CN217536330U - Quick detach formula electron rear tug device and sewing machine - Google Patents

Abstract

The utility model provides a quick-release electronic rear tug device and a sewing machine, comprising a rear tug and a drive shaft, the drive shaft is arranged in the rear tug, a buckle is arranged between the rear tug and the drive shaft, and the clip The buckle is rotatably connected with the drive shaft, and the rear tug is detachably sleeved on the outer circumference of the buckle. In the quick-release electronic rear tug device and the sewing machine of the utility model, the end of the driving shaft of the rear tug is provided with a buckle, and the rear tug is detachably sleeved on the outer periphery of the buckle. When the rear tug is worn or the outer wall is uneven and the material is not fed smoothly, the operator can quickly remove the rear tug from the drive shaft through the buckle, which is convenient for quick replacement of the rear tug and improves the replacement efficiency.

Description

Quick detach formula electron rear tug device and sewing machine

Technical Field

The utility model relates to a sewing machine equipment technical field especially relates to a tow boat device and sewing machine behind quick detach formula electron.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. The traditional sewing machine adopts a feeding mode of feeding by a cloth feeding tooth, the cloth feeding force of the feeding mode is limited, and especially for sewing materials with special materials, the cloth feeding is relatively labor-intensive and shows that the stitch is too small. For this reason, some sewing machines are provided with rear tug devices, and the conventional rear tug of the sewing machine is mainly classified into an integrated electronic rear tug and a mechanical rear support device. The rear tug mainly plays a role in assisting in dragging in the sewing process, can replace the traditional manual dragging, and realizes automatic operation. And the problems of staggered layers when sewing thin materials, difficult feeding when sewing thick materials and other sewing processes in the sewing process can be effectively solved.

In the long-term use process of the rear tug in the prior art, the periphery of the rear tug is abraded, the phenomena of unsmooth feeding, feeding obstruction and the like are caused, the key connection between the driving shaft and the rear tug needs to be knocked out in the prior art, the replacement process is troublesome and labor-consuming, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the to-be-solved technical problem of the utility model is to provide a tow boat device and be equipped with device's sewing machine behind electron with but quick assembly disassembly rear tow boat, can dismantle the rear tow boat of changing wearing and tearing fast, the presser foot mechanism with the rear tow boat of lifting of electron constructs and sewing machine and links, improve equipment's synchronism simultaneously.

The tow boat dress is for realizing above-mentioned purpose behind quick detach formula electron, the utility model provides a tow boat device behind quick detach formula electron, including back tow boat, drive shaft, the drive shaft sets up in the tow boat of back, be provided with the buckle between back tow boat and the drive shaft, buckle and drive shaft rotatable coupling, the back tow boat can be dismantled the cover and establish in the buckle periphery.

Preferably, the inner wall of the rear tug is circumferentially provided with a buckle limiting groove, the inner wall of the rear tug is axially provided with a plurality of buckle disengaging grooves, the periphery of the buckle is provided with a plurality of buckle raised heads, the number of the buckle disengaging grooves is the same as that of the buckle raised heads, and the buckle raised heads penetrate through the buckle disengaging grooves and are rotatably connected in the buckle limiting groove.

Preferably, a reset torsion spring is further arranged between the buckle and the driving shaft.

Preferably, the quick-release electronic rear tug device further comprises a presser foot pressing rod, a presser foot and a rear tug, the presser foot is fixed at the bottom end of the presser foot pressing rod, the rear tug is arranged on one side of the presser foot, and a connecting component is arranged between the rear tug and the presser foot pressing rod; the connecting part comprises a linkage ring, a connecting slide block fixed on the linkage ring and a linkage block fixed on the presser foot pressure lever, wherein a chute is formed in the linkage block, and the connecting slide block is clamped in the linkage block through the chute; the linkage ring is sleeved on the driving shaft.

Preferably, the rear tug is in transmission connection with a feeding driving assembly, the feeding driving assembly comprises a motor and a transmission assembly, the motor is fixed on the sewing machine body, and the motor is connected with the driving shaft through the transmission assembly.

Preferably, a motor support is arranged at the bottom of the motor, a rocker arm assembly is arranged on the motor support and comprises an upper rocker arm and a lower rocker arm which are hinged to the end portion of the motor support, a rocker arm shaft is hinged between the lower rocker arm and the upper rocker arm, a through hole and a clamping groove are formed in the end portion of the lower rocker arm, the central line of the through hole is perpendicular to the central line of the clamping groove, the linkage ring is clamped in the clamping groove, a driving shaft of the rear tug penetrates through the through hole and the linkage ring simultaneously, and the driving shaft is in key connection with the rear tug.

Preferably, still be provided with on the trailing wheel and lift and press the regulation subassembly, lift and press the regulation subassembly including pressure regulating guide arm, drive connecting rod, fastening at the spliced pole of pressure regulating guide arm tip, set up at the pressure regulating nut of drive connecting rod periphery side and the pressure regulating spring of cover at drive connecting rod periphery side, the pressure regulating guide arm runs through drive connecting rod, the pressure regulating spring sets up between spliced pole and pressure regulating nut, the spliced pole is articulated with lower rocking arm.

Preferably, the pressure lifting adjusting assembly further comprises a transition connecting block, a pressure lifting wrench and a pressure lifting cam, wherein a lifting pin is radially arranged at one end, far away from the connecting column, of the pressure adjusting guide rod in a penetrating manner, and the pressure lifting cam is arranged on the lower side of the lifting pin and located on one side of the pressure adjusting guide rod; the transition connecting block is arranged on one side of the pressure raising cam, and the pressure raising spanner is connected with the pressure raising cam through a connecting pin penetrating through the transition connecting block; the transition connecting block is further provided with a plurality of through holes, and the motor support is connected with the driving connecting rod through fasteners in the through holes.

Preferably, the pressure lifting adjusting assembly further comprises a shaft seat, a pressure lifting shaft, a lifting rod and a pressure rod, the lifting rod is arranged on the lower side of the lifting pin and located on the other side of the pressure adjusting guide rod, the shaft seat is arranged on one side of the lifting rod, and the shaft seat is connected with the transition connecting block through the pressure lifting shaft which is arranged in a penetrating manner; two connecting holes are formed in the lifting and pressing shaft, one end, far away from the lifting pin, of the lifting rod is inserted into any one connecting hole, and one end of the pressing rod is inserted into the other connecting hole.

In order to achieve the above object, the utility model also provides a sewing machine, include tow boat device and sewing machine organism behind the quick detach formula electron, tow boat device is fixed on the sewing machine organism behind the quick detach formula electron.

As above, the utility model relates to a tow boat device and sewing machine behind quick detach formula electron has following beneficial effect:

the utility model relates to a tow boat device and sewing machine behind quick detach formula electron, the drive shaft tip of back tow boat is provided with the buckle, and the cover can be dismantled to the back tow boat and establish in the buckle periphery. When the rear tug wheel is abraded or the outer wall is uneven, the feeding is not smooth, an operator can rapidly detach the rear tug wheel from the driving shaft through the buckle, the rear tug wheel is conveniently and rapidly detached and replaced, and the replacement efficiency is improved.

Drawings

FIG. 1 is a schematic view of the quick release electronic rear tug device of the present invention mounted on a sewing machine body;

FIG. 2 is a spatial structure diagram of the quick release electronic rear tug apparatus of the present invention;

FIG. 3 is an exploded view of the rear tug and the drive shaft of the quick disconnect electronic rear tug device of the present invention;

fig. 4 is a cross-sectional view of the rear tug of the quick disconnect electronic rear tug apparatus of the present invention;

fig. 5 is an enlarged view of the connection assembly of the quick release electronic rear tug apparatus of the present invention;

fig. 6 is a first angle space structure diagram of the pressure-lifting adjusting assembly in the quick-release electronic rear tug device of the present invention;

fig. 7 is a second angular space structure diagram of the pressure lifting adjusting assembly of the quick release electronic rear tug device of the present invention;

fig. 8 is an exploded view of the top end of the pressure adjusting guide rod of the rear tug in the quick release electronic rear tug device of the invention;

fig. 9 is a schematic view illustrating the connection between the upper rocker arm and the lower rocker arm of the quick release electronic rear tug device of the present invention;

fig. 10 is a spatial structure diagram of the synchronous belt in the quick release electronic rear tug device according to the present invention;

fig. 11 is an enlarged view of the timing belt and the rocker arm assembly of the quick release electronic rear tug device of the present invention;

fig. 12 is a spatial structure diagram of the buckle in the quick release electronic rear tug device of the present invention.

Quick detach formula electron rear tug dress annex label explanation:

1. a motor; 101. a motor bracket; 102. an end cap;

2. an upper rocker arm; 201. an upper rocker arm housing; 202. a bearing eccentric pin; 203. a rocker shaft; 204. an upper rocker shaft;

3. a lower rocker arm; 301. a lower rocker arm housing;

4. a rear tug; 401. a rear tug key groove; 402. a buckle limiting groove; 403. the buckle is separated from the groove; 404. a return torsion spring;

5. a synchronous belt; 501. a large synchronous pulley; 502. a small synchronous pulley; 503. a needle bearing;

6. a presser foot lever; 601. a linkage block; 602. connecting the sliding block; 603. a link ring; 604. a presser foot;

7. a drive link; 701. connecting columns; 702. a pressure regulating spring; 703. a pressure regulating nut; 704. a pressure regulating guide rod; 705. a lift pin;

8. a transition connecting block; 801. a shaft seat; 802. lifting and pressing the shaft; 803. lifting the rod; 804. a pressure lever; 805. lifting and pressing the cam; 806. a groove; 807. a connecting pin; 808. lifting and pressing the wrench;

9. a drive shaft; 901. a ball bearing; 902. a bearing housing; 903. a torsion spring positioning slot;

10. buckling; 1001. a buckle raised head; 1002. a push block; 1003. a torsion spring slot; 1004. the screw is positioned axially.

Detailed Description

The following description is given for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure of the present invention.

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be considered as the scope of the present invention without substantial changes in the technical content.

As shown in fig. 1 and 2, the utility model provides a tow boat device behind quick detach formula electron, for the convenience of description, as shown in fig. 1, the length direction of definition sewing machine base is left right direction, and the width direction of sewing machine base is fore-and-aft direction, and the direction of height of sewing machine base is upper and lower direction, and promptly in fig. 2, the left side and the right side of paper are left direction and right direction respectively, and the upper direction and the lower direction of paper are top direction and lower direction respectively, and the front and the back of paper are front direction and rear direction respectively.

As shown in fig. 1, fig. 2, fig. 3, the utility model provides a tow boat device behind quick detach formula electron, including back tow boat 4, drive shaft 9 passes through the key-type and connects in back tow boat 4, is provided with buckle 10 between back tow boat 4 and the drive shaft 9, and buckle 10 passes through axle position screw 1004 rotatable coupling with the left end of drive shaft 9, and the cover can be dismantled to back tow boat 4 and establish in buckle 10 periphery.

The utility model relates to a tow boat device behind quick detach formula electron, drive shaft 9 pass through the key-type and connect on rear tow boat 4 to the tip of drive shaft 9 passes through position of axle screw 1004 connect buckle 10, and rear tow boat 4 can be dismantled the cover and establish in buckle 10 periphery. When the rear tug 4 is abraded or the outer wall is uneven to cause unsmooth feeding, an operator can rapidly detach the rear tug 4 from the driving shaft 9 through the buckle 10, the rear tug 4 can be rapidly replaced conveniently, and the replacement efficiency is improved.

Preferably, as shown in fig. 3, 4 and 12, a plurality of buckle protrusions 1001 are arranged on the periphery of the buckle 10, a buckle limiting groove 402 is arranged on the inner wall of the rear tug 4 in the circumferential direction, a plurality of buckle disengaging grooves 403 are arranged on the inner wall of the rear tug 4 in the axial direction, the number of the buckle disengaging grooves 403 is the same as that of the buckle protrusions 1001, and the buckle protrusions 1001 pass through the buckle disengaging grooves 403 and are rotatably connected in the buckle limiting groove 402.

Further, as shown in fig. 3 and 12, the number of the snap bosses 1001 and the snap disengaging grooves 403 is two, the angular distance between the two snap bosses 1001 is the same as the angular distance between the two snap disengaging grooves 403, and the snap disengaging grooves 403 communicate the left end surface and the right end surface of the rear tug 4 with the snap limiting grooves 402, respectively. The operator feeds snap-fit nose 1001 through snap-fit disengaging slot 403 into snap-fit retaining slot 402, rotates snap-fit 10 and secures snap-fit nose 1001 in snap-fit retaining slot 402 by shaft screw 1004 to prevent axial misalignment between drive shaft 9 and rear tug 4.

Further, as shown in fig. 3, a shaft position screw 1004 penetrates through the buckle 10 to fasten the reset torsion spring 404 at the left end of the driving shaft 9, a gap between the two buckle raised heads 1001 forms a torsion spring clamping groove 1003, a torsion spring positioning groove 903 is further formed in the bottom surface of the left end of the driving shaft 9, and two feet of the reset torsion spring 404 are respectively clamped in the torsion spring clamping groove 1003 and the torsion spring positioning groove 903. In the initial state (with snap nose 1001 in staggered position with snap-out slot 403), return torsion spring 404 is in a zero force state with no compression and no extension. When buckle nose 1001 rotates in buckle restraint slot 402, return torsion spring 404 is forced to compress or expand; when the rotation is stopped, the return torsion spring 404 applies elastic force to the torsion spring catch 1003, thereby returning the rotation of the buckle 10 to the initial position.

Further, a push block 1002 is disposed on the left end surface of the buckle 10, so that an operator can push the buckle nose 1001 to rotate in the buckle limiting groove 402.

Preferably, as shown in fig. 3, a driving shaft connecting assembly is further disposed between the link ring 603 and the driving shaft 9, the driving shaft connecting assembly includes a plurality of ball bearings 901 and a bearing housing 902, and the link ring 603 is hinged on the outer circumference of the bearing housing 902. The ball bearing 901 and the bearing housing 902 are both provided between the drive shaft 9 and the small timing pulley 502. The number of the ball bearings 901 is two, and the ball bearings 901 are arranged in the inner walls of the two ends of the bearing sleeve 902, the through holes of the lower rocker arm 3 and the linkage ring 603 are all sleeved on the periphery of the bearing sleeve 902, and the driving shaft 9 passes through the ball bearings 901 to drive the rear tug 4 to rotate under the action of the small synchronous pulley 502. When the drive shaft 9 is lifted by the bearing housing 902 and the lower rocker arm 3, the link block 602 at the top end of the link ring 603 moves up and down in the slide groove of the link block 601. In this embodiment, the connection sliding block 602 and the sliding groove are both T-shaped, and the connection sliding block 602 is vertically inserted into the sliding groove. When the drive shaft 9 is lifted by the bearing housing 902 and the presser foot lever 6, the lower rocker arm 3 is lifted around the rocker shaft 203.

Preferably, as shown in fig. 1, 2 and 5, the quick-release electronic rear tug device further comprises a presser foot pressing rod 6, a presser foot 604 fixed at the bottom end of the presser foot pressing rod 6, and a rear tug 4, wherein the rear tug 4 is arranged at the rear side of the presser foot 604, and a connecting component is arranged between the rear tug 4 and the presser foot pressing rod 6; the connecting part comprises a linkage ring 603, a connecting slide block 602 fastened on the linkage ring 603 through a screw, and a linkage block 601 fastened on the presser foot pressure lever 6 through a screw, a chute is arranged on the linkage block 601, and the connecting slide block 602 is clamped in the linkage block 601 through the chute; the link ring 603 is sleeved on the rotation shaft of the rear tug 4. The presser foot strut 6 is a conventional component in a sewing machine.

Preferably, as shown in fig. 1, 2, 5, 9, 10 and 11, the rear tug 4 is in transmission connection with a feeding driving assembly, the feeding driving assembly comprises a motor 1 and a transmission assembly fastened on the sewing machine body through screws, the motor 1 is connected with the driving shaft 9 through the transmission assembly, the driving shaft 9 is connected with the rear tug 4 through a flat key, and the linkage ring 603 is sleeved on the outer peripheral side of the driving shaft 9. In this embodiment, a driving shaft connecting assembly is further disposed between the linkage ring 603 and the driving shaft 9, and the linkage ring 603 is sleeved on the outer peripheral side of the driving shaft connecting assembly. Further, the transmission assembly comprises a large synchronous pulley 501, a synchronous belt 5 and a small synchronous pulley 502 which are fixed on a motor shaft of the motor 1, the small synchronous pulley 502 is connected to the driving shaft 9 through a key, and the driving shaft 9 rotates under the action of the motor 1, the large synchronous pulley 501, the synchronous belt 5 and the small synchronous pulley 502. Furthermore, a casing mounting plate is fastened on the side wall of the motor 1 through screws, a motor support 101 is fastened on the bottom surface of the motor 1 through screws, the motor support 101 is fastened and connected with the casing mounting plate through screws, and the motor 1 is fastened on the sewing machine body through the casing mounting plate through screws. In the present embodiment, the motor 1 is a stepping motor.

Further, a driving shaft key groove is formed in the driving shaft 9 and is formed in the outer wall of the torsion spring positioning groove 903. Rear tug key grooves 401 are formed in the inner wall of the rear tug 4, the driving shaft key grooves and the rear tug key grooves 401 are arranged oppositely, flat keys are arranged in the middle, the rear tug 4 and the driving shaft 9 rotate synchronously, and radial offset between the driving shaft 9 and the rear tug 4 is avoided. The feeding driving component works to drive the rear tugboat 4 to rotate, so that sewn sewing materials are dragged, and the feeding function of the rear tugboat 4 is realized.

Preferably, as shown in fig. 2, 9 and 11, a rocker arm assembly is fastened on the left end face of the motor bracket 101 through screws, the rocker arm assembly comprises an upper rocker arm 2 and a lower rocker arm 3 which are hinged on the left end face of the motor bracket 101 through an upper rocker arm shaft 204, the rear end of the lower rocker arm 3 and the bottom end of the upper rocker arm 2 are hinged with a rocker arm shaft 203, the front end of the lower rocker arm 3 is provided with a through hole and a clamping groove, the central line of the through hole is perpendicular to the central line of the clamping groove, the linkage ring 603 is clamped in the clamping groove, and the driving shaft 9 of the rear tug 4 simultaneously penetrates through the through hole and the linkage ring 603. In this embodiment, the number of the through holes formed in the front end of the lower rocker arm 3 is two, a clamping groove is formed between the two through holes, the aperture of the two through holes is the same as the aperture of the link ring 603, the link ring 603 is vertically inserted into the clamping groove, and the two through holes coincide with the center line of the link ring 603.

Preferably, as shown in fig. 2 and 5, to ensure the safety during the transmission process. An upper rocker arm housing 201 is further fastened on the right side surface of the upper rocker arm 2 through screws, a lower rocker arm housing 301 is further fastened on the right side surface of the lower rocker arm 3 through screws, and the synchronous belt 5 is mounted inside the upper rocker arm housing 201 and the lower rocker arm housing 301. Furthermore, as shown in fig. 9, 10, and 11, in this embodiment, the direction of the timing belt 5 needs to be changed between the large timing pulley 501 and the small timing pulley 502, so that the rocker shaft 203 is sleeved with the needle bearings 503 and then penetrates through the lower rocker arm 3 and the upper rocker arm 2, the bearing eccentric pin 202 is further disposed right above the rocker shaft 203, the bearing eccentric pin 202 is sleeved with the needle bearings 503 and then penetrates through the upper rocker arm 2, the timing belt 5 is clamped between the two needle bearings 503 to reverse the timing belt 5, and the bearing eccentric pin 202 can adjust the tightness of the timing belt 5.

Preferably, as shown in fig. 2, 6 and 7, the rear tug 4 is further provided with a pressure-raising adjusting assembly, the pressure-raising adjusting assembly comprises a pressure-regulating guide rod 704, a driving connecting rod 7, a connecting column 701 fastened at the bottom end of the pressure-regulating guide rod 704 through a pin, a pressure-regulating nut 703 connected at the outer periphery of the driving connecting rod 7 through a thread, and a pressure-regulating spring 702 sleeved at the outer periphery of the driving connecting rod 7, the driving connecting rod 7 is a hollow part, the pressure-regulating guide rod 704 penetrates through the driving connecting rod 7, the pressure-regulating spring 702 is arranged between the connecting column 701 and the pressure-regulating nut 703, and the connecting column 701 is hinged to the lower rocker arm 3. Further, in this embodiment, the outer wall of the driving connecting rod 7 is provided with threads, the pressure regulating nut 703 is fastened and connected with the threads through threads, and the pressure regulating nut 703 is rotated to compress and stretch the pressure regulating spring 702, so that the pressing force of the rear tug 4 on the sewing material is adjusted, and the feeding capacity of the rear tug 4 is changed. The elasticity of the pressure regulating spring 702 ensures that the rear tug 4 can synchronously descend along with the presser foot pressure rod 6.

Further, as shown in fig. 6, 7, and 8, the pressure lifting adjusting assembly further includes a shaft seat 801, a transition connection block 8, a pressure lifting shaft 802, a lifting rod 803, a pressing rod 804, a pressure lifting wrench 808, and a pressure lifting cam 805, a lifting pin 705 is radially disposed at a top end of the pressure adjusting guide rod 704 in a penetrating manner, and the lifting rod 803 and the pressure lifting cam 805 are disposed below the lifting pin 705 and on left and right sides of the pressure adjusting guide rod 704; the transition connecting block 8 is arranged on the left side of the pressure lifting cam 805, and the pressure lifting wrench 808 is connected with the pressure lifting cam 805 through a connecting pin 807 penetrating through the transition connecting block 8; the shaft seat 801 is arranged on the right side of the lifting rod 803, and the shaft seat 801 is connected with the transition connecting block 8 through a penetrating lifting and pressing shaft 802; two connecting holes are formed in the lifting and pressing shaft 802, the front end of the lifting rod 803 is inserted into any connecting hole, and one end of the pressing rod 804 is inserted into the other connecting hole; still seted up a plurality of through-hole on the transition connecting block 8, the fastening screw in transition connecting block 8 passes through the through-hole is connected motor support 101 with drive connecting rod 7. Further, in this embodiment, as shown in fig. 7, a groove 806 is further formed on the lifting cam 805, when the lifting wrench 808 is partially rotated, the lifting wrench 808 rotates the lifting cam 805 through the connecting pin 807, the lifting cam 805 jacks the lifting pin 705, so that the pressure regulating guide rod 704 is lifted, and the connecting pin 701 at the bottom end of the pressure regulating guide rod 704 drives the lower rocker arm 3 to rotate upward around the rocker shaft 203, so as to lift the rear tug 4. When the push-up wrench 808 is fully rotated, the lift pins 705 snap into the recesses 806, with the push-up adjustment assembly in a dead-center position and the rear tug 4 in a raised position. For operation, an end of the pressing rod 804 remote from the pressure-lifting shaft 802 extends to the front of the electronic rear tug device, preferably to the right of the pressure foot 604, for the operator to adjust the pressing rod 804.

In the embodiment, as shown in fig. 6, 7 and 8, the pressing rod 804 is L-shaped, when an operator presses the pressing rod 804, the pressing rod 804 drives the lifting shaft 802 to rotate counterclockwise, the lifting shaft 802 drives the lifting rod 803 to rotate counterclockwise, the lifting rod 803 rotates counterclockwise to jack up the lifting pin 705, so that the pressure regulating guide rod 704 rises, and the connecting column 701 at the bottom end of the pressure regulating guide rod 704 drives the lower rocker arm 3 to rotate upward around the rocker arm shaft 203, so that the rear tug 4 rises. In the process of lifting the rear tug 4, the distance between the connecting column 701 and the pressure regulating nut 703 is reduced, the pressure regulating spring 702 is compressed, when the rear tug 4 needs to be lowered, an operator releases the pressing rod 804, the connecting column 701 moves downwards under the elastic force of the pressure regulating spring 702, the lower rocker arm 3 rotates downwards around the rocker arm shaft 203, the rear tug 4 is lowered, and meanwhile, the pressure regulating guide rod 704 and the lifting pin 705 reset, so that the rear tug 4 can be conveniently lifted next time.

Further, as shown in fig. 1 and 2, an end cover 102 is further disposed on a left end surface of the motor bracket 101 to protect the motor 1.

The utility model also provides a sewing machine, sewing machine contain above-mentioned tow boat device behind quick detach formula electron.

The utility model relates to a tow boat device behind quick detach formula electron at first connects each spare part as figure 1-12 before the use, then sews up different seam material and have the following condition:

1. when the rear tug 4 is normally lifted, pressed and fed

According to the material of the sewing material, an operator firstly adjusts the pressure regulating nut 703 to ensure that the pressure regulating spring 702 is installed between the connecting column 701 and the pressure regulating nut 703 and is in a compressed state, so as to ensure that the rear tug 4 has a certain pressing force on the sewing material, and the feeding is convenient (the initial pressure state of the pressure regulating spring 702 can meet the material of most sewing materials, and can not adjust the pressure regulating spring 702, depending on the material of the sewing material). An operator raises the presser foot pressure lever 6 (the presser foot pressure lever 6 is a conventional component of a sewing machine), the linkage block 601 fastened on the presser foot pressure lever 6 is raised along with the presser foot pressure lever 6, the T-shaped connecting slide block 602 clamped in the chute of the linkage block 601 is raised to further drive the linkage ring 603 to be raised, the linkage ring 603 is raised to drive the driving shaft 9 to be raised, the lower rocker arm 3 is further turned upwards around the rocker arm shaft 203, the distance between the connecting column 701 and the pressure regulating nut 703 is reduced, the pressure regulating spring 702 is in a compression state, and the rear tug 4 is raised along with the presser foot pressure lever 6 synchronously. An operator puts the sewing material to be sewn under the presser foot 604, lowers the presser foot pressure rod 6, lowers the linkage block 601 fastened on the presser foot pressure rod 6 along with the presser foot pressure rod 6, lowers the T-shaped connecting slide block 602 clamped in the chute of the linkage block 601 along with the linkage block 601 under the elastic force of the pressure regulating spring 702, then the linkage ring 603 drives the driving shaft 9 to descend, the lower rocker arm 3 downwards overturns around the rocker arm shaft 203, the rear tug 4 descends along with the driving shaft 9 to compress the sewing material, and at the moment, the pressure regulating spring 702 returns to a normal state, so that the pressure lifting function of the rear tug 4 is realized by virtue of the lifting of the presser foot pressure rod 6; when the thickness of the sewing material is slowly changed from thin to thick or the thickness change is small, the presser foot 604 is lifted to drive the rear tug 4 to be lifted synchronously, so that the feeding is smoother.

When the rear tug 4 and the presser foot 604 are pressed on the sewing material, an operator turns on the motor 1, the motor 1 works through the large synchronous belt wheel 501 → the synchronous belt 5 → the small synchronous belt wheel 502 → the driving shaft 9, the rear tug 4 rotates through a flat key between the driving shaft 9 and the rear tug 4, and the rear tug 4 rotates to be matched with teeth of the sewing machine, so that the feeding function of the rear tug 4 is realized.

2. When the sewing material does not need the lifting and the feeding of the rear tug 4

When some sewing scenes do not need the pressure lifting and feeding functions of the rear tug 4, an operator rotates the pressure lifting wrench 808, the pressure lifting wrench 808 drives the pressure lifting cam 805 to rotate through the connecting pin 807, the pressure lifting cam 805 rotates to jack the lifting pin 705, the pressure regulating guide rod 704 rises, after the pressure lifting cam 805 completely rotates to a position, the lifting pin 705 is clamped into the groove 806 of the pressure lifting cam 805, the pressure lifting regulating assembly is at a dead point position at the moment, the connecting pin 701 rises along with the pressure regulating guide rod 704 to drive the rear tug 4 to be in a lifting state, and the pressure regulating spring 702 is in a compression state. When the operator rotates the lifting wrench 808 to reset, the lifting pin 705 is disengaged from the groove 806 of the lifting cam 805, and the pressure regulating guide rod 704 returns to the downward pressing state under the elastic force of the pressure regulating spring 702, so that the lifting and feeding functions are realized again.

3. When the rear tug 4 is lifted and pressed independently

When the thickness of the sewing material or the passing stem is continuously changed from thin to thick in the sewing process, the sewing material stem passes through the lower part of the presser foot 604, the presser foot 604 rises → descends, the rear tug 4 follows the rising → descends, the sewing material stem may be positioned between the presser foot 604 and the rear tug 4, and cloth clamping between the rear tug 4 and the presser foot 604 may be caused. At this time, an operator presses down the pressing rod 804, the pressing rod 804 drives the lifting shaft 802 to rotate so as to drive the lifting rod 803 to rotate upwards, the lifting rod 803 lifts the lifting pin 705 and further lifts the pressure regulating guide rod 704, the connecting column 701 at the bottom end of the pressure regulating guide rod 704 drives the lower rocker arm 3 to turn upwards around the rocker shaft 203, and further lifts the rear tug 4, the pressure regulating spring 702 is in a compressed state, and cloth cannot be clamped between the pressing foot 604 and the rear tug 4 by sewing materials. When an operator releases the pressure lever 804, the pressure regulating spring 702 extends to press the connecting column 701 downwards, the rear tug 4 and the lower rocker arm 3 rotate downwards around the rocker arm shaft 203, the rear tug 4 compresses the sewing materials, the connecting column 701 drives the pressure regulating guide rod 704 to move downwards, the lifting pin 705 downwards enables the lifting rod 803 to reset, and the lifting pin 705 resets, so that the rear tug 4 can be conveniently lifted and pressed again subsequently. In other embodiments, the action of pressing the pressing rod 804 by the operator can be replaced by an automatic control mode such as pneumatic driving or linear motor driving, and meanwhile, the motion state of the feeding of the sewing material at the rear tug 4 is detected and transmitted back through the control system, and then the pneumatic driving or linear motor is controlled by the control system to press the pressing rod 804, so that the rear tug 4 is lifted, and when the thickness of the sewing material is continuously changed greatly, the rear tug 4 automatically adjusts the height. The motion state detection at the rear tug 4 can be realized by a speed sensor or the like.

4. When the rear tug 4 needs to be replaced

When the rear tug 4 is used for a long time and is seriously worn and needs to be replaced, an operator loosens the shaft position screw 1004, then the buckle 10 is rotated through the push block 1002 on the left end surface of the buckle 10, the buckle 10 rotates to drive the buckle raised head 1001 to rotate in the buckle limiting groove 402, at the moment, the reset torsion spring 404 deforms in the torsion spring positioning groove 903 and the torsion spring clamping groove 1003 until the buckle raised head 1001 is aligned with the buckle disengaging groove 403, the operator axially pulls out the rear tug 4, the flat key disengages from the driving shaft key groove and the rear tug key groove 401, and the operator replaces the rear tug 4; aligning a new buckle disengaging groove 403 of the rear tug 4 with a buckle raised head 1001 and axially plugging the new buckle disengaging groove into the outer peripheral sides of the driving shaft 9 and the buckle 10, clamping the buckle raised head 1001 in a buckle limiting groove 402 on the inner wall of the rear tug 4, loosening a push block 1002 by an operator, automatically rotating the buckle 10 under the action of a reset torsion spring 404, staggering the buckle raised head 1001 and the buckle disengaging groove 403, screwing a shaft position screw 1004 to limit axial displacement of the rear tug 4, axially plugging a flat key into a driving shaft key groove and a rear tug key groove 401, enabling the rear tug 4 and the driving shaft 9 to synchronously rotate, and achieving the feeding function of the rear tug 4.

The utility model relates to a tow boat device behind quick detach formula electron can change through buckle 10 fast between rear tow boat 4 and the drive shaft 9 to 4 peripheral wearing and tearing of rear tow boat are serious, when the pay-off function is impaired, change rear tow boat 4 fast, practice thrift change time, improvement production efficiency. The driving source with the pressure lifting function of the rear tug 4 is shared with the pressure foot pressing rod 6, so that one driving source is saved, the functions of two driving sources can be realized, the structure is simple, and the cost is reduced; the rear tug 4 is synchronously linked with the presser foot and pressure rod 6, the lifting and pressing response speed of the rear tug 4 is higher, and the sewing quality is ensured; the pressure lifting adjusting component of the rear tug 4 can be suitable for the condition that the thickness of the sewing material is changed from thin to thick, and the sewing material does not need the rear tug 4, so that the application range is wide, and the functionality is strong.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a tow boat device behind quick detach formula electron which characterized in that: including back tow boat (4), drive shaft (9) set up in back tow boat (4), be provided with buckle (10) between back tow boat (4) and drive shaft (9), buckle (10) and drive shaft (9) rotatable coupling, the cover can be dismantled in back tow boat (4) and establish buckle (10) periphery.

2. The quick release type electronic rear tug device of claim 1, further comprising: the inner wall of the rear tug (4) is circumferentially provided with a buckle limiting groove (402), the inner wall of the rear tug (4) is axially provided with a plurality of buckle disengaging grooves (403), the periphery of the buckle (10) is provided with a plurality of buckle raised heads (1001), the number of the buckle disengaging grooves (403) is the same as that of the buckle raised heads (1001), and the buckle raised heads (1001) penetrate through the buckle disengaging grooves (403) and are rotatably connected in the buckle limiting groove (402).

3. The quick release type electronic rear tug device of claim 1, further comprising: and a reset torsion spring (404) is also arranged between the buckle (10) and the driving shaft (9).

4. The quick release type electronic rear tug device of claim 1, further comprising: the clamp is characterized by further comprising a clamp pressing rod (6), a clamp pressing rod (604) and a rear tug (4), wherein the clamp pressing rod (604) is fixed at the bottom end of the clamp pressing rod (6), the rear tug (4) is arranged on one side of the clamp pressing rod (604), and a connecting component is arranged between the rear tug (4) and the clamp pressing rod (6); the connecting component comprises a linkage ring (603), a connecting slide block (602) fixed on the linkage ring (603) and a linkage block (601) fixed on the presser foot pressure lever (6), a sliding groove is formed in the linkage block (601), and the connecting slide block (602) is clamped in the linkage block (601) through the sliding groove; the linkage ring (603) is sleeved on the driving shaft (9).

5. The quick release type electronic rear tug device of claim 4, characterized in that: the rear tug (4) is in transmission connection with a feeding driving assembly, the feeding driving assembly comprises a motor (1) fixed on the sewing machine body and a transmission assembly, and the motor (1) is connected with the driving shaft (9) through the transmission assembly.

6. The quick release type electronic rear tug device of claim 5, further comprising: the electric power steering gear is characterized in that a motor support (101) is arranged at the bottom of the motor (1), a rocker arm assembly is arranged on the motor support (101), the rocker arm assembly comprises an upper rocker arm (2) and a lower rocker arm (3) which are hinged to the end of the motor support (101), a rocker arm shaft (203) is hinged between the lower rocker arm (3) and the upper rocker arm (2), a through hole and a clamping groove are formed in the end of the lower rocker arm (3), the central line of the through hole is perpendicular to the central line of the clamping groove, the linkage ring (603) is connected in the clamping groove, a driving shaft (9) of the rear towing wheel (4) penetrates through the through hole and the linkage ring (603) at the same time, and the driving shaft (9) is connected with the rear towing wheel (4) through a key.

7. The quick release type electronic rear tug device of claim 6, further comprising: still be provided with on back tow boat (4) and lift and press the regulation subassembly, it includes pressure regulating guide arm (704), drive connecting rod (7), fastens spliced pole (701) at pressure regulating guide arm (704) tip, sets up pressure regulating nut (703) at drive connecting rod (7) periphery side and overlaps and establish pressure regulating spring (702) at drive connecting rod (7) periphery side, pressure regulating guide arm (704) run through drive connecting rod (7), pressure regulating spring (702) set up between spliced pole (701) and pressure regulating nut (703), spliced pole (701) are articulated with lower rocking arm (3).

8. The quick release type electronic rear tug device of claim 7, further comprising: the pressure lifting adjusting assembly further comprises a transition connecting block (8), a pressure lifting wrench (808) and a pressure lifting cam (805), one end, far away from the connecting column (701), of the pressure adjusting guide rod (704) radially penetrates through a lifting pin (705), and the pressure lifting cam (805) is arranged on the lower side of the lifting pin (705) and located on one side of the pressure adjusting guide rod (704); the transition connecting block (8) is arranged on one side of the pressure lifting convex wheel (805), and the pressure lifting wrench (808) is connected with the pressure lifting convex wheel (805) through a connecting pin (807) penetrating through the transition connecting block (8); still seted up a plurality of through-hole on transition connecting block (8), transition connecting block (8) are connected motor support (101) and drive connecting rod (7) through the fastener in the through-hole.

9. The quick release type electronic rear tug device of claim 7, further comprising: the pressure lifting adjusting assembly further comprises a shaft seat (801), a pressure lifting shaft (802), a lifting rod (803) and a pressure rod (804), the lifting rod (803) is arranged on the lower side of the lifting pin (705) and is positioned on one side of the pressure adjusting guide rod (704), the shaft seat (801) is arranged on one side of the lifting rod (803), and the shaft seat (801) is connected with the transition connecting block (8) through the penetrating pressure lifting shaft (802); two connecting holes are formed in the lifting and pressing shaft (802), one end, far away from the lifting pin (705), of the lifting rod (803) is inserted into any one connecting hole, and one end of the pressing rod (804) is inserted into the other connecting hole.

10. A sewing machine characterized by: the quick-release electronic rear tug device comprises the quick-release electronic rear tug device and a sewing machine body, wherein the quick-release electronic rear tug device is fixed on the sewing machine body.

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