CN201592425U

CN201592425U - Multifunctional electric cutting angle grinder

Info

Publication number: CN201592425U
Application number: CN2010200498902U
Authority: CN
Inventors: 崔宏达; 吴江涛
Original assignee: Ningbo Langda Electronic Technology Co Ltd
Current assignee: Ningbo Langda Electronic Technology Co Ltd
Priority date: 2010-01-08
Filing date: 2010-01-08
Publication date: 2010-09-29
Anticipated expiration: 2020-01-08

Abstract

The utility model discloses a multifunctional electric cutting angle grinder comprising a motor (8) in a shell (1), big and small bevel gears (6 and 7) that are mutually meshed, an intermediate shaft (4) and an output shaft (2), as well as a gear shifting device (9), wherein the small bevel gear (7) is connected on a motor shaft; the big bevel gear (6) is connected on the intermediate shaft (4); both the intermediate shaft (4) and the output shaft (2) are rotatably connected in the shell (1) and are connected with each other by two groups of meshing gears with different transmission ratios; a clutch device (3) is arranged between the two groups of meshing gears and is in slide fit on the output shaft (2); and the gear shifting device (9) is arranged on the shell (1) and connected with the clutch device (3). After adopting the structure, the multifunctional electric cutting angle grinder can realize two-gear output rotation speed, therefore, the effects of cutting or grinding different materials of workpieces according to needs are very good.

Description

Multifunctional electric cutting angle grinder

Technical Field

The utility model relates to an electric tool field specifically says to a collect cutting and polish function in multi-functional electronic cutting angle mill of an organic whole.

Background

An angle grinder, also called an angle grinder, is mainly used for grinding burrs and welding beadings on the surface of a workpiece, and can also be used for polishing and the like. The cutting machine is mainly used for cutting wood or metal plates and the like. Generally speaking, these are two different electric tools, but at present, the prior art has appeared a multi-functional electric cutting angle grinder with both cutting function and angle grinding function, which comprises a motor located in a housing, a small bevel gear and a large bevel gear which are mutually engaged, an intermediate shaft, an output shaft and a cutting blade or a grinding wheel, wherein the small bevel gear is connected on a motor shaft, the intermediate shaft and the output shaft are both rotatably connected in the housing, the large bevel gear is fixedly connected on the intermediate shaft, the intermediate shaft is connected with the output shaft through the engaging gear, and the end of the output shaft extending out of the housing is provided with the cutting blade or the grinding wheel. When the motor is electrified to work, the intermediate shaft is rotated through the large bevel gear and the small bevel gear which are mutually meshed, and then the output shaft is rotated through the transmission of the meshing gear, so that the cutting blade or the grinding wheel is driven to rotate, and the cutting or grinding function is realized.

However, the electric cutting angle grinder with the structure has the following disadvantages: generally, the optimum rotation speed of a blade for cutting wood or metal plate is about 5500 rpm and the optimum rotation speed of a grinding wheel for cutting stone or grinding metal surface is about 11000 rpm, but the electric cutting angle grinder of this structure can only realize single rotation speed output from a gear transmission structure, or the output rotation speed is about 5500 rpm or about 11000 rpm, which means that it is not a true multifunctional electric cutting angle grinder because: if the output rotating speed of the blade is 5500 revolutions per minute or so, the effect of cutting wood and metal plates is good, and the effect of cutting stone and polishing metal surfaces is poor; if the output rotating speed of the blade is about 11000 r/min, the effects of cutting stone and polishing metal surfaces are good, and the effects of cutting wood and metal plates are poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a can export the second gear rotational speed, cut and polish its equal fine multi-functional electronic cutting angle mill of effect of work piece of different materials is provided.

In order to solve the technical problem, the utility model provides a multi-functional electric cutting angle mill, it includes motor, intermeshing's little bevel gear and big bevel gear, jackshaft and the output shaft that is located the casing, little bevel gear connect on the motor shaft, big bevel gear connects on the jackshaft, jackshaft and output shaft all rotate to be connected in the casing, and connect through the meshing gear each other, the end that the output shaft stretches out the casing is connected with cutting blade or grinding wheel piece, the meshing gear be two sets of meshing gears that the drive ratio is different, be equipped with clutch between two sets of meshing gears, clutch sliding fit on the output shaft; the multifunctional electric cutting angle grinder also comprises a gear shifting device, wherein the gear shifting device is installed on the shell and is connected with the clutch device.

After the structure more than adopting, compared with the prior art, the utility model, have following advantage: because it has two sets of meshing gears to carry out transmission power between jackshaft and the output shaft, these two sets of meshing gears's drive ratio is different, set up clutch simultaneously between two sets of meshing gears, and installed the device of shifting gears who is connected with clutch on the casing, like this, make the operator can dial clutch to two different positions according to the needs that the cutting was still polished, make one of them group in two sets of meshing gears carry out the transmission, thereby realize two grades of output speed, the effect of cutting or polishing is all fine according to actual need like this.

The two groups of meshing gears are respectively a first gear, a second gear, a third gear and a fourth gear, the first gear and the third gear are tightly matched on the intermediate shaft, the second gear and the fourth gear are in clearance fit on the output shaft, the second gear and the fourth gear are axially limited by two limiting pins, and the end surfaces of the second gear and the fourth gear, which are far away from the limiting pins, are limited by check rings which are connected to the output shaft in a clamping manner; the first gear is meshed with the second gear, and the third gear is meshed with the fourth gear. By adopting the structure, the second gear and the fourth gear can only do relatively independent radial rotation on the output shaft, but can not do axial movement.

The clutch device comprises a clutch seat and a clutch rod, and the clutch seat is connected with the output shaft through a spline and is in sliding fit with the two limit pins; the clutch device comprises a clutch seat, at least two clutch rods, a clutch rod and a clutch rod, wherein the clutch rods are arranged in the clutch seat, and one end of each clutch rod can protrude out of the end surface of the clutch seat; two end surfaces of the clutch seat are at least provided with a protruding part of a clutch lever, and the opposite end surfaces of the second gear and the fourth gear are respectively provided with a concave hole matched with the protruding part of the clutch lever; the gear shifting device comprises a shifting fork, a guide rail and a speed-regulating shifting button, wherein two ends of the guide rail are connected with the shell, the shifting fork is in sliding fit on the guide rail and is connected with the speed-regulating shifting button, and the speed-regulating shifting button is connected with the shell; an annular groove is formed in the outer circular surface of the clutch base, and one fork foot of the shifting fork is located in the annular groove. The speed regulation dial button is tightly matched with a pin, the shifting fork is provided with a long waist hole, and the pin is in sliding fit in the long waist hole. After the structure is adopted, the whole clutch device and the gear shifting device have simpler structures and more compact volumes, and are more beneficial to the industrialization of products.

The clutch rod is characterized in that a shaft shoulder is arranged in the middle of the axial direction of the clutch rod, a cover plate is tightly matched in a mounting hole of the clutch seat for mounting the clutch rod, a spring is arranged between the shaft shoulder in the mounting hole and the cover plate, and two ends of the spring are respectively abutted against the shaft shoulder and the cover plate. After the structure is adopted, the clutch rod is telescopic relative to the clutch seat, so that when the clutch device is close to any gear end face and is tightly attached, the clutch rod is contracted in the clutch seat, at the moment, only the output shaft needs to be slightly rotated, and the clutch rod can be easily and automatically bounced into the concave hole until the clutch rod rotates to the position of the concave hole, so that the operation is more convenient and easier.

The number of the clutch rods is four, every two clutch rods are symmetrically distributed on the clutch seat in a group, the number of the concave holes matched with the clutch rods is four correspondingly, and every two clutch rods are symmetrically distributed on the opposite end faces of the second gear and the fourth gear in a group; correspondingly, the number of the springs and the cover plate is four. After the structure with the optimal number is adopted, the structure is simplest, and the action of the clutch device is more stable.

Drawings

FIG. 1 is a schematic structural view of a prior art electric cutting angle grinder;

FIG. 2 is a schematic structural view of one gear of the multifunctional electric cutting angle grinder of the present invention;

FIG. 3 is an enlarged schematic view of a portion of the structure of FIG. 2;

FIG. 4 is a schematic view of the structure of FIG. 3 in the direction A-A;

FIG. 5 is a schematic view of another gear of the multi-functional electric cutting angle grinder of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5

FIG. 7 is a schematic diagram of the position of the speed-adjusting knob and the shifting fork of the present invention at the first gear speed;

fig. 8 is a schematic diagram of the position of the speed-adjusting knob and the shifting fork of the present invention at another gear of the rotating speed.

Wherein,

the prior art is as follows: 1', a shell; 2', an output shaft; 4', an intermediate shaft; 5', cutting blade or grinding wheel; 6', a large bevel gear; 7', a bevel pinion; 8', a motor; 10', a first gear; 11', a second gear;

the utility model discloses: 1. a housing; 2. an output shaft; 3. a clutch device; 31. a clutch lever; 311. a shaft shoulder; 32. a spring; 33. a cover plate; 34. a clutch seat; 341. an annular groove; 4. an intermediate shaft; 5. cutting blades or grinding wheels; 6. a large bevel gear; 7. a bevel pinion gear; 8. a motor; 9. a gear shifting device; 91. a shifting fork; 92. a speed-regulating toggle; 93. a guide rail; 94. a pin; 95. a long waist hole; 10. a first gear; 11. a second gear; 12. a third gear; 13. a fourth gear; 14. a spacing pin; 15. a retainer ring; 16. a concave hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As can be seen from the schematic structural diagram of the prior art electric cutting angle grinder shown in fig. 1, the electric cutting angle grinder comprises a motor 8 ', a small bevel gear 7 ' and a large bevel gear 6 ' which are meshed with each other, an intermediate shaft 4 ' and an output shaft 2 ', wherein the output shaft of the motor 8 ' is connected with the small bevel gear 7 ', the large bevel gear 6 ' is connected with the intermediate shaft 4 ', the intermediate shaft 4 ' and the output shaft 2 ' are both rotatably connected with each other in a housing 1 ' and are connected with each other through a set of meshed gears, namely a first gear 10 ' and a second gear 11 ', and the end of the output shaft 2 ' extending out of the housing 1 ' is connected with a cutting blade or a grinding wheel 5 '.

When the motor is used, a power supply is switched on, the rotation of the motor shaft enables the intermediate shaft 4 'to rotate through the small bevel gear 7' and the large bevel gear 6 'which are meshed with each other, and then the output shaft 2' rotates through the first gear 10 'and the second gear 11' which are meshed with each other, but the structure can only output a single rotating speed.

By figure 2 ~ 6 the utility model discloses multi-functional electronic cutting angle mill's structural schematic diagram can know, it is including motor 8, intermeshing's little bevel gear 7 and big bevel gear 6, jackshaft 4 and the output shaft 2 that is located casing 1, little bevel gear 7 connect on motor 8's motor shaft, big bevel gear 6 is connected on jackshaft 4, jackshaft 4 and output shaft 2 all rotate to be connected in casing 1, and through meshing gear connection each other, the end connection that output shaft 2 stretches out casing 1 has cutting blade or grinding wheel 5. The meshing gears are two groups of meshing gears with different transmission ratios, a clutch device 3 is arranged between the two groups of meshing gears, and the clutch device 3 is in sliding fit with the output shaft 2. The multifunctional electric cutting angle grinder also comprises a gear shifting device 9, wherein the gear shifting device 9 is installed on the shell 1 and is connected with the clutch device 3.

The two groups of meshing gears are respectively a first gear 10, a second gear 11, a third gear 12 and a fourth gear 13, the first gear 10 and the third gear 12 are tightly matched on the intermediate shaft 4, the second gear 11 and the fourth gear 13 are in clearance fit on the output shaft 2, the second gear 11 and the fourth gear 13 are axially limited by two limit pins 14, and the end faces, far away from the limit pins 14, of the second gear 11 and the fourth gear 13 are limited by retainer rings 15 clamped on the output shaft 2. The first gear 10 and the second gear 11 mesh, and the third gear 12 and the fourth gear 13 mesh.

The clutch device 3 comprises a clutch seat 34 and a clutch rod 31, wherein the clutch seat 34 is in spline connection with the output shaft 2 and is in sliding fit with the two limit pins 14; at least two clutch rods 31 are arranged in the clutch seat 34, and one end of each clutch rod 31 can protrude out of the end surface of the clutch seat 34; the clutch seat 34 has at least one protrusion of the clutch lever 31 on two end surfaces, and the second gear 11 and the fourth gear 13 have concave holes 16 on opposite end surfaces for matching with the protrusion of the clutch lever 31. The device 9 of shifting include shift fork 91, guide rail 93 and speed governing dial button 92, the both ends of guide rail 93 be connected with casing 1, shift fork 91 sliding fit on guide rail 93 and dial button 92 with the speed governing and be connected, the speed governing dial button 92 connect on casing 1. The outer circular surface of the clutch base 34 is provided with an annular groove 341, and one of the fork legs of the shifting fork 91 is positioned in the annular groove 341. The speed regulation toggle button 92 is tightly matched with a pin 94, the shifting fork 91 is provided with a long waist hole 95, and the pin 94 is in sliding fit in the long waist hole (95).

The axial middle part of the clutch rod 31 is provided with a shaft shoulder 311, a cover plate 33 is tightly matched in a mounting hole of the clutch seat 34 for mounting the clutch rod 31, a spring 32 is arranged between the shaft shoulder 311 and the cover plate 33 in the mounting hole, and two ends of the spring 32 are respectively abutted against the shaft shoulder 311 and the cover plate 33.

In this embodiment, four clutch rods 31 are provided, and are symmetrically distributed on the clutch seat 34 in pairs, and four concave holes 16 matched with the clutch rods 31 are correspondingly provided, and are symmetrically distributed on the opposite end surfaces of the second gear 11 and the fourth gear 13 in pairs; accordingly, the number of springs 32 and cover plates 33 is also four.

When the present invention shown in fig. 7 is located at one of the rotation speed positions, the pin 94 of the speed-adjusting knob 92 is located above the long waist hole 95 of the shifting fork 91. When the speed knob 92 is rotated, the pin 94 rotates on the one hand about the axis of the speed knob 92 and slides in the elongated slot 95 on the other hand, thus forcing the fork 91 to move linearly on the rail 93 until it rotates to another rotational position, as shown in fig. 8.

When the gear shifting knob 92 is shifted to the position shown in fig. 2 and 3, the clutch device 3 is tightly attached to the second gear 11, and the portion of the clutch lever 31 protruding from the end surface of the clutch base 34 is located in the concave hole 16 of the second gear 11, in other words, the clutch device 3 is engaged with the second gear 11, and the fourth gear 13 is disengaged from the clutch device 3. Thus, when the motor 8 works, the rotation of the motor shaft enables the small bevel gear 7 to rotate along with the small bevel gear, the intermediate shaft 4 rotates through the meshing of the large bevel gear and the small bevel gear, the second gear 11 drives the clutch seat 34 to rotate through the meshing transmission of the first gear 10 and the second gear 11, and the clutch seat 34 is in splined connection with the output shaft 2, so that the output shaft 2 outputs the rotating speed of the first gear. At this time, the third gear 12 and the fourth gear 13 are also in mesh transmission, and since the fourth gear 13 is in clearance fit with the output shaft 2, the fourth gear 13 idles only on the output shaft 2 and does not output the rotational speed.

When the gear shifting knob 92 is shifted to the position shown in fig. 5 and 6, the clutch device 3 is tightly attached to the fourth gear 13, and the portion of the clutch lever 31 protruding from the end surface of the clutch seat 34 is located in the concave hole 16 of the fourth gear 13, in other words, the clutch device 3 is engaged with the fourth gear 13, and the second gear 11 is disengaged from the clutch device 3. Thus, when the motor 8 works, the rotation of the motor shaft enables the small bevel gear 7 to rotate along with the small bevel gear, the intermediate shaft 4 rotates through the meshing of the large bevel gear and the small bevel gear, and the fourth gear 13 drives the clutch seat 34 to rotate through the meshing transmission of the third gear 12 and the fourth gear 13, and the clutch seat 34 is in splined connection with the output shaft 2, so that the output shaft 2 outputs the rotating speed of the second gear. At this time, the first gear 10 and the second gear 11 are also in mesh transmission, and the second gear 11 is in clearance fit with the output shaft 2, so that the second gear 11 only idles on the output shaft 2 and does not output the rotational speed.

The utility model is not limited to the structure of the above-mentioned specific embodiment, wherein the number of the clutch levers can be six, eight, etc., and the number of the springs, the cover plate and the concave holes is changed correspondingly; the connection between the output shaft and the clutch seat can also be flat key connection; the shifting fork can be made into only one foot; and so on. The above changes are all within the protection scope of the present invention.

Claims

1. The utility model provides a multi-functional electronic cutting angle mill, is including motor (8), intermeshing's small bevel gear (7) and big bevel gear (6), jackshaft (4) and output shaft (2) that are located casing (1), small bevel gear (7) connect on the motor shaft, big bevel gear (6) are connected on jackshaft (4), jackshaft (4) and output shaft (2) are all rotated and are connected in casing (1), and through meshing gear connection each other, the end connection that output shaft (2) stretched out casing (1) has cutting blade or emery wheel piece (5), its characterized in that: the meshing gears are two groups of meshing gears with different transmission ratios, a clutch device (3) is arranged between the two groups of meshing gears, and the clutch device (3) is in sliding fit with the output shaft (2); the multifunctional electric cutting angle grinder also comprises a gear shifting device (9), wherein the gear shifting device (9) is installed on the shell (1) and is connected with the clutch device (3).

2. The multi-functional electric cutting angle grinder of claim 1, wherein: the two groups of meshing gears are respectively a first gear (10), a second gear (11), a third gear (12) and a fourth gear (13), the first gear (10) and the third gear (12) are tightly matched on the intermediate shaft (4), the second gear (11) and the fourth gear (13) are in clearance fit on the output shaft (2), the second gear (11) and the fourth gear (13) are axially limited by two limiting pins (14), and the end faces, far away from the limiting pins (14), of the second gear (11) and the fourth gear (13) are limited by check rings (15) which are clamped on the output shaft (2); the first gear (10) is meshed with the second gear (11), and the third gear (12) is meshed with the fourth gear (13).

3. The multifunctional electric cutting angle grinder of claim 1 or 2, characterized in that: the clutch device (3) comprises a clutch seat (34) and a clutch rod (31), wherein the clutch seat (34) is in spline connection with the output shaft (2) and is in sliding fit with the two limit pins (14); at least two clutch rods (31) are arranged in the clutch seat (34), and one end of each clutch rod (31) can protrude out of the end surface of the clutch seat (34); two end surfaces of the clutch seat (34) are at least provided with a protruding part of a clutch rod (31), and the opposite end surfaces of the second gear (11) and the fourth gear (13) are respectively provided with a concave hole (16) matched with the protruding part of the clutch rod (31); the gear shifting device (9) comprises a shifting fork (91), a guide rail (93) and a speed-regulating shifting button (92), two ends of the guide rail (93) are connected with the shell (1), the shifting fork (91) is in sliding fit with the guide rail (93) and is connected with the speed-regulating shifting button (92), and the speed-regulating shifting button (92) is connected with the shell (1); an annular groove (341) is formed in the outer circular surface of the clutch seat (34), and one fork foot of the shifting fork (91) is located in the annular groove (341).

4. The multi-functional electric cutting angle grinder of claim 3, wherein: the speed regulation is dialled button (92) and is fastened fit with pin (94), shift fork (91) on be equipped with long waist hole (95), pin (94) sliding fit in long waist hole (95).

5. The multi-functional electric cutting angle grinder of claim 3, wherein: the clutch rod (31) is provided with a shaft shoulder (311) in the middle in the axial direction, a cover plate (33) is tightly matched in a mounting hole for mounting the clutch seat (34) on the clutch rod (31), a spring (32) is arranged between the shaft shoulder (311) and the cover plate (33) in the mounting hole, and two ends of the spring (32) are respectively abutted against the shaft shoulder (311) and the cover plate (33).

6. The multi-functional electric cutting angle grinder of claim 3, wherein: the number of the clutch rods (31) is four, every two clutch rods are symmetrically distributed on the clutch seat (34) in a group, the number of the concave holes (16) matched with the clutch rods (31) is four correspondingly, and every two clutch rods are symmetrically distributed on the opposite end faces of the second gear (11) and the fourth gear (13) in a group; accordingly, the number of the springs (32) and the cover plates (33) is four.