CN101213918A - lawn pruning shears - Google Patents

Abstract

A kind of grass cutting pruning shears, which is composed of a main machine, a wheel assembly, and an extension handle. The main machine casing is equipped with a power supply, a first micro switch, a motor, a first switch button for the opening and closing motor, and a first self-locking push button. The output of the motor drives the shearing mechanism through the gear box and the eccentric mechanism. There are also a pair of casing pole pieces, a switch pressure rod, and a second micro switch in the casing; the detachable connection at the bottom of the casing is composed of a base, a wheel seat, and wheels. The pole piece of the positioning piece on the wheel assembly is in conflict with the pole piece of the chassis; the extension handle is detachably connected to the wheel assembly at multiple angles, the pole piece of the fixed block on it is in conflict with the pole piece of the positioning piece, and the pole piece of the fixed block is in conflict with the pole piece of the positioning piece. The chip is electrically connected to the third micro switch, and the motor is started by the second switch button and the second self-locking push button. This design has three application modes, which can be used alone or in combination according to different purposes, expanding the scope of application, easy to use, using lithium batteries as the power supply, good environmental protection performance, interchangeable shearing mechanism, one machine with multiple functions, double safety switch safety is good .

Description

grass pruning shears

technical field

The invention relates to the technical field of garden machinery, in particular to a grass-cutting pruning shears capable of pruning lawns and branches.

Background technique

Grass-cutting pruning shears are portable tools used to trim garden lawns, flowers, fruits and branches. They are an essential tool for people to create a clean and green living environment. Manual shears that were commonly used in the past were eliminated due to laborious, high strength and low efficiency. , has long been replaced by electric pruning shears. There are many varieties of electric pruning shears, usually with a rechargeable battery as the power supply, the double safety switch touches the micro switch to start the motor, and the gear box decelerates and the eccentric mechanism drives the cutting mechanism to realize the trimming of lawns and branches. For example, the patent No. 01257686.7 disclosed in the Chinese patent literature "an electric pruning shear" and the patent No. 95222327.9 "double-insulated electric pruning shears" are all pruning shears with double safety switches, which provide a guarantee for people's safe operation. , but most of the functions are single, and the operation mode is irreversible. Also have the patent No. 00240748.5 "environmentally friendly multi-purpose lawn mower", this lawn mower is equipped with traveling wheels at the bottom of the frame, and pushes the extension handle of the walking wheels forward. This mechanism is generally used as a lawn mower for pasture harvesting. If the lawn needs to be trimmed, a mowing tool needs to be installed on the rotating shaft protruding downwards. Its extended handle and walking wheels only play the function of pushing the host, and cannot be disassembled. The handle must cooperate with the application, and the lack of one cannot meet the different operation modes required by different occasions, and the application range is limited.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a kind of grass-cutting pruning shears that can adopt different operation modes according to different application occasions, and can be operated separately or combined as a whole.

The technical problem of the present invention is solved by the following technical solutions: a kind of lawn-cutting pruning shears, which includes a host, the host has a casing with a handle, and the casing is equipped with a rechargeable power supply connected by wires, a normally open first micro Dynamic switch, motor, hinged reset first switch button and automatic reset first self-locking push button to realize the on-off of the normally open first micro switch, the output of the motor is driven by the gear box through the eccentric mechanism and is located The shearing mechanism consisting of fixed blades and movable blades between the blade pressing plates, as well as the wheel assembly at the bottom of the casing, is also provided with an extended handle, which is characterized by:

a. There is also a pair of casing pole pieces in the casing, one of which is connected to the motor with a wire, and the other is connected to the power supply with a wire, and the push-type switch pressure rod is pushed by the switch pressure rod to realize the disconnection. Open normally closed second micro switch;

b. The wheel assembly includes a base, a wheel seat connected to the base, and wheels on both sides of the wheel seat, which are detachably connected to the bottom of the casing through the base. The end surface of the wheel seat is provided with a pair of casing A pair of pole pieces of the locating piece that are in contact with each other, a locating pin that interferes with the switch lever and is reset by a spring is set between the pole pieces of the pair of locating pieces, and a locating piece with multiple indexing grooves is also provided in the wheel seat ;

c. The extended handle is detachably connected to the wheel seat of the wheel assembly, and the fixed block with multiple indexing grooves on the handle is inserted into the positioning piece with multiple indexing grooves. The reset button and the lock are locked, and at the same time, the extension handle is provided with a hinged reset second switch button, an automatic reset second self-locking push button and a normally open third micro switch. Connect the pole piece of the fixed block that conflicts with the pole piece of the positioning piece in the wheel assembly, position the pole piece of the fixed block and push the fixed cover of the positioning pin in the wheel assembly to buckle and connect with the fixed block to form the third micro switch and the motor electrical circuit.

The rechargeable power supply adopts a lithium battery as a power supply, and a charging jack and an indicator light for displaying charging status are provided at the end of the handle of the casing.

The hinged reset type first switch button is hinged at one end with the casing, and is reset by a spring; the automatic reset type first self-locking push button is composed of an elastic plate connected to itself and a baffle connected to the casing reset.

The gear box is a two-stage gear reduction mechanism.

The eccentric mechanism includes an eccentric wheel arranged on the gear shaft of the output terminal of the gearbox, and an eccentric wheel running track arranged on the movable blade. The running track of the eccentric wheel is an oblong structure, and the long axis of the track is along the horizontal direction layout or layout in vertical orientation.

The cutting mechanism includes interchangeable grass cutting blades for transverse cutting or pruning blades for longitudinal cutting.

The detachable connection between the wheel assembly and the bottom of the casing means that matching grooves and convex lines are respectively provided on the two outer sides of the bottom of the casing and the two inner sides of the base of the wheel assembly, and at the same time, there are respectively provided on the grooves and convex lines. Matching convex buckles and concave buckles, the concave-convex buckles form a connected locking structure.

The extended handle includes a curved handle, an upper rod, a coupling sleeve, a lock nut and a curved lower rod, a hinged reset type second switch button, an automatic reset type second self-locking push button and a normally open third micro switch They are respectively arranged on the upper and lower side of the curved handle and in the inner cavity; the end of the curved lower rod is provided with a fixed block with multiple indexing grooves, and the extended section of the fixed block is provided with a fixed block pole piece positioned by a fixed cover. Also be provided with locking extension handle and the wheel seat in the wheel assembly, the button of spring return and the lock catch on the type lower bar, correspondingly be provided with the buckle groove of insertion lock catch in the wheel seat of the wheel assembly.

The plurality of indexing grooves of the positioning piece on the wheel assembly and the fixed block on the extension handle are 8 equally divided grooves.

Compared with the prior art, it has the following advantages: ① The present invention is composed of three major parts: main engine, wheel assembly and extension handle, and has three application modes: the application of hand-held main engine alone, the combined application of hand-held main engine and wheel assembly, and the main engine plus wheels. The combined application of the component and the extension handle can directly operate the motor on the extension handle, which increases the convenience of use; a variety of application modes expand the application range, and users can disassemble and assemble by themselves according to different occasions and purposes; ②The power supply uses lithium batteries , rechargeable, in line with environmental protection requirements; ③The cutting mechanism is interchangeable grass cutting blades and pruning blades, one machine with multiple functions; ④Double-button safety switch, to prevent the operator from accidentally touching the switch and causing injury accidents, good safety; ⑤ There are 8 indexing slots for the combination of the extended handle and the wheel assembly, and there is a connection state at every 45° angle, allowing the user to choose.

Description of drawings

Fig. 1 is a schematic diagram of the integrated structure of the present invention including three major components including a main engine, a wheel assembly and an extension handle.

Fig. 2 is a schematic diagram of the structure of the main unit with half of the casing removed.

Figure 3 is an outline drawing of the host components.

Figure 4 is a top view of the wheel assembly.

Fig. 5 is a B-B sectional view of Fig. 4 .

Figure 6 is an outline view of the extended handle.

FIG. 7 is a partially enlarged view of point C in FIG. 6 .

Fig. 8 is a partial enlarged view of A in Fig. 1 (the joint part of the main engine, the wheel assembly, and the extended handle).

Detailed ways

The embodiments of the present invention will be described in detail below in conjunction with the above-mentioned drawings.

As shown in Figures 1 to 8, in the figure 1-host, 11-casing, 12-power supply, 13-the first micro switch, 14-the first self-locking push button, 15-elastic plate, 16-baffle plate, 17-motor, 18-gear box, 19-shear mechanism, 20-blade pressure plate, 21-switch pressure rod, 22-shell pole piece, 23-second micro switch, 24-spring, 25-first switch Button, 26-rubber skin, 27-top cover, 28-buckle, 29-groove;

3-wheel assembly, 31-wheel seat, 32-wheel, 33-positioning piece pole piece, 34-base, 35-positioning piece, 36-location pin, 37-spring, 38-convex strip, 39-concave buckle;

5-extended handle, 51-curved handle, 52-second switch button, 53-second self-locking push button, 54-upper rod, 55-coupling sleeve, 56-lock nut, 57-curved lower rod, 58 -button, 59-lock buckle, 60-fixed block, 61-fixed block pole piece, 62-fixed cover.

The grass-cutting pruning shears, as shown in Figure 1, are made up of three major parts: a main frame 1, a wheel assembly 3, and an extension handle 5, which are detachably connected to each other.

As shown in Figures 2 to 3, the main engine 1 has a casing 11 with a handle. The casing is closed by two halves and positioned with a peripheral seam and fastened together with self-tapping screws. Rubber skins 26 are glued on and below the handle. The handle feels good when pinched, and the head is provided with a decorative top cover 27 . Inside the casing cavity is a rechargeable lithium battery, a normally open first micro switch 13 and a motor 17 connected by wires as a power supply 12, and the rechargeable lithium battery is provided with a charging jack on the end surface of the casing handle and displays the charging status indicator light (not shown in the figure). The double safety switch that realizes the on-off of the first microswitch 13 of the normally open type has a hinged reset type first switch button 25 and an automatic reset type first self-locking push button 14, and the first switch button is installed on the lower side of the handle. The casing is hinged and reset is realized by a spring 24; the first self-locking push button 14 is push-type and is arranged on the upper side of the handle, and the reset depends on the elastic plate 15 connected with itself and the baffle 16 connected with the casing. , the first self-locking push button is against the first switch button, even if the operator accidentally touches the first switch button, the first micro switch cannot be closed, which plays a role of safety protection, only when the first self-locking push button is pushed After the button moved forward, after the top touch of the first self-locking push button was released to the first switch button, pressing the first switch button now touched the first micro switch to make it closed, and the circuit was connected to the motor 17 to start.

The output power of the motor 17 is driven by the gear box 18 through an eccentric mechanism (not shown in the figure) to drive the shearing mechanism 19 located between the gear box 18 and the blade pressing plate 20 to act. The gearbox is a two-stage gear reduction mechanism. Shear mechanism is made up of fixed blade and moving blade, and fixed blade is positioned and orientedly connected (not shown) with 4 pin shafts on the corresponding gear casing of 4 breaches on both sides of itself (not shown in the figure), is pressed by blade pressing plate 20. The eccentric mechanism means that an eccentric wheel is provided on the terminal gear shaft output by the gearbox, and an eccentric wheel running track (not shown in the figure) is set on the moving blade. Directional layout or vertical layout, when shearing mechanism 19 is the mowing blade of transverse shearing, the major axis of eccentric wheel running track is laid out along horizontal direction, and moving blade connects fixed blade with bearing pin and makes left and right relative fixed blade. Oscillating shearing; when the shearing mechanism 19 is a pruning blade for longitudinal shearing, the long axis of the eccentric wheel running track is laid out along the vertical direction, and the moving blade is connected with the pin of the fixed blade with a chute and moves forward and backward relative to the fixed blade. The two can be interchanged, disassembled and installed as required. In order to prevent the shearing blades from cutting people when they are not in working condition, a sheath (not shown) is set on the fixed and moving blades. The blade pressing plate 20 is buckled and connected with the bottom of the casing 11 by a buckle.

A pair of casing pole pieces 22 are also arranged in the casing 11. One of the casing pole pieces is connected to the motor with a wire, and the other is connected to the lithium battery with a wire. The push-type switch lever 21 is embedded in the casing groove to push the The switch pressing bar realizes disconnecting the normally closed second microswitch 23 .

Wheel assembly 3 is shown in Figure 4～5, comprises a base 34, wheel seat 31 and wheel 32 etc. to form, base 34 and the lower half of wheel seat 31 integral injection molding, the upper half of wheel seat 31 is to be assembled with internal parts Then cover and connect with screws. Wheel 32 points are located at the wheel base both sides. The wheel assembly is located at the bottom of the casing for detachable connection. The detachable connection of the wheel assembly 3 relative to the host 1 is that symmetrical grooves 29 are provided on both outer sides of the bottom of the casing 11. The groove is matched with the symmetrical convex strip 38, and the convex strip is pushed into the structure along the groove to form the structure that the wheel base hugs the casing. In order to have a locking function after the two are connected, a convex buckle 28 is provided in the groove 29 of the casing, and a concave buckle 39 matching the convex buckle is provided in the raised strip 38 of the base. The concave and convex buckles are interlocked by the elasticity of the material. The end face of the wheel seat 31 of the wheel assembly is provided with a pair of pole piece 33 of the positioning piece that protrudes and conflicts with a pair of pole piece 22 of the casing inside the casing. The locating pin 36 reset by the spring 37 on the 21, although this locating pin collides on the switch pressure bar, when the locating pin is not subjected to external force to push the normally closed second microswitch 23, the second microswitch is still in the position of In the normally closed state, only when the positioning pin 36 is subjected to an external force and pushes the switch pressure rod 21, the second micro switch is touched by the switch pressure rod, and the normally closed point is disengaged, and the main machine electrical circuit is cut off, so that the main machine will not run. A positioning piece 35 with 8 equally divided indexing grooves is also provided in the wheel seat 31 for connecting the extension handle 5 . The installation of parts such as locator 35, locator pin 36, spring 37, locator pole piece 33 in the wheel base 31 must be covered before the upper half of the wheel base is fixed.

As shown in Figures 6-7, the extension handle 5 is detachably connected in the wheel seat 31 of the wheel assembly, and includes a hollow tubular bent handle 51, an upper rod 54, a coupling sleeve 55, a lock nut 56 and a curved lower rod 57, The second switch button 52 of the hinge reset type, the second self-locking push button 53 of the automatic reset type and the third microswitch of the normally open type are also provided at the bent handle position; The lock push button and the third microswitch have the same structure as that on the main engine; the fixed block 60 with 8 equally divided indexing grooves is glued to the end of the curved lower rod 57, and the extension section extending outwards from the fixed block is provided with The circular fixed block pole piece 61, the third micro switch is connected to the fixed block pole piece through the wire, and is fastened and positioned by the fixed cover 62. The fixed block is plugged and connected with the positioning piece in the wheel seat, and there are 8 pieces Connection angle, one every 45°. The locking after the extended handle 5 and the wheel seat 31 are plugged and connected is realized by the button 58 and the lock catch 59 arranged on the curved lower bar. The button and the lock catch are integrated and reset by a spring. 31 is provided with an annular buckle groove (not shown in the figure) for inserting the lock buckle 59 . When the extended handle 5 is once inserted into the wheel seat 31, as shown in Figure 8, the fixed block pole piece 61 on the extended handle 5 just in time conflicts with the positioning piece pole piece 33 of the wheel assembly 3, forming a circuit conduction, and fixing The cover 62 is also pressed against the positioning pin 36, so that the positioning pin is simultaneously pushed on the switch pressure rod 21, and the switch pressure rod then touches the second micro switch 3 to disengage from the normally closed point, cutting off the main engine 1 electrical circuit, at this time The first switch button 25 on the host is ineffective, and the power is passed through the third micro switch, the fixed block pole piece 61, the positioning piece pole piece 33, and the casing pole piece 22 by the second switch button 52 on the curved handle of the extension handle 5. , and then form an electric circuit through the power supply 12 to the motor 17. When the extended handle, the wheel assembly and the main frame are used in conjunction with the pruning shears, as long as the second switch button and the second self-locking push button on the curved handle are manipulated, the motor can be started to work.

Claims (9)

1. A kind of lawn-cutting pruning shears, which comprises a host (1), the host has a casing (11) with a handle, the casing is provided with a rechargeable power supply (12) connected by wires, a normally open first micro Actuated switch (13), motor (17), the hinged reset type first switch button (25) and the first self-locking push button (14) of automatic reset type to realize the on-off of the normally open type first micro switch, the motor output is controlled by The gear box (18) driven by the eccentric mechanism is located between the gear box (18) and the blade pressing plate (20) and is composed of a fixed blade and a moving blade (19), and a wheel assembly ( 3), also be provided with extension handle (5), it is characterized in that: a. The casing (11) is also provided with a pair of casing pole pieces (22). One of the casing pole pieces is connected to the motor (17) with a wire, and the other is connected to the power supply (12) with a wire. Push-type A switch pressure rod (21) and a normally closed second micro switch (23) that is pushed by the switch pressure rod to realize disconnection; b. The wheel assembly (3) includes a base (34), a wheel seat (31) connected to the base, and wheels (32) on both sides of the wheel seat, which are detachably connected to the bottom of the casing through the base. The end face of the seat is provided with a pair of locator pole pieces (33) protruding and contradicting a pair of casing pole pieces (22), and a pair of locator pole pieces is provided with a pair of spacer pole pieces that interfere with the switch lever (21). The locating pin (36) that the spring (37) resets, is also provided with the locating member (35) that has a plurality of indexing grooves in the wheel seat (31); c. The extension handle (5) is detachably connected to the wheel seat (31) of the wheel assembly (3), through the fixed block (60) with multiple indexing grooves on the handle and the fixed block (60) with multiple indexing slots The locating parts (35) of the slots are plugged together, and locked with a reset button (58) and a lock catch (59) after plugging, and the extension handle (5) is provided with a hinged reset type second switch button (52), The second self-locking push button (53) of the automatic reset type and the third microswitch of the normally open type, the third microswitch is connected to the fixing pole piece (33) of the positioning piece (33) in the wheel assembly (3) through a wire connection. The block pole piece (61), the fixed cover (62) of positioning and fixing the block pole piece and pushing the positioning pin in the wheel assembly is buckled and connected with the fixed block to form the electric circuit of the third micro switch and the motor. 2. The lawn-cutting and pruning shears according to claim 1, characterized in that the rechargeable power supply (12) adopts a lithium battery as a power supply, and a charging jack and an indication of a charging state are provided at the end of the handle of the casing lamp. 3. The lawn-cutting pruning shears according to claim 1, characterized in that one end of the first switch button (25) of the hinged reset type is hinged to the casing (11), and is reset by a spring (24); The self-resetting first self-locking push button (14) is reset by the elastic plate (15) integrated with itself and the baffle plate (16) integrated with the casing. 4. The grass-cutting and pruning shears according to claim 1, characterized in that said gear box (18) is a two-stage gear reduction mechanism. 5. The lawn-cutting pruning shears according to claim 1, characterized in that said eccentric mechanism comprises an eccentric wheel arranged on the gear shaft of the output terminal of the gear box (18), and the eccentric wheel arranged on the movable blade runs The track, the running track of the eccentric wheel is an oblong structure, and the long axis of the track is arranged along the horizontal direction or the vertical direction. 6. The grass-cutting pruning shears according to claim 1, characterized in that said cutting mechanism (19) comprises interchangeable grass-cutting blades for transverse cutting or pruning blades for longitudinal cutting. 7. The lawn and pruning shears according to claim 1, characterized in that the detachable connection between the wheel assembly (3) and the bottom of the casing (11) is at the two outer sides of the bottom of the casing and the two sides of the base of the wheel assembly. The inner side is respectively provided with matching grooves (29) and convex strips (38), and at the same time, matching convex buttons (28) and concave buttons (39) are respectively provided on the grooves and convex strips. locking structure. 8. The grass-cutting pruning shears according to claim 1, characterized in that the extension handle (5) includes a curved handle (51), an upper rod (54), a coupling sleeve (55), a lock nut (56 ) and the curved lower bar (57), the second switch button (52) of the hinged reset type, the second self-locking push button (53) of the automatic reset type and the third micro switch of the normally open type are respectively located on the curved handle (51) Upper and lower side positions and inner cavity; the end of the curved lower rod (57) is provided with a fixed block (60) with multiple indexing grooves, and the fixed block extension section is provided with a fixed block positioned by a fixed cover (62) Pole piece (61), also be provided with the button (58) that locks extension handle (5) and the wheel seat (31) in the wheel assembly (3), the button (58) of spring return and the lock catch (59) on the curved lower bar (57). ), correspondingly in the wheel seat (31) of the wheel assembly (3), be provided with the buckle groove of plug-in lock catch (59). 9. The grass-cutting and pruning shears according to any one of claims 1-8, characterized in that the positioning piece (35) on the wheel assembly (3) and the fixed block (60) on the extension handle (5) ) The multiple indexing grooves are 8 equally divided grooves.

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