CN215903553U

CN215903553U - Wool scissors

Info

Publication number: CN215903553U
Application number: CN202121465840.7U
Authority: CN
Inventors: 秦卫华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-02-25
Anticipated expiration: 2031-06-29

Abstract

The invention discloses a pair of wool scissors, aiming at overcoming the problem that a gearbox is easy to generate larger vibration and noise in the prior art, the pair of wool scissors comprises a shell, wherein a fixed blade and a motor are fixedly arranged on the shell, the output end of the motor is in transmission connection with a cam, a driven part is arranged on the cam and is also hinged on the shell, a movable blade is arranged on the driven part, a gear reduction mechanism comprises a first gear and a second gear, the motor comprises a motor, a first gear, a second gear, a cam, a third gear and a fourth gear, wherein the first gear is fixedly arranged on the output end of the motor, the first gear is meshed with the second gear, the fourth gear is rotatably arranged on a front cover, the cam is fixedly arranged on the fourth gear, the fourth gear is meshed with the third gear, a rotating shaft is formed on the front cover, the second gear and the third gear are sleeved on the rotating shaft, the third gear is fixedly arranged on the second gear, and the end cover axially fixes the second gear and the third gear on the rotating shaft.

Description

Wool scissors

Technical Field

The invention belongs to animal machinery, in particular to a pair of wool scissors.

Background

Wool shears are electric tools used for trimming sheep, cashmere goats or fur-dense animals. A motor is arranged in a casing of the wool shears, the rotation of the motor is adjusted through a gearbox, and the rotation output by the gearbox is converted into left-right swing through a special conversion mechanism and then is transmitted to a pressing claw on the casing. The upper tooth blade on the machine shell is driven by the pressing claw to be matched with the fixed combing teeth (also called as the lower tooth blade) to do shearing motion, so that the wool is sheared.

However, the prior art is not perfect, the structural design of the gearbox is not reasonable, and the gearbox is easy to generate larger vibration and noise in the use process of the wool scissors, so that the comfort in the use process is reduced.

Summary of the invention

In order to overcome the defects and problems in the prior art, the invention provides the pair of wool scissors.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pair of wool scissors comprises a shell, wherein a fixed blade and a motor are fixedly arranged on the shell, a cam is connected to the output end of the motor in a transmission manner, a driven part is arranged on the cam, the driven part is also hinged to the shell, a movable blade is arranged on the driven part, the motor can drive the movable blade to open and close on the fixed blade in a reciprocating manner through the cam and the driven part, the shell comprises a front cover and an end cover fixedly arranged on the front cover, a gear reduction mechanism is arranged in the front cover and comprises a first gear, a second gear, a third gear and a fourth gear, the first gear is fixedly arranged on the output end of the motor, the first gear is meshed with the second gear, the fourth gear is rotatably arranged on the front cover, the cam is fixedly arranged on the fourth gear, the fourth gear is meshed with the third gear, a rotating shaft is formed on the front cover, the second gear and the third gear are sleeved on the rotating shaft, the third gear is fixedly arranged on the second gear, and the end cover axially fixes the second gear and the third gear on the rotating shaft.

Preferably, the gear reduction mechanism further comprises a transmission shaft, the transmission shaft is rotatably arranged on the front cover, the fourth gear is rotatably arranged on the front cover through the transmission shaft, and the fourth gear and the cam are fixedly arranged together through the transmission shaft.

Preferably, the transmission shaft is rotatably disposed on the front cover through a bearing.

Preferably, the driven member comprises a rocker, a pressing rod and a pressing claw, the rocker is hinged to the shell, the pressing rod is fixedly arranged on the rocker, the pressing claw is fixedly arranged on the pressing rod, the pressing claw is inserted into the movable blade, the shell is in threaded connection with a knob, the pressing rod is arranged between the knob and the movable blade, if the knob rotates on the shell, the pressing claw can be loosened on the movable blade, a first slot is formed in the pressing rod, the pressing claw is inserted into the first slot, a positioning part is fixedly arranged on the pressing rod, the positioning part is provided with a key block, a key slot is formed in the pressing claw, and the key block is arranged in the key slot.

Preferably, the pressing claw further comprises an elastic piece, the elastic piece is fixedly arranged on the pressing rod, a first through hole is formed in the elastic piece, and the pressing claw penetrates through the first through hole.

Preferably, a rod head is formed on the pressure rod, a first connecting hole is formed in the elastic piece, the rod head is inserted into the first connecting hole, a second connecting hole is formed in the rod head, a first screw is connected into the first connecting hole and the second connecting hole, and the elastic piece is fixedly arranged on the rod head through the first screw.

Preferably, the positioning piece is fixedly arranged on the pressure rod through an elastic piece, the elastic piece is provided with a spacing avoiding groove, and the key block and the key groove are respectively arranged in the spacing avoiding groove.

Preferably, the elastic part is provided with a third connecting hole, the positioning part is provided with a fourth connecting hole, and the third connecting hole and the fourth connecting hole are internally connected with a second screw.

Preferably, the rocker is formed with a leaf spring that urges the plunger to remain in abutment with the knob.

Preferably, the pair of pressing claws, the pair of first slots and the pair of key blocks are provided, one pressing claw is inserted into one first slot, the other pressing claw is inserted into the other first slot, one key block is arranged in the key slot of one pressing claw, and the other key block is arranged in the key slot of the other pressing claw.

Compared with the prior art, the invention has the outstanding and beneficial technical effects that:

(1) in the wool shear, the output end of the motor drives the cam through the first gear, the second gear, the third gear and the fourth gear, the end cover is used for axially fixing the second gear and the third gear on the rotating shaft, the second gear and the third gear are prevented from shaking on the rotating shaft, the driving stability of the gear speed reducing mechanism is improved, the first gear is meshed with the second gear, the fourth gear is meshed with the third gear, and the second gear and the fourth gear are fixed together, so that the structure compactness of the gear speed reducing mechanism is improved.

(2) In the invention, a user can adjust the knob by bare hands without using tools, if the pressing claw is loosened on the movable blade, the movable blade can be detached from the wool shear, so that the movable blade and the fixed blade can be cleaned conveniently, in addition, the movable blade can be replaced conveniently, in addition, the tightness of the connection of the pressing claw on the movable blade can be adjusted by adjusting the knob, and the problem of unsmooth movement of the movable blade when the movable blade is opened and closed on the fixed blade is avoided.

(3) In the invention, the pressing claw is positioned on the pressing rod by the first slot, and the pressing claw is axially positioned in the first slot by the key block, so that the matching firmness of the pressing claw and the pressing rod is improved.

(4) In the invention, the pressing claw penetrates through the first through hole, the elastic piece plays a role in protecting the pressing claw, and if the pressing claw swings on the shell in a reciprocating mode, the elastic piece directly touches the shell and plays a role in buffering and damping, so that the pressing claw is prevented from being in hard collision with the shell.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional structure of the present invention;

FIG. 3 is one of the schematic views of the explosive structure created by the present invention;

FIG. 4 is a second schematic diagram of the explosion structure created by the present invention;

FIG. 5 is a schematic view of the structure of the elastic member of the present invention;

in the figure: 1-machine shell, 2-elastic piece, 3-positioning piece, 4-gear speed reducing mechanism, 5-cam, 6-shaft sleeve, 7-driven piece, 8-movable blade, 91-fixed blade, 92-knob, 93-first screw, 94-second screw, 95-motor, 96-bearing, 11-front cover, 12-end cover, 13-rear cover, 111-threaded pipe, 112-rotating shaft, 21-first through hole, 22-first connecting hole, 23-third connecting hole, 24-avoiding groove, 31-key block, 32-fourth connecting hole, 41-first gear, 42-second gear, 43-third gear, 44-fourth gear, 45-driving shaft, 51-eccentric shaft, 71-rocker, 6-shaft sleeve, 7-driven piece, 8-movable blade, 91-fixed blade, 92-knob, 93-second screw, 95-motor, 96-bearing, 11-front cover, 12-end cover, 13-rear cover, 111-threaded pipe, 112-rotating shaft, 21-first through hole, 22-first connecting hole, 23-third connecting hole, 24-avoiding groove, 31-key block, 32-fourth connecting hole, 41-first gear, 42-second gear, 43-third gear, 44-fourth gear, 45-transmission shaft, rocker, 51-eccentric shaft, 71-rocker, and rocker, and rocker, 72-pressure rod, 73-pressure claw, 81-second slot, 711-steel plate spring, 721-first slot, 722-rod head, 723-second connecting hole, 724-sliding groove and 731-key groove.

Detailed Description

In order to facilitate the understanding of those skilled in the art, the invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 5, a pair of wool shears comprises a housing 1, wherein the housing 1 is hollow, a fixed blade 91 is fixedly arranged on the housing 1, the fixed blade 91 can be fixed at the front end of the housing 1 through a bolt, a movable blade 8 which can slide is arranged on the fixed blade 91, and the movable blade 8 can swing on the fixed blade 91 in a reciprocating manner. If the movable blade 8 swings back and forth on the fixed blade 91, the movable blade 8 and the fixed blade 91 open and close with each other, and wool can be cut between the movable blade 8 and the fixed blade 91 which open and close with each other when the wool shear is used.

Still fixedly on the casing 1 be provided with motor 95, be provided with gear reduction mechanism 4 on motor 95's the output, be provided with cam 5 on gear reduction mechanism 4, gear reduction mechanism 4 is used for reducing the rotational speed and improves the effect of moment of torsion, avoids this wool to cut the dead problem of emergence card when cuting wool. When the motor 95 is operated, the output end of the motor 95 drives the cam 5 to rotate through the gear reduction mechanism 4. The cam 5 is provided with a driven piece 7, the driven piece 7 is also hinged on the machine shell 1, and if the cam 5 rotates, the cam 5 drives the driven piece 7 to swing on the machine shell 1 in a reciprocating mode. The driven member 7 is provided with a movable blade 8, if the driven member 7 swings on the housing 1 in a reciprocating manner, the driven member 7 drives the movable blade 8 to open and close on the fixed blade 91 in a reciprocating manner, so that the motor 95 can drive the movable blade 8 to open and close on the fixed blade 91 in a reciprocating manner through the cam 5 and the driven member 7. In the present embodiment, the housing 1, the cam 5 and the follower 7 constitute a cam mechanism, and the cam mechanism functions to convert the rotation of the output end of the motor 95 into the reciprocating swing of the movable blade 8 on the fixed blade 91.

Specifically, the front end of the casing 1 is provided with an opening, the motor 95 and the cam 5 are respectively arranged in the casing 1, the driven piece penetrates through the opening of the casing 1, the casing 1 plays a role in protecting the motor 95 and the cam 5, and the working reliability of the motor 95 is improved.

The casing 1 comprises a front cover 11 and an end cover 12 fixedly arranged on the front cover 11, wherein the front cover 11 is hollow, and the end cover 12 can be fixed in the front cover 11 through bolts. The housing 1 further includes a rear cover 13, the rear cover 13 is fixedly disposed on the front cover 11, the end cover 12 is disposed between the front cover 11 and the rear cover 13, and the motor 95 is fixedly disposed in the rear cover 13. The opening is opened at the front end of the front cover 11, and the fixed blade 91 is fixedly arranged at the front end of the front cover 11.

A rotating shaft 112 is formed in the front cover 11, and the whole structure of the rotating shaft 112 is a round bar shape. The gear reduction mechanism 4 includes a first gear 41, a second gear 42, a third gear 43, and a fourth gear 44, the number of teeth of the first gear 41 is smaller than the number of teeth of the second gear 42, and the number of teeth of the third gear 43 is smaller than the number of teeth of the fourth gear 44. The first gear 41 is fixedly provided on the output end of the motor 95, and the first gear 41 is integrally formed on the output end of the motor 95 in particular. The second gear 42 and the third gear 43 are sleeved on the rotating shaft 112, the second gear 42 and the third gear 43 are fixedly arranged together, the second gear 42 and the third gear 43 can rotate around the rotating shaft 112 together, and the second gear 42 is meshed with the first gear 41.

In the invention, the output end of the motor 95 drives the cam 5 through the first gear 41, the second gear 42, the third gear 43 and the fourth gear 44, the end cover 12 is used for axially fixing the second gear 42 and the third gear 43 on the rotating shaft 112, so that the second gear 42 and the third gear 43 are prevented from swinging on the rotating shaft 112, and the driving stability of the gear reduction mechanism 4 is improved.

The gear reduction mechanism 4 comprises a first gear 41, a second gear 42, a third gear 43 and a fourth gear 44, the first gear 41 is fixedly arranged on the output end of the motor 95, the first gear 41 is meshed with the second gear 42, the fourth gear 44 is rotatably arranged on the front cover 11, the cam 5 is fixedly arranged on the fourth gear 44, the fourth gear 44 is meshed with the third gear 43, a rotating shaft 112 is formed on the front cover 11, the second gear 42 and the third gear 43 are sleeved on the rotating shaft 112, the third gear 43 is fixedly arranged on the second gear 42, and the end cover 12 axially fixes the second gear 42 and the third gear 43 on the rotating shaft 112.

Specifically, the first gear 41 is integrally formed on the output end of the motor 95, and the second gear 42 and the third gear 43 are also integrally formed together, so that the number of parts is reduced, and the production cost is reduced. The end cap 12 is provided at one end of the rotation shaft 112, one ends of the second gear 42 and the third gear 43 abut against the end cap 12, and the other ends of the second gear 42 and the third gear 43 abut against the front cover 11.

The gear reduction mechanism 4 further comprises a transmission shaft 45, the transmission shaft 45 is rotatably arranged on the front cover 11, the fourth gear 44 is rotatably arranged on the front cover 11 through the transmission shaft 45, and the fourth gear 44 and the cam 5 are fixedly arranged together through the transmission shaft 45.

Specifically, the fourth gear 44 is interference-fitted to one end of the transmission shaft 45, and the cam 5 is fixedly provided to the other end of the transmission shaft 45.

The transmission shaft 45 is rotatably provided in the front cover 11 through a bearing 96. Bearing 96 interference fit is in protecgulum 11, and transmission shaft 45 interference fit is on bearing 96, and fourth gear 44 interference fit is on transmission shaft 45, and the assembly structure is retrencied, the assembly of being convenient for.

The driven member 7 comprises a rocker 71, a pressure lever 72 and a pressure claw 73, the rocker 71 is hinged on the machine shell 1, the rocker 71 can swing on the machine shell 1 in a reciprocating manner, the pressure lever 72 is fixedly arranged on the rocker 71, the pressure claw 73 is fixedly arranged on the pressure lever 72, the pressure claw 73 is inserted on the movable blade 8, the machine shell 1 is in threaded connection with a knob 92, the pressure lever 72 is arranged between the knob 92 and the movable blade 8, the pressure claw 73 is also arranged between the knob 92 and the movable blade 8, the movable blade 8 is arranged between the pressure claw 73 and the fixed blade 91, and if the knob 92 rotates on the machine shell 1, the pressure claw 73 can be loosened on the movable blade 8.

Specifically, the knob 92 has a cylindrical overall structure, and one end of the pressing rod 72 abuts on the knob 92. When the knob 92 is rotated on the housing 1, the knob 92 is close to or away from the movable blade 8, so as to adjust the tightness of the fit between the pressing claw 73 between the knob 92 and the movable blade 8. The casing 1 is formed with a screw tube 111, and the knob 92 is screw-coupled to the screw tube 111.

In the invention, a user can adjust the knob 92 by bare hands without using tools, if the pressing claw 73 is loosened on the movable blade 8, the movable blade 8 can be detached from the wool shear, the movable blade 8 and the fixed blade 91 are convenient to clean, in addition, the movable blade 8 is also convenient to replace, in addition, the tightness of the connection of the pressing claw 73 on the movable blade 8 can be adjusted by adjusting the knob 92, and the problem that the movable blade 8 moves unsmoothly when reciprocating opening and closing on the fixed blade 91 is avoided.

The pressing rod 72 is provided with a first slot 721, the pressing claw 73 is inserted into the first slot 721, the positioning member 3 is fixedly arranged on the pressing rod 72, the key block 31 is formed on the positioning member 3, the pressing claw 73 is provided with a key slot 731, and the key block 31 is arranged in the key slot 731.

In the invention, the first slot 721 positions the pressing claw 73 on the pressing rod 72, and the key block 31 axially positions the pressing claw 73 in the first slot 721, so that the matching firmness of the pressing claw 73 and the pressing rod 72 is improved, and the rocker 71, the pressing rod 72 and the pressing claw 73 adopt a split structural design, and only the pressing claw 73 needs to be replaced when the movable blade 8 with different specifications needs to be matched, so that the invention has the advantages of firm matching, conformity with the concept of modular design and convenience for meeting the use requirements of different users.

Specifically, the cross section of the first slot 721 is circular, one end of the pressing claw 73 is matched with the first slot 721, and one end of the pressing claw 73 is inserted into the first slot 721. A key groove 731 is provided in the side of the pressing claw 73, a key block 31 is formed at one end of the positioning member 3, the key block 31 is fitted in the key groove 731, and the key block 31 axially fixes the pressing claw 73 in the first insertion groove 721.

The pressing claws 73 are paired, the first slots 721 are also paired, the key blocks 31 are also paired, one pressing claw 73 is inserted into one first slot 721, the other pressing claw 73 is inserted into the other first slot 721, one key block 31 is arranged in the key slot 731 of one pressing claw 73, and the other key block 31 is arranged in the key slot 731 of the other pressing claw 73.

Specifically, a pair of pressing claws 73 is inserted into the same moving blade 8, and the pair of pressing claws 73 plays a role in positioning the moving blade 8 at multiple points, so that the positioning effect of the pressing claws 73 on the moving blade 8 is improved. A pair of first slots 721 are formed on the same side of the pressing rod 72, and a pair of key blocks 31 are formed at both ends of the positioning member 3.

The movable blade 8 is provided with a second slot 81, and the pressing claw 73 is inserted into the second slot 81. The overall structure of the second slot 81 is strip-shaped, and the other end of the pressing claw 73 is inserted into the second slot 81, so that the problem that the assembly cannot be carried out due to the size error between the pressing claw 73 and the second slot 81 is avoided.

Still include elastic component 3, elastic component 3 is fixed to be set up on depression bar 72, has seted up first through-hole 21 on elastic component 3, presses claw 73 to wear to locate first through-hole 21, and elastic component 3 plays the guard action to pressing claw 73, and if pressing claw 73 when reciprocating swing on casing 1 elastic component 3 directly touches on casing 1, elastic component 3 plays the absorbing effect of buffering, avoids pressing claw 73 and casing 1 to take place hard collision.

Specifically, the first through holes 21 are a pair, one pressing claw 73 is disposed through one first through hole 21, and the other pressing claw 73 is disposed through the other first through hole 21.

The press rod 72 is provided with a rod head 722, the elastic member 3 is provided with a first connecting hole 22, the rod head 722 is inserted into the first connecting hole 22, the rod head 722 is provided with a second connecting hole 723, the first connecting hole 22 and the second connecting hole 723 are connected with a first screw 93, the elastic member 3 is fixedly arranged on the rod head 722 by the first screw 93, the assembling structure is simple, and the elastic member 3 and the press rod 72 can be conveniently disassembled.

Specifically, the head 722 is provided between a pair of first slots 721, and a screw hole is opened at one end of the head 722. The first connection hole 22 is a counter-sunk hole, and the second connection hole 723 is a threaded hole.

The positioning piece 3 is fixedly arranged on the pressing rod 72 through the elastic piece 3, the elastic piece 3 is provided with the avoiding groove 24, and the key block 31 and the key groove 731 are arranged in the avoiding groove 24, so that the assembling compactness of the positioning piece 3 and the elastic piece 3 on the pressing rod 72 is improved.

Specifically, two clearance grooves 24 are provided, the two clearance grooves 24 are opened on both sides of the elastic member 3, the key groove 731 of one key block 31 and one pressing claw 73 is provided in one clearance groove 24, and the key groove 731 of the other key block 31 and the other pressing claw 73 is provided in the other clearance groove 24.

The elastic part 3 is provided with a third connecting hole 23, the positioning part 3 is provided with a fourth connecting hole 32, and the third connecting hole 23 and the fourth connecting hole 32 are connected with a second screw 94, so that the assembly structure is simplified, and the elastic part 3 and the positioning part 3 can be conveniently disassembled.

Specifically, the third connection hole 23 is a threaded hole, and the fourth connection hole 32 is a through hole.

The overall structure of the pressing claw 73 is in a Y shape, the first end of the pressing claw 73 is inserted into the first slot 721, and the second end and the third end of the pressing claw 73 are inserted onto the movable blade 8, so that the firmness of the connection of the pressing claw 73 to the movable blade 8 is further improved.

The rocker 71 is provided with a steel plate spring 711, the steel plate spring 711 forces the press rod 72 to be abutted against the knob 92, if the knob 92 rotates, the steel plate spring 711 can drive the press claw 73 to be quickly separated from the movable blade 8, the dismounting efficiency of the movable blade 8 and the press claw 73 is improved, and the problem that the press rod 72 and the press claw 73 shake on the knob 92 is avoided.

An eccentric rod is formed on the cam 5, the eccentric rod and the rotation center of the cam 5 are staggered, a sliding groove 724 is formed in the pressure rod 72, and the eccentric rod is inserted in the sliding groove 724. The eccentric shaft 51 is always abutted against the side wall of the sliding groove 724, and the eccentric shaft 51 can drive the pressing rod 72, the pressing claw 73 and the movable blade 8 to reciprocate on the fixed blade 91, so that unnecessary vibration of the movable blade 8 on the fixed blade 91 is avoided.

The eccentric rod is sleeved with a rotatable shaft sleeve 6, the shaft sleeve 6 is arranged in the sliding groove 724, the shaft sleeve 6 can rotate around the eccentric shaft 51, if the eccentric shaft 51 slides in the sliding groove 724, the shaft sleeve 6 rotates on the eccentric shaft 51, rolling friction is generated between the shaft sleeve 6 and the sliding groove 724, friction is reduced, and the smoothness of movement is improved.

The integral structure of the shaft sleeve 6 is a sphere, the cross section of the sliding groove 724 is arc-shaped, and the shaft sleeve 6 is matched in the sliding groove 724, so that the smoothness of movement is further improved.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention shall be covered within the protection scope of the invention.

Claims

1. A pair of wool shears comprises a machine shell (1), wherein a fixed blade (91) and a motor (95) are fixedly arranged on the machine shell (1), a gear reduction mechanism (4) is arranged on an output end of the motor (95), a cam (5) is arranged on the gear reduction mechanism (4), a driven piece (7) is arranged on the cam (5), the driven piece (7) is also hinged on the machine shell (1), a movable blade (8) is arranged on the driven piece (7), the motor (95) can drive the movable blade (8) to open and close on the fixed blade (91) in a reciprocating mode through the cam (5) and the driven piece (7), the wool shears is characterized in that the machine shell (1) comprises a front cover (11) and an end cover (12) fixedly arranged on the front cover (11), the gear reduction mechanism (4) is arranged in the front cover, the gear reduction mechanism (4) comprises a first gear (41), a second gear (42), a third gear (43) and a fourth gear (44), the first gear (41) is fixedly arranged on the output end of the motor, the first gear (41) is meshed with the second gear (42), the fourth gear (44) is rotatably arranged on the front cover (11), the cam (5) is fixedly arranged on the fourth gear (44), the fourth gear (44) is meshed with the third gear (43), a rotating shaft (112) is formed on the front cover (11), the second gear (42) and the third gear (43) are sleeved on the rotating shaft (112), the third gear (43) is fixedly arranged on the second gear (42), and the end cover (12) axially fixes the second gear (42) and the third gear (43) on the rotating shaft (112).

2. A pair of wool shears according to claim 1, wherein the gear reduction mechanism (4) further comprises a transmission shaft (45), the transmission shaft (45) is rotatably arranged on the front cover (11), the fourth gear (44) is rotatably arranged on the front cover (11) through the transmission shaft (45), and the fourth gear (44) and the cam (5) are fixedly arranged together through the transmission shaft (45).

3. A pair of wool shears according to claim 2, wherein the drive shaft (45) is rotatably arranged on the front cover (11) by means of a bearing (96).

4. The wool shears according to claim 1, wherein the driven member (7) comprises a rocker (71), a pressure lever (72) and a pressure claw (73), the rocker (71) is hinged on the machine shell (1), the pressure lever (72) is fixedly arranged on the rocker (71), the pressure claw (73) is fixedly arranged on the pressure lever (72), the pressure claw (73) is inserted on the movable blade (8), the machine shell (1) is in threaded connection with a knob (92), the pressure lever (72) is arranged between the knob (92) and the movable blade (8), if the knob (92) rotates on the machine shell (1), the pressure claw (73) can be loosened on the movable blade (8), the pressure lever (72) is provided with a first slot (721), the pressure claw (73) is inserted in the first slot (721), the pressure lever (72) is fixedly provided with a positioning member (3), the positioning member (3) is provided with a key block (31), the pressing claw (73) is provided with a key groove (731), and the key block (31) is arranged in the key groove (731).

5. A pair of wool shears according to claim 4, further comprising an elastic member (2), wherein the elastic member (2) is fixedly arranged on the pressing rod (72), the elastic member (2) is provided with a first through hole (21), and the pressing claw (73) is arranged in the first through hole (21) in a penetrating manner.

6. A pair of wool shears according to claim 5, wherein the pressing rod (72) is provided with a rod head (722), the elastic member (2) is provided with a first connecting hole (22), the rod head (722) is inserted into the first connecting hole (22), the rod head (722) is provided with a second connecting hole (723), the first connecting hole (22) and the second connecting hole (723) are internally connected with a first screw (93), and the elastic member (2) is fixedly arranged on the rod head (722) by the first screw (93).

7. A pair of wool shears according to claim 5 or 6, wherein the positioning piece (3) is fixedly arranged on the pressing rod (72) through the elastic piece (2), the elastic piece (2) is provided with a spacing groove (24), and the key block (31) and the key groove (731) are respectively arranged in the spacing groove (24).

8. A pair of wool shears according to claim 7, wherein the elastic part (2) is provided with a third connecting hole (23), the positioning part (3) is provided with a fourth connecting hole (32), and the third connecting hole (23) and the fourth connecting hole (32) are internally connected with a second screw (94).

9. A pair of wool shears according to claim 4, wherein the rocker (71) is formed with a leaf spring (711), and the leaf spring (711) forces the press rod (72) to be held against the knob (92).

10. A pair of wool shears according to claim 4, wherein the pressing claws (73) are paired, the first slots (721) are also paired, and the key blocks (31) are also paired, one pressing claw (73) is inserted into one first slot (721), the other pressing claw (73) is inserted into the other first slot (721), one key block (31) is arranged in the key slot (731) of one pressing claw (73), and the other key block (31) is arranged in the key slot (731) of the other pressing claw (73).