Wire cutting automation equipment

Abstract

The present invention discloses an automated wire ring cutting device, including a machine platform, a ring cutting device, a first fixing device, and a second fixing device. The ring cutting device, the first fixing device, and the second fixing device are all arranged on the machine platform. The first fixing device and the second fixing device are respectively located at two ends of the ring cutting device. The active end of the first fixing device extends into the working end of the ring cutting device. The active ends of the ring cutting device, the first fixing device, and the second fixing device are located on the same straight line. The equipment mainly consists of three parts: the ring cutting device, the first fixing device, and the second fixing device. During the operation of the equipment, the wire is inserted into the ring cutting device, and one end of the wire enters the first fixing device, and the other end of the wire cooperates with the second fixing device. The first fixing device works and fixes one end of the wire, and the second fixing device works to fix the other end of the wire. The ring cutting device works to ring cut the wire, thereby completing the entire ring cutting process of the wire.

Description

Technical Field

[0001] The invention relates to the technical field of automated production equipment, and in particular to automated wire ring cutting equipment. Background Art

[0002] Flexible wires need to be injected with plastic for the second time in the mold to complete the silicone layer on the surface. The existing technology mainly relies on manual processing, and the production pace is slow. The currently developed automatic wire stripping mainly uses a laser machine to burn the wire.

[0003] The existing wire stripping mainly relies on laser ring cutting, but the surface of the wire cannot be well processed by secondary injection molding after laser burning, and the injection molding layer is prone to fall off. Summary of the invention

[0004] According to one aspect of the present invention, there is provided an automated wire ring cutting device, comprising a machine platform, a ring cutting device, a first fixing device, and a second fixing device, wherein the ring cutting device, the first fixing device, and the second fixing device are all arranged on the machine platform, the first fixing device and the second fixing device are respectively located at two ends of the ring cutting device, the active end of the first fixing device extends into the working end of the ring cutting device, and the active ends of the ring cutting device, the first fixing device, and the second fixing device are located on the same straight line;

[0005] The first fixing device is configured to fix one end of the wire;

[0006] The second fixing device is configured to fix the other end of the wire;

[0007] The ring cutting device is configured to perform a ring cutting process on the wire.

[0008] The present invention provides an automated device for wire ring cutting. The device is mainly composed of a ring cutting device, a first fixing device, and a second fixing device. During the operation of the device, the wire is inserted into the ring cutting device, and one end of the wire enters the first fixing device, and the other end of the wire cooperates with the second fixing device. The first fixing device works to fix one end of the wire, the second fixing device works to fix the other end of the wire, and the ring cutting device works to ring cut the wire, thereby completing the entire ring cutting process of the wire.

[0009] In some embodiments, the first fixing device includes a first driving member, a mounting plate, a second driving member, a fixing tube and a first clamping assembly, the mounting plate is fixed to the driving end of the first driving member, the second driving member is fixed to one end of the mounting plate, the fixing tube is fixed to the other end of the mounting plate, and the first clamping assembly can be movably mounted in the fixing tube and is drivingly connected to the second driving member.

[0010] Therefore, the first driving member is used to adjust the relative position between the mounting plate and the ring cutting device, so that the device can perform ring cutting on wires of different lengths. During the operation of the first fixing device, the wire enters the working end of the ring cutting device and enters the fixing tube and cooperates with the first clamping assembly, and the second driving member drives the first clamping assembly, and the first clamping assembly fixes the wire.

[0011] In some embodiments, the first clamping assembly includes a pull rod and a chuck. The pull rod is movably sleeved in the fixed tube. One end of the pull rod is drivingly connected to the second driving member, and the chuck is disposed at the other end of the pull rod.

[0012] Thus, when the first clamping assembly is fixed, one end of the wire enters the chuck, the second driving member drives the pull rod, the chuck retracts into the fixed tube, and the chuck as a whole contracts to clamp the wire.

[0013] In some embodiments, the circumcision device includes an adjusting drive assembly, a mounting frame, a circumcision drive assembly, a rotating tube, and a circumcision head. The mounting frames are all arranged at the driving end of the adjusting drive assembly, the circumcision drive assembly is arranged on the mounting frame, the rotating tube is rotatably arranged on the mounting frame, the circumcision drive assembly is connected to the rotating tube driving, the circumcision head is arranged at one end of the rotating tube, and the fixed tube is arranged in the rotating tube through a bearing sleeve.

[0014] Thus, the adjustment drive assembly is configured to drive the mounting frame to move forward and backward, so as to adjust the cutting length; the ring cutting drive assembly is configured to drive the rotating tube to rotate. During the ring cutting process of the ring cutting device, one end of the wire enters the rotating tube from the working end of the ring cutting head, and one end of the wire is clamped with the first clamping assembly in the rotating tube. The ring cutting drive assembly drives to work, and the rotating tube works together with the ring cutting head to perform ring cutting on the wire to achieve ring cutting.

[0015] In some embodiments, the adjustment drive assembly includes a first motor, a screw, a slider, a slide rail and a sliding frame. The screw is arranged at the driving end of the first motor, the sliding frame is arranged on the end surface of the machine through the slide rail, and the slider is arranged at the lower end of the sliding frame and cooperates with the screw.

[0016] Therefore, during the adjustment process of the adjustment assembly, the first motor is driven, the screw rod rotates, and the slider drives the sliding frame to slide on the slide rail.

[0017] In some embodiments, the circumcision drive assembly includes a second motor, a driving wheel, a driven wheel and an adjusting wheel. The second motor is installed on the inner side of the mounting frame, and the driving wheel, the driven wheel and the adjusting wheel are all installed on the outer side of the mounting frame. The driving wheel is connected to the second motor, and the driven wheel is sleeved outside the rotating tube. The driving wheel, the driven wheel and the adjusting wheel are connected in a transmission manner.

[0018] Therefore, during the driving process of the circumcision drive assembly, the second motor drives the driving wheel, the driven wheel and the adjusting wheel, so that the rotating tube sleeved in the driven wheel rotates.

[0019] In some embodiments, the second fixing device includes a fixed vertical plate, a mounting base, a clamping assembly, and a second openable and closable clamp assembly, wherein the mounting base is disposed on the fixed vertical plate, the second clamp assembly is detachably disposed on the mounting base, and the clamping assembly is disposed on the fixed vertical plate and is positioned to cooperate with the second clamp assembly.

[0020] Therefore, during the fixing process of the second fixing device, the wire is placed on the working end of the second clamp assembly, the clamping assembly drives the second clamp assembly, and the second clamp assembly clamps and fixes the wire.

[0021] In some embodiments, the second clamp assembly includes a carrier plate, a buckle and a pressure plate, wherein the pressure plate is disposed on one side of the carrier plate through a first elastic member, and the buckle is disposed on the other side of the carrier plate through a second elastic member, and the buckle cooperates with the pressure plate.

[0022] Thus, the wire is placed on the carrier plate, and when the clamping assembly is driven, the buckle and the pressure plate cooperate to clamp and fix the wire.

[0023] In some embodiments, the clamping assembly includes a third driving member, a mounting fork, and a clamping fork. The mounting fork is disposed at the driving end of the third driving member, the clamping fork is hinged to the mounting fork, and a buffer and an adjusting member are disposed between the clamping fork and the mounting fork.

[0024] Therefore, during the driving process of the clamping assembly, the third driving member is driven, the clamping fork is close to the pressing plate, and is self-adjusted through the buffer member and the adjusting member, thereby driving the second clamp assembly.

[0025] The beneficial effects of the present invention are specifically manifested as follows: the equipment is convenient for realizing online production, and after being connected, it can realize steps such as automatic feeding, automatic circular cutting, and automatic discharging. The equipment saves manpower, improves efficiency and yield, improves the safety factor, and facilitates production control. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of an automated wire ring cutting device according to one embodiment of the present invention.

[0027] Figure 2 for Figure 1 The schematic diagram of the top view of the wire ring cutting automation equipment is shown.

[0028] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure in the AA direction.

[0029] Figure 4for Figure 1 The three-dimensional structural schematic diagram of the first fixing device in the wire ring cutting automation equipment and its partial enlarged structural schematic diagram are shown.

[0030] Figure 5 for Figure 1 The three-dimensional structural schematic diagram of the ring cutting device in the wire ring cutting automation equipment is shown.

[0031] Figure 6 for Figure 5 A schematic diagram of the cross-sectional three-dimensional structure of the circular cutting device is shown.

[0032] Figure 7 for Figure 1 The three-dimensional structural schematic diagram of the second fixing device in the wire ring cutting automation equipment and its partially enlarged structural schematic diagram are shown.

[0033] Figure 8 for Figure 7 A schematic three-dimensional structure diagram of a partial structure of the second fixing device is shown.

[0034] Numbers in the figure: 0-machine, 1-circular cutting device, 11-adjusting drive assembly, 111-first motor, 112-screw, 113-sliding block, 114-slide rail, 115-sliding frame, 12-mounting frame, 13-circular cutting drive assembly, 131-second motor, 132-driving wheel, 133-driven wheel, 134-adjusting wheel, 135-adjusting assembly, 14-rotating tube, 15-circular cutting head, 16-bearing, 2-first fixed Device, 21-first driving member, 22-mounting plate, 23-second driving member, 24-fixing tube, 25-first clamping assembly, 251-pull rod, 252-chuck, 3-second fixing device, 31-fixed vertical plate, 32-mounting base, 33-pressing assembly, 331-carrier plate, 332-press buckle, 333-pressing plate, 34-second clamp assembly, 341-third driving member, 342-mounting fork, 343-pressing fork. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below with reference to the accompanying drawings. In this description, the positive direction of the X axis is right, the negative direction of the X axis is left; the positive direction of the Y axis is front, the negative direction of the Y axis is back; the positive direction of the Z axis is up, the negative direction of the Z axis is down.

[0036] Figure 1-3The wire ring cutting automation equipment according to an embodiment of the present invention is schematically shown, comprising a machine platform 0, a ring cutting device 1, a first fixing device 2, and a second fixing device 3. The ring cutting device 1, the first fixing device 2, and the second fixing device 3 are all arranged on the machine platform 0. The first fixing device 2 and the second fixing device 3 are respectively located at the left and right ends of the ring cutting device 1. The active end of the first fixing device 2 extends into the working end of the ring cutting device 1. The active ends of the ring cutting device 1, the first fixing device 2, and the second fixing device 3 are located on the same straight line.

[0037] The first fixing device 2 is configured to fix one end of the wire;

[0038] The second fixing device 3 is configured to fix the other end of the wire;

[0039] The ring cutting device 1 is configured to perform a ring cutting process on a wire.

[0040] The present invention provides an automated device for wire ring cutting. The device mainly consists of a ring cutting device 1, a first fixing device 2, and a second fixing device 3. During the operation of the device, the wire is inserted into the ring cutting device 1, and one end of the wire enters the first fixing device 2, and the other end of the wire cooperates with the second fixing device 3. The first fixing device 2 works to fix one end of the wire, and the second fixing device 3 works to fix the other end of the wire. The ring cutting device 1 works to ring cut the wire, thereby completing the entire ring cutting process of the wire.

[0041] Combination Figure 4 The first fixing device 2 includes a first driving member 21, a mounting plate 22, a second driving member 23, a fixing pipe 24 and a first clamping assembly 25. The first driving member 21 is mounted on the end surface of the machine platform 0 through a vertical plate and a horizontal plate; the mounting plate 22 is fixed to the driving end of the first driving member 21; the fixing end of the second driving member 23 is arranged at the left end of the mounting plate 22; the fixing pipe 24 is arranged at the right end of the mounting plate 22 through a fixing block, and the fixing pipe 24 extends into the working end of the ring cutting device 1; the first clamping assembly 25 is movably sleeved in the fixing pipe 24 and is drivingly connected to the second driving member 23.

[0042] The first driving member 21 is used to adjust the relative position between the mounting plate 22 and the ring cutting device 1, so that the device can perform ring cutting on wires of different lengths. During the operation of the first fixing device 2, the wire enters the working end of the ring cutting device 1 and enters the fixing tube 24 and cooperates with the first clamping assembly 25, and the second driving member 23 drives the first clamping assembly 25, and the first clamping assembly 25 fixes the wire.

[0043] Combination Figure 4The first clamping assembly 25 includes a pull rod 251 and a clamp 252. The pull rod 251 is movably sleeved in the fixed tube 24, the left end of the pull rod 251 is drivingly connected to the second driving member 23, and the clamp 252 is arranged at the right end of the pull rod 251. The clamp 252 is trumpet-shaped, and a plurality of slits are arranged on its wall. The shape of the clamp 252 is as shown in FIG. Figure 4 The clamp 252 can enter or leave the fixed tube 24 under the drive of the second driving member 23; when the clamp 252 enters the fixed tube 24, the fixed tube 24 compresses the clamp 252 to fix the wire; when the clamp 252 leaves the fixed tube 24, the clamp 252 recovers and releases the wire. The working end of the first fixing device 2 is the clamp 252.

[0044] When the first clamping assembly 25 is fixed, one end of the wire enters the clamp 252, and the second driving member 23 drives the pull rod 251, and the clamp 252 retracts into the fixing tube 24, and the clamp 252 shrinks as a whole to clamp the wire.

[0045] Combination Figure 5-6 The circumcision device 1 comprises an adjusting driving assembly 11, a mounting frame 12, a circumcision driving assembly 13, a rotating tube 14, and a circumcision head 15. The adjusting driving assembly 11 is arranged on the upper end surface of the machine platform 0; the mounting frame 12 is arranged at the driving end of the adjusting driving assembly 11; the circumcision driving assembly 13 is arranged on the mounting frame 12, the rotating tube 14 is rotatably arranged on the mounting frame 12 through a bearing assembly, and the circumcision driving assembly 13 is drivingly connected to the rotating tube 14; the circumcision head 15 is arranged at the right end of the rotating tube 14, and the fixed tube 24 is sleeved in the rotating tube 14 through a bearing 16.

[0046] The adjustment drive assembly 11 is configured to drive the mounting frame 12 to move forward and backward, and can adjust the cutting length; the ring cutting drive assembly 13 is configured to drive the rotating tube 14 to rotate. During the ring cutting process of the ring cutting device 1, one end of the wire enters the rotating tube 14 from the working end of the ring cutting head 15, and one end of the wire is clamped with the first clamping assembly 25 in the rotating tube 14. The ring cutting drive assembly 13 drives to work, and the rotating tube 14 works together with the ring cutting head 15 to perform ring cutting on the wire to achieve ring cutting.

[0047] Combination Figure 5-6 The adjustment drive assembly 11 includes a first motor 111, a screw 112, a slider 113, a slide rail 114 and a slide frame 115. The slide frame 115 is the driving end of the drive assembly, and the mounting frame 12 and the ring cutting drive assembly 13 are arranged on the upper end surface of the mounting frame 12; the first motor 111 is arranged on the end surface of the machine 0, the screw 112 is arranged on the driving end of the first motor 111, the slide frame 115 is arranged on the end surface of the machine 0 through the slide rail 114, and the slider 113 is arranged on the bottom end surface of the slide frame 115 and cooperates with the screw 112.

[0048] During the adjustment process of the adjustment assembly 135 , the first motor 111 is driven, the screw rod 112 rotates, and the slider 113 drives the sliding frame 115 to slide on the slide rail 114 .

[0049] Combination Figure 5-6 The circumcision drive assembly 13 includes a second motor 131, a driving wheel 132, a driven wheel 133 and an adjusting wheel 134. The second motor 131 is mounted on the inner side of the mounting frame 12, and the driving wheel 132, the driven wheel 133 and the adjusting wheel 134 are all mounted on the outer side of the mounting frame 12; the driving wheel 132 is connected to the second motor 131 by driving, and the driven wheel 133 is sleeved outside the rotating tube 14, and the driving wheel 132, the driven wheel 133 and the adjusting wheel 134 are connected by belt transmission. The adjusting wheel 134 is provided with an adjusting assembly 135, which is responsible for applying pressure to the adjusting wheel 134, forcing the adjusting wheel 134 to press the belt to ensure stable transmission.

[0050] During the driving process of the circumcision driving assembly 13 , the second motor 131 is driven, and the driving wheel 132 , the driven wheel 133 , and the adjusting wheel 134 are driven, so that the rotating tube 14 sleeved in the driven wheel 133 rotates.

[0051] Combination Figure 7-8 The second fixing device 3 includes a fixed vertical plate 31, a mounting base 32, a clamping assembly 33 and a second clamp assembly 34 that can be opened and closed. The fixed vertical plate 31 is arranged on the end surface of the machine platform 0 and is located on the right side of the ring cutting device 1; the mounting base 32 is arranged on the fixed vertical plate 31, and the second clamp assembly 34 is detachably arranged on the mounting base 32. The mounting base 32 is provided with a locking block and a locking bolt, and the second clamp assembly 34 is clamped by the locking block and the locking bolt. In other words, the device can replace the second clamp assembly 34 to adapt to different types of wires; the clamping assembly 33 is arranged on the fixed vertical plate 31 and is located to cooperate with the second clamp assembly 34. The clamping assembly 33 is inclined at four or five degrees and its working end is aligned with the second clamp assembly 34.

[0052] During the fixing process of the second fixing device 3 , the wire is placed on the working end of the second clamp assembly 34 , the pressing assembly 33 drives the second clamp assembly 34 , and the second clamp assembly 34 clamps and fixes the wire.

[0053] Combination Figure 7-8 The second clamp assembly 34 includes a carrier plate 331, a buckle 332 and a pressure plate 333. The carrier plate 331 is mounted on the mounting base 32, the pressure plate 333 is disposed on one side of the carrier plate 331 through a first elastic member, the buckle 332 is disposed on the other side of the carrier plate 331 through a second elastic member, and the buckle 332 cooperates with the pressure plate 333.

[0054] The wire is placed on the carrier plate 331 , and when the clamping assembly 33 is driven, the buckle 332 and the pressing plate 333 cooperate to clamp and fix the wire.

[0055] Combination Figure 7-8 The clamping assembly 33 includes a third driving member 341, a mounting fork 342, and a clamping fork 343. The third driving member 341 is fixed to the fixed vertical plate 31, the mounting fork 342 is arranged at the driving end of the third driving member 341, the clamping fork 343 is hinged to the mounting fork 342, and a buffer and an adjusting member are arranged between the clamping fork 343 and the mounting fork 342. The specific shapes of the mounting fork 342 and the clamping fork 343 refer to the attached Figure 7 The enlarged partial view shows that it is an integrated piece composed of two right-angle plates and an inclined plate.

[0056] During the driving process of the clamping assembly 33 , the third driving member 341 is driven, the clamping fork 343 approaches the pressing plate 333 , and self-adjusts through the buffer member and the adjusting member, thereby driving the second clamp assembly 34 .

[0057] In this embodiment, the first driving member 21 , the second driving member 23 , and the third driving member 341 are all cylinders, and the first motor 111 and the second motor 131 are all servo drive motors.

[0058] Combination Figure 3 , the specific working process of this equipment is as follows:

[0059] S1. Feeding: insert the wire into the ring cutting device 1, and let the left end of the wire enter the first fixing device 2, and the right end of the wire cooperates with the second fixing device 3.

[0060] S2. Clamping and fixing:

[0061] In the first fixing device 2, the left end of the wire enters the clamp 252, the second driving member 23 drives the pull rod 251, the clamp 252 retracts into the fixing tube 24, and the clamp 252 shrinks as a whole to clamp the wire;

[0062] In the second fixing device 3, the right end of the wire is placed on the working end of the second clamp assembly 34 (i.e., on the carrier plate 331 of the second clamp assembly 34), the clamping assembly 33 drives the second clamp assembly 34, and the buckle 332 and the pressure plate 333 of the clamping assembly 33 cooperate to clamp and fix the wire.

[0063] S3, circumferential cutting: the circumferential cutting driving assembly 13 drives to work, the rotating tube 14 works together with the circumferential cutting head 15 to perform circumferential cutting on the wire to achieve circumferential cutting.

[0064] S4, discharging: the first fixing device 2 and the second fixing device 3 are reset, and the wire material is taken out.

[0065] This equipment is convenient for realizing online production. After being connected, it can realize the steps of automatic feeding, automatic circular cutting, automatic discharging and the like. This equipment saves manpower, improves efficiency and yield, increases the safety factor, and facilitates production control.

[0066] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. Wire ring cutting automation equipment, characterized in that: The invention comprises a machine platform (0), a circular cutting device (1), a first fixing device (2), and a second fixing device (3); the circular cutting device (1), the first fixing device (2), and the second fixing device (3) are all arranged on the machine platform (0); the first fixing device (2) and the second fixing device (3) are respectively located at two ends of the circular cutting device (1); the active end of the first fixing device (2) extends into the working end of the circular cutting device (1); and the active ends of the circular cutting device (1), the first fixing device (2), and the second fixing device (3) are located on the same straight line; The first fixing device (2) is configured to fix one end of the wire; The second fixing device (3) is configured to fix the other end of the wire; The ring cutting device (1) is configured to perform a ring cutting process on the wire; The first fixing device (2) comprises a first driving member (21), a mounting plate (22), a second driving member (23), a fixing tube (24) and a first clamping assembly (25), wherein the mounting plate (22) is fixed to the driving end of the first driving member (21), the second driving member (23) is fixed to one end of the mounting plate (22), the fixing tube (24) is fixed to the other end of the mounting plate (22), the fixing tube (24) extends into the working end of the circumcision device (1), and the first clamping assembly (25) is movably sleeved in the fixing tube (24) and is drivingly connected to the second driving member (23); The first clamping assembly (25) comprises a pull rod (251) and a clamp (252), wherein the pull rod (251) is movably sleeved in the fixed tube (24), one end of the pull rod (251) is drivingly connected to the second driving member (23), and the clamp (252) is arranged at the other end of the pull rod (251); The ring cutting device (1) comprises an adjusting drive assembly (11), a mounting frame (12), a ring cutting drive assembly (13), a rotating tube (14), and a ring cutting head (15); the mounting frame (12) is arranged at a driving end of the adjusting drive assembly (11); the ring cutting drive assembly (13) is arranged on the mounting frame (12); the rotating tube (14) is rotatably arranged on the mounting frame (12); the ring cutting drive assembly (13) is drivingly connected to the rotating tube (14); the ring cutting head (15) is arranged at one end of the rotating tube (14); and the fixed tube (24) is sleeved in the rotating tube (14) via a bearing (16).

2. The wire ring cutting automation equipment according to claim 1 is characterized in that: The adjustment drive assembly (11) comprises a first motor (111), a screw rod (112), a slider (113), a slide rail (114) and a slide frame (115); the screw rod (112) is arranged at the driving end of the first motor (111); the slide frame (115) is arranged on the end surface of the machine platform (0) through the slide rail (114); the slider (113) is arranged at the lower end of the slide frame (115) and cooperates with the screw rod (112).

3. The wire ring cutting automation equipment according to claim 1 is characterized in that: The circumcision drive assembly (13) comprises a second motor (131), a driving wheel (132), a driven wheel (133) and an adjusting wheel (134); the second motor (131) is mounted on the inner side of the mounting frame (12); the driving wheel (132), the driven wheel (133) and the adjusting wheel (134) are all mounted on the outer side of the mounting frame (12); the driving wheel (132) is drivingly connected to the second motor (131); the driven wheel (133) is sleeved outside the rotating tube (14); and the driving wheel (132), the driven wheel (133) and the adjusting wheel (134) are drivingly connected.

4. The wire ring cutting automation equipment according to any one of claims 1 to 3, characterized in that: The second fixing device (3) comprises a fixed vertical plate (31), a mounting base (32), a clamping assembly (33) and a second clamp assembly (34) which can be opened and closed. The mounting base (32) is arranged on the fixed vertical plate (31), the second clamp assembly (34) is detachably arranged on the mounting base (32), and the clamping assembly (33) is arranged on the fixed vertical plate (31) and is positioned to cooperate with the second clamp assembly (34).

5. The wire ring cutting automation equipment according to claim 4 is characterized in that: The second clamp assembly (34) includes a carrier plate (331), a buckle (332) and a pressure plate (333), wherein the pressure plate (333) is arranged on one side of the carrier plate (331) via a first elastic member, and the buckle (332) is arranged on the other side of the carrier plate (331) via a second elastic member, and the buckle (332) cooperates with the pressure plate (333).

6. The wire ring cutting automation equipment according to claim 4 is characterized in that: The clamping assembly (33) comprises a third driving member (341), a mounting fork (342), and a clamping fork (343); the mounting fork (342) is arranged at the driving end of the third driving member (341); the clamping fork (343) is hinged on the mounting fork (342); and a buffer member and an adjusting member are arranged between the clamping fork (343) and the mounting fork (342).

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