Motor stator pressing machine

Abstract

The utility model discloses a motor stator press-fitting machine which is characterized in that the motor stator press-fitting machine comprises a rack, a press-fitting mechanism, a positioning mechanism and a supporting mechanism, the positioning mechanism comprises a positioning plate and a first driving mechanism, the positioning plate is provided with two positioning grooves, the first driving mechanism drives the positioning plate to move, and the supporting mechanism drives the positioning plate to move. Any one of the positioning grooves is right opposite to the supporting mechanism; the press-fitting mechanism is arranged above the positioning mechanism and comprises a hydraulic cylinder, a mounting plate, a sliding plate, a second driving mechanism and two pressing rings, the hydraulic cylinder is mounted at the top of the rack, the mounting plate is connected with an output shaft at the bottom of the hydraulic cylinder, the sliding plate is arranged at the bottom of the mounting plate in a sliding mode, and the second driving mechanism is connected with the sliding plate. The two pressing rings are installed on the bottom face of the sliding plate in a spaced mode, the second driving mechanism drives the sliding plate to move, and any pressing ring is arranged right opposite to the positioning groove over the supporting mechanism. According to the utility model, the press-fitting efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a motor production and processing field especially relates to a motor stator press fitting machine. BACKGROUND

[0002] The automobile seat is the position that the driver and the passenger provide convenient operation, comfortable and safe driving, riding. Among them, the automobile seat has two ways of manual adjustment and electric adjustment, in the electric adjustment automobile seat, mainly adopt the driver to drive the automobile seat, thereby drive the automobile seat to move or the rotation of backrest angle.

[0003] The motor is the main power component in the driver, and the main structure of the motor is the shell, the stator and the rotor, when the motor stator is installed on the inner wall of the shell, the motor stator is pressed into the shell by using the press fitting mechanism. In the prior art, when the motor stators of the same specification are assembled, the corresponding type of press fitting equipment is used for press fitting, if the size of the motor deviates, the press fitting machine needs to be replaced, or the positioning mechanism and the press head on the press fitting machine need to be replaced, which will affect the press fitting efficiency, increase the labor intensity of the operator, or directly use the corresponding press fitting equipment for press fitting, the cost will be relatively high. At the same time, if two different size products need to be press fitted, they cannot be press fitted at the same time, which has great limitations. Moreover, the product change time is relatively long, which affects the press fitting efficiency. SUMMARY

[0004] The utility model aims at providing a motor stator press fitting machine, through using the structure, improve the scope of application, reduce the labor intensity of operator.

[0005] In order to achieve the above object, the utility model adopts the technical scheme of a motor stator press fitting machine, including frame, position mechanism, support mechanism and press fitting mechanism installed on the frame, the position mechanism includes the positioning plate and the first drive mechanism, the support mechanism is arranged below the positioning plate, the positioning plate is provided with two positioning grooves, the first drive mechanism drives the positioning plate to move horizontally on the frame, and any positioning groove is arranged opposite to the support mechanism;

[0006] The press fitting mechanism is arranged above the position mechanism, the press fitting mechanism includes hydraulic cylinder, mounting plate, sliding plate, second drive mechanism and two press rings, the hydraulic cylinder is installed on the top of the frame, the mounting plate is connected with the output shaft at the bottom of the hydraulic cylinder, and the sliding plate is slidingly arranged at the bottom of the mounting plate, two press rings are spaced apart and installed on the bottom surface of the sliding plate, the second drive mechanism is installed on the mounting plate, the second drive mechanism drives the sliding plate to move, and any press ring is arranged opposite to the positioning groove above the support mechanism.

[0007] The support mechanism comprises a support cylinder and a support piece, the bottom of the support piece is connected with the output shaft of the top of the support cylinder, and the support cylinder drives the support piece to move upwards to be inserted into the positioning groove or to move downwards to be separated from the positioning groove.

[0008] In the technical scheme, the support piece is a three-jaw chuck.

[0009] In the technical scheme, two lower transverse sliding rails are arranged on the rack, and the bottom of the positioning plate is slidably arranged on the two lower transverse sliding rails; the first driving mechanism is a first transverse air cylinder, the output shaft of the first transverse air cylinder is connected with the rear side of the positioning plate, and the first transverse air cylinder drives the positioning plate to move transversely along the lower transverse sliding rails.

[0010] In the technical scheme, a buffer blocking mechanism is arranged on the left and right sides of the positioning plate, and the buffer blocking mechanism is arranged between the two lower transverse sliding rails.

[0011] The buffer blocking mechanism comprises a vertical plate, a limiting bolt arranged on the vertical plate, and a buffer rod, the middle part of the limiting bolt is screwed with the vertical plate, the middle part of the buffer rod is transversely slidably connected with the vertical plate, the inner end of the limiting bolt and the inner end of the buffer rod are arranged on the inner side of the vertical plate and face the end of the positioning plate.

[0012] In the technical scheme, the inner end of the buffer rod is provided with a buffer head, a spring is sleeved on the buffer rod, and the two ends of the spring are respectively abutted on the inner side of the buffer head and the vertical plate; in the extended state of the spring, the length of the buffer rod at the inner end of the vertical plate is greater than the length of the limiting bolt at the inner end of the vertical plate.

[0013] In the technical scheme, the front end and the rear end of the bottom surface of the mounting plate are fixedly provided with sliding blocks, the top front side and the top rear side of the sliding plate are provided with sliding rails, the sliding plate is slidably connected with the sliding blocks through the sliding rails, the second driving mechanism comprises a second transverse air cylinder, the second transverse air cylinder is arranged on the front side wall of the mounting plate, the left upper side of the sliding plate is provided with an upwardly extending extension plate, the output shaft of the second transverse air cylinder is connected with the extension plate, and the second transverse air cylinder drives the sliding plate to move transversely and be arranged below the mounting plate.

[0014] In the technical scheme, a clamping jaw is arranged on the rack between the hydraulic cylinder and the positioning plate, the rear end of the clamping jaw is vertically slidably arranged on the rack through a vertical sliding plate, and the clamping jaw faces the support mechanism.

[0015] The vertical slide plate is provided with a rear end slidingly arranged on the vertical slide rail; and a vertical driving mechanism is further arranged, which drives the vertical slide plate to move vertically along the vertical slide rail.

[0016] By using the technical scheme, the utility model has the following advantages compared with the prior art:

[0017] 1. The utility model discloses a positioning groove is set up on the positioning plate, and the positioning plate can be moved to make any positioning groove face the supporting mechanism, and the slide plate that can slide is also set up on the pressure equipment, and two pressure rings are set up on the slide plate, and any pressure ring can face the supporting mechanism, so that two products can be positioned by using two positioning grooves, the product is pressure -mounted and supported by the supporting mechanism, and then the corresponding pressure ring is used to pressure -mount the product, so that the application range and pressure -mounting efficiency are improved, and the labor intensity of the operator is reduced.

[0018] 2. The size of the two positioning grooves can be same or different, so that during the pressure -mounting process of one group of products, the other positioning groove can take and place the product, and the pressure -mounting efficiency and application range are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural schematic diagram in the embodiment one of the utility model;

[0020] Figure 2 It is the three -dimensional structure schematic diagram in the embodiment one of the utility model;

[0021] Figure 3 It is the three -dimensional structure schematic diagram of the positioning mechanism and the supporting mechanism in the embodiment one of the utility model;

[0022] Figure 4 It is Figure 3 The partial close -up view of the buffer blocking mechanism in the utility model.

[0023] Wherein: 1, rack; 11, lower horizontal slide rail; 12, vertical plate; 13, limit bolt; 14, buffer rod; 15, buffer head; 16, spring; 2, positioning mechanism; 21, positioning plate; 22, first driving mechanism; 23, positioning groove; 3, supporting mechanism; 31, supporting cylinder; 32, supporting piece; 4, pressure equipment; 41, hydraulic cylinder; 42, mounting plate; 43, slide plate; 44, second driving mechanism; 45, pressure ring; 46, sliding block; 47, slide rail; 48, extension plate; 51, clamping jaw; 52, vertical slide plate; 53, vertical slide rail; 54, vertical driving mechanism. DETAILED DESCRIPTION

[0024] The utility model will be further described in connection with the drawings and embodiments:

[0025] Embodiment one: see Figures 1-4 As shown in the figure, a motor stator press fitting machine comprises a frame 1, a positioning mechanism 2 mounted on the frame, a supporting mechanism 3 and a press fitting mechanism 4. The positioning mechanism 2 comprises a positioning plate 21 and a first driving mechanism 22. The supporting mechanism 3 is arranged directly below the positioning plate 21. The positioning plate 21 is provided with two positioning grooves 23 arranged in left and right directions. The first driving mechanism 22 drives the positioning plate 21 to move horizontally on the frame 1, and makes any one of the positioning grooves 23 face the supporting mechanism 3.

[0026] The press fitting mechanism 4 is arranged above the positioning mechanism 2. The press fitting mechanism 4 comprises a hydraulic cylinder 41, a mounting plate 42, a sliding plate 43, a second driving mechanism 44 and two press rings 45. The hydraulic cylinder 41 is mounted on the top of the frame 1. The mounting plate 42 is connected with the output shaft at the bottom of the hydraulic cylinder 41. The sliding plate 43 is slidingly arranged on the bottom of the mounting plate 42. The two press rings 45 are arranged in left and right directions on the bottom surface of the sliding plate 43. The second driving mechanism 44 is mounted on the mounting plate 42. The second driving mechanism 44 drives the sliding plate 43 to move, and makes any one of the press rings 45 face the positioning groove 23 directly above the supporting mechanism 3.

[0027] The sizes of the two positioning grooves can be same or different, if the sizes of the two positioning grooves are same, the sizes of the two compression rings are same, if the sizes of the two positioning grooves are different, the sizes of the two compression rings are different, and each compression ring is matched with a positioning groove, in the embodiment, the sizes of the two positioning grooves are taken as an example, the sizes of the two positioning grooves are different, and the two positioning grooves can position two products with different sizes, wherein the bottom of the positioning groove is communicated with the bottom surface of the positioning plate, in use, the first driving mechanism drives the positioning plate to move leftwards first, so that the right positioning groove moves to the top of the supporting mechanism, at this time, the second driving mechanism also drives the sliding plate to move leftwards, so that the right compression ring is located at the top of the supporting mechanism and faces the right positioning groove, then the motor shell is placed in the positioning groove, the supporting mechanism is inserted into the motor shell, then the stator is placed on the motor shell and faces the inner wall of the motor shell, then the output shaft of the hydraulic cylinder is extended to drive the compression ring to move downwards, so that the compression ring abuts against the stator and the stator is pressed into the motor shell until the stator abuts against the supporting mechanism, the pressing of the stator is completed, then the output shaft of the hydraulic cylinder is retracted to drive the compression ring to move upwards and separate from the motor shell and the stator, and the supporting mechanism also moves downwards and separates from the motor shell, then the first driving mechanism and the second driving mechanism drive the positioning plate and the sliding plate to move rightwards respectively, so that the left positioning groove and the left compression ring face the supporting mechanism, and the operator continues to repeat the above steps to press the stator, in the pressing process, the operator takes out the product pressed on the right side from the positioning groove, and meanwhile, a motor shell can be placed in the right positioning groove, after the stator on the left side is pressed, the positioning plate and the sliding plate move leftwards to press the stator on the right side, and the process is repeated, in this way, the efficiency of the stator pressing is high, the application range is wider (the two products with different sizes can be pressed), the process of replacing the positioning plate and the compression ring by the operator is reduced, and the labor intensity is lower.

[0028] Referring to Figures 1-3 As shown in the figure, the supporting mechanism 3 comprises a supporting cylinder 31 and a supporting piece 32, the bottom of the supporting piece 32 is connected with the output shaft at the top of the supporting cylinder 31, and the supporting cylinder 31 drives the supporting piece 32 to move upwards and be inserted into the positioning groove 23 or to move downwards and separate from the positioning groove 23.

[0029] In this embodiment, the support cylinder adopts a hydraulic cylinder or an electric cylinder. When the positioning groove moves above the support mechanism, the output shaft of the support cylinder extends to drive the support member to move upward, so that the top of the support member is inserted into the motor shell, and the top surface of the support member is flush with the bottom position required for the stator to be press-fitted. When the rear press ring is lowered to press-fit the stator into the motor shell, the stator is blocked by the support member to prevent the stator from moving downward and ensure the press-fitting accuracy of the stator. After the press-fitting is completed, the output shaft of the support cylinder is retracted to drive the support member to move downward and away from the motor shell and the positioning plate, so that it moves below the bottom surface of the positioning plate and does not interfere with the lateral movement of the positioning plate.

[0030] The support member is a three-jaw chuck. The three-jaw chuck is a three-jaw pneumatic chuck, which can adjust the diameter at the outer edge of the three-jaw chuck. If the sizes of the two positioning grooves are different, two different sizes of stators are press-fitted, and the wall thickness of the stator is relatively thin (the stator is a ring structure). Therefore, the three-jaw chuck is inserted into the motor shell, and the outer edge of the three-jaw chuck is close to the inner wall of the motor shell to ensure that it is directly below the stator. Two different stators are press-fitted, and the outer diameter of the three-jaw chuck is adjusted to match the corresponding motor shell and motor stator to ensure the support and positioning of the electronic stator. When the bottom of the motor shell is placed in the positioning groove, the lower outer edge of the motor shell is above the outside of the positioning groove and rests on the positioning plate, so that the motor shell does not move downward and fall out of the positioning groove during the press-fitting of the stator.

[0031] Referring to Figures 1-3 As shown in the figure, the rack 1 is provided with two lower transverse sliding rails 11, and the bottom sides of the positioning plate 21 are respectively slidably arranged on the two lower transverse sliding rails 11. The first driving mechanism 22 is a first transverse air cylinder, the output shaft of the first transverse air cylinder is connected to the rear side of the positioning plate 21, and the first transverse air cylinder drives the positioning plate 21 to move transversely along the lower transverse sliding rails 11.

[0032] The first transverse air cylinder is used to drive the positioning plate to move transversely along the lower transverse sliding rails, so that when the output shaft of the first transverse air cylinder extends, the positioning plate moves to the left, and the positioning groove on the right side faces the support mechanism. When the output shaft of the first transverse air cylinder retracts, it drives the positioning plate to move to the right, and the positioning groove on the left side faces the support mechanism.

[0033] Referring to Figure 3 , 4 As shown in the figure, the left and right sides of the positioning plate 21 are respectively provided with a buffer blocking mechanism, and the buffer blocking mechanism is arranged between the two lower transverse sliding rails 11.

[0034] The buffer blocking mechanism comprises a vertical plate 12, a limiting bolt 13 arranged on the vertical plate, and a buffer rod 14, the middle part of the limiting bolt 13 is screwed with the vertical plate 12, the middle part of the buffer rod 14 is transversely slidably connected with the vertical plate 12, the inner end of the limiting bolt 13 and the inner end of the buffer rod 14 are arranged on the inner side of the vertical plate 12 and face the end part of the positioning plate 21.

[0035] The vertical plate is provided with a sliding hole (the sliding hole is arranged in parallel with the lower transverse sliding rail), the middle part of the buffer rod is slidably arranged in the sliding hole, the inner end of the buffer rod 14 is provided with a buffer head 15, the outer end of the buffer rod is provided with a limiting head, the outer diameter of the limiting head and the outer diameter of the buffer head are greater than the diameter of the sliding hole, the limiting head is arranged on the outer side of the vertical plate, and the buffer head is arranged on the inner side of the vertical plate.

[0036] The buffer rod 14 is sleeved with a spring 16, the two ends of the spring 16 are respectively abutted on the buffer head 15 and the inner side surface of the vertical plate 12, in the extended state of the spring, the length of the buffer rod at the inner end of the vertical plate is greater than the length of the limiting bolt at the inner end of the vertical plate.

[0037] The arrangement of the buffer rod and the limiting bolt can mechanically position the left and right moving positions of the positioning plate, so that the positioning groove faces the supporting mechanism and the pressing ring. Meanwhile, when the positioning plate is about to contact the left or right limiting bolt, the buffer rod and the spring are arranged to first contact the buffer head, push the buffer rod to move towards the corresponding side, compress the spring, slow down the moving speed of the positioning plate, so that the positioning plate and the limiting bolt contact and collide at a low speed, prevent the rapid rigid impact from causing the motor shell above the positioning plate to shake and make the axis of the motor shell and the positioning plate not vertical, ensure that the stator can be accurately installed into the motor shell when the pressing ring is subsequently pressed down, and ensure the subsequent pressing precision. The buffer head is made of rubber and adopts flexible contact to reduce the impact force and the shaking of the motor shell.

[0038] Taking the blocking and buffering mechanism on the right side of the positioning plate as an example, in the extended state of the spring, the left end plane of the buffer head is on the left side of the left end plane of the limiting bolt, when the positioning plate moves to the right, the right side wall of the positioning plate will first contact the buffer head and push the buffer head and the buffer rod to move to the right, at this time, the spring is compressed, so as to slow down the movement of the positioning plate to the right, until the right side wall of the positioning plate contacts the limiting bolt, at this time, the positioning plate cannot continue to move to the right. When the positioning plate moves to the left, due to the existence of the spring, the positioning plate first separates from the contact with the limiting bolt, the spring pushes the buffer rod to move to the right, at this time, the buffer head contacts the right side of the positioning plate, until the limiting head contacts the right side of the vertical plate, the buffer rod and the buffer head will not continue to move to the left.

[0039] Referring to Figure 1 , 2As shown, the front end and rear end of the bottom surface of the mounting plate 42 are fixedly provided with sliding blocks 46, the front side and rear side of the top of the sliding plate 43 are provided with sliding rails 47 which are parallel to the lower transverse sliding rail 11, the sliding plate 43 is slidingly connected with the sliding blocks 46 through the sliding rails 47, and the second driving mechanism 44 comprises a second transverse air cylinder which is mounted on the front side wall of the mounting plate 42, the left side of the sliding plate 43 is provided with an extension plate 48 which extends upwards, the output shaft of the second transverse air cylinder is connected with the extension plate 48, and the second transverse air cylinder drives the sliding plate 43 to move transversely below the mounting plate 42.

[0040] When the first transverse air cylinder output shaft is extended, the sliding plate is driven to move leftwards, so that the right compression ring is opposite to the supporting mechanism, and when the hydraulic cylinder moves downwards, the stator can be pressed into the motor housing through the right compression ring. When the first transverse air cylinder output shaft is retracted, the sliding plate is driven to move rightwards, so that the left compression ring is opposite to the supporting mechanism, and when the hydraulic cylinder moves downwards, the stator can be pressed into the motor housing through the left compression ring. The second transverse air cylinder is arranged on the front side of the mounting plate, so as not to occupy the space between the sliding plate and the mounting plate and not to affect the up-down movement of the mounting plate, and the extension plate is used to connect the second transverse air cylinder output shaft and the sliding plate.

[0041] Referring to Figure 1 、 2 As shown, the rack between the hydraulic cylinder 41 and the positioning plate 21 is further provided with a clamping jaw 51, the rear end of the clamping jaw 51 is vertically slidingly arranged on the rack 1 through a vertical sliding plate 52, and the clamping jaw 51 is opposite to the supporting mechanism 3.

[0042] The rack 1 is provided with a vertical sliding rail 53, the rear end of the vertical sliding plate 52 is slidingly arranged on the vertical sliding rail 53, and a vertical driving mechanism 54 is further arranged, which drives the vertical sliding plate 52 to move vertically along the vertical sliding rail 53. The vertical driving mechanism adopts a combination of a vertical motor and a vertical screw rod, the vertical motor drives the vertical screw rod to rotate, the vertical screw rod is arranged beside the vertical sliding rail, the middle part of the vertical screw rod is screwed with the rear side of the vertical sliding plate, and through the rotation of the vertical screw rod, the vertical sliding plate and the clamping jaw are driven to move vertically.

[0043] The vertical sliding plate is provided with a clamping jaw air cylinder for controlling opening and closing of the clamping jaw. In use, the clamping jaw is in an intermediate position, is first opened, then the stator is placed into the clamping jaw, the clamping jaw air cylinder controls the clamping jaw to close, the stator is clamped (the length of the stator is greater than the thickness of the clamping jaw, so the top and bottom of the stator are above and below the clamping jaw), then the hydraulic cylinder output shaft extends to drive the pressing ring to move downward, in this process, the vertical driving mechanism also drives the vertical sliding plate to move downward, so that the bottom of the stator abuts against the top surface of the motor housing and faces the hollow of the motor housing, when the pressing ring moves downward and abuts against the stator, the clamping jaw is opened, at this time the pressing ring continues to move downward to press the stator into the motor housing, after the press fitting is completed, the pressing ring moves upward to disengage from the clamping jaw, at the same time, the clamping jaw also moves upward, then a new stator is placed into the clamping jaw by manual or mechanical hand, the clamping jaw clamps the stator, and the cycle is repeated. In this way, the stator can be automatically fed by the mechanical hand, manual feeding is not required, the initial positioning process of press fitting can also be realized by the clamping jaw clamping the stator, manual intervention is not required, labor intensity of the operator is reduced, and press fitting precision is ensured (the clamping jaw can ensure coaxiality of the axis of the stator, the motor housing and the pressing ring, the stator will not be inclined, and press fitting quality is ensured).

Claims

1. A motor stator press fitting machine characterized by: The device comprises a rack, a positioning mechanism, a supporting mechanism and a pressing mechanism, the positioning mechanism comprises a positioning plate and a first driving mechanism, the supporting mechanism is arranged below the positioning plate, two positioning grooves are arranged on the positioning plate, the first driving mechanism drives the positioning plate to move laterally on the rack and makes any positioning groove face the supporting mechanism; The pressing mechanism is arranged above the positioning mechanism, the pressing mechanism comprises a hydraulic cylinder, a mounting plate, a sliding plate, a second driving mechanism and two pressing rings, the hydraulic cylinder is mounted on the top of the rack, the mounting plate is connected with the output shaft at the bottom of the hydraulic cylinder, the sliding plate is arranged on the bottom of the mounting plate, the two pressing rings are arranged on the bottom surface of the sliding plate, the second driving mechanism is mounted on the mounting plate, the second driving mechanism drives the sliding plate to move and makes any pressing ring face the supporting mechanism.

2. The electric machine stator press fitting machine of claim 1, wherein: The supporting mechanism comprises a supporting cylinder and a supporting piece, the bottom of the supporting piece is connected with the output shaft at the top of the supporting cylinder, the supporting cylinder drives the supporting piece to move upwards and be inserted into the positioning groove or move downwards and be separated from the positioning groove.

3. The electric machine stator press fitting machine of claim 2, wherein: The supporting piece is a three-jaw chuck.

4. The electric machine stator press machine of claim 1, wherein: Two lower lateral sliding rails are arranged on the rack, the bottom of the positioning plate is arranged on the two lower lateral sliding rails, the first driving mechanism is a first lateral cylinder, the output shaft of the first lateral cylinder is connected with the rear side of the positioning plate, the first lateral cylinder drives the positioning plate to move laterally along the lower lateral sliding rails.

5. The electric machine stator press fitting machine of claim 4, wherein: A buffer blocking mechanism is arranged on the left and right sides of the positioning plate, the buffer blocking mechanism is arranged between the two lower lateral sliding rails. The buffer blocking mechanism comprises a vertical plate, a limiting bolt arranged on the vertical plate and a buffer rod, the middle part of the limiting bolt is screwed with the vertical plate, the middle part of the buffer rod is transversely and slidably connected with the vertical plate, the inner end of the limiting bolt and the inner end of the buffer rod are arranged on the inner side of the vertical plate and face the end of the positioning plate.

6. The electric machine stator press fitting machine of claim 5, wherein: The inner end of the buffer rod is provided with a buffer head, a spring is sleeved on the buffer rod, the two ends of the spring are respectively abutted on the buffer head and the inner side of the vertical plate, and the length of the buffer rod at the inner end of the vertical plate is greater than the length of the limiting bolt at the inner end of the vertical plate in the extended state of the spring.

7. The electric machine stator press machine of claim 1, wherein: The front end and the rear end of the bottom surface of the mounting plate are fixedly provided with sliding blocks, the top front side and the top rear side of the sliding plate are provided with sliding rails, the sliding plate is slidably connected with the sliding blocks through the sliding rails, the second driving mechanism comprises a second lateral cylinder, the second lateral cylinder is mounted on the front side wall of the mounting plate, the left side of the top of the sliding plate is provided with an upwardly extending extension plate, the output shaft of the second lateral cylinder is connected with the extension plate, and the second lateral cylinder drives the sliding plate to move laterally and be arranged below the mounting plate.

8. The electric machine stator press machine of claim 7, wherein: A clamping jaw is arranged on the rack between the hydraulic cylinder and the positioning plate, the rear end of the clamping jaw is vertically slidably arranged on the rack through a vertical sliding plate, and the clamping jaw faces the supporting mechanism. The rack is provided with vertical slide rails, and the rear end of the vertical slide plate is slidably arranged on the vertical slide rails. The vertical drive mechanism drives the vertical slide plate to move vertically along the vertical slide rails.

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