Copper clad wire coating equipment

Abstract

The present invention discloses a copper-clad wire coating device, which belongs to the technical field of wire coating equipment. The copper-clad wire coating device comprises a workbench, the upper surface of which is equipped with a wire feeding mechanism, a wrapping mechanism and a reinforcement mechanism. The wire feeding mechanism comprises a fixed frame and a movable frame. The moving trajectory of the movable frame is limited by the structure of the plug-in plate, and the movable frame is driven to move toward the fixed frame by the elastic force of the spring to achieve a clamping effect. While providing stable support for the operation of the electric bearing, different types of conveying rollers can be replaced according to the conveying of wires of different thicknesses. The operation of the electric bearing drives the driving block to rotate, thereby cooperating with the driving groove to realize the rotation function of the conveying roller and achieve the conveying effect for the wire. During the conveying process, the roller moves downward along the slide rail with gravity, and cooperates with the structure of the No. 1 wire harness frame to further limit the direction of the wire, thereby achieving a more flexible and complete conveying function for the wire.

Description

Technical Field

[0001] The invention belongs to the technical field of wire coating equipment, and in particular relates to copper-clad wire coating equipment. Background Art

[0002] Wire coating equipment is a professional device that provides protection for wires by covering the surface of the wires with a protective layer. In the actual use of wire coating equipment, since conventional types of wire coating equipment are often used through conveyor belts to achieve the wire transportation effect, a complex positioning process is required during transportation to avoid the deviation of the wire direction, making the wire coating work relatively cumbersome, and the adaptability to wires of different thicknesses is poor, which needs to be improved.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0005] A copper-clad wire coating device comprises a workbench, the upper surface of which is equipped with a wire feeding mechanism, a wrapping mechanism and a reinforcement mechanism, the wire feeding mechanism comprises a fixed frame and a movable frame, the upper and lower ends of the side surfaces of the fixed frame and the movable frame are rotatably connected with electric bearings, the side surfaces of the electric bearings are equipped with driving blocks, conveying rollers are arranged between the electric bearings, and driving grooves are provided on both sides of the conveying rollers, the bottom end of the side surface of the fixed frame is equipped with an insert plate, the side surface of the insert plate is equipped with side plates, a spring is installed between the side plate and the movable frame, the front end of the fixed frame is equipped with a connecting frame, the side surface of the connecting frame is equipped with a No. 1 wire harness frame, both sides of the No. 1 wire harness frame are equipped with slide rails, and rollers are inserted into the inner sides of the slide rails.

[0006] As a further solution of the present invention: a notch is provided in the middle of the outer surface of the conveying roller, the conveying rollers are fitted together, the conveying rollers are fitted to the electric bearing, and the driving block is inserted into the inner side of the driving groove.

[0007] As a further solution of the present invention: the fixed frame is fixedly connected to the workbench by screws, the movable frame is slidably connected to the workbench, a slot is opened through the bottom end of the side surface of the movable frame, the slot is sleeved on the outer surface of the plug board, and the spring is conical in shape.

[0008] As a further solution of the present invention: the shape of the No. 1 wire harness frame is a hollow semi-cylindrical shape, the No. 1 wire harness frame is in contact with the inner wall of the notch, and the roller is located on the inner side of the No. 1 wire harness frame.

[0009] As a further solution of the present invention: the wrapping mechanism includes a support frame and a side frame, the support frame and the side frame are both fixedly connected to the workbench, the inner side of the support frame is provided with a copper placement roller, the front end of the support frame is equipped with a No. 1 motor, the output end of the No. 1 motor passes through the outer surface of the support frame and is fixedly connected to the copper placement roller.

[0010] As a further solution of the present invention: a heater is installed at the top of the side bracket, and an oblique bracket is provided at the output end of the heater. The oblique bracket is fixedly connected to the side bracket, and a roller is rotatably connected between the oblique brackets. A No. 2 motor is installed on the side surface of the oblique bracket, and the output end of the No. 2 motor is fixedly connected to the roller, and the rollers are in contact with each other.

[0011] As a further solution of the present invention: a guide plate is installed at the top of the oblique frame, a guide frame is installed at the bottom of the outer surface of the guide plate, and the shapes of the guide plate and the guide frame are both arc-shaped.

[0012] As a further solution of the present invention: the reinforcement mechanism includes a sliding frame, a sliding groove is opened on the upper surface of the workbench, the sliding frame is slidably connected to the inner side of the sliding groove, the upper surface of the sliding frame is equipped with a column, the rear end of the column is equipped with an arc plate, and the outer surface of the arc plate is provided with a No. 1 gear.

[0013] As a further solution of the present invention: a No. 3 motor is installed on the upper surface of the sliding frame, a turntable is installed at the output end of the No. 3 motor, a No. 2 gear is installed on the inner side of the turntable, the No. 2 gear is engaged with the No. 1 gear, a screw is installed at the rear end of the turntable, a threaded barrel is threadedly connected to the outer surface of the screw, and the threaded barrel is fixedly connected to the workbench.

[0014] As a further solution of the present invention: a No. 2 harness rack is installed on the inner side of the No. 1 gear, and the No. 2 harness rack and the No. 1 harness rack are located on the same horizontal line. Sleeve plates are installed on both sides of the outer surface of the No. 2 harness rack, and an electric telescopic rod is installed on the inner side of the sleeve plate. A slider is installed at the output end of the electric telescopic rod, and the slider is slidably connected to the inner side of the sleeve plate, and a reinforcement roller is rotatably connected between the sliders.

[0015] Beneficial effects:

[0016] 1. During the conveying process, the moving trajectory of the mobile frame is limited by the structure of the plug plate, and the mobile frame is driven to move toward the fixed frame by the elastic force of the spring to achieve a clamping effect, while providing stable support for the operation of the electric bearing. Different types of conveying rollers can be replaced according to the conveying of wires of different thicknesses. The operation of the electric bearing drives the drive block to rotate, thereby cooperating with the drive slot to realize the rotation function of the conveying roller and achieve the conveying effect of the wire. During the conveying process, the roller moves downward along the slide rail with gravity, and cooperates with the structure of the No. 1 wire harness rack to further limit the direction of the wire, thereby achieving a more flexible and complete conveying function for the wire.

[0017] 2. Through the structural combination of the oblique frame, guide plate, and guide frame, a shaping structure for the copper sheet is constructed. The operation of motor No. 1 drives the copper sheet placement roller to rotate, thereby achieving the function of discharging the copper sheet material. The operation of motor No. 2 drives the roller to rotate, thereby sending the copper sheet into the inside of the heater. After being heated by the heater, the copper sheet continues to be transported into the inside of the guide plate and guide frame for bending and shaping, so that it is spirally wound on the surface of the wire harness to achieve the effect of automated wrapping.

[0018] 3. After wrapping is completed, the operation of motor No. 3 drives the turntable and gear No. 2 to rotate, and the rotation of gear No. 2 drives gear No. 1 to rotate, so as to adjust the angle of harness frame No. 2 and reinforcement roller. The rotation of the turntable drives the screw to rotate, so as to cooperate with the structure of the threaded barrel to adjust the position of the support frame. In the process of position adjustment of the support frame and angle adjustment of gear No. 1, the distance between the reinforcement roller and harness frame No. 2 is adjusted by the extension and retraction of the electric telescopic rod, so as to realize the multi-angle pressing and tightening function of the copper sheet and achieve a more complete wrapping effect.

[0019] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the attached figure:

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 Schematic diagram of the wire feeding mechanism of the present invention;

[0023] Figure 3 This is an exploded schematic diagram of the wire feeding mechanism of the present invention;

[0024] Figure 4 Schematic diagram of the wrapping mechanism of the present invention;

[0025] Figure 5 For the present invention Figure 4 Explosion diagram of part of the structure;

[0026] Figure 6 Schematic diagram of the reinforcement mechanism of the present invention;

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the back view;

[0028] Figure 8 For the present invention Figure 7 A magnified schematic diagram of .

[0029] In the figure: 1. Workbench; 2. Fixed frame; 3. Mobile frame; 4. Electric bearing; 5. Drive block; 6. Conveyor roller; 7. Drive slot; 8. Insert plate; 9. Side plate; 10. Spring; 11. Connecting frame; 12. No. 1 harness frame; 13. Slide rail; 14. Roller; 15. Support frame; 16. Copper sheet placement roller; 17. No. 1 motor; 18. Side bracket; 19. Heater; 20. Oblique frame; 21. No. 2 motor; 22. Roller; 23. Guide plate; 24. Guide frame; 25. Sliding frame; 26. Column; 27. No. 1 gear; 28. No. 3 motor; 29. ​​Turntable; 30. No. 2 gear; 31. Screw; 32. Threaded barrel; 33. No. 2 harness frame; 34. Sleeve plate; 35. Electric telescopic rod; 36. Reinforcement roller. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0031] like Figures 1 to 3 As shown, a copper-clad wire coating equipment includes a workbench 1. The upper surface of the workbench 1 is equipped with a wire feeding mechanism, a wrapping mechanism and a reinforcement mechanism. The wire feeding mechanism includes a fixed frame 2 and a movable frame 3. The upper and lower ends of the side surfaces of the fixed frame 2 and the movable frame 3 are rotatably connected with electric bearings 4. The side surfaces of the electric bearings 4 are equipped with driving blocks 5. Conveying rollers 6 are arranged between the electric bearings 4. Driving grooves 7 are provided on both sides of the conveying rollers 6. The bottom end of the side surface of the fixed frame 2 is equipped with an insert plate 8. The side surface of the insert plate 8 is equipped with a side plate 9. A spring 10 is installed between the side plate 9 and the movable frame 3. The front end of the fixed frame 2 is equipped with a connecting frame 11. The side surface of the connecting frame 11 is equipped with a No. 1 harness frame 12. Both sides of the No. 1 harness frame 12 are equipped with slide rails 13, and the inner side of the slide rails 13 is inserted with rollers 14.

[0032] During the conveying process, the moving trajectory of the mobile frame 3 is limited by the structure of the plug plate 8, and the mobile frame 3 is driven to move toward the fixed frame 2 by the elastic force of the spring 10 to achieve a clamping effect, while providing stable support for the operation of the electric bearing 4. Different types of conveying rollers 6 can be replaced according to the conveying of wires of different thicknesses. Through the operation of the electric bearing 4, the driving block 5 is driven to rotate, thereby cooperating with the driving groove 7 to realize the rotation function of the conveying roller 6, thereby achieving the conveying effect for the wire. During the conveying process, the roller 14 moves downward along the slide rail 13 with gravity, and cooperates with the structure of the No. 1 wire harness frame 12 to further limit the direction of the wire, thereby achieving a more flexible and complete conveying function for the wire.

[0033] Specifically, such as Figure 2 As shown, a notch is provided in the middle of the outer surface of the conveying roller 6 , the conveying rollers 6 fit together, the conveying rollers 6 fit together with the electric bearing 4 , and the driving block 5 is inserted into the inner side of the driving groove 7 .

[0034] By inserting the driving block 5 into the inner side of the driving groove 7, the driving effect of the electric bearing 4 on the conveying roller 6 can be achieved, and then the conveying roller 6 rotates and rubs against the other set of conveying rollers 6, thereby driving the other set of conveying rollers 6 to rotate in the opposite direction, thereby realizing the forward and reverse rotation function of the conveying roller 6. The wiring harness is placed inside the notch, and the conveying roller 6 rotates and rubs against the wiring harness, driving the wiring harness to perform the conveying work in a clamping manner.

[0035] Specifically, such as Figure 3 As shown, the fixed frame 2 is fixedly connected to the workbench 1 by screws, the movable frame 3 is slidably connected to the workbench 1, a slot is provided through the bottom end of the side surface of the movable frame 3, the slot is sleeved on the outer surface of the inserting plate 8, and the spring 10 is conical in shape.

[0036] The purpose of this design is to ensure the stability of the structure of the fixed frame 2 through the connection method of screws, and to further limit the moving trajectory of the mobile frame 3 through the structural combination of slots and plug-ins. The mobile frame 3 is driven to move by the elastic force of the spring 10, and finally the electric bearing 4 clamps the conveyor roller 6 to prevent the conveyor roller 6 from loosening and falling off. At the same time, different models of conveyor rollers 6 can be replaced according to the different wire harnesses being processed, making the conveying work more flexible.

[0037] Specifically, such as Figure 3 As shown, the No. 1 harness rack 12 is in the shape of a hollow semi-cylinder. The No. 1 harness rack 12 fits in with the inner wall of the notch, and the roller 14 is located on the inner side of the No. 1 harness rack 12 .

[0038] After the wire harness passes through the conveying roller 6, it enters the inner side of the No. 1 wire harness rack 12 with the conveying work. The roller 14 moves downward along the slide rail 13 due to gravity, and rotates itself when the wire harness passes to avoid affecting the conveying work. Through the structural combination of the roller 14 and the No. 1 wire harness rack 12, the conveying trajectory of the wire harness is further limited, making the conveying work more stable.

[0039] Specifically, such as Figure 4 As shown, the wrapping mechanism includes a support frame 15 and a side frame 18, both of which are fixedly connected to the workbench 1. A copper placement roller 16 is sleeved on the inner side of the support frame 15, and a No. 1 motor 17 is installed at the front end of the support frame 15. The output end of the No. 1 motor 17 passes through the outer surface of the support frame 15 and is fixedly connected to the copper placement roller 16.

[0040] The purpose of this design is to provide stable support for the support frame 15 and the side frame 18, to limit the rotation trajectory of the copper sheet placement roller 16 through the support frame 15, to realize the winding and placement function of the copper sheet material through the copper sheet placement roller 16, and to realize the rotation of the copper sheet placement roller 16 by the No. 1 motor 17, so as to discharge the copper sheet material.

[0041] Specifically, such as Figure 5 As shown, a heater 19 is installed at the top of the side bracket 18, and an oblique bracket 20 is provided at the output end of the heater 19. The oblique bracket 20 is fixedly connected to the side bracket 18, and a roller 22 is rotatably connected between the oblique brackets 20. A No. 2 motor 21 is installed on the side surface of the oblique bracket 20, and the output end of the No. 2 motor 21 is fixedly connected to the roller 22, and the rollers 22 are in contact with each other.

[0042] The operation of the No. 2 motor 21 can drive the roller 22 to rotate. The relative rotation of the two sets of rollers 22 can further limit the conveying trajectory of the copper sheet, and the copper sheet can be sent into the interior of the heater 19. After being heated by the heater 19, the copper sheet continues to be conveyed into the inner side of the guide plate 23 and the guide frame 24.

[0043] Specifically, such as Figure 5 As shown, a guide plate 23 is mounted on the top of the oblique frame 20 , and a guide frame 24 is mounted on the bottom of the outer surface of the guide plate 23 . Both the guide plate 23 and the guide frame 24 are arc-shaped.

[0044] By setting the shape of the guide frame 24 and the guide plate 23, the copper sheet can be bent and shaped after being transported into the inner side of the guide plate 23 and the guide frame 24, so as to be spirally wound on the surface of the wiring harness to achieve an automated wrapping effect.

[0045] Specifically, such as Figure 6As shown, the reinforcement mechanism includes a sliding frame 25, a sliding groove is provided on the upper surface of the workbench 1, the sliding frame 25 is slidably connected to the inner side of the sliding groove, the upper surface of the sliding frame 25 is equipped with a column 26, the rear end of the column 26 is equipped with an arc plate, and the outer surface of the arc plate is sleeved with a number one gear 27.

[0046] This design limits the moving track of the sliding frame 25 through the sliding groove and limits the rotating track of the number one gear 27 through the structural combination of the column 26 and the arc plate.

[0047] Specifically, such as Figure 7 As shown, the upper surface of the sliding frame 25 is equipped with a No. 3 motor 28, the output end of the No. 3 motor 28 is equipped with a turntable 29, the inner side of the turntable 29 is equipped with a No. 2 gear 30, the No. 2 gear 30 is engaged with the No. 1 gear 27, and the rear end of the turntable 29 is equipped with a screw rod 31, the outer surface of the screw rod 31 is threadedly connected to a threaded barrel 32, and the threaded barrel 32 is fixedly connected to the workbench 1.

[0048] The operation of the No. 3 motor 28 can drive the turntable 29 and the No. 2 gear 30 to rotate. The rotation of the No. 2 gear 30 can drive the No. 1 gear 27 to rotate, thereby adjusting the angle of the No. 2 harness frame 33 and the reinforcement roller 36. The rotation of the turntable 29 can drive the screw 31 to rotate, thereby cooperating with the structure of the threaded barrel 32 to adjust the position of the support frame 15.

[0049] Specifically, such as Figure 8 As shown, the No. 2 harness rack 33 is installed on the inner side of the No. 1 gear 27. The No. 2 harness rack 33 and the No. 1 harness rack 12 are located on the same horizontal line. Both sides of the outer surface of the No. 2 harness rack 33 are provided with sleeve plates 34. The inner side of the sleeve plate 34 is provided with an electric telescopic rod 35. The output end of the electric telescopic rod 35 is provided with a slider. The slider is slidably connected to the inner side of the sleeve plate 34. A reinforcement roller 36 is rotatably connected between the sliders.

[0050] The purpose of this design is to further limit the position of the No. 2 wire harness rack 33, and to limit the moving trajectory of the slider through the sleeve 34. By extending and retracting the electric telescopic rod 35, the distance between the reinforcement roller 36 and the No. 2 wire harness rack 33 is adjusted, thereby realizing the multi-angle pressing and tightening function of the copper sheet and achieving a more complete wrapping effect.

[0051] Working principle:

[0052] During the conveying process, the moving trajectory of the mobile frame 3 is limited by the structure of the plug plate 8, and the elastic force of the spring 10 drives the mobile frame 3 to move toward the fixed frame 2 to achieve a clamping effect, providing stable support for the operation of the electric bearing 4. At the same time, different types of conveying rollers 6 can be replaced according to the conveying of wires of different thicknesses. The operation of the electric bearing 4 drives the driving block 5 to rotate, thereby cooperating with the driving slot 7 to realize the rotation function of the conveying roller 6 to achieve the conveying effect of the wire. During the conveying process, the roller 14 moves downward along the slide rail 13 with gravity, and cooperates with the structure of the No. 1 wire harness frame 12 to further limit the direction of the wire, achieving a more flexible and complete conveying function for the wire. Through the structural combination of the oblique frame 20, the guide plate 23, and the guide frame 24, a shaping structure for the copper sheet is constructed. The operation of the No. 1 motor 17 drives the copper sheet placement roller 16 to rotate, achieving the discharge function of the copper sheet material, and the No. 2 motor 2 The operation of 1 drives the roller 22 to rotate, thereby sending the copper sheet into the inside of the heater 19. After being heated by the heater 19, the copper sheet continues to be transported into the inside of the guide plate 23 and the guide frame 24 for bending and shaping, so that it is spirally wound on the surface of the wiring harness to achieve the effect of automated wrapping. After wrapping is completed, the operation of the No. 3 motor 28 drives the turntable 29 and the No. 2 gear 30 to rotate. The rotation of the No. 2 gear 30 drives the No. 1 gear 27 to rotate, thereby adjusting the angle of the No. 2 wiring harness frame 33 and the reinforcement roller 36. The rotation of the turntable 29 drives the screw 31 to rotate, thereby cooperating with the structure of the threaded cylinder 32 to adjust the position of the support frame 15. In the process of adjusting the position of the support frame 15 and adjusting the angle of the No. 1 gear 27, the electric telescopic rod 35 is extended and retracted to adjust the distance between the reinforcement roller 36 and the No. 2 wiring harness frame 33, thereby realizing the multi-angle pressing and tightening function of the copper sheet and achieving a more complete wrapping effect.

[0053] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A copper-clad wire coating device, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is provided with a wire feeding mechanism, a wrapping mechanism and a reinforcement mechanism, the wire feeding mechanism comprises a fixed frame (2) and a movable frame (3), the upper and lower ends of the side surfaces of the fixed frame (2) and the movable frame (3) are rotatably connected with electric bearings (4), the side surfaces of the electric bearings (4) are provided with driving blocks (5), a conveying roller (6) is provided between the electric bearings (4), and a driving groove (7) is provided on both sides of the conveying roller (6), a plug plate (8) is provided at the bottom end of the side surface of the fixed frame (2), a side plate (9) is provided on the side surface of the plug plate (8), a spring (10) is provided between the side plate (9) and the movable frame (3), a connecting frame (11) is provided at the front end of the fixed frame (2), a No. 1 harness frame (12) is provided on the side surface of the connecting frame (11), a No. 1 harness frame (12) is provided on both sides of the No. 1 harness frame (12), a slide rail (13) is provided on both sides of the slide rail (13), and a roller (14) is inserted into the inner side of the slide rail (13); The wrapping mechanism comprises a support frame (15) and a side frame (18), the support frame (15) and the side frame (18) are both fixedly connected to the workbench (1), the inner side of the support frame (15) is provided with a copper sheet placement roller (16), the front end of the support frame (15) is provided with a No. 1 motor (17), the output end of the No. 1 motor (17) passes through the outer surface of the support frame (15) and is fixedly connected to the copper sheet placement roller (16); The top end of the side bracket (18) is provided with a heater (19), the output end of the heater (19) is provided with an oblique bracket (20), the oblique bracket (20) is fixedly connected to the side bracket (18), a roller (22) is rotatably connected between the oblique brackets (20), a second motor (21) is provided on the side surface of the oblique bracket (20), the output end of the second motor (21) is fixedly connected to the roller (22), and the rollers (22) are in contact with each other; A guide plate (23) is mounted on the top of the oblique frame (20), and a guide frame (24) is mounted on the bottom of the outer surface of the guide plate (23). Both the guide plate (23) and the guide frame (24) are arc-shaped.

2. The copper-clad wire coating equipment according to claim 1, characterized in that: A notch is provided at the middle portion of the outer surface of the conveying roller (6), the conveying rollers (6) are fitted together, the conveying rollers (6) are fitted together with the electric bearing (4), and the driving block (5) is inserted into the inner side of the driving groove (7).

3. The copper-clad wire coating equipment according to claim 1, characterized in that: The fixed frame (2) is fixedly connected to the workbench (1) by screws, and the movable frame (3) is slidably connected to the workbench (1). A slot is provided through the bottom end of the side surface of the movable frame (3), and the slot is sleeved on the outer surface of the inserting plate (8). The spring (10) is conical in shape.

4. The copper-clad wire coating equipment according to claim 1, characterized in that: The No. 1 harness rack (12) is in the shape of a hollow semi-cylinder, the No. 1 harness rack (12) is fitted with the inner wall of the notch, and the roller (14) is located on the inner side of the No. 1 harness rack (12).

5. The copper-clad wire coating equipment according to claim 1, characterized in that: The reinforcement mechanism includes a sliding frame (25), a sliding groove is provided on the upper surface of the workbench (1), the sliding frame (25) is slidably connected to the inner side of the sliding groove, a column (26) is installed on the upper surface of the sliding frame (25), a rear end of the column (26) is provided with an arc plate, and the outer surface of the arc plate is sleeved with a number one gear (27).

6. The copper-clad wire coating equipment according to claim 5, characterized in that: A No. 3 motor (28) is mounted on the upper surface of the sliding frame (25), a turntable (29) is mounted on the output end of the No. 3 motor (28), a No. 2 gear (30) is mounted on the inner side of the turntable (29), the No. 2 gear (30) is meshed with the No. 1 gear (27), a screw rod (31) is mounted on the rear end of the turntable (29), the outer surface of the screw rod (31) is threadedly connected to a threaded barrel (32), and the threaded barrel (32) is fixedly connected to the workbench (1).

7. The copper-clad wire coating equipment according to claim 5, characterized in that: A No. 2 harness rack (33) is installed on the inner side of the No. 1 gear (27), and the No. 2 harness rack (33) and the No. 1 harness rack (12) are located on the same horizontal line. Both sides of the outer surface of the No. 2 harness rack (33) are equipped with sleeve plates (34), and the inner side of the sleeve plates (34) is equipped with an electric telescopic rod (35). The output end of the electric telescopic rod (35) is equipped with a slider, and the slider is slidably connected to the inner side of the sleeve plates (34). A reinforcement roller (36) is rotatably connected between the sliders.

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