Assembling tool for middle beam of automotive trim

Abstract

The invention relates to the field of automobile interior center sill assembling, in particular to an automobile interior center sill assembling tool which comprises a frame, a profiling block and a clamping piece, the frame comprises a frame body and a mounting plate, rotating columns are fixedly connected to the two ends of the mounting plate, and the rotating columns are rotationally connected to the inner wall of the frame body around the axes of the rotating columns; a plurality of profiling blocks are arranged, a plurality of clamping pieces are arranged, the profiling blocks and the clamping pieces are fixedly connected to the two sides of the mounting plate, the profiling blocks are used for positioning and mounting all parts of the middle beam, the clamping pieces are arranged on the peripheries of the profiling blocks, and the clamping pieces are used for clamping and fixing the middle beam. The mounting plate can rotate, one worker conducts feeding and assembling on one side of the mounting plate, the other worker conducts discharging on the other side of the mounting plate, during use, the two workers complete feeding, assembling and discharging work on the two sides of the mounting plate at the same time, and the assembling efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile interior center beam assembly, and in particular to an automobile interior center beam assembly tool. Background Art

[0002] The center beam (also known as the central tunnel) of an automotive interior is a core functional carrier that runs through the bottom of the cockpit. Its front end integrates the gear shift mechanism, electronic parking brake, and storage module, and its rear end extends to the rear air conditioning vents. As a high-frequency contact area for passengers, the assembly precision of the center beam directly affects the aesthetics and structural stability of the entire vehicle interior.

[0003] The current mainstream center beam assembly tooling generally adopts a single-station fixed structure. During assembly, workers need to complete the loading, assembly, and unloading actions in a cycle at the same station, resulting in low assembly efficiency. Summary of the Invention

[0004] In order to improve assembly efficiency, the present application provides an automobile interior center beam assembly tool.

[0005] The present application provides an automotive interior center beam assembly tooling that adopts the following technical solutions: A tool for assembling a center beam of an automobile interior comprises a frame, a profiling block and a clamping piece. The frame comprises a frame body and a mounting plate. Both ends of the mounting plate are fixedly connected to a rotating column. The rotating column rotates around its own axis and is connected to the inner wall of the frame body. There are multiple profiling blocks and multiple clamping pieces. The profiling blocks and the clamping pieces are fixedly connected to both sides of the mounting plate. The profiling blocks are used to position and install various components of the center beam. The clamping pieces are provided on the outer periphery of the profiling blocks. The clamping pieces are used to clamp and fix the center beam.

[0006] By adopting the above technical solution, the mounting plate can be rotated, and one worker loads and assembles on one side of the mounting plate, while another worker unloads on the other side of the mounting plate. When in use, two workers complete the loading, assembling and unloading work on both sides of the mounting plate at the same time, thereby improving assembly efficiency.

[0007] Preferably, the frame further comprises a bearing, the inner wall of the frame body is provided with a rotating opening, the outer wall of the bearing is fixedly connected to the inner wall of the rotating opening, and the outer wall of the rotating column is fixedly connected to the inner wall of the bearing.

[0008] By adopting the above technical solution, the bearing reduces the friction between the mounting plate and the frame during rotation, making it easier to control the rotation of the mounting plate and improving assembly efficiency.

[0009] Preferably, an electromagnet is fixedly connected inside the profiling block, a first electrode sheet and a second electrode sheet are fixedly connected to the outer wall of the rotating column, the first electrode sheet and the second electrode sheet are arranged opposite each other, the first electrode sheet and the second electrode sheet are electrically connected to the electromagnets on both sides of the mounting plate, and a third electrode sheet is fixedly connected to the inner wall of the rotating mouth, when the third electrode sheet abuts against the first electrode sheet to achieve electrical connection, the electromagnet connected to the first electrode sheet is energized, and when the third electrode sheet abuts against the second electrode sheet to achieve electrical connection, the electromagnet connected to the second electrode sheet is energized.

[0010] By adopting the above technical solution, the electromagnets on both sides of the mounting plate are energized during the rotation of the rotating column, so that the electromagnet on the loading and assembly side is energized and the electromagnet on the unloading side is de-energized. The electromagnets generate magnetic force when energized, which adsorbs the components of the center beam for easy fixation. When the electromagnets are de-energized, the center beam is easily unloaded from the imitation block, thereby improving assembly efficiency.

[0011] Preferably, the profiling block is detachably connected to the mounting plate, the outer wall of the profiling block is fixedly connected to a fourth electrode sheet, the fourth electrode sheet is electrically connected to the electromagnet, and the outer wall of the mounting plate is fixedly connected to a fifth electrode sheet, the fifth electrode sheet is electrically connected to the first electrode sheet or the second electrode sheet.

[0012] By adopting the above technical solution, the profiling block can be replaced according to the shape of the center beam, adapted to different assembly requirements, and improve the utilization rate of tooling.

[0013] Preferably, a positioning member is further included, the positioning member includes a first spring and a positioning column, the inner wall of the rotating mouth is provided with a mounting groove, one end of the first spring is fixedly connected to the bottom of the mounting groove, the other end of the first spring is fixedly connected to the positioning column, the positioning column is slidably connected to the groove wall of the mounting groove, the outer wall of the rotating column is provided with a positioning groove, the positioning groove is used for the positioning column to extend into, the electromagnet adsorbs the first spring after being energized, and the end of the positioning column facing away from the first spring is set to a spherical surface.

[0014] By adopting the above technical solution, during the rotation of the rotating column, the positioning column is embedded in the positioning groove to locate the position of the mounting plate, which is convenient for subsequent mechanical unloading and improves assembly efficiency.

[0015] Preferably, it further comprises a driving motor, wherein the motor housing of the driving motor is fixedly connected to the frame, and the motor shaft of the driving motor is coaxially fixedly connected to the rotating column.

[0016] By adopting the above technical solution, the driving motor controls the rotation of the rotating column, and mechanical control is performed to improve assembly efficiency.

[0017] Preferably, a protective member is further included, which is arranged on one side of the frame. The protective member includes a mounting seat, a gravity sensor, a support spring, a platform and a controller. The mounting seat is fixedly connected to the ground, and a sliding groove is provided at the upper end of the mounting seat. The gravity sensor is fixedly connected to the bottom of the sliding groove. One end of the support spring is fixedly connected to the upper end of the gravity sensor, and the other end of the support spring is fixedly connected to the platform. The platform is slidably connected to the groove wall of the sliding groove. The gravity sensor is electrically connected to the controller, and the controller is electrically connected to the drive motor.

[0018] By adopting the above technical solution, when the user stands on the platform, the gravity sensor sends the detection value to the controller, and the controller controls the drive motor not to start, thereby reducing accidental injuries to workers and protecting the personal safety of workers.

[0019] Preferably, the protective member further comprises a lifting plate, which is slidably connected to the outer wall of the mounting seat facing the frame, and the sliding direction of the lifting plate is vertical, and the lifting plate is used to prevent the mounting plate from rotating.

[0020] By adopting the above technical solution, the lifting plate blocks the rotation of the mounting plate, so that even if the gravity sensor fails, the rotation of the mounting plate can still be blocked, thereby protecting the personal safety of the staff.

[0021] Preferably, the protective member also includes a first rack, a gear and a second rack, the mounting seat is provided with a first placement groove on the outer wall facing the frame, the sliding groove is provided with a second placement groove on the groove wall away from the frame, the mounting seat is provided with a placement cavity, the first placement groove and the second placement groove are connected to the placement cavity, the first rack is slidably connected to the groove wall of the first placement groove, the second rack is slidably connected to the groove wall of the second placement groove, the sliding directions of the first rack and the second rack are both vertical, the gear rotates around its own axis and is connected to the inner wall of the placement cavity, and the first rack and the second rack are respectively engaged with the two ends of the gear.

[0022] By adopting the above technical solution, when the user stands on the platform, the platform descends, the second rack slides downward, the gear rotates, the first rack slides upward, and the lifting plate is lifted upward to prevent the mounting plate from rotating, thereby protecting the personal safety of the staff.

[0023] Preferably, the protective member further comprises a pressure sensor, the pressure sensor being fixedly connected to one end of the lifting plate facing the frame, the pressure sensor being used for abutment by the mounting plate, and the pressure sensor being electrically connected to the controller.

[0024] By adopting the above technical solution, when the user stands on the platform and the mounting plate rotates, the pressure sensor sends the detected pressure value to the controller, and the controller cuts off the power supply of the drive motor to protect the personal safety of the staff.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The mounting plate can be rotated. One worker loads and assembles on one side of the mounting plate, while another worker unloads on the other side. When in use, two workers can complete the loading, assembly and unloading work on both sides of the mounting plate at the same time, improving assembly efficiency. 2. During the rotation of the rotating column, the electromagnets on both sides of the mounting plate are energized, so that the electromagnet on the loading and assembly side is energized, and the electromagnet on the unloading side is de-energized. The electromagnets generate magnetic force to adsorb the components of the center beam for easy fixation. When the electromagnets are de-energized, the center beam can be unloaded from the profiling block, thereby improving assembly efficiency. 3. When the user stands on the platform, the platform descends, the second rack slides downward, the gear rotates, the first rack slides upward, and the lifting plate lifts upward to prevent the mounting plate from rotating, protecting the personal safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic diagram of the overall structure of an automobile interior center beam assembly tool and a workpiece.

[0027] Figure 2 The present invention is a cross-sectional view of an assembly tool for a center beam of an automobile interior.

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0029] Figure 4 It is a schematic diagram of the internal structure of the frame, profiling block and clamping parts after being cut open.

[0030] Figure 5 It is a partial cross-sectional view of the protective part.

[0031] Explanation of reference numerals: 1, frame; 11, frame body; 111, rotating port; 112, third electrode sheet; 113, mounting groove; 12, mounting plate; 121, rotating column; 122, threaded hole; 123, fifth electrode sheet; 124, first electrode sheet; 125, second electrode sheet; 126, positioning groove; 13, bearing; 2, profiling block; 21, connecting plate; 211, connecting port; 22, electromagnet; 23, fourth electrode sheet; 3, positioning member; 31, first spring; 3 2. Positioning column; 4. Clamping part; 41. Quick clamp; 5. Drive motor; 6. Protective part; 61. Mounting seat; 611. Sliding groove; 612. Dovetail groove; 613. First placement groove; 614. Second placement groove; 615. Placement cavity; 62. Gravity sensor; 63. Support spring; 64. Platform; 65. Controller; 66. Lifting plate; 661. Dovetail block; 671. First rack; 672. Gear; 673. Second rack; 68. Pressure sensor. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The embodiment of the present application discloses an assembly tool for an automobile interior center beam.

[0034] Example 1 Reference Figure 1 and Figure 2 A vehicle interior center beam assembly tool includes a frame 1, a profiling block 2, a positioning piece 3 and a clamping piece 4.

[0035] Reference Figure 3 The frame 1 includes a frame body 11, a mounting plate 12, and a bearing 13. The frame body 11 is fixedly connected to the ground. A rotating opening 111 is provided on the inner wall of the frame body 11. The axis of the rotating opening 111 is vertical. There are two rotating openings 111, which are arranged opposite to each other and whose axes are collinear. The upper and lower ends of the mounting plate 12 are respectively fixedly connected to a rotating column 121, which is coaxially arranged in the rotating opening 111. The outer wall of the bearing 13 is fixedly connected to the inner wall of the rotating opening 111, and the outer wall of the rotating column 121 is fixedly connected to the inner wall of the bearing 13.

[0036] Reference Figure 4 The mounting plate 12 is embedded in the shielding plate, and multiple threaded holes 122 are provided on both sides of the mounting plate 12. The multiple threaded holes 122 are respectively provided on both sides of the shielding plate. The outer wall of the profiling block 2 is fixedly connected with a connecting plate 21. The connecting plate 21 is provided with a connecting port 211. The screw passes through the connecting port 211 and is threadedly connected to the inner wall of the threaded hole 122 to complete the fixation of the profiling block 2.

[0037] Reference Figure 2 An electromagnet 22 is fixedly connected to the profiling block 2. A fourth electrode sheet 23 is fixedly connected to the end of the profiling block 2 facing the mounting plate 12. The electromagnet 22 is electrically connected to the fourth electrode sheet 23. A fifth electrode sheet 123 is fixedly connected to the end of the mounting plate 12 facing the profiling block 2. When the profiling block 2 is fixed to the mounting plate 12, the fourth electrode sheet 23 is electrically connected to the fifth electrode sheet 123. Multiple profiling blocks 2 are provided, and multiple profiling blocks 2 are provided according to the required shape of the center beam.

[0038] Reference Figure 2 and Figure 3The outer wall of the rotating column 121 is fixedly connected with a first electrode sheet 124 and a second electrode sheet 125. The first electrode sheet 124 and the second electrode sheet 125 are arranged opposite each other. The first electrode sheet 124 is electrically connected to the fifth electrode sheet 123 on one side of the mounting plate 12, and the second electrode sheet 125 is electrically connected to the fifth electrode sheet 123 on the other side of the mounting plate 12. The first electrode sheet 124 and the second electrode sheet 125 are respectively electrically connected to the electromagnets 22 on both sides of the mounting plate 12.

[0039] A third electrode sheet 112 is fixedly connected to the inner wall of the rotating opening 111. When the third electrode sheet 112 abuts against the first electrode sheet 124 to achieve electrical connection, the electromagnet 22 connected to the first electrode sheet 124 is energized. When the third electrode sheet 112 abuts against the second electrode sheet 125 to achieve electrical connection, the electromagnet 22 connected to the second electrode sheet 125 is energized. This allows the center beam to be assembled on one side of the mounting plate 12, while unloading is performed on the other side of the mounting plate 12.

[0040] Reference Figure 3 The cam 32 is fixed on the top of the cam 32 and is fixed on the top of the cam 32. The cam 32 is fixed on the top of the cam 32 and is fixed on the cam 32.

[0041] Reference Figure 1 and Figure 2 The clamping member 4 is set as a quick clamp 41, and a plurality of quick clamps 41 are provided. The plurality of quick clamps 41 are fixedly connected to both sides of the mounting plate 12, and the plurality of quick clamps 41 on each side are arranged on the outer periphery of the profiling block 2. The quick clamps 41 abut the various components of the center beam against the profiling block 2 to complete the clamping and fixing of the center beam.

[0042] The operating principle of Example 1 of the present application is as follows: the rotating column 121 rotates, causing one side of the mounting plate 12 to be energized and the other side to be de-energized. The electromagnet 22 on the energized side is energized to generate a magnetic force. At this time, a first spring 31 stretches, causing the positioning column 32 to engage the positioning slot 126. The other first spring 31 contracts, increasing the rotational resistance of the rotating column 121, reminding the operator that it has rotated to the correct position. The staff member stands on the energized side, moves one side of the center beam close to the profiling block 2, so that the plate body fits the profiling block 2, and fixes the one side of the center beam with the quick clamp 41. The panel on the other side of the center beam is moved close to the profiling block 2, so that the plate body fits the profiling block 2, and the quick clamp 41 fixes the other side of the center beam. Then, the connecting plate 21 is abutted against the upper end face of the profiling block 2 facing away from the mounting plate 12. The staff member operates the connecting plate 21 to connect the two side panels to complete the assembly. The de-energized side can be unloaded mechanically or manually.

[0043] Example 2 Reference Figure 2 and Figure 3 This embodiment differs from the first embodiment in that the vehicle interior center beam assembly tool further includes a drive motor 5 and a protective member 6. The motor housing of the drive motor 5 is fixedly connected to the upper end of the frame 11, and the motor shaft of the drive motor 5 is coaxially fixedly connected to the rotating column 121. Two protective members 6 are provided, one on each side of the frame 1.

[0044] Reference Figure 2 and Figure 5 The protective member 6 includes a mounting seat 61 , a gravity sensor 62 , a support spring 63 , a platform 64 , a controller 65 , a lifting plate 66 , a first rack 671 , a gear 672 , a second rack 673 and a pressure sensor 68 .

[0045] Reference Figure 2 The mounting base 61 is fixedly connected to the ground, a sliding groove 611 is provided at the upper end of the mounting base 61, the gravity sensor 62 is fixedly connected to the bottom of the sliding groove 611, one end of the support spring 63 is fixedly connected to the upper end of the gravity sensor 62, and the other end of the support spring 63 is fixedly connected to the platform 64, the platform 64 is slidably connected to the groove wall of the sliding groove 611, the sliding direction of the platform 64 is vertical, the gravity sensor 62 is electrically connected to the controller 65, and the controller 65 is electrically connected to the drive motor 5.

[0046] Reference Figure 2 and Figure 5 A dovetail groove 612 is provided on the outer wall of the mounting seat 61 facing the frame 11, and a dovetail block 661 is fixedly connected to the outer wall of the lifting plate 66. The dovetail block 661 is slidably connected to the groove wall of the dovetail groove 612. The lifting plate 66 is slidably connected to the outer wall of the mounting seat 61 facing the frame 1. The sliding direction of the lifting plate 66 is vertical. The lifting plate 66 is used to prevent the mounting plate 12 from rotating.

[0047] The mounting seat 61 is provided with a first placement groove 613 on the outer wall facing the frame 1, and the sliding groove 611 is provided with a second placement groove 614 on the groove wall away from the frame 1. The mounting seat 61 is provided with a placement cavity 615. The first placement groove 613 and the second placement groove 614 are connected to the placement cavity 615. The first rack 671 is slidably connected to the groove wall of the first placement groove 613, and the second rack 673 is slidably connected to the groove wall of the second placement groove 614. The sliding directions of the first rack 671 and the second rack 673 are both vertical. The gear 672 rotates around its own axis and is connected to the inner wall of the placement cavity 615. The first rack 671 and the second rack 673 are respectively engaged with the two ends of the gear 672. The pressure sensor 68 is fixedly connected to one end of the lifting plate 66 facing the frame 1. There are four pressure sensors 68. Two pressure sensors 68 are connected to each lifting plate 66. The two pressure sensors 68 are respectively close to the two ends of the lifting plate 66 in the length direction. The pressure sensor 68 is used for abutment with the mounting plate 12. The pressure sensor 68 is electrically connected to the controller 65.

[0048] The implementation principle of Example 2 is: the drive motor 5 controls the intermittent rotation of the rotating column 121, so that both sides of the mounting plate 12 are intermittently energized, and there is no need for manual control of the rotation, thereby improving processing efficiency. The user stands on the platform 64 to complete the loading, assembly and unloading of the middle beam. When the user stands on the platform 64, the gravity sensor 62 sends a signal to the controller 65, so that the drive motor 5 does not start. If the gravity sensor 62 fails, the drive motor 5 starts, and the mounting plate 12 rotates to abut against the lifting plate 66 that is sliding up at this time. The pressure sensor 68 sends a signal to the controller 65, so that the drive motor 5 stops starting, thereby reducing accidental injury to staff.

[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An assembly tool for an automobile interior center beam, characterized by: The invention comprises a frame (1), a profile block (2) and a clamping member (4), wherein the frame (1) comprises a frame body (11) and a mounting plate (12), both ends of the mounting plate (12) are fixedly connected with a rotating column (121), the rotating column (121) is connected to the inner wall of the frame body (11) by rotating around its own axis, a plurality of profile blocks (2) are provided, a plurality of clamping members (4) are provided, the profile block (2) and the clamping member (4) are fixedly connected to both sides of the mounting plate (12), the profile block (2) is used for positioning and installing various components of the center beam, the clamping member (4) is provided on the outer periphery of the profile block (2), and the clamping member (4) is used for clamping and fixing the center beam.

2. The automobile interior center beam assembly tool according to claim 1, characterized in that: The frame (1) further comprises a bearing (13); the inner wall of the frame body (11) is provided with a rotating opening (111); the outer wall of the bearing (13) is fixedly connected to the inner wall of the rotating opening (111); and the outer wall of the rotating column (121) is fixedly connected to the inner wall of the bearing (13).

3. The automobile interior center beam assembly tool according to claim 2, characterized in that: An electromagnet (22) is fixedly connected inside the profiling block (2); a first electrode sheet (124) and a second electrode sheet (125) are fixedly connected to the outer wall of the rotating column (121); the first electrode sheet (124) and the second electrode sheet (125) are arranged opposite each other; the first electrode sheet (124) and the second electrode sheet (125) are electrically connected to the electromagnets (22) on both sides of the mounting plate (12), respectively; a third electrode sheet (112) is fixedly connected to the inner wall of the rotating opening (111); when the third electrode sheet (112) and the first electrode sheet (124) are in contact with each other to achieve electrical connection, the electromagnet (22) connected to the first electrode sheet (124) is energized; and when the third electrode sheet (112) and the second electrode sheet (125) are in contact with each other to achieve electrical connection, the electromagnet (22) connected to the second electrode sheet (125) is energized.

4. The automobile interior center beam assembly tool according to claim 3, characterized in that: The profiling block (2) is detachably connected to the mounting plate (12); a fourth electrode sheet (23) is fixedly connected to the outer wall of the profiling block (2); the fourth electrode sheet (23) is electrically connected to the electromagnet (22); a fifth electrode sheet (123) is fixedly connected to the outer wall of the mounting plate (12); the fifth electrode sheet (123) is electrically connected to the first electrode sheet (124) or the second electrode sheet (125).

5. The automobile interior center beam assembly tool according to claim 3, characterized in that: The invention also includes a positioning member (3), wherein the positioning member (3) includes a first spring (31) and a positioning column (32); the inner wall of the rotating mouth (111) is provided with a mounting groove (113); one end of the first spring (31) is fixedly connected to the bottom of the mounting groove (113); the other end of the first spring (31) is fixedly connected to the positioning column (32); the positioning column (32) is slidably connected to the groove wall of the mounting groove (113); the outer wall of the rotating column (121) is provided with a positioning groove (126); the positioning groove (126) is used for the positioning column (32) to extend into; the electromagnet (22) adsorbs the first spring (31) after being energized; and the end of the positioning column (32) facing away from the first spring (31) is set as a spherical surface.

6. The automobile interior center beam assembly tool according to claim 1, characterized in that: It also includes a drive motor (5), wherein a motor housing of the drive motor (5) is fixedly connected to the frame (11), and a motor shaft of the drive motor (5) is coaxially fixedly connected to the rotating column (121).

7. The automobile interior center beam assembly tool according to claim 6, characterized in that: The invention also includes a protective member (6), which is arranged on one side of the frame (1). The protective member (6) includes a mounting seat (61), a gravity sensor (62), a support spring (63), a platform (64) and a controller (65). The mounting seat (61) is fixedly connected to the ground. The upper end of the mounting seat (61) is provided with a sliding groove (611). The gravity sensor (62) is fixedly connected to the bottom of the sliding groove (611). One end of the support spring (63) is fixedly connected to the upper end of the gravity sensor (62). The other end of the support spring (63) is fixedly connected to the platform (64). The platform (64) is slidably connected to the groove wall of the sliding groove (611). The gravity sensor (62) is electrically connected to the controller (65), and the controller (65) is electrically connected to the drive motor (5).

8. The automobile interior center beam assembly tool according to claim 7, characterized in that: The protective member (6) further comprises a lifting plate (66), wherein the lifting plate (66) is slidably connected to the outer wall of the mounting seat (61) facing the frame (1), and the sliding direction of the lifting plate (66) is vertical. The lifting plate (66) is used to prevent the mounting plate (12) from rotating.

9. The automobile interior center beam assembly tool according to claim 8, characterized in that: The protective member (6) further includes a first rack (671), a gear (672) and a second rack (673); the mounting seat (61) is provided with a first placement groove (613) on the outer wall facing the frame (1); the sliding groove (611) is provided with a second placement groove (614) on the groove wall facing away from the frame (1); the mounting seat (61) is provided with a placement cavity (615); the first placement groove (613) and the second placement groove (614) are connected to the placement cavity (615); the first rack (671) is slidably connected to the groove wall of the first placement groove (613); the second rack (673) is slidably connected to the groove wall of the second placement groove (614); the sliding directions of the first rack (671) and the second rack (673) are both vertical; the gear (672) rotates around its own axis and is connected to the inner wall of the placement cavity (615); the first rack (671) and the second rack (673) are respectively engaged with the two ends of the gear (672).

10. The automobile interior center beam assembly tool according to claim 8, characterized in that: The protective member (6) further includes a pressure sensor (68), which is fixedly connected to one end of the lifting plate (66) facing the frame (1), and the pressure sensor (68) is used for abutment by the mounting plate (12). The pressure sensor (68) is electrically connected to the controller (65).

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