An automatic assembly equipment for anti-static junction box

Abstract

The application belongs to the technical field of special operation robots, and particularly relates to an automatic assembly equipment for anti-static wiring boxes, which comprises a processing component, a transfer component, a feeding component and a power component, wherein the power component is arranged at the bottom of the transfer component, the feeding component is arranged at the right side of the transfer component, and the processing component is arranged at the left side of the transfer component; the transfer component comprises a container, a side pushing component, a vertical pushing component and an inner clamping component. Since the box body is clamped by the inner clamping components on both sides through counterweight clamping plates in the inside of the accommodating groove, and the counterweight clamping plates will re-clamp the side edges of the box body after each processing, the problem that the box body cannot be clamped due to the change of the appearance after processing will not occur, the deviation phenomenon of the box body due to centrifugal force or contact stress of the related processing components is eliminated, and the actual processing precision of the processing component is ensured.

Description

Technical Field

[0001] This invention belongs to the field of special operation robot technology, specifically an automatic assembly equipment for anti-static junction boxes. Background Technology

[0002] The automatic junction box assembly machine is a specialized automated device for junction box production. It aims to improve production efficiency and product consistency by replacing traditional manual assembly with mechanized operations. This equipment integrates multiple automated modules, including feeding, assembly, inspection, and packaging, realizing a fully automated production process for junction boxes from parts to finished products.

[0003] There is a fully automated photovoltaic junction box assembly equipment with publication number CN120772144A. This equipment adopts a central rotating platform layout. The compact design allows each workstation to be closely surrounded, which greatly shortens the material transfer path and flow time and optimizes the production cycle. However, when the CNC turntable is centrifugally rotating, the box placed on the upper surface may shift due to centrifugal force or contact stress of related robotic arms, resulting in a large error in the subsequent part processing accuracy. Therefore, improvements are needed. Summary of the Invention

[0004] To address the problem of centrifugal displacement of placed junction boxes caused by the rotation of existing CNC rotary tables, the technical solution adopted in this invention is: an automatic assembly equipment for anti-static junction boxes, comprising a processing component, a transfer component, a feeding component, and a power component, wherein the power component is located at the bottom of the transfer component, the feeding component is located on the right side of the transfer component, and the processing component is located on the left side of the transfer component. The transfer component includes a container tray, a side-pushing component, a vertical-pushing component, and an inner clamping component: The outer surface of the container is uniformly provided with receiving grooves, and the two sides of the receiving grooves are symmetrically provided with side openings. The inner cavity of the container is provided with a planar cut on the side near the receiving groove. The side-pushing component is set in the inner cavity of the container tray through a planar cut. The inner clamping component is symmetrically set on both sides of the receiving groove through a side opening. The vertical pushing component is set inside the container tray. The container tray holds the junction box through the receiving groove. The junction box is vertically pushed by the vertical pushing component, the junction box is stabilized inside the receiving groove by the inner clamping component, and the junction box is pushed out of the receiving groove by the side-pushing component.

[0005] Furthermore, the vertical pushing component includes: The bottom pusher is installed in the inner cavity of the container. Air inlets are evenly opened on both sides of the outer shell of the bottom pusher, and compression push rods are evenly inserted into the top of the inner cavity of the bottom pusher. The bottom pusher is remotely controlled by an external device, and the air pump inside draws air from the air inlets on both sides to pressurize or apply pressure to the compression push rods. A flat sliding plate, wherein the outer surface of the flat sliding plate is slidably connected to the inner wall of the receiving groove, the top end of the compression push rod extends into the interior of the receiving groove, and the lower surface of the flat sliding plate is inserted into the top end of the compression push rod.

[0006] Furthermore, the inner clamping component includes: A transverse push plate, wherein vertical connecting plates are evenly arranged on the top of the inner cavity of the transverse push plate through a guide groove; The counterweight clamp has evenly spaced adsorption grooves on its outer surface near the receiving groove. Infrared detectors are evenly arranged on the outer surface of the counterweight clamp near the receiving groove. The outer surface of the counterweight clamp is slidably connected to the inner wall of the side opening, and the outer surface of the counterweight clamp away from the receiving groove is inserted into the top of the vertical connecting plate. When the counterweight clamp is about to approach the box inside the receiving groove, it will sense the distance through the infrared detector and remotely control the horizontal moving push plate to adjust the speed. The counterweight clamp adheres to the outer surface of the box through its adsorption grooves to achieve the clamping effect.

[0007] Furthermore, the side-pushing component includes: A remote control lever, wherein a vertical lever is slidably connected to the top of the inner cavity of the remote control lever; A face-fitting push plate is set at the top of the vertical tie rod, and the lower surface of the face-fitting push plate is slidably connected to the upper surface of the container tray through a planar cut.

[0008] Furthermore, the veneer pusher includes: A sliding housing, the lower surface of which is inserted into the top of a vertical pull rod via a socket; An inner sliding magnetic block, wherein the outer surface of the inner sliding magnetic block is slidably connected to the inner wall of the sliding outer shell; An internal pull plate is included, with its outer surface inserted into the inner wall of the sliding housing. Rubber connecting tubes are evenly inserted into the inner cavity of the internal pull plate near the inner sliding magnetic block. The end of the rubber connecting tube away from the internal pull plate is inserted into the outer surface of the inner sliding magnetic block. When the sliding housing presses the rubber connecting tube, the rubber connecting tube contracts, pulling the inner sliding magnetic block towards the receiving groove. Figure 7 As shown, this causes the box inside the receiving groove to be magnetically attracted, causing the box to slide deeper into the receiving groove, thus solving the problem of the box sliding due to centrifugal force.

[0009] Furthermore, the power component includes: A torsion outer disk, the upper surface of which is rotatably connected to the upper surface of the container tray; The built-in turntable has its outer surface rotatably connected to the axis of the inner cavity of the torsion outer disc via a transition groove.

[0010] Furthermore, the power component also includes: A connecting column is provided, the bottom end of which is inserted into the center of the upper surface of the built-in turntable, the outer surface of which is inserted into the center of the inner wall of the container, and miniature monitoring heads are evenly arranged on the top of the connecting column.

[0011] Furthermore, it also includes a material distribution component: The material dispensing component has: The guide rail has symmetrically arranged transmission rollers at both ends. The interface of the guide rail can be connected to the receiving groove of the container tray. The box component that slides out from the lowest point of the receiving groove can enter the interior of the guide rail. A transmission belt, wherein the outer surface of the transmission belt is rotatably connected to the inner wall of the guide rail, and the outer surface of the transmission roller shaft is rollingly connected to the inner wall of the transmission belt; The scanning plate is located on the inner wall of the guide rail, near the container tray.

[0012] Furthermore, the material dispensing component also includes: An external lifting device, wherein a torque arm is slidably connected to the top of the external lifting device; The contact push plate has its upper surface inserted into the end of the torque arm away from the external lifting device.

[0013] The beneficial effects of this invention are as follows: 1. This device can place the junction box housing to be processed in the receiving groove for rotational transport, thereby transporting the box to the location of each processing component for individual assembly and processing. Since the box is held by the inner clamping components on both sides of the receiving groove through the counterweight clamping plate, and the counterweight clamping plate will re-clamp and fix the sides of the box after each processing, there will be no problem of the box being unable to be clamped due to changes in shape after processing. At the same time, it eliminates the displacement phenomenon of the box due to centrifugal force or contact stress of related processing components, ensuring the actual processing accuracy of the processing components.

[0014] 2. Each time the counterweight clamping plate approaches the side of the box for clamping, the transverse push plate can adjust the advancing distance of the counterweight clamping plate through the infrared detector. This ensures that the counterweight clamping plate decelerates when it is about to approach the side of the box, ensuring that the box is clamped without causing excessive squeezing force on the outer surface of the box, thus avoiding damage to the box. It also avoids the problem of unstable clamping of the box due to a short advancing distance.

[0015] 3. The side-pushing component can push the finished distribution box outward from the container tray, achieving the effect of transferring the distribution box. Due to the modification of the interior of the sliding shell, the magnetic attraction of the inner sliding magnetic block can make the box slide closer to the axis of the container tray after each processing, thereby correcting the distance of the box offset outward due to the centrifugal rotation of the container tray, so that the box is always stable inside the receiving groove, avoiding the problem of the box gradually sliding outward from the receiving groove due to centrifugal force. At the same time, the sliding shell can pull the inner sliding magnetic block away from the box through the built-in pull plate, thereby greatly reducing the magnetic attraction effect and enabling the sliding shell to have the normal function of pushing the box.

[0016] 4. When the box is pushed out from the receiving slot, it will fall onto the upper surface of the scanning plate, then enter the interior of the guide rail, and then be carried away by the rotating transmission belt. At this time, the scanning plate performs a counting function. The external lifting device can press the contact push plate down onto the upper surface of the box by controlling the movement of the torque arm, and then push it into the interior of the guide rail, thereby helping the box to be transferred from the scanning plate to the top of the transmission belt, preventing the box from getting stuck at the interface between the guide rail and the container tray. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention; Figure 2 This is a cross-sectional view of the transfer component of the present invention; Figure 3 This is a cross-sectional view of the container tray of the present invention; Figure 4 This is a schematic diagram of the vertical push component of the present invention; Figure 5 This is a schematic diagram of the structure of the internal clamping component of the present invention; Figure 6 This is a schematic diagram of the side-push component of the present invention; Figure 7 This is a cross-sectional view of the sliding housing of the present invention; Figure 8 This is a schematic diagram of the power component of the present invention; Figure 9 This is a schematic diagram of the material distribution component of the present invention.

[0018] In the diagram: 1. Transfer component; 2. Power component; 3. Material distribution component; 4. Feeding component; 5. Processing component; 11. Container tray; 12. Side push component; 13. Vertical push component; 14. Internal clamping component; 111. Receiving groove; 112. Planar cut; 113. Side opening; 131. Bottom push component; 132. Compression push rod; 133. Planar sliding plate; 141. Horizontal push plate; 142. Vertical connecting plate; 143. Counterweight clamping plate; 144. Adsorption groove; 45. Infrared detector; 121. Remote control lever; 122. Vertical lever; 15. Surface push plate; 151. Sliding housing; 152. Built-in pull plate; 153. Rubber connecting pipe; 154. Inner sliding magnetic block; 21. Torsional outer disc; 22. Built-in turntable; 23. Connecting column; 24. Miniature monitoring head; 31. Guide slide rail; 32. Transmission roller; 33. Transmission belt; 34. Scanning plate; 35. External lifting device; 36. Torque arm; 37. Contact push plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0020] Example 1, please refer to Figures 1-6 This invention provides a technical solution: an automatic assembly equipment for anti-static junction boxes, comprising a processing component 5, a transfer component 1, a feeding component 4, and a power component 2, wherein the power component 2 is located at the bottom of the transfer component 1, the feeding component 4 is located on the right side of the transfer component 1, and the processing component 5 is located on the left side of the transfer component 1. The transfer component 1 includes a container tray 11, a side-pushing component 12, a vertical-pushing component 13, and an inner clamping component 14. The outer surface of the container tray 11 is uniformly provided with receiving grooves 111, and the two sides of the receiving grooves 111 are symmetrically provided with side openings 113. The inner cavity of the container tray 11 is provided with a planar cut 112 on the side near the receiving grooves 111. The side-pushing component 12 is set in the inner cavity of the container tray 11 through the planar cut 112. The inner clamping component 14 is symmetrically arranged on both sides of the receiving groove 111 through the side opening 113. The vertical pushing component 13 is set inside the container tray 11. The container tray 11 holds the junction box through the receiving groove 111. The vertical pushing component 13 pushes the junction box vertically, the inner clamping component 14 stabilizes the junction box inside the receiving groove 111, and the side-pushing component 12 pushes the junction box out of the receiving groove 111.

[0021] Vertical push component 13 includes: The bottom pusher element 131 is installed in the inner cavity of the container tray 11. Air inlets are evenly opened on both sides of the outer shell of the bottom pusher element 131, and compression push rods 132 are evenly inserted into the top of the inner cavity of the bottom pusher element 131. The bottom pusher element 131 is remotely controlled by an external device, and the internal air pump draws air from the air inlets on both sides to perform suction or pressurization work on the compression push rods 132. The outer surface of the flat slide plate 133 is slidably connected to the inner wall of the receiving groove 111, the top end of the compression push rod 132 extends into the interior of the receiving groove 111, and the lower surface of the flat slide plate 133 is inserted into the top end of the compression push rod 132.

[0022] The inner clamping component 14 includes: A transverse push plate 141 has vertical connecting plates 142 evenly arranged on the top of its inner cavity via guide grooves. The counterweight clamping plate 143 has evenly spaced adsorption grooves 144 on its outer surface near the receiving groove 111. Infrared detectors 145 are evenly arranged on the outer surface of the counterweight clamping plate 143 near the receiving groove 111. The outer surface of the counterweight clamping plate 143 is slidably connected to the inner wall of the side opening 113, and the outer surface of the counterweight clamping plate 143 away from the receiving groove 111 is inserted into the top of the vertical connecting plate 142. When the counterweight clamping plate 143 is about to approach the box inside the receiving groove 111, it will sense the distance through the infrared detector 145 and remotely control the horizontal moving push plate 141 to adjust the speed. The counterweight clamping plate 143 is adsorbed on the outer surface of the box through its adsorption grooves 144 to achieve the clamping effect.

[0023] The side thrust component 12 includes: The remote control lever 121 has a vertical lever 122 slidably connected to the top of its inner cavity; A face-applied push plate 15 is set at the top of the vertical tie rod 122, and the lower surface of the face-applied push plate 15 is slidably connected to the upper surface of the container tray 11 through a planar cutout 112.

[0024] The box is transferred to the receiving slot 111 of the container tray 11 by the feeding component 4 on the right. Then, the container tray 11 rotates counterclockwise under the control of the power component 2. When it rotates to the position of the processing component 5, the box is installed with parts, screws are tightened and assembled. If the product is qualified, the assembled box is transferred to the front material distribution component 3 for transfer. If the product is defective, the assembled box is transferred to the rear material distribution component 3 for transfer.

[0025] After the box enters the receiving groove 111, it is lifted by the bottom flat slide plate 133. Then, the inner clamping components 14 on both sides clamp the side parts of the box by synchronously pushing the counterweight clamping plates 143. Then, as the box rotates with the container tray 11, it maintains a relatively stable state inside the receiving groove 111. The box is transferred to the left side area. When the processing component 5 needs to perform related assembly work on the inside of the box, the transverse push plate 141 pulls open the counterweight clamping plates 143 on both sides. Then, the bottom push component 131 pressurizes the compression push rod 132 to lift the flat slide plate 133 upward until the flat slide plate 133 is flush with the upper surface of the container tray 11. At this time, the box is pushed upward out of the receiving groove 111, and the processing component 5 can process the box. When the box is about to be transferred after being processed by the processing component 5 in one go, the flat slide plate 133 is lowered, and the box is returned to the receiving groove 111.

[0026] After the box body is processed, the flat slide plate 133 first pushes the box body out of the receiving groove 111, and then the remote control pull rod 121 pulls the surface push plate 15 through the vertical pull rod 122, and pushes the box body into the guide slide rail 31 of the material distribution component 3 for transfer.

[0027] Example 2, please refer to Figures 1-9 The present invention provides a technical solution: based on embodiment 1, the bonding push plate 15 includes: The sliding housing 151 has its lower surface inserted into the top of the vertical pull rod 122 via a socket. The inner sliding magnetic block 154 has its outer surface slidably connected to the inner wall of the sliding outer shell 151. An internal pull plate 152 is inserted into the inner wall of the sliding housing 151 via its outer surface. Rubber connecting tubes 153 are evenly inserted into the inner cavity of the internal pull plate 152 near the inner sliding magnetic block 154. The end of the rubber connecting tube 153 away from the internal pull plate 152 is inserted into the outer surface of the inner sliding magnetic block 154. When the sliding housing 151 presses the rubber connecting tube 153, the rubber connecting tube 153 contracts, pulling the inner sliding magnetic block 154 towards the receiving groove 111. Figure 7 As shown, this causes the box inside the receiving groove 111 to be magnetically attracted, causing the box to slide into a deeper position in the receiving groove 111, thereby solving the problem of the box sliding due to centrifugal force.

[0028] Power component 2 includes: The outer rotating disk 21 is rotatably connected to the upper surface of the container disk 11. The built-in turntable 22 has its outer surface rotatably connected to the axis of the inner cavity of the torsion outer disc 21 via a transition groove.

[0029] Power component 2 also includes: The connecting column 23 is connected to the axis of the upper surface of the built-in turntable 22 at its bottom end, and to the axis of the inner wall of the container 11 at its outer surface. Miniature monitoring heads 24 are evenly arranged on the top of the connecting column 23.

[0030] It also includes material distribution component 3: The material distribution component 3 has: The guide slide rail 31 has drive rollers 32 symmetrically arranged at both ends. The interface of the guide slide rail 31 can be connected to the receiving groove 111 of the container tray 11. The box component that slides out from the lowest point of the receiving groove 111 can enter the interior of the guide slide rail 31. The outer surface of the transmission belt 33 is rotatably connected to the inner wall of the guide rail 31, and the outer surface of the transmission roller shaft 32 is rollingly connected to the inner wall of the transmission belt 33. The scanning plate 34 is located on the inner wall of the guide rail 31 near the container tray 11.

[0031] The material distribution component 3 also includes: External lifting device 35, with a torque arm 36 slidably connected to the top of the external lifting device 35; Contact push plate 37, the upper surface of contact push plate 37 is inserted into the end of torque arm 36 away from external lifting device 35.

[0032] Since the sliding outer shell 151 is provided with an inner sliding magnetic block 154, each time the box is lifted out of the receiving groove 111, the inner sliding magnetic block 154 near the box will attract and pull the box towards the axis of the container tray 11, thereby correcting the distance by which the box is offset outward due to the centrifugal rotation of the container tray 11.

[0033] When the faceplate push plate 15 needs to push the box out of the container tray 11, the built-in pull plate 152 will pull the inner sliding magnetic block 154 away from the box by shrinking the rubber connecting tube 153, so that the inner sliding magnetic block 154 no longer has a magnetic attraction to the box, and the sliding shell 151 has normal pushing ability.

[0034] The outer rotating disc 21 drives the inner rotating disc 22 to rotate through the internal motor, thereby driving the connecting column 23 to achieve the effect of rotating the container tray 11. Each time the box slides out of the receiving slot 111, the connecting column 23 monitors the actual position of the box through the micro monitoring head 24 at the top, thereby cooperating with the side pushing component 12, the vertical pushing component 13 and the inner clamping component 14 to achieve the effect of accurately adjusting the position of the box.

[0035] When the box is pushed out from the receiving slot 111, it falls onto the upper surface of the scanning plate 34, then enters the guide rail 31, and is then carried away by the rotating transmission belt 33. At this time, the scanning plate 34 performs a counting function. The external lifting device 35 can press the contact push plate 37 down onto the upper surface of the box by controlling the movement of the torque arm 36, and then push it into the guide rail 31, thereby helping the box to be transferred from the scanning plate 34 to above the transmission belt 33.

[0036] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. An automatic assembly equipment for anti-static junction boxes, comprising a processing component (5), a transfer component (1), a feeding component (4), and a power component (2), wherein the power component (2) is disposed at the bottom of the transfer component (1), the feeding component (4) is disposed on the right side of the transfer component (1), and the processing component (5) is disposed on the left side of the transfer component (1): Its features are: The transfer component (1) includes a container (11), a side-pushing component (12), a vertical-pushing component (13), and an inner clamping component (14): The outer surface of the container (11) is uniformly provided with receiving grooves (111), and the two sides of the receiving grooves (111) are symmetrically provided with side openings (113). The inner cavity of the container (11) is provided with a planar cut (112) on the side near the receiving grooves (111). The side-pushing component (12) is set in the inner cavity of the container (11) through a planar cut (112). The inner clamping component (14) is symmetrically set on both sides of the receiving groove (111) through a side opening (113). The vertical pushing component (13) is set inside the container (11). The container (11) holds the junction box through the receiving groove (111). The junction box is vertically pushed by the vertical pushing component (13), the junction box is stabilized inside the receiving groove (111) by the inner clamping component (14), and the junction box is pushed out of the receiving groove (111) by the side-pushing component (12).

2. The automatic assembly equipment for anti-static junction boxes according to claim 1, characterized in that: The vertical pusher component (13) includes: Bottom pusher (131) is installed in the inner cavity of the container (11). The bottom pusher (131) has air inlets evenly opened on both sides of its outer shell, and compression pushers (132) are evenly inserted into the top of the inner cavity of the bottom pusher (131). A flat slide plate (133) has its outer surface slidably connected to the inner wall of a receiving groove (111), and the top end of a compression push rod (132) extends into the interior of the receiving groove (111), with the lower surface of the flat slide plate (133) inserted into the top end of the compression push rod (132).

3. The automatic assembly equipment for anti-static junction boxes according to claim 1, characterized in that: The inner clamping component (14) includes: A transverse push plate (141) has vertical connecting plates (142) evenly arranged on the top of its inner cavity through a guide groove. The counterweight clamp (143) has an adsorption groove (144) evenly opened on the side of the outer surface of the counterweight clamp (143) near the receiving groove (111). An infrared detector (145) is evenly arranged on the side of the outer surface of the counterweight clamp (143) near the receiving groove (111). The outer surface of the counterweight clamp (143) is slidably connected to the inner wall of the side opening (113), and the outer surface of the counterweight clamp (143) away from the receiving groove (111) is inserted into the top of the vertical connecting plate (142).

4. The automatic assembly equipment for anti-static junction boxes according to claim 1, characterized in that: The side-push component (12) includes: A remote control lever (121) has a vertical lever (122) slidably connected to the top of its inner cavity. A face-fitting push plate (15) is set on top of the vertical tie rod (122), and the lower surface of the face-fitting push plate (15) is slidably connected to the upper surface of the container (11) through a planar cut (112).

5. The automatic assembly equipment for anti-static junction boxes according to claim 4, characterized in that: The veneer push plate (15) includes: A sliding housing (151) has its lower surface inserted into the top of a vertical pull rod (122) via a socket. An inner sliding magnetic block (154) is provided, the outer surface of which is slidably connected to the inner wall of the sliding outer shell (151). An internal pull plate (152) is inserted into the inner wall of the sliding outer shell (151) on its outer surface. A rubber connecting tube (153) is evenly inserted into the inner cavity of the internal pull plate (152) near the inner sliding magnetic block (154). The end of the rubber connecting tube (153) away from the internal pull plate (152) is inserted into the outer surface of the inner sliding magnetic block (154).

6. The automatic assembly equipment for anti-static junction boxes according to claim 1, characterized in that: The power component (2) includes: The upper surface of the torsion outer disk (21) is rotatably connected to the upper surface of the container disk (11); The built-in turntable (22) has its outer surface rotatably connected to the axis of the inner cavity of the torsion outer disk (21) via a transition groove.

7. The automatic assembly equipment for anti-static junction boxes according to claim 6, characterized in that: The power component (2) also includes: A connecting column (23) is provided. The bottom end of the connecting column (23) is inserted into the center of the upper surface of the built-in turntable (22). The outer surface of the connecting column (23) is inserted into the center of the inner wall of the container (11). Miniature monitoring heads (24) are evenly provided on the top of the connecting column (23).

8. The automatic assembly equipment for anti-static junction boxes according to claim 1, characterized in that: It also includes a material distribution component (3): The material distribution component (3) has: Guide slide rail (31), with drive rollers (32) symmetrically arranged at both ends of the guide slide rail (31); The outer surface of the transmission belt (33) is rotatably connected to the inner wall of the guide rail (31), and the outer surface of the transmission roller shaft (32) is rollingly connected to the inner wall of the transmission belt (33). The scanning plate (34) is set on the inner wall of the guide rail (31) near the container tray (11).

9. The automatic assembly equipment for anti-static junction boxes according to claim 8, characterized in that: The material distribution component (3) also includes: An external lifting device (35) is slidably connected to a torque arm (36) at its top. Contact push plate (37), the upper surface of which is inserted into the end of torque arm (36) away from the external lifting device (35).

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