Trolley side plate positioning and clamping device

Abstract

The utility model provides a trolley side plate positioning and clamping device, and relates to the technical field of hoisting equipment machining structures. The trolley side plate positioning and clamping device comprises a center positioning structure and an auxiliary supporting structure. The center positioning structure is installed on the rotating table, and the center axis of the center positioning structure coincides with the rotating axis of the rotating table. The upper end of the center positioning structure is provided with a positioning part and a pressing piece, the positioning part is used for being clamped in the through hole so that the trolley side plate can be positioned at the position where the axis of the through hole coincides with the center axis of the center positioning structure, and then the through hole of the trolley side plate and the rotating axis of the rotating table are coaxially arranged. The lower end of the auxiliary supporting structure is provided with a connecting part fixedly connected with the rotating table, the upper end of the auxiliary supporting structure is provided with a clamping part for clamping one side of the trolley side plate, and therefore stable positioning of the trolley side plate is achieved through the cooperation effect of the center positioning structure and the auxiliary supporting structure; and therefore, the side plate of the trolley can be clamped and fixed on the welding equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of processing structures of lifting equipment, and more specifically, to a positioning and clamping device for the side plate of a trolley. Background Art

[0002] For the trolley side plate component of the shore crane of port lifting equipment, before the trolley structure is formed, assembled and welded, the heavy plates on both sides of the trolley side plate need to be assembled and spot-welded to the side plate first. Previously, in the structure workshop, on-site welders manually welded the welds that needed to be welded between the trolley side plate and the heavy plate. This operation mode has low efficiency, and the formed manual welds are not beautiful enough. There is a large amount of grinding work after welding. Now, the structure workshop has introduced CJP (groove welding with complete penetration of the groove) welding robots, and the workshop plans to weld the heavy plates on the trolley side plate on the CJP welding robot production line.

[0003] This robot welding equipment is equipped with a robot welding rotating arm, a rotating table and a hydraulic clamping device. However, due to the special structure of the trolley side plate, it is difficult for the hydraulic clamping device equipped on the welding equipment to position the trolley side plate. Therefore, in order to solve the productivity problem of welding the heavy plates on the trolley side plate on the CJP welding robot production line, a clamping device needs to be designed to keep the clamping position of the trolley side plate consistent, so that when the robot is welding, it can accurately find the edge according to the welding track generated by the computer, and avoid the phenomenon of the welding torch deviating from the position. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a positioning and clamping device for the trolley side plate, which can effectively realize the clamping and fixing of the trolley side plate on the welding equipment.

[0005] The embodiments of the utility model can be realized in the following ways:

[0006] A positioning and clamping device for the trolley side plate, the positioning and clamping device for the trolley side plate is used to position and install the trolley side plate on the rotating table of the welding equipment, and the trolley side plate has a through hole; the positioning and clamping device for the trolley side plate includes:

[0007] A central positioning structure, the central positioning structure is installed on the rotating table, and the central axis of the central positioning structure coincides with the rotation axis of the rotating table; the upper end of the central positioning structure has a positioning part and a pressing part, and the positioning part is used to be clamped in the through hole so that the trolley side plate is positioned at a position where the axis of the through hole coincides with the central axis of the central positioning structure; and

[0008] Auxiliary support structure, the lower end of the auxiliary support structure has a connecting part, and the connecting part is used for fixedly connecting with the rotating table; the upper end of the auxiliary support structure has a clamping part, and the clamping part is used for clamping one side of the side plate of the trolley.

[0009] Optionally, a positioning protrusion is provided at the lower end of the center positioning structure, and the positioning protrusion is a strip-shaped protrusion intersecting the central axis of the center positioning structure; a positioning groove is provided on the rotating table, and the positioning groove is a strip-shaped groove intersecting the rotation axis of the rotating table, and the positioning groove cooperates with the strip-shaped groove.

[0010] Optionally, a first hydraulic jaw and a second hydraulic jaw are provided on the rotating table on both sides of the positioning groove, and the first hydraulic jaw and the second hydraulic jaw clamp the lower end of the center positioning structure to make the central axis of the center positioning structure coincide with the rotation axis of the rotating table.

[0011] Optionally, the center positioning structure further includes a center column and a support bottom plate provided at the lower end of the center column, and the support bottom plate is square; the positioning protrusion is provided on the lower side of the support bottom plate, and the positioning protrusion extends from one side of the support bottom plate to the other side; the first hydraulic jaw and the second hydraulic jaw are used for relatively clamping on both sides of the support bottom plate.

[0012] Optionally, the center positioning structure further includes a positioning main body, and the positioning part is provided on the positioning main body; the pressing member includes a locking screw, a pressing plate and a sleeve rod; the locking screw is screwed and fixed on the positioning main body, and the locking screw is used to extend from the through hole to above the side plate of the trolley when the positioning part cooperates with the through hole; the pressing plate is installed on the upper end of the locking screw through the sleeve rod and is used for pressing the side plate of the trolley on the positioning main body.

[0013] Optionally, the positioning part is detachably installed on the positioning main body.

[0014] Optionally, the connecting part is fixedly installed on the rotating table through a locking screw; a plurality of threaded holes are provided on the rotating table, and the plurality of threaded holes are distributed along the direction close to the center positioning structure, so that when the locking screw is screwed and fixed to different threaded holes to fix the auxiliary support structure, the distance between the auxiliary support structure and the center positioning structure is different.

[0015] Optionally, the auxiliary support structure further includes a nut seat and a trapezoidal screw. The nut seat forms the connecting portion, and a trapezoidal nut is provided on the nut seat. The trapezoidal screw is screwed with the trapezoidal nut. The clamping portion is rotatably mounted on the upper end of the trapezoidal screw so as to drive the clamping portion to move up and down when the trapezoidal screw rotates relative to the trapezoidal nut.

[0016] Optionally, the upper end of the trapezoidal screw has an annular groove provided along the circumferential direction of the trapezoidal screw. The clamping portion includes a main rod and a positioning bolt. A groove is provided at the lower end of the main rod, and a plurality of mounting holes communicating with the groove are provided along the circumferential direction of the main rod. The upper end of the trapezoidal screw is inserted into the groove, the positioning bolt is installed in the mounting hole, and one end of the positioning bolt extends into the groove and is clamped with the annular groove so that the clamping portion is rotatably connected to the trapezoidal screw.

[0017] Optionally, the clamping portion includes a connecting plate, a first locking bolt, a second locking bolt, and a first clamping plate and a second clamping plate connected to the connecting plate. The first clamping plate and the second clamping plate are arranged opposite to each other up and down to form a clamping space for clamping the side plate of the trolley between the first clamping plate and the second clamping plate. The first locking bolt is screwed to the first clamping plate and is used to press down the side plate of the trolley. The second locking bolt is screwed to the second clamping plate and is used to jack up the side plate of the trolley to clamp the side plate of the trolley between the first locking bolt and the second locking bolt.

[0018] The beneficial effects of the trolley side plate positioning and clamping device provided by the embodiment of the present invention include:

[0019] The embodiment of the present invention provides a trolley side plate positioning and clamping device, which is used to position and install the trolley side plate on a rotating table of welding equipment. The trolley side plate has a through hole. The trolley side plate positioning and clamping device includes a central positioning structure and an auxiliary support structure. The central positioning structure is installed on the rotating table, and the central axis of the central positioning structure coincides with the rotation axis of the rotating table. The upper end of the central positioning structure has a positioning portion and a pressing member. The positioning portion is used to engage with the through hole so that the trolley side plate is positioned at a position where the axis of the through hole coincides with the central axis of the central positioning structure, thereby making the through hole of the trolley side plate coaxial with the rotation axis of the rotating table. The lower end of the auxiliary support structure has a connecting portion for fixedly connecting with the rotating table, and the upper end of the auxiliary support structure has a clamping portion for clamping one side of the trolley side plate. Thus, through the cooperation of the central positioning structure and the auxiliary support structure, the stable positioning of the trolley side plate is realized, which helps to realize the clamping and fixing of the trolley side plate on the welding equipment. Description of the Drawings

[0020] After reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings, the above features and advantages of the present utility model can be better understood. In the drawings, the components are not necessarily drawn to scale, and components with similar relevant characteristics or features may have the same or similar reference numerals.

[0021] Figure 1 Fig. shows a schematic diagram of the overall structure of the trolley side plate positioning and clamping device provided according to one aspect of the present utility model;

[0022] Figure 2 Fig. shows an exploded structure diagram of the trolley side plate positioning and clamping device provided according to one aspect of the present utility model;

[0023] Figure 3 Fig. shows a schematic diagram of the structure of one side of the trolley side plate provided according to one aspect of the present utility model;

[0024] Figure 4 Fig. shows a schematic diagram of the structure of the other side of the trolley side plate provided according to one aspect of the present utility model;

[0025] Figure 5 Fig. shows an exploded structure diagram of the central positioning structure in the trolley side plate positioning and clamping device provided according to one aspect of the present utility model;

[0026] Figure 6 Fig. shows a schematic sectional view of the mating structure between the central positioning structure and the trolley side plate provided according to one aspect of the present utility model;

[0027] Figure 7 Fig. shows a schematic diagram of the structure of the positioning body in the central positioning structure provided according to one aspect of the present utility model;

[0028] Figure 8 Fig. shows a schematic diagram of the structure of the auxiliary support structure in the trolley side plate positioning and clamping device provided according to one aspect of the present utility model.

[0029] Reference numerals:

[0030] 10 - Cart side plate positioning and clamping device; 100 - Central positioning structure; 110 - Positioning main body; 111 - Central column; 112 - Support bottom plate; 113 - Positioning protrusion; 120 - Positioning part; 130 - Pressing part; 131 - Locking screw; 132 - Through hole; 133 - Pressure plate; 134 - Sleeve rod; 200 - Rotary table; 211 - Positioning groove; 212 - First hydraulic jaw; 213 - Second hydraulic jaw; 214 - Threaded hole; 300 - Auxiliary support structure; 310 - Nut seat; 311 - Trapezoidal nut; 312 - Locking screw; 320 - Trapezoidal screw; 321 - Ring groove; 330 - Clamping part; 331 - Main rod; 332 - Mounting hole; 333 - Positioning bolt; 334 - Connecting plate; 335 - First locking bolt; 336 - Second locking bolt; 337 - First clamping plate; 338 - Second clamping plate;

[0031] 20 - Cart side plate; 21 - Through hole; 22 - Welding position;

[0032] 31 - Rotary arm. Detailed implementation mode

[0033] The following describes the present utility model in detail in conjunction with the attached drawings and specific embodiments. It should be noted that the aspects described below in conjunction with the attached drawings and specific embodiments are only exemplary and should not be construed as imposing any limitations on the protection scope of the present utility model.

[0034] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", "vertical", etc. are used to indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the attached drawings, or the orientation or position relationship in which the product of this utility model is habitually placed during use, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0035] At the same time, it should be noted that if terms such as "first" and "second" are only used for differential description and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present utility model, it should also be noted that unless otherwise clearly specified or limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or the internal communication of two elements, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Figure 1Schematic diagram of the overall structure of the trolley side plate positioning and clamping device 10 provided in this embodiment. Figure 2 Schematic diagram of the exploded structure of the trolley side plate positioning and clamping device 10 provided in this embodiment. Please refer to Figure 1 and Figure 2 , this embodiment provides a trolley side plate positioning and clamping device 10, which is used to clamp and fix the trolley side plate 20 on the welding equipment. Specifically, the welding equipment includes a rotating arm 31 and a rotating table 200 rotatably mounted on the rotating arm 31. During welding, the rotating arm 31 and the rotating table 200 drive the trolley side plate 20 fixed thereon to move, so as to weld various parts on the trolley side plate 20, such as Figure 3 and Figure 4 show the welding positions 22 on the trolley side plate 20.

[0038] The trolley side plate positioning and clamping device 10 includes a central positioning structure 100 and an auxiliary support structure 300. The central positioning structure 100 is installed on the rotating table 200, and the central axis of the central positioning structure 100 coincides with the rotation axis of the rotating table 200. The upper end of the central positioning structure 100 has a positioning portion 120 and a pressing member 130. The positioning portion 120 is used to engage with the through hole 21 so that the trolley side plate 20 is positioned at a position where the axis of the through hole 21 coincides with the central axis of the central positioning structure 100, so that the through hole 21 of the trolley side plate 20 is coaxially arranged with the rotation axis of the rotating table 200. The lower end of the auxiliary support structure 300 is provided with a connecting portion, and the connecting portion is used to be fixedly connected with the rotating table 200. The upper end of the auxiliary support structure 300 has a clamping portion 330, and the clamping portion 330 is used to clamp one side of the trolley side plate 20. In this way, through the cooperation of the central positioning structure 100 and the auxiliary support structure 300, the stable positioning of the trolley side plate 20 is realized, which helps to realize the clamping and fixing of the trolley side plate 20 on the welding equipment.

[0039] The following further explains the trolley side plate positioning and clamping device 10 provided in this embodiment:

[0040] Figure 5 shows the exploded structure diagram of the central positioning structure 100 in the trolley side plate positioning and clamping device 10 provided in this embodiment. Please refer to Figures 1-5 , in this embodiment, the central positioning structure 100 includes a positioning main body 110, and the positioning portion 120 is installed at the upper end of the positioning main body 110. The pressing member 130 includes a locking screw 131, a pressing plate 133 and a sleeve rod 134. The locking screw 131 is screwed and fixed on the positioning main body 110, and the locking screw 131 is used to extend from the through hole 21 to above the trolley side plate 20 when the positioning portion 120 cooperates with the through hole 21. The pressing plate 133 is installed at the upper end of the locking screw 131 through the sleeve rod 134 and is used to press the trolley side plate 20 on the positioning main body 110.

[0041] Specifically, the positioning part 120 is an annular protrusion provided at the top of the positioning main body 110, and its outer peripheral dimension is adapted to the inner diameter of the through hole 21 of the trolley side plate 20, so as to realize the central positioning of the trolley side plate 20 through the clamping connection between the positioning part 120 and the through hole 21 (as Figure 6 shown). One end of the locking screw 131 is screwed and fixed to the top of the positioning main body 110 through a circular hole formed in the middle of the positioning part 120. The locking screw 131 is located at the center of the positioning part 120. Therefore, when the positioning part 120 is clamped with the through hole 21, the locking screw 131 can pass through the through hole 21, and the upper end of the locking screw 131 extends through the through hole 21 to the upper side of the through hole 21. The pressing plate 133 is sleeved on the locking screw 131, and a through hole 132 is provided at the upper end of the locking screw 131. The sleeve rod 134 is inserted into the through hole 132, thereby limiting the upward movement of the pressing plate 133 relative to the locking screw 131. During installation, by adjusting the screwing depth of the locking screw 131, the length of the locking screw 131 extending out of the through hole 21 is adjusted, and then a downward pressure is applied to the trolley side plate 20 through the pressing plate 133, so as to press and fix the trolley side plate 20 on the positioning main body 110.

[0042] Optionally, the positioning part 120 is detachably installed on the positioning main body 110. Specifically, the positioning part 120 is detachably installed on the positioning main body 110 through fastening screws, so that the positioning part 120 with a suitable outer diameter can be installed according to the size of the through hole 21 on the trolley side plate 20 to be positioned, so that the central positioning structure 100 can perform central positioning on trolley side plates 20 with different specifications and sizes.

[0043] Figure 7 The structural schematic diagram of the positioning main body 110 in the central positioning structure 100 provided in this embodiment is shown. Please refer to Figures 1-7 In this embodiment, a positioning protrusion 113 is provided at the lower end of the central positioning structure 100. The positioning protrusion 113 is a strip-shaped protrusion intersecting with the central axis of the central positioning structure 100. A positioning groove 211 is provided on the rotating table 200. The positioning groove 211 is a strip-shaped groove intersecting with the rotation axis of the rotating table 200, and the positioning groove 211 cooperates with the strip-shaped groove.

[0044] Specifically, the positioning main body 110 includes a central column 111 and a support bottom plate 112 provided at the lower end of the central column 111. The support bottom plate 112 is square, and the positioning protrusion 113 is a protrusion structure provided at the bottom of the support bottom plate 112, and the positioning protrusion 113 extends from one side of the support bottom plate 112 to the other side.

[0045] Further, a first hydraulic jaw 212 and a second hydraulic jaw 213 are provided on the rotating table 200 and located on both sides of the positioning groove 211. The first hydraulic jaw 212 and the second hydraulic jaw 213 clamp the lower end of the center positioning structure 100, so that the central axis of the center positioning structure 100 coincides with the rotation axis of the rotating table 200. Specifically, the first hydraulic jaw 212 and the second hydraulic jaw 213 are clamped on opposite sides of the support bottom plate 112. When the positioning main body 110 and the rotating table 200 are installed and positioned, first, the positioning protrusion 113 is engaged with the positioning groove 211, so as to realize the coincidence of the lateral reference center of the positioning main body 110 and the rotating table 200; then, through the automatic clamping and centering of the first hydraulic jaw 212 and the second hydraulic jaw 213, the positioning main body 110 is moved to a position coinciding with the rotation axis of the rotating table 200, and the positioning is accurate and the positioning process is simple.

[0046] Figure 8 FIG. is a schematic structural diagram of the auxiliary support structure 300 in the trolley side plate positioning and clamping device 10 provided in this embodiment. Please refer to Figures 1-8 In this embodiment, the connecting portion of the auxiliary support structure 300 is fixedly installed on the rotating table 200 through a locking screw 312. A plurality of threaded holes 214 are provided on the rotating table 200, and the plurality of threaded holes 214 are distributed along the direction close to the center positioning structure 100. During actual installation, the locking screw 312 can be screwed with different threaded holes 214 according to requirements to realize the fixation of the auxiliary support structure 300. In this way, the distances between the fixed auxiliary support structure 300 and the center positioning structure 100 are different, and thus the auxiliary support of the trolley side plate 20 with different specification sizes can be adapted.

[0047] In this embodiment, the auxiliary support structure 300 further includes a nut seat 310 and a trapezoidal screw rod 320. The nut seat 310 forms the above-mentioned connecting portion, and a trapezoidal nut 311 is provided on the nut seat 310. The trapezoidal nut 311 is screwed with the trapezoidal screw rod 320 to form a lead screw mechanism. In this way, during the rotation of the trapezoidal screw rod 320 relative to the trapezoidal nut 311, the trapezoidal screw rod 320 can move up and down. The clamping portion 330 is rotatably installed at the upper end of the trapezoidal screw rod 320. When the trapezoidal screw rod 320 rotates relative to the trapezoidal nut 311, the clamping portion 330 can remain stationary and only move up and down along with the trapezoidal screw rod 320, thereby realizing the rough adjustment of the height of the clamping portion 330.

[0048] Specifically, a hole for the locking screw 312 to pass through is provided on the nut seat 310, and this hole is a strip-shaped hole, so that the distance between the nut seat 310 and the center positioning structure 100 can be finely adjusted.

[0049] Further, the upper end of the trapezoidal screw 320 has an annular groove 321 provided along the circumferential direction of the trapezoidal screw 320. The clamping portion 330 includes a main rod 331 and a positioning bolt 333. A groove is provided at the lower end of the main rod 331, and a plurality of mounting holes 332 communicating with the groove are provided along the circumferential direction of the main rod 331. After the positioning bolt 333 is installed in the mounting hole 332, the end portion of the positioning bolt 333 can extend into the groove. During installation, the upper end of the trapezoidal screw 320 is inserted into the groove, and the positioning bolt 333 is installed in the mounting hole 332. After the end portion of the positioning bolt 333 extends into the groove, it is clamped with the annular groove 321, so that the trapezoidal screw 320 and the main rod 331 are rotatably connected together.

[0050] In this embodiment, the clamping portion 330 further includes a connecting plate 334, a first locking bolt 335 and a second locking bolt 336, and a first clamping plate 337 and a second clamping plate 338 connected to the connecting plate 334. The first clamping plate 337 and the second clamping plate 338 are arranged opposite to each other up and down to form a clamping space for the side plate 20 of the trolley between the first clamping plate 337 and the second clamping plate 338. The first locking bolt 33 is screwed to the first clamping plate 337 and is used to press down the side plate 20 of the trolley; the second locking bolt 336 is screwed to the second clamping plate 338 and is used to fasten the side plate 20 of the trolley. On the one hand, the side plate 20 of the trolley is clamped under the combined action of the first locking bolt 335 and the second locking bolt 336. On the other hand, since the side plate 20 of the trolley is a numerically controlled cutting part and is not completely horizontal, the operator can adjust the position height of the clamped side plate 20 of the trolley between the first clamping plate 337 and the second clamping plate 338 according to the actual horizontal state of the side plate 20 of the trolley through the first locking bolt 335 and the second locking bolt 336.

[0051] The trolley side plate positioning and clamping device 10 provided by the embodiment of the present utility model realizes the precise positioning and installation of the trolley side plate 20 on the welding equipment through the cooperation of the central positioning structure 100 and the auxiliary support structure 300. Before welding operation, first select the threaded holes 214 at appropriate positions according to the outer dimension of the trolley side plate 20, and install the auxiliary support structure 300 on the rotating table 200. Then hoist the central positioning structure 100 directly above the rotating table 200, and use the cooperation of the positioning protrusion 113 and the positioning groove 211 to realize the lateral reference between the central positioning structure 100 and the rotating table 200. And through the relative movement of the oppositely arranged first hydraulic jaw 212 and the second hydraulic jaw 213, the central positioning structure 100 slides relative to the rotating table 200 along the extension direction of the positioning groove 211 until the axis of the central positioning structure 100 coincides with the rotation axis of the rotating table 200, and the outer diameter of the positioning part 120 on the central positioning structure 100 is adapted to the size of the through hole 21 on the trolley side plate 20 to be welded. Then use the lifting equipment to hoist the trolley side plate 20 directly above the central positioning structure 100. After supporting one side of the trolley side plate 20 in the clamping space between the first clamping plate 337 and the second clamping plate 338, then make the through hole 21 of the trolley side plate 20 snap into the positioning part 120 to realize central positioning. Finally, press the trolley side plate 20 through the pressing plate 133, and supplement with the clamping action of the first locking bolt 335 and the second locking bolt 336 to realize the positioning and fixation of the trolley side plate 20.

[0052] The above is only the specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A positioning and clamping device for the side plate of a trolley, characterized in that, The trolley side plate positioning and clamping device is used to position and install the trolley side plate on the rotating table of the welding equipment. The trolley side plate has a through hole. The trolley side plate positioning and clamping device includes: A central positioning structure, which is installed on the rotating table, and the central axis of the central positioning structure coincides with the rotation axis of the rotating table. The upper end of the central positioning structure has a positioning portion and a pressing member. The positioning portion is used to be stuck in the through hole so that the trolley side plate is positioned at a position where the axis of the through hole coincides with the central axis of the central positioning structure; and An auxiliary support structure, the lower end of the auxiliary support structure has a connecting portion, and the connecting portion is used to be fixedly connected with the rotating table. The upper end of the auxiliary support structure has a clamping portion, and the clamping portion is used to clamp one side of the trolley side plate.

2. The trolley side plate positioning and clamping device according to claim 1, wherein A positioning protrusion is provided at the lower end of the central positioning structure. The positioning protrusion is a strip-shaped protrusion intersecting with the central axis of the central positioning structure. A positioning groove is provided on the rotating table. The positioning groove is a strip-shaped groove intersecting with the rotation axis of the rotating table, and the positioning groove cooperates with the strip-shaped groove.

3. The trolley side plate positioning and clamping device according to claim 2, wherein A first hydraulic jaw and a second hydraulic jaw are provided on the rotating table on both sides of the positioning groove. The first hydraulic jaw and the second hydraulic jaw clamp the lower end of the central positioning structure so that the central axis of the central positioning structure coincides with the rotation axis of the rotating table.

4. The trolley side plate positioning and clamping device according to claim 3, wherein The central positioning structure further includes a central column and a support bottom plate provided at the lower end of the central column. The support bottom plate is square. The positioning protrusion is provided on the lower side of the support bottom plate, and the positioning protrusion extends from one side of the support bottom plate to the other side. The first hydraulic jaw and the second hydraulic jaw are used to relatively clamp both sides of the support bottom plate.

5. The trolley side plate positioning and clamping device according to claim 1, wherein The central positioning structure further includes a positioning body, and the positioning portion is provided on the positioning body. The pressing member includes a locking screw, a pressing plate and a sleeve rod. The locking screw is screwed and fixed on the positioning body, and the locking screw is used to extend from the through hole to above the trolley side plate when the positioning portion cooperates with the through hole. The pressing plate is installed on the upper end of the locking screw through the sleeve rod and is used to press the trolley side plate on the positioning body.

6. The trolley side plate positioning and clamping device according to claim 5, wherein The positioning portion is detachably installed on the positioning body.

7. The trolley side plate positioning and clamping device according to claim 1, wherein The connecting part is fixedly installed on the rotating table through a locking screw; a plurality of threaded holes are arranged on the rotating table, and the plurality of threaded holes are distributed in a direction close to the central positioning structure, so that when the locking screw is screwed and fixed with different threaded holes to fix the auxiliary support structure, the distance between the auxiliary support structure and the central positioning structure is different.

8. The trolley side plate positioning and clamping device according to claim 1, wherein The auxiliary support structure further includes a nut seat and a trapezoidal screw rod. The nut seat forms the connecting part, and a trapezoidal nut is arranged on the nut seat. The trapezoidal screw rod is screwed with the trapezoidal nut; the clamping part is rotatably installed at the upper end of the trapezoidal screw rod, so that when the trapezoidal screw rod rotates relative to the trapezoidal nut, the clamping part is driven to move up and down.

9. The trolley side plate positioning and clamping device according to claim 8, wherein The upper end of the trapezoidal screw rod is provided with an annular groove arranged along the circumferential direction of the trapezoidal screw rod; the clamping part includes a main rod and a positioning bolt. A groove is arranged at the lower end of the main rod, and a plurality of mounting holes communicating with the groove are arranged on the main rod along the circumferential direction of the main rod. The upper end of the trapezoidal screw rod is inserted into the groove, the positioning bolt is installed in the mounting hole, and one end of the positioning bolt extends into the groove and is clamped with the annular groove, so that the clamping part is rotatably connected with the trapezoidal screw rod.

10. The trolley side plate positioning and clamping device according to claim 1, wherein The clamping part includes a connecting plate, a first locking bolt and a second locking bolt, and a first clamping plate and a second clamping plate connected to the connecting plate. The first clamping plate and the second clamping plate are arranged opposite to each other up and down, so as to form a clamping space for clamping the trolley side plate between the first clamping plate and the second clamping plate; the first locking bolt is screwed to the first clamping plate and is used to press down the trolley side plate; the second locking bolt is screwed to the second clamping plate and is used to jack up the trolley side plate, so as to clamp the trolley side plate between the first locking bolt and the second locking bolt.

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