A framework side beam assembly tool

Abstract

This utility model discloses a frame side beam assembly fixture, relating to the field of assembly fixture technology. It includes an assembly workbench, a positioning mechanism, and an adjustment mechanism. The positioning mechanism is disposed on the assembly workbench and can fix the relative positions of the side beam upright plate and the side beam lower cover plate on the assembly workbench. The adjustment mechanism includes at least one adjustment device, which is used to adjust the side beam upright plate and the side beam lower cover plate at the positions on the assembly workbench where adjustment is needed. The adjustment device includes a bottom support and a connector. The bottom support has a bearing surface that contacts the side of the side beam lower cover plate away from the side beam upright plate. The connector includes a puller and a pull plate. The pull plate is disposed on the side of the side beam upright plate away from the side beam lower cover plate. The puller is disposed on the assembly workbench and can pull the pull plate towards the bearing surface. This reduces adjustment and material transportation time, improving assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of assembly tooling technology, and in particular to a structural side beam assembly tooling. Background Technology

[0002] In the manufacturing process of side beams for rail transit structures, production progress is frequently affected by substandard materials. This is especially true when assembling the lower cover plate and the upright plate; a mismatch between the bending arc of the lower cover plate and the radius of the upright plate often leads to gaps, further impacting welding quality. Under current production conditions, the only solution is to re-bend the lower cover plate, adjust the bending arc position and angle, and then reassemble.

[0003] This results in the need to repeatedly hoist materials to the tooling to match the arc of the side beam undercover plate with the side beam upright plate, which wastes time and is inefficient. Utility Model Content

[0004] The purpose of this utility model is to provide a frame side beam assembly tooling to solve the problems existing in the prior art, reduce adjustment and material transportation time, and improve assembly efficiency.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a frame side beam assembly fixture, including an assembly workbench, a positioning mechanism, and an adjustment mechanism. The positioning mechanism is disposed on the assembly workbench and can fix the relative positions of the side beam upright plate and the side beam lower cover plate on the assembly workbench respectively. The adjustment mechanism includes at least one adjustment device, which is used to be positioned on the assembly workbench at the position where the side beam upright plate and the side beam lower cover plate need adjustment. The adjustment device includes a bottom support and a connector. The bottom support has a bearing surface, which contacts the side of the side beam lower cover plate away from the side beam upright plate. The connector includes a puller and a pull plate. The pull plate is used to be disposed on the side of the side beam upright plate away from the side beam lower cover plate. The puller is disposed on the assembly workbench and can pull the pull plate towards the bearing surface.

[0007] Preferably, the assembly workbench further includes a dimension detection mechanism; the dimension detection mechanism includes a center aligner and two end detectors; the center aligner is fixedly mounted on the assembly workbench and is used to align with the centerline of the side beam lower cover plate; each of the end detectors is fixedly mounted on the assembly workbench and is used to correspond to the end of the side beam lower cover plate; the end detector has an end limiting groove, the end limiting groove is used to hold part of the end structure of the side beam lower cover plate, and a detection gap is formed between the end of the side beam lower cover plate and the corresponding sidewall of the end limiting groove.

[0008] Preferably, the puller includes two pull units, each of which is located on both sides of the side beam upright plate and the side beam lower cover plate; the pull unit includes a base and a pull member, the base is fixedly mounted on the assembly workbench, the pull member can be mounted on the base, and the pull member can pull the pull plate to move closer to the bearing surface.

[0009] Preferably, the pulling unit further includes a universal joint, which is disposed on the base and the pulling member is disposed on the universal joint. The universal joint can drive the pulling member to rotate around a first axis and a second axis. The first axis is parallel to the table surface of the assembly workbench and perpendicular to the length direction of the side beam upright plate fixed on the assembly workbench. The second axis is perpendicular to the first axis.

[0010] Preferably, the pulling component includes a pulling screw and a pulling nut; the universal joint includes a universal bracket, which is rotatably mounted on the base about the first axis, and one end of the pulling screw is rotatably mounted on the end of the universal bracket away from the base about the second axis; the pulling plate has two pulling holes, and the end of the pulling screw away from the universal bracket passes through one of the pulling holes; the pulling nut is threadedly connected to the threaded section of the pulling screw that passes through the pulling hole.

[0011] Preferably, the positioning mechanism includes a central locator and two end locators; the central locator is used to fix the relative position of the middle part of the side beam upright plate and the side beam lower cover plate on the assembly worktable; each of the end locators is used to fix the relative position of the ends of the side beam upright plate and the side beam lower cover plate on the assembly worktable.

[0012] Preferably, the positioning mechanism further includes at least one pressing mechanism; the pressing mechanism has a pressing end, which is used to press against the side of the side beam upright plate away from the side beam lower cover plate.

[0013] Preferably, the center alignment device includes a positioning strip and a positioning cylinder; the positioning strip is fixedly disposed on the assembly worktable; the positioning strip has an alignment vertical plane; the positioning cylinder is fixedly disposed on the assembly worktable and is used to correspond to the circular hole on the lower cover plate of the side beam.

[0014] Preferably, the pulling member further includes a docking plate, which is used to be disposed on the side of the side beam lower cover plate away from the side beam upright plate; the bottom bearing is provided with a receiving groove, and the docking plate can be located in the receiving groove; the docking plate is provided with two through holes, each of the through holes corresponding to the pulling screw.

[0015] Preferably, one of the pull holes on the pull plate is a through hole, and the other pull hole on the pull plate is a U-shaped groove.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] The frame side beam assembly fixture provided by this utility model uses a positioning mechanism to fix the positions of the side beam upright plate and the lower cover plate on the assembly workbench, ensuring that both have a stable reference before adjustment. The puller drives the pull plate to move the upright plate towards the bearing surface, forcing the rounded corners of the upright plate to press and fit with the arc of the lower cover plate, gradually eliminating gaps. This allows the adjustment work to be completed on the assembly workbench without moving the workpiece. The arc matching can be completed through on-site dynamic adjustment, reducing adjustment and material transportation time and improving assembly efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of the frame side beam assembly tooling provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of the frame side beam assembly tooling provided by this utility model, which includes a side beam upright plate and a side beam lower cover plate;

[0021] Figure 3 A schematic diagram of the overall structure of the side beam upright plate and the side beam lower cover plate used in the frame side beam assembly tooling provided by this utility model;

[0022] Figure 4A schematic diagram of the central positioning component in the frame side beam assembly tooling provided by this utility model;

[0023] Figure 5 A schematic diagram of the pressing mechanism in the frame side beam assembly tooling provided by this utility model;

[0024] Figure 6 A schematic diagram of the adjustment device in the frame side beam assembly tooling provided by this utility model;

[0025] Figure 7 A schematic diagram of the end positioner in the frame side beam assembly tooling provided by this utility model;

[0026] Figure 8 A structural schematic diagram of the end positioner in the frame side beam assembly tooling provided by this utility model from another perspective;

[0027] Figure 9 A schematic diagram of the end detector in the frame side beam assembly tooling provided by this utility model.

[0028] In the picture:

[0029] 10 - Assembly workbench;

[0030] 20-Adjustment device; 21-Bottom support; 22-Pull plate; 23-Universal bracket; 24-Pull screw; 25-Pull nut; 26-Matching plate;

[0031] 30 - Positioning strip; 31 - Positioning cylinder;

[0032] 40 - End detector; 41 - End limiting groove;

[0033] 50 - Central positioning component; 51 - Central clamping device; 52 - Central docking block;

[0034] 60-End positioner; 61-Support base; 62-End positioning plate; 621-Limiting protrusion; 63-End side beam upright plate screw tensioner; 64-End top surface screw tensioner; 65-End side screw tensioner; 66-End side beam lower cover plate tensioner;

[0035] 70 - Pressing mechanism; 71 - Support column; 72 - Cantilever; 73 - Pressing plate assembly. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] The purpose of this utility model is to provide a frame side beam assembly tooling to solve the problems existing in the prior art, reduce adjustment and material transportation time, and improve assembly efficiency.

[0038] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] This embodiment provides a frame side beam assembly fixture, such as... Figures 1-9 As shown, the assembly includes an assembly workbench 10, a positioning mechanism, and an adjustment mechanism. The positioning mechanism is disposed on the assembly workbench 10 and can fix the relative positions of the side beam upright plate and the side beam lower cover plate on the assembly workbench 10 respectively. The adjustment mechanism includes at least one adjustment device 20, which is used to be positioned on the assembly workbench 10 at the position where the side beam upright plate and the side beam lower cover plate need adjustment. The adjustment device 20 includes a bottom support 21 and a connector. The bottom support 21 has a bearing surface, which contacts the side of the side beam lower cover plate away from the side beam upright plate. The connector includes a puller and a pull plate 22. The pull plate 22 is used to be positioned on the side of the side beam upright plate away from the side beam lower cover plate. The puller is disposed on the assembly workbench 10 and can pull the pull plate 22 towards the bearing surface.

[0041] The positioning mechanism fixes the positions of the side beam upright plate and the lower cover plate on the assembly workbench 10, ensuring that they have a stable reference before adjustment. The puller drives the pull plate 22, which moves the upright plate towards the bearing surface, forcing the rounded corners of the upright plate to press and fit with the arc of the lower cover plate, gradually eliminating gaps. This allows the adjustment work to be completed on the assembly workbench 10 without moving the workpiece. The arc matching can be completed through on-site dynamic adjustment, reducing adjustment and material transportation time and improving assembly efficiency.

[0042] Specifically, the positioning mechanism accurately positions each material on the side beam, namely the position of the side beam upright plate and the side beam lower cover plate, which facilitates assembly and is efficient and quick.

[0043] In this embodiment, the frame side beam assembly fixture is equipped with a positioning mechanism, an adjustment mechanism, and a dimensional detection mechanism on the assembly workbench 10, as detailed below:

[0044] The following are the settings instructions for the assembly workbench 10:

[0045] Specifically, the lower end of the assembly workbench 10 is also fixedly equipped with multiple support legs.

[0046] The following are the relevant instructions regarding the positioning mechanism:

[0047] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, the positioning mechanism includes a central locator and two end locators 60; the central locator is used to fix the relative position of the middle part of the side beam upright plate and the side beam lower cover plate on the assembly workbench 10; each end locator 60 is used to fix the relative position of the ends of the side beam upright plate and the side beam lower cover plate on the assembly workbench 10.

[0048] Specifically, the central locator includes at least one central locating component 50, which includes a central clamping device 51 and a central docking block 52. The central clamping device 51 and the central docking block 52 are located on the left and right sides of the entire workpiece of the side beam upright plate and the side beam lower cover plate, respectively. The central clamping device 51 includes a central clamping screw, a central clamping base, and a central clamping plate. The central clamping base is fixedly connected to the assembly workbench 10. The central clamping base is provided with a threaded hole, and the central clamping screw is threaded into the threaded hole. The central clamping screw is rotatably provided with a central clamping plate at one end near the central docking block 52, and a handle is provided at the other end of the central clamping screw. The central clamping plate and the central docking block 52 work together to jointly clamp the sides of the side beam upright plate and the side beam lower cover plate.

[0049] Specifically, the end positioner 60 includes a support base, an end positioning plate 62, an end side beam upright plate screw tensioner 63, an end top surface screw tensioner 64, an end side surface screw tensioner 65, and an end side beam lower cover plate tensioner 66. The support base is fixedly mounted on the assembly workbench 10, and all other components are mounted on the support base. The end positioning plate 62 is located below the end of the side beam lower cover plate in the vertical height direction, and is used to limit its height. The end side beam upright plate screw tensioner 63 tightens and limits the end of the side beam upright plate in the length direction. The top surface screw tensioner 64 is used to tighten and limit the side beam upright plate vertically downwards; the end side screw tensioner 65 consists of three screw tensioners, two on one side and one on the other side; the two opposing screw tensioners are used to apply tightening force to the left and right sides of the side beam upright plate; the remaining screw tensioner, together with the limiting protrusion 621 on the end positioning plate 62, applies tightening force to both sides of the side beam lower cover plate; the end side beam lower cover plate tensioner 66 is used to tighten and limit the end of the side beam lower cover plate in the length direction.

[0050] Specifically, the screw tensioner consists of a handle, a screw, a tensioning block, and a corresponding threaded hole. The corresponding threaded hole is located in a corresponding position. The handle is located at one end of the screw. The screw is threaded into the corresponding threaded hole, and the other end of the screw is rotatably equipped with a tensioning block for tensioning (this is an existing structure and will not be described in detail; other similar structures are the same).

[0051] Specifically, the operating space of the end side beam under cover plate clamping device 66 can be composed of an end support, an end screw, an end clamping block, and a rotating block; the end support is fixed on the support seat 61, and the end support is provided with an end internal thread hole, the end screw is threaded into the end internal thread hole, the end clamping block is rotatably connected to the end of the end screw, and the end of the end screw near the end clamping block is fixed with a rotating block, and the rotating block is provided with two cross-shaped through holes.

[0052] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 and Figure 5 As shown, the positioning mechanism further includes at least one pressing mechanism 70; the pressing mechanism 70 has a pressing end for pressing against the side of the side beam upright plate away from the side beam lower cover plate. The pressing mechanism 70 is used to provide sufficient clamping force to the top of the side beam upright plate to prevent relative displacement between the side beam upright plate and the side beam lower cover plate.

[0053] Specifically, the pressing mechanism 70 includes a support column 71, a cantilever 72, and a pressing plate assembly 73. The lower end of the support column 71 is fixedly mounted on the assembly workbench 10. One end of the cantilever 72 is rotatably connected to the upper end of the support column 71 about a vertical axis (this can be achieved through a bearing or through a clearance fit, such as a rotating column fixed to the upper end of the support column 71, and a collar provided at one end of the cantilever 72, which is fitted onto the rotating column through a clearance fit). The other end of the cantilever 72 is connected to the pressing plate assembly. Component 73, the lower pressure plate assembly 73 has a lower pressure end; the lower pressure plate assembly 73 may include a lower pressure base plate and a lower pressure screw, the end of the cantilever 72 away from the support column 71 is provided with a threaded hole, the lower pressure screw is threaded in the threaded hole, the lower end of the lower pressure screw is rotatably connected to the lower pressure base plate (the upper end of the lower pressure screw may be provided with a handle), by rotating the lower pressure screw in the threaded hole, the lower pressure base plate is driven to rise and fall in the vertical direction, and the rotation of the lower pressure screw does not drive the lower pressure base plate to rotate accordingly.

[0054] The following are the relevant instructions regarding the setup of the repair and maintenance organization:

[0055] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 and Figure 6 As shown, the puller includes two pull units, each located on both sides of the side beam upright plate and the side beam lower cover plate; the pull unit includes a base and a pull member, the base is fixedly mounted on the assembly workbench 10, the pull member can be mounted on the base, and the pull member can pull the pull plate 22 to move towards the bearing surface.

[0056] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 and Figure 6 As shown, the pulling unit also includes a universal joint, which is mounted on the base and the pulling member is mounted on the universal joint. The universal joint can drive the pulling member to rotate around the first axis and the second axis. The first axis is parallel to the table surface of the assembly workbench 10 and perpendicular to the length direction of the side beam upright plate fixed on the assembly workbench 10. The second axis is perpendicular to the first axis.

[0057] Specifically, in addition to the structures mentioned above, the gimbal can also be other existing structures that can support rotation around the first axis and the second axis, which will not be elaborated on here.

[0058] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 and 6As shown, the pulling component includes a pulling screw 24 and a pulling nut 25; the universal joint includes a universal bracket 23, which is rotatably mounted on the base about a first axis (the two are rotatably connected by a pin), and one end of the pulling screw 24 is rotatably mounted on the end of the universal bracket 23 away from the base about a second axis (the two are rotatably connected by a pin); the pulling plate 22 has two pulling holes, and the end of the pulling screw 24 away from the universal bracket 23 passes through one of the pulling holes; the pulling nut 25 is threadedly connected to the threaded section of the pulling screw 24 that passes through the pulling hole.

[0059] Specifically, based on the universal joint supporting the rotation of the pull rod 24 relative to the base around the first axis, it can be made to fit more closely to the joint between the side beam upright plate and the side beam lower cover plate, making it more closely fitted and easier to apply force; the universal joint supporting the rotation of the pull rod 24 relative to the universal bracket 23 around the second axis, so that during disassembly and assembly, it is only necessary to move the pull rods 24 on both sides toward the assembly workpiece closer to the center or to place them on both sides after disassembly, which has little impact on the disassembly and assembly of the workpiece and is more convenient.

[0060] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 and Figure 6 As shown, the pulling component also includes a docking plate 26, which is used to be set on the side of the side beam lower cover plate away from the side beam upright plate; the bottom bearing 21 is provided with a receiving groove, and the docking plate 26 can be located in the receiving groove; the docking plate 26 is provided with two through holes, each through hole corresponding to the pulling screw 24.

[0061] Specifically, when a gap appears between the side beam upright plate and the side beam lower cover plate, tightening the pull nut 25 causes the pull plate 22 to move towards the side closer to the mating plate 26, thereby reducing the gap. Ultimately, the side beam upright plate and the side beam lower cover plate can meet the assembly requirements without rework.

[0062] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 6 As shown, one of the pull holes on the pull plate 22 is a through hole, and the other pull hole on the pull plate 22 is a U-shaped groove.

[0063] Specifically, the pull plate 22 and the docking plate 26 have the same structure and adopt a U-shaped groove structure, which makes it easier and faster to assemble and disassemble the pull plate 22 and the docking plate 26 with the two pull screws 24.

[0064] The following are the relevant setup instructions for the dimensional inspection mechanism:

[0065] Specifically, the side beam under cover plate is prone to bending, twisting, and changes in length after bending. Therefore, the setting of a dimensional inspection mechanism can enable intuitive inspection of whether the material of the side beam under cover plate is qualified.

[0066] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 and Figure 9 As shown, the assembly workbench 10 also includes a dimension detection mechanism; the dimension detection mechanism includes a center aligner and two end detectors 40; the center aligner is fixedly mounted on the assembly workbench 10 and is used to align with the centerline of the side beam lower cover plate; each end detector 40 is fixedly mounted on the assembly workbench 10 and is used to correspond to the end of the side beam lower cover plate; the end detector 40 has an end limiting groove 41 (which is an L-shaped corner plate with an L-shaped limiting surface, the L-shaped limiting surface is used to correspond to the position of one corner of the end of the side beam lower cover plate, the L-shaped limiting surface forms its end limiting groove 41; in addition to the L-shaped limiting surface, the end limiting groove 41 may also be provided with a bottom receiving surface), the end limiting groove 41 is used to hold part of the end structure of the side beam lower cover plate, and a detection gap is formed between the end of the side beam lower cover plate and the corresponding side wall of the end limiting groove 41.

[0067] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1-3 As shown, the center alignment device includes a positioning strip 30 and a positioning cylinder 31. The positioning strip 30 is fixedly mounted on the assembly workbench 10. The positioning strip 30 has an alignment vertical plane. The positioning cylinder 31 is fixedly mounted on the assembly workbench 10 and is used to correspond to the circular hole on the lower cover plate of the side beam. By attaching one right-angled edge of an L-shaped ruler to the workbench surface of the assembly workbench 10 and the other right-angled edge to the alignment vertical plane of the positioning strip 30, and at this time, the L-shaped ruler is in close contact with the side wall of the lower cover plate of the side beam, and by aligning the side of the L-shaped ruler corresponding to the vertical plane with the center line drawn on the upper surface of the lower cover plate of the side beam, the lower cover plate of the side beam can be centered and aligned. The diameter of the positioning cylinder 31 is designed to be 1mm smaller than the inner diameter of the circular hole on the lower cover plate of the side beam, which ensures that the lower cover plate of the side beam can be easily removed after assembly and also ensures its positioning accuracy.

[0068] Regarding other related settings:

[0069] Specifically, the number and position of each component in this embodiment are set according to actual needs. For example, the pressing mechanism 70 can be set to two, which are symmetrical from left to right.

[0070] Specifically, regarding the lead screw-related structure in this embodiment, in addition to the lead screw structure, it can also be the telescopic rod structure of existing telescopic devices that are driven by hydraulic, pneumatic or electric power.

[0071] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A frame side beam assembly fixture, characterized in that: Includes assembly workbench, positioning mechanism and adjustment mechanism; The positioning mechanism is disposed on the assembly workbench, and the positioning mechanism is capable of fixing the relative positions of the side beam upright plate and the side beam lower cover plate on the assembly workbench respectively. The adjustment mechanism includes at least one adjustment device, which is used to be positioned on the assembly workbench at the location where the side beam upright plate and the side beam lower cover plate need adjustment; the adjustment device includes a bottom support and a connector; the bottom support has a bearing surface, which contacts the side of the side beam lower cover plate away from the side beam upright plate; the connector includes a puller and a pull plate, the pull plate is used to be positioned on the side of the side beam upright plate away from the side beam lower cover plate, the puller is positioned on the assembly workbench, and the puller is capable of pulling the pull plate towards the bearing surface.

2. The frame side beam assembly fixture according to claim 1, characterized in that: The assembly workbench also includes a size detection mechanism; The dimensional detection mechanism includes a center aligner and two end detectors; the center aligner is fixedly mounted on the assembly workbench and is used to align with the centerline of the side beam lower cover plate; Each of the end detectors is fixedly mounted on the assembly workbench, and each end detector is used to correspond to the end of the side beam lower cover plate; the end detector has an end limiting groove, which is used to hold part of the end structure of the side beam lower cover plate, and a detection gap is formed between the end of the side beam lower cover plate and the corresponding side wall of the end limiting groove.

3. The frame side beam assembly fixture according to claim 1, characterized in that: The puller includes two pull units, each of which is located on both sides of the side beam upright plate and the side beam lower cover plate; The pulling unit includes a base and a pulling member. The base is fixedly mounted on the assembly workbench, and the pulling member can be mounted on the base. The pulling member can pull the pulling plate to move closer to the bearing surface.

4. The frame side beam assembly fixture according to claim 3, characterized in that: The pulling unit also includes a universal joint, which is disposed on the base and the pulling member is disposed on the universal joint. The universal joint can drive the pulling member to rotate around a first axis and a second axis. The first axis is parallel to the table surface of the assembly workbench and perpendicular to the length direction of the side beam upright plate fixed on the assembly workbench. The second axis is perpendicular to the first axis.

5. The frame side beam assembly fixture according to claim 4, characterized in that: The pulling component includes a pulling screw and a pulling nut; The universal joint includes a universal bracket, which is rotatably mounted on the base about the first axis, and one end of the pull screw is rotatably mounted on the end of the universal bracket away from the base about the second axis; The pull plate has two pull holes, and the end of the pull rod away from the universal bracket passes through one of the pull holes; the pull nut is threadedly connected to the threaded section of the pull rod that passes through the pull hole.

6. The frame side beam assembly fixture according to claim 1, characterized in that: The positioning mechanism includes a central positioner and two end positioners; The center positioner is used to fix the relative position of the center of the side beam upright plate and the side beam lower cover plate on the assembly workbench; Each of the end positioners is used to fix the relative position of the ends of the side beam upright plate and the side beam lower cover plate on the assembly workbench.

7. The frame side beam assembly fixture according to claim 6, characterized in that: The positioning mechanism further includes at least one pressing mechanism; The pressing mechanism has a pressing end, which is used to press against the side of the side beam upright plate away from the side beam lower cover plate.

8. The frame side beam assembly fixture according to claim 2, characterized in that: The central alignment device includes a positioning bar and a positioning cylinder; The positioning strip is fixedly mounted on the assembly workbench; the positioning strip has an alignment vertical plane. The positioning cylinder is used to be fixedly mounted on the assembly workbench, and the positioning cylinder is used to correspond to the circular hole on the lower cover plate of the side beam.

9. The frame side beam assembly fixture according to claim 5, characterized in that: The pulling component also includes a docking plate, which is used to be disposed on the side of the side beam under cover plate away from the side beam upright plate; The bottom support is provided with a receiving groove, and the docking plate can be located in the receiving groove; The docking plate is provided with two through holes, each of which is respectively threaded onto the pull screw.

10. The frame side beam assembly fixture according to claim 5, characterized in that: One of the pull holes on the pull plate is a through hole, and the other pull hole on the pull plate is a U-shaped groove.

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