Assembling device for spot welding of rear triangle of electric bicycle

Abstract

The utility model relates to the technical field of spot welding of electric bicycles, in particular to an assembling device for spot welding of a rear triangle of an electric bicycle. The utility model discloses an assembling device for spot welding of a rear triangle of an electric bicycle, which comprises a bearing table provided with a positioning block used for fixing a middle shaft, a metal plate support used for fixing a bottom plate, two first quick clamps used for abutting against the rear triangle and the bottom plate respectively, and a second quick clamp used for fixing a side plate. The bearing platform is provided with a fixing hole, the bearing platform is further provided with a five-way fixing column used for being matched with a five-way pipe on a center shaft, the five-way fixing column is located on the side close to the positioning block, the fixing hole is matched with a fixing pin shaft, and the fixing pin shaft is used for positioning battery mounting holes in the side plate and the bottom plate. The welding fixture has the advantages that the battery mounting hole can be prevented from deviating during welding, and the battery can be smoothly assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of spot welding of electric bicycles, in particular to an assembly device for spot welding of the rear triangle of an electric bicycle. Background Art

[0002] Chinese patent application number 202222307580.1 discloses a welding auxiliary positioning device for the rear triangle of a bicycle, including a fixed plate, on which a first quick clamp and a U-shaped positioning block for clamping and positioning pipe fittings are provided, the fixed plate is provided with a notch or a clearance groove, and the fixed plate is provided with a claw positioning assembly adjacent to the notch or the clearance groove, the claw positioning assembly includes two second quick clamps, a translation block slidingly arranged along the end surface of the fixed plate, and a first support block fixed to the fixed plate and used to support a claw, a lifting drive is fixed on the translation block, and the output end of the lifting drive is provided with a second support block for supporting the other claw.

[0003] In the above technical solution, the rear triangle of the bicycle is supported by a horizontally placed fixing plate, and the clamping device is realized by the first quick clamp and the second quick clamp. However, since there is no need to assemble a battery on the rear triangle of the bicycle, there is no need to design and fix the end positions of the workpieces used for welding to form the rear triangle of the bicycle during the clamping process of the rear triangle of the bicycle. It is only necessary to fix the workpieces as a whole. As a result, when the above technical solution is adapted to the welding process of the rear triangle of the electric bicycle, the relative positions of the battery mounting holes on the two side panels and the bottom panel and the central axis will be affected by the stress of the welding layer, thereby affecting the position accuracy of the battery mounting holes, resulting in the subsequent battery assembly being affected. Utility Model Content

[0004] The utility model aims to provide an assembly device for spot welding the rear triangle of an electric bicycle, which can simultaneously fix the battery mounting holes on the side panels and the bottom panel and the central axis to ensure the position accuracy of the battery mounting holes.

[0005] To achieve the above-mentioned purpose, the utility model discloses an assembly device for spot welding the rear triangle of an electric bicycle, including a bearing platform, on which is provided a positioning block for fixing the middle axis, a sheet metal bracket for fixing the bottom plate, two first quick clamps for respectively pressing against the rear triangle and the bottom plate, and a second quick clamp for fixing the side plate. A fixing hole is provided on the bearing platform, and a five-way fixing column is also provided on the bearing platform for cooperating with the five-way tube on the middle axis. The five-way fixing column is located on the side close to the positioning block, and the fixing hole is equipped with a fixing pin shaft, which is used to position the battery mounting holes on the side plate and the bottom plate.

[0006] When spot welding is required on the rear triangle of an electric bicycle, the five-way fixing column cooperates with the positioning block to fix the position of the center axis and is tightened by the first quick clamp. The sheet metal bracket fixes the bottom plate and is tightened by the first quick clamp. The fixing pin cooperates with the second quick clamp to position the side plate, the battery mounting hole on the side plate and the battery mounting hole on the bottom plate, thereby completing the fixation of the workpiece before spot welding.

[0007] The utility model can accurately fix the positions of the side panels, the battery mounting holes on the side panels and the battery mounting holes on the bottom panel through the cooperation of the fixing pin shaft and the five-way fixing column, and utilizes the cooperation of the five-way fixing column, the positioning block and the first quick clamp to ensure the relative position accuracy between the battery mounting hole and the central axis and the stability of the central axis during the welding process, avoid the influence of the welding layer stress on the position of the battery mounting hole, reduce the position deviation caused by welding stress, and thus ensure the smooth assembly of the battery in the subsequent process. The utility model has the advantage of preventing the battery mounting hole from deflecting during welding, ensuring that the battery can be assembled smoothly.

[0008] The first quick clamp can be detachably connected to the supporting platform through the fixing hole by means of screws or bolts and nuts, so as to be suitable for spot welding of the rear triangle of electric bicycles of different specifications. Among them, the first quick clamp can select any existing mechanical mechanism that uses a single reciprocating motion trajectory to tighten the workpiece, such as a quick hand clamp, a push rod, etc.

[0009] Preferably, the fixing pin includes a small diameter section and a large diameter section, the small diameter section is used to cooperate with the fixing hole, the large diameter section is located in the axial direction of the small diameter section, and the large diameter section is used to cooperate with the battery mounting hole.

[0010] The small diameter section of the fixed pin is used to cooperate with the fixing hole to realize the mortise and tenon connection. Compared with the method of threading the small diameter section of the fixed pin with the bearing platform, the fixed pin can be quickly disassembled and assembled, which facilitates the installation and disassembly of the rear triangle of the electric bicycle and improves the assembly efficiency.

[0011] Preferably, a cavity matching the side plate is provided on the supporting platform, and the second quick clamp is located on a side close to the cavity.

[0012] By setting up a cavity, one side of the side panel is pre-assembled on the supporting platform. Compared with the method of directly fixing the side panel on the supporting platform, it can better determine the fixed position of the side panel and limit the side panel, and ensure that the side panel will not shift along the circumferential direction.

[0013] Preferably, the second quick clamp comprises a support block and a clamping piece, wherein the clamping piece is fixedly mounted on the support block, and two through holes with large diameter sections for matching fixing pins are symmetrically arranged in the support block with the clamping piece as the center.

[0014] The two side plates are fixed on the supporting platform by pre-assembling the side plate on one side on the supporting platform, and then stacking the support block and the side plate on the other side in sequence, and the two side plates are further fixed by clamping parts; the fixing pin shaft passes through the through hole in the support block, and the support block is fixed by using the outer cylindrical surface of the large diameter section.

[0015] Preferably, a recess is provided in the positioning block and matches the outer surface of the central axis.

[0016] The central shaft can be supported and prevented from shifting by the recess in the positioning block, wherein the recess can be a through cavity that completely passes through the positioning block along the axis of the central shaft, or it can be a stepped cavity that fits with the heads located at both ends of the central shaft.

[0017] Preferably, a slide groove is provided on the supporting platform for the horizontal movement of the positioning block, and the positioning block is slidably matched with the supporting platform, thereby facilitating the adjustment of the position of the positioning block and facilitating the installation of rear triangles of electric bicycles of different specifications.

[0018] The utility model can ensure the relative position accuracy between the battery mounting hole and the central axis and the stability of the central axis during the welding process, avoids the influence of the welding layer stress on the position of the battery mounting hole, prevents the battery mounting hole from shifting during welding, and ensures that the battery can be assembled smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the present utility model.

[0020] Figure 2 This is a schematic structural diagram of the rear triangle of the electric bicycle of the present invention before installation.

[0021] Figure 3 This is a structural diagram of the fixed pin shaft of the utility model.

[0022] In the figure: 11, supporting platform; 111, fixing hole; 112, cavity; 12, positioning block; 121, groove; 122, slide; 13, bottom bracket fixing column; 14, sheet metal bracket; 15, support block; 16, clamping piece; 17, fixing pin; 171, large diameter section; 172, small diameter section; 18, first quick clamp; 20, middle bracket; 201, bottom bracket; 21, bottom plate; 22, side plate; 23, battery mounting hole. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Depend on Figure 1 、 Figure 2As shown, this embodiment discloses an assembly device for spot welding the rear triangle of an electric bicycle, including a carrying platform 11, a positioning block 12 for fixing the middle axis 20, a sheet metal bracket 14 for fixing the bottom plate 21, two first quick clamps 18 for respectively pressing against the rear triangle and the bottom plate 21, and a second quick clamp for fixing the side plate 22, a slide groove 122 for horizontal movement of the positioning block 12 is provided on the carrying platform 11, the positioning block 12 is slidably matched with the carrying platform 11, a groove 121 is provided in the positioning block 12 that fits the outer surface of the middle axis 20, and a plurality of fixed The fixed hole 111, each area is used for position adjustment when the first quick clamp 18, the sheet metal bracket 14 and the carrier platform 11 are assembled, and the fixing pin 17 is assembled with the carrier platform 11. A cavity 112 that fits the side panel 22 is provided on the carrier platform 11. The second quick clamp is located on the side close to the cavity 112. The carrier platform 11 is also provided with a five-way fixing column 13 for cooperating with the five-way tube 201 on the center axis 20. The five-way fixing column 13 is located on the side close to the positioning block 12. The fixing hole 111 is equipped with a fixing pin 17, which is used to position the battery mounting hole 23 on the side panel 22 and the bottom plate 21.

[0025] Depend on Figure 3 As shown, the fixing pin shaft 17 includes a small diameter section 172 and a large diameter section 171 . The small diameter section 172 is used to cooperate with the fixing hole 111 , and the large diameter section 171 is located in the axial direction of the small diameter section 172 . The large diameter section 171 is used to cooperate with the battery installation hole 23 .

[0026] The second quick clamp includes a support block 15 and a clamping member 16. The clamping member 16 is fixed on the support block 15. Two through holes with large diameter sections 171 of the fixing pins 17 are symmetrically arranged in the support block 15 with the clamping member 16 as the center. The first side plate 22 is placed in the cavity 112, and the support block 15 and the second side plate 22 are stacked on the first side plate 22 in sequence. The side plates 22 are fixed to the supporting platform 11 by the fixing pins 17 along the battery mounting holes 23 on the first side plate 22 and the second side plate 22.

[0027] When it is necessary to spot weld the rear triangle of the electric bicycle, the first side plate 22 is placed in the cavity 112, and then the rear triangle of the electric bicycle is placed on the carrier 11, and the groove 121 in the positioning block 12 is used to support the middle axis 20 of the rear triangle of the electric bicycle. At this time, the five-way fixing column 13 passes through the five-way tube 201 on the middle axis 20, thereby completing the fixation of the middle axis 20, and the rear triangle of the electric bicycle is tightened by one of the first quick clamps 18, thereby completing the position of the rear triangle of the electric bicycle. At this time, the support block 15 and the second side plate 22 are stacked on the first side plate 22 in sequence, and the fixing The fixed pin shaft 17 fixes the side panel 22 on the supporting platform 11 along the battery mounting holes 23 on the first side panel 22 and the second side panel 22. At the same time, the bottom panel 21 is fixed to the supporting platform 11 through the sheet metal bracket 14, and is tightened by another first quick clamp 18 to complete the fixation of the bottom panel 21. The fixed pin shaft 17 then completely fixes the bottom panel 21 on the supporting platform 11 along the battery mounting holes 23 on the bottom panel 21, thereby limiting the entire workpiece by the positional relationship between the three battery mounting holes 23 on the side panel 22 and the bottom panel 21 and the five-way pipe 201, and completing the fixation of the workpiece before spot welding.

Claims

1. An assembly device for spot welding the rear triangle of an electric bicycle, comprising a supporting platform, characterized in that: The supporting platform is provided with a positioning block for fixing the central axis, a sheet metal bracket for fixing the bottom plate, two first quick clamps for respectively pressing against the rear triangle and the bottom plate, and a second quick clamp for fixing the side plate. A fixing hole is opened on the supporting platform, and a five-way fixing column for cooperating with the five-way tube on the central axis is also provided on the supporting platform. The five-way fixing column is located on the side close to the positioning block, and the fixing hole is equipped with a fixing pin shaft, which is used to position the battery mounting holes on the side plate and the bottom plate.

2. The assembly device for spot welding the rear triangle of an electric bicycle according to claim 1, characterized in that: The fixing pin includes a small diameter section and a large diameter section, the small diameter section is used to cooperate with the fixing hole, the large diameter section is located in the axial direction of the small diameter section, and the large diameter section is used to cooperate with the battery installation hole.

3. An assembly device for spot welding the rear triangle of an electric bicycle according to claim 1 or 2, characterized in that: The supporting platform is provided with a cavity which matches the side plate, and the second quick clamp is located on a side close to the cavity.

4. The assembly device for spot welding the rear triangle of an electric bicycle according to claim 2, characterized in that: The second quick clamp includes a support block and a clamping piece, wherein the clamping piece is fixedly arranged on the support block, and two through holes with large diameter sections for matching fixing pins are symmetrically arranged in the support block with the clamping piece as the center.

5. An assembly device for spot welding the rear triangle of an electric bicycle according to claim 1, 2 or 4, characterized in that: A recessed portion that fits with the outer surface of the central axis is formed in the positioning block.

6. The assembly device for spot welding the rear triangle of an electric bicycle according to claim 5, characterized in that: The carrying platform is provided with a sliding groove for the positioning block to move horizontally, and the positioning block is slidably matched with the carrying platform.

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