Welding fixture for electric bicycle frame

Abstract

The utility model discloses an electric bicycle frame welding fixture, which relates to the technical field of electric bicycle production and manufacturing, and comprises a head module, a middle module and a rear module which are sequentially arranged along a first direction, the head module is used for fixing a head assembly, the middle module is used for fixing each component in a middle assembly, and the rear module is used for fixing a rear assembly. The middle module is used for adjusting the distance between two opposite pipe fittings of a pedal pipe in the middle part assembly, the rear module is used for fixing the rear part assembly, and the rear module is used for adjusting the included angle between a seat rod in the rear part assembly and a straight line parallel to the first direction. According to the electric bicycle frame welding clamp, the welding stress influence can be reduced, and the quality of a welded product is better.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle production and manufacturing, in particular to a welding fixture for an electric bicycle frame. Background Art

[0002] In the production of electric vehicles, welding the head, middle, and rear subassemblies is a crucial step. During this welding process, the frame undergoes thermal deformation due to welding stress, which can lead to poor product quality. Therefore, there is an urgent need for a welding fixture for electric bicycle frames that can reduce the effects of welding stress and improve the quality of the welded product. Utility Model Content

[0003] The purpose of the utility model is to provide an electric bicycle frame welding fixture to solve the problems existing in the above-mentioned prior art, reduce the influence of welding stress, and improve the quality of the welded product.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides an electric bicycle frame welding fixture, comprising: a head module, a middle module and a rear module arranged in sequence along a first direction, the head module being used to fix a head subassembly, the middle module being used to fix various components in the middle subassembly, the middle module being configured to adjust the spacing between two opposite pipes of a pedal tube in the middle subassembly, the rear module being used to fix the rear subassembly, and the rear module being configured to adjust the angle between a seat rod in the rear subassembly and a straight line parallel to the first direction.

[0006] Preferably, it also includes a base plate, the head module includes a first slider, a head support structure, a head positioning member and a head clamping assembly, the base plate is provided with a first slide rail extending along a first direction, the first slider is slidably connected to the first slide rail, the head support structure is fixedly connected to the first slider, the head clamping assemblies are all fixedly connected to the head support structure, the head positioning member is fixedly connected to the head clamping assembly, the head positioning member is detachably connected to a head positioning pin, the head positioning pin is used to insert into the head tube of the head subassembly and fix the head tube, the head clamping assembly has a first free end, and the first free end can reciprocate on the extension line of the head positioning pin to clamp or loosen the head tube.

[0007] Preferably, the middle module includes a pedal tube fixing structure, and the pedal tube fixing structure includes two second sliders, two first positioning blocks, two first clamping cylinders and two positioning cylinders. Two second slide rails are provided on the bottom plate, and the two second slide rails extend along the second direction. The two second slide rails are sequentially arranged along the second direction and have a spacing in the second direction. The second direction is perpendicular to the first direction. The two second sliders are respectively slidably connected to the two second slide rails. The two first positioning blocks are respectively detachably connected to the two second sliders. The tops of the two first positioning blocks are each provided with a first slot. The two The first clamping slots extend along the first direction, and the two first clamping cylinders are respectively fixedly connected to the two first positioning blocks, and the two first clamping cylinders can clamp the pedal tube in the vertical direction; the two positioning cylinders are respectively fixedly connected to the head module and the rear module, and the piston rods of the two positioning cylinders are both arranged along the first direction, and a second positioning block is detachably connected to the piston rods of the two positioning cylinders, and the two second positioning blocks are respectively provided with a second clamping slot, and the two second clamping slots are arranged opposite to each other, and the two positioning cylinders can drive the two second positioning blocks to clamp the pedal tube in the horizontal direction.

[0008] Preferably, the middle module also includes a bottom tube fixing structure and a battery rack fixing structure, the bottom tube fixing structure includes a plurality of third positioning blocks and a plurality of bottom tube fixing parts, each of the third positioning blocks is detachably connected to the bottom plate along the first direction, the upper side of each of the third positioning blocks is provided with a bottom tube positioning slot, each of the bottom tube positioning slots extends along the first direction, and each of the bottom tube fixing parts is detachably connected to the bottom plate along the first direction, the upper side of each of the bottom tube fixing parts is provided with a bottom tube positioning pin and a magnetic suction part, the bottom tube positioning pin is used to be inserted into the hole on the bottom tube, and the magnetic suction part is used to adsorb the bottom tube; the battery rack fixing structure includes a support block and a second pressing cylinder, the support block is detachably connected to the bottom plate, a plurality of rack positioning pins are fixedly provided on the support block, the rack positioning pins can be inserted into the holes on the battery rack, the second pressing cylinder is fixedly connected to the support block, and the second pressing cylinder can press the battery rack onto the support block.

[0009] Preferably, the first pressing cylinder is a lever-type cylinder, and the second pressing cylinder is a rotary cylinder.

[0010] Preferably, the middle module also includes a footrest clamping assembly, which includes two footrest supports and two footrest cylinders. The footrest support is fixedly connected to the base plate, and the two footrest cylinders are fixedly connected to the footrest support. The footrest cylinder is a slide cylinder, and the slides of the two footrest cylinders are detachably connected with footrest positioning blocks. The two footrest positioning blocks are arranged opposite to each other, and a footrest positioning pin is fixedly provided on the footrest positioning block. The footrest positioning pin can be inserted into the hole on the footrest connector, and the footrest cylinder presses the footrest connector onto the foot pedal tube.

[0011] Preferably, the rear module includes a third slider, a rear support structure, a rear seat positioning block, a rear clamping assembly and two seat rod cylinders, the rear seat positioning block is detachably connected to the rear support structure, the rear seat positioning block is provided with a rear seat slot, the two seat rod cylinders are fixedly mounted on the rear support structure, the piston rods of the two seat rod cylinders are arranged opposite to each other in the horizontal direction, and the seat rod positioning blocks are detachably connected to the piston rods of the two seat rod cylinders; a third slide rail is provided on the rear support structure, the extension direction of the third slide rail is parallel to the first direction, the third slider is slidably connected to the third slide rail, and the rear clamping assembly has a second free end, which can move in the vertical direction to clamp the seat of the rear subassembly.

[0012] Preferably, the rear module also includes a partial support fixing structure, which includes a partial support block and a partial support cylinder. The partial support block is detachably connected to the base plate, and the partial support block has a partial support slot. The partial support cylinder is fixedly connected to the base plate, and the partial support cylinder can press the partial support onto the partial support slot.

[0013] 14. The repairing kit for automotive dents, according to claim 13, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw thread, and a nut. The bosses comprise a through-hole, a screw thread, and a nut. The side of the second slider facing the second adjusting block is provided with a middle screw hole corresponding to the position of the second through hole, the second pulling bolt can extend into the second through hole and be screwed into the middle screw hole, the second push bolt can be screwed into the second screw hole and abut against the side of the second slider; the rear module also includes a third adjusting block, a third pushing bolt and a third pulling bolt, the third adjusting block is fixedly connected to the rear supporting structure and is located at one end of the third slide rail, the third adjusting block is provided with a third screw hole and a third through hole, and the head supporting structure is provided with a rear screw hole corresponding to the position of the third through hole on the side facing the third adjusting block, the third pulling bolt can extend into the third through hole and be screwed into the rear screw hole, and the third push bolt can be screwed into the third screw hole and abut against the third slider.

[0014] Preferably, the head pressing assembly and the rear pressing assembly both include a support plate, a driving cylinder, a connecting piece, a guide piece, a pressure rod, a guide plate and a pressure block, the driving cylinder is fixedly connected to the support plate, the piston rod of the driving cylinder is perpendicular to the support plate, one end of the connecting piece is fixedly connected to the piston rod of the driving cylinder, and the other end is hinged with one end of the guide piece around a horizontal rotating shaft, the guide plate is fixedly connected to the support plate, a guide groove is provided on the guide plate, and the guide groove includes a straight segment and an arc segment, the straight segment extends from the bottom of the guide plate in a direction perpendicular to the support plate, and one end of the arc segment The first end is the first end, and the other end is the second end. The first end is connected to the upper end of the straight segment, and the arc segment extends from the first end to the second end in a direction away from the component pressed by the pressure block. A first guide pin is fixedly provided on the side of the connecting member facing the guide plate, and a second guide pin is provided on the side of the guide member facing the guide plate. The first guide pin and the second guide pin are both slidably connected in the guide groove, one end of the pressure rod is fixedly connected to the end of the guide member away from the connecting member, and the other end of the pressure rod is detachably connected to the second positioning block, and the second positioning block forms the second free end.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The electric bicycle frame welding fixture provided by the utility model is characterized in that, before formal welding, a trial production is first carried out to adjust the distance between the two tubes of the pedal tube relative to each other so that the distance between the two tubes is greater than the designed distance, and the angle of the seat post is adjusted (the angle of the seat post can be changed by adjusting the position of the seat in the first direction) so that the seat is further away from the head assembly than the designed position. Then, the various components are welded. During the cooling process of the components, the pedal tubes and the seat post gradually shift under the action of stress. The dimensions of the product are then measured. If the product dimensions meet the design requirements, the distance between the two tubes relative to the pedal tubes and the angle of the seat post (the position of the seat in the first direction can be recorded) before welding are recorded. During formal welding, the dimensional data before the trial production is installed to adjust the pedal tubes and the seat post, and formal welding is carried out. After cooling, the pedal tubes and the seat post can both produce the same amount of deformation as during the trial production and return to the designed dimensions, thereby reducing the impact of welding stress on product quality and improving product quality.

[0017] Furthermore, in the utility model, a head clamping assembly and a rear clamping assembly are used in conjunction with a lever-type cylinder and a rotary cylinder, which reduces the obstruction of the clamping structure to the frame during unloading, making the process of unloading the frame more convenient.

[0018] Furthermore, in the present invention, the head locating pin, the first locating block, the second locating block, the third locating block, the bottom tube fixing piece, the support block, the footrest support piece, the rear seat locating block, the seat post locating block, the partial support locating block, and the pressure block can all be disassembled. Compared with traditional welding fixes, these detachable structures can not only be disassembled and replaced when the frame size changes, thereby expanding the scope of application of the device, but can also be disassembled and replaced at any time when these structures are worn, thereby improving the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A three-dimensional structural diagram of the electric bicycle frame welding fixture provided by the utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the head module in the electric bicycle frame welding fixture provided by the utility model;

[0022] Figure 3 A three-dimensional structural diagram of the bottom tube fixing structure in the welding fixture for an electric bicycle frame provided by the present invention;

[0023] Figure 4 This is a three-dimensional structural diagram of the rear module of the electric bicycle frame welding fixture provided by the utility model;

[0024] Figure 5 for Figure 4 A three-dimensional structural diagram of the middle and rear compression assembly;

[0025] Figure 6 for Figure 5 Front view of the middle guide plate;

[0026] Figure 7 is a three-dimensional structural diagram of the third sliding block and the third adjusting block;

[0027] Figure 8 The three-dimensional structure diagram of the frame;

[0028] In the figure: 100, head module; 101, first slider; 102, head support structure; 103, head positioning member; 104, first adjustment block; 105, first screw hole; 106, first through hole; 200, middle module; 201, second slider; 202, first positioning block; 2021, first slot; 203, first pressing cylinder; 204, positioning cylinder; 2041, second positioning block; 2042, second slot; 205, third positioning block; 206, bottom tube fixing member; 2061, bottom tube positioning pin; 2062, magnetic attraction portion; 207, support block; 208, second pressing cylinder; 209, footrest cylinder; 2091, footrest positioning block; 2092, footrest positioning pin; 210, footrest support member; 211, second adjustment block; 212, second through hole; 213, second screw hole; 300, rear module; 301, third slider; 302, Rear support structure; 303, rear seat positioning block; 304, seat post cylinder; 305, third adjustment block; 306, third through hole; 307, third screw hole; 308, rear screw hole; 309, partial support block; 310-partial support cylinder; 400, bottom plate; 500, frame; 501, head tube; 502, front beam tube; 503, pedal tube; 504, bottom tube; 505, footrest connector; 506, battery compartment rack; 507, vehicle Seat; 508, seat rod; 509, rear seat; 510, partial support; 601, head clamping assembly; 602, rear clamping assembly; 603, support plate; 604, drive cylinder; 605, connecting piece; 6051, first guide pin; 606, guide piece, 6061-second guide pin; 607, pressure rod; 608, guide plate; 6081, guide groove; 6082, straight segment; 6083, arc segment; 609, pressure block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The purpose of the utility model is to provide an electric bicycle frame welding fixture to solve the problems existing in the above-mentioned prior art, reduce the influence of welding stress, and improve the quality of the welded product.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] First of all, it should be explained that the components of the electric vehicle involved in this solution include the head subassembly, the middle subassembly and the rear subassembly, wherein the head subassembly includes the front beam tube 502, the reinforcement box and the head tube 501, which have been welded and formed in other welding processes, and the rear seat subassembly includes the vehicle seat 507, the seat post 508 and the rear seat 509, which have also been welded and formed in other welding processes, and the middle subassembly includes the footrest tube 503, the footrest connector 505, the battery compartment rack 506, the bottom tube 504 and the side support 510. The multiple components in the middle subassembly are all loose parts and need to be welded and formed in this step, and the welded middle subassembly is welded and assembled with the head subassembly and the rear subassembly. During the welding process, the footrest tube 503 and the seat post are the most likely to be deformed due to welding stress. Among them, the footrest tube 503 is prone to shrinkage deformation, and the seat post 508 will move in the direction close to the head subassembly and form an angle with the vertical direction.

[0033] The utility model provides a welding fixture for an electric bicycle frame, such as Figure 1-7 As shown, it includes: a head module 100, a middle module 200 and a rear module 300 arranged in sequence along a first direction, the head module 100 is used to fix the head sub-assembly, the middle module 200 is used to fix the various components in the middle sub-assembly, the middle module 200 is constructed to adjust the distance between the two opposite pipes of the pedal tube 503 in the middle sub-assembly, and the rear module 300 is used to fix the rear sub-assembly, and the rear module 300 is constructed to adjust the angle between the seat rod 508 in the rear sub-assembly and a straight line parallel to the first direction.

[0034] The electric bicycle frame welding fixture provided by the present invention is first trial-produced before formal welding: the distance between the two opposite pipes of the pedal tube 503 is adjusted so that the distance between the two opposite pipes of the pedal tube 503 is greater than the designed distance, and the angle of the seat post 508 is adjusted (the angle of the seat post 508 can be changed by adjusting the position of the seat 507 in the first direction) so that the seat 507 is further away from the head assembly than the designed position, and then the various components are welded. During the cooling process of the components, the pedal tubes 503 and the seat post 508 gradually shift under the action of stress, and then the size of the product is measured. If the product size meets the design requirements, the distance between the two opposite pipes of the pedal tube 503 and the angle of the seat post 508 (the position of the seat 507 in the first direction can be recorded) before welding. During the formal welding, the dimensional data before the trial welding is installed to adjust the pedal tube 503 and the seat rod 508, and then the formal welding is carried out. After cooling, the pedal tube 503 and the seat rod 508 can produce the same deformation as in the trial production and return to the designed dimensions, thereby reducing the impact of welding stress on product quality and improving product quality. Figure 1The pedal tube 503 includes two first tubes and two second tubes. The two first tubes form the long sides of the pedal tube 503, and the two second tubes form the short sides of the pedal tube 503. A notch is designed on any of the second tubes. When the distance between the two first tubes is adjusted, the notch will become larger.

[0035] In a preferred embodiment of this embodiment, a base plate 400 is also included, and the head module 100 includes a first slider 101, a head support structure 102, a head positioning member 103 and a head clamping assembly 601. A first slide rail extending along a first direction is provided on the base plate 400, and the first slider 101 is slidably connected to the first slide rail. The head support structure 102 is fixedly connected to the first slider 101, and the head clamping assembly 601 is fixedly connected to the head support structure 102. The head positioning member 103 is fixedly connected to the head clamping assembly 601. A head positioning pin is detachably connected to the head positioning member 103, and the head positioning pin is used to insert into the head tube 501 of the head assembly and fix the head tube 501. The head clamping assembly 601 has a first free end, and the first free end can reciprocate on the extension line of the head positioning pin to clamp or loosen the head tube 501. During the trial production stage, the front beam tube 502 in the head subassembly is inserted into the first positioning pin, and the first positioning pin is compressed by the first clamping assembly to complete the fixation of the head subassembly; the head module 100 can change the relative position between the head subassembly and the rear subassembly during the trial production, and change the position of the head subassembly in the first direction by sliding the first slider 101, and then conduct trial production welding to make the cooled product closer to the design size, thereby improving the accuracy of the adjustment and further reducing the influence of welding stress.

[0036] In a preferred embodiment of this embodiment, the middle module 200 includes a pedal tube fixing structure, which includes two second sliders 201, two first positioning blocks 202, two first clamping cylinders 203 and two positioning cylinders 204. Two second slide rails are provided on the bottom plate 400. The two second slide rails extend along the second direction. The two second slide rails are arranged in sequence along the second direction and have a spacing in the second direction. The second direction is perpendicular to the first direction. The two second sliders 201 are respectively slidably connected to the two second slide rails. The two first positioning blocks 202 are respectively detachably connected to the two second sliders 201. The tops of the two first positioning blocks 202 are each provided with a first card slot 2021. The two first card slots 2021 both extend along the first direction, the two first clamping cylinders 203 are respectively fixedly connected to the two first positioning blocks 202, and the two first clamping cylinders 203 can clamp the pedal tube 503 in the vertical direction; the two positioning cylinders 204 are respectively fixedly connected to the head module 100 and the rear module 300, and the piston rods of the two positioning cylinders 204 are both arranged along the first direction, and a second positioning block 2041 is detachably connected to the piston rods of the two positioning cylinders 204, and the two second positioning blocks 2041 are respectively provided with a second slot 2042, and the two second slots 2042 are arranged opposite to each other. The two positioning cylinders 204 can drive the two second positioning blocks 2041 to clamp the pedal tube 503 in the horizontal direction. Before welding, the two opposite pipe fittings of the pedal tube 503 are set in the first slot 2021 on the first positioning block 202, and then the piston rods of the two positioning cylinders 204 are controlled to extend, and the other two opposite pipe fittings of the pedal tube 503 are clamped in the second slot 2042 to complete the fixation of the pedal tube 503. During trial production, the spacing between the two pipe fittings on the pedal tube 503 in the second direction can be adjusted by sliding the two first positioning blocks 202.

[0037] In a preferred embodiment of this embodiment, the middle module 200 further includes a bottom tube fixing structure and a battery rack fixing structure. The bottom tube fixing structure includes a plurality of third positioning blocks 205 and a plurality of bottom tube fixing members 206. Each third positioning block 205 is detachably connected to the bottom plate 400 in sequence along the first direction. A bottom tube positioning groove is provided on the upper side of each third positioning block 205. Each bottom tube positioning groove extends along the first direction. Each bottom tube fixing member 206 is detachably connected to the bottom plate 400 in sequence along the first direction. A bottom tube positioning pin 206 is provided on the upper side of each bottom tube fixing member 206. 1 and the magnetic part 2062, the bottom tube locating pin 2061 is used to be inserted into the hole on the bottom tube, and the magnetic part 2062 is used to adsorb the bottom tube 504; the battery compartment rack 506 fixing structure includes a support block 207 and a second clamping cylinder 208, the support block 207 is detachably connected to the bottom plate 400, and a plurality of rack locating pins are fixedly provided on the support block 207, and the rack locating pins can be inserted into the holes on the battery compartment rack 506, and the second clamping cylinder 208 is fixedly connected to the support block 207, and the second clamping cylinder 208 can clamp the battery compartment rack 506 on the support block 207. Before welding, the bottom tube 504 is set in the bottom tube positioning groove, and each bottom tube positioning pin 2061 is inserted into the preset hole on the bottom tube 504, and at the same time, the bottom tube 504 is adsorbed by the magnetic suction part 2062 to complete the fixation of the bottom tube 504; the battery compartment rack 506 is placed on the support block 207, and the rack positioning pin is inserted into the hole on the battery compartment rack 506, and then the second clamping cylinder 208 is used to clamp the battery compartment rack 506 to complete the fixation of the battery compartment rack 506.

[0038] In a preferred embodiment of this embodiment, the first pressing cylinder 203 is a lever-type cylinder, and the second pressing cylinder 208 is a rotary cylinder. The pressing arms of both the lever-type and rotary cylinders can move horizontally while vertically away from the pressed component, thereby leaving the upper portion of the pressed component unobstructed and making it easier to remove the component.

[0039] In a preferred implementation manner of this embodiment, the middle module 200 also includes a footrest clamping assembly, which includes two footrest supports 210 and two footrest cylinders 209. The footrest support 210 is fixedly connected to the base plate 400, and the two footrest cylinders 209 are fixedly connected to the footrest support 210. The footrest cylinders 209 are slide cylinders, and the slides of the two footrest cylinders 209 are detachably connected with footrest positioning blocks 2091. The two footrest positioning blocks 2091 are arranged opposite to each other, and the footrest positioning pins 2092 are fixedly provided on the footrest positioning blocks 2091. The footrest positioning pins 2092 can be inserted into the holes on the footrest connector 505, and the footrest cylinders 209 press the footrest connector 505 onto the pedal tube 503. Before welding, the footrest locating pin 2092 is inserted into the preset hole on the footrest connector 505, and the footrest connector 505 is pressed against the pedal tube 503 by moving the footrest cylinder 209 to complete the fixation of the footrest connector 505.

[0040] In a preferred implementation manner of this embodiment, the rear module 300 includes a third slider 301, a rear support structure 302, a rear seat positioning block 303, a rear clamping assembly 602 and two seat rod cylinders 304. The rear seat positioning block 303 is detachably connected to the rear support structure 302, and a rear seat slot is provided on the rear seat positioning block 303. The two seat rod cylinders 304 are fixedly mounted on the rear support structure 302. The piston rods of the two seat rod cylinders 304 are arranged opposite to each other, and the seat rod positioning blocks are detachably connected to the piston rods of the two seat rod cylinders 304. A third slide rail is provided on the rear support structure 302, and the extension direction of the third slide rail is parallel to the first direction. The third slider 301 is slidably connected to the third slide rail. The rear clamping assembly 602 has a second free end, and the second free end can move in the vertical direction to clamp the seat 507 of the rear subassembly. When fixing the rear subassembly, the rear seat 509 is set in the rear seat slot, and the seat post 508 is clamped by the seat post cylinder 304. At the same time, the second free end of the rear clamping component 602 is used to clamp the vehicle seat 507 in the vertical direction to complete the fixation of the rear subassembly; during trial production, the angle of the seat post 508 can be adjusted by adjusting the position of the rear clamping component 602.

[0041] In a preferred embodiment of this embodiment, rear module 300 further includes a lateral support fixing structure, comprising a lateral support block 309 and a lateral support cylinder 310. The lateral support block 309 is detachably connected to base plate 400. The lateral support block 309 has a lateral support 510 retaining slot. The lateral support 510 cylinder is fixedly connected to base plate 400 and is capable of pressing the lateral support 510 against the lateral support 510 retaining slot. Prior to welding, the lateral support 510 is positioned in the lateral support 510 retaining slot. The lateral support 510 cylinder's pressing arm then presses the lateral support 510 against the lateral support 510 welding position on seat post 508.

[0042] In a preferred embodiment of the present embodiment, the head module 100 further includes a first adjustment block 104, a first push bolt and a first pull bolt. The first adjustment block 104 is fixedly connected to the base plate 400 and is located at one end of the first slide rail. The first adjustment block 104 is provided with a first screw hole 105 and a first through hole 106. The first slider 101 is provided with a head screw hole corresponding to the position of the first through hole 106 on the side facing the first adjustment block 104. The first pull bolt can extend into the first through hole 106 and be screwed into the head screw hole. The first push bolt can be screwed into the first screw hole 105 and abut against the side of the head support structure 102; the middle module 200 further includes two second adjustment blocks 211, two second push bolts and two second pull bolts. The two second adjustment blocks 211 are fixedly connected to the base plate 400 and are respectively located at one end of each of the two second slide rails. The second adjustment block 211 is provided with a second screw hole 213 and a second Through hole 212, the two second sliders 201 are provided with a middle screw hole corresponding to the position of the second through hole 212 on the side facing the second adjustment block 211, the second pull bolt can be inserted into the second through hole 212 and screwed into the middle screw hole, the second push bolt can be screwed into the second screw hole 213 and abut against the side of the second slider 201; the rear module 300 also includes a third adjustment block 305, a third push bolt and a third pull bolt, the third adjustment block 305 is fixedly connected to the rear support structure 302 and is located at one end of the third slide rail, the third adjustment block 305 is provided with a third screw hole 307 and a third through hole 306, the head support structure 102 is provided with a rear screw hole 308 corresponding to the position of the third through hole 306 on the side facing the third adjustment block 305, the third pull bolt can be inserted into the third through hole 306 and screwed into the rear screw hole 308, the third push bolt can be screwed into the third screw hole 307 and abut against the third slider 301. Taking the rear module 300 as an example, Figure 7As shown, to increase the distance between the third slider 301 and the third adjustment block 305, the third tension bolt in the head screw hole is first unscrewed, and then the third push bolt is screwed into the third through hole 306. The end of the third bolt in the third screw hole 307 presses against the side of the third slider 301, pushing the third slider 301 away from the third adjustment block 305. To decrease the distance between the third slider 301 and the third adjustment block 305, the third push bolt in the third screw hole 307 is first unscrewed, and then the third tension bolt is inserted through the third through hole 306 and into the head screw hole. The nut of the third tension bolt presses against the periphery of the third through hole 306. As the third bolt is screwed deeper into the head screw hole, the third slider 301 slides toward the third adjustment block 305. The second slider 201 of the middle module 200 and the first slider 101 of the head module 100 are adjusted in the same manner as the third slider 301. The coordination of the bolts, through holes, and screw holes improves ease of adjustment.

[0043] In a preferred implementation manner of this embodiment, the head clamping assembly 601 and the rear clamping assembly 602 both include a support plate 603, a driving cylinder 604, a connecting piece 605, a guide piece 606, a pressure rod 607, a guide plate 608 and a pressure block 609. The driving cylinder 604 is arranged on the support plate 603, and the piston rod of the driving cylinder 604 is perpendicular to the support plate 603. One end of the connecting piece 605 is fixedly connected to the piston rod of the driving cylinder 604, and the other end is hinged with one end of the guide piece 606 around a horizontal rotation axis. The guide plate 608 is fixedly connected to the support plate 603, and a guide groove 6081 is provided on the guide plate 608. The guide groove 6081 includes a straight segment 6082 and an arc segment 6083. The straight segment 608 2 extends upward from the bottom of the guide plate 608 in a direction perpendicular to the support plate 603. One end of the arc segment 6083 is the first end, and the other end is the second end. The first end is connected to the upper end of the straight segment 6082, and the other end is closed. A first guide pin 6051 is fixedly provided on the side of the connecting member 605 facing the guide plate 608, and a second guide pin 6061 is provided on the side of the guide member 606 facing the guide plate 608. The first guide pin 6051 and the second guide pin 6061 are both slidably connected in the guide groove 6081. One end of the pressure rod 607 is fixedly connected to the end of the guide member 606 away from the connecting member 605. The other end of the pressure rod 607 is detachably connected to a pressure block 609, which forms the first free end or the second free end. When it is necessary to press the head tube 501, the piston rod of the driving cylinder 604 moves downward, and the first guide pin 6051 and the second guide pin 6061 slide along the guide groove 6081. When the first guide pin 6051 and the second guide pin 6061 slide to the straight section 6082, the pressing block 609 moves vertically and presses on the component; when the component is welded and the component needs to be removed, the piston of the driving cylinder 604 moves upward, and the first guide pin 6051 and the second guide pin 6061 slide along the straight section 6082. 082 slides upward, and the second guide pin 6061 slides upward along the straight section 6082. At this time, the pressing block 609 gradually moves away from the compressed component along the straight line; then the second guide pin 6061 slides obliquely upward and away from the arc section 6083. At this time, the pressing block 609 can slide obliquely (taking the head module 100 as an example, the pressing block 609 can slide and move away from the extension line of the head tube 501). The upper space of the compressed component will not be blocked, and the component can be taken out more easily.Among them, in the head clamping assembly 601 and the rear clamping assembly 602, two guide plates 608 are provided, and the two guide plates 608 are respectively arranged on the opposite sides of the guide member 606, and a first guide pin 6051 is respectively provided on both sides of the connecting member 605, and the two first guide pins 6051 are respectively slidably connected in the guide groove 6081 on the two guide plates 608, and a second guide pin 6061 is respectively provided on the opposite sides of the guide member 606, and the two second guide pins 6061 are respectively slidably connected in the guide groove 6081 on the two guide plates 608; in the head module 100, the support plate 603 is fixedly connected to the head support structure, and the head positioning member 103 is provided on the support plate 603; in the rear module 300, the support plate 603 is fixedly connected to the rear support structure, and the third slider is slidably connected to the support plate 603.

[0044] In addition, in the above-mentioned multiple embodiments, the head locating pin, the first locating block 202, the second locating block 2041, the third locating block 205, the bottom tube fixing part 206, the support block 207, the footrest support part 210, the rear seat locating block 303, the seat post locating block, the partial support 510 locating block, and the pressing block 609 are all removable, and all other components can also be set to be detachably connected as needed, and preferably connected by pins or bolts. Compared with traditional welding fixes, these detachable structures can not only be disassembled and replaced when the size of the frame 500 changes, thereby expanding the scope of application of the device, but also can be disassembled and replaced at any time when these structures are worn, thereby improving the convenience of using the device.

[0045] It should be noted that in the present invention, after the head part assembly, the middle part assembly and the rear part assembly are fixed, the lower end of the front beam tube 502 of the head part assembly corresponds to the welding position of the front beam tube 502 on the bottom tube 504 of the middle part assembly, two battery compartment racks 506 are provided and correspond to the welding positions of the battery compartment racks 506 on the pedal tube 503, the footrest connector 505 corresponds to the welding position of the pedal tube 503 on the pedal tube 503, the lower end of the seat rod 508 in the rear part assembly corresponds to the welding position of the seat rod 508 on the bottom tube 504, the side of the seat rod 508 corresponds to the welding position of the seat rod on the pedal tube 503, and the partial support 510 corresponds to the welding position of the partial support 510 on the seat rod 508.

[0046] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An electric bicycle frame welding fixture, characterized by: include: The head module, the middle module and the rear module are arranged in sequence along the first direction, the head module is used to fix the head subassembly, the middle module is used to fix the various components in the middle subassembly, the middle module is constructed to adjust the distance between the two opposite tubes of the pedal tube in the middle subassembly, the rear module is used to fix the rear subassembly, and the rear module is constructed to adjust the angle between the seat post in the rear subassembly and the straight line parallel to the first direction.

2. The electric bicycle frame welding fixture according to claim 1, characterized in that: It also includes a base plate, and the head module includes a first slider, a head support structure, a head positioning member and a head clamping assembly. The base plate is provided with a first slide rail extending along a first direction, the first slider is slidably connected to the first slide rail, the head support structure is fixedly connected to the first slider, and the head clamping assemblies are all fixedly connected to the head support structure, the head positioning member is fixedly connected to the head clamping assembly, and a head positioning pin is detachably connected to the head positioning member, and the head positioning pin is used to insert into the head tube of the head part assembly and fix the head tube, and the head clamping assembly has a first free end, and the first free end can reciprocate on the extension line of the head positioning pin to clamp or loosen the head tube.

3. The electric bicycle frame welding fixture according to claim 2, characterized in that: The middle module includes a pedal tube fixing structure, and the pedal tube fixing structure includes two second sliders, two first positioning blocks, two first clamping cylinders and two positioning cylinders. Two second slide rails are provided on the bottom plate, and the two second slide rails extend along the second direction. The two second slide rails are sequentially arranged along the second direction and have a spacing in the second direction. The second direction is perpendicular to the first direction. The two second sliders are respectively slidably connected to the two second slide rails. The two first positioning blocks are respectively detachably connected to the two second sliders. The tops of the two first positioning blocks are each provided with a first slot. The two first The slots extend along the first direction, and the two first clamping cylinders are respectively fixedly connected to the two first positioning blocks, and the two first clamping cylinders can clamp the pedal tube in the vertical direction; the two positioning cylinders are respectively fixedly connected to the head module and the rear module, and the piston rods of the two positioning cylinders are both arranged along the first direction, and a second positioning block is detachably connected to the piston rods of the two positioning cylinders, and the two second positioning blocks are respectively provided with a second slot, and the two second slots are arranged opposite to each other, and the two positioning cylinders can drive the two second positioning blocks to clamp the pedal tube in the horizontal direction.

4. The electric bicycle frame welding fixture according to claim 3, characterized in that: The middle module also includes a bottom tube fixing structure and a battery magazine rack fixing structure, the bottom tube fixing structure includes a plurality of third positioning blocks and a plurality of bottom tube fixing parts, each of the third positioning blocks is detachably connected to the bottom plate along the first direction, the upper side of each of the third positioning blocks is provided with a bottom tube positioning slot, each of the bottom tube positioning slots extends along the first direction, and each of the bottom tube fixing parts is detachably connected to the bottom plate along the first direction, the upper side of each of the bottom tube fixing parts is provided with a bottom tube positioning pin and a magnetic suction part, the bottom tube positioning pin is used to be inserted into the hole on the bottom tube, and the magnetic suction part is used to adsorb the bottom tube; the battery magazine rack fixing structure includes a support block and a second pressing cylinder, the support block is detachably connected to the bottom plate, a plurality of magazine rack positioning pins are fixedly provided on the support block, the magazine rack positioning pins can be inserted into the holes on the battery magazine rack, the second pressing cylinder is fixedly connected to the support block, and the second pressing cylinder can press the battery magazine rack onto the support block.

5. The electric bicycle frame welding fixture according to claim 4, characterized in that: The first pressing cylinder is a lever-type cylinder, and the second pressing cylinder is a rotary cylinder.

6. The electric bicycle frame welding fixture according to claim 4, characterized in that: The middle module also includes a footrest clamping assembly, which includes two footrest supports and two footrest cylinders. The footrest support is fixedly connected to the base plate, and the two footrest cylinders are fixedly connected to the footrest support. The footrest cylinder is a slide cylinder, and the slides of the two footrest cylinders are detachably connected with footrest positioning blocks. The two footrest positioning blocks are arranged opposite to each other, and a footrest positioning pin is fixedly provided on the footrest positioning block. The footrest positioning pin can be inserted into the hole on the footrest connector, and the footrest cylinder presses the footrest connector onto the foot pedal tube.

7. The electric bicycle frame welding fixture according to claim 4, characterized in that: The rear module includes a third slider, a rear support structure, a rear seat positioning block, a rear clamping assembly and two seat rod cylinders, the rear seat positioning block is detachably connected to the rear support structure, the rear seat positioning block is provided with a rear seat slot, the two seat rod cylinders are fixedly installed on the rear support structure, the piston rods of the two seat rod cylinders are arranged opposite to each other in the horizontal direction, and the seat rod positioning blocks are detachably connected to the piston rods of the two seat rod cylinders; a third slide rail is provided on the rear support structure, the extension direction of the third slide rail is parallel to the first direction, the third slider is slidably connected to the third slide rail, and the rear clamping assembly has a second free end, which can move in the vertical direction to clamp the seat of the rear subassembly.

8. The electric bicycle frame welding fixture according to claim 7, characterized in that: The rear module also includes a partial support fixing structure, which includes a partial support block and a partial support cylinder. The partial support block is detachably connected to the base plate, and the partial support block has a partial support slot. The partial support cylinder is fixedly connected to the base plate, and the partial support cylinder can press the partial support onto the partial support slot.

9. The electric bicycle frame welding fixture according to claim 7, characterized in that: The first screw hole and the second through hole are respectively provided on the second adjusting block, and the first screw hole and the second through hole are respectively provided on the second adjusting block, and the first screw hole and the second through hole are respectively provided on the second adjusting block. The two sliders are each provided with a middle screw hole corresponding to the position of the second through hole on the side facing the second adjusting block, the second pulling bolt can extend into the second through hole and be screwed into the middle screw hole, the second push bolt can be screwed into the second screw hole and abut against the side of the second slider; the rear module also includes a third adjusting block, a third pushing bolt and a third pulling bolt, the third adjusting block is fixedly connected to the rear supporting structure and is located at one end of the third slide rail, the third adjusting block is provided with a third screw hole and a third through hole, and the head support structure is provided with a rear screw hole corresponding to the position of the third through hole on the side facing the third adjusting block, the third pulling bolt can extend into the third through hole and be screwed into the rear screw hole, and the third push bolt can be screwed into the third screw hole and abut against the third slider.

10. The electric bicycle frame welding fixture according to claim 7, characterized in that: The head pressing assembly and the rear pressing assembly both include a support plate, a driving cylinder, a connecting piece, a guide piece, a pressure rod, a guide plate and a pressure block, the driving cylinder is fixedly connected to the support plate, the piston rod of the driving cylinder is perpendicular to the support plate, one end of the connecting piece is fixedly connected to the piston rod of the driving cylinder, and the other end is hinged with one end of the guide piece around a horizontal rotating shaft, the guide plate is fixedly connected to the support plate, a guide groove is provided on the guide plate, and the guide groove includes a straight segment and an arc segment, the straight segment extends from the bottom of the guide plate in a direction perpendicular to the support plate, and one end of the arc segment is The first end is the first end, and the other end is the second end. The first end is connected to the upper end of the straight segment, and the arc segment extends from the first end to the second end in a direction away from the component pressed by the pressure block. A first guide pin is fixedly provided on the side of the connecting member facing the guide plate, and a second guide pin is provided on the side of the guide member facing the guide plate. The first guide pin and the second guide pin are both slidably connected in the guide groove. One end of the pressure rod is fixedly connected to the end of the guide member away from the connecting member, and the other end of the pressure rod is detachably connected to the second positioning block, and the second positioning block forms the second free end.

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