Welding deformation prevention device
By using an anti-welding deformation device to push the foot tube to a preset distance before welding and restore it to the designed distance after welding, the problem of welding deformation of electric vehicle frames is solved, achieving low-cost and high-efficiency deformation control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-14
AI Technical Summary
In the current electric vehicle frame welding process, deformation of the tubing leads to dimensional deviations. Existing correction methods rely on manual operation, which is costly and inefficient.
An anti-welding deformation device is adopted, including a driving component, a first pushing component, and a second pushing component. The driving component drives the first and second pushing components to move away from each other, pushing the foot pedal tube to a preset distance. After welding, the deformation returns to the designed distance.
It reduced production costs, improved production efficiency, achieved mechanical error prevention, reduced manual correction, precisely controlled deformation, and increased production capacity per person-hour by 20%.
Smart Images
Figure CN224115440U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric vehicle manufacturing technology, and in particular to a device for preventing welding deformation. Background Technology
[0002] Electric bicycles are widely used by consumers as a daily means of transportation. The frame of an electric bicycle is welded from multiple tubing components. During the welding process, welding stress is generated between the tubing components. This stress can cause deformation of the tubing, leading to deviations in the distance between the tubing components, resulting in dimensions that do not conform to the original design and affecting the quality of the electric bicycle. Specifically, after the front ends of the two pedal tubes are welded to the head tube, and the middle sections of the two pedal tubes are welded to the cross tube, the pedal tubes should be welded to the reinforcing plate. During the welding of the reinforcing plate, the deviation at the rear ends of the two pedal tubes is most severe. The welding stress during this process can cause the distance between the rear ends of the two pedal tubes to be more than 10mm closer than the design distance. There are no good preventative measures during the welding process for this problem. Usually, the only solution is to move the frame to a calibration station after welding and manually operate a calibration machine to correct the deviation between the rear ends of the two pedal tubes to ensure the quality and functionality of the frame. However, current calibration methods require manual operation of the calibration machine and its associated molds and tools, which is labor-intensive and costly. Furthermore, manual calibration is dependent on the worker's skill level, resulting in insufficient precision in controlling deviations and relatively low production efficiency. Therefore, there is an urgent need for a lower-cost, more effective, and more efficient anti-welding deformation device. Utility Model Content
[0003] The purpose of this invention is to provide a device for preventing welding deformation, which solves the problems existing in the prior art, has lower cost, can effectively control deformation, and has higher production efficiency.
[0004] To achieve the above objectives, this utility model provides the following solution:
[0005] This utility model provides a device for preventing welding deformation, comprising: a driving member, a first pushing member and a second pushing member, wherein the first pushing member and the second pushing member are both connected to the driving member, the driving member is used to be disposed between two foot pedal tubes, the first pushing member and the second pushing member are used to contact the two foot pedal tubes respectively, and the driving member is configured to drive the first pushing member and the second pushing member away from each other to push the two foot pedal tubes away from each other.
[0006] In some embodiments, a straight line perpendicular to the two foot pedal tubes is a first straight line, and one first pusher and one second pusher are each provided, and the first pusher and the second pusher can move in opposite directions along the first straight line.
[0007] In some embodiments, a base is also included for fixing between the two foot pedal tubes. The driving component is a single-axis cylinder. The driving component, the first pushing component, and the second pushing component are all slidably connected to the base. The driving component, the first pushing component, and the second pushing component are all capable of sliding along the first straight line. The movement direction of the piston rod of the single-axis cylinder is parallel to the first straight line. The first pushing component is fixedly connected to the piston rod of the single-axis cylinder, and the second pushing component is fixedly connected to the cylinder body of the single-axis cylinder.
[0008] In some embodiments, the base includes a base plate and two guide plates. The base plate is fixedly connected between the two foot pedal tubes. The single-axis cylinder is fixedly connected to the base plate. The two guide plates are respectively fixedly connected to both ends of the base plate. Each of the two guide plates is provided with a guide hole. The axis of each of the two guide holes is parallel to the first straight line. The first pusher and the second pusher are slidably connected in the two guide holes.
[0009] In some embodiments, both the first pusher and the second pusher have a sliding portion, the side of which is in contact with the inner wall of the guide hole.
[0010] In some embodiments, two connectors are also included. The first pusher and the second pusher each have a connecting hole on their sides that are in contact with the foot pedal tube. The two connectors can extend into the connecting hole and connect to the piston rod and cylinder body of the single-axis cylinder, respectively.
[0011] In some embodiments, a slider is also included, which is fixedly connected to the base. The slider is provided with a groove, the extension direction of which is parallel to the first straight line, and the driving member is slidably connected to the groove.
[0012] In some embodiments, a cylinder positioning block is also included. One end of the cylinder positioning block is fixedly connected to the end of the single-axis cylinder body away from the piston rod, and the other end is fixedly connected to the second pusher. The cylinder positioning block is slidably connected in the slide groove, and the two opposite sides of the cylinder positioning block contact the two opposite inner sides of the slide groove, respectively.
[0013] In some embodiments, the two guide plates are a first guide plate and a second guide plate, the side of the first guide plate closer to the second guide plate is a first guide surface, and the side of the second guide plate opposite to the first guide surface is a second guide surface; the two pushers are a first pusher and a second pusher, the first pusher has a first limiting surface, the second pusher has a second limiting surface, the first limiting surface is disposed opposite to the first guide surface and can contact the first guide surface, and the second limiting surface is disposed opposite to the second guide surface and can contact the second guide surface.
[0014] In some embodiments, a limiting member is also included. The first pushing member is fixedly connected to the piston rod of the single-axis cylinder. The limiting member is fixedly connected to the first guide surface. The limiting member has a third limiting surface, which is disposed opposite to the first guide surface. The end of the first pushing member can contact the third limiting surface.
[0015] The present invention achieves the following technical advantages over the prior art:
[0016] The anti-welding deformation device provided by this utility model allows for the fixed installation of a drive component between two foot pedal tubes before welding. The drive component then moves a first and a second pusher component, displacing the two foot pedal tubes until a preset distance is reached between them. The positions of the first and second pusher components remain unchanged. After welding is completed, the first and second pusher components separate from the foot pedal tubes. At this point, under the influence of welding stress, the two foot pedal tubes deform and return to the designed distance. This eliminates the need for manual calibration using a calibration machine, reducing production costs. Mechanical error prevention replaces manual calibration, improving production efficiency and more effectively controlling deformation. Attached Figure Description
[0017] 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.
[0018] Figure 1 This is a three-dimensional structural diagram of the anti-welding deformation device in some embodiments of this utility model;
[0019] Figure 2 for Figure 1 A three-dimensional structural diagram of the first guide plate in the middle;
[0020] Figure 3 for Figure 1A three-dimensional structural diagram of the first pushing component;
[0021] Figure 4 for Figure 1 A three-dimensional structural diagram of the second pushing component;
[0022] Figure 5 for Figure 1 A three-dimensional structural diagram of the anti-welding deformation device pushing the foot pedal tube;
[0023] In the figure: 1. Driving component; 2. First pushing component; 21. Connecting hole; 22. Sliding part; 23. First limiting surface; 3. Second pushing component; 31. Second limiting surface; 4. Base; 41. Base plate; 42. Guide hole; 43. First guide plate; 431. First guide surface; 44. Second guide plate; 441. Second guide surface; 5. Sliding component; 51. Slide groove; 6. Cylinder positioning block; 7. Limiting component; 71. Third limiting surface; 8. Foot pedal tube. Detailed Implementation
[0024] 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.
[0025] The purpose of this invention is to provide a device for preventing welding deformation, which solves the problems existing in the prior art, has lower cost, can effectively control deformation, and has higher production efficiency.
[0026] 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.
[0027] This utility model provides a device for preventing welding deformation, such as Figure 1-5 As shown, it includes: a driving component 1, a first pushing component 2 and a second pushing component 3. The first pushing component 2 and the second pushing component 3 are both connected to the driving component 1. The driving component 1 is used to be disposed between two foot pedal tubes 8. The first pushing component 2 and the second pushing component 3 are used to contact the two foot pedal tubes 8 respectively. The driving component 1 is configured to drive the first pushing component 2 and the second pushing component 3 away from each other to push the two foot pedal tubes 8 away from each other.
[0028] The anti-welding deformation device provided by this utility model can fix the driving component 1 between the two foot pedal tubes 8 before welding. The driving component 1 drives the first pushing component 2 and the second pushing component 3 to move, so that the two foot pedal tubes 8 are far apart from each other until the distance between the two foot pedal tubes 8 is a preset distance. Then, the positions of the first pushing component 2 and the second pushing component 3 remain unchanged. After welding is completed, the first pushing component 2 and the second pushing component 3 are separated from the foot pedal tubes 8. At this time, under the action of welding stress, the two foot pedal tubes 8 deform and return to the designed distance. Taking specific values as an example: In a standard bicycle frame, the designed distance between the two pedal tubes 8 should be 35cm. If this anti-welding deformation device is not installed, and welding is performed with the distance between the two pedal tubes 8 at 35cm, welding deformation will cause the distance between the two pedal tubes 8 to shrink to 25cm. After installing the anti-welding deformation device, before welding, the first pusher 2 and the second pusher 3 push the two pedal tubes 8 to a preset distance of 45cm before welding. After welding, the welding deformation brings the two pedal tubes 8 closer together by 10cm, thus restoring the distance between the two pedal tubes 8 to the standard 35cm distance of the frame. This mechanical error prevention replaces manual calibration, reducing production costs, improving production efficiency, and more effectively controlling deformation. According to actual production applications, one less worker was required on the production line, and the unit hourly productivity (UPPH) increased by 20%. The difference between the preset distance and the designed distance is the amount of deformation caused by welding of the two pedal tubes.
[0029] In the first embodiment, the straight line perpendicular to the two foot pedal tubes 8 is called the first straight line. One first pushing member 2 and one second pushing member 3 are each provided. The first pushing member 2 and the second pushing member 3 can move in opposite directions along the first straight line. Because the first pushing member 2 and the second pushing member 3 move in opposite directions along the first straight line, the distance moved by the first pushing member 2 and the second pushing member 3 is equal to the distance moved by the two foot pedal tubes 8. This is more convenient to control the distance moved by the foot pedal tubes 8 compared to when the moving directions of the first pushing member 2 and the second pushing member 3 are at an angle to the first straight line.
[0030] It should be noted that, in addition to the above-described embodiment in which a first pusher 2 and a second pusher 3 move in opposite directions along a first straight line, multiple first pushers 2 or multiple second pushers 3 can also be provided. The first pusher 2 slides along a first direction, and the second pusher 3 slides along a second direction. Both the first and second directions have a certain angle with the first straight line, as long as the first pusher 2 and the second pusher 3 can push the two foot pedal tubes 8 away from each other when they move.
[0031] In the embodiment of Example 1, the anti-welding deformation device provided in this embodiment further includes a base 4, which is used to fix between two foot pedal tubes 8. The driving component 1 is a single-axis cylinder. The driving component 1, the first pushing component 2, and the second pushing component 3 are all slidably connected to the base 4. The driving component 1, the first pushing component 2, and the second pushing component 3 can all slide along a first straight line. The movement direction of the piston rod of the single-axis cylinder is parallel to the first straight line. The first pushing component 2 is fixedly connected to the piston rod of the single-axis cylinder, and the second pushing component 3 is fixedly connected to the cylinder body of the single-axis cylinder. Before welding, the piston rod of the single-axis cylinder extends, causing the first pushing component 2 to slide and press against one foot pedal tube 8. Then, the piston rod continues to extend, and the cylinder body of the single-axis cylinder slides along the first straight line, driving the second pushing component 3 to slide. The second pushing component 3 can also press against the other foot pedal tube 8. Afterward, the piston rod extends to a preset length, and the first pushing component 2 and the second pushing component 3 also push the distance between the two foot pedal tubes 8 to a preset distance.
[0032] To improve the stability of the device, in Embodiment 1, the base 4 includes a base plate 41 and two guide plates. The base plate 41 is fixedly connected between two foot pedal tubes 8. A single-axis cylinder is fixedly connected to the base plate 41. The two guide plates are fixedly connected to both ends of the base plate 41. Guide holes 42 are provided on both guide plates. The axes of the two guide holes 42 are parallel to the first straight line. The first pusher 2 and the second pusher 3 are slidably connected in the two guide holes 42.
[0033] In the first embodiment, both the first pusher 2 and the second pusher 3 have a sliding portion 22, the side of which is in contact with the inner wall of the guide hole 42. The guide hole 42 can limit the sliding portion 22, thereby effectively controlling the sliding direction of the first pusher 2 and the second pusher 3.
[0034] In the first embodiment, two connecting members are also included. Each of the first pushing member 2 and the second pushing member 3 has a connecting hole 21 on its side that contacts the foot pedal tube 8. The two connecting members can extend into the connecting holes 21 and connect to the piston rod and cylinder body of the single-axis cylinder, respectively. The connecting members can fix the first pushing member 2 and the second pushing member 3 to the piston rod and cylinder body of the single-axis cylinder, respectively. Preferably, the connecting members are bolts, and more preferably M8 bolts.
[0035] In the first embodiment, the anti-welding deformation device provided in this embodiment further includes a sliding member 5, which is fixedly connected to the base 4. The sliding member 5 is provided with a sliding groove 51, the extension direction of which is parallel to the first straight line. The driving member 1 is slidably connected to the sliding groove 51. When the piston rod extends, the single-axis cylinder can slide along the sliding groove 51, thus realizing the slidable connection between the driving member 1 and the base 4.
[0036] In the first embodiment, a cylinder positioning block 6 is also included. One end of the cylinder positioning block 6 is fixedly connected to the end of the single-axis cylinder body away from the piston rod, and the other end is fixedly connected to the second pusher 3. The cylinder positioning block 6 is slidably connected in the slide groove 51, and the two opposite sides of the cylinder positioning block 6 contact the two opposite inner sides of the slide groove 51. The contact between the sides of the cylinder positioning block 6 and the two opposite inner sides of the slide groove 51 can limit the single-axis cylinder in a direction perpendicular to the first straight line, preventing the sliding direction of the single-axis cylinder from deviating from the first straight line.
[0037] In the first embodiment, the two guide plates are a first guide plate 43 and a second guide plate 44. The side of the first guide plate 43 closest to the second guide plate 44 is a first guide surface 431, and the side of the second guide plate 44 opposite to the first guide surface 431 is a second guide surface 441. The first pusher 2 has a first limiting surface 23, and the second pusher 3 has a second limiting surface 31. The first limiting surface 23 is disposed opposite to the first guide surface 431 and can contact the first guide surface 431, and the second limiting surface 31 is disposed opposite to the second guide surface 441 and can contact the second guide surface 441. The first limiting surface 23 and the second limiting surface 31 can contact the first guide surface 431 and the second guide surface 441 respectively after the piston rod of the single-axis cylinder extends to a specified length, and restrict the position of the first pusher 2 and the second pusher 3 to prevent the first pusher 2 and the second pusher 3 from sliding out of the guide hole 42. At the same time, when the piston rod of the single-axis cylinder extends, the first guide surface 431 will first contact the first limiting surface 23 and generate a reaction force, thereby pushing the cylinder body of the single-axis cylinder to move away from the first guide surface.
[0038] In the embodiment of Example 1, the anti-welding deformation device provided in this embodiment further includes a limiting member 7. The first pushing member 2 is fixedly connected to the piston rod of the single-axis cylinder. The limiting member 7 is fixedly connected to the first guide surface 431. The limiting member 7 has a third limiting surface 71, which is disposed opposite to the first guide surface 431 and has a gap in a direction parallel to the first straight line. The end of the first pushing member 2 can contact the third limiting surface 71. When the piston rod of the single-axis cylinder retracts, the third limiting surface 71 on the first pushing member 2 will contact the end of the first pushing member 2 and restrict the position of the first pushing member 2, preventing the first pushing member 2 from sliding out of the guide hole 42.
[0039] 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 device for preventing welding deformation, characterized in that: include: The device includes a drive member, a first push member, and a second push member, both of which are connected to the drive member. The drive member is positioned between two pedal tubes. The first push member and the second push member are respectively in contact with the two pedal tubes. The drive member is configured to drive the first push member and the second push member away from each other to push the two pedal tubes away from each other.
2. The anti-welding deformation device according to claim 1, characterized in that: A straight line perpendicular to the two foot pedal tubes is a first straight line. One first pusher and one second pusher are each provided. The first pusher and the second pusher can move in opposite directions along the first straight line.
3. The anti-welding deformation device according to claim 2, characterized in that: It also includes a base for fixing between the two foot pedal tubes. The driving component is a single-axis cylinder. The driving component, the first pushing component, and the second pushing component are all slidably connected to the base. The driving component, the first pushing component, and the second pushing component can all slide along the first straight line. The movement direction of the piston rod of the single-axis cylinder is parallel to the first straight line. The first pushing component is fixedly connected to the piston rod of the single-axis cylinder, and the second pushing component is fixedly connected to the cylinder body of the single-axis cylinder.
4. The anti-welding deformation device according to claim 3, characterized in that: The base includes a base plate and two guide plates. The base plate is fixedly connected between the two foot pedal tubes. The single-axis cylinder is fixedly connected to the base plate. The two guide plates are respectively fixedly connected to both ends of the base plate. Each of the two guide plates is provided with a guide hole. The axis of each of the two guide holes is parallel to the first straight line. The first pusher and the second pusher are slidably connected in the two guide holes.
5. The anti-welding deformation device according to claim 4, characterized in that: Both the first pusher and the second pusher have a sliding portion, and the side of the sliding portion is in contact with the inner wall of the guide hole.
6. The anti-welding deformation device according to claim 3, characterized in that: It also includes two connectors. The first pusher and the second pusher each have a connecting hole on their sides that are in contact with the foot pedal tube. The two connectors can extend into the connecting hole and connect to the piston rod and cylinder body of the single-axis cylinder, respectively.
7. The anti-welding deformation device according to claim 4, characterized in that: It also includes a slider, which is fixedly connected to the base. The slider is provided with a groove, the extension direction of which is parallel to the first straight line. The driving member is slidably connected to the groove.
8. The anti-welding deformation device according to claim 7, characterized in that: It also includes a cylinder positioning block, one end of which is fixedly connected to the end of the single-shaft cylinder body away from the piston rod, and the other end is fixedly connected to the second pusher. The cylinder positioning block is slidably connected in the slide groove, and the two opposite sides of the cylinder positioning block contact the two opposite inner sides of the slide groove, respectively.
9. The anti-welding deformation device according to claim 4, characterized in that: The two guide plates are a first guide plate and a second guide plate, respectively. The side of the first guide plate closer to the second guide plate is a first guide surface, and the side of the second guide plate opposite to the first guide surface is a second guide surface. The two pushing members are a first pushing member and a second pushing member, respectively. The first pushing member has a first limiting surface, and the second pushing member has a second limiting surface. The first limiting surface is opposite to the first guide surface and can contact the first guide surface, and the second limiting surface is opposite to the second guide surface and can contact the second guide surface.
10. The anti-welding deformation device according to claim 9, characterized in that: It also includes a limiting member, the first pushing member is fixedly connected to the piston rod of the single-axis cylinder, the limiting member is fixedly connected to the first guide surface, the limiting member has a third limiting surface, the third limiting surface is disposed opposite to the first guide surface, and the end of the first pushing member can contact the third limiting surface.