A welding positioning tool for a bottom frame of an electric tricycle

Abstract

The utility model discloses a bottom frame welding positioning tool for electric tricycle, including bottom plate, and the top of bottom plate is provided with the bearing plate, the top of bearing plate is installed with positioning assembly, and the inside of bearing plate is provided with the multiple sets of mounting hole of flexible installation for positioning assembly, be used for realizing the fixed mechanism of positioning assembly steady installation on bearing plate, and the fixed mechanism sets up at the bottom of positioning assembly, the utility model discloses the cooperation setting of bottom plate, bearing plate, multiple sets of mounting hole, positioning assembly and fixed mechanism, the fixed mechanism of positioning assembly bottom can be according to the operation of positioning demand, first, the fixed rod is inserted to the two sets of mounting hole of bearing plate, completes the preliminary positioning of positioning assembly, again through the radial displacement of fixed rod of the limiting hole of limiting board constraint, utilize the internal thread of fixed rod outside and the external thread of fixed cylinder inside engagement realization screw locking simultaneously, make positioning assembly can be flexible adjustment position, can also steady installation on bearing plate.

Description

Technical Field

[0001] This utility model relates to the field of electric tricycle manufacturing technology, specifically to a welding and positioning fixture for the chassis of an electric tricycle. Background Technology

[0002] The chassis of an electric tricycle is the core load-bearing structure of the entire vehicle. Its welding precision directly determines the assembly precision, structural strength, and driving safety of the entire vehicle. To prevent the chassis from shifting during the welding process, it is necessary to use positioning fixtures to accurately fix the chassis. Therefore, the stability and locking reliability of the positioning fixtures are key to ensuring welding quality. Currently, the locking force of the positioning structure in existing chassis welding positioning fixtures is insufficient. The continuous vibration generated during the welding process can easily cause the positioning components to loosen, which in turn causes the chassis to shift and affects the welding precision.

[0003] As disclosed in the prior art, Chinese utility model publication CN222221593U discloses a welding positioning device for an electric tricycle frame. This utility model includes a base frame and a receiving plate installed on the top of the base frame. The receiving plate has a positioning hole at the top and an annular groove at the inner edge of the positioning hole. A first positioning component and a second positioning component are installed at the positioning hole to assist in positioning and fastening the frame. An auxiliary positioning fixing component is installed on the first positioning component and the second positioning component. The fixing component includes a plug-in cylinder, which has a reset cavity and a compression cavity from top to bottom. A reset spring for pushing the auxiliary sleeve disc is installed in the reset cavity. In the above structure, the first positioning component and the second positioning component are locked and fixed by the reset spring in the fixing component pushing the ball into the annular groove. However, relying on a single reset spring to provide locking force, the spring is prone to elasticity decay under high-frequency vibration environment during welding, which leads to loosening of the ball and the annular groove. That is, there is the problem of insufficient locking force in the positioning structure mentioned above. Therefore, we need to propose a welding positioning fixture for the base frame of an electric tricycle. Utility Model Content

[0004] The purpose of this utility model is to provide a welding and positioning fixture for the chassis of an electric tricycle. By setting up a base plate, a bearing plate, multiple sets of mounting holes, a positioning component, and a fixing mechanism, the fixing rod in the fixing mechanism is first inserted into two sets of mounting holes in the bearing plate to achieve initial positioning of the positioning component. Then, the radial displacement of the fixing rod is constrained by the limiting holes of the limiting plate. At the same time, the internal thread on the outside of the fixing rod engages with the external thread inside the fixing cylinder to achieve thread locking. Finally, the positioning component can be flexibly and stably installed on the bearing plate, thereby solving the problems mentioned in the background art.

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

[0006] A welding and positioning fixture for the chassis of an electric tricycle includes: a base plate, with a bearing plate on the top of the base plate; a positioning component mounted on the top of the bearing plate; and multiple sets of mounting holes for flexible installation of the positioning component inside the bearing plate; a fixing mechanism for stably mounting the positioning component on the bearing plate, and the fixing mechanism being located at the bottom of the positioning component; the fixing mechanism includes a mounting plate, two sets of fixing rods, a limiting plate, two sets of limiting holes, two sets of fixing cylinders, two sets of internal threads, and two sets of external threads; the mounting plate is fixedly mounted on the bottom of the positioning component; both sets of fixing rods are fixedly mounted on the bottom of the mounting plate, and the two sets of fixing rods are inserted into two sets of mounting holes; the limiting plate is located at the bottom of the bearing plate, and two sets of limiting holes are provided inside the limiting plate for the fixing rods to pass through; the two sets of fixing cylinders are respectively located at the bottom ends of the two sets of fixing rods; internal threads are provided on the outer sides of the two sets of fixing rods, and external threads are provided inside the two sets of fixing cylinders.

[0007] Preferably, multiple sets of limiting blocks arranged in a circular array are installed on the outer sides of the two sets of fixing rods, and multiple sets of limiting grooves for the limiting blocks to be inserted are opened inside the bearing plate.

[0008] Preferably, it also includes a lifting mechanism for easy adjustment of the support plate, and the lifting mechanism is located on the top of the base plate.

[0009] Preferably, the lifting mechanism includes a U-shaped frame, a motor, a threaded rod, a movable plate, multiple sets of connecting blocks, and two sets of fixed blocks; the U-shaped frame is fixedly installed on the top of the base plate, the motor is fixedly installed on the top of the U-shaped frame, and the output end of the motor is fixedly connected to the top end of the threaded rod through a coupling; the top end of the threaded rod is rotatably installed on the inner top of the U-shaped frame; the movable plate is threadedly connected to the outer side of the threaded rod; the tops of the multiple sets of connecting blocks are all fixedly installed on the bottom of the movable plate, and the bottoms of the multiple sets of connecting blocks are respectively fixedly installed on the tops of the two sets of fixed blocks; the two sets of fixed blocks are respectively fixedly installed on both sides of the bearing plate.

[0010] Preferably, the lifting mechanism further includes multiple sets of sliders and multiple sets of sliding grooves; two sets of sliders are fixedly installed on both sides of the moving plate, and two sets of sliding grooves are respectively opened on both sides of the inside of the C-shaped frame for the sliders to slide.

[0011] Preferably, a support plate is fixedly installed inside the C-shaped frame, and the bottom end of the threaded rod is rotatably mounted on the top of the support plate.

[0012] Preferably, the support plate has multiple sets of through slots inside, and the multiple sets of connecting blocks are slidably disposed in the multiple sets of through slots.

[0013] Preferably, the top of the base plate has two sets of grooves symmetrically formed, and the outer walls of the two sets of fixing blocks are respectively adapted to the inner walls of the two sets of grooves.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model utilizes a combination of a base plate, a support plate, multiple sets of mounting holes, a positioning component, and a fixing mechanism. The support plate and the multiple sets of mounting holes allow for flexible adjustment of the positioning component's installation position according to the positioning requirements of electric tricycle chassis of different sizes and structures, significantly improving the tooling's versatility. Simultaneously, the fixing mechanism at the bottom of the positioning component operates according to positioning requirements. First, the fixing rod is inserted into two sets of mounting holes on the support plate to complete the initial positioning of the positioning component. Then, the radial displacement of the fixing rod is constrained by the limiting holes of the limiting plate. Simultaneously, the internal thread on the outside of the fixing rod engages with the external thread inside the fixing cylinder to achieve threaded locking. This allows the positioning component to be flexibly adjusted in position while remaining stably mounted on the support plate. Compared to traditional spring locking methods, this threaded connection offers more stable locking force and better resistance to welding vibration, effectively preventing chassis displacement due to loose positioning components, thereby ensuring the subsequent welding accuracy of the chassis. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Schematic diagram of the structure of area A in the middle;

[0018] Figure 3 This is a schematic diagram of the lifting mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the fixing mechanism of this utility model.

[0020] In the diagram: 1. Base plate; 2. Bearing plate; 3. Positioning component; 4. Mounting hole; 5. Fixing mechanism; 51. Mounting plate; 52. Fixing rod; 53. Limiting plate; 54. Limiting hole; 55. Fixing cylinder; 56. Internal thread; 57. External thread; 6. Limiting block; 7. Limiting groove; 8. Lifting mechanism; 81. C-shaped frame; 82. Motor; 83. Threaded rod; 84. Moving plate; 85. Connecting block; 86. Fixing block; 87. Sliding block; 88. Slide groove; 9. Support plate; 10. Through groove; 11. Groove. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4 This utility model provides a technical solution:

[0023] A welding and positioning fixture for the chassis of an electric tricycle includes: a base plate 1, with a support plate 2 on the top of the base plate 1, a positioning component 3 mounted on the top of the support plate 2, and multiple sets of mounting holes 4 for flexible installation of the positioning component 3 inside the support plate 2; a fixing mechanism 5 for stably mounting the positioning component 3 on the support plate 2, and the fixing mechanism 5 is located at the bottom of the positioning component 3; the fixing mechanism 5 includes a mounting plate 51, two sets of fixing rods 52, a limiting plate 53, two sets of limiting holes 54, two sets of fixing cylinders 55, two sets of internal threads 56, and... Two sets of external threads 57; the mounting plate 51 is fixedly installed at the bottom of the positioning assembly 3, and two sets of fixing rods 52 are fixedly installed at the bottom of the mounting plate 51. The two sets of fixing rods 52 are inserted into two sets of mounting holes 4. The limiting plate 53 is set at the bottom of the bearing plate 2, and the limiting plate 53 has two sets of limiting holes 54 for the fixing rods 52 to pass through. Two sets of fixing cylinders 55 are respectively set at the bottom end of the two sets of fixing rods 52. The outer sides of the two sets of fixing rods 52 are respectively provided with internal threads 56, and the interiors of the two sets of fixing cylinders 55 are respectively provided with external threads 57.

[0024] In this embodiment, the multiple sets of mounting holes 4 on the bearing plate 2 can flexibly adjust the installation position of the positioning component 3 according to the size and structural requirements of the electric tricycle chassis to be welded, greatly improving the adaptability of the tooling to chassis of different specifications. At the same time, the bearing plate 2 can also install different types of positioning components 3 according to actual positioning requirements (the positioning component 3 is an existing structure, and its specific positioning method for the chassis will not be described in detail here). Moreover, the fixing mechanism 5 under all positioning components 3 has the same structure and strong versatility. The fixing mechanism 5 achieves a stable connection between the positioning component 3 and the bearing plate 2 through multiple cooperations: fixing the positioning component 3 with the mounting plate 51, inserting the fixing rod 52 into the mounting hole 4 to achieve initial positioning, limiting the radial displacement of the fixing rod 52 with the limiting plate 53, and completing the axial locking by the threaded engagement of the fixing cylinder 55 and the fixing rod 52. Compared with the traditional spring locking method, its locking force is stronger, which can effectively avoid the loosening of the positioning component 3 caused by welding vibration, thereby ensuring the welding positioning accuracy of the chassis.

[0025] Multiple sets of limiting blocks 6 arranged in a ring array are installed on the outer sides of the two sets of fixing rods 52, and multiple sets of limiting grooves 7 are opened inside the bearing plate 2 for the limiting blocks 6 to be inserted.

[0026] Among them, the outer side of the fixing rod 52 is provided with a ring array of limiting blocks 6, which, together with the limiting groove 7 inside the bearing plate 2, allows the limiting blocks 6 to be simultaneously embedded in the limiting groove 7 when the fixing rod 52 is inserted into the mounting hole 4. This can further constrain the circumferential rotation of the fixing rod 52, prevent the positioning component 3 from shifting due to the rotation of the fixing rod 52 during installation or welding, improve the accuracy and stability of the initial positioning of the positioning component 3, provide a reliable foundation for the subsequent threaded locking of the fixing mechanism 5, and indirectly ensure the overall locking effect of the positioning component 3.

[0027] It also includes a lifting mechanism 8 for easy adjustment of the support plate 2, and the lifting mechanism 8 is located on the top of the base plate 1.

[0028] In a further preferred embodiment, the lifting mechanism 8 can flexibly adjust the height of the support plate 2 according to the installation requirements of the positioning component 3, thereby facilitating the installation and disassembly of the fixing mechanism 5 and improving operational convenience.

[0029] The lifting mechanism 8 includes a U-shaped frame 81, a motor 82, a threaded rod 83, a movable plate 84, multiple sets of connecting blocks 85, and two sets of fixing blocks 86. The U-shaped frame 81 is fixedly installed on the top of the base plate 1, the motor 82 is fixedly installed on the top of the U-shaped frame 81, and the output end of the motor 82 is fixedly connected to the top of the threaded rod 83 through a coupling. The top of the threaded rod 83 is rotatably installed on the inner top of the U-shaped frame 81. The movable plate 84 is threadedly connected to the outer side of the threaded rod 83. The tops of the multiple sets of connecting blocks 85 are all fixedly installed on the bottom of the movable plate 84, and the bottoms of the multiple sets of connecting blocks 85 are respectively fixedly installed on the tops of the two sets of fixing blocks 86. The two sets of fixing blocks 86 are respectively fixedly installed on both sides of the bearing plate 2.

[0030] Among them, the motor 82 can be a Y2 series three-phase asynchronous motor. The motor 82 drives the threaded rod 83 to rotate. With the threaded connection between the moving plate 84 and the threaded rod 83, the rotational motion of the motor 82 can be converted into the linear lifting motion of the moving plate 84. The moving plate 84 then drives the bearing plate 2 to lift synchronously through the connecting block 85 and the fixed block 86, realizing the electric adjustment of the height of the bearing plate 2. Compared with the traditional manual adjustment method, this electric adjustment method is more labor-saving, more efficient, and has a stable transmission structure. It can accurately control the lifting height of the bearing plate 2. At the same time, the bearing plate 2 can provide more operating space after it is raised, which facilitates the installation of the positioning component 3 and effectively avoids the problem of difficulty in disassembling and assembling the fixing mechanism 5 due to limited operating space.

[0031] The lifting mechanism 8 also includes multiple sets of sliders 87 and multiple sets of slide grooves 88; two sets of sliders 87 are fixedly installed on both sides of the movable plate 84, and two sets of slide grooves 88 are opened on both sides inside the frame 81 for the sliders 87 to slide.

[0032] Specifically, the sliders 87 on both sides of the movable plate 84 slide along the grooves 88 inside the frame 81, which can effectively constrain the movement direction of the movable plate 84, prevent the movable plate 84 from shifting circumferentially as the threaded rod 83 rotates, ensure that the movable plate 84 always rises and falls smoothly in the vertical direction, avoid the bearing plate 2 from tilting due to the offset of the movable plate 84, and ensure the stability of the bearing plate 2 during the lifting process.

[0033] A support plate 9 is fixedly installed inside the bracket 81, and the bottom end of the threaded rod 83 is rotatably installed on the top of the support plate 9.

[0034] Among them, the support plate 9 provides bidirectional support to the threaded rod 83 from both the top of the bracket 81 and the support plate 9, which greatly enhances the stability of the threaded rod 83 during rotation, reduces the rotational sway caused by the long length of the threaded rod 83, extends the service life of the threaded rod 83 and the lifting mechanism 8 as a whole, and ensures the smoothness of the lifting process of the bearing plate 2.

[0035] The support plate 9 has multiple sets of through grooves 10 inside, and multiple sets of connecting blocks 85 are slidably disposed in the multiple sets of through grooves 10.

[0036] Specifically, by opening a through groove 10 inside the support plate 9, the connecting block 85 can slide along the through groove 10, which can precisely constrain the movement trajectory of the connecting block 85, prevent the connecting block 85 from shifting laterally when it rises and falls with the moving plate 84, and ensure that multiple sets of connecting blocks 85 drive the fixed block 86 and the bearing plate 2 to rise and fall synchronously. This avoids asynchronous rising and falling of the two sides of the bearing plate 2 due to the offset of the connecting block 85, and further improves the overall stability and operating accuracy of the lifting mechanism 8.

[0037] Two sets of grooves 11 are symmetrically provided on the top of the base plate 1, and the outer walls of the two sets of fixing blocks 86 are respectively adapted to the inner walls of the two sets of grooves 11.

[0038] Specifically, by opening a groove 11 on the top of the base plate 1 that is compatible with the fixing block 86, when the support plate 2 is lowered to the working height by the lifting mechanism 8, the fixing block 86 can be simultaneously embedded in the groove 11. The limiting effect of the groove 11 on the fixing block 86 enhances the stability of the support plate 2 after placement, avoids the base frame positioning deviation caused by slight shaking of the support plate 2 during the welding process, and provides a clear descent positioning benchmark for the support plate 2, eliminating the need for manual calibration of the position of the support plate 2.

[0039] Working principle: When using this utility model, the bearing plate 2 should first be adjusted to a height that facilitates the installation of the positioning component 3 and the fixing mechanism 5. Start the motor 82. The output end of the motor 82 drives the threaded rod 83 to rotate between the top of the frame 81 and the top of the support plate 9 through the coupling. Since the moving plate 84 is threadedly connected to the threaded rod 83, and the sliders 87 on both sides of the moving plate 84 slide along the sliding groove 88 inside the frame 81, the rotation of the threaded rod 83 will drive the moving plate 84 to rise in the vertical direction. The moving plate 84 then drives the two sets of fixing blocks 86 to rise through multiple sets of connecting blocks 85, thereby causing the bearing plate 2, which is fixedly connected to the fixing blocks 86, to rise synchronously. After the bearing plate 2 is adjusted to a suitable height, turn off the motor 82.

[0040] After the height of the support plate 2 is adjusted, the installation position of the positioning component 3 on the support plate 2 is determined according to the size and structural requirements of the electric tricycle chassis to be welded: the two sets of fixing rods 52 connected to the bottom mounting plate 51 of the positioning component 3 are aligned with the two sets of mounting holes 4 on the support plate 2 and inserted, while the multiple sets of limiting blocks 6 on the outside of the fixing rods 52 are precisely inserted into the multiple sets of limiting grooves 7 inside the support plate 2 to complete the initial positioning of the positioning component 3;

[0041] Next, the positioning component 3 is locked and fixed by the fixing mechanism 5: at the bottom of the bearing plate 2, the two sets of limiting holes 54 of the limiting plate 53 are aligned with the two sets of fixing rods 52 and sleeved, so that the fixing rods 52 pass through the limiting holes 54. The limiting plate 53 further constrains the radial displacement of the fixing rods 52 to prevent the fixing rods 52 from shaking. Then, the two sets of fixing cylinders 55 are respectively sleeved on the bottom ends of the two sets of fixing rods 52. The internal thread 56 on the outside of the fixing rod 52 is engaged with the external thread 57 inside the fixing cylinder 55. The fixing cylinder 55 is rotated until it is tightly attached to the bottom of the limiting plate 53, so as to achieve axial locking between the positioning component 3 and the bearing plate 2 and ensure that the positioning component 3 is stably installed. The other positioning components 3 can be installed according to the same steps as above according to the actual positioning requirements.

[0042] After all positioning components 3 are installed, start motor 82 to reverse, driving moving plate 84, connecting block 85, fixing block 86 and bearing plate 2 to move downwards synchronously until fixing block 86 is embedded in groove 11 at the top of base plate 1, ensuring that bearing plate 2 is placed stably. Finally, place the electric tricycle chassis on bearing plate 2, and use the installed positioning components 3 to accurately position the chassis, then proceed with subsequent welding operations.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding and positioning fixture for the chassis of an electric tricycle, characterized in that, include: The base plate (1) is provided with a support plate (2) on the top of the base plate (1). A positioning component (3) is installed on the top of the support plate (2). The support plate (2) has multiple sets of mounting holes (4) for the positioning component (3) to be flexibly installed. A fixing mechanism (5) is used to stably install the positioning component (3) on the support plate (2), and the fixing mechanism (5) is located at the bottom of the positioning component (3); The fixing mechanism (5) includes a mounting plate (51), two sets of fixing rods (52), a limiting plate (53), two sets of limiting holes (54), two sets of fixing cylinders (55), two sets of internal threads (56), and two sets of external threads (57). The mounting plate (51) is fixedly installed at the bottom of the positioning component (3). The two sets of fixing rods (52) are fixedly installed at the bottom of the mounting plate (51), and the two sets of fixing rods (52) are inserted into the two sets of mounting holes (4). The limiting plate (53) is set at the bottom of the bearing plate (2), and the limiting plate (53) has two sets of limiting holes (54) for the fixing rods (52) to pass through. The two sets of fixing cylinders (55) are respectively set at the bottom of the two sets of fixing rods (52). The two sets of fixing rods (52) have internal threads (56) on their outer sides, and the two sets of fixing cylinders (55) have external threads (57) inside.

2. The welding and positioning fixture for the chassis of an electric tricycle according to claim 1, characterized in that: Multiple sets of limiting blocks (6) arranged in a ring array are respectively installed on the outer side of the two sets of fixing rods (52), and multiple sets of limiting grooves (7) are opened inside the bearing plate (2) for the limiting blocks (6) to be inserted.

3. The welding and positioning fixture for the chassis of an electric tricycle according to claim 2, characterized in that: It also includes a lifting mechanism (8) for easy adjustment of the bearing plate (2), and the lifting mechanism (8) is located on the top of the base plate (1).

4. The welding and positioning fixture for the chassis of an electric tricycle according to claim 3, characterized in that: The lifting mechanism (8) includes a U-shaped frame (81), a motor (82), a threaded rod (83), a moving plate (84), multiple sets of connecting blocks (85), and two sets of fixing blocks (86); The C-shaped frame (81) is fixedly installed on the top of the base plate (1), the motor (82) is fixedly installed on the top of the C-shaped frame (81), and the output end of the motor (82) is fixedly connected to the top of the threaded rod (83) through a coupling. The top of the threaded rod (83) is rotatably installed on the inner top of the C-shaped frame (81). The movable plate (84) is threadedly connected to the outside of the threaded rod (83). The tops of multiple sets of connecting blocks (85) are fixedly installed on the bottom of the movable plate (84), and the bottoms of multiple sets of connecting blocks (85) are respectively fixedly installed on the tops of two sets of fixing blocks (86). The two sets of fixing blocks (86) are respectively fixedly installed on both sides of the bearing plate (2).

5. The welding and positioning fixture for the chassis of an electric tricycle according to claim 4, characterized in that: The lifting mechanism (8) also includes multiple sets of sliders (87) and multiple sets of slides (88); Two sets of sliders (87) are fixedly installed on both sides of the movable plate (84), and two sets of sliding grooves (88) are opened on both sides inside the shaped frame (81) for the sliders (87) to slide.

6. The welding and positioning fixture for the chassis of an electric tricycle according to claim 5, characterized in that: The support plate (9) is fixedly installed inside the shaped frame (81), and the bottom end of the threaded rod (83) is rotatably installed on the top of the support plate (9).

7. The welding and positioning fixture for the chassis of an electric tricycle according to claim 6, characterized in that: The support plate (9) has multiple sets of through slots (10) inside, and multiple sets of connecting blocks (85) are slidably disposed in the multiple sets of through slots (10).

8. The welding and positioning fixture for the chassis of an electric tricycle according to claim 4, characterized in that: The top of the base plate (1) is symmetrically provided with two sets of grooves (11), and the outer walls of the two sets of fixing blocks (86) are respectively adapted to the inner walls of the two sets of grooves (11).

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