Welding device for rear axle flange plate and connecting pipe

Abstract

The invention discloses a welding device for a rear axle flange plate and a connecting pipe, and belongs to the technical field of welding equipment. A supporting assembly, a butt joint assembly and a welding assembly are arranged on the bottom plate. The butt joint assembly comprises a rotating disc which is rotationally connected to the bottom plate, a positioning face is arranged on the side, close to the supporting assembly, of the rotating disc, and a plurality of pin columns are circumferentially distributed on the side wall of the positioning face. A center column is connected to the center of the positioning face in a penetrating mode and is coaxial with a connecting pipe placed on the supporting assembly. A plurality of inner supporting pieces are distributed on the periphery of the center column in the circumferential direction, and it can be ensured that the position of a flange plate is fixed in the welding process through cooperation of the positioning faces and the pin columns; and under the action of the driving assembly, the inner supporting piece not only can effectively support the inner wall of the connecting pipe, but also can generate thrust for the connecting pipe to slide towards the positioning surface, so that the end part of the connecting pipe is tightly propped against the positioning surface. Defects of welding dislocation, pseudo soldering and the like are effectively avoided, and welding quality is improved.

Description

Technical Field

[0001] This invention relates to a welding device for a rear axle flange and a connecting pipe, belonging to the technical field of welding equipment. Background Technology

[0002] In the manufacturing process of the rear axle of electric tricycles, the welding of the rear axle flange and connecting pipe is one of the key steps. Traditional welding methods often use welding equipment with drawbacks such as inaccurate positioning and limited functionality, leading to problems such as inaccurate positioning and unstable welding quality. As a result, the welded rear axle components fail to meet the stability and safety requirements of electric tricycles. Therefore, a welding device for the rear axle flange and connecting pipe is proposed. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a welding device for the rear axle flange and connecting pipe, which welds and positions the rear axle flange and connecting pipe to ensure accurate docking.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a welding device for a rear axle flange and a connecting pipe, comprising: Base plate; The support assembly, mounted on the base plate, is used to support the rear axle connecting pipe; The docking assembly, mounted on the base plate and located at one end of the support assembly, is used for welding and positioning the rear axle flange and the connecting pipe. The welding assembly, located on one side of the base plate, is used for welding the rear axle flange to the connecting pipe; The docking components include: A turntable is rotatably connected to a base plate via a bracket. The turntable has a positioning surface for positioning a flange on the side near the support assembly. Multiple pins are circumferentially distributed on the side wall of the positioning surface. A central column is inserted at the center of the positioning surface, and the central column is coaxial with the connecting pipe placed on the support assembly; Multiple internal support members are circumferentially distributed around the central column and driven by a drive assembly to perform a composite motion with both radial and axial components, so as to simultaneously support the inner wall of the connecting pipe and axially press it toward the positioning surface.

[0005] Preferably, the driving component includes: A push-pull rod, which is slidably connected inside the central column; A connecting block, which is fixed to the end of the push-pull rod; The inner support member has a first push rod and a second push rod rotatably connected to its two ends. The end of the first push rod away from the inner support member is hinged to the connecting block, and the end of the second push rod away from the inner support member is hinged to the side wall of the central column.

[0006] Preferably, the inner support member includes: The first support plate is rotatably connected to the first push rod, and one side of the first support plate is used to abut against the inner wall of the connecting pipe. The second support plate is rotatably connected to the second top rod. The first support plate is provided with a first inclined wall, and the second support plate is provided with a second inclined wall, and the first inclined wall and the second inclined wall are slidably connected.

[0007] Preferably, a rubber gasket for contacting the inner wall of the connecting pipe is fixedly connected to the side wall of the first support plate, and the surface of the rubber gasket has a plurality of resistance-increasing textures evenly distributed.

[0008] Preferably, the second support plate is slidably connected below the first support plate, the first support plate has a first guide rod on its side wall, the second support plate has a guide groove on its side wall, and the first guide rod is slidably connected inside the guide groove. The first guide rod is fitted with a first spring, one end of which abuts against the side wall of the first support plate, and the other end of which abuts against the side wall of the second support plate.

[0009] Preferably, the central column is slidably connected to the turntable, the rear end of the turntable is fixed with a rear cover, and a plurality of second guide rods are distributed inside the rear cover. The rear end of the central column is slidably sleeved on the second guide rods by a second spring.

[0010] Preferably, a second hydraulic cylinder is fixedly connected to the side wall of the rear cover, and the output shaft of the second hydraulic cylinder passes through the rear cover and is connected to the push-pull rod.

[0011] Preferably, a protective cover is fixedly connected to one side of the bracket.

[0012] Preferably, the welding assembly includes a sliding frame, which is slidably connected to the side wall of the base plate via a first hydraulic cylinder, and a welding head is connected to the upper end of the sliding frame.

[0013] Preferably, the support assembly includes a shelf, which is fixedly connected to the upper surface of the base plate. The shelf has a V-shaped placement groove, and multiple omnidirectional rollers for supporting the connecting pipe are distributed on both sides of the placement groove.

[0014] Compared with existing technologies: 1. This invention, through the cooperation of the positioning surface and the pin, ensures that the flange remains fixed in position during welding. Meanwhile, the inner support, under the action of the drive assembly, not only effectively supports the inner wall of the connecting pipe but also generates a thrust that pushes the connecting pipe towards the positioning surface, ensuring that the end of the connecting pipe is tightly pressed against the positioning surface. This dual positioning method greatly improves the accuracy of the welding position between the flange and the connecting pipe, effectively avoiding defects such as welding misalignment and incomplete welding, thereby improving welding quality and ensuring the reliability and stability of the rear axle components.

[0015] 2. This invention utilizes the operation of a second hydraulic cylinder. The extension and retraction of the output shaft drives the push-pull rod to slide within the central column. During this process, the inner support component first presses against the inner wall of the connecting pipe, providing initial support for positioning. As the second hydraulic cylinder continues to operate, the connecting block stops moving relative to the central column. At this point, the central column compresses the second spring and slides on the turntable. The force generated by this sliding further presses the rear axle connecting pipe firmly against the positioning surface. This achieves axial positioning of the rear axle connecting pipe, effectively avoiding welding quality problems caused by inaccurate positioning and further improving welding quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention (with the rear axle flange and connecting pipe in place).

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0018] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0019] Figure 4 This is an exploded cross-sectional view of the bracket and turntable of the present invention.

[0020] Figure 5 This is a cross-sectional view of the turntable, central column, and push-pull rod of the present invention.

[0021] Figure 6 This is a cross-sectional view of the turntable, central column, inner support member, and push-pull rod of the present invention.

[0022] Figure 7 For the present invention Figure 6 Enlarged view of point A.

[0023] Figure 8 This is a cross-sectional view of the inner support member, push-pull rod, connecting block, first top rod, and second top rod of the present invention.

[0024] Figure 9 This is a cross-sectional view of the first and second support plates of the present invention.

[0025] In the picture: 1. Base plate; 101. Bracket; 2. Support components, 201. Shelf, 202. Placement slot, 203. Casters; 3. Interface components; 301, turntable; 3011, positioning surface; 3012, pin; 302, center column; 303, inner support component; 3031, first support plate; 3032, second support plate; 3033, first guide rod; 3034, guide groove; 3035, first spring; 3036, first inclined wall; 3037, second inclined wall; 3038, rubber gasket. 304, drive assembly; 3041, push-pull rod; 3042, connecting block; 3043, first push rod; 3044, second push rod; 4. Welding components, 401. Sliding frame, 402. First hydraulic cylinder, 403. Welding head; 5. Rear cover, 6. Second guide rod, 7. Second spring, 8. Second hydraulic cylinder, 9. Motor, 10. Protective cover. Detailed Implementation

[0026] The present invention is illustrated below with specific embodiments, but these are not intended to limit the invention.

[0027] Example 1 like Figures 1-9 As shown in the figure, in this embodiment, a welding device for a rear axle flange and a connecting pipe is provided, including a base plate 1; the base plate 1 is provided with a support assembly 2 for supporting the rear axle connecting pipe, a docking assembly 3 for welding and positioning the rear axle flange and the connecting pipe, and a welding assembly 4 for welding the rear axle flange and the connecting pipe. The docking component 3 includes a turntable 301, which is rotatably connected to the base plate 1 via a bracket 101. Figures 1-4As shown, bracket 101 is fixed on base plate 1 to support turntable 301. A motor 9 is also mounted on base plate 1, and the output shaft of motor 9 is meshed with turntable 301. When motor 9 starts, it rotates turntable 301. A positioning surface 3011 for positioning a flange is provided on the side of turntable 301 near support assembly 2. Multiple pins 3012 are circumferentially distributed on the side wall of positioning surface 3011. These pins 3012 are matched with the bolt holes of the rear axle flange. When the flange is placed on positioning surface 3011, the pins 3012 are inserted into the bolt holes of the flange, thus positioning it. A central column 302 passes through the center of positioning surface 3011. The central column 302 is coaxial with the connecting pipe placed on support assembly 2. Multiple inner support members 3 are distributed circumferentially around the central column 302. 03. Multiple inner support members 303 are driven by the drive assembly 304 to perform a composite motion with both radial and axial components, so as to simultaneously support the inner wall of the connecting pipe and axially press it toward the positioning surface 3011. Multiple receiving grooves are provided on the side wall of the central column 302. When the central column 302 moves in a converging motion, it can retract into the receiving grooves. When the multiple inner support members 303 spread and slide to support the inner wall of the connecting pipe, that is, when the inner support members 303 expand outward under the action of the drive assembly 304, on the one hand, they can effectively support the inner wall of the connecting pipe. On the other hand, since the direction of their expansion motion has an axial component, through friction with the inner wall of the connecting pipe, they can cause the connecting pipe to slide toward the positioning surface 3011 (that is, the inner support members 303 generate a thrust on the connecting rod to slide toward the positioning surface 3011), and finally make its end abut against the positioning surface 3011.

[0028] A protective cover 10 is fixedly connected to one side of the bracket 101.

[0029] The welding assembly 4 includes a sliding frame 401, which is slidably connected to the side wall of the base plate 1 via a first hydraulic cylinder 402. The first hydraulic cylinder 402 is fixedly installed on the side wall of the base plate 1, and the output shaft of the first hydraulic cylinder 402 is connected to the sliding frame 401. When the first hydraulic cylinder 402 is started, it drives the sliding frame 401 to slide. The upper end of the sliding frame 401 is connected to a welding head 403. When the sliding bracket 401 slides, it drives the welding head 403 to move closer to or further away from the welding position of the rear axle flange and the connecting pipe.

[0030] The support assembly 2 includes a shelf 201, which is fixedly connected to the upper surface of the base plate 1. The shelf 201 has a V-shaped placement groove 202, and multiple universal rollers 203 for supporting the connecting pipe are distributed on both sides of the placement groove 202. The universal rollers 203 support the connecting pipe, which can satisfy both the axial movement and the rotation of the connecting pipe.

[0031] Example 2 like Figures 5-9 As shown, based on Embodiment 1, in order to drive the multiple inner support members 303 to spread or converge in this embodiment, specifically: The drive assembly 304 includes a push-pull rod 3041 and a connecting block 3042. The push-pull rod 3041 is slidably connected inside the central column 302. The connecting block 3042 is fixed to the end of the push-pull rod 3041 and slides inside the central column 302 with the push-pull rod 3041. The inner support member 303 has a first push rod 3043 and a second push rod 3044 rotatably connected to its two ends. The end of the first push rod 3043 away from the inner support member 303 is hinged to the connecting block 3042, and the end of the second push rod 3044 away from the inner support member 303 is hinged to the side wall of the central column 302. When the push-pull rod 3041 pulls the connecting block 3042 to slide, that is, when the connecting block 3042 moves toward the positioning surface 3011, the first push rod 3043 and the second push rod 3044 support the inner support member 303, causing the inner support member 303 to spread and slide to support the movement of the inner wall of the connecting pipe, such as... Figure 6 and Figure 7 As shown, the second push rod 3044 is close to the positioning surface 3011, while the first push rod 3043 is far away from the positioning surface 3011. When the first push rod 3043 and the second push rod 3044 lift the inner support member 303 from the center column 302, the inner support member 303 moves close to the inner wall of the connecting pipe and moves towards the positioning surface 3011. That is, the inner support member 303 moves at an inclination. In this way, when the inner support member 303 supports the inner wall of the connecting pipe, it also generates a thrust on the connecting pipe to slide towards the positioning surface 3011. This ensures that the end of the connecting pipe is against the positioning surface 3011, ensuring the position of the connecting pipe and the flange for welding. When the push-pull rod 3041 pushes the connecting block 3042 to slide, the first push rod 3043 and the second push rod 3044 pull the inner support 303 back into the central column 302, realizing the convergence movement of the inner support 303.

[0032] The inner support member 303 includes a first support plate 3031 and a second support plate 3032. The first support plate 3031 is rotatably connected to the first push rod 3043, and one side of the first support plate 3031 is used to abut against the inner wall of the connecting pipe. The second support plate 3032 is rotatably connected to the second push rod 3044. The first support plate 3031 is provided with a first inclined wall 3036, and the second support plate 3032 is provided with a second inclined wall 3037. The first inclined wall 3036 and the second inclined wall 3037 are slidably connected.

[0033] When the first push rod 3043 and the second push rod 3044 lift the inner support member 303 from the center column 302, the first support plate 3031 presses against the inner wall of the connecting pipe. As the push-pull rod 3041 continues to pull the connecting block 3042, the first push rod 3043 and the second push rod 3044 will continue to apply top pressure to the inner support member 303. At this time, the first support plate 3031 and the second support plate 3032 will move alternately, that is, the first support plate 3031 and the second support plate 3032 will slide relative to each other through the first inclined wall 3036 and the second inclined wall 3037, thereby increasing the pressing force of the first support plate 3031 against the inner wall of the connecting pipe. At the same time, during this process, the first support plate 3031 will also push the connecting pipe toward the positioning surface 3011 to ensure the welding position of the connecting pipe and the flange.

[0034] A rubber gasket 3038 for contacting the inner wall of the connecting pipe is fixedly connected to the side wall of the first support plate 3031. Multiple resistance-increasing textures are evenly distributed on the surface of the rubber gasket 3038.

[0035] The second support plate 3032 is slidably connected below the first support plate 3031. The first support plate 3031 has a first guide rod 3033 on its side wall, and the second support plate 3032 has a guide groove 3034 on its side wall. The first guide rod 3033 is slidably connected inside the guide groove 3034. The sliding direction of the first guide rod 3033 in the guide groove 3034 is parallel to the relative sliding direction of the first inclined wall 3036 and the second inclined wall 3037. The first guide rod 3033 is fitted with a first spring 3035. One end of the first spring 3035 abuts against the side wall of the first support plate 3031, and the other end of the first spring 3035 abuts against the side wall of the second support plate 3032.

[0036] Example 3 like Figure 5 and Figure 6 As shown, based on Embodiment 2, in this embodiment, in order to ensure that the rear axle connecting pipe is pressed tightly against the positioning surface 3011 and to avoid inaccurate axial positioning of the rear axle connecting pipe, the specific steps are as follows: The central column 302 is slidably connected to the turntable 301. The rear end of the turntable 301 is fixed with a rear cover 5. Multiple second guide rods 6 are distributed inside the rear cover 5. The rear end of the central column 302 is slidably sleeved on the second guide rods 6 through a second spring 7.

[0037] A second hydraulic cylinder 8 is fixedly connected to the side wall of the rear cover 5, and the output shaft of the second hydraulic cylinder 8 passes through the rear cover 5 and is connected to the push-pull rod 3041; When the second hydraulic cylinder 8 is running, its output shaft extends and retracts. Since the output shaft is connected to the push-pull rod 3041, it will cause the push-pull rod 3041 to slide within the central column 302. During the sliding process of the push-pull rod 3041, the inner support 303 will first press against the inner wall of the connecting pipe. When the second hydraulic cylinder 8 continues to run, the connecting block 3042 stops moving relative to the central column 302. Subsequently, the central column 302 compresses the second spring 7 and slides on the turntable 301, further pressing the rear axle connecting pipe against the positioning surface 3011, thus preventing inaccurate axial positioning of the rear axle connecting pipe.

[0038] The work process is as follows: Preparation Check whether the motor 9, the first oil cylinder 402 and the second oil cylinder 8 are working properly, and check whether each rotating part is flexible and whether there is any jamming.

[0039] Placement of connecting pipes and flanges Place the rear axle connecting pipe into the V-shaped placement groove 202 of the support assembly 2, so that the connecting pipe contacts the universal roller 203, ensuring that the connecting pipe can move freely in the axial and circumferential directions. Place the rear axle flange on the positioning surface 3011 of the docking assembly 3, so that the pin 3012 on the positioning surface 3011 is inserted into the bolt hole of the flange, achieving the initial positioning of the flange.

[0040] Adjusting the internal support components The second hydraulic cylinder 8 is activated, and its output shaft drives the push-pull rod 3041 to slide within the central column 302. The push-pull rod 3041 pulls the connecting block 3042 toward the positioning surface 3011. The first push rod 3043 and the second push rod 3044 lift the inner support member 303, causing it to slide and support the inner wall of the connecting pipe. Simultaneously, the inner support member 303 generates a thrust on the connecting pipe as it slides toward the positioning surface 3011, ensuring that the end of the connecting pipe is tightly pressed against the positioning surface 3011.

[0041] Welding operation The first hydraulic cylinder 402 is activated, which drives the sliding frame 401 to slide, bringing the welding head 403 closer to the welding position between the rear axle flange and the connecting pipe. During the welding process, the motor 9 is started, which drives the turntable 301 to rotate. At this time, the flange and the connecting pipe rotate synchronously with the turntable 301, thereby completing the circumferential welding at the connection between the flange and the connecting pipe.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A welding device for a rear axle flange and a connecting pipe, characterized in that, include: Base plate (1); Support component (2) is set on base plate (1) and is used to support rear axle connecting pipe; The docking assembly (3) is set on the base plate (1) and located at one end of the support assembly (2) for welding and positioning the rear axle flange and the connecting pipe; Welding assembly (4) is set on one side of the base plate (1) and is used to weld the rear axle flange to the connecting pipe; Among them, the docking component (3) includes: Turntable (301), the turntable (301) is rotatably connected to the base plate (1) via bracket (101), the turntable (301) is provided with a positioning surface (3011) for positioning the flange on the side of the turntable (301) near the support assembly (2), and multiple pins (3012) are circumferentially distributed on the side wall of the positioning surface (3011). A central column (302) is inserted through the center of the positioning surface (3011), and the central column (302) is coaxial with the connecting pipe placed on the support assembly (2); Multiple inner support members (303) are circumferentially distributed around the central column (302) and driven by a drive assembly (304) to perform a composite motion with both radial and axial components, so as to simultaneously support the inner wall of the connecting pipe and axially press it toward the positioning surface (3011).

2. The welding device for a rear axle flange and a connecting pipe according to claim 1, characterized in that, The drive component (304) includes: A push-pull rod (3041) is slidably connected inside the central column (302); A connecting block (3042) is fixed to the end of the push-pull rod (3041); The inner support member (303) is rotatably connected to a first push rod (3043) and a second push rod (3044) at both ends. The end of the first push rod (3043) away from the inner support member (303) is hinged to the connecting block (3042), and the end of the second push rod (3044) away from the inner support member (303) is hinged to the side wall of the central column (302).

3. The welding device for a rear axle flange and a connecting pipe according to claim 2, characterized in that, The inner support member (303) includes: The first support plate (3031) is rotatably connected to the first push rod (3043), and one side of the first support plate (3031) is used to abut against the inner wall of the connecting pipe. The second support plate (3032) is rotatably connected to the second top rod (3044); The first support plate (3031) is provided with a first inclined wall (3036), and the second support plate (3032) is provided with a second inclined wall (3037). The first inclined wall (3036) and the second inclined wall (3037) are slidably connected.

4. The welding device for a rear axle flange and a connecting pipe according to claim 3, characterized in that, A rubber gasket (3038) for contacting the inner wall of the connecting pipe is fixedly connected to the side wall of the first support plate (3031). The surface of the rubber gasket (3038) is evenly distributed with multiple resistance-increasing textures.

5. The welding device for a rear axle flange and a connecting pipe according to claim 3, characterized in that, The second support plate (3032) is slidably connected below the first support plate (3031). The first support plate (3031) has a first guide rod (3033) on its side wall, and the second support plate (3032) has a guide groove (3034) on its side wall. The first guide rod (3033) is slidably connected inside the guide groove (3034). The first guide rod (3033) is fitted with a first spring (3035), one end of the first spring (3035) abuts against the side wall of the first support plate (3031), and the other end of the first spring (3035) abuts against the side wall of the second support plate (3032).

6. The welding device for a rear axle flange and a connecting pipe according to claim 2, characterized in that, The central column (302) is slidably connected to the turntable (301). The rear end of the turntable (301) is fixed with a rear cover (5). Multiple second guide rods (6) are distributed inside the rear cover (5). The rear end of the central column (302) is slidably sleeved on the second guide rods (6) by a second spring (7).

7. The welding device for a rear axle flange and a connecting pipe according to claim 6, characterized in that, A second oil cylinder (8) is fixedly connected to the side wall of the rear cover (5), and the output shaft of the second oil cylinder (8) passes through the rear cover (5) and is connected to the push-pull rod (3041).

8. The welding device for a rear axle flange and a connecting pipe according to claim 7, characterized in that, A protective cover (10) is fixedly connected to one side of the bracket (101).

9. The welding device for a rear axle flange and a connecting pipe according to claim 1, characterized in that, The welding assembly (4) includes a sliding frame (401), which is slidably connected to the side wall of the base plate (1) via a first oil cylinder (402), and a welding head (403) is connected to the upper end of the sliding frame (401).

10. The welding device for a rear axle flange and a connecting pipe according to claim 1, characterized in that, The support assembly (2) includes a shelf (201) which is fixedly connected to the upper surface of the base plate (1). The shelf (201) has a V-shaped placement groove (202) and multiple universal rollers (203) for supporting the connecting pipe are distributed on both sides of the placement groove (202).

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