Welding equipment for transmission shaft assembly

Abstract

The invention relates to the technical field of welding, and discloses a transmission shaft assembly welding device which comprises a transmission shaft assembly supporting mechanism, and a transmission shaft assembly welding mechanism is fixedly installed on the upper end face of the transmission shaft assembly supporting mechanism. The transmission shaft assembly welding mechanism comprises a gantry mounting frame, a welding machine is fixedly mounted on the upper end face of the gantry mounting frame, a welding gun is connected to the lower portion of the welding machine through a cable, the welding gun is detachably inserted into the mounting frame, and the mounting frame is fixedly mounted at the top end of the inner side of the gantry mounting frame. The transmission shaft assembly supporting mechanism comprises a welding table, and the welding table is fixedly installed between the bottoms of the gantry installation frames. The welding equipment has a positioning function, can be used for welding a plurality of transmission shaft assemblies at the same time, and is better in welding applicability.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to welding equipment for a transmission shaft assembly. Background Art

[0002] The drive shaft is a high-speed, low-support rotating body, so its dynamic balance is crucial. Generally, the drive shaft must undergo a dynamic balance test before leaving the factory and be adjusted on a balancing machine. For front-engine, rear-wheel drive vehicles, it is the shaft that transmits the rotation of the transmission to the main reducer. It can be made of several sections, and the sections can be connected by universal joints. In the production of drive shaft assemblies, welding is an indispensable process. With the continuous improvement of drive shaft assembly manufacturing technology, the process requirements for welding are also improved; with the continuous upgrading of technology, more and more places use robot welding, which can greatly improve welding efficiency and welding quality.

[0003] During welding, the transmission shaft assembly to be welded needs to be reliably clamped to prevent relative displacement of the transmission shaft assembly during welding. However, existing transmission shaft assembly welding equipment has the following problems: most of them can only fix two transmission shaft assemblies, and are thus not suitable for simultaneous welding of more than two parts, and have poor applicability. Therefore, a transmission shaft assembly welding equipment is proposed. Summary of the invention

[0004] The invention provides a transmission shaft assembly welding device, which solves the problems in the background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A transmission shaft assembly welding device comprises a transmission shaft assembly support mechanism, wherein a transmission shaft assembly welding mechanism is fixedly mounted on the upper end surface of the transmission shaft assembly support mechanism;

[0007] The transmission shaft assembly welding mechanism includes a gantry mounting frame, a welding machine is fixedly mounted on the upper end surface of the gantry mounting frame, a welding gun is connected to the lower side of the welding machine through a cable, the welding gun is detachably inserted into the mounting frame, and the mounting frame is fixedly mounted on the inner top of the gantry mounting frame;

[0008] The transmission shaft assembly support mechanism includes a welding table, which is fixedly installed between the bottom of the gantry mounting frame. A cross-shaped driving groove is opened on the upper end surface of the welding table, and a positioning component is installed in the cross-shaped driving groove.

[0009] Preferably, the positioning assembly includes a drive motor, which is fixedly installed in the middle of the lower end surface of the welding table. The upper end of the drive motor output shaft passes through the lower end of the welding table and extends to the inside of the cross-shaped drive groove. It is mechanically linked to four threaded rods through a drive box, and the other end of the threaded rod is rotatably connected to the inner wall of the cross-shaped drive groove. Positioning modules are installed on the four threaded rods.

[0010] Preferably, the drive box is fixedly installed in the middle position of the cross-shaped drive slot, and the upper end of the drive motor output shaft passes through the lower end of the welding table and the lower end of the drive box in sequence, extends to the interior of the drive box, and is mechanically linked with the four threaded rods.

[0011] Preferably, a first bevel gear is fixedly mounted on the upper end of the output shaft of the driving motor, and a second bevel gear is fixedly mounted on one end of four threaded rods close to each other. The four second bevel gears are respectively meshed with the front, rear, left and right ends of the first bevel gear, and the other end of the threaded rod passes through the driving box.

[0012] Preferably, a supporting side block is rotatably mounted on the threaded rod, and the supporting side block is fixedly mounted at the bottom end of the inner part of the cross-shaped driving groove.

[0013] Preferably, the positioning module includes a rectangular nut block, which is threaded on the threaded rod, the upper end of the rectangular nut block passes through the cross-shaped drive groove and extends above the cross-shaped drive groove, a positioning support block is installed on the upper end surface of the rectangular nut block, a positioning ring is fixedly installed on the upper end surface of the positioning support block, a vertical positioning screw is threaded through the upper end of the positioning ring along the vertical direction, and a positioning head is rotatably installed on the lower end of the vertical positioning screw and located on the inner side of the positioning ring.

[0014] The bottom end of the vertical positioning screw has a threaded section, the top end of the positioning head is provided with a threaded hole of a blind hole structure, the threaded section is screwed into the threaded hole, and an adaptive component is provided in the threaded hole;

[0015] The adaptive component includes a sleeve and a spring. The sleeve is placed in the threaded hole. The sleeve includes an outer sleeve and an inner sleeve that are connected to each other. The bottom end of the inner sleeve is connected to the bottom of the threaded hole. A return spring is sleeved on the outside of the inner sleeve. The bottom end of the return spring is connected to the bottom of the threaded hole. The top end of the return spring is connected to the bottom end of the outer sleeve. The top end of the outer sleeve is higher than the top end of the inner sleeve, and the top end of the outer sleeve is spaced from the bottom end of the threaded section. The spring is placed in the inner sleeve, and the top end of the spring fits the bottom end of the threaded section. The positioning head includes a connected base and a movable part. The threaded section is screwed to the base, and the movable part is slidably connected to the bottom of the base.

[0016] A limiting plate is arranged on the top of the positioning head, a through hole is arranged in the middle of the limiting plate, and the vertical positioning screw passes through the through hole; a protrusion is arranged on the inner wall of the through hole, and a long strip of limiting groove is arranged vertically on the side of the vertical positioning screw, and the protrusion is placed in the limiting groove; a limiting block is arranged at the bottom end of the limiting plate, and a plurality of grooves are arranged on the top of the positioning head, and the plurality of grooves are distributed along the ring interval.

[0017] Preferably, the side end surface of the rectangular nut block is slidably fitted with the inner wall of the cross-shaped driving groove.

[0018] Preferably, a trapezoidal installation slot is provided at the upper end of the rectangular nut block, a trapezoidal installation slide block is installed in the trapezoidal installation slot, and the upper end surface of the trapezoidal installation slide block is fixedly connected to the lower end of the positioning support block.

[0019] Preferably, a positioning block is fixedly mounted on the side end surface of the trapezoidal mounting slide block, and the positioning block is detachably fixedly connected to the trapezoidal mounting slide groove via a positioning top screw.

[0020] Preferably, four supporting legs are fixedly installed in a rectangular array at the lower end of the welding platform, and rubber shock-absorbing pads are wrapped at the lower ends of the four supporting legs.

[0021] The beneficial effect of the present invention is that the welding equipment of the transmission shaft assembly can place multiple transmission shaft assemblies to be welded in multiple positioning rings respectively, and place the welding end close to the side of the drive box, and then twist the vertical positioning screw to drive the positioning head to move downward, and the positioning head that moves downward can fix the transmission shaft assembly on the positioning support block, and then start the driving motor. The driving motor can drive the multiple rectangular nut blocks to move toward the drive box through the first bevel gear and the second bevel gear, and then the transmission shaft assembly can be moved toward the drive box. After moving to a suitable position, , the position of the transmission shaft assembly can be fine-tuned by loosening the positioning top screw and sliding the trapezoidal mounting slider in the trapezoidal mounting groove. When the welding ends of multiple transmission shaft assemblies are in contact with each other, the positioning top screw can be tightened to fix the transmission shaft assembly. Then, the multiple transmission shafts can be welded by a welding gun. During welding, the welding gun can be pulled out from the mounting frame from bottom to top, and then the welding machine can be started. The transmission shaft assembly can be automatically welded by the welding gun. The present invention can weld two, three or four transmission shaft assemblies at the same time according to needs, and the welding efficiency is higher.

[0022] The present invention has a positioning function and can realize simultaneous welding of multiple transmission shaft assemblies, thus having better welding applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic structural diagram of a welding device for a transmission shaft assembly.

[0024] Figure 2The present invention provides a schematic structural diagram of a transmission shaft assembly welding mechanism in a transmission shaft assembly welding device.

[0025] Figure 3 The present invention provides a schematic structural diagram of a transmission shaft assembly support mechanism in a transmission shaft assembly welding device.

[0026] Figure 4 The present invention is a schematic structural diagram of a positioning component in a welding device for a transmission shaft assembly.

[0027] Figure 5 A bottom view of the partial structure of a welding device for a transmission shaft assembly proposed by the present invention.

[0028] Figure 6 The present invention is a schematic structural diagram of a positioning module in a welding device for a transmission shaft assembly.

[0029] Figure 7 An exploded view of a positioning module in a welding device for a transmission shaft assembly proposed by the present invention.

[0030] Figure 8 This is a partial cross-sectional structural schematic diagram of the connection between the positioning head and the vertical positioning screw in the welding equipment of the transmission shaft assembly proposed by the present invention, and the movable part is in a lower position at this time.

[0031] Fig. 9 This is a partial cross-sectional structural schematic diagram of the connection between the positioning head and the vertical positioning screw in the welding equipment of the transmission shaft assembly proposed by the present invention. At this time, the movable part is in the middle position, and the top end of the outer cylinder is in contact with the threaded section.

[0032] Fig.10 This is a partial cross-sectional structural schematic diagram of the connection between the positioning head and the vertical positioning screw in the welding equipment of the transmission shaft assembly proposed by the present invention. At this time, the movable part is in the middle position, and the top end of the inner tube is in contact with the threaded section.

[0033] Numbers in the figure: 1, transmission shaft assembly welding mechanism, 2, transmission shaft assembly supporting mechanism;

[0034] 101 gantry mounting frame, 102 welding machine, 103 mounting frame, 104 welding gun;

[0035] 201 welding table, 202 cross-shaped driving groove, 203 positioning assembly;

[0036] 2031 driving motor, 2032 supporting side block, 2033 positioning module, 2034 threaded rod, 2035 driving box, 2036 first bevel gear, 2037 second bevel gear;

[0037] 20331 positioning ring, 20332 vertical positioning screw, 20333 positioning head, 20334 positioning support block, 20335 positioning block, 20336 trapezoidal mounting slide groove, 20337 trapezoidal mounting slide block, 20338 positioning top screw, 20339 rectangular nut block;

[0038] 301 threaded section, 302 threaded hole, 303 adaptive component, 304 sleeve, 305 spring, 306 outer cylinder, 307 inner cylinder, 308 return spring, 309 limit plate, 310 perforation, 311 protrusion, 312 limit groove, 313 limit block, 314 groove, 315 base, 316 movable part. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Reference Figure 1-3 , a transmission shaft assembly welding device, comprising a transmission shaft assembly supporting mechanism 2, a transmission shaft assembly welding mechanism 1 is fixedly mounted on the upper end surface of the transmission shaft assembly supporting mechanism 2;

[0041] The transmission shaft assembly welding mechanism 1 can be used to weld the transmission shaft assembly, and the transmission shaft assembly supporting mechanism 2 can be used to support and position the transmission shaft assembly to be welded.

[0042] The transmission shaft assembly welding mechanism 1 includes a gantry mounting frame 101, a welding machine 102 is fixedly mounted on the upper end surface of the gantry mounting frame 101, a welding gun 104 is connected to the lower side of the welding machine 102 through a cable, and the welding gun 104 is detachably inserted on the mounting frame 103, and the mounting frame 103 is fixedly mounted on the inner top of the gantry mounting frame 101;

[0043] During welding, the welding gun 104 can be pulled out from the mounting frame 103 from bottom to top, and then the welding machine 102 can be started, and the transmission shaft assembly can be automatically welded by the welding gun 104 .

[0044] The transmission shaft assembly support mechanism 2 includes a welding table 201, which is fixedly installed between the bottom of the gantry mounting frame 101. A cross-shaped driving groove 202 is provided on the upper end surface of the welding table 201, and a positioning assembly 203 is installed in the cross-shaped driving groove 202. Four supporting legs are fixedly installed in a rectangular array at the lower end of the welding table 201, and rubber shock-absorbing pads are wrapped at the lower ends of the four supporting legs. By providing the rubber shock-absorbing pads, the shock-absorbing effect of the present invention during operation can be improved, thereby improving the stability of the present invention.

[0045] In this embodiment, refer to Figure 3-5The positioning assembly 203 includes a driving motor 2031, which is fixedly installed in the middle of the lower end surface of the welding table 201. The upper end of the output shaft of the driving motor 2031 passes through the lower end of the welding table 201 and extends to the inside of the cross-shaped driving groove 202. It is mechanically linked with four threaded rods 2034 through a driving box 2035. The other end of the threaded rod 2034 is rotatably connected to the inner wall of the cross-shaped driving groove 202. Positioning modules 2033 are installed on the four threaded rods 2034.

[0046] The transmission shaft assembly can be positioned by the positioning module 2033 .

[0047] The drive box 2035 is fixedly installed in the middle position of the cross-shaped drive slot 202. The upper end of the output shaft of the drive motor 2031 passes through the lower end of the welding table 201 and the lower end of the drive box 2035 in sequence, and extends to the interior of the drive box 2035, and is mechanically linked with the four threaded rods 2034.

[0048] A first bevel gear 2036 is fixedly mounted on the upper end of the output shaft of the driving motor 2031, and a second bevel gear 2037 is fixedly mounted on one end of four threaded rods 2034 close to each other. The four second bevel gears 2037 are respectively meshed with the front, back, left and right ends of the first bevel gear 2036, and the other end of the threaded rod 2034 passes through the driving box 2035.

[0049] By starting the drive motor 2031, the drive motor 2031 can drive the first bevel gear 2036 to rotate, the rotating first bevel gear 2036 can drive the second bevel gear 2037 to rotate, and the rotating second bevel gear 2037 can drive the threaded rod 2034 to rotate, thereby realizing the linkage between the output shaft of the drive motor 2031 and the four threaded rods 2034, thereby improving the automation effect of the present invention.

[0050] A supporting side block 2032 is rotatably mounted on the threaded rod 2034 , and the supporting side block 2032 is fixedly installed at the bottom end of the inner part of the cross-shaped driving groove 202 .

[0051] The stability of the rotational installation of the threaded rod 2034 can be further improved by supporting the side block 2032.

[0052] Reference Figure 5-7The positioning module 2033 includes a rectangular nut block 20339, which is threadedly mounted on the threaded rod 2034. The upper end of the rectangular nut block 20339 passes through the cross-shaped driving groove 202 and extends above the cross-shaped driving groove 202. A positioning support block 20334 is installed on the upper end surface of the rectangular nut block 20339. A positioning ring 20331 is fixedly installed on the upper end surface of the positioning support block 20334. A vertical positioning screw 20332 is threadedly penetrated along the vertical direction at the upper end of the positioning ring 20331. A positioning head 20333 is rotatably installed at the lower end of the vertical positioning screw 20332 and located on the inner side of the positioning ring 20331.

[0053] The side end surface of the rectangular nut block 20339 is slidably fitted with the inner wall of the cross-shaped driving groove 202.

[0054] Through the above design, when the threaded rod 2034 rotates, the rectangular nut block 20339 can be driven stably toward the drive box 2035, thereby facilitating automatic contact of the welding end of the transmission shaft assembly, thereby facilitating welding of the transmission shaft assembly.

[0055] A trapezoidal mounting slot 20336 is provided at the upper end of the rectangular nut block 20339, a trapezoidal mounting slide block 20337 is installed in the trapezoidal mounting slot 20336, and the upper end surface of the trapezoidal mounting slide block 20337 is fixedly connected to the lower end of the positioning support block 20334. The inner wall of the trapezoidal mounting slot 20336 is a slope structure, so that the trapezoidal mounting slide block 20337 will not fall off from it.

[0056] A positioning block 20335 is fixedly installed on the side end surface of the trapezoidal mounting sliding block 20337, and the positioning block 20335 is detachably fixedly connected to the trapezoidal mounting sliding groove 20336 through a positioning top screw 20338.

[0057] The bottom end of the vertical positioning screw 20332 has a threaded section 301, and the top end of the positioning head 20333 is provided with a threaded hole 302 of a blind hole structure. The threaded section 301 is screwed to the threaded hole 302, and an adaptive component 303 is provided in the threaded hole 302. The threaded connection between the threaded section and the threaded hole forms a connection between the positioning head 20333 and the vertical positioning screw 20332, and the positioning head 20333 can be screwed to adjust its height in actual use to adjust the preload force of the spring 305. The positioning head 20333 includes a connected base 315 and a movable part 316, the threaded section 301 is screwed to the base 315, and the movable part 316 is slidably connected to the bottom of the base 315;

[0058] The adaptive component 303 includes a sleeve 304 and a spring 305. The sleeve 304 is placed in the threaded hole 302. The sleeve 304 includes an outer cylinder 306 and an inner cylinder 307 that are connected to each other. The bottom end of the inner cylinder 307 is connected to the bottom of the threaded hole 302. A return spring 308 is sleeved on the outside of the inner cylinder 307. The bottom end of the return spring 308 is connected to the bottom of the threaded hole 302. The top of the return spring 308 is connected to the bottom end of the outer cylinder 306. The top of the outer cylinder 306 is higher than the top of the inner cylinder 307, and the top of the outer cylinder 306 is spaced from the bottom end of the threaded segment 301. The spring 305 is placed in the inner cylinder 307, and the top of the spring 305 is fitted to the bottom end of the threaded segment 301.

[0059] When tightening the drive shaft, rotating the vertical positioning screw 20332 can move the positioning head 20333 downward and contact the drive shaft. Continuing to rotate the vertical positioning screw 20332 can compress the spring 305, causing it to exert a greater force on the drive shaft. During this process, the staff's hands can obtain the force fed back by the components, so that they know the size of the applied force and can judge the size of the preload force based on experience to find the best balance between tightening the drive shaft and protecting the drive shaft.

[0060] like Figure 8-10 As shown, the base 315 and the movable part 316 are two parts connected to the positioning head 20333. A limiting column is provided at the bottom of the base 315, and a limiting hole is provided at the top of the movable part 316. The limiting column is connected to the limiting hole. When the transmission shaft is fixed, the bottom end of the movable part 316 is in contact with the surface of the transmission shaft. After the force is continuously applied, the transmission shaft applies a reaction force to the movable part 316, so that the movable part 316 slides upward relative to the base 315, compresses the spring 305, and reduces the distance between the base 315 and the movable part 316.

[0061] like Fig. 9 As shown, before clamping the transmission shaft, the entire positioning head 20333 can be screwed to move the positioning head 20333 upward relative to the threaded section 301, so that the spring 305 is compressed to a greater extent. The maximum adjustment range of this degree is: when the top end of the outer cylinder 306 fits with the bottom end of the threaded section 301, the return spring 308 also starts to generate a force. At this time, the staff can sense it through force feedback and stop screwing the positioning head 20333. In this case, when the transmission shaft is clamped, as shown in FIG. Fig.10As shown, the movable part 316 can be further moved upward so that the top end of the inner cylinder 307 fits with the bottom end of the threaded segment 301. At this time, the threaded segment 301 and the movable part 316 are blocked by the rigid inner cylinder 307, so that the distance between the two cannot be further compressed. At this time, the staff can know through the force feedback that no further clamping force will be applied, which plays a role in protecting the transmission shaft and protecting the various working parts.

[0062] Through the setting of the adaptive component 303, when the transmission shaft is connected, each component can automatically adjust its position to fix the transmission shaft without damaging the transmission shaft, and it has a manual adjustment function. Before use, the adaptive component 303 can be manually adjusted according to the size and shape of the transmission shaft to better adapt to different transmission shafts. It also has a rigid limit component, which can rigidly tighten the transmission shaft while being elastically adaptive, with diverse functions and better use effects.

[0063] A limiting plate 309 is arranged on the top of the positioning head 20333, a through hole 310 is arranged in the middle of the limiting plate 309, and the vertical positioning screw 20332 passes through the through hole 310; a protrusion 311 is arranged on the inner wall of the through hole 310, and a long strip of limiting groove 312 is arranged vertically on the side of the vertical positioning screw 20332, and the protrusion 311 is placed in the limiting groove 312; a limiting block 313 is arranged at the bottom end of the limiting plate 309, and a plurality of grooves 314 are arranged on the top of the positioning head 20333, and the plurality of grooves 314 are distributed along the ring interval.

[0064] Through the design of the limiting piece 309 or other structures, when the limiting piece 309 is connected to the base 315, the positioning head 20333 cannot be screwed, which plays a role in protecting the components and stabilizing the operation.

[0065] The bottom end of the limiting piece 309 has a magnetic piece, and the top end of the positioning head 20333 has a suction piece, so that the two can be attracted to each other to ensure the stability of the limiting piece 309. When the limiting piece 309 moves upward, the limiting block 313 is separated from the groove 314, and the positioning head 20333 can be rotated. The limiting piece 309 is connected to the vertical positioning screw 20332 through the mutually limiting protrusion 311 and the limiting groove 312, so that there is no rotation between the two. And the limiting groove 312 is a long strip structure, so that the limiting piece 309 has space to move upward.

[0066] The multiple transmission shaft assemblies that need to be welded can be placed in multiple positioning rings 20331 respectively, and the welding ends are placed close to the side of the drive box 2035. Then, the vertical positioning screw 20332 is twisted to drive the positioning head 20333 to move downward. The downward positioning head 20333 can fix the transmission shaft assembly on the positioning support block 20334. Then, the drive motor 2031 is started. The drive motor 2031 can drive the multiple rectangular nut blocks 20339 to move toward the drive box 2035 through the first bevel gear 2036 and the second bevel gear 2037, so that the transmission shaft assembly can be welded. Move in the direction of the drive box 2035. After moving to a suitable position, the position of the transmission shaft assembly can be fine-tuned by loosening the positioning top screw 20338 and sliding the trapezoidal mounting slider 20337 in the trapezoidal mounting groove 20336. When the welding ends of multiple transmission shaft assemblies are in contact with each other, the positioning top screw 20338 can be tightened to fix the transmission shaft assembly. Then, the welding gun 104 can be used to weld multiple transmission shafts. The present invention can weld multiple transmission shaft assemblies at the same time according to needs, with higher welding efficiency, and can also weld transmission shaft assemblies of different shapes and structures.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0069] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding device for a transmission shaft assembly, characterized in that: It comprises a transmission shaft assembly support mechanism (2), and a transmission shaft assembly welding mechanism (1) is fixedly mounted on the upper end surface of the transmission shaft assembly support mechanism (2); The transmission shaft assembly welding mechanism (1) comprises a gantry mounting frame (101), a welding machine (102) is fixedly mounted on the upper end surface of the gantry mounting frame (101), a welding gun (104) is connected to the lower side of the welding machine (102) via a cable, the welding gun (104) is detachably inserted into the mounting frame (103), and the mounting frame (103) is fixedly mounted on the inner top end of the gantry mounting frame (101); The transmission shaft assembly support mechanism (2) comprises a welding platform (201), wherein the welding platform (201) is fixedly mounted between the bottom of the gantry mounting frame (101), a cross-shaped driving groove (202) is formed on the upper end surface of the welding platform (201), and a positioning assembly (203) is installed in the cross-shaped driving groove (202).

2. The welding equipment for a transmission shaft assembly according to claim 1, characterized in that: The positioning assembly (203) comprises a driving motor (2031), wherein the driving motor (2031) is fixedly mounted at the middle position of the lower end surface of the welding table (201), wherein the upper end of the output shaft of the driving motor (2031) passes through the lower end of the welding table (201) and extends into the interior of the cross-shaped driving groove (202), and is mechanically linked to four threaded rods (2034) through a driving box (2035), wherein the other end of the threaded rod (2034) is rotatably connected to the inner wall of the cross-shaped driving groove (202), and a positioning module (2033) is mounted on each of the four threaded rods (2034).

3. The welding equipment for a transmission shaft assembly according to claim 2, characterized in that: The drive box (2035) is fixedly installed in the middle of the cross-shaped drive slot (202), and the upper end of the output shaft of the drive motor (2031) passes through the lower end of the welding table (201) and the lower end of the drive box (2035) in sequence, and extends to the interior of the drive box (2035), and is mechanically linked with the four threaded rods (2034).

4. The welding equipment for a transmission shaft assembly according to claim 3, characterized in that: A first bevel gear (2036) is fixedly mounted on the upper end of the output shaft of the driving motor (2031); a second bevel gear (2037) is fixedly mounted on one end of four threaded rods (2034) close to each other; the four second bevel gears (2037) are respectively meshed with the front, rear, left and right ends of the first bevel gear (2036); and the other end of the threaded rod (2034) passes through the driving box (2035).

5. The welding equipment for a transmission shaft assembly according to claim 4, characterized in that: A supporting side block (2032) is rotatably mounted on the threaded rod (2034), and the supporting side block (2032) is fixedly mounted on the bottom end inside the cross-shaped driving groove (202).

6. The welding equipment for a transmission shaft assembly according to claim 5, characterized in that: The positioning module (2033) comprises a rectangular nut block (20339), wherein the rectangular nut block (20339) is threadedly mounted on the threaded rod (2034), wherein the upper end of the rectangular nut block (20339) penetrates the cross-shaped driving groove (202) and extends above the cross-shaped driving groove (202), wherein a positioning support block (20334) is installed on the upper end surface of the rectangular nut block (20339), wherein a positioning ring (20331) is fixedly installed on the upper end surface of the positioning support block (20334), wherein a vertical positioning screw rod (20332) is threadedly penetrated along a vertical direction at the upper end of the positioning ring (20331), and a positioning head (20333) is rotatably installed at the lower end of the vertical positioning screw rod (20332) and located inside the positioning ring (20331).

7. The welding equipment for a transmission shaft assembly according to claim 6, characterized in that: The bottom end of the vertical positioning screw (20332) has a threaded section (301), the top end of the positioning head (20333) is provided with a threaded hole (302) of a blind hole structure, the threaded section (301) is screwed into the threaded hole (302), and an adaptive component (303) is provided in the threaded hole (302); The adaptive component (303) includes a sleeve (304) and a spring (305). The sleeve (304) is disposed in the threaded hole (302). The sleeve (304) includes an outer cylinder (306) and an inner cylinder (307) that are connected to each other. The bottom end of the inner cylinder (307) is connected to the bottom of the threaded hole (302). A return spring (308) is sleeved on the outside of the inner cylinder (307). The bottom end of the return spring (308) is connected to the bottom of the threaded hole (302). The top end of the return spring (308) is connected to the bottom end of the outer cylinder (306). The top of the outer cylinder (306) is higher than the top of the inner cylinder (307), and the top of the outer cylinder (306) is spaced from the bottom of the threaded section (301); the spring (305) is placed in the inner cylinder (307), and the top of the spring (305) is attached to the bottom of the threaded section (301); the positioning head (20333) includes a connected base (315) and a movable part (316), the threaded section (301) is threadedly connected to the base (315), and the movable part (316) is slidably connected to the bottom of the base (315); A limiting plate (309) is arranged at the top of the positioning head (20333), a through hole (310) is arranged in the middle of the limiting plate (309), and the vertical positioning screw (20332) passes through the through hole (310); a protrusion (311) is arranged on the inner wall of the through hole (310), and a long strip-shaped limiting groove (312) is arranged vertically on the side of the vertical positioning screw (20332), and the protrusion (311) is placed in the limiting groove (312); a limiting block (313) is arranged at the bottom end of the limiting plate (309), and a plurality of grooves (314) are arranged at the top of the positioning head (20333), and the plurality of grooves (314) are distributed along a ring-shaped interval.

8. The welding equipment for a transmission shaft assembly according to claim 7, characterized in that: The side end face of the rectangular nut block (20339) is slidably fitted with the inner wall of the cross-shaped driving groove (202); a trapezoidal mounting groove (20336) is provided at the upper end of the rectangular nut block (20339); a trapezoidal mounting slide block (20337) is installed in the trapezoidal mounting groove (20336); and the upper end face of the trapezoidal mounting slide block (20337) is fixedly connected to the lower end of the positioning support block (20334).

9. The welding equipment for a transmission shaft assembly according to claim 8, characterized in that: A positioning block (20335) is fixedly mounted on the side end surface of the trapezoidal mounting sliding block (20337), and the positioning block (20335) is detachably fixedly connected to the trapezoidal mounting sliding groove (20336) via a positioning top screw (20338).

10. The welding equipment for a transmission shaft assembly according to claim 9, characterized in that: The lower end of the welding platform (201) is fixedly provided with four supporting legs in a rectangular array, and the lower ends of the four supporting legs are all wrapped with rubber shock-absorbing pads.

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