Automobile wheel hub spot welding device

Abstract

The application discloses a kind of automobile wheel hub spot welding processing devices, belong to welding processing field, including base, spot welder, bottom plate, top plate, outer ring, inner table, rotary table and limit rod, the spot welder is located in base side, the bottom plate sliding is located in the upper of base, the top plate is located in the upper of bottom plate, the top plate includes upper layer board, the upper layer board middle part is penetrated and is equipped with circular groove one, the outer ring is rotatably arranged in circular groove one, the outer ring is interference fit with circular groove one, the inner table is rotatably arranged in the inner side of outer ring, the inner table includes circular table one, the circular table one top is equipped with circular groove two, the rotary table is rotatably arranged in circular groove two, the limit rod is clamped and arranged in the upper of inner table.The application can be fixed wheel hub, reduce the risk of falling during processing, prevent damage equipment or operator, while can accurately adjust wheel hub according to weld distribution, make spot welding processing more accurate, and can adapt to a variety of sizes, a variety of weld distribution situation wheel hub processing.

Description

Technical Field

[0001] This invention belongs to the field of welding processing technology, specifically referring to a spot welding processing device for automobile wheel hubs. Background Technology

[0002] In the wheel manufacturing process, the pre-processing stage of the wheel hub involves connecting different components or materials through spot welding. This process lays the foundation for subsequent processing steps. A wheel hub is usually composed of multiple components, such as the hub center and the rim. Spot welding is used to weld these components into a complete wheel hub. This process requires connecting different metal sheets or components together through spot welding. The welding points of the wheel hub are usually distributed in a circumferential array. Existing wheel hub spot welding processes usually involve manual rotation adjustment or placing the wheel hub on a platform. A drive device drives the platform and adjusts the wheel hub rotation through friction, rotating the welding points to below the spot welding machine. The spot welding machine applies high voltage, causing current to pass through the two components for instantaneous heating, thereby melting the metal components and connecting them together. Traditional adjustment methods cannot effectively fix the wheel hub. At the same time, the welding points of the wheel hub are usually distributed in a circumferential array, and the distribution of the welding points is also different. Traditional adjustment methods cannot be adjusted according to different wheel hubs, which can easily cause deviations in the welding points and pose certain risks. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides an automotive wheel hub spot welding processing device that can be flexibly adjusted according to different wheel hubs and accurately locate the welding points.

[0004] The technical solution adopted by the present invention is as follows: The present invention provides an automobile wheel hub spot welding processing device, including a base, a spot welding machine, a bottom plate, a top plate, an outer ring, an inner platform, a turntable, and a limiting rod. The spot welding machine is located on the side of the base, the bottom plate is slidably located above the base, the top plate is located above the bottom plate, the top plate includes an upper plate, a circular groove is provided through the middle of the upper plate, the outer ring is rotatably located in the circular groove, the outer ring and the circular groove are interference fit, the inner platform is rotatably located inside the outer ring, the inner platform includes a frustum, the top of the frustum has a circular groove, the turntable is rotatably located in the circular groove, and the limiting rod is locked above the inner platform.

[0005] Furthermore, the top wall of the base is provided with a sliding groove, and an electric screw is provided in the sliding groove. The base plate includes a lower plate, and a slider is provided at the bottom of the lower plate. A screw hole is provided through the slider. The slider is slidably disposed in the sliding groove. The slider and the sliding groove are in close contact with each other. The screw hole is threadedly engaged with the electric screw.

[0006] Furthermore, the spot welding machine includes an upper welding head and a lower welding head, with the upper welding head positioned directly above the lower welding head.

[0007] Furthermore, the top wall of the outer ring is provided with an annular groove two.

[0008] Furthermore, the top wall of the truncated cone is provided with a one-way locking strip that can rebound after the pressing pressure is removed. The top wall of the one-way locking strip is inclined. A trigger rod is provided on one side wall of the truncated cone and is located below the top plate. A motor is provided on the bottom wall of the truncated cone. In the initial state, the line connecting the trigger rod and the axis of the truncated cone is set at 180° with the line connecting the spot welding machine and the axis of the truncated cone.

[0009] Furthermore, the bottom wall of the upper plate has an annular groove, and the annular groove contains multiple positioning grooves distributed along an arc. A positioning slider is slidably engaged in the annular groove. The distribution of the positioning grooves follows the principle that the angle of the trigger rod rotating from the initial state to directly below each positioning groove increases progressively, and the angle of the trigger rod rotating from the initial state to directly below each positioning groove is equal to the included angle between each spoke in a common hub with different spoke counts.

[0010] Furthermore, the turntable includes a second frustum, an electric telescopic rod, and a retractable cover. The second frustum is rotatably disposed within a second circular groove. The electric telescopic rod is disposed on the top of the second frustum, and the retractable cover is disposed on the top of the electric telescopic rod. The retractable cover is a hollow frustum with an open bottom. An adjustment groove is provided on the top of the second frustum. The adjustment grooves are arranged in a circumferential array and distributed in multiple layers. The number of adjustment grooves in each layer of the circumferential array increases from the inside to the outside.

[0011] Furthermore, the limiting rod includes a rod body, with an insert rod at the bottom of the rod body, the insert rod being inserted into an annular groove two. A sliding groove two is formed on the top wall of the rod body, and a sliding rod is slidably engaged within the sliding groove two. A through hole is formed at the end of the sliding groove two away from the axis of the frustum two. An adjusting screw is rotatably provided at the end of the sliding rod near the through hole, the end of the adjusting screw passing through the through hole. Springs are provided at the end of the sliding groove two away from the through hole and the end of the sliding rod away from the through hole. A slider three is also slidably provided within the sliding groove two, and a threaded hole two is formed through the slider three, which engages with the adjusting screw. A hexagonal notch is formed at the end of the adjusting screw. The rod body has a slot on its bottom wall, located above the first truncated cone. The slot fits into a one-way locking strip. A sliding groove three is provided at one end of the rod body near the axis of the second truncated cone. A slider four slides within the sliding groove three. A sliding telescopic rod is provided at the bottom of the slider four away from the rod body. The sliding telescopic rod fits into an adjustment groove. An adjustment hole is provided through the side wall of the sliding groove three. The adjustment holes are arranged in a linear array. A buckle two is provided on the side wall of the slider four. The buckle two fits into the adjustment hole and can spring back after the pressure is removed. The spacing between the adjustment holes is the same as the spacing between each layer of the adjustment groove.

[0012] Furthermore, the top wall of the end of the slide bar away from the through hole is provided with an extension plate, and the top wall of the extension plate is provided with a lever.

[0013] Furthermore, the top wall of the slider three near the through hole is provided with an extension plate two, and the top of the extension plate two is provided with a rubber rod.

[0014] Furthermore, the positioning slider includes a second slider, a first buckle, and a trigger switch. The second slider is slidably engaged in the annular groove. The first buckle is elastically extended and retracted on the top wall of the second slider. The first buckle can rebound after the pressing pressure is removed. The first buckle fits into the positioning groove. The trigger switch is located on the side wall of the second slider. Preferably, the trigger switch is connected to the motor signal, and the one-way locking strip is connected to the motor signal.

[0015] The beneficial effects of the present invention using the above structure are as follows: The automotive wheel hub spot welding processing device provided by this solution allows for the selection of a number of limiting rods equal to the number of welding points when spot welding is required. The adjusting screw is rotated to make the distance from the rubber rod to the axis of the turntable equal to the inner diameter of the wheel hub. The position of slider four is adjusted according to the number of welding points so that the sliding telescopic rod can be inserted into the adjusting groove with the same number of welding points. Then, the sliding telescopic rod is inserted into the adjusting groove, and the insert rod is inserted into the annular groove two to fix the limiting rod. The electric telescopic rod retracts, and the retraction cover pulls the lever inward, pulling the rubber rod. The wheel hub can then be placed on the extension plate two. The electric telescopic rod extends, and the rubber rod pushes outward against the inner wall of the wheel hub to fix it, ensuring the welding points are located above the gap between the limiting rods. The electric screw displaces the welding points between the welding points, and the positioning slider is adjusted according to the included angle between the welding points. Once the welding point is positioned correctly, welding can begin. After welding at the current point, the motor controls the inner platform to rotate. Under the action of the one-way locking bar, the inner platform drives the turntable, outer ring, limit rod, and wheel hub to rotate. After the trigger rod touches the trigger switch, the trigger switch sends an electrical signal to the motor. The motor reverses and turns the lever back to the initial position. During the reverse rotation, the one-way locking bar disengages from the current slot and does not drive the turntable, outer ring, limit rod, or wheel hub to rotate until the locking bar enters the slot of the next limit rod. At this time, the locking bar is pressed twice, sending an electrical signal to the motor, which then switches to forward rotation and continues to rotate the wheel hub, sending the welding point to the spot welding machine for welding. Compared with the traditional method, this method can effectively fix the wheel hub, reduce the risk of it falling off during processing, prevent damage to equipment or operators, and can accurately adjust the wheel hub according to the distribution of welding points, making spot welding more precise. It can also adapt to the processing of wheel hubs of various sizes and welding point distributions. Attached Figure Description

[0016] Figure 1 A schematic diagram of a spot welding processing device for automobile wheel hubs provided by the present invention;

[0017] Figure 2 This invention provides a schematic diagram of the structure of an automotive wheel hub spot welding processing device, which removes the spot welding machine and the base.

[0018] Figure 3 This is a schematic diagram of another perspective of the automotive wheel hub spot welding processing device provided by the present invention, showing the removal of the spot welding machine and the base.

[0019] Figure 4 A schematic diagram of the top plate, outer ring, inner platform, turntable and limiting rod provided by the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the top plate and outer ring provided by the present invention;

[0021] Figure 6 A bottom view of the top plate and outer ring provided by the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the inner platform and the turntable provided by the present invention;

[0023] Figure 8 This is a schematic diagram of the structure of the turntable provided by the present invention;

[0024] Figure 9 This is a schematic diagram of the structure of the limiting rod provided by the present invention;

[0025] Figure 10 A cross-sectional view of the limiting rod provided by the present invention;

[0026] Figure 11 This is a schematic diagram of the positioning slider provided by the present invention.

[0027] The components include: 1. Base; 2. Spot welding machine; 3. Base plate; 4. Top plate; 5. Outer ring; 6. Inner platform; 7. Turntable; 8. Limiting rod; 101. Slide groove one; 102. Electric screw; 201. Upper welding head; 202. Lower welding head; 301. Lower layer plate; 302. Slider one; 303. Screw hole one; 401. Upper layer plate; 402. Circular groove one; 403. Annular groove one; 404. Positioning groove; 405. Positioning slider; 406. Slider two; 407. Buckle one; 408. Trigger switch; 501. Annular groove two; 601. Frustum one; 602. One-way locking strip; 603. Trigger rod; 60 4. Motor; 605. Circular groove two; 701. Frustum two; 702. Adjustment groove; 703. Electric telescopic rod; 704. Retractable cover; 801. Rod body; 802. Insert rod; 803. Slide groove two; 804. Slide rod; 805. Extension plate one; 806. Toggle lever; 807. Adjustment screw; 808. Slider three; 809. Extension plate two; 810. Rubber rod; 811. Through hole; 812. Hexagonal groove; 813. Spring; 814. Screw hole two; 815. Slot; 816. Slide groove three; 817. Slider four; 818. Sliding telescopic rod; 819. Adjustment hole; 820. Buckle two.

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] like Figures 1-11As shown, the present invention provides an automotive wheel hub spot welding processing device, including a base 1, a spot welding machine 2, a bottom plate 3, a top plate 4, an outer ring 5, an inner platform 6, a turntable 7, and a limiting rod 8. The spot welding machine 2 is located on the side of the base 1, the bottom plate 3 is slidably located above the base 1, the top plate 4 is located above the bottom plate 3, the top plate 4 includes an upper plate 401, a circular groove 402 is provided through the middle of the upper plate 401, the outer ring 5 is rotatably located in the circular groove 402, the outer ring 5 and the circular groove 402 are interference fit, the inner platform 6 is rotatably located inside the outer ring 5, the inner platform 6 includes a frustum 601, a circular groove 605 is opened on the top of the frustum 601, the turntable 7 is rotatably located in the circular groove 605, and the limiting rod 8 is locked above the inner platform 6.

[0032] The top wall of the base 1 has a sliding groove 101, and an electric screw 102 is installed in the sliding groove 101. The base plate 3 includes a lower plate 301, and a slider 302 is provided at the bottom of the lower plate 301. A screw hole 303 is provided through the slider 302. The slider 302 is slidably disposed in the sliding groove 101. The slider 302 and the sliding groove 101 are in close contact with each other. The screw hole 303 is threadedly engaged with the electric screw 102.

[0033] The spot welding machine 2 includes an upper welding head 201 and a lower welding head 202, with the upper welding head 201 located directly above the lower welding head 202.

[0034] The top wall of the outer ring 5 has an annular groove 2501.

[0035] The top wall of the truncated cone 601 is elastically telescopically equipped with a one-way locking strip 602. The one-way locking strip 602 can rebound after the pressing pressure is removed. The top wall of the one-way locking strip 602 is inclined. The side wall of the truncated cone 601 is equipped with a trigger rod 603, which is located below the top plate 4. The bottom wall of the truncated cone 601 is equipped with a motor 604. In the initial state, the line connecting the trigger rod 603 and the axis of the truncated cone 601 is set at 180° with the line connecting the spot welding machine 2 and the axis of the truncated cone 601.

[0036] The bottom wall of the upper plate 401 has an annular groove 403 that rotates. The annular groove 403 has a positioning groove 404. There are multiple positioning grooves 404 distributed along an arc. A positioning slider 405 is slidably engaged in the annular groove 403. The distribution of the positioning grooves 404 follows the principle that the angle of the trigger rod 603 rotating from the initial state to directly below each positioning groove 404 increases step by step. The angle of the trigger rod 603 rotating from the initial state to directly below each positioning groove 404 is equal to the included angle between each spoke in a common wheel hub with different number of spokes.

[0037] The turntable 7 includes a second truncated cone 701, an electric telescopic rod 703, and a retractable cover 704. The second truncated cone 701 is rotatably mounted in a second circular groove 605. The electric telescopic rod 703 is located on the top of the second truncated cone 701, and the retractable cover 704 is located on the top of the electric telescopic rod 703. The retractable cover 704 is a hollow truncated cone with an open bottom. An adjustment groove 702 is provided on the top of the second truncated cone 701. The adjustment grooves 702 are arranged in a circumferential array and distributed in multiple layers. The number of adjustment grooves in each layer of the circumferential array increases from the inside to the outside.

[0038] The limiting rod 8 includes a rod body 801, with an insert rod 802 at the bottom of the rod body 801. The insert rod 802 is inserted into an annular groove 501. A sliding groove 803 is formed on the top wall of the rod body 801. A sliding rod 804 is slidably engaged in the sliding groove 803. A through hole 811 is provided at the end of the sliding groove 803 away from the axis of the frustum 701. An adjusting screw 807 is rotatably provided at the end of the sliding rod 804 near the through hole 811. The end of the adjusting screw 807 passes through the through hole 811. A spring 813 is provided at the end of the sliding groove 803 away from the through hole 811 and the end of the sliding rod 804 away from the through hole 811. A slider 808 is also slidably provided in the sliding groove 803. A screw hole 814 is provided through the slider 808. The screw hole 814 is threadedly engaged with the adjusting screw 807. A six-pointed screw is provided at the end of the adjusting screw 807. The corner groove 812 and the bottom wall of the rod 801 are also provided with a slot 815. The slot 815 is located above the first truncated cone 601 and fits with the one-way locking strip 602. The end of the rod 801 near the axis of the second truncated cone 701 is provided with a sliding groove 3 816. A slider 4 817 is slidably provided in the sliding groove 3 816. The bottom of the end of the slider 4 817 away from the rod 801 is provided with a sliding telescopic rod 818. The sliding telescopic rod 818 fits with the adjustment groove 702. The side wall of the sliding groove 3 816 is provided with an adjustment hole 819. The adjustment holes 819 are arranged in a linear array. The side wall of the slider 4 817 is provided with a snap buckle 2 820 that is elastically telescopic. The snap buckle 2 820 fits with the adjustment hole 819 and can spring back after the pressure is removed. The spacing between the adjustment holes 819 is the same as the spacing between each layer of the adjustment groove 702.

[0039] The top wall of the slide bar 804 away from the through hole 811 is provided with an extension plate 805, and the top wall of the extension plate 805 is provided with a lever 806.

[0040] The top wall of the slider 3 808 near the through hole 811 is provided with an extension plate 2 809, and the top of the extension plate 2 809 is provided with a rubber rod 810.

[0041] The positioning slider 405 includes a second slider 406, a first buckle 407, and a trigger switch 408. The second slider 406 is slidably locked in the annular groove 403. The first buckle 407 is elastically telescopically mounted on the top wall of the second slider 406. The first buckle 407 can spring back after the pressing pressure is removed. The first buckle 407 fits into the positioning groove 404. The trigger switch 408 is located on the side wall of the second slider 406. Preferably, the trigger switch 408 is signal-connected to the motor 604, and the one-way locking strip 602 is signal-connected to the motor 604.

[0042] In practical use, first select the same number of limit rods 8 according to the number of welding points on the wheel hub. Rotate the adjusting screw 807 so that the distance from the rubber rod 810 to the axis of the turntable 7 is equal to the inner diameter of the wheel hub. Then, according to the number of welding points, press the second buckle 820 inward and pull the fourth slider 817 to adjust the position of the sliding telescopic rod 818 so that the distance from the insertion rod 802 to the sliding telescopic rod 818 is equal to the distance from the annular groove 501 to the adjusting groove 702 with the same number of welding points. The sliding telescopic rod 818 can be inserted into the adjusting groove 702 with the same number of welding points. Then, insert the sliding telescopic rod 818 into the adjusting groove 702 and insert the insertion rod 802 into the annular groove 501. Inside groove 2 501, the limiting rod 8 is fixed, and the electric telescopic rod 703 retracts. The retraction cover 704 pulls the lever 806 inward, pulling the rubber rod 810. Then, the wheel hub can be placed on extension plate 2 809. The electric telescopic rod 703 extends, and the rubber rod 810 pushes outward against the inner wall of the wheel hub, fixing the wheel hub and positioning the welding point above the gap between the limiting rods 8. The welding point is then moved to the spot welding machine 2 by the electric screw 102. At this time, the turntable 7 and the outer ring 5 are locked in a locked state by the engagement of the sliding telescopic rod 818 and the friction between the insertion rod 802 and the annular groove 2 501. Then, the angle between the welding points is adjusted. Positioning the slider 405 causes the trigger rod 603 to rotate until the angle required by the trigger switch 408 is the same as the angle between the welding point and the trigger position, then welding can begin. (If the limit rod 8 affects the welding operation of the spot welding machine 2, the motor 604 needs to be controlled to adjust the initial position of the trigger rod 603 and rotate the annular groove 403 so that the adjusting groove 702 cooperates with the trigger rod 603.) The upper welding head 201 and the lower welding head 202 extend to spot weld the hub. After spot welding at the current point is completed, the motor 604 controls the inner platform 6 to rotate. Under the action of the one-way clamp 602, the inner platform 6 drives the turntable 7, the outer ring 5, the limit rod 8, and the hub to rotate. After the trigger rod 603 touches the trigger switch 408, the trigger switch... 408 transmits an electrical signal, and motor 604 reverses to rotate lever 806 to its initial position. During the reversal, one-way locking strip 602 disengages from the current slot 815, without causing the turntable 7, outer ring 5, limit rod 8, and hub to rotate, until the locking strip enters the slot 815 of the next limit rod 8. At this time, the locking strip is pressed twice by the bottom wall of the limit rod 8, and an electrical signal is transmitted to motor 604. Motor 604 then switches to forward rotation and continues to rotate the hub, transmitting the welding point to spot welding machine 2. After welding at each point is completed, electric screw 102 is controlled to move base plate 3 away from spot welding machine 2. At the same time, electric telescopic rod 703 retracts again, causing rubber rod 810 to retract centripetally, removing the hub and completing the processing.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An apparatus for spot welding of an automobile wheel hub, characterized by: Including base (1), spot welding machine (2), bottom plate (3), top plate (4), outer ring (5), inner table (6), rotary table (7) and limit rod (8), the spot welding machine (2) is located in the side of base (1), the bottom plate (3) is slidably arranged above the base (1), the top plate (4) is arranged above the bottom plate (3), the top plate (4) includes upper layer plate (401), the upper layer plate (401) is provided with circular groove one (402) in the middle, the outer ring (5) is rotatably arranged in the circular groove one (402), the outer ring (5) is in interference fit with the circular groove one (402), the inner table (6) is rotatably arranged on the inner side of the outer ring (5), the inner table (6) includes circular table one (601), the circular table one (601) is provided with circular groove two (605) on the top, the rotary table (7) is rotatably arranged in the circular groove two (605), the limit rod (8) is clamped on the top of the inner table (6), the top wall of the base (1) is provided with sliding groove one (101), the sliding groove one (101) is provided with electric screw (102) inside, the bottom plate (3) includes lower layer plate (301), the lower layer plate (301) is provided with sliding block one (302) on the bottom, the sliding block one (302) is provided with screw hole one (303) through on the top, the sliding block one (302) is slidably arranged in the sliding groove one (101), the sliding block one (302) is mutually attached with the sliding groove one (101), the screw hole one (303) is in threaded engagement with the electric screw (102), the top wall of the outer ring (5) is provided with annular groove two (501); The rotary table (7) includes circular table two (701), the circular table two (701) is provided with adjusting groove (702) on the top, the top wall of the circular table one (601) is elastically telescopic and provided with one-way clamping strip (602) The limiting rod (8) comprises a rod body (801), the bottom of the rod body (801) is provided with an insertion rod (802), the insertion rod (802) is inserted into the annular groove two (501), the top wall of the rod body (801) is provided with a sliding groove two (803), a sliding rod (804) is slidably clamped in the sliding groove two (803), a through hole (811) is formed in the end of the sliding groove two (803) away from the axis of the circular table two (701), an adjusting screw rod (807) is rotatably arranged at the end of the sliding rod (804) close to the through hole (811), the end of the adjusting screw rod (807) passes through the through hole (811), a spring (813) is arranged at the end of the sliding rod (804) away from the through hole (811) and the end of the sliding groove two (803) away from the through hole (811), a sliding block three (808) is slidably arranged in the sliding groove two (803), a threaded hole two (814) is formed in the sliding block three (808), the threaded hole two (814) is threadedly engaged with the adjusting screw rod (807), a hexagonal groove (812) is formed in the end of the adjusting screw rod (807), a clamping groove (815) is formed in the bottom wall of the rod body (801), the clamping groove (815) is arranged above the circular table one (601), the clamping groove (815) is attached to the one-way clamping strip (602), a sliding groove three (816) is formed in the end of the rod body (801) close to the axis of the circular table two (701), a sliding block four (817) is slidably arranged in the sliding groove three (816), a sliding telescopic rod (818) is arranged at the bottom of the end of the sliding block four (817) away from the rod body (801), the sliding telescopic rod (818) is attached to the adjusting groove (702), an adjusting hole (819) is formed in the side wall of the sliding groove three (816), the adjusting holes (819) are linearly arranged, a buckle two (820) is elastically arranged in the side wall of the sliding block four (817), the buckle two (820) is attached to the adjusting hole (819), the buckle two (820) can rebound after the pressing force is removed, and the spacing between the adjusting holes (819) is the same as the spacing between each layer of the adjusting groove (702).

2. The apparatus for spot welding of automobile wheel hub as claimed in claim 1 wherein: The bottom wall of the upper layer plate (401) is rotatably provided with an annular groove one (403), the annular groove one (403) is provided with a positioning groove (404), the positioning groove (404) is provided with a plurality of positioning grooves (404) and is distributed along a circular arc line, and the annular groove one (403) is slidably clamped with a positioning sliding block (405).

3. The apparatus for spot welding of an automobile wheel hub as claimed in claim 2, wherein: The rotary table (7) further comprises an electric telescopic rod (703) and a retractable cover (704), the circular table two (701) is rotatably arranged in the circular groove two (605), the electric telescopic rod (703) is arranged at the top of the circular table two (701), and the retractable cover (704) is arranged at the top of the electric telescopic rod (703). The retractable cover (704) is a hollow circular table with an open bottom.

4. The apparatus for spot welding of an automobile wheel hub according to claim 3, wherein: The one-way clamping strip (602) can rebound after the pressing force is removed, the top wall of the one-way clamping strip (602) is inclined, the side wall of the circular table one (601) is provided with a trigger rod (603), the trigger rod (603) is arranged below the top plate (4), and the bottom wall of the circular table one (601) is provided with a motor (604).

5. The apparatus for spot welding of an automobile wheel hub as claimed in claim 4, wherein: The positioning sliding block (405) comprises a sliding block two (406), a buckle one (407) and a trigger switch (408), the sliding block two (406) is slidingly clamped in the annular groove one (403), the buckle one (407) is elastically arranged on the top wall of the sliding block two (406), the buckle one (407) can rebound after the pressing force is removed, the buckle one (407) is attached to the positioning groove (404), and the trigger switch (408) is arranged on the side wall of the sliding block two (406).

6. The apparatus for spot welding of an automobile wheel hub as claimed in claim 5, wherein: The top wall of one end of the sliding rod (804) away from the through hole (811) is provided with an extension plate one (805), and the top wall of the extension plate one (805) is provided with a lever (806).

7. The apparatus for spot welding of an automobile wheel hub as claimed in claim 6, wherein: The top wall of one end of the sliding block three (808) close to the through hole (811) is provided with an extension plate two (809), and the top of the extension plate two (809) is provided with a rubber rod (810).

8. The apparatus for spot welding of an automobile wheel hub as claimed in claim 7, wherein: The spot welding machine (2) comprises an upper welding head (201) and a lower welding head (202), and the upper welding head (201) is arranged directly above the lower welding head (202).

Images