A spot welding device for automobile wheel hub

Abstract

The present invention belongs to the technical field of wheel hub processing, and discloses a spot welding device for automobile wheel hub, including a mounting frame, an electric turntable is provided at the bottom end of the mounting frame, the rotating end of the electric turntable is connected to the bottom end of the mounting frame, a frame is fixedly installed at one end of the mounting frame, a welding assembly is fixedly installed at the top end of the frame, a power assembly is fixedly sleeved in the middle of the mounting frame, and a fixed plate is fixedly installed at the top end of the mounting frame. The present invention can act on the clamping assembly by inputting compressed gas into the interior of the power assembly and realize the clamping of the outer side of the wheel hub while realizing the lowering of the inner support assembly, and when the gas inside the power assembly is released, the clamping assembly can be automatically reset to release the external clamping and realize the automatic rise of the inner support assembly, and the inner support process is completed, completing the closed-loop process, so that the device can quickly switch between the clamping and inner support states, meet the spot welding requirements of different positions, and improve the spot welding quality.

Description

Technical Field

[0001] The invention belongs to the technical field of wheel hub processing, and in particular relates to a spot welding device for an automobile wheel hub. Background Art

[0002] The automobile wheel hub is the part of the wheel center where the axle is installed. It is also called the wheel rim, steel rim, wheel, tire bell, etc. As an important part of the car, the wheel hub not only bears the weight of the whole vehicle, but also affects the performance, appearance and safety of the vehicle. In the processing of automobile wheel hubs, the surface of the wheel hub needs to be welded, and spot welding is generally used. For this purpose, a wheel hub welding device is needed to assist in the welding of the wheel hub.

[0003] In the spot welding process of automobile wheel hubs, a special welding device is used to assist in welding. The device is generally composed of a clamping assembly and a welding assembly. When in use, the wheel hub is clamped above the workbench to ensure that the wheel hub does not deviate before operating the welding assembly to perform the welding process of the wheel hub. However, during the entire welding process, not only the end face of the wheel hub needs to be welded, but also the outer side face of the wheel hub needs to be welded. The clamping assembly currently used cannot perform effective clamping and fixing when performing spot welding operations on the outer side face, which seriously affects the spot welding effect.

[0004] At the same time, when welding the automobile wheel hub, when the inner and outer sides of the wheel hub need to be welded, the position of the welding component and the clamping method of the clamping component are limited, resulting in the position to be welded being blocked by the clamping component, which in turn requires frequent switching of the clamping position during welding, seriously affecting the spot welding efficiency. Summary of the invention

[0005] The object of the present invention is to provide a spot welding device for automobile wheel hub to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a kind of automobile wheel hub spot welding device comprises a mounting frame, the bottom end of the mounting frame is provided with an electric turntable, the rotating end of the electric turntable is connected to the bottom end of the mounting frame, one end of the mounting frame is fixedly installed with a frame, the top end of the frame is fixedly installed with a welding assembly, the middle part of the mounting frame is fixedly sleeved with a power assembly, the top end of the mounting frame is fixedly installed with a fixed disk, the top end of the fixed disk is axially evenly spaced with a card slot, the internal movable card of the card slot is connected with a clamping assembly, the bottom end of the fixed disk is provided with a movable plate, the clamping assembly is installed at the top end of the movable plate at equal angles, the bottom end of the movable plate is fixedly installed with a fixed frame, the middle part of the top end of the mounting frame is fixedly installed with an air pump, the output end of the air pump is connected with the input end of the power assembly, one end of the power assembly is connected to the bottom end of the fixed frame, the top end of the power assembly is fixedly connected with an inner support assembly, the inner support assembly is fixedly sleeved with the middle part of the movable plate, and the middle part of the fixed disk is provided with a through hole for the inner support assembly to move up and down.

[0007] When spot welding the wheel hub, the wheel hub can be placed on top of the fixed plate and the welding assembly can be adjusted to the initial position while keeping the air free inside the power assembly. At this time, the power assembly is in the initial state and the clamping assembly is also in the initial state, thus completing the preparations before spot welding of the wheel hub.

[0008] As a further technical solution of the present invention, the welding assembly includes a height-adjusting push rod, the bottom end of which is connected to the top of the frame, an extension guide rail is fixedly installed on the output end of the height-adjusting push rod, and a guide block is movably connected inside the extension guide rail.

[0009] As a further technical solution of the present invention, a welding box is fixedly installed on the top end of the guide block, and a welding head is installed on the bottom end of the guide block through a movable shaft, and the welding head rotates relative to the guide block.

[0010] When the clamping of the outer side of the wheel hub is completed and the end face of the wheel hub needs to be spot welded, the welding box can be moved by moving the guide block. When the welding head at the bottom is adjusted to the welding position, the electric turntable can be turned on to drive the mounting frame to rotate. At this time, the fixed plate at the top rotates accordingly, and drives the wheel hub at the top to rotate, and the end face welding process is completed in coordination with the welding of the welding head;

[0011] When spot welding is required on the inner side of the wheel hub, the guide block can be moved to the middle of the fixed plate, and the welding head can be rotated counterclockwise so that the welding end of the welding head corresponds to the inner side of the wheel hub, and the height adjustment push rod is turned on to adjust the corresponding height, and the fixed plate is driven to rotate again to complete the spot welding process on the inner side of the wheel hub;

[0012] When spot welding is required on the outer side of the wheel hub, the device can be switched to the inner support state. At this time, the clamping device on the outside is released. The guide block can be moved to the outer side close to the fixed plate, and the welding head can be rotated clockwise so that the welding end of the welding head corresponds to the outer side of the wheel hub. The spot welding process on the outer side of the wheel hub is completed by the cooperation of the height adjustment push rod and the fixed plate.

[0013] By utilizing the cooperation between the clamping assembly and the inner support assembly, as well as the freely rotatable welding head, the device can quickly spot weld the inner side surface of the wheel hub when it is in the clamping state, and the inner support assembly is not in action at this time, which will not interfere with the spot welding process. When the device is in the inner support state, the outer side surface of the wheel hub can be spot welded, and the clamping assembly is also in a non-working state at this time, which will not affect the normal spot welding. There is no need to frequently switch the clamping, thereby avoiding affecting the spot welding efficiency.

[0014] As a further technical solution of the present invention, the power assembly includes an air storage pipe, the outer side surface of the air storage pipe is fixedly sleeved with the mounting frame, a No. 1 three-way valve is fixedly installed on the bottom end of the air storage pipe, the bottom end of the No. 1 three-way valve is connected to the output end of the air pump, the inside of the air storage pipe is movably sleeved with a piston plate, the top of the piston plate is fixedly installed with a piston rod, the top end of the piston rod passes through the top of the air storage pipe and is connected to the middle part of the bottom end of the fixed frame.

[0015] As a further technical solution of the present invention, the outer side surface of the piston rod is movably sleeved with a limit spring, the upper and lower ends of the limit spring are respectively connected to the top of the inner cavity of the air storage tube and the top of the piston plate, the front and rear sides of the outer side surface of the air storage tube near the top are fixedly connected to an intake valve, and the front and rear sides of the outer side surface of the air storage tube are fixedly connected to an exhaust valve located above the intake valve.

[0016] As a further technical solution of the present invention, the front and rear ends of the No. 1 three-way valve are fixedly connected with an air duct, the other end of the air duct is connected to the intake valve, and the other end of the exhaust valve is fixedly connected with an air supply pipe, and a No. 2 three-way valve is fixedly connected between the two air supply pipes, the top of the No. 2 three-way valve is connected to the bottom end of the inner support assembly, the intake valve and the exhaust valve are both one-way valves, and the directions of the valves are respectively inward conduction and outward blockage and outward conduction and inward blockage.

[0017] When the device is in the clamping state, that is, when spot welding is performed on the end face and the inner side face of the wheel hub, air can be input into the interior of the No. 1 three-way valve by turning on the air pump. At this time, the air inlet valve needs to be kept in the open state, while the air outlet valve needs to be kept in the closed state. The air is then introduced into the interior of the air storage pipe through the No. 1 three-way valve and the air guide pipe, and the piston plate is pushed downward, and the piston rod is driven downward. At this time, the limit spring can be stretched, and when the piston rod moves downward, the movable plate is driven downward accordingly;

[0018] When the device is in the internal support state, that is, when spot welding is performed on the outer side of the wheel hub, the air pump can be turned off, the exhaust valve can be opened, and the intake valve can be closed. At this time, the air inside the air storage pipe can be discharged through the air supply pipe and enter the interior of the internal support assembly through the No. 2 three-way valve, and the limit spring automatically resets, driving the piston rod to move upward, and finally driving the movable plate and the internal support assembly to move upward.

[0019] As a further technical solution of the present invention, the clamping assembly includes a card block, which is movably connected to the card slot, a clamping plate is fixedly installed on the top of the card block, and a first fixing seat is fixedly installed on the bottom of the card block.

[0020] As a further technical solution of the present invention, one end of the first fixed seat away from the blocking block is movably connected to a connecting rod via a rotating shaft, and one end of the connecting rod away from the first fixed seat is movably connected to a second fixed seat via a rotating shaft, and the bottom end of the second fixed seat is connected to the top end of the movable plate.

[0021] When the device is in a clamping state, the downward displacement of the movable plate can drive the second fixed seat to move downward. At this time, the connecting rod is deflected toward the inner side and a pulling force is applied to the clamping block. At this time, the clamping block can be displaced toward the middle of the fixed disk under the action of the clamping groove, and the clamping plate is driven to move toward the middle of the fixed disk. The inner support assembly moves downward under the action of the movable plate. When multiple clamping plates are close to each other, the outer side of the wheel hub can be clamped, and the clamping process is completed quickly.

[0022] By using compressed air as the power, the device can quickly clamp the hub on the top of the fixed disk through the action of the power component and in cooperation with the clamping component, and can quickly perform the positioning spot welding process in cooperation with the welding component. The whole process can be completed quickly, avoiding the complicated clamping process of the traditional device and the problem of positioning welding, which can effectively shorten the preparation time before welding and further improve the welding efficiency.

[0023] As a further technical solution of the present invention, the inner support assembly includes a movable tube, the outer side surface of the movable tube is fixedly connected to the movable plate, an air intake cavity is opened inside the movable tube, the top end of the air intake cavity is fixedly connected to the inner support tube, and the top end of the inner support tube is fixedly connected to the pressure relief valve.

[0024] As a further technical solution of the present invention, the outer side surface of the inner support tube is axially and evenly spaced and movably connected with an inner support head, the rear end of the inner support head is fixedly connected with a limit plate located inside the inner support tube, and the outer side surface of the inner support head is movably connected with a return spring, and the left and right ends of the return spring are respectively connected to one end of the inner support tube and one end of the limit plate.

[0025] When the device is in the internal support state, the movable plate moves upward, which can drive the internal support assembly to move upward. At the same time, all the compressed air inside the power assembly can be released to the inside of the air intake chamber through the No. 2 three-way valve and enter the inside of the internal support tube. As all the air enters, multiple limit plates are subsequently subjected to thrust from the air. At this time, the return spring is compressed and drives multiple internal support heads to move toward the outer side of the inner support tube until the end face of the internal support head contacts the inner side of the wheel hub. At this time, the multi-point support process of the inner side of the wheel hub can be completed.

[0026] By setting up a clamping assembly and an inner support assembly and cooperating them with a power assembly, compressed gas can be input into the interior of the power assembly to act on the clamping assembly and achieve the clamping of the outer side of the hub while the inner support assembly descends. When the gas inside the power assembly is released, the clamping assembly can be automatically reset to release the external clamping and the inner support assembly can be automatically raised, and the inner support process and the closed-loop process can be completed, so that the device can quickly switch between the clamping and inner support states to meet the spot welding needs of different positions and improve the spot welding quality.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The present invention sets a clamping assembly and an inner support assembly, and cooperates with a power assembly. By inputting compressed gas into the interior of the power assembly, the clamping assembly can be acted on to achieve the lowering of the inner support assembly while clamping the outer side of the hub. When the gas inside the power assembly is released, the clamping assembly can be automatically reset to release the external clamping and the inner support assembly can be automatically raised, and the inner support process and the closed-loop process can be completed, so that the device can quickly switch between the clamping and inner support states to meet the spot welding requirements of different positions and improve the spot welding quality.

[0029] 2. The present invention utilizes the cooperation between the clamping assembly and the inner support assembly, as well as the freely rotatable welding head, so that when the device is in the clamping state, the inner side surface of the wheel hub can be spot welded quickly, and at this time the inner support assembly is not in action, which will not interfere with the spot welding process. When the device is in the inner support state, the outer side surface of the wheel hub can be spot welded, and at this time the clamping assembly is also in a non-working state, which will not affect the normal spot welding. There is no need to frequently switch the clamping, thereby avoiding affecting the spot welding efficiency.

[0030] 3. The present invention utilizes compressed air as power, so that the device can quickly clamp the hub on the top of the fixed disk through the action of the power component and in cooperation with the clamping component, and can quickly perform the positioning spot welding process in cooperation with the welding component. The whole process can be completed quickly, avoiding the complex clamping process of the traditional device and the need for positioning welding, which can effectively shorten the preparation time before welding and further improve the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the coordination of the electric turntable, the frame and the welding assembly structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the local structure of the welding assembly of the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the hidden frame and welding components of the present invention;

[0035] Figure 5 It is a separate schematic diagram of the power assembly structure of the present invention;

[0036] Figure 6 It is a cross-sectional schematic diagram of the internal structure of the power assembly of the present invention;

[0037] Figure 7 It is a schematic diagram of the coordination of the fixed plate, the clamping assembly and the inner support assembly structure of the present invention;

[0038] Figure 8 is a separate schematic diagram of the clamping assembly structure of the present invention;

[0039] Fig. 9 It is a separate schematic diagram of the inner support assembly structure of the present invention;

[0040] Fig.10 for Fig. 9 A magnified schematic diagram of the structure in the middle.

[0041] In the figure: 1. Mounting frame; 2. Electric turntable; 3. Rack; 4. Welding assembly; 401. Height adjustment push rod; 402. Extended guide rail; 403. Guide block; 404. Welding head; 405. Welding box; 5. Power assembly; 501. Gas storage pipe; 502. No. 1 three-way valve; 503. Gas guide pipe; 504. Inlet valve; 505. Exhaust valve; 506. Gas pipe; 507. No. 2 three-way valve; 508. Piston plate; 509. Piston rod ;5010, limit spring; 6, fixed plate; 7, slot; 8, movable plate; 9, fixed frame; 10, air pump; 11, clamping assembly; 111, block; 112, clamping plate; 113, first fixed seat; 114, second fixed seat; 115, connecting rod; 12, inner support assembly; 121, movable tube; 122, air inlet chamber; 123, inner support tube; 124, limit plate; 125, inner support head; 126, reset spring; 127, pressure relief valve. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figures 1 to 10 As shown, in the embodiment of the present invention, a spot welding device for automobile wheel hub includes a mounting frame 1, an electric turntable 2 is provided at the bottom end of the mounting frame 1, a rotating end of the electric turntable 2 is connected to the bottom end of the mounting frame 1, a frame 3 is fixedly installed at one end of the mounting frame 1, a welding assembly 4 is fixedly installed at the top of the frame 3, a power assembly 5 is fixedly sleeved at the middle of the mounting frame 1, a fixing plate 6 is fixedly installed at the top of the mounting frame 1, a card slot 7 is provided at an axially equal interval at the top end of the fixing plate 6, a clamping assembly 11 is movably clamped inside the card slot 7, and the fixing plate A movable plate 8 is provided at the bottom end of 6, and a clamping assembly 11 is installed at an equal angle on the top of the movable plate 8. A fixing frame 9 is fixedly installed at the bottom end of the movable plate 8, and an air pump 10 is fixedly installed in the middle of the top of the mounting frame 1. The output end of the air pump 10 is connected to the input end of the power assembly 5, and one end of the power assembly 5 is connected to the bottom end of the fixing frame 9. The top of the power assembly 5 is fixedly connected with an inner support assembly 12, and the inner support assembly 12 is fixedly sleeved with the middle part of the movable plate 8. A through hole is opened in the middle of the fixed plate 6 for the inner support assembly 12 to move up and down.

[0044] When spot welding the wheel hub, the wheel hub can be placed on top of the fixed plate 6, and the welding assembly 4 can be adjusted to the initial position, while keeping the power assembly 5 free of air. At this time, the power assembly 5 is in the initial state, and the clamping assembly 11 is also in the initial state, completing the preparations before spot welding of the wheel hub.

[0045] like Figure 1 and Figure 2 as well as Figure 3 As shown, the welding assembly 4 includes a height-adjusting push rod 401, the bottom end of which is connected to the top of the frame 3, an extension guide rail 402 is fixedly installed at the output end of the height-adjusting push rod 401, a guide block 403 is movably connected inside the extension guide rail 402, a welding box 405 is fixedly installed at the top of the guide block 403, a welding head 404 is installed at the bottom end of the guide block 403 through a movable shaft, and the welding head 404 rotates relative to the guide block 403.

[0046] Embodiment: When the clamping of the outer side of the wheel hub is completed and the end face of the wheel hub needs to be spot welded, the welding box 405 can be driven to move by moving the guide block 403. When the welding head 404 at the bottom is adjusted to the welding position, the electric turntable 2 can be turned on to drive the mounting frame 1 to rotate. At this time, the fixing plate 6 at the top rotates accordingly, and drives the wheel hub at the top to rotate, and cooperates with the welding of the welding head 404 to complete the end face welding process;

[0047] When spot welding is required on the inner side of the wheel hub, the guide block 403 can be moved to the middle of the fixed plate 6, and the welding head 404 can be rotated counterclockwise so that the welding end of the welding head 404 corresponds to the inner side of the wheel hub, and the height adjustment push rod 401 is turned on to adjust the corresponding height, and the fixed plate 6 is driven to rotate again to complete the spot welding process on the inner side of the wheel hub;

[0048] When spot welding is required on the outer side of the wheel hub, the device can be switched to the inner support state. At this time, the clamping device on the outside is released. The guide block 403 can be moved to the outer side close to the fixed plate 6, and the welding head 404 can be rotated clockwise so that the welding end of the welding head 404 corresponds to the outer side of the wheel hub, and the spot welding process of the outer side of the wheel hub is completed by the cooperation of the height adjustment push rod 401 and the fixed plate 6.

[0049] By utilizing the cooperation between the clamping assembly 11 and the inner support assembly 12, and the freely rotatable welding head 404, the device can quickly spot weld the inner side surface of the wheel hub when it is in the clamping state, and the inner support assembly is not in action at this time, which will not interfere with the spot welding process. When the device is in the inner support state, the outer side surface of the wheel hub can be spot welded, and the clamping assembly is also in a non-working state at this time, which will not affect the normal spot welding. There is no need to frequently switch the clamping, thereby avoiding affecting the spot welding efficiency.

[0050] like Figure 1 and Figure 4 as well as Figure 5 and Figure 6As shown, the power assembly 5 includes an air storage pipe 501, the outer side surface of the air storage pipe 501 is fixedly sleeved with the mounting frame 1, a No. 1 three-way valve 502 is fixedly installed at the bottom end of the air storage pipe 501, and the bottom end of the No. 1 three-way valve 502 is connected to the output end of the air pump 10, and the interior of the air storage pipe 501 is movably sleeved with a piston plate 508, and a piston rod 509 is fixedly installed at the top of the piston plate 508, and the top of the piston rod 509 passes through the top of the air storage pipe 501 and is connected to the middle part of the bottom end of the fixing frame 9, and the outer side surface of the piston rod 509 is movably sleeved with a limit spring 5010, and the upper and lower ends of the limit spring 5010 are respectively connected to the top of the inner cavity of the air storage pipe 501 and the top of the piston plate 508, and the air storage pipe 5 01 The front and rear sides of the outer side surface near the top are fixedly connected with an intake valve 504, the front and rear sides of the outer side surface of the air storage pipe 501 are fixedly connected with an exhaust valve 505 located above the intake valve 504, the front and rear ends of the No. 1 three-way valve 502 are fixedly connected with an air guide pipe 503, the other end of the air guide pipe 503 is connected to the intake valve 504, the other end of the exhaust valve 505 is fixedly connected with an air supply pipe 506, and a No. 2 three-way valve 507 is fixedly connected between the two air supply pipes 506, the top of the No. 2 three-way valve 507 is connected to the bottom end of the inner support assembly 12, the intake valve 504 and the exhaust valve 505 are both one-way valves, and the directions of the valves are inward conduction and outward blockage and outward conduction and inward blockage, respectively.

[0051] When the device is in a clamping state, that is, when spot welding is performed on the end face and the inner side face of the wheel hub, air can be input into the interior of the No. 1 three-way valve 502 by turning on the air pump 10. At this time, the air inlet valve 504 needs to be kept in an open state, while the exhaust valve 505 is in a closed state. The air is then introduced into the interior of the air storage pipe 501 through the No. 1 three-way valve 502 and the air guide pipe 503, and the piston plate 508 is pushed downward, and the piston rod 509 is driven downward. At this time, the limit spring 5010 can be stretched. When the piston rod 509 moves downward, the movable plate 8 is driven downward accordingly.

[0052] When the device is in the internal support state, that is, when spot welding is performed on the outer side of the wheel hub, the air pump 10 can be closed, the exhaust valve 505 can be opened, and the intake valve 504 can be closed. At this time, the air inside the air storage pipe 501 can be discharged through the air supply pipe 506, and enter the interior of the internal support assembly 12 through the No. 2 three-way valve 507, and the limit spring 5010 is automatically reset, driving the piston rod 509 to move upward, and finally driving the movable plate 8 and the internal support assembly 12 to move upward.

[0053] like Figure 4 and Figure 7 as well as Figure 8As shown, the clamping assembly 11 includes a clamping block 111, which is movably clamped with the clamping slot 7, a clamping plate 112 is fixedly installed on the top of the clamping block 111, a first fixed seat 113 is fixedly installed on the bottom of the clamping block 111, and the end of the first fixed seat 113 away from the clamping block 111 is movably connected to a connecting rod 115 through a rotating shaft, and the end of the connecting rod 115 away from the first fixed seat 113 is movably connected to a second fixed seat 114 through a rotating shaft, and the bottom end of the second fixed seat 114 is connected to the top of the movable plate 8.

[0054] When the device is in the clamping state, the downward displacement of the movable plate 8 can drive the second fixed seat 114 to move downward. At this time, the connecting rod 115 is deflected toward the inner side and a pulling force is applied to the clamping block 111. At this time, the clamping block 111 can be displaced toward the middle of the fixed disk 6 under the action of the clamping groove 7, and at the same time drive the clamping plate 112 to move toward the middle of the fixed disk 6, and the inner support assembly 12 moves downward under the action of the movable plate 8. When multiple clamping plates 112 are close to each other, the outer side of the wheel hub can be clamped, and the clamping process is quickly completed.

[0055] By using compressed air as the power, the device can quickly clamp the hub at the top of the fixed disk 6 through the action of the power component 5 and in cooperation with the clamping component 11, and can quickly perform the positioning spot welding process in cooperation with the welding component 4. The whole process can be completed quickly, avoiding the complicated clamping process of the traditional device and the need for positioning welding, which can effectively shorten the preparation time before welding and further improve the welding efficiency.

[0056] like Figure 1 and Figure 7 as well as Fig. 9 and Fig.10 As shown, the inner support assembly 12 includes a movable tube 121, the outer side surface of the movable tube 121 is fixedly sleeved with the movable plate 8, an air inlet cavity 122 is opened inside the movable tube 121, the top of the air inlet cavity 122 is fixedly connected with an inner support tube 123, the top of the inner support tube 123 is fixedly connected with a pressure relief valve 127, the outer side surface of the inner support tube 123 is axially and evenly spaced and movably sleeved with an inner support head 125, the rear end of the inner support head 125 is fixedly connected with a limit plate 124 located inside the inner support tube 123, the outer side surface of the inner support head 125 is movably sleeved with a return spring 126, and the left and right ends of the return spring 126 are respectively connected to one end of the inner support tube 123 and one end of the limit plate 124.

[0057] Embodiment: When the device is in the internal support state, the movable plate 8 moves upward, which can drive the internal support assembly 12 to move upward. At the same time, all the compressed air inside the power assembly 5 can be released to the inside of the air inlet chamber 122 through the No. 2 three-way valve 507, and enter the inside of the internal support tube 123. As all the air enters, multiple limit plates 124 are subjected to thrust from the air. At this time, the return spring 126 is compressed and drives multiple internal support heads 125 to move toward the outer side surface of the internal support tube 123 until the end face of the internal support head 125 contacts the inner side surface of the wheel hub. At this time, the multi-point support process of the inner side surface of the wheel hub can be completed.

[0058] By setting up the clamping component 11 and the inner support component 12, and cooperating them with the power component 5, compressed gas can be input into the inside of the power component 5 to act on the clamping component 11 and realize the lowering of the inner support component 12 while completing the clamping of the outer side of the hub. When the gas inside the power component 5 is released, the clamping component 11 can be automatically reset to release the external clamping and the inner support component 12 can be automatically raised, and the inner support process and the closed-loop process can be completed, so that the device can quickly switch between the clamping and inner support states to meet the spot welding requirements of different positions and improve the spot welding quality.

[0059] Working principle and usage process:

[0060] When spot welding the wheel hub, the wheel hub can be placed on the fixing plate 6, and the welding assembly 4 can be adjusted to the initial position, while keeping the power assembly 5 free of air. At this time, the power assembly 5 is in the initial state, and the clamping assembly 11 is also in the initial state, completing the preparations before spot welding of the wheel hub;

[0061] When the device is in a clamping state, that is, when spot welding is performed on the end face and the inner side face of the wheel hub, air can be input into the interior of the No. 1 three-way valve 502 by turning on the air pump 10. At this time, the air inlet valve 504 needs to be kept in an open state, while the exhaust valve 505 is in a closed state. The air is then introduced into the interior of the air storage pipe 501 through the No. 1 three-way valve 502 and the air guide pipe 503, and the piston plate 508 is pushed downward, and the piston rod 509 is driven downward. At this time, the limit spring 5010 can be stretched. When the piston rod 509 moves downward, the movable plate 8 is driven downward accordingly.

[0062] When the device is in the clamping state, the downward displacement of the movable plate 8 can drive the second fixing seat 114 to move downward, and the connecting rod 115 is deflected toward the inner side surface, and a pulling force is applied to the clamping block 111. At this time, the clamping block 111 can be displaced toward the middle of the fixing plate 6 under the action of the clamping groove 7, and the clamping plate 112 is driven to move toward the middle of the fixing plate 6. The inner support assembly 12 moves downward under the action of the movable plate 8. When multiple clamping plates 112 are close to each other, the outer side surface of the wheel hub can be clamped, and the clamping process is quickly completed;

[0063] When the clamping of the outer side of the wheel hub is completed and the end face of the wheel hub needs to be spot welded, the welding box 405 can be driven to move by moving the guide block 403. When the welding head 404 at the bottom is adjusted to the welding position, the electric turntable 2 can be turned on to drive the mounting frame 1 to rotate. At this time, the fixing plate 6 at the top rotates accordingly, and drives the wheel hub at the top to rotate, and the end face welding process is completed in cooperation with the welding of the welding head 404.

[0064] When spot welding is required on the inner side of the wheel hub, the guide block 403 can be moved to the middle of the fixed plate 6, and the welding head 404 can be rotated counterclockwise so that the welding end of the welding head 404 corresponds to the inner side of the wheel hub, and the height adjustment push rod 401 is turned on to adjust the corresponding height, and the fixed plate 6 is driven to rotate again to complete the spot welding process on the inner side of the wheel hub;

[0065] When the device is in the inner support state, that is, when spot welding is performed on the outer side of the wheel hub, the air pump 10 can be turned off, the exhaust valve 505 can be opened, and the intake valve 504 can be closed. At this time, the air inside the air storage pipe 501 can be discharged through the air delivery pipe 506 and enter the inner support assembly 12 through the No. 2 three-way valve 507, and the limit spring 5010 automatically resets, driving the piston rod 509 to move upward, and finally driving the movable plate 8 and the inner support assembly 12 to move upward;

[0066] When the device is in the inner support state, the movable plate 8 moves upward, which can drive the inner support assembly 12 to move upward. At the same time, all the compressed air in the power assembly 5 can be released to the inside of the air inlet chamber 122 through the No. 2 three-way valve 507, and enter the inside of the inner support tube 123. As all the air enters, the multiple limit plates 124 are thrusted by the air. At this time, the return spring 126 is compressed and drives the multiple inner support heads 125 to move toward the outer side of the inner support tube 123 until the end face of the inner support head 125 contacts the inner side of the wheel hub. At this time, the multi-point support process of the inner side of the wheel hub can be completed.

[0067] When spot welding is required on the outer side of the wheel hub, the device can be switched to the inner support state. At this time, the clamping device on the outside is released. The guide block 403 can be moved to the outer side close to the fixed plate 6, and the welding head 404 can be rotated clockwise so that the welding end of the welding head 404 corresponds to the outer side of the wheel hub, and the spot welding process of the outer side of the wheel hub is completed by the cooperation of the height adjustment push rod 401 and the fixed plate 6.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spot welding device for an automobile wheel hub, comprising a mounting frame (1), characterized in that: The bottom end of the mounting frame (1) is provided with an electric turntable (2), the rotating end of the electric turntable (2) is connected to the bottom end of the mounting frame (1), one end of the mounting frame (1) is fixedly mounted with a frame (3), the top end of the frame (3) is fixedly mounted with a welding assembly (4), the middle part of the mounting frame (1) is fixedly sleeved with a power assembly (5), the top end of the mounting frame (1) is fixedly mounted with a fixed plate (6), the top end of the fixed plate (6) is provided with slots (7) at equal axial intervals, the inside of the slots (7) is movably engaged with a clamping assembly (11), and the bottom end of the fixed plate (6) is provided with a movable plate (8), The clamping assembly (11) is mounted at an equal angle on the top of the movable plate (8); a fixing frame (9) is fixedly mounted on the bottom of the movable plate (8); an air pump (10) is fixedly mounted on the middle of the top of the mounting frame (1); an output end of the air pump (10) is connected to an input end of the power assembly (5); one end of the power assembly (5) is connected to the bottom of the fixing frame (9); an inner support assembly (12) is fixedly connected to the top of the power assembly (5); the inner support assembly (12) is fixedly sleeved with the middle of the movable plate (8); a through hole is opened in the middle of the fixing plate (6) for the inner support assembly (12) to move up and down; By inputting compressed gas into the interior of the power assembly (5), the clamping assembly (11) can be acted on and the inner support assembly (12) can be lowered while clamping the outer side surface of the wheel hub. By releasing the gas inside the power assembly (5), the clamping assembly (11) can be automatically reset to release the external clamping and the inner support assembly (12) can be automatically raised, thus completing the inner support process.

2. The automobile wheel hub spot welding device according to claim 1, characterized in that: The welding assembly (4) comprises a height-adjusting push rod (401), the bottom end of the height-adjusting push rod (401) being connected to the top end of the frame (3), an extended guide rail (402) being fixedly mounted on the output end of the height-adjusting push rod (401), and a guide block (403) being movably clamped inside the extended guide rail (402).

3. The automobile wheel hub spot welding device according to claim 2, characterized in that: A welding box (405) is fixedly mounted on the top end of the guide block (403), and a welding head (404) is mounted on the bottom end of the guide block (403) via a movable shaft, and the welding head (404) rotates relative to the guide block (403).

4. The automobile wheel hub spot welding device according to claim 1, characterized in that: The power assembly (5) comprises an air storage pipe (501), the outer side surface of the air storage pipe (501) is fixedly sleeved with the mounting frame (1), a No. 1 three-way valve (502) is fixedly mounted at the bottom end of the air storage pipe (501), the bottom end of the No. 1 three-way valve (502) is connected to the output end of the air pump (10), a piston plate (508) is movably sleeved inside the air storage pipe (501), a piston rod (509) is fixedly mounted at the top end of the piston plate (508), the top end of the piston rod (509) passes through the top end of the air storage pipe (501) and is connected to the middle part of the bottom end of the fixing frame (9).

5. The automobile wheel hub spot welding device according to claim 4, characterized in that: The outer side surface of the piston rod (509) is movably sleeved with a limit spring (5010), and the upper and lower ends of the limit spring (5010) are respectively connected to the top of the inner cavity of the gas storage pipe (501) and the top of the piston plate (508), and the front and rear sides of the outer side surface of the gas storage pipe (501) near the top are fixedly connected to an intake valve (504), and the front and rear sides of the outer side surface of the gas storage pipe (501) are fixedly connected to an exhaust valve (505) located above the intake valve (504).

6. The automobile wheel hub spot welding device according to claim 5, characterized in that: The front and rear ends of the No. 1 three-way valve (502) are both fixedly connected to an air guide pipe (503), the other end of the air guide pipe (503) is connected to an air intake valve (504), the other end of the air exhaust valve (505) is both fixedly connected to an air supply pipe (506), a No. 2 three-way valve (507) is fixedly connected between the two air supply pipes (506), the top end of the No. 2 three-way valve (507) is connected to the bottom end of the inner support assembly (12), the air intake valve (504) and the air exhaust valve (505) are both one-way valves, and the directions of the valves are inward conduction and outward blockage and outward conduction and inward blockage, respectively.

7. The automobile wheel hub spot welding device according to claim 1, characterized in that: The clamping assembly (11) comprises a clamping block (111), the clamping block (111) being movably clamped to the clamping slot (7), a clamping plate (112) being fixedly mounted on the top end of the clamping block (111), and a first fixing seat (113) being fixedly mounted on the bottom end of the clamping block (111).

8. The automobile wheel hub spot welding device according to claim 7, characterized in that: One end of the first fixed seat (113) away from the clamping block (111) is movably connected to a connecting rod (115) via a rotating shaft, and one end of the connecting rod (115) away from the first fixed seat (113) is movably connected to a second fixed seat (114) via a rotating shaft, and the bottom end of the second fixed seat (114) is connected to the top end of the movable plate (8).

9. The automobile wheel hub spot welding device according to claim 6, characterized in that: The inner support assembly (12) comprises a movable tube (121), the outer side surface of the movable tube (121) being fixedly sleeved with the movable plate (8), an air intake cavity (122) being provided inside the movable tube (121), the top end of the air intake cavity (122) being fixedly connected to an inner support tube (123), and the top end of the inner support tube (123) being fixedly connected to a pressure relief valve (127).

10. The automobile wheel hub spot welding device according to claim 9, characterized in that: An inner support head (125) is movably sleeved on the outer side surface of the inner support tube (123) at equal axial intervals, a rear end of the inner support head (125) is fixedly connected to a limit plate (124) located inside the inner support tube (123), and a return spring (126) is movably sleeved on the outer side surface of the inner support head (125), and left and right ends of the return spring (126) are respectively connected to one end of the inner support tube (123) and one end of the limit plate (124).

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