A steel wheel rim welding fixture

Abstract

The utility model relates to the technical field of rim welding fixture, especially a steel wheel rim welding fixture, including rim main part, bottom shell and apron, the apron is through the bolt of circumferential even distribution with the bottom shell upper end face detachable fastening and is connected, still include: six adjusting lever, the outer surface of rim main part is equipped with six clamping blocks, is equipped with the connecting portion between clamping block and adjusting lever, the downside of rim main part is equipped with support shell, is equipped with adjusting unit between support shell and six adjusting lever, the lifting plate, the upside of lifting plate is detachably installed with the positioning pin through the bolt, and the upside of lifting plate and support shell is equipped with lifting part. Through setting adjusting lever, clamping block, adjusting unit, can automatically adjust the position of multiple clamping blocks simultaneously, make six clamping blocks always constitute stable circumferential shape to adapt to multiple specifications rim, and improve the efficiency of rim installation, adopt screw gear drive simultaneously, improve the stability of clamping, improve the precision of welding.

Description

Technical Field

[0001] This utility model relates to the field of wheel rim welding fixture technology, and in particular to a steel wheel rim welding fixture. Background Technology

[0002] The rim (also known as the wheel rim) is the metal part around the wheel that mounts and supports the tire. Together with the spokes, it forms the wheel structure. The wheel is a rigid wheel that fixes the inner edge of the tire, supports the tire, and shares the load with the tire. In the manufacturing process of steel wheels, the welding of the rim and spokes is a key process, and its welding quality directly affects the overall strength and safety of the wheel.

[0003] In the prior art, according to Chinese patent application number 202420383041.2, a steel wheel rim welding fixture is disclosed, which includes a base, a mounting seat, a support frame, a first connecting frame, and a fixing ring. Two support frames are mounted on the base, and the first connecting frame is mounted on the upper part of the two support frames. The mounting seat is mounted on the lower part of the two support frames. A fixing ring for placing the wheel rim is mounted on both the first connecting frame and the mounting seat. By starting a fan, the harmful fumes generated during welding are drawn in through various holes in a diversion pipe. The harmful fumes are first filtered through a filter screen, and then collected from the diversion pipe into the mounting cabinet. The fan blows the filtered fumes outward, achieving the effect of removing the harmful fumes generated during welding.

[0004] In the prior art, according to Chinese patent application number 202420383041.2, a steel wheel rim welding fixture is disclosed. This fixture uses a first elastic element to press a clamping plate against the wheel rim. However, the device has multiple clamping plates in different positions, requiring operators to manipulate each plate individually, making simultaneous adjustment of their positions impossible and affecting installation efficiency. Furthermore, the elastic element is prone to vibration or external forces, leading to unstable clamping force and affecting welding accuracy. Therefore, we propose a steel wheel rim welding fixture to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies. For example, Chinese Patent Application No. 202420383041.2 discloses a steel wheel rim welding fixture, which uses a first elastic element to press a clamping plate against the rim. The device has multiple clamping plates in different positions, requiring operators to manipulate each plate individually, making simultaneous adjustment of their positions impossible and affecting installation efficiency. Furthermore, the elastic element is prone to vibration or external force, leading to unstable clamping force and affecting welding accuracy. Therefore, this utility model proposes a steel wheel rim welding fixture.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A steel wheel rim welding fixture is designed, comprising a rim body, a bottom shell, and a cover plate. The rim body is located within the space formed by the inner cavity of the bottom shell and the lower surface of the cover plate. A circular through hole A is provided at the center of the upper side of the cover plate. The rim body can slide inside the through hole A. The cover plate is detachably and securely connected to the upper end face of the bottom shell by circumferentially distributed bolts. The fixture also includes:

[0008] The wheel rim body has six adjusting rods and six clamping blocks on its outer surface. A connecting part is provided between the clamping blocks and the adjusting rods. The connecting part is used to connect the clamping blocks and the adjusting rods to realize the relative movement or fixation between the clamping blocks and the adjusting rods. A support shell is provided on the lower side of the wheel rim body and the support shell is detachably connected to the bottom shell. An adjusting unit is provided between the support shell and the six adjusting rods. The adjusting unit is used to drive the adjusting rods to move so that the clamping blocks can stably clamp the wheel rim bodies with different outer diameters.

[0009] The lifting plate is located in the space enclosed by the upper side of the support shell and the inner side of the wheel rim body. The upper side of the lifting plate is detachably installed with a positioning pin by bolts. The lifting plate and the upper side of the support shell are provided with a lifting part, which is used to drive the lifting plate to make precise displacement in the vertical direction.

[0010] Preferably, the connecting part includes a C-shaped mounting plate, and a mounting block is detachably mounted on the inner side of the C-shaped mounting plate by bolts. The mounting block is rigidly fixedly connected to the clamping block, and the C-shaped mounting plate is assembled and connected to the end face of the adjusting rod by a detachable connection structure.

[0011] By adopting the above mechanism, the connecting part serves as a force transmission intermediate between the clamping block and the adjusting rod, while allowing the clamping block to be quickly disassembled, replaced, and installed as needed, thus improving the applicability of the device.

[0012] Preferably, the mounting block has two positioning grooves on one side, and a positioning block slides inside the positioning groove. The positioning block is fixedly connected to the inner side of the C-shaped mounting plate.

[0013] By employing the aforementioned mechanism, the positioning block allows the mounting block to be precisely positioned inside the C-shaped mounting plate, enabling the mounting block to be quickly assembled relative to the C-shaped mounting plate.

[0014] Preferably, the adjustment unit includes a motor, an A-support cylinder slides on the outside of the adjustment rod, the A-support cylinder is assembled and connected to the lower side of the cover plate through a detachable connection structure, an A-bevel gear is installed on the motor shaft end, the A-bevel gear is rotatably connected to the inner side of the support shell, a transmission part is provided between the A-bevel gear and the adjustment rod, a positioning ring is installed on the outside of the motor, the positioning ring is assembled and connected to the inner side of the support shell through a detachable connection structure, and the motor is connected to the unit and the controller through wires.

[0015] By employing the aforementioned mechanism, the adjustment unit can adjust the position of the adjustment rod, thereby adjusting the clamping block and allowing it to clamp and fix wheel rim bodies of different sizes.

[0016] Preferably, the inner side of the A support cylinder is provided with two guide grooves, and a positioning strip slides inside the guide grooves. The positioning strip is fixedly connected to the adjusting rod.

[0017] By employing the aforementioned mechanism, the positioning bar provides radial limiting and axial guidance for the adjusting rod, thereby improving the movement accuracy and stability of the adjusting rod.

[0018] Preferably, the transmission unit includes a screw, with an A support block rotatably mounted near one end of the screw close to the support shell and a B support block rotatably mounted at the other end of the screw. A driving block is provided between the A support block and the B support block. A threaded hole is provided on one side of the driving block. The screw is connected to the inner side of the threaded hole via threaded engagement. An L-shaped driving plate is fixedly mounted on the upper side of the driving block. The L-shaped driving plate is assembled and connected to the lower side of the adjusting rod and the C-shaped mounting plate via a detachable connection structure. The A support cylinder is located inside the L-shaped driving plate. Six positioning holes are provided on the outer side of the support shell. The screw is rotatable inside the positioning holes. The A support block is assembled and connected to the inner side of the support shell via a detachable connection structure. The B support block is assembled and connected to the inner side of the bottom shell via a detachable connection structure. A B bevel gear is provided on one side of the A support block. The B bevel gear is mounted on the outer side of the screw. The A bevel gear and the B bevel gear are connected via tooth engagement.

[0019] By employing the above mechanism, the transmission unit converts the rotational motion of the motor shaft end into the linear displacement of the driving block, and allows multiple clamping blocks to move synchronously more stably.

[0020] Preferably, the lifting part includes a B support cylinder, an adjusting bolt is threadedly engaged on the inner side of the B support cylinder, an adjusting ring is coaxially fixedly connected to the upper outer end of the adjusting bolt, and the lifting plate is rotatably connected to the upper side of the adjusting ring.

[0021] By adopting the above mechanism, the lifting plate can move up and down mechanically on the upper side of the adjusting ring, and the lifting plate is not constrained in the circumferential direction during the position adjustment process, thus realizing the coordinated control of axial adjustment and circumferential degree of freedom.

[0022] Preferably, the bottom shell and the cover plate are detachably connected by bolts to a number of auxiliary blocks.

[0023] By employing the aforementioned mechanism, the auxiliary block can enhance the rigidity and stability of the connection between the bottom shell and the cover plate.

[0024] The steel wheel rim welding fixture proposed in this utility model has the following advantages:

[0025] 1. By setting adjustment rods, clamping blocks, and adjustment units, the positions of multiple clamping blocks can be automatically adjusted simultaneously, ensuring that the six clamping blocks always form a stable circumference, thus adapting to various specifications of wheel rims and improving the efficiency of wheel rim installation. At the same time, the use of screw and gear transmission improves the stability of clamping and enhances the precision of welding.

[0026] 2. By setting up a lifting plate and lifting part, the axial relative position of the wheel spokes and the main body of the wheel rim can be flexibly adjusted to meet the assembly requirements of different wheel structures; at the same time, the lifting plate can rotate freely on the upper side of the adjusting ring to ensure that the wheel spoke angle adjustment is not constrained by the circumference, further improving the accuracy of welding assembly.

[0027] 3. By setting up a connecting part, the clamping block can be replaced as needed, thereby adapting to different types of wheel rims and improving the applicability of the device.

[0028] 4. By setting auxiliary blocks, the rigidity and stability between the bottom shell and the cover plate are enhanced, thereby improving the stability of the device. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the front side of a steel wheel rim welding fixture proposed in this utility model;

[0030] Figure 2 The present utility model proposes Figure 1 A magnified three-dimensional structural diagram of a portion of area A in the middle;

[0031] Figure 3 This is a three-dimensional cross-sectional view of the upper side of a steel wheel rim welding fixture proposed in this utility model.

[0032] Figure 4 The present utility model proposes Figure 3 A magnified three-dimensional structural diagram of a portion of area B in the middle section;

[0033] Figure 5 The present utility model proposes Figure 3 A magnified three-dimensional structural diagram of a portion of the central C area;

[0034] Figure 6This is a front-section three-dimensional structural diagram of a steel wheel rim welding fixture proposed in this utility model;

[0035] Figure 7 The present utility model proposes Figure 6 A magnified three-dimensional structural diagram of a portion of the central D region;

[0036] Figure 8 The present utility model proposes Figure 6 A magnified three-dimensional structural diagram of a portion of the central E region;

[0037] Figure 9 The present utility model proposes Figure 6 A magnified three-dimensional structural diagram of a portion of the central F region;

[0038] Figure 10 The present utility model proposes Figure 6 A magnified three-dimensional structural diagram of a portion of the G region.

[0039] In the diagram: 1. Bottom shell; 2. Cover plate; 3. Adjusting rod; 4. Clamping block; 5. Connecting part; 51. C-shaped mounting plate; 52. Mounting block; 53. Positioning block; 6. Support shell; 7. Adjusting unit; 71. Motor; 72. A support cylinder; 73. Transmission part; 7301. Screw; 7302. Support block; 7303. B support block; 7304. Drive block; 7305. L-shaped drive plate; 74. Positioning ring; 75. Positioning strip; 8. Lifting plate; 9. Lifting part; 91. B support cylinder; 92. Adjusting bolt; 93. Adjusting ring; 10. Positioning pin; 11. Auxiliary block. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0041] Reference Figure 1-10 A steel wheel rim welding fixture includes a rim body, a bottom shell 1, and a cover plate 2. The rim body is located in the space formed by the inner cavity of the bottom shell 1 and the lower surface of the cover plate 2. A circular through hole A is provided at the center of the upper side of the cover plate 2. The rim body can slide inside the through hole A. The cover plate 2 is detachably fastened to the upper end face of the bottom shell 1 by bolts evenly distributed around the circumference. Several auxiliary blocks 11 are detachably connected between the bottom shell 1 and the cover plate 2 by bolts. The auxiliary blocks 11 are set as structural reinforcements in a designated assembly area between the upper end face of the bottom shell 1 and the lower surface of the cover plate 2 to enhance the rigidity and stability between the bottom shell 1 and the cover plate 2. The fixture also includes: six adjusting rods 3 and a lifting plate 8.

[0042] The outer surface of the rim body is provided with six clamping blocks 4. The clamping blocks 4 can form a tight fit with the outer circumferential surface of the rim body, thereby better clamping and fixing the rim body. A connecting part 5 is provided between the clamping blocks 4 and the adjusting rod 3. The connecting part 5 is used to connect the clamping blocks 4 and the adjusting rod 3, and to realize the relative movement or fixation between the clamping blocks 4 and the adjusting rod 3, so as to transmit the position adjustment action of the adjusting rod 3 to the clamping blocks 4.

[0043] The connecting part 5 includes a C-shaped mounting plate 51. A mounting block 52 is detachably mounted on the inner side of the C-shaped mounting plate 51 by bolts. Two positioning grooves are provided on one side of the mounting block 52. A positioning block 53 slides inside the positioning groove. The positioning block 53 is fixedly connected to the inner side of the C-shaped mounting plate 51. The positioning block 53 allows for precise positioning between the mounting block 52 and the C-shaped mounting plate 51, ensuring that the mounting position of the mounting block 52 relative to the C-shaped mounting plate 51 is fixed and that the mounting block 52 can be quickly assembled. The mounting block 52 is rigidly fixedly connected to the clamping block 4. The C-shaped mounting plate 51 is assembled and connected to the end face of the adjusting rod 3 through a detachable connection structure, thus forming a force transmission intermediate between the clamping block 4 and the adjusting rod 3. This ensures that the position adjustment action of the adjusting rod 3 is accurately transmitted to the clamping block 4, driving the clamping block 4 to achieve displacement to adapt to different sizes of wheel rim bodies. At the same time, the quick assembly of the mounting block 52 allows personnel to quickly replace clamping blocks 4 of different shapes as needed, thereby clamping different types of wheel rim bodies.

[0044] A support shell 6 is provided on the lower side of the rim body and the support shell 6 is detachably connected to the bottom shell 1. An adjustment unit 7 is provided between the support shell 6 and the six adjustment rods 3. The adjustment unit 7 is used to drive the adjustment rods 3 to move synchronously along a preset trajectory, thereby changing the contact position and clamping force between the clamping block 4 and the outer circumferential surface of the rim body, and stably clamping and fixing the rim body with different outer diameters.

[0045] The adjustment unit 7 includes a motor 71. An A support cylinder 72 slides on the outside of the adjustment rod 3. The A support cylinder 72 guides the adjustment rod 3 radially and limits its axial movement. Two guide grooves are provided on the inner side of the A support cylinder 72. A positioning strip 75 slides on the inner side of the guide grooves. The positioning strip 75 is fixedly connected to the adjustment rod 3. The positioning strip 75 limits the adjustment rod 3 radially and guides it axially relative to the A support cylinder 72, ensuring that the adjustment rod 3 only moves accurately along the preset axial direction. At the same time, it constrains its radial swing and circumferential rotation, improving the motion accuracy and stability of the adjustment rod 3 during the position adjustment process. The A support cylinder 72 and the lower side of the cover plate 2 are assembled and connected by a detachable connection structure.

[0046] A bevel gear A is mounted on the shaft end of motor 71. The bevel gear A is rotatably connected to the inner side of support shell 6. A transmission part 73 is provided between the bevel gear A and the adjusting rod 3. A positioning ring 74 is mounted on the outer side of motor 71. The positioning ring 74 is assembled and connected to the inner side of support shell 6 through a detachable connection structure to ensure the axial and radial positioning accuracy of motor 71. Motor 71 is connected to the unit and controller through wires. Motor 71 drives the bevel gear A to rotate. Then, the transmission part 73 converts the rotational motion of bevel gear A into the directional displacement of adjusting rod 3, thereby driving adjusting rod 3 to adjust the position of clamping block 4, realizing the function of automatic clamping, and improving the convenience and automation level of device operation.

[0047] The transmission unit 73 includes a screw 7301. A support block 7302 rotates at one end of the screw 7301 near the support shell 6, and a support block 7303 rotates at the other end of the screw 7301. The support blocks 7302 and 7303 support and position the screw 7301, making the rotation of the screw 7301 more stable. A driving block 7304 is provided between the support blocks 7302 and 7303. A threaded hole is provided on one side of the driving block 7304. The screw 7301 is connected to the inner side of the threaded hole through threaded engagement, thereby converting the rotational motion of the screw 7301 into the linear displacement of the driving block 7304.

[0048] An L-shaped drive plate 7305 is fixedly installed on the upper side of the drive block 7304. The L-shaped drive plate 7305 is assembled and connected to the lower side of the adjusting rod 3 and the C-shaped mounting plate 51 through a detachable connection structure. The L-shaped drive plate 7305 positions the drive block 7304 to prevent the drive block 7304 from rotating and to allow the drive block 7304 to move only in a straight line. At the same time, the L-shaped drive plate 7305 allows the drive block 7304 to move along with the adjusting rod 3 and the clamping block 4. The A support cylinder 72 is located inside the L-shaped drive plate 7305.

[0049] The outer side of the support shell 6 is provided with six positioning holes. The screw 7301 can rotate inside the positioning holes. The positioning holes provide axial positioning and circumferential constraint for the screw 7301, making the rotation of the screw 7301 more stable. The A support block 7302 is assembled and connected to the inner side of the support shell 6 through a detachable connection structure. The B support block 7303 is assembled and connected to the inner side of the bottom shell 1 through a detachable connection structure.

[0050] A bevel gear B is provided on one side of support block 7302. Bevel gear B is installed on the outside of screw 7301. Bevel gear A and bevel gear B are connected by tooth meshing transmission. Bevel gear A is driven to rotate by motor 71. Then, through the meshing transmission between bevel gear A and bevel gear B, the rotational power of bevel gear A is transmitted to bevel gear B, which in turn drives screw 7301 to rotate. By controlling the rotational movement of screw 7301, drive block 7304 to move axially along screw 7301. Through L-shaped drive plate 7305, drive adjusting rod 3 to achieve precise position adjustment, allowing adjusting rod 3 to move together with clamping block 4, thereby clamping and positioning wheel rim bodies of different sizes. At the same time, because it is connected by gear meshing transmission, the six clamping blocks 4 can be adjusted and moved synchronously, so that the six clamping blocks 4 can always form a circumference when adjusting, thus clamping and fixing the wheel rim body faster and more stably.

[0051] The lifting plate 8 is located in the space enclosed by the upper side of the support shell 6 and the inner side of the rim body. The upper side of the lifting plate 8 is detachably installed with a positioning pin 10 by bolts. The positioning pin 10 is used to accurately position the center component of the spoke, so that the spoke is assembled on the lifting plate 8 in a center-positioned state. The lifting plate 8 and the upper side of the support shell 6 are provided with a lifting part 9. The lifting part 9 is used to drive the lifting plate 8 to make precise displacement in the vertical direction, thereby adjusting the axial relative position of the spoke and the rim body to achieve precise assembly of the spoke and the rim.

[0052] The lifting unit 9 includes a B support cylinder 91. An adjusting bolt 92 is threadedly engaged on the inner side of the B support cylinder 91. An adjusting ring 93 is coaxially fixedly connected to the upper outer end of the adjusting bolt 92. The lifting plate 8 is rotatably connected to the upper side of the adjusting ring 93, forming an axial position adjustment and circumferential free rotation mechanism for the lifting plate 8. Rotating the adjusting ring 93 drives the adjusting bolt 92 to rotate around its own axis. The rotational motion is converted into axial displacement of the adjusting bolt 92 using the threaded engagement transmission principle, thereby pushing the support cylinder and its connected components to move precisely axially. Simultaneously, the lifting plate 8 can be adjusted by the adjusting ring 93. The upper side can rotate freely to ensure that it is not constrained in the circumferential direction during the position adjustment process, so as to achieve coordinated control of axial adjustment and circumferential degree of freedom. After the rim body is fixed, the spokes are installed on the lifting plate 8 through the positioning pin 10. Then the angle of the spokes is adjusted. After the angle is adjusted, the spokes are held and the adjusting ring 93 is rotated. The adjusting ring 93 will rotate in the B support cylinder 91 with the adjusting bolt 92, so that the adjusting ring 93 moves up and down with the lifting plate 8, thereby adjusting the position between the rim body and the spokes. Then welding is performed so that the device can adapt to different types of wheels.

[0053] The bottom shell 1 and the cover plate 2 constitute a processing body. The rim body is horizontally fixed inside the processing body. Then, welding is performed automatically by the device or manually. Under the action of gravity, the probability of welding slag remaining on the rim body is reduced. At the same time, according to the welding process, the relative clamping position of the rim body and the position of the lowest end of the lifting plate 8 are adjusted, that is, the height of the processing body is adjusted. When double-sided welding is required, the lifting plate 8 needs to be able to lower the lower side of the rim body to weld the inside of the rim body and the spokes.

[0054] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation on this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components. For those skilled in the art, the specific meaning of the above terms in this patent can be understood according to the specific circumstances.

[0055] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A steel wheel rim welding fixture, comprising a rim body, a bottom shell (1), and a cover plate (2), wherein the rim body is located within the space formed by the inner cavity of the bottom shell (1) and the lower surface of the cover plate (2), a circular through hole A is provided at the center of the upper side of the cover plate (2), the rim body is slidably slidable within the through hole A, and the cover plate (2) is detachably and fastened to the upper end face of the bottom shell (1) by circumferentially distributed bolts, characterized in that, Also includes: Six adjusting rods (3), six clamping blocks (4) are provided on the outer surface of the rim body, and a connecting part (5) is provided between the clamping block (4) and the adjusting rod (3). The connecting part (5) is used to connect the clamping block (4) and the adjusting rod (3). A support shell (6) is provided on the lower side of the rim body and the support shell (6) is detachably connected to the bottom shell (1). An adjusting unit (7) is provided between the support shell (6) and the six adjusting rods (3). The adjusting unit (7) is used to drive the adjusting rod (3) to move along the rim body so that the clamping block (4) can stably clamp the rim body with different outer diameters. The lifting plate (8) is located in the space enclosed by the upper side of the support shell (6) and the inner side of the rim body. The upper side of the lifting plate (8) is detachably installed with a positioning pin (10) by bolts. The lifting plate (8) and the upper side of the support shell (6) are provided with a lifting part (9). The lifting part (9) is used to drive the lifting plate (8) to make precise displacement in the vertical direction.

2. The steel wheel rim welding fixture according to claim 1, characterized in that, The connecting part (5) includes a C-shaped mounting plate (51). An mounting block (52) is detachably mounted on the inner side of the C-shaped mounting plate (51) by bolts. The mounting block (52) is rigidly fixedly connected to the clamping block (4). The C-shaped mounting plate (51) is assembled and connected to the end face of the adjusting rod (3) by a detachable connection structure.

3. A steel wheel rim welding fixture according to claim 2, characterized in that, The mounting block (52) has two positioning grooves on one side, and a positioning block (53) slides inside the positioning groove. The positioning block (53) is fixedly connected to the inside of the C-shaped mounting plate (51).

4. A steel wheel rim welding fixture according to claim 2, characterized in that, The adjustment unit (7) includes a motor (71), an A support cylinder (72) that slides on the outside of the adjustment rod (3), the A support cylinder (72) and the lower side of the cover plate (2) are assembled and connected by a detachable connection structure, an A bevel gear is installed on the shaft end of the motor (71), the A bevel gear is rotatably connected to the inside of the support shell (6), a transmission part (73) is provided between the A bevel gear and the adjustment rod (3), a positioning ring (74) is installed on the outside of the motor (71), the positioning ring (74) and the inside of the support shell (6) are assembled and connected by a detachable connection structure, and the motor (71) is connected to the unit and the controller through a wire.

5. A steel wheel rim welding fixture according to claim 4, characterized in that, The A support cylinder (72) has two guide grooves on its inner side, and a positioning strip (75) slides on the inner side of the guide groove. The positioning strip (75) is fixedly connected to the adjusting rod (3).

6. A steel wheel rim welding fixture according to claim 4, characterized in that, The transmission part (73) includes a screw (7301), with an A support block (7302) rotatably mounted at one end of the screw (7301) near the support shell (6), and a B support block (7303) rotatably mounted at the other end of the screw (7301). A driving block (7304) is provided between the A support block (7302) and the B support block (7303). A threaded hole is provided on one side of the driving block (7304), and the screw (7301) is connected to the inner side of the threaded hole through threaded engagement. An L-shaped driving plate (7305) is fixedly mounted on the upper side of the driving block (7304). The L-shaped driving plate (7305) is connected to the lower side of the adjusting rod (3) and the C-shaped mounting plate (5). 1) The components are assembled and connected by a detachable connection structure. The A support cylinder (72) is located inside the L-shaped drive plate (7305). The outer side of the support shell (6) is provided with six positioning holes. The screw (7301) can rotate inside the positioning holes. The A support block (7302) is assembled and connected to the inner side of the support shell (6) by a detachable connection structure. The B support block (7303) is assembled and connected to the inner side of the bottom shell (1) by a detachable connection structure. The A support block (7302) is provided with a B bevel gear on one side. The B bevel gear is installed on the outer side of the screw (7301). The A bevel gear and the B bevel gear are connected by tooth meshing transmission.

7. A steel wheel rim welding fixture according to claim 1, characterized in that, The lifting part (9) includes a B support cylinder (91), and an adjusting bolt (92) is driven by thread engagement on the inner side of the B support cylinder (91). An adjusting ring (93) is coaxially fixedly connected to the upper outer end of the adjusting bolt (92). The lifting plate (8) is rotatably connected to the upper side of the adjusting ring (93).

8. A steel wheel rim welding fixture according to claim 1, characterized in that, Several auxiliary blocks (11) are detachably connected between the bottom shell (1) and the cover plate (2) by bolts.

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