Wheel hub welding device

Abstract

The present invention discloses a wheel hub welding device, which belongs to the field of wheel hub welding technology, and includes a workbench, a welding assembly is arranged on the workbench, a rotating seat is rotatably connected to the workbench, a rim fixing part and a spoke fixing part are arranged inside the rotating seat; the rim fixing part includes a plurality of sliding seats, a first support plate is arranged on the side wall of the sliding seat, a top rod is fixed on the sliding seat, a sliding column is slid inside the rotating seat, and a first thick column is arranged on the outer wall of the sliding column. The present invention realizes the precise positioning and stable fixing of the rim through the synergistic effect of the sliding seat and the first support plate, ensures that the rim is closely attached to the surface of the rotating seat, and provides a stable foundation for subsequent welding. At the same time, through the linkage mechanism of the sliding column and the carrier, and the cooperation of the sliding rod and the second support plate, the spoke is quickly and effectively fixed, and the spoke can be accurately transferred to the welding position relative to the rim in a fixed state, thereby improving the accuracy of the welding position.

Description

Technical Field

[0001] The invention relates to a wheel hub welding device, belonging to the technical field of wheel hub welding. Background Art

[0002] In the wheel manufacturing industry, traditional welding processes face many challenges, especially in the precise positioning and firm fixation of the rim and spokes. Due to the complex structure of the wheel, the welding position of the rim and spokes must meet extremely high precision requirements to ensure the overall strength and balance of the wheel. However, traditional fixing methods often rely on manual adjustment and a large number of fixtures, which are not only cumbersome and inefficient, but also difficult to ensure the accuracy and consistency of each fixation, which can easily lead to welding position deviations and affect the welding quality and performance of the wheel.

[0003] In addition, after welding, the wheel hub disassembly process is also cumbersome, which can easily cause damage or deformation to the wheel hub, increasing the difficulty and cost of subsequent processing. Therefore, how to design a welding device that can achieve fast and accurate positioning and stable fixation of the rim and spokes, and facilitate the disassembly of the wheel hub after welding, has become a technical problem that needs to be solved urgently in the wheel hub manufacturing industry. Summary of the invention

[0004] The object of the present invention is to provide a wheel hub welding device to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a wheel hub welding device, comprising a workbench, a welding assembly is arranged on the workbench through a support arm, a rotating seat is rotatably connected to the workbench, the upper surface of the rotating seat extends to the outside of the workbench, and a rim fixing member for fixing a rim and a spoke fixing member for fixing a spoke are arranged inside the rotating seat;

[0006] Rim fixings include:

[0007] A plurality of sliding seats, wherein the plurality of sliding seats are evenly distributed on the rotating seat around the axis of the rotating seat, and the lower end of each sliding seat is slidably connected to a sliding groove provided in the rotating seat through a first spring;

[0008] A first support plate, which is arranged on a side wall of the sliding seat and is used to press against an inner wall of the rim;

[0009] Among them, a push rod is fixed on the sliding seat, a sliding column is slid inside the rotating seat, a first thick column is arranged on the outer wall of the sliding column, a first inclined column is arranged between the bottom of the first thick column and the outer wall of the sliding column, and the push rod is slidably connected to the sliding column, the first thick column and the first inclined column.

[0010] Preferably, the rim fixing member further comprises:

[0011] A rotating groove, wherein the rotating groove is provided on a side wall of the sliding seat;

[0012] A connecting rod, one end of which is rotatably connected to the inside of the rotating groove, and the other end of which is hinged to the side wall of the first support plate, and the end of the connecting rod located in the rotating groove is always higher than the end connected to the first support plate;

[0013] An arc-shaped reset leaf spring, the reset leaf spring being arranged between the sliding seat and the first support plate, one end of the reset leaf spring being hinged on the side wall of the first support plate, the other end of the reset leaf spring being slidably connected to the side wall of the first support plate, and the middle part of the reset leaf spring being against the side wall of the sliding seat;

[0014] When the sliding seat slides away from the center of the rotating seat, the first support plate is pressed against the inner wall of the rim, and at the same time, the first support plate presses the rim downward.

[0015] Preferably, a surface of the first support plate pressed against the inner wall of the rim is covered with a rubber layer for contacting the inner wall of the rim.

[0016] Preferably, the spoke fixing member comprises:

[0017] A carrier, the carrier is fixedly mounted on the upper end of the sliding column, the carrier is provided with an annular platform for supporting the spokes, and a convex block inserted into the axle mounting portion of the spoke center is fixed in the middle of the annular platform;

[0018] A plurality of sliding rods, wherein the plurality of sliding rods are slidably connected to the protrusion via a second spring, and the plurality of sliding rods are evenly distributed around the center of the carrier;

[0019] A second support plate, the second support plate is fixed to an end of the sliding rod away from the center of the carrier and is used to press the inner wall of the axle mounting portion at the center of the spoke;

[0020] Among them, an inner column is fixed inside the vertical column, the upper end of the inner column passes through the sliding column and the carrier in sequence, a second thick column is arranged on the outer wall of the inner column, a third inclined column is arranged between the upper part of the second thick column and the outer wall of the inner column, and the end of the sliding rod is slidably connected to the inner column, the second thick column and the third inclined column.

[0021] Preferably, the inner column is rotatably connected to the inside of the vertical column, a sink groove opened along the length direction of the second thick column is provided on the side wall of the second thick column, and a second inclined column is provided between the top of the first thick column and the outer wall of the sliding column.

[0022] Preferably, a plurality of positioning columns for inserting into the bolt holes of the wheel spokes are fixed on the annular carrier.

[0023] Preferably, a ring block is fixed on the rotating seat, and the ring block is sleeved on the sliding column. A plurality of limiting rods are provided on the side wall of the sliding column, and a limiting groove for the limiting rods to slide is provided on the inner wall of the ring block.

[0024] Preferably, a driving assembly is arranged inside the rotating seat, and the driving assembly includes a lifting frame and an electric push rod. The lifting frame is fixed to the bottom of the sliding column, the electric push rod is arranged in the rotating seat, and the output shaft of the electric push rod is connected to the lifting frame.

[0025] Compared with existing technologies:

[0026] The present invention realizes accurate positioning and firm fixation of the rim through the synergistic effect of the sliding seat and the first support plate, ensuring that the rim is in close contact with the surface of the rotating seat, providing a stable foundation for subsequent welding. At the same time, through the linkage mechanism of the sliding column and the carrier, and the cooperation of the sliding rod and the second support plate, the spokes can be quickly and effectively fixed, and the spokes can be accurately moved to the welding position relative to the rim in a fixed state. This design not only simplifies the preparation process before welding and reduces manual intervention, but also greatly improves the accuracy of the welding position, reduces welding quality problems caused by position deviation, and the relative position of the spokes and the rim can be fine-tuned in a fixed state, further meeting the needs of high-precision welding.

[0027] The present invention greatly facilitates the disassembly process of the wheel hub after welding through the rotatable inner column and the sink groove on the second thick column. That is, the rotation of the inner column enables the sink groove to align with the sliding rod, and the sliding rod automatically sinks into the sink groove by the elastic force of the second spring, thereby quickly releasing the fixing of the second support plate to the wheel spoke, and realizing the rapid separation between the wheel spoke and the carrier. At the same time, through the sliding column, the top rod slides under the pressure of the first spring, thereby releasing the fixing of the first support plate to the wheel rim, and the entire wheel hub can be easily removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic structural diagram of the rotating seat and the rim fixing member of the present invention.

[0030] Figure 3 It is an overall cross-sectional view of the rotating seat of the present invention.

[0031] Figure 4 It is a cross-sectional view of the sliding seat, the first support plate and the connecting rod of the present invention.

[0032] Figure 5 It is a cross-sectional exploded view of the sliding seat, the first support plate and the connecting rod of the present invention.

[0033] Figure 6It is a cross-sectional view of the upright column, sliding column and inner column of the present invention.

[0034] Figure 7 For the present invention Figure 6 Enlarged view of point A.

[0035] Figure 8 This is a state diagram of the rim and the spoke of the present invention when they are fixed in the welding position.

[0036] Fig. 9 This is a cross-sectional view of the first support plate of the present invention when it is pressed against the inner wall of the rim.

[0037] In the figure:

[0038] 1. Workbench, 2. Support arm, 3. Welding assembly;

[0039] 4. Rotating seat, 401, slideway, 402, column;

[0040] 5. rim fixing member, 501. sliding seat, 502. first support plate, 503. rotating groove, 504. connecting rod, 505. reset leaf spring, 506. push rod, 507. first spring;

[0041] 6. spoke fixing member, 601. carrier, 6011. annular carrier, 6012. convex block, 602. sliding rod, 603. second support plate, 604. second spring;

[0042] 7, sliding column, 701, first thick column, 702, first oblique column, 703, second oblique column;

[0043] 8. Driving assembly, 801, lifting frame, 802, electric push rod;

[0044] 9, inner column, 901, second thick column, 902, third oblique column, 903, sink;

[0045] 10. Positioning column;

[0046] 11. ring block, 12. limiting rod, 13. limiting groove;

[0047] 14. Motor. DETAILED DESCRIPTION

[0048] The present invention is described below with specific embodiments, but they are not intended to be limiting of the invention.

[0049] Embodiment 1

[0050] like Figure 1-Figure 9As shown, in this embodiment, a wheel hub welding device is provided, including a workbench 1, on which a welding assembly 3 is arranged through a support arm 2, and a rotating seat 4 is rotatably connected to the workbench 1, the upper surface of the rotating seat 4 extends to the outside of the workbench 1, and the upper surface of the rotating seat 4 is used to support the rim to be welded, and the interior of the rotating seat 4 is provided with a rim fixing member 5 for fixing the rim and a spoke fixing member 6 for fixing the spoke; the rim fixing member 5 includes a plurality of sliding seats 501, and the plurality of sliding seats 501 are evenly distributed on the rotating seat 4 around the axis of the rotating seat 4, and the lower end of each sliding seat 501 is slidably connected to a slide groove 401 opened in the rotating seat 4 through a first spring 507, and the slide grooves 401 are evenly distributed around the axis of the rotating seat 4, and the extension line of the slide groove 401 intersects with the axis of the rotating seat 4, as shown in FIG. Figure 3 As shown, the first spring 507 is arranged between the sliding seat 501 and the sliding groove 401, and the first spring 507 can press the sliding seat 501 toward the center of the rotating seat 4; a first support plate 502 for pressing against the inner wall of the rim is arranged on the side wall of the sliding seat 501, and a surface of the first support plate 502 pressing against the inner wall of the rim is covered with a rubber layer for contacting the inner wall of the rim, and the surface of the rubber layer is provided with anti-skid patterns, which can increase the friction with the inner wall of the rim, and can stably press the rim downward, thereby ensuring the accurate positioning and fixation of the rim; when the sliding seat 501 slides away from the center of the rotating seat 4, the first support plate 502 presses against the inner wall of the rim On the inner wall of the rim, the first support plate 502 presses the rim downward at the same time; wherein, a push rod 506 is fixed on the sliding seat 501, a column 402 is arranged inside the rotating seat 4, a sliding column 7 is slidably sleeved on the column 402, the central axis of the sliding column 7 coincides with the axis of the rotating seat 4, the sliding column 7 can slide back and forth along the axis of the rotating seat 4, the upper end of the sliding column 7 extends upward to the outside of the rotating seat 4, a first thick column 701 is arranged on the outer wall of the sliding column 7, a first inclined column 702 is arranged between the lower part of the first thick column 701 and the outer wall of the sliding column 7, and the push rod 506 is slidably connected to the sliding column 7, the first thick column 701 and the first inclined column 702.

[0051] When placing the wheel rim, slide the slide post 7 so that the end of the push rod 506 is pressed against the slide post 7 located below the first thick post 701. Under the pressure of the first spring 507, the plurality of slide seats 501 are in a gathered state close to the axis of the rotating seat 4.

[0052] When fixing the rim, slide the slide post 7 downward, and the end of the push rod 506 slides from the slide post 7 along the first inclined column 702 to the first thick column 701. During this process, the push rod 506 slides against the sliding seat 501 to fix the rim.

[0053] In addition, a roller is disposed at one end of the push rod 506 away from the sliding seat 501 , and the roller rolls on the sliding column 7 , the first thick column 701 and the first inclined column 702 to reduce friction.

[0054] like Figure 3 As shown, in order to enable the slide column 7 to slide in the rotating seat 4, a driving assembly 8 is arranged inside the rotating seat 4, and the driving assembly 8 includes a lifting frame 801 and an electric push rod 802. The lifting frame 801 is fixed to the bottom of the slide column 7, and the electric push rod 802 is arranged in the rotating seat 4. The output shaft of the electric push rod 802 is connected to the lifting frame 801. During the telescopic movement, the output shaft of the electric push rod 802 controls the up and down sliding of the slide column 7 through the lifting frame 801.

[0055] The rim fixing member 5 further includes a rotation groove 503, which is formed on the side wall of the sliding seat 501, and each sliding seat 501 has at least two rotation grooves 503;

[0056] The interior of the rotating groove 503 is rotatably connected to a connecting rod 504, and the other end of the connecting rod 504 is hinged on the side wall of the first supporting plate 502. Figure 5 As shown, the top wall of the rotating groove 503 is inclined along the dotted line, and the top wall of the rotating groove 503 restricts the connecting rod 504. When the connecting rod 504 rotates upward and abuts against the top wall of the rotating groove 503, the connecting rod 504 cannot rotate upward any further, and one end of the connecting rod 504 located in the rotating groove 503 is always higher than the end connected to the first support plate 502.

[0057] An arc-shaped reset leaf spring 505 is provided between the sliding seat 501 and the first support plate 502. One end of the reset leaf spring 505 is hinged on the side wall of the first support plate 502, and the other end of the reset leaf spring 505 is slidably connected to the side wall of the first support plate 502. A roller is provided at the sliding end of the reset leaf spring 505. The roller rolls on the side wall of the first support plate 502 to reduce friction, and the middle part of the reset leaf spring 505 abuts against the side wall of the sliding seat 501.

[0058] like Figure 4 As shown, when the first support plate 502 is not acted upon by an external force, the return leaf spring 505 presses the first support plate 502 toward one side of the sliding seat 501, so that the connecting rod 504 rotates upward and then the connecting rod 504 abuts against the top wall of the rotating groove 503;

[0059] The process of fixing the rim is:

[0060] like Figure 1As shown, the rim is placed on the upper surface of the rotating seat 4, the sliding seat 501 is located in the rim, and the first support plate 502 is facing the inner wall of the rim, and the sliding seat 501 is slid synchronously, and each sliding seat 501 slides toward the center away from the rotating seat 4. At this time, the first support plate 502 is supported on the sliding seat 501 by the connecting rod 504, and the first support plate 502 slides toward the inner wall of the rim. When the first support plate 502 contacts the inner wall of the rim, the sliding seat 501 continues to slide, and the first support plate 502 presses against the inner wall of the rim. During the pressing process, the rim generates a reaction force on the first support plate 502. Under the interaction between the sliding seat 501 and the first support plate 502, the connecting rod 504 will rotate downward, that is, the first support plate 502 presses against the inner wall of the rim and also has a downward pressing force on the rim. When the rim is fixed, it can ensure that the rim is tightly attached to the upper surface of the rotating seat 4, and the rim is accurately positioned.

[0061] During the process of fixing the rim, the reset leaf spring 505 is deformed under the mutual compression of the sliding seat 501 and the first support plate 502. When the sliding seat 501 slides toward the center of the rotating seat 4, the first support plate 502 slides toward the side away from the inner wall of the rim. The first support plate 502 can be reset by the reset leaf spring 505, so that the connecting rod 504 remains in a state of resting against the top wall of the rotating groove 503 in a natural state.

[0062] like Figure 2 and Fig. 9 As shown, in order to prevent the sliding column 7 from rotating, a ring block 11 is fixed on the rotating seat 4, and the ring block 11 is sleeved on the sliding column 7. A plurality of limit rods 12 are provided on the side wall of the sliding column 7, and a limit groove 13 for the limit rod 12 to slide is provided on the inner wall of the ring block 11.

[0063] Embodiment 2

[0064] like Figure 6-Figure 9 As shown, on the basis of the first embodiment, in order to fix the spokes, the spoke fixing member 6 of this embodiment includes a carrier 601, the carrier 601 is fixedly mounted on the upper end of the sliding column 7, an annular carrier 6011 for supporting the spokes is provided on the carrier 601, a protrusion 6012 inserted into the spoke center axle mounting portion is fixed in the middle of the annular carrier 6011; a plurality of sliding rods 602 are slidably connected to the protrusion 6012 through a second spring 604, and the plurality of sliding rods 602 are evenly spaced around the center of the carrier 601. Distribution; a second support plate 603 is fixed to one end of the sliding rod 602 away from the center of the carrier 601, which is used to press the inner wall of the spoke center axle mounting part; wherein, an inner column 9 is fixed inside the column 402, and the upper end of the inner column 9 passes through the sliding column 7 and the carrier 601 in sequence, and a second thick column 901 is arranged on the outer wall of the inner column 9, and a third inclined column 902 is arranged between the upper part of the second thick column 901 and the outer wall of the inner column 9, and the end of the sliding rod 602 is slidably connected to the inner column 9, the second thick column 901 and the third inclined column 902.

[0065] The carrier 601 is fixed to the upper end of the sliding column 7. The carrier 601 can slide along with the sliding column 7. When the wheel spoke is placed on the carrier 601, the sliding column 7 is used to slide downward, and the sliding column 7, the carrier 601 and the wheel spoke slide downward synchronously. During the sliding process, the end of the sliding rod 602 contacts the second thick column 901 through the third inclined column 902. Under the pressure of the second thick column 901, the sliding rod 602 pushes the second support plate 603 outward, so that the second support plate 603 is pressed against the inner wall of the axle mounting part of the spoke center, so that the wheel spoke is fixed on the carrier 601.

[0066] In addition, a roller is provided at the end of the sliding rod 602, and the roller rolls on the inner column 9, the second thick column 901 and the third inclined column 902 to reduce friction.

[0067] The process of fixing the above-mentioned spokes on the carrier 601 is carried out synchronously with the process of fixing the rim on the rotating seat 4, and the first thick column 701 presses the push rod 506 to make the first support plate 502 fix the rim on the rotating seat 4, and when the end of the push rod 506 slides on the first thick column 701, the state of the first support plate 502 fixing the rim on the rotating seat 4 remains unchanged, and the second thick column 901 presses the sliding rod 602 to make the second support plate 603 fix the spokes on the carrier 601, and the state of the second support plate 603 fixing the spokes on the carrier 601 remains unchanged, so the carrier 601 can move the fixed spokes downward to the welding position opposite to the rim, thereby improving the welding accuracy, and according to the above-mentioned fixing structure, the welding position of the spokes and the rim can also be relatively adjusted.

[0068] After the spoke and the rim are fixed, the support arm 2 is used to move the welding assembly 3 so that the welding head of the welding assembly 3 is facing the connection position between the spoke and the rim, the welding assembly 3 is started, and the rotating seat 4 is rotated one circle at the same time, and the welding assembly 3 can weld the connection position between the spoke and the rim.

[0069] In addition, in order to drive the inner column 9 to rotate, a motor 14 is provided inside the rotating seat 4, and the output shaft of the motor 14 is meshedly connected with the lower end of the inner column 9 through gears.

[0070] like Fig. 9 As shown, in order to unify the angles at which the spokes are placed on the carrier 601 , a plurality of positioning posts 10 for inserting into the bolt holes of the spokes are fixed on the annular carrier 6011 .

[0071] Embodiment 3

[0072] like Figure 3 , Figure 6 and Figure 7As shown, on the basis of the second embodiment, in order to be able to remove the wheel hub after welding, the inner column 9 is rotatably connected to the inside of the column 402, and the side wall of the second thick column 901 is provided with a groove 903 opened along the length direction of the second thick column 901, and a second inclined column 703 is provided between the top of the first thick column 701 and the outer wall of the sliding column 7.

[0073] When fixing the spokes, the sinking groove 903 is staggered with the end of the sliding rod 602, and the second thick column 901 can normally press the end of the sliding rod 602 to achieve normal spoke fixing operation. When welding is completed, the inner column 9 is rotated to rotate the sinking groove 903 to face the sliding rod 602. The sliding rod 602 is pressed by the second spring 604, and its end will sink into the inside of the sinking groove 903, so that the second support plate 603 is no longer pressed against the inner wall of the axle mounting part of the spoke center. In this state, it slides downward. The sliding column 7 causes the push rod 506 to slide along the second inclined column 703 to the sliding column 7 located above the first thick column 701. At this time, the first support plate 502 is no longer pressed against the inner wall of the rim. The welded wheel hub can be removed at this time. After the wheel hub is removed, slide the sliding column 7 upward to reset it (the push rod 506 slides along the second inclined column 703 to the sliding column 7 located below the first thick column 701), and rotate the inner column 9 to reset it (the groove 903 and the sliding rod 602 are staggered) to facilitate welding of the next wheel hub.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A wheel hub welding device, comprising a workbench (1), wherein a welding assembly (3) is arranged on the workbench (1) via a support arm (2), and a rotating seat (4) is rotatably connected to the workbench (1), wherein the upper surface of the rotating seat (4) extends to the outside of the workbench (1), and wherein: A rim fixing part (5) and a spoke fixing part (6) are arranged inside the rotating seat (4); The wheel rim fixing member (5) comprises: A plurality of sliding seats (501), wherein the plurality of sliding seats (501) are evenly distributed on the rotating seat (4) around the axis of the rotating seat (4), and the lower end of each sliding seat (501) is slidably connected to a sliding groove (401) provided in the rotating seat (4) via a first spring (507); A first support plate (502), the first support plate (502) being arranged on a side wall of the sliding seat (501) and being used to press against an inner wall of the rim; A push rod (506) is fixed on the sliding seat (501), a column (402) is arranged inside the rotating seat (4), a sliding column (7) is slidably sleeved on the column (402), a first thick column (701) is arranged on the outer wall of the sliding column (7), a first inclined column (702) is arranged below the first thick column (701) and between the outer wall of the sliding column (7), and the push rod (506) is slidably connected to the sliding column (7), the first thick column (701) and the first inclined column (702); The spoke fixing member (6) comprises: A carrier (601), the carrier (601) being fixedly mounted on the upper end of the sliding column (7), the carrier (601) being provided with an annular carrier (6011) for supporting the spokes, the middle of the annular carrier (6011) being fixed with a protrusion (6012) inserted into the axle mounting portion at the center of the spokes; A plurality of sliding rods (602), wherein the plurality of sliding rods (602) are slidably connected to the protrusion (6012) via a second spring (604), and the plurality of sliding rods (602) are evenly distributed around the center of the carrier (601); A second support plate (603), the second support plate (603) being fixed to an end of the sliding rod (602) away from the center of the carrier (601) and used for pressing the inner wall of the axle mounting portion at the center of the spoke; An inner column (9) is fixed inside the upright column (402), the upper end of the inner column (9) passes through the sliding column (7) and the carrier (601) in sequence, a second thick column (901) is arranged on the outer wall of the inner column (9), a third inclined column (902) is arranged above the second thick column (901) and between the outer wall of the inner column (9), and the end of the sliding rod (602) is slidably connected to the inner column (9), the second thick column (901) and the third inclined column (902); The rim fixing member (5) further comprises: A rotating groove (503), wherein the rotating groove (503) is formed on a side wall of the sliding seat (501); A connecting rod (504), one end of the connecting rod (504) being rotatably connected to the inside of the rotating groove (503), the other end of the connecting rod (504) being hinged to the side wall of the first support plate (502), and the end of the connecting rod (504) located in the rotating groove (503) being always higher than the end connected to the first support plate (502); an arc-shaped reset leaf spring (505), the reset leaf spring (505) being arranged between the sliding seat (501) and the first support plate (502), one end of the reset leaf spring (505) being hinged on the side wall of the first support plate (502), the other end of the reset leaf spring (505) being slidably connected to the side wall of the first support plate (502), and the middle part of the reset leaf spring (505) being against the side wall of the sliding seat (501); When the sliding seat (501) slides away from the center of the rotating seat (4), the first support plate (502) is pressed against the inner wall of the rim, and at the same time, the first support plate (502) presses the rim downward.

2. A wheel hub welding device according to claim 1, characterized in that: A surface of the first support plate (502) pressed against the inner wall of the rim is covered with a rubber layer for contacting the inner wall of the rim.

3. A wheel hub welding device according to claim 1, characterized in that: The inner column (9) is rotatably connected to the inside of the upright column (402); a sink groove (903) is provided on the side wall of the second thick column (901) along the length direction of the second thick column (901); and a second inclined column (703) is provided between the top of the first thick column (701) and the outer wall of the sliding column (7).

4. A wheel hub welding device according to claim 1, characterized in that: A plurality of positioning columns (10) for being inserted into the bolt holes of the wheel spokes are fixed on the annular carrier (6011).

5. A wheel hub welding device according to claim 1, characterized in that: A ring block (11) is fixed on the rotating seat (4), and the ring block (11) is sleeved on the sliding column (7). A plurality of limit rods (12) are provided on the side wall of the sliding column (7), and a limit groove (13) for the limit rods (12) to slide is provided on the inner wall of the ring block (11).

6. A wheel hub welding device according to claim 1, characterized in that: A driving assembly (8) is arranged inside the rotating seat (4), and the driving assembly (8) comprises a lifting frame (801) and an electric push rod (802). The lifting frame (801) is fixed to the bottom of the sliding column (7), and the electric push rod (802) is arranged inside the rotating seat (4). The output shaft of the electric push rod (802) is connected to the lifting frame (801).

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