Auxiliary device for hub manufacturing and welding

Abstract

The auxiliary device for hub manufacturing and welding comprises a bearing plate used for containing a rim, a circular truncated cone is coaxially and fixedly connected to the middle of the top face of the bearing plate, and a plurality of transverse rods are arranged on the top face of the circular truncated cone in the circumferential direction; the transverse rods extend in the radial direction of the circular truncated cone, and the transverse rods are rotationally connected with the top face of the circular truncated cone with the axis of the circular truncated cone as the center; positioning columns are arranged on the multiple transverse rods and are parallel to the axis of the circular truncated cone, and the bottom ends of the positioning columns are slidably connected with the transverse rods in the length direction of the transverse rods. The problems that in the prior art, the number of bolt holes in spokes on different vehicle models or the axle distances between the bolt holes and the axes of the spokes are different, due to the fact that the positions of positioning columns in a special clamp are fixed, the special clamp is difficult to be matched with the spokes with different hole numbers or axle distances, hubs of different vehicle models are difficult to clamp, and certain limitation exists are solved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing, and in particular to an auxiliary device for hub manufacturing welding. Background Art

[0002] The wheel hub is the central part of the wheel where the axle is mounted, also known as the wheel rim, steel rim or tire bell. It is not only a metal component that supports the tire, but also carries the important function of vehicle driving. The wheel hub is mainly composed of the rim and spokes. There are many manufacturing processes for the wheel hub, including one-piece processing and split processing. The one-piece processed wheel hub is usually formed in one go through processes such as casting and forging. Split processing usually processes and manufactures the rim and spokes separately, and then connects them together through bolts, welding, etc.

[0003] In the prior art, when welding the rim and the spoke, a special clamp is usually used to clamp and fix the spoke to the rim. A fixed positioning column with the same number of bolt holes as the bolt holes in the spoke is set on the special clamp, and the positioning column is inserted into the bolt hole to align and overlap the spoke axis with the rim axis. However, the number of bolt holes in the spoke and the wheelbase between the spoke axis and the spoke axis are different for different car models. Since the position of the positioning column in the special clamp is fixed, it is difficult to adapt to the spokes with different numbers of holes or wheelbases, and it is difficult to clamp the wheel hubs of different car models, which has certain limitations. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an auxiliary device for wheel hub manufacturing welding to solve the problem that in the prior art, there are differences in the number of bolt holes in the spokes or the wheelbases between the spoke axes on different models. Since the position of the locating columns in the special clamps is fixed, it is difficult to adapt to spokes with different numbers of holes or wheelbases, and it is difficult to clamp the wheels of different models, which has certain limitations.

[0005] The present invention is achieved through the following technical solutions:

[0006] An auxiliary device for wheel hub manufacturing welding, comprising a bearing plate for holding a wheel rim, a truncated table coaxially fixedly connected to the middle of the top surface of the bearing plate, and a plurality of cross bars arranged on the top surface of the truncated table in a circumferential direction;

[0007] The plurality of cross bars all extend radially toward the truncated cone, and the cross bars are rotatably connected to the top surface of the truncated cone with the truncated cone axis as the center;

[0008] A plurality of the cross bars are each provided with a positioning column, the positioning column is parallel to the axis of the truncated cone, and the bottom end of the positioning column is slidably connected to the cross bar along the length direction of the cross bar.

[0009] Furthermore, an annular groove coaxial with the truncated cone is formed on the top surface of the truncated cone, a protrusion is fixedly connected to the bottom surface of the crossbar, and the protrusion is embedded in the annular groove and slidably fitted.

[0010] Furthermore, a notch is provided on the edge of the top surface of the truncated cone, one end of the notch is connected to the annular slide groove, and the other end is connected to the outside of the truncated cone, and the size of the protrusion is smaller than the size of the notch.

[0011] Furthermore, the top surface of the crossbar is provided with a strip-shaped slide groove extending in the length direction of the crossbar, a slider is slidably fitted in the strip-shaped slide groove, and the top surface of the slider is provided with a threaded hole penetrating the slider;

[0012] The outer circumferential surface of the positioning column is provided with an external thread, and the bottom end of the positioning column is inserted into the threaded hole and connected through threaded matching.

[0013] Furthermore, the top surface of the crossbar is provided with wheelbase scale lines evenly arranged in the length direction of the crossbar.

[0014] Furthermore, a clamping block is serially connected to the top of the positioning column, and the clamping block is connected to the positioning column through threaded cooperation.

[0015] Furthermore, a groove extending axially toward the positioning column is formed on the outer circumferential surface of the positioning column, and height scale lines evenly arranged along the length direction are engraved in the groove.

[0016] Furthermore, two clamping plates are provided on both sides of the truncated cone and are symmetrically arranged with the truncated cone axis as the center, and the two clamping plates are both slidably connected with the bearing plate along the radial direction of the bearing plate;

[0017] A driving part for driving the two clamping plates to move synchronously in opposite directions is provided between the two clamping plates and the carrying plate.

[0018] Furthermore, the top surface of the bearing plate is provided with two guide grooves corresponding to the two clamping plates one by one, and the guide grooves extend radially toward the bearing plate, and one end of the clamping plate is inserted into the guide groove and slidably fits;

[0019] The driving part comprises a screw rod with two ends having threads rotating in opposite directions, the screw rod is connected in series in two guide grooves, and the two ends of the screw rod pass through the two side walls of the two guide grooves facing away from the axis of the bearing plate and extend out of the bearing plate, and the screw rod is rotatably matched with the side walls of the guide groove;

[0020] The two clamping plates are respectively connected in series to the two ends of the screw rod and are connected through threaded fitting.

[0021] Furthermore, the truncated cone is a hollow structure with an opening at the bottom, and the middle part of the screw rod is serially connected to the inside of the truncated cone; the driving part also includes a support plate with a hollow middle part, a gear coaxially fixedly connected to the middle part of the screw rod, and a rack meshing with the gear;

[0022] The support plate is sleeved outside the truncated table and slides with the truncated table along the axial direction of the truncated table, and the top end of the clamping plate protrudes from the top surface of the support plate. A compression spring for supporting the support plate is provided between the support plate and the bearing plate;

[0023] A connecting rod is provided at the top of the rack, one end of the connecting rod is fixedly connected to the rack, and the other end of the connecting rod penetrates the side wall of the truncated table and extends out of the truncated table and is fixedly connected to the supporting plate.

[0024] The beneficial effects of the present invention are:

[0025] The auxiliary device for wheel hub manufacturing welding, when in use, places the wheel rim on a bearing plate, embeds the round table into the wheel rim, and limits the wheel rim from sliding freely on the bearing plate through the round table, so as to clamp the wheel rim; a plurality of cross bars are arranged on the top surface of the round table, and the cross bars are rotatably connected to the round table, so that the cross bars can drive the corresponding positioning columns to rotate on the round table, so as to change the distance between the two positioning columns, so that the device can adjust the distance between the positioning columns according to the distance between the bolt holes on the spokes, and position and clamp the spokes through the positioning columns;

[0026] Since the positioning column and the cross bar are connected by sliding along the radial direction of the truncated cone, the wheelbase between the axis of the positioning column and the axis of the truncated cone can be changed, so that the device can be adjusted accordingly according to the wheelbase between the bolt hole and the spoke; at the same time, when the number of positioning columns in the device exceeds the number of bolt holes in the spoke, the excess positioning columns can be moved to the hollow position in the spoke by sliding the positioning column on the cross bar and rotating the cross bar on the truncated cone, eliminating the blocking interference of the excess positioning columns on the spoke, so that the device can be used for positioning and clamping spokes with different numbers of bolt holes. That is, the device can position and clamp spokes with different bolt hole spacings, spokes with different wheelbases, and spokes with different numbers of bolt holes, so that the device has high practicality. When different hubs need to be welded, there is no need to disassemble and replace special clamps, which provides convenience for the welding of hubs.

[0027] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention (viewing angle 1);

[0029] Figure 2 Schematic diagram of the three-dimensional structure of an embodiment of the present invention (viewing angle 2);

[0030] Figure 3Schematic diagram of the three-dimensional structure of an embodiment of the present invention (viewing angle 3);

[0031] Figure 4 Schematic diagram of the three-dimensional structure of the cross bar and the positioning column in the embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of the three-dimensional structure of a load-bearing plate in an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the three-dimensional structure of the embodiment of the present invention without the carrying plate;

[0034] Figure 7 It is a schematic diagram of the three-dimensional structure of the support plate in an embodiment of the present invention.

[0035] In the figure: 1, bearing plate; 11, guide groove; 12, slide bar; 2, round table; 21, annular slide groove; 22, notch; 3, cross bar; 31, convex block; 32, strip slide groove; 33, wheelbase scale line; 4, positioning column; 41, slider; 42, threaded hole; 43, clamping block; 44, groove; 45, height scale line; 5, clamping plate; 61, screw rod; 62, support plate; 63, gear; 64, rack; 65, compression spring; 66, connecting rod; 71, rim; 72, spoke. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0041] See also Figure 1-7 The present invention provides a technical solution: an auxiliary device for wheel hub manufacturing welding, comprising a carrier plate 1 for holding a wheel rim 71, a truncated table 2 is coaxially fixedly connected to the middle of the top surface of the carrier plate 1, and a plurality of cross bars 3 are arranged on the top surface of the truncated table 2 in a circumferential direction;

[0042] The plurality of cross bars 3 all extend radially toward the truncated cone 2, and the cross bars 3 are rotatably connected to the top surface of the truncated cone 2 with the axis of the truncated cone 2 as the center;

[0043] A plurality of the cross bars 3 are each provided with a positioning column 4 , the positioning column 4 is parallel to the axis of the truncated table 2 , and the bottom end of the positioning column 4 is slidably connected to the cross bar 3 along the length direction of the cross bar 3 .

[0044] When in use, the rim 71 is placed on the carrier plate 1, so that the truncated cone 2 is embedded in the rim 71, and the truncated cone 2 is used to limit the free sliding of the rim 71 on the carrier plate 1, so as to clamp the rim 71; a plurality of cross bars 3 are arranged on the top surface of the truncated cone 2, and the cross bars 3 are rotatably connected with the truncated cone 2, so that the cross bars 3 can drive the corresponding positioning columns 4 to rotate on the truncated cone 2, so as to change the distance between the two positioning columns 4, so that the device can adjust the distance between the positioning columns 4 according to the distance between the bolt holes on the spokes 72, and the spokes 72 can be positioned and clamped by the positioning columns 4;

[0045] Since the positioning column 4 and the cross bar 3 are connected by radial sliding along the truncated cone 2, the wheelbase between the axis of the positioning column 4 and the axis of the truncated cone 2 can be changed, so that the device can be adjusted accordingly according to the wheelbase between the bolt hole and the spoke 72; at the same time, when the number of positioning columns 4 in the device is more than the number of bolt holes in the spoke 72, the redundant positioning columns 4 can be moved to the hollow position in the spoke 72 by sliding the positioning columns 4 on the cross bar 3 and rotating the cross bar 3 on the truncated cone 2, eliminating the blocking interference of the redundant positioning columns 4 on the spoke 72, so that the device can be used for positioning and clamping the spoke 72 with different numbers of bolt holes. That is, the device can position and clamp the spoke 72 with different bolt hole spacings, spokes 72 with different wheelbases, and spokes 72 with different numbers of bolt holes, so that the device has high practicality. When different hubs need to be welded, there is no need to disassemble and replace the special clamp, which provides convenience for the welding of the hub.

[0046] In this embodiment, the top surface of the truncated table 2 is provided with an annular groove 21 coaxial with the truncated table 2 , and the bottom surface of the crossbar 3 is fixedly connected with a protrusion 31 , and the protrusion 31 is embedded in the annular groove 21 and slidably fits.

[0047] In this embodiment: a notch 22 is provided on the edge of the top surface of the truncated table 2 , one end of the notch 22 is connected to the annular groove 21 , and the other end is connected to the outside of the truncated table 2 , and the size of the protrusion 31 is smaller than that of the notch 22 .

[0048] The cross section of the annular chute 21 is T-shaped, and the top surface of the protrusion 31 is in contact with the inner top surface of the annular chute 21 to limit the protrusion 31 from moving out of the opening of the annular chute 21, and to support the crossbar 3 and the positioning column 4. By providing a notch 22 connecting the inner and outer sides of the annular chute 21, and the size of the protrusion 31 is smaller than the size of the notch 22, the protrusion 31 can slide out of the annular chute 21, that is, the crossbar 3 and the positioning column 4 can be removed from the truncated table 2, so as to increase or decrease the number of the positioning column 4, provide convenience for the positioning and clamping work of the spoke 72, and facilitate the inspection and replacement of the crossbar 3 and the positioning column 4.

[0049] In this embodiment: the top surface of the cross bar 3 is provided with a strip-shaped slide groove 32 extending in the length direction of the cross bar 3, a slider 41 is slidably fitted in the strip-shaped slide groove 32, and a threaded hole 42 penetrating the slider 41 is provided on the top surface of the slider 41;

[0050] The outer circumferential surface of the positioning column 4 is provided with an external thread, and the bottom end of the positioning column 4 is inserted into the threaded hole 42 and connected through threaded fitting.

[0051] The cam 41 is pressed against the bottom surface of the slider 41 and the bottom surface of the slider 41 is pressed against the bottom surface of the slider 41. The slider 41 is pushed upward and the cross section of the slider 41 is T-shaped, so that the top surface of the slider 41 is in contact with the inner top surface of the slider 41. The cam 41 is pressed against the bottom surface of the slider 41 and the bottom surface of the slider 41 is pressed against the bottom surface of the slider 41. The cam 41 is pressed against the bottom surface of the slider 41 and the bottom surface of the slider 41 is pressed against the bottom surface of the slider 41. The cam 41 is pressed against the bottom surface of the slider 41 and the bottom surface of the slider 41 is pressed against the bottom surface of the slider 41. The cam 41 is pressed against the bottom surface of the slider 41 and the bottom surface of the slider 41 is pressed against the bottom surface of the slider 41. The cam 41 is pressed against the bottom surface of the slider 41 and the bottom surface of the slider 41 is pressed against the bottom surface of the slider 41.

[0052] In this embodiment, the top surface of the cross bar 3 is also provided with wheelbase scale lines 33 evenly arranged in the length direction of the cross bar 3 .

[0053] By setting wheelbase scale lines 33 evenly distributed along the length direction of the cross bar 3 on the cross bar 3, it is easy to quickly read the wheelbase between the current position of the positioning column 4 and the axis of the frustum 2. The wheelbase between the bolt hole in the spoke 72 and the spoke 72 can be measured in advance. Before the cross bar 3 and the positioning column 4 are installed on the device, the slider 41 is adjusted to the corresponding position of the wheelbase scale line 33 on the cross bar 3 according to the measured wheelbase, which is simple and convenient to operate.

[0054] In this embodiment: a clamping block 43 is serially connected to the top of the positioning column 4, and the clamping block 43 is connected to the positioning column 4 through threaded connection.

[0055] By setting a clamping block 43 at the top of the positioning column 4, when the top of the positioning column 4 passes through the bolt hole, the clamping block 43 is connected in series to the outside of the positioning column 4 and screwed down, so that the clamping block 43 and the spoke 72 are abutted, and downward pressure is applied to the spoke 72 through the clamping block 43, so that the spoke 72 and the rim 71 fit tightly, and multiple positioning columns 4 are respectively inserted into multiple bolt holes on the spoke 72 to position the spoke 72, so that the axis of the spoke 72 overlaps with the axis of the rim 71, so as to facilitate the welding of the spoke 72 and the rim 71.

[0056] In this embodiment, a groove 44 extending axially toward the positioning column 4 is formed on the outer circumferential surface of the positioning column 4 , and height scale lines 45 evenly arranged along the length direction are engraved in the groove 44 .

[0057] The height markings evenly distributed along the axial direction of the positioning column 4 are engraved on the positioning column 4, and the length dimension of a part of the top of the positioning column 4 protruding from the top surface of the clamping block 43 can be read. Since the specifications and dimensions of multiple positioning columns 4 are the same, it is convenient to adjust the multiple clamping blocks 43 on the multiple positioning columns 4 to the same height, so as to evenly apply downward pressure to the spoke 72, so that the spoke 72 can fit smoothly with the rim 71.

[0058] In this embodiment: two clamping plates 5 are symmetrically arranged around the axis of the truncated table 2 on both sides of the truncated table 2, and the two clamping plates 5 are both slidably connected to the bearing plate 1 along the radial direction of the bearing plate 1;

[0059] A driving part for driving the two clamping plates 5 to move synchronously in opposite directions is provided between the two clamping plates 5 and the carrying plate 1 .

[0060] The two clamping plates 5 are driven by the driving unit to move synchronously in opposite directions on the supporting plate 1, so that the two clamping plates 5 move away from each other and protrude from the outer cylindrical surface of the cone 2 to increase the diameter of the cone 2, and the two clamping plates 5 are abutted against the inner cylindrical surface of the rim 71 to clamp and fix the rim 71, and the two clamping plates 5 are controlled by the driving unit to move synchronously in opposite directions, so that the axis of the cone 2 is always the center line of the two clamping plates 5, and the two clamping plates 5 automatically center the rim 71 when clamping the rim 71, so that the axis of the rim 71 overlaps with the axis of the cone 2, so as to overlap the axis of the spoke 72 with the axis of the rim 71, thereby providing convenience for welding.

[0061] In this embodiment: the top surface of the carrier plate 1 is provided with two guide grooves 11 corresponding to the two clamping plates 5, and the guide grooves 11 extend radially toward the carrier plate 1, and one end of the clamping plate 5 is inserted into the guide groove 11 and slidably fits;

[0062] The driving part includes a screw rod 61 with opposite screw threads at both ends, the screw rod 61 is connected in series in the two guide grooves 11, and the two ends of the screw rod 61 pass through the two side walls of the two guide grooves 11 facing away from the axis of the carrier plate 1 and extend out of the carrier plate 1, and the screw rod 61 is rotatably matched with the side walls of the guide groove 11;

[0063] The two clamping plates 5 are respectively connected in series to the two ends of the screw rod 61 and are connected by threaded fitting.

[0064] By inserting the bottom end of the clamping plate 5 into the guide groove 11, the bottom surface of the clamping plate 5 is in contact with the bottom surface of the guide groove 11 to limit the free rotation of the clamping plate 5. When clamping the rim 71, the rim 71 is sleeved outside the round table 2, and the screw rod 61 is rotated forward. The external threads at both ends of the screw rod 61 push the two clamping plates 5 to slide in the corresponding guide groove 11, so that the two clamping plates 5 slide synchronously and at the same speed in opposite directions until the two clamping plates 5 are against the inner surface of the rim 71, completing the centering clamping work of the rim 71.

[0065] In this embodiment: the truncated table 2 is a hollow structure with an opening at the bottom, and the middle part of the screw rod 61 is serially connected to the inside of the truncated table 2; the driving part also includes a support plate 62 with a hollow middle part, a gear 63 coaxially fixedly connected to the middle part of the screw rod 61, and a rack 64 meshing with the gear 63;

[0066] The support plate 62 is sleeved outside the truncated table 2 and slides with the truncated table 2 along the axial direction of the truncated table 2, and the top end of the clamping plate 5 protrudes from the top surface of the support plate 62. A compression spring 65 for supporting the support plate 62 is provided between the support plate 62 and the bearing plate 1;

[0067] A connecting rod 66 is disposed at the top of the rack 64 . One end of the connecting rod 66 is fixedly connected to the rack 64 , and the other end of the connecting rod 66 penetrates the side wall of the truncated table 2 , extends out of the truncated table 2 , and is fixedly connected to the supporting plate 62 .

[0068] The top edge of the supporting plate 1 is fixedly connected with a slide rod 12 which is perpendicular to the supporting plate 1, and the top end of the slide rod 12 passes through the support plate 62, extends out from the top surface of the support plate 62 and slides together. The compression spring 65 is sleeved outside the slide rod 12 to limit the tilting and flipping of the spring, reduce the probability of the compression spring 65 being crushed, and enable the compression spring 65 to continuously and stably provide flexible support to the support plate 62.

[0069] The weight of the rim 71 is transmitted to the screw rod 61 as power through the transmission structure composed of the support plate 62, the gear 63 and the rack 64. When the rim 71 is placed on the support plate 62, the support plate 62 slides downward under the weight of the rim 71, the compression spring 65 is squeezed and contracted, and the rack 64 moves downward with the support plate 62 to push the gear 63 to rotate forward, and the gear 63 drives the screw rod 61 to rotate forward, so that the two clamping plates 5 automatically slide away from each other to center the rim 71. That is, when the rim 71 is placed on the support plate 62, the two clamping plates 5 automatically position and clamp the rim 71.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An auxiliary device for wheel hub manufacturing welding, characterized in that: It comprises a bearing plate (1) for holding a wheel rim (71), a truncated cone (2) being coaxially fixedly connected to the middle of the top surface of the bearing plate (1), and a plurality of cross bars (3) being arranged on the top surface of the truncated cone (2) in a circumferential direction; The plurality of cross bars (3) all extend radially toward the truncated cone (2), and the cross bars (3) are rotatably connected to the top surface of the truncated cone (2) with the axis of the truncated cone (2) as the center; A plurality of the cross bars (3) are each provided with a positioning column (4), the positioning column (4) is parallel to the axis of the truncated cone (2), and the bottom end of the positioning column (4) is slidably connected to the cross bar (3) along the length direction of the cross bar (3).

2. The auxiliary device for wheel hub manufacturing welding according to claim 1, characterized in that: The top surface of the truncated table (2) is provided with an annular sliding groove (21) coaxial with the truncated table (2), and the bottom surface of the crossbar (3) is fixedly connected with a protrusion (31), and the protrusion (31) is embedded in the annular sliding groove (21) and slidably matched.

3. The auxiliary device for wheel hub manufacturing welding according to claim 2, characterized in that: A notch (22) is provided on the edge of the top surface of the truncated table (2), one end of the notch (22) is connected to the annular sliding groove (21), and the other end is connected to the outside of the truncated table (2), and the size of the protrusion (31) is smaller than the size of the notch (22).

4. The auxiliary device for wheel hub manufacturing welding according to claim 1, characterized in that: The top surface of the cross bar (3) is provided with a strip-shaped slide groove (32) extending in the length direction of the cross bar (3), a slider (41) is slidably fitted in the strip-shaped slide groove (32), and the top surface of the slider (41) is provided with a threaded hole (42) penetrating the slider (41); The outer circumferential surface of the positioning column (4) is provided with an external thread, and the bottom end of the positioning column (4) is inserted into the threaded hole (42) and connected through threaded matching.

5. The auxiliary device for wheel hub manufacturing welding according to claim 4, characterized in that: The top surface of the crossbar (3) is also provided with wheelbase scale lines (33) evenly arranged in the length direction of the crossbar (3).

6. The auxiliary device for wheel hub manufacturing welding according to claim 4, characterized in that: A clamping block (43) is serially connected to the top of the positioning column (4), and the clamping block (43) is connected to the positioning column (4) through threaded matching.

7. The auxiliary device for wheel hub manufacturing welding according to claim 6, characterized in that: A groove (44) extending axially towards the positioning column (4) is provided on the outer circumferential surface of the positioning column (4), and height scale lines (45) evenly arranged along the length direction are engraved in the groove (44).

8. The auxiliary device for wheel hub manufacturing welding according to claim 1, characterized in that: Two clamping plates (5) are symmetrically arranged with the axis of the truncated table (2) as the center, and the two clamping plates (5) are connected to the bearing plate (1) in a radially sliding manner along the bearing plate (1); A driving unit for driving the two clamping plates (5) to move synchronously in opposite directions is provided between the two clamping plates (5) and the carrying plate (1).

9. The auxiliary device for wheel hub manufacturing welding according to claim 8, characterized in that: The top surface of the carrier plate (1) is provided with two guide grooves (11) corresponding to the two clamping plates (5) one by one, and the guide grooves (11) extend radially toward the carrier plate (1), and one end of the clamping plate (5) is inserted into the guide groove (11) and slidably fits therein; The driving part comprises a screw rod (61) with two ends having threads rotating in opposite directions, the screw rod (61) is connected in series in two guide grooves (11), and the two ends of the screw rod (61) pass through the two side walls of the two guide grooves (11) facing away from the axis of the carrier plate (1) and extend out of the carrier plate (1), and the screw rod (61) is rotatably matched with the side walls of the guide groove (11); The two clamping plates (5) are respectively connected in series to the two ends of the screw rod (61) and are connected by threaded fitting.

10. The auxiliary device for wheel hub manufacturing welding according to claim 9, characterized in that: The truncated table (2) is a hollow structure with an opening at the bottom, and the middle part of the screw rod (61) is serially connected to the inside of the truncated table (2); the driving part also includes a support plate (62) with a hollow middle part, a gear (63) coaxially fixedly connected to the middle part of the screw rod (61), and a rack (64) meshing with the gear (63); The support plate (62) is sleeved outside the truncated table (2) and is slidably matched with the truncated table (2) along the axial direction of the truncated table (2), and the top end of the clamping plate (5) protrudes from the top surface of the support plate (62), and a compression spring (65) for supporting the support plate (62) is provided between the support plate (62) and the bearing plate (1); A connecting rod (66) is provided at the top end of the rack (64), one end of the connecting rod (66) is fixedly connected to the rack (64), and the other end of the connecting rod (66) passes through the side wall of the truncated table (2), extends out of the truncated table (2) and is fixedly connected to the support plate (62).

Images