Positioning device for wheel assembly

Abstract

The invention relates to a positioning device for wheel assembly, and belongs to the technical field of wheel assembly. The positioning device for wheel assembly comprises a positioning piece, the positioning piece is installed on an axle, and the first end of the positioning piece abuts against a gear on the axle; the adjusting assembly is arranged at the second end of the positioning piece; and the abutting block is arranged on the adjusting assembly, the adjusting assembly is used for adjusting the abutting block to the preset position, and the wheel abuts against the abutting block so that the wheel can be positioned to the correct position. And the subsequent wheel adjusting step is omitted, and the wheel mounting efficiency and accuracy are improved.

Description

Technical Field

[0001] The present application relates to the technical field of wheel assembly, and in particular to a positioning device for wheel assembly. Background Art

[0002] In the field of modern transportation, wheels are key components for vehicle driving, and their assembly quality is directly related to driving safety and overall performance. Whether it is cars, trains, or various industrial vehicles, the precise assembly of wheels is an indispensable production link.

[0003] The existing wheel assembly method requires that the wheel be heated first, and workers rely on their experience to align the heated wheel with the axle for installation. After the wheel is installed on the axle, the wheel is adjusted to the correct position according to the wheel assembly template.

[0004] However, during the wheel adjustment process, the temperature of the inner hub hole surface drops rapidly and the distance the wheel moves on the axle is limited, resulting in the wheel being unable to be adjusted to the correct position. Summary of the invention

[0005] The present application provides a positioning device for wheel assembly, which can achieve positioning by abutting the wheel installed on the axle against the device. The positioned wheel does not need to be adjusted, thereby improving the efficiency and accuracy of wheel installation.

[0006] The present application provides a positioning device for wheel assembly, comprising:

[0007] A positioning member, the positioning member is mounted on the axle, and a first end of the positioning member abuts against a gear on the axle;

[0008] an adjusting assembly, the adjusting assembly being arranged at the second end of the positioning member;

[0009] An abutment block is arranged on the adjustment assembly, and the adjustment assembly is used to adjust the abutment block to a preset position, and the wheel is positioned to a correct position by abutting the wheel against the abutment block.

[0010] In an embodiment of the present application, the adjustment assembly described in the present application includes a screw rod and a nut disposed on the screw rod;

[0011] A first screw hole is provided at the second end of the positioning member, one end of the screw rod is connected to the first screw hole, and the other end is connected to the abutment block. After the abutment block is adjusted to the preset position through the cooperation between the screw rod and the first screw hole, the nut is moved along the screw rod to the abutment position with the second end of the positioning member to lock the screw.

[0012] In the embodiment of the present application, a protrusion is further provided on the second end of the positioning member, and the protrusion is used to abut against the nut.

[0013] In the embodiment of the present application, the adjustment assembly includes a sliding rod and a positioning bolt;

[0014] A limiting hole is provided at the second end of the positioning member, one end of the sliding rod is slidably connected to the limiting hole, and the other end is connected to the abutment block;

[0015] A second screw hole is also provided at the second end of the positioning member, and the second screw hole is connected to the limiting hole. After the abutment block is adjusted to the preset position through the cooperation between the sliding rod and the limiting hole, the positioning bolt is abutted against the sliding rod through the second screw hole to lock the sliding rod.

[0016] In an embodiment of the present application, a first blocking portion is provided at the opening of the limiting hole, and a second blocking portion is provided at one end of the sliding rod located in the limiting hole, and the first blocking portion is used to abut against the second blocking portion to prevent the sliding rod from escaping from the limiting hole.

[0017] In an embodiment of the present application, the positioning member includes a positioning rod and at least one supporting frame;

[0018] The support frame is arranged on the positioning rod, the adjustment assembly is arranged on the positioning rod, and one end of the support frame away from the positioning rod is connected to the axle.

[0019] In the embodiment of the present application, the support frame is in the shape of an arc.

[0020] In the embodiment of the present application, the support frame is a magnet frame;

[0021] Alternatively, a magnet is provided on the support frame, and the magnet is used to absorb the axle to fix the support frame on the axle.

[0022] In the embodiment of the present application, a protective cover is also included, which is mounted on the positioning member and has anti-slip textures on the surface of the protective cover.

[0023] In the embodiment of the present application, a buffer gasket is provided on the side of the abutment block abutting against the wheel.

[0024] The positioning device for wheel assembly provided by the present application comprises a positioning member, which is mounted on the axle, and the first end of the positioning member abuts against the gear on the axle; an adjustment component, which is arranged at the second end of the positioning member; and an abutment block, which is arranged on the adjustment component and is used to adjust the abutment block to a preset position, and the wheel is positioned to the correct position by abutting the wheel against the abutment block. This saves the subsequent steps of adjusting the wheel, and improves the efficiency and accuracy of wheel installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 A schematic structural diagram of a positioning device for wheel assembly provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 An enlarged view of the first embodiment at A in the middle;

[0028] Figure 3 for Figure 1 An enlarged view of the second embodiment at A in the middle;

[0029] Figure 4 for Figure 1 Cross-sectional view at the middle BB.

[0030] Reference numerals:

[0031] 10- axle; 11- gear; 20- wheel;

[0032] 100-positioning member; 110-first screw hole; 120-protrusion; 130-limiting hole; 131-first blocking portion; 140-second screw hole; 150-positioning rod; 160-support frame;

[0033] 200-adjustment assembly; 210-screw rod; 220-nut; 230-sliding rod; 231-second blocking portion; 240-positioning bolt;

[0034] 300 - Abutment block.

[0035] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the implementation of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein. In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner.

[0038] In the field of locomotive manufacturing and maintenance, wheel assembly is an extremely critical process, and its assembly accuracy and quality are directly related to the safety and stability of locomotive operation. The traditional locomotive wheel assembly process uses interference fit to connect the axle and the wheel, and relies on a specific wheel assembly template to control the assembly position.

[0039] Specifically, the wheels need to be heated to 210°C during assembly. This high-temperature treatment is to utilize the thermal expansion and contraction characteristics of metals to expand the inner diameter of the wheel hub hole, so that it can be easily inserted into the axle wheel seat at room temperature. However, this traditional process has many thorny problems. During the assembly stage, the template used only measures the distance from the axle shoulder to the end face of the wheel hub hole. The measurement dimension is single, and it is difficult to fully and accurately locate. When the hot wheel is put on the room-temperature axle, the temperature of the inner hub hole surface of the wheel drops sharply and shrinks rapidly, causing the wheel to instantly "lock" on the axle, losing the possibility of displacement adjustment. Once the initial assembly position deviates slightly, since the wheel and the axle are tightly stuck, the assembled part can only be disassembled and started over.

[0040] This disassembly and reassembly operation has serious consequences. On the one hand, after the wheel is assembled, stress is highly concentrated on the surface of the wheel hub hole and the outer surface of the axle. When forced to disassemble, the huge stress release will instantly cause damage to the wheel and axle. In mild cases, the surface will be strained, affecting the appearance and subsequent assembly accuracy; in severe cases, the axle and wheel will be directly scrapped, greatly increasing production costs and production cycles.

[0041] In view of the above problems, the present application provides a positioning device for wheel assembly, which can install the wheel to the correct position in one step, thereby improving the installation efficiency and accuracy of the wheel. The proposal will be further described below in conjunction with the accompanying drawings.

[0042] in, Figure 1 A schematic structural diagram of a positioning device for wheel assembly provided in an embodiment of the present application. Figure 2 for Figure 1An enlarged view of the first embodiment at A in the middle. Figure 3 for Figure 1 An enlarged view of the second embodiment at A in the middle. Figure 4 This is an enlarged view of BB.

[0043] Combination Figure 1-3 As shown, the present application provides a positioning device for wheel assembly, comprising:

[0044] A positioning member 100, wherein the positioning member 100 is mounted on the axle 10, and a first end of the positioning member 100 abuts against a gear 11 on the axle 10;

[0045] The adjusting component 200 is disposed at the second end of the positioning member 100 .

[0046] The abutment block 300 is disposed on the adjustment assembly 200 . The adjustment assembly 200 is used to adjust the abutment block 300 to a preset position, and the wheel 20 is positioned to a correct position by abutting the abutment block 300 .

[0047] The positioning member 100 is arranged on the axle 10, and the adjusting assembly 200 on the positioning member 100 adjusts the abutting block 300 to a preset position as required. When the wheel 20 needs to be installed, one end of the positioning member 100 is first abutted against the gear 11 on the axle 10, and the heated wheel 20 is installed on the axle 10, and the wheel 20 is installed after it is slowly pushed until it abuts against the abutting block 300. This saves the subsequent steps of adjusting the wheel 20, and improves the installation efficiency and accuracy of the wheel 20.

[0048] In the embodiment of the present application, the adjustment assembly 200 described in the present application includes a screw rod 210 and a nut 220 disposed on the screw rod 210 .

[0049] A first screw hole 110 is provided at the second end of the positioning member 100, one end of the screw rod 210 is connected to the first screw hole 110, and the other end is connected to the abutment block 300. After the abutment block 300 is adjusted to the preset position through the cooperation between the screw rod 210 and the first screw hole 110, the nut 220 is moved along the screw rod 210 to the abutment position with the second end of the positioning member 100 to lock the screw rod 210.

[0050] In this embodiment, the second end of the positioning member 100 is an end close to the wheel 20 to be installed.

[0051] The adjustment assembly 200 in this embodiment includes a screw rod 210 and a nut 220 disposed on the screw rod 210. The screw rod 210 is used as the main adjustment component, one end of which is connected to the first screw hole 110 at the second end of the positioning member 100, and the other end is connected to the abutment block 300. By rotating the screw rod 210, it can be rotated in the first screw hole 110, thereby driving the abutment block 300 to move along the axial direction of the screw rod 210, thereby achieving the adjustment of the position of the abutment block 300.

[0052] The nut 220 is used to lock the screw rod 210 after the abutment block 300 is adjusted to a preset position, so as to prevent the screw rod 210 from loosening during use and ensure that the position of the abutment block 300 remains fixed. The nut 220 and the screw rod 210 are threadedly matched. When the nut 220 moves along the screw rod 210 to abut against the second end of the positioning member 100, the nut 220 is tightened to generate sufficient pressure on the positioning member 100, thereby limiting the rotation and axial movement of the screw rod 210 and achieving the purpose of locking.

[0053] Through the cooperation between the screw rod 210 and the first screw hole 110 and the locking action of the nut 220, the position of the abutment block 300 can be precisely adjusted, thereby accurately positioning the wheel 20 in the correct position, improving the assembly accuracy of the wheel 20 and facilitating the driving performance and safety of the vehicle.

[0054] The adjustment assembly 200 has a simple structure and is easy to operate. The position of the abutment block 300 can be adjusted by simply rotating the screw rod 210. It can quickly adapt to the positioning requirements of wheels 20 of different specifications, thereby improving the versatility and flexibility of the positioning device.

[0055] In the embodiment of the present application, a protrusion 120 is further provided at the second end of the positioning member 100 , and the protrusion 120 is used to abut against the nut 220 .

[0056] When the nut 220 moves along the screw rod 210 to abut against the raised portion 120 , the contact area and friction between the nut 220 and the positioning member 100 can be further increased, thereby improving the locking effect and preventing the nut 220 from loosening due to vibration or the like during vehicle driving, thereby ensuring the stability and reliability of the wheel 20 positioning.

[0057] The nut 220 abuts against the raised portion 120 at the second end of the positioning member 100, effectively preventing the nut 220 from loosening and ensuring the fixation of the abutment block 300, thereby ensuring the positioning stability of the wheel 20 during assembly and vehicle driving, and reducing failures and safety hazards caused by position deviation of the wheel 20.

[0058] In the embodiment of the present application, the adjustment assembly 200 includes a sliding rod 230 and a positioning bolt 240 .

[0059] The second end of the positioning member 100 is provided with a limiting hole 130, one end of the sliding rod 230 is slidably connected to the limiting hole 130, and the other end is connected to the abutment block 300;

[0060] The second end of the positioning member 100 is also provided with a second screw hole 140, which is connected to the limiting hole 130. After the abutment block 300 is adjusted to the preset position through the cooperation between the sliding rod 230 and the limiting hole 130, the positioning bolt 240 is abutted against the sliding rod 230 through the second screw hole 140 to lock the sliding rod 230.

[0061] The adjustment assembly 200 in this embodiment is mainly composed of a sliding rod 230 and a positioning bolt 240. A limiting hole 130 is provided at the second end of the positioning member 100. One end of the sliding rod 230 is inserted into the limiting hole 130 and forms a sliding connection with the limiting hole 130, so that the sliding rod 230 can slide freely along the axial direction in the limiting hole 130, thereby achieving position adjustment. The other end of the sliding rod 230 is firmly connected to the abutment block 300, and the movement of the sliding rod 230 drives the abutment block 300 to move synchronously.

[0062] The second end of the positioning member 100 is also provided with a second screw hole 140, which is in communication with the limiting hole 130. After the abutment block 300 is adjusted to a preset position through the cooperation between the sliding rod 230 and the limiting hole 130, the positioning bolt 240 is passed through the second screw hole 140, and its end is tightly abutted against the sliding rod 230. By tightening the positioning bolt 240, the sliding rod 230 is firmly locked in the current position by utilizing the friction between the bolt and the sliding rod 230 and the squeezing force of the bolt on the sliding rod 230, preventing it from being displaced during use, ensuring the fixation of the position of the abutment block 300, and thus ensuring the accuracy and stability of the positioning of the mechanical parts.

[0063] The design of the limiting hole 130 and the second screw hole 140 at the second end of the positioning member 100 has been carefully optimized. The diameter of the limiting hole 130 matches the diameter of the sliding rod 230, which not only ensures that the sliding rod 230 can slide smoothly in the hole, but also effectively limits its radial displacement, ensuring that the sliding rod 230 can only move in the axial direction, thereby improving the accuracy and stability of the adjustment.

[0064] The position and angle of the second screw hole 140 are also precisely designed so that the connecting portion with the limiting hole 130 can better cooperate with the positioning bolt 240 to lock the sliding rod 230. When the positioning bolt 240 is tightened, it can evenly apply pressure to the sliding rod 230, further enhancing the locking effect and preventing the sliding rod 230 from loosening due to vibration, external force and other factors, thereby ensuring the positioning accuracy of the mechanical parts during long-term use.

[0065] In the embodiment of the present application, a first blocking portion 131 is provided at the opening of the limiting hole 130, and a second blocking portion 231 is provided at one end of the sliding rod 230 located in the limiting hole 130, and the first blocking portion 131 is used to abut against the second blocking portion 231 to prevent the sliding rod 230 from detaching from the limiting hole 130.

[0066] A first blocking portion 131 is provided at the opening of the limiting hole 130. The first blocking portion 131 may be an annular flange extending outward from the edge of the limiting hole 130, or a block fixedly installed at the opening. At the same time, a second blocking portion 231 is provided at one end of the sliding rod 230 located in the limiting hole 130. The second blocking portion 231 may be a thickened portion at the end of the sliding rod 230, or a blocking piece welded to the end of the sliding rod 230. When the sliding rod 230 slides in the limiting hole 130, the first blocking portion 131 cooperates with the second blocking portion 231. The first blocking portion 131 can effectively block the second blocking portion 231 to prevent the sliding rod 230 from accidentally detaching from the limiting hole 130, thereby ensuring the stability and reliability of the positioning device during use.

[0067] like Figure 4 As shown, in the embodiment of the present application, the positioning member 100 includes a positioning rod 150 and at least one supporting frame 160;

[0068] The support frame 160 is disposed on the positioning rod 150 , the adjustment assembly 200 is disposed on the positioning rod 150 , and one end of the support frame 160 away from the positioning rod 150 is used to be connected to the axle 10 .

[0069] The positioning member 100 includes a positioning rod 150 and at least one support frame 160. The positioning rod 150, as the main supporting structure, has a certain length and strength, can withstand the force transmitted by the axle 10, and provide a stable installation foundation for the support frame 160. The support frame 160 is a key component connecting the positioning rod 150 and the axle 10, one end of which is fixedly connected to the positioning rod 150, and the other end is connected to the axle 10, for realizing the precise positioning of the axle 10.

[0070] In the embodiment of the present application, the support frame 160 is in an arc shape.

[0071] The support frame 160 is designed in an arc shape, and its curvature matches the circumference of the axle 10. The arc-shaped support frame 160 is made of high-strength alloy steel material, has good toughness and strength, and can withstand various forces generated by the axle 10 during operation. Its inner diameter is slightly larger than the outer diameter of the axle 10, so that it can be smoothly sleeved on the axle 10, while ensuring sufficient contact area with the axle 10, thereby providing stable support and positioning.

[0072] In the embodiment of the present application, the support frame 160 is a magnet frame.

[0073] Alternatively, a magnet is disposed on the support frame 160 , and the magnet is used to absorb the axle 10 to fix the support frame 160 on the axle 10 .

[0074] When the magnet frame is close to the axle 10, the magnet frame tightly adsorbs the component on its surface through magnetic adsorption, thereby supporting and positioning the component. This magnetic adsorption connection method is not only simple and fast, but also does not require the use of additional connectors, reducing installation steps and costs. In addition, due to the adjustability of the magnetic force, the magnet frame can adapt to components of different sizes and shapes within a certain range, improving the versatility and flexibility of the device.

[0075] In the embodiment of the present application, a protective cover is also included, which is sleeved on the positioning member 100 and has anti-skid patterns on its surface, so as to facilitate the taking of the positioning member 100 and avoid slipping.

[0076] In the embodiment of the present application, a buffer pad is provided on the side of the abutting block 300 abutting against the wheel 20 , which is used to reduce the impact force between the axle 10 and the abutting block 300 to avoid damaging the axle 10 .

[0077] The positioning device for wheel assembly provided by the present application comprises a positioning member, which is mounted on the axle, and the first end of the positioning member abuts against the gear on the axle; an adjustment component, which is arranged at the second end of the positioning member; and an abutment block, which is arranged on the adjustment component and is used to adjust the abutment block to a preset position, and the wheel is positioned to the correct position by abutting the wheel against the abutment block. This saves the subsequent steps of adjusting the wheel, and improves the efficiency and accuracy of wheel installation.

[0078] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0079] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0080] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0081] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0082] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A positioning device for wheel assembly, characterized in that: include: A positioning member (100), the positioning member (100) being used for being mounted on an axle (10), and a first end of the positioning member (100) being used for abutting against a gear (11) on the axle (10); an adjustment component (200), the adjustment component (200) being arranged at the second end of the positioning member (100); An abutment block (300) is arranged on the adjustment assembly (200), and the adjustment assembly (200) is used to adjust the abutment block (300) to a preset position, so that the wheel (20) is positioned at a correct position by abutting the wheel (20) against the abutment block (300).

2. The positioning device for wheel assembly according to claim 1, characterized in that: The adjustment assembly (200) comprises a screw rod (210) and a nut (220) arranged on the screw rod (210); the second end of the positioning member (100) is provided with a first screw hole (110); One end of the screw rod (210) is connected to the first screw hole (110), and the other end is connected to the abutment block (300). After the abutment block (300) is adjusted to the preset position through the cooperation between the screw rod (210) and the first screw hole (110), the nut (220) is moved along the screw rod (210) to the abutment position with the second end of the positioning member (100) to lock the screw rod (210).

3. The positioning device for wheel assembly according to claim 2, characterized in that: The second end of the positioning member (100) is also provided with a protrusion (120), and the protrusion (120) is used to abut against the nut (220).

4. The positioning device for wheel assembly according to claim 1, characterized in that: The adjustment assembly (200) further comprises a sliding rod (230) and a positioning bolt (240), and a limiting hole (130) is provided at the second end of the positioning member (100); One end of the sliding rod (230) is slidably connected to the limiting hole (130), and the other end is connected to the abutment block (300); The second end of the positioning member (100) is also provided with a second screw hole (140), and the second screw hole (140) is connected to the limiting hole (130). After the abutment block (300) is adjusted to the preset position through the cooperation between the sliding rod (230) and the limiting hole (130), the positioning bolt (240) is abutted against the sliding rod (230) through the second screw hole (140) to lock the sliding rod (230).

5. The positioning device for wheel assembly according to claim 4, characterized in that: A first blocking portion (131) is provided at the opening of the limiting hole (130), and a second blocking portion (231) is provided at one end of the sliding rod (230) located in the limiting hole (130), and the first blocking portion (131) is used to abut against the second blocking portion (231) to prevent the sliding rod (230) from escaping from the limiting hole (130).

6. The positioning device for wheel assembly according to any one of claims 1 to 5, characterized in that: The positioning member (100) comprises a positioning rod (150) and at least one supporting frame (160); The support frame (160) is arranged on the positioning rod (150), the adjustment assembly (200) is arranged on the positioning rod (150), and one end of the support frame (160) away from the positioning rod (150) is used for connecting with the axle (10).

7. The positioning device for wheel assembly according to claim 6, characterized in that: The support frame (160) is in the shape of an arc.

8. The positioning device for wheel assembly according to claim 7, characterized in that: The support frame (160) is a magnet frame; Alternatively, a magnet is provided on the support frame (160), and the magnet is used to absorb the axle (10) so as to fix the support frame (160) on the axle (10).

9. The positioning device for wheel assembly according to any one of claims 1 to 5, characterized in that: It also comprises a protective sleeve, which is sleeved on the positioning piece (100), and the surface of the protective sleeve is provided with anti-slip patterns.

10. The positioning device for wheel assembly according to any one of claims 1 to 5, characterized in that: A buffer pad is provided on the side of the abutment block (300) abutting against the wheel (20).

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