Built-in wheel set brake disc press-fitting structure of railway vehicle

Abstract

The utility model discloses a built-in wheel set brake disc press-fitting structure of a railway vehicle. The built-in wheel set brake disc press-fitting structure comprises a process shaft connected with an axle. The transition sleeve is arranged between the process shaft and the axle; a press-fitting steel sleeve is arranged outside the process shaft; one end of the process shaft is a process shaft connecting part, the other end of the process shaft is a process shaft press-fitting part, the process shaft connecting part is connected with the axle, and a press-fitting steel sleeve is arranged outside the process shaft press-fitting part. According to the press-fitting structure, the length of the axle is increased by adding the process shaft, the wheel set press-fitting machine can conduct clamping, the structural design of the process shaft and the transition sleeve is adopted, the wheel set press-fitting machine does not need to be manufactured again to conduct press-fitting on the steel sleeve, cost is saved, and press-fitting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brake disc press-fitting for built-in axles of rail vehicles, and particularly relates to a press-fitting structure for brake discs of built-in axles of rail vehicles. Background Art

[0002] During the manufacturing process of railway vehicles, some light rail projects adopt built-in axles to achieve the purpose of reducing the weight of bogies and the volume of bogies. However, the axle length of the built-in axle is relatively small, generally less than 1800 mm, exceeding the stroke of the general axle press-fitting machine, and the conventional stroke of the axle press-fitting machine is 1800 mm - 2500 mm. At the same time, the built-in axle has no journal and axle shoulder, resulting in the inability of the axle press-fitting machine to clamp and position.

[0003] Therefore, based on the above technical problems, those skilled in the art urgently need to develop a press-fitting structure for brake discs of built-in axles of rail vehicles. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a press-fitting structure for brake discs of built-in axles of rail vehicles. By adding a process shaft to lengthen the axle length, the axle press-fitting machine can clamp. With the structural design of the process shaft and the transition sleeve, there is no need to remake the axle press-fitting machine to press-fit the steel sleeve, saving costs and improving the press-fitting efficiency.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A press-fitting structure for brake discs of built-in axles of rail vehicles according to the utility model, the press-fitting structure comprising:

[0007] A process shaft connected to the axle;

[0008] A transition sleeve arranged between the process shaft and the axle;

[0009] A press-fitting steel sleeve is arranged outside the process shaft;

[0010] One end of the process shaft is a process shaft connection part, and the other end is a process shaft press-fitting part. The process shaft connection part is connected to the axle, and a press-fitting steel sleeve is arranged outside the process shaft press-fitting part.

[0011] Further, a nylon sleeve is sleeved outside the axle;

[0012] A brake disc is hung on the part of the axle where the nylon sleeve is sleeved.

[0013] Further, the process shaft comprises:

[0014] The process shaft connection part with a cross-sectional dimension matching that of the axle, and the process shaft connection part is connected to the end of the axle through bolts; and

[0015] The process shaft press-fitting part that is transitionally connected to the process shaft connection part through a transition part;

[0016] The transition sleeve is sleeved outside the transition part.

[0017] Furthermore, the transition sleeve includes a transition part mating structure and a press-fit steel sleeve mating structure;

[0018] The inner diameter of the transition part mating structure matches the outer diameter of the transition part, and the inner diameter of the press-fit steel sleeve mating structure matches the outer diameter of the press-fit steel sleeve to achieve clearance fit with the press-fit steel sleeve.

[0019] Furthermore, a centering ring is provided at the connection between the process shaft connection part and the axle, and the process shaft connection part and the axle are positioned and connected through the centering ring.

[0020] Furthermore, one end of the centering ring is sleeved outside the axle, and the other end of the centering ring is sleeved outside the process shaft connection part.

[0021] In the above technical solution, a press-fitting structure for an in-wheel brake disc of a rail vehicle provided by the present utility model has the following beneficial effects:

[0022] The press-fitting structure of the present utility model adds a process shaft to lengthen the length of the axle, enabling the wheel set press-fitting machine to clamp. By adopting the structural design of the process shaft and the transition sleeve, it is not necessary to remanufacture the wheel set press-fitting machine to press-fit the steel sleeve, saving costs and improving the press-fitting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of a press-fitting structure for an in-wheel brake disc of a rail vehicle disclosed in an embodiment of the present utility model;

[0025] Figure 2 It is a front view of a press-fitting structure for an in-wheel brake disc of a rail vehicle disclosed in an embodiment of the present utility model;

[0026] Figure 3 It is a sectional view of a press-fitting structure for an in-wheel brake disc of a rail vehicle disclosed in an embodiment of the present utility model;

[0027] Figure 4This is an enlarged structural view of a press-fitting structure for an in-wheel brake disc of a rail vehicle disclosed in an embodiment of the present utility model.

[0028] Explanation of reference numerals:

[0029] 1. Axle; 2. Brake disc; 3. Process shaft; 4. Press-fitting steel sleeve; 5. Centering ring; 6. Transition sleeve;

[0030] 101. Nylon sleeve;

[0031] 301. Process shaft press-fitting part; 302. Process shaft connection part; 303. Transition part;

[0032] 601. Transition part mating structure; 602. Press-fitting steel sleeve mating structure. Detailed implementation manner

[0033] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0034] See Figures 1 to 4 as shown in

[0035] A press-fitting structure for an in-wheel brake disc of a rail vehicle in this embodiment, the press-fitting structure includes:

[0036] A process shaft 3 connected to the axle 1;

[0037] A transition sleeve 6 provided between the process shaft 3 and the axle 1;

[0038] A press-fitting steel sleeve 4 is provided outside the process shaft 3;

[0039] One end of the process shaft 3 is a process shaft connection part 302, and the other end is a process shaft press-fitting part 301. The process shaft connection part 302 is connected to the axle 1, and a press-fitting steel sleeve 4 is provided outside the process shaft press-fitting part 301.

[0040] Specifically, this embodiment discloses a press-fitting structure for an in-wheel brake disc 2 of a rail vehicle. In view of the problem that the length of the axle 1 of the in-wheel pair does not meet the requirements, in this embodiment, a process shaft 3 is installed at the end of the axle 1 to lengthen the overall length of the axle 1, and the process shaft 3 is used in cooperation with the in-wheel press-fitting machine to realize clamping; and a transition sleeve 6 is provided between the process shaft 3 and the axle 1. And in this embodiment, the process shaft lengthens the axle 1 and enables it to meet the clamping requirements of the in-wheel press-fitting machine.

[0041] The length of the process shaft 3 in this embodiment is adjusted according to the widths of the press-fitting steel sleeve 4 and the transition sleeve 6.

[0042] Preferably, a nylon sleeve 101 is sleeved outside the axle 1 of this embodiment; a brake disc 2 is hung on the part of the axle 1 where the nylon sleeve 101 is sleeved. In order to prevent the brake disc 2 from bumping against the press-fitted steel sleeve 4, the transition sleeve 6, the process shaft 3 and the axle 1, a nylon sleeve 101 is sleeved outside the axle 1, and the size of the nylon sleeve 101 of this embodiment is adjusted according to the sizes of the press-fitted steel sleeve 4, the transition sleeve 6, the process shaft 3 and the axle 1.

[0043] Preferably, the process shaft 3 of this embodiment includes a process shaft connection part 302 with a cross-sectional dimension matching that of the axle 1, and the process shaft connection part 302 is connected to the end of the axle 1 by bolts; and a process shaft press-fitting part 301 that is transitionally connected to the process shaft connection part 302 through a transition part 303; wherein, a transition sleeve 6 is sleeved outside the transition part 303 of this embodiment.

[0044] Wherein, the transition sleeve 6 of this embodiment includes a transition part matching structure 604 and a press-fitted steel sleeve matching structure 602;

[0045] The inner diameter of the transition part matching structure 601 matches the outer diameter of the transition part 303, and the inner diameter of the press-fitted steel sleeve matching structure 602 matches the outer diameter of the press-fitted steel sleeve 4 to achieve a clearance fit with the press-fitted steel sleeve 4.

[0046] Preferably, in order to achieve the centering and positioning installation of the process shaft 3 and the axle 1, a centering ring 5 is provided at the connection between the process shaft connection part 302 and the axle 1, and the process shaft connection part 302 and the axle 1 are positioned and connected through the centering ring 5. Specifically, one end of the centering ring 5 of this embodiment is sleeved outside the axle 1, and the other end of the centering ring 5 is sleeved outside the process shaft connection part 302.

[0047] In the above technical solution, a built-in wheel pair brake disc press-fitting structure of a rail vehicle provided by the present invention has the following beneficial effects:

[0048] The press-fitting structure of the present invention lengthens the length of the axle 1 by adding a process shaft 3, so that the wheel pair press can clamp. By adopting the structural design of the process shaft 3 and the transition sleeve 6, it is not necessary to re-manufacture the wheel pair press to press-fit the steel sleeve 4, which saves costs and improves the press-fitting efficiency.

[0049] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A rail vehicle internal wheel set brake disc press-fit structure, characterized in that: The press-fit structure includes: A process shaft (3) connected to the axle (1); A transition sleeve (6) disposed between the process shaft (3) and the axle (1); A press-fit steel sleeve (4) is arranged outside the process shaft (3); One end of the process shaft (3) is a process shaft connecting portion (302), and the other end is a process shaft pressing portion (301); the process shaft connecting portion (302) is connected to the axle (1), and the press-fitting steel sleeve (4) is arranged outside the process shaft pressing portion (301).

2. The rail vehicle internal wheel set brake disc press-fitting structure according to claim 1, characterized in that: The axle (1) is externally sleeved with a nylon sleeve (101); A brake disc (2) is mounted on the portion of the axle (1) where the nylon sleeve (101) is sleeved.

3. The rail vehicle internal wheelset brake disc press-fit structure according to claim 1, characterized in that: The process axis (3) comprises: The process shaft connecting portion (302) has a cross-sectional size matching that of the axle (1), and the process shaft connecting portion (302) is connected to the end of the axle (1) via bolts; and The process shaft press-fitting portion (301) is transitionally connected to the process shaft connecting portion (302) via a transition portion (303); The transition portion (303) is externally sleeved with the transition sleeve (6).

4. The rail vehicle internal wheel set brake disc press-fitting structure according to claim 3, characterized in that: The transition sleeve (6) comprises a transition portion matching structure (601) and a press-fit steel sleeve matching structure (602); The inner diameter of the transition portion matching structure (601) matches the outer diameter of the transition portion (303), and the inner diameter of the press-fit steel sleeve matching structure (602) matches the outer diameter of the press-fit steel sleeve (4) to achieve clearance matching with the press-fit steel sleeve (4).

5. A rail vehicle internal wheelset brake disc press-fit structure according to claim 1 or 3, characterized in that: A centering ring (5) is provided at the connection point between the process shaft connection part (302) and the axle (1), and the process shaft connection part (302) and the axle (1) are positioned and connected via the centering ring (5).

6. A rail vehicle internal wheelset brake disc press-fit structure according to claim 5, characterized in that: One end of the centering ring (5) is sleeved on the outside of the axle (1), and the other end of the centering ring (5) is sleeved on the outside of the process shaft connecting part (302).

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