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

Abstract

The invention 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, the cost is saved, and the press-fitting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of press-fitting brake discs of built-in wheelsets of rail vehicles, and in particular to a press-fitting structure of brake discs of built-in wheelsets of rail vehicles. Background Art

[0002] In the process of railway vehicle manufacturing, some light rail projects use built-in wheelsets to reduce the weight and volume of bogies. However, the length of the axle of the built-in wheelset is relatively small, generally less than 1800mm, which exceeds the stroke of the general wheelset press, while the stroke of the conventional wheelset press is 1800mm to 2500mm. At the same time, the axle of the built-in wheelset has no journal and shoulder, which makes it impossible for the wheelset press to clamp and position.

[0003] Therefore, based on the above technical problems, technicians in this field urgently need to develop a press-fit structure for the built-in wheelset brake disc of a rail vehicle. Summary of the invention

[0004] The purpose of the present invention is to provide a press-fitting structure for a built-in wheelset brake disc of a rail vehicle. The axle length is lengthened by adding a process shaft so that the wheelset press-fitting machine can be clamped. The process shaft and transition sleeve structure design is adopted, and there is no need to re-make the wheelset press-fitting machine to press the steel sleeve, thereby saving costs and improving the press-fitting efficiency.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A rail vehicle internal wheel set brake disc press-fit structure of the present invention comprises:

[0007] A process shaft connected to the axle;

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

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

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

[0011] Furthermore, the outer sleeve of the axle is provided with a nylon sleeve;

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

[0013] Furthermore, the process axis includes:

[0014] The process shaft connecting portion has a cross-sectional size matching that of the axle, and the process shaft connecting portion is connected to the end of the axle by bolts; and

[0015] The process shaft press-fitting portion transitionally connected to the process shaft connecting portion through a transition portion;

[0016] The transition sleeve is disposed outside the transition portion.

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

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

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

[0021] In the above technical solution, the present invention provides a rail vehicle internal wheel set brake disc press-fitting structure, which has the following beneficial effects:

[0022] The press-fitting structure of the present invention lengthens the axle length by adding a process shaft so that the wheelset press-fitting machine can clamp the wheelset. The process shaft and transition sleeve structure design eliminates the need to re-manufacture the wheelset press-fitting machine to press the steel sleeve, thereby saving costs and improving press-fitting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. It is obvious that the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a structural schematic diagram of a rail vehicle internal wheelset brake disc press-fitting structure disclosed in an embodiment of the present invention;

[0025] Figure 2 It is a front view of a rail vehicle internal wheelset brake disc press-fitting structure disclosed in an embodiment of the present invention;

[0026] Figure 3 A cross-sectional view of a rail vehicle internal wheelset brake disc press-fitting structure disclosed in an embodiment of the present invention;

[0027] Figure 4 It is an enlarged structural diagram of a rail vehicle internal wheelset brake disc press-fitting structure disclosed in an embodiment of the present invention.

[0028] Description of reference numerals:

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

[0030] 101, Nylon sleeve;

[0031] 301, process shaft press-fitting part; 302, process shaft connecting part; 303, transition part;

[0032] 601. Transition part matching structure; 602. Pressed steel sleeve matching structure. DETAILED DESCRIPTION

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

[0034] See also Figures 1 to 4 As shown;

[0035] A rail vehicle internal wheelset brake disc press-fit structure according to this embodiment includes:

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

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

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

[0039] 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 a pressing steel sleeve 4 is arranged outside the process shaft pressing portion 301 .

[0040] Specifically, this embodiment discloses a press-fit structure of a built-in wheelset brake disc 2 of a rail vehicle. Aiming at the problem that the length of the axle 1 of the built-in wheelset does not meet the requirements, this embodiment installs a process shaft 3 at the end of the axle 1 to lengthen the overall length of the axle 1, and uses the process shaft 3 to cooperate with the wheelset press machine to achieve clamping; and a transition sleeve 6 is provided between the process shaft 3 and the axle 1. This embodiment lengthens the axle 1 by using the process shaft, and enables it to meet the clamping requirements of the wheelset press machine.

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

[0042] Preferably, the axle 1 of this embodiment is covered with a nylon sleeve 101; the brake disc 2 is mounted on the part of the axle 1 covered with the nylon sleeve 101. In order to prevent the brake disc 2 from colliding with the press-fit steel sleeve 4, the transition sleeve 6, the process shaft 3 and the axle 1, the nylon sleeve 101 is covered on the outside of the axle 1, and the size of the nylon sleeve 101 of this embodiment is adjusted according to the size of the press-fit 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 connecting part 302 whose cross-sectional dimensions match the axle 1, and the process shaft connecting part 302 is connected to the end of the axle 1 by bolts; and a process shaft press-fitting part 301 transitionally connected to the process shaft connecting part 302 by a transition part 303; wherein the transition part 303 of this embodiment is externally sleeved with a transition sleeve 6.

[0044] The transition sleeve 6 of this embodiment includes a transition portion matching structure 604 and a press-fit 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-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 .

[0046] Preferably, in order to realize 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 of this embodiment, 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 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 connection part 302.

[0047] In the above technical solution, the present invention provides a rail vehicle internal wheel set brake disc press-fitting structure, which 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 wheelset press-fitting machine can clamp it. The structural design of the process shaft 3 and the transition sleeve 6 eliminates the need to re-manufacture the wheelset press-fitting machine to press-fit the steel sleeve 4, thereby saving costs and improving press-fitting efficiency.

[0049] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection 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. A rail vehicle internal wheelset brake disc press-fit 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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