Integrated axle box body and axle box assembly structure

Abstract

The utility model provides an integrated axle box body which is located between a wheel and a permanent magnet direct drive motor in the axial direction of an axle and comprises an upper box body and a lower box body. The lower box body is detachably connected with the upper box body, the lower box body and the upper box body are connected to jointly define a containing cavity, and the containing cavity is matched with a bearing; a shock absorber connecting area is arranged at the top of the upper box body; a vertical shock absorber connecting base is arranged on the side face of the lower box body. Meanwhile, the utility model further provides an axle box assembling structure. Compared with the prior art, in the integrated axle box body and axle box assembly structure, the axle box body, the inner end cover and the outer end cover are integrated, the split type design is adopted in the axle box body, the number of parts is reduced, and the problems of operational process feasibility and maintenance convenience brought by an axle box built-in structure are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail vehicles, in particular to an integrated axle box body and an axle box assembly structure. Background Art

[0002] In the new generation of rail transit technology, the axle box built-in bogie structure has the characteristics of compact structure, light bogie weight, small wheel-rail force and thus reduced maintenance cost, while the permanent magnet direct drive technology has the characteristics of low energy consumption. However, both the axle box built-in structure and the permanent magnet motor direct drive structure occupy the space inside the wheelset, which brings corresponding requirements for the adaptability of the design of the axle box assembly structure.

[0003] Traditional axle box assembly solutions often achieve bearing positioning and maintenance by fastening the inner and outer end covers to the axle box body. Generally speaking, the installation and removal of the inner and outer end cover fastening bolts require a certain amount of lateral space, but due to the wheel drive structure, there is no lateral operating space for the axle box assembly, so the traditional axle box assembly solution cannot be adapted. In addition, due to the overall compact structure of the bogie solution, higher requirements are also placed on the compactness of the axle box structure. Utility Model Content

[0004] In view of the fact that the axle box in the prior art is usually a structure in which the inner and outer end covers are fastened to the axle box body, a certain lateral space is required during installation and disassembly, and it cannot adapt to the new space-compact bogie structure. The utility model provides an integrated axle box body, which integrates the axle box end cover and the axle box body into an integrated structure, and is designed as an upper and lower split axle box body, so that it can adapt to the narrow space between the wheel and the permanent magnet direct drive motor, and at the same time has both processability, reliability and maintainability.

[0005] An integrated axle box body, along the axial direction of the axle, the integrated axle box body is located between the wheel and the permanent magnet direct drive motor, and the integrated axle box body includes an upper box body and a lower box body;

[0006] The lower box body is detachably connected to the upper box body, and after being connected, the lower box body and the upper box body jointly form a receiving cavity, and the receiving cavity matches the bearing;

[0007] A shock absorber connection area is provided on the top of the upper box;

[0008] A vertical shock absorber connecting seat is arranged on the side of the lower box body.

[0009] Preferably, the upper box body is provided with a first connecting portion, and the lower box body is provided with a second connecting portion corresponding to the first connecting portion;

[0010] The first connecting portion and the second connecting portion are detachably connected via bolts and nuts.

[0011] Preferably, a positioning structure is provided between the first connecting part and the second connecting part, and the positioning structure includes a positioning pin and a positioning hole matching the positioning pin, the positioning pin is provided on one of the first connecting part and the second connecting part, and the positioning hole is provided on the other of the first connecting part and the second connecting part.

[0012] Preferably, a pull rod connecting seat is provided at the bottom of the lower box body; and a turning wheel interface is provided on the lower box body.

[0013] Preferably, a lifting interface is provided on the top of the upper box body.

[0014] An axle box assembly structure comprises a frame, an integrated axle box body and a bearing;

[0015] The integrated shaft box is connected to the frame, and the integrated shaft box adopts any one of the integrated shaft boxes described above;

[0016] The bearing is located inside the integrated axle box and is installed on the axle.

[0017] Preferably, a rubber spring is provided between the top of the upper box and the frame;

[0018] A vertical shock absorber is arranged between the lower box and the frame, and a pull rod is also arranged between the lower box and the frame.

[0019] Preferably, it further comprises a shaft ring, wherein the shaft ring comprises a first shaft ring and a second shaft ring;

[0020] The first shaft ring is located at one end of the bearing close to the permanent magnet direct drive motor;

[0021] The second shaft ring is located at an end of the bearing close to the wheel;

[0022] The inner ring of the bearing is positioned by the first shaft ring and the second shaft ring;

[0023] The bearing and the integrated shaft housing are clearance-fitted, and the outer ring of the bearing is positioned by combining the upper housing and the lower housing.

[0024] Preferably, a metal sealing stack ring is provided between the integrated shaft housing and the first shaft ring, and the integrated shaft housing, the first shaft ring and the metal sealing stack ring together form an inner sealing structure of the bearing;

[0025] A labyrinth seal is formed between the second shaft ring and the integrated shaft housing with a step structure, and the integrated shaft housing, the second shaft ring and the wheel together form an outer sealing structure of the bearing.

[0026] Preferably, water-spraying grooves are respectively provided on the outer sides of the wheel hub and the second shaft ring.

[0027] Compared with the prior art, the integrated axle box provided by the utility model is located between the wheel and the permanent magnet direct drive motor along the axial direction of the axle, and the integrated axle box includes an upper box and a lower box; the lower box is detachably connected to the upper box, and the lower box and the upper box are connected to form a receiving cavity together, and the receiving cavity matches the bearing; the top of the upper box is provided with a shock absorber connection area; the side of the lower box is provided with a vertical shock absorber connection seat. The integrated axle box is highly integrated, integrating the axle box and the inner and outer end covers. The split design of the axle box not only reduces the number of parts, but also solves the problem of operational process feasibility and maintenance convenience brought by the built-in structure of the axle box. In addition, the integrated axle box has a simple and compact structure, and has the characteristics of lightweight under the premise of meeting the high functional integration. At the same time, the upper box and the lower box can be connected to shock absorbers respectively, which can make the overall structural connection more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the position structure of an integrated axle box after assembly provided by an embodiment;

[0030] Figure 2 A schematic diagram of the three-dimensional structure of an axle box assembly structure provided by an embodiment;

[0031] Figure 3 A schematic diagram of the three-dimensional structure of an integrated axle box provided in an embodiment;

[0032] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the integrated shaft box in the structure shown. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. 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.

[0034] It should be noted that when a component is referred to as being "fixed on", "installed on" or "set on" another component, it can be directly on the other component or indirectly set on the other component; when a component is "connected" to another component, or a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0037] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0038] The utility model provides an integrated axle box, which is located between the wheel and the permanent magnet direct drive motor along the axial direction of the axle, and includes an upper box and a lower box; the lower box is detachably connected to the upper box, and after the lower box is connected to the upper box, they jointly form a containing cavity, and the containing cavity matches the bearing; the top of the upper box is provided with a shock absorber connection area; the side of the lower box is provided with a vertical shock absorber connection seat. The integrated axle box is highly integrated, integrating the axle box and the inner and outer end covers. The split design of the axle box not only reduces the number of parts, but also solves the problem of feasibility of the operation process and convenience of maintenance brought by the built-in structure of the axle box. In addition, the integrated axle box has a simple and compact structure, and has the characteristics of lightweight under the premise of meeting the high functional integration. At the same time, the upper box and the lower box can be connected to shock absorbers respectively, which can make the overall structural connection more stable and reliable.

[0039] Please refer to Figures 1 to 4 . This embodiment provides an integrated axle box 100 to solve the problem in the prior art that the traditional axle box cannot be installed due to limited lateral installation space. Along the axial direction of the axle 200, the integrated axle box 100 is located between the wheel 300 and the permanent magnet direct drive motor 400, and the integrated axle box 100 includes an upper box 10 and a lower box 20. Among them, the integrated axle box 100 refers to an integrated box structure in which the axle box end cover and the axle box are integrated, so that when assembling the integrated axle box 100, no lateral operating space is required.

[0040] The lower housing 20 is detachably connected to the upper housing 10, and after being connected, the lower housing 20 and the upper housing 10 jointly enclose a receiving cavity 30, and the receiving cavity 30 matches the bearing 500. In other words, the integrated shaft housing 100 is a split structure that can be separated from top to bottom. When installing or removing the integrated shaft housing 100, only a certain range of vertical space is required to realize the installation or removal of the integrated shaft housing 100, and no horizontal operating space is required, so that the integrated shaft housing 100 can better adapt to the installation application of the structure with limited horizontal space.

[0041] The top of the upper housing 10 is provided with a shock absorber connection area 11, and the side of the lower housing 20 is provided with a vertical shock absorber connection seat 21. By providing the shock absorber connection area 11 and the vertical shock absorber connection seat 21, the upper housing 10 and the lower housing 20 can be connected to shock absorbers respectively, so that after the integrated axle housing 100 is installed and used, the overall structural connection is more stable and reliable.

[0042] The integrated axle box 100 provided in this embodiment is highly integrated, integrating the axle box and the inner and outer end covers, and the upper and lower split design of the axle box not only reduces the number of parts, but also solves the problem of operational process feasibility and maintenance convenience brought by the built-in structure of the axle box. In addition, the overall structure is simple and compact, and has the characteristics of being lightweight while meeting the premise of highly integrated functions.

[0043] Preferably, in one embodiment, the upper box body 10 is provided with a first connecting portion 12, and the lower box body 20 is provided with a second connecting portion 22 corresponding to the first connecting portion 12. The first connecting portion 12 and the second connecting portion 22 are detachably connected by bolts and nuts. That is, in this embodiment, the lower box body 20 and the upper box body 10 are detachably connected by bolts and nuts, specifically, by opening connecting portions on the upper box body 10 and the lower box body 20, and bolts and nuts are installed at the connecting portions to achieve the connection between the lower box body 20 and the upper box body 10.

[0044] Specifically, in one embodiment, the first connection portion 12 is provided on the outer peripheral side surface of the upper box body 10, and the second connection portion 22 is provided on the outer peripheral side surface of the lower box body 20. More specifically, two first connection portions 12 are provided, and the two first connection portions 12 are provided on two opposite sides of the outer peripheral side surface of the upper box body 10; two second connection portions 22 are provided, and the two second connection portions 22 are provided on two opposite sides of the outer peripheral side surface of the lower box body 20. The first connection portion 12 and the second connection portion 22 are detachably connected by four sets of bolts and nuts.

[0045] Preferably, in one embodiment, a positioning structure 40 is provided between the first connection portion 12 and the second connection portion 22, and the positioning structure 40 includes a positioning pin and a positioning hole matching the positioning pin, the positioning pin is provided on one of the first connection portion 12 and the second connection portion 22, and the positioning hole is provided on the other of the first connection portion 12 and the second connection portion 22. For example, when the positioning pin is provided on the first connection portion 12, the positioning hole is provided on the second connection portion 22; when the positioning pin is provided on the second connection portion 22, the positioning hole is provided on the first connection portion 12.

[0046] Specifically, in one embodiment, the positioning pin is a conical pin. The upper box body 10 and the lower box body 20 are positioned by two conical pins.

[0047] Preferably, in one embodiment, a tie rod connection seat 23 is provided at the bottom of the lower box 20, so that the lower box 20 can be connected to the tie rod. A lathe wheel interface 24 is provided on the lower box 20. Through the opening of the lathe wheel interface 24, when lathe wheel is being lathed, the lower box 20 can correspond to the component structure required for installing the lathe wheel.

[0048] Preferably, in one embodiment, a hoisting interface 13 is provided on the top of the upper box 10, so as to reduce the difficulty of hoisting the upper box 10. Specifically, the internal integrated hoisting structure on the top of the upper box 10 constitutes the hoisting interface 13.

[0049] Meanwhile, in one embodiment, an axle box assembly structure is also provided, which includes a frame 600, an integrated axle box body 100, and a bearing 500. The integrated axle box body 100 is connected to the frame 600, and the bearing 500 is located inside the integrated axle box body 100 and installed on the axle 200.

[0050] Preferably, in one embodiment, a rubber spring 700 is provided between the top of the upper box 10 and the frame 600. A vertical shock absorber 800 is provided between the lower box 20 and the frame 600, and a pull rod 900 is also provided between the lower box 20 and the frame 600. Specifically, in one embodiment, the vertical shock absorber 800 is connected to the vertical shock absorber connection seat 21 on the side of the lower box 20, and the pull rod 900 is connected to the pull rod connection seat 23 at the bottom of the lower box 20.

[0051] Preferably, in one embodiment, the axle box assembly structure further includes a shaft ring 50, and the shaft ring 50 includes a first shaft ring 51 and a second shaft ring 52. The first shaft ring 51 is located at one end of the bearing 500 close to the permanent magnet direct drive motor 400, and the second shaft ring 52 is located at one end of the bearing 500 close to the wheel 300. The inner ring of the bearing 500 is positioned by the first shaft ring 51 and the second shaft ring 52. The bearing 500 and the integrated axle box body 100 are clearance-fitted, and the outer ring of the bearing 500 is positioned by the upper box body 10 and the lower box body 20. Through this structure, the position of the bearing 500 can be better positioned.

[0052] Preferably, in one embodiment, a metal sealing stack ring 60 is provided between the integrated shaft housing 100 and the first shaft ring 51, and the integrated shaft housing 100, the first shaft ring 51, and the metal sealing stack ring 60 together form the inner sealing structure of the bearing 500, that is, the upper housing 10, the lower housing 20, the first shaft ring 51, and the metal sealing stack ring 60 together constitute a sealing structure that seals the inner side of the bearing 500. A labyrinth seal is formed between the second shaft ring 52 and the integrated shaft housing 100 with a step structure, and the integrated shaft housing 100, the second shaft ring 52, and the wheel 300 together form the outer sealing structure of the bearing 500, that is, the upper housing 10, the lower housing 20, the second shaft ring 52, and the wheel 300 together constitute a sealing structure that seals the outer side of the bearing 500. Through this structure, the sealing effect of the bearing 500 can be better improved.

[0053] Preferably, in one embodiment, a water-spinning groove is provided on the outer side of the wheel hub of the wheel 300 and the second shaft ring 52. A reliable sealing structure can be formed between the integrated axle housing 100, the second shaft ring 52 and the wheel 300 through the design of the step structure and the water-spinning groove, which greatly improves the reliability of the operation of the bearing 500.

[0054] The above is only an implementation method of the present invention. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the protection scope of the present invention.

Claims

1. An integrated axle box, characterized in that: Along the axial direction of the axle, the integrated axle box is located between the wheel and the permanent magnet direct drive motor, and the integrated axle box includes an upper box and a lower box; The lower box body is detachably connected to the upper box body, and after being connected, the lower box body and the upper box body jointly form a receiving cavity, and the receiving cavity matches the bearing; A shock absorber connection area is provided on the top of the upper box; A vertical shock absorber connecting seat is arranged on the side of the lower box body.

2. The integrated axle box according to claim 1, characterized in that: The upper box body is provided with a first connecting portion, and the lower box body is provided with a second connecting portion corresponding to the first connecting portion; The first connecting portion and the second connecting portion are detachably connected via bolts and nuts.

3. The integrated axle box according to claim 2, characterized in that: A positioning structure is arranged between the first connecting part and the second connecting part, and the positioning structure includes a positioning pin and a positioning hole matching the positioning pin, the positioning pin is arranged on one of the first connecting part and the second connecting part, and the positioning hole is arranged on the other of the first connecting part and the second connecting part.

4. The integrated axle box according to claim 1, characterized in that: A pull rod connection seat is arranged at the bottom of the lower box body; and a turning wheel interface is arranged on the lower box body.

5. The integrated axle box according to claim 1, characterized in that: A lifting interface is arranged on the top of the upper box body.

6. An axle box assembly structure, characterized in that: Including frame, integrated shaft box, bearing; The integrated shaft box is connected to the frame, and the integrated shaft box adopts the integrated shaft box according to any one of claims 1 to 5; The bearing is located inside the integrated axle box and is installed on the axle.

7. The axle box assembly structure according to claim 6, characterized in that: A rubber spring is provided between the top of the upper box and the frame; A vertical shock absorber is arranged between the lower box and the frame, and a pull rod is also arranged between the lower box and the frame.

8. The axle box assembly structure according to claim 6, characterized in that: Also includes a shaft ring, the shaft ring includes a first shaft ring and a second shaft ring; The first shaft ring is located at one end of the bearing close to the permanent magnet direct drive motor; The second shaft ring is located at an end of the bearing close to the wheel; The inner ring of the bearing is positioned by the first shaft ring and the second shaft ring; The bearing and the integrated shaft housing are clearance-fitted, and the outer ring of the bearing is positioned by combining the upper housing and the lower housing.

9. The axle box assembly structure according to claim 8, characterized in that: A metal sealing stack ring is arranged between the integrated shaft housing and the first shaft ring, and the integrated shaft housing, the first shaft ring and the metal sealing stack ring together form an inner sealing structure of the bearing; A labyrinth seal is formed between the second shaft ring and the integrated shaft housing with a step structure, and the integrated shaft housing, the second shaft ring and the wheel together form an outer sealing structure of the bearing.

10. The axle box assembly structure according to claim 9, characterized in that: The wheel hub of the wheel and the outer side of the second shaft ring are respectively provided with water throwing grooves.

Images