Primary suspension system and railway vehicle

Abstract

The utility model discloses a primary suspension system and a railway vehicle. The primary suspension system comprises a framework; the axle box body is arranged on the inner side of the side beam of the framework; the two primary rubber springs are connected between the top of the axle box body and the framework and arranged side by side in the longitudinal direction of the framework, and each primary rubber spring is of at least two-layer conical structure formed by a metal layer and a rubber layer; and the lower mounting seat is of an integrated structure, the two primary rubber springs are respectively connected with the lower mounting seat, and the lower mounting seat is connected with the axle box body. The primary rubber spring is an axle box overhead type primary rubber spring, and is compact in structure and small in occupied space; the two primary rubber springs are connected into a whole through the lower mounting base of the integrated structure, so that the two primary rubber springs have good consistency and have enough wheel set axle box positioning rigidity and vertical rigidity. The primary rubber spring is of at least two-layer conical structure formed by a metal layer and a rubber layer, and the vertical rigidity, the transverse rigidity and the longitudinal rigidity of the primary rubber spring can be well matched.

Description

Technical Field

[0001] The utility model relates to the technical field of the primary suspension system of rail vehicles, and more specifically, to a primary suspension system. In addition, the utility model also relates to a rail vehicle including the above primary suspension system. Background Art

[0002] The primary suspension system of the axle-box built-in bogie is located inside the side beam of the bogie frame, and is restricted by the drive system, resulting in a particularly compact structural space for the primary suspension system.

[0003] In a related technology, the primary suspension system adopts a structure of a steel spiral spring + rocker arm positioning. However, this structure occupies too much space and cannot meet the space requirements for the miniaturization of the built-in bogie. In another related technology, the primary suspension system adopts a rubber spring. However, the coupling degree of the vertical stiffness, longitudinal stiffness and lateral stiffness of the rubber spring in the related technology is relatively large, and it is impossible to make the lateral, longitudinal and vertical stiffnesses match well.

[0004] Therefore, how to provide a primary suspension system that can make the lateral, longitudinal and vertical stiffnesses match well under small-space installation is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a primary suspension system that can be installed in a small space and can make the lateral, longitudinal and vertical stiffnesses match well.

[0006] Another purpose of the utility model is to provide a rail vehicle including the above primary suspension system, the primary suspension system of which can be installed in a small space and can make the lateral, longitudinal and vertical stiffnesses match well.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A primary suspension system, comprising:

[0009] A bogie frame;

[0010] An axle box body, arranged inside the side beam of the bogie frame;

[0011] Two primary rubber springs, connected between the top of the axle box body and the bogie frame, arranged side by side along the longitudinal direction of the bogie frame, and the primary rubber spring is at least a two-layer conical structure formed by a metal layer and a rubber layer;

[0012] A lower mounting seat, which is an integral structure, the two primary rubber springs are respectively connected to the lower mounting seat, and the lower mounting seat is connected to the axle box body.

[0013] Optionally, the two primary rubber springs and the lower mounting seat are connected together by a synchronous vulcanization process.

[0014] Optionally, one of the central part of the lower mounting seat and the top of the axle housing is provided with a side positioning guide post of the axle housing, and the other is provided with a side positioning hole of the axle housing that is matingly connected with the side positioning guide post of the axle housing.

[0015] Optionally, the top of the axle housing is provided with a mounting groove, and the lower part of the lower mounting seat is matingly connected with the mounting groove.

[0016] Optionally, the lower mounting seat is provided with a first process thread, and the first process thread is used to cooperate with a first process extractor during disassembly so that the first process extractor pushes against the axle housing.

[0017] Optionally, a frame side positioning guide post is connected to the central part of the primary rubber spring, and the frame is provided with a frame side mounting hole for matingly connecting with the frame side positioning guide post.

[0018] Optionally, a threaded hole is provided at the top of the frame side positioning guide post, and further includes a first mounting bolt that passes through the top of the frame side mounting hole and is threadedly connected to the threaded hole, and the head of the first mounting bolt is pressed against the frame by a gland.

[0019] Optionally, a limiting shoulder is provided on the outer peripheral part of the frame side positioning guide post, and an adjusting pad is provided between the limiting shoulder and the frame;

[0020] A second process thread is provided on the inner side of the top of the frame side mounting hole, and the second process thread is used to connect with a second process extractor so that the second process extractor applies pressure to the top end of the frame side positioning guide post.

[0021] Optionally, the frame side positioning guide post includes:

[0022] An inverted conical portion that is in interference fit connection with the inverted conical hole in the central part of the primary rubber spring. A groove is provided at the bottom of the inverted conical portion, and a preset distance is provided between the bottom end of the inverted conical portion and the top of the axle housing so that when the vertical displacement of the primary suspension system exceeds a preset value, the bottom end of the inverted conical portion contacts and limits the top of the axle housing;

[0023] A cylindrical portion that is matingly connected with the frame side mounting hole;

[0024] A transition portion is connected between the inverted conical portion and the cylindrical portion, the outer peripheral surface of the transition portion is an arcuate surface, and the radial dimension of the transition portion decreases first and then increases from one end close to the cylindrical portion to one end close to the inverted conical portion; the radial dimension of one end of the transition portion close to the inverted conical portion is smaller than the radial dimension of one end of the inverted conical portion close to the transition portion, so that the limit stop shoulder is formed between the transition portion and the inverted conical portion;

[0025] The conical portion is arranged at the top end of the cylindrical portion, and the radial dimension of the conical portion gradually increases from its top end to the end close to the cylindrical portion. The portion of the frame side mounting hole corresponding to the conical portion is provided with an expanded hole with a radially expanded dimension; the threaded hole is arranged in at least a portion of the conical portion and the cylindrical portion.

[0026] A rail vehicle comprises any one of the above-mentioned primary suspension systems.

[0027] The utility model provides a primary suspension system, in which an axle box body is arranged on the inner side of a side beam of a frame, so that the frame becomes an axle box built-in frame, and two primary rubber springs are connected between the top of the axle box body and the frame, so as to become an axle box top-mounted primary rubber spring. This arrangement mode has a compact structure and occupies a small space. In addition, two primary rubber springs are arranged side by side along the longitudinal direction of the frame, and the two primary rubber springs are connected as a whole through a lower mounting seat of an integrated structure to form an integral parallel double-cone rubber spring, so that the two primary rubber springs have good consistency, and the integral parallel double-cone rubber spring has sufficient wheelset axle box positioning stiffness and vertical stiffness. Furthermore, the primary rubber spring is a cone structure of at least two layers formed by a metal layer and a rubber layer, which can make the vertical stiffness of the primary rubber spring well matched with the lateral stiffness and the longitudinal stiffness, and is conducive to realizing the vertical stiffness, the lateral stiffness and the longitudinal stiffness respectively, thereby realizing a smaller vertical stiffness, a more moderate lateral stiffness and a larger longitudinal stiffness.

[0028] The rail vehicle provided by the utility model comprises the above-mentioned primary suspension system and has the same beneficial effects as the above-mentioned primary suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 A cross-sectional view of a suspension system provided by a specific embodiment of the utility model;

[0031] Figure 2 A cross-sectional view when the second process removal part of a series of suspension systems pushes against the top of the side positioning guide post of the frame;

[0032] Figure 3 A top view of a series of suspension systems (the frame is not shown).

[0033] Reference numerals:

[0034] 1 - Frame; 11 - Side mounting holes of the frame; 111 - Second process thread; 2 - Axle housing; 21 - Side positioning guide post of the axle housing; 22 - Mounting groove; 3 - Series of rubber springs; 31 - Side positioning guide post of the frame; 311 - Threaded hole; 312 - Inverted conical part; 313 - Cylindrical part; 314 - Transition part; 315 - Conical part; 316 - Groove; 4 - Lower mounting seat; 41 - First process thread; 5 - First mounting bolt; 6 - gland; 7 - Adjusting pad; 8 - Second process removal part; 9 - Second mounting bolt. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The core of the present invention is to provide a series of suspension systems that can achieve installation in a small space and can well match the lateral, longitudinal, and vertical stiffnesses. Another core of the present invention is to provide a rail vehicle including the above series of suspension systems, and its series of suspension systems can achieve installation in a small space and can well match the lateral, longitudinal, and vertical stiffnesses.

[0037] Please refer to Figure 1 , the embodiments of the present invention provide a series of suspension systems, including a frame 1, an axle housing 2, two series of rubber springs 3, and a lower mounting seat 4. The axle housing 2 is arranged inside the side beam of the frame 1; the two series of rubber springs 3 are connected between the top of the axle housing 2 and the frame 1 and are arranged side by side along the longitudinal direction of the frame 1. The series of rubber springs 3 are at least two-layer conical structures formed by a metal layer and a rubber layer; the lower mounting seat 4 is an integral structure, the two series of rubber springs 3 are respectively connected to the lower mounting seat 4, and the lower mounting seat 4 is connected to the axle housing 2.

[0038] It can be understood that the axle box body 2 is arranged on the inner side of the side beam of the frame 1, so that the frame 1 becomes an axle box built-in frame 1, and the two primary rubber springs 3 are connected between the top of the axle box body 2 and the frame 1, forming an axle box top-mounted primary rubber spring 3. This arrangement has a compact structure and occupies a small space; and by arranging two primary rubber springs 3 side by side along the longitudinal direction of the frame 1, and connecting the two primary rubber springs 3 as a whole through the lower mounting seat 4 of the integral structure, an integral parallel double-cone rubber spring is formed, so that The two primary rubber springs 3 have good consistency, and the integral parallel double-cone rubber spring has sufficient wheelset axle box positioning stiffness and vertical stiffness; further, the primary rubber spring 3 is a conical structure of at least two layers formed by a metal layer and a rubber layer, which can make the vertical stiffness of the primary rubber spring 3 well matched with the lateral stiffness and longitudinal stiffness, which is beneficial to realize the vertical stiffness, lateral stiffness and longitudinal stiffness respectively, thereby achieving smaller vertical stiffness, more moderate lateral stiffness and larger longitudinal stiffness.

[0039] It should be noted that the present embodiment does not limit the specific connection method between the primary rubber spring 3 and the lower mounting seat 4, as long as the connection between the two can be achieved. For example, the primary rubber spring 3 and the lower mounting seat 4 can be connected by interference fit.

[0040] In order to ensure the consistency of the rubber properties of the two primary rubber springs 3, in some embodiments, the two primary rubber springs 3 are connected to the lower mounting seat 4 through a synchronous vulcanization process. This is conducive to ensuring the consistency of the rubber properties of the two primary rubber springs 3. The specific synchronous vulcanization process can refer to the relevant technology, which will not be described in detail herein. The focus of the utility model is to use the integral structural member formed by the two primary rubber springs 3 and the lower mounting seat 4 connected together through the synchronous vulcanization process.

[0041] Please refer to Figure 1 In order to facilitate the rapid installation and positioning of the lower mounting seat 4, in some embodiments, one of the center of the lower mounting seat 4 and the top of the shaft box 2 is provided with a shaft box side positioning guide column 21, and the other is provided with a shaft box side positioning hole that is matched and connected with the shaft box side positioning guide column 21. That is, during installation, the shaft box side positioning guide column 21 is aligned and plugged with the shaft box side positioning hole to achieve rapid installation and positioning of the lower mounting seat 4.

[0042] Also, please refer to Figure 1, in some embodiments, an installation groove 22 is provided at the top of the axle housing 2, and the lower part of the lower mounting seat 4 is connected to the installation groove 22 in a matching manner. That is to say, during installation, the outer peripheral part of the lower end of the lower mounting seat 4 sinks into the installation groove 22, and the installation groove 22 is used to limit the lower mounting seat 4 in the horizontal direction, so as to realize the rapid installation and positioning of the lower mounting seat 4. At the same time, in cooperation with the connection between the positioning guide post 21 on the axle housing side and the positioning hole on the axle housing side, it is beneficial to improve the reliability and stability of the connection between the lower mounting seat 4 and the axle housing 2.

[0043] Please refer to Figure 2 , in order to further improve the reliability and stability of the connection between the lower mounting seat 4 and the axle housing 2, in some embodiments, the lower mounting seat 4 is connected to the axle housing 2 through fasteners. For example, the lower mounting seat 4 is connected to the axle housing 2 through the second mounting bolt 9.

[0044] In addition, please refer to Figure 2 , in some embodiments, the lower mounting seat 4 is provided with a first process thread 41, and the first process thread 41 is used to cooperate with the first process draw piece during disassembly so that the first process draw piece pushes against the axle housing 2. That is to say, when it is necessary to disassemble the lower mounting seat 4 and the axle housing 2, the first process draw piece is used to cooperate with the first process thread 41, so that the end of the first process draw piece generates a pushing force on the axle housing 2. Then, under the reaction force of this pushing force, the lower mounting seat 4 is separated from the axle housing 2.

[0045] In addition, please refer to Figure 1 , in order to facilitate the connection between the primary rubber spring 3 and the frame 1, in some embodiments, a frame side positioning guide post 31 is connected to the central part of the primary rubber spring 3, and the frame 1 is provided with a frame side mounting hole 11 for cooperating with the frame side positioning guide post 31. That is to say, in this embodiment, the connection between the primary rubber spring 3 and the frame 1 is realized through the cooperation between the frame side positioning guide post 31 and the frame side mounting hole 11. This connection method is simple and also facilitates the rapid installation and positioning of the primary rubber spring 3. It should be noted that the specific connection method between the primary rubber spring 3 and the frame side positioning guide post 31 in this embodiment is not limited, as long as the connection between the two can be realized. In some embodiments, the frame side positioning guide post 31 and the primary rubber spring 3 are connected by interference fit of the shaft and hole.

[0046] Further, please refer to Figure 1In order to improve the reliability of the connection between the primary rubber spring 3 and the frame 1, in some embodiments, a threaded hole 311 is provided on the top of the frame side positioning guide column 31, and the primary suspension system further includes a first mounting bolt 5 passing through the frame side mounting hole 11 and threadedly connected to the threaded hole 311, and the head of the first mounting bolt 5 is pressed on the frame 1 through the pressure cap 6. That is to say, after the frame side positioning guide column 31 is matched and connected with the frame side mounting hole 11, the first mounting bolt 5 is threadedly connected with the frame side positioning guide column 31, and the head of the first mounting bolt 5 is used to press the pressure cap 6, so that the pressure cap 6 presses the frame 1, thereby realizing the fastness of the primary rubber spring 3 and the frame 1 in the vertical direction, and improving the reliability of the connection between the primary rubber spring 3 and the frame 1.

[0047] For further information, please refer to Figure 1 and Figure 3 In some embodiments, a second process thread 111 is provided on the inner side of the top of the frame side mounting hole 11, and the second process thread 111 is used to connect with the second process withdrawal piece 8 during withdrawal, so that the second process withdrawal piece 8 applies pressure to the top of the frame side positioning guide column 31. In other words, when it is necessary to disassemble the primary rubber spring 3 and the frame 1, the second process withdrawal piece 8 cooperates with the second process thread 111, so that the end of the second process withdrawal piece 8 applies a squeezing force to the top of the frame side positioning guide column 31, which is conducive to the frame side positioning guide column 31 to be disengaged from the frame side mounting hole 11, thereby realizing the disassembly of the primary rubber spring 3 and the frame 1.

[0048] For further information, please refer to Figure 3 In some embodiments, a limit stop shoulder is provided on the outer periphery of the frame side positioning guide column 31, and an adjustment pad 7 is provided between the limit stop shoulder and the frame 1. It can be understood that, in this embodiment, by providing the adjustment pad 7 between the frame side positioning guide column 31 and the frame 1, it is beneficial to make the primary rubber spring 3 have a suitable height. In addition, in order to make the primary rubber spring 3 have different heights under different load conditions, the adjustment pad 7 can be increased, decreased or replaced by using the end of the second process withdrawal piece 8 to push the top of the frame side positioning guide column 31 through the cooperation of the second process withdrawal piece 8 and the second process thread 111. Moreover, this structure makes it possible to adjust the adjustment pad 7 by operating from above the frame 1, so that the adjustment operation of the adjustment pad 7 in a small space is convenient.

[0049] In some embodiments, the frame-side positioning guide post 31 includes an inverted conical portion 312, a cylindrical portion 313, a transition portion 314, and a conical portion 315. The inverted conical portion 312 is in interference fit connection with the inverted conical hole at the center of the primary rubber spring 3. A groove 316 is provided at the bottom of the inverted conical portion 312. There is a preset distance between the bottom end of the inverted conical portion 312 and the top of the axle box body 2, so that when the vertical displacement of the primary suspension system exceeds the preset value, the bottom end of the inverted conical portion 312 contacts and limits the position with the top of the axle box body 2; the cylindrical portion 313 is in fit connection with the frame-side mounting hole 11; the transition portion 314 is connected between the inverted conical portion 312 and the cylindrical portion 313. The outer peripheral surface of the transition portion 314 is an arc surface, and the radial dimension of the transition portion 314 first decreases and then increases from the end close to the cylindrical portion 313 to the end close to the inverted conical portion 312; the radial dimension of the end of the transition portion 314 close to the inverted conical portion 312 is smaller than the radial dimension of the end of the inverted conical portion 312 close to the transition portion 314, so as to form a limiting shoulder between the transition portion 314 and the inverted conical portion 312; the conical portion 315 is provided at the top end of the cylindrical portion 313, and the radial dimension of the conical portion 315 gradually increases from its top end to the end close to the cylindrical portion 313. The frame-side mounting hole 11 is provided with an enlarged hole with an outwardly expanding radial dimension corresponding to the conical portion 315; the threaded hole 311 is provided in at least part of the conical portion 315 and the cylindrical portion 313. This embodiment discloses a specific structure of the frame-side positioning guide post 31, which is convenient for installation, avoids structural interference on the basis of ensuring the connection of the frame-side positioning guide post 31 with the primary rubber spring 3 and the frame 1 respectively, and reduces the structural weight by setting the groove 316.

[0050] In addition to the above primary suspension system, the present utility model also provides a rail vehicle including the primary suspension system disclosed in the above embodiment. For the structures of other parts of the rail vehicle, reference may be made to the related art and will not be elaborated herein.

[0051] The focus of this embodiment is: including the primary suspension system disclosed in any one of the above embodiments, having the same beneficial effects as the above primary suspension system, which will not be elaborated herein.

[0052] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments may be referred to each other.

[0053] The above has introduced in detail a series of suspension systems and rail vehicles provided by the present utility model. Specific examples are used in this article to expound on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. A primary suspension system, characterized in that, Comprising: Frame (1); Axle box body (2), arranged inside the side beam of the frame (1); Two primary rubber springs (3), connected between the top of the axle box body (2) and the frame (1), arranged side by side longitudinally along the frame (1), and the primary rubber spring (3) is at least two-layer conical structure formed by a metal layer and a rubber layer; Lower mounting seat (4), which is an integral structure, and the two primary rubber springs (3) are respectively connected to the lower mounting seat (4), and the lower mounting seat (4) is connected to the axle box body (2).

2. The series of suspension systems according to claim 1, characterized in that, The two primary rubber springs (3) and the lower mounting seat (4) are connected together by a synchronous vulcanization process.

3. The series of suspension systems according to claim 1, characterized in that, One of the central part of the lower mounting seat (4) and the top of the axle box body (2) is provided with an axle box body side positioning guide post (21), and the other is provided with an axle box body side positioning hole that cooperates with the axle box body side positioning guide post (21).

4. The series of suspension systems according to claim 1, characterized in that, The top of the axle box body (2) is provided with a mounting groove (22), and the lower part of the lower mounting seat (4) is connected in cooperation with the mounting groove (22).

5. The series of suspension systems according to claim 1, characterized in that, The lower mounting seat (4) is provided with a first process thread (41), and the first process thread (41) is used to cooperate with a first process dismounting part during disassembly, so that the first process dismounting part pushes against the axle box body (2).

6. The series of suspension systems according to any one of claims 1-5, characterized in that, A frame side positioning guide post (31) is connected to the central part of the primary rubber spring (3), and the frame (1) is provided with a frame side mounting hole (11) for cooperating with the frame side positioning guide post (31).

7. The series of suspension systems according to claim 6, characterized in that, A threaded hole (311) is provided at the top of the frame side positioning guide post (31), and further includes a first mounting bolt (5) passing through the top of the frame side mounting hole (11) and threadedly connected to the threaded hole (311), and the head of the first mounting bolt (5) is pressed against the frame (1) through a gland (6).

8. The series of suspension systems according to claim 7, characterized in that, A limiting shoulder is provided on the outer peripheral part of the frame side positioning guide post (31), and an adjusting pad (7) is provided between the limiting shoulder and the frame (1); A second process thread (111) is provided on the inner side of the top of the frame side mounting hole (11), and the second process thread (111) is used to connect with a second process dismounting part (8), so that the second process dismounting part (8) applies pressure to the top end of the frame side positioning guide post (31).

9. The series of suspension systems according to claim 8, characterized in that, The frame side positioning guide post (31) includes: Inverted conical part (312), in interference fit connection with the inverted conical hole at the central part of the primary rubber spring (3), a groove (316) is provided at the bottom of the inverted conical part (312), and a preset distance is provided between the bottom end of the inverted conical part (312) and the top of the axle box body (2), so that when the vertical displacement of the primary suspension system exceeds the preset value, the bottom end of the inverted conical part (312) contacts and limits with the top of the axle box body (2); Cylindrical part (313), in cooperation with the frame side mounting hole (11); The transition part (314) is connected between the inverted conical part (312) and the cylindrical part (313). The outer peripheral surface of the transition part (314) is an arc surface, and the radial dimension of the transition part (314) first decreases and then increases from one end close to the cylindrical part (313) to one end close to the inverted conical part (312); the radial dimension of one end of the transition part (314) close to the inverted conical part (312) is smaller than the radial dimension of one end of the inverted conical part (312) close to the transition part (314), so as to form the limiting shoulder between the transition part (314) and the inverted conical part (312). The conical part (315) is arranged at the top end of the cylindrical part (313). The radial dimension of the conical part (315) gradually increases from its top end to one end close to the cylindrical part (313). The part of the frame side mounting hole (11) corresponding to the conical part (315) is provided with an enlarged hole with an outwardly expanding radial dimension; the threaded hole (311) is arranged in at least part of the conical part (315) and the cylindrical part (313).

10. An orbital vehicle, characterized in that, It includes a primary suspension system according to any one of claims 1-9.

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