CN113428185A

CN113428185A - Primary suspension device

Info

Publication number: CN113428185A
Application number: CN202110698654.6A
Authority: CN
Inventors: 李小川; 贺世忠; 张骏; 张建全; 曾伟; 龚卫; 秦涛
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-09-24

Abstract

The invention provides a primary suspension device, which relates to the technical field of rail vehicles and comprises: two torsion bars and a swing arm are arranged on the framework; the middle parts of the torsion bars are bent sections, the two torsion bars are arranged in a crossed mode and are correspondingly connected with the swing arms, the inner ends of the swing arms are installed in the swing arm installation seats, and the outer ends of the swing arms are connected with wheel pairs through axle boxes. The present invention provides suspension stiffness using cross-disposed torsion bars without the use of conventional springs, thereby simplifying the bogie structure.

Description

Primary suspension device

Technical Field

The invention belongs to the technical field of railway vehicles, and particularly relates to a primary suspension device.

Background

The primary suspension device is widely applied to various vehicles such as railway freight cars, passenger cars, motor train units, subways and the like at home and abroad. The existing primary suspension is provided with a spring between an axle box and a framework, and generates acting force through the deformation of the spring, so that primary suspension rigidity is provided, but the primary suspension structure needs to be provided with spring mounting openings on the framework and the axle box body, so that the structure of the framework and the axle box body is more complex, and meanwhile, the height of the framework above the axle box body is higher, and the interference with a vehicle body is easy to occur.

Disclosure of Invention

The invention aims to provide a primary suspension device to solve the technical problems that a bogie is complex in structure and easy to interfere with a vehicle body due to the traditional primary suspension.

In order to solve the technical problems, the specific technical scheme of the invention is as follows:

a primary suspension, comprising: a torsion bar and a swing arm mounted on the frame;

the torsion bar is divided into a first torsion bar and a second torsion bar, and the first torsion bar and the second torsion bar are arranged in a crossed manner;

the swing arm is divided into a first swing arm, a second swing arm, a third swing arm and a fourth swing arm;

the framework is provided with a swing arm mounting seat, and the swing arm mounting seat is divided into a first swing arm mounting seat, a second swing arm mounting seat, a third swing arm mounting seat and a fourth swing arm mounting seat;

the inner end of the first swing arm is arranged in the first swing arm mounting seat, and the outer end of the first swing arm is connected with the first wheel pair through a first axle box;

the inner end of the second swing arm is arranged in the second swing arm mounting seat, and the outer end of the second swing arm is connected with the second wheel pair through the second axle box;

the inner end of the third swing arm is arranged in the third swing arm mounting seat, and the outer end of the third swing arm is connected with the first wheel pair through a third axle box;

the inner end of the fourth swing arm is arranged in the fourth swing arm mounting seat; the outer end of the fourth swing arm is connected with the second wheel pair through a fourth axle box;

the inner ends of the first swing arm and the fourth swing arm are fixedly connected with two ends of the first torsion rod respectively;

the inner ends of the second swing arm and the third swing arm are fixedly connected with two ends of a second torsion bar respectively.

Therefore, when the frame moves vertically relative to the wheel pair, the torsion bar is subjected to torsional deformation or other deformation under the action of the swing arm, and the acting force generated by the torsion bar deformation acts on the axle box through the swing arm so as to limit the vertical movement of the frame relative to the wheel pair and provide a series of suspension rigidity.

Furthermore, two ends of the first torque rod are installed in the first swing arm installation seat and the fourth swing arm installation seat through rubber joints or bearings; two ends of the second torsion bar are arranged in the second swing arm mounting seat and the third swing arm mounting seat through rubber joints or bearings; the torsion bar can be fixed on the framework by a rubber joint or other type of bearings, and the torsion bar can generate corresponding torsional deformation or other types of deformation under the driving of the swing arm.

Furthermore, the outer end of the swing arm is connected with the axle box through bolts, so that the swing arm and the axle box can be mounted and dismounted more conveniently.

In addition, the middle part of the torsion bar is a bending section, the bending section of the first torsion bar is a first bending section, and the bending section of the second torsion bar is a second bending section; the arc tops of the two bending sections are bent in the direction away from each other; preferably, the first curved section is curved upward, and the second curved section is curved downward; in order to prevent the two torsion bars from contacting each other at the intersection point, a bending section is provided at the middle of the torsion bars, and the arc tops of the bending sections of the two torsion bars are away from each other, so that the two torsion bars do not contact each other, thereby preventing the two torsion bars from interfering with each other.

Further, the lateral distance between the swing arm mounts is equal or substantially equal to the lateral width of the frame body; the longitudinal distance between the swing arm mounting seats is equal to or substantially equal to the longitudinal width of the framework main body; in the scheme, the transverse distance between the swing arm mounting seats is not strictly equal to the transverse width of the framework main body, and the transverse distance between the swing arm mounting seats can be slightly smaller than the transverse width of the framework main body; also in this solution the longitudinal distance between the swing arm mounts is not strictly equal to the longitudinal width of the frame body either, and the longitudinal distance between the swing arm mounts may be slightly smaller than the longitudinal width of the frame body.

The primary suspension device of the invention has the following advantages: 1) the deformation of the torsion bar is utilized to provide primary suspension stiffness, and a traditional spring is not needed to provide the primary suspension stiffness, so that a spring mounting interface does not need to be arranged on the axle box body and the framework, and the structure of the bogie is simplified. 2) The spring does not need to be arranged above the axle box body, so that the height of the bogie above the axle box body is reduced, and the problem that the traditional bogie is easily interfered by a vehicle body is avoided.

Drawings

FIG. 1 is a schematic view of a primary suspension system according to the present invention;

FIG. 2 is an exploded view of a primary suspension system of the present invention;

fig. 3 is a schematic structural view of a first torsion bar and a second torsion bar;

FIG. 4 is a front view of the present invention;

FIG. 5 is a side view of the present invention;

FIG. 6 is a bottom view of the present invention;

the notation in the figure is: 1. a torsion bar; 11. a first torsion bar; 12. a second torsion bar; 13. a first curved section; 14. a second curved section;

2. a rubber joint;

31. a first swing arm; 32. a second swing arm; 33. a third swing arm; 34. a fourth swing arm;

4. a frame;

41. a first swing arm mounting base; 42. a first swing arm mounting base; 43. a third swing arm mounting base;

44. a fourth swing arm mounting base;

51. a first pair of wheels; 52. a second pair of wheels;

61. a first axle box; 62. a second shaft box; 63. a third axle box; 64. and a fourth axle box.

Detailed Description

For a better understanding of the objects, structure and function of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

As shown in fig. 1, a suspension system of the present invention includes: a torsion bar 1 and a swing arm; the torsion bar and the swing arms are mounted on the frame 4, the torsion bar is arranged in a crossed manner and connected with the corresponding swing arm, and the torsion bar arranged in a crossed manner is utilized to provide suspension rigidity, so that a traditional spring is not required to be used, and the bogie structure is simplified.

As shown in fig. 2, the torsion bar is divided into a first torsion bar 11 and a second torsion bar 12, and the first torsion bar 11 and the second torsion bar 12 are arranged to cross.

The swing arms are divided into a first swing arm 31, a second swing arm 32, a third swing arm 33 and a fourth swing arm 34; the inner end of the swing arm is connected with the framework 4, and the outer end of the swing arm is connected with the wheel pair through the axle box.

A swing arm mounting seat is arranged on the framework 4 and is divided into a first swing arm mounting seat 41, a second swing arm mounting seat 42, a third swing arm mounting seat 43 and a fourth swing arm mounting seat 44; and a rubber joint 2 or other type of bearings are arranged in the swing arm mounting seat.

Specifically, the inner end of the first swing arm 31 is mounted in the first swing arm mounting seat 41, and the outer end of the first swing arm 31 is connected to the first wheel pair 51 through the first axle box 61;

the inner end of the second swing arm 32 is mounted in the second swing arm mounting seat 42, and the outer end of the second swing arm 32 is connected with the second wheel pair 52 through the second axle box 62;

the inner end of the third swing arm 33 is mounted in the third swing arm mounting seat 43, and the outer end of the third swing arm 33 is connected with the first wheel pair 51 through a third axle box 63;

the inner end of the fourth swing arm 34 is mounted in the fourth swing arm mounting seat 44; the outer end of the fourth swing arm 34 is connected with the second wheel pair 52 through a fourth axle box 64;

further, the first swing arm 31 and the fourth swing arm 34 are connected by the first torsion bar 11; the second swing arm 32 and the third swing arm 33 are connected by the second torsion bar 12.

As shown in fig. 3 and 4, as a preferred embodiment of the present invention, the torsion bar 1 has a bent portion at the middle, and after the two torsion bars are mounted to the bogie, the two torsion bars are bent in a direction away from each other at the apexes of the bent portions, and the bent portion of the one torsion bar is bent upward and the other torsion bar is bent downward, so that the two torsion bars are prevented from interfering with each other; in the present embodiment, the first bent section 13 of the first torsion bar 11 is bent upward, and the second bent section 14 of the second torsion bar 12 is bent downward.

The distance between the swing arm mounts is related to the structural design of the truck, and as shown in fig. 6, the transverse distance L1 between the swing arm mounts in this embodiment is approximately equal to the transverse width of the frame body, and the longitudinal distance L2 between the swing arm mounts is approximately equal to the longitudinal width of the frame body.

As shown in fig. 1 and 5, one end of the swing arm is connected to the axle box, the height of the one end does not change with the movement of the frame, and the other end is mounted on the frame through a rubber joint, and the height of the one end changes with the frame synchronously. Therefore, when the frame moves vertically relative to the wheel pair, the swing arms at the two ends of the same torsion bar rotate reversely, the torsion bar is subjected to torsional deformation or other forms of deformation under the action of the swing arms at the two ends, and the acting force generated by the deformation of the torsion bar acts on the axle box through the swing arms at the two ends. Two torsion bars are arranged on each bogie frame, and acting force generated by the two torsion bars acts on the four axle boxes through the four swing arms, so that a series of suspension rigidity is provided between the framework and the wheel pair.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A primary suspension device, comprising: a torsion bar (1) and a swing arm mounted on the frame (4);

the torsion bar (1) is divided into a first torsion bar (11) and a second torsion bar (12), and the first torsion bar (11) and the second torsion bar (12) are arranged crosswise;

the swing arms are divided into a first swing arm (31), a second swing arm (32), a third swing arm (33) and a fourth swing arm (34);

the lower end of the framework (4) is provided with a swing arm mounting seat which is divided into a first swing arm mounting seat (41), a second swing arm mounting seat (42), a third swing arm mounting seat (43) and a fourth swing arm mounting seat (44); the first swing arm mounting seat (41) and the second swing arm mounting seat (42) are positioned on the same side of the framework (4), and the third swing arm mounting seat (43) and the fourth swing arm mounting seat (44) are positioned on the other side of the framework (4);

the inner end of the first swing arm (31) is mounted in the first swing arm mounting seat (41), and the outer end of the first swing arm (31) is connected with a first wheel pair (51) through a first axle box (61);

the inner end of the second swing arm (32) is mounted in the second swing arm mounting seat (42), and the outer end of the second swing arm (32) is connected with a second wheel pair (52) through a second axle box (62);

the inner end of the third swing arm (33) is mounted in a third swing arm mounting seat (43), and the outer end of the third swing arm (33) is connected with the first wheel pair (51) through a third axle box (63);

the inner end of the fourth swing arm (34) is arranged in a fourth swing arm mounting seat (44); the outer end of the fourth swing arm (34) is connected with the second wheel pair (52) through a fourth axle box (64);

the inner ends of the first swing arm (31) and the fourth swing arm (34) are fixedly connected with two ends of the first torsion rod (11) respectively;

the inner ends of the second swing arm (32) and the third swing arm (33) are fixedly connected with two ends of the second torsion bar (12) respectively.

2. The primary suspension arrangement according to claim 1, characterized in that both ends of the first torque rod (11) are mounted in the first and fourth swing arm mounts (41, 44) by rubber joints (2) or bearings; two ends of the second torsion bar (12) are arranged in the second swing arm mounting seat (42) and the third swing arm mounting seat (43) through rubber joints (2) or bearings.

3. The primary suspension of claim 1, wherein outer ends of the swing arms are bolted to the axle housing.

4. A suspension system according to claim 1, wherein the torsion bar (1) is a bent section at the middle, the first torsion bar (11) is a first bent section (13), and the second torsion bar (12) is a second bent section (14); the arc tops of the two bending sections are arranged in a bending way in the direction away from each other.

5. A suspension arrangement according to claim 4, wherein the first curved section (13) is curved upwardly and the second curved section (14) is curved downwardly.

6. The primary suspension apparatus of claim 1 or 2, wherein the lateral distance between the swing arm mounts is equal to or substantially equal to the lateral width of the frame body; the longitudinal distance between the swing arm mounts is equal to or substantially equal to the longitudinal width of the frame body.