CN115432024A

CN115432024A - Suspension mechanism for radial bogie

Info

Publication number: CN115432024A
Application number: CN202211142459.6A
Authority: CN
Inventors: 朱向阳; 李小燕; 刘宏; 肖博文; 陈莹莹
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-12-06
Anticipated expiration: 2042-09-20
Also published as: CN115432024B

Abstract

The invention discloses a suspension mechanism for a radial bogie, wherein the radial bogie comprises a transitional coupling pull rod, a crank arm and a coupling pull rod, the suspension mechanism comprises an inverted U-shaped suspension seat, a framework mounting seat, a roller mounting seat and a roller, the inverted U-shaped suspension seat is fixedly arranged on the upper surface of the transitional coupling pull rod, the framework mounting seat is arranged at the position of the framework corresponding to the inverted U-shaped suspension seat, the roller mounting seat is mounted below the framework mounting seat through a fastening piece, the roller is mounted on the roller mounting seat, the inverted U-shaped suspension seat is hung on the roller, and the surface of the inverted U-shaped suspension seat, which is in contact with the roller, is a plane. The invention can well support the weight of the overhanging part of the radial device, eliminate the rapid abrasion of the crank arm hinge part caused by the deflection moment caused by self weight, and has good adaptability and adjustability.

Description

Suspension mechanism for radial bogie

Technical Field

The invention relates to a suspension mechanism for a radial bogie, and belongs to the technical field of railway vehicle bogies.

Background

When a railway locomotive bogie passes through a curve, the railway locomotive bogie must be guided by wheel flanges to ensure that the bogie runs along a track. At this time, the lateral contact between the rail side and the wheel rim causes the surface to be squeezed and rubbed, resulting in the wear of the wheel rail. The factors influencing the abrasion are mainly the impact angle of the wheel pair and the transverse force of the wheel rail. The conventional locomotive bogie wheel set cannot rotate relative to the frame, so that when passing through a curved track, a larger angle of attack is formed between the wheel set and the track, thereby generating additional wheel track abrasion, and the smaller the curve radius is, the more obvious the situation is. Therefore, the method is designed to reduce the wheel pair attack angle and the wheel rail transverse force when the locomotive passes through a curve, reduce the abrasion of the wheel rail and has important significance for reducing the operation and maintenance cost of the railway locomotive.

The problem can be solved well by mounting the radial device on the locomotive bogie. Radial devices have a wide variety of configurations. The applicant's prior patent discloses a locomotive three-axle radial bogie (application No.: 201410001156.1), which is a self-steering radial device of the underneath type, comprising a pivot, a front steering beam, a longitudinal shock absorber, a transition coupling tie rod, a support rod, a crank arm, a coupling tie rod and a rear steering beam. The front guide beam and the front end beam of the framework, the rear guide beam and the rear end beam of the framework are connected through pivots, and the front guide beam and the rear guide beam can rotate around the pivots; the two ends of the front guide beam and the rear guide beam are both connected with longitudinal dampers, one end part of each longitudinal damper is connected with the framework, and each longitudinal damper is used for mitigating rotation impact; the transition coupling pull rod is arranged between the front guide beam and the crank arm; the support rod is used for supporting the weight of the transitional coupling pull rod to prevent excessive deformation and increase the stability of the compression rod; the crank arm is arranged on a lower support of the middle cross beam of the framework and can rotate; the coupling pull rod is arranged between the crank arm and the rear guide beam; when the bogie passes through a curve, the bogie is assumed to move forwards, and the rotation (deflection) of one wheel pair is transmitted to the three-position wheel pair through the front guide beam, the transition coupling pull rod, the crank arm, the coupling pull rod and the rear guide beam in sequence to enable the three-position wheel pair to rotate reversely, so that each wheel pair of the bogie tends to a radial position at the same time, the impact angle of the wheel pair is reduced, and the effect of reducing the abrasion of a wheel rim is achieved.

In the radial device, one end of the connecting lever 1 is hinged with the mounting seat of the framework, as shown in fig. 1, the connecting lever 1 is of a cantilever structure, the dead weight of a cantilever part is relatively large, and under the action of the transitional coupling pull rod and the coupling pull rod, the connecting lever 1 can naturally droop, so that the connecting lever 1 is in contact with the side surface of the framework mounting seat at the hinge point and generates relatively large additional deflection moment, and the rapid abrasion of the hinge part is easily caused. In order to improve the stability of radial device, reduce the maintenance number of times, need solve the problem of turning arm pin joint rapid wear badly.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention provides a suspension mechanism for a radial bogie, which is beneficial to supporting the weight of a suspension part of a radial device and preventing a hinge part from being rapidly worn due to deflection moment caused by self weight.

A suspension mechanism for a radial bogie comprises a radial device positioned below a framework, wherein the radial device comprises a front guide beam, a transition coupling pull rod, a crank arm, a coupling pull rod and a rear guide beam, the front guide beam and the rear guide beam are respectively hinged with the framework, one end of the transition coupling pull rod is hinged with the front guide beam, the other end of the transition coupling pull rod is hinged with the crank arm, and the crank arm is horizontally hinged and installed below the framework; one end of the coupling pull rod is hinged with the rear guide beam, and the other end of the coupling pull rod is hinged with the crank arm;

the method is characterized in that: suspend mechanism in midair including the type of falling U and hang seat, framework mount pad, gyro wheel mount pad and gyro wheel, the last fixed surface of transition coupling pull rod is provided with the type of falling U hangs the seat, the framework corresponds the position that the type of falling U hung the seat is provided with the framework mount pad, the gyro wheel mount pad pass through the fastener install in framework mount pad below, install on the gyro wheel mount pad the gyro wheel, the type of falling U hangs the seat and hangs on the gyro wheel, the type of falling U hang the seat with the surface of gyro wheel contact is the plane.

By adopting the technical scheme, the suspension mechanism suspends and supports the transition coupling pull rod, so that the crank arm is prevented from being abraded at the joint part of the crank arm under the action of gravity, the stability of the whole radial device is improved, and the maintenance period is prolonged. The suspension mechanism can well keep the transition coupling pull rod in the motion in the horizontal plane, so that the motion of the whole radial device is more reasonable.

Furthermore, the inverted U-shaped hanging seat is arranged close to the crank arm. The inverted U-shaped hanging seat arranged close to the crank arm can provide good supporting effect, and the suspension mechanism is provided with enough space, so that the rotation of the crank arm cannot be influenced.

Furthermore, an adjusting pad is arranged between the framework mounting seat and the roller mounting seat, and the fastening piece is a bolt. The adjusting pad is used for adjusting the mounting height of the roller mounting seat, so that the suspension mechanism is in a reasonable position. In this position, the crank arms of the radial device are horizontal. In addition, the adjusting pad serves to compensate for radial wear of the roller.

Furthermore, the roller mounting seat is provided with an inverted U-shaped cavity with a downward opening, the roller is mounted in the inverted U-shaped cavity, and the inverted U-shaped hanging seat is hung on the roller and penetrates through the inverted U-shaped cavity. The inverted U-shaped hanging seat is limited in the inverted U-shaped cavity body, so that the inverted U-shaped hanging seat can be prevented from falling off accidentally, and the reliability of the hanging mechanism is improved.

Further, the suspension mechanism comprises a support shaft, the support shaft horizontally penetrates through the roller mounting seat, and the roller is sleeved on the support shaft. Preferably, a joint bearing is fixedly arranged on the supporting shaft, and the roller is sleeved outside the joint bearing. The knuckle bearing can adapt to small-angle deflection.

The invention has simple and reliable structure, can well support the weight of the overhanging part of the radial device, eliminates the rapid abrasion of the crank arm hinge part caused by the deflection moment caused by self weight, and has good adaptability and adjustability.

Drawings

FIG. 1 is a crank arm schematic of a prior art radial device;

FIG. 2 is a front view of the radial truck of the present invention;

FIG. 3 is a schematic top view of the radial bogie of the present invention (the frame is shown in phantom);

fig. 4 is an enlarged schematic view of a region a (suspension mechanism) in fig. 2;

fig. 5 is a sectional view of the suspension mechanism.

In the figure: the device comprises a crank arm 1, a front guide beam 2, a transition coupling pull rod 3, a coupling pull rod 4, a rear guide beam 5, a framework 6, a longitudinal shock absorber 7, an axle box pull rod 8, an axle box 9, an inverted U-shaped hanging seat 10, a framework mounting seat 11, a roller mounting seat 12, an inverted U-shaped cavity body 12.1, a roller 13, a bolt 14, an adjusting pad 15, a support shaft 16 and a joint bearing 17.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

Referring to fig. 2-5, the radial bogie comprises a radial device located below a framework 6, the radial device comprises a front guide beam 2, a transition coupling pull rod 3, a crank arm 1, a coupling pull rod 4 and a rear guide beam 5, the middle parts of the front guide beam 2 and the rear guide beam 5 are respectively hinged with the framework 6, two ends of the front guide beam 2 are connected to the framework 6 through longitudinal dampers 7, two ends of the rear guide beam 5 are also connected to the framework 6 through longitudinal dampers 7, and the front guide beam 2 and the rear guide beam 5 are also connected with corresponding axle boxes 9 through axle box pull rods 8; one end of the transition coupling pull rod 2 is hinged with the front guide beam 2, the other end of the transition coupling pull rod is hinged with the crank arm 1, and the crank arm 1 is horizontally hinged and installed below the framework 6; one end of the coupling pull rod 4 is hinged with the rear guide beam 5, and the other end is hinged with the crank arm 1; the extending direction of the transitional coupling pull rod 3 is approximately parallel to the longitudinal center line of the framework 6, the extending direction of the crank arm 1 is approximately perpendicular to the longitudinal center line of the framework 6, and the hinge point of the transitional coupling pull rod 3 and the front guide beam 2 and the hinge point of the coupling pull rod 4 and the rear guide beam 5 are respectively positioned on two sides of the longitudinal center line of the framework 6.

When the bogie passes through a curve, the bogie is assumed to be forward-going, the rotation (deflection) of one wheel set (front wheel set) is transmitted to the rear wheel set through the front guide beam 2, the transition coupling pull rod 3, the crank arm 1, the coupling pull rod 4 and the rear guide beam 5 in sequence to enable the rear wheel set to rotate reversely, so that each wheel set of the bogie tends to the radial position at the same time, the impact angle of the wheel set is reduced, and the effect of reducing the abrasion of a wheel rim is achieved.

Referring to fig. 2, 4 and 5, the suspension mechanism comprises an inverted U-shaped hanging seat 10, a framework mounting seat 11, a roller mounting seat 12 and a roller 13, the inverted U-shaped hanging seat 10 is fixedly arranged on the upper surface of the transition coupling pull rod 3, the inverted U-shaped hanging seat 10 is arranged close to the crank arm 1, the framework 6 is provided with the framework mounting seat 11 corresponding to the inverted U-shaped hanging seat, the roller mounting seat 12 is mounted below the framework mounting seat 11 through a bolt 14 (an example of a fastener), and an adjusting pad 15 is arranged between the framework mounting seat 11 and the roller mounting seat 12;

the roller mounting seat 12 is provided with an inverted U-shaped cavity body 12.1 with a downward opening, the supporting shaft 16 horizontally penetrates through the roller mounting seat 12, the supporting shaft 16 is fixedly provided with a joint bearing 17, a roller 13 is sleeved outside the joint bearing 17, the roller 13 is mounted in the inverted U-shaped cavity body 12.1, the roller 13 can rotate relative to the supporting shaft 16, the inverted U-shaped hanging seat 10 is hung on the roller 13 and penetrates through the inverted U-shaped cavity body 12.1, the surface of the inverted U-shaped hanging seat 10, which is in contact with the roller 13, is a plane, and the supporting shaft 16 can be a screw rod. When the bogie runs on a complete track, the front guide beam 2 rotates relative to the framework 6 to drive the transition coupling pull rod 3 to move horizontally, and the roller 13 is adapted to the movement of the inverted U-shaped hanging seat 10 of the transition coupling pull rod 3 through rolling.

Wherein, joint bearing can adapt to small-angle beat. The inverted U-shaped hanging seat 10 is limited in the inverted U-shaped cavity 12.1, so that the inverted U-shaped hanging seat 10 can be prevented from falling off accidentally, and the reliability of the hanging mechanism can be improved.

By adopting the technical scheme, the suspension mechanism suspends the transition coupling pull rod in a suspension manner to prevent the crank arm from accelerating the abrasion of the crank arm intersection part under the action of gravity, so that the stability of the whole radial device is improved, and the maintenance period is prolonged. The suspension mechanism can well keep the transition coupling pull rod in the motion in the horizontal plane, so that the motion of the whole radial device is more reasonable.

The adjusting pad 15 is used for adjusting the installation height of the roller wheel installation seat, so that the suspension mechanism is in a reasonable position. In this position, the crank arm of the radial device is horizontal. In addition, the adjusting pad serves to compensate for radial wear of the roller.

The suspension mechanism does not directly suspend and support the crank arm 1, and can reasonably utilize the space below the framework and prevent the mutual interference of all components.

The radial device of the present application can be applied to a three-axle radial bogie (solution of the background art, application number:

201410001156.1) can also be applied to two-axle radial bogies.

The embodiments of the present invention are described above with reference to the drawings, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention is not intended to be limited to the embodiments shown above, which are intended to be illustrative rather than limiting, and many modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A suspension mechanism for a radial bogie comprises a radial device located below a framework (6), the radial device comprises a front guide beam (2), a transitional coupling pull rod (3), a crank arm (1), a coupling pull rod (4) and a rear guide beam (5), the front guide beam (2) and the rear guide beam (5) are respectively hinged with the framework (6), one end of each transitional coupling pull rod (4) and one end of each transitional coupling pull rod (3) are hinged with the front guide beam (2), the other end of each transitional coupling pull rod is hinged with the crank arm (1), and the crank arm (1) is horizontally hinged and installed below the framework (6); one end of the coupling pull rod (4) is hinged with the rear guide beam (5), and the other end of the coupling pull rod is hinged with the crank arm (1);

the method is characterized in that: the suspension mechanism comprises an inverted U-shaped suspension seat (10), a framework mounting seat (11), a roller mounting seat (12) and rollers (13), the upper surface of the transition coupling pull rods (4) and (3) is fixedly provided with the inverted U-shaped suspension seat (10), the framework (6) corresponds to the position of the inverted U-shaped suspension seat (10) is provided with the framework mounting seat (11), the roller mounting seat (12) is installed below the framework mounting seat (11) through a fastening piece, the rollers (13) are installed on the roller mounting seat (12), the inverted U-shaped suspension seat (10) is hung on the rollers (13), and the surface of the inverted U-shaped suspension seat (10) in contact with the rollers (13) is a plane.

2. A suspension mechanism for a radial bogie according to claim 1, characterized in that the inverted U-shaped suspension socket (10) is arranged close to the crank arm (1).

3. A suspension mechanism for a radial bogie according to claim 1, characterised in that a spacer (15) is provided between the frame mounting (11) and the roller mounting (12) and the fastener is a bolt (14).

4. A suspension mechanism for a radial bogie according to claim 1, wherein the roller mounting seat (12) has an inverted U-shaped cavity opening downwards, the roller (13) is mounted in the inverted U-shaped cavity, and the inverted U-shaped suspension seat (10) is suspended on the roller (13) and passes through the inverted U-shaped cavity.

5. A suspension mechanism for a radial bogie according to claim 4, characterised in that the suspension mechanism comprises a support shaft (16), the support shaft (16) extends horizontally through the roller mounting seat (12), and the roller (13) is arranged on the support shaft (16).

6. A suspension mechanism for a radial bogie according to claim 5, characterised in that a knuckle bearing (17) is fixedly arranged on the supporting axle (16), and the rollers (13) are sleeved outside the knuckle bearing (17).