CN112590849A

CN112590849A - Railway wagon bogie braking device and bogie

Info

Publication number: CN112590849A
Application number: CN202011438117.XA
Authority: CN
Inventors: 涂智文; 刘凤伟; 姜瑞金; 徐勇; 张金发; 陈祖顺; 曾德凉; 周乐; 韩亚培; 胡文涛; 陈瑞
Original assignee: CRRC Yangtze Co Ltd
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-04-02

Abstract

The invention discloses a railway wagon bogie braking device and a bogie, relates to the technical field of railway wagon braking, and solves the technical problems that compressed air is easy to leak, poor in relieving performance and prone to weakening of braking force when wheels are braked by compressed air. The railway wagon bogie braking device comprises two groups of brake beams symmetrically arranged on a bogie and a telescopic assembly connected with the two groups of brake beams, wherein the telescopic assembly comprises a telescopic sleeve and a telescopic rod piece which are driven by threads, the telescopic sleeve is connected with one group of brake beams, and the telescopic rod piece is connected with the other group of brake beams. The invention drives the brake beam to move through the telescopic assembly, and the telescopic assembly is used as driving energy through a mechanical mode of thread driving between the telescopic sleeve and the telescopic rod piece, thereby avoiding the problem of stroke change of a brake piston caused by fatigue and abrasion of a rear part after long-time application, avoiding the problem of gas leakage and ensuring that the output of the bogie brake device is more stable.

Description

Railway wagon bogie braking device and bogie

Technical Field

The invention relates to the technical field of railway wagon braking, in particular to a railway wagon bogie braking device and a bogie.

Background

The prior railway wagon adopts compressed air as driving energy, and a brake shoe is driven to be close to a wheel through an air brake cylinder so as to brake the wheel. In order to keep the brake piston stroke from increasing with the abrasion of wheels and brake shoes, the existing bogie integrated brake device generally adopts a brake shoe slack adjuster, so that the system structure is relatively complex. Meanwhile, as the rigidity and the clearance of each related part of the vehicle are changed after the vehicle is used, even if the brake shoe clearance adjuster is used, the stroke of the brake piston is still changed to a certain degree, the stable output is difficult, the problem of weakened braking force is possibly caused, and potential safety hazards are caused to the running of the vehicle, particularly the running on a long and steep downhill slope. In addition, the cylinder body, the sealing ring, the piston and other sealing parts of the air brake cylinder all need high sealing performance, the manufacturing requirement is high, the quality of the parts is not easy to control, a sealing leakage fault exists, and the normal transportation of a train can be affected in a serious condition.

On the other hand, in order to simplify the structure and maintain the parking function, the conventional bogie integrated brake device is often added with a hand brake device, thereby causing the problem of complex bogie structure. Because the influence of the structure of the reset spring is relieved in the cylinder body, the relieving force is small in the relieving end stage, and the resistance is further increased by the heavier chain and the pull rod of the hand braking device, so that the problems of bad relieving, brake shoe slag generation and wheel damage are solved. In addition, in order to ensure that the vehicle does not slide after being parked, the conventional railway wagon is additionally provided with a hand brake so as to ensure that the vehicle can still be parked for a long time under the condition of not using compressed air. However, the manual brake needs manual operation, the field workload is large, and misoperation is easy to occur.

Disclosure of Invention

In view of the above, the present invention is directed to overcome the defects in the prior art, and in a first aspect, a brake device for a bogie of a railway wagon is provided to solve the technical problems that compressed air is easy to leak, performance is poor, and braking force is easy to weaken when a wheel of an existing railway wagon is braked by compressed air.

The technical scheme adopted by the invention for solving the technical problem is as follows:

a railway freight car truck brake rigging mounted on a truck for braking a wheel, comprising:

the two groups of brake beams are symmetrically arranged on the bogie at two sides close to the wheels, and two ends of each brake beam are connected with brake shoes for braking the wheels; and the number of the first and second groups,

the telescopic assembly comprises a telescopic sleeve and a telescopic rod piece which are in threaded transmission, the telescopic sleeve is connected with one group of the brake beams, and the telescopic rod piece is connected with the other group of the brake beams;

the two groups of brake beams are in transmission and extension through the threads of the telescopic sleeve and the telescopic rod piece so as to drive the brake shoes to be close to or far away from the wheels.

On the basis of the technical scheme, the railway wagon bogie braking device can be further improved as follows.

Optionally, the telescopic sleeve is connected with a transmission shell, a transmission assembly is arranged in the transmission shell, a thread assembly is arranged in the telescopic sleeve, the transmission assembly is connected with the thread assembly, the thread assembly is connected with the telescopic rod piece, the transmission shell is connected with a driving motor for driving the transmission assembly to move, and the telescopic rod piece drives the thread assembly to move in the telescopic sleeve in a telescopic mode through the transmission assembly.

Optionally, the transmission assembly comprises a worm wheel and a worm, the worm wheel is meshed with the worm, the worm is fixedly connected with the output end of the driving motor, and the worm wheel is connected with the thread assembly.

Optionally, the threaded component includes screw rod and nut, the screw rod with nut threaded connection, the turbine with the screw rod key-type connection, flexible member with the nut is connected fixedly, flexible member sliding connection in the telescope tube, the screw rod passes through the nut drives flexible member motion.

Optionally, the axial direction of the telescopic sleeve and the telescopic rod piece is arranged at the end of the transmission shell, a first connector is connected to the axial direction of the telescopic sleeve and the telescopic rod piece, a second connector is connected to the end of the telescopic rod piece, and the two groups of brake beams are respectively connected with the telescopic assembly through the first connector and the second connector.

Optionally, the brake beam includes a main beam and a secondary beam, an upright is connected between the main beam and the secondary beam, the upright is hinged with a brake lever, the telescopic assembly is hinged with the brake lever, and the brake lever is connected with a brake chain for connecting with the bogie.

Optionally, a first hinge hole used for hinging the stand column, a second hinge hole used for hinging the telescopic assembly and a third hinge hole used for hinging the brake chain are formed in the brake lever, the first hinge hole and the third hinge hole are respectively formed in two ends of the brake lever, and the second hinge hole is located between the first hinge hole and the third hinge hole.

Optionally, the brake lever is located the one end of stand has still seted up the anticreep hole, first hinge hole is located the second hinge hole with between the anticreep hole, the downthehole anticreep round pin of installing of anticreep, wear to be equipped with in the anticreep round pin and prevent the anticreep round pin breaks away from the split pin in anticreep hole.

Optionally, the cross-section of the brake lever is i-shaped, and the i-shaped cross-section is located between the first hinge hole and the second hinge hole and between the second hinge hole and the third hinge hole.

Optionally, the two ends of the main beam are respectively provided with a sliding block, the sliding blocks are embedded on the bogie, and the brake shoes are installed in the sliding blocks.

In a second aspect, the invention further provides a bogie, which comprises a swing bolster and the railway wagon bogie braking device, wherein the two groups of braking beams are symmetrically arranged on two sides of the swing bolster.

Compared with the prior art, the railway wagon bogie braking device provided by the invention has the beneficial effects that:

according to the invention, the brake beam is driven to move by the telescopic assembly, the telescopic assembly is used as driving energy through a mechanical mode of thread transmission between the telescopic sleeve and the telescopic rod piece, compared with the mode that compressed air is used as driving energy in the existing railway wagon, the problem of stroke change of a brake piston caused by fatigue and abrasion of a rear part after long-time application is avoided, and the problem of gas leakage is avoided, so that the output of the bogie brake device is more stable, the system is simpler and more reliable, the energy consumption is clean, and the technical problems that compressed air is easy to leak, the release performance is poor and the braking force is easy to weaken when wheels are braked by compressed air in the existing railway wagon are solved. In addition, the manufacturing requirements of all parts of the bogie brake device are reduced, and the machining and manufacturing of sealing parts such as a cylinder body, a sealing ring and a piston of an air brake cylinder are avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a truck brake rigging for a railway freight car according to the present invention;

FIG. 2 is a schematic front view of the truck brake rigging of the railway freight car of the present invention;

FIG. 3 is a cross-sectional structural schematic view of the retraction assembly of FIG. 1;

FIG. 4 is a cross-sectional structural schematic view of the transmission assembly of FIG. 3;

FIG. 5 is a front view of the brake lever of FIG. 1;

fig. 6 is a schematic sectional view of the brake lever of fig. 1.

In the figure:

11-main beam; 12-secondary beam; 13-upright column; 201-a first connector; 202 — a second connector; 21-a telescopic sleeve; 22-telescopic rod member; 23-a transmission housing; 24-a drive motor; 25-a turbine; 26-a worm; 27-screw rod; 28-a nut; 30-a brake lever; 301-anti-drop pin; 302 — cotter pin; 31 — a first hinge hole; 32-a second hinge hole; 33 — a third hinge hole; 34-anti-drop holes; 35-i-section; 40-brake shoes; 41-a slide block; 50-brake chain.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention and are not to be taken as a comprehensive embodiment. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Example (b):

the invention provides a railway wagon bogie brake device, which comprises a brake beam, a telescopic assembly, a brake shoe 40 and a brake chain 50, as shown in figures 1 to 6. Two groups of brake beams are symmetrically arranged at the positions, close to wheels, of the two sides of a swing bolster of the bogie, brake shoes 40 are connected to the two ends of each group of brake beams, four groups of brake shoes 40 are arranged, and the telescopic assemblies are connected between the two groups of brake beams. The telescopic assembly comprises a telescopic sleeve 21 and a telescopic rod piece 22 which are driven by threads, the telescopic sleeve 21 is connected with one group of brake beams, and the telescopic rod piece 22 is connected with the other group of brake beams. The two groups of brake beams are driven to extend and retract through the threads between the telescopic sleeve 21 and the telescopic rod piece 22, and the four groups of brake shoes 40 are driven to be close to or far away from the wheels so as to brake or relieve the wheels. One end of the brake chain 50 is connected to the brake beam and the other end is connected to the bolster on the bogie.

As shown in fig. 1 and 2, the brake beam includes a main beam 11 and a sub beam 12. The secondary beam 12 is in a triangular arch structure, and two ends of the main beam 11 are fixedly connected with two ends of the secondary beam 12 in a welding or bolt connection mode. The two ends of the main beam 11 are respectively provided with a sliding block 41, the bogie is provided with a guide track for guiding the sliding block 41, the sliding block 41 is embedded in the guide track, and the brake shoe 40 is installed in the sliding block 41. An upright post 13 is connected between the arch top of the secondary beam 12 and the main beam 11 in a welding or bolt connection mode, the middle part of the upright post 13 is hinged with a brake lever 30, the telescopic assembly is hinged with the middle part of the brake lever 30, and a brake chain 50 is hinged at the other end of the brake lever 30. Of course, depending on the size of the bogie space, the secondary beam 12 can also be designed as a straight beam.

As shown in fig. 3 and 4, the telescopic assembly further includes a transmission housing 23, the transmission housing 23 is fixedly connected to the telescopic sleeve 21, a transmission assembly is disposed in the transmission housing 23, and a threaded assembly is disposed in the telescopic sleeve 21. The drive assembly comprises a worm wheel 25 and a worm 26, and the screw assembly comprises a screw 27 and a nut 28. The transmission shell 23 is connected with a driving motor 24, a worm 26 is connected and fixed with the output end of the driving motor 24, a worm wheel 25 is meshed and connected with the worm 26, a screw 27 is in key connection with the worm wheel 25, a nut 28 is in threaded connection with the screw 27, a telescopic rod piece 22 is connected and fixed with the nut 28, and the telescopic rod piece 22 is connected in the telescopic sleeve 21 in a sliding mode. Of course, the transmission housing 23 may be designed to be a combination of a rectangular cylinder and a cylindrical cylinder according to the arrangement positions of the worm wheel 25 and the worm 26, the worm wheel 25 is installed in the cylindrical cylinder, the worm 26 is installed in the rectangular cylinder, and the driving motor 24 is installed at the top of the rectangular cylinder.

When the driving motor 24 operates, the driving motor 24 drives the worm 26 to rotate, the worm 26 drives the worm wheel 25 to rotate, the worm wheel 25 drives the screw 27 to rotate through the key, the screw 27 drives the nut 28 to move through the thread, and then the telescopic rod 22 is driven to slide in the telescopic sleeve 21 through the nut 28, so that two ends of the telescopic assembly respectively push against the brake levers 30, and the brake levers 30 drive the main beam 11 to drive the four groups of brake shoes 40 to respectively get close to or get away from the wheels. Particularly, the output shaft of the driving motor 24 is designed to be in a structure form that two ends of the output shaft extend out, so that the driving motor 24 can be ensured to brake or relieve the wheels in a manual braking or manual relieving mode under the condition of power failure.

It can be understood that the transmission assembly can also be designed into a structural form of a reduction gearbox, the thread assembly can also be designed into a structural form that a screw rod is matched with a threaded pipe, the screw rod is connected with the reduction gearbox, and the threaded pipe can also be driven to stretch relative to the screw rod through the driving motor 24. The drive motor 24 may be a dc servo motor. In order to reduce the rotational resistance of the screw 27, a bearing may be further provided in the transmission housing 23 so that the screw 27 rotates within the transmission housing 23 through the bearing. Meanwhile, in order to enable the telescopic rod 22 to slide in the telescopic sleeve 21 in an oriented manner, structural members such as balls and guide rails may be provided in the telescopic sleeve 21. In addition, the unfolding helical angle of the worm 26 is smaller than the contact friction angle of the worm and the worm gear, and the self-locking function of the transmission assembly can be realized, so that the phenomenon that the train slides when the train is parked for a long time can be avoided.

As shown in fig. 5 and 6, a first hinge hole 31, a second hinge hole 32 and a third hinge hole 33 are formed in the brake lever 30 along the length direction of the brake lever 30. The first hinge hole 31 and the third hinge hole 33 are respectively disposed at both ends of the brake lever 30, and the second hinge hole 32 is disposed between the first hinge hole 31 and the third hinge hole 33. A first connector 201 is connected to the end of the transmission housing 23 along the axial direction of the telescopic sleeve 21 and the telescopic rod 22, and a second connector 202 is connected to the end of the telescopic rod 22 along the axial direction of the telescopic sleeve 21 and the telescopic rod 22. The upright column 13 is hinged with the brake levers 30 through a first hinge hole 31, the transmission housing 23 is hinged with a second hinge hole 32 on one group of the brake levers 30 through a first connector 201, the telescopic rod 22 is hinged with a second hinge hole 32 on the other group of the brake levers 30 through a second connector 202, and the brake chain 50 is hinged with the brake levers 30 through a third hinge hole 33.

As shown in fig. 5 and 6, in particular, the brake lever 30 further has an anti-slip hole 34 at one end thereof located on the pillar 13, such that the first hinge hole 31 is located between the second hinge hole 32 and the anti-slip hole 34, the anti-slip pin 301 is installed in the anti-slip hole 34, and a cotter 302 for preventing the anti-slip pin 301 from slipping off the anti-slip hole 34 is inserted into the anti-slip pin 301. The upright column 13 is designed into a double-layer clamping plate structure, and the brake lever 30 is arranged in the clamping plate structure in a penetrating mode and is hinged to the upright column 13. When the brake lever 30 is released from the upright 13, the clamping plate structure can be further retained in the upright 13 by the anti-release pin 301 and the cotter pin 302, thereby preventing the release of the brake lever 30. The brake lever 30 is made of high-strength alloy, the section of the brake lever 30 is in an I shape, the I-shaped section is located between the first hinge hole 31 and the second hinge hole 32 and between the second hinge hole 32 and the third hinge hole 33, the weight of the brake lever 30 can be reduced, and the light weight of the brake device is facilitated.

The invention drives the telescopic sleeve 21 and the telescopic rod 22 to extend and retract mechanically through the driving motor 24, the turbine 25, the worm 26, the screw 27 and the nut 28 to push two groups of brake beams to brake the brake shoe 40 or relieve the wheel, thereby avoiding the problems of piston stroke change, gas leakage, unstable output, weakened braking force and the like caused by fatigue and abrasion of a rear part after long-time application, improving the relieving performance of the braking device, having no pneumatic sealing requirement and having longer maintenance period of the braking device. The brake shoe slack adjuster provided by the rigidity and the clearance of the related components are not required to be designed independently, and the whole brake device is braked mechanically, so that the manufacturing requirements of the components of the brake device are reduced.

In addition, the invention also enables the worm wheel 25 and the worm 26 to be self-locked through the structural design of the worm wheel 25 and the worm 26, thereby integrating the automatic parking function on the braking device, not only canceling the structural design of a hand brake machine and simplifying the structure of a basic braking device, but also reducing the workload of train inspection, reducing the probability of misoperation and enabling the parking reliability of the vehicle to be higher. The manual braking or mitigation function can also be achieved through the output shaft extending out of the driving motor 24, so that the braking device of the invention can be applied to various working conditions. The design of the anti-release pin 301 and the split pin 302 on the brake lever 30 also prevents the brake lever 30 from being released from the upright 13.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Claims

1. A railway freight car truck brake rigging for mounting on a truck for braking a wheel, comprising:

the two groups of brake beams are symmetrically arranged on the two sides, close to the wheels, of the bogie, and brake shoes (40) for braking the wheels are connected to the two ends of the brake beams; and the number of the first and second groups,

the telescopic assembly comprises a telescopic sleeve (21) and a telescopic rod piece (22) which are in threaded transmission, wherein the telescopic sleeve (21) is connected with one group of brake beams, and the telescopic rod piece (22) is connected with the other group of brake beams;

the two groups of brake beams are driven to stretch through the threads of the telescopic sleeve (21) and the telescopic rod piece (22) so as to drive the brake shoes (40) to be close to or far away from the wheels.

2. A brake device for a railway wagon bogie according to claim 1, wherein the telescopic sleeve (21) is connected with a transmission housing (23), a transmission assembly is arranged in the transmission housing (23), a threaded assembly is arranged in the telescopic sleeve (21), the transmission assembly is connected with the threaded assembly, the threaded assembly is connected with the telescopic rod (22), the transmission housing (23) is connected with a driving motor (24) for driving the transmission assembly to move, and the telescopic rod (22) drives the threaded assembly to move in a telescopic way in the telescopic sleeve (21) through the transmission assembly.

3. A brake rigging for a railway wagon bogie according to claim 2, wherein the transmission assembly comprises a worm wheel (25) and a worm screw (26), the worm wheel (25) is engaged with the worm screw (26), the worm screw (26) is fixedly connected with an output end of the driving motor (24), and the worm wheel (25) is connected with the screw assembly.

4. A brake rigging for a railway wagon bogie according to claim 3, wherein the screw assembly comprises a screw (27) and a nut (28), the screw (27) is in threaded connection with the nut (28), the worm gear (25) is in keyed connection with the screw (27), the telescopic rod (22) is fixedly connected with the nut (28), the telescopic rod (22) is slidably connected in the telescopic sleeve (21), and the screw (27) drives the telescopic rod (22) to move through the nut (28).

5. A brake rigging for a railway wagon bogie according to claim 2, wherein a first connector (201) is connected to an end of the transmission housing (23) in an axial direction of the telescopic sleeve (21) and the telescopic rod (22), a second connector (202) is connected to an end of the telescopic rod (22) in the axial direction of the telescopic sleeve (21) and the telescopic rod (22), and two sets of the brake beams are connected to the telescopic assembly through the first connector (201) and the second connector (202), respectively.

6. A brake rigging for a railway wagon bogie according to any one of claims 1-5, wherein the brake beam comprises a primary beam (11) and a secondary beam (12), a column (13) is connected between the primary beam (11) and the secondary beam (12), the column (13) is hinged to a brake lever (30), the telescopic assembly is hinged to the brake lever (30), and the brake lever (30) is connected to a brake chain (50) for connection to the bogie.

7. A brake device for a railway wagon bogie as defined in claim 6, wherein the brake lever (30) is provided with a first hinge hole (31) for hinging the upright (13), a second hinge hole (32) for hinging the telescopic assembly and a third hinge hole (33) for hinging the brake chain (50), the first hinge hole (31) and the third hinge hole (33) are respectively disposed at two ends of the brake lever (30), and the second hinge hole (32) is disposed between the first hinge hole (31) and the third hinge hole (33).

8. A brake device for a railway wagon bogie as defined by claim 7, wherein an anti-drop hole (34) is further formed at one end of the brake lever (30) on the upright post (13), the first hinge hole (31) is located between the second hinge hole (32) and the anti-drop hole (34), an anti-drop pin (301) is installed in the anti-drop hole (34), and a split pin (302) for preventing the anti-drop pin (301) from dropping off the anti-drop hole (34) is arranged in the anti-drop pin (301) in a penetrating manner.

9. A brake rigging for a railway wagon bogie according to claim 6, wherein the brake lever (30) has an I-shaped cross-section (35) in cross-section, the I-shaped cross-section (35) being located between the first hinge bore (31) and the second hinge bore (32) and between the second hinge bore (32) and the third hinge bore (33).

10. A brake device for a railway wagon bogie as claimed in claim 6, wherein the two ends of the main beam (11) are respectively provided with a sliding block (41), the sliding blocks (41) are embedded on the bogie, and the brake shoes (40) are installed in the sliding blocks (41).

11. A bogie characterized by comprising a bolster and a railway freight car bogie brake rigging according to any one of claims 1 to 10, two sets of said brake beams being symmetrically disposed on either side of said bolster.