CN111907553A

CN111907553A - Electric tread brake of railway vehicle

Info

Publication number: CN111907553A
Application number: CN202010809527.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2020-11-10

Abstract

The invention relates to the field of railway vehicles, and particularly discloses an electric tread brake of a railway vehicle, which comprises a guide cylinder, a push rod, a linear driver and a brake block, wherein one end of the push rod is connected with an output shaft of the linear driver, the other end of the push rod coaxially penetrates through the guide cylinder and then is connected with the brake block, and the push rod is driven by the output shaft and linearly reciprocates along the axial direction of the output shaft. The push rod of the invention is directly driven by the linear driver, thereby reducing the structural complexity and the production cost of the whole device, and simultaneously, the push rod has larger moving range and can meet the actual use requirement.

Description

Electric tread brake of railway vehicle

Technical Field

The invention relates to the technical field of railway vehicles, in particular to an electric tread brake of a railway vehicle.

Background

With the increasing development of technology, the brake system of most rail vehicles at present uses a tread brake structure, and when braking, a brake shoe holds the tread of a wheel tightly, so that the wheel stops rotating through friction.

In the prior art, chinese patent CN2016214230520 discloses a rail vehicle electric tread brake, which comprises a brake block, an associated push head, a dust cover, a housing, a power seat, a driving part, a sensor, an adjusting rod, a limiting ring, a compensation motor, a compensation mechanism, a wiring box, an electric control cabin, a brake spring, and a push rod, wherein the power seat and the driving part are arranged in an open cavity of the housing, the front end of the adjusting rod is inserted into a step hole of the driving part until being inserted into a cavity of the power seat, the rear end of the adjusting rod is communicated with the sensor, the rear end of the push rod is inserted into a central hole of the adjusting rod, the front end of the adjusting rod can be freely moved and inserted into the central hole of the associated push head, the brake spring is sleeved on the push rod, and. The tread brake has the advantages that: the electric power source mode is adopted instead of a huge high-pressure air source for providing power, the attractive force generated by the power seat and the driving part after electricity is obtained is utilized to push the brake block to move, the wheel surface is compressed to generate friction force to meet the requirement of speed reduction and positioning, and the function of accurately compensating the working stroke of the push rod by monitoring the working stroke of the push rod is achieved automatically.

However, in practical use, the tread brake described above also has the following technical problems: because the power seat is an inductor, the driving part is a structural part made of ferromagnetic materials, a magnetic field is generated after the power supply is switched on, and attraction is generated between the power seat and the driving part, so that thrust is generated to push the push rod to move forwards; although the structure can meet the requirement of the compactness of the device, the transmission of magnetic force and the influence on other parts need to be considered in the electromagnetic force driving mode, so that the material characteristic requirements on the power seat, the structural part and the push rod are higher, the structural complexity and the production cost of the whole device are improved, and meanwhile, the moving range of the push rod is smaller, and the actual use requirement cannot be met.

In view of the above-mentioned shortcomings, there is a need for an improved tread brake that solves the problems set forth in the background above.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention discloses an electric tread brake of a railway vehicle, which aims to solve the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention provides an electric tread brake of a railway vehicle, which comprises a guide cylinder, a push rod, a linear driver and a brake block, wherein one end of the push rod is connected with an output shaft of the linear driver, the other end of the push rod coaxially penetrates through the guide cylinder and then is connected with the brake block, and the push rod is driven by the output shaft and linearly reciprocates along the axial direction of the output shaft.

Furthermore, the push rod is of a circular shaft structure and is fixedly connected with the output shaft through a coupler.

Further, the top fixedly connected with fixed block of push rod, the inside of guide cylinder is seted up the spout corresponding with the fixed block, fixed block sliding connection is in the spout.

Further, an oil feeding mechanism is arranged on the top wall of the sliding groove; the oil feeding mechanism comprises an oil storage cavity and an oil injection channel, the oil storage cavity is vertically downward arranged at the top of the guide cylinder, the bottom wall of the oil storage cavity is arranged on the oil injection channel, the bottom of the oil injection channel is communicated with the sliding groove, the bottom of the oil injection channel is provided with an arc-shaped opening, the inside of the oil injection channel is connected with a sliding block in a sliding mode, a plurality of groups of oil holes are formed in the upper surface of the sliding block, the bottom of the sliding block is fixedly connected with sealing balls, the bottom of each sealing ball is attached to the corresponding arc-shaped opening, the bottom of each sealing ball is located in the corresponding sliding groove, the bottom wall of the oil storage cavity is fixedly.

Furthermore, the top of the guide cylinder is fixedly connected with a threaded pipe orifice corresponding to the position of the oil storage cavity, and the top of the threaded pipe orifice is in threaded connection with a sealing cover.

Further, the fixed plate includes curb plate and roof, the shape of fixed plate is "U" type, the quantity of curb plate is two sets of and fixes on the diapire in oil storage chamber, the top at two sets of curb plates is fixed to the roof.

Furthermore, two groups of wedge-shaped inclined planes are arranged at the top of the fixing block, and the wedge-shaped inclined planes are symmetrically distributed on the left side and the right side of the fixing block.

Further, the bottom of the spring is fixedly connected with the top of the sliding block, the top of the spring is fixedly connected with the bottom wall of the top plate, and the spring is in a compressed state.

Further, a rubber pad is arranged in the sealing cover.

Further, the radial width of the oil filling channel is smaller than that of the oil storage cavity.

In summary, compared with the prior art, the invention has the following beneficial technical effects:

1. when the electric tread brake of the railway vehicle receives a braking instruction to implement braking action, a driving shaft of the linear driver extends outwards and drives a push rod to move by starting the linear driver, the push rod further drives a brake block to move towards the direction of a wheel, and the brake block compresses the wheel surface of the wheel to generate a braking effect; when a braking stop instruction is received, the driving shaft of the linear driver retracts and drives the push rod to reset; therefore, the push rod is directly driven by the linear driver, the overall structure complexity and the production cost of the device are reduced, and meanwhile, the moving range of the push rod is large, and the actual use requirement can be met.

2. According to the rail vehicle electric tread brake, the guide cylinder, the push rod, the fixing block, the sliding groove and the oil feeding mechanism are arranged, so that when the push rod pushes the brake block to brake after moving, the oil feeding mechanism can perform oil filling and lubrication on a gap between the push rod and the guide cylinder, further the sliding friction force between the push rod and the guide cylinder is reduced, the abrasion between the push rod and the guide cylinder is reduced, the service life of the push rod and the guide cylinder is ensured, the braking effect is ensured, the device does not need manual filling for many times, the lubricating time is long, time and labor are saved for workers, and the use requirements are met.

3. According to the electric tread brake for the railway vehicle, the sealing cover is arranged, so that the threaded pipe orifice can be conveniently sealed, the oil storage cavity can be further sealed, when lubricating oil is filled, the sealing cover is directly taken down, the lubricating oil is filled into the oil storage cavity through the threaded pipe orifice, the operation is simple and convenient, and the use requirements are met.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

FIG. 2 is a perspective view showing a connection structure of a guide cylinder and a push rod according to the present invention;

FIG. 3 is a sectional view showing a coupling structure of a guide cylinder and a push rod according to the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3 according to the present invention;

FIG. 5 is a sectional side view showing a connection structure of a guide cylinder and a push rod in the present invention;

FIG. 6 is an enlarged view of portion B of FIG. 5 according to the present invention.

In the figure: 1. a guide cylinder; 2. a push rod; 201. a fixed block; 2011. a wedge-shaped inclined plane; 3. a threaded pipe orifice; 301. a sealing cover; 4. an oil storage chamber; 401. a fixing plate; 4011. a side plate; 4012. a top plate; 5. a chute; 6. an oil injection channel; 601. an arc-shaped opening; 7. a spring; 8. a sealing ball; 9. a slider; 901. an oil hole; 10. a linear actuator; 101. an output shaft; 11. a brake pad; 12. a coupling is provided.

Detailed Description

The technical scheme of the invention is further explained by combining the drawings and the specific embodiments in the specification.

Examples

The embodiment provides an electric tread brake for a railway vehicle, which comprises a guide cylinder 1, a push rod 2, a linear driver 10 and a brake block 11, wherein one end of the push rod 2 is connected to an output shaft 101 of the linear driver 10, the other end of the push rod 2 coaxially penetrates through the guide cylinder 1 and then is connected with the brake block 11, and the push rod 2 is driven by the output shaft 101 and linearly reciprocates along the axial direction of the output shaft 101.

The guide cylinder 1 is preferably of a cylindrical structure, and the push rod 2 is partially arranged in the guide cylinder 1 so as to guide the movement of the push rod 2 and improve the stability; a central pore channel is coaxially arranged in the guide cylinder 1, and the push rod 2 is movably arranged in the central pore channel. The linear actuator 10 is a conventional linear actuator, and can convert the rotary motion of the motor therein into the linear reciprocating motion of the output shaft 101, for example, a DT500 type actuator can be selected. The push rod 2 is preferably of a circular shaft structure and is fixedly connected with the output shaft 101 through a coupling 12.

In this embodiment, the top (radial side) of the push rod 2 is fixedly connected with a fixed block 201, a sliding groove 5 corresponding to the fixed block 201 is formed in the guide cylinder 1, and the fixed block 201 is slidably connected in the sliding groove 5; the chute 5 is communicated with a central pore passage of the guide cylinder 1; the fixed block 201 can be arc-shaped, the length of the sliding chute 5 can account for 1/2-4/5 of the length of the guide cylinder 1, and the cross section shape of the sliding chute 5 is adapted to the cross section shape of the fixed block 201; the fixed block 201 enhances the guiding function of the guide cylinder 1 on the push rod 2, can reduce the abrasion of the push rod 2 and prolongs the service life.

In this embodiment, the top wall of the chute 5 is provided with an oil feeding mechanism; wherein, the oil feeding mechanism comprises an oil storage chamber 4 and an oil feeding channel 6, the oil storage chamber 4 is vertically and downwardly arranged at the top of the guide cylinder 1, the oil feeding channel 6 is arranged at the bottom wall of the oil storage chamber 4, the bottom of the oil feeding channel 6 is communicated with the sliding chute 5, the bottom of the oil feeding channel 6 is provided with an arc-shaped opening 601, the inside of the oil feeding channel 6 is slidably connected with a sliding block 9, the upper surface of the sliding block 9 is provided with a plurality of groups of oil holes 901, the bottom of the sliding block 9 is fixedly connected with a sealing ball 8, the bottom of the sealing ball 8 is attached to the arc-shaped opening 601, the bottommost part of the sealing ball is positioned in the sliding chute 5, the bottom wall of the oil storage chamber 4 is fixedly connected with a fixing plate 401, the top of the sliding block 9 and the bottom of the fixing plate 401 are provided with a spring 7, by arranging the guide cylinder 1, the push rod 2, the fixing block 201, and then reduce the sliding friction power between push rod 2 and the guide cylinder 1, reduce the wearing and tearing between push rod 2 and the guide cylinder 1, guarantee the life-span of push rod 2 and guide cylinder 1, guarantee the braking effect, this device need not artifical manual filling many times, and lubricated time is long moreover, for staff labour saving and time saving, satisfies the user demand.

In this embodiment, the top fixedly connected with of guide cylinder 1 and the corresponding threaded pipe mouth 3 in oil storage chamber 4 position, threaded pipe mouth 3's top threaded connection has sealed lid 301, be convenient for seal threaded pipe mouth 3 through setting up sealed lid 301, and then realize the sealed of oil storage chamber 4, when carrying out lubricating oil filling, directly take off sealed lid 301 through threaded pipe mouth 3 to add lubricating oil in the oil storage chamber 4 can, easy operation is convenient, satisfy the user demand.

In this embodiment, fixed plate 401 includes curb plate 4011 and roof 4012, and fixed plate 401's shape is "U" type, and curb plate 4011's quantity is two sets of and fixes on the diapire of oil storage chamber 4, and roof 4012 fixes the top at two sets of curb plates 4011, is convenient for fix spring 7 through setting up fixed plate 401.

In this embodiment, two sets of wedge inclined planes 2011 have been seted up at the top of fixed block 201, and wedge inclined plane 2011 symmetric distribution can be convenient for fixed block 201 upwards promote sealing ball 8 in the left and right sides of fixed block 201 through setting up wedge inclined plane 2011 for sealing ball 8 and arc opening 601 produce the clearance and make lubricating oil fall on push rod 2.

In this embodiment, the bottom of the spring 7 is fixedly connected to the top of the slider 9, the top of the spring 7 is fixedly connected to the bottom wall of the top plate 4012, and the spring 7 is in a compressed state.

In this embodiment, a rubber pad is arranged in the sealing cover 301, and the sealing performance of the sealing cover 301 can be improved by the rubber pad.

In this embodiment, the radial width of the oil filling passage 6 is smaller than the radial width of the oil reservoir chamber 4.

The working principle is as follows:

when the brake is used, the brake receives a braking instruction to implement braking action, by starting the linear driver 10, the driving shaft 101 of the linear driver 10 extends outwards and drives the push rod 2 to move, the push rod 2 further drives the brake block 11 to move towards the wheel direction, and the brake block 11 presses the wheel surface of the wheel to generate a braking effect; when a braking stop instruction is received, the driving shaft 101 of the linear driver 10 retracts and drives the push rod 2 to reset; therefore, the push rod 2 is directly driven by the linear driver 10, the structural complexity and the production cost of the whole device are reduced, and meanwhile, the moving range of the push rod 2 is large, so that the actual use requirement can be met; in the process, when the push rod 2 moves and then pushes the brake block 11 to brake, the push rod 2 can drive the fixed block 201 to slide in the sliding groove 5, and when the wedge-shaped inclined surface 2011 of the fixed block 201 abuts against the sealing ball 8, the sealing ball 8 can be pushed to move upwards (the contact time of the fixed block 201 and the sealing ball 8 can be determined according to needs, for example, the oil supply mechanism can be arranged outside the conventional sliding stroke of the push rod 2, the push rod 2 moves outside the conventional sliding stroke to realize the contact with the sealing ball 8 only when lubrication is needed, at the moment, the oil hole 901 of the slide block 9 can be designed to be a larger hole diameter to meet the requirement of fast oil supply, of course, the oil supply mechanism can also be arranged in the conventional sliding stroke of the push rod 2, at the moment, the movement of the push rod 2 drives the fixed block 201 to contact with the sealing ball 8 every time, the oil hole 901 of the slide block 9 can be designed to be a smaller hole, sealing ball 8 drives slider 9 and slides in oiling channel 6, slider 9 upward movement and compression spring 7, 8 during upward movement of sealing ball can break away from arc opening 601 and with the arc opening 601 between produce the gap, consequently lubricating oil in the oil storage chamber 4 can pass through oiling channel 6, through oilhole 901 downstream, then in the gap entering spout 5 that produces between sealing ball 8 and the arc opening 601, and carry out oiling lubrication in the gap to push rod 2 and guide cylinder 1, after fixed block 201 breaks away from the contact with sealing ball 8, spring 7 can stretch and promote slider 9 downstream, slider 9 drives between sealing ball 8 and the arc opening 601 sealed, and then stop the oil supply.

This stopper is through setting up guide cylinder 1, push rod 2, fixed block 201, spout 5 and oiling mechanism, realized when push rod 2 moves back promotion brake block and brakies, oiling lubrication can then be realized carrying out in the gap to push rod 2 and guide cylinder 1 to oiling mechanism, and then reduce the sliding friction power between push rod 2 and the guide cylinder 1, reduce the wearing and tearing between push rod 2 and the guide cylinder 1, guarantee the life-span of push rod 2 and guide cylinder 1, guarantee braking effect, this device need not artifical manual filling many times, and the lubrication time is long, for staff labour saving and time saving, and the use requirements are met.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A rail vehicle electric tread brake is characterized in that: the brake pad device is characterized by comprising a guide cylinder (1), a push rod (2), a linear driver (10) and a brake block (11), wherein one end of the push rod (2) is connected with an output shaft (101) of the linear driver (10), the other end of the push rod coaxially penetrates through the guide cylinder (1) and then is connected with the brake block (11), and the push rod (2) is driven by the output shaft (101) and linearly reciprocates along the axial direction of the output shaft (101).

2. The railway vehicle electric tread brake of claim 1, wherein: the push rod (2) is of a circular shaft structure and is fixedly connected with the output shaft (101) through a coupler (12).

3. The railway vehicle electric tread brake of claim 1, wherein: the top fixedly connected with fixed block (201) of push rod (2), spout (5) corresponding with fixed block (201) are seted up to the inside of guide cylinder (1), fixed block (201) sliding connection is in spout (5).

4. A railway vehicle electric tread brake as claimed in claim 3, wherein: the top wall of the sliding groove (5) is provided with an oil feeding mechanism; the oil feeding mechanism comprises an oil storage cavity (4) and an oil filling channel (6), the oil storage cavity (4) is vertically and downwards arranged at the top of the guide cylinder (1), the oil injection channel (6) is arranged on the bottom wall of the oil storage cavity (4), the bottom of the oil injection channel (6) is communicated with the sliding groove (5), the bottom of the oil injection channel (6) is provided with an arc-shaped opening (601), the inside of the oil injection channel (6) is connected with a sliding block (9) in a sliding way, a plurality of groups of oil holes (901) are arranged on the upper surface of the sliding block (9), a sealing ball (8) is fixedly connected with the bottom of the sliding block (9), the bottom of the sealing ball (8) is attached to the arc-shaped opening (601) and the bottommost part is positioned in the sliding groove (5), the diapire fixedly connected with fixed plate (401) of oil storage chamber (4), the top of slider (9) and the bottom of fixed plate (401) are equipped with spring (7).

5. The rail vehicle electric tread brake of claim 4, wherein: the top fixedly connected with of guide cylinder (1) and the corresponding screw thread mouth (3) in oil storage chamber (4) position, the top threaded connection of screw thread mouth (3) has sealed lid (301).

6. The rail vehicle electric tread brake of claim 4, wherein: fixed plate (401) include curb plate (4011) and roof (4012), the shape of fixed plate (401) is "U" type, the quantity of curb plate (4011) is two sets of and fixes on the diapire in oil storage chamber (4), the top at two sets of curb plates (4011) is fixed in roof (4012).

7. The railway vehicle electric tread brake of claim 6, wherein: two sets of wedge inclined planes (2011) are seted up at the top of fixed block (201), wedge inclined planes (2011) symmetric distribution is in the left and right sides of fixed block (201).

8. The railway vehicle electric tread brake of claim 7, wherein: the bottom of spring (7) is fixed continuous with the top of slider (9), the top of spring (7) is fixed continuous with the diapire of roof (4012), just spring (7) are in compression state.

9. The railway vehicle electric tread brake of claim 8, wherein: a rubber pad is arranged in the sealing cover (301).

10. The railway vehicle electric tread brake of claim 9, wherein: the radial width of the oil filling channel (6) is smaller than that of the oil storage cavity (4).