CN110949443A

CN110949443A - Parking brake system for railway vehicle and relieving device thereof

Info

Publication number: CN110949443A
Application number: CN201911227841.5A
Authority: CN
Inventors: 吴世应; 毛莉; 王龙泉; 李金花; 康健
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-04-03

Abstract

The invention provides a parking brake system for a railway vehicle and a release device thereof, wherein the release device comprises a box body (1), two release pull ropes (8), a movable sleeve (6) positioned in an inner cavity of the box body, a return spring (7) sleeved on the movable sleeve and a lantern ring (3). The box body is provided with two first rope passing holes opposite to one opening of the movable sleeve, the opening plug (5) with two open grooves is installed at the other opening of the movable sleeve, the inner wall of the open groove and the inner wall of the movable sleeve jointly form a second rope passing hole, a pull rope end (801) releasing one end of a pull rope is clamped on the outer surface of the opening plug, and the other end of the pull rope sequentially penetrates through the second rope passing hole and the first rope passing holes. The box body is also provided with a long hole (101) opposite to the peripheral surface of the movable sleeve, and the lantern ring is provided with a protruding part which can be connected with the long hole in a sliding way. The relieving device provided by the invention has the advantages of simple structure and convenience in action, and has lower failure rate compared with the traditional relieving device.

Description

Parking brake system for railway vehicle and relieving device thereof

Technical Field

The invention relates to the field of rail vehicle parking braking, in particular to a parking braking system for a rail vehicle and a release device thereof.

Background

After the rail vehicle stops, a parking brake (similar to a hand brake of an automobile) needs to be applied to prevent the vehicle from slipping. The parking brake is generally realized by the acting force of an energy storage spring in the parking brake cylinder, the compression and the extension of the energy storage spring are mainly realized by compressed air, when the compressed air in the parking brake cylinder is discharged, the energy storage spring is extended due to the reduction of the stressed force, so that the application of the parking brake is realized, and when the compressed air is charged again, the energy storage spring is shortened due to the increase of the stressed force, so that the release of the parking brake is realized. If no compressed air is available to relieve the parking brake, it can also be manually relieved by operating the release pull cord.

For rail vehicles as long as hundreds of meters, dozens of parking brake cylinders are distributed on two sides of the vehicle in total, and in order to reduce labor intensity and shorten operation time, two release pull ropes are necessary to be equipped for each parking brake cylinder so as to manually release all the parking brake cylinders on any side of the vehicle. However, the existing relieving device with two relieving pull ropes is complex in structure, multiple in linkage parts and high in failure rate. Therefore, how to design a set of mitigation devices with simple structure and convenient actions to reduce the failure rate becomes a technical problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of the above, the present invention provides a parking brake system for a railway vehicle and a release device thereof, which has a simple structure, is convenient to operate, and has a lower failure rate compared to the conventional release device.

In order to achieve the purpose, the invention provides the following technical scheme:

a mitigation device for a rail vehicle for mitigating parking braking, comprising:

a cartridge body having an inner cavity;

the movable sleeve is positioned in the inner cavity of the box body and is connected with the box body in a sliding manner, the box body is provided with two first rope passing holes opposite to one tube opening of the movable sleeve, the other tube opening of the movable sleeve is provided with a tube opening plug with two open slots, the inner walls of the open slots and the inner wall of the movable sleeve form a second rope passing hole together, the box body is also provided with a long hole opposite to the peripheral surface of the movable sleeve, the length direction of the long hole is parallel to the axial direction of the movable sleeve, and the first rope passing hole and the long hole enable the inner cavity to be communicated with the outside of the box body;

one end of each release pull rope is provided with a pull rope end which is clamped on the outer surface of the opening plug, and the other end of each release pull rope sequentially penetrates through the second rope passing hole and the first rope passing hole; and

the cover is established reset spring and the lantern ring on the movable sleeve, the lantern ring have with rectangular hole sliding connection's protruding portion, movable sleeve's surface is provided with spacing arch, reset spring is located keeping away from of the lantern ring one side of bung hole stopper, and make the lantern ring with spacing arch offsets, reset spring keep away from the one end of the lantern ring with the step face of inner chamber offsets.

Optionally, in the above alleviating device, the alleviating device further includes a cushion ring sleeved on the movable sleeve, and the cushion ring is located between the collar and the return spring and slidably connected to the box body.

Optionally, in the above relieving device, an inner surface of the moving sleeve at an end close to the first rope passing hole is a tapered surface.

Optionally, in the above relieving device, a pull rope sheath installed at the first rope passing hole is further included.

Optionally, in the release device, the release device further includes a sheath clip fixedly connected to the box body, the sheath clip is provided with two openings, and a first slot corresponding to the opening is formed in the outer surface of the pull rope sheath.

Optionally, in the above relieving device, a first sealing ring is installed in the first rope passing hole and is in close contact with the outer surface of the pull rope sheath.

Optionally, in the relieving device, the box body is provided with an access hole opposite to the nozzle plug, the access hole enables the inner cavity to communicate with the outside of the box body, and the relieving device further includes a plug for plugging the access hole.

Optionally, in the relieving device, a plurality of protrusions are disposed on the outer circumferential surface of the plug at intervals, the box body is provided with a plurality of bosses distributed along the edge of the inlet hole, a passageway through which the protrusions pass is formed between two adjacent bosses, a second clamping groove communicated with the passageway is formed in one side of each boss close to the inlet hole, and the second clamping groove is used for accommodating the protrusion of the plug.

Optionally, in the relieving device, a second sealing ring is mounted on the plug and is in close contact with the inner wall of the inlet hole.

A parking brake system for a rail vehicle comprising a mitigation device as disclosed in any one of the preceding claims.

According to the technical scheme, the release device for the railway vehicle is characterized in that the movable sleeve is arranged in the inner cavity of the box body, the two release pull ropes penetrate through the movable sleeve, and the end heads of the pull ropes are clamped on the outer surface of the cylinder opening plug at one end of the movable sleeve, so that the movable sleeve can slide in the inner cavity by pulling any one of the release pull ropes. The movable sleeve is sleeved with a reset spring and a sleeve ring, the reset spring is located on one side, far away from the opening plug, of the sleeve ring, the sleeve ring is abutted to a limiting protrusion on the outer surface of the movable sleeve, when the pull rope is relieved by pulling, the sleeve ring moves along with the movable sleeve, and a protruding portion of the sleeve ring is located in a long hole of the box body and used for poking a pawl on a parking brake cylinder, so that the limitation on the ratchet wheel is relieved, and manual relieving is achieved. Therefore, the two relieving pull ropes share one set of transmission mechanism for driving the pawl, so that the relieving device provided by the invention is simple in structure and convenient and fast to act, and has a lower failure rate compared with the traditional relieving device.

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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic layout of a mitigation device a for a railway vehicle according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a mitigation device A provided by an embodiment of the invention;

FIG. 3 is a top view of a mitigation device A provided by an embodiment of the present invention;

fig. 4 and 5 are exploded views of a mitigation device a provided by an embodiment of the present invention;

figures 6 and 7 are schematic perspective views of the cartridge 1 of figure 5;

FIG. 8 is a cross-sectional view of the cartridge 1 of FIG. 5;

fig. 9 is a cross-sectional view of the traveling sleeve 6 of fig. 5;

FIG. 10 is a schematic perspective view of the bung 5 of FIG. 5;

figure 11 is a schematic perspective view of the collar 3 of figure 5;

FIG. 12 is a perspective view of plug 4 of FIG. 5;

FIG. 13 is a front view of plug 4 of FIG. 5;

fig. 14 is a schematic view of the assembly process of the plug 4 and the box body 1 in fig. 5.

Labeled as:

A. a mitigation device; B. a bolt; C. a ratchet wheel; D. parking the brake cylinder; E. a pawl; e1, pawl head; e2, pawl tail;

1. a box body; 101. a strip hole; 102. a first rope passing hole; 103. an access hole; 104. a boss;

2. a backing ring;

3. a collar; 301. a protrusion;

4. a plug; 401. a protrusion;

5. a bung; 501. an open slot;

6. moving the sleeve; 601. a first nozzle; 602. a second nozzle; 603. a limiting bulge;

7. a return spring;

8. a release pull rope; 801. a pull rope end;

9. a sheath clamp;

10. a pull rope sheath.

Detailed Description

For the purpose of facilitating understanding, the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, the release device a for the railway vehicle provided by the embodiment of the invention is fixedly installed on a parking brake cylinder D through a bolt B, a hinge point of a pawl E and the parking brake cylinder D is located in the middle of the pawl E, and a pawl head E1 is clamped on a ratchet wheel C. After applying parking brake, if manual release is needed, the release device A is operated to toggle the tail part E2 of the pawl, so that the pawl E rotates clockwise around the hinge point of the pawl E and the parking brake cylinder D, the head part E1 of the pawl is separated from the ratchet wheel C, and the ratchet wheel C can rotate freely, thereby completing the manual release of parking brake.

It should be noted that after the release mechanism a releases the force applied to the pawl tail E2, the pawl E can be rotated counterclockwise to return to its original position under the action of the torsion spring, so that the pawl head E1 can be re-engaged with the ratchet C in preparation for the next parking brake application.

Referring to fig. 2 to 5, fig. 2 is a sectional view of a mitigation device a according to an embodiment of the present invention, fig. 3 is a plan view of the mitigation device a, and fig. 4 and 5 are exploded views of the mitigation device a.

The relieving device A provided by the embodiment of the invention comprises a box body 1, two relieving pull ropes 8, a movable sleeve 6 positioned in an inner cavity of the box body 1, a return spring 7 sleeved on the movable sleeve 6 and a lantern ring 3.

The movable sleeve 6 is slidably connected with the box body 1, the box body 1 is provided with two first rope passing holes 102 (see fig. 6) opposite to one tube opening (i.e. a first tube opening 601 shown in fig. 9) of the movable sleeve 6, the other tube opening (i.e. a second tube opening 602 shown in fig. 9) of the movable sleeve 6 is provided with a tube opening plug 5 with two open slots 501 (see fig. 10), the inner wall of the open slot 501 and the inner wall of the movable sleeve 6 jointly form a second rope passing hole, the box body 1 is further provided with a long hole 101 (see fig. 6) opposite to the peripheral surface of the movable sleeve 6, the length direction of the long hole 101 is parallel to the axial direction of the movable sleeve 6, and the first rope passing holes 102 and the long hole 101 enable the inner cavity to be communicated with the outside of the box body 1.

One end of the release pull rope 8 is provided with a pull rope end 801 clamped on the outer surface of the bung 5, and the other end of the release pull rope sequentially passes through the second rope passing hole and the first rope passing hole 102 and is fixedly connected with the operating handle. It should be noted that the operation handles of the two release ropes 8 are respectively located on both sides of the railway vehicle, so that the release device a can be operated on either side of the vehicle.

The lantern ring 3 is provided with a protruding part 301 (see fig. 11) which is slidably connected with the elongated hole 101, the outer surface of the movable sleeve 6 is provided with a limiting bulge 603 (see fig. 9), the return spring 7 is positioned on one side of the lantern ring 3, which is far away from the opening plug 5, and enables the lantern ring 3 to be abutted against the limiting bulge 603, and one end of the return spring 7, which is far away from the lantern ring 3, is abutted against the step surface of the inner cavity.

Since the end 801 of the pulling rope is clamped on the outer surface of the opening plug 5 at one end of the movable sleeve 6, the movable sleeve 6 can slide in the inner cavity by pulling any one of the release pulling ropes 8. Reset spring 7 makes lantern ring 3 offset with spacing arch 603 on the movable sleeve 6 surface, so when the stay cord 8 is alleviated in the pulling, lantern ring 3 moves along with movable sleeve 6, and the protruding portion 301 of lantern ring 3 is arranged in rectangular hole 101 of box body 1 for stir pawl E on the parking brake cylinder D, thereby remove the restriction to ratchet C, realize manual alleviating. Therefore, the two relieving pull ropes 8 share one set of transmission mechanism for driving the pawl E, so that the relieving device provided by the invention is simple in structure and convenient and fast to act, and has a lower failure rate compared with the traditional relieving device.

As shown in fig. 2 and fig. 4, in order to reduce the friction force and reduce the wear on the collar 3, in this embodiment, the relieving device a further includes a backing ring 2 sleeved on the moving sleeve 6, and the backing ring 2 is located between the collar 3 and the return spring 7 and slidably connected to the box body 1. The backing ring 2 is preferably made of a wear-resistant material with a small friction coefficient, for example, a copper material may be used for the backing ring 2.

In order to reduce the wear of the release rope 8, in the present embodiment, the release device a further includes a rope sheath 10 installed at the first rope passing hole 102. During the rope hole 102 was crossed to the one end of stay cord sheath 10 was inserted first, in order to avoid the pulling to take out stay cord sheath 10 from first rope hole 102 of crossing when alleviating stay cord 8, this embodiment utilizes sheath checkpost 9 to block stay cord sheath 10 to the axial motion of restriction stay cord sheath 10, specifically, sheath checkpost 9 is provided with two openings, and the first draw-in groove that corresponds with the opening is seted up to the surface of stay cord sheath 10, and sheath checkpost 9 and 1 fixed connection of box body.

As shown in fig. 4, the box body 1 is provided with a threaded hole for installing the sheath clip 9 beside the first rope passing hole 102, during installation, the rope pulling sheath 10 is inserted into the first rope passing hole 102, the first clamping groove on the rope pulling sheath 10 is exposed at the position flush with the surface of the box body 1, then the sheath clip 9 is pushed to the rope pulling sheath 10 along the surface of the box body 1, so that the notch part of the sheath clip 9 is clamped into the first clamping groove of the rope pulling sheath 10, and finally, a bolt penetrates through the bolt hole of the sheath clip 9 and is screwed into the threaded hole beside the first rope passing hole 102, so that the sheath clip 9 is fixedly connected with the box body 1.

As shown in fig. 2, in order to better protect the components in the inner cavity of the box body 1, a first sealing ring closely contacting with the outer surface of the pull rope sheath 10 is installed in the first rope passing hole 102.

As shown in fig. 2 and 9, in order to facilitate guiding the release rope 8 to penetrate into the moving sleeve 6, in this embodiment, the inner surface of the moving sleeve 6 at the end (i.e., the first nozzle 601) close to the first rope passing hole 102 is a tapered surface.

In specific practical application, in order to enable the components to be installed in the inner cavity of the box body 1, the box body 1 can be designed to be a split structure, the position shown in fig. 2 is taken as an example, the box body 1 can be divided into an upper part and a lower part from the plane where the axis of the movable sleeve 6 is located, and after the components in the inner cavity of the box body 1 are installed, the two parts are buckled together to form the complete box body 1.

Referring to fig. 2 and 5, in order to more conveniently mount the components in the inner cavity of the box body 1, in the embodiment, the box body 1 is provided with an inlet hole 103 opposite to the bung 5, the inlet hole 103 communicates the inner cavity with the outside of the box body 1, and the relieving device a further comprises a plug 4 for plugging the inlet hole 103.

Referring to fig. 7, 12 and 13, a plurality of protrusions 401 are arranged on the outer circumferential surface of the plug 4 at intervals, the box body 1 is provided with a plurality of bosses 104 distributed along the edge of the inlet hole 103, a passage for the protrusion 401 to pass through is formed between two adjacent bosses 104, a second clamping groove communicated with the passage is formed in one side of each boss 104 close to the inlet hole 103, and the second clamping groove is used for accommodating the protrusion 401 of the plug 4.

As shown in fig. 14, in the assembly process of the plug 4 and the box body 1, the protrusion 401 of the plug 4 is staggered from the bosses 104 of the box body 1, so that the protrusion 401 is aligned with the passageway between two adjacent bosses 104, then the plug 4 is pushed onto the surface of the box body 1 along the passageway, and finally the plug 4 is rotated so that the protrusion 401 enters the second slot on the bosses 104.

To more securely connect the plug 4 to the box 1, the box 1 is generally provided with a threaded hole near the access hole 103, as shown in fig. 14, and when the plug 4 is rotated into position, the bolt hole of the plug 4 is aligned with the threaded hole, and the plug 4 and the box 1 can be further fixedly connected by using a bolt.

As shown in fig. 2, in order to better protect the components in the inner cavity of the box body 1, a second sealing ring is mounted on the plug 4 and is in close contact with the inner wall of the access hole 103.

The invention also provides a parking brake system for a rail vehicle, comprising the mitigation device disclosed in the above embodiment. Since the relieving device disclosed in the above embodiment has the above technical effects, the parking brake system having the relieving device also has the above technical effects, and the details are not repeated herein.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mitigation device for a railway vehicle for mitigating parking braking, comprising:

the box body (1), the box body (1) has inner cavity;

a movable sleeve (6) positioned in the inner cavity of the box body (1), wherein the movable sleeve (6) is connected with the box body (1) in a sliding way, the box body (1) is provided with two first rope passing holes (102) opposite to one opening of the movable sleeve (6), the other opening of the movable sleeve (6) is provided with a tube opening plug (5) with two open slots (501), the inner wall of the open slot (501) and the inner wall of the movable sleeve (6) jointly form a second rope passing hole, the box body (1) is also provided with a long hole (101) opposite to the peripheral surface of the movable sleeve (6), the length direction of the long hole (101) is parallel to the axial direction of the movable sleeve (6), the first rope passing hole (102) and the strip hole (101) enable the inner cavity to be communicated with the outside of the box body (1);

one end of each relieving pull rope (8) is provided with a pull rope end (801) clamped on the outer surface of the opening plug (5), and the other end of each relieving pull rope (8) sequentially penetrates through the second rope passing hole and the first rope passing hole (102); and

the cover is established reset spring (7) and lantern ring (3) on movable sleeve (6), lantern ring (3) have with rectangular hole (101) sliding connection's protruding portion (301), the surface of movable sleeve (6) is provided with spacing arch (603), reset spring (7) are located keeping away from of lantern ring (3) one side of bung hole stopper (5), and make lantern ring (3) with spacing arch (603) offset, keeping away from of reset spring (7) the one end of the lantern ring (3) with the step face of inner chamber offsets.

2. The mitigation device according to claim 1, further comprising a backing ring (2) sleeved on the movable sleeve (6), wherein the backing ring (2) is located between the collar (3) and the return spring (7) and slidably connected with the box body (1).

3. The mitigation device according to claim 1, wherein the inner surface of the moving sleeve (6) at the end close to the first rope passage hole (102) is conical.

4. The mitigation device of claim 1, further comprising a pull cord sheath (10) mounted at the first cord passing aperture (102).

5. The relieving device according to claim 4, further comprising a sheath clip (9) fixedly connected with the box body (1), wherein the sheath clip (9) is provided with two openings, and the outer surface of the pull rope sheath (10) is provided with a first clamping groove corresponding to the openings.

6. The mitigation device according to claim 4, wherein a first sealing ring is mounted in the first rope passage hole (102) in close contact with the outer surface of the pull rope sheath (10).

7. The relieving device according to any one of claims 1 to 6, characterized in that the box body (1) is provided with an inlet hole (103) opposite to the bung (5), the inlet hole (103) communicating the inner cavity with the outside of the box body (1), and the relieving device further comprises a plug (4) for plugging the inlet hole (103).

8. The relieving device according to claim 7, wherein a plurality of protrusions (401) are arranged on the outer circumferential surface of the plug (4) at intervals, the box body (1) is provided with a plurality of bosses (104) distributed along the edge of the inlet hole (103), a passageway for the protrusions (401) to pass through is formed between every two adjacent bosses (104), one side of each boss (104) close to the inlet hole (103) is provided with a second clamping groove communicated with the passageway, and the second clamping groove is used for accommodating the protrusions (401) of the plug (4).

9. A mitigation device according to claim 8, wherein said plug (4) is provided with a second sealing ring in close contact with the inner wall of said access hole (103).

10. Parking brake system for a rail vehicle, comprising a mitigation device, wherein the mitigation device is a mitigation device according to any one of claims 1 to 9.