CN114738405A - Piston resetting mechanism and brake cylinder comprising same - Google Patents
Piston resetting mechanism and brake cylinder comprising same Download PDFInfo
- Publication number
- CN114738405A CN114738405A CN202210296685.3A CN202210296685A CN114738405A CN 114738405 A CN114738405 A CN 114738405A CN 202210296685 A CN202210296685 A CN 202210296685A CN 114738405 A CN114738405 A CN 114738405A
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- Prior art keywords
- spring
- piston
- wedge
- brake cylinder
- box body
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- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/06—Pistons
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The piston return mechanism of the present invention comprises: reset spring, the spring holder that is fixed in the checking cylinder, reset spring are conical spring, and conical spring's upper end supports the lower bottom surface of wedge piston, and conical spring's bottom is then supported by the spring holder. The spring seat is fixed to the box body of the brake cylinder through a bolt, the spring seat is provided with a bulge, and the bottom of the return spring is tightly hooped on the bulge. The conical spring is supported by a conical spring seat arranged on the box body, the resetting of the wedge-shaped piston in an exhaust state is realized by utilizing the compression elasticity of the spring, and the cylindrical protrusion characteristic is added on the spring seat for fixing the conical spring. The conical spring can achieve high compression ratio, can realize basic flattening, solves the contradiction between space limitation and the travel of the wedge-shaped piston in the braking process, ensures that the wedge-shaped piston is straight up and down, meets the requirement of effective resetting of the wedge-shaped piston, and has a more compact brake cylinder design.
Description
Technical Field
The invention relates to the technical field of parts for a rail transit basic braking system, in particular to a tread braking unit product.
Background
When the tread brake unit is released, the brake piston needs to be reset to the initial position. The brake piston, the brake cylinder and the brake cylinder cover form a sealed cavity, and the tread brake function is realized by inflating the sealed cavity. In the braking and relieving processes, the wedge-shaped piston moves vertically, the cross shaft and the thrust sleeve move horizontally and are limited by space, the braking piston resetting mechanism needs to realize high compression ratio, and a common cylindrical spring cannot meet the requirement.
In addition, the reset spring bottom of present brake cylinder piston all obtains the support through the cross (see chinese utility model patent CN2326493Y spring parking brake for rolling stock), and at the braking with alleviate the in-process, lateral shifting can take place for the cross, the reset spring bottom then removes thereupon, this makes the spring compression ratio can't set up higher, the design height of brake cylinder is also limited, can't do compacter, in addition, the constant removal of reset spring bottom also can reduce system's stability, lead to the piston difficulty that resets when serious.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a brake cylinder piston resetting mechanism to solve the problem of active resetting of a wedge-shaped piston in the brake relieving process.
In order to achieve the purpose of the invention, the technical scheme provided by the invention is as follows: piston canceling release mechanical system, including setting up wedge piston and the reset spring in the checking cylinder box, reset spring is conical spring, and reset spring's upper end supports the lower bottom surface of wedge piston, its characterized in that: a spring seat positioned above the cross shaft is fixed in the brake cylinder box body, and the bottom of the return spring is fixedly supported by the spring seat.
And a gap is kept between the cross shaft and the spring seat in the moving process, so that the cross shaft and the spring seat are ensured not to interfere.
Further, the return spring is a conical spring with a high compression ratio, the highest compression ratio is 8.5%, and the compression ratio = the height of the spring after compression/the height of the spring in a free state.
The return spring is nearly flat when compressed to its extreme state.
In addition, the present invention also claims a brake cylinder characterized in that: the piston resetting mechanism is provided. The brake cylinder comprises a box body, a wedge-shaped piston and a brake adjuster, wherein the wedge-shaped piston can vertically slide in the box body, the brake adjuster is located below the wedge-shaped piston, and the brake adjuster is provided with a thrust sleeve which is transversely arranged and a cross shaft which is sleeved on the thrust sleeve and driven by a wedge block of the wedge-shaped piston.
Furthermore, movable cylindrical rollers are arranged on two sides of the cross shaft, a static cylindrical roller located behind the cylindrical rollers is arranged on the box body, and wedge blocks of the wedge-shaped pistons are inserted into gaps between the movable cylindrical rollers and the static cylindrical rollers.
The conical spring is supported by a conical spring seat arranged on the box body, the resetting of the wedge-shaped piston in an exhaust state is realized by utilizing the compression elasticity of the spring, and the cylindrical protrusion characteristic is added on the spring seat and used for fixing the conical spring. The conical spring can achieve high compression ratio, can realize basic flattening, solves the contradiction between space limitation and the travel of the wedge-shaped piston in the braking process, ensures that the wedge-shaped piston is straight up and down, meets the requirement of effective resetting of the wedge-shaped piston, and has a more compact brake cylinder design.
Drawings
Fig. 1 is a sectional view of the interior of a brake cylinder provided with a piston return mechanism.
Fig. 2 is a schematic view of the interior of the brake cylinder.
The numbers in the figures are as follows:
1-a box body; 2-a wedge-shaped piston; 3-braking the cylinder cover; 4-Y type seal ring; 5-a return spring; 6-spring seat; 7-a cross shaft; 8-bolt; 9-a thrust sleeve; 10-a stationary cylindrical roller; 11-moving cylindrical rollers.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1 and 2, a brake cylinder provided with a piston return mechanism according to the present invention is provided. The brake cylinder comprises a box body 1, a wedge-shaped piston 2 which is arranged in the box body 1 and can vertically slide, and a brake adjuster which is positioned below the wedge-shaped piston 2 and is provided with a thrust sleeve 9 and a cross shaft 7 which is sleeved on the thrust sleeve 9 and driven by a wedge block of the wedge-shaped piston 2. The top of the box body 1 is provided with a braking cylinder cover 3, and the wedge-shaped piston 2 and the box body 1 are hermetically sealed through a Y-shaped sealing ring 4. Two sides of the cross shaft 7 are provided with movable cylindrical rollers 11, the box body 1 is provided with a static cylindrical roller 10 positioned behind the cylindrical rollers 11, and the wedge-shaped block of the wedge-shaped piston 2 is inserted into a gap between the movable cylindrical roller 11 and the static cylindrical roller 10.
Piston canceling release mechanical system is including setting up wedge piston 2, reset spring 5 in the brake cylinder box 1 and being located the spring holder 6 of cross 7 top, and reset spring 5 is conical spring, and the lower bottom surface of wedge piston 2 is supported in reset spring 5's upper end, and reset spring 5's bottom is supported by spring holder 6 fixedly.
Wherein the spring retainer 6 is fixed to the housing 1 of the brake cylinder by means of bolts 8. A gap is kept between the cross shaft 7 and the spring seat 6 in the moving process, and the interference between the cross shaft and the spring seat is avoided. As shown in FIG. 1, the middle part of the spring seat 6 is provided with an upward bulge, and the bottom of the return spring 5 is sleeved on the bulge, so that the bottom of the return spring 5 can be ensured to be fixed and does not move along with the cross shaft, the stable posture of the return spring 5 is ensured, and the conical spring with higher compression ratio can be designed. In this example, the return spring 5 is a conical spring having a high compression ratio, and the maximum compression ratio is 8.5%. In this example, the compression ratio of the return spring 5 is in the range of 8.5% to 56.5%, and the compression ratio = the height of the spring after compression/the height of the spring in the free state, the return spring 5 is almost flat when compressed to the limit state.
During braking, the brake cylinder cover 3 and the wedge-shaped piston 2 are inflated through the inflation hole in the brake cylinder cover 3, the wedge-shaped piston 2 overcomes the elastic force of the reset spring 5 to move downwards to compress the reset spring 5, and the movable cylindrical roller 11, the fixed cylindrical roller 10 and the cross shaft 7 are horizontally pushed out together through the cooperation between the wedge-shaped block in the wedge-shaped piston 2 and the movable cylindrical roller 11, so that braking is realized. When the brake is released, the brake cylinder exhausts, and the wedge-shaped piston 2 is subjected to upward elastic force of the return spring 5 to realize upward movement and return.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (10)
1. A piston return mechanism comprising: set up wedge piston (2) and reset spring (5) in brake cylinder box (1), reset spring (5) are conical spring, and the lower bottom surface that supports wedge piston (2), its characterized in that are supported to the upper end of reset spring (5): a spring seat (6) positioned above the cross shaft (7) is fixed in the brake cylinder box body (1), and the bottom of the return spring (5) is fixedly supported by the spring seat (6).
2. The piston return mechanism of claim 1, wherein: a gap is kept between the cross shaft (7) and the spring seat (6) in the moving process.
3. The piston return mechanism of claim 1, wherein: the middle part of the spring seat (6) is provided with an upward bulge, and the bottom of the return spring (5) is sleeved on the bulge.
4. The piston return mechanism of claim 1, wherein: the return spring (5) is a conical spring with a high compression ratio, the compression ratio ranges from 8.5% to 56.5%, and the compression ratio = the height of the spring after compression/the height of the spring in a free state.
5. The piston return mechanism of claim 1, wherein: the return spring (5) is flat or almost flat when compressed to the limit.
6. A brake cylinder, characterized by: having a piston return mechanism as claimed in any one of claims 1 to 4.
7. Brake cylinder according to claim 6, characterized in that: including box (1), set up in box (1) but vertical gliding wedge piston (2) and be located the brake adjuster of wedge piston (2) below, the brake adjuster has thrust sleeve (9) and the cover that transversely sets up and locates thrust sleeve (9) and by cross axle (7) of wedge block drive of wedge piston (2).
8. Brake cylinder according to claim 7, characterized in that: the wedge-shaped piston (2) and the box body (1) are hermetically sealed through a Y-shaped sealing ring (4).
9. The brake cylinder piston resetting mechanism according to claim 7, wherein: both sides of the cross shaft (7) are provided with movable cylindrical rollers (11), the box body (1) is provided with a static cylindrical roller (10) which is positioned behind the cylindrical rollers (11), and a wedge block of the wedge-shaped piston (2) is inserted into a gap between the movable cylindrical roller (11) and the static cylindrical roller (10).
10. The brake cylinder piston resetting mechanism according to claim 7, wherein: the top of the box body (1) is provided with a braking cylinder cover (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210296685.3A CN114738405A (en) | 2022-03-24 | 2022-03-24 | Piston resetting mechanism and brake cylinder comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210296685.3A CN114738405A (en) | 2022-03-24 | 2022-03-24 | Piston resetting mechanism and brake cylinder comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114738405A true CN114738405A (en) | 2022-07-12 |
Family
ID=82276847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210296685.3A Pending CN114738405A (en) | 2022-03-24 | 2022-03-24 | Piston resetting mechanism and brake cylinder comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114738405A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010042660A1 (en) * | 1999-09-23 | 2001-11-22 | Roland S. Moore | Collet style tread brake unit |
| CN2551528Y (en) * | 2002-06-21 | 2003-05-21 | 株洲电力机车厂 | Spring Energy storage parking brake for railway locomotive |
| CN101278139A (en) * | 2005-09-30 | 2008-10-01 | 法维莱交通车辆设备北欧股份公司 | A rail vehicle brake unit |
| CN101636306A (en) * | 2007-02-07 | 2010-01-27 | 法维莱运输诺迪克公司 | A rail vehicle brake slack adjuster |
| RU125146U1 (en) * | 2012-06-14 | 2013-02-27 | Открытое акционерное общество "Транспневматика" | BRAKE CYLINDER OF RAILWAY VEHICLE |
| CN203402204U (en) * | 2013-07-16 | 2014-01-22 | 南京浦镇海泰制动设备有限公司 | Brake shoe clearance adjuster for rail vehicle |
| CN104455116A (en) * | 2014-11-26 | 2015-03-25 | 南京浦镇海泰制动设备有限公司 | Cross shaft balance mechanism of brake |
| CN106763342A (en) * | 2016-12-26 | 2017-05-31 | 常州中车铁马科技实业有限公司 | Storing cycle cylinder |
| CN113757275A (en) * | 2020-06-02 | 2021-12-07 | 常州中车铁马科技实业有限公司 | Brake wedge piston and design method thereof, common brake cylinder, parking brake cylinder and three-point and four-point hanging clamp unit |
-
2022
- 2022-03-24 CN CN202210296685.3A patent/CN114738405A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010042660A1 (en) * | 1999-09-23 | 2001-11-22 | Roland S. Moore | Collet style tread brake unit |
| CN2551528Y (en) * | 2002-06-21 | 2003-05-21 | 株洲电力机车厂 | Spring Energy storage parking brake for railway locomotive |
| CN101278139A (en) * | 2005-09-30 | 2008-10-01 | 法维莱交通车辆设备北欧股份公司 | A rail vehicle brake unit |
| CN101636306A (en) * | 2007-02-07 | 2010-01-27 | 法维莱运输诺迪克公司 | A rail vehicle brake slack adjuster |
| RU125146U1 (en) * | 2012-06-14 | 2013-02-27 | Открытое акционерное общество "Транспневматика" | BRAKE CYLINDER OF RAILWAY VEHICLE |
| CN203402204U (en) * | 2013-07-16 | 2014-01-22 | 南京浦镇海泰制动设备有限公司 | Brake shoe clearance adjuster for rail vehicle |
| CN104455116A (en) * | 2014-11-26 | 2015-03-25 | 南京浦镇海泰制动设备有限公司 | Cross shaft balance mechanism of brake |
| CN106763342A (en) * | 2016-12-26 | 2017-05-31 | 常州中车铁马科技实业有限公司 | Storing cycle cylinder |
| CN113757275A (en) * | 2020-06-02 | 2021-12-07 | 常州中车铁马科技实业有限公司 | Brake wedge piston and design method thereof, common brake cylinder, parking brake cylinder and three-point and four-point hanging clamp unit |
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Application publication date: 20220712 |
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| WD01 | Invention patent application deemed withdrawn after publication |