AU2020289774A1 - Unit brake cylinder and integrated brake device - Google Patents

Unit brake cylinder and integrated brake device Download PDF

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Publication number
AU2020289774A1
AU2020289774A1 AU2020289774A AU2020289774A AU2020289774A1 AU 2020289774 A1 AU2020289774 A1 AU 2020289774A1 AU 2020289774 A AU2020289774 A AU 2020289774A AU 2020289774 A AU2020289774 A AU 2020289774A AU 2020289774 A1 AU2020289774 A1 AU 2020289774A1
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AU
Australia
Prior art keywords
piston
chamber
brake cylinder
clutch
brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
AU2020289774A
Other versions
AU2020289774B2 (en
Inventor
Kui DONG
Guo Li
Baohua Liu
Wenjun Liu
Yi Liu
Junwei Luo
Fuying Mao
Bo Ning
Jianhong Shen
Yanfei Shen
Kaien Wang
Bali XIAO
Chen XIAO
Weiyuan Xiao
Jianping Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meishan CRRC Brake Science and Technology Co Ltd
Original Assignee
Meishan CRRC Brake Science and Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meishan CRRC Brake Science and Technology Co Ltd filed Critical Meishan CRRC Brake Science and Technology Co Ltd
Publication of AU2020289774A1 publication Critical patent/AU2020289774A1/en
Application granted granted Critical
Publication of AU2020289774B2 publication Critical patent/AU2020289774B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/26—Compressed-air systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/08—Brake cylinders other than ultimate actuators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
    • B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H15/00—Wear-compensating mechanisms, e.g. slack adjusters
    • 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
    • F16D11/00—Clutches in which the members have interengaging parts
    • 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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • 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
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • 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
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Braking Arrangements (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

ON120017905AU Abstract Embodiments of the present disclosure provide a unit brake cylinder and an integrated brake device, relating to the technical field of rail traffic structures. The unit brake cylinder provided in an embodiment of the present disclosure includes a cylinder block, a piston, a clutch assembly and a brake-shoe slack adjuster. The piston is movably disposed within the cylinder block, and the piston is configured to divide an inner cavity of the cylinder block into a first chamber and a second chamber that are isolated from each other. The clutch assembly includes a positioning spring and a rear clutch, the piston is provided with a snap-fit groove, the rear clutch is provided with a clamping block, and the circumferential movement of the rear clutch relative to the piston is restricted through the engagement between the clamping block and the snap-fit groove. The positioning spring is located in the second chamber, and the positioning spring is configured to press the clamping block against the piston, so as to restrict the axial movement of the rear clutch relative to the piston, and further fix the rear clutch to the piston. ON120017905AU 19

Description

ON120017905AU
Unit Brake Cylinder and Integrated Brake Device
Technical Field The present disclosure relates to the technical field of rail traffic structures, and in particular to a unit brake cylinder and an integrated brake device. Background Art
In a rail vehicle, a unit brake cylinder is generally installed at the bottom of the vehicle, and a brake signal transmitted from a distribution valve is transferred to a basic brake device of a bogie, thereby finally driving a brake shoe to press the wheels, further achieving a braking effect. The inventors found in studies that the conventional unit brake cylinders at least have following disadvantages: deterioration of operation reliability of the unit brake cylinders during use and other situations. Summary The present disclosure provides a unit brake cylinder, which overcomes the shortcomings in the prior art, can improve the operation reliability of the unit brake cylinder and ensure the stability of the unit brake cylinder. The present disclosure further provides an integrated brake device, which can improve the operation reliability of the unit brake cylinder and ensure the stability of the unit brake cylinder.
Embodiments of the present disclosure can be implemented as follows: an embodiment of the present disclosure provides a unit brake cylinder, which includes: a cylinder block, a piston, a clutch assembly and a brake-shoe slack adjuster; the piston is movably disposed within the cylinder block, and the piston is configured to divide an inner cavity of the cylinder block into a first chamber and a second chamber that are isolated from each other, the cylinder block has a vent portion communicating with the first chamber, and the vent portion is configured to ventilate the first chamber; the clutch assembly includes a positioning spring and a rear clutch, the piston is provided with a snap-fit groove, the rear clutch is provided with a clamping block, and the clamping block is configured to be engaged with the snap-fit groove so as to restrict the circumferential movement of the rear clutch relative to the piston; the positioning spring is located in the second chamber, and two ends of the positioning spring are in contact with the brake-shoe slack adjuster and the clamping block, respectively, and the positioning spring is configured to press the clamping block against the piston, so as to restrict axial movement of the rear clutch relative to the piston. Optionally, the brake-shoe slack adjuster includes an adjusting nut, an adjusting spring, an adjusting spring seat, an adjusting screw and a connector, an end of the adjusting screw is connected to the connector, and the connector
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is detachably connected to the rear clutch; the adjusting nut is screwed with the adjusting screw; the adjusting spring sheathes the adjusting nut, and two ends of the adjusting spring abut against the adjusting nut and the adjusting spring seat, respectively, so as to press the adjusting spring seat against the clutch assembly; the adjusting screw is further provided with a limiting block, and the limiting block and the clutch assembly are provided at intervals, so as to form an adjustment gap between the limiting block and the clutch, and an end of the positioning spring away from the clamping block abuts against the limiting block. Optionally, the clutch assembly further includes a front clutch fixedly connected to the piston, the front clutch is located in the second chamber, and an accommodating cavity is formed between the front clutch and the rear clutch for the connector to move therein, and the connector is detachably connected to the front clutch and the rear clutch, respectively. Optionally, an end surface of the piston close to the second chamber is provided with a plurality of bumps protruding along an axial direction of the piston, the plurality of bumps are provided at intervals around the axial direction, and the snap-fit groove is formed between each two adjacent bumps; and the clamping block is clamped in the snap-fit groove, and the clamping block abuts against an end surface of the piston. Optionally, each of the bumps includes a first protrusion and a second protrusion, the first protrusion is fixedly connected to the piston, the second protrusion is fixedly connected to an end of the first protrusion away from the piston; the first protrusion has a first end surface away from the piston, the clamping block has a second end surface away from the piston, and the first end surface and the second end surface form an abutment surface for the positioning spring to abut against. Optionally, the unit brake cylinder further includes a front end housing, the front end housing is fixedly connected to the cylinder block, so as to close an inner cavity of the cylinder block; and the front end housing sheathes the brake shoe slack adjuster. Optionally, the unit brake cylinder further includes a transmission rod, a manual brake lever and a connecting seat fixedly connected to the front end housing; the manual brake lever is rotatably connected to the connecting seat, one end of the transmission rod is fixedly connected to the piston, and the other end of the transmission rod extends out of the cylinder block, and is in transmission connection with the manual brake lever, so as to drive the piston to move through the manual brake lever. Optionally, the front end housing is provided with a plurality of indicating color rings, and the plurality of indicating color rings are arranged at intervals along an axial direction of the front end housing; an end of the transmission rod extending out of the cylinder block is provided with an alignment ring, and a stroke position of the piston is determined by a corresponding relationship between the alignment ring and the indicating color rings.
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Optionally, the manual brake lever includes a first connecting arm and a second connecting arm, the first connecting arm is rotatably connected to the connecting seat via a first pin shaft, and the second connecting arm is rotatably connected to the connecting seat via a second pin shaft. Optionally, the first pin shaft is screwed to the first connecting arm, the second pin shaft is screwed to the second connecting arm, and a rotation direction of threads of the first pin shaft is different from a rotation direction of threads of the second pin shaft. Optionally, the unit brake cylinder further includes a first elastic retaining ring and a second elastic retaining ring, the first elastic retaining ring is disposed on a side of the first pin shaft away from the connecting seat, so as to prevent the first pin shaft from being disengaged from the connecting seat; and the second elastic retaining ring is disposed on a side of the second pin shaft away from the connecting seat, so as to prevent the second pin shaft from being disengaged from the connecting seat. Optionally, the front end housing is provided with a vent hole communicating with the second chamber, and the vent hole is configured for air to go into and out of the second chamber. Optionally, the unit brake cylinder further includes a respirator fixedly connected to the front end housing, the respirator is provided with a gas passage, and the gas passage communicates with the vent hole. Optionally, the gas passage includes a first passage and a second passage in communication with each other, the first passage communicates with the vent hole, and the first passage extends along a direction pointing from the second chamber towards the first chamber, an extending direction of the second passage is inclined relative to the first passage, and along the direction pointing from the second chamber towards the first chamber, a distance between the first passage and the second passage decreases. An embodiment of the present disclosure further provides an integrated brake device, which includes the unit brake cylinder mentioned in the above. Optionally, the integrated brake device further includes a main brake beam, an auxiliary brake beam, a push rod and a rotation lever, the number of the rotation lever is two, two ends of the unit brake cylinder are movably connected to the main brake beam through the two rotation levers, respectively, and two ends of the push rod are connected to the rotation lever and the auxiliary brake beam, respectively. Optionally, the push rod is telescopic. Optionally, the push rod includes a first screw, a second screw and an adjustment nut, the adjustment nut is screwed to both the first screw and the second screw, so as adjust a distance between the first screw and the second screw through the adjustment nut
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Compared with the prior art, beneficial effects of the embodiments of the present disclosure include, for example: the embodiments of the present disclosure provide a unit brake cylinder and an integrated brake device. The unit brake cylinder includes a cylinder block, a piston, a clutch assembly and a brake-shoe slack adjuster. The piston is movably disposed within the cylinder block, and the piston is configured to divide an inner cavity of the cylinder block into a first chamber and a second chamber that are isolated from each other. The cylinder block has a vent portion communicating with the first chamber, so that the first chamber is ventilated through the vent portion, so as to push the piston to move in a direction of compressing the second chamber. The clutch assembly includes a positioning spring and a rear clutch, the piston is provided with a snap-fit groove, the rear clutch is provided with a clamping block, and the circumferential movement of the rear clutch relative to the piston is restricted through the engagement between the clamping block and the snap-fit groove. The positioning spring is located in the second chamber, and two ends of the positioning spring are in contact with the brake-shoe slack adjuster and the clamping block, respectively. The positioning spring is configured to press the clamping block against the piston, so as to restrict the axial movement of the rear clutch relative to the piston, and further fix the rear clutch to the piston. The limit of the rear clutch is realized through the cooperation between the clamping block and the snap-fit groove, and the axial limit of the rear clutch and the piston is ensured by the pressing effect of the positioning spring. Compared with the existing bolt connection mode, not only the structure is simplified to make the installation more convenient and quick, meanwhile, the influence of bolt loosening on operation reliability of the unit brake cylinder during use is avoided, further the operation reliability of the unit brake cylinder is ensured. Brief Description of Drawings
In order to more clearly illustrate technical solutions of embodiments of the present disclosure, accompanying drawings which need to be used in the embodiments will be introduced below briefly, and it should be understood that the accompanying drawings below merely show some embodiments of the present disclosure, and therefore should not be considered as limitation to the scope, and a person ordinarily skilled in the art still could obtain other relevant accompanying drawings according to these accompanying drawings, without using any creative effort. FIG. 1 is a schematic view of an overall structure of an integrated brake device provided in an embodiment of the present disclosure; FIG. 2 is a structural view of an overall structure of a unit brake cylinder provided in an embodiment of the present disclosure; FIG. 3 is a schematic view of a sectional structure of the unit brake cylinder provided in an embodiment of the present disclosure; FIG. 4 is a structural schematic view of a cylinder block in the unit brake cylinder provided in an embodiment of the present disclosure; ON120017905AU 4
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FIG. 5 is a schematic view of a cooperation structure of a piston and a rear clutch in the unit brake cylinder provided in an embodiment of the present disclosure; FIG. 6 is an enlarged schematic view of a partial structure at VI in FIG. 3;
FIG. 7 is an enlarged view of a partial structure at VII in FIG. 3; FIG. 8 is a structural schematic view of a manual brake lever and a connecting seat in the unit brake cylinder provided in an embodiment of the present disclosure;
FIG. 9 is an enlarged schematic view of a partial structure at IX in FIG. 3; FIG. 10 is a structural schematic view of a respirator in the unit brake cylinder provided in an embodiment of the present disclosure; and FIG. 11 is a structural schematic view of a push rod in an integrated brake device provided in an embodiment of the present disclosure. Reference signs: 10-integrated brake device; 100-unit brake cylinder; 110 cylinder block; 111-vent portion; 112-first chamber; 113-second chamber; 120 piston; 121-bump; 122-first protrusion; 123-second protrusion; 124-snap-fit groove; 130-clutch assembly; 131-rear clutch; 132-clamping block; 133-front clutch; 134-positioning spring; 140-brake-shoe slack adjuster; 141-adjusting nut; 142-adjusting screw; 143-connector; 144-adjusting spring; 145-adjusting spring seat; 1451-seat body; 1452-support plate; 146-limiting block; 147 adjustment gap; 148-abutment protrusion; 150-front end housing; 151-first housing portion; 152-second housing portion; 153-limiting step; 154-indicating color ring; 155-vent hole; 161-protective shell; 162-limiting sleeve; 163-limiting spring; 171-manual brake lever; 172-first connecting arm; 173-second connecting arm; 174-first pin shaft; 175-second pin shaft; 176-first elastic retaining ring; 177-second elastic retaining ring; 178-connecting seat; 179 transmission rod; 1791-alignment ring; 181-connecting rod; 182-reset spring; 190-respirator; 191-gas passage; 192-first passage; 193-second passage; 210 main brake beam; 220-auxiliary brake beam; 230-push rod; 231-first push rod; 232-second push rod; 233-first screw; 234-second screw; 235-adjustment nut; 240-rotation lever; 241-first rotation lever; 242-second rotation lever. Detailed Description of Embodiments
In order to make objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present disclosure, and apparently, some but not all embodiments of the present disclosure are described. Generally, components in the embodiments of the present disclosure described and shown in the accompanying drawings herein may be arranged and designed in different configurations.
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Therefore, the detailed description below of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of protection of the present disclosure, but merely represents chosen embodiments of the present disclosure. Based on the embodiments in the present disclosure, all of other embodiments obtained by those ordinarily skilled in the art without using any creative effort shall fall within the scope of protection of the present disclosure. It should be noted that similar reference signs and letters represent similar items in the following accompanying drawings, therefore, once a certain item is defined in one accompanying drawing, it is not needed to be further defined or explained in subsequent accompanying drawings. In the description of the present disclosure, it should be indicated that orientation or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on orientation or positional relationships as shown in the drawings, or orientation or positional relationships of a product of the present disclosure when being conventionally placed in use, merely for facilitating describing the present disclosure and simplifying the description, rather than indicating or suggesting that related devices or elements have to be in the specific orientation or configured and operated in a specific orientation, therefore, they should not be construed as limitation to the present disclosure. Besides, terms such as "first", "second", and "third", if appear, are merely for distinctive description, but should not be construed as indicating or implying importance in the relativity. Moreover, terms such as "horizontal", "vertical", and "pendulous", if appear, do not mean that a component is required to be absolutely horizontal or pendulous, but mean that the component can be slightly inclined. For example, by "horizontal" it merely means that a structure is more horizontal in comparison with "vertical", rather than being completely horizontal, while the structure may be slightly inclined. In the description of the present disclosure, it also should be noted that unless otherwise specified and defined clearly, terms "provide", "mount", "join", "connect" and so on, if appear, should be understood in a broad sense, for example, a connection may be a fixed connection, a detachable connection, or an integrated connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it also may be an inner communication between two elements. For a person ordinarily skilled in the art, specific meanings of the above-mentioned terms in the present disclosure could be understood according to specific circumstances. It should be noted that the features in the embodiments of the present disclosure may be combined with each other if there is no conflict. FIG. 1 is a schematic view of an overall structure of an integrated brake device 10 provided in an embodiment of the present disclosure, FIG. 2 is a ON120017905AU 6
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structural view of an overall structure of a unit brake cylinder 100 provided in an embodiment of the present disclosure, FIG. 3 is a schematic view of a sectional structure of the unit brake cylinder 100 provided in an embodiment of the present disclosure, and FIG. 4 is a structural schematic view of a cylinder block 110 in the unit brake cylinder 100 provided in an embodiment of the present disclosure. Referring to FIG. 1 to FIG. 4 in combination, an embodiment of the present disclosure provides a unit brake cylinder 100 and an integrated brake device 10. The integrated brake device 10 includes a unit brake cylinder 100, and meanwhile, the integrated brake device 10 further includes a main brake beam 210, an auxiliary brake beam 220, a push rod 230 and a rotation lever 240. Specifically, the number of push rod 230 and rotation lever 240 each is two, the two push rods 230 are a first push rod 231 and a second push rod 232, respectively, and the two rotation levers 240 are a first rotation lever 241 and a second rotation lever 242, respectively. The first rotation lever 241 is simultaneously rotationally connected to the main brake beam 210, the first push rod 231 and the unit brake cylinder 100, and an end of the first push rod 231 away from the first rotation lever 241 is rotationally connected to the auxiliary brake beam 220. The second rotation lever 242 is simultaneously rotationally connected to the main brake beam 210, the second push rod 232 and the unit brake cylinder 100, and an end of the second push rod 232 away from the second rotation lever 242 is rotationally connected to the auxiliary brake beam 220. Thus, the unit brake cylinder 100 is movably connected to the main brake beam 210 by the first rotation lever 241 and the second rotation lever 242.
The unit brake cylinder 100 includes a cylinder block 110, a piston 120, a clutch assembly 130, and a brake-shoe slack adjuster 140. The piston 120 is movably disposed within the cylinder block 110, and the piston 120 is configured to divide an inner cavity of the cylinder block 110 into a first chamber 112 and a second chamber 113 that are isolated from each other. The cylinder block 110 has a vent portion 111 communicating with the first chamber 112, so that the first chamber 112 is ventilated through the vent portion 111, so as to push the piston 120 to move in a direction of compressing the second chamber 113. The clutch assembly 130 includes a positioning spring 134 and a rear clutch 131, the piston 120 is provided with a snap-fit groove 124, the rear clutch 131 is provided with a clamping block 132, and the circumferential movement of the rear clutch 131 relative to the piston 120 is restricted through the engagement between the clamping block 132 and the snap-fit groove 124. The positioning spring 134 is located in the second chamber 113, and two ends of the positioning spring 134 are in contact with the brake-shoe slack adjuster 140 and the clamping block 132, respectively. The positioning spring 134 is configured to press the clamping block 132 against the piston 120, so as to restrict the axial movement of the rear clutch 131 relative to the piston 120, and further fix the rear clutch 131 to the piston 120. The limit of the rear clutch 131 is realized through the cooperation between the clamping block 132 and the snap-fit groove 124, and the axial limit of the rear clutch 131 and the piston 120 is ensured by the pressing effect of the positioning spring 134. Compared with
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the existing bolt connection mode, not only the structure is simplified to make the installation more convenient and quick, meanwhile, the influence of bolt loosening on operation reliability of the unit brake cylinder 100 during use is avoided, further the operation reliability of the unit brake cylinder 100 is ensured. Optionally, the vent portion 111 is a through hole provided on an end surface of the cylinder block 110. The unit brake cylinder 100 provided in the present embodiment is further described below:
FIG. 5 is a schematic view of a cooperation structure of the piston 120 and the rear clutch 131 in the unit brake cylinder 100 provided in an embodiment of the present disclosure. Referring to FIG. 3 and FIG. 5 in combination, in the present embodiment, a plurality of bumps 121 protruding along the axial direction of the piston 120 are provided on an end surface of the piston 120 close to the second chamber 113, and the plurality of bumps 121 are provided at intervals around the axial direction of the piston 120, so as form the snap-fit groove 124 between each two adjacent bumps 121. Specifically, the bumps 121 are in a sector ring shape, so that the plurality of bumps 121 provided at intervals around the axial direction of the piston 120 form a space for mounting the rear clutch 131, the rear clutch 131 is arranged in the space, and the clamping block 132 on the rear clutch 131 protrudes outward along the radial direction of the rear clutch 131, so as to be engaged with the snap-fit groove 124, thus realizing the circumferential limit to the rear clutch 131. Optionally, the end surface of the piston 120 close to the second chamber 113 is recessed inward along the axial direction to form a recess, and the bumps 121 are disposed in the recess.
Optionally, each bump 121 includes a first protrusion 122 and a second protrusion 123, wherein the first protrusion 122 is fixedly connected to the piston 120, the second protrusion 123 is fixedly connected to an end of the first protrusion 122 away from the piston 120, and an end surface of an end of the first protrusion 122 close to the second protrusion 123 is a first end surface. As the radial dimension of the first protrusion 122 is larger than the radial dimension of the second protrusion 123, the first end surface is located radially outside the second protrusion 123. An end surface of an end of the clamping block 132 away from the piston 120 is a second end surface, and when the clamping block 132 is snap-fitted to the snap-fit groove 124, and the clamping block 132 is pressed against the piston 120 under the effect of the positioning spring 134, the first end surface is flush with the second end surface, thereby forming an abutment surface for the positioning spring 134 to abut against. Optionally, the clutch assembly 130 further includes a front clutch 133, wherein the front clutch 133 is fixedly connected to the piston 120, and the front clutch 133 is located in the second chamber 113. The front clutch 133 and the rear clutch 131 are arranged at intervals so as to form an accommodating cavity between the front clutch 133 and the rear clutch 131. Specifically, the front clutch 133 is fixedly connected to an end of the second protrusion 123 away from the first protrusion 122 by bolts. As the bumps 121 configured to fix the
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front clutch 133 are provided in a sector ring shape, and the adjacent bumps 121 are arranged at intervals, it thereby helps to reduce the weight of the piston 120. Optionally, the unit brake cylinder 100 further includes a reset spring 182 disposed within the second chamber 113, and the reset spring 182 abuts on the piston 120, so as to push the piston 120 to move in a direction of compressing the first chamber 112 when the gas pressure in the first chamber 112 is decreased.
FIG. 6 is an enlarged schematic view of a partial structure at VI in FIG. 3. Referring to FIG. 3 and FIG. 6 in combination, in the present embodiment, the brake-shoe slack adjuster 140 includes an adjusting nut 141, an adjusting spring 144, an adjusting spring seat 145, an adjusting screw 142 and a connector 143. The adjusting nut 141 has opposite first end and second end, wherein the first end is located within the second chamber 113, and the second end extends to the outside of the cylinder block 110. The connector 143 is fixedly connected to an end of the adjusting screw 142, and the connector 143 extends into the accommodating cavity, so as to be detachably connected to the front clutch 133 and the rear clutch 131. Specifically, the front clutch 133 and the rear clutch 131 are respectively provided with a tapered ring gear, two ends of the connector 143 are respectively provided with tapered gears. When the connector 143 moves into engagement with the tapered ring gear of the rear clutch 131, the connector 143 is connected to the rear clutch 131. When the connector 143 moves into engagement with the tapered ring gear of the front clutch 133, the connector 143 is connected to the front clutch 133, meanwhile, when the connector 143 moves to an intermediate position relative to the clutch assembly 130, the connector 143 is disengaged from both the front clutch 133 and the rear clutch 131. The other end of the adjusting screw 142 extends along the axial direction of the piston 120 towards the direction away from the piston 120, and is screwed with a first end of the adjusting nut 141. The adjusting spring seat 145 sheathes the adjusting screw 142, and the adjusting spring seat 145 is located on a side of the adjusting nut 141 close to the piston 120, the adjusting spring 144 sheathes the adjusting nut 141, a second end of the adjusting nut 141 is provided with an abutment protrusion 148, and two ends of the adjusting spring 144 abut against the adjusting spring seat 145 and the abutment protrusion 148, respectively. Meanwhile, the adjusting spring seat 145 presses against the front clutch 133 under the effect of the adjusting spring 144, so that when the piston 120 moves relative to the cylinder block 110 in the direction of compressing the second chamber 113, the adjusting spring seat 145 and the adjusting nut 141 are pushed by the front clutch 133 to moved simultaneously towards the direction away from the piston 120. The adjusting screw 142 is further provided with a limiting block 146, and the limiting block 146 and the clutch assembly 130 are provided at intervals, so as to form an adjustment gap 147 between the limiting block 146 and the clutch
ON120017905AU 9
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assembly 130. An end of the positioning spring 134 away from the clamping block 132 abuts against the limiting block 146. Specifically, the limiting block 146 and the front clutch 133 are provided at intervals, so as to form the adjustment gap 147 between the limiting block 146 and the front clutch 133. The adjusting spring seat 145 includes a seat body 1451 and a support plate 1452 fixedly connected to the seat body 1451, the limiting block 146 is arranged between the seat body 1451 and the front clutch 133, and the support plate 1452 extends to the front clutch 133 through a through hole or slot on the limiting block 146 and abuts against the front clutch 133. Optionally, the limiting block 146 is connected to the adjusting screw 142 through a bearing. Specifically, the adjusting screw 142 is provided with a first retaining ring, and the first retaining ring abuts against an inner ring of the bearing, so as to be configured to limit an axial position of the bearing relative to the adjusting screw 142. The limiting block 146 is provided with a second retaining ring, and the second retaining ring abuts against an outer ring of the bearing, so as to be configured to limit an axial position of the bearing relative to the limiting block 146. In other words, the limiting block 146 may rotate relative to the adjusting screw 142, and meanwhile, the axial movement of the limiting block 146 relative to the adjusting screw 142 is restricted. FIG. 7 is an enlarged view of a partial structure at VII in FIG. 3. Referring to FIG. 3, FIG. 6 and FIG. 7 in combination, in the present embodiment, the unit brake cylinder 100 further includes a front end housing 150, wherein the front end housing 150 is fixedly connected to the cylinder block 110, so as to close an inner cavity of the cylinder block 110, and the front end housing 150 sheathes the brake-shoe slack adjuster 140. Optionally, a sealing ring is provided between an inner circumferential wall of the cylinder block 110 and an outer circumferential wall of the front end housing 150, so as to ensure sealing of the second chamber 113.
Optionally, the front end housing 150 includes a first housing portion 151 and a second housing portion 152 connected to each other. The first housing portion 151 is fixedly connected to the cylinder block 110, so as to form a cylindrical inner cavity in the cylinder block 110, meanwhile the inner cavity is divided into a cylindrical first chamber 112 and a cylindrical second chamber 113 by the piston 120, wherein the first chamber 112 is located on a side of the piston 120 away from the first housing portion 151, and the second chamber 113 is located on a side of the piston 120 close to the first housing portion 151. The second housing portion 152 is fixedly connected to an end of the first housing portion 151 away from the cylinder block 110, and an end of the second housing portion 152 away from the first housing portion 151 is in sliding fit with the adjusting nut 141. Optionally, the unit brake cylinder 100 further includes a protective shell 161 sheathing the adjusting spring 144, one end of the protective shell 161 extends to the second chamber 113, and the other end of the protective shell 161 is connected to an abutment protrusion 148, and meanwhile, a portion of the protective shell 161 correspondingly located in the second housing portion 152 is in sliding fit with the second housing portion 152. Specifically, the protective ON120017905AU 10
ON120017905AU
shell 161 is screwed with the abutment protrusion 148, and the abutment protrusion 148 is screwed with the adjusting nut 141. Optionally, the unit brake cylinder 100 further includes a limiting sleeve 162 fixedly connected to the front end housing 150, the limiting sleeve 162 sheathes the protective shell 161, meanwhile, an end of the limiting sleeve 162 extends into the first chamber 112 so as to be configured to limit the axial position of the limiting block 146 when the limiting sleeve 162 abuts against the limiting block 146. Specifically, the limiting sleeve 162 is connected to the first housing portion 151. Optionally, the unit brake cylinder 100 further includes a limiting spring 163. The first housing portion 151 is provided with a limiting step 153, and two ends of the limiting spring 163 abut against the limiting step 153 and the limiting sleeve 162, respectively. FIG. 8 is a structural schematic view of a manual brake lever 171 and a connecting seat 178 in the unit brake cylinder 100 provided in an embodiment of the present disclosure. Referring to FIG. 2 and FIG. 8 in combination, in the present embodiment, the unit brake cylinder 100 further includes a transmission rod 179, a manual brake lever 171 and a connecting seat 178 fixedly connected to the front end housing 150. One end of the transmission rod 179 extends into the second chamber 113 through the front end housing 150 and is fixedly connected to the piston 120, and the other end of the transmission rod 179 extends out of the cylinder block 110, and is in transmission connection with the manual brake lever 171. The manual brake lever 171 is rotatably connected to the connecting seat 178, and in use, by operating the manual brake lever 171 to rotate relative to the connecting seat 178, the transmission rod 179 is driven to move along the axial direction of the piston 120, and further the piston 120 is driven to move relative to the cylinder block 110. Specifically, the unit brake cylinder 100 further includes a connecting rod 181 arranged between the transmission rod 179 and the manual brake lever 171, and two ends of the connecting rod 181 are rotatably connected to the transmission rod 179 and the manual brake lever 171, respectively, so as to convert the rotational movement of the manual brake lever 171 into linear sliding of the transmission rod 179. Optionally, the manual brake lever 171 includes a first connecting arm 172 and a second connecting arm 173, wherein the first connecting arm 172 is rotatably connected to the connecting seat 178 via a first pin shaft 174, and the second connecting arm 173 is rotatably connected to the connecting seat 178 via a second pin shaft 175. Specifically, the connecting seat 178 has a first support arm configured to be rotationally connected to the first connecting arm 172 and a second support arm configured to be rotationally connected to the second connecting arm 173, the first pin shaft 174 is connected to the first connecting arm 172 and inserted into the first support arm and rotatably connected to the first support arm, and the second pin shaft 175 is connected to the second connecting arm 173 and inserted into the second support arm and rotatably connected to the second support arm.
ON120017905AU 11
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Optionally, the first pin shaft 174 is screwed to the first connecting arm 172, the second pin shaft 175 is screwed to the second connecting arm 173, correspondingly, the first pin shaft 174 is provided with a first threaded portion, the second pin shaft 175 is provided with a second threaded portion, the first threaded portion has a rotation direction opposite to that of the second threaded portion, therefore, operation directions of screwing out the first pin shaft 174 and the second pin shaft 175 also should be opposite, but during use, the first connecting arm 172 and the second connecting arm 173 rotate synchronously and in the same direction, thus, the first pin shaft 174 and the second pin shaft 175 can be effectively prevented from being disengaged from the connecting seat 178 when the manual brake lever 171 rotates. Optionally, the unit brake cylinder 100 further includes a first elastic retaining ring 176 and a second elastic retaining ring 177, wherein the first elastic retaining ring 176 is disposed on a side of the first pin shaft 174 away from the connecting seat 178, so as to prevent the first pin shaft 174 from being disengaged from the connecting seat 178, and the second elastic retaining ring 177 is disposed on a side of the second pin shaft 175 away from the connecting seat 178, so as to prevent the second pin shaft 175 from being disengaged from the connecting seat 178, thereby improving the operation reliability of the unit brake cylinder 100. Referring to FIG. 2, in the present embodiment, a plurality of indicating color rings 154 are arranged on the front end housing 150, and the plurality of indicating color rings 154 are arranged at intervals along an axial direction of the front end housing 150. An end of the transmission rod extending out of the cylinder block 110 is provided with an alignment ring 1791, and a stroke position of the piston 120 is determined by a corresponding relationship between the alignment ring 1791 and the indicating color rings 154. Specifically, the indicating color rings 154 are provided on the first housing portion 151, the first housing portion 151 is arranged coaxially with the cylinder block 110, and meanwhile, the piston 120 is arranged coaxially with the cylinder block 110, that is, the axial direction of the front end housing 150 is the axial direction of the cylinder block 110, and meanwhile is also the axial direction of the piston 120. The plurality of indicating color rings 154 have different colors, so that the stroke position of the piston 120 can be determined more conveniently according to the corresponding relationship between the indicating color rings 154 and the alignment ring 1791.
FIG. 9 is an enlarged schematic view of a partial structure at IX in FIG. 3, and FIG. 10 is a structural schematic view of a respirator 190 in the unit brake cylinder 100 provided in an embodiment of the present disclosure. Referring to FIG. 2, FIG. 3, FIG. 9 and FIG. 10 in combination, in the present embodiment, the front end housing 150 is provided with a vent hole 155 communicating with the second chamber 113, and the vent hole 155 is configured for air to go into and out of the second chamber 113. Optionally, the unit brake cylinder 100 further includes a respirator 190 fixedly connected to the front end housing 150, the respirator is provided with a gas passage 191, and the gas passage 191
ON120017905AU 12
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communicates with the vent hole 155, so that the vent hole 155 communicates with the outside through the gas passage 191. Specifically, the vent hole 155 is provided at a lower portion of the front end housing 150, and correspondingly, the respirator 190 is mounted at a lower end of the front end housing 150. In this way, when water is accumulated in the second chamber 113, the accumulated water also may be discharged via the gas passage 191 through the vent hole 155. The gas passage 191 includes a first passage 192 and a second passage 193 connected to each other, the first passage 192 communicates with the vent hole 155, and the first passage 192 extends along a direction pointing from the second chamber 113 towards the first chamber 112. The extending direction of the second passage 193 is inclined relative to the first passage 192, and along the direction pointing from the second chamber 113 towards the first chamber 112, the distance between the second passage 193 and the first passage 192 decreases, that is, the second passage 193 is provided in a ramp shape, so that impurities such as dust accumulated in the gas passage 191 is automatically cleaned when the unit brake cylinder 100 brakes. The working principle of the unit brake cylinder 100 according to the present embodiment is as follows: in use, compressed air from a distribution valve (not shown in the drawings) enters the first chamber 112 via the vent portion 111, so as to push the piston 120 to move in the direction of compressing the second chamber 113 under the effect of pressure of the compressed air, thereby pushing the adjusting nut 141 to move in a same direction, until the limiting block 146 abuts against the limiting sleeve 162, subsequently, the piston 120 continues to move in the direction of compressing the second chamber 113 under the effect of pressure of the compressed air, the adjustment gap 147 is reduced, the connector143 is separated from the front clutch 133 until the brake-shoe contacts the wheels, and the connector 143 is separated from the rear clutch 131, and applies a braking force to the wheels through the brake-shoe. In the movement process of the piston 120, the transmission rod 179 moves in a direction to extend out of the second chamber 113, thus the stroke position of the piston 120 may be determined by observing the corresponding relationship between the alignment ring 1791 on the transmission rod 179 and the indicating color ring 154 on the first housing portion 151. Meanwhile, the second chamber 113 is compressed, and the gas in the second chamber 113 is discharged through the gas passage 191, and impurities such as dust accumulated in the gas passage 191 are discharged with the gas, thereby realizing automatic cleaning.
When the gap between the brake-shoe and the wheels increases, when the connector 143 moves to be separated from the front clutch 133, the brake-shoe is not in contact with the wheels, the connector 143 is in an intermediate state of being simultaneously disengaged from the front clutch 133 and the rear clutch 131, under the effect of tension of the adjusting spring 144, the adjusting screw 142 rotates, but does not axially move relative to the cylinder block 110, so as to drive the adjusting nut 141 to rotate relative to the adjusting screw 142, further forming a lead screw mechanism, the adjusting nut 141 moves relative ON120017905AU 13
ON120017905AU
to the adjusting screw 142 in a direction away from the piston 120, until the brake-shoe contacts the wheels and applies a braking force to the wheels, then the connector 143 is engaged with the rear clutch 131. The unit brake cylinder 100 and the integrated brake device 10 provided in the present embodiment at least have following advantages: for the unit brake cylinder 100 provided in the embodiments of the present disclosure, the limit of the rear clutch 131 is realized through the cooperation between the clamping block 132 and the snap-fit groove 124, and the axial limit of the rear clutch 131 and the piston 120 is ensured by the pressing effect of the positioning spring 134. Compared with the existing bolt connection mode, not only the structure is simplified to make the installation more convenient and quick, meanwhile, the influence of bolt loosening on operation reliability of the unit brake cylinder 100 during use is avoided, further the operation reliability of the unit brake cylinder 100 is ensured. The rotational connection between the manual brake lever 171 and the connecting seat 178 is realized through the two independent short pin shafts, which helps to simplify the structure, and meanwhile, the rotation directions of threads of the two pin shafts are opposite to each other, so that the pin shafts can be prevented from disengagement, moreover, the elastic retaining ring is provided on one side of the pin shafts away from the connecting seat 178, further avoiding disengagement of the pin shaft. Through the arrangement of the structure of the respirator 190, automatic cleaning of impurities such as dust accumulated in the gas passage 191 of the respirator 190 is realized, and the use is convenient. The integrated brake device 10 provided in the embodiment of the present disclosure includes the unit brake cylinder 100 mentioned above, which has all the functions of the unit brake cylinder 100. FIG. 11 is a structural schematic view of a push rod 230 in the integrated brake device 10 provided in an embodiment of the present disclosure. Referring to FIG. 1 and FIG. 11 in combination, the present embodiment further provides the integrated brake device 10, wherein the integrated brake device 10 includes a unit brake cylinder 10, a main brake beam 210, an auxiliary brake beam 220, the push rod 230 and a rotation lever 240. The number of rotation lever 240 is two, and the two rotation levers 240 are rotationally connected to the main brake beam 210, respectively, and the two ends of the unit brake cylinder 100 are rotationally connected to the two rotation levers 240, respectively, so as to realize the movable connection between the unit brake cylinder 100 and the main brake beam 210 through the two rotation levers 240. Correspondingly, the number of push rods 230 is set to two, and the two push rods 230 are rotatably connected to the two rotation levers 240, respectively, and meanwhile, one end of the two push rods 230 away from the rotation lever 240 is rotatably connected to the auxiliary brake beam 220. The push rod 230 of the integrated brake device 10 is configured in a retractable structure, so that in the case of severe wear of the brake-shoe and the wheels, the length of the push rod 230 can be adjusted to complement the brake-shoe slack adjuster 140 on the unit brake cylinder 100, so as to achieve greater brake-shoe wear compensation, and meanwhile, the structure of the ON120017905AU 14
ON120017905AU
whole integrated brake device 10 is more stable, and in the event of failure, the length of the push rod 230 can be manually adjusted to allow the brake-shoe to be separated from the wheel tread. Optionally, the push rod 230 includes a first screw 233, a second screw 234 and an adjustment nut 235. The first screw 233 and the second screw 234 are rotatably connected to the rotation lever 240 and the auxiliary brake beam 220, respectively, and the first screw 233 and the second screw 234 are both screwed with the adjustment nut 235, so that the first screw 233 and the second screw 234 are driven to get close to or away from each other by rotating the adjustment nut 235, thereby adjusting the distance between the first screw 233 and the second screw 234, and further realizing the length adjustment of the push rod 230.
The above-mentioned are merely embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto, and changes and substitutions that may be easily envisaged by a person skilled in the present art within the technical scope disclosed in the present disclosure should fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims. Industrial Applicability To sum up, the present disclosure provides the unit brake cylinder and the integrated brake device, which can simplify the structure to make the installation more convenient and quick, meanwhile, avoid the influence of bolt loosening on operation reliability of the unit brake cylinder during use, and further facilitate ensuring the operation reliability of the unit brake cylinder.
ON120017905AU 15

Claims (18)

  1. ON120017905AU
  2. What is claimed is: 1. A unit brake cylinder, comprising a cylinder block, a piston, a clutch assembly and a brake-shoe slack adjuster, wherein the piston is movably disposed within the cylinder block, and the piston is configured to divide an inner cavity of the cylinder block into a first chamber and a second chamber that are isolated from each other, the cylinder block has a vent portion communicating with the first chamber, and the vent portion is configured to ventilate the first chamber; the clutch assembly comprises a positioning spring and a rear clutch, the piston is provided with a snap-fit groove, the rear clutch is provided with a clamping block, and the clamping block is configured to be engaged with the snap-fit groove, so as to restrict the circumferential movement of the rear clutch relative to the piston; and the positioning spring is located in the second chamber, and two ends of the positioning spring are in contact with the brake-shoe slack adjuster and the clamping block, respectively, and the positioning spring is configured to press the clamping block against the piston, so as to restrict axial movement of the rear clutch relative to the piston. 2. The unit brake cylinder according to claim 1, wherein the brake-shoe slack adjuster comprises an adjusting nut, an adjusting spring, an adjusting spring seat, an adjusting screw and a connector, wherein an end of the adjusting screw is connected to the connector, and the connector is detachably connected to the rear clutch; the adjusting nut is screwed with the adjusting screw; the adjusting spring is sleeved on the adjusting nut, and two ends of the adjusting spring abut against the adjusting nut and the adjusting spring seat, respectively, so as to press the adjusting spring seat against the clutch assembly; and the adjusting screw is further provided with a limiting block, and the limiting block and the clutch assembly are provided at interval, so as to form an adjustment gap between the limiting block and the clutch, and an end of the positioning spring away from the clamping block abuts against the limiting block. 3. The unit brake cylinder according to claim 2, wherein the clutch assembly further comprises a front clutch fixedly connected to the piston, the front clutch is located in the second chamber, and an accommodating cavity is formed between the front clutch and the rear clutch with the accommodating cavity configured for allowing the connector to move therein, and the connector is detachably connected to the front clutch and the rear clutch, respectively. 4. The unit brake cylinder according to any one of claims 1-3, wherein an end surface of the piston close to the second chamber is provided with a plurality of bumps protruding along an axial direction of the piston, the plurality of bumps are provided at interval in the axial direction, and the snap-fit groove is formed between each two adjacent bumps; and the clamping block is clamped in the snap-fit groove, and the clamping block abuts against an end surface of the piston.
  3. ON120017905AU 16
  4. ON120017905AU
  5. 5. The unit brake cylinder according to claim 4, wherein each of the bumps comprises a first protrusion and a second protrusion, the first protrusion is fixedly connected to the piston, the second protrusion is fixedly connected to an end of the first protrusion away from the piston; and the first protrusion has a first end surface away from the piston, the clamping block has a second end surface away from the piston, and the first end surface and the second end surface form an abutment surface for the positioning spring to abut against.
  6. 6. The unit brake cylinder according to any one of claims 1-5, wherein the unit brake cylinder further comprises a front end housing, the front end housing is fixedly connected to the cylinder block, so as to close an inner cavity of the cylinder block; and the front end housing is sleeved on the brake-shoe slack adjuster.
  7. 7. The unit brake cylinder according to claim 6, wherein the unit brake cylinder further comprises a transmission rod, a manual brake lever and a connecting seat fixedly connected to the front end housing, the manual brake lever is rotatably connected to the connecting seat, one end of the transmission rod is fixedly connected to the piston, and the other end of the transmission rod extends out of the cylinder block, and is in transmission connection with the manual brake lever, so as to drive the piston to move through the manual brake lever.
  8. 8. The unit brake cylinder according to claim 7, wherein the front end housing is provided with a plurality of indicating color rings, and the plurality of indicating color rings are arranged at interval along an axial direction of the front end housing; and an end of the transmission rod extending out of the cylinder block is provided with an alignment ring, and a stroke position of the piston is determined by a corresponding relationship between the alignment ring and the indicating color rings.
  9. 9. The unit brake cylinder according to claim 7 or 8, wherein the manual brake lever comprises a first connecting arm and a second connecting arm, the first connecting arm is rotatably connected to the connecting seat via a first pin shaft, and the second connecting arm is rotatably connected to the connecting seat via a second pin shaft.
  10. 10. The unit brake cylinder according to claim 9, wherein the first pin shaft is screwed to the first connecting arm, the second pin shaft is screwed to the second connecting arm, and a rotation direction of threads of the first pin shaft is different from a rotation direction of threads of the second pin shaft.
  11. 11. The unit brake cylinder according to claim 9 or 10, wherein the unit brake cylinder further comprises a first elastic retaining ring and a second elastic retaining ring, the first elastic retaining ring is disposed on a side of the first pin shaft away from the connecting seat, so as to prevent the first pin shaft from being disengaged from the connecting seat; and the second elastic retaining ring is disposed on a side of the second pin shaft away from the
    ON120017905AU 17
    ON120017905AU
    connecting seat, so as to prevent the second pin shaft from being disengaged from the connecting seat.
  12. 12. The unit brake cylinder according to any one of claims 6-11, wherein the front end housing is provided with a vent hole communicating with the second chamber, and the vent hole is configured for allowing air to go into and out of the second chamber.
  13. 13. The unit brake cylinder according to claim 12, wherein the unit brake cylinder further comprises a respirator fixedly connected to the front end housing, the respirator is provided with a gas passage, and the gas passage communicates with the vent hole.
  14. 14. The unit brake cylinder according to claim 13, wherein the gas passage comprises a first passage and a second passage in communication with each other, the first passage communicates with the vent hole, and the first passage extends along a direction pointing from the second chamber towards the first chamber, an extending direction of the second passage is inclined relative to the first passage, and a distance between the first passage and the second passage decreases along the direction pointing from the second chamber towards the first chamber.
  15. 15. An integrated brake device, wherein the integrated brake device comprises the unit brake cylinder according to any one of claims 1-14.
  16. 16. The integrated brake device according to claim 15, wherein the integrated brake device further comprises a main brake beam, an auxiliary brake beam, a push rod and rotation levers, wherein two rotation levers are provided, two ends of the unit brake cylinder are movably connected to the main brake beam through the two rotation levers, respectively, and two ends of the push rod are connected to one of the two rotation levers and the auxiliary brake beam, respectively.
  17. 17. The integrated brake device according to claim 16, wherein the push rod is telescopic.
  18. 18. The integrated brake device according to claim 17, wherein the push rod comprises a first screw, a second screw and an adjustment nut, the adjustment nut is screwed to both the first screw and the second screw, so as to adjust a distance between the first screw and the second screw through the adjustment nut.
    ON120017905AU 18
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CN114962496B (en) * 2022-05-24 2023-06-27 徐州工业职业技术学院 Friction device
CN116065314B (en) * 2023-03-11 2024-05-14 浙江灏宇科技有限公司 Auxiliary pressure regulating and uniform dyeing device for cloth printing and dyeing

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US4036111A (en) * 1973-10-25 1977-07-19 Svenska Aktiebolaget Bromsregulator Device for discontinuing and automatically restoring the operational function of a spring brake actuator
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US2497343A (en) * 1945-12-04 1950-02-14 Bromsregulator Svenska Ab Automatic slack adjuster for brakes
US3891067A (en) * 1972-12-15 1975-06-24 Bromsregulator Svenska Ab Clearance-sensing slack adjuster for a vehicle brake-actuating pneumatic cylinder-piston unit
US4036111A (en) * 1973-10-25 1977-07-19 Svenska Aktiebolaget Bromsregulator Device for discontinuing and automatically restoring the operational function of a spring brake actuator
US4833975A (en) * 1986-06-27 1989-05-30 Bergische Stahl-Industrie Integrated manual brake device
US20140231192A1 (en) * 2011-07-26 2014-08-21 Nabtesco Corporation Unit brake

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