CN111322331A - Clearance adjustment device for disc brake - Google Patents
Clearance adjustment device for disc brake Download PDFInfo
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- CN111322331A CN111322331A CN201811543749.5A CN201811543749A CN111322331A CN 111322331 A CN111322331 A CN 111322331A CN 201811543749 A CN201811543749 A CN 201811543749A CN 111322331 A CN111322331 A CN 111322331A
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- Prior art keywords
- piston
- brake
- expansion sleeve
- adjustment device
- friction plate
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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
- F16D65/38—Slack adjusters
- F16D65/72—Slack adjusters hydraulic
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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
- F16D65/38—Slack adjusters
- F16D65/72—Slack adjusters hydraulic
- F16D65/76—Slack adjusters hydraulic self-acting in both directions
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a clearance adjusting device, which comprises: the method comprises the following steps: the cylinder shell is internally provided with a moving channel, one end of the moving channel is opened to form an opening part, and the bottom wall of the moving channel is provided with a fixed boss extending towards the opening part; the piston is movably arranged in the moving channel, and the outer side of the bottom wall of the piston extends out of the opening part and is provided with a friction plate; the stop assembly is arranged in the mounting cavity and can move under the driving of the piston; the expansion sleeve is sleeved on the fixed boss and is in interference fit with the fixed boss, and the expansion sleeve and the stop assembly are opposite to each other and spaced; one end of the elastic piece is connected with the stop assembly, and the other end of the elastic piece is connected with the expansion sleeve. Therefore, on one hand, the brake clearance is kept stable, so that the brake response time and the brake effect are kept stable; on the other hand, need not to set up driving piece and drive assembly, the structure is simpler, the space occupies lowly, low in production cost.
Description
Technical Field
The invention relates to the technical field of railway vehicles, in particular to a clearance adjusting device for a disc brake.
Background
The engineering vehicle mostly adopts a brake with a gapless adjusting function. The brake fluid with certain pressure is injected into the oil cylinder to push the piston to move, so that the friction plate is driven and the brake disc is pressed tightly, and the brake of the vehicle can be realized. However, when the brake disc of the conventional brake with the backlash adjustment function is worn, the backlash adjustment cannot be performed, which reduces the braking effect and increases the potential safety hazard.
Further, in the related art, the brake having the clearance adjusting function generally performs clearance compensation by a driving device, a double-threaded screw for transmission, a core shaft engaged with the double-threaded screw, and a spline or performs clearance adjustment by the driving device, an adjusting nut, a stopper, and the like. In this way, although the conventional clearance adjusting device can also adjust the brake clearance to keep the brake clearance stable, the conventional clearance adjusting device needs to be provided with a driving device to drive the clearance adjusting device, and has the disadvantages of complex structure, high cost, large occupied space and difficult arrangement.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to propose a slack adjuster for a disc brake that is capable of adjusting the braking slack, and that is simple in construction and takes up little space.
A clearance adjustment device for a disc brake according to an embodiment of the present invention includes: the cylinder shell is internally provided with a moving channel, one end of the moving channel is opened to form an opening part, and the bottom wall of the moving channel is provided with a fixed boss extending towards the opening part; the piston is movably arranged in the moving channel, the peripheral wall of the piston is spaced from the fixed boss to form an installation chamber, and the outer side of the bottom wall of the piston extends out of the opening part and is provided with a friction plate; the stop assembly is arranged in the mounting cavity and can move under the driving of the piston; the expansion sleeve is sleeved on the fixed boss and is in interference fit with the fixed boss, and the expansion sleeve and the stop assembly are opposite to each other and spaced apart; one end of the elastic piece is connected with the stop assembly, and the other end of the elastic piece is connected with the expansion sleeve.
According to the clearance adjusting device for the disc brake, provided by the embodiment of the invention, the expansion sleeve capable of moving relative to the cylinder body is arranged, and when the friction plate is worn and the braking clearance (braking stroke) is increased, the expansion sleeve is pushed to move through the stop assembly, so that the abrasion amount is transferred between the top wall of the piston and the cylinder shell. Therefore, on one hand, the brake clearance (brake stroke) is kept stable, so that the brake response time and the brake effect are kept stable; on the other hand, the clearance adjustment device of this embodiment need not to set up driving piece and drive assembly than traditional clearance adjustment device, through disc brake braking in-process, is used to some driving force, can realize the adjustment in braking clearance, and the structure is simpler, the space occupies lowly, low in production cost.
According to some embodiments of the invention, the friction plate is adapted to be stopped against a brake disc under the driving of a piston, and when the friction plate is not worn and the piston is in an initial position, the distance between the stop assembly and the expansion sleeve is not less than the distance between the friction plate and the brake disc.
In some embodiments, the distance between the stop assembly and the expansion sleeve is equal to the distance between the friction plate and the brake disc.
According to some embodiments of the invention, an inner end of the expansion sleeve is opposite to and spaced apart from the stopper assembly, an outer end of the expansion sleeve has a flange portion, and the other end of the elastic member is stopped against the flange portion.
In some embodiments, the stop assembly comprises: the check ring is fixed on the piston; the bush is sleeved on the fixed boss and clamped between the check ring and one end of the elastic piece.
Further, the bushing includes: the sleeve part is sleeved on the fixed boss; the stop part is arranged at the end part of the sleeve part and extends along the radial direction of the sleeve part in the direction far away from the sleeve part, and the one end of the elastic piece is stopped on the stop part.
In some embodiments, the fixing boss comprises: the base is fixedly arranged on the bottom wall of the moving channel; the fixed rod is detachably arranged on the base, and an expansion sleeve is sleeved on the periphery of the fixed rod.
Further, the base and the cylinder shell are integrally formed, and the fixing rod is in threaded fit with the base.
Optionally, the gap adjusting apparatus further includes: a drive member adapted to drive the piston to move within the travel channel to selectively stop the friction plate against the brake pad.
Further, the driving piece is a hydraulic machine, and the cylinder shell, the inner end of the piston and the retainer ring define a pressure cavity connected with the hydraulic machine.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a gap adjustment apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic brake clearance diagram of a slack adjuster mechanism according to an embodiment of the invention when not worn;
FIG. 3 is a schematic illustration of a brake clearance after wear of a clearance adjustment apparatus according to an embodiment of the present invention;
fig. 4 is a schematic view of the adjusted brake clearance of the clearance adjustment device according to the embodiment of the invention.
Reference numerals:
the play set 100, the brake rotor 200,
a cylinder housing 10, a fixing boss 11, a base 111, a fixing rod 112,
the piston 20, the stopper assembly 30, the retainer ring 31, the bush 32, the sleeve portion 321, the stopper portion 322,
an expansion sleeve 40, a flanging part 41, an elastic piece 50,
a moving passage a, an opening b, a mounting chamber c, a pressure chamber d,
the distance between the outer side surface of the bottom wall of the piston and the side surface of the top wall is A, the distance between the end surface of the bushing facing the expansion sleeve and the end surface of the expansion sleeve facing the bushing is B, the distance between the outer side surface and the inner side surface of the bottom wall of the piston is C, the abrasion loss of the friction plate is △, the preset brake clearance (brake stroke) is S, and the brake stroke S when the piston is not adjusted after being abraded is S1。
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Firstly, in the prior art, friction plates are arranged on two sides of a brake disc of a disc brake, a rear friction plate is fixedly connected with a piston, and the piston can axially move along a floating caliper body; the motor stator is arranged on the floating caliper body, the motor rotor is connected with a central wheel of the planetary gear speed reducing mechanism, the planet carrier is fixedly connected with the lead screw, and the lead screw and a threaded hole of the spline shaft form thread transmission to convert the rotary motion of the brake motor into linear motion; the adjusting screw is connected with the spline shaft through the thrust bearing, and a gap adjusting mechanism is arranged between the adjusting screw and the adjusting support frame, so that the gap between the brake disc and the friction plate can be automatically adjusted, the constancy of the braking response speed of the vehicle is ensured, and the braking performance is further ensured.
That is, in the prior art, the gap adjusting device includes at least a motor and a transmission assembly. The adjustment of the braking clearance is generally performed by driving a transmission assembly through a motor, and then driving a piston and a friction plate connected to the piston to move toward a brake disc through the transmission assembly, so as to adjust the braking clearance by the movement amount, thereby maintaining the stability of the braking clearance.
Furthermore, in the gap adjusting device in the prior art, a driving part and a transmission assembly need to be arranged or the driving part directly acts on the piston, so that the structure is complex, the production cost is high, and the occupied space is large. Based on this, the present invention provides a gap adjustment device 100, the gap adjustment device 100 does not need to provide a driving member (such as a motor) and a transmission assembly, has a simpler structure, and can further reduce the space occupation, simplify the structure, and reduce the production cost on the premise of realizing the brake gap adjustment.
A lash adjustment device 100 for a disc brake according to an embodiment of the present invention is described below with reference to fig. 1 to 4.
As shown in fig. 1 to 4, a gap adjusting apparatus 100 for a disc brake according to an embodiment of the present invention includes: cylinder shell 10, piston 20, stop assembly 30, expansion sleeve 40 and elastic member 50.
Wherein, a moving channel a is arranged in the cylinder shell 10, one end of the moving channel a is opened to form an opening part b, and a fixing boss 11 extending towards the opening part b is arranged on the bottom wall of the moving channel a; the piston 20 is movably arranged in the moving channel a, the peripheral wall of the piston 20 is spaced from the fixed boss 11 to form a mounting chamber c, the outer side of the bottom wall of the piston 20 extends out of the opening part b and is provided with a friction plate (not shown in the figure); the stop assembly 30 is arranged in the mounting chamber c and can move under the driving of the piston 20; the expansion sleeve 40 is sleeved on the fixed boss 11 and is in interference fit with the fixed boss 11, and the expansion sleeve 40 and the stop assembly 30 are opposite to each other and spaced apart; one end of the elastic member 50 is connected to the stopper assembly 30, and the other end of the elastic member 50 is connected to the expansion sleeve 40.
Specifically, the piston 20 is slidably disposed on the cylinder housing 10, a friction plate is connected to an outer side surface of the piston 20 facing away from a bottom wall of the cylinder housing 10, a stop assembly 30 is disposed between a top wall of the piston 20 facing the cylinder housing 10 and the fixing boss 11, an expansion sleeve 40 is disposed between the stop assembly 30 and the bottom wall of the piston 20, the expansion sleeve 40 is disposed adjacent to the bottom wall of the piston 20, and an elastic member 50 is disposed between the expansion sleeve 40 and the bushing 32.
Wherein the piston 20 and the stopper assembly 30 are adapted to move toward the brake disc 200 under the pushing of hydraulic oil or air pressure flowing into the cylinder housing 10 to push the friction plates to clamp the brake disc 200, thereby achieving braking, and in the process, the expansion sleeve 40 does not move relative to the cylinder housing 10.
Furthermore, when the friction plate is worn after long-term use, the piston 20 and the stop assembly 30 push the friction plate to move towards the brake disc 200 again, the stop assembly 30 pushes the expansion sleeve 40 to move towards the brake disc 200 relatively away from the cylinder shell 10, and after braking is completed, the elastic element 50 pushes the stop assembly 30 to move, and the expansion sleeve 40 stays at the pushed position, so that a gap generated by friction plate wear is transferred between the top wall of the piston 20 and the cylinder shell 10, the distance (namely, a braking gap or a braking stroke) between the friction plate and the brake disc 200 is kept unchanged, and braking gap adjustment is realized.
It should be noted that the brake clearance represents the same physical quantity as the braking stroke, and both refer to the distance between the friction pad and the brake disk 200, and since the friction pad is not shown in the drawing, the distance between the outer side surface of the bottom wall of the piston 20 and the brake disk 200 is shown as the brake clearance in the drawing.
According to the lash adjuster 100 for a disc brake of the embodiment of the present invention, by providing the expansion sleeve 40 movable relative to the cylinder housing 10, and when the friction plates are worn to cause an increase in braking clearance (braking stroke), the expansion sleeve 40 is pushed to move by the stopper assembly 30 to transfer the amount of wear between the top wall of the piston 20 and the cylinder housing 10. Therefore, on one hand, the brake clearance (brake stroke) is kept stable, so that the brake response time and the brake effect are kept stable; on the other hand, the clearance adjustment device 100 of this embodiment need not to set up driving piece and drive assembly than traditional clearance adjustment device 100, through the disc brake braking in-process, is used to some driving force, can realize the adjustment in braking clearance, and the structure is simpler, the space occupies lowly, low in production cost.
The distance between the outer side surface of the bottom wall of the piston 20 and the side surface of the top wall is a, the distance between the end surface of the bush 32 facing the expansion bush 40 and the end surface of the expansion bush 40 facing the bush 32 is B, and the distance between the outer side surface and the inner side surface of the bottom wall of the piston 20C, the friction plate abrasion amount is △, the preset brake clearance (brake stroke) is S, and the brake stroke S is not adjusted after abrasion1。
According to some embodiments of the present invention, the friction plate is adapted to be stopped against the brake disc 200 under the driving of the piston 20, and when the friction plate is not worn and the piston 20 is in the initial position, the distance between the stopper assembly 30 and the expansion sleeve 40 is not less than the distance between the friction plate and the brake disc 200.
Thus, when the piston 20 and the stopper assembly 30 are pushed by hydraulic oil or air pressure in the cylinder housing 10 toward the disc 200, the bush 32 does not act on the expansion sleeve 40, so that the expansion sleeve 40 does not move toward the disc 200, and the operational stability of the disc brake in a state where the friction pads are not worn can be improved.
Further, in some preferred embodiments, the distance between the stop assembly 30 and the expansion sleeve 40 is made equal to the distance between the friction plate and the brake disc 200.
Specifically, when the braking clearance is adjusted, the piston 20 and the stopper assembly 30 may move towards the brake disc 200 by a length S of a preset braking clearance under the driving of the hydraulic oil, and directly stop the stopper assembly 30 against the expansion sleeve 40 after reaching the preset braking clearance length, so that the stopper assembly 30 continues to push the expansion sleeve 40 to move towards the brake disc 200, and the moving length at this time is △, so that the stopper assembly 30 pushes the expansion sleeve 40 to move △ towards the brake disc 200, so that the wear amount △ of the friction plate is shifted to the side of the piston 20 and the cylinder housing 10.
Therefore, the brake clearance can be adjusted more quickly and accurately.
As shown in fig. 1 to 4, the inner end of the expansion sleeve 40 is opposite to and spaced apart from the stopper assembly 30, the outer end of the expansion sleeve 40 has a flanged portion 41, and the other end of the elastic member 50 is stopped against the flanged portion 41. That is, one end of the elastic element 50 abuts against the stopper assembly 30, and the other end of the elastic element 50 abuts against the flanged portion 41.
Thus, on one hand, the elastic element 50 is arranged between the stop assembly 30 and the expansion sleeve 40, so that the distance between the stop assembly 30 and the bushing 32 can be kept stable (namely, the distance between the stop assembly 30 and the bushing is always B), and the braking stability can be improved; on the other hand, by providing the burring 41 and keeping the outer diameter of the burring 41 consistent with the inner diameter of the piston 20, the bushing 32 can be prevented from wobbling relative to the piston 20, and the fitting stability of the expansion sleeve 40 and the piston 20 can be improved on the premise of having a stable braking effect.
In some embodiments, the stop assembly 30 includes: a retainer 31 and a bush 32, the retainer 31 being fixed to the piston 20; the bush 32 is sleeved on the fixing boss 11 and clamped between the retainer ring 31 and one end of the elastic element 50. Thus, the retainer ring 31 receives the pushing force provided by at least part of the hydraulic oil to push the bush 32 to move, and the bush 32 is provided to prevent the hydraulic oil from entering the mounting chamber c defined by the piston 20 and the fixing boss 11.
As shown in fig. 2 and 3, the bushing 32 includes: the sleeve part 321 and the stop part 322, wherein the sleeve part 321 is sleeved on the fixing boss 11; the abutting portion 322 is disposed at an end of the sleeve portion 321 and extends in a direction away from the sleeve portion 321 along a radial direction of the sleeve portion 321, and one end of the elastic member 50 abuts against the abutting portion 322. Thus, the bush 32 is more rational in structure, and is connected to the fixed boss 11 via the sleeve portion 321, and pushes the expansion sleeve 40 via the stopper portion 322 when the gap is adjusted.
In some embodiments, the fixing boss 11 includes: a base 111 and a fixing rod 112, the base 111 is fixedly arranged on the bottom wall of the moving channel a; the fixing rod 112 is detachably arranged on the base 111, and the expansion sleeve 40 is sleeved on the periphery of the fixing rod 112. Wherein, the expansion sleeve 40 and the fixed rod 112 are in interference fit, and the interference fit force between the expansion sleeve and the fixed rod is 3000N +/-100N. Thus, when the brake clearance adjustment is not required, the relative movement between the expansion sleeve 40 and the fixing rod 112 can be prevented, thereby improving the operational stability of the clearance adjustment apparatus 100.
Further, a base 111 is integrally formed with the cylinder housing 10, and a fixing rod 112 is screw-fitted to the base 111. Therefore, on the one hand, the base 111 is integrally formed with the cylinder housing 10, so that the machining efficiency of the gap adjusting device 100 can be improved; on the other hand, the fixing rod 112 is in threaded fit with the base 111, so that the connection between the fixing rod 112 and the base is firmer and more reliable, and the fixing rod 112 is convenient to detach and replace.
According to some embodiments of the invention, the gap adjusting apparatus 100 further comprises: a driving member adapted to drive the piston 20 to move in the moving passage a to selectively stop the friction plate against the brake pad.
That is, the driving member of the present embodiment is substantially different from the driving member of the conventional lash adjusting device, in which the driving member only acts to adjust the braking lash, and the driving member of the present embodiment can drive the friction plate to move toward the brake disc 200 for braking, or can drive the expanding sleeve 40 to move through the stopper assembly 30 for adjusting the braking lash while braking.
Further, the driving member is a hydraulic machine, and the cylinder housing 10, the inner end of the piston 20 and the retainer ring 31 define a pressure chamber d connected to the hydraulic machine. Thereby, hydraulic oil is injected into the pressure chamber d to drive the piston 20 to move, so that adjustment of the braking gap and braking can be achieved.
Next, a gap adjustment process according to an embodiment of the present invention will be described in detail with reference to fig. 2 to 4.
As shown in fig. 2, when the friction plate is not worn, the distance between the outer side surface of the bottom wall of the piston 20 and the side surface of the top wall is a, the distance between the end surface of the bush 32 facing the expansion bush 40 and the end surface of the expansion bush 40 facing the bush 32 is B, the distance between the outer side surface and the inner side surface of the bottom wall of the piston 20 is C, and the braking clearance (braking stroke) is S.
At this time, the hydraulic oil acts on the piston 20 and the stopper assembly 30, and the piston 20 and the stopper assembly 30 move toward the disc 200 by a distance S toward the disc 200, so that the friction plates are clamped against the disc 200 to perform braking.
As shown in fig. 3, when the friction plate is worn, the wear amount of the friction plate is △, the distance between the outer side surface of the bottom wall of the piston 20 and the side surface of the top wall is a- △, the distance between the end surface of the bush 32 facing the expansion sleeve 40 and the end surface of the expansion sleeve 40 facing the bush 32 is B, the distance between the outer side surface and the inner side surface of the bottom wall of the piston 20 is C- △, the wear amount of the friction plate is △, and the braking clearance (braking stroke) is S1(wherein, S1＝S+△)。
At this time, the hydraulic oil acts on the piston 20 and the stopper assembly 30, the piston 20 and the stopper assembly 30 move toward the disc 200, and the distance S of movement toward the disc 200 is set1To effect braking, and during braking, the bushing 32 pushes the expansion sleeve 40 to move △ length toward the brake disc 200, and after braking is completed, the piston 20, the elastic member 50, the stopper assembly 30 and the expansion sleeve 40 move reversely by S length, so that the braking gap is still S, and the wear amount △ is transferred between the cylinder housing 10 and the piston 20, to effect adjustment of the braking gap (see fig. 4).
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A lash adjustment device for a disc brake, comprising:
the cylinder shell is internally provided with a moving channel, one end of the moving channel is opened to form an opening part, and the bottom wall of the moving channel is provided with a fixed boss extending towards the opening part;
the piston is movably arranged in the moving channel, the peripheral wall of the piston is spaced from the fixed boss to form a mounting chamber, and the outer side of the bottom wall of the piston extends out of the opening part and is provided with a friction plate;
the stop assembly is arranged in the installation cavity and can move under the driving of the piston;
the expansion sleeve is sleeved on the fixed boss and is in interference fit with the fixed boss, and the expansion sleeve and the stop assembly are opposite to each other and are spaced apart;
one end of the elastic piece is connected with the stop assembly, and the other end of the elastic piece is connected with the expansion sleeve.
2. A lash adjustment device for a disc brake as claimed in claim 1, wherein the friction plate is adapted to be brought into abutment with a brake disc by the piston, and the distance between the stop assembly and the expansion sleeve is no less than the distance between the friction plate and the brake disc when the friction plate is unworn and the piston is in the initial position.
3. A lash adjustment device for a disc brake as claimed in claim 2, wherein the distance between the stop assembly and the expansion sleeve is equal to the distance between the friction plate and the brake disc.
4. A lash adjustment device for a disc brake as claimed in any one of claims 1 to 3, wherein an inner end of the expansion sleeve is opposed to and spaced from the stop assembly, an outer end of the expansion sleeve has a flange portion against which the other end of the resilient member abuts.
5. A lash adjustment device for a disc brake as claimed in claim 1, wherein the stop assembly comprises:
a retainer ring fixed to the piston;
the bush is sleeved on the fixed boss and clamped between the check ring and one end of the elastic piece.
6. A lash adjustment device for a disc brake according to claim 5, wherein the bushing comprises:
the sleeve part is sleeved on the fixed boss;
the stop part is arranged at the end part of the sleeve part and extends along the radial direction of the sleeve part in the direction far away from the sleeve part, and the one end of the elastic piece is stopped on the stop part.
7. A lash adjustment device for a disc brake as claimed in claim 2, wherein the fixing boss includes:
the base is fixedly arranged on the bottom wall of the moving channel;
the fixing rod is detachably arranged on the base, and an expansion sleeve is sleeved on the periphery of the fixing rod.
8. A lash adjustment device for a disc brake as claimed in claim 7, wherein the base is integrally formed with the cylinder housing, the fixing rod being screw-fitted with the base.
9. A lash adjustment device for a disc brake according to claim 5, further comprising: a drive member adapted to drive the piston to move within the travel channel to selectively stop the friction plate against the brake pad.
10. A lash adjustment device for a disc brake as claimed in claim 9, wherein the drive member is a hydraulic machine, the cylinder housing, the inner end of the piston and the retainer ring defining a pressure chamber connected to the hydraulic machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543749.5A CN111322331A (en) | 2018-12-17 | 2018-12-17 | Clearance adjustment device for disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543749.5A CN111322331A (en) | 2018-12-17 | 2018-12-17 | Clearance adjustment device for disc brake |
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| Publication Number | Publication Date |
|---|---|
| CN111322331A true CN111322331A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811543749.5A Pending CN111322331A (en) | 2018-12-17 | 2018-12-17 | Clearance adjustment device for disc brake |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531017A (en) * | 2021-09-17 | 2021-10-22 | 中车戚墅堰机车车辆工艺研究所有限公司 | Wear compensation device of driving disc brake and self-compensation method thereof |
| CN114056297A (en) * | 2022-01-12 | 2022-02-18 | 中车戚墅堰机车车辆工艺研究所有限公司 | Hydraulic braking device for vehicle and control system thereof |
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| CN114056297A (en) * | 2022-01-12 | 2022-02-18 | 中车戚墅堰机车车辆工艺研究所有限公司 | Hydraulic braking device for vehicle and control system thereof |
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Country or region after: China Address after: 213011 258 Wuyi Road, Changzhou, Jiangsu Applicant after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Address before: 213011 258 Wuyi Road, Changzhou, Jiangsu Applicant before: CRRC QISHUYAN INSTITUTE Co.,Ltd. Country or region before: China |