CN203655982U - Gap adjusting mechanism of air pressure disk brake - Google Patents
Gap adjusting mechanism of air pressure disk brake Download PDFInfo
- Publication number
- CN203655982U CN203655982U CN201320826951.5U CN201320826951U CN203655982U CN 203655982 U CN203655982 U CN 203655982U CN 201320826951 U CN201320826951 U CN 201320826951U CN 203655982 U CN203655982 U CN 203655982U
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- flange
- ring
- needle bearing
- step shaft
- overload clutch
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Abstract
The utility model discloses a gap adjusting mechanism of an air pressure disk brake. The gap adjusting mechanism comprises a shifting fork, a flange, balls, an overload clutch, an adjusting shaft and a fixing disk, wherein the flange is provided with a step shaft and a flange disk, an inner hole of the shifting fork is matched with an outer ring of a one-way rolling needle bearing, an inner ring of the one-way rolling needle bearing is installed on the step shaft of the flange, a plurality of first pits are formed in the lower end face of the flange disk of the flange, a plurality of second pits corresponding to the first pits of the flange are formed in the upper end face of the shell of the overload clutch, the balls are contained in cavities formed between the first pits and the corresponding second concave pits, a spline groove is formed in the inner wall of the shell of the overload clutch, spline teeth are arranged on the periphery of a fixing wheel, the spline teeth are matched with the spline groove, a tensioning spring is arranged between the fixing disk and the shifting fork, check rings are arranged on the flange and located at one end of the one-way rolling needle bearing and one end of the step shaft for blocking, and an abrasion-resistant sheet is installed between a boss of the adjusting shaft and the fixing disk. The gap adjusting mechanism is simple in structure and reliable in performance.
Description
Technical field
The utility model relates to a kind of disk type braker of pneumatic control, especially relates to a kind of gap adjusting mechanism.
Background technique
The disk type braker of pneumatic control is applied in urban public traffic vehicles, medium-to-high grade sightseeing bus, heavily loaded goods carrying vehicle now more and more.
The type disk type braker is made up of unsteady caliper, bracket, brake slipper, brake disc.The caliper that wherein floats is made up of brake lever, hold down gag, Returnning spring, gap adjusting mechanism.The major function of gap adjusting mechanism is the wearing and tearing of compensation brake slipper in braking process, guarantee that the air gap between brake slipper and brake disc is constant, be on active service the stage at disk type braker, air gap value should not depend on the state of wear of brake slipper and polishing machine and keep constant.
Reduce because the gap adjusting mechanism of pneumatic control disk type braker can only make gap excessive between brake slipper and brake disc, and can not increase the gap between brake slipper and brake disc, therefore clearance adjustment mechanism should possess unidirectional regulatory function.And in order to eliminate excessive braking force, gap adjusting mechanism must have torque overload protective function, overload protection function is normally realized by overload clutch.The unidirectional adjustment function of gap adjusting mechanism of prior art mainly realizes by helical torsional spring, this structure has proposed very high requirement to the performance of helical torsional spring, and domestic material and technique are difficult to bonding to stability and the reliability of adjusting function.The overload protection function of the gap adjusting mechanism of prior art is realized by multiplate clutch sheet, and this complicated structure is high to material requirements, and then has increased cost.
Summary of the invention
The purpose of this utility model has been to provide a kind of gap adjusting mechanism of air-pressure disc brake of simple in structure, reliable performance.
In order to achieve the above object, the technical solution of the utility model is: a kind of gap adjusting mechanism of air-pressure disc brake, comprise shift fork, flange, ball, overload clutch, adjusting axle and fixed tray, described fixed tray and flange are rotatably assorted and are sleeved on adjusting axle, described shift fork is enclosed within outside flange, described overload clutch is positioned at the bottom of adjusting axle, described overload clutch comprises housing, spring and fast pulley, one end and the inner walls of spring offset, the other end and fast pulley offset, fast pulley is fixed on the bottom of adjusting axle, the periphery of described housing is provided with external splines, described flange has Step Shaft and flange plate, Step Shaft is upper, flange plate under, the endoporus of described shift fork coordinates with the outer ring of a unidirectional needle bearing, the inner ring of unidirectional needle bearing is arranged on the Step Shaft of flange, the lower end surface of the flange plate of described flange has several the first pits, the upper-end surface of the housing of described overload clutch has several second pits corresponding with the first pit of flange, described ball is contained in the cavity volume forming between the first pit and corresponding the second pit, the inwall of the housing of described overload clutch has spline, the periphery of fast pulley has spline tooth, spline tooth coordinates with spline, between described fixed tray and shift fork, be provided with tension spring, described flange is provided with back-up ring, back-up ring keeps off in one end of unidirectional needle bearing and one end of Step Shaft, between the boss of described adjusting axle and fixed tray, wear plate is installed.
The lower end of described adjusting axle has flat gesture, and adjusting axle is riveted together by the endoporus of flat gesture and fixed block.
The upper end of described Step Shaft has counterbore, and described back-up ring is the sleeve with flanging, and the flanging part of back-up ring and the upper end of unidirectional needle bearing offset, and counterbore bottom is stretched in the sleeve part of back-up ring.
Adopt after said structure, the utility model is when between brake slipper and brake disc when excesssive gap, and in braking state, actuating mechanism brake lever is actuated the fixing contact pin of shift fork, drives shift fork to rotate; Due to the effect of unidirectional needle bearing, shift fork and flange are locked, and flange rotates under the drive of shift fork; Do not have when excessive at rotation torque, flange drives clutch housing to rotate together by ball; The threaded pipe rotation that rotarily drives disk type braker of clutch housing, thus gap eliminated.After braking is cancelled, actuating mechanism brake lever drives shift fork counterrotating, and now unidirectional needle bearing allows to relatively rotate between shift fork and flange, and therefore flange does not rotate, clutch housing does not have counterrotating, and therefore the gap in original excessive gap is eliminated.The utility model adopts unidirectional needle bearing to replace the helical torsional spring of prior art, and therefore, simple in structure, stability and reliability are high.
Accompanying drawing explanation
The embodiment who provides below in conjunction with accompanying drawing is described in further detail the utility model.
Fig. 1 is the structural representation of the gap adjusting mechanism of air-pressure disc brake of the present utility model;
Fig. 2 is the perspective view of the shift fork of Fig. 1;
Fig. 3 is the B portion partial enlarged drawing of Fig. 1;
Fig. 4 is the A-A sectional view of Fig. 1.
Embodiment
As shown in Fig. 1 ~ 4, a kind of gap adjusting mechanism of air-pressure disc brake, comprise shift fork 1, flange 3, ball 4, overload clutch 5, adjusting axle 7 and fixed tray 8, described fixed tray 8 and flange 3 are rotatably assorted and are sleeved on adjusting axle 7, described shift fork 1 is enclosed within outside flange 3, described overload clutch 5 is positioned at the bottom of adjusting axle 7, described overload clutch 5 comprises housing 5-1, spring 5-2 and fast pulley 6, one end of spring 5-2 and housing 5-1 inwall offset, the other end and fast pulley 6 offset, fast pulley 6 is fixed on the bottom of adjusting axle 7, the periphery of described housing 5-1 is provided with external splines 5-1-1, described flange 3 has Step Shaft 3-1 and flange plate 3-2, Step Shaft 3-1 is upper, flange plate 3-2 under, the endoporus of described shift fork 1 coordinates with the outer ring of a unidirectional needle bearing 2, the inner ring of unidirectional needle bearing 2 is arranged on the Step Shaft 3-1 of flange 3, the lower end surface of the flange plate 3-2 of described flange 3 has several first pits 3-2-1, the upper-end surface of the housing 5-1 of described overload clutch 5 has several second pit 5-1-1s corresponding with the first pit 3-2-1 of flange 3, described ball 4 is contained in the cavity volume forming between the first pit 3-2-1 and corresponding the second pit 5-1-1, the inwall of the housing 5-1 of described overload clutch 5 has spline 5-3, the periphery of fast pulley 6 has spline tooth 6-1, spline tooth 6-1 coordinates with spline 5-3, between described fixed tray 8 and shift fork 1, be provided with tension spring 10, described flange 3 is provided with back-up ring 11, back-up ring 11 keeps off the one end at one end of unidirectional needle bearing 2 and Step Shaft 3-1, between the boss 7-1 of described adjusting axle 7 and fixed tray 8, wear plate 9 is installed.
Described the first pit 3-2-1, the second pit 5-1-1 and ball 4 quantity equate, have a ball 4 in each cavity volume.
As shown in Fig. 1,4, the lower end of described adjusting axle 7 has flat gesture 7-2, and adjusting axle 7 is riveted together by the endoporus 6-2 of flat gesture 7-2 and fixed block 6.
As shown in Figure 1, the upper end of described Step Shaft 3-1 has counterbore 3-1-1, and described back-up ring 11 is the sleeve with flanging, and the flanging part of back-up ring 11 and the upper end of unidirectional needle bearing 2 offset, and counterbore 3-1-1 bottom is stretched in the sleeve part of back-up ring 11.
As shown in Fig. 1 ~ 4, when the utility model uses, at air-pressure disc brake normal brake application state, in the time that the air gap between brake slipper and brake disc exceedes setting air gap value, from the fixing contact pin 1-1 rotation that rotarily drives shift fork 1 of Disk Brake lever, and then drive shift fork 1 to rotate; In braking state, unidirectional needle bearing 2 is in locking state, and the rotation of shift fork 1 drives flange 3 to rotate by unidirectional needle bearing 2.
Do not exceed if transmit from flange 3 rotation torque coming the Maximum Torque that overload protective device sets, flange 3 will drive overload clutch housing 5-1 to be rotated by ball 4; Clutch housing 5-1 inside has some spline 5-3, the outer ring of fixed block 6 has some spline tooth 6-1, coordinate transmitting torque with the spline 5-3 of clutch housing 5, endoporus 6-2 and the adjusting axle 7 of fixed block 6 are riveted together, the rotation of clutch housing 5-1 is delivered on adjusting axle 7 by the endoporus 6-2 of spline 5-3, external splines 5-1-1, fixed block 6, and adjusting axle 7 is synchronously rotated with clutch housing 5-1; Between adjusting axle 7 and fixed tray 8, there is antifriction sheet 9, allow adjusting axle 7 to rotate with respect to fixed tray 8.The outside of clutch housing 5-1 has external splines 5-1-1, and external splines 5-1-1 drives the screw rod of disk type braker to be rotated, and the rotation of screw rod is converted into axial displacement, has eliminated the gap between brake slipper and brake disc.
After the gap between brake slipper and brake disc is eliminated; brake slipper is pressed close to brake disc; can increase suddenly from the rotation torque of shift fork 1 and flange 3 so; in the time that moment of torsion exceedes the Maximum Torque that overload protective device sets; all balls 4 are moving to adjacent another to pit 3-2-1,5-1-1 from a pair of pit 3-2-1,5-1-1; eliminated the rotation torque from flange 3, clutch housing 5-1 will no longer rotate with flange 3 jointly so.
When release of brake, between brake slipper and brake disc, produce air gap, in the time that air gap just will exceed setting air gap, brake lever drives the fixing contact pin 1-1 opposite spin of shift fork 1, and then drive shift fork 1 opposite spin, now unidirectional needle bearing 2 is in releasing orientation, and flange 3 can not be followed shift fork 1 counterrotating together, and clutch housing 5-1 also can not be rotated.Therefore the air gap being eliminated in braking state can't regenerate, thereby has played the effect of compensate for clearance.
Claims (3)
1. the gap adjusting mechanism of an air-pressure disc brake, comprise shift fork (1), flange (3), ball (4), overload clutch (5), adjusting axle (7) and fixed tray (8), described fixed tray (8) and flange (3) are rotatably assorted and are sleeved on adjusting axle (7), described shift fork (1) is enclosed within outside flange (3), described overload clutch (5) is positioned at the bottom of adjusting axle (7), described overload clutch (5) comprises housing (5-1), spring (5-2) and fast pulley (6), one end of spring (5-2) and housing (5-1) inwall offset, the other end and fast pulley (6) offset, fast pulley (6) is fixed on the bottom of adjusting axle (7), the periphery of described housing (5-1) is provided with external splines (5-1-1), it is characterized in that:
A, described flange (3) have Step Shaft (3-1) and flange plate (3-2), and Step Shaft (3-1) is upper, flange plate (3-2) under,
The endoporus of b, described shift fork (1) coordinates with the outer ring of a unidirectional needle bearing (2), and the inner ring of unidirectional needle bearing (2) is arranged on the Step Shaft (3-1) of flange (3),
The lower end surface of the flange plate (3-2) of c, described flange (3) has several the first pits (3-2-1), the upper-end surface of the housing (5-1) of described overload clutch (5) has several second pits (5-1-1) corresponding with first pit (3-2-1) of flange (3), described ball (4) is contained in the cavity volume forming between the first pit (3-2-1) and corresponding the second pit (5-1-1)
The inwall of the housing (5-1) of d, described overload clutch (5) has spline (5-3), and the periphery of fast pulley (6) has spline tooth (6-1), and spline tooth (6-1) coordinates with spline (5-3),
Between e, described fixed tray (8) and shift fork (1), be provided with tension spring (10),
F, described flange (3) are provided with back-up ring (11), and back-up ring (11) keeps off in one end of unidirectional needle bearing (2) and one end of Step Shaft (3-1),
Between the boss (7-1) of g, described adjusting axle (7) and fixed tray (8), wear plate (9) is installed.
2. the gap adjusting mechanism of air-pressure disc brake according to claim 1, it is characterized in that: the lower end of described adjusting axle (7) has flat gesture (7-2), adjusting axle (7) is riveted together by flat gesture (7-2) and the endoporus (6-2) of fixed block (6).
3. the gap adjusting mechanism of air-pressure disc brake according to claim 1, it is characterized in that: the upper end of described Step Shaft (3-1) has counterbore (3-1-1), described back-up ring (11) is the sleeve with flanging, the upper end of the flanging part of back-up ring (11) and unidirectional needle bearing (2) offsets, and counterbore (3-1-1) bottom is stretched in the sleeve part of back-up ring (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320826951.5U CN203655982U (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism of air pressure disk brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320826951.5U CN203655982U (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism of air pressure disk brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203655982U true CN203655982U (en) | 2014-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320826951.5U Expired - Fee Related CN203655982U (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism of air pressure disk brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203655982U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629279A (en) * | 2013-12-16 | 2014-03-12 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gap adjusting mechanism for air pressure disc brake |
| CN104455119A (en) * | 2014-12-17 | 2015-03-25 | 南车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjuster |
| CN105090296A (en) * | 2015-08-28 | 2015-11-25 | 枣庄泰德机械有限公司 | Single pushrod adjuster assembly for clutch structure combining one-way bearing component and planar bearing component |
| CN107152468A (en) * | 2017-06-12 | 2017-09-12 | 中国航发哈尔滨东安发动机有限公司 | A kind of slip clutch with overload protection |
| EP3534031A1 (en) * | 2018-02-28 | 2019-09-04 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | Adjuster device for a disc brake |
| US10738836B2 (en) | 2016-11-30 | 2020-08-11 | Saint-Gobain Performance Plastics Rencol Limited | Adjustable torque assembly |
-
2013
- 2013-12-16 CN CN201320826951.5U patent/CN203655982U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629279A (en) * | 2013-12-16 | 2014-03-12 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gap adjusting mechanism for air pressure disc brake |
| CN103629279B (en) * | 2013-12-16 | 2017-02-15 | 中车戚墅堰机车车辆工艺研究所有限公司 | Gap adjusting mechanism for air pressure disc brake |
| CN104455119A (en) * | 2014-12-17 | 2015-03-25 | 南车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjuster |
| CN105090296A (en) * | 2015-08-28 | 2015-11-25 | 枣庄泰德机械有限公司 | Single pushrod adjuster assembly for clutch structure combining one-way bearing component and planar bearing component |
| US10738836B2 (en) | 2016-11-30 | 2020-08-11 | Saint-Gobain Performance Plastics Rencol Limited | Adjustable torque assembly |
| CN107152468A (en) * | 2017-06-12 | 2017-09-12 | 中国航发哈尔滨东安发动机有限公司 | A kind of slip clutch with overload protection |
| EP3534031A1 (en) * | 2018-02-28 | 2019-09-04 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | Adjuster device for a disc brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20161216 |