CN103629279B - Gap adjusting mechanism for air pressure disc brake - Google Patents
Gap adjusting mechanism for air pressure disc brake Download PDFInfo
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- CN103629279B CN103629279B CN201310686191.7A CN201310686191A CN103629279B CN 103629279 B CN103629279 B CN 103629279B CN 201310686191 A CN201310686191 A CN 201310686191A CN 103629279 B CN103629279 B CN 103629279B
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- flange
- ring
- adjustment axis
- needle bearing
- step shaft
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- 230000006870 function Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Braking Arrangements (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
The invention discloses a gap adjusting mechanism for an air pressure disc brake. The gap adjusting mechanism comprises a shifting fork, a flange, balls, an overload clutch, an adjusting shaft and a fixed disc, wherein the flange is provided with a step shaft and a flange disc; an inner hole of the shifting fork is matched with an outer ring of a unidirectional needle bearing; an inner ring of the unidirectional needle bearing is mounted on the step shaft of the flange; a plurality of first concave pits are formed in the lower end face of the flange disc of the flange; a plurality of second concave pits corresponding to the first concave pits are formed in the upper end face of a shell of the overload clutch; the balls are contained in containing cavities formed among the first concave pits and the corresponding second concave pits; spline grooves are formed in an inner wall of the shell of the overload clutch; spline teeth are formed in the periphery of a fixed wheel; the spline teeth are matched with the spline grooves; a tensioning spring is arranged between the fixed disc and the shifting fork; the flange is provided with a retainer ring; the retainer ring is baffled at one end of the unidirectional needle bearing and one end of the step shaft; a wear-resisting sheet is arranged between a lug boss of the adjusting shaft and the fixed disc. The gap adjusting mechanism for the air pressure disc brake is simple in structure and reliable in performance.
Description
Technical field
The present invention relates to a kind of disk brake of air-operated control, especially relate to a kind of gap adjusting mechanism.
Background technology
The disk brake of air-operated control be increasingly used in now urban public traffic vehicles, medium-to-high grade sightseeing bus,
In heavily loaded goods carrying vehicle.
The type disk brake is made up of floating caliper, bracket, brake block, brake disc.Wherein floating caliper is by making
Dynamic lever, hold down gag, back-moving spring, gap adjusting mechanism are constituted.The major function of gap adjusting mechanism is to compensate brake block
In the abrasion in braking procedure it is ensured that the air gap between brake block and brake disc is constant, it is on active service the stage in disk brake, gas
Gap value should be not dependent on the state of wear of brake block and polishing machine and keep constant.
Gap adjusting mechanism due to air-operated control disk brake can only make excessive gap between brake block and brake disc
Reduce, and the gap between brake block and brake disc can not be increased, therefore clearance adjustment mechanism should possess unidirectional regulatory function.And
In order to eliminate excessive brake force, gap adjusting mechanism must have torque overload defencive function, and overload protection function is typically
Realized by safety clutch.The gap adjusting mechanism unidirectional adjustment function of prior art mainly passes through screw twisted bullet
Come to realize, this structure proposes very high requirement to spring to the performance of helical torsional spring, and domestic material and technique are difficult to
Ensure stability and the reliability of unidirectional adjustment function.The overload protection function of the gap adjusting mechanism of prior art is by many
, come to realize, this structure is more complicated for slice clutch piece, high to material requirements, and then increased cost.
Content of the invention
Object of the present invention is to provide a kind of structure is simple, the gap adjustment of the air-pressure disc brake of dependable performance
Mechanism.
In order to achieve the above object, the technical scheme is that：A kind of gap adjusting mechanism of air-pressure disc brake,
Including shift fork, flange, ball, safety clutch, adjustment axis and fixed disk, described fixed disk and flange are sleeved on being rotatably assorted
In adjustment axis, described shift fork is enclosed within outside flange, and described safety clutch is located at the bottom of adjustment axis, described safety clutch bag
Include housing, spring and fast pulley, one end of spring and inner walls offset, and the other end is offseted with fast pulley, and fast pulley is fixed on
The bottom of adjustment axis, the periphery of described housing is provided with external splines, and described flange has Step Shaft and ring flange, Step Shaft upper,
Ring flange under, the cooperation of the outer ring of the endoporus of described shift fork and a unidirectional needle bearing, the inner ring of unidirectional needle bearing is arranged on
On the Step Shaft of flange, the lower surface of the ring flange of described flange has several the first pits, the shell of described safety clutch
The upper surface of body has several second pits corresponding with the first pit of flange, described ball be contained in the first pit and
The cavity volume being formed between corresponding second pit, the inwall of the housing of described safety clutch has spline, outside fast pulley
There is spline tooth, spline tooth is coordinated with spline, is provided with tensioning spring, described flange sets between described fixed disk and shift fork week
There is back-up ring, back-up ring keeps off between one end of one end of unidirectional needle bearing and Step Shaft, the boss of described adjustment axis and fixed disk
Wear plate is installed.
The lower end of described adjustment axis has flat gesture, and adjustment axis are riveted together by the endoporus of flat gesture and fast pulley.
The upper end of described Step Shaft has counterbore, and described back-up ring is the sleeve with flanging, the tuck portion of back-up ring with unidirectional
The upper end of needle bearing offsets, and counterbore base is stretched in the sleeve part of back-up ring.
After said structure, the present invention when gap is excessive between brake block and brake disc, in on-position, actuates machine
Structure brake lever actuates the fixing contact pin of shift fork, drives shift fork rotation；Due to the effect of unidirectional needle bearing, shift fork and flange are locked
Extremely, flange rotates under the drive of shift fork；When rotation torque does not have excessive, flange drives clutch housing together by ball
Rotation；The screwed pipe rotation rotarily driving disk brake of clutch housing, thus eliminate gap.After braking revocation, promote
Motivation body plan is moved lever drives shift fork and is reversely rotated, and now unidirectional needle bearing allows to relatively rotate between shift fork and flange, because
This flange does not rotate, and clutch housing does not have reverse rotation, and the therefore original gap crossing wide arc gap is eliminated.The present invention adopts
Instead of the helical torsional spring of prior art with unidirectional needle bearing, therefore, structure is simple, stability and reliability are high.
Brief description
The present invention is further detailed explanation for the embodiment being given below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of the gap adjusting mechanism of the air-pressure disc brake of the present invention；
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.
Specific embodiment
As shown in Fig. 1 ~ 4, a kind of gap adjusting mechanism of air-pressure disc brake, including shift fork 1, flange 3, ball 4, mistake
Carry off clutch 5, adjustment axis 7 and fixed disk 8, described fixed disk 8 and flange 3 are sleeved in adjustment axis 7 with being rotatably assorted, described group
Fork 1 is enclosed within outside flange 3, and described safety clutch 5 is located at the bottom of adjustment axis 7, described safety clutch 5 include housing 5-1,
Spring 5-2 and fast pulley 6, one end of spring 5-2 is offseted with housing 5-1 inwall, and the other end is offseted with fast pulley 6, and fast pulley 6 is solid
It is scheduled on the bottom of adjustment axis 7, the periphery of described housing 5-1 is provided with external splines 5-1-1, and described flange 3 has Step Shaft 3-1 and method
Blue disk 3-2, Step Shaft 3-1 upper, ring flange 3-2 under, the outer ring of the endoporus of described shift fork 1 and a unidirectional needle bearing 2 is joined
Close, the inner ring of unidirectional needle bearing 2 is arranged on the Step Shaft 3-1 of flange 3, the lower end mask of the ring flange 3-2 of described flange 3
There is several first pits 3-2-1, the upper surface of the housing 5-1 of described safety clutch 5 has the first of several and flange 3
The second corresponding pit 5-1-2 of pit 3-2-1, described ball 4 is contained in the first pit 3-2-1 and corresponding second pit 5-
The cavity volume being formed between 1-2, the inwall of the housing 5-1 of described safety clutch 5 has spline 5-3, the periphery tool of fast pulley 6
There are spline tooth 6-1, spline tooth 6-1 and spline 5-3 to coordinate, between described fixed disk 8 and shift fork 1, be provided with tensioning spring 10, institute
State flange 3 and be provided with back-up ring 11, back-up ring 11 keeps off one end of one end in unidirectional needle bearing 2 and Step Shaft 3-1, described adjustment axis
Between 7 boss 7-1 and fixed disk 8, wear plate 9 is installed.
Described first pit 3-2-1, the second pit 5-1-2 and ball 4 quantity are equal, have a ball in each cavity volume
4.
As shown in Fig. 1,4, the lower end of described adjustment axis 7 has flat gesture 7-2, and adjustment axis 7 pass through flat gesture 7-2 and fast pulley 6
Endoporus 6-2 be riveted together.
As shown in figure 1, 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 tuck portion of back-up ring 11 is offseted with the upper end of unidirectional needle bearing 2, 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 present invention uses, in air-pressure disc brake normal brake application state, when brake block and braking
When air gap between disk exceedes setting air gap value, from the fixing contact pin 1-1 rotarily driving shift fork 1 of Disk Brake lever
Rotation, and then drive shift fork 1 to rotate；In on-position, unidirectional needle bearing 2 is in locking state, and list is passed through in the rotation of shift fork 1
Flange 3 is driven to rotate to needle bearing 2.
If the rotation torque coming from flange 3 transmission is not above the peak torque set by overload protective device, flange 3 will lead to
Crossing ball 4 drives safety clutch housing 5-1 to be rotated；There are inside clutch housing 5-1 some spline 5-3, fixing
The outer ring of wheel 6 has some spline tooth 6-1, coordinates transmitting torque, the endoporus of fast pulley 6 with the spline 5-3 of clutch housing 5
6-2 is riveted together with adjustment axis 7, and clutch housing 5-1 is rotated through spline 5-3, external splines 5-1-1, fast pulley 6
Endoporus 6-2 is delivered in adjustment axis 7, and adjustment axis 7 are synchronously rotated with clutch housing 5-1；Adjustment axis 7 and fixed disk 8 it
Between have antifriction piece 9 it is allowed to adjustment axis 7 rotate with respect to fixed disk 8.The outside of clutch housing 5-1 has external splines 5-1-1,
External splines 5-1-1 drives the screw rod of disk brake to be rotated, and the translating rotation of screw rod is axial displacement, eliminates brake block
Gap and brake disc between.
After gap when between brake block and brake disc is eliminated, brake block presses close to brake disc, then from shift fork 1 and flange
3 rotation torque can increase suddenly, when the peak torque set by moment of torsion exceedes overload protective device, all of ball 4 from
A pair of pit 3-2-1,5-1-2 move to adjacent another to pit 3-2-1,5-1-2, eliminate the rotation from flange 3 and turn round
Square, then clutch housing 5-1 will no longer rotate with flange 3 jointly.
During release of brake, between brake block and brake disc, produce air gap, when air gap just will exceed setting air gap, brake thick stick
Bar drives the fixing contact pin 1-1 opposite direction rotation of shift fork 1, and then drives the rotation of shift fork 1 opposite direction, now unidirectional needle bearing 2
It is in releasing orientation, flange 3 can not be followed shift fork 1 and be reversely rotated together, and clutch housing 5-1 also will not be rotated.Cause
The air gap that this is eliminated in on-position can't regenerate, thus serving the effect compensating gap.
Claims (2)
1. a kind of gap adjusting mechanism of air-pressure disc brake, including shift fork（1）, flange（3）, ball（4）, safety clutch
（5）, adjustment axis（7）And fixed disk（8）, described fixed disk（8）And flange（3）It is sleeved on adjustment axis with being rotatably assorted（7）On, institute
State shift fork（1）It is enclosed within flange（3）Outside, described safety clutch（5）Positioned at adjustment axis（7）Bottom, described safety clutch
（5）Including housing（5-1）, spring（5-2）And fast pulley（6）, spring（5-2）One end and housing（5-1）Inwall offsets, another
End and fast pulley（6）Offset, fast pulley（6）It is fixed on adjustment axis（7）Bottom, described housing（5-1）Periphery be provided with outer flower
Key（5-1-1）It is characterised in that：
A, described flange（3）There is Step Shaft（3-1）And ring flange（3-2）, Step Shaft（3-1）In upper, ring flange（3-2）?
Under,
B, described shift fork（1）Endoporus and a unidirectional needle bearing（2）Outer ring cooperation, unidirectional needle bearing（2）Inner ring peace
It is contained in flange（3）Step Shaft（3-1）On,
C, described flange（3）Ring flange（3-2）Lower surface there is several the first pits（3-2-1）, described overload clutch
Device（5）Housing（5-1）Upper surface there is several and flange（3）The first pit（3-2-1）The second corresponding pit
（5-1-2）, described ball（4）It is contained in the first pit（3-2-1）With corresponding second pit（5-1-2）Between formed appearance
Chamber,
D, described safety clutch（5）Housing（5-1）Inwall there is spline（5-3）, fast pulley（6）Periphery there is flower
Key teeth（6-1）, spline tooth（6-1）With spline（5-3）Cooperation,
E, described fixed disk（8）And shift fork（1）Between be provided with tensioning spring（10）,
F, described flange（3）It is provided with back-up ring（11）, back-up ring（11）Gear is in unidirectional needle bearing（2）One end and Step Shaft（3-
1）One end,
G, described adjustment axis（7）Boss（7-1）With fixed disk（8）Between wear plate is installed（9）,
H, described Step Shaft（3-1）Upper end there is counterbore（3-1-1）, described back-up ring（11）For the sleeve with flanging, back-up ring
（11）Tuck portion and unidirectional needle bearing（2）Upper end offset, back-up ring（11）Sleeve part stretch into counterbore（3-1-1）Bottom
Portion.
2. air-pressure disc brake according to claim 1 gap adjusting mechanism it is characterised in that：Described adjustment axis
（7）Lower end there is flat gesture（7-2）, adjustment axis（7）By flat gesture（7-2）With fast pulley（6）Endoporus（6-2）It is riveted on one
Rise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310686191.7A CN103629279B (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism for air pressure disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310686191.7A CN103629279B (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism for air pressure disc brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103629279A CN103629279A (en) | 2014-03-12 |
| CN103629279B true CN103629279B (en) | 2017-02-15 |
Family
ID=50210636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310686191.7A Active CN103629279B (en) | 2013-12-16 | 2013-12-16 | Gap adjusting mechanism for air pressure disc brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103629279B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455119B (en) * | 2014-12-17 | 2017-10-10 | 中车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjuster |
| CN104500623B (en) * | 2014-12-17 | 2017-02-22 | 南车戚墅堰机车车辆工艺研究所有限公司 | Clearance adjuster of pneumatic disc brake |
| EP3548225B1 (en) | 2016-11-30 | 2022-03-09 | Saint-Gobain Performance Plastics Rencol Limited | Adjustable torque assembly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781078Y (en) * | 2005-04-19 | 2006-05-17 | 万安集团有限公司 | Overload protection mechanism of pressure disk brake |
| CN102269231A (en) * | 2011-06-09 | 2011-12-07 | 段昌金 | Automatic regulator |
| CN202768690U (en) * | 2012-09-03 | 2013-03-06 | 枣庄泰德机械有限公司 | Air pressure disk type brake adjuster |
| CN203655982U (en) * | 2013-12-16 | 2014-06-18 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gap adjusting mechanism of air pressure disk brake |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043279U (en) * | 1988-07-20 | 1989-08-23 | 上海电机厂 | Thick sealant injecting device |
| DE102008036034A1 (en) * | 2008-08-01 | 2010-02-18 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Adjustment device for a disc brake |
| US20120193176A1 (en) * | 2011-01-31 | 2012-08-02 | Knowles Richard N | Brake System Comprising A Retractor |
-
2013
- 2013-12-16 CN CN201310686191.7A patent/CN103629279B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781078Y (en) * | 2005-04-19 | 2006-05-17 | 万安集团有限公司 | Overload protection mechanism of pressure disk brake |
| CN102269231A (en) * | 2011-06-09 | 2011-12-07 | 段昌金 | Automatic regulator |
| CN202768690U (en) * | 2012-09-03 | 2013-03-06 | 枣庄泰德机械有限公司 | Air pressure disk type brake adjuster |
| CN203655982U (en) * | 2013-12-16 | 2014-06-18 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gap adjusting mechanism of air pressure disk brake |
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| Publication number | Publication date |
|---|---|
| CN103629279A (en) | 2014-03-12 |
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Address after: 213011 Wuyi Road, Changzhou, Jiangsu, No. 258, No. Applicant after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 Wuyi Road, Qishuyan District, Jiangsu, China, No. 258, No. Applicant before: CSR QISHUYAN INSTITUTE Co.,Ltd. |
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Address after: 213011 No. 51 Wuyi Road, Qishuyan, Changzhou, Jiangsu, 258 Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Country or region after: China Address before: 213011 No. 51 Wuyi Road, Qishuyan, Changzhou, Jiangsu, 258 Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. Country or region before: China |
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