CN100371620C - Disk brake slack self-adjusting mechanism - Google Patents
Disk brake slack self-adjusting mechanism Download PDFInfo
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- CN100371620C CN100371620C CNB2005100505971A CN200510050597A CN100371620C CN 100371620 C CN100371620 C CN 100371620C CN B2005100505971 A CNB2005100505971 A CN B2005100505971A CN 200510050597 A CN200510050597 A CN 200510050597A CN 100371620 C CN100371620 C CN 100371620C
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Abstract
The present invention provides a clearance self-adjusting mechanism for a disk brake, which relates to a brake for vehicles. The present invention solves the problem of short service life and inaccurate clearance adjustment of the existing disk brake. In the clearance self-adjusting mechanism for a disk brake, the brake comprises a cam level, a shifting fork connected with the cam level and an adjusting sleeve, wherein the adjusting sleeve is provided with a gap, the shifting fork is inserted in the gap, a cylindrical one-way bearing is arranged in the adjusting sleeve and is connected with the adjusting sleeve in a tight fit way, an inner sleeve is arranged in the inner side of the one-way bearing, a screw pipe and screw rod linking mechanism is arranged in the inner sleeve, the upper end of the screw pipe and screw rod linking mechanism is provided with a clutch cover, the lower end of the screw pipe and screw rod linking mechanism is connected with a pushing plate, a friction disc overload clutch is arranged between the clutch cover and the inner sleeve, a pre-tightening spring is sheathed outside the adjusting sleeve, and a thrust bearing is arranged between the pre-tightening spring and the friction disc overload clutch. The clearance self-adjusting mechanism for a disk brake has the advantages of long service life and accurate clearance adjustment.
Description
Technical field
The present invention relates to a kind of break that is used on the automobile, relate in particular to a kind of clearance self-regulating mechanism with air pressure or hydraulic operated disk type braker.
Background technique
The break pattern that is applied at present on visitor, the freight car wheel mainly comprises: drum brake and disk type braker.With gas, hydraulic pressure as the disk type braker of power have compact structure, thermal diffusivity good, brake advantage stably, when braking, brake slipper is pressed to brake disc from both sides under the effect of brake system, and the brake disc locking of rotation the most at last, to reach the purpose to automobile brake.And drum brake is now progressively replaced by disk type braker because of its instability in use.
Disk type braker is in braking process, and its friction plate can wear and tear, and causes its brake clearance to become big, can directly influence the braking effect of automobile.Therefore, on disk type braker, just need add clearance self-regulating mechanism, become big phenomenon with the gap of eliminating between brake disc and the friction plate.
The self-adjustment structure of existing disk type braker mostly adopts torsion spring and adjusts cover the gap between friction plate and the brake disc is adjusted automatically.As everyone knows, automobile needs to carry out frequent braking in the process of travelling, to satisfy safe driving.Torsion spring is adjusted power unit as the automatic backlash of a frequent movement, in the using process of reality, the fatigability metaboly can occur, even can produce and fracture, and this can cause the malfunctioning of motor vehicle braking system, thereby has influenced the safety of vehicle driving.In addition, adopt this clearance self-regulating mechanism, the accuracy of its adjusting play depends on the torsion spring accuracy of manufacturing again, otherwise can not guarantee the working life of brake disc very effectively.
Summary of the invention
Not high for overcoming existing disk brake clearance self-regulating mechanism to the gap accuracy of adjusting because of the wearing and tearing of brake slipper, in use cause the malfunctioning of whole break easily, have influence on the defective of the brake safe of driving, the technical issues that need to address of the present invention are: the disk brake clearance self-regulating mechanism that a kind of new structure is provided, itself high life, accurate to the gap adjustment, the supporting sensitivity that on break, can not influence break, brake disc can effectively be guaranteed working life, compact structure, and be convenient to maintenance and maintenance.
For solveing the technical problem, the technical solution used in the present invention: a kind of disk brake clearance self-regulating mechanism, described break comprises cam lever, be connected the shift fork on the cam lever, adjust cover, described adjustment puts and is provided with breach, described shift fork is inserted in the described breach, it is characterized in that, be provided with a unilateral bearing cylindraceous in the described adjustment cover, described unilateral bearing connects for drive fit with the adjustment cover, in the inboard of unilateral bearing interior cover is housed, in interior cover, be provided with screwed pipe screw rod linking mechanism, the upper end of described screwed pipe screw rod linking mechanism is provided with clutch cover, and the lower end is connected with push pedal, is provided with the friction disk type overload clutch between clutch cover and interior cover, outside adjusting cover, be with preloading spring, be provided with thrust-bearing between described preloading spring and the friction disk type overload clutch.
The visitor, when lorry dispatches from the factory, the gap between brake slipper and the brake disc is by pre-set, brake disc is braked piece brake fully after, shift fork is in the breach scope of adjusting cover and moves.But when between brake slipper and the brake disc because of take place frictional loss make gap between brake slipper and the brake disc become big after, during braking brake slipper moved need behind the predefined gap to continue to brake disc against the time, shift fork will be exchanged the whole series and stir, adjusting cover drive unilateral bearing rotates together, and cover, overload clutch rotate together in driving by unilateral bearing, moment of torsion is passed to clutch cover, and then drive the rotation of screwed pipe screw rod linking mechanism.Because of screwed pipe screw rod linking mechanism lower end is connected in the push pedal, screwed pipe screw rod linking mechanism axial dimension when rotated can become greatly, thereby the brake slipper that is connected with push pedal is moved towards brake disc.When the complete roof pressure of brake slipper behind brake disc, screwed pipe screw rod linking mechanism axially can not be elongated, screwed pipe screw rod linking mechanism inside can not take place to rotate in a circumferential direction relatively, just makes clutch cover circumferentially static with respect to interior cover yet.At this moment, interior cover still can obtain moment of torsion from unilateral bearing, skidding will take place in inside in overload clutch, put the moment of torsion that is obtained with in eliminating, improved the travelling comfort the when vehicle driver brakes, and can consume braking reaction force and some frictional resistance squares that braking system inside is produced, avoid concentrating the destruction that is produced, the working life of having improved motor vehicle braking system because of excessive stresses.
And turn back in the initial position process at brake slipper, shift fork is stirred and is adjusted cover, adjusts the cover counterrotating, and drives the unilateral bearing counterrotating.At this moment, overrunning clutch and interior cover are in separated state, overrunning clutch dallies with respect to interior cover, thereby screwed pipe screw rod linking mechanism just can not obtain reactive torque, the axial dimension of screwed pipe screw rod linking mechanism still remains on the state after the elongation, therefore because of changing, gap that frictional loss took place obtained compensation between brake slipper and the brake disc, guaranteed that the gap between brake disc and the both sides brake slipper remains on the predefined size, guaranteed the working life of brake disc effectively, guaranteed the sensitivity of break in braking process, guaranteed the safety of driving, and compact structure, long service life, easy to maintenance, adjustment to the gap is accurate.
Above-mentioned friction disk type overload clutch is made of some interior friction plate that puts in circumferentially being fixed on and the some outside friction discs that circumferentially are fixed on the clutch cover, and outside friction disc is alternate with interior friction plate to be superimposed.
Above-mentioned screwed pipe screw rod linking mechanism comprises screwed pipe that the upper end is connected mutually with clutch cover and by being threaded in the screw rod in the screwed pipe, described interior being enclosed within on the screwed pipe, and described screw rod lower end links to each other with push pedal.
Be provided with a cavity in the upper end of screwed pipe, also be provided with a knob that links with screwed pipe in the upper end of screwed pipe.After brake slipper is worn down to thickness limit, need change brake slipper, can be on knob apply Hui Zhengli, make the screwed pipe counterrotating greater than the friction disk type overload clutch with spanner, thereby make screw rod get back to initial position, brake slipper of being convenient to more renew or brake disc.
After this clearance self-regulating mechanism is assemblied on the break, described screwed pipe screw rod linking mechanism is two, it is located at the cam lever both sides symmetrically, link by driving gear between two screwed pipe screw rod linking mechanisms, synchronism when driving gear can guarantee the rotation of screwed pipe screw rod linking mechanism, screwed pipe screw rod linking mechanism is two, has improved the stability of brake slipper in braking process.
Therefore, beneficial effect of the present invention: after supporting, in use deformation can not take place, can increase the service life with break; Accurate to the gap adjustment, can not have influence on the sensitivity of break; Be provided with the friction disk type overload clutch, can improve the travelling comfort of driver when brake, guarantee that brake inside can be because of the braking reaction force causes the concentrated destruction that is produced of stress, brake disc can effectively be guaranteed working life, compact structure is convenient to maintenance and maintenance.
Description of drawings
Fig. 1 is the assembling schematic representation of disk brake clearance self-regulating mechanism of the present invention and each assembly of break.
Fig. 2 is the A-A sectional drawing along Fig. 1.
Fig. 3 is the shift fork and the structural representation of adjusting after cover assembles on the cam lever.
Fig. 4 is the structural representation of interior friction plate.
Fig. 5 is the structural representation of outside friction disc.
Among the figure, 1, the cam lever seat assembly; 2, interior semicircle bearing; 3, cam lever; 4, outer semicircle bearing; 5, end cap assembly; 6, push pedal; 7, knob; 8, clutch cover; 9, friction disk type overload clutch; 10, thrust-bearing; 11, interior cover; 12, unilateral bearing; 13, adjust cover; 14, preloading spring; 15, screwed pipe; 16, screw rod; 17, driving gear; 18, shift fork; 19, be subjected to the arm of force; 20, breach; 21, interior friction plate; 22, internal tooth; 23, outside friction disc; 24, external tooth; 25, cam lever carriage.
Embodiment
In conjunction with Fig. 1 and Fig. 2 as can be seen, disk type braker mainly comprises cam lever seat assembly 1, cam lever carriage 25, end cap assembly 5, and wherein end cap assembly 5 links with cam lever carriage 25.Between cam lever seat assembly 1 and cam lever carriage 25, be provided with eccentric cam lever 3, semicircle bearing 2 in being provided with between cam lever 3 and the cam lever seat assembly 1, be provided with outer semicircle bearing 4 between cam lever 3 and the cam lever carriage 25, the outside of cam lever 3 has one and is subjected to the arm of force 19, it accepts extraneous to impel cam lever 3 towards the interior deflector between cam lever seat assembly 1 and the cam lever carriage 25 after pressing down power, because it is eccentric the setting, cam lever 3 can impel the direction operation of cam lever carriage 25 towards brake disc in rotating process.
As can be seen, disk brake clearance self-regulating mechanism of the present invention is arranged on the side of cam lever carriage 25 in Fig. 1, itself and cam lever carriage 25 Spielpassung, and can move towards the brake disc direction together along with cam lever carriage 25.The structure of disk brake clearance self-regulating mechanism comprises: adjust cover 13, unilateral bearing cylindraceous 12, friction disk type overload clutch 9, clutch cover 8, screwed pipe screw rod linking mechanism.Wherein adjust cover 13 and unilateral bearing 12 for drive fit connects, interior cover 11 is placed in the unilateral bearing 12, and should interiorly overlap 11 and screwed pipe screw rod linking mechanism be Spielpassung.Clutch cover 8 is connected the upper end portion of screwed pipe screw rod linking mechanism, and friction disk type overload clutch 9 is located between clutch cover 8 and the interior cover 11.Be provided with a collar flange on adjustment cover 13, be provided with preloading spring 14 between this flange and friction disk type overload clutch 9, the elastic force of this preloading spring 14 can act on the friction disk type overload clutch 9.
Above-mentioned friction disk type overload clutch 9 constitutes outside friction disc 23 and interior friction plate 21 alternate being superimposed by some interior friction plate 21 on the cover 11 in circumferentially being fixed on and the some outside friction discs 23 that circumferentially are fixed on the clutch cover 8.Friction disk type overload clutch 9 can pass to clutch cover 8 to the moment of torsion that obtains from interior cover 11 effectively like this, and then passes to screwed pipe screw rod linking mechanism.By Fig. 4, Fig. 5 as can be seen, inside and outside friction plate 21,23 is substantially circular, wherein has internal tooth 22 on the inner peripheral surface of interior friction plate 21, overlaps on 11 in it is enclosed within, in order to match with interior friction plate 21, the structure in order to friction plate in the socket 21 on the interior cover 11 is a spline structure; And having external tooth 24 on the outer circumferential face of outside friction disc 23, clutch cover 8 inner peripheral surfaces are provided with in order to accept the groove of described external tooth 24.Like this, inside and outside friction plate 21,23 can maintain a fixed in the course of the work.Certainly, the inner ring of interior friction plate 21 also can be a polygonal, and the outer of outside friction disc 23 also can be a polygonal, and the structure of the corresponding position of interior cover 11 with matching and clutch cover 8 matches with it.In order to accept the pretightening force of preloading spring 14 better, between interior friction plate 21 and the screwed pipe screw mechanism, be Spielpassung between outside friction disc 23 and the clutch cover 8.Generally speaking, inside and outside friction plate 21,23 is a multi-disc, in the present embodiment, inside and outside friction plate 21,23 is respectively three, can contact for face between the two, also can overlap mutually as shown in fig. 1, no matter adopt which kind of way of contact, needed power when frictional force between the two should be redefined under the effect of preloading spring 14 and relatively rotate greater than screwed pipe screw rod linking mechanism.
In order to prevent that cam lever 3 is when resetting, adjust cover 13 meeting counterrotatings, between preloading spring 14 and friction disk type overload clutch 9, can be provided with a thrust-bearing 10, thrust-bearing 10 is because of its good sliding that has, can avoid when adjusting cover 13 counterrotatings and drive the backward rotation of friction disk type overload clutch 9, make the brake slipper and the gap between the brake disc that have been compensated keep stable.
As seen from Figure 1, aforesaid screwed pipe screw rod linking mechanism is made up of screwed pipe 15 that is located at upside and the screw rod 16 that is threaded in the screwed pipe 15, and screwed pipe 15 is stepped, and the interior cover 11 in unilateral bearing 12 is enclosed within the top of screwed pipe 15 with gap.The lower end of screw rod 16 is connected in the push pedal 6.Be provided with a cavity in the upper end of screwed pipe 15, the knob 7 that is being connected in this cavity, this knob 7 is an interaction relation with screwed pipe 15.Can apply a Hui Zhengli to knob 7 by spanner, can brake slipper be resetted, make things convenient for replacing brake slipper or brake disc greater than friction disk type overload clutch 9 pretightening forces.Really, screwed pipe screw rod linking mechanism also can be that screw rod 16 is located at upside, and screwed pipe 15 is threaded on the downside of screw rod 16, and the lower end of screwed pipe 15 is connected in the push pedal 6.
In order to guarantee brake slipper and brake disc stability in contact in braking process, the bilateral symmetry of cam lever carriage 25 overhead cam levers 3 be provided with two screwed pipe screw rod linking mechanisms, two screwed pipe screw rod linking mechanisms link together by driving gear 17, by among Fig. 1 as can be seen, this driving gear 17 has three, has one respectively on two screwed pipe screw rod linking mechanisms, Spielpassung has one on cam lever carriage 25, three driving gears 17 are meshing with each other, and have guaranteed the synchronism and the same tropism of screwed pipe screw rod linking mechanism rotation by the transmission of driving gear 17.
In conjunction with Fig. 1 and Fig. 3, to adjust cover 13 and be provided with a breach 20, cam lever 3 is provided with a column shift fork 18, and described shift fork 18 1 ends are plugged on this and lack in 20.When actual design, scarce 20 circumferential size has requirement, and when new break was positioned at initial position, shift fork 18 contacted with a side of breach 20, does not have active force or active force less between the two.When on the cam lever 3 be subjected to the arm of force 19 to receive the power that comes from brake system after, the ends that shift fork 18 is plugged in the breach 20 move in breach 20.When the brake slipper locking was on brake disc, shift fork 18 did not just contact with the another side that lacks 20 mouthfuls, and the requirement of breach 20 circumferential size can be determined fully in practical design and experimentation.
Claims (6)
1. disk brake clearance self-regulating mechanism, described break comprises cam lever (3), be connected the shift fork (18) on the cam lever (3), adjust cover (13), described adjustment cover (13) is provided with breach (20), described shift fork (18) is inserted in the described breach (20), it is characterized in that, be provided with a unilateral bearing cylindraceous (12) in the described adjustment cover (13), described unilateral bearing (12) connects for drive fit with adjustment cover (13), in the inboard of unilateral bearing (12) interior cover (11) is housed, in interior cover (11), be provided with screwed pipe screw rod linking mechanism, the upper end of described screwed pipe screw rod linking mechanism is provided with clutch cover (8), the lower end is connected with push pedal (6), between clutch cover (8) and interior cover (11), be provided with friction disk type overload clutch (9), outside adjusting cover (13), be with preloading spring (14), be provided with thrust-bearing (10) between described preloading spring (14) and the friction disk type overload clutch (9).
2. disk brake clearance self-regulating mechanism according to claim 1, it is characterized in that, described friction disk type overload clutch (9) constitutes outside friction disc (23) and alternate being superimposed of interior friction plate (21) by the some outside friction discs (23) that circumferentially are fixed on the some interior friction plate (21) on the interior cover (11) and circumferentially be fixed on the clutch cover (8).
3. disk brake clearance self-regulating mechanism according to claim 1 and 2, it is characterized in that, described screwed pipe screw rod linking mechanism comprises upper end and the screwed pipe (15) that is connected mutually of clutch cover (8) and by being threaded in the screw rod (16) in the screwed pipe, cover (11) is enclosed within on the screwed pipe (15) in described, and described screw rod (16) lower end links to each other with push pedal (6).
4. disk brake clearance self-regulating mechanism according to claim 3 is characterized in that, the upper end of described screwed pipe (15) is provided with a cavity, also is provided with a knob (7) that links with screwed pipe (15) in the upper end of screwed pipe (15).
5. disk brake clearance self-regulating mechanism according to claim 1 and 2, it is characterized in that, described screwed pipe screw rod linking mechanism is two, and it is located at cam lever (3) both sides symmetrically, links by driving gear (17) between two screwed pipe screw rod linking mechanisms.
6. disk brake clearance self-regulating mechanism according to claim 3, it is characterized in that, described screwed pipe screw rod linking mechanism is two, and it is located at cam lever (3) both sides symmetrically, links by driving gear (17) between two screwed pipe screw rod linking mechanisms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100505971A CN100371620C (en) | 2005-07-06 | 2005-07-06 | Disk brake slack self-adjusting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100505971A CN100371620C (en) | 2005-07-06 | 2005-07-06 | Disk brake slack self-adjusting mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1710301A CN1710301A (en) | 2005-12-21 |
| CN100371620C true CN100371620C (en) | 2008-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100505971A Active CN100371620C (en) | 2005-07-06 | 2005-07-06 | Disk brake slack self-adjusting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100371620C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10975927B2 (en) | 2018-08-17 | 2021-04-13 | Otis Elevator Company | Brake device for elevator and an elevator system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384191A (en) * | 2011-07-06 | 2012-03-21 | 隆中控股集团有限公司 | Regulator of clearance self-regulating mechanism in automobile disc brake |
| DE102015117252A1 (en) * | 2015-10-09 | 2017-04-13 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Electric wear adjusting device of a disc brake, a corresponding disc brake and method for Lüftspielmessen, -Joint and wear measurement |
| CN108626272A (en) * | 2018-07-16 | 2018-10-09 | 浙江国昌机械有限公司 | Air-pressure disc type brake clamps assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4721190A (en) * | 1979-11-20 | 1988-01-26 | Itt Industries, Inc. | Mechanical actuating device for spot-type disc brakes |
| US5076401A (en) * | 1990-07-27 | 1991-12-31 | Westinghouse Air Brake Company | Spring-applied, hydraulically released brake actuator having positive clearance slack adjuster mechanism |
| CN2440970Y (en) * | 2000-08-07 | 2001-08-01 | 朱清峰 | Automatic brake gap regulator |
| CN2611679Y (en) * | 2003-05-07 | 2004-04-14 | 陈利祥 | Auto regulation arm for brake gap |
| CN2864224Y (en) * | 2005-07-06 | 2007-01-31 | 浙江隆中机械制造有限公司 | Clearance self-regulating mechanism for disk brake |
-
2005
- 2005-07-06 CN CNB2005100505971A patent/CN100371620C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4721190A (en) * | 1979-11-20 | 1988-01-26 | Itt Industries, Inc. | Mechanical actuating device for spot-type disc brakes |
| US5076401A (en) * | 1990-07-27 | 1991-12-31 | Westinghouse Air Brake Company | Spring-applied, hydraulically released brake actuator having positive clearance slack adjuster mechanism |
| CN2440970Y (en) * | 2000-08-07 | 2001-08-01 | 朱清峰 | Automatic brake gap regulator |
| CN2611679Y (en) * | 2003-05-07 | 2004-04-14 | 陈利祥 | Auto regulation arm for brake gap |
| CN2864224Y (en) * | 2005-07-06 | 2007-01-31 | 浙江隆中机械制造有限公司 | Clearance self-regulating mechanism for disk brake |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10975927B2 (en) | 2018-08-17 | 2021-04-13 | Otis Elevator Company | Brake device for elevator and an elevator system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1710301A (en) | 2005-12-21 |
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Address after: 317600 ridge foot of Yucheng street in Yuhuan, Zhejiang Patentee after: Longzhong Holdings Group Limited by Share Ltd Address before: 317600, Zhejiang province Yuhuan County Pearl River town Chengguan foot Ling Village Patentee before: Longzhong Holding Group Co., Ltd. |