CN2470607Y - Braking-gap automatic compensation mechanism of cam type brake - Google Patents
Braking-gap automatic compensation mechanism of cam type brake Download PDFInfo
- Publication number
- CN2470607Y CN2470607Y CN 01220877 CN01220877U CN2470607Y CN 2470607 Y CN2470607 Y CN 2470607Y CN 01220877 CN01220877 CN 01220877 CN 01220877 U CN01220877 U CN 01220877U CN 2470607 Y CN2470607 Y CN 2470607Y
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- CN
- China
- Prior art keywords
- gear
- worm
- brake
- compensation mechanism
- braking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
Disclosed is an automatic brake-clearance compensating mechanism which comprises a clutch spring 6, a worm shaft 5, a retaining spring 8, a worm wheel 9, a rack 1, a gear 2 and a body 10. A worm gear assembly consisting of the worm shaft 5, the clutch spring 6, the gear 2 and a gear retainer ring 4 is arranged in the body 10. The worm shaft 5 and the worm wheel 9, the gear 2 and the rack 1 respectively form a kinematic pair. The worm wheel connected with a camshaft is driven to rotate by a double-level one-way clutch, and then a cam is driven to achieve a one-way angular displacement and thereby achieve the automatic brake-clearance compensating function. No additional support is needed in the installation process of the utility model which can be installed directly in the existing automobile; therefore the utility model has stronger interchangeability and stronger environmental suitability, is simple for installation and reliable for application.
Description
The utility model relates to a kind of brake clearance compensation mechanism that is used for the vehicle cam type brake.
In existing automobile brake technology, extensively adopt the S-cam break, comprise structures such as two globoid cams and involute cam.In assembly process, the worm gear spline of braking adjusting arm is mounted on the external splines with the cam one, adjust the arm worm shaft and adjust the braking adjusting arm corner thereby rotate, the connecting thread fork is linked to each other with air chamber push rod screw thread with braking adjusting arm.When producing braking, the brake chamber push rod produces motion under compressed-air actuated effect, promoting braking adjusting arm is that rotate at the center around camshaft, thereby make cam produce relative angular displacement, being reflected on the brake shoe dimension then is a cam lift value because of cam rotation formation, produce friction thereby brake shoe is promptly contacted with brake drum, realize the braking of automobile.In existing braking technology, brake shoe and gap between the brake drum are by driving or the maintenance man carries out the adjustment of brake clearance by rotating the worm shaft that cooperates with worm gear when stopping, belonging to interim manual adjustment.This interim the adjustment is difficult to the brake clearance and the braking ability that guarantee that vehicle is constant relatively in the process of moving.
Under the normal condition, in the vehicle traveling process, must leave the gap between brake shoe and brake drum and can not produce friction, otherwise can increase the running resistance of automobile, brake shoe and brake drum locking phenomenon more can not occur and take place.
Above-mentioned defective at the prior art existence, the utility model patent provides a kind of cam type brake brake clearance compensation mechanism, its objective is, a kind of brake clearance compensation mechanism after improving is being provided on original working principle basis, is having advantages such as simple in structure, that technology capability good, low cost of manufacture, reliable operation, adaptability are good.
The utility model patent can be illustrated in conjunction with the accompanying drawings:
Accompanying drawing 1 is the assembly figure of cam type brake brake clearance compensation mechanism;
Accompanying drawing 2 is the side view of cam type brake brake clearance compensation mechanism;
Accompanying drawing 3 is the exploded view of the gear on worm assembly part of cam type brake brake clearance compensation mechanism;
Best enforcement as shown in drawings of the present utility model is made up of tooth bar 1, gear 2, wavy spring 3, gear ring washer 4, worm shaft 5, clutch spring 6, supporting base 7, stopper spring 8, worm gear 9, body 10, clevis 11 etc.The gear on worm assembly that worm shaft 5, clutch spring 6, gear 2, gear ring washer 4 constitute is installed in the body 10, wherein, worm gear 9 and worm shaft 5, tooth bar 1 forms kinematic pair mutually with gear 2.And clutch spring 6, gear 2 and gear back-up ring 4 are sleeved on the worm-wheel shaft 5;
Accompanying drawing 1 is break braking relaxation state.In actual use, internal spline cam (because of automobile S type cam brake belongs to prior art, so not expression in the accompanying drawings) the axle external splines 12 of this mechanism worm gear 9 is continuous, and air chamber push rod 13 links to each other with clevis 11.Promptly 1., eliminate the normal clearance between brake shoe and the brake drum in the whole process of automobile brake, this motion of mechanism is made up of three parts:; 2., when having excessive gaps or brake shoe wearing and tearing between the hoof drum, carry out the instant compensation of excessive gaps; 3., when braking takes place, brake shoe contact with brake drum, clearance automatic compensation mechanism generation resiliently deformable and make the adjustment function temporarily lose usefulness, thereby guaranteed to have relative constant gap between brake shoe and the brake drum.
During automobile brake, brake chamber promotes push rod 13 and clevis 11 forward under compressed-air actuated effect, and body 10 is made circular movement around worm gear 9 centers, produce an angular displacement, at this moment, do not produce relative angular displacement between body 10 and the worm gear 9, promptly do not relatively rotate.Tooth bar 1 is different with the housing angular displacement with the angular displacement that worm gear 9 centers exist side-play amount to produce because of it, the connection of clevis simultaneously forces tooth bar 1 to make the compound motion of straight line and circular arc, cause tooth bar 1 along the upwards pulling of its hole direction, until the normal clearance of eliminating between brake shoe and the brake drum; Push rod 13 and clevis 11 move under the effect of air chamber, if exist excessive gaps between brake shoe and the brake drum this moment, stopper spring 8 lockings, clutch spring 6 screws, hold gear 2 and worm shaft 5 tightly, the rotation drive worm shaft 5 of gear 2 reaches worm gear 9 rotations with its engagement, and worm gear 9 will be relative to making the compensation adjustment of cam rotation realization to excessive gaps with rotating of body, and this process realizes that promptly this mechanism compensates automatically to the cam type brake brake clearance.If do not exist excessive gaps between brake shoe and the brake drum this moment, be that its gap is when being in the normal range (NR), the motion that air chamber push rod 13 and clevis 11 continue makes automobile produce braking, this moment, the reaction force of braking made from skidding with spring 6, gear 2 breaks away from worm shaft 5, the motion of gear 2 can't drive worm shaft 5 and with worm gear 9 motions of its engagement, worm gear 9 is relative static with body 10, resiliently deformable takes place to brake in the brake clearance compensation mechanism.When resiliently deformable took place, the adjustment function of clearance automatic compensation mechanism lost usefulness, and promptly when this stage, any motion of clearance automatic compensation mechanism does not all have influence to brake clearance.She Ji aim is to prevent the too small generation until situations such as lockings of brake clearance like this.
Loosen in the process in braking, camshaft drives the automatic control tegulatingdevice return under the effect of break return spring pulling force, this hour rack 1 moves downward along rack bore, drive with its meshed gears 2 and rotate, in the returning movement process of gear 2, clutch spring 6 loosens, stopper spring 8 lockings, worm shaft 5 is not rotated because of gear 2 motions, adjusted brake clearance is preserved.After braking generation repeatedly, original excessive gaps can be adjusted to the normal clearance that expection is set.
Adopt clearance automatic compensation mechanism in vehicle traveling process, to measure and to compensate brake clearance automatically, make automobile have constant brake clearance and braking ability, thereby improve the driving safety of automobile.And this compensation can continue to carry out, and gives full play to the Braking efficiency of automobile, reduces compressed-air actuated consumption, makes automobilism more economical, safer.And the utility model patent does not need the frame of increasing expenditure in addition in installation process, can this mechanism be installed on present automobile directly, has stronger interchangeability; And install simply, use reliable; Has stronger environmental adaptability.
Claims (4)
1, a kind of cam type brake brake clearance compensation mechanism, form by clutch spring 6, worm shaft 5, stopper spring 8, worm gear 9, tooth bar 1, gear 2, wavy spring 3, body 10, supporting base 7, clevis 11 etc., it is characterized in that, the gear on worm assembly that worm shaft 5, clutch spring 6, gear 2 and gear back-up ring 4 constitute is installed in the body 10, and worm shaft 5 forms kinematic pair with worm gear 9, tooth bar 1 mutually with gear 2.
2, as cam type brake brake clearance compensation mechanism as described in claims 1, it is characterized in that clutch spring 6, gear 2 and gear back-up ring 4 are sleeved on the worm shaft 5.
As cam type brake brake clearance compensation mechanism as described in claims 1, it is characterized in that 3, tooth bar 1 has side-play amount with the center of worm gear 9.
As cam type brake brake clearance compensation mechanism as described in claims 1, it is characterized in that 4, clevis 11 can promote body 10 and rotate around the center of worm gear 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01220877 CN2470607Y (en) | 2001-04-12 | 2001-04-12 | Braking-gap automatic compensation mechanism of cam type brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01220877 CN2470607Y (en) | 2001-04-12 | 2001-04-12 | Braking-gap automatic compensation mechanism of cam type brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2470607Y true CN2470607Y (en) | 2002-01-09 |
Family
ID=33638313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01220877 Expired - Fee Related CN2470607Y (en) | 2001-04-12 | 2001-04-12 | Braking-gap automatic compensation mechanism of cam type brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2470607Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667437B (en) * | 2010-01-22 | 2015-03-11 | 日锻汽门株式会社 | Method of testing air-tightness of hermetically sealed lash adjuster |
| CN106246770A (en) * | 2016-09-13 | 2016-12-21 | 广州市润浩汽车配件有限公司 | Braking gap is automatically adjusted arm |
| CN111730600A (en) * | 2020-07-13 | 2020-10-02 | 马鞍山思卡瑞自动化科技有限公司 | Kinematic pair joint clearance eliminating mechanism of feeding robot and implementation method thereof |
-
2001
- 2001-04-12 CN CN 01220877 patent/CN2470607Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667437B (en) * | 2010-01-22 | 2015-03-11 | 日锻汽门株式会社 | Method of testing air-tightness of hermetically sealed lash adjuster |
| CN106246770A (en) * | 2016-09-13 | 2016-12-21 | 广州市润浩汽车配件有限公司 | Braking gap is automatically adjusted arm |
| CN106246770B (en) * | 2016-09-13 | 2019-08-02 | 广州市润浩汽车配件有限公司 | Braking gap automatically adjusts arm |
| CN111730600A (en) * | 2020-07-13 | 2020-10-02 | 马鞍山思卡瑞自动化科技有限公司 | Kinematic pair joint clearance eliminating mechanism of feeding robot and implementation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020109 Termination date: 20100412 |