CN2143691Y - Automatic adjuster for braking gap of drum brake - Google Patents
Automatic adjuster for braking gap of drum brake Download PDFInfo
- Publication number
- CN2143691Y CN2143691Y CN 92214959 CN92214959U CN2143691Y CN 2143691 Y CN2143691 Y CN 2143691Y CN 92214959 CN92214959 CN 92214959 CN 92214959 U CN92214959 U CN 92214959U CN 2143691 Y CN2143691 Y CN 2143691Y
- Authority
- CN
- China
- Prior art keywords
- ratchet
- brake
- arm
- worm shaft
- adjusting
- 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
The utility model relates to an automatic adjuster for braking gap of drum brake, which is formed by that a braking gap adjusting arm 2 which is connected with a brake camshaft 1; an adjusting worm shaft 4 is meshed with an adjusting worm wheel 3; a one-way transmission mechanism 11 drives the worm shaft 4 one-way rotation. The utility model is characterized in that the one-way transmission mechanism 11 belongs to a ratchet wheel type one-way transmission mechanism, which is formed by that the radial directional (or axial directional) ratchet wheel type one-way transmission mechanism of the screw shaft of an original adjusting arm replaces an original multiple-piece type one-way clutch. The utility model has the advantages of simple structure, low cost and high reliability, being suitable for automatic adjustment of the braking gap of various drum brakes.
Description
The utility model relates to a kind of device of brake clearance of automatic adjusting drum brake.
Drum brake is in use because the wearing and tearing of two rubbing surfaces between friction plate and the brake drum, the initial brake clearance that mixes up on request therebetween can increase therefrom day by day, thereby cause the effective working stroke and the Braking efficiency of break to be affected, even jeopardize traffic safety.Therefore, must often adjust its gap width makes it to remain within the safety value.For preventing the leakage item or the error of friction plate excessive wear or adjustment operation, existing a kind of band brake is adjusted the drum brake brake clearance automatic regulator of arm, on traditional worm and gear adjustment arm, increased by a cover brake clearance automatic adjusting mechanism, but this automatic adjusting mechanism is adjusted the multidisc overrunning clutch that worm shaft rotates by a unidirectional drive, and the gear and a upper end that can drive this overrunning clutch is formed with gear engagement, the tooth bar of lower end bend cutting in the support bracket fastened chute of not swinging with braking adjusting arm.The sliding distance of the elbow of tooth bar lower end in chute is relevant with the pivot angle of braking adjusting arm, when the braking primary clearance transfinites, the pivot angle of braking adjusting arm also transfinites thereupon, the excess sliding distance of lower end in chute of this tooth bar of being caused of transfiniting limit by the set chute width of reserving, force tooth bar excess not slide and the handsetting gear rotation, the rotating drive of gear is adjusted the arm worm shaft and is rotated and automatically restore to normal brake clearance when being implemented in brake off by the multidisc overrunning clutch.This brake clearance automatic adjusting mechanism that comprises the multidisc overrunning clutch, owing to its multidisc one-way clutch complex structure, very easily damage or inefficacy, thereby the automatic adjustment of the break brake clearance of this structure is very unreliable.
The purpose of this utility model provides a kind of brake clearance automatic regulating apparatus of simple in structure, good reliability.
The brake clearance automatic regulating apparatus of realization the purpose of this utility model comprises the brake clearance adjustment arm that is connected with brake camshaft, the Ratcheting one-way driving mechanism that is installed in adjustment arm worm shaft in the adjustment arm and that adjust the worm gear engagement and driving adjustment arm worm shaft one-way rotation, described Ratcheting one-way driving mechanism can by be arranged on the radially ratchet on the worm shaft, a ratchet and an end that is overlapped on the ratchet is connected with ratchet, the ratchet drive link that the other end is installed in the fixing limit sliding chutes is formed.The flank of tooth length of the gear teeth by suitably designing ratchet, the position of limit sliding chutes, make it when the situation lower swing of braking adjusting arm in the normal brake application gap, the ratchet drive link coasting distance in limit sliding chutes thereupon guarantees that ratchet only slides between one of ratchet is taken turns beginning, end of the flank of tooth, ratchet does not rotate together with adjusting the arm worm shaft, keeps the original interstice; When brake clearance transfinites, the pendulum angle of braking adjusting arm also transfinites thereupon, the ratchet also pivot angle when transfiniting falls into the next flank of tooth of ratchet, when the braking releasing resets, under the effect of limit sliding chutes, force single direction ratchet to be rotated, adjust the rotation of arm worm shaft thereby drive, realize the automatic adjustment of brake clearance.
Described Ratcheting one-way driving mechanism also can be designed to the type of belt drive of axial mesh ratchet gear, promptly constitute by the axial driven ratchet on the end face that is arranged on worm shaft, the axial driving ratchet that is meshed with this driven ratchet, with radially the ratchet ratchet structure is the same, when normal clearance, driving ratchet slides on one section flank of tooth with respect to driven ratchet, fall into the next flank of tooth when transfiniting, force driven ratchet to rotate when resetting and drive affixed with it adjustment arm worm shaft and rotate.
The utility model replaces multidisc overrunning clutch in original adjustment arm with common Ratcheting one-way transmission device, simplifies the structure, reduced manufacture cost and user cost, has also improved the reliability of whole controlling mechanism simultaneously.Can be used for the automatic adjustment of various drum brake brake clearances.
Below in conjunction with embodiment and accompanying drawing the utility model is described further.
Fig. 1 is a structural representation of the present utility model
Fig. 2 is that the B of Fig. 1 is to view
Fig. 3 is the brake clearance initial position schematic representation between ratchet and ratchet just often
Position view when Fig. 4 is the brake clearance braking between ratchet and ratchet just often
Fig. 5 is the brake clearance position view the during brake off between ratchet and ratchet just often
Position view during braking when Fig. 6 transfinites for brake clearance between ratchet and ratchet
Position view behind brake off return when Fig. 7 transfinites for brake clearance between ratchet and ratchet
Fig. 8 is embodiment's 2 an of the present utility model structural representation
Embodiment 1:
Fig. 1～2 have provided the structural representation of present embodiment.Wherein, the brake clearance adjustment arm 2 that is connected with brake camshaft 1, the adjustment arm worm shaft 4 with adjusting worm gear 3 engagements that is installed in the adjustment arm are all continued to use original structural type, drive the Ratcheting one-way driving mechanism of adjusting arm worm shaft one-way rotation, by being fixed in radially ratchet 5 on the worm shaft, being overlapped on a ratchet 6 on the ratchet 5 and an end and ratchet 6 and joining, the other end is formed by the ratchet drive link 9 that roller 7 is installed in the fixed limit chute 8 in the present embodiment.For guarantee that ratchet is overlapped on the ratchet flank of tooth when ratchet is swung with braking adjusting arm, one through hole 10 can be set on the braking adjusting arm shell to be enclosed within ratchet drive link 9 in this through hole, can drive the ratchet drive link when braking adjusting arm swings back and forth together swings, make the unlikely disengaging ratchet of ratchet, simultaneously, under the effect of limit sliding chutes 8, the ratchet drive link can be slided with respect to through hole 10, ratchet is slided on a certain flank of tooth of ratchet.Suitably the positional structure between limit sliding chutes 8, ratchet drive link 9 and the braking adjusting arm pivot angle of design concerns, make brake clearance just often, ratchet promptly slides on the sector CD section shown in Fig. 3～5 along with the normal pivot angle scope of braking adjusting arm slidably reciprocates on the sector of a certain tooth of ratchet; When brake clearance transfinites, the pivot angle of braking adjusting arm also transfinites, ratchet then slips over the D point and falls on the flank of tooth of next hook tooth under the drive of its pivot angle that transfinites, as Fig. 6, E place shown in Figure 7, during brake off, the ratchet drive link forces ratchet to rotate under the effect of limit sliding chutes, adjusts the rotation of arm worm screw thereby drive, and realizes the automatic adjustment of brake clearance.Behind the adjusting play, ratchet then with the normal pivot angle of braking adjusting arm at sector
Slide on the section, transfiniting up to the gap falls within next flank of tooth slip again.Ratchet and ratchet drive link be articulated and connected, and be provided with and turn round pressing spring 13 ratchet is pressed toward ratchet, can guarantee further that reliable overlap joint between ratchet and ratchet is with driving pawl.
Embodiment 2:
Present embodiment and embodiment's 1 structure are basic identical, and ratchet mechanism that different is adopts the axially ratchet type of belt drive of engagement, as shown in Figure 8, by be arranged on the driven ratchet of adjusting on arm worm shaft 4 end faces 14, the driving ratchet 15 that is engaged with constitutes.
Claims (3)
1, a kind of automatic regulating apparatus of drum brake brake clearance, comprise the brake clearance adjustment arm (2) that is connected with brake camshaft (1), be installed in and adjust the adjustment arm worm shaft (4) that is meshed with adjustment worm gear (3) in the arm (2) and drive the one-way driving mechanism (11) of adjusting arm worm shaft (4) one-way rotation, it is characterized in that described one-way driving mechanism (11) is the Ratcheting one-way driving mechanism.
2, brake clearance automatic regulating apparatus as claimed in claim 1, it is characterized in that described Ratcheting one-way driving mechanism (11) comprises is arranged on the radially ratchet of adjusting on the arm worm shaft (4) (5), is overlapped on that a ratchet (6) and an end on the ratchet (5) is connected with ratchet (6), the other end is installed in the ratchet drive link (9) in the fixed limit chute (8).
3, brake clearance automatic regulating apparatus as claimed in claim 1 is characterized in that described Ratcheting one-way driving mechanism also can be by being arranged on the axial driven ratchet of adjusting on arm worm shaft (4) end face (14), the axial driving ratchet (15) that is meshed with this driven ratchet (14) formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92214959 CN2143691Y (en) | 1992-07-17 | 1992-07-17 | Automatic adjuster for braking gap of drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92214959 CN2143691Y (en) | 1992-07-17 | 1992-07-17 | Automatic adjuster for braking gap of drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2143691Y true CN2143691Y (en) | 1993-10-13 |
Family
ID=33763962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92214959 Expired - Fee Related CN2143691Y (en) | 1992-07-17 | 1992-07-17 | Automatic adjuster for braking gap of drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2143691Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865225A (en) * | 2010-06-29 | 2010-10-20 | 浙江天元机电有限公司 | Automatic adjusting arm for automobile brake clearance |
| CN102022463A (en) * | 2009-09-15 | 2011-04-20 | 株式会社万都 | Apparatus and method of adjusting clearance of electronic brake |
| CN106112421A (en) * | 2016-06-16 | 2016-11-16 | 广西汽车集团有限公司 | A kind of rear brake excircle dimension on-line tuning method |
| CN114893517A (en) * | 2022-05-23 | 2022-08-12 | 伍仕明 | Simplified brake clearance automatic adjusting device and drum brake |
-
1992
- 1992-07-17 CN CN 92214959 patent/CN2143691Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022463A (en) * | 2009-09-15 | 2011-04-20 | 株式会社万都 | Apparatus and method of adjusting clearance of electronic brake |
| CN101865225A (en) * | 2010-06-29 | 2010-10-20 | 浙江天元机电有限公司 | Automatic adjusting arm for automobile brake clearance |
| CN101865225B (en) * | 2010-06-29 | 2012-08-22 | 浙江天元机电有限公司 | Automatic adjusting arm for automobile brake clearance |
| CN106112421A (en) * | 2016-06-16 | 2016-11-16 | 广西汽车集团有限公司 | A kind of rear brake excircle dimension on-line tuning method |
| CN114893517A (en) * | 2022-05-23 | 2022-08-12 | 伍仕明 | Simplified brake clearance automatic adjusting device and drum brake |
| CN114893517B (en) * | 2022-05-23 | 2023-08-15 | 伍仕明 | Automatic simplified brake clearance adjusting device and drum brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |