CN2522670Y - Brake clearance automatic adjusting arm - Google Patents
Brake clearance automatic adjusting arm Download PDFInfo
- Publication number
- CN2522670Y CN2522670Y CN 02208744 CN02208744U CN2522670Y CN 2522670 Y CN2522670 Y CN 2522670Y CN 02208744 CN02208744 CN 02208744 CN 02208744 U CN02208744 U CN 02208744U CN 2522670 Y CN2522670 Y CN 2522670Y
- Authority
- CN
- China
- Prior art keywords
- ratchet
- brake
- arm
- adjusting arm
- automatic 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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- Braking Arrangements (AREA)
Abstract
The utility model relates to a brake clearance automatic adjusting arm which comprises a shell, a worm wheel and a worm gearing transmission. One end of the automatic adjusting arm is connected with a braking aerodynamic link bar, and the other end of the automatic adjusting arm is connected with a brake camshaft by a worm wheel inner spline. One end of the automatic adjusting arm is connected with a connecting sleeve by a pin. One end of the connecting sleeve is connected with the pneumatic handspike, and the other end of the connecting sleeve is connected with a spiral tooth ratchet by a linkage coupling ratcheting mechanism so as to simultaneously rotate the worm. A detent arranged on the shell is meshed with the ratchet wheel. The utility model can automatically adjust the clearance, and is of reliable operation. The utility model can be applicable to a variety of motor vehicle braking devices.
Description
Technical field
The utility model belongs to the brake of motor-driven vehicle device, is specifically related to a kind of arm for automatically regulating clearance of brake.
Background technique
The drag friction pair is the main wearout parts in the middle of the motor-driven vehicle going, and along with the increase of using frequency and the prolongation of time, drag friction subtask face will increase the reservation standard clearance between the rubbing surface because of wearing and tearing.And because the various factors influence, with the gap that increases because of wearing and tearing between each wheel brake friction pair of car and not quite identical.The gap such as the untimely adjustment that increase will cause a hidden trouble to traffic safety.In the present Motor Vehicle equipment, adopt manually usually and adjust.The adjustment process effort is time-consuming, and can not adjust at any time at random, is unfavorable for traffic safety.From known document, for example CN2414958, CN2425804 disclosed " automobile brake brake wearing piece wear automatic-compensation device " and " arm for adjusting automobile brake clearance automatically " technological scheme, adopt gear, tooth bar and Clutch Control, structure is comparatively complicated, and rate of breakdown is corresponding might to be increased.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, and reliable operation can be adjusted the compensation Motor Vehicle at random at any time because of the braking gap that frequently braking increases, and makes asking of drag friction pair remain the arm for automatically regulating clearance of brake that conforms with the operating mode standard clearance.
The utility model is taked following technological scheme.
Arm for automatically regulating clearance of brake includes housing, and worm gear, worm transmission pair are adjusted arm one end automatically and linked with the pneumatic link rod of brake, and the other end is through worm gear internal spline and brake camshaft interlock.Automatically adjust arm one end and connect coupling sleeve with bearing pin.Coupling sleeve one end and air-leg link, and the other end is arranged on ratchet and ratchet fit engagement on the housing with the synchronous rotary worm of ratchet of connecting rod connection ratchet mechanism.The ratchet of ratchet is uniform in the shape of a spiral.The pitch angle alpha will of ratchet ratchet
1Be 15-40 °.The relative ratchet shaft of the back of tooth of the ratchet of helical tooth ratchet radially be 0 °, the angle α of the flank of tooth and the back of tooth
2Be 30-70 °.
The utility model has tangible technique effect compared to existing technology.Real train test, braking gap can be adjusted automatically, reliable operation.Country's car quality supervision and test center check: " gap is transferred to 2mm, and after the adjustment arm assembly was braked 80 times continuously, the gap was 0.55mm (NBS is 0.4-0.7mm) "; Life test " after 500,000 tests, parts are not seen any damage, and working properly "
Description of drawings
Accompanying drawing 1 is the arm for automatically regulating clearance of brake structural drawing
Accompanying drawing 2 is an arm for automatically regulating clearance of brake A-A sectional view
Accompanying drawing 3 is arm for automatically regulating clearance of brake helical tooth ratchet, ratchet meshing engagement structure figure
Accompanying drawing 4 is arm for automatically regulating clearance of brake helical tooth ratchet, ratchet meshing engagement structure left view
Accompanying drawing 5 is arm for automatically regulating clearance of brake helical tooth ratchet, ratchet profile of tooth engagement figure
Embodiment:
Below in conjunction with accompanying drawing the utility model is described in detail.Automatic reglation arm for braking gap includes housing (6), worm gear, worm transmission pair (7), (10).Automatically adjust arm one end and link with the pneumatic link rod of brake, the other end is through worm gear (7) internal spline and brake camshaft interlock.Coupling sleeve (1) one end and air-leg link, and the other end is with connecting rod (2) link block (9), pushing tow or promote ratchet (3).The internal spline of ratchet (3) cooperates connection with worm screw (10).Be arranged on ratchet (4) and ratchet (3) fit engagement on the housing (6).The ratchet of ratchet (3) is uniform in the shape of a spiral.The pitch angle alpha will that the helical tooth trajectory of ratchet (3) forms to the axis with ratchet (3)
1Be 15-40 °.The relative ratchet shaft of the back of tooth of the ratchet of helical tooth ratchet (3) radially be 0 °, the angle α of the flank of tooth and the back of tooth
1Be 30-70 °.
Arm for automatically regulating clearance of brake is with the center of circle of worm gear (7), the contact points of worm gear, worm transmission pair, and the tie-point of coupling sleeve (1) and connecting rod (2) and housing (6) support arm is that fulcrum forms one and overlaps " four-bar linkage " mechanism.Under standard braking gap state, brake cylinder push rod pushing tow coupling sleeve (1) drives adjusts the arm body rotation, and connecting rod (2) overcomes the reservation backlash of slide block (9), and ratchet (3) does not rotate.Adjust arm body drive worm gear (7) rotating cam axle spline and act on the secondary proper functioning of drag friction.
When braking gap increases, the corresponding increase of pivot angle of worm gear (7) rotating cam axle spline, driving the pivot angle of adjusting arm body increases, because the interlock effect of " four-bar linkage " mechanism, connecting rod (2) will overcome the reservation backlash of slide block (9), promote ratchet (3) jumping tooth and cross the corresponding number of teeth that orientation is fixed on the ratchet (4) on the housing, rotary worm when resetting (10) drives worm gear (7) and rotates respective angles, overcomes the backlash gap of causing because of wearing and tearing between the friction pair.5 is the Returnning spring of ratchet (4) among the figure, and 8 is the coupling pin of slide block (9) and connecting rod (2).
Simultaneously, orientation is fixed on ratchet (4) on the housing by profile of tooth engagement, also can prevent because of mechanical backlash causes worm screw can not self-locking, cause the situation of brake failure.
Claims (4)
1, a kind of arm for automatically regulating clearance of brake, include housing (6), worm gear, worm transmission pair (7), (10), automatically adjusting arm one end links with the pneumatic link rod of brake, the other end is through worm gear (7) internal spline and brake camshaft interlock, it is characterized in that adjusting automatically arm one client link coupling sleeve (1), coupling sleeve (1) one end and air-leg link, the other end connects the ratchet (3) of ratchet mechanism with connecting rod (2), ratchet (3) cooperates connection with internal spline with worm screw (10), is arranged on ratchet (4) and ratchet (3) fit engagement on the housing (6).
2, a kind of arm for automatically regulating clearance of brake as claimed in claim 1 is characterized in that the ratchet of ratchet (3) is uniform in the shape of a spiral.
3, a kind of arm for automatically regulating clearance of brake as claimed in claim 2 is characterized in that the pitch angle alpha will of ratchet (3) ratchet
1Be 15-40 °.
4, a kind of arm for automatically regulating clearance of brake as claimed in claim 2, it is characterized in that ratchet (3) ratchet the relative ratchet shaft of the back of tooth radially be 0 °, the angle α of the flank of tooth and the back of tooth
2Be 30-70 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02208744 CN2522670Y (en) | 2002-03-27 | 2002-03-27 | Brake clearance automatic adjusting arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02208744 CN2522670Y (en) | 2002-03-27 | 2002-03-27 | Brake clearance automatic adjusting arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2522670Y true CN2522670Y (en) | 2002-11-27 |
Family
ID=33689343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02208744 Expired - Fee Related CN2522670Y (en) | 2002-03-27 | 2002-03-27 | Brake clearance automatic adjusting arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2522670Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281967A (en) * | 2018-11-26 | 2019-01-29 | 王军 | A kind of brake automatic gap adjustment device and drum brake |
-
2002
- 2002-03-27 CN CN 02208744 patent/CN2522670Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281967A (en) * | 2018-11-26 | 2019-01-29 | 王军 | A kind of brake automatic gap adjustment device and drum brake |
| CN109281967B (en) * | 2018-11-26 | 2020-01-07 | 王军 | Automatic brake clearance adjusting device of brake 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 |