CN201100353Y - An automatic adjustment arm assembly for card braking gap - Google Patents
An automatic adjustment arm assembly for card braking gap Download PDFInfo
- Publication number
- CN201100353Y CN201100353Y CNU2007201919377U CN200720191937U CN201100353Y CN 201100353 Y CN201100353 Y CN 201100353Y CN U2007201919377 U CNU2007201919377 U CN U2007201919377U CN 200720191937 U CN200720191937 U CN 200720191937U CN 201100353 Y CN201100353 Y CN 201100353Y
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- Prior art keywords
- worm screw
- worm
- main
- arm
- spring
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Abstract
The utility model discloses an automobile brake clearance automatic adjustment arm assembly, which comprises a brake arm, a main worm-gear worm transmission mechanism, a spring preloaded mechanism, a one-way clutch assembly and a clearance control mechanism, wherein the main worm-gear worm transmission mechanism, the spring preloaded mechanism, the one-way clutch assembly and the clearance control mechanism are arranged in the brake arm, the mounting angle of the automobile brake clearance automatic adjustment arm assembly can be changed in accordance with the mounting requirements, the automobile brake clearance automatic adjustment arm assembly can be applicable to various mounting environments, and the utilization range is enlarged.
Description
Technical field
The utility model relates to a kind of arm for adjusting automobile brake clearance automatically assembly.
Background technique
It is to be contained on the air pressure S cam drum type brake that brake clearance is adjusted arm assembly, relies on excessive gap between inner elastic mechanism record brake drum and the friction plate, in the middle of the brake off process this excessive gaps is adjusted.Existing arm for adjusting automobile brake clearance automatically assembly has angle limits when installing, and can not be used for different vehicle bridge, restricted application.
The model utility content
The technical problems to be solved in the utility model provides a kind of arm for adjusting automobile brake clearance automatically assembly, does not have angle limits during installation.
For solving the problems of the technologies described above, the utility model adopts following technological scheme: the main Worm and worm-wheel gearing that this arm for adjusting automobile brake clearance automatically assembly comprises brake arm and is located at brake arm inside, spring pretightening mechanism, free-wheeling assembly, gap control mechanism, described main Worm and worm-wheel gearing all is installed on the spline of drum brake, described spring pretightening mechanism closely links to each other main Worm and worm-wheel gearing with free-wheeling assembly, described free-wheeling assembly is controlled by gap control mechanism, main Worm and worm-wheel gearing comprises main worm gear and main worm screw, described spring pretightening mechanism comprises pressure spring, bearing, described pressure spring and bearing are enclosed within on the main worm screw from left to right successively, described free-wheeling assembly comprises secondary worm gear, the rectangle spring, the clutch ring, worm screw is regulated head, described worm screw is regulated a left end that is installed in main worm screw and links with main worm screw, described clutch ring is regulated head with worm screw and is closely linked to each other under the effect of pressure spring elastic force, described secondary worm gear and rectangle spring all are located at the pressure spring outside, described secondary worm gear is movably connected on the bearing, one end is by described rectangle spring and the interlock of clutch ring, described secondary worm gear, the junction surface of clutch ring and rectangle spring all is the flank of tooth, described worm screw is regulated head and is fixed on brake arm inside by end cap, described gap control mechanism comprises control arm and secondary worm screw, be an annulus on the described control arm, annulus prolongs the structure that radially outward is provided with the extension, described control arm partly is provided with the outer straight-tooth of annular internal spline and arc shooting at annulus, described control arm annulus part is on the position of concentric with main worm gear, described control arm is by engagement of the straight-tooth on outer straight-tooth and the secondary worm screw and secondary worm screw interlock, and described secondary worm screw and secondary worm gear are in the crossing state of the flank of tooth but have brake clearance between both flank of tooth.
As of the present utility model a kind of preferred, the left end of described main worm screw is a regular polygon, described worm screw adjusting head is provided with the regular polygon hole of corresponding main worm screw left end, and described main worm screw links together by regular polygon hole and the worm screw adjusting head that its left end inserts worm screw adjusting head.Adopt such Placement can tackle the big moment that worm screw produces, avoid the generation of sliding friction, prolong the working life of parts; Rotate continuously stable work in work simultaneously.
The utility model adopts technique scheme, and the setting angle of arm for adjusting automobile brake clearance automatically assembly can change angle according to installation requirement, thereby can adapt to various installation environments, has enlarged using scope.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Fig. 1 is the internal structure schematic representation of a kind of arm for adjusting automobile brake clearance automatically assembly of the utility model;
Fig. 2 is the secondary worm and gear assembling schematic representation of a kind of arm for adjusting automobile brake clearance automatically assembly of the utility model;
Fig. 3 is the plan view of a kind of arm for adjusting automobile brake clearance automatically assembly of the utility model.
Embodiment
As shown in Figure 1, brake arm 1 inside of arm for adjusting automobile brake clearance automatically assembly is provided with a bigger main worm gear 2 and main worm screw 3, and they have formed a main Worm and worm-wheel gearing; The middle part of main worm screw 3 is provided with screw thread, the straight-tooth in it and main worm screw 3 outsides is in engagement all the time, the other parts of main worm screw 3 become the axle shape, be provided with the internal spline corresponding in the inside of main worm gear 2, have only that master's worm gear 2 could be in brake arm 1 inner rotation when main worm screw 3 is rotated with the spline of drum brake.Main worm screw 3 left-half are equipped with spring pretightening mechanism, and this mechanism comprises bearing 5 and pressure spring 4.Bearing 5 is the multidiameter shaft shape, and the endoporus at bearing 5 middle parts is stepped shaft, and it is corresponding with the shape of main worm screw 3, and bearing 5 plays the effect of supporting main worm screw 3 on the axial direction of vertical main worm screw 3.Pressure spring 4 also is enclosed within on the main worm screw 3 and is positioned at the left side of main worm screw 3.Outer cover at spring pretightening mechanism is equipped with free-wheeling assembly, and free-wheeling assembly is provided with secondary worm gear 6, rectangle spring 7, clutch ring 8, worm screw and regulates 9; Worm screw is regulated 9 and is provided with a regular polygon hole, and the left end of main worm screw 3 is a regular polygon, therefore main worm screw 3 inserts worm screw by its left end and regulates a regular polygon hole of 9 and worm screw and regulate 9 and link together, and worm screw adjusting 9 is fixed on brake arm 1 inside by end cap 10; Clutch ring 8 is compressed spring 4 and tightly is pressed in worm screw and regulates on 9, makes clutch ring 8 and worm screw regulate 9 and links by the frictional force between them; Secondary worm gear 6 is sleeved on the bearing 5, link together by rectangle spring 7 between it and the clutch ring 8, secondary worm gear 6, clutch ring 8 all are the flank of tooth with the junction surface of rectangle spring 7, thus rectangle spring 7 by with the hard purpose that reaches auxiliary connection worm gear 6 and clutch ring 8 that is connected of the flank of tooth; Gap control mechanism comprises control arm 11 and secondary worm screw 12, control arm 11 is an annulus and prolongs the radially outer structure that is provided with the extension, partly be provided with the outer straight-tooth of annular internal spline and arc shooting at annulus, and this annulus part is on the position of concentric with main worm gear 2, and its internal spline size is identical with the internal spline size of main worm gear 2; Secondary worm screw 12 and the crossing state of 6 one-tenths flank of tooth of secondary worm gear, but have brake clearance between secondary worm screw 12 and secondary worm gear 6 could be in engagement with secondary worm gear 6 after having only secondary worm screw 12 rotations a certain amount of; Control arm 11 by on outer straight-tooth and the secondary worm screw 12 the straight-tooth engagement link with secondary worm screw 12.
During installation, the arm for adjusting automobile brake clearance automatically assembly is contained on the spline of drum brake, this moment main worm gear 2 and control arm 11 all with this spline on, the tilt fixing of control arm 11 can be made change as required, as long as just can install guaranteeing between secondary worm screw 12 and the secondary worm gear 6 enough brake clearances are arranged after determining suitable control arm 11 setting angles after.During normal brake application, brake arm 1 rotates, and control arm 11 forces secondary worm screw 12 to be rotated, and then brake clearance dwindles gradually, just mesh with secondary worm gear 6 until secondary worm screw 12 but does not make the trend of secondary worm gear 6 rotations; During brake off, control arm 11 returns, secondary worm screw 12 is cooked counterrotating under the effect of control arm 11, make brake clearance get back to previous size.When the brake drum of drum brake inside and the gap between the friction plate become big, the quantitative change that braking back brake arm 1 rotates is big, at the back control arm 11 of eliminating brake clearance secondary worm screw 12 is rotated further, and then drive secondary worm gear 6 and rotate, the secondary worm gear 6 that rotates makes rectangle spring 7 open, because rectangle spring 7 is blocked by clutch ring 8 at clutch ring 8 places, so clutch ring 8 is also driven, the clutch ring 8 that rotates further drives worm screws and regulates 9, thereby rotate main worm screw 3, main worm screw 3 drives main worm gear 2 rotations makes the spline of drum brake turn over several angle.When braking is removed, secondary worm screw 12 backward rotation also drive secondary worm gear 6 backward rotation after recovering brake clearance, this moment, secondary worm gear 6 and 7 generations of rectangle spring were skidded, and main like this worm gear 2 just is in adjusted state, thereby reached the purpose of the excessive gaps between compensation brake drum and the friction plate.
Claims (2)
1, a kind of arm for adjusting automobile brake clearance automatically assembly, comprise brake arm (1) and be located at the inner main Worm and worm-wheel gearing of brake arm (1), spring pretightening mechanism, free-wheeling assembly, gap control mechanism, described main Worm and worm-wheel gearing all is installed on the spline of drum brake, described spring pretightening mechanism closely links to each other main Worm and worm-wheel gearing with free-wheeling assembly, described free-wheeling assembly is controlled by gap control mechanism, main Worm and worm-wheel gearing comprises main worm gear (2) and main worm screw (3), it is characterized in that: described spring pretightening mechanism comprises pressure spring (4), bearing (5), described pressure spring (4) and bearing (5) are enclosed within on the main worm screw (3) from left to right successively, described free-wheeling assembly comprises secondary worm gear (6), rectangle spring (7), clutch ring (8), worm screw is regulated head (9), described worm screw adjusting head (9) is installed in the left end of main worm screw (3) and links with main worm screw (3), described clutch ring (8) is regulated head (9) with worm screw and is closely linked to each other under the effect of pressure spring (4) elastic force, described secondary worm gear (6) and rectangle spring (7) all are located at pressure spring (4) outside, described secondary worm gear (6) is movably connected on the bearing (5), one end is by described rectangle spring (7) and clutch ring (8) interlock, described secondary worm gear (6), clutch ring (8) all is the flank of tooth with the junction surface of rectangle spring (7), described worm screw is regulated head (9) and is fixed on brake arm (1) inside by end cap (10), described gap control mechanism comprises control arm (11) and secondary worm screw (12), be an annulus on the described control arm (11), annulus prolongs the structure that radially outward is provided with the extension, described control arm (11) partly is provided with the outer straight-tooth of annular internal spline and arc shooting at annulus, described control arm (11) annulus part is on the position of concentric with main worm gear (2), described control arm (11) is by engagement of the straight-tooth on outer straight-tooth and the secondary worm screw (12) and secondary worm screw (12) interlock, and described secondary worm screw (12) and secondary worm gear (6) are in the crossing state of the flank of tooth but have brake clearance between both flank of tooth.
2, according to the described arm for adjusting automobile brake clearance automatically assembly of claim 1, it is characterized in that: the left end of described main worm screw (3) is a regular polygon, described worm screw adjusting head (9) is provided with the regular polygon hole of corresponding main worm screw (3) left end, and described main worm screw (3) links together by regular polygon hole and the worm screw adjusting head (9) that its left end inserts worm screw adjusting head (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201919377U CN201100353Y (en) | 2007-11-01 | 2007-11-01 | An automatic adjustment arm assembly for card braking gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201919377U CN201100353Y (en) | 2007-11-01 | 2007-11-01 | An automatic adjustment arm assembly for card braking gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201100353Y true CN201100353Y (en) | 2008-08-13 |
Family
ID=39936887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201919377U Expired - Lifetime CN201100353Y (en) | 2007-11-01 | 2007-11-01 | An automatic adjustment arm assembly for card braking gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201100353Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11209062B2 (en) | 2019-05-15 | 2021-12-28 | Bendix Commercial Vehicle Systems Llc | Automatic slack adjuster |
-
2007
- 2007-11-01 CN CNU2007201919377U patent/CN201100353Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11209062B2 (en) | 2019-05-15 | 2021-12-28 | Bendix Commercial Vehicle Systems Llc | Automatic slack adjuster |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090109 Address after: Zhuji City, Zhejiang Province town of Wan An science and Technology Park, zip code: 311835 Patentee after: Zhejiang VIE Science & Technology Co., Ltd. Address before: Zhuji City, Zhejiang Province town of Wan An science and Technology Park, zip code: 311835 Patentee before: Wan'an Group Zhuji Auto Parts Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG PROVINCE WANAN SCIENCE AND TECHNOLOGY CO. Free format text: FORMER OWNER: WAN AN GROUP ZHUJI AUTO PARTS CO., LTD. Effective date: 20090109 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080813 |