CN201027870Y - Quincuncial sleeve type braking gap adjustment arm - Google Patents
Quincuncial sleeve type braking gap adjustment arm Download PDFInfo
- Publication number
- CN201027870Y CN201027870Y CNU2007200934558U CN200720093455U CN201027870Y CN 201027870 Y CN201027870 Y CN 201027870Y CN U2007200934558 U CNU2007200934558 U CN U2007200934558U CN 200720093455 U CN200720093455 U CN 200720093455U CN 201027870 Y CN201027870 Y CN 201027870Y
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- CN
- China
- Prior art keywords
- worm
- hole
- plum
- brake clearance
- blossom
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- Expired - Fee Related
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Abstract
The utility model relates to a plum-blossom cover type brake clearance adjusting arm and belongs to the automobile technical field, in particular to a device which adjusts the clearance between an automobile brake drum and a frication plate. The plum-blossom cover type brake clearance adjusting arm comprises a housing which is provided inside with a worm wheel and a worm which is matched with the worm wheel; a worm axle which is coaxial with the worm is pressed into an inner hole of the worm by a spline tooth of 90 degrees in the middle to make the worm axle and the worm into a whole. A hexagonal screw cap end of the worm axle is drilled with a screw thread hole, a column shoulder hole and a through hole which is vertical to the shoulder hole; the shoulder hole and the screw thread hole are in turn and inside provided with a compression spring, a big steel ball, small steel balls and an adjusting bolt; under the effect of the spring force produced by the compression spring, the big steel ball presses against the two small balls which are symmetrically arranged in the through hole and the groove of the plum-blossom cover to enable the two small steel balls to be respectively locked in the concave groove of the plum-blossom cover, thereby the worm axle is locked. As the outer cylindrical surface of the plum-blossom cover is pressed into the column hole of the housing by interference and is fixed, the brake clearance adjusting arm can be kept stable by the device of the embodiment when a vehicle runs normally.
Description
Technical field
The utility model relates to a kind of vehicle and adopts the plum blossom shell type brake clearance of drum brake to adjust arm, belongs to the brake system of car technical field.
Background technique
In the using process of vehicle,, cause brake clearance to increase owing to the wearing and tearing of Brake shoe lining or brake drum lose reasons such as circle.Cause the time lengthening of braking; On the other hand, because the brake drum of each wheel of vehicle is different with the degree of wear of Brake shoe lining, the brake clearance between each wheel does not wait, and causes vehicle that sideslip takes place when braking.Bring hidden danger to vehicle driving.In order to guarantee that vehicle has best braking effect, require break must keep having between brake shoe and the brake drum normal, a rational minimum clearance.At present, the most generally the solution of Cai Yonging is: the driver is when vehicle maintenance or maintenance, and the manual adjustment brake clearance is adjusted arm.Brake clearance is adjusted to the optimum state.
At present, the structural type of brake clearance manual adjusting arm is a lot, except several structures of comparative maturity, has some to have some problems on structure and technology are made, for the conversion of new technology has increased difficulty.
The purpose of this utility model provides the optimized project that a kind of brake clearance is adjusted arm.Make its structure more practical, keep in repair conveniently, manufacturing process is more reasonable.
Summary of the invention
The brake clearance that the purpose of this utility model provides in a kind of vehicle brake is adjusted arm.By optimization, improvement, and propose one in all practical schemes in aspect such as manufacturing process, structure, uses to present existing structure.
The purpose of this utility model is achieved in that a kind of plum blossom shell type brake clearance adjustment arm.Comprise housing (1) in the present embodiment, housing (1) top is a swing arm, and a circular hole is arranged in the swing arm, and circular hole inside is pressed into axle sleeve (7), is connected with brake chamber with this hole when plum blossom shell type brake clearance adjustment arm is installed on the vehicle; Be equipped with in the housing (1) worm gear (2) and be meshed with worm gear (2) worm screw (6); The inner spline housing of worm gear (2) is contained on the camshaft of vehicle brake, is connected with break; Worm screw (6) is spent spline tooths with 90 of worm shaft (4) diameter of axle stage casing and adopts interference fit, and it is linked into an integrated entity.Six square nut ends at worm shaft (4) are drilled with tapped hole and cylinder shoulder hole; Perpendicular with the cylinder shoulder hole, with the corresponding position of plum-blossom sleeve (11) be drilled with radial direction through hole (16); Pressure spring (8), big steel ball (9), small ball (10) are housed in tapped hole, shoulder hole and radial direction through hole (16) successively and adjust screw (13); Under the spring force effect of spring (8), big steel ball (9) withstands symmetry and is installed in two small balls (10) in the radial direction through hole (16), make its cylndrical surface of protruding worm shaft (4) after, be stuck in the arc groove of plum-blossom sleeve (11) locking worm shaft (4); Plum-blossom sleeve (11) adopts the powdered metallurgical material sintering to form, and when mounted, the cylindrical hole of its external cylindrical surface and housing (1) adopts interference fit; It is motionless to interfix after being pressed into.Worm shaft (4), worm screw (6), worm gear (2) can not rotate in the time need not adjusting like this; So can making brake clearance adjust arm, the mechanism in the present embodiment when normal vehicle operation, keeps stable.
The radius of the interior arc groove of plum-blossom sleeve (11) equates with the spherical radius of small ball (10).
In the present embodiment, the effect of adjustment screw (13) is:
When plum blossom shell type brake clearance adjustment arm is in normal operating condition: the distance that keeps (b) between the front-end face of adjustment screw (13) and the big steel ball (9); And will adjust screw (13) and be fixed in the tapped hole of worm shaft (4), avoid it loosening.
When installation maybe needs to dismantle worm shaft (4): will adjust screw (13) and screw in to the direction of big steel ball (9), make the front-end face of adjusting screw (13) withstand big steel ball (9), big steel ball (9) pressure spring (8) is also inwardly moved axially, move to small ball (10) and can withdraw fully in the radial direction through hole (16) of worm shaft (4), and disengage with the arc groove of plum-blossom sleeve (11).So that installation or removal;
In the present embodiment, enter in the housing, between the end face of six square nut flanges of worm shaft (4) and plum-blossom sleeve (11), dustproof cushion rubber (12) is housed for fear of dust.
In the present embodiment, between the cylindrical hole end face of six square nut end face of flange of worm shaft (4) and housing (1), leave gap (a), prevent when rotary worm axle (4) and housing (1) interferes;
Also have grease nipple (14), jam (5), cover plate (3) and rivet (15) in addition in the present embodiment;
Description of drawings
Accompanying drawing 1 is a structure principle chart of the present utility model;
Accompanying drawing 2 is C-C partial sectional views that worm screw of the present utility model is connected with the worm shaft spline;
The D-D part section structural representation at accompanying drawing 3 plum-blossom sleeve of the present utility model places;
Among the figure: housing (1), worm gear (2), cover plate (3), worm shaft (4), jam (5), worm screw (6), cover (7), spring (8), big steel ball (9), little steel ball (10), plum-blossom sleeve (11), dustproof cushion rubber (12), adjustment screw (13), grease nipple (14), rivet (15).
Embodiment
The utility model embodiment's working principle is described in detail as follows:
As shown in Figure 1: in the present embodiment, plum blossom shell type brake clearance is adjusted arm and is made up of housing (1), worm gear (2), worm screw (6), worm shaft (4), spring (8), big steel ball (9), little steel ball (10), plum-blossom sleeve (11), dustproof cushion rubber (12), adjustment screw (13) etc.; Worm gear (2) is meshed with worm screw (6), and is loaded in the housing (1).
As shown in Figure 2: in the present embodiment, interference fit is adopted in the hole of degree spline tooth of 90 on the diameter of axle of worm shaft (4) and worm screw (6), and it is connected in one.
Shown in accompanying drawing 1, accompanying drawing 3: six square nut ends of worm shaft (4) be drilled with tapped hole, shoulder hole and with the perpendicular radial direction through hole (16) in this hole; Spring (8), big steel ball (9), small ball (10) are installed in the hole successively and adjust screw (13); Big steel ball (9) can move axially under the effect of spring (8).Two small balls (10) symmetry is installed in the groove of through hole (16) and plum-blossom sleeve (11).
When brake clearance just often, plum blossom shell type brake clearance is adjusted arm not to be needed to adjust: spring this moment (8) withstands big steel ball (9) and small ball (10).Owing to reason on the structure, the radial force of big steel ball (9) is pushed out to the cylndrical surface of protruding worm shaft (4) with small ball (10) along through hole (16), and its projection is snapped in the arc groove of plum-blossom sleeve (11); Because the external cylindrical surface of plum-blossom sleeve (11) is that interference is pressed in the shoulder hole of housing (1), can not rotate with respect to housing (1), so just worm shaft (4) is locked in the fixed position;
When the brake clearance of break exceeds setting value, when needing to adjust plum blossom shell type brake clearance adjustment arm: six square nuts that screw worm shaft (4) with spanner make its rotation, under the effect of the running torque of spanner, the opposite force of plum-blossom sleeve (11) arc groove acts on small ball (10), big steel ball (9) and pressure spring (8); Small ball (10) is returned in the cylndrical surface of worm shaft (4) along through hole (16) radial compression, disengage with the arc groove of plum-blossom sleeve (11); When worm shaft (4) rotates to a new position, under the spring force effect of pressure spring (8), small ball (10) is jumped into again in the next teeth groove of plum-blossom sleeve (11), make worm shaft (4), worm screw (6) turn over an angle, drive worm gear (2), camshaft rotation simultaneously, reach the purpose of adjusting brake clearance.
Claims (6)
1. a plum blossom shell type brake clearance is adjusted arm: be equipped with in the housing (1) worm gear (2) and be meshed with it worm screw (6); With worm screw (6) coaxial worm axle (4) by spline tooth and worm screw (6) interference fit.Six square nut ends of worm shaft (4) be drilled with tapped hole, cylinder shoulder hole and with the perpendicular radial direction through hole (16) of shoulder hole; It is characterized in that: pressure spring (8), big steel ball (9), small ball (10) are housed in tapped hole, shoulder hole and radial direction through hole (16) successively and adjust screw (13); Under the spring force effect of spring (8), big steel ball (9) withstands symmetry and is installed in two small balls (10) in the through hole (16), make it protrude worm shaft (4) cylndrical surface after, snap in the arc groove of plum-blossom sleeve (11) locking worm shaft (4) respectively;
2. plum blossom shell type brake clearance according to claim 1 is adjusted arm, it is characterized in that: the spline tooth of worm screw (6) and worm shaft (4) adopts interference fit; The tooth-shape angle of spline tooth is 90 degree.
3. plum blossom shell type brake clearance according to claim 1 is adjusted arm, it is characterized in that: leave gap (a) between six square nut end face of flange of worm shaft (4) and housing (1) cylindrical hole end face.
4. plum blossom shell type brake clearance according to claim 1 is adjusted arm, it is characterized in that: the distance that keeps (b) when normal operating condition between the front-end face of adjustment screw (13) and the big steel ball (9); And will adjust screw (13) and be fixed in the tapped hole of worm shaft (4), must not become flexible.
5. plum blossom shell type brake clearance according to claim 1 is adjusted arm, it is characterized in that: the cylindrical hole of the external cylindrical surface of plum-blossom sleeve (11) and housing (1) adopts interference fit.
6. plum blossom shell type brake clearance according to claim 1 is adjusted arm, and it is characterized in that: the radius of the interior arc groove of plum-blossom sleeve (11) equates with the spherical radius of small ball (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200934558U CN201027870Y (en) | 2007-03-28 | 2007-03-28 | Quincuncial sleeve type braking gap adjustment arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200934558U CN201027870Y (en) | 2007-03-28 | 2007-03-28 | Quincuncial sleeve type braking gap adjustment arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201027870Y true CN201027870Y (en) | 2008-02-27 |
Family
ID=39132080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200934558U Expired - Fee Related CN201027870Y (en) | 2007-03-28 | 2007-03-28 | Quincuncial sleeve type braking gap adjustment arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201027870Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443849A (en) * | 2015-12-11 | 2016-03-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Angle-adjustable trip mechanism for controlling hydraulic slide valve |
| CN108087502A (en) * | 2017-12-15 | 2018-05-29 | 惠阳航空螺旋桨有限责任公司 | A kind of rotation device for precisely regulating |
-
2007
- 2007-03-28 CN CNU2007200934558U patent/CN201027870Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443849A (en) * | 2015-12-11 | 2016-03-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Angle-adjustable trip mechanism for controlling hydraulic slide valve |
| CN108087502A (en) * | 2017-12-15 | 2018-05-29 | 惠阳航空螺旋桨有限责任公司 | A kind of rotation device for precisely regulating |
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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: 20080227 Termination date: 20110328 |