CN201050567Y - Automatic regulation arm for braking gap - Google Patents
Automatic regulation arm for braking gap Download PDFInfo
- Publication number
- CN201050567Y CN201050567Y CNU2007201039470U CN200720103947U CN201050567Y CN 201050567 Y CN201050567 Y CN 201050567Y CN U2007201039470 U CNU2007201039470 U CN U2007201039470U CN 200720103947 U CN200720103947 U CN 200720103947U CN 201050567 Y CN201050567 Y CN 201050567Y
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- Prior art keywords
- arm
- screw
- worm shaft
- braking gap
- gap
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- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 206010039203 Road traffic accident Diseases 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000001226 toe joint Anatomy 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The utility model relates to a brake gap self-correcting arm which adopts a bevel gear clutch as an exceeding mechanism and a double spiral groove drive, and the setting value of a free gap can be adjusted outside. The utility model comprises a U-shaped fork, a correcting arm shell, a connecting bar with a free gap control, a drive cylindrical pin, a double spiral drive sleeve and a worm shaft. The U-shaped fork is hinged to the correcting arm shell, one end of the U-shaped fork is connected with a handspike of a brake branch pump, and the other end is hinged to the connecting bar. The lower end of the connecting bar is rivet-jointed with a candan universal joint and is hinged to the double spiral drive sleeve with a tapered tooth clutch through the drive cylindrical pin, the inner tapered tooth of the double spiral drive sleeve and the outer tapered tooth of the worm shaft form the tapered tooth clutch. The brake gap self-correcting arm of the utility model has the advantages that when over correction or under correction is existed, the self-correcting arm does not need to be disassembled, the setting value of the free gap can be conveniently adjusted, thereby ensuring that the setting value is matched with the actual requirement value. Any supporting frame is not needed to be installed, the left and the right do not need to be differentiated, the commonality of the correcting arm is strong, and the installation is very convenient.
Description
Technical field
The utility model relates to automobile braking device, is specifically related to a kind of automatic reglation arm for braking gap.
Background technique
1, arm (rack-and-pinion as Sweden HALDEX company is adjusted arm etc. automatically) is adjusted in existing braking automobile gap automatically; All be to adopt spring clutch as the one-way element of realizing automatic compensation function, cylindrical clutch spring in brake stroke medi-spring clutch surmounts, and in the brake backhaul, drive the worm screw rotation by the surperficial frictional force of the cylindrical (or endoporus) of cylindrical clutch spring, compensate automatically; After long-term the use, because the wearing and tearing of clutch spring cylinder working surface or the variation of lubrication state can make the clutch spring working surface skid, influence its functional reliability and working life, severe patient can be lost the realization automatic compensation function; In addition, when certain component in the vehicle bridge break (as camshaft, camshaft stand, braking shoes etc.) make resistance that break produces in the backhaul in brake for some reason greater than the frictional force of cylindrical clutch spring working surface, just do not realize automatic compensation function;
2, present, arm is adjusted in the braking automobile gap that use the home and abroad automatically, and its free clearance setting device great majority are to be hidden in automatic adjustment arm housing inside, and its free clearance setting value of each description all immobilizes, and can't adjust." dial " formula of minority such as WABCO company and Clayton Dewandre company is adjusted arm automatically, though its free clearance setting device is being adjusted the arm housing outside automatically, but its free clearance setting value is also fixed, and change the free clearance value by the size (or the size of stirring the pin diameter) that changes disk poking notch;
Owing to adjust the free clearance setting value of arm manufactory design and not matching of the needed free clearance value of automobile factory's car load vehicle bridge break automatically, will produce following two kinds of situations:
1) when the free clearance setting value of automatic adjustment arm design during less than the needed free clearance value of vehicle bridge break, will produce " toning " (being overcompensation), make the vehicle bridge brake band brake work, it is overheated to produce, and tyre break and traffic accident appear in severe patient;
2) when the free clearance setting value of automatic adjustment arm design during, will produce " less stress " (being undercompensation), make vehicle bridge brake weakness, traffic accident also takes place easily greater than the needed free clearance value of vehicle bridge break.(the long-term phase uses the back also can produce this phenomenon because of component wear)
For the automobile of operating, because the wearing and tearing of braking system, design load when the actual needed free clearance value of vehicle bridge break is dispatched from the factory with new car is can be not the same, brake shoe and braking hub are easily damaged partss, when regular servicing, to change sometimes, at this moment will make the free clearance setting value of automatic adjustment arm design match just difficult more." toning " or " less stress " phenomenon more is easy to generate.
Recognize by inquiry, many city bus companies and long-distance passenger transportation company, no matter be automatic reglation arm for braking gap homemade or import, ubiquity the problems referred to above all, especially " toning " particularly outstanding, one pair of brake block of newly changing use 15-20 days just mill do not had, not only keep in repair wasteful, also influence bus dispatching rate, the traffic accident of Yin Faing also happens occasionally thus.Many users even pull down automatic adjustment arm use hand regulation arm instead.
The model utility content
The purpose of this utility model is the various defectives that overcome known technology, providing a kind of eliminates because " toning " or " less stress " causes vehicle bridge brake overheating or weakness, increase working life and functional reliability, can generally exchange the automatic reglation arm for braking gap that the free clearance setting value can externally be regulated.
The automatic reglation arm for braking gap that the utility model provides, comprise adjusting arm housing and being placed in one and be used to drive the worm screw of vehicle bridge break and the worm gear that is meshed with it, and the U type fork that drives the worm shaft of described worm screw rotation and be used for linking to each other with the wheel cylinder push rod, described adjustment arm housing and described U type fork are hinged by first flat-headed pin, the upper end of described adjustment arm housing inner chamber is equipped with and is used for the one-way element of compensation automatically, described worm screw and worm shaft are installed in the lower end of described adjustment arm housing inner chamber, and the upper-end surface of described worm shaft is provided with the outer cone tooth of using as clutch; Described one-way element comprises double helix driving casing and connecting rod, described double helix driving casing cylndrical surface is provided with two symmetries and connects the right-hand screw groove of body, be provided with the spacing hole jump ring in the adjustment arm housing above described screw drives cover, described double helix driving casing lower end surface is provided with the inner cone tooth of using as clutch that matches with described worm shaft upper-end surface outer cone tooth; Described connecting rod upper end is hinged by the arm end of second flat-headed pin and described U type fork, and the driving straight pin is equipped with in the lower end, and the two ends of described driving straight pin place two spiral chutes of described screw drives cover respectively; Described connecting rod stretches out above described adjustment arm housing, its upper end is provided with axial screw thread hole and perpendicular crossing radially long arc shape hole, adjusting screw is installed in the described axial screw thread hole, and with locking device locking, the gap between described adjusting screw and described second flat-headed pin constitutes braking gap free adjustment gap.
The utility model automatic reglation arm for braking gap, the distance that moves axially of wherein said one-way element is δ=0.5～1mm.
The utility model automatic reglation arm for braking gap, wherein said connecting rod lower end is connected with universal joint cross by rivet, and described driving straight pin level is installed in the bottom of described universal joint cross.
The utility model automatic reglation arm for braking gap, wherein said locking device are locking nut and spring washer.
The utility model automatic reglation arm for braking gap, flexible enclosure is equipped with in the upper end of wherein said adjustment arm housing.
The utility model automatic reglation arm for braking gap, wherein said worm shaft lower end are equipped with axle jump ring and following dirt-proof boot.
The advantage of the utility model automatic reglation arm for braking gap and good effect are:
1. owing to adopted awl tooth clutch one double spiral groove to drive, in the brake stroke, inside and outside awl tooth is separated, has only the rotation of double helix driving casing, and in the brake backhaul, inside and outside awl tooth promotes the worm screw rotation in the forced engagement under the pushing of connecting rod assembly, can guarantee that therefore Wimble tooth-like clutch has long working life and functional reliability;
2. adopt to drive straight pin and in double spiral groove, promote the double helix driving casing, can make adjust arm housing and be regardless of about, general exchange,, convenient when on automobile, installing as the installation hand regulation arm without any need for mounting bracket;
3. can make it to be complementary adjusting the arm housing external setting-up and regulating the free clearance setting value, reach the purpose of elimination " toning " or " less stress " with the gap width of vehicle bridge break actual demand.
Be elaborated with reference to accompanying drawing below in conjunction with embodiment, in the hope of the purpose of this utility model, feature and advantage are obtained more deep understanding.
Description of drawings
Fig. 1 is the structural drawing of the utility model automatic reglation arm for braking gap at brake stroke end of a period state;
Fig. 2 is the enlarged view of awl toe joint zygote disengaged condition among Fig. 1;
Fig. 3 is the structural drawing of the utility model automatic reglation arm for braking gap at brake backhaul end of a period state;
Fig. 4 is the enlarged view of awl toe joint zygote jointing state among Fig. 3;
Fig. 5 is the structural drawing of free clearance controlling device in the utility model automatic reglation arm for braking gap.
Embodiment
In the accompanying drawings:
1---worm shaft; 2---the axle jump ring; 3---following dirt-proof boot; 4---adjust arm housing; 5---worm screw; 6---drive straight pin; 7---the double helix driving casing; 8---connecting rod; 9---the hole jump ring; 10---U type fork; 11---first flat-headed pin; 12---second flat-headed pin; 13---adjusting screw; 14---locking nut; 15---spring washer; 16---nail; 17---universal joint cross; 18---flexible enclosure; 19---long arc shape hole radially.
Referring to Fig. 1 and Fig. 3, the utility model automatic reglation arm for braking gap comprises U type fork 10, adjustment arm housing 4, worm screw 5 and drives worm shaft 1, one-way element and the free clearance controlling device that worm screw 5 is rotated.U type fork 10 is used for linking to each other with the wheel cylinder push rod, and the arm end of U type fork 10 is equipped with the free clearance controlling device.It is hinged by first flat-headed pin 11 with two arms of U type fork 10 to adjust arm housing 4.The lower end of adjusting arm housing 4 inner chambers is equipped with worm screw 5 and worm shaft 1, and one-way element and the flexible enclosure 18 that is used for compensation automatically installed in the upper end.The upper-end surface of worm shaft 1 is provided with the outer cone tooth of using as clutch, and axle jump ring 2 and following dirt-proof boot 3 are equipped with in the lower end.
One-way element comprises double helix driving casing 7 and connecting rod 8.The cylndrical surface of double helix driving casing 7 is provided with two symmetries and connects the right-hand screw groove of body, and the top of screw drives cover 7 is provided with spacing hole jump ring 9, and the below is provided with the inner cone tooth of using, matching with worm shaft 1 upper-end surface outer cone tooth as clutch.Connecting rod 8 upper ends are hinged with the arm end and the free clearance controlling device of U type fork 10 by second flat-headed pin 12, the lower end is connected with universal joint cross 17 by rivet 16, universal joint cross 17 lower horizontal are equipped with and drive straight pin 6, and the two ends that drive straight pin 6 place two spiral chutes of screw drives cover 7 respectively.
The free clearance controlling device comprises adjusting screw 13, locking nut 14 and spring washer 15, connecting rod 8 upper ends are provided with axial screw thread hole and long arc shape hole 19 radially, adjusting screw 13 is installed in the described axial screw thread hole, and second flat-headed pin 12 is combined together with long arc shape hole 19 radially.Adjusting screw 13 is installed on the connecting rod 8 by locking nut 14 and spring washer 15.Gap between the adjusting screw 13 and second flat-headed pin 12 constitutes braking gap free adjustment gap.Distance between the end of adjusting screw 13 and second flat-headed pin, 12 cylindricals is free clearance setting value M, referring to Fig. 5, by regulating adjusting screw 13, just can change the M value, after the adjusting of M value is suitable, with locking nut 14 and spring washer 15 adjusting screw 13 is locked, make the M value keep constant.
When the gap width that free clearance setting value and vehicle bridge break needs occur does not match, when " toning " or " less stress " takes place, can be under situation about not dismantling, automatically adjusting the arm outside easily, regulate adjusting screw 13, after making free clearance setting value M suitable, adjusting screw 13 is locked, make the M value keep constant just passable with locking nut 14 and spring washer 15.Use the utility model automatic reglation arm for braking gap, do not need mounting bracket, about being regardless of, very convenient when on automobile, installing.When the wheel cylinder center is equipped with skew with adjustment arm installation position, only to adopt the U type fork of different offsets, it is general constant adjusting arm.
The following describes the working procedure of the utility model automatic reglation arm for braking gap.
The brake stroke: the wheel cylinder push rod is overhanging, promote to adjust arm housing 4 when the brake direction is rotated by U type fork 10, rise through second flat-headed pin, 12 pulling connecting rods 8, the top of overlapping 7 mounting holes because of screw drives on the adjustment arm housing 4 is porose spacing with jump ring 9, by connecting rod 8, rivet 16, the connecting rod assembly of forming with universal joint cross 17 spurs through driving straight pin 6, make screw drives cover 7 move axially 0.5～1mm, inner cone tooth on its lower end surface is thrown off, and can only rotate, and the worm shaft 1 of this moment does not rotate, therefore, the inner cone tooth that screw drives is overlapped on 7 lower end surfaces just produces " a surmounting " angular displacement with respect to the outer cone tooth on the worm shaft 1, thereby has noted the excessive wear gap width in the vehicle bridge break.As shown in Figure 1 and Figure 2, the utility model automatic reglation arm for braking gap one-way element to move axially apart from δ be 0.5～1mm.
Brake backhaul: contract in the wheel cylinder push rod, oppositely promote to adjust arm housing 4 when the releasing of brake direction is rotated by U type fork 10, promoting connecting rod 8 through second flat-headed pin 12 descends, by connecting rod 8, rivet 16, the connecting rod assembly of forming with universal joint cross 17 promotes downwards through driving straight pin 6, make screw drives cover 7 move axially 0.5～1mm downwards, make inner cone tooth on its lower end surface and the outer cone indented joint on the worm shaft 1 earlier, straight pin 6 continues to promote downwards, screw drives cover 7 can only continue to rotate, drive worm shaft 1 synchronously through the awl tooth, worm screw 5 is rotated to the direction that reduces braking gap, thereby realizes that continuously automatic compensation is (as Fig. 3, shown in Figure 4).
Owing to adopt awl tooth clutch-double spiral groove to drive, in the brake stroke, inside and outside awl tooth is separated, has only the rotation of double helix driving casing, and in the brake backhaul, inside and outside awl tooth is forced engagement under the connecting rod pushing, promotes the worm screw rotation simultaneously, guarantees that Wimble tooth-like clutch has long working life and functional reliability.Adopt to drive straight pin and in double spiral groove, promote the double helix driving casing, can make adjust arm housing and be regardless of about, general exchange,, convenient when on automobile, installing as the installation hand regulation arm without any need for mounting bracket.Can make it to be complementary adjusting the arm housing external setting-up and regulating the free clearance setting value, reach the purpose of elimination " toning " or " less stress " with the gap width of vehicle bridge break actual demand.
Claims (6)
1. automatic reglation arm for braking gap, comprise and adjust arm housing (4) and be placed in one worm screw (5) that is used to drive the vehicle bridge break and the worm gear that is meshed with it, and the U type fork (10) that drives the worm shaft (1) of described worm screw (5) rotation and be used for linking to each other with the wheel cylinder push rod, it is characterized in that: described adjustment arm housing (4) is hinged by first flat-headed pin (11) with described U type fork (10), the upper end of described adjustment arm housing (4) inner chamber is equipped with and is used for the one-way element of compensation automatically, described worm screw (5) and worm shaft (1) are installed in the lower end of described adjustment arm housing (4) inner chamber, and the upper-end surface of described worm shaft (1) is provided with the outer cone tooth of using as clutch; Described one-way element comprises double helix driving casing (7) and connecting rod (8), described double helix driving casing (7) cylndrical surface is provided with two symmetries and connects the right-hand screw groove of body, be provided with spacing hole jump ring (9) in the adjustment arm housing (4) of described screw drives cover (7) top, described double helix driving casing (7) lower end surface is provided with the inner cone tooth of using as clutch that matches with described worm shaft (1) upper-end surface outer cone tooth; Described connecting rod (8) upper end is hinged with the arm end of described U type fork (10) by second flat-headed pin (12), and the lower end is equipped with and is driven straight pin (6), and the two ends of described driving straight pin (6) place two spiral chutes of described screw drives cover (7) respectively; Described connecting rod (8) stretches out above described adjustment arm housing (4), its upper end is provided with axial screw thread hole and perpendicular crossing radially long arc shape hole (19), adjusting screw (13) is installed in the described axial screw thread hole, and with locking device locking, the formation braking gap free adjustment gap, gap between described adjusting screw (13) and described second flat-headed pin (12).
2. automatic reglation arm for braking gap according to claim 1 is characterized in that: the distance that moves axially of wherein said one-way element is δ=0.5～1mm.
3. automatic reglation arm for braking gap according to claim 1 and 2, it is characterized in that: wherein said connecting rod (8) lower end is connected with universal joint cross (17) by rivet (16), and described driving straight pin (6) level is installed in the bottom of described universal joint cross (17).
4. automatic reglation arm for braking gap according to claim 3 is characterized in that: wherein said locking device is locking nut (14) and spring washer (15).
5. automatic reglation arm for braking gap according to claim 4 is characterized in that: flexible enclosure (18) is equipped with in the upper end of wherein said adjustment arm housing (4).
6. automatic reglation arm for braking gap according to claim 5 is characterized in that: axle jump ring (2) and following dirt-proof boot (3) are equipped with in wherein said worm shaft (1) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201039470U CN201050567Y (en) | 2007-03-23 | 2007-03-23 | Automatic regulation arm for braking gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201039470U CN201050567Y (en) | 2007-03-23 | 2007-03-23 | Automatic regulation arm for braking gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201050567Y true CN201050567Y (en) | 2008-04-23 |
Family
ID=39337054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201039470U Expired - Fee Related CN201050567Y (en) | 2007-03-23 | 2007-03-23 | Automatic regulation arm for braking gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201050567Y (en) |
Cited By (1)
| 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 |
-
2007
- 2007-03-23 CN CNU2007201039470U patent/CN201050567Y/en not_active Expired - Fee Related
Cited By (2)
| 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 |
| 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 |
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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: 20080423 Termination date: 20100323 |