CN205047715U - Car braking clearance automatic adjustment arm - Google Patents
Car braking clearance automatic adjustment arm Download PDFInfo
- Publication number
- CN205047715U CN205047715U CN201520812469.5U CN201520812469U CN205047715U CN 205047715 U CN205047715 U CN 205047715U CN 201520812469 U CN201520812469 U CN 201520812469U CN 205047715 U CN205047715 U CN 205047715U
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- CN
- China
- Prior art keywords
- gear
- worm
- sleeve
- adjusting
- torsion spring
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- Expired - Fee Related
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Abstract
The utility model discloses a car braking clearance automatic adjustment arm, be provided with worm gear mechanism in the inner chamber of its casing, characterized by still is provided with main drive gear coaxial with the worm wheel and the movable fit in the inner chamber, the driving gear is connected with car brake chamber support through the connecting piece, carry out transmission through spring clutch with the initiative helical gear with the driven gear of main drive gear meshing, initiative helical gear and setting are at the epaxial passive spiral gear engagement of worm, passive helical gear carries out the transmission through adjusting sleeve and transmission cover with the worm axle. The utility model provides a problem of braking hysteresis, off tracking and the braking distance overlength that can not in time cause because of manual regulation braking clearance, can realize convenient hand adjustment and automatic two -way adjustment and locking function to can change the settlement gap length at any time, application scope is wide, and can effective increase of service life.
Description
Technical field
The utility model relates to automobile braking gap adjusting device, is more particularly a kind of arm for adjusting automobile brake clearance automatically.
Background technique
Brake shoe in running break and normal, a rational minimum clearance will be left between brake drum, i.e. brake clearance, to ensure the braking effect of break the best, but this gap can because of the use of break, the wearing and tearing of shoe plate and increasing gradually, four-wheel gap can not remain on an equal basis, causes the generation of the phenomenons such as braking retardation, sideslip, poor stop, bring hidden danger to driving, even cause traffic accident.Therefore, the position of brake shoe to be adjusted in time, make the normal clearance that it keeps between brake drum.The brake clearance regulating mechanism that the current lorry in domestic various model, trailer and passenger vehicle fill is manual adjusting device mostly.Artificial rotation with wrench under car is relied on to adjust arm worm shaft drive worm screw, worm gear and cam axle, make shoe plate near brake drum to eliminate the gap of increase, manual defect to obtain timely adjustment, because brake the wearing and tearing of generation at any time, and manually adjust and can not carry out at any time, need carry out the time-consuming again accurate quick that effort wants to adjust in addition during artificial adjustment operation under car also needs veteran etc.
Some developed countries have automatic adjusting arm technology, but its complex structure, requirement on machining accuracy are high, expensive, the problem that cannot lock the gap after hand adjustment once automatic regulating function lost efficacy also is there is in some technology, this situation obviously can affect traffic safety, simultaneously cannot carry out Iterim Change mate with break in using process as run into that the gap of setting is undesirable, adaptability can not meet the demands.
Model utility content
The utility model is the deficiency for avoiding existing for above-mentioned prior art, a kind of arm for adjusting automobile brake clearance automatically is provided, to realize hand adjustment easily and automatic bidirectional adjustment and lock function, and can realize changing setting gap length at any time, to expand Applicable scope and to increase the service life.
The utility model is that technical solution problem adopts following technological scheme:
The utility model arm for adjusting automobile brake clearance automatically has housing, the arm end of housing is provided with air-leg, worm gear and the worm screw with worm gear is provided with in the inner chamber of housing, there is spline axis hole at the center of worm gear, worm shaft and worm screw stationary fit, the first end of worm shaft is provided with axle sleeve and locking nut.
Structural feature of the present utility model is, coaxial with worm gear and the dynamic main drive gear coordinated also is provided with in the inner chamber of described housing, the end face of described main drive gear is fluted, be flexibly connected with the convex key of connecting sleeve with described groove, described flexible connection refers to and leave running clearance between main drive gear and connecting sleeve, the first end of connecting sleeve and the first end of control panel are fixed and are riveted, second end of control panel is connected by connecting plate with automobile brake chamber support with attaching nut by connecting bolt, main drive gear is meshed with driven gear, driven gear is fixedly connected with the first axle head of clutch shaft, the first end of brake spring is sleeved on the first end of clutch shaft with interference fit, one section of axle interference fit that second end of brake spring and the first end of initiatively spiral gear connect firmly, clutch shaft runs through the center hole of initiatively spiral gear, the clutch shaft at the second end endface position place of active spiral gear fixes and has axle snap ring, described axle snap ring is utilized to limit the axial position of driven gear and active spiral gear, draw-in groove is utilized to connect the first end of power-assisted torsion spring at the second end of described clutch shaft, second end of power-assisted torsion spring is connected on torsion spring set, the outer peripheral surface of torsion spring set coordinates for dynamic with housing, the inner peripheral surface of torsion spring set coordinates with clutch shaft is dynamic, utilizes the jackscrew on housing can limit the rotation of described torsion spring set, initiatively spiral gear is meshed with the passive spiral gear be arranged on worm shaft, the first end of passive spiral gear has the first end dovetail groove clamping of convex key and adjusting sleeve, and reserved running clearance, stage clip is provided with in adjusting sleeve, the excircle of adjusting sleeve is provided with screw thread and is threaded with adjusting nut, second end of adjusting sleeve has keyway and is axially flexibly connected with the key in drive sleeve on its outer peripheral surface, utilizes described stage clip to make adjusting nut be butted on the first end face of drive sleeve, second end of described drive sleeve is fixedly connected with the second end of worm shaft.
The structural feature of the utility model arm for adjusting automobile brake clearance automatically is also: be fixedly connected with hexagonal cap at the second end of described worm shaft, and the second end face arranging described drive sleeve is interior six aspects, and matches with the hexagonal cap of the second end being located at worm shaft; Described drive sleeve is pushed away to adjusting nut side and drive sleeve can be made to depart from hexagonal cap coordinate.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the utility model solve often can not cause in time because of artificial adjustment brake clearance for a long time braking retardation, sideslip, poor stop problem, make up the deficiency of existing automatic adjusting arm, traffic safety is had reliable guarantee, also mitigates the work load driving, repair personnel simultaneously.
2, the utility model can realize hand adjustment easily and automatic bidirectional adjustment and lock function, and can realize at any time change set gap length, expand Applicable scope, and can increase the service life.
3, the utility model can replace former hand regulation arm completely, and have and automatically and very easily manually adjust auto-lock function, and the size that can change former setting gap at any time meets the needs of various parameter break coupling, can widely use on various air brake vehicle.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the A-A sectional drawing of Fig. 1;
Number in the figure: 1 housing, 2 worm screws, 3 worm shafts, 4 passive spiral gears, 5 adjusting nuts, 6 drive sleeve keys, 7 drive sleeve, 8 hexagonal caps, 9 adjusting sleeves, 10 stage clips, 11 active spiral gears, 12 worm gears, 13 control panels, 14 axle sleeves, 15 locking nuts, 16 dust covers, 17 backboards, 18 torsion spring sets, 19 axle snap rings, 20 power-assisted torsion springs, 21 packing rings, 22 connecting sleeves, 23 main drive gears, 24 driven gears, 25 clutch shafts, 26 brake springs, 27 connecting plates, 28 connecting bolts, 29 attaching nuts, 30 jackscrews, 31 air-legs, 32 end caps.
Embodiment
See Fig. 1 and Fig. 2, in the present embodiment, arm for adjusting automobile brake clearance automatically has housing 1, the arm end of housing 1 is provided with air-leg 31, the worm screw 2 being provided with worm gear 12 in the inner chamber of housing 1 and coordinating with worm gear 12, there is spline axis hole at the center of worm gear 12, worm shaft 3 and worm screw 2 stationary fit, the first end of worm shaft 3 is provided with axle sleeve 14 and locking nut 15, and has dust cover 16 to carry out shutoff.
As depicted in figs. 1 and 2, in the present embodiment, by backboard 17, coaxial with the worm gear 12 and dynamic main drive gear 23 coordinated also is provided with in the inner chamber of the housing 1 that end cap 32 and packing ring 21 are closed, the end face of main drive gear 23 is fluted, be flexibly connected with the convex key of connecting sleeve 22 with groove, flexible connection refers to and leave running clearance between main drive gear 23 and connecting sleeve 22, the first end of connecting sleeve 22 and the first end of control panel 13 are fixed and are riveted, second end of control panel 13 is connected by connecting plate 27 with automobile brake chamber support with attaching nut 29 by connecting bolt 28, main drive gear 23 is meshed with driven gear 24, driven gear 24 is fixedly connected with the first axle head of clutch shaft 25, the first end of brake spring 26 is sleeved on the first end of clutch shaft 25 with interference fit, one section of axle interference fit that second end of brake spring 26 and the first end of initiatively spiral gear 11 connect firmly, clutch shaft 25 runs through the center hole of initiatively spiral gear 11, the clutch shaft 25 at the second end endface position place of active spiral gear 11 fixes and has axle snap ring 19, axle snap ring 19 is utilized to limit the axial position of driven gear 24 and active spiral gear 11, spring clutch is formed with this, draw-in groove is utilized to connect the first end of power-assisted torsion spring 20 at the second end of clutch shaft 25, second end of power-assisted torsion spring 20 is connected on torsion spring set 18, the outer peripheral surface of torsion spring set 18 coordinates for dynamic with housing 1, the inner peripheral surface of torsion spring set 18 coordinates for dynamic with clutch shaft 25, utilize the jackscrew 30 on housing 1 can limit the rotation of torsion spring set 18, initiatively spiral gear 11 is meshed with the passive spiral gear 4 be arranged on worm shaft 3, the first end of passive spiral gear 4 has the first end dovetail groove clamping of convex key and adjusting sleeve 9, and reserved running clearance, the notch of dovetail groove is towards passive spiral gear 4 side, and slot opening bottom land is narrow, change the axial position between adjusting sleeve 9 and passive spiral gear 4, the size of the running clearance in convex key on the first end of passive spiral gear 4 dovetail groove in adjusting sleeve 9 can be changed, stage clip 10 is provided with in adjusting sleeve 9, the excircle of adjusting sleeve 9 is provided with screw thread and is threaded with adjusting nut 5, second end of adjusting sleeve 9 has axial keyway and is axially flexibly connected with the drive sleeve key 6 in drive sleeve 7 on its outer peripheral surface, utilize coordinating of the drive sleeve key 6 in drive sleeve 7 and the axial keyway in adjusting sleeve 9, make adjusting sleeve 9 can drive the rotation of drive sleeve 7, stage clip 10 is utilized to make adjusting nut 5 be butted on the first end face of drive sleeve 7, second end of drive sleeve 7 is fixedly connected with the second end of worm shaft 3.
In concrete enforcement, be fixedly connected with hexagonal cap 8 at the second end of worm shaft 3, the second end face arranging drive sleeve 7 is interior six aspects, and matches with the hexagonal cap 8 of the second end being located at worm shaft 3, and the rotation of drive sleeve 7 is passed to worm shaft 3 by hexagonal cap 8; Drive sleeve 7 is pushed to adjusting nut 5 side, drive sleeve 7 can be made to depart from hexagonal cap 8 and coordinate, drive sleeve 7 and hexagonal cap 8 depart from coordinate time, manual rotation's hexagonal cap 8 can realize manual adjustment.
In the present embodiment, the effect of brake spring is; When driven gear 24 and clutch shaft 25 together rotate against the Hand of spiral of brake spring 26, brake spring 26 internal diameter becomes ambassador's active spiral gear 11 and realizes being separated with clutch shaft 25; When driven gear 24 rotates along the Hand of spiral of brake spring 26, brake spring 26 internal diameter diminishes and makes initiatively spiral gear 11 and clutch shaft 25 together rotate thus drive passive spiral gear 4 to rotate, and further by drive sleeve 7 and hexagonal cap 8, worm shaft 3 is together rotated to have carried out automatic adjustment; Rotate the axial position that adjusting nut 5 can change the convex key of dovetail groove and passive spiral gear 4 first end in adjusting sleeve 9, the running clearance reserved is made to become large or diminish therebetween, the size after the setting of original brake clearance is changed with this, this function can expand the accommodation of product and break parameter matching, and can working life of proper extension automatic adjusting arm.
In the present embodiment the groove of main drive gear 23 connect with connecting sleeve 22 epirelief key after the running clearance that reserves control panel and connecting sleeve 22 can be made can first to dally when transmission main drive gear 23 rotates several angle, utilize this idle angular to ensure the normal brake application gap reserved not adjusted.
When brake clearance normal brake application, braking air chamber push rod 30 promotes adjustment arm and drives brake camshaft to turn right by worm gear 12, make the cam jack-up brake shoe in break, friction brake drum realizes braking, now, the corner turned right due to adjustment arm is very little, be equal to the gap corner reserved after main drive gear 23 upper groove is connected with connecting sleeve 22 epirelief key, therefore, main drive gear 23 does not have transmission driven gear 24, therefore produce with active spiral gear 11 and be separated rotation phenomenon, regulating mechanism is not recorded to wearing clearance.
When brake clearance is braked greatly because of shoe plate wearing and tearing change, due to the corner also corresponding increase that adjustment arm turns right with brake camshaft, exceed the interstice coverage reserved between connecting sleeve 22 epirelief key and main drive gear 23 upper groove, main drive gear 23 is made to drive driven gear 24 to turn right when turning left, driven gear 24 is separated and the several angle that dallies with active spiral gear 11 when turning right, this angle is the gap corner after the shoe plate wearing and tearing be recorded to, now; Because driven gear 24 makes power-assisted torsion spring 20 be able to Chu Li with turning right of clutch shaft 25, regulating mechanism is in preparation adjustment state.
When brake off, adjustment arm to turn left return with brake camshaft simultaneously, when being back to midway break elasticity loss and occurring normal clearance, connecting sleeve 22 has gone back to the gap corner that reserves between its convex key and main drive gear 23 upper groove to the right and has not been transferred to main drive gear 23, and regulating mechanism does not work.When adjusting arm and continuing under the effect of brake chamber spring to initial point return, when forcing main drive gear 23 to drive driven gear 24 to turn left, so, driven gear 24 is by brake spring 26 successively transmission initiatively spiral gear 11, passive spiral gear 4 and drive sleeve 7, worm shaft 3 is together turned an angle, now, worm shaft 3 drives worm screw 2, worm gear 12 and brake camshaft also again to turn an angle successively, make cam jack-up shoe plate in break near brake drum, have adjusted the gap of wearing and tearing increase with this, realize self-adjusting object.
Claims (2)
1. an arm for adjusting automobile brake clearance automatically, there is housing (1), the arm end of housing (1) is provided with air-leg (31), the worm screw (2) being provided with worm gear (12) in the inner chamber of housing (1) and coordinating with worm gear (12), there is spline axis hole at the center of worm gear (12), worm shaft (3) and worm screw (2) stationary fit, the first end of worm shaft (3) is provided with axle sleeve (14) and locking nut (15), it is characterized in that, coaxial with worm gear (12) and the dynamic main drive gear (23) coordinated also is provided with in the inner chamber of described housing (1), the end face of described main drive gear (23) is fluted, be flexibly connected with the convex key of described groove with connecting sleeve (22), described flexible connection refers to and leave running clearance between main drive gear (23) and connecting sleeve (22), the first end of connecting sleeve (22) and the first end of control panel (13) are fixed and are riveted, second end of control panel (13) is connected by connecting plate (27) with automobile brake chamber support with attaching nut (29) by connecting bolt (28), main drive gear (23) is meshed with driven gear (24), driven gear (24) is fixedly connected with the first axle head of clutch shaft (25), the first end of brake spring (26) is sleeved on the first end of clutch shaft (25) with interference fit, one section of axle interference fit that second end of brake spring (26) and the first end of initiatively spiral gear (11) connect firmly, clutch shaft (25) runs through the center hole of initiatively spiral gear (11), the upper fixing of clutch shaft (25) at the second end endface position place of active spiral gear (11) has axle snap ring (19), described axle snap ring (19) is utilized to limit the axial position of driven gear (24) and active spiral gear (11), draw-in groove is utilized to connect the first end of power-assisted torsion spring (20) at the second end of described clutch shaft (25), second end of power-assisted torsion spring (20) is connected on torsion spring set (18), the outer peripheral surface of torsion spring set (18) coordinates for dynamic with housing (1), the inner peripheral surface of torsion spring set (18) coordinates with clutch shaft (25) is dynamic, utilize the jackscrew (30) on housing (1) that the rotation of described torsion spring set (18) can be limited, initiatively spiral gear (11) is meshed with the passive spiral gear (4) be arranged on worm shaft (3), the first end of passive spiral gear (4) has the first end dovetail groove clamping of convex key and adjusting sleeve (9), and reserved running clearance, stage clip (10) is provided with in adjusting sleeve (9), the excircle of adjusting sleeve (9) is provided with screw thread and is threaded with adjusting nut (5), second end of adjusting sleeve (9) has keyway and is axially flexibly connected with the key in drive sleeve (6) on its outer peripheral surface, described stage clip (10) is utilized to make adjusting nut (5) be butted on the first end face of drive sleeve (6), second end of described drive sleeve (6) is fixedly connected with the second end of worm shaft (3).
2. arm for adjusting automobile brake clearance automatically according to claim 1, it is characterized in that: be fixedly connected with hexagonal cap (8) at the second end of described worm shaft (3), the second end face arranging described drive sleeve (6) is interior six aspects, and matches with the hexagonal cap (8) of the second end being located at worm shaft (3); Described drive sleeve (6) is pushed away to adjusting nut (5) side and drive sleeve (6) can be made to depart from hexagonal cap (8) coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520812469.5U CN205047715U (en) | 2015-10-16 | 2015-10-16 | Car braking clearance automatic adjustment arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520812469.5U CN205047715U (en) | 2015-10-16 | 2015-10-16 | Car braking clearance automatic adjustment arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205047715U true CN205047715U (en) | 2016-02-24 |
Family
ID=55341296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520812469.5U Expired - Fee Related CN205047715U (en) | 2015-10-16 | 2015-10-16 | Car braking clearance automatic adjustment arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205047715U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156524A (en) * | 2015-10-16 | 2015-12-16 | 合肥顺为汽车零部件有限公司 | Automobile brake clearance automatically-adjusting arm |
-
2015
- 2015-10-16 CN CN201520812469.5U patent/CN205047715U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156524A (en) * | 2015-10-16 | 2015-12-16 | 合肥顺为汽车零部件有限公司 | Automobile brake clearance automatically-adjusting arm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20211016 |