CN205371407U - Car braking clearance automatic adjustment arm - Google Patents
Car braking clearance automatic adjustment arm Download PDFInfo
- Publication number
- CN205371407U CN205371407U CN201620155559.6U CN201620155559U CN205371407U CN 205371407 U CN205371407 U CN 205371407U CN 201620155559 U CN201620155559 U CN 201620155559U CN 205371407 U CN205371407 U CN 205371407U
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- gear
- helical gear
- worm
- shaft
- housing
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- Withdrawn - After Issue
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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 the 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
This utility model relates to automobile braking gap adjusting device, more specifically a kind of arm for adjusting automobile brake clearance automatically.
Background technology
A minimum clearance normal, rational is left between shoe brake and brake drum in running brake, i.e. brake clearance, the braking effect best to ensure brake, but this gap can because of the use of brake, the abrasion of shoe plate and be gradually increased, 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 vehicle accident.Therefore, the position of shoe brake to be adjusted in time so that it is maintenance and the normal clearance between brake drum.The brake clearance guiding mechanism filled on the lorry of domestic various models, trailer and passenger vehicle at present 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, manually it has the drawback that and can not obtain timely adjustment, because braking the abrasion of generation at any time, and manually adjust and can not carry out at any time, the time-consuming again accurate quick that effort wants to adjust need to be carried out when additionally manually adjusting operation under car and also need to veteran etc..
Some developed countries have automatic adjusting arm technology, but its structure is complicated, requirement on machining accuracy is high, expensive, some technology there is also the problem that the gap after hand adjustment cannot be locked once automatic regulating function lost efficacy, this situation obviously can affect traffic safety, simultaneously mate in use procedure with brake, as run into, the gap of setting is undesirable cannot be carried out Iterim Change, adaptability can not meet requirement and time-consuming changing when shoe plate amplifies brake clearance, effort, change shoe plate also can cause the early stage excessive wear of inner body to cause the shortening in service life simultaneously when tuning up brake clearance.
Utility model content
This utility model is for avoiding the weak point existing for above-mentioned prior art, a kind of arm for adjusting automobile brake clearance automatically is provided, to realizing hand adjustment easily and automatic bidirectional adjustment and lock function, and separation between the parts of easy premature wear can be made in manually adjusting to make it increase the service life without abrasion, and can realize changing at any time setting gap length, to expand the scope of application.
This utility model adopts the following technical scheme that for solving technical problem
This utility model arm for adjusting automobile brake clearance automatically has housing, and the arm end at described housing is provided with air-leg, is provided with worm gear and the worm screw with worm gear in the inner chamber of described housing, and there are spline axis hole, worm shaft and worm screw stationary fit in the center of worm gear；
Being structurally characterized in that of this utility model arm for adjusting automobile brake clearance automatically:
The inner chamber of described housing is additionally provided with coaxial with worm gear and for the dynamic main drive gear coordinated；
Main drive gear is meshed with driven gear, and the medial wall of driven gear has the keyway axial sliding fit of radial convex key and actively the first axle head of helical gear, leaves free gap between the first axle head of driven gear and active helical gear；
First end of brake spring is sleeved in the first end inwall stepped hole of passive helical gear with interference fit, brake spring the second end is sleeved in the first end stepped hole of drive sleeve with interference fit, second end of drive sleeve has taper inner toothed surface, worm shaft is Step Shaft, the step end face of worm shaft is provided with the outer flank of tooth of taper, being meshed with the outer flank of tooth of the taper inner toothed surface of the second end of described drive sleeve and the taper on worm shaft, the first axle head of worm shaft runs through drive sleeve and passive helical gear centre bore and stretches out outside housing；
Actively helical gear coordinates for axially dynamic with actively helical gear shaft, actively the first end of helical gear shaft inserts the centre bore of driven gear, the centre bore of described driven gear is stepped hole, it is provided with stage clip between the first end end face and the step end face of stepped hole of described active helical gear shaft, described stage clip is utilized to keep the axial gap being reserved between driven gear and active helical gear, second end of described active helical gear shaft runs through housing and is inserted in the centre bore adjusting axle sleeve, the axial location of described active helical gear shaft is limited with the hole bottom face of described adjustment axle sleeve；One end of described adjustment axle sleeve convexedly stretches in the second end cap, and the other end is butted on the end face of actively helical gear, and for limiting the axial location of described active helical gear, described adjustment axle sleeve forms adjustable threaded engagement with the female thread structure of its bolt arrangement Yu housing；
Actively helical gear is meshed with the passive helical gear being arranged on worm shaft, it is provided with plane bearing between the second end and the end cap of passive helical gear, described end cap forms threaded engagement with the helicitic texture of its outer circumference surface with the female thread structure of housing, and one end of end cap is butted on the end face at plane bearing；
Second end of worm shaft is provided with spring base, is provided with clutch stage clip in spring base, and clutch stage clip end cap forms threaded engagement with the helicitic texture of its outer circumference surface with the female thread structure on housing；Adjustment bolt is set, first end of described adjustment bolt convexedly stretches in clutch stage clip end cap, the second end adjusting bolt is butted on the second end end face of worm shaft, and the first end at described adjustment bolt is equipped with adjusting nut, rotates described adjusting nut for realizing the clutch of worm shaft and drive sleeve.
The construction features of this utility model arm for adjusting automobile brake clearance automatically lies also in: be provided with groove wide up and down on the end face of described main drive gear, it is flexibly connected with the trapezoidal convex key of adapter sleeve with described groove wide up and down, described flexible connection refers to and leaves running clearance between main drive gear and adapter sleeve, the riveted joint fixing with the first end of panel of first end of adapter sleeve, the second end of panel is connected with automobile brake chamber support with connecting plate by connecting bolt.
Compared with the prior art, this utility model has the beneficial effect that:
1, this utility model solves problem because manually adjusting braking retardation that brake clearance tends not to cause in time, sideslip, poor stop for a long time, make up the deficiency of existing automatic adjusting arm, make traffic safety have reliable guarantee, also mitigate the work load driving, repairing personnel simultaneously.
2, this utility model is capable of hand adjustment easily and automatic bidirectional adjustment and lock function, and can realize changing at any time setting gap length, expands the scope of application, and can increase the service life.
3, this 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 brake coupling, can widely use on various air brake vehicles.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation；
Fig. 2 is the A-A expanded view of Fig. 1；
Number in the figure: 1 housing, 2 worm screws, 3 worm shafts, the outer flank of tooth of 4a taper, 4b taper inner toothed surface, 5 drive sleeve, 6 brake springs, 7 passive helical gears, 8 plane bearings, 9 end caps, 10 worm gears, 11 active helical gears, 12 jackscrews, 13 spring bases, 14 adjust bolt, 15 clutch stage clips, 16 clutch stage clip end caps, 17 adjusting nuts, 18 driven gears, 19 gaps, 20 stage clips, 21 main drive gears, 22 adapter sleeves, 23 first cover plates, 24 panels, 25 connecting bolts, 26 connecting plates, 27 adjust axle sleeve, 28 packing rings, 29 air-legs, 30 air chamber supports, 31 active helical gear shafts, 32 second cover plates.
Detailed description of the invention
Referring to Fig. 1 and Fig. 2, in the present embodiment, arm for adjusting automobile brake clearance automatically has housing 1, and the arm end at housing 1 is provided with air-leg 29, is provided with worm gear 10 and the worm screw 2 coordinated with worm gear 10 in the inner chamber of housing 1, there are spline axis hole, worm shaft 3 and worm screw 2 stationary fit in the center of worm gear 10.
As depicted in figs. 1 and 2, close the inner chamber of the housing 1 formed at the packing ring 28 from first cover plate the 23, second cover plate 32 and the inner side being arranged in the second cover plate 32 and be additionally provided with coaxial with worm gear 10 and for the dynamic main drive gear 21 coordinated.
Main drive gear 21 is meshed with driven gear 18, the medial wall of driven gear 18 has the keyway axial sliding fit of radial convex key and actively the first axle head of helical gear 11, between the first axle head of driven gear 18 and active helical gear 11, leaves free gap 19.
First end of brake spring 6 is sleeved in the first end inwall stepped hole of passive helical gear 7 with interference fit, brake spring 6 second end is sleeved in the first end stepped hole of drive sleeve 5 with interference fit, second end of drive sleeve 5 has taper inner toothed surface 4b, worm shaft 3 is Step Shaft, the step end face of worm shaft 3 is provided with the outer flank of tooth 4a of taper, being meshed with the outer flank of tooth 4a of the taper on worm shaft 3 with the taper inner toothed surface 4b of the second end of drive sleeve 5, the first axle head of worm shaft 3 runs through drive sleeve 5 and passive helical gear 7 centre bore and stretches out outside housing 1.
nullActively helical gear 11 coordinates for axially dynamic with actively helical gear shaft 31，Actively the first end of helical gear shaft 31 inserts the centre bore of driven gear 18，The centre bore of driven gear 18 is stepped hole，It is provided with stage clip 20 between the first end end face and the step end face of stepped hole of active helical gear shaft 31，Stage clip 20 is utilized to keep the axial gap 19 being reserved between driven gear 18 and active helical gear 11，Actively the second end of helical gear shaft 31 runs through housing 1 and is inserted in the centre bore adjusting axle sleeve 27，To adjust the axial location of the hole bottom face restriction actively helical gear shaft 31 of axle sleeve 27，The one end adjusting axle sleeve 27 convexedly stretches in the second cover plate 32，The other end is butted on the end face of actively helical gear 11，For limiting the axial location of actively helical gear 11，Adjust axle sleeve 27 and form adjustable threaded engagement with the female thread structure of its bolt arrangement Yu housing 1；Utilize the jackscrew 12 in housing 1 can limit the rotation adjusting axle sleeve 27.
Actively helical gear 11 is meshed with the passive helical gear 7 being arranged on worm shaft 3, it is provided with plane bearing 8 between second end and end cap 9 of passive helical gear 7, end cap 9 forms threaded engagement with the helicitic texture of its outer circumference surface with the female thread structure of housing 1, and one end of end cap 9 is butted on the end face at plane bearing 8；
Second end of worm shaft 3 is provided with spring base 13, is provided with clutch stage clip 15 in spring base 13, and clutch stage clip end cap 16 forms threaded engagement with the helicitic texture of its outer circumference surface with the female thread structure on housing 1；Adjustment bolt 14 is set, the first end adjusting bolt 14 convexedly stretches in clutch stage clip end cap 16, the second end adjusting bolt 14 is butted on the second end end face of worm shaft 3, is equipped with adjusting nut 17 at the first end adjusting bolt 14, rotates adjusting nut for realizing the clutch of worm shaft 3 and drive sleeve 5.
When needs replacing shoe plate tunes up brake clearance, spanner is utilized to rotate adjusting nut 17, straining clutch stage clip 15 by adjustment bolt 14 with spring base 13 makes the outer flank of tooth 4a of the taper in drive sleeve 5 separate with the taper inner toothed surface 4b on worm shaft 3, make it without abrasion to reduce adjustment moment, extend the service life of automatic adjusting arm.
When passive helical gear 7 rotates along the hand of spiral of brake spring 6, the external diameter of brake spring 6 diminishes and makes actively helical gear 11 realize separating with drive sleeve 5；When passive helical gear 7 is against the hand of spiral rotation of brake spring 6, brake spring 6 external diameter becomes the passive helical gear 7 of ambassador and together rotates with drive sleeve 5 and drive worm shaft 3 to rotate by the outer flank of tooth 4a and taper inner toothed surface 4b of taper, drives worm screw 2 and worm gear 10 together to rotate automatic adjustment with this；Rotate adjustment axle sleeve 27 and can change the actively size of preset clearance 19 between helical gear 11 and driven gear 18, thus changing the size of the brake clearance of setting, this function can expand the subject range that product mates with brake parameter, and can service life of proper extension automatic adjusting arm.
In being embodied as, the end face of main drive gear 21 is provided with groove wide up and down, groove wide under above is flexibly connected with the trapezoidal convex key of adapter sleeve 22, flexible connection refers to and leaves running clearance between main drive gear 21 and adapter sleeve 22, the riveted joint fixing with the first end of panel 24 of first end of adapter sleeve 22, second end of panel 24 is connected with automobile brake chamber support 30 with connecting plate 26 by connecting bolt 25, groove on main drive gear 21 can make panel and adapter sleeve 22 firstly there are an idle angular when transmission main drive gear 21 rotates with the running clearance that the trapezoidal convex key on adapter sleeve 22 reserves after forming connection, the normal brake application gap that idle angular ensures to reserve is utilized not to be adjusted.
When brake clearance normal brake application, braking air-leg 29 promotes adjustment arm to drive brake camshaft to turn right by worm gear 10, make the cam jack-up shoe brake in brake, friction brake drum realizes braking, now, the corner turned right due to adjustment arm is only small, it is equal to the gap corner reserved after main drive gear 21 upper groove is connected with adapter sleeve 22 epirelief key, therefore, main drive gear 21 does not have transmission driven gear 18, therefore not producing to separate rotation phenomenon with active helical gear 11 with drive sleeve 5, guiding mechanism not recorded wearing clearance.
When brake clearance is braked greatly because of shoe plate abrasion change, the corner turned right with brake camshaft owing to adjusting arm also increases accordingly, exceed the interstice coverage reserved between adapter sleeve 22 epirelief key and main drive gear 21 upper groove, main drive gear 21 is made to drive driven gear 18 to turn right when turning left, driven gear 18 drives actively helical gear 11 to separate and the certain angle that dallies with drive sleeve 5 when turning right, this angle is the gap corner after the shoe plate abrasion that recorded, when brake force increases brake drum generation elastic deformation；Worm shaft 3 and worm screw 2 are moved to the left compression spring 5 simultaneously and make the taper flank of tooth simultaneous interpretation on worm shaft 3 move the flank of tooth on set 4 to separate and make drive sleeve 5 brake spring 3 together dally an angle with passive helical gear 18, thus the elastic angle of brake is not recorded, and guiding mechanism is in preparation adjustment state.
When releasing braking, adjust arm to turn left with brake camshaft return simultaneously, when being back to midway brake elasticity loss, the release of spring 5 elastic force presses worm screw 2 worm shaft 3 and moves right and make the taper flank of tooth in drive sleeve 5 engage with the flank of tooth on worm shaft 3, when corner gap between adjusting arm and being rotated further to the right and occur normally, adapter sleeve 22 has gone back to the right the gap corner reserved between its convex key and main drive gear 21 upper groove without being transferred to main drive gear 21, and guiding 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 21 to drive driven gear 18 to turn left, then, driven gear 18 is by transmission actively helical gear 11, passive helical gear 7 and drive sleeve 5, worm shaft 3 is made together to turn an angle, now, worm shaft 3 drives worm screw 2, worm gear 10 and brake camshaft also again to turn an angle successively, make the cam jack-up shoe plate in brake near brake drum, the gap that abrasion increases is have adjusted, it is achieved the purpose automatically adjusted with this.
Claims (2)
1. an arm for adjusting automobile brake clearance automatically, there is housing (1), arm end at described housing (1) is provided with air-leg (29), the inner chamber of described housing (1) is provided with worm gear (10) and the worm screw (2) coordinated with worm gear (10), there are spline axis hole, worm shaft (3) and worm screw (2) stationary fit in the center of worm gear (10)；It is characterized in that:
The inner chamber of described housing (1) is additionally provided with coaxial with worm gear (10) and for the dynamic main drive gear (21) coordinated；
Main drive gear (21) is meshed with driven gear (18), the medial wall of driven gear (18) has the keyway axial sliding fit of radial convex key and actively the first axle head of helical gear (11), between the first axle head of driven gear (18) and active helical gear (11), leaves free gap (19)；
First end of brake spring (6) is sleeved in the first end inwall stepped hole of passive helical gear (7) with interference fit, brake spring (6) second end is sleeved in the first end stepped hole of drive sleeve (5) with interference fit, second end of drive sleeve (5) has taper inner toothed surface (4b), worm shaft (3) is Step Shaft, the step end face of worm shaft (3) is provided with the outer flank of tooth (4a) of taper, it is meshed with the outer flank of tooth (4a) of the taper inner toothed surface (4b) of the second end of described drive sleeve (5) and the taper on worm shaft (3), first axle head of worm shaft (3) runs through drive sleeve (5) and passive helical gear (7) centre bore and stretches out housing (1) outward；
Actively helical gear (11) coordinates for axially dynamic with actively helical gear shaft (31), actively the first end of helical gear shaft (31) inserts the centre bore of driven gear (18), the centre bore of described driven gear (18) is stepped hole, it is provided with stage clip (20) between the first end end face and the step end face of stepped hole of described active helical gear shaft (31), described stage clip (20) is utilized to keep the axial gap (19) being reserved between driven gear (18) and active helical gear (11), second end of described active helical gear shaft (31) runs through housing (1) and is inserted in the centre bore adjusting axle sleeve (27), the axial location of described active helical gear shaft (31) is limited with the hole bottom face of described adjustment axle sleeve (27)；One end of described adjustment axle sleeve (27) convexedly stretches in the second end cap (32), the other end is butted on the end face of actively helical gear (11), for limiting the axial location of described active helical gear (11), described adjustment axle sleeve (27) forms adjustable threaded engagement with the female thread structure of its bolt arrangement Yu housing (1)；
Actively helical gear (11) is meshed with the passive helical gear (7) being arranged on worm shaft (3), it is provided with plane bearing (8) between second end and end cap (9) of passive helical gear (7), described end cap (9) forms threaded engagement with the helicitic texture of its outer circumference surface with the female thread structure of housing (1), and one end of end cap (9) is butted on the end face in plane bearing (8)；
Second end of worm shaft (3) is provided with spring base (13), being provided with clutch stage clip (15) in spring base (13), clutch stage clip end cap (16) forms threaded engagement with the helicitic texture of its outer circumference surface with the female thread structure on housing (1)；Adjustment bolt (14) is set, first end of described adjustment bolt (14) convexedly stretches in clutch stage clip end cap (16), the second end adjusting bolt (14) is butted on the second end end face of worm shaft (3), the first end described adjustment bolt (14) is equipped with adjusting nut (17), rotates the clutch that described adjusting nut is used for realizing worm shaft (3) with drive sleeve (5).
2. arm for adjusting automobile brake clearance automatically according to claim 1, it is characterized in that: on the end face of described main drive gear (21), be provided with groove wide up and down, it is flexibly connected with the trapezoidal convex key of described groove wide up and down with adapter sleeve (22), described flexible connection refers to and leaves running clearance between main drive gear (21) and adapter sleeve (22), first end of adapter sleeve (22) is fixing riveted joint with the first end of panel (24), second end of panel (24) is connected with automobile brake chamber support (30) with connecting plate (26) by connecting bolt (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620155559.6U CN205371407U (en) | 2016-03-01 | 2016-03-01 | Car braking clearance automatic adjustment arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620155559.6U CN205371407U (en) | 2016-03-01 | 2016-03-01 | Car braking clearance automatic adjustment arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205371407U true CN205371407U (en) | 2016-07-06 |
Family
ID=56272277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620155559.6U Withdrawn - After Issue CN205371407U (en) | 2016-03-01 | 2016-03-01 | Car braking clearance automatic adjustment arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205371407U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545997A (en) * | 2016-03-01 | 2016-05-04 | 合肥顺为汽车零部件有限公司 | Automatic adjusting arm for automobile brake clearance |
-
2016
- 2016-03-01 CN CN201620155559.6U patent/CN205371407U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545997A (en) * | 2016-03-01 | 2016-05-04 | 合肥顺为汽车零部件有限公司 | 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 | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160706 Effective date of abandoning: 20190521 |
|
| AV01 | Patent right actively abandoned |