CN101173701A - Arm for automatically regulating clearance of brake of automobile - Google Patents
Arm for automatically regulating clearance of brake of automobile Download PDFInfo
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- CN101173701A CN101173701A CNA2007100555293A CN200710055529A CN101173701A CN 101173701 A CN101173701 A CN 101173701A CN A2007100555293 A CNA2007100555293 A CN A2007100555293A CN 200710055529 A CN200710055529 A CN 200710055529A CN 101173701 A CN101173701 A CN 101173701A
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- arm
- clutch
- spiral gear
- spring
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Abstract
The invention relates to an automatic adjusting lever for the automobile brake clearance, comprising a casing, wherein, a wormgear and a worm shaft are arranged in the casing; a big spring, a spring base and an adjusting blind nut are arranged at one end of the worm shaft; a gear-type overrunning clutch is sleeved on the worm shaft; the passive spiral gear of the gear-type overrunning clutch is meshed with the active spiral gear of a clearance control device; the clearance control device comprises a planet gear, a gear shaft, and a active spiral gear; a damping mechanism which comprises an adjusting screw, a spring, and a steel bead, is arranged at the left end of the active spiral gear; a control lever component is arranged in the wormgear hole coaxially with the wormgear, and comprises a central gear, a gear-type joint sleeve, a cover plate and a control lever, wherein, the central gear is arranged in the wormgear hole coaxially with the wormgear and is meshed with the planet gear.
Description
Technical field
The invention belongs to the automobile brake technical field, is a kind of arm for adjusting automobile brake clearance automatically that is used to adopt drum brake.
Background technique
In vehicle traveling process, owing to use break abrupt deceleration vehicle, the normal wear between brake drum and the friction plate that the gap can be become greatly gradually continually, cause braking retardation, period of braking prolongs; Especially when the brake clearance of each brake drum was inconsistent, phenomenons such as the braking deviation that takes place when car brakeing, sideslip were for traffic safety is brought some hidden danger.
For this phenomenon, at present, general all employings are the method for adjustment manually, uses spanner rolling brake gap to adjust the worm shaft of arm, and worm shaft drives worm gear, thereby the camshaft that drive is connected with worm gear is realized the purpose to the adjustment of break brake clearance.Owing to adjust the different of the frequency and peopleware, be difficult to accomplish that automobile remains good working order, thereby influence the safety traffic of automobile.
At present, adopt arm for automatically regulating clearance of brake, can at any time the brake clearance that increases be adjusted in the scope in normal brake application gap; Because the kind of automatic clearance adjuster is more at present, and has nothing in common with each other with the break ways of connecting, bring many inconvenience for the maintenance and the exchange of the automatic clearance adjuster of different cultivars.Especially the installation of the automatic clearance adjuster of gear ﹠ rack structure is subjected to structural limitations, control arm must be fixed on the accurate position of breach control panel starting point when mounted, otherwise phenomenons such as control arm compensation rate deficiency or inefficacy can occur.Therefore, very high to the accuracy requirement of mounting point, bring difficulty for production and maintenance.
Summary of the invention
The objective of the invention is provides a kind of arm for adjusting automobile brake clearance automatically of novel structure in order to overcome the deficiencies in the prior art.That this structure has is rational in infrastructure, easy for installation, stability high, can characteristics be installed in the whole circumference scope of camshaft center line etc.
For achieving the above object, the present invention adopts following technical proposal to realize: this arm for adjusting automobile brake clearance automatically comprises a housing, and worm gear and worm shaft are housed in the housing, and worm gear and worm shaft adopt the unidirectional tooth engagement of asymmetric profile of tooth pressure angle; One end of worm shaft is provided with big spring, spring seat and adjustment blind nut; It is characterized in that on the diameter of axle of described worm shaft also flute profile free wheel device of socket;
The passive spiral gear of flute profile free wheel device is meshed with the active spiral gear of gap control device, and described passive spiral gear is 45 ° with the helix angle of active spiral gear, and their spin axis is orthogonal; Be provided with the initiatively rotation of spiral gear of damping mechanism control in the gap control device; The control arm assembly coaxial with worm gear is housed in worm wheel aperture, and the sun gear in the control arm assembly is meshed with the planet wheel of gap control device.
Comprise passive spiral gear, clutch moving plate, clutch stator, spring and the check ring that is installed on the sleeve at above-mentioned flute profile free wheel device; Check ring in the flute profile free wheel device is stuck in the circular groove of sleeve external cylindrical surface and clutch stator cylindrical hole, and clutch stator and sleeve are fixed together, and other parts are enclosed on the sleeve, becomes a relatively independent assembly;
In above-mentioned arm for adjusting automobile brake clearance automatically, under the effect of the spring force of big spring, the awl tooth in the awl tooth on described flute profile free wheel device stator right side and worm shaft left side is in normal engagement, forms Wimble tooth-like clutch;
In above-mentioned arm for adjusting automobile brake clearance automatically, be provided with thrust bearing between the left side of described flute profile overrunning clutch sleeve and the adjustment blind nut with holes.
In above-mentioned arm for adjusting automobile brake clearance automatically, described gap control device comprises planet wheel, gear shaft, active spiral gear;
In above-mentioned arm for adjusting automobile brake clearance automatically, described damping mechanism comprises adjusts screw, spring, steel ball.
In above-mentioned arm for adjusting automobile brake clearance automatically, described control arm assembly comprises and is contained in the worm wheel aperture and sun gear, profile of tooth connecting sleeve, cover plate and the control arm coaxial with worm gear; Sun gear is meshed with planet wheel; The profile of tooth connecting sleeve is combined above-mentioned part; Wherein the profile of tooth connecting sleeve is riveted into one sun gear, control arm; Cover plate by screw on housing; Control arm is used for fixedlying connected with axle housing by link when this adjustment arm is installed on the vehicle.
Compared with prior art, the advantage of this arm for adjusting automobile brake clearance automatically is:
1:, unrestricted so control arm can install and fix around any position of center line on circumference because the transmission of movement of control arm assembly has adopted planetary gears.For the installation, maintenance exchange of adjusting arm provides convenience;
2: owing to gap control device is arranged on the leading portion of whole Transmitted chains; Like this, when the brake clearance of break was in the normal range (NR), the part behind the gap control device did not move, and adjusted arm automatically and did not adjust, and had reduced the wearing and tearing of Transmitted chains rear part;
3: the part of flute profile free wheel device all is sleeved on the sleeve, and adopts check ring lock-up clutch stator, makes it become an independently component.For installation and maintenance and renewal part bring convenience;
4: between the left side of flute profile overrunning clutch sleeve and the adjustment blind nut with holes thrust bearing is housed.Surface friction drag when having reduced the parts motion has reduced the wearing and tearing of part, has improved and has adjusted the arm reliability and stability of compensation automatically.
Description of drawings
Fig. 1 is the structural representation of arm for adjusting automobile brake clearance automatically.
Fig. 2 is the A-A sectional view of Fig. 1, i.e. gap control device part schematic representation.
Fig. 3 is the B-B sectional drawing of Fig. 2.It is gap control device rectangular teeth mate;
Fig. 4 is the schematic representation of flute profile free wheel device.
Fig. 5 is the sectional structure chart of arm for adjusting automobile brake clearance automatically control arm assembly.
Among the figure: 1, housing; 2, worm gear; 3, sun gear; 4, planet wheel; 5, gear shaft; 6, active spiral gear; 7, oil sealing; 8, adjustment blind nut with holes; 9, thrust bearing; 10, sleeve; 11, passive spiral gear; 12, spring; 13, clutch moving plate; 14, cover; 15, check ring; 16, clutch stator; 17, worm shaft; 18, jackscrew; 19, big spring; 20, adjust blind nut; 21, spring seat; 22, screw; 23, cover plate; 24, control arm; 25, grease nipple; 26, adjust screw; 27, spring; 28, steel ball; 29, profile of tooth connecting sleeve.
Embodiment
As Fig. 1, shown in Figure 4: this arm for adjusting automobile brake clearance automatically: comprise housing 1, housing top is a swing arm, and swing arm links to each other with the push rod of the brake chamber of automobile by bearing housing 14; Worm gear 2 is housed in the housing 1 reaches and its engaged worm axle 17, the right-hand member of worm shaft 17 is provided with big spring 19, spring seat 21 and adjusts blind nut 20; The left end of worm shaft 17 is equipped with clutch stator 16, clutch moving plate 13, passive spiral gear 11, sleeve 10, check ring 15, spring 12, thrust bearing 9, oil sealing 7, the adjustment blind nut 8 with holes of flute profile free wheel device successively.
In the present embodiment, big spring 19 acts on spring thrust on the worm shaft 17 by spring seat 21, and the awl tooth top in worm shaft 17 left sides is pressed on the awl tooth on flute profile free wheel device stator 16 right sides; The left side of flute profile free wheel device stator 16 endoporus is compressed by the right side of sleeve 10, and the left side of sleeve 10 is pressed on the thrust bearing 9, successively spring thrust is passed to adjustment blind nut 8 with holes through sleeve 10;
As shown in Figure 1, the adjustment blind nut 8 with holes in thrust bearing 9 left sides is connected with housing 1 by screw thread.Assembling or when maintenance,, make retention gap δ between the worm screw right side of worm shaft 17 and the housing 1 by rotating adjustment blind nut 8 with holes.Guarantee when the awl tooth clutch of worm shaft 17 and clutch stator 16, can move axially.Adjust and finish back jackscrew 18 fixed belt holes adjustment blind nut 8;
The left end of worm shaft 17 passes the outside that adjustment blind nut 8, six square toes with holes stretch out housing 1, so that use during the arm for adjusting automobile brake clearance automatically manual adjustment.Corrode part in order to stop impurity such as dust and water to enter enclosure interior, adjusting oil sealing 7 seal casinghousings of installation between blind nut 8 and the worm shaft 17, to prolong the working life of product.
Adjust blind nut 20 and connect by screw thread and housing 1, it is fixing with jackscrew 18 that the arm for adjusting automobile brake clearance automatically assembly is installed adjustment end back, avoids adjusting blind nut 20 and become flexible.
As Fig. 1, shown in Figure 4, in the present embodiment, the right side of the left side of clutch stator 16 and clutch moving plate 13 is provided with unidirectional end face tooth and is meshing with each other, and is combined as the flute profile free wheel device.Rectangle projection, the spring 12 of the left end rectangular recess of clutch moving plate 13 and passive spiral gear 11 right-hand members are combined into coupling; The clutch moving plate 13 that makes the flute profile free wheel device is during with respect to 16 clutches of clutch stator, the resistance that clutch moving plate 13 can overcome spring 12 moves axially, with guarantee that clutch moving plate 13 can separate with respect to the serrated end face tooth of clutch stator 16 or in conjunction with and turn over corresponding angle.Check ring 15 in the flute profile free wheel device is stuck in the circular groove of sleeve 10 external cylindrical surfaces and clutch stator 16 cylindrical holes, and clutch stator 16, clutch moving plate 13, passive spiral gear 11, spring 12 are combined into an independently component.The effect of sleeve 10 be axial force that big spring 19 is produced when guaranteeing that Wimble tooth-like clutch is in normal engagement, give thrust bearing 9 and adjustment blind nut 8 with holes with axial force transmission successively; Make the clutch state of the flute profile free wheel device that is sleeved on the sleeve 10 not influenced by the axial force of big spring 19;
As Fig. 2, shown in Figure 3, in the present embodiment, active spiral gear 6 in the gap control device and 11 engagements of the passive spiral gear in the flute profile free wheel device; Initiatively the left end of spiral gear 6 is helical tooths, and right-hand member is three fan-shaped bumps, and the central angle of each fan-shaped bump is β; The right-hand member of planet wheel 4 is and the spur gear of sun gear engagement that left end has three scalloped recess.The central angle of each scalloped recess is α; After three fan-shaped bumps of active spiral gear 6 inserted in three scalloped recess of planet wheels 4, the sector space of alpha-beta=γ appearred between projection and groove.The γ angle is the idle running angle of planet wheel when the braking system normal brake application, is giving that gap control device sets and stays the gap.Initiatively the left end of spiral gear 6 is provided with steel ball 28, spring 27 and adjusts screw 26, and steel ball 28 mainly is that the rotation to active spiral gear 6 plays damping and restriction.
As shown in Figure 5, adjust in the arm automatically at this, the control arm assembly is made up of sun gear 3, control arm 24, cover plate 23 and profile of tooth connecting sleeve 29; Sun gear 3, cover plate 23, control arm 24 all are placed on the profile of tooth connecting sleeve 29, and profile of tooth connecting sleeve 29 is riveted into one sun gear 3, control arm 24 and can rotates with respect to cover plate 23.Sun gear 3 is meshed with the planet wheel 4 of gap control device.When arm for automatically regulating clearance of brake was braked air chamber and promotes to rotate around the center line of camshaft, all parts that housing 1 drives in the housing rotated with respect to the control arm assembly.
Working principle of the present invention is: when the brake chamber push rod promotion arm for automatically regulating clearance of brake rotation of braking system began to brake, because control arm 24 is fixed on the vehicle bridge and does not rotate, housing 1 relatively rotated with the control arm assembly; Because the sun gear 3 in the control arm assembly is riveted together with control arm 24, so housing 1 also relatively rotates with sun gear 3.The housing 1 that rotates drives cylindrical revolution and the generation rotation of planet wheel 4 around sun gear 3.
When the vehicle braked gap was in normal range (NR): because planet wheel 4 leaves sector space with active spiral gear 6 convex-concave connecting parts in the gap control device, promptly gap control device set the central angle γ in gap.At this moment, the angle that planet wheel 4 is rotated is (in the scope in normal brake application gap) when being no more than the central angle γ of sector space, and only planet wheel 4 dallies in the scope of 0-γ, and initiatively spiral gear 6 does not rotate; So passive spiral gear, profile of tooth free wheel device, worm shaft, worm gear etc. are all less than motion.In finishing the process of normal brake application, arm for automatically regulating clearance of brake is not adjusted brake clearance;
When brake clearance that the vehicle braked gap sets because of wearing and tearing surpass: in the braking process, the corresponding increase of corner of arm for automatically regulating clearance of brake rotation, housing 1 is with respect to the also corresponding increase of angle of swing of control arm assembly, because after the angle of swing of planet wheel 4 surpassed the central angle γ of sector space, initiatively spiral gear 6 rotated behind the resistance that overcomes steel ball 28 thereupon.And carry out transmission of power, because the setting of flute profile free wheel device, 13 relative clutch stator 16 clutches of clutch moving plate and jumping tooth by passive spiral gear 11, flute profile free wheel device moving plate 13.In the braking return process, the brake chamber push rod drives housing 1 and gets back to the home position, planet wheel 4 is also got back to original position around sun gear 3 counterrotatings, by gap control device, passive spiral gear 11 and profile of tooth mono-directional overrun clutch, drive worm shaft 17, the corresponding angle of worm gear 2 rotations, eliminate the gap that is increased, finish once and adjust.Thereby in good time compensation the increment of brake clearance.
In addition, when the manual adjustment arm for automatically regulating clearance of brake, pull the six square toes rotation of worm shaft 17 left ends with spanner, the thrust that worm shaft 17 overcomes big spring 19 moves right after the δ distance, the awl tooth of worm shaft 17 is separated with the awl tooth of flute profile free wheel device stator 16 and rotate, reach the purpose of manual adjustment.Because the structural characteristics of this arm for automatically regulating clearance of brake can adopt manual way to carry out forward and oppositely adjustment.
Claims (9)
1. arm for adjusting automobile brake clearance automatically, it comprises a housing (1), worm gear (2) and worm shaft (17) are housed in the housing (1), one end of worm shaft (17) is provided with big spring (19), spring seat (21) and adjusts blind nut (20), it is characterized in that on the other end diameter of axle of described worm shaft (17) the flute profile free wheel device being housed; Described flute profile mono-directional overrun clutch comprises: sleeve (10), passive spiral gear (11), clutch moving plate (13), clutch stator (16), check ring (15) and spring (12); The passive spiral gear (11) of flute profile free wheel device is meshed with the active spiral gear (6) of gap control device; The control arm assembly coaxial with worm gear is housed in worm wheel aperture, and the sun gear in the control arm assembly (3) is meshed with the planet wheel (4) of gap control device.
2. arm for adjusting automobile brake clearance automatically according to claim 1, it is characterized in that the check ring (15) in the described flute profile free wheel device is stuck in the circular groove of sleeve (10) external cylindrical surface and clutch stator (16) cylindrical hole, clutch stator (16) and sleeve (10) are fixed together, other parts are enclosed on the sleeve (10), become a relatively independent assembly.
3. arm for adjusting automobile brake clearance automatically according to claim 2 is characterized in that clutch moving plate (13) the left end rectangular recess of flute profile free wheel device and rectangle projection, the spring (12) of passive spiral gear (11) right-hand member are combined into coupling; The clutch moving plate (13) that makes the flute profile free wheel device is during with respect to clutch stator (16) clutch, and the resistance that clutch moving plate (13) can overcome spring (12) moves axially.
4. arm for adjusting automobile brake clearance automatically according to claim 1 is characterized in that the awl tooth on flute profile free wheel device stator (16) right side and the awl tooth in worm shaft (17) left side are in normal engagement under the effect of spring force, form Wimble tooth-like clutch.
5. arm for adjusting automobile brake clearance automatically according to claim 1, the passive spiral gear (11) that it is characterized in that the flute profile free wheel device is meshed with the active spiral gear (6) of gap control device, described passive spiral gear (11) is 45 ° with the helix angle of active spiral gear (6), and their spin axis is orthogonal.
6. arm for adjusting automobile brake clearance automatically according to claim 1 is characterized in that being equipped with in the housing (1) worm gear (2) and worm shaft (17), and they adopt the unidirectional tooth engagement of asymmetric profile of tooth pressure angle.
7. arm for adjusting automobile brake clearance automatically according to claim 1 is characterized in that the left end of the active spiral gear (6) in the gap control device is a helical tooth, and right-hand member is three fan-shaped bumps, and the central angle of each fan-shaped bump is β; The right-hand member of planet wheel (4) is the spur gear that meshes with sun gear, left end has three scalloped recess, the central angle of each scalloped recess is α, after three fan-shaped bumps of active spiral gear (6) insert in three scalloped recess of planet wheels (4), the sector space that occurs alpha-beta=γ between projection and groove, γ angle are the idle running angle of planet wheel when the braking system normal brake application.
8. arm for adjusting automobile brake clearance automatically according to claim 7, it is characterized in that initiatively the left end of spiral gear (6) is provided with steel ball (28), spring (27) and adjustment screw (26), steel ball (28) mainly is that the rotation to active spiral gear (6) plays damping and restriction.
9. arm for adjusting automobile brake clearance automatically according to claim 1, it is characterized in that the control arm assembly comprises is contained in the worm wheel aperture and sun gear (3), profile of tooth connecting sleeve (29), cover plate (23) and the control arm (24) coaxial with worm gear combines, and profile of tooth connecting sleeve (29) is riveted into one sun gear (3), control arm (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100555293A CN100497987C (en) | 2007-04-17 | 2007-04-17 | Arm for automatically regulating clearance of brake of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100555293A CN100497987C (en) | 2007-04-17 | 2007-04-17 | Arm for automatically regulating clearance of brake of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101173701A true CN101173701A (en) | 2008-05-07 |
| CN100497987C CN100497987C (en) | 2009-06-10 |
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ID=39422369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100555293A Expired - Fee Related CN100497987C (en) | 2007-04-17 | 2007-04-17 | Arm for automatically regulating clearance of brake of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100497987C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148137A (en) * | 2013-02-26 | 2013-06-12 | 同济大学 | Active control device for reducing air pumping power consumption of brake disc of high speed train |
| CN104179819A (en) * | 2014-07-29 | 2014-12-03 | 惠州市华阳多媒体电子有限公司 | Clutch |
| CN104930110A (en) * | 2015-06-16 | 2015-09-23 | 吉林大学 | Gear display device of manual adjustable-damping vibration absorber based on planetary gear train |
| 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 |
| CN103244583B (en) * | 2013-04-03 | 2016-03-02 | 绍兴铁安汽配制造有限公司 | A kind of worm screw two ends are provided with the brake clearance manual adjusting arm device of umbrella toothing |
| CN107781328A (en) * | 2017-10-23 | 2018-03-09 | 山东泰丰制动系统科技股份有限公司 | New construction arm for adjusting automobile brake clearance automatically |
| CN107975554A (en) * | 2017-10-23 | 2018-05-01 | 山东泰丰制动系统科技股份有限公司 | The method for adjusting brake clearance between shoe brake and brake drum |
| CN108999900A (en) * | 2018-10-19 | 2018-12-14 | 无锡晶华汽车制动器有限公司 | A kind of gas brake automatic adjusting arm |
| CN110345181A (en) * | 2019-07-19 | 2019-10-18 | 绍兴铁安汽配制造有限公司 | A kind of light-type arm for automatically regulating clearance of brake and braking system |
| CN110836230A (en) * | 2019-12-10 | 2020-02-25 | 广州市润浩汽车配件有限公司 | Novel worm shaft assembly for automatic adjusting arm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1440263A (en) * | 1973-05-12 | 1976-06-23 | Bendix Westinghouse Ltd | Slack adjusters |
-
2007
- 2007-04-17 CN CNB2007100555293A patent/CN100497987C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148137B (en) * | 2013-02-26 | 2015-10-21 | 同济大学 | A kind of active control device reducing brake disc of high-speed train pump wind power consumption |
| CN103148137A (en) * | 2013-02-26 | 2013-06-12 | 同济大学 | Active control device for reducing air pumping power consumption of brake disc of high speed train |
| CN103244583B (en) * | 2013-04-03 | 2016-03-02 | 绍兴铁安汽配制造有限公司 | A kind of worm screw two ends are provided with the brake clearance manual adjusting arm device of umbrella toothing |
| CN104179819B (en) * | 2014-07-29 | 2017-09-22 | 惠州市华阳多媒体电子有限公司 | A kind of clutch |
| CN104179819A (en) * | 2014-07-29 | 2014-12-03 | 惠州市华阳多媒体电子有限公司 | Clutch |
| CN104930110A (en) * | 2015-06-16 | 2015-09-23 | 吉林大学 | Gear display device of manual adjustable-damping vibration absorber based on planetary gear train |
| 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 |
| CN107781328A (en) * | 2017-10-23 | 2018-03-09 | 山东泰丰制动系统科技股份有限公司 | New construction arm for adjusting automobile brake clearance automatically |
| CN107975554A (en) * | 2017-10-23 | 2018-05-01 | 山东泰丰制动系统科技股份有限公司 | The method for adjusting brake clearance between shoe brake and brake drum |
| CN108999900A (en) * | 2018-10-19 | 2018-12-14 | 无锡晶华汽车制动器有限公司 | A kind of gas brake automatic adjusting arm |
| CN110345181A (en) * | 2019-07-19 | 2019-10-18 | 绍兴铁安汽配制造有限公司 | A kind of light-type arm for automatically regulating clearance of brake and braking system |
| CN110345181B (en) * | 2019-07-19 | 2024-02-27 | 绍兴铁安汽配制造有限公司 | Light-weight type automatic brake clearance adjusting arm and brake system |
| CN110836230A (en) * | 2019-12-10 | 2020-02-25 | 广州市润浩汽车配件有限公司 | Novel worm shaft assembly for automatic adjusting arm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100497987C (en) | 2009-06-10 |
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Granted publication date: 20090610 Termination date: 20110417 |