CN2474803Y - Brake clearance automatic adjustment device - Google Patents
Brake clearance automatic adjustment device Download PDFInfo
- Publication number
- CN2474803Y CN2474803Y CN 01220165 CN01220165U CN2474803Y CN 2474803 Y CN2474803 Y CN 2474803Y CN 01220165 CN01220165 CN 01220165 CN 01220165 U CN01220165 U CN 01220165U CN 2474803 Y CN2474803 Y CN 2474803Y
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- CN
- China
- Prior art keywords
- clutch
- worm shaft
- worm
- spring
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
Disclosed is a brake clearance automatic governing device which comprises a shell body. A one-way clutch composed by a clutch gear, a clutch cover, a clutch spring and a locking spring installed on a worm shaft is in the shell body. The locking spring is installed in the clutch spring, and the clutch spring is installed in the clutch gear and the annular wall of the clutch cover. Along the axial direction of the worm shaft, the clutch cover engages with the worm shaft through a pyramidal face, and is in the outside of the clutch gear. A dished spring is provided on the worm shaft in the rear of the worm. The worm joggles with the worm gear installed on a camshaft, and the clutch gear is installed on the worm shaft. The toothed part of one end of a rack meshes with the clutch gear, and the other end is provided with a finger and claw part engageable with the groove in a controlling loop.
Description
The utility model relates to a kind of clearance automatic adjustment device, particularly a kind of clearance automatic adjustment device that is installed on the vehicle S-cam break, can oppositely regulates brake clearance.
In the prior art, the S-cam break of automobile is to come automobile is implemented braking by brake lining and the friction between the brake drum that is installed on the brake shoe.It requires, and brake lining should be able to press against on the brake drum rapidly when braking.And when driving, allow break to press against on the brake drum anything but.More do not allow card, embrace the phenomenon generation.Therefore, a reasonable clearance should be set between brake lining and the brake drum.Cause the wearing and tearing of brake lining by friction, this brake clearance is increased gradually, make the corresponding growth of piston stroke of braking locellus simultaneously.If excessive gap can not get timely adjusting, certainly will influence the braking the corresponding time, when the break expanded by heating, brake clearance reduces on the contrary, will certainly produce block, locking phenomenon.Thereby, be directly connected to the driving safety of vehicle.Just because of this, all vehicle braked devices all need to be provided with the brake clearance controlling device.
Chinese patent ZL96241604.5 discloses clearance automatic adjustment device, and this device can be regulated the gap effectively automatically, but it does not have reverse regulatory function, promptly can not rotate counterclockwise worm-wheel shaft, and has the adjustment phenomenon excessively that causes because of elastic strain.
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, a kind of improved clearance automatic adjustment device is provided, it is compared with like product of the prior art, has increased reverse adjustment function, and can eliminate the adjustment phenomenon excessively that causes because of elastic strain.
The utility model clearance automatic adjustment device is installed in it on vehicle S-cam break.This device comprises housing.Wherein be provided with the single-stage overrunning clutch.Described single-stage overrunning clutch comprises clutch gear, clutch cover, clutch spring and the stopper spring that is sleeved on the worm shaft.Wherein stopper spring is sleeved in the clutch spring, and the clutch spring housing is contained in the annular wall of clutch gear and clutch cover.One end of described stopper spring is against the end wall inboard of clutch cover, and the other end is against the shaft shoulder of worm shaft; One end of clutch spring is against the end wall inboard of clutch cover, and the other end is against the end wall inboard of clutch gear.Along the axial direction of worm shaft, clutch cover is positioned at the outside of clutch gear.Overrunning clutch and the worm shaft that has worm screw are arranged in the inner chamber body.Worm screw and the worm gear that is installed on the camshaft are meshed.Be provided with annular plug screw in the left side of worm shaft, be provided with the packing ring of thrust-bearing effect between the end wall outside of its end wall inboard and clutch cover.On the worm shaft between worm screw and the clutch gear, be provided with supporting sleeve; Rack support is on housing.The band toothed portion of tooth bar one end is meshed with clutch gear, and the other end of tooth bar is provided with the paw part, and it matches with groove in the control ring that fixedly installs with respect to housing.It also comprises lining and belleville spring.Described clutch cover is provided with the inner conical surface that matches with the male cone (strobilus masculinus) of worm shaft; Described lining is taper, and it is sleeved on the worm shaft at worm screw rear; Described belleville spring is sleeved on the worm shaft at lining rear, and the one end is against the lining outer end wall, and the other end is against inner walls.
The utility model clearance automatic adjustment device wherein also comprises end cap, and it is coaxial and be arranged on the housing at worm shaft rear with worm shaft.
The structure of the clearance automatic adjustment device that the utility model provides is compared with the disclosed clearance automatic adjustment device of Chinese patent ZL96241604.5 with service behaviour, the conical friction clutch that is structurally cooperated with the worm shaft male cone (strobilus masculinus) by the clutch cover inner conical surface and form has replaced the spline Placement of original clutch cover and worm shaft, has installed belleville spring additional on the right side of worm shaft again.Thereby on performance, be greatly improved, promptly when the situation of brake block is turned and changed to break expanded by heating brake clearance automatically down counterclockwise the rotary worm axle make brake clearance become big, thereby reach its normal clearance; Eliminated the adjustment phenomenon excessively that causes because of elastic strain simultaneously, guaranteed that brake clearance remains unanimity.
Other details of the present utility model and characteristics can be cheer and bright by reading the embodiment hereinafter encyclopaedize in conjunction with the accompanying drawings.
Fig. 1 is the partial sectional view of Chinese patent ZL96241604.5 clearance automatic adjustment device, and this moment, this device was in non-braking position;
Fig. 2 is the partial sectional view of Chinese patent ZL96241604.5 clearance automatic adjustment device, and is wherein clear in order to describe, and removed control ring 1:
Fig. 3 is the partial sectional view of the clearance automatic adjustment device that has reverse adjustment structure that the utility model proposes.
For convenience's sake, the part that the utility model is identical with Chinese patent ZL96241604.5 has all used same label.
In Fig. 1, described the clearance automatic adjustment device that Chinese patent ZL96241604.5 proposes, the unitary construction of this device is identical with unitary construction of the present utility model.This device is installed on the automobile S-cam break of the prior art, wherein with worm gear 11 coaxial being installed on the S-cam camshaft of brakes B.Because automobile S-cam break belongs to prior art, so not expression in the accompanying drawings.
Can see that from Fig. 1 and 2 this device comprises housing 13.In housing 13, be provided with single-stage overrunning clutch 15.This single-stage overrunning clutch 15 comprises clutch gear 3, clutch cover 5, clutch spring 4 and the stopper spring 6 that is sleeved on the worm shaft 8.Stopper spring 6 coaxial packages are in clutch spring 4.Clutch spring 4 coaxial packages are in the annular wall of clutch gear 3 and clutch cover 5.One end of stopper spring 6 is against the shaft shoulder of worm shaft 8, and the other end is against the end wall inboard of clutch cover 5.Thereby can prevent clutch cover 5 because Vehicular vibration produces malfunction.One end of clutch spring 4 is against the end wall inboard of clutch cover 5, and the other end is against the end wall inboard of clutch gear 3.Along the axial direction of worm shaft 8, clutch cover 5 is positioned at the outside of clutch gear 3.Clutch gear 3 is sleeved on the worm shaft 8, and clutch cover 5 is sleeved on the worm shaft 8 by rectangular spline 19.Single-stage overrunning clutch 15, worm screw 12 and worm shaft 8 are arranged in the inner chamber body 20.Worm screw 12 and the worm gear 11 that is installed on the camshaft are meshed.In the course of the work, single-stage overrunning clutch 15 is in coupled condition with worm shaft 8 always.See Fig. 2, in the inner chamber body 20 of housing 13 worm shaft 8 be housed, one end coaxial package axle sleeve 14.In the hole 16 in the described axle sleeve 14 insertion single-stage overrunning clutch inner chamber body 20.Along the axial direction of worm shaft 8, between worm screw 12 and clutch gear 3, be provided with supporting sleeve 17, it is positioned at the medium position of worm shaft 8.
In Fig. 1, tooth bar 2 is supported on the housing 13.One end of tooth bar 2 is provided with toothed portion 21, and this toothed portion 21 is meshed with clutch gear 3.The other end of tooth bar 2 is provided with paw part 22, and this paw part 22 matches with groove 24 in the control ring 1 that fixedly installs with respect to housing 13.This control ring 1 is fixedly mounted on the not shown vehicle frame.The paw part 22 of tooth bar 2 one ends stretches in the groove 24 in the control ring 1.The described paw part 22 upper edge face or the face position, lower edge of the groove in control ring 1 24 is respectively touched the location.As can be seen from Figure 2: clutch cover 5 and worm shaft 8 be by spline fitted, so it does not have reverse regulatory function, and can not avoid the mistake adjustment phenomenon that causes because of elastic strain.
See Fig. 3: the utility model is compared institute's difference with the clearance automatic adjustment device that Chinese patent ZL96241604.5 proposes and is: described clutch cover 5 passes through cone match with worm shaft 8, its end is against the end face of clutch gear 3, the inner conical surface of the other end matches with the male cone (strobilus masculinus) of worm shaft 8, forms conical friction clutch.Taper bush 30 is sleeved on the worm shaft 8 at worm screw 12 rears.Belleville spring 31 is sleeved on the worm shaft 8 at lining 30 rears, and the one end is against lining 30 outer end wall, and the other end is against housing 13 inwalls.On the housing 13 at worm shaft 8 rears end cap 32 is housed, it act as dustproof.
Contrast accompanying drawing 1, Fig. 2 and Fig. 3 describe working procedure of the present utility model in detail below:
After break work a period of time, brake lining is worn, under the situation that brake clearance increases, when the push rod applied thrust F of braking locellus promotes the rotational of controlling device along the arrow A direction around camshaft, the tooth bar 2 that is supported by housing 13 is along with the rotation of housing 13, moves down towards the position at Fig. 1 middle rack 2 places.At this moment, do not have between intermeshing tooth bar 2 and the clutch gear 3 and relatively move.The paw 22 of tooth bar 2 leaves the upper edge face of the groove 24 on the fixed control ring 1.When paw 22 continues to move, when the face of the lower edge of contact groove 24, camshaft B drives cam and turns over corresponding angle, promotes brake shoe and eliminates the normal clearance of break (because so the structure of break belongs to prior art not shown).Owing to have excessive gaps between brake lining and brake drum, braking locellus push rod continues to promote controlling device and camshaft rotates.The lower edge face of the groove 24 of the paw 22 controlled rings 1 of this hour rack 2 stops and can not move.But housing 13 is rotated further, and the clutch gear 3 that meshes with tooth bar 2 is rotated by the effect of tooth bar 2, makes overrunning clutch be in separated state, tightly presses against up to brake lining and implements braking on the brake drum.When braking process finishes, eliminate the thrust F of braking locellus push rod, when making controlling device and camshaft return, along with housing 13 returns, housing 13 rotates towards the clockwise direction among Fig. 1, tooth bar 2 moves up from the lower edge face position contacting of paw 22 with groove 24, up to the upper edge face of paw 22 contact grooves.Brake lining is left brake drum and is reached normal clearance.Because brake lining is worn, and has excessive gaps between brake lining and brake drum, controlling device is rotated further return.But paw 22 is stopped and can't move by the upper edge face of groove 24, because tooth bar 2 is meshing with each other with clutch gear 3, force clutch gear 3 to rotate, overrunning clutch is in jointing state, and clutch cover 5 is along with stopper spring 6 rotates, and drives worm shaft 8 by rectangular spline and turn over corresponding angle.Make worm gear 11 drive camshaft B and turn over several angle, impel cam to promote brake shoe and open corresponding amount.Make thus because the brake clearance that wearing and tearing increase is compensated.
In the moment that closes to an end at above-mentioned braking process, brake weight sharply increases, and forces worm screw 12 to move right, because the effect of stopper spring 6, clutch cover 5 still is close at plug screw 10 1 ends.Like this, two conical surfaces of conical friction clutch are thrown off.At this moment, because the existence of resiliently deformable, tooth bar 2 continues to move upward and drives whole overrunning clutch and rotate counterclockwise, and worm shaft 8 is motionless.By the effect of butterfly spring 31, conical friction clutch engages after braking is finished.Can eliminate the adjustment phenomenon excessively that resiliently deformable causes like this, can guarantee that brake clearance remains unanimity; Because clutch cover 5 passes through cone match with worm shaft 8, make to the utlity model has reverse regulatory function simultaneously.When the gap between brake lining and the brake drum during, can make it to reach reasonable clearance by the nut that turns worm shaft 8 left parts less than reasonable clearance.
Claims (2)
1. clearance automatic adjustment device, it is installed on the vehicle S-cam break, this device comprises housing (13), wherein be provided with single-stage overrunning clutch (15), described single-stage overrunning clutch (15) comprises the clutch gear (3) that is sleeved on the worm shaft (8), clutch cover (5), clutch spring (4) and stopper spring (6), wherein stopper spring (6) is sleeved in the clutch spring (4), clutch spring (4) is sleeved in the annular wall of clutch gear (3) and clutch cover (5), one end of described stopper spring (6) is against the end wall inboard of clutch cover (5), the other end is against the shaft shoulder of worm shaft (8), one end of described clutch spring (4) is against the end wall inboard of clutch cover (5), the other end is against the end wall inboard of clutch gear (3), axial direction along worm shaft (8), clutch cover (5) is positioned at the outside of clutch gear (3), overrunning clutch (15) and the worm shaft (8) that has worm screw (12) are arranged in the inner chamber body (20), worm screw (12) and the worm gear (11) that is installed on the camshaft are meshed, in the course of the work, overrunning clutch (15) is in coupled condition with worm shaft (8) always, be provided with annular plug screw (10) in the left side of worm shaft (8), be provided with the packing ring (7) of thrust-bearing effect between the end wall outside of its end wall inboard and clutch cover (5), on the worm shaft (8) between worm screw (12) and the clutch gear (3), be provided with supporting sleeve (17); Tooth bar (2) is supported on the housing (13), the band toothed portion (21) of tooth bar (2) one ends is meshed with clutch gear (3), the other end of tooth bar (2) is provided with paw part (22), it matches with groove (24) in the control ring (1) that fixedly installs with respect to housing (13), it is characterized in that: also comprise lining (30) and belleville spring (31), described clutch cover (5) is provided with the inner conical surface that matches with the male cone (strobilus masculinus) of worm shaft (8); Described lining (30) is taper, and it is sleeved on the worm shaft (8) at worm screw (12) rear; Described belleville spring (31) is sleeved on the worm shaft (8) at lining (30) rear, and the one end is against lining (30) outer end wall, and the other end is against housing (13) inwall.
2. according to the described clearance automatic adjustment device of claim 1, it is characterized in that: also comprise end cap (32), it is coaxial and be arranged on the housing (13) at worm shaft (8) rear with worm shaft (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01220165 CN2474803Y (en) | 2001-04-25 | 2001-04-25 | Brake clearance automatic adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01220165 CN2474803Y (en) | 2001-04-25 | 2001-04-25 | Brake clearance automatic adjustment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2474803Y true CN2474803Y (en) | 2002-01-30 |
Family
ID=33637816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01220165 Expired - Fee Related CN2474803Y (en) | 2001-04-25 | 2001-04-25 | Brake clearance automatic adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2474803Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930092A (en) * | 2015-06-09 | 2015-09-23 | 安徽银力铸造有限公司 | Automatic locking automobile brake adjusting arm |
| CN109372917A (en) * | 2018-12-18 | 2019-02-22 | Bpw(梅州）车轴有限公司 | A kind of automatic clearance adjuster and its rotating angle control device of automotive brake |
| CN109563896A (en) * | 2017-05-31 | 2019-04-02 | 马德拉斯工程工业私人有限公司 | Automatic slack adjuster |
| WO2021088340A1 (en) * | 2019-11-04 | 2021-05-14 | Bpw(梅州）车轴有限公司 | Rotation angle control device, automatic clearance adjusting arm, and vehicle brake |
-
2001
- 2001-04-25 CN CN 01220165 patent/CN2474803Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930092A (en) * | 2015-06-09 | 2015-09-23 | 安徽银力铸造有限公司 | Automatic locking automobile brake adjusting arm |
| CN109563896A (en) * | 2017-05-31 | 2019-04-02 | 马德拉斯工程工业私人有限公司 | Automatic slack adjuster |
| CN109372917A (en) * | 2018-12-18 | 2019-02-22 | Bpw(梅州）车轴有限公司 | A kind of automatic clearance adjuster and its rotating angle control device of automotive brake |
| WO2021088340A1 (en) * | 2019-11-04 | 2021-05-14 | Bpw(梅州）车轴有限公司 | Rotation angle control device, automatic clearance adjusting arm, and vehicle brake |
| EP3848605A4 (en) * | 2019-11-04 | 2022-03-30 | Bpw (Meizhou) Axle Co., Ltd | Rotation angle control device, automatic clearance adjusting arm, and vehicle brake |
| RU2770333C1 (en) * | 2019-11-04 | 2022-04-15 | Бпв (Мэйчжоу) Эксль Ко., Лтд. | Steering angle adjustment device, automatic clearance regulator and car brake |
| JP2022532266A (en) * | 2019-11-04 | 2022-07-14 | ビーピーダブリュー （メイショウ） アクスル カンパニー、リミテッド | Rotation angle controller, automatic clearance adjuster, and car brake |
| JP7209827B2 (en) | 2019-11-04 | 2023-01-20 | ビーピーダブリュー （メイショウ） アクスル カンパニー、リミテッド | Rotational angle controllers, automatic clearance adjusters, and automotive brakes |
| AU2020294274B2 (en) * | 2019-11-04 | 2023-02-09 | Bpw (Meizhou) Axle Co., Ltd | Rotation angle control device, automatic clearance adjuster and automobile brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |