CN102155506B - Self-regulation clearance hydraulic drum-type front brake with temperature compensation function - Google Patents
Self-regulation clearance hydraulic drum-type front brake with temperature compensation function Download PDFInfo
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- CN102155506B CN102155506B CN2011100628619A CN201110062861A CN102155506B CN 102155506 B CN102155506 B CN 102155506B CN 2011100628619 A CN2011100628619 A CN 2011100628619A CN 201110062861 A CN201110062861 A CN 201110062861A CN 102155506 B CN102155506 B CN 102155506B
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Abstract
The invention discloses a self-regulation clearance hydraulic drum-type front brake with a temperature compensation function. The brake comprises a brake bottom plate, two self-regulation clearance brake sub-pump assemblies and two friction liner-containing brake shoe assemblies, wherein the two self-regulation clearance sub-pump assemblies are arranged on the left and right sides of the brake bottom plate symmetrically in a 180-DEG rotating way; the two friction liner-containing brake shoe assemblies are fixed on the brake bottom plate through a compression spring and a rivet; the fluted disc end of a piston of each sub-pump assembly is provided with an inner ring groove; a temperature compensation ring is arranged in the inner ring groove; and one end of the temperature compensation ring is contacted with the inner end face of a sub-pump shell. The brake has the advantages that: a brake clearance can be automatically regulated, overregulation phenomena generated by continuous and frequent braking are eliminated, the operational stroke of a pedal is reduced, the response time of the brake is shortened, double seal of a sub-pump piston is realized, the reliability and the durability of the seal are improved, and braking reliability and driving safety are improved.
Description
[technical field] the present invention relates to auto parts machinery, relates to a kind of self-regulated gap hydraulic drum front brake with temperature compensation function particularly.
After long-time descending of [background technique] automobile hydraulic drum brake or the frequent continuously braking; The brake drum temperature raises; The drum internal diameter increases because of thermal expansion; And then produce " excessive gaps " that the thermal expansion by brake drum causes, and have from the break of conditioning function and will adjust brake clearance automatically, brake clearance is controlled within the scope of setting value.When excessive gap surpassed the gap width of setting, the adjustment amount of self-adjustment structure also just met or exceeded the gap setting value.When brake drum is cooled to the normal temperature state, can be because of brake clearance too small or do not have the gap and produce that break is dawdled or locking, produce " toning " phenomenon.For fear of the generation of toning, all obtained greatlyyer set gap width usually, can strengthen pedal travel and hysteresis braking response time like this, braking ability is had a negative impact, even can influence traffic safety.
The brake cylinder of hydraulic brake only adopts y-type seal ring at present; When braking system was not worked, pipeline inner pressure was lower, and the y-type seal ring of wheel cylinder only is in slight open configuration; Have slightly at y-type seal ring under the situation of wearing and tearing; The low pressure seepage possibly occur, pollute the brake shoe friction surface, reduce braking force.
In order to address the above problem, the present invention provides a kind of self-regulated temperature compensation function, double sealing structure gap hydraulic drum front brake that has [summary of the invention].
This self-regulated gap hydraulic drum front brake with temperature compensation function; Comprise that braking bottom board, two are from adjust the play brake cylinder assembly and two brake shoe band friction facing assemblies; Two are 180 ° from adjust the play wheel cylinder assembly and rotate the right and lefts that symmetry is installed in braking bottom board; Be fixed with two brake shoe band friction facing assemblies through stage clip and blind rivet on the braking bottom board, disc one end of brake shoe band friction facing assembly stretches in the straight trough of piston adjusting screw rod, and the other end stretches in the straight trough of wheel cylinder shell end; It is characterized in that; Divide the fluted disc end of pump assembly piston to be provided with inner groove, the temperature correction ring is installed in the inner groove, an end of temperature correction ring contacts with the interior edge face of branch pump case.
Be equipped with on the branch pump case and ship and resell on another market, be with the adjustment lever on shipping and reselling on another market, shipping and reselling on another market and adjusting is provided with holddown spring between the lever; One end of adjustment lever passes through pin with the end of adjustment pull bar and flexibly connects near the ratchet dish of piston, and the adjustment pull bar is through kidney slot and the set screw flexible connection that is installed on the branch pump case, and the adjustment pull bar the other end is stuck in the groove of piston crown.
Piston inner end 1/3rd places apart from dividing pump assembly are provided with groove, are provided with the O RunddichtringO in the groove.
The temperature correction ring is installed between the interior edge face of fluted disc right side and branch pump case of piston; The axial dimension of temperature correction ring expands and increases after being heated; Piston is ejected a segment distance, make brake shoe open certain distance, thereby dwindle " excessive gaps " that the thermal expansion by brake drum forms; When this gap width that has dwindled during less than the setting value of self-adjustment structure; Self-adjustment structure does not adjust; The compensation rate of appropriate design temperature compensation mechanism; When later brake clearance of compensation " excessive gaps " during still greater than the normal clearance setting value of self-regulated clearance mechanism, the self-regulated clearance mechanism can be adjusted its gap as usual.When the brake drum cooling; When brake clearance dwindled, temperature correction ring also Yin Wendu descended and axial dimension dwindles, and piston is bounced back in brake cylinder under the effect of brake shoe return spring; Brake shoe is retraction and then; Gap between brake drum and the brake shoe is increased, thereby avoid the brake drum generation with locking phenomenon of dawdling, also just prevent the generation of " toning " phenomenon.
When excessive gaps appearred in gasket wear, the piston motion stroke strengthened, and through the adjustment pull bar adjustment lever was rotated, and produced the moving tooth motion during piston return, adjusting screw rod is protracted, thereby dwindle brake clearance.
Divide pump assembly to adopt the structure of double seal piston to have two functions, the first is managed pressure when brakeless moves very low, and a small amount of seepage possibly appear in y-type seal ring, carries out secondary seal by the O RunddichtringO, has increased the reliability of leakage proof; It two is between the two seals circle, to form one section zone that has a small amount of brake fluid to exist, and being in when making y-type seal ring work has lubricated state, can not produce dry friction, greatly prolongs the working life of y-type seal ring, improves the reliability and the durability of sealing.
Advantage of the present invention: realized the automatic adjustment of brake clearance; Having improved break continuously, frequently brakes and forms " over control "; Reduced the pedal working stroke, reduced the break response time, the double seal of wheelcylinder piston; Improve the reliability and the durability of sealing, improved the reliability and the traffic safety of braking.
[description of drawings]
Fig. 1 is a structural representation of the present invention
Fig. 2 is the cut-away view from adjust the play wheel cylinder assembly of the present invention
Fig. 3 is the plan view from adjust the play wheel cylinder assembly of the present invention
Among the figure: 1, from adjust the play wheel cylinder assembly, 2, braking bottom board, 3, brake shoe band friction facing assembly, 4, adjusting screw rod, 5, the adjustment pull bar; 6, piston, 7, the temperature correction ring, 8, holddown spring, 9, the adjustment lever, 10, ship and resell on another market; 11, O RunddichtringO, 12, y-type seal ring, 13, divide pump case, 14, pin; 15, set screw, 16, straight trough, 17, inner groove, 18, groove.
[embodiment] is following to explanation of the present invention below in conjunction with accompanying drawing:
In Fig. 1 and Fig. 2; Two are 180 ° from adjust the play wheel cylinder assembly 1 and rotate the right and lefts that symmetry is installed in braking bottom board 2; Be fixed with two brake shoe band friction facing assemblies 3 through stage clip and blind rivet on the braking bottom board 2, disc one end of brake shoe band friction facing assembly 3 stretches in the straight trough of adjusting screw rod 4 of piston 6, and the other end stretches in the straight trough 16 of branch pump case 13 ends; The fluted disc end of piston 6 is provided with inner groove 17; Temperature correction ring 7 is installed in the inner groove 17, and temperature correction ring 7 is that the manganese powder with 20-25%, the iron powder of 60-65%, the titanium valve of 5-10% and the silica flour of 5-10% are processed, and its optimum proportioning is a manganese powder 20%; Iron powder 60%, titanium valve 10% and silica flour 10%, an end of temperature correction ring 7 contacts with the interior edge face of branch pump case 13.
Be equipped with on the branch pump case 13 and ship and resell on another market 10, shipping and reselling on another market is with adjustment lever 9 on 10, ships and resell on another market 10 to be provided with holddown spring 8 with adjusting between the lever 9; One end of adjustment lever 9 is near the ratchet dish of piston 6; Flexibly connect through pin 14 with the end of adjustment pull bar 5; Adjustment pull bar 5 flexibly connects through kidney slot and the set screw 15 that is installed on the branch pump case 13, and adjustment pull bar 5 the other ends are stuck in the groove of piston 6 heads.
Be provided with y-type seal ring 12 in the piston 6 of branch pump assembly 1, be provided with groove 18, be provided with O RunddichtringO 11 in the groove 18 apart from piston 6 inner ends 1/3rd places that divide pump assembly 1.
Claims (3)
1. the self-regulated gap hydraulic drum front brake that has temperature compensation function; Comprise that braking bottom board, two are from adjust the play brake cylinder assembly and two brake shoe band friction facing assemblies; Two are 180 ° from adjust the play wheel cylinder assembly and rotate the right and lefts that symmetry is installed in braking bottom board; Be fixed with two brake shoe band friction facing assemblies through stage clip and blind rivet on the braking bottom board, disc one end of brake shoe band friction facing assembly stretches in the straight trough of piston adjusting screw rod of precession centre screw, and the other end stretches in the straight trough of another wheel cylinder shell end; It is characterized in that; Divide the fluted disc end of pump assembly piston to be provided with inner groove, the temperature correction ring is installed in the inner groove, an end of temperature correction ring contacts with the interior edge face of branch pump case.
2. the self-regulated gap hydraulic drum front brake with temperature compensation function according to claim 1 is characterized in that, is equipped with on the branch pump case and ships and resell on another market, and is with the adjustment lever on shipping and reselling on another market, and shipping and reselling on another market and adjusting is provided with holddown spring between the lever; One end of adjustment lever is near the ratchet dish of piston; The other end of adjustment lever flexibly connects through pin with the end of adjustment pull bar; The adjustment pull bar flexibly connects through kidney slot and the set screw that is installed on the branch pump case, and the adjustment pull bar the other end is stuck in the groove of piston crown.
3. the self-regulated gap hydraulic drum front brake with temperature compensation function according to claim 1 is characterized in that, is provided with groove apart from piston inner end 1/3rd places that divide pump assembly, is provided with the O RunddichtringO in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100628619A CN102155506B (en) | 2011-03-16 | 2011-03-16 | Self-regulation clearance hydraulic drum-type front brake with temperature compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100628619A CN102155506B (en) | 2011-03-16 | 2011-03-16 | Self-regulation clearance hydraulic drum-type front brake with temperature compensation function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102155506A CN102155506A (en) | 2011-08-17 |
| CN102155506B true CN102155506B (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100628619A Active CN102155506B (en) | 2011-03-16 | 2011-03-16 | Self-regulation clearance hydraulic drum-type front brake with temperature compensation function |
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| Country | Link |
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| CN (1) | CN102155506B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488278A (en) * | 2018-02-28 | 2018-09-04 | 江铃汽车股份有限公司 | Brake clearance adjust automatically branch pump device and brake |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1107918A (en) * | 1965-09-28 | 1968-03-27 | Automotive Prod Co Ltd | Improvements in or relating to internal shoe drum brakes for vehicles |
| US3592303A (en) * | 1969-06-18 | 1971-07-13 | Bendix Corp | Boot protector |
| DE3303576C1 (en) * | 1983-02-03 | 1984-05-24 | Rockwell Golde Gmbh, 6000 Frankfurt | Detent pawl arrangement for the automatic adjusting device of a drum brake |
| US4809826A (en) * | 1987-01-29 | 1989-03-07 | Bendix France | Drum brake with automatic adjustment |
| CN2233002Y (en) * | 1995-08-03 | 1996-08-14 | 北京新利奥汽车技术发展公司 | Automotive drum-like self-adjusting brake for rear-wheel |
| CN1442621A (en) * | 2002-03-04 | 2003-09-17 | 现代自动车株式会社 | Wedge actuating drum type brake |
| CN201269276Y (en) * | 2008-07-08 | 2009-07-08 | 中国石油大学(北京) | Operating cylinder with expansion ring type automatic brake clearance regulation |
| CN201318407Y (en) * | 2008-11-25 | 2009-09-30 | 南京跃进汽车制动系统有限公司 | Brake wheel cylinder assembly with automatic clearance adjustment mechanism |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100779491B1 (en) * | 2002-02-08 | 2007-11-26 | 주식회사 만도 | Drum brake for vehicle |
| WO2005021993A1 (en) * | 2003-08-29 | 2005-03-10 | Safe Effect Pty Ltd | Fluid cooled drum brake system |
-
2011
- 2011-03-16 CN CN2011100628619A patent/CN102155506B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1107918A (en) * | 1965-09-28 | 1968-03-27 | Automotive Prod Co Ltd | Improvements in or relating to internal shoe drum brakes for vehicles |
| US3592303A (en) * | 1969-06-18 | 1971-07-13 | Bendix Corp | Boot protector |
| DE3303576C1 (en) * | 1983-02-03 | 1984-05-24 | Rockwell Golde Gmbh, 6000 Frankfurt | Detent pawl arrangement for the automatic adjusting device of a drum brake |
| US4809826A (en) * | 1987-01-29 | 1989-03-07 | Bendix France | Drum brake with automatic adjustment |
| CN2233002Y (en) * | 1995-08-03 | 1996-08-14 | 北京新利奥汽车技术发展公司 | Automotive drum-like self-adjusting brake for rear-wheel |
| CN1442621A (en) * | 2002-03-04 | 2003-09-17 | 现代自动车株式会社 | Wedge actuating drum type brake |
| CN201269276Y (en) * | 2008-07-08 | 2009-07-08 | 中国石油大学(北京) | Operating cylinder with expansion ring type automatic brake clearance regulation |
| CN201318407Y (en) * | 2008-11-25 | 2009-09-30 | 南京跃进汽车制动系统有限公司 | Brake wheel cylinder assembly with automatic clearance adjustment mechanism |
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|---|---|
| CN102155506A (en) | 2011-08-17 |
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Owner name: HUNAN YUNDA ELECTROMECHANICAL SCIENCE + TECHNOLOGY Free format text: FORMER NAME: HUNAN YUNDA MACHINERY MANUFACTURING CO., LTD. |
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Address after: 415500 No. 98 South Road, Lixian Economic Development Zone, Changde, Hunan Patentee after: Hunan Yunda Electromechanical Science & Technology Co., Ltd. Address before: 415500 Lixian Li Township of Changde city in Hunan province to protect the city to city neighborhood Patentee before: Hunan Yunda Machinery Manufacturing Co., Ltd. |