CN102146973B - Self-regulating clearance hydraulic brake rear slave cylinder with temperature compensation function - Google Patents
Self-regulating clearance hydraulic brake rear slave cylinder with temperature compensation function Download PDFInfo
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- CN102146973B CN102146973B CN2011100628549A CN201110062854A CN102146973B CN 102146973 B CN102146973 B CN 102146973B CN 2011100628549 A CN2011100628549 A CN 2011100628549A CN 201110062854 A CN201110062854 A CN 201110062854A CN 102146973 B CN102146973 B CN 102146973B
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Abstract
The invention relates to a self-regulating clearance hydraulic brake rear slave cylinder with a temperature compensation function. The hydraulic brake rear slave cylinder comprises a slave cylinder shell, a piston with a ratchet disc, a regulating screw rod, a piston without a ratchet disc, a fastening screw, a spring clamping sheet, a dust-proof cover, a Y-type seal ring, a pressure releasing screw, an oil inlet and a seal combination head, wherein the dust-proof cover is arranged between the slave cylinder cover and the pistons; the cylinder hole bottom part of the slave cylinder shell is provided with the pressure releasing screw and the oil inlet; the oil inlet is provided with the seal combination head internally; the ratchet disc end of the piston with the ratchet disc is provided with an inner circular groove; the inner circular groove is provided with a temperature compensation ring internally; and one end of the temperature compensation ring is contact with the inner end surface of the slave cylinder shell. The self-regulating clearance hydraulic brake rear slave cylinder provided by the invention has the advantages that the self-regulating of brake clearance is realized, the response time of the brake is reduced, the slave cylinder piston is double-sealed, the reliability and durability of seal are improved, and the reliability of brake and driving safety are improved.
Description
[technical field] the present invention relates to auto parts machinery, relates to wheel cylinder after a kind of self-regulated gap hydraulic braking 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.
Present brake cylinder only adopts y-type seal ring, and when braking system was not worked, pipeline inner pressure was lower; The y-type seal ring of wheel cylinder only is in slight open configuration, has 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.
[summary of the invention] in order to address the above problem, and the present invention provides a kind of wheel cylinder after self-regulated temperature compensation function, double sealing structure the gap hydraulic braking that has.
Wheel cylinder after this self-regulated gap hydraulic braking with temperature compensation function; Comprise the piston, adjusting screw rod of branch pump case, band ratchet dish, not with piston, fastening screw trip bolt, spring card, dust-proof cover, y-type seal ring, bleed screw, filler opening and the sealed junction syncephalon of ratchet dish, be provided with dust-proof cover between branchs pump case and the piston, the grooved head of adjusting screw rod is placed on the outside of being with ratchet to vitalize plug; The adjusting screw rod the other end is installed in the band ratchet and vitalizes in the screw at plug center; The outer end of not vitalizing plug with ratchet is provided with straight trough, and bottom, branch pump case cylinder hole is provided with bleed screw and filler opening, is provided with the sealed junction syncephalon in the filler opening; It is characterized in that; The fluted disc end that the band ratchet is vitalized plug is provided with inner groove, and the temperature correction ring is installed in the inner groove, and 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 is vitalized the ratchet dish of plug near the band ratchet; Flexibly connect 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 band ratchet and vitalizes in the groove of plug head.
Vitalize plug inner end 1/3rd places apart from the band ratchet and be provided with groove, be provided with the O RunddichtringO in the groove.
Be not provided with groove apart from not being with ratchet to vitalize plug inner end 1/3rd places, be 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, just prevent the generation of " toning " phenomenon than avoiding brake drum to dawdle and the generation of locking 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.
Braking back wheel cylinder adopts the structure of double seal piston to have two functions, and 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 an internal structure schematic representation of the present invention
Fig. 2 is a plan view of the present invention
Fig. 3 is that the present invention adjusts pull bar and the schematic representation that is connected of adjusting lever
Fig. 4 is the A-A sectional view of Fig. 2
Among the figure: 1, adjusting screw rod, 2, the adjustment pull bar, 3, the piston of band ratchet dish, 4, the temperature correction ring, 5, holddown spring; 6, dust-proof cover, 7, the adjustment lever, 8, ship and resell on another market, 9, the O RunddichtringO, 10, y-type seal ring; 11, not with the piston of ratchet dish, 12, divide pump case, 13, pin, 14, set screw, 15, bleed screw; 16, filler opening, 17, the sealed junction syncephalon, 18, straight trough, 19, inner groove, 20, groove.
[embodiment] is following to explanation of the present invention below in conjunction with accompanying drawing:
In Fig. 1, Fig. 2, Fig. 3 and Fig. 4; Branch pump case 12 and band ratchet are vitalized plug and are provided with dust-proof cover 6 between 3, branchs pump case 12 be not with ratchet to vitalize between the plug 11 to be provided with dust-proof cover 6, the grooved head of adjusting screw rod 1 is placed on is with ratchet to vitalize to fill in 3 outside; Adjusting screw rod 1 the other end is installed in the band ratchet and vitalizes in the screw at plug 3 centers; Do not vitalize plug 11 outer end with ratchet and be provided with straight trough 18, branchs pump case 12 cylinder base are provided with bleed screw 15 and filler opening 16, are provided with sealed junction syncephalon 17 in the filler opening 16; The fluted disc end that the band ratchet is vitalized plug 3 is provided with inner groove 19; Temperature correction ring 4 is installed in the inner groove 19, and temperature correction ring 4 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 4 contacts with the interior edge face of branch pump case 12.
Be equipped with on the branch pump case 12 and ship and resell on another market 8, shipping and reselling on another market is with adjustment lever 7 on 8, ships and resell on another market 8 to be provided with holddown spring 5 with adjusting between the lever 7; One end of adjustment lever 7 is vitalized the ratchet dish of plug 3 near the band ratchet; Flexibly connect through pin 13 with the end of adjustment pull bar 2; Adjustment pull bar 2 flexibly connects through kidney slot and the set screw 14 that is installed on the branch pump case 12, and adjustment pull bar 2 the other ends are stuck in the band ratchet and vitalize in the groove of plug 3 heads.
The band ratchet is vitalized in the plug 3 and is provided with y-type seal ring 10, vitalizes plug 3 inner ends 1/3rd places apart from the band ratchet and is provided with groove 20, is provided with O RunddichtringO 9 in the groove 20.
Be not with ratchet to vitalize in the plug 11 and be provided with y-type seal ring 10, be not provided with groove 20, be provided with O RunddichtringO 9 in the groove 20 apart from not being with ratchet to vitalize plug 11 inner ends 1/3rd places.
Claims (4)
1. has wheel cylinder after the self-regulated gap hydraulic braking of temperature compensation function; Comprise the piston, adjusting screw rod of branch pump case, band ratchet dish, not with piston, fastening screw trip bolt, spring card, dust-proof cover, y-type seal ring, bleed screw, filler opening and the sealed junction syncephalon of ratchet dish; The piston of branch pump case and band ratchet dish and be not equipped with dust-proof cover between the piston with the ratchet dish; The grooved head of adjusting screw rod is placed on the band ratchet outside of vitalizing plug, and the adjusting screw rod the other end is installed in the band ratchet and vitalizes in the screw at plug center, and the outer end of not vitalizing plug with ratchet is provided with straight trough; The wheel cylinder housing bottom is provided with bleed screw and filler opening; Be provided with the sealed junction syncephalon in the filler opening, it is characterized in that, the fluted disc end that the band ratchet is vitalized plug is provided with inner groove; The temperature correction ring is installed in the inner groove, and an end of temperature correction ring contacts with the interior edge face of branch pump case.
2. wheel cylinder after the self-regulated gap hydraulic braking 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 vitalized the ratchet dish of plug near the band ratchet; 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 fastening screw trip bolt that is installed on the branch pump case, and the adjustment pull bar the other end is stuck in the band ratchet and vitalizes in the groove of plug head.
3. wheel cylinder after the self-regulated gap hydraulic braking with temperature compensation function according to claim 1 is characterized in that, vitalizes plug inner end 1/3rd places apart from the band ratchet and is provided with groove, is provided with the O RunddichtringO in the groove.
4. wheel cylinder after the self-regulated gap hydraulic braking with temperature compensation function according to claim 1 is characterized in that, is not provided with groove apart from not being with ratchet to vitalize plug inner end 1/3rd places, is provided with the O RunddichtringO in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100628549A CN102146973B (en) | 2011-03-16 | 2011-03-16 | Self-regulating clearance hydraulic brake rear slave cylinder with temperature compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100628549A CN102146973B (en) | 2011-03-16 | 2011-03-16 | Self-regulating clearance hydraulic brake rear slave cylinder with temperature compensation function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102146973A CN102146973A (en) | 2011-08-10 |
| CN102146973B true CN102146973B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100628549A Active CN102146973B (en) | 2011-03-16 | 2011-03-16 | Self-regulating clearance hydraulic brake rear slave cylinder with temperature compensation function |
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| CN (1) | CN102146973B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338174A (en) * | 2011-09-22 | 2012-02-01 | 芜湖恒坤汽车部件有限公司 | Piston stroke protecting device of brake wheel cylinder |
| CN102367847A (en) * | 2011-09-23 | 2012-03-07 | 芜湖恒坤汽车部件有限公司 | Automotive adjustable brake wheel cylinder |
| CN102425629B (en) * | 2011-10-26 | 2016-04-20 | 芜湖众发汽车制动系统有限公司 | A kind of hub clearance self-regulation type rear brake cylinder assembly |
| CN104196926A (en) * | 2014-07-19 | 2014-12-10 | 芜湖恒坤汽车部件有限公司 | A brake wheel cylinder |
| CN104696398A (en) * | 2015-02-05 | 2015-06-10 | 宁波市永硕精密机械有限公司 | Hydraulic brake wheel cylinder |
| 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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56101434A (en) * | 1980-01-12 | 1981-08-14 | Akebono Brake Ind Co Ltd | Automatic clearance regulator for drum brake |
| JPH08338463A (en) * | 1995-06-13 | 1996-12-24 | Nisshinbo Ind Inc | Automatic clearance adjuster of dram brake |
| CN2362756Y (en) * | 1999-03-11 | 2000-02-09 | 李永忠 | Brake assembling pump for agricultural tricycle |
| CN2818260Y (en) * | 2005-07-20 | 2006-09-20 | 余顺书 | Hydraulic braking general pump and subpump of jeep |
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2011
- 2011-03-16 CN CN2011100628549A patent/CN102146973B/en active Active
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| CN102146973A (en) | 2011-08-10 |
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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. |