CN104712689A - Disk brake cylinder assembly with parking mechanism and brake caliper - Google Patents
Disk brake cylinder assembly with parking mechanism and brake caliper Download PDFInfo
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- CN104712689A CN104712689A CN201510093296.0A CN201510093296A CN104712689A CN 104712689 A CN104712689 A CN 104712689A CN 201510093296 A CN201510093296 A CN 201510093296A CN 104712689 A CN104712689 A CN 104712689A
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Abstract
The invention discloses a disk brake cylinder assembly with a parking mechanism and a brake caliper. The disk brake cylinder assembly comprises a cylinder block, a piston, a travel adjusting threaded sleeve, a travel adjusting threaded rod, a steel ball, a drive shaft, a plane sliding bearing, an O-shaped seal ring and a spring resetting device. One end of the travel adjusting threaded rod is provided with a multi-head saw-tooth thread. The other end of the travel adjusting threaded rod is a ball disk with slope rolling ways. Arc-shaped guide bosses are evenly distributed on the outer edge of the ball disk, and the bosses are matched with grooves in a cylinder hole and prevent the travel adjusting threaded rod from rotating. The travel adjusting threaded rod has good centering performance, and therefore an auxiliary piston having the centering function in the piston is omitted. By the adoption of the disk brake cylinder assembly with the parking mechanism, the movement type of parts of the parking mechanism is simplified, and the risk that multiple leaking points exist in existing known structures is avoided. The disk brake cylinder assembly with the parking mechanism is simple in structure and higher in safety performance, the parts can be more easily machined, the transmission efficiency of the parking brake force is improved, and low cost, high performance and higher safety performance are effectively combined.
Description
Technical field
The invention belongs to the disc brake mechanism field of band halting mechanism, refer to a kind of disc type brake cylinder assembly with parking and braking mechanism particularly, the invention still further relates to the rear row-parking disc type braking tong comprising this master cylinder assembly.
Background technique
In the disc type braking tong of band parking and braking mechanism known at present, generally adopt stroke adjustment screw rod and Adjusting bolt Adjusting screw mating reaction to carry out passing shaft to steering force, and revolve the wearing and tearing of stretching and compensating braking plate friction material by screw thread.In the conductive process of axial braking force, masterpiece be used in match screw rod, swivel nut thread helix face on, screw rod or swivel nut can be made to produce convolution, exert all one's strength lax.For ensureing unlikely absent-mindedness in the conductive process of power, a rotation-preventing mechanism must be increased, preventing screw rod or swivel nut from rotating, only allowing to move axially.
Existing known, disclosed in CN01805802.7, a kind of halting mechanism brake calipers, have employed and be fixed on housing, screws in the convolution of the lock screw restriction swivel nut in housing;
In EP0403635B1 and CN1147291A, disclose a kind of employing and arrange bottom cylinder holes and rotate with the eccentric rotation-proof pin Lai Fang mechanism of parallel to an axis; Publication number is that the Chinese invention patent of CN101852257A discloses a kind of disc type braking tong with parking braking, this patent uses a fixed cover in caliper shell, its fixed cover external diameter is fixed on the inwall of housing, the head of fixed cover internal diameter and swivel nut, by projection and groove fit, stops the rotation of swivel nut.
Application number be 2012205295617 Chinese utility model patent disclose a kind of brake calipers with parking and braking mechanism.Also anti-rotation lining is adopted to prevent from rotating.
But, following shortcoming is existed for above mechanism form:
1, adopt anti-rotation lock screw, the conduction of parking power can affect by lock screw bias force, the aggravation wearing and tearing of part and the reduction of mechanism efficiency; And lock screw under force, it also may be caused to loosen and produce leakage or parking inefficacy;
2, adopt eccentric rotation-proof pin, machining accuracy and the matching requirements of its part are high; Set eccentric rotation-proof pin is under the effect of bias force, and cause the centering of force-transmitting part poor, power transmission efficiency is low.
3, use fixed cover, although solve the impact because bias force causes, add number of spare parts and manufacture the difficulty coordinated, the quality of fit between each part directly affects the centring property of part, reduces the efficiency of Effector;
4, in above-mentioned known parking and braking mechanism, this arrestment mechanism is subject to the effect of lock screw and eccentric rotation-proof pin reaction force or the gap of the many fitting surface formation of fixed cover and foozle to be affected, the centering of force-transmitting part can be caused poor, the power be delivered on piston can offset the axis of piston, and part stress is unbalanced; Therefore, in above-mentioned known halting mechanism, in order to the defect overcoming prior art has set up auxiliary piston, its object is exactly the centering increasing swivel nut or screw rod; But set up auxiliary piston just to need to increase seal ring, piston needs increase exhaust port, which increases the risk of leakage of oil.
Summary of the invention
The first object of the present invention is the shortcoming and defect for existing rear disc type halting mechanism, provide a kind of disc type brake cylinder assembly with halting mechanism, this disc type brake cylinder assembly eliminates conventional lock screw or fixed cover part, without the need to auxiliary piston and Sealing, the parking and braking mechanism that ball dish and screw rod are combined into one, the master cylinder assembly that this mechanism is formed has that part is few, size is little, good manufacturability, make simple, the features such as reliable performance, there is parking braking efficiengy-increasing simultaneously, the advantage that integral manufacturing cost significantly reduces.
The second object of the present invention is to provide a kind of rear row-parking disc type braking tong comprising this master cylinder assembly.
For solving the problems of the technologies described above, first object provided by the invention is reached by following measure: a kind of disc type brake cylinder assembly with halting mechanism, comprise hollow and the housing of the perforate from left to right progressively diminished, be disposed with piston, stroke adjustment screw rod and live axle in perforate; Described live axle is connected by straight-tooth spline with the tie rod arm assembly outside housing through the cylinder holes bottom of the other end of housing; Described live axle one end in cylinder body is provided with disk, with the multiple first domatic alley of central distribution on the outer surface of described disk.The overall structure that described stroke adjustment screw rod is made up of screw rod and ball dish; The ball dish of described stroke adjustment screw rod is provided with the second domatic alley corresponding with the first domatic alley of live axle, steel ball is provided with in described first domatic alley and the second domatic alley, the outer rim of the ball dish on described stroke adjustment screw rod is evenly arranged the guide ledges of multiple arc anti-rotation, and described guide ledges is positioned at the arc groove that inner walls is offered; Described guide ledges and the second domatic alley are in same radius, and described screw rod periphery is provided with return spring, described return spring is arranged on spring seat, and described spring seat is assemblied on the inboard wall of cylinder block of housing,
Described screw rod comprises near the cylinder of ball dish with the screw head of bull buttress thread form be connected with tool withdrawal groove between cylinder and screw head, and described screw head inserts in piston hole through stroke adjustment swivel nut;
Described stroke adjustment swivel nut is made up of swivel nut cylindrical body and conical surface boss, and swivel nut cylindrical body inwall is worm structure, and matches with screw head; The conical surface of described conical surface boss and piston is harmonious.
Further, be provided with successively from conical surface boss bottom surface between described piston inner wall and swivel nut cylindrical body outer wall for the rolling ring assembly of fixed journey system Adjusting bolt Adjusting screw, pad, wavy spring sheet and jump ring.
Again further, described live axle axle is arranged with successively plane sliding bearing and O RunddichtringO, described plane sliding bearing to be enclosed between the disk bottom surface of live axle and the inwall of housing and to fit with inner walls plane.
Again further, described tie rod arm assembly and live axle are connected and fixed by straight-tooth and nut.
Again further, described spring seat is assemblied on the inwall of housing by snap ring.
Again further, the guide ledges of described ball dish and the quantity of the second domatic alley are 3.
Again further, the diameter of described tool withdrawal groove is less than cylinder and screw head.
The second object of the present invention is by as follows: the rear row-parking disc type braking tong comprising above-mentioned master cylinder assembly.
Working principle of the present invention is:
During service brake, driver steps on brake petal makes hydraulic oil enter cylinder body by cylinder body oilhole, and piston is outwards mobile under brake system hydraulic effect promotes friction plate, two friction plates are pressed to brake disc, form chucking power thus, thus form automobile brake moment, make vehicle deceleration or stagnation of movement.
When parking braking, parking brake tension drag-line, parking tensile force impels drive shaft turns by tie rod arm, drives the steel ball between two ball dishes to move in the raceway of corresponding slope, produces end thrust, promotes stroke adjustment screw axial and moves.Stroke adjustment screw rod ball dish portion outer rim arc boss slides axially on the groove of inner walls, effectively prevents the rotation of stroke adjustment screw rod.The bar portion screw thread of stroke adjustment screw rod is connected with the stroke adjustment swivel nut in piston, promotes piston and moves vertically, friction plate is pressed to brake disc and forms parking power.Now, live axle is tightly attached to bottom cylinder holes under the pressure effect of Compress Spring.When parking brake loosens, tie rod arm is return under the effect of return spring elastic force, and stroke adjustment screw rod is return under Compress Spring elastic force, and in this process, steel ball also gets back to channel bottom.In whole process, live axle only rotates without axial motion.
Beneficial effect of the present invention is:
1, the stroke adjustment screw-rod structure that the present invention proposes designs, by the groove fit of arcuate guide boss directly and on housing cylinder holes wall, eliminate lock screw or fixed cover part, reduce and misalign problem because the manufacturing tolerances of fixed cover part and assembly precision affect the axis caused; The fit up gap eliminating fixed cover or may exist between pin and cylinder body, and bring following advantage:
1) improve the quality of fit of part, centering and guidance quality good;
2) transmission efficiency of power improves greatly;
3) decrease number of spare parts, improve the manufacturability of part, reduce difficulty of processing and cost;
2, to have centering good in the present invention, and in power transmittance process, loss is few, and input, the lever ratio exported are large, the feature that parking efficiency is high; The present invention does not use lock screw, eliminate auxiliary piston and Sealing, ball dish and screw rod compound stroke adjustment screw rod in aggregates, thus make that master cylinder assembly part is few, size is little, making is simple, compact structure, there is running braking function, have parking braking function, overall manufacture cost significantly reduces simultaneously.
3, the integrated type row parking brake caliper assembly being applicable to various ways of structure of the present invention, is also applicable to overlap joint combined type, the capable parking braking clamp of docking combined type.
Accompanying drawing explanation
Fig. 1 is the structural representation of the disc type brake cylinder assembly of band halting mechanism;
Fig. 2 is the structural representation of stroke adjustment screw rod and live axle;
Fig. 3 is stroke adjustment screw rod and piston exploded view;
Fig. 4 is the structural representation of parking stroke adjustment screw rod in the present invention.
Fig. 5 is the integrated type row parking brake caliper assembly structure containing master cylinder assembly
Fig. 6 is the capable parking brake caliper assembly structure of overlap joint combined type containing master cylinder assembly
In figure, housing 1, arc groove 1.1, piston 2, live axle 3, disk 3.1, first domatic alley 3.11, tie rod arm assembly 4, second domatic alley 5, stroke adjustment screw rod 6, ball dish 6.1, guide ledges 6.11, screw rod 6.2, cylinder 6.21, tool withdrawal groove 6.22, screw head 6.23, steel ball 7, return spring 8, spring seat 9, stroke adjustment swivel nut 10, swivel nut cylindrical body 10.1, conical surface boss 10.2, rolling ring assembly 11, pad 12, wavy spring sheet 13, jump ring 14, plane sliding bearing 15, O RunddichtringO 16, snap ring 17, belt 18, hook pawl 19, friction plate 20, support 21, brake disc 22, bridge plate 23, joint bolt 24.
Embodiment
In order to explain the present invention better, illustrate main contents of the present invention further below in conjunction with specific embodiment, but content of the present invention is not only confined to following examples.
Embodiment 1
As shown in the figure: the disc type brake cylinder assembly of band halting mechanism, comprises hollow and the housing 1 of the perforate from left to right progressively diminished, be disposed with piston 2, stroke adjustment screw rod 6 and live axle 3 in perforate; Live axle 3 is connected by straight-tooth spline with the tie rod arm assembly 4 outside housing through the cylinder holes bottom of the other end of housing 1; Axial wall between live axle 3 and tie rod arm assembly 4 is arranged leather cup 18; Live axle 3 one end in cylinder body is provided with disk 3.1, with the multiple first domatic alley 3.11 of central distribution on the outer surface of disk 3.1, and the overall structure that stroke adjustment screw rod 6 is made up of screw rod 6.2 and ball dish 6.1; The ball dish 6.1 of stroke adjustment screw rod 6 is provided with the second domatic alley 5 corresponding with the first domatic alley 3.11 of live axle 3, steel ball 7 is provided with in two domatic alleys, the outer rim of the ball dish 6.1 on stroke adjustment screw rod 6 is evenly arranged the guide ledges 6.11 of multiple arc anti-rotation, and guide ledges 6.11 is positioned at the arc groove 1.1 that housing 1 inwall is offered; And guide ledges 6.11 slidably reciprocates in arc groove 1.1;
The guide ledges 6.11 of ball dish 6.1 and the quantity of the second domatic alley 5 are 3, and guide ledges 6.11 and the second domatic alley 5 are in same radius, screw rod 6.2 periphery is provided with return spring 8, return spring 8 is arranged on spring seat 9, and spring seat 9 is assemblied on the inboard wall of cylinder block of housing 1
Screw rod 6.2 comprises near the cylinder 6.21 of ball dish 6.1 with the screw head 6.23 of bull buttress thread form be connected with tool withdrawal groove 6.22 between cylinder 6.21 and screw head 6.23, and the diameter of tool withdrawal groove 6.22 is less than cylinder 6.21 and screw head 6.23.
Screw head 6.23 inserts in piston 2 hole through stroke adjustment swivel nut 10;
Stroke adjustment swivel nut 10 is made up of swivel nut cylindrical body 10.1 and conical surface boss 10.2, and swivel nut cylindrical body 10.1 inwall is worm structure, and matches with screw head 6.23; Conical surface boss 10.2 is harmonious with the conical surface of piston.
Be provided with successively from conical surface boss 10.2 bottom surface between piston 2 inwall and swivel nut cylindrical body 10.1 outer wall for the rolling ring assembly 11 of fixed journey system Adjusting bolt Adjusting screw 10, pad 12, wavy spring sheet 13 and jump ring 14.
Live axle 3 axle is arranged with successively plane sliding bearing 15 and O RunddichtringO 16, plane sliding bearing 15 to be enclosed between disk 3.1 bottom surface of live axle 3 and the inwall of housing 1 and to fit with housing 1 inwall plane.Tie rod arm assembly 4 and live axle 3 are connected and fixed by straight-tooth and nut.Spring seat 9 is assemblied on the inwall of housing 1 by snap ring 17.
Working procedure:
During service brake, driver steps on brake petal makes hydraulic oil enter cylinder body by the oilhole of housing 1, piston 2 is outwards mobile under brake system hydraulic effect promotes friction plate, two friction plates are pressed to brake disc, form chucking power thus, thus form automobile brake moment, make vehicle deceleration or stagnation of movement.
During parking braking, parking brake tension drag-line, tie rod arm assembly 4 is struck, and drives live axle 3 to rotate, make steel ball 7 in domatic alley 5 produce axial displacement along ball-and-socket orbiting motion, now the guide ledges 6.11 of stroke adjustment screw rod 6 limits stroke adjustment screw rod 6 and moves vertically; Screw head 6.23 rotates into and ejects in piston 2, and live axle 3 is tightly attached to bottom cylinder holes under the pressure effect of return spring 8; When parking brake loosens, tie rod arm assembly 4 is return under the effect of return spring 8 elastic force, and stroke adjustment screw rod 6 is return under the effect of return spring 8 elastic force, and in this process, steel ball 7 also gets back to channel bottom.In whole process, live axle only rotates without axial motion.
Embodiment 2
The present embodiment is containing the integrated type row parking brake caliper assembly structure of master cylinder assembly, comprise outside the entire infrastructure of disc type master cylinder assembly in embodiment 1, its housing 1 is monolithic construction, the hook pawl 19 relative with piston 2 end face is had from housing is extended, between piston 2 and hook pawl 19, place friction plate 20, form the grasping part to brake disc 22.This structure also comprises the support 21 connecting housing and fixed friction sheet 20.
Its working procedure is identical with embodiment 1.
Embodiment 3
The present embodiment is containing the capable parking brake caliper assembly structure of overlap joint combined type of master cylinder assembly, and it comprises outside the entire infrastructure of disc type master cylinder assembly in embodiment 1, also comprises: bridge plate 23, joint bolt 24 and friction plate 20.
Its working procedure is identical with embodiment 1.
Other unspecified part is prior art.Although above-described embodiment is to invention has been detailed description; but it is only the present invention's part embodiment; instead of whole embodiment, people can also obtain other embodiments according to the present embodiment under without creative prerequisite, and these embodiments belong to scope.
Claims (8)
1. the disc type brake cylinder assembly with halting mechanism, it is characterized in that: comprise hollow and the housing (1) of the perforate (1.1) from left to right progressively diminished, be disposed with piston (2), stroke adjustment screw rod (6) and live axle (3) in perforate (1.1); Described live axle (3) is connected by straight-tooth spline with the tie rod arm assembly (4) outside housing through the cylinder holes bottom of the other end of housing (1); Described live axle (3) one end in cylinder body is provided with disk (3.1), with the multiple first domatic alley (3.11) of central distribution on the outer surface of described disk (3.1), the overall structure that described stroke adjustment screw rod (6) is made up of screw rod (6.2) and ball dish (6.1); The ball dish (6.1) of described stroke adjustment screw rod (6) is provided with the second domatic alley (5) corresponding with the first domatic alley (3.11) of live axle (3), steel ball (7) is provided with in described first domatic alley (3.11) and the second domatic alley (5), the outer rim of the ball dish (6.1) on described stroke adjustment screw rod (6) is evenly arranged the guide ledges (6.11) of multiple arc anti-rotation, and described guide ledges (6.11) is positioned at the arc groove (1.1) that housing (1) inwall is offered; Described guide ledges (6.11) and the second domatic alley (5) are in same radius, described screw rod (6.2) periphery is provided with return spring (8), described return spring (8) is arranged on spring seat (9), and described spring seat (9) is assemblied on the inboard wall of cylinder block of housing (1);
Described screw rod (6.2) comprises the cylinder (6.21) near ball dish (6.1), the screw head (6.23) with bull buttress thread form and is positioned between cylinder (6.21) and screw head (6.23) and is connected with tool withdrawal groove (6.22), and described screw head (6.23) is through in stroke adjustment swivel nut (10) insertion piston (2) hole;
Described stroke adjustment swivel nut (10) is made up of swivel nut cylindrical body (10.1) and conical surface boss (10.2), and swivel nut cylindrical body (10.1) inwall is worm structure, and matches with screw head (6.23); Described conical surface boss (10.2) is harmonious with the conical surface of piston.
2. the disc type brake cylinder assembly according to claim 1 with halting mechanism, it is characterized in that: described live axle (3) axle is arranged with successively plane sliding bearing (15) and O RunddichtringO (16), described plane sliding bearing (15) to be enclosed between disk (3.1) bottom surface of live axle (3) and the inwall of housing (1) and to fit with housing (1) inwall plane.
3. the disc type brake cylinder assembly according to claim 2 with halting mechanism, is characterized in that: described tie rod arm assembly (4) and live axle (3) are connected and fixed by straight-tooth and nut.
4. the disc type brake cylinder assembly according to claim 2 with halting mechanism, is characterized in that: described spring seat (9) is assemblied on the inwall of housing (1) by snap ring (17).
5. the disc type brake cylinder assembly with halting mechanism according to claim 3 or 4, is characterized in that: be provided with successively from conical surface boss (10.2) bottom surface between described piston (2) inwall and swivel nut cylindrical body (10.1) outer wall for the rolling ring assembly (11) of fixed journey system Adjusting bolt Adjusting screw (10), pad (12), wavy spring sheet (13) and jump ring (14).
6. the disc type braking tong according to claim 5 with halting mechanism, is characterized in that: the guide ledges (6.11) of described ball dish (6.1) and the quantity of the second domatic alley (5) are 3.
7. the disc type braking tong according to claim 5 with halting mechanism, is characterized in that: the diameter of described tool withdrawal groove (6.22) is less than cylinder (6.21) and screw head (6.23).
8. one kind comprises the rear row-parking disc type braking tong of disc type brake cylinder assembly described in any one in claim 1 ~ 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510093296.0A CN104712689A (en) | 2015-03-02 | 2015-03-02 | Disk brake cylinder assembly with parking mechanism and brake caliper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510093296.0A CN104712689A (en) | 2015-03-02 | 2015-03-02 | Disk brake cylinder assembly with parking mechanism and brake caliper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104712689A true CN104712689A (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510093296.0A Pending CN104712689A (en) | 2015-03-02 | 2015-03-02 | Disk brake cylinder assembly with parking mechanism and brake caliper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104712689A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369084A (en) * | 2016-08-31 | 2017-02-01 | 泛博制动部件（苏州）有限公司 | Assembly technology for improving parking efficiency of caliber |
| CN110445302A (en) * | 2019-08-07 | 2019-11-12 | 华尔达（厦门）塑胶有限公司 | A kind of brake structure of tube shaped electric machine |
| CN113983165A (en) * | 2021-11-04 | 2022-01-28 | 南方天合底盘系统有限公司 | Disc brake with integrated parking function and parking input and output characteristic calculation method |
| CN114658775A (en) * | 2022-01-28 | 2022-06-24 | 浙江亚太机电股份有限公司 | Hydraulic double-piston floating brake caliper integrating electronic parking function |
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| CN1406320A (en) * | 2000-11-28 | 2003-03-26 | 罗伯特博施有限公司 | Disc brake cylinder with parking brake mechanism |
| CN101852257A (en) * | 2009-03-30 | 2010-10-06 | 德尔福技术有限公司 | Disc calipers with parking brake |
| CN102472342A (en) * | 2009-06-30 | 2012-05-23 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Caliper of a disk brake |
| WO2013149777A1 (en) * | 2012-04-04 | 2013-10-10 | Continental Teves Ag & Co. Ohg | Brake calliper actuatable in a combined manner |
| CN204572874U (en) * | 2015-03-02 | 2015-08-19 | 武汉万向汽车制动器有限公司 | Disc type brake cylinder assembly with halting mechanism and brake calipers |
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2015
- 2015-03-02 CN CN201510093296.0A patent/CN104712689A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1406320A (en) * | 2000-11-28 | 2003-03-26 | 罗伯特博施有限公司 | Disc brake cylinder with parking brake mechanism |
| CN101852257A (en) * | 2009-03-30 | 2010-10-06 | 德尔福技术有限公司 | Disc calipers with parking brake |
| CN102472342A (en) * | 2009-06-30 | 2012-05-23 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Caliper of a disk brake |
| WO2013149777A1 (en) * | 2012-04-04 | 2013-10-10 | Continental Teves Ag & Co. Ohg | Brake calliper actuatable in a combined manner |
| CN204572874U (en) * | 2015-03-02 | 2015-08-19 | 武汉万向汽车制动器有限公司 | Disc type brake cylinder assembly with halting mechanism and brake calipers |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369084A (en) * | 2016-08-31 | 2017-02-01 | 泛博制动部件（苏州）有限公司 | Assembly technology for improving parking efficiency of caliber |
| CN110445302A (en) * | 2019-08-07 | 2019-11-12 | 华尔达（厦门）塑胶有限公司 | A kind of brake structure of tube shaped electric machine |
| CN113983165A (en) * | 2021-11-04 | 2022-01-28 | 南方天合底盘系统有限公司 | Disc brake with integrated parking function and parking input and output characteristic calculation method |
| CN113983165B (en) * | 2021-11-04 | 2022-10-14 | 南方天合底盘系统有限公司 | Disc brake with integrated parking function and parking input and output characteristic calculation method |
| CN114658775A (en) * | 2022-01-28 | 2022-06-24 | 浙江亚太机电股份有限公司 | Hydraulic double-piston floating brake caliper integrating electronic parking function |
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Application publication date: 20150617 |