CN201989779U - Master cylinder of hydraulic brake - Google Patents
Master cylinder of hydraulic brake Download PDFInfo
- Publication number
- CN201989779U CN201989779U CN2011200327886U CN201120032788U CN201989779U CN 201989779 U CN201989779 U CN 201989779U CN 2011200327886 U CN2011200327886 U CN 2011200327886U CN 201120032788 U CN201120032788 U CN 201120032788U CN 201989779 U CN201989779 U CN 201989779U
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- plunger
- cavity
- pump housing
- cavity volume
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Abstract
The utility model relates to a master cylinder of a hydraulic brake, which comprises a first cylinder body and a second cylinder body, wherein the second cylinder body is connected with the first cylinder body through an oil pipe; the second cylinder body comprises a second oil cup positioned on the cylinder body, a small plunger cavity and a large plunger cavity; an axial groove is formed at the connection part of the small plunger cavity and the large plunger cavity; a second plunger is arranged in the large plunger cavity; the large plunger cavity is partitioned into a front containing cavity, a middle containing cavity and a rear containing cavity; a second reset spring is abutted against between the front side of the second plunger in the small plunger cavity and the second cylinder body; and a one-way valve is also arranged in the second pump body. The master cylinder of the hydraulic brake adopts a fission structure; and a pressure boosting structure is arranged in the second pump body and can be installed at any position of the oil pipe so as to reduce the volume of the first cylinder body at a handle position. The master cylinder of the hydraulic brake not only can provide larger oil pressure to a slave cylinder so as to ensure the brake effect of the brake, but also has a compact and small structure.
Description
Technical field
The utility model relates to a kind of master cylinder of drg, particularly relates to a kind of master cylinder that can be used for the hydraulic brake on the vehicle such as motor bike, storage battery car.
Background technology
Brake is a kind of very important drg in the vehicle, and the hydraulic brake system that uses in motor bike or storage battery car at present generally includes operating handle, master cylinder, transport pipe, wheel cylinder, friction lining and brake disc.Wherein master cylinder comprises parts such as the pump housing, plunger, pull back spring and lubricating cup again.Master cylinder as the disclosed hydraulic brake of Chinese patent CN101177138B.This always originally comprises the pump housing, be positioned at the plunger of the pump housing, the big small plunger that plunger is not waited by diameter is arranged before and after successively and is formed, correspondingly plunger cavity is by with above-mentioned little, it is little that big plunger is complementary, big plunger cavity is formed, before, back seal ring lays respectively at little, before huge pillar is divided into beyond the Great Wall and with plunger cavity, in, back cavity volume, the fluid infusion hole is positioned at the rear side of big plunger and links up mutually with the back cavity volume, the fluid infusion hole is connected with lubricating cup on the pump housing, first axial groove of cavity volume and middle cavity volume before while is provided with on the small plunger cavity wall and links up, on big plunger cavity wall, then be provided with second axial groove of cavity volume and back cavity volume in the connection, simultaneously huge pillar also be provided with beyond the Great Wall allow braking liquid therefrom cavity volume flow to the check valve of back cavity volume.Such hydraulic brake master cylinder, operating handle is light, brake weight is big, can satisfy the requirement of braking liquid compensation again, and cost is low, service life is also longer.But such hydraulic brake master cylinder is in order to realize automatic liquid supply, its lubricating cup is positioned on the pump housing, and the lubricating cup volume is bigger, therefore the needed space, grip that whole drg is installed on vehicles such as motor bike or storage battery car is also bigger, and the shape requirement to vehicle is more and more higher now, the headstock handle is also more and smaller and more exquisite, and such hydraulic brake can't be installed in less grip, space, has therefore caused the inconvenience of using.
Summary of the invention
Technical problem to be solved in the utility model is the master cylinder that the less split type hydraulic brake of a kind of volume is provided at above-mentioned prior art present situation.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of hydraulic brake master cylinder is characterized in that: comprise first pump housing that is installed on the grip and with this first pump housing with oil pipe bonded assembly second pump housing;
Described first pump housing comprises plunger cavity and is positioned at first lubricating cup on this first pump housing, be provided with push rod, first plunger and first retracing spring in the described plunger cavity successively, the diameter of the described push rod and first plunger and described plunger cavity are complementary, have one first fluid infusion hole on the plunger cavity of described first retracing spring, one side and be communicated to first lubricating cup, the front end of while at the plunger cavity of the described first retracing spring side has first fluid hole, and the outside of described push rod stretches out in described plunger cavity;
Described second pump housing comprises second lubricating cup that is positioned on described second pump housing and described second pump housing interior diameter varies in size and tandem small plunger chamber and big plunger cavity, the junction of described small plunger chamber and big plunger cavity has the axial groove of a diameter between big plunger cavity and small plunger chamber, has second plunger that diameter and small plunger chamber are complementary in the described big plunger cavity, the diameter foremost of described second plunger is less than described small plunger chamber, have the first protruding circle and the second protruding circle respectively on the part of described second plunger in big plunger cavity, should be separated into preceding cavity volume by big plunger cavity, middle cavity volume and back cavity volume, have the second fluid infusion hole on the wherein preceding cavity volume and be communicated to this second lubricating cup, have inlet opening on the cavity volume of described back, this inlet opening is connected with first fluid hole by above-mentioned oil pipe;
The front end in described small plunger chamber has second fluid hole, and between the front side of described second plunger and described second pump housing, have second retracing spring, described second retracing spring makes the described first protruding circle be positioned at the rear side in the described second fluid infusion hole under initial condition, and described second plunger is positioned at described axial groove foremost simultaneously;
Also has the past cavity volume check valve of cavity volume emptying backward in described second pump housing.The master cylinder of this hydraulic brake adopts and divides body structure, have pressurized construction in second pump housing and can be installed on any position of oil pipe, can reduce the volume of grip first pump housing, the braking effect that the master cylinder of this hydraulic brake not only can provide bigger oil pressure to guarantee drg to wheel cylinder, and compact conformation is small and exquisite.
In order to have better oil pressure in the cavity volume before making before, during and after this between cavity volume the seal isolation better effects if simultaneously described, the rear side of the front side of the described first protruding circle and the described second protruding circle is with first seal ring and second seal ring respectively, described second plunger be with the small sealing ring of diameter between axial groove and small plunger chamber foremost.
Preferably, described check valve is positioned at described second plunger, comprise spool chamber and the spool and the spring that are positioned at spool chamber, described second plunger be positioned at also have on the part of cavity volume before described one radially fuel return hole be communicated with described before cavity volume and spool chamber, described spool chamber is communicated to described cavity volume afterwards.
Preferably, have more performance in order to make the pressurized construction in this second pump housing, bigger oil pressure can be provided, also be with one the 3rd protruding circle on second plunger in the described middle cavity volume, the front side of described the 3rd protruding circle also is with one the 3rd seal ring.
Preferably, connect oil pipe for convenience, the first fluid hole inboard of described first pump housing has nut and connects oil pipe, one end of described first retracing spring is against on described first plunger, the other end is against on the described nut, the inlet opening of described second pump housing and the second fluid hole inboard all have the coupling nut and are connected to oil pipe, and an end of described second retracing spring is against on described second plunger, and the other end is against on the described coupling nut.
In order to make this drg have better oil pressure, described first seal ring and described second seal ring and described small sealing ring are V-shaped seal ring, and the opening of described first seal ring and described small sealing ring forward, and the opening of described second seal ring backward.
Preferably, described the 3rd seal ring is a V-shaped seal ring, and its opening forward.
Compared with prior art, advantage of the present utility model is that the master cylinder of this hydraulic brake is divided into two pump housings, pressurized construction can be positioned over any position that is installed in second pump housing between handle and the wheel cylinder, reduced the volume of grip master cylinder, the master cylinder of this hydraulic brake can be installed in less grip, space, improve the outward appearance of motor bike or storage battery car, and the pressurized construction in second pump housing has guaranteed the performance of hydraulic brake master cylinder, provide higher braking force to brake disc, make this hydraulic brake master cylinder have preferable performance and more optimal structure.
Description of drawings
Fig. 1 is first pump housing of the total basis of hydraulic brake of the present utility model and the structural representation of handle.
Fig. 2 is the cutaway view of first pump housing of hydraulic brake master cylinder of the present utility model.
Fig. 3 is the cutaway view of second pump housing of hydraulic brake master cylinder of the present utility model.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Hydraulic brake master cylinder of the present utility model as Figure 1-3, comprises first pump housing 1 that is positioned at the vehicle handle place, and with second pump housing 2 that is connected with first pump housing, 1 usefulness oil pipe, described second pump housing 2 also is connected to wheel cylinder by oil pipe.Described second pump housing 2 can be installed on any position of the oil pipe between first pump housing 1 and the wheel cylinder.
This first pump housing 1 comprises plunger cavity 11, and be positioned at plunger cavity 11 that be arranged in order with plunger cavity 11 diameters coupling push rod 14, with first plunger 12 and first retracing spring 13 of plunger cavity diameter coupling, one end of described first plunger 12 has push rod 14, the outside of push rod 14 stretches out in outside the plunger cavity 11, and an end of the outside of this push rod 14 and handle leans.The other end of described first plunger 12 has first retracing spring 13, the front end of the plunger cavity 11 of these first retracing spring, 13 sides has first fluid hole, the end inboard that described first pump housing 1 has first retracing spring 13 has nut 111 and is connected with oil pipe, the other end of described first retracing spring 13 just is against on the nut 111, and described first pump housing 1 and first lubricating cup 15 are by the moulding of engineering plastics integrally casting.Be with seal ring 121 on the two ends of described first plunger 12 respectively to seal the braking liquid in first retracing spring, 13 positions, described plunger cavity 11 front sides.On the front side of first plunger 12 of described plunger cavity 11, have the first fluid infusion hole 112 and be connected to first lubricating cup 15 on first pump housing 1.Have braking liquid replenishes braking liquid in plunger cavity 11 loss in first lubricating cup 15, because this first lubricating cup 15 only is used for replenishing the loss of braking liquid, so this first lubricating cup 15 can be for very little, and volume is also very little.All be full of braking liquid in first retracing spring 13 in the described plunger cavity 11 and first lubricating cup 15.
This second pump housing 2 also comprises plunger cavity, and the inconsistent small plunger of diameter chamber 211 and big plunger cavity 212 had second lubricating cup 25 before and after this plunger cavity was divided on this second pump housing 2.The front end that has second plunger, 22, the second plungers 22 in the big plunger cavity 212 has second retracing spring 23, and this second retracing spring 23 is positioned on the coupling nut 213 of inboard that small plunger chamber 211 and its other end be butted on this small plunger chamber 211.The junction that this small plunger chamber 211 connects big plunger cavity 212 has a circle axial groove 217, the diameter in the diameter of described second plunger 22 and described small plunger chamber 211 is complementary, and that is to say the diameter of the diameter of this second plunger 22 less than axial groove 217 and big plunger cavity 212 simultaneously.The diameter foremost of this second plunger 22 is less than described small plunger chamber 212 and be positioned at described axial groove 217, also is with a circle small sealing ring 274 on second plunger 22 in this axial groove 217.Preferably, described small sealing ring 274 is that vee-type seal ring and opening are provided with forward for the cross section.The diameter of this small sealing ring 274 is slightly less than the diameter of this axial groove 217 greater than this small plunger chamber 211.Be provided with the first protruding circle 261 and the second protruding circle 262 respectively successively on the part of described second plunger 22 in big plunger cavity 212, three cavity volumes before, during and after the described first protruding circle 261 and the second protruding circle 262 should big plunger cavity 212 be separated into.The rear end of described back cavity volume has inlet opening, and this inlet opening is connected to first fluid hole on described first pump housing 1 by oil pipe.The front end in described small plunger chamber 211 has second fluid hole, this second fluid hole is connected to wheel cylinder by oil pipe, the inboard, rear and front end of this second pump housing 2, be the front end inboard in the rear end of big plunger cavity 212 and small plunger chamber 211, promptly the inboard of this inlet opening and second fluid hole has coupling nut 213 respectively and is connected to oil pipe, described second pump housing 2 also with this second lubricating cup 25 by the moulding of engineering plastics integrally casting.Wherein on the preceding cavity volume 214 of the first protruding circle, 261 front sides, have the second fluid infusion hole 251 and be communicated to second lubricating cup 25 on this second pump housing 2, all has braking liquid in the cavity volume 214 and second lubricating cup 25 before being somebody's turn to do, and should be communicated with small plunger chambeies 211 by described axial groove 217 by preceding cavity volume 214, also have braking liquid in small plunger chamber 211 and the oil pipe.Should be hollow under initial condition in the middle cavity volume 215, not have any liquid.Preferably, for cavity volume before, during and after sealing is somebody's turn to do better, on second plunger 22 between this first protruding circle 261 and the second protruding circle 262, also be provided with the 3rd protruding circle 263.Preferably, it is vee-type first seal ring 271 and second seal ring 272 that the rear side of the front side of this first protruding circle 261 and this second protruding circle 262 has the cross section respectively, and the opening of this first seal ring 271 forward, the opening of this second seal ring 272 backward, it also is opening V-shaped seal ring forward that the front side of the 3rd protruding circle 263 also has the 3rd seal ring 273, the three seal rings 273.The setting of these seal rings can make in this plunger cavity before, during and after seal isolation better effects if between the cavity volume, and have better pressurized effect and better oil pressure be provided for this wheel cylinder.
Also have on the position of cavity volume 214 before being positioned on this second plunger 22 one radially fuel return hole 221 be communicated to this second plunger, 22 in-to-in check valves 24, this check valve 24 comprises spool 241 and spring 242, be arranged in the spool chamber 222 of second plunger 22, this spool chamber 222 is connected with back cavity volume 216, be used for when check valve 24 is opened, the braking liquid in the preceding cavity volume 214 is circulated to back cavity volume 216.
Before the brake, shown in Fig. 2,3, this first protruding circle 261 is positioned at the rear in this second fluid infusion hole 251, braking liquid in the braking liquid in the preceding cavity volume 214 and second lubricating cup 25 circulates mutually, and the brakings liquid in the preceding cavity volume 214 are communicated to small plunger chamber 211 by axial groove 217, and the oil pipe by 211 front sides, small plunger chamber is delivered to wheel cylinder.During brake, the promotion that the push rod 14 in this first pump housing, 1 outside is subjected to handle is side shifting forward, push rod 14 promotes first plunger 12 forward, this first plunger, 12 compressions, first retracing spring 13, the oil pipe of braking liquid in the plunger cavity 11 of first pump housing 1 by the front end of first pump housing 1 is pushed into second pump housing 2, braking liquid in the oil pipe at the rear of the big plunger cavity 22 of this second pump housing 2 promotes second plunger 22 and moves forward, second plunger 22 compression, second retracing spring 23 moves forward, and the braking liquid before making in the cavity volume 214 is by the fluid infusion hole 251 additional braking liquid that is connected with second lubricating cup 25.Because three cavity volumes before, during and after protruding circle has been divided into big plunger cavity 212, along with moving forward this first protruding circle 261, second plunger 22 can mobile cross the second fluid infusion hole 251, cavity volume 215 during cavity volume 214 can enter before this moment, second lubricating cup, 25 interior brakings liquid can not enter again, and in preceding cavity volume 214 and small plunger chamber 211, set up oil pressure.Along with this second plunger 22 continues to move forward, when this small sealing ring 274 is crossed in the small plunger chamber 211 of these axial groove 217 to second pump housings 2, this small sealing ring 274 and 22 sealings of this second plunger have separated this small plunger chamber 211 and preceding cavity volume 214, therefore in this preceding cavity volume 214, set up oil pressure, along with second plunger 22 continues reach, the volume of cavity volume 214 reduces gradually before described, and oil pressure is increasing.When oil pressure arrived to a certain degree, oil pressure overcame the effect of the spring 242 in the check valve 24, opens check valve 24, the brakings liquid in the preceding cavity volume 214 just by this radially the spool chamber 222 of fuel return hole 221 by check valve 24 flow into releases in the cavity volumes 216 of back.This moment, second plunger 22 just can continue to move forward, and the braking liquid in the preceding cavity volume 214 just is delivered to wheel cylinder by the oil pipe of small plunger chamber 211 and 211 front sides, small plunger chamber, promotes wheel cylinder friction lining is checked brake disc.When brake finished, as long as the operator unclamps handle, first plunger and second plunger under the effect of the spring force of first retracing spring and second retracing spring, were got back to the initial position respectively respectively.The structure that has in this second pump housing 2 is the pressurized construction of this hydraulic brake master cylinder, and being used for provides oil pressure to improve brake weight to wheel cylinder.
The master cylinder of this hydraulic brake has adopted first, second two pump housings, be placed on the pressurized construction of the former pump housing in second pump housing and installation and handle and brake disc between oil pipe on any position, therefore this second pump housing can be installed in other positions of vehicle, in the grip first pump housing only need be installed gets final product, reduced the required installing space of grip greatly, and the pressurized construction of this master cylinder is on second pump housing, can conveniently regulate the supercharging coefficient of this pressurized construction, strengthen the performance of this hydraulic brake.
In addition to the implementation, the utility model also includes other embodiments, and the technical scheme that all employing equivalents or equivalent substitute mode form all should fall within the protection domain of the utility model claim.
Claims (7)
1. hydraulic brake master cylinder is characterized in that: comprise first pump housing (1) that is installed on the grip and with this first pump housing (1) with oil pipe bonded assembly second pump housing (2);
Described first pump housing (1) comprises plunger cavity (11) and is positioned at first lubricating cup (15) on this first pump housing (1), be provided with push rod (14) in the described plunger cavity (11) successively, first plunger (12) and first retracing spring (13), the diameter of described push rod (14) and first plunger (12) and described plunger cavity (11) are complementary, have one first fluid infusion hole (112) on the plunger cavity (11) of described first retracing spring (13) one sides and be communicated to first lubricating cup (15), the front end of while at the plunger cavity (11) of described first retracing spring (13) side has first fluid hole, and the outside of described push rod (14) stretches out in described plunger cavity (11);
Described second pump housing (2) comprises second lubricating cup (25) that is positioned on described second pump housing (2) and described second pump housing (2) interior diameter varies in size and tandem small plunger chamber (211) and big plunger cavity (212), the junction of described small plunger chamber (211) and big plunger cavity (212) has the axial groove (217) of a diameter between big plunger cavity (212) and small plunger chamber (211), has second plunger (22) that diameter and small plunger chamber (211) are complementary in the described big plunger cavity (212), the diameter foremost of described second plunger (22) is less than described small plunger chamber (211), have the first protruding circle (261) and the second protruding circle (262) respectively on the part of described second plunger (22) in big plunger cavity (212), should be separated into preceding cavity volume (214) by big plunger cavity (212), middle cavity volume (215) and back cavity volume (216), have the second fluid infusion hole (251) on the wherein preceding cavity volume (214) and be communicated to this second lubricating cup (25), have inlet opening on the described back cavity volume (216), this inlet opening is connected with first fluid hole by above-mentioned oil pipe;
The front end in described small plunger chamber (211) has second fluid hole, and between the front side of described second plunger (22) and described second pump housing (2), have second retracing spring (23), described second retracing spring (23) makes the described first protruding circle (261) be positioned at the rear side in the described second fluid infusion hole (251) under initial condition, and described second plunger (22) is positioned at described axial groove (217) foremost simultaneously;
Also has the past cavity volume (214) check valve (24) of cavity volume (216) emptying backward in described second pump housing (2).
2. the master cylinder of hydraulic brake as claimed in claim 1, it is characterized in that: the rear side of the front side of the described first protruding circle (261) and the described second protruding circle (262) is with first seal ring (271) and second seal ring (272) respectively, described second plunger (22) be with the small sealing ring (274) of diameter between axial groove (217) and small plunger chamber (211) foremost.
3. hydraulic brake master cylinder as claimed in claim 1, it is characterized in that: described check valve (24) is positioned at described second plunger (22), comprise spool chamber (222) and be positioned at the spool (241) and the spring (242) of spool chamber (222), described second plunger (22) be positioned at also have on the part of cavity volume (214) before described one radially fuel return hole (221) be communicated with described before cavity volume (214) and spool chamber (222), described spool chamber (222) is communicated to described cavity volume (216) afterwards.
4. as each described hydraulic brake master cylinder of claim 1-3, it is characterized in that: also have one the 3rd protruding circle (263) on second plunger (22) in described in the cavity volume (215), the front side of the described the 3rd protruding circle (263) also is with one the 3rd seal ring (273).
5. hydraulic brake master cylinder as claimed in claim 4, it is characterized in that: the first fluid hole inboard of described first pump housing (1) has nut (111) and connects oil pipe, one end of described first retracing spring (13) is against on described first plunger (12), the other end is against on the described nut (111), the inlet opening of described second pump housing (2) and the second fluid hole inboard all have coupling nut (213) and are connected to oil pipe, one end of described second retracing spring (23) is against on described second plunger (22), and the other end is against on the described coupling nut (213).
6. the master cylinder of hydraulic brake as claimed in claim 2, it is characterized in that: described first seal ring (271) and described second seal ring (272) and described small sealing ring (274) are V-shaped seal ring, and the opening of described first seal ring (271) and described small sealing ring (274) forward, and the opening of described second seal ring (272) backward.
7. the master cylinder of hydraulic brake as claimed in claim 4, it is characterized in that: described the 3rd seal ring (273) is a V-shaped seal ring, and its opening forward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200327886U CN201989779U (en) | 2011-01-24 | 2011-01-24 | Master cylinder of hydraulic brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200327886U CN201989779U (en) | 2011-01-24 | 2011-01-24 | Master cylinder of hydraulic brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201989779U true CN201989779U (en) | 2011-09-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200327886U Expired - Fee Related CN201989779U (en) | 2011-01-24 | 2011-01-24 | Master cylinder of hydraulic brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201989779U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104417702A (en) * | 2013-08-27 | 2015-03-18 | 张小红 | Oil pressure disk brake with valve |
| CN104512510A (en) * | 2013-10-01 | 2015-04-15 | 株式会社岛野 | Bicycle hydraulic operating device |
| IT201800008058A1 (en) * | 2018-08-10 | 2020-02-10 | Sunstar Eng Gmbh | HYDRAULIC DRIVE DEVICE FOR A MOTORCYCLE INCLUDING A FLOAT VALVE. |
| WO2023060700A1 (en) * | 2021-10-13 | 2023-04-20 | 浙江欧导自动化设备有限公司 | Electric vehicle disc brake handle having hydraulic compensation function |
-
2011
- 2011-01-24 CN CN2011200327886U patent/CN201989779U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104417702A (en) * | 2013-08-27 | 2015-03-18 | 张小红 | Oil pressure disk brake with valve |
| CN104417702B (en) * | 2013-08-27 | 2017-03-22 | 张小红 | Oil pressure disk brake with valve |
| CN104512510A (en) * | 2013-10-01 | 2015-04-15 | 株式会社岛野 | Bicycle hydraulic operating device |
| CN104512510B (en) * | 2013-10-01 | 2017-12-05 | 株式会社岛野 | Bicycle hydraulic operation equipment |
| IT201800008058A1 (en) * | 2018-08-10 | 2020-02-10 | Sunstar Eng Gmbh | HYDRAULIC DRIVE DEVICE FOR A MOTORCYCLE INCLUDING A FLOAT VALVE. |
| EP3608182A1 (en) * | 2018-08-10 | 2020-02-12 | Sunstar Engineering GmbH | Hydraulic operating device for a cycle or for a motorcycle comprising a float valve |
| US11009049B2 (en) | 2018-08-10 | 2021-05-18 | Sunstar Engineering Gmbh. | Hydraulic operating device for a cycle or for a motorcycle comprising a float valve |
| TWI826499B (en) * | 2018-08-10 | 2023-12-21 | 德商三司達工程有限公司 | Hydraulic operating device for a cycle or for a motorcycle comprising a float valve |
| WO2023060700A1 (en) * | 2021-10-13 | 2023-04-20 | 浙江欧导自动化设备有限公司 | Electric vehicle disc brake handle having hydraulic compensation function |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20120124 |