CN201856754U - Hydraulic brake master pump - Google Patents
Hydraulic brake master pump Download PDFInfo
- Publication number
- CN201856754U CN201856754U CN2010205701861U CN201020570186U CN201856754U CN 201856754 U CN201856754 U CN 201856754U CN 2010205701861 U CN2010205701861 U CN 2010205701861U CN 201020570186 U CN201020570186 U CN 201020570186U CN 201856754 U CN201856754 U CN 201856754U
- Authority
- CN
- China
- Prior art keywords
- plunger
- cavity
- seal ring
- hole
- pump housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The utility model relates to a hydraulic brake master pump, which comprises a pump body, an oil cup, a plunger, a front sealing ring, a rear sealing ring and a return spring, wherein the oil cup is arranged on the pump body; the plunger is arranged in a plunger cavity; the plunger comprises a big plunger and a small plunger integrated with the big plunger; the front sealing ring and the rear sealing ring are respectively positioned on the small plunger and the big plunger to divide the plunger cavity into a front accommodating chamber, a middle accommodating chamber and a rear accommodating chamber; the pump body is provided with a fluid supplementation hole and a fluid outlet hole; one end of the fluid supplementation hole is communicated with the plunger cavity; the other end of the fluid supplementation hole is communicated with the oil cup; the fluid outlet hole is positioned at the front end part of the plunger cavity; the inner wall of the plunger cavity is provided with a first axial groove communicated with the front accommodating chamber and the middle accommodating chamber; and the pump body is provided with a check valve which allows brake fluid to flow to the oil cup from the middle accommodating chamber. Compared with the prior art, the hydraulic brake master pump has the advantage that the check valve is independent of the plunger to be arranged in the oil cup and is combined and integrated with the big plunger and the small plunger, so that the overall structure is simple and the hydraulic brake master pump is convenient to process and finely assemble.
Description
Technical field
The utility model relates to a kind of drg master cylinder, specifically refers to a kind of applicable to the hydraulic brake master cylinder on the current instruments such as motor bike, beach buggy.
Background technology
At present, hydraulic brake system on motor bike and beach buggy is made up of operating handle, master cylinder, transport pipe, wheel cylinder, friction lining and brake disc usually, wherein, master cylinder comprises the pump housing, plunger, pull back spring and lubricating cup again, as Chinese Granted publication number for " the motorcycle hydraulic brake gear " of CN2245030Y just disclosed so a kind of master cylinder, in this master cylinder, plunger is provided with forward and backward two seals circle, plunger and pull back spring are positioned at the plunger cavity of the pump housing, and pull back spring makes plunger have the trend of past operating handle direction side shifting all the time.Simultaneously also be provided with fluid hole and the fluid infusion hole of linking up mutually with plunger cavity on the pump housing, fluid hole is positioned at the front portion of plunger cavity, connects for transport pipe.The fluid infusion hole is located at the middle part of plunger cavity, is communicated in lubricating cup, and under state of nature, the fluid infusion hole is adjacent to preceding seal ring.During use,, make plunger advancement with hand pressing operation handle.After the preceding seal ring of plunger slips over the fluid infusion hole, in plunger cavity, begin to produce oil pressure, braking liquid promotes the piston reach in the wheel cylinder in transport pipe enters wheel cylinder, finally force friction lining that brake disc is checked, thereby realize the purpose of drag.
But in use there are a lot of weak points:
(1) because during processing fluid infusion hole, its with the cross surface mutually of plunger cavity on can stay the technology burr, though by the postorder processing, such defective can weaken to some extent, but still can't eradicate burr fully.And in the crank motion process of plunger, the preceding seal ring that is positioned at its front end must pass through this fluid infusion hole, and therefore, under the effect of burr, the wearing and tearing with seal ring before accelerating widely make brake system shift to an earlier date malfunctioning and reduction of service life.
(2) because the propulsive effort of plunger comes from the rotary thrust of operating handle, obviously, the direction of this rotary thrust is not to apply along the plunger line of centers.This rotary thrust can produce a side force to the plunger cavity wall.And the existing pump housing and plunger adopt aluminum alloy or zinc alloy casting to form mostly, therefore, under the double action of this material and side force, will increase the weight of the friction between plunger and plunger cavity inwall, seal ring and the plunger cavity inwall, thereby accelerate the wearing and tearing of each contact surface.Period of service one is long, the braking liquid seepage phenomenon of trace can occur at seal ring place, back, and thereupon, braking liquid corrodes the pump housing at this place and produces oxide, and it is big finally to make plunger promote resistance, very flexible, and cause brake system malfunctioning potential safety hazard too early.
(3) before plunger cavity begins to set up oil pressure, because this hydraulic brake system must compensate the braking liquid that required braking liquid, the residual air of braking liquid, oil pipe expansion that preceding seal ring moves to the fluid infusion hole compresses required braking liquid and overcome friction lining return amount in advance, therefore this requires the diameter of plunger cavity can not make too little, otherwise behind the above-mentioned braking liquid of compensation, the stroke of plunger is not enough to brake disc is checked.And when the pressing operation handle,, necessarily require the diameter of plunger cavity to make the smaller the better again in order to have the performance that feel is light, brake weight is big.For this operating needs, existing master cylinder also can't reach preferably.
For this reason, prior art provides a kind of improved hydraulic brake master cylinder, see that the patent No. is the Chinese invention patent " hydraulic brake master cylinder " (Granted publication number for CN101177138B) of ZL200610124609.X, this patent is by the improvement to plunger and plunger cavity, well solved above-mentioned technical matters, the purpose of pressure release has also been satisfied in the design of while check valve between big plunger and small plunger.
But also there is following deficiency in the technical scheme after improving: at first, because check valve is arranged at big plunger and small plunger junction, the production and assembly accuracy requirement is higher, assemble cumbersome, secondly, the oil pressure that check valve can be controlled also is changeless, can not adapt to multiple demand; Secondly, the design of second axial groove is comparatively complicated, is not easy to product processing, and the oil pressure transmission of simultaneously big plunger can only wait the back seal ring to cross second axial groove and just can work, and reacts slower; Once more, large and small plunger designs for split, assembling then, and assembling back precision is not high, and installs loaded down with trivial detailsly, influences work efficiency; At last, large and small plunger all adopts engineering plastics, and the reaction of hydraulic pressure appears unusually in this plunger easy deformation in pressure environment, and influence is normally used.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of simple in structure, hydraulic brake master cylinder efficiently easy to assembly at the above-mentioned state of the art.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of hydraulic brake master cylinder, comprise the pump housing, be located at the lubricating cup on the pump housing, be arranged at the plunger that can move around in the plunger cavity of the pump housing, preceding seal ring, back seal ring and can make the pull back spring of plunger return, aforesaid plunger comprises big plunger and is located at the small plunger of this big plunger leading section, aforesaid preceding seal ring lays respectively at described small plunger with the back seal ring and huge pillar is separated into preceding cavity volume with described plunger cavity beyond the Great Wall, middle cavity volume and back cavity volume, the described pump housing is provided with fluid infusion hole and fluid hole, this fluid infusion hole one end communicates with plunger cavity, the other end communicates with lubricating cup, aforesaid fluid hole is positioned at the leading section of plunger cavity, first axial groove of cavity volume and middle cavity volume before described plunger cavity inwall is provided with and is communicated with, under the initial condition, seal ring is positioned at the above-mentioned first axial groove place before described, it is characterized in that one-body molded of described big plunger and small plunger, and, the described pump housing be provided with one allow braking liquid therefrom cavity volume flow to the check valve of lubricating cup, under the initial condition, described back seal ring be arranged in the fluid infusion hole the centre and simultaneously backward cavity volume and cavity volume for braking liquid.
As preferably, the installation cavity that the described pump housing has a unidirectional hole and communicates with unidirectional hole, described check valve comprises plug, the retracing spring of being located at unidirectional hole and can regulate the regulating part of retracing spring shape amount, aforesaid retracing spring is positioned at installation cavity and bottom and plug and offsets, and the top then is provided with aforesaid regulating part.When oil pressure acquired a certain degree, check valve was opened, and is used for pressure release, and regulating part can be regulated oil pressure value.
Described fluid infusion hole is oval.
The described pump housing is positioned at inside edge, fluid infusion hole and forms fillet.The long-time use, back seal ring is at place, fluid infusion hole, and is not easy to wear, more durable.
When described back seal ring moved forward through the fluid infusion hole, described preceding seal ring was in the first axial groove place.
Compared with prior art, advantage of the present utility model is: be arranged in the lubricating cup owing to check valve is independent of plunger, one-body molded in conjunction with big plunger and small plunger, integral structure is simpler, the processing assembling is more convenient, matching relationship between fluid infusion hole and the back seal ring has been simplified the design of plunger cavity greatly simultaneously, is convenient to the forming work of the pump housing, and hydrostatic drive simultaneously more rapidly effectively.
Description of drawings
Fig. 1 is an embodiment initial condition structural representation.
Fig. 2 is an embodiment working state structure scheme drawing.
Fig. 3 is an embodiment application state structural representation.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, hydraulic brake master cylinder in the present embodiment comprises the pump housing 1, be located at lubricating cup 2 on the pump housing 1, be arranged at plunger, preceding seal ring 62, back seal ring 61 that can move around in the plunger cavity of the pump housing 1 and the pull back spring 7 that can make plunger return, pull back spring 7 one ends and plunger offset, the other end is arranged on the spring perch 8, plunger comprises big plunger 41 and is located at the small plunger 42 of these big plunger 41 leading sections, big plunger 41 and 42 one-body molded of small plungers are metal material.The pump housing 1 forms the leg 15 of projection, and leg 15 port cap are provided with bowl cover 21, and leg 15 and bowl cover 21 are formed lubricating cup 2.
Before seal ring 62 and back seal ring 61 lay respectively on small plunger 42 and the big plunger 41 and cavity volume 1a, middle cavity volume 1b and back cavity volume 1c before plunger cavity is separated into, the pump housing 1 is provided with fluid infusion hole 11 and fluid hole 12, these fluid infusion hole 11 1 ends communicate with plunger cavity, the other end communicates with lubricating cup 2, fluid hole 12 is positioned at the leading section of plunger cavity, also is provided with seal ring 51 and seal ring 52 around big plunger rearward end.
First axial groove 14 of cavity volume 1a and middle cavity volume 1b before the plunger cavity inwall is provided with and is communicated with, under initial condition, preceding seal ring 62 is positioned at first axial groove, 14 places, and back seal ring 61 is positioned at the centre in fluid infusion hole 11, makes the braking liquid in the lubricating cup 4 mend braking liquid for simultaneously back cavity volume 1c and middle cavity volume 1b.When back seal ring 61 moved forward through fluid infusion hole 11, preceding seal ring 62 was in first axial groove, 14 places.
The pump housing 1 be provided with one allow braking liquid therefrom cavity volume 1b flow to the check valve 3 of lubricating cup.
The installation cavity that the pump housing 1 has a unidirectional hole 13 and communicates with unidirectional hole 13, installation cavity is made up of leg 15 and retaining wall 17.Check valve 3 comprises plug 33, the retracing spring 32 of being located at unidirectional hole 13 and the regulating part 31 that can regulate retracing spring 32 deflections, and retracing spring 32 is positioned at installation cavity and bottom and plug 33 and offsets, and the top then is provided with regulating part 31.Regulating part 31 in the present embodiment adopts governing screw.Fluid infusion hole 11 is oval (do not have among the figure and show), because the pump housing 1 is the engineering plastics processing, thus can carry out rounding 111 (seeing shown in Figure 1) design at 11 places, fluid infusion hole, the long-time use, back seal ring 61 is not easy to wear, more durable.
During use, braking liquid in the lubricating cup can pass through fluid infusion hole, back cavity volume, middle cavity volume, first axial groove additional braking liquid in brake system successively, in conjunction with shown in Figure 3, hydraulic brake master cylinder 100 and operating handle 102 all are installed on the handlebar 101, when normal braking, pressing operation handle 102, operating handle 102 promotes large and small plunger advancement, braking liquid through primary shaft before concentrated flow is gone in the cavity volume, and supply with required compensation braking liquid apace by transport pipe, friction lining is in and the contacted state of brake disc.Because the check valve of this moment is still closed, therefore in middle cavity volume and preceding cavity volume, set up oil pressure, and the braking liquid in the middle cavity volume flows into still in the preceding cavity volume through first axial groove.Immediately, preceding seal ring also slips over first axial groove, and the braking liquid in the middle cavity volume flows in the preceding cavity volume by preceding seal ring.
In the middle of oil pressure in the cavity volume when reaching the oil pressure that check valve sets, overcome the retracing spring of check valve, move after making plug, braking liquid then enters lubricating cup.The rotation regulating part can change the oil pressure value of check valve.
In case unclamp operation handle, each plunger is retracted into initial position apace under the effect of pull back spring, the braking liquid of internal system keeps balance by first axial groove, middle cavity volume, fluid infusion hole, lubricating cup and barometric pressure, simultaneously, the braking liquid in the lubricating cup mends braking liquid can for back cavity volume and middle cavity volume.Go round and begin again like this, realize brake function.
Claims (5)
1. hydraulic brake master cylinder, comprise the pump housing (1), be located at the lubricating cup (2) on the pump housing (1), be arranged at the plunger that can move around in the plunger cavity of the pump housing (1), preceding seal ring (62), back seal ring (61) and can make the pull back spring (7) of plunger return, aforesaid plunger comprises big plunger (41) and is located at the small plunger (42) of this big plunger (41) leading section, aforesaid preceding seal ring (62) and back seal ring (62) lay respectively on described small plunger (42) and the big plunger (41) and described plunger cavity are separated into preceding cavity volume (1a), middle cavity volume (1b) and back cavity volume (1c), the described pump housing (1) is provided with fluid infusion hole (11) and fluid hole (12), these fluid infusion hole (11) one ends communicate with plunger cavity, the other end communicates with lubricating cup (2), aforesaid fluid hole (12) is positioned at the leading section of plunger cavity, first axial groove (14) of cavity volume (1a) and middle cavity volume (1b) before described plunger cavity inwall is provided with and is communicated with, under the initial condition, described preceding seal ring (62) is positioned at above-mentioned first axial groove (14) and locates, it is characterized in that one-body molded of described big plunger (41) and small plunger (42), and, the described pump housing (1) be provided with one allow braking liquid therefrom cavity volume (1b) flow to the check valve (3) of lubricating cup, under the initial condition, described back seal ring (61) is arranged in the centre in fluid infusion hole (61) and cavity volume (1c) and cavity volume (1b) confession braking liquid backward simultaneously.
2. hydraulic brake master cylinder according to claim 1, it is characterized in that the installation cavity that the described pump housing (1) has a unidirectional hole (13) and communicates with unidirectional hole (13), described check valve (3) comprises the regulating part (31) of being located at plug (33), the retracing spring (32) in the unidirectional hole (13) and regulating retracing spring (32) deflection, aforesaid retracing spring (32) is positioned at installation cavity and bottom and plug (33) and offsets, and the top then is provided with aforesaid regulating part (31).
3. hydraulic brake master cylinder according to claim 1 and 2 is characterized in that described fluid infusion hole (11) is for oval.
4. hydraulic brake master cylinder according to claim 3 is characterized in that the described pump housing (1) is positioned at inside edge, fluid infusion hole (11) and forms fillet (111).
5. hydraulic brake master cylinder according to claim 1, when it is characterized in that described back seal ring moves forward through the fluid infusion hole, described preceding seal ring is in the first axial groove place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205701861U CN201856754U (en) | 2010-10-19 | 2010-10-19 | Hydraulic brake master pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205701861U CN201856754U (en) | 2010-10-19 | 2010-10-19 | Hydraulic brake master pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201856754U true CN201856754U (en) | 2011-06-08 |
Family
ID=44102570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205701861U Expired - Fee Related CN201856754U (en) | 2010-10-19 | 2010-10-19 | Hydraulic brake master pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201856754U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979264A (en) * | 2010-10-19 | 2011-02-23 | 罗定 | Hydraulic brake master pump |
| CN104512510A (en) * | 2013-10-01 | 2015-04-15 | 株式会社岛野 | Bicycle hydraulic operating device |
| 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 |
-
2010
- 2010-10-19 CN CN2010205701861U patent/CN201856754U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979264A (en) * | 2010-10-19 | 2011-02-23 | 罗定 | Hydraulic brake master pump |
| 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 |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201086705Y (en) | Master pump structure | |
| CN201856754U (en) | Hydraulic brake master pump | |
| CN201588888U (en) | Novel hydraulic clutch slave cylinder | |
| CN203412989U (en) | Plastic hydraulic cylinder of automobile clutch | |
| CN101177138B (en) | Novel hydraulic brake master cylinder | |
| CN203926500U (en) | The clutch master cylinder of tape guide ring structure | |
| CN101979264A (en) | Hydraulic brake master pump | |
| CN200967470Y (en) | Novel hydro-mechanical brake master cylinder | |
| CN202451659U (en) | Vacuum booster pump and clutch main pump | |
| CN210734125U (en) | Hydraulic booster assembly device with pre-charging function | |
| CN201989779U (en) | Master cylinder of hydraulic brake | |
| CN205956246U (en) | Plunger type clutch wheel cylinder | |
| CN103104632B (en) | Plunger-type clutch master cylinder | |
| CN104963960A (en) | Automobile clutch master cylinder | |
| CN207120740U (en) | A kind of master cylinder and its brakes | |
| CN201923116U (en) | Brake master pump for engineering machinery | |
| CN204041775U (en) | A kind of eccentric abrasion prevention plunger-type clutch master cylinder | |
| CN207246283U (en) | A kind of clutch boost pump | |
| CN207261508U (en) | Clutch force aid system | |
| CN201109428Y (en) | Motorcycle rear braking pump | |
| CN209539667U (en) | Quick-pressurizing oil cylinder | |
| CN218703192U (en) | Hydraulic braking master cylinder | |
| CN204828115U (en) | But device of automatically regulated inserted valve aperture | |
| CN202301580U (en) | Self-oil supply type clutch assembly | |
| CN214929655U (en) | Flow divider valve for motor vehicle braking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110608 Termination date: 20131019 |