CN101105192A - Built-in overvoltage protection device of hydraulic power steering gear - Google Patents
Built-in overvoltage protection device of hydraulic power steering gear Download PDFInfo
- Publication number
- CN101105192A CN101105192A CNA2007100255231A CN200710025523A CN101105192A CN 101105192 A CN101105192 A CN 101105192A CN A2007100255231 A CNA2007100255231 A CN A2007100255231A CN 200710025523 A CN200710025523 A CN 200710025523A CN 101105192 A CN101105192 A CN 101105192A
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- valve
- oil
- hydraulic power
- power steering
- safety valve
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- 238000007789 sealing Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The invention discloses a built-in over-pressure protection device of a hydraulic power steering gear, which comprises a valve body, a steering valve core assembly and a safety valve. The safety valve is in a normally closed state and comprises a sealing gasket, a valve rod, a spring, a sliding plate, a steel ball, a sealing ring, a small sealing gasket and a screw plug. An oil drain port is formed in the position, corresponding to the steel ball, of the outer wall of the valve rod, an axial through hole is formed in the screw plug, and the spring abuts against the steel ball through the sliding plate to elastically plug the axial through hole of the screw plug. When the pressure of the inner cavity of the hydraulic power steering gear is larger than a set value, the oil pushes the steel ball through the annular oil groove and the oil hole to cause the sliding block and the spring to displace, and the steel ball contracts inwards to discharge the oil from the oil drainage port through the oil return hole and the annular oil return groove so as to relieve the pressure. When the oil pressure of the inner cavity of the hydraulic power steering gear is less than or equal to the set value of the safety valve, the safety valve is automatically closed under the action of the spring. The invention has compact and simple structure, safety and reliability, and more importantly, the sealing piece is prevented from being damaged by high-pressure oil, the sealing property of the product is improved, and the service life of the product is prolonged.
Description
Technical field
The present invention relates to a kind of overvoltage protective device, specifically, the present invention relates to a kind of overvoltage protective device that is directly arranged on the hydraulic power steering device.
Background technique
Commutator is the core component in the automobile steering system, and its performance directly influences turning to of automobile.Along with developing of automobile industry, the commutator of Purely mechanical is replaced by the hydraulic power steering device of superior performance.Hydraulic power steering device is to turn to by the oil pressure boosting, improves the flexibility of motor turning effectively, and alleviates driver's labor intensity widely.The oil pressure of hydraulic power steering device is from the peripheral hardware hydraulic system, the similar overvoltage protective device that all is provided with to conventional hydraulic system of this hydraulic system.When oil pressure in the system surpassed setting value, overvoltage protective device was in time by the overflow release, with the safe operation of protection hydraulic system.Although prior art can solve the hydraulic system safety problem, in the time of hydraulic power steering device can not in time be solved being diverted to limit position, cause the problem of the instantaneous rising of inner chamber oil pressure because of the load increase.High oil pressure easily causes the damage of part, particularly Sealing is had destructive effects.
Summary of the invention
The present invention is primarily aimed at prior art when being diverted to limit position; because of load increases; the shortcoming of instantaneous rising of its inner chamber oil pressure and release in time, propose a kind of simple in structure, volume is little, reaction is quick, the built-in over-voltage protective device for hydraulic power steering device of definite value release.
The present invention adopts following technical proposals to realize technical goal.
Built-in over-voltage protective device for hydraulic power steering device, it comprises valve body, steering valve core assembly and safety valve.Described valve body inner bore matches with the steering valve core assembly, and the valve body inner bore wall is interval with seal groove and annular oil groove.Improvements are: described valve body left side is installed safety valve, a right-hand end and is provided with filler opening.Safety valve is connected with valve seal by the big end outside thread of valve rod, and small end cooperates with valve seal by seal ring, valve rod intermediate section indent.Linked up by internal oil channel between described filler opening and the annular oil groove, the annular oil groove the other end is linked up safety valve by oilhole, and annular oil-return groove is linked up the drain tap of safety valve by spill port.
In the said structure, safety valve is in closed condition under normal conditions, when being diverted to limit position, increase because of load, make the instantaneous rising of hydraulic power steering device inner chamber oil pressure, steel ball when oil pressure surpasses setting value in the safety valve is by jacking, oil is in time discharged and release from drain tap, avoids the impact of innage pressure to Sealing.When power steering gear inner chamber oil pressure returns to just often, the steel ball in the safety valve cuts out under the promotion of spring automatically.
The present invention compared with prior art has following benefit:
1, overvoltage protective device is set on hydraulic power steering device, compact structure, simple, easy to manufacture;
2, directly control opening or closing of safety valve with hydraulic power steering device inner chamber oil pressure, safe and reliable, automatic performance is good;
3, built-in over-voltage protective device is avoided the destruction of high oil pressure to Sealing, improves the sealing of product, improves the working life of product.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is the safety valve structure schematic representation among the present invention.
Embodiment
Built-in over-voltage protective device for hydraulic power steering device shown in the accompanying drawing 1, it comprises valve body 1, steering valve core assembly 2 and safety valve 3.Seal groove 1.3 and annular oil groove 1.2 are set on described valve body 1 inner hole wall at interval, valve body 1 endoporus is installed steering valve core assembly 2, valve body 1 left-hand end is installed a safety valve 3, right-hand end is provided with filler opening 1.7, safety valve 3 is tightly connected with valve body 1 by valve rod 3.2 big end outside threads and sealing gasket 3.1, valve rod 3.2 small ends are sealed and matched by seal ring 3.6 and valve body 1, valve rod 3.2 intermediate section indents form annular space with valve body 1 section of cooperation, are convenient to drain tap 3.10 and spill port 1.5 and 1.6 communications of annular oil-return groove on valve rod 3.2 walls.Linked up by internal oil channel 1.1 between described filler opening 1.7 and the annular oil groove 1.2, annular oil groove 1.2 the other ends are linked up safety valve 3 by oilhole 1.4.In the present embodiment, the operating oil pressure of hydraulic power steering device is 15Mpa, and it is 17Mpa that safety valve 3 is set the cracking pressure value.When a hydraulic power steering device left side or right steering during to limit position, because of load increases, the instantaneous rising of its inner chamber oil pressure, when in case oil pressure＞safety valve 3 is set the cracking pressure value, high pressure oil promotes steel ball 3.5, drives slide block 3.4 and spring 3.3 displacements by annular oil groove 1.2 and oilhole 1.4, contracts in the steel ball 3.5 oil is discharged and release through spill port 1.5 and annular oil-return groove 1.6 from drain tap 3.10.When hydraulic power steering device inner chamber oil pressure≤safety valve 3 was set the cracking pressure value, safety valve 3 cut out under the effect of spring 3.3 automatically.Overvoltage protective device is directly arranged on the hydraulic power steering device, and compact structure, simple, safe and reliable be the more important thing is and avoided the destruction of high oil pressure to Sealing effectively, has improved the sealing of product, improves product working life.
Claims (3)
1. built-in over-voltage protective device for hydraulic power steering device, it comprises valve body (1), steering valve core assembly (2) and safety valve (3); Described valve body (1) endoporus matches with steering valve core assembly (2), and valve body (1) inner hole wall is interval with seal groove (1.3) and annular oil groove (1.2); It is characterized in that: a safety valve (3) is installed in described valve body (1) left side, and right-hand end is provided with filler opening (1.7); Safety valve (3) holds outside thread and valve body (1) to be tightly connected greatly by valve rod (3.2), and small end is sealed and matched valve rod (3.2) intermediate section indent by seal ring (3.6) and valve body (1); Link up by internal oil channel (1.1) between described filler opening (1.7) and the annular oil groove (1.2), annular oil groove (1.2) the other end is linked up safety valve (3) by oilhole (1.4), and annular oil-return groove (1.6) is linked up the drain tap (3.10) of safety valve (3) by spill port (1.5).
2. built-in over-voltage protective device for hydraulic power steering device according to claim 1, it is characterized in that: described safety valve (3) is in normally off, and it is made up of sealing gasket (3.1), valve rod (3.2) spring (3.3), slide plate (3.4), steel ball (3.5), seal ring (3.6), little sealing gasket (3.7) and plug screw (3.8); The position of corresponding steel ball (3.5) is provided with drain tap (3.10) on described valve rod (3.2) outer wall; Described plug screw (3.8) is provided with axial hole (3.9), and described spring (3.3) withstands the axial hole (3.9) of steel ball (3.5) elasticity shutoff plug screw (3.8) by slide plate (3.4).
3. built-in over-voltage protective device for hydraulic power steering device according to claim 1 is characterized in that: described spring (3.3) is a pressure spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100255231A CN101105192A (en) | 2007-08-03 | 2007-08-03 | Built-in overvoltage protection device of hydraulic power steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100255231A CN101105192A (en) | 2007-08-03 | 2007-08-03 | Built-in overvoltage protection device of hydraulic power steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101105192A true CN101105192A (en) | 2008-01-16 |
Family
ID=38999227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100255231A Pending CN101105192A (en) | 2007-08-03 | 2007-08-03 | Built-in overvoltage protection device of hydraulic power steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101105192A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069844A (en) * | 2010-12-30 | 2011-05-25 | 杭州世宝汽车方向机有限公司 | Rack-and-pinion hydraulic power steering gear with pressure relief device |
| CN103192875A (en) * | 2013-04-16 | 2013-07-10 | 九江学院 | Speed-following overflow valve and utilization method thereof |
| CN104443015A (en) * | 2014-11-19 | 2015-03-25 | 大连瑞谷科技有限公司 | Extra-large-cylinder-diameter hydraulic power steering gear with safety valve |
| CN107651003A (en) * | 2017-08-24 | 2018-02-02 | 芜湖中意液压科技股份有限责任公司 | Hydraulic steering gear vibration suppression device and suppression method for oscillating |
-
2007
- 2007-08-03 CN CNA2007100255231A patent/CN101105192A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069844A (en) * | 2010-12-30 | 2011-05-25 | 杭州世宝汽车方向机有限公司 | Rack-and-pinion hydraulic power steering gear with pressure relief device |
| CN102069844B (en) * | 2010-12-30 | 2012-09-05 | 杭州世宝汽车方向机有限公司 | Rack-and-pinion hydraulic power steering gear with pressure relief device |
| CN103192875A (en) * | 2013-04-16 | 2013-07-10 | 九江学院 | Speed-following overflow valve and utilization method thereof |
| CN104443015A (en) * | 2014-11-19 | 2015-03-25 | 大连瑞谷科技有限公司 | Extra-large-cylinder-diameter hydraulic power steering gear with safety valve |
| CN107651003A (en) * | 2017-08-24 | 2018-02-02 | 芜湖中意液压科技股份有限责任公司 | Hydraulic steering gear vibration suppression device and suppression method for oscillating |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |