CN106015178B - All-hydraulic steering gear with compact safety valve - Google Patents
All-hydraulic steering gear with compact safety valve Download PDFInfo
- Publication number
- CN106015178B CN106015178B CN201610634141.8A CN201610634141A CN106015178B CN 106015178 B CN106015178 B CN 106015178B CN 201610634141 A CN201610634141 A CN 201610634141A CN 106015178 B CN106015178 B CN 106015178B
- Authority
- CN
- China
- Prior art keywords
- safety valve
- opening
- steering gear
- guide sleeve
- compact
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Analytical Chemistry (AREA)
- Safety Valves (AREA)
Abstract
The present invention, which discloses one kind, has compact safety valve all-hydraulic steering gear, the sealing of pressure regulation fastener is blocked in safety valve plug-in opening opening, guide sleeve one end is resisted against on pressure regulation fastener, and the other end has guide cylinder along safety valve plug-in opening is axially extending, and safety valve spring is set in outside guide cylinder；Safe valve core has a plugging block, plugging block against and be blocked on oil inlet passage；Plugging block end face part is prominent and extends in oil inlet passage and forms cylinder band and side wall is provided with two groups of diameter difference oil-through-holes, other end axially across safety valve spring and can be extended to inside guide cylinder formed with cylinder is oriented to along safety valve plug-in opening；Safety valve spring both ends are resisted against on safe valve core and guide sleeve, and safe valve core, safety valve spring, guide sleeve and pressure regulation fastener are coaxial.The all-hydraulic steering gear has the small safety valve of installing space, start-stop performance, favorable sealing property, all-hydraulic steering gear medium-small flow is monitored sensitiveer.
Description
Technical field
The present invention relates to hydraulic test, in particular it relates to the all-hydraulic steering gear with compact safety valve.
Background technology
All-hydraulic steering gear is made up of a pair of rotary valves and a pair turns of stator metering devices.Vehicle is connected to by steering column
On steering wheel, when steering wheel rotates, the oil come from oil pump flows to oil cylinder left or right chamber so as to promote through rotary valve and metering device
Wheel, which is realized, to be turned to.
Wherein, safety valve is the important spare part of all-hydraulic steering gear, for protecting hydraulic circuit.Safety valve connects in elasticity
Normally off is in the presence of fitting, when channel inner pressure exceedes the force value of safety valve spring setting, safety valve opens off-load
Fall unnecessary hydraulic oil, ensure that the operating pressure of Hydraulic Elements in the scope of a safety, is effectively solved because of pressure
Security incident caused by too high.
Existing safety valve requirement on machining accuracy is high, and installing space is excessive, constrains the volume-diminished of Hydraulic Elements；And
Its logical oil mass is larger, when use can cause sensitivity decrease when on low discharge, it is difficult on small displacement all-hydraulic steering gear just
Often work.
Therefore, urgent need to provide a kind of installing space is smaller, start-stop performance is more preferable, traffic monitoring more sensitively have it is compact
The all-hydraulic steering gear of type safety valve.
The content of the invention
It is an object of the invention to provide a kind of all-hydraulic steering gear with compact safety valve, the hydro-steering utensil
There are the safety valve that installing space is small, and safety valve start-stop performance, the favorable sealing property, to the rill in all-hydraulic steering gear
Amount monitoring is sensitiveer.
To achieve these goals, it is compact the invention provides a kind of all-hydraulic steering gear with compact safety valve
Type safety valve is integrated on the housing of all-hydraulic steering gear by safety valve plug-in opening, and formed with entering in safety valve plug-in opening
Oily passage and drainback passage, oil inlet passage are connected with the oil inlet of compact safety valve, drainback passage and compact safety valve
Oil-out be connected；Compact safety valve is made up of safe valve core, safety valve spring, guide sleeve and pressure regulation fastener, its
In,
The sealing of pressure regulation fastener is blocked in the opening of safety valve plug-in opening, and guide sleeve one end is resisted against pressure regulation fastener
On, the other end has guide cylinder along safety valve plug-in opening is axially extending, and safety valve spring is set in outside guide cylinder；
Safe valve core has a plugging block, plugging block against and be blocked on oil inlet passage；Plugging block end face part
Protrude and extend to formation cylinder band and side wall in oil inlet passage and be provided with the different oil-through-hole of two diameters；Other end
Formed with cylinder is oriented to, guide body axially across safety valve spring and can be extended in guide cylinder along safety valve plug-in opening
Portion；
The both ends of safety valve spring are born against on safe valve core and guide sleeve, and safe valve core, safety valve
Spring, guide sleeve and pressure regulation fastener are coaxially disposed.
Preferably, pressure regulation fastener includes fastener body and screw thread, and screw thread is circumferentially disposed on fastener body and leaned on
It can be engaged on one end outer wall of nearly guide sleeve and with the screw thread formed on safety valve plug-in opening inwall.
Preferably, the outer wall section of fastener body caves inward to form ring shaped slot, is provided with ring shaped slot and ring shaped slot
The O-ring being engaged.
Preferably, O-ring is provided with back-up ring close to the open side of safety valve plug-in opening, and O-ring is in high-pressure side, back-up ring
In low-pressure side.
Preferably, the outer wall upper part of guide sleeve caves inward formed with damping hole.
According to above-mentioned technical proposal, the present invention on guide sleeve, passes through safety valve spring by pressure regulation fastener applying power
It is delivered on safe valve core, safe valve core is enclosed in steering gear housing body by the pre-pressing force of safety valve spring, protects
Demonstrate,prove the sealing property during work of Hydraulic Elements normal pressure.When the hydraulic fluid pressure in cavity exceedes safety value scope, oil-feed
Hydraulic oil in passage promotes safe valve core to overcome the pre-pressing force that elastic connection connects, and safe valve core moves up, and hydraulic oil leads to
The hole off-load on safe valve core is crossed in drainback passage, so as to reduce pressure, ensures normal use.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the structural representation of the compact safety valve in a kind of embodiment provided by the invention；
Fig. 2 is the all-hydraulic steering gear with compact safety valve in a kind of embodiment provided by the invention
Assembling schematic diagram.
Description of reference numerals
The safe valve core 2- safety valve springs of 1-
3- guide sleeve 4-O type circles
5- back-up ring 6- pressure regulation fasteners
61- fastener body 62- screw threads
7- housing 71- oil inlet passages
72- drainback passage 31- damping holes
11- oil inlet 12- oil-through-holes
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
In the present invention, in the case where not making opposite explanation, the noun of locality included in term such as " internal, outside " is only
Represent orientation of the term under normal service condition, or be skilled artisan understands that be commonly called as, and be not construed as to this
The limitation of term.
Referring to Fig. 1, the present invention provides a kind of all-hydraulic steering gear with compact safety valve, and compact safety valve passes through
Safety valve plug-in opening is integrated on the housing 7 of all-hydraulic steering gear (as shown in Figure 2), and formed with entering in safety valve plug-in opening
Oily passage 71 and drainback passage 72, oil inlet passage 71 are connected with the oil inlet 11 of compact safety valve, drainback passage 72 with it is tight
The oil-out of type safety valve of gathering is connected；Compact safety valve is by safe valve core 1, safety valve spring 2, guide sleeve 3 and pressure regulation
Fastener 6 forms, wherein,
The sealing of pressure regulation fastener 6 is blocked in the opening of safety valve plug-in opening, and the one end of guide sleeve 3 is resisted against pressure regulation fastener
On 6, the other end has guide cylinder along safety valve plug-in opening is axially extending, and safety valve spring 2 is set in outside guide cylinder；
Safe valve core 1 has a plugging block, plugging block against and be blocked on oil inlet passage；Plugging block end face part
Protrude and extend to formation cylinder band and side wall in oil inlet passage 71 and be provided with the different oil-through-hole 12 of two groups of diameters；It is another
End face axially across safety valve spring 2 and can extend to guiding formed with cylinder, guide body is oriented to along safety valve plug-in opening
Inner barrel；
The both ends of safety valve spring 2 are born against on safe valve core 1 and guide sleeve 3, and safe valve core 1, peace
Full valve spring 2, guide sleeve 3 and pressure regulation fastener 6 are coaxially disposed.
Pass through above-mentioned technical proposal, by the applying power of pressure regulation fastener 6 on guide sleeve 3, transmitted by safety valve spring 2
Onto safe valve core 1, safe valve core 1 is enclosed in steering gear housing 7 by the pre-pressing force of safety valve spring 2, protected
Demonstrate,prove the sealing property during work of Hydraulic Elements normal pressure.When the hydraulic fluid pressure in cavity exceedes safety value scope, oil-feed
Hydraulic oil in passage 71 promotes safe valve core 1 to overcome the pre-pressing force that elastic connection connects, and safe valve core 1 moves up, safety
The different through hole of two groups of diameters is connected with drainback passage 71 on valve core；Hydraulic oil is from oil inlet passage 71 to safe valve core oil-feed
Mouthfuls 11, by the off-load of oil-through-hole 12 of two groups of different-diameters on valve element to drainback passage 72, so as to reduce pressure, ensureing normally
Use.
Above-mentioned safe valve core 1 is sealed using cylinder, improves sealing property, while open more smooth.
In the present embodiment, in order to improve the performance of pressure regulation fastener 6, the same of oil leak is being prevented with good sealing property
When, conveniently it is finely adjusted according to the specific needs of oil pressure size, preferably pressure regulation fastener 6 includes fastener body 61 and screw thread
62, screw thread 62 is circumferentially disposed on fastener body 61 on one end outer wall of guide sleeve 3 and can inserted with safety valve
The fine setting screw thread formed on the inwall of hole is engaged.
In order to further lift the sealing property of whole compact safety valve, the medium for effectively preventing it internal leaks, excellent
Selection of land, the outer wall section of fastener body 61 are caved inward to form ring shaped slot, and the O being engaged with ring shaped slot is provided with ring shaped slot
Type circle 4.
The material of compact safety valve is mostly rigid (such as steel, iron), and O-ring 4 is flexible material (such as rubber), when
Rubber ring easily occurs when O-ring 4 is placed in the cell body of ring shaped slot to be promoted by hydraulic oil, is extruded by the installation gap of safety valve broken
Damage causes oil leak, the sealing property of compact safety valve is had a strong impact on, in order to solve this technical problem, it is preferable that O-ring 4
The side open close to safety valve plug-in opening is provided with back-up ring 5, and O-ring 4, in high-pressure side, back-up ring 5 is in low-pressure side.So, keep off
Circle 5 can directly contact instead of flexible material with rigid material so that O-ring 4 can persistently ensure its sealing function.
Above-mentioned pressure regulation fastener 6 can use the pressure regulation screw plug for taking into account sealing and fastening function, while above-mentioned pressure regulation spiral shell
Stifled sealing position is placed on the top of secure component, effectively solves installation and causes the damaged hidden danger of O-ring.Screw plug simultaneously
On hermetic unit using the combination of O-ring 4 plus back-up ring 5, ensure to improve service life while sealing property.
In order that obtaining guide sleeve 3 plays guide effect and hydraulic damping effect, it is preferable that the outer wall upper part of guide sleeve 3
Cave inward formed with damping hole 31.If the presence without guide sleeve 3, safe valve core 1 directly by safety valve spring 2 and is adjusted
Compress firmware 6 to connect, the situation of side force, build-up of pressure fluctuation and noise can be produced during pressure regulation.Valve element, which is opened, simultaneously will also lack
Weary buffering, causes safety valve pressure to fluctuate, and it is poor to open and close characteristic.Guide sleeve 3 is ensured by coordinating with the small―gap suture of safe valve core 1
What is be oriented to is accurate, and spring force can vertically act on and side force is eliminated on valve element.Damping hole 31 on guide sleeve 3 simultaneously,
Cushioning effect can be played, opens valve element steady.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (4)
1. a kind of all-hydraulic steering gear with compact safety valve, it is characterised in that the compact safety valve passes through safety
Valve plug-in opening is integrated on the housing (7) of the all-hydraulic steering gear, and is led in the safety valve plug-in opening formed with oil-feed
Road (71) and drainback passage (72), the oil inlet passage (71) are connected with the oil inlet (11) of the compact safety valve, institute
The oil-out that drainback passage (72) is stated with the compact safety valve is connected；The compact safety valve is by safe valve core
(1), safety valve spring (2), guide sleeve (3) and pressure regulation fastener (6) composition, wherein,
The pressure regulation fastener (6) sealing is blocked in the opening of the safety valve plug-in opening, described guide sleeve (3) one end against
On the pressure regulation fastener (6), the other end has guide cylinder, the safety valve bullet along the safety valve plug-in opening is axially extending
Spring (2) is set in outside the guide cylinder；
The safe valve core (1) has a plugging block, the plugging block against and be blocked on the oil inlet passage；It is described stifled
Chock end face part it is prominent and extend in the oil inlet passage (71) form cylinder band and side wall be provided with two it is straight
The different oil-through-hole in footpath (12)；Formed with cylinder is oriented to, the lead body can be along the safety valve plug-in opening for other end
Axially across the safety valve spring (2) and extend to inside the guide cylinder；
The both ends of the safety valve spring (2) are born against on the safe valve core (1) and guide sleeve (3), and described
Safe valve core (1), safety valve spring (2), guide sleeve (3) and pressure regulation fastener (6) are coaxially disposed；
The outer wall upper part of the guide sleeve (3) caves inward formed with damping hole (31).
2. the all-hydraulic steering gear according to claim 1 with compact safety valve, it is characterised in that the pressure regulation is tight
Firmware (6) includes fastener body (61) and screw thread (62), and the screw thread (62) is circumferentially disposed at the fastener body
(61) on one end outer wall of the guide sleeve (3) and can be with the screw thread phase that is formed on the safety valve plug-in opening inwall
Coordinate.
3. the all-hydraulic steering gear according to claim 2 with compact safety valve, it is characterised in that the fastener
The outer wall section of body (61) is caved inward to form ring shaped slot, and the O being engaged with the ring shaped slot is provided with the ring shaped slot
Type circle (4).
4. the all-hydraulic steering gear according to claim 3 with compact safety valve, it is characterised in that the O-ring
(4) back-up ring (5) is provided with close to the open side of the safety valve plug-in opening, and the O-ring (4) is in high-pressure side, the gear
(5) are enclosed in low-pressure side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634141.8A CN106015178B (en) | 2016-08-05 | 2016-08-05 | All-hydraulic steering gear with compact safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634141.8A CN106015178B (en) | 2016-08-05 | 2016-08-05 | All-hydraulic steering gear with compact safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106015178A CN106015178A (en) | 2016-10-12 |
| CN106015178B true CN106015178B (en) | 2018-01-30 |
Family
ID=57134364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610634141.8A Expired - Fee Related CN106015178B (en) | 2016-08-05 | 2016-08-05 | All-hydraulic steering gear with compact safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106015178B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203335512U (en) * | 2013-07-08 | 2013-12-11 | 镇江液压有限责任公司 | Hydraulic steering device |
| CN104728481A (en) * | 2015-03-24 | 2015-06-24 | 江苏二马液压元件有限公司 | Safety valve used for diverter |
| CN104896157A (en) * | 2015-05-26 | 2015-09-09 | 芜湖中意液压科技股份有限责任公司 | Direct-acting type safety valve |
| CN204978822U (en) * | 2015-06-19 | 2016-01-20 | 芜湖中意液压科技股份有限责任公司 | Full hydrostatic steering unit of compound measurement |
| CN205059724U (en) * | 2015-10-26 | 2016-03-02 | 江苏罡阳转向系统有限公司 | Take full hydraulic steering of low noise relief valve |
| CN105697832A (en) * | 2016-04-19 | 2016-06-22 | 龙工（上海）精工液压有限公司 | Safety valve with buffer performance |
| CN205858852U (en) * | 2016-08-05 | 2017-01-04 | 芜湖中意液压科技股份有限责任公司 | There is the all-hydraulic steering gear of compact relief valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06219295A (en) * | 1992-12-02 | 1994-08-09 | Koyo Seiko Co Ltd | Power steering device |
-
2016
- 2016-08-05 CN CN201610634141.8A patent/CN106015178B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203335512U (en) * | 2013-07-08 | 2013-12-11 | 镇江液压有限责任公司 | Hydraulic steering device |
| CN104728481A (en) * | 2015-03-24 | 2015-06-24 | 江苏二马液压元件有限公司 | Safety valve used for diverter |
| CN104896157A (en) * | 2015-05-26 | 2015-09-09 | 芜湖中意液压科技股份有限责任公司 | Direct-acting type safety valve |
| CN204978822U (en) * | 2015-06-19 | 2016-01-20 | 芜湖中意液压科技股份有限责任公司 | Full hydrostatic steering unit of compound measurement |
| CN205059724U (en) * | 2015-10-26 | 2016-03-02 | 江苏罡阳转向系统有限公司 | Take full hydraulic steering of low noise relief valve |
| CN105697832A (en) * | 2016-04-19 | 2016-06-22 | 龙工（上海）精工液压有限公司 | Safety valve with buffer performance |
| CN205858852U (en) * | 2016-08-05 | 2017-01-04 | 芜湖中意液压科技股份有限责任公司 | There is the all-hydraulic steering gear of compact relief valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106015178A (en) | 2016-10-12 |
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