CN104443015A - Extra-large-cylinder-diameter hydraulic power steering gear with safety valve - Google Patents
Extra-large-cylinder-diameter hydraulic power steering gear with safety valve Download PDFInfo
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- CN104443015A CN104443015A CN201410661537.2A CN201410661537A CN104443015A CN 104443015 A CN104443015 A CN 104443015A CN 201410661537 A CN201410661537 A CN 201410661537A CN 104443015 A CN104443015 A CN 104443015A
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to an extra-large-cylinder-diameter hydraulic power steering gear with a safety valve. The extra-large-cylinder-diameter hydraulic power steering gear is mainly used for heavy-duty freight cars and dumpers special for mines, and comprises a shell, a nut assembly, unloading valves and a safety valve assembly; an inner cavity of the shell is divided by the nut assembly into an upper cavity and a lower cavity, the safety valve assembly is arranged at one end of the position, on one side of the upper cavity, of the shell, an end cover is arranged at the position, in contact with the safety valve assembly, on the side close to the upper cavity, and a tooth-shaped valve sleeve screw is arranged in an inner cavity of the end cover. An input shaft is arranged inside the tooth-shaped valve sleeve screw, the tooth-shaped valve sleeve screw is connected with the nut assembly in a steel ball meshing fit mode, a nut is movably connected with a rocker shaft assembly through a gear rack pair, the unloading valves are installed at the two ends of a steering nut through hole and communicated with the upper cavity and the lower cavity, a safety valve is arranged for limiting the highest pressure of a system, the hydraulic oil circulation temperature drops, and therefore an oil pump is protected. Torque is larger, the cylinder diameter is larger, pressure is higher, parts are better in strength, the overall machine is better in mechanical performance, and the higher safety factors are achieved.
Description
technical fieldthe present invention relates to a kind of automobile steering device, specifically relate to a kind of super large cylinder diameter hydraulic power steering device with safety valve, be mainly used in heavy-duty freight car, mine dump truck dedicated, belong to high-power torque machine field.
Background technology
In recent years along with the fast development of Domestic Automotive Industry, the production level of automobile steering device and using function have had large increase, these high-performance power steerings are very high to its leak tightness, the accuracy requirement of mechanical power transmission part, its power steering is one of important safety parts of automobile, and work must be safe and reliable.
Forwarding motor load carrying ability is larger, and the power of needs is larger, and output torque will be larger, require with high-performance automotive performance and safety more failure-free deflector match with it; Hydraulic power steering device cylinder diameter scope domestic is at present mostly at 70-80mm, the deflector of this medium and small cylinder diameter is spacing little by wheel when motor turning, kinetic energy and impulsive force little, be difficult to be applicable to for heavy-duty freight car, mine dump truck dedicated etc., market outlook are poor; And super large cylinder diameter hydraulic power steering device, because usage condition is harsh, load-carrying is large, and road conditions are bad, many dust, so increase than conventional medium and small cylinder diameter hydraulic power steering device design difficulty; Because the load that is hit is comparatively large, when need consider that operation pressure is too high, diverter body and oil pump is protected, the impact on oil sealing sealing need be considered, and external dust, mud intrusion, thus cause the leakage of hydraulic oil.
Summary of the invention
In view of the defect that above-mentioned technology exists, the object of this invention is to provide a kind of super large cylinder diameter hydraulic power steering device with safety valve, this deflector cylinder diameter is greater than 130mm, moment of torsion is large, cylinder diameter is large, pressure is high, realize part and have better intensity, complete machine has better mechanical characteristics, higher safety factor.
To achieve these goals, the technical solution adopted in the present invention is: a kind of super large cylinder diameter hydraulic power steering device with safety valve, is characterized in that comprising: housing, nut assembly, unloader valve, safety valve body assembly, end cap, input shaft and screw rod assembly, rocker shaft assembly, side cover, casting mold cavity, elongated hole, cover of dust, described unloader valve comprises spool one, valve seat one, valve pocket, spring one and ejector sleeve, described safety valve complement comprises high-voltage oil cavity, mounting hole, steel ball, pad, O-ring seals, spool two, valve seat two, spring perch two, spring two, blanking cover, low pressure oil pocket, described input shaft and screw rod assembly comprise dentation valve pocket screw rod, input shaft, housing cavity is separated into epicoele and cavity of resorption by nut assembly, safety valve complement is provided with at the shell one end of described epicoele side, end cap is provided with in the position contacted with safety valve complement near epicoele side, end cap inner chamber is provided with dentation valve pocket screw rod, input shaft is arranged on dentation valve pocket inside screw, dentation valve pocket screw rod and nut are always shaped as that steel ball is meshing to be connected, nut is flexibly connected with rocker shaft assembly by rack-and-pinion, unloader valve is arranged on the two ends of steering nut through hole, communicate with upper and lower cavity, valve seat one and valve pocket flush fit screw in tapped bore, spool one by compression spring force holds out against valve seat one, spring is firm by ejector sleeve, valve seat two outside thread matches with mounting hole, blanking cover and valve seat two flush fit, depended on pressure press-in valve seat two one end, and be provided with oilhole, this oilhole communicates with high-voltage oil cavity loop, steel ball arranges on fuel feed hole, the elastic force of top Compress Spring two is applied on steel ball and fuel feed hole is blocked, the mounting hole that steel ball runs through valve body communicates with low pressure oil pocket loop, spring perch two screws in valve seat two tapped bore, compressing Compress Spring two produces elastic deformation, the pressure produced is applied on pad and steel ball, leak O-ring seals seals, the oil circuit that casting mold cavity communicates with elongated hole is provided with in housing upper end,
Described end cap and the sealing of input shaft, adopt three lip oil sealings, be added with cover of dust in end cap outside, be provided with V-type oil sealing between end cap and input shaft, is also provided with an outer lip, with input shaft flush fit in V-type oil sealing rear end simultaneously.
On described housing, oil circuit sealing adopts the sealing of non-plug, and sealing means when shell cast, this die cavity is cast out, and reprocessing elongated hole communicates with it.
The described super large cylinder diameter hydraulic power steering device with safety valve, cylinder diameter is greater than 130mm, has spacing and unloading function, during motor turning, spacing different by wheel from medium and small cylinder diameter, and its kinetic energy and impulsive force are very large,
Safety valve screws in deflector valve body mounting hole, the conical surface of blanking cover and the chamfer edge linear contact lay of bottom outlet, make to contact gapless herein by screwing in pressure, reach the effect of sealing fluid force feed, by adjusting the screwing length of spring perch and valve seat screw thread, changing the deflection of Compress Spring, controlling the preload pressure of steel ball, by the contact sealing fluid force feed of steel ball and oilhole, by test, this preload pressure is set smaller than the permission top pressure of oil pump; When flowrate variation, the position of jack-up steel ball changes thereupon, but knots modification is minimum, and the directed varying forces of spring is also very little, therefore, can think that, when steel ball jack-up, the hydraulic fluid pressure entered from high-voltage oil cavity is constant; When during work, the pressure of high-voltage oil cavity is less than the pressure of setting, steel ball can not back down, and entering high-low pressure oil pocket can not communicate; When the pressure of oil-feed loop and high-voltage oil cavity is greater than the pressure of setting, i.e., during the preload pressure of spring, steel ball is backed down, and high and low pressure oil return line can communicate; Thus system pressure reduces, and so circulates, play the effect of protection oil pump.
Hydraulic oil is entered by fuel feed hole, makes hydraulic oil enter the upper and lower cavity of housing by distributing valve, and nut is equivalent to piston up-and-down movement in the large chamber of housing, promotes rocker shaft and rotates, and realizes rocking arm and swings; Fluid control valve adopts steering valve structure, and power steerig pump works with driving engine, oil from oil tank sucking-off to power steering control cock fuel feeding.During without handling maneuver, control cock is in often opens interposition, and oil directly gets back to steering oil reservoir by control cock.
Upper and lower cavity logical oil during work, rotating of steering wheel makes hydraulic reversing valve open, and upper and lower cavity produces difference of pressure and promotes nut motion.If promote nut by epicoele high pressure oil to move to cavity of resorption low pressure oil, the power that the spool of epicoele side overcomes spring force by the effect generation of high pressure oil makes its longitudinal travel, thus is separated with valve seat, and high pressure oil enters unloader valve inner chamber.When nut moves to bottom cavity of resorption, the spool of cavity of resorption clashes into inner walls, producing the application force overcoming spring force makes spool produce longitudinal travel, thus be separated with valve seat, high-low pressure oil pocket communicates, the off-load of high-voltage oil cavity pressure, two cavity pressures are identical, nut motion stops, and reach spacing and the object of off-load, reversing sense as a same reason.
The setting of spacing reference position, namely by mechanical drive under obstructed oil condition, during in-position, spool and valve seat clash into inwall simultaneously, valve seat produces displacement to the inside relative to valve pocket, so just change the position of nut motion when clashing into next time, the namely angle of wheel steering, namely spacing reference position is set.
The invention has the beneficial effects as follows: this deflector compared with prior art, possesses following advantage:
Safety valve is set, restriction system top pressure, reduces the temperature of hydraulic oil circulation, thus protection oil pump; Moment of torsion is larger, and cylinder diameter is larger, pressure is higher, and part has better intensity, and complete machine has better mechanical characteristics, higher safety factor; Adopt three lip oil sealings, leak tightness is high, prevents dust, mud from immersing inner, internally prevent the outside seepage of hydraulic oil, high reliability to outside; Fundamentally stop the hidden danger of plug leakage of oil.Decrease manufacturing procedure, saved plug, improve efficiency, reduced costs.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is unloader valve enlarged drawing in Fig. 1 of the present invention.
Fig. 4 is safety valve structure figure in Fig. 1 of the present invention.
Fig. 5 is safety valve and deflector assembly drowing.
Fig. 6 is the sealing schematic diagram of end cap of the present invention and input shaft.
Fig. 7 is the sealing schematic diagram of oil circuit on inventive shell.
In figure, 1, housing, 2, nut assembly, 3, unloader valve, 4, safety valve body assembly, 5, end cap, 6, input shaft and screw rod assembly, 7, rocker shaft assembly, 8, side cover, 9, casting mold cavity, 10, elongated hole, 11, spool one, 12, valve seat one, 13, valve pocket, 14, spring one, 15, ejector sleeve, 16, high-voltage oil cavity, 17, mounting hole, 18, steel ball, 19, pad, 20, O-ring seals, 21, spool two, 22, valve seat two, 23, spring perch two, 24, spring two, 25, blanking cover, 26, low pressure oil pocket, 27, dentation valve pocket screw rod, 28, input shaft, 29, cover of dust 30, three lip oil sealings.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
Fig. 1-Fig. 7 shows a kind of super large cylinder diameter hydraulic power steering device with safety valve, comprising: housing 1, nut assembly 2, unloader valve 3, safety valve body assembly 4, end cap 5, input shaft and screw rod assembly 6, rocker shaft assembly 7, side cover 8, casting mold cavity 9, elongated hole 10, cover of dust 29, described unloader valve comprises spool 1, valve seat 1, valve pocket 13, spring 1 and ejector sleeve 15, described safety valve body assembly 3 comprises high-voltage oil cavity 16, mounting hole 17, steel ball 18, pad 19, O-ring seals 20, spool 2 21, valve seat 2 22, spring perch 2 23, spring 2 24, blanking cover 25, low pressure oil pocket 26, housing 1 inner chamber is separated into epicoele and cavity of resorption by nut assembly 2, safety valve body assembly 4 is provided with in housing 1 one end of described epicoele side, end cap 5 is provided with in the position contacted with safety valve body assembly 4 near epicoele side, end cap 5 inner chamber is provided with dentation valve pocket screw rod 27, it is inner that input shaft 28 is arranged on dentation valve pocket screw rod 17, dentation valve pocket screw rod 27 and nut assembly 2 form that steel ball is meshing to be connected, nut is flexibly connected with rocker shaft assembly 7 by rack-and-pinion, unloader valve 3 is arranged on the two ends of steering nut 2 through hole, communicate with upper and lower cavity, valve seat 1 and valve pocket 13 flush fit screw in tapped bore, spool 1 by compression spring force holds out against valve seat 1, spring 1 is firm by ejector sleeve 15, valve seat 2 22 outside thread matches with mounting hole 17, blanking cover 25 and valve seat 2 22 flush fit, depended on pressure press-in valve seat 2 22 one end, and be provided with oilhole, this oilhole communicates with high-voltage oil cavity 16 loop, steel ball 18 arranges on fuel feed hole, the elastic force of top Compress Spring 2 24 is applied on steel ball and fuel feed hole is blocked, the mounting hole 17 that steel ball runs through valve body goes back to 26 tunnels with low pressure oil pocket and communicates, spring perch 2 23 screws in valve seat 2 22 tapped bore, compressing Compress Spring 2 24 produces elastic deformation, the pressure produced is applied on pad 19 and steel ball 18, leak O-ring seals 20 seals, the oil circuit that casting mold cavity 9 communicates with elongated hole 10 is provided with in housing 1 upper end,
Described end cap 5 and the sealing of input shaft 28, adopt three lip oil sealings, be added with cover of dust, be provided with V-type oil sealing between end cap 5 and input shaft 28 in end cap 5 outside, be also provided with an outer lip, with input shaft 28 flush fit simultaneously in V-type oil sealing rear end.Material is hydrogenated nitrile-butadiene rubber, and prevent dust, mud from immersing to outside inner, internally prevent the outside seepage of hydraulic oil, compress with hole back-up ring and pad, outside adds cover of dust, thus increases the reliability used.
On described housing 1, oil circuit sealing adopts the sealing of non-plug, and sealing means when shell cast, this die cavity 9 is cast out, and reprocessing elongated hole 10 communicates with it.So just fundamentally stop the hidden danger of plug leakage of oil.Decrease manufacturing procedure, saved plug, improve efficiency, reduced costs.
Safety valve 4 screws in deflector valve body mounting hole 17, the conical surface of blanking cover 25 and the chamfer edge linear contact lay of bottom outlet, make to contact gapless herein by screwing in pressure, reach the effect of sealing fluid force feed, by the screwing length of adjustment spring perch 24 with valve seat 22 screw thread, change the deflection of Compress Spring, control the preload pressure of steel ball 18, by the contact sealing fluid force feed of steel ball and oilhole, by test, this preload pressure is set smaller than the permission top pressure of oil pump.
When flowrate variation, the position of jack-up steel ball 18 changes thereupon, but knots modification is minimum, and the directed varying forces of spring is also very little, therefore, can think that, when steel ball 18 jack-up, the hydraulic fluid pressure entered from high-voltage oil cavity 16 is constant.
When during work, the pressure of high-voltage oil cavity 16 is less than the pressure of setting, steel ball 18 can not back down, and entering high-low pressure oil pocket can not communicate; When the pressure of oil-feed loop and high-voltage oil cavity 16 is greater than the pressure of setting, i.e., during the preload pressure of spring, steel ball 18 is backed down, and high and low pressure oil return line can communicate; Thus system pressure reduces, and so circulates, play the effect of protection oil pump.
Hydraulic oil is entered by fuel feed hole, makes hydraulic oil enter the upper and lower cavity of housing 1 by distributing valve, and nut 2 is equivalent to piston up-and-down movement in the large chamber of housing, promotes rocker shaft 7 and rotates, and realizes rocking arm and swings; Fluid control valve adopts steering valve structure, and power steerig pump works with driving engine, oil from oil tank sucking-off to power steering control cock fuel feeding.During without handling maneuver, control cock is in often opens interposition, and oil directly gets back to steering oil reservoir by control cock.
Upper and lower cavity logical oil during work, rotating of steering wheel makes hydraulic reversing valve open, and upper and lower cavity produces difference of pressure promotion nut 2 and moves.If promote nut by epicoele high pressure oil to move to cavity of resorption low pressure oil, the power that the spool of epicoele side overcomes spring force by the effect generation of high pressure oil makes its longitudinal travel, thus is separated with valve seat, and high pressure oil enters unloader valve 3 inner chamber.When nut 2 moves to bottom cavity of resorption, the spool of cavity of resorption clashes into inner walls, producing the application force overcoming spring force makes spool produce longitudinal travel, thus be separated with valve seat, high-low pressure oil pocket communicates, the off-load of high-voltage oil cavity pressure, and two cavity pressures are identical, nut motion stops, and reaches spacing and the object of off-load.Reversing sense as a same reason.
The setting of spacing reference position, namely by mechanical drive under obstructed oil condition, during in-position, spool and valve seat clash into inwall simultaneously, valve seat produces displacement to the inside relative to valve pocket, so just change the position of nut motion when clashing into next time, the namely angle of wheel steering, namely spacing reference position is set.
Type of drive of the present invention is the vertical circular movement being connected with deflector input end by steering column, output level circular movement after deflector, the plumbing arm swing be attached thereto.Reach and underspeed, increase the object of driving torque.Deflector inside is realized by two-stage transmission, and the first order is screw rod, nut transmission, and the second stage is rack tooth fan transmission.
Claims (6)
1. there is a super large cylinder diameter hydraulic power steering device for safety valve, it is characterized in that comprising: housing, nut assembly, unloader valve, safety valve body assembly, end cap, input shaft and screw rod assembly, rocker shaft assembly, side cover, casting mold cavity, elongated hole, cover of dust, described unloader valve comprises spool one, valve seat one, valve pocket, spring one and ejector sleeve, described safety valve complement comprises high-voltage oil cavity, mounting hole, steel ball, pad, O-ring seals, spool two, valve seat two, spring perch two, spring two, blanking cover, low pressure oil pocket, described input shaft and screw rod assembly comprise dentation valve pocket screw rod, input shaft, housing cavity is separated into epicoele and cavity of resorption by nut assembly, safety valve complement is provided with at the shell one end of described epicoele side, end cap is provided with in the position contacted with safety valve complement near epicoele side, end cap inner chamber is provided with dentation valve pocket screw rod, input shaft is arranged on dentation valve pocket inside screw, dentation valve pocket screw rod and nut are always shaped as that steel ball is meshing to be connected, nut is flexibly connected with rocker shaft assembly by rack-and-pinion, unloader valve is arranged on the two ends of steering nut through hole, communicate with upper and lower cavity, valve seat one and valve pocket flush fit screw in tapped bore, spool one by compression spring force holds out against valve seat one, spring is firm by ejector sleeve, valve seat two outside thread matches with mounting hole, blanking cover and valve seat two flush fit, depended on pressure press-in valve seat two one end, and be provided with oilhole, this oilhole communicates with high-voltage oil cavity loop, steel ball arranges on fuel feed hole, the elastic force of top Compress Spring two is applied on steel ball and fuel feed hole is blocked, the mounting hole that steel ball runs through valve body communicates with low pressure oil pocket loop, spring perch two screws in valve seat two tapped bore, compressing Compress Spring two produces elastic deformation, the pressure produced is applied on pad and steel ball, leak O-ring seals seals, the oil circuit that casting mold cavity communicates with elongated hole is provided with in housing upper end.
2. a kind of super large cylinder diameter hydraulic power steering device with safety valve according to claim 1, it is characterized in that described end cap and the sealing of input shaft, adopt three lip oil sealings, cover of dust is added with in end cap outside, V-type oil sealing is provided with between end cap and input shaft, also be provided with an outer lip in V-type oil sealing rear end, with input shaft flush fit simultaneously.
3. a kind of super large cylinder diameter hydraulic power steering device with safety valve according to claim 1, it is characterized in that on described housing, oil circuit sealing adopts the sealing of non-plug, sealing means when shell cast, this die cavity is cast out, and reprocessing elongated hole communicates with it.
4. a kind of super large cylinder diameter hydraulic power steering device with safety valve according to claim 1, it is characterized in that the described super large cylinder diameter hydraulic power steering device with safety valve, cylinder diameter is greater than 130mm, there is spacing and unloading function, during motor turning, spacing different by wheel from medium and small cylinder diameter, its kinetic energy and impulsive force are very large.
5. a kind of super large cylinder diameter hydraulic power steering device with safety valve according to claim 1, it is characterized in that safety valve screws in deflector valve body mounting hole, the conical surface of blanking cover and the chamfer edge linear contact lay of bottom outlet, make to contact gapless herein by screwing in pressure, reach the effect of sealing fluid force feed, by adjusting the screwing length of spring perch and valve seat screw thread, change the deflection of Compress Spring, control the preload pressure of steel ball, by the contact sealing fluid force feed of steel ball and oilhole, this preload pressure is set smaller than the permission top pressure of oil pump; When flowrate variation, the position of jack-up steel ball changes thereupon, but knots modification is minimum, and the directed varying forces of spring is also very little, therefore, can think that, when steel ball jack-up, the hydraulic fluid pressure entered from high-voltage oil cavity is constant; When during work, the pressure of high-voltage oil cavity is less than the pressure of setting, steel ball can not back down, and entering high-low pressure oil pocket can not communicate; When the pressure of oil-feed loop and high-voltage oil cavity is greater than the pressure of setting, i.e., during the preload pressure of spring, steel ball is backed down, and high and low pressure oil return line can communicate; Thus system pressure reduces, and so circulates, play the effect of protection oil pump.
6. a kind of super large cylinder diameter hydraulic power steering device with safety valve according to claim 1, upper and lower cavity logical oil when it is characterized in that work, rotating of steering wheel makes hydraulic reversing valve open, and upper and lower cavity produces difference of pressure and promotes nut and move; Move if promote nut by epicoele high pressure oil to cavity of resorption low pressure oil, the power that the spool of epicoele side overcomes spring force by the effect generation of high pressure oil makes its longitudinal travel, thus is separated with valve seat, and high pressure oil enters unloader valve inner chamber; When nut moves to bottom cavity of resorption, the spool of cavity of resorption clashes into inner walls, producing the application force overcoming spring force makes spool produce longitudinal travel, thus be separated with valve seat, high-low pressure oil pocket communicates, the off-load of high-voltage oil cavity pressure, and two cavity pressures are identical, nut motion stops, and reaches spacing and the object of off-load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661537.2A CN104443015A (en) | 2014-11-19 | 2014-11-19 | Extra-large-cylinder-diameter hydraulic power steering gear with safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661537.2A CN104443015A (en) | 2014-11-19 | 2014-11-19 | Extra-large-cylinder-diameter hydraulic power steering gear with safety valve |
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| Publication Number | Publication Date |
|---|---|
| CN104443015A true CN104443015A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410661537.2A Pending CN104443015A (en) | 2014-11-19 | 2014-11-19 | Extra-large-cylinder-diameter hydraulic power steering gear with safety valve |
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| CN (1) | CN104443015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112519879A (en) * | 2020-12-16 | 2021-03-19 | 南通环球转向器制造有限公司 | Rotary valve type double-loop semi-integral hydraulic power steering gear |
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| US3935790A (en) * | 1974-02-11 | 1976-02-03 | Trw Inc. | Integral power steering assembly |
| US4367672A (en) * | 1979-07-27 | 1983-01-11 | Zahnradfabrik Friedrichshafen, Ag | Auxiliary power steering, especially for motor vehicles |
| CN101105192A (en) * | 2007-08-03 | 2008-01-16 | 江苏罡阳动力转向器厂 | Built-in over-voltage protective device for hydraulic power steering device |
| CN201116137Y (en) * | 2007-08-03 | 2008-09-17 | 江苏罡阳动力转向器厂 | Hydraulic power steering gear embedded overvoltage protective device |
| CN201526722U (en) * | 2009-08-21 | 2010-07-14 | 沙市久隆汽车动力转向器有限公司 | Safety valve provided with by-pass valve and suitable for power steering gear |
| CN202252193U (en) * | 2010-01-23 | 2012-05-30 | 浙江万达汽车方向机有限公司 | Valve base mechanism of rack piston relief valve of hydraulic power-assisted steering gear of car |
| CN202806861U (en) * | 2012-07-13 | 2013-03-20 | 诸城福田汽车科技开发有限公司 | Unloading valve and power steering gear with same |
| CN202827709U (en) * | 2012-09-10 | 2013-03-27 | 江苏骄阳转向系统有限公司 | Adjustable unloading device |
| CN203172719U (en) * | 2013-04-28 | 2013-09-04 | 河北程杰汽车转向机制造有限公司 | Large-bore power steering device |
| CN203571039U (en) * | 2013-10-18 | 2014-04-30 | 江苏罡阳转向系统有限公司 | Case sealing structure for automobile power steering device |
-
2014
- 2014-11-19 CN CN201410661537.2A patent/CN104443015A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935790A (en) * | 1974-02-11 | 1976-02-03 | Trw Inc. | Integral power steering assembly |
| US4367672A (en) * | 1979-07-27 | 1983-01-11 | Zahnradfabrik Friedrichshafen, Ag | Auxiliary power steering, especially for motor vehicles |
| CN101105192A (en) * | 2007-08-03 | 2008-01-16 | 江苏罡阳动力转向器厂 | Built-in over-voltage protective device for hydraulic power steering device |
| CN201116137Y (en) * | 2007-08-03 | 2008-09-17 | 江苏罡阳动力转向器厂 | Hydraulic power steering gear embedded overvoltage protective device |
| CN201526722U (en) * | 2009-08-21 | 2010-07-14 | 沙市久隆汽车动力转向器有限公司 | Safety valve provided with by-pass valve and suitable for power steering gear |
| CN202252193U (en) * | 2010-01-23 | 2012-05-30 | 浙江万达汽车方向机有限公司 | Valve base mechanism of rack piston relief valve of hydraulic power-assisted steering gear of car |
| CN202806861U (en) * | 2012-07-13 | 2013-03-20 | 诸城福田汽车科技开发有限公司 | Unloading valve and power steering gear with same |
| CN202827709U (en) * | 2012-09-10 | 2013-03-27 | 江苏骄阳转向系统有限公司 | Adjustable unloading device |
| CN203172719U (en) * | 2013-04-28 | 2013-09-04 | 河北程杰汽车转向机制造有限公司 | Large-bore power steering device |
| CN203571039U (en) * | 2013-10-18 | 2014-04-30 | 江苏罡阳转向系统有限公司 | Case sealing structure for automobile power steering device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112519879A (en) * | 2020-12-16 | 2021-03-19 | 南通环球转向器制造有限公司 | Rotary valve type double-loop semi-integral hydraulic power steering gear |
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Application publication date: 20150325 |
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