CN103879445A - Steering control valve for heavy recirculating ball steering gear - Google Patents
Steering control valve for heavy recirculating ball steering gear Download PDFInfo
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- CN103879445A CN103879445A CN201410094393.7A CN201410094393A CN103879445A CN 103879445 A CN103879445 A CN 103879445A CN 201410094393 A CN201410094393 A CN 201410094393A CN 103879445 A CN103879445 A CN 103879445A
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- input shaft
- screw rod
- oil groove
- control valve
- steering gear
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Abstract
The invention relates to the field of a heavy recirculating ball steering gear, and discloses a steering control valve for the heavy recirculating ball steering gear. The steering control valve comprises a valve body, an upper cap, a screw, a torsion bar and an input shaft, wherein one end of the torsion bar is connected with the input shaft, the torsion bar is fixed into the screw through a cylindrical pin, the circumference of the outer wall of the input shaft is provided with an input shaft oil groove which is formed in the axial direction of the input shaft, and the circumference of the inner wall of the screw is provided with a screw oil groove matched with the input shaft oil groove; the screw and the input shaft form a rotary valve, the screw and the input shaft can rotate relatively, a rotary valve oil channel is formed between the input shaft oil groove and the screw oil groove, the center of the screw is provided with a through hole, and an oil channel is formed between the through hole and the input shaft oil groove. The steering control valve is compact in structure, small in size, low in weight, uniform in force borne by bearings, not prone to being damaged, long in service life, and particularly suitable for high-pressure large-flow large-output-torque heavy recirculating ball steering gears.
Description
Technical field
The present invention relates to recirculating ball power steering gear field, related in particular to a kind of steering control valve for heavy ball-and-nut steering gear.
Background technology
Autotruck steering swivel system has generally been installed recirculating ball power steering gear, and power-assisted is provided in the time of motor turning.Oil groove and oilhole are offered in such deflector on input shaft and screw rod, and oil groove and oilhole complement each other to form rotary valve, open or close power-assisted oil circuit in the time of chaufeur steering wheel rotation, and while realizing chaufeur steering wheel rotation, deflector provides " servo " power-assisted.
The automobile that load-carrying is larger, front axle load is larger, and the booster torquemoment that needs recirculating ball power steering gear to provide is larger.Conventional rotary valve in the market, its working pressure is 10-14Mpa, the output torque that is suitable for recirculating ball power steering gear is 1000-5000N.m.Be subject to the structural limitations of recirculating ball power steering gear, its output torque is larger, and rotary valve bearing is subject to from the axial force of screw rod larger, and meanwhile, oad also can be larger.In the time that its output torque reaches 6000N.m, if according to existing rotary valve design, its oad is excessive, and weight is large, and shaft strength carrying is uneven, easily damage, very unfavorable to product design, meanwhile, in order to save material, the operation pressure that conventionally need to improve recirculating ball power steering gear, reduces its weight.Therefore, be applicable at present the rotary valve structure of low pressure, low output torque, be unsuitable for the recirculating ball power steering gear of high pressure, large output torque.
Summary of the invention
The present invention is directed to the defect that prior art exists, a kind of recirculating ball power steering gear control cock that is applicable to high pressure, large flow, large output torque is provided.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
For the steering control valve of heavy ball-and-nut steering gear, comprise valve body, upper cover, screw rod, torsion bar and input shaft, one end of described torsion bar is connected with input shaft, torsion bar is fixed in screw rod by straight pin, on the outer wall periphery of described input shaft, be provided with input shaft oil groove, input shaft oil groove axially arranges along input shaft, is provided with the screw rod oil groove matching with input shaft oil groove on the inwall periphery of described screw rod; Described screw rod and input shaft form rotary valve, between screw rod and input shaft, can relatively rotate, and between input shaft oil groove and screw rod oil groove, form rotary valve oil duct, and described screw rod center is provided with through hole, between through hole and input shaft oil groove, is provided with oil duct.
As preferably, on described valve body, be provided with fuel feed hole, described fuel feed hole is connected with rotary valve oil duct, because valve body fuel feed hole and screw rod oil groove " elongated " oil duct length shorten, logical oily drag reduction, the hydraulic oil that is conducive to large flow flows through.
As preferably, the large end of described screw rod is provided with annular boss, between annular boss and valve body, is provided with surface bearing, and surface bearing is fixed by the annular boss on faced washer and screw rod, valve body place bearing adopts surface bearing, has increased bearing to the load-carrying capacity from screw axial power; Between described valve body and upper cover, by thread connection, the packing ring that upper cover can clamping plane bearing place, regulates the gap of surface bearing.
As preferably, one end of described input shaft is input end, and the other end is mouth, and the input end of input shaft is for connecting spline, and described input shaft oil groove is arranged on the outer wall periphery of input shaft mouth vertically.
As preferably, quantity Wei Liu Dao Huo eight roads of described input shaft oil groove and screw rod oil groove, evenly lay.
As preferably, described screw jacket is provided with sleeve, between described sleeve and screw rod, is provided with back-up ring.
As preferably, described screw rod tail is provided with fuel return hole, and oil scavenger is installed at fuel return hole place, and the through hole that screw rod center arranges is connected with fuel return hole, and this design takes full advantage of the inner space of screw rod.
As preferably, the seal ring adopting in described valve body adopts high-pressure anti-wear seal ring, and above-mentioned design has increased the working pressure of rotary valve.
As preferably, cover on described compound type anti-dust seal is set, make rotary valve work not polluted by introduced contaminants.
The present invention, owing to having adopted above technical scheme, has significant technique effect:
Compact conformation of the present invention, oad is little, lightweight, shaft strength carrying evenly, is not easy to damage long service life, be particularly suitable for the recirculating ball power steering gear of high pressure, large flow, large output torque, its applicable pressure can reach 20Mpa, controls flow and is greater than 25l/min, more than applicable deflector output torque reaches 6000N.m.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the part-structure I enlarged diagram of Fig. 1.
Fig. 3 is the schematic cross-section of the A-A face of Fig. 1.
Fig. 4 is steering control valve input torque-delivery pressure graph of relation of the present invention.
The specific embodiment
The present invention is described in further detail with embodiment below in conjunction with accompanying drawing 1 to accompanying drawing 4:
For the steering control valve of heavy ball-and-nut steering gear, as shown in Figure 1 to Figure 3, comprise valve body 1, upper cover 2, screw rod 3, torsion bar 4 and input shaft 5, compound type anti-dust seal 13 is set on upper cover 2, can make rotary valve work not polluted by introduced contaminants.One end of described torsion bar 4 is connected with input shaft 5, torsion bar 4 is fixed in screw rod 3 by straight pin 6, on the outer wall periphery of described input shaft 5, be provided with input shaft oil groove 51, input shaft oil groove 51 axially arranges along input shaft 5, is provided with the screw rod oil groove 31 matching with input shaft oil groove 51 on the inwall periphery of described screw rod 3; One end of described input shaft 5 is input end, the other end is mouth, and the input end of input shaft 5 is for connecting spline, and described input shaft oil groove 51 is arranged on the outer wall periphery of input shaft 5 mouths vertically, quantity Wei Liu Dao Huo eight roads of input shaft oil groove 51 and screw rod oil groove 31, evenly lay.Described screw rod 3 forms rotary valve with input shaft 5, between screw rod 3 and input shaft 5, can relatively rotate, between input shaft oil groove 51 and screw rod oil groove 31, form rotary valve oil duct, described screw rod 3 centers are provided with through hole 32, between through hole 32 and input shaft oil groove 51, are provided with oil duct 7.On valve body 1, be provided with fuel feed hole 11, described fuel feed hole 11 is connected with rotary valve oil duct, and the seal ring 12 adopting in valve body 1 all adopts high-pressure anti-wear seal ring.The large end of described screw rod 3 is provided with annular boss 33, between annular boss 33 and valve body 1, is provided with surface bearing 34, and surface bearing 34 is fixing with the annular boss 33 on screw rod 3 by faced washer 35; Between described valve body 1 and upper cover 2, by thread connection, the packing ring 35 that upper cover 2 can clamping plane bearing 34 places, regulates the gap of surface bearing.Described screw rod 3 is outer is arranged with sleeve 8, between described sleeve 8 and screw rod 3, is provided with back-up ring 9, and screw rod 3 afterbodys are provided with fuel return hole, and oil scavenger 10 is installed at fuel return hole place, and the through hole 32 that screw rod 3 centers arrange is connected with fuel return hole.Due to torsion bar 4 tool elasticity, when rotating when input shaft 5, screw rod 3 has relative rotation with input shaft 5, and input shaft oil groove 51 " is connected " oil inlet and oil return oil duct again with screw rod oil groove 31, makes the deflector can power-assisted, and the characteristic curve of its formation as shown in Figure 4.
Owing to having formed rotary valve between the large end of screw rod 3 and input shaft 5, its inner through hole 32 arranging, can be for oil return, and oil inlet and oil return hole is design separately, makes the tortuous oil duct minimizing of rotary valve, greatly reduces and leads to oily resistance.The annular boss 33 of screw rod 3 can supporting plane bearing 34, uses surface bearing 34, can be held larger screw axial power, and its load-carrying capacity is significantly promoted.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (9)
1. for the steering control valve of heavy ball-and-nut steering gear, it is characterized in that: comprise valve body (1), upper cover (2), screw rod (3), torsion bar (4) and input shaft (5), one end of described torsion bar (4) is connected with input shaft (5), torsion bar (4) is fixed in screw rod (3) by straight pin (6), on the outer wall periphery of described input shaft (5), be provided with input shaft oil groove (51), input shaft oil groove (51) axially arranges along input shaft (5), on the inwall periphery of described screw rod (3), be provided with the screw rod oil groove (31) matching with input shaft oil groove (51), described screw rod (3) forms rotary valve with input shaft (5), between screw rod (3) and input shaft (5), can relatively rotate, between input shaft oil groove (51) and screw rod oil groove (31), form rotary valve oil duct, described screw rod (3) center is provided with through hole (32), between through hole (32) and input shaft oil groove (51), is provided with oil duct (7).
2. the steering control valve for heavy ball-and-nut steering gear according to claim 1, is characterized in that: on described valve body (1), be provided with fuel feed hole (11), described fuel feed hole (11) is connected with rotary valve oil duct.
3. the steering control valve for heavy ball-and-nut steering gear according to claim 1, it is characterized in that: the large end of described screw rod (3) is provided with annular boss (33), between annular boss (33) and valve body (1), be provided with surface bearing (34), surface bearing (34) is fixing with the annular boss (33) on screw rod (3) by faced washer (35); Between described valve body (1) and upper cover (2), pass through thread connection.
4. the steering control valve for heavy ball-and-nut steering gear according to claim 1, it is characterized in that: one end of described input shaft (5) is input end, the other end is mouth, the input end of input shaft (5) is for connecting spline, and described input shaft oil groove (51) is arranged on the outer wall periphery of input shaft (5) mouth vertically.
5. the steering control valve for heavy ball-and-nut steering gear according to claim 1, is characterized in that: described input shaft oil groove (51) and quantity Wei Liu Dao Huo eight roads of screw rod oil groove (31), evenly lay.
6. the steering control valve for heavy ball-and-nut steering gear according to claim 1, is characterized in that: described screw rod (3) is outer is arranged with sleeve (8), between described sleeve (8) and screw rod (3), is provided with back-up ring (9).
7. the steering control valve for heavy ball-and-nut steering gear according to claim 1, it is characterized in that: described screw rod (3) afterbody is provided with fuel return hole, oil scavenger (10) is installed at fuel return hole place, and the through hole (32) that screw rod (3) center arranges is connected with fuel return hole.
8. the steering control valve for heavy ball-and-nut steering gear according to claim 1, is characterized in that: the seal ring (12) adopting in described valve body (1) adopts high-pressure anti-wear seal ring.
9. the steering control valve for heavy ball-and-nut steering gear according to claim 1, is characterized in that: on described upper cover (2), compound type anti-dust seal (13) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410094393.7A CN103879445A (en) | 2014-03-14 | 2014-03-14 | Steering control valve for heavy recirculating ball steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410094393.7A CN103879445A (en) | 2014-03-14 | 2014-03-14 | Steering control valve for heavy recirculating ball steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103879445A true CN103879445A (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410094393.7A Pending CN103879445A (en) | 2014-03-14 | 2014-03-14 | Steering control valve for heavy recirculating ball steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103879445A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105501293A (en) * | 2016-01-26 | 2016-04-20 | 荆州恒隆汽车技术(检测)中心 | Electric hydraulic steering device for commercial vehicle |
| CN108349528A (en) * | 2015-11-12 | 2018-07-31 | 日本精工株式会社 | Electric type power steering device and its manufacturing method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19614867A1 (en) * | 1996-04-16 | 1997-10-23 | Zahnradfabrik Friedrichshafen | Power steering, in particular for motor vehicles |
| JPH10181624A (en) * | 1996-12-25 | 1998-07-07 | Kayaba Ind Co Ltd | Power steering |
| CN201058620Y (en) * | 2006-10-20 | 2008-05-14 | 江门市兴江转向器有限公司 | Complete-characteristic steering control valve |
| CN202152067U (en) * | 2011-07-21 | 2012-02-29 | 南京东华汽车转向器有限公司 | Rotary valve of cycle ball hydraulic power steering gear |
| CN202208312U (en) * | 2011-08-25 | 2012-05-02 | 沙市久隆汽车动力转向器有限公司 | Power steering gear screw rod assembly with bypass oil hole |
| CN202827717U (en) * | 2012-09-23 | 2013-03-27 | 沙市久隆汽车动力转向器有限公司 | Power steering gear assembly capable of achieving oil return of tail end |
| CN203819328U (en) * | 2014-03-14 | 2014-09-10 | 杭州世宝汽车方向机有限公司 | Steering control valve used for heavy circulating ball steering gear |
-
2014
- 2014-03-14 CN CN201410094393.7A patent/CN103879445A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19614867A1 (en) * | 1996-04-16 | 1997-10-23 | Zahnradfabrik Friedrichshafen | Power steering, in particular for motor vehicles |
| JPH10181624A (en) * | 1996-12-25 | 1998-07-07 | Kayaba Ind Co Ltd | Power steering |
| CN201058620Y (en) * | 2006-10-20 | 2008-05-14 | 江门市兴江转向器有限公司 | Complete-characteristic steering control valve |
| CN202152067U (en) * | 2011-07-21 | 2012-02-29 | 南京东华汽车转向器有限公司 | Rotary valve of cycle ball hydraulic power steering gear |
| CN202208312U (en) * | 2011-08-25 | 2012-05-02 | 沙市久隆汽车动力转向器有限公司 | Power steering gear screw rod assembly with bypass oil hole |
| CN202827717U (en) * | 2012-09-23 | 2013-03-27 | 沙市久隆汽车动力转向器有限公司 | Power steering gear assembly capable of achieving oil return of tail end |
| CN203819328U (en) * | 2014-03-14 | 2014-09-10 | 杭州世宝汽车方向机有限公司 | Steering control valve used for heavy circulating ball steering gear |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108349528A (en) * | 2015-11-12 | 2018-07-31 | 日本精工株式会社 | Electric type power steering device and its manufacturing method |
| CN105501293A (en) * | 2016-01-26 | 2016-04-20 | 荆州恒隆汽车技术(检测)中心 | Electric hydraulic steering device for commercial vehicle |
| CN105501293B (en) * | 2016-01-26 | 2017-12-01 | 荆州恒隆汽车技术(检测)中心 | A kind of electrohydraulic steering device for commercial car |
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Application publication date: 20140625 |
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| RJ01 | Rejection of invention patent application after publication |