CN202879580U - Circulating ball hydraulic power assisted steering gear with floatable piston - Google Patents
Circulating ball hydraulic power assisted steering gear with floatable piston Download PDFInfo
- Publication number
- CN202879580U CN202879580U CN 201220560587 CN201220560587U CN202879580U CN 202879580 U CN202879580 U CN 202879580U CN 201220560587 CN201220560587 CN 201220560587 CN 201220560587 U CN201220560587 U CN 201220560587U CN 202879580 U CN202879580 U CN 202879580U
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- piston
- nut
- hydraulic power
- assisted steering
- power assisted
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Abstract
The utility model discloses a circulating ball hydraulic power assisted steering gear with a floatable piston. The circulating ball hydraulic power assisted steering gear with the floatable piston comprises a valve assembly, a rack piston, a shell body and an output shaft, wherein the valve assembly is provided with a threaded rod, and the threaded rod is sleeved with the rack piston. The circulating ball hydraulic power assisted steering gear with the floatable piston is characterized in that a sealing sliding sleeve is arranged between one end, close to the valve assembly, of the rack piston and the threaded rod, a nut is arranged between the other end of the rack piston and the threaded rod, the nut is matched with the rack piston in a clearance fitting mode, the nut penetrates through a steel ball, a conduit of the steel ball and a clip of the conduit and is fixed on the threaded rod, and the nut rotates relative to the threaded rod. A spiral raceway and the rack piston of the circulating ball hydraulic power assisted steering gear are machined separately, the technique is simple, when the oil pressure increases, the spiral raceway is not easy to deform, and the flowing capacity of the steel ball cannot become bad.
Description
Technical field
The utility model relates to vehicle steering device, relates more specifically to a kind of circulation ball hydraulic power assisted steering.
Background technology
Hydraulic power steering gear is installed in automotive front near chaufeur one side.It can provide power-assisted and assist chaufeur to finish the function that turns in Vehicular turn.The power resources of hydraulic power steering gear are driving engines, drive operation of oil pump in the time of engine operation.When acting on the end face (load bearing face) of piston when high pressure oil, piston is produced thrust.Along with the rising thrust of oil pressure increases, thrust increase to make wheel flutter overcome road resistance in, promote wheel flutter and rotate, vehicle enters steering state.
The circulation ball hydraulic power assisted steering mechanics is comprised of bolt and nut transmission and rack tooth fan transmission.In existing circulation ball hydraulic power assisted steering, nut (spiral rolling track) all is to process on piston, and its advantage is simple in structure, and is easy to assembly.
But this structure also exists following shortcoming simultaneously: 1: the spiral rolling track manufacturing process is complicated; 2: screw spiral raceway and rack piston spiral rolling track right alignment were poor when the accumulation of Mismachining tolerance may cause assembling, and had reduced the fluid ability of steel ball, so that chaufeur is felt heavy hair fastener when beating direction; 3: along with the rising of oil pressure, interaction force on rack piston upper rack and the rocker shaft between the tooth fan increases, rack piston generation tilting and even distortion are so that the fluid ability variation of steel ball, feel heavy hair fastener when causing chaufeur to beat direction, deflector is stuck when serious, causes serious accident.Especially the 3rd development that has seriously restricted large cylinder diameter circulating ball hydraulic booster steering wheel.
Summary of the invention
In order to overcome existing defective in the above-mentioned background technology, the utility model discloses a kind of spiral rolling track and rack piston and process separately, technique is simple, and oil pressure is when rising, spiral rolling track is not yielding, the circulation ball hydraulic power assisted steering that the fluid ability of steel ball can variation.
The utility model is achieved in that the relocatable circulation ball hydraulic power assisted steering of a kind of rack piston, comprise valve assembly, rack piston, housing and output shaft, be provided with a screw rod on the valve assembly, piston bush is located on the screw rod, be provided with a sealing sliding sleeve between one end of the close valve assembly of rack piston and the screw rod, be provided with a nut between the other end of rack piston and the screw rod; Described nut cooperates with the rack piston gap, and described nut is by steel ball, and steel ball conduit and conduit clamp are fixed on the screw rod, the relative bolt rotary of nut.
The relocatable circulation ball hydraulic power assisted steering of a kind of piston of the present utility model, screw rod and the sealing sliding sleeve between, the sealing sliding sleeve be provided with seal ring seal with the piston among.
The relocatable circulation ball hydraulic power assisted steering of a kind of piston of the present utility model, piston and nut are fixed by C shape jump ring and disk spring.
The relocatable circulation ball hydraulic power assisted steering of a kind of piston of the present utility model also is provided with stop screw and fixes between piston and the nut.
The utility model has following advantage than the existing structure product: because the nut shape simple rule, therefore frock is simple during the nut processing spiral rolling track, precision is high.Adopt free-running fit between nut cylindrical and the rack piston hole, both rack piston was relocatable with respect to the bolt and nut transmission, when the stressed generation tilting of rack piston and even distortion, the bolt and nut transmission is unaffected, like this then can eliminate foregoing bring because part's machining errors and rack piston are stressed turn to the hair fastener phenomenon, also eliminated the restriction of rack piston stress deformation for large cylinder diameter deflector development simultaneously helping chaufeur to obtain good driving sensation.Therefore the utility model has very great meaning for the development of circulation ball hydraulic power assisted steering.
Description of drawings
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is screw rod and sealing sliding sleeve partial schematic diagram.
Accompanying drawing 3 is the nut schematic diagrams that are processed with the stop screw hole.
Accompanying drawing 4 is the rack piston partial schematic diagrams that are processed with spacing tapped bore and jump-ring slot.
Among the figure: 1 is valve assembly, and 2 is rack piston, and 3 is disk spring, 4 is nut, and 5 is the steel ball conduit, and 6 is steel ball, 7 is the conduit clamp, and 8 is disk spring, and 9 is C shape jump ring, 10 stop screws, 11 is screw rod, 12 is C shape jump ring, 13 is seal ring, and 14 are the sealing sliding sleeve, and 15 is seal ring, 16,17 is spacing screw hole, and 18 is housing, and 19 is output shaft.
The specific embodiment
Describe the utility model in detail below in conjunction with accompanying drawing:
As shown in the figure, the relocatable circulation ball hydraulic power assisted steering of a kind of piston of the present utility model mainly comprises valve assembly 1, rack piston 2, housing 18 and output shaft 19.Be provided with a screw rod 11 on the valve assembly 1, rack piston 2 is set on the screw rod 11.Be provided with a sealing sliding sleeve 14 between one end of the close valve assembly 1 of rack piston 2 and the screw rod 11, be provided with a nut 4 between the other end of rack piston 2 and the screw rod 11.As shown in Figure 2, be provided with together seal ring 15 sealings between screw rod 11 and the sealing sliding sleeve 14, be provided with together seal ring 13 sealings between sealing sliding sleeve 14 and the rack piston 2.The end of sealing sliding sleeve 14 also is provided with a C shape jump ring 12.As shown in Figure 1, described nut 4 and rack piston 2 separate machined, free-running fit, and described nut between the two 4 is by steel ball 6, and steel ball conduit 5 and conduit clamp 7 are fixed on the screw rod 11, and nut 4 rotates flexibly relative to screw rod 11, and gapless is without the hair fastener phenomenon.As shown in Figure 3, be processed with stop screw hole 16 on the nut 4, as shown in Figure 4, be processed with stop screw hole 17 on the rack piston 2.As shown in Figure 1, also fixing by stop screw 10 between nut 4 and the rack piston 2.Further, as shown in Figure 1, also fixing by C shape jump ring 9, disk spring 8 and disk spring 3 between rack piston 2 and the nut 4.
Fitting process is as follows:
The stationary rack piston, with valve assembly that sealing sliding sleeve, seal ring are housed from rack piston is packed on the right side into, a slice of in the rack piston left hole, packing into disk spring.
Nut is passed through steel ball, the steel ball conduit, the conduit clamp is fixed on the screw rod, rotating nut, nut should be flexible with respect to bolt rotary, and gapless is without the hair fastener phenomenon.
Pack into successively in nut left side again a slice disk spring and C shape jump ring, be pressed into together C shape jump ring, disk spring and nut in the rack piston after being in the stop screw hole on the nut and the spacing tapped bore on the piston on the same straight line and tighten the stop screw that scribbles in advance sealant, this moment the rotating valve assembly, valve assembly should rotate flexibly with respect to rack piston, gapless is without the hair fastener phenomenon.
At last the rack piston that installs and valve assembly are packed in the housing, pack into output shaft and tight upper bolt.
Rack piston of the present utility model floats with respect to the bolt and nut transmission, therefore can eliminate bring because Mismachining tolerance and rack piston are stressed turn to the hair fastener phenomenon, also eliminate simultaneously the restriction of rack piston stress deformation for large cylinder diameter deflector development helping chaufeur to obtain good driving sensation, had very great meaning for the development of circulation ball hydraulic power assisted steering.
Claims (4)
1. relocatable circulation ball hydraulic power assisted steering of piston, comprise valve assembly, rack piston, housing and output shaft, be provided with a screw rod on the valve assembly, rack piston is set on the screw rod, it is characterized in that: be provided with a sealing sliding sleeve between an end of the close valve assembly of rack piston and the screw rod, be provided with a nut between the other end of rack piston and the screw rod; Described nut cooperates with the rack piston gap, and described nut is by steel ball, and steel ball conduit and conduit clamp are fixed on the screw rod, the relative bolt rotary of nut.
2. the relocatable circulation ball hydraulic power assisted steering of a kind of piston as claimed in claim 1 is characterized in that: between screw rod and the sealing sliding sleeve, the sealing sliding sleeve is provided with seal ring seal with the piston among.
3. the relocatable circulation ball hydraulic power assisted steering of a kind of piston as claimed in claim 1, it is characterized in that: piston and nut are fixed by C shape jump ring and disk spring.
4. the relocatable circulation ball hydraulic power assisted steering of a kind of piston as claimed in claim 3 is characterized in that: also be provided with stop screw between piston and the nut and fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220560587 CN202879580U (en) | 2012-10-30 | 2012-10-30 | Circulating ball hydraulic power assisted steering gear with floatable piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220560587 CN202879580U (en) | 2012-10-30 | 2012-10-30 | Circulating ball hydraulic power assisted steering gear with floatable piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202879580U true CN202879580U (en) | 2013-04-17 |
Family
ID=48071036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220560587 Expired - Lifetime CN202879580U (en) | 2012-10-30 | 2012-10-30 | Circulating ball hydraulic power assisted steering gear with floatable piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202879580U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951197A (en) * | 2012-10-30 | 2013-03-06 | 杭州世宝汽车方向机有限公司 | Hydraulic power assisted diverter of circulating ball with floatable piston |
| CN105235740A (en) * | 2015-10-29 | 2016-01-13 | 常州机电职业技术学院 | Hydraulic Power Steering System |
| CN109080695A (en) * | 2018-09-12 | 2018-12-25 | 杭州世宝汽车方向机有限公司 | Ball-and-nut steering gear shell and its manufacturing method |
-
2012
- 2012-10-30 CN CN 201220560587 patent/CN202879580U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951197A (en) * | 2012-10-30 | 2013-03-06 | 杭州世宝汽车方向机有限公司 | Hydraulic power assisted diverter of circulating ball with floatable piston |
| CN105235740A (en) * | 2015-10-29 | 2016-01-13 | 常州机电职业技术学院 | Hydraulic Power Steering System |
| CN109080695A (en) * | 2018-09-12 | 2018-12-25 | 杭州世宝汽车方向机有限公司 | Ball-and-nut steering gear shell and its manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: SIPING CITY STEERING GEAR CO.,LTD. Assignor: HANGZHOU SHIBAO AUTO STEERING GEAR Co.,Ltd. Contract record no.: 2014220000023 Denomination of utility model: Hydraulic power assisted diverter of circulating ball with floatable piston Granted publication date: 20130417 License type: Exclusive License Record date: 20140402 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |