CN1789056A - Built-in type positioning and unloading device for auto power diverter - Google Patents
Built-in type positioning and unloading device for auto power diverter Download PDFInfo
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- CN1789056A CN1789056A CN 200510022657 CN200510022657A CN1789056A CN 1789056 A CN1789056 A CN 1789056A CN 200510022657 CN200510022657 CN 200510022657 CN 200510022657 A CN200510022657 A CN 200510022657A CN 1789056 A CN1789056 A CN 1789056A
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- rack piston
- unloader valve
- oil
- valve
- locating bush
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Abstract
The built-in locating and relieving device for automobile power steering gear consists of valve seat, left relief valve, oil path, casing, locating rod, left locating sleeve, rack piston, radial oil channel, right relief valve, right locating sleeve, technological plug, thread column, middle oil plug, screw assembly and inner oil channel. When the rack piston is shifted downwards to the left or the right limit position under the push of the screw assembly, the corresponding valve core is pushed with the locating rod or the right locating sleeve to conduct the relief valve to relieve. The present invention has simple structure, and timely and complete reliable relief, and is especially suitable for use in heavy and middle duty car.
Description
Technical field
The present invention relates to a kind of relief arrangement, particularly a kind of automobile power steering relief arrangement.
Background technology
The screw rod of automobile driver by steering disc spins automobile power steering moves the rack piston straight line that matches and drives motor turning.Prior art is provided with oil hydraulic system boosting rack piston and moves in order to alleviate the labour intensity of chaufeur in automobile power steering.But resistance obviously increases when rack piston moves to end position, causes oil hydraulic system pressure to raise, and fragile oil hydraulic system and other associated components carry out necessary off-load although all be provided with a kind of relief arrangement on the automobile power steering of prior art.This relief arrangement is connected with the off-load push rod by oil in the middle of installing on the rack piston is stifled, and the steel ball composition is withstood with spring in two ends, and owing to this off-load complex structure, big, the poor sealing performance of installation difficulty, the off-load effect is undesirable.
Summary of the invention
The present invention is directed to the deficiencies in the prior art part, propose a kind of simple in structure, easy for installation, good seal performance, off-load failure-free built-in type positioning and unloading device for auto power diverter.
The present invention is achieved by following technical proposals.
A kind of built-in type positioning and unloading device for auto power diverter, it is stifled by valve seat, left unloader valve, oil transportation road, housing, radius stay, left locating bush, rack piston, radial direction oil, right unloader valve, right locating bush, technology plug, threaded column, middle oil, screw arbor assembly, internal oil channel are formed.Described screw arbor assembly cooperates with the rack piston spiral, rack piston and housing inner chamber free-running fit.Described valve seat right side one side shaft is to installing left unloader valve, and internal oil channel and left unloader valve left end link.On the left unloader valve opposite position that install described rack piston left side one side and valve seat right side, be provided with the axial blind hole that left locating bush is installed, radius stay and left locating bush interference fit, the left side of radius stay is for setting the off-load reference position.Rack piston right side one side also is provided with axial blind hole right unloader valve is installed, and blind-hole bottom is provided with the radial direction oil that runs through outer wall, and blind hole and radial direction oil link.Oil was stifled in the middle of rack piston endoporus right-hand member was tightly connected.On the right unloader valve opposite position that described housing right side and rack piston right-hand member are installed, be provided with tapped through hole threaded column is installed, right locating bush and threaded column left end interference fit, right locating bush left side is for setting the off-load reference position.
Left unloader valve is static relatively in the said structure, and radius stay is moved to the left with rack piston, and the radius stay left side is the desired location of rack piston conducting left side unloader valve when moving on to the left end end position, by the spool off-load of radius stay pushing tow left side unloader valve.Right unloader valve moves right with rack piston, right locating bush cooperates with relative static threaded column, right locating bush left side is the desired location of rack piston right unloader valve of conducting when moving on to extreme right position, by the spool off-load of the right unloader valve of right locating bush left side pushing tow.
The present invention compared with prior art has following good effect:
1, the location off-load is simple in structure, easy to manufacture;
2, unloader valve is a kind of straight tube elasticity double spool structure, and the self sealss performance is good;
3, left and right chamber respectively is provided with a unloader valve of axially installing, and presses desired location pushing tow unloader valve spool by detent mechanism, and off-load in time, reliably, thoroughly.
Description of drawings
Fig. 1 is the structural representation of built-in type positioning and unloading device for auto power diverter of the present invention.
The specific embodiment
Built-in type positioning and unloading device for auto power diverter, it is stifled 13 by valve seat 1, left unloader valve 2, oil transportation road 3, housing 4, radius stay 5, left locating bush 6, rack piston 7, radial direction oil 8, right unloader valve 9, right locating bush 10, technology plug 11, threaded column 12, middle oil, screw arbor assembly 14 and internal oil channel 15 are formed jointly.Described screw arbor assembly 14 cooperates with rack piston 7 spirals, rack piston can be in housing 4 sway.Described valve seat 1 right side one side shaft is to the left unloader valve 2 that is threaded, and internal oil channel 15 links with left unloader valve 2 left ends.On left unloader valve 2 opposite positions that install described rack piston 7 left sides, one side and valve seat 1 right side, be provided with the axial blind hole that left locating bush 6 is installed, radius stay 5 and left locating bush 6 interference fit are set position, radius stay 5 left side by unloaded position.Described rack piston 7 right sides one side also is provided with axial blind hole, and right unloader valve 9 is installed in the blind hole, is threaded between the two.Be provided with the radial direction oil 8 that runs through outer wall in the bottom of this place's blind hole, blind hole and radial direction oil 8 link.Oil stifled 13 in the middle of rack piston 7 endoporus right-hand members were tightly connected.On right unloader valve 9 opposite positions that described housing 4 right sides and rack piston 7 right-hand members are installed, be provided with tapped through hole threaded column 12 is installed, right locating bush 10 and threaded column 12 left end interference fit, and set the position, left side of right locating bush 10 by unloaded position.
Driving rack piston 7 by rotary screw assembly 14 in the said structure moves right, this moment, oil hydraulic system supplied pressure oil by the internal oil channel 15 in the valve seat 1 to rack piston 7 left chambeies, boosting rack piston 7 moves right, pressure oil simultaneously also the interior Luo Dao gap by screw arbor assembly 14 and rack piston 7 enter radial direction oil 8 and the interior blind hole that links in, the left spool of the right unloader valve 9 of pressure oil pushing tow, when rack piston 7 moves right to end position, by the right unloader valve 9 of the right spool conducting of right locating bush 10 left side pushing tows of setting unloaded position, make the pressure oil pressure in left chamber enter right chamber, realize a left side through right unloader valve 9, right cavity pressure balance and off-load.Otherwise, rotary screw assembly 14 drives rack piston 7 and is moved to the left, this moment, oil hydraulic system supplied pressure oil by internal oil channel 15 in the valve seat 1 and the oil transportation road 3 in the housing 4 to rack piston 7 right chambeies, boosting rack piston 7 is moved to the left, pressure oil passes through the left spool of internal oil channel 15 pushing tows left side unloader valve 2 simultaneously, when rack piston 7 moves to end position left, by the right spool conducting of the radius stay 5 left side pushing tows left side unloader valve 2 of setting unloaded position, make the pressure oil in right chamber enter left chamber, realize left and right cavity pressure balance and off-load through left unloader valve 2.Built-in type positioning and unloading device for auto power diverter of the present invention is set the spool of detent mechanism pushing tow unloader valve according to the moving limit position of rack piston 7, realizes linking up left and right chamber, makes left and right cavity pressure balance and off-load.This structure off-load is timely, reliable, thorough, no external leakage.
Claims (3)
1, a kind of built-in type positioning and unloading device for auto power diverter, it is made up of valve seat (1), left unloader valve (2), oil transportation road (3), housing (4), radius stay (5), left locating bush (6), rack piston (7), radial direction oil (8), right unloader valve (9), right locating bush (10), technology plug (11), threaded column (12), middle oil stifled (13), screw arbor assembly (14), internal oil channel (15); Described screw arbor assembly (14) cooperates with rack piston (7) spiral, rack piston (7) and housing (4) inner chamber free-running fit; It is characterized in that: described valve seat (1) right side one side shaft is to installing left unloader valve (2), and internal oil channel (15) links with left unloader valve (2) left end; On left unloader valve (2) opposite position that install described rack piston (7) left side one side and valve seat (1) right side, be provided with the axial blind hole that left locating bush (6) is installed, radius stay (5) and left locating bush (6) interference fit, the left side of radius stay (5) is for setting the off-load reference position; Rack piston (7) right side one side also is provided with axial blind hole right unloader valve (9) is installed, and blind-hole bottom is provided with the radial direction oil (8) that runs through outer wall, and blind hole and radial direction oil (8) link; Oil stifled (13) in the middle of rack piston (7) endoporus right-hand member is tightly connected; On right unloader valve (9) opposite position that described housing (4) right side and rack piston (7) right-hand member are installed, be provided with tapped through hole threaded column (12) is installed, right locating bush (10) and threaded column (12) left end interference fit, right locating bush (10) left side is for setting the off-load reference position.
2, according to the described a kind of built-in type positioning and unloading device for auto power diverter of claim 1, it is characterized in that: described left unloader valve (2) and right unloader valve (9) are with a kind of straight tube elasticity double spool hermetically-sealed construction.
3, according to the described a kind of built-in type positioning and unloading device for auto power diverter of claim 1, it is characterized in that: being connected to be of described left unloader valve (2) and valve seat (1), right unloader valve (9) and rack piston (7) is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100226579A CN100343106C (en) | 2005-12-27 | 2005-12-27 | Built-in type positioning and unloading device for auto power diverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100226579A CN100343106C (en) | 2005-12-27 | 2005-12-27 | Built-in type positioning and unloading device for auto power diverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1789056A true CN1789056A (en) | 2006-06-21 |
| CN100343106C CN100343106C (en) | 2007-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100226579A Expired - Fee Related CN100343106C (en) | 2005-12-27 | 2005-12-27 | Built-in type positioning and unloading device for auto power diverter |
Country Status (1)
| Country | Link |
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| CN (1) | CN100343106C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083676A (en) * | 2008-05-15 | 2011-06-01 | Trw汽车美国有限责任公司 | Gearbox assembly for an electric power steering system |
| CN102765419A (en) * | 2011-05-06 | 2012-11-07 | 豫北转向系统股份有限公司 | Stroke unloading structure for circulating ball-type automobile power steering gear |
| CN102815334A (en) * | 2011-06-08 | 2012-12-12 | 豫北转向系统股份有限公司 | Travel unloading mechanism of recirculating ball-type power steering gear of automobile |
| CN113212548B (en) * | 2021-06-11 | 2022-08-02 | 三一专用汽车有限责任公司 | Unloading method of steering power-assisted system, steering power-assisted system and engineering machinery |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4648307A (en) * | 1985-10-10 | 1987-03-10 | Trw, Inc. | Unloading valve for power steering piston with integral gear |
| US5419235A (en) * | 1994-02-28 | 1995-05-30 | Trw Inc. | Power steering gear assembly |
| CN2366333Y (en) * | 1999-03-24 | 2000-03-01 | 荆州恒隆汽车零部件制造有限公司 | Rotation type limiting unloading valve for automobile power-driven steering device |
| CN2855863Y (en) * | 2005-12-27 | 2007-01-10 | 江苏罡阳股份有限公司 | Positioning unloading device built in automobile dynamic steering device |
-
2005
- 2005-12-27 CN CNB2005100226579A patent/CN100343106C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083676A (en) * | 2008-05-15 | 2011-06-01 | Trw汽车美国有限责任公司 | Gearbox assembly for an electric power steering system |
| CN102083676B (en) * | 2008-05-15 | 2013-05-22 | Trw汽车美国有限责任公司 | Gearbox assembly for an electric power steering system |
| CN102765419A (en) * | 2011-05-06 | 2012-11-07 | 豫北转向系统股份有限公司 | Stroke unloading structure for circulating ball-type automobile power steering gear |
| CN102815334A (en) * | 2011-06-08 | 2012-12-12 | 豫北转向系统股份有限公司 | Travel unloading mechanism of recirculating ball-type power steering gear of automobile |
| CN102815334B (en) * | 2011-06-08 | 2015-01-21 | 豫北转向系统股份有限公司 | Travel unloading mechanism of recirculating ball-type power steering gear of automobile |
| CN113212548B (en) * | 2021-06-11 | 2022-08-02 | 三一专用汽车有限责任公司 | Unloading method of steering power-assisted system, steering power-assisted system and engineering machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100343106C (en) | 2007-10-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Gangyang Power Steering Factory Assignor: Jiangsu Gangyang Stock Co., Ltd. Contract fulfillment period: 2009.7.20 to 2025.12.26 contract change Contract record no.: 2009320001430 Denomination of invention: Built-in type positioning and unloading device for auto power diverter Granted publication date: 20071017 License type: Exclusive license Record date: 2009.8.7 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.7.20 TO 2025.12.26; CHANGE OF CONTRACT Name of requester: JIANGSU GANGYANG POWE REDIRECTOR FACTORY Effective date: 20090807 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20100127 |