CN102815334A - Travel unloading mechanism of recirculating ball-type power steering gear of automobile - Google Patents
Travel unloading mechanism of recirculating ball-type power steering gear of automobile Download PDFInfo
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- CN102815334A CN102815334A CN201110150927XA CN201110150927A CN102815334A CN 102815334 A CN102815334 A CN 102815334A CN 201110150927X A CN201110150927X A CN 201110150927XA CN 201110150927 A CN201110150927 A CN 201110150927A CN 102815334 A CN102815334 A CN 102815334A
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Abstract
The invention belongs to the technology of power steering gears of automobiles, relates to improvement of a recirculating ball-type power steering gear, and discloses a travel unloading mechanism of a recirculating ball-type power steering gear of an automobile. The travel unloading mechanism comprises a steering gear lower shell (1), a steering nut (2) and a combined sealing component (3), and the combined sealing component (3) is positioned in a sealing groove on a cylindrical surface of the right end of the steering nut (2). The travel unloading mechanism is characterized in that a left steel ball hole (15) of a left unloading hole (10) and a screw ring (13) are arranged at an outer port of the left unloading hole (10), a steel ball (12) is arranged in an unthreaded hole of the left steel ball hole (15), and a conical surface (14) is arranged on an inner port of a center hole of the screw ring (13); and a right steel ball hole (17) of a right unloading hole (8) is arranged on an outer port of the right unloading hole (8), another steel ball (12) is disposed in the right steel ball hole (17), and a conical surface (18) is arranged on an outer port of the right unloading hole (8). By the aid of the travel unloading mechanism, the problem of boosting failure of a travel unloading structure of a recirculating ball-type power steering gear of an automobile under specific conditions can be avoided, and reliability is improved.
Description
Technical field
The invention belongs to the automobile power steering technology, relate to improvement the circulating ball type automobile power steering.
Background technology
Chinese invention patent application " circulating ball type automobile power steering stroke off-load structure " (application number: 201110117749.0) disclose a kind of stroke off-load structure of circulating ball type automobile power steering; This application has been simplified the structure of original stroke unloading mechanism; Make things convenient for processing, reduced cost.Its shortcoming is: the problem that exists power-assisted to lose efficacy under specific circumstances, for example, when automotive wheel is stuck or is absorbed in and is difficult in the pit rotate in unloaded position; Because left chamber and right chamber are communicated with; During the contrarotation bearing circle, the deflector internal pressure can't be set up, and can not produce power-assisted; Can only use manual moment that wheel is just returned, cause the contrarotation bearing circle to require great effort very much.
Summary of the invention
The objective of the invention is: propose a kind of circulating ball type automobile power steering stroke off-load structure that can avoid power-assisted to lose efficacy.
Technical scheme of the present invention is: circulating ball type automobile power steering stroke unloading mechanism; Comprise deflector lower house 1, steering nut 2 and be positioned at the combination sealing assembly 3 of steering nut 2 right-hand member face of cylinder back seal grooves; Steering nut 2 left end bottoms have with rocker shaft 11 on tooth fan ingear tooth bar; The right-hand member of steering nut 2 inserts in the cylindrical right chamber 4 of lower house 1 and keeps free-running fit; Combination sealing assembly 3 is with the clearance seal between the steering nut 2 right-hand member faces of cylinder and right chamber 4 inwalls; Steering nut 2 left sides constitute left chamber 5 with following lower housing cavity, and right chamber 4 and left chamber 5 are communicated with the upper inside wall applying of the first half face of cylinder of steering nut 2 and lower house 1 inner chamber through lower house 1 in-to-in oil circuit with rotary valve mechanism corresponding ports respectively; In the upper inside wall of lower house 1 inner chamber an arc groove 6 that along the circumferential direction stretches is arranged, this arc groove 6 is L along steering nut 2 axial width, and the vertical split of these arc groove 6 broad wayss is D with distance between the vertical split of rocker shaft 11; Blind hole 7 perpendicular to the right side is arranged at the top in the right side of steering nut 2; A left unloading hole 10 and right unloading hole 8 are arranged on the top on steering nut 2 faces of cylinder; The inner port of left side unloading hole 10 is communicated with the left end of blind hole 7, and the inner port of right unloading hole 8 is communicated with the right part of blind hole 7; On the face of cylinder of steering nut 2, between left unloading hole 10 and the right unloading hole 8 annular groove 9 is arranged; It is characterized in that:
(1) external port at left unloading hole 10 has the left steel ball hole 15 of a diameter greater than left unloading hole 10; The external port of left side steel ball hole 15 is positioned on the face of cylinder of steering nut 2; Left side steel ball hole 15 forms a stepped hole with left unloading hole 10; Left steel ball hole 15 near external port be partly with negative thread 16, have a volution 13 to be screwed in the negative thread 16, at the unthreaded hole of left steel ball hole 15 steel ball 12 is arranged partly; The diameter of steel ball 12 is greater than the aperture of left unloading hole 10 and volution 13 centre holes; Distance from volution 13 inner end surfaces to the step end face left unloading hole 10 and the left steel ball hole 15 is greater than the diameter of steel ball 12, and the inner port of volution 13 centre holes has circular conical surface 14, the dredging flow groove that on the step end face between left unloading hole 10 and the left steel ball hole 15, has at least one to be communicated with left unloading hole 10; Left side steel ball hole 15 is to the distance of the annular groove 9 left hand edges width L less than arc groove 6 on the nut 3; When steering nut 2 is positioned at right unloaded position; Arc groove 6 is communicated with left steel ball hole 15 with annular groove 9, left chamber 5 is communicated with right chamber 4 through annular groove 9, arc groove 6, left steel ball hole 15, left unloading hole 10, dredging flow groove and blind hole 7;
(2) external port at right unloading hole 8 has the right steel ball hole 17 of a diameter greater than right unloading hole 8; The external port of right steel ball hole 17 is positioned on the face of cylinder of steering nut 2; Right steel ball hole 17 forms a stepped hole with right unloading hole 8, and a steel ball 12 is arranged in right steel ball hole 17, and the diameter of steel ball 12 is greater than the aperture of right unloading hole 8; The degree of depth of right steel ball hole 17 is greater than the diameter of steel ball 12; The external port of right unloading hole 8 has circular conical surface 18, and right steel ball hole 17 equates with the distance of left steel ball hole 15 to annular groove 9 left hand edges to the distance of annular groove 9 right hand edges, when steering nut 2 is positioned at left unloaded position; Arc groove 6 is communicated with right steel ball hole 17 with annular groove 9, right chamber 4 is communicated with left chamber 5 through blind hole 7, right unloading hole 8, right steel ball hole 17, arc groove 6 and annular groove 9.
Advantage of the present invention is: can avoid circulating ball type automobile power steering stroke off-load structure to occur the problem that power-assisted lost efficacy under specific circumstances, improve reliability.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the enlarged drawing of local A among the present invention.
The specific embodiment
Explain further details in the face of the present invention down.Referring to Fig. 1,2; Circulating ball type automobile power steering stroke unloading mechanism; Comprise deflector lower house 1, steering nut 2 and be positioned at the combination sealing assembly 3 of steering nut 2 right-hand member face of cylinder back seal grooves; Steering nut 2 left end bottoms have with rocker shaft 11 on tooth fan ingear tooth bar; The right-hand member of steering nut 2 inserts in the cylindrical right chamber 4 of lower house 1 and keeps free-running fit, and combination sealing assembly 3 is with the clearance seal between the steering nut 2 right-hand member faces of cylinder and right chamber 4 inwalls, and steering nut 2 left sides constitute left chamber 5 with the lower housing cavity of bottom; Right chamber 4 and left chamber 5 are communicated with the upper inside wall applying of the first half face of cylinder of steering nut 2 and lower house 1 inner chamber through lower house 1 in-to-in oil circuit with rotary valve mechanism corresponding ports respectively; In the upper inside wall of lower house 1 inner chamber an arc groove 6 that along the circumferential direction stretches is arranged, this arc groove 6 is L along steering nut 2 axial width, and the vertical split of these arc groove 6 broad wayss is D with distance between the vertical split of rocker shaft 11; Blind hole 7 perpendicular to the right side is arranged at the top in the right side of steering nut 2; A left unloading hole 10 and right unloading hole 8 are arranged on the top on steering nut 2 faces of cylinder; The inner port of left side unloading hole 10 is communicated with the left end of blind hole 7, and the inner port of right unloading hole 8 is communicated with the right part of blind hole 7; On the face of cylinder of steering nut 2, between left unloading hole 10 and the right unloading hole 8 annular groove 9 is arranged; It is characterized in that:
(1) external port at left unloading hole 10 has the left steel ball hole 15 of a diameter greater than left unloading hole 10; The external port of left side steel ball hole 15 is positioned on the face of cylinder of steering nut 2; Left side steel ball hole 15 forms a stepped hole with left unloading hole 10; Left steel ball hole 15 near external port be partly with negative thread 16, have a volution 13 to be screwed in the negative thread 16, at the unthreaded hole of left steel ball hole 15 steel ball 12 is arranged partly; The diameter of steel ball 12 is greater than the aperture of left unloading hole 10 and volution 13 centre holes; Distance from volution 13 inner end surfaces to the step end face left unloading hole 10 and the left steel ball hole 15 is greater than the diameter of steel ball 12, and the inner port of volution 13 centre holes has circular conical surface 14, the dredging flow groove that on the step end face between left unloading hole 10 and the left steel ball hole 15, has at least one to be communicated with left unloading hole 10; Left side steel ball hole 15 is to the distance of the annular groove 9 left hand edges width L less than arc groove 6 on the nut 3; When steering nut 2 is positioned at right unloaded position; Arc groove 6 is communicated with left steel ball hole 15 with annular groove 9, left chamber 5 is communicated with right chamber 4 through annular groove 9, arc groove 6, left steel ball hole 15, left unloading hole 10, dredging flow groove and blind hole 7;
(2) external port at right unloading hole 8 has the right steel ball hole 17 of a diameter greater than right unloading hole 8; The external port of right steel ball hole 17 is positioned on the face of cylinder of steering nut 2; Right steel ball hole 17 forms a stepped hole with right unloading hole 8, and a steel ball 12 is arranged in right steel ball hole 17, and the diameter of steel ball 12 is greater than the aperture of right unloading hole 8; The degree of depth of right steel ball hole 17 is greater than the diameter of steel ball 12; The external port of right unloading hole 8 has circular conical surface 18, and right steel ball hole 17 equates with the distance of left steel ball hole 15 to annular groove 9 left hand edges to the distance of annular groove 9 right hand edges, when steering nut 2 is positioned at left unloaded position; Arc groove 6 is communicated with right steel ball hole 17 with annular groove 9, right chamber 4 is communicated with left chamber 5 through blind hole 7, right unloading hole 8, right steel ball hole 17, arc groove 6 and annular groove 9.
Principle of work of the present invention is: when wheel is stuck or is absorbed in the pit in left unloaded position, during the bearing circle contrarotation, switch with right chamber 4 high pressure oils in left chamber 5; Chamber, a left side 5 gets into high pressure oil, and steel ball 12 forms conical surface seal with circular conical surface 18 in the right steel ball hole 17, and left chamber 5 is not communicated with right chamber 4; Chamber, a left side forms high-voltage oil cavity; Produce power-assisted, alleviate the manual moment of steering wheel rotation, be convenient to wheel and just return;
When wheel is stuck or is absorbed in the pit in right unloaded position, during the bearing circle contrarotation, switch with right chamber 4 high pressure oils in left chamber 5; Right chamber 4 gets into high pressure oil, and steel ball 12 is impacted the circular conical surface 14 formation conical surface seals to volution 13 inner port by fluid in the left steel ball hole 15, and left chamber 5 is not communicated with right chamber 4; Right chamber forms high-voltage oil cavity; Produce power-assisted, alleviate the manual moment of steering wheel rotation, be convenient to wheel and just return.
Claims (1)
1. circulating ball type automobile power steering stroke unloading mechanism; Comprise deflector lower house [1], steering nut [2] and be positioned at the combination sealing assembly [3] of steering nut [2] right-hand member face of cylinder back seal groove; Steering nut [2] left end bottom have with rocker shaft [11] on tooth fan ingear tooth bar; The right-hand member of steering nut [2] inserts in the cylindrical right chamber [4] of lower house [1] and keeps free-running fit; Combination sealing assembly [3] is with the clearance seal between steering nut [2] the right-hand member face of cylinder and right chamber [4] inwall; Steering nut [2] left side constitutes left chamber [5] with following lower housing cavity, and right chamber [4] and left chamber [5] are communicated with the upper inside wall applying of the first half face of cylinder of steering nut [2] and lower house [1] inner chamber through lower house [1] in-to-in oil circuit with rotary valve mechanism corresponding ports respectively; Upper inside wall at lower house [1] inner chamber has an arc groove [6] that along the circumferential direction stretches; This arc groove [6] is L along the axial width of steering nut [2], and the vertical split of this arc groove [6] broad ways is D with distance between the vertical split of rocker shaft [11]; Blind hole perpendicular to the right side [7] is arranged at the top in the right side of steering nut [2]; On the top on steering nut [2] face of cylinder a left unloading hole [10] and right unloading hole [8] are arranged; The inner port of left side unloading hole [10] is communicated with the left end of blind hole [7], and the inner port of right unloading hole [8] is communicated with the right part of blind hole [7]; On the face of cylinder of steering nut [2], between left unloading hole [10] and the right unloading hole [8] annular groove [9] is arranged; It is characterized in that:
(1) external port at left unloading hole [10] has the left steel ball hole [15] of a diameter greater than left unloading hole [10]; The external port of left side steel ball hole [15] is positioned on the face of cylinder of steering nut [2]; Left side steel ball hole [15] and left unloading hole [10] form a stepped hole; Be partly with negative thread [16] at left steel ball hole [15] near external port; There is a volution [13] to be screwed in the negative thread [16]; Unthreaded hole at left steel ball hole [15] partly has a steel ball [12], and the diameter of steel ball [12] is greater than the aperture of left unloading hole [10] and volution [13] centre hole, from volution [13] inner end surface to left unloading hole [10] and the distance of the step end face the left steel ball hole [15] greater than the diameter of steel ball [12]; The inner port of volution [13] centre hole has circular conical surface [14], the dredging flow groove that on the step end face between left unloading hole [10] and the left steel ball hole [15], has at least one to be communicated with left unloading hole [10]; Left side steel ball hole [15] is gone up the width L of arc groove [6] less than nut [3] to the distance of annular groove [9] left hand edge; When steering nut [2] when being positioned at right unloaded position; Arc groove [6] is communicated with left steel ball hole [15] with annular groove [9], left chamber [5] is communicated with right chamber [4] through annular groove [9], arc groove [6], left steel ball hole [15], left unloading hole [10], dredging flow groove and blind hole [7];
(2) external port at right unloading hole [8] has the right steel ball hole [17] of a diameter greater than right unloading hole [8]; The external port of right steel ball hole [17] is positioned on the face of cylinder of steering nut [2]; Right steel ball hole [17] and right unloading hole [8] form a stepped hole; A steel ball [12] is arranged in right steel ball hole [17]; The diameter of steel ball [12] is greater than the aperture of right unloading hole [8], and the degree of depth of right steel ball hole [17] is greater than the diameter of steel ball [12], and the external port of right unloading hole [8] has circular conical surface [18]; Right steel ball hole [17] equates with the distance of left steel ball hole [15] to annular groove [9] left hand edge to the distance of annular groove [9] right hand edge; When steering nut [2] when being positioned at left unloaded position, arc groove [6] is communicated with right steel ball hole [17] with annular groove [9], and right chamber [4] is communicated with left chamber [5] through blind hole [7], right unloading hole [8], right steel ball hole [17], arc groove [6] and annular groove [9].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110150927.XA CN102815334B (en) | 2011-06-08 | 2011-06-08 | Travel unloading mechanism of recirculating ball-type power steering gear of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110150927.XA CN102815334B (en) | 2011-06-08 | 2011-06-08 | Travel unloading mechanism of recirculating ball-type power steering gear of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102815334A true CN102815334A (en) | 2012-12-12 |
| CN102815334B CN102815334B (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110150927.XA Active CN102815334B (en) | 2011-06-08 | 2011-06-08 | Travel unloading mechanism of recirculating ball-type power steering gear of automobile |
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| Country | Link |
|---|---|
| CN (1) | CN102815334B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3896702A (en) * | 1973-07-27 | 1975-07-29 | Trw Inc | Power steering gear with relief valve on power piston |
| 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 |
| CN1789056A (en) * | 2005-12-27 | 2006-06-21 | 江苏罡阳股份有限公司 | Built-in type positioning and unloading device for auto power diverter |
-
2011
- 2011-06-08 CN CN201110150927.XA patent/CN102815334B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3896702A (en) * | 1973-07-27 | 1975-07-29 | Trw Inc | Power steering gear with relief valve on power piston |
| 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 |
| CN1789056A (en) * | 2005-12-27 | 2006-06-21 | 江苏罡阳股份有限公司 | Built-in type positioning and unloading device for auto power diverter |
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| Publication number | Publication date |
|---|---|
| CN102815334B (en) | 2015-01-21 |
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| Date | Code | Title | Description |
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| 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 | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 453003 No. 322 Heping Avenue, Henan, Xinxiang Patentee after: YUBEI STEERING SYSTEM (XINXIANG) CO.,LTD. Address before: 453003 No. 322 Heping Avenue, Henan, Xinxiang Patentee before: YUBEI STEERING SYSTEM Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 2398 Muye Avenue, high tech Zone, Xinxiang City, Henan Province Patentee after: North Henan Steering System (Xinxiang) Co.,Ltd. Address before: 453003 No. 322 Heping Avenue, Henan, Xinxiang Patentee before: YUBEI STEERING SYSTEM (XINXIANG) CO.,LTD. |