CN102815334B - 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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- CN102815334B CN102815334B CN201110150927.XA CN201110150927A CN102815334B CN 102815334 B CN102815334 B CN 102815334B CN 201110150927 A CN201110150927 A CN 201110150927A CN 102815334 B CN102815334 B CN 102815334B
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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 automobile power steering technology, relate to the improvement to automobile circulating ball type power steering gears.
Background technology
Chinese invention patent application " automobile circulating ball type power steering gears stroke unloading-structure " (application number: the stroke unloading-structure 201110117749.0) disclosing a kind of automobile circulating ball type power steering gears, this application simplifies the structure of original stroke unloading mechanism, facilitate processing, reduce cost.Its shortcoming is: there is the problem that power-assisted lost efficacy under specific circumstances, such as, when automotive wheel unloaded position be stuck or be absorbed in pit be difficult to rotate, because left chamber is communicated with right chamber, during contrarotation bearing circle, deflector internal pressure cannot be set up, and can not produce power-assisted, manual torque can only be used to make wheel just return, cause contrarotation bearing circle to require great effort very much.
Summary of the invention
The object of the invention is: propose a kind of automobile circulating ball type power steering gears stroke unloading-structure that power-assisted can be avoided to lose efficacy.
Technical scheme of the present invention is: automobile circulating ball type power steering gears stroke unloading mechanism, comprise deflector lower house 1, steering nut 2 and the combination sealing assembly 3 being positioned at seal groove on the steering nut 2 right-hand member face of cylinder, have in steering nut 2 left end bottom and fan with the tooth on rocker shaft 11 tooth bar engaged, keep free-running fit in the cylindrical right chamber 4 that the right-hand member of steering nut 2 inserts lower house 1, combination sealing assembly 3 is by the clearance seal between the steering nut 2 right-hand member face of cylinder and right chamber 4 inwall, steering nut 2 left side and following lower housing cavity form left chamber 5, right chamber 4 is communicated with respectively by the port that the oil circuit of lower house 1 inside is corresponding to rotary valve mechanism with left chamber 5, the first half face of cylinder of steering nut 2 and the upper inside wall of lower house 1 inner chamber are fitted, have an arc groove along the circumferential direction stretched 6 in the upper inside wall of lower house 1 inner chamber, this arc groove 6 is L along the width of steering nut 2 axis, and the distance between the vertical split of this arc groove 6 broad ways and the vertical split of rocker shaft 11 is D, one is had perpendicular to the blind hole 7 of right side on the top of the right side of steering nut 2, a left unloading hole 10 and right unloading hole 8 is had on the top on steering nut 2 face of cylinder, the inner port of left 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, an annular groove 9 is had on the face of cylinder of steering nut 2, between left unloading hole 10 and right unloading hole 8, it is characterized in that:
(1) diameter is had to be greater than the left steel ball hole 15 of left unloading hole 10 in the external port of left unloading hole 10, the external port of left steel ball hole 15 is positioned on the face of cylinder of steering nut 2, left steel ball hole 15 and left unloading hole 10 form a stepped hole, at left steel ball hole 15 near the part of external port with negative thread 16, a volution 13 is had to be screwed in negative thread 16, a steel ball 12 is had in the unthreaded hole part of left steel ball hole 15, the diameter of steel ball 12 is greater than the aperture of left unloading hole 10 and volution 13 centre hole, distance from volution 13 inner end surface to the step end face left unloading hole 10 and left steel ball hole 15 is greater than the diameter of steel ball 12, the inner port of volution 13 centre hole is with circular conical surface 14, step end face between left unloading hole 10 with left steel ball hole 15 there is the dredging flow groove that at least one is communicated with left unloading hole 10, left steel ball hole 15 is less than the width L of arc groove 6 on steering nut 2 to the distance of annular groove 9 left hand edge, when steering nut 2 is positioned at right unloaded position, left steel ball hole 15 is communicated with annular groove 9 by arc groove 6, and left chamber 5 is communicated with right chamber 4 by annular groove 9, arc groove 6, left steel ball hole 15, left unloading hole 10, dredging flow groove and blind hole 7,
(2) diameter is had to be greater than the right steel ball hole 17 of right unloading hole 8 in the external port of 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 had in right steel ball hole 17, 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 is with circular conical surface 18, right steel ball hole 17 is equal to the distance of annular groove 9 left hand edge with left steel ball hole 15 to the distance of annular groove 9 right hand edge, when steering nut 2 is positioned at left unloaded position, right steel ball hole 17 is communicated with annular groove 9 by arc groove 6, make right chamber 4 by blind hole 7, right unloading hole 8, right steel ball hole 17, arc groove 6 is communicated with left chamber 5 with annular groove 9.
Advantage of the present invention is: automobile circulating ball type power steering gears stroke unloading-structure can be avoided to occur under specific circumstances the problem that power-assisted lost efficacy improve reliability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the enlarged drawing of local A in the present invention.
Detailed description of the invention
Below the present invention is described in further details.See Fig. 1, 2, automobile circulating ball type power steering gears stroke unloading mechanism, comprise deflector lower house 1, steering nut 2 and the combination sealing assembly 3 being positioned at seal groove on the steering nut 2 right-hand member face of cylinder, have in steering nut 2 left end bottom and fan with the tooth on rocker shaft 11 tooth bar engaged, keep free-running fit in the cylindrical right chamber 4 that the right-hand member of steering nut 2 inserts lower house 1, combination sealing assembly 3 is by the clearance seal between the steering nut 2 right-hand member face of cylinder and right chamber 4 inwall, steering nut 2 left side and following lower housing cavity form left chamber 5, right chamber 4 is communicated with respectively by the port that the oil circuit of lower house 1 inside is corresponding to rotary valve mechanism with left chamber 5, the first half face of cylinder of steering nut 2 and the upper inside wall of lower house 1 inner chamber are fitted, have an arc groove along the circumferential direction stretched 6 in the upper inside wall of lower house 1 inner chamber, this arc groove 6 is L along the width of steering nut 2 axis, and the distance between the vertical split of this arc groove 6 broad ways and the vertical split of rocker shaft 11 is D, one is had perpendicular to the blind hole 7 of right side on the top of the right side of steering nut 2, a left unloading hole 10 and right unloading hole 8 is had on the top on steering nut 2 face of cylinder, the inner port of left 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, an annular groove 9 is had on the face of cylinder of steering nut 2, between left unloading hole 10 and right unloading hole 8, it is characterized in that:
(1) diameter is had to be greater than the left steel ball hole 15 of left unloading hole 10 in the external port of left unloading hole 10, the external port of left steel ball hole 15 is positioned on the face of cylinder of steering nut 2, left steel ball hole 15 and left unloading hole 10 form a stepped hole, at left steel ball hole 15 near the part of external port with negative thread 16, a volution 13 is had to be screwed in negative thread 16, a steel ball 12 is had in the unthreaded hole part of left steel ball hole 15, the diameter of steel ball 12 is greater than the aperture of left unloading hole 10 and volution 13 centre hole, distance from volution 13 inner end surface to the step end face left unloading hole 10 and left steel ball hole 15 is greater than the diameter of steel ball 12, the inner port of volution 13 centre hole is with circular conical surface 14, step end face between left unloading hole 10 with left steel ball hole 15 there is the dredging flow groove that at least one is communicated with left unloading hole 10, left steel ball hole 15 is less than the width L of arc groove 6 on steering nut 2 to the distance of annular groove 9 left hand edge, when steering nut 2 is positioned at right unloaded position, left steel ball hole 15 is communicated with annular groove 9 by arc groove 6, and left chamber 5 is communicated with right chamber 4 by annular groove 9, arc groove 6, left steel ball hole 15, left unloading hole 10, dredging flow groove and blind hole 7,
(2) diameter is had to be greater than the right steel ball hole 17 of right unloading hole 8 in the external port of 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 had in right steel ball hole 17, 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 is with circular conical surface 18, right steel ball hole 17 is equal to the distance of annular groove 9 left hand edge with left steel ball hole 15 to the distance of annular groove 9 right hand edge, when steering nut 2 is positioned at left unloaded position, right steel ball hole 17 is communicated with annular groove 9 by arc groove 6, make right chamber 4 by blind hole 7, right unloading hole 8, right steel ball hole 17, arc groove 6 is communicated with left chamber 5 with annular groove 9.
Principle of work of the present invention is: to be stuck in left unloaded position when wheel or to be absorbed in pit, during bearing circle contrarotation, left chamber 5 switches with right chamber 4 high pressure oil, left chamber 5 enters high pressure oil, and in right steel ball hole 17, steel ball 12 and circular conical surface 18 form conical surface seal, and left chamber 5 is not communicated with right chamber 4, left chamber forms high-voltage oil cavity, produce power-assisted, alleviate steering wheel rotation manual torque, be convenient to wheel and just return;
To be stuck in right unloaded position when wheel or to be absorbed in pit, during bearing circle contrarotation, left chamber 5 switches with right chamber 4 high pressure oil, right chamber 4 enters high pressure oil, and in left steel ball hole 15, steel ball 12 is formed conical surface seal by Oil shocking to the circular conical surface 14 of volution 13 inner port, and left chamber 5 is not communicated with right chamber 4, right chamber forms high-voltage oil cavity, produce power-assisted, alleviate steering wheel rotation manual torque, be convenient to wheel and just return.
Claims (1)
1. automobile circulating ball type power steering gears stroke unloading mechanism, comprise deflector lower house (1), steering nut (2) and be positioned at the combination sealing assembly (3) of seal groove on steering nut (2) the right-hand member face of cylinder, have in steering nut (2) left end bottom and fan with the tooth on rocker shaft (11) tooth bar engaged, keep free-running fit in the cylindrical right chamber (4) that the right-hand member of steering nut (2) inserts lower house (1), combination sealing assembly (3) is by the clearance seal between steering nut (2) the right-hand member face of cylinder and right chamber (4) inwall, steering nut (2) left side and following lower housing cavity form left chamber (5), right chamber (4) is communicated with respectively by the port that the oil circuit that lower house (1) is inner is corresponding to rotary valve mechanism with left chamber (5), the first half face of cylinder of steering nut (2) and the upper inside wall of lower house (1) inner chamber are fitted, an arc groove along the circumferential direction stretched (6) is had in the upper inside wall of lower house (1) inner chamber, this arc groove (6) is L along the width that steering nut (2) is axial, and the distance between the vertical split of this arc groove (6) broad ways and the vertical split of rocker shaft (11) is D, a blind hole perpendicular to right side (7) is had on the top of the right side of steering nut (2), a left unloading hole (10) and right unloading hole (8) is had on the top on steering nut (2) face of cylinder, the inner port of left 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), an annular groove (9) is had on the face of cylinder of steering nut (2), between left unloading hole (10) and right unloading hole (8), it is characterized in that:
(1) diameter is had to be greater than the left steel ball hole (15) of left unloading hole (10) in the external port of left unloading hole (10), the external port of left steel ball hole (15) is positioned on the face of cylinder of steering nut (2), left steel ball hole (15) and left unloading hole (10) form a stepped hole, at left steel ball hole (15) near the part of external port with negative thread (16), a volution (13) is had to be screwed in negative thread (16), a steel ball (12) is had in the unthreaded hole part of left steel ball hole (15), the diameter of steel ball (12) is greater than the aperture of left unloading hole (10) and volution (13) centre hole, distance from volution (13) inner end surface to the step end face left unloading hole (10) and left steel ball hole (15) is greater than the diameter of steel ball (12), the inner port of volution (13) centre hole is with circular conical surface (14), step end face between left unloading hole (10) with left steel ball hole (15) there is the dredging flow groove that at least one is communicated with left unloading hole (10), left steel ball hole (15) is less than to the distance of annular groove (9) left hand edge the width L that steering nut (2) goes up arc groove (6), when steering nut (2) is positioned at right unloaded position, left steel ball hole (15) is communicated with annular groove (9) by arc groove (6), and left chamber (5) is communicated with right chamber (4) with blind hole (7) by annular groove (9), arc groove (6), left steel ball hole (15), left unloading hole (10), dredging flow groove,
(2) diameter is had to be greater than the right steel ball hole (17) of right unloading hole (8) in the external port of 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 had in right steel ball hole (17), 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) is with circular conical surface (18), right steel ball hole (17) is equal to the distance of annular groove (9) left hand edge with left steel ball hole (15) to the distance of annular groove (9) right hand edge, when steering nut (2) is positioned at left unloaded position, right steel ball hole (17) is communicated with annular groove (9) by arc groove (6), make right chamber (4) by blind hole (7), right unloading hole (8), right steel ball hole (17), arc groove (6) is communicated with left chamber (5) with 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 CN102815334A (en) | 2012-12-12 |
| CN102815334B true 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 positioning unloading device of automobile power steering gear |
-
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 positioning unloading device of automobile power steering gear |
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| Publication number | Publication date |
|---|---|
| CN102815334A (en) | 2012-12-12 |
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| C06 | Publication | ||
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| 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. |