CN205186270U - Through screw rod changes valve circulation ball power steering - Google Patents
Through screw rod changes valve circulation ball power steering Download PDFInfo
- Publication number
- CN205186270U CN205186270U CN201520827116.2U CN201520827116U CN205186270U CN 205186270 U CN205186270 U CN 205186270U CN 201520827116 U CN201520827116 U CN 201520827116U CN 205186270 U CN205186270 U CN 205186270U
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- screw rod
- piston
- valve
- rotary valve
- rod rotary
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Abstract
The utility model discloses a through screw rod changes valve circulation ball power steering, including casing, screw rod commentaries on classics valve, rocking arm, the screw rod changes the valve to be link up the casing, the valve body is installed to the one end of casing, the casing with valve body fixed connection, the screw rod changes the one end of valve and installs on the valve body, the screw rod changes the other end of valve and installs on the casing, the cover is established and is being had the piston on the screw rod commentaries on classics valve, be provided with first spiral raceway on the one end hole of piston, the other end outside of piston is provided with the rack, first spiral raceway with the rack is followed the piston axial distributes in different positions, the rack with the rocker -arm drive is connected, be provided with second spiral raceway on the screw rod commentaries on classics valve, second spiral raceway with be provided with steel ball and pipe between the first spiral raceway, the utility model discloses avoid steering gear during operation piston to receive the damage because of being out of shape, guaranteed the precision persistence that turns to, reduced the operation degree of difficulty.
Description
Technical field
The utility model relates to bogie of car, especially a kind of through screw rod rotary valve recirculating ball power steering gear.
Background technology
Commercial vehicle/comm..vehicle is used for loading and transporting cargo, and its front axle load is comparatively large, in operational process, if just rely on manpower steering wheel rotation to turn to, is gruelling; Therefore commercial vehicle/comm..vehicle steering swivel system has generally installed recirculating ball power steering gear, when motor turning, for driver provides power-assisted, to alleviate the working strength of driver.
What the control cock of current deflector adopted substantially is rotary valve structure, and the structure of this valve continues to use the modification in construction of first generation liberation valve mostly, and the structure of therefore deflector is also that Expansion development is out on the basis liberating valve.The feature of this kind of deflector is structure relative compact, but the tooth bar of piston and spiral rolling track are in the same position of piston, when deflector works, when piston is subject to the antagonistic force of hydraulic pressure and rocker shaft, tooth bar and spiral rolling track can produce distortion, and both distortion produced is because distance is very near, distortion can stack up and produce more large deformation.Because the accuracy requirement of spiral rolling track is very high, be out of shape excessive after, cannot make steel ball spiral rolling track inner equilibrium slide, thus produce turn to hair fastener.Simultaneously because screw rod is non-penetrating formula screw rod, therefore piston steadily movement in housing oil pocket cannot be made, thus make the retard motion of piston, cause hard steering.
Utility model content
The utility model, for the deficiencies in the prior art, provides the through screw rod rotary valve recirculating ball power steering gear of a kind of very big reduction piston deformation.
For achieving the above object, the utility model can be taked with following technical proposals: through screw rod rotary valve recirculating ball power steering gear, comprise housing, screw rod rotary valve, rocking arm, the through described housing of described screw rod rotary valve, one end of described housing is provided with valve body, described housing is fixedly connected with described valve body, and one end of described screw rod rotary valve is arranged on described valve body, and the other end of described screw rod rotary valve is installed on the housing; Described screw rod rotary valve is arranged with piston, one end endoporus of described piston is provided with the first spiral rolling track, the other end outer setting of described piston has tooth bar, described first spiral rolling track and described tooth bar are along described the axis of the piston to being distributed in diverse location, described tooth bar is connected with described rocking-arm driving, described screw rod rotary valve is provided with the second spiral rolling track, between described second spiral rolling track and described first spiral rolling track, is provided with steel ball and conduit.
In the utility model one embodiment, the distance between described first spiral rolling track and described tooth bar is more than or equal to 0, and is less than or equal to the length of 1/2 piston.
In the utility model one embodiment, one end of described screw rod rotary valve is provided with boss, and described boss is fixedly mounted in described valve body by bearing, and the other end of described screw rod rotary valve is arranged in the mounting hole of described housing away from described valve body one end.
In the utility model one embodiment, described piston is provided with limit valve, described limit valve and described tooth bar lay respectively at the both sides of described screw rod rotary valve.
In the utility model one embodiment, described piston is flexibly connected with described housing, and described piston is positioned at described enclosure interior, and described piston and described housing form the first oil pocket and the second oil pocket.
In the utility model one embodiment, described first oil pocket is all connected with described limit valve with the second oil pocket.
The utility model has following remarkable technique effect:
First spiral rolling track and tooth bar are separately positioned on the diverse location on the axis of the piston, the second spiral rolling track on first spiral rolling track and screw rod rotary valve matches, when piston is stressed, the power that power is applied on the power of the first spiral rolling track and tooth bar occurs on the diverse location of piston; First spiral rolling track is separated with tooth bar, thus the deformation that both produce can not superpose, thus when avoiding deflector work, piston is damaged because of distortion, the efficiency that impact is rotated and precision.Meanwhile, when piston moves to end position in the oil pocket that housing is formed, limit valve can be opened, and the oil pocket at piston two ends is connected, thus deflector operation pressure is sharply declined, and avoids deflector impaired in end position work.
Accompanying drawing explanation
Fig. 1 is cutaway view of the present utility model;
Fig. 2 is part sectional view of the present utility model;
Fig. 3 is assist characteristic curve of the present utility model.
1, housing; 2, screw rod rotary valve; 3, rocking arm; 4, valve body; 5, piston; 6, the first spiral rolling track; 7, tooth bar; 8, the second spiral rolling track; 9, steel ball; 10, conduit; 11, boss; 12, limit valve; 101, the first oil pocket; 102, the second oil pocket.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing (1 to 3), the utility model is described in further detail.
Through screw rod rotary valve recirculating ball power steering gear involved by the utility model, comprise housing 1, screw rod rotary valve 2, rocking arm 3, the through described housing 1 of described screw rod rotary valve 2, one end of described housing 1 is provided with valve body 4, described housing 1 is fixedly connected with described valve body 4, one end of described screw rod rotary valve 2 is arranged on described valve body 4, and the other end of described screw rod rotary valve 2 is arranged on described housing 1; One end of described screw rod rotary valve 2 is provided with boss 11, and described boss 11 is fixedly mounted in described valve body 4 by bearing, and the other end of described screw rod rotary valve 2 is arranged in the mounting hole 22 of described housing 1 away from described valve body 4 one end.The boss end of through screw rod rotary valve is arranged in valve body 4, plane needle bearing is equipped with at boss 11 two ends, be fixed on valve body 4 by upper cover and pad again, the other end of screw rod rotary valve 2 is arranged on the endoporus bottom housing 1, like this, ensure that there is support at the two ends of screw rod rotary valve, make screw rod rotary valve uniform force.
Described screw rod rotary valve 2 is arranged with piston 5, one end endoporus of described piston 5 is provided with the first spiral rolling track 6, the other end outer setting of described piston 5 has tooth bar 7, described first spiral rolling track 6 with described tooth bar 7 along described piston 5 axial distribution at diverse location, distance between described first spiral rolling track 6 and described tooth bar 7 is more than or equal to 0, and is less than or equal to the length of 1/2 piston 5.Described tooth bar 7 is in transmission connection with described rocking arm 3, described screw rod rotary valve 2 is provided with the second spiral rolling track 8, is provided with steel ball 9 and conduit 10 between described second spiral rolling track 8 and described first spiral rolling track 6.
Described piston 5 is provided with limit valve 12, and described limit valve 12 and described tooth bar 7 lay respectively at the both sides of described screw rod rotary valve 2.Sliding block joint between described piston 5 and described housing 1, described piston 5 is positioned at the oil pocket that described housing 1 is formed, described piston 5 forms the first oil pocket 101 and the second oil pocket 102 with described housing 1, described first oil pocket 101 and the second oil pocket 102 lay respectively at the both sides of piston 5, when limit valve 12 is opened, described first oil pocket 101 is all connected with described limit valve 12 with the second oil pocket 102.
Valve body 4 is fixed on housing 1 by hexagonal bar iron, housing 1 plunger shaft is built with piston 5, piston one end endoporus has the first spiral rolling track 6, other end outside is provided with tooth bar 7, tooth bar 7 is separated with the first spiral rolling track, and when piston 5 is stressed, masterpiece is used in the different parts of piston 5, can not deformational overprint be produced, thus serious destruction can not be caused to deflector piston.Meanwhile, the first spiral roll on piston 5 and screw rod rotary valve and the lead screw transmission of steel ball and catheter combination forming cycle ball, namely when screw rod rotary valve rotates, piston can in housing 1 chamber sway, the direction of movement is relevant with the rotation direction of the first spiral rolling track.
With on piston direction in 90 °, be provided with rocking arm 3 axle of band gear, rocking arm 3 axle is arranged on housing 1 by side cover and needle bearing, and the tooth of rocking arm 3 is meshed with tooth bar 7, and when piston is in housing chamber during side-to-side movement, rocking arm 3 can cw or rotate counterclockwise.Like this, the rotation of screw rod rotary valve has just been arrived on rocking arm 3 by tooth bar 7 and gear transmission, rocking arm 3 axle is rotated, thus realizes turning to of vehicle.
When piston 5 sway is to certain position, limit valve 12 can be opened, and the first oil pocket 101 and the second oil pocket 102 are communicated, and such deflector operation pressure can sharply decline, and avoids deflector to damage deflector in end position work.Through screw rod rotary valve is when rotating, oil duct in rotary valve can open and close accordingly, distribute the high pressure oil of oil inlet, according to the difference of screw rod rotary valve 2 rotation direction, enter the first oil pocket 101 and the second oil pocket 102 in housing 1 respectively, when high pressure oil acts on piston, thrust can be produced to piston, thrust is delivered on rocker shaft 3 gear by tooth bar, makes oil pressure pressure be converted into the output torque of rocker shaft 3, easily knows according to mechanics principle:
In order to make driver drive a car turn to time, there is good operating handle, the power-assisted curve of through screw rod rotary valve is typically designed to shown in accompanying drawing 3, namely the operation pressure of deflector increases along with the hand-power increase of chaufeur steering wheel rotation, general is parabola by Curve Design, again according to different needs, adjust parabolical shape and size.
Above-mentioned specific embodiment is only used to explain bright the utility model; but not be that the utility model is limited; in the protection domain of aim of the present utility model and claim; to any replacement and change of not paying creative work that the utility model is made, all fall into the protection domain of the utility model patent.
Claims (6)
1. a through screw rod rotary valve recirculating ball power steering gear, comprise housing, screw rod rotary valve, rocking arm, it is characterized in that, the through described housing of described screw rod rotary valve, one end of described housing is provided with valve body, described housing is fixedly connected with described valve body, and one end of described screw rod rotary valve is arranged on described valve body, and the other end of described screw rod rotary valve is installed on the housing; Described screw rod rotary valve is arranged with piston, one end endoporus of described piston is provided with the first spiral rolling track, the other end outer setting of described piston has tooth bar, described first spiral rolling track and described tooth bar are along described the axis of the piston to being distributed in diverse location, described tooth bar is connected with described rocking-arm driving, described screw rod rotary valve is provided with the second spiral rolling track, between described second spiral rolling track and described first spiral rolling track, is provided with steel ball and conduit.
2. through screw rod rotary valve recirculating ball power steering gear as claimed in claim 1, it is characterized in that, the distance between described first spiral rolling track and described tooth bar is more than or equal to 0, and is less than or equal to the length of 1/2 piston.
3. through screw rod rotary valve recirculating ball power steering gear as claimed in claim 1, it is characterized in that, one end of described screw rod rotary valve is provided with boss, described boss is fixedly mounted in described valve body by bearing, and the other end of described screw rod rotary valve is arranged in the mounting hole of described housing away from described valve body one end.
4. through screw rod rotary valve recirculating ball power steering gear as claimed in claim 1, it is characterized in that, described piston is provided with limit valve, described limit valve and described tooth bar lay respectively at the both sides of described screw rod rotary valve.
5. through screw rod rotary valve recirculating ball power steering gear as claimed in claim 4, it is characterized in that, described piston is flexibly connected with described housing, and described piston is positioned at described enclosure interior, and described piston and described housing form the first oil pocket and the second oil pocket.
6. through screw rod rotary valve recirculating ball power steering gear as claimed in claim 5, it is characterized in that, described first oil pocket is all connected with described limit valve with the second oil pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520827116.2U CN205186270U (en) | 2015-10-23 | 2015-10-23 | Through screw rod changes valve circulation ball power steering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520827116.2U CN205186270U (en) | 2015-10-23 | 2015-10-23 | Through screw rod changes valve circulation ball power steering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205186270U true CN205186270U (en) | 2016-04-27 |
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ID=55779290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520827116.2U Active CN205186270U (en) | 2015-10-23 | 2015-10-23 | Through screw rod changes valve circulation ball power steering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205186270U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108528521A (en) * | 2018-05-15 | 2018-09-14 | 杭州世宝汽车方向机有限公司 | Recirculating ball power steering gear |
| CN116101370A (en) * | 2023-02-24 | 2023-05-12 | 浙江宸嘉液压科技有限公司 | Hydraulic steering gear rotary valve of commercial vehicle |
-
2015
- 2015-10-23 CN CN201520827116.2U patent/CN205186270U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108528521A (en) * | 2018-05-15 | 2018-09-14 | 杭州世宝汽车方向机有限公司 | Recirculating ball power steering gear |
| CN116101370A (en) * | 2023-02-24 | 2023-05-12 | 浙江宸嘉液压科技有限公司 | Hydraulic steering gear rotary valve of commercial vehicle |
| CN116101370B (en) * | 2023-02-24 | 2023-08-18 | 浙江宸嘉液压科技有限公司 | Hydraulic steering gear rotary valve of commercial vehicle |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |