CN205131362U - Rack and pinion hydrostatic steering unit's rack control structure - Google Patents
Rack and pinion hydrostatic steering unit's rack control structure Download PDFInfo
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- CN205131362U CN205131362U CN201520928301.0U CN201520928301U CN205131362U CN 205131362 U CN205131362 U CN 205131362U CN 201520928301 U CN201520928301 U CN 201520928301U CN 205131362 U CN205131362 U CN 205131362U
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- rack
- tooth bar
- oil
- piston
- control structure
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Abstract
The utility model relates to a rack and pinion hydrostatic steering unit's rack control structure belongs to zero technical field of hydrostatic steering unit. It comprises hydro -cylinder, rack, blanking cover, oil blanket, piston and resistance valve: movable mounting has the rack in the hydro -cylinder, is equipped with the piston on the rack admittedly, the hydro -cylinder excircle of piston both sides is equipped with the glib and right glib talker in a left side on the surface respectively admittedly, the resistance valve is equipped with in left side glib talker and the right glib talker respectively. This rack control structure adopts the structural design who has added the resistance valve in current left and right glib talker, and the hydraulic oil oil return speed when utilizing the rack to receive the impact quick travel in the hydro -cylinder is big, and characteristics that the return pressure is high start and close the resistance valve and make the unable backward flow of hydraulic oil, and then reach the purpose that prevents the rack to remove. Have simple structure, low in manufacturing cost's characteristics, have positive meaning to the security performance of carrying high tooth wheel rack hydrostatic steering unit with the life who lengthens rack and pinion hydrostatic steering unit.
Description
Technical field
The utility model relates to a kind of tooth bar control structure of rack-and-gear hydraulic steering gear, belongs to hydraulic steering gear parts technical field.
Background technology
At home in automotive market, light bus, commercial vehicle, car, micro-car many employings rack-and-gear hydraulic steering gear.Rack-and-gear hydraulic steering gear is the object moving axially to reach control motor turning by controlling tooth bar.
The tooth bar control setup that current rack-and-gear hydraulic steering gear is commonly used is due to reasons in structure, when car load is through uneven road surface of jolting, when wheel is subject to impacting, wherein a fraction of impulsive force can be delivered to tooth bar by steering track rod, and then promotes tooth bar and in tooth bar control setup, produce fast speed move axially.Tooth bar will impact rack shaft in the process of quick travel, and the impulsive force of tooth bar is delivered on the bearing circle that is connected with rack shaft by rack shaft, finally feeds back to the chaufeur that drives a car on hand, causes the generation of bearing circle " hired roughneck " phenomenon.The generation of " hired roughneck " phenomenon not only can affect car load driver comfort, and tooth bar engaging tooth shape position can be caused to occur rippling and over worn problem, finally causes the service life of automobile gear tooth bar hydraulic steering gear short, the problem of poor safety performance.Therefore being necessary to research and develop a kind of automobile through jolting ground, the tooth bar control setup that tooth bar moves axially can be slowed down.Thus elimination tooth bar quick travel produces " hired roughneck " phenomenon, and then improve the safety performance of rack-and-gear hydraulic steering gear and extend the service life of rack-and-gear hydraulic steering gear.
Summary of the invention
The purpose of this utility model is: provide a kind of structure simple, easy to maintenance, to solve the rack-and-gear hydraulic steering gear poor safety performance that existing tooth bar control setup causes because of " hired roughneck " phenomenon, service life short problem the tooth bar control structure of rack-and-gear hydraulic steering gear.
The technical solution of the utility model is:
A tooth bar control structure for rack-and-gear hydraulic steering gear, it is made up of oil cylinder, tooth bar, blanking cover, oil sealing, piston, left oil nozzle, right oil nozzle and resistance valves; It is characterized in that: the oil sealing arranged by symmetry shape in oil cylinder and blanking cover are movably installed with tooth bar, and the tooth bar between oil sealing is fixed with piston; The oil cylinder of piston both sides is respectively arranged with left oil nozzle and right oil nozzle, in left oil nozzle and right oil nozzle, respectively resistance valves is housed.
Described resistance valves is made up of valve body, cone-shaped spring, plug and bottom: valve body is the cylinder of band ladder endoporus, and bottom is equipped with in termination, valve body one end, and be movably installed with plug by cone-shaped spring in the valve body of bottom side, plug is connected with bottom Intermittent Contact.
Described plug is bullet, and the bottom face of plug has oil groove.
The ladder endoporus step place cross-sectional plane of described valve body is tapered.
Described bottom is torus.
The beneficial effects of the utility model are:
This tooth bar control structure adopts the structure design adding resistance valves in the left and right oil nozzle of existing control setup, utilize tooth bar be hit quick travel time in-oil cylinder hydraulic oil oil return speed large, the feature that spill pressure is high, starting closedown resistance valves makes hydraulic oil reflux, thus reaches the object stoping tooth bar movement.And then solving existing automobile through jolting road surface, bearing circle produces the problem of " hired roughneck " fault.This tooth bar control structure has that structure is simple, the feature of low cost of manufacture; To the service life of the safety performance and prolongation rack-and-gear hydraulic steering gear that improve rack-and-gear hydraulic steering gear, there is positive meaning.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model resistance valves.
In figure: 1, oil cylinder, 2, tooth bar, 3, blanking cover, 4, oil sealing, 5, piston, 6, left oil nozzle, 7, right oil nozzle, 8, valve body, 9, cone-shaped spring, 10, plug, 11, bottom, 12, oil groove, 13, ladder endoporus.
Detailed description of the invention
The tooth bar control structure of this rack-and-gear hydraulic steering gear is made up of oil cylinder 1, tooth bar 2, blanking cover 3, oil sealing 4, piston 5, left oil nozzle 6, right oil nozzle 7 and resistance valves: the oil sealing 4 arranged by symmetry shape in oil cylinder 1 and blanking cover 3 are movably installed with tooth bar 2.Oil sealing 4 pairs of oil cylinders 1 seal, and can prevent hydraulic fluid leak in oil cylinder 1.
Tooth bar 2 between oil sealing 4 is fixed with piston 5; Oil cylinder 1 outer round surface of piston 5 both sides is fixed with left oil nozzle 6 and right oil nozzle 7 respectively.Left oil nozzle 6 is communicated with oil cylinder 1 respectively with right oil nozzle 7; Respectively resistance valves is housed in left oil nozzle 6 and right oil nozzle 7.
Resistance valves is made up of valve body 8, cone-shaped spring 9, plug 10 and bottom 11: valve body 8 is the cylinder of band ladder endoporus 13, and ladder endoporus 13 step place cross-sectional plane is tapered.Termination, valve body 8 one end is fixed with in toric bottom 11 by the mode of revolving riveting.By cone-shaped spring 9, plug 10 is housed actively in the valve body 8 of bottom 11 side, plug 10 is bullet, the conical suface of plug 10 is corresponding with the conical suface at ladder endoporus 13 step place, when the conical suface of plug 10 and the conical suface at ladder endoporus 13 step place fit, and can sealed valve body 8.The bottom face of plug 10 has oil groove 12.Plug 10 is connected with bottom 11 Intermittent Contact.
Work as automobile normal running, when the tooth bar control setup of this rack-and-gear hydraulic steering gear normally works and needs tooth bar 2 to move right, hydraulic oil by entering into oil cylinder 1 after left oil nozzle 6 behind the gap between resistance valves plug 10 and valve body 8 and oil groove 12.The hydraulic oil entered in oil cylinder 1 will promote tooth bar 2 by piston 5 and move right.Tooth bar 2 move right to be in process hydraulic oil on the right side of piston 5 in oil cylinder 1 by with lower normal flow velocity by refluxing after the resistance valves in right oil nozzle 7.Now, the flow velocity of hydraulic oil is low, and the hydraulic coupling of hydraulic oil to plug 10 is less than the deformation power of cone-shaped spring 9; Have gap between plug 10 and valve body 8, resistance valves can not hermetically closing.Hydraulic oil by after oil groove 12 by gap oil return in valve body 8.If need tooth bar to be moved to the left, then need pass into hydraulic oil from right oil nozzle 7, now, the hydraulic oil on the left of piston 5 in oil cylinder 1 is by the resistance valves backflow in left oil nozzle 6.
When on road surface of jolting, automobile occurs that the generation of high capacity high-frequency bump steer pull bar promotion tooth bar 2 moves axially, drive piston 5 is produced axial motion by tooth bar 2 together.Now piston 5 oppresses hydraulic oil in oil cylinder 1 by refluxing after resistance valves.Now hydraulic oil return velocity is larger than normal flow, and the spill pressure that hydraulic oil produces is by the plug 10 of the deformation power and then upwards jack-up resistance valves that overcome the cone-shaped spring 9 of resistance valves.When plug 10 contacts with the valve body 8 of resistance valves, plug 10 is by hermetic resistance valve.By the backflow oil circuit of cutting-off liquid force feed after resistance valves sealing, the oil cylinder of piston moving direction is made to form seal cavity.The hydraulic oil being in seal cavity will produce flowed friction in oil cylinder inside.Flowed friction acts on piston 5, and stops the continuation of tooth bar 2 to be moved by piston 5.Thus reach solution vehicle steering produces " hired roughneck " fault object at the road surface bearing circle that jolts.
When automobile recovers smooth-ride, the impulsive force suffered by tooth bar 2 is eliminated; Tooth bar 2 will stop axial motion; Now, the plug 10 of resistance valves resets under the effect of cone-shaped spring 9, reopens the oil circuit of resistance valves, makes this tooth bar control setup enter normal mode of operation.
This tooth bar control setup adopts the structure design adding resistance valves in the left and right oil nozzle of existing control setup, utilize tooth bar 2 be hit quick travel time oil cylinder 1 in hydraulic oil oil return speed large, the feature that spill pressure is high, starting closedown resistance valves makes hydraulic oil reflux, and then reaches the object stoping tooth bar movement.Structure is simple, cost is low, be particularly suitable for the use that rack-and-gear hydraulic steering gear controls tooth bar action.
Claims (5)
1. a tooth bar control structure for rack-and-gear hydraulic steering gear, it is made up of oil cylinder (1), tooth bar (2), blanking cover (3), oil sealing (4), piston (5), left oil nozzle (6), right oil nozzle (7) and resistance valves; It is characterized in that: the oil sealing (4) arranged by symmetry shape in oil cylinder (1) and blanking cover (3) activity tooth bar (2) is housed, the tooth bar (2) between oil sealing (4) is fixed with piston (5); Oil cylinder (1) outer round surface of piston (5) both sides is fixed with respectively left oil nozzle (6) and right oil nozzle (7), in left oil nozzle (6) and right oil nozzle (7), respectively resistance valves is housed.
2. the tooth bar control structure of a kind of rack-and-gear hydraulic steering gear according to claim 1, it is characterized in that: described resistance valves is made up of valve body (8), cone-shaped spring (9), plug (10) and bottom (11): valve body (8) is the cylinder of band ladder endoporus (13), bottom (11) is equipped with in valve body (8) termination, one end, by cone-shaped spring (9), plug (10) is housed actively in the valve body (8) of bottom (11) side, plug (10) is connected with bottom (11) Intermittent Contact.
3. the tooth bar control structure of a kind of rack-and-gear hydraulic steering gear according to claim 2, is characterized in that: described plug (10) is bullet, and the bottom face of plug (10) has oil groove (12).
4. the tooth bar control structure of a kind of rack-and-gear hydraulic steering gear according to claim 2, is characterized in that: ladder endoporus (13) the step place cross-sectional plane of described valve body (8) is tapered.
5. the tooth bar control structure of a kind of rack-and-gear hydraulic steering gear according to claim 2, is characterized in that: described bottom (11) is torus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520928301.0U CN205131362U (en) | 2015-11-20 | 2015-11-20 | Rack and pinion hydrostatic steering unit's rack control structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520928301.0U CN205131362U (en) | 2015-11-20 | 2015-11-20 | Rack and pinion hydrostatic steering unit's rack control structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205131362U true CN205131362U (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520928301.0U Expired - Fee Related CN205131362U (en) | 2015-11-20 | 2015-11-20 | Rack and pinion hydrostatic steering unit's rack control structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205131362U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522110A (en) * | 2016-12-28 | 2017-03-22 | 中交路桥华南工程有限公司 | Multi-transportation pipeline switching device and multi-point balance cloth numerical control system |
-
2015
- 2015-11-20 CN CN201520928301.0U patent/CN205131362U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522110A (en) * | 2016-12-28 | 2017-03-22 | 中交路桥华南工程有限公司 | Multi-transportation pipeline switching device and multi-point balance cloth numerical control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20201120 |