CN2395946Y - Hydraulic steering booster - Google Patents
Hydraulic steering booster Download PDFInfo
- Publication number
- CN2395946Y CN2395946Y CN 99247185 CN99247185U CN2395946Y CN 2395946 Y CN2395946 Y CN 2395946Y CN 99247185 CN99247185 CN 99247185 CN 99247185 U CN99247185 U CN 99247185U CN 2395946 Y CN2395946 Y CN 2395946Y
- Authority
- CN
- China
- Prior art keywords
- oil
- oil pocket
- communicated
- return
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Abstract
The utility model relates to a hydraulic steering booster which belongs to a clutch boosting mechanism. The hydraulic steering booster mainly comprises a slide valve, a piston sleeve, and a shell. The hydraulic steering booster is provided with five oil cavities side by side. An oil entering cavity is positioned between an oil pushing cavity and an oil returning cavity, and is communicated with an oil inlet through an oil passage. The oil pushing cavity is communicated with a left oil chamber of an oil cylinder. The oil returning cavity is communicated with a right oil chamber of the oil cylinder. The oil returning cavity and the right oil chamber are respectively arranged in the oil pushing cavity. Two oil back cavities on sides of the oil returning cavity are communicated with oil back openings. A gap between the outer wall of the slide valve and the inner wall of the piston sleeve forms a pressure oil distributing passage to communicate the five oil cavities. Two steps on the slide valve are respectively positioned in the oil pushing cavity and the oil returning cavity to form a cavity gate to seal a left end opening and a right end opening.
Description
The utility model belongs to the servomechanism of power-transfer clutch, mainly proposes a kind of trac., bulldozer turns to and uses hydraulic steering booster.
Trac., the bulldozer of tractor plant's production at present all adopt the mechanical steering servo-unit, and chaufeur pulling joystick is relatively required great effort when turning to, and needs certain arm strength, and is quite big at its labour intensity of occasion operation that frequently turns to; The mechanical steering servo-unit is installed in addition, and debugging is comparatively complicated, time-consuming, the fault rate height.
The purpose that the utility model proposes hydraulic steering booster promptly is to solve the existing the problems referred to above of mechanical type steering booster, and makes it have reasonable in design, high reliability features in the use.
The technical scheme of taking that the utility model is finished its invention task is: it mainly includes guiding valve, and piston bush and shell are stopped; Be arranged side by side between piston bush and the guiding valve and advanced oil pocket, returned oil pocket and oil return oil pocket, the oil input channel of oil inlet is advancing oil pocket and is returning between the oil pocket, advance oil pocket to be communicated with grease chamber, an oil cylinder left side, return oil pocket and be communicated with by the right grease chamber of oil duct and oil cylinder by oil duct; Two oil return oil pockets are separately positioned on and advance oil pocket, return the oil pocket avris and be communicated with return opening by oil duct; The gap that has between guiding valve outer wall and piston bush inwall constitutes that pressure oil distributes passage will advance oil pocket, returns oil pocket, the oil return oil pocket is communicated with, two steps on the guiding valve lay respectively at and advance oil pocket, return in the oil pocket, constitute the chamber door of oil closed cavity left and right sides end opening.
When desiring during work piston bush is moved to right, guiding valve is moved to right, step on the guiding valve will advance oil pocket, return the sealing of oil pocket right-end openings, pressure oil enters and advances oil pocket and enter grease chamber, an oil cylinder left side by oil duct, piston bush moves to right, and the oil in the right grease chamber of oil cylinder enters by oil duct and returns oil pocket and enter the oil return oil pocket again, enter fuel tank by return opening.Make piston bush stop not apply the external force to guiding valve when mobile, guiding valve promptly moves to left under action of reset spring, and the step return is in the middle part of oil pocket, and oil inlet, return opening are communicated with the hydraulic efficiency pressure system off-load.When desiring to make piston bush to move to left, be moved to the left guiding valve, step on the guiding valve will advance oil pocket, return the left end closure of openings of oil pocket, pressure oil enters and returns oil pocket and enter the right grease chamber of oil cylinder by oil duct, piston bush moves to left, and the oil in the grease chamber, an oil cylinder left side enters by oil duct and advances oil pocket to enter the oil return oil pocket again.Enter return opening, return fuel tank.
The push rod of piston bush one end is connected by the steering clutch of pipe link with trac., bulldozer, and an end of guiding valve is connected by the steering arm of pipe link with trac., bulldozer.
The hydraulic steering booster that the utility model proposes and original mechanical type steering booster relatively have to be handled light and is easy to the characteristics installing, adjust, and actuating force is about 1/15 of a mechanical booster, and the simultaneous faults rate is lower.
Embodiment:
Accompanying drawing 1 is the utility model structural representation.
With reference to accompanying drawing its structure is further specified:
As shown in drawings, hydraulic steering booster includes guiding valve 3, piston bush 4, housing 5; Housing 5 is provided with oil inlet 6 that is communicated with oil pump and the return opening 10 that is communicated with fuel tank, be arranged side by side between piston bush 4 and the guiding valve 3 and advanced oil pocket 19, returned oil pocket 14, oil return oil pocket 22,12, be communicated with oil inlet 6 by oil duct 8 at the oil-feed oil pocket 18 that advances oil pocket 19, return between the oil pocket 14, oil-feed oil pocket 18 adjacent both sides are for advancing oil pocket 19 and returning oil pocket 14, advance the right side of oil pocket 19, the left side of returning oil pocket 14 to be respectively oil return oil pocket 22,12; Advance oil pocket 19 to be communicated with grease chamber 11, an oil cylinder left side by oil duct 7,9, returning oil pocket 14 is communicated with by the right grease chamber 24 of oil duct 16,23 and oil cylinder, oil return oil pocket 12 is communicated with return opening 10 by oil duct 13, oil return oil pocket 22 is communicated with return opening 10 by oil duct 21,17, the gap that has between the inwall of the outer wall of guiding valve 3 and piston bush 4 constitutes pressure oil and distributes passage that five oil pockets are communicated with, step 20 on the guiding valve 3 is positioned at and advances oil pocket 19, step 15 is positioned at and returns oil pocket 14, and step is positioned at the middle part of oil pocket during off working state.During guiding valve 3 sway, the step on the guiding valve will advance oil pocket, return the end sealing of oil pocket, and the other end is an open design, and the size of decision opening amount.
The right-hand member of guiding valve 3 is provided with the guiding valve Bringing-back mechanism, it is nested with retracing spring 2 between two reset seat, guiding valve 3 displacements under the external force effect, spring 2 compressions, when not having external force, spring 2 automatically resets guiding valve 3, step on the guiding valve 3 be positioned at again the middle part of corresponding oil pocket, this moment, oil inlet communicated with return opening, and the left and right grease chamber of oil cylinder communicates, the hydraulic efficiency pressure system off-load.
The push rod 1 of piston bush 4 right-hand members is connected by the steering clutch of pipe link with trac., bulldozer, and the left end of guiding valve 3 is connected by the steering arm of pipe link with trac., bulldozer.
Promote joystick guiding valve 3 is moved to right, piston bush 4 moves to right, and by pipe link steering clutch is thrown off, and the joystick of pulling back moves to left guiding valve 3, and piston bush 4 moves to left, and makes the steering clutch combination by pipe link, finishes the effect of power steering.
Claims (1)
1, a kind of hydraulic steering booster, it includes guiding valve (3), piston bush (4) and housing (5); It is characterized in that being arranged side by side propelling oil pocket (19) between piston bush (4) and the guiding valve (3), return oil pocket (14) and oil return oil pocket (22), (12), the oil input channel (8) of oil inlet (6) is positioned at propelling oil pocket (19) and returns between the oil pocket (14), advance oil pocket (19) to be communicated with oil cylinder grease chamber, a left side (11) by oil duct (9), return oil pocket (14) and be communicated with the right grease chamber of oil cylinder (24) by oil duct (16) (23), two oil return oil pockets (22) (12) are separately positioned on and advance oil pocket (19), return oil pocket (14) avris and pass through oil duct (21) (17) respectively, (13) be communicated with return opening (10); The gap that has between the outer wall of guiding valve (3) and the inwall of piston bush (4) constitutes pressure oil and distributes passage that oil pocket (12) (14) (19) (22) is communicated with, two steps (20) (15) on the guiding valve (3) correspondence respectively are positioned at propelling oil pocket (19), return oil pocket (14), constitute the chamber door of oil closed cavity left and right sides end opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99247185 CN2395946Y (en) | 1999-11-26 | 1999-11-26 | Hydraulic steering booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99247185 CN2395946Y (en) | 1999-11-26 | 1999-11-26 | Hydraulic steering booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2395946Y true CN2395946Y (en) | 2000-09-13 |
Family
ID=34032672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99247185 Expired - Fee Related CN2395946Y (en) | 1999-11-26 | 1999-11-26 | Hydraulic steering booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2395946Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451355C (en) * | 2007-01-12 | 2009-01-14 | 路文忠 | Electrohydraulic servo oil cylinder and numerical control machine tool using same |
| CN103167797A (en) * | 2010-10-11 | 2013-06-19 | 大虎株式会社 | Tractor |
-
1999
- 1999-11-26 CN CN 99247185 patent/CN2395946Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451355C (en) * | 2007-01-12 | 2009-01-14 | 路文忠 | Electrohydraulic servo oil cylinder and numerical control machine tool using same |
| CN103167797A (en) * | 2010-10-11 | 2013-06-19 | 大虎株式会社 | Tractor |
| CN103167797B (en) * | 2010-10-11 | 2016-05-04 | 大虎株式会社 | Tractor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |