CN204750279U - Compound measurement type hydrostatic steering unit - Google Patents
Compound measurement type hydrostatic steering unit Download PDFInfo
- Publication number
- CN204750279U CN204750279U CN201520431962.2U CN201520431962U CN204750279U CN 204750279 U CN204750279 U CN 204750279U CN 201520431962 U CN201520431962 U CN 201520431962U CN 204750279 U CN204750279 U CN 204750279U
- Authority
- CN
- China
- Prior art keywords
- pin wheel
- wheel set
- cycloidal pin
- cycloidal
- vice
- 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.)
- Active
Links
Landscapes
- Power Steering Mechanism (AREA)
Abstract
The utility model relates to a compound measurement type hydrostatic steering unit belongs to hydraulic pressure technical field. The valve body one end of this steering gear is equipped with valve barrel, case, wears to adorn the universal driving shaft in the case hole, and the vice stator of the valve body other end and a cycloidal -pin wheel links firmly, links firmly the other end and the vice rotor transmission meshing of a cycloidal -pin wheel of universal driving shaft again with the vice stator of the 2nd cycloidal -pin wheel, the vice rotor of a cycloidal -pin wheel is connected by short shaft coupling and the vice rotor transmission of the 2nd cycloidal -pin wheel, the vice stator of the 2nd cycloidal -pin wheel is connected with the switching -over valve, when the oil inlet was in high pressure and decompression, a cycloidal -pin wheel is vice to be fed through and the separation state with the 2nd cycloidal -pin wheel is vice the switching -over valve at making respectively. The utility model discloses an ingenious manual steering difficult problem of having solved big discharge capacity hydrostatic steering unit.
Description
Technical field
The utility model relates to a kind of hydraulic steering gear, and especially a kind of compound metering type hydraulic steering gear, belongs to technical field of hydraulic pressure.
Background technology
All-hydraulic steering gear is a kind of Hydraulic Elements be generally used on engineering truck, field machine etc., mainly comprise valve core housing, turn the parts such as stator Meshing Pair, valve body, its typical structure can be the Chinese patent application document of 201110195256.9,201320401810.9 see application number.
In prior art, under engineering truck main frame misfiring condition, often need to carry out execution by manual steering.But during practical operation, only have the deflector of small displacement to realize manual steering.Because for the deflector of huge discharge, manpower can not overcome mechanism's resistance, cannot realize turning to.Therefore, because huge discharge main frame can not manual steering, not only operate inconvenience, but also there is certain potential safety hazard.
Utility model content
The purpose of this utility model is: for above-mentioned prior art Problems existing, by structural development, proposes a kind of compound metering type hydraulic steering gear that also can realize manual steering when huge discharge.
In order to reach above object, compound metering type hydraulic steering gear of the present utility model comprises the valve body (1) with oil inlet (P) and oil outlet (T), described valve body one end is shaped with in the endoporus of runner is equipped with valve pocket (2), described valve pocket (2) is built with extending the spool (2-1) turning to input end, one end forms axial constraint universal driving shaft (10) by radial peg (2-2) and described valve pocket (2) is installed in the endoporus of described spool (2-1), it is characterized in that: described valve body (1) other end by first after stator of dish (6) and the first cycloidal pin wheel set (3) is connected, be connected every the stator of dish (7) with the second cycloidal pin wheel set (4) by second again, the other end of described universal driving shaft (10) engages with the rotor transmission of described first cycloidal pin wheel set (3) every the centre hole coiling (6) through first, the rotor of described first cycloidal pin wheel set (3) is in transmission connection with the rotor of the second cycloidal pin wheel set (4) every the dish short shaft coupling (11) of (7) by through second, the stator of described second cycloidal pin wheel set (4) is connected with the change-over valve (5) by oil inlet oil pressure cntrol every dish (8) by the 3rd, when described oil inlet is in high pressure, described change-over valve is in and makes the first cycloidal pin wheel set (3) and the second cycloidal pin wheel set (4) connected state, when described oil inlet is in decompression, described change-over valve is in the state of one of closedown first cycloidal pin wheel set (3) and the second cycloidal pin wheel set (4).
Like this, when engineering truck main frame is in operating state, oil pump oil supply is to the oil inlet of deflector, and then controlled by change-over valve, make first, second cycloidal pin wheel set connection work, the discharge capacity of deflector is two cycloidal pin wheel set discharge capacity sums, realizes the power steering of huge discharge.When engineering truck main frame stops working, oil inlet does not have pressure oil, change-over valve makes the first and second cycloidal pin wheel sets disconnect, when now manpower carries out steering operation, hydraulic oil only enters the first cycloidal pin wheel set of contiguous input end, its discharge capacity and small displacement engineering truck are suitable, and therefore manpower can overcome resistance completely, thus realize Manpower operating and turn to.
As can be seen here, the utility model is by organically combining the first and second cycloidal pin wheel sets, and the change of Appropriate application oil inlet oil pressure controls the mode of operation of two cycloidal pin wheel sets by change-over valve, thus the ingenious manual steering difficult problem solving huge discharge hydraulic steering gear.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the hydraulic schematic diagram of Fig. 1 embodiment.
Detailed description of the invention
Compound metering type hydraulic steering gear of the present utility model as shown in Figure 1 and Figure 2, valve body 1 one end with oil inlet P and oil outlet T is shaped with in the endoporus of runner is equipped with valve pocket 2, this valve pocket 2 is built with extending the spool 2-1 turning to input end, one end forms axial constraint universal driving shaft 10 by radial peg 2-2 and valve pocket 2 is installed in the endoporus of this spool 2-1, valve body 1 other end, then to be connected every the stator of dish 7 and the second cycloidal pin wheel set 4 by second by first after the stator of dish 6 and the first cycloidal pin wheel set 3 is connected.The other end of universal driving shaft 10 is engaged with the female splines transmission of the first cycloidal pin wheel set 3 rotor by the male splines of its cylindrical every the centre hole of dish 6 through first.The rotor of the first cycloidal pin wheel set 3 is in transmission connection every the short shaft coupling 11 of dish 7 and the rotor of the second cycloidal pin wheel set 4 by through second, and short shaft coupling 11 two ends have male splines, engage respectively with the female splines of the first cycloidal pin wheel set 3 and the second cycloidal pin wheel set 4 rotor.The discharge capacity of the first cycloidal pin wheel set 3 is less than the second cycloidal pin wheel set 4.The stator of the second cycloidal pin wheel set 4 is fixedly connected with every the valve body of dish 8 with the change-over valve 5 by oil inlet oil pressure cntrol by the 3rd.A, B mouth in Fig. 2 be connected with steering cylinder turn to hydraulic fluid port.
This valve body one end is connected bonnet 9, the spool 12 be enclosed within pull back spring 12-1 is equipped with in inside, therefore there is the primary importance under hydraulic action and the second place under the action of the spring, this two positions coordinate respectively Fig. 2 be shown in runner in deflector and arrange, can realize, during work, oil pump oil supply is to oil inlet P, namely this mouth leads to pressure oil and is in high pressure, now change-over valve 5 is under pressure oil effect, overcome acting force of the spring, be in and make the first cycloidal pin wheel set 3 and the second cycloidal pin wheel set 4 connected state, two cycloidal pin wheel sets work simultaneously, thus make the deflector discharge capacity of the present embodiment by two cycloidal pin wheel set discharge capacity superposition calculations, as the deflector of same huge discharge, achieve and be applied in super large discharge power steering required on large engineering vehicle.And after stopping working, when needing human control to turn to, oil inlet P is without pressure oil, change-over valve 5 return under the action of the spring, close the first cycloidal pin wheel set 3 and be communicated with runner with the second cycloidal pin wheel set 4, the present embodiment makes wherein the second cycloidal pin wheel set 4 be closed, and now deflector is only equivalent to the small displacement with the first cycloidal pin wheel set 3, therefore completely can manual steering operation.During manual steering (see Fig. 2), hydraulic oil from fuel tank to T mouth, then enters valve core housing, now between 3,4, intercepts access failure, and because the discharge capacity of 3 is less, manpower completely can rotating operation.
As can be seen here, the change of the present embodiment Appropriate application oil inlet oil pressure, arranges deciliter mode of operation of control two cycloidal pin wheel set by change-over valve and rational runner, thus the ingenious manual steering difficult problem solving huge discharge hydraulic steering gear.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of this patent.
Claims (2)
1. a compound metering type hydraulic steering gear, comprise the valve body (1) with oil inlet (P) and oil outlet (T), described valve body one end is shaped with in the endoporus of runner is equipped with valve pocket (2), described valve pocket (2) is built with extending the spool (2-1) turning to input end, one end forms axial constraint universal driving shaft (10) by radial peg (2-2) and described valve pocket (2) is installed in the endoporus of described spool (2-1), it is characterized in that: described valve body (1) other end by first after stator of dish (6) and the first cycloidal pin wheel set (3) is connected, be connected every the stator of dish (7) with the second cycloidal pin wheel set (4) by second again, the other end of described universal driving shaft (10) engages with the rotor transmission of described first cycloidal pin wheel set (3) every the centre hole coiling (6) through first, the rotor of described first cycloidal pin wheel set (3) is in transmission connection with the rotor of the second cycloidal pin wheel set (4) every the dish short shaft coupling (11) of (7) by through second, the stator of described second cycloidal pin wheel set (4) is connected with the change-over valve (5) by oil inlet oil pressure cntrol every dish (8) by the 3rd, when described oil inlet is in high pressure, described change-over valve is in and makes the first cycloidal pin wheel set (3) and the second cycloidal pin wheel set (4) connected state, when described oil inlet is in decompression, described change-over valve is in one of closedown first cycloidal pin wheel set (3) and the second cycloidal pin wheel set (4) state.
2. compound metering type hydraulic steering gear according to claim 1, is characterized in that: the valve body of described change-over valve is built with the spool be enclosed within pull back spring, and described spool has the primary importance under hydraulic action and the second place under the action of the spring.
3. compound metering type hydraulic steering gear according to claim 2, is characterized in that: the discharge capacity of described first cycloidal pin wheel set is less than the second cycloidal pin wheel set.
4. compound metering type hydraulic steering gear according to claim 3, is characterized in that: described universal driving shaft is engaged with the female splines transmission of the first cycloidal pin wheel set rotor by the male splines of its cylindrical.
5. compound metering type hydraulic steering gear according to claim 4, is characterized in that: described short shaft coupling two ends have male splines, engages respectively with the female splines of the first cycloidal pin wheel set and the second cycloidal pin wheel set rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520431962.2U CN204750279U (en) | 2015-06-23 | 2015-06-23 | Compound measurement type hydrostatic steering unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520431962.2U CN204750279U (en) | 2015-06-23 | 2015-06-23 | Compound measurement type hydrostatic steering unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204750279U true CN204750279U (en) | 2015-11-11 |
Family
ID=54465017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520431962.2U Active CN204750279U (en) | 2015-06-23 | 2015-06-23 | Compound measurement type hydrostatic steering unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204750279U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314532A (en) * | 2015-06-23 | 2017-01-11 | 镇江液压股份有限公司 | Composite metering type hydraulic steering unit |
-
2015
- 2015-06-23 CN CN201520431962.2U patent/CN204750279U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314532A (en) * | 2015-06-23 | 2017-01-11 | 镇江液压股份有限公司 | Composite metering type hydraulic steering unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204750279U (en) | Compound measurement type hydrostatic steering unit | |
| CN107472358B (en) | Emergency steering hydraulic system of wheel loader | |
| CN205745460U (en) | Hydraulic bidirectional check valve assembly for steering wheel | |
| CN205273602U (en) | Articulated formula tipper emergency steering system | |
| CN111976830A (en) | Preferentially steering double-loop braking quantitative open system for mining vehicle | |
| CN201891142U (en) | Improved structure of hydraulic system of loader | |
| CN102092655B (en) | Power-driven hydraulic jack provided with load power-off protective device | |
| CN203581087U (en) | Hydraulic steering gear with straight hole as signal hole | |
| CN104613041B (en) | Variable cycloid hydraulic motor | |
| CN106314532A (en) | Composite metering type hydraulic steering unit | |
| CN204077783U (en) | A kind of middle low power tractor dynamic power steering swivel system | |
| CN203214462U (en) | Mixing truck and hydraulic system thereof | |
| CN203496983U (en) | Emergency steering apparatus of grader | |
| CN103047131A (en) | Double braking and steering pump | |
| CN202215806U (en) | One-piece large differential pressure bidirectional safety valve used for automobile hydraulic power assisted steering device | |
| CN201971591U (en) | Overload protection electrohydraulic jack for vehicles | |
| CN204035690U (en) | A kind of interference bolts assemblies Pneumatic mechanical type puller system | |
| CN203796649U (en) | Hydraulic cable winding device of electric scraper | |
| CN203186408U (en) | 4/5 tooth load sensing steering gear | |
| CN204082731U (en) | Concrete mixer duplex gear pump open type hydraulic system | |
| CN203510153U (en) | Device for relieving booting load of impulse pneumatic tool | |
| CN203098272U (en) | Double brake and steering pump | |
| CN108583680B (en) | Independent steering system of full hydraulic forklift | |
| CN202381669U (en) | Cooling device for pre-pressing speed reducing machine | |
| CN201747687U (en) | Three-way valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |