CN207292120U - Steering hydraulic system - Google Patents
Steering hydraulic system Download PDFInfo
- Publication number
- CN207292120U CN207292120U CN201721251932.9U CN201721251932U CN207292120U CN 207292120 U CN207292120 U CN 207292120U CN 201721251932 U CN201721251932 U CN 201721251932U CN 207292120 U CN207292120 U CN 207292120U
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- China
- Prior art keywords
- steering
- hole
- spool
- piston
- rodless cavity
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Abstract
It the utility model is related to steering hydraulic system, to solve the problems, such as that two hydraulic cylinders are difficult to synchronous in existing steering hydraulic system, the utility model constructs a kind of steering hydraulic system, including two steering cylinders, steering gear, the hydraulic pump to steering gear fuel feeding, the rodless cavity of two steering cylinders is interconnected by pipeline, and the rod chamber of two steering cylinders is connected each via pipeline with the corresponding hydraulic fluid port of steering gear；The through hole of axial connection rodless cavity and rod chamber is provided with the piston of each oil cylinder, spring and two spools are provided with through hole towards the check valve turned in the middle part of through hole during the movement of direction, spool inner end of the both ends of spring respectively with two check valves is connected, the spool outer end of two check valves corresponds to the end face at prominent piston both ends, when piston is moved to both ends extreme position in cylinder barrel, one in the spool of two check valves accordingly with guide sleeve or end cap contact action.The steering can make two steering cylinders keep synchronous to the automatic repairing of steering cylinder rodless cavity.
Description
Technical field
A kind of hydraulic system is the utility model is related to, more specifically to a kind of steering hydraulic system.
Background technology
In the steering of walking machine, two identical steering cylinders use at the same time, are relied on for two steering cylinders
The mechanical structures such as mechanical linkage are controlled in the steering mechanism of two wheels, and the steering of the leakage rate of oil cylinder to wheel will not synchronously cause
Influencing, but two wheels are controlled respectively for two steering cylinders, steering synchronously fully relies on the Synchronous motion control of oil cylinder,
And in the steering mechanism of the big chamber connection of two steering cylinders, the internal leakage of oil cylinder is synchronized with the movement influence very to steering
Greatly.Due to the big chamber connection of two steering cylinders, after the big chamber of oil cylinder is filled fluid in final assembly, mechanical normal direction of rotation process
In big chamber no longer pass in and out fluid.As usage time increases, big chamber fluid fluid caused by internal leakage is reduced, two cylinder movements
Will be asynchronous, it is asynchronous in turn result in steered wheel.
Utility model content
The technical problems to be solved in the utility model be in existing steering hydraulic system two hydraulic cylinders be difficult to it is synchronous
Problem, and the hydraulic steering system that a kind of two oil cylinder keeps synchronous is provided.
The utility model is to realize that the technical solution of its purpose is such：Construct a kind of steering hydraulic system, including two
A steering cylinder, steering gear, the hydraulic pump to steering gear fuel feeding, the steering cylinder include cylinder barrel and cylinder barrel are separated into no bar
The piston of chamber and rod chamber, is end cap and guide sleeve at the both ends of cylinder barrel；The rodless cavity of described two steering cylinders passes through pipeline
It is interconnected, the rod chamber of two steering cylinders is connected each via pipeline with the corresponding hydraulic fluid port of steering gear；It is it is characterized in that every
The through hole of axial connection rodless cavity and rod chamber is provided with the piston of a oil cylinder, spring and two valves are provided with the through hole
Towards the check valve turned on during the movement of direction in the middle part of through hole, the spool inner end of the both ends of the spring respectively with two check valves connects core
Connect, the spool outer end of two check valves corresponds to the end face at prominent piston both ends, and the piston is moved to the both ends limit in cylinder barrel
During position, one in the spool of two check valves accordingly with the guide sleeve or end cap contact action.
In above-mentioned steering hydraulic system, the inner wall of described through hole one end is formed with a wherein spool is located at the through hole end
Check valve；The other end of the through hole is equipped with valve seat, and another spool is formed with the valve seat is located at the through hole end
Check valve.The through hole is circular hole, and the guide section of the spool is in prism-shaped.
The utility model compared with prior art, has piston repairing structure type simple, connection and reasonable arrangement, dismounting is not required to
Can directly it be assembled by hand by specific purpose tool, when hydraulic cylinder repairing is broken down, it is not necessary to change piston rod and work
Plug, directly replaces spool and valve seat, of low cost, and except repairing function also has the function of bidirectional buffering, improves
The advantages that service life of hydraulic cylinder.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model hydraulic steering system.
Fig. 2 is the structure diagram of the middle steering cylinder of the utility model hydraulic steering system.
Fig. 3 is the structure diagram of the middle piston of the utility model hydraulic steering system.
Fig. 4 is the structure diagram of the middle valve seat of the utility model hydraulic steering system.
Fig. 5 is the structure diagram of the first spool in the utility model hydraulic steering system.
Fig. 6 is the structure diagram of the second spool in the utility model hydraulic steering system.
Embodiment
Illustrate specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the steering hydraulic system in the present embodiment, including hydraulic pump 1, pressure-gradient control valve 2, steering gear 3 and two
Steering cylinder 4.Hydraulic pump 1 draw oil and is delivered to steering gear 3 from hydraulic oil container by pressure-gradient control valve 2, passes through steering gear 3
To 4 fuel feeding of steering cylinder.Each steering cylinder 4 includes cylinder barrel 41 and cylinder barrel is separated into the piston 46 of rodless cavity and rod chamber,
It is end cap 42 and guide sleeve 43 at the both ends of cylinder barrel；The rodless cavity of two steering cylinders is interconnected by pipeline 44, and two turn
Connected to the rod chamber 45 of oil cylinder each via pipeline with the corresponding hydraulic fluid port of steering gear 3.
As shown in Fig. 2 Fig. 3, the through hole 461 of axial connection rodless cavity and rod chamber is provided with the piston 46 of each oil cylinder,
Spring 54 and two spools are provided with through hole towards the check valve turned in the middle part of through hole during the movement of direction, the both ends difference of spring 54
It is connected with the spool inner end of two check valves.
Through hole 461 is right end close to one end of rod chamber on piston 46, and the spool in the right end of through hole is right spool 53,
As shown in figure 5, the side wall of right spool 53 and through hole 46 forms the check valve on right side, the right end of right spool 53 is the structure of right spool
In prism-shaped guide section, stretched out from the right end of through hole 46, when piston 46 is moved to the end of rod chamber 45, right spool 53
End is contacted with guide sleeve 43, and right 53 opposing pistons 46 of spool are moved to the left, and the check valve on the right side of this opens conducting.
Through hole is left end close to one end of rodless cavity 44 on piston 46, and valve seat 51 is equipped with the left end of through hole 461, valve seat
Structure as shown in figure 4, the spool in valve seat 51 is left spool 52, the structure of left spool 52 as shown in fig. 6, left spool 52 with
Valve seat 51 forms the check valve in left side, and it is in prism-shaped guide section that the left end of left spool 52, which is, and guide section is stretched from the right end of valve seat
Go out, when piston is moved to the end of rodless cavity, the end of left spool is contacted with end cap, and left spool opposing pistons move right,
Check valve on the left of this opens conducting.
In the present embodiment, when machine does not turn to, piston is located at the middle part of cylinder barrel, when being turned to, steering gear to its
In an oil cylinder (the first steering cylinder) rod chamber in it is oil-filled, the piston of the oil cylinder is moved to the direction of rodless cavity, rodless cavity
Interior hydraulic oil is flowed into the rodless cavity of another steering cylinder (the second steering cylinder) by pipeline and promotes the steering
The piston of oil cylinder is moved to rod chamber.When the first steering cylinder is moved to end, left spool and end in the first steering cylinder
Lid contacts, the left side check valve on open-top piston, and the check valve on right side is due to the pressure of hydraulic oil in rod chamber on the piston
Effect, is opened all the time, therefore two on the piston in the first steering cylinder check valve turns on the rod chamber of the first steering cylinder
And rodless cavity, the hydraulic oil in rodless cavity enter rodless cavity by piston, the second steering cylinder are being entered by pipeline
Rodless cavity, promotes the piston of the second steering cylinder to continue to move to, until right one-way valve on the second steering cylinder piston and guiding
Set contact conducting.So as to complete the repairing to the big chamber of steering cylinder, the synchronization telescope of first, second steering cylinder is realized.Work as liquid
Pressure oil from the rod chamber of the second steering cylinder into fashionable, its oil replenishing process enter with the rod chamber from the first steering cylinder it is identical,
Also the repairing to the big chamber of steering cylinder can be completed.
Claims (3)
1. a kind of steering hydraulic system, including two steering cylinders, steering gear, the hydraulic pump to steering gear fuel feeding, the steering
Oil cylinder includes cylinder barrel and cylinder barrel is separated into the piston of rodless cavity and rod chamber, is end cap and guide sleeve at the both ends of cylinder barrel；Institute
The rodless cavity for stating two steering cylinders is interconnected by pipeline, and the rod chamber of two steering cylinders is each via pipeline and steering
The correspondence hydraulic fluid port connection of device；It is characterized in that the logical of axial connection rodless cavity and rod chamber is provided with the piston of each oil cylinder
Hole, spring and two spools are provided with the through hole towards the check valve turned in the middle part of through hole during the movement of direction, the spring
Spool inner end of the both ends respectively with two check valves is connected, and the spool outer end of two check valves corresponds to the end at prominent piston both ends
Face, when the piston is moved to both ends extreme position in cylinder barrel, one in the spool of two check valves is accordingly led with described
To set or end cap contact action.
2. steering hydraulic system according to claim 1, it is characterised in that the inner wall of described through hole one end and a wherein valve
Core forms the check valve positioned at the through hole end；The other end of the through hole is equipped with valve seat, another spool and the valve
Seat forms the check valve positioned at the through hole end.
3. steering hydraulic system according to claim 1 or 2, it is characterised in that the through hole is circular hole, the spool
Guide section is in prism-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721251932.9U CN207292120U (en) | 2017-09-27 | 2017-09-27 | Steering hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721251932.9U CN207292120U (en) | 2017-09-27 | 2017-09-27 | Steering hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207292120U true CN207292120U (en) | 2018-05-01 |
Family
ID=62440865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721251932.9U Active CN207292120U (en) | 2017-09-27 | 2017-09-27 | Steering hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207292120U (en) |
-
2017
- 2017-09-27 CN CN201721251932.9U patent/CN207292120U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230310 Address after: 545000 No. 6, Yangtai Road, Yanghe industrial new area, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Zhongyuan Machinery Co.,Ltd. Patentee after: GUANGXI LIUGONG MACHINERY Co.,Ltd. Address before: 545006 1 ho Cheung Road, Yufeng District, Liuzhou, the Guangxi Zhuang Autonomous Region (Yanghe industrial new area) Patentee before: LIUZHOU LIUGONG HYDRAULIC COMPONENTS Co.,Ltd. Patentee before: GUANGXI LIUGONG MACHINERY Co.,Ltd. |
|
| TR01 | Transfer of patent right |