CN106402068A - Hydraulic valve - Google Patents
Hydraulic valve Download PDFInfo
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- CN106402068A CN106402068A CN201510457912.6A CN201510457912A CN106402068A CN 106402068 A CN106402068 A CN 106402068A CN 201510457912 A CN201510457912 A CN 201510457912A CN 106402068 A CN106402068 A CN 106402068A
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Abstract
The invention provides a hydraulic valve which comprises a valve body and a valve core, wherein the valve body is provided with a valve cavity, a first oil port and a second oil port; the first oil port and the second oil port communicate with the valve cavity; a channel is formed inside the valve core; and the valve core is movably arranged in the valve cavity, so that the first oil port and the second oil port can be selectively connected or disconnected through the channel. By adoption of the hydraulic valve provided by the invention, the impact of oil pressure on the valve body can be reduced, and the sensitivity of the flow rate of the hydraulic valve to the moving distance of the valve core can be lowered.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, particularly to a kind of hydraulic valve.
Background technology
, throughout machinery industry, its execution is stable, technology maturation for hydraulic system.One hydraulic system is generally by energy source element (hydraulic pressure
Pump), executive component (hydraulic cylinder, hydraulic motor), control element (various hydraulic valve) and auxiliary element (fuel tank and pipeline etc.)
Four class Hydraulic Elements are formed.Hydraulic valve is the control element in hydraulic system, and its function is to control the stream of liquid in hydraulic system
To, pressure and flow.The basic structure of hydraulic valve mainly includes valve element, valve body and drives valve element to perform relative motion in valve body
Operating control mechanism.
The at present most of structure for link-type of valve body structure, the on-off control of valve body and being required to by the uninterrupted of valve body
The accuracy of the axial movement distance of valve element is higher, and easily forms oil shock in hydraulic valve on-off moment, causes total system
Oil pressure unstable, easily produce higher fault rate, there is room for improvement.
Content of the invention
In view of this, it is contemplated that proposing a kind of hydraulic valve, required with the mobile accuracy reducing valve element.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that：
A kind of hydraulic valve, including：Valve body, described valve body has valve pocket and the first hydraulic fluid port connecting with described valve pocket and the second oil
Mouthful；Valve element, the inside of described valve element is provided with passage, and described valve element is movably arranged in described valve pocket so that described first is oily
Mouth is connected with described second hydraulic fluid port or disconnects with passing through described channel selectivity.
Further, described passage includes：First passage, described valve element moves in described valve pocket so that described first passage
First opening is selectively communicated with described first hydraulic fluid port or disconnects；And second channel, the first of described second channel with described
Second opening of first passage is connected, and second mouthful of described second channel is connected with described second hydraulic fluid port.
Further, described hydraulic valve also includes：Block assembly, described block that assembly is connected to described second channel first
Optionally to be disconnected or described in connecting according to the oil pressure in described first passage mouthful and the second opening of described first passage between
First passage and described second channel.
Further, described valve element includes：First valve element, is provided with mounting groove in described first valve element, described first passage is located at
In described first valve element；Second valve element, described second valve element is interference fitted in described mounting groove and the diapire with described mounting groove
It is spaced apart, described second channel is located in described second valve element.
Further, the described assembly that blocks is located between the end face of described second valve element and the diapire of described mounting groove and includes：Bullet
Property part, one end elasticity of described elastic component only supports the side wall of described mounting groove；Steel ball, described steel ball is located at described first passage
At second opening, and described steel ball is connected with the other end of described elastic component with the elastic force of described elastic component and described oil pressure
Collective effect under selectively turn on or close the second opening of described first passage.
Further, the axis of described first passage is vertical with the axis of described second channel, and the axis of described second channel with
The moving direction of described valve element is parallel.
Further, second mouthful of described second channel is located at one end away from described first valve element of described second valve element.
Further, a diameter of D1 of described first hydraulic fluid port, a diameter of D3 of described first passage, and meet：1/10≤D3/D1
≤1/3.
Further, described valve body is provided with groove, and described first hydraulic fluid port is connected with described valve pocket by described groove, described valve
Core moves in described valve pocket so that described first opening is selectively communicated with described groove or disconnects, and the diameter of described groove
For D4, D4 ＞ D1.
Further, described hydraulic valve also includes：Dynamic clamping head and quiet clamping head, described valve body includes Part I and Part II, institute
State Part II and be connected with described Part I to limit described valve pocket, described first hydraulic fluid port and described second hydraulic fluid port are each provided at institute
State on Part I, described dynamic clamping head and quiet clamping head elasticity be only against one end away from described second valve element of described first valve element with described
Between Part II.
With respect to prior art, hydraulic valve of the present invention has the advantage that：
(1) hydraulic valve of the present invention, connects the first hydraulic fluid port and the second hydraulic fluid port by arranging passage in valve core inside, gets rid of
Abandon the structure that original first hydraulic fluid port is connected by valve pocket with the second hydraulic fluid port, the impact to valve body for the oil pressure can have been weakened, and reduced
The sensitivity to valve element displacement for the flow of hydraulic valve.
(2) hydraulic valve of the present invention, can filter the low pressure fluctuation of oil pressure, prevent liquid by arranging elastic component and steel ball
Force feed reverse backflow.
Brief description
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, the illustrative examples of the present invention and
It illustrates, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the hydraulic valve described in the embodiment of the present invention；
Fig. 2 is the partial enlarged drawing at A in Fig. 1.
Description of reference numerals：
100- hydraulic valve, 110- valve body, 111- first hydraulic fluid port, 112- second hydraulic fluid port, 113- valve pocket, 114- groove, 115- first
Part, 120- valve element, 121- first valve element, 1211- mounting groove, 122- second valve element, 130- passage, 131- first passage,
First opening of 1311- first passage, the second opening of 1312- first passage, 132- second channel, the of 1321- second channel
Flatly, second mouthful of 1322- second channel, 140- blocks assembly, 141- elastic component, 142- steel ball, 150- dynamic clamping head and quiet clamping head,
The diameter of D1- first hydraulic fluid port, the diameter of D3- first passage, the diameter of D4- groove.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined.
To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As Figure 1-Figure 2, hydraulic valve 100 includes valve body 110 and valve element 120.Wherein, valve body 110 limits valve pocket 113,
Alternatively, valve body 110 can include Part I 115 and Part II (accompanying drawing is not shown), and Part II can be with first
Part 115 is connected to limit valve pocket 113.
Valve body 110 is provided with the first hydraulic fluid port 111 and the second hydraulic fluid port 112, and the first hydraulic fluid port 111 and the equal and valve of the second hydraulic fluid port 112
Chamber 113 connects.Alternatively, as shown in figure 1, the first hydraulic fluid port 111 and the second hydraulic fluid port 112 can be each provided at the of valve body 110
In a part 115.The inside of valve element 120 is provided with passage 130, and valve element 120 is movably arranged in valve pocket 113 so that the
One hydraulic fluid port 111 is selectively communicated with by passage 130 with the second hydraulic fluid port 112 or disconnects.
It is understood that due to be provided with valve element 120 in valve pocket 113 so that the first hydraulic fluid port 111 and the second hydraulic fluid port 112 not
Can be connected by valve pocket 113, mobile valve element 120, the first hydraulic fluid port 111 and the second hydraulic fluid port 112 can be made by being located at valve element 120
Internal passage 130 selectively communicates with according to the shift position of valve element 120 or disconnects.
Hydraulic valve 100 according to embodiments of the present invention, connects the first hydraulic fluid port 111 by setting passage 130 inside valve element 120
With the second hydraulic fluid port 112, abandon the structure that original first hydraulic fluid port 111 is connected by valve pocket 113 with the second hydraulic fluid port 112, can
To weaken the impact to valve body 110 for the oil pressure, and the sensitivity to valve element 120 displacement for the flow of reduction hydraulic valve 100, by
This, the production difficulty of hydraulic valve 100 and production cost are minimized.
Alternatively, the first hydraulic fluid port 111 can be the oil-in of hydraulic valve 100, and the second hydraulic fluid port 112 can be hydraulic valve 100
Oil-out, in other words, when mobile valve element 120 makes the first hydraulic fluid port 111 connect by passage 130 with the second hydraulic fluid port 112, liquid
Force feed can enter hydraulic valve 100 from the first hydraulic fluid port 111, and hydraulic oil can be by the passage 130 in valve element 120 again from second
Hydraulic fluid port 112 flows out hydraulic valve 100.
In some preferred embodiments of the present invention, as Figure 1-Figure 2, passage 130 can include first passage 131 He
Second channel 132, first passage 131 can have the first opening 1311 and the second opening 1312, and second channel 132 is permissible
There is first 1321 and second mouthful 1322.Wherein, second mouthful 1322 of second channel 132 is connected with the second hydraulic fluid port 112,
The first 1321 of second channel 132 is connected with the second opening 1312 of first passage 131, and valve element 120 is in valve pocket 113
Move so that the first opening 1311 of first passage 131 is selectively communicated with the first hydraulic fluid port 111 or disconnects.
It is understood that mobile valve element 120 makes the first opening 1311 of first passage 131 connect with the first hydraulic fluid port 111,
Such first hydraulic fluid port 111 can be connected with second channel 132 and then with the second hydraulic fluid port 112 by first passage 131, in other words,
Hydraulic valve 100 can be opened；Mobile valve element 120 makes the first opening 1311 of first passage 131 and the first hydraulic fluid port 111 disconnect,
The first hydraulic fluid port 111 and the connection of the second hydraulic fluid port 112 can be disconnected, in other words, you can close hydraulic valve 100.
Preferably, as depicted in figs. 1 and 2, valve element 120 can include the first valve element 121 and the second valve element 122.Wherein,
Mounting groove 1211 can be provided with, the second valve element 122 can be interference fitted in mounting groove 1211 in first valve element 121, and the
Two valve elements 122 can be spaced apart with the diapire of mounting groove 1211, and first passage 131 can be located in the first valve element 121, the
Two passages 132 can be located in the second valve element 122.
It is understood that first passage 131 can be all connected with mounting groove 1211 with second channel 132, the first valve element 121
Hydraulic valve 100 draining can be prevented with the interference fit of the second valve element 122, respectively in the first valve element 121 and the second valve element 122
Inside process first passage 131 and second channel 132 can reduce the difficulty of processing of passage 130.
In a specific example of the present invention, hydraulic valve 100 can also include dynamic clamping head and quiet clamping head 150, dynamic clamping head and quiet clamping head 150
Can elasticity only be against between one end away from the second valve element 122 of the first valve element 121 and Part II.Dynamic clamping head and quiet clamping head 150
Can be to the mobile generation elastic reset power of the first valve element 121.Alternatively, dynamic clamping head and quiet clamping head 150 can be spring.
As shown in figure 1, the axis of first passage 131 can be vertical with the axis of second channel 132, and second channel 132
Axis can be parallel with the moving direction of valve element 120.In other words, the axis of first passage 131 can be with the movement of valve element 120
Direction is vertical, and the first opening 1311 of first passage 131 can be towards the wall of the valve body 110 at the first hydraulic fluid port 111 place.
Alternatively, the axis of first passage 131 can be vertical with the axis of the first valve element 121, and the axis of second channel 132 can
With the dead in line with the second valve element 122.
Further, as shown in figure 1, can be located at for the second of second channel 132 mouthful 1,322 second valve element 122 away from
One end of one valve element 121, in other words, second mouthful 1322 of second channel 132 of direction can be with the mobile side of valve element 120
To consistent and be directed away from the first valve element 121 direction and open wide.
It is understood that in the case that the input pressure of the first hydraulic fluid port 111 increases suddenly, hydraulic oil is from second channel 132
Second mouthful of 1322 ejection, so that valve element 120 is moved towards near the direction of dynamic clamping head and quiet clamping head 150, dynamic clamping head and quiet clamping head 150 is permissible
There is provided elastic reset power so that valve element 120 resets.Thus, the work of hydraulic valve 100 is more stable.
The area of the cross section of the first hydraulic fluid port 111 can be less than the area of the cross section of first passage 131, the first hydraulic fluid port 111 with
The cross section of first passage 131 can be various shapes, such as rectangle, circle etc..Logical with the first hydraulic fluid port 111 and first below
The cross section in road 131 is further described for as a example circle.
Alternatively, as Figure 1-Figure 2, a diameter of D1 of the first hydraulic fluid port 111, a diameter of D3, D1 of first passage 131
Following relation can be met with D3：1/10≤D3/D1≤1/3.
The effect of partial throttling valve it is understood that the diameter of first passage 131 is less, can be played by this hydraulic valve 100,
Reach the effect of voltage stabilizing.
Further, as shown in figure 1, can be provided with groove 114 on valve body 110, the first hydraulic fluid port 111 can pass through groove 114
Connect with valve pocket 113, valve element 120 move in valve pocket 113 so that first passage 131 and groove 114 selectively communicate with or
Disconnect.The area of the cross section of groove 114 can be more than the area of the cross section of the first hydraulic fluid port 111, the cross section of groove 114
Can be various shapes, such as rectangle, circle etc..So that the cross section of groove 114 is as circle as a example it is further described below.
A diameter of D4 of groove 114, D1 and D4 can meet following relation：D4 ＞ D1.
In other words, mobile valve element 120 can make the first opening 1311 of first passage 131 pass through groove 114 and the first hydraulic fluid port
111 connections, because the diameter of first passage 131 is less with respect to the diameter of groove 114, move valve element in the larger context
120 and the first opening 1311 of first passage 131 within the range all connects that is to say, that hydraulic valve 100 with groove 114
Aperture there is no special accurately requirement to the displacement of valve element 120, thus also can reduce the production difficulty of hydraulic valve 100,
The work of hydraulic valve 100 is more stable, can reduce the control cost of hydraulic system.
Preferably, as depicted in figs. 1 and 2, hydraulic valve 100 can also include blocking assembly 140, blocks assembly 140 permissible
It is connected between the first 1321 of second channel 132 and the second opening 1312 of first passage 131 with according to first passage 131
Interior oil pressure optionally disconnects or connects first passage 131 and second channel 132.
It is understood that block assembly 140 and can optionally being disconnected according to the oil pressure in first passage 131 or connect first
Passage 131 and second channel 132, for example, when the oil pressure in first passage 131 is less than default threshold value, block assembly 140
First passage 131 and second channel 132 can be disconnected, when the oil pressure in first passage 131 reaches default threshold value, block
Assembly 140 can connect first passage 131 and second channel 132.
Specifically, as shown in Fig. 1 Fig. 2, block end face and the mounting groove 1211 that assembly 140 may be located at the second valve element 122
Diapire between, block assembly 140 and can include elastic component 141 and steel ball 142, alternatively, elastic component 141 can be bullet
Spring.The side wall supporting mounting groove 1211 elasticity can be stopped in one end of elastic component 141, and steel ball 142 can be located at first passage 131
The second opening 1312 at, and steel ball 142 can be connected with the other end of elastic component 141 with the elastic force in elastic component 141
And under the collective effect of oil pressure, selectively turn on or close the second opening 1312 of first passage 131.
It is understood that elastic component 141 and steel ball 142 can be each provided in the mounting groove 1211 of the first valve element 121, and
Elastic component 141 can be folded between steel ball 142 and the side wall of mounting groove 1211, first passage 131 oil pressure to steel ball
When 142 active force is higher than the elastic force of elastic component 141, elastic component 141 is retracted towards the direction away from steel ball 142, and first leads to
Second opening 1312 in road 131 is opened, and first passage 131 is connected with second channel 132, and hydraulic oil can be from the first hydraulic fluid port
111 entrance hydraulic valves 100, hydraulic oil can be discharged from the second hydraulic fluid port 112 through after first passage 131 and second channel 132.
When the oil pressure of first passage 131 is less than the elastic force of elastic component 141 to the active force of steel ball 142, steel ball 142 is permissible
Only support the second opening 1312 of first passage 131 under the resilient force of elastic component 141, to disconnect the of first passage 131
Connection between two openings 1312 and the first 1321 of second channel 132.Thus, the oil pressure of the second hydraulic fluid port 112 is not subject to
The impact of the low pressure of one hydraulic fluid port 111, keeps the oil pressure of the second hydraulic fluid port 112, and hydraulic oil can be prevented inverse from the second hydraulic fluid port 112
To being back to the first hydraulic fluid port 111.Thus, hydraulic valve 100 can filter out the low pressure fluctuation of the force feed of the first hydraulic fluid port 111 to the
The impact of two hydraulic fluid ports 112, in other words, blocks the effect that assembly 140 can play pressure limiting valve.
In sum, hydraulic valve 100 according to embodiments of the present invention, relatively small by arranging diameter inside valve element 120
Passage 130, to connect the first hydraulic fluid port 111 and the second hydraulic fluid port 112, has abandoned original first hydraulic fluid port 111 and the second hydraulic fluid port 112
The structure being connected by valve pocket 113, can weaken the impact to valve body 110 for the oil pressure, and reduces the flow of hydraulic valve 100 to valve
The sensitivity of core 120 displacement, can filter the low pressure fluctuation of oil pressure, prevent by arranging elastic component 141 and steel ball 142
Hydraulic oil reverse backflow.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and former
Within then, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of hydraulic valve (100) is it is characterised in that include：
Valve body (110), described valve body (110) has valve pocket (113) and the first hydraulic fluid port (111) connecting with described valve pocket (113) and
Two hydraulic fluid ports (112)；
Valve element (120), the inside of described valve element (120) is provided with passage (130), and described valve element (120) is movably arranged at described valve
So that described first hydraulic fluid port (111) and described second hydraulic fluid port (112) are selectively communicated with by described passage (130) or disconnected in chamber (113)
Open.
2. hydraulic valve (100) according to claim 1 is it is characterised in that described passage (130) includes：
First passage (131), described valve element (120) is moved in described valve pocket (113) so that first the opening of described first passage (131)
Mouth (1311) is selectively communicated with described first hydraulic fluid port (111) or disconnects；With
Second opening of second channel (132), the first (1321) of described second channel (132) and described first passage (131)
(1312) it is connected, second mouthful (1322) of described second channel (132) are connected with described second hydraulic fluid port (112).
3. hydraulic valve (100) according to claim 2 is it is characterised in that also include：
Block assembly (140), described block assembly (140) be connected to the first (1321) of described second channel (132) with described
Optionally to be disconnected according to the oil pressure in described first passage (131) or to connect between second opening (1312) of first passage (131)
Logical described first passage (131) and described second channel (132).
4. hydraulic valve (100) according to claim 3 is it is characterised in that described valve element (120) includes：
First valve element (121), is provided with mounting groove (1211) in described first valve element (121), described first passage (131) is located at described
In one valve element (121)；
Second valve element (122), described second valve element (122) be interference fitted in described mounting groove (1211) and with described mounting groove (1211)
Diapire be spaced apart, described second channel (132) is located in described second valve element (122).
5. hydraulic valve (100) according to claim 4 is it is characterised in that the described assembly (140) that blocks is located at described second
Between the diapire of the end face of valve element (122) and described mounting groove (1211) and include：
Elastic component (141), one end elasticity of described elastic component (141) only supports the side wall of described mounting groove (1211)；
Steel ball (142), described steel ball (142) is located at the second opening (1312) place of described first passage (131), and described steel ball (142)
It is connected with the other end of described elastic component (141) with the elastic force of described elastic component (141) and the collective effect of described oil pressure
Selectively turn on or close second opening (1312) of described first passage (131).
6. hydraulic valve (100) according to claim 5 it is characterised in that the axis of described first passage (131) with described
The axis of second channel (132) is vertical, and the axis of described second channel (132) is parallel with the moving direction of described valve element (120).
7. hydraulic valve (100) according to claim 6 is it is characterised in that second mouthful (1322) of described second channel (132)
It is located at one end away from described first valve element (121) of described second valve element (122).
8. the hydraulic valve according to any one of claim 2-7 (100) is it is characterised in that described first hydraulic fluid port (111)
A diameter of D1, a diameter of D3 of described first passage (131), and meet：1/10≤D3/D1≤1/3.
9. hydraulic valve (100) according to claim 8 is it is characterised in that described valve body (110) is provided with groove (114),
Described first hydraulic fluid port (111) is connected with described valve pocket (113) by described groove (114), and described valve element (120) is in described valve pocket (113)
Interior movement is so that described first opening is selectively communicated with described groove (114) or disconnects, and described groove (114) is a diameter of
D4, D4 ＞ D1.
10. hydraulic valve (100) according to claim 4 is it is characterised in that also include：
Dynamic clamping head and quiet clamping head (150), described valve body (110) includes Part I (115) and Part II, described Part II with described
Part I (115) is connected to limit described valve pocket (113), and described first hydraulic fluid port (111) and described second hydraulic fluid port (112) are each provided at
On described Part I (115), described dynamic clamping head and quiet clamping head (150) elasticity be only against described first valve element (121) away from described second
Between one end of valve element (122) and described Part II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457912.6A CN106402068A (en) | 2015-07-29 | 2015-07-29 | Hydraulic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457912.6A CN106402068A (en) | 2015-07-29 | 2015-07-29 | Hydraulic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106402068A true CN106402068A (en) | 2017-02-15 |
Family
ID=58009437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510457912.6A Pending CN106402068A (en) | 2015-07-29 | 2015-07-29 | Hydraulic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106402068A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09210006A (en) * | 1996-02-01 | 1997-08-12 | Sumitomo Constr Mach Co Ltd | Regenerative circuit for construction machine |
| CN1603635A (en) * | 2004-11-05 | 2005-04-06 | 宁波华液机器制造有限公司 | Proportional differential pressure control valve |
| CN1959166A (en) * | 2006-11-08 | 2007-05-09 | 宁波华液机器制造有限公司 | Direct action type proportional pressure-reducing valve |
| CN201851716U (en) * | 2010-11-09 | 2011-06-01 | 韩晓新 | Reducing valve |
| CN102312874A (en) * | 2010-07-08 | 2012-01-11 | 王雷 | One-way overflow valve |
| CN102410270A (en) * | 2011-11-09 | 2012-04-11 | 兰州理工大学 | Turning gradient control valve |
| CN103174693A (en) * | 2013-04-07 | 2013-06-26 | 华菱星马汽车（集团）股份有限公司 | Flow regeneration hydraulic lock valve device |
| CN103697314A (en) * | 2013-12-25 | 2014-04-02 | 郑州奥特科技有限公司 | Charge valve and lubricant tank with same |
| CN203615037U (en) * | 2013-12-25 | 2014-05-28 | 郑州奥特科技有限公司 | Oil charge valve and oil tank provided with same |
-
2015
- 2015-07-29 CN CN201510457912.6A patent/CN106402068A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09210006A (en) * | 1996-02-01 | 1997-08-12 | Sumitomo Constr Mach Co Ltd | Regenerative circuit for construction machine |
| CN1603635A (en) * | 2004-11-05 | 2005-04-06 | 宁波华液机器制造有限公司 | Proportional differential pressure control valve |
| CN1959166A (en) * | 2006-11-08 | 2007-05-09 | 宁波华液机器制造有限公司 | Direct action type proportional pressure-reducing valve |
| CN102312874A (en) * | 2010-07-08 | 2012-01-11 | 王雷 | One-way overflow valve |
| CN201851716U (en) * | 2010-11-09 | 2011-06-01 | 韩晓新 | Reducing valve |
| CN102410270A (en) * | 2011-11-09 | 2012-04-11 | 兰州理工大学 | Turning gradient control valve |
| CN103174693A (en) * | 2013-04-07 | 2013-06-26 | 华菱星马汽车（集团）股份有限公司 | Flow regeneration hydraulic lock valve device |
| CN103697314A (en) * | 2013-12-25 | 2014-04-02 | 郑州奥特科技有限公司 | Charge valve and lubricant tank with same |
| CN203615037U (en) * | 2013-12-25 | 2014-05-28 | 郑州奥特科技有限公司 | Oil charge valve and oil tank provided with same |
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Application publication date: 20170215 |