CN103644332B - A kind of revolution Foot braking valve - Google Patents
A kind of revolution Foot braking valve Download PDFInfo
- Publication number
- CN103644332B CN103644332B CN201310742472.XA CN201310742472A CN103644332B CN 103644332 B CN103644332 B CN 103644332B CN 201310742472 A CN201310742472 A CN 201310742472A CN 103644332 B CN103644332 B CN 103644332B
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- hydraulic fluid
- fluid port
- spool
- external hydraulic
- valve body
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sliding Valves (AREA)
Abstract
The invention discloses a kind of revolution Foot braking valve, comprise in spool chamber the valve body being fitted with spool, valve body has the external hydraulic fluid port A connecting selector valve, the motor hydraulic fluid port MA of B and connecting motor, MB and oil return inlet T, motor hydraulic fluid port MA, MB respectively each bypass has an one-way overflow valve, two one-way overflow valves share an oil return inlet T, be shaped with respectively in valve body spool chamber and be communicated with motor hydraulic fluid port MA, MB, external hydraulic fluid port A, the four road annular channels of B, spool is shaped with respectively and is communicated with or blocks motor hydraulic fluid port MA and external hydraulic fluid port A, the opening area of motor hydraulic fluid port MB and external hydraulic fluid port B and external hydraulic fluid port A and external hydraulic fluid port B is three road throttling grooves of gradual change type, and the throttling groove connecting external hydraulic fluid port B and external hydraulic fluid port A and the wash rice of other two throttling groove opening areas to become mode contrary, the two ends of valve body spool chamber are separately installed with left and right end cap, left end cap is shaped with the control oil pocket of effect spool ear end face manipulation spool action, control oil pocket and be fitted with control joint, valve core housing is furnished with spring reverse motion.
Description
Technical field
The present invention relates to the control technique of hydraulic system, particularly relate to the Rotatary brake valve being applied in hydraulic rotary motor in engineering mechanical device, specifically a kind of revolution Foot braking valve.
Background technique
Revolution Foot braking valve is that the one in hydraulic control system commonly uses valve, is widely used in the engineering machinery vehicle such as truck crane, crawler crane or hydraulic moving Control in Hydraulic Rotation System mechanically.In prior art, such valve can only realize pivotal deceleration and be decelerated to stopping when freely turning round; and be difficult to realize pivotal deceleration and be decelerated to stopping when normal revolution; therefore pivotal stationarity is relative with controllability poor; and such valve integration existing is poor; the multiple valve of some need connects through external pipeline; Security is also good not; easy generation hydraulic leak phenomenon; cause complicated integral structure; bulky; assemble very inconvenient, therefore ensureing motor and rotary braking to also have the space of improving.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned prior art present situation, and provides and have structure and be bolted and gather, turn round stationarity is good, controllability is strong one revolution Foot braking valve.
The present invention solves the problems of the technologies described above adopted technological scheme: a kind of revolution Foot braking valve, comprising in spool chamber slides is fitted with the valve body of spool, valve body has the external hydraulic fluid port A connecting selector valve, the motor hydraulic fluid port MA of B and connecting motor, MB and oil return inlet T, motor hydraulic fluid port MA, MB respectively each bypass has an one-way overflow valve be arranged on valve body, and this two one-way overflow valve shares an oil return inlet T, be shaped with respectively in the spool chamber of valve body and be communicated with motor hydraulic fluid port MA, MB, external hydraulic fluid port A, the four road annular channels of B, spool is shaped with respectively to slide and is communicated with or blocks motor hydraulic fluid port MA and external hydraulic fluid port A, the opening area of motor hydraulic fluid port MB and external hydraulic fluid port B and external hydraulic fluid port A and external hydraulic fluid port B is three road throttling grooves of gradual change type, and the throttling groove connecting external hydraulic fluid port B and external hydraulic fluid port A is contrary with the gradual manner of other two throttling groove opening areas, the two ends of valve body spool chamber are separately installed with left and right end cap, left end cap is shaped with the control oil pocket of effect spool ear end face manipulation spool action, control oil pocket and be fitted with control joint, valve core housing is furnished with spring reverse motion.
For optimizing technique scheme, the concrete measure taked also comprises:
The spool chamber that valve body is extended in the rear end of above-mentioned spool extend in the spring eye that left end cap is shaped with, spring reverse motion comprises and is arranged in left end cap spring eye and is sleeved on spring front stall, Returnning spring and spring back seat on spool extension successively, spring back seat is fixed on spool rear end through attachment screw, this attachment screw pad is furnished with pad, the front-end face of spring front stall is located with valve body left side and is matched, the two ends of Returnning spring respectively with spring front stall and spring back seat phase apical grafting.
Above-mentioned control joint spiral is arranged on left end cap and controls on the accent of oil pocket, and this control joints sleeve is furnished with the first seal ring, and controls joint and be shaped with control port Pst, in this control joint connection control hydraulic fluid port Pst and control oil pocket oil duct in be provided with damping.
The control oil pocket of above-mentioned left end cap is by the transverse holes coaxially communicated with spring eye and form with the vertical longitudinal hole communicated of transverse holes; The oil that the rear end of left end cap is provided with shutoff transverse holes aperture blocks up, and controls joint and is fitted on the aperture of longitudinal hole, the front end ring surface of left end cap is pressed with the second seal ring.
Above-mentioned right end cap adopts bolt to be fixedly mounted on the right side of valve body, and this right end cap is pressed with the 3rd seal ring, and right end cap is shaped with the hydraulic fluid port L connecting fuel tank.
Be positioned in the spool chamber of above-mentioned valve body first ring shape conduit left end be shaped with respectively with the second annular channel right-hand member together with annular drain pan, be shaped with the draining aperture being communicated with drain pan and oil return inlet T in valve body.
Ball is installed in above-mentioned draining aperture block up.
The above-mentioned motor hydraulic fluid port MA that is slidably connected is equal with the initial area of the throttling groove of external hydraulic fluid port B and the variance ratio of area with the motor hydraulic fluid port MB that is slidably connected with the throttling groove of external hydraulic fluid port A; In the process that spool moves right, the orifice size of this two throttling groove diminishes gradually, and the orifice size correspondingly connecting the throttling groove of external hydraulic fluid port A and external hydraulic fluid port B becomes large gradually.
Be closed state between external hydraulic fluid port A and external hydraulic fluid port B when above-mentioned spool is in initial, spool moves right to motor hydraulic fluid port MA during range and is closed state between external hydraulic fluid port A and between motor hydraulic fluid port MB and external hydraulic fluid port B.
Be shaped with the interior sprue being communicated with external hydraulic fluid port A and the 3rd annular channel and external hydraulic fluid port B and the 4th annular channel in above-mentioned valve body respectively, and in valve body, be shaped with the oil return duct being communicated with oil return inlet T.
Compared with prior art, an one-way overflow valve of motor hydraulic fluid port MA of the present invention and each bypass of motor hydraulic fluid port MB, is protected motor by off-load when can be passed to motor at the inertia turning round jib.Spool is shaped with the three road throttling grooves that three road opening areas are gradual change type; particularly connect the throttling groove of external hydraulic fluid port A and external hydraulic fluid port B; make a spool action to the right just can meet the demand of two operating modes, make this valve no matter be can realize pivotal deceleration when freely turning round or normally turn round and be decelerated to stopping.Advantage of the present invention is: compact structure, reasonable in design, revolution stationarity is good, can protect motor better when rotary braking, ensures the validity of rotary braking.
Accompanying drawing explanation
Fig. 1 is the working principle schematic diagram of the embodiment of the present invention;
Fig. 2 is the main TV structure schematic diagram of the embodiment of the present invention;
Fig. 3 is the plan view of Fig. 2;
Fig. 4 is the left view of Fig. 2;
Fig. 5 be in Fig. 4 A-A to generalized section;
Fig. 6 be in Fig. 2 B-B to generalized section;
Fig. 7 be in Fig. 3 C-C to generalized section;
Fig. 8 be in Fig. 4 D-D to sectional structure chart;
Fig. 9 is perspective view of the present invention;
Figure 10 is Fig. 2 rear view.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 is to Figure 10 shows that structural representation of the present invention.
Reference character is wherein: external hydraulic fluid port A, external hydraulic fluid port B, hydraulic fluid port L, oil return inlet T, motor hydraulic fluid port MA, motor hydraulic fluid port MB, control port Pst, interior sprue c, sprue d, valve body 1, first annular channel 1a, second annular channel 1b, 3rd annular channel 1c, 4th annular channel 1d, annular drain pan 1e, draining aperture 1f, oil return duct 1g, spool 2, throttling groove 2a, 2b, 2c, left end cap 4, control oil pocket 4a, spring eye 4b, oil stifled 41, second seal ring 42, right end cap 5, 3rd seal ring 51, spring reverse motion 6, spring front stall 61, Returnning spring 62, spring back seat 63, attachment screw 64, pad 65, control joint 7, damping 71, ball stifled 8, one-way overflow valve 9.
As shown in Figures 1 to 10, one revolution Foot braking valve of the present invention, comprising in spool chamber slides is fitted with the valve body 1 of spool 2, and valve body 1 has the external hydraulic fluid port A connecting selector valve, the motor hydraulic fluid port MA of B and connecting motor, MB and oil return inlet T, motor hydraulic fluid port MA, MB respectively each bypass has an one-way overflow valve 9 be arranged on valve body 1, and this two one-way overflow valve 9 shares an oil return inlet T, is shaped with respectively and is communicated with motor hydraulic fluid port MA in the spool chamber of valve body 1, MB, external hydraulic fluid port A, the four road annular channel 1a of B, 1b, 1c, 1d, spool 2 is shaped with respectively to slide and is communicated with or blocks motor hydraulic fluid port MA and external hydraulic fluid port A, the opening area of motor hydraulic fluid port MB and external hydraulic fluid port B and external hydraulic fluid port A and external hydraulic fluid port B is three road throttling groove 2a of gradual change type, 2b, 2c, and connect the throttling groove 2c of external hydraulic fluid port B and external hydraulic fluid port A and other two throttling groove 2a, the gradual manner of 2b opening area is contrary, and the two ends of valve body 1 spool chamber are separately installed with left and right end cap 4, 5, left end cap 4 is shaped with the control oil pocket 4a of effect spool 2 ear end face manipulation spool 2 action, and control oil pocket 4a and be fitted with control joint 7, spool 2 cover is furnished with spring reverse motion 6.The present invention is a kind of Rotatary brake valve be applied on the engineering machinery vehicle such as truck crane, crawler crane, because the structural design reason of such valve makes this kind of valve generally cannot realize pivotal deceleration in normal pivotal process or be decelerated to stopping in prior art.The present invention is shaped with three road throttling groove 2a, 2b, the 2c being respectively used to be communicated with motor hydraulic fluid port MA and external hydraulic fluid port A, motor hydraulic fluid port MB and external hydraulic fluid port B and external hydraulic fluid port A and external hydraulic fluid port B on spool 2, opening or closing in gradual change type in the process that throttling groove moves right at spool, thus making hydraulic oil identical to the effect of external hydraulic fluid port A with from external hydraulic fluid port B from external hydraulic fluid port A to external hydraulic fluid port B, the action that namely spool 2 moves right just can meet two operating modes.The motor hydraulic fluid port MA of this valve and an one-way overflow valve 9 of each bypass of motor hydraulic fluid port MB in addition, is protected motor by off-load when one-way overflow valve 9 can be passed to motor at the inertia turning round jib.No matter the present invention is can realize pivotal deceleration when freely turning round or normally turn round and be decelerated to stopping, and has compact structure, reasonable in design, the feature that revolution balance is good.
As can be seen from Fig. 4 and Fig. 5 in embodiment, the spool chamber that valve body 1 is extended in the rear end of spool 2 extend in the spring eye 4b that left end cap 4 is shaped with, spring reverse motion 6 comprises and is arranged in left end cap 4 spring eye 4b and is sleeved on spring front stall 61, Returnning spring 62 and spring back seat 63 on spool 2 extension successively, spring back seat 63 is fixed on spool 2 rear end through attachment screw 64, this attachment screw pad is furnished with pad 65, the front-end face of spring front stall 61 is located with valve body 1 left side and is matched, the two ends of Returnning spring 62 respectively with spring front stall 61 and spring back seat 63 phase apical grafting.
In embodiment, control joint 7 spiral is arranged on left end cap 4 and controls on the accent of oil pocket 4a, this control joint 7 cover is furnished with the first seal ring 72, and controls joint 7 and be shaped with control port Pst, in this control joint 7 connection control hydraulic fluid port Pst and control oil pocket 4a oil duct in be provided with damping 71.
In embodiment, the control oil pocket 4a of left end cap 4 is by the transverse holes coaxially communicated with spring eye 4b with form with the vertical longitudinal hole communicated of transverse holes as shown in Figure 4; The side face of spring back seat 63 matches with the inner circle wall liquid sealing of spring eye 4b, the rear end of left end cap 4 is provided with the oil stifled 41 in shutoff transverse holes aperture, controlling joint 7 is fitted on the aperture of longitudinal hole, the front end ring surface of left end cap 4 is pressed with the second seal ring 42.
In embodiment, as shown in Figure 4 and Figure 5, right end cap 5 adopts bolt to be fixedly mounted on the right side of valve body 1, and this right end cap 5 is pressed with the 3rd seal ring 51, and right end cap 5 is shaped with the hydraulic fluid port L connecting fuel tank.
In embodiment, please continue see Fig. 4 and Fig. 5, be positioned in the spool chamber of valve body 1 first ring shape conduit 1a left end be shaped with respectively with the second annular channel 1b right-hand member together with annular drain pan 1e, be shaped with the draining aperture 1f being communicated with drain pan 1e and oil return inlet T in valve body 1.Six road annular grooves have been shaped with altogether in spool chamber of the present invention, wherein two thin annular grooves on both sides and drain pan 1e, oil return inlet T is connected to by draining aperture 1f, because middle four articles of annular grooves i.e. the first annular channel 1a, the second annular channel 1b, the 3rd annular channel 1c, the 4th annular channel 1d exist the operating mode of high pressure, for avoiding high pressure oil by the clearance leakage of spool 2 and spool bore to Pst mouth, thus pilot pressure can be interfered with.Pst mouth is used for connecing leading type foot valve in addition.
In embodiment as shown in Figure 8, ball stifled 8 is installed in draining aperture 1f, is used as technique plug, small volume, save space.
In embodiment, the motor hydraulic fluid port MA that is slidably connected is equal with the initial area of the throttling groove 2b of external hydraulic fluid port B and the variance ratio of area with the motor hydraulic fluid port MB that is slidably connected with the throttling groove 2a of external hydraulic fluid port A; In the process that spool 2 moves right, the orifice size of this two throttling groove 2a, 2b diminishes gradually, and the orifice size correspondingly connecting the throttling groove 2c of external hydraulic fluid port A and external hydraulic fluid port B becomes large gradually.Because external hydraulic fluid port A to motor hydraulic fluid port MA, motor hydraulic fluid port MB can two-way flows to external hydraulic fluid port B to external hydraulic fluid port B, external hydraulic fluid port A, so hydraulic oil is identical to the effect of external hydraulic fluid port A with from external hydraulic fluid port B from external hydraulic fluid port A to external hydraulic fluid port B, the action that namely spool moves right just can meet two operating modes.Ensure that this valve can not only realize pivotal deceleration and be decelerated to stopping when freely turning round, and also can realize pivotal deceleration when normal revolution and be decelerated to stopping.
In embodiment, be closed state when spool 2 is in initial between external hydraulic fluid port A and external hydraulic fluid port B, spool 2 moves right to motor hydraulic fluid port MA during range and is closed state between external hydraulic fluid port A and between motor hydraulic fluid port MB and external hydraulic fluid port B.One-way overflow valve 9 can be rapidly at spool 2 and move right to range place; motor hydraulic fluid port MA, MB close; because the inertia turning round jib is large; be passed to motor; impelling two hydraulic fluid ports one to suppress high pressure one inhales empty; now suppress on high-tension side one-way overflow valve relief, the one-way overflow valve inhaling empty side can repairing, protects motor.
In embodiment, in valve body 1, be shaped with interior sprue c, d of being communicated with external hydraulic fluid port A and the 3rd annular channel 1c and external hydraulic fluid port B and the 4th annular channel 1d respectively, and in valve body 1, be shaped with the oil return duct 1g being communicated with oil return inlet T.
Compact structure of the present invention, rotary braking balance is good, can protect motor better when rotary braking, ensures the validity of rotary braking.
Claims (10)
1. a revolution Foot braking valve, comprising in spool chamber slides is fitted with the valve body (1) of spool (2), described valve body (1) has the external hydraulic fluid port A connecting selector valve, the motor hydraulic fluid port MA of B and connecting motor, MB and oil return inlet T, it is characterized in that: described motor hydraulic fluid port MA, MB respectively each bypass has an one-way overflow valve (9) be arranged on valve body (1), and this two one-way overflow valve (9) shares an oil return inlet T, be shaped with respectively in the spool chamber of described valve body (1) and be communicated with motor hydraulic fluid port MA, MB, external hydraulic fluid port A, the four road annular channel (1a of B, 1b, 1c, 1d), described spool (2) is shaped with respectively to slide and is communicated with or blocks motor hydraulic fluid port MA and external hydraulic fluid port A, the opening area of motor hydraulic fluid port MB and external hydraulic fluid port B and external hydraulic fluid port A and external hydraulic fluid port B is three road throttling groove (2a of gradual change type, 2b, 2c), and connect the throttling groove (2c) of external hydraulic fluid port B and external hydraulic fluid port A and other two throttling groove (2a, 2b) gradual manner of opening area is contrary, the two ends of described valve body (1) spool chamber are separately installed with left and right end cap (4, 5), described left end cap (4) is shaped with the control oil pocket (4a) of effect spool (2) ear end face manipulation spool (2) action, described control oil pocket (4a) is fitted with and controls joint (7), described spool (2) cover is furnished with spring reverse motion (6).
2. one revolution Foot braking valve according to claim 1, it is characterized in that: the spool chamber that valve body (1) is extended in the rear end of described spool (2) extend in the spring eye (4b) that left end cap (4) is shaped with, described spring reverse motion (6) comprises and is arranged in left end cap (4) spring eye (4b) and is sleeved on spring front stall (61) on spool (2) extension successively, Returnning spring (62) and spring back seat (63), described spring back seat (63) is fixed on spool (2) rear end through attachment screw (64), this attachment screw pad is furnished with pad (65), the front-end face of described spring front stall (61) is located with valve body (1) left side and is matched, the two ends of described Returnning spring (62) respectively with spring front stall (61) and spring back seat (63) phase apical grafting.
3. one revolution Foot braking valve according to claim 2, it is characterized in that: described control joint (7) spiral is arranged on left end cap (4) and controls on the accent of oil pocket (4a), this control joint (7) cover is furnished with the first seal ring (72), and described control joint (7) is shaped with control port Pst, in the oil duct of connection control hydraulic fluid port Pst and control oil pocket (4a) in this control joint (7), be provided with damping (71).
4. one revolution Foot braking valve according to claim 3, is characterized in that: the control oil pocket (4a) of described left end cap (4) is by the transverse holes coaxially communicated with spring eye (4b) and form with the vertical longitudinal hole communicated of transverse holes; The rear end of described left end cap (4) is provided with the oil stifled (41) in shutoff transverse holes aperture, described control joint (7) is fitted on the aperture of longitudinal hole, and the front end ring surface of described left end cap (4) is pressed with the second seal ring (42).
5. one revolution Foot braking valve according to claim 4, it is characterized in that: described right end cap (5) adopts bolt to be fixedly mounted on the right side of valve body (1), this right end cap (5) is pressed with the 3rd seal ring (51), and described right end cap (5) is shaped with the hydraulic fluid port L connecting fuel tank.
6. one revolution Foot braking valve according to claim 5, it is characterized in that: be positioned in the spool chamber of described valve body (1) first ring shape conduit (1a) left end be shaped with respectively with the second annular channel (1b) right-hand member together with annular drain pan (1e), be shaped with in described valve body (1) and be communicated with drain pan (1e) and the draining aperture (1f) of oil return inlet T.
7. one revolution Foot braking valve according to claim 6, is characterized in that: be provided with ball stifled (8) in described draining aperture (1f).
8. one revolution Foot braking valve according to claim 7, is characterized in that: the motor hydraulic fluid port MA that is slidably connected is equal with throttling groove (2b) both initial area of external hydraulic fluid port B and the variance ratio of area with the motor hydraulic fluid port MB that is slidably connected with the throttling groove (2a) of external hydraulic fluid port A; In the process that described spool (2) moves right, the orifice size of this two throttling groove (2a, 2b) diminishes gradually, and correspondingly the orifice size of the throttling groove (2c) of described connection external hydraulic fluid port A and external hydraulic fluid port B becomes large gradually.
9. one revolution Foot braking valve according to claim 8, it is characterized in that: for closed state between the external hydraulic fluid port A described in when described spool (2) is in initial and external hydraulic fluid port B, described spool (2) moves right between the motor hydraulic fluid port MA described in during range and external hydraulic fluid port A and is closed state between motor hydraulic fluid port MB and external hydraulic fluid port B.
10. one revolution Foot braking valve according to claim 9, it is characterized in that: in described valve body (1), be shaped with the interior sprue (c, d), and be shaped with the oil return duct (1g) of connection oil return inlet T in valve body (1) being communicated with external hydraulic fluid port A and the 3rd annular channel (1c) and external hydraulic fluid port B and the 4th annular channel (1d) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310742472.XA CN103644332B (en) | 2013-12-30 | 2013-12-30 | A kind of revolution Foot braking valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310742472.XA CN103644332B (en) | 2013-12-30 | 2013-12-30 | A kind of revolution Foot braking valve |
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| Publication Number | Publication Date |
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| CN103644332A CN103644332A (en) | 2014-03-19 |
| CN103644332B true CN103644332B (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310742472.XA Active CN103644332B (en) | 2013-12-30 | 2013-12-30 | A kind of revolution Foot braking valve |
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| CN (1) | CN103644332B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606212B (en) * | 2017-10-23 | 2024-04-30 | 西安航空制动科技有限公司 | Buffer device for stop/emergency brake valve |
| CN109826839B (en) * | 2019-03-29 | 2024-05-17 | 潍柴动力股份有限公司 | Anti-reverse valve for rotary motor and engineering machinery |
| CN114278635A (en) * | 2021-12-29 | 2022-04-05 | 潍柴动力股份有限公司 | Anti-reverse valve for rotary motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3406570A1 (en) * | 1984-02-23 | 1985-09-12 | Mannesmann Rexroth GmbH, 8770 Lohr | ELECTROMAGNET / VALVE ARRANGEMENT |
| CN101373027B (en) * | 2008-08-08 | 2010-08-25 | 锦州市力特缸泵阀液压制造有限公司 | Multi-way change valve |
| CN201574432U (en) * | 2009-12-16 | 2010-09-08 | 青岛凯锐斯通液压机械有限公司 | Rotary control valve |
| CN201771881U (en) * | 2010-04-26 | 2011-03-23 | 三一重机有限公司 | Rotary valve core used for excavator |
| CN203614820U (en) * | 2013-12-30 | 2014-05-28 | 卢宇 | Rotation pedal brake valve |
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2013
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Owner name: NINGBO JIANGBEI YUZHOU HYDRAULIC EQUIPMENT FACTORY Free format text: FORMER OWNER: LU YU Effective date: 20150722 |
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Effective date of registration: 20150722 Address after: Jiangbei District in Zhejiang province 315021 Hing Ningbo Yonglu No. 98 Ningbo Jiangbei Yuzhou hydraulic equipment factory Applicant after: Ningbo Jiangbei Yuzhou Hydraulic Equipment Factory Address before: Jiangbei District in Zhejiang province 315021 Hing Ningbo Yonglu No. 98 Ningbo Jiangbei Yuzhou hydraulic equipment factory Applicant before: Lu Yu |
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Address after: Jiangbei District in Zhejiang province 315021 Hing Ningbo Yonglu No. 98 Patentee after: Ningbo Yuzhou Hydraulic Equipment Co.,Ltd. Address before: Jiangbei District in Zhejiang province 315021 Hing Ningbo Yonglu No. 98 Ningbo Jiangbei Yuzhou hydraulic equipment factory Patentee before: NINGBO JIANGBEI YUZHOU HYDRAULIC EQUIPMENT FACTORY |