CN108644105B - One-way valve for hydraulic tool and hydraulic tool - Google Patents
One-way valve for hydraulic tool and hydraulic tool Download PDFInfo
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- CN108644105B CN108644105B CN201810603782.6A CN201810603782A CN108644105B CN 108644105 B CN108644105 B CN 108644105B CN 201810603782 A CN201810603782 A CN 201810603782A CN 108644105 B CN108644105 B CN 108644105B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
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Abstract
The invention relates to the technical field of hydraulic tools, in particular to a one-way valve for a hydraulic tool and the hydraulic tool, wherein the hydraulic tool comprises a pump body, a fixed handle, a movable handle and a one-way valve, a valve hole is formed in the pump body, the one-way valve is arranged in the valve hole, the one-way valve comprises a butterfly-shaped check ring, an elastic piece and a steel ball, the butterfly-shaped check ring comprises a base, the base and the steel ball are clamped in the valve hole, the middle part of the base protrudes outwards to form a connecting boss, one end of the elastic piece is clamped on the connecting boss, and the other end of the elastic piece is propped against the steel ball; the front end of the pump body is provided with a working part, the rear end of the pump body is connected with a fixed handle, the inside of the fixed handle is hollow and is provided with an oil bag for storing hydraulic oil, and one side of the pump body is also connected with a stop valve. The one-way valve adopts the butterfly check ring, and when the one-way valve is installed, the steel ball and the elastic piece are firstly placed into the valve hole in sequence, and then the butterfly check ring is pushed in, so that tapping is not needed to be carried out in the valve hole, burrs are not generated due to tapping, the process is simplified, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of hydraulic tools, in particular to a one-way valve for a hydraulic tool and the hydraulic tool.
Background
The hydraulic tool is used as a power element of a hydraulic system and comprises a plurality of types, wherein the manual hydraulic tool is driven by manually pressing a movable handle, oil is sucked from an oil bag, and then pressure oil is formed and discharged until the oil is sent to an executing element for working. The core working position of the hydraulic tool is the pump body, a valve hole is formed in the pump body, and a one-way valve is usually arranged in the valve hole, so that oil can enter and exit in the valve hole in a one-way manner and is transported. In the existing hydraulic tool, an internal one-way valve usually adopts a single nut structure, and comprises a nut, a spring and a steel ball, when the hydraulic tool is installed, the nut is connected in a valve hole through threads, so that a stepped hole in the valve hole is required to be tapped firstly, the valve hole is usually smaller, burrs generated by the tapping are difficult to remove, and the burrs can cause the failure of the one-way valve after the nut is screwed with a threaded hole in the valve hole; meanwhile, the manufacturing and processing procedures of the nut are complex, and burrs which are difficult to remove are generated on the surface of the part.
Disclosure of Invention
The invention aims to solve the problems and provides a one-way valve which does not need to tap and remove burrs on a valve hole during installation and a hydraulic tool provided with the one-way valve.
The purpose of the invention is realized in the following way:
a check valve for hydraulic tool, hydraulic tool includes the pump body, has seted up the valve opening in the pump body, and the check valve is installed in the valve opening, the check valve includes butterfly retaining ring, elastic component and steel ball, the butterfly retaining ring includes the base, and base and steel ball all block in the valve opening, the outside protrusion in base middle part forms the connection boss, elastic component one end card is on this connection boss, and the other end supports on the steel ball.
The butterfly-shaped check ring is of a butterfly-shaped structure formed by stamping spring steel and heat treatment, a through hole is formed in the middle of the butterfly-shaped check ring, and a plurality of slotted holes are formed in the periphery of the base.
The elastic piece is a tower-shaped spring, the inner diameter of a spring ring of the tower-shaped spring is sequentially reduced, one end with larger inner diameter of the spring ring is sleeved on the periphery of the connecting boss, and one end with smaller inner diameter of the spring ring is propped against the periphery of the steel ball.
The utility model provides a hydraulic tool, includes the pump body, fixed handle, movable handle and foretell check valve, set up the valve opening in the pump body, install in the valve opening the check valve, the pump body front end is provided with working piece, and the pump body rear end is connected with fixed handle, the inside cavity of fixed handle is provided with the oil bag that is used for depositing hydraulic oil, and pump body one side still is connected with the stop valve.
The valve is characterized in that the inner wall of the valve hole is in a step shape, a step structure is formed, and the edge of the base of the butterfly-shaped check ring is installed on the step structure in an interference fit mode.
The valve hole comprises an oil inlet channel and an oil outlet channel, the one-way valves are arranged in the oil inlet channel and the oil outlet channel, the one-way valves in the oil inlet channel are oil inlet one-way valves, the one-way valves in the oil outlet channel are oil outlet one-way valves, and an oil inlet of the oil inlet channel and an oil outlet of the oil outlet channel are both communicated to the oil bag.
The movable handle is further arranged on the side of the oil inlet channel, and is communicated with a first working cavity which is internally provided with a plunger which can be driven by the movable handle to reciprocate; the oil inlet channel comprises an oil inlet channel I and an oil inlet channel II, and the oil inlet one-way valve is positioned between the oil inlet channel I and the oil inlet channel II; an oil inlet steel ball is arranged at the oil outlet of the oil inlet channel I.
The oil outlet channel is further provided with a second working cavity communicated with one side, and the stop valve is arranged in the second working cavity; an oil return channel is arranged in the pump body, and an outlet of the oil return channel is communicated with the second working cavity.
The stop valve is further arranged, the stop valve comprises a push rod, a stop valve steel ball and a driving piece, the push rod is located inside the pump body, the driving piece is located outside the pump body, the push rod is driven by the driving piece to reciprocate in the second working cavity, and the stop valve steel ball is located in the second working cavity and can be blocked at an oil outlet of the oil return channel.
The working cavity is formed in the pump body, the piston is movably arranged in the working cavity, the piston is connected to the working part, the working part is a clamp head, the clamp head comprises a clamp head main body and a pressing die, and the pressing die reciprocates under the driving of the piston.
Compared with the prior art, the invention has the following outstanding and beneficial technical effects:
1. the one-way valve adopts the butterfly-shaped check ring, the butterfly-shaped check ring comprises the base and the connecting boss, when the one-way valve is installed, the steel ball and the elastic piece are sequentially placed in the valve hole, and then the butterfly-shaped check ring is pushed in, so that tapping is not needed in the valve hole, burrs are not generated due to the tapping, compared with the prior art, the tapping process is reduced, the process is simplified, the production efficiency is improved, the one-way valve is also protected, and the service life is prolonged;
2. the butterfly check ring is formed by punching spring steel and performing heat treatment, so that the strength and elasticity of the butterfly check ring are improved to a certain extent, and the connecting boss punched by the butterfly check ring can effectively position and support an internal elastic piece (the elastic piece provided by the invention is a tower-shaped spring), so that the reliability and stability of the check valve are improved;
3. the hydraulic tool provided by the invention has a compact structure, the one-way valve is matched for use, the processing technology is simplified, the semi-automatic assembly can be realized, the butterfly check ring adopts the stamping part, the manufacturing cost is low, tapping in the valve hole of the pump body is not needed, and the production and manufacturing cost is further reduced;
4. according to the hydraulic tool provided by the invention, the inner valve hole is in a step shape, the step structure is formed, the edge of the base of the butterfly check ring is directly in interference fit with the step structure, and through a large number of experiments, the acting force generated by the interference fit is far greater than the stamping force of oil and the elastic piece on the butterfly check ring, so that when the oil passes through the one-way valve, the butterfly check ring cannot be separated from the step structure in the pump hole due to the stamping force of the oil, and the stability of the one-way valve is well ensured.
Drawings
Fig. 1 is an exploded view of the structure of the check valve of the present invention.
Fig. 2 is a side view of the check valve butterfly retainer of the present invention mated with a valve bore.
Fig. 3 is a cross-sectional view of the check valve of the present invention installed in a valve hole.
Fig. 4 is one of the partial cross-sectional views of the hydraulic tool of the present invention.
Fig. 5 is a partially enlarged view at a of fig. 4.
Fig. 6 is a partial enlarged view at B of fig. 5.
Fig. 7 is a second partial cross-sectional view of the hydraulic tool of the present invention.
Fig. 8 is a partially enlarged view at C of fig. 7.
Detailed Description
The invention is further described in the following embodiments with reference to the figures, see fig. 1-8:
a check valve for hydraulic tool, hydraulic tool includes pump body 1, has seted up valve opening 11 in the pump body 1, and the check valve is installed in valve opening 11, the check valve includes butterfly retaining ring 21, elastic component and steel ball 22, butterfly retaining ring 21 includes base 211, and base 211 and steel ball 22 all block in the valve opening, and the outside protrusion in base 211 middle part forms connection boss 212, elastic component one end card is on this connection boss 212, and the other end supports on the steel ball 22.
The butterfly-shaped check ring 21 is of a butterfly-shaped structure formed by punching spring steel and performing heat treatment, a through hole 213 is formed in the middle of the butterfly-shaped check ring 21, a plurality of slots 2112 are also formed around the base 211, and oil flows out through the through hole 213 in the middle and the slots 2112 around when passing through the butterfly-shaped check ring.
The elastic piece is a tower-shaped spring 23, the inner diameters of spring rings of the tower-shaped spring 23 are sequentially reduced, one end with a larger inner diameter of each spring ring is sleeved on the periphery of the connecting boss 212, and one end with a smaller inner diameter of each spring ring is propped against the periphery of the steel ball 22.
The hydraulic tool with the one-way valve comprises a pump body 1, a fixed handle 3, a movable handle 4 and the one-way valve, wherein a valve hole is formed in the pump body 1, the one-way valve is installed in the valve hole, a working part is arranged at the front end of the pump body 1, the rear end of the pump body 1 is connected with the fixed handle 3, an oil bag 31 for storing hydraulic oil is hollow in the fixed handle 3, and a stop valve 6 is further connected to one side of the pump body 1. One end of the movable handle 4 is hinged on the pump body 1 through a bracket 43, and the bracket 43 is connected on the movable handle 4 through a bolt 42 or a bolt and the like.
The inner wall of the valve hole is in a step shape, a step structure 12 is formed, and the base edge of the butterfly-shaped check ring 21 is installed on the step structure 12 in an interference fit mode. As shown in fig. 2, the base 211 of the butterfly-shaped retainer ring 21 of this embodiment is provided with a plurality of connection pieces 2111, the slot hole 2112 is formed between every two connection pieces 2111, the butterfly-shaped retainer ring 21 is clamped on the step structure 12 by means of interference of the outer edges of these connection pieces 2111, and through a great deal of experiments, the acting force generated between the connection pieces and the valve hole during interference fit is far greater than the stamping force of oil and the tower-shaped spring on the butterfly-shaped retainer ring, so when the oil passes through the one-way valve, the butterfly-shaped retainer ring cannot be separated from the step structure in the pump hole due to the stamping force of the oil, and the stability of the one-way valve is well ensured.
The valve hole is an oil path channel formed in the pump body and comprises an oil inlet channel and an oil outlet channel, the check valves are arranged in the oil inlet channel and the oil outlet channel, the check valves in the oil inlet channel are oil inlet check valves, the check valves in the oil outlet channel are oil outlet check valves, and an oil inlet of the oil inlet channel and an oil outlet of the oil outlet channel are both communicated to the oil bag 31.
The specific structure of the oil inlet channel and the oil inlet one-way valve and the connection structure of the oil inlet channel and the oil inlet one-way valve are as follows:
one side of the oil inlet channel is communicated with a first working cavity 13, and a plunger 41 which can be driven by the movable handle 4 to reciprocate is arranged in the first working cavity 13; the oil inlet channel comprises an oil inlet channel I141 and an oil inlet channel II 142, and the oil inlet one-way valve is positioned in a mounting cavity 143 formed between the oil inlet channel I141 and the oil inlet channel II 142; the front end and the rear end of the mounting cavity 143 are respectively provided with a step structure 12, the oil inlet one-way valve comprises a butterfly-shaped check ring 21, a tower-shaped spring 23 and a steel ball 22, the butterfly-shaped check ring 21 is clamped at the step structure 12, the steel ball 22 is propped against the step structure 12 under the action of the tower-shaped spring 23, and an oil inlet steel ball 15 is further arranged at the oil outlet of the oil inlet channel I141.
The working principle of the oil inlet one-way valve is as follows: when the movable handle 3 is lifted upwards, the movable handle 3 brings the plunger 41 upwards, the airtight volume in the first working cavity 13 is increased, the pressure is reduced, hydraulic oil in the oil bag flows into the oil inlet channel I141, the oil inlet steel ball 15 at the oil outlet is jacked up, and the oil enters the first working cavity 13 through the oil inlet channel I141; when the movable handle 3 is pressed downwards, the movable handle 3 presses the plunger 41 downwards, the airtight volume in the first working cavity 13 is reduced, oil in the first working cavity 13 is gathered to the first oil inlet channel 141 under the extrusion of the plunger 41, the oil props the oil inlet steel ball 15 against the oil outlet of the first oil inlet channel, the oil pushes the steel ball 22 forwards due to the blocking of the oil inlet steel ball 15, and the oil enters the mounting cavity 143 and flows into the second oil inlet channel 142 along the through hole 213 in the middle of the butterfly retainer ring 21 and surrounding slotted holes 2112.
The specific structure of the oil outlet channel and the oil outlet one-way valve and the connection structure of the oil outlet channel and the oil outlet one-way valve are as follows:
an installation cavity 173 for installing an oil outlet one-way valve is formed in the oil outlet channel 171, step structures are formed at the front end and the rear end of the installation cavity 173, the oil outlet one-way valve comprises a butterfly-shaped check ring 21, a tower-shaped spring 23 and a steel ball 22, the butterfly-shaped check ring 21 is clamped at the step structures, and the steel ball 22 is propped against the step structures under the action of the tower-shaped spring 23 as the oil inlet one-way valve; a second working chamber 16 is communicated with one side of the oil outlet channel 171, and the stop valve 6 is arranged in the second working chamber 16; an oil return channel 172 is formed in the pump body 1, and an outlet of the oil return channel 172 is communicated with the second working chamber 16. The stop valve 6 includes a push rod 61 located inside the pump body 1, a stop valve steel ball 63, and a driving member 62 located outside the pump body 1 (in this embodiment, the driving member is a rotating wheel, the push rod 61 is screwed in the pump body, the rotating wheel rotates to drive the push rod to reciprocate in the pump body), the inner end of the push rod 61 reciprocates in the second working chamber 16 under the driving of the driving member 62, and the stop valve steel ball 63 is located in the second working chamber 16 and can be blocked at the oil outlet of the oil return channel 172.
The working principle of the oil outlet one-way valve is as follows: the driving piece 62 is rotated to open the stop valve, when the push rod 61 is driven by the driving piece 62 to move upwards, the volume of the second working cavity 16 is increased, the pressure is reduced, the stop valve steel ball 63 is separated from the outlet of the oil return channel under the pushing of the oil in the oil return channel 172, the oil enters the second working cavity in a homeotropic manner and flows to the oil outlet channel 171, the steel ball 22 opens the step structure under the pushing of the oil, so that the oil outlet one-way valve is driven to open, the oil flows to the oil bag through the through hole 213 in the middle of the butterfly-shaped retainer ring 21 and the surrounding slotted holes 2112, and the pressure relief process is completed; when the stop valve is closed, the stop valve steel ball is blocked at the outlet of the oil return channel 172, no pressure difference is formed among the second working chamber 16, the oil outlet channel and the oil bag, and the oil outlet one-way valve is kept in a closed state.
The pump body 1 is internally provided with a working cavity, the oil outlet of the oil inlet channel II 142 and the oil inlet of the oil return channel 172 are both communicated with the working cavity, a piston 7 is movably arranged in the working cavity 18, the piston 7 is connected to the working part, the working part is a clamp head 5, the clamp head 5 comprises a clamp head main body 51 and a pressing die 52, and the pressing die 52 reciprocates under the drive of the piston 18.
In order to enhance the tightness of the whole structure, sealing rings 9 are arranged at the joint of the oil bag and the pump body, the joint of the plunger and the pump body, the joint of the push rod and the pump body and the joint of the piston and the pump body.
The working principle of the invention is as follows:
closing the stop valve, wherein the oil outlet one-way valve keeps a closed state, lifting the movable handle upwards, lifting the plunger upwards by the movable handle, increasing the airtight volume in the first working cavity, reducing the pressure, enabling hydraulic oil in the oil bag to flow into the first oil inlet channel, pushing the oil inlet steel ball at the oil outlet open, and enabling the oil to enter the first working cavity through the first oil inlet channel; when the movable handle is pressed downwards, the movable handle presses down the plunger, the airtight volume in the first working cavity is reduced, oil in the first working cavity is gathered to the first oil inlet channel under the extrusion of the plunger, the oil props the oil inlet steel ball against the oil outlet of the first oil inlet channel, the oil pushes the steel ball forwards due to the blocking of the oil inlet steel ball, the oil enters the mounting cavity and flows into the second oil inlet channel along the through hole in the middle of the butterfly-shaped retainer ring and the surrounding slotted hole, and the stop valve is closed at the moment, the steel ball is blocked at the oil outlet of the oil return channel, so that the oil cannot be discharged, the piston moves forwards under the pushing of the oil, the working part is driven to move, and the processes of lifting and pressing the movable handle upwards are repeated in sequence, so that the crimping work is completed; when the working is stopped to release pressure, the stop valve is opened by only rotating the driving part, when the push rod moves upwards under the driving of the driving part, the volume of the second working cavity is increased, the pressure is reduced, the steel ball of the stop valve is separated from the outlet of the oil return channel under the pushing of the oil in the oil return channel, the oil enters the second working cavity in a homeotropic manner and flows to the oil outlet channel, the steel ball opens the step structure under the pushing of the oil, so that the oil outlet one-way valve is opened, the oil flows to the oil bag through the through hole in the middle of the butterfly-shaped check ring and the surrounding slotted holes, and the pressure release process is completed.
The one-way valve of the invention adopts the butterfly-shaped check ring, the butterfly-shaped check ring is manufactured by stamping spring steel, the strength and the elasticity are improved by heat treatment, and the one-way valve of the butterfly-shaped check ring is used, as the valve hole of the pump body is in a step shape, tapping is not needed, the tapping procedure can be reduced, and burrs are not generated due to tapping; the connecting boss punched by the butterfly-shaped check ring can effectively play a role in positioning and supporting the internal tower-shaped spring and improve the reliability of the check valve. During installation, the steel ball and the tower-shaped spring are sequentially placed into the step hole (valve hole) in the pump body, and then the butterfly-shaped check ring is pushed in, so that the assembly process is simplified, and semi-automatic assembly can be realized; the butterfly check ring adopts the stamping workpiece, low in manufacturing cost to need not tap the screw thread in the valve opening, further reduce manufacturing cost.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (8)
1. The one-way valve for the hydraulic tool comprises a pump body, wherein a valve hole is formed in the pump body, and the one-way valve is arranged in the valve hole;
the butterfly-shaped check ring is formed by stamping spring steel and performing heat treatment, a through hole is formed in the middle of the butterfly-shaped check ring, and a plurality of slotted holes are formed in the periphery of the base;
the inner wall of the valve hole is in a step shape, a step structure is formed, and the edge of the base of the butterfly-shaped check ring is installed on the step structure in an interference fit manner; the base of butterfly retaining ring is provided with a plurality of connection pieces, forms between every two connection pieces the slotted hole, and butterfly retaining ring relies on the interference block of the outward flange of these connection pieces to be on step structure.
2. The one-way valve for a hydraulic tool of claim 1, wherein: the elastic piece is a tower-shaped spring, the inner diameter of a spring ring of the tower-shaped spring is sequentially reduced, one end with larger inner diameter of the spring ring is sleeved on the periphery of the connecting boss, and one end with smaller inner diameter of the spring ring is propped against the periphery of the steel ball.
3. A hydraulic tool comprising a pump body, a fixed handle, a movable handle and a one-way valve according to any one of claims 1-2, characterized in that: the hydraulic pump is characterized in that a valve hole is formed in the pump body, the check valve is arranged in the valve hole, a working part is arranged at the front end of the pump body, the rear end of the pump body is connected with a fixed handle, the inside of the fixed handle is hollow and is provided with an oil bag for storing hydraulic oil, and one side of the pump body is also connected with a stop valve.
4. A hydraulic tool as in claim 3 wherein: the valve hole comprises an oil inlet channel and an oil outlet channel, the check valves are arranged in the oil inlet channel and the oil outlet channel, the check valve in the oil inlet channel is an oil inlet check valve, the check valve in the oil outlet channel is an oil outlet check valve, and an oil inlet of the oil inlet channel and an oil outlet of the oil outlet channel are both communicated to the oil bag.
5. The hydraulic tool of claim 4 wherein: one side of the oil inlet channel is communicated with a first working cavity, and a plunger which can be driven by the movable handle to reciprocate is arranged in the first working cavity; the oil inlet channel comprises an oil inlet channel I and an oil inlet channel II, and the oil inlet one-way valve is positioned between the oil inlet channel I and the oil inlet channel II; an oil inlet steel ball is arranged at the oil outlet of the oil inlet channel I.
6. The hydraulic tool of claim 4 wherein: one side of the oil outlet channel is communicated with a second working cavity, and the stop valve is arranged in the second working cavity; an oil return channel is arranged in the pump body, and an outlet of the oil return channel is communicated with the second working cavity.
7. The hydraulic tool of claim 6 wherein: the stop valve comprises a push rod, a stop valve steel ball and a driving piece, wherein the push rod is positioned in the pump body, the driving piece is positioned outside the pump body, the push rod is driven by the driving piece to reciprocate in the second working cavity, and the stop valve steel ball is positioned in the second working cavity and can be blocked at the oil outlet of the oil return channel.
8. A hydraulic tool as in claim 3 wherein: the pump body is internally provided with a working cavity, a piston is movably arranged in the working cavity and connected to the working part, the working part is a clamp head, the clamp head comprises a clamp head main body and a pressing die, and the pressing die reciprocates under the drive of the piston.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810603782.6A CN108644105B (en) | 2018-06-12 | 2018-06-12 | One-way valve for hydraulic tool and hydraulic tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810603782.6A CN108644105B (en) | 2018-06-12 | 2018-06-12 | One-way valve for hydraulic tool and hydraulic tool |
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| Publication Number | Publication Date |
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| CN108644105A CN108644105A (en) | 2018-10-12 |
| CN108644105B true CN108644105B (en) | 2023-06-30 |
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| CN201810603782.6A Active CN108644105B (en) | 2018-06-12 | 2018-06-12 | One-way valve for hydraulic tool and hydraulic tool |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268334A (en) * | 2018-11-20 | 2019-01-25 | 台州巨力工具有限公司 | A kind of check valve and hydraulic tool for hydraulic tool |
| CN111664089A (en) * | 2020-05-26 | 2020-09-15 | 宁波圣龙汽车动力***股份有限公司 | Electronic oil pump |
| CN114109803B (en) * | 2021-07-26 | 2024-04-26 | 浙江飞越机电有限公司 | Eccentric plunger structure of hydraulic pipe fitting processing tool |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035025U (en) * | 1988-04-09 | 1989-03-29 | 李明成 | Sealing device for the piston of driving pump of a hydraulic jack |
| CN2035814U (en) * | 1988-07-25 | 1989-04-12 | 江苏省南通县液压机械厂 | Hand-pushing hydraulic intensifier |
| JP2001341659A (en) * | 2000-05-31 | 2001-12-11 | Koyo Seiko Co Ltd | Damper valve and hydraulic power steering device using it |
| CN101469786A (en) * | 2007-12-29 | 2009-07-01 | 上海立新液压有限公司 | Non-return valve with valve housing |
| CN201757042U (en) * | 2010-07-30 | 2011-03-09 | 冯振强 | Reciprocating plunger pump |
| CN102200193A (en) * | 2010-05-24 | 2011-09-28 | 浙江万向精工有限公司 | Plunger pump check valve |
| CN102686883A (en) * | 2009-12-23 | 2012-09-19 | 罗伯特·博世有限公司 | Piston pump for a hydraulic vehicle braking system |
| CN202597788U (en) * | 2012-03-28 | 2012-12-12 | 浙江澳川液压器材有限公司 | Hydraulic check valve |
| CN103052834A (en) * | 2010-08-19 | 2013-04-17 | 罗伯特·博世有限公司 | Valve, in particular of a hydraulic piston pump |
| CN103850833A (en) * | 2012-12-03 | 2014-06-11 | 马涅蒂-马瑞利公司 | Fuel supply pump |
| CN104405604A (en) * | 2014-10-20 | 2015-03-11 | 浙江大学 | Ultrahigh-pressure axial plunger pump |
| CN204852495U (en) * | 2015-07-21 | 2015-12-09 | 约翰迪尔（天津）有限公司 | Check valve and including distributor of this check valve |
| CN106917732A (en) * | 2015-12-25 | 2017-07-04 | 罗凤玲 | A kind of pump |
| CN108119675A (en) * | 2018-02-22 | 2018-06-05 | 济南百惠凯希汽车零部件有限公司 | A kind of check valve and the auxiliary braking cylinder using the check valve |
| CA2988315A1 (en) * | 2016-12-06 | 2018-06-06 | PMC Pumps Inc. | Hydraulically actuated double-acting positive displacement pump system for producing fluids from a deviated wellbore |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040173271A1 (en) * | 2003-03-03 | 2004-09-09 | Nance Stephen Keith | Quick connect chemical injector |
-
2018
- 2018-06-12 CN CN201810603782.6A patent/CN108644105B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035025U (en) * | 1988-04-09 | 1989-03-29 | 李明成 | Sealing device for the piston of driving pump of a hydraulic jack |
| CN2035814U (en) * | 1988-07-25 | 1989-04-12 | 江苏省南通县液压机械厂 | Hand-pushing hydraulic intensifier |
| JP2001341659A (en) * | 2000-05-31 | 2001-12-11 | Koyo Seiko Co Ltd | Damper valve and hydraulic power steering device using it |
| CN101469786A (en) * | 2007-12-29 | 2009-07-01 | 上海立新液压有限公司 | Non-return valve with valve housing |
| CN102686883A (en) * | 2009-12-23 | 2012-09-19 | 罗伯特·博世有限公司 | Piston pump for a hydraulic vehicle braking system |
| CN102200193A (en) * | 2010-05-24 | 2011-09-28 | 浙江万向精工有限公司 | Plunger pump check valve |
| CN201757042U (en) * | 2010-07-30 | 2011-03-09 | 冯振强 | Reciprocating plunger pump |
| CN103052834A (en) * | 2010-08-19 | 2013-04-17 | 罗伯特·博世有限公司 | Valve, in particular of a hydraulic piston pump |
| CN202597788U (en) * | 2012-03-28 | 2012-12-12 | 浙江澳川液压器材有限公司 | Hydraulic check valve |
| CN103850833A (en) * | 2012-12-03 | 2014-06-11 | 马涅蒂-马瑞利公司 | Fuel supply pump |
| CN104405604A (en) * | 2014-10-20 | 2015-03-11 | 浙江大学 | Ultrahigh-pressure axial plunger pump |
| CN204852495U (en) * | 2015-07-21 | 2015-12-09 | 约翰迪尔（天津）有限公司 | Check valve and including distributor of this check valve |
| CN106917732A (en) * | 2015-12-25 | 2017-07-04 | 罗凤玲 | A kind of pump |
| CA2988315A1 (en) * | 2016-12-06 | 2018-06-06 | PMC Pumps Inc. | Hydraulically actuated double-acting positive displacement pump system for producing fluids from a deviated wellbore |
| CN108119675A (en) * | 2018-02-22 | 2018-06-05 | 济南百惠凯希汽车零部件有限公司 | A kind of check valve and the auxiliary braking cylinder using the check valve |
Non-Patent Citations (1)
| Title |
|---|
| 一种多功能阀在轴向柱塞变量泵与定量马达闭式***中的应用;万汉驰;建筑机械(11);全文 * |
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