CN111173985A - Electro-hydraulic proportional valve - Google Patents
Electro-hydraulic proportional valve Download PDFInfo
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- CN111173985A CN111173985A CN201911350032.3A CN201911350032A CN111173985A CN 111173985 A CN111173985 A CN 111173985A CN 201911350032 A CN201911350032 A CN 201911350032A CN 111173985 A CN111173985 A CN 111173985A
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
- F16K31/082—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet using a electromagnet and a permanent magnet
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B13/0446—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors with moving coil, e.g. voice coil
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides an electro-hydraulic proportional valve, which belongs to the technical field of hydraulic transmission and comprises a valve body, a valve core, a connecting block, a shell, a moving coil, a circuit board and a reset mechanism, wherein the valve body is provided with a valve core and a valve core; the valve core is arranged in the valve body in a sliding manner; the connecting block is fixedly arranged at one end of the valve body; the connecting block is provided with an installation space; the shell is fixedly arranged at one end of the connecting block, which is far away from the valve body; a magnet is arranged in the shell; the moving coil is arranged in the shell in a sliding manner and sleeved outside the magnet; one end of the moving coil is provided with a fixed end which extends into the installation space and is fixedly connected with the valve core; the electro-hydraulic proportional valve provided by the invention has the advantages that the reset mechanism is started to adjust the valve core to slide to a zero position in the valve body, and the normal movement of the valve core in the valve body cannot be influenced by the elastic connection of the reset mechanism and the valve core, so that errors generated in the manufacturing and assembling processes are eliminated, and the control precision of the electro-hydraulic proportional valve is improved.
Description
Technical Field
The invention belongs to the technical field of hydraulic transmission, and particularly relates to an electro-hydraulic proportional valve.
Background
The electro-hydraulic proportional valve is strong in anti-pollution capacity and low in price, and gradually replaces the application of a servo valve in industrial production, but due to the difference of manufacturing, adjusting and assembling, a valve core and a valve body can generate certain zero offset after being installed in a matched mode, so that the characteristics of the electro-hydraulic proportional valve such as precision are greatly reduced, and production accidents can occur in severe cases.
Disclosure of Invention
The invention aims to provide an electro-hydraulic proportional valve, which aims to solve the technical problem that in the prior art, the precision of the electro-hydraulic proportional valve is reduced due to zero offset of a valve core caused by errors such as installation and manufacturing.
In order to achieve the purpose, the invention adopts the technical scheme that: providing an electro-hydraulic proportional valve comprising:
the valve body is internally provided with a plurality of flow passages;
the valve core is arranged in the valve body in a sliding mode and used for changing the on-off state of each flow channel;
the connecting block is fixedly arranged at one end of the valve body; the connecting block is provided with an installation space;
the shell is fixedly arranged at one end of the connecting block, which is far away from the valve body; a magnet is arranged in the shell;
the moving coil is arranged in the shell in a sliding mode and sleeved outside the magnet; one end of the moving coil is provided with a fixed end which extends into the installation space and is fixedly connected with the valve core;
the circuit board is provided with a central hole and is positioned between the connecting block and the shell; the circuit board is provided with a protruding part protruding out of one side of the shell, and the protruding part is used for being connected with a power supply;
and the resetting mechanism is fixedly arranged at the other end of the valve body, is elastically connected with the valve core and is used for adjusting the position of the valve core.
As another embodiment of this application, the connecting block is kept away from be equipped with the annular flange on the terminal surface of shell, the annular flange is installed with the valve body cooperation, the connecting block is kept away from the one end of annular flange be equipped with fixed end sliding connection's sliding hole, the annular flange encloses into installation space, installation space with the sliding hole intercommunication.
As another embodiment of this application, be equipped with on the connecting block and be used for spacing installation the spacing groove of circuit board, the degree of depth of spacing groove is not more than the thickness of circuit board.
As another embodiment of the present application, the fixing tip includes:
one end of the extension rod is fixed on the movable ring, and the other end of the extension rod extends into the installation space;
the end part is fixed on the other end of the extension rod; one end of the end part, which is far away from the extension rod, is provided with a mounting hole, and the outer side surface of the end part is provided with a first connecting hole which penetrates through the mounting hole; one end of the valve core is provided with a second connecting hole corresponding to the first connecting hole, and the valve core is fixedly connected with the end part through a pin shaft.
As another embodiment of the present application, a first through hole is formed in an outer side surface of the valve element, and a second through hole communicated with the first through hole is formed in one end of the valve element, which extends into the mounting hole; and a third through hole communicated with the mounting hole is formed in the outer side surface of the extension rod.
As another embodiment of the present application, the reset mechanism includes:
the block body is fixedly connected with the valve body; the block body is provided with a threaded hole;
the outer circle surface of the extrusion rod is provided with an external thread matched with the threaded hole; one end of the valve core penetrates through the threaded hole to correspond to the valve core;
and the elastic piece is arranged between the extrusion rod and the valve core and is used for extruding and resetting the valve core.
As another embodiment of the present application, one end of the pressing rod is provided with a receiving groove for mounting the elastic member.
As another embodiment of the application, one end of the block body, which is far away from the valve core, is provided with a sealing end cover.
As another embodiment of the present application, a limit sealing plate is disposed in the housing, and the moving coil slides between the limit sealing plate and the bottom surface of the housing; the outer circle surface of the limiting sealing plate is provided with a first sealing ring matched with the inner wall of the shell, and one end, close to the connecting block, of the limiting sealing plate is provided with a second sealing ring matched with the connecting block.
As another embodiment of the present application, two wiring holes corresponding to the circuit board are formed in the limiting sealing plate, and two ends of the coil on the moving coil respectively penetrate through the corresponding wiring holes to be connected with the circuit board.
The electro-hydraulic proportional valve provided by the invention has the beneficial effects that: compared with the prior art, the electro-hydraulic proportional valve has the advantages that the moving coil is installed in the shell, the magnet is sleeved on the moving coil, the valve core is installed in the valve body, then the shell, the circuit board, the connecting block, the valve body and the reset mechanism are installed together in sequence, then the valve body is installed on a hydraulic system, the welding disc on the protruding part of the circuit board is connected with a power supply to control the moving coil, and the valve core is driven by the fixed end head to slide in the valve body, so that parameters such as flow of the hydraulic system are controlled; according to the basic parameters of the electro-hydraulic proportional valve compared with data such as a flow meter on a hydraulic system, the reset mechanism is started to adjust the sliding of the valve core in the valve body to a zero position, and the reset mechanism is elastically connected with the valve core without influencing the normal movement of the valve core in the valve body.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an electro-hydraulic proportional valve provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a valve cartridge and a fixed head connection provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first connection hole and a second connection hole provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a circuit board and a connection block according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1. a valve body; 2. a valve core; 21. a second connection hole; 22. a first through hole; 23. a second through hole; 3. connecting blocks; 31. an installation space; 32. an annular flange; 33. a slide hole; 34. a limiting groove; 4. a housing; 41. a magnet; 42. a limit sealing plate; 421. a first seal ring; 422. a second seal ring; 423. a wiring hole; 5. moving coils; 51. fixing the end head; 511. an extension rod; 512. an end portion; 513. mounting holes; 514. a first connection hole; 515. a pin shaft; 516. a third through hole; 517. soldering tin; 6. a circuit board; 61. a central bore; 62. a projection; 7. a reset mechanism; 71. a block body; 711. a threaded hole; 72. an extrusion stem; 73. an elastic member; 74. mounting grooves; 75. and sealing the end cover.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the electro-hydraulic proportional valve provided by the present invention will now be described. An electro-hydraulic proportional valve comprises a valve body 1, a valve core 2, a connecting block 3, a shell 4, a moving coil 5, a circuit board 6 and a reset mechanism 7; a plurality of flow passages are arranged in the valve body 1; the valve core 2 is arranged in the valve body 1 in a sliding manner and used for changing the on-off state of each flow channel; the connecting block 3 is fixedly arranged at one end of the valve body 1; the connecting block 3 is provided with a mounting space 31; the shell 4 is fixedly arranged at one end of the connecting block 3 far away from the valve body 1; a magnet 41 is arranged in the shell 4; the moving coil 5 is arranged in the shell 4 in a sliding manner and sleeved outside the magnet 41; one end of the moving coil 5 is provided with a fixed end 51 which extends into the installation space 31 and is fixedly connected with the valve core 2; the circuit board 6 is provided with a central hole 61 and is positioned between the connecting block 3 and the shell 4; the circuit board 6 is provided with a convex part 62 which protrudes out of one side of the shell 4, and the convex part 62 is used for connecting with a power supply; the reset mechanism 7 is fixedly arranged at the other end of the valve body 1, is elastically connected with the valve core 2 and is used for adjusting the position of the valve core 2.
Compared with the prior art, the electro-hydraulic proportional valve provided by the invention has the advantages that the moving coil 5 is installed in the shell 4, the magnet 41 and the valve core 2 are sleeved in the valve body 1, then the shell 4, the circuit board 6, the connecting block 3, the valve body 1 and the reset mechanism 7 are installed together in sequence, then the valve body 1 is installed on a hydraulic system, the pad on the protruding part 62 of the circuit board 6 is arranged to be connected with a power supply to control the moving coil 5, and then the valve core 2 is driven by the fixed end 51 to slide in the valve body 1, so that parameters such as flow rate of the hydraulic system can be controlled; according to the basic parameters of the electro-hydraulic proportional valve compared with data such as a flow meter on a hydraulic system, the resetting mechanism 7 is started to adjust the valve core 2 to slide to a zero position in the valve body 1, and the resetting mechanism 7 is elastically connected with the valve core 2 without influencing the normal movement of the valve core 2 in the valve body 1.
Referring to fig. 1, as a specific embodiment of the electro-hydraulic proportional valve provided by the present invention, an annular flange 32 is disposed on an end surface of the connecting block 3 away from the housing 4, the annular flange 32 is installed in cooperation with the valve body 1, a sliding hole 33 slidably connected to a fixed end 51 is disposed at an end of the connecting block 3 away from the annular flange 32, the annular flange 32 surrounds an installation space 31, the installation space 31 is communicated with the sliding hole 33, the annular flange 32 and the end surface of the connecting block 3 form the installation space 31, the fixed end 51 slidably penetrates through the sliding hole 33 and enters the installation space 31, a central hole 61 for the fixed end 51 to penetrate through is disposed on the circuit board 6, and the central hole 61 and the sliding hole 33 are concentrically disposed. Set up mounting groove 74 on the terminal surface of valve body 1, the centre bore 61 of valve body 1 is connected with the tank bottom of mounting groove 74, and annular flange 32 sliding fit plays the limiting displacement to connecting block 3 in mounting groove 74.
Referring to fig. 1 and 4, as a specific embodiment of the electro-hydraulic proportional valve provided by the present invention, a limiting groove 34 for limiting the installation of the circuit board 6 is formed on the connecting block 3, the depth of the limiting groove 34 is not greater than the thickness of the circuit board 6, an opening communicated with the limiting groove 34 is formed on the outer side surface of the connecting block 3, when the circuit board 6 is installed in the limiting groove 34, the body of the circuit board 6 is installed in cooperation with the limiting groove 34, and the protrusion 62 is installed in cooperation with the opening and protrudes out of the connecting block 3, so as to stably limit the circuit board 6 in the limiting groove 34. Through this kind of mode, it is comparatively convenient, simple with the installation of shell 4, circuit board 6 and connecting block 3, guaranteed again that circuit board 6 can not squint in the installation, ensures the stability that coil and circuit board 6 are connected. The circuit board 6 and the projecting portion 62 are integrally formed, which facilitates production and mounting. After the coil is soldered to the circuit board 6, the circuit board 6 is mounted to the limiting groove 34.
Referring to fig. 2 and fig. 3, as an embodiment of the electro-hydraulic proportional valve provided by the present invention, the fixed end 51 includes an extension rod 511 and an end 512, one end of the extension rod 511 is fixed on the moving coil 5, and the other end of the extension rod 511 extends into the installation space 31; the end 512 is fixed on the other end of the extension rod 511; a mounting hole 513 is formed at one end of the end part 512 far away from the extension rod 511, and a first connecting hole 514 penetrating through the mounting hole 513 is formed on the outer side surface of the end part 512; one end of the valve core 2 is provided with a second connecting hole 21 corresponding to the first connecting hole 514, the valve core 2 is fixedly connected with the end part 512 through a pin 515, an extension rod 511 is fixed at one end of the moving coil 5 and extends outwards to pass through the central hole 61 and the sliding hole 33 to enter the mounting space 31, the end part 512 is fixed on the extension rod 511, and a mounting hole 513 is arranged at the end part 512, so that the valve core 2 is mounted in the mounting hole 513, the first connecting hole 514 corresponds to the second connecting hole 21, and the pin 515 is used for passing through the first connecting hole 514 and the second connecting hole 21 to fix the valve core 2 and the end part 512 together, thereby achieving the purpose of driving the valve core 2 to move. The extension rod 511, the end portion 512 and the moving coil 5 are integrally formed, so that the three components can effectively and stably transmit power. After the pin 515 is connected, the pin 515 and the end 512 are soldered with solder 517, which makes the pin 515 more stable.
Referring to fig. 1 to 3, as a specific embodiment of the electro-hydraulic proportional valve provided by the present invention, a first through hole 22 is formed on an outer side surface of the valve core 2, and a second through hole 23 communicated with the first through hole 22 is formed at one end of the valve core 2 extending into the mounting hole 513; the outer side surface of the extension rod 511 is provided with a third through hole 516 communicated with the mounting hole 513, the outer side surface of the middle part of the valve core 2 is provided with a first through hole 22, the aperture of the first through hole 22 is perpendicular to the central axis of the valve core 2, the end surface of the valve core 2 is provided with a second through hole 23 communicated with the first through hole 22, the outer side surface of the extension rod 511 close to the moving coil 5 is provided with a third through hole 516 communicated with the mounting hole 513, and by the mode, a flow channel in the valve body 1 is communicated with the inside of the shell 4, hydraulic oil can enter the mounting hole 513 through the first through hole 22 and the second through hole 23 and flow into the inside of the shell 4 through the third through hole 516 to be contacted with a coil on the moving coil 5, and a large amount of heat energy generated by the coil during working is absorbed, so.
Referring to fig. 1, as a specific embodiment of the electro-hydraulic proportional valve provided by the present invention, the reset mechanism 7 includes a block 71, a pressing rod 72, and an elastic member 73, wherein the block 71 is fixedly connected to the valve body 1; a threaded hole 711 is arranged on the block body 71; the outer circular surface of the extrusion rod 72 is provided with an external thread matched with the threaded hole 711; and one end of the valve body passes through the threaded hole 711 and corresponds to the valve core 2; the elastic piece 73 is arranged between the extrusion rod 72 and the valve core 2 and used for extruding the reset valve core 2, the fifth through holes are formed in four feet of the end face of the block body 71, corresponding screw holes are formed in the end face of the corresponding valve body 1, and the valve body 1 and the block body 71 are fixedly connected through bolts penetrating through the fifth through holes and the screw holes. Grooves are respectively formed in two end faces of the block body 71, the threaded hole 711 penetrates through the two grooves, then the extrusion rod 72 is connected in the threaded hole 711 in a threaded mode, the elastic piece 73 is arranged between the valve body 1 and the extrusion rod 72, the valve core 2 is pressed to move by rotating the extrusion rod 72 and compressing a spring, and the purpose of resetting or zeroing the valve core 2 is achieved. The elastic member 73 is a spring, but one end of the spring is sleeved on a shoulder at one end of the valve core 2 to play a role of limiting the spring. The straight groove or the hexagon socket is formed in the extrusion rod 72, so that a worker can conveniently rotate the extrusion rod 72 by using a screwdriver or a hexagon wrench, and the operation space of the worker is enlarged by the arrangement of the groove. Furthermore, the terms "first", "second", "third", "fourth", "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth", "fifth" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, as a specific embodiment of the electro-hydraulic proportional valve according to the present invention, an accommodating groove for installing an elastic member 73 is formed at one end of an extruding rod 72, a spring is disposed in the accommodating groove, and the spring is limited by an inner groove wall of the accommodating groove, so as to avoid the spring failure caused by the radial bending of the spring. Can set up the base at the tip 512 of extrusion pole 72, on the base was located to the holding tank, the size of base was greater than the size of extrusion pole 72, reduced the radial dimension of extrusion pole 72 effectively, both can alleviate the weight of whole electric power proportional valve, also reduced the size of screw hole 711 simultaneously, the processing of being convenient for, the cost is reduced.
Referring to fig. 1, as a specific embodiment of the electro-hydraulic proportional valve provided by the present invention, a sealing end cover 75 is disposed at one end of the block body 71 away from the valve core 2, and the sealing end cover 75 is disposed to seal the groove and the extrusion rod 72 and the threaded hole 711 in the groove, so as to prevent foreign objects from entering the threaded hole 711 and affecting the normal use of the extrusion rod 72. An internal thread is provided on the inner wall of the groove, an external thread is provided on the end cap 75, and the end cap 75 is screw-mounted on the block 71. The sealing ring can be sleeved on the sealing end cover 75, so that the sealing effect is further improved, and hydraulic oil is prevented from flowing out.
Referring to fig. 1, as a specific embodiment of the electro-hydraulic proportional valve provided by the present invention, a limiting sealing plate 42 is disposed in a housing 4, and a moving coil 5 slides between the limiting sealing plate 42 and a bottom surface of the housing 4; be equipped with the first sealing washer 421 with shell 4 inner wall looks adaptation on the outer disc of spacing closing plate 42, spacing closing plate 42 is close to one of connecting block 3 serve be equipped with the second sealing washer 422 of connecting block 3 looks adaptation, the ring channel is seted up to the inner wall upside at shell 4, spacing closing plate 42 blocks on the ring channel when installing in shell 4, and the cooperation of the outer disc of spacing closing plate 42 is installed, and seal 4 inner walls of shell with the help of first sealing washer 421, prevent that hydraulic oil from flowing along 4 inner walls of shell. And connecting block 3 contact of the upper end of spacing closing plate 42 to under the squeezing action of bolt, second sealing washer 422 and connecting block 3 contact, realize the radial sealed to connecting block 3, prevent that hydraulic oil from leaking out between shell 4 and connecting block 3.
Referring to fig. 1, as a specific embodiment of the electro-hydraulic proportional valve provided by the present invention, two wiring holes 423 corresponding to the circuit board 6 are formed in the limiting sealing plate 42, two ends of the coil on the moving coil 5 respectively pass through the corresponding wiring holes 423 to be connected with the circuit board 6, and since the coil wound on the moving coil 5 needs to be connected with the circuit board 6, so as to provide electric energy for the coil, in order to facilitate the electrical connection of the coil, two wiring holes 423 are formed in the limiting sealing plate 42, and the wiring holes 423 respectively correspond to pads on the circuit board 6, during installation, two ends of the operating coil respectively pass through the two wiring holes 423 and are welded together with the pads, by which the moving coil 5, the limiting sealing plate 42 and the circuit board 6 can be directly positioned and installed together, and the limiting sealing plate 42 can be coated with a material to bond the circuit board 6 and the limiting sealing plate 42. Can set up the rubber tube in wiring hole 423 to the upper and lower end of rubber tube is equipped with the rubber flange that is used for hiding the drill way respectively, avoids the both ends and drill way or the pore wall of coil to take place the contact, and the coil that wears, can lead to the coil short circuit when serious.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Electro-hydraulic proportional valve, characterized by, includes:
the valve body is internally provided with a plurality of flow passages;
the valve core is arranged in the valve body in a sliding mode and used for changing the on-off state of each flow channel;
the connecting block is fixedly arranged at one end of the valve body; the connecting block is provided with an installation space;
the shell is fixedly arranged at one end of the connecting block, which is far away from the valve body; a magnet is arranged in the shell;
the moving coil is arranged in the shell in a sliding mode and sleeved outside the magnet; one end of the moving coil is provided with a fixed end which extends into the installation space and is fixedly connected with the valve core;
the circuit board is provided with a central hole and is positioned between the connecting block and the shell; the circuit board is provided with a protruding part protruding out of one side of the shell, and the protruding part is used for being connected with a power supply;
and the resetting mechanism is fixedly arranged at the other end of the valve body, is elastically connected with the valve core and is used for adjusting the position of the valve core.
2. The electro-hydraulic proportional valve of claim 1, wherein an annular flange is arranged on an end face of the connecting block away from the housing, the annular flange is installed in cooperation with the valve body, a sliding hole in sliding connection with the fixed end head is formed in one end of the connecting block away from the annular flange, the annular flange surrounds the installation space, and the installation space is communicated with the sliding hole.
3. The electro-hydraulic proportional valve of claim 2, wherein the connecting block is provided with a limiting groove for limiting and mounting the circuit board, and the depth of the limiting groove is not greater than the thickness of the circuit board.
4. The electro-hydraulic proportional valve of claim 1, wherein the fixed head comprises:
one end of the extension rod is fixed on the movable ring, and the other end of the extension rod extends into the installation space;
the end part is fixed on the other end of the extension rod; one end of the end part, which is far away from the extension rod, is provided with a mounting hole, and the outer side surface of the end part is provided with a first connecting hole which penetrates through the mounting hole; one end of the valve core is provided with a second connecting hole corresponding to the first connecting hole, and the valve core is fixedly connected with the end part through a pin shaft.
5. The electro-hydraulic proportional valve of claim 4, wherein a first through hole is formed in the outer side surface of the valve core, and a second through hole communicated with the first through hole is formed in one end, extending into the mounting hole, of the valve core; and a third through hole communicated with the mounting hole is formed in the outer side surface of the extension rod.
6. The electro-hydraulic proportional valve of claim 1, wherein the reset mechanism comprises:
the block body is fixedly connected with the valve body; the block body is provided with a threaded hole;
the outer circle surface of the extrusion rod is provided with an external thread matched with the threaded hole; one end of the valve core penetrates through the threaded hole to correspond to the valve core;
and the elastic piece is arranged between the extrusion rod and the valve core and is used for extruding and resetting the valve core.
7. The electro-hydraulic proportional valve of claim 6, wherein one end of the squeeze lever is provided with a receiving groove for mounting the resilient member.
8. The electro-hydraulic proportional valve of claim 7, wherein an end of the block remote from the spool is provided with a sealing end cap.
9. The electro-hydraulic proportional valve of claim 1, wherein a limit sealing plate is disposed in the housing, and the moving coil slides between the limit sealing plate and the bottom surface of the housing; the outer circle surface of the limiting sealing plate is provided with a first sealing ring matched with the inner wall of the shell, and one end, close to the connecting block, of the limiting sealing plate is provided with a second sealing ring matched with the connecting block.
10. The electro-hydraulic proportional valve according to claim 9, wherein the limiting sealing plate is provided with two wiring holes corresponding to the circuit board, and two ends of the coil on the moving coil respectively penetrate through the corresponding wiring holes to be connected with the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911350032.3A CN111173985B (en) | 2019-12-24 | 2019-12-24 | Electro-hydraulic proportional valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911350032.3A CN111173985B (en) | 2019-12-24 | 2019-12-24 | Electro-hydraulic proportional valve |
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| Publication Number | Publication Date |
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| CN111173985A true CN111173985A (en) | 2020-05-19 |
| CN111173985B CN111173985B (en) | 2021-10-15 |
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| CN201911350032.3A Active CN111173985B (en) | 2019-12-24 | 2019-12-24 | Electro-hydraulic proportional valve |
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| DE3705082A1 (en) * | 1987-02-18 | 1988-09-01 | Geze Gmbh | Solenoid valve |
| JPH11248023A (en) * | 1998-03-05 | 1999-09-14 | Jidosha Kiki Co Ltd | Solenoid |
| CN203686107U (en) * | 2014-01-10 | 2014-07-02 | 杭州腾骅汽车变速器有限公司 | Four-speed, five-speed and six-speed automatic transmission electromagnetic valve |
| CN203757116U (en) * | 2014-02-28 | 2014-08-06 | 北京谊安医疗系统股份有限公司 | Proportional valve |
| CN103867780A (en) * | 2014-04-02 | 2014-06-18 | 中山市思源电器有限公司 | Fuel gas electromagnetism proportional valve |
| CN206092561U (en) * | 2016-09-21 | 2017-04-12 | 涌镇液压机械（上海）有限公司 | Automatically controlled governing valve of stack formula with it is not enough to overcome electromagnetism thrust |
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| CN111173985B (en) | 2021-10-15 |
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