Fluid control valves

Abstract

The present invention provides a fluid control valve, comprising: a valve body having an inner chamber, a fluid inlet provided at one axial end of the valve body, a sidewall of the valve body having a return port and a regulating port connected to the inner chamber, the return port being adjacent to the fluid inlet and the regulating port being distal to the fluid inlet; a valve stem slidably disposed within the valve body, the valve stem including a first end and a second end opposite to each other, the first end being adjacent to the fluid inlet, the valve stem being provided with a first convex ring and a second convex ring in sequence from the first end to the second end, the valve stem having a cavity extending axially along the valve stem, the valve stem having a through hole connected to the cavity between the second convex ring and the second end; a spring; and a driver. The fluid control valve provided by the present invention has the fluid inlet disposed at the axial end of the valve body, and the regulating port and the return port disposed at the side of the valve body. This configuration of the fluid control valve can be applied to an engine block. When applied to an engine block, the oil circuit structure can be simplified and the overall structure of the engine block can be made more compact.

Description

Technical Field

[0001] The present invention relates to the field of fluid control technology, and more particularly, to a fluid control valve. Background Art

[0002] Fluid control valves have been widely used in the field of fluid control, such as oil pump control valves. Oil pump control valves can control the pressure and flow of lubricating oil output by the engine oil pump, delivering lubricating oil to various parts of the engine, thereby reducing frictional resistance, reducing wear on relatively moving parts, and removing heat from moving parts. Common fluid control valves include a valve body, a valve stem, a solenoid, and a spring. The valve body is provided with multiple fluid ports. The valve stem can be positioned at different positions within the valve body under the action of the solenoid and spring, thereby controlling the connection between different fluid ports and the inner cavity of the valve body. Common fluid control valves have a fluid inlet in the middle of the valve, a return port at the end of the valve body, and a regulating port between the fluid inlet and the return port. Due to structural design limitations, fluid control valves using this structure occupy a large overall space in the corresponding engine cylinder block, and the oil circuit layout is complex, making it difficult to meet user application requirements. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a fluid control valve to solve the technical problem in the prior art that the overall space occupied by the engine cylinder is large and it is difficult to meet application requirements.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a fluid control valve, comprising:

[0005] A valve body having an inner chamber, a fluid inlet being provided at one axial end of the valve body, a reflux port and a regulating port being provided on a side wall of the valve body and communicating with the inner chamber, the reflux port being close to the fluid inlet and the regulating port being away from the fluid inlet;

[0006] a valve stem slidably disposed within the valve body, the valve stem comprising a first end and a second end opposite to each other, the first end being proximate to the fluid inlet, the valve stem being provided with a first convex ring and a second convex ring in sequence from the first end to the second end, the valve stem having an interior defining a cavity extending axially along the valve stem, and the valve stem defining a through hole communicating with the cavity between the second convex ring and the second end;

[0007] a spring disposed in the valve body, wherein both ends of the spring respectively abut against an end of the valve body close to the fluid inlet and the first end of the valve stem and are in a compressed state; and

[0008] The driver is arranged at the other axial end of the valve body, and the driver includes a plunger and a driving assembly. The driving assembly can drive the plunger to slide along the axial direction of the valve stem to drive the valve stem to move axially in the valve body.

[0009] In some embodiments, the valve body is provided with a filter element at the fluid inlet, and the filter element is provided with a plurality of elastic clamping portions at intervals along the circumferential direction, and the inner wall surface of the valve body is provided with a mounting groove for the elastic clamping portion to be clamped into, and the filter element is elastically clamped in the valve body by the elastic clamping portion; the mounting groove is a first annular groove, and the elastic clamping portion is a spring plate provided on the periphery of the filter element, and the spring plate extends in a direction away from the valve stem; the filter element is a roughly circular filter screen; the filter screen includes a first area with a plurality of filter holes and a second area provided outside the first area, and the filter screen is provided with a plurality of notches evenly spaced circumferentially in the second area, and each of the notches is provided with a spring plate, and a part of the spring plate extends radially outward from the notch.

[0010] In some embodiments, the spring piece includes a large diameter end and a small diameter end connected to each other, the width of the large diameter end is greater than the width of the small diameter end, one end of the small diameter end is connected to the filter screen, and the end of the large diameter end away from the small diameter end is elastically stuck in the mounting groove.

[0011] In some embodiments, the cross section of the elastic sheet parallel to the thickness direction thereof is T-shaped, and the side of the elastic sheet abutting against the wall of the first annular groove is arc-shaped.

[0012] In some embodiments, the valve body is provided with an end plug at the fluid inlet, the end plug is threadedly connected to the valve body, and the end plug is provided with a hole extending through itself in the axial direction; the spring abuts against the end plug; the inner wall of the valve body near the fluid inlet is provided with an annular step, and the inner wall surface of the valve body is provided with two opposite grooves, and the grooves extend to the step surface of the annular step that is radially parallel to the valve body; after the end plug is screwed into a preset position in the valve body, the outer peripheral wall of the end plug is extended and stuck into the grooves on both sides by mechanical deformation.

[0013] In some embodiments, a second annular groove is circumferentially provided on an outer wall of the first protruding ring and / or an outer wall of the second protruding ring.

[0014] In some embodiments, the driver further includes a sleeve and a stopper, the plunger is slidably disposed in the sleeve, and the stopper is disposed at one end of the driver adjacent to the valve body; one end of the stopper extends into the sleeve, and the stopper is used to limit the maximum sliding stroke of the plunger toward the valve body, and the valve stem slides through the stopper and abuts against the plunger; the outer wall of the valve body, the connection gap between the stopper and the valve body, and the connection gap between the stopper and the sleeve are all provided with sealing rings.

[0015] In some embodiments, a fixing rod is provided between the second end of the valve stem and the plunger, one end of the fixing rod is connected to the plunger, and the other end of the fixing rod slides through the stopper and contacts the valve stem, and the valve stem, the fixing rod and the plunger are coaxially arranged; a plurality of guide grooves are provided at intervals on the circumferential surface of the plunger, and an extension direction of the guide grooves is parallel to the axial direction of the plunger, and the guide grooves extend from the head to the tail of the plunger.

[0016] In some embodiments, a magnetic isolation sleeve is provided on one end of the stopper close to the plunger.

[0017] In some embodiments, the drive assembly includes a shell, and a first magnetic pole block, a second magnetic pole block, a skeleton, a coil and a sealing layer arranged in the shell; the first magnetic pole block and the second magnetic pole block are axially spaced apart in the shell and are located on the periphery of the sleeve, the first magnetic pole block is fixedly connected to the end of the valve body away from the fluid inlet, the skeleton is arranged on the periphery of the first magnetic pole block and the second magnetic pole block, the coil is wound on the skeleton, and the sealing layer covers the coil and the skeleton.

[0018] In some embodiments, a radially extending flange is provided on an inner wall of the valve body near one end of the fluid inlet, and one end of the spring abuts against the flange.

[0019] In some embodiments, the first convex ring is provided at the end of the first end of the valve stem, the first convex ring is hollow and forms an inner cavity, and the other end of the spring is abutted against the inner cavity of the first convex ring.

[0020] Compared with the prior art, in the fluid control valve provided by the embodiment of the present invention, the fluid inlet is arranged at the axial end of the valve body, and the regulating port and the return port are arranged on the side of the valve body. The fluid control valve with this configuration can be applied to an engine block. When applied to an engine block, the oil circuit structure can be simplified, and the overall structure of the engine block can be made more compact. A first convex ring, a second convex ring, and a through hole are provided on the valve stem. When the pressure difference formed between the first convex ring and the second convex ring changes, the valve stem moves in the inner chamber of the valve body. Then, in conjunction with the push of the driver and the spring on the valve stem, the position of the first convex ring and the second convex ring changes, thereby changing the connection state between the various fluid ports, thereby achieving control of the fluid flow rate and flow rate. The overall structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A perspective view of a fluid control valve provided in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A cross-sectional view of the fluid control valve shown;

[0024] Figure 3 for Figure 1 An exploded view of the fluid control valve shown;

[0025] Figure 4 for Figure 3 A perspective view of a valve stem in the fluid control valve shown;

[0026] Figure 5 for Figure 2 A magnified schematic diagram of part A in the middle;

[0027] Figure 6 for Figure 3 A perspective view of a filter screen in the fluid control valve shown;

[0028] Figure 7 for Figure 6 a side view of the filter shown;

[0029] Figure 8 for Figure 1 A partial exploded view of the fluid control valve shown;

[0030] Figure 9 A partial cross-sectional view of a fluid control valve provided in accordance with another embodiment of the present invention.

[0031] Among them, the reference numerals in the figures are:

[0032] 10-valve body; 100-inner chamber; 101-fluid inlet; 102-return port; 103-regulating port; 11-mounting groove; 13-annular step; 14-groove; 15-flange; 150-accommodating groove; 16-filter bracket;

[0033] 20 - valve stem; 201 - first end; 202 - second end; 203 - cavity; 204 - through hole; 21 - first convex ring; 22 - second convex ring; 23 - fixing rod; 210 - inner cavity; 211 - second annular groove;

[0034] 30-spring;

[0035] 40-driver; 41-plunger; 42-drive assembly; 43-sleeve; 44-stopper; 45-sealing ring; 46-magnetic isolation sleeve; 410-guiding groove; 411-fixing groove; 420-housing; 421-first magnetic pole piece; 422-second magnetic pole piece; 423-skeleton; 424-coil; 425-sealing layer; 4210-first pole shoe; 4211-first positioning portion; 4212-connecting portion; 4220-second pole shoe; 4221-second positioning portion; 430-clamping portion;

[0036] 50 - filter element; 52 - elastic holding portion; 54 - filter hole; 55 - first area; 56 - second area; 57 - notch; 58 - large diameter end; 59 - small diameter end;

[0037] 60-end plug; 61-end plug hole. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, 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 only used to explain the present invention and are not intended to limit the present invention.

[0039] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] Please also refer to Figures 1 to 4The fluid control valve provided in an embodiment of the present invention will now be described. The fluid control valve includes a valve body 10, a valve stem 20, a spring 30, and an actuator 40. The valve body 10 is hollow and generally cylindrical, with an inner chamber 100. A fluid inlet 101 is provided at one axial end of the valve body 10, employing an end-to-end fluid supply method. The sidewall of the valve body 10 is provided with a return port 102 and a regulating port 103, both communicating with the inner chamber 100. The return port 102 is located near the fluid inlet 101, while the regulating port 103 is located away from the fluid inlet 101. The fluid inlet 101 is connected to a high-pressure fluid source, such as the outlet of an oil pump or the main oil gallery of an engine. The regulating port 103 is connected to a control port of the high-pressure fluid source, such as an oil pump, for adjusting the pressure and flow rate of the fluid source. The return port 102 can be connected to a fuel tank via a return pipe. The valve stem 20 is slidably disposed within the inner chamber 100 of the valve body 10 and can slide back and forth axially within the inner chamber 100. Since the fluid inlet 101 is provided at the axial end of the valve body 10 , when the fluid control valve is applied to an engine block, the fluid control valve can be arranged transversely, making the engine block structure more compact and occupying less space overall.

[0043] The valve stem 20 includes a first end 201 and a second end 202, with the first end 201 being closer to the fluid inlet 101 and the second end 202 being further away from the fluid inlet 101. The valve stem 20 is provided with a first raised ring 21 and a second raised ring 22, sequentially extending from the first end 201 to the second end 202. The valve stem 20 defines a cavity 203 extending axially along the valve stem 20. A through hole 204 is defined between the second raised ring 22 and the second end 202, connecting the cavity 203. Multiple through holes 204 may be provided, such as through holes 204 defined on opposite sidewalls of the valve stem 20, or three, four, or more through holes 204 may be defined circumferentially and evenly spaced along the sidewalls of the valve stem 20. The diameters of the first protruding ring 21 and the second protruding ring 22 can be the same or different, and both are substantially equal to the inner diameter of the corresponding portion of the inner chamber 100 of the valve body 10. The first protruding ring 21 and the second protruding ring 22 slide and tightly fit against the inner wall of the valve body 10, preventing a large amount of fluid from passing through while allowing only a small amount of fluid to leak through. The fluid flowing within the valve body 10 lubricates the inner wall of the valve body 10 and the valve stem 20, thereby reducing friction between the first and second protruding rings 21, 22, and the inner wall of the valve body 10 when the valve stem 20 moves.

[0044] The spring 30 is compressed and housed within the valve body 10. Its two ends respectively abut against the end plug 60 at the end of the valve body 10 near the fluid inlet 101 and the first end 201 of the valve stem 20. In this embodiment, a first protruding ring 21 is provided at the distal end of the first end 201. The first protruding ring 21 is hollow and has an inner cavity. One end of the spring 30 is housed and abuts against the first protruding ring 21. This reduces the axial length after assembly, resulting in a smaller overall axial length and a more compact structure.

[0045] The driver 40 is provided at one end of the valve body 10 away from the fluid inlet 101. The driver 40 includes a plunger 41 and a drive assembly 42. The plunger 41 is fixed relatively to the second end 202 of the valve stem 20, and the valve stem 20 can directly abut the plunger 41 or abut the plunger 41 through the fixing rod 23. The drive assembly 42 is used to drive the plunger 41 to slide along the axial direction of the valve stem 20, thereby driving the valve stem 20 to move axially in the valve body 10. When the driver 40 drives the valve stem 20 to move, the positions of the first convex ring 21 and the second convex ring 22 change, thereby changing the connection state between the fluid ports, thereby achieving regulation of the fluid. The fluid referred to in this embodiment is not limited to liquids, such as hydraulic oil or other fluids, but can also be gas.

[0046] The valve stem 20 can move between a first position and a second position within the valve body 10. When the valve stem 20 is in the first position, the first protruding ring 21 is located between the fluid inlet 101 and the return port 102, preventing fluid from communicating between the fluid inlet 101 and the return port 102. The second protruding ring 22 is located between the regulating port 103 and the second end 202 of the valve stem 20. The fluid inlet 101 communicates with the inner cavity 100 via the through-hole 204, and the regulating port 103 communicates with the return port 102. When the valve stem 20 is in the second position, the first protruding ring 21 is located between the fluid inlet 101 and the return port 102, and the second protruding ring 22 is located between the return port 102 and the regulating port 103. The fluid inlet 101 communicates with the regulating port 103 via the through-hole 204.

[0047] Specifically, the fluid enters the inner chamber 100 of the valve body 10 from the fluid inlet 101 and reaches the rear cavity. The pressure formed by the fluid acts on the first convex ring 21 and the second convex ring 22 of the valve stem 20 at the same time. Due to the different cross-sectional areas of the two convex rings, a pressure difference is formed between the working surfaces of the two convex rings, thereby pushing the valve stem 20 to move to the left (for the convenience of description, the present invention is described with reference to the directions in the associated drawings, but it can be understood that the description of the specific orientation should not be understood as any limitation to the present invention), and the spring 30 is compressed; when the fluid pressure reaches the safety regulating pressure, the first convex ring 21 is located on the left side of the return port 102, and the second convex ring 22 is located on the left side of the regulating port 103. The fluid inlet 101 and the regulating port 103 are connected, and the return port 102 and the regulating port 103 are closed. The pressurized fluid enters from the fluid inlet 101 and flows out of the regulating port 103 through the through hole 204 of the valve stem 20.

[0048] When the pressure of the fluid decreases, the fluid pressure on the valve stem 20 decreases, the pressure difference between the first protruding ring 21 and the second protruding ring 22 decreases, and the valve stem 20 moves to the right under the push of the spring 30; when the pressure is lower than the safety regulation pressure, the first protruding ring 21 is located on the left side of the return port 102, and the second protruding ring 22 is located on the right side of the regulating port 103, the connection between the fluid inlet 101 and the regulating port 103 is cut off, and the return port 102 and the regulating port 103 are connected, so that the fluid in the regulating port 103 can flow out through the return port 102. In other words, by controlling the opening size of the connection between the fluid inlet 101 and the regulating port 103, the pressure or flow of the fluid at the regulating port 103 can be controlled.

[0049] The driver 40 can specifically be a solenoid. When the solenoid is not energized, no induced magnetic field is generated, the plunger 41 does not move to the left, and the valve stem 20 does not move to the left either. When the solenoid is energized, the plunger 41 is driven to move to the left, and the valve stem 20 moves to the left. The first convex ring 21 and the second convex ring 22 also move to the left, thereby changing the area blocked by the second convex ring 22 on the regulating port 103, adjusting the opening of the regulating port 103, and adjusting the size of the opening of the connection between the fluid inlet 101 and the regulating port 103. When the solenoid is energized and then de-energized, the valve stem 20, which has moved left, moves to the right under the push of the spring 30, and the opening of the regulating port 103 decreases until the fluid inlet 101 and the regulating port 103 are closed, and the reflux port 102 is connected to the regulating port 103.

[0050] Compared with the prior art, the fluid control valve provided by the present invention has a fluid inlet 101 disposed at the axial end of the valve body 10, and a regulating port 103 and a return port 102 disposed at the side of the valve body 10. This configuration of the fluid control valve can be applied to an engine block. When applied to an engine block, the oil circuit structure can be simplified, and the overall structure of the engine block can be made more compact. A first convex ring 21, a second convex ring 22, and a through hole 204 are disposed on the valve stem 20. When the pressure difference formed between the first convex ring 21 and the second convex ring 22 changes, the valve stem 20 moves in the inner chamber 100 of the valve body 10. Combined with the push of the driver 40 and the spring 30 on the valve stem 20, the positions of the first convex ring 21 and the second convex ring 22 change, thereby changing the connection state between the fluid ports, thereby achieving control of the fluid flow rate and flow rate. The overall structure is simple and the cost is low.

[0051] See also Figure 2 、 Figure 3 and Figure 5The valve body 10 is provided with a filter element 50 at the fluid inlet 101, which is used to filter the fluid flowing into the valve body 10 from the fluid inlet 101, so as to prevent larger metal particles from entering the valve body 10 and hindering the movement of the valve stem 20. Filter elements can also be provided at the regulating port 103 and the return port 102, respectively. The regulating port 103 can be provided with a filter bracket 16 for installing the filter element, or the filter element can be directly installed. The filter element 50 is provided with a plurality of elastic clamping portions 52 at intervals along the circumference. The elastic clamping portions 52 can be, but are not limited to, elastic claws or springs. Preferably, the elastic clamping portions 52 are integrally formed with the filter element 50, such as by stamping or other processing methods.

[0052] The inner wall of the valve body 10 is provided with a mounting groove 11 for the elastic retaining portion 52 to engage. The filter element 50 is elastically secured within the valve body 10 by the elastic retaining portion 52. The use of an elastic retaining connection to install the filter element 50 within the valve body 10 eliminates complex installation steps, reduces installation difficulty, and facilitates quick assembly of the filter element 50.

[0053] Preferably, the mounting groove 11 is a first annular groove, and the elastic retaining portion 52 is a spring plate provided on the periphery of the filter element 50, extending in a direction away from the valve stem 20. Compared to the method of providing multiple grooves, the mounting groove 11 in this embodiment is an annular groove. When installing the filter element 50, there is no need to worry about aligning the elastic retaining portion 52 with the corresponding groove. The filter element 50 can be pressed into the valve body 10, eliminating the need for alignment and installation operations, further reducing the difficulty of installation and facilitating installation.

[0054] See also Figure 2 and Figures 5 to 7 Specifically, the filter element 50 in this embodiment is a filter screen. The filter screen is roughly circular and can be made of a thin plate. The filter screen includes a first area 55 provided with a plurality of filter holes 54 and a second area 56 provided on the periphery of the first area 55, that is, the first area 55 has a plurality of filter holes 54, and the second area 56 has no filter holes. The area ratio of the first area 55 and the second area 56 can be set according to actual application requirements. The filter screen is provided with a plurality of notches 57 evenly spaced in the circumferential direction of the second area 56, and each notch 57 is provided with a spring piece, and a part of the spring piece extends radially outward from the notch 57, so that only a part of the spring piece is elastically stuck with the groove wall of the first annular groove, and the other parts of the periphery of the filter screen will not contact the groove wall of the first annular groove.

[0055] The spring clip includes a connected large-diameter end 58 and a small-diameter end 59. The large-diameter end 58 is wider than the small-diameter end 59. One end of the small-diameter end 59 is connected to the filter screen, and the end of the large-diameter end 58, remote from the small-diameter end 59, is elastically snapped into the mounting groove 11. This means that the width of the spring clip is smaller on the inside and larger on the outside. It is understood that the spring clip can have a gradually changing width, with its width gradually increasing from the small-diameter end 59 to the large-diameter end 58. This allows the spring clip to easily deform at the small-diameter end 59 when subjected to force, facilitating the elastic snapping of the filter screen into the valve body 10. Alternatively, the spring clip can have a non-gradually changing width, such as a uniform width at the small-diameter end 59 and a uniform width at the large-diameter end 58, with the large-diameter end 58 being wider than the small-diameter end 59. Alternatively, the spring clip can have a stepped width, with its width gradually changing from the small-diameter end 59 to the large-diameter end 58.

[0056] The cross section of the spring piece parallel to its thickness direction is T-shaped. Specifically, in this embodiment, the filter screen is manufactured by stamping, that is, a circular thin plate is punched and then the filter screen, the notch 57 and the spring piece are processed. The manufacturing process of the filter screen is simple and the cost is low. Preferably, the side of the T-shaped spring piece where the large diameter end 58 abuts against the wall of the first annular groove can be set to an arc shape, and the side can be set to a circular arc shape, and its curvature radius is less than or equal to the curvature radius of the first annular groove. The corner at the entrance of the first annular groove can be chamfered, that is, the corner has a smooth transition, so that the large diameter end 58 of the spring piece can be more smoothly inserted into the first annular groove.

[0057] It is understandable that the spring piece can also be replaced by an elastic claw, which is provided at the notch 57. The elastic claw is tilted toward the side away from the valve stem 20. The end of the elastic claw away from the filter has a bent portion for engaging with the first annular groove, and the bent portion extends in a direction away from the valve stem 20. After the filter is pressed into the valve body 10, the bent portion engages with the first annular groove and abuts against the groove wall of the first annular groove, thereby achieving elastic mounting of the filter in the valve body 10.

[0058] An annular step 13 is provided on the inner wall of the valve body 10 near the fluid inlet 101, specifically, on the inner wall at the front end of the valve body 10. One end of the first annular groove extends to the annular step 13, which serves to limit the maximum depth of the filter mesh within the valve body 10. It is understood that, after being inserted into the valve body 10, the filter mesh may not contact the annular step 13, but rather may be spaced apart from it. Alternatively, the filter mesh may abut against the annular step 13.

[0059] Preferably, the inner wall of the valve body 10 can be designed with a smooth transition at the corner of the fluid inlet 101 at the front end, which facilitates the smooth press-fit installation of the filter into the valve body 10. The filter is provided with multiple spring clips spaced circumferentially. These clips snap into the first annular groove, elastically snapping the filter into the valve body 10 via the spring clips. In other words, the filter is secured within the valve body 10 via an elastic snap-fit ​​mechanism. The provision of the spring clips allows for quick installation of the filter within the valve body 10. Preferably, the multiple spring clips are evenly spaced along the circumference of the filter.

[0060] See Figure 2 、 Figure 3 、 Figure 8 Preferably, the valve body 10 is provided with an end plug 60 at the fluid inlet 101. The outer circumferential wall of the end plug 60 is provided with external threads, and the inner circumferential surface of the valve body 10 is provided with matching internal threads. The end plug 60 is threadedly connected to the valve body 10 through the external and internal threads. By adjusting the end plug 60, the elastic force against the valve stem 20 can be controlled, thereby controlling the movement distance and speed of the valve stem 20.

[0061] The end plug 60 is provided with an end plug hole 61 extending axially therethrough. This end plug hole 61 can be a non-circular hole or a circular hole. In this embodiment, the end plug hole 61 is a non-circular hole, such as a plum blossom hole. The use of a non-circular hole facilitates threading the end plug 60 into the valve body 10 through the non-circular hole with the aid of a tool. The spring 30 abuts against the end plug 60. In this embodiment, a small-diameter raised ring is provided at the bottom of the end plug 60, and one end of the spring 30 abuts against the raised ring. It is understood that the corners of the outer wall of the end plug 60 can be chamfered to provide a smooth transition at the corners, thereby facilitating the end plug 60's insertion into the valve body 10 and its threaded connection therewith.

[0062] Preferably, the inner wall of the valve body 10 is provided with two opposing grooves 14. An annular step 13 is provided on the inner wall of the valve body 10 near the fluid inlet 101. The two grooves 14 extend to the top surface of the annular step 13. One end of the first annular groove extends to the annular step 13, which is used to limit the maximum depth of the filter mesh inserted into the valve body 10. It is understood that after being inserted into the valve body 10, the filter mesh may not contact the annular step 13, but may be spaced apart from the annular step 13. Alternatively, the filter mesh may abut against the annular step 13.

[0063] After the end plug 60 is screwed into the preset position within the valve body 10, mechanical deformation causes the outer peripheral wall of the end plug 60 to extend and snap into the grooves 14 on either side. After mechanical deformation, the outer peripheral wall of the end plug 60 protrudes radially outward in the direction corresponding to the grooves 14 on both sides and snaps into the grooves 14, thereby securing the end plug 60 and the valve body 10 to each other. After mechanical deformation, the end plug 60 is fixed to the valve body 10, making relative rotation between the end plug 60 and the valve body 10 less likely. This improves the stability of the assembled end plug 60 and prevents the end plug 60 from loosening or falling out of the valve body 10 due to vibration.

[0064] It is understandable that the valve body 10 may not be provided with the end plug 60, and the fluid control valve does not need to set the safety regulating pressure. Figure 9 As shown, in this embodiment, a radially extending flange 15 is provided on the inner wall of the valve body 10 near the fluid inlet 101 , one end of the spring 30 abuts against the flange 15 , and the other end of the spring 30 abuts against the first protruding ring 21 .

[0065] Specifically, the mounting groove 11 for mounting the filter element 50 is a first annular groove, one end of which extends to the front end of the flange 15. After the filter element 50 is mounted on the valve body 10, one side of the filter element 50 abuts against the flange 15. A receiving groove 150 is formed at the rear end of the flange 15 to accommodate the spring 30. The inner diameter of the rear end of the receiving groove 150 is larger than the outer diameter of the spring 30. The front end of the receiving groove 150 has a tapered wall, with its inner diameter gradually increasing from the front end to the rear end. A first raised ring 21 is provided at the end of the first end 201 of the valve stem 20. The first raised ring 21 is hollow and defines an inner cavity 210. The inner diameter of the inner cavity 210 is slightly larger than the outer diameter of the spring 30. One end of the spring 30 abuts against the flange 15, that is, one end of the spring 30 extends into the receiving groove 150 and abuts against the rear end of the flange 15. The other end of the spring 30 abuts within the inner cavity 210 of the first raised ring 21. The other end of the spring 30 is accommodated in the first protruding ring 21, so that the axial length after assembly is smaller, the axial length of the valve body 10 is smaller, and the structure is more compact. The front end of the valve body 10 is provided with a flange 15, which can simplify the structure of the fluid control valve.

[0066] See Figure 2 、 Figure 4 , the outer wall of the first convex ring 21 and / or the outer wall of the second convex ring 22 are provided with a second annular groove 211 along the circumferential direction. The provision of the second annular groove 211 can balance the pressure on the periphery of the valve stem 20, and can ensure that under the action of pressure, the valve stem 20 works in the middle of the valve body 10, and prevents the valve stem 20 from deviating to one side or adhering to the inner wall of the valve body 10. In this embodiment, a plurality of second annular grooves 211 are provided on the outer wall of the first convex ring 21 and the outer wall of the second convex ring 22. Figure 4As shown, two second annular grooves 211 are provided on the outer wall of the first protruding ring 21 at intervals along the axial direction, and two second annular grooves 211 are provided on the outer wall of the second protruding ring 22 at intervals along the axial direction.

[0067] See Figure 2 、 Figure 3 The driver 40 also includes a sleeve 43 and a stopper 44. The sleeve 43 is made of non-ferromagnetic material, such as plastic, aluminum, non-magnetic stainless steel and the like. The top of the sleeve 43 is open and the bottom is closed. The plunger 41 is slidably disposed in the sleeve 43, and the stopper 44 is disposed at one end of the driver 40 adjacent to the valve body 10. One end of the stopper 44 extends into the sleeve 43 and fits tightly with the inner wall of the sleeve 43, and the other end of the stopper 44 extends into the valve body 10 and fits tightly with the inner wall of the valve body 10. The valve stem 20 slides through the stopper 44 and abuts against the plunger 41. The stopper 44 is used to limit the maximum sliding stroke of the plunger 41 toward the valve body 10, that is, when the plunger 41 slides to the maximum sliding stroke, it abuts against the stopper 44, and the plunger 41 will not continue to slide toward the valve body 10.

[0068] Sealing rings 45 are provided on the outer wall of the valve body 10, the gap between the stopper 44 and the valve body 10, and the gap between the stopper 44 and the sleeve 43, thus forming a sealed structure both inside and outside the valve. The sealing ring 45 inside the valve ensures that fluid entering through the fluid inlet 101 does not leak through the solenoid coil portion of the valve, nor does it leak from the junction between the valve body 10 and the housing 420. In this embodiment, the provision of the sealing ring 45 prevents fluid from leaking outside the valve, facilitating assembly and maintenance.

[0069] A fixing rod 23 is provided between the second end 202 of the valve stem 20 and the plunger 41. One end of the fixing rod 23 is connected and fixed to the plunger 41, and the other end of the fixing rod 23 slides through the stopper 44 to contact and connect with the valve stem 20. The valve stem 20, the fixing rod 23 and the plunger 41 are coaxially arranged. A fixing groove 411 adapted to the fixing rod 23 is provided at the central axis position of the plunger 41. One end of the fixing rod 23 is inserted into the fixing groove 411 and has an interference fit with the fixing groove 411, thereby fixing the fixing rod 23 to the plunger 41. A plurality of guide grooves 410 are provided at intervals on the circumferential outer wall of the plunger 41. The extension direction of the guide grooves 410 is set to be parallel to the axial direction of the plunger 41, and the guide grooves 410 extend from the head to the tail of the plunger 41. Fluid from the inner chamber 100 of the valve body 10 can pass through the plunger 41 through the gap between the plunger 41 and the sleeve 43 and the guide grooves 410 on the surface of the plunger 41, thereby reducing the resistance of the fluid to the plunger 41 when it moves within the sleeve 43. The guide grooves 410 can be evenly spaced along the circumferential outer wall of the plunger 41.

[0070] The driving assembly 42 includes a housing 420, and a first magnetic pole piece 421, a second magnetic pole piece 422, a frame 423, a coil 424 and a sealing layer 425 disposed in the housing 420. The driver 40 drives the plunger 41 by electromagnetic driving.

[0071] The first magnetic pole piece 421 and the second magnetic pole piece 422 may be fixed to the housing 420 by riveting, clamping or welding, or may be connected and fixed to the housing 420 by other mechanical means.

[0072] In this embodiment, the second magnetic pole piece 422 is coaxially arranged with the first magnetic pole piece 421 and spaced apart from each other along the axial direction. The first magnetic pole piece 421 includes a cylindrical first pole piece 4210 and a first positioning portion 4211 radially protruding from the front end of the first pole piece 4210. The second magnetic pole piece 422 includes a cylindrical second pole piece 4220 and a second positioning portion 4221 radially protruding from the rear end of the second pole piece 4220. The first magnetic pole piece 421 is arranged on the valve body 10. Specifically, in this embodiment, the first positioning portion 4211 of the first magnetic pole piece 421 is fixedly mounted on the valve body 10. The first pole piece 4210 is located on the side of the first positioning portion 4211 away from the valve body 10 and is coaxially arranged with the inner cavity of the valve body 10. The sleeve 43 is housed within the first pole piece 4210 and the second pole piece 4220, and the outer wall of the sleeve 43 is in close contact with the inner walls of the first pole piece 4210 and the second pole piece 4220. The housing 420 is cylindrical with both ends open and accommodates the first magnetic pole piece 421, the second magnetic pole piece 422, the skeleton 423, the coil 424, and the sealing layer 425. The two ends of the housing 420 are curled and respectively fix the first positioning portion 4211 and the second positioning portion 4221. The sleeve 43 protrudes radially outward at one end toward the valve stem 20 to form a clamping portion 430, which is clamped between the valve body 10 and the first magnetic pole piece 421. The bottom surface of the plunger 41 is a convex surface, such as a spherical crown surface. The side of the housing 420 may be provided with a plug interface, through which a power source is connected to power the driver 40.

[0073] The skeleton 423 is made of an insulating material that is sleeved on the first pole shoe 4210 and the second pole shoe 4220. The coil 424 is wound on the skeleton 423, and the sealing layer 425 covers the coil 424 and the skeleton 423. The sealing layer 425 can specifically be made of plastic material and is formed outside the coil 424 and the skeleton 423 by overmolding, thereby protecting the coil 424. The skeleton 423, the coil 424 and the sealing layer 425 form a winding, and the winding, the first magnetic pole block 421 and the second magnetic pole block 422 form the electromagnet part of the driver 40. When the coil 424 is energized, an electromagnetic force can be generated inside the electromagnet, and the electromagnetic force will push the plunger 41 to move. The magnitude of the electromagnetic force can be adjusted by changing the magnitude of the current flowing through the coil 424, thereby adjusting the stroke of the valve stem 20.

[0074] The first magnetic pole piece 421 can be fixed to the valve body 10 by riveting, clamping, or other mechanical connection methods, or can be connected to the valve body 10 by welding. In this embodiment, the end surface of the first pole piece 4210 adjacent to the valve body 10 is provided with a connecting portion 4212 extending inward, so that it is fixed to the rear end of the valve body 10 via the connecting portion 4212.

[0075] See Figure 2 、 Figure 3 The end of the stopper 44 near the plunger 41 is covered with a magnetic isolation sleeve 46 with an open front end. This prevents the plunger 41 and the stopper 44 from becoming overly magnetized, which could affect the normal movement of the valve stem 20. The end of the magnetic isolation sleeve 46 near the plunger 41 is provided with a through hole. This through hole can be non-circular or circular, allowing the fixing rod 23 to pass through. When a non-circular hole is used, a fluid passage is formed between the fixing rod 23 and the wall of the non-circular hole. The non-circular hole can be, but is not limited to, a plum blossom hole.

[0076] The fluid control valve provided in an embodiment of the present invention has a fluid inlet 101 arranged at the axial end of the valve body 10, and a regulating port 103 and a return port 102 arranged on the side of the valve body 10. When the fluid control valve with this configuration is applied to an engine group, the oil circuit structure can be simplified and the overall structure of the engine group can be made more compact.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fluid control valve, characterized in that: include: A valve body having an inner chamber, a fluid inlet being provided at one axial end of the valve body, a reflux port and a regulating port being provided on a side wall of the valve body and communicating with the inner chamber, the reflux port being close to the fluid inlet and the regulating port being away from the fluid inlet; a valve stem slidably disposed within the valve body, the valve stem comprising a first end and a second end opposite to each other, the first end being proximate to the fluid inlet, the valve stem being provided with a first convex ring and a second convex ring in sequence from the first end to the second end, the valve stem having an interior defining a cavity extending axially along the valve stem, and the valve stem defining a through hole communicating with the cavity between the second convex ring and the second end; a spring disposed in the valve body, wherein two ends of the spring respectively abut against an end of the valve body close to the fluid inlet and the first end of the valve stem and are in a compressed state; as well as The driver is arranged at the other axial end of the valve body, and the driver includes a plunger and a driving assembly. The driving assembly can drive the plunger to slide along the axial direction of the valve stem to drive the valve stem to move axially in the valve body.

2. The fluid control valve according to claim 1, wherein: The valve body is provided with a filter element at the fluid inlet, and the filter element is provided with a plurality of elastic clamping parts at intervals along the circumferential direction, and the inner wall surface of the valve body is provided with a mounting groove for the elastic clamping part to be clamped into, and the filter element is elastically clamped in the valve body by the elastic clamping part; the mounting groove is a first annular groove, and the elastic clamping part is a spring plate provided at the periphery of the filter element, and the spring plate extends in a direction away from the valve stem; the filter element is a roughly circular filter screen; the filter screen includes a first area with a plurality of filter holes and a second area provided outside the first area, and the filter screen is provided with a plurality of notches evenly spaced at circumferential intervals in the second area, and each of the notches is provided with a spring plate, and a part of the spring plate extends radially outward from the notch.

3. The fluid control valve according to claim 2, wherein: The spring piece includes a large diameter end and a small diameter end connected to each other, the width of the large diameter end is greater than the width of the small diameter end, one end of the small diameter end is connected to the filter screen, and the end of the large diameter end away from the small diameter end is elastically clamped in the mounting groove.

4. The fluid control valve according to claim 3, wherein: The cross section of the spring piece parallel to the thickness direction thereof is T-shaped, and the side of the spring piece that abuts against the wall of the first annular groove is arc-shaped.

5. The fluid control valve according to any one of claims 1 to 4, characterized in that: The valve body is provided with an end plug at the fluid inlet, the end plug is threadedly connected to the valve body, and the end plug is provided with a hole penetrating through it in the axial direction; the spring abuts against the end plug; the inner wall of the valve body near the fluid inlet is provided with an annular step, and the inner wall surface of the valve body is provided with two opposite grooves, and the grooves extend to the step surface of the annular step that is radially parallel to the valve body; after the end plug is screwed into the preset position in the valve body, the outer peripheral wall of the end plug is extended and stuck into the grooves on both sides by mechanical deformation.

6. The fluid control valve according to any one of claims 1 to 4, characterized in that: A second annular groove is provided on the outer wall of the first protruding ring and / or the outer wall of the second protruding ring along the circumferential direction.

7. The fluid control valve according to any one of claims 1 to 4, characterized in that: The driver also includes a sleeve and a stopper, the plunger is slidably arranged in the sleeve, and the stopper is arranged at one end of the driver adjacent to the valve body; one end of the stopper extends into the sleeve, and the stopper is used to limit the maximum sliding stroke of the plunger toward the valve body, and the valve stem slides through the stopper and abuts against the plunger; the outer wall of the valve body, the connection gap between the stopper and the valve body, and the connection gap between the stopper and the sleeve are all provided with sealing rings.

8. The fluid control valve according to claim 7, wherein: A fixing rod is provided between the second end of the valve stem and the plunger, one end of the fixing rod is connected to the plunger, and the other end of the fixing rod slides through the stopper and contacts the valve stem, and the valve stem, the fixing rod and the plunger are coaxially arranged; a plurality of guide grooves are provided at intervals on the circumferential surface of the plunger, an extension direction of the guide grooves is parallel to the axial direction of the plunger, and the guide grooves extend from the head to the tail of the plunger.

9. The fluid control valve according to claim 7, wherein: An end of the stopper close to the plunger is sleeved with a magnetic isolation sleeve.

10. The fluid control valve according to claim 7, wherein: The drive assembly includes a shell, and a first magnetic pole block, a second magnetic pole block, a skeleton, a coil and a sealing layer arranged in the shell; the first magnetic pole block and the second magnetic pole block are arranged in the shell along the axial direction and are located on the periphery of the sleeve, the first magnetic pole block is fixedly connected to the end of the valve body away from the fluid inlet, the skeleton is arranged on the periphery of the first magnetic pole block and the second magnetic pole block, the coil is wound on the skeleton, and the sealing layer covers the coil and the skeleton.

11. The fluid control valve according to any one of claims 1 to 4, characterized in that: A radially extending flange is provided on the inner wall of the valve body close to one end of the fluid inlet, and one end of the spring abuts against the flange.

12. The fluid control valve according to any one of claims 1 to 4, characterized in that: The first convex ring is provided at the end portion of the first end of the valve stem. The first convex ring is hollow and forms an inner cavity. The other end of the spring is held in the inner cavity of the first convex ring.

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