Lower valve positioning mechanism, lower valve mechanism and fluid valve device

Abstract

A lower valve positioning mechanism, a lower valve mechanism and a fluid valve device include a first catch and a second catch, the first catch is configured to be arranged below a lower valve, the first catch deforms after being in contact with the lower valve and exerts force on the lower valve to prevent the lower valve from moving downwards, and the second catch is configured to be arranged below the lower valve. The second blocking piece is arranged below the first blocking piece, a first preset distance exists between the second blocking piece and the first blocking piece, if the first blocking piece deforms to move downwards by the first preset distance and makes contact with the second blocking piece, the second blocking piece deforms, and the second blocking piece and the first blocking piece jointly exert force on the lower valve to prevent the lower valve from moving downwards. According to the utility model, the two separation blades which are combined in a vertical crossing manner are used for positioning the lower valve, so that the pre-tightening force of a traditional positioning spring on the lower valve and the influence on the opening and closing of the electromagnetic valve are eliminated, the damping for the movement of the lower valve is increased, the stress in the separation blades is reduced, and the failure (such as fracture) of the separation blades is eliminated.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and more particularly to a solenoid valve for fluid control, and especially to a lower position valve positioning mechanism, a lower position valve mechanism and a fluid valve device for engine braking. Background Technology

[0002] Most existing engine braking systems use spring-loaded solenoid valves with lower-position valves that are spring-loaded, such as the brake solenoid valves disclosed in US patents US4,251,051 and US 5,626,116. The opening and closing oil pressure of such spring-loaded solenoid valves is affected by the preload of the positioning spring, which is detrimental to the operation of the engine brake. Summary of the Invention

[0003] The purpose of this utility model is to provide a lower position valve positioning mechanism, a lower position valve mechanism, and a fluid valve device. This lower position valve positioning mechanism aims to solve the technical problem in the prior art where the lower position valve of a solenoid valve is affected by the preload of the positioning spring, thus affecting the opening and closing of the solenoid valve.

[0004] The first aspect of this utility model provides a lower valve positioning mechanism.

[0005] The lower valve limiting mechanism includes a first baffle and a second baffle;

[0006] The first baffle is positioned below the lower position valve. The first baffle is configured to deform upon contact with the lower position valve, applying a force to the lower position valve to prevent it from moving downwards.

[0007] The second baffle is disposed below the first baffle and is at a first preset distance from the first baffle. If the first baffle deforms and moves downwards by the first preset distance and comes into contact with the second baffle, the second baffle deforms. The second baffle and the first baffle together exert a force on the lower valve to prevent the lower valve from moving downwards.

[0008] Optionally, both the first baffle and the second baffle are trapezoidal and include a top section disposed at the top and side sections disposed at both ends of the top section, with the two ends of the top section extending obliquely downward to form the side sections.

[0009] Optionally, at least the top section of the first baffle and / or the second baffle deforms and applies a force to the lower valve.

[0010] Optionally, the lower valve contacts the top section of the first baffle, at least the top section of the first baffle deforms; if the top section of the first baffle deforms and moves downward to contact the top section of the second baffle, at least the top section of the second baffle deforms.

[0011] Optionally, at least the top and side sections of the first and / or second baffles deform and exert a force on the lower valve.

[0012] Optionally, the first baffle and the second baffle further include a mounting section, wherein one end of the side section away from the top section extends in a direction parallel to the top section to form the mounting section.

[0013] Optionally, the mounting section is provided with a mounting groove.

[0014] Optionally, the mounting section of the first baffle and the mounting section of the second baffle are disposed on the same plane.

[0015] Optionally, the first baffle and the second baffle are arranged at an angle to each other along their respective length directions.

[0016] Optionally, the first baffle and the second baffle are arranged perpendicular to each other along their respective length directions.

[0017] Optionally, an arc connection is provided between the top segment and the side segment, and / or an arc connection is provided between the side segment and the mounting segment.

[0018] Optionally, the first baffle and the second baffle have one or more of the following features:

[0019] (1) The first preset distance is not greater than 1 mm; preferably, the first preset distance is 0.7 mm;

[0020] (2) The first baffle and the second baffle have the same width, which is 3 mm;

[0021] (3) The first baffle and the second baffle have the same thickness, and the thickness does not exceed 0.4 mm; preferably, the thickness is 0.2 mm.

[0022] (4) The first baffle is 1 mm higher than the second baffle; preferably, the first baffle is 0.9 mm higher than the second baffle.

[0023] Optionally, the first baffle and / or the second baffle are spring plates.

[0024] Optionally, the lower-position valve is a ball valve.

[0025] The second aspect of this utility model provides a lower valve mechanism, the lower valve mechanism including a lower valve and a lower valve positioning mechanism as described in any of the above claims disposed below the lower valve, wherein a second preset distance is provided between the lower valve positioning mechanism and the lower valve, the lower valve moves downward by the second preset distance and contacts the lower valve positioning mechanism, and the lower valve positioning mechanism applies a force to the lower valve to prevent the lower valve from moving downward.

[0026] Optionally, a second preset distance is provided between the first baffle of the lower valve positioning mechanism and the lower valve. When the lower valve moves downward by the second preset distance and contacts the first baffle, the first baffle deforms and applies a force to the lower valve to prevent it from moving downward. If the first baffle deforms and moves downward by the first preset distance and contacts the second baffle, the second baffle deforms, and the second baffle and the first baffle together apply a force to the lower valve to prevent it from moving downward.

[0027] Optionally, the second preset distance is not less than the stroke of the lower valve.

[0028] A third aspect of this utility model provides a fluid valve device, which further includes a solenoid valve body with an oil inlet hole. The oil inlet hole is provided with a lower valve mechanism as described above. The lower valve positioning mechanism is disposed below the lower valve so that the lower valve is held in the oil inlet hole.

[0029] Optionally, the wall of the oil inlet hole is provided with a plurality of positioning grooves, and the plurality of positioning grooves are arranged on the same cross section perpendicular to the axial direction of the oil inlet hole, and the first baffle and the second baffle are respectively installed in the positioning grooves.

[0030] Optionally, the wall of the oil inlet hole is provided with four positioning grooves, and the two ends of the first baffle are first placed in two of the positioning grooves, and the two ends of the second baffle are then placed in the remaining two positioning grooves.

[0031] A fourth aspect of this utility model provides a fluid valve device, which includes a solenoid valve body having an oil inlet and an oil outlet, and a drive pin that mechanically interacts with an electromagnetic actuator. A lower-position valve and a lower-position valve seat are provided in the oil inlet, and an upper-position valve and an upper-position valve seat are provided in the oil outlet. A connecting rod is provided between the upper-position valve and the lower-position valve.

[0032] When the electromagnetic actuator is energized, the electromagnetic force overcomes the oil supply pressure acting on the lower valve and pushes the drive pin downward. The drive pin pushes the upper valve downward and drives the connecting rod to move downward, thereby pushing the lower valve downward. The upper valve is pressed against the upper valve seat by the drive pin, closing the oil discharge passage. The lower valve is pushed away from the lower valve seat by the connecting rod, opening the oil inlet passage.

[0033] When the electromagnetic actuator is de-energized, the oil supply pressure pushes the lower valve upward and drives the connecting rod to move upward, thereby pushing the upper valve upward. The lower valve is pushed against the lower valve seat by the oil supply pressure, closing the oil inlet passage. The upper valve is pushed away from the upper valve seat by the connecting rod, opening the oil unloading passage.

[0034] Optionally, the oil inlet is located at the lower end of the solenoid valve body. One end of the oil inlet includes an oil inlet opening on the lower surface of the solenoid valve body, and the other end includes a lower valve seat located inside the solenoid valve body. The lower valve seat has an oil hole.

[0035] When the lower valve is pushed away from the lower valve seat by the connecting rod, the lower valve leaves the oil hole and opens the oil inlet passage.

[0036] When the lower valve is pushed against the lower valve seat by the oil supply pressure, the lower valve blocks the oil hole and closes the oil inlet passage.

[0037] Optionally, the oil discharge hole is located at the upper end of the solenoid valve body. One end of the oil discharge hole includes an oil discharge hole opening on the upper surface of the solenoid valve body, and the other end includes an upper valve seat located inside the solenoid valve body. The upper valve seat has an oil hole.

[0038] When the upper valve is pressed against the upper valve seat by the drive pin, the upper valve blocks the oil hole and closes the oil unloading passage.

[0039] When the upper valve is pushed away from the upper valve seat by the connecting rod, the upper valve leaves the oil hole and opens the oil unloading passage.

[0040] Optionally, the fluid valve device further includes an oil outlet; wherein

[0041] When the electromagnetic driver is energized, the oil inlet passage is opened and the oil outlet passage is closed, allowing oil to flow in from the oil inlet and out from the oil outlet.

[0042] When the electromagnetic driver is de-energized, the oil inlet passage is closed and the oil outlet passage is opened, allowing oil to flow in from the oil outlet and out from the oil outlet.

[0043] Optionally, the oil supply pressure is generated by the oil pressure upstream of the oil inlet.

[0044] Optionally, the fluid valve device further includes a lower valve positioning mechanism, which is disposed within the oil inlet and below the lower valve to keep the lower valve within the oil inlet.

[0045] The fifth aspect of this utility model provides a lower position valve positioning mechanism, including a first baffle and a second baffle. The first baffle is located below the lower position valve, and the second baffle is located below the first baffle. After the lower position valve moves down a predetermined distance, it will contact the first baffle. The first baffle moves down and will contact the second baffle. The positioning mechanism composed of the first baffle and the second baffle keeps the lower position valve in the oil inlet at the lower end of the valve body.

[0046] Optionally, four positioning grooves are provided on the wall of the oil inlet hole at the lower end of the valve body. The four positioning grooves are evenly distributed on the same cross-section, and the two ends of the first baffle and the two ends of the second baffle are respectively placed in the four positioning grooves.

[0047] Optionally, both ends of the first baffle and both ends of the second baffle are provided with mounting grooves. The two ends of the first baffle are first placed in two positioning grooves, and the two ends of the second baffle are then placed in the other two positioning grooves.

[0048] Optionally, the distance between the first baffle and the lower valve is a predetermined distance by which the lower valve moves downward, and its size is not less than the stroke of the lower valve. The distance between the first baffle and the second baffle is not greater than 1 mm.

[0049] Optionally, both the first and second baffles are trapezoidal, and the four turns of the trapezoids are rounded.

[0050] Optionally, the first and second baffles have the same width and are approximately 3 millimeters in size.

[0051] Optionally, the first and second baffles have the same thickness and their size does not exceed 0.4 mm.

[0052] Optionally, the first baffle is about 1 mm higher than the second baffle.

[0053] Optionally, both the first and second baffles are spring plates.

[0054] The working principle of this utility model is as follows: when the electromagnetic driver is de-energized (normal state), the electromagnetic force is zero, the oil supply pressure pushes the lower valve upward onto the lower valve seat (closing the oil inlet valve), and pushes the upper valve away from the upper valve seat through the connecting rod (opening the pressure relief valve to discharge oil).

[0055] When the electromagnetic actuator is energized (operating state), the electromagnetic force overcomes the oil supply pressure acting on the lower valve, pushing the drive pin and the upper valve downwards, and then pushing the lower valve through the connecting rod. The upper valve is pushed against the upper valve seat by the drive pin (closing the unloading valve). At the same time, the lower valve is pushed away from the lower valve seat by the connecting rod (opening the inlet valve), supplying oil from the inlet to the outlet to the oil passage of the drive mechanism (such as the engine braking mechanism). The stroke of the lower valve is the same as that of the upper valve (valve stroke or opening), and its size is determined by the height of the connecting rod and the distance between the upper and lower valve seats. If the oil pressure in the drive mechanism's oil passage (downstream of the outlet) fluctuates (unstable pulse), impacting the lower valve to move further downwards, the first baffle (first spring plate) located below the lower valve will hinder the downward movement of the lower valve; the first baffle deforms and moves downwards under force, and the second baffle (second spring plate) located below the first baffle will hinder the downward movement of the first baffle. Therefore, the positioning mechanism consisting of the first and second baffles can hold the lower valve within the valve body without affecting the opening and closing of the solenoid valve. Since the first and second baffles are spatially offset, their impact on the flow rate of the solenoid valve is minimal.

[0056] Compared with existing technologies, the advantages of this invention are positive and significant. This invention eliminates the need for traditional positioning springs, thus eliminating the preload of the positioning spring on the lower valve and its impact on the opening and closing of the solenoid valve. This combination of two three-dimensional, cross-shaped baffles offers the following advantages: it increases damping of the lower valve's movement, reduces stress within the baffles, eliminates baffle failure (such as breakage), and does not affect the flow rate of the solenoid valve. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of the structure of the lower valve positioning mechanism of this utility model in a fluid valve device, wherein the lower valve is in the seated (closed) state, that is, the normal state in which the solenoid valve is not energized.

[0058] Figure 2 This is a schematic diagram of the first baffle of the lower valve positioning mechanism of this utility model.

[0059] Figure 3 This is a schematic diagram of the second baffle of the lower valve positioning mechanism of this utility model. Detailed Implementation

[0060] Figure 1This is a schematic diagram of an embodiment of the lower-position valve positioning mechanism of the present invention in a fluid valve device, wherein the lower-position valve 67 (oil inlet valve) is in a seated (closed) state. The fluid valve device includes an electromagnetic actuator 50 and an electromagnetic valve body 60. The electromagnetic valve body 60 includes an oil discharge hole 72, an oil inlet hole 69, and an oil outlet hole 74. The oil inlet hole houses the lower-position valve 67 and the lower-position valve seat 73b, and the oil discharge hole 72 houses the upper-position valve 64 and the upper-position valve seat 73a. A connecting rod 66 is provided between the upper-position valve 64 and the lower-position valve 67. The fluid valve device also includes a drive pin 63 that has a mechanical action with the electromagnetic actuator 50. The drive pin 63 drives the upper-position valve 64 to move, thereby driving the connecting rod 66 to move. The upper-position valve 64 and the lower-position valve 67 can be any of the following: a ball, a cylinder, a cone, etc.

[0061] When the electromagnetic actuator 50 is de-energized (in normal state), the electromagnetic force is zero. The oil supply pressure pushes the lower valve 67 (oil inlet valve) upward onto the lower valve seat 73b (closing the oil inlet valve). Simultaneously, it moves the connecting rod 66 upward, which in turn pushes the upper valve 64 away from the upper valve seat 73a (opening the pressure relief valve to discharge oil). Thus, the oil inlet passage is closed, and the oil discharge passage is opened. Oil flows in from the oil outlet 74 and flows out from the oil discharge port 72.

[0062] It should be noted that the oil inlet 69, oil outlet 74, and inclined oil outlet 72 are respectively configured to be in fluid communication with the first oil circuit, the second oil circuit, and the drain oil circuit. The first oil circuit can be the fuel supply circuit of the vehicle, and the second oil circuit can be the oil passage for the drive mechanism (such as the engine braking mechanism). When the electromagnetic actuator 50 is de-energized, the oil supply pressure that pushes the lower valve 67 upward can be the pressure generated upstream of the oil inlet 69, which can be understood as the pressure generated by the first oil circuit. When the electromagnetic actuator 50 is de-energized, it can be during the non-braking process of the engine. Oil flows in from the oil outlet 74 and flows out from the oil discharge 72. This can be understood as the oil flowing out from the oil discharge 72 and being discharged through the drain oil circuit.

[0063] Figure 1The solenoid valve body 60 is provided with a valve cavity, an oil inlet 69, an oil outlet 74, and an oil discharge port 72. The electromagnetic actuator 50 includes an electromagnetic coil 51 and an armature (not shown). The armature is located above the solenoid valve body 60. The oil discharge port 72 is located at the upper end of the solenoid valve body 60, the oil inlet 69 is located at the lower end of the solenoid valve body 60, and the oil outlet 74 is located in the middle of the solenoid valve body 60. The oil discharge port 72, the oil inlet 69, and the oil outlet 74 are all connected to the valve cavity. An upper valve seat 73a is provided in the solenoid valve body 60 within the oil discharge port 72, and a lower valve seat 73b is provided in the valve body 60 within the oil inlet 69. An upper valve (oil discharge valve) 64 is provided on the upper valve seat 73a within the oil discharge port 72, and a lower valve 67 is provided on the lower valve seat 73b within the oil inlet 69. The upper-position valve 64 and the lower-position valve 67 are connected by a connecting rod 66. A connecting channel 86 is provided between the oil inlet port 69 and the oil outlet port 72, and the connecting channel 86 is in fluid communication with the oil inlet port 69 and the oil outlet port 72. The connecting rod 66 is disposed in the connecting channel 86. The two ends of the connecting channel 86 are oil holes 85a and 85b, respectively. A drive pin 63 is provided at the upper end of the upper-position valve 64, and the drive pin 63 is located below the armature. An oil outlet groove 70 is provided at the upper end of the solenoid valve body 60, and the oil outlet groove 70 is in communication with the outer opening of the oil outlet port 72.

[0064] When the electromagnetic actuator is energized (operating state), the electromagnetic force overcomes the oil supply pressure acting on the lower valve 67, pushing the drive pin 63 and the upper valve 64 downwards, and pushing the lower valve 67 through the connecting rod 66. The upper valve 64 is pushed against the upper valve seat 73a by the drive pin 63 (closing the unloading valve). At the same time, the lower valve 67 is pushed away from the lower valve seat 73b by the connecting rod 66 (opening the inlet valve). Thus, the unloading passage is closed and the inlet passage is opened. Oil flows in from the inlet hole and out from the outlet hole, flowing into the second oil passage, which can be an oil passage for the drive mechanism (such as the engine braking mechanism). The stroke of the lower valve 67 is the same as the stroke of the upper valve 64 (valve stroke or opening), and its magnitude is determined by the height of the connecting rod 66 and the distance between the upper valve seat 73a and the lower valve seat 73b. If the oil pressure in the second oil passage (downstream of the oil outlet) fluctuates (unstable pulse), impacting the lower valve 67 to move further downward, the lower valve positioning mechanism located below the lower valve 67 will hinder the downward movement of the lower valve 67. The first baffle 77 (first spring plate) of the lower valve positioning mechanism will hinder the downward movement of the lower valve 67; if the first baffle 77 deforms and moves downward under force, the second baffle 78 (second spring plate) located below the first baffle 77 will hinder the downward movement of the first baffle 77. Therefore, the lower valve positioning mechanism composed of the first baffle 77 and the second baffle 78 can hold the lower valve 67 within the solenoid valve body 60; preferably, the lower valve positioning mechanism can hold the lower valve 67 within the oil inlet 69 of the solenoid valve body 60; it does not affect the opening and closing of the solenoid valve. Since the first baffle 77 and the second baffle 78 are spatially offset, their influence on the flow rate of the solenoid valve is negligible.

[0065] An oil inlet 69 is located at the lower end of the solenoid valve body 60. One end of the oil inlet 69 includes an oil inlet opening 691 located on the lower surface of the solenoid valve body 60, and the other end includes a lower valve seat 73b located inside the solenoid valve body 60. The lower valve seat 73b has an oil hole 85b. When the lower valve 67 is pushed away from the lower valve seat 73b by the connecting rod 66, the lower valve 67 leaves the oil hole 85b, opening the oil inlet passage; when the lower valve 67 is pressed against the lower valve seat 73b by the oil supply pressure, the lower valve 67 blocks the oil hole 85b, closing the oil inlet passage. The lower valve seat 73b is located at the bottom of the oil inlet 69, and the oil hole 85b is preferably located in the middle of the lower valve seat 73b.

[0066] An oil discharge port 72 is located at the upper end of the solenoid valve body 60. One end of the oil discharge port 72 includes an oil discharge opening 721 located on the upper surface of the solenoid valve body 60, and the other end includes an upper valve seat 73a located inside the solenoid valve body 60. The upper valve seat 73a has an oil hole 85a. When the upper valve 64 is pushed against the upper valve seat 73a by the drive pin 63, the upper valve 64 blocks the oil hole 85a, closing the oil discharge passage. When the upper valve 64 is pushed away from the upper valve seat 73a by the connecting rod 66, the upper valve 64 leaves the oil hole 85a, opening the oil discharge passage. The upper valve seat 73a is located at the bottom of the oil discharge port 72, and the oil hole 85a is preferably located in the middle of the upper valve seat 73a.

[0067] An annular groove 62 (for assembling the solenoid valve) is provided circumferentially on the upper outer side of the solenoid valve body 60. A first sealing ring 65 and a second sealing ring 68 are provided on the outer side of the solenoid valve body 60. The first sealing ring 65 is located between the oil outlet hole 74 and the oil discharge hole 72, and the second sealing ring 68 is located between the oil inlet hole 69 and the oil outlet hole 74.

[0068] The inner wall of the oil discharge hole 72 is provided with a guide rib 75a parallel to the axial direction to guide the upper valve 64; the inner wall of the oil inlet hole 69 is provided with a guide rib 75b parallel to the axial direction to guide the lower valve 67.

[0069] Figure 2 and Figure 3 This is a schematic diagram of the first baffle 77 and the second baffle 78 of the lower-position valve positioning mechanism. The lower-position valve mechanism includes a lower-position valve and a lower-position valve positioning mechanism disposed below the lower-position valve. The lower-position valve positioning mechanism includes a first baffle 77 and a second baffle 78. The first baffle 77 is located below the lower-position valve 67, and the second baffle 78 is located below the first baffle 77. A second preset distance is provided between the first baffle 77 and the lower-position valve 67. After the lower-position valve 67 moves downward by the second preset distance, it contacts the first baffle 77. The first baffle 77 deforms and applies a force to the lower-position valve 67 to prevent it from moving downward. The second baffle 78 is disposed below the first baffle 77 and has a first preset distance between it and the first baffle 77. If the first baffle 77 deforms and moves downward by the first preset distance and contacts the second baffle 78, the second baffle 78 deforms. The second baffle 78 and the first baffle 77 together apply a force to the lower-position valve 67 to prevent it from moving downward. The positioning mechanism, consisting of the first baffle 77 and the second baffle 78, holds the lower valve 67 within the oil inlet 69 at the lower end of the valve body 60.

[0070] The first baffle 77 is trapezoidal and includes a top section 771 at the top and side sections 772 at both ends of the top section 771. The two ends of the top section 771 extend obliquely downwards to form the side sections 772. The first baffle 77 also includes a mounting section 773, where the end of each side section 772 away from the top section 771 extends in a direction parallel to the top section 771 to form the mounting section 773. Since the first baffle 77 includes two side sections 772 at both ends of the top section 771, the ends of the two side sections 772 away from the top section 771 extend in a direction parallel to the top section 771 to form two mounting sections 773. Furthermore, due to manufacturing processes, the mounting sections 773 only need to be approximately parallel to the top section 771, simply to ensure easy installation of the mounting sections 773 onto the solenoid valve body 60. The mounting section 773 is provided with a mounting groove 83, which can be positioned and installed with a positioning groove provided on the wall of the oil inlet hole 69.

[0071] The second baffle 78 is trapezoidal and includes a top section 781 at the top and side sections 782 at both ends of the top section 781. The two ends of the top section 781 extend obliquely downwards to form the side sections 782. The second baffle 78 also includes mounting sections 783, with the ends of the side sections 782 away from the top section 781 extending in a direction parallel to the top section 781 to form the mounting sections 783. Since the second baffle 78 includes two side sections 782 at both ends of the top section 781, the ends of the two side sections 782 away from the top section 781 extend in a direction parallel to the top section 781 to form two mounting sections 783. Furthermore, due to manufacturing processes, the mounting sections 783 only need to be approximately parallel to the top section 781, simply to ensure easy installation of the mounting sections 783 onto the solenoid valve body 60. The mounting sections 783 are provided with mounting grooves 84, which can be positioned and installed with the positioning grooves provided on the wall of the oil inlet hole 69.

[0072] The mounting section 773 of the first baffle 77 and the mounting section 783 of the second baffle 78 are on the same plane. It can be understood that the upper surface of the mounting section 773 and the upper surface of the mounting section 783 are on the same plane, or the lower surface of the mounting section 773 and the lower surface of the mounting section 783 are on the same plane. If the thickness of the first baffle 77 and the second baffle 78 is the same, then their upper and lower surfaces are both on the same plane.

[0073] The first baffle 77 and the second baffle 78 can be integrally formed or separate structures that are then spliced, welded or assembled together.

[0074] At least the top section 771 of the first baffle 77 and / or at least the top section 781 of the second baffle 78 deform and apply force to the lower valve 67. Optionally, at least the top section 771 and side section 772 of the first baffle 77 and / or at least the top section 781 and side section 782 of the second baffle 78 deform and apply force to the lower valve 67. For example, the lower valve 67 contacts the top section 771 of the first baffle 77, at least the top section 771 of the first baffle 77 deforms and applies force to the lower valve 67. The top section 771 of the first baffle 77 may deform and move downward to contact the top section 781 of the second baffle 78, at least the top section 781 of the second baffle 78 deforms, and together with the first baffle, applies force to the lower valve 67.

[0075] The four bends 81 of the trapezoidal first baffle 77 are connected by arcs. That is, the connection between the top section 771 and the side section 772 is provided with an arc, and / or the connection between the side section 772 and the mounting section 773 is provided with an arc. The arc connection / rounded corner can reduce stress / fracture at the connection.

[0076] The four bends 82 of the trapezoidal second baffle 78 are connected by rounded arcs. That is, the connection between the top section 781 and the side section 782 is provided with a rounded arc, and / or the connection between the side section 782 and the mounting section 783 is provided with a rounded arc. Rounded arcs / rounded corners can reduce stress / fracture at the connection.

[0077] The first baffle 77 and the second baffle 78 have the same width, approximately 3 mm. The first baffle 77 and the second baffle 78 have the same thickness, not exceeding 0.4 mm, preferably 0.2 mm. Furthermore, the first baffle 77 is approximately 1 mm higher than the second baffle 78; preferably, the first preset distance is 0.9 mm. The first preset distance is not greater than 1 mm; preferably, the first preset distance is 0.7 mm. Also, in this embodiment, both the first baffle 77 and the second baffle 78 are spring sheets. The first preset distance = height difference between the first and second baffles - thickness. Additionally, the values ​​of the above-mentioned first preset distance, second preset distance, width, thickness, and height difference may have certain deviations due to manufacturing processes.

[0078] The first baffle 77 and the second baffle 78 are spatially offset, which can be understood as the first baffle 77 and the second baffle 78 being arranged at an angle to each other along their respective length directions. The length direction of the first baffle 77 is the direction in which the mounting section 773, side section 772, top section 771, side section 772, and mounting section 773 of the first baffle 77 are arranged in sequence. The length direction of the second baffle 78 is the direction in which the mounting section 783, side section 782, top section 781, side section 782, and mounting section 783 of the second baffle 78 are arranged in sequence. A straight line is drawn along the length directions of the first baffle 77 and the second baffle 78, and the two lines are not parallel. Preferably, refer to... Figure 1 The first baffle 77 and the second baffle 78 are set perpendicular to each other along their respective length directions. That is, if a straight line is drawn along the length direction of the first baffle 77 and the second baffle 78, the two straight lines are perpendicular to each other.

[0079] Four positioning grooves 79 are provided on the wall of the oil inlet hole 69 at the lower end of the solenoid valve body 60. The four positioning grooves are evenly distributed on the same cross-section, which is perpendicular to the axial direction of the oil inlet hole 69. The two ends of the first baffle 77 and the two ends of the second baffle 78 are respectively installed in the four positioning grooves 79 (the first baffle 77 is installed first, then the second baffle 78 is installed). Preferably, the mounting sections of the two ends of the first baffle 77 and the two ends of the second baffle 78 are respectively installed in the four positioning grooves 79. The distance between the first baffle 77 and the lower valve 67 is a predetermined distance (second preset distance) for the lower valve 67 to move downward. Its size is not less than the stroke 53 of the lower valve (the same as the stroke of the upper valve 64, also called the valve stroke or opening). The distance between the first baffle 77 and the second baffle 78 (first preset distance) is not greater than 1 mm (buffer section).

[0080] The embodiments described herein are illustrative and not intended to limit the scope of the invention. In fact, those skilled in the art can make modifications and variations to the invention within its scope and principles. For example, a certain function described in one specific device can be used in another specific device, thus resulting in a new device. Therefore, the invention will include the aforementioned modifications and variations, as long as they fall within the scope of the claims or the corresponding claims.

Claims

1. A lower-position valve positioning mechanism, characterized in that: The lower valve limiting mechanism includes a first baffle and a second baffle; The first baffle is positioned below the lower position valve. The first baffle is configured to deform upon contact with the lower position valve, applying a force to the lower position valve to prevent it from moving downwards. The second baffle is disposed below the first baffle and is at a first preset distance from the first baffle. If the first baffle deforms and moves downwards by the first preset distance and comes into contact with the second baffle, the second baffle deforms. The second baffle and the first baffle together exert a force on the lower valve to prevent the lower valve from moving downwards.

2. The lower valve positioning mechanism as described in claim 1, characterized in that: Both the first baffle and the second baffle are trapezoidal and include a top section disposed at the top and side sections disposed at both ends of the top section, with the two ends of the top section extending obliquely downward to form the side sections.

3. The lower valve positioning mechanism as described in claim 2, characterized in that: At least the top segment of the first baffle and / or the second baffle undergoes deformation.

4. The lower valve positioning mechanism as described in claim 3, characterized in that: The lower valve contacts the top section of the first baffle, at least the top section of the first baffle deforms; if the top section of the first baffle deforms and moves downward to contact the top section of the second baffle, at least the top section of the second baffle deforms.

5. The lower valve positioning mechanism as described in claim 2, characterized in that: The first baffle and the second baffle also include a mounting section, wherein the side section extends in a direction parallel to the top section from one end away from the top section to form the mounting section.

6. The lower valve positioning mechanism as described in claim 5, characterized in that: The installation section is provided with an installation slot.

7. The lower valve positioning mechanism as described in claim 5, characterized in that: The mounting section of the first baffle and the mounting section of the second baffle are disposed on the same plane.

8. The lower valve positioning mechanism as described in claim 1, characterized in that: The first baffle and the second baffle are set at an angle to each other along their respective length directions.

9. The lower valve positioning mechanism as described in claim 8, characterized in that: The first baffle and the second baffle are arranged perpendicular to each other along their respective length directions.

10. The lower-position valve positioning mechanism as described in any one of claims 2 to 7, characterized in that: An arc connection is provided between the top segment and the side segment, and / or An arc connection is provided between the side section and the mounting section of the first baffle, or an arc connection is provided between the side section and the mounting section of the second baffle.

11. The lower valve positioning mechanism as described in claim 1, characterized in that: The first baffle and the second baffle have one or more of the following characteristics: (1) The first preset distance is no greater than 1 mm; (2) The first baffle and the second baffle have the same width, which is 3 mm; (3) The first baffle and the second baffle have the same thickness, and the thickness does not exceed 0.4 mm; (4) The first baffle is 1 mm higher than the second baffle.

12. The lower valve positioning mechanism as described in claim 11, characterized in that: The first baffle and the second baffle have one or more of the following characteristics: (1) The first preset distance is 0.7 mm; (2) The first baffle and the second baffle have the same thickness, which is 0.2 mm; (3) The first baffle is 0.9 mm higher than the second baffle.

13. The lower valve positioning mechanism as described in claim 1, characterized in that: The first baffle and / or the second baffle are spring plates.

14. The lower valve positioning mechanism as described in claim 1, characterized in that: The lower-position valve is a ball valve.

15. A lower-position valve mechanism, characterized in that: The lower valve mechanism includes a lower valve and a lower valve positioning mechanism as described in any one of claims 1 to 14 disposed below the lower valve, wherein a second preset distance is provided between the lower valve positioning mechanism and the lower valve, the lower valve moves downward by the second preset distance and contacts the lower valve positioning mechanism, and the lower valve positioning mechanism applies a force to the lower valve to prevent the lower valve from moving downward.

16. The lower-position valve mechanism as described in claim 15, characterized in that, A second preset distance is provided between the first baffle of the lower valve positioning mechanism and the lower valve. When the lower valve moves downward by the second preset distance and contacts the first baffle, the first baffle deforms and applies a force to the lower valve to prevent it from moving downward. If the first baffle deforms and moves downward by the first preset distance and contacts the second baffle, the second baffle deforms, and the second baffle and the first baffle together apply a force to the lower valve to prevent it from moving downward.

17. The lower-position valve mechanism as described in claim 15 or 16, characterized in that: The second preset distance is not less than the stroke of the lower valve.

18. A fluid valve device, characterized in that: The fluid valve device further includes a solenoid valve body with an oil inlet, wherein a lower valve mechanism as described in any one of claims 15 to 17 is provided in the oil inlet, and the lower valve positioning mechanism is disposed below the lower valve so that the lower valve is held in the oil inlet.

19. The fluid valve device as claimed in claim 18, characterized in that: The oil inlet hole has multiple positioning grooves on its wall. These positioning grooves are arranged on the same cross-section perpendicular to the axial direction of the oil inlet hole. The first baffle and the second baffle are respectively installed in the positioning grooves.

20. The fluid valve device according to claim 19, characterized in that, The oil inlet hole has four positioning grooves on its wall. The two ends of the first baffle are first placed in two of the positioning grooves, and the two ends of the second baffle are then placed in the remaining two positioning grooves.

21. The fluid valve device as claimed in claim 18, characterized in that: The fluid valve device includes a solenoid valve body with an oil inlet and an oil outlet, and a drive pin that mechanically interacts with the solenoid actuator. A lower-position valve and a lower-position valve seat are located within the oil inlet, and an upper-position valve and an upper-position valve seat are located within the oil outlet. A connecting rod is provided between the upper-position valve and the lower-position valve. When the electromagnetic actuator is energized, the electromagnetic force overcomes the oil supply pressure acting on the lower valve and pushes the drive pin downward. The drive pin pushes the upper valve downward and drives the connecting rod to move downward, thereby pushing the lower valve downward. The upper valve is pressed against the upper valve seat by the drive pin, closing the oil discharge passage. The lower valve is pushed away from the lower valve seat by the connecting rod, opening the oil inlet passage. When the electromagnetic actuator is de-energized, the oil supply pressure pushes the lower valve upward and drives the connecting rod to move upward, thereby pushing the upper valve upward. The lower valve is pushed against the lower valve seat by the oil supply pressure, closing the oil inlet passage. The upper valve is pushed away from the upper valve seat by the connecting rod, opening the oil unloading passage.

22. The fluid valve device as claimed in claim 21, characterized in that: The oil inlet is located at the lower end of the solenoid valve body. One end of the oil inlet includes an oil inlet opening on the lower surface of the solenoid valve body, and the other end includes a lower valve seat located inside the solenoid valve body. The lower valve seat has an oil hole. When the lower valve is pushed away from the lower valve seat by the connecting rod, the lower valve leaves the oil hole and opens the oil inlet passage. When the lower valve is pushed against the lower valve seat by the oil supply pressure, the lower valve blocks the oil hole and closes the oil inlet passage.

23. The fluid valve device as claimed in claim 21, characterized in that: The oil discharge hole is located at the upper end of the solenoid valve body. One end of the oil discharge hole includes an oil discharge hole opening on the upper surface of the solenoid valve body, and the other end includes an upper valve seat located inside the solenoid valve body. The upper valve seat has an oil hole. When the upper valve is pressed against the upper valve seat by the drive pin, the upper valve blocks the oil hole and closes the oil unloading passage. When the upper valve is pushed away from the upper valve seat by the connecting rod, the upper valve leaves the oil hole and opens the oil unloading passage.

24. The fluid valve device as claimed in claim 21, characterized in that, The fluid valve device further includes an oil outlet; wherein When the electromagnetic driver is energized, the oil inlet passage is opened and the oil outlet passage is closed, allowing oil to flow in from the oil inlet and out from the oil outlet. When the electromagnetic driver is de-energized, the oil inlet passage is closed and the oil outlet passage is opened, allowing oil to flow in from the oil outlet and out from the oil outlet.

25. The fluid valve device as claimed in claim 21, characterized in that, The oil supply pressure is generated by the oil pressure upstream of the oil inlet.

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