A valve

Abstract

The application relates to the technical field of fluid delivery control, in particular to a valve, which comprises a valve core, a valve sleeve, a sealing element, a driving part and a reset part. The valve sleeve is provided with a pressure relief port, and the valve core is provided with a pressure relief channel. The valve core is located in the valve sleeve and forms an oil passage and a containing cavity with the valve sleeve. The valve core blocks the oil passage. The inlet of the pressure relief channel is communicated with the oil passage. The containing cavity is communicated with the pressure relief port and the outlet of the pressure relief channel. At least a part of the sealing element is located in the pressure relief channel and is close to the outlet of the pressure relief channel. The driving part is connected with the valve core in transmission to drive the valve core to open the oil passage and make the sealing element seal the outlet of the pressure relief channel. The reset part is located in the containing cavity and is connected with the valve core to generate a reset force on the valve core when the driving part drives the valve core to open the oil passage. The valve can simplify the structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid delivery control, and in particular to a valve. BACKGROUND

[0002] The valve is a device for controlling the on-off of fluid delivery, which is often applied to a clutch to control the on-off of liquid flow in the clutch to realize gear switching.

[0003] The valve generally includes a valve sleeve and a valve core, a channel for liquid flow is formed between the valve sleeve and the valve core, and the valve core changes the position in the valve sleeve to block or restore the channel.

[0004] In the related art, the structure of the valve is relatively complex. SUMMARY

[0005] In view of this, the present application provides a valve to simplify the structure.

[0006] Specifically, the technical scheme includes the following:

[0007] The present application provides a valve, which includes a valve core, a valve sleeve, a sealing element, a driving part and a reset part. The valve sleeve has a pressure relief port, and the valve core has a pressure relief channel. Wherein,

[0008] The valve core is located in the valve sleeve and surrounds an oil passage and a containing cavity with the valve sleeve.

[0009] The valve core blocks the oil passage.

[0010] The inlet of the pressure relief channel is in communication with the oil passage.

[0011] The containing cavity is in communication with the pressure relief port and the outlet of the pressure relief channel.

[0012] At least a part of the sealing element is located in the pressure relief channel and is close to the outlet of the pressure relief channel.

[0013] The driving part is in transmission connection with the valve core to drive the valve core to open the oil passage and make the sealing element seal the outlet of the pressure relief channel.

[0014] The reset part is located in the containing cavity and is connected with the valve core to generate a reset force on the valve core when the driving part drives the valve core to open the oil passage.

[0015] Optionally, along the direction of movement of the valve core, the driving part and the pressure relief channel are respectively located at both ends of the valve core.

[0016] Optionally, the pressure relief passage comprises a first section and a second section, the first section is communicated with the oil passage and the second section, the second section is communicated with the accommodating cavity, at least a part of the sealing member is located in the second section and extends along the moving direction of the valve core.

[0017] Optionally, the outlet of the second section and the mounting port are located at two sides adjacent to the valve core respectively, the sealing member extends into the second section from the mounting port of the second section and seals the mounting port of the second section.

[0018] Optionally, the valve core comprises a valve body and a first extension, the valve body is connected with the first extension, the outlet of the second section is located at one side of the first extension, and the valve body, the first extension and the valve sleeve surround the accommodating cavity.

[0019] Optionally, the reset part spirally extends along the extending direction of the second section and connects the valve core and the valve sleeve.

[0020] Optionally, the valve core comprises a first matching part, the valve sleeve comprises a second matching part, the first matching part and the second matching part are located in the oil passage, and the first matching part and the second matching part are located in the oil passage and are sequentially arranged along the direction perpendicular to the moving direction of the valve core.

[0021] Optionally, the valve sleeve has an oil inlet and an oil outlet, the oil passage is communicated with the oil inlet and the oil outlet, the oil inlet and the oil outlet are located at two opposite sides of the first matching part respectively, and the oil inlet is closer to the inlet of the pressure relief passage than the oil outlet.

[0022] Optionally, the valve core comprises a first connecting part, a second connecting part, a first sealing part and a second sealing part, the first sealing part, the first connecting part, the first matching part, the second connecting part and the second sealing part are sequentially connected and located in the valve sleeve along the driving direction of the driving part, the driving part is in transmission connection with the first sealing part, the cross-sectional area of the first connecting part and the cross-sectional area of the second connecting part are smaller than the cross-sectional area of the first sealing part and the cross-sectional area of the second sealing part, the first sealing part forms a first sealing surface with the valve sleeve, and the second sealing part forms a second sealing surface with the valve sleeve.

[0023] Optionally, the valve sleeve has an inner cavity, the first sealing part, the first connecting part, the first matching part, the second connecting part and the second sealing part are located in the inner cavity and form the oil passage between the valve sleeve.

[0024] The technical scheme provided by the embodiment of the present application has at least the following beneficial effects: the oil passage formed between the valve sleeve and the valve core can be used for passing liquid; the valve core can block the oil passage to interrupt the delivery of liquid by the valve; the inlet of the pressure relief passage is communicated with the oil passage, which is conducive to the liquid passing through the pressure relief passage and leaving the valve from the pressure relief port through the accommodating cavity when the liquid is blocked, thereby reducing the impact on the valve core; the driving part drives the valve core to open the oil passage, and simultaneously drives the valve core to make the sealing member seal the outlet of the pressure relief passage, which is conducive to the delivery of liquid through the valve and reduces the leakage of liquid from the pressure relief passage.

[0025] In summary, the valve provided by the present application simplifies the structure of the valve by driving the valve core to control the opening and closing of the oil passage and the pressure relief passage. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 A cross-sectional view of a valve provided by an embodiment of the present application in a closed state;

[0028] Figure 2 A cross-sectional view of a valve provided by an embodiment of the present application in an open state;

[0029] Figure 3 A structural schematic view of a valve sleeve provided by an embodiment of the present application;

[0030] Figure 4 A structural schematic view of a driving part cooperating with a valve core provided by an embodiment of the present application.

[0031] The reference signs in the drawings represent:

[0032] 100, oil passage;

[0033] 200, accommodating cavity;

[0034] 1, valve core; 101, pressure relief passage; 1011, first section; 1012, second section; 111, valve body; 112, first extension; 121, first cooperation part; 122, first connection part; 123, second connection part; 124, first sealing part; 125, second sealing part;

[0035] 2, valve sleeve; 201, pressure relief port; 202, oil inlet; 203, oil outlet; 204, inner cavity; 21, second cooperation part;

[0036] 3. Sealing components;

[0037] 4. Drive unit;

[0038] 5. Reset section.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0042] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0043] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0044] This application provides a valve, such as Figure 1 As shown, the valve includes a valve core 1, a valve sleeve 2, a seal 3, a drive unit 4, and a reset unit 5. The valve sleeve 2 has a pressure relief port 201, and the valve core 1 has a pressure relief channel 101. Wherein,

[0045] The valve core 1 is located inside the valve sleeve 2, and together with the valve sleeve 2, they form an oil passage 100 and a receiving cavity 200.

[0046] Valve core 1 is blocked in oil passage 100.

[0047] The inlet of the pressure relief channel 101 is connected to the oil passage 100.

[0048] The accommodating cavity 200 is connected to the outlet of the pressure relief port 201 and the pressure relief channel 101.

[0049] At least a part of the sealing member 3 is located in the pressure relief channel 101 and is close to the outlet of the pressure relief channel 101.

[0050] The driving part 4 is in transmission connection with the valve core 1 and can drive the valve core 1 to open the oil passage 100 and make the sealing member 3 seal the outlet of the pressure relief channel 101.

[0051] The reset part 5 is located in the accommodating cavity 200 and is connected with the valve core 1 to generate a reset force on the valve core 1 when the driving part 4 drives the valve core 1 to open the oil passage 100.

[0052] It can be understood that the oil passage 100 surrounded by the valve sleeve 2 and the valve core 1 can pass liquid. The valve core 1 blocks the oil passage 100 to interrupt the delivery of the liquid by the valve. The inlet of the pressure relief channel 101 is in communication with the oil passage 100, which is conducive to the liquid passing through the pressure relief channel 101 and leaving the valve from the pressure relief port 201 through the accommodating cavity 200 when the liquid is blocked, reducing the impact on the valve core 1. The driving part 4 drives the valve core 1 to open the oil passage 100, and at the same time, the valve core 1 drives the sealing member 3 to seal the outlet of the pressure relief channel 101, which is conducive to the delivery of the liquid through the valve and reduces the leakage of the liquid from the pressure relief channel 101.

[0053] In the embodiment of the present application, the driving part 4 can be a push rod mechanism, can be a motor, and can also be an electromagnet.

[0054] In the embodiment of the present application, the valve core 1 is located in the valve sleeve 2 and surrounds the oil passage 100 and the accommodating cavity 200 with the valve sleeve 2. The oil passage 100 and the accommodating cavity 200 have certain sealing requirements, so a sealing ring or the like can be added at the position where the valve core 1 and the valve sleeve 2 are connected to form a seal and reduce the leakage of the liquid.

[0055] In the embodiment of the present application, the valve core 1 blocks the oil passage 100. The valve core 1 can contact the oil passage 100 through its structure and shape to divide the oil passage 100 into two or more parts that are not in communication with each other, thereby blocking the oil passage 100. It can be understood that this blockage means that the liquid cannot directly reach from one end of the oil passage 100 to the other end. The blocking effect of the valve core 1 on the oil passage 100 may, although it hinders the driving of the valve core 1 by the driving part 4 or causes a certain degree of leakage of the oil passage 100, be within the range of process design requirements and valve working precision requirements.

[0056] In the embodiment of the present application, the inlet of the pressure relief channel 101 is in communication with the oil passage 100. When the oil passage 100 is blocked by the valve core 1, the liquid entering the oil passage 100 tends to enter the containing cavity 200 through the pressure relief channel 101 instead of leaving the valve from the oil passage 100. The liquid entering the containing cavity 200 can lubricate and cool the reset part 5. Since the reset part 5 generates less heat during operation, the liquid is less affected. Thus, additional components for cooling and lubricating the reset part 5 are not needed, which is beneficial to simplify the structure of the valve of the present application.

[0057] In the embodiment of the present application, the containing cavity 200 is in communication with the pressure relief port 201 and the outlet of the pressure relief channel 101. The containing cavity 200 serves as a cavity in communication with the pressure relief port 201 and the pressure relief channel 101, and also allows the liquid with a certain pressure to enter, thereby playing a buffering role to reduce the pressure of the liquid leaving the pressure relief port 201.

[0058] In the embodiment of the present application, at least a part of the sealing member 3 is located in the pressure relief channel 101 and is close to the outlet of the pressure relief channel 101. The sealing member 3 close to the outlet of the pressure relief channel 101 is beneficial to seal the outlet of the pressure relief channel 101 when the valve core 1 driven by the driving part 4 moves. The sealed outlet of the pressure relief channel 101 makes it difficult for the liquid to pass through the outlet of the pressure relief channel 101, which is beneficial to the liquid tending to leave the valve through the oil passage 100, thereby realizing the transmission of the liquid.

[0059] In the embodiment of the present application, the driving part 4 is in transmission connection with the valve core 1 to drive the valve core 1 to open the oil passage 100 and make the sealing member 3 seal the outlet of the pressure relief channel 101. The valve core 1 opening the oil passage 100 can mean that there is a certain gap between the valve core 1 and the side wall of the oil passage 100, which allows the liquid to pass through and leave the valve from the oil passage 100.

[0060] In the embodiment of the present application, the reset part 5 is located in the containing cavity 200 and is connected with the valve core 1 to generate a reset force on the valve core 1 when the driving part 4 drives the valve core 1 to open the oil passage 100. It can be understood that the reset part 5 can be elastically deformed by abutting against the valve core 1 when the valve core 1 is driven by the driving part 4. The elastic deformation generates an elastic force which is consistent with the driving force of the driving part 4 on the valve core 1 in terms of size but opposite in terms of direction, and generates a reset effect on the valve core 1 when the driving part 4 stops working, so that the valve core 1 tends to return to the position before being driven by the driving part 4.

[0061] Optionally, the reset part 5 can be a spring or the like structure.

[0062] In the embodiment of the present application, the driving force of the driving part 4 on the valve core 1 is contributed to the axis of the sealing member 3.

[0063] In conclusion, the valve of the present application controls the opening and closing of the oil passage 100 and the pressure relief passage 101 by driving the valve core 1, so that the structure of the valve is simplified.

[0064] In some embodiments of the present application, as shown in Figure 1 the driving portion 4 and the pressure relief passage 101 are located at two ends of the valve core 1 along the moving direction of the valve core 1.

[0065] It can be understood that, since the pressure relief passage 101 is located on the valve core 1, the driving portion 4 and the pressure relief passage 101 are located at two ends of the valve core 1, which can avoid interference between the sealing member 3 and the driving portion 4, and is also conducive to arranging the sealing member 3 in the pressure relief passage 101, and when the sealing member 3 is driven by the driving portion 4, the sealing member 3 can be displaced relative to the valve core 1 to seal the outlet of the pressure relief passage 101.

[0066] In some embodiments of the present application, as shown in Figure 2 the pressure relief passage 101 includes a first section 1011 and a second section 1012, the first section 1011 communicates the oil passage 100 and the second section 1012, the second section 1012 communicates with the accommodating cavity 200, and at least a part of the sealing member 3 is located in the second section 1012 and extends along the moving direction of the valve core 1.

[0067] It can be understood that the first section 1011 can be used for the liquid in the oil passage 100 to enter. The cross-sectional area of the passage of the first section 1011 is smaller than that of the second section 1012, which is conducive to arranging the sealing member 3 in the pressure relief passage 101, and on the other hand, by setting the first section 1011 and the second section 1012 with different cross-sectional areas, it is conducive to buffering the pressure from the liquid.

[0068] In the embodiments of the present application, the first section 1011 can include sub-flow sections forming an included angle, which is conducive to buffering the liquid entering the first section 1011. Alternatively, the two sub-flow sections form an included angle of 90°.

[0069] In the embodiments of the present application, the cross-sectional area of the sealing member 3 is greater than the cross-sectional area of the passage of the first section 1011, which is conducive to limiting the sealing member 3 when it is in contact with the outlet of the first section 1011.

[0070] In some embodiments of the present application, as shown in Figure 1 and Figure 2 the outlet of the second section 1012 and the mounting hole are located at two adjacent sides of the valve core 1, the sealing member 3 extends into the second section 1012 from the mounting hole of the second section 1012 and seals the mounting hole of the second section 1012.

[0071] It can be understood that the outlet of the second section 1012 can be provided for the liquid to pass into the containing cavity 200. The mounting opening of the second section 1012 can be provided for the sealing member 3 to extend into, and the sealing member 3 seals the mounting opening of the second section 1012, so as to avoid the liquid from leaking from the mounting opening of the second section 1012. The outlet and the mounting opening of the second section 1012 are located at two sides adjacent to the spool 1 respectively, which is beneficial to the movement of the second section 1012 relative to the sealing member 3 when the spool 1 is driven by the driving part 4. The outlet of the moving second section 1012 can be covered by the sealing member 3 to achieve sealing.

[0072] In the embodiment of the present application, the mounting opening of the second section 1012 is located at an end of the second section 1012, and the outlet of the second section 1012 is located at a side of the second section 1012 along the direction in which the spool 1 moves.

[0073] In the embodiment of the present application, the outlet of the second section 1012 is the outlet of the pressure relief channel 101. It can be understood that when the driving part 4 works, the driving force generated by the driving part 4 is equal to the sum of the pressure of the liquid in the second section 1012 and the restoring force of the restoring part 5. The size of the restoring force generally depends on the displacement of the spool 1 driven by the driving part 4, that is, the greater the displacement of the spool 1, the greater the restoring force.

[0074] In some embodiments of the present application, as shown in Figure 2 The spool 1 comprises a valve body 111 and a first extension 112, the valve body 111 is connected with the first extension 112, the outlet of the second section 1012 is located at a side of the first extension 112, and the valve body 111, the first extension 112 and the valve sleeve 2 surround the containing cavity 200.

[0075] It can be understood that the valve body 111 can be used to block the oil passage 100 and interrupt the delivery of the liquid. The first extension 112 has a certain volume, which is beneficial to the valve body 111, the first extension 112 and the valve sleeve 2 to surround the containing cavity 200, and then beneficial to the liquid passing through the pressure relief channel 101 to enter the containing cavity 200.

[0076] In the embodiment of the present application, the cross-sectional area of the valve body 111 is greater than the cross-sectional area of the first extension 112.

[0077] In the embodiment of the present application, the mounting opening of the second section 1012 is oriented in the same direction as the moving direction of the spool 1, and the sealing member 3 seals the mounting opening of the second section 1012, so as to be in contact with the side wall of the second section 1012. This contact can cause the pressure between the sealing member 3 and the side wall of the second section 1012. Therefore, the axis of the first extension 112 is arranged to be collinear with the driving force generated by the driving part 4 on the spool 1, which can avoid the instability of the spool 1 when the driving force and the pressure act on the spool 1 together, and thus is beneficial to improve the driving stability of the driving part 4 on the spool 1.

[0078] In some embodiments of the present application, as shown in Figure 1 the reset part 5 extends helically along the extension direction of the second section 1012 and connects the valve core 1 and the valve sleeve 2.

[0079] It can be understood that the helically extending reset part 5 can be extruded by the valve body 111 when the valve body 111 is driven by the driving part 4. The extruded and deformed reset part 5 can generate a certain reset force to help the valve core 1 complete reset when the driving part 4 is not working.

[0080] In embodiments of the present application, the material of the reset part 5 can be spring steel or other materials that can be elastically deformed.

[0081] In some embodiments of the present application, as shown in Figure 3 and Figure 4 the valve core 1 comprises a first matching part 121, the valve sleeve 2 comprises a second matching part 21, the first matching part 121 and the second matching part 21 are located in the oil channel 100, and the first matching part 121 and the second matching part 21 are located in the oil channel 100 and are arranged in sequence in the direction perpendicular to the movement of the valve core 1.

[0082] It can be understood that the first matching part 121 and the second matching part 21 are arranged in sequence in the direction perpendicular to the movement of the valve core 1, so that when the valve core 1 drives the first matching part 121 to move, the first matching part 121 can cooperate with the second matching part 21 to block the oil channel 100. Specifically, when the first matching part 121 and the second matching part 21 are in contact, there is no path for the liquid to pass through the oil channel 100, so that the blockage is formed. When the first matching part 121 and the second matching part 21 are separated, the blocking effect of the liquid by the two parts disappears, and the liquid can pass through the oil channel 100 to leave the valve.

[0083] In embodiments of the present application, the first matching part 121 is cylindrical, and the second matching part 21 is annular, and the first matching part 121 is in contact with the second matching part 21 on the inner side of the second matching part 21.

[0084] In some embodiments of the present application, as shown in Figure 1 the valve sleeve 2 has an oil inlet 202 and an oil outlet 203, the oil channel 100 communicates the oil inlet 202 and the oil outlet 203, the oil inlet 202 and the oil outlet 203 are located on opposite sides of the first matching part 121, and the oil inlet 202 is closer to the inlet of the pressure relief channel 101 than the oil outlet 203.

[0085] Understandably, the oil inlet 202 can be connected to oil supply components such as an oil pump. The oil outlet 203 can be connected to components that require liquid. The oil passage 100 connects the oil inlet 202 and the oil outlet 203, allowing liquid to be delivered to the components that require liquid through the oil supply components. The oil inlet 202 is closer to the inlet of the pressure relief passage 101 than the oil outlet 203. This allows liquid to directly enter the pressure relief passage 101 through its inlet when the valve core 1 blocks the oil passage 100, without being blocked by the first mating part 121 and the second mating part 21. This avoids the impact caused by liquid backflow due to valve closure in oil supply components such as the oil pump.

[0086] In this embodiment, the valve operates in two ways, specifically:

[0087] 1. When the valve is closed

[0088] like Figure 2 As shown, when the drive unit 4 is not working, the oil passage 100 is blocked by the valve core 1, and the sealing part exposes the outlet of the pressure relief passage 101. The liquid enters the oil passage 100 through the oil inlet 202, but cannot leave the oil passage 100 through the oil outlet 203. It can only enter the receiving cavity 200 through the pressure relief passage 101, and leave the valve through the pressure relief port 201 after passing through the receiving cavity 200.

[0089] 2. When the valve is opened

[0090] like Figure 1 As shown, when the drive unit 4 is working, the drive unit 4 drives the valve core 1 to move towards the seal 3 until the outlet of the pressure relief channel 101 is sealed by the seal 3. At this time, the oil passage 100 is opened, and the liquid enters the oil passage 100 through the oil inlet 202 and enters the oil outlet 203 through the oil passage 100, leaving the valve.

[0091] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, the valve core 1 includes a first connecting part 122, a second connecting part 123, a first sealing part 124, and a second sealing part 125. The first sealing part 124, the first connecting part 122, the first mating part 121, the second connecting part 123, and the second sealing part 125 are all located inside the valve sleeve 2 and are connected sequentially along the driving direction of the driving part 4. The driving part 4 is connected to the first sealing part 124 in a driving manner. The cross-sectional area of ​​the first connecting part 122 and the cross-sectional area of ​​the second connecting part 123 are both smaller than the cross-sectional area of ​​the first sealing part 124 and smaller than the cross-sectional area of ​​the second sealing part 125. A first sealing surface is formed between the first sealing part 124 and the valve sleeve 2, and a second sealing surface is formed between the second sealing part 125 and the valve sleeve 2.

[0092] It can be understood that the cross-sectional area of the first connecting portion 122 and the cross-sectional area of the second connecting portion 123 are both smaller than the cross-sectional area of the first sealing portion 124 and the cross-sectional area of the second sealing portion 125, and can form a continuous oil channel 100 with the valve sleeve 2, thus facilitating the delivery of the liquid. The first sealing portion 124 forms a first sealing surface with the valve sleeve 2, and the second sealing portion 125 forms a second sealing surface with the valve sleeve 2, which can improve the sealing performance of the oil channel 100 and reduce the leakage of the liquid from the joint between the valve core 1 and the valve sleeve 2.

[0093] In the embodiments of the present application, during the movement of the valve core 1 relative to the valve sleeve 2, the first sealing portion 124 and the second sealing portion 125 both remain in contact with the valve sleeve 2, thus maintaining the sealing effect of the first sealing surface and the second sealing surface; the first fitting portion 121 can only be in contact with the second fitting portion 21 and cannot be in contact with other structures of the valve sleeve 2, and the first connecting portion 122 and the second connecting portion 123 are both not in contact with the valve sleeve 2, so as to keep the oil channel 100 unobstructed.

[0094] In the embodiments of the present application, the first connecting portion 122, the second connecting portion 123, the first sealing portion 124 and the second sealing portion 125 can all be cylindrical.

[0095] In some embodiments of the present application, as shown in Figure 3 and Figure 4 , the valve sleeve 2 has an inner cavity 204, and the first sealing portion 124, the first connecting portion 122, the first fitting portion 121, the second connecting portion 123 and the second sealing portion 125 are all located in the inner cavity 204 and form the oil channel 100 with the valve sleeve 2.

[0096] It can be understood that the inner cavity 204 can accommodate the valve core 1 and is also conducive to forming a sealed environment for the oil channel 100.

[0097] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited.

[0098] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses or adaptive changes of the present application following the general principles of the present application and including those commonly known or customary within the technical field of the present application. The specification and examples are only considered as exemplary.

[0099] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the claims appended hereto.

Claims

1. A valve, characterized in that The valve comprises a valve core (1), a valve sleeve (2), a sealing member (3), a driving part (4) and a reset part (5), the valve sleeve (2) has a pressure relief port (201), the valve core (1) has a pressure relief channel (101), wherein, The valve core (1) is located in the valve sleeve (2) and forms an oil passage (100) and a containing cavity (200) with the valve sleeve (2); The valve core (1) blocks the oil passage (100); The inlet of the pressure relief channel (101) communicates with the oil passage (100); The containing cavity (200) communicates the pressure relief port (201) and the outlet of the pressure relief channel (101); At least a part of the sealing member (3) is located in the pressure relief channel (101) and is close to the outlet of the pressure relief channel (101); The driving part (4) is in transmission connection with the valve core (1) to drive the valve core (1) to open the oil passage (100) and make the sealing member (3) seal the outlet of the pressure relief channel (101); The reset part (5) is located in the containing cavity (200) and is connected with the valve core (1) to generate a reset force on the valve core (1) when the driving part (4) drives the valve core (1) to open the oil passage (100).

2. The valve of claim 1, wherein The driving part (4) and the pressure relief channel (101) are located at two ends of the valve core (1) in the direction of movement of the valve core (1).

3. The valve of claim 2, wherein The pressure relief channel (101) comprises a first section (1011) and a second section (1012), the first section (1011) communicates the oil passage (100) and the second section (1012), the second section (1012) communicates with the containing cavity (200), and at least a part of the sealing member (3) is located in the second section (1012) and extends in the direction of movement of the valve core (1).

4. The valve of claim 3, wherein The outlet of the second section (1012) and the mounting port are located at two sides adjacent to the valve core (1), the sealing member (3) extends into the second section (1012) from the mounting port of the second section (1012) and seals the mounting port of the second section (1012).

5. The valve of claim 4, wherein The valve core (1) comprises a valve body (111) and a first extension (112), the valve body (111) is connected with the first extension (112), the outlet of the second section (1012) is located at one side of the first extension (112), and the valve body (111), the first extension (112) and the valve sleeve (2) form the containing cavity (200).

6. The valve of claim 3, wherein The reset part (5) spirally extends along the extension direction of the second section (1012) and connects the valve core (1) and the valve sleeve (2).

7. The valve of claim 1, wherein The valve core (1) comprises a first matching part (121), the valve sleeve (2) comprises a second matching part (21), the first matching part (121) and the second matching part (21) are located in the oil channel (100), and the first matching part (121) and the second matching part (21) are sequentially arranged in the direction perpendicular to the movement of the valve core (1).

8. The valve of claim 7, wherein The valve sleeve (2) has an oil inlet (202) and an oil outlet (203), the oil channel (100) communicates the oil inlet (202) and the oil outlet (203), the oil inlet (202) and the oil outlet (203) are located on the opposite sides of the first matching part (121), and the oil inlet (202) is closer to the inlet of the pressure relief channel (101) than the oil outlet (203).

9. The valve of claim 7, wherein The valve core (1) comprises a first connecting part (122), a second connecting part (123), a first sealing part (124) and a second sealing part (125), the first sealing part (124), the first connecting part (122), the first matching part (121), the second connecting part (123) and the second sealing part (125) are sequentially connected in the driving direction of the driving part (4) and are located in the valve sleeve (2), the driving part (4) is in driving connection with the first sealing part (124), the cross-sectional area of the first connecting part (122) and the cross-sectional area of the second connecting part (123) are smaller than the cross-sectional area of the first sealing part (124) and the cross-sectional area of the second sealing part (125), the first sealing part (124) and the valve sleeve (2) form a first sealing surface, and the second sealing part (125) and the valve sleeve (2) form a second sealing surface.

10. The valve of claim 9, wherein The valve sleeve (2) has an inner cavity (204), the first sealing part (124), the first connecting part (122), the first matching part (121), the second connecting part (123) and the second sealing part (125) are located in the inner cavity (204) and form the oil channel (100) between the valve sleeve (2).

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