Piston structure, sliding block assembly, and reversing valve

Abstract

A piston structure (100), a sliding block assembly, and a reversing valve. The piston structure (100) comprises a piston assembly (10) and a first fastener (20). The first fastener (20) comprises a head (21), a screw (22), and a rotation stopping protrusions (23). The piston assembly (10) is provided with rotation stopping grooves (102), and when the first fastener (20) locks the piston assembly (10) to a guide frame (200), the rotation stopping protrusions (23) are snap-fitted in the rotation stopping grooves (102) to prevent the first fastener (20) from rotating in an unscrewing direction of the screw (22); alternatively, the piston assembly (10) is provided with mating protrusions (24), and when the first fastener (20) locks the piston assembly (10) to the guide frame (200), the rotation stopping protrusions (23) and the mating protrusions (24) are coupled to each other to prevent the first fastener (20) from rotating in the unscrewing direction of the screw (22).

Description

Piston structure, slider assembly and reversing valve

[0001] Related applications

[0002] This application claims priority to Chinese patent applications filed on March 4, 2024, with application number 202420415778.8, entitled “Piston structure, slider assembly and reversing valve”, and Chinese patent applications filed on March 4, 2024, with application number 202410240853.6, entitled “Threaded connection structure and four-way valve”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of valve technology, and in particular to a piston structure, a slider assembly and a reversing valve. Background Art

[0004] In the air conditioning system, the reversing valve drives the slider to move through the guide frame inside the valve body, so that the slider can connect to different pipes, thereby switching the flow direction of the refrigerant to change the cooling and heating mode of the air conditioning system.

[0005] In related technologies, piston structures are connected to both ends of the guide frame, flexibly cooperating with the valve body to facilitate movement of the guide frame through pressure differentials. The piston structure is typically connected to the guide frame via screws or other threaded connections. However, when the reversing valve is used in air conditioning systems subject to extreme vibration, the screws can become loose due to the excessive vibration, potentially leading to failure of the connection between the piston structure and the guide frame. Summary of the Invention

[0006] Based on this, it is necessary to provide a piston structure, a slider assembly and a reversing valve.

[0007] The present application provides a piston structure, which includes a piston assembly and a first fastener, wherein the piston assembly is provided with a through hole, and the first fastener includes a head and a screw, wherein the screw is connected to one end of the head and passes through the through hole, and is used to thread the piston assembly to the guide frame; the first fastener also includes a rotation-stopping protrusion, which protrudes and is connected to the end surface of the head near the screw; wherein,

[0008] The piston assembly is further provided with a rotation-stop groove. When the first fastener locks the piston assembly to the guide frame, the rotation-stop protrusion can be locked in the rotation-stop groove to prevent the first fastener from rotating in the screw-out direction of the screw rod; or

[0009] The piston assembly is further provided with a matching protrusion. When the first fastener locks the piston assembly to the guide frame, the anti-rotation protrusion can be coupled with the matching protrusion to prevent the first fastener from rotating along the screw-out direction of the screw.

[0010] In one embodiment, the anti-rotation protrusion extends along the circumference of the first fastener, and the two ends of the anti-rotation protrusion along the circumference of the first fastener are defined as the first end and the second end respectively; along the screw-in direction of the screw rod, and from the first end to the second end, the vertical distance between the surface of the anti-rotation protrusion away from the head and the head gradually decreases.

[0011] In one embodiment, along the radial direction of the first fastener, the anti-rotation protrusion has an inner side and an outer side, the inner side is connected to the screw rod, and / or the outer side is arranged flush with the side surface of the head.

[0012] In one embodiment, there are multiple anti-rotation protrusions, and the multiple anti-rotation protrusions are distributed along the circumference of the first fastener; wherein the first end portion of each anti-rotation protrusion is correspondingly clamped in one of the anti-rotation grooves.

[0013] In one embodiment, along the circumference of the first fastener, the second end portion of one of the anti-rotation protrusions is connected to the first end portion of another of the anti-rotation protrusions.

[0014] In one embodiment, there are a plurality of through holes, and the plurality of through holes are arranged at intervals on the piston assembly; wherein the number of the first fasteners is arranged in a one-to-one correspondence with the number of the through holes.

[0015] In one embodiment, the piston assembly includes a piston body and an outer baffle, wherein the outer baffle is arranged on a side of the piston body away from the guide frame; the outer baffle is provided with a connecting hole, and the piston body is provided with a matching hole, and the piston structure also includes a second fastener, which passes through the connecting hole and the matching hole to connect the outer baffle and the piston body; wherein the through hole passes through the outer baffle and the piston body.

[0016] In one embodiment, there are multiple connecting holes, and the multiple connecting holes are arranged at intervals along the circumference of the piston assembly; wherein the number of the matching holes and the second fasteners are arranged in a one-to-one correspondence with the number of the connecting holes.

[0017] In one embodiment, the head, the screw and the anti-rotation protrusion are an integrally formed structure; or, the anti-rotation protrusion is a cutting piece.

[0018] In one embodiment, the anti-rotation protrusion is configured as a first wedge-shaped protrusion, and the mating protrusion is configured as a second wedge-shaped protrusion; a plurality of the first wedge-shaped protrusions and the second wedge-shaped protrusions are provided; the plurality of the first wedge-shaped protrusions and the plurality of the second wedge-shaped protrusions are arranged along the circumference of the threaded structure, and the corresponding first wedge-shaped protrusions are coupled with the second wedge-shaped protrusions.

[0019] In one embodiment, the first wedge-shaped protrusion has a first helical surface, the second wedge-shaped protrusion has a second helical surface, and the first helical surface fits in with the second helical surface.

[0020] In one embodiment, the first helical surface, the second helical surface and the helical line of the thread structure have the same rotation direction.

[0021] In one embodiment, the number of the first wedge-shaped protrusions is the same as the number of the second wedge-shaped protrusions, and the plurality of first wedge-shaped protrusions are coupled to the plurality of second wedge-shaped protrusions in a one-to-one correspondence.

[0022] In one embodiment, each of the first wedge-shaped protrusions has a first tip and a first thick end; along the circumference of the thread structure, the adjacent first tips and the first thick ends of two adjacent first wedge-shaped protrusions are connected; each of the second wedge-shaped protrusions has a second tip and a second thick end; along the circumference of the thread structure, the adjacent second tips and the second thick ends of two adjacent second wedge-shaped protrusions are connected.

[0023] In one embodiment, the first wedge-shaped protrusion and the second wedge-shaped protrusion extend along the circumference of the thread structure.

[0024] In one embodiment, a surface of the head connected to the screw rod is provided with a plurality of first wedge-shaped protrusions, and the plurality of first wedge-shaped protrusions surround the outer circumference of the screw rod; the piston assembly includes a first gasket and a part to be connected, the first gasket includes a first base plate and a plurality of second wedge-shaped protrusions, the first base plate has a first through hole, the first through hole passes through the first base plate, and the plurality of second wedge-shaped protrusions are provided on the surface of the first base plate facing the head side and surround the periphery of the first through hole; the second wedge-shaped protrusions are used to stop the first wedge-shaped protrusions in the screwing-out direction; the screw rod passes through the first through hole and the part to be connected, and the piston assembly is threadedly locked to the guide frame.

[0025] In one embodiment, a first elastic member is further included, wherein the first elastic member is provided between the first substrate and the member to be connected, and is used to provide an elastic force to the first gasket away from the member to be connected.

[0026] In one embodiment, the part to be connected includes a piston body and an outer baffle, the piston body is provided with a first through-hole corresponding to the position of the first through-hole, and the outer baffle is provided with a first through-hole corresponding to the position of the first through-hole; the screw passes through the first through-hole, the first through-hole and the first through-hole and is threadedly connected to the guide frame.

[0027] In one embodiment, the head includes a cap body and a second gasket, one end of the screw rod passes through the second gasket and is connected to the cap body, and the piston assembly includes a third gasket and a part to be connected; the second gasket includes a second substrate and a plurality of the first wedge-shaped protrusions, and the third gasket includes a third substrate and a plurality of the second wedge-shaped protrusions, the second substrate has a second through-hole, and the second through-hole passes through the second substrate, the third substrate has a third through-hole, and the third through-hole passes through the third substrate, and the surfaces facing each other of the second substrate and the third substrate are respectively provided with a plurality of the first wedge-shaped protrusions and a plurality of the second wedge-shaped protrusions, a plurality of the first wedge-shaped protrusions surround the periphery of the second through-hole, and a plurality of the second wedge-shaped protrusions surround the periphery of the third through-hole; the screw rod passes through the second through-hole, the third through-hole and the part to be connected to thread the piston assembly to the guide frame.

[0028] In one embodiment, a third elastic member is further included, and the third elastic member is provided between the third substrate and the member to be connected, and is used to provide an elastic force to the third gasket away from the member to be connected.

[0029] In one embodiment, the cap body is located on the side of the second gasket facing away from the third gasket; the piston structure also includes a second elastic member, which is arranged between the cap body and the second substrate, and is used to provide an elastic force to the cap body and the screw away from the part to be connected.

[0030] In one embodiment, the part to be connected includes a piston body and an outer baffle, the piston body is provided with a first through-hole corresponding to the position of the second through-hole and the third through-hole, and the outer baffle is provided with a second through-hole corresponding to the position of the second through-hole and the third through-hole; the screw passes through the second through-hole, the third through-hole, the first through-hole and the second through-hole and is threadedly connected to the guide frame.

[0031] The present application also provides a slider assembly, including a slider, a guide frame and the above-mentioned piston structure, wherein the guide frame is sleeved on the circumference of the slider and connected to the slider, and the piston structure is connected to the opposite ends of the guide frame.

[0032] The present application also provides a reversing valve, comprising a valve body and the above-mentioned slider assembly, wherein the valve body has a valve cavity, and the slider assembly is movably disposed in the valve cavity.

[0033] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to better describe and illustrate the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the accompanying drawings should not be considered to limit the scope of the disclosed inventions, the presently described embodiments and / or examples, and any of the best modes currently understood for these inventions.

[0035] FIG1 is a connection diagram of a piston structure according to an embodiment of the present application.

[0036] FIG2 is an enlarged view of point A in FIG1 .

[0037] FIG3 is an exploded view of a piston structure according to an embodiment of the present application.

[0038] FIG4 is a schematic structural diagram of a first fastener according to an embodiment of the present application.

[0039] FIG5 is a side view of a first fastener according to an embodiment of the present application.

[0040] FIG6 is a cross-sectional view taken along line BB in FIG5 .

[0041] FIG7 is a schematic diagram of a piston structure according to an embodiment of the present application.

[0042] FIG8 is an exploded schematic diagram of FIG7 from a different perspective.

[0043] FIG9 is an exploded schematic diagram of FIG7 from another perspective.

[0044] FIG10 is a schematic structural diagram of the first fastener in FIG7 .

[0045] FIG11 is a schematic diagram of the first gasket in FIG7 .

[0046] FIG12 is an exploded schematic diagram of a piston structure according to an embodiment of the present application.

[0047] FIG13 is a schematic diagram of a piston structure according to an embodiment of the present application.

[0048] FIG14 is an exploded schematic diagram of the piston structure in FIG13 .

[0049] FIG15 is a schematic structural diagram of the first fastener, the second gasket and the third gasket in FIG13.

[0050] FIG16 is a schematic diagram of an exploded view of a piston structure according to an embodiment of the present application.

[0051] FIG17 is a cross-sectional view of a reversing valve according to an embodiment of the present application.

[0052] The symbols in the figure represent the following meanings: 100, piston structure; 10, piston assembly; 101, through hole; 102, anti-rotation groove; 103, to-be-connected member; 11, piston body; 111, matching hole; 112, first through hole; 12, outer baffle; 121, connecting hole; 122, second through hole; 20, first fastener; 21, head; 211, cap body; 400b, second gasket; 22, screw; 23, anti-rotation protrusion; 231, first end portion; 232, second end portion; 233, inner side; 234, outer side; 24, matching protrusion; 30, second fastener; 410, first wedge-shaped protrusion; 4101, first tip; 4102, first thick end; 4103, first helical surface; 400a, first gasket; 400c, third gasket; 410a, first substrate; 411a, first via hole; 410b, second substrate; 411b, second via hole; 410c, third substrate; 411c, third via hole; 420, second wedge-shaped protrusion; 421, second tip; 422, second thick end; 423, second helical surface; 510, first elastic member; 520, second elastic member; 530, third elastic member; 200, guide frame; 210, threaded hole. DETAILED DESCRIPTION

[0053] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0054] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0055] 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 defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0056] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0058] In the air conditioning system, the reversing valve drives the slider to move through the guide frame inside the valve body, so that the slider can connect to different pipes, thereby switching the flow direction of the refrigerant to change the cooling and heating mode of the air conditioning system.

[0059] In related technologies, pistons are connected to both ends of the guide frame, flexibly cooperating with the valve body to facilitate movement of the guide frame through pressure differentials. The pistons are typically connected to the guide frame via screws or other threaded connections. However, when the reversing valve is used in air conditioning systems subject to extreme vibration, the screws can become loose due to the excessive vibration, potentially leading to failure of the connection between the piston and the guide frame.

[0060] Referring to Figures 1-6 , to address the problem of existing piston structures and guide frames being susceptible to failure or loosening of the screw threaded connection when subjected to significant vibration, the present application provides a piston structure 100 movably disposed within the valve cavity of a reversing valve for sealing engagement with the inner wall of the valve cavity. The piston structure 100 includes a piston assembly 10 and a first fastener 20 . The piston assembly 10 defines a through-hole 101 . The first fastener 20 includes a head 21 and a screw 22 . The screw 22 is connected to one end of the head 21 and extends through the through-hole 101 , for threading the piston assembly 10 to the guide frame 200 .

[0061] Furthermore, as shown in Figures 2 to 6, the first fastener 20 further includes a rotation-stopping protrusion 23, which protrudes from and is connected to the end surface of the head 21 near the screw 22. The piston assembly 10 further includes a rotation-stopping groove 102. When the first fastener 20 locks the piston assembly 10 to the guide frame 200, the rotation-stopping protrusion 23 can be locked in the rotation-stopping groove 102 to prevent the first fastener 20 from rotating in the direction of screwing out the screw 22. Alternatively, the piston assembly 10 further includes a mating protrusion 24. When the first fastener 20 locks the piston assembly 10 to the guide frame 200, the rotation-stopping protrusion 23 can couple with the mating protrusion 24 to prevent the first fastener 20 from rotating in the direction of screwing out the screw 22.

[0062] It is understood that by providing the anti-rotation protrusion 23 on the first fastener 20 and providing the anti-rotation groove 102 or the matching protrusion 24 on the piston assembly 10, when the first fastener 20 rotates in the screw-in direction of the screw rod 22, the anti-rotation protrusion 23 on the first fastener 20 can be retained in the anti-rotation groove 102 of the piston assembly 10 or be engaged and coupled with the matching protrusion 24. The engaging arrangement between the anti-rotation protrusion 23 and the anti-rotation groove 102 or the engaging coupling between the anti-rotation protrusion 23 and the matching protrusion 24 prevents the first fastener 20 from rotating in the screw-out direction of the screw rod 22, thereby achieving the first fastener 20 locking the piston assembly 10 to the guide frame 200. Furthermore, when the piston assembly 10 is vibrated and causes the first fastener 20 to have a tendency to rotate in the unscrewing direction, the groove wall or the mating protrusion 24 of the anti-rotation groove 102 can act as a stop for the anti-rotation protrusion 23 on the first fastener 20, thereby limiting the rotation of the first fastener 20 and preventing the first fastener 20 from loosening, thereby greatly improving the connection reliability of the first fastener 20.

[0063] Furthermore, in one embodiment, the first fastener 20 is provided with a rotation-stopping protrusion 23, and the piston assembly 10 is provided with a rotation-stopping groove 102. The rotation-stopping protrusion 23 and the rotation-stopping groove 102 are screwed together to prevent the first fastener 20 from loosening.

[0064] Furthermore, the anti-rotation protrusion 23 extends circumferentially along the first fastener 20, with the two ends of the anti-rotation protrusion 23 along the circumference of the first fastener 20 being defined as a first end 231 and a second end 232. As the screw 22 is screwed in, and from the first end 231 to the second end 232, the vertical distance between the surface of the anti-rotation protrusion 23 away from the head 21 and the head 21 gradually decreases.

[0065] It can be understood that, since the vertical distance between the surface of the anti-rotation protrusion 23 away from the head 21 and the head 21 gradually decreases along the screwing direction of the screw rod 22 and from the first end 231 to the second end 232, when the first fastener 20 locks the piston assembly 10 to the guide frame 200, it can avoid that other parts of the anti-rotation protrusion 23 are abutting against the end face of the piston assembly 10, thereby ensuring that the part of the first end 231 of the anti-rotation protrusion 23 away from the head 21 can smoothly extend into the anti-rotation groove 102, realize cooperation with the anti-rotation groove 102, and greatly reduce the difficulty of screwing the first fastener 20.

[0066] Specifically, when the first fastener 20 is about to be locked, the anti-rotation protrusion 23 on the first fastener 20 will interfere with the end surface of the piston assembly 10 and be located close to the corresponding anti-rotation groove 102. At this time, if the first fastener 20 is further rotated in the screwing direction, the first end 231 of the anti-rotation protrusion 23 can be locked in the anti-rotation groove 102 to achieve the anti-slip effect.

[0067] In other embodiments, a rotation-stopping protrusion 23 with a smaller width along the circumference of the first fastener 20 may be directly used, as long as the rotation-stopping protrusion 23 and the rotation-stopping groove 102 can be matched in a limited manner.

[0068] In one embodiment, as shown in FIG. 4 and FIG. 6 , along the radial direction of the first fastener 20 , the anti-rotation protrusion 23 has an inner side 233 and an outer side 234 , and the inner side 233 is connected to the screw rod 22 .

[0069] In this way, the connection strength between the anti-rotation protrusion 23 and the screw 22 is improved, and the possibility of the anti-rotation protrusion 23 breaking is greatly reduced.

[0070] Correspondingly, the anti-rotation groove 102 extends to the through hole 101 and communicates with the through hole 101, so as to better cooperate and abut with the anti-rotation protrusion 23.

[0071] Furthermore, in one embodiment, the outer side 234 of the anti-rotation protrusion 23 is flush with the side surface of the head 21. This effectively increases the radial width of the anti-rotation protrusion 23 along the first fastener 20, resulting in a larger contact area between the first end 231 of the anti-rotation protrusion 23 and the sidewall of the anti-rotation groove 102, thereby improving the reliability of the stop. At the same time, the connection strength between the anti-rotation protrusion 23 and the head 21 is further enhanced.

[0072] Furthermore, in one embodiment, the head 21, the screw 22, and the anti-rotation protrusion 23 are integrally formed, which further improves the connection strength of the anti-rotation protrusion 23 and ensures the overall structural strength of the first fastener 20. In addition, the processing steps are reduced, which can effectively improve the processing efficiency.

[0073] However, the present invention is not limited thereto. In other embodiments, the anti-rotation protrusion 23 may also be a cutting piece. For example, the anti-rotation protrusion 23 of the desired shape is cut at a corresponding position on the head 21, which is simple to form.

[0074] In one embodiment, as shown in Figures 4 and 5 , there are multiple anti-rotation protrusions 23 distributed along the circumference of the first fastener 20. The first end 231 of each anti-rotation protrusion 23 is correspondingly engaged with a corresponding anti-rotation groove 102. Thus, the multiple anti-rotation protrusions 23 and the multiple anti-rotation grooves 102 cooperate with each other, achieving a better retaining effect, further preventing the first fastener 20 from rotating and improving the locking stability of the first fastener 20.

[0075] As a preferred solution, a plurality of anti-rotation protrusions 23 are evenly distributed along the circumference of the first fastener 20 to improve the uniformity of force.

[0076] It should be noted that the number of anti-rotation grooves 102 may not correspond one-to-one to the number of anti-rotation protrusions 23, that is, the number of anti-rotation grooves 102 may be greater than or equal to the number of anti-rotation protrusions 23, as long as the anti-rotation protrusions 23 can be clamped in the anti-rotation grooves 102.

[0077] Furthermore, in one embodiment, along the circumference of the first fastener 20, the second end 232 of one anti-rotation protrusion 23 is connected to the first end 231 of another anti-rotation protrusion 23. In this way, under the same spatial conditions, the number of anti-rotation protrusions 23 can be further increased, thereby improving the limiting effect of the anti-rotation protrusions 23 and the anti-rotation groove 102.

[0078] In one embodiment, as shown in Figures 1 and 3, multiple through-holes 101 are provided, spaced apart on the piston assembly 10. The number of first fasteners 20 corresponds to the number of through-holes 101. This further enhances the connection strength between the piston assembly 10 and the guide frame 200, improving the connection stability of the piston assembly 10.

[0079] Specifically, the piston assembly 10 includes a piston body 11 and an outer baffle 12. The outer baffle 12 is disposed on the side of the piston body 11 away from the guide frame 200. A through hole 101 extends through the outer baffle 12 and the piston body 11. In this embodiment, two through holes 101 are provided, and the two through holes 101 are rotationally symmetrically arranged about the axis of the piston assembly 10.

[0080] In order to improve the connection stability between the piston body 11 and the outer baffle 12, in one embodiment, as shown in Figure 3, the outer baffle 12 is provided with a connecting hole 121, and the piston body 11 is provided with a matching hole 111. The piston structure 100 also includes a second fastener 30, which passes through the connecting hole 121 and the matching hole 111 to connect the outer baffle 12 and the piston body 11.

[0081] Furthermore, in one embodiment, a plurality of connection holes 121 are provided, and the plurality of connection holes 121 are spaced apart along the circumference of the piston assembly 10. The number of mating holes 111 and the number of second fasteners 30 correspond to the number of connection holes 121. This further enhances the connection strength between the piston body 11 and the outer baffle 12.

[0082] Specifically, in this embodiment, the number of the connecting holes 121 and the matching holes 111 are both two. However, the present invention is not limited thereto. In other embodiments, the number of the connecting holes 121 and the matching holes 111 can also be set to three, four, or more, which are not listed here.

[0083] Furthermore, the present application also provides some other embodiments, the inventive concepts and most of the structures of these embodiments are the same as those of the above embodiments, except that the first fastener 20 is prevented from loosening by means of protrusions snapping / coupling with each other, rather than by means of protrusions snapping with each other and grooves.

[0084] As shown in Figures 7 to 17, the first fastener 20 is provided with a rotation-stopping protrusion 23, and the piston assembly 10 is provided with a matching protrusion 24. The rotation-stopping protrusion 23 and the matching protrusion 24 are engaged by spirally approaching each other, thereby preventing the first fastener 20 from loosening.

[0085] The piston structure 100 includes a first fastener 20 and a piston assembly 10. The anti-rotation protrusion 23 is configured as a first wedge-shaped protrusion 410, and the mating protrusion 24 is configured as a second wedge-shaped protrusion 420. Multiple first wedge-shaped protrusions 410 and multiple second wedge-shaped protrusions 420 are provided, that is, the first fastener 20 has multiple first wedge-shaped protrusions 410 (see Figure 10), and the piston assembly 10 has multiple second wedge-shaped protrusions 420 (see Figure 11). The first fastener 20 and the piston assembly 10 are connected via a threaded structure. The multiple first wedge-shaped protrusions 410 and the multiple second wedge-shaped protrusions 420 are arranged along the circumference of the threaded structure, and the multiple first wedge-shaped protrusions 410 and the multiple second wedge-shaped protrusions 420 are coupled.

[0086] In this manner, after the first fastener 20 of the piston structure 100 is threadedly connected to the piston assembly 10, the plurality of first wedge-shaped protrusions 410 couple with the plurality of second wedge-shaped protrusions 420. When the piston structure 100 is subjected to significant vibration, the first fastener 20 tends to rotate in the unthreading direction. Due to the coupling between the plurality of first wedge-shaped protrusions 410 and the plurality of second wedge-shaped protrusions 420, the second wedge-shaped protrusions 420 of the piston assembly 10 can restrict the rotation of the first fastener 20, thereby significantly increasing the loosening torque of the threaded structure and reducing the attenuation of the loosening torque during vibration, thereby ensuring the secure connection of the piston structure 100.

[0087] It is understandable that the piston structure 100 of the embodiment of the present application can be applied to any field requiring threaded connection, which will not be listed here one by one. Next, the piston structure 100 is applied to a reversing valve (eg, a four-way valve) as an example for description.

[0088] As shown in Figures 8 to 11, in one embodiment, the first fastener 20 includes a head 21 and a screw 22 connected thereto. A plurality of first wedge-shaped protrusions 410 are provided on the surface of the head 21 on the side connected to the screw 22. The plurality of first wedge-shaped protrusions 410 surround the outer circumference of the screw 22. The outer circumference of the screw 22 is provided with an external thread structure. The plurality of first wedge-shaped protrusions 410 are provided on the surface of the head 21 on the side connected to the screw 22. The plurality of first wedge-shaped protrusions 410 surround the outer circumference of the screw 22.

[0089] The piston assembly 10 includes a first gasket 400a and a component to be connected 103. The first gasket 400a includes a first base plate 410a and a plurality of second wedge-shaped protrusions 420. The first base plate 410a has a first through hole 411a, which extends through the first base plate 410a along its thickness and forms a portion of the through hole 101. The plurality of second wedge-shaped protrusions 420 are provided on the surface of the first base plate 410a facing the head 21 and surround the periphery of the first through hole 411a. The second wedge-shaped protrusions 420 are used to stop the first wedge-shaped protrusions 410 in the unscrewing direction, thereby preventing the first fastener 20 from loosening. The screw 22 passes through the first through hole 411a and the component to be connected 103, threading the piston assembly 10 to the guide frame 200.

[0090] It should be noted that, in this embodiment, the first wedge-shaped protrusion 410 is formed on the head 21 and forms an integral structure with the head 21 .

[0091] Furthermore, the part to be connected 103 includes a piston body 11 and an outer baffle 12, the piston body 11 is provided with a first through hole 112 corresponding to the position of the first through hole 411a, and the outer baffle 12 is provided with a second through hole 122 corresponding to the position of the first through hole 411a; the screw 22 passes through the first through hole 411a, the first through hole 112 and the second through hole 122 and is threadedly connected to the guide frame 200.

[0092] It can be understood that the first through-hole 112 passes through the piston body 11 , and the second through-hole 122 passes through the outer baffle 12 .

[0093] It should be noted that the piston body 11 is disposed on a side of the outer baffle 12 away from the first fastener 20 , and is located between the outer baffle 12 and the guide frame 200 .

[0094] In this embodiment, when assembling the first fastener 20, first gasket 400a, outer baffle 12, piston body 11, and guide frame 200, the screw 22 of the first fastener 20 is first passed through the first through-hole 411a, the second through-hole 122, and the first through-hole 112 in sequence, and then extended into the threaded hole 210 of the guide frame 200 for threaded connection. After the first fastener 20 secures the first gasket 400a, outer baffle 12, piston body 11, and guide frame 200, the plurality of first wedge-shaped protrusions 410 couple with the plurality of second wedge-shaped protrusions 420. When subjected to large vibration, the first fastener 20 has a tendency to rotate in the loosening direction. Since the second wedge-shaped protrusion 420 can stop the first wedge-shaped protrusion 410, the first fastener 20 can only rotate in the tightening direction and cannot rotate in the loosening direction. Therefore, the second wedge-shaped protrusion 420 on the first gasket 400a forms a stop for the first fastener 20, limiting the rotation of the first fastener 20 in the loosening direction, thereby significantly increasing the loosening torque of the first fastener 20 and the guide frame 200, and reducing the attenuation of the loosening torque during vibration, thereby ensuring the firmness of the connection between the first fastener 20 and the guide frame 200.

[0095] It can be understood that the loosening direction is also the screwing-out direction, and the tightening direction is also the screwing-in direction.

[0096] Furthermore, the number of first wedge-shaped protrusions 410 on the first fastener 20 and the number of second wedge-shaped protrusions 420 on the first gasket 400a can be the same or different. When the number of first wedge-shaped protrusions 410 on the first fastener 20 is the same as the number of second wedge-shaped protrusions 420 on the first gasket 400a, the multiple first wedge-shaped protrusions 410 are coupled to the multiple second wedge-shaped protrusions 420 in a one-to-one correspondence, and the number of corresponding first wedge-shaped protrusions 410 and second wedge-shaped protrusions 420 increases, further increasing the loosening torque and significantly reducing the attenuation of the loosening torque during vibration.

[0097] As shown in Figures 10 and 11, the first wedge-shaped protrusion 410 has a first helical surface 4103, and the second wedge-shaped protrusion 420 has a second helical surface 423. The first helical surface 4103 and the second helical surface 423 are aligned with each other. Furthermore, the first helical surface 4103 and the second helical surface 423 have the same rotation direction as the helical line of the thread structure. When tightening the first fastener 20, because the first helical surface 4103 and the second helical surface 423 have the same rotation direction as the helical line of the thread structure, as the first fastener 20 is gradually tightened, the first helical surface 4103 and the second helical surface 423 can also be well aligned, avoiding the formation of a gap between the first helical surface 4103 and the second helical surface 423.

[0098] 10 and 11 , the first wedge-shaped protrusion 410 and the second wedge-shaped protrusion 420 both extend along the circumference of the thread structure. In other words, the first wedge-shaped protrusion 410 and the second wedge-shaped protrusion 420 form an arc segment.

[0099] Each first wedge-shaped protrusion 410 has a first tip 4101 and a first thick end 4102; along the circumference of the thread structure, the adjacent first tips 4101 and first thick ends 4102 of two adjacent first wedge-shaped protrusions 410 are connected, so that multiple first wedge-shaped protrusions 410 are connected end to end to form an annular structure.

[0100] Each second wedge-shaped protrusion 420 has a second tip 421 and a second thick end 422; along the circumference of the thread structure, the adjacent second tips 421 and second thick ends 422 of two adjacent second wedge-shaped protrusions 420 are connected, so that multiple second wedge-shaped protrusions 420 are connected end to end to form an annular structure.

[0101] As shown in FIG12 , in one embodiment, the piston structure 100 further includes a first elastic member 510 , which is disposed between the first substrate 410 a and the member to be connected 103 , and is configured to provide an elastic force to the first gasket 400 a away from the member to be connected 103 .

[0102] It can be understood that the elastic force provided by the first elastic member 510 can make the first gasket 400a close to the head 21 of the first fastener 20, thereby making the multiple first wedge-shaped protrusions 410 on the head 21 and the multiple second wedge-shaped protrusions 420 on the first gasket 400a remain coupled to form a stop, further increasing the loosening torque, and avoiding the first wedge-shaped protrusion 410 from detaching from the second wedge-shaped protrusion 420 and losing its anti-loosening effect due to the lack of tight fit between the head 21 and the first gasket 400a.

[0103] In the embodiment of the present application, the first elastic member 510 is disposed between the first substrate 410a and the to-be-connected member 103. In one embodiment, the first elastic member 510 is a spring or an elastic washer, but is not limited thereto.

[0104] When the first elastic member 510 is a spring or an elastic washer, the first elastic member 510 can be sleeved on the outer circumference of the screw rod 22 .

[0105] As shown in Figures 13 to 16, the present application also provides another embodiment, which is different from the previous embodiment in that: the head 21 of the first fastener 20 includes a cap body 211 and a second gasket 400b, one end of the screw 22 passes through the second gasket 400b and is connected to the cap body 211, and the piston assembly 10 includes a third gasket 400c and a part to be connected 103; it can be understood that the cap body 211 is arranged on the side of the second gasket 400b facing away from the third gasket 400c.

[0106] The second gasket 400b includes a second substrate 410b and a plurality of first wedge-shaped protrusions 410. The third gasket 400c includes a third substrate 410c and a plurality of second wedge-shaped protrusions 420. The second substrate 410b has a second via hole 411b that penetrates the second substrate 410b along the thickness direction of the second substrate 410b and forms a portion of the through hole 101. The third substrate 410c has a third via hole 411c that penetrates the third substrate 410c along the thickness direction of the third substrate 410c. The second via hole 411b and the third via hole 411c are located at the same position. The second substrate 410b and the third substrate 410c are stacked on each other, and the surfaces of the second substrate 410b and the third substrate 410c facing each other are respectively provided with a plurality of first wedge-shaped protrusions 410 and a plurality of second wedge-shaped protrusions 420, the plurality of first wedge-shaped protrusions 410 surround the periphery of the second through hole 411b, and the plurality of second wedge-shaped protrusions 420 surround the periphery of the third through hole 411c; the screw 22 of the first fastener 20 passes through the second through hole 411b and the third through hole 411c and the part to be connected 103, and threads the piston assembly 10 to the guide frame 200.

[0107] Furthermore, the part to be connected 103 includes a piston body 11 and an outer baffle 12. The piston body 11 is provided with a first through-hole 112 corresponding to the positions of the second through-hole 411b and the third through-hole 411c, and the outer baffle is provided with a second through-hole 122 corresponding to the positions of the second through-hole 411b and the third through-hole 411c; the screw 22 passes through the second through-hole 411b, the third through-hole 411c, the first through-hole 112 and the second through-hole 122 and is threadedly connected to the guide frame 200.

[0108] It is understood that one or more pairs of gaskets may be provided between the cap body 211 and the member to be connected 103, each pair of gaskets including a second gasket 400b and a third gasket 400c.

[0109] After the first fastener 20 is tightened into place, the multiple first wedge-shaped protrusions 410 of the second gasket 400b are coupled with the multiple second wedge-shaped protrusions 420 of the third gasket 400c. When a large vibration occurs, the first fastener 20 begins to loosen, and the second gasket 400b and the third gasket 400c also gradually loosen, causing the coupled first wedge-shaped protrusions 410 and the second wedge-shaped protrusions 420 to begin to separate. This in turn causes the axial distance between the second gasket 400b and the third gasket 400c along the first fastener 20 to increase. As a result, the second gasket 400b abuts the cap 211 of the head 21 of the first fastener 20, and the third gasket 400c abuts the member to be connected 103, so that the first fastener 20 remains tightened, thereby increasing the loosening torque and reducing the attenuation of the loosening torque during vibration.

[0110] As shown in FIG. 16 , in one embodiment, the piston structure 100 further includes a second elastic member 520 , which is disposed between the cap body 211 and the second substrate 410 b and is configured to provide an elastic force to the first fastener 20 away from the member to be connected 103 .

[0111] It can be understood that the second elastic member 520 is pressed between the cap body 211 and the second gasket 400b. On the one hand, the elastic force provided by the second elastic member 520 can make the second gasket 400b close to the third gasket 400c, thereby making the multiple first wedge-shaped protrusions 410 on the second gasket 400b and the multiple second wedge-shaped protrusions 420 on the third gasket 400c remain coupled to form a stop, further increasing the loosening torque; on the other hand, the elastic force provided by the second elastic member 520 can keep the first fastener 20 in a tightened state, thereby increasing the loosening torque of the first fastener 20 and preventing the first fastener 20 from loosening.

[0112] In one embodiment, the second elastic member 520 can be a spring or an elastic washer, but is not limited thereto. When the second elastic member 520 is a spring or an elastic washer, the second elastic member 520 can be sleeved on the outer periphery of the screw rod 22 .

[0113] 16 , the piston structure 100 further includes a third elastic member 530 , which is disposed between the third substrate 410 c and the component to be connected 103 , and is configured to provide an elastic force to move the third gasket 400 c away from the component to be connected 103 .

[0114] In the embodiment of the present application, the third elastic member 530 is disposed between the third substrate 410 c and the component to be connected 103 .

[0115] It can be understood that the third elastic member 530 is pressed between the third gasket 400c and the part to be connected 103. On the one hand, the elastic force provided by the third elastic member 530 can make the third gasket 400c close to the second gasket 400b, thereby making the multiple first wedge-shaped protrusions 410 on the second gasket 400b and the multiple second wedge-shaped protrusions 420 on the third gasket 400c remain coupled to form a stop, further increasing the loosening torque; on the other hand, the elastic force provided by the third elastic member 530 can keep the part to be connected 103 in a tightened state, thereby increasing the loosening torque of the first fastener 20 and preventing the first fastener 20 from loosening.

[0116] In one embodiment, the third elastic member 530 may be a spring or an elastic washer, but the present invention is not limited thereto. When the third elastic member 530 is a spring or an elastic washer, the third elastic member 530 may be sleeved on the outer periphery of the screw rod 22 .

[0117] It is understandable that the second elastic member 520 and the third elastic member 530 may exist at the same time or one of them may exist selectively.

[0118] In one embodiment, the number of first wedge-shaped protrusions 410 on the second gasket 400b and the number of second wedge-shaped protrusions 420 on the third gasket 400c may be the same or different. When the number of first wedge-shaped protrusions 410 on the second gasket 400b is the same as the number of second wedge-shaped protrusions 420 on the third gasket 400c, the plurality of first wedge-shaped protrusions 410 and the plurality of second wedge-shaped protrusions 420 are coupled in a one-to-one correspondence, and the number of corresponding first wedge-shaped protrusions 410 and second wedge-shaped protrusions 420 increases, further increasing the loosening torque and significantly reducing the attenuation of the loosening torque during vibration.

[0119] In other words, the piston structure 100 in some of the above-described embodiments has at least the following advantages and beneficial effects: After the first fastener 20 is threadedly connected to the piston assembly 10, the multiple first wedge-shaped protrusions 410 are coupled to the multiple second wedge-shaped protrusions 420. When the piston structure is subjected to significant vibration, the threaded structure tends to rotate toward loosening. Because the multiple first wedge-shaped protrusions 410 are coupled to the multiple second wedge-shaped protrusions 420, and the second wedge-shaped protrusions 420 can stop the first wedge-shaped protrusions 410 when the threaded structure is loosened, the second wedge-shaped protrusions 420 of the piston assembly 10 can restrict the rotation of the first fastener 20, thereby significantly increasing the loosening torque of the threaded structure and reducing the attenuation of the loosening torque during vibration, thereby ensuring the secure connection of the piston structure.

[0120] Furthermore, it is understood that the anti-rotation protrusion 23 / mating protrusion 24 in all of the above-described embodiments may be implemented as a wedge shape, as defined by the specific structure of the first wedge-shaped protrusion or the second wedge-shaped protrusion. However, it is understood that in other embodiments, the shape of the anti-rotation protrusion 23 is not limited to a wedge shape, as long as the anti-rotation protrusion 23 and the anti-rotation groove 102 / mating protrusion 24 structures can match each other when the first fastener 20 locks the piston assembly 10 to the guide frame 200, thereby achieving a snap-fitting effect to prevent the first fastener 20 from loosening.

[0121] As shown in FIG17 , illustratively, in one embodiment, the present application provides a four-way valve, which includes a piston structure 100 according to any of the above embodiments. Since the four-way valve includes the piston structure according to any of the above embodiments, it has all the advantages and benefits of any of the above embodiments, which will not be described in detail here.

[0122] The present application also provides a slider assembly, which includes a slider, a guide frame 200 and the piston structure 100 described in any one of the above embodiments. The guide frame 200 is sleeved on the circumference of the slider and connected to the slider, and the piston structure 100 is connected to the opposite ends of the guide frame 200.

[0123] The present application also provides a reversing valve, which includes a valve body and the above-mentioned slider assembly, wherein the valve body has a valve cavity, and the slider assembly is movably disposed in the valve cavity. It can be further understood that a four-way valve is a type of reversing valve, and reversing valves include but are not limited to four-way valves.

[0124] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A piston structure, characterized in that: The first fastener comprises a piston assembly and a first fastener, wherein the piston assembly is provided with a through hole, and the first fastener comprises a head and a screw, wherein the screw is connected to one end of the head and passes through the through hole, and is used to connect the piston assembly to the guide frame; The first fastener further includes a rotation-stopping protrusion, which protrudes from and is connected to the end surface of the head close to the screw; wherein, The piston assembly is further provided with a rotation-stop groove. When the first fastener locks the piston assembly to the guide frame, the rotation-stop protrusion can be locked in the rotation-stop groove to prevent the first fastener from rotating in the screw-out direction of the screw rod; or The piston assembly is further provided with a matching protrusion. When the first fastener locks the piston assembly to the guide frame, the anti-rotation protrusion can be coupled with the matching protrusion to prevent the first fastener from rotating along the screw-out direction of the screw.

2. The piston structure according to claim 1, wherein: The anti-rotation protrusion extends along the circumference of the first fastener, and two ends of the anti-rotation protrusion along the circumference of the first fastener are defined as a first end and a second end respectively; Along the screwing direction of the screw rod and in the direction from the first end to the second end, the vertical distance between the surface of the anti-rotation protrusion away from the head and the head gradually decreases.

3. The piston structure according to claim 2, wherein: Along the radial direction of the first fastener, the anti-rotation protrusion has an inner side and an outer side, the inner side is connected to the screw rod, and / or the outer side is arranged flush with the side surface of the head.

4. The piston structure according to claim 2, wherein: There are multiple anti-rotation protrusions, and the multiple anti-rotation protrusions are distributed along the circumference of the first fastener; Wherein, the first end portion of each of the anti-rotation protrusions is correspondingly clamped in one of the anti-rotation grooves.

5. The piston structure according to claim 4, wherein: Along the circumference of the first fastener, the second end portion of one of the anti-rotation protrusions is connected to the first end portion of the other anti-rotation protrusion.

6. The piston structure according to claim 1, wherein: There are multiple through holes, and the multiple through holes are arranged on the piston assembly at intervals; The number of the first fasteners is arranged in a one-to-one correspondence with the number of the through holes.

7. The piston structure according to claim 1, wherein: The piston assembly includes a piston body and an outer baffle, wherein the outer baffle is provided on a side of the piston body away from the guide frame; The outer baffle is provided with a connecting hole, the piston body is provided with a matching hole, and the piston structure further includes a second fastener, which passes through the connecting hole and the matching hole to connect the outer baffle and the piston body; Wherein, the through hole passes through the outer baffle and the piston body.

8. The piston structure according to claim 7, wherein: There are multiple connecting holes, and the multiple connecting holes are spaced apart along the circumference of the piston assembly; Wherein, the number of the matching holes and the second fasteners are arranged in one-to-one correspondence with the number of the connecting holes.

9. The piston structure according to claim 1, wherein: The head, the screw and the anti-rotation protrusion are an integrally formed structure; Alternatively, the anti-rotation protrusion is a cutting piece.

10. The piston structure according to claim 1, wherein: The anti-rotation protrusion is configured as a first wedge-shaped protrusion, and the matching protrusion is configured as a second wedge-shaped protrusion; A plurality of the first wedge-shaped protrusions and a plurality of the second wedge-shaped protrusions are provided; the plurality of the first wedge-shaped protrusions and the plurality of the second wedge-shaped protrusions are arranged along the circumference of the thread structure, and the corresponding first wedge-shaped protrusions are coupled with the second wedge-shaped protrusions.

11. The piston structure according to claim 10, wherein: The first wedge-shaped protrusion has a first helical surface, the second wedge-shaped protrusion has a second helical surface, and the first helical surface is in contact with the second helical surface.

12. The piston structure according to claim 11, wherein: The first helical surface, the second helical surface and the helical line of the thread structure have the same rotation direction.

13. The piston structure according to claim 10, wherein: The number of the first wedge-shaped protrusions is the same as the number of the second wedge-shaped protrusions, and the plurality of first wedge-shaped protrusions are coupled with the plurality of second wedge-shaped protrusions in a one-to-one correspondence.

14. The piston structure according to claim 13, wherein: Each of the first wedge-shaped protrusions has a first tip and a first thick end; along the circumference of the thread structure, the first tips and the first thick ends of two adjacent first wedge-shaped protrusions are connected; Each of the second wedge-shaped protrusions has a second pointed end and a second thick end; Along the circumference of the thread structure, adjacent second tips and second thick ends of two adjacent second wedge-shaped protrusions are connected.

15. The piston structure according to claim 10, wherein: The first wedge-shaped protrusion and the second wedge-shaped protrusion extend along the circumference of the thread structure.

16. The piston structure according to claim 10, wherein: A plurality of first wedge-shaped protrusions are protruding from a surface of the head connected to the screw, and the plurality of first wedge-shaped protrusions surround the outer circumference of the screw; The piston assembly includes a first gasket and a to-be-connected member, wherein the first gasket includes a first base plate and a plurality of second wedge-shaped protrusions, wherein the first base plate has a first through hole that passes through the first base plate, and the plurality of second wedge-shaped protrusions are protruding from a surface of the first base plate facing the head portion and surrounding a periphery of the first through hole; The second wedge-shaped protrusion is used to stop the first wedge-shaped protrusion in the screwing-out direction; the screw rod passes through the first through hole and the part to be connected, and threads the piston assembly to the guide frame.

17. The piston structure according to claim 16, wherein: The invention further comprises a first elastic member, which is arranged between the first substrate and the member to be connected and is used to provide an elastic force to the first gasket away from the member to be connected.

18. The piston structure according to claim 16, wherein: The to-be-connected member comprises a piston body and an outer baffle, wherein the piston body is provided with a first through-hole corresponding to the position of the first through-hole, and the outer baffle is provided with a first through-hole corresponding to the position of the first through-hole; The screw rod passes through the first through hole, the first through hole and the first through hole and is threadedly connected to the guide frame.

19. The piston structure according to claim 10, wherein: The head includes a cap body and a second gasket, one end of the screw rod passes through the second gasket and is connected to the cap body, and the piston assembly includes a third gasket and a to-be-connected member; the second gasket includes a second substrate and a plurality of the first wedge-shaped protrusions, and the third gasket includes a third substrate and a plurality of the second wedge-shaped protrusions, the second substrate has a second through-hole that passes through the second substrate, the third substrate has a third through-hole that passes through the third substrate, and the second substrate and the third substrate are respectively provided with a plurality of the first wedge-shaped protrusions and a plurality of the second wedge-shaped protrusions on surfaces facing each other, the plurality of the first wedge-shaped protrusions surround the periphery of the second through-hole, and the plurality of the second wedge-shaped protrusions surround the periphery of the third through-hole; The screw passes through the second through hole, the third through hole and the part to be connected, and threads the piston assembly on the guide frame.

20. The piston structure according to claim 19, wherein: The invention further comprises a third elastic member, which is arranged between the third substrate and the member to be connected and is used to provide an elastic force to the third gasket away from the member to be connected.

21. The piston structure according to claim 19, wherein: The cap body is located on a side of the second gasket facing away from the third gasket; The piston structure further includes a second elastic member, which is disposed between the cap body and the second substrate and is used to provide an elastic force to the cap body and the screw rod away from the member to be connected.

22. The piston structure according to claim 19, wherein: The to-be-connected member comprises a piston body and an outer baffle, the piston body is provided with a first through-hole corresponding to the position of the second through-hole and the third through-hole, and the outer baffle is provided with a second through-hole corresponding to the position of the second through-hole and the third through-hole; The screw rod passes through the second through hole, the third through hole, the first through hole and the second through hole and is threadedly connected to the guide frame.

23. A slider assembly, characterized in that: It comprises a slider, a guide frame and the piston structure as claimed in claim 1, wherein the guide frame is sleeved on the peripheral side of the slider and connected to the slider, and the piston structure is connected to the opposite ends of the guide frame.

24. A reversing valve, characterized in that: The invention comprises a valve body and a slider assembly as claimed in claim 23, wherein the valve body has a valve cavity, and the slider assembly is movably disposed in the valve cavity.

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