A valve core assembly and a cylinder type height adjusting valve

Abstract

The utility model provides a valve core assembly and cylinder type height regulating valve relate to height regulating valve technical field to solve the technical problem of the valve core sliding process of height regulating valve in prior art is easy to cause the abrasion or damage of sealing ring and influences the sealing performance, a valve core assembly, the valve seat is made of metal material, is equipped with the first through -hole of machining formation on the valve seat, the first through -hole includes the first reduced diameter portion, the first reduced diameter portion located in the expansion diameter portion both sides, the second reduced diameter portion, the valve seat side wall is equipped with the second through -hole of intercommunication expansion diameter portion, the valve core body is connected in the first through -hole sliding, the valve core body includes first guide department, first sealing portion, second sealing portion and second guide department along the axial direction in proper order, is equipped with first recess and second recess respectively on first guide department and second guide department, first sealing portion and second sealing portion respectively have first sealing ring and second sealing ring, first sealing ring and second sealing ring are sealed with first reduced diameter portion and second reduced diameter portion sliding respectively.

Description

Technical Field

[0001] This utility model relates to the field of height adjustment valve technology, specifically to a valve core assembly and a cylindrical height adjustment valve. Background Technology

[0002] Car seat adjustment requires the use of a height adjustment valve. When it is necessary to lower the seat height, the air in the seat airbag is released through the height adjustment valve. When it is necessary to raise the seat height, the air in the seat airbag is introduced through the height adjustment valve.

[0003] A height adjustment valve generally includes a housing, a valve core, and a guide rod. Both the housing and the valve core are made of plastic. The valve core is slidably connected within the housing. The guide rod connects to the valve core and is also slidably connected to the housing. The guide rod is connected to the seat's operating lever, which controls the left-right sliding of the guide rod within the housing, thereby causing the valve core to slide left and right. The housing contains, from left to right, interconnected first cavities, mounting cavities, and second cavities. An air nozzle is mounted on the housing and communicates with the mounting cavity; the air nozzle is used to connect to the seat airbag. In addition, the housing is equipped with an air outlet and an air inlet. The air outlet connects to the outside atmosphere and is connected to the first cavity, while the air inlet connects to an external air source and is connected to the second cavity. Grooves are provided on the left and right sides of the outer peripheral wall of the valve core as air passages. Two sealing rings are embedded in the housing. When the valve core is sealed with both sealing rings, the air passage is disconnected. When the valve core moves to the right, the valve core disengages from the sealing ring on the left, and the groove on the left connects the air nozzle to the first cavity, allowing the gas in the seat airbag to be discharged through the groove on the left and the first cavity. When the valve core moves to the left, the valve core disengages from the sealing ring on the right, and the groove on the right connects the air nozzle to the second cavity, allowing the external air source to inflate the seat airbag through the second cavity and the groove on the right.

[0004] The problem with the height regulating valve described above is that the two sealing rings remain stationary during the movement of the valve core. Due to the presence of grooves on both sides of the valve core, stress concentration occurs on the sealing rings when the grooves come into contact with them during the sliding process, which can easily lead to wear or damage to the sealing rings. In addition, since the valve core is made of plastic, the parting line on the valve core can also easily cause wear or damage to the sealing rings, thereby affecting the sealing performance. Utility Model Content

[0005] To address the shortcomings of existing technologies, the first objective of this utility model is to provide a valve core assembly that solves the technical problem in existing height regulating valves where the valve core sliding process easily causes wear or damage to the sealing ring, thus affecting the sealing performance.

[0006] To solve the above technical problems, this utility model provides a valve core assembly, comprising:

[0007] A valve seat made of metal material has a first through hole formed by machining along the axial direction. The first through hole includes an enlarged diameter section, a first reduced diameter section and a second reduced diameter section located on both sides of the enlarged diameter section. The inner diameters of the first reduced diameter section and the second reduced diameter section are both smaller than the enlarged diameter section. The valve seat sidewall has a second through hole that connects to the enlarged diameter section.

[0008] The valve core body is slidably connected in the first through hole. The valve core body includes, in sequence along the axial direction, a first conducting part, a first sealing part, a second sealing part, and a second conducting part. The first conducting part and the second conducting part are respectively provided with a first groove and a second groove. The first groove and the second groove both extend inward from the end of the valve core body. The first sealing part and the second sealing part are respectively fitted with a first sealing ring and a second sealing ring. The first ring and the second sealing ring are respectively slidably sealed with the first diameter reduction part and the second diameter reduction part.

[0009] The first sealing part is slid towards the enlarged diameter part to make the first groove communicate with the enlarged diameter part, and the second sealing part is slid towards the enlarged diameter part to make the second groove communicate with the enlarged diameter part.

[0010] With the above structure, the valve core assembly of this utility model has the following advantages: Based on the prior art, a valve seat is added, and the valve core body slides within the valve seat. Exhaust and inflation are achieved through the communication between the first groove and the expanded diameter portion, and the second groove and the expanded diameter portion. Furthermore, both the first and second sealing rings are embedded within the first and second sealing portions of the valve core body. Therefore, during the sliding process of the valve core body, both the first and second sealing rings move with the valve core body, and there is no relative displacement between the first and second sealing rings and the valve core body. This prevents wear and damage to the first and second sealing rings caused by the parting line of the valve core body and the first and second grooves. The valve seat is made of metal, and the first through hole is machined, so the surface of the first through hole has no parting line and can be relatively flat. During the sliding process of the first and second sealing rings, the contact force between the first and second sealing rings and the first and second reduced diameter portions, and even the expanded diameter portion, is more uniform, reducing stress concentration and thus preventing wear and damage to the first and second sealing rings, ensuring sealing effectiveness.

[0011] As an improvement, the valve core body has an annular groove in the middle and the annular groove is located between the first sealing part and the second sealing part; with this structure, the annular groove can increase the airflow space in the expansion part, so that the first groove and the expansion part and the second groove and the expansion part can be smoothly connected.

[0012] As an improvement, an annular guide portion is provided along the circumferential direction on the annular groove. The outer diameter of the guide portion, the outer diameter of the first sealing portion, and the outer diameter of the second sealing portion are all the same. With this structure, if the displacement of the valve core body is too large during the movement of the valve core body, the first sealing portion and the second sealing portion may detach from the first reduced diameter portion and the second reduced diameter portion. At this time, the guide portion slides in the first reduced diameter portion and the second reduced diameter portion to guide the valve core body as a whole, so that the valve core body can be smoothly reset.

[0013] As an improvement, both the first and second conductive parts are provided with several annular oil reservoirs; this structure makes the sliding between the valve core body and the valve seat smoother.

[0014] As an improvement, the expansion section is connected to the first reduction section and the second reduction section by a slope; with this structure, the slope can act as a guide to help the first sealing ring and the second sealing ring return to the first reduction section and the second reduction section.

[0015] As an improvement, rounded corners are provided between the first / second reduced diameter section and the inclined surface and valve seat end; this structure reduces wear and damage to the first and second sealing rings.

[0016] As an improvement, the depth of both the first and second grooves is 0.2-0.5mm. With this structure, the first and second grooves have a certain depth to prevent the lubricating oil between the valve seat and the valve core body from blocking the first and second grooves.

[0017] The second objective of this utility model is to provide a cylindrical height regulating valve, including the valve core assembly described above.

[0018] With the above structure, the cylindrical height regulating valve of this utility model has the following advantages: Based on the existing technology, a valve seat is added, and the valve core body slides within the valve seat. Exhaust and inflation are achieved through the communication between the first groove and the expanded diameter section, and the second groove and the expanded diameter section. Furthermore, both the first and second sealing rings are embedded within the first and second sealing sections of the valve core body. Therefore, during the sliding process of the valve core body, both the first and second sealing rings move with the valve core body, and there is no relative displacement between the first and second sealing rings and the valve core body. This prevents wear and damage to the first and second sealing rings caused by the parting line of the valve core body and the first and second grooves. The valve seat is made of metal, and the first through hole is machined, so the surface of the first through hole has no parting line and can be relatively flat. During the sliding process of the first and second sealing rings, the contact force between the first and second sealing rings and the first and second reduced diameter sections, and even the expanded diameter section, is more uniform, reducing stress concentration and thus preventing wear and damage to the first and second sealing rings, ensuring sealing effectiveness.

[0019] As an improvement, this utility model also includes a housing and a guide rod. The housing has a first cavity, a mounting cavity, and a second cavity that are interconnected along the axial direction. The housing has a first air hole communicating with the first cavity, an air passage communicating with the mounting cavity, and a second air hole communicating with the second cavity. The valve seat is connected to the mounting cavity. The first groove communicates with the first cavity, and the second groove communicates with the second cavity. The guide rod is connected to the valve core body and is slidably connected to the housing. With this structure, the guide rod is connected to an operating rod to drive the valve core body to move. The first air hole and the second air hole are used for venting and inflating, respectively. The air passage is used to connect to the seat airbag.

[0020] As an improvement, a muffler is connected to the outer wall of the casing, and the position of the muffler corresponds to the first air hole; this structure reduces the noise during exhaust. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of Embodiment 1 of the present utility model.

[0022] Figure 2 This is a cross-sectional view of the exhaust state in Embodiment 1 of this utility model.

[0023] Figure 3 This is a cross-sectional view of the inflated state in Embodiment 1 of this utility model.

[0024] Figure 4 This is an exploded structural diagram of Embodiment 1 of the present invention.

[0025] Figure 5 This is a cross-sectional view of Embodiment 2 of the present invention.

[0026] Figure 6 This is an exploded structural diagram of Embodiment 2 of the present invention.

[0027] Reference numerals: 1. Valve seat; 2. Expanding section; 3. First reducing section; 4. Second reducing section; 5. Second through hole; 6. Valve core body; 61. First conducting section; 62. First sealing section; 63. Second sealing section; 64. Second conducting section; 7. First groove; 8. Second groove; 9. First sealing ring; 10. Second sealing ring; 11. Annular groove; 12. Guide section; 13. Oil reservoir; 14. Inclined surface; 15. Rounded corner; 16. Guide rod; 17. First cavity; 18. Mounting cavity; 19. Second cavity; 20. First vent; 21. Air passage; 22. Second vent; 23. Silencer; 24. First housing; 25. Second housing; 26. Third sealing ring; 27. Fourth sealing ring; 28. Fifth sealing ring; 29. ​​Plug; 30. Pressure head; 31. Lip sealing ring; 32. Guide ring; 33. Guide housing. Detailed Implementation

[0028] The following is a detailed description of a valve core assembly and a cylindrical height regulating valve according to the present invention, with reference to the accompanying drawings.

[0029] Example 1:

[0030] like Figures 1 to 4 As shown, this embodiment relates to a valve core assembly, including a valve seat 1 and a valve core body 6. The valve seat 1 is made of metal material, and the valve core body 6 is made of the same material as in the prior art, namely plastic. The valve seat 1 has a first through hole formed by machining along the axial direction. The first through hole includes an enlarged diameter portion 2, a first reduced diameter portion 3 and a second reduced diameter portion 4 located on both sides of the enlarged diameter portion 2. The inner diameters of the first reduced diameter portion 3 and the second reduced diameter portion 4 are both smaller than the enlarged diameter portion 2, and the inner diameters of the first reduced diameter portion 3 and the second reduced diameter portion 4 are the same. The side wall of the valve seat 1 has a second through hole 5 that communicates with the enlarged diameter portion 2. The second through holes 5 are a plurality of ones that are equidistantly arranged along the circumference of the side wall of the valve seat 1. The second through holes 5 are all arranged on the side wall of the valve seat 1 corresponding to the enlarged diameter portion 2.

[0031] like Figure 1 As shown, the expanded diameter section 2 is transitioned to the first reduced diameter section 3 and the second reduced diameter section 4 via an inclined surface 14. Specifically, the inclined surface 14 is a conical surface provided between the expanded diameter section 2 and the first reduced diameter section 3 and the second reduced diameter section 4. A fillet 15 is provided between the first reduced diameter section 3 / second reduced diameter section 4 and the inclined surface 14 and the end of the valve seat 1. Similarly, a fillet 15 is provided between the first reduced diameter section 3 and the inclined surface 14 and the end of the valve seat 1. The entire first through hole, including the expanded diameter section 2, the first reduced diameter section 3, the second reduced diameter section 4, the inclined surface 14, and the fillet 15, is formed by machining. Therefore, the surface of the first through hole is smooth, avoiding large step differences.

[0032] like Figure 1 As shown, the valve core body 6 is slidably connected in the first through hole. The valve core body 6 includes, along the axial direction, a first conducting part 61, a first sealing part 62, a second sealing part 63, and a second conducting part 64. The valve core body 6 has an annular groove 11 in the middle, and the annular groove 11 is located between the first sealing part 62 and the second sealing part 63. That is, the annular groove 11 divides the valve core body 6 into left and right halves. The left half is provided with the first conducting part 61 and the first sealing part 62, and the right half is provided with the second sealing part 63 and the second conducting part 64. The left end of the first conducting part 61 is the left end of the valve core body 6, and the right end of the second conducting part 64 is the right end of the valve core body 6.

[0033] like Figure 1As shown, the first conducting part 61 and the second conducting part 64 are respectively provided with a first groove 7 and a second groove 8. The first groove 7 and the second groove 8 both extend inward from the end of the valve core body 6 and extend to the first sealing part 62 and the second sealing part 63 respectively. The first sealing part 62 and the second sealing part 63 are respectively fitted with a first sealing ring 9 and a second sealing ring 10. The first sealing ring 9 and the second sealing ring 10 are respectively in sliding sealing cooperation with the first diameter reduction part 3 and the second diameter reduction part 4.

[0034] like Figure 1 As shown, an annular guide portion 12 is provided on the annular groove 11 along the circumferential direction. The outer diameter of the guide portion 12, the outer diameter of the first sealing portion 62, and the outer diameter of the second sealing portion 63 are all the same. The guide portion 12 can also slide within the first reduced diameter portion 3 and the second reduced diameter portion 4.

[0035] like Figure 1 and Figure 4 As shown, both the first conductive part 61 and the second conductive part 64 are provided with a plurality of annular oil storage grooves 13. The plurality of oil storage grooves 13 on the first conductive part 61 are spaced apart along the axial direction and all intersect with the first groove 7. The plurality of oil storage grooves 13 on the second conductive part 64 are spaced apart along the axial direction and all intersect with the second groove 8. In order to prevent lubricating oil from blocking the first groove 7 and the second groove 8, both the first groove 7 and the second groove 8 have a certain depth. Preferably, the depth of both the first groove 7 and the second groove 8 is 0.2-0.5mm. In this embodiment, the depth of both the first groove 7 and the second groove 8 is 0.3mm.

[0036] This utility model adds a valve seat 1 to the existing technology, and the valve core body 6 slides in the valve seat 1. By sliding the first sealing part 62 towards the enlarged diameter part 2, the first groove 7 communicates with the enlarged diameter part 2, that is, as shown in the figure. Figure 2 As shown; by sliding the second sealing part 63 towards the enlarged diameter part 2, the second groove 8 communicates with the enlarged diameter part 2, that is, as Figure 3As shown, the first groove 7 communicates with the expanded diameter portion 2, and the second groove 8 communicates with the expanded diameter portion 2 to achieve venting and inflation. Both the first sealing ring 9 and the second sealing ring 10 are embedded within the first sealing portion 62 and the second sealing portion 63 of the valve core body 6. Therefore, during the sliding process of the valve core body 6, both the first sealing ring 9 and the second sealing ring 10 move with the valve core body 6, and there is no relative displacement between the first sealing ring 9, the second sealing ring 10 and the valve core body 6. This prevents wear and damage to the first sealing ring 9 and the second sealing ring 10 caused by the parting line of the valve core body 6 and the first groove 7 and the second groove 8. The valve seat 1 is made of metal, and the first through hole is machined, so the surface of the first through hole has no parting line and can be relatively flat. During the sliding process of the first sealing ring 9 and the second sealing ring 10, the contact force between the first sealing ring 9 and the second sealing ring 10 and the first reduced diameter portion 3, the second reduced diameter portion 4, and even the expanded diameter portion 2 is more uniform, reducing stress concentration and thus preventing wear and damage to the first sealing ring 9 and the second sealing ring 10, ensuring sealing effectiveness.

[0037] Example 2:

[0038] like Figure 5 and Figure 6 As shown, this embodiment relates to a cylindrical height regulating valve, including the valve core assembly in Embodiment 1, and also including a housing and a guide rod 16. The housing has a first cavity 17, a mounting cavity 18 and a second cavity 19 that are interconnected along the axial direction. The housing includes a first housing 24 and a second housing 25. The left end of the first housing 24 is connected to a plug 29, and the left end of the second housing 25 is connected to the right end of the first housing 24. The two are sealed by a fifth sealing ring 28. The first cavity 17 and the mounting cavity 18 are located in the first housing 24, and the second cavity 19 is located in the second housing 25. The housing has a first air hole 20 communicating with the first cavity 17, an air passage 21 communicating with the mounting cavity 18 and a second air hole 22 communicating with the second cavity 19. The first air hole 20 is located on the side wall of the first housing 24 corresponding to the first cavity 17, and the second air hole 22 is located on the side wall of the second housing 25 corresponding to the second cavity 19. An air nozzle is provided on the outer wall of the first housing 24 corresponding to the mounting cavity 18, and the air passage 21 is provided on the air nozzle.

[0039] like Figure 5As shown, valve seat 1 is connected in mounting cavity 18, second through hole 5 is connected to air passage 21 through mounting cavity 18, first groove 7 is connected to first cavity 17, second groove 8 is connected to second cavity 19, valve seat 1 is sealed to first housing 24 and second housing 25 respectively through third sealing ring 26 and fourth sealing ring 27; guide rod 16 is connected to valve core body 6 and slidably connected to housing. Specifically, left end of guide rod 16 is connected to valve core body 6, right end of guide rod 16 is located in guide housing 33, pressure head 30, lip sealing ring 31 and guide ring 32 are connected from left to right in the second housing 25, and middle part of guide rod 16 is slidably connected in pressure head 30, lip sealing ring 31 and guide ring 32.

[0040] like Figure 6 As shown, a muffler 23 is connected to the outer wall of the housing. The position of the muffler 23 corresponds to the first air hole 20. That is, the first air hole 20 serves as the air outlet. The muffler 23 is installed on the outer wall of the first housing 24. The second air hole 22 serves as the air inlet and is connected to an external air source. The air nozzle is connected to the seat airbag. When the guide rod 16 moves to the right, it drives the valve core body 6 to move to the right. The gas inside the seat airbag flows out from the first air hole 20 through the air passage 21, the mounting cavity 18, the second through hole 5, the first groove 7, and the first cavity 17. When the guide rod 16 moves to the left, it drives the valve core body 6 to move to the left. The external air source flows into the seat airbag through the second air hole 22, the second cavity 19, the second groove 8, the second through hole 5, the mounting cavity 18, and the air passage 21.

[0041] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the two embodiments described above. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A valve core assembly, characterized in that, include: A valve seat (1) made of metal material is provided on the valve seat (1) along the axial direction by a first through hole formed by machining. The first through hole includes an enlarged diameter portion (2), a first reduced diameter portion (3) and a second reduced diameter portion (4) located on both sides of the enlarged diameter portion (2). The inner diameters of the first reduced diameter portion (3) and the second reduced diameter portion (4) are both smaller than the enlarged diameter portion (2). The side wall of the valve seat (1) is provided with a second through hole (5) that communicates with the enlarged diameter portion (2). The valve core body (6) is slidably connected in the first through hole. The valve core body (6) includes a first conducting part (61), a first sealing part (62), a second sealing part (63), and a second conducting part (64) in sequence along the axial direction. The first conducting part (61) and the second conducting part (64) are respectively provided with a first groove (7) and a second groove (8). The first groove (7) and the second groove (8) both extend inward from the end of the valve core body (6). The first sealing part (62) and the second sealing part (63) are respectively fitted with a first sealing ring (9) and a second sealing ring (10). The first sealing ring (9) and the second sealing ring (10) are respectively slidably sealed with the first reduced diameter part (3) and the second reduced diameter part (4).

2. The valve core assembly according to claim 1, characterized in that, The valve core body (6) has an annular groove (11) in the middle and the annular groove (11) is located between the first sealing part (62) and the second sealing part (63).

3. The valve core assembly according to claim 2, characterized in that, The annular groove (11) is provided with an annular guide portion (12) along the circumferential direction. The outer diameter of the guide portion (12), the outer diameter of the first sealing portion (62), and the outer diameter of the second sealing portion (63) are all the same.

4. The valve core assembly according to claim 1, characterized in that, Both the first conductive part (61) and the second conductive part (64) are provided with several annular oil storage tanks (13).

5. The valve core assembly according to claim 1, characterized in that, The expansion section (2) is connected to the first reduction section (3) and the second reduction section (4) by a slope (14).

6. The valve core assembly according to claim 5, characterized in that, The first reduced diameter portion (3) / the second reduced diameter portion (4) are provided with rounded corners (15) between the inclined surface (14) and the end of the valve seat (1).

7. The valve core assembly according to claim 1, characterized in that, The depth range of the first groove (7) and the second groove (8) is 0.2-0.5mm.

8. A cylindrical height regulating valve, characterized in that, Includes the valve core assembly as described in any one of claims 1 to 7.

9. The cylindrical height regulating valve according to claim 8, characterized in that, It also includes a housing and a guide rod (16). The housing has a first cavity (17), a mounting cavity (18) and a second cavity (19) connected to each other in sequence along the axial direction. The housing has a first air hole (20) connected to the first cavity (17), an air passage (21) connected to the mounting cavity (18) and a second air hole (22) connected to the second cavity (19). The valve seat (1) is connected to the mounting cavity (18). The first groove (7) is connected to the first cavity (17) and the second groove (8) is connected to the second cavity (19). The guide rod (16) is connected to the valve core body (6) and is slidably connected to the housing.

10. The cylindrical height regulating valve according to claim 9, characterized in that, A silencer (23) is connected to the outer wall of the housing, and the position of the silencer (23) corresponds to the first air hole (20).

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