Valve element assembly and barrel type height adjusting valve

Abstract

The invention provides a valve element assembly and a barrel type height adjusting valve, relates to the technical field of height adjusting valves, and aims to solve the technical problem that in the prior art, in the sliding process of a valve element of a height adjusting valve, a sealing ring is prone to being abraded or damaged, and the sealing performance is affected. According to the valve element assembly, a valve seat is made of metal materials, a first through hole formed through machining is formed in the valve seat, the first through hole comprises a diameter expanding part, a first diameter reducing part and a second diameter reducing part, the first diameter reducing part and the second diameter reducing part are located on the two sides of the diameter expanding part, and a second through hole communicated with the diameter expanding part is formed in the side wall of the valve seat; the valve element body is connected into the first through hole in a sliding mode, the valve element body sequentially comprises a first conduction part, a first sealing part, a second sealing part and a second conduction part in the axial direction, the first conduction part and the second conduction part are provided with a first groove and a second groove respectively, and the first sealing part and the second sealing part are connected with a first sealing ring and a second sealing ring in an embedded mode respectively. And the first sealing ring and the second sealing ring are respectively in sliding sealing fit with the first reducing part and the second reducing part.

Description

Technical Field

[0001] The present invention relates to the technical field of height regulating valves, in particular to a valve core assembly and a cartridge type height regulating valve. Background Art

[0002] Car seat adjustment requires the use of a height adjustment valve. When the seat height needs to be lowered, the gas in the seat airbag is discharged through the height adjustment valve. When the seat height needs to be raised, gas is input into the seat airbag through the height adjustment valve.

[0003] A height adjustment valve typically consists of a housing, a valve core, and a guide rod. Both the housing and the valve core are plastic components. The valve core slides within the housing. The guide rod, which is connected to the valve core and also slides with the housing, is connected to the seat's operating lever. The operating lever controls the guide rod's left and right sliding movement within the housing, thereby driving the left and right movement of the valve core. The housing, from left to right, contains a first cavity, a mounting cavity, and a second cavity, interconnected by a valve. The housing is equipped with a valve that connects to the mounting cavity and is used to connect to the seat's airbag. In addition, an air outlet and an air inlet are provided on the shell, wherein the air outlet is connected to the outside atmosphere and connected to the first cavity, and the air inlet is connected to the external air source and connected to the second cavity. Grooves are respectively provided on the left and right sides of the outer peripheral wall of the valve core as air passages, and two sealing rings are embedded in the shell. When the valve core is sealed with the two sealing rings, the air path is disconnected; when the valve core moves to the right, the valve core is disengaged from the sealing ring on the left, and the groove on the left connects the air nozzle with the first cavity, and the gas in the seat airbag is discharged through the groove on the left and the first cavity; when the valve core moves to the left, the valve core is disengaged from the sealing ring on the right, and the groove on the right connects the air nozzle with the second cavity, and the external air source inflates the seat airbag through the second cavity and the groove on the right.

[0004] The problem with the above-mentioned height adjustment valve is that the two sealing rings are fixed during the movement of the valve core. Due to the presence of grooves on both sides of the valve core, when the grooves contact the sealing rings during the sliding of the valve core, stress concentration occurs on the sealing rings, which can easily lead to wear or damage to the sealing rings. In addition, since the valve core is a plastic structure, the parting line on the valve core can also easily lead to wear or damage to the sealing rings, thereby affecting the sealing performance. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the first object of the present invention is to provide a valve core assembly to solve the technical problem in the prior art that the valve core of the height regulating valve is easily worn or damaged during sliding, thereby affecting the sealing performance.

[0006] In order to solve the above technical problems, the present invention provides a valve core assembly, comprising: A valve seat made of metal material, with a first through hole formed by machining in the axial direction of the valve seat, the first through hole comprising an expanded diameter portion, a first reduced diameter portion and a second reduced diameter portion located on either side of the expanded diameter portion, the inner diameters of the first reduced diameter portion and the second reduced diameter portion being smaller than the expanded diameter portion, and a plurality of second through holes communicating with the expanded diameter portion are equidistantly provided on the side wall of the valve seat along the circumferential direction; The valve core body is slidably connected in the first through hole. The valve core body includes a first conducting portion, a first sealing portion, a second sealing portion, and a second conducting portion in sequence along the axial direction. The first conducting portion and the second conducting portion 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 portion and the second sealing portion are respectively embedded with a first sealing ring and a second sealing ring. The first sealing ring and the second sealing ring are respectively engaged with the first reduced diameter portion and the second reduced diameter portion for sliding sealing. The first groove is communicated with the expanded diameter portion by sliding the first sealing portion toward the expanded diameter portion, and the second groove is communicated with the expanded diameter portion by sliding the second sealing portion toward the expanded diameter portion.

[0007] After adopting the above structure, a valve core assembly in the present invention has the following advantages: a valve seat is added on the basis of the existing technology, the valve core body slides in the valve seat, and exhaust and inflation are achieved by connecting the first groove with the expanded diameter portion and the second groove with the expanded diameter portion, and the first sealing ring and the second sealing ring are both embedded in the first sealing portion and the second sealing portion of the valve core body. Therefore, during the sliding process of the valve core body, the first sealing ring and the second sealing ring move with the valve core body, and there is no relative displacement between the first sealing ring, the second sealing ring and the valve core body, thereby preventing the parting line of the valve core body and the first groove and the second groove from wearing and damaging the first sealing ring and the second sealing ring. 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 sealing ring and the second sealing ring, the contact force between the first sealing ring and the second sealing ring and the first reduced diameter portion, the second reduced diameter portion and even the expanded diameter portion is more uniform, thereby reducing the wear and damage of the first sealing ring and the second sealing ring caused by stress concentration, and ensuring the effectiveness of the seal.

[0008] As an improvement, an annular groove is provided in the middle of the valve core body 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 air flow space in the expanded diameter part, so that the first groove and the expanded diameter part and the second groove and the expanded diameter part can be smoothly connected.

[0009] As an improvement, an annular guide portion is provided on the annular groove along the circumference, and 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, during the movement of the valve core body, if the displacement of the valve core body is too large, the first sealing portion and the second sealing portion may be separated from the first reduced diameter portion and the second reduced diameter portion. At this time, the guide portion is slidably connected 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.

[0010] As an improvement, a plurality of annular oil storage grooves are provided on the first conducting portion and the second conducting portion; this structure makes the sliding between the valve core body and the valve seat smoother.

[0011] As an improvement, the expanded diameter portion and the first and second reduced diameter portions are transitioned through an inclined surface. With this structure, the inclined surface can play a guiding role, assisting the first and second sealing rings to return to the first and second reduced diameter portions.

[0012] As an improvement, rounded corners are provided between the first reduced diameter portion / the second reduced diameter portion and the inclined surface and the valve seat end; this structure reduces wear and damage to the first sealing ring and the second sealing ring.

[0013] As an improvement, the depth range of the first groove and the second groove is 0.2-0.5mm; with this structure, the first groove and the second groove have a certain depth to prevent the lubricating oil between the valve seat and the valve core body from blocking the first groove and the second groove.

[0014] A second object of the present invention is to provide a cartridge height regulating valve comprising the valve core assembly described above.

[0015] After adopting the above structure, a cylindrical height regulating valve in the present invention has the following advantages: a valve seat is added on the basis of the existing technology, the valve core body slides in the valve seat, and exhaust and inflation are achieved by connecting the first groove with the expanded diameter portion and the second groove with the expanded diameter portion, and the first sealing ring and the second sealing ring are both embedded in the first sealing portion and the second sealing portion of the valve core body. Therefore, during the sliding process of the valve core body, the first sealing ring and the second sealing ring move with the valve core body, and there is no relative displacement between the first sealing ring, the second sealing ring and the valve core body, thereby preventing the parting line of the valve core body and the first groove and the second groove from wearing and damaging the first sealing ring and the second sealing ring. The valve seat is made of metal, and the first through hole is machined. Therefore, there is no parting line on the surface of the first through hole and it can be relatively flat. During the sliding process of the first sealing ring and the second sealing ring, the contact force between the first sealing ring and the second sealing ring and the first reduced diameter portion, the second reduced diameter portion and even the expanded diameter portion is more uniform, thereby reducing the wear and damage of the first sealing ring and the second sealing ring caused by stress concentration, and ensuring the effectiveness of the seal.

[0016] As an improvement, the present invention also includes a shell and a guide rod. The shell is provided with a first cavity, an installation cavity and a second cavity which are interconnected in sequence along the axial direction. The shell is provided with a first air hole connected to the first cavity, an air channel connected to the installation cavity, and a second air hole connected to the second cavity. The valve seat is connected in the installation cavity, the first groove is connected to the first cavity, the second groove is connected to the second cavity, and the guide rod is connected to the valve core body and is slidably connected to the shell. With this structure, the guide rod is connected to the operating rod to drive the valve core body to move, the first air hole and the second air hole are used for exhaust and inflation respectively, and the air channel is used to connect to the seat airbag.

[0017] As an improvement, a muffler is connected to the outer wall of the shell, and the position of the muffler corresponds to the first air hole; this structure reduces the noise during exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of embodiment 1 of the present invention.

[0019] Figure 2 It is a cross-sectional view of an embodiment of the present invention in the exhaust state.

[0020] Figure 3 This is a cross-sectional view of the first embodiment of the present invention in the inflated state.

[0021] Figure 4 This is a schematic diagram of the decomposed structure of embodiment 1 of the present invention.

[0022] Figure 5 It is a cross-sectional view of embodiment 2 of the present invention.

[0023] Figure 6 This is a schematic diagram of the decomposed structure of the second embodiment of the present invention.

[0024] Figure numerals: 1. valve seat; 2. expanded diameter portion; 3. first reduced diameter portion; 4. second reduced diameter portion; 5. second through hole; 6. valve core body; 61. first conducting portion; 62. first sealing portion; 63. second sealing portion; 64. second conducting portion; 7. first groove; 8. second groove; 9. first sealing ring; 10. second sealing ring; 11. annular groove; 12. guide portion; 13. oil storage tank; 14. inclined surface; 15. fillet; 16. guide rod; 17. first cavity; 18. mounting cavity; 19. second cavity; 20. first air hole; 21. air duct; 22. second air hole; 23. muffler; 24. first shell; 25. second shell; 26. third sealing ring; 27. fourth sealing ring; 28. fifth sealing ring; 29. ​​plugging cover; 30. pressure head; 31. lip sealing ring; 32. guide ring; 33. guide shell. DETAILED DESCRIPTION

[0025] The valve core assembly and the cylindrical height regulating valve of the present invention are described in detail below with reference to the accompanying drawings.

[0026] Example 1: like Figures 1 to 4 As shown, this embodiment involves 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 material of the valve core body 6 is the same as that in the prior art, i.e., plastic; a first through hole formed by machining is provided on the valve seat 1 along the axial direction, the first through hole includes an expanded diameter portion 2, a first reduced diameter portion 3 and a second reduced diameter portion 4 respectively located on both sides of the expanded 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 expanded diameter portion 2, and the inner diameters of the first reduced diameter portion 3 and the second reduced diameter portion 4 are the same, a second through hole 5 communicating with the expanded diameter portion 2 is provided on the side wall of the valve seat 1, and a plurality of second through holes 5 are equidistantly arranged along the circumferential direction of the side wall of the valve seat 1, and the second through holes 5 are all arranged on the side wall of the valve seat 1 corresponding to the expanded diameter portion 2.

[0027] like Figure 1 As shown, the expanded portion 2 transitions to the first and second reduced diameter portions 3, 4 via an inclined surface 14. Specifically, the inclined surface 14 is a conical surface disposed between the expanded portion 2 and the first and second reduced diameter portions 3, 4. Fillets 15 are provided between the first and second reduced diameter portions 3, 4, the inclined surface 14, and the end of the valve seat 1. In other words, fillets 15 are provided between the first reduced diameter portion 3, the inclined surface 14, and the end of the valve seat 1. Similarly, fillets 15 are provided between the second reduced diameter portion 4, the inclined surface 14, and the end of the valve seat 1. The entire first through hole, including the expanded portion 2, the first and second reduced diameter portions 3, 4, the inclined surface 14, and the fillet 15, is formed by machining. Therefore, the surface of the first through hole is smooth, avoiding the occurrence of large step-down surfaces.

[0028] like Figure 1 As shown, the valve core body 6 is slidably connected in the first through hole, and the valve core body 6 includes a first conducting portion 61, a first sealing portion 62, a second sealing portion 63 and a second conducting portion 64 in sequence along the axial direction. An annular groove 11 is provided in the middle of the valve core body 6, and the annular groove 11 is located between the first sealing portion 62 and the second sealing portion 63. That is to say, the annular groove 11 divides the valve core body 6 into two halves, left and right. The left half is provided with the first conducting portion 61 and the first sealing portion 62, and the right half is provided with the second sealing portion 63 and the second conducting portion 64. Among them, the left end of the first conducting portion 61 is the left end of the valve core body 6, and the right end of the second conducting portion 64 is the right end of the valve core body 6.

[0029] like Figure 1As shown, the first conducting portion 61 and the second conducting portion 64 are respectively provided with a first groove 7 and a second groove 8, both of which extend inward from the end of the valve core body 6 and extend to the first sealing portion 62 and the second sealing portion 63, respectively. The first sealing portion 62 and the second sealing portion 63 are respectively embedded with a first sealing ring 9 and a second sealing ring 10, and the first sealing ring 9 and the second sealing ring 10 are respectively in sliding sealing cooperation with the first reduced diameter portion 3 and the second reduced diameter portion 4.

[0030] 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 is the same as that of the first sealing portion 62 and the second sealing portion 63. The guide portion 12 can also slide in the first reduced diameter portion 3 and the second reduced diameter portion 4.

[0031] like Figure 1 and Figure 4 As shown, the first conductive portion 61 and the second conductive portion 64 are both provided with a plurality of annular oil storage grooves 13. The plurality of oil storage grooves 13 on the first conductive portion 61 are spaced apart along the axial direction and intersect with the first groove 7. The plurality of oil storage grooves 13 on the second conductive portion 64 are spaced apart along the axial direction and intersect with the second groove 8. To prevent lubricating oil from blocking the first groove 7 and the second groove 8, the first groove 7 and the second groove 8 have a certain depth. Preferably, the depth of the first groove 7 and the second groove 8 is in the range of 0.2-0.5 mm. In this embodiment, the depth of the first groove 7 and the second groove 8 is 0.3 mm.

[0032] The present invention adds a valve seat 1 on the basis of the existing technology, and the valve core body 6 slides in the valve seat 1. By sliding the first sealing part 62 toward the expanded diameter part 2, the first groove 7 is connected to the expanded diameter part 2, that is, Figure 2 By sliding the second sealing portion 63 toward the expanded diameter portion 2, the second groove 8 is connected to the expanded diameter portion 2, as shown Figure 3As shown; the first groove 7 is connected to the expanded diameter part 2 and the second groove 8 is connected to the expanded diameter part 2 to achieve exhaust and inflation, and the first sealing ring 9 and the second sealing ring 10 are both embedded in the first sealing part 62 and the second sealing part 63 of the valve core body 6. Therefore, during the sliding process of the valve core body 6, 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, thereby preventing the parting line of the valve core body 6 and the first groove 7 and the second groove 8 from wearing and damaging the first sealing ring 9 and the second sealing ring 10. The valve seat 1 is made of metal, and the first through hole is machined. Therefore, there is no parting line on the surface of the first through hole and it 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 part 3, the second reduced diameter part 4 and even the expanded diameter part 2 is more uniform, thereby reducing the wear and damage of the first sealing ring 9 and the second sealing ring 10 caused by stress concentration, thereby ensuring the effectiveness of the seal.

[0033] Example 2: like Figure 5 and Figure 6 As shown, this embodiment involves a cartridge height regulating valve, including the valve core assembly in Example 1, and also including a housing and a guide rod 16, wherein a first cavity 17, an installation cavity 18 and a second cavity 19 that are interconnected are sequentially provided in the housing along the axial direction, wherein the housing includes a first housing 24 and a second housing 25, the left end of the first housing 24 is connected to a blocking cover 29, and the left end of the second housing 25 is connected to the right end of the first housing 24, and the two are sealed by a fifth sealing ring 28, the first cavity 17 and the installation cavity 18 are arranged in the first housing 24, and the second cavity 19 is arranged in the second housing 25; the housing is provided with a first air hole 20 communicating with the first cavity 17, an air channel 21 communicating with the installation cavity 18, and a second air hole 22 communicating with the second cavity 19, wherein the first air hole 20 is arranged on the side wall of the first housing 24 corresponding to the first cavity 17, the second air hole 22 is arranged 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 installation cavity 18, and the air channel 21 is provided on the air nozzle.

[0034] like Figure 5As shown, the valve seat 1 is connected to the installation cavity 18, the second through hole 5 is connected to the air channel 21 through the installation 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 valve seat 1 is sealed with the first shell 24 and the second shell 25 through the third sealing ring 26 and the fourth sealing ring 27 respectively; the guide rod 16 is connected to the valve core body 6 and is slidably connected to the shell. Specifically, the left end of the guide rod 16 is connected to the valve core body 6, and the right end of the guide rod 16 is located in the guide shell 33. The second shell 25 is connected with the pressure head 30, the lip sealing ring 31 and the guide ring 32 from left to right in sequence, and the middle part of the guide rod 16 is slidably connected to the pressure head 30, the lip sealing ring 31 and the guide ring 32.

[0035] like Figure 6 As shown, a muffler 23 is connected to the outer wall of the shell, and the position of the muffler 23 corresponds to the first air hole 20, that is, the first air hole 20 serves as an air outlet, and a muffler 23 is arranged on the outer wall of the first shell 24. The second air hole 22 serves as an air inlet, which is connected to an external air source, and 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, and the internal gas of the seat airbag flows out from the first air hole 20 through the air duct 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, and 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 duct 21.

[0036] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above two embodiments. All other embodiments obtained by those skilled in the art without making any creative work shall fall 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 a metal material, wherein a first through hole formed by machining is provided on the valve seat (1) along the axial direction, wherein the first through hole comprises an expanded diameter portion (2), a first reduced diameter portion (3) and a second reduced diameter portion (4) respectively located on both sides of the expanded diameter portion (2), wherein the inner diameters of the first reduced diameter portion (3) and the second reduced diameter portion (4) are both smaller than the expanded diameter portion (2), and a plurality of second through holes (5) communicating with the expanded diameter portion (2) are provided on the side wall of the valve seat (1) at equal intervals along the circumferential direction; The valve core body (6) is slidably connected in the first through hole. The valve core body (6) includes a first conducting portion (61), a first sealing portion (62), a second sealing portion (63) and a second conducting portion (64) in sequence along the axial direction. The first conducting portion (61) and the second conducting portion (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 portion (62) and the second sealing portion (63) are respectively embedded 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 engaged with the first reduced diameter portion (3) and the second reduced diameter portion (4) in a sliding and sealing manner.

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

3. The valve core assembly according to claim 2, characterized in that: 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.

4. The valve core assembly according to claim 1, characterized in that: A plurality of annular oil storage grooves (13) are provided on the first conducting portion (61) and the second conducting portion (64).

5. The valve core assembly according to claim 1, characterized in that: The expanded diameter portion (2) and the first reduced diameter portion (3) and the second reduced diameter portion (4) are transitioned via an inclined surface (14).

6. The valve core assembly according to claim 5, characterized in that: Rounded corners (15) are provided between the first reduced diameter portion (3) / the second reduced diameter portion (4), 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 of the first groove (7) and the second groove (8) are both in the range of 0.2-0.5 mm.

8. A cartridge height regulating valve, characterized in that: Comprising the valve core assembly according to any one of claims 1 to 7.

9. The cartridge type height regulating valve according to claim 8, characterized in that: The valve seat (1) further comprises a housing and a guide rod (16), wherein a first cavity (17), a mounting cavity (18) and a second cavity (19) are sequentially arranged in the housing along the axial direction and are interconnected. The housing is provided with 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 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 cartridge type height regulating valve according to claim 9, characterized in that: A muffler (23) is connected to the outer wall of the shell, and the position of the muffler (23) corresponds to the first air hole (20).

Images