Pressure retaining valve and vehicle

Abstract

The pressure retaining valve comprises a pressure retaining valve body, a connecting body, a sealing piece and a valve plate set, a first air channel is formed in the pressure retaining valve body, the connecting body is arranged on the pressure retaining valve body, a second air channel is formed in the connecting body, the sealing piece is arranged between the pressure retaining valve body and the connecting body, the sealing piece seals the first air channel, and the valve plate set is arranged on the connecting body. The valve block set is arranged between the connecting body and the sealing piece and comprises a plurality of spring pieces which are arranged in a stacked mode. The sealing piece and the valve plate group are arranged between the pressure retaining valve main body and the connecting main body, so that the sealing piece and the valve plate group selectively communicate with the first air channel in the pressure retaining valve main body and the second air channel in the connecting main body, the consistency and durability of the pressure retaining valve can be improved, the stability of the pressure retaining valve can be improved, and the service life of the pressure retaining valve is prolonged. Therefore, the product competitiveness of the pressure retaining valve can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a pressure maintaining valve and a vehicle. Background Art

[0002] At present, the pressure maintaining valve is an important component in the air spring system. The pressure maintaining valve can maintain the stability of the gas pressure inside the air spring and prevent insufficient internal pressure in the air spring due to gas leakage. However, it will cause the bladder skin of the elastic element to torsion and deform, thereby affecting the durability of the air spring bladder skin. Moreover, the unstable pressure maintaining capacity of the pressure maintaining valve will affect the consistency of the air spring product, thereby affecting the consistency of the vehicle assembly, and further resulting in a low offline inspection pass rate for the vehicle.

[0003] In the related art, the pressure-maintaining capacity of the pressure-maintaining valve depends on the built-in coil spring, but the stiffness consistency of the coil spring is poor, and the stiffness durability of the coil spring will also decay over time. When the spatial structure is fixed, the adjustable range of the stiffness of the coil spring is small, so the stability of the pressure-maintaining valve cannot be guaranteed, which in turn affects the reliability of the pressure-maintaining valve. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a pressure-maintaining valve, which can improve the rigidity consistency and durability, and can also improve the stability.

[0005] The utility model further provides a vehicle.

[0006] According to the pressure-maintaining valve of the utility model, it includes: a pressure-maintaining valve body, a connecting body, a sealing member and a valve sheet group, the pressure-maintaining valve body forms a first air channel, the connecting body is arranged on the pressure-maintaining valve body, the connecting body forms a second air channel, the sealing member is arranged between the pressure-maintaining valve body and the connecting body, the sealing member seals the first air channel, the valve sheet group is arranged between the connecting body and the sealing member, and the valve sheet group includes a plurality of stacked spring sheets.

[0007] According to the pressure-maintaining valve of the utility model, a sealing member and a valve plate group are arranged between the pressure-maintaining valve body and the connecting body. Such an arrangement enables the sealing member and the valve plate group to selectively connect the first air channel in the pressure-maintaining valve body with the second air channel in the connecting body, thereby improving the consistency and durability of the pressure-maintaining valve, and also improving the stability of the pressure-maintaining valve, thereby improving the product competitiveness of the pressure-maintaining valve.

[0008] In some examples of the present invention, the plurality of spring sheets include: a plurality of flat spring sheets and a non-flat spring sheet, the plurality of flat spring sheets are stacked, and the non-flat spring sheet abuts against one of the plurality of flat spring sheets away from the pressure retaining valve body.

[0009] In some examples of the present invention, the non-flat spring sheet includes: a main sheet portion and a plurality of claws, wherein the plurality of claws are respectively connected to the main sheet portion and are distributed at intervals along the circumference of the main sheet portion, the claws are bent relative to the main sheet portion, and the plurality of claws are respectively abutted against one of the plurality of flat spring sheets that is away from the pressure-maintaining valve body.

[0010] In some examples of the present invention, at least one of the flat spring sheets is provided with a plurality of weight-reducing holes, and the plurality of weight-reducing holes are distributed at intervals along the circumference of the corresponding flat spring sheet.

[0011] In some examples of the present invention, at least one of the flat spring sheets includes: a first flat spring member, a second flat spring member and a third flat spring member, the weight-reducing hole on the first flat spring member is configured as a long strip hole extending radially, the weight-reducing hole on the second flat spring member is configured on the outer periphery of the second flat spring member and the width increases radially away from the center of the second flat spring member, and the weight-reducing hole on the third flat spring member is configured as an arc-shaped hole extending circumferentially of the third flat spring member.

[0012] In some examples of the present invention, the connecting body is provided with a pipe extending toward the pressure-maintaining valve body, the plurality of spring sheets are each formed with a first through hole, the sealing member is formed with a second through hole, and the pipe passes through the first through hole and the second through hole.

[0013] In some examples of the present invention, the pressure-maintaining valve further includes: a support member, wherein the support member is supported between the connecting body and one of the plurality of spring leaves that is away from the pressure-maintaining valve body.

[0014] In some examples of the present invention, the thickness of the support member is L1, and the outer diameter is d1, and L1 and d1 satisfy the relationship: 0.5mm≤L1≤1.5mm, 5.5mm≤d1≤6.5mm.

[0015] In some examples of the present invention, the thickness of the spring sheet is L2, and the outer diameter is d2, and L2 and d2 satisfy the relationship: 0.3mm≤L2≤0.4mm, 10.5mm≤d2≤11.5mm.

[0016] The vehicle according to the utility model comprises: the pressure maintaining valve mentioned above.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a cross-sectional view of a pressure-maintaining valve according to an embodiment of the utility model;

[0020] Figure 2 It is a partial structural schematic diagram of a pressure-maintaining valve according to an embodiment of the utility model.

[0021] Reference numerals:

[0022] 1. Pressure maintaining valve;

[0023] 2. Pressure-maintaining valve body; 3. Connecting body; 31. Second air passage; 4. Sealing member; 41. Second through hole; 5. Valve plate assembly; 51. Flat spring plate; 511. Weight-reducing hole; 512. First flat spring member; 513. Second flat spring member; 514. Third flat spring member; 52. Non-flat spring plate; 521. Main plate portion; 522. Support claw; 53. First through hole; 6. Support member. DETAILED DESCRIPTION

[0024] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0025] Reference below Figure 1 and Figure 2 A pressure-maintaining valve 1 according to an embodiment of the utility model is described. The pressure-maintaining valve 1 is applied to an air spring system in a vehicle.

[0026] like Figure 1 and Figure 2 As shown, according to the utility model, the pressure-maintaining valve 1 includes: a pressure-maintaining valve body 2, a connecting body 3, a sealing member 4 and a valve sheet group 5, the pressure-maintaining valve body 2 forms a first air passage, the connecting body 3 is arranged on the pressure-maintaining valve body 2, the connecting body 3 forms a second air passage 31, the sealing member 4 is arranged between the pressure-maintaining valve body 2 and the connecting body 3, the sealing member 4 seals the first air passage, the valve sheet group 5 is arranged between the connecting body 3 and the sealing member 4, and the valve sheet group 5 includes a plurality of stacked spring sheets.

[0027] It can be understood that the pressure-maintaining valve body 2, the connecting body 3, the sealing member 4 and the valve plate group 5 constitute the main structure of the pressure-maintaining valve 1. One end of the pressure-maintaining valve body 2 is connected to the air intake pipe, the connecting body 3 is arranged at the other end of the pressure-maintaining valve body 2, and the connecting body 3 is connected to the air spring, so that the pressure-maintaining valve 1 can be located between the air spring and the air intake pipe. A first air passage is arranged in the pressure-maintaining valve body 2, and a second air passage 31 is arranged in the connecting body 3. The first air passage and the second air passage 31 are connected, so that the gas in the air intake pipe can pass through the first air passage. In the first air channel and the second air channel 31 and then in the air spring, the seal 4 and the valve plate group 5 are located between the pressure-maintaining valve body 2 and the connecting body 3. This arrangement enables the seal 4 to seal the entrance of the first air channel into the second air channel 31, so that the seal 4 and the valve plate group 5 can selectively connect the first air channel and the second air channel 31, and the valve plate group 5 is composed of a plurality of spring plates, so that the valve plate group 5 has elastic force, thereby improving the consistency and durability of the pressure-maintaining valve 1, and the continuity of the intake and exhaust of the pressure-maintaining valve 1. For example, the seal 4 is a rubber pad, so that the seal 4 has elastic force, and then it is convenient for the seal 4 to seal the first air channel.

[0028] Therefore, by arranging the sealing member 4 and the valve plate group 5 between the pressure-maintaining valve body 2 and the connecting body 3, such an arrangement can enable the sealing member 4 and the valve plate group 5 to selectively connect the first air channel in the pressure-maintaining valve body 2 with the second air channel 31 in the connecting body 3, thereby improving the consistency and durability of the pressure-maintaining valve 1, and also improving the stability of the pressure-maintaining valve 1, thereby improving the product competitiveness of the pressure-maintaining valve 1.

[0029] Among them, Figure 2 As shown, the multiple spring sheets include: a non-flat spring sheet 52 and multiple flat spring sheets 51, the multiple flat spring sheets 51 are stacked, and the non-flat spring sheet 52 abuts against one of the multiple flat spring sheets 51 away from the pressure-maintaining valve body 2. In other words, the non-flat spring sheet 52 and the multiple flat spring sheets 51 constitute the main structure of the spring sheet, the multiple flat spring sheets 51 are stacked along the length direction of the pressure-maintaining valve body 2, and the non-flat spring sheet 52 is arranged on the side of the flat spring sheet 51 away from the sealing member 4, so that the sealing member 4, the multiple flat spring sheets 51 and the non-flat spring sheet 52 can be stacked in sequence, and such a configuration can make the spring sheet have elastic force, so that the compression and recovery of the multiple spring sheets can selectively connect the first air channel and the second air channel 31, thereby improving the consistency and durability of the pressure-maintaining valve 1.

[0030] In addition, if Figure 2As shown, the non-flat spring sheet 52 includes: a main sheet 521 and a plurality of claws 522, the plurality of claws 522 are respectively connected to the main sheet 521 and are spaced apart along the circumference of the main sheet 521, the claws 522 are bent relative to the main sheet 521, and the plurality of claws 522 are respectively in contact with one of the plurality of flat spring sheets 51 away from the pressure-maintaining valve body 2. It can be understood that the main sheet 521 and the plurality of claws 522 constitute the main structure of the non-flat spring sheet 52, the plurality of claws 522 are evenly spaced at the outer peripheral edge of the main sheet 521, and the plurality of claws 522 are bent toward the direction of the flat spring sheet 51, such a setting can make the non-flat spring sheet 52 fit more firmly with the flat spring sheet 51 away from the sealing member 4, thereby improving the consistency and durability of the pressure-maintaining valve 1. For example, three claws 522 are arranged at the outer peripheral edge of the main sheet 521, so that the non-flat spring sheet 52 can fit more firmly with the flat spring sheet 51 away from the sealing member 4.

[0031] In particular, if Figure 2 As shown, at least one flat spring sheet 51 is provided with a plurality of weight-reducing holes 511, and the plurality of weight-reducing holes 511 are distributed at intervals along the circumference of the corresponding flat spring sheet 51. In other words, the plurality of flat spring sheets 51 are provided with weight-reducing holes 511, and the weight-reducing holes 511 are evenly distributed at intervals circumferentially on each flat spring sheet 51, thereby achieving a lightweight design of the pressure-retaining valve 1 and ensuring the consistency of the pressure-retaining valve 1.

[0032] In addition, if Figure 2 As shown, at least one flat spring sheet 51 includes: a first flat spring member 512, a second flat spring member 513 and a third flat spring member 514. The weight-reducing hole 511 on the first flat spring member 512 is configured as a long strip hole extending radially. The weight-reducing hole 511 on the second flat spring member 513 is configured on the outer periphery of the second flat spring member 513 and has a width that increases radially away from the center of the second flat spring member 513. The weight-reducing hole 511 on the third flat spring member 514 is configured as an arc-shaped hole extending circumferentially of the third flat spring member 514. It can be understood that the first flat spring member 512, the second flat spring member 513 and the third flat spring member 514 are stacked in sequence along the length direction of the pressure-maintaining valve body 2, so that the flat spring sheet 51 has elastic force, and the weight-reducing hole 511 on the first flat spring member 512 is a long strip extending radially, the weight-reducing hole 511 of the second flat spring member 513 is located at the outer peripheral edge of the second flat spring member 513, and the weight-reducing hole 511 of the third flat spring member 514 is an arc-shaped hole extending circumferentially, so that the lightweight design of the first flat spring member 512, the second flat spring member 513 and the third flat spring member 514 can be achieved.

[0033] In addition, if Figure 2As shown, the connecting body 3 is provided with a pipeline extending toward the pressure-maintaining valve body 2, a plurality of spring sheets are formed with a first through hole 53, a sealing member 4 is formed with a second through hole 41, and the pipeline passes through the first through hole 53 and the second through hole 41. In other words, the middle of the plurality of spring sheets are provided with a first through hole 53, the middle of the sealing member 4 is provided with a second through hole 41, and the plurality of spring sheets and the sealing member 4 are arranged in a stacked manner, so that the first through hole 53 and the second through hole 41 can be connected, thereby connecting the first airway and the second airway 31, and further enabling the pressure-maintaining valve 1 to inlet and exhaust air.

[0034] In addition, Figure 1 and Figure 2 As shown, the pressure-maintaining valve 1 further includes: a support member 6, which is supported between the connecting body 3 and one of the plurality of spring sheets away from the pressure-maintaining valve body 2. It can be understood that the support member 6 is located on the side of the non-flat spring sheet 52 away from the sealing member 4, so that the sealing member 4, the flat spring sheet 51, the non-flat spring sheet 52 and the support member 6 can be stacked and arranged in sequence, so that the pressure-maintaining pressure value of the pressure-maintaining valve 1 can be adjusted according to the size of the support member 6, thereby facilitating the air intake and exhaust of the pressure-maintaining valve 1.

[0035] Alternatively, if Figure 2 As shown, the thickness of the support member 6 is L1, and the outer diameter is d1. L1 and d1 satisfy the relationship: 0.5mm≤L1≤1.5mm, 5.5mm≤d1≤6.5mm. In other words, the thickness and outer diameter of the support member 6 must be within a reasonable range. The thickness of the support member 6 cannot be less than 0.5mm, which will cause the pre-pressure value of the pressure-maintaining valve 1 to be too small, resulting in a too long air intake time. It cannot be greater than 1.5mm, which will cause the pre-pressure value of the pressure-maintaining valve 1 to be too large, resulting in a too short air intake time. Similarly, the outer diameter of the support member 6 cannot be less than 5.5mm, nor can it be greater than 6.5mm, which will also cause the pre-pressure value of the pressure-maintaining valve 1 to be inconsistent with the actual value. If the thickness and outer diameter of the support member 6 are within a reasonable range, such a setting is convenient for the air intake and exhaust of the pressure-maintaining valve 1. For example, the thickness of the support member 6 is 1mm, and the outer diameter is 5.8mm, so that the pre-pressure value of the pressure-maintaining valve 1 can be guaranteed to be suitable for daily use. The pre-pressure value can also be adjusted according to the actual situation by changing the thickness and outer diameter of the support member 6.

[0036] In particular, if Figure 2As shown, the thickness of the spring sheet is L2, and the outer diameter is d2. L2 and d2 satisfy the relationship: 0.3mm≤L2≤0.4mm, 10.5mm≤d2≤11.5mm. It can be understood that the thickness and outer diameter of the spring sheet should be within a reasonable range. The thickness of the spring sheet cannot be less than 0.3mm, which will cause the pre-pressure value of the pressure-maintaining valve 1 to be too small, resulting in too long air intake time. It cannot be greater than 0.4mm, which will cause the pre-pressure value of the pressure-maintaining valve 1 to be too large, resulting in too short air intake time. Similarly, the outer diameter of the spring sheet cannot be less than 10.5mm, nor can it be greater than 11.5mm, which will also cause the pre-pressure value of the pressure-maintaining valve 1 to be inconsistent with the actual value. If the thickness and outer diameter of the spring sheet are within a reasonable range, such a setting is convenient for the air intake and exhaust of the pressure-maintaining valve 1. For example, the outer diameter of the spring sheet is 11mm, so that the pre-pressure value of the pressure-maintaining valve 1 can be guaranteed to be suitable for daily use. The pre-pressure value can also be adjusted according to the actual situation by changing the thickness and outer diameter of the spring sheet.

[0037] Specifically, when the pressure-maintaining valve 1 uses the inflation function, as the inflation pressure increases, the force on the seal 4 and the multiple spring leaves increases accordingly. When the inflation pressure is greater than the pre-pressure value of the pressure-maintaining valve 1, a gap is created between the seal 4 and the first air channel, allowing the gas to enter the second air channel 31; when the internal pressure of the air spring reaches a certain limit, the gas in the air spring prompts the multiple spring leaves to move, so that the pressure in the air spring is the same as the pre-pressure value of the pressure-maintaining valve 1, which is generally set to 2-3 bar, so that the inflation effect can be achieved.

[0038] The vehicle according to the embodiment of the utility model includes: the pressure-maintaining valve 1 of the above embodiment, by arranging a sealing member 4 and a valve plate group 5 between the pressure-maintaining valve body 2 and the connecting body 3, so that the sealing member 4 and the valve plate group 5 can selectively connect the first air channel in the pressure-maintaining valve body 2 with the second air channel 31 in the connecting body 3, thereby improving the consistency and durability of the pressure-maintaining valve 1, and also improving the stability of the pressure-maintaining valve 1, thereby improving the product competitiveness of the pressure-maintaining valve 1.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0042] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pressure-maintaining valve, characterized in that: include: A pressure-maintaining valve body (2), wherein the pressure-maintaining valve body (2) is formed with a first air passage; A connecting body (3), the connecting body (3) being arranged on the pressure-maintaining valve body (2), the connecting body (3) being formed with a second air passage (31); A sealing member (4), the sealing member (4) being arranged between the pressure-maintaining valve body (2) and the connecting body (3), the sealing member (4) sealing the first air passage; A valve sheet group (5), the valve sheet group (5) is arranged between the connecting body (3) and the sealing member (4), and the valve sheet group (5) comprises a plurality of spring sheets arranged in a stacked manner.

2. The pressure-maintaining valve according to claim 1, characterized in that: The plurality of spring sheets include: A plurality of flat spring sheets (51), wherein the plurality of flat spring sheets (51) are stacked; A non-flat spring sheet (52), wherein the non-flat spring sheet (52) abuts against one of the plurality of flat spring sheets (51) that is away from the pressure-maintaining valve body (2).

3. The pressure-maintaining valve according to claim 2, characterized in that: The non-flat spring sheet (52) comprises: Main film department (521); A plurality of claws (522), the plurality of claws (522) are respectively connected to the main sheet portion (521) and are spaced apart along the circumference of the main sheet portion (521), the claws (522) are bent relative to the main sheet portion (521), and the plurality of claws (522) are respectively in contact with one of the plurality of flat spring sheets that is away from the pressure retaining valve body (2).

4. The pressure-maintaining valve according to claim 2, characterized in that: At least one of the flat spring sheets (51) is provided with a plurality of weight-reducing holes (511), and the plurality of weight-reducing holes (511) are distributed at intervals along the circumference of the corresponding flat spring sheet.

5. The pressure-maintaining valve according to claim 4, characterized in that: At least one of the flat spring pieces (51) comprises: A first flat spring member (512), wherein the weight-reducing hole (511) on the first flat spring member (512) is configured as a long strip-shaped hole extending in the radial direction; and / or A second flat spring member (513), wherein the weight-reducing hole (511) on the second flat spring member (513) is configured on the outer periphery of the second flat spring member (513) and has a width that gradually increases in a radial direction away from the center of the second flat spring member (513); and / or A third flat spring member (514), wherein the weight-reducing hole (511) on the third flat spring member (514) is configured as an arc-shaped hole extending along the circumference of the third flat spring member (514).

6. The pressure-maintaining valve according to claim 1, characterized in that: The connecting body (3) is provided with a pipeline extending toward the pressure-maintaining valve body (2), the plurality of spring sheets are each formed with a first through hole (53), the sealing member (4) is formed with a second through hole (41), and the pipeline passes through the first through hole (53) and the second through hole (41).

7. The pressure-maintaining valve according to claim 1, characterized in that: Also includes: A support member (6) is supported between the connecting body (3) and one of the plurality of spring leaves that is away from the pressure-maintaining valve body (2).

8. The pressure-maintaining valve according to claim 7, characterized in that: The support member (6) has a thickness of L1 and an outer diameter of d1, and L1 and d1 satisfy the relationship: 0.5 mm ≤ L1 ≤ 1.5 mm, 5.5 mm ≤ d1 ≤ 6.5 mm.

9. The pressure-maintaining valve according to claim 1, characterized in that: The thickness of the spring sheet is L2, and the outer diameter is d2. L2 and d2 satisfy the relationship: 0.3mm≤L2≤0.4mm, 10.5mm≤d2≤11.5mm.

10. A vehicle, characterized in that: include: The pressure-maintaining valve (1) according to any one of claims 1 to 9.

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