Piston valve and vibration damper

Abstract

The utility model relates to the technical field of automobile parts, and provides a piston valve and a shock absorber. The piston valve includes: a piston valve body fitted to a connecting rod end of the shock absorber; the mute cavity is assembled at the first end of the piston valve body and avoids the damping channel of the piston valve body; the height piece and the first spring piece are stacked in the mute cavity; the sealing gasket is flush with the port of the mute cavity and seals and covers the port of the mute cavity; the piston valve body and the silence cavity are provided with communicated gap channels, and a notch is formed in an end opening of the silence cavity, and a gap is formed between the notch and the sealing gasket. Through cooperation of the mute cavity assembled in the piston valve body, the height piece and the first spring piece which are stacked in the mute cavity, the sealing gasket covering the end opening of the mute cavity and other components, it is guaranteed that the working performance of the piston valve is not affected, and the driving stability and riding comfort of a vehicle are guaranteed; the working noise of the piston valve and the shock absorber is reduced, and the NVH performance of a vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a piston valve and a shock absorber. Background Art

[0002] With the rapid development of the automotive industry, users have higher and higher requirements for the NVH (Noise, Vibration, Harshness) performance of vehicles. Especially for new energy vehicles, since there is no noise impact from traditional engines, the NVH requirements for the whole vehicle are higher.

[0003] Shock absorbers generate a lot of noise when working, which is one of the sources of noise in vehicles. Among them, the piston valve system is a major factor causing the noise of shock absorbers. During the operation of the shock absorber, the piston valve system moves with the connecting rod of the shock absorber, rubs and vibrates with the oil, and generates noise.

[0004] How to reduce the working noise of the piston valve system and thus reduce the working noise of the shock absorber is a problem that needs to be solved urgently.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] The utility model provides a piston valve and shock absorber with upgraded structures. By cooperating with components such as a silent chamber assembled on a piston valve body, a height plate and a first spring plate stacked in the silent chamber, and a sealing gasket covering a port of the silent chamber, the working noise of the piston valve is reduced while ensuring that the working performance of the piston valve is not affected, thereby ensuring the driving stability and riding comfort of the vehicle, thereby reducing the working noise of the shock absorber and improving the NVH performance of the vehicle.

[0007] One aspect of the utility model provides a piston valve, including a piston valve body assembled on the connecting rod end of a shock absorber, and also including: a silent chamber, assembled on the first end of the piston valve body and avoiding the damping channel of the piston valve body; a height plate and a first spring plate, stacked in the silent chamber; a sealing gasket, flush with the port of the silent chamber, and sealingly covering the port of the silent chamber; wherein the piston valve body and the silent chamber are provided with a connected gap passage, and the port of the silent chamber is provided with a notch forming a gap with the sealing gasket.

[0008] In some embodiments, the piston valve body is provided with a threaded through hole, and the silent chamber is provided with an installation through hole; the silent chamber and the piston valve body are assembled by bolts passing through the installation through hole and being tightened to the threaded through hole, and the gap passage is formed between the bolts, the threaded through hole and the installation through hole.

[0009] In some embodiments, a second spring sheet is disposed between the nut of the bolt and the sealing gasket.

[0010] In some embodiments, the height sheet includes a plurality of sheets stacked in sequence.

[0011] In some embodiments, the first spring sheet includes a plurality of sheets stacked in sequence, and the first spring sheet is stacked between the height sheet and the sealing gasket.

[0012] In some embodiments, the piston valve further includes: an overflow valve plate, stacked between the bottom of the silent chamber and the height plate; and a butterfly valve plate, stacked between the overflow valve plate and the height plate.

[0013] In some embodiments, the piston valve further comprises: a guide gasket, which is assembled at the second end of the piston valve body and avoids the damping channel of the piston valve body.

[0014] Another aspect of the utility model provides a shock absorber, wherein the connecting rod end of the shock absorber is equipped with a piston valve as described in any of the above embodiments.

[0015] Compared with the prior art, the beneficial effects of the present invention include at least:

[0016] The piston valve of the utility model, through the cooperation of components such as a silent chamber assembled on a piston valve body, a height plate and a first spring plate stacked in the silent chamber, and a sealing gasket covering the port of the silent chamber, ensures that the working performance of the piston valve is not affected, thereby ensuring the driving stability and riding comfort of the vehicle, while reducing the working noise of the piston valve, thereby reducing the working noise of the shock absorber and improving the NVH performance of the vehicle.

[0017] Among them, the silent chamber avoids the damping channel of the piston valve body, which can avoid affecting the working performance of the piston valve body and ensure that the upper working chamber and the lower working chamber realize oil exchange through the damping channel during the operation of the shock absorber. Of course, the shock absorber is also equipped with other valve systems to realize oil exchange between different working chambers, and the utility model does not limit this. The height sheet is stacked in the silent chamber, and the thickness / number of the height sheet can be adjusted as needed to ensure that the sealing gasket is flush with the port of the silent chamber so that the port of the silent chamber can be sealed and covered; the first spring sheet is also stacked in the silent chamber, which, on the one hand, plays a role in assisting in adjusting the height of the sealing gasket, and on the other hand, can elastically press the height sheet to avoid the height sheet from vibrating and generating noise under the action of oil. During the operation of the shock absorber, part of the oil can flow into the silent chamber from the gap passage along the connecting rod and be stored in the silent chamber. The vibration generated by this part of the oil is absorbed by the silent chamber, which can effectively reduce the vibration of the shock absorber valve system parts, thereby reducing the working noise of the shock absorber. In addition, the port of the silent chamber is provided with a notch for forming a gap with the sealing gasket, and the notch cooperates with the gap passage to realize that as the connecting rod moves, the silent chamber dynamically absorbs part of the oil to ensure the normal operation of the shock absorber and continuously and effectively reduce the operating noise of the shock absorber.

[0018] The piston valve of the utility model is suitable for any vehicle that needs to reduce the operating noise of the shock absorber, especially new energy vehicles, such as new energy commercial vehicles, and can significantly improve the NVH performance of the vehicle.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a piston valve in an embodiment of the utility model is shown;

[0022] Figure 2 A schematic cross-sectional view of a piston valve in an embodiment of the utility model is shown;

[0023] Figure 3 A schematic diagram of the exploded structure of the mute chamber and its matching components in an embodiment of the utility model is shown;

[0024] Figure 4A schematic diagram showing the structure of a piston valve assembled on a shock absorber in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art.

[0026] The accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar structures, and thus their repeated description will be omitted.

[0027] The words "first", "second" and similar words used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. The orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom" and the like are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations on the present utility model. The term "plurality" means two or more, unless otherwise clearly and specifically defined. In addition, in the description of the present utility model, when it is said that a device is "connected" to another device, this includes not only direct connections, but also indirect connections through other elements.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in different embodiments may be combined with each other.

[0029] Figure 1 The three-dimensional structure of the piston valve in the embodiment of the utility model is shown in FIG. Figure 2 The cross-sectional structure of the piston valve is shown. Figure 3 The decomposition structure of the silent chamber of the piston valve and its matching parts is shown. Figure 4 The structure of the piston valve being assembled on the shock absorber is shown; Figures 1 to 4 As shown, the piston valve 100 provided by the utility model includes:

[0030] A piston valve body 110 mounted on the end of a connecting rod 220 of a shock absorber 200;

[0031] The silent chamber 120 is assembled at the first end of the piston valve body 110 and avoids the damping channel of the piston valve body 110;

[0032] The height sheet 130 and the first spring sheet 140 are stacked in the mute cavity 120;

[0033] The sealing gasket 150 is flush with the port of the silent chamber 120 and seals and covers the port of the silent chamber 120;

[0034] The piston valve body 110 and the silent chamber 120 are provided with a communicating gap passage, and the port of the silent chamber 120 is provided with a notch 122 forming a gap with the sealing gasket 150 .

[0035] The piston valve 100 of the utility model, through the cooperation of the silent chamber 120 assembled on the piston valve body 110, the height plate 130 and the first spring plate 140 stacked in the silent chamber 120, and the sealing gasket 150 covering the port of the silent chamber 120, etc., ensures that the working performance of the piston valve 100 is not affected to ensure the driving stability and riding comfort of the vehicle, while reducing the working noise of the piston valve 100, thereby reducing the working noise of the shock absorber 200 and improving the NVH performance of the vehicle.

[0036] The silent chamber 120 avoids the damping channel of the piston valve body 110, which can avoid affecting the working performance of the piston valve body 110 and ensure that the upper working chamber 200a and the lower working chamber 200b can exchange oil through the damping channel during the operation of the shock absorber 200 ( Figure 2 The middle arrow R1 indicates the path for the oil to be exchanged through the damping channel). Of course, the shock absorber 200 is also equipped with other valve systems to realize the oil exchange between different working chambers, and the present invention does not limit this. The height sheet 130 is stacked in the silent chamber 120. The thickness and number of the height sheet 130 can be adjusted as needed to ensure that the sealing gasket 150 is flush with the port of the silent chamber 120 so that the port of the silent chamber 120 can be sealed and covered; the first spring sheet 140 is also stacked in the silent chamber 120. On the one hand, it plays a role in assisting in adjusting the height of the sealing gasket 150, and on the other hand, it can elastically press the height sheet 130 to prevent the height sheet 130 from vibrating and generating noise under the action of the oil. During the operation of the shock absorber 200, part of the oil can flow from the gap passage along the connecting rod 220 into the silent chamber 120 and be stored in the silent chamber 120. The vibration generated by this part of the oil is absorbed by the silent chamber 120, which can effectively reduce the vibration of the valve system parts of the shock absorber 200, thereby reducing the working noise of the shock absorber 200. In addition, the port of the silent chamber 120 is provided with a notch 122 for forming a gap with the sealing gasket 150. The notch 122 cooperates with the gap passage ( Figure 2 The middle arrow R2 indicates the path of the oil entering the silent chamber 120 through the gap passage, and the arrow R3 indicates the path of the oil partially discharged from the silent chamber 120 through the notch 122), so that as the connecting rod 220 moves, the silent chamber 120 dynamically absorbs part of the oil to ensure the normal operation of the shock absorber 200 and continuously and effectively reduce the working noise of the shock absorber 200.

[0037] The piston valve 100 of the utility model is suitable for any vehicle that needs to reduce the working noise of the shock absorber 200, especially new energy vehicles, such as new energy commercial vehicles, and can significantly improve the NVH performance of the vehicle.

[0038] In some embodiments, the piston valve body 110 is provided with a threaded through hole, and the silent chamber 120 is provided with an installation through hole; the silent chamber 120 and the piston valve body 110 are assembled by passing a bolt 160 through the installation through hole and tightening it to the threaded through hole, and a gap passage is formed between the bolt and the threaded through hole and the installation through hole.

[0039] The silent chamber 120 and the piston valve body 110 are assembled by passing the bolt 160 through the mounting through hole and tightening it in the threaded through hole; in addition, by adjusting the tightening torque and cooperating with the valve plate combination in the silent chamber 120, it is ensured that the height of the sealing gasket 150 is exactly flush with the port of the silent chamber 120, thereby sealing and covering the port of the silent chamber 120.

[0040] In some embodiments, a second spring sheet 170 is disposed between the nut 166 of the bolt 160 and the sealing gasket 150. The second spring sheet 170 enables a sealed, stable, and buffered fit between the nut 166 and the sealing gasket 150.

[0041] In some embodiments, the height sheet 130 includes a plurality of sheets stacked in sequence. The thickness and number of the height sheets 130 can be adjusted as needed to ensure that the sealing gasket 150 is flush with the port of the silent chamber 120 so as to seal and cover the port of the silent chamber 120 . Figure 2 and Figure 3 In the figure, it is shown that the height sheet 130 includes four sheets stacked in sequence, but the present invention is not limited thereto.

[0042] In some embodiments, the first spring sheet 140 includes a plurality of sheets stacked in sequence, and the first spring sheet 140 is stacked between the height sheet 130 and the sealing gasket 150. The thickness and number of the first spring sheets 140 are also adjusted as needed to assist in adjusting the height of the sealing gasket 150 and elastically compress the height sheet 130. Figure 2 and Figure 3 In the figure, it is shown that the first spring sheet 140 includes three sheets stacked in sequence, but the present invention is not limited thereto.

[0043] In some embodiments, the piston valve 100 further includes: an overflow valve plate 180, which is stacked between the bottom of the silent chamber 120 and the height plate 130; and a butterfly valve plate 188, which is stacked between the overflow valve plate 180 and the height plate 130. The overflow valve plate 180 and the butterfly valve plate 188 play a role in adjusting the damping force, so that the silent chamber 120 can provide a suitable damping force, which assists in the vibration reduction and buffering effect.

[0044] In some embodiments, the piston valve 100 further includes: a guide gasket 190, which is assembled at the second end of the piston valve body 110 and avoids the damping channel of the piston valve body 110. The guide gasket 190 is assembled at the second end of the piston valve body 110 to balance the overall structural strength of the piston valve 100 and play a guiding and positioning role. The piston valve 100 can be positioned and assembled with the end of the connecting rod 220 through the guide gasket 190.

[0045] Reference Figure 4 , and combined Figures 1 to 3 As shown, the embodiment of the utility model further provides a shock absorber 200, the end of the connecting rod 220 of the shock absorber 200 is equipped with the above-mentioned piston valve 100, which can reduce the working noise of the piston valve 100 while ensuring that the working performance of the piston valve 100 is not affected to ensure the driving stability and ride comfort of the vehicle, thereby reducing the working noise of the shock absorber 200 and improving the NVH performance of the vehicle through the cooperation of the silent chamber 120 assembled on the piston valve body 110, the height plate 130 and the first spring plate 140 stacked in the silent chamber 120, and the sealing gasket 150 covering the port of the silent chamber 120.

[0046] The shock absorber 200 of the present invention is suitable for any vehicle that needs to reduce noise and improve NVH performance, especially new energy vehicles, such as new energy commercial vehicles.

[0047] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A piston valve, comprising a piston valve body mounted on the end of a connecting rod of a shock absorber, characterized in that: Also includes: A silent chamber, mounted at the first end of the piston valve body and avoiding the damping channel of the piston valve body; A height sheet and a first spring sheet are stacked in the mute cavity; A sealing gasket, flush with the port of the silent chamber, and sealingly covers the port of the silent chamber; Wherein, the piston valve body and the silent chamber are provided with a communicating gap passage, and the port of the silent chamber is provided with a notch forming a gap with the sealing gasket.

2. The piston valve according to claim 1, characterized in that The piston valve body is provided with a threaded through hole, and the silent chamber is provided with a mounting through hole; The silent chamber and the piston valve body are assembled by bolts passing through the mounting through hole and being tightened in the threaded through hole, and the gap passage is formed between the bolts, the threaded through hole and the mounting through hole.

3. The piston valve according to claim 2, characterized in that A second spring sheet is arranged between the nut of the bolt and the sealing gasket.

4. The piston valve according to claim 1, characterized in that The height sheet includes a plurality of sheets stacked in sequence.

5. The piston valve according to claim 4, characterized in that The first spring sheet includes a plurality of sheets stacked in sequence, and the first spring sheet is stacked between the height sheet and the sealing gasket.

6. The piston valve according to claim 1, characterized in that Also includes: A relief valve plate, stacked between the bottom of the silent chamber and the height plate; The butterfly valve plate is stacked between the overflow valve plate and the height plate.

7. The piston valve according to claim 1, characterized in that Also includes: A guide gasket is assembled on the second end of the piston valve body and avoids the damping channel of the piston valve body.

8. A shock absorber, characterized in that: The connecting rod end of the shock absorber is equipped with a piston valve as described in any one of claims 1-7.

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