Air spring piston, air spring, shock absorber and vehicle

Abstract

The utility model relates to an air spring piston, an air spring, a shock absorber and a vehicle, the air spring piston comprises a piston body, the piston body is provided with a first end and a second end which are opposite, the piston body is provided with a piston cavity penetrating through the second end, and the second end is used for being connected to an air bag so that the piston cavity can communicate with the air bag; the cavity wall of the piston cavity is obliquely arranged relative to the end plate of the first end; the cavity wall of the piston cavity is obliquely arranged, so that the size of the piston cavity is changed, and the air spring piston is simple in structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air spring, in particular to an air spring piston, an air spring, a shock absorber and a vehicle. BACKGROUND

[0002] At present, the air spring is mainly single-cavity structure. In order to make the air spring have a larger stiffness adjustment range, a multi-cavity air spring structure can be used. However, the multi-cavity structure requires good air tightness, and the air spring structure with the multi-cavity structure generally has the problems of complex structure, inconvenient installation and large space occupation.

[0003] In combination with the characteristics of the related art, it is found that the existing air spring piston has the technical problem of complex structure and inconvenient adjustment and installation. CONTENT OF THE INVENTION

[0004] The air spring piston, the air spring, the shock absorber and the vehicle provided by the embodiments of the present application make the air spring piston include a piston cavity with an inclined cavity wall, so as to at least partially solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present application, an air spring piston is provided, comprising:

[0006] a piston body having opposite first and second ends, the piston body being provided with a piston cavity penetrating through the second end, the second end being used for being connected to an air bag so that the piston cavity is communicated with the air bag;

[0007] wherein the cavity wall of the piston cavity is inclined relative to an end plate of the first end.

[0008] Optionally, an included angle between the cavity wall of the piston cavity and the end plate of the first end ranges from an obtuse angle.

[0009] Optionally, the included angle ranges from 92 degrees to 98 degrees.

[0010] Optionally, the cavity wall of the piston cavity is a conical surface.

[0011] Optionally, further comprising a connecting piece, the connecting piece including a side plate connected to the second end and surrounding an axis of the piston cavity; wherein an outer side of the side plate is provided with a threaded structure used for connecting the air bag.

[0012] Optionally, the connecting piece further includes an end plate connected to the side plate, the end plate surrounding the axis of the piston cavity; wherein the end plate is provided with an opening.

[0013] Optionally, the end plate is provided with a plurality of openings, the plurality of openings being uniformly distributed on the end plate and surrounding the axis of the piston cavity.

[0014] Optionally, a piston base is further included, which is installed at the first end and surrounds the axis of the piston cavity, and an outer side of a connection between the piston base and the first end is provided with a texture.

[0015] In order to achieve the above-mentioned purpose, according to the second aspect of the present application, an air spring is provided, which comprises the air spring piston according to any one of the above-mentioned embodiments.

[0016] In order to achieve the above-mentioned purpose, according to the third aspect of the present application, a shock absorber is provided, which comprises the air spring piston according to any one of the above-mentioned embodiments, or the air spring according to the above-mentioned embodiments.

[0017] In order to achieve the above-mentioned purpose, according to the third aspect of the present application, a vehicle is provided, which comprises the air spring piston according to any one of the above-mentioned embodiments, or the shock absorber according to the above-mentioned embodiments.

[0018] In the air spring piston of the embodiments of the present application, the second end of the piston body, which is in communication with the air bag, is provided with a piston cavity, and the cavity wall of the piston cavity is obliquely arranged, so that the volume of the piston cavity is changed, the requirements of the air spring piston are ensured, the overall volume of the air spring piston is reduced, and the air spring piston is simple in structure and convenient to install and adjust.

[0019] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0021] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0022] Figure 1 is a perspective view of the air spring piston from a first perspective in the exemplary embodiments of the present disclosure;

[0023] Figure 2 is a perspective view of the air spring piston from a second perspective in the exemplary embodiments of the present disclosure;

[0024] Figure 3 is a perspective view of the air spring piston from a third perspective in the exemplary embodiments of the present disclosure.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 10, air spring piston; 1, piston body; 2, connecting piece;

[0027] 3, thread; 4, piston base; 5, opening; 6, threaded structure; 7, end plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative effort belong to the protection scope of the present application.

[0029] According to a first aspect of the present application, referring to Figure 1 , Figure 2 , Figure 3 , the air spring piston 10 provided by the present disclosure comprises a piston body 1, the piston body 1 has opposite first and second ends, the piston body 1 is provided with a piston cavity penetrating through the second end, and the second end is used for being connected to an air bag so as to make the piston cavity communicate with the air bag; wherein the cavity wall of the piston cavity is obliquely arranged relative to the end plate 7 of the first end.

[0030] It should be noted that by arranging the piston cavity at the second end of the piston body 1 communicated with the air bag, and by obliquely arranging the cavity wall of the piston cavity, the burst pressure can be further enhanced, so as to enhance the safety performance.

[0031] In the present embodiment, by arranging the piston cavity at the second end of the piston body 1 communicated with the air bag, and by obliquely arranging the cavity wall of the piston cavity, the volume of the piston cavity is changed, the requirements of the air spring piston 10 are ensured, the overall volume of the air spring piston 10 is reduced, the structure of the air spring piston 10 is simple, and the installation and adjustment are facilitated, so as to alleviate the technical problems that the air spring piston 10 in the prior art has a complex structure and is not convenient for adjustment and installation.

[0032] In an embodiment, referring to Figure 1 , the included angle between the cavity wall of the piston cavity and the end plate 7 of the first end is in the range of obtuse angle.

[0033] wherein the angle range of the obtuse angle is 92 degrees to 98 degrees.

[0034] wherein the angle of the obtuse angle can be any one of 92 degrees, 95 degrees and 98 degrees.

[0035] Understandably, when the obtuse angle is less than 92 degrees, the volume change of the piston chamber is not significant, resulting in a poor effect on enhancing the stiffness of the air spring piston 10; when the obtuse angle is greater than 98 degrees, it makes the air spring piston 10 inconvenient to install and adjust.

[0036] In this embodiment, by making the angle between the piston chamber wall and the end plate 7 at the first end obtuse, and further, the obtuse angle range is 92 degrees to 98 degrees, the air spring piston 10 is made easy to install and adjust while ensuring sufficient stiffness.

[0037] In one embodiment, please refer to Figure 1 , Figure 2 The wall of the piston chamber is conical.

[0038] In one embodiment, please refer to Figure 1 It also includes a connector 2, which includes a side plate connected to the second end and surrounding the axis of the piston chamber; wherein the outer side of the side plate is provided with a threaded structure 6 for connecting the airbag.

[0039] The threaded structure 6 includes at least one thread, and the thread extends in the circumferential direction of the side plate.

[0040] The side panels can be cylindrical in shape.

[0041] It is understandable that by forming a threaded structure 6 at the contact point between the air spring piston 10 and the air bladder, the roughness of the contact point between the air spring piston 10 and the air bladder is increased, ensuring the sealing performance of the high-pressure gas inside the air spring piston 10, making the air spring less prone to leakage and with good sealing performance.

[0042] In this embodiment, by forming a threaded structure 6 at the top of the piston core and using the threaded structure 6 to contact the air bladder, the roughness of the piston core at the contact position with the air bladder is increased, thereby enhancing the sealing performance.

[0043] In one embodiment, please refer to Figure 1 The connector 2 also includes an end plate 7 connected to the side plate, the end plate 7 surrounding the axis of the piston chamber; wherein the end plate 7 is provided with an opening 5.

[0044] Among them, the opening 5 reduces the volume utilization rate and saves material usage.

[0045] Among them, opening 5 also enhances the sealing performance.

[0046] In one embodiment, please refer to Figure 1 The end plate 7 is provided with multiple openings 5, which are evenly distributed on the end plate 7 and surround the axis of the piston cavity.

[0047] Among them, the opening 5 is set through the end plate 7.

[0048] The openings 5 ​​are arranged in multiple rings around the axis.

[0049] In this case, the number of openings 5 ​​in any circle is the same.

[0050] It is understandable that the aperture and shape of the opening 5 can be the same. On the one hand, this facilitates the formation of the opening 5. On the other hand, having the same aperture and shape can also make the ability to enhance sealing performance more uniform.

[0051] In one embodiment, please refer to Figure 2 The piston body 1 of the air spring piston 10 has a conical profile.

[0052] In one embodiment, please refer to Figure 2 It also includes a piston base 4, which is mounted on the first end and surrounds the axis of the piston chamber. The outer side of the connection between the piston base 4 and the first end is provided with texture 3.

[0053] In one embodiment, the piston base 4 has welding threads on its inner side.

[0054] In one embodiment, a piston core is also included, which is integrally formed from a piston base 4 and a connector 2.

[0055] The piston body 1 and the piston core can be coaxially arranged.

[0056] The piston body 1 is arranged around the outside of the piston core.

[0057] The sidewall of the piston body 1 is inclined relative to its bottom surface, while the sidewall of the piston core is perpendicular to its bottom surface.

[0058] It is understandable that the sidewall of the piston body 1 is inclined to the sidewall of the piston core, which changes the air volume in the piston chamber of the air spring piston 10, thereby reducing the volume of the piston chamber between the piston body 1 and the piston core, and thus improving the stiffness of the air spring piston 10.

[0059] In this embodiment, the air spring piston 10 includes a piston core and a piston body 1 arranged around the piston core. The piston core and piston body 1 form a piston cavity, and the inner wall of the piston body 1 facing the piston cavity is set to be inclined to the bottom surface to change the volume of the piston cavity, thereby improving the stiffness of the air spring piston 10.

[0060] In one embodiment, the piston body 1 surrounds the circumferential outer side of the piston core to expose the top and bottom ends of the piston core.

[0061] The top end of the piston core part can be the connecting piece 2, and the bottom end of the piston core part can be the piston base 4.

[0062] The piston body 1 includes a first edge towards the connecting piece 2 and a second edge towards the piston base 4 along the axial direction of the air spring piston 10. The piston body 1 and the piston core part are respectively welded and sealed at the first edge and the second edge to form a piston cavity between the piston body 1 and the piston core part.

[0063] It can be understood that the cavity in the air bag which communicates with the piston cavity can be a main cavity, and the piston cavity communicates with the main cavity to serve as a secondary cavity, which enhances the rigidity of the air spring piston 10.

[0064] In the embodiment, the top end and the bottom end of the piston core part are exposed to serve as the connecting piece 2 and the piston base 4 respectively. The piston body 1 and the piston core part are connected at the top end and the bottom end by welding to form a piston cavity between the piston body 1 and the piston core part. The piston cavity serves as a secondary cavity to form a double-cavity air spring piston 10, which enhances the rigidity of the air spring piston 10.

[0065] In an embodiment, as shown in Figure 3 , the piston body 1 and the piston core part are formed with a weld joint at the bottom end. The bottom surface of the piston body 1, the bottom surface of the piston core part and the bottom surface of the weld joint are in the same plane.

[0066] It can be understood that the vehicle body offsets the pressure of the gas pressure in the secondary cavity, while avoiding independent stress on the outer cover surface or the core part. The outer cover surface and the core part are subjected to stress as a whole, and the stress at the weld joint caused by the internal gas pressure is reduced.

[0067] In an embodiment, the cross section of the weld joint is triangular, and two sides of the triangle are respectively attached to the piston core part and the piston body 1.

[0068] In an embodiment, the top end of the air spring piston 10 is connected to the air bag, and the air bag has a main cavity. The main cavity of the air bag communicates with an external gas source through an air passage. The air passage which communicates the main cavity with the external gas source is located on the piston body 1 as a whole.

[0069] The air passage is located on the piston body 1 as a whole, which makes the sealing better.

[0070] In an embodiment, the piston core part and the piston body 1 are made of the same material, and the outer cover surface and the core part are plastic or metal parts.

[0071] In an embodiment, the melted plastic at the weld joint extrudes to form extrudates on the inner and outer sides of the weld joint. The extrudates are solidified to form protrusions on the inner and outer sides of the weld joint. The protrusions can strengthen the welding strength and the sealing performance at the interface between the piston body 1 and the piston core part.

[0072] In one embodiment, the welding connection can employ hot air welding or laser welding.

[0073] To achieve the above object, according to a second aspect of the present application, there is provided an air spring comprising the air spring piston 10 according to any one of the above embodiments.

[0074] To achieve the above object, according to a third aspect of the present application, there is provided a shock absorber comprising the air spring piston 10 according to any one of the above embodiments, or the air spring according to the above embodiments.

[0075] To achieve the above object, according to a third aspect of the present application, there is provided a vehicle comprising the air spring piston 10 according to any one of the above embodiments, or the shock absorber according to the above embodiments.

[0076] The present application provides an air spring piston 10, by setting the side wall of the piston body 1 to be inclined relative to the bottom surface, so that the volume of the piston cavity of the air spring piston 10 is reduced, while ensuring the stiffness of the air spring piston 10, the structure is also simplified, so that the air spring piston 10 is simple in structure, easy to install and adjust.

[0077] In addition, by setting the second end of the piston body 1 communicated with the air bag with the piston cavity, and by setting the cavity wall of the piston cavity to be inclined, the burst pressure can be enhanced, so as to enhance the safety performance.

[0078] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is 2 or more than 2, unless otherwise specifically limited.

[0079] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0080] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0081] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present application, without departing from the technical solution of the present application, still falls within the scope of the technical solution of the present application.

Claims

1. An air spring piston characterized in that, Comprising: a piston body (1) having opposite first and second ends, the piston body being provided with a piston cavity through the second end, the second end being configured to be connected to an air bag so that the piston cavity communicates with the air bag; wherein a cavity wall of the piston cavity is obliquely arranged relative to an end plate of the first end.

2. The air spring piston of claim 1, wherein, An included angle between the cavity wall of the piston cavity and the end plate of the first end ranges from an obtuse angle.

3. The air spring piston of claim 2, wherein, The included angle ranges from 92 degrees to 98 degrees.

4. The air spring piston of claim 2, wherein, The cavity wall of the piston cavity is a conical surface.

5. The air spring piston of any of claims 1 to 4, wherein, Further comprising a connecting member (2) including a side plate connected to the second end and surrounding an axis of the piston cavity, wherein an outer side of the side plate is provided with a threaded structure for connecting the air bag.

6. The air spring piston of claim 5, wherein, The connecting member further includes an end plate connected to the side plate, the end plate surrounding the axis of the piston cavity, wherein the end plate is provided with an opening.

7. The air spring piston of claim 6, wherein, The end plate is provided with a plurality of openings, the plurality of openings being uniformly distributed on the end plate and surrounding the axis of the piston cavity.

8. The air spring piston of claim 7, wherein, Further comprising a piston base (4) mounted to the first end and surrounding the axis of the piston cavity, an outer side of a junction between the piston base (4) and the first end being provided with a texture (3).

9. An air spring characterized by, An air spring piston as claimed in any one of claims 1 to 8.

10. A shock absorber characterized by An air spring as claimed in any one of claims 1 to 8, or an air spring as claimed in claim 9.

11. A vehicle characterized by comprising: A shock absorber as claimed in any one of claims 1 to 8, or a shock absorber as claimed in claim 10.

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