Sealing element for air spring and air spring

Abstract

The utility model provides a sealing element for an air spring and the air spring, the sealing element comprises a body and at least one protruding part, the body is cylindrical and comprises a channel, the body comprises a first end and a second end which are opposite in the axial direction, and the channel extends from the first end to the second end and penetrates through the body; at least one protruding part is located between the first end and the second end, surrounds the body and protrudes out of the outer side face of the body in the radial direction of the body, and the protruding part is connected with the outer side face of the body, so that the sealing element can be connected with a matching element in the air spring in a sealed mode through the protruding part of the sealing element, and the good sealing effect is achieved; and the assembly process can be simplified.

Description

Technical Field

[0001] At least one embodiment of the utility model relates to a sealing element for an air spring and an air spring. Background Art

[0002] With the rapid development of the automobile industry, people have higher and higher requirements for the comfort of automobiles. In the automobile suspension system, air springs can effectively alleviate the vibration of the frame and body and improve the smoothness of the car's driving. During the operation of the air spring, it is very important to control the entry of external impurities into the inner side of the end cap of the air spring through the unsealed path and reduce the risk of operating failures caused by impurities adhering to the valve body assembly. Utility Model Content

[0003] At least one embodiment of the utility model provides a sealing element for an air spring, comprising a body and at least one protrusion, wherein the body is cylindrical and includes a channel, the body includes a first end and a second end opposite to each other in the axial direction, the channel extends from the first end to the second end and penetrates the body; at least one protrusion is located between the first end and the second end, the protrusion surrounds the body and protrudes from the outer side surface of the body in the radial direction of the body, and the protrusion is connected to the outer side surface of the body.

[0004] For example, according to at least one embodiment of the present invention, the sealing element is an integrally formed elastic member.

[0005] For example, according to the sealing element provided by at least one embodiment of the present utility model, the orthographic projection of the protrusion on the plane perpendicular to the axial direction is in the shape of a closed ring.

[0006] For example, according to at least one embodiment of the present invention, the sealing element further includes at least one buffer groove, which is located on the side of the protrusion away from the second end, and the buffer groove is located in the body and has an opening at the first end of the body.

[0007] For example, in the sealing element provided by at least one embodiment of the present invention, the at least one buffer groove includes at least two buffer grooves, and the at least two buffer grooves are spaced apart and distributed in the circumferential direction of the channel.

[0008] For example, according to the sealing element provided by at least one embodiment of the present invention, the sealing element also includes at least one limiting portion, the limiting portion is located between the at least one protrusion and the second end, the limiting portion is connected to the outer side surface of the body, and at least a portion of the limiting portion protrudes beyond the outside of the protrusion in the radial direction of the body.

[0009] For example, according to at least one embodiment of the present invention, the sealing element further includes a limiting ring located inside the body, the limiting ring is located between the at least one protrusion and the second end, and is configured to be connected to the wiring harness.

[0010] For example, according to the sealing element provided by at least one embodiment of the present invention, a first inner groove is provided on the inner side surface of the body, the first inner groove is located between the limiting ring and the protrusion and extends along the circumference of the channel, and the first inner groove is connected to the channel.

[0011] For example, according to the sealing element provided by at least one embodiment of the present invention, a second inner groove is provided on the inner side surface of the limiting ring, the second inner groove extends along the axial direction, and the second inner groove is connected to the first inner groove.

[0012] For example, according to the sealing element provided by at least one embodiment of the present invention, the second inner groove and at least one of the limiting portions are penetrated by a plane perpendicular to the axial direction.

[0013] For example, according to the sealing element provided by at least one embodiment of the present invention, the outer contour of a cross section of at least a portion of the body in the axial direction cut by a plane perpendicular to the axial direction is non-circular.

[0014] At least one embodiment of the utility model also provides an air spring, comprising an airbag, an end cover and the sealing element described in any of the above embodiments, wherein the end cover is located at one end of the airbag and is connected to the airbag; the side wall of the end cover has an installation channel, at least part of the sealing element is located in the installation channel, the air spring also includes a wiring harness and a valve body assembly, the valve body assembly is located on the inner side of the end cover, the wiring harness is connected to the valve body assembly, and extends from the inner side of the end cover through the channel of the sealing element to the outer side of the end cover, and the at least one protrusion of the sealing element is sealingly connected to the inner wall of the installation channel.

[0015] For example, according to the air spring provided by at least one embodiment of the present invention, the mounting channel includes a first sub-mounting channel and a second sub-mounting channel which are connected to each other, the second sub-mounting channel is closer to the outside of the air spring than the first sub-mounting channel, the inner diameter of the second sub-mounting channel is larger than the inner diameter of the first sub-mounting channel to form a step surface at the connection between the first sub-mounting channel and the second sub-mounting channel, the sealing element also includes at least one limiting portion, the limiting portion is located between the at least one protrusion and the second end, the limiting portion is connected to the outer side surface of the body, in the radial direction of the body, at least a portion of the limiting portion protrudes from the outside of the protrusion, the limiting portion is located in the second sub-mounting channel, and the limiting portion abuts against the step surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0017] Figure 1 A schematic structural diagram of a sealing element for an air spring provided in at least one embodiment of the utility model.

[0018] Figure 2 for Figure 1 A schematic cross-sectional view of a sealing element is shown.

[0019] Figure 3 for Figure 1 Left side view of the sealing element shown.

[0020] Figure 4 for Figure 1 A top view of the sealing element is shown.

[0021] Figure 5 A schematic structural diagram of a wiring harness provided for at least one embodiment of the utility model.

[0022] Figure 6 for Figure 5 The wiring harness shown is Figure 1 Schematic diagram of the sealing element after connection is shown.

[0023] Figure 7 A schematic structural diagram of an air spring provided for at least one embodiment of the utility model.

[0024] Figure 8 for Figure 7 Schematic diagram of the structure of the end cover in the air spring shown. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The words "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0027] Generally, an air spring includes an airbag, an end cap, and a valve body assembly located inside the end cap, and the airbag is sealed and connected to the end cap. The air spring may also include a wiring harness connected to the valve body assembly, and the wiring harness extends from the end cap of the air spring to connect to a control element of the vehicle, thereby transmitting a control signal to adjust the working state of the air spring.

[0028] During the research, the inventor of the utility model found that: usually, the end cover of the air spring includes an opening, and the wiring harness connected to the valve body assembly extends to the outside of the end cover through the opening. A sealing element is provided at the opening of the end cover to reduce the entry of external impurities into the inner side of the end cover. The sealing element is mostly a split structure, for example, it may include a main body and at least one sealing ring. When the main body is arranged at the opening of the end cover, the sealing ring is installed between the main body and the end cover. However, the installation steps of this type of sealing element are relatively cumbersome, the installation space of the sealing ring is small, and there is a certain degree of installation difficulty. In addition, the accuracy of the installation position of the sealing element is difficult to ensure, thereby affecting the sealing effect, which may cause external impurities (for example, water, mud, etc.) to enter the inner side of the end cover of the air spring through the opening of the end cover, thereby affecting the operating stability of the valve body assembly.

[0029] At least one embodiment of the utility model provides a sealing element for an air spring, comprising: a body and at least one protrusion, the body is cylindrical and includes a channel, the body includes a first end and a second end opposite to each other in the axial direction, the channel extends from the first end to the second end and penetrates the body; at least one protrusion is located between the first end and the second end, the protrusion surrounds the body and protrudes from the outer side surface of the body in the radial direction of the body, and the protrusion is connected to the outer side surface of the body.

[0030] The sealing element provided by at least one embodiment of the utility model can simplify the structure of the sealing element by providing a protrusion and connecting the protrusion to the outer side of the body while satisfying the requirement of the wire harness and other elements passing through the channel of the body, and can be directly sealed and connected to the mating element (e.g., end cap) of the air spring through the protrusion, thereby facilitating the sealing element to be accurately positioned and tightly fitted with the mating element during assembly, thereby facilitating improving the sealing effect of the sealing element. In addition, the sealing element does not require additional fixing elements or operating steps during assembly, thereby facilitating improving assembly efficiency and accuracy, and further facilitating reducing the risk of affecting the operating stability of the air spring due to the intrusion of external impurities (e.g., water, mud, etc.).

[0031] At least one embodiment of the utility model also provides an air spring, comprising: an airbag, an end cover and a sealing element in any of the above embodiments, wherein the end cover is located at one end of the airbag and connected to the airbag; the side wall of the end cover has an installation channel, at least part of the sealing element is located in the installation channel, the air spring also includes a wiring harness and a valve body assembly, the valve body assembly is located on the inner side of the end cover, the wiring harness is connected to the valve body assembly, and extends from the inner side of the end cover through the channel of the sealing element to the outer side of the end cover, and at least one protrusion of the sealing element is sealingly connected to the inner wall of the installation channel.

[0032] The sealing element for an air spring and the air spring provided in the embodiments of the utility model are described below in conjunction with the accompanying drawings.

[0033] Figure 1 A structural schematic diagram of a sealing element for an air spring provided in at least one embodiment of the utility model; Figure 2 for Figure 1 A schematic cross-sectional view of the sealing element shown; Figure 3 for Figure 1 A left side view of the sealing element is shown; Figure 4 for Figure 1 A top view of the sealing element is shown. For example, Figure 2 The cross-sectional diagram shown can be Figure 4 Schematic diagram of a cross section of the sealing element taken along line AA'.

[0034] like Figure 1 and Figure 2 As shown, the sealing element 100 for the air spring includes a body 110. The body 110 is cylindrical and includes a channel 120 and a first end 101 and a second end 102 opposite to each other in the axial direction X. The channel 120 extends from the first end 101 to the second end 102 and penetrates the body 110. For example, the air spring may include a wire harness, and the channel 120 may be configured so that the wire harness (see the following embodiment for details) Figure 5Description of) passes through, thereby receiving electrical signals from electrical components through the wiring harness.

[0035] like Figure 1 As shown, the sealing element 100 further includes at least one protrusion 130 located between the first end 101 and the second end 102, and the protrusion 130 is connected to the outer side surface 111 of the body 110. The protrusion 130 surrounds the body 110, and the protrusion 130 protrudes from the outer side surface 111 of the body 110 in the radial direction of the body 110. For example, the sealing element 100 can be interference-fitted with a matching element (e.g., an end cap) in the air spring through its protrusion 130, thereby forming an effective sealing interface to have a good sealing connection effect.

[0036] Understandably, Figure 1 The sealing element includes two protrusions as an example for explanation, but the utility model does not limit the number of protrusions. In addition, the shape of the protrusion can be flexibly designed according to the structure of the body, for example, the outer contour of the protrusion can be circular, elliptical or polygonal, and the utility model does not limit this.

[0037] The sealing element provided by at least one embodiment of the utility model can simplify the structure of the sealing element by providing a protrusion and connecting the protrusion to the outer side of the body while satisfying the requirement of the wire harness and other elements passing through the channel of the body, and can be directly sealed and connected to the mating element (e.g., end cap) of the air spring through the protrusion, thereby facilitating the sealing element to be accurately positioned and tightly fitted with the mating element during assembly, thereby facilitating improving the sealing effect of the sealing element. In addition, the sealing element does not require additional fixing elements or operating steps during assembly, thereby facilitating improving assembly efficiency and accuracy, and further facilitating reducing the risk of affecting the operating stability of the air spring due to the intrusion of external impurities (e.g., water, mud, etc.).

[0038] For example, Figure 1 As shown, the protrusion 130 and the body 110 may be an integrally formed structure. For example, the protrusion 130 may be made of the same material and the same process as the body 110. For example, the material of the protrusion 130 and the body 110 may include an elastic material, such as a rubber material.

[0039] With such a configuration, no additional assembly steps are required to connect the protrusion to the body, which helps to ensure the firmness and sealing of the connection between the protrusion and the body.

[0040] For example, Figure 2 and Figure 3As shown, the central straight line passing through the channel 120 along the extension direction of the channel 120 can be the axis of the body 110 (the direction of the axis is the axial direction X, as shown in the figure). The direction of the ray starting from any point of the axis and perpendicular to the axial direction X is the radial direction of the body 110. In some embodiments, for example, the portion of the channel 120 close to the first end 101 can be cylindrical, and the portion of the channel 120 has a central axis W, the extension direction of the central axis W can be the axial direction of the body 110 (that is, the axial direction X), and the radial direction of the cylinder can be the radial direction of the body 110.

[0041] For example, Figure 3 As shown, the inner diameter L1 of the portion of the channel 120 close to the first end 101 may be 6-10 mm, such as 8 mm or 9 mm, which is not limited in the embodiments of the present invention.

[0042] For example, Figure 1 As shown, the orthographic projection of the protrusion 130 on a plane perpendicular to the axial direction X is a closed ring, so that the body 110 can be sealed and connected with the matching element through the protrusion 130 in its circumferential direction, which is conducive to ensuring a good sealing effect.

[0043] For example, Figure 3 and Figure 4 As shown, the sealing element 100 also includes at least one buffer groove 140. The buffer groove 140 is located on the side of the protrusion 130 away from the second end 102 and is located in the body 110. The buffer groove 140 has an opening 141 at the first end 101 of the body 110. For example, when the sealing element 100 is installed, the first end 101 of the body 110 close to the buffer groove 140 first contacts the matching element, and the buffer groove 140 can produce a certain degree of elastic deformation, thereby reducing the installation resistance of the sealing element 100. The provision of the buffer groove 140 can make the sealing element 100 enter the matching element more smoothly, which is conducive to reducing the installation difficulty of the sealing element 100. In addition, the sealing element 100 can be installed in a plurality of matching elements with slight size differences and structural differences, and the above-mentioned size differences and structural differences are compensated by the buffer groove 140, thereby enhancing the adaptability of the sealing element 100 to the matching element. For example, the radial, circumferential and axial dimensions of the buffer groove 140 can be adjusted according to actual conditions. The design principle is to facilitate the deformation of the body during installation, but the installation state cannot be affected by the deformation force of the body being too small.

[0044] For example, Figure 3As shown, the sealing element 100 includes two buffer grooves 140, and the two buffer grooves 140 are spaced apart and distributed in the circumferential direction of the channel 120. The two buffer grooves 140 may be located on opposite sides of the body 110 in the radial direction, so as to enhance the buffering capacity of the sealing element 100 during installation, and the adaptability to the mating elements. For example, the number of buffer grooves 140 of the sealing element 100 may not be limited to two, and may be any suitable number of more than two, and the embodiments of the utility model are not limited to this. In the case where a plurality of buffer grooves 140 are provided in the body of the sealing element, the plurality of buffer grooves 140 may be evenly distributed along the circumference of the body. For example, as Figure 1 As shown, the sealing element 100 further includes at least one stopper 150. The stopper 150 is located between the protruding portion 130 and the second end 102, and is connected to the outer side of the body 110. For example, the stopper 150 and the body 110 may be an integral structure. In the radial direction of the body 110, at least a portion of the stopper 150 protrudes outside the protruding portion 130. For example, Figure 4 As shown, the dimension K1 of the body 110 in the axial direction X can be 22-28 mm, such as 24 mm, 25 mm, 26 mm or 27 mm. For example, in the direction in which the two buffer grooves 140 face each other, the stopper 150 protrudes from the body 110 and also protrudes from the protruding portion 130. For example, in the direction in which the two buffer grooves 140 face each other, the maximum dimension K2 of the portion of the body 110 located near the first end 101 of the protruding portion 130 can be 18.0-24.0 mm, such as 18.5 mm, 19.0 mm, 19.5 mm or 20.0 mm.

[0045] With such arrangement, when the sealing element is installed, the limiting portion can contact and abut against the structure in the matching element, thereby enabling the sealing element to be correctly positioned and fixed at a predetermined position, and the limiting portion is also beneficial for reducing the risk of misalignment of the sealing element after installation.

[0046] For example, Figure 1 and Figure 2 As shown, the outer contour of the cross section of at least a portion of the outer side surface 111 of the body 110 in the axial direction X cut by a plane perpendicular to the axial direction X is non-circular. Figure 2 As shown, at least a portion of the outer side surface 111 of the body 110 may be the outer side surface of the portion of the body located in the M region, but is not limited thereto. For example, the outer contour of the cross section may be an ellipse or a rectangle, which is not limited in the embodiments of the present invention.

[0047] With such arrangement, when the sealing element is installed in the matching element, the risk of the sealing element rotating relative to the matching element can be reduced, thereby facilitating enhancing the installation stability of the sealing element.

[0048] For example, Figure 3 As shown, the body 110 includes a protruding structure 170, and a portion of the surface of the protruding structure 170 away from the channel 120 is flat, so that the installation stability of the sealing element 100 can be enhanced. Figure 3 As shown, in the direction in which the two buffer grooves 140 face each other, the size L2 of the protruding structure 170 can be 10-15 mm, such as 12 mm, 13 mm or 14 mm, and the embodiment of the utility model is not limited to this. For example, in the direction perpendicular to the above-mentioned flat surface of the protruding structure 170, the size L3 of the buffer groove 140 can be 5.5-6.5 mm, such as 6 mm, but not limited thereto, so that appropriate elastic deformation can be generated to enhance the buffering capacity of the sealing element 100 during installation.

[0049] Figure 5 A schematic diagram of the structure of a wiring harness provided for at least one embodiment of the utility model; Figure 6 for Figure 5 The wiring harness shown is Figure 1 Schematic diagram of the sealing element after connection is shown.

[0050] For example, Figure 1 and Figure 5 As shown, the sealing element 100 further includes a stop ring 160 located inside the body 110, the stop ring 160 is located between the protrusion 130 and the second end 102, and is configured to be connected to the wire harness 200 of the air spring. For example, the stop ring 160 and the body 110 may be an integrated structure, and the wire harness 200 may be fixedly connected to the body through the stop ring 160 to reduce the risk of loosening, dislocation, etc. of the wire harness 200 (for example, when subjected to vibration or impact), thereby ensuring the stability of electrical signal transmission.

[0051] For example, Figure 2 and Figure 5 As shown, a first inner groove 115 is disposed on the inner side of the body 110 . The first inner groove 115 extends along the circumference of the channel 120 , and is located between the stop ring 160 and the protrusion 130 , and the first inner groove 115 is in communication with the channel 120 .

[0052] For example, Figure 2 , Figure 5 as well as Figure 6 The wiring harness 200 may include a first positioning portion 210, which can enter the channel 120 from the second end 102 of the body 110 and then reach the first inner groove 115, thereby achieving fixation with the body 110 and helping to reduce the risk of loosening or misalignment of the wiring harness 200.

[0053] For example, Figure 2 , Figure 5as well as Figure 6 , a limiting inner groove 125 may also be provided on the inner side of the body 110, the limiting inner groove 125 extends along the circumference of the channel 120, and is located on a side of the first inner groove 115 close to the second end 102, and the limiting inner groove 125 is connected to the channel 120. For example, the wire harness 200 may include a second positioning portion 220, and the second positioning portion 220 may be located in the limiting inner groove 125, thereby further reducing the risk of loosening or misalignment of the wire harness 200.

[0054] For example, Figure 2 , Figure 5 and Figure 6 As shown, in the radial direction of the body 110, the maximum size of the first inner groove 115 may be different from the maximum size of the limiting inner groove 125. For example, in the radial direction of the body 110, the maximum size of the first inner groove 115 may be flexibly adjusted according to the size of the first positioning portion 210, and the maximum size of the limiting inner groove 125 may be flexibly adjusted according to the size of the second positioning portion 220, and the embodiments of the present utility model are not limited to this.

[0055] For example, Figure 1 and Figure 2 As shown, a second inner groove 165 is provided on the inner side of the stop ring 160. The second inner groove 165 extends along the axial direction X, and the second inner groove 165 is communicated with the first inner groove 115. For example, both the first inner groove 115 and the second inner groove 165 are communicated with the channel 120. For example, in the axial direction X, the size of the second inner groove 165 can be the same as the size of the stop ring 160.

[0056] With such a configuration, on the one hand, when the wire harness enters the channel from the second end of the body, the stop ring can provide expansion space through the second inner groove to reduce the extrusion between the wire harness and the stop ring, so that part of the structure of the wire harness (for example, the first positioning part) can pass through the stop ring smoothly, which is conducive to simplifying the installation process of the wire harness and extending the service life of the wire harness. On the other hand, when installing the sealing element, the second inner groove allows the sealing element to be compressed according to the size of the matching element, thereby facilitating the sealing element to enter the matching element and facilitating installation.

[0057] For example, Figure 1 As shown, the second inner groove 165 and at least one limiting portion 150 are passed through by a plane perpendicular to the axial direction X. For example, the wall thickness of the portion of the sealing element 100 corresponding to the limiting portion 150 is relatively large. With such a configuration, during installation, the portion of the sealing element 100 corresponding to the limiting portion 150 can be easily compressed toward the channel 120, thereby facilitating the entry of the portion of the sealing element 100 into the mating element for easy installation.

[0058] For example, Figure 1As shown, the sealing element 100 may be an integrally formed elastic member. The sealing element 100 may be made of an elastic material such as rubber.

[0059] At least one embodiment of the utility model further provides an air spring.

[0060] Figure 7 A schematic diagram of the structure of an air spring provided in one embodiment of the utility model; Figure 8 for Figure 7 A schematic structural diagram of the end cover in the air spring is shown.

[0061] like Figure 7 and Figure 8 As shown, the air spring 1000 includes an airbag 1010, an end cap 1020, and a sealing element 100 described in any of the above embodiments. The end cap 1020 is located at one end of the airbag 1010 and is connected to the airbag 1010. The air spring 1000 also includes a valve body assembly (not shown in the figure), and the valve body assembly is located inside the end cap 1020. For example, the valve body assembly can be used to control the flow state of the gas, and then control the air pressure of the air spring 1000. The embodiments of the utility model do not limit the specific structural form of the valve body assembly.

[0062] like Figure 1 , Figure 7 and 8 As shown, the side wall of the end cover 1020 has a mounting channel 1021, at least part of the sealing element 100 is located in the mounting channel 1021, and at least one protrusion 130 of the sealing element 100 is sealed and connected to the inner wall of the mounting channel 1021. For example, the first end 101 of the sealing element 100 is completely located in the mounting channel 1021, and the second end 102 of the sealing element 100 is closer to the outside of the end cover 1020 than the first end 101. The sealing element 100 can be tightly fitted with the inner wall of the mounting channel 1021 through its protrusion 130, thereby achieving a good sealing effect.

[0063] like Figure 1 , Figure 7 and 8 As shown, the air spring 1000 further includes a wire harness 200, and the wire harness 200 is connected to the valve body assembly. The wire harness 200 extends from the inner side of the end cover 1020 through the channel 120 of the sealing element 100 to the outer side of the end cover 1020. The matching relationship between the wire harness 200 and the sealing element 100 can be referred to the relevant description in the above embodiment, and will not be repeated here.

[0064] In the air spring provided by at least one embodiment of the utility model, the installation channel of the end cover is arranged on its side wall, so that the sealing element can enter the installation channel from the side of the end cover and then be connected with the installation channel, thereby simplifying the installation process of the sealing element and facilitating a good sealing effect between the sealing element and the installation channel. In addition, since the air spring includes the sealing element described in any of the above embodiments, the technical effect of the above sealing element can also be reflected in the air spring, which will not be repeated here.

[0065] For example, Figure 7 and Figure 8 As shown, the mounting channel 1021 of the end cover 1020 includes a first sub-mounting channel 1001 and a second sub-mounting channel 1002 that are connected to each other, and the second sub-mounting channel 1002 is closer to the outside of the air spring 1000 than the first sub-mounting channel 1001. For example, the first sub-mounting channel 1001 and the second sub-mounting channel 1002 are respectively matched and connected with different parts of the sealing element 100. For example, the inner diameter of the second sub-mounting channel 1002 is larger than the inner diameter of the first sub-mounting channel 1001 to form a step surface 1003 at the connection between the first sub-mounting channel 1001 and the second sub-mounting channel 1002.

[0066] For example, Figure 1 As shown, the sealing element 100 further includes at least one limiting portion 150. The limiting portion 150 is located between the protruding portion 130 and the second end 102, and is connected to the outer side of the body 110. For example, the limiting portion 150 and the body 110 can be an integrated structure. In the radial direction of the body 110, at least a portion of the limiting portion 150 protrudes outside the protruding portion 130.

[0067] For example, Figure 1 , Figure 7 and Figure 8 As shown, when the sealing element 100 is connected to the cover 1020, the limiting portion 150 of the sealing element 100 is located in the second sub-mounting channel 1002, and the portion of the limiting portion 150 away from the second end 102 (for example, the protruding portion 130) is located in the first sub-mounting channel 1001, and the limiting portion 150 abuts against the step surface 1003, so that the sealing element 100 can be correctly aligned and fixed at a predetermined position of the mounting channel 1021, which is conducive to reducing the risk of misalignment of the sealing element 100 after installation. For other structural features of the sealing element 100, please refer to the relevant description of the above embodiment, which will not be repeated here.

[0068] There are a few points to note:

[0069] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention, and other structures may refer to the conventional designs.

[0070] (2) In the absence of conflict, features in the same embodiment or in different embodiments of the present invention may be combined with each other.

[0071] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A sealing element for an air spring, characterized in that: include: A body, the body is cylindrical and includes a passage, the body includes a first end and a second end opposite to each other in the axial direction, the passage extends from the first end to the second end and penetrates the body; At least one protrusion is located between the first end and the second end, the protrusion surrounds the body and protrudes from the outer side surface of the body in the radial direction of the body, and the protrusion is connected to the outer side surface of the body.

2. The sealing element according to claim 1, characterized in that The sealing element is an integrally formed elastic member.

3. The sealing element according to claim 1, characterized in that The orthographic projection of the protrusion on a plane perpendicular to the axial direction is in the shape of a closed ring.

4. The sealing element according to claim 1, characterized in that The sealing element further includes at least one buffer groove, the buffer groove is located on a side of the protrusion away from the second end, the buffer groove is located in the body and has an opening at the first end of the body.

5. The sealing element according to claim 4, characterized in that The at least one buffer groove includes at least two buffer grooves, and the at least two buffer grooves are spaced apart and distributed in a circumferential direction of the channel.

6. The sealing element according to claim 1, characterized in that The sealing element further comprises at least one limiting portion, the limiting portion being located between the at least one protrusion and the second end, the limiting portion being connected to the outer side surface of the body, and at least a portion of the limiting portion protruding outwardly of the protrusion in the radial direction of the body.

7. The sealing element according to claim 6, characterized in that The sealing element further includes a limiting ring located inside the body, the limiting ring being located between the at least one protrusion and the second end and being configured to be connected to a wiring harness.

8. The sealing element according to claim 7, characterized in that A first inner groove is arranged on the inner side surface of the body, the first inner groove is located between the limiting ring and the protruding portion and extends along the circumference of the channel, and the first inner groove is communicated with the channel.

9. The sealing element according to claim 8, characterized in that A second inner groove is provided on the inner side surface of the limiting ring. The second inner groove extends along the axial direction and is communicated with the first inner groove.

10. The sealing element according to claim 9, characterized in that The second inner groove and at least one of the limiting portions are penetrated by a plane perpendicular to the axial direction.

11. The sealing element according to any one of claims 1 to 10, characterized in that: An outer contour of a cross section of at least a portion of the body in the axial direction cut by a plane perpendicular to the axial direction is non-circular.

12. An air spring, characterized in that: include: Airbags; an end cap, located at one end of the airbag and connected to the airbag; as well as The sealing element according to any one of claims 1 to 5; Wherein, the side wall of the end cover has an installation channel, at least a part of the sealing element is located in the installation channel, the air spring also includes a wiring harness and a valve body assembly, the valve body assembly is located on the inner side of the end cover, the wiring harness is connected to the valve body assembly, and extends from the inner side of the end cover through the channel of the sealing element to the outer side of the end cover, and the at least one protrusion of the sealing element is sealed and connected to the inner wall of the installation channel.

13. The air spring according to claim 12, characterized in that The mounting channel includes a first sub-mounting channel and a second sub-mounting channel that are connected to each other, the second sub-mounting channel is closer to the outside of the air spring than the first sub-mounting channel, and the inner diameter of the second sub-mounting channel is larger than the inner diameter of the first sub-mounting channel to form a step surface at the connection between the first sub-mounting channel and the second sub-mounting channel, The sealing element further comprises at least one limiting portion, the limiting portion being located between the at least one protruding portion and the second end, the limiting portion being connected to the outer side surface of the body, and at least a portion of the limiting portion protruding outwardly of the protruding portion in the radial direction of the body. Wherein, the limiting portion is located in the second sub-mounting channel, and the limiting portion abuts against the step surface.

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