Noise reduction mechanism, air spring assembly with noise reduction mechanism and vehicle

Abstract

The invention relates to the field of air spring assemblies, in particular to a noise reduction mechanism, an air spring assembly with the noise reduction mechanism and a vehicle, the noise reduction mechanism comprises a noise reduction seat, and the noise reduction seat comprises a noise reduction upper seat and a noise reduction lower seat; the noise reduction upper seat is connected to a piston of the air spring; the noise reduction lower seat is connected to the shock absorber tray; the noise reduction upper seat and the noise reduction lower seat are oppositely arranged and can rotate relatively; according to the noise reduction mechanism, friction noise of the piston at the lower end of the air spring and the shock absorber tray can be blocked, meanwhile, the production process is simple, and the production cost is relatively low; meanwhile, the invention discloses a noise reduction mechanism. Rotational freedom can be fully released, the degree of absorbing rotational motion by bag skin deformation is fully reduced, and the service life of the bag skin is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of air spring assemblies, in particular to a noise reduction mechanism and an air spring assembly and a vehicle having the noise reduction mechanism. Background Art

[0002] Currently, more and more passenger cars are equipped with air springs. The piston at the lower end of the air spring is connected to the shock absorber tray, and the upper end is connected to the car body. The vehicle's stabilizer bar is generally connected to the shock absorber. When the left and right wheels bounce in opposite directions, the stabilizer bar is subjected to force, which will apply a certain torque to the shock absorber. At this time, the shock absorber will undergo a certain twisting, and the connection between the lower end of the air spring and the shock absorber will undergo relative twisting, causing friction noise.

[0003] At the same time, when the wheels bounce up and down and turn, the shock absorber will also produce a certain amount of twisting, which makes it easier to generate noise.

[0004] In the prior art, in order to ensure a certain strength, the lower end of the air spring is made of metal material, and the shock absorber tray that cooperates with the air spring is also made of metal material. The relative friction between the two metals causes the greatest noise.

[0005] In the prior art, another solution is to fix the piston at the lower end of the air spring and the shock absorber tray together in the circumferential direction, that is, to force the piston and the shock absorber tray not to rotate relative to each other.

[0006] This solution completely relies on the air spring bladder to bear the relative rotation between the shock absorber and the air spring, which will significantly reduce the life of the bladder.

[0007] The existing patent 202320137204.4 - Air spring assembly and vehicle having the same does not clearly disclose technical inspiration for solving the above technical problems.

[0008] Therefore, in order to improve the above, it is necessary to optimize the design of the existing air spring assembly. Summary of the Invention

[0009] The purpose of the present invention is to overcome the deficiencies in the prior art and provide.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is:

[0011] A noise reduction mechanism for an air spring includes a noise reduction seat, which includes a noise reduction upper seat and a noise reduction lower seat; the noise reduction upper seat is connected to the piston of the air spring; the noise reduction lower seat is connected to the shock absorber tray; the noise reduction upper seat and the noise reduction lower seat are arranged opposite to each other and can rotate relative to each other.

[0012] The noise reduction lower seat and the noise reduction upper seat are both made of plastic.

[0013] The noise reduction upper seat is connected to the piston through a clamping portion, and the clamping portion includes a piston groove provided on the piston and an upper seat boss provided on the noise reduction upper seat; the upper seat boss on the noise reduction upper seat is clamped with the piston groove.

[0014] The noise reduction lower seat is connected to the shock absorber tray through a plug-in portion; the plug-in portion includes a plug-in column arranged on the noise reduction lower seat and a positioning hole arranged on the shock absorber tray; the plug-in column on the noise reduction lower seat is plugged into the positioning hole on the shock absorber tray.

[0015] The noise reduction upper seat includes an upper seat body, and an upper sleeve through hole is provided on the upper seat body; the noise reduction lower seat includes a lower seat body; the lower seat body is provided with a lower sleeve through hole; the lower seat body and the upper seat body are surface-fitted.

[0016] An upper friction plane is provided on one end of the upper seat body close to the lower seat body; a lower friction plane is provided on one end of the lower seat body close to the upper seat body; and Teflon layers are provided on the upper friction plane and the lower friction plane.

[0017] The lower seat body includes a lower seat top plate; a lower seat ring plate is provided around the lower seat top plate; the lower seat top plate and the lower seat ring plate form a sleeve-connecting groove.

[0018] A connecting ring plate is provided at one end of the lower seat ring plate away from the lower seat top plate; the connecting ring plate extends along a side away from the central axis of the lower seat ring plate.

[0019] An air spring assembly includes a piston and a shock absorber tray; the piston is connected to the shock absorber tray through the noise reduction mechanism; the noise reduction lower seat is connected to the shock absorber tray; the noise reduction upper seat is connected to the piston of the air spring; the noise reduction upper seat and the noise reduction lower seat are stacked.

[0020] A vehicle includes a suspension system, wherein the suspension system includes the air spring assembly.

[0021] The advantages of the present invention are:

[0022] The invention discloses a noise reduction mechanism, an air spring assembly and a vehicle having the noise reduction mechanism.

[0023] The noise reduction mechanism disclosed in the present invention can block the friction noise between the piston at the lower end of the air spring and the shock absorber tray, and at the same time, the production process is simple and the production cost is relatively low.

[0024] At the same time, the noise reduction mechanism disclosed in the present invention can fully release the rotational freedom, fully reduce the degree of deformation of the bladder skin to absorb the rotational motion, and increase the life of the bladder skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following is a brief description of the contents and symbols in the drawings of the present invention:

[0026] Figure 1 It is a cross-sectional view of the air spring and shock absorber;

[0027] Figure 2 This is a partial view of the connection between the lower piston of the air spring and the shock absorber;

[0028] Figure 3 This is the explosion diagram of the connection position-1;

[0029] Figure 4 Connection location explosion diagram-2

[0030] The marks in the above figure are:

[0031] 1. Air spring body; 11. Upper end of air spring; 12. Bladder skin; 13. Piston; 131. Piston groove; 132. Piston lower plane; 14. Noise reduction upper seat; 141. Noise reduction upper seat boss; 142. Upper friction plane; 143. Noise reduction upper seat upper plane; 15. Noise reduction lower seat; 151. Lower seat boss; 152. Lower friction plane; 153. Noise reduction lower seat lower plane; 2. Shock absorber assembly; 21. Shock absorber tray; 211. Tray locating hole; 212. Shock absorber tray upper plane. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention will be further explained in detail below by describing the best embodiment with reference to the accompanying drawings.

[0033] A noise reduction mechanism for an air spring includes a noise reduction seat, the noise reduction seat including a noise reduction upper seat 14 and a noise reduction lower seat 15; the noise reduction upper seat 14 is connected to the piston 13 of the air spring; the noise reduction lower seat 15 is connected to the shock absorber tray 21; the noise reduction upper seat 14 and the noise reduction lower seat 15 are arranged opposite to each other and can rotate relative to each other; the noise reduction mechanism disclosed in the present invention can block the friction noise between the piston 13 at the lower end of the air spring and the shock absorber tray 21, and at the same time, the production process is simple and the production cost is relatively low; at the same time, the noise reduction mechanism disclosed in the present invention can fully release the rotational freedom, fully reduce the degree of deformation and absorption of rotational motion of the bladder skin 12, and increase the service life of the bladder skin 12.

[0034] The noise reduction mechanism disclosed in the present invention is mainly used on the air spring assembly, mainly used for the connection between the lower piston 13 of the air spring and the shock absorber tray 21. The noise reduction mechanism disclosed in the present invention is used in conjunction with the noise reduction upper seat 14 and the noise reduction lower seat 15; it can avoid the problem of direct friction between the traditional piston 13 and the shock absorber, which is prone to noise and damage.

[0035] Specifically, the noise reduction mechanism disclosed in the present invention mainly includes a noise reduction seat, which is used to connect the piston 13 and the shock absorber tray 21. In actual arrangement, it is also arranged in the area between the piston 13 and the shock absorber tray 21; at the same time, the noise reduction seat includes a noise reduction upper seat 14 and a noise reduction lower seat 15; the noise reduction upper seat 14 is connected to the piston 13 of the air spring; the noise reduction lower seat 15 is connected to the shock absorber tray 21; the noise reduction upper seat 14 and the noise reduction lower seat 15 are arranged relative to each other and can rotate relative to each other; based on such a setting, the noise reduction upper seat 14 and the noise reduction lower seat 15 can avoid the existence of the noise reduction seat affecting the relative rotation of the piston 13 and the shock absorber tray 21 while realizing the relative arrangement and connection between the piston 13 and the shock absorber tray 21.

[0036] At the same time, in actual arrangement, in the present invention, the noise reduction upper seat 14 is connected to the piston 13 of the air spring; the noise reduction lower seat 15 is connected to the shock absorber tray 21; specifically, in actual connection, the piston 13 and the noise reduction upper seat 14 are fixed together in the circumferential direction, and the connection method can be snap connection, interference fit, one-piece injection molding, etc.; the shock absorber tray 21 is connected to the noise reduction lower seat 15, and the connection method fixes the shock absorber tray 21 and the noise reduction lower seat 15 together in the circumferential direction, and the connection method can be snap connection, interference fit, etc.

[0037] Furthermore, in the present invention, the noise reduction lower seat 15 and the noise reduction upper seat 14 are both made of plastic; here, the noise reduction upper seat 14 and the noise reduction lower seat 15 preferably use materials with low friction coefficient, such as polyformaldehyde, materials with self-lubricating function, etc.

[0038] Furthermore, in the present invention, the noise reduction upper seat 14 is connected to the piston 13 through a clamping portion. The setting of the clamping portion ensures the stability of the connection between the noise reduction upper seat 14 and the piston 13, and at the same time, the noise reduction upper seat 14 and the piston 13 have the ability to limit rotation, which can ensure the linkage of the movement of the noise reduction upper seat 14 and the piston 13, and facilitate the arrangement of the noise reduction upper seat 14. At the same time, the clamping portion in the present invention includes a piston groove 13 set on the piston 13 and an upper seat boss 141 set on the noise reduction upper seat 14; the upper seat boss 141 on the noise reduction upper seat 14 is clamped with the piston groove 13; during the specific connection, the noise reduction upper seat 14 is clamped in the piston groove 13 through the upper seat boss 141. Based on such a setting, the accuracy and stability of the relative position of the noise reduction upper seat 14 and the piston 13 are achieved.

[0039] Furthermore, the noise reduction lower seat 15 in the present invention is connected to the shock absorber tray 21 through a plug-in part; the setting of the plug-in part also plays a good limiting role, ensuring the stability of the connection between the noise reduction lower seat 15 and the shock absorber tray 21, and at the same time enabling the noise reduction lower seat 15 and the shock absorber tray 21 to have rotation limiting capabilities, which can ensure the linkage of the movement of the noise reduction lower seat 15 and the shock absorber tray 21, and facilitate the installation and arrangement of the noise reduction lower seat 15; specifically, the plug-in part in the present invention includes a plug-in column 151 provided on the noise reduction lower seat 15 and a positioning hole 211 provided on the shock absorber tray 21; the plug-in column 151 on the noise reduction lower seat 15 is plugged into the positioning hole 211 on the shock absorber tray 21; the plug-in column 151 plays a good rotation limiting role, which facilitates the linkage and stability of the movement of the noise reduction lower seat 15 and the shock absorber tray 21.

[0040] Furthermore, in the present invention, the noise reduction upper seat 14 includes an upper seat body, and the upper seat body is provided with an upper sleeve through hole; the noise reduction lower seat 15 includes a lower seat body; the lower seat body is provided with a lower sleeve through hole; through the setting of the upper sleeve through hole and the lower sleeve through hole, the subsequent installation and sleeve connection of the noise reduction upper seat 14 and the noise reduction lower seat 15 is facilitated, avoiding installation interference during installation.

[0041] At the same time, in the present invention, the lower seat body and the upper seat body are surface-fitted; based on the surface-to-surface fitting, the contact area between the noise reduction upper seat 14 and the noise reduction lower seat 15 is guaranteed, and the stability of the connection between the piston 13 and the shock absorber tray 21 is guaranteed; at the same time, it can also ensure the stability of the subsequent use of the air spring assembly to a certain extent.

[0042] Furthermore, in the present invention, an upper friction plane 142 is provided at one end of the upper seat body near the lower seat body; a lower friction plane 152 is provided at one end of the lower seat body near the upper seat body; a Teflon layer is provided on the upper friction plane 142 and the lower friction plane 152; the present invention can further reduce the friction between the noise reduction upper seat 14 and the noise reduction lower seat 15 through the provision of the Teflon layer, while ensuring smooth rotation, and can better reduce friction resistance and reduce noise during use of the air spring assembly.

[0043] Furthermore, in the present invention, the lower seat body includes a lower seat top plate 15-1; a lower seat ring plate 15-2 is provided around the lower seat top plate 15-1; the lower seat top plate 15-1 and the lower seat ring plate 15-2 form a socket groove; the lower seat body of the present invention includes the lower seat ring plate 15-2 and the lower seat top plate 15-1, so that the lower seat body forms a box structure with an opening at the lower end, which facilitates the socket installation of the lower seat body on the shock absorber tray 21 in subsequent use, and has good lateral limiting ability through the shock absorber tray 21 and the lower seat ring plate 15-2, thereby preventing the lower seat ring plate 15-2 from laterally detaching from the shock absorber tray 21.

[0044] At the same time, in the present invention, the lower seat ring plate 15-2 is provided with a connecting ring plate 15-3 at one end away from the lower seat top plate 15-1; the connecting ring plate 15-3 extends along the side away from the central axis of the lower seat ring plate 15-2; based on this arrangement, a raised ring rib structure is formed at the lower end of the lower seat body, which facilitates the installation limit between the bladder skin 12 during subsequent assembly.

[0045] An air spring assembly includes a piston 13 and a shock absorber tray 21; the piston 13 is connected to the shock absorber tray 21 through the noise reduction mechanism; the noise reduction lower seat 15 is connected to the shock absorber tray 21; the noise reduction upper seat 14 is connected to the piston 13 of the air spring; the noise reduction upper seat 14 and the noise reduction lower seat 15 are stacked; at the same time, the air spring assembly also includes a bladder skin 12, the bladder skin 12 is sleeved on the noise reduction seat, and the lower end of the bladder skin 12 is connected to the connecting ring plate 15-3 on the noise reduction lower seat 15. When specifically connected, the bladder skin 12 is clamped on the connecting ring plate 15-3 through the inner wall groove. The connecting ring plate 15-3 can provide a longitudinal supporting force and a lateral limiting force for the bladder skin 12. While enabling the relative rotation of the bladder skin 12 and the noise reduction lower seat 15, the position of the lower end of the bladder skin 12 can also be limited.

[0046] A vehicle includes a suspension system, wherein the suspension system includes the air spring assembly.

[0047] specific:

[0048] The air spring assembly disclosed in the present invention has an upper end connected to the vehicle body, a lower end piston 13 connected to the shock absorber tray 21, and a noise reduction seat is arranged between the lower end piston 13 and the shock absorber tray 21. The noise reduction seat includes a noise reduction upper seat 14 and a noise reduction lower seat 15. The noise reduction upper seat 14 is a plastic upper seat, and the noise reduction lower seat 15 is a plastic lower seat. During actual connection, the piston 13 is connected to the noise reduction upper seat 14, and this connection method fixes the piston 13 and the noise reduction upper seat 14 together in the circumferential direction. The connection method can be a snap connection, interference fit, one-piece injection molding, etc. The shock absorber tray 21 is connected to the noise reduction lower seat 15, and this connection method fixes the shock absorber tray 21 and the noise reduction lower seat 15 together in the circumferential direction. The connection method can be a snap connection, interference fit, etc.

[0049] Meanwhile, in the present invention, the noise reduction upper seat 14 and the noise reduction lower seat 15 adopt planar contact.

[0050] The noise reduction upper seat 14 or the noise reduction lower seat 15 may have a layer of low friction coefficient material added in the plane contact area, such material may be Teflon or the like;

[0051] The noise reduction upper seat 14 and the noise reduction lower seat 15 are preferably made of a material with a low friction coefficient, such as polyformaldehyde, a material with a self-lubricating function, etc.

[0052] A suspension system comprises the above-mentioned air spring assembly and a stabilizer bar connected to a shock absorber via a stabilizer bar connecting rod.

[0053] A vehicle has the above suspension system, and its wheels can jump up and down and turn.

[0054] The present invention uses the noise reduction upper seat 14 and the noise reduction lower seat 15 in combination, and changes the original relative rotation between metal and metal, or between metal and plastic, into relative rotation between plastic and plastic, which can greatly reduce noise. By giving priority to using materials with a low friction coefficient, the noise reduction upper seat 14 and the noise reduction lower seat 15 can be regarded as a plane sliding bearing, which further reduces or even eliminates noise.

[0055] At the same time, the rotational freedom is fully released, the degree of deformation of the capsule skin 12 to absorb the rotational movement is fully reduced, and the service life of the capsule skin 12 is increased.

[0056] Furthermore, by adding a Teflon coating made of a low friction coefficient material between the noise reduction upper seat 14 or the noise reduction lower seat 15, the effect of eliminating noise and increasing the life of the bladder skin 12 is further enhanced.

[0057] At the same time, the structure and process are simple and the cost is low.

[0058] A noise reduction upper seat 14 and a noise reduction lower seat 15 are added between the lower end piston 13 of the air spring and the shock absorber tray 21. The noise reduction upper seat 14 is fixed to the lower end piston 13 of the air spring in the circumferential direction, and the noise reduction lower seat 15 is fixed to the shock absorber tray 21 in the circumferential direction; when the air spring and the shock absorber rotate relative to each other, the relative rotational friction between the plastic upper and lower seats reduces or eliminates noise and improves the service life of the bladder skin 12.

[0059] Specific as Figure 1 The figure shows a cross-sectional view of the air spring and shock absorber of the present invention, which at least includes: an air spring assembly and a shock absorber assembly.

[0060] The air spring assembly comprises an air spring body 1, which includes an air spring upper end 11, a bladder skin 12, a piston 13, and a noise reduction upper seat 14 and a noise reduction lower seat 15 located between the air spring lower end piston and the shock absorber tray 21.

[0061] The shock absorber tray 21 is located on the shock absorber assembly.

[0062] The upper end of the air spring is connected to the vehicle body.

[0063] like Figure 2The figure shows a partial view. Looking in the axial direction, the top is the air spring lower end piston 13, the bottom is the noise reduction upper seat 14, the bottom is the noise reduction lower seat 15, and the bottom is the shock absorber tray 21. During normal use, the air spring is inflated and the air spring lower end piston 13 is pressed against the shock absorber tray 21.

[0064] Figure 3 、 Figure 4 This is a schematic diagram of a partial explosion of the connecting structure. The piston 13 at the lower end of the air spring includes a piston groove 13 and a piston lower plane 132; the noise reduction upper seat 14 includes an upper seat boss 141, an upper plane 143 of the noise reduction upper seat, and an upper friction plane 142; the piston groove 13 cooperates with the boss of the noise reduction upper seat 14 to fix the piston 13 and the noise reduction upper seat 14 in the circumferential direction, and the lower plane of the piston contacts the upper plane of the noise reduction upper seat and is naturally pressed.

[0065] The noise reduction lower seat 15 includes a plug-in column 151, a lower friction plane 152, and a lower plane 153 of the noise reduction lower seat; the lower friction plane contacts the upper friction plane, is naturally pressed, and can rotate relative to each other.

[0066] The shock absorber tray 21 includes a positioning hole 211 and an upper plane 212 of the shock absorber tray 21 .

[0067] The positioning hole 211 cooperates with the plug-in column 151 to fix the noise reduction lower seat 15 and the shock absorber tray 21 in the circumferential direction. The lower plane of the noise reduction lower seat 15 contacts the upper plane of the shock absorber tray 21 and is naturally pressed.

[0068] Furthermore, the noise reduction upper seat 14 and the noise reduction lower seat 15 can be made of materials with a low friction coefficient, such as polyformaldehyde or a material with self-lubricating function. The friction surface of the noise reduction upper seat 14 and the friction surface of the noise reduction lower seat 15 are easier to rotate relative to each other, thereby further reducing the risk of noise and improving the life of the bag skin 12.

[0069] Furthermore, the friction surface of the noise reduction upper seat 14 or the friction surface of the noise reduction lower seat 15 can be coated with a low friction coefficient material, such as Teflon.

[0070] Thereby, the noise can be further eliminated and the service life of the capsule skin 12 can be increased.

[0071] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A noise reduction mechanism for an air spring, characterized in that: It includes a noise reduction seat, which includes a noise reduction upper seat and a noise reduction lower seat; the noise reduction upper seat is connected to the piston of the air spring; the noise reduction lower seat is connected to the shock absorber tray; the noise reduction upper seat and the noise reduction lower seat are arranged opposite to each other and can rotate relative to each other.

2. The noise reduction mechanism for an air spring according to claim 1, characterized in that: The noise reduction lower seat and the noise reduction upper seat are both made of plastic.

3. The noise reduction mechanism for an air spring according to claim 1, characterized in that: The noise reduction upper seat is connected to the piston through a clamping portion, and the clamping portion includes a piston groove provided on the piston and an upper seat boss provided on the noise reduction upper seat; the upper seat boss on the noise reduction upper seat is clamped with the piston groove.

4. The noise reduction mechanism for an air spring according to claim 1, characterized in that: The noise reduction lower seat is connected to the shock absorber tray through a plug-in portion; the plug-in portion includes a plug-in column arranged on the noise reduction lower seat and a positioning hole arranged on the shock absorber tray; the plug-in column on the noise reduction lower seat is plugged into the positioning hole on the shock absorber tray.

5. The noise reduction mechanism for an air spring according to claim 1, characterized in that: The noise reduction upper seat includes an upper seat body, and an upper sleeve through hole is provided on the upper seat body; the noise reduction lower seat includes a lower seat body; the lower seat body is provided with a lower sleeve through hole; the lower seat body and the upper seat body are surface-fitted.

6. The noise reduction mechanism for an air spring according to claim 5, characterized in that: An upper friction plane is provided on one end of the upper seat body close to the lower seat body; a lower friction plane is provided on one end of the lower seat body close to the upper seat body; and Teflon layers are provided on the upper friction plane and the lower friction plane.

7. The noise reduction mechanism for an air spring according to claim 5, characterized in that: The lower seat body includes a lower seat top plate; a lower seat ring plate is provided around the lower seat top plate; the lower seat top plate and the lower seat ring plate form a sleeve-connecting groove.

8. The noise reduction mechanism for an air spring according to claim 6, characterized in that: A connecting ring plate is provided at one end of the lower seat ring plate away from the lower seat top plate; the connecting ring plate extends along a side away from the central axis of the lower seat ring plate.

9. An air spring assembly, characterized in that: It includes a piston and a shock absorber tray; the piston is connected to the shock absorber tray through the noise reduction mechanism according to any one of claims 1 to 8; the noise reduction lower seat is connected to the shock absorber tray; the noise reduction upper seat is connected to the piston of the air spring; the noise reduction upper seat and the noise reduction lower seat are stacked.

10. A vehicle, characterized in that: A suspension system is included, wherein the suspension system includes the air spring assembly according to claim 9.

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