CN215334122U

CN215334122U - Air spring

Info

Publication number: CN215334122U
Application number: CN202121346553.4U
Authority: CN
Inventors: 王冕; 范伟良; 高跃
Original assignee: Zhejiang Kong Hui Automobile Technology Co ltd
Current assignee: Zhejiang Kong Hui Automobile Technology Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-12-28
Anticipated expiration: 2031-06-17

Abstract

The present invention provides an air spring, including: the piston, the air bag and the end cover are sleeved at two ends of the air bag respectively on the outer walls of the piston and the end cover, and the piston, the air bag and the end cover form a sealed chamber together; further comprising: the bearing is used for bearing torsional force, and the bearing seat is used for connecting a vehicle body; the bearing seat is clamped with the piston; the bearing is arranged between the bearing seat and the piston and is simultaneously abutted against the bearing seat and the piston. The utility model has a bearing structure, and can avoid the air bag from being subjected to larger torsional deformation through the rotatability of the bearing, thereby improving the durability of the air bag.

Description

Air spring

Technical Field

The utility model relates to the field of air springs, in particular to an air spring.

Background

The air spring is an ideal vibration isolation element, compressed air is added into the flexible sealed container, and the nonlinear restoring force of air compression is utilized to realize vibration isolation and buffering; in the working process of the air spring, the air spring can not only vertically move up and down, but also generate torsional movement along the axis direction, in the prior art, a bearing is not arranged between a vehicle body and the air spring, in the working process of the air spring, the air bag can be subjected to torsional deformation, the air bag can only bear a certain torsional angle, and the durability of the air bag can be influenced due to the overlarge torsional angle of the air bag.

SUMMERY OF THE UTILITY MODEL

The present invention provides an air spring to solve the above problems.

In order to achieve the purpose, the utility model adopts the following specific technical scheme:

an air spring comprising: the piston, the air bag and the end cover are sleeved at two ends of the air bag respectively on the outer walls of the piston and the end cover, and the piston, the air bag and the end cover form a sealed chamber together; further comprising: the bearing is used for bearing torsional force, and the bearing seat is used for connecting a vehicle body; the bearing seat is clamped with the piston; the bearing is arranged between the bearing seat and the piston and is simultaneously abutted against the bearing seat and the piston.

Preferably, the bearing comprises a first cover plate, a second cover plate and a gasket; the first cover plate is abutted to the lower end face of the bearing seat, the second cover plate is abutted to the upper end face of the piston, and the gasket is used for preventing the surfaces of the first cover plate and the second cover plate from being contacted in the axial direction of the air spring; the surface of the first cover plate, which is far away from the bearing seat, is provided with a first ring groove, the surface of the second cover plate, which is far away from the piston, is provided with a second ring groove matched with a gasket, and the gasket is arranged in the first ring groove and the second ring groove; and in the radial direction of the air spring, the outer edges of the first cover plate and the second cover plate are respectively provided with a connecting part which is matched with the outer edges of the first cover plate and the second cover plate, and the first cover plate and the second cover plate are connected through the matching of the connecting parts.

Preferably, one end of the bearing seat close to the piston is provided with a radial bulge, and one end of the piston far away from the air bag is matched with the radial bulge and connected with the radial bulge; the bearing seat is provided with a stepped surface structure matched with the bearing, and the bearing is abutted to the stepped surface structure; and one end of the bearing seat far away from the piston is provided with a middle hole matched with the vehicle body interface.

Preferably, the device further comprises a piston buckling ring and an end cover buckling ring; the piston buckling ring is used for buckling and pressing the outer wall of the air bag to form a structure which sequentially comprises the piston, the air bag and the piston buckling ring from inside to outside and sealing the air bag; the end cover buckling ring is used for buckling the outer wall of the air bag to form a structure which sequentially comprises the end cover, the air bag and the end cover buckling ring from inside to outside, and the air bag is sealed.

Preferably, the end cover is provided with a platform structure for preventing the buckling ring of the end cover from falling off; the platform structure is located below the end cover buckling ring, and the maximum diameter of the platform structure is larger than the inner diameter of the end cover buckling ring.

Preferably, a protective cover for protecting the air bag is further included; the protection casing is established in the periphery of gasbag, and the both ends of protection casing cup joint respectively at the outer wall of piston and end cover.

The utility model can obtain the following technical effects:

the air bag has a bearing structure, and the air bag is prevented from being subjected to larger torsional deformation through the rotatability of the bearing, so that the durability of the air bag is improved.

Drawings

FIG. 1 is a schematic structural view of an air spring according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a bearing according to an embodiment of the present invention.

Wherein the reference numerals include: the bearing comprises a bearing 1, a bearing seat 2, a piston 3, an air bag 4, an end cover 5, a piston buckling ring 6, an end cover buckling ring 7, a protective cover 8, a platform structure 51, a first cover plate 11, a second cover plate 12, a gasket 13, a first annular groove 111, a first cover plate connecting part 112, a second annular groove 121 and a second cover plate connecting part 122.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1, an air spring includes: the air spring comprises a piston 3, an air bag 4 and an end cover 5, wherein two ends of the air bag 4 are respectively sleeved on the outer walls of the piston 3 and the end cover 5, the piston 3, the air bag 4 and the end cover 5 jointly form a sealed chamber, and the rigidity of the air spring can change along with the external situation in the working process of the air spring, which is shown in the change of the volume of the sealed chamber and the change of the diameter of the section of the air bag 4 attached to the outer wall of the piston 3; the air spring further includes: the bearing device comprises a bearing 1 for bearing torsional force and a bearing seat 2 for connecting a vehicle body; the bearing seat 2 is made of nylon materials, the bearing seat 2 is clamped with the piston 3, and the bearing seat 2 and the piston 3 are ensured to be always connected in the working process; bearing 1 is arranged in between bearing frame 2 and piston 3, and butt bearing frame 2 and piston 3 simultaneously when the air spring produces the torsional motion along the axis direction, bear the torsional force through bearing 1, avoid gasbag 4 to receive great torsional deformation, improve gasbag 4's durability.

As shown in fig. 2, in one embodiment of the present invention, the bearing 1 includes a first cover plate 11, a second cover plate 12, and a spacer 13; the first cover plate 11 abuts against the lower end face of the bearing seat 2, the second cover plate 12 abuts against the upper end face of the piston 3, and the gasket 13 is used for preventing the surfaces of the first cover plate 11 and the second cover plate 12 from contacting in the axial direction of the air spring; the surface of the first cover plate 11, which is far away from the bearing seat 2, is provided with a first ring groove 111, the surface of the second cover plate 12, which is far away from the piston 3, is provided with a second ring groove 121 matched with the gasket 13, the width of the second ring groove 121 is equal to that of the gasket 13, the gasket 13 is arranged in the first ring groove 111 and the second ring groove 121, and in the installation process, the surface of the gasket 13 is coated with lubricating grease to separate sliding surfaces, so that the friction loss is reduced; in the radial direction of the air spring, the outer edges of the first cover plate 11 and the second cover plate 12 are respectively provided with a connecting part which is matched with the outer edges of the first cover plate 11 and the second cover plate 12, the first cover plate 11 and the second cover plate 12 are connected through the matching of the connecting parts, when the air spring is installed, the second cover plate connecting part 122 is bent inwards, so that the second cover plate connecting part 122 enters a gap between the first cover plate connecting part 112 and the edge of the first annular groove 111, the second cover plate connecting part 122 is released, and the connection between the first cover plate 11 and the second cover plate 12 is completed.

In one embodiment of the utility model, one end of the bearing seat 2 close to the piston 3 is provided with a radial bulge, and one end of the piston 3 far away from the air bag 4 is matched with the radial bulge and connected with the radial bulge to ensure that the connection between the two is stable; the bearing seat 2 is provided with a stepped surface structure matched with the bearing 1, the bearing 1 is abutted against the stepped surface structure, and the stepped surface structure reliably bears the bearing 1; one end of the bearing seat 2, which is far away from the piston 3, is provided with a middle hole matched with the vehicle body interface, and the air spring and the vehicle body are connected through the matching of the middle hole and the vehicle body interface.

In one embodiment of the utility model, the device further comprises a piston buckling ring 6 and an end cover buckling ring 7; the piston buckling ring 6 is used for buckling and pressing the outer wall of the air bag 4, which is in contact with the piston 3, so that a structure comprising the piston 3, the air bag 4 and the piston buckling ring 6 in sequence from inside to outside is formed, the stable connection between the piston 3 and the air bag 4 is ensured, and the air bag 4 and the piston 3 are sealed; the end cover buckling and pressing ring 7 is used for buckling and pressing the outer wall of the air bag 4, which is in contact with the end cover 5, so that a structure comprising the end cover 5, the air bag 4 and the end cover buckling and pressing ring 7 is formed from inside to outside in sequence, the end cover 5 is stably connected with the air bag 4, and the air bag 4 and the end cover 5 are sealed.

In one embodiment of the utility model, the end cap 5 is provided with a platform structure 51 for preventing the end cap snap ring 7 from falling off; the platform structure 51 is located below the end cover buckling ring 7, and the maximum diameter of the platform structure 51 is larger than the inner diameter of the end cover buckling ring 7, so that the end cover buckling ring 7 is prevented from falling off due to the movement of the air bag 4 in the working process of the air spring.

In one embodiment of the utility model, a protective cover 8 for protecting the airbag 4 is further included; the periphery at gasbag 4 is established to protection casing 8 cover, and the outer wall at piston 3 and end cover 5 is cup jointed respectively at the both ends of protection casing 8, and protection casing 8 covers the whole outer wall of gasbag 4, exposes the part outside gasbag 4 and seals, plays dustproof and waterproof effect.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the utility model. Variations, modifications, substitutions and alterations of the above-described embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An air spring comprising: the two ends of the air bag are respectively sleeved on the outer walls of the piston and the end cover, and the piston, the air bag and the end cover form a sealed chamber together; it is characterized by also comprising: the bearing is used for bearing torsional force, and the bearing seat is used for connecting a vehicle body; the bearing seat is clamped with the piston; the bearing is arranged between the bearing seat and the piston and is simultaneously abutted against the bearing seat and the piston.

2. The air spring of claim 1, wherein the bearing includes a first cover plate, a second cover plate, and a spacer; the first cover plate is abutted against the lower end face of the bearing seat, the second cover plate is abutted against the upper end face of the piston, and the gasket is used for preventing the surfaces of the first cover plate and the second cover plate from being in contact in the axial direction of the air spring; the surface of the first cover plate, which is far away from the bearing seat, is provided with a first ring groove, the surface of the second cover plate, which is far away from the piston, is provided with a second ring groove matched with the gasket, and the gasket is arranged in the first ring groove and the second ring groove; and in the radial direction of the air spring, the outer edges of the first cover plate and the second cover plate are respectively provided with a connecting part which is matched with the outer edge of the second cover plate, and the first cover plate and the second cover plate are connected through the matching of the connecting parts.

3. The air spring of claim 1, wherein the end of the bearing housing adjacent the piston has a radial projection, and the end of the piston distal from the bladder is adapted to and connected to the radial projection; the bearing seat is provided with a stepped surface structure matched with the bearing, and the bearing is abutted to the stepped surface structure; and one end of the bearing seat, which is far away from the piston, is provided with a middle hole matched with the vehicle body interface.

4. The air spring of claim 1, further comprising a piston crimp ring and an end cap crimp ring; the piston buckling ring is used for buckling and pressing the outer wall of the air bag to form a structure which sequentially comprises the piston, the air bag and the piston buckling ring from inside to outside and sealing the air bag; the end cover buckling ring is used for buckling the outer wall of the air bag to form a structure which sequentially comprises the end cover, the air bag and the end cover buckling ring from inside to outside, and the air bag is sealed.

5. The air spring of claim 4, wherein said end cap is provided with a platform structure for preventing said end cap retaining ring from falling off; the platform structure is located below the end cover buckling ring, and the maximum diameter of the platform structure is larger than the inner diameter of the end cover buckling ring.

6. The air spring of claim 1, further comprising a protective cover for protecting said air bag; the protection casing cover is established the periphery of gasbag, the both ends of protection casing are cup jointed respectively the piston with the outer wall of end cover.