CN114321252B - Air spring assembly and automobile - Google Patents

Abstract

The invention provides an air spring assembly and an automobile, and relates to the technical field of automobiles. Wherein, the air spring assembly includes: a housing assembly, a damper, and a solenoid valve; the shell assembly is sleeved on the shock absorber, a main cavity and a secondary cavity which are separated by a wall plate are defined in the shell assembly, and a through hole for communicating the main cavity and the secondary cavity is formed in the wall plate; the electromagnetic valve is arranged on the wall plate and used for controlling the opening and closing of the through hole; the axis of the solenoid valve is parallel to the axis of the damper. The automobile comprises: the air spring assembly described above; the air spring assembly includes a top cover and a damper; the shock absorber comprises a piston rod and a cylinder barrel, and one end of the piston rod is arranged in the cylinder barrel in a sliding way; the top cover is sleeved on the piston rod and is used for being fixedly connected with the automobile body; the cylinder barrel is used for being fixedly connected with a lower swing arm of the automobile suspension. Since the axis of the solenoid valve is parallel to the axis of the damper, the demand for radial installation space of the air spring can be reduced, thereby reducing the arrangement space of the air spring in the suspension.

Description

Air spring assembly and automobile

Technical Field

The invention relates to an air spring assembly and an automobile, and belongs to the technical field of automobiles.

Background

The air spring, namely, the spring which is filled with compressed air in a telescopic closed container and utilizes the air elasticity effect. The air spring has various switchable rigidities by changing the size of the inner volume of the closed container of the air spring, so that different rigidity requirements of a vehicle suspension are met, and the vehicle has good operability and comfortableness.

In the related art, the stiffness-variable air spring comprises a shock absorber, a top cover, a bag cover, a shell and an electromagnetic valve; the shock absorber comprises a piston rod and a cylinder barrel, and one end of the piston rod is arranged in the cylinder barrel in a sliding way; the top cover is sleeved at the other end of the piston rod and is tightly connected with the piston rod; the bag cover is of a tubular structure, the first end of the bag cover is sleeved on the top cover and is fixedly connected with the top cover, the second end of the bag cover is sleeved on the first end of the shell and is fixedly connected with the shell, and the bag cover, the top cover and the shell jointly define a main chamber for containing compressed air; the shell is sleeved on the cylinder barrel and is fixedly connected with the cylinder barrel, at least one auxiliary chamber is arranged in the shell, and an air supply air passage is arranged between each auxiliary chamber and the main chamber; each auxiliary chamber corresponds to an electromagnetic valve, one end of the electromagnetic valve is located in the auxiliary chamber, the other end of the electromagnetic valve is located outside the auxiliary chamber, and the electromagnetic valve is used for controlling the on or off of the air supply air passage so as to realize the communication between the main chamber and the auxiliary chamber, so that the air spring has a plurality of switchable rigidities.

However, since the axis of the solenoid valve is perpendicular to the axis of the damper and the axial dimension of the solenoid valve is long, the radial installation space requirement of the air spring is increased.

Disclosure of Invention

The invention provides an air spring assembly and an automobile, which solve the problems that the radial installation space requirement of an air spring is improved because the axis of an electromagnetic valve is perpendicular to the axis of a shock absorber and the axial dimension of the electromagnetic valve is longer in the prior art.

A first aspect of the present invention provides an air spring assembly comprising a housing assembly, a damper, and a solenoid valve;

the shell assembly is sleeved on the shock absorber, a main cavity and a secondary cavity which are separated by a wall plate are defined in the shell assembly, and a through hole for communicating the main cavity and the secondary cavity is formed in the wall plate;

the electromagnetic valve is arranged on the wall plate and used for controlling the opening and closing of the through hole; the axis of the solenoid valve is parallel to the axis of the shock absorber.

Optionally, the electromagnetic valve is arranged on one side of the wall plate facing the auxiliary chamber;

the electromagnetic valve comprises a hollow valve body and a valve core, wherein the valve body is provided with an air inlet and an air outlet which are communicated with a cavity in the valve body, and the air inlet, the air outlet and the cavity define an air inlet flow passage of the electromagnetic valve; the valve core is movably arranged in the cavity of the valve body and used for controlling the on-off of the air inlet flow passage;

the through hole is connected with the air inlet, and the air outlet is positioned in the auxiliary cavity.

Optionally, the housing assembly comprises a housing, a top cover, and a tubular bladder;

the shell, the top cover and the tubular bag skin are all sleeved on the shock absorber, the tubular bag skin is positioned between the shell and the top cover, and two ends of the tubular bag skin are respectively and fixedly connected with the shell and the top cover;

the top cover, the tubular bladder and the housing together define the primary chamber, the housing defining the secondary chamber therein;

a portion of the housing acts as the wall plate.

Optionally, a mounting hole is formed in a part, adjacent to the wall plate, of the shell, a mounting seat abutting against the wall plate is arranged in the mounting hole, a mounting groove is formed in the mounting seat, and the electromagnetic valve is mounted in the mounting groove;

the tank bottom of mounting groove be provided with the first through-hole of through-hole intercommunication, the cell wall of mounting groove be provided with the second through-hole of vice cavity intercommunication.

Optionally, a center line of the through hole is inclined to an axis of the damper.

Optionally, the mounting seat is a sleeve, and the inner wall of the sleeve defines the mounting groove;

the end face of the closed end of the sleeve is provided with an inclined portion, the first through holes are formed in the inclined portion, and/or the side wall of the sleeve is provided with a plurality of second through holes.

Optionally, a hollow connecting piece is also included;

the connecting piece is arranged in the first through hole and used for connecting the wallboard and the sleeve.

Optionally, the connecting piece is a blind rivet nut.

Optionally, the housing comprises a lower housing and an upper housing assembly;

the upper shell assembly cover is arranged on the lower shell and limits the auxiliary chamber with the lower shell, two ends of the tubular capsule are respectively and fixedly connected with the top cover and the upper shell assembly, the top cover and the tubular capsule jointly limit the main chamber.

Optionally, the upper shell assembly comprises a first upper shell and a second upper shell; the first upper housing is capped on the second upper housing, and the first upper housing and the second upper housing define a cavity in communication with the main chamber.

A second aspect of the present invention provides an automobile comprising the air spring assembly described above;

the air spring assembly includes a top cover and a damper;

the shock absorber comprises a piston rod and a cylinder barrel, and one end of the piston rod is arranged in the cylinder barrel in a sliding manner;

the top cover is sleeved on the piston rod and is used for being in fastening connection with an automobile body;

the cylinder barrel is used for being fixedly connected with a lower swing arm of an automobile suspension.

The invention provides an air spring assembly and an automobile, comprising: a housing assembly, a damper, and a solenoid valve; the shell assembly is sleeved on the shock absorber, a main cavity and a secondary cavity which are separated by a wall plate are defined in the shell assembly, and a through hole for communicating the main cavity and the secondary cavity is formed in the wall plate; the electromagnetic valve is arranged on the wall plate and used for controlling the opening and closing of the through hole; the axis of the solenoid valve is parallel to the axis of the damper. Since the axis of the electromagnetic valve is parallel to the axis of the shock absorber, the joint of the electromagnetic valve can be arranged parallel to the shock absorber, so that the requirement of the air spring on radial installation space can be reduced, and the arrangement space of the air spring in the suspension can be reduced.

Drawings

The above and other objects, features and advantages of embodiments of the present invention will become more readily apparent from the following detailed description with reference to the accompanying drawings. Embodiments of the invention will now be described, by way of example and not limitation, in the figures of the accompanying drawings, in which:

FIG. 1 is a cross-sectional view of an air spring assembly provided in an embodiment of the present invention;

FIG. 2 is a perspective view of an air spring assembly provided in an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of the solenoid valve of FIG. 1;

FIG. 4 is an exploded view of a housing provided in an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a lower housing provided by an embodiment of the present invention;

FIG. 6 is a perspective view of a lower housing provided in an embodiment of the present invention;

fig. 7 is a perspective view of a first upper housing according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of a second upper housing provided in an embodiment of the present invention;

fig. 9 is a perspective view of a second upper housing according to an embodiment of the present invention.

Reference numerals:

a 100-housing assembly;

110-a housing;

111-an upper shell assembly;

1111—a first upper housing;

1112-a second upper housing; 11121-a second tubular portion; 11122-an outer flange;

112-a lower shell; 1121-a first tubular portion; 1122-plate body; 1123-an inner recess; 1124—bends;

120-top cap; 130-tubular capsule; 140-a main chamber; 150-subchambers; 160-through holes;

200-vibration damper; 210-a piston rod; 220-cylinder barrel;

300-electromagnetic valve;

400-mounting seats; 410-a first through hole; 420-a second through hole; 430-an inclined portion;

500-connectors.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

It should be understood that the following examples do not limit the order of execution of the steps in the method claimed in the present invention. The individual steps of the method of the invention can be carried out in any possible order and in a cyclic manner without contradiction.

In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The air spring, namely, the spring which is filled with compressed air in a telescopic closed container and utilizes the air elasticity effect. The air spring has various switchable rigidities by changing the size of the inner volume of the closed container of the air spring, so that different rigidity requirements of a vehicle suspension are met, and the vehicle has good operability and comfortableness.

In the related art, the stiffness-variable air spring comprises a shock absorber, a top cover, a bag cover, a shell and an electromagnetic valve; the shock absorber comprises a piston rod and a cylinder barrel, and one end of the piston rod is arranged in the cylinder barrel in a sliding way; the top cover is sleeved at the other end of the piston rod and is tightly connected with the piston rod; the bag cover is of a tubular structure, the first end of the bag cover is sleeved on the top cover and is fixedly connected with the top cover, the second end of the bag cover is sleeved on the first end of the shell and is fixedly connected with the shell, and the bag cover, the top cover and the shell jointly define a main chamber for containing compressed air; the shell is sleeved on the cylinder barrel and is fixedly connected with the cylinder barrel, at least one auxiliary chamber is arranged in the shell, and an air supply air passage is arranged between each auxiliary chamber and the main chamber; each auxiliary chamber corresponds to an electromagnetic valve, one end of the electromagnetic valve is located in the auxiliary chamber, the other end of the electromagnetic valve is located outside the auxiliary chamber, and the electromagnetic valve is used for controlling the on or off of the air supply air passage so as to realize the communication between the main chamber and the auxiliary chamber, so that the air spring has a plurality of switchable rigidities.

However, since the axis of the solenoid valve is perpendicular to the axis of the damper and the axial dimension of the solenoid valve is long, the radial installation space requirement of the air spring is increased.

Through careful analysis, the inventors of the present disclosure considered that the above-described problems occurred mainly because the solenoid valve was entirely of a cylindrical structure, the axial dimension of which was long, one end was provided with an air inlet and an air outlet, and the other end was provided with a joint for connection with a control harness, thereby controlling the movement of a spool inside the solenoid valve. When the axis of the solenoid valve is arranged perpendicular to the axis of the shock absorber, more radial space needs to be reserved in the suspension to satisfy the arrangement space required for the control harness and the arrangement space required for the solenoid valve itself, which makes the application range of the air spring small, for example, difficult to arrange in a relatively compact suspension arrangement space.

To above-mentioned problem, this disclosure sets up the axis of solenoid valve on a parallel with the axis of shock absorber to the solenoid valve can be vertical to arrange downwards, and then solenoid valve and control pencil all can be laid along the axis of shock absorber, with the demand that reduces the radial installation space of solenoid valve and avoid the control pencil to arrange the occupation of space, so air spring can be applied to more compact suspension arrangement space, with this range of application that improves air spring.

Specifically, the present disclosure provides an air spring assembly including a housing assembly, a damper, and a solenoid valve; the shell assembly is sleeved on the shock absorber, a main cavity and a secondary cavity which are separated by a wall plate are defined in the shell assembly, and a through hole for communicating the main cavity and the secondary cavity is formed in the wall plate; the electromagnetic valve is arranged on the wall plate and used for controlling the opening and closing of the through hole. Because the axis of the electromagnetic valve is parallel to the axis of the shock absorber, the installation space requirement of the electromagnetic valve is reduced, and the radial installation space requirement of the air spring is further reduced.

The air spring assembly and the automobile provided by the invention are described in detail below with reference to specific embodiments.

FIG. 1 is a cross-sectional view of an air spring assembly provided in this embodiment; fig. 2 is a perspective view of an air spring assembly provided in this embodiment.

As shown in fig. 1 and 2, a first aspect of the present embodiment is to provide an air spring assembly including a housing assembly 100, a damper 200, and a solenoid valve 300.

Wherein, the housing assembly 100 is sleeved on the damper 200, and the housing assembly 100 defines a main chamber 140 and a sub chamber 150 partitioned by a wall plate, and a through hole 160 for communicating the main chamber 140 and the sub chamber 150 is provided on the wall plate.

The solenoid valve 300 is installed on the wall plate and is used for controlling the opening and closing of the through hole 160; the axis of solenoid valve 300 is parallel to the axis of shock absorber 200.

The opening and closing of the through-hole 160 is controlled by the solenoid valve 300, thereby controlling the conduction and closing of the main chamber 140 and the sub-chamber 150, and thus the volume of the air spring assembly containing the compressed gas can be changed, thereby providing the air spring with a plurality of switchable stiffness.

Since the axis of the solenoid valve 300 is parallel to the axis of the shock absorber 200, that is, the solenoid valve 300 is installed in the axial direction of the shock absorber 200, the radial installation space requirement of the solenoid valve 300 is greatly reduced, the radial installation space requirement of the solenoid valve 300 is changed from the axial dimension of the solenoid valve 300 to the radial dimension of the solenoid valve 300, and the radial dimension of the solenoid valve 300 is much smaller than the axial dimension of the solenoid valve 300, thereby reducing the requirement of the air spring on the radial installation space and further reducing the arrangement space required by the air spring in the suspension. At the same time, because the air spring requires less radial installation space, the housing assembly 100 may occupy more space in the suspension, thereby increasing the working volume of the primary chamber 140 and/or the secondary chamber 150 and, in turn, increasing the stiffness tuning range of the air spring.

The function of the damper 200 is to connect the vehicle body and the vehicle suspension, wherein the damper 200 is fastened to the lower swing arm of the vehicle suspension.

Alternatively, the shock absorber 200 may employ a tube type shock absorber, and the shock absorber 200 includes a piston rod 210, a cylinder tube 220, and a piston, for example. One end of the piston rod 210 is fixedly connected with the piston, the other end of the piston rod 210 is fixedly connected with the housing assembly 100 and the body of the automobile is fixedly connected; the piston is slidable within the cylinder 220. The cylinder 220 may be fastened to the lower yoke of the lower swing arm of the automotive suspension, for example, the cylinder 220 may be fastened to the lower yoke using bolts. Of course, shock absorber 200 can also be a dual acting tube shock absorber, an inflatable shock absorber, or a damping adjustable shock absorber.

Fig. 3 is an enlarged view of a portion of the solenoid valve of fig. 1.

In an alternative implementation, as shown in fig. 3, solenoid valve 300 is disposed on the side of the wall plate facing sub-chamber 150.

Meanwhile, the electromagnetic valve 300 comprises a hollow valve body and a valve core, wherein the valve body is provided with an air inlet and an air outlet which are communicated with a cavity in the valve body, and the air inlet and the air outlet and the cavity define an air inlet flow passage of the electromagnetic valve 300; the valve core is movably arranged in the cavity of the valve body and used for controlling the on-off of the air inlet flow passage.

Wherein the through hole 160 is connected with the air inlet, and the air outlet is located in the sub-chamber 150, so that the solenoid valve 300 can control the opening and closing of the through hole 160.

Since the main chamber 140 is located above the sub-chamber 150 and the main chamber 140 is closely abutted against the vehicle body, the solenoid valve 300 is disposed in the sub-chamber 150 such that the joint of the solenoid valve 300 may be located in the sub-chamber 150 or the joint of the solenoid valve 300 may be located under the housing assembly 100, thereby utilizing the space directly under the housing assembly 100 to route the control harness and avoiding the routing of the solenoid valve 300 to limit the volume of the air spring assembly to expand the stiffness adjustable range of the air spring.

The solenoid valve 300 may be disposed in the main chamber 140 in addition to the sub-chamber 150.

As shown in fig. 1 and 3, in an alternative implementation, the housing assembly 100 includes a housing 110, a top cover 120, and a tubular bladder 130.

Wherein a portion of the housing 110 serves as a wall plate such that the through-hole 160 is provided on the housing 110.

The shell 110, the top cover 120 and the tubular capsule 130 are all sleeved on the shock absorber 200, the tubular capsule 130 is positioned between the shell 110 and the top cover 120, and two ends of the tubular capsule 130 are respectively and tightly connected with the shell 110 and the top cover 120. Wherein the top cover 120, the tubular bladder 130 and the housing 110 together define a primary chamber 140, and the housing 110 defines a secondary chamber 150 therein.

Alternatively, the tubular bladder 130 is tubular in structure and is made of an elastic material, so that the volume of the chamber 140 is variable.

The both ends of the tubular bladder 130 should be hermetically connected to the top cover 120 and the housing 110, respectively, to ensure the sealability of the main chamber 140.

The tubular bladder 130 may be fastened to the top cover 120 and the housing 110 by a snap fit or by the provision of fasteners, such as annular snap rings. Wherein, two ends of the tubular bag cover 130 are respectively sleeved with an annular buckling ring, and the buckling rings can respectively fix the two ends of the tubular bag cover 130 on the shell 110 and the top cover 120.

For example, compressed air may first enter the main chamber 140, so an air supply hole communicating with the main chamber 140 may be provided on a sidewall of the top cover 120, the air supply hole communicating with an air supply system on the automobile. For example, an inlet pipe joint and a pressure maintaining valve are further included, wherein one end of the inlet pipe joint is communicated with the air supply hole and is fixedly connected with the top cover 120, and the other end of the inlet pipe joint is communicated with the pressure maintaining valve. The pressure maintaining valve may maintain the pressure of the gas entering the main chamber 140 constant.

It should be noted that the air supply hole may be provided in the housing 110.

In order to reduce the radial installation space required for the air spring, the axis of the air intake pipe joint is optionally L-shaped so that the axis of the pressure maintaining valve is parallel to the axis of the shock absorber 200, whereby the radial installation space required for the air spring can be reduced.

Further, to avoid damage to the tubular bladder 130 during use, a protective sleeve is optionally included. Wherein, the protective sleeve is sleeved on the tubular bag skin 130, wherein, part of the tubular bag skin 130 is positioned outside the protective sleeve. One end of the protective sleeve is fixedly connected with the tubular bag skin 130, and the other end of the protective sleeve is fixedly connected with the shell 110.

As shown in fig. 1, the housing assembly 100 may optionally include a buffer block that is sleeved on the damper 200, the buffer block being located in the main chamber 140 and being fastened to the top cover 120, the buffer block being made of an elastic material, so that the top cover 120 is prevented from being in hard contact with the cylinder 220 of the damper 200.

As shown in fig. 1, the top cover 120 and the piston rod 210 may be fastened by any technique in the prior art, for example, a lock nut is sleeved on the piston rod 210, and the lock nut is located above the top cover 120.

Fig. 4 is an exploded view of the case provided in the present embodiment.

As shown in fig. 3 and 4, alternatively, a mounting hole is formed in a portion of the housing 110 adjacent to the wall plate, a mounting seat 400 abutting against the wall plate is disposed in the mounting hole, a mounting groove is formed in the mounting seat 400, and the solenoid valve 300 is mounted in the mounting groove.

Wherein, the groove bottom of the installation groove is provided with a first through hole 410 communicated with the through hole 160, and the groove wall of the installation groove is provided with a second through hole 420 communicated with the sub chamber 150, so that the solenoid valve 300 can control the opening and closing of the through hole 160.

Since the axis of the solenoid valve 300 is installed in the axial direction of the damper 200, the portion of the housing 110 adjacent to the wall plate should have a plate-like structure in order to meet the installation requirement of the solenoid valve 300.

The mount 400 abuts the wall plate such that the mount 400 is in sealing engagement with the wall plate such that the first through hole 410 communicates with the through hole 160 to ensure communication between the primary chamber 140 and the secondary chamber 150.

The first and second through holes 410 and 420 are provided such that the flow direction of the compressed gas can be changed by the solenoid valve 300, so that the main chamber 140 and the sub chamber 150 communicate.

It will be appreciated that the inner wall of the housing 110 is recessed outwardly in the radial direction to form an inner recess 1123, the inner recess 1123 having an abutting surface in surface contact with the mount 400, the through-hole 160 being disposed on the abutting surface, such that the axis of the through-hole 160 is parallel to the axis of the damper 200 or at an angle to the axis of the damper 200.

As shown in fig. 3, alternatively, the center line of the through hole 160 is inclined to the axis of the damper 200, so that the difficulty in manufacturing the housing 110 can be reduced while the wall plate is abutted to the mount 400.

Alternatively, as shown in fig. 4, the mount 400 is a sleeve, and the inner wall of the sleeve defines a mounting groove.

Wherein the end surface of the closed end of the sleeve has an inclined portion 430, the first through hole 410 is provided at the inclined portion 430, and/or the sidewall of the sleeve is provided with a plurality of second through holes 420, so that the mounting seat 400 fixes the solenoid valve 300 on the housing 110 and allows the solenoid valve 300 to control the opening and closing of the through holes 160.

It should be noted that, as shown in fig. 3, a first sealing ring is disposed between the solenoid valve 300 and the sleeve to ensure that the flow path between the sub-chamber 150 and the main chamber 140 is airtight.

The solenoid valve 300 and the open end of the sleeve can be fastened and connected by adopting a threaded connection or a clamping connection manner, for example, a first clamping spring is sleeved on the solenoid valve 300, the first clamping spring is positioned in the sleeve, and the first clamping spring fastens the solenoid valve 300 in the sleeve.

The axis of the first through hole 410 may be polygonal or arc-shaped to ensure that the air inlet of the solenoid valve 300 communicates with the through hole 160.

By providing the plurality of second through holes 420, the exchange rate of the compressed air between the auxiliary chamber 150 and the electromagnetic valve 300 is faster, and the use requirement can be satisfied in time.

The inclined portion 430 is provided so that the mount 400 can abut against the wall plate so that the first through hole 410 communicates with the through hole 160 in the wall plate. Wherein, the inclined portion 430 means that an inclined surface is provided at the outer side of the closed end of the mounting seat 400, and the inclined surface makes the mounting seat 400 contact with the wall plate surface.

The cross section of the sleeve is round or polygonal.

It should be noted that, the inclined portion 430 is a part of the sleeve itself, that is, the mounting base 400 may be manufactured by an integrally formed process, so as to improve the production efficiency of the mounting base 400.

It should be further noted that the sleeve is fastened to the housing 110 when the sleeve is inserted into the mounting hole, so that the inclined portion 430 abuts against the wall plate while preventing the sleeve from falling from the sub-chamber 150. For example, the housing 110 is welded to the sleeve.

Optionally, a hollow structured connector 500 is also included. Wherein the connection member 500 is installed in the first through hole 410 for connecting the wall plate and the sleeve. The arrangement of the connecting piece 500 can reduce the assembly difficulty of the sleeve and the wallboard and improve the connection firmness between the sleeve and the shell 110.

In order to ensure communication between the main chamber 140 and the sub chamber 150, the first end opening of the first through hole 410 needs to be coaxially disposed with the through hole 160, ensuring that the cross section of the passage formed between the first through hole 410 and the through hole 160 is a predetermined size, and the assembly size between the first through hole 410 and the through hole 160 is not visible when the mount 400 is assembled, so that by providing the connection member 500, not only the sleeve can be ensured to be mounted in place, but also the assembly efficiency of the sleeve and the wall plate can be improved.

In the implementation mode of the connecting piece 500, the connecting piece 500 is a rivet nut, the sleeve and the wallboard are riveted by adopting the rivet nut, the assembly process is simple, and excessive assembly equipment is not required to be input.

In another implementation of the connector 500, the connector 500 includes a threaded tube, one end of which is in threaded connection with the inner wall of the first through hole 410, and a connection nut, which is sleeved on the other end of the threaded tube and is located in the main chamber 140.

As shown in fig. 3 and 4, in an alternative implementation, the housing 110 includes a lower shell 112 and an upper shell assembly 111. Wherein, lower shell 112 and upper shell assembly 111 are both sleeved on shock absorber 200.

The upper shell assembly 111 is covered on the lower shell 112 and defines a secondary chamber 150 with the lower shell 112, two ends of the tubular bladder 130 are respectively and fixedly connected with the top cover 120 and the upper shell assembly 111, the top cover 120 and the tubular bladder 130 jointly define a primary chamber 140.

Alternatively, the upper case assembly 111 and the lower case 112 may be fastened by welding to ensure sealability between the upper case assembly 111 and the lower case 112. Of course, the upper shell assembly 111 and the lower shell 112 may also be realized by a clamping connection or a threaded connection.

It should be noted that, the mounting hole is provided on the lower case 112 to ensure that the joint of the solenoid valve 300 can be located below the lower case 112.

It should be further noted that when the lower case 112 is mounted on the damper 200, one end of the lower case 112 is fastened to the damper 200, and the lower case 112 is in clearance fit with the damper 200 to form a flow path communicating the main chamber 140 and the sub chamber 150, such that the radial dimension of the case 110 can be reduced, thereby reducing the radial installation space required for the air spring assembly.

Fig. 5 is a cross-sectional view of the lower case provided in the present embodiment; fig. 6 is a perspective view of the lower case provided in the present embodiment.

As shown in fig. 5 and 6, the lower shell 112 optionally includes a first tubular portion 1121, a plate body 1122, and an inner recess 1123.

Wherein, plate body 1122 is sleeved on the first end of first tubular part 1121 and is fastened and connected with first tubular part 1121, and the mounting hole is provided on plate body 1122.

An inner wall of the first tubular portion 1121 is recessed outward in a radial direction by a portion to form an inner recessed portion 1123, so that the inner recessed portion 1123 is located in the sub-chamber 150 and is more capable of abutting against the inclined portion 430.

The concave portion 1123 may have a curved surface structure to ensure that the concave portion 1123 is in surface contact with the inclined portion 430. For example, the longitudinal section of the concave portion 1123 includes a first inclined section and a second inclined section, the first end of the first inclined section and the first end of the second inclined section are fastened and connected, the second end of the first inclined section and the second end of the second inclined section are fastened and connected with the first tubular portion 1121, respectively, the first inclined section is located above the second inclined section, and the through hole 160 is located on the second inclined section.

The second inclined section has a flat plate structure to ensure that the inclined portion 430 is in surface contact with the concave portion 1123.

The cross section of the plate body 1122 is polygonal. Wherein, the plate 1122 may be parallel to the horizontal plane or have an included angle.

Illustratively, the plate body 1122 is a polygonal plate.

The first tubular portion 1121 may be cylindrical in shape or stepped shaft in shape. For example, the first tubular portion 1121 is a hollow circular tube.

As shown in fig. 5 and 6, the edge of the plate 1122 may be provided with a bending portion 1124, and the bending portion 1124 has a ring-shaped structure, so that the fastening connection with the housing assembly 100 is facilitated by the bending portion 1124.

For example, the bending portion 1124 is welded to the upper case assembly 111, or the bending portion 1124 is clamped to the upper case assembly 111.

The cross-sectional shape of the bent portion 1124 is the same as the edge shape of the plate body 1122.

The first tubular portion 1121, the plate body 1122, the concave portion 1123, and the bending portion 1124 may be integrally formed, and may be manufactured by an internal high-pressure molding process.

It should be noted that, referring to fig. 3, the first tubular portion 1121 is in clearance fit with the damper 200 and one end of the first tubular portion 1121 is sealingly connected with the damper 200, so that the inner wall of the first tubular portion 1121 defines a flow passage communicating the main chamber 140 and the sub-chamber 150. For example, the inner wall of the first tubular portion 1121 extends inward in the radial direction to form a fixed ring portion, and a second seal ring and a spacer ring are disposed above the fixed ring portion, and are both sleeved on the shock absorber 200.

As shown in fig. 3 and 4, the upper case assembly 111 optionally includes a first upper case 1111 and a second upper case 1112. Wherein the first upper housing 1111 is capped on the second upper housing 1112, and the first upper housing 1111 and the second upper housing 1112 define a cavity communicating with the main chamber 140, such that the main chamber 140 can communicate with the sub-chamber 150, so that the air spring has a plurality of switchable stiffness.

When the first upper casing 1111 and the second upper casing 1112 define a cavity communicating with the main chamber 140, the first upper casing 1111 and the second upper casing 1112 are fastened and connected to ensure tightness, for example, a joint between the first upper casing 1111 and the second upper casing 1112 is welded and fixed. In this case, the welding method can ensure the connection quality and can improve the manufacturing efficiency of the upper case assembly 111.

Fig. 7 is a perspective view of the first upper housing provided in the present embodiment.

As shown in fig. 7, the first upper housing 1111 may be exemplarily a cylindrical structure, and a closed end of the first upper housing 1111 is provided with a fitting hole through which the damper 200 passes, and the damper 200 abuts against the closed end of the first upper housing 1111, so that the damper 200 and the first upper housing 1111 may be rapidly positioned during assembly. Meanwhile, the closed end of the first upper housing 1111 is also provided with a plurality of through holes around the axis of the shock absorber 200 for communicating with the main chamber 140 and the cavities defined by the first and second upper housings 1111 and 1112.

When the first upper housing 1111 may have a cylindrical structure, the cross section of the first upper housing 1111 may be circular or polygonal, and/or the cross section size of the first upper housing 1111 may be constant or non-constant. For example, when the first upper casing 1111 is circular in cross section, the inner diameter of the first upper casing 1111 is tapered in the axial direction of the shock absorber 200, i.e., the outer shape of the first upper casing 1111 is a stepped shaft shape.

It should be noted that the second upper housing 1112 is located between the lower housing 112 and the first upper housing 1111, and the second upper housing 1112 and the lower housing 112 define the sub chamber 150.

In this embodiment, the tubular bladder 130 is sleeved on the closed end of the first upper casing 1111 and the tubular bladder 130 is fixed to the first upper casing 1111 by a 160 snap ring.

Alternatively, as shown in fig. 1, 2 and 7, the first upper casing 1111 may have a stepped shaft shape to match with other components of the air spring assembly, for example, a dust cover sleeved on the first upper casing 1111, one end of the dust cover abuts against the first upper casing 1111, and the other end of the dust cover is sleeved on and fastened to the casing. Since the first upper housing 1111 has a stepped shaft shape, the radial dimension of the air spring is not increased after the dust cover is fitted.

Fig. 8 is a sectional view of the second upper case provided in the present embodiment; fig. 9 is a perspective view of the second upper case provided in the present embodiment.

As shown in fig. 8 and 9, the second upper housing 1112 optionally includes a second tubular portion 11121 and an outer flange portion 11122.

Referring to fig. 3, a second tubular portion 11121 is fitted over the first tubular portion 1121, and both ends of the second tubular portion 11121 are respectively fastened to the second end of the first tubular portion 1121 and the plate body 1122, thereby defining the sub chamber 150.

Referring to fig. 3, a portion of the inner wall of the second tubular portion 11121 is recessed outwardly in a radial direction to form an outer flange 11122, the outer flange 11122 being adapted to be disposed over the inner recess 1123 of the lower shell 112. Wherein the bottom surface of the outer protrusion 11122 is disposed coplanar with the bottom surface of the second tubular portion 11121.

The second tubular portion 11121 and the outer protruding portion 11122 may be integrally formed, and thus, the manufacturing efficiency of the second upper case 1112 can be improved.

The outer shape of the second tubular portion 11121 may be a cylindrical shape or a stepped shaft shape. For example, the second tubular portion 11121 is a hollow circular tube.

The outer protrusion 11122 may have a curved surface structure so as to ensure that the outer protrusion 11122 can be covered on the inner recess 1123. For example, the longitudinal section of the outer flange 11122 may be arcuate, or the longitudinal section of the outer flange 11122 may include at least two inclined segments that are connected in series, with the centerlines of all of the inclined segments not being collinear.

A second aspect of this embodiment is to provide an automobile including the air spring assembly described above. Wherein the air spring assembly includes a top cover 120 and a damper 200.

The shock absorber 200 includes a piston rod 210 and a cylinder 220, one end of the piston rod 210 being slidably disposed within the cylinder 220. Wherein, the top cover 120 is sleeved on the piston rod 210 and is used for being fastened and connected with the automobile body; the cylinder 220 is used for being fastened and connected with a lower swing arm of an automobile suspension.

The structure and advantages of the air spring assembly have been set forth in detail in the foregoing description and are not further described herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. An air spring assembly is characterized by comprising a shell assembly, a shock absorber and an electromagnetic valve;

the shell assembly is sleeved on the shock absorber, a main cavity and a secondary cavity which are separated by a wall plate are defined in the shell assembly, and a through hole for communicating the main cavity and the secondary cavity is formed in the wall plate;

the electromagnetic valve is arranged on the wall plate and used for controlling the opening and closing of the through hole; the axis of the electromagnetic valve is parallel to the axis of the shock absorber;

the electromagnetic valve is arranged on one side of the wall plate, which faces the auxiliary chamber;

the electromagnetic valve comprises a hollow valve body and a valve core, wherein the valve body is provided with an air inlet and an air outlet which are communicated with a cavity in the valve body, and the air inlet, the air outlet and the cavity define an air inlet flow passage of the electromagnetic valve; the valve core is movably arranged in the cavity of the valve body and used for controlling the on-off of the air inlet flow passage;

the through hole is connected with the air inlet, and the air outlet is positioned in the auxiliary cavity.

2. The air spring assembly of claim 1 wherein said housing assembly includes a housing, a top cover and a tubular bladder;

the shell, the top cover and the tubular bag skin are all sleeved on the shock absorber, the tubular bag skin is positioned between the shell and the top cover, and two ends of the tubular bag skin are respectively and fixedly connected with the shell and the top cover;

the top cover, the tubular bladder and the housing together define the primary chamber, the housing defining the secondary chamber therein;

a portion of the housing acts as the wall plate.

3. The air spring assembly of claim 2 wherein a portion of said housing adjacent said wall plate is provided with a mounting hole, said mounting hole having a mounting seat disposed therein for abutment with said wall plate, said mounting seat having a mounting slot disposed therein, said solenoid valve being mounted in said mounting slot;

the tank bottom of mounting groove be provided with the first through-hole of through-hole intercommunication, the cell wall of mounting groove be provided with the second through-hole of vice cavity intercommunication.

4. An air spring assembly according to claim 3 wherein the centerline of said through bore is oblique to the axis of said damper.

5. The air spring assembly of claim 4 wherein said mounting seat is a sleeve, an inner wall of said sleeve defining said mounting slot;

the end face of the closed end of the sleeve is provided with an inclined portion, the first through holes are formed in the inclined portion, and/or the side wall of the sleeve is provided with a plurality of second through holes.

6. The air spring assembly of claim 5 further comprising a hollow structural connector;

the connecting piece is arranged in the first through hole and used for connecting the wallboard and the sleeve.

7. The air spring assembly of claim 6 wherein said connector is a blind rivet nut.

8. The air spring assembly according to any one of claims 2-7, wherein said housing includes a lower shell and an upper shell assembly;

the upper shell assembly cover is arranged on the lower shell and limits the auxiliary chamber with the lower shell, two ends of the tubular capsule are respectively and fixedly connected with the top cover and the upper shell assembly, the top cover and the tubular capsule jointly limit the main chamber.

9. An automobile comprising the air spring assembly of any one of claims 1-8;

the air spring assembly includes a top cover and a damper;

the shock absorber comprises a piston rod and a cylinder barrel, and one end of the piston rod is arranged in the cylinder barrel in a sliding manner;

the top cover is sleeved on the piston rod and is used for being in fastening connection with an automobile body;

the cylinder barrel is used for being fixedly connected with a lower swing arm of an automobile suspension.