KR20200051328A - Miniaturization air suspension - Google Patents

Abstract

Disclosed in an embodiment of the present invention is a miniaturization air suspension device, which comprises: a shock absorber of which an upper end portion is coupled to a vehicle body and a lower end portion is coupled to a vehicle axis, and which has a cylinder and a piston rod to have a stretchable length to reduce vibration; an upper guide which has a cylindrical shape to accommodate one portion of the shock absorber to be located at the lower side of the upper end portion of the shock absorber, and of which one end portion is provided with a penetration hole through which the piston rod penetrates, wherein an air introduction unit is provided at one side of the one end portion thereof to receive compressed air, and a first storage chamber is formed therein to accommodate the compressed air; a lower guide of a loop shape, which is located at the lower side of the upper guide, and is installed to come in contact with the outer circumferential surface of the cylinder; and a sleeve of which one end portion is detachably coupled to the other end portion of the upper guide, and the other end portion is detachably coupled to the outer circumferential surface of the lower guide, wherein a second storage chamber is formed therein to communicate with the first storage chamber of the upper guide to accommodate the compressed air, and a folding unit is provided to be expanded to have a predetermined diameter or less by the compressed air. Therefore, the present invention can be easily installed in extremely restricted places.

Description

Miniaturized air suspension system {MINIATURIZATION AIR SUSPENSION}

The present invention relates to a miniaturized air suspension device, and more specifically, by allowing the maximum expansion diameter of a sleeve that functions as an air spring to be 85 mm or less, it can be conveniently mounted in a narrow space and does not interfere with surrounding structures. It relates to a miniaturized air suspension device.

Suspension of a vehicle is intended to secure the vehicle's riding comfort and driving stability by absorbing vibrations or shocks generated while driving while supporting the weight of the vehicle body, thereby alleviating vibrations or shocks transmitted to the vehicle body and the driver. Such a suspension device can be installed between the vehicle body and the axle.

In general, the suspension device has a structure in which a coil spring and a shock absorber are combined, and this suspension device provides an improved ride comfort to the occupant through a complementary action between the coil spring and the shock absorber.

However, in the case of a suspension device composed of a coil spring and a shock absorber, the characteristics of the suspension device cannot be freely changed as required due to the characteristics of the coil spring made of spring steel, and the ride comfort is changed as the loading load of the vehicle or the number of occupants changes. There is a problem that a significant difference occurs.

Recently, in order to improve the above-mentioned problems, air suspension using an air spring instead of a coil spring has been applied to luxury cars and large cars.

The air suspension is composed of a combination of an air spring and a shock absorber, where the air spring and shock absorber are assembled together to form a single structure, if necessary, and the air spring and shock absorber are installed separately. It also becomes.

For reference, Korean Patent Publication No. 10-2009-0082819 discloses an air suspension applied to a front wheel of a vehicle, and Korean Patent Publication No. 10-2011-0139607 discloses an air spring applied to a rear wheel of a vehicle. .

As described above, in the conventional air suspension, the air spring using the compression characteristics of air supports the vehicle body and can absorb small vibrations transmitted to the vehicle body, and can obtain a similar ride comfort regardless of the occupant and vehicle weight change. There are advantages.

However, the conventional air suspension can adjust the spring coefficient by adjusting the pressure of the air when the air spring is in normal operation, but when the air spring fails, there is no other supporting means capable of supporting the vehicle body. Suddenly, a situation in which a vehicle may not be able to drive is not only possible, but also if the vehicle is in a high-speed driving state, it is difficult to control the driving as the garage is lowered instantaneously, causing problems in life and property. have.

In addition, the conventional air suspension is a core part of the air spring, and since the sleeve for storing air is made of elastically deformable rubber material, the diameter of the sleeve is greatly expanded by compressed air. Interfering problems occur.

Korean Patent Publication No. 10-2009-82819 (published on July 31, 2009) Korean Patent Publication No. 10-2011-139607 (published on December 29, 2011)

The present invention is to solve the conventional problems as described above, the purpose of which is an air spring that can be applied in parallel with the coil spring so that the vehicle body is minimally supported through the coil spring installed in the existing vehicle even if the air spring fails. It is to provide a miniaturized air suspension device having a function.

Accordingly, the present invention can be easily installed in a narrow space ultimately for parallel application with an existing coil spring, and after installation, the maximum expansion diameter of the sleeve is within a set range so as not to interfere with surrounding structures or other parts. It is to provide a miniaturized air suspension device limited in the.

According to an embodiment of the present invention, the upper end is coupled to the vehicle body, the lower end is coupled to the axle, provided with a cylinder and a piston rod shock absorber to dampen the vibration as the length is stretched; It is made of a cylindrical shape to accommodate a part of the shock absorber, but is located below the upper end of the shock absorber, and a through hole through which the piston rod penetrates is formed at one end, and compressed air is provided at one end of the shock absorber. The air inlet is provided, the upper guide is formed inside the first storage chamber for receiving the compressed air; A lower guide in the form of a ring located below the upper guide and installed in close contact with an outer circumferential surface of the cylinder; And one end is detachably coupled to the other end of the upper guide, the other end is detachably coupled to the outer circumferential surface of the lower guide, there is formed a second storage chamber in communication with the first storage chamber of the upper guide inside And a sleeve configured to receive the compressed air and provided with a fold so that the compressed air expands to a predetermined diameter or less, wherein the sleeve is elastically deformable by the compressed air, and includes at least two layers. Synthetic resin is configured to be arranged to be spaced apart from each other; And a plurality of cord wires extending along the circumferential direction of the sleeve between each layer of the synthetic resin portion to limit expansion of the synthetic resin portion beyond a predetermined diameter. have.

Here, the cord wire is made of an inelastic material, and its length may be set so that the sleeve does not expand beyond a diameter of 85 mm.

In addition, a first toothed portion is formed at the other end of the upper guide and one end of the sleeve to increase the bonding force, and the first end of the sleeve is tightened to maintain the bonding force of the first toothed portion on the outer circumferential surface of the one end of the sleeve. Clamps can be installed.

In addition, a second toothed portion is formed on the outer circumferential surface of the lower guide and the other end of the sleeve to increase the bonding force, and the other end of the sleeve is tightened on the outer circumferential surface of the other end of the sleeve to maintain the bonding force of the second toothed portion. Two clamps are installed, and the second clamp can be disposed inside the sleeve.

In addition, at least one airtight ring may be installed at the through hole of the upper guide so that airtightness is maintained between the piston rod.

In addition, at least one airtight ring may be installed on the inner circumferential surface of the lower guide so that airtightness is maintained between the cylinder and the cylinder.

In addition, the piston rod and the cylinder may be accommodated to be spaced apart from the inner wall of the upper guide so as not to be in close contact with the inner wall of the upper guide.

According to the embodiment of the present invention, since the air suspension device is miniaturized, it can be applied in parallel with an existing coil spring even in a narrow space of a vehicle. Accordingly, while maintaining a feeling of ride by the air spring function, even if the air suspension fails, the garage Since it is not rapidly lowered and the vehicle body is supported through the existing coil spring, there is an advantage of improving driving stability.

In addition, according to the embodiment according to the present invention, since the sleeve for storing compressed air in the air suspension is miniaturized to expand only within a predetermined diameter without being infinitely expanded by air, the air suspension can be easily mounted even in a narrow space. There is an advantage that the air suspension does not interfere with surrounding structures or other parts even after mounting.

1 is a perspective view showing the appearance of a miniaturized air suspension device according to an embodiment of the present invention.
2 is a cross-sectional side view for explaining the configuration of a miniaturized air suspension device according to an embodiment of the present invention.
3 is a functional state diagram showing the change of the sleeve when the compressed air is supplied in the state of Figure 2;
4 is an exploded view showing an exploded view of each configuration of a miniaturized air suspension device according to an embodiment of the present invention.
5 is an enlarged cross-sectional view of the upper guide in FIG. 4.
6 is an enlarged cross-sectional view of the lower guide in FIG. 4.
7 is an enlarged cross-sectional view of the sleeve in FIG. 4.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to an embodiment of the present invention. The following description is one of several aspects of the present invention that can be patented, and the following description may form part of the detailed description of the present invention.

However, specific descriptions of well-known configurations or functions in describing the present invention may be omitted to clarify the present invention.

The present invention can be applied to various changes and may include various embodiments, and specific embodiments will be illustrated in the drawings and described in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the corresponding components are not limited by these terms. These terms are only used to distinguish one component from another.

When a component is said to be 'connected' or 'connected' to another component, it is understood that other components may be directly connected to or connected to the other component, but other components may exist in the middle. It should be.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

Hereinafter, a miniaturized air suspension device 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 to 4, the miniaturized air suspension device 10 according to an embodiment of the present invention is largely upholstered 100, the upper guide 200, the lower guide 300 and the sleeve 400 It can be configured to include.

The fact that an embodiment of the present invention includes the components listed above does not mean that the components are composed of only those components, but that these components are basically included, and may include other components (for example, well-known techniques widely known in air suspension). Although it means that it may, the detailed description of the known technology will be omitted because it may obscure the subject matter of the present invention.

The air suspension device 10 according to an embodiment of the present invention absorbs vibrations or shocks transmitted from the road surface through the axle when driving the vehicle between the vehicle body and the axle, and further functions to maintain the balance of the vehicle body. To improve the driving stability and ride comfort of the vehicle.

Typically, the vehicle is provided with an elastic means (e.g., coil spring) that performs a buffering action against an external shock and a shock absorber that dampens the vibration of the elastic means, and the present invention provides the existing elasticity already installed in the vehicle. By minimizing the air suspension device according to the present invention, the air suspension device 10 according to the present invention is installed in place where the existing shock absorber is installed instead, and the miniaturized air suspension device can be applied in parallel to the existing coil spring even in a narrow space of the vehicle ( 10) is provided.

In addition, the present invention is characterized in that even when compressed air is supplied when performing the function of the air spring, the sleeve 400 is not infinitely expanded and the maximum expansion diameter is limited within a preset range.

Hereinafter, the main configuration of the miniaturized air suspension device 10 according to the present invention will be described in detail.

First, the shock absorber 100 has the same configuration as a conventional shock absorber applied to a vehicle, and the upper part 101 of the shock absorber 100 is coupled to the vehicle body, and the lower part 102 is coupled to the axle. Can be.

At this time, the upper end 101 and the lower end 102 of the shock absorber 100 may be combined opposite to each other as necessary, for example, the upper end 101 of the shock absorber 100 is coupled to the axle and the lower part ( 102) may be coupled to the vehicle body.

The shock absorber 100 includes a cylinder 110 and a piston rod 120 as shown in FIGS. 1 to 3, and the piston rod 120 is withdrawn from the cylinder 110 or the cylinder for vibration damping. The entire length can be stretched as it is inserted into the (110). As described above, vibrations transmitted from the outside may be attenuated through a stretching motion in which the entire length of the shock absorber 100 is increased or shortened. Since the shock absorber 100 corresponds to a generally well-known technology, further detailed description is omitted.

On the other hand, the upper guide 200 is made of a substantially cylindrical shape to accommodate a part of the shock absorber 100, as shown in FIGS. 2 and 3, the upper part 101 of the shock absorber 100 Can be placed under. For example, the upper guide 200 is positioned below the vehicle body to which the upper end 101 of the shock absorber 100 is coupled.

The structure and configuration of the upper guide 200 is shown in detail in FIG. 5, and referring to FIG. 5, the piston rod of the shock absorber 100 is mounted on one end (upper part) of the upper guide 200. A through hole 210 through which the 120 may pass may be formed.

The piston rod 120 of the shock absorber 100 accommodated inside the upper guide 200 through the through hole 210 may be exposed to the outside of the upper guide 200 to be coupled to the vehicle body.

At this time, at least one airtight ring R may be installed in the through hole 210 so that compressed air does not leak between the piston rod 120 and airtightness is maintained. Referring to FIG. 5, a ring groove 211 is formed to be spaced apart at a predetermined interval in the through hole 210 so that the hermetic ring R can be installed.

In addition, an air inlet 220 for receiving compressed air from the outside may be provided at one side of one end of the upper guide 200. The air inlet 220 may be connected to an air supply means (eg, an air compressor or an air tank) provided separately in the vehicle to supply compressed air received from the air supply means to the interior of the upper guide 200.

Specifically, the air inlet 220 is in communication with the inner flow path 221 formed inside the one end of the upper guide 200, and the inner flow path 221 so as to be exposed to the outside of the upper guide 200 An air port 222 protruding from one side of the circumferential surface of the upper guide 200 may be included.

The inner flow path 221 is a configuration that communicates the outside and the inside of the upper guide 200 to supply the compressed air provided from the outside of the upper guide 200 to the interior of the upper guide 200, shown in Figure 5 As described above, the inner flow path 221 is formed in an “L” shape to change directions.

In addition, the air port 222 is exposed to the outside of the upper guide 200 as shown in Figure 1 to be connected to an air hose or air pipe connected to an air supply means (not shown), the internal flow path 221 It is in communication with the compressed air received from the air supply means can be supplied to the interior of the upper guide 200 through the inner flow path (221).

In addition, a first storage chamber 230 capable of receiving the compressed air supplied may be formed inside the upper guide 200. At this time, the first storage chamber 230 may be filled with compressed air, and as shown in FIGS. 2 and 3, the piston rod 120 and the cylinder 110 of the shock absorber 100 may be accommodated. have.

The piston rod 120 and the cylinder 110 may be accommodated at a predetermined interval so as not to be in close contact with the inner wall of the upper guide 200, the compressed air filled in the first storage chamber 230 through this space Can be moved toward the sleeve 400.

In addition, the lower guide 300 is located below the upper guide 200, as shown in Figures 2, 3 and 6, on the outer peripheral surface of the cylinder 110 of the shock absorber 100 It can be installed in a circumferential direction to be in close contact with the cylinder 110.

The lower guide 300 may be configured in a ring shape to be installed on the outer circumferential surface of the cylinder 110. The lower guide 300 secures the other end of the sleeve 400 onto the cylinder 110, and the compressed air supplied to the sleeve 400 is external to the outside through a gap formed between the cylinder 110. It can perform the function of preventing leakage.

Therefore, as shown in FIG. 3, at least one airtight ring R may be installed on the inner circumferential surface of the lower guide 300 to maintain airtightness between the cylinder 110. Referring to FIG. 6, a ring groove 301 is formed to be spaced apart from the inner circumferential surface of the lower guide 300 so that the hermetic ring R can be installed.

Meanwhile, the sleeve 400 may receive compressed air from the first storage chamber 230 of the upper guide 200 and store the compressed air therein. One end of the sleeve 400 is detachably coupled to the other end of the upper guide 200, as shown in Figures 2 and 3, so, if necessary, the sleeve 400 and the upper guide 200 are mutually Disassembly and assembly are possible.

When the sleeve 400 and the upper guide 200 are mutually coupled, the first teeth 201,401 for increasing the bonding force so that the sleeve 400 and the upper guide 200 are not separated from each other by air pressure of compressed air ) May be formed on the other end of the upper guide 200 and one end of the sleeve 400, respectively.

Specifically, as illustrated in FIGS. 2 and 3, a first teeth 201 is formed on the outer circumferential surface of the other end of the upper guide 200, and a sleeve 400 facing the first teeth 201 On the inner circumferential surface of one end portion, another first tooth portion 401 engaged with the first tooth portion 201 is formed so that the first tooth portions 201 and 401 are engaged with each other so that high air pressure is applied to the sleeve 400. When this acts, the sleeve 400 and the upper guide 200 can be prevented from sliding and separating from each other.

In addition, a first clamp 410 for tightening and compressing one end of the sleeve 400 in the center direction with respect to the circumferential direction may be installed on the outer circumferential surface of the sleeve 400 to maintain the coupling force of the first teeth 201 and 401. have.

In addition, the other end of the sleeve 400 is detachably coupled to the outer circumferential surface of the lower guide 300. Accordingly, if necessary, the sleeve 400 and the lower guide 300 can be disassembled and assembled with each other.

Specifically, as illustrated in FIGS. 2, 3, and 6, second teeth 302 and 402 for increasing the bonding force may be formed on the outer circumferential surface of the lower guide 300 and the inner circumferential surface of the other end of the sleeve 400, respectively. have. The second teeth 302 and 402 are formed for the purpose of increasing the bonding force so that the sleeve 400 and the lower guide 300 are not separated from each other by the air pressure of the sleeve 400 like the first teeth 201 and 401 described above. Can be.

In addition, a second clamp 420 is installed on the outer circumferential surface of the other end of the sleeve 400 by tightening the other end of the sleeve 400 in the center direction with respect to the circumferential direction so that the coupling force of the second teeth 302 and 402 is maintained. Can be. At this time, the second clamp 420 may be disposed inside the sleeve 400.

As such, the upper guide 200 is coupled to one end of the sleeve 400 to prevent compressed air from leaking toward one end of the sleeve 400, and the lower guide 300 is provided at the other end of the sleeve 400. Combined, compressed air is prevented from leaking toward the other end of the sleeve 400.

Meanwhile, a second storage chamber 430 in communication with the first storage chamber 230 of the upper guide 200 may be formed inside the sleeve 400. The second storage chamber 430 is configured to receive compressed air from the first storage chamber 230 and receive the compressed air.

2 and 3, the second storage chamber 430 may have a variable volume depending on the air pressure of the compressed air. As shown in FIG. 2, when the compressed air is not supplied, the sleeve 400 contracts. As shown in FIG. 3, when compressed air is supplied, the sleeve 400 is expanded by its air pressure to expand its diameter.

The sleeve 400 may be provided with a folding portion 440 to be expandable within a predetermined diameter (eg, a diameter of 85 mm or less) by compressed air. The folding part 440 extends toward the lower end 102 from the upper end 101 of the shock absorber 100 to the lower end 102 as the sleeve 400 having a predetermined thickness is bent as shown in detail in FIG. 3. It may be formed in a direction changing portion, which extends by a predetermined length toward the upper end 101 of the shock absorber 100 by switching again.

Accordingly, the folded portion 440 may be folded as shown in FIG. 2 by the amount and pressure of compressed air, or expanded as shown in FIG. 3 to allow the diameter of the sleeve 400 to expand within a preset range.

In this way, the sleeve 400 may be made of an elastically deformable material so that the sleeve 400 can act as an air spring while being contracted or expanded by compressed air.

However, the sleeve 400 should not be expanded indefinitely by compressed air, but can be conveniently mounted in a narrow space and, after mounting, should be configured to be expandable within a predetermined diameter so as not to interfere with surrounding structures when expanded. . Accordingly, the sleeve 400 may include a synthetic resin portion 450 and a cord wire 460.

Referring to FIG. 7, the synthetic resin part 450 is configured to be elastically deformable by compressed air, wherein the synthetic resin material is a mixture of CR (chloroprene rubber series) and SBR (styrene-butane rubber series). Can be.

The synthetic resin part 450 configured as described above is provided to form at least two layers as illustrated in FIG. 7, and each layer may be disposed to be spaced apart from each other at a predetermined interval.

In addition, the cord wire 460 is a configuration to limit the expansion of the synthetic resin portion 450 so that the synthetic resin portion 450 does not expand indefinitely by an external force but expands only within a predetermined diameter, and the cord wire 460 ) May be installed between each layer of the synthetic resin part 450.

A plurality of cord wires 460 are provided, and any one of the cord wires 460 extends along the circumferential direction of the sleeve 400 so that the synthetic resin portion 450 of the sleeve 400 extends beyond a predetermined diameter. Can be suppressed.

In addition, each of the cord wires 460 extending in the circumferential direction is disposed along the height direction of the sleeve 400 to prevent the sleeve 400 from which the compression pressure acts from extending beyond a predetermined diameter.

Here, the cord wire 460 extending in the circumferential direction of the sleeve 400 is made of an inelastic material so that the sleeve 400 does not extend beyond a predetermined diameter (for example, a diameter of 85 mm), and its length is set Can be.

As a result of testing under various vehicle conditions, if the maximum expansion diameter inflated by compressed air does not exceed 85 mm, the sleeve 400 may expand to the surrounding structure or other device even if the sleeve 400 expands to the maximum while mounted in the vehicle. And does not interfere.

As described above, the present invention has been described using preferred embodiments, but the scope of rights of the present invention is not limited to the specific embodiments described, and any person having ordinary knowledge in the art may be within the scope of the present invention. Substitution and modification of components are possible, and this also belongs to the rights of the present invention.

10: miniaturized air suspension device according to the present invention
100: shock absorber
110: cylinder 120: piston rod
200: upper guide
201: first tooth portion 210: through hole
220: air inlet 221: internal flow path
222: air port 230: first storage room
300: lower guide
301: ring groove 302: second teeth
400: sleeve
401: first tooth portion 402: second tooth portion
410: first clamp 420: second clamp
430: second storage room 440: folded portion
450: Synthetic resin part 460: Cord wire

Claims (4)

An upper shock absorber coupled to the vehicle body, a lower shock absorber coupled to the axle, and provided with a cylinder and a piston rod to attenuate vibration as the length expands and contracts;
It is made of a cylindrical shape to accommodate a part of the shock absorber, but is located below the upper end of the shock absorber, and a through hole through which the piston rod penetrates is formed at one end, and compressed air is provided at one end of the shock absorber. The air inlet is provided, the upper guide is formed inside the first storage chamber for receiving the compressed air;
A lower guide in the form of a ring located below the upper guide and installed in close contact with an outer circumferential surface of the cylinder; And
One end is detachably coupled to the other end of the upper guide, the other end is detachably coupled to the outer circumferential surface of the lower guide, and a second storage chamber in communication with the first storage chamber of the upper guide is formed therein. It is configured to receive compressed air, the sleeve provided with a folded portion to be expanded to a predetermined diameter or less by the compressed air; includes,
The sleeve
A synthetic resin part that is elastically deformable by the compressed air, and is configured to form at least two layers to be spaced apart from each other; And
A plurality of cord wires extending along the circumferential direction of the sleeve between each layer of the synthetic resin portion to limit expansion of the synthetic resin portion beyond a predetermined diameter;
A miniaturized air suspension device comprising a. According to claim 1,
The cord wire is made of an inelastic material, characterized in that the length is set so that the sleeve does not expand beyond a diameter of 85mm, miniaturized air suspension device. According to claim 1,
The first end portion for increasing the coupling force is formed at the other end of the upper guide and one end of the sleeve,
A first clamp for tightening one end of the sleeve is installed on an outer circumferential surface of the one end of the sleeve so that the coupling force of the first tooth is maintained. According to claim 1,
A second toothed portion is formed on the outer circumferential surface of the lower guide and the other end of the sleeve to increase the bonding force, respectively.
On the outer circumferential surface of the other end of the sleeve, a second clamp is installed to tighten the other end of the sleeve so that the coupling force of the second teeth is maintained, and the second clamp is disposed inside the sleeve, miniaturized air Suspension device.

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