阅读说明：本技术 用于车辆的悬置 (Suspension for vehicle ) 是由 徐诚园 王建文 曺云起 于 2019-09-27 设计创作，主要内容包括：本发明提供一种用于车辆的悬置,其设置在需要减震性能的部分处,并且通过双头螺栓紧固。用于车辆的悬置包括：凸缘,所述凸缘中插入所述双头螺栓并支撑双头螺栓；隔离件,其配置成包围所述凸缘；壳体,其联接到振动体或支撑体中的另一个,并且隔离件固定到壳体；腔室,其形成在壳体内部作为由壳体和隔离件包围的空间,并且腔室填充有流体。另外,用于车辆的悬置包括减震部件,该减震部件安装在壳体上,以将腔室分成两个空间并设置在腔室中。用于车辆的悬置配置成适当地吸收振动并减少噪音。(The present invention provides a suspension for a vehicle, which is provided at a portion where damping performance is required, and is fastened by a stud bolt. A suspension for a vehicle comprising: a flange into which the stud bolts are inserted and supporting the stud bolts; a spacer configured to surround the flange; a case coupled to the other of the vibration body or the support body, and a spacer fixed to the case; a chamber formed inside the housing as a space surrounded by the housing and the partition, and filled with a fluid. In addition, the suspension for a vehicle includes a shock-absorbing member mounted on the housing to divide the chamber into two spaces and disposed in the chamber. The suspension for a vehicle is configured to appropriately absorb vibration and reduce noise.)

1. A suspension for a vehicle, which is provided at a portion requiring shock absorption and is fastened to one of a vibrating body where vibration or impact occurs and a support body for supporting the vibrating body with a stud bolt, the suspension for a vehicle comprising:

a flange into which the stud bolt is inserted and which supports the stud bolt;

a spacer configured to surround the flange;

a case coupled to the other of the vibration body or the support body, and the spacer is fixed to the case;

a chamber formed inside the housing as a space surrounded by the housing and the partition, the chamber being filled with a fluid; and

a shock-absorbing member mounted on the housing to divide the chamber into two spaces and disposed in the chamber,

wherein the shock-absorbing member includes:

an upper cover formed to have a disk shape as an upper constituent element;

a large-displacement inlet passage provided near the centrifugal center of the upper cover as a hole perforated in the upper cover in the vertical direction;

at least one small-displacement inlet passage provided near the circumference of the upper cover as a hole perforated in the upper cover in a vertical direction;

a lower cover formed to have a circular disk shape as a lower constituent element coupled to a lower side of the upper cover;

a film mounting groove provided near a circumference of the lower cover to communicate with the small-displacement inlet passage and pressed downward from an upper surface of the lower cover;

a large discharge communication groove provided near a centrifugal center of the lower cover to communicate with the large discharge inlet passage and pressed downward from an upper surface of the lower cover;

a flow passage extending to a radially outer side of the lower cover while forming a spiral from the large-displacement communication groove around the large-displacement communication groove and pressed downward from an upper surface of the lower cover;

a large discharge outlet passage perforated in the lower cover in a vertical direction at an end of the flow passage extending to the outside in the radial direction of the lower cover;

at least one small-displacement outlet passage perforated in the lower cover in a vertical direction at a lower end of the film mounting groove; and

a film formed to have a shape corresponding to the film mounting groove, and mounted on the film mounting groove with a gap.

2. The suspension for a vehicle according to claim 1,

the at least one small-displacement inlet passage is formed to have a relatively long length in a circumferential direction of the upper cover.

3. The suspension for a vehicle according to claim 1,

the at least one small-displacement inlet passage is radially formed in the upper cover.

4. The suspension for a vehicle according to claim 3,

the small-displacement inlet passages are arranged at regular intervals in a circumferential direction of the upper cover.

5. The suspension for a vehicle according to claim 1,

a plurality of coupling protrusions protruding upward in the lower cover are inserted and fastened to a plurality of coupling holes perforated in the upper cover in a vertical direction, and are disposed between the large-displacement inlet passage and the small-displacement inlet passage at positions corresponding to the coupling holes, whereby the upper cover and the lower cover are coupled to each other.

6. The suspension for a vehicle according to claim 1,

the upper cover and the lower cover have the same diameter.

7. The suspension for a vehicle according to claim 1,

the membrane mounting groove is formed in a circular shape concentric with the lower cover, and the membrane has an overall annular shape.

8. The suspension for a vehicle according to claim 1,

the flow passage is disposed radially inside the lower cover, compared to the membrane mounting groove.

9. The suspension for a vehicle according to claim 1,

the at least one small-displacement outlet passage is formed to have a relatively long length in a circumferential direction of the lower cover.

10. The suspension for a vehicle according to claim 1,

the at least one small-displacement outlet passage is radially formed in the lower cover.

11. The suspension for a vehicle of claim 10,

the small-displacement outlet passages are arranged at regular intervals in a circumferential direction of the lower cover.

12. The suspension for a vehicle according to claim 1,

the film is formed with:

an inner circumferential track protruding in a vertical direction from an inner circumference of the membrane and extending along the inner circumference of the membrane; and

an outer circumferential rail protruding in a vertical direction from an outer circumference of the film and extending along the outer circumference of the film.

13. The suspension for a vehicle of claim 12,

the inner circumferential track and the outer circumferential track protrude to have the same size.

14. The suspension for a vehicle of claim 12,

the film is formed with:

at least one inner circumferential protrusion protruding from the inner circumferential track in a vertical direction; and

at least one outer circumferential protrusion protruding from the outer circumferential track in a vertical direction.

15. The suspension for a vehicle of claim 14,

the at least one inner circumferential protrusion and the at least one outer circumferential protrusion are radially formed in the film, respectively.

16. The suspension for a vehicle of claim 15,

the inner circumferential protrusions and the outer circumferential protrusions are respectively arranged at regular intervals along a circumferential direction of the membrane.

17. The suspension for a vehicle of claim 15,

each outer circumferential protrusion is formed at a position corresponding to each inner circumferential protrusion along a radial direction of the film.

18. The suspension for a vehicle according to claim 1,

when a large-displacement frequency band vibration occurs, the fluid filled in the chamber sequentially passes through the large-displacement inlet passage, the large-displacement communication groove, the circulation passage, and the large-displacement outlet passage from an upper space of the two divided spaces of the chamber, and then flows into a lower space of the two divided spaces of the chamber.

19. The suspension for a vehicle according to claim 1,

when a small displacement frequency band vibration occurs, the fluid filled in the chamber sequentially passes through the small displacement inlet passage, the membrane mounting groove, and the small displacement outlet passage from an upper space of two divided spaces of the chamber, and then flows into a lower space of the two divided spaces of the chamber.

Technical Field

The present invention relates to a suspension for a vehicle. More particularly, the present invention relates to a suspension for a vehicle having improved dynamic characteristics.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

Generally, a vehicle requires shock absorbing performance to absorb vibration or impact in many parts thereof. For example, the center of gravity of the engine periodically changes to generate considerable vibration due to the lifting motion of the piston and the rotational motion of the connecting rod and the crankshaft interlocked with the piston.

The suspension can be applied to many locations where the vehicle vibrates. Here, the suspension means a device interposed between a structure where vibration or impact is generated and a structure to be supported to absorb the vibration or impact. For example, the suspension is interposed between the engine and the subframe.

However, applicants have found that typical suspensions do not adequately and properly absorb complex vibrations that occur over a wide frequency band.

In other words, in a typical suspension, when fluid is filled in the suspension so that the fluid absorbs vibration or shock, the vibration may not be completely absorbed and excessive noise may be generated due to dynamic characteristics depending on the space ensuring the filling of the fluid. That is, the frequency band in which vibration can be absorbed is not wide. Meanwhile, in the case where the above-described space filled with the fluid therein is divided into two spaces and further includes a membrane for circulating the fluid through communication with the two spaces so that the frequency band in which the vibration can be absorbed is relatively widened, although the whole vibration absorption is improved, noise due to the vibration may be generated.

The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain material that does not form the prior art that is already known in this country to a person skilled in the art.

Disclosure of Invention

The present invention provides a suspension for a vehicle, which can sufficiently and appropriately absorb complex vibrations occurring over a wide frequency band and can reduce the occurrence of noise.

In addition, the present invention provides a suspension for a vehicle, which is provided at a portion requiring shock absorption and is fastened to a vibrating body where vibration or impact occurs or a support body for supporting the vibrating body by means of a stud bolt.

A suspension for a vehicle according to one form of the present invention may include: a flange into which the stud bolt is inserted and which supports the stud bolt; a spacer configured to surround the flange; a case coupled to the other of the vibration body or the support body, and the spacer is fixed to the case; a chamber formed inside the housing as a space surrounded by the housing and the partition, the chamber being filled with a fluid; and a shock-absorbing member mounted on the housing to divide the chamber into two spaces and disposed in the chamber.

The shock-absorbing member may include: an upper cover formed to have a disk shape as an upper constituent element; a large-displacement inlet passage provided near the centrifugal center of the upper cover as a hole perforated in the upper cover in the vertical direction; at least one small-displacement inlet passage provided near the circumference of the upper cover as a hole perforated in the upper cover in a vertical direction; a lower cover formed to have a circular disk shape as a lower constituent element coupled to a lower side of the upper cover; a film mounting groove provided near a circumference of the lower cover to communicate with the small-displacement inlet passage and pressed downward from an upper surface of the lower cover; a large discharge communication groove provided near a centrifugal center of the lower cover to communicate with the large discharge inlet passage and pressed downward from an upper surface of the lower cover; a flow passage extending to a radially outer side of the lower cover while forming a spiral from the large-displacement communication groove around the large-displacement communication groove and pressed downward from an upper surface of the lower cover; a large discharge outlet passage perforated in the lower cover in a vertical direction at an end of the flow passage extending to the outside in the radial direction of the lower cover; at least one small-displacement outlet passage perforated in the lower cover in a vertical direction at a lower end of the film mounting groove; and a film formed to have a shape corresponding to the film mounting groove and mounted on the film mounting groove to have a gap with the film mounting groove.

The at least one small-displacement inlet passage may be formed to have a relatively long length in a circumferential direction of the upper cover.

The at least one small-displacement inlet passage may be radially formed in the upper cover.

The small-displacement inlet passages may be arranged at regular intervals in a circumferential direction of the upper cover.

A plurality of coupling protrusions protruding upward in the lower cover may be inserted and fastened to a plurality of coupling holes perforated in the upper cover in a vertical direction while being disposed between the large-displacement inlet passage and the small-displacement inlet passage at positions corresponding to the coupling holes, whereby the upper cover and the lower cover may be coupled to each other.

The upper cap and the lower cap may have the same diameter.

The film mounting groove may be formed in a circular shape concentric with the lower cover, and the film has an overall annular shape.

The flow passage may be disposed radially inside the lower cover, compared to the membrane mounting groove.

The at least one small-displacement outlet passage may be formed to have a relatively long length in a circumferential direction of the lower cover.

The at least one small-displacement outlet passage may be radially formed in the lower cover.

The small-displacement outlet passages may be arranged at regular intervals in a circumferential direction of the lower cover.

The film may be formed with: an inner circumferential track protruding in a vertical direction from an inner circumference of the membrane and extending along the inner circumference of the membrane; and an outer circumferential track protruding in a vertical direction from an outer circumference of the film and extending along the outer circumference of the film.

The inner circumferential track and the outer circumferential track may protrude to have the same size.

The film may be formed with: at least one inner circumferential protrusion protruding from the inner circumferential track in a vertical direction; and at least one outer circumferential protrusion protruding from the outer circumferential track in a vertical direction.

The at least one inner circumferential protrusion and the at least one outer circumferential protrusion may be radially formed in the film, respectively.

The inner circumferential protrusions and the outer circumferential protrusions may be respectively arranged at regular intervals along a circumferential direction of the membrane.

Each of the outer circumferential protrusions may be formed at a position corresponding to each of the inner circumferential protrusions along a radial direction of the film.

When a large-displacement frequency band vibration occurs, the fluid filled in the chamber may sequentially pass through the large-displacement inlet passage, the large-displacement communication groove, the circulation passage, and the large-displacement outlet passage from an upper space of two divided spaces of the chamber, and then may flow into a lower space of the two divided spaces of the chamber.

When a small displacement frequency band vibration occurs, the fluid filled in the chamber may sequentially pass through the small displacement inlet passage, the membrane mounting groove, and the small displacement outlet passage from an upper space of two divided spaces of the chamber, and then, may flow into a lower space of the two divided spaces of the chamber.

Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

Drawings

In order that the invention may be better understood, its various forms will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic view of a suspension for a vehicle according to one form of the present invention;

FIG. 2 illustrates a perspective view of a shock absorbing member for a suspension of a vehicle according to one form of the present invention;

FIG. 3 illustrates an exploded view of a shock absorbing component for a suspension of a vehicle according to one form of the present invention;

FIG. 4 illustrates a top view of a lower cap of a cushioning component according to one form of the present invention;

FIG. 5 shows an enlarged view of portion "A" of FIG. 3;

FIGS. 6A and 6B are schematic diagrams illustrating a flow of a fluid in a large displacement frequency band through a shock-absorbing member for a suspension of a vehicle according to one form of the present invention; and

fig. 7A and 7B are schematic views illustrating a flow of fluid in a small displacement frequency band through a shock-absorbing member for suspension of a vehicle according to one form of the present invention.

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

Detailed Description

The following description is merely exemplary in nature and is in no way intended to limit the invention or its application or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

FIG. 1 shows a schematic view of a suspension for a vehicle according to one form of the present invention. In addition, fig. 1 is a schematic sectional view for visually showing the structure of a suspension 1 for a vehicle according to one form of the present invention.

As shown in fig. 1, a suspension 1 for a vehicle according to one form of the present invention includes a stud bolt 12, a flange 14, a spacer 16, a housing 20, and a shock absorbing member 100, which are provided in a portion of the vehicle where shock absorbing performance is required to absorb vibration or impact, such as a portion between an engine (not shown) and a sub-frame (not shown).

One end of the stud bolt 12 is fastened to one of a structure (not shown, hereinafter referred to as a vibration body) that causes vibration or impact and a structure (not shown, hereinafter referred to as a support body) that supports the vibration body. The other end of the stud 12 is embedded in the suspension 1.

The flange 14 supports the stud bolts 12. That is, the other end of the stud bolt 12 is inserted into the flange 14 and embedded therein.

A spacer 16 is provided to surround the flange 14. Here, it is apparent to those of ordinary skill in the art (hereinafter, referred to as those of ordinary skill in the art) that the spacer 16 is a material having a function of suppressing transmission of vibration and absorbing vibration. Meanwhile, the flange 14 and the spacer 16 may be formed to have a circular cross section centered on the eccentric center of the stud bolt 12. In addition, the flange 14 has a disk shape capable of being coupled with an object having a conventional shape, and the spacer 16 may be provided in a disk shape surrounding the flange 14.

The housing 20 is a base frame of the suspension 1, which may be coupled with a frame or the like of a vehicle by welding or the like, and the spacer 16 is fixed to the housing 20. Here, the coupling of the case 20 and the separator 16 may be accomplished by various methods by those skilled in the art. For example, portions of the spacer 16 having a circular cross section may be pressed into the housing 20, or a portion of the spacer 16 in a disc shape surrounding the flange 14 may be bonded to the housing 20. Meanwhile, the case 20 is coupled to the vibrating body and the one of the supporting bodies to which the stud bolts 12 are not fastened, and the coupling method thereof may be welding.

The shock absorbing member 100 is mounted on the housing 20. A chamber 22 is formed in the housing 20, the chamber 22 being a space surrounded by the housing 20 and the partition 16. In addition, a shock absorbing member 100 is disposed in the chamber 22. Here, the chamber 22 is filled with a fluid F. In other words, the shock-absorbing member 100 is provided to divide the chamber 22 into two spaces in a state of being immersed in the fluid F, and the shock-absorbing member 100 reduces vibration or impact generated from the vibrating body while the fluid F circulates inside the shock-absorbing member 100 or passes through the shock-absorbing member 100, thereby passing through the two divided spaces of the chamber 22.

Fig. 2 illustrates a perspective view of a shock-absorbing member for a suspension of a vehicle according to one form of the present invention, fig. 3 illustrates an exploded view of the shock-absorbing member for a suspension of a vehicle according to one form of the present invention, fig. 4 illustrates a top view of a lower cover of the shock-absorbing member according to one form of the present invention, and fig. 5 illustrates an enlarged view of "a" portion of fig. 3.

As shown in fig. 2 to 5, the shock-absorbing member 100 includes an upper cover 110, a lower cover 120, and a membrane 130. The upper cap 110 is formed with a large-displacement inlet passage 112, a small-displacement inlet passage 116, and a coupling hole 114. The lower cover 120 is formed with a film mounting groove 121, a large discharge communication groove 122, a flow passage 125, a large discharge outlet passage 128, a small discharge outlet passage 126, and a coupling protrusion 124. The membrane 130 is formed with an inner circumferential track 132, an outer circumferential track 134, an inner circumferential protrusion 136, and an outer circumferential protrusion 138.

The upper cover 110 is an upper constituent element of the shock-absorbing member 100, and when the flange 14, the spacer 16, and the housing 20 are formed to have a circular cross section centered on the eccentric center of the stud bolt 12, the upper cover 110 is preferably formed to have a circular disk shape. Here, it should be understood that although the eccentric center of the stud bolt 12 is set as a reference of the circular cross section, the stud bolt 12 may be eccentrically extended or inclined from the eccentric center of the circular cross section. For convenience of explanation, it is assumed in the following description that the upper cover 110 is formed in a circular disk shape. The upper cover 110 is defined as an upper constituent element of the shock-absorbing member 100, but the actual arrangement thereof may vary.

The large displacement inlet passage 112 is a passage through which the fluid F flows when the vibrating body vibrates in a large displacement frequency band. The large-displacement inlet passage 112 is provided near the centrifugal center of the disc-shaped upper cover 110, which may be a circular hole eccentrically spaced from the centrifugal center of the upper cover 110 and perforated in a vertical direction, for smooth flow of the inflow fluid F.

The small-displacement inlet passage 116 is a passage through which the fluid F flows when the vibration body vibrates in a small-displacement frequency band. In addition, the small-displacement inlet passage 116 is provided near the circumference of the disc-shaped upper cover 110, which may be a hole perforated in the vertical direction of the upper cover 110 to have a relatively long length in the circumferential direction of the upper cover 110. Further, a plurality of small-displacement inlet passages 116 may be radially formed in the disc-shaped upper cover 110, and may be arranged at regular intervals in a circumferential direction of the upper cover 110. For example, six small-displacement inlet passages 116 (see fig. 2) are shown in the drawings, but the present invention is not limited thereto. The distance between the large-displacement inlet passage 112 near the centrifugal center and the centrifugal center, and the distance between the small-displacement inlet passage 116 near the circumference and the circumference may vary according to the design of those skilled in the art, but the large-displacement inlet passage 112 is designed to be relatively closer to the centrifugal center than the small-displacement inlet passage 116, and the small-displacement inlet passage 116 is designed to be relatively closer to the circumference than the large-displacement inlet passage 112.

A plurality of coupling holes 114 are formed in the upper cover 110 in a vertical direction within a range that does not damage durability of the upper cover 110. In addition, a coupling hole 114 is arranged between the large-displacement inlet passage 112 and the small-displacement inlet passage 116.

The lower cover 120 is a lower constituent element of the shock absorbing member 100, and when the upper cover 110 is formed to have a circular disk shape, the lower cover 120 is preferably formed to have a circular disk shape. In addition, the lower cover 120 is coupled to the lower side of the upper cover 110. Here, the upper cap 110 and the lower cap 120 may have the same diameter. Further, the lower cap 120 has a predetermined length in an axial direction of the centrifugal center so that the fluid F can circulate inside the shock absorbing member 100. In other words, the overall shape of the coupling of the lower cap 120 and the upper cap 110 may be a cylindrical shape.

The film mounting groove 121 is pressed downward from the upper surface of the lower cover 120. The membrane installation groove 121 is disposed adjacent to the circumference of the disc-shaped lower cover 120 so as to communicate with the small displacement inlet passage 116, and extends in the circumferential direction of the lower cover 120 to form a circular shape concentric with the lower cover 120.

The large displacement communication groove 122 is pressed downward from the upper surface of the lower cover 120. The large discharge communication groove 122 is provided near the centrifugal center of the disc-shaped lower cover 120 so as to communicate with the large discharge inlet passage 112.

The flow channel 125 is pressed downward from the upper surface of the lower cover 120. The flow passage 125 communicates with the large discharge amount communication groove 122 and extends radially outward along the lower cover 120 while spiraling from the large discharge amount communication groove 122 around the large discharge amount communication groove 122. Here, the flow channel 125 is disposed more inward in the radial direction of the lower cover 120 than the membrane mounting groove 121.

The large discharge outlet channel 128 is a hole perforated in the lower cap 120 in the vertical direction, and is formed at the end of the flow channel 125 extending outward in the radial direction of the lower cap 120. In other words, the fluid F flowing into the shock-absorbing member 100 through the large-discharge-amount inlet passage 112 is discharged through the large-discharge-amount outlet passage 128 after sequentially passing through the large-discharge-amount communicating groove 122 and the communication passage 125.

The small-displacement outlet passage 126 is a hole perforated in the lower cover 120 in the vertical direction, and is formed at the lower end of the film mounting groove 121. In addition, the small-displacement outlet passage 126 is formed to have a relatively long length in the circumferential direction of the lower cover 120. Further, a plurality of small-displacement outlet passages 126 may be radially formed in the disc-shaped lower cover 120, and they may be arranged at regular intervals in the circumferential direction of the lower cover 120. In other words, the fluid F flowing into the shock-absorbing member 100 through the small-displacement inlet passage 116 is discharged through the small-displacement outlet passage 126 after passing through the diaphragm mounting groove 121. For example, ten small displacement outlet passages 126 (see FIG. 4) are shown in the drawings, but the invention is not so limited.

A plurality of coupling protrusions 124 protrude upward from the lower cover 120 at positions corresponding to the coupling holes 114 of the upper cover 110. Here, the position where the coupling protrusion 124 is formed is a position where the film installation groove 121, the large discharge amount communication groove 122, the circulation channel 125, and the like are not formed. In addition, the coupling protrusion 124 is inserted into the coupling hole 114 and fastened to the coupling hole 114, so that the upper and lower covers 110 and 120 are coupled.

The film 130 has an overall annular shape and is mounted on the film mounting groove 121 of the lower cover 120. In addition, the membrane 130 converts vibration or impact generated from a vibration body transmitted through the flow of the fluid F into kinetic energy, thereby canceling (absorbing) the vibration or impact. That is, the film 130 is formed to have a shape corresponding to the film mounting groove 121 with a gap from the film mounting groove 121.

The inner circumferential track 132 protrudes in a vertical direction from the inner circumference of the membrane 130, and extends along the inner circumference of the membrane 130.

The outer circumferential rail 134 protrudes from the outer circumference of the film 130 in a vertical direction and extends along the outer circumference of the film 130. That is, a groove extending along the circumference of the membrane 130 is formed between the inner circumferential track 132 and the outer circumferential track 134. Meanwhile, the inner circumferential track 132 and the outer circumferential track 134 may protrude to have the same size.

Inner circumferential protrusion 136 also protrudes from inner circumferential track 132 in the vertical direction. A plurality of inner circumferential protrusions 136 are radially formed in the film 130, and may be arranged at equal intervals in the circumferential direction of the film 130.

The outer circumferential projection 138 also projects from the outer circumferential track 134 in the vertical direction. A plurality of outer circumferential protrusions 138 are radially formed in the film 130, and may be arranged at regular intervals in the circumferential direction of the film 130. Here, the outer circumferential protrusion 138 is formed at a position corresponding to the inner circumferential protrusion 136 along the radial direction of the film 130. For example, six inner circumferential protrusions 136 and six outer circumferential protrusions 138 (see fig. 3) are shown in the drawings, but the present invention is not limited thereto.

The inner circumferential track 132, the outer circumferential track 134, the inner circumferential protrusion 136, and the outer circumferential protrusion 138 are formed in shapes having dynamic characteristics according to the design of those skilled in the art, and the shapes preferably correspond to the described shapes.

Fig. 6A and 6B are schematic views illustrating a flow of fluid through a shock-absorbing member for suspension of a vehicle according to one form of the present invention in a large displacement frequency band.

As shown in fig. 6A and 6B, when the large displacement band vibration occurs in the vibrating body, the fluid F filled in the chamber 22 passes through the large displacement inlet passage 112, the large displacement communication groove 122, the flow passage 125, and the large displacement outlet passage 128 in order from the upper space of the divided space of the chamber 22, and then flows into the lower space of the two divided spaces of the chamber 22. The large displacement frequency band vibration is cancelled (absorbed) by the flow of the fluid F.

Fig. 7A and 7B are schematic views illustrating a flow of fluid in a small displacement frequency band through a shock-absorbing member for suspension of a vehicle according to one form of the present invention.

As shown in fig. 7A and 7B, when the vibration body vibrates in a small displacement frequency band, the fluid F filled in the chamber 22 sequentially passes through the small displacement inlet passage 116, the membrane mounting groove 121, and the small displacement outlet passage 126 from the upper space of the divided spaces of the chamber 22, and then flows into the lower space of the two divided spaces of the chamber 22. By the flow of the fluid F described above, the small displacement frequency band vibration is eliminated (absorbed). Here, the large displacement band vibration and the small displacement band vibration are opposite to each other, and there may be a portion where the fluid F sequentially passing through the large displacement inlet passage 112, the large displacement communication groove 122, the circulation passage 125, the large displacement outlet passage 128, and the fluid F sequentially passing through the small displacement inlet passage 116, the membrane mounting groove 121, the small displacement outlet passage 126 can all flow.

As described above, according to the form of the present invention, it is possible to reduce noise while maintaining the shock absorbing performance by the suspension in which the fluid is filled and in which the membrane for separating the spaces filled with the fluid F is provided. In addition, the frequency band in which vibration can be absorbed can be expanded. Further, the contact area between the fluid F and the membrane 130 can be reduced, thereby suppressing impact sound when the fluid F strikes the membrane 130 and vibration noise due to vibration of the membrane 130. In addition, an additional structure for absorbing (or reducing) impact sound and vibration noise occurring at the existing membrane is not required, thereby reducing the production cost.

While the invention has been described in connection with what is presently considered to be practical exemplary forms, it is to be understood that the invention is not limited to the disclosed forms, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.