JPH053683U - Mount rubber structure - Google Patents

Abstract

(57) [Abstract] [Purpose] As a mount rubber structure of the connecting part between the upper end of the strut whose lower end is connected to the wheel and the vehicle body, it has a simple structure while ensuring the damping function accompanying the flow of liquid. It is intended to provide a mount rubber structure. [Structure] An inner cylinder 16 to which an upper end portion of a piston rod 6b constituting a strut is fixed, an outer cylinder 17 arranged concentrically with the inner cylinder 16, and a rubber 19 connecting the inner and outer cylinders 16 and 17. , A pair of liquid chambers 21a and 21b whose volumes change due to the deformation of the rubber 19 and orifices 22 and 22 that communicate the liquid chambers 21a and 21b with each other constitute a liquid sealing bush unit 14, and the liquid sealing bush unit 14 is The upper end of a coil spring 7 arranged concentrically around the outer periphery of the strut is received and integrated into an upper coil sheet 12 connected to the vehicle body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a connecting portion between a vehicle body and an upper end portion of a strut whose lower end portion is connected to a wheel side. The structure of the mount rubber provided in the.

[0002]

[Prior art]

  Generally, a damper is provided between a vehicle body and a wheel of an automobile and a damping action of a damper and a coil are provided. With the anti-vibration function of the spring, the transmission of vibrations and impacts from the wheel side to the vehicle body is mitigated. The lower end is connected to the wheel side as a suspension device for quick damping. And a damper whose upper end is supported by the vehicle body, and a damper which is concentric with the outer periphery of the damper. Strut-type suspension devices with worn coil springs are known. It

[0003]   And on the damper in the strut type suspension device as described above. As a mount structure of a connecting portion between an end portion and a vehicle body, for example, Japanese Patent Laid-Open No. 2-275130 According to the publication, an outer cylinder metal fitting as a mounting metal fitting attached to the vehicle body side, and a damper The upper and lower ends of the piston rod of the And to seal the incompressible liquid in the space formed between these rubber elastic bodies. An inserted upper support for suspension is disclosed, which states that rubber It is connected to the inner cylinder fitting by the vibration-proofing action of the elastic body and the damping action accompanying the flow of liquid. Wheel vibration transmitted to the vehicle body side via the damper Will be attenuated.

[0004]

[Problems to be solved by the device]

  By the way, in the above upper support, the outer cylinder fitting is connected to the vehicle body side. It is configured as a mounting bracket, which makes its shape complicated and A plurality of rubbers form a liquid chamber between the outer cylinder and the inner cylinder connected to the damper. For this reason, the dampers that make up the strut suspension system The mount structure of the connecting portion between the end portion and the vehicle body has an extremely complicated structure.

[0005]   Therefore, in the present invention, the upper end of the strut whose lower end is connected to the wheel side is placed on the vehicle body side. As a mount rubber structure to be connected, ensure a damping mechanism due to the flow of liquid It is an object of the present invention to provide a mount rubber structure having a simple structure.

[0006]

[Means for Solving the Problems]

  In order to solve the above problems, the present invention is configured as follows. .

[0007]   First, a device according to claim 1 of the present application (hereinafter, referred to as a first device) is a wheel having a lower end portion. Mount rubber provided at the connection between the upper end of the strut and the vehicle body In the structure of, the upper end of the piston rod of the cylinder that constitutes the strut is The inner cylinder to be fixed, the outer cylinder arranged concentrically with the inner cylinder, and the inner and outer cylinders are connected to each other. The elastic body deforms due to the relative displacement between the elastic body and the inner and outer cylinders, and the volume increases or decreases. Liquid enclosing with a pair of liquid chambers and an orifice for flowing the liquid between the pair of liquid chambers The bush unit is constructed and arranged around the outer periphery of the strut concentrically. An upper coil sheet that receives the upper end of the coil spring placed and is joined to the vehicle body The outer cylinder of the liquid-filled bush is integrated into the inner peripheral surface of the And

[0008]   The invention according to claim 2 of the present application (hereinafter referred to as the second invention) is the first invention. In addition to the above configuration, the liquid filled bush unit for the upper coil sheet When the inner cylinder is relatively displaced in the axial direction by a predetermined amount or more, the upper and lower surfaces of the upper coil sheet and And a stopper that comes into contact with the lower surface are provided.

[0009]

[Action]

  According to the first invention, the upper end portion of the piston rod of the cylinder forming the strut is The inner cylinder to be fixed, the outer cylinder arranged concentrically with the inner cylinder, and the inner and outer cylinders are connected to each other. The elastic body is deformed by the relative displacement of the elastic body and the inner and outer cylinders, and the volume is increased or decreased. A liquid-filled bush with a pair of liquid chambers and an orifice for flowing the liquid between the pair of liquid chambers. Upper unit that is connected to the vehicle body. By being integrated into the coil sheet, it is transmitted through the struts. Liquid mounter equipped with a damping mechanism to suppress or damp the wheel vibrations The bar structure will be constructed. In this way, the unitized liquid-filled With a very simple configuration in which the shoe is incorporated into the upper coil sheet alone, Constructing a mount rubber structure at the connection between il spring or strut and vehicle body can do.

[0010]   Particularly, according to the second aspect of the invention, a liquid-filled bush unit for the upper coil sheet is used. Upper coil sheet when the inner cylinder of the seat is displaced relative to the axial direction by a predetermined amount or more. Since there is a stopper that comes into contact with the upper or lower surface of the The size between the upper coil sheet and the inner cylinder of the liquid-filled bush unit Relative displacement, in other words, between the inner cylinder and the outer cylinder that form the liquid-filled bush unit. Large relative displacement is suppressed, which suppresses extreme deformation of the elastic body. Is controlled and liquid leakage is reliably prevented, improving durability and reliability. Will be improved.

[0011]

【Example】

  Embodiments of the present invention will be described below with reference to the drawings.

[0012]   FIG. 1 is a vehicle suspension system to which a mount rubber structure according to the present invention is applied. 1 shows an example of a suspension device 1 of the first and second upper parts. -Arms 2, 3 and first and second lower arms 4, 5 are arranged in the vertical direction of the vehicle body. Strut 6 and a coil spring arranged coaxially around the outer periphery of the strut 6 7, and the first and second upper arms 2 and 3 and the first and second lower arms 4 and 5, the wheel support member 9 for rotatably supporting the wheel 8 is attached to the vehicle body frame 10. It is swingably connected.

[0013]   The strut 6 is slidable in the cylinder 6a and the cylinder 6a. It is composed of a piston rod 6b connected to an internal piston (not shown). While the lower end of the cylinder 6a is connected to the first lower arm 4, The upper end of the piston rod 6b projecting upward from the cylinder 6a is A mounting bolt that receives the upper end of the spring 7 and is attached to the so-called suspension tower portion 11 of the vehicle body. 12 'and 12' (see FIG. 3) are connected to the fixed upper coil sheet 12. It is tied. Further, the upper coil shield is placed at a predetermined position of the cylinder 6a. The lower coil sheet 13 for receiving the coil spring 7 is fixedly attached to the seat 12. The strut 6 and the coil spring 7 absorb the vibration between the wheel 8 and the vehicle body. It is designed to be collected and attenuated.

[0014]   Next, the upper end of the piston rod 6b constituting the strut 6 and the upper coil are Explaining the structure of the mount portion that connects with the seat 12, this mount As shown in FIG. 2, the parts are basically the above upper coil sheet 12 and the above A liquid-filled bush unit 14 to which the upper end of the piston rod 6b is connected, It is composed of a partial stopper 30 and a lower stopper 40.

[0015]   The liquid-filled bush unit 14 has a structure as shown in FIGS. The upper end of the piston rod 6b is inserted through the shaft core, and the upper end is The inner cylinder 16 made of metal fixed by the belt 15 and arranged concentrically with the inner cylinder 16. A metal outer cylinder 17 and a metal integrally fitted and fixed to the central portion of the inner cylinder 16 in the axial direction. A stopper 18 made of metal or resin and the stopper 18 covered and A rubber 19 as an elastic body that elastically connects the cylinder and the outer cylinder 17 is provided. A seal rubber 20 is integrally attached to the inner peripheral surface of the outer cylinder 17, and the seal rubber 20 -A pair of liquid chambers 21 arranged between the rubber 20 and the rubber 19 so as to face each other in the longitudinal direction of the vehicle body. a and 21b are formed, and the liquid chambers 21a and 21b are formed in the inner cylinder 1 6 and the stopper 18 communicate with each other by a pair of orifices 22, 22 formed. As a result, the rubber 19 is changed due to the relative displacement between the inner cylinder 16 and the outer cylinder 17. Depending on the shape, the liquid may flow between the liquid chambers 21a and 21b through the pair of orifices 22 and 22. It flows and generates a damping force in the longitudinal direction of the vehicle body.

[0016]   Further, a disc-shaped upper stopper 30 is integrally attached to the upper end of the inner cylinder 16. The upper coil shield is attached to the outer periphery of the lower surface of the upper stopper 30. The stopper rubber 30a is integrally formed so as to face the upper flange 12a of the belt 12. Is attached to.

[0017]   A disc-shaped lower stopper 40 is integrally attached to the lower end of the inner cylinder 16. The lower flap of the outer cylinder 17 is mounted so as to face the stopper 40. A stopper rubber 40a is attached to the lower surface of the lunge 17a.

[0018]   Then, as shown in FIG. 2, liquid is sealed in the upper coil sheet 12. The outer cylinder 17 of the bush unit 14 is integrally assembled by an appropriate fixing method. After being covered, the lower stopper 40 and the inside of the liquid sealing bush unit 14 The cylinder 16 is inserted into the upper end of the piston rod 6b, and the upper stopper 30 is further inserted. Will be done.

[0019]   As shown in FIGS. 4 and 5, the stopper 18 covered with the rubber 19 is used. By contacting the seal rubber 20, the inner cylinder 16 and the outer cylinder 17 are separated from each other. It is designed to prevent large relative displacement in the direction perpendicular to the axis, and As shown in FIG. 5, the inner and outer cylinders 16 and 17 are relatively displaced in the vertical direction, that is, the axial direction. Even in this case, the stopper 18 vibrates up and down, so that the liquid chambers 21a, The liquid flows in 21b, and a damping force is generated. Also above the bottom A bump stopper 23 made of rubber is mounted between the stopper 40 and the cylinder 6a. Has been done.

[0020]   According to the above configuration, the vertical vibration of the wheel transmitted via the strut 6 is suppressed. Or the inner cylinder 16 which is attenuated and constitutes the liquid-filled bush unit 14, The outer cylinder 17 and the outer cylinder 16 are displaced in the front-rear direction of the vehicle body, that is, the inner cylinders 16 and 17 are displaced in a direction perpendicular to the axis. During transmission of vibration, a pair of orifices 22 and 22 are provided between the liquid chambers 21a and 21b. The liquid flows, and the damping action caused by it also dampens the vibration. Will be done. In particular, the volume of each of the liquid chambers 21a and 21b, the pair of orifices By appropriately setting the passage diameters of the liquid chambers 22 and 22, the liquid chambers 21a and 21a b and the input vibration of the damping mechanism composed of a pair of orifices 22, 22 Due to the resonance action, the liquid filled bush unit 14 for a predetermined input vibration frequency It is possible to suppress the rise of the dynamic spring constant of the vehicle, which allows road noise, etc. It is possible to effectively suppress or damp high frequency microvibration.

[0021]   The outer cylinder 17 of the liquid-filled bush unit 14 is connected to the vehicle body. The strut 6 by being integrally incorporated into the upper coil sheet 12 Filled with a damping mechanism that suppresses or dampens the wheel vibrations transmitted via A formula mount rubber structure will be constructed. In this way, it is unitized Just install the liquid-filled bush unit 14 into the upper coil sheet 12. Due to the extremely simple structure, the coil spring 7 or the strut 6 and the vehicle body are connected to each other. A mount rubber structure can be configured.

[0022]   Further, a predetermined axial direction of the inner cylinder 16 in the liquid sealing bush unit 14 is set. Abutting on the upper surface or the lower surface of the upper coil sheet 12 when the relative displacement is more than a certain amount Since the part stopper 30 and the lower part 40 are provided, these stoppers 30, 40 in the upper coil sheet 12 and the liquid-filled bush unit 14 A large relative displacement with the cylinder 16, in other words, the liquid-filled bush unit 14 The large relative displacement between the inner cylinder 16 and the outer cylinder 17 constituting the As a result, the extreme deformation of the rubber 19 is suppressed and liquid leakage is surely prevented. As a result, durability and reliability are improved.

[0023]   FIG. 6 shows another embodiment of the liquid-filled bush unit. In the liquid filled bush unit 54 in the embodiment, the piston rod 6 is attached to the shaft core portion. a metal inner cylinder 56 into which the upper end of b is inserted and fixed to this upper end; It is arranged concentrically with the cylinder 56 and integrally with the inner peripheral surface of the upper coil sheet 12. The metallic outer cylinder 57 to be incorporated and the inner cylinder 56 are integrally fitted to the central portion in the axial direction. The fixed metal or resin stopper 58 and the stopper 58 are covered. The rubber 59 as an elastic body that elastically connects the inner cylinder 56 and the outer cylinder 57 to each other. And a seal rubber 60 is integrally attached to the inner peripheral surface of the outer cylinder 57. Between the seal rubber 60 and the rubber 59 of FIG. A pair of liquid chambers 61a and 61b are formed, and these liquid chambers 61a and 61b are formed. Is a pair of orifices formed by removing a part of the seal rubber 60. And the inner cylinder 56 and the outer cylinder 57 relative to each other. Due to the deformation of the rubber 59 due to the displacement, the liquid chambers are passed through the pair of orifices 62, 62. The liquid is configured to flow between 61a and 61b to generate a damping force. is there.

[0024]   Therefore, even in the liquid-filled bush unit 54, the liquid of the first embodiment is also used. The same action or effect as the body-enclosed bush unit 14 can be obtained.

[0025]

[Effect of device]

  As described above, in both the first and second inventions, a unitized liquid sealing The only requirement is to insert the bush into the upper coil sheet that is joined to the vehicle body. With a simple and simple structure, the coil spring or strut is connected to the vehicle body at the joint. The untravers structure does not suppress wheel vibration transmitted through the struts. A liquid-filled mount rubber structure with a damping mechanism You can

[0026]   Particularly, according to the second aspect of the invention, the stopper is used to seal the upper coil sheet and the liquid. Large relative displacement between the inner bush of the inlet bush unit, in other words, the liquid A large relative displacement between the inner cylinder and the outer cylinder that make up the enclosed bush unit is suppressed. As a result, the extreme deformation of the elastic body is suppressed and liquid leakage is reliably prevented. As a result, durability and reliability are improved.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a vehicle suspension device to which a mount rubber structure according to the present invention is applied.

FIG. 2 is a perspective view of each member constituting the mount rubber.

FIG. 3 is an enlarged vertical cross-sectional view showing a configuration of a connecting portion between an upper coil sheet or a liquid sealing bush unit and a piston rod.

FIG. 4 is an enlarged cross-sectional view taken along the line AA in FIG.

5 is a sectional view taken along line BB in FIG.

FIG. 6 is an enlarged transverse sectional view of a liquid-filled bush unit of another embodiment.

[Explanation of symbols]

12 Upper coil seat 14,54 Liquid enclosing bush unit 16,56 Inner cylinder 17,57 Outer cylinder 19,59 Rubber 21a, 21b, 61a, 61b Liquid chamber 22,62 Orifice 30 Upper stopper 40 Lower stopper

Continued front page    (72) Creator Takeshi Edahiro             3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda             Within the corporation (72) Creator Shigefumi Hirabayashi             3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda             Within the corporation

Claims (2)

[Scope of utility model registration request] 1. A structure of a mount rubber provided at a connecting portion between an upper end of a strut whose lower end is connected to a wheel side and a vehicle body, wherein an upper end of a piston rod of a cylinder constituting the strut is fixed. An inner cylinder, an outer cylinder arranged concentrically with the inner cylinder, an elastic body connecting the inner and outer cylinders, and a pair of which volume is increased or decreased by deformation of the elastic body due to relative displacement between the inner cylinder and the outer cylinder. The liquid chamber and the orifice for flowing the liquid between the pair of liquid chambers constitute a liquid sealing bush unit, and receive the upper end portion of the coil spring coaxially arranged around the outer periphery of the strut. In addition, a mount rubber structure in which an outer cylinder of the liquid-filled bush is integrally incorporated on an inner peripheral surface of an upper coil sheet coupled to a vehicle body. 2. A structure of a mount rubber provided at a connecting portion between an upper end of a strut whose lower end is connected to a wheel side and a vehicle body, wherein an upper end of a piston rod of a cylinder constituting the strut is fixed. An inner cylinder, an outer cylinder arranged concentrically with the inner cylinder, an elastic body connecting the inner and outer cylinders, and a pair of which volume is increased or decreased by deformation of the elastic body due to relative displacement between the inner cylinder and the outer cylinder. The liquid chamber and the orifice for flowing the liquid between the pair of liquid chambers constitute a liquid sealing bush unit, and receive the upper end portion of the coil spring coaxially arranged around the outer periphery of the strut. Further, the outer cylinder of the liquid-filled bush is integrally incorporated into the inner peripheral surface of the upper coil seat coupled to the vehicle body, and the inner cylinder of the liquid-filled bush unit with respect to the upper coil seat is axially moved. The mount rubber structure is characterized in that stoppers are provided which come into contact with the upper surface and the lower surface of the upper coil sheet when the relative displacement exceeds a predetermined amount.