KR100722311B1 - engine mount in which fluid is enclosed - Google Patents

Abstract

The present invention relates to an engine mount for a vehicle having a structure in which a first elastic support and a second support are arranged with a rubber elastic body interposed therebetween. A partition bracket, which is supported by the support and arranged at right angles to the vibration input direction, is provided, and the partition bracket is inserted to provide a hydraulic pressure chamber in which pressure resistance fluctuation can occur based on the elastic deformation of the rubber elastic body during vibration input. On the side of the support body of 1, a variable volume balance chamber at least partly partitioned by a diaphragm is formed on the opposite side to the hydraulic chamber, and a predetermined incompressible fluid is sealed in these hydraulic chambers and the balancing chamber, A fluid-enclosed mounting apparatus having a structure in which an orifice passage communicating with a balance chamber is provided in the partition bracket, In the pressure receiving chamber 38, an umbrella-shaped tool 54 is fixed to the bottom surface of the first support recess 10 by an attachment bolt 19, and is annular in cooperation with the first support recess 10. A constriction portion is formed, and a through hole 56 having a concave ring portion 55 is formed at the center of the partition fitting 36, and an attachment ring 58 is formed on the outer circumference of the through hole 56. This integrally vulcanized rubber elastic film 60 is disposed, and the attachment ring 58 is fitted to the concave ring portion 55 of the through hole 56 at a predetermined gap up and down.

Hydraulic chamber, equilibrium chamber, partition bracket, jigegu, rubber elastic membrane

Description

Engine mount in which fluid is enclosed}

1 is a cross-sectional view showing an embodiment according to the present invention.

The present invention relates to a fluid-enclosed mounting apparatus which achieves a predetermined dustproof effect based on the flow of liquid enclosed therein.

Background Art [0002] Conventionally, a mounting apparatus interposed between members constituting a vibration transmission system for controlling the transmission of vibration, comprising a first support and a second support disposed therebetween at a predetermined distance in a vibration input direction. Background Art A structure formed by connecting rubber elastomers is known, and is widely used as an engine mount for automobiles and the like.

Moreover, in recent years, it is necessary to cope with the advancement of the characteristics required for the dustproof performance of automobiles, and a partition member supported by the second support and disposed at right angles to the vibration input direction is provided inside such a mounting apparatus. By inserting the partition member, a pressure-varying equilibrium chamber in which at least a portion of the hydraulic chamber, in which pressure-resistant fluctuation can occur based on the elastic deformation of the rubber elastic body at the time of vibration input, is formed into a plastic film at least partially. Is formed on the side opposite to the hydraulic chamber, and a predetermined incompressible fluid is enclosed in the hydraulic chamber and the equilibrium chamber, and an orifice passage is formed in communication with the hydraulic chamber and the equilibrium chamber. An apparatus has been proposed.

In other words, in the above-mentioned fluid-enclosed mounting apparatus, an excellent dust-proof action cannot be obtained only by the rubber elastic body based on the resonance action of the fluid flowing in the orifice passage.

The anti-vibration characteristics required for such a mounting apparatus vary depending on the type of input vibration, and when a plurality of types of vibrations are input, different anti-vibration characteristics are required according to the input vibration.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an engine mount for a vehicle equipped with a compact, low component number capable of attenuating vibrations input during high-speed driving, severe vibration, and idle. It is done.

In order to achieve the above object, the present invention relates to an engine mount for a vehicle having a structure in which a first support and a second support are arranged with a rubber elastic body interposed therebetween, and are spaced a predetermined distance in a vibration input direction. A partition bracket, which is supported by the second support hole and disposed at right angles to the vibration input direction, is provided, and the partition bracket is inserted so that internal pressure fluctuation may occur based on the elastic deformation of the rubber elastic body during vibration input. A hydraulic chamber having a volume variable balance chamber having at least a portion defined by a diaphragm on the side opposite to the hydraulic chamber, respectively, and a predetermined incompressible fluid is sealed in the hydraulic chamber and the balancing chamber. At the same time, a fluid-enclosed mount having a structure in which the orifice passage communicating with the hydraulic chamber and the balancing chamber is provided in the partition bracket. In the apparatus, an umbrella-shaped tool is fixed to the bottom surface of the first support stop by an attachment bolt in the hydraulic chamber, and an annular narrowing part is formed in cooperation with the first support stop, and a central portion of the partition bracket is provided. In the periphery, a through-hole formed with a concave ring is formed, and a rubber-elastic film in which the attaching ring is integrally vulcanized and adhered to the outer circumference thereof is disposed on the periphery thereof. It is supposed to be fitted in place.

Hereinafter, in order to describe the present invention in detail, with reference to the drawings with respect to embodiments of the present invention in detail as follows.

First, Figure 1 shows an embodiment of an engine mount for a vehicle constructed in accordance with the present invention. In this figure, 10 and 12 are the 1st support tool and the 2nd support tool which respectively serve as a 1st support body and a 2nd support body, and are arrange | positioned facing apart at predetermined distance. In addition, a rubber elastic body 14 is opened between the first supporting member 10 and the second supporting member 12, and both of the supporting members 10 and 12 are integral with the rubber elastic member 14. Is connected. In this engine mount, the engine unit is dustproofed against the vehicle body by being installed between the vehicle body and the engine unit.

More specifically, the first support bracket 10 is formed in a substantially conical shape, and the attaching portion 16 is axially outwardly so that the large diameter end surface can penetrate and contact the stopper plate 17. It protrudes in the direction and is integrally provided. In addition, a through hole 20 is formed in the first support tool 10 so that the mounting bolt 19 can penetrate in the axial direction.

Further, the second support 12 is composed of a user frusto-conical bottom bracket 24 having an outer flange portion 22 at the edge of the opening, and a cylindrical through hole 26. The through hole 26 is overlapped and fixed to the outer flange portion 22 of the bottom bracket 24 at one end surface in the axial direction, and is formed as a whole in a user truncated cone shape. In addition, a plurality of through holes 30 penetrate into and out of the bottom wall portion of the bottom fitting 24, and a bracket 32 protrudes to the outer circumferential surface of the through hole 26 and is fixedly provided.

Then, the first support 10 and the second support 12 are a predetermined distance on the same axis in the state where the second support 12 is opened toward the small-diameter side end surface of the first support 10. As shown in FIG. Are spaced apart from each other, and the rubber elastic body 14 is refurbished between the first supporting member 10 and the second supporting member 12. The rubber elastic body 14 has a substantially tapered shape, and the outer circumferential surface of the first support spurs 10 with respect to the small diameter side cross section and the inner circumferential surface of the second support spurs 12 with respect to the large diameter side cross section are respectively integrally formed. By being flow-adhesive, it is opened between these 1st and 2nd supporters 10 and 12, and these 1st supporters and the 2nd supporters 12 are integrally with the said rubber elastic body 14. And it is elastically connected.

In addition, a thick disk-shaped diaphragm 34 is disposed between the first sustaining tool 10 and the second sustaining tool 12 at the bottom side of the second retaining tool 12. The diaphragm 34 divides the first support 10 and the second support 12 into two parts, whereby the sealed chamber B is located on the first support 10 side and the second support port. On the 12 side, the space 35 communicated with the outside through the through hole 30 is formed, respectively.

In the sealed chamber B formed between the diaphragm 34 and the first supporting mouth 10, a substantially disk-shaped partitioning tool 36 is provided with its outer circumferential portion in the second supporting mouth 12. By inserting into the ring-shaped portion 37 of the through hole 26 constituting the above, it is disposed in a state inclined in a direction perpendicular to the opposite direction between the first supporting member 10 and the second supporting member 12. By the partition fitting 36, the pressure receiving chamber 38 and the diaphragm 34 side (the first inside of the closed chamber B) are placed on the first support 10 side with the partition fitting 36 inserted therein. It is partitioned by the balance chamber 40 which is located in the 2 support port 12 side, and the said pressure receiving chamber 38 is a rubber | gum at the time of the vibration input between the 1st and 2nd support ports 10 and 12. The internal pressure fluctuation is caused by the volume change based on the elastic deformation of the elastic body 14, while in the balance chamber 40, the volume change is sufficiently permitted by the elastic deformation of the diaphragm 34, Fluctuations in internal pressure are avoided.

In the hydraulic chamber 38 and the equilibrium chamber 40, predetermined incompressible fluids are respectively enclosed.

In addition, the partition bracket 36 is formed with an orifice passage 48 extending in a circumferential direction at its outer peripheral portion, and an end of the orifice passage 48 is formed in the hydraulic chamber 38 and the other end thereof. The chamber 40 communicates with each other in the balance chamber 40 to allow the flow of fluid between the chambers 38 and 40. Then, the orifice passage 48 is caused based on the large pressure difference between the pressure receiving chamber 38 and the balance chamber 40 caused at the time of the vibration input between the first and second supporting ports 10 and 12. The fluid flow is caused to occur, and a predetermined dustproof effect is exerted based on the resonance action of the fluid flowing in the orifice passage 48.

In addition, in this embodiment, it is tuned so that the high damping effect at the time of unpacking driving, starting, etc. is exhibited by the resonance action of the fluid which makes the orifice path 48 flow.

In the hydraulic chamber 38, an umbrella bracket 54 is fixed to the bottom surface of the first support opening 10 by the attachment bolt 19. In addition, although it is not clear from the figure, this umbrella-shaped tool 54 has an engine mount weight between the first and second supporters 10 and 12 when the engine mount is attached, so that both supporters 10 and 12 ) Is moved to a predetermined dimension in a direction close to each other, the umbrella tool bracket 54 is located at a substantially central portion in the pressure chamber 38, whereby the pressure chamber 38 I The annular narrowing part 70 which divides into two division chambers which are located between the 1st support 10 side and the partition bracket 36 side with 54 between them, and communicates these division chambers with each other is provided. It is supposed to be formed.

The umbrella tool 54 is displaced in the pressure receiving chamber 38 at the time of vibration input between the first and second supporting holes 10 and 12, and in this pressure receiving chamber 38, The fluid flows through the constriction between the two division chambers positioned with the umbrella tool bracket 54 interposed therebetween, and based on the resonance action of the fluid flowing through the constriction 70, Dustproof effect of is to be exerted. In addition, in this embodiment, it is tuned so that the dust-proof effect at the time of high-speed driving is exhibited by the resonance action of the fluid which flows through the constriction part.

In addition, a through hole 56 having a concave ring portion 55 formed around the center portion of the partition fitting 36 is formed. Then, a thick disk-shaped rubber elastic film 60 is formed in which the attachment ring 58 is integrally vulcanized and bonded to the outer periphery of the through hole 56, and the attachment ring 58 is formed in the through hole 56. It is assembled by being fitted in the recessed ring part 55 with a predetermined clearance up and down.

By such a configuration, when the pressure difference between the pressure receiving chamber 38 and the balance chamber 40 is large, the attachment ring 58 of the rubber elastic film 60 moves downward in the concave ring portion 55 to form the concave. The hydraulic chamber through the orifice passage 48 while being in fluid contact with the bottom surface of the ring portion 55 to block the flow of the hydraulic chamber 38 and the balance chamber 40 through the through hole 56. When the pressure difference between the hydraulic chamber 38 and the balancing chamber 40 is small and the pressure difference between the hydraulic chamber 38 and the balancing chamber 40 is small, it is located at the center level of the concave ring portion 55 and the through hole ( 56) and the flow of the pressure chamber 38 and the balance chamber 40 through the orifice passage 48 is allowed.

Therefore, based on the small pressure difference between the hydraulic chamber 38 and the balance chamber 40, the fluid flows through the orifice passage 48 and the through hole 56, and the orifice passage is generated. Based on the resonance action of the fluid flowing through the 48 and the through hole 56, a predetermined dustproof effect is exerted.

In addition, in this embodiment, it is tuned so that the high damping effect at the time of idling of a vehicle is exhibited by the resonance action of the fluid which flows in the orifice passage 48 and the through hole 56. As shown in FIG.

In the engine mount having the above-described structure, the first support opening 10 is attached to the engine unit side of the vehicle, while the second support opening 12 is attached to the vehicle body frame side via the bracket 32. By doing so, it is remodeled between these.

In the engine mount of the present embodiment, since the rubber elastic film 60 capable of vibrating vibration during idling is formed inside the partition bracket 36, the size of the engine mount due to the vibration damping mechanism during idling is extremely large. It can be effectively suppressed, whereby the engine mount having excellent dustproof performance as described above becomes compact, and has a great advantage that it can be advantageously formed with a low component score and a simple structure.

Claims (3)

An engine mount for a vehicle having a structure in which a first elastic supporter and a second supporter, which are spaced apart from each other in a vibration input direction, by a rubber elastic body interposed therebetween, are supported by the second supporter. And a partition bracket arranged at right angles to the vibration input direction, and the partition bracket is inserted to provide a pressure receiving chamber on the first support side in which the pressure resistance fluctuation may occur based on the elastic deformation of the rubber elastic body during vibration input. A volume-variable balance chamber, at least partly defined by a diaphragm, is formed on the opposite side to the pressure chamber, and a predetermined incompressible fluid is enclosed in the pressure chamber and the balance chamber, and the pressure chamber and the balance chamber communicate with each other. A fluid-enclosed mounting apparatus having a structure having an orifice passage to be provided in the partition bracket, In the pressure receiving chamber 38, an umbrella-shaped tool 54 is fixed to the bottom surface of the first support recess 10 by an attachment bolt 19, and is annular in cooperation with the first support recess 10. Constriction 70 is formed, In the central portion of the partition bracket 36 is formed a through hole 56 with a concave ring portion 55 formed therein. A rubber elastic film 60 is formed in which the attaching ring 58 is integrally vulcanized and bonded to the outer circumferential portion of the through hole 56, and the attaching ring 58 is a concave ring portion 55 of the through hole 56. It is fitted with a certain gap up and down on the The first support 10 has a truncated cone shape, and the large diameter end surface is integrally protruded in the axial outward direction so that the attachment portion 16 can penetrate and contact the stopper plate 17. Prepared by The through hole 20 is formed in the first support 10 so that the attachment bolt 19 can penetrate in the axial direction. The first support opening 10 is attached to the engine unit side of the vehicle, And a second support hole (12) is attached to the vehicle body frame side. delete delete

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