JP2015059576A - Vibration isolation mount device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolation mount device that can enhance damping performance for vibrations transmitted from a vibration generation member to a vibration transmission member while improving durability of a side stopper.SOLUTION: A side stopper 19 of a vibration isolation mount device 4 according to an embodiment is interposed between vibration isolation rubber and a fitting part 15, and includes: an outer peripheral part 19a that makes contact with an outer cylinder 11; and an inner peripheral part that cannot make contact with the outer cylinder 11. The rigidity of the inner peripheral part of the side stopper 19 in an axial direction of an inner cylinder 12 is lower than the rigidity of the outer peripheral part 19a of the side stopper 19 in the axial direction of the inner cylinder 12.

Description

  The present invention relates to an anti-vibration mount device, and more particularly, an anti-vibration device in which a side stopper for preventing an outer cylinder and an attachment portion of a bracket from contacting each other is interposed between an attachment portion and an elastic body of a bracket. It relates to a mounting device.

  Generally, a vibration-proof mount device is interposed between a vibration generating member such as an internal combustion engine and a vibration transmission member such as a vehicle body. The vibration isolating mount device includes an outer cylinder coupled to the vehicle body, an inner cylinder provided radially inward of the outer cylinder, a vibration isolating rubber interposed between the outer cylinder and the inner cylinder, Made of rubber that is connected to both ends of the cylinder in the axial direction and is interposed between the bracket and the anti-vibration rubber to support the inner cylinder to the internal combustion engine, and to prevent the outer cylinder and the bracket from contacting each other Side stopper.

  In addition to being able to prevent the vibration of the internal combustion engine from being attenuated by the vibration proof rubber and transmitted to the vehicle body, the vibration proof mount device follows the movement of the internal combustion engine during acceleration / deceleration of the vehicle. When the outer cylinder and the inner cylinder are displaced relative to each other in the axial direction, the outer cylinder collides with the mounting portion via the side stopper, thereby preventing the outer cylinder and the bracket from directly interfering with each other and generating noise. Can be prevented.

  By the way, in this anti-vibration mount device, since the outer cylinder repeatedly and vigorously interferes with the bracket via the side stopper, the side stopper tends to be fatigued and deteriorated. It is known that a side stopper made of an elastic body such as a honeycomb is formed in a honeycomb shape, thereby increasing the rigidity of the side stopper and improving the durability of the side stopper (see, for example, Patent Document 1).

JP-A-6-109050

  However, in such a conventional anti-vibration mount device, since the side stopper is formed in a honeycomb shape, the rigidity of the side stopper cannot be reduced. Therefore, when the outer cylinder and the inner cylinder are relatively displaced in the axial direction following the movement of the internal combustion engine and the outer cylinder collides with the bracket via the side stopper, the side stopper is elastically deformed. The vibration transmitted from the vehicle to the vehicle body cannot be sufficiently damped by the side stopper, and the vibration damping performance of the internal combustion engine may be deteriorated.

  Here, in order to prevent the vibration damping performance of the internal combustion engine from deteriorating, it is necessary to reduce the rigidity of the side stopper. However, if the rigidity of the side stopper is reduced, the rigidity of the outer peripheral portion of the side stopper decreases. When the outer cylinder and the inner cylinder are relatively displaced in the axial direction following the movement of the internal combustion engine, the outer periphery of the side stopper repeatedly interferes with the outer cylinder and the bracket, so that the side stopper There is a risk that the durability of the resin will deteriorate.

  That is, since the conventional side stopper has the same rigidity in the radial direction, it is difficult to improve both the durability of the side stopper and the damping performance of vibration transmitted from the internal combustion engine to the vehicle body. there were.

  The present invention has been made paying attention to the above-described problems, and can improve the damping performance of vibration transmitted from the vibration generating member to the vibration transmitting member while improving the durability of the side stopper. An object of the present invention is to provide an anti-vibration mount device.

  According to a first aspect of the present invention, there is provided an outer cylinder coupled to any one of a vibrating member and a vibration transmitting member to which vibration is transmitted from the vibrating member, and an inner cylinder provided radially inward of the outer cylinder And an elastic body interposed between the outer cylinder and the inner cylinder, and a pair of attachment portions connected to both axial ends of the inner cylinder, and the inner cylinder is either a vibration member or a vibration transmission member. A side stopper made of an elastic body having a bracket that is supported on the other side, an outer peripheral portion that is interposed between the pair of attachment portions and the elastic body, and that can be contacted with the outer cylinder and an inner peripheral portion that cannot be contacted with the outer cylinder. The anti-vibration mount device includes a lower rigidity of the inner periphery of the side stopper in the axial direction of the inner cylinder than that of the outer periphery of the side stopper in the axial direction of the inner cylinder. It is composed of

As a 2nd aspect of this invention, you may make it a some through-hole be formed in the inner peripheral part of a side stopper.
As a third aspect of the present invention, the vibration generating member may be composed of at least an internal combustion engine, the vibration transmitting member may be composed of a vehicle body, and may be interposed between the internal combustion engine and the vehicle body.

  Thus, according to said 1st aspect, the side stopper which consists of an elastic body interposed between a pair of attachment part and an elastic body cannot contact the outer peripheral part and outer cylinder which can contact an outer cylinder freely The inner peripheral part of the side stopper in the axial direction of the inner cylinder is lower than the rigidity of the outer peripheral part of the side stopper in the axial direction of the inner cylinder.

  For this reason, when the outer cylinder and the inner cylinder are displaced relative to each other in the axial direction following the movement of the vibration generating member, the elastic body is attached to the inner peripheral portion of the side stopper which is less rigid than the outer peripheral portion. By making it collide with an attachment part via, the vibration transmitted to a vibration transmission member from a vibration generating member by the elastic deformation of a side stopper can be attenuated, and the damping performance of the vibration of a vibration generating member can be improved.

  In addition, when the outer cylinder and the inner cylinder are relatively displaced in the axial direction following the movement of the vibration generating member during acceleration / deceleration of the vehicle, the outer cylinder is attached to the bracket via the outer periphery of the side stopper. By making it collide with a part, it can prevent that an outer cylinder and the attachment part of a bracket interfere directly, and it can prevent that noise generate | occur | produces.

  In addition, since the rigidity of the outer periphery of the side stopper is higher than the rigidity of the inner periphery, even if the outer cylinder repeatedly and violently interferes with the mounting part via the outer periphery of the side stopper, the side stopper It can be made difficult to deteriorate due to fatigue, and the durability of the side stopper can be improved.

  According to said 2nd aspect, since several through-holes are formed in the inner peripheral part of a side stopper, it is an inner cylinder with respect to the rigidity of the outer peripheral part of the side stopper in the axial direction of an inner cylinder by simple structure. In addition to reducing the rigidity of the inner periphery of the side stopper in the axial direction, the side stopper can be reduced in weight.

  In addition, since the side stopper is provided so as to sandwich both sides of the elastic body in the axial direction, heat is accumulated between the elastic body and the side stopper due to friction at the time of contact between the elastic body and the side stopper, and the elastic body and the side stopper. May deteriorate due to heat.

  Since the through-hole is formed in the inner peripheral part of the side stopper, the anti-vibration mount device of the second aspect can release heat trapped between the elastic body and the side stopper from the through-hole to the surrounding space. It is possible to prevent the elastic body and the side stopper from being deteriorated by heat.

  According to the third aspect, the vibration generating member is formed of at least the internal combustion engine, the vibration transmitting member is formed of the vehicle body, and the vibration isolation mount device is interposed between the internal combustion engine and the vehicle body. Further, it is possible to improve the damping performance of vibration transmitted from the internal combustion engine to the vehicle body while enhancing the durability of the side stopper.

FIG. 1 is a view showing one embodiment of the vibration-proof mount device of the present invention, and is a top view of a power train including an engine and a transmission. FIG. 2 is a view showing one embodiment of the vibration-proof mount device of the present invention, and is a top view of the vibration-proof mount device. FIG. 3 is a view showing an embodiment of the vibration-proof mount device of the present invention, and is a perspective view of the vibration-proof mount device. FIG. 4 is a view showing one embodiment of the vibration proof mount device of the present invention, and is a front view of the vibration proof mount device.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a vibration-proof mount device according to the present invention will be described with reference to the drawings.
1-4 is a figure which shows the vibration isolating mount apparatus of one Embodiment which concerns on this invention, and has shown the example which applied the vibration isolating mount apparatus to the vehicle.
First, the configuration will be described.
In FIG. 1, an FF (front engine front drive) type vehicle 1 is provided with a power train including an engine 2 that is an internal combustion engine and a transmission 3 that shifts the rotation of the engine 2 and transmits it to left and right drive wheels (not shown). The engine 2 and the transmission 3 are supported on the body frames 7, 8, and 9 by vibration-proof mounting devices 4, 5, and 6 at three points on the right side, the left side, and the rear side.

  In the vehicle 1 of this embodiment, the engine 2 and the transmission 3 constitute a vibration generating member, and the vehicle body frame 7 constitutes a vibration transmission member. The transmission 3 may be any of a multi-stage automatic transmission, a continuously variable automatic transmission such as a CVT (Continuously Variable Transmission), or a manual transmission.

  As shown in FIGS. 2 to 4, the anti-vibration mount device 4 includes a metal outer cylinder 11 attached to the vehicle body frame 7 via a bracket 11 </ b> A, and a metal provided radially inward of the outer cylinder 11. And an antivibration rubber 13 as an elastic body interposed between the outer cylinder 11 and the inner cylinder 12.

  The anti-vibration mount device 4 includes a metal bracket 14, and the bracket 14 is connected to both axial end portions of the inner cylinder 12, that is, both longitudinal end portions of the vehicle 1. A pair of plate-like attachment parts 15 and 16 extending in the vehicle width direction so as to be sandwiched, a connection part 17 extending in the front-rear direction of the vehicle 1 so as to connect the attachment parts 15 and 16, and a connection part 17 And a base 18 that connects the body frame 7 to the vehicle body frame 7.

  That is, the bracket 14 has U-shaped mounting portions 15 and 16 and a connecting portion 17 that are attached to both axial ends of the inner cylinder 12, and connects the inner cylinder 12 to the vehicle body frame 7. . For this reason, the vibration isolating mount device 4 can prevent the vibration of the engine 2 and the transmission 3 from being attenuated by the vibration isolating mount device 4 and transmitted to the vehicle body frame 7.

  Here, both axial ends of the vibration isolating rubber 13 in the axial direction of the inner cylinder 12 are located on substantially the same plane as both axial end faces of the outer cylinder 11. It is accommodated in the outer cylinder 11 along the axial direction. For this reason, the volume of the anti-vibration rubber 13 occupying the internal volume of the outer cylinder 11 can be maximized, and the damping performance of the engine 2 and the transmission 3 by the anti-vibration rubber 13 can be effectively improved. The outer cylinder 11 includes a bracket 11A that is connected to the vehicle body frame 7 via bolts 21.

  The anti-vibration mount device 4 is made of an elastic body such as rubber, and includes a pair of thin disk-shaped side stoppers 19 and 20. The side stoppers 19 and 20 are connected to the mounting parts 15 and 16 and the anti-vibration parts. It is interposed between the vibration rubber 13. A gap is formed between the side stoppers 19 and 20 and the attachment portions 15 and 16. Here, the side stoppers 19 and 20 are not limited to rubber, and may be other materials as long as they are as flexible as rubber.

  The side stoppers 19 and 20 have outer peripheral portions 19a and 20a that can contact the outer cylinder 11 and inner peripheral portions 19b and 20b that cannot contact the outer cylinder 11, and the inner peripheral portions 19b of the side stoppers 19 and 20, A plurality of through holes 19c and 20c are formed in 20b. For this reason, the rigidity of the inner peripheral portions 19b and 20b of the side stoppers 19 and 20 in the axial direction of the inner cylinder 12 with respect to the rigidity of the outer peripheral portions 19a and 20a of the side stoppers 19 and 20 in the axial direction of the inner cylinder 12 is It is low. In FIG. 4, since a side stopper 20 having the same shape as the side stopper 19 is provided behind the side stopper 19, the reference numeral (20 b) shown on the inner peripheral portion 20 b of the side stopper 20 is given.

Next, the operation will be described.
When the engine 2 and the transmission 3 are displaced in the longitudinal direction of the vehicle 1 due to acceleration / deceleration of the vehicle 1, the inner cylinder 12 is displaced in the longitudinal direction of the vehicle 1 following the movement of the engine 2 and the transmission 3.

  At this time, the outer cylinder 11 collides with the attachment portions 15 and 16 via the rubber side stoppers 19 and 20 interposed between the pair of attachment portions 15 and 16 and the vibration isolating rubber 13. While restricting the movement of the inner cylinder 12 in the front-rear direction of 1, the outer cylinder 11 and the connecting portions 17 and 18 can be prevented from directly interfering with each other, and noise can be prevented from being generated.

  Further, the side stoppers 19 and 20 of the vibration-proof mount device 4 of the present embodiment have outer peripheral portions 19a and 20a that come into contact with the outer tube 11 and inner peripheral portions 19b and 20b that cannot make contact with the outer tube 11, and the inner tube The rigidity of the inner peripheral portions 19b and 20b of the side stoppers 19 and 20 in the axial direction of the inner cylinder 12 is lower than the rigidity of the outer peripheral portions 19a and 20a of the side stoppers 19 and 20 in the axial direction of the twelve.

  Therefore, as described above, when the inner cylinder 12 is displaced in the front-rear direction of the vehicle 1 following the movement of the engine 2 and the transmission 3, the anti-vibration rubber 13 is set against the rigidity of the outer peripheral portions 19a and 20a. Is transmitted to the body frame 7 from the engine 2 and the transmission 3 by elastic deformation of the side stoppers 19 and 20 by colliding with the mounting portions 15 and 16 via the inner peripheral portions 19b and 20b of the side stoppers 19 and 20 having low rigidity. Therefore, the vibration damping performance of the engine 2 and the transmission 3 can be improved.

  Further, in the vibration proof mount device 4 of the present embodiment, the outer cylinder 11 is provided with the side stopper 19 because the rigidity of the outer peripheral portions 19a and 20a of the side stoppers 19 and 20 is higher than the rigidity of the inner peripheral portions 19b and 20b. , 20 even if it repeatedly and violently interferes with the mounting parts 15 and 16 via the outer peripheral parts 19a and 20a, the side stoppers 19 and 20 can be fatigued and hardly deteriorated. Durability can be improved.

  Further, in the vibration isolating mount device 4 of the present embodiment, since the plurality of through holes 19c, 20c are formed in the inner peripheral portions 19b, 20b of the side stoppers 19, 20, the side in the axial direction of the inner cylinder 12 can be achieved with a simple configuration. In addition to the rigidity of the outer peripheral portions 19a and 20a of the stoppers 19 and 20, the rigidity of the inner peripheral portions 19b and 20b of the side stoppers 19 and 20 in the axial direction of the inner cylinder 12 can be reduced. 20 can be reduced in weight.

  Here, in the anti-vibration mount device 4 of the present embodiment, the side stoppers 19 and 20 are provided so as to sandwich both sides in the axial direction of the anti-vibration rubber 13, so that the anti-vibration rubber 13 and the side stoppers 19 and 20 are in contact with each other. Due to the friction of time, heat builds up between the anti-vibration rubber 13 and the side stoppers 19 and 20, and the anti-vibration rubber 13 and the side stoppers 19 and 20 may be deteriorated by the heat.

  On the other hand, in the vibration proof mount device 4 of the present embodiment, the through holes 19c and 20c are formed in the inner peripheral portions of the side stoppers 19 and 20, so that the vibration proof rubber 13 and the side stoppers 19 and 20 are interposed between them. The accumulated heat can be released from the through holes 19c and 20c to the surrounding space, and the vibration-proof rubber 13 and the side stoppers 19 and 20 can be prevented from being deteriorated by heat.

  As a result, the anti-vibration rubber 13 of the present embodiment can improve the damping performance of vibration transmitted from the engine 2 and the transmission 3 to the vehicle body frame 7 while enhancing the durability of the side stoppers 19 and 20.

The anti-vibration mount device 4 of this embodiment is interposed between the engine 2 and transmission 3 of the vehicle 1 and the vehicle body frame 7, but is not limited to this, and is provided in the vehicle 1. An anti-vibration mount device may be interposed between the vibration generating member that generates the vibration and the vibration transmitting member that transmits the vibration from the vibration generating member. Further, the vibration-proof mount device is not limited to the vehicle 1, and any object may be used as long as the object includes a vibration generating member that generates vibration and a vibration transmission member that transmits vibration from the vibration generating member. May be applied. Further, the anti-vibration mount device 4 of the present embodiment may be configured such that the outer cylinder 11 is connected to the engine 2 and the inner cylinder 12 is connected to the vehicle body frame 7 via the bracket 14.
In addition, a gap is formed between the side stoppers 19 and 20 and the mounting portions 15 and 16, but the side stoppers 19 and 20 are interposed between the mounting portions 15 and 16 and the outer cylinder 11 without any gaps. Also good.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

  DESCRIPTION OF SYMBOLS 2 ... Engine (vibration member), 3 ... Transmission (vibration member), 4 ... Anti-vibration mount apparatus, 7 ... Body frame (vibration transmission member), 11 ... Outer cylinder, 12 ... Inner cylinder, 13 ... Anti-vibration rubber (Elastic body), 14 ... bracket, 15, 16 ... mounting portion, 19, 20 ... side stopper, 19a, 20a ... outer peripheral portion, 19b, 20b ... inner peripheral portion, 19c, 20c ... through hole

Claims (3)

An outer cylinder coupled to any one of the vibration generating member and the vibration transmitting member from which vibration is transmitted from the vibration generating member;
An inner cylinder provided radially inward of the outer cylinder;
An elastic body interposed between the outer cylinder and the inner cylinder;
A bracket having a pair of attachment portions connected to both axial ends of the inner cylinder, and supporting the inner cylinder on the other of the vibration generating member and the vibration transmitting member;
Including a side stopper made of an elastic body interposed between the pair of mounting portions and the elastic body and having an outer peripheral portion that can contact the outer cylinder and an inner peripheral portion that cannot contact the outer cylinder. An anti-vibration mount device configured,
An anti-vibration mount device, wherein the rigidity of the inner peripheral portion of the side stopper in the axial direction of the inner cylinder is made lower than the rigidity of the outer peripheral portion of the side stopper in the axial direction of the inner cylinder.   The vibration-proof mount device according to claim 1, wherein a plurality of through holes are formed in the inner peripheral portion of the side stopper.   The said vibration member is comprised from an internal combustion engine at least, the said vibration transmission member is comprised from the vehicle body, and it is interposed between the said internal combustion engine and the said vehicle body, The Claim 1 or Claim 2 characterized by the above-mentioned. Anti-vibration mounting device.

Images