JP2012061958A - Device for supporting vehicle engine mount - Google Patents

Abstract

In a vehicle engine mount support device for mounting a mount insulator to a vehicle body by a front mounting portion and a rear mounting portion, the degree of freedom in layout in the engine room is improved and the natural frequency of the engine mount is increased. The purpose is to reduce vibration transmitted from the powertrain to the vehicle body.
A front mounting portion (19) and a rear mounting portion (20) of an engine mount (13) extend in a vehicle front-rear direction at a position lower than an upper end (18T) of a mount insulator (18) and are mounted on a mounting bracket. It is connected by a reinforcing member (22) straddling the top of (17).
[Selection] Figure 1

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle engine mount support device, and more particularly to a vehicle engine mount support device provided with a plurality of mounting portions.

In the support device for supporting the power train of the vehicle, as shown in FIG. 9, the engine mount 103 that supports the power train 101 on the vehicle body 102 is a front mounting portion as a mounting portion on the vehicle front side and the vehicle rear side of the mount insulator 104. 105 and a rear attachment portion 106 are provided, and some of them are attached to the vehicle body 102 via the front attachment portion 105 and the rear attachment portion 106. A mount bracket 107 extending from the power train 101 is connected to the engine mount 103.
However, the vibration transmitted from the power train 101 may greatly displace / deform the attachment site on the side of the power train 101, which may increase the vibration transmitted from the power train 101 to the vehicle body 102.

Japanese Patent Laid-Open No. 10-47416

  The anti-vibration mount according to Patent Document 1 is provided with a stopper member that presses both ends of the stopper member into the concave support portion of the holding member, easily assembles the stopper member, and covers the top of the mount insulator. Thus, vibration transmitted from the power train to the vehicle body is suppressed.

  However, in the above-mentioned Patent Document 1, there is a problem that the stopper member protrudes above the mount insulator, and the size of the engine mount is increased in the vertical direction. As a result, the space from the engine mount to the engine hood is reduced, resulting in inconvenience that a useless space is created.

In general, the mounting portion of the engine mount is arranged in a balanced manner at several locations around the engine mount in order to increase the mounting rigidity of the engine mount to the vehicle body. The rigidity of the mounting portion of the engine mount is desired to be sufficiently high in order to contribute to the vehicle NVH performance.
However, in particular, in the engine mount on the vehicle right side (engine side) in a horizontally mounted engine / transmission vehicle, the clearance between the engine mount and the engine is narrow, and the degree of freedom in designing the shape of the mounting portion is small. In many cases, it was difficult to improve the rigidity of the engine mount.
Further, it is possible to improve the rigidity of the attachment portion by increasing the plate thickness of the attachment portion, but this method has a disadvantage that the weight of the attachment portion also increases.
Furthermore, in the case of an engine mount having a mounting portion made of a sheet metal, since the degree of freedom in designing the shape is small, there are few cases where other parts are attached to the mounting portion, and an empty space is often created above the engine mount.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle engine mount support device for improving the degree of freedom of layout in an engine room and reducing the vibration transmitted from the power train to the vehicle body by increasing the natural frequency of the engine mount. There is.

  According to the present invention, a mount insulator that supports an inner cylinder through an elastic body in an outer cylinder, and is connected to a mounting bracket that extends from a power train is connected to the inner cylinder. In the vehicle engine mount support device for attaching the mount insulator to the vehicle body by the front side mounting part and the rear side mounting part, respectively. The rear mounting portion is connected by a reinforcing member extending in the vehicle front-rear direction at a position lower than the upper end of the mount insulator and straddling the top of the mount bracket.

  The vehicle engine mount support apparatus according to the present invention can improve the degree of freedom of layout in the engine room and can increase the natural frequency of the engine mount to reduce vibration transmitted from the powertrain to the vehicle body.

FIG. 1 is a plan view of the front portion of the vehicle. (Example) FIG. 2 is a front view of the front portion of the vehicle. (Example) FIG. 3 is a right side view of the front portion of the vehicle. (Example) FIG. 4 is a perspective view of the engine mount. (Example) FIG. 5 is an exploded view of the engine mount. (Example) FIG. 6 is a view of the engine mount as viewed from the vehicle interior side. (Example) FIG. 7 is a view of the engine mount as viewed from the rear of the vehicle. (Example) FIG. 8 is a view of the engine mount as viewed from the vehicle interior side. (Modification) FIG. 9 is a perspective view of the engine mount. (Conventional example)

  The purpose of this invention is to mount the front mounting portion and the rear mounting portion for the purpose of improving the freedom of layout in the engine room and reducing the vibration transmitted from the power train to the vehicle body by increasing the natural frequency of the engine mount. It is realized by connecting with a reinforcing member that extends in the vehicle front-rear direction at a position lower than the upper end of the insulator and straddles the top of the mount bracket.

1 to 7 show an embodiment of the present invention.
1 to 3, 1 is a vehicle, 2 is a vehicle body, 3 is a dash panel, 4 is an engine hood, 5 is an engine room, 6R is a right front wheel, and 6L is a left front wheel.
The vehicle body 2 includes a right side frame 7R and a left side frame 7L as a pair of side frames extending in the vehicle front-rear direction.
In the engine room 5, a power train 10 in which an engine 8 and a transmission 9 connected to the engine 8 are horizontally disposed in the vehicle width direction is disposed between the right side frame 7R and the right side frame 7L. A radiator 11 is arranged in front of the power train 10.

The right part of the engine 8 of the powertrain 10 is supported by the support device 12.
The support device 12 includes an engine mount 13 that supports the engine 8 at the right portion of the power train 10.
As shown in FIGS. 5 and 6, the engine mount 13 supports an inner cylinder 16 through an elastic body (rubber material or the like) 15 in an outer cylinder 14 and extends from the power train 10 to the inner cylinder 16. A mount insulator 18 is connected to the right side frame 7R of the vehicle body 2 to which the bracket 17 is connected, and a tip end portion of the mount bracket 17 is connected via a stopper rubber 45 wound around the outer peripheral surface. A front attachment portion 19 and a rear attachment portion 20 are provided on the vehicle front side and the vehicle rear side, respectively, and the mount insulator 18 is attached to the right side frame 7R by the front attachment portion 19 and the rear attachment portion 20. Further, the outer cylinder 14 is provided with an inner attachment portion 21 that extends to the inner side of the vehicle and is fixed to the vehicle body 2.

In the engine mount 13, the front mounting portion 19 and the rear mounting portion 20 extend in the vehicle front-rear direction at a position lower than the upper end 18 T of the mount insulator 18 and straddle the mount bracket 17 as shown in FIG. As shown in FIG. 5 and FIG. 7, the front fastening bolt 25 is a fastening point P between the front extension bracket 23 and the rear extension bracket 24 fixed to the upper surface of the right side frame 7R. And the rear fastening bolt 26.
As shown in FIGS. 5 and 6, the reinforcing member 22 includes a side surface portion 27 that surrounds the left side surface of the mount insulator 18 and is connected to the front mounting portion 19 and the rear mounting portion 20. A bead 28 for improving strength is formed on the side surface portion 27 so as to extend in the vehicle front-rear direction.
Thus, by connecting the front side mounting part 19 and the rear side mounting part 20 with the reinforcing member 22, the displacement and movement of the front side mounting part 19 and the rear side mounting part 22 can be interlocked, and the front side mounting part. It can control that 19 and rear side attachment part 20 change or change separately.
In particular, when a vehicle vertical vibration is applied to the powertrain 10 and a vehicle vertical load is input to the engine mount 13, the front mounting portion 19 and the rear mounting portion 20 having the largest displacement or deformation amount. The movement of the portion located on the inner side in the vehicle width direction can be suppressed by the reinforcing member 22. As a result, the movement of the front mounting portion 19 and the rear mounting portion 20 can be restricted and the amount of displacement or deformation can be suppressed, so that the natural frequency of the entire engine mount 13 can be increased by the reinforcing member 22 and the powertrain. The vibration transmitted from 10 to the vehicle body 2 can be reduced.
Further, with such a structure, the reinforcing member 22 can be prevented from protruding above the vehicle of the engine mount 13 (or the mount insulator 18), so that the engine mount 4 can be increased without increasing the height of the engine hood 4. The space 29 above 13 (or mount insulator 18) can be expanded, and on-vehicle components can be arranged above engine mount 13 (or mount insulator 18) using this space 29, improving the degree of freedom in layout. be able to.

Further, as shown in FIG. 7, the rear mounting portion 20 as at least one of the front mounting portion 19 and the rear mounting portion 20 has a pair of right sides extending in the vertical direction from both sides of the fastening point P to the vehicle body 2. The vertical wall portion 30R and the left vertical wall portion 30L are connected. The reinforcing member 22 is formed with a connecting portion 31 having a hat-shaped cross section that is connected to the right vertical wall portion 30R and the left vertical wall portion 30L.
With such a structure, the coupling force of the reinforcing member 22 to the front mounting portion 19 and the rear mounting portion 20 can be increased. As a result, the rigidity of the reinforcing member 22 is increased, the natural frequency of the engine mount 13 can be improved, and the vibration reduction effect can be enhanced.

Further, as shown in FIGS. 1 to 5, the degassing tank 32 through which the cooling water for cooling the power train 10 flows is disposed above the mount insulator 18 and via a rear elastic body 33 as an elastic body. And attached to the reinforcing member 22. The rear elastic body 33 includes a vertical through hole 34, and a support shaft 35 below the degassing tank 32 is inserted from above the through hole 34. The support shaft 35 is interposed via the rear elastic body 33. Thus, the degassing tank 32 is elastically supported by being inserted into the insertion hole 36 of the reinforcing member 22.
Further, the degassing tank 32 includes a front tank bracket 38 provided with a tank bolt 37 at a front portion, and one end of one end portion of a step-shaped fixing bracket 40 via a front elastic body 39 on the tank bolt 37. While being inserted into the side bolt hole 41, the other end of the fixing bracket 40 is fixed to the fixing portion 42 of the reinforcing member 22 on the front side of the mount insulator 18 with a fixing bolt or the like, so that it is elastically supported by the engine mount 13. The The degassing tank 32 is provided with a rear tank bracket 43.
With such a structure, the degassing tank 32 is interposed via the elastic bodies 33 and 39 using the enlarged space 29 formed above the engine mount 13 without increasing the height of the engine hood 4. Since the degassing tank 32 becomes a mass because it can be attached to the reinforcing member 22, the degassing tank 32 can function as a dynamic damper, and vibration transmitted from the power train 10 to the vehicle body 2 via the engine mount 13 can be generated. Can be reduced.
Further, by using this space 29 (a space formed above the engine mount 13), the degassing tank 32 can be arranged at a high position in the engine room 5 (or the highest position in the cooling water channel).

FIG. 8 shows a modification according to this embodiment.
As shown in FIG. 8, the reinforcing member 22 is integrally formed with a vertical wall portion 44 that is connected to the front attachment portion 19 and the rear attachment portion 20.
With such a structure, the reinforcing member 22 can be easily assembled with the front attachment portion 19 and the rear attachment portion 20.

In this embodiment, parts other than the degassing tank can be applied as parts to be assembled to the front mounting part and the rear mounting part of the engine mount.
Moreover, the structure which abbreviate | omits the attachment part of a degassing tank and fixes a reinforcement member directly to a front side attachment part and a rear side attachment part is also possible.
Further, the degassing tank bracket can be integrated with the reinforcing member.

  The vehicle engine mount support device according to the present invention can be applied to various vehicles.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 4 Engine hood 5 Engine room 8 Engine 9 Transmission 10 Power train 12 Support apparatus 13 Engine mount 14 Outer cylinder 15 Elastic body 16 Inner cylinder 17 Mount bracket 18 Mount insulator 19 Front side installation part 20 Rear side installation part 22 Reinforcement Member 27 Side surface portion of reinforcing member 29 Space 30R Right vertical wall portion 30L Left vertical wall portion 31 Connecting portion 32 Degassing tank 33 Rear elastic body

Claims (3)

  A mount insulator that supports the inner cylinder through an elastic body in the outer cylinder, and that is connected to a mounting bracket extending from the power train to the inner cylinder is disposed on the vehicle body, and the front side of the outer cylinder is on the vehicle front side and vehicle rear side In the vehicle engine mount support device, wherein the mounting insulator and the rear mounting portion are provided, and the mount insulator is attached to the vehicle body by the front mounting portion and the rear mounting portion, the front mounting portion and the rear mounting portion. Are connected by a reinforcing member extending in the vehicle front-rear direction at a position lower than the upper end of the mount insulator and straddling the top of the mount bracket.   A pair of vertical wall portions extending in a vertical direction from both sides of a fastening point to the vehicle body are connected to at least one of the front side attachment portion and the rear side attachment portion, and the reinforcing member is connected to the vertical wall portion. 2. The vehicle engine mount support device according to claim 1, wherein a connecting portion having a hat-shaped cross section is formed.   3. The vehicle according to claim 2, wherein a degassing tank through which cooling water for cooling the power train flows is disposed above the mount insulator and attached to the reinforcing member via an elastic body. Engine mount support device.

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