JP2522147Y2 - Power unit support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a power unit support device used for attaching a power unit such as an engine to a vehicle body side member.

[Conventional technology]

Conventionally, power units such as engines in vehicles are
As disclosed in Japanese Utility Model Unexamined Publication No. 59-110226, it is attached to a vehicle body-side member via a mount member having an anti-vibration function.

In the structure including the mounting member as described above,
An appropriate mounting position of the mount member is determined so that the vibration of the power unit is efficiently absorbed. And
When the mount member is arranged at such a position, as a structure for successfully connecting the mount member and the vehicle body-side member, a connection portion between the mount member and the vehicle body-side member is raised, so that the mounting member serves as a mount member mounting seat. It is conceivable that the vehicle body side member is made to correspond to the position of the mount member by forming the protruding connection portion.

[Problems to be solved by the invention]

However, in the above structure, although the connection between the vehicle body side member and the mount member can be successfully performed at the protruding connection portion of the vehicle body side member, the stress due to the load from the power unit is concentrated at the root of the protruding connection portion. Therefore, there is a problem that deformation, cracks, and the like occur in this portion.

[Means for solving the problem]

In order to solve the above problems, the power unit support device of the present invention is configured such that the power unit is supported by a vehicle body-side member via a mount member having an anti-vibration function, and the mount member is mounted on the vehicle body by a mounting bracket portion of the mount member. In a support device for a power unit connected to a member,
At the connection portion of the mount member of the vehicle body-side member with the mounting bracket portion, the mount portion gradually protrudes in a direction opposite to the load direction from the power unit, and the size of the protruded portion is sequentially increased in the protruding direction. It is characterized in that a projecting connecting portion that is reduced is formed.

[Action]

According to the above configuration, the connection portion of the vehicle body-side member with the mounting bracket portion of the mount member protrudes stepwise in the direction opposite to the load direction from the power unit,
In addition, since the protruding connecting portion is formed such that the size of the protruding portion is gradually reduced in the protruding direction, the stress applied to the protruding connecting portion of the vehicle body side member due to the load from the power unit is dispersed at each protruding portion. Will be done. Therefore, local stress concentration at the projecting connection portion is eliminated, rigidity is improved, and deformation, cracking, and the like around the projecting connection portion are prevented.

〔Example〕

One embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the vehicle is provided with an engine 3 as a power unit in an engine room 2 formed in a front portion of the vehicle. This engine 3 is a car body 1
The engine 3 is disposed on a support member 4 as a vehicle body-side member attached to the vehicle.
8 and connected to the support member 4. One side of the upper part of the engine 3 is provided with an engine bracket 9.
And mounted on the vehicle body 1 via a mount member 10.

As shown in FIG. 2, the engine bracket 7 arranged at the rear of the engine 3 includes an engine-side bracket portion 7a attached to the engine 3 with a plurality of bolts 11,.
The mounting member 8 is formed so as to sandwich the mounting member 8 from both sides. The mounting member 8 includes a mounting member-side bracket portion 7b fastened to the mounting member 8 with a bolt 12 and a nut (not shown). The two bracket portions 7a and 7b are connected to each other by welding. Have been.

As shown in FIG. 3, the mount member 8 includes an outer cylinder 14, an inner cylinder 15, and a circular rubber 16 provided between the outer cylinder 14 and the inner cylinder 15. It is arranged at an optimum position for preventing transmission to the support member 4. The other mounting members 6 and 10 have substantially the same structure as the mounting member 8 described above. The outer cylinder 14 of the mount member 8 has a protruding mounting bracket portion 13 serving as a connection portion with the support member 4. The mounting bracket portion 13 projects forward and is disposed on a projecting connecting portion 17 formed on the support member 4. The inner cylinder 15 is arranged at a position shifted upward from the center of the outer cylinder 14 with the width direction of the vehicle body 1 as the axial direction.

The protruding connecting portion 17 formed on the support member 4 has a rear portion formed in a two-step shape, a first step portion 18 which is a raised portion protruding one step upward, and a first step portion 18. It further has a second step portion 19 which is a raised portion protruding upward.
The upper surface of the second step portion 19 is a flat surface corresponding to the lower surface of the mounting bracket portion 13 of the outer cylinder 14, and has two bolt insertion holes 19a and 19b in the front-rear direction. Then, the bolts 20.2 before and after the bolts 20.2 arranged in the bolt insertion holes 19a and 19b from the upper surface side of the mounting bracket portion 13 of the mounting member 8
2, the mounting member 8 and the protruding connecting portion 17 are fastened to the bolts 20 and 22 by nuts 21 and 23 fastened from the back side of the second step portion 19, and the engine 3 is mounted on the engine bracket 7 and the mounting member. 8 and is connected to the support member 4.

In the above configuration, vibrations during operation of the engine 3 are transmitted to the support member 4 or the vehicle body 1 via the engine brackets 5, 7, 9 and the mount members 6, 8, 10, but each of the vibration-proof members has Mounting member 6
Transmission is suppressed by 8 · 10.

The load from the engine 3 is applied to the engine bracket 5
7 and the support member 4 via the mounting members 6.8. At this time, the load applied to the protruding connecting portion 17 of the support member 4 via the engine bracket 7 and the mounting member 8 is such that the inner cylinder 15 of the mounting member 8 has the second step portion as the mounting member mounting seat surface in the protruding connecting portion 17. Since it is offset with respect to the upper surface of 19, it projects with the fastening portion between the bolt 20 and the nut 21 on the front side for fastening the mounting bracket portion 13 of the outer cylinder 14 and the second step portion 19 of the projecting connection portion 17 as a fulcrum. It acts on the connecting portion 17 as a clockwise moment. Therefore, a large stress is applied to the protruding connecting portion 17. However, since the rear portion of the projecting connection portion 17 has a first stepped portion 18 and a second stepped portion 19, the structure has a stepwise raised structure. 19
And the first stage 18. Therefore, local stress concentration does not occur in the projecting connection portion 17, and the engine 3 is reliably supported without deformation or cracking occurring in and around the projecting connection portion 17.

[Effect of the invention]

As described above, in the power unit support device of the present invention, the power unit is supported by the vehicle body-side member via the mount member having the vibration isolating function, and the mount member is connected to the vehicle body-side member by the mounting bracket portion of the mount member. In the power unit supporting device, the connecting portion of the vehicle body side member with the mounting bracket portion of the mounting member is stepwise raised in a direction opposite to the load direction from the power unit, and the size of the raised portion is increased. Is a configuration in which a protruding connecting portion that is gradually reduced in a protruding direction is formed.

Therefore, the stress applied to the protruding connection portion of the vehicle body-side member due to the load from the power unit is dispersed at each of the raised portions that are raised in a stepwise manner. Therefore, the local stress concentration at the projecting connection portion is eliminated, the rigidity is improved, and the power unit can be reliably supported without deformation, cracking, and the like occurring at and around the projecting connection portion. .

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a front view showing an arrangement of a power unit support device, and FIG. 2 is a view of the power unit shown in FIG. FIG. 3 is an exploded perspective view showing an essential part of the support device of the power unit. 1 is a vehicle body, 3 is an engine (power unit), 4 is a support member (body side member), 5.7 and 9 are engine brackets, 6.8 and 10 are mount members, 13 is a mounting bracket portion, 14 is an outer cylinder, Reference numeral 15 denotes an inner cylinder, 16 denotes a circular rubber, 17 denotes a protruding connecting portion, 18 denotes a first step (raised portion), and 19 denotes a second step (raised portion).

Claims (1)

(57) [Scope of request for utility model registration] 1. A power unit supporting apparatus, wherein a power unit is supported by a vehicle body-side member via a mount member having a vibration isolating function, and the mount member is connected to the vehicle body-side member at a mounting bracket portion of the mount member. The connecting portion of the mount member of the vehicle body side member with the mounting bracket portion is gradually raised in the direction opposite to the direction of the load from the power unit, and the size of the raised portion is gradually reduced in the rising direction. A support device for a power unit, wherein a projecting connecting portion is formed.