JP2751524B2 - Engine mount support structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention has a cylindrical shape including an outer cylinder and an inner cylinder connected to the outer cylinder via an elastic body, and fixes the outer cylinder to an engine. The present invention relates to a support structure used for supporting the inner cylinder by a vehicle body side portion of an engine mount.

(Prior Art) Conventionally, as a support structure for an engine mount as described above, for example, described in page B-133 of Service Report No. 588 (UA2-1) issued by Nissan Motor Co., Ltd. in September 1987,
As shown in FIG. 6, this support structure has three cylindrical members including an outer cylinder 2a fixed to the engine 1 and an inner cylinder 2b connected to the outer cylinder via an elastic body (not shown). In order to support the inner cylinders 2b of the engine mounts 2 by the body side members of the engine room side 3a of the vehicle body 3 (the left side of the vehicle is shown as the vehicle body front in the figure), the engine mounts 2 are mounted. Brackets are disposed at three places of the inner cylinders 2b and the body side member portions of the engine room side portion 3a so as to sandwich the inner cylinders 2b, respectively, so that their axes extend in the vehicle longitudinal direction. 4 and the through bolts 5 and nuts 6
To the bracket 4.

By the way, when the engine 1 is mounted on the vehicle body 3, the vehicle body 3 is usually lowered from above the engine 1 as shown by an arrow in FIG.
Is raised and the engine 1 is housed in the engine room as shown by the phantom line in the figure. Therefore, the work of supporting the engine mount 2 on the engine room side 3a of the vehicle body 3 is performed by putting a hand from below the vehicle body 3.

In the conventional support structure described above, the engine mount 2 such as that shown in the lower left of FIG. 6 in which the work space in which the through bolt 5 can be inserted into the bracket 4 on the vehicle body side is located below, , The outer cylinder 2a is fixed in advance with a plurality of bolts, and after the engine 1 is placed in the engine room, the through bolt 5 is inserted into the bracket 4, and the through bolt 5 is fixed to the bracket 4 with the nut 6. However, as shown in the lower right of FIG. 6 and the upper part of the same figure, the engine mount 2 which does not have a working space below which the through bolt 5 can be inserted into the bracket 4 on the vehicle body side is not provided. As shown in FIG. 7, the inner cylinder 2b is previously passed through the bracket 4 and attached with the bolts 5 and the nuts 6, or the outer cylinder 2a is previously mounted on the engine 1. Leave fixed by means of bolts,
After the engine 1 is housed in the engine room, in the former case, the outer cylinder 2a is fixed to the bracket on the engine 1 side with a plurality of bolts, and in the latter case, the engine mount 2 is temporarily attached to the bracket 4 with a temporary jig. After the temporary fixing, the hand is inserted from above the vehicle body 3 to insert the through bolt 5 into the bracket 4, the through bolt 5 is fixed to the bracket 4 by the nut 6, and then the temporary jig is removed. .

(Problems to be Solved by the Invention) However, in the work of supporting the engine mount based on such a conventional support structure, even if the work space in which the through bolt 5 can be inserted into the bracket 4 on the vehicle body side is below, the engine is supported. There is a problem that workability is extremely poor because it is necessary to insert the through bolt 5 into the bracket 4 and tighten the nut 6 therethrough in a narrow space of the room,
On the other hand, when there is no lower working space through which the through bolt 5 can be inserted into the bracket 4 on the vehicle body side,
The former requires a plurality of bolts to tighten the outer cylinder 2a, which is troublesome, and the latter requires the bolt 5 to be inserted through the bracket 4 in the narrow space of the engine room and the nut to be inserted there. 6, the workability is extremely poor because of the necessity of fastening, and in addition, there is a problem that extra work for attaching and detaching the temporary jig to and from the engine mount 2 is required.

These problems have hindered the reduction of the line tact time of the automobile production line, and also prevented the automation of the engine mounting operation.

The present invention provides a support structure that advantageously solves the above-described problems.

(Means for Solving the Problems) A support structure for an engine mount according to the present invention has a cylindrical shape including an outer cylinder and an inner cylinder connected to the outer cylinder via an elastic body. In a structure in which the inner cylinder of the engine mount to be fixed is supported by a side portion of the vehicle body, the engine mount is disposed so that an axis thereof extends in the left-right direction of the vehicle body, and a box-shaped structure is provided on the side portion of the vehicle body. The cross-sectional member is formed so that a through bolt can be inserted from the outside to the inside of the vehicle body side portion, and the through bolt inserted into the box-shaped cross-sectional member from the outside of the vehicle body side portion to the inside toward the inside, It is characterized by being inserted into the inner cylinder and fixed to the box-shaped section member.

According to the present invention, when the engine is mounted on the vehicle body, the bracket is slidably contacted with a bracket provided on a box-shaped cross-sectional member located on the vehicle body side portion for supporting the internal cylinder. An inclined guide portion for guiding the introduction of the tube into the bracket may be formed.

(Operation) In such a support structure, a box-shaped cross-section member located on the side of the vehicle body is formed so that a through bolt can be inserted from the outside of the side of the vehicle body to the inside, and the engine mount is mounted on the body. In a state where the axis extends so as to extend in the left-right direction of the vehicle body, a through bolt is inserted through the box-shaped section member from the outside of the vehicle body side to the inside, and the through bolt is inserted into the inner cylinder of the engine mount. Since it is inserted and fixed to the box-shaped cross-section member, the work of supporting the engine mount on the box-shaped cross-section member on the side of the vehicle body when mounting the engine on the vehicle body can be performed from the outside of the vehicle body side portion.

Therefore, according to the support structure of the present invention, the work of supporting the engine mount on the side of the vehicle body can be performed using a sufficiently large space outside the side of the vehicle body, so that the workability is greatly improved, and After mounting the engine in the engine room, the inner cylinder of each engine mount can always be supported by tightening one through bolt, so when supporting the engine, tighten multiple bolts for each engine mount In addition to eliminating the need for work, temporary jigs can be dispensed with and the time for attaching and detaching the jigs can be reduced, which can significantly reduce the line tact time of the automobile production line, Can be easily automated.

A bracket for supporting the inner cylinder of the engine mount, provided on a box-shaped cross-sectional member located on the side of the vehicle body,
When the engine is mounted on the vehicle body, an inclined guide part that slides on the inner cylinder and guides the introduction of the inner cylinder into the bracket is formed. Since the inner cylinder of the engine mount can be easily introduced into the bracket of the part, the workability of supporting the engine mount on the side of the vehicle body is further improved, shortening the line tact time and automating the engine mounting work. It can be even easier.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view showing one embodiment of a support structure for an engine mount according to the present invention, in which parts similar to those shown in FIG. 6 are denoted by the same reference numerals.

That is, in the drawing, reference numeral 1 denotes an engine, 2 denotes three engine mounts supported on the side of the vehicle body, 3 denotes a vehicle body (in the figure, only the front portion is shown with the left side being a vehicle front side), and 3a denotes an engine of the vehicle body 3 The side of the room, 5 indicates a through bolt, and 6 indicates a nut.

2 and 3 are a plan view and a side view showing one of the three engine mounts 2 and a part of the engine room side 3a, and FIG. 4 is a view taken along a line IV-IV in FIG. As shown in the drawing, each engine mount 2 has a cylindrical shape with an outer cylinder 2a and an inner cylinder 2b coupled to the outer cylinder 2a via a rubber-like elastic body 2c. A bracket 2d for fixing the outer cylinder 2a to the engine 1 is fixed to the cylinder 2a by welding.

On the other hand, a part of the engine room side part 3a is formed with a body side member part 3b that forms a box-shaped cross section and extends in the vehicle front-rear direction, and the body side member part 3b is provided inside the engine room. And the bracket 7 are fixed by spot welding.

Here, the bracket 7 has a hat-shaped cross section as shown in FIG. 2, and has a lower opening as shown in FIGS. 3 and 4, and the opening end is slightly bent outward. Thus, the guide portion 7a is inclined so that the opening width increases as approaching the free edge.

A bolt hole 7b is formed in the bracket 7, and a bolt hole 3c and a tool hole 3d are formed in the body side member portion 3b so as to be aligned with the bolt hole 7b in the lateral direction of the vehicle body. .

In the support structure of this embodiment, since the inner cylinders 2b of the three engine mounts 2 are supported by the body side member 3b of the engine room side 3a of the vehicle body 3, the engine mounts 2 are mounted. Each of the engine mounts 2 is disposed between the bracket 7 and the body side member 3b so that the axis thereof extends in the lateral direction of the vehicle body.
Each of the through holes 5 is inserted from the outside of the left and right body side member portions 3b into each of the tool holes 3d and the bolt holes 3c.
Through the center hole of the inner cylinder 2b of each engine mount 2 and the bolt hole 7b of the bracket 7,
Are fixed to the body side member 3b and the bracket 7 by nuts 6, respectively.

In such a support structure, in order to mount the engine 1 on the vehicle body 3, the vehicle body 3 is lowered from above the engine 1 as shown by an arrow in FIG.
Is raised, and the engine 1 is placed in the engine room as shown by the phantom line in the figure, and the operation of supporting the engine mount 2 on the engine room side 3a of the vehicle body 3 is mainly performed on the side of the vehicle body 3.

That is, here, first, the bracket 2d is attached to the engine 1
Is fixed to a predetermined position with a plurality of bolts, so that the outer cylinder 2a of each engine mount 2 is mounted on the engine 1 in advance, and the axis of each engine mount 2 is oriented in the lateral direction of the vehicle body when the engine 1 is mounted on the vehicle body 3. When mounting the engine 1 in the engine room, the inner cylinders 2b of the engine mounts 2 are guided by sliding contact with the guide portions 7a while the brackets 7 and the body side member portions are mounted. 3b so that the center hole of the inner cylinder 2b is aligned with the tool hole 3d and the bolt hole 3c and the bolt hole 7b of the bracket 7, and then the through bolts 5 are inserted into the left and right body side member portions 3b. From outside, each tool hole 3d and bolt hole 3c, the center hole of the inner cylinder 2b of each engine mount 2,
After sequentially passing through the bolt holes 7b of the bracket 7, the hands are inserted from above or below the vehicle body, and the nuts 6 are screwed into the end portions of the through bolts 5, and the nuts 6 are prevented from rotating with a spanner. As shown in FIG. 2, a box wrench 8 is inserted from the outside of the left and right body side member portions 3b through the tool holes 3d into the inside of the closed cross section of the body side member portion 3b. The above-mentioned supporting work is performed by the procedure of fixing each through bolt 5 to the body side member portion 3b and the bracket 7 with the nut 6.

In addition, the nut 6 is previously attached to the bracket 7 by bolt holes.
Align with 7b and fix by welding.
May be supplied and tightened by a normal automatic screw tightening machine. In this case, the operation of supporting the engine mount 2 on the engine room side 3a of the vehicle body 3 can be easily automated.

Therefore, according to the support structure of this embodiment, the operation of supporting the engine mount 2 on the engine room side portion 3a can be performed using a sufficiently large space outside the engine room side portion 3a. In addition, since the inner cylinder 2b of each engine mount 2 can be always supported by tightening one through bolt 5 after the engine 1 is placed in the engine room, the engine 1 This eliminates the need to perform the work of tightening a plurality of bolts for each mount 2 and also eliminates the need for a temporary jig, which can save the labor of attaching and detaching the jig. This can result in a significant reduction in the length, and can facilitate the automation of the engine mounting operation.

Here, since the guide portion 7a is formed in the bracket 7 for supporting the inner cylinder 2b of the engine mount 2, the bracket 7 is used when the engine 1 is stored in the engine room.
The inner cylinder 2b can be easily introduced between the inner side and the body side member 3b, and the workability of supporting the engine mount 2 on the engine room side 3a is further improved, shortening the line tact time and mounting the engine. Automation of work can be further facilitated.

As described above, the present invention has been described based on the illustrated examples. However, the present invention is not limited to the above-described examples. For example, the number of engine mounts supported by the vehicle body side can be appropriately changed as necessary. The present invention can also be applied to a case where an engine mount supported by the side of the vehicle body and an engine mount supported by a member passing through the lower center of the vehicle body are combined.

Note that the appearance problem does not occur by mounting the tire when each tool hole is located in the wheel house. If the tool holes are not located in the wheel house, the problem can be solved by installing the front fender after mounting the engine.

(Effect of the Invention) According to the support structure of the present invention, the operation of supporting the engine mount on the side of the vehicle body can be performed using a sufficiently wide space outside the side of the vehicle body. As a result, it is possible to support the inner cylinder of each engine mount by always tightening one through bolt after the engine is placed in the engine room,
At the time of the support work, it is not necessary to perform tightening work of a plurality of bolts for each engine mount, and a temporary jig can be made unnecessary, so that it is not necessary to attach and detach the jig. This can significantly reduce the line tact time of the line, and can facilitate automation of the engine mounting operation.

And, when mounting the engine on the vehicle body, the bracket provided on the side of the vehicle body for supporting the inner cylinder is slidably contacted with the inner cylinder to guide the introduction of the inner cylinder into the bracket. When the engine guide is formed, the internal cylinder of the engine mount can be easily introduced into the bracket on the side of the vehicle body when the engine is housed in the engine room of the vehicle body. The workability is further improved, and the shortening of the line tact time and the automation of the engine mounting work can be further facilitated.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a support structure for an engine mount according to the present invention, and FIGS. 2 and 3 show one of three engine mounts and a part of an engine room side in the support structure. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3, FIG. 5 is an explanatory view showing the operation of supporting the engine mount based on the support structure of the above embodiment, and FIG. FIG. 7 is a plan view showing a support structure of the engine mount of FIG. 7, and FIG. 7 is an explanatory view showing a support operation of the engine mount based on the above-mentioned conventional support structure. 1 engine 2 engine mount 2a outer cylinder 2b inner cylinder 2c elastic body 3 body 3a engine room side 5 bolts 6 nuts 7 … Bracket, 7a …… Guide

Claims (2)

(57) [Claims] An outer cylinder (2a) and an elastic body (2
c) forming a cylindrical shape with an inner cylinder (2b) connected via
An engine mount (2) for fixing the outer cylinder (2a) to an engine (1), wherein the inner cylinder (2b) is supported by a side portion (3a) of a vehicle body (3). ) Is arranged so that its axis extends in the left-right direction of the vehicle body, and the box-shaped section member (3b) located at the vehicle body side portion (3a) is
The through-bolt (5) is formed so as to be inserted from the outside of the vehicle body side to the inside, and is inserted through the box-shaped section member (3b) from the outside to the inside of the vehicle body side (3a). Insert a through bolt (5) into the inner cylinder (2b) and insert the through-hole member (3
b) A support structure for an engine mount, which is fixed to b). 2. The engine (1) is mounted on a bracket (7) provided on a box-shaped section member (3b) located on the vehicle body side portion (3a) for supporting the inner cylinder (2b). Forming an inclined guide portion (7a) that slides on the inner cylinder (2b) when mounted on the vehicle body (3) and guides the inner cylinder (2b) into the bracket (7); The support structure for an engine mount according to claim 1, wherein: