JPH03243418A - Structure for supporting engine mount - Google Patents

Abstract

PURPOSE:To easily perform supporting work of an engine mount with a large space on a side of a vehicle body utilized by placing an engine mount so that its axial line extends laterally along the vehicle body and permitting a through bolt to pass from an outer side of the body to the engine mount. CONSTITUTION:An engine 1 is supported on a side 3a of an engine room of a vehicle body 3 by three engine mounts 2. Each engine mount 2 is cylindrically formed of an outer cylinder 2a and an inner cylinder 2b which is coupled to the outer cylinder 2a via a rubber-like elastic body 2c. In this case since each inner cylinder 2b is supported by a body side member part 3b, each engine mount 2 is placed between the body side member 3b and a bracket 7 which is fixed to an inner part of the member 3b so that the axial line of respective engine mounts 2 extends laterally along the vehicle body. A through bolt 5 is passed through a dig hole 3d and a bolt hole 3c of the body side member part 3b, a center hole of the inner cylinder 2b and a bolt hole 7b of the bracket 7.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention has a cylindrical shape including an outer cylinder and an inner cylinder coupled to the outer cylinder via an elastic body, and the outer cylinder is fixed to an engine. The present invention relates to a support structure used for supporting the inner cylinder of an engine mount by a side portion of a vehicle body.

(Prior art) As a support structure for the above-mentioned engine mount, conventionally,
For example, there is a support structure as shown in Fig. 6, described in page B-133 of the middle part of Service Bulletin No. 588 (LIA2-1) published by Nissan Motor Co., Ltd. in September 1988. Each of the inner cylinders 2b of the three cylindrical engine mounts 2, which includes an outer cylinder 2a to be fixed and an inner cylinder 2b connected to the outer cylinder via an elastic body (not shown), is connected to the car body 3 (left side in the figure). (only the front part is shown)
In order to be supported by the body side member part of the engine room side part 3a, the engine mounts 2 are arranged so that their axes extend in the longitudinal direction of the vehicle body, and the inner cylinders 2b and the inner cylinders are Through-bolts 5 are inserted into brackets 4 provided at three locations on the body side member portion of the engine room side portion 3a so as to sandwich 2b, and these through-bolts 5 are fixed to the bracket 4 with nuts 6. .

By the way, when installing the engine l in the car body 3,
As shown by the arrow in Figure 7, the vehicle body 3 is viewed from above the engine l.
Since the engine 1 is lowered or raised from below the vehicle body 3 and placed in the engine room as shown by the imaginary line in the figure, the work is to support the engine mount 2 on the side 3a of the engine room of the vehicle body 3. Do this by inserting your hand from below the vehicle body 3.

In the conventional support structure described above, this support work cannot be performed for engine mounts 2 such as the one shown in the lower left of FIG. 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 a nut 6. However, for engine mounts 2 that do not have a working space below where the through bolt 5 can be inserted into the bracket 4 on the vehicle body side, such as the one shown in the lower right of Fig. 6 and the one shown in the upper part of the same figure. As shown in Fig. 7, the inner cylinder 2b is passed through the bracket 4 in advance and attached with bolts 5 and nuts 6, or the outer cylinder 2a is fixed to the engine l with bolts in advance, and the engine l is placed in the engine room. After it is installed, in the former case, the outer cylinder 2a is fixed to the bracket on the engine 1 side with multiple bolts, and in the latter case, the engine mount 2 is temporarily fixed to the bracket 4 using a temporary jig, and then the outer cylinder 2a is fixed to the vehicle body 3. The procedure was to insert the through bolt 5 into the bracket 4 by inserting the hand from above, fix the through bolt 5 to the bracket 4 with the nut 6, and then remove the temporary jig.

(Problem to be Solved by the Invention) However, in the support work of the engine mount based on such a conventional support structure, even if there is a work space below where the through bolt 5 can be inserted into the bracket 4 on the vehicle body side, It is necessary to insert the through bolt 5 into the bracket 4 and tighten the nut 6 there in the narrow space of the engine room, which causes the problem of extremely poor workability. If there is no working space below where the outer cylinder 2a can be inserted, the former requires time and effort to tighten multiple bolts to secure the outer cylinder 2a, and the latter also requires a lot of work in the engine room. Because it is necessary to insert the through bolt 5 into the bracket 4 and tighten the nut 6 there in a narrow space, work efficiency is extremely poor, and additional effort is required to attach and detach the temporary anchorage to the engine mount 2. There was a problem that it took a while.

These problems have hindered the reduction of line takt time on automobile production lines and have hindered the automation of engine mounting work.

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

(Means for Solving the Problems) An engine mount support structure of the present invention has a cylindrical shape including an outer cylinder and an inner cylinder coupled to the outer cylinder via an elastic body, and the outer cylinder is connected to the engine. The inner cylinder of a fixed engine mount is supported by a side part of the vehicle body, and the engine mount is arranged so that its axis extends in the left-right direction of the vehicle body, and the inner cylinder is supported from the outside of the side part of the vehicle body. The vehicle is characterized in that a through bolt inserted into the inner cylinder is fixed to the side portion of the vehicle body.

Further, in the present invention, provided on the side portion of the vehicle body,
The bracket for supporting the inner cylinder may be formed with an inclined guide part that slides into contact with the inner cylinder and guides the introduction of the inner cylinder into the bracket when the engine is mounted on the vehicle body. .

(Function) In such a support structure, with the engine mount arranged so that its axis extends in the left-right direction of the vehicle body, a through bolt is inserted into the inner cylinder from the outside of the vehicle body side. Since the through bolts are fixed to the side of the vehicle body, when mounting the engine on the vehicle body, the work of supporting the engine mount on the side of the vehicle body is performed from the outside of the side of the vehicle body.

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 carried out using a sufficiently wide space outside the side of the vehicle body, which greatly improves work efficiency. After the engine is placed in the engine room, the inner cylinder of each engine mount can be supported by always tightening one through bolt, so when supporting the engine, it is necessary to tighten multiple bolts for each engine mount. In addition to eliminating the need for temporary jigs, the labor of installing and removing temporary jigs can be saved.From these points, it is possible to significantly shorten the line takt time on the automobile production line, and reduce the time required for engine mounting work. can be easily automated.

A bracket provided on the side of the vehicle body for supporting the inner cylinder is provided with an inclination that slides into contact with the inner cylinder and guides the introduction of the inner cylinder into the bracket when the engine is mounted on the vehicle body. By forming the guide portion, the inner 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 of supporting the engine mount on the side of the vehicle body is further improved, and the line takt time can be shortened and the automation of engine mounting work can be further facilitated.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a plan view showing an embodiment of the engine mount support structure of the present invention, and the same parts as shown in FIG. 6 are designated by the same reference numerals.

That is, in the figure, 1 is the engine, 2 is the three engine mounts supported on the side of the car body, 3 is the car body (in the figure, only the front part is shown with the left side being the front of the car body), and 3a is the engine of the car body 3. On the side of the room, 5 indicates a through bolt and 6 indicates a nut.

Further, FIGS. 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 part 3a, and FIG. 4 is taken along the line IV-IV in FIG. As shown, each engine mount 2 has a cylindrical shape and includes an outer cylinder 2a and an inner cylinder 2b connected 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 body side member portion 3b having a box-shaped cross section and extending in the longitudinal direction of the vehicle body is formed in a part of the engine room side portion 3a.
A bracket 7 is fixed to the inside of the engine compartment b by spot welding.

Here, the bracket 7 has a hat-shaped cross section as shown in FIG. 3, and is open at the bottom as shown in FIG. 4, and the open end is slightly bent outward and has a free end. The guide portion 7a is inclined so that the opening width increases as it approaches the edge.

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

Therefore, in the support structure of this embodiment, in order to support each inner cylinder 2b of the three engine mounts 2 by the body side member part 3b of the engine room side part 3a of the vehicle body 3, the engine mounts 2 are The brackets 7 are arranged between the brackets 7 and the body side member parts 3b so that their axes extend in the left-right direction of the vehicle body, and one through bolt 5 is connected to the left and right body side member parts 3b for each engine mount 2. from the outside into each tool hole 3d and bolt hole 3c, the center hole of the inner cylinder 2b of each engine mount 2, and the bolt hole 7b of the bracket 7. It is fixed to the member portion 3b and the bracket 7.

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 the arrow in FIG. As shown by the imaginary line in the figure, when the engine mount 2 is placed in the engine room, the work of supporting the engine mount 2 on the side 3a of the engine room 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 l.
By fixing the outer cylinder 2a of each engine mount 2 to the engine 1 in advance with a plurality of bolts at the predetermined position of Then, when the engine I is placed in the engine room, the inner cylinder 2b of each engine mount 2 is guided by sliding contact with the guide part 7a, and each bracket 7 and the body sight member part are attached. 3b and its inner cylinder 2b.
align the center holes of the tool holes 3d and bolt holes 3c with the bolt holes 7b of the bracket 7, and then insert each through bolt 5 from the outside of the left and right body sight member parts 3b into each of the tool holes 3d and bolt holes 3C. , each engine mount 2
The nuts 6 are inserted into the center hole of the inner cylinder 2b and the bolt hole 7b of the bracket 7 sequentially, and then inserted into the top or bottom of the vehicle body and screwed into the tip of each through bolt 5. While stopping the rotation with a wrench,
As shown in the figure, a box wrench 8 is inserted from the outside of the left and right body side member parts 3b into the closed section of the body side member part 3b through each tool hole 3d, and the through bolts 5 are tightened with the box wrench 8. The above supporting work is performed by fixing the through bolt 5 to the body side member portion 3b and the bracket 7 with the nut 6.

Note that the nut 6 is attached to the bracket 7 in advance, and the bolt hole 7 is
Align it with b and fix it by welding, then insert the through-hole 5
may be supplied and tightened using a normal automatic screw tightening machine. In this way, the work of supporting the engine mount 2 on the engine compartment side portion 3a of the vehicle body 3 can be easily automated.

Therefore, according to the support structure of this embodiment, the work of supporting the engine mount 2 on the side part 3a of the engine room can be carried out using a sufficiently wide space outside the side part 3a of the engine room, so the work efficiency is greatly improved. Moreover, as a result, the inner cylinder 2b of each engine mount 2 can be supported by always tightening one through bolt 5 after the engine 1 is placed in the engine room, so when supporting the engine, the engine It is no longer necessary to tighten multiple bolts for each mount 2, and a plate jig is not required, which saves the effort of attaching and detaching the jig. From these points,
The line takt time of an automobile production line can be significantly shortened, and engine mounting work can be easily automated.

Here, since the guide portion 7a is formed on the bracket 7 for supporting the inner cylinder 2b of the engine mount 2,
When housing the engine l in the engine room, the inner cylinder 2b can be easily introduced between the bracket 7 and the body side member part 3b, and the workability of supporting the engine mount 2 on the engine room side part 3a is improved. Further improvements can be made, making it easier to shorten line takt time and automate engine mounting work.

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

Incidentally, if each tool hole is located within the wheel house, the problem of appearance does not arise when the tire is mounted. Furthermore, if the tool holes are not located within the wheel house, this can be solved by attaching the front fender after the engine is mounted.

(Effects of the Invention) Thus, 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 carried out using a sufficiently wide space outside the side of the vehicle body, so the work efficiency is greatly improved. Moreover, this allows the inner cylinder of each engine mount to be supported by always tightening one through bolt after the engine is placed in the engine room, so when supporting the engine, multiple bolts are required for each engine mount. In addition to eliminating the need to tighten bolts, it also eliminates the need for temporary anchorages and saves the trouble of attaching and detaching them.From these points, it is possible to significantly shorten the line takt time of the automobile production line. , it is possible to easily automate engine mounting work.

A bracket provided on the side of the vehicle body for supporting the inner cylinder is provided with an inclination that slides into contact with the inner cylinder and guides the introduction of the inner cylinder into the bracket when the engine is mounted on the vehicle body. By forming the guide portion, the inner 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 of supporting the engine mount on the side of the vehicle body is further improved, and the line takt time can be shortened and the automation of engine mounting work can be further facilitated.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the engine mount support structure of the present invention, and FIGS. 2 and 3 show one of the three engine mounts and a part of the side of the engine room in the above support structure. A plan view and a side view, FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 7 is an explanatory view showing an engine mount support operation based on the conventional support structure described above. 1゛Engine 2・-Engine mount 2a'
°Outer cylinder 2b-inner cylinder 2cm elastic body
3--Vehicle body 3a--Engine room side 5-Through bolt 6-Nut 7-Bracket 7a'Guide part Fig. 5d Fig. 6

Claims (1)

[Scope of Claims] 1. An engine mount having a cylindrical shape comprising an outer cylinder and an inner cylinder coupled to the outer cylinder via an elastic body, and the inner cylinder is fixed to an engine. In a structure in which the engine mount is supported by a side portion of the vehicle body, the engine mount is arranged so that its axis extends in the left-right direction of the vehicle body, and a through bolt inserted into the inner cylinder from the outside of the side portion of the vehicle body is inserted into the inner cylinder from the outside of the side portion of the vehicle body. An engine mount support structure that is fixed to the engine mount. 2. A slope provided on the side of the vehicle body for supporting the inner cylinder, which slides into contact with the inner cylinder and guides the introduction of the inner cylinder into the bracket when the engine is mounted on the vehicle body. 2. The engine mount support structure according to claim 1, further comprising a guide portion formed therein.