JPH0749099Y2 - Car engine mount - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an engine mount for an automobile.

(Prior Art) When an engine is mounted on an automobile, an engine mount is used. The engine mount is formed so as to elastically (elastically) support the engine with respect to the body (for example, Japanese Utility Model Laid-Open No. 56-117141). A conventional engine mount is formed and used, for example, as shown in FIGS. 2 to 5.

Second, which schematically shows how the engine is mounted on the automobile
Referring to the drawings, the engine 2 is mounted on the body 4 so that the cylinder arrangement direction, that is, the axial direction, which is the direction in which the crankshaft extends, and the front-back direction indicated by the arrow P-P of the body 4 substantially coincide with each other. It is mounted, but at this time, in order to prevent its vibration from being transmitted to the body 4, the engine mount 1 elastically supports the body 4 as shown in FIG. Normally, the engine mount 1 includes two front first engine mounts 1a mounted on both side surfaces of the engine 2 and a mission case.
One rear second engine mount 1b mounted on 21
Consists of.

Next, a specific configuration of the first engine mount 1a will be described with reference to FIG. 4 showing a state where the first engine mount 1a is viewed from each direction. The two first engine mounts 1a are located substantially symmetrically with respect to a vertical plane including the axis of the engine and have substantially the same structure.

The engine mount 1a includes an engine-side mounting bracket (also referred to as a stabilizer) 3, a body-side mounting bracket 5, and
An elastic member 6 that elastically connects the mounting brackets 3 and 5
With. The engine-side mounting member 3 and the body-side mounting member 5 are attached to the engine 2 and the body 4, respectively, via an engine mount bracket (not shown).

The engine-side mounting member 3 is formed in a box shape having an opening, and the body-side mounting member 5 is formed so as to have a so-called U-shaped vertical cross section, and both are arranged in a nested shape. That is, the tip portions 9, 10 of the mounting bracket 5
Is inserted into the box-shaped mounting bracket 3 through the opening of the mounting bracket 3, and is disposed inside the mounting bracket 5. As a result, the tip portions 9 and 10 of the body-side mounting member 5 contact the inner wall of the engine-side mounting member 3 when the engine-side mounting member 3 is displaced in the PP direction, which is the front-back direction of the body 4. The tip end portions 9 and 10 of the mounting member 5 and the inner wall of the mounting member 3 function so as to prevent a large displacement of the engine 2.

On the other hand, the second engine mount 1b has a cylindrical member 36 extending in a direction perpendicular to the PP direction, which is the front-back direction of the body 4, as shown in FIG. 3 in a side view and FIG. 5 in a perspective view.
A rubber member 37, a bar member 38, and a mounting plate 39 mounted at a right angle to the bar member 38. Second
The mounting plate 39 of the engine mount 1b is attached to the bracket 40 of the mission case 21.

As described above, the engine 2 is connected to the body 4 by the two first engine mounts 1a and one engine mount 1b.
By virtue of being elastically connected to the vehicle, it is possible to prevent the vibration of the engine 2 from being transmitted to the vehicle interior, and it is possible to minimize the relative displacement amount of the engine 2 with respect to the body 4 during normal traveling.

(Problems to be solved by the invention) By the way, when the vehicle is traveling forward as shown by an arrow F in FIG. 2 and accidentally collides with an obstacle, the inertial load of the engine itself may be increased depending on the degree. Since it is large, the engine 2 may be displaced excessively with respect to the body 4. Therefore, in the above-described conventional engine mount, the plate thickness of the tip portions 9 and 10 of the mounting bracket 5 of the first engine mount 1a is increased to increase the rigidity and
The engine mount 1b of the transmission case 21 is thickened to increase the rigidity by increasing the thickness of the bracket 40 and the mounting plate 39, thereby receiving a large load that causes the excessive displacement and suppressing the excessive displacement. It was

However, the engine 2 is excessively displaced with respect to the body 4 due to a special situation, and in normal traveling, the inertia load for displacing the engine 2 with respect to the body 4 is small. Metal tip part 9,1
The displacement of the engine 2 with respect to the body 4 can be sufficiently restricted within a predetermined range without increasing the rigidity of the bracket 40 and / or the mounting plate 39. In other words, in the conventional engine mount, the plate thickness and the wall thickness of each part are increased to increase the rigidity for a special case, resulting in an increase in the weight and cost of the entire vehicle.

Therefore, the technical problem of the present invention is to suppress the excessive displacement of the engine with respect to the body without increasing the rigidity by increasing the plate thickness of the stopper or bracket of the mounting bracket.

(Means for Solving the Problems) The present invention is a box-shaped first mounting member for mounting on an engine having a front wall and a rear wall that are spaced in the front-rear direction of the body, and a lateral opening, and a body. An engine mount for a vehicle, comprising: a second mounting member attached to the first mounting member; and an elastic member arranged between the first mounting member and the second mounting member. The second mounting member is inserted into the first mounting member from the opening of the first mounting member and extends substantially horizontally in the front-back direction of the body. A first stopper capable of contacting the front wall and the rear wall, a first mount plate extending forward from the front wall of the first mounting member, and a rear side of the rear wall of the first mounting member. An extending second mount plate and abutment with the front wall of the first mounting member that projects from the first mount plate in the lateral direction of the body and extends substantially horizontally in the longitudinal direction of the body. A possible plate-shaped second stopper and the rear wall of the first fitting, which projects from the second mount plate in the lateral direction of the body and extends substantially horizontally in the longitudinal direction of the body. Flat that can abut And a Jo third stopper.

(Operation) The displacement of the engine with respect to the body during normal traveling is mainly regulated by the first mounting member and the first stopper of the second mounting member of the engine mount of the vehicle according to the present invention. It is regulated by an engine mount located outside, behind the engine.

When the engine tends to be displaced excessively with respect to the body, the displacement of the engine with respect to the body is caused by the first mounting bracket and the first to third stoppers of the engine mount of the automobile according to the present invention. It is also regulated by the engine mount, which is arranged behind the engine, outside the present invention.

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

Referring to FIG. 1 showing an essential part of an embodiment of an automobile engine mount according to the present invention, an engine mount 1a includes a mounting bracket 3 mounted on an engine 2, a mounting bracket 5 mounted on a body 4, and An elastic member 6 arranged between the mounting members 3 and 5 and connecting both mounting members 3 and 5 is provided. The engine mount 1a is used in place of the engine mount 1a shown in FIG.

The mounting bracket 3 on the engine side is formed into a box shape by a front wall 3A and a rear wall 3B that are spaced from each other in the front-rear direction of the body 4, and an upper wall 3C and a lower wall 3D that are vertically spaced from each other. Has an opening 3E.

In the illustrated embodiment, a mounting member 7 for an elastic member is arranged inside the mounting member 3, and the mounting member 7 and the mounting member 5 on the body side are elastically connected via an elastic member 6. There is. A mounting bolt 8 and a positioning protrusion 16 are fixed to the mounting member 7. On the other hand, the mounting bracket 3 on the engine side has a hole 18 through which the mounting bolt 8 passes.
And a hole 17 through which the protrusion 16 penetrates, and the mounting bolt 8
And the projection 16 are inserted into the holes 18 and 17, respectively, and are projected outward to be assembled. The mounting bracket 3 on the engine side is mounted on the engine 2 with mounting bolts 8.

The body side mounting member 5 is formed so that the vertical cross-sectional shape of the central part has a U shape, and the first stoppers 9 and 10, the first mount plate 20, and the second mount. The plate 21, the second stopper 52, and the third stopper 53 are provided.

The first stoppers 9 and 10 are telescopically inserted into the mounting bracket 3 through the opening 3E of the mounting bracket 3 on the engine side, and can come into contact with the respective walls of the mounting bracket 3. As a result, the stoppers 9 and 10, in combination with the mounting member 3, cause the rolling displacement of the engine 2 with respect to the body 4, that is, the displacement in the direction of the arrow Q-Q in FIG. 1A and the longitudinal displacement of the body 4, that is, the first displacement. It functions to regulate the displacement in the direction of arrow P-P in FIG. The stoppers 9 and 10 are arranged so as to extend substantially horizontally in the arrow P-P direction which is the front-back direction of the body 4.

A rubber member 45 is attached to the upper surface of the stopper 9 and the lower surface of the stopper 10. These rubber members 45 are stoppers 9 and 10.
This reduces the shock when the and the mounting bracket 3 on the engine side come into contact with each other due to the rolling displacement.

As shown in FIG. 1 (b), the first mount plate 20 extends forward from the front wall 3A of the engine-side mounting member 3, and the second mount plate 21 is the rear wall of the mounting member 3. It extends rearward from 3B and extends from the mounting bracket 3. Bolt holes 51 and 50 are formed in the mount plates 20 and 21, respectively, and bolts (not shown) for attaching the body side mounting bracket 5 to the body 4 are inserted into these bolt holes 51 and 50. It

The second stopper 52 extends from the mount plate 20 to the body 4
Of the flat plate extending substantially horizontally in the P-P direction, which is the front-back direction of the body 4, and is capable of contacting the front wall 3A of the mounting bracket 3 on the engine side. Is. On the other hand, the third stopper 53 is a flat plate-like member that projects from the mount plate 21 in the lateral direction of the body 4 and extends substantially horizontally in the front-rear direction of the body 4, and is attached to the rear wall 3B of the mounting bracket 3. Abutable.

Next, the operation of the engine mount 1a described above will be described.

Since the engine 2 is elastically supported by the body 4 by the front two engine mounts 1a according to the present invention and the rear one engine mount 1b as in the conventional case,
The vibration transmitted from the engine 2 to the body 4 is absorbed by the engine mounts 1a and 1b, and a vibration damping effect is obtained.

During normal traveling, the displacement of the engine 2 in the body front-rear direction indicated by the arrow P-P is mainly caused by the first stoppers 9 and 10 of the body-side mounting member 5 and the front wall 3A or the rear of the engine-side mounting member 3. It is regulated by contact with the wall 3B,
Further, the amount of displacement of the engine 2 with respect to the body 4 during normal traveling is restricted to a minimum by being regulated by the rear engine mount. In this case, since the stoppers 9 and 10 extend substantially horizontally in the front-back direction of the body, which is the same direction as the displacement direction of the mounting bracket 3 on the engine side,
It comes into contact with the mounting bracket 3 on the engine side in the state of the highest rigidity.

Next, when a vehicle traveling forward as shown by arrow F accidentally collides with an obstacle and the engine 2 tries to displace excessively with respect to the body 4 due to its own large inertial load, The displacement is caused by the front wall 3A or the rear wall 3B of the engine-side mounting member 3 and the first stoppers 9 and 10 of the body-side mounting member 5 contacting each other. 3A and the second stopper 52 of the mounting bracket 5 on the body side contact, or the rear wall 3B of the mounting bracket 3 on the engine side and the third stopper 53 of the mounting bracket 5 on the body side contact. Is regulated jointly by the engine mount and is regulated by the rear engine mount, so that an excessive displacement of the engine 2 with respect to the body 4 is suppressed. In this case, the first stoppers 9 and 10, the second stopper 52 and the third stopper 53 are substantially horizontal in the front-rear direction of the body 4, which is the same direction as the displacement direction of the mounting bracket 3 on the engine side. Growing and the second
Since the stopper 52 and the third stopper 53 are flat plates, they come into contact with the mounting bracket 3 on the engine side in the highest rigidity.

(Effect of the Invention) The first stopper of the mounting bracket on the body side extends substantially horizontally in the front-rear direction of the body, and the first stopper can abut against the front wall or rear wall of the mounting bracket on the engine side. Therefore, when the engine is displaced in the front-rear direction during normal traveling, the first stopper comes into contact with the mounting bracket on the engine side with the highest rigidity. This makes it possible to increase the resistance to the displacement of the engine and reduce the displacement of the engine.

When the vehicle accidentally hits an obstacle and the engine tries to displace it excessively with respect to the body due to its own large inertial load, the front wall or rear wall of the engine side mounting bracket and the body side mounting bracket When the first stopper abuts, the front wall of the engine-side mounting bracket and the second stopper of the body-side mounting bracket abut, or when the engine-side mounting bracket rear wall and the body side contact. The third stopper of the mounting bracket on the side comes into contact with the first stopper and the second stopper or the third stopper to jointly bear a large load exerted by the engine to regulate the displacement. And the first to third stoppers of the body side mounting member are substantially in the front-back direction of the body, which is the same direction as the displacement direction of the engine side mounting member. Since it extends horizontally and abuts against the mounting bracket on the engine side with the highest rigidity, it is possible to suppress excessive displacement of the engine without increasing the plate thickness of the first to third stoppers. it can.

The first to third stoppers of the mounting bracket on the body side
Since it extends substantially horizontally in the front-rear direction of the body, which is the same direction as the displacement direction of the engine-side mounting bracket, and comes into contact with the engine-side mounting bracket in the most rigid state, The thickness of the mounting bracket can be reduced. This can reduce weight and cost. In addition, as a result of the rigidity of the first to third stoppers of the mounting bracket on the body side of the engine mount of the vehicle according to the present invention being increased, the thickness of the mounting plate that connects the engine mount and the transmission mounted at the rear of the engine and It is possible to reduce the thickness of the bracket, which also reduces the weight.

Since the second and third stoppers of the body-side mounting member are flat plates, they can reliably contact the front wall and the rear wall of the engine-side mounting member, respectively, to receive the load.

[Brief description of drawings]

FIG. 1 shows essential parts of an embodiment of an automobile engine mount according to the present invention. (A) is a front view, (b) is a side view seen from the direction of arrow K in (a), (c). Is a side view seen from the direction of arrow L in (a), that is, a bottom view, FIG. 2 is a side view schematically showing the positional relationship between the body of the automobile and the engine, and FIG. 3 shows the mounting state of the engine mount. FIG. 4 is a side view of the engine, and FIG. 4 shows a main part of a conventional front engine mount. (A) is a front view, (b) is a side view seen from the arrow K direction of (a), (c). Is a side view viewed from the direction of arrow L in (a), that is, a bottom view, and FIG. 5 is a perspective view showing a main part of a rear engine mount. 1a …… Engine mount 2 …… Engine 3 …… Engine side mounting bracket 3A …… Front wall 3B …… Rear wall 3E …… Opening 4 …… Body 5 …… Body side mounting bracket 6 …… Elastic member 9, 10, 52, 53 …… Stopper 20,21 …… Mount plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-59-200835 (JP, A) Actually opened 56-155931 (JP, U) Actually opened 60-191734 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A first fitting for mounting on an engine and a second fitting for mounting on a body, which is a box type having front and rear walls and a lateral opening spaced apart in the front-rear direction of the body. And an elastic member disposed between the first mounting member and the second mounting member, wherein the second mounting member is the first mounting member of the first mounting member. A first stopper that is inserted into the first mounting member through the opening and that extends substantially horizontally in the front-rear direction of the body and that can come into contact with the front wall and the rear wall of the first mounting member; , The first
A first mount plate extending forward from the front wall of the mounting bracket, a second mount plate extending rearward from the rear wall of the first mounting bracket, and a lateral direction of the body from the first mount plate. To the front wall of the first mounting member, which extends substantially horizontally in the front-rear direction of the body and which can come into contact with the front wall of the first mounting member, and a body from the second mount plate. An engine of a motor vehicle provided with a third stopper in the form of a flat plate capable of contacting the rear wall of the first mounting member, the third stopper protruding in the lateral direction of the body and extending substantially horizontally in the front-rear direction of the body. mount.