JPS5923617Y2 - Support device for vehicle tower-mounted engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a support device for a vehicle tower-mounted engine.

Conventionally, a support device for mounting an engine on a vehicle is constructed as shown in FIGS. 1 and 2.

Figure 1 shows a rough cross-section at the front mound position of the engine, and as shown in the figure, the engine 01 is connected to the left and right mounds 03 by anti-vibration rubber via the left and right flat end brackets 02 and 02. Body structure by .03 04.0
Supported by 4.

Note that 03 a is the bracket, 03 b is the anti-vibration rubber, 03
C is a mounting metal fitting, and the mound 03 is composed of these members.

(See Figure 2) There are various types of support for engines that use vibration-proof rubber as the main component, but the principle is to lower the natural frequency of the engine as a rigid body supported by vibration-proof rubber. Accordingly, the purpose is to absorb the vibration excitation force generated inside the engine by the vibration isolating rubber while it is being transmitted to the vehicle body structure, thereby reducing the force transmitted to the vehicle body structure.

However, the conventional engine support device described above has both the role of supporting the static load of the engine and the role of reducing vibrational force, so in terms of the durability of the vibration isolating rubber, the engine There is a limit to how low the natural frequency can be made, and therefore a sufficient vibration damping effect cannot be achieved.

As a result of various studies aimed at solving the drawbacks of the conventional devices mentioned above, the present inventor focused on the phenomenon of torque fluctuation, which is the most important engine vibration force, and found that vibrations caused by the torque fluctuation We proposed this invention after confirming that by reducing engine roll vibration (rotation fluctuation around the longitudinal axis of the engine), it is possible to reduce the vibration transmission force from the engine to the vehicle body structure. , support frames having circular arc surfaces with a predetermined radius from the center of roll vibration of the engine mounted on the vehicle are installed on the left and right sides of the engine,
A roller member that can be moved on the circular arc surface is housed in the support frame, and the bottom surface of the support frame is mounted on the vehicle body, and the roller member is brought into contact with the engine side bracket. This invention relates to a support device for a vehicle-mounted engine, characterized in that the engine is supported on a vehicle body via the roller member and support frame.

The present invention will be specifically explained below with reference to an embodiment shown in FIG.

In the figure, 1 is an engine, 2 is a pair of brackets protruding from the lower part of the outer side of the engine 1, 3 is a mount attached to each of the brackets 2, and 4 is the bracket 2, the mount 3, and the roller member 5. The engine 1 is connected via a pair of marant support frames 6 built in as shown in the figure.
The supporting surface of the mount support frame 6 of the same vehicle body structure 4, together with the seat surface of the mount support frame 6, is a circle having a radius of curvature R centered on the rotation center A of the roll vibration of the engine 1. The roller member 5 in the mount support frame 6 rolls on the inner surface of the mount support frame 6, which draws an arc with a radius R centered on the rotation center A of the roll vibration of the engine 1. It looks like this.

The weight of the engine 1 is equally supported by the left and right vehicle body structures 4 via the left and right brackets 2, mounts 3, roller members 5, and mount support frames 6.

Further, roll vibration of the engine 1 is restrained by a pair of elastic springs 7 and 7' disposed between the roller member 5 in the mount support frame 6 and the mount support frame 6 as shown in the figure. 5 and the contact portions of the elastic springs 7 and 7' have a structure that does not restrict the rotation of the roller member 5.

The elastic springs 7,7' then form a means for restraining roll vibrations of the engine.

In addition, in order to prevent the engine 1 itself from coming off upward, the flange portions 3a of the mounts 3 are connected at their ends with pins to the upper ends of both side walls of each mount support frame 6, and are prevented from rotating upward by springs 10. It is restrained via rollers 8 attached to the inside of the restraining frame 9 as shown in the figure.

One embodiment of the engine support device of the present invention is configured as described above, and the roller member 5 in the mount support frame 6 is formed into a circular arc having a predetermined radius of curvature R from the rotation center A of roll vibration of the engine 1. Since the roll vibration of the engine is restrained by the roll vibration restraining means 7, 7', the roll vibration frequency transmitted from the engine 1 to the vehicle body structure 4 is reduced, and therefore the engine The vibration transmission force to the vehicle body structure 4 of 1 is reduced.

Since the engine support device of the present invention has the above-described configuration and operation, the present invention has the practical effect of realizing an engine support device that eliminates the drawbacks of the conventional devices described above. Can be done.

Next, other embodiments of the present invention shown in FIGS. 4 to 6 are as follows.
Instead of the mount 3 in the above embodiment, as shown in FIG.
A member 3' is used, which consists of a top part 3a, a middle part 3b, and a lower part 3C, and on both sides of the lower part, roller members as shown in FIG. , the mount support frame 6' is formed with four sides closed as shown in FIG.
'a and lower side 6'b are rotation center A of engine roll vibration
The left and right sides 6'C, 6'd of the mount support frame 6', the left and right round bars 11 of the member 3',
An elastic spring (for example, an air spring) 7a is used as a roll vibration restraining means between the ball bearing 12 at the front and rear ends of the roller 11.
, 7'a are provided, and the mount support frame 6' is fixed to the vehicle body structure 4, which is different from the above-mentioned embodiment, but the same effects can be achieved.

Note that as the elastic springs 7a and 7'a, hydraulic or other ordinary vibration-proof rubber may be used.
, 7'a may be interposed between the round rods 11 on both sides of the member 3' and the mount support frame 6'.

Furthermore, the upper side 5'a and the lower side 6' of the mount support frame 6'
It is desirable to line the portion of the ball bearing 12 that slides with the ball bearing 12 with rubber or the like in order to avoid metal-to-metal contact.

Moreover, instead of the elastic spring 7,7' of the above embodiment, this is formed by a cylinder 15 and a piston 18 with a holed disc 17 (see FIG. 8) inserted into the cylinder 15.
It is also possible to use one in which the viscous fluid 16 is sealed.

Furthermore, as shown in FIG. 9, the cylinder 1 having the above configuration
5 may be connected to each other through a communication pipe 19,
In this case, the disc 17 does not need to be provided with holes.

[Brief explanation of the drawing]

1 and 2 are implicit explanatory views of a conventional engine support device, with FIG. 1 being a front view and FIG. 2 being a perspective view of the mount. FIG. 3 is a schematic explanatory front view of one embodiment of the present invention, FIGS. 4 to 6 are schematic explanatory diagrams of other embodiments of the present invention, FIG. 4 is a front view of main parts, and FIG. is a perspective view of the mount, FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5, FIGS. 7 and 8,
FIG. 9 shows a schematic diagram of another example of the engine roll vibration restraining means interposed between the mount support frame and the roller member, respectively. In Figures 3 to 9, 1: engine, A: center of rotation of engine 1, 2 nib bracket, 3, 3': mount, 4: vehicle body structure, 5° 12:
Roller member, 6.6': Mount support frame, 7,7'. 13, 14.15.18: Engine roll vibration restraint means.

Claims (1)

[Scope of utility model registration request] Support frames having circular arc surfaces with a predetermined radius from the center of roll vibration of an engine mounted on a vehicle are installed on the left and right sides of the engine, and roller members that can be moved on the circular arc surfaces are housed within these support frames. The engine is supported on the vehicle body via the roller member and the support frame by placing the bottom surface of the support frame on the vehicle body and bringing the roller member into contact with the engine side bracket. A support device for a vehicle tower-mounted engine.