JPS5851054Y2 - Automotive power unit support structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a support structure for an automobile power unit.

A power unit consisting of an engine body and a transmission unit integrally connected to the engine body is normally supported at three points on the vehicle body side via mount rubbers, and this support is received by the shearing direction deformation of the mount rubbers in response to the pitching movement of the power unit. It is usually configured like this.

It goes without saying that it is preferable to use a low spring constant of the mount rubber to support the power unit in terms of vibration and noise, and conventionally, as mentioned above, it is preferable to use a low spring constant of the mount rubber to receive pitching motion by shearing. However, in order to deal with longitudinal vibrations of the inertial moving parts of the power unit, lowering the spring constant will cause the transmission to slip out of gear. The spring constant is high to suppress the amount of movement in the front and back direction.

This invention is for front-engine, front-drive vehicles, or rear-engine, rear-drive vehicles that are supported by three mounts and a pitching stopper at the front and rear.This invention prevents gear slippage and maintains a spring constant against all vibrations. The purpose of this invention is to significantly reduce vibration and noise by providing a mount structure that can be used at a lower height, and will be described below with reference to the accompanying drawings.

Figures 1 and 2 show an example of a rear engine, rear drive vehicle. In these figures, 1 is the engine body, 2 is the transmission, and these are attached to the vehicle body frame at three points: the rear mount 3.4 and the front mount 5. 8 and cross member 9, respectively.

Reference numeral 6 denotes a pitching stopper, and as shown in the figure, the pitching stopper 6 is displaced in the left-right direction by 12 degrees with respect to the longitudinal direction line CL passing through the center of gravity G of the power unit, and is disposed at a position extremely close to the change rod 7. The front mount 5 is disposed at a position displaced by 11 degrees to the opposite side of the pitching stopper 6 with respect to the above-mentioned CL.

In both figures, 9a t sb indicates a front mount bracket and a pitching stopper bracket provided on the cross member 9, and 10 indicates a suspension arm.

As described above, the present invention has a structure in which the front mount 5 and the pitching stopper 6 are arranged almost symmetrically with respect to the longitudinal line CL passing through the center of gravity of the power unit, with a distance of 131.132 mm left and right. Since the yawing movement of the power unit can be suppressed and the pitching stopper 6 is provided at almost the same position as the change rod 7, each mount 3, 4 and 5 can be used with a low spring constant against vibrations of the power unit in all directions. There is no need to worry about gears slipping out, and as a result, vibration and noise can be significantly reduced.

Furthermore, even in the case of a 4-axis drive type in which a propeller shaft is connected to an extension part 2a in front of the mission 2, the left and right sides of the extension part 2a are supported by a front mount 5 and a pitching stopper 6, so that
It is possible to suppress vibration of the extension portion 2a.

Although the illustrated embodiment shows an example in which the present invention is applied to a rear-engine, rear-drive vehicle, it goes without saying that the present invention can be similarly applied to a front-engine, front-drive vehicle.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a side view, Fig. 3 is an enlarged side view of the front mount part of Fig. 1,
FIG. 4A2 is an enlarged plan view and a side view of the pitching stopper portion of FIG. 1. 1...Engine body, 2...Mission, 3゜4...Rear mount, 5...
Front mount, 6...Pitching stop collar, 7...Change rod, 8...Vehicle frame, 9...Cross member.

Claims (1)

[Scope of utility model registration request] An engine body and a power unit such as a transmission connected to the engine are mounted on vehicle body members at two points on one side and one point on the other in the front and rear, and the mount on the one point side is connected to the front-rear direction line passing through the center of gravity of the power unit. A pitching stopper is provided at a position displaced by an appropriate distance in the left-right direction with respect to the CL, and a pitching stopper is provided at a position near the change rod that performs transmission gear change operation on the opposite side of the mount side with respect to the longitudinal direction line CL. A support structure for an automotive power unit featuring: