JPH0448974Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to a transfer mount device for a four-wheel drive vehicle such as a one-box car, for example.

(Prior Art) With the spread of one-box four-wheel drive vehicles, the engines they are equipped with are becoming more powerful and the tires are becoming larger. Therefore, the input applied to the suspension of the vehicle is increased by 20 to 30% compared to conventional vehicles. For this reason, there is no problem during normal driving, but if you run over a curb or the like and excessive input is applied to the tire, the displacement of the transfer becomes large.
There is a risk of damage to the propeller shaft that works with this transfer.

Conventionally, therefore, a transfer mount has been installed as a means of regulating the displacement of the transfer, but this has caused problems in transmitting idle vibration to the vehicle body and centering during line rigging.

(Problems to be Solved by the Invention) As mentioned above, conventional transfer mounts have the problem of not being able to control vibrations during idling, oscillations during sudden starts and accelerations, and centering at the same time.

The purpose of this invention is to provide a transfer mount device for a four-wheel drive vehicle that has a simple structure, yet is able to reduce vibrations during idling, control oscillations during sudden starts and accelerations, and achieve centering. .

[Structure of the idea]

(Means and effects for solving the problem) This invention provides a transfer mount that is provided between an outer pipe having a mounting bracket that is attached to a side member, an inner pipe, and the outer pipe and the inner pipe. and an insulator with a low spring constant, and a support member for supporting the transfer is supported on the inner panel.

(Examples) Hereinafter, each example of this invention will be described based on the drawings.

1 to 3 show a first embodiment, in which reference numerals 1 and 1 indicate a pair of side members constituting a body frame of a four-wheel drive vehicle. A transfer 2 is provided between these side members 1 and 1, and 3 is a propeller shaft. The transfer 2 is supported by the side members 1, 1 by a transfer mount device.
That is, the transfer mount device is constituted by a pair of transfer mounts 4, 4 fixed to the side members 1, 1, and a support member 5 installed between the transfer mounts 4, 4. The support member 5 is provided with hangers 6 and 7, and the transfer 2 is supported by the hangers 6 and 7. Further, the pair of transfer mounts 4, 4 have the same structure,
It is constructed as shown in FIGS. 2 and 3. That is, 8 is a mounting bracket, and this mounting bracket 8 is fixed to the lower surface of the side member 1 by fixing bolts 9a, 9a. The mounting bracket 8 is integrally provided with an outer pipe 9 whose axis is directed in the longitudinal direction of the vehicle, and an inner pipe 11 is provided inside the outer pipe 9 via an insulator 10, which will be described later. A support shaft 12 is inserted into the inner pipe 11, and brackets 13 provided at the ends of the support member 5 are connected to both ends of the support shaft 12. Therefore, the support member 5 that supported the tongue sphere 2 is
Both ends thereof are elastically suspended from side members 1, 1 via transfer mounts 4, 4.

The insulator 10 of the transfer mount 4 is molded from an elastic rubber material, and the outer peripheral part 10a is connected to the outer pipe 9, and the inner peripheral part 1 is connected to the outer pipe 9.
0b is fixed to the inner pipe 11, and an inclined elastic deformation part 10c is integrally provided between the outer peripheral part 10a and the inner peripheral part 10b. As shown in FIG. 4, the spring characteristics of this insulator 11 are such that the spring constant is set to a low centering level near neutral to reduce idling vibration.

5 and 6 show a second embodiment, in which a substantially disc-shaped insulator 14 is provided between an outer pipe 9 and an inner pipe 11. FIG. This insulator 14 is a disc made of a rubber material with a narrow outer peripheral edge, and a gear-shaped elastic deformation part 15 on the outer peripheral edge to reduce the spring constant near neutral.

In this way, by lowering the spring constant of the transfer mounts 4, 4, which suspend the transfer 2, to the level of centering near neutral, it is possible to reduce idling vibrations, thereby regulating oscillations during sudden acceleration. be able to. Moreover, when the tire runs on a curb or the like and an excessive input is applied to the tire, the displacement of the transfer 2 becomes large, but at this time the insulator 11 is compressed and the hitting noise can be reduced.

[Effect of idea]

As explained above, according to this invention, by setting the spring constant of the transfer mount to about the centering level near neutrality, it is possible to reduce vibration during idling, control oscillation during sudden acceleration, and reduce hitting noise. This has the effect of achieving both of the three points of reduction and centering.

[Brief explanation of the drawing]

1 to 3 are front views of a transfer mount device showing a first embodiment of this invention, and a second embodiment of the transfer mount device.
The figure is a front view of the transfer mount, Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is a graph showing spring characteristics, and Figures 5 and 6 are a second embodiment of this invention. Figure 5 shows the front view of the transfer mount, and Figure 6 shows the − of Figure 5.
It is a sectional view along a line. 1...Side member, 2...Transfer,
4...Transfer mount, 5...Support member, 8...Mounting bracket, 9...Outer pipe, 10...Insulator, 11...Inner pipe.

Claims (1)

[Scope of utility model registration request] A transfer mount for a four-wheel drive vehicle in which a transfer mount is provided on a pair of side frames constituting a vehicle body frame, a support member is constructed by connecting both ends to the transfer mount, and the transfer is supported on the support member. In the device, the transfer mount is provided between an outer pipe having a mounting bracket attached to the side member, an inner pipe to which the support member is connected, and the outer pipe and the inner pipe, and has a low spring constant near neutral. A transfer mount device for a four-wheel drive vehicle, characterized in that it is comprised of an insulator and an insulator.