JPS60125430A - Bush for engine mound - Google Patents

Abstract

PURPOSE:To enable improvement of vibration damping capacity, by a method wherein vibration absorbing rubber, with which a gap between an inner and an outer cylinder is filled and which is adhered to the cylinders, is formed so that linear spring property is obtained. CONSTITUTION:In a gap part 6 positioned on the side in the direction in which the load of an engine is applied, a conical first stopper part 8 is formed in a manner that it is protruded from an outer cylinder 2, and a conical second stopper part 9 is formed in the shape of bridge inside the first stopper part 8. In this consitution, a contact surface 4a firstly is brought into contact with the second stopper part 9 according to a bending amount of the vibration absorbing rubber body 4, secondly the second stopper part 9 is bent and is brought into contact with the first stopper part 8 to produce linear load-bending property.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] This invention relates to an improvement in a bushing for an engine mount of an automatic blood vessel.

[Prior art and its problems] As is well known, in order to support the engine 2x body of a self-breathing engine, it is normal to valve a down bushing which is an anti-camera body to elastically support it, and as a mounting bush for this purpose, for example, The structure shown in Fig. 41 is available. This mount bush 1 has an outer cylinder 2 connected to the engine side.
, an inner cylinder 3 which is eccentrically arranged in the outer cylinder 2 and connected to the maternity leave 1111, and a vibration-proof rubber body 4 which is filled between the inner and outer cylinders, and is made of anti-pregnancy rubber. In the body 4, substantially arc-shaped portions 211 5.6 are formed at substantially opposite positions sandwiching the inner part II3, and furthermore, a stopper part 7 is formed on the inner periphery of the outer cylinder on the side of the gap ff1s6.

This work is not mount pushy 3. With Vc, the static load of the engine acts on the inner cylinder 3, which moves toward the cavity 6 and becomes almost concentric with the outer cylinder 2. Demonstrates a shaking effect.

By the way, if we look at the load-deflection characteristics of the mount bushing mentioned above, we can see that the line #l in Figure 3 shows the contact surface 4.
Although it becomes linear after the 2nd point where a hits the stopper part 7, it hardly depends on the 1@ shape and 1 until it reaches the 2nd point.

This means that the spring constant changes by one degree, but if we look at the relationship between the spring constant and the roll of the engine, we will see that as the spring constant changes, the roll of the engine changes. As the rigidity fluctuates, the vibration damping performance inherent to the mount bushing, as well as the vibration damping performance in the practical Ba range such as when starting, accelerating and decelerating, as shown in the shaded area in Figure 4, deteriorates. I don't like it. Here, engine roll refers to a phenomenon in which the engine swings around the horizontal axis in the anterior and posterior blood circulation.

OBJECT OF THE INVENTION] I am not aware of the above-mentioned points of this invention, and I have devised to make the above-mentioned spring characteristics linear. [Configuration of the Invention] In the present invention, a part of the chevron-shaped stopper (projecting from the outside) is formed in the cavity of -1000, and a part of the first stopper (part of the circle) It is characterized in that a part of the second stopper r is formed.

〔Example〕

Hereinafter, a specific embodiment of the present invention will be described and explained based on the drawings. However, the same part V as the conventional example explained earlier
C shall be given the same reference numeral.

In other words, a mountain-shaped first stopper part 8r is formed protruding from the outer cylinder 2 in the hollow part 6 located on the side in the direction of load application of the engine as shown in FIG. Of the stoppers ms, 11 are AA stoppers of the same < 11.1 shape, and a part 9r is formed in the shape of a bridge.

In this L-connected configuration, firstly, the contact surface 4a of the anti-vibration rubber body 4 hits the second strut (part 9), and then the second strut 9 bends and hits the first stopper part 8, and the load-deflection characteristic becomes linear as shown by the solid line in Figure 3. Therefore, the relationship between the spring constant and the roll angle of the engine is also This is shown by the solid line in Figure 4, and especially the practical 9s mentioned above.
The vibration iJJ damping performance in the area will be improved.

[Effects of the Invention] By applying the method described in detail above to the present invention, linear spring characteristics can be obtained, thereby improving vibration damping performance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of a conventional engine mount bushing; Fig. 2 is a sectional view showing an embodiment of the present invention;
The figure shows the load-deflection characteristics of the engine mount bushing, and FIG. 4 also shows the relationship between the spring constant and the roll angle of the engine. 2...Outer cylinder, 3...Cylinder, 4...Vibration-proof rubber body, 5
．． 6...Empty 1lfiL portion, 8...Part of the stopper of the assembled L, 9...Part of the second stopper. 2 people Figure 1 Figure 2

Claims (1)

[Claims] A vibration-proof rubber body is filled between the outer cylinder and a circular surface eccentrically arranged inside the outer cylinder, so that when the static load of the engine is applied, the outer cylinder and the inner surface are moved relative to each other. move llf
An engine mount bushing configured such that two parts are substantially concentric, and the most protective rubber body has an inner fl.
'i1M' is formed with a substantially arc-shaped air space r on each side, which are almost opposite to each other, and a mountain-shaped 6! A bushing for an engine mount in which a stopper L1 (1flX) is formed protruding from the outer cylinder side, and a chevron-shaped stopper (4L2) tJk is further formed inside a part of the first stopper.