JPH067950Y2 - Radiator upper support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an upper support device for elastically supporting an upper end portion of a radiator for an internal combustion engine of an automobile with respect to a vehicle body frame of the automobile. .

[Conventional technology]

Since the radiator will jump upwards when the vehicle runs on a bad road or climbs on a step, when the radiator is attached to the body frame, the upper end of the radiator is It is necessary to elastically support it while preventing it from bouncing and wobbling in the horizontal direction.

Therefore, Japanese Patent Laid-Open Publication No. 60-27722 as a prior art discloses that a space is provided between a body side bracket attached to a vehicle body frame of an automobile and a radiator side bracket fitted in an upper tank of a radiator, and a body side is provided. An upper support device is proposed in which the bracket and the radiator-side bracket are connected by a pair of left and right rubber columns.

The upper support device of this prior art elastically supports the upper end of the radiator by elastically deforming a pair of left and right rubber columns that connect the body-side bracket and the radiator-side bracket. The rubber column is configured so that the spring constant when elastically deformed due to the jumping up of the radiator is reduced in proportion to the upward displacement position of the radiator, as indicated by reference character A in FIG. 2 of the publication. Alternatively, as indicated by the symbol B, the radiator is configured to be substantially constant with respect to the upward displacement amount.

[Problems to be solved by the device]

However, like the former, when the spring constant in both rubber columns decreases in proportion to the upward displacement of the radiator, the upward displacement in the case where the radiator jumps up cannot be restricted to a small value, In other words, the radiator jumps up greatly.

On the other hand, like the latter, the spring constants of both rubber columns are
If the radiator is almost constant with respect to the upward displacement, setting the spring constant to a small value only for the purpose of elastic support for the radiator limits the upward displacement when the radiator jumps up to a small value. In other words, the radiator will jump up greatly, and if the spring constants of both rubber columns are set to large values in order to reduce the jumping up of the radiator, the performance of elastic support for the radiator will be increased. Will be reduced.

Moreover, both rubber pillars in the above-described prior art upper support device are largely elastically deformed even with respect to the horizontal movement at the upper end portion of the radiator, so that the horizontal movement at the upper end portion of the radiator is reduced by a small value. It could not be regulated.

An object of the present invention is to provide an upper support device that solves these problems.

[Means for Solving the Problems]

In order to achieve this object, the present invention inserts a guide pin projecting downward from the upper surface of a radiator slidably into an inner diameter hole of an elastic bush made of rubber or the like fitted in a vehicle body frame of an automobile. While integrally forming a large-diameter flange portion that contacts the lower surface of the vehicle body frame on the outer periphery of the lower end of the body frame, a portion of the inner diameter hole of the bush on the lower surface side of the flange portion is The taper-shaped enlarged hole is formed so as to gradually expand toward the lower surface of the portion, and the lower surface of the flange portion extends from the opening edge portion of the enlarged hole to the lower surface of the flange portion toward the outer periphery of the flange portion. The configuration is such that it is an inclined surface that inclines obliquely upward.

[Action]

In this way, the guide pin protruding from the radiator is slidably inserted into the inner diameter hole of the bush made of an elastic body fitted to the body frame side, so that the horizontal movement of the upper end portion of the radiator is elastically supported. It can be regulated to a small value under the condition.

Further, by integrally molding a large-diameter flange portion abutting the lower surface of the vehicle body frame on the outer circumference of the lower end of the elastic bush, it is possible to prevent the radiator from jumping up by the flange portion. It is regulated by elastic deformation when it is compressed to that axis.

In this case, a portion of the inner diameter hole of the bush on the lower surface side of the flange portion is configured as a tapered enlarged hole that gradually increases the inner diameter of the portion toward the lower surface of the flange portion, and By configuring the lower surface of the flange portion as an inclined surface that is inclined obliquely upward from the opening edge portion with respect to the lower surface of the flange portion of the enlarged hole toward the outer periphery of the flange portion, when the radiator jumps up, The uppermost part of the inclined surface on the lower surface, that is, the opening edge portion of the expansion hole contacts the upper surface of the radiator, and the portion of the opening edge portion elastically deforms first. Since this is elastic deformation that gradually fills the gap between the hole and the guide pin, the spring constant at the time of this elastic deformation is small at the beginning and the gap is blocked. Gradually increases with the are,
When the gap is completely filled, the entire flange portion is elastically deformed thereafter, and the spring constant is further increased.

In other words, the spring constant in the direction in which the radiator bounces is the smallest initially and then increases in proportion to the amount of upward displacement of the radiator, so the amount of upward displacement when the radiator bounces is small under the condition of elastic support. The value can be regulated, that is, the radiator can be prevented from jumping up in a state of being elastically supported.

[Effect of device]

Therefore, according to the present invention, when the upper end of the radiator is elastically supported with respect to the vehicle body frame, the displacement of the upper end of the radiator in any of the vertical and horizontal directions does not impair the elastic support performance. The effect of being able to regulate to a small value is produced.

〔Example〕

An embodiment of the present invention will now be described with reference to the drawings. In the drawings, reference numeral 1 indicates a radiator, reference numeral 2 indicates a vehicle body frame of an automobile, and a guide pin 3 is projected upward from an upper surface of an upper tank 1a of the radiator 1. Further, the bracket 4 attached to the vehicle body frame 2 is provided with an engagement hole 5 at a position on the axis of the guide pin 3.

Reference numeral 6 denotes a bush made of an elastic material such as rubber that is detachably fitted in the engagement hole 5, and the guide pin 3 is slidably inserted into the inner diameter hole 7 of the bush 6, On the outer periphery of the lower end of the bush 6, a large-diameter flange portion 8 that contacts the lower surface of the vehicle body frame 2 is integrally formed.

By forming a portion of the inner diameter hole 7 of the bush 6 on the lower surface side of the flange portion 8 into a tapered enlarged hole 9 whose inner diameter is gradually enlarged toward the lower surface of the flange portion 8, A gap 10 is formed between the pin 3 and the outer peripheral surface of the root portion.

Further, the lower surface of the flange portion 8 is provided with the enlarged hole 9
The inclined surface 12 is inclined obliquely upward from the opening edge 11 with respect to the lower surface of the flange portion 8 toward the outer periphery of the flange portion 8 by an appropriate angle (θ).

In FIG. 1, reference numeral 13 is a lower support tool for elastically supporting the lower end portion of the radiator 1 with respect to the vehicle body frame 14.

In this way, the guide pin 3 protruding from the radiator 1
Is inserted into an elastic bush 6 attached to the bracket 4 of the vehicle body frame 2, so that the horizontal movement of the upper end portion of the radiator 1 is restricted to a small value under elastic support. be able to.

Further, the recoil of the radiator 1 is regulated by elastic deformation that compresses the flange portion 8 integrally formed with the bush 6 in the axial direction thereof.

Moreover, when the radiator 1 jumps up, the most protruding portion of the inclined surface 12 of the lower surface of the flange portion 8 of the bush 6, that is, the opening edge portion 1 of the enlarged hole 9.
1, the upper surface of the radiator 1 abuts, and the opening edge 11
The portion of is elastically deformed first, and this elastic deformation is an elastic deformation that gradually fills the gap 10 between the enlarged hole 9 and the guide pin 3. Therefore, the spring constant at the time of this elastic deformation is small at first. , The gap 10 gradually increases as the gap 10 is filled, and when the gap 10 is completely filled, the entire flange portion 8 is elastically deformed thereafter, so the spring constant is It will be even larger.

That is, the contact between the bush 6 and the upper surface of the radiator 1 is
By changing from linear contact to surface contact (the contact surface gradually increases), the spring constant in the direction in which the radiator jumps up is initially the smallest, and then increases in proportion to the upward displacement of the radiator. The amount of upward displacement can be restricted to a small value under the condition of elastic support.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a vertical sectional front view, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a view showing a disassembled state. 1 ... Radiator, 2 ... Body frame, 3 ... Guide pin, 4 ... Bracket, 5 ... Engaging hole, 6 ... Bushing, 7 ... Inner diameter hole, 8 ... Flange section, 9 ... Enlargement Hole,
10 ... gap, 11 ... opening edge, 12 ... inclined surface.

Claims (1)

[Scope of utility model registration request] 1. A guide pin projecting upward from the upper surface of a radiator is slidably inserted into an inner diameter hole of an elastic bush made of rubber or the like fitted in a vehicle body frame of an automobile.
On the outer periphery of the lower end of the bush, a large-diameter flange portion that comes into contact with the lower surface of the vehicle body frame is integrally formed, while a portion of the inner diameter hole of the bush on the lower surface side of the flange portion has an inner diameter of the portion. Is formed in a tapered enlarged hole that gradually expands toward the lower surface of the flange portion, and the lower surface of the flange portion extends from the opening edge portion of the enlarged hole with respect to the lower surface of the flange portion to the outer periphery of the flange portion. An upper support device for a radiator, characterized in that the upper support device has a slanted surface that is slanted upward and upward.