JPH0648103Y2 - Radiator upper support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention elastically supports a radiator for an internal combustion engine mounted on an automobile with respect to a vehicle body frame in the automobile, and an upper portion of the radiator is attached to the vehicle body frame. The present invention relates to improvement of an upper supporting device for supporting.

[Conventional technology]

Recently, a radiator for an internal combustion engine mounted on an automobile is elastically supported by a vehicle body frame of the automobile to form a vibration system, and vibration of the radiator is used to damp the vibration of the automobile body, that is, The vehicle body vibration is damped by the dynamic damper effect of the radiator.

Then, in this elastic support device of the radiator, the upper support device for supporting the upper part of the radiator with respect to the vehicle body frame is straight from the upper surface of the radiator as disclosed in Japanese Utility Model Laid-Open No. 61-190721. By vertically projecting the guide pin of the above and inserting the guide pin in a vertically slidable manner into a bush made of an elastic material such as rubber attached to the upper member of the vehicle body frame, vertical vibration of the radiator is allowed. Is configured.

In this case, in order to improve the dynamic damper effect of the radiator, it is necessary for the radiator to freely vibrate, and therefore, conventionally, the inner diameter of the hole in the bush is formed larger than the outer diameter of the guide pin. That is, by forming a gap between the inner peripheral surface of the bush and the outer peripheral surface of the guide pin to reduce the contact area between the inner peripheral surface of the bush and the guide pin, the frictional resistance to the guide pin is reduced. I was trying.

[Problems to be solved by the device]

However, the radiator sways not only in the vertical direction but also in the horizontal direction, and since the guide pin often moves up and down with its axis tilted, the guide pin is simply moved between the inner peripheral surface of the bush and the outer peripheral surface of the guide pin. In a configuration where only a gap is provided between the radiators, if the gap is small, when the radiator vibrates in a tilted state, the guide pins twist and frictional resistance increases, so that the radiator does not vibrate freely. It was hindered and the dynamic damper effect became insufficient.

On the contrary, if the gap between the inner peripheral surface of the bush and the outer peripheral surface of the guide pin is increased, the horizontal deflection of the upper part of the radiator becomes larger, and the radiator is tilted with respect to the guide pin every time it tilts. Since a large moment is applied, the guide pin is easily broken, and in order to avoid this, the diameter of the guide pin needs to be increased. The bushes became larger, which in turn increased the weight of the support device.

Further, in a conventional guide pin formed in a straight shape, it is difficult to insert the guide pin into the bush, so that there is a problem in that the efficiency of the radiator assembling work is poor.

The present invention aims to solve these problems.

[Means for Solving the Problems]

To achieve this object, the present invention supports the lower part of a radiator to a lower member of a vehicle body frame of an automobile through a lower elastic body, while providing a guide pin protruding upward from the upper surface of the radiator to a vehicle body of the automobile. In a radiator supporting device which is slidably inserted into a hole of an elastic bush attached to an upper member of a frame, the guide pin is formed in a tapered shape whose outer diameter is reduced upward. On the other hand, the hole in the bush is formed in a tapered shape such that the annular gap between the inner peripheral surface of the hole and the outer peripheral surface of the guide pin is narrow at the upper end of the guide pin and wide at the root of the guide pin. It was configured to do.

[Function and effect of device]

According to this structure, the guide pin is in contact with a portion of the inner peripheral surface of the bush where the gap between the inner peripheral surface and the outer peripheral surface of the guide pin is the smallest, in the hole of the bush. Can be tilted and slid vertically,
Even if the radiator vibrates in a tilted position,
The guide pin is not twisted.

Moreover, the hole in the bush is tapered so that the annular gap between the inner peripheral surface of the hole and the outer peripheral surface of the guide pin is narrow at the upper end of the guide pin and wide at the root of the guide pin. By doing
In the annular gap between the inner peripheral surface of the hole in the bush and the outer peripheral surface of the guide pin, it is possible to prevent dust and the like from entering and clogging, so that the guide pin is not twisted, It is possible to reduce the frictional resistance to the guide pin and freely vibrate the radiator.

Also, the impact due to the tilting of the radiator acts as a moment on the base end portion of the guide pin, but by forming the guide pin in a tapered shape whose outer diameter decreases upward, the guide pin is The guide pin and the bush to be fitted to the guide pin are not necessary because it is possible to prevent breakage due to the tilting of the radiator by only making the diameter of the part to withstand the impact of tilting of the radiator, and it is not necessary to form the entire guide pin with a large diameter. Can be prevented from becoming larger than necessary, and moreover, since the guide pin is tapered, it can be inserted into the bush very easily.

Therefore, according to the present invention, the guide pin and the bush can be prevented from becoming unnecessarily large while preventing the guide pin from being twisted and clogging with dust and the like to freely vibrate the radiator. Therefore, the vibration of the vehicle body can be reliably damped without increasing the weight of the supporting device, and moreover, since the work of inserting the guide pin into the bush can be easily performed, the efficiency of the radiator assembling work can be improved. Have an effect.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings (FIGS. 1 to 4). In the drawings, reference numeral 1 is a radiator provided with a lower tank 1a and an upper tank 1b, and reference numeral 2 is a lower member of a vehicle body frame of an automobile. Reference numeral 3 denotes an upper member of a vehicle body frame of an automobile, and the lower surface of the lower tank 1a of the radiator 1 is elastically supported by an elastic lower elastic body 4 attached to a lower member 2 of the vehicle body frame. On the other hand, on the upper surface of the radiator 1, a guide pin 5 formed in a tapered shape with an appropriate angle (θ1) so as to reduce the outer diameter upward is provided in a protruding manner.

Then, an engaging hole 7 is formed in the bracket 6 attached to the upper member 3 of the vehicle body frame, and a bush 8 formed of an elastic body such as rubber is fitted into the engaging hole 7 and The guide pin 5 is vertically slidably inserted into the hole 8a of the bush 8.

At this time, the hole 8a in the bush 8 is formed into a tapered surface that expands downward at an angle (θ3) larger than the taper angle (θ1) of the guide pin 5 by an angle (θ2), and the hole 8a in the bush 8 is formed. Inner peripheral surface and guide pin 5
The guide pin 5 is formed in a tapered shape such that the annular gap between the guide pin 5 and the guide pin 5 is narrow at the upper end of the guide pin 5 and wide at the root of the guide pin 5, so that the guide pin 5 has a constant angle (θ3) (radiator). The tilting angle is larger than the maximum tilting angle of 1).

The inner diameter (D1) of the upper end of the hole 8a in the bush 8 is
The guide pin 5 is formed to have a diameter slightly larger than the outer diameter (d1) of the upper end of the guide pin 5 so that the guide pin 5 can slide vertically.

With this structure, as shown in FIG. 4, even when the radiator 1 is inclined, the guide pin 5 can be tilted and vertically slidable while being in contact with the upper end edge 8b of the hole in the bush 8. Therefore, even if the radiator 1 is inclined, the guide pin 5 is not twisted.

Moreover, the hole 8a in the bush 8 is such that the annular gap between the inner peripheral surface of the hole 8a and the outer peripheral surface of the guide pin 5 is narrow at the upper end of the guide pin 5 and wide at the root of the guide pin 5. By thus forming the taper shape, it is possible to prevent dust or the like from entering the annular gap between the inner peripheral surface of the hole 8a and the outer peripheral surface of the guide pin 5 in the bush 8, and thus, as described above. In combination with the fact that the guide pin 5 is not twisted, the frictional resistance to the guide pin 5 is reduced, the radiator 1 is freely vibrated, and the dynamic damper effect of the radiator 1 is sufficiently exerted. Can be done.

Also, the impact caused by the tilting of the radiator 1 is not affected by the guide pin 5
Acts as a moment on the base end of the guide pin 5
Since the upper end is tapered, only the base end portion of the guide pin 5 needs to have a diameter dimension that can withstand the impact due to the tilting of the radiator 1, and it is not necessary to form the entire guide pin 5 with a large diameter. Since it does not exist, it is possible to prevent the guide pin 5 and the bush 8 from becoming larger than necessary.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is an enlarged view of an essential part of FIG. 1, and FIG. 1 ... Radiator, 1a ... Lower tank, 1b ... Upper tank, 2 ... Body frame lower member, 3 ... Body frame upper member, 4 ... Lower elastic body, 5 ... Guide pin, 8 ... Bush , 8a ... Hole in the bush.

Claims (1)

[Scope of utility model registration request] 1. A lower part of a radiator is supported by a lower member of a vehicle body frame of an automobile through a lower elastic body, and a guide pin protruding upward from an upper surface of the radiator is used as an upper member of a vehicle body frame of the automobile. In a radiator supporting device which is vertically slidably inserted into a hole of an attached elastic bush, while the guide pin is formed in a tapered shape whose outer diameter decreases upward, The hole is tapered so that an annular gap between the inner peripheral surface of the hole and the outer peripheral surface of the guide pin is narrow at the upper end of the guide pin and wide at the root of the guide pin. Radiator upper support device.