JPH0730320U - Support structure for radiator cooling fan - Google Patents

Abstract

(57) [Summary] [Purpose] To effectively prevent damage to fan blades without reducing the cooling effect. [Structure] The fan drive shaft 2 is fixed via a bearing 3, and a coil spring 14 and a rubber which are cushioning members are provided.
Connect to shaft coupling 4 consisting of 15.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a support structure for a radiator cooling fan applied to a construction machine such as a hydraulic excavator.

[0002]

[Prior art]

 In construction machines such as hydraulic excavators, work is performed by operating each cylinder by using a hydraulic pump and the like with an engine as a drive source. In order to keep the combustion temperature of the engine constant, a fan is installed immediately in front of the radiator, and the fan is rotated to cool the cooling water in the radiator.

A general structure of this radiator cooling is, for example, as shown in FIG. Fig. 4 shows the structure applied to the hydraulic excavator, 5 is an upper swing body, 6 is an engine, 7 is an engine mount, 8 is a radiator, 9 is a cowl, 1 is a fan, 2 is a fan drive shaft, respectively. Shows.

That is, the fan 1 is integrated with the engine 6 in the cowl 9 of the radiator 8 so that the rotational force of the engine 6 is transmitted to its drive shaft via the pulleys 10 and 11 and the belt 12. Will be placed. The engine 6 is fixed to an engine mount 7 arranged on the upper swing body 5.

[0005]

[Problems to be solved by the device]

 By the way, in construction machinery, the machine rocks and vibrates during a series of work and traveling. At that time, since the engine mount 7 is rubber, it is displaced in all degrees of freedom, and the engine 6 fixed on the engine mount 7 is the same. Will be displaced in all degrees of freedom.

On the other hand, since the fan 1 is also arranged integrally with the engine 6 as described above, when the engine 6 is displaced, it is also displaced accordingly.

However, since the fan 1 is arranged immediately before the radiator 8 and in the cowl 9, when the fan 1 is displaced, the blades come into contact with the radiator 8, the cowl 9 and its peripheral members, and the fan 1 is damaged. There was a problem of doing.

On the other hand, it is conceivable to increase the clearance between the fan 1 and the radiator 8 in consideration of the displacement, but if this is done, the amount of air flow will be reduced and the cooling effect will decrease. become.

The present invention has been made in view of the above problems of the prior art, and provides a radiator cooling fan support structure capable of effectively preventing damage to fan blades without reducing the cooling effect. Is what you are trying to do.

[0010]

[Means for Solving the Problems]

 Therefore, the basic structure of the radiator cooling fan support structure according to the present invention is that the fan drive shaft is fixed via a bearing and is connected to a shaft joint in which a buffer member is used. .

Here, examples of the cushioning member that is a constituent element of the shaft coupling include a spring and rubber.

[0012]

[Action]

 When the machine shakes or vibrates, the engine displacement is absorbed by the shock absorbing member of the shaft coupling. In addition, since the fan drive shaft is firmly fixed by bearings, only engine rotation is transmitted to the drive shaft, and transmission of engine displacement is effectively suppressed.

[0013]

【Example】

 A specific embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments.

FIG. 1 is a schematic view showing a mounting state of a fan in which the fan support structure of the present invention is used, FIG. 2 is a partial sectional view showing a main part of the support structure in FIG. 1, and FIG. 3 is A in FIG. FIG. 1 is a view from the direction of arrow A, in which 1 is a fan, 2 is a fan drive shaft, 3 is a bearing, 4 is a coupling, 6 is an engine, 7 is an engine mount, 8 is a radiator, and 9 is a cowl.

As shown in the figure, the fan 1, the engine 6, the radiator 8 are arranged and the structure in which the rotational force of the engine 6 is transmitted to the fan drive shaft 2 via the pulleys 10, 11 and the belt 12 is conventional. In the present embodiment, first, the stator 13 is attached to the cowl 9 of the radiator 8, the bearing 3 is attached to the center of the stay 13, and the fan drive shaft 2 is fixed by the bearing 3. . On the other hand, a coupling 4 is connected to the pulley 10 and the drive shaft 2 is connected to the coupling 4.

The coupling 4 is composed of a tubular portion having flanges at both ends, and a coil spring 14 which is externally inserted in the tubular portion and whose both ends are locked to the flange. A cylindrical rubber 15 is externally fitted to the flange so that both ends thereof are locked to the flange.

Since the present embodiment is configured as described above, when the machine body swings or vibrates, the engine displacement is absorbed by the coil spring 14 and the rubber 15 which are buffer members of the coupling 4. In addition, since the fan drive shaft 2 is firmly fixed by the bearing 3, only the engine rotation is transmitted to the drive shaft 2 and the transmission of the engine displacement is effectively suppressed. Therefore, the blades of the fan 1 do not come into contact with the radiator 8, the cowl 9 and the like even when the machine body swings or vibrates, and the damage can be prevented in advance. Also, since the possibility of contact has been eliminated, there is no need to take a large clearance between the fan and the radiator, and of course there is no problem of reduced air flow.

[0018]

As described above, according to the radiator cooling fan supporting structure of the present invention, since it is not necessary to make a large clearance between the fan and the radiator, the cooling effect is not reduced at all. Moreover, since the displacement of the fan can be prevented, damage to the blades can be effectively prevented.

[Brief description of drawings]

FIG. 1 is a schematic view showing a mounted state of a fan using a fan support structure of the present invention.

FIG. 2 is a partial cross-sectional view showing a main part of the support structure in FIG.

FIG. 3 is a view on arrow AA in FIG.

4A and 4B are views for explaining a portion to which a conventional radiator cooling fan is applied and a structure thereof, in which FIG. 4A is an overall view of an upper revolving structure, and FIG. is there.

[Explanation of symbols]

 1 fan 2 fan drive shaft 3 bearing 4 coupling 6 engine 8 radiator

Claims (1)

[Scope of utility model registration request] 1. A support structure for a radiator cooling fan, wherein a fan drive shaft is fixed via a bearing and is connected to a shaft joint in which a buffer member is used.