JP2006306116A - Industrial vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an industrial vehicle which can perform a sufficient heat dissipation, and can efficiently perform the cooling of the brake section. <P>SOLUTION: An axle 20 is provided on a car body 2 side, and the brake section 22 through which an axle shaft 24 is passed is provided on both ends in the vehicle width direction of an axle main body 21 in the axle, and a fin 23 for heat radiation is provided on the outer periphery of the brake section. A wheel 4 is provided on the external end section of the axle shaft through an end retarder 25. A blade body 26 for cooling which can feed air toward the fin for heat radiation is provided in a manner to be freely integrally rotatable with the wheel side. When this industrial vehicle is driven, the blade body for cooling which integrally rotates with the wheel side feeds air toward the fin for heat radiation by drawing in air in the surroundings. Thus, the fin for heat radiation can forcibly be cooled to perform a sufficient heat radiation, and the cooling for the brake section can be efficiently performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an industrial vehicle such as a wheel loader.

  Conventionally, the following configuration is provided as an axle in this type of industrial vehicle. That is, final & brakes are provided at both ends of the axle housing in the vehicle width direction, and heat radiating fins are provided on the outer periphery of the final & brake. An axle shaft is inserted into the final & brake, and a wheel hub is provided at the outer end of the axle shaft (see, for example, Patent Document 1).

According to this conventional configuration, the wheel is driven and rotated through the wheel hub by the rotation of the axle shaft, and the vehicle travels forward and backward, and can stop and stop by the braking action of the final & brake. At that time, the heat generated in the final & brake portion by the braking action is radiated through the heat radiation fins.
JP-A-8-150806 (page 2-3, FIG. 1)

  However, according to the above-described conventional configuration, heat is radiated only through the heat radiating fins provided in the non-rotating final & brake, so that it is difficult to expect sufficient heat radiation, and the final & brake cannot be cooled efficiently.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an industrial vehicle that can sufficiently dissipate heat and efficiently cool a brake part.

  In order to achieve the above-mentioned object, the industrial vehicle according to claim 1 of the present invention is provided with an axle on the vehicle body side, and axle shafts are inserted into both ends of the axle body of the axle in the vehicle width direction. The brake part is provided with a heat dissipating fin on the outer periphery of the brake part, and a wheel is provided on the outer end of the axle shaft via a final reduction gear, which can blow air toward the heat dissipating fin. A cooling blade body is provided so as to be rotatable integrally with the wheel side.

  Therefore, according to the first aspect of the invention, by rotating the axle shaft in the axle forward and backward, the wheels can be moved forward and backward through the final reduction gear, so that the industrial vehicle can travel forward and backward. During such forward and backward traveling, the industrial vehicle can be stopped by applying a brake in the brake portion. At this time, the brake part generates heat, the heat is conducted to the heat radiating fin, and is radiated from the heat radiating fin when the vehicle is stopped. In addition, when traveling on an industrial vehicle, the cooling blade that rotates integrally with the wheel side entrains the surrounding air and blows it toward the heat dissipation fins. Can be forcibly cooled.

The industrial vehicle according to claim 2 of the present invention is characterized in that, in the configuration according to claim 1 described above, the cooling blade is provided on a rim constituting the wheel.
Therefore, according to the invention of claim 2, the cooling blade can be easily disposed at a suitable position close to the heat dissipating fin.

  According to the first aspect of the present invention described above, by rotating the axle shaft in the axle forward and backward, the wheels can be rotated forward and backward via the final reduction gear so that the industrial vehicle can travel forward and backward. Industrial vehicles can be stopped by applying the brakes. At this time, the brake portion generates heat, and the heat is conducted to the heat radiating fins so that the heat can be radiated from the heat radiating fins while the vehicle is stopped. In addition, when traveling on an industrial vehicle, the cooling blade that rotates integrally with the wheel side entrains the surrounding air and blows it toward the heat dissipation fins. Can be forcibly cooled to sufficiently dissipate heat, and the brake portion can be efficiently cooled.

  According to the second aspect of the present invention, the cooling blade can be easily disposed at a suitable position close to the heat dissipating fin.

[Embodiment 1]
Hereinafter, Embodiment 1 of the present invention will be described based on FIGS. 1 to 3 as a state adopted in a wheel loader.

  In FIG. 1, a wheel loader (construction vehicle) 1 which is an example of an industrial vehicle has a vehicle body 2 provided with a front vehicle body portion 2A provided with a pair of left and right front wheels 3 and a pair of left and right rear wheels 4. And rear vehicle body 2B. The two vehicle body portions 2A and 2B are connected to each other by a vertically connecting shaft 5 that is vertically distributed, and a pair of left and right steering cylinders 6 are disposed between the two vehicle body portions 2A and 2B. . A driving unit 10 in which a seat, a boom operation lever 7, a bucket operation lever 8, an accelerator pedal, a brake pedal 9 and the like are disposed is provided at the upper front end of the rear vehicle body 2B.

  A pair of left and right booms 11 are disposed in front of the operation unit 10 so as to be able to swing up and down, and a pair of left and right boom cylinders 12 that swing the boom 11 up and down are provided. Between the free ends of the booms 11, a bucket device 13 is rotatably attached, and a link mechanism 14 is provided in which the free ends are connected to the bucket device 13 so as to be relatively rotatable. A bucket cylinder 15 is provided between the base end of the link mechanism 14 and the front vehicle body 2 </ b> A to rotate the bucket device 13 via the link mechanism 14 by its expansion and contraction. An engine 16 is mounted on the upper portion of the rear vehicle body 2B.

  A rear axle (axle) 20 is provided on the vehicle body 2 side, and the rear wheel 4 is provided via the rear axle 20 so as to be driven to rotate. That is, in FIGS. 2 and 3, the rear axle 20 has an axle body 21 attached to the rear vehicle body portion (vehicle body) 2B side, and brake portions 22 are provided at both ends in the vehicle width direction of the axle body 21. A group of heat dissipation fins 23 is provided on the outer periphery of the brake portion 22. An axle shaft 24 is inserted into the brake portion 22, and the rear wheel (wheel) 4 is provided at an outer end portion of the axle shaft 24 via a final reduction gear 25.

  Here, the rear wheel 4 is configured by a rim 4A attached to the rotating portion 25a side of the final reduction gear 25, a tire 4B attached to the rim 4A, and the like. The rim 4A is provided with a cooling blade 26 capable of blowing air toward the heat-dissipating fins 23 by welding or the like. That is, the cooling blades 26 are plate-shaped, and are provided at a plurality of locations (for example, eight locations) in the circumferential direction on the inner peripheral surface of the rim 4A. It is configured to be integrally rotatable around the axis 4C.

  At this time, the cooling blade body 26 group has an outer peripheral side toward the forward rotation a side with respect to the wheel shaft center 4C so that air can be blown W toward the heat radiating fins 23 during forward rotation (forward rotation) a. It is inclined so as to be positioned, and is inclined so that the tip side is positioned on the forward rotation a side in the direction of the wheel axis 4C. Further, the cooling blade 26 can be easily disposed at a suitable position close to the heat dissipating fins 23 by being provided on the rim 4A.

Hereinafter, the operation in the first embodiment will be described.
By rotating the axle shaft 24 in the rear axle 20 in the forward direction, the rear wheel 4 can be rotated forward a through the final reduction gear 25, and thus the wheel loader 1 can travel forward A. Further, by reversely rotating the axle shaft 24, the rear wheel 4 can be rotated backward b through the final reduction gear 25, and thus the wheel loader 1 can travel backward B. In such forward and backward traveling A and B, the intended operation can be performed by operating the bucket device 13 by operating the levers 7 and 8 as appropriate.

  During forward and backward travel A and B, the brake pedal 9 is stepped on, so that the brake is applied via the brake portion 22 and the wheel loader 1 can be stopped. At this time, the brake portion 22 generates heat, and the heat is conducted to the heat radiating fins 23 and is radiated from the heat radiating fins 23 when the vehicle is stopped.

  In addition, when the wheel loader 1 is traveling forward A, the cooling blades 26 which are rotating forward a around the wheel axis 4C integrally with the rear wheel 4 entrain the surrounding air and The air W is blown toward the fins 23, thereby forcibly cooling the heat dissipating fins 23, so that sufficient heat radiation can be performed and the brake portion 22 can be efficiently cooled.

Next, a second embodiment of the present invention will be described with reference to FIG.
The second embodiment is a form in which the brake portion 22 protrudes inward from the width of the rear wheel 4, and the cooling blade 30 is provided at a plurality of circumferential positions on one side of the ring plate-shaped bracket 31 ( For example, 8 places). The cooling blade 30 group is attached by a fixture (bolt, nut, etc.) 32 with the other side of the bracket 31 fitted on the axle shaft 24 or the like being brought into contact with the rotating portion 25a of the final reduction gear 25. It is located in a state where a predetermined gap is placed outside the heat dissipating fins 23. Thus, the cooling blade body 30 group is configured to be rotatable integrally with the rotating portion 25a and the rear wheel 4 around the wheel axis 4C.

  Further, at both end portions of the axle main body 21, cover bodies 33 positioned outside the cooling blade body 30 are provided. That is, the cover body 33 includes a half cylindrical portion 34 and a half disc portion 35 that covers one side surface of the half cylindrical portion 34, and the inner edge portion of the half disc portion 35 is the brake portion 22. By being attached by a fixture (bolt, nut, etc.) 36 in contact with the inner side surface, the half cylindrical portion 34 is in a state where a predetermined gap is placed outside the cooling blade body 30 group. Be positioned. At that time, the half cylindrical portion 34 is opposed to the upper half of the brake portion 22.

Hereinafter, the operation of the second embodiment will be described.
When the wheel loader 1 is traveling forward A, the cooling blade body 30 group that rotates forward a around the wheel axis 4C integrally with the rotating portion 25a entrains surrounding air into the heat radiation fin 23. As a result, the heat dissipating fins 23 are forcibly cooled, so that sufficient heat dissipation can be performed and the brake portion 22 can be efficiently cooled. Also, when the forward running A or the like, the splashed mud or the like is about to fall toward the cooling blade body 30 group or the heat dissipating fins 23, the mud or the like is received by the cover body 33. It is possible to avoid dropping the cooling blades 30 and the heat dissipating fins 23.

  In the first embodiment described above, the eight cooling blade bodies 26 are inclined so that the outer peripheral side is positioned on the forward rotation a side with respect to the wheel axis 4C, and the front end side advances in the direction of the wheel axis 4C. Although it is configured to be inclined so as to be positioned on the rotation a side, air can be blown W toward the heat radiation fin 23 during forward rotation a, but the number of cooling blades 26 is The angle, direction, shape, etc. are arbitrarily set.

  In the first embodiment described above, the wheel loader 1 has more forward travel A than reverse travel B, and the forward travel A has a higher speed. The form in which the body 26 group entrains the surrounding air and blows air toward the heat dissipating fins 23 is shown. This is because each cooling blade body 26 is formed in a V shape so that it can be cooled even during reverse travel. The blade body group may be of a type that entrains surrounding air and blows air toward the heat dissipating fins 23.

  In the first and second embodiments described above, a type in which the cooling blades 26 and 30 groups are provided corresponding to the rear wheel 4, that is, the rear axle 20, is shown. When employed, the cooling blade group may be provided on the front wheel 3 side, or the cooling blade group may be provided on both wheels 3 and 4 side.

In the form of the first embodiment described above, the cover body that acts as in the second embodiment may be a form provided on the axle body 21 side as a suitable shape.
In the first embodiment described above, the wheel loader 1 is shown as an industrial vehicle, but this may be another construction vehicle, a transport vehicle such as a forklift or a container transport vehicle, and the like.

1 is a side view of an industrial vehicle according to a first embodiment of the present invention. FIG. It is a partially cutaway rear view of the rear axle part in the industrial vehicle. It is a partially cutaway side view of the rear axle part in the industrial vehicle. FIG. 6 is a partially cutaway rear view of a rear axle portion in an industrial vehicle, showing Embodiment 2 of the present invention.

Explanation of symbols

1 Wheel loader (industrial vehicle)
2 Car body 3 Front wheel 4 Rear wheel (wheel)
4A Rim 4B Tire 4C Wheel axis 10 Driving part 11 Boom 13 Bucket device 20 Rear axle (axle)
21 Axle body 22 Brake part 23 Heat radiation fin 24 Axle shaft 25 Final reduction gear 25a Rotating part 26 Cooling blade body 30 Cooling blade body 31 Bracket 33 Cover body A Forward travel B Reverse travel a Forward rotation b Reverse rotation W Blow

Claims (2)

  An axle is provided on the vehicle body side, and at both ends of the axle body of the axle in the vehicle width direction, a brake portion through which the axle shaft is inserted is provided, and a heat radiation fin is provided on the outer periphery of the brake portion. A wheel is provided on the outer end portion of the axle shaft via a final reduction gear, and a cooling blade body capable of blowing air toward the heat radiating fin is provided to be rotatable integrally with the wheel side. Industrial vehicle.   2. The industrial vehicle according to claim 1, wherein the cooling blade is provided on a rim constituting the wheel.

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