JP3452473B2 - Axle arrangement structure for industrial vehicles - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle arrangement structure for an industrial vehicle such as a construction vehicle having a bucket device mounted on a front portion thereof. 2. Description of the Related Art Conventionally, as this type of axle arrangement structure, for example, as shown in FIG.
Reference numeral 60 denotes a pair of left and right side frame portions 61 and a frame strength member 62 provided between the side frame portions 61. A plurality of bolt insertion holes 63 are provided at the free ends of the side frame portions 61, respectively. Was. The axle 64
The center axle 65 and the left and right side axles 66 were formed as an integrated component. The side axle 66 was provided with a bolt insertion hole 67 that could freely match the bolt insertion hole 63. In such a conventional configuration, in order to fix the axle 64 to the vehicle body 60, a bolt insertion hole 63 provided on the vehicle body 60 and a bolt insertion hole 67 provided on the axle 64 are aligned with each other. After that, the bolt 38 is inserted from the bolt insertion hole 63 to the bolt insertion hole 67, and then the nut 38 is tightened and fixed. [0004] However, according to the above-described conventional configuration, the vehicle body 60 has the frame strength member 62, so that the vehicle body structure is complicated and large, and the whole is expensive. Accordingly, an object of the present invention is to provide an axle arrangement structure for an industrial vehicle that can omit a frame strength member and can easily carry the same before assembly. [0006] In order to achieve the above-mentioned object, an axle arrangement structure for an industrial vehicle according to the present invention comprises a central axle portion and two axle portions on both sides of the central axle portion. It consists of a side axle part connected via a connecting tool, and a pair of left and right side frame parts constituting the vehicle body are interposed between the central axle part and the side axle part, and are integrated when connected by the connecting tool. It is characterized by that. Therefore, according to the present invention, the side frame portion is sandwiched and integrated between the central axle portion and the side axle portion when the connecting member connects the central axle portion and the side axle portion. Since the central axle portion is located at the center and serves as a strength member, sufficient strength can be ensured while omitting the frame strength members between the side frame portions. Also, the axle can be removed
Separated (disassembled) into a central axle and a pair of side axles
I can do it. An embodiment of the present invention will be described below with reference to FIGS. A vehicle body 2 of an electrically driven construction vehicle 1 as an example of an industrial vehicle includes a front body portion 2A provided with a pair of left and right front wheels 3 and a rear body portion 2B provided with a pair of left and right rear wheels 4. Become. Both body parts 2A, 2B
The space therebetween is connected by a vertically connecting shaft 5 which is divided vertically so as to be relatively rotatable, and a pair of left and right steering cylinders 6 is disposed between the two vehicle body parts 2A, 2B. [0009] An operating section 7 in which seats, various levers, and the like are arranged is provided above the front end of the rear body section 2B. A pair of right and left booms 8 are disposed in front of the driving unit 7.
The base ends of these booms 8 are attached to brackets 9 provided at the upper rear end of the front vehicle body 2A via support shafts 10 in the left-right direction, so that they can swing up and down. A cargo handling cylinder 11 for vertically swinging the boom 8 is provided between the front vehicle body 2A and the boom 8. A bucket device (working device) 13 is mounted between the free ends of both booms 8 via horizontal pins 12 in the left-right direction. A second link 16 is connected to a free end of a first link 15 attached to the boom 8 via a pin 14 by a pin 17, and the free end of the second link 16 is connected to the bucket device 13 by a pin 18. Have been. Between the base end of the first link 15 and the boom 8, a bucket cylinder 19 for rotating the bucket device 13 around the horizontal pin 12 is provided. The front wheels 3 are attached to the front vehicle body 2A via the front axle 20, and the rear wheels 4 are attached to the rear vehicle body 2B via the rear axle 29. The front axle 20 (the same applies to the rear axle 29) has a central axle portion 21.
And a pair of left and right side axle portions 22. A plurality of screw holes 23 are respectively formed on both side surfaces of the central axle portion 21, and a group of bolt insertion holes 24 which can be matched with the group of screw holes 23 is provided in each axle portion 22. Therefore, the side axle portion 22 is applied to the side of the central axle portion 21, the screw holes 23 are matched with the bolt insertion holes 24, and the bolts (the bolts) inserted into the bolt insertion holes 24 from the outside are used. The front axle 20 can be configured by connecting the pair of left and right side axles 22 to the center axle 21 by screwing the connection tool 25) into the screw hole 23. The front body portion 2A is a pair of left and right side frame portions 2.
The side frame 26 has a through hole 2 corresponding to an opening of the central axle 21 or the side axle 22.
7 are formed, and a bolt insertion hole 28 is formed around the through hole 27 so as to be able to match with the screw hole group 23 and the bolt insertion hole 24 group. Accordingly, when the front axle 20 is constructed, the side frame portion 26 is interposed between the central axle portion 21 and the side axle portion 22, and the screw holes 23, the bolt insertion holes 28, and the bolt insertion holes are provided. When the bolts 25 are inserted from the bolt insertion holes 24 into the bolt insertion holes 28 from the outside in a state where the bolts 25 are matched with each other, and the bolts 25 are screwed into the screw holes 23, the bolt 2
When the center axle portion 21 and the side axle portion 22 are connected by the fifth group, the side frame portion 26 is also integrated. A hydraulic pump 30 is provided on the front body part 2A, and a blower 31 and a generator 3 are provided on the rear body part 2B.
2, generator 33, engine 34, radiator 35
Are arranged in this order from front to back. Further, a propeller shaft 36 is disposed between the front vehicle body portion 2A and the rear vehicle body portion 2B. Axle section (axle shaft section) 2 on each side
2 is provided with an electric drive device 40 for forcibly driving the front wheels 3 and the rear wheels 4. That is, the side axle part 2
An electric motor (electric motor) 41 is provided inside 2, and the electric motor 41 has an outer end portion supported by a ring body 42 provided continuously from the inner surface of the side axle portion 22. Further, an emergency steering pump 43 is attached to the electric motor 41 so as to be located in the central axle portion 21. At the outer end of the side axle portion 22, a fixed cylindrical body 44 is arranged in an extended state.
It is connected to the side axle part 22 via a ring-plate-shaped mounting plate (partition part) 45 integrated at its inner end.
A rotary cylinder 47 is externally fitted to the fixed cylinder 44 via a bearing device 46, and a circular plate 48 also serving as a lid plate is connected to an outer end of the rotary cylinder 47. The rotary cylinder 47 and the circular plate 48 are located in the wheel 37,
And it is connected to the wheel 37. A drive shaft 49 protruding outward from the electric motor 41 and positioned in the fixed cylinder 44 is disposed via a speed reducer 50 with a brake device disposed in the fixed cylinder 44 (in the wheel 37). It is linked with the rotating cylinder 47. That is, the drive shaft 49 is connected to the first-stage reduction unit 51 and the second-stage reduction unit 52.
And the rotary cylinder 47 via a circular plate 48 and the like. The mounting plate 4 is a part of the pre-stage deceleration unit 51 and
A brake device 53 is incorporated near 5. The operation of the above embodiment will be described below. By driving the generator 32 by driving the engine 34, electric power can be generated, and the electric power is
To the electric motor 41 to drive the electric motor 41. By controlling the current to the electric motor 41 by operating the lever in the driving unit 7 and controlling the rotation of the electric motor 41 (forward rotation, reverse rotation, stop), the rotation of the drive shaft 49 is controlled by the front reduction unit 51 and the rear reduction unit. The power is transmitted to the rotary cylinder 47 via the reduction unit 52, the circular plate 48, and the like, whereby the wheels 3 and 4 can be forcibly driven in the forward or reverse direction via the wheel 37. Or you can run later. By operating the brake device 53, the construction vehicle 1 can be stopped. By driving the engine 34, the hydraulic pump 30 and the blower 31 are also operated.
Of the bucket device 13 via the boom 8 or the like
Can be activated. In such a construction vehicle 1, when the side frame portion 26 is connected to the central axle portion 21 and the side axle portion 22 by the bolts 25, these axle portions 21,
Since the central axle portion 21 is located between the side frame portions 26 and serves as a strength member by being sandwiched and integrated between the side frame portions 26, the frame strength member between the side frame portions 26 is omitted. While ensuring sufficient strength,
As a result, the vehicle body structure can be simplified and made compact, and the overall cost can be reduced. The front axle 20 has a bolt 25
The group can be separated (disassembled) into a central axle portion 21 and a pair of side axle portions 22 by a separating operation, that is, the side axle portion 22 and the electric drive device 40 in FIG.
Since the set portion A can be separated, transportation before assembly can be easily performed in view of its size (eg, vehicle width) and weight. In the above embodiment, the pair of front wheels 3
And a pair of rear wheels 4 are all provided with the electric drive unit 40. This is a type in which the pair of front wheels 3 is provided with the electric drive unit 40 only, and a pair of rear wheels. For example, the type in which the electric drive device 40 is provided only in the fourth drive unit 4 may be used. In the above embodiment, the vehicle body 2 is
Although a divided form composed of a front body part 2A and a rear body part 2B is shown, this may be an integrated body. In the embodiment described above, the bucket device 1 is used as the working device.
An industrial vehicle equipped with 3 is shown, which
The work vehicle may be an industrial vehicle equipped with a clamp device, a lift device, and the like. Hereinafter, another embodiment of the present invention will be described with reference to FIG. While the above-described embodiment is of an electric drive type in which the electric drive device 40 is incorporated in the side axle portion 22, in this alternative embodiment, a differential mechanism or the like is provided in the central axle portion. Format. That is, the front axle 20A has a central axle portion 21A and a pair of left and right side axle portions 22A.
Consists of A plurality of screw holes 23A are formed on both sides of the central axle portion 21A, respectively.
2A is provided with a group of bolt insertion holes 24A that can freely match the group of screw holes 23A. Therefore, the side axle portion 22A is applied to the side of the central axle portion 21A, the screw hole 23A group is matched with the bolt insertion hole 24A group, and the bolt (FIG. Example of connecting tool) 2
By screwing the 5A into the screw hole 23A, the pair of left and right side axles 22A is connected to the central axle 21A, and the front axle 20A can be configured. A pair of left and right side frame portions 26 are formed with through holes 27 corresponding to the open portions of the central axle portion 21A and the side axle portion 22A. A bolt insertion hole 28 is formed which can freely fit in the group of bolt insertion holes 24A. Therefore, with the side frame portion 26 interposed between the central axle portion 21A and the side axle portion 22A, the screw holes 23A, the bolt insertion holes 28, and the bolt insertion holes 24A are aligned. , Bolt insertion hole 24A
Bolt 25A inserted from group to bolt insertion hole 28 group
Is screwed into the group of screw holes 23A so that the bolt 25
Central axle 21A and side axle 22A by group A
At the time of connection, the side frame portion 26 can be integrated. According to this alternative embodiment, the side frame portion 26 is provided with a central axle portion 21A by a group of bolts 25A.
When the axle 21A is connected to the side axle 22A, the axle 21A is sandwiched between the axles 21A and 22A to be integrated.
Since A is positioned and serves as a strength member, sufficient strength can be ensured while omitting the frame strength members between the side frame portions 26, and the vehicle body structure can be simplified and made compact, and the whole can be manufactured at low cost. Can be The front axle 20A is provided with a bolt 2
By separating (disassembling) the central axle portion 21A and the pair of side axle portions 22A by the detaching operation of the 5A group, it is easy to transport before assembly in view of its size (vehicle width, etc.) and weight. I can do it. According to the present invention described above, the side frame portion is sandwiched and integrated between these axle portions when the center axle portion and the side axle portion are connected by the connecting tool. In other words, the central axle part is located between the side frame parts and serves as a strength member, so that sufficient strength can be secured while omitting the frame strength member between the side frame parts, thereby simplifying the body structure In addition to being compact, the overall cost can be reduced. The axle also
By separating (disassembling) the central axle part and the pair of side axle parts by disengagement of the connecting tool, transportation before assembly can be easily performed in view of its size (vehicle width, etc.) and weight. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an example of an embodiment of the present invention and is a partially cutaway front view of an axle arrangement structure of an industrial vehicle. FIG. 2 is a side view of the industrial vehicle. FIG. 3 is a plan view of the industrial vehicle. FIG. 4 is a side view of a body part of the industrial vehicle. FIG. 5 shows another embodiment of the present invention, and is a perspective view of an axle arrangement structure of an industrial vehicle in a partially separated state. FIG. 6 is a perspective view showing a conventional example, in which an axle arrangement structure of an industrial vehicle is partially separated. [Description of Signs] 1 Construction vehicle (industrial vehicle) 2 Body 2A Front body 2B Rear body 5 Vertical connecting shaft 6 Steering cylinder 7 Operating part 8 Boom 11 Loading cylinder 13 Bucket device (working device) 19 Bucket cylinder 20 Front Axle 21 Central axle part 22 Side axle part 25 Bolt (connector) 20A Front axle 21A Central axle part 22A Side axle part 25A Bolt (connector) 26 Side frame part 29 Rear axle 40 Electric drive unit 42 Electric motor (Electric motor) 44 Fixed Cylinder 47 Rotating cylinder 49 Drive shaft 50 Reducer with brake

Claims (1)

(57) [Claims 1] The axle comprises a central axle portion and side axle portions connected to both sides of the central axle portion via connecting tools. An axle arrangement structure for an industrial vehicle, wherein a pair of side frame portions are interposed between a central axle portion and a side axle portion and are integrated when connected by a connecting tool.