JP2000142149A - Industrial vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an industrial vehicle capable of shortening a shaft for interlocking an axle with a running drive device in the car longitudinal direction and involving a greatly reduced change in the shaft length when the wheel device is in vertical swinging, i.e., a cargo bed is elevating or sinking. SOLUTION: A wheel device 10 is composed of arms 13 and 14 attached to a car body 2 in such a way as capable of swinging in the vertical direction, in axle 15 mounted on the arms 13 and 14, a wheel 16 installed on the axle 15, and a vertical swing device 17 interlocking with the arms 13 and 14. On the side with arms 13 and 14, a miter gear device 20 is provided having an input shaft stretching across the car width and an output shaft in the car longitudinal direction. The input shaft is interlocked with a side with a running drive device 25 while the output shaft is interlocked with the axle 15 through a shaft having a short size in the car longitudinal direction and involving less change in the length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial vehicle having a vertically movable wheel device such as a large traveling vehicle.

[0002]

2. Description of the Related Art Conventionally, as this type of industrial vehicle, for example, a configuration shown in FIG. 7 is provided. That is,
Operating portions 42 and 43 are provided at both front and rear end portions of the vehicle body 41, respectively, and a loading platform 44 is provided at an upper portion of the vehicle body 41 so as to cover the upper portions of the both operating portions 42 and 43. Wheel devices 45 at a plurality of front and rear
55 are provided. Two wheel devices 4 in the center
5 is an arm 46 provided to be vertically swingable with respect to the main body 41 side, and an axle 47 provided on the arm 46.
And a wheel 48 provided on the axle 47, and a vertical rocking cylinder device 49 interlocked with the arm 46.
It is composed of And the axle 47,
The traveling drive device 5 disposed near the driving units 42 and 43
On the 0, 51 side, propeller shafts 52, 53 in the vehicle length direction
Are interlocked through.

[0003]

However, according to the above-mentioned conventional structure, the propeller shafts 52, 53 are connected to the traveling drive units 50, 51 near the driving units 42, 43 and the axle 47 of the wheel unit 45 at the center. It becomes longer in the vehicle length direction by interlocking with the
, That is, when the loading platform 44 is moved up and down, the length is greatly changed.

[0004] Further, since all of the wheel units 45 and 55 are disposed between the front and rear traveling drive units 50 and 51, the distance L between the second wheel unit 55 from the front and the forefront of the vehicle becomes longer. For example, the lower part of the driving units 42 and 43 may be rubbed when approaching a sloping road. A portion corresponding to the distance L of the loading platform 44 is a region where it is difficult to apply the eccentric load of the transported object, so that the allowable eccentric load region is reduced. Further, since the traveling driving devices 50 and 51 are arranged back to back with respect to the driving units 42 and 43, heat, vibration, noise, and the like of the traveling driving devices 50 and 51 are easily transmitted to the driving units 42 and 43. Become something.

Therefore, according to the first aspect of the present invention, the shaft for interlocking the axle and the traveling drive device can be shortened in the vehicle length direction, and at the same time, the vertical swing of the wheel device, that is, the lifting and lowering of the loading platform, It is an object of the present invention to provide an industrial vehicle capable of greatly reducing the amount of change in the shaft length in the above.

According to the second aspect of the present invention, an industrial vehicle in which the angle at which a hill can be climbed can be increased, the allowable eccentric load region can be expanded, and heat, vibration, noise, and the like on the traveling drive unit are hardly transmitted to the driving unit. The purpose is to provide.

[0007]

In order to achieve the above-mentioned object, an industrial vehicle according to a first aspect of the present invention is provided with a driving unit and a carrier on a vehicle body, and at a lower side of the vehicle body. An industrial vehicle in which wheel devices are provided at a plurality of front and rear positions, at least one of the wheel devices in the wheel device group is provided with an arm provided to be vertically swingable with respect to the vehicle body, and an arm provided on the arm. An axle, wheels provided on the axle, and a vertical rocking device interlocked with the arm. On the arm side, the input shaft is in the vehicle width direction and the output shaft is in the vehicle length direction. And an input shaft is interlocked with the traveling drive device, and an output shaft is interlocked with the axle via a shaft in the vehicle length direction.

Therefore, according to the first aspect of the present invention, the industrial vehicle can travel forward or backward by driving in the driving section. At that time, on the wheel device side provided with the miter gear device, either forward or reverse rotation of the traveling drive device is transmitted to the input shaft of the miter gear device, and then taken out to the output shaft of the miter gear device, and then the shaft is removed. Through the axle. Then, by operating the vertical rocking device to rotate the arm upward and raising the wheels via the axle, the loading platform can be lowered, and the vertical rocking device is reversely operated to move the arm downward. By pivoting and lowering the wheels through the axle, the carrier can be raised.

[0009] An industrial vehicle according to a second aspect of the present invention includes:
In the configuration according to the above-mentioned claim 1, an operating portion is provided at each of the front and rear ends of the vehicle body, and a loading platform is provided at an upper portion of the vehicle body in a state of covering both upper and lower operating portions. The wheel device is of a drive type provided with a miter gear device, and is driven by the vehicle body between the two wheel devices and the wheel device adjacent to both wheel devices and not provided with the miter gear device. The apparatus is characterized by being provided.

Therefore, according to the second aspect of the present invention, the traveling drive device is disposed adjacent to the wheel device provided with the miter gear device, and the miter gear device is not provided between the traveling drive device and the driving section. By arranging the wheel device, the distance between the foremost (last) turning type wheel device and the foremost part of the vehicle (rearmost end of the vehicle) can be shortened, and the traveling drive device is separated from the driving unit. Can be arranged.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
FIG. 1 shows a state in which the vehicle is used in a front and rear driving unit type traveling bogie.
This will be described with reference to FIG.

1 to 3, a traveling vehicle 1 as an example of an industrial vehicle is provided with driving parts 3 and 4 at both front and rear ends of a vehicle body 2, and covers both driving parts 3 and 4. In this state, a carrier 5 is provided above the vehicle body 2. Wheel devices are provided at a plurality of front and rear portions (six front and rear portions in the embodiment) on the lower side of the vehicle body 2, wherein the wheel devices are two non-slewing type wheel devices 10 at a central portion.
And two turning wheel devices 30 at the front and rear, respectively.

In FIGS. 1, 2, 4 and 5, the non-slewing type wheel device 10 has a rotatable frame body 12 supported by a vehicle width direction shaft 11 provided on the vehicle body 2 side. And
At the top of the frame body 12, an upper arm 13 extending in the vehicle length direction is continuously provided from a central portion in the vehicle width direction.
A lower arm 14 extending in the vehicle length direction is continuously provided from two places in the vehicle width direction below the frame body 12. An axle 15 is provided between the free ends of the arms 13 and 14, and wheels 16 are provided on both ends of the axle 15 in the vehicle width direction. Further, a cylinder device (an example of a vertical swing device) 17 for vertically swinging the lower arms 14 is provided between the lower arms 14 and the vehicle body 2. An example of the non-slewing wheel device 10 is configured by the above 11 to 17.

A miter gear device 20 for transmitting power in a right angle direction is provided on the arms 13 and 14, that is, on the frame body 12. At this time, the miter gear device 20 has an input shaft 21 extending in the vehicle width direction. The device main body 23 is fixed to the frame body 12 with the output shaft 22 in the vehicle length direction. An output shaft 22 of the miter gear device 20 is linked to the axle 15 via a shaft 24 in the vehicle length direction, rotary joints 24a, 24b, and the like. The input shaft 21 of the miter gear device 20 is linked to the traveling drive device 25 side.

The traveling drive unit 25 includes a non-swinging wheel device 10 and a turning wheel device 30 adjacent to the non-swinging wheel device 10 and not provided with the miter gear device 20.
And is supported on the vehicle body 2 side. That is, the traveling drive device 25 includes an engine 26, a transmission 27 arranged in the vehicle width direction with respect to the engine 26, and a drive shaft 28 from the transmission 27 and the input shaft 21 of the miter gear device 20. Are linked via a transmission shaft 29 in the vehicle width direction.

In FIGS. 1, 2 and 6, the turning type wheel device 30 is disposed in a pair in the vehicle width direction at each position (four positions in the front and rear in the embodiment). Each turning type wheel device 30 includes an upper bracket 32 that is rotatable about a longitudinal axis 31 with respect to the vehicle body 2, a lower bracket 34 connected to a lower end of the upper bracket 32 via a lateral shaft 33, An axle 35 provided on the lower bracket 34, a wheel 36 and a wheel drive unit 37 provided on the axle 35,
It is constituted by a cylinder device 38 provided between the four. Turning wheel device 3 according to 31 to 38 described above
0 is configured.

The operation of the above embodiment will be described below. The traveling vehicle 1 travels forward, for example, by driving on the driving unit 3, and travels rearward by driving on the driving unit 4. At this time, the traveling carriage 1 can be turned to the left or right by turning the upper bracket 32 of the turning type wheel device 30 forward or backward by a turning drive device (not shown).

In traveling back and forth including such a turn,
In the traveling drive device 25 of the non-slewing type wheel device 10, the rotation of the engine 26 is transmitted to the drive shaft 28 via the transmission 27.
And the rotation of the input shaft 2 of the miter gear device 20 via the transmission shaft 29 in the vehicle width direction.
1 is transmitted. Next, after being taken out to the output shaft 22 of the miter gear device 20 in the vehicle length direction, it is transmitted to the axle 15 via the shaft 24 in the vehicle length direction. In the turning wheel device 30, the rotation of the wheel drive unit 37 is transmitted to the axle 35.

Then, the cylinder device 17 of the non-slewing type wheel device 10 is contracted and moved to rotate each arm 13, 14 and the like upward around the vehicle width direction shaft 11, and the solid line or the imaginary line A in FIG. As shown, wheels 16 via axle 15
And the cylinder device 38 of the revolving wheel device 30 is contracted and moved to rotate the lower bracket 32 upward around the lateral axis 33, and through the axle 35 as shown by the phantom line in FIG. By raising the wheels 36, the loading platform 5 side can be set to the lowered position. In this state, the traveling carriage 1 is caused to travel in the (or empty) gate-shaped supporting frame (supporting platform) 40 on which the transported object 39 is placed, as shown in FIGS. 1A and 3. As described above, the carrier 5 is positioned below the support frame 40.

Next, contrary to the above, the cylinder device 17 of the non-slewing type wheel device 10 is extended to move each arm 13,
14 and the like, the wheels 16 are lowered via the axle 15 and the cylinder device 38 of the revolving wheel device 30 is extended to move the lower bracket 32 as shown by the imaginary line B in FIG. By lowering the wheel 36 via the axle 35 as shown by the solid line in FIG. 6, the support frame 40 can be raised by raising the loading platform 5 side as shown in FIG. 1B. Thus, the transported object 39 can be transported.

In the traveling vehicle 1 performing such an operation, the arms 13 and 1 are provided on the non-slewing type wheel device 10 side.
A miter gear device 20 is provided on the fourth side, and its input shaft 21
Is linked to the traveling drive device 25 and the output shaft 2
2 is linked to the axle 15, the shaft 24 for linking the output shaft 22 of the miter gear device 20 and the axle 15 can be shortened in the vehicle length direction, and the vertical swing of the non-slewing wheel device 10 can be reduced. Motion, ie, bed 5
The amount of change in the shaft length during lifting and lowering of the shaft can be greatly reduced.

A traveling drive unit 25 is provided adjacent to the non-slewing wheel unit 10, and a turning wheel unit 30 is provided between the traveling drive unit 25 and the driving units 3 and 4. The distance L1 between the second front wheel (the second rearmost) turning type wheel device 30 and the front end of the vehicle (the rearmost end of the vehicle) is shortened, and the possible climbing angle can be increased. Then, the portion corresponding to the distance L1 of the bed 5 is shortened, so that the allowable eccentric load region can be expanded. Further, since the traveling drive device 25 is disposed separately from the driving units 3 and 4, heat, vibration, noise, and the like of the traveling drive device 25 are less likely to be transmitted to the driving units 3 and 4.

In the above-described embodiment, the driving units 3 and 4 are provided at the front and rear ends of the vehicle body 2, respectively. However, the driving units may be provided in only one of them. .

In the above-described embodiment, both operating units 3, 4
A bed 5 is provided above the vehicle body 2 so as to cover the upper part of the vehicle body.
May be a format in which the part is not located.

In the above-described embodiment, the miter gear device 20 is provided at the two non-slewing type wheel devices 10 at the central portion. However, this may be at one location, at two or more locations, or at all locations. And a gear device 20 may be provided.

[0026]

According to the first aspect of the present invention, the miter gear device is provided on the arm side, and the input shaft thereof is interlocked with the traveling drive device, and the output shaft is interlocked with the axle via the shaft. Thus, the shaft can be shortened in the vehicle length direction, and the amount of change in the shaft length when the wheel device is vertically swung, that is, when the bed is raised and lowered can be significantly reduced.

According to the second aspect of the present invention,
By disposing the traveling drive device adjacent to the wheel device provided with the miter gear device, and by disposing the wheel device without the miter gear device between the traveling drive device and the driving unit,
The distance between the foremost (last) turning type wheel device and the foremost part of the vehicle (rearmost end of the vehicle) can be shortened, and the climbable angle can be increased. The unbalanced load area can be expanded. Further, since the traveling drive unit can be disposed separately from the driving unit, heat, vibration, noise, and the like of the traveling drive unit can be hardly transmitted to the driving unit side.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention, and is a partially cutaway side view of an industrial vehicle, where A is when a bed is lowered and B is when a bed is raised.

FIG. 2 is a plan view of the industrial vehicle.

FIG. 3 is a front view of the industrial vehicle.

FIG. 4 is a partially cutaway side view of a non-turn type wheel device portion of the industrial vehicle.

FIG. 5 is a partially cutaway plan view of a non-turning wheel device portion of the industrial vehicle.

FIG. 6 is a partially cutaway side view of a turning type wheel device portion of the industrial vehicle.

FIG. 7 shows a conventional example, and is a partially cutaway side view of an industrial vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling trolley (industrial vehicle) 2 Body 3 Operating part 4 Operating part 5 Carrier 10 Non-slewing type wheel device 11 Vehicle width direction axis 12 Frame body 13 Upper arm 14 Lower arm 15 Axle 16 Wheel 17 Cylinder device (vertical rocking device) Reference Signs List 20 miter gear device 21 input shaft 22 output shaft 24 shaft 25 traveling drive device 26 engine 27 transmission device 29 transmission shaft 30 revolving wheel device 31 longitudinal axis 35 axle 36 wheel 37 wheel drive unit 38 cylinder device 39 transported object 40 support frame

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Claims (2)

[Claims] 1. An industrial vehicle in which a driving unit and a loading platform are provided on a vehicle body and wheel devices are provided at a plurality of front and rear portions on a lower side of the vehicle body, and at least one wheel device of a wheel device group. Is constituted by an arm provided to be vertically swingable with respect to the vehicle body side, an axle provided to this arm, wheels provided to this axle, and a vertically swinging device interlocked with the arm. On the arm side, a miter gear device whose input shaft is in the vehicle width direction and whose output shaft is in the vehicle length direction is provided, and the input shaft is interlocked with the traveling drive device side, and the output shaft is An industrial vehicle that is linked to the axle via a longitudinal shaft. 2. A driving unit is provided at each of the front and rear ends of the vehicle body, and a loading platform is provided at an upper portion of the vehicle body so as to cover above both the driving units. The driving device is provided with a device, and a traveling drive device supported on the vehicle body side is disposed between the two-wheel device and the wheel device adjacent to the both-wheel device and not provided with the miter gear device. The industrial vehicle according to claim 1, wherein: