JPS6340327Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a traveling device for a straddle carrier.

<Prior Art and Problems to be Solved by the Present Invention> Conventionally, in this type of traveling device, the power unit was provided on the upper frame, which made the center of gravity of the vehicle high and unstable. Therefore, for example, vehicle speed 20-30
When turning at a speed of Km/h, container loading was limited to a vehicle height that allowed for three-tier stacking due to vehicle stability, and the height of containers transported at one time was small. Another problem was that inspecting the power plant was troublesome.

In order to solve this problem, a technique has been proposed in which an engine as a power unit is disposed in the lower frame, as disclosed in Japanese Utility Model Application No. 56-87341.

However, this technology does not require a differential between the left and right drive wheels, so two engines are required.
The left and right frames must be placed respectively. Moreover, when turning, the drives must be controlled individually, and when traveling in a straight line, both must be synchronized. Therefore, there is a problem that the drive control of both drive wheels becomes complicated.

In view of the above, the purpose of the present invention is to provide good stability and
It is an object of the present invention to provide a traveling device for a straddle carrier that allows containers to be stacked in four layers and also allows easy inspection of a power unit and the like and travel control of drive wheels.

<Embodiment> Hereinafter, an embodiment of the present invention will be described based on FIGS. , 3, a power device 5 provided in the right lower frame 3, a differential device 6 provided in the center of the upper frame 1, a transmission means 7 for transmitting power from the power device 5 to the differential device 6;
From the differential device 6 to the left and right lower frames 2 and 3
It is provided with a transmission mechanism 10 for transmitting power to left and right drive wheels 8 and 9 on the lower side.

The power device 5 is, for example, a diesel engine, and the transmission means 7 includes a hydraulic pump 11 whose input shaft is connected to the output shaft of the power device 5 on the right lower frame 3, and the upper frame. A hydraulic motor 13 mounted on the center of the pump 1 and having a motor shaft 13a connected directly (or via a transmission) to the differential device 6, and a hydraulic pipe 14 connecting the motor 13 and the pump 11. It is configured.

The transmission mechanism 10 includes the differential device 6
Horizontal shafts 15a, 15b connected to both left and right sides of
, vertical shafts 17a and 17b connected to the outer ends of the horizontal shafts via a gear device 16, and a final reduction gear 19 connected to the lower ends of the shafts and driving the wheels 18 of the drive wheels 8 and 9. It consists of

In addition, in the figure, 20 is the spreader, 21 is the upper frame 1
22 is a support member for supporting the differential gear 6 and the hydraulic motor 13 on the upper frame 1, and 23 is left and right idlers.

In the above configuration, the hydraulic pump 11 is driven by the drive of the power unit 5, and the hydraulic motor 13 of the upper frame 1 is driven.
is driven. And, the power is the motor shaft 13a
from the differential device 6, the left and right horizontal shafts 15a, 15b,
The signal is transmitted to the left and right drive wheels 8, 9 via the vertical shafts 17a, 17b and the speed reducer 19, and the drive wheels 8, 9 are driven.

In addition, the hydraulic pump 11 and the hydraulic motor 13 are
In the power transmission system from the power device 5 to the left and right drive wheels 8, 9, it is provided in front of the power device and the final reduction gear 19, so that the capacities of the pump 11 and the motor 13 can be set small.

In this way, the power unit 5 is disposed on the lower frame 3, and the center of gravity of the vehicle can be lowered, making the vehicle stable even when turning. Therefore, it is possible to increase the vehicle height and increase the loading height from the conventional three-level stacking to four-level stacking.

Furthermore, since the power is transmitted to the left and right drive wheels 8 and 9 via the differential device 6 in the center of the upper frame 1, the power unit 5 can also be installed on either the left or right lower frame. In addition, both drive wheels 8 and 9 can be easily synchronized, and travel control is also facilitated.

In addition, in the present invention, the power device 5 may be provided in the left lower frame 2 instead of being provided in the right lower frame 3 as in the above embodiment.

<Effects of the invention> As is clear from the above description, the present invention provides a straddle carrier having an upper frame, left and right lower frames, and a vertical column connecting the upper frame and the left and right lower frames. a power device provided in the lower right frame, a differential device provided in the center of the upper frame, a transmission means for transmitting power from the power device to the differential device, and a differential device provided in the center of the upper frame; The apparatus includes a transmission mechanism for transmitting power from the device to the left and right drive wheels under the left and right lower frames.

Therefore, according to the present invention, heavy objects such as a power unit are disposed on the lower frame, and the center of gravity of the vehicle can be lowered, thereby making the vehicle stable even when turning. Therefore, by increasing the vehicle height, it is possible to increase the container loading height from the conventional three-tier stacking to four-tier stacking. In addition, inspection of the power plant, etc. can be easily performed on either side of the left or right lower frame.

Furthermore, power is transmitted to the left and right drive wheels via the differential in the center of the upper frame, so the power unit only needs to be installed on either the left or right lower frame, and both drive wheels can be Synchronization is easy, and the drive system for turning does not require a complicated mechanism, which has the advantage of making traveling control easier.

[Brief explanation of drawings]

FIG. 1 is a plan view of a straddle carrier showing an embodiment of the present invention, and FIG. 2 is a side view thereof. 1: Upper frame, 2, 3: Lower frame, 4: Vertical column,
5: Power device, 6: Differential device, 7: Transmission means,
8, 9: Left and right drive wheels, 10: Transmission mechanism.

Claims (1)

[Scope of utility model registration request] Upper frame 1, left and right lower frames 2 and 3, and upper frame 1
and a vertical column 4 that connects the left and right lower frames 2 and 3.
A straddle carrier comprising: a power device 5 provided on the left or right lower frames 2, 3; a differential device 6 provided in the center of the upper frame 1; and a power source from the power device 5. The differential device 6
a transmission means 7 for transmitting data to the differential device 6;
A transmission mechanism 1 for transmitting power from the left and right lower frames 2 and 3 to the left and right drive wheels 8 and 9 below the left and right lower frames 2 and 3;
A traveling device for a straddle carrier characterized by comprising: 0.