JPH0597074A - Running vehicle for elevation - Google Patents

Abstract

PURPOSE:To provide a running vehicle which performs running on a flat ground by means of ground touching wheels and performs running over a stepped place by revolution of the ground touching wheels along with rotation of a support arm through a single drive source. CONSTITUTION:A running vehicle for elevation is formed in such a way that a plurality of support arms 5 are extended radially in relation to an axle 4 for supporting a machine body by means of bearings and ground touching wheels 6 are supported at the tip of each support arm 5 and through rotational drive of each support arm 5 around the axis of the axle 4, running over a stepped place is practicable. Drive wheels 9 are mounted on the tip parts of the axle 4, and the drive wheels 9 and each ground touching wheel 6 are linked together so that a rotation power is capable of being transmitted in the same rotational direction. A cylinder shaft 8 is fitted in the same axial core state around positioned outside of the axle 4. The cylinder shaft 8 is coupled to each support arm 5, and a drive switching mechanism A is provided to effect switching to a state where the axle 4 is rotationally driven or to a state where the cylinder shaft 8 is rotationally driven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating traveling vehicle capable of traveling up and down by riding on a stepped portion such as stairs, and more specifically, a plurality of support arms extending radially with respect to an axle supporting a vehicle body. Further, the present invention relates to an elevating traveling vehicle in which a ground wheel is supported at the tip of each support arm, and each support arm is rotationally driven around the axis of the axle so that it can travel over a step.

[0002]

2. Description of the Related Art Conventionally, in the above traveling vehicle for lifting and lowering, as disclosed in JP-A-60-219169, a motor for rotationally driving the support arm and a motor for rotationally driving the ground wheel are provided. There was a configuration that was provided separately for each.

[0003]

However, in the above-mentioned conventional structure, it is necessary to separately provide a motor having a large driving force for traveling the vehicle body, which results in a high cost and a large weight. Yes, there was room for improvement. An object of the present invention is to eliminate the above-mentioned problems by a rational drive structure.

[0004]

According to a characteristic configuration of the present invention, in the traveling vehicle for lifting and lowering described at the beginning, a drive wheel is attached to a tip end portion of the axle, and the drive wheel and the grounding wheels are in the same rotation direction. And a cylindrical shaft fitted on the outer side in the radial direction of the axle with substantially the same axial center, and the cylindrical shaft and each of the support arms are connected to drive the axle in rotation. The point is that a drive switching mechanism is provided that can switch between the operating state and the rotational driving state of the cylinder shaft.

[0005]

When the drive switching mechanism is switched and set to rotate and drive the axle, the power of the axle is transmitted to each grounding wheel via the drive wheel, and two of the plurality of grounding wheels are grounded to drive the vehicle body. In the supported state, the ground wheel is driven and rotated,
The vehicle body can be driven to travel. Then, when the drive switching mechanism is switched and set to drive the cylinder shaft, each support arm is rotationally driven around the cylinder shaft axis via the cylinder shaft, and each set wheel also similarly has the cylinder shaft shaft core. Revolve around. As a result, it becomes possible to travel up and down while riding on a step. In this way, the drive from the same drive source can be switched between the rotational drive of the support arm and the drive of the ground wheel.

[0006]

Therefore, by reasonably improving the transmission system, only one drive source is required, but the state of smooth running on a flat ground due to the rotation of the grounding wheel and the support arm. An up / down traveling vehicle that can reduce the weight of the vehicle body at a low cost by simplifying the structure can be realized by making it possible to reveal the traveling state over the step due to the revolution of the grounding wheel accompanying the rotation. I can do it.

[0007]

Embodiments will be described below with reference to the drawings. Figure 3
Fig. 1 shows a walk-type luggage carrier that is an example of an elevating traveling vehicle and that can climb over steps such as stairs. In this transport vehicle, a loading platform 1 for supporting loading of a load is grounded and supported by a pair of left and right traveling devices 2, and a walking control handle 3 is extended rearward from the loading platform 1.

The steering handle 3 is provided with a pair of upper and lower grip portions 3a and 3b. When the vehicle body is stopped, the lower grip portion 3b is grounded so that the loading platform 1 maintains a substantially horizontal posture. In addition to the above configuration, when traveling on a flat ground, the loading platform 1 can be steered while holding the upper grip portion 3a while maintaining a substantially horizontal posture. Also, when going up and down the stairs, as shown in FIG.
By manipulating the grip portion 3b on the lower side, it is possible to maintain the cargo bed 1 in a substantially horizontal posture without taking an uncomfortable posture.

Next, the traveling device will be described. As shown in FIGS. 1 and 2, each of the left and right traveling devices 2 radially extends three support arms 5 at equal angles with respect to an axle 4 that supports the body, and the tip of each support arm 5 is extended. Ground wheels 6 respectively
The support arms 5 are rotatably driven around the axis of the axle 4 so that they can run on a step. More specifically, an axle 4 is provided so as to project from the transmission case 7 disposed in the center portion in the width direction of the vehicle body toward both left and right outer sides, and a cylinder is coaxially arranged on the outer side in the radial direction of the axle 4. The shaft 8 is fitted so as to be relatively rotatable, and the support arms 5 are fixedly connected to the case outer side shaft end of the cylindrical shaft 8.
Further, a drive wheel 9 that integrally rotates around the axle axis is attached to the shaft end of the axle 4, and the drive wheel 9 and each ground wheel 6 are linked to each other by friction interlocking so that rotational power can be transmitted.

In the transmission case 7, the drive switching mechanism A is switchable between the state in which the axle 4 is driven to rotate and the state in which the cylinder shaft 8 is driven to rotate by the power of the traveling drive electric motor M. Is equipped with. That is, the shift gear 11 is spline-fitted to the drive shaft 10 driven by the electric motor M, and the shift gear 11 is engaged with the driven gear 12 mounted on the axle 4 and the driven gear 13 mounted on the cylinder shaft 8. A shift fork 14 that can be shift-changed between the states is provided, and the shift fork 14 is shift-operated by the operation of the switching operation lever 15 so that the shift fork 14 can be switched between the states to configure the drive switching mechanism A. .. The left and right cylindrical shafts 8 and 8 are linked by a gear transmission mechanism 16 so as to rotate integrally. According to this structure, when traveling on a flat ground, the driving wheel 9 rotates while the two grounding wheels 6 are grounded by switching and setting the axle 4 so as to drive and rotate. The ground wheels 6 are rotationally driven in the same rotation direction by the friction interlocking, and the rotation of the ground wheels 6 drives the vehicle body to travel. Then, when going up and down the stairs, the tubular shaft 8 is set to be driven and rotated, and the support arm 5 is rotated around the axial center of the tubular shaft 8 to revolve each grounding wheel 6 to revolve. You can go up and down stairs, as shown in.

[Other Embodiments] As a drive source, an engine is used in place of the electric motor M, a transmission mechanism is interposed during transmission, and clutches are provided in respective transmission systems for the axle 4 and the cylinder shaft 8. The drive switching mechanism A may be configured so that each clutch is switched to switch on and off.
Further, the drive interlocking structure between the drive wheel 9 and the ground wheel 6 may be configured by chain interlocking or gear interlocking instead of the friction interlocking structure as described above.

It should be noted that reference numerals are added to the claims for facilitating the comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Fig. 1] Transmission system diagram

[Figure 2] Plan view of the carrier

[Fig. 3] Side view of the carrier

[Fig. 4] Side view of the carrier

[Explanation of symbols]

 4 Axle 5 Support arm 6 Grounding wheel 8 Cylindrical shaft 9 Drive wheel A Drive switching mechanism

Claims (1)

[Claims] 1. A plurality of support arms (5) are radially extended with respect to an axle (4) for supporting an airframe, and a ground wheel (6) is supported at the tip of each support arm (5), An elevating traveling vehicle in which each support arm (5) is rotationally driven around the axis of the axle (4) so as to be able to ride over a step and to travel, and a drive wheel is provided at the tip of the axle (4). (9) is attached, and the drive wheel (9) and each of the ground wheels (6) are linked so that rotational power can be transmitted in the same rotational direction.
A cylinder shaft (8) is fitted on the outer side in the radial direction of the axle (4) in a state of substantially the same axis, and the cylinder shaft (8) and each of the support arms (5) are connected to each other, and the axle ( 4) An elevating traveling vehicle provided with a drive switching mechanism (A) which is switchable between a state in which 4) is rotationally driven and a state in which the cylinder shaft (8) is rotationally driven.