JPS6261879A - Universal carrying vehicle - Google Patents

Abstract

PURPOSE:To enable stable forward or rearward driving by coupling a driving mechanism rotatable forwardly/rearwardly against the front and rear wheels. CONSTITUTION:It is comprised of a body 1 longitudinally arranged with a bearing 11 with correspondence to the front and rear wheel positions, pairs of front wheels 2, 2a and rear wheels 3, 3a rotatably journaling a hollow support 23 arranged longitudinally on a frame 21 for supporting an axle 22 through respective bearing 11, a travel driving mechanism 4 coupled to a rotary shaft 24 which is coupled through respective bevel gear with the axle 22 in the inner hole of respective hollow support 23 and a steering mechanism 5 coupled to the upper end of each hollow support 23 to axially rotate the frame 21 including the axle 22 against the body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a universal carrier used for handling and transporting cargo in factories, warehouses, etc.

<Summary of the Invention> The present invention provides a vehicle body with bearings installed vertically at the front and rear wheel positions, hollow struts provided on the wheel frames of the front wheels and rear wheels, which are rotatably supported by the respective bearings, A rotating shaft is provided in the inner hole of the hollow column and connected to the axle via a bevel gear, and a transmission means is connected to the rotating shaft, a travel drive mechanism is connected to a drive motor via a forward/reverse rotation mechanism, and a traveling drive mechanism is provided for each hollow column. It consists of a steering mechanism that connects a drive motor through a transmission means and a forward/reverse rotation mechanism, which simplifies the structure and assembly work and improves the stability and speed of running and steering operations. BACKGROUND OF THE INVENTION Conventionally, various types of flexible vehicles for handling and transporting cargo have been put into practical use. For example, before.

In the case of wheels that have a steering function for the rear wheels, the structure of the wheels becomes complicated, requiring a large amount of effort to assemble and adjust, and there is a risk that the steering operation will be erroneous.

<Objective of the Invention> An object of the present invention is to provide a new universal carrier that can simplify the structure and assembly work and improve the stability and speed of traveling and steering operations.

<Structure and Effects of the Invention> In order to achieve the above object, the present invention provides a hollow support vertically installed on a frame supporting the front and rear axles, which is rotatably supported on the vehicle body. A rotating shaft is provided in the inner hole of the hollow column and connected to the axle using a bevel gear, and a motor is coupled to the rotating shaft via a transmission means and a forward/reverse rotation mechanism to generate a traveling drive mechanism, and also to transmit power to the hollow column. A steering mechanism is constructed by linking a motor through a forward and reverse rotation mechanism.

According to the above configuration, in the present invention, since the front and rear wheels are connected to travel drive mechanisms that rotate in the forward and reverse directions, stable forward rotation or reverse rotation is achieved. In addition, a steering mechanism that rotates each support in forward and reverse directions is connected to the hollow support on the frame that supports the front and rear axles, allowing the front and rear wheels to rotate in any direction around the hollow support. Therefore, it has practical effects such as realizing forward, backward, lateral movement, diagonal movement of the transport vehicle, and change of direction around an arbitrary position of the vehicle body as the center of rotation.

<Description of Embodiments> FIG. 1 shows a planar configuration diagram of a universal conveyance vehicle according to the present invention.

The universal guided vehicle includes a vehicle body 1 in which bearings 11 are vertically installed corresponding to the positions of front wheels and rear wheels, and a hollow support 23 is installed vertically on a frame 21 that supports an axle 22. A pair of front wheels 2, 2 rotatably supported on the
a and the rear wheels 3, 3a, and a rotating shaft 24 connected to the axle 22 through a bevel gear in the inner hole of each hollow support 23, respectively.
a traveling drive mechanism 4 that is connected to the rotating shaft 24 and rotates the axle 22 in forward and reverse directions; and a steering mechanism that is connected to the upper end of each hollow support 23 and that rotates the frame 21 including the axle 22 relative to the vehicle body 1. It consists of a mechanism 5.

The axles 22 of the front and rear wheels 2.2a and 3.3a are rotatably supported on the frame 21 via metal or bearings, and two wheels 25 are mounted on the axles at appropriate intervals. The shaft is fixed, and one wheel is rotatable by a bearing. Further, a driven gear 26 of a bevel gear is fixed between the two axles 25, and the driven gear 26 meshes from one side with a drive gear 27 fixed to the lower part of the rotating shaft 24 in the hollow support 22. The engagement point is axle frame 2
By rotating around the ten axes, it is displaced around the entire circumference of the drive gear 27, and the running driving force from the drive mechanism 4 is transmitted to the axle 22.

The traveling drive mechanism 4 has a driven gear 28, which is a bevel gear, fixed to the upper end of each rotating shaft 24, and a deceleration drive motor 41 with a brake is mounted on the vehicle body 1, and a transmission means 42, such as a chino, is attached to the motor shaft. an intermediate shaft 43 connected through the intermediate shaft 43; a forward/reverse rotation mechanism 4 with a built-in gear connected to one end of the intermediate shaft 43;
4. A pair of left and right transmission shafts 45.45a are arranged in parallel to the forward and reverse rotation mechanism 44 and the other end of the intermediate shaft 43, corresponding to the front and rear wheels 2, 2a, 3.3a, A drive gear 46 of a bevel gear is fixed on each of the rolling shafts 45.45a, and meshes with a driven gear 28 at the upper end of the corresponding rotating shaft 24.
53 rotates, each rotating shaft 24 rotates in unison, driving the axle 22 to rotate in the forward or reverse direction via the bevel gears 26, 27, thereby causing the vehicle to travel.

In the steering mechanism 5, a worm gear 29 is fixed to the upper end of each hollow support 23, and a deceleration motor 51 with a brake is connected to the vehicle body 1 via a transmission means 52 such as a chain. a driven shaft 53, and a forward/reverse rotation mechanism 54 connected to both ends of the driven shaft 53. 54 a
, two forward and reverse rotation mechanisms 54, 54a and the driven shaft 53, respectively, and two front and rear transmission shafts 5 parallel to each other on the same side of both front shafts and the same other side of both rear wheels.
5.55a, 56.56a are arranged, and a worm 57 is fixed to each transmission shaft and meshed with the worm gear 29 at the upper end of the corresponding hollow support 23. When the motor 51 operates, each transmission shaft 55. 55 a, 56. 56 a is reversed or forward, each hollow support 23 becomes a worm 57
, are decelerated and rotated simultaneously in the forward or reverse direction via the worm gear 29, and each axle frame 21 is rotationally displaced relative to the vehicle body 1.

In addition, in the configuration example of the front and rear wheel traveling drive mechanism 4 shown in FIG. 1, when the front wheels 2 and 2a are shown in FIG. Position the front and rear wheels 2.2a.

3. Set 3a to rotate forward or reverse.

However, the transmission shaft 45.45a is extended above the rear wheel driven gear 2B, and the drive gear 46 is connected to the driven gear 28 in the same way as the front wheel.
3, the same structure shown in FIG. 3 can be applied to the front and rear wheels.

However, when driving straight forward or backward, the front.

The axles 22 of the rear wheels 2.2a, 3.3a are located perpendicular to the direction of travel (FIG. 4A).

When the traveling drive mechanism 4 is operated in this state, each rotating shaft 24 rotates in unison, rotating the axle 22 via the bevel gears 26, 27, and moving forward or backward.

Next, when moving forward or backward in a diagonal direction, the steering mechanism 5
When operating each transmission shaft 55.55a.

5-6. The engagement of the worm 57 on 56a and the worm gear 29 rotates the hollow support 23 and therefore the axle frame 21, and each axle 22 is tilted relative to the vehicle body 1 (Fig. 4B).
). At this time, the meshing positions of the rotating shaft 24 and the gears 26, 27 of the axle 22 in the front and rear wheels 2.2a, 3.3a are displaced. When operating the travel drive mechanism 4 in this state, each rotating shaft 24 rotates at the same time, and as in straight travel,
The axle 22 is rotated via bevel gears 26 and 27 to move forward or backward in an oblique direction. Furthermore, in the case of sideways travel, the steering mechanism 5 is operated to position the axles 22 of the front and rear wheels 2.2a, 3.3a in the longitudinal direction of the vehicle body 1 (FIG. 4C), as described above. By operating the travel drive device 4, the vehicle travels sideways.

Next, when changing the direction of the transport vehicle, when switching one of the forward and reverse rotation mechanisms 54, 54a in the steering mechanism 5 to the forward rotation side and the other to the reverse rotation side and operating, the worm 57 and the worm gear 29 located diagonally The worm 57 and the worm gear 29 rotate in the same direction and in the opposite direction relative to the other diagonally located worm 57 and the worm gear 29, and the axles 22 of the front and rear wheels are rotated in the front direction.

The rotating shafts 24 are located tangentially to an imaginary circle whose radius is the center surrounded by the rear wheels (Fig. 4D).In this state, by operating the traveling drive mechanism 4, each rotating shaft 24 rotates at the same time. , the direction is changed by rotating the axle 22.

It goes without saying that the universal guided vehicle of the present invention can run unmanned using an electromagnetic guidance device, an optical guidance device, or other guidance device.

As described above, the present invention includes vertically disposed hollow struts 23 on the axle frames 21 of the front and rear wheels, which are rotatably supported on the vehicle body 1, and a rotating shaft 24 provided in the inner hole of each hollow strut 23. Since the travel drive mechanism 4 that rotates in forward and reverse directions is connected to this rotating shaft 24, and the steering mechanism 5 is connected to the hollow support 23, each axle can be rotated in the forward or reverse direction. The frame 21 can be rotated, so it can move straight,
Diagonal running, sideways running 9. Realizes direction changes centered around the midpoint between the front and rear wheels.

Moreover, since the present invention uses a normal ring-shaped wheel 25, the configuration and assembly work are simple and there is no risk of failure.
Achieve stable running.

Further, since the steering mechanism 5 has a mechanical configuration, it always operates accurately, has excellent responsiveness, and realizes quick operation, and has remarkable practical effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a configuration example of a universal guided vehicle according to the present invention, FIG. 2 is a cross-sectional view taken along the line nn in FIG. 1, FIG. 3 is a vertical cross-sectional view of front and rear wheels, and FIG. 4 A -D is a schematic diagram showing an example of traveling of the transport vehicle.

Claims (1)

[Scope of Claims] A vehicle body in which bearings are vertically installed at each of the front and rear wheels, and a front and rear wheel in which a hollow support is provided on a frame that supports the axle and is rotatably supported on each of the bearings. A rotating shaft is provided in the inner hole of each hollow support, and a traveling drive mechanism is connected to this rotating shaft to rotate the axle in forward and reverse directions, and a frame including the axle is connected to each hollow support to rotate the frame relative to the vehicle body. A universal conveyance vehicle characterized by comprising a steering mechanism.