JPH079037U - Wheel unit - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a wheel unit capable of preventing the cable from being broken or the cable sheath from being broken near the cable outlet. [Structure] A steering unit 10, a traveling unit 20 which is rotated by being steered by the steering unit 10, and is drawn out to the steering unit 10 through a rotation base shaft 25 of the traveling unit 20, and is loosely wound around the rotation base shaft 25. The cables 30a to 30c are provided, and the cable fixing member 40 that is provided at the cable outlet 26 of the rotation base shaft 25 and that prevents the cables 30a to 30c from bending in the direction opposite to the winding direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wheel unit for mobile robots used in factories and warehouses. In particular, the present invention relates to a wheel unit capable of preventing the cable pulled out to the steering section through the rotation base shaft of the traveling section from being broken.

[0002]

[Prior art]

 FIG. 3 is a vertical sectional view showing an example of a wheel unit used in a conventional mobile robot or the like.

In FIG. 1, the wheel unit includes a steering section 10 and a traveling section 20 that is steered by the steering section 10 to rotate.

The steering unit 10 is provided with a steering motor 11 for steering the traveling unit 20. The traveling unit 20 is configured to rotate about the axis Y within a range of 230 degrees by the operation of the steering motor 11.

The traveling unit 20 includes a traveling motor 21, wheels 22 driven by the traveling motor 21, a brake 23, and an encoder 24.

Reference numeral 30 a is a cable for driving the traveling motor 21, 30 b is a cable for controlling the brake 23, and 30 c is a signal cable for the encoder 24. These cables 30a to 30c pass through the hollow rotation base shaft 25 of the traveling unit 20 and are drawn out to the inside 10a of the steering unit 10 from the outlet 26 of the rotation base shaft 25, and further to the main body of the mobile robot or the like. It is connected.

The wheel unit having such a configuration is attached to a predetermined position of a mobile robot or the like, and controls traveling of the mobile robot or the like.

[0008]

[Problems to be solved by the device]

 The conventional wheel unit described above has the following problems.

The traveling unit 10 was steered by the steering unit 20 and rotated about the axis Y. Therefore, depending on the direction of rotation of the traveling unit 10, the cables 30a to 30c frequently repeat bending around the outlet 26, which may cause disconnection of the cables 30a to 30c. Further, if such bending is repeated, the three cables may interfere with each other and rub against each other, and the coating between the cables may be broken.

An object of the present invention is to solve the above problems and to provide a wheel unit capable of preventing the cable from being broken or the cable sheath from being broken near the outlet of the cable. To provide.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a steering unit, a traveling unit that is rotated by being steered by the steering unit, and a steering shaft of the traveling unit that is pulled out to the steering ring unit to rotate around the rotation shaft. The cable is loosely wound around the cable, and the cable fixing member is provided at the cable outlet of the rotation base shaft to prevent the cable from bending in a direction opposite to the winding direction.

[0012]

[Operation effect]

 Since the present invention has the above-mentioned configuration, it has the following operational effects.

That is, since the cable is pulled out to the steering unit through the rotation base shaft of the traveling unit and is loosely wound around the rotation base shaft, the cable flexibly follows the rotation of the traveling unit.

Since the cable fixing member for restricting the bending of the cable in the direction opposite to the winding direction is provided at the cable outlet of the rotating base shaft, the cable fixing member is provided at the cable outlet in the winding direction. It can be bent and fixed, and the repeated bending of the cable due to the rotation of the traveling portion can be prevented.

Therefore, according to the wheel unit of the present invention, it is possible to prevent the cable from being broken and the coating of the cable from being broken near the outlet of the cable.

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view showing an embodiment of a wheel unit according to the present invention, and FIG. 2 is a perspective view of a main part. The same parts as those in the conventional example are designated by the same reference numerals.

In these drawings, the cables 30 a to 30 c are drawn out from the outlet 26 to the inside 10 a of the steering unit 10 through the rotation base shaft 25 of the traveling unit 20, and are loosely wound around the rotation base shaft 25. After that, it is pulled out of the steering unit 10.

Reference numeral 40 denotes a cable fixing member provided at the outlet 26, and the cables 30a to 30c pulled out from the outlet 26 are wound at the outlet 26 in a winding direction around the rotation base shaft 25 (arrow in FIG. 2). It is designed to control bending in the direction opposite to the (X1 direction).

According to the wheel unit having such a configuration, the cables 30a to 30c are pulled out to the steering unit 10 through the rotation base shaft 25 of the running unit 20 and are loosely wound around the rotation base shaft 25. Therefore, the cables 30a to 30c can flexibly follow the rotation of the traveling unit 20.

Since the cable outlet 26 of the pivot shaft 25 is provided with a cable fixing member 40 that restricts bending of the cables 30a to 30c in the direction opposite to the winding direction, the cable outlet 26 is provided. 26, each cable 30a to 30c can be bent and fixed in the winding direction (the direction of the arrow X1 in FIG. 2), and the repeated bending of the cables 30a to 30c due to the rotation of the traveling unit 20 can be prevented. You can

Therefore, according to the wheel unit of this embodiment, it is possible to prevent the cables 30a to 30c from being broken or the coating of the cables 30a to 30c from being broken near the cable outlet 26. You can

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the invention.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a wheel unit according to the present invention.

FIG. 2 is an enlarged perspective view of a main part.

FIG. 3 is a vertical cross-sectional view showing a conventional wheel unit.

[Explanation of symbols]

 10 Steering part 20 Traveling part 25 Rotating base shaft 26 Drawing port 30a-30c Cable 40 Cable fixing member

Claims (1)

[Scope of utility model registration request] 1. A steering unit, a traveling unit which is rotated by being steered by the steering unit, and a cable which is drawn out to the steering unit through a rotation base shaft of the traveling unit and is loosely wound around the rotation base shaft. A wheel unit provided with a cable fixing member that is provided at a cable outlet of the rotation base shaft and that prevents the cable from bending in a direction opposite to a winding direction.