JPH05187456A - Method and apparatus for driving rotated shaft - Google Patents

Abstract

PURPOSE:To provide method and apparatus for driving a rotated shaft which enables the rotation in the normal and reverse directions by forming a tooth of chevron shape having a pair of inclined surfaces. CONSTITUTION:Method and apparatus for driving a rotated shaft are constructed so that driving teeth 4 and driven teeth 2 are meshed with each other through a pair of inclined surfaces 2a, 2b, 4a, 4b and axial grooves 2B, 4B to rotate a rotated shaft 1 in the normal and reverse directions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for driving a rotary shaft, and more particularly, to a novel improvement for enabling forward and reverse rotation by forming a tooth shape into a mountain shape having a pair of slopes. Regarding

[0002]

2. Description of the Related Art Conventionally, as a method of driving a rotary shaft of this type which has been used conventionally, the structure shown in FIG. 4 has been adopted. That is, the driven tooth 2 provided on the driven shaft 1 is formed in a sawtooth shape, and the drive tooth 4 of the drive shaft 3 which can be meshed with the driven tooth 2 is also formed in a sawtooth shape. Therefore, in the above-described configuration, when the drive shaft 3 is advanced along the arrow A, the teeth 2 and 4 mesh with each other, and the driven shaft 1 can be rotated by rotating the drive shaft 3.

[0003]

Since the conventional method of driving the rotated shaft has the above-described structure, the following problems exist. That is, since the driven teeth and the driving teeth are saw-toothed, rotation can be transmitted in one direction, but the teeth do not mesh in the opposite direction, so the driven shaft can rotate only in one direction. It was not possible to meet the demand for forward and reverse rotation.

The present invention has been made in order to solve the above-mentioned problems, and in particular, a toothed shaft having a pair of slopes is formed into a mountain shape so that the shaft can be rotated normally and reversely. It is an object to provide a driving method and device.

[0005]

According to a method of driving a driven shaft of the present invention, a drive tooth of a drive shaft which is provided by an actuator and is rotated by a rotary drive member is meshed with a driven tooth of the driven shaft. In the method of driving the rotated shaft, the driven tooth and the driven tooth are meshed via a pair of inclined surfaces and an axial groove,
This is a method of rotating the rotating shaft forward and backward.

More specifically, it is a method of detecting the tip interference state of the driving tooth and the driven tooth with a sensor.

Further, in the driven device of the driven shaft according to the present invention, the drive teeth of the drive shaft, which is provided by the actuator so as to be able to move in and out, and rotationally driven by the rotary drive member, meshes with the driven teeth of the driven shaft. In the driven device for rotating the rotating shaft, the driving tooth and the driven tooth are configured by a mountain portion having a pair of slopes and an axial groove continuous with the mountain portion.

More specifically, it is a structure having a sensor for detecting the tooth tip interference state of the driving tooth and the driven tooth.

[0009]

In the method and apparatus for driving a rotated shaft according to the present invention, the driven teeth of the rotated shaft and the driving teeth of the drive shaft are composed of a mountain portion having a pair of slopes and a groove portion continuous to the mountain portion. Therefore, when the drive shaft is advanced in the non-meshed state, the slopes of the drive teeth come into sliding contact with each other, and at the same time, the axial grooves are engaged with each other so that the rotated shaft and the drive shaft are engaged with each other. Therefore, since each axial groove is in the same direction as the axial direction of each shaft, the rotated shaft can be rotated regardless of whether the drive shaft is rotated in either the forward or reverse direction. When the driven tooth and the driving tooth do not mesh with each other and the tooth tip interference state occurs, the sensor detects the tooth tip interference state by detecting the position of the drive shaft or the position of the actuator rod. After the drive shaft is retracted, it can be engaged by rotating it again and moving it forward.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method and apparatus for driving a rotary shaft according to the present invention will be described in detail below with reference to the drawings. It should be noted that the same or equivalent portions as those of the conventional example will be described by attaching the same reference numerals. 1 to 3 show a driven device for a rotating shaft according to the present invention. FIG. 1 is a sectional view showing the entire structure, FIG. 2 is a configuration diagram showing a meshed state, and FIG. 3 is a tooth tip interference state. It is a block diagram shown.

1 to 3, the reference numeral 10 designates a base, on which a rotary driving body 12 is rotatably provided via a bearing portion 11, and the rotary driving body 12 is Is configured to be rotated via a chain 13 driven by a motor or the like (not shown).

A drive shaft 3 is provided so as to penetrate through the rotary drive body 12 coaxially therewith, and a key groove 3 a formed in the drive shaft 3 has a key 12 a of the rotary drive body 12.
Are engaged. Therefore, the drive shaft 3 and the rotary drive body 1
The drive shaft 3 and the drive shaft 2 rotate integrally with each other, and can reciprocate in the direction of arrow A in the axial direction of the key groove 3a.

A plurality of drive teeth 4 are formed on the tip portion 3A of the drive shaft 3 so as to project in the axial direction, and each drive tooth 4 has a mountain-shaped first chevron portion 4A having a pair of slopes 4a and 4b. The first axial groove 4B is formed continuously with the first chevron portion 4A. Each of the first axial grooves 4B has a straight wall 4Ba extending along the axial direction of the drive shaft 3.

At the rear end 3B of the drive shaft 3, there is a bearing 1
4, a bearing body 15 is provided, and a rod 17a of an actuator 17 is connected to an arm 16 connected to the bearing body 15 via a connecting portion 16a.

The actuator 17 includes the base 10
Is connected to the mounting body 18 of the actuator 17 through a connector 19, and the drive shaft 3 is rotated by the operation of the rod 17a of the actuator 17 in the direction of arrow B so that the drive shaft 3 can move forward and backward along the direction of arrow A. Has been done.

A plurality of driven teeth 2 are formed on an end portion 1a of a rotatable shaft 1 which is rotatably arranged at the tip end of the base 10, and each driven tooth 2 has a pair of driven teeth 2. Slopes 2a, 2
A second chevron-shaped second chevron portion 2A is formed. A second axial groove 2B is formed continuously with the second chevron portion 2A, and each of the second axial grooves 2B has a straight wall 2Ba extending along the axial direction of the rotated shaft 1.

The moving position of the drive shaft 3 in the axial direction shown by the arrow A is the sensor 20 provided near the bearing body 15 or the sensor 21 provided near the arm 16.
Is configured to be detected by.

Next, a case will be described in which the driven teeth 2 and the driving teeth 4 of the shafts 1 and 3 are actually meshed with each other in the above-mentioned configuration. First, when the actuator 17 is operated to move the rod 17a in the direction of the arrow Bb, the drive shaft 3 advances in the direction of the arrow Aa via the arm 16 and the first chevron portion 4A of the drive tooth 4 moves to the driven tooth. 2 through the second chevron portion 2A, and as shown in FIG. 2, each axial groove 2B, 4
B mesh with each other.

In the above-mentioned state, by driving a motor (not shown) connected to the chain 13,
The drive shaft 3 is rotated via the rotary drive body 12, and the rotation of the drive shaft 3 is transmitted to the rotated shaft 1 to rotate the rotated shaft 1 in either forward or reverse directions.

Further, as shown in FIG. 3, each chevron portion 2A,
4A does not mesh with each other, and when the center portions are joined to each other to be in the tooth tip interference state, the respective sensors 20 or 21 are not turned on, whereby the tooth tip interference state is controlled by a control unit (not shown). ) Can be detected. Therefore, when the aforementioned tooth tip interference state is detected, the actuator 17 is immediately actuated to move the rod 17 in the direction of arrow Ba and the drive shaft 3 in the direction of arrow Ab,
The teeth 2 and 4 are separated from each other. Then, after slightly rotating the drive shaft 3 via the rotary drive body 12, the actuator 17 is operated again to move the drive body 3 by the arrow Aa.
The meshing of the teeth 2, 4 can be achieved by advancing in the direction of.

[0021]

Since the method and apparatus for driving the rotated shaft according to the present invention are configured as described above, the following effects can be obtained. That is, the shape of the driven tooth and the driving tooth of the driven shaft and the driven shaft form a mountain portion having a pair of slopes, and the mountain portion has a continuous groove in the axial direction. Is easy to connect and can rotate in either forward or reverse directions through the axial groove.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram showing a driven device for a rotating shaft according to the present invention.

FIG. 2 is a configuration diagram showing a meshed state of a rotated shaft and a drive shaft.

FIG. 3 is a configuration diagram showing a tooth tip interference state between a rotated shaft and a drive shaft.

FIG. 4 is a configuration diagram showing a conventional driven device for a rotated shaft.

[Explanation of symbols]

 1 rotary shaft 2 driven teeth 2a, 2b, 4a, 4b slope 2A, 4A chevron 2B, 4B axial groove 3 drive shaft 4 drive tooth 12 rotary driver 17 actuator 20, 21 sensor

Claims (4)

[Claims] 1. A drive tooth (4) of a drive shaft (3), which is provided by an actuator (17) so that it can be freely moved in and out, and is rotated by a rotary drive body (12). In the method of driving a rotated shaft, which is adapted to rotate the rotated shaft (1) by meshing with the driven tooth (4) and the driven tooth (2), a pair of slopes (2a, 2b, 4a, 4b ) And the axial grooves (2B, 4B) are engaged with each other, and the driven shaft (1) is normally and reversely rotated. 2. The method for driving a rotated shaft according to claim 1, wherein a tip interference state of the driving tooth (4) and the driven tooth (2) is detected by a sensor (20 or 21). .. 3. A drive shaft (3) which is provided by an actuator (17) so as to be able to move in and out and is rotationally driven by a rotary drive body (12).
The drive tooth (4) of the driven shaft (1) is engaged with the driven tooth (2) of the driven shaft (1) to rotate the driven shaft (1). 4) and driven tooth (2)
A cover characterized by comprising a chevron (2A, 4A) having a pair of slopes (2a, 2b, 4a, 4b) and an axial groove (2B, 4B) continuous with the chevron (2A, 4A). Drive device for rotating shaft. 4. The driven device for a driven shaft according to claim 1, further comprising a sensor (20 or 21) for detecting a tip interference state of the driving tooth (4) and the driven tooth (2). ..