JPH06129450A - Torque transfer unit - Google Patents

Abstract

PURPOSE:To transfer the extent of torque without decelerating the torque from the input side alone. CONSTITUTION:A nearly cylindrical input shaft 4 having a notch part 41a in its peripheral wall is rotatably installed in and around a fixed shaft 2. An output ring 5 with two reverse inclined walls 51, 52 formed so as to have a specified clearance between end walls 51a, 52a and respective notched end faces 41b, 41c of an input shaft peripheral wall, as being projected inward in proportion as heading for these notched end faces 41b, 41c of the input shaft peripheral wall formed in a peripheral wall inner surface adjoing the notch part 41a of the input shaft 4, is installed in and around the input shaft 4. In succession, six roller members 6 to be energized in direction of the end walls 51a, 52a of these inclined walls 51, 52 via a spring member 6 are installed inspace between these inclined walls 51, 52 of the output ring 5 and a circumferential surface of the fixed shaft 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque transmission unit used by being arranged in a torque transmission path in various machines and equipment, and more particularly to a torque transmission unit capable of transmitting torque only from an input side. .

[0002]

2. Description of the Related Art As a torque transmission unit of this type,
For example, a worm gear that can obtain a large reduction in speed with a relatively small device is known, and is widely used for opening and closing a window glass of an automobile. That is, a worm is connected to a handle for opening and closing the window glass, and a worm wheel is connected to an elevating shaft of the window glass so that the window glass is moved up and down only when the handle is rotated.

[0003]

However, since such a conventional torque transmission unit uses the speed ratio between the worm and the worm wheel, the torque transmission from the output side, that is, the worm wheel side can be prevented. In the case of the worm, that is, the window glass of the automobile, in order to transmit the torque from the handle side, the worm wheel (output side) cannot be driven unless the worm (input side) is rotated a considerable number of times. was there.

The present invention has been made in order to solve the above-mentioned problems, and while torque cannot be transmitted from the output side, torque from the input side can be transmitted to the output side without decelerating. Regarding the transmission unit.

[0005]

In order to achieve the above object, a torque transmission unit according to the present invention is formed in a substantially cylindrical shape, and a notch is formed in a peripheral wall thereof so as to rotate around a fixed shaft. An input shaft that is movably disposed and a substantially cylindrical shape that can be rotatably disposed around the input shaft, and the inner wall of the peripheral wall facing the cutout portion of the input shaft. Formed so as to project inward toward each cutout end surface of the input shaft peripheral wall formed by sandwiching the cutout portion, and to have a predetermined gap between the end wall and each cutout end surface of the input shaft peripheral wall. And an output ring having an inclined wall with a reverse inclination, and arranged in the notch of the input shaft between each inclined wall of the output ring and the peripheral surface of the fixed shaft. A plurality of roller members that are urged to engage with the fixed shaft and the output ring, Is disposed between the roller members, and biases each roller member toward the end wall of each inclined wall, and in a normal state, a part of each roller member is placed on the input shaft peripheral wall from the line connecting the center of the input shaft and the end wall. And a spring member projecting in the direction of each cutout end face.

[0006]

When the input shaft is driven to rotate in either the forward or reverse direction, only the input shaft rotates until it comes into contact with the end wall of the output ring inclined wall. Immediately before coming into contact with the end wall of the inclined wall, the roller member of the plurality of roller members, which is on the front side in the rotation direction, is contacted and the roller member is pressed in the direction opposite to the urging direction of the spring member. As a result, the engagement between the fixed shaft and the output ring is released. When the notched end surface of the input shaft contacts the end wall of the inclined wall, the output ring starts rotating together with the input shaft. The output ring rotates with respect to the other roller member in a direction in which the other roller member escapes from the end wall of the inclined wall. Therefore, the torque of the input shaft is transmitted to the output ring without deceleration.

When the output ring is rotationally driven, the end wall of the inclined wall rotates in a direction approaching the roller member located in the rear of the rotational direction in both forward and reverse directions.
Engage with a fixed shaft. Therefore, the torque from the output ring is not transmitted to the input shaft.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A torque transmission unit according to the present invention will be described below in more detail with reference to the embodiments shown in the drawings. In the figure, 1 is a torque transmission unit of the present embodiment,
It comprises a fixed shaft 2, an input shaft 4, an output ring 5, a roller member 6, and a spring member 7.

The fixed shaft 2 has a thick body portion 2a and a thin fixed head portion 2b protruding from one end of the body portion 2a.
2, the other end of the body 2b is fitted and fixed to the fixed plate 3 which can be fixed to an arbitrary immovable portion, as shown in FIG.

The input shaft 4 is formed in a substantially cylindrical shape and is rotatably fitted around the fixed shaft 2.
Specifically, as shown in FIGS. 1 and 2, the fixed shaft 2 is formed around a body 2a of the fixed shaft 2 and has a predetermined width in the circumferential direction and a predetermined width. A peripheral wall portion 41 having a plurality of cutout portions 41a formed along the direction.
And an input head portion 42 located around the fixed head portion 2b of the fixed shaft 2. Note that 43
Is a screw hole 42a provided substantially in the center of the input head 42.
It is a retaining screw that is screwed into.

The output ring 5 is formed in a substantially cylindrical shape and is rotatably disposed around the input shaft 4, specifically, around the peripheral wall portion 41. Further, in the output ring 5, a pair of inclined walls 51 and 52 are formed on the inner surface of the peripheral wall facing the notches 41a of the input shaft 4 so as to be formed in the respective notches 41a so as to be reversely inclined. . That is, the sloped walls 51 and 52 move from the position facing the substantially central portion of the cutout portion 41a toward both sides, that is, toward the cutout end surfaces 41b and 41c of the peripheral wall portion 41 forming the cutout portion 41a of the input shaft 4. The end walls 51a, 52a gradually inwardly project, and the end walls 51a, 52a project inward most, so that the end walls 51a, 52a are reversely inclined. Further, the formation positions of the end walls 51a and 52a are such that when the output ring 5 is mounted around the input shaft 4, a predetermined gap is formed between the cutout end faces 41b and 41c of the input shaft 4. Is formed in.

The roller member 6 is located in each of the notches 41a of the input shaft 4 and has the inclined walls 51 and 52 of the output ring 5.
And the peripheral surface of the fixed shaft 2. The diameter of the roller member 6 is formed so as to be slightly larger than the distance between the tops of the inclined wall end walls 51a and 52a of the output ring 5 and the peripheral surface of the fixed shaft 2. Further, between the two roller members 6 and 6 disposed adjacent to each other in each of the cutout portions 41a, the roller members 6 and 6 are arranged in the direction of the end walls 51a and 52a of the inclined walls 51 and 52. And push a part of each roller member 6, 6 to the center P of the input shaft 3 in the normal state.
And the end walls 51a and 52a, the spring member 7 that projects in the direction of the cutout end faces 41b and 41c of the input shaft 4 from the line connecting the end walls 51a and 52a.
Is provided. As the spring member 7, as shown in FIGS. 1 and 3, a leaf spring may be bent into a substantially S-shape, and both end portions may be brought into contact with the roller members 6 and 6. Alternatively, the roller members 6 and 6 may be formed. A plurality of coil springs may be arranged between them.

Next, the operation of the torque transmission unit 1 according to this embodiment will be described. First, the input head section 4 of the input shaft 4
If 2 is applied to an input side member, for example, an automobile window glass, it is connected to an opening / closing handle, and the output ring 5 is connected to an output side member, for example, an elevator shaft for window glass of an automobile.

When the opening / closing handle is rotated, the input shaft 4 is rotated accordingly. For example, when the input shaft 4 rotates in the direction of arrow X in FIG. 1, each notched end surface 4 of the input shaft 4
1b comes into contact with the roller member 6 on the front side in the rotation direction. Then, of the two inclined walls, the end wall of the inclined wall 51 located forward of the input shaft 4 in the rotational direction is pressed while pressing the roller member 6 forward of the rotational direction against the elastic force of the spring member 7. It rotates independently until it contacts 51a. Here, the notch end surface 41
When b comes into contact with and presses the roller member 6 at the front in the rotation direction, the roller member 6 is separated from the end wall 51a of the inclined wall 51 and is formed by the inner surface of the inclined wall 51 and the peripheral surface of the fixed shaft 2. The moving force is moved in the direction in which the gap formed is increased, so that the engagement force of the roller member 6 with respect to the fixed shaft 2 is released.

In the input shaft 4, the notched end surface 41b has an inclined wall 5
After contacting the first end wall 51a, the end wall 51a is pressed to rotate the output ring 5. Where the output ring 5
The rotation force of the other roller member 6, that is, the roller member 6 located at the rear of the rotation direction and engaged with the end wall 52a of the other inclined wall 52 is released from the engaging force. Direction. Therefore, the rotational force of the input shaft 4 is transmitted to the output ring 5 without decelerating.

On the contrary, even when the input shaft 4 is rotated in the Y direction, the output ring 5 is rotated in the Y direction without decelerating the rotational force of the input shaft 4.

On the other hand, when it is attempted to rotate the output ring 5 in the X direction or the Y direction, the roller member 6 positioned rearward with respect to the rotation direction of the output ring 5 in the X direction has the inclined wall 51. Engages between the end wall 51a and the peripheral surface of the fixed shaft 2, and in the Y direction, the roller member 6 engages between the end wall 52a of the inclined wall 52 and the peripheral surface of the fixed shaft 2. , And does not rotate in either forward or reverse directions, and torque is not transmitted to the input shaft 4.

[0018]

According to the torque transmission unit of the present invention, torque cannot be transmitted from the output ring, but the torque from the input shaft does not decelerate with respect to the output ring and has a speed ratio of about 1: 1. Can be transmitted. Therefore, unlike the conventional worm gear, there is no problem that the input side must be rotated a considerable number of times to drive the output side, and it can be applied to various torque transmission paths.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a torque transmission unit of the present invention.

FIG. 2 is a vertical sectional view showing an embodiment of a torque transmission unit of the present invention.

FIG. 3 is a perspective view showing a spring member used in the embodiment.

[Explanation of symbols]

 1 torque transmission unit 2 fixed shaft 3 fixed plate 4 input shaft 5 output ring 6 roller member 7 spring member

Claims (1)

[Claims] 1. An input shaft, which is formed in a substantially cylindrical shape, has a notch portion formed in a peripheral wall thereof, and is rotatably disposed around a fixed shaft, and is rotatable around the input shaft. It is formed in a substantially cylindrical shape so that it can be disposed on the inner surface of the peripheral wall facing the cutout portion of the input shaft, and on each cutout end surface of the input shaft peripheral wall formed by sandwiching the cutout portion. An output ring having an inclining inclined wall formed so as to have a predetermined gap between the end wall and each notched end surface of the input shaft peripheral wall, and an inward notch of the input shaft. A plurality of rollers that are disposed between each inclined wall of the output ring and the peripheral surface of the fixed shaft and are normally urged toward the end wall of the inclined wall to engage with the fixed shaft and the output ring. Is disposed between the roller member and the adjacent roller member, and biases each roller member toward the end wall of each inclined wall, And a spring member projecting a part of each roller member in the direction of each notch end surface of the input shaft peripheral wall from a line connecting the center of the input shaft and the end wall. Torque transmission unit.