JPH0590007U - Power transmission device - Google Patents

Abstract

(57) [Abstract] [Purpose] A power transmission device capable of improving the power transmission performance and noise and vibration characteristics without the rotational torque of the drive gear being transmitted from the first idler gear to the second idler gear. provide. [Structure] A pair of left and right connecting members 17a, 17 for connecting a first idler gear 13A and a second idler gear 13B.
b is the center of rotation of the idler gear 13A and the idler gear 13
It is provided so as to be slidable in a straight line connecting the center of rotation of B, and the connecting member 17a,
17b is slid to separate one of the first idler gear 13A and the second idler gear 13B from the drive gear 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a power transmission device for transmitting rotation of a drive shaft to a driven shaft.

[0002]

[Prior Art]

 Conventionally, a power transmission device as shown in FIGS. 7 and 8 has been known as a means for transmitting the driving force of a drive shaft to a driven shaft. 7 and 8, 1 is a drive shaft, 2 is a drive gear attached to the drive shaft 1, and an idler gear 3A and an idler gear 3B mesh with the drive gear 1.

These idler gears 3 A, 3 B transmit the rotation of the drive gear 2 to a driven gear 4 provided on a driven shaft 5, and are held by a gear case 7 via bearings 6 ... ..

[0004]

[Problems to be solved by the device]

 By the way, in such a conventional power transmission device, since the idler gears 3A and 3B are supported by the gear case 7 through the bearings 6 ..., Power circulation phenomenon does not occur, and the power transmission performance and noise vibration characteristics are reduced. There was a problem of lowering.

The present invention has been made in view of the above problems, and its purpose is to prevent the rotational torque of the drive gear from being transmitted from the first idler gear to the second idler gear, and to improve the power transmission performance. And to provide a power transmission device capable of improving noise and vibration characteristics.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a drive gear, a driven gear driven by the drive gear, a gear case for accommodating the drive gear and the driven gear, and the drive gear housed in the gear case. A first idler gear that transmits the rotation of the driven gear to the driven gear, and a straight line that connects the rotation center of the driving gear and the rotation center of the driven gear, and is disposed on the side facing the first idler gear. And a second idler gear, which is slidable in a straight line connecting the center of rotation of the second idler gear and the center of rotation of the first idler gear, and connects the first idler gear with the second idler gear. And a connecting member for

[0007]

[Action]

 According to the above configuration, when the drive gear rotates, one of the first idler gear and the second idler gear moves in a direction away from the drive gear and the driven gear, and one of the power transmission paths is cut off. It is possible to prevent the power circulation phenomenon.

[0008]

【Example】

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

In FIGS. 1 to 5, 11 is a drive shaft, 12 is a drive gear attached to the drive shaft 11, and an idler gear 13 A and an idler gear 13 B mesh with the drive gear 11.

These idler gears 13A, 13B transmit the rotation of the drive gear 12 to a driven gear 14 provided on a driven shaft 15, and each of a pair of left and right connecting members 17a, 17b via a bearing 16 ... Supported by. These connecting members 17a and 17b connect the idler gears 13A and 13B and are housed in the gear case 18.

The gear case 18 accommodates the drive gear 11, the idler gears 13A and 13B, and the driven gear 14. The inner surface of the gear case 18 includes the connecting members 17a and 17b, which are the center of rotation of the idler gear 13A and the idler gear 13B. Guide grooves 19a and 19b are formed so as to be slidably supported in a linear direction connecting the center of rotation of the.

In one embodiment of the present invention configured as described above, for example, when the drive gear 12 rotates clockwise as shown in FIG. 6A, the connecting members 17a and 17b slide to the right in the drawing. .. When the connecting members 17a and 17b slide to the right in the figure, the idler gear 13A meshes with the drive gear 12, and the rotation of the drive gear 12 is thereby transmitted to the driven gear 14 via the idler gear 13A. At this time, the idler gear 13B is separated from the drive gear 12 and the driven gear 14 as shown in FIG. 6 (a), and the idler gear 13B is disengaged from the drive gear 12 and the driven gear 14. Therefore, the rotation of the driven gear 14 is not transmitted to the idler gear 13B.

When the drive gear 12 rotates counterclockwise as shown in FIG. 6B, the connecting members 17a and 17b slide to the left side in the figure. When the connecting members 17a, 17b slide to the left side in the drawing, the idler gear 13B meshes with the drive gear 12, and the rotation of the drive gear 12 is transmitted to the driven gear 14 via the idler gear 13B. At this time, the idler gear 13A is separated from the drive gear 12 and the driven gear 14 as shown in FIG. 6 (b), and the idler gear 13A and the drive gear 12 and the driven gear 14 are disengaged from each other. The rotation of the drive gear 14 is not transmitted to the idler gear 13A.

As described above, in this embodiment, the pair of left and right connecting members 17a and 17b connecting the first idler gear 13A and the second idler gear 13B are connected to each other with the rotation center of the idler gear 13A and the rotation center of the idler gear 13B. Since it is slidable in the connected straight line direction, one of the idler gears 13A or 13B can be separated from the drive gear 12 and the driven gear 14 when the drive gear 12 rotates. Therefore, unlike the conventional case, the rotation torque of the drive gear 12 does not circulate, and the rotation torque of the drive gear 12 can be reliably transmitted to the driven gear 14, thus improving the power transmission performance. You can The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

[0015]

[Effect of the device]

 As described above, the present invention provides a drive gear, a driven gear driven by the drive gear, a gear case that accommodates the drive gear and the driven gear, and a rotation of the drive gear that is housed in the gear case. A first idler gear for transmitting the power to the driven gear, and a straight line connecting the center of rotation of the drive gear and the center of rotation of the driven gear, and a first idler gear disposed on the side facing the first idler gear. A second idler gear, and a connection that connects the first idler gear and the second idler gear to each other so as to be slidable in a straight line connecting the rotation center of the second idler gear and the rotation center of the first idler gear. And a member.

Therefore, it is possible to provide the power transmission device capable of improving the power transmission performance and the noise vibration characteristic without the rotational torque of the drive gear being transmitted from the first idler gear to the second idler gear.

[Brief description of drawings]

FIG. 1 is a sectional view of a power transmission device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a cross-sectional view taken along the line CC of FIG.

5 is a cross-sectional view taken along the line DD of FIG.

FIG. 6 is an operation explanatory view of a power transmission device according to an embodiment of the present invention.

FIG. 7 is a sectional view showing an example of a conventional power transmission device.

8 is a cross-sectional view taken along the line EE of FIG.

[Explanation of symbols]

11 ... Drive shaft, 12 ... Drive gear, 13A, 13B
... idler gear, 14 ... driven gear, 15 ... driven shaft, 16 ... bearing, 17a, 17b ... connecting member, 18 ...
Gear case, 19a, 19b ... Guide groove.

Claims (1)

[Scope of utility model registration request] 1. A drive gear, a driven gear driven by the drive gear, a gear case for accommodating the drive gear and the driven gear, and a rotation of the drive gear accommodated in the gear case for the driven gear. A first idler gear transmitted to the first idler gear, and a second idler gear arranged on a side facing the first idler gear with a straight line connecting the rotation center of the driving gear and the rotation center of the driven gear interposed therebetween. And a connecting member that is slidable in a straight line connecting the center of rotation of the second idler gear and the center of rotation of the first idler gear and that connects the first idler gear and the second idler gear. Power transmission device characterized by.