JPH0534345U - Power transmission device - Google Patents

Abstract

(57) [Summary] [Structure] An eccentric cam that is coupled to the driven body is provided to have a structure integrated with the tension pulley, and a belt is wound between the tension pulley and the motor pulley connected to the power source. To configure. [Effect] Since the tension pulley can be directly connected to the driven body, the tension of the belt can be easily adjusted. Further, since the tension bracket can be removed, the tension value does not fluctuate due to vibration in the front-rear direction or the left-right direction, and the belt tension can be stably maintained. Further, since the tension bracket, the adjusting screw and the tension spring are unnecessary, the structure is simplified.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a power transmission device for connecting a power source and a driven body by a belt to transmit the rotation of the power source to the driven body.

[0002]

[Prior Art]

 2A and 2B are views showing an example of a conventional power transmission device, FIG. 2A is a perspective view showing a configuration, and FIG. 2B is a front view showing a tension adjusting method.

A conventional power transmission device for connecting the power source and the driven body by a belt to transmit the rotation of the power source to the driven body is connected to a drive motor 14 as shown in FIG. The belt 13 is wound between the driving pulley 18 connected to the driven pulley (not shown) and the tension pulley 12 connected to the driven body (not shown), and the adjusting screw 15 is rotated (in the direction of arrow B). The tension bracket 11 holding 12 is moved in the left-right direction (direction of arrow A) to adjust the tension of the belt 13.

3A and 3B are views showing another example of a conventional power transmission device, FIG. 3A is a perspective view showing a configuration, and FIG. 3B is a front view showing a tension adjusting method.

Another example of a conventional power transmission device is, as shown in FIG. 3, a drive pulley 28 connected to a drive motor 24 and a tension pulley 22 connected to a driven body (not shown). A belt 23 is wound between them, and tension is applied to the tension bracket 21 by a tension spring 26, whereby the tension pulley 22 held by the tension bracket 21 is moved in the left-right direction (direction of arrow A) to move the belt 23. Is adjusting the tension.

[0006]

In the conventional power transmission device as described above, in the case of the example of FIG. 2, the tension of the belt is adjusted by moving the position of the tension bracket, so that the tension bracket is used. However, there is a drawback in that it is not possible to fix it at the same time and the adjustment with the adjusting screw is troublesome.

Further, in the case of the example of FIG. 3, the tension bracket cannot be fixed as in the case of the example of FIG. 2, and in order to keep the belt tension constant, a different value is required. There is a drawback that it is necessary to prepare many tension springs having different tension values.

In any case, the tension bracket vibrates in the front / rear direction or left / right depending on the magnitude of the load on the driven body, so that there is a problem in that the range of tension values to be adjusted becomes wide. There is.

[0009]

[Means for Solving the Problems]

 The power transmission device of the present invention comprises a belt for connecting a power source and a driven body, a tension pulley for winding the belt, and the tension pulley, which is integrated with the driven body. And an eccentric cam.

[0010]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a view showing an embodiment of the present invention, (a) is a plan view and (b) is a front view.

In FIG. 1, a belt 3 is wound between a motor pulley 4 connected to a motor 5 as a driving source and a tension pulley 1 connected to a driven body (not shown). ing. An eccentric cam 2 is integrally connected to the tension pulley 1, and the eccentric cam 2 is connected to a base 6 of a driven body.

In the power transmission device configured as described above, the space between the motor pulley 4 and the tension pulley 1 can be changed by rotating the tension pulley 1 about the eccentric cam 2. Therefore, the tension of the belt 3 can be adjusted.

With this configuration, the tension pulley 1 can be directly connected to the base 6 of the driven body, so that the tension of the belt 3 can be easily adjusted. Further, since the tension bracket can be removed, the tension value of the belt 3 does not fluctuate due to vibration before, after, or left and right, so that the tension of the belt 3 is stably held. Furthermore, the structure is simplified because tension brackets, adjustment screws and tension springs are not required.

[0015]

[Effect of the device]

 As described above, the power transmission device of the present invention is provided with the eccentric cam that is connected to the driven body and has the structure integrated with the tension pulley, and the tension pulley and the motor pulley that is connected to the power source are Since the tension pulley can be directly connected to the driven body by arranging the belt between the belts, the tension of the belt can be easily adjusted. Also, because the tension bracket can be deleted, the tension value does not fluctuate due to vibration in the front-rear direction or the left-right direction, and there is an effect that the tension of the belt can be stably maintained. Further, since the tension bracket, the adjusting screw, and the tension spring are unnecessary, there is an effect that the structure is simplified.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, in which (a) is a plan view and (b) is a front view.

FIG. 2 is a diagram showing an example of a conventional power transmission device, (a)
Is a perspective view showing a configuration, and FIG. 6B is a front view showing a tension adjusting method.

FIG. 3 is a diagram showing another example of a conventional power transmission device,
(A) is a perspective view showing a configuration and (b) is a front view showing a tension adjusting method.

[Explanation of symbols]

 1 Tension Pulley 2 Eccentric Cam 3 Belt 4 Motor Pulley 5 Motor 6 Base 11 Tension Bracket 12 Tension Pulley 13 Belt 14 Drive Motor 15 Adjusting Screw 18 Drive Pulley 21 Tension Bracket 22 Tension Pulley 23 Belt 24 Drive Motor 26 Tension Spring 28 Drive Pulley

Claims (2)

[Scope of utility model registration request] 1. A belt for connecting a power source and a driven body, a tension pulley for winding the belt, and an eccentric cam integrated with the tension pulley and coupled to the driven body. A power transmission device comprising. 2. A belt connecting a power source and a driven body, a tension pulley and a motor pulley for winding the belt, and an eccentric cam integrated with the tension pulley and coupled to the driven body. A power transmission device comprising: