JPH0173560U - - Google Patents

Description

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a vertical cross-sectional view of main parts showing a preferred embodiment of the bidirectional speed switching clutch mechanism according to the present invention;
The figure is an exploded explanatory view of the main parts of Figure 1, and Figure 3 is a cross-section of Figure 1, which shows the action of the first drive system in which the driving force is transmitted from the first drive shaft to the driven shaft. Figure 4 is the same as Figure 3, but Figure 5 is a cross-sectional view explaining the action of the second drive system in which driving force is transmitted from the second drive outer wheel to the driven shaft, and Figure 5 is the same as Figure 3. FIG. 6 is a cross-sectional view showing the action of the first drive system in the same but opposite direction, and FIG. 6 is an enlarged view of the switching cam showing the characteristic outer peripheral surface of the present invention. 10... Housing, 12... Driven shaft, 14
...Second drive outer wheel, 16...First drive shaft, 22...
...Switching cam, 24...Receiving surface, 26...Transmission pin, 28...Cam surface, 30...Transmission cam wheel, 32...
...Retainer claw, 34...Transmission pin, 35...Roller, 36...Retainer, 38...Roller groove.

Claims (1)

[Claims for Utility Model Registration] In a bidirectional speed switching clutch mechanism that transmits the driving force of either the high speed side of a first drive shaft or a second drive outer wheel having different rotation speeds to a driven shaft regardless of the rotation direction, The first drive shaft is provided with a transmission cam wheel that rotates integrally therewith, and the driven shaft is provided with a switching cam that rotates in conjunction with the transmission cam wheel, and the second drive outer wheel and the switching cam are connected to each other. A plurality of rollers arranged around the outer periphery of the switching cam are inserted at predetermined intervals by a retainer between the rollers, the retainer makes weak contact with the second driving outer ring, and the switching cam has a generally triangular rice ball shape. An arcuate receiving surface is formed on the outer periphery of each apex of the switching cam, and an arcuate receiving surface is formed on the outer periphery of each vertex to be bearing on the inner periphery of the retainer, and on the side periphery of the switching cam, a roller is connected to the second driving outer ring in correspondence with each roller. A separate transmission pin is press-fitted into the end face of the cam surface to play with or clamp between the cam wheels, and a separate transmission pin that plays with the transmission cam wheel with a predetermined play in the rotational direction is press-fitted into the retainer. a roller groove that positions the roller at a predetermined position; and a cam groove that holds the retainer itself in a position where the roller is brought into play between the switching cam and the second drive outer ring by rotation of the first drive shaft. The transmission cam wheel is provided with a transmission groove for receiving the transmission pin of the switching cam, and a retainer pawl that engages with the cam groove of the retainer to release the retainer and roller to a predetermined position, and the switching cam The cam surface has a symmetrical shape with respect to its center normal, and when the first drive shaft rotates at a higher speed than the second drive outer wheel, the transmission cam wheel rotates in the retainer in any direction of rotation. The rotation of the first drive shaft is transmitted to the driven shaft while holding the roller in the loose state between the switching cam and the second drive outer ring through the cam, and the second drive outer ring rotates at a higher speed than the first drive shaft. When switching, the second driving outer wheel moves the retainer and roller ahead of the transmission cam wheel in any direction, and the roller is sandwiched between the second driving outer wheel and the switching cam, and the second driving outer wheel is driven. A bidirectional speed switching clutch mechanism characterized in that force is transmitted to the driven shaft.