JPS6312154Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a belt tension clutch mechanism for a lightweight and simple winch (hereinafter referred to as a radio-controlled winch) with an automatic control device for thinning and collecting timber in the forestry business.

Since thinning work is part of the afforestation process, it requires the most energy conservation, and therefore requires a winch that is easy to operate and is functional. Therefore, this invention can be easily operated by remote control or manual control,
Furthermore, a belt tension clutch mechanism has been developed that allows the wire wound around the winding drum to be easily rewound manually.

To explain the configuration based on an embodiment, a V-pulley 1 that is locked to an engine output shaft is rotatably engaged with a winding drum shaft 3 (first reduction shaft 3') via a V-belt 2. The power is transmitted to V pulley 4, and the V pulley 5 integrated with V pulley 4
The deceleration is transmitted via the belt 6 to the V-pulley 8 which is engaged with the second reduction shaft 7, and the chain 1 is decelerated by the sprocket 9 which is engaged with the other end of the second reduction shaft 7
0, the winding drum 12 is driven by further decelerating the power and transmitting the power to a sprocket 11 which is integrally engaged with the winding drum shaft 3, which is the final shaft. The one shown in Figure 1 is the tension pulley 1.
3 is a side view of the radio-controlled winch in a state where the clutch mechanism is opened.
When the large gear 15 is rotated in the direction of the arrow by operating the servo motor 14 from the position of the tension pulley 13 shown in the figure, the rod 16 moves to the left, but at this time a double nut is attached to the threaded shaft at the tip of the rod 16. The rear end of the rod guide 18 is pressed via the spring 17 by the set pressure of the spring 17, which is locked to the shaft by the spring 17, and the forked arm 19 is rotated counterclockwise, and the tension pulley 13 is moved to V with a predetermined pressing force.
The belt 16 is pressed against the belt 16 to apply a required tension to transmit power from the first reduction shaft 3' to the second reduction shaft 7. Next, in the state shown in Fig. 3, manually move the operating lever 20 to the left to remove the tension pulley 1.
3 is pressed against the V-belt 6 with an appropriate pressing force for transmission, the two-pronged arm 19 similarly rotates counterclockwise, but at this time the rod guide 18 and the arm 21 are joined so as to be swingable, and rod 16
Since the large gear 15 and the large gear 15 are rotatably joined by a pin 22, the rod guide 18 guides the rod 16 and swings the rod 16 upward around the pin 22, thereby applying a rotational force that is impossible for the large gear 15. is no longer being transmitted. The tension is released by being pulled back by a spring 24 whose one end is fixed to the arm 21 and the other end to the winch frame 23.
Next, the cover b fixed to the boss rotatably engaged on the first reduction shaft 3' and the second reduction shaft 7 is connected to the inner circumferential surface 25 of the cover and the V pulley 8 at the second reduction shaft 7. Since the cover is installed with a predetermined gap δ between the outer diameters 26 of the cover, when the tension is released, as shown in the partial cross section, the elasticity of the V-belt 6 causes the outer circumference of the V-belt 6 to touch the inner circumferential surface of the cover. 25 and is completely free to separate from the V-pulley 8. Therefore, when manually rewinding the wire wound around the winding drum 12, the power transmission system is cut off at the second reduction shaft 7. So you can easily rewind it. With a conventional simple cover, there was no care given to the gap δ, so the upper V-belt came into contact with the V-pulley due to its own weight, increasing the speed when rewinding the wire, making it heavy and difficult to work with. . In addition, the two-pronged arm 19 and the winding drum shaft 3 (V
One end of a Bowden wire 28 is connected to the arm 27 which is integrated with the two-pronged arm 19 at an appropriate angle across the common support shaft of the pulleys 4 and 5.
Since the other end is connected to the speed increasing end of the prime mover rotation speed converter 29, when the two-pronged arm 19 rotates counterclockwise and tension is applied, the arm 2
7 also rotates counterclockwise and the Bowden wire 28
is pulled to the right, so the rotational speed of the prime mover increases, and is controlled so that a predetermined rotational speed is obtained at a specified tension position.

With the simple configuration as described above, automatic remote control and manual operation can be easily operated without any switching device, and furthermore, it can contribute to energy saving as a functional clutch mechanism that can be easily operated by human power by wire.

[Brief explanation of the drawing]

FIG. 1 is a side view of the radio-controlled winch when the tension is released, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an enlarged side view of the belt tension clutch mechanism according to this invention. In the figure, 1 is a V pulley, 2 is a V belt, 3 is a winding drum shaft, 4 is a V pulley, 5 is a V pulley, 6 is a V belt, 7 is a second reduction shaft, 8 is a V pulley, and 9 is a sprocket. , 10 is a chain, 11 is a sprocket, 12 is a winding drum, 13 is a tension pulley, 14 is a servo motor, 15 is a large gear, 16
is a rod, 17 is a spring, 18 is a rod guide, 19 is a two-pronged arm, 20 is an operating lever, 21
is an arm, 22 is a pin, 23 is a winch frame, 24 is a spring, 25 is an inner peripheral surface, 26 is an outer diameter, 27 is an arm, 28 is a Bowden wire, 2
9 is a prime mover rotation speed converter; a: link mechanism;
b: Cover.

Claims (1)

[Claims for Utility Model Registration] (1) In one of a pair of pulley shafts constituting the power transmission mechanism of a radio-controlled winch, a tension pulley is attached to one of the two-pronged arms rotatably engaged with the pulley shaft. At the same time, the manual operation lever is detachably engaged, and the other arm is engaged with the rod guide of the crank mechanism a, which transmits power in the direction in which the tension is applied, in a vertically swingable manner, and a spring for releasing the tension is connected. , Connect one end of a Bowden wire to an arm integrated with the forked arm at an appropriate angle across the forked arm and the pulley shaft, and connect the other end of the wire to the speed increasing end of the prime mover rotation speed converter. A belt tension clutch mechanism for a radio controlled winch, wherein a cover b is attached between the pair of pulley shafts. (2) From the center of rotation of the large gear where the crank mechanism a is driven by being appropriately decelerated by the servo motor,
A rod guide is slidably engaged with the rod, which is eccentrically eccentric by an appropriate amount and is swingably locked to the large gear, and a threaded shaft is formed at the other end of the rod, and a spring is attached to the rod. A belt tension clutch for a radio-controlled winch as set forth in claim (1) of the utility model registration claim, wherein one end is engaged with the rear end of a rod guide and the other end is engaged with a double nut so that the pressing force of a spring can be freely adjusted. mechanism. (3) Cover b is a V-pulley that is locked to a pair of pulley shafts, and when the tension is released, the outer circumferential surface of the V-belt that is stretched between the V-pulleys is guided by the inner circumferential surface of the cover and is removed from the groove of the V-pulley. A belt tension in a radio-controlled winch as set forth in claim (1) of the utility model registration, which is formed by arranging an appropriate amount of gap between the outer diameter of the pulley and the inner circumference of the cover so that the belt tension is maintained in a uniformly detached state. Clutch mechanism.