JPH0143540Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a clutch device.

2. Description of the Related Art Conventionally, there is a clutch device shown in FIG. 4, which disconnects and connects power transmission between a power transmission shaft and a power transmission body. That is, the power transmission shaft 1 and the sprocket 2, which is a power transmission body, are arranged on the same axis. A slide gear 3 is slidably spline-fitted onto the power transmission shaft 1, and the sprocket 2 is formed with internal teeth 4 with which the slide gear 3 engages in a detachable manner. The slide gear 3 is inside the case 5 that houses the sprocket 2, etc.
A spring 6 is housed therein, and a shifter 7 is provided to slide the slide gear 3 meshing with the internal teeth 4 in a direction to release the mesh.

Problems to be Solved by the Invention The conventional clutch device shown in FIG. 4 requires a spring 6 and a shifter 7, and requires a large space to install these parts. Further, the structure of the shifter 7 is complicated, and it takes time and effort to assemble the shifter 7, the spring 6, etc.

This invention has been made in view of the above points, and the object is to provide a clutch device that can reduce the number of parts, has a simple structure, and can be easily installed in a narrow space.

Means for Solving the Problem An engaging body 9 is provided which rotates integrally with the power transmission shaft 8 and is slidable along the axial direction of the power transmission shaft 8, and is arranged on the same axis as the power transmission shaft 8. A power transmission body 11 is rotatably provided, and has an engaging portion 12 that is positioned and removably engaged with the engaging body 9 . A plate spring-like arm 13 is provided at one end which is fixed and which engages the engaging body 9 and urges the engaging body 9 in a direction to engage the engaging portion 12. One end of a wire 16 is connected to the arm 13 for applying tension to slide the engaging body 9 in the direction of disengaging the engaging portion 12 .

Operation The engaging body 9 urged by the arm 13 engages with the engaging portion 12 to transmit power between the power transmitting shaft 8 and the power transmitting body 11. The tension applied through the wire 16 causes the engagement body 9 to slide in the direction of disengaging from the engagement portion 12, and the disengagement between the engagement body 9 and the engagement portion 12 causes the power transmission shaft 8 and the power to be transmitted. Power transmission with the body 11 is cut off.

Embodiment An embodiment of this invention will be described based on FIGS. 1 and 2. A slide gear 9, which is an engaging member, is spline-fitted to the power transmission shaft 8, which is rotatable around the shaft center, and is provided to be slidable in the axial direction of the power transmission shaft 8. A sprocket 11, which is a power transmission body housed in a case 10, is rotatably provided on the same axis as the power transmission shaft 8, and the slide gear 9 is engaged with the sprocket 11 in a removable manner. Internal teeth 12 are formed.

A plate spring-shaped arm 13 having one end fixed to the inner circumferential surface of the case 10 is provided inside the case 10 . This arm 13 engages with the groove 14 of the slide gear 9, and moves the slide gear 9 between the inner teeth 12.
It is biased in the direction of engagement. Furthermore, a pin 15 is fixed to the free end of the arm 13, and one end of a wire 16 is connected to this pin 15. Note that the other end of the wire 16 is connected to a clutch lever (not shown).

In such a configuration, when the clutch lever is operated to the position where power is transmitted, the wire 16 becomes loose, and the slide gear 9 engages the internal teeth 12 that have slid toward the sprocket 11 due to the biasing force of the arm 13. Fit. This meshing allows the power transmission shaft 8 and the sprocket 11 to rotate freely as a unit, and power is transmitted between the power transmission shaft 8 and the sprocket 11.

Next, when the clutch lever is operated to the position where power transmission is cut off, tension is applied to the wire 16, and this tension causes the slide gear 9 to slide in a direction away from the sprocket 11, causing it to mesh with the internal teeth 12. is canceled. And internal teeth 12
By disengaging the gear and the slide gear 9, the power transmission between the power transmission shaft 8 and the sprocket 11 is cut off.

When the clutch lever is returned to the power transmission position, no tension is applied to the wire 16.
The wire 16 becomes loose. Therefore, the slide gear 9 that has been slid by the biasing force of the arm 13 meshes with the internal teeth 12 and returns to the power transmission state again.

Here, the arm 13 and the wire 16 may be provided as parts for sliding the slide gear 9 and intermittent meshing with the internal teeth 12, thereby reducing the number of parts. Furthermore, it is structurally simple, requires no effort to assemble, and does not require a large space for installation. Furthermore, the mounting position of the clutch lever can be freely set, making it easy to operate.

FIG. 3 shows an example in which the clutch device of the present invention is installed in a power transmission mechanism for transmitting power from a mobile agricultural machine to a rotary working machine. A power transmission shaft 17 on the rotary work machine side is provided parallel to the power transmission shaft 8 that is connected to the engine of the mobile agricultural machine and rotates, and a sprocket 18 and a sprocket 11 are spline-fitted to the power transmission shaft 17. Chain 19 is wound. By operating a clutch lever provided near the handle of the mobile agricultural machine, the engagement between the slide gear 9 and the internal teeth 12 is intermittent and the transmission of power to the rotary working machine is intermittent.

Effects of the invention This invention as described above urges the engaging body, which rotates integrally with the power transmission shaft, with a leaf spring-like arm to engage the engaging portion of the power transmission body, and the wire connected to the arm. By sliding the engaging body and disengaging it from the engaging part by the tension applied through the shaft, the power transmission between the power transmission shaft and the power transmission body can be interrupted or interrupted with a small number of parts and a simple structure. Furthermore, the mechanism for cutting and discontinuing the power transmission can be incorporated into a narrow space, resulting in miniaturization and cost reduction.

[Brief explanation of the drawing]

FIG. 1 is a horizontal sectional view showing an embodiment of this invention, FIG. 2 is a side view thereof, FIG. 3 is a horizontal sectional view showing an applied example, and FIG. 4 is a horizontal sectional view showing a conventional example. 8...Power transmission shaft, 9...Slide gear (engaging body), 11...Sprocket (power transmission body), 12
...Inner tooth (engaging part), 13...Arm, 16...
wire.

Claims (1)

[Scope of utility model registration request] An engaging body is provided that rotates integrally with the power transmission shaft and is slidable along the axial direction of the power transmission shaft, and is located on the same axis as the power transmission shaft and allows the engaging body to freely engage and disengage. A leaf spring rotatably provided with a power transmission body having an engaging part to be engaged, one end of which is fixed, and which engages with the engaging body to urge the engaging body in a direction to engage with the engaging part. 1. A clutch device comprising: a shaped arm, and one end of a wire that applies tension to slide the engaging body in a direction to release the engaging portion from the engaging portion is connected to the arm.