JPS5847573B2 - Red-crowned wolf-throat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device in which a clutch is installed in the power transmission path of a universal connection shaft for power transmission that connects the PTO shaft of a tractor and the input shaft of a working machine.

As is well known, when a rotary or other drive-type working machine is attached to the rear of a tractor, power transmission can be ensured by connecting the tractor's PTO shaft and the working machine's input shaft with a flexible connecting shaft. be done.

However, if the above-mentioned power transmission continues even when the work equipment is raised to turn the tractor, the rotating parts of the work equipment may endanger other workers, which is extremely dangerous. When the working machine is a seeding machine, there are problems such as wasteful feeding of seeds and the generation of noise due to the non-uniform movement of the universal joint.

An object of the present invention is to provide a device that disconnects power transmission when a working machine is elevated as described above.

Hereinafter, an example of the present invention will be described in detail with reference to the drawings. 1 is a rear PTO shaft protruding from the rear of the tractor, 2 is an input shaft of the working machine, and the motive force of the PTO shaft 1 is connected to the input shaft 2 by a freely connecting shaft 3. It is possible to communicate using

The flexible connecting shaft 3 is composed of a double inner and outer telescopic shaft 4 and 5 that are spline-coupled, and has flexible joints 6 and 7 at both ends thereof.

The universal joint 6 is constructed from a pair of yokes 8 and 9 and a cross shaft 10 that connects the yokes 8 and 9, and the other universal joint 7
It is composed of a pair of yokes 11.12 and a cross shaft 13 connecting the yokes 11.12.

The first driving side is connected to the rear PTO shaft 1 through a pin 14, and the driven side is connected to the input shaft 2 through a pin 15.

Reference numeral 16 denotes a clutch connected to the driving side, which includes a clutch pressure receiving plate 17 which is spline-coupled to the rear PTO shaft 1 and serves as a clutch driving disk, and a thrust bearing 19 which is fitted onto this cylindrical boss via a pusher 18. one clutch driven board 20 in which a A connecting rod 23 is provided at a predetermined interval in the circumferential direction between the driven discs 21 and 20, and a clutch spring 24 is wound around the rod 23, so that the clutch disc 22 is interposed between the clutch disc 22 and the pressure receiving plate 17. Forced in the direction of connection.

Reference numeral 25 denotes a button fixed through the spider shaft center of the universal joint 6, and its protrusion amount can be adjusted with a lock nut 26 and an adjustment nut 27, and a contact portion with the cross shaft 10 is also provided. To ensure lubrication of the cross shaft 10
Although not shown in the figure, an oil hole may be provided protrudingly and a grease nipple may be provided.

Reference numeral 28 denotes a sensing ring inserted into the axial center of the yoke 8 at a position corresponding to the pusher 25, and the position facing the pusher 25 is a concave cam surface 29.

30 is the sensing force of the sensing rond 28, which is the thrust bearing 3.
The bearing 31 is a protruding shaft received through the clutch pressure receiving plate 17 and can be lubricated through the grease nipple 32.

To explain the operation of the embodiment of the present invention configured as described above, in the illustrated state, the clutch 16 is in the connected position, so the motive force from the rear PTO shaft 1 is transmitted to the work machine input shaft 2 through the universal connection shaft 3. has been done.

From this illustrated position, for example, when the work equipment is elevated to turn the tractor, the joints 6 and 7 at both ends of the universal connecting shaft 3
will be considered accordingly.

Due to this change in angle, the pusher 25 moves to the sensing rod 28.
When the sensing rod 28 comes into contact with the cam surface 29 of You will be under pressure.

Furthermore, when the amount of angular displacement between the sensing iron 28 and the pusher 25 increases, the pusher 25 comes into contact with the cam surface 29 of the sensing iron 28, and since the pusher 25 is fixed in the axial direction, the yoke 8 resists the spring 24. is slid to the right in the figure, and this sliding force is greater than the clutch spring 24.
The clutch 16 is automatically disengaged and therefore
By appropriately setting the distance between the pusher 25 and the sensing rod 28 and the shape of the cam surface 29, the clutch 16 can be activated by the angular displacement when the working machine is raised above a certain level. Automatically disconnect
This will cut off the driving force from the TO axis 1.

In the present invention, a clutch driving disk is fitted onto a driving shaft, a yoke is formed on a clutch driven disk provided opposite to the clutch driving disk, and a clutch element ( A spring is provided to bias the clutch drive disc in the connecting direction, and a sensing rod that presses the clutch driving disc is fitted into the shaft center of the clutch driven disc so as to be slidable in the axial direction.
A pusher corresponding to the sensing rond is fixed to the spider axis of the yoke on the driven shaft side corresponding to the yoke, and a cam portion that connects and disconnects the clutch in response to the angular displacement of the universal joint is connected to the cam portion that connects and disconnects the clutch. This feature allows the power transmission to be automatically cut off when the work equipment is lifted up, such as when turning a tractor, and the work equipment will not run idly, thereby increasing safety. can be ensured,
There is an advantage that noise generation from the joint portion of the universal connecting shaft is eliminated, and its durability can be greatly improved, and the means for achieving this is extremely simple, making it easy to put it into practical use.

[Brief explanation of the drawing]

The drawing is a partially omitted sectional view showing an example of the present invention. 1... PTO shaft (driving shaft), 2... Input shaft (driven wheel), 3... Mountain connection shaft, 6, 7...
... Yamazai joint, 8, 9...6 yoke, 10
...6 cross shaft, 16...clutch,
24...Clutch spring, 25...Pusher, 28...Sensing rod.

Claims (1)

[Claims] 1. In a universally connected shaft that transmits motive power to a driven shaft via a universal joint, a clutch driving disk is fitted onto the driving shaft, a yoke is formed on the clutch driven disk provided opposite to the driving shaft, and the clutch driving disk A spring is provided that biases the clutch element provided between the clutch drive board and the clutch drive board in the connection direction, and a sensing rod that presses the clutch drive board is fitted into the shaft center of the clutch drive board so as to be slidable in the axial direction. , A pusher corresponding to the sensing rond is fixed to the yoke spider axis on the driven shaft side corresponding to the yoke, and the cam portion that connects and disconnects the clutch element in response to the angular displacement of the universal joint is connected to the cam portion that connects and disconnects the clutch element. An automatic power disconnection device for a universally connected shaft, characterized in that a power automatic disconnection device is formed in the section.