JPS6111100Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a riding rice transplanter configured so that when the aircraft changes direction, the drive wheels on the side changing direction become idle, and return to the driving state when the aircraft returns to straight ahead. Concerning improvements to the side clutch cam of the aircraft.

Conventional technology This type of side clutch cam in the past is
A ring-shaped cam plate with a fan-shaped cutout on the periphery is installed on the levitation wheel of the levitation vehicle so that the end of the side clutch arm, which is connected to the side clutch lever of the drive wheel via a wire, can be slidably pressed into contact with the side clutch lever of the levitation wheel. It was provided with a flange-like overhang on the shaft.

Problems that the invention aims to solve Conventional side clutch cams are constructed as described above, so when the machine is turned by turning the rudder shaft, the tip of the one side clutch arm moves from the notch to the circumferential surface of the cam plate. Disengage the side clutch of the drive wheel on the side that is moving and turning to make it idle. Then, when the rake shaft is turned in the opposite direction, the machine straightens up, and the tip of the clutch arm that is on the circumferential surface of the cam plate moves into the notch through the edge of the notch, but the tip of the arm passes through the edge of the notch. However, the problem was that the engagement of the clutch was insufficient and the clutch tended to become half-clutched.

This invention was devised for the purpose of eliminating the above-mentioned drawbacks, and the aim was to provide a side clutch cam for a riding rice transplanter that would ensure that the side clutch would engage when the machine straightened after turning. be.

Means to Solve the Problem Namely, in this invention, a side clutch arm, which is connected to a side clutch lever of a driving wheel via a wire, is provided with a side clutch arm that extends in a flange shape on a skid shaft so that the tip thereof can be slidably pressed into contact with the side clutch lever of the drive wheel. In a side clutch cam in which a fan-shaped notch is provided on the peripheral edge of an annular cam plate, guide pieces provided at both ends of the notch are made to protrude inwardly from each other by biasing a spring. The gist of this invention is a structure of a side clutch cam for a riding rice transplanter, characterized in that it is rotatable and is provided with a stopper that allows the top of the guide piece to be stopped on an extension of the periphery of the cam plate. be.

Function Since this device is constructed as described above,
When the scooping shaft is turned in any direction, the guide piece provided on one edge of the notch comes into contact with the tip of the clutch arm located inside the notch, causing it to rotate outward. It rides over and is pushed up from the edge of the notch to the circumferential surface of the cam plate. When the tip of the clutch arm is pushed up onto the circumferential surface of the cam plate, the clutch lever is rotated via a wire, one side clutch is disengaged, and the rotating drive wheel becomes idle. On the other hand, when the tip of the arm moves to the cam plate circumference, the guide piece is released from the pressure, returns to its original state due to the bias of the spring, and is stopped by a stopper when its top is located on the extension line of the cam plate circumference. be done. Therefore, if you turn the scooping shaft in the opposite direction to the above, the tip of the clutch arm located on the circumferential surface of the cam plate will
It moves from the peripheral surface of the cam plate to the top of the guide piece, and finally falls vertically into the notch from the tip of the guide piece, and the side clutches are instantaneously engaged, so that the cam does not become half-clutched.

Embodiment To explain this invention with reference to an illustrated embodiment, reference numeral 1 denotes a body of a riding rice transplanter, which is supported by a levee wheel 2 and two left and right drive wheels 3, 3 so as to be freely movable.
Reference numeral 4 denotes a raking shaft, which supports the raking wheel 2 by means of a handle 5 so as to be swingable left and right. Reference numeral 6 denotes an annular cam plate, and a fan-shaped notch 7 is cut out on the periphery of the plate. The cam plate 6 is provided with a central shaft hole inserted into the scooping shaft 4, and a peripheral edge thereof protruding like a flange. Reference numeral 8 denotes a guide piece, which is rotatably supported by a support shaft 9 provided close to both ends of the notch 7, and is supported by a spring 10 so as to be rotatable inward of the notch 7. Forced. Reference numeral 11 denotes a stopper, which is provided so as to stop the guide piece 8 when the top side 12 is located on the extension line of the periphery of the cam plate 6. Reference numeral 13 denotes a support shaft on which two side clutch arms 14, 14 are rotatably supported. The ends of the side clutch arms 14, 14 are provided with rollers 15, 15 for slidably pressing against the cam plate 6 of the raking shaft 4. Moreover, the side clutch arms 14, 14 are
It is connected to side clutch levers 18, 18 of the transmission case 17 via wires 16, 16. As the side clutch arm 14 rotates, the clutch lever 18 moves toward the transmission case 1.
The engaging clutch in 7 can be freely engaged or disengaged.

To explain the operation of the above embodiment, when the handle 5 is turned to turn the machine body 1, the scooping wheel 2 and the cam plate 6 rotate together with the scooping shaft 4. However, the clutch arm 1 is located on the periphery of this cam plate 6.
Since the rollers 15, 15 at the tips of 4, 14 are slidably pressed against each other, the clutch arm 14 is attached to the cam plate 6.
The support shaft 13 rotates around the support shaft 13 along the circumferential edge of the support shaft 13. When the clutch arm 14 rotates, the clutch lever 18 rotates via the wire 16, and the dog clutch in the transmission case 17 is engaged or disconnected.

This will be explained in detail with reference to the operation diagrams shown in FIGS. 5 to 8. In FIG. It shows that it is in a state. Figure 6 shows how to turn aircraft 1 to the left.
The case is shown in which the cam plate 6 is rotated counterclockwise together with the scooping shaft 4, and the one-side guide piece 8 is pressed against the roller 15 at the tip of the one-side arm 14 and rotates, and the roller 15
is pushed up above the one side end b of the notch 7, and the one side side clutch is broken. Figure 7 shows the cam plate 6
, the roller 15 at the tip of the clutch arm 14 has moved to the circumferential surface of the cam plate 6, and the guide piece 8 is released from the pressure of the arm 14.
It is restored to its old state by the bias of the spring 10.
Figure 8 shows the case where the rake shaft 4 is rotated clockwise in order to straighten the aircraft 1, and the roller 1 at the tip of the arm 14 is rotated clockwise.
5 has moved to the top side 12 of the guide piece 8. If the cam plate 6 is further rotated clockwise from this state, the arm 1
4 drops directly from the tip of the guide piece 8 to the bottom side a of the notch 7 without receiving any resistance, so that the side clutches in the transmission case 17 are instantly and reliably engaged. Become.

Effects According to the present invention, as the machine turns, the drive wheel on that side becomes idle, and when the machine returns to straight ahead, the drive wheel starts driving. This has the practical benefit of allowing the dog clutch of the drive wheel to be brought into mesh extremely reliably just by operating the handle.

[Brief explanation of the drawing]

Figure 1 is a side view of a riding rice transplanter equipped with the present invention, Figure 2 is a mechanical diagram showing the relationship between the present invention and the clutch lever, Figure 3 is a plan view of the main parts, and Figure 4 is a side view thereof. 5 to 8 are a series of operation diagrams. The symbols in the figure are as follows. 1 is the fuselage, 2 is a skimmer, 3 is a drive wheel, 4 is a skim shaft, 5 is a handle, 6 is a cam plate, 7 is a notch, 8 is a guide piece, 9 is a spindle, 10 is a spring, 11 is a stopper , 12 is the top side, 13 is the support shaft, 14 is the side clutch arm, 15 is the roller, 16 is the wire, 1
7 is the transmission case, 18 is the side clutch lever.

Claims (1)

[Scope of utility model registration request] A fan-shaped cam plate is attached to the periphery of an annular cam plate that extends from the raking shaft in a flange-like manner so that the tip of the side clutch arm, which is connected to the side clutch lever of the drive wheel via a wire, can be slidably pressed into contact with the side clutch lever of the drive wheel. In a side clutch cam provided with a notch, the guide pieces provided at both ends of the notch are rotatable so as to project inwardly from each other under the bias of a spring, and the tops of the guide pieces A side clutch cam for a riding rice transplanter, characterized in that a stopper is provided to freely stop the side on an extension of the periphery of the cam plate.