JPS5839212Y2 - Wheel vertical position adjustment device in rice transplanter - Google Patents

Description

[Detailed description of the invention] This invention allows a pair of left and right running wheels to be moved up and down while having different vertical positions, or to be moved up and down while remaining at the same height. The present invention relates to a wheel vertical position adjustment device for a rice transplanter that can be used for various purposes.

The wheel vertical position adjustment device as described above is
Strong f to move the sliding case along the front and back direction of the aircraft
l11 [A moving device is provided, a rotating arm is provided in the sliding case that can swing freely around the vertical axis, and a swinging position of the rotating arm is provided between the rotating arm and the sliding case. A fixing structure is provided by engagement between a pin and a hole for fixing the rotary arm, and the rotary arm is provided with a fixing structure by engagement with a pin and a hole, and further, a wheel transmission case is vertically installed at both ends of the rotary arm and at the base end of the rotary transmission case which is pivotally connected to the aircraft body so as to be able to swing vertically. The upper ends of the rotating rods are connected to each other via a connecting rod.

However, in this structure, the rotating arm is made of a rectangular tube made of cast metal, so it is heavy, and the fixing structure that fixes the swinging position of the rotating arm is attached to one end of the rotating arm. Since it is constructed by fixing another rotary seat plate with a plurality of holes drilled therein, there is a drawback that the addition of the rotary seat plate further increases the weight of the aircraft body.

The present invention aims to reduce the weight of the rotating arm and the rotating arm fixing structure without reducing the weight of the aircraft body.

The present invention & East The rotating arm that swings on the seesaw is composed of two plates connected at both ends with stepped bolts. It is characterized by having a plurality of pin engagement holes for fixing the position.

That is, by constructing the rotary arm that swings on the seesaw from two plates, the weight of the rotary arm can be reduced compared to a structure made of a rectangular tube as described in the invention of the prior application. And, by directly drilling holes for pin engagement in the two plates to fix the position of the rotating arm, multiple holes were drilled as described in the prior invention. Compared to the case where the rotating seat plate is fixed to the end of the rotating arm, the weight can be reduced due to the structure for fixing the rotating arm, and the overall wheel vertical position adjustment device is improved. This made it possible to reduce the weight of the aircraft, making it possible to reduce the weight of the aircraft.

Furthermore, in connecting the continuous stroke to the end of the rotating arm,
For stepped bolts that connect both ends of two plates.

A cylindrical member is fitted onto the outside, and the ends of the continuous bolts are pivotally connected to the cylindrical member via a horizontal axis.For example, a stepped bolt is used to connect both ends of two plates. A bolt for connecting and fixing is provided separately, a cylindrical member is fitted onto the bolt for connecting and fixing, and the end of the connecting rod is pivotally connected to this cylindrical member via a horizontal axis. Compared to the case where a separate bolt is not provided, the number of parts and weight can be reduced by eliminating the need for a separate bolt.

Hereinafter, an embodiment of the present invention will be explained based on the drawings. Fig. 1 shows a traveling type rice transplanter to which the present invention is applied. At the rear of the aircraft, it is equipped with a pair of left and right paddy wheels 6°6, a vertical position adjustment device 8 for the engine 1 and the wheels 6, 6, and a soil leveling float 9 that can move up and down and slide on the mud surface. A two-row type seedling planting device 12 is provided, which has a seedling platform 10 that can be reciprocated and tilted forward downward, and a pair of left and right seedling planting claws 11 and 11. It is configured to extend rearward and diagonally upward.

The wheel vertical position adjustment device 8 is pivotally supported so that it can only be rotated in a front-back position horizontal to the aircraft body, and has a screw shaft 15 as a forced drive device that can be manually rotated via a handle 14, and this screw shaft 15. a sliding case 16 that is screwed onto the shaft 15 and reciprocates in the axial direction as the screw shaft 15 rotates;
A rotating arm 11 is pivotally connected to the sliding case 16 as a seesaw set around the vertical axis, and one end of the rotating arm 17 is pivotally connected to both longitudinal ends of the rotating arm 17. , a rotating rod 19 erected at the rotating base end of the transmission case 18, 18, which connects the left and right wheels 6°6 with the other end.
19, and a device 20 for fixing the swinging movement of the rotating arm 1γ relative to the sliding case 16 in each of a plurality of postures. By changing the position of the rotating arm 17 in the axial direction by the moving case 16, the left and right wheels 6, 6 can be simultaneously changed in the same direction, and by changing the swinging posture of the rotating arm 17, the left and right wheels 6, 6 can be moved simultaneously. The configuration is such that the positions of the two parts can be changed in opposite directions.

The sliding case 16 has a female screw portion 2 that is screwed into the screw shaft 15.
1 and a pivot portion 22 through which the screw shaft 15 is inserted and which pivotally holds the rotating arm 1γ are connected by a suspension portion 23.

Two plate-like members 1, 1, which are placed facing each other at an appropriate distance in the vertical direction with the pivot portion 22 of the rotating arm 11Q person sliding case 16 used as a spacer, are attached at both longitudinal ends and At the pivot shaft part, step bolts 2, 2, nuts 2
4.24 and bolts 25 for connection and fixation.

Step bolts 2, 2, nets) 24.2 for connecting and fixing the two plate-like members 1, 1 at both ends at a constant interval.
A cylindrical member 5°5 whose length in the axial direction is slightly smaller than the shaft portion is rotatably fitted onto the shaft portion of the bolts 2, 2 of No. 4,
One end of the connecting rod 4, 4, which transmits the movement of the plate-like members 1, 1 to the left and right wheels 6, 6, respectively, is attached to the horizontal axis 4a to the cylindrical members 5, 5.
It is pivotally connected via.

Further, the swing fixing device 20 has an engaging pin 2 held on the pivot portion 22 of the sliding case 16 in a state that can be remotely controlled by a lever 26 attached to the operating handle 13.
7, three engagement holes formed at intervals around the swing axis in the lower plate member 1 via a long hole 28 formed in the upper plate member 1 and a hole 29 formed in the pivot joint 22. 30...
By selectively engaging with ..., the rotating arm IT can be moved into a posture in which one wheel 6 is positioned higher than the other wheel 6, a posture in which both axles 6, 6 are positioned at the same height, and one of the two axles 6, 6 is positioned at the same height. The configuration is such that one wheel 6 can be fixedly held in either one of the following positions: a position in which one wheel 6 is positioned lower than the other wheel 6.

[Brief explanation of the drawing]

The drawings show an embodiment of the wheel vertical position adjustment device for a rice transplanter according to the present invention, and FIG. 1 is a side view of the rice transplanter, FIG. 2 is an enlarged partially cutaway side view of the main parts, and FIG. FIG. 4 is an enlarged vertical sectional side view of the main part, FIG. 5 is an enlarged sectional view taken along line V-V in FIG. 3, and FIG.
The mouth is an operating diagram. 1...Plate member, 2...Step bolt,
4...Continuous rod, 4a...Horizontal axis, 5...
... Cylindrical member, 15 ... Spiral shaft, 16 ...
...Sliding case 18...Axle transmission case 1
9... Rotating rod, 27... Pin 30.
...hole.

Claims (1)

[Scope of utility model registration request] A forced drive device 15 for moving a sliding case 16 along the longitudinal direction of the aircraft body is provided, and the sliding case 16 is provided with a rotating arm 17 that can swing freely around the vertical axis. , this rotating arm 1γ and the sliding case 16
A pin 27 for fixing the swinging position of the rotating arm 1γ between the
A fixing structure is provided by engagement with the hole 30, and a rotation is provided upright at both ends of the rotary arm 110 and at the base end of the wheel transmission case 18, which is pivotally connected to the aircraft body so as to be able to swing vertically. In a wheel vertical position adjustment device for a rice transplanter in which the upper ends of movable rods 19 are connected via connecting rods 4, the rotating arm 17 swinging with the seesaw is connected to both ends with stepped bolts 2, 2. Consisting of two connected plates 1, 1, cylindrical members 5, 5 are fitted onto the stepped bolts 2, 2, and the ends of the connecting rods 4, 4 are attached to the cylindrical members 5°5. are pivotally mounted via horizontal shafts 4a, 4a, and furthermore, on one end side of the two plates 1, 1,
A wheel vertical position adjustment device for a rice transplanter, characterized in that a plurality of pin engagement holes 30 are bored for fixing the swinging position of a rotating arm made of two plates.