JPH0455446Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a wheel lifting mechanism for a walking rice transplanter.

(b) Conventional technology Conventionally, the wheels of a walk-behind rice transplanter cooperate with floats installed on the rice transplanter to maintain a constant ground height of the rice transplanter from the planting surface of the field, and In order to obtain forward driving force, it is necessary for the rice transplanter to roll on the tiller in the field while bearing part of its weight.For this purpose, the wheels are pivotally supported at the tip of a swing case that can swing up and down. The case is configured to be linked with a hydraulic cylinder, etc. installed on the machine body through an interlocking mechanism using a rod, and the cylinder is operated according to the depth and shallowness of the plowing platform to meet the above conditions. .

(c) Problems to be solved by the invention However, since the rod interposed between the hydraulic cylinder and the left and right swing cases is located on the outside of the aircraft, the rod comes into contact with the top of the ridge when traveling over the ridge. This has the disadvantage that the rod may be bent by contact with the rod, or the rod may be damaged by contact with an external obstacle.

(d) Means for solving the problem In this invention, the base ends of the left and right swing cases are rotatably attached to the left and right sides of the transmission section of the aircraft, respectively, and the left and right wheels are connected to the tips of the cases. In addition to being able to be raised and lowered freely, the base ends are fixed to the left and right sides of the transmission part at a higher position than the left and right swing axes, and the rear ends of the gate-shaped frames that extend rearward around the outside of the left and right wheels are respectively installed. In a rice transplanter that is equipped with outer left and right planting gear cases that have planting claws,
The left and right rods for interlocking the hydraulic cylinders for lifting and lowering the wheels disposed on the aircraft body and the left and right swing cases are located between the base ends of the left and right swing cases and the base end of the gate frame. The present invention provides a wheel lifting mechanism for a walking-type rice transplanter.

(E) Function/Effect According to this invention, since the left and right rods are located between the left and right swing shafts and the left and right extended cases, the rods protect the left and right swing shafts from obstacles below. The rod is protected on the sides by the outer ends of the left and right swing cases and the left and right overhanging cases, and the upper side is protected by the left and right overhanging cases, thereby preventing bending and breakage due to the causes mentioned above. There is an effect.

(F) Embodiment The embodiment of the present invention will be explained in detail based on the drawings.
FIG. 1 is a side view showing a walking rice transplanter A.
FIG. 2 shows the same plan view.

The rice transplanter A is equipped with a prime mover section 2 at the front of the machine body 1, a transmission section 3 is connected to the rear of the engine section 2, and a shaft case 4 is provided rearwardly protruding from the transmission section. A base end 5a of a gate-shaped frame 5, which will be described later, is connected to the left and right side surfaces of the frame.

A planting gear case 6 is connected to the rear end of the shaft case 4, and a base end of a planting frame 7 is connected to the planting gear case 6, and the planting frame 7 is extended rearward and upward. A handle 8 is attached to the upper end, and a seedling stand 10 with a low front and back height on which four rows of seedling pine can be placed via a seedling stand support frame 9 in the middle part.
are installed consecutively.

The planting gear case 6 is provided with inner left and right planting claws 11 and 11' of two inner rows among the four rows of planting claws so as to be rotatable for planting.

Furthermore, the gate-shaped frame 5 whose base ends are connected to the left and right sides of the transmission part 3 also serves as a case for the power transmission shaft to the outer left and right planted gear cases 14, 14' which are connected to the left and right rear ends of the frame 5. It is structured as follows.

That is, the left and right projecting cases 12, which are the base ends 5a of the gate-shaped frame 5, are located on the left and right side surfaces of the transmission section 3 at positions in front of the front ends of the left and right wheels 17, 17'.
12' protrudes in the left and right direction, and the same case 12,1
The left and right longitudinal cases 13, 13' with a slightly downward slope extend from the outer end of the frame 2' to the rear direction to form a bent part b, forming a gate-shaped frame 5 which is substantially gate-shaped when viewed from above. Outer left and right planting gear cases 14 and 14' are connected to the left and right rear ends of the frame 5, respectively, and among the four planting claws on the inside of the cases 14 and 14',
Two outer rows of outer right and left planting claws 15, 15' are provided so as to be rotatable for planting.

Note that 16 and 16' are left and right swing cases with base ends 16a connected to the left and right sides of the transmission part 3 so that the tips can swing vertically, and left and right wheels 17 and 17' are pivotally supported on the tips. ing.

In the rice transplanter A having such a configuration, in the present invention, as shown in FIG.
The transmission part 3 above and behind 2'
A bell crank 24 has a pivot shaft 21 protruding from the left and right sides of the bell crank 24, and a passive arm 22 and an actuating arm 23 extending downward and rearward from the pivot shaft 21, respectively.
The rear end 2 of the actuating arm 23 is rotatably connected to the
3' to the left and right swing arms 1 via the connecting member 5.
6, 16', and connects the lower end 22' of the passive arm 22 to the left and right swing shafts 26 which support the left and right extended cases 12, 12' and the base ends 16a of the left and right swing cases 16, 16'. The rear ends 27 of the left and right rods 27 are positioned at the same lower end 22'.
a, and the front end 27b of the rod 27 is connected via an equalizer 28 to the front end of a hydraulic cylinder 29 for lifting and lowering the wheels, which is disposed on the front lower surface of the fuselage 1 with its rear end pivoted to the fuselage 1. ing.

As shown in FIG.
The center of the equalizer 28 is connected to the rod front end 29' of the hydraulic cylinder 29, and the front ends 27b of the left and right rods 27 are connected to the left and right ends, respectively, so that the operating force of the hydraulic cylinder 29 is transferred to the left and right rods 27. We are trying to distribute and transmit the information evenly.

Therefore, the fuselage 1 on the left and right wheels 17, 17'
The weight of the bell crank 24 is borne by the tensile stress of the left and right rods 27 and the pushing force of the hydraulic cylinder 29, thereby reducing the weight of the rod 27 and rationalizing the use of hydraulic pressure.

The gate-shaped frame 5 also includes left and right wheels 17 and 1 disposed on the outside of the left and right swing arms 16 and 16'.
By bypassing the outside of 7' from the front, attach the same arm 16,
Since the arm 16' and the left and right wheels 17, 17' are located outside the range of vertical movement, the vertical movement of each arm 16, 16' and each wheel 17, 17' can be performed without any problem.

In addition, the height of the axle 17a of the left and right wheels 17, 17' is made to be approximately the same as the height of the left and right longitudinal cases 13, 13' of the gate-shaped frame 5 in the standard operating state of the rice transplanter A. Wheel 17,1
Since the left and right longitudinal cases 13, 13' are located on the outside of the wheel 7', the cases 13, 13' act as side bumpers, and protect the left and right wheels 17, 17' from external obstacles. This prevents accidents such as stepping on the feet of auxiliary workers.

As mentioned above, in this invention, the rod for interlocking the hydraulic cylinder and the left and right wheels is located between the left and right swing axes and the left and right extended cases, which has the effect of protecting the rod from external obstacles. There is.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a rice transplanter having a wheel lifting mechanism according to the present invention. FIG. 2 is a plan view of the same. Third
The figure is an enlarged side view showing the arrangement of the swing shaft, overhang case, and rod. Figure 4 is a schematic plan view of the equalizer. 1... Body, 3... Mission part, 5... Gate-shaped frame, 5a... Base end, 12, 12'... Left and right projecting case, 13, 13'... Left and right longitudinal case,
14, 14'... Outer left and right planted gear case, 16,
16'... Left and right swing case, 17, 17'...
Left and right wheels, 26...swing axis, 29...hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] The base ends 16a of left and right swing cases 16, 16' are rotatably pivoted to the left and right sides of the transmission section 3 of the fuselage 1, respectively, and left and right wheels 17, 17' are connected to the tips of the cases 16, 16'. The gate can be raised and lowered freely, and the base end 5a is fixed to the left and right sides of the transmission part 3 at a higher position than the left and right swing shafts 26, and the gate extends rearward around the outside of the left and right wheels 17, 17'. Outer left and right planted gear cases 14, 14' each having a planting claw at the rear end of the mold frame 5.
In the rice transplanter A, the left and right rods 27 for interlocking the hydraulic cylinder 29 for lifting and lowering the wheels provided on the machine body 1 and the left and right swing cases 16, 16' are connected to the base end 1 of the left and right swing cases.
6a and a base end 5a of a gate-shaped frame.