JPH0631841Y2 - Power tiller - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a power tiller.

[Conventional technology]

The power tiller has an engine mounted on the front part of the machine base, the rear part of the machine base is fixed to the upper part of the mission case, and the output of the engine is transmitted to the input shaft of the mission case via the transmission mechanism. A cultivating rotor arranged below the mission case is rotationally driven via a transmission mechanism.

[Problems to be solved by the invention]

In the above-described power tiller, there is a possibility that stones may be generated between the mission case and the tiller rotor during the rotor tillage work, and the mission case may be deformed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power cultivator that protects the mission case, has a robust fender mounting portion, and can be mounted easily. To do.

[Means for solving problems]

According to the configuration of the present invention, the engine is mounted on the front part of the machine base, the rear part of the machine base is fixed to the mission case, the output of the engine is transmitted to the input shaft of the mission case via the transmission mechanism, and the transmission in the mission case is performed. In a power cultivator that rotationally drives a cultivating rotor arranged at a lower part of a mission case via a mechanism, a vertically long mission case is arranged so as to extend obliquely downward and forward from the rear of the engine, and the machine base is located at the rear of the mission. A pair of left and right upright portions arranged so as to cover both side surfaces of the upper half of the case, and extending below the outer peripheral locus of the tilling rotor to the axial center side and arranged so as to sandwich both side surfaces of the mission case. And a pair of left and right hanging parts that extend outward from the upper edges of these hanging parts, and the lower edges of the rising portions are connected to the outer edges. And a right pair of horizontal portions together, which is bolted fixed to the flange portion of the transmission case and interposed respectively between said upstanding portion is hanging portion spacer,
A substantially inverted L-shaped base end of the fender is disposed so as to be in close contact with and overlap with a lower side of a shoulder portion constituted by the horizontal portion and the hanging portion and fixed to the hanging portion. .

[Action]

According to the above-mentioned means, most of the mission case is disposed between the left and right upright portions and the left and right hanging parts of the machine base and fixed to them, so that the mission case is reinforced by the machine base and protected. To be done.

Even if a stone bite occurs between the mission case and the cultivating rotor, the mission case can be protected by the hanging portion that covers the outer surface of the mission case.

The fender receives the bounce of the soil due to the cultivating of the rotor, but it receives the bounce force not only at the fixed part of the hanging part but also at the horizontal part, so the mounting part of the fender is robust. Also, the fender can be easily attached and detached.

〔Example〕

FIG. 1 is a side view showing an example of a power tiller to which the present invention is applied, FIG. 2 is a plan view of the same, and FIG. 3 is a rear view of an essential part thereof.

The base 2 of the power tiller 1 is composed of a pair of left and right plate members 3 and a plate member 4 connecting between rear end portions thereof. The pair of left and right plate members 3 integrally includes a substantially inverted L-shaped plate portion 5 and a standing plate portion 6 that stands upright in the latter half portion thereof. The substantially inverted L-shaped plate portion 5 is the horizontal portion 5
a and a vertical portion 5b extending vertically downward from the inner edge of the horizontal portion 5a, and the standing plate portion 6 is vertically upward from the outer edge of the horizontal portion 5a in the rear half of the substantially inverted L-shaped plate portion 5. Stand up.
Between the inner surfaces of the rear end portions of the left and right standing plate portions 6, a plate member 4 having a substantially U-shape in plan view is arranged with its open side facing forward, and the both are fastened by bolts 7.

Then, the rear half portions of the left and right plate members 3 of the machine base 2 are arranged so as to sandwich both side surfaces of the mission case 8. The mission case 8 is a vertically long case and is arranged in a state of being tilted rearward. The vertical portion 5b extending below the left and right substantially inverted L-shaped plate portions 5 has its lower edge inclined rearward, and in the mission case 8 portion, the upper portion of the outer peripheral locus of the tiller rotor 24 and the rotor shaft 23 which will be described later. It extends to a rear edge of the mission case 8 through a position substantially in the middle of the above, and the rear edge extends upward from the rear end along substantially the rear edge of the mission case 8.
Thus, the hanging portion A of the mission case 8 portion of the vertical portion 5b extends to a position on the axial center side of the outer peripheral locus of the tilling rotor 24. The central portion of the lower edge of the mission case 8 portion of the vertical portion 5b is formed in an arc shape upward, and from above the fastening portion with the mission case 8 formed at the rear lower end to near the outer peripheral locus of the tiller rotor 24. The trailing edge is formed in a forward concave shape. Then, a plurality of places are fastened by bolts 9 with a spacer (not shown) interposed between the chassis case 2 and the flange portion 35 at the periphery of the mission case 8, and the machine base 2 is fixed to the mission case 8.

The engine 10 is mounted in front of the horizontal portions 5a of the left and right plate members 3 of the machine base 2. The engine 10 has an output shaft 1
1 protrudes to the left when viewed from the rear, and the cylinder portion is arranged so as to incline rearward. The upper edges of the standing plate portions 6 of the left and right plate members 3 of the machine base 2 are inclined rearward below the cylinder portion substantially along the inclination of the cylinder portion, and further rearward from the vicinity of the rear end of the cylinder portion. The standing plate 6 extends upward and extends from the rear end.
The trailing edge extends vertically downward. The power of the output shaft 11 is the input shaft 1 protruding leftward from the mission case 8.
2 is transmitted via a belt and pulley mechanism. That is,
The output shaft 11 and the input shaft 12 are provided with two-stage pulleys 13 and 14 each having two pulleys having different diameters.
A transmission belt 15 is hung between these to transmit the power of the output shaft 11 to the input shaft 12. And two-stage pulley 1
By shifting the belt 15 around the inner pulleys 13a, 14a or the outer pulleys 13b, 14b of the pulleys 3, 14, the gear can be shifted in two steps. In addition, the transmission of the power is brought into and out of contact with the tensioner 16 that can come into contact with the belt 15.
The tensioner 16 has a base end which is a standing plate portion 6 of the machine base 2.
It is pivotally supported at a portion that tilts upward along the cylinder portion of, and is connected to a belt tension clutch lever 18 provided on the operating portion of the handle 17 via a spring 19 and a wire 20, and is normally separated from the belt 15. Power is not transmitted (in that case, one pulley 1
The belt 1 is provided by the stopper device 21 provided on the 3 side.
When the belt tension clutch lever 18 is operated, the belt tension clutch lever 18 rotates upward to abut the belt 15, and the belt 15 is stretched so that power can be transmitted to the input shaft 12. 22 is the above pulley 13, 1
4 and the belt 15 and the like. Then, the power of the input shaft 12 of the mission case 8 is passed through the mission case 8 below the mission case 8 by the transmission chain wound between the sprockets arranged above and below the mission case 8 in the left-right direction. Is transmitted to the rotor shaft 23 arranged in the field, and the tilling rotor 24 is rotationally driven. Even if a stone bite occurs between the mission case 8 and the cultivating rotor 24 at the time of cultivating the rotor, since the outer surface of the mission case 8 is covered with the hanging part A of the machine base 2, the mission case 8 is protected. In addition, since the hanging part A covering the outer surface of the mission case 8 has a flat surface, the occurrence of stone biting is small. Then, the base ends of the fenders 25 are fixed to the lower sides of the shoulder portions of the left and right substantially inverted L-shaped plate portions 5 of the machine base 2. The base end of the fender 25 is bent in a substantially inverted L shape, and the base end of the substantially inverted L shape is arranged so as to closely adhere to and overlap with the lower side of the shoulder portion.
Fixed at 6. Therefore, although the fender 25 receives the bouncing of the soil due to the tillage of the rotor, the bouncing force is received not only by the bolt 26 but also by the horizontal part 5a of the machine base 2, so that the mounting part of the fender 25 can be configured robustly. Since the vertical portion 5b has a flat surface, it can be easily attached.

A substantially inverted U-shaped bracket 27 between the outer surfaces of the rear upper end of the pair of left and right standing plates 6 of the machine base 2 behind the engine 10.
The lower part of the bracket is fitted, and the lower part of the front end of the bracket 27 is rotatably fixed to the standing plate portion 6 by a bolt 28 provided with a spacer between the left and right side pieces 27a. Then, the left and right side pieces 27a on the rear side of the bracket 27 have three upper and lower parts.
One mounting hole 29 is clear, and either of the left and right mounting holes 2
A bolt 28 is mounted between the brackets 9, and the rear side of the bracket 27 is fixed to the rear end of the standing plate 6. In this way, the front end of the bracket 27 is pivotally attached to the upright plate portion 6, and the rear part changes its mounting position depending on the position of the mounting hole 29, so that the mounting posture of the bracket 27 changes in three stages. The handle bases are fixed inside the left and right ends of the piece 27b, and the posture of the handle 17 extending rearward and upward is changed. In this way, the height of the handle 17 can be adjusted in three steps. The handle attachment portion of the upper piece 27b of the bracket 27 has a convex curved surface that extends upward along the peripheral surface of the handle 17.

Vertical parts 5 extending below the left and right substantially inverted L-shaped plate parts 5 of the machine base 2
A hitch 30 is attached between the rear ends of the b, and a resistance rod 31 is attached to the hitch 30.

[Effect of device]

As described above, the present invention has the following effects.

Since most of the mission case is arranged between and fixed to the left and right uprights and the left and right hanging parts, the mission case is reinforced and protected by the machine base.

A part of the machine base extends axially beyond the outer track of the cultivating rotor to cover the outer surface of the mission case, so that the mission case is protected even if a stone bite occurs between the mission case and the cultivating rotor. Can be achieved.

The substantially inverted L-shaped base end of the fender is arranged so as to be in close contact with and overlap with the lower side of the shoulder portion formed by the horizontal portion and the hanging portion of the machine base, and is fixed to the hanging portion. Although the fender receives the bounce of soil by plowing, it receives the bounce force not only at the fixed part of the hanging part, but also at the horizontal part, so the mounting part of the fender is robust and the fender can be easily attached and detached.

[Brief description of drawings]

The drawing shows one embodiment of the present invention, FIG. 1 is a side view showing an example of a power tiller to which the present invention is applied, FIG. 2 is a plan view thereof, and FIG. 1 is a power tiller, 2 is a stand, 3 and 4 are plate members, 5 is a substantially inverted L-shaped plate portion, A is a hanging portion, 6 is a standing plate portion, 7, 9, 26,
28 is a bolt, 8 is a transmission case, 10 is an engine, 11 is an output shaft, 12 is an input shaft, 13 and 14 are two-stage pulleys, 15 is a transmission belt, 16 is a tensioner, 17
Is a handle, 18 is a belt tension clutch lever,
19 is a spring, 20 is a wire, 21 is a stopper device, 22 is a cover, 23 is a rotor shaft, 24 is a plowing rotor, 25 is a fender, 27 is a bracket, 29
Is a mounting hole, 30 is a hitch, and 31 is a resistance rod.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An engine is mounted on a front part of a machine base, a rear part of the machine base is fixed to a mission case, and an output of the engine is transmitted to an input shaft of the mission case via a transmission mechanism to transmit power in the mission case. In a power cultivator that rotationally drives a cultivating rotor arranged at a lower part of a mission case via a mechanism, a vertically long mission case is arranged so as to extend obliquely downward and forward from the rear of the engine, and the machine base is located at the rear of the mission. A pair of left and right upright portions arranged so as to cover both side surfaces of the upper half of the case, and extending below the outer peripheral locus of the tilling rotor to the axial center side and arranged so as to sandwich both side surfaces of the mission case. A pair of left and right hanging parts that extend outward from the upper edges of the hanging parts, and the lower edges of the upright portions are connected to the outer edges. A pair of horizontal portions are integrally provided, and the upright portion and the hanging portion are respectively fixed to the flange portion of the mission case by bolts with spacers interposed therebetween, and the base end of the fender having a substantially inverted L-shape is formed. A power tiller characterized by being arranged so as to be in close contact with and overlapping with a lower side of a shoulder portion composed of a horizontal portion and a hanging portion and being fixed to the hanging portion.