JPH02195813A - Automatically oscillating crawler mower - Google Patents

Abstract

PURPOSE:To provide the title mower so designed that a leading rotator is put to reciprocating rotation to the extent of a specified angle through a crank mechanism and this reciprocating rotation is transmitted to a subordinate rotator, thereby making a supporting cylinder oscillate left and right. CONSTITUTION:A leading rotator 4 is put to reciprocating rotation to the extent of a specified angle through a crank mechanism 3, and this reciprocating rotation is transmitted to a subordinate rotator 5 so as to repeating horizontal reciprocating motion, thereby making a supporting cylinder 6 oscillate left and right. Thus, a mowing edge 1 behaves in the same manner as that with a mowing worker, and the range of oscillation can also be easily regulated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a self-propelled mower capable of automatically swinging its head in a predetermined angular range, in which the mowing blade moves while mowing from side to side. be.

[Conventional technology]

Conventional manual mowers, in which the operator carries the engine on his back, holds the blade support tube in his hand, and sweeps the blade from side to side to mow the grass, have the drawback of requiring a considerable amount of labor.

Therefore, a self-propelled type mower has been developed, but there is still no such self-propelled mower that can automatically swing the mowing blade from side to side widely and narrowly within a predetermined angular range. It had not been developed.

[Problem to be solved by the invention]

Particularly with self-propelled mowers, it is important to expand the area to be weeded by swinging the rotary mowing blade left and right within a predetermined angle range by manual operation depending on the situation, and to perform efficient mowing work. This is an essential issue in order to improve the practicality of self-propelled mowers, but the design of the mower's oscillating blade depends on the method of power separation and the reliable oscillation of the mower. There were various problems with how to simultaneously perform the swinging action and transmit power to the mowing blade.

The applicant actually built a prototype machine and repeated prototype research, and developed the self-propelled type mower of the present invention capable of automatic swinging.

[Means to solve the problem]

The details are as follows with reference to the accompanying drawings.

A main rotary body 4 is connected to a gear box 2 that transmits rotation to the mowing blade 1 and is reciprocated within a predetermined angle range by a crank mechanism 3.
A secondary rotating body 5 which is reciprocated by the main rotating body 4 is attached horizontally on the gear box 2,
The base 7 of the support tube 6 of the mowing blade 1 is integrally attached to this driven rotary body 5, and the power is transferred to the support tube 6 through the gear box 2.
This is a self-propelled mowing machine that is capable of automatic swinging. This is related to.

A gear box 2 that transmits rotation to the mowing blade 1 is provided with a main rotating body 4 that reciprocates within a predetermined angle range by a crank mechanism 3, and a secondary rotating body 5 that is reciprocated by the main rotating body 4 is connected to a gear box 2. In a swingable self-propelled mower that is attached horizontally on a box 2 and in which a base *7 of a support tube 6 of a mowing blade 1 is integrally attached to this driven rotating body 5, a crank arm is connected to a crank board 9. A pivot position 11 of W is provided to be variable by a rack and pinion mechanism n, a slide shaft opening of this rack and pinion mechanism n is made to protrude to the rear of the crank disk 9, and a pushing mechanism 14 is provided for pushing this protruding end η. , the push mechanism 14 is provided so as to be operated by an operating section provided on the handle or at a location that is easy to operate, and the swing angle can be adjusted widely or narrowly by operating the operating section. This invention relates to a self-propelled mower that can swing automatically.

A main rotary body 4 is connected to a gear box 2 that transmits rotation to the mowing blade 1 and is reciprocated within a predetermined angle range by a crank mechanism 3.
A secondary rotating body 5, which is reciprocated by the main rotating body 4, is attached to the gear box 2 in a horizontal state. In this swingable self-propelled mower, two supports 1) are erected on the left and right sides on the driven rotating body 5, and a rotation transmission shaft is provided in the center to transmit rotational power to the mowing blade l. A stop is erected, a screw rod W is erected on the side of this rotation transmission shaft, and the base 7 of the support tube 6 of the mowing blade 1 is attached to a slide body provided on two supports 17 so as to be able to slide up and down. A nut portion 21 provided integrally with the slide body is screwed onto the screw rod 19, a rotating portion n is provided for rotating the screw rod 1g, and the rotating portion n is rotated to rotate the slide body 20. This invention relates to a self-propelled mowing machine capable of automatically swinging, characterized in that a transmission device n that can be raised and lowered, which transmits rotation to the mowing blade 1 even when the mowing blade 1 is raised and lowered, is provided on the rotation transmission shaft slide.

[Effect]

Power is transmitted from the rotation transmission shaft through the gear box 2 to the mowing blade 1 through the transmission shaft 8 in the support tube 6.
rotates.

At the same time, the power is also divided into the crank mechanism 3, and the crank disk 9 rotates.

crank! The mounting arm 50 rotates, for example, the main rotating body 4 via the crank arm 10 by the rotation of the IF9.
is moved up and down, so the main rotating body 4 rotates back and forth.

The secondary rotating body 5 connected to the main rotating body 4 reciprocates horizontally on the gear box 2 in conjunction with the secondary rotating body 5 .

Since the base 7 of the support cylinder 6 of the mowing blade l is integrally attached to the secondary rotating body 5, the support cylinder 6 swings left and right as the secondary rotating body 5 reciprocates, and the mowing blade l mowing the grass by sweeping it left and right and moving back and forth.

Further, when an operation P816 provided on the handle portion or an easily operated location is operated, the pushing mechanism 14 is operated, and the protruding end opening of the slide base shaft 13 protruding rearward of the crank disk 9 is pushed.

When the protruding end 1 of the slide base B is pushed, the rack and pinion mechanism 4 moves, for example, the vertical slide 47 up and down, and the pivot position 11 of the crank arm 10 relative to the crank disk 9 moves. That is, since the degree of eccentricity changes, the stroke of the vertical movement of the connecting rod 40 that rotates the main rotating body 4 changes, and the angular range of the reciprocating rotation of the main rotating body 4 and the secondary rotating body 5 changes, so that the rotation of the support cylinder 6 changes. The swing angle range can also be adjusted widely.

In addition, a screw rod 19 erected on the side of the rotation transmission shaft stop at the center of the two pillars 17 erected on the secondary rotary body 5 is attached to the rotary portion n.
Rotates due to -1 Support tube 6 supporting the mowing blade 1
A slide body with an integrally provided base 7 slides up or down. At this time, as the slide body moves up and down, the transmission device n that transmits rotation to the mowing blade also moves up and down with respect to the rotation transmission axis, so that the power is transmitted to the mowing blade l without any problem.

〔Example〕

First, the power transmission mechanism of this machine will be explained in detail.

The drawing shows an engine section attached to the center of the machine, whose rotational power is transmitted to the power intake shaft in the gear box 2 installed at the front lower part of the machine, and a bevel gear mechanism 1 in the gear box 2.
The rotation transmission shaft mounted on the gear box 2 is rotated by the support 1i? The figure shows a case where rotation is transmitted to a transmission shaft 8 in J6 and the mowing blade 1 is rotated by a transmission device 81 which also includes a bevel gear mechanism.

On the other hand, the driving force is transmitted from the drive shaft stop of the engine to the wheels, and the gear transmission n that transmits this driving force is equipped with a speed reduction device A by meshing the worm blades and the worm wheel U. - Separate the driving force of the wheel U from the reduction shaft (supply) of the wheel U. A bevel gear 37 is superimposed and fixed on the worm wheel d, and this bevel gear d rotates the power dividing wing installed horizontally in the longitudinal direction of the fuselage via a bevel gear q°, and this rotation is provided above the front of the fuselage. The figure shows a case in which the power is transmitted to the crank disk 9 to rotate the crank disk 9 (the drawing shows the transmission to a pulley via parallel shaft profiles, but this transmission mechanism can be designed in various ways).

The lower end of the crank rod 10 is moved up and down by the rotation of the crank disk 9, a fulcrum is provided in the middle part, and the horizontal arm 39 disposed between the crank mechanism 3 and the guide wheel is swung up and down. Connecting rod 40 hanging from the other end
The connecting rod 40 moves the mounting arm 5 up and down.
This figure shows a case in which the main rotating body 4 employing a semi-cutter bevel gear is caused to reciprocate through the gear 0. An attachment arm 50 is provided to protrude from a connecting ring 50° fitted into an attachment tube 4° protruding from the back surface of the main rotating body 4.

In addition, to explain in detail the mechanism for adjusting the eccentricity of the crank arm 10 of the crank board 9, when you pull the operating lever 41, for example, for the operating section provided at the handle center, a wire 42 attached to the lower end of the operating lever 41 is pulled. is pulled, and the rotating arm 43 installed on the side of the fuselage is pulled rearward and rotates.

By this rotation, the gear is rotated by U° via the gear material provided above the rotary arm 43, and the push arm 6 is pushed forward, so that the protruding end η of the slide base opening is moved from the rear of the crank panel 9 to the crank panel. Push it towards 9.

This forward sliding of the slide base shaft causes the vertical slide 47 to protrude to the outer periphery via the rack and pinion mechanism, and this movement of the vertical slide 47 causes the upper end of the crank rod 10 to be pivoted on the eccentric guide frame mallet. Move the crank bin 11' and fix it! 48' is fixed and the eccentricity is varied.

A cylindrical case 5 is erected on the upper part of the gear box 2, two pillars 17 are erected in which cylindrical case δ, slide body stops are fitted to these two pillars 17, and the slide body part is The figure shows a case in which the base 7 of the support tube 6 of the mowing blade 1 is integrally provided in the front, and a long window is formed in the front of the cylindrical case through which the base 7 of the support tube 6 can be raised and lowered.

Further, the elevating mechanism of the mowing blade 1 will be explained in detail.

A rotation transmission shaft is erected in the center of two columns 17 erected on the gear box 2, and a screw rod is erected on the rear side of the shaft, and a slide fitted to the two columns 17 is installed. The nut portion 21 provided on the body is screwed into the screw shed, and the screw shed is rotated by turning the manual rotating nodle 49 provided at the upper end of the screw ratio, and the slide body is raised and lowered by the action of the bolt and nut. The figure shows a case where the holding position of the mowing blade 1 can be adjusted up and down.

In addition, instead of using a manual rotary nozzle 49 for the rotating part n, a small motor is installed, and a switch part is provided on the nozzle part, so that it is designed so that it can be raised and lowered automatically by operating the switch at hand. Also good.

The drawings merely show an example of implementation, and the structure of the power transmission system and desired operating system may be modified in various ways.

〔Effect of the invention〕

Since the present invention is configured as described above, the main rotating body reciprocates by a predetermined angle by the crank mechanism, and this reciprocating rotation is transmitted to the secondary rotating body to repeat the horizontal reciprocating movement, so that the support cylinder also swings left and right. As a result, the mowing blade becomes an excellent mower that automatically performs the same action as a conventional hand-powered portable mower, in which the operator manually sweeps away the mower.

Moreover, the width of this oscillation can be easily and freely adjusted by operating the operating section located in an easily accessible location.
Moreover, the self-propelled mower can be automatically oscillated and exhibits the excellent feature that the height of the mowing blade can be easily and freely adjusted by operating the rotating part.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is a perspective view of the machine, Fig. 2 is a partially cutaway side view of the machine to explain power transmission, and Fig. 3 shows the main parts. Side view with a portion cut away,
FIG. 4 is a plan view with a part of the main part cut away, and FIG. 5 is a front view with a part of the crank mechanism section cut away. l... Grass cutting blade, 2... Gear box, 3... Crank mechanism, 4... Main rotating body, 5... Follow rotating body,
6... Support tube, 7... Base, 8... Transmission shaft, 9...
・・Crank plate, 10・・Crank arm, 11・・
・Pivotal position, Knead...Rack and pinion mechanism, Mouth...Slide base shaft, 14...Pushing mechanism, Speed...Handle section, Description...Operation section, 17...Strut, Additional... ...Rotation transmission shaft, rising...screw rod, addition...sliding body, ■...nut part, n...rotating part, kyo...transmission device. January 23, 1999 Applicant: Matsuo Aizawa Agent: Akie Yoshii

Claims (1)

[Claims] 1. A gear box that transmits rotation to the mowing blade is provided with a main rotating body that reciprocates within a predetermined angle range by a crank mechanism, and a secondary rotating body that is reciprocated by the main rotating body is connected to a gear. It is installed horizontally on the box, and the base of the support tube of the mowing blade is integrally attached to this driven rotating body, so that power is transmitted from the transmission shaft in the support tube to the mower blade via the gear box. A self-propelled mower capable of automatic swinging is characterized in that it is provided in such a way that the mower is also provided so that the rotation of a crank plate of a crank mechanism is also caused to take part. 2 A main rotating body that reciprocates within a predetermined angle range is provided in the gear box that transmits rotation to the mowing blade, and a secondary rotating body that is reciprocated by the main rotating body is placed in a horizontal state on the gear box. In a swingable self-propelled mower in which the base of the support tube of the mowing blade is integrally attached to the driven rotating body, the pivoting position of the crank arm with respect to the crank board is freely variable by a rack and pinion mechanism. The slide shaft of this rack and pinion mechanism is made to protrude to the rear of the crank board, and a pushing mechanism is provided for pushing this protruding end, and this pushing mechanism is operated by an operating part provided on the handle part or a location that is easy to operate. 1. A self-propelled grass mower capable of automatically swinging, characterized in that the swinging angle can be freely adjusted widely or narrowly by operating an operating part. 3 A main rotating body that reciprocates within a predetermined angle range is provided in the gear box that transmits rotation to the mowing blade, and a secondary rotating body that is reciprocated by the main rotating body is placed in a horizontal state on the gear box. In a swingable self-propelled mower in which the base of the support tube of the mowing blade is integrally attached to the driven rotating body, two pillars are erected on the left and right sides on the driven rotating body, and A rotation transmission shaft for transmitting rotational power to the mowing blade is erected, a screw rod is erected on the side of this rotation transmission shaft, and the base of the support cylinder of the mowing blade is attached to two supports so that it can slide up and down. A rotating part is provided integrally with the slide body, a nut part provided on the slide body is screwed onto a screw rod, and a rotating part is provided to rotate the screw rod, and the rotating part is rotated to raise and lower the slide body. A self-propelled grass mower capable of automatically swinging, characterized in that a rotation transmission shaft is provided with a transmission device that can be raised and lowered to transmit rotation to a grass cutting blade.