JPH0687696B2 - Self-propelled mower capable of automatic swing - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a self-propelled self-propelled mower capable of automatic swinging, in which a grass cutting blade swings its head to the right and left in a predetermined angle range for traveling. is there.

[Conventional technology]

Conventionally, a portable human-powered mower, in which an operator carries an engine on his back, holds a support tube of the mowing blade in his hand, and strokes the mowing blade to the left and right to mow the grass, has a drawback in that it requires considerable labor.

Therefore, a self-propelled mower was also developed.However, in such a self-propelled mower, a mower that can automatically and freely swing the mower blade to the left and right within a predetermined angle range has not yet been developed. It was not developed.

[Problems to be Solved by the Invention]

Especially for self-propelled mowers, it is important to operate the hand at your fingertips to swing the rotary mower blade to the left and right within a predetermined angle range to increase the weeding area and perform efficient mower work. This is an essential issue for improving the practicality of self-propelled mowers, but the design of the swivel blade swinging action depends on the method of power sorting and the reliable neck. There were various problems in how to perform the swinging operation and the power transmission to the mowing blade at the same time.

The applicant actually made a prototype and repeated the trial research to develop a self-propelled mower capable of automatic swing according to the present invention.

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

A main bevel gear 4 which reciprocates within a predetermined angular range by a crank mechanism 3 is vertically rotatably provided in a gear box 2 which transmits rotation to a grass cutting blade 1 provided at a lower part of a front side of the machine body, and reciprocatingly rotated by the main bevel gear 4. A sub-bevel gear 5 to be moved is attached to the gear box 2 so as to be horizontally rotatable, a support case 25 is erected on the sub-bevel gear 5, and a support cylinder 6 of the mowing blade 1 is provided in front of the support case 25. A mowing blade 1 which is provided so as to project and transmits power from a rotation transmission shaft 18 in a support case 25 to a transmission shaft 8 in a support cylinder 6 via a gear box 2 so as to be rotatably provided at a tip of the support cylinder 6.
To the main bevel gear 4 and a crank mechanism 3 for reciprocating the main bevel gear 4 in a predetermined angle range.
A crank pulley 51 for rotating the crank disk 9 of the crank mechanism 3 is provided on the upper side of the
The present invention relates to a self-propelled mower capable of automatically swinging, which is provided below the.

Further, a rack and pinion mechanism in which the pivoting position 11 of the crank rod 10 attached to the crankboard 9 is internally provided in the crankboard 9.
The slide rack shaft 13 of the rack and pinion mechanism 12 is projected rearward of the crank disk 9, and a pushing mechanism 14 for pushing the projecting end 13 'is provided. The pushing mechanism 14 is a handle. It is provided so that it can be operated by the operation part 15 or the operation part 16 provided at a place where it is easy to operate.
The pivoting position of the crank rod 10 is moved up and down through the rack and pinion mechanism 12 by operating 16 so that the swinging angle can be adjusted wide and narrow.
The present invention relates to a self-propelled mower capable of automatically swinging.

Further, two columns 17 are erected on the left and right on the secondary bevel gear 5, a rotation transmission shaft 18 for transmitting rotation power to the grass cutting blade 1 is erected in the center, and a screw rod is provided behind the rotation transmission shaft 18. Erected 19,
The base portion 7 of the support cylinder 6 of the mowing blade 1 is integrally provided on a slide body 20 which is vertically slidable on two columns 17, and a nut portion 21 provided on the slide body 20 is screwed to a screw rod 19. A rotary unit 22 for rotating the screw rod 19 is provided, and even if the rotary unit 22 is rotated to move the slide body 20 up and down, the rotation transmitting device 23 that transmits the rotation to the grass cutting blade 1 is provided. The self-propelled grass mower according to claim 1, wherein the rotary transmission shaft 18 is provided.

[Action]

The power is transmitted from the rotation transmission shaft 18 via the gear box 2 to the grass cutting blade 1 via the transmission shaft 8 in the support cylinder 6,
Rotates.

At the same time, the power is also distributed to the crank pulley 51 of the crank mechanism 3, and the crank disk 9 rotates.

The rotation of the crank disk 9 causes the mounting arm 50, which rotates the main bevel gear 4 for example, to move up and down via the crank rod 10, so that the main bevel gear 4 reciprocates.

The sub-bevel gear 5 meshed with the main bevel gear 4 also interlocks and horizontally reciprocates on the gear box 2.

Since the base 7 of the support cylinder 6 of the mowing blade 1 is integrally attached to the sub-bevel gear 5, the support cylinder 6 swings left and right as the sub-bevel gear 5 reciprocates, and the mowing blade 1 Swipe left and right to reciprocate and mow the grass. In addition, when the handle portion 15 or the operation portion 16 provided at an easily operated place is operated, the pushing mechanism is operated.
14 operates to push the protruding end 13 'of the slide rack shaft 13 protruding rearward of the crank disk 9.

When the projecting end 13 'of the slide rack shaft 13 is pushed, the vertical slide 47 is moved up and down by the rack and pinion mechanism 12 via the pinion 12', and the pivot position 11 of the crank rod 10 with respect to the crank disk 9 is moved up and down. Move to. That is, since the eccentricity changes, the stroke of the vertical movement of the connecting rod 40 for rotating the main bevel gear 4 changes, and the angular range of the reciprocating rotation of the main bevel gear 4 and the sub-bevel gear 5 changes, so the support cylinder 6
The angle range of the swinging of the can be adjusted freely and narrowly.

Further, when the screw rod 19 standing upright behind the rotation transmitting shaft 18 at the center of the two columns 17 standing upright on the secondary bevel gear 5 is rotated by, for example, the rotating portion 22 provided on the support case 25, The slide body 20 in which the base 7 of the support cylinder 6 supporting the grass cutting blade 1 is constantly provided slides up or down.
At this time, even if the slide body 20 moves up and down, the transmission device 23 that transmits the rotation to the mowing blade 1 also moves up and down with respect to the rotation transmission shaft 18,
Power transmission to the mowing blade 1 will be performed without any trouble.

〔Example〕

The drawings show a preferred embodiment of the present invention, in which a main bevel gear 4 reciprocally rotated by a crank mechanism 3 in a predetermined angle range to a gear box 2 for transmitting rotation to a grass cutting blade 1 provided at a lower portion of a front side of the machine body. The main bevel gear 4
A sub-bevel gear 5 which is reciprocally rotated by means of is attached to the gear box 2 so as to be horizontally rotatable, a support case 25 is erected on the sub-bevel gear 5, and the grass cutting blade 1 is supported on the front side of the support case 25. A grass cutting blade 1 provided with a cylinder 6 protruding from the rotation transmission shaft 18 in the support case 25 via the gear box 2 to the transmission shaft 8 in the support cylinder 6 and rotatably provided at the tip of the support cylinder 6. Is provided above the main bevel gear 4, and a crank pulley 51 for rotating the crank disk 9 of the crank mechanism 3 is provided. The present invention relates to a self-propelled mower capable of automatic swing, which is provided below the crankboard 9 on the front side of the machine body.

Further, a rack and pinion mechanism in which the pivoting position 11 of the crank rod 10 attached to the crankboard 9 is internally provided in the crankboard 9.
The slide rack shaft 13 of the rack and pinion mechanism 12 is projected rearward of the crank disk 9, and a pushing mechanism 14 for pushing the projecting end 13 'is provided. The pushing mechanism 14 is a handle. It is provided so that it can be operated by the operation part 15 or the operation part 16 provided at a place where it is easy to operate.
The present invention relates to a self-propelled mower capable of automatic swing, characterized in that the swing angle can be adjusted wide and narrow through a rack and pinion mechanism 12 by operating 16.

Further, two columns 17 are erected on the left and right on the secondary bevel gear 5, a rotation transmission shaft 18 for transmitting rotation power to the grass cutting blade 1 is erected in the center, and a screw rod is provided behind the rotation transmission shaft 18. Erected 19,
The base portion 7 of the support cylinder 6 of the mowing blade 1 is integrally provided on a slide body 20 which is vertically slidable on two columns 17, and a nut portion 21 provided on the slide body 20 is screwed to a screw rod 19. A rotation unit 22 for rotating the screw rod 19 is provided, and even if the slide unit 20 is moved up and down by rotating the rotation unit 22, the rotation is transmitted to the grass cutting blade 1, and the transmission device can be moved up and down. The present invention relates to a self-propelled mower capable of automatically swinging, wherein 23 is provided on a rotation transmission shaft 18.

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

In the drawing, an engine 26 is attached to the upper center part of the machine body, and its rotational power is transmitted to a power take-off shaft 30 in the gear box 2 provided in the lower front part of the machine body. By rotating the upright rotation transmission shaft 18, the transmission device 23 also having the bevel gear mechanism 46 incorporated therein is brought into contact with the transmission shaft 8 in the support cylinder 6, and the rotation is transmitted to the transmission device 31 also having the bevel gear mechanism incorporated therein. The case where 1 is rotated is illustrated.

On the other hand, although the drive force is transmitted from the drive shaft 29 of the engine 26 to the wheels 28, the gear transmission 32 for transmitting the drive force is provided with a speed reducer 35 by meshing of the worm 33 and the worm wheel 34. 34 reduction axes
Divide the driving force of the wheel 28 from 36. Worm wheel
The bevel gear 37 is superposed and fixed to the 34, and the power distribution shaft 38 laid in the front-rear horizontal direction of the machine body is rotated by the bevel gear 37 via the bevel gear 37 '. The case where the crank disc 9 is transmitted to the crank disc 9 through the belt 51 to rotate the belt is shown (the drawing shows that the power of the power distribution shaft 38 is transmitted to the parallel shaft 38 'through the gear transmission mechanism). , The crank disk 9 is rotated via the pulley mechanism, but this transmission mechanism can be designed in various ways).

As shown in FIG. 5, the position of the lower end of the crank rod 10, which is pivotally attached to the crank disc 9 in an eccentric state, is moved up and down by the rotation of the crank disc 9, and the horizontal position that is pivotally attached to the crank rod 10 is moved. A fulcrum 39 'for pivotally connecting the middle part of the arm 39 to the front wall of the machine is provided, and the left and right ends of the horizontal arm 39 are vertically swung with respect to the fulcrum 39' by a crank action, and the horizontal arm 39 is hung at the other end of the horizontal arm 39. A connecting ring in which the connecting rod 40 is moved up and down, the lower end of the connecting rod 40 is pivotally attached to the mounting arm 50, and the mounting arm 50 is moved up and down to connect to the mounting arm 50.
The case where the main bevel gear 4 employing a half-beveled bevel gear held by the coupling ring 50 'via the 50' is provided so as to reciprocally rotate is illustrated. A mounting arm 50 is projectingly provided on a connecting ring 50 'fitted on a mounting tube 4'projectingly provided on the back surface of the main bevel gear 4.
When the connecting rod 40 is moved up and down by the crank action of the crank mechanism 3 configured as described above, the main bevel gear 4 reciprocates within a predetermined angle range, and the reciprocating reciprocating motion is performed by the sub bevel gear 5.
Then, the support case 25 erected on the secondary bevel gear 5 is rotated left and right. This support case 25
The support cylinder 6 protruding from the long window 24 of the support case 25 is swung by the left and right reciprocating movements of. Also, the crankboard 9
To explain in detail the mechanism for adjusting the eccentricity of the crank rod 10, when, for example, the operating lever 41 of the operating portion 16 provided on the handle portion 15 is pulled, the wire 42 attached to the lower end of the operating lever 41 is pulled, Rotating arm installed on the side of the machine
43 is pulled backward and rotates. By this rotation, the gear 44 'is rotated via the gear 44 provided above the rotation arm 43, and the pushing arm 45 rotating together with the gear 44' is rotated forward and slid in the body. The freely projecting end 13 'of the slide rack shaft 13 is pushed from the rear of the crank disk 9 toward the crank disk 9. By sliding the slide rack shaft 13 to the front, the vertical slide 47, which is vertically provided on the side via the pinion 12 'of the rack and pinion mechanism 12, is moved upward, and by moving the vertical slide 47 upward, the crank An eccentric guide frame 48, which is slidable up and down with respect to the board 9, is moved upward, and an upper end of the crank rod 10 is pivotally attached to a crank pin 11 'provided on the eccentric guide frame 48. Pivot position of rod 10
11 is moved up and down to change the eccentric sinus penetration, and the eccentric guide frame 48 is fitted into the vertical groove provided on the crankboard 9 to make the vertical movement smooth. The case where it did is illustrated.

A support case 25 is erected on the upper part of the gear box 2, and two columns 17 are erected inside the support case 25.
A long window in which the slide body 20 is fitted to the slide body 20, the base portion 7 of the support cylinder 6 of the mowing blade 1 is integrally provided in front of the slide body 20, and the base portion 7 of the support cylinder 6 can be moved up and down in front of the support case 25. The case where 24 is formed is illustrated.

Further, the elevating mechanism of the mowing blade 1 will be described in detail. The rotation transmission shaft 18 is provided at the center of the two columns 17 standing on the gear box 2.
Is erected, but the screw rod 19 is erected on the rear side of the
Nuts provided on the slide body 20 fitted to the two columns 17
21 is screwed to the screw rod 19, and the screw rod 19 is rotated by turning a manual rotary handle 49 provided at the upper end of the screw rod 19, and the slide body 20 is lifted and lowered by the bolt nut action to hold the mowing blade 1. The case where the position can be adjusted up and down is illustrated.

Instead of using the manual rotation handle 49 for the rotating portion 22, a small motor may be attached, the switch portion may be provided on the handle 15, and the handle may be operated by a switch to automatically move up and down.

The drawings show one example of the embodiment, and the structure of the power transmission system and the desired operation method can be variously changed in design.

[Advantages of the Invention] Since the present invention is configured as described above, the main bevel gear is reciprocally rotated in the vertical direction within a predetermined angle range by the crank mechanism,
This reciprocating movement is transmitted to the sub-bevel gear to change it to horizontal reciprocating movement, and the reciprocating movement reciprocally reciprocates the supporting case erected on the sub-bevel gear to reciprocate the supporting cylinder protruding from the supporting case. The mowing blade becomes an excellent mowing machine that automatically performs the same operation as the worker strokes with a hand like a conventional manpower portable mowing machine.

In addition, the swing width can be easily and freely adjusted by operating the operation part provided at a place where it is easy to operate, and the height of the mowing blade also controls the rotating part. This makes it a self-propelled mower that can be automatically swung with the outstanding features that it can be easily and freely adjusted.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of the machine, FIG. 2 is an explanatory view of power transmission and a side view of the machine body with a part cut away, and FIG. Side view with a part cut away,
FIG. 4 is a plan view in which a part of a main part is cut away, and FIG. 5 is a front view in which a part of a crank mechanism part is cut out. 1 ... Mowing blade, 2 ... Gear box, 3 ... Crank mechanism, 4 ... Main bevel gear, 5 ... Secondary bevel gear, 6 ... Support tube,
7 ... Base, 8 ... Transmission shaft, 9 ... Crankboard, 10 ...
Crank rod, 11 ... Pivot position, 12 ... Rack and pinion mechanism, 13 ... Slide rack shaft, 13 '... Projecting end, 14
…… Pushing mechanism, 15 …… Handle part, 16 …… Operating part, 17…
… Posts, 18 …… Rotation transmission shaft, 19 …… Screw rod, 20 …… Slide body, 21 …… Nut part, 22 …… Rotating part, 23 …… Transmission device, 25 …… Support case.

Claims (3)

[Claims] 1. A main bevel gear 4, which reciprocates in a predetermined angle range by a crank mechanism 3, is vertically rotatably provided on a gear box 2 for transmitting rotation to a mowing blade 1 provided at a lower part of a front side of the machine body. A sub-bevel gear 5, which is reciprocally rotated by a gear 4, is attached to the gear box 2 so as to be horizontally rotatable, and a support case 25 is erected on the sub-bevel gear 5.
A support cylinder 6 of the mowing blade 1 is provided on the front side of the support cylinder 6, and power is transmitted from the rotation transmission shaft 18 in the support case 25 to the transmission shaft 8 in the support cylinder 6 via the gear box 2 to the tip of the support cylinder 6. A crank mechanism 3 is provided above the main bevel gear 4 so as to be transmitted to the rotatably provided mowing blade 1 and can reciprocally rotate the main bevel gear 4 within a predetermined angle range. A self-propelled mower capable of automatic swinging, characterized in that a crank pulley 51 for rotating 9 is provided below a crank panel 9 on the front side of the machine body. 2. A crank rod 10 attached to a crank disk 9.
The pivotally attached position 11 of the rack pinion mechanism 12 is variably provided in the crankboard 9, and the slide rack shaft 13 of the rack and pinion mechanism 12 is projected rearward of the crankboard 9 to push the protruding end 13 '. Providing a moving push mechanism 14,
This pushing mechanism 14 is provided so that it can be operated by the handle portion 15 or the operating portion 16 provided at an easily operated portion, and the operation of the operating portion 16 causes the crank pin 10 to pivot up and down through the rack and pinion mechanism 12. 2. A self-propelled mower capable of automatic swinging according to claim 1, wherein the swinging angle can be adjusted to be wide and narrow. 3. A support shaft 5 is provided with two columns 17 standing on the left and right, and a rotation transmission shaft 18 for transmitting the rotation power to the grass cutting blade 1 is provided upright at the center, and behind the rotation transmission shaft 18. A screw rod 19 is erected on the base, and the base 7 of the support cylinder 6 of the mowing blade 1 is integrally provided on a slide body 20 which is vertically slidable on two columns 17.
A nut portion 21 provided on the slide body 20 is screwed onto a screw rod 19, and a rotating portion 22 for rotating the screw rod 19 is provided.
Even if the slide body 20 is moved up and down by rotating the
The transmission device 23 that can move up and down is transmitted to the rotation transmission shaft.
The self-propelled grass mower according to claim 1, wherein the self-propelled mower is capable of swinging.