JP3140622B2 - Reciprocating mower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating type mowing machine for mowing grass on the ground by gripping two cutting blades which reciprocate relatively by driving an engine with an operation handle. .

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 5 to 7, a reciprocating mowing machine of this type includes two operating blades 3, 5 which are reciprocated by an engine 1 in opposite directions.
It is provided to operate by. That is, the cutting blades 3, 5 having the blade portions 9, 9...
The support rod 15 is fixed to the support rod 15 by bolts 13, 13, and is supported by a bolt 19 through an elongated hole 17 so as to be slidable back and forth. Cutting blades 3 and 5 are support cases 1
1 are reciprocally movable in opposite directions by means of a reciprocating device 21 provided therein. That is, the other ends of the links 29, 31, one ends of which are fitted to the cams 25, 27, which are fixed at symmetric positions to the cam shaft 23 pivotally supported in the support case 11, are pivotally connected by the shafts 33, 35.

The engine 1 is directly fixed to the upper surface of the support case 11, and a rotating shaft 39 which engages with the boss of the clutch drum 37 of the engine 1 is arranged in parallel with the cam shaft 23, and the small gear 4
1, a camshaft 2 via a reduction gear 45 composed of a large gear 43
3 is driven. A sliding cover 47 for sliding on the ground is fixed to the lower surface of the support case 11.

[0004] The operating handle 7 is configured as follows. That is, the support case 11 has
A support plate 51 fixed to the lower end of the support 9 is fixed by a bolt 53, and a handle boss 55 rotatable in the horizontal direction is fixed to an upper end of the column 49 by a screw handle 57.
The handle boss 55 is provided with a handle rod 61 that is rotatable around a horizontal shaft 59 so as to be fixed by a lever 63. Handle part 6 is provided at the upper end of handle rod 61.
5 is rotatably pivoted about a horizontal shaft 67 and is fixed by a lever 69.

[0005] In performing mowing work, an operator
Holding the horizontally fixed handle 65, the cutting blades 3, 5 reciprocating in the engine 1 are held horizontally, and are pulled and moved while being supported on the ground by the sliding cover 47. Numeral 5 reciprocates in mutually opposite directions by the engine 1 and cuts grass on the ground by the blades 9, 9,.

[0006]

Conventionally, the speed reducer 45 is provided in the support case 11. Since the operation of the support case 11 is performed at a position close to the ground surface, water containing sand and dust enters through a gap between the cutting blades 3 and 5 and the opening of the support case 11, and the internal bearing and shaft gear In such a case, the parts to be replaced have to be replaced at the time of repair, and especially expensive gears need to be replaced.

[0007]

According to the present invention, a speed reducer 45 capable of being separated from a cutting blade is provided above a support case at an appropriate distance.

[0008]

In the mowing operation, the speed reducer is separated from the gear and the bearing at a height where water is less likely to enter, and water can be prevented from entering the gears and bearings. Although water enters the support case, the number of bearings is small, so that the use of expensive sealed bearings does not significantly increase the manufacturing cost.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In FIGS. 1 to 4, the same reference numerals as those shown in FIGS. 5 to 7 of the above-described conventional example represent the same components, and description thereof will be omitted. 1 to 4, the lower end of a support tube 71 of an appropriate length is fitted on the upper surface of the support case 1 and fixed by bolts 73, and the upper end of the support tube 71 is connected to the lower end of the reduction case 75 via a vibration isolator 77. And fixed by bolts 79.

A speed reduction case 7 having a speed reduction device 80 provided therein.
5 is fixed to the lower surface of the engine 1, and a large gear 85 meshing with a small gear 83 engaged with the boss shaft 81 of the clutch drum of the engine 1 is supported by an intermediate shaft 87 provided alongside the boss shaft 81. A small gear 89 integral with the gear 85 meshes with a small gear 93 engaged with the upper end of a drive shaft 91 provided on a coaxial line with the boss shaft 81 to form a reduction gear 80. The drive shaft 91 passes through the inside of the support tube 71 and the lower end is engaged with the cam shaft 23.

When the mowing operation is performed, the power of the engine 1 is reduced through the reduction gear 80, the cam shaft 23 is rotated via the drive shaft 91, and the cutting blades 3 and 5 are moved in opposite directions by the cams 25 and 27. Reciprocate. The operator grips the operation handle 7, slides the sliding cover 47 to the ground, and pulls the cutting blades 3 and 5 to perform mowing. During the operation, water containing dust enters the support case 11, but does not enter because the speed reduction case 75 is located at a high position separated from the support case 11.

[0012]

According to the present invention, the following effects are obtained. That is, (1) the number of expensive sealed bearings can be reduced to reduce the manufacturing cost. (2) Eliminate gear wear due to water intrusion, eliminate expensive gear replacement during repairs, and reduce the number of replacement parts such as bearings and shafts that are worn by water intrusion to reduce repair costs.
(3) When used as a mowing-type mower in which the engine and the mowing device are connected by a long connecting rod, the reduction gear can be provided on the engine side, so that the weight balance is good and the work is easy.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a plan sectional view taken along line III-III in FIG. 4 of the main part.

FIG. 4 is an enlarged sectional side view of the same.

FIG. 5 is a side view of a conventional example.

FIG. 6 is an enlarged plan sectional view of the essential part taken along line VII-VII in FIG. 7;

FIG. 7 is a side sectional view of the essential part taken along line VI-VI in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 3, 5 Cutting blade 7 Operation handle 9 Blade part 11 Support case 21 Reciprocating device 80 Reduction device

Claims (1)

(57) [Claims] 1. A reciprocating device 21 is provided in a support case 11 for superimposing and reciprocatingly supporting two cutting blades 3, 5 having a large number of blade portions 9, 9 arranged side by side. A reciprocating mower equipped with an operating handle 7 for integrally fixing the engine 1 to the support case 11 for driving the device 21 via the speed reducer 80, wherein the speed reducer 80 and the engine 1 are connected to the support case. 11. A reciprocating mower according to claim 11, wherein said mower is provided at an appropriate distance above said mower.