JPH09238533A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve easiness by decreasing weight and further to lower the height of an engine mounting part. SOLUTION: In this mower with which the turns of an engine are changed into linear motion by an eccentric rotator 7 and link members and transmitted to a reciprocative cutter 4 having a pair of reaping blades 5a and 5b, a reaping blade driving member 14 is provided for performing seesaw motion around a specified longitudinal rod 13 while engaging the respective reaping blades 5a and 5b. This reaping blade driving member 14 is linked to a link mechanism 17, and the rotation of the eccentric rotator 7 is passed through the link mechanism 17 and the reaping blade driving member 14 so as to symmetrically, linearly and reciprocatively displace a pair of reaping blades 5a and 5b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mower equipped with a reciprocating cutter.

[0002]

2. Description of the Related Art There is already a portable mower suitable for mowing grass and the like, and the outline thereof will be described below with reference to FIGS. 2 and 3. FIG.

[0003] That is, reference numeral 1 denotes a central portion of the fuselage, which comprises an engine 2 and a transmission section 3. The bottom surface of the fuselage center 1 is formed on a sled 3 'for sliding the fuselage.

Reference numeral 4 denotes a reciprocating cutter that laterally extends from the mission unit 3. A pair of cutting blades 5 are comb-shaped.
a and 5b are held by a guide means (not shown) which is the same as the body so as to be capable of linearly reciprocating displacement.

[0005] The transmission section 3 has a built-in pinion gear 6 connected to the engine 2 and a crank gear 7 meshed with the pinion gear 6 serving as an eccentric rotating body.

The crank gear 7 is rotatably supported around a specific vertical axis 8 of the mission unit 3, and the two eccentric parts on the upper and lower surfaces are provided with two crank pin parts 9 having a phase difference of 180 degrees.
a and 9b are formed.

[0007] One crankpin portion 9a is connected to one cutting blade 5a via a link member 10a and an extension fitting 11a, and the other crankpin portion 9b is connected via another link member 10b and an extension fitting 11b. It is connected to another cutting blade 5b.

Reference numeral 12 denotes a steering handle extending upward from the central portion 1 of the body, and has a pair of grasping portions.

In the above configuration, the rotation of the engine 2 is transmitted to the crank gear 7 via the pinion gear 6, and the rotation of the crank gear 7 is linearly reciprocated through the crank pin portions 9a and 9b and the link members 10a and 10b. Is transmitted to the cutting blades 5a and 5b, whereby the pair of cutting blades 5a and 5b generate a symmetrical linear reciprocating displacement, so that the mowing can be performed.

In use, as shown in FIG. 2, the steering handle 12 is gripped with both hands, the sled 3 'of the center part 1 of the body is grounded, and the body is pulled and moved under the operating state of the reciprocating cutter 4. To do.

[0011]

Since the above mower is used for pulling and moving, it is required that the mower be as light as possible. The present invention aims to meet this demand. is there.

[0012]

In order to achieve the above object, the present invention is as follows. That is, in a mowing machine that converts the rotation of the engine into a linear motion by an eccentric rotator and a link member and transmits the reciprocating cutter to a reciprocating cutter having a pair of mowing blades, each mowing blade is engaged and performs a seesaw motion about a specific longitudinal axis. A configuration in which a cutting blade driving member is provided, and the cutting blade driving member is connected to a link mechanism, and rotation of the eccentric rotator causes a symmetrical linear reciprocal displacement of a pair of cutting blades via the link mechanism and the cutting blade driving member. And

At this time, the link mechanism can be formed arbitrarily, but preferably, a guide member fixed to the body, a slide member inserted in the guide member so as to be capable of linearly reciprocating displacement, and a base end portion of the slide member And a second link member connecting the tip of the sliding member and the cutting blade drive member.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view showing a main part of a mower according to the present invention, which will be described below with reference to this drawing. In the following description, the same components as those in the related art are denoted by the same reference numerals.

Reference numeral 13 denotes a vertical axis which stands upright on the same part as the fuselage center part 1, and a T-shaped cutting blade drive member 14 is fitted on the vertical axis 13 so as to be rotatable and displaceable.

The cutting blade driving member 14 has long holes 15a and 15b formed at two positions on both sides of the longitudinal axis 13, and one of the long holes 15a is provided with a pin provided at the base end of one cutting blade 5a. The other long hole 15b is internally fitted with a pin 16b provided at the base end of another cutting blade 5b.

The crank gear 7 as an eccentric rotating body has a crank pin portion 9a formed only on one side, and a central portion provided with a longitudinal axis 8 supported by the transmission portion 3.
It is made rotatable around.

Reference numeral 17 denotes a link mechanism for connecting the cutting blade drive member 14 and the crankpin portion 9a, and is specifically formed as follows.

That is, a guide tube (guide member) 18 is provided in the same shape as the central portion 1 of the fuselage, and a sliding body 19 is fitted in the guide tube 18. The sliding body 19 has two block portions 20a and 20a.
b, and a shaft portion 21 in which these are integrally connected. A bearing 22 is provided on the inner surface of the central portion of the guide tube 18 for guiding the shaft portion 21 so as to be slidable. The bearing 22 is formed of a metal cylindrical portion 23 directly in contact with the shaft portion 21.
And a rubber tube 24 for supporting the metal tube 23
Consists of

The block 20a on the base end side of the sliding member 19 and the crankpin 9a are connected to the first link member 25.
Connect with. At this time, the first link member 25 has the large-diameter annular portion 25a externally fitted to the crankpin portion 9a and the small-diameter annular portion 25b pivotally mounted on the block portion 20a.

On the other hand, the block portion 2 on the tip side of the sliding body 19
0b and the cutting blade drive member 14 are connected by a second link member 26. At this time, the second link member 26 has the annular portion at one end pivotally attached to the block portion 20b and the annular portion at the other end pivotally attached to the overhang portion of the cutting blade drive member 14.

The other points are formed in the same manner as the conventional one.

Next, the operation of the above configuration will be described. The rotation of the engine 2 is transmitted to a crank gear 7 via a pinion gear 6, and the crank gear 7 is rotated around a vertical axis 8.
Therefore, the crank pin portion 9a revolves around the longitudinal axis 8 and, in this connection, the first link member 25 and the block portion 20a are linearly reciprocated by the guide action of the guide tube 18.

This linear reciprocating displacement is transmitted to the cutting blade driving member 14 via the shaft portion 21, the block portion 20b and the second link member 26, and the cutting blade driving member 14
Do a seesaw movement around.

This seesaw motion is caused by the long holes 15a, 15b.
Is transmitted to the mowing blades 5a, 5b via the attachment points of the pins 16a, 16b, whereby the pair of mowing blades 5a, 5b generate a symmetrical linear reciprocating displacement, and the mowing is enabled. .

In the above-described embodiment, the crank pin portion 9a and the cutting blade drive member 14 are connected via the sliding member 19 or the like. Alternatively, the first link member 25 may be slightly longer. Both may be connected only by a single link member.

[0027]

According to the present invention configured as described above,
In addition to omitting one of the two conventionally formed crankpin portions of the crank gear, the link mechanism associated with one of the crankpin portions can also be omitted, thereby reducing the overall weight and improving the lightness. In addition, the weight of particularly heavy parts is reduced, and the weight distribution can be balanced, and the height of the center of the fuselage can be reduced by the height of one crankpin, which reduces the dimensional aspect. Therefore, the handling can be improved.

According to the second aspect of the present invention, the reciprocating cutter remote from the crank pin can be operated accurately without any inconvenience. Therefore, the reciprocating cutter and the engine can be offset. This can be adjusted by changing the length of the tube), which increases design flexibility.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of a mower according to the present invention.

FIG. 2 is a view showing a use state of a conventional push mower.

FIG. 3 is a diagram showing an internal structure and the like of a transmission unit of the mower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Central part of body 2 Engine 4 Reciprocating cutter 5a and 5b Cutting blade 7 Eccentric rotating body 9a Crank pin part 10a and 10b Link member 13 Vertical axis 14 Cutting blade drive member 17 Link mechanism 18 Guide member 19 Slider 25 First link member 26 Second link member

Claims (2)

[Claims] 1. A mowing machine for converting the rotation of an engine into linear motion by an eccentric rotating body and a link member and transmitting the reciprocating cutter to a reciprocating cutter having a pair of mowing blades, wherein each mowing blade is engaged, and a seesaw is provided around a specific longitudinal axis. A cutting blade drive member that moves is provided, and the cutting blade drive member is connected to a link mechanism. The rotation of the eccentric rotating body causes a linear reciprocating displacement symmetrical to a pair of cutting blades via the link mechanism and the cutting blade drive member. A mowing machine characterized by causing. 2. A link mechanism comprising: a guide member fixed to an airframe; a slide member inserted in the guide member so as to be capable of linearly reciprocatingly displaceable; and a link member connecting a base end of the slide member and an eccentric rotator. The mowing machine according to claim 1, comprising one link member and a second link member connecting a tip end of the sliding body and a cutting blade drive member.