JPH0347467Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a front mower and aims to prevent damage to mowing marks caused by earth scraping by the limit gauge wheels of the front mower.

(Prior Art) In the case of a front mower attached to the front end of a vehicle, one of its left and right ends protrudes outward from the left and right of the vehicle so that the mower can mowing the edges while turning around standing trees, stones, etc. A limit gauge wheel is attached to the rear end of the protrusion to prevent the cutting blade from contacting the ground and being damaged.

Conventionally, the limit gauge wheel has been mounted so that it cannot rotate about a vertical axis.

(Problem to be solved by the invention) When the front mower's left and right outward protrusions are used to swing around a standing tree, etc. for border cutting, the front mower is designed so that the cut grass outlet formed at one of the left and right ends of the mower is on the outside. rotate. At this time, since a rear wheel steering type vehicle can turn in a small radius around one front wheel, the turning radius of the limit gauge wheel disposed near the outer side of the front wheel becomes quite small. If this limit gauge wheel was installed so that it could not rotate around the vertical axis, if the limit gauge wheel came into contact with the ground when the vehicle was turning, it would scrape the soil, causing damage to the mowing marks made by the mower. .

The present invention aims to solve the above problems.

(Means for Solving the Problems) The features of the technical measures taken by the present invention to solve the problems of the prior art are that a grass clippings discharge port 39 is provided at one end of the left and right ends of the mower deck 12; , a gauge wheel 18 for adjusting cutting height;
In a front mower 3 equipped with limit gauge wheels 40 and 41 for preventing the cutter 11 from coming into contact with the ground, the front mower 3 is attached to the front end of a rear wheel steering type vehicle 1, and the In addition, a limit gauge wheel 41 disposed on the rear side of the mower deck 12 outside the front wheels 8 of the vehicle 1 is rotatably mounted around a vertical axis.

(Function) When the limit gauge wheel 41 contacts the ground when the vehicle 1 turns, it rotates about the vertical axis.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a tractor vehicle, and a front mower 3 is attached to the front portion of the tractor vehicle 1. As shown in FIG.

The tractor vehicle 1 is of a rear wheel steering type in which the vehicle turns by steering the rear wheels 9 with four-wheel drive, and has a driver's seat 4, a steering wheel device, etc. in the front, and an engine 5 in the rear. is installed. A transmission case 6 is provided in front of the engine 5, a front axle case 7 protrudes from the left and right side surfaces of the transmission case 6, and a front wheel 8 is supported at the tip of the case 7.

The power of the engine 5 is transmitted to the left and right front wheels 8 via a differential gear device within the transmission case 6, and is also transmitted to the rear wheels 9 via a transmission shaft extending rearward from the transmission case 6. Furthermore, the power of the engine 5 is also transmitted to a PTO shaft 10 that protrudes forward from the front end surface of the transmission case 6.

The mower 3 has three sets of cutters 11 that rotate around a vertical axis, and the cutters 11 are connected to the mower deck 1.
It is attached to the lower end of the cutter shaft supported by 2. Power receiving device 15 on the top surface of mower deck 12
The input shaft 16 of the device 15 and the PTO shaft 10 of the tractor 1 are removably connected via a universal connection shaft 17. The cutter 11 is driven from this power receiving device 15 via a belt transmission mechanism or the like.

Reference numeral 19 denotes a pair of left and right cutting height adjustment gauge wheels, which are attached by inserting a vertical shaft 21 into a cylinder 20 at the front end of a support arm 19 attached to the mower deck 12 so as to be relatively rotatable and vertically adjustable. Vertical axis 21
A pivot piece 22 is attached to the lower end, and a shaft 23 is pivoted to the center of the pivot piece 22 . Note that the rear end of the support arm 19 is attached to a mounting member 24 that has a U-shape in side view and is attached to the upper surface of the rear end of the mower deck 12, and a support piece 25 is attached to the upper surface of the mower deck 12 in the middle of the support arm 19. It is attached through.

Reference numeral 26 denotes a pair of left and right mounting arms, the rear ends of which are attached to a mounting piece 27 attached to the front axle case 7 so as to be vertically swingable. The mounting arm 27
The side view U-shaped member 28 is connected to the left and right opposing side plates 29.
It is formed by being sandwiched between.

Reference numeral 30 denotes a pair of left and right connecting arms, the front ends of which are attached to the upper surface of the mower deck 12 so as to be vertically swingable. Then, the rear end of the connecting arm 30 is removably inserted into the U-shaped member 28 of the mounting arm 26, and the pin 31 prevents the arms 26, 30 from coming off.
is attached to the front of vehicle 1. Further, the rear end of the mower deck 12 is suspended from a connecting arm 30 via a U-shaped rod 32.

34 is a hydraulic cylinder, and its rear end is attached to a bracket 34 attached to the front end of the vehicle 1 so as to be able to swing vertically.

35 is a lift arm, one mounting arm 26
The mounting arm 26 is also connected to the other mounting arm 26 by a transverse shaft 36 that is pivoted to a bracket 34. Then, the telescopic rod 3 of the cylinder 33
7 is pivotally supported in the elongated hole 38 of the lift arm 35. As a result, the mower 3 can be lifted up by the extension of the telescopic rod 37 and run normally.

Here, the left end of the mower 3 protrudes laterally and outwardly from the outer end surface of the outermost front wheel 8 of the vehicle 1. This is for mowing while circling around standing trees, stones, etc. In addition, Moore 3
The right end of the mower 1 also protrudes outward from the left and right of the vehicle 1, and a cut grass discharge port 39 is formed at the right end of the mower 1, and a duct (not shown) of a grass collection device can be connected to the discharge port 39. It is considered a thing. Therefore,
Mower 3 is used for cutting while circling around standing trees, etc.
Rotate so that the left end protrusion is inward.

At the rear ends of the left and right end protrusions of the mower 3,
Limit gauge wheels 40 and 41 are attached to prevent the cutter 11 from being damaged due to contact with the ground.

The limit gauge wheel 40 at the right end is pivoted about the left-right axis by a pivot piece 42 extending rearward from the mounting member 24.

The left end limit gauge ring 41 is attached to the mounting member 24.
A bracket 43 extends rearward from the bracket 43, and a cylindrical body 44 is attached to the rear end of the bracket 43.
A support shaft 45 is inserted and attached so as to be rotatable about a vertical axis, a pivot piece 46 is attached to the lower end of the support shaft 45, and a shaft 47 is pivoted to the pivot piece 46 .

When the left end of the front mower 3 protrudes leftward and outward from the vehicle 1 to swing around a standing tree or the like for edge cutting, the limit gauge wheel 41 at the rear end of the left end protrusion has a fairly small turning radius. It will turn around. In particular, in this embodiment, since the vehicle 1 is of a rear wheel steering type, the vehicle 1 turns around the left front wheel 8 as its center. Therefore, the turning radius of the limit gauge wheel 41 at the left rear end of the mower 3, which is close to the left front wheel 8, becomes extremely small.

However, the left limit gauge wheel 41 is attached to the mower 3 so that it can rotate freely around the vertical axis, so even if it contacts the ground, it rotates around the vertical axis, rolls smoothly on the ground, and scrapes the ground. This will not cause any damage to the mowing marks made by the mower 3.

Note that the right limit gauge wheel 40 is farther from the left front wheel 8 than the left limit gauge wheel 41, so even though it cannot rotate around the vertical axis, the turning radius is smaller than that of the left limit gauge wheel 41. Since it is large, there is no need to consider soil excavation, but it may be attached to the mower 3 so as to be rotatable about the vertical axis like the limit gauge wheel 41 on the left.

In addition, in the above embodiment, edge cutting is performed at the left end of the mower 3, but if edge cutting is performed by using the left end of the mower 3 as a cut grass discharge port and protruding the right end outward from the left and right sides of the vehicle side, the right end The limit gauge wheel attached to the rear end of the side may be freely rotatable about the vertical axis.

(Effects of the invention) According to the invention, the grass clippings discharge port 39 is provided at one end of the left and right ends of the mower deck 12, and the gauge wheel 18 for adjusting the cutting height and the cutter 11 are provided with a mower for preventing the cutter 11 from coming into contact with the ground. Limit gauge wheel 40,4
A front mower 3 equipped with
Since the limit gauge wheel 41 is placed on the rear side of the mower deck 12 on the outer side of the vehicle and is rotatably mounted around the vertical axis, the vehicle can be rotated using the front wheel 8 on the opposite side of the discharge port 39 as a fulcrum by rear wheel steering. Even when mowing around standing trees etc. while rotating the limit gauge wheel 41 in a small radius, if the limit gauge wheel 41 comes into contact with the ground, it rotates around the vertical axis and rolls smoothly on the ground, cutting the soil. It does not scrape the mower and does not damage the mower's cutting marks.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a front mower attached to a vehicle according to an embodiment of the present invention, and FIG. 2 is an enlarged side view of the same main part. 1...Vehicle, 3...Front mower, 41...
Limit gauge wheel.

Claims (1)

[Scope of utility model registration request] There is a grass clipping outlet 3 at one end of the left and right sides of the mower deck 12.
9, a gauge wheel 18 for adjusting the cutting height, and limit gauge wheels 40, 41 for preventing the cutter 11 from coming into contact with the ground. 1, the discharge port 39
A front mower characterized in that a limit gauge wheel 41 is disposed on the rear side of the mower deck 12 on the opposite side and outward of the front wheels 8 of the vehicle 1, and is rotatably mounted around a vertical axis.