JPS635450Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a mower device installed below between the front and rear wheels of a tractor, which enables mowing work that accurately corresponds to the undulations of the ground surface and eliminates uneven mowing. Relating to the provision of a device for the purpose of obtaining.

(Prior art) In the case of a tractor, the axially intermediate portion of the front axle case is pivoted to the vehicle body so that the wheels can touch the ground without lifting off the ground surface even when the ground surface is uneven. The right part is generally swingable up and down. A tractor with a mower mounted below between the front and rear wheels was developed in 1983.
There is one shown in No.-88986 (Utility Model Application Publication No. 57-200428). The mower is attached to the mower via a parallel link consisting of a pair of left and right front connecting rods and a second rear connecting rod. The upper end of the second connecting rod is pivotally connected to the front end of the tractor body, and the lower end of the second connecting rod is pivotally connected to the rear end of the mower.
7 is provided with a gauge wheel for cutting grass by following the ground surface, and each connecting rod is inclined downward toward the rear so that the mower is towed by a tractor.

In addition, as a mower attached to a tractor whose axle case middle part is pivotally supported with respect to the vehicle body and swings up and down, there are
There is one shown in the publication. This is because the mower is attached to the axle case, and the mower follows the ground surface by constantly swinging the axle case and mower together, rather than using a gauge wheel as described above. ing.

(Problems to be Solved by the Invention) In the former conventional type, the upper end of the front connecting rod of the parallel link that attaches the mower to the tractor is pivotally connected to the tractor body at a position in front of the front axle case. This means that the upper end of the front connecting rod is pivoted to the vehicle body behind the front axle case.
The downward slope toward the rear of the front connecting rod becomes nearly vertical, and the force that restricts the mower from moving up and down following the ground surface undulations increases, improving the ability of the mower to follow the ground surface. This is because it becomes worse. Furthermore, if the upper end of the connecting rod is pivoted toward the rear of the vehicle, the slope of the connecting rod must be upward, not downward, as it goes toward the rear, so that the mower will not be towed by a tractor. It will be pushed without any movement, and the tracking performance will be poor due to the force in the direction of hitting the ground. For this reason, the upper end of the front connecting rod was pivotally connected to the vehicle body in front of the front axle case, but when it is pivoted in this way, when the front axle case swings due to undulations on the ground, the front There is a problem in that the axle case interferes with the front connecting rod and restricts the mower from following the ground surface.

On the other hand, in the latter case, which allows the mower to follow the ground surface by constantly rocking the axle case and the mower together, the tracking ability is poorer than in the case where the mower itself follows the ground surface via a gauge wheel. There is a problem with being inferior.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The technical means taken by the present invention to solve the problems of the prior art is that the front wheels 10 are mounted on both left and right ends of the front axle case 9 of the tractor A. The axially intermediate part of the front axle case 9 is pivotally supported by the vehicle body 1, and the left and right parts of the front axle case 9 are vertically swingable. Rods 23, 23 and rear second connecting rod 2
The mower 17 is attached to the mower 17 via a parallel link consisting of 8, the upper end of the front connecting rods 23, 23 is pivotally connected to the tractor A side, the lower end is pivotally connected to the front end side of the mower 17, and the second connecting rod 28 is The upper end is the tractor body 1
The lower end of the mower 17 is pivotally attached to the rear end side of the mower 17.
are provided with gauge wheels 20, 21 for mowing work by following the ground surface, and each connecting rod 23, 23,
Reference numeral 28 is a mower device attached to a tractor that is inclined downward toward the rear, and the upper end of the left front connecting rod 23 is on the left side of the front axle case 9.
The upper end of the right front connecting rod 23 is the front axle case 9
They are located at the points that are pivoted to the right end of each.

(Function) The upper ends of the pair of left and right front connecting rods 23, 23 are pivoted to the left and right parts of the front axle case 9, respectively, so even if the front axle case 19 swings due to undulations on the ground surface, Front axle case 9 and front connecting rod 2
3 and 23 will not interfere with each other. In addition, since the upper end of the front connecting rod 23 is located forward compared to the one pivoted to the rear of the front axle case 9, the angle at which the front connecting rod 23 slopes backward becomes vertical as it goes downward. Even if the mower is towed by a tractor, the force that restricts the mower from following the ground surface undulations is prevented from increasing.

(Example) Hereinafter, an example of the present invention will be explained according to the drawings.
In FIGS. 1 and 2, reference numeral 1 denotes a tractor body of a tractor A, which is composed of an engine 2, a transmission case 3, and the like. Engine 2 is on the bonnet 4
A pair of left and right front axle frames 5 that protrude forward are attached to both sides of the engine 2. A bumper 6 is provided at the front end of the front axle frame 5 so as to protrude further forward than the bonnet 4. A bumper 6 is provided at the front end of the front axle frame 5 so as to protrude forward from the bonnet 4. A bumper 6 is provided at the front end of the front axle frame 5 so as to protrude forward from the bonnet 4. The middle part is pivotally supported, and the front axle case 9
The left and right parts of the machine are vertically swingable, and front wheels 10 are attached to both left and right ends of the machine. The front axle case 4 has a large diameter part 11 in the lateral center thereof which houses a differential device for driving the front wheels 10, and the center shaft 8 is pivotally supported on the large diameter part 11 as described above.

Rear wheels 12 are attached to both sides of the rear of the tractor body 1, and a hydraulic device 14 is provided on the top surface of the rear of the tractor body 1, and has a lift arm 13 that can be driven to swing vertically.
A driver's seat 16 for operating a steering wheel 15 and the like is provided above the vehicle.

The mower 17 mounted on the tractor A includes mowing blade bodies 18 for mowing grass that are arranged in parallel in the horizontal direction and are rotatable around vertical axes, and a machine frame 19 that supports the mower blade bodies 18.
The machine frame 19 has a plurality of gauge wheels 20 and 21 provided at the rear thereof, respectively.
9, that is, the cutting blade body 18 is held at a constant height from the ground surface 22 and is made to follow the ground surface, and the gauge wheel 2
The height position of the cutting blade body 18 can be adjusted and maintained by adjusting the height of 0 and 21. Also, moa 1
7, the front of the machine frame 19 is a pair of left and right front connecting rods 2.
3 and 23 are connected to the left and right parts of the front axle case 9 relative to the center shaft 8, respectively. Above connecting rod 2
3 and 23 are of the turnbuckle type whose length can be freely adjusted, and the upper and lower ends thereof are provided with tongue pieces 24 and 25 that project from the front axle case 9 and the machine frame 19, respectively, and pivot pins 26 and 27 that are lateral to the axis. It is pivoted at the bottom and tilts backward as it goes downwards.

Further, the rear part of the machine frame 19 and the tractor body 1 are pivotally connected by the rear second connecting rod 28, and in this connected state, the machine frame 19 is centered around the pivot connecting portion 28a of the second connecting rod 28 to the tractor body 1. It is said to be able to rotate freely. In this case, the second connecting rod 28 is also inclined downward toward the rear, and the front connecting rod 23
The two connecting rods 23 and 28 constitute a parallel link, and the machine frame 19 is vertically movable in parallel.
It should be noted that the second connecting rods 28 may be a pair on the left and right, or may be a single rod in the center. and allows its follow-up.

The rear part of the machine frame 19 and one end of a bell crank 29 provided on the tractor body 1 above it are connected by a cable member 30 such as a chain. 2 bell crank 31 is connected to one end by a rod 32,
Further, the other end of the second bell crank 31 and the lift arm 13 are connected by a wire 33, and the mower 17 can be moved up and down by driving the lift arm 13 to swing up and down.

A case body 35 containing a power transmission device 34 is attached to the front part of the front axle frame 5, and the input part of the power transmission device 34 is connected to the crankshaft 36 of the engine 2, and the output of the power transmission device 34 is connected to the crankshaft 36 of the engine 2. The cutting blade body 18 is connected to the cutting blade body 18 via a universal joint shaft 37, and the cutting blade body 18 is driven by being supplied with power from the engine 2.

In FIG. 3, the tractor A equipped with the mower device as described above is also equipped with a grass collecting device 38 for collecting grass cut by the mower 17.

A grass collection duct 39 extending rearward is provided at the rear of one side of the machine frame 19 in the left and right direction, and the duct 39
The rear end is connected to the front part of one side of a grass collection container 40 provided at the rear of the tractor body 1;
An exhaust port 41 is formed in the front part of the other side of 0, and
The exhaust port 41 is covered with a ventilation porous material 42 such as a mesh. An exhaust blower 43 is provided in a duct communicating with the exhaust port 41.

On the other hand, an exhaust pipe 45 having a muffler 44 in the middle protrudes from the exhaust part of the engine 2 toward the rear of the tractor A, and a turbine 46 that is rotated by the exhaust gas of the engine 2 is provided at the rear end. A blower 43 is interlocked and connected. The exhaust gas from the engine 2 rotates the turbine 46, which rotates the blower 43, and the grass discharged from the mower 17 is sucked into the grass collection container 38, where the difference in inertial force and Air and grass are separated by the porous material 42 through a filtering action or the like, and the air is exhausted by the blower 43. Further, in this case, the duct 39 is oriented in the tangential direction of the rotational direction of the cutting blade body 18 as shown in the figure.
is extended, so that the grass cut and released by the cutting blade 18 is passed through the duct 39 to the grass collecting container 4.
Since the grass collection container 40 moves toward zero due to inertial force, the grass collecting container 40
It is guided by.

According to the above configuration, a separate power source for driving the blower 43 is not required, and the exhaust gas of the engine 2 is effectively utilized, so that grass collection can be achieved with a simple configuration, which is advantageous.

(Effect of the invention) According to the invention, the upper ends of the pair of left and right front connecting rods 23, 23 for attaching the mower to the tractor are pivotally connected to the left and right parts of the front axle case 9, so that the ground surface is uneven. Even if the front axle case 19 swings due to the front axle case 9, there is no interference between the front axle case 9 and the front side connecting rods 23, 23, and the followability of the gauge wheel of the mower to the ground surface undulations is restricted. This allows you to mow grass without any blemishes. In addition, since the upper end of the front connecting rod 23 is located forward compared to the one pivoted to the rear of the front axle case 9, the angle at which the front connecting rod 23 slopes backward becomes vertical as it goes downward. Even if the mower is pulled by a tractor, the force that restricts the mower from following the ground surface undulations is prevented from increasing. The grass can be mowed evenly by following the grass.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is an overall side view, FIG. 2 is a partially sectional front view of the same, and FIG. 3 is a simplified plan view of the same. A...Tractor, 9...Front axle case, 10...
...Front wheel, 17...Mower, 19...Machine frame, 23...
Connecting rod.

Claims (1)

[Scope of utility model registration request] Front wheels 10 are attached to both left and right ends of a front axle case 9 of the tractor A, and an axially intermediate portion of the front axle case 9 is pivotally supported by the vehicle body 1, so that the front wheels 10 are attached to the left and right ends of the front axle case 9.
The right part is vertically swingable, and a parallel link consisting of a pair of left and right front connecting rods 23, 23 and a second rear connecting rod 28 is provided below between the front and rear wheels 10, 12 of the tractor A. The mower 17 is attached, and the upper ends of the front connecting rods 23, 23 are connected to the tractor A.
The lower end of the second connecting rod 28 is pivotally connected to the front end of the mower 17, and the upper end of the second connecting rod 28 is connected to the tractor body 1, and the lower end is connected to the mower 1.
The mower 17 includes a gauge wheel 20 for mowing the grass by following the ground surface.
21, and each connecting rod 23, 23, 28 is inclined downward toward the rear so that the mower 17 is towed by the tractor 7. A mower device mounted on a tractor, characterized in that the upper end of the connecting rod 23 is pivotally connected to the left side of the front axle case 9, and the upper end of the right front side connecting rod 23 is pivotally connected to the right end of the front axle case 9. .