JPH0353625Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a mounting device for a front mount mower.

(Prior art) When a front mount mower is attached to a tractor, a pair of unbendable left and right connecting links are pivoted at the rear end of the tractor so that they can swing vertically, and both are connected. A front-mounted mower, which is located in front of the tractor and performs reaping work while following the ground, is rotatably connected to the front of the link, and a front-mounted mower, which is located at the front of the tractor and performs reaping work while following the ground, is pivotally connected to the front of the link. The mower is suspended through a pair of left and right suspension devices, and each suspension device is provided with means for allowing the mower to move up and down around the pivot point between the mower and the connecting link, and the mower is suspended at the front of the tractor. There is one that moves up and down (see US Pat. No. 4,325,211).

In the above, the mower is allowed to move up and down around the pivot joint between the mower and the connecting link.
Even if there is an obstacle such as a stone on the ground, the rear side of the mower can easily overcome the obstacle due to the vertical movement of the mower.

However, in the above method, even during work, both connecting links are restrained by the lifting device,
Free swinging in the vertical direction was hardly allowed.

(Problem to be solved by the invention) For this reason, in the above-mentioned conventional method, vertical movement and horizontal tilting of the entire mower are hardly allowed during operation, and therefore, tilting of the ground in the longitudinal and horizontal directions is hardly allowed. There have been problems in that the mower's ability to follow unevenness is poor, and its ability to overcome obstacles on the front side of the mower is also poor.

It is an object of the present invention to provide a mounting device for a front mount mower that can solve the above problems of the present invention.

(Means for Solving the Problems) The present invention provides a front mower 11 via a pair of left and right connecting links 12 pivotally supported at the front of a traveling vehicle 1.
is provided so as to be movable up and down, and the longitudinal midway part of the connecting link 12 and the left and right sides of the rear part of the mower deck 15 are connected by a hanging device 13 that allows the rear part of the mower 11 to rise and restricts the lowering position. The mower 11 is connected to the mower 11 via the connecting link 12 and the hanging device 13.
In order to achieve the above-mentioned object, the following technical measures are taken in the device in which a lifting drive device 14 for lifting and lowering the entire body is provided between the vehicle 1 and both connecting links 12.

That is, the present invention is characterized in that a play portion 55 is provided at the connecting portion between the lifting drive device 14 and the left and right connecting links 12, allowing the left and right connecting links 12 to move up and down individually.

(Function) According to the present invention, the mower 11 and the connecting link 12
By vertical movement of the mower 11 around the pivot portion, the rear side of the mower 11 can easily overcome obstacles on the ground.

Also, due to the vertical movement of the entire mower 11, the mower 1
1. The front side easily overcomes obstacles on the ground, and due to this vertical movement and the vertical movement of the mower 11 around the pivot joint, the mower 11 is suitable for slopes and unevenness in the front and rear directions of the ground. follow.

Further, by tilting the entire mower 11 in the left-right direction, the mower 11 can favorably follow slopes and unevenness of the ground in the left-right direction.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIGS. 2 and 3, 1 is a tractor;
Reference numeral 2 denotes a tractor body, which is constructed by installing an engine 3 and a transmission case 4 in the above order in the forward direction.

A pair of front axle cases 5 project from both sides of the front part of the transmission case 4 on the left and right, and a front PTO shaft 6 projects forward from the front surface of the transmission case 4.

7 is a front wheel, 8 is a rear wheel used as a steering wheel, 9 is a seat, and 10 is a steering wheel.

Reference numeral 11 denotes a front mount mower, which has a connecting link 12, a hanging device 13, and an elevating drive device (hereinafter sometimes simply referred to as the elevating device) at the front of the vehicle body 2.
14, it is removably mounted offset to the left side and located in front of the front wheel 7.

The mower 11 has a mower deck 1 that opens downward.
5, and below the mower deck 15, three sets of rotary cutting blades 16 are arranged substantially in the left-right direction.

An input case 18 having an input shaft 17 is provided at the center in the left and right direction of the mower deck 15, and the input shaft 17 is connected to the front PTO shaft 6 via a universal joint shaft 19.
is connected to.

A pair of left and right front gauge wheels 20 for adjusting the cutting height are provided on the front edge of the mower deck 15 so as to be movable and adjustable in the vertical direction, and a front limit gauge wheel 21 is provided on the left and right center of the front edge of the mower deck 15 but,
A pair of left and right rear limit gauge wheels 22 are provided at the front edge of the mower deck 15, respectively.
5 grounding is prevented.

As shown in FIG. 1, there are a pair of connecting links 12 on the left and right sides, which are non-bendable and have a roughly U-shaped shape when viewed from the side, and are fixed to the front axle case 5 at the rear end. The left and right pivot shaft 2 is attached to the bracket 23.
It is provided around 4 so that it can swing vertically.

A ball joint part 25 is provided at the front end of each link 12, and a mower deck 15 is attached to this ball joint part 25.
The front left and right sides each have a bracket 26 and a pivot shaft 2.
It is rotatably provided via 7.

Note that when the mower 11 is in a normal working state as shown in FIG.
7, and when the tractor 1 pushes the mower 11 during work, a downward pressing force is not applied from the tractor 1 to the mower 11 via the connecting link 12, and as a result, the mower 1
1 is designed to easily overcome obstacles.

The connecting link 12 includes front and rear link bodies 28 and 29
and a fixing device 30 that connects both link bodies 28 and 29 in a separable manner.

The rear link body 29 includes a pair of left and right side plates 31, and an insertion frame 32 that is fixed to the front part of the side plates 31 and into which the rear part of the front link body 28 is removably inserted.

There are a pair of hanging devices 13 on the left and right, and a mower deck 15 is provided at the rear of the link body 29 of each connecting link 12.
The left and right sides of the rear part are suspended, and the mowing height can be adjusted as follows.

That is, as shown in FIGS. 5 and 6, 33 is a hanging link, and a U-shaped member 34 having an inverted U shape,
A nut 35 fixed to the lower end of the U-shaped member 34;
It consists of an L-shaped shaft 36 which is screwed onto a nut 35 and is disposed below and has an L-shape.

A pair of left and right reinforcing plates 37 are provided at the rear of the rear link body 29.
is fixed thereto, and a U-shaped member 34 is detachably attached to this portion by a connecting pin 38.

The connecting pin 38 is inserted into the elongated hole 39 of the U-shaped member 34 so as to be vertically movable, and this movement allows the mower deck 15 to rotate about the pivot shaft 27 and the ball joint 25.

40 is a pair of left and right connecting plates, mower deck 15
Several insertion holes 41 are formed in the connecting plate 40, and the connecting plate 40 is provided upright on each side of the left and right sides of the rear part.
An L-shaped shaft 36 is inserted into one of these insertion holes 41 in a removable manner.

By changing the insertion hole 41 through which the L-shaped shaft 36 is inserted, the connecting link 12 and the mower 11 can be connected to each other.
The distance between the rear parts changes, making it possible to adjust the cutting height.

As shown in FIGS. 7 to 9, the lifting device 1
Reference numeral 4 is for raising and lowering the mower 11 via a connecting link 12 and a hanging device 13, and is configured as follows.

That is, a pair of left and right support plates 43 protrude forward from both sides of the front portion of the mission case 4, and a left and right cylinder 44 is fixed to both support plates 43.

A rotation shaft 45 is rotatably inserted into the cylinder 44. A pair of left and right interlocking levers 46 are fixed to both ends of the rotation shaft 45 so as to project forward.
An operating lever 47 is fixedly provided on the left side in a downwardly projecting manner.

Reference numeral 48 denotes a double acting type hydraulic cylinder, which is interposed between the operating lever 47 and the left bracket 23.

Reference numeral 49 denotes a pair of left and right hanging members, including a U-shaped member 51 having a pair of left and right side plates 50 connected at the upper part and having an inverted U shape, and a nut fixed to the lower end of the U-shaped member 51. 52 and a connecting shaft 53 screwed to the nut 52.

A connecting lever 4 is provided between the side plate portions 50 of the U-shaped member 51.
6 are movably inserted, and these connect to the connecting pin 5.
4, they are separably connected.

The connecting pin 54 is movably inserted into the elongated hole 55 of the U-shaped member 51, and this movement allows each connecting link 12 to swing independently, allowing the entire mower 11 to move vertically and tilt in the horizontal direction. Therefore, the elongated hole 55 is used as the play portion 55.

The connecting shaft 53 connects to the inner side plate 31 of the rear link body 29.
It is connected by a connecting pin 57 to a bracket 56 fixedly attached to the bracket 56 .

According to the embodiment configured as described above, during work, the front cutting height adjustment gauge 20 is grounded, and the rear part of the mower 11 is suspended by both connecting links 12 via the hanging device 13. , the connecting pin 54 is located in the middle of the elongated hole 55 of the U-shaped member 51.

Then, power is transmitted from the front PTO shaft 6 to the input shaft 17 to rotationally drive the cutting blade 16 while pushing the mower 11 toward the tractor 1.
As a result, the cutting blade 16 cuts the lawn, grass, etc.
Release to the right.

In this case, each connection link 12 has a rear part of the mower 11 connected to the pivot shaft 27 of the mower 11 and the ball joint part 25.
Since the mower 11 is suspended via a hanging device 13 that allows vertical movement, the rear part of the mower 11 easily overcomes obstacles such as stones on the ground due to the vertical movement.

Furthermore, in the lifting device 14, the vertical movement of the connecting pin 54 within the elongated hole 55 of the U-shaped member 51 allows independent vertical swing of each connecting link 12, and the vertical movement of the entire mower 11. Since tilting in the left and right directions is allowed, the following effects are achieved.

That is, due to the vertical movement of the mower 11 as a whole, the front side of the mower 11 can easily overcome obstacles on the ground.
Due to the vertical movement around the ball joint portion 25, the mower 11 satisfactorily follows the irregularities and inclinations of the ground in the front and back direction.

Further, by tilting the mower 11 in the left-right direction, the mower 11 can satisfactorily follow irregularities and inclinations in the left-right direction of the ground.

In addition, when adjusting the cutting height of the mower 11,
The cutting height of the mower 11 can be easily adjusted by moving and adjusting the front gauge wheel 20 for cutting height adjustment in the vertical direction and by changing the insertion hole 41 through which the L-shaped shaft 36 is inserted in the hanging device 13. can.

Further, in the lifting device 14, the hydraulic cylinder 4
8 is single, so the structure is simple and costs can be reduced.

When the tractor 1 with the mower 11 attached is driven on the road, the hydraulic cylinder 48 is extended, the interlocking lever 46 is raised via the operating lever 47 and the rotation shaft 45, and the connecting pin 54 is set in a U-shape. When the mower 11 reaches the upper end of the elongated hole 55 of the member 51 and the connecting link 12 is lifted by the hanging member 49, the mower 11 rises as shown by the imaginary line in FIG.

Furthermore, a working machine other than the mower 11 is attached to the tractor 1,
For example, it is also possible to attach a snow blower, a blade, etc., and in this case, it is possible to attach a snow blower, a blade, etc.
With the rear link bodies 28 and 29 disconnected and the mower 11 equipped with the front link body 28, the mower 1
1 from the tractor 1.

After that, another working machine equipped with the front link body 28 is attached to the tractor 1.

In addition, since the hydraulic cylinder 48 is of a double-acting type, it is possible to perform work while pressing the working machine against the ground, and it is also possible to perform blade work etc. well.

In addition, in the example, vertical movement of the mower was allowed by inserting the connecting pin movably into the elongated hole in the hanging device or the lifting device, but instead of using the connecting pin or the elongated hole, etc. , chain or other means may be used.

(Effects of the invention) As described in detail above, according to the invention, the front-mounted mower has good followability to the ground, and the mower can be operated by connecting the connecting link and each side of the rear part of the mower deck with a hanging device. In addition to the effect of being able to climb over obstacles with the rear end, there are the following unique advantages.

In other words, the connecting part between the lifting drive device and the left and right connecting links has a play part that allows the link to be moved up and down individually, so even if there is an obstacle in front of the mower during harvesting, the play part will allow the link to move up and down independently. When the connecting links move up and down individually, together with the vertical tolerance provided by the hanging device, the mower's ability to overcome obstacles on the ground on the front side of the mower is also good, and the reaping work can be performed satisfactorily.
The present invention has the above advantages and is of great practical benefit.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the main part, FIG. 2 is a side view of the whole, FIG. 3 is a plan view of the same, and FIG. 4 is a plan view of the main part of FIG. Fig. 5 is a partial cross-sectional side view of the hanging device, and Fig. 6 is A-A in Fig. 5.
A sectional view taken along the line A, FIG. 7 is a partial side view of the lifting device, and each of FIGS. 8 and 9 is taken along B-B in FIG. 7.
FIG. 4 is a cross-sectional view taken along line C-C. 1... Tractor (driving vehicle), 11... Front mount mower, 12... Connection link, 13...
...Hanging device, 14... Lifting device, 24... Pivoting shaft, 27... Pivoting shaft, 33... Hanging link, 3
8, 54... Connection pin, 39, 55... Long hole, 4
9... Hanging member.

Claims (1)

[Claims for Utility Model Registration] A front mower 11 is provided so as to be movable up and down via a pair of left and right connecting links 12 pivotally supported at the front of the traveling vehicle 1, and the front mower 11 is provided so as to be movable up and down through a pair of left and right connecting links 12 pivotally supported at the front of the traveling vehicle 1. The left and right sides of the mower 11 are connected to each other by a hanging device 13 that allows the rear end of the mower 11 to rise and restricts the lowering position, and the mower 11 is raised and lowered as a whole through the connecting link 12 and the hanging device 13. In one in which the device 14 is provided between the vehicle 1 and both connecting links 12, a play portion 55 is provided at the connecting portion between the lifting drive device 14 and the left and right connecting links 12, allowing the left and right connecting links 12 to move up and down individually. A mounting device for a front mount mower, which is characterized by: