JPS621850Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attachment device for attaching a working machine such as a rotary mower or a reciprocating mower to the abdomen of an agricultural tractor.

Many of the implements attached to the abdomen of agricultural tractors are installed at a low position, and are set at the very edge of the ground, so when not in use or when driving on the road, they must be stowed upwards and released from working condition. There is a need.

Generally, the work equipment is lifted up using a lifting arm or a lifting link, and then stored after being lifted up to near the underside of the machine frame.

Conventionally, when driving in this condition, the agricultural tractor would travel on rough terrain, causing strong vertical vibrations, and the implement would also vibrate vertically and horizontally, producing noise, and the cover of the implement would hit the agricultural tractor, causing damage. They put it on.

In this invention, in order to stop this shaking when stored, a vertical stopper surface that protrudes from the top surface of the work machine is provided to restrict the vertical movement of the work machine, and left and right stopper surfaces are also provided to prevent the work machine from shaking in the left-right direction. Furthermore, after the working machine is guided to a proper position on the lower surface of the body frame by the left and right stopper surfaces, the working machine is fixed by being engaged in the vertical and horizontal directions.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is a diagram showing a state in which a rotary mower A is attached to the abdomen of an agricultural tractor.

An agricultural tractor has an engine disposed within a bonnet 1, and the engine is mounted and fixed on a body frame 2 that penetrates the tractor from its front end to its rear end. A front axle bracket 29 is suspended over the body frame 2, a center pin 30 is pivotally supported on the front axle bracket 29, and a front axle 31 is pivotally supported by the center pin 30. 32 is a knuckle arm. Front wheels 3 are supported at both ends of a front axle 31.
Fender 5 integrated on the left and right at the rear of the aircraft frame 2
is provided to cover the rear wheels 4.

Place the sheet 6 on top of the integrated fender 5,
A steering hanger 7 is provided at the front of the seat 6. The abdominal work equipment mounting device of the present invention has a bevel gear box B fixedly installed at the front end of the machine frame 2, obtains power from the front PTO pulley, changes direction in the right angle direction within the bevel gear box B, and V-belt 23. Power is transmitted to rotary mower A.

A link device for pivotally supporting a working machine such as a rotary mower A is pivotally supported by a cross pin 50, and a pair of left and right link devices are provided.

Fig. 2 is a side view of the abdominal work machine attachment device of the present invention, Fig. 3 is a plan view thereof, Fig. 4 is a front view, Fig. 5 is an enlarged side view of the diagonal link, and Fig. 6 is an enlarged plan view. It is a diagram.

At the front end inside the bonnet 1 of the agricultural tractor,
A front PTO pulley 40 is provided which takes the rotation of the engine, and a V-belt 41 is wound around the front PTO pulley 40 to drive the input pulley 28 of the bevel gear box B. A belt tension pulley 27 is in contact with the V-belt 41. Also belt tension pulley 27
is pulled by a spring 43. The bevel gearbox B is fixed to the fuselage frame 2 with mounting bodies 42, and the front side is covered with a cover 26. A V-pulley 33 protrudes from the lower part of the bevel gear box B, and the V-belt 23 is connected between the V-pulley 33 and the input V-pulley 21 of the rotary mower A.
is suspended and attached by a belt tension pulley 24. The belt tension pulley 24 is pulled by a spring 44.

The rotary mower is suspended by two diagonal links 8 and 9. The diagonal links 8 and 9 are pivotally supported by a cross pin 50. Oblique link 8
The distal end thereof is suspended by an arm 10 so as to be rotatable back and forth. The rear end is pivotally connected to an arm 46 extending from the tail wheel support pipe 37.

When the rotary mower A rises, the arm 10 at the front end rotates back and forth to absorb the extension of the link. The arm 10 is fixed to the body frame 2 with an arm bracket 11. Other diagonal link 9
The lower front end is attached to a slotted bracket 22 provided on the upper surface of the rotary mower A so as to be slidable back and forth, and the upper rear end can be pivoted in a one-touch manner using a J-shaped pin 14.

The shape of the J-shaped pin is shown in FIG.
A spring 47 is inserted between. 14c is a stopper projection. J type connecting pin has spring 4
7, the engagement between the diagonal link 9 and the bracket 12 can be released.

The shape of the bracket 12 is shown in FIGS. 12 and 13, and it is fixed to the body frame 2 side through a mounting hole 12c, and the long rod 14b of the J-shaped pin 14 is inserted into the insertion hole 12a. A short rod 14a is fitted into 12b. Then, the diagonal link 9 is inserted into the U-shaped groove and pivotally connected with the J-shaped pin 14.

The diagonal link 9 absorbs the elongation of the link due to the rise of the rotary mower A through the elongated hole of the elongated hole bracket 22.

Rollers 17 and 18 are provided on the bottom of the rotary mower A to prevent the rotary blades from coming into contact with the ground, and a tail wheel 16 is further provided to adjust the height with respect to the ground. The tail wheel 16 is pivotally connected to the side end of the tail wheel support rod 38 via an arm 16a, and by turning the tail wheel height adjustment handle 15, the arm 20
The tail wheel support rod 38 rotates via the arm 16a, and the tail wheel 16 is moved up and down via the arm 16a. The lower end of the tail wheel height adjustment handle 15 is rotatably fixed within a shaft 15a attached to the cover of the rotary mower A, so that rotation of the adjustment handle 15 causes the arm 20 to rotate up and down.

The tail wheel support rod 38 is pivotally supported by a tail wheel support pipe 37, and the tail wheel support pipe 37 is fixed to the cover of the rotary mower A.

Two lifting brackets 34 are fixed on the left and right sides so as to overlap the tail wheel support pipes.

The shape of the lifting bracket 34 is shown in FIGS. 7 and 8.
The figure shows its side and rear views. Hole 34c connecting the lifting links 35 and 19 in the left and right direction
is opened, and above there is a vertical stopper surface 34 that touches the fuselage frame 2 and stops upward lifting.
The left and right stopper surfaces 34b, which prevent the left and right sides from coming into contact with each other when they come into contact with the fuselage frame 2, are formed of inclined surfaces.

The left and right stopper surfaces 34b serve not only as a stopper for swinging from side to side, but also as a guide inclined surface to guide the rotary mower A to the correct position so that it does not rise in a sideways state when lifted. It is.

The lifting bracket 34 has a lifting link 19,
Connect 35. The shape of the lifting link 19 is the first
6 and 17 show front sectional views thereof. The lower pin 19a is inserted into the hole 3 of the lifting bracket.
Insert into 4c. A large diameter hole 19b into which the tip pin of the lifting arm 13 is fitted, and a long hole 19c to prevent it from coming out after fitting are provided.

When the rotary mower A is removed, the area between the lifting arm 13 and the lifting link is removed, and a large diameter hole 19b and a long hole 19c are formed so that both can be easily removed. Other lifting link 3
5 is shown in FIGS. 9, 10, and 11, and is configured to be shorter than the lifting link 19,
In FIG. 14, an L-shaped bolt 45 is used for connection, and by adjusting the length of the L-shaped bolt 45 with a nut and a lock nut, the rotary mower A can be adjusted laterally.

The L-shaped bolt 45 has its non-threaded end 45b inserted into the hole 34c of the lifting bracket 34, and the threaded part 4
5a is screwed onto a nut 35a provided in the L-shaped portion of the lifting link 19. The lifting link 35 is also provided with a large diameter hole 35b and a long hole 35c to facilitate removal from the lifting arm 13. Two lifting arms 13 are provided on the left and right, and their tips are pivotally connected to lifting links 19 and 35.

When the operator rotates the lifting arm about the pivot shaft 36, the front end is raised, and the rotary mower A can be lifted and stored. When the lifting arm 13 is fully rotated, the vertical stopper surface 34a of the lifting bracket 34 hits the lower surface of the fuselage frame 2, and the left and right stopper surfaces 34b also prevent the left and right shaking of the fuselage frame 2.
Fix it by touching it to the side of the

FIG. 18 and FIG. 19 are a front view and a side view of the arm 10.

As described above, the present invention has a configuration in which a work machine attached to the abdomen is stored upward when not in use, and a lifting bracket 34 that is moved up and down by the rotation of the lifting arm 13 disposed on the machine body is fixed to the work machine side. In addition, a vertical stopper surface 34a is provided on the upper surface of the lifting bracket 34, which comes into contact with the machine frame 2 disposed in the longitudinal direction of the machine when the work machine is lifted by the lifting arm 13, so that the following effects can be achieved. It is something to do.

First, when the work equipment is stowed upwards and travels on the road, it is possible to store the work equipment close to it, which prevents noise from being generated by the vibration of the machine body, and also The cover of rotary mower A is not damaged by vibration, and it is now possible to drive on rough terrain with the work equipment attached.

Second, by providing the upper and lower stopper surfaces 34a on the lifting bracket 34, there is no need to provide a separate stopper, and the lifting bracket 34 can also serve as a stopper. Moreover, in the part of the lifting bracket 34,
Since the point of application of the lifting force when lifting by the lifting arm 13 is located, by providing a stopper at this point, it can be made to act most effectively as a stopper for rocking and rotation.

Thirdly, since slopes are provided that extend to the upper and lower stopper surfaces 34a of the lifting bracket 34 and engage with the side surfaces of the machine frame 2, the slopes of the left and right stopper surfaces 34b allow the rotary mower by the lifting arm 13 to As A rises, rotary mower A can be gradually moved to its normal position, and when it is finally engaged with the underside of the aircraft,
Since it is always placed in the correct position, a reliable storage state can be obtained.

[Brief explanation of drawings]

Fig. 1 is a side view of the rotary mower A attached to the abdomen of an agricultural tractor, Fig. 2 is a side view of the abdominal work equipment mounting device of the present invention, Fig. 3 is also a plan view, and Fig. 4 is a front view. , FIG. 5 is an enlarged side view of the diagonal link, FIG. 6 is an enlarged plan view, FIG. 7 is a side view of the lifting bracket, FIG. 8 is a rear view, and FIG. 9 is a front view of the lifting link 35. 10 is a plan view, FIG. 11 is a side view, FIG. 12 is a front view of the bracket 12, FIG. 13 is a side view, FIG. 14 is a side view of the L-shaped bolt, and FIG. 15 is a side view. is a side view of the J-shaped pin, FIG. 16 is a front sectional view of the lifting link 19, FIG. 17 is a side view of the same, FIG. 18 is a front view of the arm 10, and FIG.
The figure is also a side view. A... Rotary mower, B... Bevel gear box, 2... Body frame, 8, 9... Diagonal link, 11, 12... Bracket, 13... Lifting arm, 19, 35... Lifting link, 34...
... Lifting bracket, 34a... Upper and lower stopper surfaces, 34b... Left and right stopper surfaces.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a configuration in which a working machine attached to the abdomen is stored upward when not in use, the lifting bracket 34, which is moved up and down by the rotation of the lifting arm 13 disposed on the machine body side, is attached to the working machine. The upper and lower stopper surfaces 34a, which are fixedly installed on the sides and come into contact with the machine frame 2 disposed in the longitudinal direction of the machine when the work machine is lifted by the lifting arm 13, are connected to the lifting bracket 34.
A work equipment mounting device for an agricultural tractor, characterized in that it is provided on the top surface of the tractor. (2) Left and right stopper surfaces 34b are provided extending from the upper and lower stopper surfaces 34a of the lifting bracket 34 described in Claim 1 of the Utility Model Registration Claim and provided with inclined surfaces that contact the side surfaces of the fuselage frame 2. A work equipment mounting device for an agricultural tractor, characterized by: