JPH0528962Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a leveling device for the surface of cultivated soil in agricultural tractors and the like.

(Prior art) Conventionally, as shown in FIG.
A mold-shaped support plate F is fixed to the side plate E of the upper cover D surrounding the upper part of the crushing rotor J,
The front end of an arm H is rotatably attached to the gap between the support plate F and the side plate E by a shaft G, and the rear end of the arm H is attached with a mounting shaft C in the left-right direction of the rear cover B. A device for leveling the surface of cultivated soil in an agricultural tractor or the like is known, in which a spring I is attached between the rear cover B and the arm H to urge the rear cover B to rotate downward.

(Problems to be Solved by the Invention) The rear cover B of the above-mentioned known example is attached to the upper cover D on both left and right sides via a rotatable arm H. It has a structure that allows it to freely swing from side to side (a structure that swings around the front and rear directions), and even when the agricultural tractor tilts from side to side depending on the unevenness of the field, it maintains a horizontal state independently of the movement of the agricultural tractor. Although the soil crushing rotor J can level the crushed soil horizontally in the field, it is not possible to keep the rear cover B in a fixed state where it does not swing from side to side.

(Means for Solving the Problems) The present invention provides a leveling device 13 that includes a crushing rotor 19, an upper cover 14 above the rotor, a transmission 15, a rear cover 20 provided at the rear of the upper cover 14, and the like. Mounting shafts 21 extending in the left-right direction are provided on both left and right sides of the mounting shaft 21, and the mounting shafts 21 are rotatably fixed to the rear sides of a pair of left and right support plates 24, and the front sides of the pair of support plates 24 are attached to the upper part of the support plates 24. A fixed use state in which the cover 14 is fixed to the left and right side plates 23 by two bolts 28 and 29, making it impossible to swing the rear cover 20 left and right; This device is a leveling device for leveling the surface of cultivated soil in an agricultural tractor or the like, and is configured to be installed in two modes: a movable usage state in which the rear cover 20 is freely fixed and allows the rear cover 20 to swing left and right.

(Example) An example of the present invention will be described with reference to the drawings. 1 is an agricultural tractor, with front wheels (not shown) and rear wheels 2.
A so-called three-point link mechanism 3 is provided at the rear of the agricultural tractor 1. The three-point link mechanism 3 includes an upper link 4, a lower link 5, a lift arm 6,
It is formed from rod 7 etc. 8 is a mounting rod, 9 is a support rod, 10 is an arm, 11 is a rod, and 12 is a PTO projecting rearward from the rear of the agricultural tractor 1.
It is the axis.

13 is a rice field leveling device that is attached to the rear of the agricultural tractor 1, and has a horizontally (left and right) long upper cover 1.
4, and the upper center of the upper cover 14 has the above-mentioned
A transmission 15 is provided which is connected to the PTO shaft 12 via a flexible wire shaft. Horizontal transmission cases 16, 16 are provided on the left and right sides of the transmission 15. A mounting plate 1 is attached to the horizontal transmission cases 16, 16.
7 and 17 are respectively fixed, and the rear end portion of the mounting rod 8 is fixed to the upper part of the mounting plates 17 and 17.

A vertical power transmission case 18 is provided at the end of one of the horizontal transmission cases 16 . A known crushing rotor 19 having a large number of crushing blades radially attached is provided below the upper cover 14, and power is transmitted to the crushing rotor 19 via a vertical power transmission case 18.

At the rear of the upper cover 14, a laterally long rear cover 20 is provided. rear cover 2
Mounting shafts 21 extending in the left-right direction are provided at the upper end portions of both the left and right sides of 0.

24 is a pair of left and right support plates, each support plate 24
An upper mounting hole 25 and a lower mounting hole 26 are formed on the front side, and a mounting shaft 2 of the rear cover 20 is formed on the rear side.
An insertion hole 27 is formed through which the material 1 is inserted.

Each support plate 24 has a bolt 28 and a bolt 29
It is fixed to the side plate 23 of the upper cover 14 by
When attaching the rear cover 20 so that it can swing from side to side (swinging motion with the front and back direction as the axis), only one bolt 28 is inserted through the upper mounting hole 25 so that each support plate 24 can be freely rotated to the side plate 23. When using the rear cover 20 in a fixed state with the rear cover 20 unable to swing left and right, use the two bolts 28, 2.
9 are inserted into the upper mounting hole 25 and the lower mounting hole 26 to fix each support plate 24 to the side plate 23 in a non-rotatable manner.

Reference numeral 30 denotes a vertical rod provided substantially at the center of the left and right sides of the rear cover 20, and the vertical rod 30 is rotatably attached to the rod 11 via an arm 31. The arm 31 is attached to a horizontal shaft 33 whose both ends are fixed to the mounting plates 17, 17. 32 is an aileron.

(effect) Next, we will discuss the effect.

When the tractor 1 is operated to pull the rice field leveling device 13, the rotation of the output shaft 12 enters the transmission case 15, passes through the horizontal transmission case 16 and the vertical power transmission case 18, rotates the crushing rotor 19, and crushes the soil in the field. Then, it is leveled using the rear cover 20.

During the above operation, the upper mounting hole 25 of the support plate 24 is
If the support plate 24 is rotatably attached to the side plate 23 of the upper cover 14 by inserting the bolts 28, even if the tractor 1 tilts to the left or right due to unevenness in the field, the rear cover 20 will remain in place. It is maintained in a nearly horizontal state independently of the movement of the tractor 1, and the field can be leveled. That is, when the tractor 1 tilts from side to side, one side of the left and right sides of the rear cover 20 comes into strong contact with the field, so a strong force pushing upward is applied to one side of the rear cover 20, and this force is applied to the mounting shaft on one side of the rear cover 20. It acts on the support plate 24 on one side via 21. Then, the support plate 24 rotates around the bolt 28, allowing the rear cover 20 to move upward on one side, and the rear cover 20 eventually returns to a nearly horizontal state independent of the movement of the tractor 1. swing like this. In this way, when different magnitudes of force are applied to the left and right sides of the rear cover 20 due to contact with the field, the rear cover 20 can swing left and right to absorb this force.

Therefore, when the rear cover 20 is used in a fixed state without swinging, the support plate 20 is simply
When the bolt 29 is inserted into the remaining lower mounting hole 26 and fixed to the side plate 23 with the two bolts 28 and 29, the support plate 24 becomes unable to rotate, so the rear cover 20 does not swing and can be easily switched. can be used.

(Effects) As described above, conventionally, a mold-shaped support plate F is fixed to the side plate E of the upper cover D surrounding the upper part of the crushing rotor J of the rice field leveling apparatus A, and the support plate F and An arm H is attached to the gap between the side plate E and the shaft G.
The front end of the arm H is rotatably attached, and the left-right mounting shaft C of the rear cover B is attached to the rear end of the arm H.
A leveling device for leveling the surface of cultivated soil in an agricultural tractor or the like is known in which a spring I is attached between the support plate F and the arm H to urge the rear cover B to rotate downward.

The rear cover B of the above-mentioned known example is attached to the upper cover D on both left and right sides via rotatable arms H, so that it can swing left and right with respect to the agricultural tractor (crushing rotor J) (in the front and back directions). Even when the agricultural tractor tilts left and right depending on the unevenness of the field, it maintains a horizontal state independently of the movement of the agricultural tractor, and the soil crushed by the soil crushing rotor J is Although it is possible to level the rear cover B horizontally, it is not possible to keep the rear cover B in a fixed state where it does not swing from side to side.

However, in the present invention, in a leveling device 13 that includes a crushing rotor 19, an upper cover 14 thereof, a transmission 15, a rear cover 20 provided at the rear of the upper cover 14, etc., attachments extending in the left-right direction are provided on both left and right sides of the rear cover 20. A shaft 21 is provided, and the mounting shaft 21 is rotatably fixed to the rear side of a pair of left and right support plates 24, and the front side of the pair of support plates 24 is attached to the left and right side plates 23 of the upper cover 14. A fixed use state in which the rear cover 20 is fixed unrotatably by the bolts 28 and 29, making it impossible to swing the rear cover 20 left and right; Since this device is a leveling device for the surface of cultivated soil on an agricultural tractor, etc., which is configured to be installed in two modes, i.e., in a movable usage state that allows left and right swinging, it is a simple method of using two bolts 28 and 29 properly. Thus, it is possible to easily obtain two modes: a fixed usage state in which the rear cover 20 cannot be swung left and right, and a movable usage state in which the rear cover 20 can be swung left and right.

[Brief explanation of drawings]

FIG. 1 is a side view, FIG. 2 is a rear view, FIG. 3 is a perspective view of essential parts, FIG. 4 is a diagram showing how the support plate is attached, and FIG. 5 is a diagram of a known example. Explanation of symbols, 1... Agricultural tractor, 2... Rear wheel, 3... Three-point link mechanism, 4... Upper link, 5... Lower link, 6... Lift arm,
7... Rod, 8... Mounting rod, 9... Support rod, 1
0... Arm, 11... Rod, 12... PTO
Shaft, 13...Paddy leveling device, 14...Top cover, 15...Mission, 16...Horizontal transmission case, 17...Mounting plate, 18...Vertical power transmission case, 19...Soil crushing rotor, 20... ... Rear cover, 21 ... Mounting shaft, 23 ... Side plate, 24 ... Support plate, 25 ... Upper mounting hole, 26 ... Lower mounting hole, 27 ... Insertion hole, 28 ... Bolt, 29 ...
Bolt, 30... Vertical rod, 31... Arm, 32...
...Ailerons, 33...Horizontal axis.

Claims (1)

[Scope of utility model registration request] A crushing rotor 19 and an upper cover 14 above it
In the leveling device 13, which includes a transmission 15, a rear cover 20, etc. provided at the rear of the upper cover 14, mounting shafts 21 extending in the left-right direction are provided on both left and right sides of the rear cover 20, and the mounting shafts 21 have a pair of left and right mounting shafts. The support plates 24 are rotatably fixed to the rear sides thereof, and the front sides of the pair of support plates 24 are attached to the left and right side plates 23 of the upper cover 14 with two bolts 28,
29, the rear cover 2 is fixed unrotatably.
A fixed use state that disables left and right swing of 0,
The leveling of the cultivated soil surface in an agricultural tractor or the like configured to be mounted in two modes: a movable operating state in which the rear cover 20 is rotatably fixed by one of the bolts 28 and 29 and the rear cover 20 can be swung left and right. Flat device.