JP7741567B2 - tillage equipment - Google Patents

Description

The present invention relates to a work machine, and in particular to a tillage device attached to the rear of the machine body.

A tillage device having a tillage body and a soil leveling body is known as a work device for tilling and leveling soil.

In this type of tillage equipment, workers may lift the soil leveling body upward to perform maintenance work, placing the tillage body in an open position.

The wider the leveling width of the leveling body, the heavier the body itself becomes, making it more difficult for workers to lift it.

After tilling, soil adheres to the soil leveling body, which adds to the weight of the soil, making it even more difficult to lift the body upwards.

Previously, maintenance work was performed by manually switching a lever on the assist mechanism to lock or unlock the operation of the assist mechanism.

However, if the operator neglects to switch the lever of the assist mechanism after use, the soil leveling body will not function properly during normal tilling work, and the soil leveling body will not be able to level the ground properly.
Therefore, after using the assist mechanism, the operator must always switch the lever, which is a cumbersome operation.

Patent No. 5902858

In light of the above background technology, the present invention aims to provide tillage equipment that reduces the burden of maintenance work on operators.

Another objective is to improve the efficiency of switching from a maintenance work state to a tillage work state.

In order to solve the above problems, the cultivator according to claim 1 of the present invention is a cultivator equipped with a cultivator body, and comprising: a leveling body that is provided behind the cultivator body in the traveling direction and is rotatable in the vertical direction; an arm whose base end is rotatably supported; a connecting rod whose one end is rotatably connected to the tip end of the arm and whose other end slides on the leveling body and is connected to the leveling body so as to be able to be engaged with the leveling body; an elastic body that can urge the arm in the traveling direction of the machine body to urge the leveling body upward via the connecting rod; The locking body is made up of a back portion having a back tip formed at its tip and a sloped surface continuing from the back tip, and a abdomen portion having a fitting groove formed on the opposite side of the back and having a abdomen tip formed at its tip, and the posture of the arm is changed to a fixed state or a rotatable state depending on the fitting position when the fitting groove of the locking body is fitted into the locking pin provided on the arm and a position other than the fitting position , and when the arm is in a rotatable state, the leveling body is in a state where it is pulled up by the connecting rod.
The tilling device according to claim 2 of the present invention is characterized in that in the tilling device according to claim 1, the arm is provided with a locking pin for switching the rotational position of the locking body.
The tilling device according to claim 3 of the present invention is the tilling device according to claim 1, characterized in that the elastic body is provided on a cover body that covers the top of the tilling body.

With the tillage equipment of the present invention, the rotational position of the locking body can be changed between the rotation-prevention position, the rotation-prevention position, and the rotation-enabling position with the assistance of an auxiliary mechanism, making it easier for workers to switch between maintenance work and tillage work, and also reducing the weight of the work required for workers to lift the soil leveling body, helping to prevent negligence.

During maintenance work, the worker only needs to raise or lower the leveling body, and there is no need for the worker to perform any switching operations, making it easier to switch between maintenance work and tilling work and preventing negligence in switching operations. Furthermore, since the hassle of switching operations such as unlocking is eliminated, the efficiency of switching from maintenance work to tilling work can be improved.

In addition, the elastic body, other elastic bodies, and position-changing locking bodies allow the worker to lift the leveling body with little force, reducing the burden on the worker when lifting or lowering the body.

1 is a front view showing an embodiment of a tilling implement according to the present invention. FIG. 2 is a plan view of FIG. 1; FIG. 2 is a left side view of FIG. 1 . FIG. 2 is a perspective view of FIG. 1; FIG. 2 is a VV end view of FIG. 1A is a cross-sectional view taken along line VI-VI in FIG. 1, and FIG. 1B is a cross-sectional view taken along line VII-VII in FIG. 1, both of which show the first step of the posture change by the hook (rotation-blocking posture). 7 is an end view taken along the line VII-VII of FIG. 1, showing a second step (rotation-blocking position) of the attitude change by the hook. 7 is an end view taken along the line VII-VII of FIG. 1, showing a third step (rotatable position) of the position change by the hook. FIG. 7 is an end view taken along line VII-VII of FIG. 1, showing a fourth step (rotatable position) of the position change by the hook. 7 is an end view taken along the line VII-VII of FIG. 1, showing a fifth step of the posture change by the hook (a posture preparing to prevent rotation); FIG. 7 is an end view taken along the line VII-VII of FIG. 1, showing a sixth step (rotation prevention preparation position) of the posture change by the hook. 12 is an enlarged view of a hook, showing the positional relationship with each part in FIGS. 6 to 11. FIG.

Next, the tilling equipment of the present invention will be described in more detail based on the drawings showing the embodiment. For convenience, parts that perform the same functions will be assigned the same reference numerals and their description will be omitted.

Reference numeral 1 denotes a tillage implement connected to the rear of a running machine body such as a tractor (not shown). Reference numeral 2 denotes the frame of the tillage implement 1, which collectively refers to the machine body frames such as the pipe frame 2a, front frame 2b, and rear frame 2c. The tillage implement 1 is connected to the running machine body via an attachment part 20 consisting of a top mast 21 with a top link pin 22 and a lower plate 23 with a lower link pin 24. Reference numeral 25 denotes an input case attached to the pipe frame 2a, which has an input shaft 25a. A transmission case 27 is attached to a side plate 26 attached to the end of the pipe frame 2a.

Reference numeral 3 denotes the tillage body, which consists of a rotor shaft 31 and multiple tillage tines 32 attached to the rotor shaft 31. The tillage tines 32 are bent to the right or left in the direction of travel A. Reference numeral 4 denotes a cover body that covers the top of the tillage body 3 and is fixed to the rear frame 2c and front frame 2b.

Reference numeral 5 denotes a leveling body consisting of a leveling board provided behind the tilling body 3, which is rotatably mounted on a hinge 51 provided on the rear frame 2c. Reference numeral 52 denotes a retaining plate which protrudes from the leveling body 5 and to which the tip of a connecting rod 74 (described below) is slidably engaged. Reference numeral 5a denotes an extension leveling board, and 53 denotes a bracket.

Reference numeral 6 denotes a pressure adjustment mechanism consisting of pressure adjustment rods 61; in the illustrated example, four are provided. One end of the pressure adjustment rod 61 is rotatably mounted on the pipe frame 2a, and the other end is slidably or engaged with a pressure adjustment rod holder 63 provided on the holder plate 52 so that pressure can be increased or decreased. Specifically, the pressure adjustment rod 61 has a restrictor 62 at one end and a pressure adjustment rod holder 63 at the other end, both perpendicular to the axis. A pressurizing elastic body 64 and a depressurizing elastic body 65 are axially attached to the front and rear of the pressure adjustment rod holder 63. The pressurizing elastic body 64 is slidable on the pressure adjustment rod 61. Reference numeral 61a denotes a fixing hole provided in the pressure adjustment rod 61, and 63a denotes a pin protruding from the pressure adjustment rod holder 63.

7 denotes an auxiliary mechanism consisting of an arm 72, a hook 73, a connecting rod 74, a first elastic body 75, a second elastic body 76, an upper stopper 77a, a lower stopper 77b, an upper locking pin 78a, and a lower locking pin 78b. The arm 72 has its base end rotatably mounted on a bracket 71 fixed to the pipe frame 2a, and the pressure adjustment rod 61 is rotatably attached to its tip.

The hook 73 is rotatably mounted on the bracket 71. The hook 73 consists of a back portion 73a and a body portion 73b, with a sloped surface formed on the back portion 73a and a mating groove 73e formed on the body portion 73b. The back portion 73a and the body portion 73b are continuous, with a first tip portion 73c pointed on the back portion 73a side and a second tip portion 73d pointed on the body portion 73b side. 73e is the mating groove formed in the second tip portion 73d, 73f is the base end of the hook 73, and 73g is the fulcrum of the hook 73. For stability and reliability of the rotational movement, in the illustrated example, a pair of the hooks 73 are mounted symmetrically on either side of the arm 72 in the direction of travel A.

The connecting rod 74 has one end rotatably connected to the arm 72 and the other end lockably connected to the bracket 53, allowing it to slide on the leveling body 5. 74a is a fulcrum that pivots the connecting rod 74 and the arm 72. 74b is a locking protrusion provided at the tip of the connecting rod 74, which is constantly in contact with the retaining portion 79.

The first elastic body 75 is a gas spring that is installed between the rear frame 2c and the arm 72 and urges the arm 72 in the traveling direction A. The second elastic body 76 is a coil spring that is attached to the bracket 71 and urges the hook 73 either upward or downward. To determine the rotation limit of the hook 73, an upper stopper 77a is provided on the bracket 71 located above the hook 73, and a lower stopper 77b is provided on the bracket 71 located below. In addition, to ensure that the rotational position of the hook 73 can be switched, an upper locking pin 78a is provided on the arm 72 located above the hook 73, and a lower locking pin 78b is provided on the arm 72 located below.

These components allow the rotational posture of the hook 73 to be changed. That is, when the hook 73 is in a lying position, i.e., when the second tip 73d abuts against the lower locking pin 78b and the abdomen 73b abuts against the lower stopper 77b, it forms the "rotation-blocking ready position" shown in Fig. 11. When the fitting groove 73e fits over the lower locking pin 78b and the lower stopper 77b abuts against the abdomen 73b, it forms the "rotation-blocking position" shown in Fig. 6. Furthermore, when the hook 73 is in an upright position, i.e., when the back 73a abuts against the upper stopper 77a and the abdomen 73b is free, it forms the "rotation-enabled position" shown in Fig. 8.
In the drawing, 80 is a lever.

Next, we will explain the operating procedure of the tilling device according to the present invention.

(1) Lifting Operation of the Ground Leveling Body The pin 63a of the pressure adjusting mechanism 6 is set to an automatic locking state, and then the lever 80 is pushed down.

Then, the tip 73c of the hook 73, which is biased by the second elastic body 76, stands up and rotates from the position shown in Figures 6 (A) and (B) to the position shown in Figure 8, so that the hook 73 takes on a "rotatable position."
That is, the hook 73 is turned upward by the second elastic body 76, and the back portion 73a comes into contact with either the upper stopper 77a or the upper locking pin 78a, and this state is maintained (FIG. 8). At this time, the abdomen portion 73b is free, and the arm 72 is thus in a rotatable state.

Next, the arm 72 generates a force to rotate in the direction of travel A due to the biasing force of the first elastic body 75, and the connecting rod 74, which is linked to this, also acquires a biasing force to rotate the ground leveling body 5 upward. When the worker rotates the ground leveling body 5 upward in this state, it will assume the position shown in Figure 9. Note that in this "rotatable position," the pressure adjustment rod 61 slides on the pressure adjustment rod holding portion 62 as the ground leveling body 5 rotates, regardless of the position of the hook 73. At this time, the connecting rod 74 does not slide on the ground leveling body 5, and the end of the connecting rod 74 always engages the ground leveling body 5.

Next, the worker raises the leveling unit 5. As the leveling unit 5 is constantly biased upward, it is pulled up by the locking protrusion 74b of the connecting rod 74.

In this state, the worker lifts the ground leveling unit 5. Because the ground leveling unit 5 is biased upward via the arm 72, connecting rod 74, and auxiliary mechanism holder 79, the worker can lift it easily, making the lifting operation easy.

As the leveling unit 5 continues to rotate upward from the position indicated by the two-dot chain line in Figure 10 to the position indicated by the solid line, the abutting upper locking pin 78a pushes the back 73a, causing the hook 73 to tip over. The abutment between the tip 73c and the pin changes from the tip 73c on the back 73a side to the tip 73d on the abdomen 73b side, and the tip 73d on the abdomen 73b side abuts the lower locking pin 78b (Figure 10).

At this time, the tip 73c of the hook 73 is forced downward by the second elastic body 76, causing it to rotate, and either the abdomen 73b comes into contact with the lower stopper 77b or the tip 73d on the abdomen side comes into contact with the lower locking pin 78b, thereby assuming a "rotation prevention preparation position" (Figure 10).

Even when the ground leveling unit 5 is in this rotation-blocking preparation position, the first elastic body 75 continues to apply a biasing force to the ground leveling unit 5. This allows the worker to lift the ground leveling unit 5 with little force.

When the ground leveling unit 5 is further rotated upward and reaches a predetermined rotation angle, the pin 63a of the pressure adjustment mechanism 6 automatically fits into the fixing hole 61a of the pressure adjustment rod 61, ending the rotation of the ground leveling unit 5 and fixing the position of the ground leveling unit 5 to a "fixed position." At this time, the lower stopper 77b of the hook 73 abuts against the abdomen 73b, and the abdomen-side tip 73d is separated from the lower locking pin 78b, but the hook 73 maintains its rotation-prevention position (Figure 11).

In the rotation prevention preparation position, the second tip 73d may be either separated from the lower locking pin 78b (FIG. 11) or in contact with the lower locking pin 78b (FIG. 10).
When the ground leveling unit 5 is rotated upward and the arm 72 rotates as shown by the two-dot chain line in Figure 10, the lower locking pin 78b moves relatively while abutting from the second tip 73d toward the first tip 73c. As the ground leveling unit 5 continues to rotate upward, as shown in Figure 11, the abdomen 73b abuts against the lower stopper 77b, restricting the rotation of the hook 73. However, since the arm 72 continues to rotate due to the biasing force applied in conjunction with the ground leveling unit 5, the second tip 73d moves away from the lower locking pin 78b. In this way, the rotation prevention ready position does not depend on the abutment state between the second tip 73d and the lower locking pin 78b.

(2) Lowering of the Ground Leveling Body First, the pin 63a of the pressure adjusting mechanism 6 is released from the fixing hole 61a of the pressure adjusting rod 61, allowing the ground leveling body 5 to rotate. At this time, the hook 73 remains in the "rotation prevention preparation position" (Fig. 11).

While supporting the ground leveling unit 5 from below, the worker rotates the ground leveling unit 5 downward from the position shown by the solid line in Figure 11 to the position shown by the solid line in Figure 10. At this time, the biasing force of the first elastic body 75 is applied to the ground leveling unit 5 via the arm 72, connecting rod 74, etc., so the worker can work without supporting the entire weight of the ground leveling unit 5.

As the leveling body 5 rotates downward, the arm 72 moves in conjunction, and the upper end of the arm 72 rotates rearward in the direction of travel A from the position shown by the two-dot chain line in Figure 10 to the position shown by the solid line.

At the same time, the lower locking pin 78b pushes up the tip 73d of the hook 73, causing the contact position of the tip 73c to move slightly downward from the position shown in Figure 11 to the position shown in Figure 10.

6(A) and (B), the lower locking pin 78b fits into the fitting groove 73e of the hook 73, causing the hook 73 to assume a "rotation-blocking position," blocking the biasing force of the first elastic body 75 against the arm 72. This ends the auxiliary biasing of the first elastic body 75 against the ground leveling body 5, and the machine automatically transitions to a normal operating state.
Furthermore, in the "rotation prevention preparation position" shown in Figure 10, the leveling body 5 is constantly being urged and assisted, so the leveling body 5 can be freely rotated vertically while maintaining the assisted state.

When the hook 73 assumes the rotation-blocking position, the first elastic body 75 releases the auxiliary force applied to the soil leveling unit 5, and the soil leveling unit then returns to its normal state, where no force is applied even if the soil leveling unit is rotated upward. Plowing work can be performed in this normal state.

(3) During normal tillage work, with the soil leveling unit 5 lowered to its lowest position, the hook 73 is placed in the rotation-preventing position, and the rotation of the arm 72 is fixed (Fig. 6). At this time, the biasing force of the first elastic body 75 against the soil leveling unit 5 is released.

The soil leveling body 5 rises relative to the frame 2, tillage body 3, and upper cover body 4 depending on the soil properties.

Because the ground leveling body 5 is not biased upward by the first elastic body 75, it is possible to level the ground by applying appropriate ground contact pressure to the soil (Figure 7).

The pressure adjustment rod holder 63 allows the pressure adjustment rod 61 to slide freely, so the leveling body 5 can rotate freely up and down without being hindered, allowing it to level the ground so that it follows the ground.

Here, the rotational position of the hook will be defined.
The "rotatable position" refers to a state in which the first tip 73c and the second tip 73d of the hook 73 are raised upward, and the upper locking pin 78a and the lower locking pin 78b are not in contact with the back 73a and the abdomen 73b, allowing the arm 72 to rotate (Figures 8 and 9).
The "rotation prevention preparation position" refers to a state in which the first tip 73c and the second tip 73d of the hook 73 are lowered downward and the arm 72 is capable of rotation, i.e., a state in which the lower locking pin 78b is not locked in the mating groove 73e, and also includes a fixed state in which the rotation of the leveling body 5 is fixed upward by the pin 63a of the pressure adjustment mechanism 6 (Figures 10 and 11).
The "rotation-preventing position" refers to a state in which the first tip 73c and the second tip 73d of the hook 73 are lowered downward, the lower locking pin 78b is locked in the mating groove 73e, and the rotation of the arm 72 is fixed (Figures 6 and 7).

The posture and state of the leveling body 5 are defined as follows:
The "fixed position" refers to a state in which the pin 63a of the pressure adjusting mechanism 6 is fitted into the fixing hole 61a, thereby making it impossible (fixed) for the ground leveling body 5 to rotate. In other words, it is not directly related to the position of the hook 73.
The "working state" refers to a state in which there is no biasing force on the soil leveling body 5, that is, the hook 73 is in a "rotation-preventing position" and normal tilling work can be performed.
The "auxiliary state" refers to a state in which the leveling body 5 is biased, that is, the hook 73 is in a "rotatable position" or "rotation prevention preparation position" and maintenance work can be performed.

The tillage equipment of the present invention is not limited to the above-described embodiment. For example, while two first elastic bodies 75 are shown in the illustrated example, they may be a single body or, if multiple, any number of bodies may be used. Similarly, while two second elastic bodies 76 are shown in the illustrated example, they may be a single body or, if multiple, any number may be used. While two hooks 73 are shown in the illustrated example, they may be a single body or, if multiple, any number may be used. If there are multiple hooks 73, first elastic bodies 75, and second elastic bodies 76, even if the dimensions of each component are reduced, the strength of the auxiliary mechanism 7 as a whole is ensured when the hook 73, which fixes the position of the soil leveling body 5, is in the rotation-blocking position, ensuring reliable maintenance of the position. Furthermore, deformation and damage are unlikely to occur even with repeated use, ensuring stable operation.

Furthermore, the lower stopper 77b can be eliminated by increasing the contact distance between the second tip 73d and the first tip 73c. In this case, in the rotation prevention preparation position, the lower locking pin 78b is always in contact with the second tip 73d through the first tip 73c. In this configuration, although it is necessary to increase the distance between the second tip 73d and the first tip 73c, the elimination of the lower stopper 77b reduces the number of components in the entire mechanism, thereby simplifying it.
On the other hand, in the embodiment described herein, the distance between the second tip 73d and the first tip 73c, which the sliding lower locking pin 78b slides in contact with, can be set to be short, so that the protruding distance forward from the arm 73 can be shortened in the rotation-blocking posture, thereby preventing the operator from accidentally getting caught on the first tip 73c.

This invention can be used in agricultural work, etc.

DESCRIPTION OF SYMBOLS 1 Tillage implement 2 Frame 2a Pipe frame 2b Front frame 2c Rear frame 20 Mounting portion 21 Top mast 22 Top link pin 23 Lower plate 24 Lower link pin 25 Input case 25a Input shaft 26 Side plate 27 Transmission case 3 Tillage body 31 Rotor shaft 32 Tillage tines 4 Cover body 5 Leveling body 5a Extension leveling plate 51 Hinge 52 Holding plate 53 Bracket 6 Pressure regulating mechanism 61 Pressure regulating rod 61a Fixing hole 62 Regulating body 63 Pressure regulating rod holding portion 63a Pin 64 Pressurizing elastic body 65 Depressurizing elastic body 7 Auxiliary mechanism 71 Bracket 72 Arm 73 Hook 73a Back portion 73b Belly portion 73c First tip portion 73d Second tip portion 73e Fitting groove 73f Base end portion 73g Fulcrum 74 Connecting rod 74a Fulcrum 74b Locking protrusion 75 First elastic body 76 Second elastic body 77a Upper stopper 77b Lower stopper 78a Upper locking pin 78b Lower locking pin 79 Holding portion 80 Lever

Claims (3)

A tillage device having a tillage body,
A vertically rotatable soil leveling body provided behind the direction of travel of the tilling body;
an arm whose base end is rotatably supported;
a connecting rod whose one end is rotatably connected to the tip of the arm and whose other end slides on the leveling body and is connected to the leveling body so as to be able to be locked;
an elastic body that can urge the arm in the traveling direction of the machine body to urge the ground leveling body upward via the connecting rod;
a rotatable locking body interlocked with the arm, the locking body comprising a back portion having a back tip portion formed at a tip end thereof and a sloped surface formed continuous with the back tip portion, and a abdomen portion having a fitting groove formed on the opposite side of the back portion and having an abdomen tip portion formed at a tip end thereof;
The posture of the arm is changed between a fixed state and a rotatable state depending on whether the locking position is a locking position when the engagement groove of the locking body is fitted onto a locking pin provided on the arm or a position other than the locking position ,
A tilling device characterized in that when the arm is in a rotatable state, the ground leveling body is in a state of being pulled up by a connecting rod. The tillage device described in claim 1, characterized in that the arm is provided with a locking pin that switches the rotational position of the locking body. 2. The tilling implement according to claim 1, wherein the elastic body is provided on a cover body that covers the top of the tilling implement.