JP6951499B2 - Tillage work machine - Google Patents

Description

The present invention relates to a tilling work machine for tilling by rotationally driving a tilling claw portion.

The above-mentioned tillage work machine is provided with a cultivating claw portion that can be driven to rotate and a cover that covers the upper side and the rear side of the cultivating claw portion. The soil in the field is scraped up and cultivated (see, for example, Patent Document 1). Such a tilling work machine is used, for example, by being mounted on a rear portion of a tractor or the like so as to be able to move up and down.

The tilling work machine described in Patent Document 1 is provided with an upper cover that covers the upper part of the tilling claw portion and a rear cover that is supported by a rear end portion of the upper cover so as to be swingable up and down. .. An elastic body is provided inside the upper cover and the rear cover from the front end portion of the upper cover to the rear end portion of the rear cover.

For example, in mountainous areas, there may be many stones in the field. In such a case, the stones will be scraped up together with the soil at the tillage claws, and the scraped stones will scatter from the tillage claws and collide with the cover, etc., damaging the cover, etc. There is a risk that it will end up.

Therefore, in the tilling work machine described in Patent Document 1, the stone that is scooped up by the tilling claw portion is located between the rotation locus of the tilling claw portion and the elastic body at the rear end portion of the upper cover. It is equipped with a protector member that blocks passage.

Jikkenhei 5-290302 Gazette

In the above-mentioned tilling work machine, the field is leveled by pressing the soil cultivated at the tilling claw portion at the lower portion of the rear cover. At this time, if a part of the soil scraped up by the cultivated claws can be supplied to the position where it was cultivated or to the front side of the cultivated claws, the soil can be cultivated again to improve the soil crushing performance. Can be improved. Therefore, when the cultivated soil is pressed at the lower portion of the rear cover, the sufficiently cultivated soil can be pressed, so that the surface of the field can be made a clean flat surface. Therefore, it is desired that a part of the soil scraped up by the cultivated claw portion can be positively supplied to the scraped position and the front side of the cultivated claw portion.

When the soil scraped up by the tilling claw portion is supplied to the front side, the soil is supplied to the front side through the gap formed between the rotation locus of the tilling claw portion and the cover. Therefore, in order to meet the above-mentioned request, in the gap between the rotation locus of the tillage claw and the cover, the soil that has been scraped up by the tillage claw is positively scraped up from the position or the tillage claw. It is also necessary to provide a configuration for supplying to the front side.

In the tillage work machine described in Patent Document 1, when soil is supplied to the front side through the gap between the rotation locus of the tillage claw portion and the cover, the soil is supplied to the front side in the rotation region of the tillage claw portion, and is rearward or diagonally upward. The space between the rotation locus of the tillage claw and the cover on the side corresponds to the entrance of the soil to the gap. However, the distance between the entrances is smaller than that on the downstream side in the rotation direction of the tillage claws, and the soil scooped up by the tillage claws does not easily enter the gaps. ..

Therefore, it is conceivable to increase the distance between the rotation locus of the tilling claw portion and the cover portion at the portion corresponding to the entrance portion of the scraped soil to the gap portion. However, the larger the distance between the entrances, the easier it is for stones to enter between the rotation locus of the tillage claw and the cover. Therefore, if the distance between the rotation locus of the tillage claw and the cover is increased, the cover The problem of damage is exacerbated.

Further, in the tilling work machine described in Patent Document 1, the distance between the rotation locus of the tilling claw and the gap between the cover is from the entrance of the soil scraped up by the tilling claw to the tilling claw. It gradually increases in the direction of rotation, and the distance between the rotation locus of the tillage claw and the cover is maximized at the front end of the rear cover (the portion corresponding to the swinging fulcrum of the rear cover). Then, the distance between the rotation locus of the tillage claw and the cover is sharply reduced in the portion adjacent to the downstream side in the rotation direction of the tillage claw with respect to the maximum portion.

As described above, in the tilling work machine described in Patent Document 1, the distance between the rotation locus of the tilling claw and the cover changes abruptly, so that even if soil enters the entrance side of the gap. , It is difficult to guide the soil smoothly to the front side. In particular, between the rotation locus of the tillage claw and the cover in the portion adjacent to the downstream side in the rotation direction of the tillage claw with respect to the portion where the gap between the rotation locus of the tillage claw and the cover is maximized. Since the gap between the two is rapidly decreasing, there is a possibility that the soil will stay in this area and it will not be possible to move the soil to the front side. Moreover, since the protector member is arranged at a portion where the gap between the rotation locus of the tillage claw and the cover is sharply reduced, the protector member greatly hinders the movement of the soil to the front side. There is a possibility.

In view of this situation, the main problem of the present invention is that the soil that has been scraped up by the tillage claw can be supplied to the position where the soil is actively scraped up or to the front side of the tillage claw, but foreign matter such as stones. The point is to provide a tillage work machine capable of preventing collision with the cover and preventing damage to the cover.

The present invention is provided with a cover that covers the upper side and the rear side of the cultivated claw portion in a state where a gap portion is formed between the cultivated claw portion that can be driven to rotate and the rotation locus of the cultivated claw portion. In the gap portion, in the rotation region from the rear side to the upper side of the cultivated claw portion, the distance between the rotation locus of the cultivated claw portion and the cover gradually decreases in the rotation direction of the cultivated claw portion. Equipped with a change part,
An intermediate portion of the interval changing portion is provided with a protruding portion that protrudes from the cover side to the rotation locus side of the tilling claw portion in a state of being spaced apart from the rotation locus of the tilling claw portion.
Inside the cover, a seat body is provided in a posture along the inner surface portion of the cover, a support for fixing the seat body to the cover is provided, and the protruding portion is provided on the support body.
As the seat body, a front side seat body arranged on the front side of the cover and a rear side seat body arranged on the rear side of the cover are provided.
It is preferable that the support is for fixing both the front seat body and the rear seat body to the cover.

According to this configuration, when the soil scraped up by the tillage claw portion is supplied to the front side, the soil is supplied to the front side through the interval changing portion provided in the rotation region from the rear side to the upper side of the tillage claw portion. Can be supplied to. Then, in the interval changing portion, the distance between the rotation locus of the tillage claw and the cover gradually decreases in the rotation direction of the tillage claw, so that the distance between the rotation locus of the tillage claw and the cover suddenly decreases. The soil scraped up by the tilling claws can be smoothly guided to the front side without changing. Moreover, in the interval changing portion, the distance between the rotation locus of the tilling claw portion and the cover can be made larger in the upstream portion in the rotation direction of the tilling claw portion than in the downstream portion in the rotation direction of the tilling claw portion. .. As a result, the distance between the rotation locus of the tillage claw and the cover at the entrance of the interval change portion can be increased, and the soil scraped up by the tillage claw can be positively entered into the gap. Can be done. In this way, by providing the interval changing portion, the soil scraped up by the tilling claw portion can be positively supplied to the scraped position and the front side of the tilling claw portion.

In addition, while providing an interval changing part for positively supplying the soil scraped up by the tillage claw part to the front side, by providing a protruding part in the middle part of the interval changing part, the entrance of the gap changing part is provided. Even if foreign matter such as stones enters the downstream side of the cultivated claw in the rotation direction from the part side, the protruding part can appropriately prevent the cultivated claw from entering the downstream side in the rotation direction. can. Therefore, the soil that has been scraped up by the tillage claws can be supplied to the position where it was actively scraped up and to the front side of the tillage claws, while preventing the cover from colliding with foreign matter such as stones and the cover. Damage can be prevented.
According to this configuration, since the support for fixing the seat body to the cover is provided with a protruding portion, the support can also function as the protruding portion, and the configuration can be simplified by combining the configurations. can.

The present invention relates to the distance between the rotation locus of the tilling claw portion and the cover in the gap portion.
The distance between the rotation locus of the tilling claw portion and the cover at the front end portion of the cover is K1.
The distance between the rotation locus of the tilling claw portion and the cover at the uppermost portion of the cover is K2.
The distance between the rotation locus of the tillage claw and the protrusion is K3.
When the distance between the rotation locus of the tilling claw portion and the cover at the rear end portion of the interval changing portion is K4,
It is preferable that it is configured so as to satisfy the relational expression of K4>K1≈K2> K3.

According to this configuration, the tillage claw portion is formed by increasing the distance K4 between the rotation locus of the tillage claw portion and the cover at the rear end portion of the interval change portion corresponding to the entrance portion side of the interval change portion. The soil scraped up in the above can be positively supplied to the inlet side of the interval changing portion, and a sufficient amount of soil can be supplied to the front side through the interval changing portion. Moreover, K3, which is the distance between the rotation locus of the cultivated claw and the protruding portion, is K1 which is the distance between the rotation locus of the cultivated claw and the cover at the front end of the cover, and K1 and the top of the cover. By making it smaller than K2, which is the distance between the rotation locus of the tilling claw portion and the cover, it is possible to appropriately prevent foreign matter such as stones from entering the front end portion of the cover and the uppermost portion of the cover. Therefore, it is possible to appropriately prevent foreign matter such as stones from getting caught between the cover and the tilling claw portion at the front end portion of the cover and the uppermost portion of the cover, and it is possible to appropriately prevent the cover from being damaged.

In the present invention, the distance between the rotation locus of the tilling claw portion and the cover at the uppermost portion of the cover is K2.
When the distance between the rotation locus of the tilling claw portion and the protruding portion is K3,
It is preferable that it is configured so as to satisfy the relational expression of K2>K3> K2 / 2.

According to this configuration, K3, which is the distance between the rotation locus of the cultivated claw and the protrusion, is smaller than K2, which is the distance between the rotation locus of the cultivated claw and the cover at the top of the cover. However, it is possible to secure a larger interval than K2 / 2. As a result, while it is possible to appropriately prevent foreign matter such as stones from entering the uppermost part of the cover, soil can be supplied to the downstream side in the rotation direction of the tilling claw part from the protruding part, and the soil can be scratched by the tilling claw part. The fried soil can be positively supplied to the front side of the tillage claw.

In the present invention, it is preferable that the protruding portion is provided with an inclined portion that is closer to the rotation locus side of the cultivated claw portion toward the downstream side in the rotation direction of the cultivated claw portion.

According to this configuration, when a foreign substance such as a stone enters the gap changing portion, the foreign matter collides with the inclined portion and is dropped downward. Since the inclined portion has an inclined shape that approaches the rotation locus side of the cultivated claw portion toward the downstream side in the rotation direction of the cultivated claw portion, the foreign matter is not repelled to the upstream side in the rotation direction of the cultivated claw portion. , Foreign matter can be smoothly dropped to the lower side. As a result, foreign matter that is prevented from entering the downstream side of the tillage claw in the rotational direction at the protruding portion is less likely to interfere with the movement of the soil to the front side, and the soil that has been scraped up by the tillage claw is removed. It can be smoothly moved to the downstream side in the rotation direction of the tillage claw portion rather than the protruding portion.

The present invention is provided with a cover that covers the upper side and the rear side of the cultivated claw portion in a state where a gap portion is formed between the cultivated claw portion that can be driven to rotate and the rotation locus of the cultivated claw portion.
In the gap portion, in the rotation region from the rear side to the upper side of the tillage claw portion, the distance between the rotation locus of the tillage claw portion and the cover gradually decreases in the rotation direction of the tillage claw portion. Equipped with an interval change part,
An intermediate portion of the interval changing portion is provided with a protruding portion that protrudes from the cover side to the rotation locus side of the tilling claw portion in a state of being spaced apart from the rotation locus of the tilling claw portion.
Inside the cover, a seat body is provided in a posture along the inner surface portion of the cover, a support for fixing the seat body to the cover is provided, and the protruding portion is provided on the support body.
As the seat body, a front side seat body arranged on the front side of the cover and a rear side seat body arranged on the rear side of the cover are provided.
The front side seat body is sandwiched between the support body and the fastening portion for fixing the rear side seat body to the cover by being fastened together with the rear side seat body by a fastening member. A sandwiching portion for fixing the front seat body to the cover is provided.
It is preferable that the sandwiching portion is extended in the support so as to be folded back from the end of the protruding portion on the side approaching the rotation locus of the tilling claw portion to the side approaching the cover.

According to this configuration, the rear seat body can be appropriately fixed to the cover by the fastening portion provided on the support, and the front seat body can be appropriately fixed to the cover by the sandwiching portion provided on the support. Can be fixed. As a result, both the rear seat body and the front seat body can be appropriately fixed to the cover simply by providing the support, and the configuration can be simplified. Moreover, since the sandwiching portion is extended in a state of being folded back from the end on the side approaching the rotation locus of the tilling claw portion in the protruding portion to the side approaching the cover, the rigidity of the protruding portion can be increased. The durability of the protruding portion can be improved.

The first feature configuration of the present invention is a rotary-driven tillage claw portion and
An upper cover that covers the upper side of the tillage claw portion and
A rear cover that covers the rear side of the tillage claw portion is provided.
The upper cover is characterized in that a projecting portion is provided so as to project from the upper cover side to the rotation locus side of the tilling claw portion.

The second characteristic configuration of the present invention is characterized in that the protruding portion is provided with an inclined portion that approaches the rotation locus side of the tilling claw portion toward the downstream side in the rotation direction of the tilling claw portion. It is in.

The third characteristic configuration of the present invention is that the inclined portion is provided over the entire length of the upper cover in the lateral width direction.

The fourth characteristic configuration of the present invention is that the rear cover is rotatably configured around an axis serving as a rotation fulcrum provided in the front portion of the rear cover.
The inclined portion is characterized in that it is provided on the downstream side in the rotation direction of the tilling claw portion with respect to the axial center serving as a rotation fulcrum.

The fifth characteristic configuration of the present invention is that the support portion of the inclined portion is provided on the upstream side in the rotation direction of the tilling claw portion with respect to the inclined portion.

Side view with the tillage work machine attached to the rear of the tractor Perspective view of the tillage work machine Side view of the tillage work machine Side view of the main part of the tillage work machine Perspective view showing the installation state of the support in the tilling work machine Enlarged cross-sectional view of the part where the seat body is fixed to the cover with the support

An embodiment of a tillage work machine according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the tilling work machine 10 is configured to be freely mounted on the rear portion of the tractor 1. The front portion of the vehicle body portion 2 of the tractor 1 is supported by a pair of left and right front wheels 3, and the rear portion of the vehicle body portion 2 is supported by a pair of left and right rear wheels 4. The rear part of the vehicle body portion 2 of the tractor 1 is provided with a three-point link mechanism including a pair of left and right lower links 5 and an upper link 6, and the tilling work machine 10 is freely mounted on the three-point link mechanism. .. Incidentally, the tilling work machine 10 can be mounted not only directly on the three-point link mechanism but also on the three-point link mechanism via, for example, a hitch member formed in a triangular shape. The rear part of the vehicle body portion 2 of the tractor 1 is provided with an elevating device (not shown) having a hydraulic device such as an elevating cylinder, and the cultivating work machine 10 is raised and lowered by the elevating device to raise and lower the three-point link mechanism. It is configured to move up and down.

As shown in FIGS. 2 and 3, the tilling work machine 10 includes a pair of left and right lower connecting portions 11 for connecting to the lower link 5 and the like, and an upper connecting portion 12 for connecting to the upper link 6 and the like. And are provided. The lower connecting portion 11 is formed of a plate-like body extending in the front-rear direction, and a lower link 5 or the like is freely connected to the front end portion thereof. The upper side connecting portion 12 is configured such that two plate-shaped bodies are spaced apart from each other, and an upper link 6 or the like is freely connected to the front end portion thereof.

The tilling work machine 10 includes a gear unit 13 provided at the rear of the tractor 1 for receiving input from the PTO shaft, a rotary-driven tilling claw portion 14, and a cover covering the upper side and the rear side of the tilling claw portion 14. 15 and are provided.

The gear unit 13 is arranged at the center of the pipe case 16 extending over the entire length of the tilling work machine 10 in the lateral width direction. The gear unit 13 is configured to rotationally drive the drive shaft housed in the pipe case 16 to transmit the rotational driving force input from the PTO shaft to the transmission case 17. The transmission case 17 is provided at the left end of the pipe case 16. The transmission case 17 is configured to rotationally drive the tillage shaft portion 18 by transmitting the rotational driving force transmitted by the gear unit 13.

The tilling shaft portion 18 is provided so as to extend over the entire length in the lateral width direction of the tilling work machine 10, and a plurality of tilling claw portions 14 are provided at intervals with respect to the tilling shaft portion 18. As a result, the tilling shaft portion 18 is rotationally driven, so that the plurality of tilling claw portions 14 are rotationally driven. Incidentally, the tilling claw portion 14 is configured to perform down-cut tilling that is rotationally driven counterclockwise in FIG.

As shown in FIGS. 2 to 4, the cover 15 is an upper cover that covers the upper side of the tilling claw portion 14 in a state where a gap portion 25 is formed between the cover 15 and the rotation locus R (see FIG. 4) of the tilling claw portion 14. A rear cover 152 that covers the rear side of the tillage claw portion 14 in a state where a gap portion 26 is formed between the 151 and the rotation locus R of the tillage claw portion 14 is provided.

The upper cover 151 is formed in an arc shape from the front end portion to the rear end portion, and the rear cover 152 is also formed in an arc shape from the front end portion to the rear end portion. Then, the front end portion of the rear cover 152 is rotatably connected to the rear end portion of the upper cover 151 around the axis G1 (see FIG. 4) along the lateral width direction of the tilling work machine 10, and the rear cover 152 is connected to the upper cover 151. It is supported so that it can swing up and down. The rear end side portion of the rear cover 152 is arranged so as to be in contact with the field, and the rear end side portion of the rear cover 152 is configured as a ground leveling plate 154 for leveling the field.

As shown in FIGS. 2 and 3, the tilling work machine 10 is provided with a side cover 153 that covers the side portion of the tilling claw portion 14 in addition to the upper cover 151 and the rear cover 152. The side cover 153 is formed in a plate shape extending in the vertical direction and the front-rear direction, and is arranged at both ends in the lateral width direction of the tilling work machine 10.

The tilling work machine 10 is provided with a pair of left and right hanger lock mechanisms 24 that can hold the rear cover 152 in a state of being rotated upward. The hanger lock mechanism 24 is provided with a hanger rod 241 extending in the vertical direction and a lock support portion 242 capable of holding an upper end side portion of the hanger rod 241 in a state of blocking the movement of the hanger rod 241. The lower end of the hanger rod 241 is rotatably connected to the rear end side portion of the rear cover 152 around the axis along the lateral width direction of the tilling work machine 10. The lock support portion 242 movably supports the hanger rod 241 in a state where the hanger rod 241 is inserted, and by engaging a pin or the like with the hanger rod 241, the hanger rod 241 is prevented from moving. It is configured to hold. Then, the hanger rod 241 can be moved with respect to the lock support portion 242 by disengaging the pin or the like with the hanger rod 241. As a result, the hanger lock mechanism 24 moves the hanger rod 241 with respect to the lock support portion 242 as the rear cover 152 is rotated upward, and engages the pin or the like with the hanger rod 241 to engage the rear cover portion 241. The cover 152 is configured to be held in a state of being rotated upward.

As described above, the tilling work machine 10 is provided with a pipe case 16 extending over the entire length in the width direction of the tilling work machine 10, and on the rear side of the pipe case 16 in the width direction of the tilling work machine 10. A frame pipe 19 extending over the entire length is provided. In this way, by providing the pipe case 16 and the frame pipe 19, the rigidity of the tilling work machine 10 is improved.

Further, the tilling work machine 10 is provided with a tail wheel support frame 20 for additionally providing a tail wheel. The front end of the tail wheel support frame 20 is rotatably connected to the rear end of the lower connecting portion 11 around the axis along the lateral width direction of the tilling work machine 10.

Hereinafter, the intervals between the gaps 25 and 26 between the rotation locus R of the tillage claw portion 14 (the outer peripheral portion of the rotation locus R of the tillage claw portion 14) and the cover 15 will be described with reference to FIG.
As described above, the gap portion 25 is formed between the rotation locus R of the tillage claw portion 14 and the upper cover 151, and the gap portion 26 is formed between the rotation locus R of the tillage claw portion 14 and the rear cover 152. Has been done. Then, in the gaps 25 and 26, in the rotation region from the rear side to the upper side of the tillage claw portion 14, the distance between the rotation locus R of the tillage claw portion 14 and the rear cover 152 is the rotation of the tillage claw portion 14. An interval changing portion 27 that gradually decreases in the direction A is provided.

The interval changing portion 27 is formed from a portion corresponding to an entrance portion where the soil scooped up by the tilling claw portion 14 enters the gap portion 26 between the rotation locus R of the tilling claw portion 14 and the rear cover 152. It is provided toward the upward rotation region of the portion 14. That is, the interval changing portion 27 is arranged so that the soil scraped up by the tilling claw portion 14 enters the entrance portion of the interval changing portion 27. For example, the interval changing portion 27 is the uppermost portion of the upper cover 151 (for example, in FIG. 4, from the position indicated by K4 in FIG. 4) by a set amount above the rear side of the tillage claw portion 14. It is provided in the rotation region of the tilling claw portion 14 up to the position indicated by K2).

The distance between the rotation locus R of the tilling claw portion 14 and the rear cover 152 in the interval changing portion 27 can be configured to be smaller toward the downstream side of the rotation direction A of the tilling claw portion 14, for example. Further, in the rotation direction A of the cultivated claw portion 14, the rotation locus R of the cultivated claw portion 14 has a portion in which the distance between the rotation locus R of the cultivated claw portion 14 and the rear cover 152 is the same or substantially the same. It can also be configured to gradually reduce the distance between the rear cover 152 and the rear cover 152. As described above, in the interval changing portion 27, the distance between the rotation locus R of the tilling claw portion 14 and the rear cover 152 does not change abruptly in the rotation direction A of the tilling claw portion 14, but gradually decreases. It suffices as long as it becomes.

Then, in the middle of the interval changing portion 27, a protruding portion 211 projecting from the cover 15 side to the rotation locus R side of the tilling claw portion 14 is provided in a state where the interval is separated from the rotation locus R of the tilling claw portion 14. Has been done. The protruding portion 211 is arranged downstream of the axial center G1 which is the rotation fulcrum of the rear cover 152 with respect to the upper cover 151 in the rotation direction A of the tilling claw portion 14. The protruding portion 211 is arranged, for example, in the rotation region of the tilling claw portion 14 on the upper side of the intermediate portion between the rear portion and the upper portion of the tilling claw portion 14.

The distance between the rotation locus R of the tillage claw portion 14 and the cover 15 in the gap portions 25 and 26 is configured to satisfy the following [relationship formula 1] and [relationship formula 2]. Here, the distance between the rotation locus R of the tilling claw portion 14 at the front end portion of the upper cover 151 and the upper cover 151 is K1, and the rotation locus R of the tilling claw portion 14 and the upper cover 151 at the uppermost portion of the upper cover 151. Let K2 be the interval between and. Further, the distance between the rotation locus R of the tilling claw portion 14 and the protruding portion 211 (the tip portion of the protruding portion 211) is set to K3, and the rotation locus R and the rear portion of the tilling claw portion 14 at the rear end portion of the interval changing portion 27. The distance between the cover 152 and the cover 152 is K4.

[Relational formula 1]
K4> K1 ≒ K2> K3

[Relational expression 2]
K2>K3> K2 / 2

Further, regarding the distance between the rotation locus R of the cultivated claw portion 14 and the cover 15 in the gap portions 25 and 26, the rotation locus of the cultivated claw portion 14 at the axis G1 which is the swing fulcrum of the rear cover 152 with respect to the upper cover 151. Assuming that the distance between R and the cover 15 is K5, it can be configured to satisfy the following [relational expression 3] and [relational expression 4].

[Relational formula 3]
K4 = K5, K4 ≒ K5, or K4> K5

[Relational formula 4]
K5> K3

As described above, by providing the interval changing portion 27, when the soil scraped up by the tilling claw portion 14 is supplied to the front side thereof, the soil can be supplied to the front side through the interval changing portion 27. can. Then, in the interval changing portion 27, the distance between the rotation locus R of the tilling claw portion 14 and the cover 15 gradually decreases in the rotation direction A of the tilling claw portion 14, so that the soil that has entered the gap changing portion 27 is moved forward. You can guide smoothly to the side. Moreover, the interval changing portion 27 has a larger K4, which is the interval between the rotation locus R of the tillage claw portion 14 and the cover 15 at the rear end portion of the interval changing portion 27 corresponding to the inlet portion side of the interval changing portion 27. By doing so, the soil scraped up by the tillage claw portion 14 can be positively supplied to the inlet side of the interval changing portion 27, and a sufficient amount of soil is supplied to the front side through the interval changing portion 27. be able to.

In this way, the soil scraped up by the tilling claw portion 14 can be positively supplied to the scraped position and the front side of the tilling claw portion 14, so that the soil is cultivated again. As a result, the soil crushing performance can be improved. Therefore, when the cultivated soil is pressed by the ground preparation plate 154, which is the lower portion of the rear cover 152, the sufficiently cultivated soil can be pressed, so that the surface of the field can be made a clean flat surface. ..

As for the distance between the rotation locus R of the cultivated claw portion 14 and the cover 15, K3, which is the distance between the rotation locus R of the cultivated claw portion 14 and the projecting portion 211, is set at the front end portion of the upper cover 151. K1 which is the distance between the rotation locus R of the tilling claw portion 14 and the upper cover 151, and K2 which is the distance between the rotation locus R of the tilling claw portion 14 and the upper cover 151 at the uppermost portion of the upper cover 151. By making it smaller than the above, it is possible to appropriately prevent foreign matter such as stones from entering the front end portion of the upper cover 151 and the uppermost portion of the upper cover 151. Therefore, at the front end portion of the upper cover 151 and the uppermost portion of the upper cover 151, foreign matter such as stones is appropriately prevented from being caught between the upper cover 151 and the tilling claw portion 14, and the upper cover 151 is damaged. It can be prevented appropriately.

Moreover, regarding K3, which is the distance between the rotation locus R of the cultivated claw portion 14 and the protruding portion 211, the distance between the rotation locus R of the cultivated claw portion 14 and the upper cover 151 at the uppermost portion of the upper cover 151. Since it is possible to secure a larger interval than K2 / 2 while making it smaller than a certain K2, it is possible to supply soil to the downstream side of the cultivating claw portion 14 in the rotation direction A from the protruding portion 211, and cultivating. The soil scraped up by the claw portion 14 can be positively supplied to the front side of the cultivated claw portion 14.

As shown in FIGS. 4 and 5, the seat body 22 is provided inside the cover 15 in a posture along the inner surface portion of the cover 15. Here, FIG. 5 shows a perspective view of the tilling work machine 10 when viewed from diagonally below, omitting the tilling shaft portion 18, the tilling claw portion 14, and the like. As the seat body 22, a front side seat body 221 arranged on the front side of the cover 15 and a rear side seat body 222 arranged on the rear side of the cover 15 are provided, and the front side seat body 221 and the rear side seat body 222 are provided. And are provided in a state of being continuous in the front-back direction. The front side sheet body 221 is made of, for example, a resin sheet body, and the rear side sheet body 222 is made of, for example, a sheet body having an elastic force such as rubber.

A support 21 for fixing the front seat body 221 and the rear seat body 222 to the cover 15 is provided, and a protruding portion 211 is provided on the support 21. Then, as shown in FIG. 5, the support 21 is provided over the entire length of the cover 15 in the lateral width direction, and the protruding portion 211 is also provided over the entire length of the cover 15 in the lateral width direction. As shown in FIG. 4, the support 21 is arranged so as to extend forward from a position adjacent to the axial center G1 which is the swing fulcrum of the rear cover 152 with respect to the upper cover 151. As shown in FIGS. 4 and 6, the support 21 is formed into an integral plate-like body provided in the order of the fastening portion 212, the inclined portion 213, and the sandwiching portion 214 from the upstream side in the rotation direction A of the tilling claw portion 14. It is composed of.

As shown in FIG. 6, the fastening portion 212 is formed in a plate shape along the inner surface portion of the upper cover 151. The fastening portion 212 is configured to be fastened together with the rear side seat body 222 by a fastening member 23 such as a bolt and a nut to fix the rear side seat body 222 to the rear end side portion of the upper cover 151. There is.

The inclined portion 213 is formed so as to be closer to the rotation locus R side of the tilling claw portion 14 toward the downstream side in the rotation direction A of the tilling claw portion 14. The inclined portion 213 is provided on the support 21 as a protruding portion 211.

The sandwiching portion 214 is configured to fix the front side seat body 221 to the upper cover 151 by sandwiching the front side seat body 221 with the upper cover 151. The sandwiching portion 214 is extended in the support 21 in a state of being folded back from the end of the inclined portion 213 (protruding portion 211) on the side approaching the rotation locus R of the tillage claw portion 14 to the side approaching the upper cover 151. Has been done. As a result, the support 21 is formed in a V shape in a side view by the inclined portion 213 and the sandwiching portion 214. Incidentally, in addition to being sandwiched by the sandwiching portion 214, the front end portion of the front side seat body 221 is fastened to the front end portion of the upper cover 151 by a fastening member 23 (see FIGS. 4 and 5) such as bolts and nuts. Therefore, it is fixed to the upper cover 151.

[Another Embodiment]
(1) In the above embodiment, an example in which the projecting portion 211 is provided on the support 21 is shown. However, for example, the projecting portion 211 can be provided separately from the support 21, and how the projecting portion 211 is provided. Can be changed as appropriate.

(2) In the above embodiment, the distance between the rotation locus R of the tillage claw portion 14 and the cover 15 in the gap portions 25 and 26 is configured to satisfy the above [relationship formula 1]. Regarding the relationship between K1 and K2, K1 <K2 or K2 <K1 can also be set.

(3) In the above embodiment, the distance between the rotation locus R of the tillage claw portion 14 and the cover 15 in the gap portions 25 and 26 is configured to satisfy the above [relationship formula 2]. Regarding the relationship with K3, it can be configured so that only K2> K3 is satisfied. That is, it is possible to appropriately change how much distance is secured as the distance K3 between the rotation locus R of the tillage claw portion 14 and the protrusion 211 (the tip of the protrusion 211).

For example, when it is desired to secure a large amount of soil to be supplied to the front side of the cultivated claw portion 14, the rotation locus R of the cultivated claw portion 14 and the protruding portion 211 (the tip portion of the protruding portion 211) ), It is desirable that the distance K3 is larger. Further, in a mountainous area or the like, since many stones are present in the field, the distance K3 between the rotation locus R of the tilling claw portion 14 and the protrusion 211 (the tip of the protrusion 211) is set to a smaller distance. By doing so, it is possible to appropriately prevent damage to the cover 15 due to the biting of foreign matter such as stones.

For example, a plurality of types of projecting portions 211 having different intervals K3 between the rotation locus R of the tilling claw portion 14 and the projecting portion 211 (tip portion of the projecting portion 211) are prepared in advance, and depending on the field conditions and the like. , Which protrusion 211 to use can also be selected.

(4) In the above embodiment, the support 21 is formed in a V shape in a side view by extending from the protruding portion 211 and providing the sandwiching portion 214. What kind of shape is the support 21? It can be changed as appropriate whether it is formed in.

(5) In the above embodiment, an example in which the projecting portion 211 is provided with the inclined portion 213 is shown. For example, a plate-like body extending linearly from the cover 15 side to the rotation locus R side of the tilling claw portion 14 is projected. The portion 211 can also be configured, and the shape of the protruding portion 211 can be appropriately changed.

(6) In the above embodiment, the interval changing portion 27 is moved from the upper side (for example, the position indicated by K4 in FIG. 4) by a set amount above the rear side of the tilling claw portion 14 to the uppermost portion of the upper cover 151 (for example, the position indicated by K4 in FIG. 4). For example, the rotating region of the tilling claw portion 14 up to (the position indicated by K2 in FIG. 4) is provided, but the spacing changing portion 27 is provided in the rotating region from the rear side to the upper side of the tilling claw portion. It is sufficient, and it is possible to appropriately change which portion of the rotation region from the rear side to the upper side of the tillage claw portion is provided with the interval changing portion 27.

For example, from the position corresponding to the axial center G1 which is the swing fulcrum of the rear cover 152 with respect to the upper cover 151 (for example, the position indicated by K5 in FIG. 4), the uppermost portion of the upper cover 151 (for example, in FIG. 4). The interval changing portion 27 can be provided in the rotation region of the tilling claw portion 14 up to the position indicated by K2).

Further, in the above embodiment, the interval changing portion 27 is arranged so that the soil scraped up by the tilling claw portion 14 enters the entrance portion of the interval changing portion 27. For example, the tilling claw portion 14 is provided. The soil that has been scraped up enters the gap 26 between the rotation locus R of the tillage claw portion 14 and the rear cover 152, and is located downstream of the portion corresponding to the entrance portion in the rotation direction A of the tillage claw portion 14. The interval changing portion 27 may be arranged so that the entrance portion of the interval changing portion 27 is located.

In this way, the position of the inlet portion of the interval changing portion 27 can be appropriately changed, and the position of the terminal portion of the interval changing portion 27 can also be appropriately changed.

10 Tilling work machine 14 Tilling claw part 151 Top cover 152 Rear cover 211 Protruding part 212 Fastening part (support part)
213 Inclined part G1 Axial center R Rotational locus of tillage claw part

Claims (5)

Rotationally driveable tillage claws and
An upper cover that covers the upper side of the tillage claw portion and
A rear cover that covers the rear side of the tillage claw portion is provided.
The upper cover is provided with a protruding portion that protrudes from the upper cover side to the rotation locus side of the tilling claw portion .
A seat body can be fixed to the inside of the upper cover by a support, and the protrusion is provided on the support.
The support has a sandwiching portion for fixing the sheet body to the upper cover by sandwiching the sheet body with the upper cover.
The sandwiching portion is characterized in that the support is extended in a state of being folded back from an end portion of the protruding portion on the side approaching the rotation locus of the tilling claw portion to a side approaching the upper cover. Tilling work machine to do. The tilling work machine according to claim 1, wherein the protruding portion is provided with an inclined portion that approaches the rotation locus side of the tilling claw portion toward the downstream side in the rotation direction of the tilling claw portion. The tilling work machine according to claim 2, wherein the inclined portion is provided over the entire length in the lateral width direction of the upper cover. The rear cover is configured to be rotatable around an axial center serving as a rotation fulcrum provided in the front portion of the rear cover.
The tilling work machine according to claim 2 or 3, wherein the inclined portion is provided on the downstream side in the rotation direction of the tilling claw portion with respect to the axial center serving as a rotation fulcrum. The tilling work machine according to any one of claims 2 to 4, wherein the supporting portion of the inclined portion is provided on the upstream side in the rotation direction of the tilling claw portion with respect to the inclined portion.

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