JP6925022B2 - Work machine - Google Patents

Description

The present invention relates to a working machine. In particular, the present invention relates to a work machine capable of switching a part of the work machine between a work state and a stored state.

Currently, in order to reduce the working hours of agricultural work, automatic work machines are being promoted, and various work machines are being developed. In particular, a work machine (cultivator or puddling machine) that is attached to the rear of a tractor or other traveling machine and can be replaced according to the type of work, such as tilling or puddling, is like an attachment to a tractor or other running machine. It is possible to handle various farm work just by exchanging it, which greatly contributes to the cost reduction of farm work.

Working machines such as cultivators and puddling machines have working rotors that cultivate or agitate the soil by rotating the working claws. A work machine having a work rotor has a ground leveling mechanism behind the work rotor in order to level the soil roughened by the work claws. In these working machines, in order to efficiently work on the soil, it is preferable that the width in the direction orthogonal to the traveling direction of the traveling machine is large. However, the above-mentioned work machine needs to travel on a farm road or a general road when moving from a storage place for storing the work machine to a place for work (for example, a field). Therefore, the width of the working machine is limited.

Therefore, as in Patent Documents 1 and 2, for example, by rotating (rotating) a part of the working portion provided in the working machine, the extended working portion is folded and the stored state and the extended working portion are developed. A work machine that can switch between the work state and the work state has been developed. As shown in Patent Documents 1 and 2, in the case of a work machine that switches from a stored state to a work state by expanding the extension work part, in order to work uniformly on the soil, the work part and the extension work part are separated. It needs to be linked. In Patent Documents 1 and 2, in order to link the working portion and the extension working portion, a connecting member for connecting them is provided.

Japanese Unexamined Patent Publication No. 2012-08595 Japanese Unexamined Patent Publication No. 2006-034225

However, when the extension work part is deployed in a state where the work part provided with the connecting member and the extension work part are deviated from each other from the proper state, the work part and the extension work part are in a state where the connecting member is deviated from the proper position. There was a problem that it was not possible to work uniformly on the soil because it was connected by.

The present invention has been made in view of such a problem, and provides a work machine capable of switching between a stored state and a work state, which can reduce the work load on the user. The purpose.

The work machine (work machine 10) according to the embodiment of the present invention can be rotated to a first cover member (apron 120) provided behind the first work rotor for rotating the work claw, and the first cover member. The first working part (working part 100) having the first leveling member (leveler 130) connected to the first working part is connected to the first working part so as to be able to switch between the stored state and the working state, and the working claw in the working state. A second having a second cover member (extension apron 220) provided behind the second work rotor and a second leveling member (extension leveler 230) rotatably connected to the second cover member. A working unit (extension work unit 200), a first receiving member (first receiving member 420) attached to the first leveling member, and a first locking member (first engaging member) attached to the second leveling member. Stop member 410), a second receiving member (second receiving member 440) attached to the second cover member, and a second locking member (second locking member 430) attached to the second leveling member. In the working state, the first locking member locks the first receiving member to restrict the rotation of the second leveling member with respect to the first leveling member, and the stored state. In the above, when the second locking member is locked to the second receiving member, the rotation of the second leveling member with respect to the second cover member is restricted, and the first locking member and the second locking member are locked. The members are interlocked and movable with respect to the second leveling member.

Even if the second locking member is disengaged from the second receiving member and the second leveling member becomes rotatable with respect to the second cover member when the second working portion is in the working state. good.

In a state where the first locking member is disengaged from the first receiving member, the second locking member slides with a part of the second receiving member, so that the second covering member has the second cover member. 2 The ground leveling member may be rotatable.

In a state where the first locking member is detached from the first receiving member, the second locking member is the second in a state where the angles of the second leveling member with respect to the second cover member are different from each other. It may be locked to the receiving member.

The first receiving member has a first stopper (stopper 428), and in the working state, the first locking member comes into contact with the first stopper, so that the second locking member receives the second receiving member. It may come off from the member.

It further has an elastic member (elastic member 470) that acts on the second ground leveling member and the first locking member, and in the working state, the first locking member is directed toward the first receiving member by the elastic member. It may be pressed.

The first stopper has an inclined surface that is inclined with respect to a surface orthogonal to the direction in which the first locking member is pressed in the working state, and the first locking member pressed by the elastic member is It may be pressed against the inclined surface.

The first locking member includes a first columnar portion (first columnar portion 412) and a second columnar portion (second columnar portion 414) having a length in the first direction, and the first columnar portion and the second columnar portion. Even if it has a connecting portion (connecting portion 416) that connects the portions, and the connecting portion is locked to the first receiving member, the rotation of the second leveling member with respect to the first leveling member is restricted. good.

The second locking member has a longitudinal length in the first direction, and the first columnar portion and the second locking member may be fixed by a fixing portion (fixing portion 432).

The first leveling member has a second stopper (stopper 460), and when the first locking member is locked to the second stopper, the rotation of the second leveling member with respect to the first leveling member is caused. It may be regulated.

By locking the connecting portion to the second stopper, the rotation of the second leveling member with respect to the first leveling member may be restricted.

The first receiving member may be detachable from the first leveling member, and the first locking member and the second locking member may be detachable from the second leveling member.

The second receiving member may be detachable from the second cover member.

According to the work machine according to the present invention, it is possible to provide a work machine capable of switching between a stored state and a work state, which can reduce the work load on the user.

It is a top view which shows the whole structure of the working machine in the working state which concerns on one Embodiment of this invention. It is a side view which shows the whole structure of the working machine in the working state which concerns on one Embodiment of this invention. It is a top view which shows the connection structure of the work part and the extension work part of the work machine before the work state which concerns on one Embodiment of this invention. It is a rear view which shows the connection structure of the work part and the extension work part of the work machine before the work state which concerns on one Embodiment of this invention. It is a side view which looked at the extension work part of the work machine before the work state which concerns on one Embodiment of this invention from the work part side. It is a figure which shows the relationship between the 2nd locking member and the 2nd receiving member in the state of FIG. 5A. FIG. 5B is a cross-sectional view taken along the line AA'of FIG. 5B. It is a side view which looked at the extension work part of the work machine from the work part side when a strong load was applied to the extension work part in the state before the work state which concerns on one Embodiment of this invention. It is a side view which looked at the work part of the work machine which concerns on one Embodiment of this invention from the extension work part side. It is a top view which shows the connection structure of the work part and the extension work part of the work machine in the work state which concerns on one Embodiment of this invention. It is a rear view which shows the connection structure of the work part and the extension work part of the work machine in the work state which concerns on one Embodiment of this invention. It is a side view which looked at the extension work part of the work machine in the work state which concerns on one Embodiment of this invention from the work part side. It is a figure which shows the relationship between the 2nd locking member and the 2nd receiving member in the state of FIG. 9A. 9B is a cross-sectional view taken along the line AA'in FIG. 9B. It is a top view which shows the connection structure of the work part and the extension work part of the work machine before the work state which concerns on one Embodiment of this invention. It is a side view which looked at the extension work part of the work machine before the work state which concerns on one Embodiment of this invention from the work part side. It is a figure which shows the relationship between the 2nd locking member and the 2nd receiving member in the state of FIG. 11A. 11B is a cross-sectional view taken along the line AA'of FIG. 11B. It is a side view which looked at the extension work part of the work machine before the work state which concerns on one Embodiment of this invention in the direction of a work part. It is a figure which shows the relationship between the 2nd locking member and the 2nd receiving member in the state of FIG. 12A. It is sectional drawing of the line AA'of FIG. 12B. It is a rear view which shows the connection structure of the work part and the extension work part of the work machine before the work state which concerns on one Embodiment of this invention. It is a rear view which shows the connection structure of the work part and the extension work part of the work machine before the work state which concerns on one Embodiment of this invention. It is an enlarged rear view which shows the connection structure of the work part and the extension work part of the work machine just before the work state which concerns on one Embodiment of this invention. It is an enlarged rear view which shows the connection structure of the work part and the extension work part of the work machine just before the work state which concerns on one Embodiment of this invention.

Hereinafter, the working machine according to the present invention will be described with reference to the drawings. However, the working machine of the present invention can be implemented in many different modes, and is not construed as being limited to the description of the embodiments shown below. In the drawings referred to in the present embodiment, the same parts or parts having the same functions are designated by the same reference numerals, and the repeated description thereof will be omitted. Further, for convenience of explanation, the terms "upper" and "lower" will be used, but the upper and lower directions indicate the directions of the working machine in the working state, respectively. Similarly, although the description will be made using the terms front and rear, the front indicates the direction of the traveling machine that pulls the working machine with respect to the working machine, and the rear indicates the direction of the working machine with respect to the traveling machine.

<Embodiment 1>
The overall configuration of the working machine and each functional part of the working machine according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 13. The working machine according to the first embodiment of the present invention is used as a working machine such as a cultivator or a puddling machine, which is connected to the rear part of a traveling machine such as a tractor and cultivates or stirs soil by rotating a working claw. be able to. The work machine according to the first embodiment has a stored state in which the width of the work machine is narrowed by folding or detaching a part of the work machine, and the width of the work machine by expanding or mounting a part of the work machine. It can be used for a work machine that can switch between the expanded work state and the work state. In the first embodiment, the features of the present invention will be described using a puddling machine as an example of the working machine, but the working machine according to the present invention may be a cultivator, and may be a cultivator and a working machine other than the puddling machine. It can also be applied.

[Structure of working machine 10]
FIG. 1 is a top view showing the overall configuration of a working machine in a working state according to an embodiment of the present invention. FIG. 2 is a side view showing the overall configuration of the working machine in the working state according to the embodiment of the present invention. As shown in FIGS. 1 and 2, the working machine 10 according to the first embodiment includes a working unit 100, an extension working unit 200, a switching unit 300, a connecting unit 400, a leveler control unit 500, and a rotor unit 600 (see FIG. 2). Have.

The working unit 100 (first working unit) has a shield cover 110, an apron 120 (first cover member), and a leveler 130 (first leveling member).

The shield cover 110 and the apron 120 are connected with the connecting portion 122 as a rotation movement shaft (rotation shaft). The apron 120 and the leveler 130 are connected with the connecting portion 132 as a rotation axis. The connecting portion 122 and the connecting portion 132 have a hinge-shaped hinge. That is, the connecting portion 122 and the connecting portion 132 have a cylindrical portion fixed to one member and a columnar portion penetrating the cylindrical portion and fixed to the other member. The apron 120 is provided behind the rotor portion 600 (first working rotor) that rotates the working claw 610 (see FIG. 2). The apron 120 suppresses the scattered matter scattered by the work of the rotor unit 600 from being released to the outside. The leveler 130 prepares the rough soil by the work of the rotor portion 600.

The extension work unit 200 (second work unit) is connected to the work unit 100 so that the work machine 10 can switch between the stored state and the work state. Here, the stored state is a state in which the width of the working machine 10 is reduced in a direction orthogonal to the traveling direction of the traveling machine body. Specifically, the folded state in which the extension work unit 200 rotates with respect to the work unit 100 is referred to as a stored state. The working state is a state in which the width of the working machine 10 is extended in a direction orthogonal to the traveling direction of the traveling machine body. Specifically, the state in which the extension work unit 200 rotates with respect to the work unit 100 from the stored state and is expanded is referred to as a work state.

The extension work unit 200 has an extension shield cover 210, an extension apron 220 (second cover member), and an extension leveler 230 (second leveling member) like the work unit 100. The extension shield cover 210 is provided above the work rotor (second work rotor) provided corresponding to the extension work portion 200 in the rotor portion 600. The extension apron 220 is provided behind the work rotor of the extension work portion 200, and is rotatably connected to the extension shield cover 210 about the connection portion 222. The extension leveler 230 is provided behind the work rotor of the extension work section 200, and is rotatably connected to the extension apron 220 about the connection section 232. The extension apron 220 works in conjunction with the apron 120 to prevent the scattered material scattered by the work of the rotor unit 600 from being released to the outside. The extension leveler 230 works in conjunction with the leveler 130 to level the rough soil by the work of the rotor portion 600. Although the details will be described later, the leveler 130 and the extension leveler 230 are connected by the connecting portion 400.

The switching unit 300 has a control cylinder 310 and a connecting unit 320, and switches between a stored state and a working state by rotating the extension working unit 200 with respect to the working unit 100. One end of the control cylinder 310 is rotatably connected to a connecting portion 311 fixed to the working portion 100, and the other end is rotatably connected to a connecting portion 312 fixed to the extension working portion 200. The extension work unit 200 is folded when the control cylinder 310 contracts and switched to the stored state, and is expanded and switched to the working state when the control cylinder 310 expands.

The connecting portion 400 is attached to the leveler 130 of the working portion 100 and the extension leveler 230 of the extension working portion 200. In the working state shown in FIG. 1, the connecting portion 400 connects the leveler 130 and the extended leveler 230. The connecting portion 400 has a first locking member 410 and a first receiving member 420, and when the first locking member 410 enters the first receiving member 420, the leveler 130 and the extension leveler 230 are connected. The connecting portion 400 regulates the relative operating range of the leveler 130 and the extended leveler 230 in the working state. Although the details will be described later, the connecting portion 400 restricts the rotation of the extension leveler 230 with respect to the extension apron 220 in a state where the first locking member 410 is detached from the first receiving member 420. That is, the rotation of the extension leveler 230 with respect to the extension apron 220 is restricted by the connecting portion 400 in a state other than the working state.

The leveler control unit 500 is connected to the shield cover 110 and the leveler 130, and adjusts the position and angle of the leveler 130 with respect to the shield cover 110. The leveler control unit 500 controls the height and angle of the leveler 130 with respect to the ground.

A leveler extension 510 is provided at the outer end of the extension leveler 230. The leveler extension 510 further expands the width that can be leveled. The leveler extension 510 is rotatably connected to the extension level 230. The extension direction (longitudinal direction) of the leveler extension portion 510 is inclined toward the traveling machine body with respect to the extension direction of the leveler 130 and the extension leveler 230.

A soil gathering plate 520 is provided on the traveling machine side of the shield cover 110. The earth gathering plate 520 is attached so as to be slidable in a direction orthogonal to the traveling direction of the traveling machine body. When the work machine 10 is used, the earth gathering plate 520 is installed in accordance with the position of the wheels and the like of the traveling machine body to alleviate the step caused by the rut.

As shown in FIG. 2, the rotor unit 600 has a work claw 610 and a power unit 620. The work claw 610 is rotated by the power unit 620 and acts on the soil to plow or agitate the soil. In FIG. 2, the range in which the work claw 610 rotates is shown as the rotation range 612.

[Explanation of the connecting portion 400 in the state before the working state]
The configuration of the connecting portion 400 that connects the leveler 130 and the extended leveler 230 will be described in detail with reference to FIGS. 3 to 11.

FIG. 3 is a top view showing a connecting structure of a working portion and an extension working portion of a working machine before a working state according to an embodiment of the present invention. FIG. 4 is a rear view showing a connecting structure of a working portion and an extension working portion of a working machine before a working state according to an embodiment of the present invention. As shown in FIGS. 3 and 4, the connecting portion 400 has a first locking member 410, a first receiving member 420, a second locking member 430, a second receiving member 440, a stopper 460, and an elastic member 470. The first receiving member 420 is attached to the leveler 130. The first locking member 410 and the second locking member 430 are attached to the extension leveler 230. The second receiving member 440 is attached to the extension apron 220.

The first locking member 410 has a first columnar portion 412, a second columnar portion 414, a connecting portion 416, and a stopper 418. The first columnar portion 412 and the second columnar portion 414 extend in the D1 direction. The D1 direction is the direction from the extension leveler 230 to the leveler 130 in the working state. That is, the first columnar portion 412 and the second columnar portion 414 have a longitudinal length in the D1 direction. The connecting portion 416 extends in a direction intersecting the D1 direction, and connects the first columnar portion 412 and the second columnar portion 414. Since the connecting portion 416 is connected to each end of the first columnar portion 412 and the second columnar portion 414, the first locking member 410 has a U-shape. The stopper 418 is provided on each of the first columnar portion 412 and the second columnar portion 414. The stopper 418 is provided around each of the first columnar portion 412 and the second columnar portion 414, and is fixed to each of the first columnar portion 412 and the second columnar portion 414 by a method such as welding. The stopper 418 regulates the movement of the first locking member 410 in the D1 direction.

The first locking member 410 is detachably attached to the extension leveler 230 by a screw or a fixture such as a bolt and a nut. The elastic member 470 is attached around each of the first columnar portion 412 and the second columnar portion 414, and presses the first locking member 410 in the D1 direction. That is, the elastic member 470 acts on each of the extension leveler 230 and the first locking member 410. The first locking member 410 is pressed in the D1 direction by the elastic member 470.

The first receiving member 420 has a storage portion 422, an upper guide portion 424, a lower guide portion 426, and a stopper 428. The storage portion 422 has a space into which the first locking member 410 can be inserted. Specifically, the storage portion 422 has an upper member 4220 and a lower member 4222, and a space into which the first locking member 410 can be inserted is provided between the upper member 4220 and the lower member 4222. In other words, the distance between the upper member 4220 and the lower member 4222 in the D3 direction is larger than the thickness of the first locking member 410 in the D3 direction.

The upper guide portion 424 extends from the upper member 4220 in the D3 direction. The upper guide portion 424 is continuous with the upper member 4220. In the example of FIG. 4, the upper guide portion 424 and the upper member 4220 are integrally formed. The upper guide portion 424 extends in a direction orthogonal to the direction in which the first locking member 410 is inserted into the first receiving member 420. The lower guide portion 426 extends from the lower member 4222 in the opposite direction in the D3 direction. The lower guide portion 426 has an inclination with respect to the direction in which the first locking member 410 is inserted into the first receiving member 420. The inclined surface faces the first locking member 410 side. In the example of FIG. 4, the lower guide portion 426 and the lower member 4222 are integrally formed.

The first receiving member 420 is not limited to the structures shown in FIGS. 3 and 4. The upper guide portion 424 may be formed separately from the upper member 4220, and both may be fixed by adhesion or welding. The lower guide portion 426 may be formed separately from the lower member 4222, and both may be fixed by adhesion or welding. The upper guide portion 424 may have an inclination with respect to a direction orthogonal to the D1 direction. The lower guide portion 426 may extend in a direction orthogonal to the D1 direction.

Although the details will be described later, the upper guide portion 424 is the D1 of the first locking member 410 when the extension work portion 200 is deployed in the working state with the extension leveler 230 rotated upward with respect to the leveler 130. Regulate directional movement. This prevents the first locking member 410 from riding on the first receiving member 420 or the leveler 130. Further, in a state where the first locking member 410 is in contact with the upper guide portion 424 (a state in which the first locking member 410 is pressed against the upper guide portion 424), the first locking member 410 is D1 by the elastic member 470. Pushed in the direction. That is, when the extension leveler 230 rotates with respect to the leveler 130 in this state, both slide in a state where the first locking member 410 is pressed against the upper guide portion 424. The lower guide portion 426 is a first locking member when the extension working portion 200 is deployed in the working state in a state where the extension leveler 230 is rotated downward with respect to the leveler 130 (second locking state described later). The 410 is guided to the storage unit 422.

As described above, since the first receiving member 420 is provided with the upper guide portion 424 and the lower guide portion 426, the extension work portion 200 is deployed in the working state with the leveler 130 and the extension leveler 230 in inappropriate positions. Even if it is done, it is possible to prevent the two from being connected in an inappropriate position. Further, in such a state, since the first locking member 410 slides in a state of being pressed against the upper guide portion 424, the first locking member 130 and the extension leveler 230 are in an appropriate positional relationship. The locking member 410 is inserted into the first receiving member 420, and the angle of the extension leveler 230 with respect to the leveler 130 is fixed.

The stopper 428 is provided in the storage portion 422. The stopper 428 is continuous with the lower guide portion 426. In the example of FIG. 4, the stopper 428 and the lower guide portion 426 are integrally formed, but the stopper 428 may be formed separately from the lower guide portion 426. The stopper 428 regulates the operation of the first locking member 410 in the D1 direction when the extension work portion 200 is deployed in the working state. In other words, when the extension work unit 200 is deployed in the working state, the first locking member 410 comes into contact with the stopper 428 and moves relatively in the opposite direction to the extension leveler 230 in the D1 direction.

The first receiving member 420 is detachably attached to the leveler 130 by a screw or a fixture such as a bolt and a nut. Since the first receiving member 420 is detachably attached to the leveler 130, when the first receiving member 420 is worn or damaged, it is easy to repair or replace only the first receiving member 420. Can complete the repair.

The second locking member 430 is provided at a position adjacent to the first locking member 410. The second locking member 430 is fixed to the first locking member 410 by the fixing portion 432. That is, the first locking member 410 and the second locking member 430 are interlocked and movable with respect to the extension leveler 230. The second locking member 430 extends in the D1 direction in the same manner as the first columnar portion 412 and the second columnar portion 414 of the first locking member 410. That is, the second locking member 430 has a length in the D1 direction. The second locking member 430, together with the first locking member 410, is detachably attached to the extension leveler 230 by a fixing tool such as a screw or a bolt and a nut. When the first locking member 410 and the second locking member 430 are detachably attached to the extension leveler 230 so that the first locking member 410 and the second locking member 430 are worn or damaged. By repairing or replacing only the first locking member 410 and the second locking member 430, the repair can be easily completed.

The second receiving member 440 is detachably attached to the extension apron 220 by fixing portions 234 and 236 such as screws. Since the second receiving member 440 is detachably attached to the extension apron 220, when the second receiving member 440 is worn or damaged, only the second receiving member 440 can be repaired or replaced. The repair can be completed easily. The structure of the second receiving member 440 and the structure of the second locking member 430 and the second receiving member 440 in the locked state will be described later.

The stopper 460 is fixed below and in front of the leveler 130. The stopper 460 is provided at a position where the connecting portion 416 of the first locking member 410 can be locked when the extension leveler 230 rotates downward with respect to the leveler 130. The relationship between the stopper 460 and the first locking member 410 will be described later.

The structure of the second locking member 430 and the second receiving member 440 in the locked state will be described with reference to FIGS. 5A to 5D. FIG. 5A is a side view of the extension work part of the work machine before the work state according to the embodiment of the present invention as viewed from the work part side. FIG. 5B is a diagram showing the relationship between the second locking member and the second receiving member in the state of FIG. 5A. FIG. 5C is a cross-sectional view taken along the line AA'of FIG. 5B. FIG. 5D is a side view of the extension work unit of the work machine as viewed from the work unit side when a strong load is applied to the extension work unit in the state before the work state according to the embodiment of the present invention.

As shown in FIG. 5A, the extension leveler 230 rotates about the fixing portion 234 with respect to the extension apron 220. The second receiving member 440 is rotatably attached to the fixing portion 234 about the fixing portion 234. The second receiving member 440 is fixed to the extension apron 220 by the fixing portion 236. The angle of the extension leveler 230 with respect to the extension apron 220 is determined by the second locking member 430 being locked to the second receiving member 440 and the second receiving member 440 being fixed to the extension apron 220. This locked state is called the first locked state.

As shown in FIG. 5B, the second receiving member 440 is provided with openings 442, 444, 446. The second receiving member 440 has an auxiliary locking member 448. The opening 442 is substantially circular. The second receiving member 440 is rotatably attached to the extension apron 220 by the fixing portion 234 penetrating the opening 442 and fixing the second receiving member 440. The opening 444 is an opening having a shape in which the outer circumference of the second receiving member 440 is cut out. In the state before the working state, the second locking member 430 is locked to the side wall of the opening 444.

The opening 446 has an arc shape having a center in the opening 442. The fixing portion 236 penetrates the opening 446 to fix the second receiving member 440, so that the rotation of the second receiving member 440 with respect to the extension apron 220 is restricted. That is, the rotation of the extension leveler 230 with respect to the extension apron 220 is restricted by locking the second locking member 430 to the second receiving member 440. As shown in FIG. 5C, in the state shown in FIGS. 5A and 5B, the second locking member 430 penetrates the opening 444.

When a strong external force is applied to the extension leveler 230 in the state shown in FIGS. 5A to 5C, the angle of the second receiving member 440 with respect to the extension apron 220 is variable within the range of the opening 446. Specifically, as shown in FIG. 5D, when an external force is applied to the extension leveler 230 in the direction of the arrow, the second receiving member 440 is moved to a position where the end portion 450 of the opening 446 is locked to the fixing portion 236. It rotates with respect to the extension apron 220. Therefore, even when the angle of the extension leveler 230 with respect to the extension apron 220 is fixed, it is possible to prevent the above member from being damaged when a strong external force is applied to the extension leveler 230.

The structure of the first receiving member 420 will be described with reference to FIG. FIG. 6 is a side view of the working part of the working machine according to the embodiment of the present invention as viewed from the extended working part side. As shown in FIG. 6, the upper guide portion 424 of the first receiving member 420 extends along the rotation direction of the extension leveler 230 with respect to the leveler 130. The stopper 428 is provided substantially in the center of the storage portion 422. The stopper 460 is provided below the leveler 130. The shape of the stopper 460 is a cylindrical shape.

Next, with reference to FIGS. 7 and 8, a configuration in which the extension work unit 200 is deployed in the working state will be described. FIG. 7 is a top view showing a connecting structure of a working portion and an extension working portion of a working machine in a working state according to an embodiment of the present invention. FIG. 8 is a rear view showing a connecting structure of a working portion and an extension working portion of a working machine in a working state according to an embodiment of the present invention.

[Explanation of the first locked state]
As shown in FIGS. 7 and 8, when the extension work portion 200 is deployed in the working state, the connection portion 416 of the first locking member 410 is inserted into the storage portion 422 of the first receiving member 420. In this state, the connection portion 416 of the first locking member 410 is locked to the first receiving member 420, so that the rotation of the extension leveler 230 with respect to the leveler 130 is restricted. The connection portion 416 inserted into the storage portion 422 comes into contact with the stopper 428. When the extension leveler 230 approaches the leveler 130 while the connection portion 416 is in contact with the stopper 428, the first locking member 410 is pushed in the direction opposite to the D1 direction with respect to the extension leveler 230. As the first locking member 410 moves, the second locking member 430 also moves in the opposite direction to the D1 direction. In other words, when the extension work unit 200 is deployed in the working state, the first locking member 410 and the second locking member 430 slide with respect to the extension leveler 230. In this state, the elastic member 470 is compressed by the stopper 418, so that the connecting portion 416 is strongly pressed against the stopper 428.

In the first locking state, when the extension working portion 200 is deployed in the working state, the first locking member 410 is first locked so as to be inserted between the upper member 4220 and the lower member 4222. The member 410 and the first receiving member 420 are arranged. Preferably, the first locking member 410 is inserted between the upper member 4220 and the lower member 4222 so as not to come into contact with each other.

As described above, the connecting portion 416 of the first locking member 410 is inserted into the accommodating portion 422 of the first receiving member 420, and the first locking member 410 and the first receiving member 420 are connected by connecting them. The mechanical strength of the structure can be improved.

FIG. 9A is a side view of the extension working portion of the working machine in the working state according to the embodiment of the present invention as viewed from the working portion side. FIG. 9B is a diagram showing the relationship between the second locking member and the second receiving member in the state of FIG. 9A. 9C is a cross-sectional view taken along the line AA'of FIG. 9B. As described above, when the extension work unit 200 is deployed in the working state, the second locking member 430 moves in the direction opposite to the extension leveler 230 in the D1 direction. Therefore, as shown in FIG. 9C, the second locking member 430 detaches from the opening 444. That is, the locking of the second locking member 430 to the second receiving member 440 is released. As a result, the extension leveler 230 becomes rotatable with respect to the extension apron 220. In other words, when the extension work unit 200 is in the working state, the first locking member 410 is locked to the first receiving member 420, so that the rotation of the extension leveler 230 with respect to the leveler 130 is restricted, and the second locking is performed. When the member 430 is detached from the second receiving member 440, the rotation restriction of the extension leveler 230 with respect to the extension apron 220 is released. Comparing FIGS. 5A and 9A, the positions of the extension apron 220 and the second receiving member 440 are the same, only the angle of the extension leveler 230 with respect to the extension apron 220 is different.

[Explanation of the second locked state]
The second locked state will be described with reference to FIGS. 10 to 11C. The second locking state is a state in which the second locking member 430 is locked to the second receiving member 440 at a position different from that of the first locking state.

FIG. 10 is a top view showing a connecting structure of a working portion and an extension working portion of a working machine before a working state according to an embodiment of the present invention. FIG. 10 is similar to FIG. 3, but differs from FIG. 3 in that the second locking member 430 does not penetrate the second receiving member 440. In the state shown in FIG. 10, for example, in the state shown in FIG. 3, the first locking member 410 moves in the opposite direction to the D1 direction by an external force, and the second locking member 430 is about to be detached from the second receiving member 440. Corresponds to the state.

FIG. 11A is a side view of the extension work unit of the work machine before the work state according to the embodiment of the present invention as viewed from the work unit side. FIG. 11B is a diagram showing the relationship between the second locking member and the second receiving member in the state of FIG. 11A. FIG. 11C is a cross-sectional view taken along the line AA'of FIG. 11B. The extension leveler 230 of FIG. 11A is stationary at a position slightly rotated downward as compared with the extension leveler 230 of FIG. 5A. The positions of the extension apron 220 and the second receiving member 440 in FIG. 11A are the same as those positions in FIG. 5A. As shown in FIGS. 11B and 11C, the second locking member 430 detaches from the opening 444 and is locked to the upper surface 4482 of the auxiliary locking member 448. In other words, the second locking member 430 locks to the second receiving member 440 in two states where the angle of the extension leveler 230 with respect to the extension apron 220 is different. The second locking member 430 may be locked to the second receiving member 440 in a state where the angle of the extension leveler 230 with respect to the extension apron 220 is three or more different.

In other words, the second locking member 430 locks to the second receiving member 440 at two or more different positions in the movable direction of the second locking member 430 with respect to the extension leveler 230. By having this configuration, the extension leveler 230 is extended even when the second locking member 430 is detached from the first locking state (the state in which the second locking member 430 penetrates the opening 444). It is possible to prevent the apron 220 from being in a state where it can rotate freely.

In this state, the second locking member 430 is acted on in the D1 direction by the elastic member 470. When the extension leveler 230 rotates while the second locking member 430 is pressed against the first surface 4402 side of the second receiving member 440, the second locking member 430 slides with the second receiving member 440. Therefore, in the state shown in FIGS. 11A to 11C, when the extension leveler 230 rotates upward and the position of the second locking member 430 is aligned with the position of the opening 444, the second locking member 430 closes the opening 444. It penetrates and becomes the state shown in FIGS. 5A to 5C.

[Explanation of storage status]
In the above, the working state in which the extension working unit 200 is deployed, or the state in which the extension working unit 200 is slightly rotated with respect to the working unit 100 from the working state has been described. Hereinafter, the stored state in which the extension work unit 200 is folded will be described. FIG. 12A is a side view of the extension work portion of the work machine before the work state according to the embodiment of the present invention as viewed in the direction of the work portion. FIG. 12B is a diagram showing the relationship between the second locking member and the second receiving member in the state of FIG. 12A. FIG. 12C is a cross-sectional view taken along the line AA'of FIG. 12B. Since the drawing shown in FIG. 12A is in a state where the extension work unit 200 is housed, the figure shown in FIG. 11A is upside down from the figure shown in FIG. 11A. However, for convenience of explanation, the vertical direction of FIGS. 12B and 12C is displayed in accordance with the vertical direction of FIGS. 11B and 11C. The state shown in FIGS. 12A to 12C is a state in which the second locking member 430 is about to be detached from the second receiving member 440, similarly to the state shown in FIGS. 11A to 11C.

The direction of gravity applied to the extended leveler 230 in the retracted state is opposite to the direction of gravity applied to the extended leveler 230 in the working state. Therefore, when the second locking member 430 is detached from the second receiving member 440 in the retracted state, the direction in which the extension leveler 230 rotates from the first locking state shown in FIG. 5A is the rotation shown in FIG. 11A. The direction is opposite. In this state, the second locking member 430 is not locked to the second receiving member 440, but the extension leveler 230 is rotated by partially locking the extension leveler 230 to a part of the extension apron 220. Is stationary.

Even in this state, the extension leveler 230 rotates while the second locking member 430 is pressed against the first surface 4402 side of the second receiving member 440, so that the second locking member 430 is the second receiving member 440. Sliding with. Therefore, in the state shown in FIGS. 12A to 12C, when the extension leveler 230 rotates upward in FIG. 12A and the position of the second locking member 430 is aligned with the position of the opening 444, the second locking member 430 opens. It penetrates the portion 444 and is in the state shown in FIGS. 5A to 5C.

[Explanation of stopper 460]
The stopper 460 provided on the leveler 130 will be described with reference to FIG. FIG. 13 is a rear view showing a connecting structure of a working portion and an extension working portion of a working machine before a working state according to an embodiment of the present invention. The state shown in FIG. 13 is a state in which the extension leveler 230 is rotated downward with respect to the leveler 130.

For example, in a state where the first locking member 410 is not normally connected to the first receiving member 420, that is, in a state where the connecting portion 416 is not inserted into the storage portion 422, the first locking member 410 is in the opposite direction in the D1 direction. When pushed into, the second locking member 430 detaches from the second receiving member 440. As a result, the extension leveler 230 becomes rotatable with respect to the extension apron 220. If the extension leveler 230 becomes rotatable with respect to the extension apron 220 while the first locking member 410 is not connected to the first receiving member 420, the extension leveler 230 will rotate downward due to its own weight. .. However, by locking the first locking member 410 to the stopper 460, the downward rotation of the extension leveler 230 is restricted.

In FIG. 13, the connecting portion 416 of the first locking member 410 is locked to the stopper 460 from above the stopper 460, so that the extension leveler 230 rotates downward from the state of FIG. 13 with respect to the leveler 130. Is regulated. The first locking member 410 is pressed against the side wall 134 of the leveler 130. The side wall 134 is located on the extension leveler 230 side of the lower guide portion 426. With these configurations, when the extension leveler 230 is rotated upward in the state shown in FIG. 13, the first locking member 410 is connected to the first receiving member 420 at a normal position, and the state shown in FIG. 8 is obtained. .. In addition, since the area of the first locking member 410 to be locked to the stopper 460 can be widened by configuring the connecting portion 416 to be locked to the stopper 460, the stopper 460 of the first locking member 410 can be widened. Locking error can be suppressed.

As described above, according to the working machine 10 according to the first embodiment of the present invention, the second locking member 430 is locked to the second receiving member 440 before the extension leveler 230 is deployed in the working state. In the state where the rotation of the extension leveler 230 with respect to the extension apron 220 is restricted and the extension leveler 230 is deployed in the working state, the first locking member 410 comes into contact with the first receiving member 420 to bring the extension leveler 230 to the leveler 130. The rotation of 230 is restricted. That is, the regulation of the extension leveler 230 for the extension apron 220 and the regulation of the extension leveler 230 for the leveler 130 can be automatically switched.

The first locking member 410 and the first receiving member 420, and the second locking member 430 and the second receiving member 440 are detachably attached to each other, so that when these members are worn or damaged, the above Repairs can be easily completed by repairing or replacing only the members of. Further, since the first locking member 410 and the second locking member 430 are interlocked and each of them is movable with respect to the extension leveler 230, the first locking member and the extension leveler 230 are separated from the rotational operation of the first locking member 410 and the extension leveler 230. The above regulation can be switched by the operation of the locking member 410 and the second locking member 430.

When the first locking member 410 is detached from the first receiving member 420 and the second locking member 430 slides with a part of the second receiving member 440 to release the locked state once. Even if there is, it can be automatically returned to the locked state depending on the relative positions of the extension leveler 230 and the second receiving member 440.

In a state where the first locking member 410 is detached from the first receiving member 420, the second locking member 430 is locked to the second receiving member 440 in a state where the angle of the extension leveler 230 with respect to the extension apron 220 is different. By doing so, even when the second locking member 430 is detached from the opening 444, it is possible to prevent the extension leveler 230 from rotating downward with respect to the extension apron 220.

Since the leveler 130 is provided with the stopper 460, the second locking member 430 is extended even if the second locking member 430 is disengaged from the second receiving member 440 in a state where the first locking member 410 is not connected to the first receiving member 420. It is possible to prevent the leveler 230 from rotating downward due to its own weight.

<Embodiment 2>
The working machine according to the second embodiment of the present invention will be described with reference to FIGS. 14, 15A, and 15B. Since the working machine 10A according to the second embodiment is similar to the working machine 10 according to the first embodiment, the description of having the same configuration and function will be omitted, and the differences will be described.

FIG. 14 is a rear view showing a connecting structure of a working portion and an extension working portion of a working machine before a working state according to an embodiment of the present invention. The structure of the connecting portion 400A shown in FIG. 14 is similar to the structure of the connecting portion 400 of FIG. 8, but the shape of the stopper 428A of the connecting portion 400A is different from the shape of the stopper 428 of the connecting portion 400.

15A and 15B are enlarged rear views showing a connecting structure of a working portion and an extension working portion of a working machine immediately before a working state according to an embodiment of the present invention. As shown in FIGS. 15A and 15B, the stopper 428A is inclined in a direction that guides the first locking member 410A downward. In other words, the stopper 428A is inclined downward with respect to the plane orthogonal to the direction in which the first locking member 410A is pressed by the elastic member 470A in the working state. In other words, the inclined surface of the stopper 428A in contact with the first locking member 410A faces the direction of the first locking member 410A and the direction of the leveler 130A.

As described above, since the stopper 428A has an inclined surface, the force that the first locking member 410A is pressed against the stopper 428A by the elastic member 470A is the force that guides the first locking member 410A downward by the stopper 428A. Is converted to. As a result, the first locking member 410A is pressed downward, so that the positional relationship between the first locking member 410A and the first receiving member 420A is stabilized. As a result, the interlocking of the leveler 130A and the extended leveler 230A is increased, and the noise when both are interlocked can be reduced.

Although FIGS. 15A and 15B illustrate a structure in which the first locking member 410A is pressed downward by the stopper 428A, the structure is not limited to this structure. For example, the inclined surface of the stopper 428A may be inclined upward, and the first locking member 410A may be pressed upward by the stopper 428A. Further, the inclined surface of the stopper 428A may be inclined not only in the vertical direction but also in the horizontal direction.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit.

10: Work machine, 100: Work part, 110: Shield cover, 120: Apron, 122, 132, 222, 232, 311, 312, 320: Connection part, 130: Leveler, 134: Side wall, 200: Extension work part, 210: Extension shield cover, 220: Extension apron, 230: Extension leveler, 234, 236: Fixed part, 300: Switching part, 310: Control cylinder, 400: Connecting part, 410: First locking member, 412: First Columnar part, 414: Second columnar part, 416: Connection part, 418: Stopper, 420: First receiving member, 422: Storage part, 424: Upper guide part, 426: Lower guide part, 428: Stopper, 430: First 2 locking member, 432: fixing part, 440: second receiving member, 442, 444, 446: opening, 448: auxiliary locking member, 450: end, 460: stopper, 470: elastic member, 500: leveler Control unit, 510: Leveler expansion unit, 520: Earth gathering plate, 600: Rotor unit, 610: Work claw, 612: Rotation range, 620: Power unit, 4220: Upper member, 4222: Lower member, 4402: First surface , 4482: Top surface

Claims (12)

A first work unit having a first cover member provided behind the first work rotor for rotating the work claw, and a first leveling member rotatably connected to the first cover member.
A second cover member, which is connected to the first working portion so as to be able to switch between a stored state and a working state, and is provided behind a second working rotor that rotates a working claw in the working state, and the second cover member. A second working unit having a second ground leveling member rotatably connected,
The first receiving member attached to the first leveling member and
The first locking member attached to the second leveling member and
The second receiving member attached to the second cover member and
The second locking member attached to the second leveling member and
Have,
In the working state, the rotation of the second leveling member with respect to the first leveling member is restricted by locking the first locking member to the first receiving member.
In the stored state, the second locking member is locked to the second receiving member, so that the rotation of the second leveling member with respect to the second cover member is restricted.
Wherein the first locking member and the second locking member, interlocked, and Ri movable der to said second ground leveling member,
The angle of the second leveling member with respect to the second cover member is different so as to restrict the rotation of the second leveling member in the same direction when the first locking member is detached from the first receiving member. in two or more states, the working machine and the second locking member that abolish engaged with the second receiving member. A claim that when the second working portion is in the working state, the second locking member is disengaged from the second receiving member, and the second leveling member is rotatable with respect to the second cover member. The working machine according to 1. In a state where the first locking member is disengaged from the first receiving member, the second locking member slides with a part of the second receiving member, so that the second covering member has the second cover member. 2. The working machine according to claim 1 or 2, wherein the leveling member can rotate. The first receiving member has a first stopper.
The work machine according to any one of claims 1 to 3, wherein in the working state, the second locking member comes off from the second receiving member when the first locking member comes into contact with the first stopper. .. Further having an elastic member acting on the second leveling member and the first locking member,
The working machine according to claim 4 , wherein in the working state, the first locking member is pressed toward the first receiving member by the elastic member. The first stopper has an inclined surface that is inclined with respect to a surface orthogonal to the direction in which the first locking member is pressed in the working state.
The working machine according to claim 5 , wherein the first locking member pressed by the elastic member is pressed against the inclined surface in the working state. The first locking member has a first columnar portion and a second columnar portion having a length in the first direction, and a connecting portion connecting the first columnar portion and the second columnar portion.
The working machine according to any one of claims 1 to 6, wherein the rotation of the second leveling member with respect to the first leveling member is restricted by engaging the connecting portion with the first receiving member. The second locking member has a length in the first direction and has a length.
The working machine according to claim 7 , wherein the first columnar portion and the second locking member are fixed by a fixing portion. The first leveling member has a second stopper.
The working machine according to any one of claims 1 to 8, wherein the rotation of the second leveling member with respect to the first leveling member is restricted by locking the first locking member to the second stopper. .. The working machine according to claim 9 , wherein the rotation of the second leveling member with respect to the first leveling member is restricted by engaging the connecting portion with the second stopper. The first receiving member is removable from the first leveling member, and is removable.
The working machine according to any one of claims 1 to 10, wherein the first locking member and the second locking member are detachable from the second leveling member. The working machine according to any one of claims 1 to 11, wherein the second receiving member is removable from the second cover member.

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