JP5214582B2 - Rotary tiller - Google Patents

Description

  The present invention relates to a rotary tiller that is attached to a towing vehicle such as a tractor to plow a field.

Conventionally, there is a rotary tiller disclosed in Patent Document 1. This rotary cultivator is equipped with a machine frame attached to the rear part of the tractor via a three-point link mechanism, a cultivating part for cultivating the field, a cultivating cover for covering the cultivating part, and a farming implement such as a gauge ring and a cultivator. And a swinging support frame to which is attached.
The machine frame has left and right support frames projecting from the gear case, the upper part of the transmission case is attached and fixed to the protruding end of the left support arm, and the upper part of the side frame is attached and fixed to the protruding end of the right support arm. It is configured in a gate shape.

  The tillage section includes a claw shaft rotatably supported around the left and right axis between the transmission case of the machine frame and the lower part of the side frame, and a plurality of tillage claws attached on the claw shaft. The power input to the provided PIC shaft is transmitted to the transmission shaft in the left support arm via a bevel gear transmission mechanism provided in the gear case, and the claw shaft is transmitted from the transmission shaft to the chain transmission mechanism in the transmission case. And the claw shaft is rotationally driven.

The tillage cover includes an upper cover that covers the top of the tillage portion and a rear cover that covers the rear of the tillage portion. It can be moved up and down around the left and right axis.
The swing support frame includes a pair of left and right support arms whose front end is pivotally connected to each of the left and right support frames so as to be pivotable about the left and right axes, a connecting rod that connects a middle part in the front-rear direction of the left and right support arms, and a left and right support It has a left and right tool bar fixed to the rear end of the arm.

A gauge ring and a cultivator are attached to the toolbar of the swing frame.
The earthenware is supported by the tool bar so that it can rotate around the left and right axes, and can be repositioned between a working position for ground work and a non-working position that is turned upward around the left and right axes. Has been.
This earthenware can be freely rotated up and down by an elevating operation device, and the elevating operation device rotates a rotary operation rod that is rotated around an axis to raise and lower the earthenware, and rotationally drives the rotation operation rod. And an electric motor for rotating the rotary operation rod with the electric motor to reduce the labor for raising and lowering the earthenware.

JP 2008-72957 A

In the rotary cultivator, the movable parts that are raised and lowered include not only a cultivator but also a swing support frame and a rear cover. These swing support frame and rear cover also reduce the labor of the operator. In order to achieve this, it is considered that the electric motor is driven up and down by the driving force.
In this case, from the viewpoint of cost reduction and weight reduction, it is preferable to use one electric motor for each lifting operation device that raises and lowers the movable part. However, when replacing the electric motor, the electric motor It is important to make it easy to attach and detach.

Moreover, even when there is a single movable part, it is desirable to be able to remove the electric motor from the lifting operation device as necessary so that the movable part does not move detourly.
Then, this invention makes it a subject to provide the rotary tiller which can attach or detach easily the electric motor for raising / lowering the movable part of a rotary tiller.

The technical means taken by the present invention in order to solve the technical problem includes a movable part that is raised and lowered, and a movable part operating device for raising and lowering the movable part. A rotary operation rod that is rotated around the shaft core to raise and lower the movable part is provided, and an output of the electric motor is provided on one end side in the axial direction of the rotation operation rod to rotate the rotation operation rod by the power of the electric motor. In the rotary cultivator provided with a fitting part for fitting the shaft so as to be detachable,
It is pivotally supported on the electric motor side and swings in a state where the output shaft is fitted in the fitting portion, so that the retaining portion provided on the movable portion operating device side can be freely engaged and disengaged. And an engagement member that prevents the output shaft from coming off from the fitting portion,
In addition, the output of the main body portion of the electric motor by the fitting operation of the output shaft to the fitting portion or the engaging operation of the engaging member to the retaining portion between the electric motor side and the movable portion operating device side. A rotation restricting means for restricting rotation around the shaft axis is provided.

According to this, it is possible to easily prevent the output shaft of the electric motor from coming off and to prevent the main body portion of the electric motor from rotating around the output shaft axis, and the electric motor can be attached and detached.
In addition, the output shaft of the electric motor is configured to be fitted to and detached from the fitting portion in the axial direction of the output shaft, and the engaging member is an axial core parallel to a direction orthogonal to the axial center of the output shaft It is preferable that the fitting member is formed with a fitting hole that is detachably fitted to the retaining portion.

According to this, the electric motor is moved in the axial direction of the output shaft while the engaging member is swung away from the output shaft, and the output shaft is fitted into the fitting portion. By swinging the combined member in the direction close to the output shaft and fitting the fitting hole into the retaining portion, the electric motor can be prevented from coming off, and the workability of attaching / detaching the electric motor is good.
Further, the rotation restricting means is composed of a rotation restricting member provided along the axial direction of the output shaft on the electric motor side, and a rotation stopping portion provided on the movable part operating device side,
When the output shaft is fitted to the fitting portion in the axial direction, the rotation restricting member is engaged with the rotation preventing portion to restrict the rotation of the body portion of the electric motor around the output shaft axis. It is good to be.

According to this, when the electric motor is moved in the axial direction of the output shaft and the output shaft is fitted into the fitting portion, the rotation of the main body portion of the electric motor around the output shaft axis can be achieved at the same time. Good workability for attaching and detaching the motor.
Further, the rotation restricting means is constituted by the engaging member and a rotation stopping portion provided on the movable portion operating device side,
When the engagement member is engaged with the retaining portion, the engagement member is preferably engaged with the rotation preventing portion to restrict the rotation of the body portion of the electric motor around the output shaft axis. .

  According to this, when the output shaft of the electric motor is fitted into the fitting portion and then the engaging member is engaged with the retaining portion, the rotation around the output shaft axis of the main body portion of the electric motor can be simultaneously achieved. The workability of attaching and detaching the electric motor is good. In addition, the number of members can be reduced, leading to cost reduction.

  According to the present invention, it is possible to fit the output shaft of the electric motor only by fitting the output shaft of the electric motor to the fitting portion of the rotary operating rod and swinging the engaging member to engage the retaining portion. It can be prevented from coming off from the part, and the rotation around the output shaft axis of the electric motor can be restricted, and the engagement member can be swung to release the engagement with the retaining part and the output shaft can be detached from the fitting part. The electric motor can be removed simply by making it possible to easily attach / remove the electric motor to / from the movable portion operating device.

It is a side view of a rotary tiller. It is a side view of a state where a rotary cultivator is mounted on a tractor. It is a back perspective view of a rotary tiller. It is a rear view of the machine frame upper center side. It is side surface sectional drawing of a bouncing apparatus. It is a top view of the state which mounted | wore the armoring device with the drive device. It is a front view of the state where the drive unit was mounted on the armpit device. It is side surface sectional drawing of the state which mounted | wore with the drive device to the armpit apparatus. It is a perspective view of a drive device. It is a perspective view of a drive device. FIG. 4A is a partial cross-sectional view of a plan view of the drive device, and FIG. It is a front view of a drive device. It is a side view of the state which attached the gauge ring to the rocking | fluctuation frame. It is side surface sectional drawing of a height adjustment apparatus. It is a top view of the state which mounted | wore the height adjusting device with the drive device. It is a front view of the state which attached the drive device to the height adjustment apparatus. It is side surface sectional drawing of the state which mounted | wore the height adjusting device with the drive device. FIG. It is a plane sectional view of the front part of an earthenware operation device. It is a top view of the state which mounted | wore the cultivator operating device with the drive device. It is side surface sectional drawing of the state which mounted | wore the earthenware operation apparatus with the drive device. (A) is a side view of the holding member in the attached state, and (b) is a plan view of the holding member in the attached state. It is a side view in the state where the drive device was held on the holding member. It is a back surface sectional view in the state where the drive device was held to the holding member. It is a plane schematic diagram in the state where the drive device was held on the holding member. It is the top view and side sectional view concerning a modification. It is a plane schematic diagram concerning other modifications.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3, reference numeral 1 denotes a rotary cultivator that is attached to a rear portion of a towing vehicle such as a tractor 2 via an attachment mechanism such as a three-point link mechanism 3 so as to be movable up and down.
This rotary cultivator 1 includes a machine frame 4 attached to a tractor 2 via a three-point link mechanism 3, a cultivating section 5 for cultivating soil, a cultivating cover 6 covering the cultivating section 5, a gauge ring 7 and a cultivation soil. And a swing support frame 9 to which agricultural equipment such as a vessel 8 is attached.

The three-point link mechanism 3 includes an upper top link 11 and a pair of lower left and right lower links 12. The front link 11 and the front end sides of the left and right lower links 12 are pivotally attached to the tractor 2 side. A connecting frame 13 is attached to the rear ends of the top link 11 and the left and right lower links 12.
In this embodiment, a side drive type rotary cultivator 1 is illustrated, and the machine frame 4 extends from the gear case 14 at the center in the left-right direction to the left and right sides and to the extension end of the left support arm 15. The upper part of the transmission case 16 is attached, and the upper part of the side frame 17 is attached to the extended end of the right support arm 15 so as to be mainly configured in a gate shape.

A top mast 18 is provided on the upper part of the gear case 14 so as to project upward. The top mast 18 is formed in a fore-and-aft shape. An upper connection pin 19 that engages from the lower side (or the rear end side of the top link 11 is directly pivotally connected) is provided.
As shown in FIG. 4, each of the left and right support arms 15 is provided with a connection bracket 20, and a lower connection portion of the lower portion of the connection frame 13 is connected to the front portion of each connection bracket 20 from the rear side. A lower connection pin 21 is provided (or the rear end side of the lower link 12 is directly pivotally connected).

The cultivating unit 5 includes a claw shaft 22 that is rotatably supported around the axis in the left-right direction between the lower part of the transmission case 16 and the side frame 17 and a plurality of cultivating claw 23 attached to the claw shaft 22. It is configured.
The power transmitted from the PTO shaft 24 of the tractor 2 to the PIC shaft 26 of the gear case 14 via the joint shaft 25 is input to the bevel gear transmission mechanism in the gear case 14 and transmitted from the bevel gear transmission mechanism to the left support arm 15. The shaft is transmitted to the claw shaft 22 through a chain transmission mechanism in the transmission case 16, and the claw shaft 22 is rotationally driven in the direction of arrow A, so that the tillage unit 5 is rotationally driven.

The tillage cover 6 includes an upper cover 27 that covers the top of the tillage unit 5 and a rear cover 28 that covers the back of the tillage. The rear cover 28 is pivotally supported on the rear end side of the upper cover 27 via a pivotal support shaft 29 so as to be pivotable about a left and right axis, and around the pivotal support shaft 29. It can be swung up and down.
In the present embodiment, the rear cover 28 has a cover main body whose upper end is pivotally supported via the rotation support shaft 29, and a leveling cover detachably attached to the lower end of the cover main body.

Further, the rear cover 28 is grounded at the lower end side and leveles the farm field plowed by the tiller 5.
A front bracket 31 is provided on each of the left and right support arms 15, and a pair of left and right rear brackets 32 are provided on the back surface of the rear cover 28 corresponding to the left and right front brackets 31. Further, the lowering devices 33L and 33R for urging the rear cover 28 downward (in the grounding direction) are provided over the rear bracket 32.

The front bracket 31 is composed of left and right side walls 31 a fixed at the lower end side to the support arm 15, and a connecting wall 31 b that connects the lower side of the rear edge of the left and right side walls 31 a. Has been placed.
Note that the front bracket 31 may be formed only of the left and right side walls 31a (plate material).
The rear bracket 32 is composed of a pair of left and right plate members.

  5 to 8, the left (right and left) retractor 33 </ b> L includes a front holder 34 that is supported by the front bracket 31 so as to be rotatable about a horizontal axis, and a left and right shaft that is supported by the rear bracket 32. A rear holder 35 rotatably supported around the core, a support rod 36 formed of a cylinder (cylindrical body) provided between the front holder 34 and the rear holder 35, and the front holder 34 in the support rod 36 A rotary operation rod 38 which is accommodated across the rear holder 35 and has a male screw portion 37 on the rear side, and a stopper 39 which is screwed onto the male screw portion 37 of the rotation operation rod 38 on the rear side of the rear holder 35; A spring receiving member 40 that is externally fitted to the support rod 36 so as to be able to change the position in the axial direction, and a biasing spring 41 that is a coil spring that is fitted to the support rod 36 between the spring receiving member 40 and the rear bracket 32. And have.

The front holder 34 has a cylindrical (cylindrical) holder body 42 disposed between the left and right side walls 31a of the front bracket 31 so that the axial direction is perpendicular to the left and right direction and crosses in the vertical direction, and the holder body 42 And a support shaft 43 penetrating the left and right side walls 31a of the front bracket 31 in the left-right direction, and a bearing 44 accommodated in the holder main body 42 on the front side of the support shaft 43.
The rear end side of the holder main body 42 is formed in an expanded shape, and the front end side of the support rod 36 is inserted and fixed to the rear end side of the holder main body 42. The left and right sides of the support shaft 43 of the front holder 34 are supported by the left and right side walls 31a of the front bracket 31 so as to be rotatable about the left and right axis, and the holder main body 42 is integrally rotatable with the support shaft 43. Yes.

Reinforcing portions 45 that bulge left and right from the center in the left-right direction are provided in the upper and lower portions of the holder main body 42 of the front holder 34 through the support shaft 43.
The upper surface of the upper reinforcing portion 45 and the lower surface of the lower reinforcing portion 45 are formed as flat surfaces along the left-right direction and the axial direction of the holder main body 42.
Further, a square block-shaped retaining portion 46 is provided on the upper surface side of the front holder 34, and this retaining portion 46 is disposed at the center in the left-right direction of the rear portion of the upper reinforcing portion 45. Further, the left-right width of the retaining portion 46 is formed narrower than the left-right width of the upper reinforcing portion 45.

The rear holder 35 includes a cylindrical (cylindrical) holder body 47 disposed between the left and right plate members constituting the rear bracket 32 so that the axial direction is orthogonal to the left-right direction and crosses the vertical direction, and the holder The main body 47 includes support shafts 48 provided on both the left and right sides.
A rear portion of the support rod 36 is inserted into the holder main body 47 of the rear holder 35 from the front side of the holder main body 47 so as to be relatively movable in the axial direction, and the rear end side of the support rod 36 is rearward of the holder main body 47. It has a protruding shape. Further, the support shaft 48 is supported by a plate material constituting the rear bracket 32 on the same side in the left-right direction so as to be rotatable around the axis in the left-right direction, and the holder body 47 can be rotated around the support shaft 48. Has been.

The rotation operation rod 38 is inserted into the support rod 36 concentrically. Further, the front portion of the rotation operation rod 38 is inserted through the support shaft 43 and the bearing 44 of the front holder 34 from the rear side, and is supported by the front holder 34 so as to be rotatable around the axis. The rear end portion of the rotation operation rod 38 is located in the vicinity of the rear end of the support rod 36 and in the support rod 36.
The front end side of the rotary operating rod 38 protrudes forward from the holder main body 42 of the front holder 34, and a fitting member 49 is provided at the protruding portion.

The fitting member 49 is formed in a cylindrical shape, and the rear side of the fitting member 49 is externally fitted to the front end side of the rotary operating rod 38 and is attached to be rotatable integrally with a pin.
The movement of the rotary operation rod 38 in the axial direction relative to the front holder 34 is restricted by the fitting member 49 and the pin 51 penetrating the rotation operation rod 38 on the rear side of the support shaft 43 of the front holder 34.

At the front part of the fitting member 49, a fitting part 52 made of an open hexagonal hole is formed on the front side so as to be concentric with the rotary operation rod 38.
The stopper 39 is fitted to the support rod 36 from the rear end side so as to be movable in the axial direction and non-rotatably around the axial center, and is a female screw that is screwed into the male screw portion 37 of the rotary operation rod 38. Part 53.

The right (right and left) lowering device 33R includes a rear holder 35, a support rod 36 formed of a cylindrical body (cylindrical body) provided across the rear holder 35 and the front bracket 31, and an axial center on the support rod 36. A spring receiving member that is externally fitted so as to be capable of changing the directional position, and a biasing spring that is a coil spring that is fitted on the support rod 36 between the spring receiving member and the rear holder 35.
The rear holder 35 of the right-side descent device 33R is configured in the same manner as the rear holder 35 of the left-side descent device 33L. Further, the spring receiving member and the biasing spring of the right lowering device 33R are the same as the spring receiving member 40 and the biasing spring 41 of the left lowering device 33L, and are not shown.

The front end side of the support rod 36 of the right armoring device 33R is supported by the front bracket 31 so as to be rotatable around the axis in the left-right direction and not movable in the axis direction. The rear portion of the support rod 36 is inserted into the holder main body 47 of the rear holder 35 so as to be relatively movable in the axial direction.
A stopper (not shown) that contacts the rear holder 35 is provided on the rear end side of the support rod 36.

In the lowering devices 33L and 33R configured as described above, the rear cover 35 can move up and down around the pivot shaft 29 by moving the rear holder 35 on the support rod 36 in the axial direction. The lower end side of the rear cover 28 is urged in the grounding direction by the urging spring 41, and the spring force of the urging spring 41 can be adjusted by changing the position of the spring receiving member 40.
Further, when the rotation operation rod 38 of the left lowering device 33L is rotated so that the stopper 39 screwes the male screw portion 37 forward, the rear cover 28 is lifted upward around the rotation support shaft 29. When the rotation of the rotary operation rod 38 is stopped, the rear cover 28 is held at the lifted position. Further, when the rotation operating rod 38 is rotated so that the stopper 39 retreats the male screw portion 37 backward, the rear cover 28 is lowered.

The rear cover 28 is a movable part that is provided in the rotary tiller 1 and is raised and lowered, and the movable part operating device for raising and lowering the movable part is the left abutment device 33L.
Moreover, in the rotary tiller 1 of this embodiment, in order to reduce the labor of raising / lowering the rear cover 28 (movable part), the drive device 57 which has the electric motor 56 is equipped.
As shown in FIGS. 9 to 12, the drive device 57 is engaged with the electric motor 56 that is a drive source, the engagement member 58 that engages with the retaining portion 46 of the left-side abutment device 33 </ b> L, and the front bracket 31. A rotation restricting member 59 and a cover member 60 are provided.

The electric motor 56 includes a motor main body 61 that is a main body portion that generates rotational power in a freely rotating manner, an output shaft 62 that outputs the rotational power of the motor main body 61, and the rotational power of the motor main body 61 transmitted to the output shaft 62. A transmission casing 63 that houses a transmission mechanism (deceleration mechanism).
The transmission casing 63 is attached and fixed to one end side in the output direction of the rotational power of the motor body 61. The output shaft 62 protrudes from the transmission casing 63 in a direction perpendicular to the output direction of the rotational power of the motor body 61, and the output shaft 62 is rotatably supported by the transmission casing 63.

The output shaft 62 includes a base portion 64 that is rotatably supported by the transmission casing 63, and a mounting portion that integrally extends from the base portion 64 in the axial direction of the output shaft 62 (direction protruding from the transmission casing 63). 65 and a cylindrical fitting shaft 66 that is externally fitted to the mounting portion 65 so as to be rotatable together and is prevented from being removed.
The fitting shaft 66 of the output shaft 62 is formed in the shape of a hexagonal column whose outer peripheral surface is concentric with the axis of the output shaft 62, and the fitting shaft 66 of the rotary operation rod 38 of the left-hand abutment device 33L. The fitting portion 52 provided on the front end side can be fitted in concentrically from the front side in the axial direction of the rotary operation rod 38. By fitting the fitting shaft 66 into the fitting portion 52, rotational power can be transmitted from the output shaft 62 to the rotation operation rod 38, and the rotation operation rod 38 can be rotated around the axis. .

The transmission casing 63 is provided with a plurality of columnar mounting portions 67 that protrude from the transmission casing 63 in the protruding direction of the output shaft 62 and are located around the base portion 64 of the output shaft 62. On the side, a base plate 68 is attached and fixed by bolts 69 so that the plate thickness direction coincides with the axial direction of the output shaft 62.
In the illustrated example, three attachment portions 67 are provided and are arranged at equal intervals in the circumferential direction of the output shaft 62.

A shaft insertion hole 70 through which the fitting shaft 66 of the output shaft 62 can be inserted is formed in the base plate 68, and the output shaft 62 is inserted through the shaft insertion hole 70.
The engaging member 58 and the rotation restricting member 59 are provided around the fitting shaft 66.
A pair of rotation restricting members 59 are provided and formed integrally with the base plate 68.
The pair of rotation restricting members 59 extends from the base plate 68 in the protruding direction of the output shaft 62 (the thickness direction of the base plate 68), and is orthogonal to the axial direction of the output shaft 62 so as to sandwich the fitting shaft 66 therebetween. (The thickness direction of the pair of rotation restricting members 59 coincides with the opposing direction).

The rotation restricting member 59 protrudes in the axial direction of the output shaft 62 from the protruding end of the output shaft 62.
The engaging member 58 is formed of a plate material, and is disposed adjacent to the side of the fitting shaft 66 in a direction perpendicular to the axial direction of the output shaft 62 and also perpendicular to the direction of the rotation restricting member 59.
The engaging member 58 is formed longer in the axial direction of the output shaft 62, and protrudes in the axial direction of the output shaft 62 than the protruding end of the output shaft 62.

On the other hand, the base plate 68 is integrally formed with a pair of pivot walls 71 opposed to each other in a direction parallel to the facing direction of the rotation restricting member 59. A pivotal support wall 72 located inside is integrally formed.
A pivot shaft 73 penetrating the pair of pivot walls 71 and the pair of pivot walls 72 is provided, and the engaging member 58 is connected to the pivot wall 71 via the pivot shaft 73 and the shaft of the output shaft 62. It is swingably supported around an axis parallel to the direction orthogonal to the core direction.

The engagement member 58 includes a finger hook portion 74 that is bent in an inclined manner from the distal end side toward the base portion side, a fitting hole 75 that is detachably fitted to the retaining portion 46, and a second portion. The fitting holes 76 are formed side by side.
A spring member 77 made of a torsion coil spring is fitted over the pivot shaft 73. One end side of the spring member 77 is in contact with the base plate 68, and the other end side is in contact with the engagement member 58, and urges the engagement member 58 in a direction to approach the fitting shaft 66.

Further, the engaging member 58 is brought into contact with the fitting shaft 66 and the like so that the swinging in the urging direction is restricted.
The cover member 60 is attached by sandwiching one side wall 60a of the cover member 60 between the mounting portion 67 of the transmission casing 63 and the base plate 68, and two surfaces adjacent to the one side wall 60a are open. Yes.

On the one side wall 60 a of the cover member 60, a notch 78 for passing the base portion 64 of the output shaft 62 is formed.
In order to raise and lower the rear cover 28 by the drive device 57 having the above-described configuration, first, as shown in FIGS. 6 to 8, the drive device 57 is engaged with the engagement member 58 positioned above the fitting shaft 66. The rotation restricting member 59 is positioned on both the left and right sides of the shaft 66 and the output shaft 62 faces the rear side, and is arranged on the front side of the rotation operation rod 38.

At this time, the pivot wall 71 is located above the output shaft 62 and extends rearward from the base plate 68 and is opposed in the left-right direction, and the pivot wall 72 is upward from the base side of the engagement member 58. It has an extended shape, the axis of the pivot shaft 73 faces in the left-right direction, and the engagement member 58 can swing up and down around the left-right axis and is biased downward.
Next, when the engaging member 58 is pulled up against the urging force of the spring member 77 (the engaging member 58 is swung upward) and separated from the fitting shaft 66, the output shaft 62 is fitted. The shaft 66 is inserted into the fitting portion 52 from the front side.

At this time, the left and right rotation restricting members 59 are fitted to the front bracket 31 so as to sandwich the left and right side walls 31a, and the rotation restricting member 59 is positioned on the outer side in the opposing direction of the front bracket 31 side wall 31a on the same side in the left and right direction. By doing so (rotation restricting member 59 is engaged with side wall 31a of front bracket 31), rotation of motor body 61 around the output shaft 62 is restricted.
The left and right side walls 31 a of the front bracket 31 serve as a rotation stop portion that restricts rotation around the output shaft 62 of the motor body 61.

The rotation restricting portion (the left and right side walls 31a of the front bracket 31) and the rotation restricting member 59 constitute a rotation restricting means for restricting the rotation of the motor main body 61 around the output shaft 62 axis.
On the other hand, when the engaging member 58 is swung downward after the fitting shaft 66 is inserted into the fitting portion 52, the fitting hole 75 is fitted into the retaining portion 46. As a result, the movement of the driving device 57 in the direction in which the fitting shaft 66 comes out of the fitting portion 52 is restricted (the output shaft 62 is prevented from coming off from the fitting portion 52).

At this time, the engaging member 58 comes into surface contact with the upper surface of the reinforcing portion 45 on the upper side of the holder main body 42 of the front holder 34. Further, the engaging member 58 is urged by the spring member 77 in a direction in surface contact with the upper reinforcing portion 45 of the holder main body 42 of the front holder 34.
In order to remove the driving device 57, the engaging member 58 is pulled up against the urging force of the spring member 77 and separated from the retaining portion 46. In this state, the driving device 57 is moved to the front side and fitted. The combined shaft 66 (output shaft 62) is removed from the fitting portion 52.

  In the configuration described above, the output shaft 62 of the electric motor 56 is fitted into the fitting portion 52 of the rotary operation rod 38 of the left-hand downward device 33L (movable portion operating device) and the engaging member 58 is swung. By simply engaging with the retaining portion 46, it is possible to prevent the output shaft 62 of the electric motor 56 from coming off from the fitting portion 52 and to restrict the rotation of the electric motor 56 around the axis of the output shaft 62. The electric motor 56 can be removed simply by swinging the engaging member 58 to release the engagement with the retaining portion 46 and detaching the output shaft 62 from the fitting portion 52, and the left advancing device 33 </ b> L (movable portion operating device). The electric motor 56 can be easily attached and detached from the above.

The electric motor 56 is supplied with electric power from the tractor 2, and a switch for driving the electric motor 56 is provided in the vicinity of the driver seat of the tractor 2.
As shown in FIG. 13, the swing support frame 9 is disposed along the left-right direction with a pair of left and right support arms 81 that are long in the front-rear direction, an intermediate connecting member 82 that connects the left and right support arms 81 to each other. And a tool bar 83 fixed to the rear end side of the left and right support arms 81.

Each of the left and right support arms 81 is configured to be adjustable in length from a front outer cylindrical body and an inner cylindrical body inserted into the outer cylindrical body from the rear end side, and the intermediate connecting member 82 is connected to the outer cylindrical bodies. Are connected.
A front end side of each support arm 81 is pivotally connected to a rear portion of the connection bracket 20 provided on the support arm 15 of the machine frame 4 via a rotation support shaft 84 so as to be rotatable around a left and right axis. The swing support frame 9 is swingable up and down around the axis of the rotation support shaft 84.

The gauge wheels 7 are attached to the left and right sides of the tool bar 83 so as to be adjustable in height and detachable, and the earthenware 8 is rotatable around the axis in the left and right direction at the center side in the left and right direction. It can be adjusted freely.
The height of the gauge wheel 7 or the earthenware 8 is adjusted by raising and lowering the swing support frame 9 around the rotation support shaft 84.

A height adjusting device 85 that adjusts the height of the tool bar 83 by raising and lowering the swing support frame 9 is provided across the top mast 18 and the intermediate connecting member 82 of the swing support frame 9.
The top mast 18 is configured by connecting a pair of left and right front and rear bifurcated plates 18a opposed to each other in the left and right direction, and a pair of left and right bracket plates 86 are provided on the intermediate connecting member 82 of the swing support frame 9. Is provided.

13 to 17, the height adjusting device 85 is configured to be extendable in the length direction by a saddle holder 87 that is supported on the top mast 18 so as to be rotatable around the axis in the left-right direction, and a screw-type extension structure. A straight extension rod 88 and a cover cylinder 89.
The eaves holder 87 is disposed in the upper rear part between the left and right plates 18a of the top mast 18, and the support shaft 90 supported around the axis in the left and right direction is supported on the plate 18a on the same side in the left and right directions on the left and right sides. Have.

A shaft insertion hole 91 having a shaft core that is orthogonal to the left-right direction and intersects in the vertical direction is formed through the rod holder 87, and a bearing 92 is accommodated on the front end side of the shaft insertion hole 91.
The upper surface of the eaves holder 87 is formed as a flat surface, and a retaining portion 93 is provided on the upper surface of the eaves holder 87.
The retaining portion 93 includes a pair of left and right protrusions 93 a that protrude upward from the upper surface of the heel holder 87.

The telescopic rod 88 is provided across the rod holder 87 and a bracket plate 86 provided at the center in the left-right direction of the intermediate connecting member 82 of the swing support frame 9, and includes a front rod-like rotary operation rod 94 and a rear cylinder. It is comprised from 杆 95.
The front portion of the rotational operation rod 94 in the axial center direction is inserted through the shaft insertion hole 91 and the bearing 92 of the rod holder 87, and the rotation operation rod 94 is supported by the rod holder 87 so as to be rotatable around the axis. .

Further, a male screw portion 96 is formed at the rear portion in the axial direction of the rotary operation rod 94, and the rear side of the rotary operation rod 94 is inserted into the cylindrical rod 95 from the front side in the axial direction.
The front end side of the cylindrical rod 95 is reduced in diameter, and a female screw portion 97 that is screwed into the male screw portion 96 of the rotary operation rod 94 is formed on the inner peripheral surface.
Further, the axially rear end side of the cylindrical rod 95 is pivotally connected to the bracket plate 86 provided on the intermediate connecting member 82 through a pivot shaft 98 so as to be rotatable about the left and right axis.

The cover cylinder 89 is externally fitted to the front side of the telescopic rod 88, and the front end side is fixed to the rod holder 87.
As shown in FIG. 8, the front end side of the rotary operation rod 94 protrudes forward from the rod holder 87, and a fitting member 99 is provided on the protruding portion.
The fitting member 99 is formed in a cylindrical shape, and the rear side of the fitting member 99 is externally fitted to the front end side of the rotation operation rod 94 and is attached to the rotation operation rod 94 via a pin so as to be integrally rotatable. .

The fitting member 99 and the retaining plate 100 provided on the rear side of the rod holder 87 restrict the movement of the rotary operation rod 94 in the axial direction relative to the rod holder 87.
At the front part of the fitting member 99, a fitting part 101 made of an open hexagonal hole is formed on the front side so as to be concentric with the rotary operation rod 94.
The rotation operation rod 94 passes through the retaining plate 100 so as to be rotatable around the axis, and the retaining plate 100 is engaged with the cover cylinder 89 in a non-rotatable manner around the axis of the rotation operation rod 94. Yes.

In the height adjusting device 85 configured as described above, the expansion rod 88 extends and contracts in the length direction by rotating the rotary operation rod 94 about the axis and screwing the male screw portion 96 and the female screw portion 97 together. To do. As a result, the swing support frame 9 swings up and down around the rotation support shaft 84.
The swing support frame 9 is also a movable part that is provided in the rotary tiller 1 and is raised and lowered, and the movable part operating device for raising and lowering the movable part is the height adjusting device 85.

The rotational operation rod 94 of the height adjusting device 85 can also be rotationally driven by the driving device 57 described above (the same driving device 57 as the driving device 57 that raises and lowers the rear cover 28 is used to move the swing support frame 9). Can be raised and lowered).
That is, the fitting shaft 66 of the output shaft 62 of the electric motor 56 is concentric with the fitting portion 101 on the front side of the rotating operation rod 94 of the height adjusting device 85 from the front side in the axial direction of the rotating operation rod 94. By fitting the fitting shaft 66 into the fitting portion 101, the rotational power can be transmitted from the output shaft 62 to the rotary operation rod 94, and the rotation operation rod 94 is rotated around the axis. It can be driven to rotate.

Further, the fitting hole 75 of the engaging member 58 is swung with the engaging member 58 in a state in which the output shaft 62 of the electric motor 56 is fitted to the fitting portion 101, so that the height adjusting device 85 side The retaining part 93 is configured to be detachably fitted.
Further, the left and right rotation restricting members 59 of the drive device 57 sandwich the left and right plates 18 a between the top mast 18 when the output shaft 62 of the electric motor 56 is inserted into the fitting portion 101. The rotation restricting member 59 is positioned on the outer side in the opposite direction of the plate 18a of the top mast 18 on the same side in the left-right direction, so that the rotation of the motor main body 61 around the output shaft 62 is restricted. It is configured as follows.

The left and right plates 18 a of the top mast 18 serve as rotation stoppers that restrict the rotation of the motor body 61 around the output shaft 62.
The rotation restricting portion (the left and right plates 18a of the top mast 18) and the rotation restricting member 59 constitute a rotation restricting means for restricting the rotation of the motor body 61 around the output shaft 62 axis.

Since the mounting / removal operation of the driving device 57 with respect to the height adjusting device 85 is the same as the mounting / removing operation of the driving device 57 with respect to the left-hand descent device 33L described above, description thereof will be omitted.
In the height adjusting device 85, the rotary operation rod at the front of the telescopic rod 88 is constituted by a cylindrical rod having a female screw portion, and the rear portion of the telescopic rod 88 is constituted by a bar having a male screw portion. May be.

  13 to 21, a mounting tool 102 is detachably attached to the center side of the tool bar 83, and the mounting tool 102 has a support bracket 103, and the earthenware fixture 104 rotates on the support bracket 103. An attachment rod 107 provided on the cultivator 8 is attached to an attachment tube 106 provided on the earthenware fixture 104 so as to be adjustable in the vertical position.

As a result, the earthenware 8 can be raised and lowered freely around the rotation support shaft 105, and the rocker 8 can be swung 180 degrees backward from the work position for performing the ground work (such as erection work) shown in FIG. The position can be freely changed to the moved non-working position.
Further, the earthenware container 8 is raised and lowered by the earthenware operation apparatus 108.
This cultivator operating device 108 includes a straight rod-shaped expansion / contraction rod 109 configured to be extendable in the length direction by a screw-type expansion / contraction structure, and an interlocking mechanism 110 that interlocks and connects the expansion / contraction rod 109 and the cultivator mounting tool 104. A cover body 112 attached to a mounting plate 111 provided in the mounting tool 102, a pair of left and right support plates 113 provided at the front of the cover body 112, and pivotally supported by the support plate 113 Bearing holder 114.

The telescopic rod 109 is arranged so that one end side in the axial direction faces the front side, and is formed long in the front-rear direction. The telescopic rod 109 has a front rotation operation rod 115 and a rear screw shaft 116.
The rotary operation rod 115 is mainly composed of a cylindrical (cylindrical) rod body 117 and a screwing member 118 provided on the rear end side of the rod body 117.

The screwing member 118 is formed of a cylindrical body having an internal thread 119 formed on the inner peripheral surface thereof, and is fixed to the rear end of the rod main body 117 so as to be concentric and communicate with the rod main body 117.
The screw shaft 116 includes a shaft main body 121 having a male screw 120 formed on the outer peripheral surface, and a connecting portion 122 provided on the rear end side of the shaft main body 121. The shaft main body 121 of the screw shaft 116 rotates. The operating rod 115 is screwed into the screwing member 118 from the rear side. Further, the shaft main body 121 of the screw shaft 116 can be inserted into the collar main body 117.

The telescopic rod 109 has a length that allows the screw shaft 116 to be screwed and unscrewed by rotating the rotary operation rod 115 around the shaft core and screwing the screw member 118 into the shaft main body 121 of the screw shaft 116. It is configured to expand and contract in the direction (axial direction).
The interlocking mechanism 110 includes a rotation link 125 pivotally attached to the mounting plate 111 of the mounting tool 102 via a pin 123 and pivotally attached to a connecting portion 122 of the screw shaft 116 via a pin 124. A connecting link 127 whose one end is pivotally attached to the rotation link 125 via a pin 126 and one end side is fixed to the rotation support shaft 105 and the other end of the connection link 127 is pivoted via a pin 128 to the other end. The main structure is composed of a wearing rotation arm 129.

The cover body 112 mainly includes a side plate 130 disposed on both the left and right sides of the telescopic rod 109 and the interlocking mechanism 110, and a connecting plate 131 that connects the left and right side plates 130 from the upper edge front end to the rear edge lower end. The cover body 112 is attached to the attachment plate 111 of the mounting tool 102.
The support plate 113 is disposed on both the left and right sides of the front end side of the cover body 112, and the rear portion is attached and fixed to the side plate 130 of the cover body 112. The left and right support plates 113 are bent so that the left-right facing interval at the front is wider than the left-right facing interval at the rear.

The bearing holder 114 is disposed on the front side between the left and right support plates 113, and is supported by the support plate 113 via the support shafts 132 provided on the left and right sides so as to be rotatable about the left and right axis.
The bearing holder 114 has a cylindrical holder body 133 in which a bearing 134 is attached. The bearing body 114 of the rotary operation rod 115 is inserted through the bearing 134, and the rotation operation rod 115 is inserted through the bearing 134. The bearing holder 114 is supported so as to be rotatable around the axis and not movable in the axial direction.

The support shaft 132 is provided on plate members 135 provided on the left and right sides of the holder main body 133.
The front portion of the rod main body 117 of the rotary operation rod 115 protrudes forward from the bearing holder 114, and a fitting member 136 is provided inside the front end side of the rod main body 117. A fitting portion 137 made of a hexagonal hole is formed so as to be concentric with the flange main body 117.

A block-shaped retaining portion 138 is provided on the upper surface of the holder main body 133 of the bearing holder 114.
The retaining portion 138 is an inclined surface that shifts to the rear side as the back surface goes downward, and an inclined surface that shifts to the lower side as the upper surface goes to the front side.
Further, on the front side of the holder main body 133 of the bearing holder 114, a pair of left and right anti-rotation portions 139 located on the left and right sides of the rod main body 117 are provided so as to protrude forward.

The left and right anti-rotation portions 139 are opposed to each other in the left-right direction, and open fitting recesses 140 are formed on the outer sides of the anti-rotation portions 139 in the left-right direction and forward.
In order to raise the soil cultivator 8 from the working position to the non-working position by the soil culturing device operating device 108 having the above-described configuration, first, the rotary operation rod 115 is pivoted from the state where the soil culturing device 8 shown in FIGS. When the screw shaft 116 is screwed forward by rotating around, the upper side of the rotation link 125 is pulled forward.

When the upper side of the pivot link 125 is pulled forward, the pivot arm 129 pivots upwards backward via the connection link 127. As a result, the earthenware fixture 104 rotates about the rotation support shaft 105, and the earthenizer 8 is lifted to the non-working position.
Further, in order to change the earthenware container 8 from the non-working position to the working position, the rotary operation rod 115 is rotated around the axis and the screw shaft 116 is screwed backward.

This cultivator 8 is also a movable part that is provided in the rotary cultivator 1 and is raised and lowered, and a movable part operation device for raising and lowering the movable part is the cultivator operation apparatus 108.
The rotational operation rod 115 of the earthenware operation device 108 can also be rotationally driven by the drive device 57 described above (by the same drive device 57 as the drive device 57 that raises and lowers the rear cover 28 or the swing support frame 9). The cultivator operating device 108 can be raised and lowered).

  That is, the fitting shaft 66 of the output shaft 62 of the electric motor 56 is concentric with the fitting portion 137 on the front side of the rotary operating rod 115 of the earthenware operation device 108 from the front side in the axial direction of the rotating operating rod 115. By fitting the fitting shaft 66 into the fitting portion 137, the rotational power can be transmitted from the output shaft 62 to the rotary operation rod 115, and the rotation operation rod 115 is rotated around the axis. It can be driven to rotate.

In addition, the fitting hole 75 of the engaging member 58 is swung with the engaging member 58 in a state where the output shaft 62 of the electric motor 56 is fitted to the fitting portion 137, so The retaining portion 138 is configured to be detachably fitted.
Further, the left and right rotation restricting members 59 of the drive device 57 are provided with left and right rotation restricting portions provided on the bearing holder 114 when the output shaft 62 of the electric motor 56 is inserted into the fitting portion 137. 139, and the rotation restricting member 59 is inserted and fitted from the front side into the fitting recess 140 of the rotation stopping portion 139 on the same side in the left-right direction, so that the output shaft 62 of the motor main body 61 is fitted. The rotation around the axis is restricted.

The rotation stopper 139 and the rotation restricting member 59 constitute a rotation restricting means for restricting the rotation of the motor body 61 around the output shaft 62 axis.
The mounting / removal operation of the driving device 57 with respect to the earthenware operation device 108 is the same as the above-described mounting / removal operation of the driving device 57 with respect to the left-hand descent devices 33L and 33R, and thus the description thereof is omitted.

The rotary operation rod 115 of the earthenware operation device 108 may be formed of a screw shaft, and the expansion rod 109 may be expanded and contracted by rotating the screw shaft around the axis.
In the rotary cultivator 1 configured as described above, one drive device 57 is connected to a plurality of movable parts (rear cover 28, swing support frame 9, cultivator 8) provided in the rotary cultivator 1. By using the replacement part, the cost can be reduced and the weight can be reduced as compared with the case where the drive unit 57 is provided in each of the movable unit operating devices 33L, 85, and 108 for raising and lowering the movable units 28, 9, and 8. Since there is one switch for driving the electric motor 56, it is possible to prevent an erroneous operation due to the presence of a plurality of switches for driving the electric motor 56.

  Further, the output shaft 62 of the electric motor 56 is fitted into the fitting portions 52, 101, and 137 of the rotary operation rods 38, 94, and 115, and the engaging member 58 is swung to the retaining portions 46, 93, and 138. By merely engaging, it is possible to prevent the output shaft 62 of the electric motor 56 from coming off from the fitting portions 52, 101, 137, and to restrict the rotation of the electric motor 56 around the axis of the output shaft 62. The electric motor 56 can be removed and the drive device 57 (electrically driven) simply by releasing the engagement with respect to the retaining portions 46, 93, 138 by swinging 58 and releasing the output shaft 62 from the fitting portions 52, 101, 137. The motor 56) can be easily attached and detached.

  In addition, since the fitting portions 52, 101, and 137 provided in the respective rotation operation rods 38, 94, and 115 face the front side, the replacement of the driving device 57 can be performed on the same side, and the driving device 57 ( The electric motor 56) can be easily attached and removed (when the electric motor 56 is replaced from one rotary operation rod 38, 94, 115 to another rotary operation rod 38, 94, 115) The motor can be replaced on the front side (the same side) of the rods 38, 94, and 115. For example, the electric motor 56 can be attached and detached without going to the driver's seat side of the tractor 2 or the rear side of the rotary tiller 1. Can be manipulated).

The rotary tiller 1 is provided with a holding member 141 for holding the driving device 57 when the driving device 57 is not used.
By providing the holding member 141, it is possible to prevent the movable parts 28, 9, 8 from being inadvertently moved when the movable parts 28, 9, 8 are not raised or lowered.
As shown in FIGS. 22 to 25, the holding member 141 is provided on the outer surface in the opposing direction of the left plate 18 a of the top mast 18.

The holding member 141 includes a mounting plate 142 fixed to the left plate 18 a by bolts and nuts, and a support base 143 fixed to the left side surface of the mounting plate 142.
The support base 143 includes a support base body 150 having a side wall 150a and front and rear walls 150b and 150c that extend rightward from the front and rear end edges of the side wall 150a and are fixed to the mounting plate 142, and the side wall 150a of the support base body 150. And a mounting member 144 fixed to the upper end side of the.

A regulation piece 145 is formed at the lower part of the side wall 150a of the support base body 150 so as to protrude leftward by cutting and raising the side wall 150a.
The mounting member 144 includes an upper wall 146 and front and rear engaging walls 147 extending downward from the right side of the front and rear edge portions of the upper wall 146.
An output shaft insertion portion 148 that is recessed from the left side to the right side is formed at the center in the front-rear direction of the upper wall 146 of the mounting member 144.

Further, the left and right front and rear of the upper wall 146 of the mounting member 144 are set as a mounting portion 149, the front mounting portion 149 projects forward from the front engaging wall 147, and the rear mounting portion 149 is the rear. It protrudes rearward from the engaging wall 147 on the side.
In order to hold the driving device 57 on the holding member 141, first, the output shaft 62 faces downward, the rotation restricting member 59 is positioned before and after the output shaft 62, and the engaging member 58 is positioned on the left side of the output shaft 62. In this state, the driving device 57 is disposed above the holding member 141.

Next, the engaging member 58 is swung leftward, and the drive device 57 is moved downward so that the output shaft 62 is inserted through the output shaft insertion portion 148.
Then, the heads of the bolts 69 positioned in front of and behind the output shaft 62 come into contact with and are received on the front and rear mounting portions 149, thereby restricting the downward movement of the driving device 57. At the same time, the front rotation restricting member 59 is located on the front side of the front engagement wall 147 and between the front end side of the side wall 150a of the support base body 150 and the front mounting portion 149, and the rear rotation restricting member. 59 is located on the rear side of the rear engagement wall 147 and between the rear end side of the side wall 150a of the support base body 150 and the rear mounting portion 149. Regulation and fall are regulated.

When the engaging member 58 is swung to the right in a state where the driving device 57 is supported by the support base 143, the second fitting hole 76 of the engaging member 58 is fitted into the restriction piece 145 ( The restricting piece 145 is inserted through the second fitting hole 76), thereby restricting the upward movement of the driving device 57.
As described above, the driving device 57 can be held by the holding member 141.
In the holding member 141, the restricting piece 145 may be fitted in the fitting hole 75 of the engaging member 58. However, in this case, the vertical dimension of the holding member 141 is increased. Thus, the holding member is provided by providing the engaging member 58 with the second fitting hole 76 near the base of the fitting hole 75 and fitting the regulating piece 145 into the second fitting hole 76. 141 can be downsized in the vertical direction.

The present invention is not limited to the embodiment and can be changed in design.
For example, in the embodiment described above, a pair of left and right rotation restricting members 59 are provided. However, the rotation restricting member 59 is constituted by a single member, and the rotation restricting member 59 is provided on the left and right rotation-stop portions 18a, 31a, 139. By inserting in between, the rotation of the motor body 61 around the output shaft 62 may be restricted.

In addition, each rotation restricting member 59 is configured to engage the outer side in the opposite direction of the rotation preventing portions 18a, 31a, and 139. However, as illustrated in FIG. You may comprise so that it may engage with the opposing direction outer side of 18a.
In the present embodiment, the rotation of the motor body 61 around the axis of the output shaft 62 is regulated by the fitting operation of the output shaft 62 to the fitting portions 52, 101, and 137. 27, the rotation of the motor main body 61 around the output shaft 62 is regulated by the engagement operation of the engagement member 58 with the retaining portion 138 (by the engagement member 58). May be.

By configuring the engagement member 58 to restrict the rotation of the motor main body 61 around the output shaft 62, the motor main body 61 can be stopped and prevented from coming off at the same time, and the number of members can be reduced. Costs can be reduced.
In the structure shown in FIG. 27, the plate width W of the engagement member 58 is substantially matched with the interval between the left and right plates 18a (left and right rotation stop portions) of the top mast 18, and the engagement member 58 is prevented from being removed. When engaging the portion 138, the engaging member 58 is inserted between the left and right plates 18 a of the top mast 18, so that the rotation of the motor body 61 around the output shaft 62 is restricted.

Therefore, in this case, the engaging member 58 also serves as the rotation restricting member 59 (in other words, the engaging member and the rotation restricting member are one member (including a plurality of members joined by welding or the like). Further, the engagement member 58 and the rotation stopper 18a constitute a rotation restricting means for restricting the rotation of the motor main body 61 around the output shaft 62 axis.
In FIG. 27, an example in which the engaging member and the rotation restricting member are configured as one member is illustrated as an example adopted in the height adjusting device 85. 33L, cultivator operating device 108) may also be adopted.

Further, the engagement member 58 may have a function as a rotation restricting member, and the provision of the rotation restricting member 59 which is a separate member from the engaging member 58 may be used in combination.
Further, in the rotary cultivator 1 having the above-described configuration, it is sufficient that one or two or more movable parts are equipped. In this embodiment, all the movable parts are raised and lowered by one electric motor 56. Although disclosed, even when three or more movable parts are provided, in order to raise and lower at least two movable parts, the movable part can be raised and lowered by changing one electric motor 56. That's fine.

In addition, when three or more movable parts are provided and the two movable parts can be raised and lowered by changing one electric motor 56, the other movable parts may be manually or other electric motors. It is configured to be raised and lowered by.
Further, in the rotary cultivator 1, when the rotary cultivator 1 is raised and brought close to the tractor 2 side in order to facilitate replacement of the drive device 57 (electric motor 56), the tractor 2 The drive device 57 can be replaced from the side.

8 ridger (movable part)
9 Swing support frame (movable part)
18a Plate (rotation stop)
31a Side wall (rotation stop)
28 Rear cover (movable part)
33L Lowering device (moving part operation device)
38 Rotating operation rod 46 Retaining part 52 Fitting part 56 Electric motor 59 Rotation restricting part 61 Motor body 62 Output shaft 85 Height adjusting device (movable part operating device)
93 Stopping part 94 Rotating operation rod 101 Fitting part 108 Soil cultivator operating device (movable part operating device)
115 Rotating operation rod 137 Fitting portion 138 Detent portion 139 Detent portion

Claims (4)

The movable part is provided with a movable part that is raised and lowered, and a movable part operating device for raising and lowering the movable part. The movable part operating apparatus is provided with a rotary operation rod that is rotated around an axis to raise and lower the movable part. The rotary tiller is provided with a fitting portion on one end side in the axial direction of the rotating operation rod so that the output shaft of the electric motor is removably fitted to rotate the rotating operation rod by the power of the electric motor. In the machine
It is pivotally supported on the electric motor side and swings in a state where the output shaft is fitted in the fitting portion, so that the retaining portion provided on the movable portion operating device side can be freely engaged and disengaged. And an engagement member that prevents the output shaft from coming off from the fitting portion,
In addition, the output of the main body portion of the electric motor by the fitting operation of the output shaft to the fitting portion or the engaging operation of the engaging member to the retaining portion between the electric motor side and the movable portion operating device side. A rotary cultivator comprising a rotation restricting means for restricting rotation around the shaft axis.   The output shaft of the electric motor is configured to be fitted to and detached from the fitting portion in the axial direction of the output shaft, and the engaging member is arranged around an axis parallel to a direction orthogonal to the axis of the output shaft. The rotary tiller according to claim 1, wherein the rotary tiller is swingable, and the engaging member is formed with a fitting hole that fits in and out of the retaining portion. The rotation restricting means is composed of a rotation restricting member provided along the axial direction of the output shaft on the electric motor side, and a rotation stopping portion provided on the movable part operating device side,
When the output shaft is fitted to the fitting portion in the axial direction, the rotation restricting member is engaged with the rotation preventing portion to restrict the rotation of the body portion of the electric motor around the output shaft axis. The rotary tiller according to claim 1 or 2, wherein The rotation restricting means is composed of the engagement member and a rotation stopping portion provided on the movable part operating device side,
When the engagement member is engaged with the retaining portion, the engagement member is engaged with the rotation preventing portion to restrict the rotation of the body portion of the electric motor around the output shaft axis. The rotary cultivator according to claim 1 or 2.