JP2020145989A - Implement - Google Patents

Abstract

To provide an implement in which a work device is supported to a machine body so as to perform rolling around a shaft core in a cross direction, in which a drive shaft of the rolling mechanism can be stably driven to rotate by an electric motor.SOLUTION: A rolling mechanism 31 comprises: a drive shaft 38 for rotatably supporting a rotor 39 in an integrated manner; a first shaft support part 41 for rotatably supporting one side part on the drive shaft 38 with respect to the rotor 39; a second shaft support part 42 for rotatably supporting the other side part on the drive shaft 38 with respect to the rotor 39; an electric motor for driving the drive shaft 38 to rotate in one side and the other side; and right and left linkage members 47, 48 extending from the rotor 39 to a right/left side, and connected to a right/left part on the work device with respect to the rotor 39.SELECTED DRAWING: Figure 7

Description

The present invention relates to a configuration of a rolling operation of a work device in a work machine in which the work device is supported by the machine body so as to be rollable around an axis in the front-rear direction.

In a passenger-type rice planting machine, which is an example of a working machine, as disclosed in Patent Document 1, in a rolling mechanism for rolling operation of a working device, a drive shaft that integrally rotatably supports a rotating body and a drive shaft are provided. An electric motor that is rotationally driven to one side and the other side, and right and left wires that extend from the rotating body to the right and left sides and are connected to the working device are provided.
The drive shaft is rotationally driven to one side and the other side by the electric motor, and the right and left wires are pulled by the rotating body and pushed out from the rotating body, so that the working device is rolled.

Japanese Unexamined Patent Publication No. 2014-68573

In Patent Document 1, since the drive shaft that integrally and rotatably supports the rotating body is cantilevered by a single shaft support portion, the drive shaft is stably rotationally driven by the electric motor. There is room for improvement in terms of making it.

An object of the present invention is to configure a working machine in which a working device is supported by the machine body so as to be able to roll around an axis in the front-rear direction so that the drive shaft is stably rotationally driven by an electric motor.

The work machine of the present invention rolls the work device, a work device supported by the machine body so as to be able to roll around an axis in the front-rear direction, a tilt sensor for detecting the tilt angle of the work device in the left-right direction, and the work device. A rolling mechanism is provided, and the rolling mechanism includes a drive shaft that integrally and rotatably supports a rotating body, and a first shaft that rotatably supports a portion of the drive shaft on one side of the rotating body. A support portion, a second shaft support portion that rotatably supports a portion of the drive shaft on the other side of the rotating body, an electric motor that rotationally drives the drive shaft to one side and the other side, and the rotation. Right and left linking members extending from the body to the right and left sides and connected to the right and left portions with respect to the rotating body in the working device are provided based on the detection value of the tilt sensor. The electric motor is operated, the drive shaft is rotationally driven to one side and the other side, and the right and left linking members are pulled by the rotating body and pushed out from the rotating body, thereby tilting the tilting member. A rolling control unit for rolling the working device is provided so that the detected value of the sensor becomes the set tilt angle.

According to the present invention, the rolling mechanism includes a drive shaft that integrally rotatably supports a rotating body, a first shaft support portion that rotatably supports a portion of the drive shaft on one side of the rotating body, and a drive shaft. A second shaft support portion that rotatably supports the other side portion with respect to the rotating body, an electric motor that rotationally drives the drive shaft to one side and the other side, and extending from the rotating body to the right and left sides. Right and left linking members connected to right and left portions with respect to the rotating body in the working device are provided.

A rolling control unit that operates the electric motor is provided based on the detection value of the tilt sensor that detects the tilt angle of the work device in the left-right direction, and the drive shaft is rotationally driven to one side and the other side by the electric motor. , The right and left linking members are pulled by and pushed out of the rotating body, and the working device is rolled so that the detection value of the tilt sensor becomes the set tilt angle.

According to the present invention, the drive shaft is stably supported in a double-sided manner by the first shaft support portion and the second shaft support portion that rotatably support one side and the other side of the rotating body in the drive shaft. Has been done. As a result, the drive shaft is stably rotationally driven by the electric motor, and the stability of the operation of the rolling mechanism is improved.

In the present invention, it is preferable that the first shaft support portion and the second shaft support portion are made of resin.

According to the present invention, since the first shaft support portion and the second shaft support portion are made of resin, the first shaft support portion and the second shaft support portion are configured to be lighter than the metal bearing. This makes it possible to reduce the weight and cost of the rolling mechanism.

In the present invention, the rolling control unit is provided with a stop operation unit rotatably provided integrally with the rotating body and a stop sensor provided on a first support member that supports the first shaft support portion. It is preferable to stop the electric motor when the rotating body is rotationally driven to one side and the other side and the stop operation unit comes into contact with the contact portion of the stop sensor.

According to the present invention, a stop operation unit and a stop sensor are provided as a configuration for stopping the electric motor at the right and left rolling limits.
When the drive shaft is rotationally driven to one side by the electric motor and the rotating body reaches one of the right and left rolling limits, the stop operation unit comes into contact with the contact portion of the stop sensor, and the electric motor stops. When the drive shaft is rotationally driven to the other side by the electric motor and the rotating body reaches the rolling limit of the other right and left, the stop operation unit contacts the contact portion of the stop sensor, and the electric motor stops.

According to the present invention, since the stop sensor is provided on the first support member that supports the first shaft support portion, the first support member is also used as the support member of the first shaft support portion and the support member of the stop sensor. Therefore, the structure of the rolling mechanism can be simplified and the weight can be reduced.

In the present invention, the stop sensor is located between the first support member and the second support member that supports the second shaft support portion when viewed from a direction orthogonal to the rotation axis core of the rotating body. As described above, it is preferable that the first support member is provided.

According to the present invention, the stop sensor is arranged in the space between the first support member that supports the first shaft support portion and the second support member that supports the second shaft support portion, and the stop sensor Is protected by the first support member and the second support member, so that the durability of the stop sensor is improved.

In the present invention, it is preferable that the electric motor is provided on the second support member.

According to the present invention, since the electric motor is provided on the second support member that supports the second shaft support portion, the second support member is also used as the support member of the second shaft support portion and the support member of the electric motor. Therefore, the structure of the rolling mechanism can be simplified and the weight can be reduced.

According to the present invention, the stop sensor, the first support member, the electric motor, and the second support member are arranged on one side and the other side of the rotating body on the drive shaft so as to be separated from each other.
As a result, the stop sensor and the electric motor are less likely to affect each other and are arranged reasonably.
It is less affected by the electric motor and the maintenance work of the stop sensor becomes easier, and it is less affected by the stop sensor and the maintenance work of the electric motor becomes easier.

In the present invention, the drive shaft penetrates the second shaft support portion and projects to the opposite side of the rotating body, and the drive gear moves from the second shaft support portion on the drive shaft to the opposite side of the rotating body. It is preferable that the electric motor is connected to the protruding portion to rotationally drive the drive gear to rotationally drive the drive shaft.

When the drive shaft is rotationally driven by an electric motor, according to the present invention, the drive gear connected to the drive shaft may be directly driven by the electric motor to rotationally drive the drive shaft. Therefore, the structure of the rolling mechanism can be simplified and the weight can be reduced.

According to the present invention, a drive gear is connected to a portion of the drive shaft that protrudes from the second shaft support portion to the opposite side of the rotating body, and the rotating body and the drive gear sandwich the second shaft support portion between them. The right and left linking members and the drive gears extending to the right and left sides from the rotating body are arranged apart from each other.
As a result, it is possible to suppress the possibility of interference between the drive gear that is driven to rotate and the right and left linking members that are pulled by the rotating body and pushed out from the rotating body.

In the present invention, the rotating body is provided with a contact portion rotatably provided integrally with the rotating body and a stopper portion provided on the first support member or the second support member, and the rotating body is provided on one side and on one side. Even if the stop operation unit is rotationally driven to the other side and the stop operation unit contacts the contact portion of the stop sensor, when the rotating body rotates to one side and the other side, the contact portion hits the stopper portion and the rotating body Is preferably stopped.

Even if the stop sensor detects that the rotating body has reached the right and left rolling limits, the rotating body exceeds the right and left rolling limits and moves to one side and the other side due to a delay in the stop operation of the electric motor. It may rotate.

According to the present invention, even if the rotating body rotates to one side and the other side beyond the right and left rolling limits, the rotating body is forcibly forced to hit the stopper portion by the contact portion provided on the rotating body. It can be stopped. This makes it possible to prevent damage caused by the rotating body rotating to one side and the other side beyond the right and left rolling limits.

According to the present invention, the stopper portion is provided on the first support member or the second support member.
When the stopper portion is provided on the first support member, the first support member is also used as the support member of the first shaft support portion, the support member of the stop sensor, and the support member of the stopper portion. The structure can be simplified and the weight can be reduced.
When the stopper portion is provided on the second support member, the second support member is also used as the support member of the second shaft support portion and the support member of the stopper portion, thereby simplifying the structure of the rolling mechanism and reducing the weight. Can be achieved.

In the present invention, the stop operation portion is provided on the portion of the rotating body on the side of the first shaft support portion, and the contact portion is provided on the portion of the rotating body on the side of the second shaft support portion. It is preferable that the stopper portion is provided on the second support member.

According to the present invention, the stop operation portion, the contact portion, and the stopper portion are arranged apart from each other along the drive shaft. As a result, the stop operation portion and the contact portion are less likely to affect each other and are provided on the rotating body reasonably, and the stop operation portion and the stopper portion are less likely to affect each other and are arranged reasonably. Will be done.

It is a left side view of a passenger-type rice transplanter. It is a left side view near the seedling planting device and the ground leveling device. It is a front view of the vicinity of a rolling mechanism. It is an exploded perspective view near the rolling mechanism. It is an exploded perspective view of the vicinity of a substrate of a rolling mechanism and a support bracket. It is a front view of a rolling mechanism. It is a vertical sectional left side view of a rolling mechanism. It is a front view of the inside of a rolling mechanism. It is a front view of the inside of the rolling mechanism which shows the state which the drive shaft and the rotating body reached the left rolling limit from the state shown in FIG. It is a front view of the inside of the rolling mechanism which shows the state which the drive shaft and the rotating body reached the right rolling limit from the state shown in FIG. It is a schematic diagram which shows the linkage state of a control device and each part.

1 to 11 show a passenger-type rice transplanter which is an example of a working machine. In FIGS. 1 to 11, F indicates a forward direction, B indicates a backward direction, and U indicates an upward direction. D indicates a downward direction, R indicates a right direction, and L indicates a left direction.

(Overall configuration of passenger rice transplanter)
As shown in FIGS. 1, 2 and 3, in a passenger-type rice transplanter, a link mechanism 4 is vertically swingably supported at the rear portion of a machine body 3 provided with front wheels 1 and rear wheels 2 and extends to the rear side. A hydraulic cylinder 5 is provided to move the link mechanism 4 up and down.

The seedling planting device 6 (corresponding to a working device) is supported by a vertical link 4a at the rear of the link mechanism 4, and the seedling planting device 6 is supported by the machine body 3 via the link mechanism 4. The hydraulic cylinder 5 swings the link mechanism 4 up and down to move the seedling planting device 6 up and down.

A ground leveling device 23 (corresponding to a work device) for leveling the rice field surface G is supported at the lower part on the front side of the seedling planting device 6, and the ground leveling device 23 is viewed from the side with the seedling planting device 6 and the rear wheel 2. It is placed between. A fertilizer application device 7 for supplying fertilizer to the rice field G is provided over the rear part of the machine body 3 and the seedling planting device 6.

(Overall configuration of seedling planting device)
As shown in FIGS. 1, 2 and 3, the seedling planting device 6 includes a support frame 8, a feed case 14, a planting transmission case 9, a rotating case 10, a planting arm 11, a float 12, a seedling stand 13, and the like. It is provided.

The support frame 8 is arranged along the left-right direction, the feed case 14 is connected to the left-right center portion of the support frame 8, and the two planting transmission cases 9 are connected to the right portion and the left portion of the support frame 8. It is extended to the rear side.

The rotary case 10 is rotatably supported on the right and left portions of the rear portion of the planting transmission case 9, and the planting arms 11 are supported on both ends of the rotary case 10. The seedling stand 13 is supported so as to be reciprocally movable in the left-right direction.

The feed case 14 is rotatably supported around the axial core P1 in the front-rear direction below the vertical link 4a at the rear of the link mechanism 4, and the seedling planting device 6 is placed around the axial core P1 via the link mechanism 4. It is supported by the aircraft 3 so that it can be rolled.

The power of the engine (not shown) of the airframe 3 is transmitted from the planting clutch (not shown) to the internal transmission mechanism (not shown) of the feed case 14 via the transmission shaft 35, and the feed case 14 The seedling pedestal 13 is laterally driven in the left-right direction with a predetermined stroke by a lateral feed shaft (not shown) provided in.

The power transmitted to the transmission mechanism of the feed case 14 is transmitted to the rotating case 10. As the seedling stand 13 is laterally driven in the left-right direction, the rotary case 10 is rotationally driven, and the planting arm 11 alternately takes out seedlings from the lower part of the seedling stand 13 and plants them on the rice field G. ..

(Overall configuration of fertilizer application device)
As shown in FIGS. 1 and 2, the fertilizer application device 7 is provided with a hopper 15, a feeding portion 16, a blower 17, a groove making device 18, a hose 19, and the like.

A hopper 15 for storing fertilizer and a feeding portion 16 are supported on the rear portion of the driver's seat 20 in the machine body 3, and a blower 17 is provided on the left lateral outer portion of the feeding portion 16. A grooving device 18 is attached to the float 12, four grooving devices 18 are provided, and four hoses 19 are connected to the feeding portion 16 and the grooving device 18.

The power of the engine (not shown) of the machine body 3 is transmitted to the feeding section 16 via the fertilizer application clutch (not shown), the fertilizer of the hopper 15 is fed by the feeding section 16, and the hose is fed by the transport wind of the blower 17. It is supplied to the groove making device 18 through 19. Fertilizer is supplied from the groove making device 18 to the groove of the field surface G while the groove is formed on the rice field surface G by the groove making device 18.

(Overall configuration of ground leveling equipment)
As shown in FIGS. 1 and 2, a ground leveling device 23 for leveling the rice field surface G is supported at the lower part of the front portion of the seedling planting device 6 so as to be located on the front side with respect to the support frame 8.

As described in the above (overall configuration of the seedling planting device), the seedling planting device 6 and the ground leveling device 23 are supported by the machine body 3 so as to be rollable around the axis P1. , It is integrally supported by the machine body 3 so that it can be rolled around the shaft core P1.

The right and left support cases 27 supported by the right and left portions of the support frame 8 extend obliquely downward from the support frame 8 on the front side. A drive shaft 28 is rotatably supported in the left-right direction over the front portions of the right and left support cases 27, and a large number of ground leveling bodies 29 are integrally rotatably attached to the drive shaft 28. The cover 30 is arranged in the left-right direction on the rear side of the drive shaft 28 and the ground leveling body 29.

The power transmitted to the seedling planting device 6 is branched and transmitted to the drive shaft 28 via a transmission chain (not shown) inside the support case 27, and the drive shaft 28 and the ground leveling body 29 are shown in FIG. The surface G is leveled by the ground leveling body 29, which is rotationally driven in the counterclockwise direction. The cover 30 stops the scattering of muddy water from the ground leveling body 29 to the seedling planting device 6.

(Support structure for seedling stand of seedling planting device)
As shown in FIGS. 2, 3 and 4, the support rail 21 is supported along the left-right direction on the upper part of the planting transmission case 9. The lower part of the seedling stand 13 is supported by the support rail 21 so as to be movable along the left-right direction, and the seedling stand 13 extends diagonally from the planting transmission case 9 to the upper side on the front side in a side view. There is.

The support frame 22 is connected to the right and left portions of the support frame 8 and extends upward, and the support frame 24 is connected to the upper part of the support frame 22. A support rail 25 is connected to the upper part of the seedling rest 13 along the left-right direction, and a roller 26 supported by the upper part of the support frame 22 is inserted into the support rail 25.

As a result, the lower part of the seedling stand 13 is supported by the planting transmission case 9 and the support rail 21 so as to be movable in the left-right direction, and the upper part (support rail 25) of the seedling stand 13 is supported by the support frame 22 and the roller 26. It is supported so as to be movable in the left-right direction, and the seedling stand 13 is laterally fed and driven in the left-right direction with a predetermined stroke.

(Overall configuration of the rolling mechanism that rolls the seedling planting device)
As shown in FIGS. 1, 2 and 3, the rolling mechanism 31 is connected to the upper part of the vertical link 4a of the link mechanism 4.

As shown in FIGS. 3 to 7, the rolling mechanism 31 has a substrate 32, a support bracket 37 (corresponding to the first support member), a drive shaft 38, a rotating body 39, a first shaft support portion 41, and a second shaft support portion. 42, electric motor 45, gear mechanism 46, right wire 47 (corresponding to the linking member), left wire 48 (corresponding to the linking member), stop sensor 50, stop operation part 51, elastic body 52, contact part 54, stopper A portion 55, a cover 56, and the like are provided.

(Structure of board and support bracket in rolling mechanism)
As shown in FIGS. 2 to 7, the substrate 32 is formed by bending a metal plate material, and has a connecting portion 33 which is a lower member bent in a channel shape and a support portion which is an upper member. 34 (corresponding to the second support member) is provided, and the lower part of the connecting portion 33 is connected to the upper part of the vertical link 4a of the link mechanism 4.

The hose support portion 36 is connected to the connecting portion 33 of the substrate 32, and the hose 19 is passed through the hose support portion 36 and supported. A reinforcing overhanging portion 33a formed so as to protrude to the front side by press working is provided on the connecting portion 33 of the substrate 32 along the vertical direction, and extends to the supporting portion 34 of the substrate 32.
Two openings 34a and 34b are opened in the support portion 34 of the substrate 32 so as to be arranged in the vertical direction, and a mounting portion 34c is provided on the outer peripheral portion of the support portion 34 of the substrate 32.

As shown in FIGS. 4 to 7, the support bracket 37 is formed by bending a metal plate material in an angle shape in a side view, and the support bracket 37 is on the front side with respect to the support portion 34 of the substrate 32. It is connected to the support portion 34 of the substrate 32 so as to be arranged at intervals.

An opening 37a is opened in the upper part of the support bracket 37, and an opening 37b is opened in the lower part of the support bracket 37. A part of the lower part of the support bracket 37 is extended and bent, and a receiving portion 37c is provided on the support bracket 37. A part of the lower part of the support bracket 37 is extended, and a connecting portion 37d is provided on the support bracket 37.

A cover 56 made of synthetic resin is provided, and the cover 56 is fitted into the attachment portion 34c of the support portion 34 of the substrate 32 and attached to the support portion 34 of the substrate 32. The cover 56 provides a support bracket 37, a drive shaft 38, a rotating body 39, a first shaft support portion 41, a second shaft support portion 42, a stop sensor 50, a stop operation portion 51, an elastic body 52, a contact portion 54, and a stopper, which will be described later. Part 55 and the like are covered.

(Structure related to support and rotational drive of drive shaft and rotating body in rolling mechanism)
As shown in FIGS. 6 and 7, the first axis support portion 41 is attached to the opening 37a of the support bracket 37 in the front-rear direction, and the second axis support is provided to the opening 34a of the support portion 34 of the substrate 32. The portion 42 is attached in the front-rear direction. The first shaft support portion 41 and the second shaft support portion 42 are provided with through holes extending in the front-rear direction and have the same shape, and are integrally formed of synthetic resin.

The drive shaft 38 is rotatably supported by the first shaft support portion 41 and the second shaft support portion 42, and is located between the first shaft support portion 41 and the second shaft support portion 42 on the drive shaft 38. , The rotating body 39 is rotatably supported integrally with the drive shaft 38.

As a result, the portion of the drive shaft 38 on one side (front side) with respect to the rotating body 39 is rotatably supported by the first shaft support portion 41, and the other side (rear side) with respect to the rotating body 39 on the drive shaft 38. ) Is rotatably supported by the second shaft support portion 42. The drive shaft 38 and the rotating body 39 are integrally rotatably supported around the rotating shaft core P2 in the front-rear direction of the first shaft support portion 41 and the second shaft support portion 42.

The drive shaft 38 penetrates the second shaft support portion 42 and projects to the opposite side (rear side) of the rotating body 39, and the drive gear 40 is opposed to the rotating body 39 from the second shaft support portion 42 on the drive shaft 38. It is connected to the part that protrudes to the side (rear side).

The drive shaft 38 penetrates the first shaft support portion 41 and projects to the opposite side (front side) of the rotating body 39, and protrudes from the first shaft support portion 41 of the drive shaft 38 to the opposite side (front side) of the rotating body 39. A washer 43 is connected to the portion by a bolt 44. The position of the drive shaft 38 in the front-rear direction is determined by the drive gear 40 and the washer 43.

The electric motor 45 and the gear mechanism 46 are provided and connected to the support portion 34 of the substrate 32, and the pinion gear 46a of the gear mechanism 46 enters the opening 34b of the support portion 34 of the substrate 32 while being connected to the drive gear 40. I'm biting. The electric motor 45 rotationally drives the pinion gear 46a of the gear mechanism 46 to one side and the other side, the drive gear 40 is rotationally driven to one side A1 and the other side A2, and the drive shaft 38 and the rotating body 39 are one side. It is rotationally driven to the side A1 and the other side A2.

(Structure of rotating body, right and left wires in rolling mechanism)
As shown in FIGS. 3, 6 and 7, the rotating body 39 has a pulley shape in which two groove portions 39a and 39b are formed on the outer peripheral portion, and is integrally formed of synthetic resin.

The right wire 47 is wound around the groove 39a of the rotating body 39 and extends from the upper side to the right side of the rotating body 39. In the seedling stand 13, the bracket 25a is connected to the right side of the support rail 25. The right spring 49 is connected to the right wire 47 and the right bracket 25a of the support rail 25, and the right wire 47 is on the right side of the rotating body 39 in the seedling planting device 6. It is connected.

The left wire 48 is wound around the groove 39b of the rotating body 39 and extends from the upper side to the left side of the rotating body 39. In the seedling rest 13, the bracket 25a is connected to the left side of the support rail 25. The left spring 49 is connected to the left wire 48 and the left bracket 25a of the support rail 25, and the left wire 48 is on the left side of the rotating body 39 in the seedling planting device 6. It is connected.

As shown in FIGS. 2, 3 and 4, the right and left brackets 25a of the support rail 25 are laterally connected to the support rail 25 so as to project diagonally downward to the front side from the support rail 25. The connecting portions 49a at the ends of the right and left springs 49 are bent to the rear side (the seedling stand 13 side) in a crank shape in a plan view and are connected to the right and left brackets 25a of the support rail 25. ..

In a state where the seedling planting device 6 is parallel to the machine body 3 in the left-right direction, virtual lines (not shown) extending from the right and left wires 47 and 48 to the right and left are the centers of the right and left springs 49. It reaches the connection portion 49a of the right and left springs 49 and the right and left brackets 25a of the support rail 25 when viewed from the front.

The right and left springs 49 are separated forward from the seedling stand 13 and the support rail 25 by the connecting portion 49a of the right and left springs 49, and the right and left springs 49 are attached to the seedling stand 13 and the support rail 25. Difficult to contact.

(Configuration related to stop sensor in rolling mechanism)
As shown in FIGS. 6, 7 and 8, a single stop sensor 50 of the limit switch type is provided and connected to the rear side (support portion 34 side of the substrate 32) of the connection portion 37d of the support bracket 37. ing.

As a result, the stop sensor 50 is located between the support bracket 37 and the support portion 34 of the substrate 32 when viewed from the direction (horizontal direction) orthogonal to the rotation axis P2 of the rotating body 39, and the rotating body It is located below 39.

The contact portion 50a of the stop sensor 50 extends from the stop sensor 50 toward the upper rotating body 39. A harness 53 that transmits a detection signal of the stop sensor 50 extends downward from the lower part of the stop sensor 50 and is arranged below the support bracket 37.

(Structure of elastic body in rolling mechanism)
As shown in FIGS. 6, 7 and 8, the elastic body 52 made of a metal leaf spring is viewed from the direction (front-back direction) of the rotating shaft core P2 of the rotating body 39, and the rotating body 39 and the stop sensor 50. It is arranged along the rotation direction (left-right direction) of the rotating body 39 with the contact portion 50a of.

The base portion 52a of the elastic body 52 is connected to the rear side (support portion 34 side of the substrate 32) of the stop sensor 50, and the detent portion 52b extending from the base portion 52a of the elastic body 52 is the support bracket 37. It is inserted into the opening 37b of.

The width W2 of the elastic body 52 is substantially the same as the width W1 of the stop operation unit 51 described later (configuration relating to the stop operation unit, the contact portion, and the stopper portion in the rolling mechanism), or from the width W1 of the stop operation unit 51. Is also a little big. The width W2 of the elastic body 52 is larger than the width of the contact portion 50a of the stop sensor 50.

The elastic body 52 extends upward and to the right from the base portion 52a of the elastic body 52, and is arranged between the rotating body 39 and the contact portion 50a of the stop sensor 50. The elastic body 52 is formed in an arc shape that protrudes toward the rotating body 39 (upper side) with respect to the contact portion 50a of the stop sensor 50 when viewed from the direction (front-back direction) of the rotating shaft core P2 of the rotating body 39. ..

In the portion of the elastic body 52 between the rotating body 39 and the contact portion 50a of the stop sensor 50, the left side (elastic body) with respect to the central portion 52f of the elastic body 52 facing the contact portion 50a of the stop sensor 50 in front view. Attention is paid to the portion 52d on the base portion 52a side of the 52) and the portion 52e on the right side (the engaging portion 52c side of the elastic body 52) with respect to the central portion 52f of the elastic body 52.

The curvature of the portion 52d of the elastic body 52 is slightly smaller than the curvature of the portion 52e of the elastic body 52, and the radius of curvature of the portion 52d of the elastic body 52 is slightly smaller than the radius of curvature of the portion 52e of the elastic body 52. It is large, and the bending degree of the elastic body 52 portion 52d is slightly gentler than the bending condition of the elastic body 52 portion 52e.

As a result, one side of the elastic body 52 along the rotation direction of the rotating body 39 (base 52a of the elastic body 52) is supported by the support bracket 37, and the rotating body 39 in the elastic body 52 rotates in the rotation direction (left-right direction). The elastic body 52 is cantilevered so that the other side portion along the) is in a free state. A portion of the elastic body 52 between the rotating body 39 and the contact portion 50a of the stop sensor 50 and the harness 53 are arranged on opposite sides in the vertical direction with the stop sensor 50 sandwiched between them.

The other side portion of the elastic body 52 along the rotation direction (left-right direction) of the rotating body 39 is bent in a channel shape in a front view to form an engaging portion 52c, and the engaging portion 52c is a support bracket. It is engaged with the receiving portion 37c of 37.

The elastic body 52 tries to approach the rotating body 39 side (upper side) by its own urging force, whereas the engaging portion 52c of the elastic body 52 is engaged with the receiving portion 37c of the support bracket 37. The elastic body 52 is stopped at a predetermined position shown in FIGS. 6 and 8.

Even if the elastic body 52 attempts to be displaced along the rotation direction (left-right direction) of the rotating body 39, the elastic body 52 is engaged with the receiving portion 37c of the support bracket 37 because the engaging portion 52c of the elastic body 52 is engaged with the receiving portion 37c of the support bracket 37. The displacement of the rotating body 39 along the rotation direction (left-right direction) is stopped.

When the elastic body 52 tries to move downward from the predetermined positions shown in FIGS. 6 and 8 with respect to the rotating body 39, the engaging portion 52c of the elastic body 52 separates downward from the receiving portion 37c of the support bracket 37. Therefore, a displacement of the elastic body 52 away from a predetermined position with respect to the rotating body 39 is allowed.

(Structure related to stop operation part, contact part and stopper part in rolling mechanism)
As shown in FIGS. 6, 7 and 8, the stop operation unit 51 made of synthetic resin is one side of the outer peripheral portion of the rotating body 39 in the direction (front-back direction) of the rotating shaft core P2 of the rotating body 39 in a side view. It is provided in the (front side) portion, is provided in the front portion with respect to the groove portion 39b of the rotating body 39, is provided in the portion on the first shaft support portion 41 side of the rotating body 39, and is integrated with the rotating body 39. It is rotatably provided.

The stop operation unit 51 has a predetermined length L1 along the rotation direction (left-right direction) of the rotating body 39 in the front view, and has a predetermined width W1 in the side view. The end 51a on one side of the rotating body 39 in the stop operation unit 51 in the rotation direction (left-right direction) and the other end 51b in the rotation direction (left-right direction) of the rotating body 39 in the stop operation unit 51 are front surfaces. It is formed in an arc shape visually.

A contact portion 54 made of synthetic resin is provided on the outer peripheral portion of the rotating body 39 on the other side (rear side) of the rotating body 39 in the direction (front-back direction) of the rotating shaft core P2 in a side view. It is provided in a portion on the rear side with respect to the groove portion 39a of 39, is provided in a portion on the side of the second shaft support portion 42 in the rotating body 39, and is provided rotatably integrally with the rotating body 39.

The contact portion 54 has a predetermined length L2 along the rotation direction (left-right direction) of the rotating body 39 in front view, and the predetermined length L2 of the contact portion 54 is a predetermined length of the stop operation unit 51. Smaller (narrower) than L1. The contact portion 54 is provided on the rotating body 39 so as to be located at the left and right central portions of the stop operation portion 51 in front view.

The stopper portion 55 is provided and connected to the support portion 34 of the substrate 32 so as to be located below the second shaft support portion 42 in a side view.

As described above (configuration relating to support and rotational drive of the drive shaft and the rotating body in the rolling mechanism), the electric motor 45 and the gear mechanism 46 are provided and connected to the support portion 34 of the substrate 32. , The electric motor 45, the gear mechanism 46, and the drive gear 40 are arranged on the other side (rear side) of the rotating body 39 in the direction (front-rear direction) of the rotating shaft core P2 on the outer peripheral portion of the rotating body 39 in a side view. ing.

(Structure related to rolling control unit)
As shown in FIG. 11, an inclination sensor 57 for detecting the inclination angle of the seedling planting device 6 in the horizontal direction with respect to the horizontal plane is attached to the feed case 14, and the detection value of the inclination sensor 57 is provided on the machine body 3. It is input to the control device 60. The detection signal of the stop sensor 50 is input from the harness 53 to the control device 60.

A dial operation type setting switch 58 is provided on the machine body 3, and an operation signal of the setting switch 58 is input to the control device 60. The setting switch 58 sets the set tilt angle, and the set tilt angle can be arbitrarily set from the horizontal position and the horizontal position to the right-down position and the left-down position.

As shown in FIGS. 3, 6 and 7, when the drive shaft 38 and the rotating body 39 are rotationally driven to one side A1 by the electric motor 45, the right wire 47 is wound around the rotating body 39 and the rotating body 39. The left wire 48 is drawn out from the rotating body 39 and pushed out from the rotating body 39. As a result, the seedling planting device 6 (ground leveling device 23) is rolled so that the right portion of the seedling planting device 6 rises and the left portion of the seedling planting device 6 descends.

When the drive shaft 38 and the rotating body 39 are rotationally driven to the other side A2 by the electric motor 45, the left wire 48 is wound around the rotating body 39 and pulled by the rotating body 39, and the right wire 47 is the rotating body. It is fed out from 39 and pushed out from the rotating body 39. As a result, the seedling planting device 6 is rolled so that the left portion of the seedling planting device 6 is raised and the right portion of the seedling planting device 6 is lowered.

As shown in FIG. 11, a rolling control unit 61 is provided in the control device 60 as software. Based on the operation position of the setting switch 58, the detection value of the tilt sensor 57, and the detection signal of the stop sensor 50, the rolling control unit 61 (control device 60) operates the electric motor 45 of the rolling mechanism 31 as described below. Then, the seedling planting device 6 and the ground leveling device 23 are rolled.

(Operating state of rolling control unit based on the detection value of the tilt sensor)
For example, when the set tilt angle is set to the horizontal position by the setting switch 58, the seedling planting device 6 (detected value of the tilt sensor 57) is in the horizontal position, and the machine body 3 is in the horizontal position in the left-right direction. As shown in FIGS. 3, 6 and 8, the drive shaft 38 and the rotating body 39 are stopped at the central position of the rotation range (between the right and left rolling limits).

In the state shown in FIGS. 3 and 6, the seedling stand 13 is on the right (left) as described in the above-mentioned (overall configuration of the seedling planting device) (support structure of the seedling stand of the seedling planting device). When the seedlings are driven laterally, the seedling planting device 6 tends to tilt from the horizontal position (set tilt angle) to the right-down posture (left-down posture) due to the weight of the seedling rest 13 and the seedlings of the seedling rest 13.

The right spring 49 is stretched by the lateral feed drive of the seedling stand 13 (support rail 25) to the right, and the seedling planting device 6 is moved from the horizontal position (set inclination angle) by the urging force of the right spring 49. The state of trying to tilt to the right downward posture is prevented, and the seedling planting device 6 is maintained at the horizontal position (set tilt angle).

If the seedling planting device 6 cannot be maintained at the horizontal position (set tilt angle) only by the urging force of the right spring 49, the drive shaft 38 and the rotating body 39 are moved by the electric motor 45 based on the detection value of the tilt sensor 57. It is rotationally driven to the side A1.

As a result, the right wire 47 is wound around the rotating body 39 and pulled by the rotating body 39, and the left wire 48 is fed out from the rotating body 39 and pushed out from the rotating body 39, via the right and left springs 49. The seedling planting device 6 is rolled to a horizontal position (set inclination angle). When the seedling planting device 6 is rolled to the horizontal position (set tilt angle), the electric motor 45 stops based on the detection value of the tilt sensor 57.

In the state shown in FIGS. 3 and 6, when the seedling stand 13 is laterally driven to the left, the left spring 49 is stretched, and the seedlings are planted by the urging force of the left spring 49 as described above. The state in which the device 6 tries to tilt from the horizontal position (set tilt angle) to the left downward posture is prevented, and the seedling planting device 6 is maintained at the horizontal position (set tilt angle).

If the seedling planting device 6 cannot be maintained at the horizontal position (set tilt angle) only by the urging force of the left spring 49, the drive shaft 38 and the rotating body 39 are separated by the electric motor 45 based on the detection value of the tilt sensor 57. It is rotationally driven to the side A2.

As a result, the left wire 48 is wound around the rotating body 39 and pulled by the rotating body 39, and the right wire 47 is unwound from the rotating body 39 and pushed out from the rotating body 39, via the right and left springs 49. The seedling planting device 6 is rolled to a horizontal position (set inclination angle). When the seedling planting device 6 is rolled to the horizontal position (set tilt angle), the electric motor 45 stops based on the detection value of the tilt sensor 57.

In the state shown in FIGS. 3 and 6, for example, when the aircraft 3 tilts from the horizontal position to the right downward posture and the seedling planting device 6 tilts from the horizontal position to the right downward posture, based on the detection value of the tilt sensor 57, The drive shaft 38 and the rotating body 39 are rotationally driven to one side A1 by the electric motor 45. When the seedling planting device 6 is rolled to the horizontal position (set tilt angle), the electric motor 45 stops based on the detection value of the tilt sensor 57.

In the state shown in FIGS. 3 and 6, for example, when the aircraft 3 tilts from the horizontal position to the left downward posture and the seedling planting device 6 tilts from the horizontal position to the left downward posture, based on the detection value of the tilt sensor 57, The drive shaft 38 and the rotating body 39 are rotationally driven to the other side A2 by the electric motor 45. When the seedling planting device 6 is rolled to the horizontal position (set tilt angle), the electric motor 45 stops based on the detection value of the tilt sensor 57.

When the set tilt angle is changed from the horizontal position to another value by the setting switch 58, the electric motor 45 performs the same as described above so that the detection value of the tilt sensor 57 becomes the set tilt angle by the setting switch 58. The drive shaft 38 and the rotating body 39 are rotationally driven to one side A1 and the other side A2.

(Operating state of the rolling control unit based on the detection signal of the stop sensor)
As described above, when the drive shaft 38 and the rotating body 39 are rotationally driven by the electric motor 45 to one side A1 and the other side A2, the stop operation unit 51 rotates to one side A1 and the other side A2 to rotate the elastic body 52. Approach.

As shown in FIGS. 8 to 9, when the drive shaft 38 and the rotating body 39 are rotationally driven to one side A1 by the electric motor 45 and the drive shaft 38 and the rotating body 39 reach the left rolling limit, the stop operation unit The end portion 51a of the 51 comes into contact with the vicinity of the portion 52d of the elastic body 52 from an oblique direction with respect to the arrangement direction (left-right direction) in the vicinity of the portion 52d of the elastic body 52.

When the end portion 51a of the stop operation portion 51 comes into contact with the vicinity of the portion 52d of the elastic body 52, the elastic body 52 is elastically deformed downward, and the engaging portion 52c of the elastic body 52 is displaced from the receiving portion 37c of the support bracket 37. Apart from the lower side, the central portion 52f of the elastic body 52 comes into contact with the contact portion 50a of the stop sensor 50.

As a result, the stop signal of the stop sensor 50 is output to the rolling control unit 61 (control device 60), and the rolling control unit 61 (control device 60) stops the electric motor 45.

In this case, the drive shaft 38 and the rotating body 39 may rotate to one side A1 beyond the left rolling limit due to a delay in the stop operation of the electric motor 45 or the like. When the drive shaft 38 and the rotating body 39 rotate to one side A1 beyond the left rolling limit, as shown in FIGS. 6 and 7, the contact portion 54 hits the stopper portion 55, so that the drive shaft 38 and the rotating body 39 Is forcibly stopped.

As shown in FIGS. 8 to 10, when the drive shaft 38 and the rotating body 39 are rotationally driven to the other side A2 by the electric motor 45 and the drive shaft 38 and the rotating body 39 reach the right rolling limit, the stop operation unit The end portion 51b of 51 comes into contact with the vicinity of the portion 52e of the elastic body 52 from an oblique direction with respect to the arrangement direction (left-right direction) in the vicinity of the portion 52e of the elastic body 52.

When the end portion 51b of the stop operation portion 51 comes into contact with the vicinity of the portion 52e of the elastic body 52, the elastic body 52 is elastically deformed downward, and the engaging portion 52c of the elastic body 52 is displaced from the receiving portion 37c of the support bracket 37. Apart from the lower side, the central portion 52f of the elastic body 52 comes into contact with the contact portion 50a of the stop sensor 50.

As a result, the stop signal of the stop sensor 50 is output to the rolling control unit 61 (control device 60), and the rolling control unit 61 (control device 60) stops the electric motor 45.

In this case, the drive shaft 38 and the rotating body 39 may rotate to the other side A2 beyond the right rolling limit due to a delay in the stop operation of the electric motor 45 or the like. When the drive shaft 38 and the rotating body 39 rotate to the other side A2 beyond the right rolling limit, as shown in FIGS. 6 and 7, the contact portion 54 hits the stopper portion 55, so that the drive shaft 38 and the rotating body 39 Is forcibly stopped.

(First alternative form of carrying out the invention)
The elastic body 52 may be supported in a double-sided manner in which both one side and the other side portion of the elastic body 52 are supported by the support bracket 37.
The elastic body 52 may be formed of an elongated round bar made of metal instead of a leaf spring.

When the elastic body 52 is abolished and the drive shaft 38 and the rotating body 39 reach the right and left rolling limits, the ends 51a and 51b of the stop operation unit 51 come into direct contact with the contact portion 50a of the stop sensor 50. It may be configured as follows.

(Second alternative form of carrying out the invention)
The stop operation unit 51 is provided on the other side (rear side) of the rotating body 39 in the direction (front-rear direction) of the rotating shaft core P2 on the outer peripheral portion of the rotating body 39 in a side view. It may be provided in a portion on the rear side with respect to 39a, and may be provided in a portion on the second shaft support portion 42 side of the rotating body 39. In this case, the stop sensor 50 (elastic body 52) may be provided on the support portion 34 of the substrate 32.

When configured as described above, the contact portion 54 is provided on one side (front side) of the rotating body 39 in the direction (front-back direction) of the rotating shaft core P2 on the outer peripheral portion of the rotating body 39 in a side view. It is provided in a portion on the front side with respect to the groove portion 39b of the rotating body 39, and is provided in a portion on the first shaft support portion 41 side of the rotating body 39. In this case, the stopper portion 55 may be provided on the support bracket 37.

(Third alternative form of carrying out the invention)
In the configuration shown in FIG. 7, the drive shaft 38 penetrates the first shaft support portion 41 and projects to the opposite side (front side) of the rotating body 39, and the drive gear 40 causes the first shaft support portion 41 on the drive shaft 38. It may be connected to the portion protruding from the rotating body 39 on the opposite side (front side). In this configuration, the electric motor 45 and the gear mechanism 46 may be provided on the support bracket 37.

(Fourth alternative form of carrying out the invention)
In the above-mentioned (second alternative embodiment of the invention), the drive gear 40, the electric motor 45, and the gear mechanism 46 may be arranged as shown in FIG.
In the above-mentioned (second alternative embodiment of the invention), the drive gear 40, the electric motor 45 and the gear mechanism 46 may be arranged as described in the above-mentioned (third alternative embodiment of the invention).

In the above-mentioned (second alternative form of carrying out the invention) (third alternative form of carrying out the invention) and (fourth alternative form of carrying out the invention) of this section, the first axis support portion 41 is the second axis support portion. Therefore, the support bracket 37 may be the second support member, the second shaft support portion 42 may be the first shaft support portion, and the support portion 34 may be the first support member.

(Fifth alternative form of carrying out the invention)
The first shaft support portion 41 and the second shaft support portion 42 may be formed of metal bearings instead of synthetic resin.

(Sixth Alternative Form of Implementation of the Invention)
When the drive shaft 38 and the rotating body 39 are rotationally driven to one side A1 and the electric motor 45 is stopped at the left rolling limit, the drive shaft 38 and the rotating body 39 are rotationally driven from the stop position to the other side A2. Then, the electric motor 45 may be operated so that the drive shaft 38 and the rotating body 39 are stopped at a position where the end portion 51a of the stop operation unit 51 is separated from the elastic body 52.

When the drive shaft 38 and the rotating body 39 are rotationally driven to the other side A2 and the electric motor 45 is stopped at the right rolling limit, the drive shaft 38 and the rotating body 39 are rotationally driven from the stop position to the one side A1. Then, the electric motor 45 may be operated so that the drive shaft 38 and the rotating body 39 are stopped at a position where the end portion 51b of the stop operation unit 51 is separated from the elastic body 52.

The present invention can be applied not only to a riding type rice transplanter but also to a working machine such as a riding type direct sowing machine equipped with a sowing device (corresponding to a working device) (not shown) for supplying seeds to the rice field surface. It can also be applied to work machines that are not equipped with.

6 Seedling planting device (working device)
23 Ground leveling device (working device)
31 Rolling mechanism 34 Support part (second support member)
37 Support bracket (first support member)
38 Drive shaft 39 Rotating body 40 Drive gear 41 1st shaft support 42 2nd shaft support 45 Electric motor 47 Wire (linking member)
48 wire (linking member)
50 Stop sensor 50a Contact part 51 Stop operation part 54 Hit part 55 Stopper part 57 Tilt sensor 61 Rolling control part A1 One side A2 Other side P1 Shaft core P2 Rotating shaft core

Claims (8)

It is equipped with a work device that is supported by the machine so that it can roll around the axis in the front-rear direction, a tilt sensor that detects the tilt angle of the work device in the left-right direction, and a rolling mechanism that rolls the work device. ,
To the rolling mechanism
A drive shaft that integrally supports the rotating body so that it can rotate,
A first shaft support portion that rotatably supports a portion of the drive shaft on one side with respect to the rotating body, and a second shaft that rotatably supports a portion of the drive shaft on the other side of the rotating body. Support part and
An electric motor that rotationally drives the drive shaft to one side and the other side,
Right and left linking members extending from the rotating body to the right and left sides and connected to the right and left portions of the rotating body in the working device are provided.
Based on the detection value of the tilt sensor, the electric motor is operated to rotationally drive the drive shaft to one side and the other side, and the right and left linking members are pulled by the rotating body and the rotating body. A work machine provided with a rolling control unit that rolls the work device so that the detection value of the tilt sensor becomes a set tilt angle when pushed out from. The working machine according to claim 1, wherein the first shaft support portion and the second shaft support portion are made of resin. A stop operation unit that is integrally rotatably provided on the rotating body and
A stop sensor provided on the first support member that supports the first shaft support portion is provided.
The rolling control unit
The work machine according to claim 1 or 2, wherein when the rotating body is rotationally driven to one side and the other side and the stop operation unit comes into contact with the contact portion of the stop sensor, the electric motor is stopped. The stop sensor is located between the first support member and the second support member that supports the second shaft support portion when viewed from a direction orthogonal to the rotation axis core of the rotating body. The working machine according to claim 3, which is provided on the first support member. The working machine according to claim 4, wherein the electric motor is provided on the second support member. The drive shaft penetrates the second shaft support portion and projects to the opposite side of the rotating body.
The drive gear is connected to a portion of the drive shaft that protrudes from the second shaft support portion on the opposite side of the rotating body.
The work machine according to claim 5, wherein the electric motor rotationally drives the drive gear to rotationally drive the drive shaft. A contact portion that is integrally rotatably provided on the rotating body and
A stopper portion provided on the first support member or the second support member is provided.
Even if the rotating body is rotationally driven to one side and the other side and the stop operation unit contacts the contact portion of the stop sensor, when the rotating body rotates to one side and the other side, the contact portion is said. The working machine according to any one of claims 4 to 6, wherein the rotating body is stopped by hitting the stopper portion. The stop operation portion is provided on the portion of the rotating body on the side of the first shaft support portion, and the contact portion is provided on the portion of the rotating body on the side of the second shaft support portion.
The working machine according to claim 7, wherein the stopper portion is provided on the second support member.

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