JP2010142136A - Agricultural implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural implement that detects whether difference in rotation occurs or not in a power transmission part arranged in the middle of a transmission part for transmitting rotation power from a tractor and is mounted on the tractor. <P>SOLUTION: In the agricultural implement that inputs rotation power from a tractor, transmits the inputted rotation power to the transmission part, outputs the power at an operation part and carries out a farm operation and is mounted on a tractor, the agricultural implement includes a first detection part 4 that is equipped with a power transmission part 10 for transmitting power to the transmission part under a prescribed condition and detects the rotation of the transmission part at the input side from the power transmission part 10, a second detection part 5 that detects the rotation of the transmission part at the output side from the power transmission part 10, and a control part 2 that acquire information from the two detection parts 4 and 5 and detects whether difference in rotation occurs or not in the power transmission part 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an agricultural machine, and more particularly, to an agricultural machine that is mounted on a tractor that detects whether or not there is a rotational difference in a power transmission unit provided in the middle of a transmission unit that transmits rotational power from a tractor.

  Some farm machines mounted on the tractor perform farm work by obtaining rotational power from the tractor. There is an agricultural machine having a power transmission unit having functions such as prevention of overload and transmission in the opposite direction in the middle of the transmission unit that transmits the rotational power.

  For example, Patent Document 1 describes an overload prevention device in an agricultural machine having a shear pin penetrated through a joint between a universal joint and an input shaft.

Japanese Patent Application Laid-Open No. 2003-228561 describes a farm work machine provided with a one-way clutch that prohibits power transmission from the working unit side to the power input side.
JP-A-63-33709 JP 2002-301952 A

  However, the above-described power transmission unit may not be noticed by the operator that it performs its function, which may cause a safety problem or lead to product damage.

  For example, even if the shear pin described in Patent Document 1 is broken, the tilling claw may rotate due to inertial force or friction at the periphery, and the operator is not aware of the breaking of the shear pin. May continue. However, in this case, the shear pin is broken, and the power required for the work is not transmitted. Therefore, if the tractor is advanced as it is, the work machine may be damaged.

  In addition, in the case of the one-way clutch described in Patent Document 2, even if the operator turns off the PTO of the tractor, the rotating shaft rotates in the cover by the inertial force, and the operator does not notice this and approaches the rotating shaft. If it is dangerous.

  In view of the above problems, the present invention provides an agricultural machine that is mounted on a tractor that detects whether or not there is a rotational difference in a power transmission unit that is in the middle of a transmission unit that transmits rotational power from a tractor. Objective.

  In order to achieve the above object, the agricultural machine according to the present invention is the agricultural machine installed in the tractor that inputs the rotational power from the tractor and transmits the input rotational power in the transmission unit and outputs it in the working unit to perform the agricultural work. A power transmission unit that transmits power under a certain condition is interposed in the transmission unit, a first detection unit that detects rotation of the transmission unit on the input side from the power transmission unit, and an output side from the power transmission unit. A second detection unit that detects rotation of the transmission unit; and a control unit that acquires information from the two detection units and detects whether or not there is a rotation difference in the power transmission unit. To do.

Furthermore, the agricultural machine according to the present invention includes a reporting unit, and the reporting unit reports when the control unit detects that a rotational difference has occurred in the power transmission unit.
Furthermore, the agricultural machine according to the present invention is characterized in that the power transmission unit transmits rotational power having a torque below a certain level.
Furthermore, the agricultural machine according to the present invention is characterized in that the power transmission unit transmits only rotational power in one direction.

  ADVANTAGE OF THE INVENTION According to this invention, it can detect whether the rotation difference has arisen in the power transmission part which has in the middle of the transmission part which transmits the rotational power from a tractor in an agricultural machine.

  The best mode for carrying out the present invention will be described.

  FIG. 1 is a system configuration diagram of a rotation difference detection system included in an agricultural machine according to the present invention. The agricultural machine according to the present invention is attached to a tractor for agricultural work. The rotation difference detection system 1 includes a control unit 2, a notification unit 3, a first detection unit 4, a second detection unit 5, a power transmission unit 10, a rotation unit (input side) 11, and a rotation unit. (Output side) 12. Rotational power from the tractor is transmitted to the rotating unit (input side) 11 and further transmitted to the rotating unit (output side) 12 via the power transmission unit 10. The transmitted power is transmitted to the working unit and used as power necessary for the work of the agricultural machine.

  The rotating units 11 and 12 are rotating bodies included in a transmission unit that transmits rotational power. The rotating unit (input side) 11 is closer to the input side (tractor side) than the power transmitting unit 10, and the rotating unit (output side) 12 is It exists in the output side (working part side) from the power transmission part 10, and these are comprised by a shaft, a gear, etc., for example.

  The power transmission unit 10 is provided with a mechanism for transmitting power under certain conditions such as prevention of overload and transmission in the opposite direction, and is provided in the middle of the transmission unit, for example, shear pin, clutch joint, one-way It is a mechanism composed of a clutch or the like.

  The first detection unit 4 is a device that can detect the rotation of the rotation unit (input side) 11, and the second detection unit 5 is a device that can detect the rotation of the rotation unit (output side) 12, for example, a proximity switch, Magnet switches, photoelectric switches, centrifugal force switches, etc. These detect whether or not they are simply rotating, whether or not they are rotating above a certain level, or the number of rotations.

  The control unit 2 is configured by a CPU or the like, acquires rotation information from the two detection units 4 and 5, and detects whether or not there is a rotation difference in the power transmission unit 10 based on this information. . And the signal for making the report part 3 make a required report is transmitted. For example, when the information from the detection units 4 and 5 is information on the number of revolutions, it is possible to control the reporting unit 3 to report when the difference in the number of revolutions is greater than or equal to an allowable value. In addition, when the information from the detection units 4 and 5 is rotating or not, when the information is rotated while one is not rotated, the reporting unit 3 reports that there is a rotation difference, etc. Can be controlled. In addition, when the information from the detection units 4 and 5 is a rotation of a certain level or more, if one is a rotation of a certain level or more and the other is not a rotation of a certain level or more, the reporting unit 3 determines that there is a rotation difference. It can be controlled to notify.

  In addition, when the rotation parts 11 and 12 are shifting with respect to the power transmission part 10 via a gear etc., it is converted by the detection parts 4 and 5 and the control part 2 in consideration thereof, and is rotated by the power transmission part 10. It is determined whether a difference has occurred.

  Based on the signal from the control unit 2, the reporting unit 3 provides notification of whether or not a rotation difference has occurred, notification of the number of rotations of the rotation units 11 and 12, notification of two rotation differences, and the like. It is performed by the light by the sound, the sound by the buzzer, the display by the liquid crystal, etc. The control unit 2 and the reporting unit 3 may be an integrated control box.

  Specific examples will be described below.

  FIG. 2 is a plan view illustrating the agricultural machine according to the first embodiment. The working machine according to the first embodiment is a wrinkle coater, in which the mounting portion 20 is mounted on the rear portion of the tractor, and PTO power from the tractor is input to form a wrinkle in the working portion. The working unit 29 includes a cultivating unit 26, a rectifying unit 27, and a top surface cutting unit 28. It is formed into a ridge shape by the rotation of the disk 27a of the rectifying section 27. In addition, an upper surface shaving portion 28 is provided in the front, and the upper surface of the old heel is shaved by the rotation of the claws 28a, thereby contributing to the formation of a strong heel.

  On the other hand, the mounting portion 20 and the working portion 29 are connected by an arm 21. Both ends of the arm 21 are supported by and connected to the mounting portion 20 and the working portion 29 in a horizontal direction. Thus, the offset working machine can change the position of the working unit 29 with respect to the mounting unit 20. Thereby, when not working, it is moved to the center to improve the balance of the center of gravity, and is moved to the opposite side to enable back work.

  The transmission unit will be described. The power from the tractor is transmitted from the input shaft 31 to the work side input shaft 22 via the joint 30. The power transmitted to the work side input shaft 22 is output to the tilling shaft 26a and the disk 27a at an appropriate number of rotations via gears and shafts in the work side frame 25. Even if the position of the working portion 29 is changed with respect to the mounting portion 20 by the joint 30, the transmission mechanism can be kept connected.

  FIG. 3 is a side view showing the first embodiment of the joint portion 30 of FIG. In addition, a partial cross-sectional view is shown for explanation. The transmission joint 30 transmits the power of the input shaft 31 to the wide-angle portion 32 constituted by a CV yoke or the like, and is transmitted to the yoke member 34 via the shaft portion 33. The yoke member 34 has a flange portion 34a and is in contact with the flange portion 35a of the connecting member 35 on the surface. And the shear pin 36 is inserted in the form which penetrates the holes 34b and 35b which each flange part 34a and 35a has. Thereby, the rotational power of the yoke member 34 and the connecting member 35 is connected and transmitted by the shear pin 36. The connecting member 35 and the work side input shaft 22 are joined by a spline or the like, and power is transmitted to the working part side.

  The rotation of the input shaft 31 is detected by the detection unit (input side) 4. The rotation of the work side input shaft 22 is detected by the detection unit (work side) 5. As long as the shear pin 36 is not broken, there is no rotation difference detected by the control unit 2. On the other hand, when the shear pin 36 is broken due to a torque exceeding a specified value, the power from the input shaft 31 is not transmitted to the work side input shaft 22, and the rotation of the work side input shaft 22 is reduced or stopped. If the rotation difference in this case is detected by the control unit 2 and this is reported by the reporting unit 3, the operator can immediately know that the shear pin 36 has been broken, stop the work, and damage the agricultural machine. Without changing the shear pin 36.

  FIG. 4 is a side view showing a second embodiment of the joint part of FIG. In addition, a partial cross-sectional view is shown for explanation. The transmission joint 30 ′ of FIG. 4 is different from FIG. 3 in that the mechanism between the yoke member 41 and the work side input shaft 22 is not a shear pin mechanism but a pin clutch portion 42. The same parts as those in FIG. 3 are denoted by the same reference numerals.

  Power from the yoke member 41 is transmitted to the work side input shaft 22 via the pin clutch portion 42. At this time, when a torque exceeding a certain level works, the pin clutch portion 42 does not transmit power to the work side input shaft 22. On the other hand, when the torque is below a certain level, the pin clutch unit 42 resumes transmission of power to the work side input shaft 22.

  The rotation of the input shaft 31 is detected by the first detection unit 4. Then, the rotation of the work side input shaft 22 is detected by the second detector 5. While the pin clutch unit 42 is properly transmitting power, there is no rotation difference detected by the control unit 2. On the other hand, when the pin clutch portion 42 is acted upon by applying a torque exceeding a specified value, the power from the input shaft 31 is not transmitted to the work side input shaft 22, and the rotation of the work side input shaft 22 is reduced or stopped. . If the rotation difference in this case is detected by the control unit 2 and this is reported by the reporting unit 3, the operator does not stop the work and damage the working unit 29 or the like.

  FIG. 5 is a plan view illustrating the agricultural machine according to the second embodiment. The working machine of the second embodiment is a wrinkle coater, in which the mounting portion 20 is mounted on the rear portion of the tractor, PTO power from the tractor is input, and wrinkle forming is performed in the working portion. The working unit 29 includes a cultivating unit 26, a rectifying unit 27, and a top surface cutting unit 28. It is formed into a ridge shape by the rotation of the disk 27a of the rectifying section 27. In addition, an upper surface shaving portion 28 is provided in the front, and the upper surface of the old heel is shaved by the rotation of the claws 28a, thereby contributing to the formation of a strong heel.

  On the other hand, the mounting portion 20 and the working portion 29 are connected by an arm 21. Since both ends of the arm 21 are rotatably supported and connected to the mounting unit 20 and the working unit 29 in the horizontal direction, an offset working machine capable of changing the position of the working unit 29 with respect to the mounting unit 20 is obtained. Thereby, when not working, it is moved to the center to improve the balance of the center of gravity, and is moved to the opposite side to enable back work.

  FIG. 6 is a transmission diagram of the agricultural machine according to the second embodiment. The transmission unit will be described. The power from the tractor is transmitted to the input shaft 51. The input shaft 51 has a flange portion 52 mounted on the output side, and abuts on the surface with a flange portion 53 mounted on the input side of the intermediate shaft 55. And each flange part 52 and 53 has a through-hole, and the shear pin 54 is inserted in the form which penetrates these holes. Thereby, the rotational power of the input shaft 51 and the intermediate shaft 55 is transmitted through the shear pin 54.

  The intermediate shaft 55 has a first bevel gear 56 mounted on the output side, and the first bevel gear 56 meshes with a second bevel gear 57 mounted on a drive shaft 58 to transmit power. After the drive shaft 58, the third bevel gear 62 and the fourth bevel gear 63 are engaged with each other, and power is transmitted to the work side transmission unit 61, and rotational power is transmitted from the work side transmission unit 61 to the tilling claw 26b, the disk 27a, and the claw 28a. Reportedly. The configuration up to the input shaft 51 is a configuration that can cope with the case where the position of the working unit 29 is changed with respect to the mounting unit 20, for example, a joint or a chain case structure that can rotate at both ends. It is done. Moreover, the work side transmission part 61 is comprised with required elements, such as a shaft, a gear, and a chain.

  The rotation of the input shaft 51 is detected by the first detection unit 4. The rotation of the drive shaft 58 is detected by the second detection unit 5. As long as the shear pin 54 is not broken, there is no rotation difference detected by the control unit 2. Note that the shift by the bevel gears 56 and 57 is detected by the detection units 4 and 5 and the control unit 2 as having no rotation difference. On the other hand, when the shear pin 54 is broken due to a torque exceeding a specified value, the power from the input shaft 51 is not transmitted to the drive shaft 58, and the rotation of the drive shaft 58 is reduced or stopped. If the rotation difference in this case is detected by the control unit 2 and this is reported by the reporting unit 3, the operator can immediately know that the shear pin 54 has been broken, stop the work, and break the farm work machine. Without changing the shear pin 54.

  The configuration of the second embodiment can be applied to an agricultural machine that cannot attach a shear pin structure to a joint.

  FIG. 7 is a plan view illustrating the agricultural machine according to the third embodiment. FIG. 8 is a side view showing the agricultural machine according to the third embodiment. The agricultural machine of Example 3 is a mower.

  The mowing machine of Example 3 attaches the attachment part 81 to the rear part of the tractor. Next, the transmission unit will be described. The power from the tractor is transmitted from the input shaft 71 into the mission case 82, and is transmitted to the first drive shaft 72 via a gear or the like in the mission case 82. The rotational power of the first drive shaft 72 is transmitted to the second drive shaft 74 via the one-way clutch 73. The power of the second drive shaft 74 is transmitted to the belt 76 in the belt case 83 provided on the side surface of the mower, and further transmitted to the claw shaft 77 provided in the cover 84 below the mission case 82.

  The claw shaft 77 has a claw for mowing. When the claw shaft 77 is rotated, a mowing operation can be performed. On the other hand, when the operator stops the PTO drive of the tractor, the claw shaft 77 remains rotated by the inertial force. However, since the one-way clutch 73 does not transmit power from the second drive shaft 74 to the first drive shaft 72, power due to the inertial force of the pawl shaft 77 is not transmitted to the tractor side. This prevents the tractor from unintentionally moving forward through the PTO due to the inertial force of the pawl shaft 77.

  The rotation of the first drive shaft 72 is detected by the first detection unit 4. The rotation of the second drive shaft 74 is detected by the second detection unit 5. The PTO power from the tractor is transmitted from the first drive shaft 72 to the second drive shaft 74 by the one-way clutch 73. In this case, the rotation difference is not detected by the control unit 2. On the other hand, when the PTO drive of the tractor is stopped, the first drive shaft 72 stops rotating quickly, but the second drive shaft 74 continues to rotate for a while due to the inertial force of the pawl shaft 77. At this time, if the control unit 2 detects the rotation difference and notifies the notification unit 3 of this, the operator can know that the claw shaft 77 is still rotating in the cover 84 and prevent danger. it can.

It is a system configuration figure of the rotation difference detection system which the agricultural working machine of the present invention has. It is a top view which shows the agricultural machine of Example 1. FIG. It is a side view which shows 1st Embodiment of the joint part of FIG. It is a side view which shows 2nd Embodiment of the joint part of FIG. It is a top view which shows the agricultural machine of Example 2. It is a transmission diagram of the agricultural working machine of Example 2. It is a top view which shows the agricultural machine of Example 3. It is a side view which shows the agricultural working machine of Example 3.

Explanation of symbols

2 control unit 3 reporting unit 4 first detection unit 5 second detection unit 10 power transmission unit 11, 12 rotating unit 29 working unit 30, 30 ′ transmission joint 34 yoke member 35 connecting member 36 shear pin 41 yoke member 42 pin clutch Part 51 Input shaft 54 Shear pin 55 Intermediate shaft 72 First drive shaft 73 One-way clutch 74 Second drive shaft 77 Claw shaft

Claims (4)

In the agricultural machine installed in the tractor that inputs the rotational power from the tractor and transmits the input rotational power in the transmission unit and outputs it in the working unit to perform farming work,
A power transmission unit that transmits power under a certain condition is interposed in the transmission unit, a first detection unit that detects rotation of the transmission unit on the input side from the power transmission unit, and an output side from the power transmission unit. A second detection unit that detects rotation of the transmission unit; and a control unit that acquires information from the two detection units and detects whether or not a rotational difference is generated in the power transmission unit. Agricultural working machine. The agricultural machine according to claim 1,
An agricultural machine having a reporting unit, and reporting by the reporting unit when the control unit detects that a rotational difference has occurred in the power transmission unit. In the agricultural machine according to claim 1 or 2,
The agricultural machine according to claim 1, wherein the power transmission unit transmits rotational power having a torque below a certain level. In the agricultural machine according to claim 1 or 2,
The power transmission unit transmits only rotational power in one direction.

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