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CN-115666219-B - Paddy field working machine

CN115666219BCN 115666219 BCN115666219 BCN 115666219BCN-115666219-B

Abstract

In a paddy field working machine in which a working device is supported at the rear of a machine body, mud and water splashed backward from the machine body are made less likely to adhere to a height sensor. The device is provided with a lifting mechanism capable of lifting and lowering a working device relative to a machine body, a floating plate (9) supported in a lifting manner at the lower part of the working device and grounded to follow a field surface (G), and a height sensor (38) arranged at a part of the working device at the rear side of the front end part (9 a) of the floating plate (9) in a side view. The device is provided with a link mechanism (39) which is connected so as to straddle the floating plate (9) and the height sensor (38), and transmits the lifting operation of the floating plate (9) relative to the working device to the height sensor (38), so that the height sensor (38) detects the working height (H2) from the floating plate (9) to the working device. The control unit is provided with a control unit which operates the lifting mechanism so that the working height (H2) reaches the set height (H1) based on the detection value of the height sensor (38).

Inventors

  • TAO TEYA

Assignees

  • 株式会社久保田

Dates

Publication Date
20260508
Application Date
20210607
Priority Date
20200710

Claims (9)

  1. 1. A paddy field working machine is characterized by comprising: A working device which is supported at the rear part of the machine body in a lifting manner and supplies materials to the field; a lifting mechanism capable of lifting and lowering the working device relative to the machine body; a floating plate supported in a liftable manner at the lower part of the working device and grounded to follow the field surface; A height sensor provided in the working device at a portion of the working device that is located at a rear side of the front end portion of the floating plate in a side view; a link mechanism connected so as to straddle the floating plate and the height sensor, and configured to transmit a lifting operation of the floating plate with respect to the working device to the height sensor so that the height sensor detects a working height from the floating plate to the working device; A control unit that operates the lifting mechanism so that the working height reaches a preset height based on a detection value of the height sensor; A setting height changing unit that can change the setting height by changing the supporting position of the floating plate with respect to the working device; The link mechanism is supported by the working device in a manner capable of swinging around a support axis along the left-right direction, The paddy field working machine includes a linkage unit that changes the position of the support shaft center to a lower side with respect to the working device as the set height is changed, and changes the position of the support shaft center to a higher side with respect to the working device as the set height is changed, by operation of the set height changing unit.
  2. 2. The paddy field working machine according to claim 1, wherein, The link mechanism has: A swing member swingably supported by the working device about the support shaft, having a first portion extending forward from the support shaft and connected to the floating plate, and having a second portion extending upward from the support shaft, and And a connecting member disposed along the front-rear direction and connected so as to straddle the input portion of the height sensor and the second portion.
  3. 3. The paddy field working machine according to claim 2, wherein, The input portion extends downward from the height sensor, and a lower portion of the input portion is connected to a rear portion of the connection member.
  4. 4. A paddy field working machine according to claim 2 or 3, wherein, The spring support portion is provided on the rear side with respect to the swing member, A tension spring is connected across the first portion and the spring support, The floating plate is biased downward with respect to the working device via the swing member by the biasing force of the tension spring.
  5. 5. A paddy field working machine according to claim 2 or 3, wherein, The spring support portion is provided on the rear side with respect to the swing member, A tension spring is connected across the first portion and the spring support, The floating plate is biased downward with respect to the working device via the swing member by the biasing force of the tension spring, The paddy field working machine includes a spring interlocking portion which changes a position of the spring supporting portion in a front-rear direction by an operation of the set height changing portion, and maintains a constant urging force of the tension spring.
  6. 6. A paddy field working machine according to any one of claim 1 to 3, wherein, In the working device, a support frame is arranged in the left-right direction at a portion of the working device which is located at the rear side of the front end portion of the floating plate, The working part for supplying materials to the field is connected with the supporting frame and extends to the rear side from the supporting frame, The height sensor is provided at a position on the rear side of the support frame in a side view.
  7. 7. The paddy field working machine according to claim 6, wherein, The paddy field working machine is provided with the right side and the left side of the supporting frame, The paddy field working machine is set with a working state and a non-working state, The work state is a state in which the center side end portions of the left and right center sides of the work implement in the right side support frame are opposed to the center side end portions of the left and right center sides of the work implement in the left side support frame with a gap therebetween, and the right and left side support frames are arranged in the left and right direction, The non-working state is a state in which the right and left support frames are arranged in a left-right direction in a posture along a front-rear direction, The paddy field working machine is provided with a switching mechanism capable of switching the working device between the working state and the non-working state, The link mechanism is disposed between the right and left center side ends of the support frame in the operating state in a plan view.
  8. 8. The paddy field working machine according to claim 7, wherein, A support member is mounted to a central side end portion of the support frame at one of the right and left sides, The height sensor and the link mechanism are supported by the support member.
  9. 9. The paddy field working machine according to claim 8, wherein, In the non-working state, the support frame is disposed in a posture along the front-rear direction such that a center side end portion of the support frame is disposed at a rear side with respect to an end portion of the support frame opposite to the center side end portion.

Description

Paddy field working machine Technical Field The present invention relates to a structure for lifting and lowering a working device at the rear part of a machine body in a paddy field working machine such as a riding rice transplanter or a riding direct seeding machine. Background In a riding rice transplanter, which is an example of a paddy field working machine, as disclosed in patent document 1, a floating plate grounded to follow a paddy field is supported in a vertically movable manner at a lower part of a working device, a height sensor is attached to the working device, and a lever is connected so as to straddle the floating plate and the height sensor. Thus, the height sensor detects the working height from the floating plate (field surface) to the working device, and the working device is lifted and lowered so that the working height reaches a preset height. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2013-59267 Disclosure of Invention Problems to be solved by the invention In a paddy field working machine, mud and water splash rearward from a machine body as the machine travels, and there is room for improvement in that the mud and water splashed rearward are less likely to adhere to a height sensor. The purpose of the present invention is to prevent mud and water splashed from a machine body to the rear from adhering to a height sensor in a paddy field working machine in which a working device is supported at the rear of the machine body. Solution for solving the problem A paddy field working machine of the present invention comprises a working device supported on the rear of a machine body in a liftable manner and supplying a material to a paddy field, a lifting mechanism capable of lifting and operating the working device relative to the machine body, a floating plate supported on the lower part of the working device in a liftable manner and grounded to follow the paddy field, a height sensor provided on the rear side of the front end of the floating plate in the working device in a side view, a link mechanism connected across the floating plate and the height sensor and transmitting the lifting operation of the floating plate relative to the working device to the height sensor so that the height sensor detects the working height from the floating plate to the working device, and a control unit for operating the lifting mechanism based on the detection value of the height sensor so that the working height reaches a preset setting height. According to the present invention, in a working device at the rear of a machine body, a floating plate and a height sensor are provided, and in a state where a link mechanism is connected so as to straddle the floating plate and the height sensor, the height sensor is disposed at a position on the rear side of the front end portion of the floating plate, and is disposed so as to be away from the machine body rearward. Thus, even if mud and water splash rearward from the body, mud and water are less likely to adhere to the height sensor, and deterioration in durability of the height sensor due to adhesion of mud and water can be prevented. In the present invention, it is preferable that the link mechanism includes a swinging member supported by the working device so as to be swingable about a support axis in a left-right direction, a first portion extending forward from the support axis and connected to the floating plate, and a second portion extending upward from the support axis, and a connecting member disposed in a front-rear direction and connected so as to straddle the input portion of the height sensor and the second portion. According to the present invention, the swing member and the connection member are provided in the link mechanism connected so as to straddle the floating plate and the height sensor. When the working height of the working device changes relative to a floating plate which is grounded and follows the field surface, the swinging member of the link mechanism swings around the supporting axis, the connecting member moves back and forth, the lifting motion of the floating plate relative to the working device is transmitted to the height sensor, and the working height from the floating plate to the working device is detected by the height sensor. According to the present invention, the swing member is provided with the second portion extending upward from the support shaft center, and the connection member in the front-rear direction is connected so as to straddle the input portion of the height sensor and the second portion of the swing member. The second portion of the swing member is advantageous in that the height sensor is disposed at a position higher than the floating plate (field surface) and mud and water are less likely to adhere to the height sensor. In the present invention, it is preferable that the input portion extends downward from the height sensor, and a lower portio