JP2019170316A - Paddy field implement - Google Patents

Abstract

To provide a paddy field implement capable of performing gear change of power transmitted to a work device, smoothly without gear change shock.SOLUTION: A sulky type rice transplanter includes a seedling planting device 5 for performing seedling planting on a field, a traveling HST 6 performing gear change of an engine driving force, a spacing HST 7 for performing gear change of power from the traveling HST 6 and transmitting it to the seedling planting device 5, a set space selection operation part 23 for selecting and operating a planting interval S of seedlings to the filed by the seedling planting device 5 from a plurality of set spaces, and a gear change stage setting part 27 for setting a gear change stage of the spacing HST 7 corresponding to a selected set interval.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a paddy field machine provided with a working device for planting or sowing seedlings on a rice field.

  As such a paddy field machine, for example, the paddy field machine described in Patent Document 1 is already known. Patent Document 1 includes a working device for planting seedlings on a rice field (“Seedling planting device [4]” in the literature), a transmission for shifting engine driving force (“Main transmission device [31]” in the literature), A paddy field work machine (in the literature, “rice transplanter”) equipped with a speed change apparatus (in the literature, “inter-strain transmission mechanism [36]”) that shifts power from the transmission and transmits it to the work apparatus is disclosed. Yes.

JP 2005-237281 A

  In the paddy field machine described in Patent Document 1, since the transmission for the working device is constituted by a gear-type transmission, there is room for improvement from the viewpoint of smoothly shifting the power transmitted to the working device without a shift shock. There is.

  In view of the above situation, there is a demand for a paddy field machine that can smoothly shift the power transmitted to the work apparatus without a shift shock.

  The features of the present invention are a working device for planting or sowing seedlings on a rice field, a transmission for shifting engine driving force, a continuously variable transmission for shifting power from the transmission and transmitting it to the working device, A setting interval selection operation unit that selects and operates a work interval with respect to the surface by the working device from a plurality of setting intervals; a gear step setting unit that sets a gear step of the continuously variable transmission according to the selected setting interval; There is in being provided.

  According to this characteristic configuration, since the transmission for the working device is configured by a continuously variable transmission, the power transmitted to the working device can be smoothly shifted without a shift shock. In addition, although the transmission for the working device is a continuously variable transmission, the correspondence between the set interval and the speed of the continuously variable transmission is clear, thereby improving the operability for the operator. .

  Furthermore, in the present invention, it is preferable that a work interval adjustment unit that adjusts the work interval according to the actual vehicle speed of the machine body is provided.

  According to this feature configuration, the work interval can be accurately adjusted so that the actual work interval matches the set interval.

  Further, in the present invention, a receiving device that receives position information from a satellite, and a vehicle speed calculation unit that calculates an actual vehicle speed of the airframe based on the position information received by the receiving device are provided, and the work interval adjustment unit includes: It is preferable to adjust the work interval according to the actual vehicle speed calculated by the vehicle speed calculation unit.

  According to this characteristic configuration, the vehicle speed calculation unit immediately calculates the actual vehicle speed of the airframe based on the position information received by the receiving device, and the work interval adjustment unit according to the actual vehicle speed of the airframe calculated by the vehicle speed calculation unit. Adjust the work interval. Thereby, the work interval can be adjusted with higher accuracy so that the actual work interval matches the set interval.

  Further, in the present invention, a wheel rotational speed sensor for detecting the rotational speed of the wheel is provided, and the vehicle speed calculation unit is configured to detect an actual vehicle speed of the vehicle based on a detection value of the wheel rotational speed sensor when the receiving device is malfunctioning. Is preferably calculated.

  A correlation is recognized between the detected value of the wheel speed sensor and the actual vehicle speed of the aircraft. According to this characteristic configuration, when the receiving apparatus is malfunctioning, it is possible to avoid a situation in which the work interval cannot be adjusted by using the wheel rotation number sensor as an alternative means.

  In the present invention, it is preferable that the vehicle speed calculation unit calculates an actual vehicle speed of the airframe based on a detection value of the wheel rotation number sensor in consideration of a predetermined wheel slip ratio.

  According to this characteristic configuration, the slip ratio of a predetermined wheel is reflected in the actual vehicle speed calculated by the vehicle speed calculation unit, and the actual vehicle speed of the aircraft can be accurately calculated.

  Furthermore, in the present invention, an input rotation speed sensor that detects a rotation speed of power input to the continuously variable transmission is provided, and the vehicle speed calculation unit is configured to input the input rotation speed when the wheel rotation speed sensor is malfunctioning. It is preferable to calculate the actual vehicle speed of the airframe based on the detection value of the sensor.

  A correlation is recognized between the detected value of the input rotational speed sensor and the actual vehicle speed of the aircraft. According to this characteristic configuration, when the receiving device and the wheel rotational speed sensor are out of order, the situation in which the work interval cannot be adjusted can be avoided by using the input rotational speed sensor as an alternative means.

  Further, in the present invention, it is preferable that the transmission and the continuously variable transmission are configured by a hydrostatic continuously variable transmission.

  According to this characteristic configuration, the transmission of power transmitted to the work device can be performed more smoothly.

It is a left view which shows a riding type rice transplanter. It is a top view which shows a riding type rice transplanter. It is a figure which shows a control block.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated based on drawing. In the following description, the direction of the arrow F is the “front side” (see FIGS. 1 and 2), the direction of the arrow B is “the rear side” (see FIGS. 1 and 2), and the direction of the arrow L is “ The left side of the body (see FIG. 2) and the direction of the arrow R are the right side of the body (see FIG. 2).

[Overall configuration of riding rice transplanter]
1 and 2 show a riding type rice transplanter (corresponding to a “paddy field machine” according to the present invention). This riding type rice transplanter includes a pair of left and right front wheels 1, a pair of left and right rear wheels 2, a body frame 3, a driving unit 4, and a seedling planting device 5 for planting seedlings on a rice field ("work" Equivalent to a device "). At the front of the aircraft, the engine E, the transmission case M, the traveling HST 6 (corresponding to the “transmission” according to the present invention), and the inter-stock HST 7 (corresponding to the “continuously variable transmission” according to the present invention, see FIG. 3). Is provided. A receiving device 8 that receives position information from a satellite for GPS (Global Positioning System) is provided above the front of the aircraft. The driving unit 4 is provided with a driver seat 9 on which a driver is seated and a steering handle 10 for a steering operation.

[Seedling planting equipment]
As shown in FIGS. 1 and 2, the seedling planting device 5 is supported by a rear portion of the machine body frame 3 through a link mechanism 11 so as to be movable up and down. In this embodiment, the seedling planting device 5 is configured by an eight-row planting type seedling planting device. However, the number of planting strips of the seedling planting device 5 is not limited to eight. The seedling planting device 5 includes a seedling stage 12 on which eight strips of mat-shaped seedlings are placed, a planting arm 13, a feed case (not shown), a planting transmission case 14, a rotating case 15, and a float 16 And are provided.

  The rotating case 15 is rotatably supported on each of the left and right sides of the rear portion of the planting transmission case 14. The planting arm 13 takes out the seedling from the seedling stage 12 and plantes it on the rice field. The planting arm 13 is rotatably supported by both free ends of the rotating case 15. The engine driving force from the feed case is transmitted to the rotating case 15 through the planting transmission case 14, whereby the rotating case 15 is rotationally driven and the seedling is planted by the planting arm 13.

[Power transmission configuration]
As shown in FIGS. 1 and 3, the traveling HST 6 is a continuously variable transmission that changes the engine driving force, and in this embodiment, is configured by a hydrostatic continuously variable transmission. The traveling HST 6 is connected to the left side of the mission case M.

  The inter-strain HST 7 is a continuously variable transmission that shifts the power from the traveling HST 6 and transmits it to the seedling planting device 5. In the present embodiment, the HST 7 is configured by a hydrostatic continuously variable transmission. The inter-stock HST 7 is connected to the right side of the mission case M.

  The inter-stock HST 7 is provided with a trunnion shaft 17 for operating a swash plate (not shown). A drive mechanism 18 (such as an electric motor) that rotates the trunnion shaft 17 and an angle sensor 19 that detects the rotation angle of the trunnion shaft 17 are provided.

  The transmission case M includes a gear-type auxiliary transmission (not shown) and a gear-type inconstant transmission 20. The inequality transmission 20 changes the angular velocity of the output power with respect to the input power. In the region from when the planting arm 13 takes out the seedling from the seedling platform 12 and plantes it on the rice field, the rotational speed of the rotary case 15 can be slightly increased or decreased by the inequal speed transmission 20.

  As shown in FIG. 1, the driving force of the engine E is transmitted to the traveling HST 6 via the transmission belt 21. Then, the power shifted by the traveling HST 6 is branched in parallel into the traveling transmission system and the work transmission system, and the traveling transmission system power is transmitted to the left and right front wheels 1 and left and right through the auxiliary transmission. While being transmitted to the rear wheel 2, the power of the work transmission system is transmitted to the seedling planting device 5 through the inter-strain HST 7, the inconstant speed transmission 20, and the like.

[Control block]
As shown in FIG. 3, the control block includes a control device 22, a set stock selection operation unit 23 (corresponding to a “setting interval selection operation unit” according to the present invention), a reception device 8, an angle sensor 19, A rear wheel rotational speed sensor 24 (corresponding to a “wheel rotational speed sensor” according to the present invention), an input rotational speed sensor 25, and an output rotational speed sensor 26 are provided.

  The rear wheel speed sensor 24 detects the speed of the rear wheel 2 and is provided inside the rear axle case. The input rotation speed sensor 25 detects the rotation speed of power input to the inter-stock HST 7 (in other words, power output from the traveling HST 6), and is provided in the mission case M. The output rotation speed sensor 26 detects the rotation speed of the power output from the inter-stock HST 7 and is provided in the mission case M.

  The set inter-strain selection operation unit 23 is used to select and operate a seedling planting interval S (corresponding to “work interval” according to the present invention) between a plurality of set strains. In the present embodiment, the set stock selection operation unit 23 is configured by a setting operation screen provided in the operation unit 4.

  The control device 22 includes a gear position setting unit 27, a vehicle speed calculation unit 28, and a planting interval adjustment unit 29 (corresponding to the “work interval adjustment unit” according to the present invention).

  The gear position setting unit 27 sets the gear position of the inter-stock HST 7 according to the set stock selected by the set stock selection operation unit 23. The drive mechanism 18 rotationally drives the trunnion shaft 17 based on a command from the gear position setting unit 27. A plurality of shift stages of the inter-stock HST 7 corresponding to each of the plural set stocks are set stepwise.

  The vehicle speed calculation unit 28 calculates the actual vehicle speed of the airframe based on the position information received by the receiving device 8. The planting interval adjustment unit 29 sets the planting interval according to the actual vehicle speed calculated by the vehicle speed calculation unit 28 so that the actual stock interval matches the set stock interval (between the set strains selected by the set stock selection operation unit 23). Adjust S. The drive mechanism 18 rotationally drives the trunnion shaft 17 based on a command from the planting interval adjustment unit 29.

  Here, the vehicle speed calculation unit 28 calculates the actual vehicle speed of the airframe based on the detection value of the rear wheel speed sensor 24 when the receiving device 8 is malfunctioning. At that time, the vehicle speed calculation unit 28 calculates the actual vehicle speed of the airframe based on the detection value of the rear wheel speed sensor 24 in consideration of the slip ratio of a predetermined wheel. In the present embodiment, the design value is used as the slip ratio of the predetermined wheel. Further, the vehicle speed calculation unit 28 calculates the actual vehicle speed of the aircraft based on the detected value of the input rotation speed sensor 25 when the rear wheel rotation speed sensor 24 is malfunctioning (the receiving device 8 and the rear wheel rotation speed sensor 24 are malfunctioning). To do.

[Another embodiment]
(1) In the above embodiment, the “paddy field machine” according to the present invention is a riding type rice transplanter. However, instead of this, the “paddy field machine” according to the present invention may be a seeding machine. In this case, the sowing machine includes a seeding device (seeing “working device” according to the present invention) for sowing the rice field, and a continuously variable transmission for shifting the power from the traveling HST 6 to the seeding device. A setting interval selection operation unit that selects and operates a seeding interval for the rice field by the seeding device from a plurality of setting intervals, and a gear position setting unit that sets a gear position of the continuously variable transmission according to the selected setting interval 27 are provided.

(2) In the said embodiment, the setting stock selection operation part 23 is comprised by the setting operation screen. However, it may replace with this and the setting stock selection operation part 23 may be comprised with the lever.

(3) In the above embodiment, the “wheel rotational speed sensor” according to the present invention is constituted by the rear wheel rotational speed sensor 24. However, instead of this, the “wheel rotational speed sensor” according to the present invention may be constituted by a front wheel rotational speed sensor that detects the rotational speed of the front wheel 1.

(4) In the above embodiment, the traveling HST 6 is constituted by a hydrostatic continuously variable transmission. However, instead of this, the “transmission” according to the present invention may be configured by a transmission (for example, a gear-type transmission) other than the hydrostatic continuously variable transmission.

(5) In the above embodiment, the inter-stock HST 7 is configured by a hydrostatic continuously variable transmission. However, instead of this, the “continuously variable transmission” according to the present invention may be constituted by a continuously variable transmission other than the hydrostatic continuously variable transmission.

(6) In the above embodiment, when the tooth of the detection gear detected by the rear wheel rotation speed sensor 24 is missing, the rotation speed of the rear wheel 2 is detected based on the rotation (pulse signal) tendency of the detection gear. It may be.

(7) In the above embodiment, when the rear wheel speed sensor 24 is malfunctioning, the input speed sensor 25 is used as an alternative means. On the other hand, when the input rotational speed sensor 25 is malfunctioning, the rear wheel rotational speed sensor 24 may be used as an alternative means. For example, the vehicle speed calculation unit 28 calculates the actual vehicle speed of the airframe based on the detection value of the rear wheel speed sensor 24 when the input speed sensor 25 is malfunctioning (the receiving device 8 and the input speed sensor 25 are malfunctioning). May be.

(8) In the above-described embodiment, the position of the sub-transmission lever for shifting the sub-transmission device is detected, and the detected value of the rear wheel speed sensor 24 and the input speed sensor are determined based on the position of the sub-transmission lever. It is also possible to convert 25 detected values. Further, the detection value of the rear wheel rotation speed sensor 24 and the detection value of the input rotation speed sensor 25 are compared, and based on the comparison result between the detection value of the rear wheel rotation speed sensor 24 and the detection value of the input rotation speed sensor 25. Thus, the position of the auxiliary transmission lever can also be determined.

  In addition, this invention is not limited to the said embodiment and said another embodiment, Other various changes are possible.

  The present invention can be used for a sowing machine as well as a riding type rice transplanter.

5 Seedling planting device (working device)
6 Driving HST (Transmission)
7 Stock HST (continuously variable transmission)
8 Receiver 23 Set stock selection operation section (Set interval selection operation section)
24 Rear wheel speed sensor (wheel speed sensor)
25 Input Rotational Speed Sensor 27 Shift Speed Setting Unit 28 Vehicle Speed Calculation Unit 29 Planting Interval Adjustment Unit (Work Interval Adjustment Unit)
S Planting interval (work interval)

Claims (7)

A working device for planting or sowing seedlings on the rice field;
A transmission for shifting the engine driving force;
A continuously variable transmission that shifts power from the transmission and transmits it to the working device;
A setting interval selection operation unit for selecting and operating a work interval for the surface by the working device from a plurality of setting intervals;
A paddy field work machine comprising: a gear position setting unit that sets a gear position of the continuously variable transmission according to the selected setting interval.   The paddy field work machine according to claim 1, further comprising a work interval adjustment unit that adjusts the work interval according to an actual vehicle speed of the machine body. A receiving device for receiving position information from a satellite;
A vehicle speed calculation unit that calculates the actual vehicle speed of the aircraft based on the position information received by the receiving device, and
The paddy field work machine according to claim 2, wherein the work interval adjustment unit adjusts the work interval according to an actual vehicle speed of the machine body calculated by the vehicle speed calculation unit. A wheel speed sensor for detecting the wheel speed,
The paddy field work machine according to claim 3, wherein the vehicle speed calculation unit calculates an actual vehicle speed of the machine body based on a detection value of the wheel rotation speed sensor when the receiving device is malfunctioning.   The paddy field work machine according to claim 4, wherein the vehicle speed calculation unit calculates an actual vehicle speed of the machine body based on a detection value of the wheel rotation speed sensor in consideration of a slip ratio of a predetermined wheel. An input rotational speed sensor for detecting the rotational speed of the power input to the continuously variable transmission,
The paddy field work machine according to claim 4 or 5, wherein the vehicle speed calculation unit calculates an actual vehicle speed of the machine body based on a detection value of the input rotation speed sensor when the wheel rotation speed sensor is malfunctioning.   The paddy field work machine according to any one of claims 1 to 6, wherein the transmission and the continuously variable transmission are configured by a hydrostatic continuously variable transmission.

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