JPH0591222U - Arrangement structure of solenoid valve for horizontal control of planting part of rice transplanter - Google Patents

Abstract

(57) [Abstract] [Purpose] In a configuration in which a switching valve that controls the front-rear horizontal direction of the planting part during the planting work of the rice transplanter is attached to a part of the work equipment mounting device, the response of the hydraulic cylinder in the control. So that there is no difference in [Structure] A hydraulic cylinder for tilting the planting part forward and backward is provided on a link of a working machine mounting device, and a switching valve for controlling the hydraulic cylinder is arranged to be substantially horizontal to the left or right or front and back during standard planting work. Is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switching valve arrangement for increasing the responsiveness of a switching valve that controls pitching, that is, swaying in the front-back direction due to unevenness of a field during operation of a rice transplanter.

[0002]

[Prior Art]

 Conventionally, when the rice transplanter is working, the planting part is tilted back and forth due to the unevenness of the field and the planting is not stable.Therefore, the float part is equipped with a sensor that detects the height difference between the float and the field surface. Based on the detection of the sensor, the control device provided in the traveling section operates the hydraulic device provided in the traveling section to raise and lower the entire link connecting the planting section, Therefore, the entire planting section was raised and lowered to deal with unevenness. However, rotating the entire link to raise and lower the planting part requires a long working distance and delays control. Therefore, in order to improve the responsiveness of the operation, a structure in which a hydraulic cylinder is provided at a part of the link to control pitching can be considered.

[0003]

[Problems to be solved by the device]

 However, in such a structure, when the switching valve of the hydraulic cylinder is provided in the hydraulic cylinder, the switching valve is inclined during the work, and the spool of the switching valve is always subjected to downward gravity. Therefore, there is a delay in the response. For example, when the spool of the switching valve is pushed rearward with the planting part lowered, the rear is inclined downward, so acceleration is applied to the push-out of the spool, resulting in a quick response. On the contrary, in the case where the planting part is lowered and the spool is pushed forward, the spool is pushed upward, so the responsiveness deteriorates and the control becomes unbalanced. is there.

[0004]

[Means for Solving the Problems]

 The present invention uses the following means in order to solve the above problems. That is, a hydraulic cylinder for inclining the planting part of the rice transplanter back and forth is provided on the link of the work equipment mounting device, and a switching valve for controlling the hydraulic cylinder should be substantially horizontal to the left and right or front and back during standard work. It is arranged in a hydraulic cylinder.

[0005]

[Action]

 When the switching valve is mounted horizontally or horizontally on the hydraulic cylinder, the spool of the switching valve has almost no relation to gravity and there is no difference in sliding speed. Will come to do so.

[0006]

【Example】

 The problems and configurations to be solved by the present invention are as described above. Next, embodiments of the present invention shown in the accompanying drawings will be described. Fig. 1 is an overall side view of the rice transplanter, Fig. 2 is a partial side view when the spools of the solenoid valve are horizontally arranged, Fig. 3 is the same front sectional view, and Fig. 4 is the planting part descending section. It is a partial side view when it arrange | positions so that it may become front-back horizontal at times.

The overall structure of the rice transplanter will be described with reference to FIG. The planting section B is attached to the rear of the running section of the rice transplanter via the work implement mounting device 1 including the top link 1a and the lower link 1b. The planting section B feeds the seedlings mounted on the seedling mounting table 2 downward and plantes them in the field with the planting claws 3. The float 4 is arranged below the seedling table.

The planting section B is moved up and down by vertically rotating the working machine mounting device 1 with a hydraulic cylinder 7 provided in the traveling section A. It should be raised while turning or moving on the road. Then, at the time of planting work, a hydraulic cylinder 5 for front-rear horizontal control is arranged in a part of the top link 1a so as to make the planting part horizontal and the signal from the inclination sensor provided in the planting part B is arranged. A solenoid valve SV, which is a switching valve driven by, is attached to the hydraulic cylinder 5, and the hydraulic cylinder 5 is expanded and contracted by switching the solenoid valve SV so that the planting portion B becomes horizontal.

As shown in FIGS. 2 and 3, the solenoid valve SV attached to the hydraulic cylinder 5 is arranged so that the spool 6 of the solenoid valve SV is horizontally horizontal. When the hydraulic cylinder 5 is contracted when moved, that is, the planting part is raised, and when it is moved to the right, it is extended, that is, when the planting part is lowered, it is horizontal regardless of which direction the spool is moved. There is no difference in the moving time, and therefore, there is no difference in the operating time of the hydraulic cylinder, and the control is stable. However, tilting to the left and right is affected by gravity, but it is negligible and has little effect on control.

FIG. 4 shows an embodiment in which the spool 6 is arranged so as to be horizontal in the front-rear direction when the planting part B is lowered. In this configuration, the front-rear horizontal control of the planting section B is performed during the planting operation, that is, when the planting section B is being lowered, and therefore the spool 6 is kept in the state where the planting section B is lowered. If the front and rear are set horizontally, the spool 6 from that state is operated forward or backward, so that there is almost no difference in operating time.

[0011]

[Effect of the device]

 The present invention has the following effects by being configured as described above. That is, when the planting part is lowered and the planting work is being performed and the front-rear horizontal control of the planting part is performed, the plant is attached to the hydraulic cylinder for front-rear horizontal control attached to the work machine mounting device. There is no difference in operating time when switching the spool of the switching valve. Therefore, when extending and contracting the hydraulic cylinder, the operating time becomes uniform, and stable front-rear horizontal control is possible.

[Brief description of drawings]

FIG. 1 is an overall side view of a rice transplanter using the present invention.

FIG. 2 is a partial side view when the spools of the solenoid valves are horizontally arranged.

FIG. 3 is a front sectional view of the same.

FIG. 4 is a partial side view when the spool is arranged so as to be horizontal in the front and rear when the planting portion is lowered.

[Explanation of symbols]

 1a Top link 5 Hydraulic cylinder 6 Spool SV solenoid valve

Claims (1)

[Scope of utility model registration request] 1. A hydraulic cylinder for tilting a planting part of a rice transplanter back and forth is provided in a link of a working machine mounting device, and a switching valve for controlling the hydraulic cylinder is left and right or front and back substantially horizontally during standard work. Arrangement structure of the solenoid valve for horizontal control of the front and rear of the planting part of the rice transplanter, which is arranged in the hydraulic cylinder as much as possible.