JPH0591208U - Work implement control device for tractor - Google Patents

Abstract

(57) [Summary] [Purpose] The work equipment attached to the tractor is driven immediately before the work surface, and the power is automatically cut off when the work machine is raised and is not working. [Structure] A grounding member is vertically provided below the working machine, a lower end of the grounding member is made longer than a lower end of the working machine, a working machine clutch is provided in a power take-out section, and the working machine is operated by a signal from the grounding member. It is controlled by the controller to drive the working machine immediately before it is grounded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work implement clutch control configuration for switching the transmission of a driving force of a tractor to a work implement.

[0002]

[Prior Art]

 Conventionally, there has been known a technology in which power is transmitted from a PTO shaft to a working machine via a transmission provided in a transmission case of a tractor, and the disconnection / contact of the power of the PTO shaft is linked to the lifting state of the working machine. It has become. In other words, the angle of the lifting link connecting the work implement at the rear of the tractor is detected by an angle grounding member, etc., and when it is detected that the link has descended below a certain angle, the driving force is transmitted from the tractor to the work implement. The work machine clutch was connected to drive the work machine.

[0003]

[Problems to be solved by the invention]

 However, the method of switching the clutch by detecting the link angle requires changing the set angle each time, because the grounding position of the working machine changes due to unevenness of the field, etc., and it is suitable for the field condition. It was very difficult to get the timing for switching the clutch. If the proper clutch switching timing is not obtained, there is a problem that even if the working machine is raised, the working machine is in danger of being driven, or the working machine is grounded but not driven. It happens.

[0004]

[Means for Solving the Problems]

 The present invention uses the following means in order to solve the above problems. That is, a grounding member is hung vertically below the work implement mounted on the rear of the tractor, and the lower end of the grounding member has a height at which it is grounded immediately before the work implement is grounded. The work implement clutch and the ground member are connected to the controller, and the work implement clutch is turned on when the ground member is grounded.

[0005]

[Action]

 When the working machine is lowered, the grounding member is grounded immediately before the working machine is grounded, whereby the signal is input to the controller 7, the working machine clutch is turned on, and the working machine is driven. is there. However, if only one earth member is grounded (or touches something), the clutch is not connected. Therefore, when the work implement is ungrounded and the earth member suddenly contacts something, the work implement clutch is not connected.

[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 a side view of a tractor T equipped with a work implement clutch of the present invention in which a rotary work implement R is mounted, FIG. 2 is a block diagram showing a drive system of a tractor T, and FIG. 3 is a control of the work implement clutch. It is a circuit diagram.

FIG. 1 shows a structure in which a rotary cultivator R as a working machine is connected to a rear portion of a tractor T via a working machine mounting device 1. The work implement mounting device 1 is moved up and down by a hydraulic cylinder OC in a hydraulic case mounted on the upper part of the transmission case M of the tractor T. A grounding member 3 is arranged in the front part of the rotary tiller R, and the grounding member 3 is vertically erected on the front part of the rotary claw 2 in a pair to the left and right, and the lower end part of the grounding member 3 is connected to the rotary member. It is arranged so as to be located slightly below the lowermost end of the claw 2. However, three or more ground members 3 may be provided in the width direction, and the height of the ground members 3 can be adjusted.

The work implement mounting device 1 comprises a top link 1a, a lower link 1b, and a lift link 1d, which is connected to the forefront part of the rotary tiller R, and a PTO shaft is projected from the rear surface of the mission case M. Power is transmitted to the gearbox of the rotary cultivator R via the universal joint or the like to the PTO shaft, the working machine clutch 4 is provided in the gearbox, and the cultivating pawl shaft is moved from the working machine clutch 4. It is possible to drive. However, the work implement clutch 4 can also be arranged in the mission case M. The PTO transmission RC is arranged in the mission case M as shown in the figure and is driven by the power from the engine E.

The arrangement of the work implement clutch of the present invention will be described with reference to FIG. The output shaft of the engine E of the tractor T is transmitted to the mission case M via the main clutch MC operated by the clutch pedal, drives the axle from the main transmission device Ma via the auxiliary transmission device Mb, and The transmission Ma is transmitted from the transmission Ma through the PTO transmission RC to the PTO shaft that transmits the driving force to the working machine, and the PTO shaft of the rotary tiller R is further rotated from the PTO shaft through the working machine clutch 4. Of.

The working machine clutch 4 has a structure in which a claw clutch is operated by an electromagnetic clutch or a solenoid, and is operated by a control structure as shown in FIG. That is, since the work implement clutch 4 and the earth members 3L and 3R are connected to the controller 7 and the rotary tiller R is raised in the non-working state, the earth member 3 is in the non-grounding state and the power source ( The battery 5 charges the capacitor 6 with a voltage to maintain a constant voltage, the positive side of the capacitor 6 is connected to the earth member 3R, the negative side is connected to the earth member 3L, and each is connected to the controller 7, The controller 7 detects the voltage. In such a circuit configuration, when the grounding members 3L and 3R are grounded, the electricity held in the capacitor is discharged, the voltage drops, and the controller 7 detects the voltage and controls the work implement clutch 4. It is.

With the above configuration, when the rotary tiller R is lowered during work, both of the ground members 3L and 3R are grounded immediately before the working machine is grounded, and thereby the voltage is increased. The controller 7 calculates that the ground voltage has been reached and turns on the work implement clutch 4. That is, at the same time when the working machine is grounded, the working machine is brought into the working state and the tilling pawl 2 is rotated so that the working machine can be smoothly entered. On the other hand, when the rotary tiller R is raised and the earth members 3L and 3R are in the non-grounded state, the circuit is immediately charged, the voltage becomes equal to or higher than the set value, and the work implement clutch 4 is disengaged. Since the drive of the work machine is stopped, the work machine is not operating in the non-working state. However, the work implement clutch 4 does not operate even if only one of the earth members 3L and 3R is grounded, and the work implement is not driven even if the earth member 3 is inadvertently contacted, which also serves as a safety device. ..

[0012]

[Effect of the device]

 The present invention has the following effects by being configured as described above. That is, since the grounding member is in the grounding state immediately before the working machine is in the grounding state and the working machine clutch is input, the grounding position of the working machine is changing due to the unevenness of the field surface. When the working machine is grounded at all times, the clutch is turned on and the working machine is driven smoothly, and when the working machine is raised, the ground member is immediately brought into a non-grounded state and the working machine is ungrounded. Since the clutch is disengaged, the work machine is not operating in a non-working state, so it is safe and quiet. Therefore, as in the past, by changing the link angle when the work equipment touches the ground depending on the field condition, the problem that the work equipment does not drive even when touching the ground and that the work equipment drives when it is not working is solved. Of. Furthermore, since two or more ground members are attached and the structure of the working machine clutch does not apply even if only one of them is in contact, it is possible that something happens to touch the ground member. However, it is safe because it prevents the work machine from being driven even when not in work.

[Brief description of drawings]

FIG. 1 is a side view of a tractor T equipped with a work implement clutch according to the present invention with a rotary tiller attached thereto.

FIG. 2 is a block diagram showing a drive system of a tractor T.

FIG. 3 is a control circuit diagram of a work implement clutch.

[Explanation of symbols]

 T tractor R rotary tiller 3 grounding member 4 work equipment clutch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoru Okada 1-32, Chaya-cho, Kita-ku, Osaka City, Osaka Prefecture Yanmar Agricultural Machinery Co., Ltd. (72) Hiroshi Kawabuchi 1-32, Chaya-cho, Kita-ku, Osaka-shi, Osaka No. Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Taiji Mizukura 1-32 Chayamachi, Kita-ku, Osaka City, Osaka Prefecture Yanmar Agricultural Machinery Co., Ltd. (72) Wataru Nakagawa 1-32, Chayamachi, Kita-ku, Osaka City, Osaka Prefecture No. Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A grounding member is vertically provided below a working machine to be mounted behind a tractor, and a lower end portion of the grounding member has a height at which it is grounded immediately before the working machine is grounded, and a working machine clutch is provided. A work implement control device for a tractor, wherein the work implement clutch is provided in a power take-out portion, the work implement clutch and an earth member are connected to a controller, and the work implement clutch is turned on when the earth member is grounded.