JPS6246578Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a load detection device for a working device of a mobile agricultural machine, which is used to determine whether the working device is clogged with mud, grass, etc.

In general, in mobile agricultural machinery such as agricultural tractors, if the working equipment is clogged with processed materials, mud, grass, etc., it will draw more horsepower than necessary, so periodically check to see if the clogging with mud, grass, etc. has progressed beyond the allowable level. Or, it is necessary to make determinations irregularly.

In the past, clogging conditions were determined through visual inspection by workers, which made it difficult to accurately determine the extent of clogging, and as a result, there was a delay in cleaning the work equipment. , resulting in wasted fuel and reduced work efficiency;
If the time for cleaning the work equipment is earlier, the work interruption time becomes longer, which has the disadvantage of causing a decrease in work efficiency.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide a work equipment load detection device for mobile agricultural machinery that allows a worker to accurately grasp the degree of clogging of the work equipment that is running idly. do.

In order to achieve the above-mentioned object, the load detection device for the working implement of a mobile agricultural machine according to the present invention is characterized by comprising a torque detection device that detects the torque of a power take-off shaft that only transmits power to the working implement; a setter that is capable of setting a reference torque value for the power take-off shaft when the working implement is in an idle running state; a control circuit that compares the detected torque of the torque detection device with the reference torque set by the setter and outputs an output signal if the detected torque is greater than the reference torque; a display device that operates when the output signal is input from the control circuit; and an interrupting means that is alternatively capable of switching between a state that allows signal transmission from the control circuit to the display device and a state that restricts it.

The functions and effects of the above characteristic configuration are as follows.

In other words, since the torque of the power take-off shaft that only transmits power to the work equipment during idle operation increases as the work equipment becomes clogged with processing materials, mud, grass, etc., the intermittent means allows the control circuit to The control circuit compares the detected torque detected by the torque detection device with the reference torque set by the setting device according to the work equipment, and this detected torque is set as the reference torque. When the torque is greater than the torque, an output signal is output from the control circuit, this output signal is input to the display device, the display device is activated, and the operation of the display device allows the operator to check the processing material, mud, grass, etc. It is possible to accurately and easily know that the clogging of the working equipment has progressed beyond the allowable level. Therefore, the cleaning time of the working equipment is not too early or too late as in the past, and cleaning can be performed at an appropriate time, making it possible to always maintain efficient working conditions with low fuel consumption.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in Fig. 1, a riding power cultivator, which is an example of a working machine, consists of a pair of left and right lift arms 2, 2 that are driven and oscillated up and down by a single-acting hydraulic cylinder 1, and a rear part of the machine. A rotary tiller B, which is an example of a working device, is attached to the rear of the tractor body A, which is equipped with a power take-off shaft 3 that protrudes toward the direction of the vehicle.
5, the lift arms 2, 2 and lower links 5, 5 are interlocked and connected via lift rods 6, 6, and the power take-off shaft 3 and the tiller B The input shaft 7 is interlocked and connected via a transmission shaft 8 having a universal joint.

As shown in FIG. 2, the transmission section of the tractor main body A comprises a propulsion shaft 11 that is linked to an engine 9 via a clutch 10 and the power take-off shaft 3.
A transmission system 13 capable of shifting in four stages is provided between the transmission shaft 12 and the transmission shaft 12 which is interlocked with the transmission shaft 12, and the transmission system from the propulsion shaft 11 to the rear wheel differential mechanism 14 includes:
A main transmission 15 capable of shifting to four forward speeds and one reverse speed;
Creep transmission device 16 that can change between the same speed drive state and super deceleration state, and the sub-transmission device 1 that can change to two speeds
7 is intervening.

A first pulse generating mechanism is provided between the transmission shaft 12 and the power take-off shaft 3, which generates a pulse signal as the power take-off shaft 3 rotates, and a pulse signal is generated as the power take-off shaft 3 rotates. and a phase difference pulse generation mechanism that generates a phase difference pulse signal having a width corresponding to the phase difference between the pulse signals from both of the pulse generation mechanisms, the phase difference pulse generation mechanism A device 18 is configured to detect the torque of the power take-off shaft 3 during idle operation based on a phase difference pulse signal from the power take-off shaft 3. A state in which the detection signal of the torque detection device 18 and the reference signal from the setting device 19 for setting the reference torque of the power take-off shaft 3 are input to the control circuit 20, and the manual switch 21 serving as the disconnecting means is turned on. When the detected torque increases above the set torque, the visual display device 22 is configured to activate, by means of a blinking lamp, it is time to clean the working equipment.

The setting device 19 is configured to be able to change the reference torque depending on the type of work equipment.

In the above-mentioned embodiment, the intermittent means is configured so that the cleaning timing of the work equipment is checked by operating the manual switch 21. However, in a type such as a rotary tiller that raises the machine for turning, etc., this is not necessary. The intermittent means may be configured to automatically check based on the detection of the upward motion of the working device.

Further, in the above-described embodiment, the cleaning time of the work equipment is displayed using only a lamp, but a lamp and a buzzer may be used in combination, and furthermore, it may be configured to be displayed using a sound. .

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the load detection device for a working device of a mobile agricultural machine according to the present invention, in which Fig. 1 is an overall side view of a riding-type cultivator, Fig. 2 is a transmission system diagram, and Fig. 3 is a block diagram of a safety device. It is a line diagram. 18... Torque detection device, 19... Setting device, 2
0... Control circuit, 21... Intermittent means, 22... Display device.

Claims (1)

[Claims for Utility Model Registration] 1. A torque detection device 18 that detects the torque of the power take-off shaft that only transmits power to the working device, and a torque detection device 18 that detects the torque of the power take-off shaft that only transmits power to the working device, and a torque detecting device 18 that detects the torque of the power take-off shaft that only transmits power to the working device, and Setting device 19 that can set values
and a control circuit 20 that compares both the detected torque of the torque detection device 18 and the reference torque set by the setting device and outputs an output signal if the detected torque is larger than the reference torque.
and a display device 22 that operates when the output signal is input from the control circuit 20, and can be selectively switched between a state in which signal transmission from the control circuit 20 to the display device 22 is permitted and a state in which it is restricted. A load detection device for a working device of a mobile agricultural machine, which is constructed by providing a disconnection means 21. 2. The load detection device for a working device of a mobile agricultural machine according to claim 1, wherein the display device 22 is an audible display device. 3. The load detection device for a working device of a mobile agricultural machine according to claim 1, wherein the display device 22 is a visual display device.