JPS60227051A - Endless transmission member detector - Google Patents

Abstract

PURPOSE:To accurately attain transmission by providing a control range detector for detecting the proper tension range of an adjust spring of a tension pulley for stretching and pressing an endless transmission member and an excessive slack detector. CONSTITUTION:An endless member 1 is stretched between a driving pulley 8 and a driven pulley 9 which are respectively supported on a driving shaft 6 and a driven shaft 7 supported on a machine body of an agricultural machine or the like. There are provided a control range detector 4 for detecting the proper tension range for keeping constant tension of an adjust spring 3 for pressing a stretching and pressing tensioi pulley 2, and an excessive slack detector 5 for detecting the excessive slackening of the endless member 1. In this arrangement, the endless member 1 can be easily retained under proper tension.

Description

DETAILED DESCRIPTION OF THE INVENTION When transmitting power to each functional part in an agricultural machine or the like by means of an endless body, the aim is to obtain accurate power transmission by always maintaining an appropriate tension in the endless body.

For this reason, the present invention has taken the following technical measures. That is, the tension pulley for tensioning the endless transmission body (1) (
An adjustment detection device (4) that detects an appropriate tension range for keeping the tension of the adjustment spring (3) that presses the adjustment spring (3) constant.
and an over-looseness detection device (5) for detecting over-looseness of the endless body (1).
) in an agricultural machine or the like, the detection device for the transmission endless body (1) is configured as follows.

With this configuration, the present invention has the following technical effects. That is, the transmission endless body (1) stretched between the driving side and the driven side is pressed at an appropriate position by the tension pulley (2) and its adjustment spring (3) so as to give a constant tension to the endless body (1). and transmit it. In such an action, if the pressing force is too strong, the endless body (1) may wear out or
If the elongation is severe or the pressing force is too weak, use an endless body (1)
However, in the present invention, the strength of the adjustment spring (3) is determined by the adjustment detection device (4), and if the pressure is outside the range of appropriate pressure, the strength of the adjustment spring (3) is detected. The detection device (4) detects whether the endless body (1) is abnormal at all times, whereas in conventional agricultural machines, etc., abnormalities in the endless body (1) were only discovered when it caused a functional problem. Detection and adjustment detection device (4)
In case of abnormal elongation of the endless body (1) that exceeds the adjustment limit of the endless body (
1). In this case, it can be replaced with a new endless body (1) or put into a proper suppressed transmission state using another tensioning means, so accurate transmission can be maintained at all times. be.

In the illustrated example, an endless body ( 1), and a tension pulley (2) is supported on one end of the long side of the rotational fulcrum of the tension arm (10) in order to press the endless body (1). The moving fulcrum is rotatably supported by a pin (11) fixed to the fuselage. Also, one end of a tension rod (12) is freely locked at one end of the short side of the arm (10) relative to the rotation fulcrum, and the other end is connected to the adjustment screw (13) of the adjustment interval detection device (4). .

The adjustment screw (13) is connected to an adjustment receiver (14) fixed to the fuselage.
), and then lock it to the receiver (14) and adjust it.
3) Attach the adjustment spring (3) and the detection adjustment nut (15) to press it. The limit switch (16) is attached to the body so that the contact piece comes into contact with the irregularities on the outer periphery of the adjustment nut (15), and the contact (17) enters at the recesses and breaks at the convexities. In addition, an uneven portion is provided at one end of the short side of the tension arm (10) as an over-looseness detection device (5), and a limit is set so that the contact piece comes into contact with the uneven portion and the contact (19) enters at the recess and breaks at the convex portion. Attach the switch (18) to the aircraft. Note that contact (1) of limit switch (16) (18)
7) When (19) enters, each warning lamp (20)
Configure the circuit so that (21) lights up, and a separate warning lamp (20) (21) Inspection switch (22) (2
3) in which power is transmitted from the driving pulley (8) to the driven pulley (9) by the endless body (1), the transmitted horsepower and the endless body (1) depend on the strength of the tension of the endless body (1).
) has a large impact on wear and tear. Therefore, the endless body ( Appropriately adjust the pressing force of the tension pulley (2) against 1). At this time, the contact piece of the limit switch (16) is located on the protrusion of the detection adjustment nut (15), and the warning lamp (20) does not light up. But endless body (1)
extends, the detection adjustment nut (15) moves in the opposite direction to the adjustment receiver (14), and the contact piece of the limit switch (16) moves from the convex part to the concave part, the limit switch (J6)
) is turned on, and a warning lamp (20) as an adjustment detection device (4) lights up. Also, when the endless body (1) stretches significantly and reaches its limit of use, the tension arm (10)
The contact piece of the limit switch (18) that is in contact with the convex part provided on the short side of the limit switch (18) moves to the concave part, and the limit switch (18)
The contact point (19) of 8) is turned on and the warning lamp (21) as the over-slowness detection device (5) lights up. As mentioned above, an endless body (
1) stretches and the initially set proper tension cannot be maintained, the warning lamp (20) of the adjustment detection device (4) lights up, and when the endless body (1) reaches its service limit, too much slack is detected. As the warning lamp (21) of the device (5) lights up, the endless body (1) can be maintained at an appropriate tension state very easily, so accurate transmission can be performed at all times and the endless body (1) ) can extend the life of the

Note that a warning buzzer may be used instead of a warning lamp, or a warning lamp and a warning buzzer may be used together.

[Brief explanation of drawings]

The figures show an embodiment of the invention, and Figure 1 is a side view;
FIG. 2 is a circuit diagram. In the figure, (1) is a transmission endless body, (2) is a tension pulley, (3) is an adjustment spring, (4) is an adjustment detection device, (
5) shows an over-slow detection device. Name of patent applicant: Masataka Iseki, representative of Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] The endless transmission body (1) includes an adjustment detection device (4) that detects an appropriate tension range for keeping the tension of the adjustment spring (3) that presses the tension pulley (2) constant, and the endless body (1). An endless power transmission body (1) in an agricultural working machine, etc., which is provided with an over-slowness detection device (5) for detecting over-slowness of 1).
Detection device.