JPH044923U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a side view of a snowplow showing an embodiment of the present invention, Fig. 2 is a front view of the snowplow, Fig. 3 is a schematic plan view showing the structure of the snowplow's chute device and blower, Figure 4 is a perspective view of the snowplow's potentiometer and its cover installed, and Figure 5 is a hydraulic circuit diagram of the snowplow's chute telescopic cylinder.
Fig. 6 is a flowchart explaining the self-zero adjustment function of the control device of the snowplow, Fig. 7 is a time chart explaining the operation of the control device of the snowplow, and Fig. 8 explains the problems of the present invention. It is a schematic diagram of the cylinder part for. DESCRIPTION OF SYMBOLS 1...Snowplow, 2...Vehicle body, 3...Auger, 4...Blower, 5...Chute device, 6...Snow removal device, 7...Chute section, 8...Swivel section, 9...
... Inner cylinder, 10 ... Inverted cylinder, 12 ... Chute body, 13 ... Chute telescopic cylinder, 15 ...
...First cap, 17...Cap cylinder, 1
8...Second cap, 19...Third cap, 2
0...Blower case, 21...Tilt cylinder, 2
2...first potentiometer, 23...second
potentiometer, 24... third potentiometer, 25... fourth potentiometer, 31... cover, 35... swivel motor, 36...
...First solenoid valve, 37... Second solenoid valve, 39... Control device, a... Stroke signal, b... Stroke position command signal.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A snowplow in which a snow-throwing chute device is configured to be telescopically movable by a cylinder and rotatable around a vertical axis by a swing motor, wherein the position of the telescopically movable chute device by the cylinder a first potentiometer for detecting the rotational position of the chute device by the swing motor; a second potentiometer for detecting the rotational position of the chute device by the swing motor; A snowplow comprising a control means for driving the cylinder and the swing motor while performing comparison calculations with the telescopic movement and rotational stroke position command signals of the chute device. 2. The control means drives the cylinder in the entire operating range when starting snow removal or erasing the data of the stroke signal of the potentiometer corresponding to the operating range of the cylinder or swing motor, and receives feedback from the first potentiometer. Self-zero adjustment that memorizes the end positions of both ends of the cylinder from a stroke signal, drives the swing motor over the entire operating range, and stores the end positions of both ends of the swing motor using a stroke signal fed back from a second potentiometer. The snowplow according to claim 1, further comprising the following functions. 3. The cylinder is a hydraulic cylinder, the swing motor is a hydraulic motor, and on/off solenoid valves are provided for positioning the hydraulic cylinder and the hydraulic motor, respectively.The control means controls the stroke position command signal and the stroke signal of the potentiometer. The function is to calculate the deviation, turn on each solenoid valve according to the result, and turn on the solenoid on the opposite side of the solenoid valve for a predetermined period of time when the stroke position command signal and the stroke signal reach within the allowable control range. The snowplow according to claim 1, further comprising: a snowplow. 4 A bypass hydraulic circuit is provided in the hydraulic circuit of the solenoid valve, a second solenoid valve is provided in the bypass hydraulic circuit, and the control means is configured to control the second solenoid when the deviation between the stroke position command signal and the stroke signal falls within a predetermined range. 4. The snowplow according to claim 3, further comprising a function of turning on the valve to slow down the cylinder operating speed to improve control accuracy.