JPH076209Y2 - Earth Pitch Pitch Attitude Notification Device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an earthworking plate pitch attitude notifying device for informing the longitudinal pitch attitude of an earthworking board in a machine having an earthworking board such as a bulldozer.

[Conventional technology]

An earthwork plate such as a bulldozer is as shown in FIG. 5, and the earthwork plate a is rotatably connected to the tips of the left and right frames b. The left and right upper parts of the earthwork plate a and the left and right frames b. By extending and contracting the pitch cylinders c, c connected between the earthworking plate a and the b, the longitudinal pitch posture of the earthwork plate a is controlled. Further, the earthwork plate a is tilted by extending one of the pitch cylinders c, c and shortening the other.

The above-mentioned control is performed by a lever device provided in the driver's seat.

[Problems to be solved by the invention]

In the conventional pitch control of the earthwork plate a, it is difficult to know the pitch posture accurately because the pitch posture of the earthwork plate a is judged by looking at the back surface of the earthwork plate a from the driver's seat. It was difficult to adjust to the neutral position which is the middle of the stroke.

[Means and Actions for Solving Problems]

The present invention has been made in view of the above, and an object of the present invention is to provide a pitch attitude control device for an earthworking board, which makes it possible to easily know the pitch neutral attitude of the earthworking board, which is difficult to detect visually from behind. The structure is a pitch neutral position detector that detects a deviation from the neutral position of the pitch motion of the earthwork plate in the earthwork plate in which the pitch posture of the earthwork plate is controlled by expanding and contracting the left and right pitch cylinders. In addition to providing a notification means such as a buzzer whose notification interval changes according to the deviation signal from the pitch neutral position detector, the pitch attitude of the earthwork plate can be determined by detecting the notification interval of the notification means. I can know.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS.

In the figure, reference numeral 1 is a traveling device of a bulldozer, 2 is a left and right frame whose rear end is rotatably connected to the frame of the traveling device 1 in the vertical direction, and 3 is rotatably connected to the tips of both frames 2. The earthworking plates 4 are left and right pitch cylinders that connect the left and right upper portions of the earthworking plate 3 and the left and right frames 2, and these structures are substantially the same as those of the conventional example. Reference numeral 4 is adapted to be expanded and contracted by operating an operation lever (not shown) at the driver's seat so that the earthwork plate 3 is pitched in the front-rear direction.

A pitch neutral position detector 5 for detecting the neutral position of the stroke of the rod of the pitch cylinder 4 is mounted on one of the left and right pitch cylinders 4, 4. The pitch neutral position detector 5 is connected to the controller 6, and an output signal corresponding to the deviation from the neutral position of the pitch cylinder 4 is input to the controller 6. A buzzer 7 and a volume adjusting switch 8 for the buzzer 7 are connected to the controller 6.

In the controller 6, the signal from the pitch neutral position detector 5 is received and a notification signal is output to the buzzer 7, and the buzzer 7 sounds at intervals according to the deviation from the pitch neutral time.
This sounding interval becomes narrowest in the neutral position. The volume at this time is adjusted by the volume adjustment switch 8.

FIG. 3 is a flow chart showing the operation of the controller 6, first reading the set value S _L of the volume adjustment switch 8,
If this is zero, it has no effect. When S _L ≠ 0, the signal from the pitch neutral position detector 5 is read, the deviation ε with respect to this neutral position is calculated, and the buzzer 7 outputs a notification signal of a strength corresponding to this deviation ε and the above S _L. Output to.

The notification signal is a pulse signal as shown in FIG.
Its intensity V _L is proportional to S _L , and its pulse interval 1 / f is ε
Becomes smaller as becomes smaller.

In the above structure, when the volume adjusting switch 8 is turned on and the earthworking plate 3 is pitch-operated, the buzzer 7 depending on the magnitude of the pitch inclination angle in the front-rear direction with respect to the pitch neutral position at this time.
The sounding interval of changes, and sounds at the narrowest interval at the pitch neutral position. The operator can know whether the pitch inclination of the earthwork plate 3 is in the neutral position by listening to this.

In the above configuration, the example in which the buzzer 7 is used as the notification means is shown, but this may be a blinking light. In this case, the volume is replaced by the light quantity, and the buzzer interval is replaced by the blink interval.

[Effect of device]

According to the present invention, it is possible to easily know the pitch neutral position / posture of the earthwork plate 3 which is difficult to visually recognize from the back.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
FIG. 1 is an explanatory view of the structure of the main part, FIG. 2 is a side view of a bulldozer to which the present invention is applied, FIG. 3 is a flowchart, FIG. 4 is a pulse diagram, and FIG. 5 is a perspective view showing a conventional earthwork board device. Is. 3 is an earthwork plate, 4 is a pitch cylinder, 5 is a pitch neutral position detector, and 7 is a buzzer.

Claims (1)

[Scope of utility model registration request] 1. A pitch neutral position for detecting a deviation from a neutral position of the pitch motion of the earthworking plate 3 in the earthworking plate in which the pitch attitude of the earthworking plate 3 is controlled by expanding and contracting the left and right pitch cylinders 4, 4. A pitch attitude informing device for an earthwork board, which is provided with a detector 5 and an informing means such as a buzzer 7 whose informing interval is changed by a deviation signal from the pitch neutral position detector 5.