KR20120004024A - Has a automatic travelling function cutter - Google Patents

Abstract

PURPOSE: A road cutter having an automatic traveling function is provided to safely perform a cutting work by preventing damage to a cutting blade. CONSTITUTION: A road cutter having an automatic traveling function comprises a DC motor(12), a worm reducer(13), a clutch(40), a shaft(60), a pair of chain gears, chains(49a), and a controller(50). The DC motor receives power from a battery installed in a main body. The worm reducer is connected to the rotary shaft of the DC motor. The clutch controls the torque of a drive shaft(41) of the worm reducer. The shaft is formed in the bottom of the main body and has wheels(30). The chain gears and chains connect the shaft to a driven shaft(43) of the clutch. The controller controls power supplied to the DC motor.

Description

Has a automatic traveling function cutter}

The present invention relates to a road cutter having an automatic driving function, and more particularly, by cutting the drive means driven by a separate motor for driving at a constant speed during the work of the road cutter can be cut automatically by a certain speed The load generated on the blade can be kept constant.In case of abnormality caused by obstacles such as stones or rebar in the process of cutting the cutting part with constant pressing force and speed, the forward speed is stopped until the abnormality situation is resolved. The present invention relates to a road cutter having an automatic driving function capable of preventing overloading on a cutting blade by stopping driving.

In general, it is necessary to cut asphalt roads or concrete pavements that have been installed on the ground during the construction or renovation of underground water or telecommunication lines or roads. Road cutters are being used.

Meanwhile, referring to FIG. 1, a schematic configuration of a conventional road cutter is a natural cloud in the lower portion of the body 1 and the front wheel 2 for moving the body 1 up and down and the worker move the body 1. The upper handle (3) is connected to the lower rear wheel (4) and the belt (5) so that it can be reversed, and on the upper side, the engine (6) is connected to the cutting blade (7) to generate strong Rotational force is transmitted to the cutting blade (7) is configured to cut the cutting surface and the other side is formed with a handle (8) in the form of a rod to move the body (1) left / right in a position adjacent to the handle (3) do.

Reference numeral 9 is a body angle control lever.

When using the conventional road cutter configured as described above, first, by using the front wheel (2) to lift the front body in an inclined state, the cutting operation of the cutting blade (7) is prevented from being pulled from the ground The user moves to manpower to prepare the cutting work.

Drive the engine 6 in the state where the road cutter is located at the working position as described above to rotate the cutting blade 7 and lower the front of the body 1 so that the cutting blade 7 is cut into the ground to dig into a predetermined position. After cutting and insertion to depth, the operator drives the handle 3 of the body 1 to drive the cutting blade forward while cutting the front of the ground.

As described above, the operator keeps the cutting blade moving forward by continuously rotating the handle to cut the asphalt road or concrete pavement.

However, in the process of cutting a conventional road cutter, as described above, the operator pushes the cutting blade forward by manpower so that the pressing force generated between the cutting surface and the cutting blade is not constant. In addition, if there are stones or rebars on the cutting surface, an overload occurs in the rotation of the cutting blade at a moment, and if the worker does not detect this quickly, there is a problem that the cutting blade, such as the cutting blade is broken or bent, is damaged. Furthermore, there is a problem that a very dangerous situation may occur in which the worker may be injured in the fragments of the broken cutting blade.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to cut the automatic driving at a constant speed by mounting a drive means driven by a separate motor for running at a constant speed when the road cutter works. Road that has automatic driving function to keep the load generated on the blade constant and to use the load generated on the cutting blade stably within the allowable range for long-term use and to increase the efficiency by keeping the load constant on the engine. In providing a cutter.

In addition, another object of the present invention is to stop the traveling speed until the abnormal situation is solved by stopping the forward speed when the abnormal situation occurs due to obstacles such as stones or rebar in the process of cutting the cut portion at a constant pressing force and speed It prevents overloading of cutting blades, and if pressurized load occurs within the allowable range, it constructs a system to move forward again. In providing a road cutter having a.

In addition, another object of the present invention is to mechanically control by using a clutch in the power transmission process transmitted to the wheel can transmit the exact power during the cutting operation and can be prevented from being pushed back to the role of the brake when stopped. When moving, it is to provide a road cutter having an automatic driving function having a configuration that enables the worker to move freely by using manpower by enabling the natural rotation of the wheel.

The present invention has been made in order to achieve the above object, a road cutter having an automatic driving function of the present invention is a DC motor supplied with power from a battery mounted on the main body, the worm is connected to the rotating shaft of the DC motor A reducer, a clutch for controlling the rotation of the drive shaft rotational force of the worm reducer, a shaft formed at the bottom of the main body, and a wheel formed at both sides thereof, a pair of chain gears and chains connecting the shaft and the driven shaft of the clutch; And, it is characterized in that it comprises a controller for controlling the clutch to control the power supply and rotation speed to the DC motor.

In addition, in the clutch, the central portion of one side is connected to the drive shaft, and a fixed bearing is formed at the central portion of the other side, and a drive plate having a plurality of through holes on the outer circumferential surface thereof, and a pair of wedge-type protrusions fitted into the through holes. The central part is formed to be movable left and right by the spline gear of the driven shaft, and the driven plate which is formed with the annular fitting groove integrally on one side, and the hydraulic cylinder is fixed to one side and the other side of the driven plate It is characterized by consisting of a moving plate inserted into the fitting groove to move back and forth the driven plate by the operation of the hydraulic cylinder.

In addition, the controller is connected to the power switch, the instrument panel indicating the resistance value generated between the cutting surface and the cutting blade, the clutch control switch for controlling the operation of the clutch to transmit the power of the DC motor to the wheel, and is connected to the DC motor Variable resistance switch to control the forward speed of the wheel, lever to set the forward and stop of the body, and when the resistance value of the instrument panel exceeds the allowable range, the body stops and then advances every 1-2 seconds to change the resistance value. It is characterized by including the microcomputer to check and advance after the resistance generation factor is eliminated.

As described above, according to the present invention, the body of the road cutter has an automatic driving function which is powered by a battery configured separately from the engine, thereby generating a constant pressing force between the cutting surface and the cutting blade, without causing excessive force to the engine at all times. By having a constant load there is an effect that can prevent the overload of the engine.

In addition, it is possible to reduce the wear rate of the cutting blade by allowing the continuous cutting operation in the load state that does not cause excessive force on the engine and the cutting blade as described above has the effect of having excellent workability can be used for a long time.

In addition, if an abnormal situation occurs due to an obstacle such as a stone or rebar in the process of cutting the cutting part with a constant pressing force and speed, the driving speed is stopped and the driving stops until the abnormal situation is resolved, causing an overload on the cutting blade. When the pressure load occurs within the allowable range, the shearing blade is prevented from being damaged or broken by the obstacle by the system which moves forward, and thus the cutting operation can be safely performed.

In addition, by controlling the clutch mechanically in the power transmission process transmitted to the wheel, it is possible to transmit the exact power during cutting work, to prevent the back to push the role of the brake during stop, and to prevent the natural rotation of the wheel during movement It is possible to move the worker freely by using manpower to enable it has the effect of having excellent workability and convenient mobility at the same time.

1 is a schematic diagram for clarifying the driving relationship of a conventional road cutter.
Figure 2 is a side view of a road cutter with an automatic driving function according to the present invention.
Figure 3 is a cross-sectional view showing the interior of the road cutter having an automatic driving function according to the present invention.
Figure 4 is a perspective view of the clutch portion of the road cutter having an automatic driving function according to the present invention.
5 is a cross-sectional view of the clutch portion of the road cutter having an automatic driving function according to the present invention.
Figure 6 is a flow chart of the controller portion of the road cutter having an automatic driving function according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

2 is a side view of a road cutter having an automatic driving function according to the present invention.

As shown, the road cutter 100 of the present invention is largely formed on the body 10, the front wheel 20 and the rear wheel 30 formed on the lower portion of the body 10, and the upper portion of the body 10. It is composed of an engine (6) for rotating the front blade 7, and a controller (50) formed on the upper portion of the body (10) to control the driving of the road cutter (100).

Here, the structure is assembled to the upper portion of the body 10 and the cutting blade 7 is rotated by the driving of the engine 6 to cut the cutting surface, the front portion of the body 10 to the angle control lever (9) The configuration of the front wheel 20 configured to be lifted and lowered by the cutting blade 7 so as to prevent the cutting blade 7 from being dragged to the ground during the movement of the device and to adjust the cutting depth is the same as that of the conventional road cutter.

A feature of the present invention resides in the automatic driving means for automatically advancing the body 10 in the conventional road cutter and the controller 50 for controlling the automatic driving means, in order to prevent the gist of the present invention from being impaired. (6) and the description of the connection and operation of the cutting blade (7) or the description of the configuration in which the body rotates by the drive of the front wheel is omitted and will be described below automatically through the driving means formed in the interior of the body (10) Simultaneously, a portion in which the traveling speed is controlled by the controller 50 while driving is intensively described.

2 to 3, the road cutter 100 having a road automatic driving function according to the present invention has a battery 11 mounted at the center of the body 10 and the power of the battery 11 is the body. It is formed to be transmitted to the drive motor 12 formed inside the (10).

The drive motor 12 is formed to enable control using the controller 50 by using a DC motor capable of forward and backward rotation and control the rotation speed.

On the other hand, the drive shaft (not shown) of the motor 12 is connected to the reducer 13, and the rotation speed thereof decreases to approximately 60 to 1, and a worm reducer is used to prevent the back of the road cutter in a work space such as a hill. It can be used as a side brake of the car at the time of stop so that the road cutter can be used safely.

In addition, the driving force is reduced by the reducer 13 is controlled that the driving force is transmitted to the wheel by the clutch 40.

That is, the clutch 40 is driven by the drive plate 42 formed on the drive shaft 41 and the driven plate 44 formed on the driven shaft 43 are formed in close contact with and spaced apart from each other, as shown in FIGS. 4 to 5. It serves to transfer from the drive shaft 41 to the driven shaft 43 or to disconnect the driving force to the driven shaft 43.

 The driving plate 42 has a drive shaft 41 connected to the shock reduction gear 13 at the center of one side, and a fixed bearing 41a is formed at the center of the other side, and several holes 41b are integrally formed on the outer circumferential surface thereof. The driven plate 44 is formed with a pair of projections 44b having a wedge shape inserted into the hole 41b at one side with a through hole 44a formed at the center thereof, and the through hole 44a at the other side. The annular fitting groove 44c is integrally formed on the outer circumferential surface thereof.

On the other hand, a driven shaft 43a having a spline gear 43a on one side is inserted into the through hole 44c of the driven plate 44, so that the driven plate 44 is assembled to move left and right.

In addition, the driven plate 44 is maintained by the fixing pin 46 in a state in which one side of the moving plate 45 is fitted in the fitting groove 44c, and the cover (one side of the moving plate 45) 47 is connected to the cylinder 48 assembled to move the moving plate 45 by the operation of the cylinder 48 to move the driven plate 44 forward / backward on the outer peripheral surface of the spline gear (43a). .

On the other hand, the rotational force transmitted to the driven shaft 44 by the clutch 40 is transmitted to the shaft 60 connected to the chain 49a by the chain gear 49, whereby the wheels formed on both sides of the shaft 60 ( 30) will be driven.

On the other hand, the driving of the road cutter described above is controlled by the controller 50 formed of a plurality of buttons.

The controller 50 is formed on the upper portion of the body 10 and consists of a controller formed inside the body 10 and a plurality of button portions exposed to the outside.

The button unit is a clutch for controlling the operation of the clutch 40 and the power switch 52 for transmitting the power of the instrument panel 51 and the battery 11 to the motor 12, the resistance value generated on the cutting blade as a numerical value; The control switch 53, the variable resistance switch 54 for controlling the forward speed of the road cutter 100 and the lever 55 for controlling the forward, stop and reverse of the road cutter.

In addition, a microcomputer (not shown) for controlling each signal is formed inside the controller 50 to control the driving and stopping of the driving motor 12 according to the resistance value displayed on the instrument panel 51. Output the regulated speed by.

Hereinafter, referring to Figure 3 will be described in detail the operation process of the road cutter having an automatic driving function according to the present invention divided into a moving state and a working state and a non-working state.

Movement

First, the operator places the lever 55 of the controller 50 in the stopped state, turns off the power switch 52 and the clutch control switch 53 to cut off the supply of power, and separates the clutch 40 so that the wheel It is formed to be a natural cloud by the manpower and moves to the position to be easily cut.

Working status

In the state in which the road cutter is moved to the cutting position as described above, the operator turns on the clutch control switch 53 and the power switch 52 and places the lever 55 in a stopped state, and then drives the engine to cut the blade ( 7) is formed to rotate, and then using the body angle control lever (9) formed in the body 10 to gradually lower the body 10 to the ground side to form a cutting blade (7) in front of the ground cut into the cut. .

In addition, by using the body angle control lever (9) to cut the cutting to the desired depth, the lever 55 is deformed in the forward state so that the road cutter 100 cutting edge 7 is advanced while cutting the ground. do.

On the other hand, when the cutting operation is hindered by foreign materials such as stones or reinforcing bar under the ground during the cutting operation, a lot of resistance is sharply generated on the cutting blade (7).

At this time, the controller 50 detects a suddenly high resistance value in the process of continuously checking the resistance value and at the same time stops the drive motor to change the safe resistance value by preventing the body 10 from moving forward.

In addition, the controller 50 checks the resistance value generated during the cutting operation in units of 1 to 2 seconds by giving a forward signal at an interval of 1 to 2 seconds while the body 40 is stopped until the cause of resistance is eliminated. By repeating the forward and stop motions, resistance generation factors can be eliminated without difficulty on the cutting blade.

As described above, even when an accident occurs during the cutting operation, the cutting operation can be safely performed.

Non-working state

If the cutting operation is to be stopped for a while due to various factors during the cutting operation, the body is fixed while the front cutting blade 7 continues to rotate by deforming the lever 55 from the forward to the stationary state.

At this time, the body is not pushed back by the worm reducer 13 can be stopped without moving in place to prevent a dangerous situation that the cutter is pushed back when working on the slope.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, it will be understood that various modifications and other embodiments are possible to those skilled in the art.

100 ... road cutter 10 ... body 11 ... battery
12 ... DC motor 13 ... Reducer 20 ... Front wheel
20 ... rear wheel 40 ... clutch 41 ... driveshaft
41a ... fixed bearing 41b ... bore 42 ... drive plate
43 ... driven shaft 43a ... spline gear 44 ... driven plate
44a ... through hole 44b ... protrusion 44c ... fitting groove
45 ... moving plate 46 ... fixing pin 47 ... cover
48 ... cylinder 49 ... chaingear 49a ... chain
50 ... Controller 51 ... Instrument cluster 52 ... Power switch
53 ... clutch control switch 54 ... variable resistance switch 55 ... lever
60 ... shaft

Claims (3)

A DC motor 12 which receives power from the battery 11 mounted to the main body 10;
A worm reducer 13 to which a rotating shaft (not shown) of the DC motor 12 is connected;
A clutch 40 for controlling the rotational force of the drive shaft 41 of the worm reducer 13 to the wheel 30;
A shaft 60 formed below the main body 10 and having wheels 30 formed on both sides thereof;
A pair of chain gear 49 and chain 49a connecting the shaft 60 and the driven shaft 43 of the clutch 40;
And a controller (50) for controlling the power supply and rotation speed to the DC motor (12) and adjusting the clutch (40).
The method of claim 1,
The clutch 40 includes a driving plate 42 having a central portion at one side thereof connected to the drive shaft 41 to form a fixed bearing 41a at the central portion at the other side thereof, and having a plurality of holes 41b at its outer circumferential surface;
It has a pair of wedge-shaped projections 44b fitted into the holes 41b and is inserted into the spline gear 43a of the driven shaft 43 in the through hole 44a at the center thereof so as to be movable left and right. A driven plate 44 having an annular fitting groove 44c formed integrally therewith;
A cylinder 48 having one side fixed to the body 10 is formed and the other side is inserted into the fitting groove 44c of the driven plate 44 to move the driven plate 44 back and forth by the operation of the cylinder 48. Plate 45; road cutter having an automatic driving function, characterized in that consisting of.
The method of claim 1,
The controller 50 includes a power switch 52;
An instrument panel 51 showing a resistance value generated between the cutting surface and the cutting blade;
A clutch control switch 53 for controlling the operation of the clutch 40 in which power of the DC motor 12 is transmitted to the wheel;
A variable resistance switch 54 connected to the DC motor 12 to control the forward speed of the wheel;
A lever 55 for setting forward and stop of the body 10;
If the resistance value of the instrument panel 51 exceeds the allowable range, after stopping the body to advance at intervals of 1 to 2 seconds to check the resistance value changes, and after the resistance generation factors are resolved to advance the microcomputer (not shown); including Road cutter with automatic driving function characterized in that configured.

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