KR200260501Y1 - core-drilling machine - Google Patents

Abstract

The present invention relates to a core drill, and more specifically, to two clutch disks 14, a clutch gear 12 positioned between them, and a plurality of leaf springs 18 holding the clutch disk 14. A clutch member 16 fitted to the rear end of the vibration shaft 2; A first gear member 4 and a second gear member 6 which provide a striking force when rotating in the forward direction by applying the principle of a ratchet gear while being fitted to the oscillation shaft 2; The coupling hole 43 is formed in the center and the spring 24 is coupled to the rear portion, and a predetermined step 82 is protruded from the left and right sides of the front to form the coupling groove 81, and the stopper 85 is symmetrically formed on the outer circumferential surface thereof. A switching member 8 coupled to the front of the vibrating shaft 2 so as to selectively adjust the rotation or vibration state when the core drill is operated; A fixing member 10 formed at a left and right side so as to be fitted into the coupling groove 81 of the switching member 8 and fixedly coupled to the foremost end of the vibration shaft 2; The clutch member 16 and the first gear member 4, the second gear member 6, the switching member 8, the fixed member 10 and a plurality of bearings 20 and the washer 18 is coupled Vibrating body (D) consisting of a vibration shaft (2) of length; is installed in the front cover 22 and the main body 40 of the core drill (A), to increase the drilling capacity to facilitate the drilling work It can reduce the worker's fatigue and reduce the rotating load generated by sudden stop of the core drill bit during the drilling work, thus protecting the electric motor and extending the service life.

Description

Core drill {core-drilling machine}

The present invention relates to a dry core drill, and more particularly, to increase the drilling capacity by mounting a vibrating body capable of selectively parallel with the rotational force of the core drill rotary shaft and the impact force caused by vibration to improve the efficiency of drilling work The present invention relates to a core drill equipped with a clutch member capable of reducing the rotational load generated while the rotating shaft is suddenly stopped by a foreign material during a drilling operation, thereby preventing damage to the electric motor.

In general, a core drill is used to form a predetermined through hole for a perforated object such as a cement or concrete structure, an electric motor installed in the drill body, a reducer connected to the shaft of the electric motor, and connected to the reducer. The rotating shaft and the cylindrical bit coupled to the front of the rotating shaft are conventional structures.

When the above-described conventional core drill is carried out on the punched object such as stone and concrete structure, the bit of the bit rotated at high speed is drilled by frictional contact with the punched object, which is simply the rotational force of the core drill. Because only the perforated material with strong strength, such as mortar concrete or reinforced concrete, there was a problem that the work efficiency is reduced because the time to be drilled takes a long time and the physical fatigue of the worker increases.

In addition, if the rotation is suddenly stopped because the bit is caught in the reinforcing bars mixed in the drilling object during the drilling operation, there is a problem that the life of the electric motor is shortened due to excessive rotational load on the electric motor.

The present invention is devised to solve the above problems of the prior art, by mounting a vibrating body having a relatively simple structure that can convert the rotational force of the core drill rotary shaft into a striking force to increase the punching capacity by allowing the rotational force and the striking force in parallel It is an object of the present invention to provide a core drill equipped with a clutch member that facilitates the drilling operation and reduces the rotational load generated while the core drill bit stops suddenly during the drilling operation to protect the electric motor.

The above object is composed of two clutch clutch gear, a clutch gear positioned between the clutch member and a plurality of leaf springs which support the clutch clutch gear to be fitted to the rear end of the vibration shaft; A first gear member and a second gear member which provide a striking force when rotating in the forward direction by applying the principle of a ratchet gear while being fitted to the vibration shaft; A coupling hole is formed in the center, and a spring is coupled to the rear portion, and a predetermined step is formed on the front side to form a coupling groove. A switching member for selectively adjusting the state; A fixing member formed on a left and right side so as to be fitted into the coupling groove of the switching member, the fixing member being coupled to the foremost end of the vibration shaft; Vibrating body of the clutch member and the first gear member, the second gear member, the switching member, the fixed member and a plurality of bearings and washers coupled to a predetermined length; It is achieved by providing a core drill characterized in that.

1 is an exploded perspective view showing the structure of the vibrating body (D) and the clutch member 16 of the present invention

2a and 2b is a schematic cross-sectional view showing the operating state of the vibrating body of the present invention

3 is a perspective view showing a state of use of the subject innovation

Explanation of symbols on the main parts of the drawings

2: vibrating shaft 4: first gear member

6: second gear member 8: switching member

10: fixing member 12: clutch gear

14: clutch clutch gear 15: through hole

16: clutch member 18: washer

20: bearing 21: cutting surface

22: front cover 24: spring

13; Thread part 11: cut surface

41: numerical difference part 43,63,83: coupling hole

61: female part 81: coupling groove

82: stepped 85: stopper

40: main body A: core drill

B: Electric motor shaft C: Rotary shaft

D: vibrating body

The core drill 1 according to the present invention is composed of two clutch discs 14, a clutch gear 12 positioned between them, and a plurality of leaf springs 18 which support the clutch disc 14. A clutch member 16 fitted to the rear end of the oscillation shaft 2; A first gear member 4 and a second gear member 6 which provide a striking force when rotating in the forward direction by applying the principle of a ratchet gear while being fitted to the oscillation shaft 2; The coupling hole 43 is formed in the center and the spring 24 is coupled to the rear portion, and a predetermined step 82 is protruded from the left and right sides of the front to form the coupling groove 81, and the stopper 85 is symmetrically formed on the outer circumferential surface thereof. A switching member 8 coupled to the front of the vibrating shaft 2 so as to selectively adjust the rotation or vibration state when the core drill is operated; A fixing member 10 formed at a left and right side so as to be fitted into the coupling groove 81 of the switching member 8 and fixedly coupled to the foremost end of the vibration shaft 2; The clutch member 16 and the first gear member 4, the second gear member 6, the switching member 8, the fixed member 10 and a plurality of bearings 20 and the washer 18 is coupled Vibrating body (D) consisting of a vibration shaft (2) of length; is made to be installed in the front cover 22 and the main body 40 of the core drill (A).

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing the structure of the present invention and Figures 2a and 2b is a schematic cross-sectional view showing the operating state of the vibrating body of the present invention.

First, it will be described with reference to FIG. 1.

The clutch member 16 is composed of a plurality of clutch disks 14 fitted to the end of the electric motor shaft (B) and the clutch gear 12 located therebetween, the clutch disk 14 is elliptical in the center The through hole 15 is formed and the friction surface 17 is attached to the friction material to give a braking force on one surface, the clutch gear 12 has a groove portion 100 is inserted into the clutch disk 14 on both sides It is formed and a number of teeth formed on the outer circumference.

At this time, the clutch disk 14 is inserted into the recess 11 of the clutch gear 12 and is supported by the plurality of leaf springs 13 so that the friction surface 17 is in close contact with the side surface of the clutch gear 12. do.

That is, the role of the clutch member 16 is rotated while the rotary shaft (C) connected to the bit 102 is coupled to the front end of the vibration shaft (2) when the bit 102 is suddenly stopped by being caught in steel such as reinforcement While one side of the elliptical through hole of the clutch disc 14 is cut by the cutting surface 21 of the vibration shaft 2, the rotational load is reduced while the friction surface 17 of the clutch disc 14 is the clutch gear 12. ) By reducing the rotational load by the action of deceleration while friction contact with the motor to prevent breakage of the electric motor.

The first gear member 4 and the second gear member 6 are rotated in a forward direction by applying a ratchet gear. A plurality of teeth are formed on one surface of a disc shape, and a predetermined coupling is provided at a central portion thereof. Ball 43 is formed.

At this time, the coupling hole 43 of the first gear member 4 is slightly larger than the outer diameter of the vibration shaft 2 to allow the vibration shaft 2 to move back and forth by a predetermined length, and the second The gear member 6 is fixed after being fitted to the vibration shaft 2.

The vibrating shaft 2 is fitted with the first gear member 4 and the second gear member 6 inserted into the rear portion, and the switching member 8 and the fixing member 10 are fitted into the front portion, and the plurality of bearings are coupled. A predetermined cutting surface 21 is formed at the rear end by an axial rod having a predetermined length so that the 20 and the washer 18 are coupled to each other.

The switching member 8 has a predetermined size cylindrical shape, a predetermined coupling hole 43 is formed in the center and the spring 24 is coupled to the rear portion, and the predetermined step 82 is formed to protrude from the left and right sides of the front coupling groove. 81 is formed, and the stopper 85 is symmetrically installed on the outer circumferential surface, and is coupled to the front portion of the vibration shaft 2.

The fixing member 10 has a fitting portion having a cutting surface 11 at left and right sides to be fitted into the coupling groove 81 of the switching member 8, and a through hole 15 having a screw portion 13 is formed at the center thereof. It is coupled to the front end of the vibration shaft (2).

Looking at the operation of the present invention configured as described above are as follows.

The clutch member 16 and the first gear member 4, the second gear member 6, the switching member 8, the fixing member 10 and the plurality of bearings 20 and washers 18 are vibrating shafts ( 2) sequentially installed in the front cover 22 and the main body 40 of the core drill (A), and then rotating the switching member 8 as shown in Figure 2a to the coupling groove 81 By coupling the fixing member 10 to the bearing), a predetermined distance is formed between the bearing and the teeth of the first gear member 4 and the second gear member 6 may rotate alternately.

That is, in the above state, when the operator pushes the core drill against the workpiece to turn on the operation switch, the rotary shaft C of the drill is rotated in one direction and the ratchet gear principle is applied in the forward direction. When rotating, a plurality of teeth of the first gear member 4 and the second gear member 6 are alternately generated, so that a vibration force can be applied in parallel with the rotational force of the core drill.

In addition, in contrast to the above, when attempting a drilling operation by removing only the vibration force of the core drill and using only a simple rotational force, as shown in FIG. 2B, the coupling member 81 and the fixing member are rotated by rotating the switching member 8. When the fixing member 10 is spaced apart, the rear part of the switching member is closely contacted with the bearing, so that there is no separation space, even if the operator pushes the core drill to the workpiece, the teeth of the first gear member 4 and the second gear member 6 are fixed. (齒) does not touch, so the vibration effect is excluded and only a simple torque can be obtained.

Separately look at the action of the clutch member 16 as follows.

As shown in FIG. 1, the clutch member 16 has an elliptical through-hole in the center of the clutch disc 14 to be coupled to a predetermined cutting surface 21 formed at the rear end of the vibration shaft 2. 15) is formed, the friction surface 17 is attached to the friction material is provided on the surface in contact with the clutch gear 12 is applied to the braking force.

At this time, the reduction gear coupled to the shaft of the electric motor is coupled to the teeth (에) formed on the outer peripheral surface of the clutch member 16, the rotational force of the motor is transmitted to the clutch gear 12 to rotate the rotary shaft (C) of the core drill ) Is rotated.

However, when the core drill bit 102 is rotated and caught in steel such as reinforcing bars, the vibrating body D and the clutch member 16 are momentarily stopped. At this time, the electric motor and the reduction gear try to continue to rotate by inertia. As a result, an excessive load is applied to the electric motor, which may cause damage.

Therefore, even after the core drill bit 102 and the rotary shaft C are suddenly stopped as described above, the clutch gear 12 can be gradually decelerated under the rotational force applied by the electric motor.

That is, since a strong rotating load on the rotary shaft C of the core drill is transmitted to the vibrating shaft 2, one side of the through hole 15 of the clutch disc 14 is cut by the cutting surface 21 of the vibrating shaft 2. While reducing the rotational load while reducing the rotational load by the braking force in frictional contact with the friction surface 17 and the clutch gear 12 can protect the life of the electric motor.

Therefore, the present invention is equipped with a vibrating body that can selectively convert the rotational force of the core drill into the striking force to increase the drilling force by parallel to the rotational force to facilitate the drilling work, to reduce the fatigue of the operator In addition, it can protect the electric motor by reducing the rotational load generated when the core drill bit stops suddenly during the drilling operation.

As described above, the core drill equipped with the vibrating body and the clutch member according to the present invention is equipped with a vibrating body capable of selectively combining the striking force with the rotational force of the core drill, and abnormally rising suddenly generated during the drilling operation. It is equipped with a clutch member that reduces the rotating load by mixing the rotating load, and increases the drilling ability to facilitate the drilling work and reduce the fatigue of the operator, and suddenly drills the core drill bit during the drilling work. It is possible to protect the electric motor by reducing the rotational load generated while the stop is provided with a useful effect that can extend the service life.

Claims (1)

A clutch composed of two clutch disks 14, a clutch gear 12 positioned therebetween, and a plurality of leaf springs 18 which support the clutch disk 14, and are fitted to the rear end of the vibration shaft 2 Member 16; A first gear member 4 and a second gear member 6 which provide a striking force when rotating in the forward direction by applying the principle of a ratchet gear while being fitted to the oscillation shaft 2; The coupling hole 43 is formed in the center and the spring 24 is coupled to the rear portion, and a predetermined step 82 is protruded from the left and right sides of the front to form the coupling groove 81, and the stopper 85 is symmetrically formed on the outer circumferential surface thereof. A switching member 8 coupled to the front of the vibrating shaft 2 so as to selectively adjust the rotation or vibration state when the core drill is operated; A fixing member 10 formed at a left and right side so as to be fitted into the coupling groove 81 of the switching member 8 and fixedly coupled to the foremost end of the vibration shaft 2; The clutch member 16 and the first gear member 4, the second gear member 6, the switching member 8, the fixed member 10 and a plurality of bearings 20 and the washer 18 is coupled Vibrating body (D) consisting of a vibration shaft (2) of the length; core drill, characterized in that is made installed in the front cover 22 and the main body 40 of the core drill (A).