JPH04128110U - Quick return mechanism of automatic drilling machine - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to shorten the time required from when the quick return mechanism of an automatic drilling machine is set to the automatic feed state until the drill starts descending, and to reduce the number of parts of the quick return mechanism. shall be. [Structure] A feature is that an electromagnetic clutch 23 is adopted as a clutch for a quick return mechanism of a drilling machine. [Effect] According to the present invention, an electromagnetic clutch is used as the clutch for the fast return mechanism of a drilling machine, and the engagement of this clutch is electrically switched.When the electromagnetic clutch is energized, it instantly generates power. Because it is possible to convey
This reduces the engagement time of the clutch and, by extension, the time required from setting the quick-return mechanism of an automatic drilling machine to the automatic feed state until the drill starts descending, and reduces the number of parts of the quick-return mechanism, making it possible to reduce the cost of the entire mechanism. This type of machine tool with improved reliability can be obtained.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is an automatic system that automatically feeds and returns by changing the rotation direction of the feed motor. This relates to a quick return mechanism for a dynamic drilling machine.

0002

[Conventional technology]

The prior art will be explained with reference to FIGS. 4 to 8. As shown in Fig. 4, the movement of the feed motor 1 The force is from pinion 1a to first gear 2, worm 3, worm wheel 4, Transmitted to the handle shaft 8 via the high-speed specific reduction gear 5, clutch 6, and clutch 7 and move the drill up and down. The worm wheel 4 is connected to the input of the high-speed specific reduction gear 5. A one-way clutch 11 is fixed on the power side, and a one-way clutch 11 is mounted on the inner diameter of the worm wheel 4 for quick return. The handle shaft 8 spins idly during feeding, and the hand rotates when the quick return mechanism returns. It is attached so as to lock the shaft 8. The high-speed specific reduction gear 5 is Each element is arranged so that the force side and the output side rotate in the same direction. clutch 6 is fixed to the output side of the high-speed ratio reduction device 5. The retaining ring 10 is the stop of the clutch 7. Functions as a topper.

0003 As shown in FIG. 5, the high-speed specific speed reduction device 5 includes a component 5a, a component 5b, and a configuration Consisting of element 5c and component 5d, component 5d is input side and component 5b is output Become a side. A clutch 12 is fixed to the component 5a by bolts 18. . As shown in FIG. 7, the gear cover 17 includes a solenoid coil 22 and a plunger. The roller 13 is rotated by a roller 19, a spring 21, a fulcrum shaft 16, and a pin 14 at the end. A rotatably mounted stopper 15 is provided. Plunger 19 and stopper 15 is movably connected with a pin 20.

0004 During automatic feeding of the quick return mechanism, the solenoid coil 22 is opened by the control circuit, The plunger 19 is pushed upward by the force of the spring 21, and the fulcrum shaft 16 is Using the lever principle as a fulcrum, the roller 13 located at the end of the stopper 15 is clamped. The fulcrum shaft 16 is engaged with the tooth surface of the latch 12, and the fulcrum shaft 16 is abutted through the stopper 15. 12.

[0005] When the quick return mechanism automatically returns, close the solenoid coil 22 and release the plunger 19. It is sucked downward and pulls the clutch 12 and the roller 13 located at the end of the stopper 15. Release the clutch 12 so that it can rotate freely.

Next, the operation will be explained with reference to FIGS. 4 to 6. FIG. 5 shows the automatic feeding state of the fast return mechanism. During automatic feeding, the feed motor 1 rotates to the left, and the worm wheel 4 and high-speed ratio reduction device 5 rotate to the right via the first gear 2 and worm 3. During this automatic feeding, the solenoid coil 22 is opened by the control circuit, and the clutch 12 and the component 5a of the high-speed specific reduction gear device 5 are fixed by the stopper 15, so that the power of the worm wheel 4 is transferred to the high-speed specific reduction device 5, The signal is transmitted to the clutches 6 and 7, and the handle shaft 8 rotates clockwise at a rotation speed of Nin/i ³ . FIG. 6 shows the case of automatic return of the quick return mechanism. When the feed motor 1 is reversely rotated (clockwise) by the control circuit, the solenoid coil 22 is closed, the clutch 12 and the stopper 15 are disengaged, and the clutch 12 and the component 5a of the high-speed ratio reduction device 5 become rotatable. On the other hand, since the worm wheel 4 and the handle shaft 8 are locked by the one-way clutch 11, the power of the feed motor 1 is transmitted to the worm wheel 4 via the first gear 2 and the worm 3. The device 5, the clutch 6, the clutch 7, and the handle shaft 8 rotate simultaneously at the input rotation speed Nin.

[0007] Therefore, the rotation speed when the fast return mechanism returns is i3 times the speed of feed, and By controlling the rotation speed of the motor 1, the return speed can be increased.

[0008]

[Problem that the idea aims to solve]

However, the conventional quick return mechanism, as shown in FIG. Since the clutch 6 and clutch 7 are arranged in two places to transmit power, the clutch There are problems in that it takes time to fit together, increases drilling time, and reduces work efficiency. Ta. In addition, the number of parts for fixing and releasing the component 5a of the high-speed specific reduction gear device 5 is There was a problem in that the number of parts increased, and the reliability of normal operation became low.

[0009] The purpose of this invention is to improve the engagement time of the clutches at the two locations, and by extension The period from when the quick return mechanism is set to automatic feed until the drill starts descending. The object of the present invention is to provide a machine tool of this type with improved reliability in terms of time required.

0010

[Means to solve the problem]

The purpose is to provide the clutch 12, roller 13, pin 14, and slip shown in FIGS. 7 and 8. Topper 15, fulcrum shaft 16, plunger 19, pin 20, spring 21, solenoid An electromagnetic clutch is adopted as the clutch of the quick return mechanism consisting of the idle coil 22. This is achieved by electrically switching the engagement of the latch.

[0011]

[Effect]

According to the present invention having the above-mentioned configuration, the quick return mechanism of an automatic drilling machine can be adjusted automatically. When set to the dynamic feed state, the electromagnetic clutch 23 (refer to Figures 1 to 3 for reference numbers. The same applies hereinafter) ) is excited, and by fixing the component 5a of the high-speed specific reduction gear 5, the feed motor is activated. The power of the motor 1 is transmitted to the handle shaft 8 via the high-speed specific reduction gear 5, while , the electromagnetic clutch 23 is not energized during automatic return of the quick return mechanism, and the high-speed ratio reduction gear 5 is By making the component 5a rotatable, the power of the feed motor 1 is transferred to a high-speed specific reduction gear. Transmitted to the handle shaft 8 by the one-way clutch 11 without going through the gear 5 and operates to perform a quick return.

0012

【Example】

Hereinafter, the present invention will be explained in detail based on an embodiment of FIGS. 1 to 3.

[0013] As shown in FIG. 1, the power of the feed motor 1 is supplied from the pinion 1a as in the conventional First gear 2, worm 3, worm wheel 4, high-speed specific reduction gear 5, crank It is transmitted to the handle shaft 8 via the clutch 6 and the clutch 7, and controls the vertical movement of the drill. Let's do it. The worm wheel 4 is fixed to the input side of the high-speed specific reduction gear 5, and is connected to the worm wheel 4. A one-way clutch 11 is disposed on the inner diameter of the wheel 4, and a one-way clutch 11 is connected to the handle when the quick-return mechanism is sent. If the handle shaft 8 spins idly and the quick return mechanism returns, the handle shaft 8 will be locked. It is installed so that The high-speed specific reduction gear 5 has the same rotation speed on the input side and the output side. Each element is arranged in the direction of rotation.

[0014] As shown in FIGS. 2 and 3, the electromagnetic clutch 23 has an armature 23a and a rotor. 23b, the rotor 23b is fixed to the gear cover 17, and the armature 23a is fixed to the gear cover 17. is engaged with a component 5a of the high-speed specific reduction gear 5, and a component 5b is a clutch. 6 is engaged.

[0015] Next, the operation will be explained. FIG. 2 shows the automatic feeding state of the fast return mechanism.

[0016] During automatic feeding, feed motor 1 rotates counterclockwise and feeds via first gear 2 and worm 3. Then, the worm wheel 4 and the component 5d of the high-speed specific speed reduction device 5 rotate clockwise.

[0017] During this automatic feeding, the electromagnetic clutch 23 is energized by the control circuit, and the amateur Since the rotor 23a is attracted to the rotor 23b, the constituent elements of the high-speed specific reduction gear device 5 are The element 5a is fixed, and its rotation is transmitted to the handle shaft 8. rotates clockwise at a rotation speed of Nin/i3.

[0018] FIG. 3 shows the case of automatic return of the quick return mechanism.

[0019] When the control circuit reverses the feed motor 1 (clockwise rotation), the electromagnetic clutch 23 The armature 23a and the rotor 23b are not energized, and the structure of the high-speed specific reduction gear 5 is broken. The component 5a is rotatable, and no rotation is transmitted to the handle shaft 8. one On the other hand, the worm wheel 4 and the handle shaft 8 are connected by the one-way clutch 11. Because it is locked, the power of feed motor 1 is transferred to first gear 2, worm 3, and worm. The signal is transmitted to the handle shaft 8 via the arm wheel 4, and the handle shaft 8 Input rotation speed Rotate with Nin.

[0020]

[Effect of the idea]

The present invention is as described above, and according to the present invention, a clamp for a fast return mechanism of a drilling machine is provided. An electromagnetic clutch is adopted for the clutch, and the engagement of this clutch can be switched electrically. The electromagnetic clutch can instantly transmit power by energizing it. Therefore, the engagement time of the clutch and, in turn, the quick return mechanism of the automatic drilling machine can be automatically retracted. Reduces the time required from when the drill is set to the position until the drill starts descending. This type of machine tool reduces the number of parts in the return mechanism, making it inexpensive and increasing the reliability of the entire mechanism. can be obtained.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of an automatic drilling machine quick return mechanism according to the present invention.

FIG. 2 is an explanatory diagram of an automatic feeding state of the quick return mechanism shown in FIG. 1;

FIG. 3 is an explanatory diagram of the automatic return state of the quick return mechanism also shown in FIG. 1;

FIG. 4 is a vertical sectional side view showing the internal structure of a conventional automatic drilling machine quick return mechanism.

FIG. 5 is an explanatory diagram of the automatic feeding state of the quick return mechanism shown in FIG. 4;

6 is an explanatory diagram of the automatic return state of the quick return mechanism also shown in FIG. 4. FIG.

7 is an explanatory diagram of the operation of the clutch portion during automatic feeding of the quick return mechanism shown in FIG. 5; FIG.

8 is an explanatory diagram of the operation of the clutch portion when the quick return mechanism shown in FIG. 6 automatically returns; FIG.

[Explanation of symbols]

1 Feed motor 5 High-speed specific reduction gear 6 Clutch 7 Clutch 8 Handle shaft 11 One-way clutch 23 Electromagnetic clutch

Claims (1)

[Scope of utility model registration request] 1. An automatic drilling machine having a clutch portion that switches between automatic feed and manual feed of the drill by axial movement of a handle shaft, and a high speed ratio reduction device in the reduction portion, wherein an electromagnetic clutch is incorporated in the clutch portion, and the electromagnetic clutch is engaged with the high speed ratio reduction device, and when the quick return mechanism is automatically moved, the electromagnetic clutch is energized to fix the high speed ratio reduction device and transmit power, and when the quick return mechanism is automatically returned, the electromagnetic clutch is energized. A quick return mechanism for an automatic drilling machine, characterized in that by demagnetizing the electromagnetic clutch, a handle shaft is directly rotated from an input side gear of a high-speed ratio reduction device to perform a quick return.