JPS6294280A - Drill device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a drilling device that is applied to hydraulic and pneumatic drills as well as percussion drills.

Conventional technology The functions of conventional percussion drills are (1) The rock is crushed by the striking force of the piston.

(2) Change the contact surface between pit 1 and rock 3 by static rotation.

(3) Maintain contact between pit 1 and rock 3 by pressing force.

(4) Discharge the milled flour with air or water.

In the conventional crushing state, impact force F in the rod axial direction is applied to pit 1.
a acts to crush the rock 2 (see Figure 11).

Problems to be Solved by the Invention Through extensive research by the present applicant, it has been found that rock 3 has good crushing efficiency when struck at an angle with the same striking energy.

In other words, at the optimal inclination angle (θ""IQ'>, the crushing efficiency (/impact energy) is 5 compared to the conventional crushing amount (θ"-01).
0-100 improvement (see Figure 12).

However, it was impossible to perform a tilted blow inside the hole.

The present invention was made in view of the above circumstances, and its object is to provide a longitudinal elastic wave V to a rod.

A vector resultant force of the impact force and torque is generated in the pit by applying the impact force and torque of the shear wave Efx Ic L, and the inclined impact force caused by this vector resultant force produces the effect of an inclined impact, and the inclined impact in the hole is The objective is to improve the drilling speed and the drilling efficiency with the same energy.

Means and Function for Solving the Problems In order to achieve the above object, the present invention provides a rod 5iC having a pit 4 at its tip, a striking force applying means for applying a striking force by a longitudinal elastic wave VP, and 5 and a torque applying means for applying a torque by a shear plate V8, and the impact force applying means applies an impact force due to a longitudinal elastic wave pK to the rod 5, and the torque applying means applies a shear +9I to the rod 5. Torque is applied by the wave VS, and a tilted impact is generated in the pit 4 by the vector resultant force of impact force and torque.

Example The following five embodiments of the present invention will be explained based on the drawings.

To enable oblique impact in the hole, the impact force F of the longitudinal elastic wave P is applied as shown in FIG. and the shear wave V8 causes a drag force Fi
It is sufficient to generate the vector resultant force &. 4 is pit, 5
is a rod. The shear wave S propagates by generating an impulse torque.

Therefore, as shown in FIG. 2, the drill device according to the present invention includes a piston 6, an impact torque generating device 7, and a rod 5 connected to the output side of the impact torque generating device 7.
a rotation imparting mechanism 8 for imparting rotation to the rod 5;
It consists of a pit 4 provided at the tip of the rod 5 and Lr).

The rotation imparting mechanism 8 includes a low speed motor 9, a pinion gear 10, and a gear 11 that meshes with the pinion gear 10 and is provided on the rod 5.

Therefore, the piston 6 is moved up and down, and the impact torque generator ji7 is also activated.

The vertical elasticity e is applied to the rod 5 by the vertical drawing of the piston 6.
Vp is generated, and a shear wave is also generated in the rod 5 by the operation of the impact torque generator 7. At the tip of the pit 4, the longitudinal elastic wave 〆P and the S shear wave 〆8 are superimposed, and the vector combination of the longitudinal elastic wave VP and the shear wave 〆8 becomes a gray wave V.
The force exerted by the vector combination wave VR generated by P becomes an inclined impact force and crushes the rock 3.

The low-speed motor 9 of the rotation imparting device $8 operates to valve the pinion gear 10 and gear 11 to rotate the rod 5 [the 9th plane of 7 bits Δ is changed].

What is shown in FIGS. 5 and 6 is a one-width actual elliptical example of the present invention, which is equipped with a device body 12, and a cylinder 13 is formed in this device body I2.
3 is formed with a partition wall 14, and an upper fitting hole 15 is provided at the upper end of the cylinder 13, and a lower fitting hole 16 is provided at the lower end of the cylinder 13. A piston 17 is fitted into the cylinder 13 in sliding contact with the inner circumferential surface of the space I14, and the piston 17 divides the inside of the cylinder 13 into an upper chamber I8 and a lower chamber 19. The upper part of the piston 17 is inserted into the upper fitting hole 15.
The lower part of the piston 7 is fitted into the lower fitting holes 16 &c, respectively, and the upper part of the piston 17 is formed with a spline hole 20.

A high-speed motor 21 for impact torque is provided at the upper end of the device main body 12, and an output shaft 22 of this high-speed motor 21
A spline portion 23 is provided in the spline portion 2.
3 is inserted into the spline hole 20.

At the bottom of the device main body 12, there is a hole 2 that opens into the lower insertion hole 16.
A gear 25 is rotatably provided in the hole 24, and a spline hole 26 is formed in the gear 25, and the spline portion 27 of the rod 5 slides into the knob line hole 26. They are mated. Further, the main body 12 of the apparatus is provided with a low-speed motor 28, and a pinion gear 29 of the motor 28 meshes with the gear 25.

Friction plates 30 and 31 are attached to the lower end surface of the piston 17 and the upper end surface of the rod 5, respectively. A pit 4 is provided at the tip of the rod 5.

Fluid is supplied and discharged to the upper and lower chambers 18 and 19 of the cylinder 13, and this fluid is supplied and discharged through a valve 32.
This is done by switching. Therefore, by driving the high speed motor 21, the piston 17 is rotated, and fluid is alternately supplied and discharged from the upper and lower chambers 18 and 19 by switching the pulp 32, thereby moving the pinuto/17 up and down. This lowering of the piston 17 strikes the rod 5 and applies torque to the rod 5 via both friction plates 30, 31. That is, the impact force by the bullet e Vp and the torque by the shear wave VP are applied, and the rock 3 is crushed by the combined force of these forces.

Motor 28: pinion gear 29% gear 25
valve to rotate the rod 5 and change the surface that the pit 4 touches.

S'S)k/combined piston, i.e. the piston 17
and rod 5 are impedance matched 1
．． When detecting elastic waves, ifJ]tp and! @Dankamochi time t8
Both are short, and if the piston length is t, then the rod length L>
3. +bt, considering the piston length L-603 group, the rod length is L-3.16L-1.9m, which is considerably shorter than the standard rod (3,057JL).

That is, there is a problem in that the effect of the impact torque combined drill cannot be exhibited when drilling long holes.

When the piston 17 and the rod 5 are impedance matched (AI Pg ``l-Ath C''t) L, the longitudinal elastic waveform is a rectangular wave as shown in FIG.

Here, the duration of the longitudinal elastic wave VP is generally determined by the piston length t, so if t is increased, the duration becomes longer, but this leads to an increase in the size of the drill body, which is not practical.

L where the impedance of the piston is greater than that of rod 5
When 't plC+ > At pt Ct ), the longitudinal elastic waveform is a staircase wave as shown in FIG.

For these reasons, even if the piston length t is the same, if a piston 17 with a large impedance is used, the longitudinal elastic wave 〆P
It can be seen that the duration of

For example, if the duration is doubled, the longitudinal elastic wave VP
The maximum rod length Lmax at which the shear wave 4 overlaps is Lmaxm 3, based on the piston length t-603m.
16 x L x 2 * 4. g m, which is sufficiently long compared to the standard rod length (3.05 fi).

That is, by using the piston 17 with a large impedance, the effect of a piston with impact torque can be obtained by drilling a long hole without making the piston 17 long.

Balanced torque with impedance matching.

FIG. 9 shows the waveform at the tip of the pit 4 when the piston is used, and FIG. 10 shows the waveform when the piston with impact torque is used, which only has a large impedance.

Here, the piston length is 603 m & the rod length is 3rrL.

In Fig. 9, it is clear that the longitudinal elastic wave 〆P is at the tip of pit 4.
and the shear wave VP is negligible.

In Fig. 1O, when a piston with large impedance @striking torque is used, longitudinal elastic waves VP and shear waves rs
has a step-like waveform, and since Ijl (substantially during sustained barking) is extended, it is possible to superimpose the longitudinal elastic wave P and the shear wave V8 at the tip of the pit 4.

Effects of the Invention As detailed above, the drill device according to the present invention includes a striking force applying means for applying a striking force by a longitudinal elastic wave VP to a rod 5 having a pit 4 at the tip thereof, and a shear wave r to the rod 5.
The present invention is characterized in that it includes a torque applying means for applying a torque according to No. 8.

Therefore, the striking force applying means applies a striking force due to the longitudinal elastic wave VP to the rod 5, and the torque applying means applies a torque due to the shear wave VS to the rod 5, thereby generating a vector resultant force of the striking force and torque in the pit 4. can be done.

For this reason, an inclined impact force is generated by this vector resultant force, and the effect of the inclined impact increases the drilling speed and improves the drilling efficiency with the same energy. Further, according to the inclined impact, the contact area between the rock and the pit tip increases in the direction of the impact force, so the surface pressure of the pit 4 is reduced, and the amount of wear is reduced, that is, the life of the pit can be extended.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the acting force at the tip of the pit, FIG. 2 is a perspective view showing an example of the present invention, and FIG. An explanatory view of the base, FIG. 4 is an enlarged view of the section ■ in FIG. 3, FIG. 5 is an in-plane view of R1 of another leprosy example of the present invention, and FIG.
Fig. 7 is an explanatory diagram of the longitudinal elastic waveform in the case of impedance matching, Fig. 8 is an explanatory diagram of the longitudinal elastic waveform when the impedance of the piston is large, and Fig. 9 is an explanatory diagram of the piston with impact torque in impedance matching. 10th
Figure 11 is an explanatory diagram of waveforms caused by a piston with a combination of value and torque when the impedance of the piston is large, Figure 11 is an explanatory diagram of rock crushing by a conventional device, and Figure 120 is an explanatory diagram of rock crushing by an inclined hammer. 4 is the pit, 5 is the rod. Figure 2 Figure 3 P: Kodo c-vp

Claims (1)

[Claims] A drill characterized in that it is equipped with a striking force applying means for applying a striking force by a longitudinal elastic wave V_P to a rod 5 having a pit 4 at its tip, and a torque applying means to apply a torque to the rod 5 by a shear wave V_S. Device.