CN211666655U - Novel drill bit and drill rod combination - Google Patents

Abstract

The utility model relates to a novel drill bit and drill rod combination, which comprises a drill bit, a drill rod, a drain hole and a spherical tooth, wherein the drain hole and the spherical tooth are arranged on a cutting table of the drill bit; the bottom end of the cylindrical drill bit is provided with a clamping mounting hole; it is provided with the horizontally ring channel on the tight mounting hole inner wall to press from both sides, be provided with the tight piece of 4 arcs clamp in the ring channel, press from both sides tight mounting hole of tight piece arcwall orientation, it passes through its seesaw of drive screw drive, drive screw pass through the bearing install in on the ring channel inner wall of mounting groove, it keeps away from it link up to press from both sides tight piece one end in the ring channel inner wall extends to the screw rod mounting hole of bore bit outer wall, compare with prior art's simple threaded connection, the utility model provides a novel connect the locking mode can prevent effectively that bore bit and drill rod are connected the position and are not hard up.

Description

A new type of drill bit and drill rod combination

technical field

The utility model relates to the field of drill bits and drill rods for drilling.

Background technique

The drill bit is the part of the rock drilling tool that directly drills the rock. It is installed at the front end of the drill rod and performs rock hole drilling in the way of rotary impact. Ball tooth drill bit. In the prior art, the drill bit and the drill rod are connected by a simple thread. During high-speed rotation, the impact in the opposite direction may cause loosening of the threaded connection, causing the drill bit to fall off and sink into the rock.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a novel drill bit and drill rod combination.

The technical scheme provided by the utility model is as follows: a novel drill bit and drill rod combination, including a drill bit, a drill rod, and a drainage hole and a ball tooth arranged on a cutting table of the drill bit; the cylindrical The bottom end of the drill bit is provided with a clamping installation hole; the inner wall of the clamping installation hole is provided with a horizontal annular groove, and four arc-shaped clamping blocks are arranged in the annular groove, and the arc-shaped surface of the clamping block faces The clamping mounting hole is driven to move back and forth by a drive screw, the drive screw is mounted on the inner wall of the annular groove of the installation groove through a bearing, and its end away from the clamping block penetrates through the inner wall of the annular groove and extends to the drill bit inside the screw mounting hole of the outer wall.

Preferably, the side wall of the drill rod is provided with four escape grooves corresponding to the arc-shaped clamping block, and the shape of the escape grooves is the same as the shape of the arc-shaped clamping block.

Preferably, a positioning block is provided on the top surface of the inner wall of the clamping installation hole, and a positioning hole is correspondingly provided on the upper end surface of the drill rod.

Preferably, the cutting table is arranged on the upper end face of the drill bit, the cutting head is of a cross-shaped structure, and the upper end face of the cutting head is provided with a plurality of ball tooth mounting holes, and the ball tooth mounting holes are provided with threads.

Preferably, the bottom surface of the ball tooth is connected with a threaded shaft, and the ball tooth is installed in the ball tooth installation hole through the threaded shaft.

Preferably, a strong magnetic attraction is provided at the bottom of the ball tooth mounting hole.

Preferably, the ball teeth are made of cemented carbide.

The novel drill bit and drill rod combination provided by the utility model has the advantages of simple structure and convenient installation. Compared with the drill bit and the drill rod in the prior art, the drill bit and the drill rod are connected by simple threads. The locking method can effectively prevent the loosening of the connection between the drill bit and the drill rod due to the force rotation of the drill bit.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Figure 1 is a structural diagram of a new type of composite drill bit provided by the present utility model.

Figure 2 is a cross-sectional view of a new type of composite drill bit provided by the present invention.

Figure 3 is a bottom view of a new type of composite drill bit provided by the present invention.

Fig. 4 is the installation diagram of the drill bit and the drill rod of a new type of composite drill bit provided by the present utility model.

Description of drawings: 1-bit, 2-cutting table, 3-ball tooth, 4-drainage hole, 5-clamping mounting hole, 6-positioning block, 7-ring groove, 8-clamping block, 9-transmission Screw, 10-bearing, 11-positioning hole, 12-avoidance groove, 13-drill rod, 14-ball tooth mounting hole, 15-screw mounting hole.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, but not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation to the present invention; the terms "first", "second" and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance; in addition, Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Please refer to FIG. 1 to FIG. 4 , a new type of drill bit and drill rod assembly includes a drill bit 1, a drill rod 13, a drainage hole 4 and a ball tooth 3 provided on the cutting table 2 of the drill bit 1; the The bottom end of the cylindrical drill bit 1 is provided with a clamping installation hole 5; the inner wall of the clamping installation hole 5 is provided with a horizontal annular groove 7, and four arc-shaped clamping blocks are arranged in the annular groove 7 8. The arc-shaped surface of the clamping block 8 faces the clamping mounting hole 5 , which is driven to move forward and backward by the drive screw 9 , and the drive screw 9 is installed on the inner wall of the annular groove 7 of the clamping mounting hole 5 through the bearing 10 . On the upper side, one end away from the clamping block 8 extends through the inner wall of the annular groove 7 and extends into the screw mounting hole 15 of the outer wall of the drill bit 1 .

Preferably, four escape grooves 12 are provided on the side wall of the drill rod 13 corresponding to the arc-shaped clamping block, and the shape of the escape grooves 12 is the same as that of the arc-shaped clamping block.

When the drill rod 13 is inserted into the clamping mounting hole 5 of the drill bit 1 , the drive screw 9 is rotated with a screw to make the clamping block 8 advance into the avoidance groove 12 on the side wall of the drill rod 13 . Inside, the clamping of the drill rod 13 is realized and the rotation of the drill rod 13 is prevented. Compared with the simple screw connection in the prior art, the loosening of the drill rod 13 can be effectively prevented.

Preferably, a positioning block 6 is provided on the top surface of the inner wall of the clamping installation hole 5 , and a positioning hole 11 is correspondingly provided on the upper end surface of the drill rod 13 .

The positioning hole 11 facilitates the installation of the drill rod 13 and the drill bit 1 , so that the clamping block 8 is aligned with the escape groove 12 .

Preferably, the cutting table 2 is arranged on the upper end face of the drill bit 1 , the cutting head has a cross-shaped structure, and the upper end face of the cutting head is provided with a plurality of spherical tooth mounting holes 14 , and the spherical tooth mounting holes 14 are provided with thread.

Preferably, the bottom surface of the ball tooth 3 is connected with a threaded shaft, and the ball tooth 3 is installed in the ball tooth installation hole 14 through the threaded shaft.

When the ball teeth 3 are worn out, a single ball tooth 3 can be directly replaced, so as to avoid the whole drill bit 1 being discarded.

Preferably, the bottom of the ball tooth installation hole 14 is provided with a strong magnetic attraction, which facilitates the installation of the ball tooth 3 .

Preferably, the ball teeth 3 are made of cemented carbide.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included within the scope of patent protection of the present invention.

Claims (7)

1. A novel drill bit and drill rod combination comprises a drill bit, a drill rod, a drain hole and a spherical tooth, wherein the drain hole and the spherical tooth are arranged on a cutting table of the drill bit; the drill bit is characterized in that a clamping mounting hole is formed in the bottom end of the cylindrical drill bit; the drill bit is characterized in that a horizontal annular groove is formed in the inner wall of the clamping mounting hole, 4 arc-shaped clamping blocks are arranged in the annular groove, the arc-shaped surfaces of the clamping blocks face the clamping mounting hole and are driven to move back and forth through a transmission screw rod, the transmission screw rod is mounted on the inner wall of the annular groove of the mounting groove through a bearing, and one end of the transmission screw rod, which is far away from the clamping blocks, penetrates through the inner wall of the annular groove and extends into a screw rod mounting hole in the.

2. The novel drill bit and drill rod combination as claimed in claim 1, wherein the side wall of the drill rod is provided with 4 avoiding grooves corresponding to the arc-shaped clamping blocks, and the shape of the avoiding grooves is the same as that of the arc-shaped clamping blocks.

3. The novel drill bit and drill rod combination as claimed in claim 1, wherein the top surface of the inner wall of the clamping and mounting hole is provided with a positioning block, and the upper end surface of the drill rod is correspondingly provided with a positioning hole.

4. The novel drill bit and drill rod combination as claimed in claim 1, wherein the cutting table is disposed on the upper end surface of the drill bit, the cutting head has a cross-shaped structure, the upper end surface of the cutting head is provided with a plurality of ball tooth mounting holes, and the ball tooth mounting holes are provided with threads.

5. The novel bit shank assembly of claim 4, wherein a threaded shaft is connected to a bottom surface of the button, and the button is mounted in the button mounting hole through the threaded shaft.

6. The novel bit shank combination of claim 4, wherein the bottom of the button mounting hole is provided with a strong magnetic attraction.

7. The novel bit shank combination of claim 1, wherein the button is made of cemented carbide.

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