Replaceable twist drill bit structure

Abstract

The utility model belongs to the technical field of twist drills, particularly relates to a replaceable twist drill bit structure, and aims to solve the problem that drilling operation cannot be continued due to the fact that the tip end of a twist drill bit is greatly abraded in the drilling working process when a large amount of broken stone exists in an existing layer, and the following scheme is provided: the replaceable twist drill bit structure comprises a twist drill bit, a first bolt is installed on the outer wall of the spiral drill bit, a drilling mechanism used for assisting drilling is arranged on the lower surface of the spiral drill bit, and a quick dismounting mechanism used for dismounting the drill bit is arranged in the spiral drill bit. The drilling mechanism comprises an auxiliary drill bit, the auxiliary drill bit is arranged on the lower surface of the spiral drill bit, a chip groove is formed in the outer surface of the auxiliary drill bit, and a fixing bolt is installed on the outer wall of the auxiliary drill bit. According to the utility model, the fixing bolt is screwed off, so that the fixing bolt is separated from the fixing hole, and the fixation of the auxiliary drill bit is relieved, so that the auxiliary drill bit can be disassembled and assembled and can be conveniently and independently replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drill bit structure, concretely is a replaceable spiral drill bit structure and belongs to the spiral drill technical field. BACKGROUND

[0002] The spiral drill bit mainly consists of cutting tools, spiral blades, mandrel pipes, flanges and the like. The cutting tools are generally located on the upper part of the guide spiral blades and undertake the task of drilling into broken rocks and soil removal. The spiral blades have the functions of guiding and soil removal. In the drilling process, the electric motor drives the spiral drill rod through the speed reducer. The spiral drill rod is a cylindrical rod with spiral blades welded thereon, which is connected with a wing-shaped drill bit. Under the action of drilling pressure, the drill bit rotates and cuts into the stratum along a spiral line. The soil and debris cut and scraped are transported to the orifice along the spiral blades.

[0003] In the prior art, as disclosed in a long spiral drill bit structure with publication number CN218716557U, it includes a drill rod, the drill rod includes a hollow drill rod body, the outer periphery of the drill rod body is provided with spiral-shaped spiral blades, a plurality of tooth grooves are arranged on the spiral blades at intervals, and the lower end of the drill rod body is further connected with a drill bit. The drill bit includes a hollow drill bit body, and the outer circumference of the drill bit body is arranged with a cutting band distributed in a spiral manner. It is designed by the structure of the tooth groove of the spiral blade, so that the spiral blade not only plays the role of soil extrusion and soil removal, but also can cut the rock-soil body by using the tooth groove, thereby improving the drilling efficiency of the long spiral drill bit structure in the pebble stratum containing floating stones and the strongly weathered rock stratum.

[0004] In the above technical solution, the spiral blade is designed by the structure of the tooth groove, so that the spiral blade not only plays the role of soil extrusion and soil removal, but also can cut the rock-soil body by using the tooth groove. However, when there are many broken stones in the stratum, the tip of the spiral drill bit is greatly worn during the drilling process, which leads to the inability to continue the drilling operation. Therefore, a replaceable spiral drill bit structure is provided to overcome the above defects. UTILITY MODEL CONTENTS

[0005] The utility model provides a replaceable spiral drill bit structure to solve the problem that the tip of the spiral drill bit is greatly worn during the drilling process when there are many broken stones in the stratum, which leads to the inability to continue the drilling operation.

[0006] The utility model realizes the above-mentioned purpose by the following technical scheme: a replaceable spiral drill bit structure, including spiral drill bit, the outer wall of spiral drill bit is installed with first bolt, the lower surface of spiral drill bit is equipped with the drilling mechanism for assisting drilling, the inside of spiral drill bit is equipped with quick release mechanism for disassembling drill bit;

[0007] The drilling mechanism comprises an auxiliary drill bit, the auxiliary drill bit is arranged on the lower surface of the spiral drill bit, a chip removal groove is formed on the outer surface of the auxiliary drill bit, and a fixing bolt is arranged on the outer wall of the auxiliary drill bit.

[0008] As a further scheme of the utility model: the quick release mechanism comprises a driving shaft, the driving shaft is arranged in the spiral drill bit, and two fixed clamping strips are fixed on the outer surface of the driving shaft.

[0009] As a further scheme of the utility model: a connecting groove is formed in the spiral drill bit and movably connected with the driving shaft.

[0010] As a further scheme of the utility model: the outer wall of the two fixed clamping strips is connected with a fixed clamping groove formed in the inner wall of the spiral drill bit.

[0011] As a further scheme of the utility model: a limiting hole is formed on the outer surface of the driving shaft, and a second bolt is movably connected in the limiting hole and screwed with the spiral drill bit.

[0012] As a further scheme of the utility model: a spiral blade is fixed on the outer surface of the spiral drill bit, and a cutting mechanism for cutting is arranged at one end of the spiral blade.

[0013] As a further scheme of the utility model: the cutting mechanism comprises a cutting piece, the cutting piece is fixed at one end of the spiral blade, a cutting knife is fixed on one side of the cutting piece, and a residue removal groove is formed in the cutting knife.

[0014] The utility model discloses the beneficial effect is: through the fixed bolt is screwed down, makes fixed bolt and fixed hole separate, removes the fixing of auxiliary drill bit, and this can disassemble and assemble auxiliary drill bit, and the convenient individual replacement is replaced alone.

[0015] Through the first bolt and the second bolt on the spiral drill bit are screwed down, the first bolt and the limiting hole on the driving shaft are separated, the fixing of the driving shaft is removed, at the moment, under the cooperation of the connecting groove, the spiral drill bit can be taken off from the driving shaft, and then the spiral blade can be replaced alone. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the three-dimensional structure schematic diagram of the utility model;

[0017] Fig. 2 It is the three-dimensional structure schematic diagram of the spiral drill bit of the utility model;

[0018] Fig. 3 It is the cross section structure schematic diagram of the spiral drill bit of the utility model;

[0019] Fig. 4 It is a three-dimensional structure schematic view of the cutting member of the utility model.

[0020] In the figure: 1, spiral drill bit; 2, first bolt; 3, auxiliary drill bit; 31, chip removal groove; 32, fixing bolt; 33, fixing hole; 4, driving shaft; 41, fixed clamping strip; 42, connecting groove; 43, fixed clamping groove; 44, second bolt; 45, limiting hole; 5, spiral blade; 6, cutting member; 61, cutting tool; 62, slag removal groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model. Embodiment one

[0022] As Figs. 1 to 4 shown, a replaceable spiral drill bit structure, including spiral drill bit 1, the outer wall of spiral drill bit 1 is provided with first bolt 2, the lower surface of spiral drill bit 1 is provided with drilling mechanism for assisting drilling, the inside of spiral drill bit 1 is provided with quick-release mechanism for disassembling drill bit;

[0023] Drilling mechanism includes auxiliary drill bit 3, auxiliary drill bit 3 is arranged on the lower surface of spiral drill bit 1, the outer surface of auxiliary drill bit 3 is provided with chip removal groove 31, the outer wall of auxiliary drill bit 3 is provided with fixing bolt 32, the tail end of fixing bolt 32 is connected with fixing hole 33 arranged on spiral drill bit 1 by plug-in connection, quick-release mechanism includes driving shaft 4, driving shaft 4 is arranged in the inside of spiral drill bit 1, the outer surface of driving shaft 4 is fixed with two fixed clamping strips 41, the inside of spiral drill bit 1 is provided with connecting groove 42 movably connected with driving shaft 4, when spiral drill bit 1 rotates, it will drive auxiliary drill bit 3 to rotate, and then carry out auxiliary drilling, then spiral drill bit 1 carries out reaming, and the setting chip removal groove 31 facilitates the discharge of impurities, when auxiliary drill bit 3 is damaged, fixing bolt 32 can be unscrewed, so that fixing bolt 32 and fixing hole 33 are separated, the fixing of auxiliary drill bit 3 is released, so that auxiliary drill bit 3 can be disassembled and replaced separately. Embodiment two

[0024] The embodiment includes all the technical features in embodiment one, and further includes that the outer wall of the two fixed clamping strips 41 is insertedly connected with the fixed clamping groove 43 opened in the inner wall of the spiral drill bit 1, the outer surface of the driving shaft 4 is opened with the limiting hole 45, the inside of the limiting hole 45 is insertedly connected with the second bolt 44 which is screwed with the spiral drill bit 1, the outer surface of the spiral drill bit 1 is fixed with the spiral blade 5, one end of the spiral blade 5 is provided with the cutting mechanism for cutting, the cutting mechanism includes the cutting piece 6, the cutting piece 6 is fixed at one end of the spiral blade 5, the cutting knife 61 is fixed on one side of the cutting piece 6, the inside of the cutting knife 61 is opened with the residue discharge groove 62, by unscrewing the first bolt 2 and the second bolt 44 on the spiral drill bit 1, the first bolt 2 and the limiting hole 45 on the driving shaft 4 are separated, the fixing of the driving shaft 4 is released, at this time, under the cooperation of the connecting groove 42, the spiral drill bit 1 can be taken off from the driving shaft 4, and then the spiral blade 5 is conveniently replaced, and the driving shaft 4 can normally drive the spiral drill bit 1 to rotate by the mixed fixed clamping groove 43 of the fixed clamping strip 41, the hole expansion operation can be performed by the cutting piece 6 provided on the spiral blade 5 under the cooperation of the cutting knife 61 and the residue discharge groove 62, and the use is convenient.

[0025] Working principle: before using the replaceable spiral drill bit structure, the drill bit and the output shaft of the driving device are connected and fixed, the driving shaft 4 and the output end of the device are fixed, the device drives the driving shaft 4 to rotate, and then drives the spiral drill bit 1 to rotate, at the same time, the spiral drill bit 1 rotates to drive the auxiliary drill bit 3 to rotate, and then auxiliary drilling is performed, and then the spiral drill bit 1 expands the hole, and the residue discharge groove 31 is convenient for discharging impurities, when the auxiliary drill bit 3 is damaged, the fixing bolt 32 is unscrewed, the fixing bolt 32 and the fixing hole 33 are separated, and the fixing of the auxiliary drill bit 3 is released, so that the auxiliary drill bit 3 can be disassembled and replaced individually, by unscrewing the first bolt 2 and the second bolt 44 on the spiral drill bit 1, the first bolt 2 and the limiting hole 45 on the driving shaft 4 are separated, the fixing of the driving shaft 4 is released, at this time, under the cooperation of the connecting groove 42, the spiral drill bit 1 can be taken off from the driving shaft 4, and then the spiral blade 5 is conveniently replaced, and the driving shaft 4 can normally drive the spiral drill bit 1 to rotate by the mixed fixed clamping groove 43 of the fixed clamping strip 41, the hole expansion operation can be performed by the cutting piece 6 provided on the spiral blade 5 under the cooperation of the cutting knife 61 and the residue discharge groove 62, and the use is convenient.

[0026] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0027] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A replaceable auger drill bit structure, comprising an auger drill bit (1), characterized in that: A first bolt (2) is mounted on the outer wall of the spiral drill bit (1), a drilling mechanism for assisting drilling is provided on the lower surface of the spiral drill bit (1), and a quick-release mechanism for disassembling the drill bit is provided inside the spiral drill bit (1); The drilling mechanism comprises an auxiliary drill bit (3), the auxiliary drill bit (3) being arranged on the lower surface of the spiral drill bit (1), the outer surface of the auxiliary drill bit (3) being provided with a chip removal groove (31), the outer wall of the auxiliary drill bit (3) being provided with a fixing bolt (32), the end of the fixing bolt (32) being plug-connected with a fixing hole (33) provided on the spiral drill bit (1).

2. The replaceable auger drill bit structure according to claim 1, characterized in that: The quick-release mechanism comprises a drive shaft (4), the drive shaft (4) being arranged inside the spiral drill bit (1), and two fixing clips (41) being fixed to the outer surface of the drive shaft (4).

3. The replaceable auger drill bit structure according to claim 2, characterized in that: A connecting groove (42) movably connected to the drive shaft (4) is provided inside the spiral drill bit (1).

4. The replaceable auger drill bit structure according to claim 3, characterized in that: The outer walls of the two fixed clamping strips (41) are plug-connected with fixed clamping grooves (43) provided on the inner wall of the spiral drill bit (1).

5. The replaceable auger drill bit structure according to claim 4, characterized in that: A limiting hole (45) is provided on the outer surface of the driving shaft (4), and a second bolt (44) threadedly connected to the spiral drill bit (1) is plugged into the interior of the limiting hole (45).

6. The replaceable auger drill bit structure according to claim 1, characterized in that: A spiral blade (5) is fixed to the outer surface of the spiral drill bit (1), and a cutting mechanism for cutting is provided at one end of the spiral blade (5).

7. The replaceable auger drill bit structure according to claim 6, characterized in that: The cutting mechanism comprises a cutting member (6), the cutting member (6) being fixed to one end of the spiral blade (5), a cutting blade (61) being fixed to one side of the cutting member (6), and a slag discharge groove (62) being provided inside the cutting blade (61).

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