Cutter for chamfering inner hole and two ends

Abstract

The utility model discloses a cutter for chamfering an inner hole and two ends, which comprises a cutter handle and a cutter head, the outer side of the cutter head is provided with a chip groove, the top end of the cutter head is fixedly provided with an annular plate, the annular plate is inserted in an annular groove, and the annular groove is arranged at the bottom end of the cutter handle. The screw rod rotates on the cutter handle, the screw rod can drive the extrusion block to move upwards, namely the extrusion block slides in the built-in groove, so that the extrusion block does not extrude the end part of the cylinder any more, and then the cylinder slides in the side hole and the through hole under the extrusion and pushing of the spring on the cylinder; the cylinder moves into the built-in groove, then the cutter handle and the cutter head can be separated, the cutter handle and the cutter head are arranged to be a single component to be combined and connected, when the cutter head needs to be scrapped, the cutter handle and the cutter head can be separated, and therefore the cutter head can be replaced independently, and resource waste and economic expenditure are effectively controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drill bit cutters, in particular to a cutter with an inner hole and chamfers at both ends. BACKGROUND

[0002] A drill bit (zuàntóu) is a cutting tool used by a general drill or a drilling machine to cut a circular hole. The basic principle of the drill bit is to rotate the cutting edge, cut the workpiece, and then remove the drillings through the drill groove.

[0003] Currently, drill bit cutters on the market are usually integrally cast and consist of two parts (a bit head and a bit shank). The bit head and the bit shank are used in cooperation. In actual use, once the bit head is damaged, the entire drill bit cutter will be directly scrapped by personnel. However, the bit shank part is intact, which undoubtedly causes waste of resources. To solve the above problems, a cutter with an inner hole and chamfers at both ends is proposed. SUMMARY

[0004] The utility model aims at providing a cutter with an inner hole and chamfers at both ends to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a cutter with an inner hole and chamfers at both ends, comprising a bit shank and a bit head, the outer side of the bit head is provided with a chip removal groove, the top end of the bit head is fixedly installed with an annular plate, the annular plate is inserted into the inside of an annular groove, the annular groove is opened on the bottom end of the bit shank, the outer side of the annular groove is provided with a perforation, a column body is inserted into the perforation, one end of the column body is in the inside of a side hole, the side hole is opened on the side wall of the annular groove, the inside of the side hole is provided with a spring, the outer side of the column body is in contact with an extrusion block, the extrusion block is inserted into an internal groove, the internal groove is opened in the bit shank, the top end of the extrusion block is rotationally connected with a screw rod, the screw rod is engaged in the inside of the bit shank through threads, and the inside of the internal groove is provided with a positioning mechanism.

[0006] As a further preferred embodiment of the present technical solution, one end of the spring is fixedly connected to the inner wall of the side hole, and the other end of the spring is in contact with the outer side of the column body.

[0007] As a further preferred embodiment of the present technical solution, the outer side of the annular plate is attached to the inner wall of the annular groove, and the outer side of the column body is attached to the inner wall of the perforation.

[0008] As a further preferred embodiment of the present technical solution, one end of the column body is provided with an arc-shaped edge, and the bottom end of the extrusion block is provided with an inclined edge.

[0009] As a further preferred embodiment of the present application, the extrusion block is attached to the inner wall of the built-in groove, and the thread on the outer side of the screw rod is a fine thread.

[0010] As a further preferred embodiment of the present application, the positioning mechanism comprises a fixed plate, which is fixedly arranged inside the built-in groove, and an opening slot is formed in the fixed plate and the column body, and a magnetic piece is fixedly arranged inside the opening slot.

[0011] As a further preferred embodiment of the present application, the fixed plates are equidistantly distributed inside the built-in groove, and the top end of the fixed plate abuts against the outer side of the extrusion block.

[0012] The utility model provides a tool of inner hole and two end chamfer, has the following beneficial effect:

[0013] The utility model discloses a tool of inner hole and two end chamfer, has the following beneficial effect:

[0014] The utility model discloses a tool of inner hole and two end chamfer, has the following beneficial effect: BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure front view schematic diagram of the utility model;

[0016] Figure 2 It is the structure front view schematic diagram of the utility model;

[0017] Figure 3 It is the structure front view schematic diagram of the utility model Figure 2 It is the structure front view schematic diagram of the utility model

[0018] Figure 4 It is the structure front view schematic diagram of the utility model

[0019] Figure 5 It is the structure front view schematic diagram of the utility model

[0020] In the figure: 1, handle; 2, tool bit; 3, chip flute; 4, annular plate; 5, annular groove; 6, perforation; 7, cylinder; 8, side hole; 9, spring; 10, extrusion block; 11, built-in slot; 12, screw rod; 13, positioning mechanism; 14, fixed plate; 15, open slot; 16, magnetic force sheet. 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.

[0022] The utility model provides technical schemes: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in this embodiment, a tool with an inner hole and chamfered ends, comprising a handle 1 and a tool head 2, the outer side of the tool head 2 is provided with a chip groove 3, the top end of the tool head 2 is fixedly installed with an annular plate 4, the annular plate 4 is inserted in the inside of an annular groove 5, the annular groove 5 is opened on the bottom end of the handle 1, the outside of the annular groove 5 is provided with a through hole 6, the through hole 6 is inserted with a cylinder 7, one end of the cylinder 7 is in the inside of a side hole 8, the side hole 8 is opened on the side wall of the annular groove 5, the inside of the side hole 8 is provided with a spring 9, the outside of the cylinder 7 is in contact with an extrusion block 10, the extrusion block 10 is inserted in the inside of an inner groove 11, the inner groove 11 is opened in the handle 1, the top end of the extrusion block 10 is rotatably connected with a screw rod 12, the screw rod 12 is threadedly engaged in the inside of the handle 1, the inside of the inner groove 11 is provided with a positioning mechanism 13, by rotating the screw rod 12 on the handle 1, the screw rod 12 can drive the extrusion block 10 to move upwards, that is, the extrusion block 10 slides in the inner groove 11, so that the extrusion block 10 no longer extrudes the end of the cylinder 7, and then the cylinder 7 is pushed by the spring 9 to slide in the inside of the side hole 8 and the through hole 6, the cylinder 7 moves to the inside of the inner groove 11, and then the handle 1 and the tool head 2 can be separated, by connecting the handle 1 and the tool head 2 as a single component, when the tool head 2 needs to be scrapped, the handle 1 and the tool head 2 can be separated, so that the tool head 2 can be replaced alone, effectively controlling the waste of resources and economic expenditure, one end of the spring 9 is fixedly connected to the inner wall of the side hole 8, the other end of the spring 9 is in contact with the outside of the cylinder 7, which can tension the position of the cylinder 7 and reset the cylinder 7, the outside of the annular plate 4 is attached to the inner wall of the annular groove 5, the outside of the cylinder 7 is attached to the inner wall of the through hole 6, which improves the connection sealing between the handle 1 and the tool head 2 to a certain extent, one end of the cylinder 7 is provided with an arc shape, the bottom end of the extrusion block 10 is provided with an inclined shape, so as to facilitate the extrusion and pushing of the extrusion block 10 on the outside of the cylinder 7, the outside of the extrusion block 10 is attached to the inner wall of the inner groove 11, the threads on the outside of the screw rod 12 are fine threads, which can have self-locking performance, further improving the stability during connection.

[0023] As Figure 3 and Figure 4As shown, the positioning mechanism 13 includes a fixed plate 14 fixedly arranged in the built-in groove 11, and the fixed plate 14 and the column 7 are both provided with an open slot 15, and the open slot 15 is fixedly provided with a magnetic sheet 16, the fixed plate 14 is distributed equidistantly in the built-in groove 11, and the top end of the fixed plate 14 abuts the outer side of the extrusion block 10, by arranging the positioning mechanism 13, when the shank 1 and the head 2 are separated, the spring 9 can push the column 7 to reset, so that the magnetic sheet 16 arranged on the column 7 and the fixed plate 14 can be tightly attached, thereby limiting the position of the column 7, so as to facilitate the subsequent connection work between the shank 1 and the head 2.

[0024] The utility model provides a kind of tool of inner hole and two end chamfer, specific working principle as follows:

[0025] In use, the screw rod 12 rotates in the interior of the shank 1, causing the screw rod 12 to move the extrusion block 10 upward, during which the extrusion block 10 slides in the built-in groove 11, and the extrusion block 10 no longer extrudes the end of the column 7. Then, under the action of the spring 9, the position of the column 7 can be pushed, causing the column 7 to disengage from the interior of the through hole 6 and the side hole 8. During this time, the fixed plate 14 and the column 7 can be tightly abutted together under the action of the magnetic sheet 16, thereby limiting the position of the column 7. Then, the shank 1 and the head 2 can be separated, and during this time, the annular plate 4 disengages from the interior of the annular groove 5. Thus, the head 2 can be replaced, and the chip groove 3 provided on the outer side of the head 2 can machine the inner hole and the chamfers on both ends together, reducing the machining time and the tool switching time, and improving the production efficiency.

[0026] Although embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A tool for machining an internal bore with chamfers on both ends, characterised in that: The utility model provides a cutting tool, including handle (1) and tool bit (2), the outside of tool bit (2) is provided with the chip flute (3), the top end of tool bit (2) is fixedly installed annular board (4), annular board (4) is inserted in the inside of annular groove (5), annular groove (5) is set up on the bottom end of handle (1), the outside of annular groove (5) is provided with perforation (6), the perforation (6) is inserted with cylinder (7), one end of cylinder (7) is in the inside of side hole (8), side hole (8) is set up on the lateral wall of annular groove (5), the inside of side hole (8) is provided with spring (9), the outside of cylinder (7) is in contact with extrusion block (10), extrusion block (10) is inserted in the inside of built-in groove (11), built-in groove (11) is set up in handle (1), the top end of extrusion block (10) is rotatably connected with screw rod (12), screw rod (12) is engaged in the inside of handle (1) through thread, the inside of built-in groove (11) is provided with positioning mechanism (13).

2. A tool for machining an internal bore with chamfers at both ends according to claim 1, characterized in that: One end of the spring (9) is fixedly connected to the inner wall of the side hole (8), and the other end of the spring (9) is in contact with the outer side of the cylinder (7).

3. The tool according to claim 1, wherein: The outer side of the annular plate (4) is attached to the inner wall of the annular groove (5), and the outer side of the cylinder (7) is attached to the inner wall of the perforation (6).

4. The tool according to claim 1, wherein: One end of the cylinder (7) is provided with an arc-shaped edge, and the bottom end of the extrusion block (10) is provided with an inclined edge.

5. The tool according to claim 1, wherein: The outer side of the extrusion block (10) is attached to the inner wall of the built-in groove (11), and the threads on the outer side of the screw rod (12) are fine threads.

6. The tool according to claim 1, wherein: The positioning mechanism (13) includes a fixed plate (14) fixedly arranged in the built-in groove (11), and an opening groove (15) is formed in the fixed plate (14) and the cylinder (7), and a magnetic sheet (16) is fixedly arranged in the opening groove (15).

7. A tool for machining an internal bore with chamfers at both ends according to claim 6, characterized in that: The fixed plate (14) is equally distributed in the built-in groove (11), and the top end of the fixed plate (14) is in contact with the outer side of the extrusion block (10).

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