CN213530896U

CN213530896U - Protective twist drill

Info

Publication number: CN213530896U
Application number: CN202021288206.6U
Authority: CN
Inventors: 阮志财; 包小强; 谭现国
Original assignee: Zhejiang Bailey Tools Co ltd
Current assignee: Zhejiang Bailey Tools Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-06-25
Anticipated expiration: 2030-07-01

Abstract

The application relates to a protective twist drill, which comprises a drill and a tool body arranged at one end of the drill; one end of the knife body is provided with a knife handle, and the knife body is detachably connected with an annular separation blade; the cutter body is provided with an annular positioning plate, one side of the positioning plate is provided with an annular bulge, the side face of the annular bulge is provided with threads, the inner ring of the separation blade is provided with internal threads, and the separation blade is connected to the cutter body through the internal threads and the annular bulge in a thread fit mode. The separation blade on the blade can block that the drilling produces the regional area that the smear metal splashes to operating personnel place, has avoided the smear metal to splash operating personnel, has improved the security of hand-held type electric drill, and the separation blade can be followed the dismantlement on the blade, when the boring cutter damaged, can be with on another intact boring cutter of separation blade pull-down mount pad, avoid extravagant. This application has the effect that improves the security performance of fluted drill.

Description

Protective twist drill

Technical Field

The application relates to the technical field of twist drills, in particular to a protective twist drill.

Background

Twist drills are tools for machining holes from solid materials, and are the most widely used tools among hole machining tools. Twist drills are tools that drill round holes in a workpiece by rotary cutting thereof about a fixed axis. The flute is spiral and shaped like twist. Spiral flutes can have two, three or more flutes, but two flutes are most common. Twist drills can be used clamped on hand-held drilling tools, both manual and electric, or drilling, milling, turning and even machining centers.

In view of the above-mentioned related art, the inventor has considered that there is a drawback that when the twist drill is used for an electric hand-held drilling tool, an operator is close to a working portion of the drill, chips generated when the drill is operated are scattered around, and the operator is easily injured.

SUMMERY OF THE UTILITY MODEL

In order to protect an operator from being splashed by chips, the application provides a protective twist drill.

The application provides a protection type twist drill adopts following technical scheme:

a protective twist drill comprises a drill bit and a bit body arranged at one end of the drill bit; one end of the knife body is provided with a knife handle, and the knife body is detachably connected with an annular separation blade.

Through adopting above-mentioned technical scheme, the separation blade on the blade can block that drilling produces the regional area that the smear metal splashes to operating personnel place, has avoided the smear metal to spatter operating personnel, has improved the security of hand-held type electric drill, and the separation blade can be followed the blade and dismantled, when the boring cutter damages, can be with on another intact boring cutter of separation blade pull-down mount pad, avoid extravagant.

Preferably, the tool holder is a regular quadrangular prism and is coaxial with the tool body, and the size of the outer ring of the tool holder is smaller than that of the outer ring of the tool body.

By adopting the technical scheme, the tool shank and the clamping part of the handheld electric drill are clamped through the four surfaces, so that the drill is firmly clamped by the handheld electric drill, and the safety of the handheld electric drill is improved.

Preferably, an annular positioning plate is arranged on the cutter body, an annular bulge is arranged on one side of the positioning plate, threads are arranged on the side face of the annular bulge, internal threads are arranged on the inner ring of the blocking piece, and the blocking piece is connected to the cutter body through the internal threads and the annular bulge in a thread fit mode.

By adopting the technical scheme, when in use, the baffle plate is arranged on the positioning plate; when the nut is not used, the blocking piece can be detached by detaching the nut.

Preferably, the rotation direction of the thread on the annular protrusion is opposite to the rotation direction of the drill bit during drilling.

Through adopting above-mentioned technical scheme, when the drill bit starts, because there is certain relative slip between inertia blade and the nut, the direction of rotation of screw thread is opposite with the direction of rotation when the brill sword was bored on the annular protrusion, can utilize this relative slip to make nut and annular protrusion complex inseparabler, at the drilling in-process, prevents the separation blade slippage.

Preferably, the axial length of the baffle is not greater than the axial length of the annular projection.

By adopting the technical scheme, the separation blade can be completely matched with the annular bulge through threads, and the safety of the separation blade is improved.

Preferably, the separation blade is circular, and the cover is established on the blade, one side that the separation blade is close to the handle of a knife is equipped with the fixed plate, the side threaded connection of fixed plate has set screw, set screw runs through the fixed plate butt on the blade.

Through adopting above-mentioned technical scheme, screw up set screw and just can fix the separation blade on the sword body, the operator can be according to the position of the degree of depth regulation separation blade of drilling, and is convenient nimble more.

Preferably, the baffle plate is annular, and the outer ring is provided with a flange bent towards the direction of the drill bit.

By adopting the technical scheme, the circular baffle plate has the largest area relative to other shapes with the same perimeter, and can have larger protection area under certain conditions.

Preferably, the shape of the baffle plate is a spherical surface shape with the edge of the baffle plate inclined towards the direction of the drill bit.

By adopting the technical scheme, the annular baffle plate of the spherical baffle plate arm has larger protection area under the condition of not influencing the drilling depth.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the blocking piece on the cutter body can block cuttings generated by drilling from splashing to the area where an operator is located, so that the operator is prevented from being splashed by the cuttings, the safety of the handheld electric drill is improved, the blocking piece can be detached from the cutter body, and when the drill is damaged, the blocking piece can be detached from another intact drill of the mounting base, so that waste is avoided;

2. when the drill bit is started, because the inertia cutter body and the baffle plate have certain relative sliding, the rotating direction of the thread on the annular bulge is opposite to the rotating direction of the drill bit during drilling, the nut and the annular bulge can be matched more tightly by utilizing the relative sliding, and the baffle plate is prevented from slipping in the drilling process;

3. the blocking piece can be fixed on the cutter body by screwing the positioning screw down, and an operator can adjust the position of the blocking piece according to the depth of the drilled hole, so that the cutter is more convenient and flexible.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present application.

Fig. 2 is an enlarged schematic view of the part a in fig. 1.

Fig. 3 is a schematic structural diagram of embodiment 2 of the present application.

Fig. 4 is an enlarged schematic view of the part B in fig. 3.

Fig. 5 is a schematic structural diagram of embodiment 3 of the present application.

Description of reference numerals: 1. drilling a cutter; 2. a blade body; 21. a knife handle; 22. a baffle plate; 221. a fixing plate; 222. a set screw; 23. positioning plate 231, annular protrusion.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

Example 1

The embodiment of the application discloses protection type fluted drill. Referring to fig. 1, a protective twist drill includes a drill bit 1 and a bit body 2 disposed at one end of the drill bit 1. Two spiral upward chip flutes are arranged on the drill bit 1. One end of the knife body 2 is provided with a knife handle 21, the knife handle 21 is a regular quadrangular prism, the knife handle 21 and the knife body 2 are coaxially arranged, and the size of the outer ring of the knife handle is smaller than that of the outer ring of the knife body 2. The tool shank 21 and the clamping part of the handheld electric drill are clamped through four surfaces, so that the drill bit 1 is firmly clamped by the handheld electric drill, and the safety of the handheld electric drill is improved.

Referring to fig. 2, a blocking plate 22 is sleeved on a cutter body 2, the blocking plate 22 is circular, a blocking edge bent towards the direction of the drill cutter 2 is arranged on the outer edge of the blocking plate 22, a fixing plate 221 is arranged on one side, close to the cutter handle 21, of the blocking plate 22, the blocking plate 22 and the fixing plate 221 are circular, a threaded hole is formed in the side surface of the fixing plate 221, and a positioning screw 222 is connected to the threaded hole in a threaded manner. A convex ring is arranged on the knife body 2, and the blocking piece 22 is abutted against one side of the convex ring close to the knife handle 21. In practical use, the blocking plate 22 can be adjusted to a proper position, the blocking plate 22 can be fixed on the cutter body 2 by screwing the positioning screw 222, an operator can adjust the position of the blocking plate 22 according to the depth of a drilled hole, and the operator can be protected to the greatest extent under the condition that the drilling work is not influenced.

Example 2

Referring to fig. 3 and 4, the present embodiment is different from embodiment 1 in that: be equipped with annular locating plate 23 on blade 2, be equipped with annular arch 231 in locating plate 23 one side near the handle of a knife, the side of annular arch 231 is equipped with the screw thread, and the cover is equipped with annular separation blade 22 on blade 2, and the inboard of separation blade 22 is equipped with the internal thread, and separation blade 22 internal thread and annular arch 231 screw-thread fit fix on blade 2. In actual use, the baffle 22 is first installed on the blade body 2, and then the drilling work is performed. The baffle 22 can block the chips flying to the operator, and the chips are prevented from sputtering the operator.

The rotation direction of the threads on the side surface of the annular protrusion 231 is opposite to the rotation direction of the drill 1, when the drill 1 is started, due to certain relative sliding between the inertia cutter body 2 and the nut 221, the rotation direction of the threads on the annular protrusion 231 is opposite to the rotation direction of the drill 1 during drilling, the blocking piece 22 can be matched with the annular protrusion 231 more tightly by utilizing the relative sliding, and the blocking piece 22 is prevented from slipping in the drilling process.

Example 3

Referring to fig. 5, the difference between this embodiment and embodiments 1 and 2 is that the shape of the fence 22 is a spherical shape with the edge inclined toward the drill 1. The spherical flap 22 has a larger protective area than the annular flap 22, and can protect the operator better.

The implementation principle of a protection type twist drill of the embodiment of the application is as follows: when the twist drill begins to drill, a large amount of cutting chips can be generated, the cutting chips can splash around under the action of centrifugal force along with the high-speed rotation of the twist drill, and operators are easily injured by mistake. On the premise of not influencing the normal use of the twist drill, the cutting scraps splashed to an operator are blocked by the blocking piece 22 arranged on the tool body 2, so that the safety of the handheld electric drill can be effectively improved.

Separation blade 22 on blade 2 can block that the drilling produces the regional area that the smear metal splashes to operating personnel place, has avoided the smear metal to splash operating personnel, has improved the security of hand-held type electric drill, and separation blade 22 can be followed and is dismantled on blade 2, when boring cutter 1 damages, can pull down separation blade 22 on another intact boring cutter 1 of mount pad, avoids extravagant.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A protection type twist drill is characterized in that: comprises a drill (1) and a cutter body (2) arranged at one end of the drill (1); the one end of blade (2) is equipped with handle of a knife (21), can dismantle on blade (2) and be connected with annular separation blade (22), be equipped with annular locating plate (23) on blade (2), one side that is close to handle of a knife (21) of locating plate (23) is equipped with annular arch (231), the side of annular arch (231) is equipped with the screw thread, separation blade (22) inner circle is equipped with the internal thread, separation blade (22) are connected on blade (2) through internal thread and annular arch (231) screw-thread fit, the direction of rotation of screw thread is opposite when boring sword (1) drilling on annular arch (231).

2. A protected twist drill according to claim 1, wherein: the tool holder (21) is a regular quadrangular prism and is coaxial with the tool body (2), and the size of the outer ring of the tool holder (21) is smaller than that of the outer ring of the tool body (2).

3. A protected twist drill according to claim 1, wherein: the axial length of the baffle plate (22) is not more than that of the annular bulge (231).

4. A protected twist drill according to claim 1, wherein: the knife is characterized in that the blocking piece (22) is annular and is sleeved on the knife body (2), a fixing plate (221) is arranged on one side, close to the knife handle (21), of the blocking piece (22), a positioning screw (222) is connected to the side face of the fixing plate (221) in a threaded mode, and the positioning screw (222) penetrates through the fixing plate (221) and abuts against the knife body (2).

5. A protected twist drill according to claim 1, wherein: the baffle plate (22) is annular, and the outer ring is provided with a flange bent towards the direction of the drill bit (1).