CN211661143U - Stable form drill bit convenient to change - Google Patents

Abstract

The utility model relates to a stable form drill bit convenient to change, including drill bit body, a centre gripping section of thick bamboo and installation piece, a centre gripping section of thick bamboo is hollow inverted circular truncated cone structure, the mounting hole has upwards been seted up to the diapire of installation piece, and the mounting hole is the blind hole, and a centre gripping section of thick bamboo is fixed on the diapire of installation piece and with the mounting hole intercommunication of installation piece, the upper portion of drill bit body by supreme centre gripping section of thick bamboo and the mounting hole of passing down, the lower part is equipped with first stop gear in the mounting hole, and middle part and upper portion are equipped with second stop gear and third stop gear respectively in the installation piece, open the coolant liquid flow path on the installation. The utility model discloses when using, it is convenient to dismantle and change the drill bit body, and the grip block can prevent not hard up drill bit body centre gripping under the effect of first spacing spring, guarantees the machining precision, and a grip block can protect upper portion in the long drill bit, prevents that long drill bit from damaging, can also prevent that its temperature is overheated to the cooling of drill bit body in the time of processing.

Description

A stable drill bit that is easy to replace

technical field

The utility model relates to the technical field of mechanical processing, in particular to a stable drill bit which is convenient for replacement.

Background technique

Drilling machine refers to a machine tool that mainly uses a drill to process holes on a workpiece. Usually, the rotation of the drill is the main movement, and the axial movement of the drill is the feed movement. The drilling machine has a simple structure and relatively low machining accuracy. It can drill through holes and blind holes, and replace special tools. , It can be reamed, countersinked, reamed or tapped. During the processing, the workpiece does not move, the tool moves, the center of the tool is aligned with the center of the hole, and the tool rotates (main motion). The characteristics of the drilling machine are the workpiece Fixed, the tool rotates. Due to the different sizes of the drilled holes, it is often necessary to replace the drill bit. When using some existing drilling machines, it is inconvenient to replace the drill bit, and the fixing method of the drill bit is relatively simple, which causes the drill bit to shake and affects the processing accuracy. Additional protection, easy to break, needs to be improved.

SUMMARY OF THE INVENTION

The utility model aims to solve the deficiencies of the prior art, and provides a stable drill bit which is easy to replace.

The utility model adopts the following technical solutions for realizing the above-mentioned purpose:

A stable drill bit that is easy to replace, comprising a drill body, a clamping cylinder and an installation block, the clamping cylinder is a hollow inverted truncated structure, the bottom wall of the installation block is provided with installation holes upward, and the installation holes are blind. The clamping cylinder is fixed on the bottom wall of the installation block and communicates with the installation hole of the installation block. The upper part of the drill bit body passes through the clamping cylinder and the installation hole from bottom to top, and the inner and lower part of the installation hole is provided with a first limit mechanism. The middle part and the upper part of the installation block are respectively provided with a second limit mechanism and a third limit mechanism, a cooling liquid flow path is opened on the side wall of the installation block, and a cooling channel communicated with the cooling liquid flow path is arranged on the top wall of the drill body. The bottom side wall of the drill bit body is provided with a liquid outlet hole, and the liquid outlet hole is communicated with the cooling through hole.

The first limiting mechanism includes several clamping blocks, the inner wall of the mounting hole is provided with several first limiting cavities, one side of the clamping blocks protrudes from the first limiting cavities, and the other side slides It is arranged on the inner wall of the first limit cavity, a first limit spring is connected between the clamping block and the inner side wall of the first limit cavity, and the clamping block protrudes from a part of the first limit cavity. The sides are hemispherical.

The second limit mechanism includes a first limit through hole arranged on the side wall of the mounting block, the drill body is provided with a through hole, and a limit is passed between the first limit through hole and the through hole of the drill body. pin.

The third limit mechanism includes a limit rod, the side wall of the mounting block is provided with a second limit through hole, the limit rod moves through the second limit through hole, and both ends extend out of the second limit through hole. The drill body is provided with a limit blind hole, the inner end of the limit rod extends into the limit blind hole, the installation block is provided with a pair of second limit cavities, two second limit cavities They are respectively located on the upper and lower sides of the second limit through hole and communicate with the second limit through hole. A vertical fixing rod is fixed in the second limit cavity, and a sliding sleeve is provided on the movable sleeve on the fixed rod. A connecting rod is hinged on the sliding sleeve, the other end of the connecting rod is hinged on the limit rod, a second limit spring is sleeved on the fixed rod, and both ends of the second limit spring are respectively fixed on the sliding sleeve and the second limit rod On the inner wall of the cavity away from the limit rod.

A pull block is connected to one end of the limit rod extending out of the second limit through hole.

The inner wall of the clamping cylinder is provided with a protrusion.

The beneficial effects of the utility model are: when the utility model is in use, it is convenient to disassemble and replace the drill bit body, the clamping block can clamp the drill bit body under the action of the first limit spring, prevent loosening, ensure the machining accuracy, and the clamping cylinder The middle and upper part of the long drill bit can be protected to prevent damage to the long drill bit, and the drill body can also be cooled during processing to prevent its temperature from overheating.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the enlarged structure schematic diagram of A place in Fig. 1;

In the figure: 1-bit body; 2-holding cylinder; 3-installation block; 4-first limit cavity; 5-first limit spring; 6-holding block; 7-limit pin; 8 - First limit through hole; 9 - Coolant flow path; 10 - Limit blind hole; 11 - Second limit cavity; 12 - Second limit spring; 13 - Fixed rod; 14 - Connecting rod; 15 -Sliding sleeve; 16-Limiting rod; 17-Pull block; 18-Second limit through hole; 19-Liquid outlet hole;

The following will be described in detail with reference to the accompanying drawings in conjunction with the embodiments of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is further described:

As shown in Figures 1 to 2, a stable drill bit that is easy to replace includes a drill bit body 1, a clamping cylinder 2 and a mounting block 3. The clamping cylinder 2 is a hollow inverted circular truncated structure, and the mounting block The bottom wall of 3 is provided with a mounting hole upward, and the mounting hole is a blind hole. The clamping cylinder 2 is fixed on the bottom wall of the mounting block 3 and communicates with the mounting hole of the mounting block 3. The upper part of the drill body 1 passes through the clamp from bottom to top. Hold the cylinder 2 and the installation hole, the inner and lower part of the installation hole is provided with a first limit mechanism, the middle and upper part of the installation block 3 are respectively provided with a second limit mechanism and a third limit mechanism, the side wall of the installation block 3 is opened There is a cooling liquid flow path 9, the top wall of the drill bit body 1 is provided with a cooling through hole that communicates with the cooling liquid flow path 9, the bottom side wall of the drill bit body 1 is provided with a liquid outlet hole 19, and the liquid outlet hole 19 communicates with the cooling through hole. .

The first limiting mechanism includes a plurality of clamping blocks 6, a plurality of first limiting cavities 4 are arranged on the inner wall of the mounting hole, and one side of the clamping blocks 6 protrudes from the first limiting cavity 4, The other side is slidably arranged on the inner wall of the first limiting cavity 4, and a first limiting spring 5 is connected between the clamping block 6 and the inner wall of the first limiting cavity 4, and the clamping block 6 extends. The side exiting the first limiting cavity 4 is hemispherical.

The second limit mechanism includes a first limit through hole 8 arranged on the side wall of the mounting block 3 , the drill body 1 is provided with a through hole, and the first limit through hole 8 and the through hole of the drill body 1 are arranged. A limit pin shaft 7 is penetrated between them.

The third limiting mechanism includes a limiting rod 16 , a second limiting through hole 18 is provided on the side wall of the mounting block 3 , and the limiting rod 16 moves through the second limiting through hole 18 and protrudes from both ends. The second limit through hole 18, the drill body 1 is provided with a limit blind hole 10, the inner end of the limit rod 16 extends into the limit blind hole 10, and the mounting block 3 is provided with a pair of second limit holes Cavity 11, two second limit cavities 11 are respectively located on the upper and lower sides of the second limit through hole 18 and communicate with the second limit through hole 18, the second limit cavities 11 are fixedly provided with The vertical fixed rod 13, the movable sleeve on the fixed rod 13 is provided with a sliding sleeve 15, the sliding sleeve 15 is hinged with a connecting rod 14, the other end of the connecting rod 14 is hinged on the limit rod 16, and the fixed rod 13 is sleeved with a The second limit spring 12, the two ends of the second limit spring 12 are respectively fixed on the sliding sleeve 15 and the inner wall of the second limit cavity 11 away from the limit rod 16.

A pull block 17 is connected to one end of the limit rod 16 extending out of the second limit through hole 18 .

The inner wall of the clamping cylinder 2 is provided with protrusions.

When replacing the drill body 1 of the present invention, first pull out the limit pin 7, then pull the pull block 17 to make the limit rod 16 come out from the limit blind hole 10, and pull the drill body 1 down to remove the drill body 1. Then pull the pull block 17 outward, insert the drill bit to be used upwards from the clamping cylinder 2, release the pull block 17, and insert the end of the limit rod 16 into the limit blind hole 10 of the drill body 1. When it is not stable enough , the limit pin 7 can be inserted into the first limit through hole 8. When the drill body 1 needs to be cooled during the machining process, the cooling liquid can be passed through the cooling liquid flow path 9, and the cooling liquid can pass along the drill body 1. The cooling through hole flows to the liquid outlet hole 19 , and after flowing out of the liquid outlet hole 19 , the drill body 1 is cooled.

When the utility model is in use, it is convenient to disassemble and replace the drill body 1. The clamping block 6 can clamp the drill body 1 under the action of the first limit spring 5 to prevent loosening and ensure the machining accuracy. The clamping cylinder 2 can be long The upper part of the drill bit is protected to prevent damage to the long drill bit, and the drill body 1 can also be cooled during processing to prevent its temperature from overheating.

The present utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned methods, as long as various improvements made by the method concept and technical solutions of the present utility model are adopted, or the Those applied to other occasions are all within the protection scope of the present invention.

Claims (6)

1. The stable drill bit convenient to replace is characterized by comprising a drill bit body (1), a clamping cylinder (2) and an installation block (3), wherein the clamping cylinder (2) is of a hollow inverted truncated cone-shaped structure, the bottom wall of the installation block (3) is upwards provided with an installation hole which is a blind hole, the clamping cylinder (2) is fixed on the bottom wall of the installation block (3) and is communicated with the installation hole of the installation block (3), the upper part of the drill bit body (1) penetrates through the clamping cylinder (2) and the installation hole from bottom to top, the lower part in the installation hole is provided with a first limiting mechanism, the middle part and the upper part in the installation block (3) are respectively provided with a second limiting mechanism and a third limiting mechanism, a cooling liquid flow path (9) is opened on the side wall of the installation block (3), the drill bit body (1) is provided with a cooling through hole communicated with the cooling liquid flow path (9), and the bottom side wall of the drill bit body (1) is provided with, the liquid outlet hole (19) is communicated with the cooling through hole.

2. The stable type drill bit convenient to change of claim 1, wherein the first limiting mechanism comprises a plurality of clamping blocks (6), a plurality of first limiting cavities (4) are arranged on the inner wall of the mounting hole, one side of each clamping block (6) extends out of the corresponding first limiting cavity (4), the other side of each clamping block (6) is slidably arranged on the inner wall of the corresponding first limiting cavity (4), a first limiting spring (5) is connected between the corresponding clamping block (6) and the inner side wall of the corresponding first limiting cavity (4), and one side of each clamping block (6) extending out of the corresponding first limiting cavity (4) is hemispherical.

3. The stable type drill bit convenient to replace according to claim 1, wherein the second limiting mechanism comprises a first limiting through hole (8) arranged on the side wall of the mounting block (3), the drill bit body (1) is provided with a through hole, and a limiting pin shaft (7) penetrates between the first limiting through hole (8) and the through hole of the drill bit body (1).

4. The stable type drill bit convenient to replace as claimed in claim 1, wherein the third limiting mechanism comprises a limiting rod (16), the side wall of the mounting block (3) is provided with a second limiting through hole (18), the limiting rod (16) movably passes through the second limiting through hole (18) and both ends of the limiting rod movably extend out of the second limiting through hole (18), the drill bit body (1) is provided with a limiting blind hole (10), the inner end of the limiting rod (16) extends into the limiting blind hole (10), the mounting block (3) is provided with a pair of second limiting cavities (11), the two second limiting cavities (11) are respectively positioned at the upper side and the lower side of the second limiting through hole (18) and are communicated with the second limiting through hole (18), a vertical fixing rod (13) is fixedly arranged in the second limiting cavity (11), a sliding sleeve (15) is movably sleeved on the fixing rod (13), and a connecting rod (14) is hinged on the sliding sleeve (15), the other end of the connecting rod (14) is hinged on the limiting rod (16), a second limiting spring (12) is sleeved on the fixing rod (13), and two ends of the second limiting spring (12) are respectively fixed on the inner wall, far away from the limiting rod (16), in the sliding sleeve (15) and the second limiting cavity (11).

5. The stable type drill bit convenient for replacement as claimed in claim 4, characterized in that the end of the limiting rod (16) extending out of the second limiting through hole (18) is connected with a pulling block (17).

6. The drill bit of claim 1, wherein the inner wall of the holder cylinder (2) is provided with a protrusion.

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