Deep hole stepped drill bit

Abstract

The utility model discloses a deep hole stepped drill bit which comprises a first drill bit body, a second drill bit body is arranged at the top of the first drill bit body, and a fixing assembly used for fixing and detaching the first drill bit body and the second drill bit body is arranged at the joint of the first drill bit body and the second drill bit body. The fixing assembly comprises a connecting block fixedly connected to the top end of the first drill bit, and a connecting hole is formed in the bottom end of the second drill bit. The top of the connecting block is provided with a fixing assembly used for fixing the position of the connecting block. Through the design of the connecting hole, the connecting block, the fixing assembly and the sealing assembly, when the drill bit is used, the connecting block at the top of the first drill bit penetrates into the connecting hole formed in the bottom end of the second drill bit, and then the connecting block is fixed in the connecting hole through the fixing assembly, so that the first drill bit and the second drill bit are fixed; when one of the drill bits is damaged, the two drill bits are directly detached, and one of the drill bits is replaced.

Description

Technical Field

[0001] The utility model relates to the field of drill bits, in particular to a deep hole step drill bit. Background Art

[0002] A deep hole step drill bit is a specially designed drill bit, usually used for drilling in deep holes. They have a gradually increasing diameter so that the hole diameter can be gradually expanded during the drilling process. When drilling, a small hole is first drilled through a small head, and then the hole is directly expanded through a large head at the rear end of the small head, so that the formed hole is stepped. The two drill bits on the existing step drill bit are fixed together, and in actual use, it is rare that two drill bits are damaged at the same time. However, when one of the drill bits is damaged, both drill bits need to be replaced at the same time, resulting in a waste of resources. Utility Model Content

[0003] The utility model aims to provide a deep hole step drill bit to solve the problems raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical solutions: a deep hole step drill bit, comprising a first drill bit, a second drill bit is arranged on the top of the first drill bit, and a fixing assembly for fixing and separating the first drill bit and the second drill bit is arranged at the connection between the first drill bit and the second drill bit;

[0005] The fixing assembly comprises a connecting block fixedly connected to the top end of the first drill bit, and a connecting hole is formed at the bottom end of the second drill bit;

[0006] A fixing component for fixing the position of the connecting block is arranged on the top of the connecting block, and a sealing component for preventing waste chips from entering the connecting hole is arranged at the connection between the connecting hole and the connecting block.

[0007] Preferably, the horizontal transverse cross-sections of the connecting hole and the connecting block are both square with triangular grooves on the top and bottom to limit the rotation of the connecting hole in the connecting block.

[0008] Preferably, a second material guide groove is formed on an outer wall of the first drill bit, and a first material guide groove is formed on an outer wall of the second drill bit.

[0009] Preferably, the fixing assembly includes connecting grooves symmetrically opened on both sides of the second drill bit, a threaded hole is opened on the inner wall of one side of the connecting groove, and threaded grooves are symmetrically opened on both sides of the connecting block. Positioning bolts are inserted and connected inside the connecting grooves, and the positioning bolts are threadedly inserted and connected inside the threaded holes and the threaded grooves in sequence.

[0010] Preferably, a fixing ring is fixedly connected to the inner wall of one side of the connecting groove, and a sealing gasket is fixedly connected to one side of the fixing ring.

[0011] Preferably, the positioning bolt is inserted and connected in the middle of the sealing gasket, and the positioning bolt is inserted and connected in the middle of the fixing ring.

[0012] Preferably, a sealing groove is formed on the inner wall of the bottom of the connecting hole, a sealing ring is inserted and connected inside the sealing groove, and the sealing ring is sleeved on the bottom of the connecting block.

[0013] Technical effects and advantages of the utility model:

[0014] The utility model adopts the design of the connecting hole, the connecting block, the fixing assembly and the sealing assembly. When in use, the connecting block on the top of the first drill bit is inserted into the connecting hole opened at the bottom end of the second drill bit, and then the connecting block is fixed inside the connecting hole by the fixing assembly, so as to complete the fixation between the first drill bit and the second drill bit. When one of the drill bits is damaged, the two drill bits are directly disassembled and one of the drill bits is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 It is a front sectional structural schematic diagram of the utility model.

[0017] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of part A.

[0018] Figure 4 For this utility model Figure 2 The enlarged structural diagram of part B is shown in the figure.

[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of the utility model when viewed from above.

[0020] In the figure: 1. first drill bit; 2. second drill bit; 3. connecting hole; 4. connecting block; 5. positioning bolt; 6. connecting groove; 7. threaded hole; 8. threaded groove; 9. sealing gasket; 10. first material guide groove; 11. second material guide groove; 12. sealing groove; 13. sealing ring; 14. fixing ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figure 1-5 A deep hole step drill bit shown in the figure comprises a first drill bit 1, a second drill bit 2 is arranged on the top of the first drill bit 1, and a fixing component for fixing and splitting the first drill bit 1 and the second drill bit 2 is arranged at the connection between the first drill bit 1 and the second drill bit 2; the fixing component comprises a connecting block 4 fixedly connected to the top of the first drill bit 1, and a connecting hole 3 is opened at the bottom end of the second drill bit 2; a fixing component for fixing the position of the connecting block 4 is arranged on the top of the connecting block 4, and a sealing component for blocking waste chips from entering the connecting hole 3 is arranged at the connection between the connecting hole 3 and the connecting block 4, and the horizontal transverse sections of the connecting hole 3 and the connecting block 4 are both squares with triangular grooves opened at the top and the bottom, which are used to limit the rotation of the connecting hole 3 in the connecting block 4.

[0023] It should be noted that the bottoms of the first drill bit 1 and the second drill bit 2 are both cutting edges. When in use, the first drill bit 1 is used to first drill a hole in the material. When the second drill bit 2 comes into contact with the hole, the hole is enlarged so that the hole is stepped. The length of the drill hole is extended by increasing the length of the first drill bit 1 or the second drill bit 2. The opened connecting hole 3 is adapted to the provided connecting block 4, and is used to insert the connecting block 4 into the interior of the connecting hole 3 when in use.

[0024] Furthermore, when in use, the connecting block 4 on the top of the first drill bit 1 is inserted into the connecting hole 3 opened at the bottom end of the second drill bit 2, and then the connecting block 4 is fixed inside the connecting hole 3 through a fixing component, thereby completing the fixation between the first drill bit 1 and the second drill bit 2. When one of the drill bits is damaged, the two drill bits are directly disassembled and one of the drill bits is replaced.

[0025] Specifically, a second material guiding groove 11 is formed on an outer wall of the first drill bit 1 , and a first material guiding groove 10 is formed on an outer wall of the second drill bit 2 .

[0026] Specifically, the fixing assembly includes connecting grooves 6 symmetrically opened on both sides of the second drill bit 2, a threaded hole 7 is opened on the inner wall of one side of the connecting groove 6, and threaded grooves 8 are symmetrically opened on both sides of the connecting block 4. The interior of the connecting groove 6 is inserted and connected with a positioning bolt 5, and the positioning bolt 5 is threadedly inserted and connected in the interior of the threaded hole 7 and the threaded groove 8 in turn.

[0027] It should be noted that, through the design of the specially shaped connecting hole 3 and the connecting block 4, when the connecting block 4 is inserted into the connecting hole 3, the threaded groove 8 on the connecting block 4 is located in the same direction as the connecting groove 6, and when the top of the connecting block 4 is fitted with the inner wall of the top of the connecting hole 3, the threaded groove 8 is aligned with the threaded hole 7, and the position of the connecting block 4 is fixed by the positioning bolt 5.

[0028] Specifically, a fixing ring 14 is fixedly connected to the inner wall of one side of the connecting groove 6 , a sealing gasket 9 is fixedly connected to one side of the fixing ring 14 , a positioning bolt 5 is inserted and connected to the middle of the sealing gasket 9 , and a positioning bolt 5 is inserted and connected to the middle of the fixing ring 14 .

[0029] It should be noted that the sealing gasket 9 is made of rubber. When in use, the gap between the positioning bolt 5 and the connecting groove 6 is filled by squeezing the positioning bolt 5, thereby sealing the positioning bolt 5 and the connecting groove 6 to prevent debris from entering the connecting hole 3 from the connection between the positioning bolt 5 and the connecting groove 6; the fixing ring 14 and the sealing gasket 9 are both in the shape of a circular ring. The fixing ring 14 is made of metal. The fixing ring 14 and the sealing gasket 9 are connected by glue. The metal fixing ring 14 is used to restrict the sealing gasket 9 from being directly deformed when it is inserted into the connecting groove 6, thereby facilitating the sealing gasket 9 to be inserted into the interior of the connecting groove 6. The fixing ring 14 is fixed to the interior of the connecting groove 6 by glue.

[0030] Specifically, a sealing groove 12 is formed on the inner wall of the bottom of the connecting hole 3 , and a sealing ring 13 is inserted and connected inside the sealing groove 12 . The sealing ring 13 is sleeved on the bottom of the connecting block 4 .

[0031] It should be noted that the sealing ring 13 is fixedly connected to the inside of the sealing groove 12 by bonding, and is sleeved on but not fixed on the bottom of the connecting block 4. When the connecting block 4 needs to be moved out of the connecting hole 3, the sealing ring 13 is still fixed to the inside of the sealing groove 12; the sealing ring 13 is made of rubber material, and when in use, it fills the gap at the connection between the connecting block 4 and the connecting hole 3 through deformation, thereby sealing the connection between the connecting block 4 and the connecting hole 3, thereby preventing debris from entering the inside of the connecting hole 3.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep hole step drill bit, comprising a first drill bit (1), a second drill bit (2) being arranged on the top of the first drill bit (1), characterized in that: A fixing assembly for fixing and separating the first drill bit (1) and the second drill bit (2) is provided at the connection between the first drill bit (1) and the second drill bit (2); The fixing assembly comprises a connecting block (4) fixedly connected to the top end of the first drill bit (1), and a connecting hole (3) is provided at the bottom end of the second drill bit (2); A fixing component for fixing the position of the connecting block (4) is arranged on the top of the connecting block (4), and a sealing component for preventing waste chips from entering the connecting hole (3) is arranged at the connection between the connecting hole (3) and the connecting block (4).

2. A deep hole step drill according to claim 1, characterized in that: The horizontal transverse cross-sections of the connection hole (3) and the connection block (4) are both square with triangular grooves at the top and bottom, which are used to limit the rotation of the connection hole (3) in the connection block (4).

3. A deep hole step drill according to claim 1, characterized in that: The outer wall of the first drill bit (1) is provided with a second material guide groove (11), and the outer wall of the second drill bit (2) is provided with a first material guide groove (10).

4. A deep hole step drill according to claim 3, characterized in that: The fixing assembly comprises connecting grooves (6) symmetrically arranged on both sides of the second drill bit (2), a threaded hole (7) is arranged on the inner wall of one side of the connecting groove (6), threaded grooves (8) are symmetrically arranged on both sides of the connecting block (4), a positioning bolt (5) is inserted and connected inside the connecting groove (6), and the positioning bolt (5) is threadedly inserted and connected in turn inside the threaded hole (7) and the threaded groove (8).

5. A deep hole step drill according to claim 4, characterized in that: A fixing ring (14) is fixedly connected to the inner wall of one side of the connecting groove (6), and a sealing gasket (9) is fixedly connected to one side of the fixing ring (14).

6. A deep hole step drill according to claim 5, characterized in that: The positioning bolt (5) is inserted and connected in the middle of the sealing gasket (9), and the positioning bolt (5) is inserted and connected in the middle of the fixing ring (14).

7. The deep hole step drill according to claim 1, characterized in that: A sealing groove (12) is provided on the inner wall of the bottom of the connection hole (3), a sealing ring (13) is inserted and connected inside the sealing groove (12), and the sealing ring (13) is sleeved on the bottom of the connection block (4).

Images