CN111112701A

CN111112701A - Assembled hole bores

Info

Publication number: CN111112701A
Application number: CN202010062476.3A
Authority: CN
Inventors: 史俭六; 陈子彦; 陆凌凯; 徐志豪; 郑芳; 赵其芳
Original assignee: Est Tools Co ltd
Current assignee: Est Tools Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-05-08
Anticipated expiration: 2040-01-19
Also published as: CN111112701B

Abstract

The invention discloses an assembled hole drill which comprises a twist drill, a spring, a hole drill cutter body, a special-shaped screw, a common screw, a drill handle and a rubber ring. The twist drill is in interference fit with the spring, and the twist drill is screwed with the drill handle through threads. The handle of the hole drill is provided with four holes, and the drill handle is provided with two spiral grooves. The special-shaped screw has a limiting function, and the lower end of the special-shaped screw is provided with a section of cylinder. The rubber ring is arranged in the arc groove of the drill handle, during assembly, the special-shaped screw is screwed into the threaded hole to be matched with the spiral groove to realize axial limiting of the drill handle, and the rubber ring and the hole drill cutter body are extruded to form a reaction force to remove an assembly gap. The matching mode solves the problems that when the screw is screwed down to be limited on the plane flat surface of the drill handle, the screw cannot be disassembled and the cutter body and the drill handle of the hole drill are scrapped due to overlarge torque, improves the utilization rate of the hole drill handle and is beneficial to energy conservation and emission reduction; and a common screw is screwed into the third threaded hole and is tightly abutted to the middle flat part on the drill handle to improve the rigidity.

Description

Assembled hole bores

Technical Field

The invention belongs to the field of hardware machining tools, and particularly relates to an assembled hole drill.

Background

At present hole drill bit commonly used has multiple form with handle of a knife connected mode, the mode commonly used is through the plane on the direct tightening of hole drill bit stalk portion screw to hole drill stalk portion excircle, thereby reach assembly connection's purpose, this kind of connected mode clamping speed is slow, the clamping is inconvenient, drilling in-process torsion is through screwing up screw terminal surface transmission moment of torsion, strong impact force appears in the drilling, can cause screw and hole drill handle upper plane to warp, can't dismantle, in case the blade drops or collapses the sword, the drill bit just can not continue to use, but the hole drill handle of a knife is intact basically, cause the wasting of resources in a large number. In conclusion, the existing connection structure of the hole drill and the drill handle is not reasonable, the problems that the connection speed is low, the clamping is inconvenient, the locking screw of the handle part cannot be disassembled after the cutter is drilled are solved, the utilization rate of the cutter handle is low and the like exist.

Disclosure of Invention

The invention aims to provide an assembled type hole drill aiming at the defects of the prior art. The novel structure hole drill mainly solves the problems that a common hole drill is low in connecting and clamping speed with a tool handle, inconvenient to disassemble, low in tool handle utilization rate and the like, and is reasonable in structure, convenient to use and high in drill bit utilization rate.

The purpose of the invention is realized by the following technical scheme: an assembled hole drill comprises a twist drill, a spring, a hole drill cutter body, a first special-shaped screw, a second special-shaped screw, a drill handle, a second screw and a rubber ring; wherein, the spring is sleeved on the twist drill; the handle part of the hole drill cutter body is provided with a first threaded hole, a second threaded hole and a cylindrical hole; the cylindrical surface of the drill shank is provided with two spiral grooves and threaded holes, the cylindrical surface of the drill shank is inserted into the shank of a drill cutter body, and the lower ends of the first special-shaped screw and the second special-shaped screw are cylindrical ends and are respectively screwed into the first threaded hole and the second threaded hole and matched with the spiral grooves; a blind hole is formed in the outer end face of the drill handle, a twist drill is inserted into the blind hole, and a rubber ring is sleeved on the cylindrical surface of the drill handle; the screw II is screwed into the threaded hole of the drill handle through the cylindrical hole and is matched with the twist drill.

Furthermore, the hole drill further comprises a first screw, a third threaded hole is formed in the handle of the hole drill cutter body, a flat plane is further arranged on the cylindrical surface of the drill handle, and the first screw is screwed into the third threaded hole and is matched with the flat plane.

Furthermore, the cylindrical surface of the drill handle is provided with an axial groove at the flat plane and the threaded hole of the drill handle; during assembly, the special-shaped screw I and the special-shaped screw II are matched with the spiral groove after being flattened through the groove and the plane respectively, so that the cylindrical surface of the drill shank is inserted into the handle part of the drill body of the hole drill.

Furthermore, the first threaded hole, the cylindrical hole, the second threaded hole and the third threaded hole are uniformly distributed along the cylindrical surface of the handle part of the hole drill cutter body in sequence.

Furthermore, a counter bore is formed in the threaded hole of the drill handle, and the second screw is screwed into the threaded hole of the drill handle and then matched with the counter bore.

Further, the two spiral grooves are centrosymmetric.

Furthermore, the spiral angle of the spiral groove is 0-5 degrees, and the groove depth is 1-3 mm.

Furthermore, the hole drill cutter body is provided with a chip groove, and the spiral angle of the chip groove is 10-30 degrees.

Further, the twist drill is in interference fit with the spring.

Further, the hole drill cutter body is provided with 4-24 cutting blades.

The invention has the beneficial effects that: according to the invention, the cylindrical hole section of the inner hole at the other end of the blade part of the cutter body is matched with the cylindrical section of the cutter handle, the cutter body and the cutter handle are oppositely moved for a certain distance and rotate through the special-shaped screw, the cutter body of the hole drill and the drill handle are oppositely moved and tightly matched through the spiral effect of 2 spiral grooves of the cutter handle, the quick connection is realized, the radial limit between the cutter body and the cutter handle is realized through the connection of the special-shaped screw, the steps of the cutter handle are axially positioned, the torque is transmitted in the drilling process, the rubber ring is extruded to form a reaction force, the problem that the cutter is easy to loosen in the drilling process is solved, the common screw is additionally arranged. The cutter body cylindrical hole is matched with the cutter handle cylinder, so that the positioning precision is high after assembly, and the hole drill has the technical advantages of stability, high stability, strong rigidity and convenience in disassembly in the drilling process.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a body of a hole drill according to an embodiment of the present invention;

FIG. 3 is a schematic view of a shank of a hole drill according to an embodiment of the present invention;

FIG. 4 is a schematic view of a drill shank configuration of an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a drill shank configuration of an embodiment of the present invention;

FIG. 6 is a perspective view of a shaped screw according to an embodiment of the present invention;

FIG. 7 is a perspective view of a rubber ring of an embodiment of the present invention;

in the figure, a twist drill 1, a spring 2, a hole drill cutter body 3, a first special-shaped screw 4-1, a second special-shaped screw 4-2, a first screw 5, a drill handle 6, a first threaded hole 7-1, a second threaded hole 7-2, a cylindrical hole 8, a third threaded hole 9, a spiral groove 10, a flat plane 11, a second screw 12 and a rubber ring 13.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not limited thereto.

Referring to fig. 1, the assembly type hole drill in the embodiment comprises a twist drill 1, a spring 2, a hole drill cutter body 3, a first special-shaped screw 4-1, a second special-shaped screw 4-2, a first screw 5, a drill handle 6 and a rubber ring 13. The spring 2 is sleeved on the twist drill 1 in an interference fit manner; the hole drilling cutter body 3 is provided with 4-24 cutting blades, the number of the cutting blades can be set according to actual needs, each cutting blade is provided with a chip discharge groove, and the spiral angle of each chip discharge groove is 10-30 degrees.

As shown in fig. 2 and 3, the shank of the hole-drilling tool body 3 is provided with four holes, namely a first threaded hole 7-1, a cylindrical hole 8, a second threaded hole 7-2 and a third threaded hole 9, which are uniformly distributed along the circumference in sequence.

As shown in fig. 4 and 5, the rear end of the cylindrical surface of the drill handle 6 (the end far away from the body 3 of the hole drill) is provided with a circle of circular arc groove, a rubber ring 13 (fig. 7) is embedded into the circular arc groove and tightly sleeved on the cylindrical surface of the drill handle 6, the outer end surface of the cylindrical part of the drill handle 6 assembly is provided with a blind hole, the cylindrical surface of the cylindrical part of the drill handle 6 assembly is provided with two spiral grooves 10, a radial flat plane 11 and a threaded hole, and the threaded hole is further provided with a counter bore. The two spiral grooves 10 are centrosymmetric, and the plane flat 11 and the threaded hole of the drill handle 6 are respectively and symmetrically positioned in the middle of the circumferential part between the two spiral grooves 10. The spiral angle theta of the spiral groove 10 is 0-5 degrees, and the groove depth is 1-3 mm. The two spiral grooves 10 are not communicated, one end of each spiral groove 10 is an arc end, and the other end of each spiral groove 10 is communicated with the flat plane 11 or the threaded hole of the drill handle 6. The drill handle 6 is assembled on the cylindrical surface of the cylindrical part, and two axial grooves are symmetrically formed at the threaded holes of the flat plane 11 and the drill handle 6, so that the drill handle is convenient to assemble quickly.

As shown in FIG. 6, the upper end of the special-shaped screw is a cylindrical step with a length of 0.5-1.5 mm, and the lower end of the special-shaped screw is provided with a section of cylinder with a length of 0.1-1.5 mm, which is a cylindrical end and is matched with the arc end of the spiral groove 10. The special-shaped screw has a limiting function.

When the special-shaped screw I4-1 and the special-shaped screw II 4-2 are assembled, the special-shaped screw I4-1 and the special-shaped screw II 4-2 are screwed into the first threaded hole 7-1 and the second threaded hole 7-2 respectively, two axial grooves of the drill handle 6 are aligned to the positions of the special-shaped screw I4-1 and the special-shaped screw II 4-2, the drill handle 6 is inserted into a handle part of the hole drill cutter body 3 and then rotates, the special-shaped screw moves along the spiral groove 10, the drill handle 6 approaches towards the hole drill cutter body 3, the cylindrical end of the special-shaped screw is matched with the spiral groove 10 to realize axial limiting of the drill handle 6, the rubber ring 13 is extruded to form a reaction; the special-shaped screw is screwed down by a hexagonal wrench, the cylindrical step is closely attached to the outer cylindrical surface of the handle part of the hole drill cutter body 3 and then limited, and radial torque is transmitted. The matching mode solves the problems that when a common hole drill is screwed down on the plane of the drill handle by using a screw for limiting, the screw cannot be detached and the cutter body of the hole drill and the drill handle are scrapped due to overlarge torque in the drilling operation, improves the utilization rate of the hole drill handle and is beneficial to energy conservation and emission reduction. Then, the twist drill 1 is inserted into the blind hole of the drill handle 6, the screw II 12 is screwed into the thread of the drill handle 6, and the twist drill 1 is fixed; after the assembly, the twist drill 1 is 5-20 mm higher than a cutting blade on the hole drill cutter body 3. When the hole drill of the embodiment needs to drill a hole with a diameter of more than 50 mm, the first screw 5 is screwed into the third threaded hole 9 and is matched with the flat surface 11 on the drill shank 6 to tightly abut against the flat surface to improve the rigidity.

In addition, it should be noted that the shapes and names of the components of the specific embodiments described in the present specification may be different, and the contents described in the present specification are merely illustrative of the present invention. All changes in the constructions, features and principles of the invention, or even simple variations thereof, are contemplated as falling within the scope of the invention.

Claims

1. An assembled hole drill is characterized by comprising a twist drill (1), a spring (2), a hole drill cutter body (3), a special-shaped screw I (4-1), a special-shaped screw II (4-2), a drill handle (6), a screw II (12), a rubber ring (13) and the like; wherein, the spring (2) is sleeved on the twist drill (1). The handle of the hole drilling cutter body (3) is provided with a first threaded hole (7-1), a second threaded hole (7-2) and a cylindrical hole (8). The cylindrical surface of the drill handle (6) is provided with two spiral grooves (10) and threaded holes, the cylindrical surface of the drill handle (6) is inserted into the handle part of the drill cutter body (3), and the lower ends of the special-shaped screw I (4-1) and the special-shaped screw II (4-2) are cylindrical ends and are respectively screwed into the first threaded hole (7-1) and the second threaded hole (7-2) and matched with the spiral grooves (10). A blind hole is formed in the outer end face of the drill handle (6), the twist drill (1) is inserted into the blind hole, and the rubber ring (13) is sleeved on the cylindrical surface of the drill handle (6); the second screw (12) is screwed into the threaded hole of the drill handle (6) through the cylindrical hole (8) and is matched with the twist drill (1).

2. The assembled type hole drill according to claim 1, further comprising a first screw (5), wherein a third threaded hole (9) is formed in the shank of the drill body (3), the cylindrical surface of the drill shank (6) is further provided with a flat surface (11), and the first screw (5) is screwed into the third threaded hole (9) and is matched with the flat surface (11).

3. The assembly type hole drill according to claim 2, characterized in that the cylindrical surface of the drill shank (6) is provided with an axial groove at the threaded holes of the flat surface (11) and the drill shank (6); during assembly, the first special-shaped screw (4-1) and the second special-shaped screw (4-2) are matched with the spiral groove (10) after passing through the groove and the flat surface (11) respectively, so that the cylindrical surface of the drill handle (6) is inserted into the handle part of the drill cutter body (3).

4. The assembly type hole drill according to claim 2, characterized in that the first threaded hole (7-1), the cylindrical hole (8), the second threaded hole (7-2) and the third threaded hole (9) are evenly distributed along the cylindrical surface of the shank part of the hole drill body (3) in sequence.

5. The assembly type hole drill is characterized in that a counter bore is formed in the threaded hole of the drill handle (6), and the second screw (12) is screwed into the threaded hole of the drill handle (6) and then matched with the counter bore.

6. The fabricated hole drill according to claim 1, characterized in that the two helical flutes (10) are centrosymmetric.

7. The fabricated hole drill according to claim 1, wherein the spiral angle of the spiral groove (10) is 0 to 5 ° and the groove depth is 1 to 3 mm.

8. The assembly type hole drill according to claim 1, characterized in that the hole drill body (3) is provided with chip flutes and the helix angle thereof is 10-30 °.

9. The fabricated hole drill according to claim 1, wherein the twist drill (1) is interference fitted with the spring (2).

10. The assembly type hole drill according to claim 1, characterized in that the hole drill body (3) is provided with 4-24 cutting inserts.