A ball-type rear handle drill point

Abstract

The utility model discloses a ball-type rear handle drill tip, comprising a drill tip and a module, wherein the bottom end of the drill tip is provided with an integrally formed spherical base; wherein the top end of the spherical base is provided with a cylinder for reserving a gap between the module and the drill tip, and the bottom end of the spherical base is a circular plane; and the top end of the module is provided with a base groove that is interference-fitted with the spherical base. The beneficial effects of the utility model are: the drill base is designed to be spherical, the connection strength of the module drill rod is greatly increased, and the stress at the right angle between the module and the lower end of the base is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drill tips, in particular to a ball-type rear-shank drill tip. Background Art

[0002] The existing modules and drill bits are connected by two cylinders, the module drill rod connection strength is average, and the stress at the right angle between the module and the lower end of the base is relatively large. Therefore, a ball-type rear handle drill tip is proposed. Summary of the invention

[0003] The utility model aims to provide a ball-type rear handle drill tip to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A ball-type rear handle drill tip, comprising a drill tip and a module, wherein the bottom end of the drill tip is provided with an integrally formed spherical base;

[0006] The top of the spherical base is provided with a cylinder for reserving a gap between the module and the drill tip, and the bottom of the spherical base is a circular plane;

[0007] The top of the module is provided with a base groove which is interference fit with the spherical base.

[0008] Furthermore, the height of the cylinder is 1 mm.

[0009] Furthermore, the diameter of the cylinder is φ8±0.1 mm.

[0010] Furthermore, the radius of the spherical base is SR6±0.1 mm.

[0011] Furthermore, the circular plane diameter is φ4±0.1 mm.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The drill bit base is designed to be spherical, which greatly increases the connection strength of the module drill pipe and reduces the stress at the right angle between the module and the lower end of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the BB cross-section structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the EE cross-sectional structure of the utility model. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0017] Embodiment 1:

[0018] See also Figure 1-2 , the utility model provides a technical solution:

[0019] A ball-type rear-shank drill point comprises a drill point 1 and a module 2. An integrally formed spherical base is arranged at the bottom end of the drill point 1 for combining with the module 2. A cylinder is arranged at the top end of the spherical base for reserving a gap between the module 2 and the drill point 1, so that the bottom end of the spherical base is a circular plane. In order to realize the combination of the drill point 1 and the module 2, a base groove which is interference-fitted with the spherical base is provided at the top end of the module 2.

[0020] like Figure 1 As shown:

[0021] The cylinder height is 1mm and the cylinder diameter is φ8±0.1mm.

[0022] like Figure 1 As shown:

[0023] The radius of the spherical base is SR6±0.1mm, and the diameter of the circular plane is φ4±0.1mm.

[0024] Working principle:

[0025] The drill tip is screwed into the module 2 using the spherical base, which reduces the stress of the lower end of the spherical base of the drill tip 1 on the module during use, and the circular plane at the lower end of the spherical base cooperates with the module 2.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball-type rear shank drill tip, comprising a drill tip (1) and a module (2), characterized in that: The bottom end of the drill tip (1) is provided with an integrally formed spherical base; The top of the spherical base is provided with a cylinder for reserving a gap between the module (2) and the drill tip (1), and the bottom of the spherical base is a circular plane; The top of the module (2) is provided with a base groove which is interference-fitted with the spherical base.

2. A ball-type rear shank drill point according to claim 1, characterized in that: The cylinder height is 1 mm.

3. A ball-type rear shank drill point according to claim 1, characterized in that: The diameter of the cylinder is φ8±0.1 mm.

4. A ball-type rear shank drill point according to claim 1, characterized in that: The radius of the spherical base is SR6±0.1 mm.

5. The ball-type rear shank drill point according to claim 1, characterized in that: The circular plane diameter is φ4±0.1 mm.

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