Split type pagoda drill

Abstract

The split type pagoda drill comprises a drill body, a drill handle and a limiting clamping piece, a screw hole is formed in the rear end of the drill body, and a positioning hole is formed in the position, located on the side edge of the screw hole, of the rear end of the drill body; a pressing block is arranged at the front end of the drill handle, a supporting block is arranged at the front end of the pressing block, a positioning block is arranged on the edge of the front end of the pressing block, and the thickness of the positioning block is smaller than that of the supporting block. A screw is arranged at the front end of the supporting block and is in threaded connection with the screw hole, and the front end of the supporting block abuts against the surface of the rear end of the drill body. The limiting clamping piece comprises a clamping ring part and a guide rod part, the clamping ring part is provided with a through opening and contains the supporting block, a notch is formed in the inner wall of the through opening, the guide rod part is arranged on the edge of one side of the clamping ring part and sleeved with a spring, and one end of the guide rod part is embedded into the positioning hole and abuts against the rear end of the drill body, so that the clamping ring part abuts against the abutting block under the action of the spring. The positioning block is embedded with the notch to realize rotary limiting, the clamping ring part is separated from the positioning block by pressing the limiting clamping piece, so that the drill handle is rotated to complete disassembly, and the operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a split-type pagoda drill. Background Technology

[0002] Due to its ability to create multiple hole diameters in a single operation, the pagoda drill offers irreplaceable high efficiency in industries such as sheet metal, automotive, electronics, and piping, making it suitable for batch processing of thin plates with multiple holes. Currently, different machine tools (such as drilling machines, milling machines, and machining centers) require different interface drill shanks (such as straight shanks, Morse taper shanks, and HSK tool holders) for installation. By adopting a replaceable shank structure, the same drill bit can be adapted to various devices by changing the drill shank, thus eliminating the need for a dedicated drill bit for each machine tool. In existing technologies, the drill shank is fixed to the drill bit using a threaded connection. Although rotating in the direction of the thread during drill bit rotation does not cause the thread to loosen, when the drill bit stops after high-speed rotation, inertia can cause the thread between the drill bit and the drill shank to loosen, thus affecting subsequent drilling accuracy. Therefore, those skilled in the art need to improve upon the existing technology to address these problems. Utility Model Content

[0003] To address the aforementioned problems, this utility model discloses a split-type pagoda drill, which uses a limiting clip to restrict the drill shank from rotating on its own, thereby preventing the threaded structure of the drill shank from loosening.

[0004] The specific technical solution is as follows:

[0005] A split-type pagoda drill includes a drill body, a drill shank, and a limiting clamp. The drill body has a threaded hole at its rear center, and at least two positioning holes are located on the side of the threaded hole at the rear end. The drill shank has a pressing block at its front end, a support block at its front center, and several positioning blocks evenly distributed along the front edge of the pressing block. The thickness of the positioning blocks is less than the thickness of the support blocks. The support block has a screw at its front end, which is threaded into the threaded hole, causing the front end of the support block to press against the rear end surface of the drill body. The limiting clamp... The device includes a retaining ring and a guide rod. The retaining ring has a central opening for accommodating a support block. Several recesses corresponding to the positions of the positioning blocks are formed on the inner wall of the opening. A guide rod is vertically arranged on one side of the retaining ring, corresponding to the position and number of positioning holes. A spring is fitted on each guide rod, and one end of each guide rod is embedded in the positioning hole and presses against the rear end of the drill body. This allows the retaining ring to press against the pressing block under the action of the spring, and the positioning block engages with the recesses to limit the rotation of the drill shank.

[0006] Furthermore, one end of the spring is fixedly connected to the surface of the retaining ring, and the other end of the spring is pressed against the rear end of the drill shank.

[0007] Furthermore, the length of the positioning hole is greater than the length of the guide rod portion.

[0008] Furthermore, the support block has a cylindrical structure, and the size of the support block is adapted to the size of the opening.

[0009] Furthermore, the thickness of the retaining ring is adapted to the thickness of the positioning block.

[0010] Furthermore, one end of the positioning block has chamfered edges on both sides.

[0011] The beneficial effects of this utility model are reflected in:

[0012] This utility model uses an elastic limiting clip to rotate and limit the drill shank. The positioning block fits into the notch to prevent the drill shank from becoming loose. When removing the drill shank, the limiting clip is pressed to disengage the retaining ring from the positioning block, allowing the drill shank to be rotated to complete the disassembly. The operation is simple and convenient, and it is highly practical. Attached Figure Description

[0013] Fig. 1 This is a schematic diagram of the structure of this utility model.

[0014] Fig. 2 This is a partial sectional view of the present invention.

[0015] Fig. 3 This is a three-dimensional structural diagram of the drill shank and the limiting clamp in this utility model.

[0016] Explanation of reference numerals in the attached drawings: Drill body 1, screw hole 101, positioning hole 102, drill shank 2, pressing block 21, positioning block 211, support block 22, screw 23, limiting clip 3, retaining ring 31, through opening 311, notch 312, guide rod 32, spring 33. Detailed Implementation

[0017] To make the technical solution of this utility model clearer and more explicit, the utility model will be further described below with reference to the accompanying drawings. Any solution derived by equivalent substitution and conventional reasoning of the technical features of this utility model falls within the protection scope of this utility model. The fixed connections and fixed settings mentioned in this utility model are all common connection methods in the mechanical field, including welding, bolt and nut connections, and screw connections.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Please see the appendix Figs. 1-3 This embodiment provides a split-type pagoda drill, including a drill body 1, a drill shank 2, and a limiting clamp 3. A screw hole 101 is provided at the center of the rear end of the drill body 1, and two positioning holes 102 are provided on both sides of the screw hole 101 at the rear end of the drill body 1. A pressing block 21 is provided at the front end of the drill shank 2, and a support block 22 is provided at the center of the front end of the pressing block 21. Four positioning blocks 211 are evenly distributed along the front edge of the pressing block 21, and the thickness of the positioning blocks 211 is less than the thickness of the support blocks 22. A screw 23 is provided at the front end of the support block 22, and the screw 23 is threadedly connected to the screw hole 101, causing the front end of the support block 22 to press against the rear end surface of the drill body 1. The limiting clip 3 includes a retaining ring portion 31 and a guide rod portion 32. The retaining ring portion 31 has a circular ring structure, and its thickness is adapted to the thickness of the positioning block 211. A circular opening 311 is provided in the center of the retaining ring portion 31 to accommodate the support block 22. Four recesses 312 corresponding to the positions of the positioning block 211 are provided on the inner wall of the opening 311. Two guide rod portions 32 are vertically arranged on one side surface edge of the retaining ring portion 31. The guide rod portions 32 are all located outside the recesses 312 to avoid contact with the positioning block 211 and causing rotational limitation. A spring 33 is sleeved on each guide rod portion 32, and one end of the guide rod portion 32 is embedded in the positioning hole 102 and presses against the rear end of the drill body 1. Under the action of the spring 33, the retaining ring portion 31 presses against the pressing block 21, and the positioning block 211 and the recesses 312 are engaged to realize the rotational limitation of the drill shank 2 by the limiting clip 3.

[0020] In this embodiment, one end of the spring 33 is connected and fixed to the surface of the retaining ring 31 by welding to prevent the spring 33 from falling off, and the other end of the spring 33 presses against the rear end surface of the drill shank 2, thereby providing support for the retaining ring 31.

[0021] In this embodiment, the length of the positioning hole 102 is greater than the length of the guide rod portion 32, so that the limiting clip 3 can have sufficient distance displacement and disengage from the positioning block 211.

[0022] In this embodiment, the support block 22 has a cylindrical structure, and the size of the support block 22 is adapted to the size of the opening 311.

[0023] In this embodiment, one end of the positioning block 211 is chamfered on both sides so that when the spring 33 is reset, the notch 312 of the retaining ring 31 can be smoothly engaged with the positioning block 211.

[0024] During installation, the guide rod 32 of the limiting clip 3 is first inserted into the positioning hole 102 of the drill body 1, and the limiting clip 3 is pressed to keep the spring 33 compressed. Then, the screw 23 of the drill shank 2 is screwed into the screw hole 101 until the support block 22 presses against the rear end of the drill body 1. Due to the fixed thread structure, the position of the positioning block 211 corresponds to the position of the recess 312. Then, the limiting clip 3 is released, and under the action of the spring 33, the retaining ring 31 presses against the pressing block 21. At the same time, the recess 312 engages with the positioning block 211, thereby achieving rotational limiting. During disassembly, the limiting clip 3 is first pressed to disengage the retaining ring 31 from the positioning block 211, and then the drill shank 2 is rotated to complete the disassembly.

[0025] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A split-type pagoda drill, characterized in that, The drill body (1), drill shank (2), and limiting clip (3) are included. The drill body (1) has a screw hole (101) at the center of its rear end, and at least two positioning holes (102) are provided on the side of the screw hole (101) at the rear end of the drill body (1). The drill shank (2) has a pressing block (21) at its front end, and a support block (22) is provided at the center of the front end of the pressing block (21). Several positioning blocks (211) are evenly distributed on the front edge of the pressing block (21), and the thickness of the positioning blocks (211) is less than the thickness of the support blocks (22). The front end of the support blocks (22) is provided with a screw (23), and the screw (23) is threadedly connected to the screw hole (101) so that the front end of the support blocks (22) presses against the rear end surface of the drill body (1). The limiting clip (3) includes a retaining ring (31). The circlip (31) and guide rod (32) are provided. The center of the circlip (31) is provided with a through-hole (311) for accommodating the support block (22). The inner wall of the through-hole (311) is provided with a number of recesses (312) corresponding to the position of the positioning block (211). The guide rod (32) is vertically arranged on one side surface edge of the circlip (31) and corresponds to the position and number of the positioning holes (102). A spring (33) is sleeved on each guide rod (32), and one end of the guide rod (32) is embedded in the positioning hole (102) and pressed against the rear end of the drill body (1). The circlip (31) is pressed against the pressing block (21) under the action of the spring (33), and the positioning block (211) and the recess (312) are engaged to realize the rotation limit of the limiting card (3) on the drill shank (2).

2. A split-type pagoda drill as described in claim 1, characterized in that, One end of the spring (33) is connected and fixed to the surface of the retaining ring (31), and the other end of the spring (33) presses against the rear end of the drill shank (2).

3. A split-type pagoda drill as described in claim 1, characterized in that, The length of the positioning hole (102) is greater than the length of the guide rod (32).

4. A split-type pagoda drill as described in claim 1, characterized in that, The support block (22) has a cylindrical structure, and the size of the support block (22) is adapted to the size of the opening (311).

5. A split-type pagoda drill as described in claim 1, characterized in that, The thickness of the retaining ring (31) is adapted to the thickness of the positioning block (211).

6. A split-type pagoda drill as described in claim 5, characterized in that, The positioning block (211) has chamfered edges on both sides at one end.

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