Composite forming drill bit for machining blind hole

Abstract

The utility model belongs to the technical field of drill bits, particularly relates to a composite forming drill bit for machining blind holes, and provides the following scheme aiming at the problems that when an existing drill bit is used, the drill bit is inconvenient to disassemble and assemble, when blind holes with different hole diameters are machined, the drill bit cannot be quickly disassembled and replaced, and the practicability is poor. Comprising a drill bit body, one end of the drill bit body is connected with a connecting piece, and a limiting mechanism used for limiting the drill bit is arranged on the outer surface of the connecting piece; the limiting mechanism comprises a movable block, and the movable block is installed in the connecting piece in a sliding mode. According to the drill bit, the fixed pull rod on the movable block is manually pulled, then the limiting rod is driven to be separated from the limiting hole in the limiting piece, the limiting piece is pulled out from the interior of the mounting hole, fixation of the drill bit body is relieved, the drill bit body can be conveniently detached from the connecting piece, replacement is convenient, and external tools are not needed for detachment.

Description

Technical Field

[0001] The utility model relates to a composite forming drill bit, in particular to a composite forming drill bit for processing blind holes, belonging to the technical field of drill bits. Background Art

[0002] The composite forming drill bit for processing blind holes is a special drill bit designed specifically for blind hole processing. It achieves one-time efficient and precise blind hole processing by combining multiple cutting edges and structural designs. The composite forming drill bit usually contains multiple cutting edges, such as spherical cutting edges, conical cutting edges, etc. The combination of these cutting edges can achieve one-time processing of complex shapes inside blind holes.

[0003] In the prior art, a composite tool for hole machining, such as that disclosed in Publication No. CN208895252U, comprises a drill head, a milling head connected to the drill head, a chamfering head connected to the milling head, and a shank connected to the chamfering head. The milling head is provided with a plurality of milling blades, with through slots between adjacent milling blades; the chamfering head is provided with a plurality of chamfering blades, with chip chambers between adjacent chamfering blades; and each through slot is connected to a corresponding chip chamber. By sequentially connecting the drill head, milling head, chamfering head, and shank, this tool integrates the functions of drilling, milling, and chamfering, enabling simultaneous drilling, milling, and chamfering. This significantly improves hole quality, increases machining efficiency, and significantly reduces tool costs.

[0004] Although the above technical solution integrates the functions of drilling, milling and chamfering by providing a drill head, a milling head, a chamfering head and a shank head connected in sequence, it is inconvenient to disassemble and assemble the drill bit during use. When processing blind holes of different apertures, the drill bit cannot be quickly disassembled and replaced, and its practicality is poor. In view of this, a composite molded drill bit for processing blind holes is provided to overcome the above defects. Utility Model Content

[0005] The utility model provides a composite molded drill bit for processing blind holes to solve the above-mentioned problems that it is inconvenient to disassemble and assemble the drill bit during use, and the drill bit cannot be quickly disassembled and replaced when processing blind holes with different apertures, resulting in poor practicality.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions: a composite molded drill bit for processing blind holes, comprising a drill bit body, one end of the drill bit body is connected to a connecting piece, and the outer surface of the connecting piece is provided with a limiting mechanism for limiting the drill bit;

[0007] The limiting mechanism includes a movable block, which is slidably installed inside the connecting piece. A fixed pull rod is fixed to the side wall of the movable block, a limiting rod is fixed to the lower surface of the movable block, and an installation hole is opened on the outer wall of the movable block. The interior of the installation hole is plugged into and connected to the limiting piece.

[0008] As a further solution of the present invention: the end of the limiting member is plug-connected with a fixing groove provided on the drill body, and the outer surface of the limiting member is provided with a limiting hole plug-connected with the limiting rod.

[0009] As a further solution of the present invention: sliders are fixed on both sides of the movable block, and the outer surfaces of the sliders are slidably connected to sliding grooves provided on the inner walls of the connecting piece.

[0010] As a further solution of the present invention: a movable tube is fixed to the upper end of the movable block.

[0011] As a further solution of the present invention: the interior of the movable tube is telescopically connected to a guide rod fixedly connected to the connecting piece.

[0012] As a further solution of the present invention: a spring is sleeved on the outer surface of the guide rod, and the spring is abutted against the movable tube.

[0013] As a further solution of the present invention: a chip removal groove is provided on the outer surface of the drill body, and a fixed handle is fixed to the upper end of the connecting piece.

[0014] The beneficial effect of the utility model is that by manually pulling the fixing rod on the movable block, the limiting rod and the limiting hole on the limiting part are separated, the limiting part is pulled out from the inside of the mounting hole, and the fixation of the drill body is released, and the drill body can be conveniently removed from the connecting part, thereby facilitating replacement, and no external tools are required for disassembly. By inserting the drill body into the connecting part, the fixing groove and the mounting hole are aligned, the limiting part is inserted into the fixing groove, and the fixing rod is released. During the process of the spring's self-resetting and extension, the limiting rod is pushed to be inserted into the limiting hole to limit the limiting part, thereby fixing the drill body. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the drill bit body of the utility model;

[0017] Figure 3 For this utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the connecting piece of the utility model.

[0019] In the figure: 1. Drill body; 2. Connecting part; 3. Movable block; 31. Fixed pull rod; 32. Limit rod; 33. Mounting hole; 34. Limiting part; 35. Fixed groove; 36. Limiting hole; 4. Slider; 5. Slide; 6. Movable tube; 7. Spring; 8. Guide rod; 9. Chip groove; 10. Fixed handle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0021] like Figures 1 to 4 As shown, a composite molded drill bit for machining blind holes includes a drill bit body 1, one end of the drill bit body 1 is connected to a connector 2, and the outer surface of the connector 2 is provided with a limiting mechanism for limiting the drill bit;

[0022] The limiting mechanism includes a movable block 3, which is slidably mounted inside the connecting member 2. A fixed pull rod 31 is fixed to the side wall of the movable block 3, and a limiting rod 32 is fixed to the lower surface of the movable block 3. A mounting hole 33 is provided on the outer wall of the movable block 3. The inner part of the mounting hole 33 is plugged and connected to a limiting member 34. The end of the limiting member 34 is plugged and connected to a fixing groove 35 provided on the drill body 1. A limiting hole 36 is provided on the outer surface of the limiting member 34 to be plugged and connected to the limiting rod 32. Sliders 4 are fixed on both sides of the movable block 3. The outer surface of the slider 4 is slidably connected to A sliding groove 5 is provided on the inner wall of the connecting member 2, and a movable tube 6 is fixed to the upper end of the movable block 3. The fixed pull rod 31 on the movable block 3 is manually pulled, thereby driving the limiting rod 32 and the limiting hole 36 on the limiting member 34 to separate, thereby releasing the fixation of the limiting member 34, and then pulling the limiting member 34 out from the inside of the mounting hole 33, so that the limiting member 34 and the fixing groove 35 on the drill body 1 are separated, thereby releasing the fixation of the drill body 1, and the drill body 1 can be easily removed from the connecting member 2, thereby facilitating replacement without the need to use external tools for disassembly. Example 2

[0023] The present embodiment includes all the technical features of the first embodiment, and further includes: the interior of the movable tube 6 is telescopically connected to a guide rod 8 fixedly connected to the connecting member 2; the outer surface of the guide rod 8 is sleeved with a spring 7, and the spring 7 is abutted against the movable tube 6; the outer surface of the drill body 1 is provided with a chip removal groove 9; the upper end of the connecting member 2 is fixed with a fixing handle 10; the drill body 1 is inserted into the connecting member 2 so that the fixing groove 35 and the mounting hole 33 are aligned, and then the fixing pull rod 31 on the movable block 3 is manually pulled so that the movable block 3 moves and drives the movable tube 6 to move, thereby compressing the spring 7; at this time, the limit member 34 is inserted into the fixing groove 35, and the fixing pull rod 31 is released. In the process of the spring 7 self-resetting and extending, the limit rod 32 is pushed to be inserted into the limit hole 36, limiting the limit member 34, and thus fixing the drill body 1; and the provided guide rod 8 can play a guiding role. With the cooperation of the slider 4 and the slide groove 5, the displacement of the movable block 3 during movement is effectively reduced, thereby improving stability.

[0024] Working principle: Before using the composite molded drill bit for processing blind holes, the fixing handle 10 and the output shaft of the driving device can be fixedly connected through the fixing handle 10 provided on the connecting member 2, and then the drill bit is fixed. When in use, the driving device drives the drill body 1 to rotate, and then the blind hole is processed. The waste chips generated by the processing can be discharged through the provided chip groove 9. When the drill bit needs to be replaced, the fixed pull rod 31 on the movable block 3 can be manually pulled to drive the limiting rod 32 and the limiting hole 36 on the limiting member 34 to separate, and the fixation of the limiting member 34 can be released. Then the limiting member 34 can be pulled out from the inside of the mounting hole 33, so that the limiting member 34 and the fixing groove 35 on the drill body 1 are separated, and the fixation of the drill body 1 can be released, and the drill body can be easily replaced. 1 is removed from the connecting piece 2, which is convenient for replacement and does not require the use of external tools for disassembly. When assembling the drill bit, first insert the drill bit body 1 into the connecting piece 2 so that the fixing groove 35 and the mounting hole 33 are aligned, and then manually pull the fixing pull rod 31 on the movable block 3, so that the movable block 3 moves and drives the movable tube 6 to move, thereby compressing the spring 7. At this time, the limit piece 34 is inserted into the fixing groove 35, and the fixing pull rod 31 is released. In the process of the spring 7 restoring and extending itself, the limit rod 32 is pushed to be inserted into the limit hole 36 to limit the limit piece 34, thereby fixing the drill bit body 1. The provided guide rod 8 can play a guiding role. With the cooperation of the slider 4 and the slide groove 5, the deviation of the movable block 3 during movement is effectively reduced, thereby improving stability.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A composite molded drill bit for machining blind holes, comprising a drill bit body (1), characterized in that: One end of the drill body (1) is connected to a connecting piece (2), and the outer surface of the connecting piece (2) is provided with a limiting mechanism for limiting the position of the drill; The limiting mechanism comprises a movable block (3), the movable block (3) being slidably mounted inside the connecting member (2), a fixed pull rod (31) being fixed to the side wall of the movable block (3), a limiting rod (32) being fixed to the lower surface of the movable block (3), an outer wall of the movable block (3) being provided with a mounting hole (33), and an inner portion of the mounting hole (33) being plugged and connected to a limiting member (34).

2. The composite forming drill bit for machining blind holes according to claim 1, characterized in that: The end of the limiting member (34) is plug-connected with a fixing groove (35) provided on the drill body (1), and the outer surface of the limiting member (34) is provided with a limiting hole (36) plug-connected with the limiting rod (32).

3. The composite molded drill bit for machining blind holes according to claim 1, characterized in that: Slide blocks (4) are fixed on both sides of the movable block (3), and the outer surface of the slide block (4) is slidably connected to a slide groove (5) provided on the inner wall of the connecting member (2).

4. The composite forming drill bit for machining blind holes according to claim 1, characterized in that: A movable tube (6) is fixed to the upper end of the movable block (3).

5. The composite forming drill bit for machining blind holes according to claim 4, characterized in that: The movable tube (6) is internally telescopically connected to a guide rod (8) fixedly connected to the connecting piece (2).

6. The composite forming drill bit for machining blind holes according to claim 5, characterized in that: The outer surface of the guide rod (8) is sleeved with a spring (7), and the spring (7) is abuttingly connected to the movable tube (6).

7. The composite molded drill bit for machining blind holes according to claim 1, characterized in that: The outer surface of the drill body (1) is provided with a chip removal groove (9), and the upper end of the connecting piece (2) is fixed with a fixed handle (10).

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