Straight blade drilling device accurate in positioning

Abstract

The utility model discloses a straight blade drilling device with accurate positioning, which comprises a cutter handle, a mounting seat, a connecting sleeve, a connecting seat and a cutting tool bit which are sequentially connected from top to bottom, the cutting tool bit comprises a plurality of cutting units which are symmetrically arranged by taking the center as a symmetry center, and a threaded column is arranged on one side of the cutting tool bit; a plurality of embedding grooves corresponding to the cutting units are formed in the connecting base, a through hole corresponding to the threaded column is formed in the middle of the connecting base, and the threaded column penetrates through the through hole and is in threaded connection with the connecting sleeve; and chip grooves are correspondingly formed between the adjacent embedding grooves and between the adjacent cutting units. The cutting tool bit is quickly pre-positioned through the embedding groove of the connecting seat, and the connecting seat and the cutting tool bit are fixedly assembled through the connecting sleeve and the threaded column, so that the positioning and mounting accuracy of the cutting tool bit is improved, the use strength of processing is ensured, the stability of batch production is ensured, and the cutting tool bit has better practicability.

Description

Technical Field

[0001] This utility model belongs to the technical field of hole openers, specifically relating to a precise positioning straight-blade drilling device. Background Technology

[0002] Currently, drill bits for woodworking hole openers mainly include one-piece and welded structures. The one-piece drill bit is machined from a single piece of hard metal, resulting in higher processing costs. For example... Figure 1 As shown, commercially available hole saws typically use a welded connection between the blade body and the chip removal groove. However, during the welding process, positioning is difficult, making it hard to ensure consistent welding standards across batches. Furthermore, when drilling into wood, the rough hole walls and high cutting resistance can easily cause the blade to burn out, resulting in chipped edges on the processed material and consequently, a generally short tool life. Therefore, this invention provides a novel straight-blade hole saw with a positioning function. This effectively reduces the reliance on skilled personnel and other auxiliary equipment during the welding process, while still meeting welding requirements, thereby improving welding efficiency and reducing processing costs. Utility Model Content

[0003] The purpose of this utility model is to provide a precise positioning straight-blade drilling device. The cutting head can be quickly positioned and fixed by connecting the connecting seat and connecting sleeve, and the quick connection between the connecting sleeve and the mounting seat improves the installation efficiency and has good practicality.

[0004] This utility model is mainly achieved through the following technical solutions:

[0005] A precise positioning straight-blade drilling device includes a tool holder, a mounting base, a connecting sleeve, a connecting seat, and a cutting head connected sequentially from top to bottom. The cutting head includes a plurality of cutting units symmetrically arranged around a central point, and a threaded post is provided on one side of the cutting head. The connecting seat has a plurality of embedding slots corresponding to the plurality of cutting units, and a through hole is provided in the middle of the connecting seat corresponding to the threaded post. The threaded post passes through the through hole and is threadedly connected to the connecting sleeve. Chip removal grooves are respectively provided between adjacent embedding slots and between adjacent cutting units.

[0006] To better realize this utility model, the connecting seat further includes a plurality of positioning supports symmetrically arranged with the center as the center of symmetry. One side of the positioning support is provided with an embedding groove corresponding to the cutting unit, and the other side is provided with a rear corner clearance position connected to the chip removal groove.

[0007] To better realize this utility model, the cutting head further includes three cutting units symmetrically arranged with the center as the center; one side of the cutting unit is provided with a main cutting edge along the length direction, and the outer side is provided with an arc scribing edge along the circumferential direction.

[0008] To better realize this utility model, a positioning tip is further provided on the other side of the cutting head.

[0009] To better realize this utility model, the mounting base is further provided with a sliding cavity in the middle, the connecting sleeve is slidably connected to the sliding cavity, and a spring is provided between the connecting sleeve and the sliding cavity.

[0010] To better realize this utility model, furthermore, sliding protrusions are elastically provided on both sides of the connecting sleeve, and sliding grooves are correspondingly provided on both sides of the inner side of the sliding cavity.

[0011] To better realize this utility model, the connecting sleeve is further provided with locking grooves on both sides, the sliding protrusion is slidably connected with the locking groove, and a spring is provided between the sliding protrusion and the locking groove.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention uses the embedded groove of the connecting seat to quickly pre-position the cutting head, and uses the connecting sleeve and threaded post to fix and assemble the connecting seat and the cutting head, which improves the accuracy of the cutting head positioning and installation and ensures the strength of the processing. Then, the drilling device is quickly assembled by connecting the connecting sleeve and the mounting seat, and the spring setting improves the stability of the processing and reduces the generation of burrs, which has good practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an existing straight-blade drilling device;

[0015] Figure 2 This is a structural schematic diagram of the straight-blade drilling device for rapid positioning according to the present invention;

[0016] Figure 3 This is a schematic diagram of the cutting unit structure;

[0017] Figure 4 This is a schematic diagram of the connection structure between the cutting unit and the threaded column;

[0018] Figure 5 This is a schematic diagram of the connector structure;

[0019] Figure 6 This is a schematic diagram of the connecting sleeve and the connecting seat.

[0020] Wherein: 1-tool holder, 2-mounting base, 3-connecting sleeve, 4-cutting head, 5-threading post, 6-cutting unit, 7-positioning tip, 8-circular scribing edge, 9-main cutting edge, 10-connecting base, 11-back angle clearance, 12-embedded groove. Detailed Implementation

[0021] Example 1:

[0022] A precise positioning straight-blade drilling device, such as Figure 2 As shown, the device includes a tool holder 1, a mounting base 2, a connecting sleeve 3, a connecting seat 10, and a cutting head 4. The tool holder 1 has a mounting base 2 at its end, and the connecting sleeve 3 is mounted on the mounting base 2. The connecting seat 10 engages with one side of the cutting head 4, and a threaded post 5 is provided on one side of the cutting head 4. A through hole is correspondingly provided in the middle of the connecting seat 10, and the threaded post 5 passes through the through hole and is threadedly connected to the connecting sleeve 3. Specifically, the cutting head 4 includes several symmetrically arranged cutting units 6. One side of each cutting unit 6 has a main cutting edge 9 extending beyond its outer diameter along the direction of its diameter and the adjacent outer perimeter, and an arc-shaped scribing edge 8 higher than the main cutting edge 9 is provided at its outer end. A positioning tip 7 is provided on the other side of the cutting head 4. The connecting seat 10 includes several positioning supports. One side of each positioning support has an embedding groove 12 corresponding to the cutting unit 6, and the other side has a rear corner clearance 11 connected to the chip removal groove. Chip removal grooves are provided between adjacent embedding grooves 12 and adjacent cutting units 6.

[0023] In use, the threaded post 5 on one side of the cutting head 4 is first passed through the through hole, and the cutting unit 6 is simultaneously engaged with the embedding groove 12. Then, the connecting sleeve 3 is fitted onto the outside of the threaded post 5, and the cutting unit 6 and the connecting seat 10 are fixedly connected by the connecting sleeve 3. Finally, the connecting sleeve 3 is installed into the mounting base 2, thereby realizing the overall installation of the cutting unit 6 and the connecting seat 10 into the handle 1 for convenient subsequent use.

[0024] Example 2:

[0025] A precise positioning straight-blade drilling device, such as Figures 2-6 As shown, the device includes a cutting head 4, a connecting sleeve 3, and a connecting seat 10. The cutting head 4 is engaged with the connecting seat 10. A threaded post 5 is provided on one side of the cutting head 4. The threaded post 5 passes through the connecting seat 10 and is threadedly connected to the connecting sleeve 3. A mounting base 2 is provided at one end of the handle 1. A sliding cavity is provided in the middle of the mounting base 2. The connecting sleeve 3 is slidably connected to the sliding cavity, and a spring is provided between the connecting sleeve 3 and the sliding cavity.

[0026] Specifically, the cutting head 4 includes several symmetrically arranged cutting units 6. One side of each cutting unit 6 has a main cutting edge 9 extending beyond its outer diameter along the direction of its diameter and the adjacent outer perimeter, and an arc-shaped scribing edge 8 higher than the main cutting edge 9 is provided at its outer end. A positioning tip 7 is provided on the other side of the cutting head 4. The connecting seat 10 includes several positioning supports. One side of each positioning support has an embedding groove 12 corresponding to the cutting unit 6, and the other side has a rear corner clearance 11 connected to the chip removal groove. Chip removal grooves are provided between adjacent embedding grooves 12 and adjacent cutting units 6.

[0027] Preferably, sliding protrusions are elastically provided on both sides of the connecting sleeve 3, and corresponding sliding grooves are provided on both sides of the sliding cavity. Specifically, locking grooves are provided on both sides of the connecting sleeve 3, the sliding protrusions are slidably connected to the locking grooves, and a spring is provided between the sliding protrusions and the locking grooves.

[0028] In use, this invention first inserts the threaded post 5 on one side of the cutting head 4 through the through hole, and simultaneously engages the cutting unit 6 with the embedding groove 12. Then, the connecting sleeve 3 is fitted onto the outside of the threaded post 5, and the cutting unit 6 is fixedly connected to the connecting seat 10 via the connecting sleeve 3. Finally, the connecting sleeve 3 is installed into the mounting base 2, thus integrating the cutting unit 6 and the connecting base 10 into the tool holder 1 for convenient subsequent use. This invention quickly positions the cutting head 4 using the embedding groove 12 of the connecting base 10, and fixes the connecting base 10 and the cutting head 4 together via the connecting sleeve 3 and the threaded post 5, improving the accuracy of the cutting head 4's positioning and installation, and ensuring the strength of the machining process. Furthermore, the connection between the connecting sleeve 3 and the mounting base 2 quickly assembles the drilling device, and the spring mechanism improves machining stability and reduces burr generation, demonstrating good practicality.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A straight blade drilling device with accurate positioning, characterized in that, The utility model relates to a cutting tool, including the knife handle (1) that connects in turn from top to bottom, mounting seat (2), connecting sleeve (3), connecting seat (10) and cutting tool bit (4), the cutting tool bit (4) includes a plurality of cutting units (6) with center as the symmetric center symmetric setting, one side of cutting tool bit (4) is provided with threaded column (5), connecting seat (10) is provided with a plurality of embedding slot (12) with a plurality of cutting units (6) correspondingly, and the middle part of connecting seat (10) is provided with through -hole with threaded column (5) correspondingly, threaded column (5) passes through through -hole and is connected with connecting sleeve (3) threadedly, and the embedding slot (12) between adjacent and the cutting unit (6) between adjacent cutting unit (6) is set up with the chip flute correspondingly respectively.

2. The straight edge drilling device of claim 1, wherein, The connecting seat (10) includes a plurality of positioning supports symmetrically arranged with the center as the symmetric center, one side of the positioning support is provided with an embedding slot (12) corresponding to the cutting unit (6), and the other side is provided with a relief angle avoidance position (11) corresponding to the chip flute.

3. The straight edge drilling device of claim 2, wherein, The cutting tool bit (4) includes three cutting units (6) symmetrically arranged with the center as the symmetric center; one side of the cutting unit (6) is provided with a main cutting edge (9) along the length direction, and the outer side is provided with a circular arc scribe edge (8) along the circumference.

4. The straight edge drilling device of claim 3, wherein, The other side of the cutting tool bit (4) is provided with a positioning tip (7).

5. A straight edge drilling device according to any one of claims 1 to 4, wherein, The middle part of the mounting seat (2) is provided with a sliding cavity, the connecting sleeve (3) is in sliding connection with the sliding cavity, and a spring is arranged between the connecting sleeve (3) and the sliding cavity.

6. A straight edge drilling device according to claim 5, wherein, Both sides of the connecting sleeve (3) are respectively provided with sliding protrusions, and both sides of the inside of the sliding cavity are respectively provided with sliding grooves.

7. A straight edge drilling device according to claim 6, wherein, Both sides of the connecting sleeve (3) are respectively provided with locking grooves, the sliding protrusions are in sliding connection with the locking grooves, and a spring is arranged between the sliding protrusions and the locking grooves.

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