A hollow drill for fast drilling
By introducing a clamping mechanism and toothed plate structure into the hollow drill, the problem of removing thick wooden core blocks has been solved, enabling rapid drilling and efficient core block collection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGZHOU KEDI ELECTROMECHANICAL MFG CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-19
AI Technical Summary
When drilling wood, thick wood core blocks are difficult to remove from the hollow drill, affecting subsequent use.
A hollow drill including a clamping mechanism was designed. The toothed plate is inserted into the core block for fixation when the drill bit rotates in the opposite direction. The cooperation structure between the clamping block and the toothed plate ensures that the core block can be smoothly released from the drill bit, and the core block is collected by a pick plate.
This improved drilling efficiency, ensured smooth core removal, avoided operational difficulties, and increased production efficiency.
Smart Images
Figure CN224374336U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wood processing technology, specifically a hollow drill for rapid drilling. Background Technology
[0002] A hollow drill is a multi-bladed annular cutting tool that increases drilling speed by cutting only the outer diameter annular area of the hole, thus avoiding ineffective cutting of the central core. It is used in a variety of materials such as concrete, steel structures, stone, tiles, and wood. In the production of wooden products, it is often necessary to make through holes in wooden strips or thick boards to install fasteners.
[0003] When using a hollow drill to drill holes in wood, a ejector spring is usually fitted onto the center of the drill bit to facilitate the removal of the core block. This spring causes the drill bit to reverse after drilling, allowing the wooden core block to detach from the drill bit. However, when the wooden core block is thick, the large contact area between it and the hollow drill makes the frictional force between them easily exceed the elastic force provided by the spring. As a result, only a portion of the bottom of the wooden core block protrudes from the hollow drill, making it difficult for the operator to remove the core block and affecting subsequent use. Utility Model Content
[0004] The purpose of this invention is to provide a hollow drill for rapid drilling, thereby addressing the shortcomings of the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a hollow drill for rapid drilling, comprising a drilling mechanism, wherein a drill bit is mounted on the drilling mechanism, and a support base, wherein a through hole is formed on the support base directly below the drill bit, and further comprising:
[0006] The front side of the carrier base is an open side;
[0007] A clamping mechanism includes symmetrical first slide rails fixedly connected inside a base. Clamping blocks are slidably connected to opposite sides of the two first slide rails. The opposite sides of the two clamping blocks are inclined surfaces. Each clamping block is hollow and has a toothed plate slidably connected inside. The teeth of the toothed plate are located on its outer surface. A carriage is fixedly connected to the inner surface of the toothed plate. A through-feature first slide groove is formed on the side of the carriage. L-shaped slide grooves are formed on the upper and lower sides of the clamping blocks. A limiting slider is fixedly connected to the inner surface of the toothed plate and slidably connected within the L-shaped slide groove. A guide post with one end located within the first slide groove is fixed inside the clamping block. A spring is sleeved on the guide post. A limiting slide groove is formed inside the clamping block. After the limiting slider is embedded in the limiting slide groove, the toothed plate cannot slide further into the clamping block.
[0008] Preferably, the closer the inclined surface of the gripping block is to the front side of the load base, the greater the distance between it and the inclined surface of the other gripping block.
[0009] Preferably, the limiting slider is located at the right-angle turn of the L-groove in the initial state, and a section of the L-groove is parallel to the inclined surface of the clamping block, and the parallel section communicates with the limiting groove.
[0010] Preferably, the toothed plate has a circular hole on its side that communicates with the first sliding groove, and the guide post passes through the circular hole when the toothed plate moves into the clamping block.
[0011] Preferably, the teeth of the toothed plate are curved teeth, and the teeth of the toothed plates on both sides are in opposite directions.
[0012] Preferably, a receiving plate is slidably connected inside the base, and a lever is fixedly connected to the top surface of the receiving plate.
[0013] Preferably, the lever is located on the side of the receiving plate away from the front side of the load base, and the top surface of the lever is higher than the top surface of the gripping block.
[0014] Preferably, the first slide rail is an adjustable damping slide rail, and its damping magnitude is matched with the rotational speed of the drill bit.
[0015] In the above technical solution, the hollow drill provided by this utility model for rapid drilling allows the core block inside the drill bit to be pushed outward by the ejector spring inside the drill bit after the drill bit has finished rotating and cutting, thereby extending between the two clamping blocks. As the drill bit rotates in the reverse direction during its return stroke, the teeth on the tooth plate will insert into the core block, thereby fixing the core block. At this time, the return stroke of the drill bit will cause the core block to disengage from it, so that the drill bit can directly continue to cut and drill, thus improving production efficiency. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the internal structure of the base of this utility model;
[0019] Figure 3 This is a schematic diagram of the clamping mechanism of this utility model.
[0020] Figure 4 This is a schematic diagram of the clamping mechanism of this utility model from another perspective.
[0021] Figure 5 For the present utility model Figure 4 Enlarged view of point A in the middle.
[0022] Explanation of reference numerals in the attached drawings: 1. Drilling mechanism; 2. Drill bit; 3. Load base; 31. Through hole; 4. Clamping mechanism; 41. First slide rail; 42. Clamping block; 43. Toothed plate; 44. Slide carriage; 45. L-shaped slide groove; 46. Limiting slider; 47. Spring; 48. Limiting slide groove; 49. First slide groove; 410. Guide post; 5. Receiving plate; 51. Pulley. Detailed Implementation
[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0024] like Figures 1 to 5 As shown, a hollow drill for rapid drilling in this embodiment includes a drilling mechanism 1, on which a drill bit 2 is mounted, and a support base 3. The support base 3 has a through hole 31 located directly below the drill bit 2, and also includes:
[0025] The front side of the base 3 is an open side;
[0026] The clamping mechanism 4 includes symmetrical first slide rails 41 fixedly connected inside the base 3. Clamping blocks 42 are slidably connected to opposite sides of the two first slide rails 41. The opposite sides of the two clamping blocks 42 are inclined surfaces. Each clamping block 42 is hollow and has a toothed plate 43 slidably connected inside. The teeth of the toothed plate 43 are located on its outer side. A carriage 44 is fixedly connected to the inner side of the toothed plate 43. A through first groove 4 is formed on the side of the carriage 44. 9. The upper and lower sides of the gripping block 42 are provided with L-shaped grooves 45. The inner side of the toothed plate 43 is fixedly connected to a limiting slider 46. The limiting slider 46 is slidably connected in the L-shaped groove 45. A guide post 410 with one end located in the first groove 49 is fixed inside the gripping block 42. A spring 47 is sleeved on the guide post 410. The inside of the gripping block 42 is provided with a limiting groove 48. After the limiting slider 46 is embedded in the limiting groove 48, the toothed plate 43 cannot slide into the inside of the gripping block 42.
[0027] In this embodiment, only one side of the clamping block 42 is provided with a toothed plate 43. After the drill bit 2 completes the rotational cutting, the core block inside the drill bit 2 is pushed outward by the ejector spring inside the drill bit 2, thereby extending between the two clamping blocks 42. As the drill bit 2 rotates in the reverse direction during its return stroke, the teeth on the toothed plate 43 will insert into the core block, thereby fixing the core block. At this time, the return stroke of the drill bit 2 will cause the core block to disengage from it, so that the drill bit 2 can directly continue to cut and drill, thus improving production efficiency.
[0028] When the core block is removed from the drill bit 2, it is inserted into the toothed plate 43. By pulling out the receiving plate 5, the push plate 51 will contact the core block, thereby pushing the core block off the toothed plate 43, which facilitates the collection of the core block and allows the clamping mechanism 4 to immediately participate in the subsequent production process.
[0029] The closer the inclined surface of the gripping block 42 is to the front side of the load base 3, the greater the distance between it and the inclined surface of the other gripping block 42.
[0030] like Figure 2 As shown, the distance between the two gripping blocks 42 and their opposite sides decreases as the distance from the open side of the base 3 increases. This means that when handling core blocks of different diameters, only the gripping blocks 42 need to be pulled to move them, which will allow the toothed plate 43 to contact the core block, thereby improving the applicability of the device.
[0031] In the initial state, the limiting slider 46 is located at the right-angle turn of the L-slide 45. One section of the L-slide 45 is parallel to the inclined surface of the clamping block 42, and this parallel section is connected to the limiting slide 48.
[0032] like Figure 3 As shown, when the limiting slider 46 is at a right-angle turn, the toothed plate 43 can slide into the clamping block 42 and slide along the inclined surface of the clamping block 42. This allows the toothed plate 43 to avoid the drill bit 2 when the drill bit 2 is rotating in the forward direction. At the same time, when the drill bit 2 stops rotating and rotates in the reverse direction, the teeth of the toothed plate 43 are inserted into the core block and then slide along the inclined surface to prevent the toothed plate 43 from sliding into the clamping block 42 and disengaging from the core block, thus ensuring the biting effect of the toothed plate 43 on the core block.
[0033] The toothed plate 43 has a circular hole on its side that communicates with the first sliding groove 49. When the toothed plate 43 moves into the clamping block 42, the guide post 410 passes through the circular hole.
[0034] like Figure 4As shown, through the set circular hole and the first sliding groove 49, after the toothed plate 43 slides along the inclined surface of the clamping block 42, the guide post 410 abuts against it from the inside of the toothed plate 43, preventing the toothed plate 43 from sliding into the clamping block 42 when it bites the core block, and further improving the stability of the toothed plate 43 during operation.
[0035] Among them, the teeth of the tooth plate 43 are curved teeth, and the teeth of the tooth plates 43 on both sides are in opposite directions.
[0036] When the drill bit 2 rotates in the forward direction, the teeth of the toothed plate 43 are slightly pushed into the clamping block 42, thus preventing the front end of the teeth from contacting the outside of the drill bit 2. As the drilling mechanism 1 stops working, the core block inside the drill bit 2 is partially ejected outward by the ejection spring inside the drill bit 2. As the drilling mechanism 1 drives the drill bit 2 to move upward and reverse, the teeth on the toothed plate 43 will insert into the side of the core block and be driven to slide to the outermost side. Then, driven by the rotation of the drill bit 2, the limiting slider 46 is embedded in the limiting groove 48, so that the toothed plate 43 can no longer slide into the clamping block 42, ensuring the fixing effect of the core block.
[0037] The receiving plate 5 is slidably connected inside the base 3, and the top surface of the receiving plate 5 is fixedly connected to the lever 51; the lever 51 is located on the side of the receiving plate 5 away from the front side of the base 3, and the top surface of the lever 51 is higher than the top surface of the clamping block 42.
[0038] By pulling the receiving plate 5 outward, the pusher plate 51 will push the core block off the toothed plate 43 after contacting the core block, so that the core block falls onto the receiving plate 5, making it easy to remove the core block.
[0039] Among them, the first slide rail 41 is an adjustable damping slide rail, and its damping magnitude is matched with the rotational speed of the drill bit 2.
[0040] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A hollow drill for fast drilling, comprising a drilling mechanism (1) which is installed with a drill bit (2), and further comprising a carrier base (3) which is provided with a through hole (31) right below the drill bit (2), characterized in that, Also includes: The front side of the base (3) is an open side; The clamping mechanism (4) includes symmetrical first slide rails (41) fixedly connected inside the base (3). Clamping blocks (42) are slidably connected to the opposite sides of the two first slide rails (41). The opposite sides of the two clamping blocks (42) are inclined surfaces. Each clamping block (42) is hollow and has a toothed plate (43) slidably connected inside. The teeth of the toothed plate (43) are located on the outer side of the toothed plate (43). A carriage (44) is fixedly connected to the inner side of the toothed plate (43). A through first groove (49) is provided on the side of the carriage (44). The upper and lower sides of the grab block (42) are provided with L-shaped grooves (45). The inner side of the toothed plate (43) is fixedly connected to a limiting slider (46). The limiting slider (46) is slidably connected in the L-shaped groove (45). A guide post (410) with one end located in the first groove (49) is fixed in the grab block (42). A spring (47) is sleeved on the guide post (410). The inside of the grab block (42) is provided with a limiting groove (48). After the limiting slider (46) is embedded in the limiting groove (48), the toothed plate (43) cannot slide into the inside of the grab block (42).
2. A hollow drill for fast drilling according to claim 1, characterized in that The closer the inclined surface of the gripping block (42) is to the front side of the load base (3), the greater the distance between it and the inclined surface of the other gripping block (42).
3. A hollow drill for fast drilling according to claim 1, characterized in that, The limiting slider (46) is located at the right-angle turn of the L-slide (45) in the initial state. One section of the L-slide (45) is parallel to the inclined surface of the clamping block (42), and the parallel section is connected to the limiting slide (48).
4. A hollow drill for fast drilling according to claim 1, characterized in that, The toothed plate (43) has a circular hole on its side that communicates with the first sliding groove (49). When the toothed plate (43) moves into the clamping block (42), the guide post (410) passes through the circular hole.
5. A hollow drill for fast drilling according to claim 1, characterized in that, The teeth of the toothed plate (43) are curved teeth, and the teeth of the toothed plates (43) on both sides are in opposite directions.
6. A hollow drill for rapid drilling according to claim 1, characterized in that, The material receiving plate (5) is slidably connected inside the material base (3), and the top surface of the material receiving plate (5) is fixedly connected to the lever plate (51).
7. A hollow drill for rapid drilling according to claim 6, characterized in that, The lever (51) is located on the side of the receiving plate (5) away from the front side of the load base (3), and the top surface of the lever (51) is higher than the top surface of the clamping block (42).
8. A hollow drill for rapid drilling according to claim 1, characterized in that, The first slide rail (41) is an adjustable damping slide rail, and its damping magnitude is matched with the rotational speed of the drill bit (2).