Quick-release type screw hole saw structure

Abstract

The utility model provides a quick disassembly type rotary hole saw structure, belongs to the technical field of drilling devices, and aims to solve the problems that an existing hole saw is not provided with a protection structure, splashed scrap iron can hurt hands of workers, and drilled wood plates or iron plates can be clamped in a female die at the front end of the hole saw and are not changed when being taken by the workers. Comprising a female die, sawteeth are evenly installed on the upper end surface of the female die, a connecting hole is fixedly formed in the middle of the bottom end surface of the female die, and four through holes are annularly formed in the surface of a bottom plate of the female die. Compared with the prior art, through the arrangement of the protective cover, drilled scrap iron can be intercepted, harm to workers caused by splashed scrap iron is avoided, through the arrangement of the compression spring fixedly installed on the lower end face of the ejection plate, under the action of the elastic force of the compression spring, an iron plate in the female die can be ejected out, and convenience is brought to machining of the workers.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling devices, and more specifically, it particularly relates to a quick-release hole saw structure. Background Technique

[0002] A hole saw is a special circular saw for sawing in engineering to process circular holes. The front end of the hole opener is a circular ring structure. When workers process circular holes of different sizes, they need to replace different female dies. However, there are still some areas for improvement in the current hole saw during processing.

[0003] Based on the above, the existing hole saws still have the following two deficiencies in use:

[0004] Firstly, the hole saw itself lacks a protective structure. When the hole saw drills a hole, some iron filings will fly out, which is likely to cause harm to the hands of workers.

[0005] Secondly, after the hole saw drills a hole, the drilled wooden board or iron plate will be stuck in the female die at the front end of the hole saw, which is inconvenient for workers to take. Content of the Utility Model

[0006] In order to solve the above technical problems, the utility model provides a quick-release hole saw structure to solve the problems that the existing hole saw itself lacks a protective structure, the flying iron filings will cause harm to the hands of workers, and the drilled wooden board or iron plate will be stuck in the female die at the front end of the hole saw, which is inconvenient for workers to take.

[0007] The purpose and effect of a quick-release hole saw structure of the utility model are achieved by the following specific technical means: A quick-release hole saw structure includes a female die;

[0008] Saw teeth are evenly installed on the upper surface of the female die. A connecting hole is fixedly installed in the middle position of the bottom surface of the female die. Four through holes are annularly formed on the bottom plate surface of the female die.

[0009] A center drill, a connecting rod is fixedly installed on the lower end surface of the center drill, and the center drill is located inside the female die;

[0010] A top plate, a through-shaped circular hole is formed in the middle position of the top plate, and the top plate is located inside the female die;

[0011] A connecting plate, the connecting plate is located directly below the female die. A through-shaped circular hole is formed in the middle position of the connecting plate. Four through holes are formed on the surface of the connecting plate, and the four through holes are arranged in an annular structure;

[0012] A locking nut, the locking nut is threadedly connected above the connecting rod.

[0013] Furthermore, a connection hole is provided at the middle position of the bottom plate surface of the female die. The inner diameter of the connection hole is the same as the outer diameter of the connecting rod. The connecting rod is clamped inside the connection hole, and the outer diameter of the connecting rod is smaller than the outer diameter of the center drill.

[0014] Furthermore, a thread is provided at the upper end portion of the connecting rod. The connecting rod is threadedly connected with a lock nut. Three notches are annularly provided at the lower end portion of the connecting rod.

[0015] Furthermore, the outer end surface of the ejector plate is attached to the inner end surface of the female die. A compression spring is fixedly installed on the lower end surface of the ejector plate, and the lower end of the compression spring is fixedly connected to the bottom plate of the female die.

[0016] Furthermore, four connecting screws are fixedly installed on the lower end surface of the female die. The four connecting screws are arranged in an annular structure, and the four connecting screws are respectively clamped in four through holes on the surface of the connecting plate.

[0017] Furthermore, a protective cover is fixedly installed on the lower end surface of the connecting plate. The main body of the protective cover is in an umbrella shape.

[0018] Furthermore, fixed blocking strips are evenly installed on the outer end surface of the lock nut. The outer end surface of the fixed blocking strip is in an arc shape.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] In the present utility model, the connecting rod at the lower end of the center drill is clamped in the connection hole on the bottom plate surface of the female die. Through the setting that the upper end portion of the connecting rod is provided with an external thread, workers can threadedly connect the lock nut to the outside of the connecting rod. After tightening the lock nut, the fixation of the center drill and the connecting rod can be realized, which is convenient for workers to disassemble and assemble.

[0021] In addition, four connecting screws are annularly installed on the lower end surface of the female die, and four through holes are provided on the surface of the connecting plate. Workers can clamp the connecting screws in the through holes on the surface of the connecting plate, and then tighten the nuts on the surface of the connecting screws to fix the connecting plate on the lower end surface of the female die.

[0022] In addition, a protective cover with an umbrella shape is fixedly installed on the lower end surface of the connecting plate. Through the setting of the protective cover, when the hole saw drills a hole, the iron chips drilled out can be intercepted, avoiding the iron chips flying out from causing harm to workers. At the same time, an ejector plate is provided inside the female die. After the drilling is completed, the iron plate or wooden board drilled out will be clamped inside the female die. Through the setting that a compression spring is fixedly installed on the lower end surface of the ejector plate, under the action of the elastic force of the compression spring, the iron plate inside the female die can be ejected, bringing convenience to the processing of workers. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the overall device of the present utility model.

[0024] Figure 2 It is a schematic sectional view of the female die of the present utility model.

[0025] Figure 3 It is a schematic structural diagram of the center drill, connecting rod and locking nut of the present utility model.

[0026] Figure 4 It is a schematic structural diagram of the female die of the present utility model.

[0027] Figure 5 It is a schematic structural diagram of the female die and the connecting plate of the present utility model.

[0028] Figure 6 It is a schematic structural diagram of the ejector plate and the compression spring of the present utility model.

[0029] In the figure, the corresponding relationship between the component names and the drawing numbers is as follows:

[0030] 1. Female die; 101. Through hole; 102. Connecting hole; 103. Saw teeth; 104. Connecting screw; 2. Center drill; 201. Connecting rod; 3. Ejector plate; 301. Compression spring; 4. Connecting plate; 401. Protective cover; 402. Through hole; 5. Locking nut; 501. Fixed stop bar. Specific implementation mode

[0031] The following further describes the implementation mode of the present utility model in detail with reference to the drawings and embodiments.

[0032] Embodiment 1:

[0033] As shown in Figure 1 to Figure 6 shown:

[0034] The present utility model provides a quick-release hole saw structure, including a female die 1;

[0035] Saw teeth 103 are evenly installed on the upper end surface of the female die 1, a connecting hole 102 is fixedly installed at the middle position of the bottom end surface of the female die 1, and four through holes 101 are annularly formed on the bottom plate surface of the female die 1;

[0036] A center drill 2, a connecting rod 201 is fixedly installed on the lower end surface of the center drill 2, and the center drill 2 is located inside the female die 1;

[0037] An ejector plate 3, a through-shaped round hole is formed in the middle position of the ejector plate 3, and the ejector plate 3 is located inside the female die 1;

[0038] Connecting plate 4 is located directly below the female die 1. A through circular hole is provided at the middle position of the connecting plate 4, and four through holes 402 are provided on the surface of the connecting plate 4. The four through holes 402 are arranged in an annular structure.

[0039] Locking nut 5 is threadedly connected above the connecting rod 201.

[0040] Among them, a connecting hole 102 is provided at the middle position of the bottom plate surface of the female die 1. The inner diameter of the connecting hole 102 is the same as the outer diameter of the connecting rod 201. The connecting rod 201 is clamped inside the connecting hole 102. The outer diameter of the connecting rod 201 is smaller than the outer diameter of the center drill 2. A thread is provided at the upper end portion of the connecting rod 201. The connecting rod 201 is threadedly connected with the locking nut 5. Three notches are annularly provided at the lower end portion of the connecting rod 201.

[0041] By adopting the above scheme, the technical effect brought is that the connecting rod 201 at the lower end of the center drill 2 is clamped in the connecting hole 102 on the bottom plate surface of the female die 1. The lower end surface of the center drill 2 is attached to the upper end surface of the bottom plate of the female die 1. Through the setting of the external thread provided at the upper end portion of the connecting rod 201, workers can threadedly connect the locking nut 5 to the outside of the connecting rod 201. After tightening the locking nut 5, the fixation of the center drill 2 and the connecting rod 201 can be realized, and the rapid installation of the hole saw by workers can be achieved.

[0042] Among them, the outer end surface of the ejector plate 3 is attached to the inner end surface of the female die 1. A compression spring 301 is fixedly installed on the lower end surface of the ejector plate 3. The lower end of the compression spring 301 is fixedly connected to the bottom plate of the female die 1. After drilling, the drilled iron plate or wooden board will be clamped inside the female die 1. Through the setting of the compression spring 301 fixedly installed on the lower end surface of the ejector plate 3, under the action of the elastic force of the compression spring 301, the iron plate inside the female die 1 can be ejected, which brings convenience to the processing of workers.

[0043] Among them, four connecting screws 104 are fixedly installed on the lower end surface of the female die 1. The four connecting screws 104 are arranged in an annular structure. The four connecting screws 104 are respectively clamped in the four through holes 402 on the surface of the connecting plate 4. Workers can clamp the connecting screws 104 in the through holes 402 on the surface of the connecting plate 4, and then tighten the nuts on the surface of the connecting screws 104 to fix the connecting plate 4 on the lower end surface of the female die 1.

[0044] Among them, a protective cover 401 is fixedly installed on the lower end surface of the connecting plate 4. The main body of the protective cover 401 is in an umbrella shape. An umbrella-shaped protective cover 401 is fixedly installed on the lower end surface of the connecting plate 4. Through the setting of the protective cover 401, when the hole saw drills a hole, the ejected iron chips can be intercepted, avoiding the iron chips splashing out from causing harm to workers.

[0045] Among them, fixed bars 501 are evenly installed on the outer end surface of the locking nut 5. The outer end surface of the fixed bar 501 is an arc-shaped structure. When a worker rotates the locking nut 5 with a tool, due to the arrangement of the fixed bar 501 at the outer end of the locking nut 5, the fixed bar 501 can protect the six end corners of the locking nut 5, avoiding wear on the end corners and preventing the locking nut 5 from slipping.

[0046] Specific usage method and function of this embodiment:

[0047] In this utility model, when installing the hole saw, the connecting rod 201 at the lower end of the center drill 2 can be clamped in the connecting hole 102 on the bottom plate surface of the female die 1. The lower end surface of the center drill 2 is attached to the upper end surface of the bottom plate of the female die 1. Due to the outer thread provided on the upper part of the connecting rod 201, the worker can thread the locking nut 5 onto the outside of the connecting rod 201. After tightening the locking nut 5, the fixation of the center drill 2 and the connecting rod 201 can be achieved. Four connecting screws 104 are annularly installed on the lower end surface of the female die 1. Four through holes 402 are provided on the surface of the connecting plate 4. The worker can clamp the connecting screws 104 in the through holes 402 on the surface of the connecting plate 4, and then tighten the nuts on the surface of the connecting screws 104 to fix the connecting plate 4 on the lower end surface of the female die 1. An umbrella-shaped protective cover 401 is fixedly installed on the lower end surface of the connecting plate 4. Due to the arrangement of the protective cover 401, when the hole saw drills a hole, the drilled iron filings can be intercepted, preventing the flying iron filings from harming the worker. At the same time, a ejector plate 3 is provided inside the female die 1. After the drilling is completed, the drilled iron plate or wooden board will be clamped inside the female die 1. Due to the arrangement of the compression spring 301 fixedly installed on the lower end surface of the ejector plate 3, under the action of the elastic force of the compression spring 301, the iron plate inside the female die 1 can be ejected, bringing convenience to the worker's processing.

Claims

1. A quick-release hole saw structure, characterized in that: It includes a female die (1). Sawteeth (103) are evenly installed on the upper end surface of the female die (1). A connection hole (102) is fixedly installed at the middle position of the bottom end surface of the female die (1). Four through holes (101) are annularly formed on the bottom plate surface of the female die (1); a center drill (2), a connecting rod (201) is fixedly installed on the lower end surface of the center drill (2), and the center drill (2) is located inside the female die (1); an ejector plate (3), a through circular hole is formed in the middle position of the ejector plate (3), and the ejector plate (3) is located inside the female die (1); a connecting plate (4), the connecting plate (4) is located directly below the female die (1), a through circular hole is formed in the middle position of the connecting plate (4), and four through holes (402) are formed on the surface of the connecting plate (4), and the four through holes (402) are arranged in an annular structure; a lock nut (5), the lock nut (5) is threadedly connected above the connecting rod (201).

2. The quick-release hole saw structure according to claim 1, wherein: A connection hole (102) is formed at the middle position of the bottom plate surface of the female die (1). The inner diameter of the connection hole (102) is the same as the outer diameter of the connecting rod (201). The connecting rod (201) is clamped inside the connection hole (102), and the outer diameter of the connecting rod (201) is smaller than the outer diameter of the center drill (2).

3. The quick-release hole saw structure according to claim 1, characterized in that: Threads are formed on the upper end portion of the connecting rod (201). The connecting rod (201) is threadedly connected with the lock nut (5). Three notches are annularly formed on the lower end portion of the connecting rod (201).

4. The quick-release hole saw structure according to claim 1, characterized in that: The outer end surface of the ejector plate (3) fits with the inner end surface of the female die (1). A compression spring (301) is fixedly installed on the lower end surface of the ejector plate (3), and the lower end of the compression spring (301) is fixedly connected to the bottom plate of the female die (1).

5. The quick-release hole saw structure according to claim 1, wherein: Four connecting screws (104) are fixedly installed on the lower end surface of the female die (1). The four connecting screws (104) are arranged in an annular structure, and the four connecting screws (104) are respectively clamped in the four through holes (402) on the surface of the connecting plate (4).

6. The quick-release hole saw structure according to claim 1, characterized in that: A protective cover (401) is fixedly installed on the lower end surface of the connecting plate (4). The main body of the protective cover (401) is in an umbrella shape structure.

7. The quick-release hole saw structure according to claim 1, characterized in that: Fixed retaining strips (501) are evenly installed on the outer end surface of the lock nut (5). The outer end surface of the fixed retaining strip (501) is in an arc structure.

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