Fastening structure for replaceable-head type drill bit

Abstract

The utility model discloses a fastening structure for a head-replaceable drill bit, which comprises a drill bit fixing casing, an opening is arranged on the lower portion of the drill bit fixing casing, a drill bit body penetrates through the opening, a drilling tool is arranged on the lower portion of the drill bit body, and the fastening structure further comprises a split limit seat unit. The split type limiting seat unit comprises a limiting hole formed in the upper portion of the drill bit body, a limiting shell is connected to the upper end of the drill bit body in an inserted mode, the lower end of the limiting shell penetrates through the limiting hole through a screwed limiting screw to be fixed to the drill bit body, and limiting grooves are formed in the two sides of the limiting shell. The utility model belongs to the technical field of drill bit equipment, and effectively solves the problems that a fastening structure for a drill bit lacks adjustability for installation of drill bits with different specifications and sizes, and a part structure is not easy to replace and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill bit equipment, in particular to a fastening structure for a replaceable head type drill bit. Background Art

[0002] A drill bit is a tool for machining holes or grooves in machining. The drill bits in the prior art are directly connected to the clamping part of the machine tool. When drilling holes in metal plates or workpieces, it is necessary to replace drill bits of different lengths according to the different thicknesses of metal plates or workpieces to adjust the vertical height of the drill bit. This requires workers to be equipped with drill bits of different lengths during processing. However, when the drill bit is fixedly installed, due to the unstable installation process, there is an installation offset between the installed drill bit and the drill bit fixing seat, which affects the drilling accuracy of the drill bit when it is used for drilling.

[0003] Publication (Announcement) No.: CN207824034U provides a drill bit fixing device to ensure the stability of the installation between the drill bit and the drill bit fixing seat, thereby improving the accuracy of the drill bit installation.

[0004] However, in the prior art, the drill bit is prone to significant wear after long-term use, and is inconvenient to replace, and drill bits of different specifications and sizes have poor installation adaptability. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the fastening structure for the drill bit lacks adjustability for installing drill bits of different specifications and sizes, and the component structure is not easy to replace and use.

[0006] The technical solution adopted by the utility model is as follows:

[0007] The utility model provides a fastening structure for a replaceable head drill, comprising a drill fixing housing, an opening is provided at the lower part of the drill fixing housing, a drill body penetrates the opening, a drill cutter is provided at the lower part of the drill body, and also comprises a split limit seat unit;

[0008] The split limit seat unit includes a limit hole opened on the upper part of the drill body, a limit shell is inserted into the upper end of the drill body, and the lower end of the limit shell is fixed to the drill body by a limit screw threaded through the limit hole, and limit grooves are opened on both sides of the limit shell.

[0009] Furthermore, limiting blocks matching with the limiting grooves are passed through both sides of the drill bit fixing housing.

[0010] Furthermore, a pull rod is fixedly connected to one side of the limit block, and an arc-shaped push block is fixedly connected to the other side of the limit block.

[0011] Furthermore, a chuck is fixedly connected to the pull rod, and a return spring is sleeved on the pull rod.

[0012] Furthermore, mounting frames are provided on the outside of both sides of the drill bit fixing housing, and the pull rod passes through the mounting frames.

[0013] Furthermore, a detachable connecting ear is fixedly connected to the mounting frame, and a fixing screw threadedly connected to the drill fixing housing passes through the detachable connecting ear.

[0014] The beneficial effects achieved by the utility model using the above structure are as follows:

[0015] 1. The spring mechanism is used on the limit mechanism to achieve quick limit installation and improve the use efficiency;

[0016] 2. Set up a component mechanism that is easy to disassemble and assemble, so as to facilitate the replacement and adaptation of drill bits of different specifications and reduce replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the installation structure of the limit block and the pull rod;

[0019] Figure 3 It is an exploded view of the installation structure of the limit housing;

[0020] Figure 4 This is a reference diagram of the usage status of the split limit seat unit.

[0021] Among them, 1. drill bit fixing housing; 2. drill bit body; 3. drill cutter; 4. limit hole; 5. limit housing; 6. limit groove; 7. limit block; 8. pull rod; 9. arc-shaped push block; 10. chuck; 11. reset spring; 12. detachable connecting ear; 13. fixing screw. DETAILED DESCRIPTION

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model proposes a fastening structure for a replaceable head drill, including a drill fixing housing 1, an opening is provided at the lower part of the drill fixing housing 1, a drill body 2 is penetrated through the opening, a drill cutter 3 is provided at the lower part of the drill body 2, and also includes a split limit seat unit; the split limit seat unit includes a limit hole 4 provided on the upper part of the drill body 2, a limit housing 5 is inserted into the upper end of the drill body 2, and the lower end of the limit housing 5 is fixed to the drill body 2 through the limit hole 4 by a screwed limit screw, and limit grooves 6 are provided on both sides of the limit housing 5; limit blocks 7 matching the limit grooves 6 are penetrated on both sides of the drill fixing housing 1.

[0023] A pull rod 8 is fixedly connected to one side of the limit block 7, and an arc-shaped push block 9 is fixedly connected to the other side of the limit block 7; a chuck 10 is fixedly connected to the pull rod 8, and a return spring 11 is sleeved on the pull rod 8;

[0024] It should be noted that the arc surface of the arc-shaped push block 9 faces downwards, which is convenient for adjustment and limiting.

[0025] Mounting frames are provided on the outside of both sides of the drill bit fixing housing 1, and the pull rod 8 passes through the mounting frames; the mounting frames are fixedly connected with detachable connecting ears 12, and the detachable connecting ears 12 pass through fixing screws 13 that are screwed on the drill bit fixing housing 1.

[0026] When the user installs the device, the limit housing 5 needs to be plugged into the drill body 2, and the limit screws installed on the limit housing 5 are used to penetrate the limit holes 4 to realize the installation combination of the limit housing 5 and the drill body 2, so that the directions of the limit grooves 6 on both sides are consistent with the limit blocks 7, and then the drill body 2 is installed from the bottom of the drill fixing housing 1, and the limit housing 5 passes through the opening at the bottom of the drill fixing housing 1 to enter the inside of the drill fixing housing 1;

[0027] During the movement, the arc surface of the arc-shaped push block 9 is downward, and the limit shell 5 squeezes the arc-shaped push block 9, so that the vertical force is converted into a horizontal force, pushing the limit block 7 and the pull rod 8 to move outward. After the limit shell 5 moves to the installation position, the limit groove 6 corresponds to the position of the arc-shaped push block 9. The arc-shaped push block 9, which has lost its resistance, pushes the chuck 10 and the pull rod 8 to move inward under the elastic potential energy of the reset spring 11, so that the arc-shaped push block 9 is automatically stuck in the limit groove 6;

[0028] The arc-shaped push block 9 and the limit block 7 can be removed from the limit groove 6 by pulling the pull rod 8 to replace the drill bit;

[0029] The chuck 10 serves as a fulcrum for the force of the reset spring 11, which facilitates the reset adjustment of the pull rod 8, and the detachable connecting ear 12 can be quickly disassembled by the fixing screw 13, which facilitates the replacement of the component structure;

[0030] Drill bits of different specifications (for example, the specifications of the drill bit 3 vary, but the drill bit body 2 remains the same, and the limit housing 5 is used as a standard part for installation) are connected and installed, so that the standard parts can be recycled, and it is also convenient for quick assembly and fastening, thereby reducing the cost of equipment replacement;

[0031] The above is the entire use process of the fastening structure for a replaceable head drill.

[0032] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A fastening structure for a replaceable head drill, comprising a drill fixing housing (1), the drill fixing housing (1) having an opening at the bottom, a drill body (2) passing through the opening, a drill cutter (3) at the bottom of the drill body (2), characterized in that: Also included is a split type limit seat unit; The split limit seat unit comprises a limit hole (4) formed on the upper part of the drill body (2); a limit housing (5) is inserted into the upper end of the drill body (2); and the lower end of the limit housing (5) is fixed to the drill body (2) by a limit screw threaded through the limit hole (4); and limit grooves (6) are formed on both sides of the limit housing (5).

2. The fastening structure for a replaceable head drill according to claim 1, characterized in that: Limit blocks (7) matching with the limit grooves (6) are passed through both sides of the drill bit fixing housing (1).

3. The fastening structure for a replaceable head drill according to claim 2, characterized in that: A pull rod (8) is fixedly connected to one side of the limit block (7), and an arc-shaped push block (9) is fixedly connected to the other side of the limit block (7).

4. The fastening structure for a replaceable head drill according to claim 3, characterized in that: A chuck (10) is fixedly connected to the pull rod (8), and a return spring (11) is sleeved on the pull rod (8).

5. The fastening structure for a replaceable head drill according to claim 4, characterized in that: Mounting frames are provided on the outside of both sides of the drill bit fixing housing (1), and the pull rod (8) passes through the mounting frames.

6. The fastening structure for a replaceable head drill according to claim 5, characterized in that: A detachable connecting ear (12) is fixedly connected to the mounting frame, and a fixing screw (13) which is screwed to the drill fixing housing (1) passes through the detachable connecting ear (12).

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