A drill bit replaceable taper shank twist drill

Abstract

This utility model relates to the field of tapered shank twist drill technology, specifically to a replaceable tapered shank twist drill. It includes a connecting tapered shank, a tensioning device, a mounting platform, a twist drill, and a connecting device. The connecting device includes a convex block, a spline rod, a limiting plate, a threaded sleeve, and an anti-loosening block. Each connecting tapered shank has a different Morse taper, facilitating installation and mating with the inner tapered hole of the spindle. In this application, the twist drill connects to the mounting platform of the connecting tapered shank via a structure consisting of a convex block, spline rod, limiting plate, threaded sleeve, and anti-loosening block, allowing for a detachable connection. Subsequently, the anti-loosening block, threaded sleeve, and spline rod can be removed sequentially to separate the connecting tapered shank from the twist drill, and different taper sizes can be directly replaced. This solves the problem that most existing tapered shank twist drills are of an integrated structure, making it difficult for operators to replace different models of tapered shanks, resulting in inconvenience.

Description

Technical Field

[0001] This utility model relates to the field of tapered shank twist drill technology, and in particular to a tapered shank twist drill with replaceable drill bit. Background Technology

[0002] Ordinary twist drills are the most commonly used hole-making tools. These drills have a relatively long straight main cutting edge, with the two main cutting edges connected by a chisel edge. The chip flutes are helical. Tapered shank twist drills, on the other hand, mainly consist of a working part and a shank. They typically have a diameter ranging from 0.25 to 80 mm. Their working part has two helical grooves, resembling a twisted structure. Unlike straight shank twist drills, tapered shank twist drills have a tapered shank. Different specifications of twist drills have different Morse tapers.

[0003] Although various types of taper shank twist drills with different structures are currently available on the market, most existing taper shank twist drills are of a single, integrated design, which makes it difficult for operators to change to different taper shank models as needed, resulting in inconvenience. Utility Model Content

[0004] The purpose of this utility model is to provide a replaceable taper shank twist drill, which aims to solve the problem that most existing taper shank twist drills have an integrated structure, making it impossible for operators to replace different models of taper shanks as needed, resulting in inconvenience in use.

[0005] To achieve the above objectives, this utility model provides a replaceable taper shank twist drill, including a connecting taper shank, a tensioning device at the top of the connecting taper shank, and an integrally formed mounting platform at the bottom. A twist drill is detachably connected to the bottom of the mounting platform via a connecting device, and a drill bit is provided at the top of the twist drill.

[0006] The connecting device includes a convex block, a spline rod, a limiting plate, a threaded sleeve, and an anti-loosening block. The convex block is integrally disposed on the end of the twist drill away from the drill bit and is symmetrically arranged, and can be installed and engaged with the mating cavity on the mounting platform. The spline rod passes through the twist drill and the mounting platform respectively, and the limiting plate is integrally disposed on one end. The limiting plate is slidably connected to the mounting platform. The threaded sleeve is threadedly connected to the spline rod and abuts against the mounting platform, and is located on the side of the spline rod away from the limiting plate. The anti-loosening block is threadedly connected to the mounting platform and abuts against the threaded sleeve.

[0007] The tensioning device includes a threaded rod and an abutment plate. The threaded rod is threadedly connected to the connecting cone shank, and the abutment plate is integrally provided on the top.

[0008] The helix angle of the twist drill is 25°.

[0009] Sealing gaskets may be provided on the side of the limiting plate and the threaded sleeve that abuts against the inner end face of the stepped cavity of the mounting platform.

[0010] The mounting platform is also provided with a retaining spring groove, which is close to the anti-loosening block. A retaining spring is installed in the groove and abuts against the surface of the anti-loosening block after installation.

[0011] This utility model discloses a replaceable taper shank twist drill. Firstly, each connecting taper shank has a different Morse taper, facilitating installation and mating with the inner taper hole of the spindle. In this application, the twist drill connects to the mounting platform of the connecting taper shank via a structure consisting of a convex block, spline rod, limiting plate, threaded sleeve, and anti-loosening block, enabling a detachable connection. Subsequently, the connecting taper shank and twist drill can be separated simply by sequentially removing the anti-loosening block, threaded sleeve, and spline rod. Different taper shanks can then be directly replaced for use. This solves the problem that most existing taper shank twist drills have an integrated structure, making it inconvenient for operators to replace different taper shank models as needed. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of the replaceable taper shank twist drill according to the first embodiment of this utility model.

[0014] Figure 2 This is a schematic diagram of the spline rod according to the first embodiment of this utility model.

[0015] Figure 3 This is a cross-sectional view of the threaded sleeve according to the first embodiment of this utility model.

[0016] Figure 4 This is a schematic diagram of the overall structure of the replaceable taper shank twist drill according to the second embodiment of this utility model.

[0017] Figure 5 This is the second embodiment of the present utility model. Figure 4 Enlarged view of point A in the middle.

[0018] In the diagram: 101-Connecting cone shank, 102-Mounting platform, 103-Twist drill, 104-Convex block, 105-Spline rod, 106-Limiting plate, 107-Threaded sleeve, 108-Anti-loosening block, 109-Threaded tie rod, 110-Abutting plate, 201-Snap ring. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Example 1:

[0021] like Figures 1 to 3 As shown, where Figure 1 This is a schematic diagram of the overall structure of a replaceable taper shank twist drill. Figure 2 This is a structural schematic diagram of spline rod 105. Figure 3 This is a cross-sectional view of the threaded sleeve 107. This utility model provides a replaceable taper shank twist drill: it includes a connecting taper shank 101, a tensioning device, a mounting platform 102, a twist drill 103, and a connecting device. The connecting device includes a convex block 104, a spline rod 105, a limiting plate 106, a threaded sleeve 107, and an anti-loosening block 108. The tensioning device includes a threaded pull rod 109 and an abutment plate 110. This solution solves the problem that most existing taper shank twist drills have an integrated structure, making it impossible for operators to replace different taper shank models as needed, resulting in inconvenience. Understandably, this solution allows operators to replace different taper shank models as needed.

[0022] In this embodiment, the connecting taper shank 101 is symmetrically provided with limiting slots, which cooperate with the positioning key provided on the mounting end face of the machine spindle. The purpose is to enable the machine tool spindle to stably drive the connecting taper shank 101 to rotate, thereby ensuring the stable rotation of the twist drill 103 and the drilling process. The machine tool spindle adopts a hollow spindle structure, and the drill bit setting structure at the front end of the twist drill 103 can directly adopt existing technology, such as the structure disclosed in existing technology CN214053771 U.

[0023] The connecting taper shank 101 is provided with a tensioning device at the top and an integral mounting platform 102 at the bottom. A twist drill 103 is detachably connected to the bottom of the mounting platform 102 via a connecting device. A drill bit is provided at the top of the twist drill 103. The tensioning device is used to fix the connecting taper shank 101 to the machine tool spindle, and the connecting device is used to realize the disassembly and installation of the twist drill 103 and the connecting taper shank 101.

[0024] The convex block 104 is integrally disposed on the end of the twist drill 103 away from the drill bit and is symmetrically disposed, and can be installed and engaged with the mating cavity on the mounting platform 102. The spline rod 105 passes through the twist drill 103 and the mounting platform 102 respectively, and the limiting plate 106 is integrally disposed on one end. The limiting plate 106 is slidably connected to the mounting platform 102. The threaded sleeve 107 is threadedly connected to the spline rod 105 and abuts against the mounting platform 102, and is located on the side of the spline rod 105 away from the limiting plate 106. The anti-loosening block 108 is threadedly connected to the mounting platform 102 and abuts against the threaded sleeve 107. The mounting platform 102 is vertically downwardly provided with mounting holes, and the holes are provided with mating grooves that cooperate with the convex block 104. The convex block 104 is integrally and symmetrically arranged on the connecting post end of the twist drill 103. The connecting post end is provided with a spline cavity that cooperates with the spline rod 105. The limiting plate 106 is integrally provided on one end of the spline rod 105, thereby forming a T-shaped structure. The end away from the limiting plate 106 is an external threaded stepped end, which facilitates the installation of the threaded sleeve 107. The threaded sleeve 107 has a T-shaped structure. The anti-loosening block 108 is installed in the threaded cavity on the mounting platform 102, and after installation, it abuts and limits the threaded sleeve 107.

[0025] Secondly, the threaded pull rod 109 is threadedly connected to the connecting tapered shank 101, and the abutment plate 110 is integrally provided on the top. The abutment plate 110 is integrally provided on the top of the threaded pull rod 109. The abutment plate 110 is a circular plate with an external hexagonal end at the top. The threaded pull rod 109 can pass through the internal through hole of the machine tool spindle, and its bottom external thread end mates with the threaded connection hole at the top of the connecting tapered shank 101. When the connecting taper shank 101 is installed on the machine tool spindle, the operator first inserts the connecting taper shank 101 into the machine tool spindle with one hand, and then aligns the symmetrically arranged limiting grooves on the connecting taper shank 101 with the positioning key on the mounting end face of the machine tool spindle. At the same time, the operator can use the other hand to vertically pass the threaded pull rod 109 through the machine tool spindle, so that its bottom external thread end engages with the threaded hole at the top of the connecting taper shank 101. Finally, the threaded pull rod 109 is tightened so that the abutment plate 110 abuts against the top end face of the machine tool spindle, and the connecting taper shank 101 can be stably installed on the machine tool spindle.

[0026] Then, the helix angle of the twist drill 103 is 25°.

[0027] Finally, sealing gaskets can be respectively provided on the side of the limiting plate 106 and the threaded sleeve 107 that abuts against the inner end face of the stepped cavity of the mounting platform 102. Annular mounting grooves can be respectively provided on the surfaces of the limiting plate 106 and the threaded sleeve 107 that abut against the mounting platform 102. Sealing gaskets made of rubber are adhered and fixed in the mounting grooves to provide a sealing fit when the limiting rings on the limiting plate 106 and the threaded sleeve 107 abut against the mounting platform 102.

[0028] To address the problem that most existing taper shank twist drills are of a single integrated structure, making it difficult for operators to change to different taper shank models and causing inconvenience, this invention addresses the issue that each connecting taper shank 101 has a different Morse taper, facilitating installation and mating with the inner taper hole of the machine tool spindle. Furthermore, the connecting taper shank 101 is mounted on the machine tool spindle via a tensioning device. In this application, the twist drill 103 is connected to the mounting platform of the connecting taper shank 101 via the structure of the convex block 104, the spline rod 105, the limiting plate 106, the threaded sleeve 107, and the anti-loosening block 108. 102 is connected and fixed, allowing for a detachable connection with the connecting taper shank 101. Subsequently, the connecting taper shank 101 can be separated from the twist drill 103 by sequentially removing the anti-loosening block 108, the threaded sleeve 107, and the spline rod 105. Different taper sizes of the connecting taper shank 101 can be directly replaced. The anti-loosening block 108 and the threaded sleeve 107 are installed and removed by rotating an Allen wrench, thus solving the problem that most existing taper shank twist drills have an integrated structure, making it difficult for operators to replace different models of taper shanks as needed, resulting in inconvenience.

[0029] Example 2:

[0030] like Figure 4 and Figure 5 As shown, where Figure 4 This is a schematic diagram of the overall structure of a replaceable taper shank twist drill. Figure 5 yes Figure 4 The enlarged view at point A shows that, based on the first embodiment, this utility model provides a replaceable taper shank twist drill. The mounting platform 102 is also provided with a retaining spring groove, which is close to the anti-loosening block 108. A retaining spring 201 is installed in the groove, and after installation, the retaining spring 201 abuts against the surface of the anti-loosening block 108.

[0031] In this embodiment, a retaining ring groove is directly provided on the outside of the threaded mounting cavity of the mounting platform 102 near the anti-loosening block 108, and the retaining ring 201 is installed in the retaining ring groove. This structure can further limit the anti-loosening block 108, which helps to improve the stability of the threaded sleeve 107 after installation.

[0032] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A replaceable taper shank twist drill, comprising a connecting taper shank, characterized in that: The top of the connecting cone shank is provided with a tensioning device, and the bottom is integrally provided with a mounting platform. A twist drill is detachably connected to the bottom of the mounting platform through a connecting device, and a drill bit is provided at the top of the twist drill. The connecting device includes a convex block, a spline rod, a limiting plate, a threaded sleeve, and an anti-loosening block. The convex block is integrally disposed on the end of the twist drill away from the drill bit and is symmetrically arranged, and can be installed and engaged with the mating cavity on the mounting platform. The spline rod passes through the twist drill and the mounting platform respectively, and the limiting plate is integrally disposed on one end. The limiting plate is slidably connected to the mounting platform. The threaded sleeve is threadedly connected to the spline rod and abuts against the mounting platform, and is located on the side of the spline rod away from the limiting plate. The anti-loosening block is threadedly connected to the mounting platform and abuts against the threaded sleeve.

2. The replaceable taper shank twist drill as described in claim 1, characterized in that: The tensioning device includes a threaded rod and an abutment plate. The threaded rod is threadedly connected to the connecting tapered shank, and the abutment plate is integrally provided on the top.

3. The replaceable taper shank twist drill as described in claim 1, characterized in that: The helix angle of the twist drill is 25°.

4. The replaceable taper shank twist drill as described in claim 1, characterized in that: Sealing gaskets may be respectively provided on the side of the limiting plate and the threaded sleeve that abuts against the inner end face of the stepped cavity of the mounting platform.

5. The drill bit replaceable taper shank twist drill according to claim 1, wherein : The mounting platform is also provided with a retaining spring groove, which is close to the anti-loosening block. A retaining spring is installed in the groove and abuts against the surface of the anti-loosening block after installation.

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