Anti-rotation drill bit locking sleeve

Abstract

The utility model discloses an anti-rotation drill bit locking sleeve which comprises a sleeve body with the two ends being an inserting end and a fixing end respectively, and the inner diameter of the inserting end is larger than the outer diameter of the fixing end. Clamping columns which are distributed in the circumferential direction and rotate between a clamping position and an attaching position are arranged on the inner side of the sleeve body, the rotating axis of each clamping column is separated from the axis of the clamping column, the rotating axis of each clamping column and the axis of the sleeve body are located on the same plane, and the clamping columns are used for being attached to the circumferential outer edge of a drilling tool inserted into the inner side of the sleeve body at the attaching position. And in the clamping position, the clamping columns are matched with one another to clamp the drilling tool. When the anti-rotation drill bit locking sleeve is used, the clamping columns are rotated to the attaching station, insertion and taking-out of an inserted drilling tool are facilitated, after the drilling tool is attached to the circumferential inner wall of the sleeve body, the drilling tool is rotated to enable the clamping columns to rotate to the clamping station, the clamping columns are matched with one another to clamp and fix the drilling tool, and therefore relative fixed connection of the sleeve body and the drilling tool is achieved; therefore, the drilling tool is convenient to mount, dismount and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to an anti-rotation drill bit locking sleeve. Background Art

[0002] A drill bit is a rotating cutting tool with a pointed tip, mainly used to cut circular holes in metals and other hard materials, and can be used to process holes of different types and sizes. During the processing, the drill bit needs to apply a large pressure when rotating in order to form a hole on the metal surface.

[0003] In the prior art, tools such as screwdrivers are usually used to fix fasteners such as bolts to fix the drill bit on the sleeve, and then the sleeve is fixedly installed on the machine tool, resulting in troublesome installation and disassembly of the drill bit and difficult to quickly replace the drill bit.

[0004] Therefore, it is necessary to improve the locking sleeve for fixing the drill bit in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects existing in the prior art and provide an anti-rotation drill bit locking sleeve that is convenient for quick installation, disassembly and replacement.

[0006] To achieve the above technical effects, the technical solution of the utility model is: an anti-rotation drill bit locking sleeve, including a sleeve body with an insertion end and a fixed end at both ends respectively, the fixed end is used to connect with the output end of the machine tool, the insertion end is used to axially insert the drilling tool along the sleeve body and the inner diameter is larger than the outer diameter of the fixed end, the circumferential inner wall of the sleeve body is used to be hermetically connected with the circumferential outer edge of the drilling tool and the surface is a conical surface:

[0007] On the inner side of the circumferential outer edge of the sleeve body, there are clamping columns distributed along the circumferential direction of the sleeve body and rotating between a clamping position and a fitting position. The rotation axis line of the clamping column is separated from its own axis line and is in the same plane as the axis line of the sleeve body. In the fitting position, the clamping column is used to fit with the circumferential outer edge of the drilling tool inserted into the inner side of the sleeve body. In the clamping position, each clamping column cooperates with each other to clamp the drilling tool.

[0008] Preferably, in order to apply a uniform and consistent fastening force to the drilling tool to ensure the clamping and fixing effect on the drilling tool, the clamping columns are annularly arrayed along the circumferential direction of the sleeve body with the axis line of the sleeve body as the center.

[0009] Preferably, in order to facilitate the insertion of the drilling tool for fixing, a reset assembly is further arranged inside the sleeve body, and the reset assembly is used to reset the clamping column to the fitting position after the drilling tool disengages from the clamping column.

[0010] Preferably, in order to reset the clamping column to the fitting position under natural conditions, the reset assembly includes a magnetic member disposed inside the sleeve body and a magnetic conductive member disposed inside the inner circumference of the outer edge of the clamping column, and the clamping column is a non-magnetic conductive member.

[0011] Preferably, in order to further enhance the fastening effect on the drill tool, an elastic sealing ring is further disposed inside the outer circumference of the sleeve body, and the circumferential inner wall of the sleeve body is located between the outer circumference of the sealing ring and the inner circumference of the sealing ring.

[0012] Preferably, in order to further enhance the fastening effect on the drill tool, at least two sealing rings are provided and are distributed at intervals along the axial direction of the sleeve body.

[0013] Preferably, in order to facilitate the rotation of the clamping column between the fitting position and the clamping position, a fastening frame is further disposed between the outer circumference and the circumferential inner wall of the sleeve body, an eccentric shaft is provided on the fastening frame, and the clamping column is hermetically sleeved outside the eccentric shaft.

[0014] Preferably, in order to ensure that the outer circumference of the clamping column can be in close contact with the drill tool inserted inside the sleeve body in the fitting position, an elastic sealing sleeve is provided between the clamping column and the eccentric shaft, so that the outer circumference of the clamping column itself protrudes from the inner side of the circumferential inner wall of the sleeve body without external force.

[0015] Preferably, in order to facilitate the assembly of the sleeve body, the sleeve body includes a first sleeve and a second sleeve distributed along its own axial direction, and the first sleeve and the second sleeve are detachably connected to enclose an annular assembly cavity, and the clamping column, the fastening frame and the eccentric shaft are all disposed in the assembly cavity, and the fastening frame fits between the cavity walls at both ends of the assembly cavity.

[0016] Preferably, in order to further facilitate the assembly of the device, a convex column and a notch with a limit fit are provided between the cavity wall at at least one end of the assembly cavity and the fastening frame.

[0017] In summary, compared with the prior art, the anti-rotation drill bit locking sleeve of the present invention rotates the clamping column to the fitting station, which facilitates the insertion and removal of the inserted drill tool. After the drill tool fits with the circumferential inner wall of the sleeve body, the drill tool is rotated to make the clamping column rotate to the clamping station, and the clamping columns cooperate with each other to clamp and fix the drill tool, thereby realizing the relative fixed connection between the sleeve body and the drill tool, thus facilitating the installation, disassembly and replacement operations of the drill tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the first embodiment;

[0019] Figure 2 is Figure 1Explosion schematic diagram;

[0020] Figure 3 is Figure 2 Enlarged view of part A of

[0021] Figure 4 Schematic diagram of the structure from another perspective of the first embodiment;

[0022] Figure 5 is Figure 1 Schematic diagram of the sectional structure of

[0023] Figure 6 is Figure 5 Explosion schematic diagram;

[0024] Figure 7 Schematic diagram of the connection structure between the first embodiment and the drill tool;

[0025] Figure 8 is Figure 7 Explosion schematic diagram;

[0026] Figure 9 Schematic diagram of the structure of the sleeve body of the second embodiment;

[0027] Figure 10 is Figure 9 Explosion schematic diagram;

[0028] Figure 11 Schematic diagram of the connection structure between the fastener and the clamping column of the third embodiment;

[0029] Figure 12 is Figure 11 Explosion schematic diagram;

[0030] In the figure: 1. Sleeve body; 11. First sleeve; 111. Insertion end; 12. Second sleeve; 121. Fixed end; 13. Convex column; 14. Fixed frame; 15. Bolt; 2. Drill tool; 3. Clamping column; 4. Magnetic attraction part; 5. Magnetic conductive part; 6. Sealing ring; 7. Fastening frame; 71. Eccentric hole; 72. Notch; 8. Eccentric shaft; 81. Sealing sleeve. Specific embodiments

[0031] The following combines the drawings and embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0032] First embodiment

[0033] As Figures 1 - 8As shown in the figure, the anti-rotation drill bit locking sleeve of the first embodiment of the present utility model includes a sleeve body 1 with an insertion end 111 and a fixed end 121 at both ends. The fixed end 121 is used to connect with the output end of the machine tool, and the insertion end 111 is used to axially insert the drill tool 2 along the sleeve body 1 and its inner diameter is larger than the outer diameter of the fixed end 121. The circumferential inner wall of the sleeve body 1 is used to be hermetically connected with the circumferential outer edge of the drill tool 2 and the surface is a conical surface;

[0034] On the inner side of the circumferential outer edge of the sleeve body 1, there are clamping columns 3 distributed along the circumference of the sleeve body 1 and rotating between a clamping position and a fitting position. The rotation axis line of the clamping column 3 is separated from its own axis line and is in the same plane as the axis line of the sleeve body 1. In the fitting position, the clamping column 3 is used to fit with the circumferential outer edge of the drill tool 2 inserted inside the sleeve body 1. In the clamping position, each clamping column 3 cooperates with each other to clamp the drill tool 2.

[0035] When the anti-rotation drill bit locking sleeve of this embodiment is in use, the clamping column 3 is adjusted to the fitting position, so that the circumferential outer edge of the clamping column 3 is tangent to the outside of the surface where the circumferential inner wall of the sleeve body 1 is located. Then, the drill tool 2 is inserted from the insertion end 111. After the circumferential outer edge of the drill tool 2 fits with the circumferential inner wall of the sleeve body 1, the circumferential outer edge of the drill tool 2 fits with the circumferential outer edge of the clamping column 3. Then, the drill tool 2 is rotated to drive the clamping column 3 to rotate. Since the rotation axis line of the clamping column 3 is separated from its own axis line and is in the same plane as the axis line of the sleeve body 1, the clamping column 3 is an eccentric column, so that the clamping column 3 rotates to the clamping position. In the clamping position, each clamping column 3 cooperates with each other to clamp and fix the drill tool 2, thus realizing the relative fixed connection between the drill tool 2 and the sleeve body 1; when it is necessary to disassemble and replace, the drill tool 2 is rotated in the reverse direction, so that the clamping column 3 rotates to the fitting position. In this position, the circumferential outer edge of the drill tool 2 fits with the circumferential outer edge of the clamping column 3, so that it is convenient to take out the drill tool 2 from the insertion end 111 along the axis of the sleeve body 1.

[0036] Therefore, when using this device, there is no need to rely on tools such as screwdrivers. Only need to insert the drill tool 2 and then rotate it by a certain angle, so that the clamping columns 3 cooperate with each other to clamp the drill tool 2, and the relative fixed connection between the drill tool 2 and the sleeve body 1 can be realized. When taking out the drill tool 2, rotate the drill tool 2 in the reverse direction to make the clamping column 3 return to the fitting position, and then the drill tool 2 can be taken out along the axis of the sleeve body 1. The operation is convenient, which is conducive to the quick installation, disassembly and replacement of the drill tool 2.

[0037] The surface where the circumferential inner wall of the sleeve body 1 is located is a conical surface, and the inner diameter of the insertion end 111 is larger than the inner diameter of the fixed end 121, so that the inner cavity of the sleeve body 1 is in a flared shape, which is convenient for inserting and taking out the drill tool 2, and ensures that as the insertion depth of the drill tool 2 increases, the circumferential outer edge of the drill tool 2 is hermetically and fittingly connected with the circumferential inner wall of the sleeve body 1.

[0038] A further improvement is that the clamping columns 3 are circumferentially distributed in an annular array with the axis of the sleeve body 1 as the center. After adopting this structure, the clamping columns 3 are evenly distributed circumferentially inside the sleeve body 1. When clamping and fixing the drill 2, a uniform clamping force can be applied from the outer surface of the drill 2, thus ensuring the clamping and fixing effect on the drill 2.

[0039] For the convenience of assembly, the sleeve body 1 includes a first sleeve 11 and a second sleeve 12 that are coaxially distributed along its own axis. The insertion end 111 is arranged at one end of the first sleeve 11 away from the second sleeve 12, and the fixed end 121 is arranged at one end of the second sleeve 12 away from the first sleeve 11. A fixing bracket 14 is also arranged at the fixed end 121. The first sleeve 11, the second sleeve 12 and the fixing bracket 14 are detachably and fixedly connected by bolts 15 distributed in an annular array. A rectangular fixing plate is arranged at one end of the fixing bracket 14 away from the second sleeve 12, and through holes are arranged at the four corners of the fixing plate. Screws can be screwed into the inner sides of the through holes to fixedly install the fixing bracket 14 at the output end of the rotating device of the machine tool, thereby connecting the sleeve body 1 with the output end of the rotating device of the machine tool. After inserting and fastening the drill 2 into the sleeve body 1, when the rotating device of the machine tool operates, the sleeve body 1 and the drill 2 can be driven to rotate synchronously.

[0040] A further improvement is that a reset assembly is also arranged inside the sleeve body 1. The reset assembly is used to reset the clamping column 3 to the fitting position after the drill 2 is separated from the clamping column 3. By setting the reset assembly, in the natural state, that is, when no external force acts on the clamping column 3, the reset assembly can reset the clamping column 3 to the fitting position, so that workers do not need to deliberately adjust the position of the clamping column 3, which is convenient for quickly inserting the drill 2, thus facilitating the quick installation of the drill 2.

[0041] A further improvement is that the reset assembly includes a magnetic part 4 arranged inside the sleeve body 1 and a magnetic conductive part 5 arranged on the inner side of the circumferential outer edge of the clamping column 3. The clamping column 3 is a non-magnetic conductive part 5; a fastening frame 7 is also arranged between the circumferential outer edge and the circumferential inner wall of the sleeve body 1. An eccentric shaft 8 is arranged on the fastening frame 7. The clamping column 3 is sleeved outside the eccentric shaft 8 in a sealed manner; the first sleeve 11 and the second sleeve 12 are detachably connected to enclose an annular assembly cavity. The clamping column 3, the fastening frame 7 and the eccentric shaft 8 are all arranged in the assembly cavity, and the fastening frame 7 fits between the cavity walls at both ends of the assembly cavity.

[0042] Specifically, the magnetic attraction member 4 is a magnetic ring, which is arranged between the first sleeve 11 and the second sleeve 12 and sleeved outside the fastening frame 7. The outer diameter of the magnetic ring is consistent with the inner diameter of the assembly cavity. The circumferential outer edge of the magnetic attraction member 4 is hermetically attached to the circumferential inner wall of the assembly cavity. The fastening frame 7 is an annular structure coaxial with the magnetic attraction member 4, and flanges are provided at both ends. Through holes in the shape of eccentric holes 71 are provided on the flanges. Eccentric jacks are provided in the eccentric holes 71, and eccentric shafts 8 are inserted through the inner sides of the eccentric jacks. The clamping columns 3 are sleeved outside the eccentric shafts 8. The axis of the clamping column 3 and the axis of the eccentric shaft 8 are in the same plane and have a spacing. An installation through hole with an axis parallel to the axis of the eccentric shaft 8 is also provided on the clamping column 3. A magnetic conduction member 5 is fixed inside the installation through hole. The clamping column 3 is made of non-magnetic austenitic stainless steel, and the magnetic conduction member 5 is an iron core. The two ends of the clamping column 3 are attached to the flanges at both ends of the fastening frame 7.

[0043] To ensure the assembly accuracy, convex columns 13 and notches 72 for limit fit are provided between the cavity wall at at least one end of the assembly cavity and the fastening frame 7.

[0044] Specifically, a first step opening is provided on the surface of the first sleeve 11 adjacent to the second sleeve 12, and a second step opening is provided on the surface of the second sleeve 12 adjacent to the first sleeve 11. The first step opening and the second step opening combine to form an annular assembly cavity. Convex columns 13 arranged in a circumferential array with the axis of the sleeve body 1 as the center line are provided on the inner bottom wall of the first step opening and the inner wall of the second step opening. Notches 72 arranged in a circumferential array with the axis of the fastening frame 7 as the center line are provided on the flanges at both ends of the fastening frame 7. The convex columns 13 and the notches 72 correspond to each other one by one. The notch 72 is an arc-shaped through hole, and its width dimension is consistent with the outer diameter of the convex column 13.

[0045] After adopting the above structure, when assembling the locking sleeve in this embodiment, a magnetic conductive member 5 is inserted into the clamping column 3. The magnetic conductive member 5 can be fastened to the inner side of the installation through-hole of the clamping column 3 by glue. The clamping column 3 is placed between the flanges at both ends of the fastening frame 7, so that the eccentric jack on the clamping column 3 is aligned with the eccentric hole 71 on the flange. After the second step opening of the second sleeve 12 faces upward, the fastening frame 7 with the magnetic conductive member 5 and the clamping column 3 is placed into the second step opening, so that the notch 72 of the bottom flange of the fastening frame 7 is sleeved outside the convex column 13 on the inner bottom wall of the second step opening. Since the outer diameter of the convex column 13 is the same as the width of the notch 72, the axis of the fastening frame 7 is ensured to coincide with the axis of the second sleeve 12. Then, the magnetic attracting member 4 is installed. The magnetic attracting member 4 is a magnetic ring with an outer diameter the same as the inner diameter of the assembly cavity, so there is no need to fix the magnetic attracting member 4. The lower part of the magnetic attracting member 4 is adapted to the second step opening. Then, the first sleeve 11 is installed on the top of the second sleeve 12, and the fixing frame 14 is installed at the bottom of the second sleeve 12. When the first sleeve 11 and the second sleeve 12 are combined and connected to form the sleeve body 1 and fixedly connected to the fixing frame 14 through the bolt 15, the fastening frame 7, the clamping column 3 and the magnetic attracting member 4 are installed inside the sleeve body 1. And because the magnetic attracting member 4 attracts the clamping column 3 made of iron core, when the clamping column 3 is not affected by other external forces, the clamping column 3 rotates to the fitting position. At this position, the outer circumference of the clamping column 3 is tangent to the outer side of the curved surface where the circumferential inner wall of the sleeve body 1 is located.

[0046] Second Embodiment

[0047] As Figure 9 and Figure 10 shown, the anti-rotation drill bit locking sleeve of the second embodiment of the present utility model is based on the first embodiment. The difference is that an elastic sealing ring 6 is further provided on the inner side of the outer circumference of the sleeve body 1, and the circumferential inner wall of the sleeve body 1 is located between the outer circumference of the sealing ring 6 and the inner circumference of the sealing ring 6.

[0048] Further improvement is that at least two sealing rings 6 are provided and are distributed at intervals along the axial direction of the sleeve body 1.

[0049] Specifically, three annular grooves are provided on the circumferential inner wall of the second sleeve 12 and are distributed along its own axial direction. The annular grooves are equipped with sealing rings 6, and the sealing rings 6 are rubber rings. By providing the sealing rings 6, the fastening force after the connection between the drill tool 2 and the sleeve body 1 can be enhanced, and when the drill tool 2 moves downward, it can be prevented from detaching from the sleeve body 1.

[0050] Third Embodiment

[0051] As Figure 11 and Figure 12As shown in the figure, the anti-rotation drill bit locking sleeve of the third embodiment of the present utility model is based on the first embodiment. The difference is that an elastic sealing sleeve 81 is provided between the clamping column 3 and the eccentric shaft 8, so that the outer circumference of the clamping column 3 itself protrudes from the inner side of the circumferential inner wall of the sleeve body 1 when no external force is applied.

[0052] Specifically, the sealing sleeve 81 is a rubber sleeve. The axial outer circumference of the sealing sleeve 81 is fixed on the circumferential inner wall of the eccentric jack, and the circumferential inner wall of the sealing sleeve 81 is hermetically connected to the outer circumference of the eccentric shaft 8.

[0053] The sealing sleeve 81 can undergo elastic deformation when subjected to pressure. Therefore, by using the sealing sleeve 81 between the clamping column 3 and the eccentric shaft 8, the position of the clamping column 3 can be slightly changed. When the sleeve body 1 and the clamping column 3 are assembled and not affected by other external forces, in the fitting position, a part of the outer circumference of the clamping column 3 protrudes inwards from the curved surface where the circumferential inner wall of the sleeve body 1 is located. In this way, after the drill tool 2 is inserted, through the elastic deformation of the sealing sleeve 81, the sealing sleeve 81 is deformed under pressure, increasing the pressure between the clamping column 3 and the surface of the drill tool 2. It is ensured that after the drill tool 2 rotates during the fixed installation process, it can drive the clamping column 3 to rotate synchronously, so that the clamping column 3 rotates to the clamping position. In the clamping position, the clamping columns 3 cooperate with each other to realize the fastening of the drill tool 2.

[0054] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An anti-rotation drill locking sleeve, comprising a sleeve body (1) having two ends, an insertion end (111) and a fixed end (121), the fixed end (121) being used to connect to an output end of a machine tool, the insertion end (111) being used to insert a drill tool (2) along the axial direction of the sleeve body (1) and having an inner diameter greater than an outer diameter of the fixed end (121), the circumferential inner wall of the sleeve body (1) being used to be sealed and connected to the circumferential outer edge of the drill tool (2) and the curved surface thereof being a conical surface, characterized in that: A clamping column (3) is arranged on the inner side of the circumferential outer edge of the sleeve body (1) and is distributed along the circumference of the sleeve body (1) and rotates between a clamping position and a fitting position. The rotation axis of the clamping column (3) is separated from its own axis and is located in the same plane as the axis of the sleeve body (1). In the fitting position, the clamping column (3) is used to fit with the circumferential outer edge of the drilling tool (2) inserted into the inner side of the sleeve body (1). In the clamping position, the clamping columns (3) cooperate with each other to clamp the drilling tool (2).

2. The anti-rotation drill bit locking sleeve according to claim 1, characterized in that: The clamping columns (3) are distributed in a circular array along the circumference of the sleeve body (1) and along the axis of the sleeve body (1).

3. The anti-rotation drill bit locking sleeve according to claim 1, characterized in that: A reset component is also provided on the inner side of the sleeve body (1), and the reset component is used to reset the clamping column (3) to a fitted position after the drilling tool (2) is separated from the clamping column (3).

4. The anti-rotation drill bit locking sleeve according to claim 3, characterized in that: The reset assembly comprises a magnetic attraction component (4) arranged in the sleeve body (1) and a magnetic conductive component (5) arranged on the inner side of the circumferential outer edge of the clamping column (3); the clamping column (3) is a non-magnetic conductive component (5).

5. The anti-rotation drill bit locking sleeve according to claim 1, characterized in that: An elastic sealing ring (6) is also provided on the inner side of the circumferential outer edge of the sleeve body (1), and the circumferential inner wall of the sleeve body (1) is located between the circumferential outer edge of the sealing ring (6) and the circumferential inner wall of the sealing ring (6).

6. The anti-rotation drill bit locking sleeve according to claim 5, characterized in that: At least two sealing rings (6) are provided and are spaced apart from each other along the axial direction of the sleeve body (1).

7. The anti-rotation drill bit locking sleeve according to claim 1, characterized in that: A fastening frame (7) is further provided between the circumferential outer edge and the circumferential inner wall of the sleeve body (1), an eccentric shaft (8) is provided on the fastening frame (7), and the sealing sleeve of the clamping column (3) is provided outside the eccentric shaft (8).

8. The anti-rotation drill bit locking sleeve according to claim 7, characterized in that: An elastic sealing sleeve (81) is provided between the clamping column (3) and the eccentric shaft (8), so that the circumferential outer edge of the clamping column (3) protrudes from the inner side of the circumferential inner wall of the sleeve body (1) when no external force is applied.

9. The anti-rotation drill bit locking sleeve according to claim 7, characterized in that: The sleeve body (1) comprises a first sleeve (11) and a second sleeve (12) which are distributed along the sleeve body's axial direction. The first sleeve (11) and the second sleeve (12) are detachably connected to enclose an annular assembly cavity. The clamping column (3), the fastening frame (7) and the eccentric shaft (8) are all arranged in the assembly cavity. The fastening frame (7) is fitted between the cavity walls at both ends of the assembly cavity.

10. The anti-rotation drill bit locking sleeve according to claim 9, characterized in that: A convex column (13) and a recess (72) for limited position matching are arranged between the cavity wall at at least one end of the assembly cavity and the fastening frame (7).

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