A double locking mechanism for a knife

Abstract

The utility model relates to lathe tool technical field especially relates to a tool dual locking mechanism, its structure includes: the handle for connecting with lathe, the arbor that installs in the handle front end, the handle front end is equipped with the mounting hole that supplies the arbor insertion, the handle lateral wall is equipped with first threaded hole and second threaded hole along the arbor insertion direction in proper order, still includes the side pressure bolt and the upper pull bolt that are connected with first threaded hole, second threaded hole corresponding respectively, the insertion end lateral wall of arbor is equipped with the side pressure limiting slot that supplies the side pressure bolt rotation into first threaded hole and top contact, the utility model discloses through the side pressure bolt, the upper pull bolt lock and connect to the handle, arbor, strengthen the stability that arbor is connected with handle, prevent the tool clamping mechanism to appear the loosening phenomenon in the processing, avoid the damage that causes to work piece and tool, promote the rigidity that the arbor connects simultaneously still, ensure the stability and the safety of operator in the processing process.

Description

Technical Field

[0001] This utility model relates to the field of machine tool cutting tool technology, and in particular to a double locking mechanism for cutting tools. Background Technology

[0002] Tool holders are used for cutting metal, a common application in machining, especially in environments with high cutting resistance. Common types include side-locking tool holders and heavy-duty tool holders. Side-locking tool holders primarily provide side-locking clamping force, but their end-face contact force is insufficient, resulting in moderate rigidity. Heavy-duty tool holders, on the other hand, primarily provide a tight clamping force, offering high precision but also higher price. However, they lack end-face contact, and their rigidity cannot exceed the shank diameter.

[0003] Meanwhile, existing tool clamping systems rely solely on a single locking nut for fixation. However, during machine tool processing, due to long processing times and significant vibrations, under heavy processing loads and large feed rates, the tool clamping mechanism is prone to loosening. This not only damages the workpiece and the tool itself but also poses safety hazards to the operator. Utility Model Content

[0004] This invention provides a double locking mechanism for cutting tools, which can effectively solve the above-mentioned problems.

[0005] This utility model is implemented as follows:

[0006] A double locking mechanism for cutting tools includes: a tool holder for connection to a machine tool, a tool bar mounted on the front end of the tool holder, the front end of the tool holder having a mounting hole for inserting the tool bar, the side wall of the tool holder having a first threaded hole and a second threaded hole sequentially along the insertion direction of the tool bar, and further including a side pressure bolt and a pull bolt respectively connected to the first threaded hole and the second threaded hole, the insertion end side wall of the tool bar having a side pressure limiting groove for the side pressure bolt to abut against the first threaded hole after being screwed in, and also having a pull bolt to abut against the second threaded hole after being screwed in, the pull bolt being eccentrically positioned with respect to the second threaded hole; the bottom of the pull bolt is an outer cone shape, and the diameter of the pull bolt being an inner cone shape corresponding to the outer cone shape of the pull bolt.

[0007] As a further improvement, a flange end face is formed on the tool holder to limit the insertion depth of the tool holder.

[0008] As a further improvement, the side pressure limiting groove has a first end face that abuts against the bottom surface of the side pressure bolt. Both the first end face and the bottom surface of the side pressure bolt are planar structures, and the first end face is perpendicular to the axis of the side pressure bolt.

[0009] As a further improvement, the first threaded hole and the second threaded hole are on the same plane.

[0010] As a further improvement, the first end face has upward arc-shaped chamfers at both ends along the length of the tool holder.

[0011] As a further improvement, the front end of the tool holder is bolted with two blades.

[0012] As a further improvement, both the side pressure bolt and the pull bolt are recessed into the first threaded hole and the second threaded hole when locked.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model uses side-pressure bolts and pull-up bolts to lock the tool holder and tool shank together, which enhances the stability of the connection between the tool shank and the tool holder, prevents the tool clamping mechanism from loosening during processing, avoids damage to the workpiece and the tool, and also improves the rigidity of the tool shank connection, ensuring the stability of the processing and the safety of the operator.

[0015] 2. This utility model provides a flange end face on the tool holder. When the tool holder is inserted into the mounting hole, the first threaded hole and the second threaded hole can be quickly positioned to the depth of the side pressure limiting groove and the upper pull tapered hole, which facilitates rapid installation and improves installation efficiency. At the same time, the end face tight connection method significantly improves the rigidity of the connection between the tool holder and the tool shank. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a double locking mechanism for a cutting tool provided by this utility model;

[0018] Figure 2 This is a three-dimensional assembly structure diagram of the double locking mechanism for cutting tools provided by this utility model;

[0019] Figure 3 This is a partial cross-sectional structural schematic diagram of the double locking mechanism provided by this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the tool holder provided by this utility model;

[0021] Figure 5 This is a schematic diagram of a half-section of the tool holder provided by this utility model;

[0022] Figure 6This is a schematic diagram of the double locking mechanism provided by this utility model from the left side.

[0023] Figure 7 This is a schematic diagram showing the positions of the pull-up bolt and the pull-up tapered hole provided by this utility model.

[0024] In the diagram: tool holder-1, tool bar-2, mounting hole-11, first threaded hole-12, second threaded hole-13, side pressure bolt-3, pull-up bolt-4, side pressure limiting groove-21, pull-up tapered hole-22, flange end face-23, blade-5. Detailed Implementation

[0025] All embodiments of this utility model are intended to fall within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating that the purpose, technical solution, and advantages of the method are clearer. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort indicate or imply the relative importance of the indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Existing tool clamping systems rely solely on a single locking nut for fixation. However, during machine tool processing, due to long processing times and significant vibrations, under heavy processing loads and large feed rates, the tool clamping mechanism is prone to loosening. This not only damages the workpiece and the tool itself but also poses safety hazards to the operator. To address these technical problems, this paper proposes the following technical solution:

[0028] Reference Figures 1-7As shown, a double locking mechanism for a cutting tool includes: a tool holder 1 for connection to a machine tool, a tool shank 2 mounted at the front end of the tool holder 1, the front end of the tool holder 1 having a mounting hole 11 for inserting the tool shank 2, the side wall of the tool holder 1 having a first threaded hole 12 and a second threaded hole 13 sequentially along the insertion direction of the tool shank 2, and further including a side pressure bolt 3 and a pull-up bolt 4 respectively connected to the first threaded hole 12 and the second threaded hole 13, the side wall of the insertion end of the tool shank 2 having a side pressure limiting groove 21 for the side pressure bolt 3 to abut against the first threaded hole 12 after being screwed in, and a pull-up conical hole 22 for the pull-up bolt 4 to abut against the second threaded hole 13 after being screwed in, the pull-up conical hole 22 being eccentrically positioned with respect to the second threaded hole 13; the bottom of the pull-up bolt 4 is an outer conical shape, and the diameter of the pull-up conical hole 22 is an inner conical shape corresponding to the outer conical shape of the pull-up bolt 4;

[0029] In use, align the tool holder 2 with the mounting hole 11 and insert it. Simultaneously rotate the tool holder 2 so that the side pressure limiting groove 21 is aligned with the first threaded hole 12. Then, screw the side pressure bolt 3 and the pull bolt 4 into the first threaded hole 12 and the second threaded hole 13 in sequence. When the side pressure bolt 3 is tightened, the bottom of the side pressure bolt 3 abuts against the side pressure limiting groove 21, thereby firmly locking the tool holder 2 in the mounting hole 11. Since the pull bolt 4 and the pull tapered hole 22 are eccentrically set, when the pull bolt 4 is tightened downward, the bottom of the pull bolt 4 moves down along the inclined surface inside the pull tapered hole 22, thereby generating an upward pulling force on the tool holder 2. This further enhances the stability of the connection between the tool holder 2 and the tool shank 1, prevents the tool clamping mechanism from loosening during processing, avoids damage to the workpiece and the tool, and also improves the rigidity of the tool holder connection, ensuring the stability of the processing process and the safety of the operator.

[0030] The tool holder 2 has a flange end face 23 for limiting the insertion depth of the tool holder 2; when the tool holder 2 is inserted into the mounting hole 11, it is limited by the flange end face 23, so that the first threaded hole 12 and the second threaded hole 13 are quickly positioned to the depth of the side pressure limiting groove 21 and the upper pull tapered hole 22, which facilitates quick installation and improves installation efficiency; at the same time, after the side pressure bolt 3 and the upper pull bolt 4 are tightened, the end face of the flange end face 23 facing the tool handle 1 is close to the end face of the opening of the mounting hole 11 of the tool handle 1, and the rigidity of the connection between the tool holder 2 and the tool handle 1 is significantly improved by the end face close connection.

[0031] The side pressure limiting groove 21 has a first end face that abuts against the bottom surface of the side pressure bolt 3. Both the first end face and the bottom surface of the side pressure bolt 3 are planar structures, and the first end face is perpendicular to the axis of the side pressure bolt 3. This ensures that the contact between the side pressure bolt 3 and the side pressure limiting groove 21 is more stable when the side pressure bolt 3 is tightened, avoiding loosening of the connection due to force deviation. It also improves the vibration resistance and external impact resistance of the entire clamping system during the processing, further ensuring the firmness of the tool holder clamping and the high precision of the tool processing.

[0032] The first threaded hole 12 and the second threaded hole 13 are on the same plane, which makes the installation and disassembly of the tool holder 2 and the tool shank 1 easier and faster.

[0033] The first end face has upward arc-shaped chamfers at both ends along the length of the tool bar 2, which makes the connection between the side pressure bolt 3 and the side pressure limiting groove 21 smoother.

[0034] The front end of the tool holder 2 is connected to two blades 5 by bolts, so that cutting is performed by the blades 5.

[0035] When the side pressure bolt 3 and the pull bolt 4 are tightened, they are both recessed into the first threaded hole 12 and the second threaded hole 13, and do not protrude from the first threaded hole 12 and the second threaded hole 13. This avoids the risk of scratching caused by the protruding part of the bolt and reduces the potential damage to external personnel or objects during the processing.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double locking mechanism for cutting tools, comprising: A tool holder (1) for connection with a machine tool, and a tool shank (2) mounted at the front end of the tool holder (1), characterized in that: the front end of the tool holder (1) is provided with a mounting hole (11) for insertion of the tool shank (2), the side wall of the tool holder (1) is provided with a first threaded hole (12) and a second threaded hole (13) in sequence along the insertion direction of the tool shank (2), and further includes a side pressure bolt (3) and a pull bolt (4) respectively connected to the first threaded hole (12) and the second threaded hole (13), and the tool shank (2) The insertion end sidewall is provided with a side pressure limiting groove (21) for the side pressure bolt (3) to be screwed into the first threaded hole (12) and abut against it. It is also provided with an upper pull tapered hole (22) for the upper pull bolt (4) to be screwed into the second threaded hole (13) and abut against it. The upper pull tapered hole (22) and the second threaded hole (13) are set in an eccentric state. The bottom of the upper pull bolt (4) is an outer cone shape, and the diameter of the upper pull tapered hole (22) is an inner cone shape corresponding to the outer cone shape of the upper pull bolt (4).

2. The double locking mechanism for a cutting tool as described in claim 1, characterized in that: The tool holder (2) has a flange end face (23) formed thereon for limiting the insertion depth of the tool holder (2).

3. A double locking mechanism for a cutting tool as described in claim 1 or 2, characterized in that: The side pressure limiting groove (21) has a first end face that abuts against the bottom surface of the side pressure bolt (3). Both the first end face and the bottom surface of the side pressure bolt (3) are planar structures, and the first end face is perpendicular to the axis of the side pressure bolt (3).

4. The double locking mechanism for a cutting tool as described in claim 3, characterized in that: The first threaded hole (12) and the second threaded hole (13) are on the same plane.

5. The double locking mechanism for a cutting tool as described in claim 3, characterized in that: The first end face has upward arc-shaped chamfers at both ends along the length direction of the tool holder (2).

6. The double locking mechanism for a cutting tool as described in claim 3, characterized in that: The front end of the cutter bar (2) is connected to two blades (5) by bolts.

7. The double locking mechanism for a cutting tool as described in claim 1, characterized in that: When the side pressure bolt (3) and pull bolt (4) are tightened, they are both recessed into the first threaded hole (12) and the second threaded hole (13).

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