Locking mechanism for preventing centrifugal throwing of tools in disc tool magazine

Abstract

The utility model relates to a lock sword mechanism of disc cutter library prevents centrifugal force to throw sword utensil, and this lock sword mechanism directly limits the mutual inward closing movement trend of the rear end of clamping claw through the rear end mobile setting limit seat of two clamping claws, when the disc cutter high -speed rotates, the sword utensil has the tendency of throwing outwards under centrifugal force, this tendency can transform into the acting force of the rear end of clamping claw inward closing, and the limit seat can accurately offset the acting force, avoid the opening of the front end of clamping claw due to the closing of rear end, thereby ensuring the clamping force of clamping end to sword utensil stable, thoroughly solved the sword utensil loosening, deviation even falling off problem caused by centrifugal force of traditional mechanism, significantly improved the operation safety of disc cutter library under high -speed working condition.

Description

Technical Field

[0001] This utility model relates to the field of CNC tool magazine technology, and in particular to a tool locking mechanism for preventing centrifugal force from throwing the tool out of a disc tool magazine. Background Technology

[0002] In automated machining equipment such as CNC machine tools, the disc tool magazine, as the core component for automatic tool exchange, directly determines machining efficiency and accuracy through its operational stability and reliability. With the upgrading of machining requirements, the rotational speed of disc tool magazines is constantly increasing to shorten tool change time; however, the enormous centrifugal force generated during high-speed rotation becomes a key issue affecting tool clamping stability.

[0003] Traditional disc tool magazines often rely on a single spring to drive the clamping jaws and hold the tool. Their design focuses solely on clamping force at static or low speeds, neglecting the impact of high-speed centrifugal force on the clamping system. When the tool magazine rotates at high speed, the tool is subject to centrifugal force and tends to be thrown outwards. The spring force of traditional clamping mechanisms is insufficient to counteract this centrifugal force, potentially causing the tool to fall off during rotation. This not only damages the equipment and renders the workpiece unusable, but also poses a significant threat to operator safety. Utility Model Content

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a tool locking mechanism for preventing centrifugal force from throwing the tool out of a disc tool magazine.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A tool locking mechanism for preventing centrifugal force from throwing tools from a disc tool magazine includes a tool magazine mounting support and a tool magazine located at the lower end of the tool magazine mounting support. Several sets of tool clamping mechanisms are arranged around the upper edge of the tool magazine. Each tool clamping mechanism includes two clamping claws that are symmetrically hinged. The front ends of the two clamping claws are clamping ends for clamping tools. A first spring is connected between the rear ends of the two clamping claws. A limiting seat is movably arranged on the tool magazine and located between the rear ends of the two clamping claws. The limiting seat is movably arranged at the rear ends of the two clamping claws, thereby restricting the rear ends of the two clamping claws from moving inward toward each other.

[0006] In some embodiments, a movable groove is provided on the cutter head for the limiting seat to move up and down, and a second spring is provided between the lower end of the limiting seat and the bottom wall of the movable groove. The second spring keeps the limiting seat in an upward position, thereby restricting the rear ends of the two clamping claws from moving inward toward each other.

[0007] In some embodiments, an extension seat is provided on one side of the cutter head mounting support, and a cylinder is provided at the outer end of the extension seat. The piston rod of the cylinder is positioned downward and can move downward to press the limiting seat downward.

[0008] In some embodiments, the limiting seat includes a bottom round seat and a cone disposed at the upper end of the bottom round seat, and the rear ends of the two clamping claws are respectively provided with inclined surfaces that fit against the cone.

[0009] In some embodiments, the taper of the cone is 1:5.

[0010] In some embodiments, an intermediate seat is provided on the cutter head and between the two clamping claws, the two clamping claws are hinged to the intermediate seat, and a limiting through hole is provided on one side of the rear end of the intermediate seat, and the first spring passes through the limiting through hole.

[0011] In some embodiments, a clearance notch is provided on one side of the cone, the rear end of the intermediate seat extends onto the clearance notch, and the rear end of the intermediate seat can restrict the bottom circular seat from moving upward.

[0012] In some embodiments, a geared motor for driving the cutter head to rotate is further provided on the cutter head mounting support.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This tool locking mechanism directly restricts the tendency of the rear ends of the clamping claws to move inwards by setting a limiting seat at the rear end of the two clamping claws. When the tool disc rotates at high speed, the tool tends to be thrown outwards due to centrifugal force. This tendency is converted into a force that causes the rear ends of the clamping claws to move inwards. The limiting seat can accurately counteract this force, preventing the front end of the clamping claws from opening due to the rear ends moving inwards. This ensures that the clamping force of the clamping end on the tool is stable, completely solving the problem of tool loosening, displacement, or even falling off caused by centrifugal force in traditional mechanisms, and significantly improving the operational safety of the disc tool magazine under high-speed conditions. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the disc tool magazine of this utility model.

[0015] Figure 2 This utility model Figure 1 Enlarged diagram of point A.

[0016] Figure 3 This is a schematic diagram of the locking mechanism of this utility model.

[0017] Figure 4 This is a partial cross-sectional view of the present invention.

[0018] Figure 5 This is a top view of the present invention.

[0019] Figure 6 This utility model Figure 5 Schematic diagram of section AA. Detailed Implementation

[0020] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of this utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0021] like Figures 1-6 The tool locking mechanism of the disc tool magazine shown in the figure, which prevents the centrifugal force from throwing the tool, includes a tool head mounting support 1 and a tool head 2 located at the lower end of the tool head mounting support 1. Several sets of tool clamping mechanisms are arranged around the upper edge of the tool head 2. The tool clamping mechanism includes two clamping claws 3 symmetrically hinged. The front end of the two clamping claws 3 is a clamping end 4 for clamping the tool 10. A first spring 5 is connected between the rear ends of the two clamping claws 3. A limiting seat 6 is movably arranged on the tool head 2 and located between the rear ends of the two clamping claws 3. The limiting seat 6 is movably arranged at the rear ends of the two clamping claws 3, thereby restricting the rear ends of the two clamping claws 3 from moving inward towards each other.

[0022] When the cutter head 2 rotates at high speed to shorten the tool change time, the tool 10 generates a huge centrifugal force due to the circular motion with the cutter head, and tends to be thrown outward. At this time, the limit seat 6 plays a key locking role.

[0023] Centrifugal force acts on the tool 10 and is transmitted to the front clamping end, causing the clamping end to tend to open outward. Since the clamping jaw 3 is a lever structure, the tendency of the front end to open outward will be converted into the force of the rear ends to move inward (lever reverse movement). If not restricted, the clamping force at the front end will be greatly reduced, and the tool may even loosen. At this time, the limiting seat 6, which is movable between the rear ends of the two clamping jaws 3, will directly block the inward movement of the rear ends of the two clamping jaws 3 (the limiting seat and the rear ends of the clamping jaws form a rigid contact, limiting their displacement). After the inward movement of the rear ends of the clamping jaws 3 is locked by the limiting seat 6, the front clamping end cannot open outward and always maintains the clamping state of the tool 10, thereby counteracting the influence of centrifugal force and ensuring that the tool does not loosen or fall off during high-speed rotation. This ensures that the clamping force of the clamping end on the tool is stable, completely solving the problem of tool loosening, displacement or even falling off caused by centrifugal force in traditional mechanisms, and significantly improving the operational safety of the disc tool magazine under high-speed conditions.

[0024] See Figures 2-6As shown, a movable groove 21 is provided on the cutter head 2 for the limiting seat 6 to move up and down. A second spring 22 is provided between the lower end of the limiting seat 6 and the bottom wall of the movable groove 21. The second spring 22 keeps the limiting seat 6 in an upward position, thereby restricting the rear ends of the two clamping claws 3 from moving inward towards each other.

[0025] An extension seat 31 is provided on one side of the cutter head mounting support 1, and a cylinder 32 is provided at the outer end of the extension seat 31. The piston rod 33 of the cylinder 32 is set downward and can move downward to press the limiting seat 6 downward.

[0026] When it is necessary to load or unload the tool and unlock it, the mechanism actively releases the limit by means of a cylinder. Specifically: the control system receives an unlocking signal and triggers the cylinder 32 on the extension seat 31 to move; the cylinder piston rod 33 extends downward and precisely presses against the upper end face of the limit seat 6, applying downward pressure; this pressure overcomes the elastic support force of the second spring 22 and pushes the limit seat to move downward along the movable groove 21 until the limit seat 6 is completely disengaged from the rear end of the clamping claw 3, no longer obstructing the movement of the rear end of the clamping claw; after the rear end of the clamping claw is freed from the restriction of the limit seat, it gains space to move inward, at which point the robot applies an outward spreading force to the clamping end 4, which can easily open the clamping end to realize the loading and unloading of the tool; after loading and unloading is completed, the control system triggers the cylinder to reset, the piston rod retracts, and the elastic restoring force of the second spring 22 pushes the limit seat to reset upward along the movable groove, re-fitting the rear end of the clamping claw, restoring the locked state, and waiting for the next operation.

[0027] Furthermore, the limiting seat 6 includes a bottom round seat 41 and a cone 42 disposed on the upper end of the bottom round seat 41. The rear ends of the two clamping claws 3 are respectively provided with inclined surfaces 43 that fit against the cone 42. The taper of the cone 42 is 1:5.

[0028] The optimized limiting seat 6 improves the initial locking accuracy through the cooperation of the conical surface and the inclined surface; the second spring 22 is in a pre-compressed state, pushing the bottom round seat 41 of the limiting seat 6 to move upward along the movable groove 21, so that the outer surface of the cone 42 is in close contact with the inclined surface 43 at the rear end of the two clamping claws 3; the taper of the cone 42 is 1:5. This taper design makes the contact between the cone surface and the inclined surface a surface contact rather than a point contact, which can more evenly distribute the force on the rear end of the clamping claw; it not only restricts the rear end of the clamping claw from moving inward, but also avoids the rear end of the clamping claw from shifting left and right through the guiding effect of the cone surface, ensuring that the clamping position of the clamping end 4 on the tool 10 is always accurate.

[0029] In addition, the structure of the conical and inclined surfaces provides optimized guidance. During unlocking, as the cone moves downward, the conical surface provides stable guidance for the inclined surface, preventing the rear end of the gripper from jamming. During locking (resetting), the second spring 22 pushes the cone upward, and the conical surface guides the rear end of the gripper to accurately return to the locking position without additional calibration. This ensures that the conical surface and the inclined surface fit tightly after each locking, maintaining a stable locking state. The success rate of unlocking and locking remains 100%, and even with long-term, high-frequency unlocking, there will be no problem with unsuccessful unlocking.

[0030] In this utility model, an intermediate seat 61 is provided on the cutter head 2 and between the two clamping claws 3. The two clamping claws 3 are hinged to the intermediate seat 61, and a limiting through hole 62 is provided on one side of the rear end of the intermediate seat 61. The first spring 5 passes through the limiting through hole 62.

[0031] The two clamping claws 3 are hinged to an independent intermediate seat 61 to form a modular assembly of intermediate seat and clamping claws. This assembly is fixed to the surface of the cutter head by fasteners such as bolts. The first spring 5 passes through the limiting through hole 62 at the rear end of the intermediate seat and is connected to the rear end of the clamping claws at both ends. The limiting through hole ensures that the spring only extends and retracts along the line connecting the two clamping claws to avoid spring deviation.

[0032] A clearance notch 81 is provided on one side of the cone 42, and the rear end of the intermediate seat 61 extends onto the clearance notch 81, and the rear end of the intermediate seat 61 can restrict the bottom round seat 41 from moving upward.

[0033] The clearance notch 81 on one side of the cone 42 provides a dedicated space for the rear end of the intermediate seat 61, allowing the rear end of the intermediate seat 61 to extend into the notch, forming a longitudinal limiting base for the limiting seat 6 and preventing structural interference between the intermediate seat 61 and the limiting seat 6. When the limiting seat 6 maintains its upward shape under the elastic support of the second spring 22, the upper end face of its bottom round seat 41 will closely abut against the lower end face of the rear end of the intermediate seat 61 extending into the clearance notch 81. The rear end of the intermediate seat, by abutting against the bottom round seat, directly restricts the limiting seat from continuing to move upward. At the same time, combined with the lateral constraint of the movable groove 21, the limiting seat is always stably positioned between the rear ends of the two clamping claws 3, completely avoiding the risk of the limiting seat coming off upward due to excessive spring force or vibration, and ensuring the locking function is stable and reliable.

[0034] In this invention, a geared motor 71 for driving the tool disc 2 to rotate is also provided on the tool disc mounting support 1; when the disc tool magazine needs to switch tools, the geared motor acts as a power source to drive the tool disc to rotate precisely.

[0035] Based on the accompanying drawings and the foregoing display and description of the basic principles, main features, and advantages of this utility model, those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tool locking mechanism for preventing centrifugal force from throwing tools from a disc tool magazine, comprising a tool magazine mounting support (1) and a tool magazine (2) disposed at the lower end of the tool magazine mounting support (1), wherein a plurality of tool clamping mechanisms are arranged around the upper edge of the tool magazine (2), characterized in that: The tool clamping mechanism includes two clamping claws (3) with symmetrical hinges. The front ends of the two clamping claws (3) are clamping ends (4) for clamping the tool (10). A first spring (5) is connected between the rear ends of the two clamping claws (3). A limiting seat (6) is movably arranged on the tool disc (2) between the rear ends of the two clamping claws (3). The limiting seat (6) is movably arranged at the rear ends of the two clamping claws (3), thereby restricting the rear ends of the two clamping claws (3) from moving inward towards each other.

2. The tool locking mechanism for preventing centrifugal force from throwing the tool in a disc tool magazine according to claim 1, characterized in that: A movable groove (21) is provided on the cutter head (2) for the limit seat (6) to move up and down. A second spring (22) is provided between the lower end of the limit seat (6) and the bottom wall of the movable groove (21). The second spring (22) keeps the limit seat (6) in an upward position, thereby restricting the rear ends of the two clamping claws (3) from moving inward towards each other.

3. The tool locking mechanism for preventing centrifugal force from throwing the tool in a disc tool magazine according to claim 2, characterized in that: An extension seat (31) is provided on one side of the cutter head mounting support (1), and a cylinder (32) is provided at the outer end of the extension seat (31). The piston rod (33) of the cylinder (32) is set downward and can move downward to press the limiting seat (6) down.

4. The tool locking mechanism for preventing centrifugal force from throwing the tool in a disc tool magazine according to claim 2, characterized in that: The limiting seat (6) includes a bottom round seat (41) and a cone (42) located at the upper end of the bottom round seat (41). The rear ends of the two clamping claws (3) are respectively provided with inclined surfaces (43) that fit against the cone (42).

5. The tool locking mechanism for preventing centrifugal force from throwing the tool in a disc tool magazine according to claim 4, characterized in that: The taper of the cone (42) is 1:

5.

6. The tool locking mechanism for preventing centrifugal force from throwing the tool in a disc tool magazine according to claim 4, characterized in that: An intermediate seat (61) is provided on the cutter head (2) and between the two clamping claws (3). The two clamping claws (3) are hinged to the intermediate seat (61), and a limiting through hole (62) is provided on one side of the rear end of the intermediate seat (61). The first spring (5) passes through the limiting through hole (62).

7. The tool locking mechanism for preventing centrifugal force from throwing the tool in a disc tool magazine according to claim 6, characterized in that: A clearance notch (81) is provided on one side of the cone (42), the rear end of the intermediate seat (61) extends to the clearance notch (81), and the rear end of the intermediate seat (61) can restrict the bottom round seat (41) from moving upward.

8. The tool locking mechanism for preventing centrifugal force from throwing the tool in a disc tool magazine according to claim 1, characterized in that: A geared motor (71) for driving the cutter head (2) to rotate is also provided on the cutter head mounting support (1).

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