Milling cutter holder convenient for replacing milling cutter

Abstract

The utility model discloses a milling cutter holder convenient for replacing a milling cutter, and relates to the field of clamping cylinder cutter handles. The milling cutter comprises a cutter handle seat and a milling cutter body, a clamping cylinder is embedded in the inner side of the cutter handle seat, a cap body is in threaded connection with the upper portion of the outer side of the cutter handle seat, a fixing ring is fixedly connected to the outer surface of the cutter handle seat, a touch mechanism is arranged on the fixing ring, and the touch mechanism comprises an installation cavity. By means of mechanical linkage arrangement of the touch mechanism, when the cap body is screwed to preset clamping force, the telescopic rod and the limiting hole are clamped to generate touch feedback, an operator is directly prompted that the clamping force reaches the standard, and the clamping force can be accurately adjusted. The problem that clamping force of a traditional cutter handle is difficult to perceive is solved, operation safety and reliability are remarkably improved, meanwhile, smooth sliding of the telescopic rod when the telescopic rod does not reach the standard is guaranteed through arc guiding arrangement of the sliding way, friction loss is reduced, and the service life of the mechanism is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of collet tool holders, specifically a milling cutter holder that facilitates the replacement of milling cutters. Background Technology

[0002] The end mill holder (clamp shank) is the core component connecting the machine tool and the end mill. Its type and performance directly affect the machining accuracy and efficiency. Common types of shanks include BT shanks, HSK shanks, heat shrink shanks, and ER spring collet shanks. When selecting one, the clamping force, runout accuracy, and application scenario must be considered comprehensively.

[0003] Existing collet holders are widely used as mounting bases for milling cutters. However, there is a problem in actual use: when installing milling cutters with traditional collet holders, the clamping force on the milling cutter must be strictly controlled. If it is too tight or too loose, it will affect the normal use of the milling cutter. In view of this, the inventors urgently need to design a mounting mechanism that allows the operator to feel the clamping force on the milling cutter, thereby improving the ease of use of the milling cutter. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a milling cutter holder that facilitates the replacement of milling cutters, so as to solve the technical problem that the clamping force of traditional collet holders is difficult to perceive.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a milling cutter holder for easy replacement of milling cutters, comprising a cutter holder and a milling cutter, wherein a clamp is embedded in the inner side of the cutter holder, a cap is threadedly connected to the upper outer side of the cutter holder, a fixing ring is fixedly connected to the outer surface of the cutter holder, a tactile mechanism is provided on the fixing ring, the tactile mechanism includes a mounting cavity, a telescopic rod is movably disposed in the inner side of the mounting cavity, a limiting piece is fixedly connected to the outer surface of the telescopic rod, both ends of the mounting cavity are open structures, one end for the telescopic rod to protrude, and a fastening bolt is threadedly installed at the other end, and an elastic element is elastically connected between the limiting piece and the fastening bolt;

[0006] When the threaded connection between the cap and the knife handle seat reaches a specified tightness, the telescopic rod engages with the limiting hole on the bottom surface of the cap through an elastic element, providing a sensing signal to the user.

[0007] By adopting the above technical solution and setting a tactile mechanism, the telescopic rod, elastic element and the limiting hole of the cap are linked. When the operator tightens the cap, when the clamping force reaches the preset value, the end of the telescopic rod automatically engages with the limiting hole, producing a clear tactile feedback such as a "click" feeling. This allows for a direct judgment of the clamping status and avoids the milling cutter from shaking due to excessively loose clamping or deformation caused by excessively tight clamping.

[0008] Furthermore, a slide rail is provided on the bottom surface of the cap body. When the telescopic rod is not engaged with the limiting hole, the slide rail is a sliding track at the top of the telescopic rod.

[0009] By adopting the above technical solution, the slide rail opened on the bottom surface of the cap provides a smooth sliding track for the telescopic rod when it does not reach the clamping force threshold, ensuring that the end of the telescopic rod always keeps in contact with the slide rail during the rotation of the cap, thus avoiding mechanism failure or increased wear due to loss of contact.

[0010] Furthermore, the end of the telescopic rod that engages with the limiting hole has an arc-shaped structure, and the inner side of the limiting hole that engages with it has an arc-shaped structure.

[0011] By adopting the above technical solution, the arc-shaped ends and mating surfaces of the telescopic rod and the limiting hole significantly reduce the impact force at the moment of engagement, allowing the telescopic rod to be smoothly inserted into the limiting hole, reducing noise and component wear caused by metal collisions.

[0012] Furthermore, the inner wall of the slide is an arc structure, and the slide is adapted to slide with the end of the telescopic rod.

[0013] By adopting the above technical solution, the arc structure of the inner wall of the slide and the matching setting of the telescopic rod end further reduce the frictional resistance during the sliding process, ensuring that the telescopic rod can move smoothly along the slide when the locking is not triggered, reducing energy loss or component heating caused by friction.

[0014] Furthermore, the threaded connection between the fastening bolt and the mounting cavity allows for adjustment of the elasticity of the elastic element and the extension / retraction of the telescopic rod.

[0015] By adopting the above technical solution, the operator can easily adjust the preload of the elastic element by fastening the bolt and the threaded connection of the mounting cavity, thereby flexibly setting the trigger threshold of the tactile mechanism to adapt to the clamping force range required by different milling cutter diameters or materials.

[0016] Furthermore, a gasket is provided on the side of the fixing ring near the cap body, and one side of the gasket is adhered and fixed to the fixing ring.

[0017] By adopting the above technical solution, the gasket set between the fixing ring and the cap body absorbs the excessive axial pressure generated when the cap body is tightened through elastic deformation, preventing the collet from applying an overload clamping force to the milling cutter and avoiding scratches or structural deformation on the surface of the milling cutter.

[0018] Furthermore, the gasket is made of rubber and abuts against the top surface of the cap.

[0019] By adopting the above technical solution, the rubber gasket has excellent elasticity and wear resistance, and can form a stable buffer layer between the contact surface of the cap and the fixing ring, effectively relieving the impact load during the clamping process and reducing the direct friction loss between metal parts.

[0020] Furthermore, the milling cutter is placed at the central axis of the collet, and the threaded connection between the cap and the tool holder controls the clamping tightness of the collet on the milling cutter.

[0021] By adopting the above technical solution, the clamping force is evenly distributed along the radial direction of the clamping cylinder, ensuring that the milling cutter is always in the central axis position of the clamping cylinder, and avoiding tool runout or decrease in machining accuracy caused by clamping eccentricity.

[0022] In summary, the present invention has the following main advantages:

[0023] 1. This utility model uses a mechanical linkage of a tactile mechanism to generate tactile feedback when the cap is tightened to the preset clamping force, causing the telescopic rod to engage with the limiting hole. This directly prompts the operator that the clamping force is up to standard, solving the problem that the clamping force of traditional knife handles is difficult to perceive. This significantly improves the safety and reliability of operation. At the same time, the arc guide of the slide ensures that the telescopic rod slides smoothly when the force is not up to standard, reducing frictional wear and extending the service life of the mechanism.

[0024] 2. This utility model allows for flexible setting of the preload threshold of the elastic element for different milling cutter sizes through the adjustment function of the fastening bolt, enhancing the versatility of the tool holder. At the same time, the buffering effect of the rubber gasket absorbs excessive clamping force, preventing milling cutter deformation or surface damage, and suppressing the transmission of machining vibration, thereby improving machining stability. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0028] Figure 4 This utility model Figure 2 A magnified structural diagram at point B in the middle.

[0029] In the diagram: 1. Tool holder; 2. Cap body; 3. Clamping sleeve; 4. Milling cutter; 5. Touch mechanism; 501. Mounting cavity; 502. Telescopic rod; 503. Limiting plate; 504. Fastening bolt; 505. Elastic element; 506. Limiting hole; 507. Slide rail; 6. Gasket; 7. Retaining ring. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In this embodiment:

[0032] A milling cutter holder for easy cutter replacement, such as Figure 1-4 As shown, the device includes a tool holder 1 and a milling cutter 4. A clamping sleeve 3 is embedded in the inner side of the tool holder 1, and a cap 2 is threadedly connected to the upper outer side of the tool holder 1. A fixing ring 7 is fixedly connected to the outer surface of the tool holder 1, and a tactile mechanism 5 is provided on the fixing ring 7. The tactile mechanism 5 includes a mounting cavity 501, and a telescopic rod 502 is movably arranged inside the mounting cavity 501. A limiting piece 503 is fixedly connected to the outer surface of the telescopic rod 502. Both ends of the mounting cavity 501 are open structures, with one end for the telescopic rod to protrude and the other end threaded with a fastening bolt 504. An elastic element 505 is elastically connected between the limiting piece 503 and the fastening bolt 504.

[0033] When the threaded connection between the cap body 2 and the tool holder 1 reaches the specified tightness, the telescopic rod 502 engages with the limiting hole 506 on the bottom surface of the cap body 2 through the elastic element 505, providing a sensory signal to the user. By setting a tactile mechanism 5, the telescopic rod 502, the elastic element 505 and the limiting hole 506 of the cap body 2 are linked together, so that when the operator tightens the cap body 2, when the clamping force reaches the preset value, the end of the telescopic rod 502 automatically engages with the limiting hole 506, producing a clear tactile feedback such as a "click" feeling, thereby intuitively judging the clamping status and avoiding the milling cutter 4 from shaking due to excessively loose clamping or deformation caused by excessively tight clamping. At the same time, the open design at both ends of the mounting cavity 501, combined with the adjustment function of the fastening bolt 504, allows for flexible adjustment of the preload of the elastic element 505, adapting to the clamping requirements of different specifications of milling cutters 4, and improving the versatility and operational controllability of the tool holder 1.

[0034] See Figure 3 , Figure 4 The bottom surface of the cap body 2 is provided with a slide rail 507. When the telescopic rod 502 is not engaged with the limiting hole 506, the slide rail 507 serves as a sliding track for the top end of the telescopic rod 502. The slide rail 507 on the bottom surface of the cap body 2 provides a smooth sliding track for the telescopic rod 502 when it does not reach the clamping force threshold, ensuring that the end of the telescopic rod 502 always remains in contact with the slide rail 507 during the rotation of the cap body 2, avoiding mechanism failure or increased wear due to loss of contact. At the same time, the guiding effect of the slide rail 507 makes the movement trajectory of the telescopic rod 502 more stable, reduces mechanical interference caused by deflection, further ensures the reliability of the tactile feedback mechanism, and provides the operator with a continuous and consistent operating experience.

[0035] See Figure 3 , Figure 4 The end of the telescopic rod 502 that engages with the limiting hole 506 is arc-shaped, and the inner side of the limiting hole 506 is arc-shaped. The arc-shaped end and the engagement surface of the telescopic rod 502 and the limiting hole 506 significantly reduce the impact force at the moment of engagement, allowing the telescopic rod 502 to smoothly embed into the limiting hole 506, reducing noise and wear caused by metal collisions. At the same time, the self-centering of the arc structure optimizes the engagement accuracy, and even after repeated use, it can still maintain a tight fit of the contact surface, avoiding blurred or failed tactile feedback signals due to local wear, and extending the service life of the tactile mechanism 5.

[0036] See Figure 3 , Figure 4 The inner wall of the slide 507 has a circular arc structure. The slide 507 is adapted to slide along the end of the telescopic rod 502. The circular arc structure of the inner wall of the slide 507 and the adaptation of the end of the telescopic rod 502 further reduce the frictional resistance during the sliding process, ensuring that the telescopic rod 502 can move smoothly along the slide 507 when the engagement is not triggered, reducing energy loss or component heating caused by friction. At the same time, the geometric matching characteristics of the circular arc slide 507 effectively prevent the telescopic rod 502 from lateral displacement or vibration during the sliding process, maintaining the overall dynamic stability of the mechanism, thereby ensuring the accuracy and repeatability of the clamping force sensing process.

[0037] See Figure 2 , Figure 3 The threaded connection between the fastening bolt 504 and the mounting cavity 501 allows for adjustment of the elasticity of the elastic element 505 and the extension / retraction of the telescopic rod 502. The threaded connection between the fastening bolt 504 and the mounting cavity 501 also allows the operator to easily adjust the preload of the elastic element 505, thereby flexibly setting the trigger threshold of the tactile mechanism 5 to adapt to the clamping force range required for different milling cutter diameters or materials. Furthermore, this adjustment mechanism is achieved through a purely mechanical structure, eliminating the need for complex electronic equipment or external tools. This simplifies the operation process and avoids functional failures caused by electrical component malfunctions, significantly improving the reliability and ease of maintenance of the tool holder 1.

[0038] See Figure 2 , Figure 3 , Figure 4A gasket 6 is provided on the side of the retaining ring 7 near the cap body 2. One side of the gasket 6 is adhered and fixed to the retaining ring 7. The gasket 6 between the retaining ring 7 and the cap body 2 absorbs the excessive axial pressure generated when the cap body 2 is tightened through elastic deformation, preventing the collet 3 from applying an overload clamping force to the milling cutter 4, avoiding scratches or structural deformation on the surface of the milling cutter 4. At the same time, the buffering effect of the gasket 6 can reduce the vibration transmission of the tool holder 1 under high-speed rotation or heavy cutting conditions, improve machining stability, and is especially suitable for high-precision milling scenarios, extending the overall service life of the tool and the tool holder 1.

[0039] See Figure 2 , Figure 3 , Figure 4 The shim 6 is made of rubber and abuts against the top surface of the cap 2. The rubber shim 6 has excellent elasticity and wear resistance, and can form a stable buffer layer between the contact surface of the cap 2 and the retaining ring 7, effectively relieving the impact load during the clamping process and reducing the direct friction loss between metal parts. At the same time, the damping characteristics of the rubber material can further suppress the transmission of cutting vibration to the tool holder 1, reduce noise and resonance during the machining process, thereby improving the surface quality of the machined material and ensuring the smooth operation of the milling cutter 4 under complex working conditions.

[0040] See Figure 1 , Figure 2 The milling cutter 4 is placed at the central axis of the collet 3. The threaded connection between the cap 2 and the tool holder 1 controls the clamping degree of the collet 3 on the milling cutter 4, so that the clamping force is evenly distributed along the radial direction of the collet 3, ensuring that the milling cutter 4 is always at the central axis position of the collet 3, avoiding tool runout or decrease in machining accuracy caused by clamping eccentricity. At the same time, this structure achieves precise control of the shrinkage of the collet 3 through the linear drive of thread tightening, which not only ensures the repeatability of clamping force, but also simplifies the operation process, and is suitable for high-efficiency machining scenarios where the milling cutter 4 is frequently changed.

[0041] The implementation principle of this embodiment is as follows: During operation, the milling cutter 4 is inserted into the clamping sleeve 3 inside the tool holder seat 1, and then the outer cap 2 is tightened. The clamping sleeve 3 is driven to retract radially through the threaded connection to clamp the milling cutter 4. When the cap 2 is tightened to the preset clamping force, the tactile mechanism 5 on the fixing ring 7 starts to work: the telescopic rod 502 in the mounting cavity 501 is pushed by the elastic element 505, and its end automatically engages with the limiting hole 506 on the bottom surface of the cap 2, producing obvious tactile feedback such as a "click" feeling, indicating to the operator that the clamping force has reached the standard. If the specified tightness is not reached, the top of the telescopic rod 502 slides along the slide 507 at the bottom of the cap 2 without triggering the engagement action. The preload of the elastic element 505 can be changed by adjusting the fastening bolt 504, thereby adapting to the clamping requirements of milling cutters of different diameters. In addition, the shim 6 provides buffer between the cap 2 and the fixing ring 7 to prevent overload clamping from causing deformation of the milling cutter. The entire process realizes clamping force sensing through mechanical linkage, without the need for electronic detection devices.

[0042] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A milling cutter holder facilitating replacement of a milling cutter, characterized in that: The device includes a tool holder (1) and a milling cutter (4). A clamp (3) is embedded in the inner side of the tool holder (1). A cap (2) is threadedly connected to the upper outer side of the tool holder (1). A fixing ring (7) is fixedly connected to the outer surface of the tool holder (1). A tactile mechanism (5) is provided on the fixing ring (7). The tactile mechanism (5) includes a mounting cavity (501). A telescopic rod (502) is movably provided inside the mounting cavity (501). A limiting piece (503) is fixedly connected to the outer surface of the telescopic rod (502). Both ends of the mounting cavity (501) are open structures. One end allows the telescopic rod to protrude, and the other end is threaded with a fastening bolt (504). An elastic element (505) is elastically connected between the limiting piece (503) and the fastening bolt (504). When the threaded connection between the cap body (2) and the knife handle seat (1) reaches a specified value, the telescopic rod (502) engages with the limiting hole (506) on the bottom surface of the cap body (2) through the elastic element (505), providing a sensing signal to the user.

2. The milling cutter holder for facilitating the replacement of a milling cutter according to claim 1, characterized in that: The bottom surface of the cap body (2) is provided with a slide rail (507). When the telescopic rod (502) and the limiting hole (506) are not engaged, the slide rail (507) is the sliding track of the top end of the telescopic rod (502).

3. The milling cutter holder for facilitating the replacement of a milling cutter according to claim 1, characterized in that: The end of the telescopic rod (502) that engages with the limiting hole (506) is arc-shaped, and the inner side of the limiting hole (506) is arc-shaped.

4. The milling cutter holder for facilitating the replacement of a milling cutter according to claim 2, characterized in that: The inner wall of the slide (507) is an arc structure, and the slide (507) is adapted to slide with the end of the telescopic rod (502).

5. The milling cutter holder for easy cutter replacement according to claim 1, characterized in that: The fastening bolt (504) is threadedly connected to the mounting cavity (501), which can adjust the elasticity of the elastic element (505) and the extension and retraction of the telescopic rod (502).

6. The milling cutter holder facilitating the replacement of the milling cutter according to claim 1, characterized in that: A gasket (6) is provided on the side of the fixing ring (7) near the cap body (2), and one side of the gasket (6) is adhered and fixed to the fixing ring (7).

7. The milling cutter holder for facilitating the replacement of a milling cutter according to claim 6, characterized in that: The gasket (6) is made of rubber and abuts against the top surface of the cap (2).

8. The milling cutter holder facilitating the replacement of the milling cutter according to claim 1, characterized in that: The milling cutter (4) is placed at the central axis of the clamping sleeve (3), and the threaded connection between the cap (2) and the tool holder seat (1) controls the clamping degree of the clamping sleeve (3) on the milling cutter (4).

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