Tool changing mechanism of vertical machining center

Abstract

The utility model discloses a tool changing mechanism of a vertical machining center, and belongs to the technical field of machine tools. The tool changing mechanism comprises a supporting base, a tool changing assembly, a connecting shaft assembly and a drill bit clamp. The tool changing assembly is composed of a fixed bending disc, a movable bending disc and shaft sleeve rings, the fixed bending disc is fixed to the supporting base, the movable bending disc is rotatably installed on the bottom face of the fixed bending disc, and the multiple shaft sleeve rings are arranged on the surface of the fixed bending disc and used for installing drill bit clamps. The connecting shaft assembly comprises a main shaft rod and a driven disc, the main shaft rod is rotatably installed on the surface of the curve fixing disc, the driven disc is fixed to the top end of the main shaft rod and matched with the shaft sleeve ring, and rapid replacement of the drill bit clamp is achieved. Permanent magnets are arranged on the inner sides of the main shaft rod and the driven disc and are uniformly distributed on the surfaces of the main shaft rod and the driven disc to form stable magnetic coupling connection. According to the tool changing mechanism, through magnetic connection and the spherical disc-shaped design, the operation steps are simplified, the tool changing efficiency and the machining precision are improved, and the tool changing mechanism is suitable for precision machining occasions where tools need to be frequently replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a tool changing mechanism for a vertical machining center. Background Art

[0002] In existing vertical machining centers, the tool changing mechanism usually adopts the traditional mechanical connection method, which requires manual loosening and tightening of bolts to complete the tool change. This tool changing method has many problems, such as complicated operation, low tool changing efficiency, and low precision, especially in processing occasions where frequent tool changes are required, which seriously affects production efficiency. The operation of the traditional tool changing mechanism is cumbersome and requires the operator to have certain operating skills, otherwise it is easy to cause improper installation and affect the processing accuracy. In addition, the traditional tool changing mechanism usually adopts a mechanical locking method, which has poor durability and reliability. Long-term use is prone to problems such as loose locking and loosening, causing the tool to shift during the processing process, thereby affecting the processing quality.

[0003] In response to the above-mentioned problems in the prior art, the utility model provides a tool changing mechanism for a vertical machining center. By adopting a magnetic pole coupling and a tool changing method similar to the switching of microscope lenses, the tool can be quickly replaced and firmly locked, the operation steps are simplified, the tool changing efficiency and machining accuracy are improved, and the utility model is suitable for various precision machining occasions that require frequent tool changes, and has high practical value. Utility Model Content

[0004] The utility model aims to solve the technical problems existing in the prior art or related technologies.

[0005] In one possible embodiment, a tool changing mechanism for a vertical machining center is provided, comprising: a support seat, a tool changing assembly, a coupling assembly, and a drill clamp. The tool changing assembly comprises a fixed curved plate, a movable curved plate, and a shaft collar, wherein the fixed curved plate is fixed to the surface of the support seat, the movable curved plate is rotatably mounted on the bottom surface of the fixed curved plate, a plurality of shaft collars are provided on the surface of the fixed curved plate, the inner side of the shaft collars is rotatably sleeved with the drill clamp, and the drill clamp is used for replacing and installing the drill rod. The coupling assembly comprises a main shaft rod and a driven plate, the main shaft rod is rotatably mounted on the surface of the fixed curved plate, the driven plate is fixed to the top end of the coupling assembly and rotatably sleeved on the inner side of the shaft collar, a plurality of permanent magnets are provided on the inner side of the main shaft rod and the driven plate, the plurality of permanent magnets on the surface of the main shaft rod and the driven plate are evenly distributed in the circumferential direction, and the magnetic poles of adjacent permanent magnets are in opposite directions, and the permanent magnets on the surface of the main shaft rod and the driven plate are arranged relative to each other.

[0006] In one possible embodiment, a vertically arranged buckle tongue is fixedly installed on the surface of the fixed curved plate, and a buckle groove corresponding to the shaft sleeve is opened on the surface of the movable curved plate. The buckle tongue is elastically pressed into the buckle groove to achieve locking of the fixed curved plate and the movable curved plate.

[0007] In a possible embodiment, the fixed curved disk and the movable curved disk are both spherical curved disks, and are arranged obliquely, so as to switch the corresponding drill bit holder and the spindle rod to the same vertical axis.

[0008] In a possible implementation manner, a bearing ring structure is provided on the inner side of the shaft sleeve ring to support the stable rotation of the drill clamp during operation.

[0009] In a possible embodiment, the permanent magnets are arranged in an annular shape, and the permanent magnets of the main shaft and the driven disk are respectively disposed in corresponding annular grooves to enhance the magnetic connection strength between the main shaft and the driven disk and improve transmission stability.

[0010] In a possible embodiment, the drill bit clamp is a multi-jaw chuck structure, which is used to clamp drill bits of different specifications during the installation of the drill rod and ensure the coaxiality of the drill rod and the drill bit clamp.

[0011] Beneficial effects of the utility model

[0012] 1. This utility model achieves rapid replacement and installation of drill rods through the interaction of the fixed and movable curved plates. The design of the latch tongue and latch groove simplifies the tool change process and significantly improves tool change efficiency, making it suitable for vertical machining centers requiring frequent tool changes.

[0013] 2. In the present invention, the interaction between the main shaft rod and the permanent magnets evenly distributed on the inner side of the driven disk ensures a stable connection between the tool changing assembly and the coupling assembly, improves the stability and accuracy of the transmission, and ensures the coaxiality of the drill rod and the main shaft of the machining center during the processing.

[0014] 3. In the present invention, a bearing ring structure is designed on the inner side of the shaft sleeve ring, which further enhances the stability of the drill clamp during operation, reduces processing errors caused by unstable rotation, and improves the durability and stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the surface structure of a tool changing assembly according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the exploded structure of a tool changing assembly according to one embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of a coupling assembly and a drill bit clamp according to an embodiment of the present invention;

[0019] Figure 5This is a schematic diagram of the exploded structure of a coupling assembly and a drill bit clamp according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] 100, support seat;

[0022] 200, tool change assembly; 210, fixed curved plate; 220, movable curved plate; 230, shaft collar; 211, buckle tongue; 221, buckle groove;

[0023] 300, coupling assembly; 310, main shaft; 320, driven plate; 330, permanent magnet;

[0024] 400, drill bit holder; 410, drill rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other unless there is any conflict.

[0026] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0027] The following is combined with Figure 1-Figure 5 Some embodiments of the present invention provide a tool changing mechanism for a vertical machining center.

[0028] The utility model provides a tool changing mechanism for a vertical machining center, aiming to improve tool changing efficiency and machining accuracy. The following is a specific implementation of the tool changing mechanism:

[0029] The support base 100 is the foundation of the tool changer, used to securely mount the entire mechanism on the mainframe of the vertical machining center. The support base 100 is typically made of high-strength material, capable of withstanding various mechanical stresses during operation of the machining center, ensuring the stability of the mechanism.

[0030] Tool changing assembly 200:

[0031] The tool changer is the core part of this utility model, which is mainly used for the quick replacement of tools. It specifically includes the following parts:

[0032] The fixed bending plate 210 is a fixed disc-shaped structure, which is installed on the surface of the support base 100 and is fixedly connected to the support base 100. The material of the fixed bending plate 210 is generally a high-strength alloy material to provide sufficient wear resistance and stability.

[0033] The bottom surface of the fixed crank disk 210 contacts the movable crank disk 220, allowing the movable crank disk 220 to rotate freely thereon. The surface of the fixed crank disk 210 is provided with a number of shaft collars 230, which are evenly distributed and are used to install the drill bit clamp 400. The movable crank disk 220 is a disk-shaped structure that can rotate freely relative to the fixed crank disk 210. The movable crank disk 220 is installed on the bottom surface of the fixed crank disk 210 and can rotate smoothly through built-in bearings or sliding accessories. The movable crank disk 220 is provided with a number of buckle grooves 221. The positions of these buckle grooves 221 correspond one-to-one with the shaft collars 230 on the fixed crank disk 210. They are used to cooperate with the buckle tongues 211 on the fixed crank disk 210 when changing tools to achieve the locking function of the two disks. The shaft collar 230 is fixedly mounted on the surface of the fixed crank disk 210, and a bearing ring structure is provided on its inner side. The shaft collar 230 is used to install and support the drill clamp 400, ensuring that the drill clamp 400 can rotate stably during tool change and machining, thereby avoiding machining errors caused by unstable rotation.

[0034] The coupling assembly 300 connects the spindle of a vertical machining center (VMC) to the drill chuck 400, ensuring synchronized rotation of the tool and the spindle during operation. This assembly comprises the following components: The spindle rod 310, a key component of the coupling assembly 300, is fixedly mounted on the surface of the fixed plate 210 and connected to the output port of the VMC. The spindle rod 310 forms a magnetic connection with the driven plate 320 through evenly distributed permanent magnets 330, ensuring stable transmission of the spindle. The driven plate 320 is fixedly mounted at the top of the spindle rod 310 and connected to the drill chuck 400 via a collar 230 below it. This design allows the driven plate 320 to rotate synchronously with the spindle rod 310, thereby driving the drill chuck 400. The permanent magnets 330 are evenly distributed on the inner sides of the spindle rod 310 and the driven plate 320, forming a ring-shaped arrangement. The magnetic poles of adjacent permanent magnets 330 are in similar orientation, ensuring a stable magnetic connection between the main shaft 310 and the driven disk 320. This magnetic connection design allows the entire transmission system to remain stable at high speeds, reduces mechanical wear, and improves transmission accuracy.

[0035] The drill bit chuck 400 utilizes a multi-jaw chuck design that can accommodate drill rods 410 of varying specifications and provides strong clamping force during installation, ensuring the stability and coaxiality of the drill rod 410. The multi-jaw chuck structure applies uniform clamping force to the drill rod 410 through evenly distributed jaws, preventing the drill rod 410 from shifting during machining.

[0036] Working principle and usage process

[0037] Equipment installation: Fix the support base 100 on the main frame of the vertical machining center to ensure that the entire tool change mechanism is firmly installed. The spindle rod 310 is connected to the output end of the vertical machining center.

[0038] Initial state: In the initial state, the fixed crank plate 210 is fixed, and the movable crank plate 220 can rotate freely around its axis. The drill bit holder 400 is fixed to the tool change assembly 200 through the shaft collar 230, and the drill rod 410 is installed in the drill bit holder 400.

[0039] Tool changing operation:

[0040] When the drill rod 410 needs to be replaced, the operator manually rotates the movable crank plate 220 , and the movable crank plate 220 rotates around its axis on the bottom surface of the fixed crank plate 210 .

[0041] The movable crank plate 220 is rotated until the buckle tongue 211 of the fixed crank plate 210 is aligned with the buckle groove 221 of the movable crank plate 220 , and the buckle tongue 211 is elastically pressed into the buckle groove 221 to achieve locking of the fixed crank plate 210 and the movable crank plate 220 .

[0042] In the locked state, the shaft collar 230 is in one-to-one contact with the driven disk 320 , ensuring that the drill bit holder 400 and the main shaft rod 310 are on the same vertical axis.

[0043] Tool replacement:

[0044] After unlocking, remove the used drill rod 410 and install a new drill rod 410 into the drill clamp 400. Rotate the crank plate 220 again to dock the new drill clamp 400 with the spindle rod 310. The locking tongue 211 elastically deforms and automatically snaps into the corresponding groove 221.

[0045] Workflow:

[0046] After the vertical machining center is started, the main shaft 310 forms a magnetic connection with the driven disk 320 through the permanent magnet 330, and the driven disk 320 drives the drill clamp 400 and the drill rod 410 therein to rotate synchronously to perform the machining operation.

[0047] During the machining process, the bearing ring structure within the shaft sleeve ring 230 ensures the stability of the drill clamp 400, thereby improving the machining accuracy.

[0048] Tool change completed: The entire tool change process is similar to the lens switching of a microscope, which completes the tool change quickly and conveniently. After the tool change, the vertical machining center continues to the next processing operation.

[0049] Throughout this specification, terms such as "one embodiment," "some embodiments," or "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tool changing mechanism for a vertical machining center, characterized in that: include: Support seat (100); The tool changing assembly (200) comprises a fixed curved plate (210), a movable curved plate (220) and a shaft collar (230), wherein the fixed curved plate (210) is fixed to the surface of the support seat (100), the movable curved plate (220) is rotatably mounted on the bottom surface of the fixed curved plate (210), a plurality of shaft collars (230) are provided on the surface of the fixed curved plate (210), the inner side of the shaft collar (230) is rotatably sleeved with a drill bit clamp (400), and the drill bit clamp (400) is used for replacing and installing a drill rod (410); The coupling assembly (300) comprises a main shaft (310) and a driven disc (320). The main shaft (310) is rotatably mounted on the surface of a stator disc (210). The driven disc (320) is fixed to the top of the coupling assembly (300) and rotatably sleeved on the inner side of a shaft collar (230). A plurality of permanent magnets (330) are provided on the inner sides of the main shaft (310) and the driven disc (320). The plurality of permanent magnets (330) on the surfaces of the main shaft (310) and the driven disc (320) are evenly distributed in a circumferential direction, and the magnetic poles of adjacent permanent magnets (330) are in opposite directions. The permanent magnets (330) on the surfaces of the main shaft (310) and the driven disc (320) are arranged relative to each other.

2. The tool changing mechanism of a vertical machining center according to claim 1, characterized in that: A buckle tongue (211) arranged in a vertical direction is fixedly mounted on the surface of the fixed curved plate (210), and a buckle groove (221) corresponding to the shaft sleeve ring (230) is opened on the surface of the movable curved plate (220). The buckle tongue (211) is elastically pressed into the buckle groove (221) to achieve locking of the fixed curved plate (210) and the movable curved plate (220).

3. The tool changing mechanism of a vertical machining center according to claim 1, characterized in that: The fixed curved disk (210) and the movable curved disk (220) are both spherical curved disks, and the fixed curved disk (210) and the movable curved disk (220) are arranged obliquely, and are used to switch the corresponding drill bit clamp (400) and the main shaft (310) to the same vertical axis.

4. The tool changing mechanism of a vertical machining center according to claim 1, characterized in that: A bearing ring structure is provided on the inner side of the shaft sleeve ring (230) for supporting the stable rotation of the drill bit holder (400) during operation.

5. The tool changing mechanism of a vertical machining center according to claim 1, characterized in that: The permanent magnets (330) are arranged in an annular shape, and the permanent magnets (330) of the main shaft (310) and the driven disk (320) are respectively arranged in corresponding annular grooves to enhance the magnetic connection strength between the main shaft (310) and the driven disk (320) and improve transmission stability.

6. The tool changing mechanism of a vertical machining center according to claim 1, characterized in that: The drill bit clamp (400) is a multi-claw clamp structure, which is used for clamping drill bits of different specifications during the installation process of the drill rod (410) and ensures the coaxiality of the drill rod (410) and the drill bit clamp (400).

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