A turret assembly and machine tool

Abstract

The utility model relates to numerical control machine tool technical field discloses a rotary table assembly and machine tool, and rotary table assembly includes the casing, A axis movement mechanism, C axis swing seat, C axis movement mechanism, fixture and power failure brake mechanism, wherein C axis swing seat sets up on A axis movement mechanism, C axis movement mechanism sets up on C axis swing seat, and C axis movement mechanism drives the fixture and rotates along Z axle, and the fixture is used for carrying, fixed work piece, power failure brake mechanism, power failure brake mechanism sets up on the casing, and power failure brake mechanism is used for realizing the quick stop of A axis movement mechanism when power failure. The utility model through integrating power failure brake mechanism on the casing, can trigger the brake function in the moment of system power failure, forces A axis movement mechanism to stop quickly, avoids the work piece position deviation, equipment collision risk caused by inertial swing, improves the security of rotary table assembly under the scene of sudden power failure.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to a rotary table assembly and a machine tool. Background Technology

[0002] In machining, precision positioning, and other fields, turntable assemblies are key equipment for achieving multi-angle machining and precise positioning of workpieces. With the continuous improvement of industrial automation, higher requirements are placed on the accuracy, stability, and safety of turntable assemblies. Existing turntable assemblies typically include motion mechanisms for achieving movement in different directions, with the swing mechanism capable of meeting the machining needs of workpieces at different angles.

[0003] However, in practical applications, existing turntable components exhibit significant safety hazards and functional defects when faced with sudden power outages, circuit failures, or other power loss situations. Due to the lack of a dedicated power-off braking mechanism, the swinging mechanism cannot quickly stop moving after a power failure, instead continuing to swing due to inertia. This can not only lead to deviations in machining accuracy due to positional changes in the workpiece, affecting product quality, but in severe cases, it can also cause moving parts to collide with surrounding equipment, resulting in equipment damage and even endangering the safety of operators. Utility Model Content

[0004] The present invention aims to improve at least one technical problem in the prior art.

[0005] This utility model provides a turntable assembly, including:

[0006] chassis;

[0007] A-axis motion mechanism, wherein the A-axis motion mechanism is mounted on the housing;

[0008] The C-axis swing seat is mounted on the A-axis motion mechanism, and the A-axis motion mechanism drives the C-axis swing seat to swing along the X-axis;

[0009] The C-axis motion mechanism is mounted on the C-axis swing base;

[0010] A fixture is mounted on the C-axis motion mechanism, which drives the fixture to rotate along the Z-axis. The fixture is used to support and fix the workpiece.

[0011] A power failure braking mechanism is provided on the housing and mechanically coupled to the A-axis motion mechanism. The power failure braking mechanism is used to quickly stop the A-axis motion mechanism when power is lost.

[0012] The beneficial effects of this utility model are as follows: By integrating a power failure braking mechanism on the housing, the braking function can be triggered the moment the system loses power, forcing the A-axis motion mechanism to stop quickly, avoiding the risk of workpiece position displacement and equipment collision caused by inertial swing, and improving the safety of the turntable assembly in the event of a sudden power failure.

[0013] As a further improvement to the above technical solution, the A-axis motion mechanism includes a first stator, a first mover, a first driving magnet, a first driving coil, and a first rotating shaft. The first rotating shaft is rotatably mounted on the housing, and the axis of the first rotating shaft is the A-axis. The first stator is mounted on the housing and arranged around the A-axis. The first driving magnet is mounted on the first stator. The first mover is mounted on the first rotating shaft. The first driving coil is mounted on the first mover. The C-axis swing seat is connected to the first rotating shaft. The magnetic field generated by the first driving magnet and the first driving coil interacts, causing the first rotating shaft to swing around the A-axis, thereby causing the C-axis swing seat to swing around the A-axis.

[0014] As a further improvement to the above technical solution, the power-off braking mechanism includes a brake coil, a spring, a pressure plate, a friction disc, a hub, and a cover plate. The brake coil is disposed on the housing and generates electromagnetic force to attract the spring when energized. One end of the spring abuts against the brake coil, and the other end abuts against the pressure plate. In the power-off state, the spring pushes the pressure plate to move axially along the first rotating shaft through elastic force. The pressure plate presses the friction disc under the action of the spring. The friction disc is fixedly connected to the hub. The hub is sleeved on the first rotating shaft and rotates synchronously with the first rotating shaft. The cover plate is disposed on the housing and defines the position of the hub.

[0015] As a further improvement to the above technical solution, a spline is provided on the outer circumferential surface of the first rotating shaft, and a keyway matching the spline is provided in the inner hole of the hub.

[0016] As a further improvement to the above technical solution, the C-axis motion mechanism includes a second stator, a second mover, a second driving magnet, a second driving coil, and a rotary joint. The rotary joint is rotatably mounted on the C-axis swing base, and the axis of the rotary joint is the C-axis. The second stator is mounted on the C-axis swing base and arranged around the C-axis. The second driving magnet is mounted on the second stator. The second mover is mounted on the rotary joint. The second driving coil is mounted on the second mover. The fixture is connected to the rotary joint. The magnetic field generated by the second driving magnet and the second driving coil interacts, causing the rotary joint to rotate around the C-axis, thereby causing the fixture to rotate around the C-axis.

[0017] As a further improvement to the above technical solution, a protective cover is provided on the housing, which covers the power failure braking mechanism.

[0018] As a further improvement to the above technical solution, the turntable assembly also includes a vacuum mechanism, which is disposed on the housing. The surface of the fixture is provided with an air extraction port, which is connected to the vacuum mechanism. The vacuum mechanism is used to form a negative pressure adsorption force on the surface of the fixture.

[0019] This utility model also provides a machine tool, including the above-mentioned rotary table assembly.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is an isometric view of a turntable assembly according to an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of a turntable assembly according to an embodiment of the present invention;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0026] In the attached diagram: 100-machine housing; 200-A-axis motion mechanism; 201-first stator; 202-first mover; 203-first rotating shaft; 2031-spline; 300-C-axis swing seat; 400-C-axis motion mechanism; 401-second stator; 402-second mover; 403-rotary joint; 500-fixture; 501-air extraction port; 601-brake coil; 602-spring; 603-pressure plate; 604-friction plate; 605-hub; 606-cover plate; 700-protective cover. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] The following is combined Figures 1 to 4 The embodiments of this utility model are described below.

[0031] This utility model embodiment provides a turntable assembly, including:

[0032] Casing 100;

[0033] A-axis motion mechanism 200, which is mounted on the housing 100;

[0034] C-axis swing seat 300 is mounted on A-axis motion mechanism 200, and A-axis motion mechanism 200 drives C-axis swing seat 300 to swing along X-axis;

[0035] C-axis motion mechanism 400, wherein the C-axis motion mechanism 400 is mounted on the C-axis swing base 300;

[0036] A fixture 500 is mounted on the C-axis motion mechanism 400, which drives the fixture 500 to rotate along the Z-axis. The fixture 500 is used to support and fix the workpiece.

[0037] A power failure braking mechanism is provided on the housing 100 and mechanically coupled to the A-axis motion mechanism. The power failure braking mechanism is used to quickly stop the A-axis motion mechanism 200 when power is lost.

[0038] This embodiment integrates a power failure braking mechanism on the housing 100, which can trigger the braking function the moment the system loses power, forcing the A-axis motion mechanism 200 to stop quickly, avoiding the risk of workpiece position displacement and equipment collision caused by inertial swing, and improving the safety of the turntable assembly in the event of a sudden power failure.

[0039] Further, the A-axis motion mechanism 200 includes a first stator 201, a first mover 202, a first driving magnet, a first driving coil, and a first rotating shaft 203. The first rotating shaft 203 is rotatably mounted on the housing 100, and the axis of the first rotating shaft 203 is the A-axis. The first stator 201 is mounted on the housing and arranged around the A-axis. The first driving magnet is mounted on the first stator 201. The first mover 202 is mounted on the first rotating shaft 203. The first driving coil is mounted on the first mover 202. The C-axis swing seat 300 is connected to the first rotating shaft 203. The magnetic field generated by the first driving magnet and the first driving coil interacts, causing the first rotating shaft 203 to swing around the A-axis, thereby causing the C-axis swing seat 300 to swing around the A-axis.

[0040] In this embodiment, the A-axis motion mechanism 200 drives the first rotating shaft 203 to swing by the interaction of the magnetic field generated by the first driving magnet and the first driving coil. Compared with traditional mechanical transmission methods such as gears and worm gears, it can improve the sensitivity of A-axis swing. At the same time, the axially arranged drive assembly has a compact structure, which reduces the rotational inertia of the moving parts, making the A-axis motion mechanism 200 respond faster and suitable for high-frequency swing processing scenarios.

[0041] Further, the power-off braking mechanism includes a brake coil 601, a spring 602, a pressure plate 603, a friction plate 604, a hub 605, and a cover plate 606. The brake coil 601 is disposed on the housing 100. The brake coil 601 is used to generate electromagnetic force to attract the spring 602 when energized. One end of the spring 602 abuts against the brake coil 601, and the other end of the spring 602 abuts against the pressure plate 603. The spring 602 is used to brake when power is lost. In the state, the pressure plate 603 is pushed to move axially along the first rotating shaft 203 by elastic force. The pressure plate 603 is used to press the friction plate 604 under the action of the spring plate 602. The friction plate 604 is fixedly connected to the hub 605. The hub 605 is sleeved on the first rotating shaft 203 and rotates synchronously with the first rotating shaft 203. The cover plate 606 is disposed on the housing 100 and is used to limit the position of the hub 605.

[0042] In this embodiment, when the brake coil 601 is energized, it attracts the spring 602 by electromagnetic force. When de-energized, the elastic force of the spring 602 pushes the pressure plate 603 to press against the friction plate 604, forcing the wheel hub 605 (which rotates synchronously with the first rotating shaft 203) to stop moving through frictional torque. This structure can achieve de-energized braking without an additional power source, with a short response time and stable braking torque. Compared with traditional electric or hydraulic brakes, the de-energized braking mechanism of this embodiment has the advantages of simple structure, high reliability, and low maintenance cost, and is especially suitable for precision machining equipment with extremely high safety requirements.

[0043] Furthermore, a spline 2031 is provided on the outer peripheral surface of the first rotating shaft 203, and a keyway matching the spline 2031 is provided in the inner hole of the hub 605.

[0044] In this embodiment, the spline 2031 on the outer periphery of the first rotating shaft 203 engages with the keyway in the inner hole of the hub 605 to form a rigid connection structure, ensuring that the hub 605 and the first rotating shaft 203 rotate synchronously without slippage, effectively transmitting the frictional torque of the braking mechanism and the driving torque of the A-axis motion mechanism 200.

[0045] Further, the C-axis motion mechanism 400 includes a second stator 401, a second mover 402, a second driving magnet, a second driving coil, and a rotary joint 403. The rotary joint 403 is rotatably mounted on the C-axis swing base 300, and the axis of the rotary joint 403 is the C-axis. The second stator 401 is mounted on the C-axis swing base 300 and arranged around the C-axis. The second driving magnet is mounted on the second stator 401. The second mover 402 is mounted on the rotary joint 403. The second driving coil is mounted on the second mover 402. The fixture 500 is connected to the rotary joint 403. The magnetic field generated by the second driving magnet and the second driving coil interacts, causing the rotary joint 403 to rotate around the C-axis, thereby causing the fixture 500 to rotate around the C-axis.

[0046] In this embodiment, the C-axis motion mechanism 400 enables the fixture 500 to rotate around the Z-axis with high precision. The rotary joint 403 eliminates the radial clearance of traditional bearings. Combined with the contactless transmission characteristics of magnetic field drive, the precision of the C-axis motion mechanism 400 is improved.

[0047] Furthermore, a protective cover 700 is provided on the housing 100, which covers the power failure braking mechanism.

[0048] In this embodiment, a protective cover 700 is provided to cover the power failure braking mechanism, which can effectively isolate contaminants generated during the processing from affecting the braking components and thus affecting the reliability of the power failure braking mechanism; this enclosed design can also reduce the impact of external vibration on the power failure braking mechanism.

[0049] Furthermore, the turntable assembly also includes a vacuum mechanism, which is disposed on the housing 100. The surface of the fixture 500 is provided with an air extraction port 501, which is connected to the vacuum mechanism. The vacuum mechanism is used to form a negative pressure adsorption force on the surface of the fixture 500.

[0050] In this embodiment, the suction port 501 on the surface of the fixture 500 is connected to the vacuum mechanism, forming a negative pressure adsorption force on the surface of the fixture 500. This allows for the rapid fixing of various machined parts (especially irregularly shaped parts, thin-walled parts, or non-metallic materials), avoiding the workpiece deformation problem caused by uneven clamping force in traditional mechanical fixtures. The vacuum adsorption method has the advantage of fast response speed, simplifies the workpiece clamping process, and thus improves production efficiency. The vacuum mechanism described in this embodiment includes a vacuum pump, a solenoid valve, and a gas pipeline. The gas pipeline passes through the rotary joint 403 and is connected to the suction port 501. The solenoid valve is used to control the start and stop of the negative pressure adsorption force.

[0051] This embodiment also provides a machine tool, including the aforementioned rotary table assembly.

[0052] After integrating the aforementioned rotary table assembly into the machine tool, the machine tool can lock the C-axis swing seat 300 position through the power failure braking mechanism in the event of a sudden power failure, effectively improving the machining adaptability of the machine tool.

[0053] The preferred embodiments of the present invention have been described in detail above, but the present disclosure is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present disclosure.

Claims

1. A turntable assembly, characterized in that, include: chassis; A-axis motion mechanism, wherein the A-axis motion mechanism is mounted on the housing; The C-axis swing seat is mounted on the A-axis motion mechanism, and the A-axis motion mechanism drives the C-axis swing seat to swing along the X-axis; The C-axis motion mechanism is mounted on the C-axis swing base; A fixture is mounted on the C-axis motion mechanism, which drives the fixture to rotate along the Z-axis. The fixture is used to support and fix the workpiece. A power failure braking mechanism is provided on the housing and mechanically coupled to the A-axis motion mechanism. The power failure braking mechanism is used to quickly stop the A-axis motion mechanism when power is lost.

2. The turntable assembly according to claim 1, characterized in that, The A-axis motion mechanism includes a first stator, a first mover, a first driving magnet, a first driving coil, and a first rotating shaft. The first rotating shaft is rotatably mounted on the housing, and its axis is the A-axis. The first stator is mounted on the housing and arranged around the A-axis. The first driving magnet is mounted on the first stator. The first mover is mounted on the first rotating shaft. The first driving coil is mounted on the first mover. The C-axis swing seat is connected to the first rotating shaft. The magnetic fields generated by the first driving magnet and the first driving coil interact, causing the first rotating shaft to swing around the A-axis, which in turn causes the C-axis swing seat to swing around the A-axis.

3. The turntable assembly according to claim 2, characterized in that, The power-off braking mechanism includes a brake coil, a spring, a pressure plate, a friction disc, a hub, and a cover plate. The brake coil is mounted on the housing and generates electromagnetic force to attract the spring when energized. One end of the spring abuts against the brake coil, and the other end abuts against the pressure plate. In the power-off state, the spring pushes the pressure plate to move axially along the first rotating shaft through elastic force. The pressure plate presses the friction disc against the spring. The friction disc is fixedly connected to the hub, which is sleeved on the first rotating shaft and rotates synchronously with it. The cover plate is mounted on the housing and defines the position of the hub.

4. The turntable assembly according to claim 3, characterized in that, The outer circumferential surface of the first shaft is provided with splines, and the inner hole of the hub is provided with a keyway that matches the splines.

5. The turntable assembly according to claim 1, characterized in that, The C-axis motion mechanism includes a second stator, a second mover, a second driving magnet, a second driving coil, and a rotary joint. The rotary joint is rotatably mounted on the C-axis swing base, and the axis of the rotary joint is the C-axis. The second stator is mounted on the C-axis swing base and arranged around the C-axis. The second driving magnet is mounted on the second stator. The second mover is mounted on the rotary joint. The second driving coil is mounted on the second mover. The fixture is connected to the rotary joint. The magnetic fields generated by the second driving magnet and the second driving coil interact, causing the rotary joint to rotate around the C-axis, and in turn, causing the fixture to rotate around the C-axis.

6. The turntable assembly according to claim 1, characterized in that, The housing is provided with a protective cover, which covers the power failure braking mechanism.

7. The turntable assembly according to claim 1, characterized in that, The turntable assembly also includes a vacuum mechanism, which is disposed on the housing. The surface of the fixture is provided with an air extraction port, which is connected to the vacuum mechanism. The vacuum mechanism is used to form a negative pressure adsorption force on the surface of the fixture.

8. A machine tool, characterized in that, Includes the turntable assembly as described in any one of claims 1-7.

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