Five-axis rotary table driven by axial flux motor

Abstract

According to the five-axis rotary table driven by the axial magnetic flux motor, the five-axis rotary table is arranged between the driving end of a first driving motor and a tailstock, a second driving motor is arranged in the five-axis rotary table and used for driving the rotary table to rotate, and the second driving motor is the axial magnetic flux motor; the second driving motor comprises a motor stator, a coil winding and a motor rotor, the motor rotor is arranged at one end of a rotating shaft in the five-axis turntable, the motor stator is arranged at the end, away from the rotating shaft, of the motor rotor, the coil winding is arranged on the motor stator, and the rotating shaft, the motor stator and the motor rotor are coaxially arranged. The thickness is reduced, the distance between the first driving motor and the gravity center of the five-axis turntable is shortened, and the energy consumption is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of five-axis turntables, and more specifically, to a five-axis turntable driven by an axial flux motor. Background Art

[0002] The five-axis cradle turntable is a type of CNC turntable and is an essential component of a five-axis machine tool. The axis that rotates around the X-axis is defined as the A-axis, and the axis that rotates around the Z-axis is defined as the C-axis. The five-axis cradle turntable meets the needs of processing complex parts through the combined motion of the A-axis and the C-axis, plus the coordinated motion of the X, Y, and Z axes of the machine tool.

[0003] The closest technology to the existing one is, announcement number: CN213615284U, a spliced ​​cradle five-axis turntable, which discloses an A-axis torque motor and a tailstock that are set apart from each other, a horizontally placed base is provided between the A-axis torque motor and the tailstock, a C-axis torque motor is positioned and installed in the center hole of the base, a dial is fixedly connected to the output shaft end of the C-axis torque motor, a first fixed plate is fixedly connected to one end of the base near the A-axis torque motor, a second fixed plate is fixedly connected to one end of the base near the tailstock, the center hole of the first fixed plate is fixedly connected to the center axis of the A-axis torque motor, and the second fixed plate is rotatably connected to the tailstock. The utility model splits the traditional integral C-axis box into a base, a first fixed plate and a second fixed plate.

[0004] The existing five-axis turntable uses a C-axis mechanical reducer or a traditional torque motor. The turntable is heavy, the torque that can be output in a limited space is small, the required driving force is large, and the energy consumption is high. At the same time, the use of a C-axis traditional torque motor makes the turntable thicker, which makes the axis of the A-axis torque motor farther away from the center of gravity of the turntable. The A-axis requires a larger current and higher torque to drive the swing arm shaft, and the manufacturing cost and energy waste of the A-axis will be higher. At the same time, the five-axis CNC machine tool is restricted by the overall size, so it is necessary to generate huge torque to drive the turntable in the limited workspace to further improve the processing speed of parts and generate higher production benefits.

[0005] In view of this, the present invention proposes a five-axis turntable with low energy consumption and light weight, which is driven by an axial flux motor. Summary of the invention

[0006] The purpose of the present invention is to provide a five-axis turntable with low energy consumption and light weight, which is driven by an axial flux motor.

[0007] A five-axis turntable driven by an axial flux motor comprises a five-axis turntable 1, a first drive motor 2, a tailstock 3, and a second drive motor 4. The invention is characterized in that: a five-axis turntable 1 is arranged between a driving end of the first drive motor 2 and the tailstock 3, a second drive motor 4 is arranged in the five-axis turntable 1, the second drive motor 4 is used to drive the turntable to rotate, the second drive motor 4 is an axial flux motor, the second drive motor 4 comprises a motor stator 5, a coil winding 6, and a motor rotor 7, a motor rotor 7 is arranged at one end of a rotating shaft 8 in the five-axis turntable 1, a motor stator 5 is arranged at an end of the motor rotor 7 away from the rotating shaft, a coil winding 6 is arranged on the motor stator 5, and the rotating shaft 8, the motor stator 5, and the motor rotor 7 are coaxially arranged.

[0008] Furthermore, the first drive motor 2 is an axial flux motor or a common motor, and the axial flux motor is more preferably used.

[0009] In some embodiments, an iron core is provided in the motor stator 5, and the iron core of the motor stator 5 is made of silicon steel sheet material. The axial flux motor is used on the C axis, but can also be used on the A axis or tailstock. This structure can be applicable to any rotary drive structure.

[0010] In some embodiments, the motor rotor 7 includes a motor rotor yoke 71 and a motor rotor permanent magnet 72. A motor rotor yoke 71 is provided at one end of the rotating shaft 8 in the five-axis turntable 1. A motor rotor permanent magnet 72 is mounted on the motor rotor yoke 71. The motor rotor permanent magnet 72 is arranged along the circumference of the motor rotor yoke 71.

[0011] In some embodiments, a gap is provided between the motor rotor yoke 71 and the magnetic flux surface of the motor stator 5 core, and the gap is 0.05-5.0 mm.

[0012] In some embodiments, the motor rotor permanent magnets 72 and the magnetic flux surfaces of the coil windings 6 are arranged face to face, and there are multiple groups of permanent magnets and coil windings 6 .

[0013] In some embodiments, the motor rotor permanent magnet 72 is arranged in one of the axial single-sided, axial double-sided or three-sided arrangements. When the motor rotor permanent magnet 72 is arranged in a single-sided axial arrangement, only a single coil winding 6 is arranged accordingly; when the motor rotor permanent magnet 72 is arranged in a double-sided axial arrangement, both sides have face-to-face coil windings 6; when the motor rotor permanent magnet 72 is arranged in a three-sided arrangement on the top, bottom and side, face-to-face coil windings 6 are arranged on all three sides, so that the motor is driven in a hybrid manner in the axial and radial directions.

[0014] In some embodiments, a brake structure 9 is further provided between the rotating shaft 8 in the five-axis turntable 1 and the driving end of the second driving motor 4 , and the brake structure 9 is used to brake the rotating shaft 8 of the five-axis turntable 1 .

[0015] In some embodiments, the coil winding 6 is wound on the iron core of the motor stator 5, and epoxy resin glue is poured between the coil winding 6 and the iron core of the motor stator 5. The epoxy resin glue plays a role in preventing dust, water, and preventing the enameled wire of the coil winding 6 from being damaged.

[0016] In some embodiments, the rotating shaft 8 in the five-axis turntable 1 is also fixedly connected to a ring encoder 10, which controls the rotation speed and position of the motor. The ring encoder 10 is one of a magnetic grating, a time grating, and a grating.

[0017] In some embodiments, a liquid cooling channel 11 is provided inside or outside the iron core and the coil winding 6 of the motor stator 5. The liquid cooling channel 11 forms a circulation through a pipeline and an external heat exchanger. One end of the liquid cooling channel 11 takes away the heat generated by the second drive motor 4, and the other end of the liquid cooling channel 11 circulates the coolant cooled by the heat exchanger to the outside of the second drive motor 4 for continuous cooling.

[0018] Beneficial effects of the present invention: The present invention proposes a five-axis turntable driven by an axial flux motor, a five-axis turntable 1 is arranged between the driving end of the first drive motor 2 and the tailstock 3, a second drive motor 4 is arranged in the five-axis turntable 1, the second drive motor 4 is used to drive the turntable to rotate, the second drive motor 4 is an axial flux motor, the second drive motor 4 includes a motor stator 5, a coil winding 6, and a motor rotor 7, a motor rotor 7 is arranged at one end of a rotating shaft 8 in the five-axis turntable 1, a motor stator 5 is arranged at the end of the motor rotor 7 away from the rotating shaft, a coil winding 6 is arranged on the motor stator 5, the rotating shaft 8, the motor stator 5, and the motor rotor 7 are coaxially arranged, and the five-axis turntable driven by the axial flux motor reduces the self-weight of the turntable, and the thickness is reduced, the distance between the center of gravity of the first drive motor and the five-axis turntable 1 is shortened, and the energy consumption is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a schematic diagram of the overall structure of a five-axis turntable driven by an axial flux motor according to embodiments 1 and 2.

[0020] Figure 2 It is a side view of a five-axis turntable driven by an axial flux motor according to embodiments 1 and 2.

[0021] Figure 3 This is the A1-A1 cross-sectional view of a five-axis turntable driven by an axial flux motor according to Example 1.

[0022] Figure 4 This is a schematic diagram of the structure of a second drive motor of a five-axis turntable driven by an axial flux motor according to Example 1.

[0023] Figure 5This is a top view of a second drive motor of a five-axis turntable driven by an axial flux motor according to Example 1.

[0024] Figure 6 This is a B2-B2 cross-sectional view of a second drive motor of a five-axis turntable driven by an axial flux motor according to Example 1.

[0025] Figure 7 This is an exploded structural diagram of a second drive motor of a five-axis turntable driven by an axial flux motor according to Example 1.

[0026] Figure 8 This is a B1-B1 cross-sectional view of a five-axis turntable driven by an axial flux motor according to Example 2.

[0027] Fig. 9 This is a schematic diagram of the structure of a second drive motor for a five-axis turntable driven by an axial flux motor according to Example 2.

[0028] Fig.10 This is a top view of a second drive motor of a five-axis turntable driven by an axial flux motor according to Example 2.

[0029] Fig.11 This is a B2-B2 cross-sectional view of a second drive motor of a five-axis turntable driven by an axial flux motor according to Example 2.

[0030] Main component symbols

[0031] Five-axis turntable 1, a first drive motor 2, a tailstock 3, a second drive motor 4, a motor stator 5, a coil winding 6, a motor rotor 7, a motor rotor yoke 71, a motor rotor permanent magnet 72, a rotating shaft 8, a brake structure 9, a ring encoder 10, and a liquid cooling channel 11.

[0032] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0033] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0034] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including within a single system or component).

[0035] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0036] like Figure 1-7 , which is a schematic structural diagram of a five-axis turntable driven by an axial flux motor according to Embodiment 1.

[0037] If the first drive motor 2 in this embodiment is an axial flux motor, the axial flux motor is used on the C axis, but it can also be used on the A axis or the tailstock. This structure can be applicable to any rotation drive structure. A five-axis turntable driven by an axial flux motor, a five-axis turntable 1, a first drive motor 2, a tailstock 3, and a second drive motor 4, characterized in that: a five-axis turntable 1 is provided between the driving end of the first drive motor 2 and the tailstock 3, a second drive motor 4 is provided in the five-axis turntable 1, the second drive motor 4 is used to drive the turntable to rotate, the second drive motor 4 is an axial flux motor, the second drive motor 4 includes a motor stator 5, a coil winding 6, and a motor rotor 7, a motor rotor 7 is provided at one end of a rotating shaft 8 in the five-axis turntable 1, a motor stator 5 is provided at the end of the motor rotor 7 away from the rotating shaft, a coil winding 6 is provided on the motor stator 5, and the rotating shaft 8, the motor stator 5, and the motor rotor 7 are coaxially arranged.

[0038] The first drive motor 2 is an axial flux motor or a common motor, and the axial flux motor is more preferably used.

[0039] An iron core is arranged inside the motor stator 5, and the iron core of the motor stator 5 is made of silicon steel sheet material.

[0040] The motor rotor 7 includes a motor rotor yoke 71 and a motor rotor permanent magnet 72 . The motor rotor yoke 71 is provided at one end of the rotating shaft 8 in the five-axis turntable 1 . The motor rotor permanent magnet 72 is mounted on the motor rotor yoke 71 . The motor rotor permanent magnet 72 is arranged along the circumference of the motor rotor yoke 71 .

[0041] A gap is provided between the motor rotor yoke 71 and the magnetic flux surface of the motor stator 5 core, and the gap is 0.05-5.0 mm.

[0042] The motor rotor permanent magnets 72 and the magnetic flux surfaces of the coil windings 6 are arranged face to face, and there are multiple groups of permanent magnets and coil windings 6.

[0043] When the motor rotor permanent magnets 72 are arranged on the top, bottom and side surfaces, a coil winding 6 is arranged face to face on each of the three surfaces, so that the motor can be driven in a hybrid manner in the axial and radial directions.

[0044] A brake structure 9 is further provided between the rotating shaft 8 in the five-axis turntable 1 and the driving end of the second driving motor 4 , and the brake structure 9 is used to brake the rotating shaft 8 of the five-axis turntable 1 .

[0045] The coil winding 6 is wound on the iron core of the motor stator 5 , and epoxy resin glue is poured between the coil winding 6 and the iron core of the motor stator 5 . The epoxy resin glue plays the role of preventing dust, water and preventing the enameled wire of the coil winding 6 from being damaged.

[0046] The rotating shaft 8 in the five-axis turntable 1 is also fixedly connected with an annular encoder 10, which plays a role in controlling the rotation speed and position of the motor. The annular encoder 10 is one of a magnetic grating, a time grating, and a grating.

[0047] A liquid cooling channel 11 is provided inside or outside the iron core and coil winding 6 of the motor stator 5. The liquid cooling channel 11 forms a circulation through a pipeline and an external heat exchanger. One end of the liquid cooling channel 11 takes away the heat generated by the second drive motor 4, and the other end of the liquid cooling channel 11 circulates the coolant cooled by the heat exchanger to the outside of the second drive motor 4 for continuous cooling. Embodiment 2:

[0048] like Figure 1 , Figure 2 , Figure 8-11 The figure is a schematic diagram of the structure of a five-axis turntable driven by an axial flux motor according to the second embodiment.

[0049] If the first drive motor 2 in this embodiment is an axial flux motor, the axial flux motor is used on the C axis, but it can also be used on the A axis or the tailstock. This structure can be applicable to any rotation drive structure. A five-axis turntable driven by an axial flux motor, a five-axis turntable 1, a first drive motor 2, a tailstock 3, and a second drive motor 4, characterized in that: a five-axis turntable 1 is provided between the driving end of the first drive motor 2 and the tailstock 3, a second drive motor 4 is provided in the five-axis turntable 1, the second drive motor 4 is used to drive the turntable to rotate, the second drive motor 4 is an axial flux motor, the second drive motor 4 includes a motor stator 5, a coil winding 6, and a motor rotor 7, a motor rotor 7 is provided at one end of a rotating shaft 8 in the five-axis turntable 1, a motor stator 5 is provided at the end of the motor rotor 7 away from the rotating shaft, a coil winding 6 is provided on the motor stator 5, and the rotating shaft 8, the motor stator 5, and the motor rotor 7 are coaxially arranged.

[0050] The first drive motor 2 is an axial flux motor or a common motor, and the axial flux motor is more preferably used.

[0051] An iron core is arranged inside the motor stator 5, and the iron core of the motor stator 5 is made of silicon steel sheet material.

[0052] The motor rotor 7 includes a motor rotor yoke 71 and a motor rotor permanent magnet 72 . The motor rotor yoke 71 is provided at one end of the rotating shaft 8 in the five-axis turntable 1 . The motor rotor permanent magnet 72 is mounted on the motor rotor yoke 71 . The motor rotor permanent magnet 72 is arranged along the circumference of the motor rotor yoke 71 .

[0053] A gap is provided between the motor rotor yoke 71 and the motor stator 5 core, and the gap is 0.05-5.0 mm.

[0054] The motor rotor permanent magnets 72 and the magnetic flux surfaces of the coil windings 6 are arranged face to face, and there are multiple groups of permanent magnets and coil windings 6.

[0055] When the motor rotor permanent magnet 72 is arranged on a single side in the axial direction, only a single coil winding 6 is arranged accordingly.

[0056] A brake structure 9 is further provided between the rotating shaft 8 in the five-axis turntable 1 and the driving end of the second driving motor 4 , and the brake structure 9 is used to brake the rotating shaft 8 of the five-axis turntable 1 .

[0057] The coil winding 6 is wound on the iron core of the motor stator 5 , and epoxy resin glue is poured between the coil winding 6 and the iron core of the motor stator 5 . The epoxy resin glue plays the role of preventing dust, water and preventing the enameled wire of the coil winding 6 from being damaged.

[0058] The rotating shaft 8 in the five-axis turntable 1 is also fixedly connected with an annular encoder 10, which plays a role in controlling the rotation speed and position of the motor. The annular encoder 10 is one of a magnetic grating, a time grating, and a grating.

[0059] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art, and several modifications and improvements may be made without departing from the concept of the present application, all of which belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustration and are not intended to limit the present application. The actual protection scope of the present application shall be subject to the claims.

Claims

1. A five-axis turntable driven by an axial flux motor, comprising a five-axis turntable (1), a first drive motor (2), a tailstock (3), and a second drive motor (4), characterized in that: A five-axis turntable (1) is provided between a driving end of a first driving motor (2) and a tailstock (3). A second driving motor (4) is provided in the five-axis turntable (1). The second driving motor (4) is used to drive the turntable to rotate. The second driving motor (4) is an axial magnetic flux motor. The second driving motor (4) comprises a motor stator (5), a coil winding (6), and a motor rotor (7). The motor rotor (7) is provided at one end of a rotating shaft (8) in the five-axis turntable (1). The motor stator (5) is provided at an end of the motor rotor (7) away from the rotating shaft. The coil winding (6) is provided on the motor stator (5). The rotating shaft (8), the motor stator (5), and the motor rotor (7) are coaxially arranged.

2. The five-axis turntable driven by an axial flux motor as claimed in claim 1, characterized in that: An iron core is arranged inside the motor stator (5), and the iron core of the motor stator (5) is made of silicon steel sheet material. The axial flux motor is used on the C axis, but can also be used on the A axis or the tailstock. This structure can be applied to any rotary drive structure.

3. The five-axis turntable driven by an axial flux motor as claimed in claim 1, characterized in that: The motor rotor (7) comprises a motor rotor yoke (71) and a motor rotor permanent magnet (72); one end of the rotating shaft (8) in the five-axis turntable (1) is provided with the motor rotor yoke (71); the motor rotor permanent magnet is mounted on the motor rotor yoke (71); and the motor rotor permanent magnet (72) is arranged along the circumference of the motor rotor yoke (71).

4. The five-axis turntable driven by an axial flux motor as claimed in claim 3, characterized in that: A gap is provided between the motor rotor yoke (71) and the magnetic flux surface of the motor stator (5) iron core, and the gap is 0.05-5.0 mm.

5. The five-axis turntable driven by an axial flux motor as claimed in claim 3, characterized in that: The magnetic flux surfaces of the motor rotor permanent magnet (72) and the coil winding (6) are arranged face to face, and there are multiple groups of permanent magnets and coil windings (6).

6. The five-axis turntable driven by an axial flux motor as claimed in claim 3, characterized in that: The motor rotor permanent magnet (72) is arranged on one side in the axial direction, on two sides in the axial direction, or on three sides in the axial direction. When the motor rotor permanent magnet (72) is arranged on one side in the axial direction, only a single coil winding (6) is arranged accordingly; when the motor rotor permanent magnet (72) is arranged on two sides in the axial direction, face-to-face coil windings (6) are arranged on both sides; when the motor rotor permanent magnet (72) is arranged on three sides, namely, on the top, bottom, and side, face-to-face coil windings (6) are arranged on all three sides, so that the motor is driven in a hybrid manner in the axial direction and in the radial direction.

7. The five-axis turntable driven by an axial flux motor as claimed in claim 1, characterized in that: A brake structure (9) is also provided between the rotating shaft (8) in the five-axis turntable (1) and the driving end of the second driving motor (4), and the brake structure (9) is used to brake the rotating shaft (8) of the five-axis turntable (1).

8. The five-axis turntable driven by an axial flux motor as claimed in claim 1, characterized in that: The coil winding (6) is wound on the iron core of the motor stator (5), and epoxy resin glue is poured between the coil winding (6) and the iron core of the motor stator (5). The epoxy resin glue has the functions of preventing dust and water, and preventing the enameled wire of the coil winding (6) from being damaged.

9. The five-axis turntable driven by an axial flux motor as claimed in claim 1, characterized in that: The rotating shaft (8) in the five-axis turntable (1) is also fixedly connected to a ring encoder (10), which plays a role in controlling the rotation speed and position of the motor. The ring encoder (10) is one of a magnetic grating, a time grating, and an optical grating.

10. The five-axis turntable driven by an axial flux motor as claimed in claim 1, characterized in that: A liquid cooling channel (11) is provided inside or outside the iron core and the coil winding (6) of the motor stator (5). The liquid cooling channel (11) forms a circulation through a pipeline and an external heat exchanger. One end of the liquid cooling channel (11) takes away the heat generated by the second drive motor (4), and the other end of the liquid cooling channel (11) circulates the coolant cooled by the heat exchanger to the outside of the second drive motor (4) for continuous cooling.

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