Direct drive cradle five-axis numerical control rotary table structure

Abstract

The utility model provides a kind of direct-drive cradle five-axis numerical control rotary table structure, comprising: A axis, C axis, first tailstock;The two sides of C axis are respectively provided with first rocker arm and second rocker arm, first rocker arm is installed on first tailstock, second rocker arm is installed on A axis;A axis includes first motor, and the output shaft of this first motor is provided with several first mounting holes;Second rocker arm is provided with several first bolt, first bolt is installed in first mounting hole, for second rocker arm is installed on the output shaft of first motor, so that first motor directly drives second rocker arm rotation and then drives C axis rotation;The C axis includes second motor, and the output shaft of this second motor is perpendicular to the output shaft of first motor setting.The utility model provides a kind of direct-drive cradle five-axis numerical control rotary table structure, through optimization design and the selection of high-precision component, realize the advantages, such as simple structure, easy to install, small, high precision, high rigid brake system, fast response and low noise.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining equipment technology, specifically to a direct-drive cradle five-axis CNC rotary table structure. Background Technology

[0002] With the development of modern manufacturing, the requirements for CNC machine tools are becoming increasingly stringent, especially the demand for five-axis CNC machine tools. Five-axis CNC machine tools are widely used in industries such as aerospace, automotive, and mold making because they can complete the machining of complex curved surfaces in a single setup. Among these, the direct-drive cradle five-axis CNC rotary table, as one of the core components of a five-axis CNC machine tool, directly affects the machining accuracy, efficiency, and stability of the entire machine.

[0003] The shortcomings of existing technology:

[0004] 1. Complex bearing assembly: Most direct-drive rotary tables on the market use a combination of multiple deep groove ball bearings or tapered roller bearings to limit axial, radial, and overturning moments. While this design meets the usage requirements to some extent, it has the following problems:

[0005] Complex processing: The combination of multiple bearings increases the difficulty of processing, leading to higher production costs.

[0006] Large size: The complex bearing assembly increases the overall size of the turntable, occupying more space.

[0007] Assembly difficulties: The assembly process of multiple parts is complex and prone to assembly errors, which can affect the final accuracy.

[0008] Insufficient precision: Due to the complexity of assembly and processing, it is difficult to achieve the expected high precision requirements.

[0009] 2. Limitations of the braking system:

[0010] Poor brake rigidity: Existing braking systems typically use ordinary brake pads, which lack rigidity, are prone to wear, and have a short service life.

[0011] Inappropriate brake position: The brake system is usually close to the encoder assembly. The impact force generated during braking will directly affect the accuracy of the encoder, thereby affecting the accuracy of the entire turntable.

[0012] Inconvenient maintenance: The structural design of the braking system makes it difficult to maintain and replace brake pads, increasing maintenance costs.

[0013] 3. Complex structure:

[0014] Installation is inconvenient: The existing turntable structure is complex and the installation process is cumbersome, requiring professional technicians to operate, which increases installation time and cost.

[0015] Difficult to debug and maintain: The complex structure makes later debugging and maintenance difficult, affecting the reliability and service life of the equipment.

[0016] Therefore, existing technologies have shortcomings and need further improvement. Utility Model Content

[0017] To address the problems existing in the prior art, this utility model provides a direct-drive cradle five-axis CNC turntable structure.

[0018] To achieve the above objectives, the specific solution of this utility model is as follows:

[0019] This utility model provides a direct-drive cradle five-axis CNC turntable structure, including:

[0020] A-axis, C-axis, first tailstock;

[0021] A first rocker arm and a second rocker arm are respectively provided on both sides of the C-axis. The first rocker arm is mounted on the first tailstock and the second rocker arm is mounted on the A-axis.

[0022] The A-axis includes a first motor, and the output shaft of the first motor is provided with a plurality of first mounting holes;

[0023] The second rocker arm is provided with a plurality of first bolts, which are installed in the first mounting holes for mounting the second rocker arm on the output shaft of the first motor, so that the first motor can directly drive the second rocker arm to rotate and thus drive the C-axis to rotate.

[0024] The C-axis includes a second motor, the output shaft of which is arranged perpendicular to the output shaft of the first motor.

[0025] Furthermore, the A-axis and the first tailstock are also mounted on a base.

[0026] Furthermore, the A-axis also includes a first housing, a first bearing, a first brake cylinder, and a first brake assembly;

[0027] The first motor is installed in the first housing, and a first bearing is provided between the output shaft of the first motor and the first housing.

[0028] The first brake cylinder is mounted on the first housing, and the first brake assembly is mounted on the output shaft of the first motor for braking the output shaft of the first motor and rotating together with the output shaft;

[0029] The first brake assembly includes a protective pad, a brake pad, and a barrier pad, wherein the brake pad is disposed between the protective pad and the barrier pad;

[0030] The piston rod of the first brake cylinder extends out and abuts against the protective plate to perform braking.

[0031] Furthermore, the A-axis also includes a first encoder assembly, which includes a first encoder mover and a first encoder stator;

[0032] The first encoder mover is mounted on the tail end of the output shaft of the first motor and rotates together with the output shaft of the first motor. The first encoder stator is mounted on the first housing.

[0033] Furthermore, the C-axis also includes a second housing, a second bearing, a second brake cylinder, and a second brake assembly;

[0034] The second motor is installed in the second housing, and a second bearing is provided between the output shaft of the second motor and the second housing;

[0035] The second brake cylinder is mounted on the second housing, and the second brake assembly is mounted on the output shaft of the second motor for braking the output shaft of the second motor and rotating together with the output shaft;

[0036] The second brake assembly includes a protective pad, a brake pad, and a barrier pad, with the brake pad positioned between the protective pad and the barrier pad;

[0037] The piston rod of the second brake cylinder extends out and abuts against the protective plate to perform braking.

[0038] Furthermore, the C-axis also includes a second encoder assembly, which includes a second encoder mover and a second encoder stator;

[0039] The second encoder mover is mounted on the tail end of the output shaft of the second motor and rotates together with the output shaft of the second motor. The second encoder stator is mounted on the second housing.

[0040] Furthermore, a first flange is also installed at the front end of the output shaft of the second motor.

[0041] Furthermore, a tailstock spindle is rotatably provided on the first tailstock, and the first rocker arm is mounted on the tailstock spindle;

[0042] A third brake assembly is also provided on the first tailstock at the tail of the tailstock main shaft for braking the tailstock main shaft.

[0043] Furthermore, a cable outlet cover is provided on the outside of the first housing for cable routing.

[0044] Furthermore, the brake pads are made of manganese steel.

[0045] The technical solution of this utility model has the following beneficial effects:

[0046] 1. Simple structure and easy installation:

[0047] Cradle-type suspension structure: The A-axis and C-axis are assembled by plane suspension, which simplifies the manufacturing process and facilitates debugging and later maintenance.

[0048] Integrated design: The A-axis and the first tailstock are mounted on the same base, making the overall structure more compact and easier to install.

[0049] Small size and small footprint:

[0050] Optimized design: Through reasonable design, unnecessary parts have been reduced, resulting in a smaller turntable size and saving installation space.

[0051] 2. High precision:

[0052] Encoder assemblies: Both the A-axis and C-axis are equipped with encoder assemblies, ensuring high precision in rotation and positioning of the turntable. The encoder mover is mounted on the motor's output shaft and rotates with it, while the encoder stator is mounted on a corresponding housing, ensuring accurate position feedback.

[0053] 3. High-rigidity braking system:

[0054] Manganese steel brake pads: The brake pads are made of high-rigidity manganese steel, which enhances the rigidity and durability of the braking system.

[0055] Partitioned braking structure: The brake pad assembly includes a protective pad, a brake pad, and a barrier pad. The piston rod of the brake cylinder abuts against the protective pad, avoiding direct action on the brake pad, reducing the impact on the spindle during braking, and ensuring the accuracy of the turntable.

[0056] 4. Fast response and low noise:

[0057] Direct drive motors: The A-axis and C-axis are directly driven by the first motor and the second motor respectively, which has a fast response speed, smooth operation and low noise.

[0058] Vertically positioned motor output shaft: The output shaft of the second motor is positioned perpendicular to the output shaft of the first motor, which optimizes the power transmission path and improves transmission efficiency.

[0059] 5. Multi-load bearing capacity:

[0060] High rigidity structure: The turntable can withstand radial and axial loads and overturning moments simultaneously, ensuring the stability and reliability of the machining process.

[0061] Enhanced braking system: Through the coordinated work of multiple braking components, a powerful locking torque is provided, ensuring the stability of the turntable during machining.

[0062] 6. Ease of maintenance:

[0063] Convenient brake pad replacement: The partitioned brake structure makes brake pad replacement and maintenance very convenient; simply remove the cylinder to replace the brake pads.

[0064] Easy installation and removal of the encoder: The connection design between the encoder and the spindle makes the installation and removal of the encoder easier, facilitating the maintenance or replacement of the encoder. Attached Figure Description

[0065] Figure 1 This is a perspective view of the present invention;

[0066] Figure 2 This is a cross-sectional view of the present invention;

[0067] Figure 3 This is an enlarged view of the connection between the second rocker arm and the output shaft of the first motor of this utility model;

[0068] Figure 4 This is an enlarged view of the first brake assembly of this utility model.

[0069] In the picture:

[0070] 1. A-axis; 2. C-axis; 3. First tailstock; 4. First rocker arm; 5. Second rocker arm; 6. First motor; 7. First mounting hole; 8. First bolt; 9. Second motor; 10. Base; 11. First housing; 12. First bearing; 13. First brake cylinder; 14. First brake assembly; 15. Protective plate; 16. Brake pad; 17. Barrier plate; 18. First encoder assembly; 19. Second housing; 20. Second bearing; 21. Second brake assembly; 22. Second encoder assembly; 23. First flange; 24. Tailstock spindle; 25. Third brake assembly; 26. Cable exit cover; 27. Output shaft of the second motor. Detailed Implementation

[0071] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0072] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0074] In the description of this embodiment, the terms "upper," "lower," "front," "rear," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0075] Combination Figures 1-4 As shown, this utility model provides a direct-drive cradle five-axis CNC turntable structure, including: A-axis 1, C-axis 2, and a first tailstock 3;

[0076] The C-axis 2 is provided with a first rocker arm 4 and a second rocker arm 5 on both sides respectively. The first rocker arm 4 is mounted on the first tailstock 3 and the second rocker arm 5 is mounted on the A-axis 1.

[0077] The A-axis 1 includes a first motor 6, and the output shaft of the first motor 6 is provided with a plurality of first mounting holes 7;

[0078] The second rocker arm 5 is provided with a plurality of first bolts 8, which are installed in the first mounting holes 7 for mounting the second rocker arm 5 on the output shaft of the first motor 6, so that the first motor 6 directly drives the second rocker arm 5 to rotate and thus drives the C-axis 2 to rotate.

[0079] The C-axis 2 includes a second motor 9, the output shaft of which is perpendicular to the output shaft of the first motor 6.

[0080] The A-axis 1 and the first tailstock 3 are also mounted on a base 10.

[0081] The A-axis 1 also includes a first housing 11, a first bearing 12, a first brake cylinder 13, and a first brake assembly 14;

[0082] The first motor 6 is installed in the first housing 11, and a first bearing 12 is provided between the output shaft of the first motor 6 and the first housing 11;

[0083] The first brake cylinder 13 is mounted on the first housing 11, and the first brake assembly 14 is mounted on the output shaft of the first motor 6 for braking the output shaft of the first motor 6 and rotating together with the output shaft.

[0084] The first brake assembly 14 includes a protective plate 15, a brake pad 16, and a barrier plate 17, wherein the brake pad 16 is disposed between the protective plate 15 and the barrier plate 17;

[0085] The piston rod of the first brake cylinder 13 extends out and abuts against the protective plate 15 for braking.

[0086] The A-axis 1 also includes a first encoder assembly 18, which includes a first encoder mover and a first encoder stator;

[0087] The first encoder mover is mounted on the tail end of the output shaft of the first motor 6 and rotates together with the output shaft of the first motor 6. The first encoder stator is mounted on the first housing 11.

[0088] The C-axis 2 also includes a second housing 19, a second bearing 20, a second brake cylinder, and a second brake assembly 21;

[0089] The second motor 9 is installed inside the second housing 19, and a second bearing 20 is provided between the output shaft of the second motor 9 and the second housing 19;

[0090] The second brake cylinder is mounted on the second housing 19, and the second brake assembly 21 is mounted on the output shaft of the second motor 9 for braking the output shaft of the second motor 9 and rotating together with the output shaft;

[0091] The second brake assembly 21 includes a protective plate 15, a brake pad 16, and a barrier plate 17, with the brake pad 16 disposed between the protective plate 15 and the barrier plate 17;

[0092] The piston rod of the second brake cylinder extends out and abuts against the protective plate 15 for braking.

[0093] The C-axis 2 also includes a second encoder assembly 22, which includes a second encoder mover and a second encoder stator;

[0094] The second encoder mover is mounted on the tail end of the output shaft of the second motor 9 and rotates together with the output shaft of the second motor 9. The second encoder stator is mounted on the second housing 19.

[0095] A first flange 23 is also installed at the front end of the output shaft of the second motor 9.

[0096] The first tailstock 3 is rotatably provided with a tailstock main shaft 24, and the first rocker arm 4 is mounted on the tailstock main shaft 24.

[0097] A third brake assembly 25 is also provided on the tailstock 3 at the tail of the tailstock main shaft 24 for braking the tailstock main shaft 24.

[0098] The outer side of the first housing 11 is also provided with a cable outlet cover 26 for cable routing.

[0099] The brake pad 16 is made of manganese steel.

[0100] The principle of this utility model is as follows:

[0101] 1. Structural Overview

[0102] This utility model provides a direct-drive cradle five-axis CNC turntable structure, mainly including an A-axis 1, a C-axis 2, and a first tailstock 3. A first rocker arm 4 and a second rocker arm 5 are respectively arranged on both sides of the C-axis 2. The first rocker arm 4 is mounted on the first tailstock 3, and the second rocker arm 5 is mounted on the A-axis 1. The A-axis 1 and the C-axis 2 are driven by a first motor 6 and a second motor 9, respectively, with the output shafts of the two motors vertically aligned. The A-axis 1 and the first tailstock 3 are simultaneously mounted on a base 10, forming a stable cradle suspension structure.

[0103] 2. Working principle of A-axis 1

[0104] Motor drive:

[0105] A-axis 1 includes a first motor 6, and the output shaft of the motor is provided with a plurality of first mounting holes 7.

[0106] The second rocker arm 5 is provided with a number of first bolts 8, which are installed in the first mounting holes 7 to fix the second rocker arm 5 on the output shaft of the first motor 6.

[0107] When the first motor 6 starts, its output shaft rotates, which drives the C-axis 2 to rotate through the second rocker arm 5.

[0108] Bearing support:

[0109] The first motor 6 is installed in the first housing 11, and a first bearing 12 is provided between the output shaft of the first motor 6 and the first housing 11 to ensure the smooth rotation of the output shaft.

[0110] Braking system:

[0111] A-axis 1 is equipped with a braking system, which includes a first brake cylinder 13 and a first brake assembly 14.

[0112] The first brake assembly 14 includes a protective plate 15, a brake pad 16, and a barrier plate 17, with the brake pad 16 disposed between the protective plate 15 and the barrier plate 17.

[0113] When braking is required, the piston rod of the first brake cylinder 13 extends and abuts against the protective plate 15, applying pressure to the brake pad 16 through the protective plate 15, thereby braking the output shaft of the first motor 6.

[0114] Encoder components:

[0115] A-axis 1 also includes a first encoder assembly 18, which includes a first encoder mover and a first encoder stator.

[0116] The first encoder mover is installed at the tail end of the output shaft of the first motor 6 and rotates together with the output shaft.

[0117] The first encoder stator is mounted on the first housing 11 and is used to detect and feedback the rotational position of the output shaft.

[0118] 3. Working principle of C-axis 2

[0119] Motor drive:

[0120] C-axis 2 includes a second motor 9, the output shaft of which is set perpendicular to the output shaft of the first motor 6.

[0121] A first flange 23 is installed at the front end of the output shaft of the second motor 9 for connecting workpieces or tools.

[0122] Bearing support:

[0123] The second motor 9 is installed inside the second housing 19. A second bearing 20 is provided between the output shaft of the second motor 9 and the second housing 19 to ensure the smooth rotation of the output shaft.

[0124] Braking system:

[0125] C-axis 2 is equipped with a braking system, which includes a second brake cylinder and a second brake assembly 21.

[0126] The second brake assembly 21 includes a protective plate 15, a brake pad 16, and a barrier plate 17, with the brake pad 16 disposed between the protective plate 15 and the barrier plate 17.

[0127] When braking is required, the piston rod of the second brake cylinder extends and abuts against the protective plate 15, applying pressure to the brake pad 16 through the protective plate 15 to achieve braking of the output shaft of the second motor 9.

[0128] Encoder components:

[0129] C-axis 2 also includes a second encoder assembly 22, which includes a second encoder mover and a second encoder stator.

[0130] The second encoder mover is installed at the tail end of the output shaft of the second motor 9 and rotates with the output shaft.

[0131] The second encoder stator is mounted on the second housing 19 and is used to detect and provide feedback on the rotational position of the output shaft.

[0132] 4. Working principle of tailstock spindle 24

[0133] Rotation and braking:

[0134] A tailstock main shaft 24 is rotatably mounted on the first tailstock 3, and a first rocker arm 4 is mounted on the tailstock main shaft 24.

[0135] A third brake assembly 25 is also provided on the first tailstock 3 at the tail of the tailstock main shaft 24 for braking the tailstock main shaft 24.

[0136] When braking is required, the cylinder piston rod of the third brake assembly 25 extends to brake the tailstock main shaft 24.

[0137] 5. Overall Workflow

[0138] start up:

[0139] The control system issues a command, and the first motor 6 and the second motor 9 start.

[0140] The output shaft of the first motor 6 rotates, which in turn drives the C-axis 2 to rotate via the second rocker arm 5.

[0141] The output shaft of the second motor 9 rotates, causing the workpiece or tool to rotate.

[0142] Location feedback:

[0143] The first encoder mover and the second encoder mover rotate with the output shafts of the first motor 6 and the second motor 9, respectively.

[0144] The encoder stator detects the rotational position of the output shaft and feeds the signal back to the control system to ensure precise control.

[0145] brake:

[0146] When it is necessary to stop the rotation, the control system issues a braking command.

[0147] The piston rods of the first brake cylinder 13, the second brake cylinder, and the third brake assembly 25 extend to brake the output shaft of the first motor 6, the output shaft of the second motor 9, and the tailstock main shaft 24, respectively.

[0148] Maintenance and repair:

[0149] Cables are routed out through cable tray 26 to ensure safe and tidy electrical connections.

[0150] The replacement and maintenance of brake pad 16 is very convenient; simply remove the cylinder to replace brake pad 16.

[0151] Summarize

[0152] This invention, through the integrated design of a direct-drive motor, high-precision bearings, a disconnected braking system, and an encoder assembly, achieves advantages such as simple structure, convenient installation, small size, high precision, a high-rigidity braking system, fast response, and low noise, significantly improving the performance and reliability of the turntable. This design not only improves machining accuracy and efficiency but also reduces maintenance costs and expands its application range, possessing high practical value and market potential.

[0153] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent structural transformations made under the present utility model concept and based on the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the protection scope of the present utility model.

Claims

1. A direct-drive cradle five-axis CNC rotary table structure, characterized in that, include: A-axis, C-axis, first tailstock; A first rocker arm and a second rocker arm are respectively provided on both sides of the C-axis. The first rocker arm is mounted on the first tailstock and the second rocker arm is mounted on the A-axis. The A-axis includes a first motor, and the output shaft of the first motor is provided with a plurality of first mounting holes; The second rocker arm is provided with a plurality of first bolts, which are installed in the first mounting holes for mounting the second rocker arm on the output shaft of the first motor, so that the first motor can directly drive the second rocker arm to rotate and thus drive the C-axis to rotate. The C-axis includes a second motor, the output shaft of which is arranged perpendicular to the output shaft of the first motor.

2. The direct-drive cradle five-axis CNC rotary table structure according to claim 1, characterized in that, The A-axis and the first tailstock are also mounted on a base.

3. The direct-drive cradle five-axis CNC rotary table structure according to claim 1, characterized in that, The A-axis also includes a first housing, a first bearing, a first brake cylinder, and a first brake assembly; The first motor is installed in the first housing, and a first bearing is provided between the output shaft of the first motor and the first housing. The first brake cylinder is mounted on the first housing, and the first brake assembly is mounted on the output shaft of the first motor for braking the output shaft of the first motor and rotating together with the output shaft; The first brake assembly includes a protective pad, a brake pad, and a barrier pad, wherein the brake pad is disposed between the protective pad and the barrier pad; The piston rod of the first brake cylinder extends out and abuts against the protective plate to perform braking.

4. The direct-drive cradle five-axis CNC rotary table structure according to claim 3, characterized in that, The A-axis also includes a first encoder assembly, which includes a first encoder mover and a first encoder stator; The first encoder mover is mounted on the tail end of the output shaft of the first motor and rotates together with the output shaft of the first motor. The first encoder stator is mounted on the first housing.

5. The direct-drive cradle five-axis CNC rotary table structure according to claim 1, characterized in that, The C-axis also includes a second housing, a second bearing, a second brake cylinder, and a second brake assembly; The second motor is installed inside the second housing, and a second bearing is provided between the output shaft of the second motor and the second housing; The second brake cylinder is mounted on the second housing, and the second brake assembly is mounted on the output shaft of the second motor for braking the output shaft of the second motor and rotating together with the output shaft; The second brake assembly includes a protective pad, a brake pad, and a barrier pad, with the brake pad positioned between the protective pad and the barrier pad; The piston rod of the second brake cylinder extends out and abuts against the protective plate to perform braking.

6. The direct-drive cradle five-axis CNC rotary table structure according to claim 5, characterized in that, The C-axis also includes a second encoder assembly, which includes a second encoder mover and a second encoder stator; The second encoder mover is mounted on the tail end of the output shaft of the second motor and rotates together with the output shaft of the second motor. The second encoder stator is mounted on the second housing.

7. The direct-drive cradle five-axis CNC rotary table structure according to claim 5, characterized in that, A first flange is also installed at the front end of the output shaft of the second motor.

8. The direct-drive cradle five-axis CNC rotary table structure according to claim 1, characterized in that, The first tailstock is rotatably provided with a tailstock main shaft, and the first rocker arm is mounted on the tailstock main shaft; A third brake assembly is also provided on the first tailstock at the tail of the tailstock main shaft for braking the tailstock main shaft.

9. The direct-drive cradle five-axis CNC rotary table structure according to claim 3, characterized in that, The outer side of the first housing is also provided with a cable outlet cover for cable routing.

10. The direct-drive cradle five-axis CNC rotary table structure according to claim 3, characterized in that, The brake pads are made of manganese steel.

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