CN204449914U - A kind of large main arbor direct-drive type rotary table structure - Google Patents

Abstract

The utility model discloses a kind of large main arbor direct-drive type rotary table structure, torque motor stator puts together on table base, and torque motor rotor puts together on connector, and connector and workbench are closing.Connector is seated on table base by thrust ball bearing A, and connector endoporus and Biserial cylindrical roller bearing outer shroud are connected, and Biserial cylindrical roller bearing is arranged on main shaft, and main shaft is connected with table base centre bore also closing.The briquetting put together on main shaft is connected with connector by thrust ball bearing B.The stator of encoder is fixed on ring flange C, and ring flange C is fixed on main shaft, and the rotor of encoder is fixing on the table by ring flange A, ring flange B.Workbench centre bore is connected with desktop, and desktop puts together on ring flange B.Directly drive rotary table to rotate with torque motor, there is compact conformation, noise is little, precision is high, reliability high, the automatization level of the advanced lathe of China can be increased substantially.

Description

A large-scale spindle direct-drive rotary table structure

technical field

The utility model relates to a machine tool rotary table structure, in particular to a large-scale spindle direct-drive type rotary table structure, which belongs to the technical field of large-scale machine tool processing equipment.

Background technique

With the development of the manufacturing industry, CNC machine tools are developing towards high speed, high precision, flexibility and high reliability. As the main functional part of the CNC machine tool, the rotary table's functions and parameters directly affect the processing capability and precision of the machine tool. At present, the rotary table adopts mechanical transmission, and the processing and manufacturing of the headstock box and the internal gear of the headstock have strict requirements, so the processing technology is relatively complicated, and due to the existence of the mechanical transmission chain, the turntable can complete the start-up, acceleration, During reversing and parking movements, the deformation of the mechanical structure is prone to occur, and there is friction and backlash between the transmission pairs, resulting in mechanical vibration and noise during the working process of the rotary table, which in turn affects the dynamic stiffness of the rotary table and cannot Meet the high-precision requirements in the working process of the rotary table.

Contents of the invention

In order to solve the above problems, the purpose of this utility model is to provide a large-scale main shaft direct-drive rotary table structure, which cancels the traditional mechanical gear transmission, and uses a torque motor to directly drive the rotary table to rotate. The stator and rotor of the torque motor Put them on the base of the workbench and the workbench respectively, and rely on the encoder to complete the closed-loop servo feed system of the rotary worktable, that is, the indexing and positioning of the rotary worktable. It can quickly achieve continuous indexing of angles and has the characteristics of high transmission efficiency, low noise, compact structure, high precision, high reliability, and convenient maintenance.

The technical solution adopted by the utility model to solve its technical problems is: a large-scale spindle direct-drive rotary workbench structure, which is composed of a workbench, a workbench base, a torque motor stator, a torque motor rotor, a connecting body, and a thrust ball bearing A , Thrust ball bearing B, double row cylindrical roller bearing, table cover, flange A, encoder, flange B, flange C, pressure block, and main shaft. The stator of the torque motor is fitted on the base of the workbench, the rotor of the torque motor is fitted on the connection body, and the connection body is connected to the workbench. The connecting body is located on the base of the workbench through the thrust ball bearing A. The hole in the connecting body is connected with the outer ring of the double-row cylindrical roller bearing. The double-row cylindrical roller bearing is installed on the main shaft. combine. Connect the pressing block on the main shaft with the connecting body through the thrust ball bearing B. The stator of the encoder is fixed on the flange C, the flange C is fixed on the main shaft, and the rotor of the encoder is fixed on the worktable through the flange A and the flange B. A workbench cover is connected to the center hole of the workbench, and the workbench cover is fitted on the flange B.

Structural design principle: the traditional mechanical gear transmission is canceled, and the torque motor is used to directly drive the rotary table to rotate. The stator and rotor of the torque motor are respectively combined on the base of the table and the table, and the closed-loop servo drive of the rotary table is completed by the encoder. The system can quickly realize the continuous indexing of the angle and has the characteristics of high transmission efficiency, low noise, compact structure, high precision, high reliability, and convenient maintenance.

The beneficial effect of the utility model is: the main shaft direct drive rotary table structure cancels the traditional mechanical gear transmission, and the torque motor directly drives the rotary table to rotate, so that it can quickly realize the continuous indexing of the angle and has high transmission efficiency, Low noise, compact structure, high precision, high reliability, easy maintenance and so on. The invention can meet the development trend of the current numerical control machine tool towards high speed, high precision, flexibility and high reliability. It can greatly improve the automation level of my country's advanced machine tools and drive the development of the entire machine tool manufacturing industry. This utility model is a project of Heilongjiang Outstanding Youth Fund, and the contract number is: JC201318.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural schematic diagram of a large-scale spindle direct-drive rotary table structure according to the present invention.

reference sign

1. Workbench 2. Workbench base 3. Torque motor stator 4. Torque motor rotor

5. Connecting body 6. Thrust ball bearing A 7. Thrust ball bearing B 8. Double row cylindrical roller bearing

9. Workbench cover 10. Flange A 11. Encoder 12. Flange B

13. Flange C 14. Briquetting block 15. Main shaft.

Detailed ways

Please refer to Figure 1, a structure of a large-scale spindle direct-drive rotary table, which consists of a table, a table base, a torque motor stator, a torque motor rotor, a connecting body, a thrust ball bearing A, a thrust ball bearing B, and a double-row column Roller bearing, table cover, flange A, encoder, flange B, flange C, pressure block, and main shaft. The torque motor stator 3 is closed on the workbench base 2, the torque motor rotor 4 is closed on the connection body 5, the connection body 5 is connected with the workbench 1, and the torque motor directly drives the rotary worktable 1 to rotate. The connecting body 5 is located on the workbench base 2 through the thrust ball bearing A 6, the inner hole of the connecting body 5 is connected with the outer ring of the double-row cylindrical roller bearing 8, and the double-row cylindrical roller bearing 8 is installed on the main shaft 15, and the main shaft 15 It is connected with the center hole of the workbench base 2 and combined, and the connecting body 5 realizes radial positioning with the workbench base 2 through the double-row cylindrical roller bearing 8 and the main shaft 15 . The briquetting block 14 on the main shaft 15 is connected with the connecting body 5 through the thrust ball bearing B 7, the briquetting block 14 can provide a downward force for the thrust ball bearing B 7, and the pressure acts on the thrust ball bearing A 6 through the connecting body 5, In this way, the preload of the thrust ball bearing A6 is realized, that is, the axial positioning of the connecting body 5 and the workbench base 2 is realized. The stator of the encoder 11 is fixed on the flange C 13, the flange C 13 is fixed on the main shaft 15, the rotor of the encoder 11 is fixed on the workbench 1 through the flange A 10 and the flange B 12, and the working When the table 1 rotates relative to the table base 2, the encoder 11 can convert the angular displacement into an electrical signal and feed it back to the torque motor to complete the closed-loop servo feed system of the rotary table. Workbench 1 center hole is connected with workbench cover plate 9, and workbench cover plate 9 is combined on the flange B12.

Claims (1)

1. a large main arbor direct-drive type rotary table structure, be made up of workbench, table base, torque motor stator, torque motor rotor, connector, thrust ball bearing A, thrust ball bearing B, Biserial cylindrical roller bearing, desktop, ring flange A, encoder, ring flange B, ring flange C, briquetting, main shaft, it is characterized in that: torque motor stator (3) puts together on table base (2), torque motor rotor (4) puts together on connector (5), and connector (5) and workbench (1) are conjunction; Connector (5) is by thrust ball bearing A(6) be seated on table base (2), connector (5) endoporus and Biserial cylindrical roller bearing (8) outer shroud are connected, Biserial cylindrical roller bearing (8) is arranged on main shaft (15), and main shaft (15) is connected also closing with table base (2) centre bore; Put together on briquetting (14) on main shaft (15) by thrust ball bearing B(7) be connected with connector (5); The stator of encoder (11) is fixed on ring flange C(13) on, ring flange C(13) be fixed on main shaft (15), the rotor of encoder (11) is by ring flange A(10), ring flange B(12) be fixed on workbench (1); Workbench (1) centre bore is connected with desktop (9), desktop (9) puts together on ring flange B(12) on.