Third harmonic CNC rotary table

Abstract

The invention discloses a third harmonic numerical control turntable, comprising: a protective mounting part, which comprises a housing; a reduction output part, which comprises a working output part and a reducer, the working output part is arranged on the housing, and the reducer is arranged on the working output part; the working output part comprises an output shaft, and the output shaft is arranged on the housing; the reducer comprises a third harmonic reducer; the third harmonic reducer is arranged on the housing; a torque motor part, which comprises a high-speed shaft, which is arranged on the housing, and the high-speed shaft is connected to the reducer; a monitoring brake part, which is arranged on the housing, and the monitoring brake part comprises an encoder and a brake, the encoder is arranged on the torque motor part, and the brake is arranged on the encoder. The invention has a simple structure, a reasonable structural design, high overall rigidity, high output accuracy, long accuracy retention life, high transmission efficiency, small size and light weight, high dust and water resistance level, and can adapt to various harsh processing environments.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled machine tools, and more specifically, to a third harmonic numerically controlled rotary table. Background Art

[0002] CNC rotary table is an important machine tool accessory, mainly used in machining centers and CNC boring and milling machines, etc., to expand the processing capacity from 3 axes to 4 axes or 5 axes, so as to realize the processing of more complex and precise parts. Conventional CNC rotary tables generally use worm gear or roller cam transmission structure to realize the rotary motion of the rotary table. Due to the transmission principle and manufacturing material limitations of the worm gear itself, the worm or worm-like parts will wear during use, which will increase the gap between the worm and the turbine, resulting in a decrease in accuracy and load-bearing capacity. Regular maintenance is required, and external braking equipment is required during the processing process. The transmission efficiency is low, the volume is large, and it takes up space. The cam and follower of the roller cam rotary table are in line contact, so the contact stress is large, the wear is fast, and it is not suitable to transmit too much power. In addition, there are direct-drive DD motor CNC rotary tables, but they have poor rigidity, large volume, high cost, high heat generation, and are not easy to repair.

[0003] Therefore, it is of great practical significance to design a third harmonic CNC turntable with simple structure, reasonable structural design, high overall rigidity, high output accuracy, long accuracy retention life, high transmission efficiency, small size, light weight and maintenance-free. Summary of the invention

[0004] In order to overcome the above defects, the present invention provides a third harmonic CNC turntable, which specifically adopts the following technical solutions:

[0005] A third harmonic numerically controlled turntable, comprising:

[0006] A protective mounting member, comprising a housing;

[0007] A reduction output member, which is arranged on the housing, the reduction output member includes a working output member and a reducer, the working output member is arranged on the housing, and the reducer is arranged on the working output member; the working output member includes an output shaft, and the output shaft is arranged on the housing; the reducer includes a third harmonic reducer; the third harmonic reducer is arranged on the housing;

[0008] A torque motor component, which is arranged on the housing, and the torque motor component includes a high-speed shaft, the high-speed shaft is arranged on the housing, and the high-speed shaft is connected to the reducer;

[0009] A monitoring brake component, which is arranged on the housing, and comprises an encoder and a brake, wherein the encoder is arranged on the torque motor component, and the brake is arranged on the encoder;

[0010] Wherein: the torque motor inputs a high speed to the third harmonic reducer through the high-speed shaft, and the speed after being reduced by the third harmonic reducer is output through the output shaft; the encoder monitors and controls the rotation speed of the high-speed shaft and the output shaft in real time.

[0011] Preferably, the shell comprises an outer shell, a front end cover and a rear end cover, and the front end cover and the rear end cover are both arranged on the outer shell; a lifting ring and a turntable mounting seat are arranged on the side wall of the outer shell; the front end cover is generally in the shape of a reducing tube, and the large end of the front end cover is arranged on one end face of the outer shell, and a first sealing ring is arranged on the mating surface between the front end cover and the outer shell; a joint through hole and a limiting through hole are arranged on the rear end cover, and there are a plurality of joint through holes, and waterproof joints are respectively arranged in the plurality of joint through holes, and power supply lines and signal transmission lines are respectively arranged in the waterproof joints, and the limiting through hole is located at the center of the rear end cover, and the rear end cover is arranged on the other end face of the outer shell, and a second sealing ring is arranged on the mating surface between the rear end cover and the outer shell.

[0012] Preferably, the reduction output member includes a working output member and a reducer, the working output member is arranged on the front end cover, and the reducer is arranged on the working output member; the working output member also includes a first high-load deep groove ball bearing, a first oil seal, a labyrinth water seal and a working disk, the first high-load deep groove ball bearing is arranged on the front end cover, the output shaft is arranged on the first high-load deep groove ball bearing, and the first oil seal, the labyrinth water seal and the working disk are all arranged on the output shaft;

[0013] The first high-load deep groove ball bearing is embedded in the small head of the front end cover, one end of the output shaft is embedded in the first high-load deep groove ball bearing, the first oil seal is mounted on the output shaft, the other end of the output shaft is mounted with a waterproof bearing and a hole retaining ring, and the waterproof bearing is embedded in the limiting through hole, and the hole retaining ring is used to limit the axial displacement of the output shaft.

[0014] Preferably, the labyrinth water seal comprises a first water seal cover, a second water seal cover and a protective cover, the first water seal cover is arranged on the front end cover, and a third sealing ring is arranged on the mating surface between the first water seal cover and the front end cover; the second water seal cover is sleeved on the output shaft, and a plurality of fourth sealing rings are arranged on the mating surface between the second water seal cover and the output shaft; labyrinth water seal grooves are arranged on the mating surfaces of the first water seal cover and the second water seal cover, so that the mating surfaces of the first water seal cover and the second water seal cover have a dynamic waterproof sealing function; a drain hole is arranged on the protective cover, the protective cover is arranged on the first water seal cover, and the working disk is arranged on one end face of the output shaft.

[0015] Preferably, the third harmonic reducer comprises a steel wheel, a flexible wheel and a third harmonic generator, the steel wheel is arranged on the working output member, the flexible wheel is arranged on the steel wheel, and the third harmonic generator is arranged on the flexible wheel; one end face of the steel wheel is arranged on the output shaft, and a fifth sealing ring is arranged on the mating surface between the steel wheel and the output shaft; the third harmonic generator is embedded with a first bearing, and the first bearing is sleeved on the output shaft.

[0016] Preferably, the reducer also includes a crossed roller bearing, which is arranged on the third harmonic reducer; the outer ring of the crossed roller bearing is connected to the flexible wheel and is integrally arranged on the torque motor component, and a sixth sealing ring is arranged on the mating surface between the flexible wheel and the torque motor component; a second oil seal is arranged at the outer ring of the crossed roller bearing and the inner ring of the crossed roller bearing, and the inner ring of the crossed roller bearing forms a rotating pair with the outer ring of the crossed roller bearing, and the seal is formed by the second oil seal; the inner ring of the crossed roller bearing is arranged on the other end surface of the steel wheel to form a follower component.

[0017] Preferably, the torque motor component also includes a motor housing, a motor stator assembly, a motor rear end cover, a second bearing, a third bearing and a magnetic steel, the motor housing is arranged in the outer shell, the motor stator assembly is arranged in the motor housing, the motor rear end cover is arranged on the motor housing, the second bearing is arranged on the motor housing, the third bearing is arranged on the motor rear end cover, the high-speed shaft is arranged on the second bearing and the third bearing, and the magnetic steel is arranged on the high-speed shaft.

[0018] Preferably, the motor housing is arranged inside the outer shell, and the motor stator assembly is pressed into the inner cavity of the motor housing; the motor rear end cover is arranged on the motor housing, and a seventh sealing ring is arranged on the mating surface between the motor rear end cover and the motor housing, the second bearing is embedded in the motor housing, and a bearing end cover is arranged on the motor housing at the edge of the second bearing, the bearing end cover is used to fix the outer ring of the second bearing, and the third bearing is embedded in the motor rear end cover; the high-speed shaft is embedded in the second bearing and the third bearing, and one end of the high-speed shaft is connected to the third harmonic generator to enable motion transmission between the high-speed shaft and the third harmonic generator; a clamping groove and a shock-absorbing groove are arranged on the high-speed shaft, a retaining spring is installed in the clamping groove, and the retaining spring is used to fix the inner ring of the second bearing; the shock-absorbing groove is used to prevent over-positioning and buffer the axial and radial vibration of the high-speed shaft; the magnetic steel is arranged on the high-speed shaft.

[0019] Preferably, the encoder comprises a high-speed encoder and a low-speed encoder, the high-speed encoder is arranged on the torque motor, the brake is arranged on the high-speed encoder, and the low-speed encoder is arranged on the brake; the high-speed encoder comprises a high-speed encoder cover, a first code disc fixing piece, a first transition sleeve and a high-speed code disc, the high-speed encoder cover is arranged on the rear end cover of the motor, the first code disc fixing piece is arranged on the rear end cover of the motor, the first transition sleeve is sleeved on the high-speed shaft, and the high-speed code disc is sleeved on the first transition sleeve;

[0020] The brake is arranged on the end face of the high-speed encoder cover, and an eighth sealing ring is arranged on the mating surface between the brake and the high-speed encoder cover; the brake comprises a brake pad, and the square hole on the brake pad is sleeved on the square shaft of the high-speed shaft end; the low-speed encoder comprises a low-speed encoder cover, a second code disc fixing piece, a second transition sleeve and a low-speed code disc, the low-speed encoder cover is arranged on the brake, and a ninth sealing ring is arranged on the mating surface between the low-speed encoder cover and the brake; the second code disc fixing piece is arranged on the brake, the second transition sleeve is sleeved on the output shaft, and the low-speed code disc is sleeved on the second transition sleeve.

[0021] Preferably, the gaps between the torque motor component, the monitoring brake component and the housing are all sealed with heat-conductive and shock-absorbing materials.

[0022] The present invention has at least the following beneficial effects:

[0023] 1) The third harmonic CNC turntable of the present invention has a simple structure, reasonable structural design, high overall rigidity, high output accuracy, long precision retention life, high transmission efficiency, small size and light weight, high dust and water resistance level, and can adapt to various harsh processing environments;

[0024] 2) The third harmonic numerical control turntable of the present invention is provided with multiple sealing rings at multiple locations, and the multiple sealing rings can form a first internal dynamic waterproof seal, a second internal dynamic waterproof seal, a first external static waterproof seal, a first internal static waterproof seal and a first external dynamic labyrinth waterproof seal, which can significantly improve the dustproof and water-proof level of the third harmonic numerical control turntable to adapt to various harsh processing environments;

[0025] 3) The third harmonic CNC turntable of the present invention is provided with a reduction output member, the reduction output member includes a working output member and a reducer, the working output member includes a first high-load deep groove ball bearing and an output shaft, the output shaft is embedded in the first high-load deep groove ball bearing; the reducer includes a third harmonic reducer, the third harmonic reducer outputs through the output shaft after deceleration, and the first high-load deep groove ball bearing is matched with the high-rigidity, high-precision third harmonic reducer to make up for the current two harmonic similar structures under certain heavy cutting conditions, which leads to the vibration of the cutter, thereby improving the output accuracy, overall high rigidity and precision retention life, and reducing the rotation backlash;

[0026] 4) The third harmonic numerical control turntable of the present invention is provided with a torque motor and a third harmonic reducer. When the high-performance torque motor is matched with a third harmonic reducer with a high reduction ratio, a high cutting torque can be output at a relatively high speed, so that the heat generated by the third harmonic numerical control turntable is significantly lower than that generated by a conventional single DD motor direct drive, and only natural cooling is required. Moreover, due to the high-precision output of the third harmonic reducer itself, the encoder accuracy limitation can be further compensated compared with the conventional single DD motor direct drive turntable.

[0027] 5) The gaps between the torque motor component and the monitoring brake component and the housing in the third harmonic CNC turntable of the present invention are all potted with heat-conductive and shock-absorbing materials. The special shock-absorbing structure of the high-speed axis in the third harmonic CNC turntable and the potting heat-conductive and shock-absorbing materials can further reduce the vibration and noise during operation;

[0028] 6) The third harmonic CNC turntable of the present invention is provided with a monitoring brake component, which includes an encoder and a brake. The encoder includes a high-speed encoder and a low-speed encoder. The high-speed encoder can monitor the high-speed shaft in real time, and the low-speed encoder can monitor the output shaft in real time, so that the encoder can realize real-time closed-loop monitoring and control of the high and low shafts, further improving the output accuracy; the brake includes a brake pad, and the square hole on the brake pad is mounted on the square shaft at the high-speed shaft end and moves with it. This design can achieve ultra-high static braking torque, further improving the performance.

[0029] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a front-view stereoscopic structural diagram of the third harmonic CNC turntable of the present invention;

[0031] Figure 2 This is a rear-view stereoscopic structural diagram of the third harmonic CNC turntable of the present invention;

[0032] Figure 3 This is a schematic diagram of the three-dimensional structure of the third harmonic numerical control turntable of the present invention when viewed from above;

[0033] Figure 4 This is a front view of the third harmonic numerically controlled turntable of the present invention;

[0034] Figure 5 This is a cross-sectional view of the third harmonic CNC turntable of the present invention in the FF direction Figure 1 ;

[0035] Figure 6 This is a cross-sectional view of the third harmonic CNC turntable of the present invention in the FF direction Figure 1 A partial enlarged view of the middle reduction output component;

[0036] Figure 7 This is a cross-sectional view of the third harmonic CNC turntable of the present invention in the FF direction Figure 1 A partial enlarged view of the middle reduction output component and the torque motor component;

[0037] Figure 8 The third harmonic numerical control turntable of the present invention Figure 5 A partial enlarged view of middle A;

[0038] Fig. 9 This is a cross-sectional view of the third harmonic CNC turntable of the present invention in the FF direction Figure 2 ;

[0039] Among them: 1-housing, 2-front cover, 3-rear cover, 4-lifting ring, 5-turntable mounting seat, 6-first O-ring, 7-waterproof joint, 8-second O-ring, 9-first high-load deep groove ball bearing, 10-output shaft, 11-first oil seal, 12-working disk, 13-waterproof bearing, 14-hole retaining ring, 15-first water seal cover, 16-second water seal cover, 17-protective cover, 18-third O-ring, 19-fourth O-ring, 20-drain hole, 21-cross roller bearing, 22-steel wheel, 23-flexible wheel, 24-third harmonic generator, 25-fifth O-ring Ring, 26-first bearing, 27-sixth O-ring, 28-motor housing, 29-motor stator assembly, 30-motor rear end cover, 31-second bearing, 32-third bearing, 33-high-speed shaft, 34-magnetic steel, 35-seventh O-ring, 38-high-speed encoder cover, 39-first code disc fixing piece, 40-first transition sleeve, 41-high-speed code disc, 42-eighth O-ring, 44-second code disc fixing piece, 45-second transition sleeve, 46-low-speed code disc, 47-ninth O-ring, 48-thermal conductive shock absorbing material, 49-second oil seal, 50-brake pad, 51-brake. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described in detail below by way of embodiments with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0041] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0042] according to Figure 1-Figure 9 As shown, a third harmonic CNC turntable includes a protective mounting component, a speed reduction output component, a torque motor component and a monitoring brake component, wherein the speed reduction output component, the torque motor component and the monitoring brake component are all arranged on the protective mounting component.

[0043] The protective mounting member includes a housing 1, a front cover 2 and a rear cover 3, and the front cover 2 and the rear cover 3 are both arranged on the housing 1. The housing 1 is barrel-shaped, and a lifting ring 4 and a turntable mounting seat 5 are arranged on the side wall of the housing 1. The lifting ring 4 is used for lifting and installing the third harmonic numerical control turntable, and the turntable mounting seat 5 is provided with a mounting bolt, and the mounting bolt can firmly mount the third harmonic numerical control turntable on the machine tool. The front cover 2 is generally in the shape of a reducing tube, and the large head of the front cover 2 is fastened to one end face of the housing 1 by a first screw, and the front cover 2 and the housing 1 are provided with a first O-ring 6 on the mating surface, and the first O-ring 6 can prevent water and dust outside the housing 1 from entering the protective mounting member. The rear cover 3 is generally in the shape of a disc, and a joint through hole and a limit through hole are arranged on the rear cover 3. There are two joint through holes, and waterproof joints 7 are respectively arranged in the two joint through holes, and the power supply line and the signal transmission line are respectively arranged in the waterproof joint 7. The limiting through hole is located at the center of the rear end cover 3, and the rear end cover 3 is fastened to the other end face of the outer shell 1 by a second screw, and a second O-ring 8 is provided on the mating surface between the rear end cover 3 and the outer shell 1. The second O-ring 8 can prevent water and dust outside the outer shell 1 from penetrating into the protective mounting component.

[0044] The deceleration output member includes a working output member and a reducer, wherein the working output member is arranged on the front end cover 2, and the reducer is arranged on the working output member. The working output member includes a first high-load deep groove ball bearing 9, an output shaft 10, a first oil seal 11, a labyrinth water seal and a working disk 12, wherein the first high-load deep groove ball bearing 9 is arranged on the front end cover 2, the output shaft 10 is arranged on the first high-load deep groove ball bearing 9, and the first oil seal 11, the labyrinth water seal and the working disk 12 are all arranged on the output shaft 10.

[0045] The first high-load deep groove ball bearing 9 is embedded in the small head of the front end cover 2, and the first high-load deep groove ball bearing 9 can form a first internal dynamic waterproof seal. One end of the output shaft 10 is embedded in the first high-load deep groove ball bearing 9, and the first oil seal 11 is sleeved on the output shaft 10, and the outer side of the first oil seal 11 is tightly fitted with the inner side of the front end cover 2, and the first oil seal 11 can form a second internal dynamic waterproof seal. The other end of the output shaft 10 is sleeved with a waterproof bearing 13 and a hole retaining ring 14, and the waterproof bearing 13 is embedded in the limiting through hole, and the hole retaining ring 14 is used to limit the axial displacement of the output shaft 10.

[0046] The labyrinth water seal comprises a first water seal cover 15, a second water seal cover 16 and a protective cover 17. The first water seal cover 15 is fastened to the front end cover 2 by a third screw, and a third O-ring 18 is provided on the mating surface between the first water seal cover 15 and the front end cover 2, and the third O-ring 18 can form a first external static waterproof seal. The second water seal cover 16 is sleeved on the output shaft 10, and two fourth O-rings 19 are provided on the mating surface between the second water seal cover 16 and the output shaft 10, and the two fourth O-rings 19 can form a first internal static waterproof seal. The mating surfaces of the first water seal cover 15 and the second water seal cover 16 are both provided with labyrinth water seal grooves, so that the mating surfaces of the first water seal cover 15 and the second water seal cover 16 have a dynamic waterproof sealing effect, thereby forming a first external dynamic labyrinth waterproof seal. A drain hole 20 is provided on the protective cover 17 near the second water seal cover 16, and the drain hole 20 is used to discharge water in the labyrinth water seal. The protection cover 17 is fastened to the first water seal cover 15 by a fourth screw, and there is a small gap between the protection cover 17 and the first water seal cover 15 to improve the waterproof sealing performance of the labyrinth water seal. The working disk 12 is fastened to one end face of the output shaft 10 by a fifth screw.

[0047] The reducer includes a third harmonic reducer and a cross roller bearing 21, wherein the third harmonic reducer is arranged on the working output member, and the cross roller bearing 21 is arranged on the third harmonic reducer. The third harmonic reducer includes a steel wheel 22, a flexible wheel 23 and a third harmonic generator 24, wherein the steel wheel 22 is arranged on the working output member, the flexible wheel 23 is arranged on the steel wheel 22, and the third harmonic generator 24 is arranged on the flexible wheel 23. One end face of the steel wheel 22 is fastened to the output shaft 10 by a sixth screw, and a fifth O-ring 25 is arranged on the mating surface between the steel wheel 22 and the output shaft 10. The third harmonic generator 24 is embedded with a first bearing 26, and the first bearing 26 is sleeved on the output shaft 10, so that the third harmonic generator 24 is in rolling contact with the output shaft 10 through the first bearing 26, thereby limiting their positions.

[0048] The outer ring of the cross roller bearing 21 is connected with the flexible wheel 23 by the seventh screw and fixed as a whole on the torque motor component, and the sixth O-ring 27 is provided on the mating surface between the flexible wheel 23 and the torque motor component. The outer ring of the cross roller bearing 21 and the inner ring of the cross roller bearing 21 are provided with a second oil seal 49, and the inner ring of the cross roller bearing 21 forms a rotating pair with the outer ring of the cross roller bearing 21, and the second oil seal 49 forms a seal. The inner ring of the cross roller bearing 21 is fastened to the other end surface of the steel wheel 22 by the eighth screw to form a follower assembly.

[0049] After the third harmonic generator 24 is installed in the inner cavity of the flexible wheel 23, it forces the flexible wheel 23 to produce elastic deformation and present three convexities, thereby generating a third frequency, so that the outer teeth on the long axis of the third harmonic generator 24 on the flexible wheel 23 are inserted into the inner tooth groove of the rigid wheel to form a fully meshed state, while the two wheel teeth on the short axis of the third harmonic generator 24 on the flexible wheel 23 are completely non-contacting and are in a disengaged state. During the continuous rotation of the third harmonic generator 24, due to the continuous meshing movement of the contacting gears, three staggered tooth movements are generated, thereby forming a certain reduction output to the outside, and the first bearing 26 supports the outer ring of the third harmonic generator 24 and the outer ring of the output shaft 10. The third harmonic reducer improves the structure of the wave generator, so that the elastic deformation on the flexible wheel 23 is presented with three convexities, thereby generating simultaneous meshing of three positions. Since the meshing contact surface between teeth and tooth surfaces is larger during the transmission process, and the number of meshing teeth is greater than that of the traditional ones, the load per unit area is smaller, and the bearing capacity and rigidity are higher than those of the traditional second harmonic reducer. Therefore, the transmission of the third harmonic reducer is smoother, the operation is more stable, the precision is higher, the rigidity shown to the outside is better, and the backlash is smaller, which is particularly suitable for the requirements of CNC turntables for high rigidity at the output end.

[0050] The torque motor component includes a motor housing 28, a motor stator assembly 29, a motor rear end cover 30, a second bearing 31, a third bearing 32, a high-speed shaft 33 and a magnetic steel 34. The motor housing 28 is arranged in the housing 1, the motor stator assembly 29 is arranged in the motor housing 28, the motor rear end cover 30 is arranged on the motor housing 28, the second bearing 31 is arranged on the motor housing 28, and the third bearing 32 is arranged on the motor rear end cover 30. The high-speed shaft 33 is arranged on the second bearing 31 and the third bearing 32, and the magnetic steel 34 is arranged on the high-speed shaft 33.

[0051] The motor housing 28 is fastened to the inside of the housing 1 by the ninth screw, and the motor stator assembly 29 is pressed into the inner cavity of the motor housing 28. The motor rear end cover 30 is fastened to the motor housing 28 by the tenth screw, and a seventh O-ring 35 is arranged on the mating surface of the motor rear end cover 30 and the motor housing 28. The second bearing 31 is embedded in the motor housing 28, and a bearing end cover is arranged on the motor housing 28 at the edge of the second bearing 31, and the bearing end cover is used to fix the outer ring of the second bearing 31. The third bearing 32 is embedded in the motor rear end cover 30. The high-speed shaft 33 is embedded in the second bearing 31 and the third bearing 32, and one end of the high-speed shaft 33 is connected to the third harmonic generator 24 by the eleventh screw, so that the high-speed shaft 33 and the third harmonic generator 24 can transfer motion. The high-speed shaft 33 is provided with a clamping groove and a damping groove, and a clamping spring is set in the clamping groove, and the clamping spring is used to fix the inner ring of the second bearing 31. The damping groove is used to prevent over-positioning and buffer the axial and radial vibration of the high-speed shaft 33. The magnetic steel 34 is bonded to the surface of the shaft section of the high-speed shaft 33 by glue. With the cooperation of the ultra-flat, high-torque and low-cogging torque torque motor and the high-speed shaft 33 with a special damping structure, the whole shows excellent dynamic response performance, extremely low vibration noise and high rigidity retention performance during processing, which is particularly suitable for the power source requirements of CNC turntables for high torque and high stable output.

[0052] The monitoring brake component includes an encoder and a brake 51, wherein the encoder is arranged on the torque motor component, and the brake 51 is arranged on the encoder. The encoder includes a high-speed encoder and a low-speed encoder, wherein the high-speed encoder is arranged on the torque motor component, the brake 51 is arranged on the high-speed encoder, and the low-speed encoder is arranged on the brake 51. The high-speed encoder includes a high-speed encoder cover 38, a first code disc fixing component 39, a first transition sleeve 40 and a high-speed code disc 41, wherein the high-speed encoder cover 38 is fastened to the rear end cover 30 of the motor by the twelfth screw, the first code disc fixing component 39 is fastened to the rear end cover 30 of the motor by the thirteenth screw, the first transition sleeve 40 is sleeved on the high-speed shaft 33, and the high-speed code disc 41 is sleeved on the first transition sleeve 40 to record the speed information of the high-speed shaft 33.

[0053] The brake 51 is arranged on the end face of the high-speed encoder cover 38 by the fourteenth screw, and the eighth O-ring 42 is arranged on the matching surface of the brake 51 and the high-speed encoder cover 38. The brake 51 includes a brake pad 50, and the square hole on the brake pad 50 is sleeved on the square shaft at the end of the high-speed shaft 33. The low-speed encoder includes a low-speed encoder cover, a second code disk fixing member 44, a second transition sleeve 45 and a low-speed code disk 46. The low-speed encoder cover is fastened to the brake 51 by the fifteenth screw, and the ninth O-ring 47 is arranged on the matching surface of the low-speed encoder cover and the brake 51. The second code disk fixing member 44 is fastened to the brake 51 by the sixteenth screw, the second transition sleeve 45 is sleeved on the output shaft 10, and the low-speed code disk 46 is sleeved on the second transition sleeve 45 to record the speed information of the output shaft 10. Specifically, the brake 51 is an electromagnetic power-off brake 51.

[0054] The monitoring brake uses a compatible high-speed and low-speed dual encoder configuration to record the real-time speed information of the high-speed shaft 33 and the output shaft 10, and regulates the speed of the high-speed shaft 33 in real time through the speed information of the low-speed shaft, forming a real-time monitoring and regulation closed loop. This further improves the control accuracy and provides real-time compensation for certain special heavy-cutting conditions of the CNC turntable. At the same time, the high-speed shaft 33 is matched with an electromagnetic power-off brake 51, and the braking and release time is much lower than that of traditional oil brakes and air brakes, which is particularly suitable for high-speed return to zero or reversing conditions of the turntable, greatly improving the processing efficiency.

[0055] The gaps between the torque motor component and the monitoring brake component and the housing 1 are all filled with heat-conductive and shock-absorbing materials 48, so as to further optimize the anti-seismic performance and thermal conductivity of the third harmonic CNC turntable.

[0056] The beneficial effects of the present invention are as follows:

[0057] The third harmonic numerical control turntable of the present invention has a simple structure, a reasonable structural design, high overall rigidity, high output accuracy, long accuracy retention life, high transmission efficiency, small size and light weight, high dust and water resistance level, and can adapt to various harsh processing environments. The third harmonic numerical control turntable of the present invention is provided with multiple sealing rings at multiple locations, and the multiple sealing rings can form a first internal dynamic waterproof seal, a second internal dynamic waterproof seal, a first external static waterproof seal, a first internal static waterproof seal, and a first external dynamic labyrinth waterproof seal, which can significantly improve the dust and water resistance level of the third harmonic numerical control turntable to adapt to various harsh processing environments.

[0058] The third harmonic CNC turntable of the present invention is provided with a reduction output member, which includes a working output member and a reducer, and the working output member includes a first high-load deep groove ball bearing 9 and an output shaft 10, and the output shaft 10 is embedded in the first high-load deep groove ball bearing 9; the reducer includes a third harmonic reducer, and the third harmonic reducer outputs through the output shaft 10 after deceleration. Through the cooperation of the first high-load deep groove ball bearing 9 and the high-rigidity, high-precision third harmonic reducer, it is possible to make up for the situation that the current second harmonic similar structure is not sufficiently rigid in some heavy cutting situations, resulting in tool vibration, thereby improving the output accuracy, overall rigidity and precision retention life, and reducing the rotation backlash.

[0059] The third harmonic CNC turntable of the present invention is provided with a torque motor and a third harmonic reducer. When the high-performance torque motor is matched with a third harmonic reducer with a high reduction ratio, high cutting torque can be output at a relatively high speed, so that the heat generated by the third harmonic CNC turntable is significantly lower than that generated when the traditional single DD motor is directly driven, and only natural cooling is required. Moreover, due to the high-precision output of the third harmonic reducer itself, compared with the traditional single DD motor directly driven turntable, the encoder accuracy limitation can be further compensated.

[0060] The gaps between the torque motor components and the monitoring brake components and the housing 1 in the third harmonic CNC turntable of the present invention are all sealed with heat-conductive shock-absorbing materials 48. The special shock-absorbing structure of the high-speed shaft 33 in the third harmonic CNC turntable combined with the sealed heat-conductive shock-absorbing materials 48 can further reduce vibration and noise during operation.

[0061] The third harmonic CNC turntable of the present invention is provided with a monitoring brake component, which includes an encoder and a brake 51. The encoder includes a high-speed encoder and a low-speed encoder. The high-speed encoder can monitor the high-speed shaft 33 in real time, and the low-speed encoder can monitor the output shaft 10 in real time, so that the encoder can realize real-time closed-loop monitoring and control of the high and low shafts, further improving the output accuracy; the brake 51 includes a brake pad 50, and the square hole on the brake pad 50 is mounted on the square shaft at the end of the high-speed shaft 33 and moves with it. This design can achieve ultra-high static braking torque, further improving the performance.

[0062] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A third harmonic CNC turntable, characterized in that: include: A protective mounting member, comprising a housing; A reduction output member, which is arranged on the housing, the reduction output member includes a working output member and a reducer, the working output member is arranged on the housing, and the reducer is arranged on the working output member; the working output member includes an output shaft, and the output shaft is arranged on the housing; the reducer includes a third harmonic reducer; the third harmonic reducer is arranged on the housing; A torque motor component, which is arranged on the housing, and the torque motor component includes a high-speed shaft, the high-speed shaft is arranged on the housing, and the high-speed shaft is connected to the reducer; A monitoring brake component, which is arranged on the housing, and comprises an encoder and a brake, wherein the encoder is arranged on the torque motor component, and the brake is arranged on the encoder; Wherein: the torque motor inputs a high speed to the third harmonic reducer through the high-speed shaft, and the speed after being reduced by the third harmonic reducer is output through the output shaft; the encoder monitors and controls the rotation speed of the high-speed shaft and the output shaft in real time; The shell includes an outer shell, a front cover and a rear cover; the torque motor component also includes a motor housing, a motor stator assembly, a motor rear cover, a second bearing, a third bearing and a magnetic steel; the encoder includes a high-speed encoder and a low-speed encoder, the high-speed encoder is arranged on the torque motor component, the brake is arranged on the high-speed encoder, and the low-speed encoder is arranged on the brake; the high-speed encoder includes a high-speed encoder cover, a first code disc fixing part, a first transition sleeve and a high-speed code disc, the high-speed encoder cover is arranged on the motor rear cover, the first code disc fixing part is arranged on the motor rear cover, the first transition sleeve is sleeved on the high-speed shaft, and the high-speed code disc is sleeved on the first transition sleeve; the brake is arranged on the An eighth sealing ring is arranged on the end surface of the high-speed encoder cover, and on the mating surface between the brake and the high-speed encoder cover; the brake comprises a brake pad, and the square hole on the brake pad is mounted on the square shaft at the end of the high-speed shaft and moves with it; the low-speed encoder comprises a low-speed encoder cover, a second code disc fixing member, a second transition sleeve and a low-speed code disc, the low-speed encoder cover is arranged on the brake, and a ninth sealing ring is arranged on the mating surface between the low-speed encoder cover and the brake; the second code disc fixing member is arranged on the brake, the second transition sleeve is mounted on the output shaft, and the low-speed code disc is mounted on the second transition sleeve; the gaps between the torque motor component and the monitoring brake component and the outer casing are all sealed with heat-conductive and shock-absorbing materials.

2. The third harmonic numerically controlled turntable according to claim 1, characterized in that: The front end cover and the rear end cover are both arranged on the outer shell; a lifting ring and a turntable mounting seat are arranged on the side wall of the outer shell; the front end cover is generally in the shape of a reducing tube, the large end of the front end cover is arranged on one end face of the outer shell, and a first sealing ring is arranged on the mating surface of the front end cover and the outer shell; a joint through hole and a limiting through hole are arranged on the rear end cover, and there are multiple joint through holes, and waterproof joints are respectively arranged in the multiple joint through holes, and power supply lines and signal transmission lines are respectively arranged in the waterproof joints, and the limiting through hole is located at the center of the rear end cover, and the rear end cover is arranged on the other end face of the outer shell, and a second sealing ring is arranged on the mating surface of the rear end cover and the outer shell.

3. The third harmonic numerically controlled turntable according to claim 2, characterized in that: The speed reduction output member includes a working output member and a speed reducer, wherein the working output member is arranged on the front end cover, and the speed reducer is arranged on the working output member; the working output member also includes a first high-load deep groove ball bearing, a first oil seal, a labyrinth water seal and a working disk, wherein the first high-load deep groove ball bearing is arranged on the front end cover, the output shaft is arranged on the first high-load deep groove ball bearing, and the first oil seal, the labyrinth water seal and the working disk are all arranged on the output shaft; The first high-load deep groove ball bearing is embedded in the small head of the front end cover, one end of the output shaft is embedded in the first high-load deep groove ball bearing, the first oil seal is mounted on the output shaft, the other end of the output shaft is mounted with a waterproof bearing and a hole retaining ring, and the waterproof bearing is embedded in the limiting through hole, and the hole retaining ring is used to limit the axial displacement of the output shaft.

4. The third harmonic numerically controlled turntable according to claim 3, characterized in that: The labyrinth water seal comprises a first water seal cover, a second water seal cover and a protective cover, wherein the first water seal cover is arranged on the front end cover, and a third sealing ring is arranged on the mating surface between the first water seal cover and the front end cover; the second water seal cover is sleeved on the output shaft, and a plurality of fourth sealing rings are arranged on the mating surface between the second water seal cover and the output shaft; labyrinth water seal grooves are arranged on the mating surfaces of the first water seal cover and the second water seal cover, so that the mating surfaces of the first water seal cover and the second water seal cover have a dynamic waterproof sealing function; a drain hole is arranged on the protective cover, the protective cover is arranged on the first water seal cover, and the working disk is arranged on one end surface of the output shaft.

5. The third harmonic numerically controlled turntable according to any one of claims 1 to 4, characterized in that: The third harmonic reducer includes a steel wheel, a flexible wheel and a third harmonic generator, wherein the steel wheel is arranged on the working output member, the flexible wheel is arranged on the steel wheel, and the third harmonic generator is arranged on the flexible wheel; one end face of the steel wheel is arranged on the output shaft, and a fifth sealing ring is arranged on the matching surface between the steel wheel and the output shaft; the third harmonic generator is embedded with a first bearing, and the first bearing is sleeved on the output shaft.

6. The third harmonic numerically controlled turntable according to claim 5, characterized in that: The reducer also includes a crossed roller bearing, which is arranged on the third harmonic reducer; the outer ring of the crossed roller bearing is connected to the flexible wheel and is integrally arranged on the torque motor component, and a sixth sealing ring is arranged on the mating surface between the flexible wheel and the torque motor component; a second oil seal is arranged at the outer ring of the crossed roller bearing and the inner ring of the crossed roller bearing, and the inner ring of the crossed roller bearing forms a rotating pair with the outer ring of the crossed roller bearing, and is sealed by the second oil seal; the inner ring of the crossed roller bearing is arranged on the other end surface of the steel wheel to form a follower component.

7. The third harmonic numerically controlled turntable according to any one of claims 2 to 4, characterized in that: The motor housing is arranged in the outer shell, the motor stator assembly is arranged in the motor housing, the motor rear end cover is arranged on the motor housing, the second bearing is arranged on the motor housing, the third bearing is arranged on the motor rear end cover, the high-speed shaft is arranged on the second bearing and the third bearing, and the magnetic steel is arranged on the high-speed shaft.

8. The third harmonic numerically controlled turntable according to claim 7, characterized in that: The motor housing is arranged inside the outer shell, and the motor stator assembly is pressed into the inner cavity of the motor housing; the motor rear end cover is arranged on the motor housing, and a seventh sealing ring is arranged on the mating surface between the motor rear end cover and the motor housing, the second bearing is embedded in the motor housing, and a bearing end cover is arranged on the motor housing at the edge of the second bearing, the bearing end cover is used to fix the outer ring of the second bearing, and the third bearing is embedded in the motor rear end cover; the high-speed shaft is embedded in the second bearing and the third bearing, and one end of the high-speed shaft is connected to the third harmonic generator to enable motion transmission between the high-speed shaft and the third harmonic generator; a clamping groove and a shock-absorbing groove are arranged on the high-speed shaft, and a retaining spring is installed in the clamping groove, and the retaining spring is used to fix the inner ring of the second bearing; the shock-absorbing groove is used to prevent over-positioning and buffer the axial and radial vibration of the high-speed shaft; the magnetic steel is arranged on the high-speed shaft.

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