Three-phase alternating-current low-voltage servo motor without main shaft and bearing

Abstract

The utility model relates to the technical field of servo motors, in particular to a spindle-free and bearing-free three-phase alternating-current low-voltage servo motor, which comprises a first shell, and a first mounting chamber is formed by the first shell, a front end cover and a rear end cover which are arranged at two ends of the first shell; a second shell is arranged on the outer side of the first shell, and a fan cover plate is arranged at the rear end of the first shell to form a second mounting chamber; a junction box is arranged on the outer wall of the second shell, and a wiring terminal assembly is arranged in the junction box; a rotating shaft sleeve with a hollow cavity is arranged in the first mounting chamber, the rotor core sleeving part is used for sleeving a rotor core, a stator core is arranged between the outer wall of the rotor core and the inner wall of the first mounting chamber, and a winding is arranged on the stator core; an expansion sleeve assembly is further arranged, and the expansion sleeve assembly can lock the outer rotating shaft entering the outer rotating shaft locking cavity. The tail end of the rotating shaft sleeve is provided with a light-braided adapter end cover, and the outer side is provided with a light-braided assembly. The servo motor is simple in structure and good in heat dissipation effect, and the transmission efficiency of the external rotating shaft can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of servo motors, in particular to a three-phase AC low-voltage servo motor without a main shaft or bearings. Background Art

[0002] A servo motor is an engine that controls the operation of mechanical components in a servo system. It is an auxiliary motor indirect speed change device that can convert voltage signals into torque and speed to drive the control object, and has the characteristics of high-precision control of speed and position. Its working principle is that its rotor speed is controlled by the input signal and can respond quickly. In the automatic control system, the servo motor is used as an actuator, with characteristics such as small electromechanical time constant, high linearity, and starting voltage. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. It is widely used in automation equipment that requires precise positioning, high-speed movement, high torque output, high stability, low noise, etc., such as CNC machine tools, semiconductor manufacturing, imaging equipment, packaging equipment, and robotics.

[0003] Multi-wire cutting is a high-efficiency cutting technology developed in response to the needs of integrated production. Since downstream industries such as photovoltaics have high requirements for equipment processing accuracy and stability, they have high requirements for the technical strength of equipment providers. They can solve various problems that arise during the use of equipment, improve technology and processes according to customer needs, continuously update products, meet the needs of updating technical indicators and improve production efficiency. It requires the use of a coupling-type fixed client shaft, and the front end of the motor can be inserted into the workbench and assembled with the shaft for fixed drive, thereby saving couplings and fixed brackets on the machine, improving transmission efficiency, and reducing mechanical failure rates.

[0004] In traditional servo systems, the numerous mechanical transmission components on the drive shaft limit the operating performance and reliability, and also greatly increase the operating cost. The existing method of driving the mechanical spindle through a servo motor connected to a belt has a long transmission chain, low efficiency, low precision, easy wear and slipping of the belt, short maintenance cycle, and slow dynamic response. The traditional complete motor contains 1 to 2 sets of bearings. Due to too many positioning fulcrums, the bearings will heat up and vibrate and make noise under long-term working conditions, thereby affecting the accuracy of the encoder. Although the frameless direct drive system has the characteristics of small space occupation, high rigidity and high dynamic response, the high cost, cumbersome installation and complex structure cannot make it meet the working conditions of this industry.

[0005] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned problems of the prior art and provide a spindle-less and bearingless three-phase AC low-voltage servo motor to solve the technical problems of low transmission efficiency, high cost, complex structure and difficult installation, as well as damage to mechanical parts due to poor heat dissipation in traditional servo motors.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A spindle-less and bearing-less three-phase AC low-voltage servo motor, comprising a first housing, wherein two ends of the first housing are respectively provided with a front end cover and a rear end cover corresponding thereto, wherein the front end cover, the first housing and the rear end cover are connected to each other to form a first installation chamber, and the front end cover through hole and the rear end cover through hole which can communicate with the first installation chamber are respectively provided on the front end cover and the rear end cover; a second housing which can be partially sleeved on the outer side of the first housing is provided, and a fan cover is provided at the rear end of the second housing, and a second installation chamber is formed between the fan cover, the inner cavity of the second housing and the rear end cover; a junction box with a third installation chamber is provided on the outer wall of the second housing; a first wire hole is provided on the first housing, a second wire hole is provided on the second housing, and a third wire hole is provided on the bottom wall of the junction box, the first wire hole, the second wire hole and the third wire hole can connect the first installation chamber with the third installation chamber, and the rear end cover is also provided with a threading hole which can connect the first installation chamber with the second installation chamber hole; a terminal assembly is arranged in the third installation chamber; a rotating shaft sleeve with a hollow cavity is arranged in the first installation chamber, the rotating shaft sleeve is T-shaped, including a rotor core sleeve connection part and a limiting part connected to each other, the rotor core sleeve connection part is used for the rotor core sleeve connection, a stator core is arranged between the outer wall of the rotor core and the inner wall of the first installation chamber, and a winding is arranged on the stator core; the limiting part is used to radially limit the rotor core on one side; the hollow cavity includes a corresponding to the rotor core sleeve connection part An external shaft through-hole and an external shaft locking cavity corresponding to the limiting portion; a expansion sleeve assembly is arranged in the external shaft locking cavity, and the expansion sleeve assembly can lock the external shaft entering the external shaft locking cavity; an optical fiber adapter end cover is arranged at the end of the shaft sleeve, and an outwardly protruding adapter boss is arranged at the axial position of the optical fiber adapter end cover, and the adapter boss is connected with the optical fiber assembly arranged on the outside of the rear end cover through the through hole of the rear end cover; a fan assembly is arranged in the second installation chamber for heat dissipation.

[0009] Furthermore, the outer wall of the first shell is provided with a plurality of slides, and the slides are provided with a plurality of slide grooves; the inner wall of the second shell matches the slides, and a slide buckle corresponding to the slide groove is provided on the inner wall of the second shell, and the front end of the slide buckle is slidably connected along the rear end of the slide groove.

[0010] Furthermore, mutually symmetrical limiting slide grooves are arranged on the inner wall of the slide groove, and the slide buckle includes a pair of L-shaped limiting sliding blocks facing oppositely, and the L-shaped limiting sliding blocks can perform limiting sliding with the limiting slide grooves.

[0011] Furthermore, a heat dissipation channel capable of connecting the third installation chamber with the outside is formed between the non-contact surface of the second shell and the first shell and the outer wall of the first shell.

[0012] Furthermore, the junction box includes a box body connected to the outer wall of the second shell, and an upper cover corresponding thereto; the terminal assembly includes a terminal rail arranged in the third installation chamber, and a three-phase terminal that can slide along the terminal rail.

[0013] Furthermore, a plurality of wiring guide sleeves are arranged on the side of the box body so that the external wiring harness can enter the third installation chamber.

[0014] Furthermore, the expansion sleeve assembly includes a first expansion sleeve and a second expansion sleeve embedded in the external shaft locking cavity, the first expansion sleeve can be sleeved on the second expansion sleeve to form an annular gap therebetween; the sleeve surfaces of the first expansion sleeve and the second expansion sleeve are inclined surfaces.

[0015] Furthermore, both the first expansion sleeve and the second expansion sleeve are provided with expansion and contraction joints.

[0016] Furthermore, the optical encoder assembly includes a shock-resistant optical encoder connecting disk with an inner ring fixed to the rear end cover, a shock-resistant optical encoder rotating shaft is arranged in the inner ring of the disk, one end of the shock-resistant optical encoder rotating shaft is connected to the shock-resistant optical encoder located in the inner ring of the disk, and the other side of the shock-resistant optical encoder is connected to the adapter boss; the other end of the shock-resistant optical encoder rotating shaft is movably connected to an optical encoder arranged on the outside of the shock-resistant optical encoder connecting disk.

[0017] Furthermore, a first connecting fork embedding groove and a second connecting fork embedding groove are respectively opened on both sides of the anti-vibration light braid, a first connecting fork is embedded in the first connecting fork embedding groove, and a second connecting fork is embedded in the second connecting fork embedding groove, the first connecting fork is used to connect to the adapter boss, and the second connecting fork is used to connect to one end of the anti-vibration light braid rotating shaft.

[0018] The utility model provides a three-phase AC low-voltage servo motor without a main shaft and bearings. The functional components are installed through independent chambers, and the internal and external wiring is orderly connected through a unified junction box, which is easy to assemble and disassemble. In addition, the expansion sleeve component with adjustable tightness can completely lock the external shaft; the optical editing component can realize accurate and stable monitoring of the external shaft. This servo motor not only has a simple structure and good heat dissipation effect, but also can effectively improve the transmission efficiency of the external shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a spindle-less and bearing-less three-phase AC low-voltage servo motor from a first perspective of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a spindle-less and bearing-less three-phase AC low-voltage servo motor from a second perspective of the utility model;

[0021] Figure 3 It is a cross-sectional view of a three-phase AC low-voltage servo motor without a main shaft and bearings according to the utility model;

[0022] Figure 4 This is an exploded view of the housing of a three-phase AC low-voltage servo motor without a main shaft and bearings described in the utility model;

[0023] Figure 5 It is a cross-sectional view of the connection between the transfer sleeve and the expansion sleeve assembly of a three-phase AC low-voltage servo motor without a main shaft and bearings described in the utility model;

[0024] Figure 6 This is an exploded view of a transfer sleeve and expansion sleeve assembly of a three-phase AC low-voltage servo motor without a main shaft and bearings described in the utility model;

[0025] Figure 7 This is an exploded view of the optical braid assembly in a three-phase AC low-voltage servo motor without a main shaft and bearings described in the utility model;

[0026] Figure 8 This is a first-perspective exploded view of the connection between the anti-vibration optical braid and the connecting fork in the three-phase AC low-voltage servo motor without a main shaft and bearings described in the utility model;

[0027] Fig. 9 This is an exploded view from a second perspective of the connection between the anti-vibration optical braid and the connecting fork in the three-phase AC low-voltage servo motor without a main shaft and bearings described in the utility model.

[0028] Graphic marking:

[0029] 1-first housing, 101-first wire hole, 102-slide table, 103-slide groove, 104-limiting slide groove, 105-guide groove;

[0030] 2-second housing, 201-second wire hole, 202-sliding buckle, 203-limiting sliding groove, 204-guide strip;

[0031] 3-junction box, 301-third wire hole, 302-box body, 303-upper cover;

[0032] 4-terminal assembly, 401-terminal rail, 402-three-phase terminal, 403-terminal guide sleeve;

[0033] 5-rotating shaft sleeve, 501-rotor core sleeve connection part, 502-limiting part, 503-external rotating shaft through cavity, 504-external rotating shaft locking cavity;

[0034] 6-expansion sleeve assembly, 601-first expansion sleeve, 602-second expansion sleeve, 603-annular gap, 604-expansion and contraction joint, 605-locking threaded through hole, 606-locking screw;

[0035] 7-optical adapter end cover, 701-adapter boss, 702-locking screw through hole;

[0036] 8-optical encoder assembly, 801-anti-vibration optical encoder connection disk, 802-disk inner ring, 803-anti-vibration optical encoder shaft, 804-anti-vibration optical encoder, 805-optical encoder encoder, 806-first connecting fork embedding groove, 807-second connecting fork embedding groove, 808-first connecting fork, 809-second connecting fork, 810-adapting boss clamping groove, 811-anti-vibration optical encoder shaft clamping groove, 812-elastic bracket, 813-encoder shaft sleeve, 814-rear end cover protective cover;

[0037] 9-rear end cover, 901-rear end cover through hole, 902-threading hole;

[0038] 10-front end cover, 1001-front end cover through hole;

[0039] 11-Fan cover;

[0040] 12- first installation room;

[0041] 13- Second installation room;

[0042] 14- The third installation room;

[0043] 15-lead sleeve;

[0044] 16- rotor core;

[0045] 17- Winding;

[0046] 18-Inertia disk;

[0047] 19- fan assembly;

[0048] 20- heat dissipation channel;

[0049] 21- stator core;

[0050] 22-Ball bearing. DETAILED DESCRIPTION

[0051] The utility model is further described in detail below based on the accompanying drawings and embodiments. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] like Figure 1 to Figure 4 As shown, a spindle-less and bearing-less three-phase AC low-voltage servo motor comprises a first housing 1, and two ends of the first housing 1 are respectively provided with a front end cover 10 and a rear end cover 9 corresponding thereto, and the front end cover 10, the first housing 1 and the rear end cover 9 are connected to each other to form a first installation chamber 12, and the front end cover 10 and the rear end cover 9 are respectively provided with a front end cover through hole 1001 and a rear end cover through hole 901 which can be communicated with the first installation chamber 12; a second housing 2 which can be partially sleeved is provided on the outer side of the first housing 1, and a fan cover 11 is provided at the rear end of the second housing 2, and a second installation chamber 13 is formed between the fan cover 11, the inner cavity of the second housing 2 and the rear end cover 9; it should be noted that, in this embodiment, the first housing 1, the second housing 2, the front end cover 10 and the rear end cover 9 are all made of metal, preferably aluminum; wherein the first housing 1 and the second housing 2 are made of aluminum profiles.

[0053] The sleeve-type shell provided by this solution can not only provide a sufficiently large operating space for the installation of components in the installation cavity, but also adjust the space of the second installation chamber 13 by sliding the first shell 1 and the second shell 2. This separate structure can effectively improve the assembly efficiency.

[0054] A junction box 3 with a third installation chamber 14 is provided on the outer wall of the second housing 2; a first wire hole 101 is provided on the first housing 1, a second wire hole 201 is provided on the second housing 2, and a third wire hole 301 is provided on the bottom wall of the junction box 3. The first wire hole 101, the second wire hole 201 and the third wire hole 301 can connect the first installation chamber 12 and the third installation chamber 14. The rear end cover 9 is also provided with a threading hole 902 that can connect the first installation chamber 12 and the second installation chamber 13; a terminal assembly 4 is provided in the third installation chamber 14;

[0055] Specifically, this solution is mainly used to realize the need of electrical connection of various functional components in the first installation chamber 12 and the second installation chamber 13, that is, the wiring harness of the components located in the first installation chamber 12 directly enters the third installation chamber 14 through the first wire hole 10, the second wire hole 201 and the third wire hole 301;

[0056] The wiring harness of the components in the second installation chamber 13 enters the first installation chamber 12 through the wire threading hole, and then enters the third installation chamber 14 through the first wire hole 10, the second wire hole 201 and the third wire hole 301. Thus, the wiring harness of each functional component in the first installation chamber 12 and the second installation chamber 13 is uniformly guided to the third installation chamber 14, so as to realize the electrical connection operation with the outside.

[0057] In order to facilitate the lead-in, in this embodiment, a lead-in sleeve 15 is embedded in the first wire hole 101 , the second wire hole 201 and the third wire hole 301 .

[0058] A rotating shaft sleeve 5 with a hollow cavity is arranged in the first installation chamber 12. The rotating shaft sleeve 5 is T-shaped and includes a rotor core sleeve connection portion 501 and a limiting portion 502 which are connected to each other. The rotor core sleeve connection portion 501 is used for sleeve connection of the rotor core 16. A stator core 21 is arranged between the outer wall of the rotor core 16 and the inner wall of the first installation chamber 12. A winding 17 is arranged on the stator core 21. A thermistor is arranged in the winding 17 for monitoring the temperature value. The limiting portion 502 is used for radially limiting the rotor core 16 on one side. The hollow cavity includes an external rotating shaft through cavity 503 corresponding to the rotor core sleeve connection portion 501, and an external rotating shaft locking cavity 504 corresponding to the limiting portion 502. An expansion sleeve assembly 6 is arranged in the external rotating shaft locking cavity 504, and the expansion sleeve assembly 6 can lock the external rotating shaft entering the external rotating shaft locking cavity 504.

[0059] Specifically, the front end of the shaft sleeve 5 is aligned with one end of the external shaft and sleeved thereon. One end of the external shaft enters the external shaft locking cavity 504 after passing through the external shaft through-cavity 503 and is sleeved by the expansion sleeve assembly 6. By adjusting the expansion sleeve assembly 6, it is achieved that it only hugs the outer wall of the external shaft, thereby achieving the purpose of locking the external shaft.

[0060] As an optimization of this embodiment, an inertia disk 18 is further provided between the limiting portion 502 and the rotor core 16. By using the inertia disk 18, it is possible to avoid using a motor with a large starting torque, which can not only effectively reduce the power consumption of the motor, but also reduce the deflection of the motor shaft, thereby helping to improve the stability of the motor rotation.

[0061] The end of the rotating shaft sleeve 5 is provided with an optical fiber adapter end cover 7, and an outwardly protruding adapter boss 701 is provided at the axial center position of the optical fiber adapter end cover 7, and the adapter boss 701 is connected to the optical fiber assembly 8 provided on the outer side of the rear end cover 9 through the rear end cover through hole 901;

[0062] A fan assembly 19 is disposed in the second installation chamber 13 for heat dissipation; in this embodiment, the fan assembly 19 is a centrifugal fan.

[0063] like Figure 4 As shown, in this embodiment, the outer wall of the first shell 1 is provided with a plurality of slides 102, and the slides 102 are provided with a plurality of slide grooves 103; the inner wall of the second shell 2 matches the slides 102, and a slide buckle 202 corresponding to the slide groove 103 is provided on the inner wall of the second shell 2, and the front end of the slide buckle 202 is slidably connected along the rear end of the slide groove 103, thereby realizing the second shell 2 being sleeved on the first shell 1.

[0064] In addition, mutually symmetrical limiting grooves 104 are arranged on the inner wall of the slide groove 103, so that the cross-section of the slide groove 103 is cross-shaped or T-shaped, and the slide buckle 202 includes a pair of L-shaped limiting sliders 203 facing oppositely, and the L-shaped limiting sliders 203 can make limited sliding movements with the limiting slide groove 203; a guide groove 105 is also arranged on the slide table adjacent to the slide groove 103, and correspondingly, a guide bar 204 corresponding to the guide groove 105 is arranged on the inner wall of the second shell 2. Before the second shell 2 and the first shell 1 are mounted, the front end of the guide bar 204 is calibrated with the rear end of the guide groove 105, and then they are directly inserted. While realizing the insertion of the guide bar 204 and the guide groove 105, the slide buckle 202 can also be quickly connected with the limiting slide groove 104, and then it can be slid to a predetermined position.

[0065] like Figure 3 and Figure 4 As shown, it should be noted that, in this embodiment, a heat dissipation channel 20 capable of connecting the third installation chamber 14 with the outside is formed between the non-contact surface of the second shell 2 and the first shell 1 and the outer wall of the first shell 1. When the fan assembly 19 is working, airflow will be formed in the heat dissipation channel 20, thereby achieving heat dissipation at the junction of the outer wall of the first shell 1 and the inner wall of the second shell 2; in addition, it should be noted that in this embodiment, a heat dissipation hole 1101 for fan ventilation is opened on the fan cover 11.

[0066] like Figure 1 to Figure 3As shown, the junction box 3 in this embodiment includes a box body 302 connected to the outer wall of the second housing 2, and an upper cover 303 corresponding thereto. The upper cover 303 and the box body 302 are buckled together to achieve sealing of the third installation chamber 14, thereby preventing interference of the external environment to the interior; the terminal assembly 4 includes a terminal guide rail 401 arranged in the third installation chamber 14, and a three-phase terminal 402 that can slide along the terminal guide rail 401. The movable three-phase terminal 402 can be conveniently manually adjusted in its position in the third installation chamber 14, thereby facilitating wiring installation. In addition, it should be noted that the junction box 3 in this embodiment is made of hard material, such as metal or hard plastic.

[0067] In addition, a plurality of wiring guide sleeves 403 are provided on the side of the box body 302 so that the external wiring harness can enter the third installation chamber 14; it should be noted that the wiring guide sleeves 403 in this embodiment include but are not limited to encoder line wiring guide sleeves, power line wiring guide sleeves and fan power supply line wiring guide sleeves, etc.

[0068] like Figure 5 and Figure 6 As shown, the expansion sleeve assembly 6 in this embodiment includes a first expansion sleeve 601 and a second expansion sleeve 602 embedded in the external shaft locking cavity 504, the first expansion sleeve 601 can be sleeved on the second expansion sleeve 602, and an annular gap 603 is formed therebetween; when pressure is applied to the second expansion sleeve 602 toward the first expansion sleeve 601, the width of the annular gap 603 will gradually decrease, and the inner diameter of the inner ring of the second expansion sleeve 602 will gradually decrease, thereby achieving a tight hold on the external shaft sleeved by the inner ring; the sleeve surfaces of the first expansion sleeve 601 and the second expansion sleeve 602 are inclined surfaces with an inclination of 10° to 45°, which can better facilitate the adjustment of the width of the annular gap 603.

[0069] As an optimization of this embodiment, expansion joints 604 are provided on the first expansion sleeve 601 and the second expansion sleeve 602. The expansion joints 604 can cause the outer diameters of the first expansion sleeve 601 and the second expansion sleeve 602 to deform when the first expansion sleeve 601 and the second expansion sleeve 602 are mutually sleeved and pressed, thereby better adapting to the locking of external rotating shafts with different inner diameters.

[0070] It should be noted that in this embodiment, the first expansion sleeve 601 and the second expansion sleeve 602 are both made of rubber material, which has the advantages of high wear resistance, high temperature resistance, aging resistance and good elasticity.

[0071] As an optimization of this embodiment, mutually symmetrical locking threaded through holes 605 are respectively provided on the first expansion sleeve 601 and the second expansion sleeve 602, and are locked and connected by locking screws 606. By rotating the locking screws 606 clockwise or counterclockwise, the width of the annular gap 603 can be adjusted to achieve the purpose of locking the external shaft.

[0072] The optical fiber adapter end cover 7 is also provided with a locking screw through hole 702 corresponding to the position of the locking threaded through hole 605. The locking screw through hole 702 can facilitate the penetration of the locking screw 606 so as to adjust the locking screw 606 without removing the end cover, that is, a screwdriver is passed through the locking screw through hole 702 and acts on the locking screw 606 located in the external shaft locking cavity 504 and already screwed to the locking threaded through hole 605.

[0073] like Figure 3 As shown, the optical encoder assembly 8 includes a shock-resistant optical encoder connection disk 801 with a disk inner ring 802 fixed to the rear end cover 9, a shock-resistant optical encoder shaft 803 is arranged in the disk inner ring 802, one end of the shock-resistant optical encoder shaft 803 is connected to a shock-resistant optical encoder 804 located in the disk inner ring 802, the shock-resistant optical encoder 804 is used for shock resistance, to prevent the motor from axial displacement and damage to the encoder during long-term operation, and the other side of the shock-resistant optical encoder 804 is connected to the adapter boss 701; the other end of the shock-resistant optical encoder shaft 803 is movably connected to an optical encoder 805 arranged on the outer side of the shock-resistant optical encoder connection disk 801; a temperature sensor is arranged in the optical encoder 805, which can monitor the temperature rise change of the motor assembly in real time;

[0074] Specifically, the optical encoding component 8 in this embodiment includes a shock-resistant optical encoding 804, a shock-resistant optical encoding connecting disk 801, an inductive code disk (not marked in the figure) and an optical encoding encoder 805, wherein the inductive code disk is a transparent disc-type, and its rotation center matches the rotation center of the rotating shaft sleeve. The optical encoding PCB board is installed on the inductive code disk with screws. The rotating shaft sleeve rotates to drive the code disk, and then outputs a number of pulse signals through the photoelectric detection device. The current motor speed can be calculated based on the number of pulses per second of the signal, and two optical codes with a phase difference of 90° can be output to determine the rotation direction of the motor.

[0075] It should be noted that, in this embodiment, the optical braid assembly 8 is an integral assembly, and the anti-vibration optical braid connection plate 801 and the anti-vibration optical braid 804 at the end of the rotating shaft sleeve are fixed to the rear end cover 9 by screws.

[0076] In order to facilitate the free rotation of the anti-vibration optical weft shaft 803 relative to the anti-vibration optical weft connecting disk 801 , the outer wall of the anti-vibration optical weft shaft 803 is connected to the inner ring 802 of the anti-vibration optical weft connecting disk 801 via a ball bearing 22 .

[0077] As an optimization of this solution, Figure 7 and Figure 8 As shown, a first connecting fork embedding groove 806 and a second connecting fork embedding groove 807 are respectively opened on both sides of the anti-vibration light braid 804, a first connecting fork 808 is embedded in the first connecting fork embedding groove 806, and a second connecting fork 809 is embedded in the second connecting fork embedding groove 807. The first connecting fork 808 is used to connect to the transfer boss 701, and the second connecting fork 809 is used to connect to one end of the anti-vibration light braid rotating shaft 803.

[0078] Specifically, a transfer boss clamping groove 810 capable of clamping the transfer boss 701 is provided at the axial position of the first connecting fork 808, and the transfer boss 701 is clamped by the transfer boss clamping groove 810 to fix the optical braid transfer end cover 7 and the anti-vibration optical braid 804; an anti-vibration optical braid shaft clamping groove 811 capable of clamping the anti-vibration optical braid shaft 803 is provided at the axial position of the second connecting fork 809, and the anti-vibration optical braid shaft clamping groove 811 is connected with the end of the anti-vibration optical braid shaft 803 to fix the anti-vibration optical braid shaft 803 and the anti-vibration optical braid 804, so that when the shaft sleeve 803 rotates, the anti-vibration optical braid 804 and the anti-vibration optical braid shaft 803 can rotate synchronously.

[0079] In addition, there is a gap between the anti-vibration optical encoder 804 and the connecting fork, which can prevent the motor from vibrating during long-term operation and causing axial movement of the contact encoder to generate a failure alarm, thereby improving stability.

[0080] As an optimization of this solution, the optical encoder 805 is connected to the outer wall of the anti-vibration optical encoder connection disk 801 through an elastic bracket 812, thereby providing a certain elastic space for the optical encoder 805.

[0081] In addition, an encoder sleeve 813 facing the anti-vibration optical encoder shaft 803 is provided at the axial position of the optical encoder 803, and the encoder sleeve 813 can be movably sleeved on the end of the anti-vibration optical encoder shaft 803 so that the anti-vibration optical encoder shaft 803 can freely rotate relative to the encoder sleeve 813.

[0082] Finally, a rear end cover 814 is also provided on the outer side of the optical encoder 805 , and the rear end cover 814 can seal the optical encoder 805 , thereby better protecting the optical encoder component 8 .

[0083] The above description is only for illustrating the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-phase AC low-voltage servo motor without a main shaft and bearings, characterized in that: The invention comprises a first shell (1), wherein two ends of the first shell (1) are respectively provided with a front end cover (10) and a rear end cover (9) corresponding thereto, wherein the front end cover (10), the first shell (1) and the rear end cover (9) are connected to each other to form a first installation chamber (12), and the front end cover (10) and the rear end cover (9) are respectively provided with a front end cover through hole (1001) and a rear end cover through hole (901) capable of communicating with the first installation chamber (12); a second shell (2) capable of being partially sleeved is provided on the outer side of the first shell (1), and a fan cover plate (11) is provided at the rear end of the second shell (2), and a second installation chamber (13) is formed between the fan cover plate (11), the inner cavity of the second shell (2) and the rear end cover (9); A junction box (3) with a third installation chamber (14) is provided on the outer wall of the second housing (2); a first wire hole (101) is provided on the first housing (1), a second wire hole (201) is provided on the second housing (2), and a third wire hole (301) is provided on the bottom wall of the junction box (3); the first wire hole (101), the second wire hole (201) and the third wire hole (301) are capable of connecting the first installation chamber (12) and the third installation chamber (14); the rear end cover (9) is also provided with a wire threading hole (902) capable of connecting the first installation chamber (12) and the second installation chamber (13); a terminal assembly (4) is provided in the third installation chamber (14); A rotating shaft sleeve (5) with a hollow cavity is arranged in the first installation chamber (12); the rotating shaft sleeve (5) is T-shaped and comprises a rotor core sleeve connection portion (501) and a stop portion (502) connected to each other; the rotor core sleeve connection portion (501) is used for sleeve connection of a rotor core (16); a stator core (21) is arranged between an outer wall of the rotor core (16) and an inner wall of the first installation chamber (12); a winding (17) is arranged on the stator core (21); The limiting portion (502) is used to perform radial limiting on one side of the rotor core (16); the hollow cavity comprises an external shaft through-hole (503) corresponding to the rotor core sleeve connection portion (501), and an external shaft locking cavity (504) corresponding to the limiting portion (502); an expansion sleeve assembly (6) is arranged in the external shaft locking cavity (504), and the expansion sleeve assembly (6) can lock the external shaft entering the external shaft locking cavity (504); An optical fiber adapter end cover (7) is provided at the end of the rotating shaft sleeve (5), and an outwardly protruding adapter boss (701) is provided at the axial center position of the optical fiber adapter end cover (7), and the adapter boss (701) is connected to the optical fiber assembly (8) provided on the outside of the rear end cover (9) through the rear end cover through hole (901); A fan assembly (19) is arranged in the second installation chamber (13) for heat dissipation.

2. The three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 1 is characterized in that: The outer wall of the first shell (1) is provided with a plurality of slides (102), and the slides (102) are provided with a plurality of slide grooves (103); the inner wall of the second shell (2) matches the slides (102), and a slide buckle (202) corresponding to the slide groove (103) is provided on the inner wall of the second shell (2), and the front end of the slide buckle (202) is slidably sleeved along the rear end of the slide groove (103).

3. The three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 2 is characterized in that: Mutually symmetrical limiting sliding grooves (104) are provided on the inner wall of the sliding groove (103).

4. A three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 2 or 3, characterized in that: A heat dissipation channel (20) capable of connecting the third installation chamber (14) with the outside is formed between the non-contact surface of the second shell (2) and the first shell (1) and the outer wall of the first shell (1).

5. The three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 1 is characterized in that: The junction box (3) comprises a box body (302) connected to the outer wall of the second shell (2), and an upper cover (303) corresponding thereto.

6. The three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 5 is characterized in that: A plurality of wiring guide sleeves (403) are arranged on the side of the box body (302) so that an external wiring harness can enter the third installation chamber (14).

7. The three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 1 is characterized in that: The expansion sleeve assembly (6) comprises a first expansion sleeve (601) and a second expansion sleeve (602) embedded in the external shaft locking cavity (504); the first expansion sleeve (601) can be sleeved onto the second expansion sleeve (602) to form an annular gap (603) between the two.

8. The three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 7 is characterized in that: The first expansion sleeve (601) and the second expansion sleeve (602) are both provided with expansion and contraction joints (604).

9. The three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 1, characterized in that: The optical encoder assembly (8) comprises a shock-resistant optical encoder connecting disk (801) with an inner disk ring (802) fixed to the rear end cover (9); a shock-resistant optical encoder rotating shaft (803) is arranged in the inner disk ring (802); one end of the shock-resistant optical encoder rotating shaft (803) is connected to the shock-resistant optical encoder (804) located in the inner disk ring (802); the other side of the shock-resistant optical encoder (804) is connected to the adapter boss (701); the other end of the shock-resistant optical encoder rotating shaft (803) is movably connected to an optical encoder (805) arranged on the outside of the shock-resistant optical encoder connecting disk (801).

10. The three-phase AC low-voltage servo motor without a main shaft and bearings according to claim 9, characterized in that: A first connecting fork embedding groove (806) and a second connecting fork embedding groove (807) are respectively provided on both sides of the anti-vibration optical braid (804); a first connecting fork (808) is embedded in the first connecting fork embedding groove (806); a second connecting fork (809) is embedded in the second connecting fork embedding groove (807); the first connecting fork (808) is used to connect to the transfer boss (701); and the second connecting fork (809) is used to connect to one end of the anti-vibration optical braid rotating shaft (803).

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