Servo-driven permanent magnet synchronous gearless traction machine

Abstract

The application discloses a servo-driven permanent magnet synchronous gearless traction machine, which comprises a motor, a brake and a support, the motor and the brake are arranged on the two sides of the support respectively, a rotating shaft is rotationally connected to the center of the support, and one end of the brake is fixedly connected with one end of the rotating shaft; the motor comprises a shell, a stator and a rotor, the stator is fixedly arranged in the shell, end covers are arranged at the two ends of the shell, the two ends of the rotor are rotationally connected with the center of the end covers, an encoder fixing seat is arranged on the surface of the end cover away from the support, and an encoder is arranged on one side of the encoder fixing seat, and the application relates to the technical field of elevator driving. The servo-driven permanent magnet synchronous gearless traction machine has the advantages of optimizing the overall traction machine structure, facilitating installation, reducing noise and vibration, improving the stability and control precision of operation, reducing cost and improving installation efficiency.

Description

Technical Field

[0001] This invention relates to the field of elevator drive technology, specifically to a servo-driven permanent magnet synchronous gearless traction machine. Background Technology

[0002] The traction machine is the power supply device for the elevator motor, driving the elevator car to move up and down, ensuring the elevator's functionality. Currently, domestic home elevator traction machines generally use two methods: 1. Servo motor plus reducer mode, which reduces motor speed and increases motor torque. This method results in an excessively long overall structure, making installation difficult in homes with limited space at the top of the elevator. Furthermore, the motor and reducer generate significant noise and vibration during operation, negatively impacting the user's elevator experience. 2. Variable frequency drive mode for the traction machine. However, this method lacks control precision, resulting in inaccurate floor stops and potential height differences between the car and the ground, further affecting the elevator's usability. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a servo-driven permanent magnet synchronous gearless traction machine, which optimizes the overall traction machine structure, facilitates installation, reduces noise and vibration, improves operational stability and control accuracy, reduces costs, and increases installation efficiency.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a servo-driven permanent magnet synchronous gearless traction machine, comprising a motor, a brake and a bracket, wherein the motor and the brake are respectively disposed on both sides of the bracket, a rotating shaft is rotatably connected to the center of the bracket, and one end of the brake is fixedly connected to one end of the rotating shaft;

[0007] The motor includes a housing, a stator, and a rotor. The stator is fixed inside the housing. End caps are provided at both ends of the housing. The two ends of the rotor are rotatably connected to the center of the end caps. An encoder mounting base is provided on the surface of the end cap away from the support. An encoder is provided on one side of the encoder mounting base.

[0008] The encoder mounting base includes a fixed housing. One side of the fixed housing has a cavity adapted to the encoder. Rotary rods are vertically arranged on both sides of the fixed housing. A connecting cavity is also provided inside the fixed housing. A locking buckle is rotatably connected in the connecting cavity. A worm gear is provided on the surface of the rotating rod and on the side of the locking buckle. The worm gear is engaged with one side of the locking buckle. A locking rod is provided on the surface of the end cover near the encoder mounting base. One end of the locking rod extends into the connecting cavity and engages with the locking buckle. An internal hexagonal block is provided at the top of the rotating rod. An inspection cover is provided on the top of the fixed housing.

[0009] Preferably, the motor and brake are fixedly connected to the bracket, and a hook is provided at the top of the bracket and above the overall center of gravity.

[0010] Preferably, the locking rod is fixed to the surface of the end cover near the encoder mounting base, and the surface of the locking rod is provided with a fixing hole.

[0011] Preferably, the locking buckle includes a semicircular block, one side of which is provided with worm gear teeth, and one end of which is provided with a hook.

[0012] Preferably, the stator includes an iron core and a winding. The iron core is made of non-oriented silicon steel sheets stacked in a skew groove manner, and the winding is made of double-strand round copper enameled wire.

[0013] Preferably, the rotor includes an iron core and magnets, the iron core being made of stacked non-oriented silicon steel sheets, and the magnets being made of neodymium iron boron material.

[0014] Preferably, the rotating shaft and the rotor are fitted with a clearance fit and fixed with a round nut, and the rotating shaft is connected to the bracket through a bearing.

[0015] (III) Beneficial Effects

[0016] This invention provides a servo-driven permanent magnet synchronous gearless traction machine. It possesses the following features:

[0017] Beneficial effects:

[0018] This traction machine can achieve low-speed, high-torque performance without relying on a reducer. Firstly, it employs a structure where the brake and motor are located on opposite sides of the traction sheave, making the overall structure more compact and easier to install. Secondly, the absence of gears results in low operating noise and vibration. Furthermore, it utilizes a servo drive mode, with the traction machine driven by a motor. The high-precision encoder installed on the traction machine shaft significantly improves control accuracy and operational stability, ensuring precise floor stops and greatly optimizing the user's home elevator experience. Compared to existing technologies, it boasts advantages such as compact structure, simple and convenient installation, low noise, small footprint, low vibration, stable operation, precise control, wide application range, and strong compatibility.

[0019] In addition, the locking buckle inside the encoder mounting bracket changes the traditional screw fixing method, avoiding the problem of inconvenience in disassembling from the side with a screwdriver due to narrow space, improving the convenience and simplicity of encoder assembly and disassembly, and facilitating later maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is an exploded view of the overall structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the encoder mounting base of the present invention;

[0023] Figure 4 This is a top view of the encoder mounting base of the present invention;

[0024] Figure 5 This is a schematic diagram of the locking buckle of the present invention;

[0025] Figure 6 This is a schematic diagram of the locking rod of the present invention;

[0026] Figure 7 For the present invention Figure 3 Enlarged view of point A in the middle.

[0027] In the diagram: 1-Stator, 2-Rotor, 3-Housing, 4-Shaft, 5-Bracket, 6-Brake, 7-End Cover, 8-Encoder, 9-Encoder Mounting Base, 91-Fixed Housing, 92-Rotor, 93-Worm Gear, 94-Connecting Cavity, 95-Locking Buckle, 951-Semicircular Block, 952-Hook, 953-Worm Gear Tooth, 96-Hex Socket Block, 97-Inspection Cover, 10-Locking Rod, 101-Fixing Hole, 11-Hook. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-7The present invention provides a technical solution: a servo-driven permanent magnet synchronous gearless traction machine, including a motor, a brake 6 and a bracket 5. The motor and the brake 6 are respectively arranged on both sides of the bracket 5. A rotating shaft 4 is rotatably connected to the center of the bracket 5. A steel cable is wound around the surface of the rotating shaft 4. One end of the brake 6 is fixedly connected to one end of the rotating shaft 4. The rotating shaft 4 and the rotor 2 are fitted with a clearance fit and fixed with a round nut. The rotating shaft 4 is connected to the bracket 5 through a bearing. The rotation of the rotating shaft 4 can be restricted by the brake 6.

[0030] The motor includes a housing 3, a stator 1, and a rotor 2. The stator 1 is fixed inside the housing 3. End covers 7 are provided at both ends of the housing 3. The two ends of the rotor 2 are rotatably connected to the center of the end covers 7. An encoder mounting base 9 is provided on the surface of the end cover 7 away from the bracket 5. An encoder 8 is provided on one side of the encoder mounting base 9. Both the motor power line and the encoder line use direct-plug sockets for easy plugging and unplugging. The power line connects the motor and the servo drive. The servo drive sends speed commands to control the motor rotation. The encoder feeds back the actual speed signal to the servo drive, which then adjusts the speed command according to this signal, thereby achieving closed-loop control and enabling the traction machine to run and start / stop precisely at the set speed.

[0031] The encoder mounting base 9 includes a mounting housing 91. A cavity adapted to the encoder 8 is provided on one side of the mounting housing 91. Rotating rods 92 are vertically arranged on both sides of the mounting housing 91. A connecting cavity 94 is also provided inside the mounting housing 91, and a locking buckle 95 is rotatably connected within the connecting cavity 94. A worm gear 93 is provided on the surface of the rotating rod 92, located on one side of the locking buckle 95, and engages with one side of the locking buckle 95. A locking rod 10 is provided on the surface of the end cover 7 near the encoder mounting base 9. The locking buckle 95 includes a semi-circular block 951, and a worm gear is provided on one curved surface of the semi-circular block 951. The gear tooth 953 and the semi-circular block 951 are provided with a hook 952 at one end. The inner curved surface of the hook 952 is parabolic in shape, so that when the locking buckle 95 rotates, the locking rod 10 can be pulled tighter and tighter. One end of the locking rod 10 extends into the connecting cavity 94 and is engaged with the locking buckle 95. The top of the rotating rod 92 is provided with an internal hexagon block 96. The top of the fixed housing 91 is provided with an inspection cover 97. The encoder 8 can be viewed by opening the inspection cover 97. The locking rod 10 is fixed to the surface of the end cover 7 near the encoder mounting base 9. The surface of the locking rod 10 is provided with a fixing hole 101.

[0032] When it is necessary to disassemble or assemble the encoder 8, turn the rotating rod 92. The worm gear 93 on the surface of the rotating rod 92 drives the locking buckle 95 with worm gear teeth 953 to rotate. At this time, the hook 952 separates from the fixing hole 101, realizing the disassembly of the encoder mounting base 9. When installing the encoder 8, align the connecting cavity 94 at one end of the encoder mounting base 9 with the locking rod 10, merge them, and then turn the rotating rod 92 in the opposite direction. The hook 952 engages with the fixing hole 101, completing the fixation.

[0033] The motor and brake 6 are fixedly connected to the bracket 5, specifically by bolts. A hook 11 is provided on the top of the bracket 5, above the overall center of gravity, which facilitates the hoisting of the traction machine as a whole and improves the transfer efficiency.

[0034] The stator 1 includes an iron core and windings. The iron core is made of non-oriented silicon steel sheets stacked in a skewed slot method. The windings use double-strand round copper enameled wire, which reduces eddy current losses and improves motor efficiency. The skewed slot stacking method reduces motor noise and vibration. The double-strand windings reduce the skin effect and also reduce the difficulty of winding. The use of short-pitch windings and distributed windings reduces the influence of high-order harmonics.

[0035] The rotor 2 includes an iron core and magnets. The iron core is made of non-oriented silicon steel sheets stacked together, and the magnets are made of neodymium iron boron material, which has high coercivity and remanence, ensuring maximum magnetic energy product while also being resistant to high temperature.

[0036] In summary, compared with existing technologies, it has advantages such as compact structure, simple and convenient installation, low noise, small space occupation, low vibration, stable operation, precise control, wide range of applications, and strong compatibility.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A servo-driven permanent magnet synchronous gearless traction machine, comprising a motor, a brake (6), and a support (5), characterized in that: The motor and brake (6) are respectively set on both sides of the bracket (5), and the center of the bracket (5) is rotatably connected to the rotating shaft (4). One end of the brake (6) is fixedly connected to one end of the rotating shaft (4). The motor includes a housing (3), a stator (1) and a rotor (2). The stator (1) is fixed inside the housing (3). End caps (7) are provided at both ends of the housing (3). The two ends of the rotor (2) are rotatably connected to the center of the end caps (7). An encoder mounting base (9) is provided on the surface of the end cap (7) away from the bracket (5). An encoder (8) is provided on one side of the encoder mounting base (9). The encoder mounting base (9) includes a mounting housing (91). A cavity adapted to the encoder (8) is provided on one side of the mounting housing (91). Rotating rods (92) are vertically arranged on both sides of the mounting housing (91). A connecting cavity (94) is also provided inside the mounting housing (91). Locking buckles (95) are rotatably connected to both the upper and lower ends of the connecting cavity (94). Two worm gears (93) are provided on the surface of the rotating rod (92) and on one side of the locking buckle (95). The worm gears (93) are engaged with one side of the locking buckle (95). A locking rod (10) is provided on the surface of the end cover (7) near the encoder mounting base (9). One end of the locking rod (10) extends into the connecting cavity (94) and is fastened to the locking buckle (95). The locking rod (10) is fixed on the surface of the end cover (7) near the encoder mounting base (9). A fixing hole (101) is provided on the surface of the locking rod (10). The top of the rotating rod (92) is provided with an internal hexagonal block (96), and the top of the fixed housing (91) is provided with an inspection cover (97); the locking buckle (95) includes a semi-circular block (951), one side of the semi-circular block (951) is provided with a worm gear tooth (953), and one end of the semi-circular block (951) is provided with a hook (952). The inner curved surface of the hook (952) is parabolic in shape, so that when the locking buckle (95) rotates, the locking rod (10) can be pulled tighter and tighter. One end of the locking rod (10) extends into the connecting cavity (94) and is engaged with the locking buckle (95).

2. The servo-driven permanent magnet synchronous gearless traction machine according to claim 1, characterized in that: The motor and brake (6) are fixedly connected to the bracket (5), and a hook (11) is provided on the top of the bracket (5) above the overall center of gravity.

3. A servo-driven permanent magnet synchronous gearless traction machine according to claim 1, characterized in that: The stator (1) includes an iron core and a winding. The iron core is made of non-oriented silicon steel sheets stacked in a skew groove manner, and the winding is made of double-strand round copper enameled wire.

4. A servo-driven permanent magnet synchronous gearless traction machine according to claim 1, characterized in that: The rotor (2) includes an iron core and a magnet. The iron core is made of non-oriented silicon steel sheets stacked together, and the magnet is made of neodymium iron boron material.

5. A servo-driven permanent magnet synchronous gearless traction machine according to claim 1, characterized in that: The rotating shaft (4) and the rotor (2) are fitted with a clearance and fixed with a round nut. The rotating shaft (4) is connected to the bracket (5) through a bearing.

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