Elevator internal rotor synchronous traction machine

Abstract

This invention provides an internal rotor synchronous traction machine for elevators, which uses an internal rotor to drive a traction sheave, reducing manufacturing costs and improving production efficiency. It includes: a rotating shaft; a motor rotor; a motor stator; a base including a first end cover, a second end cover, and a sleeve portion. One axial end of the sleeve portion has an integral first end cover, and the other axial end of the sleeve portion is fixedly fitted with a second end cover; a traction sheave; and a brake. The motor stator is fixedly mounted on the outer periphery of the inner annular cavity region formed by the sleeve portion. The motor rotor is fixedly fitted in the middle of the rotating shaft along its length direction. The motor rotor is spaced apart from the inner annular cavity of the motor stator. Both ends of the rotating shaft protrude outwards and are positioned by corresponding bearings in the corresponding bearing mounting holes of the first and second end covers. The traction sheave is fixedly mounted on the end of the rotating shaft that protrudes from the first end cover, and a traction sheave cover plate covers the outside of the traction sheave.

Description

Technical Field

[0001] This invention relates to the technical field of traction machine structure, specifically to an internal rotor synchronous traction machine for elevators. Background Technology

[0002] The existing traction machine, whose structure is described in CN112615462B as "Motor for External Rotor Synchronous Traction Machine for Elevators and its Machining and Assembly Method", uses an external rotor structure motor. This requires an inner convex ring seat within the cavity to fix the motor stator, and the inner ring of the inner convex ring seat also needs a corresponding positioning mechanism to support and position the rotating shaft. Since the inner convex ring seat is part of the machine base, it complicates the structure of the machine base during actual production. Furthermore, the inner convex ring seat is required as a positioning reference during the assembly of the rotating shaft, motor stator, and motor rotor, necessitating high precision in the machining and assembly of the inner convex ring seat, resulting in high production costs. Therefore, there is an urgent need to develop an alternative traction machine structure that can reduce costs. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an internal rotor synchronous traction machine for elevators, which uses an internal rotor to drive the traction wheel, thereby reducing manufacturing costs and improving production efficiency.

[0004] An internal rotor synchronous traction machine for elevators, characterized in that it comprises: Shaft; Motor rotor; Motor stator; A base includes a first end cover, a second end cover, and a sleeve portion. One axial end of the sleeve portion is provided with an integral first end cover, and the other axial end of the sleeve portion is fixedly fitted with a second end cover. Traction wheel; And brakes; The motor stator is fixed to the outer periphery of the inner annular cavity formed by the sleeve portion. The motor rotor is fixed to the middle of the shaft along its length. The motor rotor is spaced apart from the inner annular cavity of the motor stator. The two ends of the shaft protrude outwards and are positioned by corresponding bearings in the corresponding bearing mounting holes of the first and second end covers. The traction sheave is fixedly installed at the end of the shaft that protrudes from the first end cover. The traction sheave is covered by a traction sheave cover plate, which is open at the bottom of the traction sheave. A brake friction disc is fitted at the end of the shaft that protrudes from the second end cover. The brake is fixed to the outer surface of the second end cover, and the moving end of the brake is movably positioned toward the brake friction disc.

[0005] Its further features are: The outer circumference of the end of the shaft protruding from the first end cover is a tapered mounting ring surface that tapers from the inside out. A central connecting sleeve is provided at the radial center of the traction wheel. The traction wheel is fixedly fitted onto the tapered mounting ring surface. The central connecting sleeve is fitted onto the tapered mounting ring surface in a conformal manner. The traction wheel cover plate is fixedly mounted to the outer protruding end of the first end cover of the shaft by connecting screws with a ring cloth, ensuring the stable assembly of the traction wheel. The sleeve portion has corresponding supports on both sides of the bottom area along its length, and the supports have positioning holes, which make the base stable and reliable. The sleeve portion also has an upwardly protruding hoisting hole on one side of the central area, which facilitates the hoisting operation of the traction machine. The traction wheel cover plate includes an arc-shaped cover plate and an end cover plate. The inner ring edge of the arc-shaped cover plate is fixed to the end position of the sleeve portion corresponding to the second end cover. The end cover plate is provided with heat dissipation holes and grooves on its surface area to ensure safe and reliable protection of the traction wheel. The brake has a clearance hole at its radial center. The encoder is located inside the clearance hole and is fixed to the center of the corresponding end of the rotating shaft. The outer end face of the clearance hole is covered with a cover plate.

[0006] After adopting the above technical solution, the machine base is composed of an integrated sleeve part, a first end cover, and a second end cover. The inner wall of the sleeve part is provided with a positioning cavity for the motor stator. The motor stator can be directly fixed and installed into the inner ring cavity area formed by the sleeve part. Then, the motor rotor is pre-fixed and sleeved on the rotating shaft. The two ends of the rotating shaft protrude outwards in the length direction and are positioned in the corresponding bearing mounting holes of the first end cover and the second end cover through corresponding bearings. Then, the traction sheave, brake friction disc, and brake are assembled. The assembly process is convenient and quick, and the machine base is simple to manufacture and does not require high-precision machining. It uses an internal rotor to drive the traction sheave, which reduces manufacturing costs and improves production efficiency. Attached Figure Description

[0007] Figure 1 Three-dimensional representation of a specific embodiment of the present invention Figure 1 ; Figure 2 Three-dimensional representation of a specific embodiment of the present invention Figure 2 ; Figure 3 This is a front sectional view of a specific embodiment of the present invention; The names corresponding to the serial numbers in the diagram are as follows: Bearing 1; 10. Rotating shaft, 11. Conical mounting ring, 20. Motor rotor, 30. Motor stator, 40. Frame, 41. First end cover, 42. Sleeve part, 43. Support, 431. Positioning hole, 44. Lifting hole, 50. Second end cover, 60. Traction wheel, 61. Center connecting sleeve, 62. Traction wheel cover plate, 63. Connecting screw, 70. Brake, 71. Moving end, 72. Clearance hole, 80. Traction wheel cover plate, 81. Arc cover plate, 82. End cover plate, 821. Heat dissipation hole groove, 90. Brake friction disc, 100. Encoder, 110. Detailed Implementation

[0008] Elevator internal rotor synchronous traction machine, see Figures 1-3 It includes a rotating shaft 10, a motor rotor 20, a motor stator 30, a frame 40, a traction sheave 60, and a brake 70; The base 40 includes a first end cover 41, a second end cover 50 and a sleeve portion 42. The first end cover 41 is integrally provided at one axial end of the sleeve portion 42, and the second end cover 50 is fixedly installed at the other axial end of the sleeve portion 42. A motor stator 30 is fixedly mounted on the outer periphery of the inner annular cavity formed by the sleeve portion 42. A motor rotor 20 is fixedly mounted on the middle of the shaft 10 along its length. The motor rotor 20 is spaced apart from the inner annular cavity of the motor stator 30. Both ends of the shaft 10 protrude outwards and are positioned by corresponding bearings 1 in the corresponding bearing mounting holes of the first end cover 41 and the second end cover 50. A traction sheave 60 is fixedly mounted on the end of the shaft 10 that protrudes from the first end cover 41. A traction sheave cover plate 80 is provided on the outside of the traction sheave 60. The traction sheave cover plate 80 is provided with an open bottom corresponding to the traction sheave 60 to facilitate the reliable passage of the wire rope. A brake friction disc 90 is fitted on the end of the shaft 10 that protrudes from the second end cover 50. A brake 70 is fixedly mounted on the outer surface of the second end cover 50. The moving end 71 of the brake 70 is movably positioned toward the brake friction disc 90. In practice, when the elevator is running, the brake is energized to generate a magnetic field, causing the moving end of the brake to separate from the brake friction disc 90. When the elevator needs to brake, the brake is de-energized, and the moving end of the brake comes into contact with the brake friction disc 90 to generate friction for braking.

[0009] In a specific embodiment, the outer circumference of the end of the rotating shaft 10 protruding from the first end cover 41 is a tapered mounting ring surface 11 that tapers from the inside out. A central connecting sleeve 61 is provided at the radial center of the traction wheel 60. The central connecting sleeve 61 is fitted onto the tapered mounting ring surface 11 in a conformal manner. The traction wheel cover plate 62 is fixed to the protruding end of the first end cover 41 of the rotating shaft 10 by a ring-shaped connecting screw 63, ensuring that the traction wheel 60 is assembled stably. The sleeve part 42 has corresponding supports 43 on both sides of the bottom area along its length. The supports 43 are provided with positioning holes 431, which makes the base 40 stable and reliable. The sleeve section 42 also has an upwardly protruding hoisting hole 44 on one side of the central area, which facilitates the hoisting operation of the traction machine; The traction sheave cover plate 80 includes an arc-shaped cover plate 81 and an end cover plate 82. The inner ring edge of the arc-shaped cover plate 81 is fixed to the sleeve portion 42 corresponding to the end position of the second end cover 50. The end cover plate 82 is provided with heat dissipation slots 821 on its surface area, which ensures safe and reliable protection for the traction sheave.

[0010] In a specific embodiment, the brake 70 is provided with a clearance hole 72 at its radial center, the encoder 100 is located inside the clearance hole 72 and the encoder 100 is fixed to the center of the corresponding end of the rotating shaft 10, and the outer end face of the clearance hole 72 is covered with a cover plate 110.

[0011] The principle is as follows: The base is composed of an integrated sleeve part, a first end cover, and a second end cover. The inner wall of the sleeve part is provided with a positioning cavity for the motor stator. The motor stator can be directly fixed and installed into the inner ring cavity area formed by the sleeve part. Then, the motor rotor is pre-fixed on the rotating shaft. The two ends of the rotating shaft protrude outwards in the length direction and are positioned in the corresponding bearing mounting holes of the first end cover and the second end cover through corresponding bearings. Then, the traction sheave, brake friction disc, and brake are assembled. The assembly process is convenient and quick, and the base is simple to manufacture and does not require high-precision machining. It uses an internal rotor to drive the traction sheave, which reduces manufacturing costs and improves production efficiency.

[0012] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0013] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An internal rotor synchronous traction machine for elevators, characterized in that, It includes: Shaft; Motor rotor; Motor stator; A base includes a first end cover, a second end cover, and a sleeve portion. One axial end of the sleeve portion is provided with an integral first end cover, and the other axial end of the sleeve portion is fixedly fitted with a second end cover. Traction wheel; And brakes; The motor stator is fixed to the outer periphery of the inner annular cavity formed by the sleeve portion. The motor rotor is fixed to the middle of the shaft along its length. The motor rotor is spaced apart from the inner annular cavity of the motor stator. The two ends of the shaft protrude outwards and are positioned by corresponding bearings in the corresponding bearing mounting holes of the first and second end covers. The traction sheave is fixedly installed at the end of the shaft that protrudes from the first end cover. The traction sheave is covered by a traction sheave cover plate, which is open at the bottom of the traction sheave. A brake friction disc is fitted at the end of the shaft that protrudes from the second end cover. The brake is fixed to the outer surface of the second end cover, and the moving end of the brake is movably positioned toward the brake friction disc.

2. The elevator internal rotor synchronous traction machine according to claim 1, characterized in that: The outer circumference of the end of the shaft protruding from the first end cover is a tapered mounting ring surface that tapers from the inside out. A central connecting sleeve is provided at the radial center of the traction wheel. The traction wheel is fixedly fitted onto the tapered mounting ring surface. The central connecting sleeve is fitted onto the tapered mounting ring surface in a conformal manner. The traction wheel cover plate is fixedly mounted to the outer protruding end of the first end cover of the shaft by connecting screws with a ring cloth.

3. The elevator internal rotor synchronous traction machine according to claim 1, characterized in that: The sleeve portion has corresponding supports on both sides of its bottom region along its length, and the supports have positioning holes.

4. The elevator internal rotor synchronous traction machine according to claim 1, characterized in that: The sleeve portion also has an upwardly protruding lifting hole on one side of its central area.

5. The elevator internal rotor synchronous traction machine according to claim 1, characterized in that: The traction wheel cover plate includes an arc-shaped cover plate and an end cover plate. The inner ring edge of the arc-shaped cover plate is fixed to the end position of the sleeve portion corresponding to the second end cover. The end cover plate is provided with heat dissipation slots on its surface.

6. The elevator internal rotor synchronous traction machine according to claim 1, characterized in that: The brake has a clearance hole at its radial center. The encoder is located inside the clearance hole and is fixed to the center of the corresponding end of the rotating shaft. The outer end face of the clearance hole is covered with a cover plate.

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