Elevator traction machine with outer rotor shaft brake band-type brake structure

Abstract

The utility model discloses an outer rotor shaft brake band-type brake structure elevator traction machine which comprises a machine shell, the machine shell is in an annular shape, a containing space is formed in the central axis of the machine shell, two bearings are arranged in the containing space, a main shaft is arranged between the two bearings, a stator is arranged at the position of the machine shell, and the stator is connected with the main shaft. The main shaft is coaxially connected with a rotor corresponding to the stator, the rotor of the main shaft is connected with a traction wheel through a bolt, a shaft brake type brake is arranged on the side, away from the traction wheel, of the main shaft, and the main shaft is coaxially connected with a brake disc corresponding to the shaft brake type brake. The beneficial effects of the utility model are that the two bearing positions are installed on the casing, so that one-time processing is facilitated, and concentricity is guaranteed; the brake is arranged at the rear end of the main shaft, so that the width of the traction machine is small, and layout of an elevator shaft is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of traction machines, and in particular relates to an elevator traction machine with an outer rotor shaft brake structure. Background Art

[0002] The elevator traction machine is the power equipment of the elevator. Its function is to transport and transmit power to make the elevator run. Most of the existing permanent magnet synchronous traction machines adopt an outer rotor double push-drum brake structure and an inner rotor shaft brake brake structure. The former has a larger overall width because the brake acts on the rotor, which has certain restrictions on the elevator layout; the latter has two bearings that are not processed in the same process (the two bearings are on two different components), so concentricity is difficult to guarantee and has relatively high processing requirements. Utility Model Content

[0003] The utility model aims to provide an elevator traction machine with an outer rotor shaft brake structure.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An elevator traction machine with an outer rotor shaft brake structure includes a casing, which is annular and has a accommodating space at its central axis, two bearings are arranged in the accommodating space, a main shaft is arranged between the two bearings, a stator is arranged at the casing, a rotor corresponding to the stator is coaxially connected to the main shaft, the rotor of the main shaft is connected to a traction wheel by bolts, a shaft brake is arranged on the side of the main shaft away from the traction wheel, and a brake disc corresponding to the shaft brake is coaxially connected to the main shaft.

[0006] Preferably, the housing is provided with a receiving groove along the length direction of the main shaft, the stator is arranged on a side of the receiving groove close to the main shaft, and one end of the rotor extends into the receiving groove and is located on one side of the stator main shaft.

[0007] Preferably, the shaft brake comprises an electromagnet and an armature, the armature is located between the electromagnet and the brake disc, and a spring is provided between the electromagnet and the armature.

[0008] Preferably, an external gear is integrally formed on the outer peripheral wall of the tail portion of the main shaft, and an internal gear meshing with the external gear is provided on the inner peripheral wall of the brake disc.

[0009] Preferably, the two bearings are tapered bearings.

[0010] Preferably, an encoder is coaxially connected to a side of the main shaft away from the traction sheave.

[0011] The utility model has the following beneficial effects: two bearing positions are mounted on the casing, which is convenient for one-time processing and ensures concentricity; the brake wheel is mounted on the front end of the main shaft, the traction wheel is mounted on the brake wheel, and the brake is arranged at the rear end of the main shaft, so that the width of the traction machine is small, which is convenient for the layout of the elevator shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a partial cross-sectional view of the utility model.

[0013] Among them: a housing 10 , a bearing 12 , a main shaft 14 , a receiving groove 16 , a stator 18 , a rotor 20 , a traction wheel 22 , an electromagnet 24 , an armature 26 , a brake disc 28 , and an encoder 30 . DETAILED DESCRIPTION

[0014] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0015] like Figure 1 As shown, an elevator traction machine with an outer rotor shaft brake structure of the utility model includes an annular casing 10, two bearings 12 are arranged in the accommodation space at the center of the casing 10, a main shaft 14 is arranged between the two bearings 12, and the two bearings 12 are arranged on the same casing 10, which is convenient for one-time processing of the casing 10, improves concentricity, and reduces vibration and noise generated when the main shaft 14 rotates. A receiving groove 16 is opened on one side of the casing 10 along the length direction of the main shaft 14, a stator 18 is arranged on the side of the receiving groove 16 close to the main shaft 14, and a rotor 20 corresponding to the stator 18 is arranged on the side of the receiving groove 16 away from the main shaft 14. The stator 18 is arranged at the casing 10. The main shaft 14 is coaxially connected with a rotor 20 corresponding to the stator 18. The rotor 20 of the main shaft 14 is connected with a traction wheel 22 by bolts. The stator 18 is an iron core wound with a coil. A permanent magnet is arranged on the rotor 20. Alternating current is passed through the coil to periodically and continuously change the magnetic field, so that the rotor 20 rotates under the action of the magnetic field and drives the traction wheel 22 to rotate. A shaft brake is arranged on the side of the magnet main shaft 14 away from the traction wheel 22. A brake disc 28 corresponding to the shaft brake is coaxially connected to the main shaft 14. The shaft brake is arranged in the axial direction of the main shaft 14, so that the width of the entire traction machine is small, which saves space and is convenient for the layout of the elevator shaft or machine room.

[0016] The shaft brake includes an electromagnet 24 and an armature 26, the armature 26 is located between the electromagnet 24 and the brake disc 28, and a spring is arranged between the electromagnet 24 and the armature 26; when the electromagnet 24 is energized, the magnetic force generated attracts the armature 26, the magnetic force is greater than the elastic force of the spring, the armature 26 is away from the brake disc 28, and the main shaft 14 rotates normally; when the electromagnet 24 is de-energized, the magnetic force disappears, the armature 26 moves toward the brake disc 28 under the action of the spring, and applies a relative force to the brake disc 28, thereby increasing the friction between the armature 26 and the brake disc 28 to achieve a braking effect.

[0017] An external gear is integrally formed on the outer peripheral wall of the tail of the main shaft 14, and an internal gear meshing with the external gear is arranged on the inner peripheral wall of the brake disc 28; the meshing of the teeth between the brake disc 28 and the main shaft 14 can ensure the transmission effect, so that there will be no relative rotation between the brake disc 28 and the main shaft 14, and the braking effect is better.

[0018] The two bearings 12 are tapered bearings 12; the tapered roller bearings 12 can bear radial loads and unidirectional axial loads. When the bearings 12 bear radial loads, an axial force component will be generated. The two bearings 12 that can withstand axial forces in opposite directions cooperate to achieve balance, making the main shaft 14 more stable when rotating.

[0019] An encoder 30 is coaxially connected to one side of the main shaft 14 away from the traction wheel 22, and the base of the encoder 30 is arranged on the shaft brake; the encoder 30 is directly connected to the center of the end of the main shaft 14, so that the data measured by the encoder 30 is more accurate.

[0020] It is obvious 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An elevator traction machine with an outer rotor shaft brake structure, characterized in that: It includes a casing, which is annular and has a accommodating space at its axis, two bearings are arranged in the accommodating space, a main shaft is arranged between the two bearings, a stator is arranged at the casing, a rotor corresponding to the stator is coaxially connected to the main shaft, the rotor of the main shaft is connected to a traction wheel through bolts, a shaft brake is arranged on the side of the main shaft away from the traction wheel, and a brake disc corresponding to the shaft brake is coaxially connected to the main shaft.

2. The elevator traction machine with an outer rotor shaft brake structure according to claim 1, characterized in that: The housing is provided with a receiving groove along the length direction of the main shaft, the stator is arranged on a side of the receiving groove close to the main shaft, and one end of the rotor extends into the receiving groove and is located on one side of the stator main shaft.

3. The elevator traction machine with an outer rotor shaft brake structure according to claim 1, characterized in that: The shaft brake comprises an electromagnet and an armature, wherein the armature is located between the electromagnet and the brake disc, and a spring is arranged between the electromagnet and the armature.

4. The elevator traction machine with an outer rotor shaft brake structure according to claim 1, characterized in that: An external gear is integrally formed on the outer peripheral wall of the tail of the main shaft, and an internal gear meshing with the external gear is arranged on the inner peripheral wall of the brake disc.

5. The elevator traction machine with an outer rotor shaft brake structure according to claim 1, characterized in that: The two bearings are tapered bearings.

6. The elevator traction machine with an outer rotor shaft brake structure according to claim 1, characterized in that: An encoder is coaxially connected to a side of the main shaft away from the traction wheel.

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