Brake rear-mounted self-aligning structure traction machine

Abstract

The utility model discloses a brake rear -positioned aligning structure tractor, it includes frame, main shaft penetrates frame and is connected with tractor wheel, and the aligning roller bearing is arranged between frame and tractor wheel, and frame is provided with motor ring cavity, and the inside of motor ring cavity is provided with stator winding iron core and rotor, and rotor is connected with main shaft, and the deep groove ball bearing is arranged between frame and main shaft, and the rear end of frame is provided with rear end cover, and one side of rear end cover is provided with brake. The utility model discloses a brake is installed in frame rear end, has improved the overall compactness and space utilization of tractor, and is convenient for installation and maintenance. Through adopting the main shaft and tractor wheel cooperation of 1:10 taper ratio, and plus the form of main shaft cover plate axial locking, the interference self -locking of tractor wheel and main shaft is realized, and the safety is improved. Through the reasonable arrangement aligning roller bearing and deep groove ball bearing, the aligning ability and the carrying capacity of tractor have been improved. Through setting up the rear end cover of megaphone shape, the normal use of rear -positioned brake is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of traction machines, and in particular to a self-aligning traction machine with a rear-mounted brake. Background Technology

[0002] In the field of modern elevator traction machine technology, the rear-mounted brake traction machine, as a core component of the elevator power system, directly affects the overall operating efficiency and maintenance costs of the elevator. Currently, most mainstream rear-mounted brake traction machines on the market adopt an internal rotor design. Although the technology is mature, there is still significant room for improvement in cost control, structural optimization, and performance enhancement. The internal rotor design has limitations in material utilization efficiency and space layout, leading to higher manufacturing costs. Furthermore, bearings, as critical components in the traction machine, directly affect the overall machine performance in terms of lifespan and stability. In existing technologies, the bearing arrangement often does not fully consider load distribution, and improper concentricity control of the front and rear bearings can easily cause vibration, abnormal noise, or even jamming failures, seriously threatening elevator operating safety. Additionally, the brake disc of the rear-mounted brake bears enormous stress during braking; if the rear end cover design is unreasonable, it can easily lead to deformation, thereby affecting braking performance and threatening elevator operating safety.

[0003] Therefore, it is necessary to design a self-aligning traction machine with a rear-mounted brake to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a self-aligning traction machine with a rear-mounted brake that can solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A self-aligning traction machine with a rear-mounted brake includes a base, a traction sheave, a main shaft, a stator winding core, a rotor, and a brake. The traction sheave is located at the front end of the base. The main shaft passes through the base and connects to the traction sheave. A self-aligning roller bearing is provided between the base and the traction sheave. The base has an inwardly recessed motor annular cavity. The stator winding core and the rotor are located inside the motor annular cavity. The rotor is located outside the stator winding core and is connected to the main shaft. A deep groove ball bearing is provided between the base and the main shaft. A rear end cover is provided at the rear end of the base, and the brake is located on one side of the rear end cover.

[0007] Preferably, the traction sheave is provided with a first connecting part that connects to the end of the main shaft, the end of the main shaft is interference-fitted with the first connecting part, and the self-aligning roller bearing is sleeved on the first connecting part.

[0008] Preferably, a spindle cover plate is provided on the end of the spindle near the traction sheave, and a groove is provided on the traction sheave for mounting the spindle cover plate.

[0009] Preferably, the taper ratio of the end of the main shaft near the traction sheave is 1:10.

[0010] Preferably, the base is provided with a second connecting part that extends into the interior of the traction sheave, the self-aligning roller bearing is disposed between the second connecting part and the first connecting part, and a bearing pressure plate is provided at the second connecting part, the bearing pressure plate pressing against the outer ring of the self-aligning roller bearing.

[0011] Preferably, the main shaft is provided with a stepped portion, which is located between the connection between the rotor and the main shaft and the connection between the deep groove ball bearing and the main shaft.

[0012] Preferably, an encoder is provided at the end of the main shaft near the brake.

[0013] Preferably, the rear end cover is flared, and the slope of the rear end cover slopes downward from one side of the base to the brake side.

[0014] The beneficial effects of this utility model are as follows: The self-aligning traction machine with a rear-mounted brake provided by this utility model optimizes the traction machine structure by installing the brake at the rear end of the machine base, improving the overall compactness and space utilization of the traction machine, and facilitating installation and maintenance. By adopting a 1:10 taper ratio main shaft to cooperate with the traction sheave, and adding an axial locking method with a main shaft cover plate, interference self-locking between the traction sheave and the main shaft is achieved, improving the safety of the connection and effectively preventing loosening or wear of the traction sheave during heavy loads or long-term operation, thus extending the service life of the traction machine. The self-aligning roller bearings are located in the inner cavity formed by the traction sheave and the machine base, maximizing the proximity of the load center to the bearing center, significantly improving bearing life and reducing bearing costs. Both the self-aligning roller bearings and the deep groove ball bearings are placed in the machine base, ensuring the concentricity of the bearing chambers, improving the operational stability of the traction machine and bearing life, and reducing the risk of abnormal noise and jamming. By setting a flared rear end cover, the deformation of the rear end cover is kept within a controllable range, ensuring the normal use of the rear brake disc and meeting the braking force requirements, thus improving the safety of elevator operation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a front view structural diagram of the present invention;

[0017] Figure 3This is a schematic diagram of the rear view structure of this utility model;

[0018] Figure 4 This is a side view of the structure of this utility model;

[0019] Figure 5 This is a cross-sectional structural schematic diagram of the present invention;

[0020] The components include: 1. base, 2. traction sheave, 3. main shaft, 4. stator winding core, 5. rotor, 6. brake, 7. self-aligning roller bearing, 8. first connecting part, 9. end, 10. main shaft cover plate, 11. second connecting part, 12. bearing pressure plate, 13. motor annular cavity, 14. deep groove ball bearing, 15. rear end cover, and 16. encoder. Detailed Implementation

[0021] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1 to 5 As shown, this utility model provides a self-aligning traction machine with a rear-mounted brake, which includes a base 1, a traction sheave 2, a main shaft 3, a stator winding core 4, a rotor 5, and a brake 6.

[0024] The traction sheave 2 is located at the front end of the base 1, and the main shaft 3 passes through the base 1 and connects to the traction sheave 2. A self-aligning roller bearing 7 is provided between the base 1 and the traction sheave 2. Furthermore, the traction sheave 2 is provided with a first connecting part 8 for connecting to the end 9 of the main shaft 3. The end 9 of the main shaft 3 and the traction sheave 2 are interference-fitted. The taper ratio of the end 9 near the main shaft 3 and the traction sheave 2 is 1:10. A main shaft cover plate 10 is provided on the end 9, and a groove is formed on the traction sheave 2 for mounting the main shaft cover plate 10 and for the main shaft cover plate 10 to fit in shape. By using the 1:10 taper ratio of the main shaft 3 to the traction sheave 2, and with the axial locking of the main shaft cover plate 10 on the end face of the main shaft 3, the traction sheave 2 and the main shaft 3 form an interference-fit self-locking mechanism, making the safety more reliable.

[0025] A self-aligning roller bearing 7 is fitted onto the first connecting part 8. A second connecting part 11, extending deep into the traction sheave 2, is provided on the base 1. The self-aligning roller bearing 7 is positioned between the second connecting part 11 and the first connecting part 8. A bearing pressure plate 12 is provided at the second connecting part 11, pressing against the outer ring of the self-aligning roller bearing 7 to prevent axial displacement. To maximize the lifespan of the self-aligning roller bearing 7, it is positioned directly below the traction sheave 2, i.e., at the location of the first connecting part 8. This achieves optimal axial dimensions and reduces material costs. The self-aligning roller bearing 8 of this invention is positioned within the cavity formed by the traction sheave 2 and the base 1. Its advantage is that the load center is maximized by maximizing the proximity of the center of the self-aligning roller bearing 8 located at the front end, thereby maximizing bearing lifespan and minimizing bearing costs.

[0026] The base 1 has a recessed cavity forming a motor annular cavity 13. Inside the motor annular cavity 13 are the stator winding core 4 and the rotor 5. The rotor 5 is located outside the stator winding core 4 and is connected to the main shaft 3. A deep groove ball bearing 14 is installed between the base 1 and the main shaft 3. A stepped portion 15 is provided on the main shaft 3, positioned between the connection point of the rotor 5 and the main shaft 3 and the connection point of the deep groove ball bearing 14 and the main shaft 3, making the axial positioning of the deep groove ball bearing 14 more stable.

[0027] Compared with the traditional structure where the rear bearing is placed on the end cover and the two bearings are not in the same part, the self-aligning roller bearing 8 at the front end and the deep groove ball bearing 14 at the rear end of this utility model are both placed on the machine base 1. This will result in better concentricity, which can maximize the concentricity of the two bearing chambers, maximize the bearing life, and reduce the risk of bearing noise and jamming.

[0028] A rear end cover 15 is provided at the rear end of the base 1, and a brake 6 is provided on one side of the rear end cover 15. The rear end cover 15 is flared in shape, and the slope of the rear end cover 15 slopes downward from one side of the base 1 to the side of the brake 6. By designing the rear end cover 15 into a flared shape, when the brake 6 is activated, both positive pressure and negative tension are applied simultaneously, ensuring that the rear end cover 15 has minimal deformation. This ensures the normal operation of the rear brake disc of the brake 6 and guarantees the braking force required by the traction machine.

[0029] An encoder 16 is provided at the end of the main shaft 3 near the brake 6. The encoder 16 does not protrude from the brake 6.

[0030] This utility model provides a self-aligning traction machine with a rear-mounted brake. By installing the brake 6 at the rear end of the base 1, the structure of the traction machine is optimized, improving its overall compactness and space utilization, and facilitating installation and maintenance. By using a 1:10 taper ratio main shaft 3 to cooperate with the traction sheave 2, and adding an axial locking mechanism with a main shaft cover plate 10, interference-locking between the traction sheave 2 and the main shaft 3 is achieved, improving connection safety and effectively preventing loosening or wear of the traction sheave 2 under heavy load or long-term operation, thus extending the service life of the traction machine. The self-aligning roller bearing 8, located within the cavity formed by the traction sheave 2 and the base 1, maximizes the proximity of the load center to the bearing center, significantly improving bearing life and reducing bearing costs. Both the self-aligning roller bearing 7 and the deep groove ball bearing 14 are placed within the base 1, ensuring the concentricity of the bearing chambers, improving the operational stability of the traction machine and bearing life, and reducing the risk of abnormal noise and jamming. By setting the horn-shaped rear end cover 15, the deformation of the rear end cover is kept within a controllable range, ensuring the normal use of the rear brake disc and the braking force requirements, and improving the safety of elevator operation.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] 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. A self-aligning traction machine with a rear-mounted brake, comprising a base, a traction sheave, a main shaft, a stator winding core, a rotor, and a brake, characterized in that: The traction sheave is located at the front end of the machine base. The main shaft passes through the machine base and is connected to the traction sheave. A self-aligning roller bearing is provided between the machine base and the traction sheave. The machine base is recessed to form a motor annular cavity. The stator winding core and the rotor are arranged inside the motor annular cavity. The rotor is located outside the stator winding core and is connected to the main shaft. A deep groove ball bearing is provided between the machine base and the main shaft. A rear end cover is provided at the rear end of the machine base, and a brake is provided on one side of the rear end cover.

2. The self-aligning traction machine with a rear-mounted brake as described in claim 1, characterized in that: The traction sheave is provided with a first connecting part that connects to the end of the main shaft. The end of the main shaft is interference-fitted with the first connecting part, and the self-aligning roller bearing is sleeved on the first connecting part.

3. The self-aligning traction machine with a rear-mounted brake as described in claim 1, characterized in that: A main shaft cover plate is provided on the end of the main shaft near the traction sheave, and a groove is provided on the traction sheave for mounting the main shaft cover plate.

4. The self-aligning traction machine with a rear-mounted brake according to claim 1, characterized in that: The taper ratio of the end of the main shaft near the traction sheave is 1:

10.

5. The self-aligning traction machine with a rear-mounted brake according to claim 2, characterized in that: The base is provided with a second connecting part that extends into the interior of the traction sheave. The self-aligning roller bearing is disposed between the second connecting part and the first connecting part. A bearing pressure plate is provided at the second connecting part, and the bearing pressure plate presses against the outer ring of the self-aligning roller bearing.

6. The self-aligning traction machine with a rear-mounted brake according to claim 1, characterized in that: The main shaft is provided with a stepped portion, which is located between the connection between the rotor and the main shaft and the connection between the deep groove ball bearing and the main shaft.

7. The self-aligning traction machine with a rear-mounted brake according to claim 1, characterized in that: An encoder is provided at the end of the main shaft near the brake.

8. The self-aligning traction machine with a rear-mounted brake according to claim 1, characterized in that: The rear end cover is flared in shape, and the slope of the rear end cover slopes downward from one side of the base to the brake side.

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