Semi-direct-drive permanent magnet traction machine
The semi-direct drive permanent magnet traction machine with integrated design combines the traction sheave and brake sheave together and adopts a planetary reduction assembly, which solves the problems of large space occupation and low reliability of traditional traction machines, and achieves compact and efficient installation and maintenance.
Patent Information
- Application Number
- CN202520142145.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In traditional traction machines, the traction sheave and brake disc are set up independently, which leads to problems such as large space occupation, complex structure, high installation difficulty and low reliability.
The semi-direct drive permanent magnet traction machine design integrates the traction wheel and brake wheel, with the planetary reduction assembly integrated on the inner circumferential wall of the traction wheel and the brake wheel vertically mounted on the outer circumferential wall of the traction wheel, reducing connecting parts and assembly steps.
It improves structural compactness and reliability, reduces installation difficulty and cost, enhances installation accuracy, and reduces potential failure points.
Smart Images
Figure CN223892337U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a semi-direct drive permanent magnet traction machine, belonging to the field of traction machine technology. Background Technology
[0002] In traditional traction machines, the traction sheave and brake disc are typically two separate components, often installed in parallel. This layout results in the traction machine occupying a significant amount of space in the axial direction. For example, in common commercial elevator traction machines, the overall length often exceeds the ideal range for actual installation space due to the parallel arrangement of the traction sheave and brake disc. This makes installation extremely difficult, or even impossible, in some space-constrained building scenarios, such as retrofitting elevators in older buildings or small commercial buildings. From a mechanical structural compactness perspective, the separate traction sheave and brake disc design adds unnecessary structural complexity. Numerous connecting parts and mounting components not only increase the number of parts and manufacturing and assembly costs but also introduce more potential failure points due to the complex structure, reducing system reliability. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a semi-direct drive permanent magnet traction machine.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a semi-direct drive permanent magnet traction machine, comprising a frame, a motor, a front support, a traction sheave, and multiple brakes; one side of the frame has a receiving cavity, the motor is installed in the receiving cavity, the front support is connected and fixed to the other side of the frame, and the traction sheave is located between the motor and the front support;
[0005] A planetary reduction assembly is provided on the inner peripheral wall of the traction sheave. The motor is used to drive the planetary reduction assembly, which is used to drive the traction sheave to rotate. A drive shaft is provided on the side of the planetary reduction assembly away from the motor, and the drive shaft is rotatably engaged with the front bracket.
[0006] A brake wheel is provided on the outer peripheral wall of the traction sheave near the motor. The brake wheel is integrally formed with the traction sheave and is perpendicular to the outer peripheral wall of the traction sheave. Multiple brakes are fixed on the frame and are used to brake the brake wheel.
[0007] Preferably, the planetary reduction assembly includes a reduction gearbox, a ring gear, a planet carrier, a sun gear, and multiple planetary gears; the ring gear is connected and fixed to the inner wall of the reduction gearbox; both sides of the planet carrier are rotatably engaged with the reduction gearbox; the multiple planetary gears are rotatably mounted on the planet carrier; the sun gear is located between the multiple planetary gears; each planetary gear meshes with the sun gear and the ring gear; both sides of the sun gear have sun gear shafts, and both sun gear shafts on both sides of the sun gear are rotatably engaged with the planet carrier; the motor has an output shaft; the sun gear shaft on the side of the sun gear closest to the motor is connected and fixed to the output shaft; the drive shaft is connected and fixed to the reduction gearbox.
[0008] Preferably, a first bearing is provided between the frame and the output shaft of the motor, and the frame and the output shaft of the motor are rotatably engaged through the first bearing.
[0009] Preferably, a second bearing is provided on the front bracket, and the drive shaft is rotatably engaged with the front bracket through the second bearing. An inner bearing cover is provided on the inner side of the second bearing, and the inner bearing cover is fixed on the front bracket. The drive shaft passes through the center of the inner bearing cover, and the drive shaft does not contact the inner bearing cover. An outer bearing cover is provided on the outer side of the second bearing, and the outer bearing cover is fixed on the front bracket.
[0010] Preferably, the outer side of the front bracket is integrally formed with multiple reinforcing ribs.
[0011] Preferably, the frame is provided with an arc-shaped mounting part that matches the shape of the brake wheel, and multiple brakes are fixed on the mounting part of the frame, with the brakes located on both sides of the mounting part being symmetrically arranged.
[0012] Preferably, an end cover is provided on the outer side of the motor, and the end cover is connected and fixed to the frame; a turning gear ring is provided on the output shaft of the motor, and the turning gear ring is interference-fitted with the output shaft of the motor; a turning shaft is rotatably provided on the end cover, one end of the turning shaft is engaged with the turning gear ring, the other end extends outside the end cover, and a turning handwheel is fixedly provided on the end of the turning shaft extending outside the end cover.
[0013] Preferably, an encoder is provided at the center of the end cover, and the encoder is engaged with the output shaft of the motor.
[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0015] This utility model discloses a semi-direct drive permanent magnet traction machine. By integrating the traction wheel and brake wheel into a single design, it avoids the relative displacement of the traction wheel and brake wheel caused by loosening and wear of connecting parts in traditional split structures. This not only improves structural reliability but also makes the structure more compact. At the same time, the integrated structure reduces assembly steps and improves installation accuracy. In addition, by changing the traditional axially arranged brake wheel to a vertical arrangement on the traction wheel, the axial space of the traction wheel is reduced, making the overall structure more compact. Attached Figure Description
[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings:
[0017] Appendix Figure 1 This is a schematic diagram of the structure of a semi-direct drive permanent magnet traction machine according to the present invention;
[0018] Appendix Figure 2 This is a structural schematic diagram from another perspective of the semi-direct drive permanent magnet traction machine described in this utility model;
[0019] Appendix Figure 3 This is a cross-sectional view of a semi-direct drive permanent magnet traction machine according to the present invention;
[0020] Appendix Figure 4 This is a cross-sectional view of the planetary reduction assembly described in this utility model.
[0021] In the diagram: 1. Frame; 11. Receiving cavity; 12. Mounting part; 2. Motor; 21. Output shaft; 211. Rotary gear ring; 22. End cover; 221. Rotary small shaft; 2211. Rotary handwheel; 222. Encoder; 3. Front bracket; 31. Second bearing; 32. Inner bearing cover; 33. Outer bearing cover; 34. Reinforcing rib; 4. Traction sheave; 41. Brake wheel; 5. Brake; 6. Planetary reduction assembly; 61. Gearbox; 62. Gear ring; 63. Planetary carrier; 64. Sun gear; 641. Sun gear shaft; 65. Planetary gear; 7. Drive shaft; 8. First bearing. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0023] As attached Figure 1-3 As shown, the semi-direct drive permanent magnet traction machine of this utility model includes a frame 1, a motor 2, a front support 3, a traction wheel 4, and multiple brakes 5.
[0024] The frame 1 has a receiving cavity 11 on one side, the motor 2 is installed in the receiving cavity 11, the front bracket 3 is connected and fixed on the other side of the frame 1, and the traction wheel 4 is located between the motor 2 and the front bracket 3. By installing the motor 2 in the receiving cavity 11 of the frame 1, the motor 2 and the frame 1 are integrated, effectively reducing the length of the whole machine.
[0025] A planetary reduction assembly 6 is provided on the inner peripheral wall of the traction sheave 4. The motor 2 drives the planetary reduction assembly 6, which in turn drives the traction sheave 4 to rotate. Specifically, the planetary reduction assembly 6 includes a reduction gearbox 61, a ring gear 62, a planet carrier 63, a sun gear 64, and multiple planetary gears 65. The ring gear 62 is fixed to the inner wall of the reduction gearbox 61. Both sides of the planet carrier 63 are rotatably engaged with the reduction gearbox 61. The multiple planetary gears 65 are rotatably mounted on the planet carrier 63, and the sun gear 64 is located on the planetary gears. Between the planetary gears 65, each planetary gear 65 meshes with the sun gear 64 and the ring gear 62. The sun gear 64 has a sun gear shaft 641 on both sides, and the sun gear shafts 641 on both sides of the sun gear 64 are rotatably engaged with the planetary carrier 63. The motor 2 has an output shaft 21, and the sun gear shaft 641 on the side of the sun gear 64 closest to the motor 2 is connected and fixed to the output shaft 21. Furthermore, a first bearing 8 is provided between the frame 1 and the output shaft 21 of the motor 2, and the frame 1 and the output shaft 21 of the motor 2 are rotatably engaged through the first bearing 8.
[0026] During operation, the drive shaft 7 of motor 2 rotates, driving the sun gear shaft 641 and the sun gear 64 to rotate. The rotation of the sun gear 64 drives multiple planetary gears 65 to rotate, and the rotation of the multiple planetary gears 65 drives the gear ring 62 to rotate. Since the gear ring 62 is fixed on the inner wall of the gearbox 61, the gear ring 62 drives the gearbox 61 to rotate. When the gearbox 61 rotates, it drives the traction sheave 4 to rotate, thus completing the process of motor 2 driving planetary reduction assembly 6, and planetary reduction assembly 6 driving traction machine.
[0027] As attached Figure 4 As shown, in this embodiment, both sides of the planetary carrier 63 are rotatably engaged with the gearbox 61 via bearings, and the sun gear shafts 641 on both sides of the sun gear 64 are rotatably engaged with the planetary carrier 63 via bearings.
[0028] The planetary reduction assembly 6 is fixedly installed on the inner circumferential wall of the traction sheave 4. If the planetary reduction assembly 6 or the traction sheave 4 is damaged, it can be directly replaced as a whole for easy maintenance and replacement later.
[0029] A drive shaft 7 is provided on the side of the planetary reduction assembly 6 away from the motor 2. The drive shaft 7 is rotatably engaged with the front bracket 3. Specifically, the drive shaft 7 is connected and fixed to the reduction gearbox 61. A second bearing 31 is provided on the front bracket 3. The drive shaft 7 and the front bracket 3 are rotatably engaged through the second bearing 31, thereby realizing the support of the front bracket 3 for the traction sheave 4 and ensuring the operational stability of the traction sheave 4 and the planetary reduction assembly 6 on its inner wall.
[0030] In a preferred embodiment, an inner bearing cover 32 is provided on the inner side of the second bearing 31. The inner bearing cover 32 is fixed on the front bracket 3. The drive shaft 7 passes through the center of the inner bearing cover 32 and does not contact the inner bearing cover 32. An outer bearing cover 33 is provided on the outer side of the second bearing 31 and is fixed on the front bracket 3. By providing the inner bearing cover 32 and the outer bearing cover 33 on both sides of the second bearing 31, external dust or debris can be prevented from entering the second bearing 31 so as not to affect the operation of the second bearing 31.
[0031] Furthermore, the outer side of the front bracket 3 is integrally formed with multiple reinforcing ribs 34, thereby improving the structural strength of the front bracket 3 and giving it a better support effect.
[0032] A brake wheel 41 is provided on the outer peripheral wall of the traction sheave 4 near the motor 2. The brake wheel 41 is integrally formed with the traction sheave 4 and is perpendicular to the outer peripheral wall of the traction sheave 4. Multiple brakes 5 are fixed on the frame 1 and are used to brake the brake wheel 41.
[0033] First, the integrated design of the traction sheave 4 and brake sheave 41 avoids the relative displacement of the traction sheave 4 and brake sheave 41 caused by loosening and wear of connecting parts in traditional split structures, which improves structural reliability and makes the structure more compact. At the same time, the integrated molding reduces assembly steps and improves installation accuracy. In addition, changing the traditional axially arranged brake sheave 41 to be vertically set on the traction sheave 4 reduces the axial space of the traction sheave 4, making the overall structure more compact.
[0034] Specifically, the frame 1 is provided with an arc-shaped mounting part 12 that matches the shape of the brake wheel 41. Multiple brakes 5 are fixed on the mounting part 12 of the frame 1, and the brakes 5 located on both sides of the mounting part 12 are symmetrically arranged. In this embodiment, multiple brakes 5 are horseshoe brakes.
[0035] In this embodiment, the number of brakes 5 is set to four, with two on each side of the mounting part 12 and symmetrical in pairs, thereby effectively ensuring the braking stability of the brakes 5. Of course, in actual use, the number of brakes 5 can be determined according to actual needs, and is not limited here.
[0036] As attached Figure 3As shown, an end cover 22 is provided on the outside of the motor 2, and the end cover 22 is connected and fixed on the frame 1; a turning gear ring 211 is provided on the output shaft 21 of the motor 2, and the turning gear ring 211 is interference-fitted with the output shaft 21 of the motor 2; a turning shaft 221 is rotatably provided on the end cover 22, wherein the turning shaft 221 can be rotatably fitted with the end cover 22 through a bearing structure; one end of the turning shaft 221 is fitted with the turning gear ring 211, and the other end extends outside the end cover 22; and a turning handwheel 2211 is fixedly provided on the end of the turning shaft 221 that extends outside the end cover 22.
[0037] An encoder 222 is provided at the center of the end cover 22, and the encoder 222 is engaged with the output shaft 21 of the motor 2.
[0038] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model; all technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of this utility model.
Claims
1. A semi-direct drive permanent magnet traction machine, characterized in that: It includes a frame (1), a motor (2), a front support (3), a traction sheave (4), and multiple brakes (5); one side of the frame (1) has a receiving cavity (11), the motor (2) is installed in the receiving cavity (11), the front support (3) is connected and fixed to the other side of the frame (1), and the traction sheave (4) is located between the motor (2) and the front support (3); A planetary reduction assembly (6) is provided on the inner peripheral wall of the traction wheel (4). The motor (2) is used to drive the planetary reduction assembly (6). The planetary reduction assembly (6) is used to drive the traction wheel (4) to rotate. A drive shaft (7) is provided on the side of the planetary reduction assembly (6) away from the motor (2). The drive shaft (7) is rotatably engaged with the front bracket (3). A brake wheel (41) is provided on the outer peripheral wall of the traction sheave (4) near the motor (2). The brake wheel (41) is integrally formed with the traction sheave (4) and the brake wheel (41) is perpendicular to the outer peripheral wall of the traction sheave (4). Multiple brakes (5) are fixed on the frame (1) and multiple brakes (5) are used to brake the brake wheel (41).
2. The semi-direct drive permanent magnet traction machine according to claim 1, characterized in that: The planetary reduction assembly (6) includes a reduction gearbox (61), a ring gear (62), a planet carrier (63), a sun gear (64), and multiple planetary gears (65); the ring gear (62) is fixed to the inner wall of the reduction gearbox (61), both sides of the planet carrier (63) are rotatably engaged with the reduction gearbox (61), the multiple planetary gears (65) are rotatably mounted on the planet carrier (63), and the sun gear (64) is located between the multiple planetary gears (65). Each planetary gear (65) 65) Both mesh with the sun gear (64) and the ring gear (62). The sun gear (64) has a sun gear shaft (641) on both sides, and the sun gear shafts (641) on both sides of the sun gear (64) are rotatably engaged with the planet carrier (63). The motor (2) has an output shaft (21). The sun gear shaft (641) of the sun gear (64) near the motor (2) is connected and fixed to the output shaft (21). The drive shaft (7) is connected and fixed to the gearbox (61).
3. A semi-direct drive permanent magnet traction machine according to claim 2, characterized in that: A first bearing (8) is provided between the frame (1) and the output shaft (21) of the motor (2), and the frame (1) and the output shaft (21) of the motor (2) are rotatably connected through the first bearing (8).
4. A semi-direct drive permanent magnet traction machine according to claim 1, characterized in that: The front bracket (3) is provided with a second bearing (31), and the drive shaft (7) is rotatably engaged with the front bracket (3) through the second bearing (31). The inner side of the second bearing (31) is provided with a bearing inner cover (32), which is fixed on the front bracket (3). The drive shaft (7) passes through the center of the bearing inner cover (32) and does not contact the bearing inner cover (32). The outer side of the second bearing (31) is provided with a bearing outer cover (33), which is fixed on the front bracket (3).
5. A semi-direct drive permanent magnet traction machine according to claim 4, characterized in that: The outer side of the front bracket (3) is integrally formed with multiple reinforcing ribs (34).
6. A semi-direct drive permanent magnet traction machine according to claim 1, characterized in that: The frame (1) is provided with an arc-shaped mounting part (12) that matches the shape of the brake wheel (41). Multiple brakes (5) are fixed on the mounting part (12) of the frame (1), and the brakes (5) located on both sides of the mounting part (12) are symmetrically arranged.
7. A semi-direct drive permanent magnet traction machine according to claim 2, characterized in that: An end cover (22) is provided on the outside of the motor (2), and the end cover (22) is connected and fixed on the frame (1); a turning gear ring (211) is provided on the output shaft (21) of the motor (2), and the turning gear ring (211) is interference-fitted with the output shaft (21) of the motor (2); a turning shaft (221) is rotatably provided on the end cover (22), one end of the turning shaft (221) is engaged with the turning gear ring (211), and the other end extends to the outside of the end cover (22), and a turning handwheel (2211) is fixedly provided on the end of the turning shaft (221) extending out of the end cover (22).
8. A semi-direct drive permanent magnet traction machine according to claim 7, characterized in that: An encoder (222) is provided at the center of the end cover (22), and the encoder (222) is engaged with the output shaft (21) of the motor (2).