Permanent magnet synchronous traction machine

Abstract

A permanent magnet synchronous traction machine comprises a machine base, a stator iron core with a winding, a rotor assembly, a traction wheel, a bearing kit and an encoder, and the stator iron core with the winding and the rotor assembly are arranged in the machine base; the rotor assembly comprises a hub, a rotating shaft, a permanent magnet and a permanent magnet pressing plate; the permanent magnet is fixed on the inner wall of the hub through the permanent magnet pressing plate; the hub and the rotating shaft are of an integrated structure, and the rotating shaft extends from one side of the hub along the central axis of the hub. The bearing kit comprises a front bearing and a rear bearing, and the front bearing and the rear bearing are both nested on the rotating shaft and are fixedly mounted at bearing mounting positions in the machine base; and the traction wheel is fixed at the free end of the rotating shaft. Due to the fact that the hub and the rotating shaft are of the integrated structure and the size of the rear bearing installation position on the rotating shaft is the same as that of the traction wheel installation position, the machining difficulty of the main shaft can be reduced, the traction wheel directly abuts against the bearing in the assembling process, the use and installation steps of parts are reduced, the assembling efficiency can be improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a permanent magnet synchronous traction machine. Background Art

[0002] Elevator equipment has become an indispensable vertical transportation tool in people's daily work and life. As a necessary component in the elevator, the traction machine undertakes important functions. Commonly used traction machines mainly include permanent magnet synchronous traction machines. Regarding magnetic synchronous traction machines, they have the advantages of safety, stability, reliability, and durability. However, there are problems such as complex installation, multiple parts processing sizes, and high precision requirements. The most prominent of these is the processing and installation of the main shaft. The main shaft of the traditional traction machine needs to be processed separately and then fixed to the hub by bolts. This method has many main shaft processing dimensions, high precision requirements, complex assembly process, low assembly efficiency, and high cost.

[0003] With the extensive application and maintenance of elevators, the usage and maintenance rate of traction machines have also increased rapidly. Therefore, it is necessary to propose a new type of permanent magnet synchronous traction machine structure, which can simplify the assembly process, improve assembly efficiency, reduce installation and maintenance costs, and at the same time ensure that the traction machine still has the advantages of safety, stability, reliability, and durability. Utility Model Content

[0004] Based on this, the utility model provides a permanent magnet synchronous traction machine, which is characterized by an integrated design of the rotating shaft and the wheel hub, which reduces the difficulty of main shaft processing and the steps of installing the main shaft separately during installation; and the traction wheel installation position on the main shaft and the rear bearing installation position share the same size, which can not only reduce the main shaft processing size, but also the traction wheel protruding part can be used to resist the bearing to act as a retaining ring during assembly, reducing the use of parts and reducing assembly steps. The structure of the traction machine is simpler, more compact, smaller in size, and can also reduce production costs.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A permanent magnet synchronous traction machine comprises a machine base, a stator core with a winding, a rotor assembly, a traction wheel, a bearing kit and an encoder, characterized in that: the stator core with a winding and the rotor assembly are arranged in the machine base; the rotor assembly comprises a wheel hub, a rotating shaft, a permanent magnet and a permanent magnet pressure plate, and the permanent magnet is fixed to the inner wall of the wheel hub through the permanent magnet pressure plate; the wheel hub and the rotating shaft are an integrated structure, and the rotating shaft extends from one side of the wheel hub along the central axis of the wheel hub; the bearing kit comprises a front bearing and a rear bearing, and the front bearing and the rear bearing are both nested on the rotating shaft and installed in the bearing mounting position in the machine base; the traction wheel is sleeved on the rotating shaft, and the traction wheel mounting hole is consistent in size with the rear bearing hole.

[0007] Furthermore, the shaft is stepped, and the two shaft diameters correspond to the front bearing installation diameter and the rear bearing installation diameter respectively; the bearing installation positions in the machine base include the first bearing installation position and the second bearing installation position, which correspond to the installation of the front bearing and the rear bearing respectively and are respectively arranged at the front and rear of the machine base; the front bearing diameter is larger than the rear bearing, the first bearing installation position is higher than the second bearing installation position, the first bearing installation position size is larger than the rear bearing size but smaller than the front bearing size, so that the rear bearing is fixed to the left and right of the second bearing installation position end through the raised portion at the shaft step. The shaft section corresponding to the rear bearing installation diameter section also includes the installation position of the traction wheel, and the traction wheel is against the rear bearing.

[0008] Furthermore, the first bearing installation position is also provided with a bearing pressure cover, and the front bearing is fixed on the left and right sides through the bearing pressure cover and the end of the first bearing installation position.

[0009] Furthermore, the front bearing and the rear bearing are of the same size and are arranged side by side on the rotating shaft. The end of the rotating shaft, i.e., the hub, abuts against the front bearing. The bearing mounting position in the machine base is a double-row bearing mounting position, which abuts against the rear bearing. The double-row bearing mounting position is arranged in the middle of the machine base, corresponding to the middle end of the rotating shaft.

[0010] Furthermore, it also includes a rear end cover, which is arranged at the front part of the base, and the encoder is fixed by the rear end cover.

[0011] Furthermore, the middle part of the rotating shaft is hollowed out.

[0012] Furthermore, it also includes an encoder mounting seat, which is arranged inside the wheel hub and the encoder is mounted on the encoder mounting seat.

[0013] Furthermore, it also includes an axle head pressure plate, which is arranged at the front end of the rotating shaft, that is, on one side of the traction wheel, and the axle head pressure plate is pressed against the traction wheel to lock the traction wheel laterally relative to the machine base; the axle head pressure plate is provided with a small shaft, and the encoder is installed on the small shaft.

[0014] Furthermore, the encoder is mounted on the shaft head pressure plate, the shaft head pressure plate is arranged at the front end of the rotating shaft, the shaft head pressure plate has a small shaft, and the encoder is mounted on the small shaft. A tapered hole inlaid shaft can also be used, the tapered hole inlaid shaft is arranged at the intersection of the rotating shaft and the wheel hub, and the encoder is mounted on the tapered hole inlaid shaft.

[0015] Furthermore, it also includes a junction box, which is arranged on the machine base. The machine base is provided with a threading hole, and the winding stator core lead wire passes through the threading hole and is fixed in the junction box.

[0016] The beneficial effects of the utility model are:

[0017] (1) The wheel hub and the main shaft are designed as one piece, and the rear bearing mounting position and the traction sheave mounting position share the same size. During installation, the traction sheave directly rests against the bearing, reducing the use of retaining rings, and reducing the installation steps of the main shaft and retaining rings, thereby improving assembly efficiency.

[0018] (2) The use of parts is reduced, which reduces its own weight and can withstand more loads.

[0019] (3) The processing steps and difficulty of the spindle, a precision part, are reduced, and the processing efficiency and qualification rate are improved.

[0020] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of Example 1 of the utility model.

[0022] Figure 2 This is a structural diagram of Example 2 of the utility model.

[0023] Figure 3 This is a structural diagram of embodiment 3 of the present utility model.

[0024] Figure 4 This is a structural diagram of the hub and traction sheave after the bearings are installed in the utility model.

[0025] Figure 5 This is a structural diagram of the wheel hub of the present utility model.

[0026] The following are marked in the figure:

[0027] 1- Base

[0028] 11-First bearing installation position

[0029] 111-Bearing gland

[0030] 12-Second bearing installation position

[0031] 13-Double row bearing installation position

[0032] 14- Rear end cover

[0033] 2- Stator core with winding

[0034] 3-Rotor assembly

[0035] 31-Wheel Hub

[0036] 32-Shaft

[0037] 33-Permanent magnet

[0038] 34-Permanent magnet pressure plate

[0039] 4-Traction sheave

[0040] 5-Bearing Kit

[0041] 51-Front bearing

[0042] 52-Rear bearing

[0043] 6-Encoder

[0044] 61-Encoder mounting seat

[0045] 62-Axis head pressure plate

[0046] 63-Taper hole inlaid shaft

[0047] 7- Junction Box DETAILED DESCRIPTION

[0048] The following will provide a clear and complete description of the technical solutions in the three embodiments of the present invention in conjunction with the accompanying drawings.

[0049] Example 1

[0050] like Figure 1 The utility model provides a permanent magnet synchronous traction machine, including a machine base 1, a winding stator core 2, a rotor assembly 3, a traction wheel 4, a bearing kit 5 and an encoder 6. The winding stator core 2 and the rotor assembly 3 are arranged in the machine base 1. When the traction machine is running, the rotor assembly 3 rotates relative to the machine base 1 and the winding stator core 2, wherein the rotor assembly 3 includes a hub 31, a rotating shaft 32, a permanent magnet 33 and a permanent magnet pressure plate 34, and the permanent magnet is fixed to the inner wall of the hub 31 through the permanent magnet pressure plate 34; the hub 31 and the rotating shaft 32 are an integrated structure, and preferably, the rotating shaft 32 is a hollow structure, which can reduce the overall weight of the traction machine.

[0051] The utility model adopts a double bearing structure, and the bearing set 5 includes a front bearing 51 and a rear bearing 52, which are both nested on the rotating shaft 32 and fixedly installed in the bearing installation position in the machine base 1, and the traction wheel 4 is fixed to the free end of the rotating shaft 32. Specifically, the traction wheel 4 is located at the rear side of the traction machine. The shaft head pressure plate 62 is fixed to the end of the rotating shaft 32 by bolts and is located outside the traction wheel 4.

[0052] like Figure 4 and Figure 5The rotating shaft 32 is a stepped structure, and the diameters of the two sections of the rotating shaft 32 correspond to the installation diameters of the front bearing 51 and the rear bearing 52, respectively, wherein the rotating shaft section corresponding to the installation of the rear bearing 52 includes the installation position of the traction wheel 4; the bearing installation positions in the machine base 1 include the first bearing installation position 11 and the second bearing installation position 12, which correspond to the installation of the front bearing 51 and the rear bearing 52, respectively, and are respectively arranged at the front part and the rear part of the machine base 1; the diameter of the front bearing 51 is larger than that of the rear bearing 52, the first bearing installation position 11 is higher than the second bearing installation position 12, the size of the first bearing installation position 11 is larger than that of the rear axle and smaller than that of the front bearing 51, so that the rear bearing 52 is fixed to the left and right ends of the second bearing installation position 12 through the raised portion at the step of the rotating shaft 32.

[0053] When assembling the traction machine, first, the front and rear bearings 51 and 52 are inserted into the rotating shaft 32, and then the hub 31 with the assembled bearings is installed from the front side of the traction machine. The machine base 1 is preset with a raised first bearing installation position 11 and a second bearing installation position 12. After the hub 31 is installed, the front bearing 51 and the rear bearing 52 are respectively supported by the raised part of the rotating shaft 32 and the bearing installation position to achieve axial limit. Preferably, the front end of the front bearing 51 is installed with a bearing cover 111 to fix the front bearing 51 so that it will not be lateral displacement.

[0054] Then, the traction wheel 4 is inserted into the rotating shaft 32 and pressed against the rear bearing 52 to act as a retaining ring, fixing the rear bearing 52 so that it will not be laterally displaced. Subsequently, the shaft head pressure plate 62 is installed on the rotating shaft 32 by bolts to fix the traction wheel 4 so that it will not be laterally displaced.

[0055] The encoder of the present invention is arranged on an encoder mounting seat 61 , and the encoder mounting seat 61 is installed in the wheel hub 31 .

[0056] The above is the first embodiment of the present utility model.

[0057] Example 2

[0058] like Figure 2 The permanent magnet synchronous traction machine described in this embodiment also includes the machine base 1, the winding stator core 2, the rotor assembly 3, the traction wheel 4, the bearing kit 5 and the encoder 6 described in the embodiment. The winding stator core 2 and the rotor assembly 3 are arranged in the machine base 1. The rotor assembly 3 includes a hub 31, a rotating shaft 32, a permanent magnet 33 and a permanent magnet pressure plate 34. The permanent magnet is fixed to the inner wall of the hub 31 through the permanent magnet pressure plate 34; the hub 31 and the rotating shaft 32 are an integrated structure. Preferably, the rotating shaft 32 is a hollow structure, which can reduce the overall weight of the traction machine.

[0059] The difference from Example 1 is that, although a dual-bearing structure is also adopted, it is not arranged in a front-to-back distributed manner, but is arranged side by side in the middle of the traction machine. The bearing mounting position in the machine base 1 is a double-row bearing mounting position 13, and the two bearings are of the same size and are arranged side by side.

[0060] During installation, two bearings can be simultaneously inserted into the rotating shaft 32, and the bearings are supported by the stepped raised portion of the rotating shaft 32. Afterwards, the hub 31 with the bearings assembled is also installed from the front side of the traction machine. A raised bearing mounting position is preset inside the machine base 1. After the hub 31 is installed, the bearings are supported by the raised portion of the rotating shaft 32 and the bearing mounting position to achieve axial limiting.

[0061] Preferably, a rear end cover 14 is further included. The rear end cover 14 is arranged on one side of the encoder 6. The encoder 6 is fixed by the rear end cover 14 so that the encoder 6 is radially fixed.

[0062] In this embodiment, the encoder 6 is mounted on a shaft head pressure plate 62 with a small shaft, the shaft head pressure plate 62 is installed on one side of the traction wheel, the small shaft on the shaft head pressure plate 62 passes through the hollow rotating shaft, and the encoder 6 is mounted on the small shaft. When the traction machine is running, the encoder 6, the shaft head pressure plate 62 and the rotor assembly 3 rotate synchronously. The shaft head pressure plate 62 is detachable, which facilitates the encoder 6 to be directly installed or removed from the front of the traction machine.

[0063] Example 3

[0064] like Figure 3 The difference between this embodiment and embodiment 2 is that the encoder 6 is installed on the tapered hole embedded shaft 63, and the tapered hole embedded shaft 63 is installed at the intersection of the wheel hub and the rotating shaft for installing the encoder 6.

[0065] The above is a specific description of the three preferred implementation modes of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the operating procedures and principles of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A permanent magnet synchronous traction machine, comprising a machine base (1), a stator core with a winding (2), a rotor assembly (3), a traction wheel (4), a bearing set (5) and an encoder (6), characterized in that: The winding stator core (2) and the rotor assembly (3) are arranged in the machine base (1); the rotor assembly (3) comprises a wheel hub (31), a rotating shaft (32), a permanent magnet (33) and a permanent magnet pressure plate (34), and the permanent magnet is fixed to the inner wall of the wheel hub (31) through the permanent magnet pressure plate (34); the wheel hub (31) and the rotating shaft (32) are an integrated structure, and the rotating shaft (32) extends from one side of the wheel hub (31) along the central axis of the wheel hub (31); the bearing kit (5) comprises a front bearing (51) and a rear bearing (52), and the front bearing (51) and the rear bearing (52) are both nested on the rotating shaft (32) and installed in the bearing installation position in the machine base (1); the traction wheel (4) is sleeved on the rotating shaft (32), and the mounting hole of the traction wheel (4) is consistent in size with the hole of the rear bearing (52).

2. A permanent magnet synchronous traction machine according to claim 1, characterized in that: The rotating shaft (32) is stepped, and the diameters of the two sections of the rotating shaft (32) correspond to the diameters of the front bearing (51) and the rear bearing (52) respectively; the bearing mounting positions in the machine base (1) include a first bearing mounting position (11) and a second bearing mounting position (12), which correspond to the front bearing (51) and the rear bearing (52) and are respectively arranged at the front and rear of the machine base (1); the diameter of the front bearing (51) is larger than that of the rear bearing (52), the first bearing mounting position (11) is higher than that of the second bearing mounting position (12), the size of the first bearing mounting position (11) is larger than that of the rear bearing (52) but smaller than that of the front bearing (51), so that the rear bearing (52) is fixed to the left and right of the end of the second bearing mounting position (12) through the raised portion at the step of the rotating shaft (32); the shaft section of the rotating shaft (32) corresponding to the mounting diameter section of the rear bearing (52) also includes a mounting position of the traction wheel (4), and the traction wheel (4) abuts against the rear bearing (52).

3. A permanent magnet synchronous traction machine according to claim 2, characterized in that: The first bearing installation position (11) is also provided with a bearing pressure cover (111), and the front bearing (51) is fixed to the left and right sides through the bearing pressure cover (111) and the end of the first bearing installation position (11).

4. A permanent magnet synchronous traction machine according to claim 1, characterized in that: The front bearing (51) and the rear bearing (52) are of the same size and are sleeved side by side on the rotating shaft (32). The end of the rotating shaft (32), i.e., the hub, abuts against the front bearing (51). The bearing mounting position in the machine base (1) is a double-row bearing mounting position (13). The double-row bearing mounting position (13) abuts against the rear bearing (52). The double-row bearing mounting position (13) is arranged in the middle of the machine base (1) and is correspondingly arranged in the middle end of the rotating shaft (32).

5. A permanent magnet synchronous traction machine according to claim 4, characterized in that: It also includes a rear end cover (14), which is arranged at the front of the machine base (1), and the encoder (6) is fixed by the rear end cover (14).

6. A permanent magnet synchronous traction machine according to claim 1, characterized in that: The middle part of the rotating shaft (32) is hollowed out.

7. A permanent magnet synchronous traction machine according to claim 2, characterized in that: It also includes an encoder mounting seat (61), wherein the encoder mounting seat (61) is arranged inside the wheel hub (31), and the encoder (6) is mounted on the encoder mounting seat (61).

8. A permanent magnet synchronous traction machine according to claim 4, characterized in that: The machine also comprises an axle head pressure plate (62), which is arranged at the front end of the rotating shaft (32), that is, on one side of the traction wheel (4), and the axle head pressure plate (62) is pressed against the traction wheel (4) so ​​that the traction wheel (4) is laterally locked relative to the machine base (1); the axle head pressure plate (62) is provided with a small shaft, and the encoder (6) is installed on the small shaft.

9. A permanent magnet synchronous traction machine according to claim 4, characterized in that: It also comprises a tapered hole inlaid shaft (63), wherein the tapered hole inlaid shaft (63) is arranged at the junction of the rotating shaft and the wheel hub, and the encoder (6) is mounted on the tapered hole inlaid shaft (63).

10. The permanent magnet synchronous traction machine according to claim 1, characterized in that: It also includes a junction box (7), which is arranged on the machine base (1). The machine base (1) is provided with a threading hole, and the lead wire of the winding stator core (2) passes through the threading hole and is fixed in the junction box (7).

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