Traction machine with long service life

Abstract

The utility model discloses a traction machine with long service life, which comprises a machine base (1), a stator core (2), a rotor shaft (3) and a traction wheel (4), two sides of the rotor shaft (3) are rotatably connected with the machine base (1), the middle of the rotor shaft (3) is connected with the traction wheel (4), a rotor magnet yoke (401) is arranged outside the traction wheel (4), and the rotor magnet yoke (401) and the traction wheel (4) are integrally formed. According to the utility model, the traction wheel is arranged in the middle of the rotor shaft, so that the connection positions at the two ends of the rotor shaft are uniformly stressed, the working stability of the traction wheel is improved, and the required length of the rotor shaft is shortened; the rotor magnet yoke and the traction wheel are integrally formed, so that a connecting piece structure in an original traction machine can be omitted, the machining difficulty of equipment is reduced, and the torque transmission stability of the traction machine is improved.

Description

Technical Field

[0001] The utility model relates to a traction machine, in particular to a traction machine with a long service life. Background Art

[0002] The current traction machine is mainly composed of a machine base, a stator, a rotor and a traction wheel, wherein the stator core is fixed in the chamber of the machine base, the rotor yoke and the magnetic steel sleeve are arranged outside the stator and connected to the rotor shaft located in the middle of the machine base; at the same time, the middle part of the rotor shaft is connected to the machine base through a bearing for positioning, one end of the rotor shaft extends to the outside of the machine base and is connected to the traction wheel, and the rotor shaft and the traction wheel are driven by the rotor in turn to rotate during operation. However, since the traction wheel of this traction machine is installed at the end position of the rotor shaft, the rotor shaft will be subjected to radial pressure from the end during operation, resulting in uneven force on the rotor shaft, which seriously increases the pressure on the machine base caused by the rotor shaft near the traction wheel side. This connection position not only requires a large-sized load-bearing bearing to improve the connection stability, thereby increasing the equipment cost; and the machine base also needs to be adjusted in size at this connection position and set up with a variety of reinforcement structures, resulting in an increase in the overall size of the traction machine and an increase in design difficulty.

[0003] On the other hand, since the rotor shaft needs to extend to the outside of the machine base and connect to the traction wheel, the overall length of the rotor shaft will also increase, which will not only further increase the stress on the machine base at the connection position, but also increase the processing cost and difficulty of the rotor shaft accordingly, further increasing the equipment cost.

[0004] In addition, the existing rotor yoke and traction wheel are both split structures, and need to be connected through a bolt + pin structure, or indirectly connected through the rotor shaft to transmit torque; and this connection structure not only has high requirements on the position accuracy of the connecting hole, but also has the risk of crushing the bolts, pins or connecting keys, reducing the working stability and service life of the traction machine.

[0005] Therefore, the existing traction machines have the problems of high equipment cost, low working stability and short service life. Utility Model Content

[0006] The utility model aims to provide a traction machine with a long service life, which has the characteristics of low equipment cost, high working stability and long service life.

[0007] The technical solution of the utility model is a traction machine with a long service life, comprising a machine base, a stator core, a rotor shaft and a traction wheel, wherein two sides of the rotor shaft are rotatably connected to the machine base, the middle part of the rotor shaft is connected to the traction wheel, a rotor yoke is arranged on the outside of the traction wheel, and the rotor yoke and the traction wheel are integrally formed.

[0008] In the aforementioned long-service-life traction machine, an annular core chamber is provided on one side of the machine base, and the cross-sectional shape of the core chamber is U-shaped. The stator core is sleeved on the inner ring of the core chamber, and a magnetic steel is provided on the outside of the stator core, and the outside of the magnetic steel is connected to the rotor yoke.

[0009] In the aforementioned long-service-life traction machine, the traction wheel includes an inner ring body and an outer ring body connected to each other in an I-shape, the outer ring body extends into the machine base outside the core chamber, one side of the outer ring body is connected to the rotor yoke, the rotor yoke extends into the core chamber and is arranged concentrically with the stator core.

[0010] In the aforementioned traction machine with a long service life, one end of the machine base passes through the traction wheel and is connected to an end cover, the inner side of the end cover is rotatably connected to the rotor shaft, and the machine base and the end cover are buckled with each other.

[0011] In the aforementioned traction machine with a long service life, one end of the rotor shaft is respectively connected to an encoder and a brake, and the inner side of the brake is connected to an end cover.

[0012] In the aforementioned traction machine with a long service life, a junction box is connected to the end of the machine base away from the brake.

[0013] Compared with the prior art, the utility model has the following characteristics:

[0014] (1) The utility model arranges the traction wheel between the two side connections of the rotor shaft and the machine base, so that the load caused by the traction wheel on the rotor shaft can be borne by the machine bases on both sides and the force is evenly applied, thereby effectively avoiding the uneven force and the risk of the traction machine rolling over caused by the force on one side, and improving the working stability of the utility model; and after the two side connections are evenly applied, the size and thickness of the machine base and the bearing model at the connection position can be reduced accordingly, thereby reducing the overall appearance and equipment cost of the traction machine;

[0015] (2) By arranging the traction sheave in the middle of the rotor shaft, the length of the rotor shaft can be effectively shortened compared with the existing side-mounted installation structure, thereby reducing the difficulty of machining the rotor shaft and reducing its raw material and machining costs;

[0016] (3) On the basis of the central placement of the traction wheel, the traction wheel and the rotor yoke are integrally formed, which can effectively avoid the direct or indirect connection parts between the two compared with the existing structure, so that the rotor yoke can transmit torque more stably, reduce the installation of bolts, pins and other connecting parts, and do not need to worry about the risk of crushing the connecting parts, further improve the working stability and service life of the utility model, and correspondingly reduce the processing of the connecting holes, thereby reducing the process cost of the utility model;

[0017] (4) By connecting one end of the machine base to the rotor shaft through the end cover, not only can the difficulty of installing the traction wheel be reduced, but the end cover can also bear the load of the rotor shaft instead of the machine base, thereby improving the support stability of the rotor shaft and reducing the difficulty of machining the machine base and reducing its machining cost;

[0018] Therefore, the utility model has the characteristics of low equipment cost, high working stability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] The markings in the accompanying drawings are: 1-base, 2-stator core, 3-rotor shaft, 4-traction wheel, 5-magnetic steel, 6-end cover, 7-encoder, 8-brake, 9-junction box, 101-core chamber, 401-rotor yoke, 402-inner ring body, 403-outer ring body. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0022] Embodiment. A traction machine with a long service life is composed of Figure 1 As shown, it includes a machine base 1, a stator core 2, a rotor shaft 3 and a traction wheel 4, wherein the stator core 2 is a stator core with windings, both sides of the rotor shaft 3 are rotatably connected to the machine base 1 via bearings, the middle of the rotor shaft 3 is connected to the traction wheel 4, the outer upper end of the traction wheel 4 extends into the machine base 1 and is provided with a rotor yoke 401, and the rotor yoke 401 is integrally formed with the traction wheel 4.

[0023] A ring-shaped core chamber 101 is provided on one side of the base 1, and the cross-sectional shape of the core chamber 101 is U-shaped. The stator core 2 is sleeved on the inner ring of the core chamber 101, and a magnetic steel 5 is provided on the outside of the stator core 2, and the outside of the magnetic steel 5 is connected to the rotor yoke 401.

[0024] The traction wheel 4 includes an inner ring body 402 and an outer ring body 403 which are connected to each other in an I-shape. The outer ring body 403 extends into the base 1 outside the core chamber 101. One side of the outer ring body 403 is connected to the rotor yoke 401. The rotor yoke 401 extends into the core chamber 101 and is arranged concentrically with the stator core 2.

[0025] One end of the machine base 1 passes through the traction wheel 4 and is connected to the end cover 6. The inner side of the end cover 6 is rotatably connected to the rotor shaft 3 through a bearing on one side. The machine base 1 and the end cover 6 are buckled with each other.

[0026] One end of the rotor shaft 3 is connected to an encoder 7 and a brake 8 respectively, and the inner side of the brake 8 is connected to the end cover 6 .

[0027] The base 1 is connected to a junction box 9 at one end away from the brake 8 .

[0028] Working principle of the utility model: The utility model sets the traction wheel 4 in the middle of the rotor shaft 3, and connects one end of the rotor shaft 3 to the machine base 1 through a bearing, and the other end is connected to the machine base 1 through a bearing and an end cover 6 in sequence, so that the two bearing connections of the rotor shaft 3 can be symmetrically arranged on the left and right sides of the traction wheel 4, so that the load force applied by the traction wheel 4 to the rotor shaft 3 can be evenly distributed on the bearings on both sides, effectively improving the load-bearing stability of the machine base 1 on the rotor shaft 3, and reducing the risk of rollover and cracking of the machine base 1 due to unilateral force. After the traction wheel 4 is set in the middle of the rotor shaft 3, the extension distance of the rotor shaft 3 can be effectively shortened compared with the existing side-mounted structure, thereby reducing the processing difficulty and cost of the rotor shaft 3.

[0029] By integrally forming the traction wheel 4 and the rotor yoke 401, the connection stability can be improved compared to the existing split structure. On the one hand, the processing cost of the mounting hole is avoided, and on the other hand, the risk of crushing of the connecting parts can be prevented, further improving the working stability and service life of the utility model.

[0030] When the utility model is in use, the rotor yoke 401 rotates under the cooperation of the magnetic steel 5 and the stator core 2, and the traction wheel 4 rotates with the rotor yoke 401 to drive the rotor shaft 3 to rotate, thereby achieving the effect of traction drive.

Claims

1. A traction machine with a long service life, comprising a machine base (1), a stator core (2), a rotor shaft (3) and a traction sheave (4), characterized in that: The two sides of the rotor shaft (3) are rotatably connected to the machine base (1), the middle of the rotor shaft (3) is connected to the traction wheel (4), the outside of the traction wheel (4) is provided with a rotor yoke (401), and the rotor yoke (401) and the traction wheel (4) are integrally formed.

2. A traction machine with a long service life according to claim 1, characterized in that: An annular core chamber (101) is provided on one side of the machine base (1), the cross-sectional shape of the core chamber (101) is U-shaped, the stator core (2) is sleeved on the inner ring of the core chamber (101), a magnetic steel (5) is provided on the outside of the stator core (2), and the outside of the magnetic steel (5) is connected to a rotor yoke (401).

3. A traction machine with a long service life according to claim 2, characterized in that: The traction wheel (4) comprises an inner ring body (402) and an outer ring body (403) connected to each other in an I-shape, the outer ring body (403) extending into the machine base (1) outside the core chamber (101), one side of the outer ring body (403) connected to the rotor yoke (401), the rotor yoke (401) extending into the core chamber (101) and arranged concentrically with the stator core (2).

4. A traction machine with a long service life according to claim 1, characterized in that: One end of the machine base (1) passes through the traction wheel (4) and is connected to an end cover (6); the inner side of the end cover (6) is rotatably connected to the rotor shaft (3); the machine base (1) and the end cover (6) are interlocked.

5. A traction machine with a long service life according to claim 4, characterized in that: One end of the rotor shaft (3) is respectively connected to an encoder (7) and a brake (8), and the inner side of the brake (8) is connected to an end cover (6).

6. A traction machine with a long service life according to claim 5, characterized in that: The base (1) is connected to a junction box (9) at one end away from the brake (8).

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