Low-speed heavy-load traction machine

Abstract

The invention discloses a low-speed heavy-load traction machine which comprises a machine base, the machine base comprises a first containing cavity and a second containing cavity, a stator and a rotor are arranged in the first containing cavity, a traction wheel is arranged in the second containing cavity, and a main shaft penetrates through the first containing cavity and the second containing cavity and is connected with the rotor and the traction wheel. The first bearing, the second bearing and the third bearing are arranged on the main shaft in a sleeving mode, the two ends of the main shaft extend out of the machine base, and the two ends of the main shaft are connected with brakes. The two brakes are adopted, so that the braking force is enhanced, and the safety performance of the elevator is improved; the machine base is designed to be of an integral structure, the traction wheel is located in the middle, the two ends of the bearing are used for supporting, stress optimization is facilitated, the traction machine is more stable and reliable when bearing large loads, the integral stability of the traction machine is improved, and the service life of the traction machine is prolonged. And by adopting an end cover mounting mode, the brake is more convenient and faster to mount and maintain.

Description

Technical Field

[0001] The present invention relates to the field of traction machines, and in particular to a low-speed and high-load traction machine. Background Art

[0002] In the elevator system, the traction machine is the core component that drives the elevator car up and down, and its performance is directly related to the elevator's operating efficiency and overall safety. In the traditional traction machine design, the asynchronous motor is usually combined with a helical gear or worm gear reducer. Although it meets the basic operating requirements of the elevator to a certain extent, it has many shortcomings: the brake acts on the motor side, the noise is relatively loud, the gearbox oil change is troublesome, and there is a risk of oil leakage; the traction machine has the risk of broken shafts, which can easily cause elevator failures or even safety accidents. Summary of the invention

[0003] The object of the present invention is to provide a low-speed, high-load traction machine that can solve the above-mentioned problems.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A low-speed, high-load traction machine comprises a machine base, the machine base comprises a first receiving chamber and a second receiving chamber, a stator connected to the inner wall of the machine base and a rotor arranged in the stator are arranged in the first receiving chamber, a traction wheel is arranged in the second receiving chamber, a rotatable main shaft passes through the first receiving chamber and the second receiving chamber and is connected to the rotor and the traction wheel, a bearing chamber is arranged on the machine base, a first bearing, a second bearing and a third bearing are arranged in the bearing chamber, the first bearing, the second bearing and the third bearing are all sleeved on the main shaft, both ends of the main shaft extend out of the machine base, and both ends of the main shaft are connected to brakes.

[0006] Preferably, end covers are provided on both sides of the machine base, the end covers are sleeved on the main shaft and connected to the machine base, and the brake is provided on the outer side of the end covers and connected to the end covers.

[0007] Preferably, an encoder is provided on the end face of the spindle.

[0008] Preferably, the first bearing is a deep groove ball bearing, which is arranged on a side close to the rotor, and the second bearing and the third bearing are spherical roller bearings, which are respectively arranged on both sides of the traction wheel.

[0009] Preferably, the main shaft includes a first step portion and a second step portion, the diameter of the first step portion is greater than the diameter of the second step portion, the first bearing and the second bearing are arranged on the first step portion, and the third bearing is arranged on the second step portion.

[0010] Preferably, both ends of the main shaft are provided with splines for connecting with the brake.

[0011] The beneficial effects of the present invention are as follows: the present invention adopts two sets of brakes located at the two ends of the machine base, thereby enhancing the braking force and improving the safety performance of the elevator; the machine base adopts an integral structural design, the traction wheel is located in the middle, and is supported at both ends of the bearing, which is convenient for optimizing the force, making the traction machine more stable and reliable when bearing a large load, and improving the overall stability and service life of the traction machine; by adopting the installation method of the end cover, the installation and maintenance of the brake are more convenient and quick. The main shaft adopts a two-end spline fit, which is convenient for the installation and connection of the brake and improves the connection strength between the brake and the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0014] Among them: base 1, first accommodating chamber 2, second accommodating chamber 3, stator 4, rotor 5, traction wheel 6, main shaft 7, first bearing 8, second bearing 9, third bearing 10, brake 11, end cover 12, encoder 13, first step portion 14, second step portion 15. DETAILED DESCRIPTION

[0015] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0016] In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] like Figure 1 to Figure 2As shown, the present invention provides a low-speed and large-load traction machine, which includes an integrally formed machine base 1, and the machine base 1 includes a first receiving chamber 2 and a second receiving chamber 3. A stator 4 connected to the inner wall of the machine base 1 and a rotor 5 arranged in the stator 4 are arranged in the first receiving chamber 2. A traction sheave 6 is arranged in the second receiving chamber 2, which is used to connect with the elevator car or the counterweight device to realize the lifting and lowering of the elevator. A rotatable main shaft 7 passes through the first receiving chamber 2 and the second receiving chamber 3 and is connected to the rotor 5 and the traction sheave 6. A bearing chamber is arranged on the machine base 1, and a first bearing 8, a second bearing 9 and a third bearing 10 are arranged in the bearing chamber. The first bearing 8, the second bearing 9 and the third bearing 10 are coaxially arranged and are all sleeved on the main shaft 7. Both ends of the main shaft 7 extend out of the machine base 1, and both ends of the main shaft 7 are connected to brakes 11 to brake the traction machine. The two sets of brakes 11 enable the traction machine to have a stronger braking force and a more stable braking effect when braking, ensuring the safe operation of the elevator.

[0018] Furthermore, both sides of the base 1 are provided with end covers 12, which are sleeved on the main shaft 7 and connected to the base 1, and the brake 11 is provided on the outside of the end cover 12 and connected to the end cover 12. Both ends of the main shaft 7 are provided with splines (not shown) for connecting with the brake 11. The present invention uses two sets of brakes 11, which are respectively located at both ends of the base 1, which effectively reduces noise, and adopts the installation method of the end cover, which is convenient for the installation and maintenance of the brake. The end face of the main shaft 7 is provided with an encoder 13 for monitoring the main shaft speed.

[0019] Furthermore, the first bearing 8 is a deep groove ball bearing, and the first bearing 8 is arranged on the side close to the rotor 5. The second bearing 9 and the third bearing 10 are spherical roller bearings, and the second bearing 9 and the third bearing 10 are respectively arranged on both sides of the traction wheel 6. The first bearing 8, the second bearing 9 and the third bearing 10 can withstand radial loads and certain axial loads. The main shaft 7 includes a first step portion 14 and a second step portion 15. The diameter of the first step portion 14 is greater than the diameter of the second step portion 15. The first bearing 8 and the second bearing 9 are arranged on the first step portion 14, and the third bearing 10 is arranged on the second step portion 15. The pressure at the first step portion 26 is greater, so the diameter is large to extend the life. The traction wheel 4 is located in the middle of the second bearing 9 and the third bearing 10, and is supported at both ends, so it can withstand a larger load.

[0020] The present invention adopts two sets of brakes 11 respectively located at the two ends of the machine base 1, thereby enhancing the braking force and improving the safety performance of the elevator; the machine base adopts an integral structural design, the traction wheel 6 is located in the middle position, and is supported by the two ends of the bearing, which is convenient for optimizing the force, making the traction machine more stable and reliable when bearing a large load, and improving the overall stability and service life of the traction machine; by adopting the installation method of the end cover 12, the installation and maintenance of the brake 11 are more convenient and quick. The main shaft 7 adopts a two-end spline fit, which is convenient for the installation and connection of the brake, and improves the connection strength between the brake 11 and the main shaft 7.

[0021] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0022] 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. A low-speed, high-load traction machine, comprising a machine base, characterized in that: The machine base includes a first receiving cavity and a second receiving cavity, a stator connected to the inner wall of the machine base and a rotor arranged in the stator are arranged in the first receiving cavity, a traction wheel is arranged in the second receiving cavity, a rotatable main shaft passes through the first receiving cavity and the second receiving cavity and is connected to the rotor and the traction wheel, a bearing chamber is arranged on the machine base, a first bearing, a second bearing and a third bearing are arranged in the bearing chamber, the first bearing, the second bearing and the third bearing are all sleeved on the main shaft, both ends of the main shaft extend out of the machine base, and both ends of the main shaft are connected to brakes.

2. The low-speed, high-load traction machine according to claim 1, characterized in that: End covers are arranged on both sides of the machine base. The end covers are sleeved on the main shaft and connected to the machine base. The brake is arranged on the outer side of the end covers and connected to the end covers.

3. The low-speed, high-load traction machine according to claim 2, characterized in that: An encoder is arranged on the end face of the main shaft.

4. The low-speed, high-load traction machine according to claim 1, characterized in that: The first bearing is a deep groove ball bearing, which is arranged on a side close to the rotor; the second bearing and the third bearing are spherical roller bearings, which are arranged on both sides of the traction wheel respectively.

5. The low-speed, high-load traction machine according to claim 1, characterized in that: The main shaft comprises a first step portion and a second step portion, the diameter of the first step portion is greater than the diameter of the second step portion, the first bearing and the second bearing are arranged on the first step portion, and the third bearing is arranged on the second step portion.

6. The low-speed, high-load traction machine according to claim 1, characterized in that: Both ends of the main shaft are provided with splines for connecting with the brake.

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