High-speed motor structure

Abstract

The utility model provides a high-speed motor structure which comprises a shell, a middle shaft, a stator, a rotor and a bearing, the periphery of the middle shaft is rotatably sleeved to the inner ring of the shell through the bearing, the rotor is arranged on the periphery of the middle shaft and located in the shell, the stator is fixedly installed in the shell, the stator and the rotor are concentrically arranged, and an oil way is arranged on the shell. The inlet end of the oil way is connected to oil injection equipment, and the outlet end of the oil way is located on the periphery or end of the bearing. According to the high-speed motor structure provided by the utility model, the external oil injection equipment injects lubricating oil into the bearing through the oil path, so that the lubrication degree of the bearing is improved, the friction force of rotation of the bearing is reduced, and the problems of insufficient motor output and short service life of the equipment caused by overlarge friction force are avoided.

Description

Technical Field

[0001] The utility model belongs to the field of high-speed motors, and in particular relates to a high-speed motor structure. Background Art

[0002] High-speed motors usually refer to motors with speeds exceeding 10,000 r / min. They have high speeds, are much smaller than ordinary power motors, are connected to the prime mover, eliminate the traditional reduction mechanism, and have small rotational inertia. Therefore, they have the advantages of high motor power density, effective material saving, high transmission efficiency, low noise, and fast dynamic response. When high-speed motors in the prior art are used, in order to avoid the transmission components reducing the speed of the spindle, the spindle shaft end is usually connected to the housing through an angular contact ball bearing, but the spindle output is affected due to inadequate lubrication or wear of parts. Utility Model Content

[0003] In view of this, the utility model aims to propose a high-speed motor structure to solve the problem that when the high-speed motor in the prior art is in use, the supporting bearing is used for a long time, the friction increases due to insufficient lubrication, resulting in insufficient equipment output.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A high-speed motor structure includes a shell, a central shaft, a stator, a rotor and a bearing. The outer periphery of the central shaft is rotatably sleeved to the inner ring of the shell through the bearing, and the rotor is arranged on the outer periphery of the central shaft. The rotor is located inside the shell. The stator is fixedly installed inside the shell, and the stator and the rotor are arranged concentrically. An oil circuit is provided on the shell, the inlet end of the oil circuit is connected to the oil injection equipment, and the outlet end of the oil circuit is located on the outer periphery or end of the bearing.

[0006] Furthermore, the outlet end of the oil circuit is located on the outside of the bearing, and the rotor is located on the inside of the bearing.

[0007] Furthermore, the shell is provided with air holes, and the external gas injection equipment is connected to the inside of the shell through the air holes.

[0008] Furthermore, end covers are respectively arranged at both ends of the shell, the oil circuit is arranged on the end covers, and the periphery of the central shaft is rotatably sleeved on the end covers through bearings.

[0009] Furthermore, the rotor includes a magnet and a sleeve, and a central axis is respectively arranged at both ends of the magnet, the outer periphery of the magnet is fixedly sleeved with the sleeve, the inner rings at both ends of the sleeve are respectively fixedly connected to one end of a central axis, and the outer periphery of each central axis is rotatably sleeved to the inner ring of the outer shell through a bearing.

[0010] Furthermore, the sleeve is arranged concentrically with the stator.

[0011] Compared with the prior art, the high-speed motor structure described in the utility model has the following beneficial effects:

[0012] (1) In the high-speed motor structure described in the utility model, an external oiling device fills lubricating oil into the bearing through an oil circuit to improve the lubrication of the bearing, reduce the friction of the bearing rotation, and avoid the problem of insufficient motor output and short equipment service life caused by excessive friction.

[0013] (2) The utility model describes a high-speed motor structure in which an external gas injection device can inject pressure into the housing so that the inside of the housing is at a positive pressure relative to the outside, the lubricating oil soaks into the bearings, and the positive pressure inside the housing prevents the lubricating oil from flowing into the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0015] Figure 1 A cross-sectional schematic diagram of a high-speed motor structure according to an embodiment of the utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of a first embodiment of the utility model in which an oil passage is provided on the end cover;

[0017] Figure 3 This is a cross-sectional schematic diagram of a second embodiment of the utility model in which an oil circuit is provided on the end cover.

[0018] Description of reference numerals:

[0019] 1-housing; 2-central shaft; 3-stator; 4-rotor; 41-sleeve; 42-magnet; 5-end cover; 6-bearing; 7-oil circuit; 8-air hole. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0024] like Figure 1-Figure 3 As shown, a high-speed motor structure includes a shell 1, a central shaft 2, a stator 3, a rotor 4 and a bearing 6. The outer periphery of the central shaft 2 is rotatably sleeved to the inner ring of the shell 1 through the bearing 6, and the rotor 4 is arranged on the outer periphery of the central shaft 2, and the rotor 4 is located inside the shell 1. The stator 3 is fixedly installed inside the shell 1, and the stator 3 and the rotor 4 are arranged concentrically. An oil circuit 7 is provided on the shell 1, and the inlet end of the oil circuit 7 is connected to an oil filling device, and the outlet end of the oil circuit 7 is located at the outer periphery or end of the bearing 6. The external oil filling device fills lubricating oil into the bearing 6 through the oil circuit 7, so as to improve the lubrication of the bearing 6, reduce the friction of the bearing 6 when rotating, and avoid the problem of insufficient motor output and low equipment service life caused by excessive friction.

[0025] The outlet end of the oil circuit 7 is located on the outside of the bearing 6, and the rotor 4 is located on the inside of the bearing 6. An air hole 8 is provided on the outer shell 1. The external air injection equipment is connected to the inside of the outer shell 1 through the air hole 8. The external air injection equipment can inject pressure into the outer shell 1 so that the inside of the outer shell 1 is at a positive pressure relative to the outside. The lubricating oil soaks the bearing 6, and the positive pressure inside the outer shell 1 prevents the lubricating oil from flowing into the inner shell 1.

[0026] In order to facilitate the installation of the central shaft 2, the rotor 4, and the stator 3, end covers 5 are respectively provided at both ends of the housing 1, and the oil circuit 7 is provided on the end covers 5. The periphery of the central shaft 2 is rotatably sleeved on the end covers 5 through the bearing 6. The oil circuit 7 is provided on the end covers 5 to implement various embodiments, such as Figure 2 As shown, in the first embodiment of the oil circuit 7, the oil circuit 7 is arranged along the radial direction of the end cover 5, as shown in FIG. Figure 3 As shown, a second embodiment of the oil circuit 7 is provided, in which the oil circuit 7 is arranged along the axial direction of the end cover 5 .

[0027] The rotor 4 includes a magnet 42 and a sleeve 41, and a central shaft 2 is respectively arranged at both ends of the magnet 42, the outer periphery of the magnet 42 is fixedly sleeved with the sleeve 41, and the inner rings at both ends of the sleeve 41 are respectively fixedly connected to one end of a central shaft 2, and the outer periphery of each central shaft 2 is rotatably sleeved to the inner ring of the outer shell 1 through a bearing 6, wherein the sleeve 41 is concentrically arranged with the stator 3, and the magnet 42 is a permanent magnet.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed motor structure, characterized in that: The invention comprises a housing (1), a central shaft (2), a stator (3), a rotor (4) and a bearing (6); the outer periphery of the central shaft (2) is rotatably sleeved to the inner ring of the housing (1) through the bearing (6); the rotor (4) is arranged on the outer periphery of the central shaft (2); the rotor (4) is located inside the housing (1); the stator (3) is fixedly installed inside the housing (1); the stator (3) and the rotor (4) are arranged concentrically; an oil circuit (7) is arranged on the housing (1); the inlet end of the oil circuit (7) is connected to an oil injection device; the outlet end of the oil circuit (7) is located on the outer periphery or end of the bearing (6).

2. A high-speed motor structure according to claim 1, characterized in that: The outlet end of the oil passage (7) is located on the outside of the bearing (6), and the rotor (4) is located on the inside of the bearing (6).

3. A high-speed motor structure according to claim 1, characterized in that: An air hole (8) is provided on the outer shell (1), and an external gas injection device is connected to the interior of the outer shell (1) through the air hole (8).

4. A high-speed motor structure according to claim 1, characterized in that: End covers (5) are respectively arranged at both ends of the housing (1), the oil circuit (7) is arranged on the end covers (5), and the periphery of the central shaft (2) is rotatably sleeved on the end covers (5) via bearings (6).

5. A high-speed motor structure according to claim 1, characterized in that: The rotor (4) comprises a magnetic steel (42) and a sleeve (41), and a central shaft (2) is respectively arranged at two ends of the magnetic steel (42), the outer periphery of the magnetic steel (42) is fixedly sleeved on the sleeve (41), the inner rings at both ends of the sleeve (41) are respectively fixedly connected to one end of a central shaft (2), and the outer periphery of each central shaft (2) is rotatably sleeved on the inner ring of the outer shell (1) via a bearing (6).

6. A high-speed motor structure according to claim 5, characterized in that: The sheath (41) is arranged concentrically with the stator (3).

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