Brushless motor

Abstract

The brushless motor comprises a motor, the motor is provided with a support, a stator, a rotor and a rotating shaft, the support is provided with a shaft hole penetrating through the support, the stator is fixed on the outer side of the support, and the rotating shaft penetrates through the shaft hole and is connected with the rotor; t-shaped step grooves are symmetrically formed in the positions, located on the two sides of the shaft hole, of the support respectively, T-shaped bearings are arranged on the T-shaped step grooves and are oil-retaining bearings of T-shaped structures, the T-shaped bearings are assembled in the T-shaped step grooves in an embedded mode, circular ring grooves are formed between the T-shaped bearings and the T-shaped step grooves after the T-shaped bearings are assembled, and the circular ring grooves are filled with wool felts capable of storing lubricating oil. The rotating shaft penetrates through the two T-shaped bearings, and the wool felt can supplement lubricating oil to the T-shaped bearings. Two T-shaped bearing and wool felt structures are symmetrically assembled on the bracket, and the rotating shaft is in clearance fit with the T-shaped bearings, so that semi-automatic assembly can be realized, and the production efficiency is improved; the annular groove is almost in a sealed state, lubricating oil on the wool felt can be effectively prevented from volatilizing, and the service life of the lubricating oil is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically to a brushless motor. Background Art

[0002] The current motor industry is facing the pressure of high material and labor costs. In order to improve production efficiency, it is necessary to optimize the structure of the motor so that the production can be semi-automated or fully automated, thereby reducing labor manufacturing costs. At the same time, by optimizing the structure, low-cost parts are used to meet design requirements and product requirements. At present, most brushless motor support shaft core components use a rolling bearing structure. Rolling bearings are easily damaged during installation, which increases the difficulty of production and the cost is also relatively high. In order to solve these problems, this patent designs a new motor structure. The front and rear supports use an oil-containing bearing plus wool felt structure. The shaft core and the oil-containing bearing use a clearance fit, which can achieve semi-automatic assembly and improve production efficiency. At the same time, it is not easy to damage the bearing and reduce material scrap. Utility Model Content

[0003] In view of this, the utility model provides a brushless motor.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A brushless motor comprises a motor, wherein the motor is provided with a bracket, a stator, a rotor and a rotating shaft. The bracket is provided with an axial hole passing through the bracket, the stator is fixed on the outside of the bracket, the rotating shaft passes through the axial hole and is connected to the rotor; the bracket is symmetrically provided with T-shaped step grooves on both sides of the axial hole, the T-shaped step grooves are provided with T-shaped bearings, the T-shaped bearings are oil-containing bearings of "T"-shaped structure, the T-shaped bearings are embedded and assembled in the T-shaped step grooves, an annular groove is formed between the T-shaped bearings and the T-shaped step grooves after assembly, the annular groove is filled with wool felt for storing lubricating oil, the rotating shaft passes through two T-shaped bearings respectively, and the wool felt can replenish lubricating oil to the T-shaped bearings.

[0006] In the preferred technical solution, the outer side surface of one end of the T-type bearing is formed with a convex ring portion protruding outward, and the convex ring portion makes the T-type bearing form a "T"-shaped structure. The T-shaped step groove includes an outer hole with a larger aperture located on the outer side of the bracket and an inner hole with a smaller aperture on the inner side. The T-shaped step groove forms a step-like structure by combining the outer hole and the inner hole. After the T-type bearing is assembled into the T-shaped step groove, the annular groove is formed between the inner side surface of the convex ring portion and the bottom surface of the outer hole.

[0007] In the preferred technical solution, the rotating shaft and the T-shaped bearing are clearance-fitted, and the surface roughness of the rotating shaft is less than Ra0.2.

[0008] In the preferred technical solution, the rotor is in a round bowl-shaped structure, and a magnet ring matching the stator is provided on the inner side of the rotor.

[0009] In a preferred technical solution, a plurality of first positioning protrusions are provided on the outer side of the bracket, the stator is provided with a fixing hole, and a plurality of first positioning grooves matching the first positioning protrusions are provided on the side of the fixing hole.

[0010] In a preferred technical solution, a plurality of second positioning protrusions are provided on the outer side of the bracket, a circuit board is sleeved on the outer side of the bracket, the circuit board has a mounting hole, and the mounting hole has a plurality of second positioning grooves matching the second positioning protrusions.

[0011] In the preferred technical solution, a wear-resistant meson is sleeved on the outer side of the T-shaped bearing on the rotating shaft.

[0012] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial technical effects:

[0013] Two T-shaped bearings and wool felt structures are symmetrically assembled on the bracket, and the rotating shaft and the T-bearing adopt clearance fit to realize semi-automatic assembly and improve production efficiency; the rotating shaft can ensure rotation stability through the connection of two T-shaped bearings; an annular groove is formed between the T-shaped step groove and the T-shaped bearing, and the annular groove is filled with wool felt for storing lubricating oil, and the wool felt can replenish lubricating oil for the T-shaped bearing; the T-shaped bearing is an oil-containing bearing, which is lower in cost than rolling bearings and can save use or production costs; the wool felt storing lubricating oil can continuously replenish lubricating oil for the T-shaped bearing, and the annular groove is almost in a sealed state through the isolation of the convex ring part, which can effectively prevent the lubricating oil on the wool felt from evaporating, prolong the use time of the lubricating oil, thereby prolonging the service life of the T-shaped bearing, and solves the problem of short bearing service life caused by the rapid evaporation of lubricating oil exposed in the wool felt of general oil-containing bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the exploded structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the exploded cross-sectional structure of the utility model.

[0018] Figure 4 Schematic diagram of the exploded structure of the bracket and T-bearing.

[0019] Figure 5 Schematic diagram of the exploded cross-section structure of the bracket and T-bearing.

[0020] Figure numbers: 100, motor; 110, bracket; 120, stator; 130, rotor; 140, rotating shaft; 111, shaft hole; 150, T-shaped step groove; 160, T-shaped bearing; 151, annular groove; 152, wool felt; 161, convex ring; 153, outer hole; 154, inner hole; 131, magnet ring; 115, first positioning protrusion; 112, first positioning groove; 170, circuit board; 113, second positioning protrusion; 171, second positioning groove; 172, mounting hole; 132, meson. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0022] In the description of the present application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 application. In the description of the present application, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0024] A brushless motor, see Figure 1-5, including a motor 100, the motor 100 is provided with a bracket 110, a stator 120, a rotor 130, and a rotating shaft 140. The bracket 110 is provided with an axial hole 111 passing therethrough, the stator 120 is fixed to the outside of the bracket 110, the rotating shaft 140 passes through the axial hole 111 and is connected to the rotor 130, and the rotating shaft 140 is driven to rotate when the rotor 130 rotates; the bracket 110 serves as a supporting structure of the motor 100, and the bracket 110 is symmetrically provided with T-shaped step grooves 150 on both sides of the axial hole 111, the aperture of the axial hole 111 is smaller than the T-shaped step groove 150, and a T-shaped bearing 160 is provided on the T-shaped step groove 150, and the rotating shaft 140 passes through two T-shaped bearings 160 respectively, and the T-shaped bearing 160 is connected to the rotating shaft 140, and the rotating shaft 140 passes through two T-shaped bearings The connection of 160 can rotate smoothly; after the T-shaped bearing 160 is assembled, an annular groove 151 is formed between the T-shaped bearing 160 and the T-shaped step groove 150, and the annular groove 151 is filled with wool felt 152 that can store lubricating oil, and the wool felt 152 can replenish the lubricating oil to the T-shaped bearing 160; the T-shaped bearing 160 is an oil-containing bearing with a "T"-shaped structure, which is lower in cost than rolling bearings, and can save usage or production costs. The T-shaped step grooves 150 symmetrically arranged by the bracket 110 make the installation of the T-shaped bearing 160 more convenient, and the two T-shaped bearings 160 are connected to the rotating shaft 140 at the same time, which improves the smoothness and stability of the rotating shaft 140 when rotating; the wool felt 152 that stores lubricating oil can continuously replenish the lubricating oil to the T-shaped bearing 160, thereby extending the service life of the T-shaped bearing.

[0025] Furthermore, a convex ring portion 161 protruding outward is formed on the outer side surface of one end of the T-shaped bearing 160, and the convex ring portion 161 makes the T-shaped bearing 160 form a "T"-shaped structure. The T-shaped step groove 150 includes an outer hole 152 with a larger aperture located on the outer side of the bracket 110 and an inner hole 153 with a smaller aperture on the inner side. The T-shaped step groove 150 forms a stepped structure by combining the outer hole 152 and the inner hole 153, so that the T-shaped step groove 150 forms a "T" shape in cross section. The two T-shaped step grooves 150 on the bracket 110 are symmetrically arranged, with the outer hole 152 facing outward and the inner hole 153 facing inward. The two T-shaped step grooves 150 have the same size, such as Figure 5 As shown, the T-shaped step groove 150 includes two sections, an outer hole 152 and an inner hole 153. For example, the size of the outer hole 152 is The size of inner hole 153 is The T-shaped bearing 160 corresponds to the structure of the T-shaped step groove 150 and is embedded in the T-shaped step groove. The bottom surface of the inner side of the T-shaped bearing 160 is against the bottom surface of the inner hole 153. The convex ring portion 161 on the installed T-shaped bearing 160 faces outward, and the annular groove 151 is formed between the inner side surface of the convex ring portion 161 and the bottom surface of the outer hole 152. Since the annular groove 151 is located inside the bracket 110, the annular groove 151 is almost in a sealed state through the isolation of the convex ring portion 161, so that the wool felt 152 filled therein can be isolated inside, effectively preventing the lubricating oil on the wool felt 152 from evaporating, extending the service life of the lubricating oil, thereby extending the service life of the T-shaped bearing 160, solving the problem of short bearing service life caused by the rapid evaporation of the exposed lubricating oil in the wool felt of general oil-containing bearings.

[0026] Furthermore, the rotating shaft 140 and the T-shaped bearing 160 are clearance-fitted, which can realize semi-automatic assembly and improve production efficiency. At the same time, the bearing is not easily damaged during assembly, which reduces the scrapping of materials. The surface roughness of the rotating shaft 140 is less than Ra0.2, which reduces the friction with the T-shaped bearing 160 and can meet the use of low-speed and low-power (speed less than 5000RPM, power less than 120W) motors and can meet the design life requirements; the rotor 130 is a circular basin-shaped structure, and a magnet ring 131 matching the stator 120 is provided on the inner side of the rotor 130. The rotor 130 wraps the outer side of the stator 120, and a winding is provided on the stator 120 to drive the rotor 130 to rotate after power is turned on, so that the rotating shaft 140 connected to the rotor 130 rotates.

[0027] Furthermore, a plurality of first positioning protrusions 115 are provided on the outer side of the bracket 110, a fixing hole is provided on the stator 120, and a plurality of first positioning grooves 112 matching the first fixing protrusions 111 are provided on the side of the fixing hole, and the stator 120 is sleeved on the bracket 110 through the first positioning grooves 112 to align with the first positioning protrusions 115; a plurality of second positioning protrusions 113 are provided on the outer side of the bracket 110, and a circuit board 170 is sleeved on the outer side of the bracket 110, and the circuit board 170 is provided with a mounting hole 114, and the mounting hole 114 is provided with a plurality of second positioning grooves 171 matching the second positioning protrusions 113, and the circuit board 170 is sleeved on the bracket 110 through the second positioning grooves 171 on the mounting hole 172 to align with the second positioning protrusions 113, and a protruding structure is provided on the second positioning protrusion 113 to improve the connection stability between the circuit board 170 and the bracket 110; a wear-resistant meson 132 is sleeved on the outer side of the T-shaped bearing 160 on the rotating shaft 140 to improve the stability of the rotating shaft 140 during rotation.

[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A brushless motor, comprising a motor (100), wherein the motor (100) is provided with a bracket (110), a stator (120), a rotor (130), and a rotating shaft (140), wherein the bracket (110) is provided with an axial hole (111) passing therethrough, the stator (120) is fixed to the outside of the bracket (110), and the rotating shaft (140) passes through the axial hole (111) and is connected to the rotor (130); characterized in that: The bracket (110) is symmetrically provided with T-shaped step grooves (150) on both sides of the shaft hole (111), and a T-shaped bearing (160) is provided on the T-shaped step groove (150). The T-shaped bearing (160) is an oil-containing bearing with a "T"-shaped structure. The T-shaped bearing (160) is embedded and assembled in the T-shaped step groove (150). After the T-shaped bearing (160) is assembled, an annular groove (151) is formed between the T-shaped bearing (160) and the T-shaped step groove (150). The annular groove (151) is filled with wool felt (152) for storing lubricating oil. The rotating shaft (140) passes through the two T-shaped bearings (160) respectively, and the wool felt (152) can replenish lubricating oil to the T-shaped bearing (160).

2. A brushless motor according to claim 1, characterized in that: The outer side surface of one end of the T-shaped bearing (160) is formed with a convex ring portion (161) protruding outward, and the convex ring portion (161) enables the T-shaped bearing (160) to form a "T"-shaped structure. The T-shaped step groove (150) includes an outer hole (153) with a larger aperture located on the outer side of the bracket (110) and an inner hole (154) with a smaller aperture on the inner side. The T-shaped step groove (150) forms a step-shaped structure by combining the outer hole (153) and the inner hole (154). After the T-shaped bearing (160) is assembled into the T-shaped step groove (150), the annular groove (151) is formed between the inner side surface of the convex ring portion (161) and the bottom surface of the outer hole (153).

3. A brushless motor according to claim 1, characterized in that: The rotating shaft (140) and the T-shaped bearing (160) are clearance-fitted, and the surface roughness of the rotating shaft (140) is less than Ra0.

2.

4. A brushless motor according to claim 1, characterized in that: The rotor (130) is in a circular bowl-shaped structure, and a magnet ring (131) matching the stator (120) is arranged inside the rotor (130).

5. A brushless motor according to claim 1, characterized in that: The bracket (110) is provided with a plurality of first positioning protrusions (115) on the outside, the stator (120) is provided with a fixing hole, and the side surface of the fixing hole is provided with a plurality of first positioning grooves (112) matching the first positioning protrusions (115).

6. A brushless motor according to claim 1, characterized in that: A plurality of second positioning protrusions (113) are provided on the outside of the bracket (110), a circuit board (170) is sleeved on the outside of the bracket (110), the circuit board (170) is provided with a mounting hole (172), and a plurality of second positioning grooves (171) matching the second positioning protrusions (113) are provided on the mounting hole (172).

7. The brushless motor according to claim 1, characterized in that: The rotating shaft (140) is sleeved with a wear-resistant meson (132) on the outer side of the T-shaped bearing (160).

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