Brushless motor structure

Abstract

A brushless motor structure comprises a framework, a magnetic rotor and at least two silicon steel frames, the framework is in a circular ring shape, at least two winding reels evenly distributed in the circumferential direction are arranged on the outer ring side of the framework, the axes of the winding reels coincide with the radial direction of the framework, and coils are wound on the peripheral sides of the winding reels; the silicon steel frames correspond to the winding reels one by one, each silicon steel frame comprises a cross rod, an insertion rod vertically connected to the middle of the cross rod and side rods vertically connected to the two ends of the cross rod respectively, so that the silicon steel frames form an E shape, the cross rods are located on the sides, away from the framework, of the winding reels, the insertion rods are inserted into inner holes of the winding reels, and the two side rods are located on the two sides of the winding reels respectively; claw poles are arranged at the ends, close to the framework, of the inserting rods and the side rods; and the magnetic rotor is rotationally matched with the inner ring side of the framework. According to the scheme, more claw poles can be provided on the basis of ensuring the compact structure, and a more accurate control effect on the magnetic rotor is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of motor structure, more particularly to a brushless motor structure. BACKGROUND

[0002] In recent years, the automobile industry is developing towards automation and intelligence, and the air conditioning system equipped on the automobile and the thermal management system have more and more requirements for actuators such as motors, and the requirements for driving efficiency, power consumption and control accuracy of the actuators are also more and more demanding.

[0003] The current brushless motor generally uses galvanized sheet as the stator, and sets up the bent claw pole on the galvanized sheet to form the magnetic pole piece. However, such brushless motor gradually cannot meet the customer's demand in terms of working efficiency and space ratio, and there is an urgent need for a driving motor with small space ratio, high efficiency conversion and accurate control. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a driving motor with small space ratio, high efficiency conversion and accurate control.

[0005] To solve the above problems, the utility model provides a brushless motor structure, which comprises a framework, a magnetic rotor and at least two silicon steel frames, the framework is circular, at least two winding drums are uniformly distributed on the outer ring side of the framework, the axis of the winding drum coincides with the radial direction of the framework, and a coil is wound on the outer circumferential side of the winding drum.

[0006] The silicon steel frame corresponds to the winding drum one by one, the silicon steel frame comprises a horizontal rod, a plug rod vertically connected to the middle part of the horizontal rod and side rods respectively vertically connected to both ends of the horizontal rod, so that the silicon steel frame forms a "mountain" shape, the horizontal rod is located on the side of the winding drum away from the framework, the plug rod is inserted into the inner hole of the winding drum, and the two side rods are respectively located on both sides of the winding drum, and the end of the plug rod and the side rod close to the framework is a claw pole.

[0007] The magnetic rotor is rotationally connected to the inner ring side of the framework.

[0008] The above scheme optimizes the structure of the brushless motor, by arranging the winding drums in the circumferential direction on the outer ring side of the skeleton, and designing a "mountain" shaped silicon steel frame, the silicon steel has better magnetic conductivity, the silicon steel frame is fixed by inserting the inserting rod into the inner hole of the winding drum, and the end of the inserting rod and the side rod of the silicon steel frame close to the skeleton is a claw pole, so that more claw poles can be obtained on the basis of ensuring compact structure, and more accurate control of the magnetic rotor is realized. Compared with the prior art, the brushless motor structure of the above scheme has small space occupation, high driving efficiency and high control accuracy. The brushless motor of the above scheme can effectively save the space occupied by the product after being applied to the product, and is especially suitable for use in the interior structure of a car.

[0009] In an improved scheme, the winding drums and the silicon steel frames are four, the ends of the side rods of the adjacent silicon steel frames close to the skeleton abut each other, so that better driving efficiency and control accuracy can be achieved.

[0010] In an improved scheme, the magnetic rotor comprises a metal shaft and a circular truncated cone-shaped magnetic block coaxially connected to the metal shaft.

[0011] In an improved scheme, a PCB board and a number of pins equal to the number of winding drums are further included, the PCB board is connected to any end face of the skeleton through the pins, and the coil is electrically connected to the pins.

[0012] In an improved scheme, the pins are fish-eye pins, which are convenient to assemble, do not need to be welded, and can quickly and efficiently transmit signals.

[0013] In an improved scheme, the end face of the skeleton facing the PCB board is provided with a plurality of winding columns arranged in the circumferential direction, and the winding columns are used for winding the enameled wire of the coil.

[0014] In an improved scheme, the inserting rod and the inner hole of the winding drum are in interference fit, so as to ensure the stability of the connection between the silicon steel frame and the winding drum.

[0015] In an improved scheme, the silicon steel frame is made of silicon steel sheets through a riveting process, which has high processing efficiency and good forming quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole schematic view of a brushless motor structure;

[0017] Figure 2 It is a schematic view of a brushless motor structure after the PCB board is hidden;

[0018] Figure 3 It is a top view schematic view of a brushless motor structure;

[0019] Figure 4 It is a side view schematic view of a brushless motor structure; Figure 3A-A section line of the cross-sectional view;

[0020] Figure 5 for along Figure 4 B-B section line of the cross-sectional view.

[0021] Explanation of reference signs,

[0022] 1, skeleton; 11, winding drum; 12, coil; 13, winding column; 2, magnetic rotor; 21, metal shaft; 22, magnetic block; 3, silicon steel frame; 31, cross rod; 32, plug rod; 33, side rod; 3a, claw pole; 4, PCB board; 41, pin. DETAILED DESCRIPTION

[0023] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments as needed in order to adapt to specific application occasions.

[0024] In the description of the following embodiments, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0025] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0026] The present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0027] Please refer to Figures 1-5 The embodiment of the utility model provides a kind of brushless motor structure, including skeleton 1, magnetic rotor 2 and at least two silicon steel frames 3, skeleton 1 is circular, and the outer ring side of skeleton 1 is equipped with at least two winding drums 11 that are evenly distributed along circumference, the axis of winding drum 11 coincides with the radial direction of skeleton 1, and coil 12 is wound on the outer circumferential side of winding drum 11;

[0028] The silicon steel frame 3 corresponds to the winding drum 11 one by one, the silicon steel frame 3 comprises a horizontal rod 31, a plug rod 32 vertically connected to the middle of the horizontal rod 31, and side rods 33 vertically connected to both ends of the horizontal rod 31 respectively, so that the silicon steel frame 3 forms a "mountain" shape, the horizontal rod 31 is located on the side of the winding drum 11 away from the skeleton 1, the plug rod 32 is inserted into the inner hole of the winding drum 11, and the two side rods 33 are located on both sides of the winding drum 11 respectively, and the end of the plug rod 32 and the side rod 33 close to the skeleton 1 is a claw pole 3a.

[0029] The magnetic rotor 2 is rotationally fitted to the inner ring side of the skeleton 1.

[0030] The above scheme optimizes the structure of the brushless motor, by arranging the winding drums 11 on the outer ring side of the skeleton 1 in a circumferential distribution, and designing the "mountain" shaped silicon steel frame 3, the silicon steel has better magnetic conductivity, the silicon steel frame 3 is fixed by inserting the plug rod 32 into the inner hole of the winding drum 11, and the end of the plug rod 32 and the side rod 33 of the silicon steel frame 3 close to the skeleton 1 is a claw pole 3a, so that more claw poles 3a can be obtained on the basis of ensuring compact structure, and more accurate control of the magnetic rotor 2 can be realized. Compared with the prior art, the structure of the brushless motor of the above scheme has small space occupation, high driving efficiency, and high control accuracy. The brushless motor of the above scheme can effectively save the space occupied by the product after being applied to the product, and is especially suitable for use in automotive interior structures.

[0031] In the embodiment, the winding drums 11 and the silicon steel frames 3 are both four, the ends of the side rods 33 of the adjacent silicon steel frames 3 close to the skeleton 1 abut each other, so that better driving efficiency and control accuracy can be achieved. The four silicon steel frames 3 correspond to twelve claw poles 3a, in addition, the gap between the plug rod 32 and the side rod 33 of the same silicon steel frame 3 is a gap area, the four silicon steel frames 3 have a total of eight gap areas, and the twelve claw poles 3a and the eight gap areas are arranged around the magnetic rotor 2; the magnetic poles on the magnetic rotor 2 should be an even number, for example, ten pairs, so that accurate control can be achieved.

[0032] In the embodiment, the magnetic rotor 2 comprises a metal shaft 21 and a circular truncated cone-shaped magnetic block 22 coaxially connected to the metal shaft 21.

[0033] In the embodiment, a PCB board 4 and a number of insertion pins 41 equal to the winding drums 11 are further included, the PCB board 4 is connected to any end face of the skeleton 1 through the insertion pins 41, and the coil 12 is electrically connected to the insertion pins 41. Further, the insertion pins 41 are fish eye insertion pins 41, which are convenient to assemble, do not need to be welded, and can quickly and efficiently transmit signals.

[0034] In the embodiment, the end face of the skeleton 1 facing the PCB board 4 is provided with a plurality of winding columns 13 distributed in a circumferential direction, and the winding columns 13 are used for winding and connecting the enameled wire of the coil 12.

[0035] In the embodiment, the plug rod 32 is in interference fit with the inner hole of the bobbin 11, so as to ensure the stability of the connection between the silicon steel frame 3 and the bobbin 11.

[0036] In the embodiment, the silicon steel frame 3 is made of silicon steel sheets through the riveting process, so as to have high processing efficiency and good forming quality.

[0037] It should be noted that, in the description of the present application, the terms indicating the direction or position relationship such as "inner", "outer" and the like are based on the direction or position relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or member 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; all directional indications (such as up, down, left, right, front, back, inner, outer) are only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0038] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "in the embodiment", "specific example" or "some examples" and the like means that the specific features, mechanisms, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0039] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A brushless motor structure, characterized in that, It includes a frame (1), a magnetic rotor (2) and at least two silicon steel frames (3). The frame (1) is circular. At least two winding bobbins (11) are evenly distributed in the circumference on the outer ring side of the frame (1). The axis of the winding bobbins (11) coincides with the radial direction of the frame (1). A coil (12) is wound on the outer circumference side of the winding bobbins (11). The silicon steel frame (3) corresponds to the winding drum (11) one by one. The silicon steel frame (3) includes a crossbar (31), a rod (32) vertically connected to the middle of the crossbar (31), and side rods (33) vertically connected to both ends of the crossbar (31) respectively, so that the silicon steel frame (3) forms a "mountain" shape. The crossbar (31) is located on the side of the winding drum (11) away from the frame (1). The rod (32) is inserted into the inner hole of the winding drum (11), and the two side rods (33) are located on both sides of the winding drum (11) respectively. The end of the rod (32) and the side rod (33) near the frame (1) is a claw pole (3a). The magnetic rotor (2) rotates and engages with the inner ring side of the frame (1).

2. The brushless motor structure according to claim 1, characterized in that, There are four winding cylinders (11) and four silicon steel frames (3). The side rods (33) of adjacent silicon steel frames (3) abut against each other at the end closest to the skeleton (1).

3. The brushless motor structure according to claim 1 or 2, characterized in that, The magnetic rotor (2) includes a metal shaft (21) and a frustum-shaped magnetic block (22) coaxially connected to the metal shaft (21).

4. The brushless motor structure according to claim 1 or 2, characterized in that, It also includes a PCB board (4) and a number of pins (41) equal to the number of winding spools (11), the PCB board (4) being connected to any end face of the skeleton (1) via the pins (41), and the coil (12) being electrically connected to the pins (41).

5. The brushless motor structure according to claim 4, characterized in that, The insert (41) is a fisheye insert (41).

6. The brushless motor structure according to claim 4, characterized in that, The skeleton (1) has multiple circumferentially distributed winding posts (13) on the end face facing the PCB board (4).

7. The brushless motor structure according to claim 1 or 2, characterized in that, The insertion rod (32) and the inner hole of the winding drum (11) are interference fit.

8. The brushless motor structure according to claim 1 or 2, characterized in that, The silicon steel frame (3) is made of silicon steel sheets by a stacking and riveting process.

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