A brushless DC motor for automobile heat dissipation

Abstract

The present invention discloses a DC brushless motor for automobile heat dissipation, comprising a control and heat dissipation component, a stator component and a rotor component, wherein the stator component is fixed to the control and heat dissipation component by bolts, and the rotor component is connected to the control and heat dissipation component by bearings and can rotate around an axis; the stator component comprises an iron core, an upper insulating sleeve, a lower insulating sleeve, and a wire wound on the iron core; the upper insulating sleeve and the lower insulating sleeve are respectively located on both sides of the iron core to completely wrap it so as to insulate and isolate it from the wound wire; the upper insulating sleeve is provided with a conductive seat conductively connected to the control and heat dissipation component, the conductive seat is integrally injection molded with the upper insulating sleeve, and the relative position between the conductive seat and the upper insulating sleeve reaches the final state by installation riveting. The conductive seat is electrically connected to the control and heat dissipation component, the contact area is increased, and the connection is more firm; in addition, a fixing frame is provided in the rotor shell to install the magnetic material in the rotor shell at intervals, thereby improving the stability of the motor performance.

Description

Technical Field

[0001] The invention relates to a brushless DC motor for automobile heat dissipation. Background Art

[0002] Brushless DC motors are gradually replacing brushed motors in the field of automotive heat dissipation due to their advantages of low interference, low noise, smooth operation, long life, and low maintenance costs. Brushless motors are mainly composed of stators, rotors, controllers and other components. The design of the stator structure affects the performance, efficiency and operating stability of brushless DC motors. In existing brushless DC motors, the connection strength between the controller and the stator is not strong enough, the motor is easily damaged, and the service life is affected; in addition, the magnetic material in the stator is easy to loosen, resulting in unstable motor performance. Summary of the invention

[0003] In view of the above problems, the present invention provides a brushless DC motor for automobile heat dissipation, makes partial improvements in the conductive connection between the controller and the stator, and designs a new magnetic material fixing method to ensure the conductive connection strength between the controller and the stator, so as to stabilize the motor performance. The specific technical solution is as follows:

[0004] A brushless DC motor for automobile heat dissipation comprises a control and heat dissipation component, a stator component and a rotor component, wherein the stator component is fixed to the control and heat dissipation component by bolts, and the rotor component is connected to the control and heat dissipation component by bearings and can rotate around an axis; the stator component comprises an iron core, an upper insulating sleeve, a lower insulating sleeve, and a wire wound on the iron core; the upper insulating sleeve and the lower insulating sleeve are respectively located on both sides of the iron core to completely wrap it so as to insulate and isolate it from the wound wire; the upper insulating sleeve is provided with a conductive seat conductively connected to the control and heat dissipation component 1, the conductive seat is integrally injection-molded with the upper insulating sleeve, and the relative position between the conductive seat and the upper insulating sleeve reaches a final state through installation riveting.

[0005] In the aforementioned DC brushless motor for automobile heat dissipation, a conductive connecting rod is provided on the contact surface between the control and heat dissipation component and the stator component, one end of which is fixed to the control and heat dissipation component; and the other end is connected to the conductive seat of the stator component.

[0006] The aforementioned DC brushless motor for automobile heat dissipation has multiple conductive seats and conductive connecting rods, which are evenly distributed around the bearing; the conductive connecting rod is a cylindrical rod, and the connection between it and the conductive seat is arranged in a sheet shape; the conductive seat is designed in an "X" shape, and its convex surface is arranged facing the bearing, and the conductive connecting rod is connected to the convex surface of the conductive seat.

[0007] Preferably, in the aforementioned DC brushless motor for automobile heat dissipation, there are three conductive seats and three conductive connecting rods; the conductive connecting rods and the conductive seats are spot-welded; and wire hooks are provided at both ends of the conductive seats for connecting to specific wires.

[0008] Preferably, in the aforementioned DC brushless motor for automobile heat dissipation, a guide limiter is further provided on the upper insulating sleeve of the stator assembly for guiding the conductive connecting rod to connect with the conductive seat and limiting its position in the circumferential direction.

[0009] Preferably, in the aforementioned DC brushless motor for automobile heat dissipation, the restricted channel of the guide limiter is designed to be narrowed from wide.

[0010] The aforementioned DC brushless motor for automobile heat dissipation, the rotor assembly includes a rotor housing, a magnetic material and a fixing frame for fixing and mounting the magnetic material; the magnetic material and the fixing frame are both fixed to the inner surface of the rotor housing by glue.

[0011] Preferably, in the aforementioned DC brushless motor for automotive heat dissipation, the fixing frame is in the shape of a ring that matches the inner surface of the rotor housing, one side of which is provided with a plurality of positioning support ribs, and the other side of which is provided with fixed separation ribs for isolating adjacent magnetic materials.

[0012] Preferably, in the aforementioned DC brushless motor for automobile heat dissipation, the positioning support ribs include positioning ribs and support ribs, the positioning ribs are used for installation and positioning, and the support ribs are used for support; the angle between the fixed separation ribs corresponds to the spacing angle of the magnetic material.

[0013] Preferably, in the aforementioned brushless DC motor for automobile heat dissipation, the connection interface between the control and heat dissipation component and the outside is an open standard interface.

[0014] The beneficial effects of the present invention are:

[0015] The DC brushless motor for automobile heat dissipation of the present invention has a conductive seat arranged on the insulating sleeve on the stator, and a conductive connecting rod is arranged on the control and heat dissipation components to electrically connect the two, and there are three conductive seats and three conductive connecting rods, and the conductive seat is designed in a "F" shape, and the connection between the conductive connecting rod and the conductive seat is designed in a sheet shape, so that the contact area is increased, the spot welding connection is more firm, and the strength of the conductive connection is enhanced. The rotor shell of the DC brushless motor for automobile heat dissipation of the present invention is provided with a fixing frame to install the magnetic material in the rotor shell at intervals, which is convenient for the installation and replacement of the magnetic material, and the installation is firm, thereby improving the stability of the motor performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an exploded schematic diagram of the structure of the brushless DC motor for automobile heat dissipation of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the control and heat dissipation components of the present invention;

[0018] Figure 3 It is a schematic structural diagram of a stator assembly of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the rotor assembly of the present invention;

[0020] Figure 5 It is a schematic diagram of the fixing frame structure of the present invention.

[0021] In the figure: 1. Control and heat dissipation components; 2. Stator assembly; 21. Iron core; 22. Upper insulating sleeve; 23. Lower insulating sleeve; 24. Wire; 3. Rotor assembly; 31. Rotor shell; 32. Magnetic material; 33. Fixed frame; 331. Positioning support ribs; 332. Fixed separation ribs; 4. Bearing; 5. Conductive seat; 6. Conductive connecting rod; 7. Wire hook; 8. Guide limiter; 9. Connection interface. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The specific embodiments are as follows:

[0023] A brushless DC motor for automotive cooling, such as Figures 1 to 5 As shown, it includes a control and heat dissipation component 1, a stator component 2 and a rotor component 3, wherein the stator component 2 is fixed to the control and heat dissipation component 1 by bolts, and the rotor component 3 is connected to the control and heat dissipation component 1 by a bearing 4 and can rotate around the axis; the stator component 2 includes an iron core 21, an upper insulating sleeve 22, a lower insulating sleeve 23, and a wire 24 wound on the iron core 21; the upper insulating sleeve 22 and the lower insulating sleeve 23 are respectively located on both sides of the iron core 21 to completely wrap it so as to insulate and isolate it from the wound wire 24; the upper insulating sleeve 22 is provided with a conductive seat 5 for conductive connection with the control and heat dissipation component 1, the conductive seat 5 is integrally injection-molded with the upper insulating sleeve 22, and the relative position between the conductive seat 5 and the upper insulating sleeve 22 is different in the uninstalled state and the installed state, and the two reach the final state through the riveting pressure of the installation, thereby strengthening the electrical connection between the stator component 2 and the control and heat dissipation component 1, improving the performance of the motor and extending the service life.

[0024] In this embodiment, the electrical connection between the stator assembly 2 and the control and heat dissipation assembly 1 is achieved by providing a conductive connecting rod 6 on the contact surface between the control and heat dissipation assembly 1 and the stator assembly 2, one end of which is fixed on the control and heat dissipation assembly 1; and the other end is connected to the conductive seat 5 of the stator assembly 2. The conductive seat 5 and the conductive connecting rod 6 are both multiple, preferably three, and are evenly distributed around the bearing 4. In order to enhance the stability of the connection between the conductive connecting rod 6 and the conductive seat 5, the conductive connecting rod 6 is a cylindrical rod, and the connection between it and the conductive seat 5 is set in a sheet shape; the conductive seat 5 is designed in a "F" shape, and its convex surface is set facing the bearing 4. The conductive connecting rod 6 is connected to the convex surface of the conductive seat 5, thereby increasing the contact area and making the connection between the two reliable. Preferably, the conductive seat 5 and the conductive connecting rod 6 are connected by spot welding to increase the firmness of the connection. In addition, wire hooks 7 are provided at both ends of the conductive seat 5 for connecting with specific wires. The specific wire refers to the wire 24 wound on the iron core 21. There are 12 turns of wire wound on the iron core, which are connected to the wire hooks 7 on the three conductive connecting rods 6 according to ABCABCABCABC-A.

[0025] In addition, a guide stopper 8 is further provided on the upper insulating sleeve 22 of the stator assembly 2, which is used to guide the conductive connecting rod 6 to connect with the conductive seat 5 and limit its position in the circumferential direction. The restricted channel of the guide stopper 8 is designed to be narrowed from wide to narrow, so as to facilitate the conductive connecting rod 6 to pass through and limit the movement of the conductive connecting rod 6 in the circumferential direction. Therefore, the guide stopper 8 can be set as two eight-shaped blocks, or other shapes that meet the requirements.

[0026] The DC brushless motor for automobile heat dissipation described in this embodiment, the rotor assembly 3 includes a rotor housing 31, a magnetic material 32 and a fixing frame 33 for fixing and installing the magnetic material 32; the magnetic material 32 and the fixing frame 33 are fixed to the inner surface of the rotor housing 31 by glue. The fixing frame 33 is a circular ring that matches the inner surface of the rotor housing 31, and is provided with a plurality of positioning support ribs 331 on one side thereof, and a fixed separation rib 332 for isolating adjacent magnetic materials 32 on the other side thereof. The positioning support rib 331 includes a positioning rib and a support rib. The positioning rib is relatively long and is used for installation and positioning, and the number thereof is one or more; the support rib is relatively short and is used to support the fixing frame 33 and the magnetic material. The number of the fixed separation ribs 332 is determined according to the number of magnetic materials, and its main function is to separate adjacent magnetic materials 32 for easy installation. The widths of the fixed dividing ribs 332 can be the same or different, and their angles correspond to the spacing angles of the magnetic materials 332 , which can be set according to actual requirements. The shapes of the fixed dividing ribs 331 can be rectangular or diamond-shaped, mainly to accommodate and fix the magnetic materials 332 .

[0027] In the brushless DC motor for automobile heat dissipation described in this embodiment, the connection interface 9 between the control and heat dissipation component 1 and the outside is an open standard interface to cope with the diverse requirements of the external connection harness.

[0028] 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 in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the 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.

[0029] 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 brushless DC motor for automobile heat dissipation, comprising a control and heat dissipation component, a stator component and a rotor component, wherein the stator component is fixed to the control and heat dissipation component by bolts, and the rotor component is connected to the control and heat dissipation component by a bearing and can rotate around an axis; characterized in that: The stator assembly comprises an iron core, an upper insulating sleeve, a lower insulating sleeve, and a wire wound on the iron core; the upper insulating sleeve and the lower insulating sleeve are respectively located on both sides of the iron core to completely wrap the iron core so as to insulate and isolate the iron core from the wound wire; the upper insulating sleeve is provided with a conductive seat conductively connected to the control and heat dissipation assembly, the conductive seat is integrally injection-molded with the upper insulating sleeve, and the relative position between the conductive seat and the upper insulating sleeve reaches a final state through installation and riveting; A conductive connecting rod is provided on the contact surface between the control and heat dissipation component and the stator component, one end of which is fixed to the control and heat dissipation component; and the other end is connected to the conductive seat of the stator component; There are multiple conductive seats and conductive connecting rods, which are evenly distributed around the bearing; the conductive connecting rod is a cylindrical rod, and the connection between it and the conductive seat is arranged in a sheet shape; the conductive seat is designed in a "X" shape, and its convex surface is arranged facing the bearing, and the conductive connecting rod is connected to the convex surface of the conductive seat; There are three conductive seats and three conductive connecting rods; the conductive connecting rods and the conductive seats are spot-welded; wire hooks are provided at both ends of the conductive seats for connecting with specific wires; The upper insulating sleeve of the stator assembly is also provided with a guide limiter for guiding the conductive connecting rod to connect with the conductive seat and limiting its position in the circumferential direction.

2. The brushless DC motor for automobile heat dissipation according to claim 1, characterized in that: The restricted channel of the guide limiter is designed to be narrower from wide.

3. The DC brushless motor for automobile heat dissipation according to claim 1, characterized in that: The rotor assembly comprises a rotor housing, a magnetic material and a fixing frame for fixing and mounting the magnetic material; the magnetic material and the fixing frame are both fixed to the inner surface of the rotor housing by glue.

4. The brushless DC motor for automobile heat dissipation according to claim 3, characterized in that: The fixing frame is a circular ring that matches the inner surface of the rotor housing, and is provided with a plurality of positioning support ribs on one side thereof and a fixing separation rib for isolating adjacent magnetic materials on the other side thereof.

5. The brushless DC motor for automobile heat dissipation according to claim 4, characterized in that: The positioning support ribs include positioning ribs and support ribs, the positioning ribs are used for installation and positioning, and the support ribs are used for support; the angle between the fixed separation ribs corresponds to the spacing angle of the magnetic material.

6. The DC brushless motor for automobile heat dissipation according to claim 1, characterized in that: The connection interface between the control and heat dissipation component and the outside is an open standard interface.

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