Micro motor capable of enhancing heat dissipation

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a micro motor capable of enhancing heat dissipation, which comprises a casing, a stator and a rotor, the casing comprises a first casing and a second casing which are detachably connected, one end of the rotor close to the second casing penetrates through the second casing to form a motor output end, and fan blades capable of synchronously rotating along with the rotor are arranged on the rotor. Wherein a first air opening is formed in the axial inner wall of the first shell, a second air opening is formed in the radial inner wall of the second shell, an annular guide plate is installed in the second shell, and the annular guide plate is used for guiding air flow, facing the annular guide plate, generated by the fan blades to the second air opening; by installing an annular guide plate, axial air flow generated by fan blades can be guided to a second air opening formed in the radial direction, it is avoided that disordered air flow is generated, the heat dissipation effect is affected, hot air flow is prevented from making direct contact with the axial inner wall of a second shell, and heat of hot air is prevented from being conducted to one side of the output end of a motor; and the influence on elements connected to the output end of the motor is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field especially relates to a micro motor of enhanced heat dissipation. BACKGROUND

[0002] The micro motor is usually a small volume motor, also called micro motor or micro motor, which is applied to various fields, and the performance requirements of the micro motor are usually different due to different application fields, especially the micro motor applied to the engine, because the working environment usually has high temperature, which can easily affect the performance and service life of the micro motor.

[0003] As disclosed in Chinese patent application No. (2024200121397), a heat dissipation structure of a micro motor, a fan blade is arranged in the inside of the casing, and an air inlet is formed on the casing, the rotation of the rotor drives the rotation of the fan blade, thereby increasing the air circulation inside and outside the casing, and enhancing the heat dissipation effect of the micro motor, but the air flow generated by the fan blade is usually axial flow, the cavity is formed on the radial surface of the motor top cover, on the one hand, the air flow in the motor top cover is easy to produce turbulence, affecting the air circulation inside and outside the casing, on the other hand, the air flow is easy to blow to the output end direction of the micro motor, which can easily cause the temperature of the output end side of the micro motor to be too high, affect the performance of the micro motor, and accelerate the wear and aging of the elements connected to the output end of the micro motor, and shorten the service life. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above-mentioned technical problem, provides a micro motor of enhanced heat dissipation, which can enhance the heat dissipation effect of the micro motor, and can guide the air flow generated by the fan blade well, avoiding negative effects.

[0005] Therefore, the utility model provides a micro motor of enhanced heat dissipation, which comprises:

[0006] The casing comprises a first shell and a second shell which can be detachably connected;

[0007] The stator is installed on the inner wall of the first shell;

[0008] The rotor is installed in the first shell and corresponds to the stator, and one end close to the second shell penetrates the second shell to form a motor output end;

[0009] The fan blade is installed in the second shell and is sleeved on the rotor and can rotate synchronously with the rotor;

[0010] The first housing has a first air vent on its axial inner wall, and the second housing has a second air vent on its radial inner wall. An annular guide plate is installed inside the second housing and is used to guide the airflow generated by the fan blades toward the annular guide plate to the second air vent.

[0011] In the above technical solution, further:

[0012] The surface of the annular guide plate is arc-shaped and is detachably connected to the second housing.

[0013] In the above technical solution, further:

[0014] A heat insulation cavity is formed between the annular guide plate and the inner wall of the second housing along the axial direction.

[0015] In the above technical solution, further:

[0016] The annular guide plate includes a first connecting part for connecting to the inner wall of the second housing, a guide part for guiding the airflow, and a baffle part for preventing the airflow from entering the heat insulation cavity.

[0017] Furthermore, the above technical solution also includes:

[0018] The grille is installed on the first housing at the first air vent.

[0019] A breathable mesh is installed on the second housing at the second air vent.

[0020] In the above technical solution, further:

[0021] The rotor includes a rotor shaft and a coil sleeved on the rotor shaft, and the fan blades are sleeved on the rotor shaft, with a stepped platform formed on the surface of the rotor shaft where the fan blades are located.

[0022] The stepped platform has external threads, and the fan blades are fixed to the stepped platform on the rotor shaft surface by nuts.

[0023] In the above technical solution, further:

[0024] The first housing has multiple snap-fit ​​holes around its circumference, and the second housing has multiple snaps that are adapted to the multiple snap-fit ​​holes respectively.

[0025] Multiple buckle holes and buckle circumferences are evenly spaced.

[0026] In the above technical solution, further:

[0027] The first housing has multiple snap-fit ​​holes around its circumference, and the second housing has multiple snaps that are adapted to the multiple snap-fit ​​holes respectively.

[0028] Multiple buckle holes and buckles are evenly spaced on the circumference.

[0029] The utility model discloses the beneficial effect is:

[0030] 1. install annular guide plate in the second casing, one aspect with the axial wind flow that the fan blade produced can be effectively guided radial opening second air port on the second casing surface, avoid producing disorderly wind flow, influence radiating effect, another aspect can avoid hot air wind flow direct contact the axial inner wall of second casing, avoid the heat of hot air conduction to motor output end side, avoid the influence to the element connected on motor output end;

[0031] 2. the heat insulation cavity that forms between annular guide plate and the inner wall of second casing axial can further improve the heat insulation effect, avoid hot air wind flow to the influence of motor output end;

[0032] 3. through the grating and the air permeable net can play the effect of filtration to the airflow that enters the casing, reduce the influence that dust enters to the micro motor;

[0033] 4. through the buckle hole on the first casing and the buckle on the second casing, the convenience of the connection between the first casing and the second casing is convenient, and the establishment of the guide groove on the inner wall of the first casing can further improve the convenience and precision of the connection of the first casing and the second casing, guarantee the product quality of micro motor. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is the structure schematic diagram of the utility model;

[0035] Figure 2 It is the side view of the utility model;

[0036] Figure 3 It is the utility model Figure 2 A-A place's section view in;

[0037] Figure 4 It is the utility model's explosion view;

[0038] Marked in the drawing is: 1, the first casing;2, the second casing;3, stator;4, rotor;40, rotor shaft;41, coil;42, step stage;5, motor output end;6, fan blade;7, first air port;8, second air port;9, annular guide plate;90, first connecting part;91, guide part;92, flow blocking part;10, heat insulation cavity;11, grating;12, air permeable net;13, nut;14, buckle hole;15, buckle;16, guide groove. DETAILED DESCRIPTION

[0039] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0040] Embodiment 1

[0041] The embodiment provides a micro motor with enhanced heat dissipation, comprising:

[0042] A shell comprising a first shell 1 and a second shell 2 connected detachably;

[0043] A stator 3 mounted on the inner wall of the first shell 1;

[0044] A rotor 4 mounted in the first shell 1 and arranged corresponding to the stator 3, and an end close to the second shell 2 penetrates through the second shell 2 to form a motor output end 5;

[0045] A fan blade 6 mounted in the second shell 2 and sleeved on the rotor 4 and capable of rotating synchronously with the rotor 4;

[0046] The first shell 1 is provided with a first air port 7 on the inner wall in the axial direction, the second shell 2 is provided with a second air port 8 on the inner wall in the radial direction, and an annular guide plate 9 is mounted in the second shell 2 and used to guide the air flow generated by the fan blade 6 towards the annular guide plate 9 to the second air port 8;

[0047] Meanwhile, the annular guide plate 9 can be made of a material with high temperature resistance and poor heat conduction effect, such as polyether ether ketone material.

[0048] It can be seen from the embodiment that, by mounting the annular guide plate 9 in the second shell 2, on the one hand, the axial air flow generated by the fan blade 6 can be effectively guided to the second air port 8 provided on the surface of the second shell 2 in the radial direction, so as to avoid the turbulent air flow and affect the heat dissipation effect, and on the other hand, the hot air flow can be prevented from directly contacting the axial inner wall of the second shell 2, so as to prevent the heat of the hot air from being conducted to the side of the motor output end 5 and affecting the elements connected to the motor output end 5.

[0049] Meanwhile, the micro motor has forward rotation and reverse rotation, the first air port 7 and the second air port 8 are provided, so that no matter the micro motor rotates forward or reversely, the axial air flow generated in different directions can flow in and out of the shell of the micro motor, the heat dissipation effect is enhanced, when the air flow blows towards the annular guide plate 9, the turbulent air flow can be effectively avoided, the heat dissipation effect is affected, and the heat is prevented from being conducted to the motor output end 5, when the air flow is reversed, the stability of the air flow entering the shell from the second air port 8 can be improved, the turbulent air flow is avoided, and the heat dissipation effect is ensured.

[0050] Embodiment 2:

[0051] The embodiment provides a micro motor with enhanced heat dissipation, in addition to the technical scheme of the above embodiment, and has the following technical features:

[0052] The surface of the annular guide plate 9 is arc-shaped, and the annular guide plate 9 is detachably connected with the second shell 2.

[0053] It can be seen from the embodiment that by arranging the surface of the annular guide plate 9 to be arc-shaped, the turbulence and vortex of the air flow can be reduced, the guiding property and stability can be improved, the resistance of the air flow can be reduced, and the air circulation efficiency inside and outside the shell can be improved.

[0054] Embodiment 3:

[0055] The embodiment provides a micro motor with enhanced heat dissipation, in addition to the technical scheme of the above embodiment, and has the following technical features:

[0056] The annular guide plate 9 and the inner wall of the second shell 2 in the axial direction form a heat insulation cavity 10.

[0057] It can be seen from the embodiment that by arranging the annular guide plate 9 and the inner wall of the second shell 2 in the axial direction to form the heat insulation cavity 10, the heat insulation effect can be further improved, and the hot air flow can be prevented from affecting the motor output end 5.

[0058] Embodiment 4:

[0059] The embodiment provides a micro motor with enhanced heat dissipation, in addition to the technical scheme of the above embodiment, and has the following technical features:

[0060] The annular guide plate 9 comprises a first connecting portion 90 for connecting with the inner wall of the second shell 2, a guide portion 91 for guiding the air flow, and a flow blocking portion 92 for preventing the air flow from entering the heat insulation cavity 10.

[0061] The first connecting portion 90, the guide portion 91 and the flow blocking portion 92 are in an integrated structure.

[0062] It can be seen from the embodiment that the first connecting portion 90 is arranged to facilitate the fixation of the annular guide plate 9 and the second shell 2, the flow blocking portion 92 can minimize the hot air entering the heat insulation cavity 10, thereby avoiding the hot air flow directly contacting the inner wall of the second shell 2 in the axial direction, avoiding the heat of the hot air conducting to the side of the motor output end 5, and avoiding affecting the elements connected to the motor output end 5.

[0063] In addition, a plurality of mounting holes are arranged on the first connecting portion 90 in the circumferential direction, and the first connecting portion 90 is fixedly connected with the second shell 2 through bolts.

[0064] Embodiment 5:

[0065] The embodiment provides a micro motor with enhanced heat dissipation, in addition to the technical scheme of the above embodiment, further comprising the following technical features.

[0066] The grid 11 is installed at the first air inlet 7 of the first shell 1.

[0067] The air-permeable net 12 is installed at the second air inlet 8 of the second shell 2.

[0068] The grid 11 can be in an integrated structure with the first shell 1, and the air-permeable net 12 can be connected to the second shell 2 by adhesion.

[0069] It can be seen that the grid 11 and the air-permeable net 12 can filter the airflow entering the shell, reducing the influence of dust on the micro motor.

[0070] The second air inlet 8 is arranged in a circle, and a plurality of sub-air inlets are arranged, that is, a support rod is arranged between two adjacent sub-air inlets, so that the structural strength of the second shell 2 at the second air inlet 8 is effectively improved while the air volume of the second air inlet 8 is ensured.

[0071] Embodiment 6

[0072] The embodiment provides a micro motor with enhanced heat dissipation, in addition to the technical scheme of the above embodiment, further comprising the following technical features.

[0073] The rotor 4 comprises a rotor 4 shaft and a coil 41 sleeved on the rotor 4 shaft, and the fan blade 6 is sleeved on the rotor 4 shaft, and a stepped platform 42 is arranged on the surface of the rotor 4 shaft at the fan blade 6.

[0074] The stepped platform 42 is provided with an external thread, and the fan blade 6 is fixed on the stepped platform 42 of the surface of the rotor 4 shaft by the nut 13.

[0075] It can be seen that the stepped platform 42 is provided with an external thread, and the fan blade 6 is fixed by the nut 13, which improves the convenience and facilitates manufacturing. Meanwhile, after the fan blade 6 is sleeved on the rotor 4 shaft, the fan blade 6 and the rotor 4 shaft are fixedly connected by the nut 13 on one side, further improving the installation convenience.

[0076] Embodiment 7

[0077] The embodiment provides a micro motor with enhanced heat dissipation, in addition to the technical scheme of the above embodiment, further comprising the following technical features.

[0078] A plurality of buckle holes 14 are arranged on the circumference of the first shell 1, and a plurality of buckles 15 are arranged on the second shell 2 and adapted to the plurality of buckle holes 14.

[0079] The plurality of buckle holes 14 and the plurality of buckles 15 are arranged at equal intervals on the circumference.

[0080] Meanwhile, the buckle 15 and the second shell 2 can be welded.

[0081] It can be seen from the embodiment that the buckle holes 14 on the first shell 1 and the buckles 15 on the second shell 2 facilitate the connection between the first shell 1 and the second shell 2.

[0082] The plurality of buckle holes 14 and the plurality of buckles 15 arranged at equal intervals on the circumference can improve the stability of the connection between the first shell 1 and the second shell 2.

[0083] Embodiment 8

[0084] The embodiment provides a micro motor with enhanced heat dissipation, in addition to the technical solutions of the above embodiments, and has the following technical features.

[0085] The first shell 1 has a guide groove 16 axially arranged on the inner wall, and the guide groove 16 is in communication with the buckle hole 14 on one side and in an open state on the other side.

[0086] It can be seen from the embodiment that the arrangement of the guide groove 16 on the inner wall of the first shell 1 can further improve the convenience and precision of the connection between the first shell 1 and the second shell 2, and ensure the product quality of the micro motor.

[0087] The embodiments of the present application are described above in combination with the drawings, and the embodiments and features in the embodiments in the present application can be combined with each other without conflict, and the present application is not limited to the above specific embodiments, which are only illustrative and not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims, and all the forms belong to the protection scope of the present application.

Claims

1. A micro motor enhanced in heat dissipation, characterized by comprising: The application relates to a micro motor with enhanced heat dissipation. The application comprises: a casing, which comprises a first casing (1) and a second casing (2) connected detachably; a stator (3) installed on the inner wall of the first casing (1); a rotor (4) installed in the first casing (1) and arranged correspondingly to the stator (3) and penetrating through the second casing (2) to form a motor output end (5) at one end close to the second casing (2); a fan blade (6) installed in the second casing (2) and sleeved on the rotor (4) and capable of rotating synchronously with the rotor (4); wherein the first casing (1) is provided with a first air port (7) on the inner wall in the axial direction, the second casing (2) is provided with a second air port (8) on the inner wall in the radial direction, and an annular guide plate (9) is installed in the second casing (2) and used for guiding the air flow generated by the fan blade (6) towards the annular guide plate (9) to the second air port (8).

2. The micro motor with enhanced heat dissipation according to claim 1, wherein: the surface of the annular guide plate (9) is arc-shaped, and the annular guide plate (9) is detachably connected with the second casing (2).

3. The micro motor with enhanced heat dissipation according to claim 2, wherein: a heat insulation cavity (10) is formed between the annular guide plate (9) and the inner wall of the second casing (2) in the axial direction.

4. The micro motor with enhanced heat dissipation according to claim 3, wherein:

5. The micro-motor with enhanced heat dissipation of claim 1, wherein, the annular guide plate (9) comprises a first connecting part (90) used for connecting with the inner wall of the second casing (2), a guide part (91) used for guiding the air flow and a flow blocking part (92) used for preventing the air flow from entering the heat insulation cavity (10). The application further comprises: a grid (11) installed on the first casing (1) at the first air port (7); a breathable mesh (12) installed on the second casing (2) at the second air port (8).

6. The micro motor with enhanced heat dissipation according to claim 1, wherein: the rotor (4) comprises a rotor shaft (40) and a coil (41) sleeved on the rotor shaft (40), and the fan blade (6) is sleeved on the rotor shaft (40) and is provided with a stepped platform (42) on the surface of the rotor shaft (40) at the fan blade (6); wherein the stepped platform (42) is provided with external threads, and the fan blade (6) is fixed on the stepped platform (42) on the surface of the rotor shaft (40) by means of a nut (13).

7. The micro motor with enhanced heat dissipation according to claim 1, wherein: a plurality of buckle holes (14) are circumferentially formed on the first casing (1), and a plurality of buckles (15) are provided on the second casing (2) and adapted to the plurality of buckle holes (14) respectively; wherein the plurality of buckle holes (14) and buckles (15) are equally spaced in the circumferential direction.

8. The micro motor with enhanced heat dissipation according to claim 7, wherein: a guide groove (16) is axially formed on the inner wall of the first casing (1), and the guide groove (16) is in communication with the buckle hole (14) on one side and is in an open state on the other side.

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