Anti-interference brushless micromotor

Abstract

The utility model discloses an anti-interference brushless micromotor, which comprises a main shell and a rear end cover, a shielding sleeve is tightly attached and sleeved outside the main shell, the inner wall of the front end cover of the main shell and the inner wall of the rear end cover of the main shell are coated with shielding coatings, the outer wall of the main shell is provided with a plurality of convex ribs parallel to the axial direction of the main shell along the circumferential direction, and the convex ribs are arranged on the outer wall of the main shell along the circumferential direction. The inner wall of the shielding sleeve is provided with a plurality of strip grooves in one-to-one correspondence with the protruding ribs in the circumferential direction, and the protruding ribs are clamped into the strip grooves. According to the utility model, the shielding coating is arranged to prevent electromagnetic interference from the inside of the motor shell, the shielding sleeve is arranged to prevent electromagnetic interference from the outside of the motor shell, the internal and external dual anti-interference effect is realized, the shielding sleeve can protect the motor shell, so that the motor shell is not easy to deform due to compression, and meanwhile, the motor shell is not easy to deform due to compression. And the arranged convex ribs not only can improve the strength of the main shell, but also can limit the shielding sleeve to prevent the shielding sleeve from deviating and shifting.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of micro motor, especially an anti-interference brushless micro motor. BACKGROUND

[0002] The brushless micro motor is also called brushless direct current micro motor, and is a mechatronic product without brush and commutator, which is simple in structure and convenient to operate.

[0003] The existing brushless micro motor is usually made thin in size, and the thin shell is difficult to effectively prevent electromagnetic interference and reduce noise, and is prone to deformation.

[0004] Therefore, the anti-interference brushless micro motor is provided to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an anti-interference brushless micro motor to solve the problems in the background art.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] An anti-interference brushless micro motor comprises a main shell and a rear end cover, a shielding sleeve is tightly sleeved outside the main shell, shielding coating is applied to the inner walls of the front end cover and the rear end cover of the main shell, a plurality of convex ribs parallel to the axial direction of the main shell are arranged on the outer wall of the main shell in the circumferential direction, a plurality of strip grooves corresponding to the convex ribs are arranged on the inner wall of the shielding sleeve in the circumferential direction, and the convex ribs are clamped into the strip grooves.

[0008] In a further embodiment, a ring groove is further formed in the outer wall of the main shell.

[0009] In a further embodiment, a convex ring corresponding to the ring groove is arranged at the front end of the shielding sleeve, and the convex ring is clamped into the ring groove.

[0010] In a further embodiment, the front end of the strip groove penetrates the convex ring.

[0011] In a further embodiment, a folding part is arranged at the rear end of the shielding sleeve, and the folding part is attached to the outer wall of the rear end cover.

[0012] In a further embodiment, the shielding sleeve is made of conductive rubber, and the conductive rubber is uniformly distributed with conductive particles.

[0013] In a further embodiment, the shielding coating is made of epoxy resin paint containing conductive particles.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] The utility model discloses a shielding coating is set up from the motor casing and prevents electromagnetic interference, and the shielding sleeve set up can prevent electromagnetic interference from the motor casing outside, realize the effect of double anti -interference of inside and outside, and the shielding sleeve can protect the motor casing, make it not easy to be pressed and deformed, simultaneously, the boss set up not only can improve the strength of main casing, can also position limiting to the shielding sleeve, prevent its deflection displacement. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the utility model structure schematic drawing;

[0017] Figure 2 It is the utility model half cut structure schematic drawing;

[0018] Figure 3 It is the utility model main casing structure schematic drawing;

[0019] Figure 4 It is the utility model shielding sleeve front view structure schematic drawing;

[0020] Figure 5 It is the utility model shielding sleeve rear view structure schematic drawing.

[0021] In the drawing: 1, main casing;11, boss;12, ring groove;2, rear end cover;3, shielding sleeve;31, strip slot;32, gather part;33, boss ring;4, shielding coating. DETAILED DESCRIPTION

[0022] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected;Can be mechanical connection, can also be electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Please refer to Figures 1-5 A kind of anti-interference brushless micromotor, including main casing 1 and rear end cover 2, main casing 1 and rear end cover 2 are connected by bolt fixedly between, and bolt does not protrude from the outer wall of shell, the output shaft of motor one end penetrates the front end of main casing 1, and is connected with the front end cover of main casing 1 by bearing, the other end of motor output shaft is installed together with rear end cover 2 by bearing, the main section of motor output shaft is installed with rotor, and stator is installed on the inner wall of the middle section of main casing 1.

[0026] Shielding sleeve 3 is tightly sleeved outside main casing 1, the material of shielding sleeve 3 is conductive rubber, and conductive rubber is uniformly distributed with conductive particles, and the conductive particles can be used, but not limited to glass silver plating, aluminum silver plating etc., so that it not only has electromagnetic shielding effect, improves the anti-interference ability of motor, but also can protect motor shell by the flexible characteristics of rubber, so that it is not easy to be pressed to deform, the inner wall of the front end cover of main casing 1 and the inner wall of rear end cover 2 are all brushed with shielding coating 4, shielding coating 4 is brushed by epoxy resin coating containing conductive particles, to facilitate the anti-electromagnetic interference in motor shell.

[0027] In order to improve the firmness of shielding sleeve 3 installation, the outer wall of main casing 1 is provided with a plurality of convex ribs 11 parallel to the axial direction of main casing 1, and the inner wall of shielding sleeve 3 is provided with a plurality of strip grooves 31 corresponding to convex ribs 11, convex ribs 11 are inserted into strip grooves 31, so as to limit shielding sleeve 3, prevent it from deflecting, and convex ribs 11 can also improve the strength of motor shell.

[0028] Further, the outer wall of main casing 1 is also provided with a ring groove 12, the front end of shielding sleeve 3 is provided with a convex ring 33 corresponding to ring groove 12, and the convex ring 33 is inserted into the ring groove 12, so as to limit the front end of shielding sleeve 3, prevent it from moving out of the motor shell along the axial direction.

[0029] The rear end of shielding sleeve 3 is provided with a folding part 32, and the folding part 32 is fitted with the outer wall of rear end cover 2, which can avoid the shielding sleeve 3 from moving out of the motor shell along the axial direction.

[0030] The front end of strip groove 31 penetrates convex ring 33, and then convex rib 11 is introduced into strip groove 31 along the front end of strip groove 31 on convex ring 33.

[0031] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but that the application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments should, therefore, be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalents of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the scope of the claims concerned.

[0032] Furthermore, it should be understood that although the present specification describes exemplary embodiments, the application is not limited to only one independent technical solution in each embodiment, and the specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. An anti-interference brushless micro motor, comprising a main housing (1) and a rear end cover (2), characterized in that: The main housing (1) is tightly fitted with a shielding sleeve (3), and the inner wall of the front end cover and the inner wall of the rear end cover (2) of the main housing (1) are coated with a shielding coating (4). The outer wall of the main housing (1) is provided with several ribs (11) parallel to the axial direction of the main housing (1) along the circumferential direction, and the inner wall of the shielding sleeve (3) is provided with several grooves (31) corresponding to the ribs (11) along the circumferential direction. The ribs (11) are inserted into the grooves (31).

2. The anti-interference brushless micro motor according to claim 1, characterized in that: The outer wall of the main housing (1) is also provided with an annular groove (12).

3. The anti-interference brushless micro motor according to claim 2, characterized in that: The front port of the shielding sleeve (3) is provided with a protruding ring (33) corresponding to the annular groove (12), and the protruding ring (33) is inserted into the annular groove (12).

4. The anti-interference brushless micro motor according to claim 3, characterized in that: The front end of the groove (31) passes through the protruding ring (33).

5. The anti-interference brushless micro motor according to claim 1, characterized in that: The shielding sleeve (3) has a folding part (32) at its rear end, and the folding part (32) is in contact with the outer wall of the rear end cover (2).

6. The anti-interference brushless micro motor according to claim 1, characterized in that: The shielding sleeve (3) is made of conductive rubber, and conductive particles are evenly distributed inside the conductive rubber.

7. The anti-interference brushless micro motor according to claim 1, characterized in that: The shielding coating (4) is formed by applying an epoxy resin coating containing conductive particles.

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