CN212969277U

CN212969277U - High leakproofness micromotor end cover

Info

Publication number: CN212969277U
Application number: CN202021653023.XU
Authority: CN
Inventors: 杨佳平
Original assignee: Quannan Chaoya Technology Co Ltd
Current assignee: Quannan Chaoya Technology Co Ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-04-13
Anticipated expiration: 2030-08-10

Abstract

The utility model relates to a micromotor part field provides a micromotor end cover of high leakproofness. Including the bottom plate, the upper end of bottom plate is being equipped with the round cassette near border department, the lateral wall of cassette is equipped with the multiunit buckle, the bottom plate is equipped with sealed edge in the outside of cassette, sealed edge is stained with waterproof gum, be equipped with the bearing housing in the middle of the upper end of bottom plate, the bottom plate is equipped with the spring housing in the bearing housing both sides, be equipped with compression spring in the spring housing, spring housing sliding connection has the slide bar, the outside fixedly connected with brush contact of slide bar, the top of brush contact is equipped with loudspeaker form brush baffle, the bottom of brush contact all is equipped with binding post, the bottom plate respectively is equipped with a terminal near binding post department, the bottom. The utility model has the advantages that: the design of a wiring port is omitted, so that the sealing performance of the end cover is improved; the elastic contact of the electric brush contact piece is cancelled, and the contact stability of the electric brush contact piece and the commutator is improved.

Description

High leakproofness micromotor end cover

Technical Field

The utility model relates to a micromotor part field, in particular to little motor end cover of high leakproofness.

Background

The power supply terminal of the micromotor is generally arranged on the end cover, the electric connection between the coil and the terminal of the rotor of the micromotor generally comprises a commutator and an electric brush structure, the commutator is arranged on a rotating shaft of the rotor, the two electric brushes are arranged on the end cover, the commutator is connected with the coil of the rotor, the two electric brushes are respectively connected with the power supply terminal, and the coil of the rotor is connected with an external power supply through the contact matching between the two electric brushes and the commutator. In the prior art, a power line connected with a brush is passed through a through hole formed in an end cap, and the power line enters and exits from the through hole. The presence of the through hole affects the sealing of the end cap.

The stability of the operation of the micro-machine depends on the degree of cooperation between the commutator and the two brushes. In the prior art, a certain included angle is formed between two electric brush contact pieces, the two electric brush contact pieces are clamped towards the middle, and clamping force towards the middle is generated on a commutator, so that the contact pieces of the two electric brushes are tightly matched with the commutator. However, in the prior art, the commutator is mainly clamped by the elastic force formed by bending the brush contact, and the brush contact can be fatigued after a long time, so that the clamping force is insufficient, and the performance of the motor is finally influenced.

Meanwhile, the micro motor is used in all aspects of daily life, such as electric toothbrushes, toys, wall breaking machines and the like, so that the micro motor is known to work in a liquid environment sometimes. This requires waterproofing of the micro motor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a little motor end cover of high leakproofness, mainly used solve the problem that power connection mouth department leakproofness is not enough to and solve the brush contact and easily appear mechanical fatigue, lead to the problem that the clamping force is not enough, solve the waterproof leakproofness problem of micro motor simultaneously.

The above technical problem of the present invention can be solved by the following technical solutions: the electric heating wire clamp comprises a base plate, the upper end of bottom plate is being equipped with the round cassette near border department, the lateral wall of cassette is equipped with the multiunit buckle, the bottom plate is in the outside of cassette is equipped with sealed edge, sealed edge is last to be stained with waterproof gum, be equipped with the bearing housing in the middle of the upper end of bottom plate, the bottom plate is in the bearing housing both sides are equipped with the spring housing, be equipped with compression spring in the spring housing, spring housing sliding connection has the slide bar, the outside fixedly connected with brush contact of slide bar, the top of brush contact is equipped with loudspeaker form brush baffle, the bottom of brush contact all is equipped with binding post, the bottom plate is being close to binding post department respectively is equipped with a terminal, the bottom of terminal passes the.

Preferably, the posts are copper posts to achieve electrical conduction.

Preferably, the bottom plate is made of plastic, and the binding posts are fixed on the bottom plate through hot riveting and welding. The sealing performance of the connection part of the binding post and the bottom plate is ensured.

Preferably, the waterproof back adhesive double-sided tape adhesive.

The utility model has the advantages that: the design of a wiring port is omitted, so that the sealing performance of the end cover is improved; the elastic contact of the electric brush contact piece is cancelled, and the contact stability of the electric brush contact piece and the commutator is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a left side view of the present invention;

fig. 4 is a schematic cross-sectional view of the present invention;

the notation in the figure is: 1. the novel electric brush comprises a base plate, 2 parts of a clamping seat, 3 parts of a buckle, 4 parts of a sealing edge, 5 parts of waterproof gum, 6 parts of a bearing sleeve, 7 parts of an electric brush contact piece, 701 parts of an electric brush guide plate, 8 parts of a wiring terminal, 9 parts of a sliding rod, 10 parts of a spring sleeve, 11 parts of a wiring terminal and 12 parts of a compression spring.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): the high-sealing-performance micromotor end cover comprises a base plate 1, a circle of clamping seat 2 is arranged at the position, close to the edge, of the upper end of the base plate 1, a plurality of groups of buckles 3 are arranged on the outer side wall of the clamping seat 2, a sealing edge 4 is arranged on the outer side of the base plate 1 in the clamping seat 2, waterproof gum 5 with double-faced glue is adhered to the sealing edge 4, a bearing sleeve 6 is arranged in the middle of the upper end of the base plate 1, spring sleeves 10 are arranged on two sides of the bearing sleeve 6 of the base plate 1, compression springs 12 are arranged in the spring sleeves 10, slide rods 9 are slidably connected with the spring sleeves 10, electric brush contact blades 7 are fixedly connected to the outer sides of the slide rods 9, horn-shaped electric brushes 701 are arranged at the top ends of the electric brush contact blades 7, connecting terminals 8 are arranged at the bottoms of the electric brush contact blades. Wherein the posts 11 are copper posts to achieve electrical conduction.

Wherein, bottom plate 1 is the plastics material, and terminal 11 is fixed in bottom plate 1 through the hot riveting welding. The sealing performance of the joint of the binding post 11 and the bottom plate 1 is ensured.

Before the electric brush contact 7 is not installed in the commutator, the compression spring 12 in a compressed state pushes the sliding rod 9 to move towards the bearing sleeve 6, so that the electric brush contact 7 moves towards the bearing sleeve 6 and finally contacts with the outer side of the bearing sleeve 6 to stop moving.

When the end cover of the micro-motor of the embodiment is installed and used, the rotating shaft on the rotor is embedded into the bearing sleeve 6, and the commutator on the rotor is firstly contacted with the brush guide plate 701 and continuously moves to the brush contact plate 7. At this time, since the outer diameter of the commutator is larger than that of the brush contact 7 in the closed state, the brush contact 7 is moved outward, and the slide rod 9 is compressed by the compression spring 12. And the further compression of the compression spring 12 will produce a greater spring force and thereby increase the gripping force of the brush contact 7 against the commutator. Meanwhile, the clamping seat 2 is also continuously inserted into the shell of the micromotor, and the clamping buckle 3 on the side wall of the clamping seat 2 is fixed on the shell, so that screw installation is avoided, and the mounting is convenient and fast. And waterproof gum 5 is the two-sided tape glue, and the installation is in place at the end cover, and waterproof gum 5's upper surface also can with the casing adhesion to guarantee effectual waterproof performance.

The embodiment of the present invention is to those skilled in the art, based on the application method and principle disclosed in the present invention, various modifications or variations can be easily made, and not limited to the structure described in the above embodiments of the present invention, therefore, the above described manner is only a preferred embodiment, and not a restrictive meaning, and all equivalent changes and modifications made according to the present invention are within the scope of the claims of the present invention.

Claims

1. A high-sealing-performance micromotor end cover comprises a bottom plate (1) and is characterized in that a circle of clamping seat (2) is arranged at the position, close to the edge, of the upper end of the bottom plate (1), a plurality of groups of buckles (3) are arranged on the outer side of the clamping seat (2), a sealing edge (4) is arranged on the outer side of the bottom plate (1), waterproof gum (5) is adhered to the sealing edge (4), a bearing sleeve (6) is arranged in the middle of the upper end of the bottom plate (1), spring sleeves (10) are arranged on the two sides of the bearing sleeve (6) of the bottom plate (1), a compression spring (12) is arranged in each spring sleeve (10), a sliding rod (9) is connected to each spring sleeve (10) in a sliding mode, an electric brush contact piece (7) is fixedly connected to the outer side of each sliding rod (9), a horn-shaped electric brush guide plate (701) is arranged at the top end of each electric brush contact piece, the bottom plate (1) is close to the wiring terminal (8) and is respectively provided with a wiring terminal (11), and the bottom end of the wiring terminal (11) penetrates through the bottom plate (1).

2. A highly hermetic micromotor end cap according to claim 1, characterized in that said terminals (11) are copper cylinders.

3. The micromotor end cover with high sealing performance according to claim 1, wherein the bottom plate (1) is made of plastic, and the binding posts (11) are fixed on the bottom plate (1) through hot rivet welding.

4. The micromotor end cap with high sealing performance according to claim 1, characterized in that the waterproof back adhesive (5) is double-faced with adhesive.