CN210669708U

CN210669708U - Connection structure of micromotor shell and front end cover

Info

Publication number: CN210669708U
Application number: CN201922305180.5U
Authority: CN
Inventors: 张发强
Original assignee: Guangdong Jiahe Micromotor Co ltd
Current assignee: Guangdong Jiahe Micromotor Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-06-02
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a connecting structure of a micro motor shell and a front end cover; belongs to the technical field of micromotors; the technical key points of the device comprise a shell and a front end cover arranged at the front end of the shell, wherein at least one through hole is arranged at the near end part of one end of the shell close to the front end cover; the front end cover and the shell are fixedly connected with the connecting hole and the internal thread through hole through threads by fastening screws; the utility model aims to provide a connecting structure of a micro motor shell and a front end cover, which has compact structure, can obviously reduce the outer diameter of the micro motor and is convenient to assemble; used for micro-motors.

Description

Connection structure of micromotor shell and front end cover

Technical Field

The utility model relates to a micromotor part connection structure, more specifically say, especially relate to a connection structure of micromotor shell and front end housing.

Background

At present, the front end cover and the shell of the micromotor are connected in two modes, one mode is that connecting lugs extend from the front end cover and the rear end cover respectively, long screws penetrate through the corresponding connecting lugs on the front end cover and the rear end cover to be tightened, the other mode is that a connecting seat is arranged on the shell on the side edge of the front end cover, and then the connecting seat and the connecting lugs are connected through screws. In the two modes, the edges of the front end cover need to be extended to form the connecting lugs, so that the front end cover and the shell are fixed. Because the design of front end cover edge has the engaging lug for its external diameter increases greatly, when the installation, needs great installation cavity or additionally designs corresponding groove body structure in order to hold the engaging lug part. Not only does it result in a larger motor size, but also increases the cost of production.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compact structure, can show and reduce micromotor external diameter and assemble convenient connection structure of micromotor shell and front end housing to the not enough of above-mentioned prior art.

The technical scheme of the utility model is realized like this: a connecting structure of a micromotor shell and a front end cover comprises a shell and the front end cover arranged at the front end of the shell, wherein at least one through hole is arranged at the near end part of one end of the shell close to the front end cover; the front end cover and the shell are fixedly connected with the connecting hole and the internal thread through hole through threads by fastening screws.

In the connection structure of the micromotor shell and the front end cover, the positioning lug is composed of a positioning part matched with the through hole and a connecting part integrally formed with the positioning part; the length of the connecting part is greater than that of the positioning part; the through hole with the same thread is formed in the connecting part.

In the connection structure of the micro-motor shell and the front end cover, the thickened ring with the internal thread is integrally formed on the positioning lug corresponding to one end of the internal thread through hole, which is far away from the front end cover.

In the connecting structure of the micro-motor shell and the front end cover, a tensioning gap is formed between the connecting hole and the internal thread through hole, and the width of the tensioning gap is 2-5 mm.

In the connecting structure of the shell and the front end cover of the micro motor, the end face of the front end cover opposite to the shell is integrally formed with the limiting convex ring, and the outer diameter of the limiting convex ring is adapted to the inner diameter of the shell.

The utility model adopts the above structure after, with the outer connection structure design of original front end housing and shell for the internal connection for micromotor front end external diameter obtains reducing by a wide margin, not only makes the product appearance pleasing to the eye, probably because the external diameter is little, its installation that can adapt to more little household electrical appliances, and can make the volume of little household electrical appliances further reduce.

Drawings

The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention.

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

FIG. 2 is an enlarged partial schematic view at A of FIG. 1;

FIG. 3 is a schematic diagram of the structure of the present embodiment with a novel positioning tab;

fig. 4 is a schematic view of the usage state of the present invention.

In the figure: 1. a housing; 1a, a through hole; 2. a front end cover; 2a, connecting holes; 2b, a limit convex ring; 3. positioning a lug; 3a, an internal thread through hole; 3b, a positioning part; 3c, a connecting part; 3d, thickening rings; 4. and (5) fastening the screw.

Detailed Description

Referring to fig. 1, the utility model discloses a connection structure of micromotor shell and front end housing, including shell 1 and the front end housing 2 of setting at shell 1 front end, integrated into one piece has spacing bulge loop 2b on the relative terminal surface of front end housing 2 and shell 1, and spacing bulge loop 2 b's external diameter suits with shell 1 internal diameter. The limiting convex ring can prevent the front end cover from moving in the radial direction.

At least one through hole 1a is provided at a proximal end portion of the housing 1 near the front cover 2, and in this embodiment, two through holes are provided and arranged opposite to each other in the circumferential direction of the housing. A positioning lug 3 matched with the through hole 1a is arranged in the shell 1, an internal thread through hole 3a is arranged on the positioning lug 3, and a connecting hole 2a corresponding to the internal thread through hole 3a is arranged on the front end cover 2; the front end cover 2 and the shell 1 are fixed with the connecting hole 2a and the internal thread through hole 3a through a fastening screw 4. Due to the effect of the limiting convex ring, only one through hole can be matched with the positioning lug, and the front end cover can be prevented from moving in an axial direction, so that the front end cover and the shell can be fixed.

In order to facilitate the alignment of the front end cover and the shell during assembly and avoid the rotation of the front end cover relative to the shell along the radial direction, the end part of the shell is provided with a limit notch, and the edge of the front end cover is provided with a limit boss matched with the limit notch. During assembly, after the limiting notch corresponds to the limiting boss, the connecting hole corresponds to the internal thread through hole, and the fastening screw is convenient to mount.

In the present embodiment, the positioning lug 3 is composed of a positioning portion 3b adapted to the through hole 1a and a connecting portion 3c integrally formed with the positioning portion 3 b; the length of the connecting part 3c is greater than that of the positioning part 3 b; the female screw through hole 3a is formed in the connecting portion 3 c.

Furthermore, a thickened ring 3d with internal threads is integrally formed on the positioning lug 3 corresponding to one end of the internal thread through hole 3a far away from the front end cover 2. The thickening ring can deepen the depth of the internal thread through hole, so that the fastening screw and the positioning lug are connected more stably.

Further preferably, a tightening gap is formed between the connection hole 2a and the internally threaded through hole 3a, and the width of the tightening gap is 2-5 mm. Through setting up reasonable clearance for the front end housing can be strained in the pulling force effect of fastening screw to the location auricle, makes the assembly firm.

When the positioning lug is installed, the positioning lug is inserted into the through hole and is fixed with the shell through strong magnetic adsorption, so that the connection of the fastening screw and the positioning lug can be conveniently realized.

The above embodiment is the preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention, it is not right to the present invention, which makes the restriction on any form, and any person who knows commonly in the technical field can use the present invention to make the equivalent embodiment of local change or modification without departing from the technical features of the present invention.

Claims

1. A connecting structure of a micromotor shell and a front end cover comprises a shell (1) and the front end cover (2) arranged at the front end of the shell (1), and is characterized in that at least one through hole (1a) is formed in the near end part of one end, close to the front end cover (2), of the shell (1), a positioning lug (3) matched with the through hole (1a) is arranged in the shell (1), an internal thread through hole (3a) is formed in the positioning lug (3), and a connecting hole (2a) corresponding to the internal thread through hole (3a) is formed in the front end cover (2); the front end cover (2) and the shell (1) are fixedly connected with the connecting hole (2a) and the internal thread through hole (3a) through a fastening screw (4).

2. The connecting structure of the micro-motor shell and the front end cover according to claim 1, wherein the positioning lug (3) is composed of a positioning part (3b) adapted to the through hole (1a) and a connecting part (3c) integrally formed with the positioning part (3 b); the length of the connecting part (3c) is greater than that of the positioning part (3 b); the female through hole (3a) is formed in the connecting portion (3 c).

3. The connecting structure of the micro-motor shell and the front end cover according to claim 1 or 2, characterized in that a thickened ring (3d) with internal threads is integrally formed on the positioning lug (3) corresponding to one end of the internal thread through hole (3a) far away from the front end cover (2).

4. The connection structure of the micro-motor housing and the front end cover according to claim 1, characterized in that a tension gap is formed between the connection hole (2a) and the internally threaded through hole (3a), and the width of the tension gap is 2-5 mm.

5. The connecting structure of the micro-motor shell and the front end cover according to claim 1, characterized in that a limiting convex ring (2b) is integrally formed on the end surface of the front end cover (2) opposite to the shell (1), and the outer diameter of the limiting convex ring (2b) is adapted to the inner diameter of the shell (1).