CN111864959A

CN111864959A - Rear cover structure of diaphragm pump motor

Info

Publication number: CN111864959A
Application number: CN202010702149.XA
Authority: CN
Inventors: 卢连苗; 卢勃; 杨军明; 陈建荣; 劳科奇
Original assignee: Nningbo Qiangsheng Electric Motor Co ltd
Current assignee: Nningbo Qiangsheng Electric Motor Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2020-10-30

Abstract

The invention discloses a rear cover structure of a motor of a diaphragm pump, which comprises a rear cover and a carbon brush holder, wherein a fastening groove is formed in the rear cover; protruding ends matched with the buckle grooves in shape are arranged at the two ends of the carbon brush holder, and the protruding ends are arranged in the buckle grooves; when the rear cover is fixed with the motor main shell, the carbon brush holder is pressed between the motor main shell and the rear cover. According to the rear cover of the motor of the diaphragm pump, the protruding ends arranged at the two ends of the carbon brush holder are tightly pressed between the main shell of the motor and the rear cover, so that the carbon brush holder and the rear cover are fixed. Therefore, fasteners such as screws and the like are not needed to be screwed on the carbon brush holder to realize the fixation of the two parts; and the sealing performance of the rear cover is improved due to the omission of the fastening piece.

Description

Rear cover structure of diaphragm pump motor

Technical Field

The invention relates to the technical field of diaphragm pump motors, in particular to a rear cover structure of a diaphragm pump motor.

Background

Referring to fig. 1, a brush holder structure 1 in a rear cover of a motor of a conventional diaphragm pump is connected with a rear cover 2 by fasteners such as screws or rivets. The position of the rear cover of the motor has two positions which are the highest point of the temperature of the motor, one is the position of the electric brush, and the other is the position of the bearing, and the high temperature of the bearing is mainly caused by the conduction of the rotor iron core. When the rear cover is made of plastic, the heat inside the motor cannot be quickly dissipated due to poor heat conduction of the plastic, the temperature of the motor is quickly increased, the requirement on the used materials of the motor is higher due to high temperature, or the motor performance is changed, and the like, so that the motor cost is greatly increased.

To the above-mentioned problem, more companies can use the structure of lid body and plastics brush yoke in combination through the metal now, and the heat of lid department will fall through the quick heat dissipation of lid behind the metal like this. However, this construction also has disadvantages:

1) the screw hole adopts a self-tapping mode, has higher requirements on the aperture, the size of the screw, the button force and the like, and is easy to have the defects of tooth slipping, insufficient screw fastening and the like.

2) When the machine-tooth screw is used, the rear cover needs to be subjected to post-processing tapping, and the tapping of the screw tap cannot tap the bottommost hole, for example, a hole with the height of 10mm, and the tapping is about 7 mm. In addition, the tapping can cause the generation of inferior-quality products and low production efficiency, and the manufacturing cost of products is improved. Meanwhile, the risk of improper assembly of the product is also improved, and the problem of improper assembly can cause the defects of abnormal noise, shortened service life, even machine burning, no work and the like of the motor.

In addition, due to the particularity of the working environment of the booster pump for the water purifier, the booster diaphragm pump is required to meet the IPX 4-level waterproof requirement at least, so that the motor part of the pump also needs to be designed in a sealing mode, and ventilation design like some motors cannot be realized.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a rear cover structure of a motor of a diaphragm pump.

The invention is realized by the following technical scheme: a diaphragm pump motor rear cover structure comprising:

the rear cover is provided with a buckling groove;

the carbon brush holder comprises two carbon brush sliding grooves for accommodating carbon brushes, protruding ends matched with the buckling grooves in shape are arranged at two ends of the carbon brush holder, and the protruding ends are arranged in the buckling grooves;

the carbon brush is arranged in the carbon brush sliding groove in a sliding mode, the carbon brush is connected with a lead wire for supplying current to the carbon brush, and one end of the carbon brush is provided with a spring for applying elastic pressure to the end of the carbon brush;

when the rear cover is fixed with the motor main shell, the carbon brush holder is pressed between the motor main shell and the rear cover.

In the technical scheme, the rear cover comprises a ring of annular wall arranged on the edge of the rear cover, the upper end face of the protruding end is flush with the upper end face of the annular wall, and when the rear cover is fixed with the main motor shell, the lower end face of the main motor shell is abutted against the upper end face of the annular wall and the upper end face of the protruding end.

In the above technical solution, one side of the upper end surface of the protruding end extends laterally to form a flange, a step is correspondingly formed on the inner side of the annular wall of the rear cover, and the flange is erected on the step.

In the technical scheme, a sealing ring is arranged on the end face of the protruding end, a limiting groove is formed in the rear cover, the sealing ring is located in the limiting groove, and when the rear cover is fixed with the motor main shell, the lower end face of the motor main shell is abutted to the sealing ring.

In the technical scheme, the rear cover is provided with the positioning bulge, and the lower end face of the carbon brush holder is correspondingly provided with the positioning hole matched with the positioning bulge.

In the above technical scheme, the carbon brush chute and the carbon brush holder are integrally formed.

In the technical scheme, a wire pressing groove is formed in one side of the carbon brush sliding groove, and the lead wire passes through the wire pressing groove.

In the above technical scheme, the wire pressing groove and the carbon brush holder are integrally formed.

In the technical scheme, the rear end of the carbon brush sliding groove is an opening, the two sides of the opening are provided with the fins, and the end covers for closing the opening are inserted on the fins.

In the technical scheme, the end cover is provided with the spring seat used for limiting one end of the spring.

The invention has the following beneficial effects: according to the rear cover of the motor of the diaphragm pump, the protruding ends arranged at the two ends of the carbon brush holder are tightly pressed between the main shell of the motor and the rear cover, so that the carbon brush holder and the rear cover are fixed. Therefore, fasteners such as screws and the like are not needed to be screwed on the carbon brush holder to realize the fixation of the two parts; and due to the omission of fasteners.

Drawings

Fig. 1 is a schematic structural diagram of a rear cover of a motor of a diaphragm pump in the background art.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a schematic perspective view of a carbon brush holder.

Fig. 4 is a schematic perspective view of the carbon brush holder in another direction.

Fig. 5 is a schematic perspective view of the rear cover.

Fig. 6 is a perspective view of the end cap.

Fig. 7 is a schematic cross-sectional view of the motor main housing and the rear cover when they are fixed.

Fig. 8 is a partial enlarged view of a portion a in fig. 7.

Fig. 9 is a schematic structural diagram of another embodiment of the present invention.

Fig. 10 is an exploded view of another embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings: example 1: referring to fig. 2 to 8, including: a diaphragm pump motor rear cover structure comprises a rear cover 1, wherein the rear cover 1 comprises a circle of annular wall 12 arranged on the edge of the rear cover, a carbon brush frame 2 is arranged inside the rear cover 1, the carbon brush frame 2 comprises two carbon brush sliding grooves 20 for accommodating carbon brushes, protruding ends 21 are arranged at two ends of the carbon brush frame 2, and the upper end faces of the protruding ends 21 are flush with the upper end faces of the annular wall 12; specifically, a fastening groove 10 is formed in the rear cover 1, the shape of the protruding end 21 is matched with that of the fastening groove 10, and the protruding ends 21 at the two ends of the carbon brush holder 2 are fastened into the fastening groove 10 to position the carbon brush holder 2 in the rear cover 1.

A carbon brush 3 is slidably disposed in the carbon brush sliding groove 20, the carbon brush 3 is connected to a lead 100 supplying current thereto, and a spring 4 for applying elastic pressure to one end of the carbon brush 3 is disposed at the end. When the rear cover 1 is fixed with the motor main casing 200, the lower end surface of the motor main casing 200 is pressed against the upper end surface of the annular wall 12 and the upper end surface of the protruding end 21, so that the carbon brush holder is pressed between the motor main casing and the rear cover.

In the above structure, the protruding ends 21 provided at the two ends of the carbon brush holder 2 are pressed between the motor main housing 200 and the rear cover 1, and the carbon brush holder 2 and the rear cover 1 are fixed to each other. Therefore, fasteners such as screws and the like are omitted from being screwed on the carbon brush holder 2 to fix the two parts; and save the fastening piece。

In order to prevent the lead 100 from winding in the rear cover of the motor and causing interference with other parts in the rear cover of the motor, a wire pressing groove 5 is arranged on one side of the carbon brush sliding groove 20, and the lead 100 passes through the wire pressing groove 5 and the position of the lead is fixed through the wire pressing groove 5; and the carbon brush sliding groove 20 and the wire pressing groove 5 are integrally formed with the carbon brush holder 2.

Furthermore, be provided with location arch 11 on the back lid 1, what correspond be in be provided with on the terminal surface under the carbon brush frame 2 with location arch 11 complex locating hole 22, through the cooperation of location arch 11 and locating hole 22, can provide the location when for carbon brush frame 2 and back lid 1 assembly, and both assemble the back, can make and be difficult to produce the position change between the two, the terminal surface through locating hole 22 terminal surface and location arch 11 bottom mutually supports simultaneously, can improve the plane degree of whole carbon brush frame.

In this application, the rear end of carbon brush spout 20 is the opening the open-ended both sides set up fin 23 is last to insert and is equipped with and is used for sealing open-ended end cover 6. A spring seat 60 for limiting one end of the spring is arranged on the end cover 6. In the structure, the carbon brush 3 and the spring 4 can be sequentially arranged in the opening formed along the rear end of the carbon brush sliding groove 20, and then the opening is sealed by inserting the end cover 6, so that the installation efficiency of the carbon brush 3 is greatly improved.

One side of the upper end surface of the protruding end 21 extends laterally to form a flange 21a, a step is correspondingly formed on the inner side of the annular wall 12 of the rear cover 1, and the flange 21a is spanned on the step.

Example 2: referring to fig. 9 to 10, a sealing ring 7 is disposed on an end surface of the protruding end 21, a limiting groove 13 is disposed on the rear cover 1, the sealing ring 7 is located in the limiting groove, and when the rear cover 1 is fixed to the motor main housing 200, the lower end surface of the motor main housing 200 is pressed against the sealing ring 7, so that the carbon brush holder is pressed between the motor main housing and the rear cover. Example 2 the rest of the same procedure as in example 1.

In embodiment 2, because the sealing ring 7 is added, the whole carbon brush holder 2 can be more firmly pressed between the motor main shell and the rear cover, and the sealing ring improves the sealing performance between the motor main shell and the rear cover.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be appreciated by persons skilled in the art that the present invention is not limited by the embodiments described above. The foregoing embodiments and description of the invention have been provided for the purposes of illustrating the principles of the invention and is subject to various changes and modifications without departing from the spirit and scope of the invention. Such variations and modifications are intended to be within the scope of the claimed invention.

Claims

1. The utility model provides a lid structure behind diaphragm pump motor which characterized in that includes:

The rear cover (1), the rear cover (1) is provided with a buckle groove (10);

the carbon brush holder (2) comprises two carbon brush sliding grooves (20) for accommodating carbon brushes, protruding ends (21) matched with the buckling grooves (10) in shape are arranged at two ends of the carbon brush holder (2), and the protruding ends (21) are arranged in the buckling grooves (10);

the carbon brush (3) is arranged in the carbon brush sliding groove (20) in a sliding mode, the carbon brush (3) is connected with a lead (100) for supplying current to the carbon brush, and one end of the carbon brush (3) is provided with a spring (4) for applying elastic pressure to the end of the carbon brush;

when the rear cover (1) is fixed with the motor main shell (200), the carbon brush holder (2) is pressed between the motor main shell (200) and the rear cover (1).

2. The back cover structure of a motor of a diaphragm pump according to claim 1, wherein: the rear cover (1) comprises a ring of annular wall (12) arranged on the edge of the rear cover, the upper end face of the protruding end (21) is flush with the upper end face of the annular wall (12), and when the rear cover (1) is fixed with the motor main shell (200), the lower end face of the motor main shell (200) is abutted against the upper end face of the annular wall (12) and the upper end face of the protruding end (21).

3. The back cover structure of a motor of a diaphragm pump according to claim 2, wherein: one side of the upper end face of the protruding end (21) extends laterally to form a flange (21 a), a step is correspondingly formed on the inner side of the annular wall (12) of the rear cover (1), and the flange (21 a) is erected on the step.

4. The back cover structure of a motor of a diaphragm pump according to claim 1, wherein: be provided with a sealing ring (7) on the terminal surface of protrusion end (21) be provided with spacing groove (13) on back lid (1), sealing ring (7) are located the spacing inslot, when back lid (1) is fixed with the main casing body of motor (200), the lower terminal surface of the main casing body of motor (200) with sealing ring (7) support and press.

5. The back cover structure of a motor of a diaphragm pump according to claim 1, wherein: the rear cover (1) is provided with a positioning bulge (11), and the lower end face of the carbon brush holder (2) is correspondingly provided with a positioning hole (22) matched with the positioning bulge (11).

6. The back cover structure of a motor of a diaphragm pump according to claim 1, wherein: the carbon brush sliding groove (20) and the carbon brush frame (2) are integrally formed.

7. The back cover structure of a motor of a diaphragm pump according to claim 1, wherein: a wire pressing groove (5) is formed in one side of the carbon brush sliding groove (20), and the lead (100) passes through the wire pressing groove (5).

8. The back cover structure of a motor of a diaphragm pump according to claim 1, wherein: the wire pressing groove (5) and the carbon brush holder (2) are integrally formed.

9. The back cover structure of a motor of a diaphragm pump according to claim 1, wherein: the rear end of the carbon brush sliding groove (20) is an opening, the two sides of the opening are provided with fins (23), and an end cover (6) used for closing the opening is inserted into the fins (23).

10. The back cover structure of a motor of a diaphragm pump according to claim 9, wherein: and a spring seat (60) used for limiting one end of the spring is arranged on the end cover (6).