A diaphragm pump motor rear cover structure

Abstract

The present invention discloses a diaphragm pump motor rear cover structure, including a rear cover and a carbon brush holder, wherein a buckle groove is arranged on the rear cover; protruding ends matching the buckle groove shape are arranged at both ends of the carbon brush holder, and the protruding ends are arranged in the buckle groove; when the rear cover is fixed to the motor main housing, the carbon brush holder is pressed between the motor main housing and the rear cover. The diaphragm pump motor rear cover of the present invention presses the protruding ends arranged at both ends of the carbon brush holder between the motor main housing and the rear cover, thereby fixing the carbon brush holder and the rear cover. In this way, it is unnecessary to screw fasteners such as screws on the carbon brush holder to achieve the fixing of the above two components; and since the fasteners are omitted, the sealing performance of the rear cover is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of diaphragm pump motors, and more specifically to a rear cover structure of a diaphragm pump motor. Background Art

[0002] See attached Figure 1 The brush holder structure 1 in the existing diaphragm pump motor back cover is connected by fasteners such as screws or rivets and assembled with the back cover 2. There are two locations on the back cover of the motor where the motor temperature is the highest, one is the brush, and the other is the bearing. The high temperature at the bearing is mainly caused by conduction through the rotor core. When the back cover is made of plastic, the heat inside the motor cannot be quickly dissipated due to the poor thermal conductivity of the plastic, and the temperature of the motor rises rapidly. The high temperature will make the material requirements of the motor higher, or change the motor performance and other methods to solve the problem, and this solution will greatly increase the cost of the motor.

[0003] To solve the above problems, more companies are currently using a combination of a metal back cover and a plastic brush holder, so that the heat at the motor back cover can be quickly dissipated through the metal back cover. However, this structure also has its shortcomings:

[0004] 1) The screw holes are self-drilled, which has high requirements on hole diameter, screw size, and screw force. It is easy to have defects such as slipping threads and insufficient tightening of screws.

[0005] 2) When using machine screws, the back cover needs to be tapped after processing, but the tapping with a thread cannot reach the bottom. For example, for a hole 10mm high, the tapping is only about 7mm. In addition, tapping will lead to defective products, low production efficiency, and increase the manufacturing cost of the product. At the same time, it also increases the risk of improper assembly of the product, which can cause abnormal noise, shortened life, and even burnout and non-operation of the motor.

[0006] In addition, due to the particularity of the working environment of the booster pump used in the water purifier, the booster diaphragm pump is required to meet at least the IPX4 waterproof requirement, so the motor part of the pump must also be designed to be sealed and cannot be designed to be ventilated like some motors. Summary of the invention

[0007] The present invention aims at the deficiencies in the prior art and provides a diaphragm pump motor rear cover structure.

[0008] The present invention is achieved through the following technical solution: a diaphragm pump motor rear cover structure, comprising:

[0009] A rear cover, on which a buckle groove is provided;

[0010] A carbon brush holder, the carbon brush holder comprising two carbon brush slide grooves for accommodating carbon brushes, protruding ends matching the shape of the buckle grooves are arranged at both ends of the carbon brush holder, and the protruding ends are arranged in the buckle grooves;

[0011] A carbon brush is slidably disposed in the carbon brush slideway, the carbon brush is connected to a lead wire that provides current to the carbon brush, and a spring is disposed at one end of the carbon brush for applying elastic pressure to the end;

[0012] When the rear cover is fixed to the motor main housing, the carbon brush holder is pressed between the motor main housing and the rear cover.

[0013] In the above technical solution, the back cover includes a circle of annular walls arranged on its edge, the upper end surface of the protruding end is flush with the upper end surface of the annular wall, and when the back cover is fixed to the main housing of the motor, the lower end surface of the main housing of the motor is pressed against the upper end surface of the annular wall and the upper end surface of the protruding end.

[0014] In the above technical solution, one side of the upper end surface of the protruding end extends laterally to form a flange, and a step is correspondingly formed on the inner side of the annular wall of the rear cover, and the flange is mounted on the step.

[0015] In the above technical solution, a sealing ring is arranged on the end face of the protruding end, and a limiting groove is arranged on the back cover. The sealing ring is located in the limiting groove. When the back cover is fixed to the main housing of the motor, the lower end face of the main housing of the motor is pressed against the sealing ring.

[0016] In the above technical solution, a positioning protrusion is arranged on the rear cover, and a positioning hole cooperating with the positioning protrusion is correspondingly arranged on the lower end surface of the carbon brush holder.

[0017] In the above technical solution, the carbon brush slideway and the carbon brush holder are integrally formed.

[0018] In the above technical solution, a wire pressing groove is provided on one side of the carbon brush slide groove, and the lead wire passes through the wire pressing groove.

[0019] In the above technical solution, the wire pressing groove and the carbon brush holder are integrally formed.

[0020] In the above technical solution, the rear end of the carbon brush chute is an opening, wings are arranged on both sides of the opening, and end covers for closing the opening are inserted on the wings.

[0021] In the above technical solution, a spring seat for limiting one end of the spring is arranged on the end cover.

[0022] The present invention has the following beneficial effects: the rear cover of the diaphragm pump motor of the present invention presses the protruding ends of the carbon brush holder at both ends between the motor main housing and the rear cover, thereby fixing the carbon brush holder and the rear cover. In this way, it is unnecessary to screw fasteners such as screws on the carbon brush holder to fix the two components; and because the fasteners are omitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the rear cover of the diaphragm pump motor in the background technology.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the carbon brush holder.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the carbon brush holder in another direction.

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the back cover.

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the end cover.

[0029] Figure 7 It is a schematic diagram of the cross-sectional structure when the main housing of the motor is fixed to the rear cover.

[0030] Figure 8 for Figure 7 A partial enlarged view of point A in the middle.

[0031] Fig. 9 It is a schematic structural diagram of another embodiment of the present invention.

[0032] Fig.10 It is a schematic diagram of an exploded view of another embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Example 1: Figures 2 to 8 , including: a diaphragm pump motor back cover structure, including a back cover 1, the back cover 1 includes a circle of annular walls 12 arranged on the edge thereof, a carbon brush holder 2 is arranged inside the back cover 1, the carbon brush holder 2 includes two carbon brush slide grooves 20 for accommodating carbon brushes, and protruding ends 21 are arranged at both ends of the carbon brush holder 2, and the upper end surface of the protruding end 21 is flush with the upper end surface of the annular wall 12; specifically, a buckle groove 10 is arranged on the back cover 1, and the shape of the protruding end 21 matches the shape of the buckle groove 10, and the protruding ends 21 at both ends of the carbon brush holder 2 are buckled into the buckle groove 10 to realize the positioning of the carbon brush holder 2 in the back cover 1.

[0034] A carbon brush 3 is slidably disposed in the carbon brush chute 20, the carbon brush 3 is connected to a lead 100 for supplying current thereto, and a spring 4 for applying elastic pressure to the end of the carbon brush 3 is disposed at one end. When the rear cover 1 is fixed to the motor main housing 200, the lower end surface of the motor main housing 200 presses against the upper end surface of the annular wall 12 and the upper end surface of the protruding end 21, thereby pressing the carbon brush holder between the motor main housing and the rear cover.

[0035] In the above structure, the protruding ends 21 provided at both ends of the carbon brush holder 2 are pressed between the motor main housing 200 and the rear cover 1, thereby fixing the carbon brush holder 2 and the rear cover 1. In this way, it is unnecessary to screw fasteners such as screws on the carbon brush holder 2 to fix the two components; and the fasteners are unnecessary. 。

[0036] In order to prevent the lead wire 100 from getting entangled in the rear cover of the motor and causing it to interfere with other components in the rear cover of the motor, a wire pressing groove 5 is provided on one side of the carbon brush slide 20 in the present application, and the lead wire 100 passes through the wire pressing groove 5, and the position of the lead wire is fixed by the wire pressing groove 5; and the carbon brush slide 20 and the wire pressing groove 5 are integrally formed with the carbon brush holder 2.

[0037] Furthermore, a positioning protrusion 11 is provided on the rear cover 1, and a positioning hole 22 cooperating with the positioning protrusion 11 is correspondingly provided on the lower end surface of the carbon brush holder 2. Through the cooperation between the positioning protrusion 11 and the positioning hole 22, positioning can be provided when the carbon brush holder 2 and the rear cover 1 are assembled, and after the two are assembled, it can be prevented from easily causing position changes between the two. At the same time, through the cooperation between the end face of the positioning hole 22 and the end face of the bottom of the positioning protrusion 11, the flatness of the entire carbon brush holder can be improved.

[0038] In the present application, the rear end of the carbon brush chute 20 is an opening, and fins 23 are provided on both sides of the opening, and an end cap 6 for closing the opening is inserted on the fin 23. A spring seat 60 for limiting one end of the spring is provided on the end cap 6. In the above structure, the carbon brush 3 and the spring 4 can be sequentially loaded into the opening along the rear end of the carbon brush chute 20, and then the end cap 6 is inserted to close the opening, which greatly improves the installation efficiency of the carbon brush 3.

[0039] One side of the upper end surface of the protruding end 21 extends laterally to form a flange 21 a , and 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 mounted on the step.

[0040] Example 2: See Figures 9 and 10A sealing ring 7 is provided on the end surface of the protruding end 21, and a limiting groove 13 is provided on the rear cover 1. The sealing ring 7 is located in the limiting groove. When the rear cover 1 is fixed to the motor main housing 200, the lower end surface of the motor main housing 200 presses against the sealing ring 7, thereby pressing the carbon brush holder between the motor main housing and the rear cover. The rest of the embodiment 2 is the same as the embodiment 1.

[0041] In Example 2, due to the addition of the sealing ring 7, firstly, the entire carbon brush holder 2 can be more securely pressed between the motor main housing and the rear cover, and the sealing ring also improves the sealing between the motor main housing and the rear cover.

[0042] The above shows and describes the basic principle, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions in this application are only the principles of the present invention, and the present invention may have various changes and modifications without departing from the spirit and scope of the present invention. The above changes and modifications all fall within the scope of the present invention claimed.

Claims

1. A diaphragm pump motor rear cover structure, characterized in that: include: A rear cover (1), wherein a buckle groove (10) is provided on the rear cover (1); A carbon brush holder (2), the carbon brush holder (2) comprising two carbon brush slide grooves (20) for accommodating carbon brushes, protruding ends (21) matching the shape of the buckle groove (10) being arranged at both ends of the carbon brush holder (2), the protruding ends (21) being arranged in the buckle groove (10); A carbon brush (3) which is slidably disposed in the carbon brush slide groove (20), the carbon brush (3) being connected to a lead (100) for supplying current to the carbon brush, and a spring (4) for applying elastic pressure to the end of the carbon brush (3); When the rear cover (1) is fixed to the motor main housing (200), the carbon brush holder (2) is pressed tightly between the motor main housing (200) and the rear cover (1); The rear cover (1) comprises a ring-shaped wall (12) arranged on its edge, the upper end surface of the protruding end (21) is flush with the upper end surface of the ring-shaped wall (12), 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 upper end surface of the ring-shaped wall (12) and the upper end surface of the protruding end (21), a sealing ring (7) is arranged on the end surface of the protruding end (21), and a limiting groove (13) is arranged 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).

2. A diaphragm pump motor rear cover structure as claimed in claim 1, characterized in that: One side of the upper end surface of the protruding end (21) extends laterally to form a flange (21a), and a step is correspondingly formed on the inner side of the annular wall (12) of the rear cover (1), and the flange (21a) is mounted on the step.

3. A diaphragm pump motor rear cover structure as claimed in claim 1, characterized in that: A positioning protrusion (11) is provided on the rear cover (1), and a corresponding positioning hole (22) cooperating with the positioning protrusion (11) is provided on the lower end surface of the carbon brush holder (2).

4. A diaphragm pump motor rear cover structure as claimed in claim 1, characterized in that: The carbon brush slide groove (20) and the carbon brush holder (2) are integrally formed.

5. A diaphragm pump motor rear cover structure as claimed in claim 1, characterized in that: A wire pressing groove (5) is provided on one side of the carbon brush slide groove (20), and the lead wire (100) passes through the wire pressing groove (5).

6. A diaphragm pump motor rear cover structure as claimed in claim 5, characterized in that: The wire pressing groove (5) and the carbon brush holder (2) are integrally formed.

7. A diaphragm pump motor rear cover structure as claimed in claim 1, characterized in that: The rear end of the carbon brush slide groove (20) is an opening, wings (23) are arranged on both sides of the opening, and end covers (6) for closing the opening are inserted on the wings (23).

8. A diaphragm pump motor rear cover structure as claimed in claim 7, characterized in that: A spring seat (60) for limiting one end of the spring is provided on the end cover (6).

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