CN219993888U - Diaphragm pump for beverage machine - Google Patents

Abstract

The utility model provides a diaphragm pump for beverage machine, includes motor and pump body, and the motor is connected and is driven the work of pump body, be equipped with inlet chamber and play water cavity in the pump body, its characterized in that: the pump body is also provided with a backflow pressure limiting device, and the backflow pressure limiting device is provided with water holes which are respectively communicated with the water inlet cavity and the water outlet cavity; the water sealing device is characterized by further comprising a backflow driving assembly, wherein the backflow driving assembly is arranged in the backflow pressure limiting device and is provided with a water sealing sheet to close the water through hole, and the water sealing sheet can be moved to open the water through hole under the action of pressure difference to realize backflow. According to the utility model, the water sealing sheet is used for opening the backflow channel, so that the excessive pressure of the water outlet cavity is avoided, the pressure balance is ensured, the water outlet is more uniform, and the performance is more stable.

Description

Diaphragm pump for beverage machine

Technical Field

The utility model relates to the field of diaphragm pumps, in particular to a diaphragm pump for a beverage machine.

Background

The diaphragm pump replaces the piston with a specially designed flexible diaphragm, and realizes reciprocating motion under the action of the driving mechanism to complete the suction and discharge processes. The diaphragm pump can be widely used in industries and scientific departments such as petroleum, chemical industry, textile, food, paper making, atomic energy technology, power plants, plastics, pharmacy, water factories, environmental protection and the like, such as cola on-site regulators, pressure stabilizing systems, juicers, soda water machines, commercial water purifiers, coffee machines and the like.

The existing diaphragm pump for beverage machine usually utilizes the back and forth movement of a diaphragm to change the volume of a cavity to suck and discharge liquid, and generally comprises a motor and a pump body, wherein the motor can comprise a stator assembly, a rotor assembly, a carbon brush and the like, the motor can drive the diaphragm to reciprocate to suck and discharge liquid through the circular movement of the motor, and water is continuously sucked and discharged under the action of kinetic energy transmitted by the motor to form relatively stable flow.

However, in the conventional diaphragm pump, when the pressure of the internal chamber of the pump body is unbalanced, a shake is formed, so that the output liquid is discontinuous, and the pulsation water is generated, so that the performance is reduced. In addition, the connection mode of water pipe in the current diaphragm pump is threaded connection generally, and live time has for a long time, and the water pipe is leaked because of ageing causes easily to be connected with the pump body, changes the water pipe inconvenient to cause the maintenance degree of difficulty to increase, and the angle of connection between water pipe and the pump body is unadjustable, can not adjust according to actual installation environment and demand, installs inconveniently.

Disclosure of Invention

The utility model mainly aims to overcome the defect that the performance is affected due to unbalanced pressure in the inner cavity of the traditional diaphragm pump for the beverage machine, and provides the diaphragm pump for the beverage machine, which has a backflow function and can realize uniform water outlet.

The utility model adopts the following technical scheme:

the utility model provides a diaphragm pump for beverage machine, includes motor and pump body, and the motor is connected and is driven the work of pump body, be equipped with inlet chamber and play water cavity in the pump body, its characterized in that: the pump body is also provided with a backflow pressure limiting device, and the backflow pressure limiting device is provided with water holes which are respectively communicated with the water inlet cavity and the water outlet cavity; the water sealing device is characterized by further comprising a backflow driving assembly, wherein the backflow driving assembly is arranged in the backflow pressure limiting device and is provided with a water sealing sheet to close the water through hole, and the water sealing sheet can be moved to open the water through hole under the action of pressure difference to realize backflow.

Preferably, the reflux drive assembly further comprises an elastic member and a mounting sleeve; the mounting sleeve is fixed on the pump body and is provided with a guide post inserted into the backflow pressure limiting device, and a guide hole is formed in the guide post; the water sealing piece is provided with a sliding part at one side opposite to the mounting sleeve, the sliding part is movably inserted into the guide hole, and the elastic piece is positioned in the guide hole and is propped between the water sealing piece and the corresponding end of the guide post so that the water sealing piece closes the water through hole.

Preferably, the pump body is provided with a water inlet pipe, the water inlet pipe is communicated with the water inlet cavity, the periphery of the water inlet pipe is provided with a circumferentially extending jack, and the jack radially penetrates through the water inlet pipe; the water inlet connector is characterized by further comprising a water inlet connector and an inserting sheet, wherein one end of the water inlet connector can be inserted into the water inlet pipe in a circumferential rotation mode, an annular groove is formed in the outer periphery of the water inlet connector, the part of the annular groove is opposite to the inserting hole, and the inserting sheet is inserted into the inserting hole and is clamped into the annular groove to axially fix the water inlet connector.

Preferably, the pump body is provided with a water outlet pipe, the water outlet pipe is communicated with the water outlet cavity, the periphery of the water outlet pipe is provided with a jack extending circumferentially, and the jack radially penetrates through the water outlet pipe; the water outlet connector is characterized by further comprising a water outlet connector and an inserting sheet, wherein one end of the water outlet connector can be inserted into the water outlet pipe in a circumferential rotation mode, an annular groove is formed in the outer periphery of the water outlet connector, the part of the annular groove is opposite to the inserting hole, and the inserting sheet is inserted into the inserting hole and is clamped into the annular groove to axially fix the water outlet connector.

Preferably, the insert is provided with two long arms, and the two long arms are respectively inserted into the insertion holes and clamped into the ring grooves.

Preferably, the inserting piece is further provided with a connecting part, and the connecting part is connected between one ends of the two long arms; and a tangential plane is arranged on one side of the jack, which is perpendicular to the insertion direction of the inserting piece, so that the connecting part is exposed.

Preferably, the backflow pressure limiting device adopts a backflow cavity, and the backflow cavity is provided with the water through hole; a convex ring is arranged at the end of the reflux cavity of the water through hole, and the water sealing piece is abutted against the convex ring to seal the through hole; the reflux driving assembly is arranged in the reflux cavity.

Preferably, one end of the pump body is provided with a shell, and the water inlet cavity, the water outlet cavity and the backflow pressure limiting device are formed on the shell.

Preferably, the motor is provided with an end cover and two carbon brushes, and two mounting holes are formed in the end cover; the two carbon brushes are detachably installed in the installation holes respectively.

Preferably, the carbon brush comprises a cover body, a brush body and a carbon brush bolt, wherein the brush body is positioned in the carbon brush bolt, the carbon brush bolt is detachably installed in the installation hole, and the cover body is fixed at the outer end of the carbon brush bolt.

As can be seen from the above description of the present utility model, compared with the prior art, the present utility model has the following advantages:

1. according to the diaphragm pump, the reflux pressure limiting device is arranged on the pump body, the reflux driving assembly is arranged in the reflux pressure limiting device, the reflux channel is opened through the water sealing sheet, the excessive pressure of the water outlet cavity is avoided, the bursting and water leakage are prevented, the pressure balance is ensured, the water outlet is more uniform, and the performance is more stable.

2. According to the diaphragm pump disclosed by the utility model, the reflux driving assembly is further provided with the elastic piece and the mounting sleeve, the reflux pressure limiting device is internally provided with the guide post, the sliding part of the water sealing piece is movably inserted into the guide hole of the guide post to ensure that the water sealing piece moves more reliably, and the elastic piece is positioned in the guide hole to enable the water sealing piece to close the water through hole, so that the diaphragm pump is simple in structure and low in cost.

3. According to the diaphragm pump disclosed by the utility model, the pump body is provided with the water inlet pipe and the water outlet pipe with the jacks, the water inlet connector and the water outlet connector can be respectively and rotatably inserted and axially fixed by matching with the inserting sheets, the quick installation can be realized, the water inlet connector and the water outlet connector can rotate by 360 degrees, and the requirements of different installation angles are met.

4. According to the diaphragm pump disclosed by the utility model, the inserting piece is provided with the two long arms and the connecting part, the two long arms are respectively inserted into the inserting holes and clamped into the annular grooves to realize axial fixation, the connecting part can be partially exposed, the pulling and the inserting are convenient, the structure is ingenious, and the operation is convenient.

5. According to the diaphragm pump, the two mounting holes are formed in the end cover of the motor, and the two carbon brushes are respectively detachably mounted in the mounting holes, so that the carbon brushes can be conveniently replaced, the service life of the motor is prolonged, and the maintenance cost is reduced.

Drawings

FIG. 1 is a block diagram of the present utility model;

FIG. 2 is an exploded view of a portion of the structure of the present utility model;

FIG. 3 is a diagram of a tab construction;

FIG. 4 is a diagram of the structure of the water inlet pipe or the water outlet pipe;

FIG. 5 is a block diagram of the current-limiting device of the present utility model;

FIG. 6 is a block diagram of a pump housing of the present utility model;

FIG. 7 is a partial cross-sectional view of the present utility model;

FIG. 8 is an exploded view of the present utility model;

wherein:

10. the motor, 11, the end cover, 12, the carbon brush, 13, the mounting hole, 14, the cover body, 15, the brush body, 16, the carbon brush bolt, 17, the eccentric sleeve, 19, the electric wire, 20, the pump body, 21, the connecting sleeve, 22, the vibrating piece, 23, the sealing piece, 24, the filter screen, 25, the water outlet disc, 30, the shell, 31, the water inlet cavity, 32, the water outlet cavity, 33, the back-flow pressure limiting device, 34, the water through hole, 35, the bulge loop, 40, the back-flow driving component, 41, the water sealing piece, 42, the elastic piece, 43, the mounting sleeve, 44, the sliding part, 45, the guide post, 46, the guide hole, 50, the water inlet pipe, 51, the water inlet joint, 51a, the sealing ring, 52, the water outlet pipe, 53, the water outlet joint, 54, the inserting piece, 55, the inserting hole, 56, the long arm, 57, the connecting part, 58, the ring groove, 59, the section 60, the rotor assembly, 61, the rotating shaft, 62, the commutator, 70, the stator assembly, 71, the iron barrel, 72 and the magnet.

Detailed Description

The utility model is further described below by means of specific embodiments.

The terms "first," "second," and the like in the present utility model are merely for convenience of description to distinguish between different constituent components having the same name, and do not denote a sequential or primary or secondary relationship.

In the description of the present utility model, the directions or positional relationships indicated by "upper", "lower", "left", "right", "front" and "rear", etc. are used for convenience of description of the present utility model based on the directions or positional relationships shown in the drawings, and are not intended to indicate or imply that the apparatus referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the scope of protection of the present utility model.

Referring to fig. 1 to 8, a diaphragm pump for a beverage machine includes a motor 10, a pump body 20, etc., wherein the motor 10 is connected to drive the pump body 20 to operate, i.e., a rotation shaft of the motor 10 is driven to vibrate a vibrating member 22 in the pump body 20 or reciprocate a diaphragm to suck and discharge liquid. The pump body 20 is also provided with a water inlet cavity 31, a water outlet cavity 32 and a backflow pressure limiting device 33, wherein the water inlet cavity 31 is used for sucking liquid, namely water inlet, and the water outlet cavity 32 is used for discharging liquid, namely water outlet. The backflow pressure limiting device 33 is used for backflow to avoid excessive pressure in the pump body 20, and is provided with water through holes 34 respectively communicated with the water inlet cavity 31 and the water outlet cavity 32, namely, the backflow pressure limiting device comprises two water through holes 34, one water through hole 34 is communicated with the water inlet cavity 31, and the other water through hole 34 is communicated with the water outlet cavity 32. The pump body 20 further comprises a backflow driving assembly 40, the backflow driving assembly 40 is arranged in the backflow pressure limiting device 33 and used for opening or closing backflow, a water sealing sheet 41 is arranged for closing the water through hole 34, and the water sealing sheet 41 can move under the action of pressure difference to open the water through hole 34 to achieve backflow.

In the present utility model, the backflow pressure limiting device 33 may have a cavity structure, that is, a backflow cavity is provided, and the water through hole 34 is located on and communicates with the backflow cavity. In a normal state, the water sealing piece 41 is arranged to close the water through hole 34, namely, a backflow channel formed by the water inlet cavity 31, the backflow pressure limiting device 33 and the water outlet cavity 32 is closed; when the pressure of the water outlet cavity 32 is high, the water sealing piece 41 can open the water opening 34, and a backflow channel formed by the water outlet cavity 32, the backflow cavity of the backflow pressure limiting device 33 and the water inlet cavity 31 is opened, so that part of liquid flowing out of the water outlet cavity 32 can be separated by the backflow pressure limiting device 33 and backflow to the water inlet cavity 31, and the water pressure of the water outlet cavity 32 can be reduced.

Further, the backflow driving assembly 40 further comprises an elastic member 42 and a mounting sleeve 43, the mounting sleeve 43 is fixed on the pump body 20 and provided with a guide post 45 inserted into the backflow cavity of the backflow limiting device 33, a guide hole 46 is formed in the guide post 45, and the guide post 45 is used for mounting the elastic member 42 and guiding the movement of the sealing sheet 41. The sealing piece 41 is provided with a sliding part 44 at one side opposite to the mounting sleeve 43, the sliding part 44 is movably inserted into the guiding hole 46, that is, the sliding part 44 can move along the guiding hole 46, and the sliding part 44 and the sealing piece 41 can be integrally formed or separately arranged. The elastic member 42 is located in the guide hole 46 and is stretched between the corresponding ends of the water sealing sheet 41 and the guide post 45, so that the water sealing sheet 41 closes the water through hole 34.

In practical applications, when the water sealing sheet 41 closes the backflow channel, the water through hole 34 or two water through holes 34 may be plugged, specifically, the end of the backflow cavity of the backflow pressure limiting device 33 of one water through hole 34 is provided with the convex ring 35, the water sealing sheet 41 abuts against the convex ring 35, that is, the end of the backflow cavity of the water through hole 34 is plugged to realize the closed through hole.

In order to facilitate the connection of the pipes, the pump body 20 of the present utility model is provided with a water inlet pipe 50, the water inlet pipe 50 is communicated with the water inlet cavity 31, and the periphery thereof is provided with a circumferentially extending insertion hole 55, and the insertion hole 55 radially penetrates through the water inlet pipe 50. The water inlet connector is characterized by further comprising a water inlet connector 51 and an inserting piece 54, wherein one end of the water inlet connector 51 can be inserted into the water inlet pipe 50 in a circumferential rotation manner, an annular groove 58 is formed in the outer periphery of the water inlet connector, the annular groove 58 is partially opposite to the inserting hole 55, the inserting piece 54 is inserted into the inserting hole 55 and is clamped into the annular groove 58 to axially fix the water inlet connector 51, the size of the inserting hole 55 can be matched with the width of the inserting piece 54, and the inserting piece 54 can be ensured to be inserted into the inserting hole 55. The water inlet joint 51 can be sleeved with a plurality of sealing rings 52 for realizing sealing fit with the water inlet pipe 50, and the other end of the water inlet joint 51 is used for connecting the water inlet pipe 50. The water inlet joint 51 and the water inlet pipe 50 are arranged in a plugging manner, and the water inlet joint 51 can rotate at an angle of 50360 degrees relative to the water inlet pipe, so that the installation is very convenient.

Likewise, the pump body 20 is provided with a water outlet pipe 52, the water outlet pipe 52 is communicated with the water outlet cavity 32, and the periphery of the water outlet pipe 52 is provided with circumferentially extending insertion holes 55, and the insertion holes 55 radially penetrate through the water outlet pipe 52. The water outlet connector 53 and the inserting piece 54 are further included, one end of the water outlet connector 53 can be inserted into the water outlet pipe 52 in a circumferential rotation mode, an annular groove 58 is formed in the periphery of the water outlet connector 53, the annular groove 58 is partially opposite to the insertion hole 55, the inserting piece 54 is inserted into the insertion hole 55 and is clamped into the annular groove 58 to axially fix the water outlet connector 53, and the other end of the water outlet connector 53 is used for being connected with a water outlet pipe 52. The water outlet connector 53 and the water inlet pipe 50 are arranged in a plugging manner, and the water outlet connector 53 can rotate 360 degrees relative to the water inlet pipe 50, so that the installation is very convenient.

Further, the insert piece 54 is provided with two long arms 56 and a connecting portion 57, the two long arms 56 can be arranged at intervals relatively, the two long arms 56 can be inserted into the insertion holes 55 and clamped into the ring grooves 58 respectively, then the two long arms 56 can be clamped at two opposite sides of the periphery of the water inlet joint 51 or the water outlet joint 53, and the insert piece 54 fixes the water inlet joint 51 axially, but does not affect the circumferential rotation of the water inlet joint 51. The connecting portion 57 is connected between one ends of the two long arms 56, the connecting portion 57 may be arc-shaped, and may be matched with the outer side Zhou Shi of the water inlet pipe 50 or the water outlet pipe 52, so that in order to facilitate the connection portion 57 to be pulled out of the water inlet pipe 50 or the water outlet pipe 52, a tangential plane 59 is further provided on one side of the insertion hole 55 perpendicular to the insertion direction of the insertion piece 54 to expose the connecting portion 57, and a notch may be provided on the inner side of the connecting portion 57 to facilitate the application of force. In practical applications, a protrusion may be disposed on the outer side of the connection portion 57 or the connection portion 57 may be disposed to partially protrude outside the water inlet pipe 50 or the water outlet pipe 52.

One end of the pump body 20 of the present utility model is provided with a housing 30, and a water inlet chamber 31, a water outlet chamber 32 and a return flow pressure limiting device 33 are formed on the housing 30. The pump body 20 may further include a connecting sleeve 21, a vibrating member 22, a sealing piece 23, a filter screen 24, a plurality of water outlet discs 25, etc., wherein the connecting sleeve 21 is connected with the housing 30, the vibrating member 22 is arranged on the connecting sleeve 21 in a penetrating manner and acts on the water inlet cavity 31, the sealing piece 23, the filter screen 24, the water outlet discs 25, etc. are arranged between the connecting sleeve 21 and the housing 30, the plurality of water outlet discs 25 are arranged in the water outlet cavity 32 and the water inlet cavity 31, an eccentric sleeve 17 is sleeved on a rotating shaft of the motor 10, and the eccentric sleeve 17 is connected with the vibrating member 22.

The motor 10 is provided with an end cover 11 and two carbon brushes 12, and two mounting holes 13 are formed in the end cover 11; the two carbon brushes 12 are detachably installed in the installation holes 13, that is, the carbon brushes 12 are arranged in a replaceable structure, so that the service life of the motor 10 is prolonged. The motor 10 further comprises a rotor assembly 60, a stator assembly 70, an electric wire 19 and other necessary components, wherein the rotor assembly 60 comprises a rotating shaft 61, a commutator 62 and the like, the stator assembly 70 comprises an iron cylinder 71, a magnet 72 and the like, the end cover 11 can be arranged at one end of the iron cylinder 71, and the other end of the iron cylinder 71 can be provided with a rear cover and fixedly connected with a connecting frame of the pump body 20.

The carbon brush 12 of the utility model comprises a cover body 14, a brush body 15 and a carbon brush plug 16, wherein the brush body 15 is positioned in the carbon brush plug 16, the carbon brush plug 16 is detachably arranged in the mounting hole 13, and the cover body 14 is fixed at the outer end of the carbon brush plug 16. The carbon brush plug 16 can be embedded into the mounting hole 13 and can be tightly matched with the mounting hole, and the carbon brush plug 16 can be directly taken out when the carbon brush plug needs to be replaced.

When the utility model is installed, the water inlet joint 51 is inserted into the water inlet pipe 50, the inserting piece 54 is inserted into the inserting hole 55 of the water inlet pipe 50 and is clamped in the annular groove 58 of the water inlet joint 51, the water outlet joint 53 is inserted into the water outlet pipe 52, the inserting piece 54 is inserted into the inserting hole 55 of the water outlet pipe 52 and is clamped on the annular groove 58 of the water outlet joint 53, the water inlet pipe 50 is connected with the water inlet joint 51, and when the water outlet pipe 52 is connected with the water outlet joint 53, the angle can be adjusted by rotating the water inlet joint 51 and the water outlet joint 53, so that the installation is very convenient.

The diaphragm pump of the present utility model can be used in beverage machines, such as cola machines, soda machines, or machines for making tea, coffee, chocolate hot or cold beverages, etc. When the motor works, the output shaft of the motor 10 realizes liquid suction and discharge by driving the vibrating piece or the diaphragm in the pump body 20 to reciprocate, namely, the liquid enters the water inlet cavity 31 through the water inlet joint 51 and the water inlet pipe 50 and is discharged through the water outlet cavity 32, the water outlet pipe 52 and the water outlet joint 53, and the backflow passage is closed because the elastic force of the elastic piece 42 is larger than the water pressure of the water inlet cavity 31; when the pressure of the water outlet cavity 32 is too high, the elastic force of the elastic member 42 is overcome to drive the water sealing sheet 41 to move to open the water opening 34, the elastic member 42 is compressed, the backflow channel is opened, part of water in the water outlet cavity 32 flows back to the water inlet cavity 31 through the backflow channel until the pressure is balanced, the elastic member 42 returns, and the water sealing sheet 41 closes the backflow channel.

The foregoing is merely illustrative of specific embodiments of the present utility model, but the design concept of the present utility model is not limited thereto, and any insubstantial modification of the present utility model by using the design concept shall fall within the scope of the present utility model.

Claims (10)

1. The utility model provides a diaphragm pump for beverage machine, includes motor and pump body, and the motor is connected and is driven the work of pump body, be equipped with inlet chamber and play water cavity in the pump body, its characterized in that: the pump body is also provided with a backflow pressure limiting device, and the backflow pressure limiting device is provided with water holes which are respectively communicated with the water inlet cavity and the water outlet cavity; the water sealing device is characterized by further comprising a backflow driving assembly, wherein the backflow driving assembly is arranged in the backflow pressure limiting device and is provided with a water sealing sheet to close the water through hole, and the water sealing sheet can be moved to open the water through hole under the action of pressure difference to realize backflow.

2. A diaphragm pump for a beverage machine according to claim 1, wherein: the reflux driving assembly further comprises an elastic piece and a mounting sleeve; the mounting sleeve is fixed on the pump body and is provided with a guide post inserted into the backflow pressure limiting device, and a guide hole is formed in the guide post; the water sealing piece is provided with a sliding part at one side opposite to the mounting sleeve, the sliding part is movably inserted into the guide hole, and the elastic piece is positioned in the guide hole and is propped between the water sealing piece and the corresponding end of the guide post so that the water sealing piece closes the water through hole.

3. A diaphragm pump for a beverage machine according to claim 1, wherein: the pump body is provided with a water inlet pipe, the water inlet pipe is communicated with the water inlet cavity, the periphery of the water inlet pipe is provided with a circumferentially extending jack, and the jack radially penetrates through the water inlet pipe; the water inlet connector is characterized by further comprising a water inlet connector and an inserting sheet, wherein one end of the water inlet connector can be inserted into the water inlet pipe in a circumferential rotation mode, an annular groove is formed in the outer periphery of the water inlet connector, the part of the annular groove is opposite to the inserting hole, and the inserting sheet is inserted into the inserting hole and is clamped into the annular groove to axially fix the water inlet connector.

4. A diaphragm pump for a beverage machine according to claim 1, wherein: the pump body is provided with a water outlet pipe, the water outlet pipe is communicated with the water outlet cavity, the periphery of the water outlet pipe is provided with a jack extending circumferentially, and the jack radially penetrates through the water outlet pipe; the water outlet connector is characterized by further comprising a water outlet connector and an inserting sheet, wherein one end of the water outlet connector can be inserted into the water outlet pipe in a circumferential rotation mode, an annular groove is formed in the outer periphery of the water outlet connector, the part of the annular groove is opposite to the inserting hole, and the inserting sheet is inserted into the inserting hole and is clamped into the annular groove to axially fix the water outlet connector.

5. A diaphragm pump for a beverage machine according to claim 3, wherein: the inserting piece is provided with two long arms, and the two long arms are respectively inserted into the inserting holes and clamped into the annular grooves.

6. A diaphragm pump for a beverage maker as claimed in claim 5, wherein: the inserting piece is also provided with a connecting part which is connected between one ends of the two long arms; and a tangential plane is arranged on one side of the jack, which is perpendicular to the insertion direction of the inserting piece, so that the connecting part is exposed.

7. A diaphragm pump for a beverage machine according to claim 1, wherein: the backflow pressure limiting device adopts a backflow cavity, and the backflow cavity is provided with the water through hole; a convex ring is arranged at the end of the reflux cavity of the water through hole, and the water sealing piece is abutted against the convex ring to seal the water through hole; the reflux driving assembly is arranged in the reflux cavity.

8. A diaphragm pump for a beverage machine according to claim 1, wherein: one end of the pump body is provided with a shell, and the water inlet cavity, the water outlet cavity and the backflow pressure limiting device are formed on the shell.

9. A diaphragm pump for a beverage machine according to claim 1, wherein: the motor is provided with an end cover and two carbon brushes, and two mounting holes are formed in the end cover; the two carbon brushes are detachably installed in the installation holes respectively.

10. A diaphragm pump for a beverage maker as claimed in claim 9, wherein: the carbon brush comprises a cover body, a brush body and a carbon brush bolt, wherein the brush body is positioned in the carbon brush bolt, the carbon brush bolt is detachably installed in the installation hole, and the cover body is fixed at the outer end of the carbon brush bolt.