Transmission connection mechanism for micro diaphragm pump and micro diaphragm pump

Abstract

The utility model provides a miniature diaphragm pump and a transmission connection mechanism for the miniature diaphragm pump, relates to diaphragm pump technical field, including motor, casing, eccentric wheel and swing frame, said motor with said casing is fixed, its motor shaft extends into said casing from the bottom surface of said casing, said eccentric wheel is sleeved on said motor shaft, said swing frame is fixed in said casing. The eccentric wheel is arranged on the swing frame and used for driving the swing frame to swing, the outer side of the eccentric wheel is sleeved with a first buffering piece, and the first buffering piece is contained in a containing groove of the shell and attached to the side wall of the containing groove so that radial force acting on the eccentric wheel can be transmitted to the shell. Therefore, radial force acting on the motor shaft is reduced, and stable operation and service life of the motor are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a diaphragm pump technical field, specifically, a kind of transmission connecting mechanism and micro diaphragm pump for micro diaphragm pump. BACKGROUND

[0002] The existing micro diaphragm pump generally utilizes motor to drive diaphragm swing to realize the suction and output of fluid. For example, a gas-liquid vacuum integrated micro diaphragm pump disclosed in Chinese patent CN208718897U includes a motor, a base, an eccentric wheel, a shaft, a swing frame, a diaphragm bell cup, a diaphragm seat, a one-way valve piece, a valve seat and an upper cover. The motor is installed on the base, the output shaft of the motor extends into the base to connect the center hole of the eccentric wheel, the eccentric wheel is provided with an inclined hole for accommodating the shaft, the other side of the shaft is fixedly connected with the swing frame, the diaphragm bell cup is placed in the corresponding diaphragm seat hole, the bottom of the diaphragm bell cup is connected with the swing frame, and the one-way valve piece is installed on the valve seat. Due to the radial force generated during the transmission of the eccentric wheel and the swing frame, the motor shaft is subjected to radial force and radial jump, which increases the vibration and noise of the motor during operation, thereby affecting the stable operation and service life of the motor. SUMMARY

[0003] The utility model discloses a transmission connecting mechanism of micro diaphragm pump, aims at improving the problem that the radial force that motor shaft is subjected to is larger in the structure of the existing micro diaphragm pump, and easily affects the operation and service life of motor.

[0004] The utility model discloses a transmission connecting mechanism of micro diaphragm pump, aims at improving the problem that the radial force that motor shaft is subjected to is larger in the structure of the existing micro diaphragm pump, and easily affects the operation and service life of motor.

[0005] A transmission connecting mechanism for a micro diaphragm pump includes a motor, a housing, an eccentric wheel and a swing frame. The motor is fixed to the housing, and the motor shaft extends from the bottom surface of the housing into the housing. The eccentric wheel is sleeved on the motor shaft to drive the swing frame to swing. The outer side of the eccentric wheel is sleeved with a first buffer, which is accommodated in the accommodating groove of the housing and is in contact with the side wall of the accommodating groove, so that the radial force acting on the eccentric wheel can be transmitted to the housing.

[0006] As a further improvement, the end of the eccentric wheel connected with the swing frame is sleeved with a second buffer.

[0007] As a further improvement, a first limiting surface and a second limiting surface are provided on the outer wall of the eccentric wheel. The first buffer is limited between the first limiting surface and the bottom surface of the accommodating groove, and the second buffer is limited between the second limiting surface and the abutting surface of the swing frame.

[0008] As a further improvement, the first buffer member and the second buffer member are respectively arranged at two ends of the eccentric wheel.

[0009] As a further improvement, the first buffer member and the second buffer member are both ball bearings.

[0010] As a further improvement, the eccentric wheel is provided with chamfers at upper and lower ends thereof.

[0011] As a further improvement, the accommodating groove is formed in the inner side of the bottom of the shell.

[0012] As a further improvement, the height of the eccentric wheel is greater than the length of the motor shaft.

[0013] As a further improvement, the shell and the motor are fixed by screws, the motor shaft is provided with a limiting surface, and the eccentric wheel has a positioning hole adapted to the motor shaft.

[0014] The utility model also provides a micro diaphragm pump which comprises a water pump assembly and a transmission connecting mechanism for the micro diaphragm pump as claimed in any one of the above.

[0015] By adopting the above technical scheme, the utility model can achieve the following technical effects:

[0016] 1. The radial force is generated in the process of swinging of the swing frame and the process of rotation of the eccentric wheel, the first buffer member is arranged to share part of the radial force and to transmit the radial force to the shell, thereby reducing the radial force acting on the motor shaft, reducing the vibration and noise of the motor, and ensuring the stable operation and service life of the motor.

[0017] 2. The end of the eccentric wheel connected with the swing frame is sleeved with the second buffer member to further reduce the radial force acting on the eccentric wheel. Preferably, the first buffer member and the second buffer member are both ball bearings and are respectively arranged at two ends of the eccentric wheel, so that the radial force acts on the ball bearings and is prevented from being transmitted to the motor shaft, and the dry friction between the swing frame and the eccentric wheel is also avoided, thereby improving the transmission efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Figure 1 is a sectional view of one embodiment of the utility model;

[0020] Figure 2 is a structure schematic view of the shell of one of the embodiments of the utility model;

[0021] Figure 3 is a structure schematic view of the shell and motor connection of one of the embodiments of the utility model;

[0022] Figure 4 is Figure 3 sectional view along one section;

[0023] Figure 5 is a structure schematic view of the eccentric wheel and motor and shell connection of one of the embodiments of the utility model;

[0024] Figure 6 is Figure 5 sectional view along one section.

[0025] icon:

[0026] 1-motor; 11-motor shaft; 111-limiting section;

[0027] 2-shell; 21-receiving groove; 22-mounting hole;

[0028] 3-eccentric wheel; 31-first limiting surface; 32-second limiting surface; 33-positioning hole;

[0029] 4-pendulum frame;

[0030] 5-first buffer;

[0031] 6-second buffer;

[0032] 7-cover;

[0033] 8-screw;

[0034] 9-diaphragm; 91-chamber. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. Embodiment

[0036] In conjunction with Figures 1 to 6 The present embodiment provides a transmission connecting mechanism for a micro diaphragm pump, comprising a motor 1, a shell 2, an eccentric wheel 3 and a swing frame 4. The motor 1 is fixed with the shell 2, and the motor shaft 11 of the motor 1 extends from the bottom surface of the shell 2 into the shell 2. The eccentric wheel 3 is sleeved on the motor shaft 11 to drive the swing frame 4 to swing. The outer side of the eccentric wheel 3 is sleeved with a first buffer 5, which is accommodated in the accommodating groove 21 of the shell 2 and abuts with the side wall of the accommodating groove 21, so that the radial force acting on the eccentric wheel 3 can be transmitted to the shell 2.

[0037] It should be noted that in the present embodiment, the radial force is defined as the force perpendicular to the direction of the motor shaft 11. The swing frame 4 will generate a radial force during swinging and the eccentric wheel 3 will generate a radial force during rotation. By arranging the first buffer 5, part of the radial force can be shared, and the radial force can be transmitted to the shell 2, thereby reducing the radial force acting on the motor shaft 11, reducing the vibration and noise of the motor 1, and ensuring the stable operation and service life of the motor 1.

[0038] In a preferred embodiment, the second buffer 6 is sleeved on the end of the eccentric wheel 3 connected with the swing frame 4, so as to further reduce the radial force acting on the eccentric wheel 3. Specifically, the first buffer 5 and the second buffer 6 are arranged at the two ends of the eccentric wheel 3 respectively. The outer wall of the eccentric wheel 3 is provided with a first limiting surface 31 and a second limiting surface 32, the first buffer 5 is limited between the first limiting surface 31 and the bottom surface of the accommodating groove 21, and the second buffer 6 is limited between the second limiting surface 32 and the abutting surface of the swing frame 4. Preferably, the first buffer 5 and the second buffer 6 are both ball bearings. The radial force generated on the swing frame 4 acts on the ball bearings, so as to avoid being transmitted to the motor shaft 11, and also avoid dry friction between the swing frame 4 and the eccentric wheel 3, thereby improving the transmission efficiency. The upper and lower ends of the eccentric wheel 3 are both provided with chamfers, the first buffer 5 is sleeved from the bottom of the eccentric wheel 3, and the second buffer 6 is sleeved from the top of the eccentric wheel 3, so that the chamfers at the two ends are beneficial to installation and avoid scratching the buffers. The other end of the swing frame 4 away from the eccentric wheel 3 is limited by the cover 7, so as to limit the eccentric wheel 3 in the axial direction. In other embodiments, the first buffer 5 can also be an elastic member such as rubber or silicone, and is not limited to this.

[0039] On the basis of the above-mentioned embodiments, in an optional embodiment of the utility model, the accommodating groove 21 is formed in the bottom inner side of the shell 2, so that the first buffer 5 is arranged close to the bottom of the motor shaft 11. Further, the height of the eccentric wheel 3 is greater than the length of the motor shaft 11, wherein the motor shaft 11 protrudes a short length and is sleeved in the eccentric wheel 3, so as to ensure the stability of motion transmission and reduce the possibility of bending deformation of the motor shaft 11.

[0040] Illustratively, the shell 2 is provided with a mounting hole 22, the motor 1 is provided with a screw hole, the shell 2 and the motor 1 are fixed through a screw 8, the motor shaft 11 is provided with a limiting section 111, and the eccentric wheel 3 has a positioning hole 33 matched with the motor shaft 11. Specifically, the cross-sectional shape of the motor shaft 11 is semicircular, and the shape of the positioning hole 33 is similar to the cross-sectional shape of the motor shaft 11, so that the motor shaft 11 can drive the eccentric wheel 3 to rotate.

[0041] Another embodiment of the utility model provides a micro diaphragm pump, which comprises a water pump assembly and a transmission connecting mechanism for the micro diaphragm pump as described in any one of the above embodiments and connected with the water pump assembly. Illustratively, the water pump assembly comprises at least two diaphragms 9, each diaphragm 9 is formed with a chamber 91, wherein each diaphragm 9 is connected with the swing frame 4, the eccentric wheel 3 is driven to rotate by the motor 1, so that the swing frame 4 swings correspondingly, thereby stretching or extruding the chamber 91 on the diaphragm 9, and realizing the suction and discharge of liquid or gas. The structure and working principle of the water pump assembly are prior art, and will not be described here.

[0042] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical scheme falling within the concept of the present application belongs to the protection scope of the present application.

Claims

1. A drive connection mechanism for a micro-diaphragm pump, characterized in that, The device comprises a motor, a housing, an eccentric wheel and a swing frame. The motor is fixed to the housing, and the motor shaft extends from the bottom surface of the housing into the housing. The eccentric wheel is sleeved on the motor shaft to drive the swing frame to swing. The outer side of the eccentric wheel is sleeved with a first buffer, which is accommodated in the accommodating groove of the housing and is in contact with the side wall of the accommodating groove, so that the radial force acting on the eccentric wheel can be transmitted to the housing. The first buffer is a rubber or silicone buffer.

2. A drive connection mechanism for a micro-diaphragm pump according to claim 1, characterized in that, The end of the eccentric wheel connected with the swing frame is sleeved with a second buffer.

3. A drive connection mechanism for a micro-diaphragm pump according to claim 2, characterized in that, The outer wall of the eccentric wheel is provided with a first limiting surface and a second limiting surface. The first buffer is limited between the first limiting surface and the bottom surface of the accommodating groove, and the second buffer is limited between the second limiting surface and the abutting surface of the swing frame.

4. A drive connection mechanism for a micro-diaphragm pump according to claim 2, characterized in that, The first buffer and the second buffer are respectively arranged at the two ends of the eccentric wheel.

5. A transmission connection mechanism for a micro-diaphragm pump according to any one of claims 2 to 4, characterized in that, The second buffer is a ball bearing.

6. A drive connection mechanism for a micro-diaphragm pump according to claim 5, characterized in that, The upper and lower ends of the eccentric wheel are both provided with chamfers.

7. A drive connection mechanism for a micro-diaphragm pump according to claim 1, characterized in that, The accommodating groove is formed on the inner side of the bottom of the housing.

8. A drive connection mechanism for a micro-diaphragm pump according to claim 1, characterized in that, The height of the eccentric wheel is greater than the length of the motor shaft.

9. A drive connection mechanism for a micro-diaphragm pump according to claim 1, characterized in that, The housing and the motor are fixed by screws. The motor shaft is provided with a limiting surface, and the eccentric wheel has a positioning hole matched with the motor shaft.

10. A micro-diaphragm pump characterized by, The device comprises a water pump assembly and a transmission connection mechanism for a micro diaphragm pump connected with the water pump assembly.

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