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CN-121976940-A - Diaphragm pump

CN121976940ACN 121976940 ACN121976940 ACN 121976940ACN-121976940-A

Abstract

The application relates to the technical field of diaphragm pumps, in particular to a diaphragm pump which comprises a motor, a pump body, a clutch gear assembly and a diaphragm suction and discharge assembly, wherein the motor is arranged on the outer wall of the pump body, an output shaft of the motor penetrates through the outer wall of the pump body, the clutch gear assembly is arranged in the pump body, an output shaft of the motor is connected with one end of the clutch gear assembly, the diaphragm suction and discharge assembly is arranged in the pump body, the other end of the clutch gear assembly is connected with the diaphragm suction and discharge assembly, and the clutch gear assembly is used for driving the diaphragm suction and discharge assembly to suck and discharge, so that the problem that radial shaking is easy to occur in the eccentric rotation process is solved, and the precision and reliability of the diaphragm pump are improved.

Inventors

  • CHEN MINGYANG
  • LI QICHENG
  • ZHANG CHENG
  • LIANG YU
  • ZHONG ZHIGANG
  • ZENG XIN

Assignees

  • 深圳市恒永达科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260331

Claims (10)

  1. 1. The diaphragm pump is characterized by comprising a motor (1), a pump body (2), a clutch gear assembly (3) and a diaphragm suction and discharge assembly (4); The motor (1) is arranged outside the pump body (2), and an output shaft of the motor extends into the pump body (2); The clutch gear assembly (3) comprises a first clutch gear (31), a second clutch gear (32) and a spring (33), wherein the first clutch gear (31) is coaxially connected to the outside of an output shaft of the motor (1), one end of the second clutch gear (32) is detachably connected with the first clutch gear (31), the other end of the second clutch gear (32) is connected with the diaphragm suction and discharge assembly (4), and the spring (33) is arranged between the second clutch gear (32) and the pump body (2); The motor (1) drives the diaphragm suction and discharge assembly (4) to reciprocate through the clutch gear assembly (3) to suck and discharge.
  2. 2. The diaphragm pump according to claim 1, wherein a tooth surface (34) is provided at an end of the first clutch gear (31) opposite to the second clutch gear (32), the first clutch gear (31) and the second clutch gear (32) are engaged by the tooth surface (34), and the first clutch gear (31) is configured to drive the second clutch gear (32) to perform axial displacement by rotation.
  3. 3. A diaphragm pump according to claim 2, characterized in that the axial displacement distance of the second clutch gear (32) is the depth of the tooth flank (34).
  4. 4. The diaphragm pump according to claim 1, wherein one end of the first clutch gear (31) and one end of the second clutch gear (32) which are opposite are provided with inclined surfaces, the first clutch gear (31) and the second clutch gear (32) are abutted through the inclined surfaces, and the first clutch gear (31) is used for driving the second clutch gear (32) to axially displace through rotation.
  5. 5. Diaphragm pump according to claim 1, characterized in that a limiting hole (21) for limiting the second clutch gear (32) is provided in the pump body (2), and the second clutch gear (32) is slidingly connected to the limiting hole (21).
  6. 6. The diaphragm pump according to claim 1, wherein the diaphragm suction and discharge assembly (4) comprises a diaphragm (41) and a suction and discharge member (42), the suction and discharge member (42) is connected with one end of the pump body (2) away from the motor (1), the diaphragm (41) is mounted between the suction and discharge member (42) and the pump body (2), and the diaphragm (41) is fixedly connected with the second clutch gear (32).
  7. 7. The diaphragm pump according to claim 6, wherein the suction and exhaust member (42) comprises a first cavity (421), a second cavity (422), a sealing ring (423) and at least two umbrella valves (424), the first cavity (421) is connected with one end of the pump body (2) away from the motor (1), the diaphragm (41) is mounted between the first cavity (421) and the pump body (2), the second cavity (422) is fixedly connected with one end of the first cavity (421) away from the pump body (2), the sealing ring (423) is mounted between the first cavity (421) and the second cavity (422), the first cavity (421) is provided with a ventilation flow passage (4211) for penetrating through both ends, and the umbrella valves (424) are mounted in the ventilation flow passage (4211).
  8. 8. Diaphragm pump according to claim 7, characterized in that the pump body (2) is provided with a working chamber (22), the diaphragm (41) being located between the working chamber (22) and the first chamber (421).
  9. 9. The diaphragm pump of claim 8, wherein the first chamber (421) is provided with a drive chamber (4212), the drive chamber (4212) being located on a side of the diaphragm (41) remote from the working chamber (22), the drive chamber (4212) being in communication with the second chamber (422) through the vent flow channel (4211); The second cavity (422) is provided with a suction cavity (4221) and a discharge cavity (4222), the suction cavity (4221) and the discharge cavity (4222) respectively penetrate through two ends of the second cavity (422), and the suction cavity (4221) and the discharge cavity (4222) are communicated with the driving cavity (4212) through the ventilation flow channel (4211).
  10. 10. The diaphragm pump of claim 9, wherein the umbrella valve (424) comprises a fixed portion (4241) and an opening and closing portion (4242), the fixed portion (4241) is fixedly connected to the ventilation flow channel (4211), the opening and closing portion (4242) of at least one umbrella valve (424) is abutted to one end of the ventilation flow channel (4211) close to the driving cavity (4212), and the opening and closing portion (4242) of at least one umbrella valve (424) is abutted to one end of the ventilation flow channel (4211) close to the discharging cavity (4222).

Description

Diaphragm pump Technical Field The application relates to the technical field of diaphragm pumps, in particular to a diaphragm pump. Background As a key fluid conveying element in industrial automation and refinement production processes, miniature diaphragm pumps are increasingly used in various fields such as industrial and agricultural production, environmental monitoring, medical equipment, analytical instruments and the like. With the continuous improvement of the industrial automation level, the performance requirements of the diaphragm pump are gradually improved, and especially the requirements of output stability, operation reliability and consistency under long-term working conditions are more strict. In the current micro diaphragm pump technical system, the design of a transmission structure directly influences the core performance of the pump, and currently, eccentric wheel transmission is generally used, and a motor is used for driving the eccentric wheel to rotate so as to convert rotary motion into reciprocating linear motion of a diaphragm, thereby realizing the suction and discharge of fluid. However, in practical application, under the condition of continuous rotary motion of the eccentric wheel, unexpected shaking phenomenon is easy to generate in radial direction due to asymmetric geometric characteristics and stress characteristics, radial shaking can be directly transmitted to the connected push rod and the diaphragm assembly, fluctuation of the pumping stroke of the diaphragm in each working period is caused, consistency is difficult to maintain, the stability of instantaneous flow and pressure can be influenced due to the reduction of stroke consistency, additional vibration and noise can be caused, abrasion of key components is accelerated, the overall efficiency of the pump and the accuracy of test results are restricted, and the problems are to be solved. Disclosure of Invention In order to solve the problem that radial shaking is easy to generate in the eccentric wheel rotating process and improve the precision and reliability of a diaphragm pump, the application provides the diaphragm pump, which adopts the following technical scheme: The application provides a diaphragm pump which comprises a motor, a pump body, a clutch gear assembly and a diaphragm suction and discharge assembly, wherein the motor is arranged on the pump body; The motor is arranged outside the pump body, and an output shaft of the motor extends into the pump body; The clutch gear assembly comprises a first clutch gear, a second clutch gear and a spring, the first clutch gear is coaxially connected outside an output shaft of the motor, one end of the second clutch gear is detachably connected with the first clutch gear, the other end of the second clutch gear is connected with the diaphragm suction and discharge assembly, and the spring is arranged between the second clutch gear and the pump body; and the motor drives the diaphragm suction and discharge assembly to reciprocate through the clutch gear assembly to suck and discharge. Preferably, a tooth surface is arranged at one end, opposite to the first clutch gear, of the second clutch gear, the first clutch gear and the second clutch gear are meshed through the tooth surface, and the first clutch gear is used for driving the second clutch gear to axially displace through rotation. Preferably, the axial displacement distance of the second clutch gear is the depth of the tooth surface. Preferably, one end of the first clutch gear, which is opposite to the second clutch gear, is provided with an inclined plane, the first clutch gear and the second clutch gear are abutted through the inclined plane, and the first clutch gear is used for driving the second clutch gear to axially displace through rotation. Preferably, a limiting hole for limiting the second clutch gear is formed in the pump body, and the second clutch gear is connected to the limiting hole in a sliding mode. Preferably, the diaphragm suction and discharge assembly comprises a diaphragm and a suction and discharge piece, the suction and discharge piece is connected with one end, far away from the motor, of the pump body, the diaphragm is installed between the suction and discharge piece and the pump body, and the diaphragm is fixedly connected with the second clutch gear. Preferably, the suction and exhaust piece comprises a first cavity, a second cavity, a sealing ring and at least two umbrella valves, wherein the first cavity is connected with one end of the pump body away from the motor, the diaphragm is installed between the first cavity and the pump body, the second cavity is fixedly connected with one end of the first cavity away from the pump body, the sealing ring is installed between the first cavity and the second cavity, the first cavity is provided with a ventilation flow passage for penetrating through two ends, and the umbrella valves are installed in the ventilation flow passage. Pr