CN213807968U

CN213807968U - Miniature oscillating reciprocating piston pump

Info

Publication number: CN213807968U
Application number: CN202023056291.6U
Authority: CN
Inventors: 娄施玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-07-27
Anticipated expiration: 2030-12-17

Abstract

The utility model relates to a miniature reciprocating piston pump that sways, the support of this pump is fixed on damping device, motor and two cylinders are fixed in the support, a link assembly and piston are connected respectively to motor both ends power shaft, two cylinder parallel arrangement, its characteristics are, this pump valve plate is a whole part, be provided with two check valves on this valve plate, this valve plate covers at two cylinder open ends, this pump end cover also is a whole, this end cover covers in the valve plate top and fixed and sealed with the valve plate with the support, inside cavity and the air duct of having of this end cover, this air duct is with the business turn over air cavity intercommunication of two cylinders. The utility model discloses a whole valve plate and whole end cover to at the internal gas tank that sets up of inner chamber of end cover, be used for communicateing the business turn over air cavity between two cylinders, thereby make the part reduce, compact structure, the dependable performance, the complete machine volume obtains further reducing.

Description

Miniature oscillating reciprocating piston pump

Technical Field

The utility model relates to a piston pump especially is a miniature reciprocating piston pump.

Background

The oscillating reciprocating piston compressor/vacuum pump has compact structure, less parts, high efficiency, long service life, low noise, no lubricating oil and no air pollution, and is applied widely especially in small pressure swing adsorption and vacuum field. However, in the existing double-cylinder reciprocating piston pump, the air passages of the double cylinders are communicated or connected by an additional pipeline, the structure has the problems of installation and sealing, or the pipeline is formed by adopting integral casting, but the integral casting has longer loose core, the casting mold is complicated, the processing technology is increased, and the cost is higher.

Disclosure of Invention

The utility model aims at improving the double-cylinder air passage structure of the miniature swing reciprocating piston pump and further reducing the volume.

In order to achieve the above object, the technical scheme of the utility model is, a miniature reciprocating piston pump that sways, its constitution is including damping device, support, motor, two cylinders, link assembly, piston, valve plate and check valve, end cover, and the support is fixed on damping device, and motor and two cylinders are fixed in the support, and a link assembly is connected respectively to motor both ends power shaft, two cylinder parallel arrangement, its characterized in that: the valve plate is an integral part, two one-way valve sets are arranged on the valve plate, the valve plate covers the opening ends of the two cylinders, the end cover is also an integral body, the end cover covers the upper portion of the valve plate, is fixed with the support and is sealed with the valve plate, a cavity and an air groove are formed in the end cover, and the air groove is used for communicating the air inlet cavity and the air outlet cavity of the two cylinders.

In the technical scheme, the connecting rod assembly comprises a connecting rod, a bearing and an eccentric wheel with a balance block, a piston is fixed at the upper end of the connecting rod, the center line of the piston is offset from the center line of the connecting rod, the eccentric wheel with the balance block is fixed with a power shaft of a motor, a rolling bearing is arranged on the periphery of the eccentric wheel, and the lower end of the connecting rod is sleeved on the periphery of the rolling bearing.

In the technical scheme, the damping device is composed of a spring pad, a spring and a spring seat, the spring is vertically arranged between the spring pad and the spring seat, and the distance between the upper end of the spring and the axis of the motor rotating shaft is smaller than the radius of the motor.

The utility model has the advantages that, at first, at the internal gas tank that sets up of an integral end cover part for the business turn over air cavity between two cylinders has both reduced the part, and the structure is compacter, and the leakproofness is better, processes more optimization, material saving, reduce cost, and the performance is more reliable, and makes the complete machine volume further reduce, more is favorable to it to use at small-size, portable and test instrument. Secondly, the center line of the piston is offset from the center line of the connecting rod, so that the unbalanced force moment generated by the balance block is offset or partially offset, and the two cylinders are close to the center, so that the structure of the whole machine is more compact. Moreover, the damping device is close to the rotating shaft of the motor and the distance is A, so that the gravity center of the whole machine is reduced, and the vibration is reduced.

Drawings

Fig. 1 is a schematic structural section view of the miniature oscillating reciprocating piston pump of the present invention.

Fig. 2 is a schematic view of the internal structure of the end cap of the miniature oscillating reciprocating piston pump of the present invention.

Fig. 3 is a left side sectional view of fig. 2.

Fig. 4 is a schematic structural view of a connecting rod assembly and a piston in the miniature oscillating reciprocating piston pump of the present invention.

In the above drawings, 1 is a spring pad, 2 is a spring, 3 is a spring seat, 4 is a motor, 5 is a bracket, 6 is a balance weight, 7 is a connecting rod assembly, 8 is a cylinder, 9 is a valve plate, 10 is a one-way valve, 11 is a sealing pad, 12 is an end cover, 13 is a bolt, 14 is a bearing, and 15 is a screw. 16 is an air inlet connector, 17 is an air outlet connector, 18 is an air cavity, 19 is an air groove, 20 is a piston, 21 is a connecting rod, 22 is a rolling bearing, 23 is a motor power shaft, and 24 is an eccentric wheel with a balance block.

Detailed Description

First embodiment, the structural section of the micro oscillating reciprocating piston pump of the present embodiment is shown in fig. 1.

In this embodiment, damping device comprises spring pad 1, spring 2 and spring holder 3, and spring 2 is vertically arranged in between spring pad 1 and the spring holder 3, and support 5 is fixed on damping device, and motor 4 and two cylinders 8 are fixed in support 5, and motor 4 both ends power shaft connects a link assembly 7 respectively, and two cylinders 8 parallel arrangement, two cylinder open ends are provided with a valve plate 9, are provided with two check valves 10 on this valve plate 9.

In this embodiment, the end cover 12 is an integral component, the end cover 12 covers and seals above the valve plate 9, the end cover 12 is fixed with the bracket 5, as shown in fig. 2 and fig. 3, an air groove 19 is opened in the inner cavity of the end cover 12, and the air groove 19 is communicated with the air cavity 18 and further communicated with the air inlet port 16 and the air outlet port 17.

In this embodiment, the connecting rod assembly is composed of a connecting rod 21, a rolling bearing 22, and an eccentric wheel 24 with a balance weight, the piston 20 is fixed at the upper end of the connecting rod 21, the eccentric wheel 24 is fixed with a power shaft 23 of a motor, the rolling bearing 22 is arranged on the periphery of the eccentric wheel, and the lower end of the connecting rod 21 is sleeved on the periphery of the rolling bearing 22. As shown in figure 4, the center line of the piston 20 is offset (offset as X) from the center line of the connecting rod 21, so that the unbalanced force moment generated by the balance block is offset or partially offset, and meanwhile, the two cylinders are close to the center, so that the whole structure is more compact.

Claims

1. The utility model provides a miniature reciprocating piston pump that sways, its constitution is including damping device, support, motor, two cylinders, link assembly, piston, valve plate and check valve, end cover, and the support is fixed on damping device, and motor and two cylinders are fixed in the support, and a link assembly is connected respectively to motor both ends power shaft, two cylinder parallel arrangement, its characterized in that: the valve plate is an integral part, two one-way valve sets are arranged on the valve plate, the valve plate covers the opening ends of the two cylinders, the end cover is also an integral body, the end cover covers the upper portion of the valve plate, is fixed with the support and is sealed with the valve plate, a cavity and an air groove are formed in the end cover, and the air groove is used for communicating the air inlet cavity and the air outlet cavity of the two cylinders.

2. A miniature rocking reciprocating piston pump as claimed in claim 1, in which: the connecting rod assembly consists of a connecting rod, a bearing and an eccentric wheel with a balance block, wherein the upper end part of the connecting rod is fixed with a piston, the center line of the piston is offset from the center line of the connecting rod, the eccentric wheel with the balance block is fixed with a power shaft of a motor, a rolling bearing is arranged on the periphery of the eccentric wheel, and the lower end of the connecting rod is sleeved on the periphery of the rolling bearing.

3. A miniature rocking reciprocating piston pump as claimed in claim 1, in which: the damping device is composed of a spring pad, a spring and a spring seat, the spring is vertically arranged between the spring pad and the spring seat, and the distance between the upper end of the spring and the axis of the motor rotating shaft is smaller than the radius of the motor.