CN208203517U - Run more stable Miniature diaphragm pump - Google Patents

Abstract

The utility model discloses a kind of Miniature diaphragm pumps that operation is more stable, including pump case, valve seat, link assembly is provided in pump case, diaphragm is provided between pump case and valve seat, the link assembly includes connecting rod, connecting rod front end includes extension arm, extension arm front end is respectively arranged with insertion section and support portion, insertion section is set at extension arm forward end, support portion, which is surround, to be set on the periphery wall of extension arm and is located at insertion section rear, annular crack is formed between insertion section and support portion, diaphragm includes movable part, positioning region and flexible joint, the movable part includes inner cavity, the rear end of movable part includes annular underdress, annular underdress includes circular hole, insertion section is inserted in inner cavity, the annular underdress is socketed in the annular crack, the support portion is evenly equipped at least two radial directions along its circumferential direction and prolongs The through slot stretched.The utility model structure is simple, easy for installation, it is not easy to it breaks down, it is stable.

Description

Run more stable Miniature diaphragm pump

Technical field

The utility model relates to a kind of Miniature diaphragm pumps.

Background technique

Miniature diaphragm pump can export compressed air, have compact, low noise, small power consumption, it is easily operated, convenient for taking The advantages that band, is usually used in domestic white small electric apparatus.

The Miniature diaphragm pump of the prior art generally comprises pump case, motor, valve seat, cover board, and motor is connected with pump case, The output shaft of motor is plugged in pump case, is provided with the link assembly being connected with motor output shaft in pump case, valve seat with Pump case connection, is provided with diaphragm between pump case and valve seat, pass through screw connection and company between link assembly and diaphragm Bar assembly is able to drive diaphragm and vibrates back and forth, and air valve piece is provided on valve seat, be respectively arranged on cover board air inlet pipe and Escape pipe corresponds to air-intake valve plate between cover board and valve seat, outlet valve block position is respectively formed with inlet chamber, outlet chamber, air inlet pipe It is connected with inlet chamber, escape pipe is connected with outlet chamber, and compression chamber is formed between valve seat and diaphragm.When air pump operates, It is of reciprocating vibration that motor can drive diaphragm to do by link assembly, changes the volume of compression chamber, then by air-intake valve plate, air outlet valve Air-breathing and aerification function are realized in the cooperation of piece.

The Miniature diaphragm pump of the prior art, generally by screw, nut, gasket etc. between diaphragm and link assembly Fastener is fixed to realize, the connection structure between diaphragm and link assembly is complicated, installation inconvenience and higher cost, and It is easy to appear the case where screw loosens after long-time service, so as to cause Joint failure between link assembly and diaphragm, makes connecting rod Component is unable to drive diaphragm movement, leads to the operational failure of pump.

Summary of the invention

In view of the deficiencies of the prior art, the utility model provides a kind of Miniature diaphragm pump that operation is more stable, structure Simply, the installation between diaphragm and link assembly is more convenient, and long-time service is not easy to break down, and runs more steady It is fixed.

To achieve the above object, the utility model provides a kind of Miniature diaphragm pump that operation is more stable, including pump case Body, motor, valve seat, cover board, motor are connected with pump case, and the output shaft of motor is plugged in pump case, are arranged in pump case There is the link assembly being connected with motor output shaft, valve seat is connect with pump case, diaphragm is provided between pump case and valve seat, Air valve piece is provided on valve seat, cover board is set to valve seat front end, and air inlet pipe and an air outlet pipe is respectively arranged on cover board, described Link assembly includes eccentric wheel, bearing and connecting rod, and rod rear end includes circular groove, and bearing is mounted in circular groove, and eccentric wheel is inserted It is mutually fixed in inner ring loaded on bearing and with motor output shaft, the connecting rod front end includes the extension extended towards diaphragm direction Arm, the extension arm are cylinder, and extension arm front end is respectively arranged with the support portion of discoidal insertion section and circular ring shape, insertion section It is coaxially disposed at extension arm forward end, the diameter of insertion section is slightly larger than extension arm, and the support portion surround and is set to extension Rear on the periphery wall of arm and positioned at insertion section, interval is formed with annular crack, the diaphragm between insertion section and support portion Piece includes the movable part positioned at center, the positioning region positioned at edge and is integrally connected to movable part and positioning region Between flexible joint, the positioning region is fixed between the pump case and valve seat, and the movable part includes one With the inner cavity of the insertion section shape adaptation, the rear end of movable part includes the annular underdress around extension arm setting, annular underdress Center include the circular hole worn for extension arm, the insertion section is inserted in inner cavity, it is described annular underdress be socketed on In the annular crack, the support portion is evenly equipped at least two through slots radially extended along its circumferential direction.

The beneficial effects of the utility model are: due to when insertion section plugs in the lumen movable part be capable of forming to insertion section Coating function, to inherently reach preliminary positioning, but due to the annular underdress of movable part rear end be socketed on insertion section and It is formed by between support portion in annular crack, by making between insertion section and support portion to the support of side before and after annular underdress With making annular underdress that can remain original shape in the motion process of diaphragm, annular underdress avoided to be inserted into portion Deformation causes circular hole to expand when press, keeps in the lumen without deviating from from circular hole with making insertion section all-the-time stable, thus Reach further positioning.The setting of through slot is socketed situation to annular underdress convenient for staff in annular crack and sees It examines, convenient for the assembly and adjustment of staff.

The utility model can be further arranged to: between the insertion section and inner cavity, between circular hole and extension arm and ring There are gap between shape underdress and support portion, the through slot can be used for the glue that instils, and glue can be along circular hole after through slot instillation Gap between extension arm is flowed into inner cavity and in the gap that is filled between insertion section and inner cavity, thus the glue solidifies The close connection being capable of forming between insertion section and movable part afterwards, the glue can also be flowed into annular underdress and branch along through slot In gap between support part, to be capable of forming the close connection between annular underdress and support portion after the glue solidifies.

By adopting the above technical scheme the advantages of is: the setting of through slot is in addition to being convenient for staff to annular underdress in marmon clamp Other than socket situation is observed in seam, instillation glue can also be convenient for, glue can be along circular hole and extension arm after through slot instillation Between gap be flowed into inner cavity and in the gap that is filled between insertion section and inner cavity, thus being capable of shape after the glue solidifies At the close connection between insertion section and movable part, the glue can also be flowed between annular underdress and support portion along through slot Gap in, to be capable of forming the close connection between annular underdress and support portion after the glue solidifies.By glue to slotting Enter portion, movable part and support portion to be bonded, three is made to be able to maintain close connection, to further improve link assembly The stability connected between diaphragm.

The utility model can be further arranged to: the radial width of the annular underdress is less than the radial width of support portion.

By adopting the above technical scheme the advantages of, is: the rear side of annular underdress being enable to be fully located at the sphere of action of support portion It is interior, further enhance the connection effect between link assembly and diaphragm.

Detailed description of the invention

Fig. 1 is the structure chart of the utility model embodiment；

Fig. 2 is the explosive view of the utility model embodiment；

Fig. 3 is the structure chart of link assembly in the utility model embodiment；

Fig. 4 is the structure chart 1 of the utility model embodiment interval diaphragm；

Fig. 5 is the structure chart 2 of the utility model embodiment interval diaphragm；

Fig. 6 is the structure chart 1 of connecting rod in the utility model embodiment；

Fig. 7 is the structure chart 2 of connecting rod in the utility model embodiment；

Fig. 8 is the cross-sectional view of the utility model embodiment；

Fig. 9 is the partial enlarged view of part A in Fig. 8.

Specific embodiment

A kind of embodiment of the more stable Miniature diaphragm pump of operation of the utility model is as shown in Figure 1 to 9: including pump case Body 1, motor 2, valve seat 3, cover board 4, motor 2 are connected with pump case 1, and the output shaft of motor 2 is plugged in pump case 1, pump case The link assembly being connected with 2 output shaft of motor is provided in body 1, valve seat 3 is connect with pump case 1, pump case 1 and valve seat 3 it Between be provided with diaphragm 5, air valve piece 6 is provided on valve seat 3, cover board 4 is set to 3 front end of valve seat, is respectively set on cover board 4 There are air inlet pipe 41 and escape pipe 42,6 position of air valve piece is corresponded between cover board 4 and valve seat 3 and is respectively formed with inlet chamber, outlet Chamber, air inlet pipe 41 are connected with inlet chamber, and escape pipe 42 is connected with outlet chamber, and the link assembly 7 includes eccentric wheel 71, axis 72 and connecting rod 73 are held, 73 rear end of connecting rod includes circular groove 731, and bearing 72 is mounted in circular groove 731, and eccentric wheel 71 is plugged in axis It holds in 72 inner ring and is mutually fixed with 2 output shaft of motor, 73 front end of connecting rod includes the extension extended towards 5 direction of diaphragm Arm 732, the extension arm 732 are cylinder, and 732 front end of extension arm is respectively arranged with discoidal insertion section 733 and circular ring shape Support portion 734, insertion section 733 are coaxially disposed at 732 forward end of extension arm, and the diameter of insertion section 733 is slightly larger than extension arm 732, the support portion 734 is around the rear for being set on the periphery wall of extension arm 732 and being located at insertion section 733, support portion 734 It is integrally formed with extension arm 732, interval is formed with annular crack 735, the diaphragm 5 between insertion section 733 and support portion 734 Including the movable part 51 positioned at center, the positioning region 52 positioned at edge and it is integrally connected to movable part 51 and determines Flexible joint 53 between position portion 52, the positioning region 52 are fixed between the pump case 1 and valve seat 3, movable part 51 connect with 732 front end of extension arm, and flexible joint 53 has certain deformability, the front and back under the drive of eccentric wheel 71 of connecting rod 73 Be able to drive when swing diaphragm 5 movable part 52 do it is of reciprocating vibration, so as to change the volume of compression chamber 31.The activity Portion 51 includes the inner cavity 54 of one Yu 733 shape adaptation of insertion section, and the rear end of movable part 51 includes setting around extension arm 732 The annular underdress 55 set, the center of annular underdress 55 include the circular hole 56 worn for extension arm 732, the insertion section 733 are inserted in inner cavity 54, and the annular underdress 55 is socketed in the annular crack 735, and the support portion 734 is along its circumferential direction It is evenly equipped at least two through slots 736 radially extended.Between the insertion section 733 and inner cavity 54, circular hole 56 and extension arm 732 it Between and annular underdress 55 and support portion 734 between there are gap, the through slot 736 can be used for the glue that instils, and glue is from logical Slot 736 instill after can the gap between circular hole 56 and extension arm 732 be flowed into inner cavity 54 and be filled in insertion section 733 with it is interior In gap between chamber 54, to be capable of forming the close connection between insertion section 733 and movable part 51, institute after the glue solidifies It states in the gap that glue can also be flowed between annular underdress 55 and support portion 734 along through slot, thus the energy after the glue solidifies Enough close connections formed between annular underdress 55 and support portion 734.The radial width of the annular underdress 55 is less than support portion 734 radial width.

Above example, only one kind of the utility model preferably specific example, those skilled in the art are practical new at this The usual variations and alternatives carried out in type technical proposal scope are included in the protection scope of the utility model.

Claims (3)

1. a kind of Miniature diaphragm pump that operation is more stable, including pump case, motor, valve seat, cover board, motor are connected with pump case It connects, the output shaft of motor is plugged in pump case, and the link assembly being connected with motor output shaft, valve seat are provided in pump case It is connect with pump case, diaphragm is provided between pump case and valve seat, air valve piece is provided on valve seat, cover board is set to valve Seat front end, is respectively arranged with air inlet pipe and an air outlet pipe on cover board, and the link assembly includes eccentric wheel, bearing and connecting rod, even Rod rear end includes circular groove, and bearing is mounted in circular groove, and eccentric wheel is plugged in the inner ring of bearing and mutually consolidates with motor output shaft It is fixed, it is characterised in that: the connecting rod front end includes the extension arm extended towards diaphragm direction, which is cylinder, is prolonged Long-armed front end is respectively arranged with the support portion of discoidal insertion section and circular ring shape, and insertion section is coaxially disposed in extension arm front end end At portion, the diameter of insertion section is slightly larger than extension arm, and the support portion, which is surround, to be set on the periphery wall of extension arm and be located at insertion The rear in portion, interval is formed with annular crack between insertion section and support portion, and the diaphragm includes the work positioned at center Dynamic portion, the positioning region positioned at edge and the flexible joint that is integrally connected between movable part and positioning region, it is described Positioning region is fixed between the pump case and valve seat, and the movable part includes one and the insertion section shape adaptation Inner cavity, the rear end of movable part include the annular underdress around extension arm setting, and the center of annular underdress includes for extending The circular hole that arm is worn, the insertion section are inserted in inner cavity, and the annular underdress is socketed in the annular crack, the support Portion is evenly equipped at least two through slots radially extended along its circumferential direction.

2. the more stable Miniature diaphragm pump of operation according to claim 1, it is characterised in that: the insertion section with it is interior Between chamber, between circular hole and extension arm and between annular underdress and support portion there are gap, the through slot can be used for instiling Glue, glue from through slot instillation after can the gap between circular hole and extension arm be flowed into inner cavity and be filled in insertion section with it is interior In gap between chamber, to be capable of forming the close connection between insertion section and movable part, the glue after the glue solidifies It can also be flowed into along through slot in the gap between annular underdress and support portion, to be capable of forming in annular after the glue solidifies Close connection between skirt and support portion.

3. running more stable Miniature diaphragm pump according to claim 1 or described in 2, it is characterised in that: in the annular The radial width of skirt is less than the radial width of support portion.