CN215058835U

CN215058835U - Eccentric wheel device for miniature air pump

Info

Publication number: CN215058835U
Application number: CN202121283341.6U
Authority: CN
Inventors: 廖雪华
Original assignee: Xiamen Jingyoupin Technology Co ltd
Current assignee: Xiamen Jingyoupin Technology Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-12-07
Anticipated expiration: 2031-06-09

Abstract

The utility model discloses an eccentric wheel device for miniature air pump. The eccentric wheel device includes the body that extends along axial direction, the inclined hole is established to the body, the open end of inclined hole is located body axial one end, the blind end of inclined hole is located the axial other end of body, wherein, body one side is established out and is annotated the oil pocket, makes things convenient for the replenishment of lubricating oil, the inclined hole wall has the oil groove of leading of spiral extension, inclined hole wall bottom has the oil storage chamber, annotate the oil pocket with lead the oil groove intercommunication. Not only increased eccentric wheel device's oil reserve, partial oil mass, reduced the machine and maintained the frequency, be favorable to reducing the friction that steel needle and inclined hole produced moreover and lead to mechanical transmission's efficiency to reduce and precision structural damage, the axial one end of body still is equipped with radial evagination, has solved because the eccentric wheel leads to the unstable problem of structure because rotatory focus does not produce the vibration on the center pin, has improved eccentric wheel device's life.

Description

Eccentric wheel device for miniature air pump

Technical Field

The utility model relates to an eccentric wheel technical field especially relates to an eccentric wheel device for miniature air pump.

Background

Eccentric wheels, as the name implies, mean that the center of the wheel is not at the point of rotation, generally circular wheels are used, and when a circle does not rotate around its own center, an eccentric wheel is formed. The eccentric wheel of the miniature air pump is used for being connected with a motor shaft and is connected with a connecting rod assembly through a steel needle, the motor drives the eccentric wheel and the connecting rod to vibrate to drive the diaphragm to reciprocate, and the eccentric wheel and the valve plate of the air inlet and outlet hole form a complete air pumping and discharging motion.

The Chinese patent document publication No. CN210919403U discloses an eccentric wheel and a micropump for a micropump, wherein the micropump is composed of a motor, an eccentric wheel, a steel needle, a connecting rod assembly and an air hole valve plate, the eccentric wheel is installed in the micropump, and the eccentric wheel is connected with a motor shaft and the steel needle.

Eccentrics are commonly used in mechanical structures to produce reciprocating motion. The eccentric wheel of conventional structure, the loss of lubricating oil is fast, and friction is repeated between steel needle and the eccentric wheel easily converts mechanical energy into the efficiency that internal energy reduces miniature air pump, and the structure is easy wearing and tearing, need maintain the frequency height, because the steel needle can be inserted in the inclined hole, causes rotatory focus skew geometric center, and the equilibrium is poor, and easy vibration influences mechanical transmission's efficiency and precision structural damage. And the service life of the miniature air pump is easily influenced by abrasion.

In view of the above, there is a need for an eccentric wheel to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model aims to solve the technical problem that an eccentric wheel device is proposed, the equilibrium of this eccentric wheel, stability is good, and the maintenance frequency is low, and difficult wearing and tearing influence mechanical transmission's efficiency and precision structure, long service life.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides an eccentric wheel device for miniature air pump, eccentric wheel device includes the body, the inclined hole is established to the body, the open end of inclined hole is located body axial one end, the blind end of inclined hole is located the axial other end of body, body one side is established out and is annotated the oil pocket, wherein the wall of inclined hole has the oil groove of leading of spiral extension, inclined hole lateral wall bottom has the oil storage chamber, annotate the oil pocket with lead the oil groove intercommunication.

The utility model discloses preferred technical scheme lies in, the oiling import of annotating the oil pocket is located the top of annotating the oil pocket, the oil-out of annotating the oil pocket is located the bottom of annotating the oil pocket and leads the oil groove intercommunication.

The utility model discloses preferred technical scheme lies in, the lateral wall face of inclined hole has the follow the oil groove is led to the heliciform that the inclined hole bottom extended to the inclined hole port.

The utility model discloses preferred technical scheme lies in, the diameter in oil storage chamber is greater than the diameter of inclined hole.

The utility model discloses preferred technical scheme lies in, the body still has the shaft hole, the central axis's of inclined hole the extension line with the central axis's in shaft hole extension line is crossing.

The utility model discloses preferred technical scheme lies in, a crack prevention hole has still been constructed to the body, crack prevention hole sets up shaft hole one side, and with the shaft hole intercommunication, the diameter scales up from top side to bottom side.

The utility model discloses preferred technical scheme lies in, body one side is equipped with radial evagination, radial evagination with the inclined hole is located the both sides in shaft hole.

The utility model has the advantages that: the utility model provides an eccentric wheel device for miniature air pump, eccentric wheel device includes the body, the inclined hole is established to the body, the open end of inclined hole is located body axial one end, the blind end of inclined hole is located the axial other end of body, body one side is established out and is annotated the oil pocket, makes things convenient for the replenishment of lubricating oil, the wall of inclined hole has the oil groove of leading of spiral extension, inclined hole lateral wall bottom has the oil storage chamber, annotate the oil pocket with lead the oil groove intercommunication. Not only increased eccentric wheel device's oil storage capacity, partial oil mass, reduced the machine and maintained the frequency, be favorable to reducing the friction that steel needle and inclined hole produced moreover and lead to mechanical transmission's efficiency to reduce and precision structural damage, the axial one end of body still is equipped with radial evagination, radial evagination with the inclined hole is located the both sides in shaft hole have solved because the eccentric wheel leads to the unstable problem of structure owing to the vibration that rotatory focus does not produce on the center pin, have improved eccentric wheel device's life.

Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.

Fig. 1 is a top view of an eccentric wheel provided in an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an isometric view of an eccentric provided in an embodiment of the present invention;

fig. 4 is an exploded view of a micro air pump according to an embodiment of the present invention.

In the figure:

a body 10; an inclined hole 11; an oil injection chamber 111; an oil guide groove 112; an oil reservoir chamber 113; a shaft hole 12; an anti-cracking hole 13; a radially outer protrusion 14; a motor 20; a housing 30; a steel needle 40; a connecting rod assembly 50; a membrane 60; and into and out of the air holes 70.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1-3, the utility model provides an eccentric wheel device for miniature air pump, eccentric wheel device includes body 10, inclined hole 11 is established to the body, the open end of inclined hole 11 is located body 10 axial one end, the blind end of inclined hole 11 is located the axial other end of body 10, body one side is established and is annotated oil pocket 111, wherein the wall of inclined hole 11 has the oil groove 112 of leading of spiral extension, inclined hole 11 side wall face bottom has oil storage chamber 113, annotate oil pocket 111 with lead oil groove 112 intercommunication. The oil injection inlet of the oil injection cavity 111 is positioned at the top of the oil injection cavity 111, and the oil outlet of the oil injection cavity 111 is positioned at the bottom of the oil injection cavity 111 and is communicated with the oil guide groove 112.

Preferably, the oil injection cavity 111 may be used for supplementing lubricating oil, and the lubricating oil is supplemented through an inlet of the oil injection cavity 111, so that it is more convenient and faster, and a plug is disposed at the inlet of the oil injection cavity 111 to ensure that the lubricating oil is not easily lost due to the centrifugal force generated when the body 10 rotates.

Preferably, the side wall surface of the inclined hole is provided with a spiral oil guide groove extending from the bottom of the inclined hole to the port of the inclined hole. Lubricating oil enters the oil guide groove 112 through the outlet of the oil injection cavity 111, the lubricating oil in the oil guide groove 112 can be gradually released to the matching surface of the inclined hole 11 and the steel needle 40, the partial oil rate of the lubricating oil is improved, the lubricating effect is achieved, the friction force between the inclined hole 11 and the steel needle 40 is reduced, and therefore the damage of the mechanical energy loss of the motor 20 and the damage of the structure precision caused by the abrasion of the matching surface due to the excessive friction force are avoided.

Preferably, the oil storage cavity 113 can store more lubricating oil in advance, so that sufficient oil quantity is ensured, and the maintenance frequency of the machine is reduced.

Preferably, one side of the body 10 is provided with a radial outward protrusion 14, and the radial outward protrusion 14 and the inclined hole 11 are located on two sides of the shaft hole. Because the shaft hole 11 deviates to one side, the deviation of the rotation center from the geometric center is caused, the balance is poor, the vibration is easy, the mechanical transmission efficiency and the precision structure damage are influenced, the radial outward bulge 14 arranged on the body 10 can play a balance role, and the stability of the eccentric wheel device body 10 in the rotation process is improved.

Preferably, the shaft of the motor 20 is inserted into the shaft hole 12 to generate a large pressing force on the top wall of the shaft hole 12, and the eccentric wheel device body 10 is prone to bursting. The body 10 is further provided with an anti-cracking hole 13, and the anti-cracking hole 13 penetrates through one axial end of the body 10 and is communicated with the shaft hole 12. The anti-cracking hole 13 can increase the anti-extrusion capacity of the eccentric wheel device body 10 and prevent the body 10 from cracking.

The application relates to an eccentric wheel device operating principle for a miniature air pump:

in operation, refer to fig. 4, describe according to the utility model discloses an eccentric wheel device body 10 for miniature air pump, body 10 have with motor 20 pivot complex shaft hole 12, body 10 still have with steel needle 40 swing joint's inclined hole 11, steel needle 40's the other end with link assembly 50 connects, link assembly 50 with diaphragm 60 connects, thereby pass through motor 20 drive eccentric wheel device body 10 around with shaft hole 12 with the nodical rotation that is the center pin that inclined hole 11 extends drives link assembly 50 makes diaphragm 60 is reciprocating swing compressed gas from top to bottom forms the pressure differential, under the effect of pressure differential, with a complete gassing motion is constituteed to business turn over gas pocket 70.

Wherein the casing 30 is connected to the eccentric wheel apparatus body 10; a motor 20; a housing 30; a steel needle 40; a connecting rod assembly 50; a membrane 60; and a complete micro air pump is formed outside the air inlet and outlet 70. The shape and connection of the "connecting rod assembly 50" and the "diaphragm 60" are known to those skilled in the art and will not be described in detail herein.

The above embodiments are merely for illustrating the technical solutions of the present invention and are not to be construed as limiting, and the present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all the modifications and equivalents should be covered by the scope of the claims of the present invention.

Claims

1. An eccentric wheel device for a miniature air pump comprises a body (10) and is characterized in that:

body (10) constitute inclined hole (11), the open end of inclined hole (11) is located body (10) axial one end, the blind end of inclined hole (11) is located body (10) axial other end, body (10) one side constitutes and annotates oil pocket (111), wherein the wall of inclined hole (11) has oil groove (112) of leading that the spiral extends, inclined hole (11) side wall face bottom has oil storage chamber (113), annotate oil pocket (111) with lead oil groove (112) intercommunication.

2. The eccentric wheel apparatus for a micro air pump according to claim 1, wherein: an oil injection inlet of the oil injection cavity (111) is positioned at the top of the oil injection cavity (111), and an oil outlet of the oil injection cavity (111) is positioned at the bottom of the oil injection cavity (111) and communicated with the oil guide groove (112).

3. The eccentric wheel apparatus for a micro air pump according to claim 1, wherein: the side wall surface of the inclined hole (11) is provided with a spiral oil guide groove (112) extending from the bottom of the inclined hole (11) to the port of the inclined hole (11).

4. The eccentric wheel apparatus for a micro air pump according to claim 1, wherein: the diameter of the oil storage cavity (113) is larger than that of the inclined hole (11).

5. The eccentric wheel apparatus for a micro air pump according to claim 1, wherein: the body (10) is also provided with a shaft hole (12), and the extension line of the central axis of the inclined hole (11) is intersected with the extension line of the central axis of the shaft hole (12).

6. The eccentric wheel apparatus for a micro air pump according to claim 5, wherein: the anti-cracking device is characterized in that the body (10) is further provided with an anti-cracking hole (13), the anti-cracking hole (13) is formed in one side of the shaft hole (12), is communicated with the shaft hole (12), and is increased in diameter from the top side to the bottom side.

7. The eccentric wheel apparatus for a micro air pump according to claim 5, wherein: one side of the body (10) is provided with a radial outward protrusion (14), and the radial outward protrusion (14) and the inclined hole (11) are positioned on two sides of the shaft hole (12).