CN114183330B - Eccentric wheel transmission device and diaphragm air pump comprising same - Google Patents
Eccentric wheel transmission device and diaphragm air pump comprising same Download PDFInfo
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- CN114183330B CN114183330B CN202111528783.7A CN202111528783A CN114183330B CN 114183330 B CN114183330 B CN 114183330B CN 202111528783 A CN202111528783 A CN 202111528783A CN 114183330 B CN114183330 B CN 114183330B
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- eccentric wheel
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 239000010985 leather Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 10
- 239000010687 lubricating oil Substances 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 5
- 238000004663 powder metallurgy Methods 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 8
- 238000005461 lubrication Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 9
- 230000005484 gravity Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/047—Pumps having electric drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
Abstract
The invention provides an eccentric wheel transmission device and a diaphragm air pump comprising the same, comprising: the eccentric wheel comprises an eccentric wheel base body, a shaft sleeve, a balancing weight, a piston driving mechanism and an eccentric shaft, wherein the eccentric wheel base body is provided with a motor shaft hole, a balancing weight hole and an eccentric hole, the balancing weight hole is embedded into the balancing weight, the shaft sleeve is embedded into the eccentric hole, an inclined shaft hole is formed in the shaft sleeve, the piston driving mechanism comprises a connecting rod plate and a piston column, one end of the eccentric shaft is connected with the connecting rod plate, and the other end of the eccentric shaft is inserted into the eccentric shaft hole. The device rotates around the motor shaft hole, the piston column connected to the inclined shaft hole drives the eccentric shaft to swing, the diaphragm air pump comprises an air pump base, a leather cup frame, a leather cup group, an air pump lower cover and an air pump upper cover, the transmission device is installed in the air pump base, the transmission device is driven by the motor to rotate, the piston column moves up and down, and air intake and exhaust are achieved through compression and stretching of the leather cup. The invention realizes the long-service-life operation of the eccentric wheel through dynamic balance, the eccentric distance and the angle of the inclined shaft hole can be changed by replacing the shaft sleeve, the processing is convenient, and the stable self-lubrication of the transmission device is ensured.
Description
Technical Field
The invention relates to the technical field of diaphragm air pumps, in particular to an eccentric wheel transmission device and a diaphragm air pump comprising the same.
Background
In order to realize the process that the piston pushes the diaphragm cylinder to suck and exhaust, the existing diaphragm air pump basically uses an eccentric wheel mechanism and a traditional eccentric wheel structure, when in use, an output shaft of a motor is directly inserted into a motor shaft hole of the eccentric wheel to be connected without relative rotation, an eccentric shaft is inserted into an eccentric inclined hole of the eccentric wheel to be movably connected, the motor drives the eccentric wheel to rotate, and the eccentric wheel inclined hole drives the eccentric shaft to realize eccentric rotation, so that the piston crank swing is realized, and the reciprocating application of the piston is realized.
However, in the conventional eccentric wheel mechanism, the inclined hole is not perpendicular to the upper surface of the eccentric wheel, so that the processing is inconvenient, and the angle processing error of the inclined hole is large. In addition, the eccentric shaft, the piston curved rod and the resistance of the piston movement are concentrated on the eccentric hole, so that the eccentric wheel can rotate in an unbalanced manner to generate bad swing, thereby increasing the noise of the diaphragm air pump and reducing the service life of the diaphragm air pump.
In addition, for the diaphragm air pump, the angle of the inclined hole and the eccentric distance of the inclined hole of the eccentric wheel are particularly important, and are basic parameters of the swinging motion of the piston curved rod, and if the angle of the inclined hole and the eccentric distance of the inclined hole are changed, the working performance parameters such as the output flow and the output pressure of the diaphragm air pump are directly influenced. As the eccentric wheel is made of plastic and the eccentric shaft is made of stainless steel, when the diaphragm air pump works, the eccentric shaft rotates in the inclined hole to generate heat through friction, the lubricating oil generates heat and vaporization loss along with the increase of working time, and the plastic heating loss at the inclined hole of the eccentric wheel deforms, so that the inclined hole deforms to change the angle, the working performance of the diaphragm air pump is affected, and the normal working of the diaphragm air pump is further affected.
Therefore, the invention provides the eccentric wheel transmission device for the diaphragm air pump, and the eccentric wheel mechanism of the diaphragm air pump is designed in a dynamic balance manner and an inclined hole structure manner so as to ensure that the eccentric shaft and the piston crank move stably, and further ensure that the output flow, the output pressure and other working performance parameters of the diaphragm air pump are stable.
Disclosure of Invention
The invention aims to provide an eccentric wheel transmission device which can solve the problems of inconvenient processing and processing error of the eccentric wheel inclined hole in the prior art by designing an inclined shaft hole for installing an eccentric shaft and designing dynamic balance, and ensure that the eccentric shaft and a piston crank move stably.
The invention also provides a diaphragm air pump comprising the eccentric wheel transmission device, which has the advantages of low operation noise, stable working performance parameters such as output flow, output pressure and the like, longer service life, convenient processing and flexible combination.
The invention provides an eccentric wheel transmission device, comprising: the eccentric wheel base body, the motor shaft hole has been seted up at the middle part of eccentric wheel base body, the motor shaft hole is used for being connected with the output shaft cooperation of motor, eccentric hole and counter weight hole have been seted up respectively to the both sides in motor shaft hole, the embedded balancing weight that is equipped with in the counter weight hole, the axis in eccentric hole with the axis in motor shaft hole is parallel, the embedded axle sleeve that is equipped with in eccentric hole, the slope shaft hole has been seted up on the axle sleeve, the axis in slope shaft hole is relative the axis in eccentric hole is to being close to one side in motor shaft hole slope, the slope shaft hole is the blind hole, the hole bottom in slope shaft hole is mutually perpendicular with its axis, the one end of eccentric shaft stretches into in the slope shaft hole, the other end of eccentric shaft stretches into piston actuating mechanism's bottom rather than cooperation connection, the eccentric wheel base body can rotate under the motor drive, drive the eccentric shaft with piston actuating mechanism eccentric rotation realizes the inlet and exhaust of diaphragm air pump.
Preferably, the axis of the motor shaft hole is collinear with the central axis of the eccentric wheel base body, the motor shaft hole is a blind hole, the blind hole is perpendicular to the bottom surface of the eccentric wheel base body, the weight hole and the eccentric hole are blind holes, the weight hole and the eccentric hole are perpendicular to the top surface of the eccentric wheel base body, the axes of the weight hole and the eccentric hole are parallel to the axis of the motor shaft hole, and the axes of the weight hole, the eccentric hole and the motor shaft hole are located in the same plane.
Preferably, the shaft sleeve is cylindrical, and comprises at least three shaft sleeve components which are sequentially stacked along the axis direction of the eccentric hole, the shaft sleeve components are sequentially stacked to form the inclined shaft hole, and the bottom surface of the inclined shaft hole is coplanar with the top surface of the shaft sleeve component positioned at the bottommost layer in the eccentric hole.
Preferably, the shaft sleeve comprises five shaft sleeve components, namely a first shaft sleeve component, a second shaft sleeve component, a third shaft sleeve component, a fourth shaft sleeve component and a fifth shaft sleeve component which are stacked in sequence from the orifice of the eccentric hole to the bottom of the hole, wherein the outer peripheral surfaces of the shaft sleeve components are all attached to the inner wall of the eccentric hole, the top surface of the first shaft sleeve component is flush with the orifice of the eccentric hole, the bottom surface of the first shaft sleeve component is perpendicular to the axis of the inclined shaft hole, the top surfaces and the bottom surfaces of the second shaft sleeve component, the third shaft sleeve component and the fourth shaft sleeve component are perpendicular to the axis of the inclined shaft hole, the top surface of the fifth shaft sleeve component is perpendicular to the axis of the inclined shaft hole, and the bottom surface of the fifth shaft sleeve component is attached to the bottom of the eccentric hole.
Preferably, longitudinal sections of the first sleeve component and the fifth sleeve component are wedge-shaped or triangular, and longitudinal sections of the second sleeve component, the third sleeve component and the fourth sleeve component are parallelogram-shaped.
Preferably, a locating pin is arranged at the bottom of the eccentric hole, and a locating hole matched with the locating pin is arranged at the bottom of the fifth shaft sleeve assembly.
Preferably, the material used for the shaft sleeve comprises at least one of powder metallurgy porous material and foam metal material.
Preferably, the pores of the material used for the shaft sleeve are dripped or soaked with lubricating oil.
The invention also provides a diaphragm air pump comprising the eccentric wheel transmission device, which comprises an air pump base, a leather cup frame, a leather cup group, an air pump lower cover and an air pump upper cover, wherein the eccentric wheel base is arranged in the air pump base, a motor is arranged at the bottom of the air pump base, an output shaft of the motor is connected with a motor shaft hole at the bottom of the eccentric wheel base in a matched manner, the piston driving mechanism comprises a connecting rod plate and a plurality of piston columns arranged on the connecting rod plate, the leather cup frame is arranged at the top of the piston driving mechanism, the leather cup group is adaptively arranged in the leather cup frame, the air pump lower cover is arranged at the top of the leather cup frame, a plurality of groups of air holes corresponding to the positions of the leather cup group are formed in the air pump lower cover, the air pump upper cover is adaptively arranged with the air pump lower cover, and the surface of the air pump upper cover is provided with an air outlet and an air pump air inlet.
Preferably, the number of the piston columns is four, the piston columns are uniformly distributed at the top edge of the connecting rod plate, air holes are formed in the tops of the piston columns, the leather cup group comprises four leather cups, and four check valves corresponding to the positions of the leather cups are arranged on the lower cover of the air pump.
According to the technical scheme, the counterweight hole is formed in the eccentric wheel base body, the counterweight block is embedded in the eccentric wheel base body, the eccentric wheel base body can realize dynamic balance of rotation of the eccentric wheel, noise is reduced, long-service-life operation of the eccentric wheel is realized, the eccentric wheel base body is provided with the eccentric hole, the shaft sleeve is arranged in the eccentric hole, the inclined shaft hole is formed in the shaft sleeve, the eccentric shaft is arranged in the inclined shaft hole, the angle and the eccentric distance of the inclined hole can be changed by changing the counterweight block and the shaft sleeve, so that the output performance of the air pump is changed, and when the inclined shaft hole is deformed due to heating loss in the long-time use process, the shaft sleeve can be conveniently replaced, and the whole eccentric wheel does not need to be replaced. In addition, the diaphragm air pump is replaced and used with the eccentric wheel transmission device, so that the stability of working performance parameters such as output flow and output pressure of the diaphragm air pump can be ensured, the noise of the diaphragm air pump is reduced, the service life of the diaphragm air pump is prolonged, the cost is reduced, the processing is convenient, and the combination is flexible.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of the structure of the eccentric drive of the present invention;
FIG. 2 is a disassembled view of the eccentric drive of the present invention along the axial direction;
FIG. 3 is a cross-sectional view of a diaphragm air pump incorporating an eccentric drive in accordance with the present invention;
fig. 4 is a disassembled view of the diaphragm air pump including the eccentric gear mechanism according to the present invention along the axial direction.
Reference numerals illustrate:
1: an eccentric wheel base; 101: a motor shaft hole; 102: a weight port; 103: an eccentric hole; 104: positioning pin: 2: balancing weight; 3: a shaft sleeve; 301: a first sleeve; 302: a second sleeve; 303: a third sleeve; 304: a fourth sleeve; 305: a fifth sleeve; 306: an inclined shaft hole; 4: a piston driving mechanism; 401: a link plate; 402: a piston column; 5: an eccentric shaft; 6: an output shaft of the motor; 7: an air pump base; 8: a motor; 9: a leather cup; 10: a leather cup rack; 11: an air pump lower cover; 12: a one-way valve; 13: an air pump upper cover; 1301: an air outlet of the air pump; 1302: air pump air suction port.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 and 2, the present invention provides an eccentric gear transmission device, which comprises the following components: eccentric wheel base body 1, balancing weight 2, axle sleeve 3, piston actuating mechanism 4, eccentric shaft 5.
The middle part of the eccentric wheel base body 1 is provided with a motor shaft hole 101, the motor shaft hole 101 is a blind hole, the bottom surface perpendicular to the eccentric wheel base body 1 is provided with a motor shaft hole 101, the axis of the motor shaft hole 101 is collinear with the axis of the eccentric wheel base body 1, and the motor output shaft 6 is inserted into the motor shaft hole 101 and is connected without relative rotation. Weight hole 102 and eccentric hole 103 are respectively provided on two sides of motor shaft hole 101 on eccentric wheel base body 1, and weight hole 102 and eccentric hole 103 are blind holes. The balancing weight 2 is detachably embedded and installed in the balancing weight hole 102, the shaft sleeve 3 is embedded and installed in the eccentric hole 103, the shaft sleeve 3 is provided with the inclined shaft hole 306, the inclined shaft hole 306 inclines towards the side close to the balancing weight hole 102, the inclined shaft hole 306 is a blind hole, the inclined shaft hole 306 is a straight hole, the bottom surface of the hole is perpendicular to the axis of the straight hole, and the inclination angle of the inclined shaft hole 306 can be changed by changing the shaft sleeve 3, so that the output performance of the diaphragm air pump is changed. One end of the eccentric shaft 5 is detachably arranged in the inclined shaft hole 306, a positioning hole is formed in the bottom of the shaft sleeve 3, positioning is performed through a positioning pin 104 matched with the positioning hole during installation, a connecting hole is formed in the bottom of the piston driving mechanism 4, and the other end of the eccentric shaft 5 extends into the connecting hole and is connected with the connecting hole in an interference fit manner. The eccentric wheel base body can rotate under the drive of the motor output shaft 6 to drive the eccentric shaft 5 and the piston driving mechanism 4 to eccentrically rotate, so that the air inlet and exhaust of the diaphragm air pump are realized.
As a preferred embodiment of the invention, the weight hole 102 and the eccentric hole 103 are arranged perpendicular to the top surface of the eccentric wheel base body 1, the axes of the motor shaft hole 101, the weight hole 102 and the eccentric hole 103 are all positioned in the same plane, and the axes are mutually parallel, so that the gravity center of the balancing weight 2, the shaft sleeve 3 in the eccentric hole 103, the eccentric shaft 5 and the total gravity center of the piston driving mechanism 4 are positioned on the same plane passing through the axis of the motor shaft hole 101, and the dynamic balance of the adjusting device is convenient. The motor shaft hole 101 has a diameter slightly larger than that of the motor output shaft 6, is in transition fit, has the same cross-sectional shape as the motor output shaft 6, and is a cross-section of a edging shaft.
As a preferred embodiment of the present invention, as shown in fig. 1 and 2, the sleeve 3 is composed of five sleeve components, the sleeve 3 is composed of a first sleeve component 301, a second sleeve component 302, a third sleeve component 303, a fourth sleeve component 304 and a fifth sleeve component 305 which are stacked in sequence from the orifice of the eccentric hole 103 to the bottom of the hole, the five sleeve components are stacked and combined to form a cylindrical sleeve 3, an inclined shaft hole 306 is formed, the bottom of the inclined shaft hole 306 is located on the top surface of the fifth sleeve component 305, and the outer circumferential surface of each sleeve component is attached to the inner wall of the eccentric hole 103. The contact surfaces of the shaft sleeve assemblies are perpendicular to the axis of the inclined shaft hole 306, wherein the top surface of the first shaft sleeve assembly 501 is flush with the orifice of the eccentric hole 103, the bottom surface of the first shaft sleeve assembly 501 is perpendicular to the axis of the inclined shaft hole 306, the top surfaces and the bottom surfaces of the second shaft sleeve assembly 302, the third shaft sleeve assembly 303 and the fourth shaft sleeve assembly 304 are arranged in parallel and perpendicular to the axis of the inclined shaft hole 306, the top surface of the fifth shaft sleeve assembly 305 is perpendicular to the axis of the inclined shaft hole 306, and the bottom surface of the fifth shaft sleeve assembly 305 is attached to the bottom surface of the eccentric hole 103. The bottom of the fifth sleeve assembly 305 is provided with a locating hole that is positioned within the eccentric hole 103 by the locating pin 104. Longitudinal sections of the first sleeve member 301 and the fifth sleeve member 305 are wedge-shaped or triangular, and longitudinal sections of the second sleeve member 302, the third sleeve member 303 and the fourth sleeve member 304 are parallelogram-shaped. At least one surface of each shaft sleeve component is perpendicular to the axis of the inclined shaft hole 306, the inclined shaft hole 306 can be processed vertically by adopting a cutter, the processing precision of the inclined shaft hole 306 can be ensured, the parameters of the inclination angle and the eccentricity of the inclined shaft hole 306 can be ensured, and the angle and the eccentricity of the inclined shaft hole 306 can be changed by changing the balancing weight 2 and the shaft sleeve components, so that the output performance of the diaphragm air pump can be changed. In addition, the gap can be increased by dividing the shaft sleeve 3 into a plurality of parts, so that heat dissipation is accelerated.
In this embodiment, the material of the sleeve 3 is made of a mixture of a powder metallurgy material and a foam metal material, or may be a powder metallurgy material or a foam metal material, which is formed by sintering, and has many pores and good air permeability, so as to obtain a material with pores between the powder metallurgy material and the foam metal material, and the characteristics of both high strength and low density are both considered. The pores can store lubricating oil in an oil immersion or oil drop mode and accelerate heat dissipation, so that the self-lubricating requirement is met. The strength of the material can support the eccentric shaft 5 to rotate, so that the thermal deformation of the inclined shaft hole 306 caused by the rotation of the eccentric shaft is effectively improved, and the angle of the inclined shaft hole 306 is kept. The material has low density and can reduce unbalance of rotation.
As a preferred embodiment of the present invention, lubrication between the shaft housing 3 and the eccentric shaft 5 is performed by heating and immersing the cleaned sintered first shaft housing assembly 301, second shaft housing assembly 302, third shaft housing assembly 303, fourth shaft housing assembly 304 and fifth shaft housing assembly 305 in hot oil at 80 ℃ to 120 ℃ for one hour, and as the parts are heated, air in the communicating pores expands, so that a part of air is removed, and after cooling, the rest of air contracts again, and the oil is sucked into the pores. When the eccentric shaft 5 rotates in the shaft sleeve 3, the shaft sleeve 3 is heated by friction, and the air in the hole expands to spill lubricating oil out of the eccentric shaft 5 to lubricate the eccentric shaft 5, so that the self-lubricating effect is achieved, and when the rotating speed is high, the dynamic pressure lubrication phenomenon occurs.
As a preferred embodiment of the invention, the weight 2 is made of metal material, such as 304 stainless steel, and is shaped as a cylinder, and the weight 2 is designed to balance the acting force of the motion resistance of the eccentric shaft 5 and the piston driving structure 4 on the eccentric wheel base body 1. The weight block 2 is detachably embedded in the weight hole 102 of the eccentric wheel base body 1, the gravity center of the weight block and the total gravity center of the motion resistance of the shaft sleeve 3, the eccentric shaft 5 and the piston driving mechanism 4 on the eccentric hole 103 are on the same diameter of a circle coaxial with the motor shaft hole 101, so that the gravity center of the device is kept on the axis of the motor shaft hole 101 as much as possible, the dynamic balance is achieved during the operation, and the service life of the device is prolonged. Specifically, according to the principle of dynamic balance of mechanics, to achieve dynamic balance, the moment of inertia Σi=0 needs to be achieved,
i.e. m 1 r 1 2 ＝m 0 r 0 2 +m 2 r 2 2 ，
Wherein m is 1 、m 0 、m 2 The weight of the balancing weight 2, the weight of the eccentric wheel matrix 1, the downward acting force of the motion resistance borne by the shaft sleeve 3, the eccentric shaft 5 and the piston driving mechanism 4, r 1 、r 0 、r 2 The distance from the axis of the weight hole 102 to the axis of the motor shaft hole 101 is respectively the distance from the center of gravity of the eccentric wheel base body 1 to the axis of the motor shaft hole 101, and the distance from the center of the inclined shaft hole 306 to the axis of the motor shaft hole 101.
As shown in fig. 2, 3 and 4, the invention also provides a diaphragm air pump comprising the eccentric wheel transmission device, which comprises an air pump base 7, a leather cup frame 10, a leather cup group 9, an air pump lower cover 11 and an air pump upper cover 13, wherein the eccentric wheel base 1 is arranged in the air pump base 7, an opening is arranged at the bottom of the air pump base 7, a motor 8 is arranged at the top of the air pump base 7, a motor output shaft 6 penetrates through the opening to be connected with a motor shaft hole 101 at the bottom of the eccentric wheel base 1 in a matched manner, the piston driving mechanism 4 comprises a connecting rod plate 401 and four piston columns 402 arranged on the connecting rod plate, a central hole is arranged at the bottom of the connecting rod plate 401 and connected with an eccentric shaft 5 in an interference fit manner, the piston columns 402 are uniformly distributed at the top edge of the connecting rod plate 401 in a ring shape, air holes are arranged at the top of the piston columns 402, the leather cup frame 10 is arranged at the top of the piston columns 402, the cup group 9 is adaptively installed in the cup holder 10, the cup group 9 comprises four integrally connected cups, the air pump lower cover 11 is installed at the top of the cup holder 10, four groups of air holes corresponding to the positions of the cup group 9 are formed in the air pump lower cover 11, four check valves 12 corresponding to the positions of the cups are further arranged on the air pump lower cover 11 and the air pump lower cover 13 in an adapting mode through the air pump upper cover 11 and the air pump lower cover 13, the four piston columns 402 drive the piston driving mechanism 4 to swing along with the rotation process of the eccentric wheel base body 1 and the eccentric shaft 5, the piston columns 402 move up and down, the reciprocating motion of the pistons is equivalent, air inlet and outlet gases of the cup 9 are pushed into the space in the air pump lower cover 11 and the air pump upper cover 13 in a unidirectional mode through the piston columns 402, and the air inlet and outlet 1302 of the air pump are formed in the surface of the air pump upper cover 13.
The working principle of the diaphragm air pump of the invention is as follows: the eccentric wheel base body 1 rotates by taking the axis of the motor shaft hole 101 as the shaft, the inclined shaft hole 306 formed by the shaft sleeve 3 in the eccentric hole 103 of the eccentric wheel base body 1 drives the piston driving mechanism 4 connected with the eccentric shaft 5 to swing, and the piston column 402 moves up and down, which is equivalent to realizing the reciprocating motion of the piston and pushing the leather cup 9 to enter and exhaust. The balancing weight 2 is embedded into the balancing weight hole 102 and rotates along with the eccentric wheel base body 1, so that acting force of the eccentric shaft 5, the connecting rod plate 401 and the piston column 402 on the eccentric wheel base body 1 is balanced, and dynamic balance of the eccentric wheel transmission device is maintained. The eccentric shaft 5 rotates in the shaft sleeve 3, so that lubricating oil stored in the pores of the material of the shaft sleeve 3 overflows to lubricate the eccentric shaft 5, and overheating caused by friction in the transmission process is prevented.
The motor 8 drives the eccentric wheel base body 1 to rotate, the balancing weight 2 is embedded into the balancing weight hole 102 to rotate along with the eccentric wheel base body 1, dynamic balance of the eccentric wheel transmission device is maintained, the shaft sleeve 3 in the eccentric hole 103 of the eccentric wheel base body 1 forms an inclined shaft hole 306, the eccentric shaft 5 is driven to eccentrically rotate, the connecting rod plate 401 is connected to perform swinging motion, the piston column 402 is connected with the leather cup group 9 arranged on the leather cup frame 10, and the piston column 402 moves up and down and is equivalent to reciprocating motion of a piston. When the piston column 402 moves towards the motor 8, one cavity of the cup set 9 is stretched, at this time, in the air suction stage of the piston column 402, the one-way valve 12 is closed, the valve plate on the cup set 9 is opened, and air is sucked from the air pump air suction port 1302, is sucked into the cavity of the cup set 9 through the upper cover 13, the lower cover 11 and the air pump base 7. When one of the piston posts 402 moves toward the air pump air outlet 1301, one cavity of the cup set 9 is compressed, and at this time, the check valve 12 is opened and the valve plate on the cup set 9 is closed during the air suction stage of the piston post 402, so that air is pressed out from the air pump lower cover 11, passes through the air pump upper cover 13, and is sprayed out from the air pump air outlet 1301.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. An eccentric wheel transmission device, comprising: the eccentric wheel base body, the middle part of eccentric wheel base body has seted up the motor shaft hole, the axis in motor shaft hole with the axis collineation of eccentric wheel base body, the motor shaft hole is the blind hole, its perpendicular to the bottom surface of eccentric wheel base body is seted up, the motor shaft hole is used for being connected with the output shaft cooperation of motor, eccentric hole and counter weight hole have been seted up respectively to the both sides in motor shaft hole, the counter weight hole with the eccentric hole is the blind hole, counter weight hole with the eccentric hole perpendicular to the top surface of eccentric wheel base body is seted up, the axis of counter weight hole with the axis of eccentric hole all parallels with the axis in motor shaft hole, and the axis in counter weight hole with the axis in motor shaft hole is located the coplanar, the embedded balancing weight that is equipped with in counter weight hole, the axis in counter weight hole parallels with the axis in motor shaft hole, the eccentric hole is embedded with a shaft sleeve, the shaft sleeve is provided with an inclined shaft hole, the shaft sleeve is cylindrical and comprises at least three shaft sleeve components which are sequentially stacked along the axis direction of the eccentric hole, each shaft sleeve component is sequentially stacked to form the inclined shaft hole, the bottom surface of the inclined shaft hole is coplanar with the top surface of the shaft sleeve component positioned at the bottommost layer in the eccentric hole, the axis of the inclined shaft hole is inclined towards one side close to the motor shaft hole relative to the axis of the eccentric hole, the inclined shaft hole is a blind hole, the bottom surface of the inclined shaft hole is perpendicular to the axis of the inclined shaft hole, one end of an eccentric shaft extends into the inclined shaft hole, the other end of the eccentric shaft extends into the bottom of a piston driving mechanism to be connected with the bottom of the piston driving mechanism in a matched manner, an eccentric wheel matrix can be driven by a motor to rotate, and the eccentric shaft and the piston driving mechanism are driven to eccentrically rotate, the air inlet and the air outlet of the diaphragm air pump are realized.
2. The eccentric wheel transmission device according to claim 1, wherein the shaft sleeve comprises five shaft sleeve components, namely a first shaft sleeve component, a second shaft sleeve component, a third shaft sleeve component, a fourth shaft sleeve component and a fifth shaft sleeve component which are stacked in sequence from the orifice of the eccentric hole to the bottom of the hole, the peripheral surface of each shaft sleeve component is attached to the inner wall of the eccentric hole, the top surface of the first shaft sleeve component is flush with the orifice of the eccentric hole, the bottom surface of the first shaft sleeve component is perpendicular to the axis of the inclined shaft hole, the top surfaces and the bottom surfaces of the second shaft sleeve component, the third shaft sleeve component and the fourth shaft sleeve component are perpendicular to the axis of the inclined shaft hole, and the top surface of the fifth shaft sleeve component is attached to the bottom of the eccentric hole.
3. The eccentric transmission as in claim 2, wherein the longitudinal sections of the first sleeve assembly and the fifth sleeve assembly are wedge-shaped or triangular, and the longitudinal sections of the second sleeve assembly, the third sleeve assembly, and the fourth sleeve assembly are parallelogram-shaped.
4. The eccentric wheel transmission according to claim 2, wherein a locating pin is arranged at the bottom of the eccentric hole, and a locating hole matched with the locating pin is arranged at the bottom of the fifth shaft sleeve assembly.
5. The eccentric transmission of claim 1, wherein the sleeve comprises at least one of a powder metallurgy porous material and a foam metal material.
6. The eccentric transmission as in claim 5, wherein said sleeve comprises a material having pores that are either impregnated or dripped with lubricating oil.
7. A diaphragm air pump comprising the eccentric wheel transmission device of any one of claims 1-6, comprising an air pump base, a cup holder, a cup group, an air pump lower cover and an air pump upper cover, wherein the eccentric wheel base is arranged in the air pump base, a motor is arranged at the bottom of the air pump base, an output shaft of the motor is connected with a motor shaft hole at the bottom of the eccentric wheel base in a matched manner, the piston driving mechanism comprises a connecting rod plate and a plurality of piston columns arranged on the connecting rod plate, the cup holder is arranged at the top of the piston driving mechanism, the cup group is adaptively arranged in the cup holder, the air pump lower cover is arranged at the top of the cup holder, a plurality of groups of air holes corresponding to the cup group are formed in the air pump lower cover, the air pump upper cover is adaptively arranged with the air pump lower cover, and an air outlet and an air pumping port are formed in the surface of the air pump upper cover.
8. The diaphragm air pump of claim 7, wherein the number of the piston columns is four, the piston columns are uniformly distributed at the top edge of the connecting rod plate, air holes are formed in the tops of the piston columns, the leather cup group comprises four leather cups, and four check valves corresponding to the positions of the leather cups are arranged on the lower cover of the air pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111528783.7A CN114183330B (en) | 2021-12-14 | 2021-12-14 | Eccentric wheel transmission device and diaphragm air pump comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111528783.7A CN114183330B (en) | 2021-12-14 | 2021-12-14 | Eccentric wheel transmission device and diaphragm air pump comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114183330A CN114183330A (en) | 2022-03-15 |
| CN114183330B true CN114183330B (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111528783.7A Active CN114183330B (en) | 2021-12-14 | 2021-12-14 | Eccentric wheel transmission device and diaphragm air pump comprising same |
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| Country | Link |
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| CN (1) | CN114183330B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2723733Y (en) * | 2004-08-16 | 2005-09-07 | 张坤林 | Two purpose pump for air extracting and pressurizing |
| JP2014196679A (en) * | 2013-03-29 | 2014-10-16 | 応研精工株式会社 | Diaphragm pump |
| CN206816477U (en) * | 2017-05-05 | 2017-12-29 | 台科投资有限公司 | Membrane pump |
| CN212360137U (en) * | 2020-06-08 | 2021-01-15 | 厦门坤锦电子科技有限公司 | Eccentric wheel with counterweight structure |
| CN213016722U (en) * | 2020-04-08 | 2021-04-20 | 深圳市博威克斯科技有限公司 | Anti-drip diaphragm pump stable in operation |
-
2021
- 2021-12-14 CN CN202111528783.7A patent/CN114183330B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2723733Y (en) * | 2004-08-16 | 2005-09-07 | 张坤林 | Two purpose pump for air extracting and pressurizing |
| JP2014196679A (en) * | 2013-03-29 | 2014-10-16 | 応研精工株式会社 | Diaphragm pump |
| CN206816477U (en) * | 2017-05-05 | 2017-12-29 | 台科投资有限公司 | Membrane pump |
| CN213016722U (en) * | 2020-04-08 | 2021-04-20 | 深圳市博威克斯科技有限公司 | Anti-drip diaphragm pump stable in operation |
| CN212360137U (en) * | 2020-06-08 | 2021-01-15 | 厦门坤锦电子科技有限公司 | Eccentric wheel with counterweight structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114183330A (en) | 2022-03-15 |
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