Energy-saving vacuum pump

Abstract

The utility model discloses an energy-saving vacuum pump, which is used for extracting a certain volume of gas in a vacuum object system and at least comprises a driving motor, an eccentric wheel, a wobble plate, a diaphragm air bag sheet, a wobble plate transmission shaft and a diaphragm bracket. According to the wobble plate transmission shaft, the wobble plate transmission shaft can rotate smoothly, the wobble plate transmission shaft rotates more smoothly at a high speed, current consumed due to friction is reduced, and the energy-saving effect is achieved. And moreover, the abrasion phenomenon caused by long-term high-speed rotation of the balls is effectively reduced, meanwhile, the transmission resistance is reduced through the bearing design, the current loss is reduced, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of vacuum pumps, in particular to an energy-saving vacuum pump. Background Art

[0002] A vacuum pump is a device that creates a vacuum inside a container by evacuating the inside of the container. A diaphragm vacuum pump is a type of vacuum pump, and its basic working principle is as follows: the motor outputs rotational motion as a driving device, driving the eccentric wheel inside the pump to make eccentric motion, thereby driving the internal diaphragm airbag to make reciprocating motion; as the diaphragm airbag moves, the volume of its pump chamber expands or shrinks, thereby compressing or stretching the air in the pump chamber, and generating a pressure difference between the air inlet of the pump and the external atmospheric pressure. Under the action of the pressure difference, the gas is sucked into the pump chamber (the pump chamber expands, a slight negative pressure is formed in the pump chamber, at this time the air inlet is opened, the exhaust port is closed, and the gas is sucked into the pump), and then the gas is discharged from the exhaust port (the pump chamber shrinks, a slight positive pressure is formed in the pump chamber, at this time the air inlet is closed, the exhaust port is opened, and the gas is discharged out of the pump), realizing a continuous pumping-exhausting cycle, thereby gradually reducing the pressure in the vacuum object system.

[0003] Vacuum diaphragm pumps involve many transmission parts and a series of motion transmission processes. Vacuum diaphragm pumps are often used in small portable products, such as breast pumps and nasal aspirators, to extract a certain amount of air from the inside of the container. Especially in such small portable products, the energy consumption of the vacuum pump is an important performance, which will affect the service life of the product. The existing vacuum diaphragm pumps are limited by their structure, and their energy consumption is still relatively high, and energy saving can be further improved. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an energy-saving vacuum pump, which can solve the problem of high energy consumption of the existing vacuum diaphragm pump.

[0005] The utility model is realized by the following technical solutions:

[0006] An energy-saving vacuum pump comprises: a driving motor; an eccentric wheel fixed on the motor shaft of the driving motor; a wobble plate, on which a plurality of diaphragm airbag sheets are fixed in the circumferential direction; a wobble plate transmission shaft, the two ends of the wobble plate transmission shaft are respectively connected to the eccentric wheel and the wobble plate; a first ball bearing and a first ball are arranged inside the eccentric wheel; the wobble plate transmission shaft is passed through the first ball bearing, and its bottom end abuts against the first ball; a diaphragm bracket, the upper part of the diaphragm airbag sheet is fixed to the diaphragm bracket; a second ball is arranged on the top of the wobble plate; a second ball bearing is installed in the diaphragm bracket, a rotation limit column is passed through the second ball bearing, the bottom end of the rotation limit column is provided with an arc groove matching the surface of the second ball, and the bottom end of the rotation limit column abuts against the second ball.

[0007] Furthermore, the bottom of the wobble plate is in close contact with the top of the first ball bearing to achieve axial limitation of the rotation limiting column.

[0008] Furthermore, a receiving groove for accommodating a second ball is provided on the top of the wobble plate, and the second ball is rotatably installed in the receiving groove.

[0009] Furthermore, the energy-saving vacuum pump also includes a main body shell, and the drive motor is fixed to the main body shell so that the motor shaft extends into the inner cavity of the main body shell.

[0010] Furthermore, the energy-saving vacuum pump also includes: a special-shaped sealing sleeve for sealing the main shell and the drive motor; the special-shaped sealing sleeve includes a cylindrical boss and a fastening ring integrally formed on both sides of the cylindrical boss; a through hole is provided on the cylindrical boss for the motor shaft of the drive motor to pass through; a sleeve mounting groove matching the special-shaped sealing sleeve is provided at the bottom of the main shell, and the special-shaped sealing sleeve is tightly clamped into the sleeve mounting groove; a fastening hole is also provided in the sleeve mounting groove, and the fastening ring of the special-shaped sealing sleeve is clamped to the outer periphery of the fastening hole; the drive motor, the special-shaped sealing sleeve and the main shell are connected by fasteners, and lubricating grease is applied at the connection position between the motor shaft of the drive motor and the eccentric wheel.

[0011] Furthermore, a plurality of protrusion structures for snapping are circumferentially extended on the outer side wall of the cylindrical boss of the special-shaped sealing sleeve; a plurality of snap-fit ​​structures are provided on the inner side wall of the sleeve mounting groove, and the protrusion structures are snapped into the gaps between adjacent snap-fit ​​structures to fasten the special-shaped sealing sleeve to the main shell.

[0012] Furthermore, the energy-saving vacuum pump also includes: an air outlet surface cover; the air outlet surface cover is fixed to the other end of the main shell relative to the drive motor; the air outlet surface cover is provided with an air outlet, and the air outlet is connected to the inner cavity of the main shell; the main shell is provided with an air inlet, and the air inlet is connected to the inner cavity of the main shell.

[0013] Furthermore, the energy-saving vacuum pump also includes: a valve plate bracket and an air outlet valve plate; the valve plate bracket is fixed in the air outlet surface cover, the diaphragm airbag plate is placed at the bottom of the valve plate bracket, and the valve plate bracket is also provided with an air hole that is simultaneously connected to the air outlet and the diaphragm airbag plate; the air outlet valve plate is plugged into the valve plate bracket, and the air outlet valve plate is simultaneously covered on the air hole, so that when the air outlet valve plate is pushed out by positive pressure, the gas in the diaphragm airbag plate passes through the air hole and is output to the air outlet.

[0014] Furthermore, the air outlet valve sheet is an umbrella-shaped structure, which includes an umbrella handle structure for plugging on the valve sheet bracket and an umbrella cover structure for covering the air hole; the air outlet valve sheet is a flexible sheet.

[0015] Furthermore, the energy-saving vacuum pump also includes: a shock-absorbing rubber pad; the shock-absorbing rubber pad is tightly arranged between the driving motor and the main body shell.

[0016] Compared with the prior art, the utility model can achieve the following effects:

[0017] During operation, the driving motor drives the eccentric wheel to rotate eccentrically, and drives the pendulum plate to reciprocate in a horizontal direction orthogonal to the axis of the eccentric wheel. Since the upper and lower parts of the diaphragm airbag are respectively fixed to the diaphragm bracket and the pendulum plate, the internal pump cavity of the diaphragm airbag plate will expand or shrink when driven by the pendulum plate, thereby compressing or stretching the air in the pump cavity of the diaphragm airbag plate, causing the positive and negative pressure differences between the internal and external atmospheric pressures to alternately generate a pumping-exhausting cycle, thereby continuously performing a vacuum pumping-exhausting cycle, and then gradually reducing the pressure in the vacuum object system.

[0018] The utility model has a first ball bearing and a first ball disposed inside the eccentric wheel, and the swing plate transmission shaft is inserted into the first ball bearing. The swing plate transmission shaft is in a rolling friction form in radial and axial directions, which ensures that the swing plate transmission shaft can rotate smoothly and is smoother when rotating at high speed, thereby reducing the current lost due to friction and achieving energy saving effect.

[0019] In addition, a second ball is installed at the top of the wobble plate, a second ball bearing is installed in the diaphragm bracket, and a rotation limit column is installed in the second ball bearing to abut against the second ball, so as to limit the wobble plate and make the wobble plate move more smoothly. At the same time, the end surface of the rotation limit column matches the surface of the second ball through the arc groove, which plays a role of rotation limit, effectively reducing the wear phenomenon caused by the long-term high-speed rotation of the second ball. At the same time, the second ball bearing reduces the transmission resistance, reduces the current loss, and plays an energy-saving role. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a schematic diagram of the appearance of the utility model;

[0021] Figure 2 Shown is an exploded schematic diagram of the utility model;

[0022] Figure 3 Shown is a cross-sectional view of the utility model;

[0023] Figure 4 Another cross-sectional view of the present invention is shown;

[0024] Figure 5 The figure shows the structural schematic diagram of the special-shaped sealing sleeve;

[0025] Figure 6 The diagram shows the matching of the main housing and the special-shaped sealing sleeve.

[0026] In the figure: 10, driving motor; 20, eccentric wheel; 30, swing plate; 40, diaphragm airbag plate; 50, swing plate transmission shaft; 60, diaphragm bracket; 70, first ball bearing; 80, first ball; 90, second ball; 100, second ball bearing; 110, rotation limit column; 120, main body shell; 121, air inlet; 122, sleeve mounting groove; 1221, snap structure; 1222, fastening hole; 130, air outlet cover; 131, air outlet; 140, special-shaped sealing sleeve; 141, cylindrical boss; 1411, raised structure; 142, fastening ring; 150, valve plate bracket; 151, air vent; 160, air outlet valve plate; 170, shock-absorbing rubber pad. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] See also Figure 1-Figure 4 The utility model discloses an energy-saving vacuum pump for extracting a certain volume of gas from a vacuum object system, which at least includes: a drive motor 10, an eccentric wheel 20, a swing plate 30, a diaphragm airbag sheet 40, a swing plate transmission shaft 50 and a diaphragm bracket 60.

[0032] The driving motor 10 outputs rotational motion as a power device, and the motor shaft of the driving motor 10 is connected to the eccentric wheel 20. A plurality of diaphragm airbag sheets 40 are fixed on the wobble plate 30 along the circumference, and the diaphragm airbag sheets 40 have a pump cavity inside, and the diaphragm airbag sheets 40 can be squeezed or expanded. The two ends of the wobble plate transmission shaft 50 are respectively connected to the wobble plate 30 of the eccentric wheel 20. When the eccentric wheel 20 rotates eccentrically, the wobble plate transmission shaft 50 drives the wobble plate 30 to reciprocate in a horizontal direction orthogonal to the axis of the eccentric wheel 20. A first ball bearing 70 and a first ball 80 are installed inside the eccentric wheel 20, and the first ball 80 is located in the bottom direction of the first ball bearing 70; the wobble plate transmission shaft 50 is passed through the first ball bearing 70, and its bottom abuts against the first ball 80. The upper part of the diaphragm airbag sheet 40 is also fixed to the diaphragm bracket 60, so that when the swing plate 30 makes a reciprocating motion, it will pull the pump cavity of the diaphragm airbag sheet 40 to expand or shrink. A second ball 90 is also provided on the top of the swing plate 30, and a second ball bearing 100 is installed in the diaphragm bracket 60. A rotation limit column 110 is inserted in the second ball bearing 100. The bottom end of the rotation limit column 110 is provided with an arc groove matching the surface of the second ball 90, and the arc groove cooperates with the second ball 90.

[0033] Of course, in order to realize the most basic air intake and exhaust functions of the pump body, so that the gas of the vacuum object system can enter the pump body and be discharged from the pump body to the outside atmosphere, the utility model also includes a main shell 120 and an air outlet cover 130. The drive motor 10 is fixed on the main shell 120, and the motor shaft of the drive motor 10 extends into the inner cavity of the main shell 120 and is connected to the eccentric wheel 20. The air outlet cover 130 is fixed to the other end of the main shell 120 relative to the drive motor 10; the air outlet cover 130 is provided with an air outlet 131, and the air outlet 131 is connected to the inner cavity of the main shell 120; the main shell 120 is provided with an air inlet 121, and the air inlet 121 is connected to the inner cavity of the main shell 120.

[0034] During operation, the driving motor 10 drives the eccentric wheel 20 to rotate eccentrically, and the swing plate transmission shaft 50 drives the swing plate 30 to reciprocate in a horizontal direction orthogonal to the axis of the eccentric wheel 20. Since the upper and lower parts of the diaphragm airbag sheet 40 are respectively fixed to the diaphragm bracket 60 and the swing plate 30, the internal pump cavity of the diaphragm airbag sheet 40 will expand or shrink when driven by the swing plate 30, thereby compressing or stretching the air in the pump cavity of the diaphragm airbag sheet 40, thereby continuously performing a cycle of pumping-exhausting, and then gradually reducing the pressure in the vacuum object system. Specifically, as the diaphragm airbag sheet 40 moves, when the volume of the pump cavity expands, a slight negative pressure is formed in the pump cavity, at which time the air inlet 121 is opened and the air outlet 131 is closed, and the gas is sucked into the pump; when the pump cavity shrinks, the pump cavity shrinks, and a slight positive pressure is formed in the pump cavity, at which time the air inlet 121 is closed and the air outlet 131 is opened, and the gas is discharged out of the pump; this cycle is continuous, thereby realizing a working cycle of pumping-exhausting.

[0035] In the utility model, a first ball bearing 70 and a first ball 80 are arranged inside the eccentric wheel 20, and the swing plate transmission shaft 50 is inserted into the first ball bearing 70. The swing plate transmission shaft 50 is in a rolling friction form in the radial direction and the axial direction, which ensures that the swing plate transmission shaft 50 can rotate smoothly. At the same time, it is smoother when rotating at high speed, reducing the current caused by friction loss, and achieving energy saving effect.

[0036] In addition, a second ball 90 is installed at the top of the wobble plate 30, a second ball bearing 100 is installed in the diaphragm bracket 60, and a rotation limiting column 110 is installed in the second ball bearing 100 to abut against the second ball 90, so as to limit the wobble plate 30 and make the wobble plate 30 move more smoothly. At the same time, the end surface of the rotation limiting column 110 matches the surface of the second ball 90 through the arc groove, which plays a role of rotation limiting, effectively reducing the wear phenomenon caused by the long-term high-speed rotation of the second ball 90, and at the same time, the second ball bearing 100 reduces the transmission resistance, reduces the current consumption, and plays an energy-saving role.

[0037] Preferably, a receiving groove for accommodating the second ball 90 is further provided on the top of the wobble plate 30, and the second ball 90 is rotatably installed in the receiving groove, so that the lower part of the second ball 90 and the wobble plate 30 also cooperate through the arc surface to reduce the wear caused by friction.

[0038] To further improve the energy saving effect of energy-saving vacuum pumps, refer to Figure 5-Figure 6The utility model further includes a special-shaped sealing sleeve 140 for sealing the main housing 120 and the drive motor 10. The special-shaped sealing sleeve 140 includes a cylindrical boss 141 and a fastening ring 142 integrally formed with both sides of the cylindrical boss 141; of course, a through hole is also provided on the cylindrical boss 141 for the motor shaft of the drive motor 10 to pass through. Accordingly, a sleeve installation groove 122 matching the special-shaped sealing sleeve 140 is provided at the bottom of the main housing 120 for embedded installation of the special-shaped sealing sleeve 140, and the special-shaped sealing sleeve 140 is tightly clamped into the sleeve installation groove 122. A fastening hole 1222 is also provided in the sleeve installation groove 122. The fastening clamping ring of the special-shaped sealing sleeve 140 is connected to the outer periphery of the fastening hole 1222. During installation, one end of the fastening bolt is connected to the drive motor 10, and the other end passes through the fastening hole 1222, so that the drive motor 10, the special-shaped sealing sleeve 140 and the main housing 120 are fastened and connected. In addition, lubricating grease is also applied to the connection position of the motor shaft of the drive motor 10 and the eccentric wheel 20. By arranging the special-shaped sealing sleeve 140 between the drive motor 10 and the eccentric wheel 20 and applying lubricating grease to the connection, the leakage of the internal vacuum from the gap between the motor shaft and the motor bearing is effectively solved. While ensuring the sealing performance, the increase of the current caused by the friction when the special-shaped sealing sleeve 140 and the motor shaft rotate will not be increased.

[0039] Further, in order to make the connection between the special-shaped sealing sleeve 140 and the main housing 120 more stable, refer to Figure 5-Figure 6 A plurality of protrusion structures 1411 for buckling are circumferentially extended on the outer wall of the cylindrical boss 141 of the special-shaped sealing sleeve 140. Correspondingly, a plurality of snap-fit ​​structures 1221 are provided on the inner wall of the sleeve mounting groove 122. The gap between adjacent snap-fit ​​structures 1221 matches the protrusion structure 1411, so that the protrusion structure 1411 can be snapped into the gap, thereby making the special-shaped sealing sleeve 140 firmly mounted on the main housing 120.

[0040] Preferably, the energy-saving vacuum pump further comprises a valve plate support 150 and an air outlet valve plate 160. The valve plate support 150 is fixed in the air outlet cover 130, and the diaphragm airbag plate 40 is located at the bottom of the valve plate support 150. Specifically, the valve plate support 150 covers the top opening of the pump chamber of the diaphragm airbag plate 40. The valve plate support 150 is also provided with an air vent 151, and both ends of the air vent 151 are connected to the pump body air outlet 131 and the pump chamber of the diaphragm airbag plate 40. The air outlet valve plate 160 is plugged on the valve plate support 150, and the air outlet valve plate 160 covers the air vent 151. In this way, when the air outlet valve plate 160 is pushed out by the positive pressure in the pump chamber, the gas in the pump chamber of the diaphragm airbag plate 40 can pass through the air vent 151 and be discharged from the air outlet 131 to the pump body.

[0041] Furthermore, the specific structure of the air outlet valve plate 160 is an umbrella-shaped structure, which includes an umbrella handle structure for plugging on the valve plate bracket 150 and an umbrella cover structure for covering the air hole 151. The air outlet valve plate 160 is a flexible plate. In this way, when positive pressure is formed in the pump chamber, the umbrella handle structure of the air outlet valve plate 160 will be lifted up, so that the umbrella cover structure no longer covers the air hole 151, so that the air in the pump chamber can pass through the air hole 151 and be discharged through the air outlet 131.

[0042] Preferably, in order to reduce the impact of vibration generated by the drive motor 10 during operation on the pump body, the utility model further includes a shock-absorbing rubber pad 170 , which is tightly arranged between the drive motor 10 and the main housing 120 .

[0043] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An energy-saving vacuum pump, characterized in that: include: Drive motor; An eccentric wheel is fixed on the motor shaft of the driving motor; A wobble plate, on which a plurality of diaphragm airbag sheets are fixed in a circumferential direction; A wobble plate transmission shaft, wherein two ends of the wobble plate transmission shaft are respectively connected to the eccentric wheel and the wobble plate; a first ball bearing and a first ball are disposed inside the eccentric wheel; the wobble plate transmission shaft is passed through the first ball bearing, and a bottom end thereof abuts against the first ball; a diaphragm support, to which the upper portion of the diaphragm airbag sheet is fixed; A second ball is placed on the top of the wobble plate; a second ball bearing is installed in the diaphragm bracket, a rotation limit column is passed through the second ball bearing, and an arc-shaped groove matching the surface of the second ball is formed at the bottom end of the rotation limit column, and the bottom end of the rotation limit column abuts against the second ball.

2. The energy-saving vacuum pump according to claim 1, characterized in that: The bottom of the wobble plate is in close contact with the top of the first ball bearing to achieve axial limitation of the rotation limiting column.

3. The energy-saving vacuum pump according to claim 1, characterized in that: A receiving groove for accommodating a second ball is provided on the top of the wobble plate, and the second ball is rotatably installed in the receiving groove.

4. The energy-saving vacuum pump according to claim 1, characterized in that: The energy-saving vacuum pump further comprises a main body shell, and the driving motor is fixed to the main body shell so that the motor shaft extends into the inner cavity of the main body shell.

5. The energy-saving vacuum pump according to claim 4, characterized in that: The energy-saving vacuum pump further comprises: a special-shaped sealing sleeve for sealing the main housing and the driving motor; The special-shaped sealing sleeve includes a cylindrical boss and fastening rings integrally formed on both sides of the cylindrical boss; a through hole is formed on the cylindrical boss for the motor shaft of the drive motor to pass through; The bottom of the main body shell is provided with a sleeve installation groove matching the special-shaped sealing sleeve, and the special-shaped sealing sleeve is tightly clamped into the sleeve installation groove; a fastening hole is also opened in the sleeve installation groove, and the fastening ring of the special-shaped sealing sleeve is clamped to the outer periphery of the fastening hole; The driving motor, the special-shaped sealing sleeve and the main body shell are connected via fasteners, and lubricating grease is applied to the connection position between the motor shaft of the driving motor and the eccentric wheel.

6. The energy-saving vacuum pump according to claim 5, characterized in that: A plurality of protruding structures for buckling are circumferentially extended on the outer side wall of the cylindrical boss of the special-shaped sealing sleeve; a plurality of snap-fit ​​structures are provided on the inner side wall of the sleeve mounting groove, and the protruding structures are snapped into the gaps between the adjacent snap-fit ​​structures so that the special-shaped sealing sleeve is fastened to the main body shell.

7. The energy-saving vacuum pump according to claim 4, characterized in that: The energy-saving vacuum pump also includes: an air outlet surface cover; the air outlet surface cover is fixed to the other end of the main shell relative to the drive motor; the air outlet surface cover is provided with an air outlet, and the air outlet is connected to the inner cavity of the main shell; the main shell is provided with an air inlet, and the air inlet is connected to the inner cavity of the main shell.

8. The energy-saving vacuum pump according to claim 7, characterized in that: The energy-saving vacuum pump further comprises: a valve plate support and an air outlet valve plate; The valve plate bracket is fixed in the air outlet surface cover, the diaphragm airbag plate is placed at the bottom of the valve plate bracket, and the valve plate bracket is also provided with an air hole that is connected to the air outlet and the diaphragm airbag plate at the same time; the air outlet valve plate is plugged on the valve plate bracket, and the air outlet valve plate is simultaneously covered on the air hole, so that when the air outlet valve plate is pushed out by positive pressure, the gas in the diaphragm airbag plate passes through the air hole and is output to the air outlet.

9. The energy-saving vacuum pump according to claim 8, characterized in that: The air outlet valve sheet is an umbrella-shaped structure, which includes an umbrella handle structure for plugging on the valve sheet bracket and an umbrella cover structure for covering the air hole; the air outlet valve sheet is a flexible sheet.

10. The energy-saving vacuum pump according to claim 4, characterized in that: The energy-saving vacuum pump further comprises: a shock-absorbing rubber pad; the shock-absorbing rubber pad is tightly arranged between the driving motor and the main body shell.

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