CN219529300U

CN219529300U - Air pump capable of switching air inlet and air outlet in forward and reverse directions

Info

Publication number: CN219529300U
Application number: CN202320386936.7U
Authority: CN
Inventors: 沈华燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-08-15
Anticipated expiration: 2033-02-28

Abstract

The utility model provides a just reversing switchable air pump of air inlet and outlet, includes casing, wallboard and installs two rotors in the casing, is equipped with air inlet and gas outlet on the casing, its characterized in that: the two rotors are the same two-leaf rotors, the two rotors are installed in the casing and meshed with each other, the rear end of the wallboard is sequentially provided with a gear box and a motor capable of rotating positively and negatively, the rotors are connected with the motor through a transmission gear in the gear box in a transmission manner and rotate in opposite directions, when the rotation direction of the motor is changed from positive rotation to reverse rotation, the exhaust direction is changed, and the air inlet and the air outlet are switched. The utility model has simple and compact structure and convenient operation, can realize the switching between the air inlet and the air outlet only by changing the rotation direction of the motor, and is convenient for air charging and air discharging.

Description

Air pump capable of switching air inlet and air outlet in forward and reverse directions

Technical Field

The utility model relates to an air pump, in particular to an air pump capable of switching an air inlet and an air outlet in forward and reverse rotation.

Background

Along with the continuous improvement of living standard, the inflatable tools such as mattresses, inflatable tents, inflatable swimming pools and the like are popularized, and the conventional air pump is inflated and sucked by means of a valve, so that two defects are brought: 1) Because the valve is required to be added for switching, the structure is complex, the assembly is not easy, and the cost is increased; 2) The valve action or the inlet and outlet actions are required to be switched, and the use is not fast and convenient.

Moreover, the conventional air pump for inflating the inflating tool adopts fan blades, so that the design difficulty of switching between an inlet and an outlet is high.

In addition, the Roots blower belongs to a positive displacement rotary blower, is a typical gas pressurizing and conveying machine, and utilizes the relative motion of two blade-shaped rotors in a cylinder to compress and convey gas. The Roots blower has simple structure, the rotor adopts involute or epicycloidal envelope as rotor processing molded line, each rotor and blade are identical, greatly reducing processing difficulty, convenient manufacture, and being widely applied to the fields of aquaculture oxygenation, sewage treatment aeration, cement transportation and the like, and also being applicable to gas transportation and pressurization in low-pressure occasions. However, switching of the air inlet and outlet of the existing rotor fan is not reported.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the air pump with the forward and reverse rotation switchable air inlet and outlet, which is reasonable and compact in structure and convenient to operate, aiming at the current state of the art.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a just reversing switchable air pump of air inlet and outlet, includes casing, wallboard and installs two rotors in the casing, is equipped with air inlet and gas outlet on the casing, its characterized in that: the two rotors are the same two-leaf rotors, the two rotors are installed in the casing and meshed with each other, the rear end of the wallboard is sequentially provided with a gear box and a motor capable of rotating positively and negatively, the rotors are connected with the motor through a transmission gear in the gear box in a transmission manner and rotate in opposite directions, when the rotation direction of the motor is changed from positive rotation to reverse rotation, the exhaust direction is changed, and the air inlet and the air outlet are switched.

As an improvement, the rotor adopts an envelope curve of involute or epicycloid, the inner cavity of the shell is a bilateral symmetry double-C-shaped involuted oblong cavity, the clearance between the rotor and the rotor, the clearance between the rotor and the shell and the clearance between the rotor and the wallboard are extremely small, the air inlet is formed at the middle position of the upper end of the shell, the middle position of the bottom of the inner cavity of the shell is provided with an exhaust cavity along the length direction, and the front end of the shell is provided with an exhaust port communicated with the exhaust cavity.

Further, the four corners of the rear end opening of the shell are provided with connecting lugs for installing the wallboard and the gear box, the four corners of the wallboard are provided with corresponding connecting through holes, the front end face of the gear box is provided with a corresponding connecting cover plate, and the gear box, the wallboard and the shell are connected and fixed through bolts.

Further, the transmission gears are left and right synchronous gears meshed with each other, a rotating shaft of the rotor penetrates through the wallboard to be connected with the corresponding transmission gears, and a gear meshed with one transmission gear is arranged on an output shaft of the motor.

Further, a bearing seat for bearing installation is arranged at the front end in the shell, and a rotating shaft of the rotor is installed on the bearing.

Preferably, the surface of the rotating shaft is provided with keyways, so that the cross section of the rotating shaft presents a cross structure, and corresponding keybars are distributed in the central hole of the rotor correspondingly.

Finally, the two ends of the rotor are provided with hollowed-out parts.

Compared with the prior art, the utility model has the advantages that: the principle of the Roots blower is adopted, two rotors are arranged in the casing and meshed with each other, and the rotors are driven by a motor capable of rotating positively and negatively, so that when the rotation direction of the motor is changed from forward rotation to reverse rotation, the exhaust direction is changed, and then the air inlet and the air outlet are switched, and any mechanical structure and cost are not required to be greatly increased. The utility model has simple and compact structure and convenient operation, can realize the switching between the air inlet and the air outlet only by changing the rotation direction of the motor, and is convenient for air charging and air discharging.

Drawings

FIG. 1 is an exploded view of an embodiment of the present utility model;

FIG. 2 is a top view of an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a rotor and shaft connection in accordance with an embodiment of the present utility model;

fig. 4a to 4f are sectional views showing respective states of the embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1, 2 and 3, an air pump capable of switching air inlet and exhaust ports in forward and reverse rotation comprises a casing 1, a wallboard 3, two rotors 2, a gear box 4 and a motor 6, wherein the two rotors 2, the gear box 4 and the motor 6 are arranged in the casing 1, an air inlet 11 and an air exhaust port 12 are arranged on the casing 1, the two rotors 2 are identical two-leaf rotors, the two rotors 2 are arranged in the casing 1 and meshed with each other, the gear box 4 and the motor 6 are sequentially arranged at the rear end of the wallboard 3, the motor 6 can rotate in forward and reverse directions, the rotors 2 are in transmission connection with the motor 6 through a transmission gear 5 in the gear box 4 and rotate in opposite directions, when the rotation direction of the motor 6 is changed from forward rotation to reverse rotation, the air exhaust direction is changed, and the air inlet 11 and the air exhaust port 12 are switched.

The concrete structure is as follows: the rotor 2 adopts involute or epicycloidal envelope curve, the inner cavity of the shell 1 is a bilateral symmetry double-C-shaped involuted oblong cavity, the clearance between the rotor 2 and the rotor 2, between the rotor 2 and the shell 1, between the rotor 1 and the wallboard 3 is very small, the air inlet 11 is arranged at the middle position of the upper end of the shell 1, the middle position of the bottom of the inner cavity of the shell 1 is provided with an exhaust cavity 10 along the length direction, and the front end of the shell 1 is provided with an exhaust port 12 communicated with the exhaust cavity 10. The four corners of the rear end opening part of the casing 1 are provided with connecting lugs 13 for installing the wallboard 3 and the gear box 4, the four corners of the wallboard 3 are provided with corresponding connecting through holes, the front end surface of the gear box 4 is provided with a corresponding connecting cover plate, and the gear box 4, the wallboard 3 and the casing 1 are connected and fixed through bolts. The transmission gear 5 is a left synchronous gear and a right synchronous gear which are meshed with each other, the rotating shaft 21 of the rotor 2 passes through the wallboard 3 and is connected with the corresponding transmission gear 5, for facilitating the installation and the fixation between the rotating shaft and the rotor, the surface of the rotating shaft 21 is provided with a key groove so that the section of the rotating shaft presents a cross structure, and correspondingly, the central hole of the rotor 2 is distributed with corresponding key bars, and for reducing the weight of the rotor 2, the two ends of the rotor 2 are provided with hollowed-out parts. The output shaft of the motor 6 is provided with a gear 61 which is meshed with one of the transmission gears 5, so that when the motor 6 rotates, the two rotors 2 rotate in opposite directions at the same speed, the front end in the casing 1 is provided with a bearing seat for bearing installation, and the rotating shaft 21 of the rotors 2 is installed on the bearing.

The working principle is as follows:

the two rotors rotate oppositely in the sealed cavities of the shell and the wallboard, gaps among the rotors and between the rotors, the shell and the wallboard are extremely small in the rotating process, so that the air inlet is in a vacuum state, air enters the air inlet cavity under the action of atmospheric pressure, meanwhile, the rotors, the wallboard and the shell form a sealed cavity, the air in the air inlet cavity is continuously brought to the exhaust port by the sealed cavity formed by the rotors in the rotating process of the rotors, and the air is pressurized due to backflow of high-pressure air at the exhaust side at the moment when the air reaches the exhaust port, so that the air conveying is completed. In this way, the air is continuously conveyed from the air inlet to the air outlet during the whole working process of the Roots blower.

Since the above-described operation characteristics allow the air to be exhausted in the reverse direction by both the forward rotation and the reverse rotation of the rotor 2, the intake port in the forward rotation of the rotor becomes the exhaust port in the reverse rotation.

The specific process is as follows:

fig. 4a to 4f are working schematic diagrams of the motor 6 in a forward rotation state, wherein the rotor 2 at the left side in fig. 4a and the casing 1 form a sealing cavity a, when the rotor 2 rotates to fig. 4b, the gas in the sealing cavity a rotates along with the rotation, and when fig. 4c, the gas in the sealing cavity a is pushed out by the rotor 2 to enter the exhaust cavity 10 and finally is exhausted from the exhaust port 12; at the same time, the air entering from the air inlet rotates along with the right rotor 2 into a sealing cavity B formed by the right rotor 2 and the machine shell, and continues to rotate to fig. 4d and 4e, and finally rotates to fig. 4f, and the air in the sealing cavity B is discharged from the air outlet 12.

When the motor 6 is reversed, the rotation direction of the two rotors 2 is changed, the reverse direction exhaust is realized, and the air inlet 11 becomes an air outlet.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. The utility model provides a just reversing switchable air pump of air inlet and outlet, includes casing, wallboard and installs two rotors in the casing, is equipped with air inlet and gas outlet on the casing, its characterized in that: the two rotors are the same two-leaf rotors, the two rotors are installed in the casing and meshed with each other, the rear end of the wallboard is sequentially provided with a gear box and a motor capable of rotating positively and negatively, the rotors are connected with the motor through a transmission gear in the gear box in a transmission manner and rotate in opposite directions, when the rotation direction of the motor is changed from positive rotation to reverse rotation, the exhaust direction is changed, and the air inlet and the air outlet are switched.

2. The air pump of claim 1, wherein: the rotor adopts involute or epicycloidal envelope curve, the inner chamber of casing is bilateral symmetry's long circular cavity that two C shapes closed, and the air inlet is seted up in the upper end middle part position of casing, and the inner chamber bottom intermediate position of casing has the exhaust chamber along length direction shaping, and the front end of casing is equipped with gas vent and exhaust chamber and is linked together.

3. The air pump of claim 2, wherein: the four corners of the rear end opening of the shell are provided with connecting lugs for installing the wallboard and the gear box, the four corners of the wallboard are provided with corresponding connecting through holes, the front end face of the gear box is provided with a corresponding connecting cover plate, and the gear box, the wallboard and the shell are connected and fixed through bolts.

4. An air pump according to claim 1 or 2 or 3, wherein: the transmission gear is a left synchronous gear and a right synchronous gear which are meshed with each other, a rotating shaft of the rotor penetrates through the wallboard to be connected with the corresponding transmission gear, and a gear meshed with one transmission gear is arranged on an output shaft of the motor.

5. The air pump of claim 4, wherein: the front end is equipped with the bearing frame that supplies the bearing to install in the casing, and the pivot of rotor is installed on the bearing.

6. The air pump of claim 5, wherein: the surface of the rotating shaft is provided with keyways, so that the section of the rotating shaft presents a cross structure, and corresponding keybars are distributed in the central hole of the rotor correspondingly.

7. The air pump of claim 6, wherein: the two ends of the rotor are provided with hollowed-out parts.