Portable double-cylinder inflator pump

Abstract

The utility model belongs to the technical field of inflation equipment, and particularly relates to a portable double-cylinder inflator pump, which comprises a motor, a cylinder body support and a cylinder assembly, the cylinder assembly adopts double cylinders, the cylinder body support is L-shaped and comprises a vertical plate and a transverse plate, the vertical plate is rotatably connected with a driven gear which is axially and transversely arranged, and the driven gear is rotatably connected with the motor. The air cylinder assembly comprises a cylinder sleeve arranged at the upper end of the vertical plate and a connecting rod with the upper end arranged in the cylinder sleeve in a sliding mode, the lower end of the connecting rod is connected to the driven gear, the end, away from the vertical plate, of the transverse plate is connected with the motor, and the axial direction of the motor is transversely arranged. A driving gear meshed with the driven gear is arranged on a rotor shaft of the motor, and a battery located on the side edge of the air cylinder assembly is arranged above the motor. The utility model has the advantages of compact layout, short overall length and small volume.

Description

Technical field:

[0001] The utility model belongs to the technical field of inflatable equipment, in particular to a portable double-cylinder inflatable pump. Background technology:

[0002] A portable car air pump is a small, portable device that can be used to inflate car tires in an emergency. With the increase in car ownership and people's emphasis on driving safety, portable car air pumps have become one of the must-have equipment for many car owners.

[0003] The Chinese utility model (Announcement No. CN218717308U, application date 2022.11.22, announcement date 2023.03.24) discloses a double-cylinder movement of an air pump, including a motor, a cylinder support and a cylinder assembly. The cylinder assembly adopts a double cylinder, and the cylinder assembly includes an integrally formed double-cylinder cylinder sleeve, an integrally formed double-cylinder cylinder head and two sets of connecting rod assemblies with piston rings. The double-cylinder cylinder sleeve is installed at the upper end of the cylinder support, and the double-cylinder cylinder head is arranged on the double-cylinder cylinder sleeve. The connecting rod assembly can be installed in the cylinder support so as to move up and down, and the piston ring is arranged in the corresponding cylinder sleeve. The lower end of the connecting rod assembly is connected to the motor through a large gear. The lower end of the cylinder support is provided with a motor fixing seat, and the motor is fixed below the motor fixing seat by screws. The lower end of the motor is connected with a blade; the large gear is vertically installed in the cylinder support, and a small gear is provided on the motor output shaft to mesh with the large gear. A circular gear mounting seat for mounting a large gear is vertically formed in the middle of the cylinder bracket. A bearing is arranged in the gear mounting seat. The large gear is mounted on the left side of the gear mounting seat. A gear is formed along the circumference of the right end face of the large gear to mesh with the small gear on the motor output shaft. An eccentric convex shaft is arranged on the left end face of the large gear to connect with the lower end of the left connecting rod assembly. An eccentric wheel is arranged on the right side of the gear mounting seat. A rotating shaft is convexly arranged in the middle of the right end face of the large gear to pass through the bearing and be fixedly connected with the eccentric wheel by screws. An eccentric shaft is convexly arranged on the right end face of the eccentric wheel to connect with the lower end of the right connecting rod assembly. The position of the eccentric convex shaft corresponds to the rotating shaft of the large gear in an up-down alignment structure. The small gear is a conical bevel gear. Two upper and lower shock-absorbing pads are respectively installed on the front and rear sides of the cylinder bracket. An air outlet and a sensor air collection outlet are arranged between the two cylinder heads in the middle of the double-cylinder cylinder head. An air pipe is connected to the air outlet, and an air nozzle is installed at the head of the air pipe.

[0004] The disadvantage of the above-mentioned double-cylinder movement of the air pump is that the connecting rod of the cylinder and the axial direction of the motor are both arranged vertically, the overall length is long, and the volume is large. Summary of the invention:

[0005] The utility model aims to provide a portable double-cylinder air pump with compact layout, short overall length and small volume.

[0006] The utility model is achieved in this way:

[0007] A portable double-cylinder air pump comprises a motor, a cylinder support and a cylinder assembly. The cylinder assembly adopts a double cylinder. The cylinder support is L-shaped and comprises a vertical plate and a horizontal plate. The vertical plate is rotatably connected to a driven gear axially arranged in the horizontal direction. The cylinder assembly comprises a cylinder sleeve arranged at the upper end of the vertical plate and a connecting rod slidably arranged in the cylinder sleeve at the upper end. The lower end of the connecting rod is connected to the driven gear. The end of the horizontal plate away from the vertical plate is connected to the motor. The axial direction of the motor is arranged in the horizontal direction. A driving gear meshing with the driven gear is provided on the rotor shaft of the motor. A battery located on the side of the cylinder assembly is provided above the motor.

[0008] In the above-mentioned portable double-cylinder air pump, the driven gear and the driving gear are both cylindrical gears.

[0009] In the above-mentioned portable double-cylinder air pump, the transverse plate is a downwardly convex arc plate, the driving gear is arranged in the arc plate, and mounting columns are respectively provided on the front and rear sides of the arc plate, and screws pass through the mounting columns and are screwed to the motor.

[0010] In the above-mentioned portable double-cylinder air pump, the mounting column and the arc-shaped plate are an integrated structure.

[0011] In the above-mentioned portable double-cylinder air pump, a gasket is provided between each mounting column and the motor, and the gasket is an integrated gasket.

[0012] In the above-mentioned portable double-cylinder air pump, the driven gear is arranged on the right side of the vertical plate, and arc-shaped baffles are respectively provided on the front and rear sides of the driven gear. The arc-shaped baffles are arranged around the outer periphery of the driven gear, and the left end of the arc-shaped baffle is arranged on the vertical plate, and is an integrated structure with the vertical plate.

[0013] In the above-mentioned portable double-cylinder air pump, the cylinder sleeve includes a left cylinder sleeve and a right cylinder sleeve, and the connecting rod includes a left connecting rod and a right connecting rod. The upper end of the left connecting rod is slidably disposed in the left cylinder sleeve, and the upper end of the right connecting rod is slidably disposed in the right cylinder sleeve. The left cylinder sleeve is disposed on the left side of the vertical plate, and the right cylinder sleeve is disposed on the right side of the vertical plate. A left connecting block is provided at the lower right part of the left cylinder sleeve, and a right connecting block is provided at the lower left part of the right cylinder sleeve. The left connecting block is disposed above the vertical plate and is an integrated structure with the vertical plate. A connecting plate is provided below the right connecting block, and the connecting plate is attached to the right side of the vertical plate and is fixedly connected to the vertical plate.

[0014] In the above-mentioned portable double-cylinder air pump, the connection plate and the vertical plate are fixedly connected in a manner that the rod of the screw passes through the vertical plate and is screwed to the connection plate.

[0015] In the above-mentioned portable double-cylinder air pump, the left connecting block conflicts with the right connecting block.

[0016] In the above-mentioned portable double-cylinder air pump, a left pipe joint is provided at the upper end of the left cylinder sleeve, and a right pipe joint matching with the left pipe joint is provided at the upper end of the right cylinder sleeve. The left pipe joint and the right pipe joint are connected to each other. Left mounting plates are respectively provided on the front and rear sides of the left pipe joint, and right mounting plates are respectively provided on the front and rear sides of the right pipe joint. Each left mounting plate is connected to the corresponding right mounting plate by fasteners.

[0017] In the above-mentioned portable double-cylinder air pump, the structure of the fastener may be: the fastener is a screw, and the stem of the screw passes through the left mounting plate and is screwed to the right mounting plate.

[0018] In the above-mentioned portable dual-cylinder air pump, the structure of the fastener may also be: the fastener is a bolt and a nut, and the rod of the bolt passes through the left mounting plate and the right mounting plate and is threadedly connected to the nut.

[0019] In the above-mentioned portable dual-cylinder air pump, the left pipe joint, the left cylinder sleeve, and the left connecting block are an integrated structure, the vertical plate and the horizontal plate are an integrated structure, and the right pipe joint, the right cylinder sleeve, the right connecting block, and the connecting plate are an integrated structure.

[0020] In the above-mentioned portable double-cylinder air pump, the lower end of the arc-shaped baffle is arranged on the transverse plate and is an integrated structure with the transverse plate.

[0021] In the above-mentioned portable double-cylinder air pump, air outlet holes are provided above the left pipe joint and the right pipe joint, the air outlet hole of the left pipe joint and / or the air outlet hole on the right pipe joint is provided with an air nozzle, the left pipe joint or the outer end of the left pipe joint is provided with an air pipe, and a pressure sensor is provided on the air pipe.

[0022] In the above-mentioned portable double-cylinder air pump, a rotating shaft is rotatably connected on the vertical plate, the left end of the rotating shaft is connected to the cam, and the right end is connected to the driven gear, the cam and the driven gear are respectively located on the left and right sides of the vertical plate, the lower end of the left connecting rod is connected to the cam through the left connecting shaft, and the lower end of the right connecting rod is connected to the driven gear through the right connecting shaft, the left connecting shaft and the right connecting shaft present an up-and-down alignment structure, the distance between the axis center of the left connecting shaft and the axis center of the rotating shaft is equal to the distance between the axis center of the right connecting shaft and the axis center of the rotating shaft, and the distance is 7mm-8mm, and the inner diameter of the left cylinder sleeve and the right cylinder sleeve is 20mm-24mm.

[0023] In the above-mentioned portable double-cylinder air pump, the lower end of the left connecting rod is rotatably connected to the left connecting shaft through a bearing, and the lower end of the right connecting rod is rotatably connected to the right connecting shaft through a bearing.

[0024] In the above-mentioned portable dual-cylinder air pump, it also includes a shell and a controller, and the shell is provided with a lamp bead, a TYPE-C interface, a USB interface, a power interface, and a button. The motor, battery, lamp bead, TYPE-C interface, USB interface, power interface, and button are electrically connected to the controller respectively.

[0025] In the above-mentioned portable double-cylinder air pump, the lamp bead has two lighting modes. The first mode is that the white light is always on for lighting; the second mode is that the SOS light flashes for asking for help.

[0026] In the above-mentioned portable dual-cylinder air pump, the TYPE-C interface is used to charge the battery to realize the wireless inflation function. The power interface is used to connect to an external 12V power supply. When the battery is out of power, it can be directly plugged in. The USB interface is used to power external products and used as a mobile power supply. The button is used to control the lamp mode and the speed of the motor to adjust the inflation volume.

[0027] In the above-mentioned portable dual-cylinder air pump, the pressure sensor is electrically connected to the controller.

[0028] In the above-mentioned portable double-cylinder air pump, the shell is composed of a front shell, a rear shell, an upper shell and a lower shell.

[0029] In the above-mentioned portable double-cylinder air pump, an outer cover is provided around the outer periphery of the shell.

[0030] The outstanding advantages of the utility model compared with the prior art are:

[0031] 1. The utility model sets the connecting rod of the cylinder assembly vertically through the cylinder bracket, sets the axial direction of the motor horizontally, and sets a battery above the motor. The battery is set on the side of the cylinder assembly, effectively utilizing the free space above the motor, with a compact layout, short overall length and small volume;

[0032] 2. The left pipe joint, left cylinder sleeve, left connecting block, vertical plate and horizontal plate of the utility model are an integrated structure, and the right pipe joint, right cylinder sleeve, right connecting block and connecting plate are an integrated structure, with fewer assembly steps and high efficiency;

[0033] 3. The upper parts of the left cylinder body and the right cylinder body of the utility model are connected by a left connecting block and a right connecting block, and the upper ends of the left cylinder body and the right cylinder body are connected by a vertical plate and a connecting plate, and the connection is firm and reliable. Description of the drawings:

[0034] Figure 1 It is a three-dimensional diagram of the utility model;

[0035] Figure 2 It is a three-dimensional diagram of the utility model without the front shell and the outer shell;

[0036] Figure 3 It is a left side view of the motor, cylinder support and cylinder assembly of the utility model.

[0037] Figure numerals: 1. motor; 2. cylinder bracket; 2a. vertical plate; 2b. horizontal plate; 3. driven gear; 4. cylinder sleeve; 4a. left cylinder sleeve; 4b. right cylinder sleeve; 5. connecting rod; 5a. left connecting rod; 5b. right connecting rod; 6. driving gear; 7. battery; 8. mounting column; 9. arc baffle; 10. left connecting block; 11. right connecting block; 12. connecting plate; 13. left pipe joint; 14. right pipe joint; 15. left mounting plate; 16. right mounting plate; 17. air nozzle; 18. rotating shaft; 19. cam; 20. left connecting shaft; 21. right connecting shaft; 22. housing; 23. lamp beads; 24. TYPE-C interface; 25. USB interface; 26. power interface; 27. button; 28. outer cover. Specific implementation method:

[0038] The present invention is further described below with reference to specific embodiments. Figure 1 —3:

[0039] A portable double-cylinder air pump comprises a motor 1, a cylinder support 2 and a cylinder assembly. The cylinder assembly adopts a double cylinder. The cylinder support 2 is L-shaped and comprises a vertical plate 2a and a horizontal plate 2b. A driven gear 3 axially arranged in a horizontal direction is rotatably connected to the vertical plate 2a. The cylinder assembly comprises a cylinder sleeve 4 arranged at the upper end of the vertical plate 2a and a connecting rod 5 slidably arranged in the cylinder sleeve 4 at the upper end. The lower end of the connecting rod 5 is connected to the driven gear 3. The end of the horizontal plate 2b away from the vertical plate 2a is connected to the motor 1. The axial direction of the motor 1 is arranged in a horizontal direction. A driving gear 6 meshing with the driven gear 3 is provided on the rotor shaft of the motor 1. A battery 7 located on the side of the cylinder assembly is provided above the motor 1.

[0040] In this embodiment, the left-right direction is the horizontal direction, the front-back direction is the longitudinal direction, and the up-down direction is the vertical direction.

[0041] like Figure 2 As shown, the utility model sets the connecting rod 5 of the cylinder assembly vertically through a cylinder body bracket, sets the axial direction of the motor 1 horizontally, and sets a battery 7 above the motor 1. The battery 7 is set on the side of the cylinder assembly, which effectively utilizes the free space above the motor 1, has a compact layout, a short overall length, and a small volume.

[0042] Furthermore, the driven gear 3 and the driving gear 6 are both cylindrical gears.

[0043] In order to better protect the driving gear 6, the transverse plate 2b is a downwardly convex arc plate, and the driving gear 6 is arranged in the arc plate. The front and rear sides of the arc plate are respectively provided with mounting columns 8, and the screws pass through the mounting columns 8 and are screwed to the motor 1. The structure is simple, easy to install, and the connection is firm and reliable.

[0044] Furthermore, the mounting column 8 and the arc-shaped plate are an integrated structure.

[0045] In order to prevent the mounting column 8 from imprinting the surface of the motor 1 and to prevent the screws from loosening, a gasket is provided between each mounting column 8 and the motor 1, and the gasket is an integrated gasket.

[0046] In order to rationally utilize the space and protect the driven gear 3, the driven gear 3 is arranged on the right side of the vertical plate 2a, and arc-shaped baffles 9 are respectively provided on the front and rear sides of the driven gear 3. The arc-shaped baffles 9 are arranged around the outer periphery of the driven gear 3, and the left end of the arc-shaped baffle 9 is arranged on the vertical plate 2a, and is an integrated structure with the vertical plate 2a.

[0047] The structure of the cylinder assembly: Figure 2 , 3 As shown, the cylinder sleeve 4 includes a left cylinder sleeve 4a and a right cylinder sleeve 4b, and the connecting rod 5 includes a left connecting rod 5a and a right connecting rod 5b. The upper end of the left connecting rod 5a is slidably arranged in the left cylinder sleeve 4a, and the upper end of the right connecting rod 5b is slidably arranged in the right cylinder sleeve 4b. The left cylinder sleeve 4a is arranged on the left side of the vertical plate 2a, and the right cylinder sleeve 4b is arranged on the right side of the vertical plate 2a. A left connecting block 10 is arranged at the lower right part of the left cylinder sleeve 4a, and a right connecting block 11 is arranged at the lower left part of the right cylinder sleeve 4b. The left connecting block 10 is arranged above the vertical plate 2a and is an integrated structure with the vertical plate 2a. A connecting plate 12 is arranged below the right connecting block 11, and the connecting plate 12 is attached to the right side of the vertical plate 2a and is fixedly connected to the vertical plate 2a. The structure is simple and easy to install.

[0048] The connection plate 12 and the vertical plate 2 a are fixedly connected in the following manner: the shank of the screw passes through the vertical plate 2 a and is screwed to the connection plate 12 .

[0049] Furthermore, the left connecting block 10 conflicts with the right connecting block 11 .

[0050] In order to connect the left cylinder liner 4a and the right cylinder liner 4b more tightly, a left pipe joint 13 is provided at the upper end of the left cylinder liner 4a, and a right pipe joint 14 matching the left pipe joint 13 is provided at the upper end of the right cylinder liner 4b. The left pipe joint 13 and the right pipe joint 14 are connected to each other. Left mounting plates 15 are respectively provided on the front and rear sides of the left pipe joint 13, and right mounting plates 16 are respectively provided on the front and rear sides of the right pipe joint 14. Each left mounting plate 15 is connected to the corresponding right mounting plate 16 by fasteners.

[0051] The structure of the fastener is as follows: the fastener is a screw, the shank of the screw passes through the left mounting plate 15 and is screwed to the right mounting plate 16 .

[0052] In order to reduce the assembly steps and improve the assembly efficiency, the left pipe joint 13, the left cylinder sleeve 4a, and the left connecting block 10 are an integrated structure, and the vertical plate 2a and the transverse plate 2b are an integrated structure, that is, the left pipe joint 13, the left cylinder sleeve 4a, the left connecting block 10, the vertical plate 2a, and the transverse plate 2b are an integrated structure, and the right pipe joint 14, the right cylinder sleeve 4b, the right connecting block 11, and the connecting plate 12 are an integrated structure.

[0053] Furthermore, the lower end of the arc-shaped baffle plate 9 is arranged on the transverse plate 2b, and is an integrated structure with the transverse plate 2b.

[0054] In order to facilitate the adjustment of the air outlet position, air outlet holes are provided above the left pipe joint 13 and the right pipe joint 14, and an air nozzle 17 is provided on the air outlet hole of the left pipe joint 13 and / or the air outlet hole on the right pipe joint 14. An air pipe is provided at the left pipe joint 13 or the outer end of the left pipe joint 13, and a pressure sensor is provided on the air pipe to facilitate the control of tire pressure and realize automatic stopping after inflation reaches the set pressure.

[0055] In this embodiment, an air nozzle 17 is provided on the air outlet of the left pipe joint 13 , and a plug is provided on the air outlet of the right pipe joint 14 .

[0056] The connection structure between the connecting rod 5 and the driven gear 3 is as follows: Figure 2 , 3 As shown, the vertical plate 2a is rotatably connected with a rotating shaft 18, the left end of the rotating shaft 18 is connected to a cam 19, and the right end is connected to the driven gear 3, the cam 19 and the driven gear 3 are respectively located on the left and right sides of the vertical plate 2a, the lower end of the left connecting rod 5a is connected to the cam 19 through a left connecting shaft 20, and the lower end of the right connecting rod 5b is connected to the driven gear 3 through a right connecting shaft 21, the left connecting shaft 20 and the right connecting shaft 21 present an upper and lower alignment structure, the distance between the axis of the left connecting shaft 20 and the axis of the rotating shaft 18 is equal to the distance between the axis of the right connecting shaft 21 and the axis of the rotating shaft 18, and the distance is 7mm-8mm, and the inner diameter of the left cylinder sleeve 4a and the right cylinder sleeve 4b is 20mm-24mm. The stroke of the connecting rod 5 is lengthened, the inner diameter of the cylinder sleeve 4 is increased, the flow rate of the compressed gas is increased, and the gas outlet efficiency is improved.

[0057] In this embodiment, the distance between the axis of the left connecting shaft 20 and the axis of the rotating shaft 18, and the distance between the axis of the right connecting shaft 21 and the axis of the rotating shaft 18 are 7.5 mm, and the inner diameters of the left cylinder sleeve 4a and the right cylinder sleeve 4b are 22 mm.

[0058] Furthermore, the lower end of the left connecting rod 5a is rotatably connected to the left connecting shaft 20 through a bearing, and the lower end of the right connecting rod 5b is rotatably connected to the right connecting shaft 21 through a bearing.

[0059] In order to realize the multi-function of the air pump, such as Figure 1 , 2 As shown, it also includes a shell 22 and a controller, and the shell 22 is provided with a lamp bead 23, a TYPE-C interface 24, a USB interface 25, a power interface 26, and a button 27. The motor 1, the battery 7, the lamp bead 23, the TYPE-C interface 24, the USB interface 25, the power interface 26, and the button 27 are electrically connected to the controller respectively.

[0060] The lamp bead 23 has two lighting modes. The first mode is a constant white light for lighting; the second mode is a SOS flashing mode for asking for help.

[0061] The TYPE-C interface 24 is used to charge the battery 7 to realize the wireless inflation function. The power interface 26 is used to connect to an external 12V power supply. When the battery is out of power, it can be directly plugged into the power supply. The USB interface 25 is used to power external products and used as a mobile power supply. The button 27 is used to control the lamp mode and the speed of the motor 1 to adjust the inflation volume.

[0062] Furthermore, the pressure sensor is electrically connected to the controller.

[0063] The structure of the shell 22: The shell 22 is composed of a front shell, a rear shell, an upper shell and a lower shell.

[0064] In order to enhance the strength of the front shell and the rear shell, an outer cover 28 is provided around the outer periphery of the housing 22 .

[0065] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A portable double-cylinder air pump, comprising a motor (1), a cylinder support (2) and a cylinder assembly, wherein the cylinder assembly adopts a double cylinder. Features: The cylinder support (2) is L-shaped and comprises a vertical plate (2a) and a horizontal plate (2b). A driven gear (3) arranged axially in the horizontal direction is rotatably connected to the vertical plate (2a). The cylinder assembly comprises a cylinder sleeve (4) arranged at the upper end of the vertical plate (2a) and a connecting rod (5) whose upper end is slidably arranged in the cylinder sleeve (4). The lower end of the connecting rod (5) is connected to the driven gear (3). The end of the horizontal plate (2b) away from the vertical plate (2a) is connected to the motor (1). The axial direction of the motor (1) is arranged in the horizontal direction. A driving gear (6) meshingly connected with the driven gear (3) is provided on the rotor shaft of the motor (1). A battery (7) located on the side of the cylinder assembly is provided above the motor (1).

2. A portable double-cylinder air pump according to claim 1, Features: The transverse plate (2b) is a downwardly convex arc-shaped plate, the driving gear (6) is arranged in the arc-shaped plate, and mounting columns (8) are respectively provided on the front and rear sides of the arc-shaped plate, and screws pass through the mounting columns (8) and are screwed to the motor (1).

3. A portable double-cylinder air pump according to claim 1, Features: The driven gear (3) is arranged on the right side of the vertical plate (2a), and arc-shaped baffles (9) are respectively arranged on the front and rear sides of the driven gear (3). The arc-shaped baffles (9) are arranged around the outer periphery of the driven gear (3), and the left end of the arc-shaped baffle (9) is arranged on the vertical plate (2a), and the arc-shaped baffles (9) are an integrated structure with the vertical plate (2a).

4. A portable double-cylinder air pump according to claim 1, Features: The cylinder sleeve (4) comprises a left cylinder sleeve (4a) and a right cylinder sleeve (4b); the connecting rod (5) comprises a left connecting rod (5a) and a right connecting rod (5b); the upper end of the left connecting rod (5a) is slidably arranged in the left cylinder sleeve (4a); the upper end of the right connecting rod (5b) is slidably arranged in the right cylinder sleeve (4b); the left cylinder sleeve (4a) is arranged on the left side of the vertical plate (2a); the right cylinder sleeve (4b) is arranged on the right side of the vertical plate (2a); a left connecting block (10) is arranged at the lower right side of the left cylinder sleeve (4a); a right connecting block (11) is arranged at the lower left side of the right cylinder sleeve (4b); the left connecting block (10) is arranged above the vertical plate (2a) and is an integrated structure with the vertical plate (2a); a connecting plate (12) is arranged below the right connecting block (11); the connecting plate (12) is fitted on the right side of the vertical plate (2a) and is fixedly connected to the vertical plate (2a).

5. A portable double-cylinder air pump according to claim 4, Features: The upper end of the left cylinder sleeve (4a) is provided with a left pipe joint (13), and the upper end of the right cylinder sleeve (4b) is provided with a right pipe joint (14) matched with the left pipe joint (13). The left pipe joint (13) and the right pipe joint (14) are communicated with each other. The left pipe joint (13) is provided with a left mounting plate (15) on both sides of the front and rear, and the right pipe joint (14) is provided with a right mounting plate (16) on both sides of the front and rear. Each left mounting plate (15) is connected to the corresponding right mounting plate (16) by a fastener.

6. A portable double-cylinder air pump according to claim 5, Features: The left pipe joint (13), the left cylinder sleeve (4a), and the left connecting block (10) are an integrated structure, the vertical plate (2a) and the horizontal plate (2b) are an integrated structure, and the right pipe joint (14), the right cylinder sleeve (4b), the right connecting block (11), and the connecting plate (12) are an integrated structure.

7. A portable double-cylinder air pump according to claim 5, Features: An air outlet is provided above the left pipe joint (13) and the right pipe joint (14); an air nozzle (17) is provided on the air outlet of the left pipe joint (13) and / or the air outlet on the right pipe joint (14); an air pipe is provided at the outer end of the left pipe joint (13) or the right pipe joint (13); and a pressure sensor is provided on the air pipe.

8. A portable double-cylinder air pump according to claim 4, Features: A rotating shaft (18) is rotatably connected to the vertical plate (2a). The left end of the rotating shaft (18) is connected to a cam (19), and the right end is connected to the driven gear (3). The cam (19) and the driven gear (3) are respectively located on the left and right sides of the vertical plate (2a). The lower end of the left connecting rod (5a) is connected to the cam (19) through a left connecting shaft (20), and the lower end of the right connecting rod (5b) is connected to the driven gear (3) through a right connecting shaft (21). The left connecting shaft (20) and the right connecting shaft (21) present an upper-lower alignment structure. The distance between the axis of the left connecting shaft (20) and the axis of the rotating shaft (18) is equal to the distance between the axis of the right connecting shaft (21) and the axis of the rotating shaft (18), and the distance is 7mm-8mm. The inner diameters of the left cylinder sleeve (4a) and the right cylinder sleeve (4b) are 20mm-24mm.

9. A portable double-cylinder air pump according to claim 1, Features: The invention also comprises a housing (22) and a controller, wherein the housing (22) is provided with a lamp bead (23), a TYPE-C interface (24), a USB interface (25), a power interface (26), and a button (27), and the motor (1), a battery (7), the lamp bead (23), the TYPE-C interface (24), the USB interface (25), the power interface (26), and the button (27) are electrically connected to the controller respectively.

Images