Air pump structure

Abstract

An air pump structure comprises a cylinder body, a cylinder cover, a piston and a motor, the piston is a connecting rod piston and can be installed in the cylinder body in a front-back moving mode, and a connecting rod of the piston is in transmission connection with the motor through an eccentric block, and is characterized in that an L-shaped support is arranged at the rear end of the cylinder body, the motor is installed on the inner side face of the support, and the motor is a brushless motor; the brushless motor comprises a base with a bottom plate and a steel shell, the base is fixed to the support through the bottom plate, a magnetic shoe is annularly inlaid in the inner wall of the steel shell to serve as a rotor, a stator with a coil winding is arranged in the middle of the interior of the steel shell, the stator is connected with the base through a center shaft, and an eccentric block is arranged at the upper end of the steel shell and fixedly connected with the steel shell. The steel shell and the magnetic shoe rotate around the stator so as to drive the eccentric block to rotate. The transmission device is reasonable and compact in structure, convenient to install, stable in structure, good in transmission stability, small in size and convenient to assemble and transport.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of inflating equipment and relates to a compact air pump structure which is easy to install. BACKGROUND

[0002] An air pump is a device that removes air from a closed space or adds air to a closed space. The working principle of the air pump is as follows: when the motor is running, the valve of the communicating vessel is opened by the air pressure of the atmosphere when air is pumped out, and the gas enters the cylinder, and when the tire is inflated, the valve is closed by the air pressure in the cylinder, and the gas enters the tire. The traditional air pump generally comprises a cylinder, a valve seat with an air inlet valve and an air outlet valve, and a cylinder cover. When the piston moves upward, the air inlet valve is closed and the air outlet valve is opened, and the gas is discharged from the air outlet through the air outlet valve. When the piston moves downward, the air inlet valve is opened and the gas enters the cylinder, and the air outlet valve is closed. The up-and-down movement of the piston in the cylinder sleeve is driven by the motor, the eccentric gear is engaged with the output gear of the motor, the eccentric shaft of the eccentric gear is rotatably connected with the lower end of the piston connecting rod, and the connecting rod is moved up and down by the rotation of the eccentric gear, thereby realizing the up-and-down movement of the piston in the cylinder sleeve. In the existing structure, the motor is installed on the outer side of the bracket, the eccentric gear is installed on the inner side of the bracket, and the eccentric gear is engaged with the output gear of the motor. This structure is not only inconvenient to install, but also has a large overall volume, which is not conducive to installation and carrying.

[0003] According to the investigation, the existing patent No. CN201920950843.6 Chinese patent "inflating pump structure of plastic cylinder", including cylinder, cylinder cover and piston part installed in the cylinder, drive mechanism includes motor, motor is installed on the outer side of the bracket, eccentric gear is installed on the inner side of the bracket, eccentric gear is engaged with the output gear of the motor, eccentric shaft of eccentric gear is rotatably connected with the lower end of the connecting rod, connecting rod is moved up and down by the rotation of eccentric gear, thereby realizing the up-and-down movement of the piston in the cylinder sleeve. The structure of the air pump is the same as the prior art, and the above-mentioned defects still exist. SUMMARY

[0004] The utility model solves the technical problem in the prior art and provides an air pump structure which is simple, compact, stable and easy to install.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an air pump structure, including a cylinder body, a cylinder head, a piston, and a motor. The piston is a connecting rod piston, which is installed in the cylinder body and can move back and forth. The connecting rod of the piston is connected to the motor through an eccentric block. The characteristic is that: an L-shaped bracket is provided at the rear end of the cylinder body, the motor is installed on the inner side of the bracket, the motor is a brushless motor, the brushless motor includes a base with a bottom plate and a steel shell, the base is fixed to the bracket through the bottom plate, the inner wall of the steel shell is circumferentially inlaid with magnetic tiles as rotors, a stator with coil windings is provided in the middle of the steel shell, the stator is connected to the base through a central shaft, and the eccentric block is provided at the upper end of the steel shell and fixedly connected to the steel shell. When the motor is powered on, the steel shell and the magnetic tiles rotate around the stator, thereby driving the eccentric block to rotate.

[0006] As an improvement, the base plate is circular, and the inner side of the transverse section of the bracket is formed with a corresponding circular groove. The base plate is set in the circular groove and fixed to the bracket by screws. The stator is coaxially set outside the base and fixed to the base by the central shaft. The eccentric block is a circular block corresponding to the upper end face of the steel shell. One side of the upper end face of the eccentric block is provided with an eccentric shaft connected to the piston. Several countersunk holes are opened on the other side of the eccentric block. The upper end face of the steel shell is provided with corresponding screw holes. The eccentric block is fixedly connected to the steel shell by screws.

[0007] Furthermore, a circular slot is provided at the rear end of the piston connecting rod, and a bearing is installed in the circular slot. The eccentric shaft of the eccentric block passes through the bearing and is rotatably connected to the connecting rod through a snap ring.

[0008] Furthermore, the cylinder body is horizontally arranged on the upper outer side of the vertical section of the bracket. The cylinder body and the bracket are separate parts, and the vertical section of the bracket has a hollowed-out part corresponding to the rear end opening of the cylinder body.

[0009] Furthermore, the cylinder head has protruding connecting posts at its four corner edges that abut against the bracket, and corresponding connecting countersunk holes are provided on the vertical section of the bracket. The cylinder head mating cover is located at the front end of the cylinder body and is fixed to the connecting posts by bolts passing through the connecting countersunk holes.

[0010] Finally, a circular groove is recessed at the edge of the front end face of the cylinder body, and a first O-ring is embedded in the circular groove. A second O-ring and a spring are provided at the center hole of the front end of the cylinder body.

[0011] Compared with existing technologies, the advantages of this utility model are as follows: The motor uses a brushless motor, resulting in a smaller size. The motor is mounted on the inner side of the bracket instead of the traditional outer side, greatly simplifying installation and making the structure more stable and reliable, improving transmission smoothness and load-bearing capacity. Furthermore, the use of the motor's steel casing to drive the eccentric block further reduces the overall size, facilitating carrying, transportation, and storage. This utility model has a reasonable and compact structure, featuring convenient installation, good transmission smoothness, and small size, making it easy to assemble and transport. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural exploded view of an embodiment of the present application;

[0013] Figure 2 is a front view of Figure 1

[0014] Figure 3 is an exploded view of Figure 1

[0015] Figure 4 is an exploded view of an embodiment of the present application. DETAILED DESCRIPTION

[0016] The present application will be further described in detail below with reference to the embodiments of the drawings.

[0017] As shown in Figures 1 to 4 , a gas pump structure comprises a cylinder body 1, a cylinder cover 2, a piston 6, a motor 3, a bracket 4 and an eccentric block 5, the piston 6 is a connecting rod piston, the piston 6 is movably installed in the cylinder body 1, the connecting rod 61 of the piston 6 is in transmission connection with the motor 3 through the eccentric block 5, the bracket 4 is L-shaped, the motor 3 is installed on the inner side surface of the bracket 4, the motor 3 adopts a brushless motor 3, the brushless motor 3 comprises a base 32 with a bottom plate 30 and a steel shell 31, the base 32 is fixed with the bracket 4 through the bottom plate 30, the inner wall of the steel shell 31 is inlaid with a magnetic shoe 34 as a rotor in a ring shape, a stator 33 with a coil winding is arranged in the middle of the steel shell 31, the stator 33 is connected with the base 32 through a center shaft 35, the eccentric block 5 is arranged on the upper end of the steel shell 31 and is fixedly connected with the steel shell 31, when the motor 3 is powered on and operated, the steel shell 31 and the magnetic shoe 34 rotate around the stator 33, thereby driving the eccentric block 5 to rotate.

[0018] Specific structure is that the bottom plate 30 is circular, the inner side surface of the transverse section 41 of the bracket 4 is formed with a corresponding circular groove 411, the bottom plate 30 is arranged in the circular groove 411 and is fixed with the bracket 4 through a screw, the stator 33 is coaxially arranged outside the base 32 and is fixed with the base 32 through the center shaft 35, the eccentric block 5 is a circular block corresponding to the upper end surface of the steel shell 31, the upper end surface of the eccentric block 5 protrudes with an eccentric shaft 51 connected with the connecting rod 61 of the piston 6 on one side, three counterbores are arranged on the other side of the eccentric block 5, the upper end surface of the steel shell 31 is provided with corresponding screw holes 311, the eccentric block 5 is fixedly connected with the steel shell 31 through a screw. A circular slot hole 60 is arranged at the rear end of the connecting rod 61 of the piston 6, a bearing 7 is installed in the circular slot hole 60, the eccentric shaft 51 of the eccentric block 5 passes through the bearing 6 and is rotationally connected with the connecting rod 61 through a circlip 70.

[0019] ​​The cylinder body 1 is transversely arranged on the upper part of the outer side of the vertical section 42 of the support 4, the cylinder body 1 and the support 4 are separate parts, the vertical section of the support 4 is provided with a hollow part corresponding to the rear end opening of the cylinder body 1. The four corner edges of the cylinder cover 2 are provided with connecting columns 21 abutting against the support 4, the vertical section 42 of the support 4 is provided with corresponding connecting counterbores 421, the cylinder cover 2 is arranged on the front end of the cylinder body 1 and is fixed by screws passing through the connecting counterbores 421 and the connecting columns 21.

[0020] The front end face of the cylinder body 1 is concavely provided with a circular groove 11, the first O-shaped sealing ring 8 is embedded in the circular groove 11, and the second O-shaped sealing ring 9 and the elastic sheet 10 are arranged at the center hole position of the front end of the cylinder body 1.

[0021] The structure principle of the cylinder body 1 and the cylinder cover 2 is consistent with the prior art, and will not be described here.

[0022] The working principle is that the brushless motor 3 drives the eccentric block 5 to rotate, the eccentric block 5 drives the piston 6 to move forward and backward in the cylinder body 1, and air intake and air suction are realized.

[0023] Since the brushless motor 3 of the embodiment is small in size and is arranged on the inner side of the support 4, the installation of the brushless motor 3 and the eccentric block 5 is more convenient, the overall structure is more stable and reliable, the transmission stability and the carrying capacity are improved, the overall size of the air pump is reduced, and the air pump is convenient to carry, transport and store.

[0024] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the technical principles of the present application, and these improvements and refinements should also be regarded as the protection range of the present application.

Claims

1. An air pump structure, comprising a cylinder body, a cylinder head, a piston, and a motor, wherein the piston is a connecting rod piston, and the piston is mounted in the cylinder body in a manner that allows it to move back and forth; the connecting rod of the piston is connected to the motor via an eccentric block, characterized in that: The rear end of the cylinder body is provided with an L-shaped support, the motor is installed on the inner side of the support, the motor is a brushless motor, the brushless motor comprises a base provided with a bottom plate and a steel shell, the base is fixed with the support through the bottom plate, the inner wall of the steel shell is inlaid with magnetic tiles as a rotor in a ring shape, a stator provided with coil winding is arranged in the middle of the steel shell, the stator is connected with the base through a center shaft, an eccentric block is arranged on the upper end of the steel shell and is fixedly connected with the steel shell, when the motor is powered on and operated, the steel shell and the magnetic tiles rotate around the stator, thereby driving the eccentric block to rotate.

2. The air pump structure according to claim 1, characterized by: The bottom plate is circular, the inner side of the transverse section of the support is formed with a corresponding circular groove, the bottom plate is arranged in the circular groove and is fixed with the support through screws, the stator is coaxially arranged outside the base and is fixed with the base through the center shaft, the eccentric block is a circular block corresponding to the upper end surface of the steel shell, the upper end surface of the eccentric block protrudes on one side with an eccentric shaft connected with the piston, a plurality of counterbores are formed on the other side of the eccentric block, the upper end surface of the steel shell is provided with corresponding screw holes, and the eccentric block and the steel shell are fixedly connected through screws.

3. The gas pump structure according to claim 2, wherein: The rear end of the piston is provided with a circular groove, a bearing is installed in the circular groove, and the eccentric shaft of the eccentric block is rotatably connected with the connecting rod through a snap spring by penetrating through the bearing.

4. The air pump structure according to claim 3, characterized by: The cylinder body is transversely arranged on the outer side of the upper part of the vertical section of the support, the cylinder body and the support are separate parts, and the vertical section of the support is provided with a hollow part corresponding to the rear end opening of the cylinder body.

5. The air pump structure according to claim 4, characterized by: The four corner edges of the cylinder cover protrude with connecting columns abutting against the support, corresponding connecting counterbores are formed on the vertical section of the support, the cylinder cover is arranged on the front end of the cylinder body, and is fixed through bolts penetrating through the connecting counterbores and the connecting columns.

6. The gas pump structure according to claim 1 or 2 or 3, wherein: The front end surface edge of the cylinder body is recessed with a circular groove, a first O-shaped sealing ring is embedded in the circular groove, and a second O-shaped sealing ring and an elastic sheet are arranged at the center hole position of the front end of the cylinder body.

Images