CN218570014U

CN218570014U - High-reliability eccentric shaft motor and electric air pump

Info

Publication number: CN218570014U
Application number: CN202221918222.8U
Authority: CN
Inventors: 利秀芳
Original assignee: Jiangmen Huachuang Motor Co ltd
Current assignee: Jiangmen Huachuang Motor Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2023-03-03
Anticipated expiration: 2032-07-21

Abstract

The utility model discloses a high reliability eccentric shaft motor and electronic air pump. The eccentric shaft motor is provided with a motor base, a rotor and a stator, and a motor shaft is fixed on the rotor. The motor shaft comprises a main shaft, an eccentric wheel and an eccentric pendulum, wherein the eccentric wheel and the eccentric pendulum are integrally formed with the main shaft. The eccentric wheel and the eccentric pendulum are arranged along the axial direction of the main shaft in a staggered mode. The projections of the respective centers of gravity of the eccentric and eccentric pendulum on the cross section of the main shaft are arranged opposite to each other by 180 DEG with respect to the main shaft. The diameter of the eccentric wheel is larger than that of the main shaft. The distance n between the gravity center of the eccentric wheel and the main shaft is smaller than the distance m between the gravity center of the eccentric pendulum and the main shaft. The eccentric wheel, the eccentric pendulum and the main shaft cannot be loosened, so that the assembly precision is guaranteed, and the reliability of long-term operation is improved. The assembling process of the eccentric wheel, the eccentric pendulum and the main shaft is saved, the assembling time is saved, and the production efficiency is improved.

Description

High-reliability eccentric shaft motor and electric air pump

Technical Field

The utility model relates to an electronic air pump field especially relates to a motor for piston electric air pump with eccentric shaft.

Background

At present, the pneumatic products such as the inflating pump and the vehicle-mounted air valve motor on the market compress air through the motor and the air pressurizing assembly, and the pressurizing assembly is the most common piston air compressing mechanism. The motor shaft and the eccentric pendulum are split, and the eccentric pendulum is mostly fixed on the motor shaft in a jackscrew or interference fit mode. The fit tolerance of the motor shaft and the eccentric pendulum is difficult to be effectively guaranteed, the phenomenon of looseness and even slippage between the motor shaft and the eccentric pendulum is easily caused, so that the current of the motor is unstable and even the air pump can not be pressurized, and the production efficiency of the split structure is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, the high reliability eccentric shaft motor of being convenient for installation.

In order to achieve the above object, the utility model discloses a high reliability eccentric shaft motor has motor cabinet, rotor and stator, is fixed with the motor shaft on the rotor. The motor shaft includes the main shaft to and eccentric wheel and the eccentric pendulum with main shaft integrated into one piece. The eccentric wheel and the eccentric pendulum are arranged along the axial direction of the main shaft in a staggered mode. The projections of the respective centers of gravity of the eccentric and the eccentric pendulum on the cross section of the main shaft are arranged 180 ° opposite to the main shaft. The diameter of the eccentric wheel is larger than that of the main shaft. The distance n between the gravity center of the eccentric wheel and the main shaft is smaller than the distance m between the gravity center of the eccentric pendulum and the main shaft.

Therefore, the eccentric wheel can be movably connected with the connecting rod of the air compressing assembly through the bearing, the eccentric wheel and the eccentric pendulum are integrally connected with the main shaft of the motor shaft, and the eccentric wheel, the eccentric pendulum and the main shaft cannot be loosened, so that the assembly precision is guaranteed, and the reliability of long-term operation is improved. The assembling process of the eccentric wheel, the eccentric pendulum and the main shaft is saved, the assembling time is saved, and the production efficiency is improved.

Further, m > 1.5n. The eccentric wheel is convenient to install a bearing with larger size, and the operation reliability is improved.

Furthermore, the eccentric pendulum is T-shaped, and one end of the eccentric pendulum away from the main shaft has a larger width. The rotary inertia of the motor rotor is effectively improved on the premise of limited mass, the load shifting of the motor is buffered, and the fluctuation range of the motor current is reduced.

Further, the eccentric pendulum comprises a T-shaped pendulum bob and a U-shaped filling part. One side of the pendulum bob, which is close to the main shaft, is provided with a groove which extends along the tangential direction of the main shaft. The pendulum bob and the filling part jointly form a cylinder coaxial with the main shaft. The density p of the bob is greater than the density k of the filling. The density of the filling part is lower than that of the pendulum bob, so that the gravity center of the eccentric pendulum deviates from the axis of the main shaft. The shape of the cylinder coaxial with the main shaft can greatly reduce the stirring resistance when the eccentric pendulum contacts the engine oil in the oil cylinder, and reduce the energy consumption.

Further, p > 3k. The diameter of the eccentric pendulum cylinder is reduced, and the overall size is reduced.

Further, one side of the filling part, which is far away from the pendulum bob, is provided with grooves arranged along the radial direction of the cylinder, and the grooves extend to the side face of the cylinder. The recess acquires machine oil when contacting with machine oil, when the recess turned to the piston of compressor assembly, gets rid of machine oil to the piston, does benefit to the inside lubrication efficiency who improves compressor assembly, improves operational reliability.

Further, the groove is positioned on one side of the filling part close to the eccentric wheel. The middle part of the groove facing the piston is facilitated, and the uniformity of engine oil distribution is improved.

Furthermore, the eccentric wheel is positioned on one side of the eccentric pendulum away from the stator. The motor rotor is assembled, and then the connecting rod of the air compression assembly and the bearing between the connecting rod and the eccentric wheel are directly sleeved. The assembly process is simplified, and the assembly efficiency is improved.

Further, the first part of the main shaft is positioned on one side of the eccentric wheel and the eccentric pendulum close to the stator. The second part of the main shaft is located on the side of the eccentric and eccentric pendulum remote from the stator. The bearing is favorably arranged at the second part of the motor main shaft, the bending strength of the motor main shaft is improved, and the running reliability of the motor is improved.

Another object of the present invention is to provide an electric air pump with a simple structure and high reliability which is easy to install.

In order to realize the purpose, the utility model discloses an electronic air pump has motor and pressure boost subassembly, and the motor is aforementioned arbitrary high reliability eccentric shaft motor, and pressure boost subassembly is pressed from both sides the air through piston rod mechanism.

Therefore, the electric air pump has the advantages of being easy to install and high in reliability.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is a perspective view of the motor shaft of the present invention;

FIG. 4 is a perspective view of the improved motor shaft of the present invention;

fig. 5 is a perspective view of a motor shaft after further improvement of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 and 2, the highly reliable eccentric shaft motor 0001 for the electric air pump 1000 includes a motor base 001, a rotor 002 to which the motor shaft 200 is fixed, and a stator 003. The motor shaft 200 includes a main shaft 210, and an eccentric wheel 220 and an eccentric pendulum 230 integrally formed with the main shaft 210. The eccentric wheel 220 and the eccentric pendulum 230 are arranged offset in the axial direction of the main shaft 210. The projections of the respective centers of gravity of eccentric wheel 220 and eccentric pendulum 230 onto the cross section of main shaft 210 are opposite to each other by 180 ° with respect to the main shaft. The diameter of the eccentric 220 is larger than the diameter of the main shaft 210. The distance n between the center of gravity of eccentric wheel 220 and main shaft 210 is less than the distance m between the center of gravity of eccentric pendulum 230 and main shaft 210. Preferably, m > 1.5n.

Preferably, the eccentric 220 is located on the side of the eccentric pendulum 230 remote from the stator 003.

Preferably, the first part 211 of the main shaft 210 is located on the side of the eccentric 220 and the eccentric pendulum 230 close to the stator 003. That is, the first portion 211 is closer to the stator 003 than the eccentric 220 and the eccentric pendulum 230. The second part 212 of the main shaft 210 is located on the side of the eccentric 220 and the eccentric pendulum 230 remote from the stator 003. That is, the second portion 212 is farther from the stator 003 than the eccentric 220 and the eccentric pendulum 230.

As shown in fig. 3, the eccentric pendulum 230 preferably has a T-shape, and an end of the eccentric pendulum 230 far from the main shaft 210 has a larger width.

The direction F is used as the die parting direction, so that the grooving depth of the die is reduced, the die parting resistance is reduced, the die is simplified, the manufacturing efficiency is improved, and the production cost is reduced.

As shown in fig. 4, the eccentric pendulum 2230 preferably includes a pendulum 2240 having a T shape and a filling part 2250 having a U shape. The side of the pendulum 2240 near the spindle 2210 is provided with a groove 2241 extending tangentially along the spindle 2210. The pendulum 2240 and the filling part 2250 together form a cylinder 2260 coaxial with the spindle 2210. The density p of the bob 2240 is greater than the density k of the filling part 2250. Preferably, p > 3k. For example, pendulum 2240 is made of 45# steel, and filling 2250 is made of transparent PP plastic to form cylinder 2260 with pendulum 2240 by two-shot molding. The groove 2241 effectively improves the connection strength of the filling part 2250 with the pendulum 2240. Preferably, the pendulum 2240 is provided with a plurality of grooves 2241 at both side surfaces thereof.

As shown in fig. 5, preferably, a side of the filling part 3250 away from the bob 3240 is provided with a groove 3261 arranged radially along a cylinder 3260, and the groove 3261 extends to a side surface 3262 of the cylinder 3260.

Preferably, the groove 3261 is located on a side of the filling portion 3250 adjacent to the eccentric 3220.

Referring to fig. 2, the electric air pump 1000 includes a high-reliability eccentric shaft motor 0001 and an air compressing assembly 0002. The pneumatic assembly 0002 has a cylinder 1100, a piston linkage 1200 and a cylinder 1300. A cylinder passage 1110, an intake passage 1120, and an exhaust passage 1130 are provided in the cylinder 1100. The inlet port 1120 is provided with a check valve 1121, and the outlet port 1130 is provided with a check valve 1131. The intake port 1120 and the exhaust port 1130 communicate with the upper side of the cylinder passage 1110. The piston link mechanism 1200 includes a piston 1210 and a link 1220. One end of the connecting rod 1220 is movably connected with the piston 1210 through a bolt 1221, and the other end is movably connected with the eccentric wheel through a bearing 1222. Piston 1210 can slide back and forth within cylinder bore 1110 without blocking intake port 1120 and exhaust port 1130. The first part 211 of the main shaft 210 is supported on the motor mount 001 by two bearings 213, and the second part 212 is mounted on the housing 1301 of the oil cylinder 1300 by a bearing 214.

Claims

1. High reliability eccentric shaft motor has motor cabinet, rotor and stator, be fixed with the motor shaft on the rotor, its characterized in that:

the motor shaft comprises a main shaft, an eccentric wheel and an eccentric pendulum which are integrally formed with the main shaft;

the eccentric wheel and the eccentric pendulum are arranged along the axial direction of the main shaft in a staggered manner;

the projections of the respective centers of gravity of the eccentric and the eccentric pendulum on the cross section of the main shaft are opposite to each other by 180 DEG relative to the main shaft;

the diameter of the eccentric wheel is larger than that of the main shaft;

the distance n between the gravity center of the eccentric wheel and the main shaft is smaller than the distance m between the gravity center of the eccentric pendulum and the main shaft.

2. The highly reliable eccentric shaft motor according to claim 1, wherein:

m＞1.5n。

3. the highly reliable eccentric shaft motor of claim 1, wherein:

the eccentric pendulum is T-shaped, and one end of the eccentric pendulum, which is far away from the main shaft, has larger width.

4. The highly reliable eccentric shaft motor according to claim 1, wherein:

the eccentric pendulum comprises a T-shaped pendulum bob and a U-shaped filling part;

one side of the pendulum bob, which is close to the main shaft, is provided with a groove which extends along the tangential direction of the main shaft;

the pendulum bob and the filling part jointly form a cylinder coaxial with the main shaft;

the pendulum has a density p greater than a density k of the filler.

5. The highly reliable eccentric shaft motor according to claim 4, wherein:

p＞3k。

6. the highly reliable eccentric shaft motor of claim 5, wherein:

one side of the filling part, which is far away from the pendulum bob, is provided with a groove which is arranged along the radial direction of the cylinder;

the groove extends to the side of the cylinder.

7. The highly reliable eccentric shaft motor according to claim 6, wherein:

the groove is positioned on one side of the filling part close to the eccentric wheel.

8. The highly reliable eccentric shaft motor according to any one of claims 1 to 7, wherein:

the eccentric wheel is positioned on one side of the eccentric pendulum far away from the stator.

9. The highly reliable eccentric shaft motor according to any one of claims 1 to 7, wherein:

the first part of the main shaft is positioned on one side of the eccentric wheel and the eccentric pendulum close to the stator;

the second part of the main shaft is located on the side of the eccentric wheel and the eccentric pendulum away from the stator.

10. Electronic air pump has motor and pressure boost subassembly, its characterized in that:

the motor is the high-reliability eccentric shaft motor in claim 9, and the pressurizing assembly is pressurized through a piston connecting rod mechanism.