CN217036966U

CN217036966U - Protection type single-phase asynchronous motor

Info

Publication number: CN217036966U
Application number: CN202220132228.6U
Authority: CN
Inventors: 罗正平
Original assignee: Hunan Yingdexiang Electromechanical Technology Co ltd
Current assignee: Hunan Yingdexiang Electromechanical Technology Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-07-22
Anticipated expiration: 2032-01-18

Abstract

The utility model relates to the technical field of single-phase asynchronous motors, in particular to a protective single-phase asynchronous motor which comprises an output shaft penetrating through a motor shell, a fan arranged at one end of the motor shell and coaxially arranged with the output shaft, an end cover covering the outside of the fan, a ventilation structure arranged on the end cover and used for communicating the inside of the fan with the outside, and a driving shaft coaxially connected with the fan and movably penetrating through the end cover, wherein one end of the driving shaft, which is opposite to the output shaft, is respectively provided with a first gear and a limiting column which can be clamped and matched, the end surface of the end cover is fixedly provided with a sleeve which is sleeved on the outer wall of the driving shaft in a sliding manner, the sleeve is in threaded connection with a limiting screw, the limiting screw penetrates through the side wall of the sleeve and the outer wall of the driving shaft is provided with a first limiting groove and a second limiting groove which correspond to the limiting screw in a surrounding manner. When the fan is used in a low-temperature environment, the driving shaft on the fan can be selectively separated from the output shaft of the motor, so that the motor has higher electric energy conversion rate when used in the low-temperature environment.

Description

Protection type single-phase asynchronous motor

Technical Field

The utility model relates to the technical field of single-phase asynchronous motors, in particular to a protective single-phase asynchronous motor.

Background

The single-phase asynchronous motor is a low-power single-phase asynchronous motor powered by a single-phase alternating current power supply, the power design of the single-phase asynchronous motor is small, the single-phase asynchronous motor is generally not larger than 2kW, the single-phase asynchronous motor occupies most parts of the low-power asynchronous motor, a fan connected with a motor output shaft and an end cover covering the fan are generally arranged at the end part of the single-phase asynchronous motor, heat dissipation holes are formed in the end cover, when the single-phase asynchronous motor works, the fan also rotates, the exchange between air flow inside the motor and external air flow is accelerated by the rotation of the fan, and the working temperature of the motor is reduced.

In order to ensure that the fan can be started synchronously with the single-phase asynchronous motor, the fan in the existing single-phase asynchronous motor is generally directly connected with an output shaft of the motor, however, when the single-phase asynchronous motor is used, the temperature of the surrounding environment has a great influence on the heat dissipation of the motor, when the temperature of the surrounding environment is low, even the active heat dissipation can not be carried out, when the existing single-phase asynchronous motor works, the fan can carry out the heat dissipation along with the rotation of the single-phase asynchronous motor no matter how the temperature of the surrounding environment is, and the fan brings little resistance to the rotation of the single-phase asynchronous motor, so that the efficiency of converting electric energy of the single-phase asynchronous motor used in a low-temperature environment into mechanical energy is low.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a protective single-phase asynchronous motor, which can effectively reduce the resistance of the motor during working, realize higher electric energy conversion rate and solve the problem of lower electric energy conversion rate of the existing single-phase asynchronous motor during use in a low-temperature environment.

(II) technical scheme

In order to achieve the purposes of effectively reducing the resistance of the motor during working and realizing higher electric energy conversion rate, the utility model provides the following technical scheme: a protection type single-phase asynchronous motor comprises an output shaft penetrating through a motor shell, a fan and an end cover, wherein the fan is arranged at one end of the motor shell and is coaxially arranged with the output shaft, the end cover is covered outside the fan, a ventilation structure for communicating the interior of the fan with the outside is arranged on the end cover, the protection type single-phase asynchronous motor also comprises a driving shaft which is coaxially connected with the fan and movably penetrates through the end cover, a first gear and a limiting column which are matched in a clamping mode are respectively arranged at one end, opposite to the output shaft, of the driving shaft, a sleeve which is sleeved on the outer wall of the driving shaft in a sliding mode is fixedly arranged on the end face of the end cover, a limiting screw is connected to the sleeve in a threaded mode, the limiting screw penetrates through the side wall of the sleeve and is arranged, and a first limiting groove and a second limiting groove which correspond to the limiting screw are circumferentially arranged on the outer wall of the driving shaft.

Optionally, the high-speed transmission mechanism is arranged between the output shaft and the driving shaft, the high-speed transmission mechanism comprises an annular driving disc which is coaxially connected with the driving shaft through a first connecting rod, the inner side of the driving disc is provided with a gear tooth structure, the inner side of the driving disc is in transmission connection with the first gear through a second gear, the second gear is rotatably arranged in the end cover through a second connecting rod, the high-speed transmission mechanism further comprises a third limiting groove which is arranged on the outer wall of the driving shaft and corresponds to the limiting screw, and the third limiting groove is located between the first limiting groove and the second limiting groove.

Optionally, the number of the second gears is two, and the two second gears are symmetrically arranged on two sides of the first gear and are both meshed with the first gear and the inner side of the driving disc.

Optionally, a rotatable ball is embedded into a threaded end of the limit screw, and cross sections of the first limit groove and the second limit groove are semicircular.

Optionally, the ventilation structure is a plurality of through holes which are arranged on the end face of the end cover and are uniformly distributed, and the through holes are distributed in an annular array.

Optionally, a protruding ring is arranged at the end part of the motor shell, the outer diameter of the protruding ring is matched with the inner diameter of the end cover, and the end cover is fixed with the protruding ring through a fixing screw.

(III) advantageous effects

Compared with the prior art, the utility model provides a protective single-phase asynchronous motor which has the following beneficial effects:

1. the utility model can selectively connect or separate the driving shaft on the fan and the motor output shaft according to the temperature of the actual use environment of the motor, so that the motor can be effectively cooled when used in a high-temperature environment, and the resistance of the motor during working can be effectively reduced when used in a low-temperature environment, thereby realizing higher electric energy conversion rate;

2. according to the utility model, the output shaft is in transmission connection with the driving shaft through the high-speed transmission mechanism, so that the transmission ratio between the output shaft and the driving shaft can be increased, the driving shaft can rotate at a high speed, the heat dissipation effect of the motor is improved, and the service life of the motor in a high-temperature environment is prolonged;

3. according to the utility model, the two second gears are arranged, and after the first gear and the two second gears are linearly arranged, the radial displacement of the driving disc can be limited, so that the high-speed transmission mechanism can transmit more stably.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the present invention in partial cutaway configuration;

FIG. 3 is an enlarged view of the structure of FIG. 2B according to the present invention;

FIG. 4 is a schematic view of a stop screw according to the present invention;

FIG. 5 is a schematic view of the transmission structure of the driving shaft and the output shaft of the present invention;

FIG. 6 is an enlarged schematic view of the structure at A in FIG. 5 according to the present invention;

fig. 7 is a schematic front view of the structure of fig. 5 according to the present invention.

In the figure: 1. a motor housing; 2. an output shaft; 3. an end cap; 4. a ventilation structure; 5. a fan; 6. a drive shaft; 7. a first limit groove; 8. a limit screw; 9. a drive plate; 10. a first gear; 11. a second gear; 12. a first connecting rod; 13. a second connecting rod; 14. a limiting column; 15. a second limit groove; 16. a third limiting groove; 17. a convex ring; 18. a set screw; 19. a sleeve; 20. and a ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The embodiment is as follows: referring to fig. 1 to 7, an embodiment of the utility model provides a technical solution: a protective single-phase asynchronous motor comprises an output shaft 2 penetrating through a motor shell 1, a fan 5 arranged at one end of the motor shell 1 and coaxial with the output shaft 2, an end cover 3 covering the outside of the fan 5, and a ventilation structure 4 arranged on the end cover 3 and used for communicating the inside with the outside, wherein the ventilation structure 4 is a plurality of through holes uniformly distributed on the end surface of the end cover 3, the through holes are distributed in an annular array, the protective single-phase asynchronous motor also comprises a driving shaft 6 coaxially connected with the fan 5 and movably penetrating through the end cover 3, one end of the driving shaft 6 opposite to the output shaft 2 is respectively provided with a first gear 10 and a limiting column 14 which can be in clamping fit, the end surface of the end cover 3 is fixedly provided with a sleeve 19 which is sleeved on the outer wall of the driving shaft 6 in a sliding manner, the sleeve 19 is in threaded connection with a limiting screw 8, the limiting screw 8 penetrates through the side wall of the sleeve 19, the outer wall of the driving shaft 6 is surrounded by a first limiting groove 7 and a second limiting groove 15 which correspond to the limiting screw 8, when the threaded end of the limiting column 14 is embedded into the first limiting groove 7, the limiting column 14 at the end of the output shaft 2 is embedded into the tooth groove on the outer side of the first gear 10 at the end of the driving shaft 6, so that the output shaft 2 and the fan 5 can synchronously rotate, the motor at the moment is suitable for being used in the environment with higher temperature, when the threaded end of the limiting column 14 is embedded into the second limiting groove 15, the driving shaft 6 and the motor output shaft 2 are in a separated state, the motor at the moment is suitable for being used in the environment with lower temperature, and the resistance of the motor during working can be effectively reduced.

On the basis of the above embodiment, the present embodiment further includes a high-speed transmission mechanism disposed between the output shaft 2 and the driving shaft 6, the high-speed transmission mechanism includes an annular driving disc 9 coaxially connected with the driving shaft 6 through a first connecting rod 12, the inner side of the driving disc 9 has a gear tooth structure, the inner side of the driving disc 9 is in transmission connection with the first gear 10 through a second gear 11, the second gear 11 is rotatably disposed in the end cap 3 through a second connecting rod 13, the high-speed transmission mechanism further includes a third limiting groove 16 opened on the outer wall of the driving shaft 6 and corresponding to the limiting screw 8, the third limiting groove 16 is disposed between the first limiting groove 7 and the second limiting groove 15, the output shaft 2 is connected with the driving shaft 6 through the high-speed transmission mechanism, so that the transmission ratio between the output shaft 2 and the driving shaft 6 can be increased, the driving shaft 6 can rotate at a high speed, and the heat dissipation effect of the motor at this time is better, can be suitable for use in environments with higher temperature.

In order to improve the transmission stability among the first gear 10, the second gear 11 and the driving disc 9, on the basis of the above embodiment, the number of the second gears 11 of this embodiment is two, two second gears 11 are symmetrically arranged on two sides of the first gear 10 and are both meshed with the inner sides of the first gear 10 and the driving disc 9, and after the first gear 10 and the two second gears 11 are linearly arranged, the radial displacement of the driving disc 9 can be limited, so that the high-speed transmission mechanism can transmit more stably.

In order to reduce the resistance of the limit screw 8 to the rotation of the driving shaft 6, on the basis of the above embodiment, the rotatable ball 20 is embedded in the threaded end of the limit screw 8, the cross sections of the first limit groove 7 and the second limit groove 15 are semicircular, the limit screw 8 is in rolling contact with the inner wall of the first limit groove 7 or the inner wall of the second limit groove 15 through the ball 20, and compared with the direct sliding contact between the limit screw 8 and the inner wall of the first limit groove 7 or the inner wall of the second limit groove 15, the resistance borne by the driving shaft 6 is smaller.

In order to facilitate the installation and replacement of the fan 5, on the basis of the above embodiments, the end of the motor housing 1 of the present embodiment is provided with the protruding ring 17, the outer diameter of the protruding ring 17 is matched with the inner diameter of the end cover 3, and the end cover 3 is fixed with the protruding ring 17 through the fixing screw 18, which is beneficial to the detachment of the end cover 3 and the detachment and replacement of the fan 5 inside the end cover 3.

The working principle is as follows: firstly, the axial position of a driving shaft 6 in a single-phase asynchronous motor is adjusted according to the temperature of a use environment, when the adjustment is carried out, a limit screw 8 is unscrewed, the driving shaft 6 moves along the self axial direction, when the environment temperature is lower, a second limit groove 15 on the driving shaft 6 corresponds to the limit screw 8, when the temperature is higher, a first limit groove 7 on the driving shaft 6 corresponds to the limit screw 8, when the temperature is higher, a third limit groove 16 on the driving shaft 6 corresponds to the limit screw 8, after a gear is selected, the limit screw 8 is screwed into the corresponding limit groove, the motor can be used, thereby realizing the multi-gear speed change function of fan blades in the motor, so that when the motor is used in the environment with lower temperature, the conversion rate of the motor from electric energy to mechanical energy can be improved, and when an output shaft 2 of the motor is connected with the driving shaft 6 through a high-speed transmission mechanism for use, motor output shaft 2 is rotatory, and output shaft 2 drives driving-disc 9 and rotates, and driving-disc 9 drives first gear 10, drive shaft 6 and fan 5 rotation through two second gears 11, because high-speed drive mechanism has increased the drive ratio between output shaft 2 and the drive shaft 6, consequently, the slew velocity of fan 5 this moment is greater than motor output shaft 2's slew velocity, more is favorable to the heat dissipation of motor, and then the life of extension motor.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A protection type single-phase asynchronous motor is characterized in that: the motor comprises an output shaft (2) penetrating through a motor shell (1), a fan (5) arranged at one end of the motor shell (1) and coaxially arranged with the output shaft (2), an end cover (3) covered outside the fan (5), a ventilation structure (4) communicated with the interior of the fan and the outside is arranged on the end cover (3), the motor further comprises a driving shaft (6) coaxially connected with the fan (5) and movably penetrating through the end cover (3), a first gear (10) and a limiting column (14) which can be clamped and matched are respectively arranged at one end, opposite to the driving shaft (6) and the output shaft (2), of the driving shaft (6), a sleeve (19) sleeved on the outer wall of the driving shaft (6) in a sliding mode is fixedly arranged on the end face of the end cover (3), a limiting screw (8) is connected to the sleeve (19) in a threaded mode, and the limiting screw (8) penetrates through the side wall of the sleeve (19), and a first limiting groove (7) and a second limiting groove (15) which correspond to the limiting screw (8) are formed in the outer wall of the driving shaft (6) in a surrounding mode.

2. A protective single-phase asynchronous machine according to claim 1, characterized in that: still including setting up output shaft (2) with high-speed drive mechanism between drive shaft (6), high-speed drive mechanism include through first connecting rod (12) with drive shaft (6) coaxial coupling's annular driving-disc (9), driving-disc (9) inboard has the teeth of a cogwheel structure, driving-disc (9) inboard with through second gear (11) transmission connection between first gear (10), second gear (11) rotate through second connecting rod (13) and set up in end cover (3), high-speed drive mechanism is still including seting up in drive shaft (6) outer wall and with third spacing groove (16) that stop screw (8) are corresponding, third spacing groove (16) are located between first spacing groove (7) and second spacing groove (15).

3. A protective single-phase asynchronous machine according to claim 2, characterized in that: the number of the second gears (11) is two, and the two second gears (11) are symmetrically arranged on two sides of the first gear (10) and are meshed with the first gear (10) and the inner side of the driving disc (9).

4. A protective single-phase asynchronous machine according to claim 1, characterized in that: the threaded end of the limiting screw (8) is embedded with a rotatable ball (20), and the cross sections of the first limiting groove (7) and the second limiting groove (15) are semicircular.

5. A protective single-phase asynchronous machine according to claim 1, characterized in that: the ventilation structure (4) is a plurality of through holes which are uniformly distributed on the end face of the end cover (3), and the through holes are distributed in an annular array.

6. A protective single-phase asynchronous machine according to claim 1, characterized in that: the motor shell (1) is provided with a convex ring (17) at the end, the outer diameter of the convex ring (17) is matched with the inner diameter of the end cover (3), and the end cover (3) is fixed with the convex ring (17) through a fixing screw (18).