CN213808147U

CN213808147U - Cooling fan for variable frequency motor

Info

Publication number: CN213808147U
Application number: CN202021909018.0U
Authority: CN
Inventors: 吴放明; 濮晓明; 唐晓强
Original assignee: Wuxi Mingtong Power Accessories Co ltd
Current assignee: Wuxi Mingtong Power Accessories Co ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-07-27
Anticipated expiration: 2030-09-03

Abstract

The utility model discloses a cooling blower for variable frequency motor belongs to the relevant technical field of motor. Mainly include the fan housing, fan motor and flabellum, the one end of fan housing is equipped with the ventilation grid, still include the bearing frame, the flabellum, the driving disc, flexible pin and fastener, the motor mounting hole has been seted up on the ventilation grid, be equipped with the ring flange on the fan motor, be provided with the flange hole on the ring flange, the fastener includes the bolt, nut and flexible cover, flexible cover includes barrel and turn-ups body, the fixed center pin department that sets up at the fan housing of bearing frame, be provided with the pivot on the flabellum, the pivot rotationally sets up in the bearing frame, the driving disc is equipped with two and sets up respectively on the output shaft of fan motor and in the pivot, flexible pin sets up between two. The utility model discloses a cooling blower for variable frequency motor can reduce the vibration, guarantees the operation safety of flabellum simultaneously.

Description

Cooling fan for variable frequency motor

Technical Field

The utility model relates to a relevant technical field of motor, concretely relates to cooling blower for inverter motor.

Background

The cooling fan for the variable frequency motor mainly comprises a fan cover internally provided with a fan motor and is used for being arranged at the tail end of the variable frequency motor to carry out air cooling and heat dissipation on the variable frequency motor; a fan motor of an existing cooling fan is usually directly fixed on a fan cover through a supporting pipe, a fan blade is sleeved on the output end of the fan motor, vibration generated by the fan motor is easily conducted to drive the whole fan motor to vibrate, and the fan blade is also easily driven to vibrate along with the fan motor, so that the fan blade is easily in contact friction with the inner wall of the fan cover to generate noise and damage to parts.

Therefore, it is necessary to provide a cooling fan for an inverter motor to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: the utility model provides a cooling blower for inverter motor can effectively reduce the vibration, guarantees the operation safety of flabellum simultaneously.

In order to solve the technical problem, the utility model discloses a as follows technical scheme: a cooling fan for a variable frequency motor comprises a fan cover, a fan motor and fan blades, wherein a ventilation grid is arranged at one end of the fan cover; the cooling fan further comprises a bearing seat, fan blades, a transmission disc, flexible pins and fasteners, wherein motor mounting holes are formed in the ventilation grids, flange plates are arranged on the fan motors corresponding to the ventilation grids, flange holes are formed in the flange plates corresponding to the motor mounting holes, the fasteners comprise bolts, nuts and flexible sleeves, the flexible sleeves comprise barrel bodies and flanging bodies arranged at two ends of the barrel bodies, the flexible sleeves penetrate through the motor mounting holes, the flanging bodies are respectively located at two sides of the ventilation grids, the bolts penetrate through the flange holes and the flexible sleeves and are connected with the nuts, the bearing seat is fixedly arranged at the central shaft of the fan cover, a rotating shaft is arranged on the fan blades and can be rotatably arranged in the bearing seat, the transmission disc is provided with two parts and is respectively arranged on an output shaft of the fan motors and the rotating shaft, the flexible pin is arranged between the two transmission discs.

Furthermore, a supporting pipe is arranged on the side surface of the bearing seat, and one end, back to the bearing seat, of the supporting pipe is arranged on the wind hood.

Furthermore, a pin hole is formed in the transmission disc, and two ends of the flexible pin are respectively inserted into the pin holes on the corresponding side in a penetrating mode.

Furthermore, the number of the pin holes is three.

Furthermore, the number of the flexible pins corresponding to the pin holes is three.

Furthermore, four motor mounting holes are formed and distributed around the center of the ventilation grating, and four corresponding flange holes are formed.

Furthermore, the arc side wall of the fan housing is provided with a mounting hole.

The utility model has the beneficial technical effects that: the utility model relates to a cooling fan for variable frequency motor, the ventilation grid corresponding to the fan housing is provided with a flange plate on the fan motor and is fixed on the ventilation grid through a fastener, the fastener comprises a bolt, a nut and a flexible sleeve, the flexible sleeve comprises a cylinder body and flange bodies arranged at the two ends of the cylinder body, when the flexible sleeve is penetrated in the motor mounting hole, the two flange bodies are respectively positioned at the two sides of the ventilation grid, thereby the fan motor and the fan housing are isolated through the flexible sleeve, the vibration of the fan motor can be absorbed or weakened through the flexible sleeve, the vibration of the cooling fan is effectively reduced, the fan blade is rotationally connected on the fan housing through a bearing seat so as to be independently opened with the fan motor, the fan blade is in transmission connection with the fan motor through two transmission discs, the two transmission discs realize transmission through a flexible pin arranged between the two transmission discs, and further the vibration can be absorbed or weakened through the damping characteristic of the flexible pin, the contact friction between the fan blades and the inner wall of the fan cover due to the vibration of the fan motor is avoided, and the operation safety of the fan blades is guaranteed.

Drawings

The present invention will be further explained with reference to the drawings and examples.

In the figure: fig. 1 is a schematic view of the overall structure of a cooling fan for a variable frequency motor according to the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;

fig. 4 is an explosion schematic diagram of the internal structure of the cooling fan for the variable frequency motor according to the present invention;

in the figure:

100. a fan housing; 110. mounting holes; 120. a ventilation grille; 121. and a motor mounting hole.

200. A fan motor; 210. a flange plate; 211. and (4) flange holes.

300. A bearing seat; 310. and (5) supporting the tube.

400. A fan blade; 410. a rotating shaft.

500. A drive plate; 510. a pin hole.

600. A flexible pin.

700. A fastener; 710. a bolt; 720. a nut; 730. a flexible sleeve; 731. a barrel; 732. and a flanging body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the cooling fan for the inverter motor includes a fan housing 100, a fan motor 200 and fan blades 400 arranged inside the fan housing, wherein mounting holes 110 are formed in the arc-shaped side wall of the fan housing 100 corresponding to the inverter motor for fastening and mounting with the inverter motor, and when the cooling fan is used, the fan motor 200 which is opened drives the fan blades 400 to rotate to push air to move into the inverter motor quickly, so that the air cooling effect is achieved on the inverter motor.

As further shown in fig. 1, the cooling fan for the variable frequency motor of the present embodiment further includes a bearing seat 300 disposed in the inner cavity of the wind shield 100, a transmission plate 500, and a fastener 700.

One end of the fan housing 100 is provided with a ventilation grille 120, and referring to fig. 3, four motor mounting holes 121 are provided on the ventilation grille 120 corresponding to the fan motor 200, and are distributed around the center of the ventilation grille 120.

Fan motor 200 leans on the inside wall of ventilation grid 120 and is located the central axis position of fan housing 100, has a ring flange 210 at its one end fixed mounting that is close to ventilation grid 120 of fan motor 200, and its fixed mode accessible welding realizes, is provided with flange hole 211 corresponding motor mounting hole 121 on the ring flange 210, and the corresponding flange hole 211 is equipped with four in this embodiment equally.

As shown in fig. 4, the fastening member 700 is fixedly disposed in the flange hole 211 of the flange plate 210 and the motor mounting hole 121, the fastener 700 comprises a bolt 710, a nut 720 and a flexible sleeve 730, the flexible sleeve 730 comprises a cylinder 731 and flanging bodies 732 arranged at two ends of the cylinder 731, referring to fig. 3, the flexible sleeve 730 is inserted into the corresponding motor mounting hole 121, and the flanged bodies 121 at both ends of the cylinder 731 are respectively abutted against both sides of the ventilation grill 120, the bolt 710 passes through the flange hole 211 and the flexible sleeve 730, corresponding nuts 720 are screwed on the ends of the bolts 710 so that the flange 210 abuts against the inner sidewall of the ventilation grill 120, the bolts 710 and the nuts 720 contacting the flange 210 and the fan motor 200 are completely spaced from the ventilation grill 120 of the hood 100 by the flexible boot 730, so that the vibration of the fan motor 200 can be absorbed or weakened through the flexible sleeve 730, that is, the overall influence of the vibration of the fan motor 200 on the cooling fan of the embodiment is reduced.

Referring to fig. 1, the bearing housing 300 is disposed at a central axis of the fan housing 100, a plurality of support pipes 310 are disposed around a side surface of the bearing housing 300, three support pipes 310 are disposed in this embodiment, and one end of each support pipe 310 facing away from the bearing housing 300 abuts against a side wall of the fan housing 100 and is fastened to the fan housing 100 by bolts.

The fan 400 is close to the opening of the fan housing 100 and is coaxially disposed with the fan housing 100, a rotating shaft 410 is fixedly disposed at the center of the fan 400, and the rotating shaft 410 is rotatably disposed in the bearing housing 300 and penetrates through the bearing housing 300.

Referring to fig. 4, there are two driving disks 500, pin holes 510 are circumferentially formed on the driving disks 500, and three, but not limited to three, pin holes 510 are formed in the embodiment, two driving disks 500 are fixedly disposed on the output shaft of the fan motor 200 and the end of the rotation shaft 410, respectively, a flexible pin 600 is disposed between the two driving disks 500, and both ends of the flexible pin 600 are inserted and fixed in the pin holes 510 formed in the two driving disks 500, respectively, three flexible pins 600 are formed corresponding to the pin holes 510 in the embodiment, and the flexible pin 600 is made of a rubber material in the embodiment, so that the two driving disks 500 are drivingly connected by the flexible pin 600, that is, the torque of the fan motor 200 is transmitted to the fan blade 400 by the driving disks 500 and the flexible pins 600, so that the fan blade 400 and the fan motor 200 are partially separated from each other, and the flexible pin 600 can bear compression or tension force in the axial direction, also can bear radial distortion power, thereby the atress through flexible pin 600 warp and absorb or weaken the diversified vibration that fan motor 200 produced, thereby avoid flabellum 400 to receive great vibration influence and take place the contact friction with fan housing 100 inner wall, better protection has been played to flabellum 400, and flexible pin 600 still can be cushioned the huge moment of torsion impact that produces in the twinkling of an eye to fan motor 200 with the flexonics of driving disc 500, reduce the damage of impact to flabellum 400 promptly, the operation safety of equipment has been guaranteed.

The following description of the working process of the cooling fan for the variable frequency motor in the utility model is combined with the drawings:

fan motor 200 starts to drive one of them transmission dish 500 and rotates, is transmitted circumferential force to another transmission dish 500 by flexible pin 600 to drive pivot 410 rotatory on bearing frame 300, drive flabellum 400 and rotate, thereby promote the air current from ventilation grid 120 to fan housing 100 open position quick travel, play the effect of cooling to the inverter motor who installs this embodiment cooling blower.

The utility model discloses a cooling blower for variable frequency motor, fan motor 200 is last to be provided with ring flange 210 corresponding to ventilation grid 120 of fan housing 100, and fix on ventilation grid 120 through fastener 700, fastener 700 includes bolt 710, nut 720 and flexible cover 730, flexible cover 730 includes barrel 731 and sets up in the turn-ups body 732 of barrel 731 both ends, when flexible cover 730 wears to establish in motor mounting hole 121, two turn-ups body 121 are located the both sides of ventilation grid 120 respectively, thereby keep apart fan motor 200 and fan housing 100 through flexible cover 730, make the vibration of fan motor 200 can absorb or weaken through flexible cover 730, reduced the whole influence of fan motor 200 vibration to cooling blower, flabellum 400 rotates to be connected on fan housing 100 through bearing frame 300 and thus independently opens with fan motor 200, flabellum 400 is connected through the transmission of two driving discs 500 with fan motor 200, and the two transmission discs 500 realize transmission through the flexible pins 600 arranged between the two transmission discs, so that vibration can be absorbed or weakened through the damping characteristics of the flexible pins 600, and the fan blades 400 are prevented from being influenced by vibration and being in contact friction with the inner wall of the fan housing 100, namely, the operation safety of the fan blades 400 is ensured.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a cooling blower for inverter motor, includes fan housing (100), fan motor (200) and flabellum (400), the one end of fan housing (100) is equipped with ventilation grid (120), its characterized in that: the cooling fan further comprises a bearing seat (300), fan blades (400), a transmission disc (500), a flexible pin (600) and a fastener (700), a motor mounting hole (121) is formed in the ventilation grille (120), a flange plate (210) is arranged on the fan motor (200) corresponding to the ventilation grille (120), a flange hole (211) is formed in the flange plate (210) corresponding to the motor mounting hole (121), the fastener (700) comprises a bolt (710), a nut (720) and a flexible sleeve (730), the flexible sleeve (730) comprises a cylinder (731) and flanging bodies (732) arranged at two ends of the cylinder (731), the flexible sleeve (730) penetrates through the motor mounting hole (121), the flanging bodies (732) are respectively located on two sides of the ventilation grille (120), and the bolt (710) penetrates through the flange hole (211) and the flexible sleeve (730) and is connected with the nut (720), bearing frame (300) is fixed to be set up in the center pin department of fan housing (100), be provided with pivot (410) on flabellum (400), pivot (410) rotationally set up in bearing frame (300), driving plate (500) be equipped with two and set up respectively on the output shaft of fan motor (200) and on pivot (410), flexible pin (600) set up between two driving plates (500).

2. The cooling fan for the variable frequency motor according to claim 1, wherein: a supporting pipe (310) is arranged on the side surface of the bearing seat (300), and one end, back to the bearing seat (300), of the supporting pipe (310) is arranged on the fan cover (100).

3. The cooling fan for the variable frequency motor according to claim 1, wherein: the transmission disc (500) is provided with pin holes (510), and two ends of the flexible pin (600) are respectively inserted into the pin holes (510) on one corresponding side.

4. The cooling fan for the variable frequency motor according to claim 3, wherein: the number of the pin holes (510) is three.

5. The cooling fan for the variable frequency motor according to claim 4, wherein: the number of the flexible pins (600) is three corresponding to the pin holes (510).

6. The cooling fan for the variable frequency motor according to claim 1, wherein: four motor mounting holes (121) are formed and distributed around the center of the ventilation grille (120), and four corresponding flange holes (211) are also formed.

7. The cooling fan for the variable frequency motor according to claim 1, wherein: and the arc side wall of the fan cover (100) is provided with a mounting hole (110).