CN215486726U

CN215486726U - Speed regulation fan structure based on PWM control mode

Info

Publication number: CN215486726U
Application number: CN202121611798.5U
Authority: CN
Inventors: 周盼; 曾广磊; 徐海杰
Original assignee: Shanghai Yingtong Electric Co ltd
Current assignee: Shanghai Yingtong Electric Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-01-11
Anticipated expiration: 2031-07-15

Abstract

The utility model relates to the technical field of speed-regulating fans, and particularly discloses a speed-regulating fan structure based on a PWM (pulse-width modulation) control mode, which comprises an outer shell, a motor mounting seat, a fan blade mounting seat and a metal mesh enclosure, wherein a driving motor is mounted inside the motor mounting seat, four connecting rods are fixedly connected to the back surface of the motor mounting seat at equal intervals in an annular mode by taking the center of the motor mounting seat as an original point, the four connecting rods are respectively and fixedly connected to the back surface of the outer shell and are close to the positions of four corners, the output end of the driving motor is fixedly connected with a connector, the middle part of the fan blade mounting seat is fixedly connected with a connecting sleeve, the connecting sleeve is detachably and fixedly connected to the top of the connector, fan blades are fixedly connected to the edge of the fan blade mounting seat at equal intervals in an annular mode by taking the center of the fan blade mounting seat as the original point, and the metal mesh enclosure is detachably inserted in the front surface of the outer shell; the fan blade mounting seat is convenient to disassemble and clean, and the problems of dust splashing and low efficiency in the cleaning process are solved.

Description

Speed regulation fan structure based on PWM control mode

Technical Field

The utility model relates to the technical field of speed-regulating fans, in particular to a speed-regulating fan structure based on a PWM control mode.

Background

The most widely used method for controlling the rotational speed of a dc fan is PWM control, in which a PWM driving signal is applied to a field effect transistor connected to a high side or a low side of the fan, the fan is turned on and off at a specific frequency, and the rotational speed of the fan is controlled by the duty ratio of the PWM signal.

The problem of the direct current fan ubiquitous clearance difficulty with PWM control at present, because the flabellum of fan is together fixed with the motor, the clearance is hardly dismantled to the flabellum to the staff, can only sweep away the accumulational dust of flabellum through the brush at quick-witted incasement, can lead to the dust to spatter all around like this, plays good clearance effect, receives the restriction of frame volume simultaneously, still need spend a large amount of time just can sweep the dust clean, the cleaning process is wasted time and energy.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a speed regulation fan structure based on a PWM control mode, which has the advantages of convenience in disassembly and assembly for cleaning and the like, and solves the problem that the traditional speed regulation fan is inconvenient to clean.

The utility model relates to a speed regulation fan structure based on a PWM control mode, which comprises an outer shell, a motor mounting seat, a fan blade mounting seat and a metal mesh enclosure, the driving motor is arranged in the motor mounting seat, the back of the motor mounting seat is fixedly connected with four connecting rods at equal intervals in an annular manner by taking the center of the motor mounting seat as an original point, the four connecting rods are respectively and fixedly connected with the back of the outer shell and are close to the positions of four corners, the motor mounting seat is positioned at the central position of the outer shell, the output end of the driving motor is fixedly connected with a connector, the middle part of the fan blade mounting seat is fixedly connected with a connecting sleeve which is detachably and fixedly connected with the top of the connector, the edge of flabellum mount pad uses the center of flabellum mount pad as the origin fixedly connected with fan leaf of equidistance annular, metal screen panel can dismantle the grafting in the front of shell body.

Through the design of the technical scheme, the fan blade mounting base is convenient for workers to detach, convenience is provided for cleaning fan blades, and the problems of dust splashing and low efficiency in the traditional cleaning process are solved.

As a further improvement of the utility model, four fixing rods are integrally formed at the edge of the metal mesh enclosure in an annular and equidistant manner by taking the center of the metal mesh enclosure as an original point, and an internal threaded column is fixedly connected to one side of each fixing rod far away from the center of the metal mesh enclosure.

As a further improvement of the utility model, the front surface of the outer shell and the positions corresponding to the fixed rod and the internal thread column are respectively provided with a positioning groove and a positioning hole, the fixed rod is inserted in the positioning groove, and the internal thread column is inserted in the positioning hole and fixed with the outer shell through a second screw.

Through the design of the technical scheme, the metal mesh enclosure can be stably inserted into the outer shell in the front direction and can be fixed through the second screw, and workers can conveniently disassemble and assemble the metal mesh enclosure.

As a further improvement of the utility model, a T-shaped hole is formed in the center of the front surface of the fan blade mounting seat, a second threaded hole is formed in the center of the T-shaped hole, and a first screw used for being fixed with the connector is connected to the inner thread of the second threaded hole.

Through the design of the technical scheme, the fan blade mounting seat is convenient for workers to disassemble and assemble, and convenience is provided for cleaning the fan blade mounting seat.

As a further improvement of the utility model, a sealing plug is movably inserted in the T-shaped hole, and the shape and structure of the sealing plug are matched with those of the T-shaped hole.

Through the design of the technical scheme, the T-shaped hole can be sealed.

As a further improvement of the utility model, the front surface of the outer shell and positions close to four corners are provided with first threaded holes.

Through the design of the technical scheme, the outer shell is convenient for workers to be connected with the equipment.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the fan blade mounting seat, the connecting sleeve is arranged on the output shaft of the driving motor and matched with the connecting sleeve arranged on the fan blade mounting seat, so that the connecting sleeve can be fixedly inserted at the top of the connecting sleeve, and the fan blade mounting seat can be fixed with the connecting sleeve on the output end of the motor through the first screw through the countersunk hole and the second threaded hole arranged at the top of the connecting sleeve, so that a worker can conveniently detach the fan blade mounting seat, convenience is provided for cleaning fan blades, and the problems of dust splashing and low efficiency in the traditional cleaning process are solved.

2. According to the utility model, through the fixing rod and the internal thread column arranged on the metal mesh enclosure and the matching of the positioning groove and the positioning hole arranged on the outer shell, workers can disassemble and assemble the metal mesh enclosure through the second screw, so that the aim of quick disassembly and assembly can be achieved while the fan blades and the driving motor are protected, and the normal operation of cleaning work is not delayed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

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

FIG. 2 is a schematic view of a rear elevation view of the driving motor and the fan blade mounting base of the present invention;

FIG. 3 is a schematic view of the back structure of the outer casing of the present invention;

FIG. 4 is a schematic view of a rear-view cross-section of the driving motor and fan blade assembly of the present invention;

FIG. 5 is a schematic view of the front structure of the metal mesh enclosure of the present invention;

FIG. 6 is a schematic bottom sectional view of the metal mesh enclosure of the present invention;

FIG. 7 is a front view of the fan blade mounting base of the present invention.

In the figure: 1. an outer housing; 2. a first threaded hole; 3. a motor mounting seat; 4. a connecting rod; 5. a drive motor; 6. a connector; 7. a fan blade mounting base; 8. a fan blade; 9. a connecting sleeve; 10. a T-shaped hole; 11. a second threaded hole; 12. a first screw; 13. a sealing plug; 14. a metal mesh enclosure; 15. fixing the rod; 16. an internally threaded post; 17. a second screw; 18. positioning a groove; 19. and (7) positioning the holes.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the various embodiments of the utility model. It should be understood, however, that these physical details should not be construed as limiting the utility model. That is, in some embodiments of the utility model, such physical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1-7, the speed-adjusting fan structure based on the PWM control mode of the present invention includes an outer casing 1, a motor mounting seat 3, a fan blade mounting seat 7 and a metal mesh 14, wherein a driving motor 5 is installed inside the motor mounting seat 3, four connecting rods 4 are fixedly connected to the back of the motor mounting seat 3 at equal intervals in a circular manner with the center of the motor mounting seat 3 as an origin, the four connecting rods 4 are respectively and fixedly connected to the back of the outer casing 1 at positions near four corners, the motor mounting seat 3 is located at the center of the outer casing 1, the output end of the driving motor 5 is fixedly connected to a connector 6, a connecting sleeve 9 is fixedly connected to the middle of the fan blade mounting seat 7, the connecting sleeve 9 is detachably and fixedly connected to the top of the connector 6, and fan blades 8 are fixedly connected to the edge of the fan blade mounting seat 7 at equal intervals with the center of the fan blade mounting seat 7 as an origin, the metal mesh enclosure 14 can be dismantled and peg graft in the front of shell body 1, and the device makes things convenient for the staff to dismantle flabellum mount pad 7, provides convenience for clearance fan leaf 8, solves traditional clearance in-process dust and spatters, the problem of inefficiency everywhere.

Referring to fig. 1, 2 and 5, four fixing rods 15 are integrally formed at the edge of the metal mesh enclosure 14 at equal intervals in a ring shape with the center of the metal mesh enclosure 14 as an original point, an internal threaded column 16 is fixedly connected to one side of the fixing rod 15 away from the center of the metal mesh enclosure 14, a positioning groove 18 and a positioning hole 19 are respectively formed in the front surface of the outer shell 1 and at positions corresponding to the fixing rod 15 and the internal threaded column 16, the fixing rods 15 are inserted into the positioning grooves 18, the internal threaded column 16 is inserted into the positioning hole 19 and fixed to the outer shell 1 through a second screw 17, so that the metal mesh enclosure 14 can be stably inserted into the front surface of the outer shell 1 and can be fixed through the second screw 17, and a worker can conveniently disassemble and assemble the metal mesh enclosure 14.

Referring to fig. 4, a T-shaped hole 10 is formed in the center of the front surface of the fan blade mounting seat 7, a second threaded hole 11 is formed in the center of the T-shaped hole 10, a first screw 12 for fixing with the connector 6 is connected to the inner thread of the second threaded hole 11, so that workers can conveniently disassemble and assemble the fan blade mounting seat 7, convenience is provided for cleaning the fan blade mounting seat 7, a sealing plug 13 is movably inserted into the T-shaped hole 10, and the shape and structure of the sealing plug 13 are matched with the shape and structure of the T-shaped hole 10, so that the T-shaped hole 10 can be sealed.

Referring to fig. 1, the front surface of the outer shell 1 and the positions near the four corners are all provided with first threaded holes 2, which is convenient for the worker to connect the outer shell 1 with the equipment.

Cleaning: the worker firstly screws out the second screw 17 in the internal threaded column 16, then pulls out the metal mesh enclosure 14, pulls out the sealing plug 13 on the fan blade mounting seat 7, and then screws out the first screw 12 in the T-shaped hole 10, so that the fan blade mounting seat 7 can be detached from the driving motor 5 for cleaning.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a speed governing fan structure based on PWM control mode, includes shell body (1), motor mount pad (3), flabellum mount pad (7) and metal mesh enclosure (14), its characterized in that: a driving motor (5) is installed inside the motor installation seat (3), four connecting rods (4) are fixedly connected to the back of the motor installation seat (3) at equal intervals in an annular mode by taking the center of the motor installation seat (3) as an original point, the four connecting rods (4) are respectively and fixedly connected to the back of the outer shell (1) and are close to the positions of four corners, and the motor installation seat (3) is located at the center of the outer shell (1);

the fan blade mounting structure is characterized in that the output end of the driving motor (5) is fixedly connected with a connector (6), the middle part of the fan blade mounting seat (7) is fixedly connected with a connecting sleeve (9), the connecting sleeve (9) can be detachably and fixedly connected to the top of the connector (6), and the edge of the fan blade mounting seat (7) is annularly and fixedly connected with fan blades (8) at equal intervals by taking the center of the fan blade mounting seat (7) as an original point;

the metal mesh enclosure (14) is detachably inserted in the front of the outer shell (1).

2. A speed-adjustable fan structure based on PWM control mode according to claim 1, characterized in that: the edge of the metal mesh enclosure (14) is annularly and equidistantly integrally formed with four fixing rods (15) by taking the center of the metal mesh enclosure (14) as an original point, and one side of each fixing rod (15) far away from the center of the metal mesh enclosure (14) is fixedly connected with an internal threaded column (16).

3. A speed-adjustable fan structure based on PWM control mode according to claim 2, characterized in that: the positioning device is characterized in that a positioning groove (18) and a positioning hole (19) are respectively formed in the front face of the outer shell (1) and in positions corresponding to the fixing rod (15) and the internal thread column (16), the fixing rod (15) is inserted into the positioning groove (18), and the internal thread column (16) is inserted into the positioning hole (19) and fixed with the outer shell (1) through a second screw (17).

4. A speed-adjustable fan structure based on PWM control mode according to claim 1, characterized in that: t type hole (10) have been seted up to the positive central authorities of flabellum mount pad (7), second screw hole (11) have been seted up to the central authorities of T type hole (10), the internal thread of second screw hole (11) is connected with and is used for with first screw (12) that connector (6) are fixed.

5. The structure of claim 4, wherein the speed-adjustable fan is based on the PWM control mode, and comprises: a sealing plug (13) is movably inserted into the T-shaped hole (10), and the shape structure of the sealing plug (13) is matched with the shape structure of the T-shaped hole (10).

6. A speed-adjustable fan structure based on PWM control mode according to claim 1, characterized in that: the front surface of the outer shell (1) is provided with first threaded holes (2) at positions close to four corners.