CN113028714A

CN113028714A - Air door device

Info

Publication number: CN113028714A
Application number: CN201911356932.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-06-25
Also published as: WO2021129604A1

Abstract

The invention discloses an air door device, which comprises a driving gear, wherein the driving gear comprises a first sector gear and a circumferential flange part, the first sector gear comprises a first tooth part and a second tooth part, the first tooth part comprises a profile section and a first tooth profile section, the first tooth profile section is in smooth transition with the circumferential flange part through the profile section, the distance between the profile section and the circle center of the driving gear is gradually reduced along the direction towards the first sector gear, a tooth groove is formed between the first tooth part and the second tooth part, the second tooth part comprises a second tooth profile section, and at least part of the second tooth profile section and the first tooth profile section are symmetrically arranged relative to the central line of the tooth groove. When the air door is opened to needs, driven gear can take place the gyration under the effect of air door plant reaction force, and the elastic potential energy of storage is out of shape to the release door plant, because buffer portion reduces gradually to drive gear's centre of a circle interval, the elastic potential energy can constantly release, until releasing completely, reduces the air door plant and promotes the gear reversal, eliminates the unusual noise that produces when opening the air door.

Description

Air door device

Technical Field

The invention relates to the technical field of freezing and refrigeration, in particular to an air door device.

Background

The refrigerator is provided with an air door for controlling the opening and closing of the air duct, the air door is driven by a driving device to be opened and closed, the driving device comprises a driving gear and a driven gear, a gear shaft of the driven gear is connected with the air door, and the driven gear rotates under the driving of the driving gear to drive the air door to be opened and closed.

As shown in fig. 1, fig. 1 is a schematic view of the engagement of the driving gear and the driven gear in a state where the corresponding damper is about to be opened.

At this time, the damper needs to press the sealing edge correspondingly arranged to achieve sealing, the damper door panel receives a reverse acting force applied thereto by the sealing edge and transmits the reverse acting force to the driven gear 69 connected to the damper, the gear teeth 694f of the driven gear 69 press the arc-shaped outer peripheral part 682a of the driving gear 68, when the damper is opened, the pressing force applied to the gear teeth 694f by the arc-shaped outer peripheral part 682a is removed at the moment when the gear set is engaged, and the driven gear 69 is likely to rotate instantaneously and collide with the driving gear 68 under the above-mentioned reverse acting force, thereby generating noise.

Disclosure of Invention

The invention provides an air door device, which can relatively improve action noise.

The invention provides a refrigerator and a driving device of a damper thereof, which can relatively improve action noise.

The driving device of the air door comprises a driving gear, wherein the driving gear comprises a first sector gear and a circumferential flange portion, the first sector gear comprises a first tooth part and a second tooth part, the first tooth part is connected with the circumferential flange portion, the first tooth part comprises a profile section and a first tooth profile section, the first tooth profile section forms smooth transition with the circumferential flange portion through the profile section, the distance between the profile section and the center of the circle gradually decreases along the direction towards the first sector gear, the first tooth part and the second tooth part are provided with a tooth groove, the second tooth part comprises a second tooth profile section, and at least part of the second tooth profile section is symmetrically arranged with the first tooth profile section relative to the central axis of the tooth groove.

The air door device provided by the invention can relatively improve the action noise of the air door through the optimized design of the gear structure.

Drawings

FIG. 1 is a schematic view of the engagement of a drive gear and a driven gear in a condition immediately prior to opening of a corresponding damper;

FIG. 2 is a schematic structural diagram of an embodiment of a damper and a driving device thereof according to the present invention;

FIG. 3 is a schematic view of the housing of FIG. 2 after opening;

FIG. 4 is a schematic enlarged view of a portion I of FIG. 3;

FIG. 5 is a schematic view of the first drive gear of FIG. 4;

FIG. 6 is a bottom view of FIG. 5;

FIG. 7 is a schematic structural view of the second drive gear of FIG. 4;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is a schematic view of the second drive gear and second driven gear of FIG. 3 engaged with the second damper in a closed position;

FIG. 10 is an enlarged partial view of the V portion of FIG. 9;

FIG. 11 is an enlarged view of portion III of FIG. 8;

FIG. 12 is a schematic view of the first drive gear and the first driven gear of FIG. 3 engaged with the second damper in a closed position;

FIG. 13 is an enlarged partial view of the area IV in FIG. 12;

fig. 14 is an enlarged view of the portion II in fig. 6.

The reference numerals in fig. 1 are explained as follows:

68 drive gear, 682a circular arc shaped outer periphery, 682f gear, 69 driven gear, 694f gear;

the reference numerals in fig. 2-14 are illustrated as follows:

100 cases, 200 first gantries, 300 second gantries, 400 second dampers, 500 first dampers;

1a first driving gear, 11 a first sector gear, 111 a first gear, 112 a second gear, 113 a second gear, 11' tooth space, 12 circumferential flange part, 13 circular gear, 14 interference part and 1a buffer part;

2 first driven gear, 211 outer gear teeth, 212 fourth gear, 213 notch part;

3 second drive gear, 31 first sector gear, 311 first gear, 312 second gear, 313 second gear, 31' tooth slot, 32 circumferential flange portion, 33 abutment boss, 3a buffer portion, 3a1 flange connection segment, 3a2 profile segment, 3a3 first tooth profile segment; 313 second tooth, 313a second profile section;

4 second driven gear, 411 outer gear teeth, 412 fourth gear, 413 notch portion.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 2-4, fig. 2 is a schematic structural diagram of an embodiment of a damper and a driving device thereof according to the present invention; FIG. 3 is a schematic view of the housing of FIG. 2 after opening; fig. 4 is a partially enlarged view of the portion I in fig. 3.

The driving apparatus includes a housing 100, and a driving gear and a driven gear are provided in the housing 100. In the present embodiment, the driving apparatus is used to drive the double dampers, i.e., the first damper 500 and the second damper 400 shown in fig. 2, which are mounted on the first gantry 200 and the second gantry 300, respectively, with the casing 100 of the driving apparatus interposed therebetween. At this time, the driving means includes two sets of driving gears and driven gears, and here, the driving parts driving the first damper 500 are defined as a first driving gear 1, a first driven gear 2, and the driving parts driving the second damper 400 are defined as a second driving gear 3 and a second driven gear 4.

Referring to fig. 5 and 6 again, fig. 5 is a schematic structural view of the first driving gear 1 in fig. 4; fig. 6 is a bottom view of fig. 5.

The first driving gear 1 includes a circular gear 13, a first sector gear 11 (i.e. a plurality of driving teeth are distributed in a sector shape) located below the circular gear 13, a column portion, and a circumferential flange portion 12, wherein the circumferential flange portion 12 is formed by the column portion protruding to the outer periphery, the first sector gear 11 and the circumferential flange portion 12 are circumferentially connected to form a complete circle by abutting-surrounding connection, the circumferential flange portion 12 and the first sector gear 11 both circumferentially protrude from the column portion, and both ends of the circumferential flange portion 12 are connected to outer teeth of the first sector gear 11, i.e. a first tooth member, which may be a first gear tooth 111 and a second gear tooth 112 shown in fig. 6. The height of the circumferential flange portion 12 is smaller than the height of the first sector gear 11, and the first gear is integrally formed with the circumferential flange portion. In addition, the first sector gear 11 further includes a second tooth member 113, and the second tooth member 113 is adjacent to the first tooth member, with a tooth slot 11' formed therebetween.

As shown in fig. 4, a driving source is further disposed in the housing, in this embodiment, the driving source specifically includes a pinion, the pinion is engaged with the circular gear 13 of the first driving gear 1, so as to drive the first driving gear 1 to rotate, the first sector gear 11 of the first driving gear 1 is engaged with the second sector gear of the first driven gear 2, so as to drive the first driven gear 2 to rotate, and the output rotating shaft of the first driven gear 2 is connected to the first air door 500, so as to drive the first air door 500 to open and close.

With continued reference to fig. 7 and 8, fig. 7 is a schematic structural view of the second driving gear 3 in fig. 4; fig. 8 is a top view of fig. 7.

The second drive gear 3 also comprises a cylindrical portion, a first sector gear 31 and a circumferential flange portion 32, the first sector gear 31 and the circumferential flange portion 32 being circumferentially joined to form a complete circle around the circumference, the first sector gear 31 also having a first tooth member, which may be a first tooth 311 and a second tooth 312, located on the outside, the first tooth member being integrally formed with the circumferential flange portion 32. In addition, the first sector gear 11 further includes a second tooth member 113, and the second tooth member 113 is adjacent to the first tooth member, with a tooth slot 11' formed therebetween. The second drive gear 3 is also provided with a resisted boss 33.

Combine fig. 5, first drive gear 1 still includes conflict portion 14, is located the below of its first sector gear 11, and after first drive gear 1 rotated certain angle, conflict portion 14 can offset with receiving to boss 33 to drive second drive gear 3 and rotate, second drive gear 3 also is equipped with first sector gear 31, meshes with second driven gear 4 mutually, then drives second driven gear 4 and rotates, and second air door 400 is connected in the output pivot of second driven gear 4, opens and close with control second air door 400.

In order to avoid the mutual interference when the two dampers are driven, as shown in fig. 4, the first driven gear 2 and the second driven gear 4 are respectively provided with a fourth tooth 212, a fourth tooth 412, a notch portion 213, a notch portion 413, the fourth tooth 212 and the notch portion 213 are vertically arranged, the fourth tooth 412 and the notch portion 413 are vertically arranged, when the first sector gear 11 of the first driving gear 1 is meshed with the second sector gear of the first driven gear 2 to drive the first damper 500 to be opened or closed, the first tooth 111 continues to rotate, the circumferential flange portion 12 of the first driving gear 1 is vertically clamped with the fourth tooth 212, the first driven gear 2 does not follow up, and at the moment, the interference portion 14 is interfered by the interference boss 33 to drive the second driving gear 3 to rotate. The second driven gearwheel 4 is also provided with a fourth gear element 412 on the same principle,

with continued reference to fig. 9 and 10, fig. 9 is a schematic view of the second driving gear 3 and the second driven gear 4 in fig. 3 engaged with each other, wherein the second damper 400 is in a closed state; fig. 10 is a partially enlarged view of the V portion in fig. 9.

When the second damper 400 is closed, the sector gear 31 of the second drive gear 3 and the second sector gear of the second driven gear 4 are disengaged. In order to ensure the sealing, the second damper 400 is pressed against the corresponding second door frame 300 to compress the sealing edge, and the second damper 400 is subjected to the reverse force applied thereto by the sealing edge and is transmitted to the second driven gear 4 connected to the second damper 400. The second driven gear 4 has a tooth end of the third tooth member (specifically, the tooth 411 shown in fig. 10) abutting against the outer peripheral wall of the sector-shaped column portion 32 of the second driving gear 3 (the portion of the circumferential flange portion 32 can be engaged with the fourth tooth member 412), and the abutting tooth 411 is spaced from the first tooth 111 of the second sector gear 31 of the second driving gear 3.

Referring to fig. 11, fig. 11 is an enlarged schematic view of a portion III in fig. 8.

In the present embodiment, the buffer portion 3a is formed at the contact position between the circumferential flange portion 32 of the second drive gear 3 and the first tooth member 311 of the second drive gear 3, and the first tooth 311 is an outer tooth on the closing side, that is, an outermost drive tooth corresponding to the rotation direction of the second drive gear 3 when the second damper 400 is closed, and correspondingly, the second tooth 312 is an outer tooth on the opening side of the second drive gear 3 corresponding to an outermost drive tooth corresponding to the rotation direction of the second drive gear 3 when the second damper 400 is opened. When the second damper 400 is opened from the closed position, the second driven gear 4 passes through the buffer portion 3a and then engages with the second drive gear 3.

As can be seen from fig. 11, in the present embodiment, the first gear tooth 311 of the first sector gear 31 includes a profile section 3a2 and a first tooth profile section 3a3, the profile section 3a2 smoothly transitions with the circumferential flange portion 32, wherein a section of the circumferential flange portion 32 that meets the first profile section 3a2 is defined as a flange-meeting section 3a1, and the flange-meeting section 3a1, the profile section 3a2, and the tooth profile section 3a3 may be defined as a buffer portion 3 a. The sector gear 31 is engaged with the sector gear of the second driven gear 4 by the first profile section 3a2 abutting against and passing by the tooth end of the tooth of the driven gear 4, and the distance of the first profile section 3a2 from the center of the driving gear 3 is gradually reduced in the direction toward the first sector gear 31. That is, the circumferential flange portion 32 of the second drive gear 3 is reduced in diameter at the position where it contacts the first tooth element (first gear teeth 311 in the drawing), and the first contour segment 3a2 is formed by cutting the tooth crest of the first tooth element. Furthermore, the first tooth element forms a tooth slot from the second tooth element 313, the second tooth element 313 comprises a second tooth profile section 313a, and at least part of the second tooth profile section 313a is arranged symmetrically to the first tooth profile section 3a3 with respect to the center line of the tooth slot 31'. Furthermore, at least part of the second profile section 313a preferably has the same curvature as the first profile section 3a 2.

With the arrangement, when the second air door 400 needs to be opened, the second driving gear 3 rotates, after the second driving gear 3 rotates by a certain angle, the second driving gear 3 is meshed with the second driven gear 4, before the second driven gear 4 is meshed, the second driven gear 4 and the outer circumferential surface of the circumferential flange part 32 of the second driving gear 3 move relatively, the driven gear teeth of the second driven gear 4 still press the outer circumferential surface of the circumferential flange part 32 of the second driving gear 3, then the buffer part 3a of the second driving gear 3 rotates to be in contact with the third gear of the second sector gear of the second driven gear 4, and as the buffer part 3a is subjected to diameter reduction treatment, at this time, the second driven gear 4 can rotate under the action of the door panel reaction force of the second air door 400, so as to release the elastic potential energy stored in the deformation of the door panel of the second air door 400, and as the rotation continues, the elastic potential energy can be released continuously, until it is completely released.

The scheme is mainly to reduce the diameter of the outer circumferential surface of the contact position of the circumferential flange part 32 and the first gear teeth 311 so as to achieve the purpose of buffering and releasing elastic potential energy, the flange contact section 3a1 can form a longer path during diameter reduction, and the first profile section 3a2 is matched with the flange contact section 3a1 so as to ensure that the third tooth piece of the second driven gear 4 can cross the buffering part 3a and enter the tooth space of the first sector gear 31 for meshing. Therefore, the present solution can have enough stroke to completely release the elastic potential energy before the buffer part 3a is disengaged from the driven gear teeth of the second driven gear 4 by configuring the starting position and length of the buffer part 3 a.

With the continuous rotation of the second driving gear 3, the driven gear teeth of the second driven gear 4 are disengaged from the buffer part 3a, at this time, because the accumulated elastic potential energy is completely released, the second driven gear 4 is not subjected to the torque applied to the second air door 400 by the door panel, so that the second driven gear 4 is not subjected to the force any more, and the instantaneous high-speed rotation is generated, and further, the gear collision noise and the door panel vibration noise caused by the high-speed rotation are avoided.

The outer peripheral contour of the first contour segment 3a2 may have a linear, elliptical or arc-like configuration, preferably an arc-like configuration, so that the elastic potential energy is released more gradually. For the same purpose, the circumferential flange portion 32 may comprise a circular-arc-shaped outer peripheral wall, the first contour section 3a2 being substantially rounded in correspondence of the intersection with said outer peripheral wall, and the shape of the outer peripheral wall extending from the first contour section 3a2 towards said tooth profile section 3a3 being overall substantially rounded.

As shown in fig. 8, the first tooth element of the second driving gear 3, except for forming the first profile section 3a2, has the original tooth profile, i.e. the tooth profile is consistent with that of other driving teeth, and the meshing effect of the gears is not affected on the premise of achieving buffering and releasing elastic potential energy to reduce noise.

The buffer portion 3a is defined to have a start end located at the circumferential flange portion 32 of the second drive gear 3 and a tail end located at the first tooth of the second drive gear 3.

The above describes an example in which the buffer portion 3a is provided on the second drive gear 3, and it is understood that the first drive gear 1 may be provided with the buffer portion 1a for the same reason.

With continued reference to fig. 12-14, fig. 12 is a schematic view of the first drive gear 1 and the first driven gear 2 of fig. 3 engaged with the second damper 400 in a closed position; FIG. 13 is an enlarged partial view of the area IV in FIG. 12; fig. 14 is an enlarged view of the portion II in fig. 6.

When the first damper 500 is closed, the first sector gear 11 of the first drive gear 1 and the second sector gear of the first driven gear 2 are disengaged. In order to ensure the sealing, the first damper 500 is abutted against the corresponding first door frame 200 to compress the sealing edge, and the first damper 500 is subjected to the reverse force applied thereto by the sealing edge and is transmitted to the first driven gear 2 connected to the first damper 500. The third tooth member (specifically, the gear teeth 211 shown in fig. 13) of the first driven gear 2 abuts against the outer peripheral wall of the circumferential flange portion 12 of the first driving gear 1 (the portion of the circumferential flange portion 12 can be engaged with the third tooth member 212), and the abutting third tooth member is spaced from the first tooth member 111 of the first sector gear 11 of the first driving gear 1.

Likewise, the contact position of the circumferential flange part 12 of the first driving gear 1 and the first gear 111 forms a buffer part 1a, and the buffer part 1a also comprises a first profile section and a tooth profile section of the first gear 111 and a flange contact section smoothly transiting to the circumferential flange part 12. And the distance between the first profile section of the first driving gear 1 and the center of the first driving gear 1 gradually decreases along the direction towards the first sector gear 11, the first tooth part is formed with a tooth slot 11 'from the second tooth part 113, the second tooth part 113 comprises a second profile section, and at least part of the second profile section is symmetrically arranged with the first profile section relative to the center line of the tooth slot 11'. Furthermore, it is preferred that at least part of the second profile section has the same curvature as the first profile section.

When the first damper 500 is opened from the closed position, the first driven gear 2 passes through the buffer portion 1a and then engages with the first drive gear 1. Here, the first tooth member (first gear 111 in the drawing) of the first driving gear 1 is driving external teeth on the closing side, and the second outside driving teeth 112 are driving external teeth on the opening side, corresponding to outermost driving teeth in the rotation direction of the second driving gear 3 when the first damper 500 is closed and opened, respectively.

The principle is the same as the principle of the buffer part 3a provided with the second driving gear 3, when the first air door 500 needs to be opened, before the first driving gear 1 is meshed with the first driven gear 2, the driven gear teeth of the first driven gear 2 still press the outer circumferential surface of the fan-shaped column part 12 of the first driving gear 1, then the buffer part 1a of the first driving gear 1 rotates to be in contact with the driven gear teeth of the first driven gear 2, at the moment, the first air door 500 rotates under the reaction force, the elastic potential energy stored in the deformation of the door panel of the first air door 500 is released, and along with the continuous rotation, the elastic potential energy can be continuously released until the elastic potential energy is completely released. By configuring the starting position and length of the buffer portion 1a, the elastic potential energy can be completely released before the buffer portion 1a is disengaged from the driven gear teeth of the first driven gear 2. And the gear collision noise and the door panel vibration noise caused by high-speed rotation can be avoided.

The first contour segment of the first drive gear 1 can likewise have a linear, elliptical or circular-arc-shaped configuration, preferably circular-arc-shaped. For the same purpose, the peripheral flange portion 12 may comprise a circular-arc-shaped peripheral wall, the first contour segment being substantially rounded in correspondence with the intersection with said peripheral wall, and the shape of the peripheral wall extending from the first contour segment towards said profile segment being substantially rounded in its entirety.

As shown in fig. 6, the first gear tooth 111 of the first driving gear 1, except for forming the profile section, has the original profile, that is, the profile is consistent with the profile of other driving teeth, and the meshing effect of the gears is not affected on the premise of achieving buffering and releasing elastic potential energy to reduce noise.

The above embodiment describes that the first driving gear 1 and the second driving gear 3 are both provided with a diameter reduction at the contact position of the first gear member and the

circumferential flange portions

12 and 32 on the closing side, and the outer driving gear on the closing side corresponds to the position tightly contacted with the driven gear when the air door is closed, so as to achieve the noise reduction effect. It is understood that, corresponding to the position of the damper when the damper is opened, when the driven gear is also subjected to the force of the damper when the damper is opened, the positions where the first teeth (second teeth 112, 312) on the other side of the driving gear and the

circumferential flange portions

12, 32 meet may also be reduced in diameter to form the buffer portions.

In addition, the driving device in the embodiment of the scheme is used for driving the two air doors, and the specific structures of the corresponding driving gear and the corresponding driven gear are specifically explained, so that the main principle of the embodiment of the scheme is that the buffer parts 1a and 3a are formed by reducing the diameter of the positions, which are to be meshed, of the driving gear, so that the elastic potential energy of the air doors is released and then meshed, the number of the air doors is not limited in the scheme, and correspondingly, the driving device is not limited to be provided with two sets of driving gears and two sets of driven gears, for example, only one set of driving gear and one set.

Besides the driving device of the air door, the embodiment of the invention also provides a refrigerator, wherein the air duct of the refrigerator is provided with the air door, the refrigerator is also provided with a driving device for driving the air door to act to adjust the opening, and the driving device is the driving device described in any embodiment.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a damper device, its characterized in that, includes drive gear, drive gear includes first sector gear and circumference flange portion, first sector gear includes first tooth spare and second tooth spare, first tooth spare with circumference flange portion integrated into one piece, first tooth spare includes profile section and first profile section, first profile section passes through profile section with circumference flange portion smooth transition, profile section with the distance of the centre of a circle of drive gear is along the orientation first sector gear's direction reduces gradually, first tooth spare distance second tooth spare is formed with the tooth's socket, second tooth spare includes second profile section, at least part the second profile section is relative the central line of tooth's socket with first profile section forms the symmetry setting.

2. The damper device of claim 1, wherein the circumferential flange portion includes a generally arcuate outer peripheral wall, the shape extending from the outer peripheral wall toward the contour section and the first tooth profile section being generally rounded.

3. The damper apparatus of claim 1, wherein the contour of the contour segment is linear, elliptical, or arcuate in configuration.

4. The damper device according to any one of claims 1 to 3, further comprising a driven gear including a second sector gear including a third tooth member whose tooth end abuts against an outer peripheral wall of the circumferential flange portion, the driven gear further including a fourth tooth member and a notched portion located below the fourth tooth member, the circumferential flange portion being capable of being fitted into the notched portion.

5. The damper device according to any one of claim 4, wherein the drive gear rotates relative to the driven gear, and the outer peripheral wall of the circumferential flange portion rotates clockwise against the tooth end of the third tooth member and gradually disengages from the notched portion, and then is abutted by the contour portion and passes over the tooth end of the third tooth member, so that the first sector gear meshes with the second sector gear.

6. The damper apparatus of claim 1, wherein at least a portion of the second profile section has the same curvature as the first profile section.

7. The damper assembly of claim 1, wherein the first tooth is located on an open door side of the damper assembly or the first tooth is located on a closed door side of the damper assembly.