CN113028715A

CN113028715A - Air door device

Info

Publication number: CN113028715A
Application number: CN201911359584.0A
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

Abstract

The invention discloses an air door device, which comprises a shell, wherein a first driving gear, a second driving gear and a gear shaft of the second driving gear are arranged in the shell, and an isolating shaft is also arranged in the shell, the isolating shaft is provided with a shaft body and a base, the base axially isolates the first driving gear and the second driving gear, and one shaft end of the shaft body is inserted into a positioning hole of the gear shaft for positioning; an annular groove is formed between one end, facing the first driving gear, of the inner wall of the gear hole of the second driving gear and the gear shaft; the isolation shaft is further provided with a petal which is circumferentially positioned relative to the shaft body and can be inserted into the annular groove, the petal is in interference fit with the inner wall of the gear hole, and the inner diameter of the petal is larger than that of the annular groove. After the second driving gear, the gear shaft and the isolation shaft are assembled, the upper section of the inner wall of the gear hole of the second driving gear can compress the flap and enable the flap to be elastically deformed, the isolation shaft is inserted into the positioning hole to be circumferentially positioned, and the flap can apply damping for stopping rotation to the second driving gear to prevent the second driving gear from being follow-up with the first driving gear.

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, and for the double-air-door structure, the driving device for driving the air door to act comprises two sets of driving gears and driven gears which respectively drive the corresponding door plates to act. The specific process is as follows:

and the gear shafts of the first driven gear and the second driven gear are respectively connected with a door plate. The driving device is provided with a pinion, the pinion drives the first driving gear to rotate, and the first driving gear drives the second driving gear to rotate so as to drive a door panel to move; after the first driving gear rotates a certain position, the abutting part of the first driving gear can abut against the abutting boss of the second driving gear, and the second driving gear drives the second driven gear to rotate after rotating, so that the door plate of another air door is driven to move.

The opening and closing of the two air doors are independent, and the first driving gear drives the second driving gear to rotate when rotating to a preset position. The two driving gears are affected by the machining tolerance or friction of parts and other external factors, and the hidden trouble that the two driving gears follow up may exist.

In view of this, an urgent technical problem to be solved by those skilled in the art is how to design an air door device, which can reduce the following hidden trouble of two driving gears during actuation.

Disclosure of Invention

The invention provides an air door device, which comprises a shell, wherein a first driving gear, a second driving gear and a gear shaft of the second driving gear are arranged in the shell, an isolating shaft is also arranged in the shell, the isolating shaft is provided with a shaft body and a base, the base axially isolates the first driving gear from the second driving gear, and one shaft end of the shaft body is inserted into a positioning hole of the gear shaft for positioning;

an annular groove is formed between one end, facing the first driving gear, of the inner wall of the gear hole of the second driving gear and the gear shaft; it is relative still to separate the axle body circumference location and can insert the lamella in the annular groove, the lamella with gear hole inner wall interference fit, the internal diameter of lamella is greater than the internal diameter of annular groove.

According to the air door device provided by the invention, the annular groove is formed between the inner wall of the gear hole of the second driving gear and the peripheral wall of the gear shaft, the isolating shaft is provided with the inserting part, the inserting part is matched with the annular groove, and the inserting part and the inner wall of the gear hole form interference fit, so that the isolating shaft can not rotate at least along the circumferential direction, the inserting part can exert a damping effect on the second driving gear during actuation, and the hidden trouble that the two driving gears follow up during actuation can be reduced.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a damper assembly according to the present invention;

FIG. 2 is a schematic view of the housing of FIG. 1 after opening;

FIG. 3 is an enlarged view of a portion of FIG. 2 at point I;

FIG. 4 is a schematic view of the first drive gear of FIG. 3;

FIG. 5 is a top plan view of the second drive gear and second driven gear of FIG. 3 in mating relationship;

FIG. 6 is a schematic view of FIG. 1 taken along the axis of the first drive gear with the housing open;

FIG. 7 is an enlarged view of portion II of FIG. 6;

FIG. 8 is a schematic view of the housing of FIG. 1 with the first drive gear and the first driven gear removed and with the second drive gear primarily shown;

FIG. 9 is an enlarged view of portion III of FIG. 8;

FIG. 10 is a perspective view of the septum of FIG. 7;

FIG. 11 is a cross-sectional view of FIG. 1 taken axially along the first drive gear;

FIG. 12 is an enlarged view of the area IV in FIG. 11;

fig. 13 is a bottom view of fig. 10.

The reference numerals in fig. 1-13 are illustrated as follows:

100 cases, 200 first gantries, 300 second gantries, 400 second dampers, 500 first dampers; 101, a second gear shaft, 101a positioning hole and 101b second step surface;

1a first driving gear, 11 sector tooth parts, 111 a first outer driving gear, 112 a second outer driving gear, 12 sector column parts, 13 circular gears and 14 collision parts;

2 first driven gear, 212 missing tooth part;

3a second driving gear, 31 fan-shaped tooth parts, 32 fan-shaped column parts, 321 fan-shaped bottom parts, 322 fan-shaped bulges, 33 abutted bosses and 3a first step surface;

4 second driven gear, 412 missing tooth portion;

5 a pinion gear;

6 separating the shaft, 61 gear shaft I, 62 positioning boss, 63 base, 64 matching part, 65 inserting part and 651 reinforcing rib;

a an annular groove.

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. 1-3, fig. 1 is a schematic structural diagram of an embodiment of a damper device according to the present invention; FIG. 2 is a schematic view of the housing of FIG. 1 after opening; fig. 3 is a partially enlarged view of the portion I in fig. 2.

The driving apparatus of the damper 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. 1, 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. 4 and 5 again, fig. 4 is a schematic structural view of the first driving gear 1 in fig. 3; fig. 5 is a top view of the second drive gear and second driven gear of fig. 3 mated.

The first driving gear 1 comprises a circular gear 13, a sector-shaped tooth part 11 (namely, a plurality of driving teeth are distributed in a sector shape) and a sector-shaped column part 12, wherein the sector-shaped tooth part 11 is circumferentially connected with the sector-shaped column part 12 to form a complete circle by butt-encircling, and two ends of the sector-shaped column part 12 are connected with two outer driving teeth of the sector-shaped tooth part 11. The height of the sector-shaped column portion 12 is smaller than the height of the sector-shaped tooth portion 11.

As shown in fig. 3, a driving source is further disposed in the housing, in this embodiment, the driving source specifically includes a pinion 5, the pinion 5 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 sector-shaped tooth portion 11 of the first driving gear 1 is engaged with the sector-shaped tooth portion 11 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.

The second drive gear 3 also includes a sector-shaped tooth portion 31 and a sector-shaped pillar portion 32 that are circumferentially contiguous so as to be in a complete circular shape in abutting engagement. The second drive gear 3 is also provided with a resisted boss 33.

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

In order to avoid the mutual interference when the two air doors are driven, as shown in fig. 3, the first driven gear 2 and the second driven gear 4 are respectively provided with a tooth missing part 212 and a tooth missing part 412, when the sector tooth part 11 of the first driving gear 1 is meshed with the sector tooth part of the first driven gear 2 to drive the first air door 500 to be opened or closed, the first driving gear 1 continues to rotate, the sector column part 12 of the first driving gear 1 is vertically clamped with the tooth missing part 212, the first driven gear 2 does not follow up, and at this time, the abutting part 14 abuts against the boss 33 to drive the second driving gear 3 to rotate. The second driven gear 4 is also provided with a tooth-missing portion 412 based on the same principle,

in addition, referring to fig. 6-10, fig. 6 is a schematic view of fig. 1 taken along the axial direction of the first driving gear 1, and the housing 100 is opened; FIG. 7 is an enlarged view of portion II of FIG. 6; fig. 8 is a schematic view of the housing 100 of fig. 1 with the first driving gear 1 and the first driven gear 2 removed, and mainly illustrating the second driving gear 3; FIG. 9 is an enlarged view of portion III of FIG. 8; fig. 10 is a perspective view of septum 6 of fig. 7.

In order to prevent the second driving gear 3 from rotating due to friction of the first driving gear 1 when the collision part of the first driving gear 1 does not collide with the supported boss of the second driving gear 3, a separation shaft 6 is further provided to axially separate the first driving gear 1 from the second driving gear 3. The isolation shaft 6 includes a shaft body and a base 63, the base 63 serving as axial isolation.

In this embodiment, the housing is provided with a gear shaft of the second driving gear 3, the second driving wheel 3 is sleeved on the gear shaft, which is correspondingly defined as a second gear shaft 101, a blind hole facing the first driving gear 1 is formed in the middle of the second gear shaft 101, and is used as a positioning hole 101a for separating the shaft 6, one shaft end of the shaft body of the separating shaft 6 can be inserted into the positioning hole 101a for positioning, the shaft body can have a longer length, and the other shaft end can be inserted into the gear hole of the first driving gear 1 to be used as a gear shaft of the first driving gear 1, as shown in fig. 10, the longer shaft section at the upper end of the separating shaft 6 is defined as a first gear shaft 61 of the first. It can be understood that the first gear shaft 61 may not be provided, and the gear shaft of the first driving gear 1 may be specially provided, in terms of the function of realizing the axial isolation.

As shown in fig. 7 and 9, one end of the second driving gear 3 is engaged with the outer periphery of the second gear shaft 101 and rotates around the second gear shaft 101, and an annular groove a is formed between the other end (upper end in fig. 7) of the second driving gear 3 and the second gear shaft 101, that is, an annular groove a is formed between the inner wall of the gear hole of the second driving gear 3 and the peripheral wall of the second gear shaft 101. As shown in fig. 9, the second driving gear 3 includes a sector-shaped pillar portion 32 and a sector-shaped tooth portion 31, and the sector-shaped pillar portion 32 and the sector-shaped tooth portion 31 are butted to form a complete circle. The sector-shaped column portion 32 is stepped, the stepped bottom portion is a sector-shaped bottom portion 321 having an outer diameter equal to that of the sector-shaped tooth portion 32, and a sector-shaped protrusion 322 having an outer diameter smaller than that of the sector-shaped tooth portion 32, and an inner wall of the sector-shaped protrusion 322 is an upper section of an inner wall of the gear hole of the second drive gear 3. An annular groove a is formed between the upper section of the inner wall of the gear hole and the second gear shaft 101.

As shown in fig. 11 and 12 in particular, fig. 11 is a sectional view taken along the axial direction of the first drive gear 1 in fig. 1; fig. 12 is an enlarged view of the area IV in fig. 11.

A fan-shaped protrusion 322 of the upper end of the second driving gear 3, an inner wall of which forms a first step surface 3a located at the inner side; the second gear shaft 101 has an outer periphery formed with a second step surface 101b located outside thereof such that the annular recess a is formed between the upper end of the second drive gear 3 and the peripheral wall of the second gear shaft 101, and the bottom of the annular recess a, i.e., the first step surface 3a and the second step surface 101b, are formed in abutment.

As shown in fig. 10, the isolation shaft 6 is provided with a base 63 located on the base 63, the base 63 and the shaft are integrally arranged, the upper part of the shaft is above the base 63, the first gear shaft 61 of the first driving gear 1 is formed, the lower part of the shaft is below the base 63, the positioning boss 62 is formed, and the positioning boss 62 is inserted into the positioning hole 101a of the second gear shaft 101 to position the isolation shaft 6. The isolation shaft 6 is further provided with an insertion portion 65, the insertion portion 65 is matched with the annular groove a, and the insertion portion 65 and the inner wall of the gear hole form interference fit, so that the isolation shaft 6 cannot rotate at least along the circumferential direction.

Specifically, the inserting portion 65 is a petal, a plurality of petals are further arranged below the base 63, the plurality of petals are distributed around the positioning boss 62, and the plurality of petals are inserted into the annular groove a. To achieve an interference fit, the size of the flaps 65 is defined as follows:

the outer diameter of the flap 65 is larger than the outer diameter of the annular groove a, and the inner diameter of the flap 65 is larger than the inner diameter of the annular groove a.

That is, after the flap serving as the insertion portion 65 is inserted into the positioning groove, the flap will abut against the inner wall of the upper section of the gear hole of the second driving gear 3 and form an interference fit, and a certain gap is formed between the flap and the peripheral wall of the second gear shaft 101. The inner diameter of the annular groove a is the outer diameter of the upper end of the second gear shaft 101 (the portion above the first step surface 3a inside the fan-shaped protrusion 322), and the outer diameter of the annular groove a is the inner diameter of the upper end of the gear hole of the second drive gear 3.

Like this, second drive gear 3, gear shaft two 101, keep apart 6 assembly backs of axle, second drive gear 3's gear hole inner wall upper segment can compress the lamella and make it take place elastic deformation, keep circumferential direction location in establishing locating hole 101a through location boss 62 then to separate axle 6, thereby, when second drive gear 3 rotates, the lamella can exert a prevention pivoted damping to second drive gear 3, thereby play and prevent second drive gear 3 when receiving to the boss not yet contradict with conflict portion, follow-up with first drive gear 1 under the frictional force effect, of course, this damped size, can not hinder second drive gear 3 and rotate under the effect of conflict portion.

In this embodiment, the insertion portion 65 for preventing the second driving gear 3 from following is provided on the isolation shaft 6, so that the processing is simple, the insertion portion can be integrally formed with the isolation shaft 6, the manufacturing is simpler, and the assembly is convenient. With the continuous operation of the damper device, abrasion occurs between the insertion portion 65 and the second driving gear 3, and because the insertion portion 65 is in interference fit with the inner wall of the gear hole of the second driving gear 3, the insertion portion 65 has certain elasticity, so that the entire outer peripheral surface of the insertion portion 65 is not matched with the gear hole of the second driving gear 3, but only the part of the outer peripheral surface of the flap 65 close to the first gear shaft 61 is pressed against the inner wall of the gear hole of the second driving gear 3 in an oblique angle manner. Along with the increase of the abrasion, the pressing part gradually deviates towards one end far away from the first gear shaft 61, so that the uniform damping of the product can be maintained in the whole service life.

In order to facilitate the insertion portion 65 to be smoothly inserted into the annular groove a and to be interference-fitted with the gear hole inner wall of the second driving gear 3, a chamfer may be provided at an upper end of the gear hole inner wall of the second driving gear 3 to form a guide portion, and the guide insertion portion 65 is inserted into the annular groove a, as shown in fig. 9. For the same purpose, the end of the insertion portion 65 facing the bottom of the annular groove a may also be provided with a chamfer, as shown in fig. 10, and the bottom end of the insertion portion 65 is provided with a chamfer, so that the insertion portion can be conveniently inserted into the annular groove a to realize interference fit with the inner wall of the gear hole.

With continued reference to fig. 10 in conjunction with fig. 13, fig. 13 is a bottom view of fig. 10.

In addition to the flaps as the insertion portions 65, a plurality of fitting portions 64 are provided below the base 63 of the partition shaft 6, the plurality of fitting portions 64 are also provided around the positioning boss 62, and the fitting portions 64 may be provided concentrically with the flaps to form an annular structure having an opening. As shown in fig. 10, the fitting portion 64 and the flaps are circumferentially spaced apart, that is, a fitting portion 64 is disposed between two flaps. In the present embodiment, the fitting portion 64 is sized as follows:

the outer diameter of the matching part 64 is smaller than that of the annular groove a, the inner diameter of the matching part 64 is slightly larger than that of the second gear shaft 101, and the thickness of the matching part 64 is larger than that of the flap 65.

As described above, the first driving gear 1 drives the second driving gear 3 to rotate by the abutting boss abutting against the second driving gear 3 through the abutting portion, and the abutting portion and the abutting boss are disposed on one side of the corresponding driving gear, so that the acting mode is a single-side stress, and the second driving gear 3 may be deflected. The present embodiment further provides the fitting portion 64, and it is understood from fig. 11 that the gaps between the fitting portion 64 and the second gear shaft 101 and between the fitting portion 64 and the second drive gear 3 are both small, and when the second drive gear 3 deflects as described above, the maximum deformation amount of the lobe is the sum of the gaps between the fitting portion 64 and the second gear shaft 101 and between the lobe and the second drive gear 3, so as to protect the lobe, reduce the maximum deformation amount of the lobe, and avoid that when the second gear deflects, the lobe deformation amount is too large to recover or break.

In fact, the matching portion 64 can play a certain centering role, as shown in fig. 11, due to the arrangement of the annular groove a, the axial length of the second gear shaft 101 matched with the second driving gear 3 is reduced, and the arrangement of the matching portion 64 can stabilize the stability of the second driving gear 3 at the annular groove a, and maintain the smooth rotation of the second driving gear 3 without large deflection. Thus, the flaps require an interference fit to provide damping in the form of a relatively thin sheet, while the mating portion 64 is a relatively rigid structure having a thickness. Of course, when the height of the second gear shaft 101 and the second driving tooth engaging section is long enough, it is also possible not to provide the engaging portion 64. The inner diameter of the fitting portion 64 is preferably smaller than that of the annular groove a to avoid excessively increasing the rotational resistance of the second drive gear 3.

Since the petals are relatively thin, in order to avoid fracture of the petals from the root when the petals are deformed, a reinforcing rib 651 may be provided at the root of the petals, as shown in fig. 10 and 13.

It should be noted that, the lobe is in interference fit with the inner wall of the gear hole of the second driving gear 3, as long as the lobe can abut against the inner wall of the gear hole and cannot rotate, so the lobe is not limited to be disposed on the base 62, for example, the lobe may also be a lobe structure extending from the periphery of the positioning boss 62, that is, the lobe structure is integrally formed on the base 62 or the shaft body, and at this time, the fitting portion 64 may also be integrally formed on the base 62 or the shaft body separating the shaft 6.

It can be understood that, when lamella, base 63 integrated into one piece, base 63 need not be fixed with the axis body owing to play the isolation effect, so base 63 and lamella can set up with the axis body components of a whole that can function independently, as long as after the assembly with axis body circumference location can. For example, the base is equipped with the through-hole, the overcoat axis body, axis body periphery and base through-hole inner wall, and one is equipped with vertical protruding muscle, and the other is equipped with vertical slot, but then base and axis body circumference location after the assembly, perhaps through round pin axle location also can after the suit. Also, the fitting portion 64 at this time may be integrally formed with the base 63.

Besides the air door device, 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 move so as to adjust the opening, and the driving device is the driving device for the air door 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 air door device comprises a shell (100), a first driving gear (1), a second driving gear (3) and a gear shaft, wherein the first driving gear (1), the second driving gear (3) and the gear shaft are positioned in the shell (100), the air door device is characterized by further comprising an isolation shaft (6), the isolation shaft (6) is provided with a shaft body and a base (63), the first driving gear (1) is sleeved on the shaft body, the base (63) axially isolates the first driving gear (1) from the second driving gear (3), and one shaft end of the shaft body is inserted into a positioning hole (101a) of the gear shaft for positioning;

an annular groove (a) is formed between the inner wall of the gear hole of the second driving gear (3) and the peripheral wall of the gear shaft; separate axle (6) and still be equipped with inserted part (65), inserted part (65) with annular groove (a) looks adaptation just inserted part (65) with gear hole inner wall forms interference fit, so that separate axle (6) can't rotate along circumference at least.

2. The damper device according to claim 1, wherein the insertion portion (65) is a flap, the flap (65) has an inner diameter larger than an inner diameter of the annular groove (a), and a plurality of flaps are provided, the flaps (65) being annularly and uniformly arranged and correspondingly inserted into the annular groove (a).

3. The damper device according to claim 1, wherein the partition shaft (6) is further provided with an engaging portion (64) circumferentially positioned with respect to the shaft body, an outer diameter of the engaging portion (64) is smaller than an outer diameter of the annular groove (a), an inner diameter of the engaging portion (64) is slightly larger than a diameter of the gear shaft, and a thickness of the engaging portion (64) is larger than a thickness of the flap (65).

4. The damper device according to claim 3, wherein the flap (65) and the engagement portion (64) are provided in plural and are provided in the base (63), and the engagement portion (64) and the flap (65) are provided in sequence at intervals to form an annular structure having an opening which is a gap between the engagement portion (64) and the flap (65); the plurality of fitting portions (64) and the flaps (65) are each inserted into the annular groove (a).

5. The damper device according to claim 4, wherein the fitting portion (64) and the flaps (65) and the base (63) are integrally formed with the shaft body.

6. The damper drive arrangement according to claim 5, characterized in that the base of the flap (65) has a reinforcing rib (651).

7. The damper device according to claim 5, wherein the other shaft end of the shaft body is inserted into a gear hole of the first drive gear (1) as a gear shaft of the first drive gear (1).

8. The damper assembly of claim 4, wherein the engagement portion (64) is integrally formed with the flap (65) and the base (63), and wherein the base (63) surrounds the shaft and is circumferentially positioned with respect to the shaft.