CN220566525U - Anti-rotation gear mounting structure and contain its two air door air supply arrangement - Google Patents

Abstract

The utility model discloses an anti-rotation gear mounting structure and a double-air door air supply device comprising the same, wherein the double-air door air supply device comprises a gear shaft and a first driving gear; the outer peripheral surface of the first driving gear is provided with a first sector tooth and a first sliding matching part which are connected circumferentially, and the outer diameter of the first sliding matching part is slightly larger than the diameter of the top circle of the first sector tooth; the inner peripheral surface of the first driving gear is provided with a first shaft hole and a second shaft hole which are axially connected, the inner diameter of the first shaft hole is larger than that of the second shaft hole, one end of the second shaft hole, facing the first shaft hole, is connected with a plurality of clack bodies which are circumferentially arranged and are not connected with each other, and a gap is reserved between the clack bodies and the first shaft hole; the inner peripheral surface of each petal body is provided with a radial convex rib. According to the utility model, the convex ribs are arranged on the inner circumferential surface of each petal body, so that the convex ribs and the gear shaft have corresponding holding force, meanwhile, the petal bodies and the gear shaft have certain elastic force, and when the torque reaches a specified value, the first driving gear can still rotate around the gear shaft.

Description

Anti-rotation gear mounting structure and contain its two air door air supply arrangement

Technical Field

The utility model relates to the technical field of household appliances, in particular to an anti-rotation gear mounting structure and a double-air door air supply device comprising the same.

Background

At present, an intelligent refrigerator is used as a common household appliance, and the main function of the intelligent refrigerator is storage and fresh keeping. The variety of stored articles in each compartment varies, which results in different temperatures being required for each compartment. The cold air flowing into each compartment is typically dynamically regulated by a damper arrangement.

Two air doors are arranged in some refrigerating air channels and are used for conveying cold air to different storage spaces or adjusting the air quantity in the air channels by controlling the opening and closing states of the two air doors. In the prior art, each air door is controlled to be opened and closed by a motor, and the more the air doors are, the more the air door is, the problems of complex structure, high cost and the like of the air supply device are caused.

In the operation process of the double air doors, the transmission assembly of the first air door is directly meshed with the round gear of the driving motor, so that the condition that the air door is automatically rotated to be closed or opened cannot occur, the door plate of the second air door is driven to rotate by the transmission assembly of the first air door, the second air door is in an opened or closed state only by means of the locking effect of the transmission assembly of the second air door, and in actual operation, the second air door is always opened or closed in advance under the control of external force because of the weight of the door plate or the effect of cold air pressure, and therefore the noise condition of the whole air door and the integral failure of the air door can be influenced.

Patent number CN 207365539U discloses that the stability of the open or closed state of the damper can be achieved by the cooperation of two grooves on the protrusion and the gear shaft at the inner periphery of the gear, at this time, the protrusion can only be arranged one, the gear is easy to incline to one side in the rotating process, the noise of the product, and when the protrusion enters into the groove or climbs out from the groove, the noise of the product can be generated because of the sudden impact of the outside.

Therefore, it is necessary to design an air supply device with a simple structure, which does not generate abrupt force changes or damper noise.

Disclosure of Invention

In order to solve the technical problems that in the prior art, the second air door of the double-door air supply device is always opened or closed in advance under the control of external force due to the weight of a door plate or the action of cold air pressure, the noise condition of the whole air door is influenced, and the whole air door is invalid, the utility model provides an anti-rotation gear mounting structure and the double-air door air supply device comprising the same, and aims to solve the problems.

The utility model provides an anti-rotation gear mounting structure, which comprises a gear shaft fixedly arranged and a first driving gear assembled with the gear shaft; the outer peripheral surface of the first driving gear is provided with a first sector tooth and a first sliding matching part which are connected circumferentially, and the outer diameter of the first sliding matching part is slightly larger than the diameter of the top circle of the first sector tooth; the inner peripheral surface of the first driving gear is provided with a first shaft hole and a second shaft hole which are axially connected, the inner diameter of the first shaft hole is larger than that of the second shaft hole, one end of the second shaft hole, facing the first shaft hole, is connected with a plurality of clack bodies which are circumferentially arranged and are not connected with each other, and a gap is reserved between the clack bodies and the first shaft hole; the inner peripheral surface of each petal body is provided with a radial protruding rib, and when the torque received by the first driving gear is smaller than a specified value, the first driving gear can hug the gear shaft tightly.

Further, the petals extend axially. The convex ribs are arc-shaped bulges.

Further, the inner diameter of the valve body is 0.3 mm-0.4 mm larger than the inner diameter of the convex rib.

The utility model also provides a double-air door air supply device, which comprises an air door assembly, a driving piece, a first transmission assembly and a second transmission assembly: the two air door assemblies are provided with ventilation openings and baffles capable of opening or closing the ventilation openings; the driving piece provides a rotary driving force; the first transmission assembly comprises a second driving gear and one or more gears meshed with the second driving gear for transmission, the second driving gear is in transmission connection with the driving piece, and the final gear of the first transmission assembly is connected with one of the air door assemblies; the second transmission assembly comprises the anti-rotation gear mounting structure and one or more gears meshed with the first driving gear for transmission, the second driving gear is in running fit with the gear shaft, the first driving gear is driven to rotate by the second driving gear, and the final gear of the second transmission assembly is connected with the other air door assembly.

Further, the outer peripheral surface of the second driving gear is provided with a motor connecting section and a transmission assembly connecting section which are connected in an axial direction, and the motor connecting section is a circular gear meshed with the driving piece for transmission.

The transmission assembly connecting section comprises a second sector gear and a second sliding fit part which are circumferentially connected and in transmission fit with the next-stage gear, and the outer diameter of the second sliding fit part is slightly larger than the diameter of the top circle of the second sector gear.

Further, the axial length of the second sector tooth is greater than that of the second sliding fit portion; the outer peripheral surface of the first driving gear is provided with a sector sliding block connected with one end of the first sliding fit part, and the sector sliding block axially protrudes out of the first sector tooth; the portion of the second sector tooth protruding from the second sliding fit portion can be in contact with the circumferential side face of the sector slider.

Further, the first transmission assembly includes a third sector gear meshed with the second sector gear; the second drive assembly includes a fourth sector gear engaged with the first sector gear.

Further, the air door assembly further comprises a shell which is fixed with the air door assembly and used for installing the driving piece, the first transmission assembly and the second transmission assembly, and one end of the shell is open.

Further, a mounting hole for an output shaft to pass through and a plurality of limiting bosses for limiting the driving piece are arranged in the shell, and the gear shaft is fixed on the shell.

Further, two limit posts are further arranged in the shell, the first sliding fit part is provided with a protruding block protruding radially, the protruding block is located between the two limit posts, and when the protruding block is abutted to one of the limit posts, the fourth sector tooth is in contact with the surface of the first sliding fit part close to one side of the first sector tooth; when the lug is abutted with the other limit post, the fourth sector tooth is in surface contact with the first sliding fit part close to the other side of the first sector tooth.

The beneficial effects of the utility model are as follows:

(1) According to the anti-rotation gear mounting structure and the double-air-door air supply device comprising the same, the convex ribs are arranged on the inner circumferential surface of each petal body, so that the convex ribs and the gear shaft have corresponding holding force, noise condition of the whole air door and integral failure of the air door cannot be caused by too loose fit of the holes and the gear shaft, meanwhile, a plurality of petal bodies and the gear shaft have certain elastic force through interval arrangement among the petal bodies and separation arrangement of the outer sides of the petal bodies and the first shaft section, and when the torque reaches a specified value, the first driving gear can still rotate around the gear shaft.

(2) The utility model drives the air door component to rotate forwards and backwards through the driving piece, thereby realizing the purpose of opening and closing the baffle. The door opening angle of the baffle plate can be controlled by adjusting the frequency of the stepping motor. The driving piece is modularized, so that the overall manufacturing cost of the air door is reduced.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a perspective view of one side end face of a first drive gear in an anti-rotation gear mounting structure according to the present utility model;

FIG. 2 is a perspective view of the other side end face of the first drive gear of FIG. 1;

FIG. 3 is a perspective view of a dual damper blower according to the present utility model;

FIG. 4 is an exploded view of the dual damper air moving device of FIG. 3;

FIG. 5 is a perspective view of a second drive gear of the present utility model;

FIG. 6 is a perspective view of a second driven gear of the present utility model;

FIG. 7 is a perspective view of a first driven gear of the present utility model;

FIG. 8 is a schematic diagram of the assembly of the first and second transmission assemblies of the present utility model;

FIG. 9 is a schematic view of a housing of the present utility model;

FIG. 10 is a schematic view of the assembly of the internal components of the housing of the present utility model;

FIG. 11 is a schematic diagram showing the positional relationship of the first driving assembly when the dual-damper blower of the present utility model is in the first and fourth states;

FIG. 12 is a schematic diagram of a second driving assembly position relationship of the dual damper blower according to the present utility model in states one and two;

FIG. 13 is a schematic diagram illustrating a positional relationship of a first driving assembly when the dual-air door blower of the present utility model is in a second state;

FIG. 14 is a schematic view of the positional relationship of the first driving assembly when the dual damper blower of the present utility model is in state three;

FIG. 15 is a schematic view of the second driving assembly of the dual damper blower according to the present utility model in states three and four.

In the figure, 1, a gear shaft, 2, a first driving gear, 201, a first sector gear, 202, a first sliding fit portion, 203, a first shaft hole, 204, a second shaft hole, 205, a flap, 206, a rib, 207, a groove, 208, a sector slider, 2081, a limit surface, 209, a bump, 3, a damper assembly, 301, a vent, 302, a baffle, 4, a second driving gear, 401, a motor connection section, 402, a second sector gear, 403, a second sliding fit portion, 5, an output gear, 6, a first driven gear, 601, a fourth sector gear, 7, a long tooth, 8, a short tooth, 9, a first tooth, 10, a second tooth, 11, a second driven gear, 1101, a third sector gear, 12, a first output shaft, 13, a third tooth, 14, a fourth tooth, 15, a second output shaft, 16, a housing, 1601, a mounting hole, 1602, a limit boss, 1603, a limit post, 17, a cover, 18, and a driving member.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Example 1

As shown in fig. 1 to 4 and 8, an anti-rotation gear mounting structure includes a gear shaft 1 fixedly provided and a first driving gear 2 assembled with the gear shaft 1; the outer peripheral surface of the first driving gear 2 is provided with a first sector tooth 201 and a first sliding matching part 202 which are connected circumferentially, when the first sector tooth 201 is meshed with an adjacent gear, the first driving gear 2 can drive a baffle plate 302 in the air door assembly 3 to rotate, and when the first sliding matching part 202 abuts against the adjacent gear, the air door assembly 3 can be kept in an open or closed state; the outer diameter of the first sliding fit portion 202 is slightly larger than the diameter of the top circle of the first sector-shaped tooth 201, preferably 0.3-0.6 mm, so that adjacent gears can be matched with the first sliding fit portion 202 more tightly, tightness of the air door assembly 3 when closed is guaranteed, gaps between the baffle 302 and the ventilation opening 301 of the air door assembly 3 are avoided, and the overall temperature adjusting effect of the refrigerator is affected.

The inner peripheral surface of the first driving gear 2 is provided with a first shaft hole 203 and a second shaft hole 204 which are axially connected, the inner diameter of the first shaft hole 203 is larger than that of the second shaft hole 204, one end of the second shaft hole 204 facing the first shaft hole 203 is connected with a plurality of petals 205 which are circumferentially arranged and are not mutually connected, and a gap is reserved between the petals 205 and the first shaft hole 203; the inner peripheral surface of each lobe 205 is provided with a radially protruding bead 206, and when the torque received by the first drive gear 2 is smaller than a specified value, the first drive gear 2 can hug the gear shaft 1. The specified value refers to a driving force transmitted to the first driving gear 2 by the driving member, the first driving gear 2 is relatively fixed to the gear shaft 1 when the driving force does not act on the first driving gear 2, and the first driving gear 2 is rotatable relative to the gear shaft 1 when the driving force acts on the first driving gear 2. The ribs 206 extend along the circumferential direction of the inner wall of the valve body 205, and the inner diameter of the valve body 205 is 0.3mm to 0.4mm larger than the inner diameter of the ribs 206.

The gear shaft 1 is an optical axis, a plurality of, preferably 4-8, lobes 205 are circumferentially arrayed, and ribs 206 arranged on the inner circumferential surface of each lobe 205 have corresponding holding force with the gear shaft 1, so that noise generated by the air door assembly 3 and integral failure of the air door can not be caused due to too loose fit of holes and shafts. The inner diameters of the petals 205 and the second shaft hole 204 are the same, the petals 205 are positioned in the first shaft hole 203 and are not contacted with the first shaft hole 203, so that the petals 205 have a space expanding radially outwards, adjacent petals 205 are arranged at intervals, and grooves 207 extending to the end parts of the petals 205 are formed between the adjacent petals 205, namely the petals 205 are not connected into a whole circle, so that the petals 205 have expansion and contraction elasticity, the holding force is prevented from being too large, and the loss of a driving piece is large or the air door assembly 3 is not moved.

The lobe 205 preferably extends along the axial direction, the convex rib 206 is in a circular arc shape and is convex, when the gear shaft 1 is assembled with the first driving gear 2, the contact part of the convex rib 206 and the gear shaft 1 is in a smooth arc surface, so that friction to the gear shaft 1 is reduced, and abrupt resistance changes caused by edges and corners are avoided.

Example two

A dual damper air supply arrangement comprising a damper assembly 3, a drive member 18, a first transmission assembly and a second transmission assembly: the air door assemblies 3 are provided with two, and each air door assembly 3 is provided with a ventilation opening 301 and a baffle plate 302 capable of opening or closing the ventilation opening 301; the driving member 18 provides a rotational driving force, and the driving member 18 in this embodiment is a stepping motor, which can provide a forward rotational driving force and a reverse rotational driving force; the first transmission assembly comprises a second driving gear 4 and one or more gears meshed with the second driving gear 4 for transmission, the second driving gear 4 is in transmission connection with a driving piece 18, and a final gear of the first transmission assembly is connected with one of the air door assemblies 3; the second transmission assembly comprises the above-mentioned autorotation-preventing gear mounting structure and one or more gears meshed with the first driving gear 2 for transmission, the second driving gear 4 is in running fit with the gear shaft 1, the first driving gear 2 is pushed to rotate by the second driving gear 4, and the final gear of the second transmission assembly is connected with the other air door assembly 3.

For ease of description, the damper assembly 3 connected to the first drive assembly will be referred to hereinafter as a first damper assembly and the damper assembly 3 connected to the second drive assembly will be referred to as a second damper assembly. In this embodiment, the first transmission assembly and the second transmission assembly are two-stage transmission.

As shown in fig. 10, the output end of the driving member 18 is meshed with the second driving gear 4 through the output gear 5, the first driving gear 2 and the second driving gear 4 are assembled with the rotating shaft, the second driving gear 4 adopts a pushing direction to drive the first driving gear 2 to rotate instead of a meshing transmission mode, and in the rotating process of the second driving gear 4, the first driving gear 2 does not need to synchronously rotate in the whole course and only needs to rotate together when receiving circumferential pushing force. The specific pushing structure is described below.

As shown in fig. 4-8, the second transmission assembly in this embodiment is composed of a first driving gear 2 and a first driven gear 6, the first driven gear 6 is fixed on the first output shaft 12, the first output shaft 12 is connected with the second damper assembly to drive the baffle 302 of the second damper assembly to rotate, the outer circumferential surface of the first driven gear 6 is provided with a fourth sector gear 601, when the fourth sector gear 601 is meshed with the first sector gear 201, the baffle 302 of the second damper assembly rotates, and when the fourth sector gear 601 is contacted with the first sliding fit portion 202, the position of the baffle 302 of the second damper assembly is fixed. The fourth fan-shaped tooth 601 has a long tooth 7 with a longer axial length and a short tooth 8 with a shorter axial length, as shown in fig. 7, the long teeth 7 are respectively arranged at both ends and in the middle of the fan-shaped tooth 601, two sections of short teeth 8 are respectively arranged between the long teeth 7 at both ends and the long teeth 7 at the middle, and when the fourth fan-shaped tooth 601 contacts the first sliding fit portion 202, the long teeth 7 at both ends of the short teeth 8 are abutted against the first sliding fit portion 202, namely, the first tooth 9 and the second tooth 10 in fig. 7 are abutted against the first sliding fit portion 202 (as shown in fig. 12 and 15).

As shown in fig. 5, 6 and 8, the first transmission assembly is composed of a second driving gear 4 and a second driven gear 11. The outer peripheral surface of the second driving gear 4 is provided with a motor connecting section 401 and a transmission assembly connecting section which are axially connected, the motor connecting section 401 is a circular gear meshed with the driving piece 18 for transmission, and the transmission assembly connecting section is matched with the second driven gear 11 and can push the first driving gear 2 to rotate.

As shown in fig. 5 and 6, the transmission assembly connecting section includes a second sector tooth 402 and a second sliding engagement portion 403 which are circumferentially connected and in driving engagement with the second driven gear 11, and the outer diameter of the second sliding engagement portion 403 is slightly larger than the tip circle diameter of the second sector tooth 402. The principle of its cooperation with the second driven gear 11 is the same as that of the second transmission assembly. The second driven gear 11 is fixed on the second output shaft 15, and the first person's output shaft is connected with first air door subassembly, drives the baffle 302 of first air door subassembly and rotates, and the outer peripheral face of second driven gear 11 is equipped with third fan-shaped tooth 1101, and when third fan-shaped tooth 1101 and second fan-shaped tooth 402 meshing, the baffle 302 of first air door subassembly rotates, and when third fan-shaped tooth 1101 and second slip fit portion 403 contact, the baffle 302 position of first air door subassembly is fixed. The third sector tooth 1101 also has a long tooth 7 having a longer axial length and a short tooth 8 having a shorter axial length, and when the third sector tooth 1101 is in contact with the second sliding fit portion 403, the long teeth 7 at both ends of the short tooth 8 are abutted against the second sliding fit portion 403, that is, the third tooth 13 and the fourth tooth 14 in fig. 6 are abutted against the second sliding fit portion 403.

The second driving gear 4 pushes the first driving gear 2 to rotate by the following structure:

as shown in fig. 1 and 5, the axial length of the second sector teeth 402 is greater than the axial length of the second slip fit portion 403; the outer peripheral surface of the first driving gear 2 is provided with a sector sliding block 208 connected with one end of the first sliding fit part 202, and the sector sliding block 208 axially protrudes out of the first sector tooth 201; the portion of the second sector tooth 402 protruding from the second slip-fit portion 403 can be in contact with the circumferential side surface of the sector slider 208.

When assembled, the sector slide 208 is located towards the end of the second driving gear 4, the second sector tooth 402 and the first sector tooth 201 are not in one rotation circumference, and the second sector tooth 402 and the sector slide 208 are in the same rotation circumference. When the second driving gear 4 rotates until the second sector tooth 402 contacts with the one side limiting surface 2081 of the sector block 208, the second driving gear 4 pushes the first driving gear 2 to rotate, and when the second driving gear 4 rotates until the second sector tooth 402 contacts with the other side limiting surface 2081 of the sector block 208, the second driving gear 4 pushes the first driving gear 2 to rotate reversely.

As shown in fig. 3 and 4, a housing 16 and a housing cover 17 are further provided between the two damper assemblies 3, and the driving member 18, the first transmission assembly and the second transmission assembly are housed in the housing 16 and are covered by the housing cover 17. As shown in fig. 9, a mounting hole 1601 through which one output shaft passes and a plurality of limiting bosses 1602 limiting the driving member 18 are provided in the housing 16, and the gear shaft 1 is fixed to the housing 16. One of the output shafts is connected to the damper assembly 3 on one side of the housing 16 through a mounting hole 1601 and the other output shaft is connected to the damper assembly 3 on the other side through the cover 17.

In a further design, two limiting posts 1603 are further disposed in the housing 16, the first sliding fit portion 202 is provided with a radially protruding bump 209, the bump 209 is located between the two limiting posts 1603, and when the bump 209 abuts against one of the limiting posts 1603, the fourth sector tooth 601 contacts with the surface of the first sliding fit portion 202 near one side of the first sector tooth 201; when the bump 209 abuts against the other limiting post 1603, the fourth sector gear 601 contacts the surface of the first sliding fit portion 202 near the other side of the first sector gear 201.

The two limiting columns 1603 can limit the rotation angle of the first driving gear 2, when the second driving gear 4 pushes the fan-shaped sliding block 208 to be abutted with one of the limiting columns 1603, the second air door assembly reaches a door opening state, and when the second driving gear 4 pushes the fan-shaped sliding block 208 to be abutted with the other limiting column 1603, the second air door assembly reaches a door closing state.

The opening and closing action principle and the process of the air door device:

in the above embodiment, the damper device has two damper assemblies 3, with 4 different operating states. Each shutter assembly 3 has two states, open and closed, with only one shutter assembly 3 being active at each state switch, the following arrangement can be devised (the following state diagrams are all projected from the left side of the housing 16 in fig. 4):

state one: first and second damper assembly open states

Fig. 11 is a schematic view of the second driving gear 4 and the second driven gear 11 in the state where the first damper is opened. At this time, the two teeth three 13 of the second driven gear 11 are abutted against the second slip fit portion 403 of the second driving gear 4. Thereby ensuring that the damper 302 of the first damper assembly is fully open at an angle of 90 deg. -93 deg..

Fig. 12 is a schematic view of the first driving gear 2 and the first driven gear 6 in the second damper door opening state, where two teeth one 9 of the first driven gear 6 are abutted against the first sliding matching portion 202. Thereby ensuring that the damper 302 of the second damper assembly is fully open at an angle of 90 deg. -93 deg..

State two: first and second damper assembly closed and open states

By the driving member 18 driving the second driving gear 4 in the first state to rotate counterclockwise to the state shown in fig. 13, fig. 13 is a schematic diagram of the second driving gear 4 and the second driven gear 11 in the closed state of the first damper assembly. At this time, the second driven gear 11 rotates clockwise, the second driving gear 4 rotates counterclockwise, and the second driven gear 11 rotates through the cooperation of the second sector gear 402 and the third sector gear 1101, and at this time, the two teeth four 14 of the second driven gear 11 abut against the second sliding matching portion 403 of the second driving gear 4, and are completely closed.

Since the second sector teeth 402 are not in contact with the limiting surface 2081 of the sector slide 208, the positional relationship between the first driving gear 2 and the first driven gear 6 is unchanged (see fig. 12), and the door panel of the second damper assembly is still open.

State three: first and second damper assembly closed states

The second driving gear 4 in the second state is driven by the driving member 18 to rotate counterclockwise to reach the state shown in fig. 14, and fig. 14 is a schematic diagram of the second driving gear 4 and the second driven gear 11 in the open state of the first damper assembly. At this time, the second driven gear 11 slides on the surface of the second sliding engagement portion 403, and the first damper assembly is kept in a closed state.

The second sector teeth 402 of the second driving gear 4 push the limiting surface 2081 of the sector slider 208 to rotate anticlockwise, and the first driven gear 6 in fig. 12 rotates clockwise through the engagement of the first sector teeth 201 and the fourth sector teeth 601 until the protruding block 209 abuts against the limiting post 1603, as shown in fig. 15, at this time, the two teeth two 10 of the first driven gear 6 abut against the first sliding matching portion 202 of the first driving gear 2. The damper 302 of the second damper assembly is fully closed.

State four: first and second damper assembly open and closed states

By the second driving gear 4 in the third driving gear driving state 18 rotating clockwise, the second driven gear 11 in fig. 14 rotates counterclockwise to the state shown in fig. 11 by the engagement of the second sector teeth 402 with the third sector teeth 1101, at which time the two teeth three 13 of the second driven gear 11 again abut against the second slip fit portion 403 of the second driving gear 4, and the first damper assembly is opened.

Since the second sector teeth 402 are not in contact with the limiting surface 2081 of the sector slider 208, the positional relationship between the first driving gear 2 and the first driven gear 6 is unchanged (see fig. 15), and the second damper assembly remains closed.

In the description of the present utility model, it should be understood that the terms "center," "left," "inner," "outer," "axial," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In this specification, a schematic representation of the terms does not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (10)

1. An anti-rotation gear mounting structure which is characterized in that: comprises a gear shaft (1) which is fixedly arranged and a first driving gear (2) which is assembled with the gear shaft (1);

the outer peripheral surface of the first driving gear (2) is provided with a first sector tooth (201) and a first sliding fit part (202) which are connected circumferentially, and the outer diameter of the first sliding fit part (202) is slightly larger than the diameter of the top circle of the first sector tooth (201);

the inner peripheral surface of the first driving gear (2) is provided with a first shaft hole (203) and a second shaft hole (204) which are axially connected, the inner diameter of the first shaft hole (203) is larger than that of the second shaft hole (204), one end of the second shaft hole (204) facing the first shaft hole (203) is connected with a plurality of petals (205) which are circumferentially arranged and are not connected with each other, and a gap is reserved between the petals (205) and the first shaft hole (203);

the inner peripheral surface of each petal body (205) is provided with a radially protruding rib (206), and when the torque received by the first driving gear (2) is smaller than a specified value, the first driving gear (2) can hug the gear shaft (1).

2. The rotation preventing gear mounting structure according to claim 1, wherein: the valve body (205) extends along the axial direction, and the convex rib (206) is in a circular arc shape.

3. The rotation preventing gear mounting structure according to claim 1, wherein: the inner diameter of the valve body (205) is 0.3 mm-0.4 mm larger than the inner diameter of the convex rib (206).

4. A dual damper air supply arrangement comprising:

-a damper assembly (3), the damper assembly (3) being provided in two, both damper assemblies (3) having a vent opening (301) and a shutter (302) capable of opening or closing the vent opening (301);

a driving member (18) for providing a rotational driving force;

the first transmission assembly comprises a second driving gear (4) and one or more gears meshed with the second driving gear, the second driving gear (4) is in transmission connection with the driving piece (18), and the final gear of the first transmission assembly is connected with one of the air door assemblies (3);

a second transmission assembly comprising the anti-rotation gear mounting structure as claimed in any one of claims 1 to 3 and one or more stages of gears meshed with the first driving gear (2), wherein the second driving gear (4) is in running fit with the gear shaft (1), the first driving gear (2) is driven to rotate by the second driving gear (4), and the final gear of the second transmission assembly is connected with the other air door assembly (3).

5. The dual damper air supply arrangement of claim 4 wherein: the outer peripheral surface of the second driving gear (4) is provided with a motor connecting section (401) and a transmission assembly connecting section which are connected in an axial direction, and the motor connecting section (401) is a circular gear meshed with the driving piece (18) for transmission;

the transmission assembly connecting section comprises a second sector tooth (402) and a second sliding fit portion (403), wherein the second sector tooth (402) and the second sliding fit portion (403) are circumferentially connected and are in transmission fit with the next-stage gear, and the outer diameter of the second sliding fit portion (403) is slightly larger than the top circle diameter of the second sector tooth (402).

6. The dual damper air supply arrangement of claim 5 wherein: the axial length of the second sector tooth (402) is greater than the axial length of the second sliding fit portion (403); the outer peripheral surface of the first driving gear (2) is provided with a sector sliding block (208) connected with one end of the first sliding fit part (202), and the sector sliding block (208) axially protrudes out of the first sector tooth (201);

the portion of the second sector tooth (402) protruding from the second sliding fit portion (403) can be in contact with the circumferential side surface of the sector slider (208).

7. The dual damper air supply arrangement of claim 6 wherein: the first transmission assembly includes a third sector tooth (1101) that meshes with the second sector tooth (402); the second transmission assembly includes a fourth sector gear (601) that meshes with the first sector gear (201).

8. The dual damper air supply arrangement of claim 7 wherein: the air door assembly further comprises a shell (16) which is fixed with the air door assembly (3) and used for installing the driving piece (18), the first transmission assembly and the second transmission assembly, and one end of the shell (16) is open.

9. The dual damper air supply arrangement of claim 8 wherein: the gear shaft (1) is fixed on the shell (16), and a mounting hole (1601) for an output shaft to pass through and a plurality of limiting bosses (1602) for limiting the driving piece (18) are arranged in the shell (16).

10. The dual damper air supply arrangement of claim 8 wherein: two limit posts (1603) are further arranged in the shell (16), the first sliding fit part (202) is provided with a protruding block (209) protruding radially, the protruding block (209) is positioned between the two limit posts (1603), and when the protruding block (209) is abutted with one of the limit posts (1603), the fourth sector tooth (601) is in surface contact with the first sliding fit part (202) close to one side of the first sector tooth (201); when the lug (209) is abutted with the other limit post (1603), the fourth sector tooth (601) is in surface contact with the first sliding fit part (202) close to the other side of the first sector tooth (201).