Gear transmission mechanism and indoor unit having the same

Abstract

The application provides a gear transmission mechanism and an indoor unit with the same. The gear transmission mechanism comprises a first output shaft and a second output shaft, a driving member, a first gear assembly, a second gear assembly, a first worm member and a second worm member; the first gear assembly is connected with a first rotating shaft, and the second gear assembly is connected with a second rotating shaft; the first worm member is arranged to be reciprocally movable along the axial direction of the first output shaft, and the second worm member is arranged to be reciprocally movable along the axial direction of the second output shaft; the first worm member is located at a first position, and the first worm member connects the first gear assembly with the first output shaft; the second worm member is located at a second position, and the second worm member connects the first gear assembly with the second output shaft. The application can change the motion state of the first output shaft and the second output shaft by arranging only one driving member, and the first gear assembly and the second gear assembly can be independently controlled without interference.

Description

Technical Field

[0001] This invention belongs to the field of air conditioner technology, specifically relating to a gear transmission mechanism and an indoor unit having the gear transmission mechanism. Background Technology

[0002] Air conditioners are almost indispensable household appliances in modern life, serving to control ambient temperature. They also come equipped with other related functions, one of which is controllable airflow direction. Currently, most airflow directions are four-way, meaning vertical and horizontal. Vertical airflow is controlled by rotating air guide vanes, while horizontal airflow is controlled by rotating air sweeping blades.

[0003] Currently, the industry mainly relies on stepper motors to achieve the air sweeping function. Each relative direction of air sweeping is driven by a stepper motor. That is, one stepper motor is needed to achieve up-and-down air sweeping, and another stepper motor is needed to achieve left-and-right air sweeping. The corresponding controller also needs to add additional terminal interfaces. With the current background of rising prices of raw materials such as copper and aluminum, the cost of left-and-right air sweeping air conditioners with an additional motor also increases. Summary of the Invention

[0004] This invention provides a gear transmission mechanism and an indoor unit having the gear transmission mechanism, which can solve the technical problem of setting a single driving component to simultaneously drive the air guide plate and the left and right sweeping blades to achieve vertical and horizontal air sweeping.

[0005] The present invention provides a gear transmission mechanism including a first output shaft and a second output shaft, and further including a driving component, a first gear assembly, a second gear assembly, a first worm gear component and a second worm gear component;

[0006] The drive unit has a first rotating shaft and a second rotating shaft, a first gear assembly is connected to the first rotating shaft, and a second gear assembly is connected to the second rotating shaft;

[0007] The first worm gear and the second worm gear are respectively connected to the second gear assembly for transmission. The first worm gear is arranged to reciprocate along the axial direction of the first output shaft, and the second worm gear is arranged to reciprocate along the axial direction of the second output shaft.

[0008] The first worm gear has a first position connected to the first rotating shaft. The first worm gear is located in the first position and connects the first gear assembly and the first output shaft to drive the first output shaft to rotate. The second worm gear has a second position connected to the second rotating shaft. The second worm gear is located in the second position and connects the first gear assembly and the second output shaft to drive the second output shaft to rotate.

[0009] In some embodiments, the second gear assembly includes a third gear set and a fourth gear set connected to the second rotating shaft, with one end of the first worm gear member away from the first position connected to the third gear set, and one end of the second worm gear member away from the second position connected to the fourth gear set;

[0010] Both the third and fourth gear sets can rotate intermittently in either the forward or reverse direction.

[0011] In some embodiments, both the third gear set and the fourth gear set include a second gear ring, a second driving gear, a second driven gear, and a second connecting gear. The second driving gear meshes with the second rotating shaft, and the external teeth of the second connecting gear mesh with the external teeth of the second gear ring. The end of the first worm gear away from the first position and the end of the second worm gear away from the second position are respectively connected to the corresponding second connecting gear.

[0012] Both the second driving gear and the second driven gear include a second full tooth portion and a second half tooth portion. The two second full tooth portions mesh with each other, and the two second half tooth portions mesh with the internal teeth of the second gear ring respectively.

[0013] In some embodiments, both the first worm gear and the second worm gear include a connecting rod and a bearing sleeve. One end of the connecting rod is connected to the bearing sleeve, and the other end of the connecting rod is threadedly connected to the internal gear of the second connecting gear to drive the connecting rod to reciprocate.

[0014] The first output shaft and the second output shaft are respectively fitted with bevel gears, and the first output shaft and the second output shaft extend into the corresponding bearing sleeves;

[0015] The bearing sleeve is rotatably connected to the first gear assembly and drives the first gear assembly to mesh with the corresponding bevel gear, thereby driving the corresponding shaft to rotate.

[0016] In some embodiments, the first output shaft and the second output shaft are respectively provided with a first limiting tooth at one end of the corresponding bearing sleeve. The first limiting tooth has a first groove and a second groove. The inner wall of the bearing sleeve is provided with a rack. The first groove and the second groove are connected to the rack so that the corresponding rotating shaft can move along the axial direction of the rack.

[0017] In some embodiments, the first gear assembly includes a first gear set and a second gear set connected to a first rotating shaft, the end of the first worm gear near the first position is connected to the first gear set, and the end of the second worm gear near the second position is connected to the second gear set;

[0018] The first gear set can rotate intermittently in either the forward or reverse direction.

[0019] In some embodiments, the first gear set includes a first gear ring, a first driving gear, a first driven gear, and a first connecting gear. The first driving gear meshes with a first rotating shaft, the external teeth of the first connecting gear mesh with the external teeth of the first gear ring, and one end of the first worm gear near the first position is connected to the first connecting gear. The first worm gear can drive the first connecting gear to move back to the reset position.

[0020] Both the first driving gear and the first driven gear include a first full tooth portion and a first half tooth portion. The two first full tooth portions mesh with each other, and the two first half tooth portions mesh with the internal teeth of the first gear ring, respectively.

[0021] In some embodiments, the first rotating shaft and the second rotating shaft rotate in opposite directions, and a first ratchet and a second ratchet are respectively mounted on the first rotating shaft and the second rotating shaft, and the first ratchet and the second ratchet mesh with the first gear assembly and the second gear assembly, respectively.

[0022] In some embodiments, the device also includes a housing, in which a mounting bracket is provided. A first mounting shaft and a second mounting shaft are respectively provided on both sides of the mounting bracket. A first gear assembly is provided on the first mounting shaft, and a second gear assembly is provided on the second mounting shaft.

[0023] In some embodiments, the end of the first worm gear away from the first position and the end of the second worm gear away from the second position are respectively connected to the housing. The first worm gear and the second worm gear are respectively provided with sliding grooves. The connection between the housing and the first worm gear and the second worm gear is respectively provided with second limiting teeth. The second limiting teeth have a first protrusion and a second protrusion. The first protrusion and the second protrusion are connected to the sliding groove so that the corresponding worm gear can move axially along the sliding groove.

[0024] An indoor unit includes a gear transmission mechanism, characterized in that the gear transmission mechanism is the aforementioned gear transmission mechanism, the first output shaft is a guide vane transmission shaft, and the second output shaft is a sweeping blade transmission shaft.

[0025] The gear transmission mechanism and indoor unit having the gear transmission mechanism provided by the present invention have the following beneficial effects:

[0026] The first and second rotating shafts operate simultaneously. The first rotating shaft drives the first gear assembly to rotate, and the second rotating shaft drives the second gear assembly to rotate. During the rotation of the second gear assembly, the first and second worm gears move axially. When the first worm gear is displaced to a first position, it connects to the first output shaft and transmits the driving force of the first gear assembly to the first output shaft, thereby driving the first output shaft to rotate. When the second worm gear is displaced to a second position, it transmits the driving force of the first gear assembly to the second output shaft, thereby driving the second output shaft to rotate. When the first worm gear is not in the first position, the first output shaft remains stationary; when the second worm gear is not in the second position, the second output shaft remains stationary. This invention uses only one driving component to change the motion state of the first and second output shafts. Furthermore, the first and second gear assemblies can be controlled independently without interference. The first and second worm gears work in conjunction with the first and second gear assemblies, and their positions can be flexibly adjusted according to usage requirements. Attached Figure Description

[0027] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a gear transmission mechanism according to an embodiment of the present invention;

[0029] Figure 2 This is a top view of the gear transmission mechanism according to an embodiment of the present invention;

[0030] Figure 3 This is an exploded view of the gear transmission mechanism according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the box body according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the mounting bracket according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the first ratchet according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of a bevel gear according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the first toothed ring according to an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the first connecting gear according to an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the first driving gear according to an embodiment of the present invention;

[0038] Figure 11 This is a schematic diagram of the first driven gear in an embodiment of the present invention;

[0039] Figure 12 This is a schematic diagram of the first worm gear and the second worm gear according to an embodiment of the present invention;

[0040] Figure 13 This is a schematic diagram of the first limiting tooth in an embodiment of the present invention;

[0041] Figure 14 This is a schematic diagram showing the first connecting gear disengaging from the bevel gear in an embodiment of the present invention;

[0042] Figure 15 This is a schematic diagram of the meshing of the first connecting gear and the bevel gear in an embodiment of the present invention;

[0043] Figure 16 This is a schematic diagram of the air guide plate according to an embodiment of the present invention;

[0044] Figure 17 This is a side view schematic diagram of the air guide plate according to an embodiment of the present invention;

[0045] Figure 18 This is a schematic diagram of the sweeping blades according to an embodiment of the present invention;

[0046] Figure 19 This is a schematic diagram of the second limiting tooth in an embodiment of the present invention;

[0047] Figure 20 This is a schematic diagram of the indoor unit according to an embodiment of the present invention;

[0048] Figure 1: 1-First output shaft; 2-Second output shaft; 3-Driver; 31-First rotating shaft; 311-First ratchet; 32-Second rotating shaft; 312-Second ratchet; 4-First gear assembly; 41-First gear set; 401-First gear ring; 402-First driving gear; 403-First driven gear; 404-First connecting gear; 405-First full tooth section; 406-First half tooth section; 42-Second gear set; 5-Second gear assembly; 51-Third gear set; 52-Fourth gear set; 5 01-Second gear ring; 502-Second driving gear; 503-Second driven gear; 504-Second connecting gear; 505-Second full tooth section; 506-Second half tooth section; 61-First worm gear component; 62-Second worm gear component; 601-Connecting rod; 602-Bearing sleeve; 603-Bevel gear; 604-First limiting tooth; 605-Rack; 7-Box body; 701-Mounting bracket; 702-First mounting shaft; 703-Second mounting shaft; 704-Second limiting tooth; 8-Guide plate; 9-Sweeping blade. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0053] See also Figures 1 to 3 As shown, according to an embodiment of the present invention, a gear transmission mechanism is provided, which includes a first output shaft 1 and a second output shaft 2, and further includes a driving member 3, a first gear assembly 4, a second gear assembly 5, a first worm gear 61 and a second worm gear 62; the driving member 3 has a first rotating shaft 31 and a second rotating shaft 32, the first gear assembly 4 is connected to the first rotating shaft 31, and the second gear assembly 5 is connected to the second rotating shaft 32; the first worm gear 61 and the second worm gear 62 are respectively connected to the second gear assembly 5 in a transmission manner, the first worm gear 61 is reciprocatingly movable along the axial direction of the first output shaft 1, and the second worm gear 62 is reciprocatingly movable along the axial direction of the second output shaft 2;

[0054] The first worm gear 61 has a first position connected to the first rotating shaft 31. The first worm gear 61 is located in the first position and connects the first gear assembly 4 and the first output shaft 1 to drive the first output shaft 1 to rotate. The second worm gear 62 has a second position connected to the second rotating shaft 32. The second worm gear 62 is located in the second position and connects the first gear assembly 4 and the second output shaft 2 to drive the second output shaft 2 to rotate.

[0055] The first rotating shaft 31 and the second rotating shaft 32 operate simultaneously. The first rotating shaft 31 drives the first gear assembly 4 to rotate, and the second rotating shaft 32 drives the second gear assembly 5 to rotate. During the rotation of the second gear assembly 5, the first worm gear 61 and the second worm gear 62 move axially. When the first worm gear 61 is displaced to the first position, it is connected to the first output shaft 1 and can transmit the driving force of the first gear assembly 4 to the first output shaft 1, thereby driving the first output shaft 1 to rotate. When the second worm gear 62 is displaced to the second position, it can transmit the driving force of the first gear assembly 4 to the second output shaft 2, thereby driving the second output shaft 2 to rotate. When the first worm gear 61 is not in the first position, the first output shaft 1 remains stationary, and when the second worm gear 62 is not in the second position, the second output shaft 2 remains stationary. The present invention only requires one driving component 3 to change the motion state of the first output shaft 1 and the second output shaft 2, and the first gear assembly 4 and the second gear assembly 5 can be controlled independently without interfering with each other. Furthermore, the first worm gear 61 and the second worm gear 62 are used in conjunction with the first gear assembly 4 and the second gear assembly 5, and the moving positions of the first worm gear 61 and the second worm gear 62 can be flexibly adjusted according to the usage requirements.

[0056] See also Figure 4 and Figure 5 As shown, it also includes a housing 7, in which a mounting bracket 701 is provided. A first mounting shaft 702 and a second mounting shaft 703 are respectively provided on both sides of the mounting bracket 701. A first gear assembly 4 is provided on the first mounting shaft 702, and a second gear assembly 5 is provided on the second mounting shaft 703.

[0057] In one specific implementation, the housing 7 is installed on the indoor unit. The housing 7 includes a first sidewall and a second sidewall disposed opposite to each other. The first sidewall is provided with two first mounting holes, which are respectively used for the insertion of the first rotating shaft 31 and the second rotating shaft 32. The second sidewall is provided with two second mounting holes, which are respectively used for the extension of the first worm gear member 61 and the second worm gear member 62.

[0058] In one specific implementation, the mounting bracket 701 is plate-shaped and vertically arranged within the housing 7. A first mounting shaft 702 is located between the first side wall and the mounting bracket 701, and a second mounting shaft 703 is located between the second side wall and the mounting bracket 701. Specifically, based on the structure of the first gear assembly 4 and the second gear assembly 5, in this embodiment, the mounting bracket 701 is provided with two first mounting shafts 702 and four second mounting shafts 703, and the second side wall is provided with two third mounting shafts. In this embodiment, the first mounting shafts 702 and the second mounting shafts 703 provide support, facilitating the installation of the first gear assembly 4 and the second gear assembly 5 within the housing 7, thereby enabling transmission between the gear assemblies.

[0059] See also Figure 6 As shown, the first rotating shaft 31 and the second rotating shaft 32 rotate in opposite directions. The first rotating shaft 31 and the second rotating shaft 32 are respectively fitted with a first ratchet 311 and a second ratchet 321, which mesh with the first gear assembly 4 and the second gear assembly 5 respectively.

[0060] In this embodiment, the drive component 3 is a dual-axis motor, meaning that rotating shafts are respectively provided on both sides of the motor, and the two rotating shafts rotate in opposite directions: the first rotating shaft 31 rotates counterclockwise, and the second rotating shaft 32 rotates clockwise. The reverse teeth of the first ratchet 311 and the second ratchet 321 are provided on their inner sides, and meshing teeth are provided on their outer sides. This invention provides ratchets on the first rotating shaft 31 and the second rotating shaft 32, enabling unidirectional power transmission, thereby achieving forward and reverse power separation of the drive component 3. This allows the first gear assembly 4 and the second gear assembly 5 to be controlled independently without interference between them.

[0061] See also Figures 1 to 11 As shown, the first gear assembly 4 includes a first gear set 41 and a second gear set 42 connected to the first rotating shaft 31. The end of the first worm gear 61 near the first position is connected to the first gear set 41, and the end of the second worm gear 62 near the second position is connected to the second gear set 42. The first gear set 41 can rotate intermittently in the forward or reverse direction.

[0062] In this embodiment, when the drive unit 3 is activated, the first rotating shaft 31 rotates counterclockwise, driving the first gear set 41 and the second gear set 42 to rotate synchronously. The first gear set 41 and the second gear set 42 rotate in opposite directions. During this process, the first gear set 41 can rotate intermittently in the forward or reverse direction without changing the rotation direction of the drive unit 3.

[0063] The first gear set 41 includes a first gear ring 401, a first driving gear 402, a first driven gear 403, and a first connecting gear 404. The first driving gear 402 meshes with the first rotating shaft 31. The external teeth of the first connecting gear 404 mesh with the external teeth of the first gear ring 401. One end of the first worm gear 61 near the first position is connected to the first connecting gear 404. The first worm gear 61 can drive the first connecting gear 404 to move back and forth. The first driving gear 402 and the first driven gear 403 each include a first full tooth portion 405 and a first half tooth portion 406. The two first full tooth portions 405 mesh with each other, and the two first half tooth portions 406 respectively mesh with the internal teeth of the first gear ring 401.

[0064] In this embodiment, the first gear ring 401 is fixed to the housing 7 with a pin, and the first driving gear 402 and the first driven gear 403 are respectively mounted on the first mounting shaft 702. The first half-tooth portion 406 of the first driving gear 402 and the first driven gear 403 meshes with the internal teeth of the first gear ring 401, the first full-tooth portion 405 of the first driving gear 402 and the first driven gear 403 meshes with each other, and the external teeth of the first connecting gear 404 mesh with the external teeth of the first gear ring 401. Preferably, the first driving gear 402 is provided with a first connecting tooth in the axial direction, the diameter of the first connecting tooth is smaller than the diameter of the first driving gear 402, and the first connecting tooth meshes with the first ratchet 311 on the first rotating shaft 31. In this connection method of the first gear set 41, the rotation directions of the first driving gear 402 and the first driven gear 403 are opposite. Therefore, when the first half tooth 406 of the first driven gear 403 meshes with the internal tooth of the first gear ring 401, the rotation direction of the first gear ring 401 is the same as that of the first driven gear 403, and the rotation direction of the first gear ring 401 is opposite to that of the first connecting gear 404. When the first half tooth 406 of the first driving gear 402 meshes with the internal tooth of the first gear ring 401, the rotation direction of the first gear ring 401 is the same as that of the first driving gear 402, and the rotation direction of the first gear ring 401 is opposite to that of the first connecting gear 404. This allows the first gear ring 401 to achieve a cyclic forward and reverse rotation motion state without changing the rotation direction of the driving component 3.

[0065] A bevel gear 603 is fitted onto the first output shaft 1, and a first connecting gear 404 is provided with helical teeth. Specifically, when the first rotating shaft 31 is the drive shaft of the air guide plate 8, under the action of the second gear assembly 5, the first worm gear 61 moves and synchronously drives the first connecting gear 404 to move. When the first worm gear 61 is displaced to the first position, the first gear ring 401 rotates forward or backward, and the first connecting gear 404 rotates backward or forward. The first connecting gear 404 meshes with the bevel gear 603 on the drive shaft of the air guide plate 8, and the first connecting gear 404 synchronously drives the bevel gear 603 on the first output shaft 1 to rotate, thereby driving the drive shaft of the air guide plate 8 to rotate, thus changing the angle of the air guide plate 8 swinging up and down. In this embodiment, the angle of the air guide plate 8 will only change when the first connecting gear 404 meshes with the bevel gear 603 on the drive shaft of the air guide plate 8, and since the first gear ring 401 can cycle between forward and reverse rotation, the air guide plate 8 can swing up or down. When the first connecting gear 404 no longer meshes with the bevel gear 603 of the drive shaft of the air guide plate 8, the driving force of the first gear set 41 will not be transmitted to the drive shaft of the air guide plate 8. The angle of the air guide plate 8 remains fixed and does not change, that is, the air guide plate 8 continues to ventilate at this angle.

[0066] In one specific implementation, the second gear set 42 includes only a third driving gear with a larger diameter, and the external teeth of the first driving gear 402 mesh with the external teeth of the first ratchet 311. A bevel gear 603 is also provided on the second output shaft 2. When the second worm gear 62 moves to the second position, it drives the third driving gear to mesh with the bevel gear 603 on the second output shaft 2, thereby causing the second output shaft 2 to rotate.

[0067] In one specific implementation, when the second output shaft 2 is the drive shaft for the sweeping blade 9, multiple blades are inclined and spaced on the drive shaft. During the rotation of the drive shaft, the inclination angle of the multiple blades changes, thereby achieving left and right airflow from the sweeping blade 9. When the third drive gear is not meshed with the bevel gear 603 on the drive shaft, the angle of the multiple blades remains fixed and does not change, meaning the sweeping blade 9 continuously outputs air at that angle. In this embodiment, since the angular swing directions of the guide plate 8 and the sweeping blade 9 are different, in order to achieve the up-and-down swing of the guide plate 8, the first gear set 41 adopts a first gear ring 401 that can switch between forward and reverse rotation, thereby changing the up-and-down swing direction of the guide plate 8. The sweeping blade 9 only needs to be rotated by the shaft. The first gear set 41 and the second gear set 42 of the present invention can better adapt to the angle adjustment of the guide plate 8 and the sweeping blade 9 according to the different swing modes of the guide plate 8 and the sweeping blade 9.

[0068] The second gear assembly 5 includes a third gear set 51 and a fourth gear set 52 connected to the second rotating shaft 32. The end of the first worm gear 61 away from the first position is connected to the third gear set 51, and the end of the second worm gear 62 away from the second position is connected to the fourth gear set 52. The third gear set 51 and the fourth gear set 52 can rotate intermittently in either the forward or reverse direction.

[0069] In this embodiment, when the drive unit 3 is activated, the second rotating shaft 32 rotates clockwise, driving the third gear set 51 and the fourth gear set 52 to rotate synchronously. The third gear set 51 and the fourth gear set 52 rotate in opposite directions. During this process, the third gear set 51 and the fourth gear set 52 can rotate intermittently in the forward or reverse direction without changing the rotation direction of the drive unit 3.

[0070] Both the third gear set 51 and the fourth gear set 52 include a second gear ring 501, a second driving gear 502, a second driven gear 503, and a second connecting gear 504. The second driving gear 502 meshes with the second rotating shaft 32. The external teeth of the second connecting gear 504 mesh with the external teeth of the second gear ring 501. The end of the first worm gear 61 away from the first position and the end of the second worm gear 62 away from the second position are respectively connected to the corresponding second connecting gear 504. The second driving gear 502 and the second driven gear 503 each include a second full tooth portion 505 and a second half tooth portion 506. The two second full tooth portions 505 mesh with each other, and the two second half tooth portions 506 respectively mesh with the internal teeth of the second gear ring 501.

[0071] In this embodiment, the third gear set 51 and the fourth gear set 52 adopt the same structure. The second gear ring 501 is fixed to the housing 7 with a pin. The second driving gear 502 and the second driven gear 503 are respectively mounted on the second mounting shaft 703, and the second connecting gear 504 is mounted on the third mounting shaft. The second half-tooth portion 506 of the second driving gear 502 and the second driven gear 503 meshes with the internal teeth of the second gear ring 501. The second full-tooth portion 505 of the second driving gear 502 and the second driven gear 503 meshes with each other. The external teeth of the second connecting gear 504 mesh with the external teeth of the second gear ring 501. Preferably, the second driving gear 502 is provided with a second connecting tooth in the axial direction. The diameter of the second connecting tooth is smaller than the diameter of the second driving gear 502. The second connecting tooth meshes with the second ratchet 321 on the second rotating shaft 32. This connection method of the second gear set 42 causes the second driving gear 502 and the second driven gear 503 to rotate in opposite directions. Therefore, when the second half tooth 506 of the second driven gear 503 meshes with the internal tooth of the second gear ring 501, the second gear ring 501 and the second driven gear 503 rotate in the same direction, while the second gear ring 501 and the second connecting gear 504 rotate in opposite directions. When the second half tooth 506 of the second driving gear 502 meshes with the internal tooth of the second gear ring 501, the second gear ring 501 and the second driving gear 502 rotate in the same direction, while the second gear ring 501 and the second connecting gear 504 rotate in opposite directions. This allows the second gear ring 501 to achieve a cyclic forward and reverse rotation motion without changing the rotation direction of the driving member 3. Since the first worm gear 61 and the second worm gear 62 are connected to the third gear set 51 and the fourth gear set 52 respectively, during the rotation of the third gear set 51 and the fourth gear set 52, the first worm gear 61 and the second worm gear 62 are driven to move axially, respectively.

[0072] It is worth noting that in this embodiment, four gear sets are provided in total. The third gear set 51 and the fourth gear set 52 are used to drive the first worm gear 61 and the second worm gear 62 to move, so that the first gear set 41 and the bevel gear 603 of the first output shaft 1, and the second gear set 42 and the bevel gear 603 of the second output shaft 2 form a clutch structure. By controlling the position of the first worm gear 61 and the second worm gear 62, the connection state between them and the first gear assembly 4 can be achieved. The first gear set 41 and the second gear set 42 play a driving role. The driving force of the first gear set 41 and the second gear set 42 is transmitted to the first worm gear 61 and the second worm gear 62 respectively to realize the rotation of the first output shaft 1 and the second output shaft 2. When the drive component 3 rotates counterclockwise, it only drives the first gear set 41 and the second gear set 42; when the drive component 3 rotates clockwise, it only drives the third gear set 51 and the fourth gear set 52. Power distribution to the drive component 3 is achieved through ratchet transmission, allowing the control and drive parts of the gear transmission mechanism to move independently without interference. Switching control states does not affect the set angles of the guide vane 8 or the sweeping blades 9, and driving the guide vane 8 or the sweeping blades 9 does not affect the control state. Furthermore, by setting a bevel gear 603, power transmission to the guide vane 8 and the sweeping blades 9 can be controlled. The gear meshing transmission method is more reliable and less prone to step loss.

[0073] See also Figures 12 to 15 As shown, both the first worm gear 61 and the second worm gear 62 include a connecting rod 601 and a bearing sleeve 602. The connecting rod 601 is a screw, with one end connected to the bearing sleeve 602 and the other end connected to the internal thread of the second connecting gear 504 to drive the connecting rod 601 to reciprocate. The first output shaft 1 and the second output shaft 2 extend into the corresponding bearing sleeves 602. The bearing sleeves 602 are rotatably connected to the first gear assembly 4 and drive the first gear assembly 4 to mesh with the corresponding bevel gear 603 to drive the corresponding rotating shaft to rotate.

[0074] In this embodiment, taking the installation of the first output shaft 1 as an example, after the first output shaft 1 passes through the housing 7, a bevel gear 603 is installed, and the first connecting gear 404 is installed on the bearing sleeve 602. The first output shaft 1 extends into the bearing sleeve 602, and the first connecting gear 404 meshes with the first gear ring 401. The installation method of the second output shaft 2 is the same as that of the first output shaft 1. Since the first worm gear 61 and the second worm gear 62 in this embodiment play the role of driving the first connecting gear 404 and the third driving gear to move, a bearing sleeve 602 structure is adopted to avoid the first worm gear 61 and the second worm gear 62 from rotating. This structure can connect the first connecting gear 404 and the third driving gear and transmit the driving force to the first output shaft 1 and the second output shaft 2.

[0075] The first output shaft 1 and the second output shaft 2 are respectively provided with a first limiting tooth 604 at one end of the corresponding bearing sleeve 602. The first limiting tooth 604 has a first groove and a second groove. The inner wall of the bearing sleeve 602 is provided with a rack 605. The first groove and the second groove are connected to the rack 605 so that the corresponding rotating shaft can move along the axial direction of the rack 605.

[0076] In this embodiment, a short rack 605 is provided in the middle of the bearing sleeve 602, but the rack 605 is not provided at either end of the inner wall of the bearing sleeve 602. As the positions of the first worm gear 61 and the second worm gear 62 change, the connection point between the limiting tooth and the bearing sleeve 602 also changes. Taking the first worm gear 61 as an example, when the first worm gear 61 is displaced to the first position, the length of the first output shaft 1 extending into the bearing sleeve 602 increases. At this time, the first limiting tooth 604 is not connected to the rack 605, but is located at the position of the bearing sleeve 602 where the rack 605 is not machined. Thus, when the driving force of the first connecting gear 404 is transmitted to the second output shaft 2, the first output shaft 1 can... The first worm gear 61 is not in the first position, so the length of the first output shaft 1 extending into the bearing sleeve 602 is shortened. The first limiting tooth 604 connects with the rack 605. At this time, the first connecting gear 404 does not transmit driving force to the first output shaft 1. The first limiting tooth 604 can prevent the first output shaft 1 from rotating, which further ensures that the angle of the air guide plate 8 will not change. Moreover, during the movement of the first worm gear 61, it can move in a directional manner to prevent the first worm gear 61 from being misaligned relative to the first output shaft 1. The movement process of the second worm gear 62 is the same as that of the first worm gear 61.

[0077] The end of the first worm gear 61 away from the first position and the end of the second worm gear 62 away from the second position are respectively connected to the housing 7. The first worm gear 61 and the second worm gear 62 are respectively provided with sliding grooves. The connection between the housing 7 and the first worm gear 61 and the second worm gear 62 is respectively provided with second limiting teeth 704. The second limiting teeth 704 have a first protrusion and a second protrusion. The first protrusion and the second protrusion are connected to the sliding groove so that the corresponding worm gear can move axially along the sliding groove.

[0078] In this embodiment, when the second connecting gear 504 rotates, it generates a driving force on the first worm 61 and the second worm 62. The first worm 61 and the second worm 62 form a worm gear structure with the corresponding second connecting gear 504. The second limiting tooth 704 enables the first worm 61 and the second worm 62 to move axially without rotating.

[0079] See also Figures 16 to 20As shown, an indoor unit includes a gear transmission mechanism, the gear transmission mechanism being the aforementioned gear transmission mechanism, a first output shaft 1 being the transmission shaft of the air guide plate 8, and a second output shaft 2 being the transmission shaft of the sweeping blade 9.

[0080] In this embodiment, taking the switching of the up-and-down swing angle of the air guide plate 8 as an example, the specific process is as follows: 1) The first rotating shaft 31 rotates counterclockwise. At this time, the first worm gear 61 is not in the first position. Although the first ratchet 311 will rotate, it will not transmit driving force to the first output shaft 1; 2) The second rotating shaft 32 rotates clockwise. The second ratchet 321 is in the transmission state, driving the second driving gear 502 to rotate counterclockwise. When the second half tooth 506 of the second driving gear 502 meshes with the second gear ring 501, the second gear ring 501 rotates counterclockwise, and the second connecting gear 504 rotates clockwise, pushing the first worm gear 61 and the first connecting gear 404 to move to the first position; when the second half tooth 506 of the second driving gear 502 disengages from the second gear ring 501, the second half tooth 506 of the second driven gear 503 begins to mesh with the second gear ring 501, and the first worm gear 3) When component 61 moves to the first position, the second connecting gear 504 meshes with the bevel gear 603 on the first output shaft 1; 4) The first limiting tooth 604 on the drive shaft of the air guide plate 8 is not connected to the rack 605. At this time, the up and down swing angle of the air guide plate 8 can be adjusted. At this time, the first ratchet 311 drives the first gear ring 401 to rotate, thereby driving the first connecting gear 404 to continuously mesh with the bevel gear 603. The drive shaft of the air guide plate 8 rotates in a cycle to realize the up and down sweeping function; 5) When the second rotating shaft 32 rotates continuously, the second driven gear 503 rotates clockwise. The second half tooth 506 of the second driven gear 503 meshes with the second gear ring 501. The second connecting gear 504 rotates counterclockwise. The first worm component 61 moves in the opposite direction. The first connecting gear 404 and the bevel gear 603 no longer mesh. At this time, the angle of the air guide plate 8 is locked, thereby realizing the up and down range sweeping and fixed sweeping functions.

[0081] In this embodiment, the second gear ring 501 of the third gear set 51 and the fourth gear set 52 have different numbers of teeth. The tooth ratio of the second full-tooth section 505 is 2:3, and the speed ratio of the first worm gear 61 and the second worm gear 62 is 2:3. This allows for four different states: the first is that the first gear set 41 is engaged with the bevel gear 603, and the third driving gear is disengaged from the bevel gear 603; the second is that the first gear set 41 is disengaged from the bevel gear 603, and the third driving gear is engaged with the bevel gear 603; the third is that the first gear set 41 is disengaged from the bevel gear 603, and the third driving gear is disengaged from the bevel gear 603; and the fourth is that the first gear set 41 is engaged with the bevel gear 603, and the third driving gear is engaged with the bevel gear 603. The first state allows for vertical air sweeping of a single guide vane 8; the second state allows for horizontal air sweeping of a single sweeping blade 9; the third state allows for no air sweeping in any direction; and the fourth state allows for air sweeping in all directions.

[0082] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0083] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A gear transmission mechanism, comprising a first output shaft (1) and a second output shaft (2), characterized in that, It also includes a drive component (3), a first gear assembly (4), a second gear assembly (5), a first worm gear component (61), and a second worm gear component (62); The drive unit (3) has a first rotating shaft (31) and a second rotating shaft (32), the first gear assembly (4) is connected to the first rotating shaft (31), and the second gear assembly (5) is connected to the second rotating shaft (32); The first worm gear (61) and the second worm gear (62) are respectively connected to the second gear assembly (5) for transmission. The first worm gear (61) is arranged to reciprocate along the axial direction of the first output shaft (1), and the second worm gear (62) is arranged to reciprocate along the axial direction of the second output shaft (2). The first worm gear (61) has a first position connected to the first rotating shaft (31), the first worm gear (61) is located in the first position, the first worm gear (61) connects the first gear assembly (4) and the first output shaft (1) to drive the first output shaft (1) to rotate; the second worm gear (62) has a second position connected to the second rotating shaft (32), the second worm gear (62) is located in the second position, the second worm gear (62) connects the first gear assembly (4) and the second output shaft (2) to drive the second output shaft (2) to rotate; Both the first worm gear (61) and the second worm gear (62) include a connecting rod (601) and a bearing sleeve (602). One end of the connecting rod (601) is connected to the bearing sleeve (602), and the other end of the connecting rod (601) is threadedly connected to the internal gear of the second connecting gear (504) of the second gear assembly (5) to drive the connecting rod (601) to reciprocate. The first output shaft (1) and the second output shaft (2) are respectively fitted with bevel gears (603), and the first output shaft (1) and the second output shaft (2) extend into the corresponding bearing sleeves (602). The bearing sleeves (602) are rotatably connected to the first gear assembly (4) and drive the first gear assembly (4) to mesh with the corresponding bevel gears (603) to drive the corresponding rotating shaft to rotate.

2. The gear transmission mechanism according to claim 1, characterized in that, The second gear assembly (5) includes a third gear set (51) and a fourth gear set (52) connected to the second rotating shaft (32). The end of the first worm gear (61) away from the first position is connected to the third gear set (51), and the end of the second worm gear (62) away from the second position is connected to the fourth gear set (52). The third gear set (51) and the fourth gear set (52) can rotate intermittently in either the forward or reverse direction.

3. The gear transmission mechanism according to claim 2, characterized in that, The third gear set (51) and the fourth gear set (52) both include a second gear ring (501), a second driving gear (502), a second driven gear (503), and a second connecting gear (504). The second driving gear (502) meshes with the second rotating shaft (32). The external teeth of the second connecting gear (504) mesh with the external teeth of the second gear ring (501). The end of the first worm gear (61) away from the first position and the end of the second worm gear (62) away from the second position are respectively connected to the corresponding second connecting gear (504). The second driving gear (502) and the second driven gear (503) both include a second full tooth portion (505) and a second half tooth portion (506). The two second full tooth portions (505) mesh with each other, and the two second half tooth portions (506) mesh with the internal teeth of the second gear ring (501) respectively.

4. The gear transmission mechanism according to claim 1, characterized in that, The first output shaft (1) and the second output shaft (2) are respectively provided with a first limiting tooth (604) at one end of the corresponding bearing sleeve (602). The first limiting tooth (604) has a first groove and a second groove. The inner wall of the bearing sleeve (602) is provided with a rack (605). The first groove and the second groove are connected to the rack (605) so that the corresponding rotating shaft can move along the axial direction of the rack (605).

5. The gear transmission mechanism according to claim 1, characterized in that, The first gear assembly (4) includes a first gear set (41) and a second gear set (42) connected to the first rotating shaft (31), the first worm gear (61) is connected to the first gear set (41) at one end near the first position, and the second worm gear (62) is connected to the second gear set (42) at one end near the second position. The first gear set (41) can rotate intermittently in the forward or reverse direction.

6. The gear transmission mechanism according to claim 5, characterized in that, The first gear set (41) includes a first gear ring (401), a first driving gear (402), a first driven gear (403), and a first connecting gear (404). The first driving gear (402) meshes with the first rotating shaft (31). The external teeth of the first connecting gear (404) mesh with the external teeth of the first gear ring (401). The end of the first worm gear (61) near the first position is connected to the first connecting gear (404). The first worm gear (61) can drive the first connecting gear (404) to move back and forth. The first driving gear (402) and the first driven gear (403) each include a first full tooth portion (405) and a first half tooth portion (406). The two first full tooth portions (405) mesh with each other, and the two first half tooth portions (406) mesh with the internal teeth of the first gear ring (401) respectively.

7. The gear transmission mechanism according to claim 1, characterized in that, The first rotating shaft (31) and the second rotating shaft (32) rotate in opposite directions. The first rotating shaft (31) and the second rotating shaft (32) are respectively equipped with a first ratchet (311) and a second ratchet (312). The first ratchet (311) and the second ratchet (312) mesh with the first gear assembly (4) and the second gear assembly (5) respectively.

8. The gear transmission mechanism according to claim 1, characterized in that, It also includes a housing (7), in which a mounting bracket (701) is provided. A first mounting shaft (702) and a second mounting shaft (703) are respectively provided on both sides of the mounting bracket (701). The first gear assembly (4) is provided on the first mounting shaft (702), and the second gear assembly (5) is provided on the second mounting shaft (703).

9. The gear transmission mechanism according to claim 8, characterized in that, The end of the first worm gear (61) away from the first position and the end of the second worm gear (62) away from the second position are respectively connected to the housing (7). The first worm gear (61) and the second worm gear (62) are respectively provided with sliding grooves. The connection between the housing (7) and the first worm gear (61) and the second worm gear (62) is respectively provided with second limiting teeth (704). The second limiting teeth (704) have a first protrusion and a second protrusion. The first protrusion and the second protrusion are connected to the sliding groove so that the corresponding worm gear can move axially along the sliding groove.

10. An indoor unit comprising a gear transmission mechanism, characterized in that, The gear transmission mechanism is the gear transmission mechanism according to any one of claims 1 to 9, wherein the first output shaft (1) is the air guide plate transmission shaft and the second output shaft (2) is the air sweeping blade transmission shaft.

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