Crank for air conditioner, transmission box and air conditioner indoor unit

Abstract

The utility model provides a crank for an air conditioner, a transmission box and an air conditioner indoor unit. The crank comprises a connecting plate and a crankshaft. The connecting plate is rotatably arranged, and teeth are arranged on the outer edge of the connecting plate and used for being in meshing transmission with the transmission gear. The crankshaft vertically penetrates through the connecting plate, and the upper end of the crankshaft is a limiting protrusion used for being matched with the transmission cover body in an inserted mode. According to the crank for the air conditioner, the transmission box and the air conditioner indoor unit, the problem that a transmission assembly is poor in stability can be solved, and the effect of improving the stability of the transmission assembly is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a crank, a transmission box and an air conditioner indoor unit for an air conditioner. Background Art

[0002] Air conditioners can adjust and control parameters such as the temperature, humidity, and flow rate of indoor ambient air to create a more comfortable indoor environment, making them essential household appliances.

[0003] The air conditioner drives the vertical swing blades to swing through the motor-driven transmission assembly, which includes a crank and a connecting rod. During operation, the motor connected to the crank drives one crank to rotate, and one crank drives another crank to rotate through the connecting rod, thereby achieving synchronous swing of multiple vertical swing blades. However, the connection structure between the crank and the connecting rod is unstable, which easily leads to poor stability in the transmission assembly, thereby causing problems such as asynchronous swing of the vertical swing blades or inconsistent swing angles. In addition, dust in the air easily accumulates on the transmission assembly, causing wear of the transmission assembly or jamming of the transmission. Utility Model Content

[0004] In view of the above problems, the present utility model is proposed to provide a crank, a transmission box and an air conditioner indoor unit for an air conditioner that overcome the above problems or at least partially solve the above problems, and can solve the problem of poor stability of the transmission assembly, thereby achieving the effect of increasing the stability of the transmission assembly.

[0005] Specifically, the utility model provides a crank for an air conditioner, comprising:

[0006] A connecting plate, the connecting plate is rotatably arranged; the outer edge of the connecting plate is provided with teeth for meshing with the transmission gear for transmission;

[0007] A crankshaft vertically passes through the connecting plate, and the upper end of the crankshaft is a limiting protrusion for plugging into the transmission cover body.

[0008] Optionally, a supporting structure is provided on the upper surface of the connecting plate to support the transmission cover.

[0009] Optionally, the supporting structure includes a plurality of protrusions, and the plurality of protrusions are evenly arranged around the limiting protrusion.

[0010] Optionally, the end of the lower end of the crankshaft is a convex cone structure, and the convex cone structure is used to connect the vertical swing blade.

[0011] Optionally, the convex cone structure includes a first connector and a second connector, the size of the second connector is larger than that of the first connector; and the cross-section of the second connector includes two opposite straight lines and two opposite curves.

[0012] Optionally, the crankshaft further includes a stepped shaft section, wherein the stepped shaft section is located between the convex cone structure and the connecting plate and is used for mating with a transmission box body.

[0013] The utility model also provides a transmission box, comprising:

[0014] Transmission box body;

[0015] Transmission cover body, the transmission cover body can be detachably assembled on the transmission box body

[0016] A transmission assembly, wherein the transmission assembly comprises a crank, and the crank is any one of the cranks described above.

[0017] Optionally, a connecting portion is provided on the connecting plate, and the connecting portion is plug-fitted with the connecting rod so that the rotation of one crank drives the rotation of the other crank.

[0018] Optionally, a limiting structure is provided on the box body, and the limiting structure is configured such that: when one edge of the crank rotates to be matched with the limiting structure, the crank has a first limit position; when the other edge of the crank rotates to be matched with the limiting structure, the crank has a second limit position;

[0019] The cover body is provided with a connecting rod limiting boss, and the connecting rod limiting boss prevents the connecting rod from moving in the up and down directions.

[0020] The utility model also provides an air-conditioning indoor unit, comprising:

[0021] A housing and a crank as described in any one of the above items, wherein the crank is rotatably mounted on the housing.

[0022] In the crank, transmission box and air conditioner indoor unit for the air conditioner of the utility model, a limiting protrusion is provided at the upper end of the crank, and the limiting protrusion is inserted into the transmission cover body and matched with the transmission cover body. When the crank rotates, the limiting protrusion rotates in the hole of the transmission cover body, and the transmission cover body limits the position of the crank to prevent shaking when the crank rotates, so that the crank rotates more stably, thereby improving the stability of the operation of the air conditioner indoor unit and improving the user experience. In addition, the crank is arranged in the transmission box to prevent dust from falling on the crank, reduce the wear of the crank or the jamming of the transmission, and further improve the stability of the operation of the air conditioner indoor unit.

[0023] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0025] Figure 1 is a schematic structural diagram of a crank according to an embodiment of the utility model;

[0026] Figure 2 is a schematic structural diagram of a transmission box according to an embodiment of the utility model;

[0027] Figure 3 It is a schematic structural diagram of the assembly of a transmission component in a transmission box according to an embodiment of the utility model;

[0028] Figure 4 is a schematic structural diagram of a transmission box body according to an embodiment of the utility model;

[0029] Figure 5 is a schematic structural diagram of a transmission cover according to an embodiment of the utility model;

[0030] Figure 6 It is a schematic structural diagram of the connection between a crank and a vertical swing blade according to an embodiment of the utility model. DETAILED DESCRIPTION

[0031] Refer to the following Figures 1 to 6 To describe a crank, a transmission box and an air-conditioning indoor unit for an air conditioner in an embodiment of the utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0032] Unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0033] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0035] Figure 1 is a schematic structural diagram of a crank according to an embodiment of the utility model, such as Figure 1 As shown, and refer to Figures 2 to 6 The embodiment of the utility model provides a crank 310 for an air conditioner, comprising a connecting plate 311 and a crankshaft 312. The connecting plate 311 is rotatably arranged, and the outer edge of the connecting plate 311 is provided with teeth for meshing with a transmission gear 340 for transmission. The crankshaft 312 vertically passes through the connecting plate 311, and the upper end of the crankshaft 312 is a limiting protrusion 3121 for plugging with the transmission cover 20.

[0036] In this embodiment, a limiting protrusion 3121 is provided at the upper end of the crank 310, and the limiting protrusion 3121 is inserted into the transmission cover 20 and cooperates with the transmission cover 20. When the crank 310 rotates, the limiting protrusion 3121 rotates in the hole of the transmission cover 20, and the transmission cover 20 limits the position of the crank 310 to prevent the crank 310 from shaking when rotating, so that the crank 310 rotates more stably, thereby improving the stability of the air conditioner indoor unit and improving the user experience.

[0037] Further, the height of the connecting plate 311 is 3 mm. The height of the limiting protrusion 3121 is 4.5 mm. The diameter of the limiting protrusion 3121 is 8 mm to 8.05 mm. Preferably, the diameter of the limiting protrusion 3121 is 8 mm. The diameter of the tooth top circle of the connecting plate 311 is 22.5 mm.

[0038] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, a support structure 350 is provided on the upper surface of the connecting plate 311 to support the transmission cover 20 .

[0039] In this embodiment, after the crank 310 and the transmission cover 20 are installed, the support structure 350 is between the crank 310 and the transmission cover 20, and the support structure 350 supports the transmission cover 20. When the crank 310 rotates, the support structure 350 contacts the transmission cover 20, and there is a gap between the surface of the connecting plate 311 and the transmission cover 20, so as to prevent the connecting plate 311 from contacting with the transmission cover 20 when the crank 310 rotates, thereby preventing the wear and tear caused by the contact between the connecting plate 311 and the transmission cover 20, and avoiding affecting the rotation of the crank 310, thereby improving the stability of the operation of the crank 310.

[0040] In some embodiments of the present invention, the support structure 350 includes a plurality of protrusions, and the plurality of protrusions are evenly arranged around the limiting protrusion 3121 .

[0041] In this embodiment, a plurality of protrusions are in contact with the transmission cover 20 to support the transmission cover 20. When the crankshaft 312 rotates, the plurality of protrusions rotate relative to the transmission cover 20, reducing the contact area between the crank 310 and the transmission cover 20, preventing friction between the support structure 350 and the transmission cover 20 when the crank 310 rotates, making the rotation process of the crank 310 smoother, and reducing the wear of the support structure 350 or the transmission cover 20.

[0042] Furthermore, six protrusions are provided, and the diameter of each protrusion is 1.4 mm.

[0043] In some embodiments of the present invention, Figure 1 and Figure 6 As shown, the end of the lower end of the crankshaft 312 is a convex cone structure 3122, and the convex cone structure 3122 is used to connect the vertical swing blade 40.

[0044] In this embodiment, the convex cone structure 3122 is locked with the vertical swing leaf 40, and the connection method is simple, which facilitates the installation and removal of the crank 310 and the vertical swing leaf 40. In addition, the connection method of the convex cone structure 3122 is structurally stable, so that the rotation of the crankshaft 312 can drive the vertical swing leaf 40 to swing stably, thereby improving the stability of the crank 310 during rotation.

[0045] In some embodiments of the present invention, Figure 1 As shown, the convex cone structure 3122 includes a first connector 31221 and a second connector 31222, and the size of the second connector 31222 is larger than the size of the first connector 31221. The cross section of the second connector 31222 includes two opposite straight lines and two opposite curves.

[0046] Furthermore, the height of the first connecting body 31221 is 6 mm.

[0047] In some embodiments of the present invention, Figure 1 As shown, the crankshaft 312 also includes a stepped shaft section 3123 , which is located between the convex cone structure 3122 and the connecting plate 311 and is used for mating with the transmission box body 10 .

[0048] In this embodiment, the stepped shaft section 3123 is inserted into the transmission box body 10 and cooperates with the transmission box body 10. When the crank 310 rotates, the stepped shaft section 3123 rotates in the hole of the transmission box body 10, and the transmission box body 10 limits the position of the crank 310 from the bottom of the crank 310. The stepped shaft section 3123 cooperates with the transmission box body 10 without gaps, preventing the crank 310 from shaking when rotating, making the crank 310 more stable when rotating, thereby improving the stability of the indoor unit of the air conditioner and improving the user experience. In addition, the stepped shaft section 3123 cooperates with the transmission box body 10 without gaps, which can prevent dust from entering the transmission box body 10 through the hole of the transmission box body 10, and avoid dust from entering and causing damage to the crank 310.

[0049] Further, the stepped shaft section 3123 includes a first stepped shaft section 31231 and a second stepped shaft section 31232. The diameter of the first stepped shaft section 31231 is larger than the diameter of the second stepped shaft section 31232. The first stepped shaft section 31231 is tightly matched with the transmission box body 10. The diameter of the first stepped shaft section 31231 is 10.8 mm to 10.85 mm. The height of the first stepped shaft section 31231 is 2.7 mm, and the height of the second stepped shaft section 31232 is 6.3 mm.

[0050] Preferably, the diameter of the first stepped shaft segment 31231 is 10.8 mm.

[0051] The utility model embodiment also provides a transmission box 100, such as Figure 2As shown, the transmission box 100 includes a transmission box body 10, a transmission cover 20 and a transmission assembly. The transmission cover 20 can be detachably assembled on the transmission box body 10, and the transmission assembly includes a crank 310, which is the crank 310 in any of the above embodiments.

[0052] In this embodiment, the transmission assembly is arranged in the transmission box 100, and the crank 310 cooperates with the transmission box body 10 or the transmission cover body 20 to limit the position of the crank 310, thereby making the transmission of the transmission assembly more stable and improving the stability of the transmission assembly. In addition, the transmission assembly is arranged in the transmission box 100 to prevent dust from falling on the transmission assembly, reduce the wear of the transmission assembly or the jamming of the transmission, further improve the stability of the transmission assembly, and thus improve the stability of the operation of the air conditioner indoor unit.

[0053] In some embodiments of the present invention, a connecting portion is provided on the connecting plate 311 , and the connecting portion is plugged and matched with the connecting rod 320 , so that the rotation of one crank 310 drives the rotation of the other crank 310 .

[0054] In this embodiment, the transmission assembly includes two cranks 310 and a connecting rod 320. A connecting portion is provided on the connecting plate 311 of the crank 310, and both ends of the connecting rod 320 are plugged into and matched with the connecting portion. When the transmission assembly is working, the rotation of one crank 310 drives the connecting rod 320 to move, thereby driving the other crank 310 to rotate, so that the two cranks 310 have the same swing angle, and then the vertical swing leaf 40 connected to the crank 310 swings synchronously, and the transmission structure is stable and reliable.

[0055] Further, the distance between the center of the connecting column 3131 and the center of the crankshaft 312 is 14.8 mm to 15.2 mm.

[0056] Preferably, the distance between the center of the connecting column 3131 and the center of the crankshaft 312 is 15 mm.

[0057] In some embodiments of the present invention, Figure 1 As shown, the connection portion includes a claw 313, the claw 313 includes a connection column 3131 extending from the connection plate 311, and a clamping portion 3132 arranged at the end of the connection column 3131. Both ends of the connecting rod 320 have connection holes, and the connection holes are step holes. The diameter of one end of the step hole away from the connection plate 311 is larger than the diameter of the other end, so that the clamping portion 3132 is clamped with the step hole.

[0058] Furthermore, the diameter of the connecting column 3131 is 3.88 mm to 3.92 mm.

[0059] Preferably, the diameter of the connecting column 3131 is 3.9 mm.

[0060] Furthermore, the height of the connecting column 3131 is 4 mm. The diameter of the clamping portion 3132 is 4.8 mm, and the height of the clamping portion 3132 is 2 mm. There is a 0.4 mm step between the claw 313 and the connecting plate 311, so that after the connecting rod 320 is installed in the claw 313, the contact area between the connecting rod 313 and the connecting plate 311 is reduced when the transmission assembly is running.

[0061] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, a limiting structure is provided on the transmission box body 10, and the limiting structure is configured as follows: when one edge of the crank 310 rotates to cooperate with the limiting structure stop, the crank 310 has a first limit position; when the other edge of the crank 310 rotates to cooperate with the limiting structure stop, the crank 310 has a second limit position.

[0062] In this embodiment, a limiting structure is provided in the box body. After the crank 310 rotates to a certain angle, the limiting structure prevents the crank 310 from continuing to rotate, preventing the guide plate from rotating too much, which causes the mutual bite force of the double vertical swing blades 40 to be too large, and avoiding the appearance problems such as abnormal deformation of the guide plate. In addition, the limiting structure can prevent the vertical swing blade 40 from rotating too much and colliding with the air duct, thereby improving the stability of the operation of the air conditioner indoor unit.

[0063] Further, the two cranks 310 are respectively a first crank 360 and a second crank 370. The limiting structure includes a stop groove 141 and a first limit block 142 on both sides of the first crank 360, a second limit block 143 and a third limit block 144 on both sides of the second crank 370, and a fourth limit block 145 between the limit block and the second limit block 143, and the fourth limit block 145 is matched with the connecting rod 320 at the second limit position. For example, the limit position of the crank 310 rotating counterclockwise is the first limit position, and the limit position of the crank 310 rotating clockwise is the second limit position. When the crank 310 is at the first limit position, the stop groove 141 blocks the left edge of the first crank 360 to prevent the first crank 360 from continuing to rotate counterclockwise, and the second limit block 143 blocks the left edge of the second crank 370 to prevent the second crank 370 from continuing to rotate counterclockwise. When the crank 310 is at the second extreme position, the first limit block 142 blocks the right edge of the first crank 360 to prevent the first crank 360 from continuing to rotate clockwise, the fourth limit block 145 blocks the connecting rod 320 from continuing to move to prevent the first crank 360 and the second crank 370 from continuing to rotate clockwise, and the third limit block 144 blocks the right edge of the second crank 370 to prevent the second crank 370 from continuing to rotate clockwise.

[0064] In some embodiments of the present invention, Figure 5As shown, a connecting rod limiting boss 240 is provided on the transmission cover 20, and the connecting rod limiting boss 240 prevents the connecting rod 320 from moving in the up and down directions.

[0065] In this embodiment, the projection of the connecting rod 320 in the transmission box body 10 and the projection of the connecting rod limiting boss 240 in the transmission box body 10 at least partially overlap, so that when the connecting rod 320 moves away from the transmission box body 10, the connecting rod limiting boss 240 and the connecting rod 320 are blocked and matched. The connecting rod 320 is prevented from moving during the operation of the transmission assembly, thereby improving the stability of the transmission assembly.

[0066] In some embodiments of the present invention, Figure 4 As shown, the bottom of the box body is provided with a crank hole 150 and a convex strip 160, and one end of the crankshaft 312 away from the cover body passes through the crank hole 150. The convex strip 160 is arranged around the crank hole 150 to support the connecting plate 311.

[0067] In this embodiment, the crankshaft 312 is installed in the crank hole 150, and the crank hole 150 limits the position of the crankshaft 312, so that the crank 310 remains stable during the rotation process, thereby improving the stability of the transmission assembly. The convex strip 160 supports the connecting plate 311. When the crank 310 rotates, the convex strip 160 contacts the connecting plate 311, reducing the contact area between the connecting plate 311 and the bottom wall of the transmission box body 10, avoiding the wear of the connecting plate 311 or the wear of the transmission box body 10 caused by the direct contact between the connecting plate 311 and the transmission box body 10, and further improving the stability of the transmission assembly.

[0068] In some embodiments of the present invention, Figure 3 As shown, the transmission assembly also includes a motor 330 and a gear. The output shaft of the motor 330 is connected to the gear to drive the gear to rotate. The gear is meshed with the crank 310, and the crank 310 is driven to rotate by the rotation of the gear.

[0069] In this embodiment, when the transmission assembly is working, the motor 330 is turned on, the output shaft of the motor 330 drives the gear to rotate, the gear drives one crank 310 to rotate, and one crank 310 drives another crank 310 to rotate synchronously through the connecting rod 320. Through the stable torque output of the gear, the crank 310 rotates a preset angle, and the connecting rod 320 can drive another crank 310 to rotate, and the transmission problem is reliable. Moreover, no matter which crank 310 is driven, a stable angle rotation can be achieved, thereby improving the stability of the transmission assembly.

[0070] Furthermore, the motor 330 is fixed in the transmission box body 10 via the motor fixing structure 170 . The transmission gear 340 is fixed in the transmission box body 10 via the gear fixing structure 180 .

[0071] The embodiment of the utility model further provides an air conditioner indoor unit, comprising a housing and the crank 310 in any one of the above embodiments, wherein the crank 310 is rotatably mounted on the housing.

[0072] In this embodiment, the crank 310 is installed at both ends of the vertical swing blade 40 of the air conditioner indoor unit, and the crank 310 rotates to drive the vertical swing blade 40 to swing. The upper end of the crank 310 has a limiting protrusion 3121 that cooperates with the transmission cover 20. The transmission cover 20 limits the position of the crank 310 to prevent the crank 310 from shaking, thereby improving the stability of the crank 310, thereby improving the stability of the operation of the air conditioner indoor unit, and improving the user experience.

[0073] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A crank for an air conditioner, characterized in that: include: A connecting plate, the connecting plate is rotatably arranged; the outer edge of the connecting plate is provided with teeth for meshing with the transmission gear for transmission; A crankshaft vertically passes through the connecting plate, and the upper end of the crankshaft is a limiting protrusion for plugging into the transmission cover body.

2. The crank according to claim 1, characterized in that A supporting structure is provided on the upper surface of the connecting plate to support the transmission cover.

3. The crank according to claim 2, characterized in that: The supporting structure includes a plurality of protrusions, and the plurality of protrusions are evenly arranged around the limiting protrusion.

4. The crank according to claim 1, characterized in that The end portion of the lower end of the crankshaft is a convex cone structure, and the convex cone structure is used to connect the vertical swing blade.

5. The crank according to claim 4, characterized in that The convex cone structure includes a first connector and a second connector, the size of the second connector is larger than that of the first connector; the cross section of the second connector includes two opposite straight lines and two opposite curves.

6. The crank according to claim 4, characterized in that The crankshaft also includes a stepped shaft section, which is located between the convex cone structure and the connecting plate and is used for mating with a transmission box body.

7. A transmission box, characterized in that: include: Transmission box body; Transmission cover body, the transmission cover body can be detachably assembled on the transmission box body A transmission assembly, wherein the transmission assembly comprises a crank, and the crank is the crank described in any one of claims 1 to 6.

8. The transmission box according to claim 7, characterized in that: The transmission assembly includes two cranks and a connecting rod. A connecting portion is provided on the connecting plate of each crank. The connecting portion is plug-fitted with the connecting rod so that the rotation of one crank drives the rotation of the other crank.

9. The transmission box according to claim 7, characterized in that: The box body is provided with a limiting structure, and the limiting structure is configured such that: when one edge of the crank rotates to be matched with the limiting structure, the crank has a first limit position; when the other edge of the crank rotates to be matched with the limiting structure, the crank has a second limit position; The cover body is provided with a connecting rod limiting boss, and the connecting rod limiting boss prevents the connecting rod from moving in the up and down directions.

10. An air conditioner indoor unit, characterized in that: include: A housing and a crank as claimed in any one of claims 1 to 6, wherein the crank is rotatably mounted on the housing.

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