A kind of adapter of motion mechanism, motor drive assembly and extractor hood

Abstract

The utility model provides a kind of adapter of motion mechanism, motor drive assembly and extractor hood, belong to kitchen appliance technical field.The adapter of motion mechanism, comprising: adapter body;The motor output shaft connecting portion for connecting motor output shaft, the connecting rod connecting portion for connecting connecting rod and positioning portion are equipped on the adapter body;The thickness of the area where the motor output shaft connecting portion is greater than the thickness of the area where the connecting rod connecting portion is located.The thickness of the area where the motor output shaft connecting portion is greater than the thickness of the area where the connecting rod connecting portion is located, so that key stress point can withstand greater torque load, effectively improve the overall structural strength and torsional properties of adapter.This design avoids the deformation or fracture problem caused by motor output torque being too large, ensures the long-term stable operation of transmission system.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to an adapter for the motion mechanism of a range hood, a motor transmission assembly including the adapter, and a range hood using the assembly. Background Technology

[0002] With the continuous improvement of the intelligence and automation level of home appliances, the structural design of range hoods, as important air handling equipment in the kitchen environment, is also constantly being optimized and upgraded. The moving mechanism of a range hood typically includes a motor, a connecting rod, and an adapter connecting the motor output shaft and the connecting rod. This adapter plays a crucial role in the transmission system, not only needing to effectively transmit the power output from the motor to the connecting rod, but also ensuring the stability and reliability of the overall transmission system.

[0003] Because the motor output shaft generates a large torque during operation, and traditional adapters do not specifically reinforce the stress-bearing areas, they are prone to deformation or even breakage under high load conditions, affecting the normal operation of the entire transmission system. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a connector for a motion mechanism that can stably bear high torque.

[0005] In a first aspect, a transition component for a motion mechanism is provided, the transition component being connected between the output shaft of a motor and a connecting rod, comprising: a transition component body;

[0006] The adapter body includes an adapter piece and an adapter block that are connected to each other;

[0007] The adapter block is provided with a motor output shaft connecting part for connecting the motor output shaft, and the adapter piece is provided with a connecting rod connecting part for connecting the connecting rod.

[0008] The thickness of the adapter block is greater than the thickness of the adapter piece.

[0009] Furthermore, the upper end face of the adapter piece is coplanar with the upper end face of the adapter block, and the lower end face of the adapter block protrudes beyond the lower end face of the adapter piece.

[0010] Furthermore, the motor output shaft connection includes an output shaft insertion hole that extends longitudinally through the adapter body, and the motor output shaft passes through the output shaft insertion hole;

[0011] And / or, the side of the motor output shaft connection part is also provided with a radial positioning hole that communicates with the output shaft insertion hole, and the tightening bolt passes through the radial positioning hole and is radially tightened with the output shaft of the motor.

[0012] Furthermore, the output shaft socket is an oblong hole extending longitudinally.

[0013] Furthermore, the connecting rod connection includes a plurality of connecting holes arranged along predetermined positions.

[0014] Furthermore, the adapter plate is also provided with a positioning part, the positioning part including at least one positioning protrusion on the adapter body, and the connecting rod is provided with a limiting part, the connecting rod being adapted and positioned by the limiting part and the positioning part.

[0015] In a second aspect, a motor transmission assembly is provided, including a motor, a connecting rod, and a converter of the motion mechanism as described in the above technical solution;

[0016] The output shaft of the motor is adapted to be connected to the body of the adapter via the motor output shaft connecting part;

[0017] The connecting rod is connected to the adapter body via the connecting rod connection part.

[0018] Furthermore, the output shaft of the motor includes a double-flat shaft segment with two parallel planes.

[0019] Furthermore, the output shaft of the motor includes a first shaft section, a second shaft section, and a third shaft section connected sequentially from top to bottom in a stepped shape. The diameter of the first shaft section is smaller than the diameter of the second shaft section, and the diameter of the second shaft section is smaller than the diameter of the third shaft section. The second shaft section is the double flat shaft section.

[0020] The lower end face of the adapter body is engaged on the stepped surface formed between the second shaft segment and the third shaft segment;

[0021] A washer is provided between the lower end face of the connecting rod and the upper end face of the adapter body. The stepped surface formed between the first shaft segment and the second shaft segment is lower than the upper end face of the adapter body, forming an installation space for accommodating the washer.

[0022] Thirdly, a range hood is provided, including a transition component of the motion mechanism as described in the above technical solutions or a motor transmission assembly as described in the above technical solutions.

[0023] The embodiments of this utility model have the following advantages or beneficial effects:

[0024] The thickness of the area where the motor output shaft connection is located is greater than the thickness of the area where the connecting rod connection is located, allowing key stress-bearing parts to withstand greater torque loads and effectively improving the overall structural strength and torsional resistance of the adapter. This design avoids deformation or breakage caused by excessive motor output torque, ensuring the long-term stable operation of the transmission system. Attached Figure Description

[0025] The above and other features and advantages of this invention will become more apparent from a detailed description of exemplary embodiments with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of a transition member of a motion mechanism according to an exemplary embodiment;

[0027] Figure 2 This is a schematic diagram of the structure of a motor drive assembly according to an exemplary embodiment;

[0028] Figure 3 This is an exploded view of a motor drive assembly according to an exemplary embodiment;

[0029] Figure 4 This is a cross-sectional view of a motor drive assembly according to an exemplary embodiment.

[0030] The reference numerals in the attached figures are explained as follows:

[0031] 1. Adapter body, 2. Motor output shaft connection part, 3. Linkage connection part, 4. Positioning part, 5. Motor, 6. Linkage rod, 7. Limiting part, 8. First shaft section, 9. Second shaft section, 10. Third shaft section;

[0032] 11. Adapter plate; 12. Adapter block;

[0033] 21. Output shaft insertion hole; 22. Radial positioning hole. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0035] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0036] Figure 1 This is a schematic diagram of the structure of a transition member of a motion mechanism according to an exemplary embodiment; Figure 2 This is a schematic diagram of the structure of a motor drive assembly according to an exemplary embodiment; Figure 3 This is an exploded view of a motor drive assembly according to an exemplary embodiment; Figure 4 This is a cross-sectional view of a motor drive assembly according to an exemplary embodiment. The above schematic diagram is only for illustrating the structural relationships related to the inventive point and is not intended as an actual scale of a product.

[0037] Example 1

[0038] like Figure 1 As shown in the figure, an adapter for a motion mechanism according to an embodiment of the present invention is connected between the output shaft of a motor 5 and a connecting rod 6. The adapter body 1 includes an adapter plate 11 and an adapter block 12 connected to each other; the adapter block 12 is provided with a motor output shaft connecting portion 2 for connecting the output shaft of the motor.

[0039] The adapter plate 11 is provided with a connecting rod connecting part 3 for connecting the connecting rod 6; the thickness of the adapter block 12 is greater than the thickness of the adapter plate 11.

[0040] The thickness of the adapter block 12 is greater than the thickness of the adapter piece 11. This structural design enables the adapter to have higher structural strength and load-bearing capacity in key stress areas when bearing power from the motor output shaft, thereby effectively improving its torsional resistance and preventing deformation or breakage due to excessive torque.

[0041] In actual operation, when motor 5 starts and rotates, its output shaft transmits power to the motor output shaft connection part 2 of the adapter body 1. Subsequently, the power is transmitted through the adapter body 1 to the connecting rod connection part 3, driving the connecting rod 6 to move, thereby driving the subsequent mechanical structure to operate in conjunction. Because the adapter block 12 is thicker, it can withstand greater torque loads, improving the stability and service life of the overall transmission system.

[0042] The adapter body 1 consists of an adapter piece 11 and an adapter block 12. The two can be integrally molded or fixedly connected by fasteners or other connection methods to form a whole structure. The adapter piece 11 mainly serves the connection function with the connecting rod 6. It is provided with a connecting rod connecting part 3 for connecting with the connecting rod 6, and a positioning part 4 for precise positioning during assembly.

[0043] The adapter block 12 is mainly used to connect with the motor output shaft, and it is provided with a motor output shaft connection part 2. Since the motor 5 will output a large torque during operation, the adapter block 12 and the area of ​​the motor output shaft connection part 2 on it are designed with a thicker structure to enhance its load-bearing capacity and torsional strength, thereby improving the service life and reliability of the entire adapter.

[0044] By dividing the adapter body 1 into two parts, the adapter piece 11 and the adapter block 12, it is not only easier to process and manufacture, but also conducive to structural optimization according to different stress areas, so that the mechanical properties of each functional part can be fully utilized, thereby improving the stability and assembly adaptability of the overall transmission system.

[0045] In one embodiment, the upper end face of the adapter piece 11 is coplanar with the upper end face of the adapter block 12, and the lower end face of the adapter block 12 protrudes beyond the lower end face of the adapter piece 11. This structural design makes the overall upper surface of the adapter body 1 form a flat support surface, which is beneficial for assembly and docking with external components (such as the plate-shaped connecting rod 6).

[0046] Specifically, since the connected link 6 is a plate-shaped link 6, its main structure is flat, and the contact area with the adapter body 1 is concentrated on the upper plane. By setting the upper end surfaces of the adapter plate 11 and the adapter block 12 as a coplanar structure, the contact area and mating surface between the adapter body 1 and the plate-shaped link 6 can be effectively increased, thereby improving the stability and uniformity of the connection and avoiding structural deformation or loosening of the connection due to local stress concentration.

[0047] In addition, this coplanar structure also helps to simplify the assembly process, improve installation efficiency, and to a certain extent enhance the structural rigidity and operational stability of the overall transmission system.

[0048] The adapter body 1 can be made of metal, preferably carbon structural steel (such as 45 steel) or alloy structural steel (such as 40Cr), to ensure that it has good mechanical strength and fatigue resistance, and can withstand the torque transmitted by the motor output shaft and the alternating load generated during the movement of the connecting rod 6. In other embodiments, aluminum alloy, cast iron or high-strength engineering plastics can also be selected according to actual usage requirements.

[0049] The adapter body 1 can be formed by machining, forging, or casting. For metal adapters, precision forging combined with CNC machining is usually used: first, the preliminary structure is obtained by forging, and then key structural parts such as the motor output shaft connection 2, connecting rod connection 3, and positioning part 4 are precisely machined by CNC milling, drilling, boring, and other processes to ensure that the dimensional accuracy and geometric tolerances between the mating surfaces meet the assembly requirements.

[0050] For adapters with more complex structures, a one-piece casting process can be used, with reinforcing ribs or local thickening designs added to key stress areas to improve overall rigidity and load-bearing capacity. Furthermore, after machining, the surface of the adapter can be heat-treated (e.g., quenching, carburizing, nitriding) or treated with an anti-corrosion coating (e.g., galvanizing, blackening, spraying) to improve its wear resistance, corrosion resistance, and service life.

[0051] By selecting appropriate materials and optimizing manufacturing processes, the resulting adapters not only possess high structural strength and assembly precision, but also exhibit good processing economy and mass production feasibility, making them suitable for motion transmission systems in various automated equipment.

[0052] In one embodiment, the adapter body 1 (i.e., adapter block 12) is provided with a motor output shaft connection portion 2 for connecting to the motor output shaft. The motor output shaft connection portion 2 includes an output shaft insertion hole 21 that extends longitudinally through the adapter body 1. The axis of the output shaft insertion hole 21 corresponds to the central axis of the motor output shaft, serving to accommodate and position the insertion end of the motor output shaft. The output shaft of the motor 5 passes through the output shaft insertion hole 21. The shape of the output shaft insertion hole 21 can be designed as circular, oblong, or polygonal, etc., according to actual needs, to adapt to different types of motor output shaft structures and achieve effective torque transmission.

[0053] A radial positioning hole 22 communicating with the output shaft insertion hole 21 is also provided on the side of the motor output shaft connection part 2. The radial positioning hole 22 is usually located on one side or in multiple directions of the output shaft insertion hole 21, and its axis can be set perpendicular to or inclined to the axis of the output shaft insertion hole 21 to facilitate installation and adjustment. The radial positioning hole 22 is equipped with a locking bolt or a tightening screw. During the assembly process, the motor output shaft is first inserted into the output shaft insertion hole 21 and adjusted to a suitable position. Then, the tightening screw is screwed into the radial positioning hole 22, and its end is placed against the outer circumferential surface of the motor output shaft. By applying an appropriate tightening torque, the tightening screw firmly fixes the motor output shaft in the output shaft insertion hole 21 to prevent it from loosening or shifting during operation.

[0054] To further improve the reliability of the connection, an anti-slip structure, such as a keyway, knurling, or groove, can be provided on the inner wall of the output shaft socket 21 to enhance the frictional or mechanical fit between the adapter and the motor output shaft, thereby improving the stability and torsional resistance of the overall transmission system.

[0055] In one embodiment, the output shaft insertion hole 21 on the adapter body 1 is a waist-shaped hole extending longitudinally. The cross-sectional shape of the waist-shaped hole consists of two semi-circular ends and a rectangular middle part, forming an overall racetrack shape. This structural design is adapted to the structure of a double-flat shaft for the motor output shaft, that is, the outer peripheral surface of the motor output shaft has parallel planar areas on opposite sides, forming a so-called "double-flat shaft" structure, which is used for torque transmission connection with external transmission components.

[0056] During assembly, the motor output shaft is inserted into the oblong hole, so that the two planes of the double flat shaft fit into the straight section of the oblong hole, thereby achieving circumferential positioning and preventing slippage. At the same time, since the oblong hole has a certain axial adjustment space compared to the standard circular hole, the motor output shaft can be finely adjusted within a certain range to adapt to assembly errors or the usage requirements of output shafts of different specifications.

[0057] Furthermore, a radial positioning hole 22 communicating with the output shaft insertion hole 21 is provided on the side of the adapter body 1 for installing the tightening bolt. After the motor output shaft is inserted into place, tighten the tightening bolt so that its end presses against the planar area of ​​the motor output shaft. By applying an appropriate locking force, the fit gap between the double flat shaft and the oblong hole can be effectively eliminated, ensuring a tight fit between the two and improving the connection rigidity and transmission accuracy.

[0058] In one embodiment, the connecting rod connection portion 3 on the adapter body 1 includes a plurality of connecting holes arranged at predetermined positions. These connecting holes are used to achieve hinged or fixed connection with the external connecting rod 6 component via pins, bolts, or other connectors.

[0059] Multiple connecting holes are distributed in different positions according to actual transmission requirements, such as linear arrangement, arc distribution, or multiple rows and columns, to adapt to the connecting rod 6 structure with different installation angles and connection methods. By selecting different connecting holes as assembly points, the connection position between the connecting rod 6 and the adapter can be flexibly adjusted, thereby changing the stroke range or force state of the transmission system to meet the application requirements of various mechanical structures.

[0060] Furthermore, the diameter of each connecting hole can be standardized according to the specifications of the connectors used, and some connecting holes can also be set as countersunk holes, threaded holes or stepped holes to enhance the stability and reliability of the connection.

[0061] In one embodiment, the adapter plate 11 is further provided with a positioning part 4, which includes at least one positioning protrusion. The positioning protrusion is designed to ensure that the adapter can be accurately positioned and installed with other external components (such as the connecting rod 6, bracket, housing or other mechanical components), thereby improving the assembly accuracy and stability of the entire transmission system.

[0062] Each positioning protrusion can be rectangular, circular, trapezoidal, or other suitable shapes, and can have different height and width dimensions depending on the actual needs. The number of positioning protrusions can be determined according to the specific application scenario, usually one or more, to provide sufficient positioning support points to ensure that the adapter does not shift or misalign during installation.

[0063] A limiting part 7 is provided on the connecting rod 6, and the connecting rod 6 is positioned by adapting to the positioning part 4 through the limiting part 7.

[0064] During assembly, the positioning protrusion mates with corresponding limiting portions 7 (such as grooves, holes, or positioning surfaces) on external components (such as connecting rod 6). For example, when the adapter is installed in the predetermined position, the limiting portion 7 on the connecting rod 6 adapts to the positioning protrusion, positioning the connecting rod 6. Precise positioning of the connecting rod 6 is achieved through this mechanical limiting method. Furthermore, anti-slip textures or coatings can be added to the surface of the positioning protrusion to further enhance its positioning effect and wear resistance.

[0065] Example 2

[0066] like Figures 1 to 4 As shown, a motor transmission assembly includes a motor 5, a connecting rod 6, and a transition piece for the motion mechanism as described in Embodiment 1.

[0067] The motor 5 serves as the power source, and its output shaft is connected to the adapter body 1 via the motor output shaft connector 2. Specifically, the motor output shaft is inserted into the output shaft insertion hole 21 on the adapter body 1 to ensure precise alignment. If the output shaft has two parallel flat shaft sections, the corresponding output shaft insertion hole 21 is an oblong hole to ensure circumferential positioning and torque transmission between the motor output shaft and the adapter body 1. To further enhance the stability of the connection, a radial positioning hole 22 is provided on the side of the adapter body 1. By tightening the tightening bolt, the clearance between the motor output shaft and the oblong hole can be completely eliminated, ensuring that the motor output shaft is firmly fixed inside the adapter body 1.

[0068] The connecting rod 6, as an actuating component, is provided with a limiting part 7. The purpose of the limiting part 7 is to achieve precise positioning and engagement with the positioning part 4 on the adapter body 1. For example, the limiting part 7 can be one or more protrusions or grooves provided at the end of the connecting rod 6, while the positioning part 4 is correspondingly designed as a hole, groove, or protrusion so that the two can fit tightly together, ensuring that the connecting rod 6 can be accurately aligned and maintain a stable positional relationship during installation.

[0069] In the actual assembly process, firstly, the motor output shaft is inserted into the output shaft insertion hole 21 of the adapter body 1 and fixed by tightening bolts; then, the limiting part 7 of the connecting rod 6 is aligned with the positioning part 4 on the adapter body 1 and embedded to ensure that there is no relative sliding or offset between the two; finally, the connecting rod 6 is connected to the adapter body 1 through the connecting rod connecting part 3 using a pin or other connecting parts to complete the assembly of the entire transmission assembly.

[0070] The precise cooperation between the limiting part 7 and the positioning part 4 ensures accurate positioning between the connecting rod 6 and the adapter body 1, preventing functional failures due to installation errors. The mechanical limiting design reduces potential vibration or displacement of the connecting rod 6 during operation, improving the stability and reliability of the entire transmission system. Clear positioning guidance allows assemblers to quickly and accurately complete component assembly, reducing operational difficulty and time costs. Depending on different application requirements, diverse positioning needs can be met by adjusting the number, shape, and layout of the limiting part 7 and the positioning part 4.

[0071] In one embodiment, the output shaft of the motor 5 includes a stepped structure consisting of a first shaft segment 8, a second shaft segment 9, and a third shaft segment 10 connected sequentially from top to bottom. The diameter of the first shaft segment 8 is smaller than the diameter of the second shaft segment 9, and the diameter of the second shaft segment 9 is smaller than the diameter of the third shaft segment 10. The second shaft segment is a double-flat shaft segment. The stepped structures are formed by transitions between the shaft segments. This structure facilitates multi-level positioning and installation, as well as load distribution.

[0072] The lower end face of the adapter body 1 is engaged with the stepped surface formed between the second shaft 9 and the third shaft 10, allowing the adapter to be stably supported on the motor output shaft and to bear the power load from the motor 5 through this stepped surface. This engagement method has good axial limiting capability, which helps to prevent the adapter from axially shifting or falling off during operation.

[0073] Furthermore, a washer is provided between the lower end face of the connecting rod 6 and the upper end face of the adapter body 1. The stepped surface formed between the first shaft 8 and the second shaft 9 is lower (can be lower than 1 mm) than the upper end face of the adapter body 1, thus forming an installation space between them to accommodate the washer. This installation space can be used to place elastic washers, flat washers, or other types of auxiliary components to enhance the connection tightness between the motor 5 and the adapter, preventing loosening due to vibration or impact. At the same time, the design of this space also facilitates assembly, allowing components such as washers to be effectively limited, avoiding misalignment or slippage during installation.

[0074] Example 3

[0075] A range hood includes a transition component of the motion mechanism as described in Embodiment 1 or a motor drive assembly as described in Embodiment 2.

[0076] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0077] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0078] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connector for a motion mechanism, characterized in that, The adapter is connected between the output shaft of the motor (5) and the connecting rod (6), and includes: adapter body (1); The adapter body (1) includes an adapter piece (11) and an adapter block (12) that are connected to each other; The adapter block (12) is provided with a motor output shaft connection part (2) for connecting the output shaft of the motor (5), and the adapter piece (11) is provided with a connecting rod connection part (3) for connecting the connecting rod (6); The thickness of the adapter block (12) is greater than the thickness of the adapter piece (11).

2. The adapter for a motion mechanism according to claim 1, characterized in that, The upper end face of the adapter piece (11) is coplanar with the upper end face of the adapter block (12), and the lower end face of the adapter block (12) protrudes from the lower end face of the adapter piece (11).

3. A transition component for a motion mechanism according to claim 1 or 2, characterized in that, The motor output shaft connection part (2) includes an output shaft insertion hole (21) that extends longitudinally through the adapter body (1), and the output shaft of the motor (5) passes through the output shaft insertion hole (21); And / or, the side of the motor output shaft connection part (2) is also provided with a radial positioning hole (22) that communicates with the output shaft insertion hole (21), and the tightening bolt passes through the radial positioning hole (22) and is radially tightened with the output shaft of the motor (5).

4. The adapter for a motion mechanism according to claim 3, characterized in that, The output shaft socket (21) is a waist-shaped hole that extends longitudinally.

5. A transition member for a motion mechanism according to claim 1, 2, or 4, characterized in that, The connecting rod connection part (3) includes a plurality of connecting holes arranged along a predetermined position.

6. The adapter for a motion mechanism according to claim 5, characterized in that, The adapter piece (11) is also provided with a positioning part (4), the positioning part (4) includes at least one positioning protrusion provided on the adapter body (1), the connecting rod (6) is provided with a limiting part (7), and the connecting rod (6) is adapted and positioned with the positioning part (4) through the limiting part (7).

7. A motor drive assembly, characterized in that, Includes a motor (5), a connecting rod (6), and a transition piece of the motion mechanism as described in any one of claims 1 to 6; The output shaft of the motor (5) is adapted to be connected to the adapter body (1) through the motor output shaft connecting part (2); The connecting rod (6) is connected to the adapter body (1) through the connecting rod connecting part (3).

8. A motor drive assembly according to claim 7, characterized in that, The output shaft of the motor (5) includes a double flat shaft section with two parallel planes.

9. A motor drive assembly according to claim 8, characterized in that, The output shaft of the motor (5) includes a first section shaft (8), a second section shaft (9) and a third section shaft (10) connected from top to bottom in a stepped shape. The diameter of the first section shaft (8) is smaller than the diameter of the second section shaft (9), and the diameter of the second section shaft (9) is smaller than the diameter of the third section shaft (10). The second section shaft is the double flat shaft section. The lower end face of the adapter body (1) is engaged on the stepped surface formed between the second shaft (9) and the third shaft (10); A washer is provided between the lower end face of the connecting rod (6) and the upper end face of the adapter body (1). The stepped surface formed between the first shaft segment (8) and the second shaft segment (9) is lower than the upper end face of the adapter body (1), forming an installation space for accommodating the washer.

10. A range hood, characterized in that, It includes the adapter of the motion mechanism as described in any one of claims 1 to 6 or the motor drive assembly as described in any one of claims 7 to 9.

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