Drive device and range hood

Abstract

The present invention discloses a driving device and a range hood, which belong to the field of household appliance technology and are designed to solve the problems of the complexity of the existing range hood control method. The driving device provided by the present invention includes: a driving member; a transmission assembly, which is directly or indirectly connected to the driving member and can be raised and lowered under the drive of the driving member; a swing driving part is provided on the transmission assembly; and a pulling member, which is connected to the transmission assembly, and the pulling member is configured to drive the swing driving part to move when the transmission assembly descends to a set position. The driving device and range hood provided by the present invention only need one driving member to control the lifting and lowering of the smoke collecting chamber and the opening and closing of the flap, which solves the problems of complex control methods and high manufacturing costs caused by the provision of two driving devices in the existing device, saves energy and reduces consumption, and provides good user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a driving device and a range hood comprising the driving device. Background Art

[0002] A range hood is a household appliance used to exhaust indoor fumes to the outside. Its working principle is usually to use a fan to generate airflow, and the fumes are exhausted under the influence of the airflow. The range hood usually includes a shell and a smoke collecting chamber. The shell is provided with a smoke exhaust channel, and the smoke exhaust channel is provided with a fan; a flap is provided on the smoke collecting chamber, and the flap can cover the air inlet on the smoke collecting chamber.

[0003] In order to improve the aesthetics of the interior, a range hood currently has a retractable smoke collecting chamber. When oil smoke needs to be exhausted, the smoke collecting chamber extends out of the shell, the flap is opened, the oil smoke enters the smoke collecting chamber through the air inlet, and then enters the smoke exhaust channel through the channel of the smoke collecting chamber; when oil smoke does not need to be exhausted, the flap is closed to cover the air inlet of the smoke collecting chamber, and the smoke collecting chamber is partially retracted into the shell, thereby reducing the structure exposed outside the cabinet.

[0004] The defects of the range hood include: two driving components are required, one driving component is used to drive the smoke collecting chamber to rise and fall, and the other driving component is used to drive the flap to swing, the control method is complicated, and the manufacturing cost is high. Summary of the invention

[0005] The object of the present invention is to provide a driving device and a range hood, which have a simple control method and low manufacturing cost.

[0006] To achieve this object, on the one hand, the present invention adopts the following technical solutions:

[0007] A driving device comprises: a driving member; a transmission assembly directly or indirectly connected to the driving member and capable of rising and falling under the drive of the driving member; a swing driving part is arranged on the transmission assembly; and a pulling member connected to the transmission assembly, the pulling member being configured to drive the swing driving part to move when the transmission assembly descends to a set position.

[0008] In one of the preferred embodiments, the transmission assembly includes a meshing transmission rack and a transmission gear, the transmission rack is directly or indirectly connected to the pulling member and moves driven by the pulling member, and the swing drive unit is directly or indirectly connected to the transmission gear.

[0009] In one preferred embodiment, the transmission assembly further includes a linkage rod and a first connecting rod, the linkage rod is connected to the pulling member, one end of the first connecting rod is hinged to the linkage rod and the other end is hinged to the transmission rack.

[0010] In one of the preferred embodiments, the transmission assembly also includes a second connecting rod and a fixed frame, one end of the second connecting rod is hinged on the linkage rod and the other end is hinged and fixed on the fixed frame; the transmission rack, the transmission gear, the linkage rod, the first connecting rod and the second connecting rod are respectively arranged in the fixed frame.

[0011] In one of the preferred embodiments, a first sliding groove and a second sliding groove respectively extending along the moving direction of the transmission rack are provided on the fixed frame, a linkage rod limiting portion is provided on the linkage rod, the linkage rod limiting portion is located in the first sliding groove and can slide along the first sliding groove; a rack limiting portion is provided on the transmission rack, the rack limiting portion is located in the second sliding groove and can slide along the second sliding groove.

[0012] In one of the preferred embodiments, a mounting portion for fixing the fixing bracket is provided on the fixing bracket.

[0013] In one preferred embodiment, the driving device further comprises an elastic member, one end of which is fixed and the other end of which is directly or indirectly connected to the swing driving portion, and the elastic member is configured to drive the swing driving portion to reset.

[0014] In one preferred embodiment, the swing driving portion is C-shaped, one end of the swing driving portion is connected to the transmission gear, and the other end can swing around the axis of the transmission gear.

[0015] In one of the preferred embodiments, the transmission assembly also includes a gear transition connection, one end of which is directly or indirectly connected to the transmission gear and the other end is hinged to the swing drive unit, and the swing drive unit is configured to swing under the drive of the gear transition connection.

[0016] On the other hand, the present invention adopts the following technical solutions:

[0017] A range hood comprises a shell and a smoke collecting chamber, wherein a flap is provided on the smoke collecting chamber, and also comprises the above-mentioned driving device, wherein the transmission assembly is fixedly connected to the smoke collecting chamber, the smoke collecting chamber is directly or indirectly connected to the driving member, and the driving member is connected to the shell, and the swing driving part can push the flap to open to open the air inlet of the smoke collecting chamber.

[0018] The driving device provided by the present invention includes a driving member, a transmission assembly and a pulling member. When the transmission assembly descends to a set position, the pulling member can drive the swing driving part to move, thereby opening the flap. Only one driving member is required to control the lifting and lowering of the smoke collecting chamber and the opening and closing of the flap, which solves the problems of complex control method and high manufacturing cost caused by setting two driving devices in the existing device, saves energy and reduces consumption, and provides a good user experience.

[0019] The range hood provided by the present invention includes the above-mentioned driving device, and only needs one driving component to control the lifting and lowering of the smoke collecting chamber and the opening and closing of the flap, so the control method is simple, the energy consumption is low, and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural schematic diagram of a range hood provided in a specific embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the state of the driving device provided by a specific embodiment of the present invention, wherein a is a schematic diagram of the state of the driving device when the smoke collecting chamber is retracted, and b is a schematic diagram of the state of the driving device when the smoke collecting chamber is extended;

[0022] Figure 3 It is a structural schematic diagram of a transmission assembly provided in a specific embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the transmission assembly when the flap is closed provided by a specific embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram of the internal structure of the transmission assembly when the flap is opened provided by a specific embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the internal structure of the transmission assembly provided with an elastic member and when the flap is closed, according to a specific embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the internal structure of a transmission assembly provided with an elastic member and when the flap is opened, as provided in a specific embodiment of the present invention.

[0027] In the figure:

[0028] 1. Driving member; 2. Transmission assembly; 3. Pulling member; 4. Elastic member; 5. Elastic member connecting rod; 6. Casing; 7. Smoke collecting chamber; 21. Swinging driving part; 22. Transmission rack; 23. Transmission gear; 24. Linkage rod; 25. First connecting rod; 26. Second connecting rod; 27. Fixed frame; 28. Gear transition connector; 29. ​​Gear connecting rod; 51. Elastic member connecting rod limiting part; 61. Top plate; 71. Flap; 221. Rack limiting part; 241. Linkage rod limiting part; 261. Second connecting rod fixing part; 271. First slide slot; 272. Second slide slot; 273. Third slide slot; 274. Mounting part; 275. Elastic member fixing shaft; 281. Articulated shaft. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] This embodiment provides a driving device and a range hood including the driving device, which are used to discharge the fumes generated by cooking indoors to the outside. Figure 1 and Figure 2 As shown, the range hood includes a housing 6 and a smoke collecting chamber 7, and a flap 71 is provided on the smoke collecting chamber 7. The driving device includes a driving member 1, a transmission assembly 2 and a pulling member 3, and the pulling member 3 is configured to drive the swing driving part 21 to move when the transmission assembly 2 is lowered to a set position. The transmission assembly 2 is directly or indirectly connected to the driving member 1 and can be raised and lowered under the drive of the driving member 1, the pulling member 3 is connected to the transmission assembly 2, the transmission assembly 2 is fixedly connected to the smoke collecting chamber 7, the smoke collecting chamber 7 is directly or indirectly connected to the driving member 1, and the driving member 1 is connected to the housing 6. A swing driving part 21 is provided on the transmission assembly 2, and the swing driving part 21 can push the flap 71 to open to open the air inlet of the smoke collecting chamber 7.

[0036] The range hood uses a driving member 1 to realize the rise and fall of the smoke collecting chamber 7. When the smoke collecting chamber 7 falls to a set position, the pulling member 3 can pull the transmission assembly 2 fixedly connected to the smoke collecting chamber 7. After the transmission assembly 2 is pulled, the swing driving part 21 moves outward. After the swing driving part 21 moves a certain distance, it can push the flap 71 to open. Only one driving member 1 is needed to control the rise and fall of the smoke collecting chamber 7 and the opening and closing of the flap 71, which solves the problems of complex control methods and high manufacturing costs caused by setting two driving devices in the existing device, saves energy and reduces consumption, and provides good user experience.

[0037] The pulling member 3 may be, but is not limited to, an elastic cord, one end of which is fixed to the top plate 61 of the housing 6 and the other end is connected to the transmission assembly 2. The elastic cord itself is relatively soft. When the distance between the transmission assembly 2 and the top plate 61 is less than the length of the elastic cord, Figure 2 As shown in a, the elastic rope contracts or arbitrarily spirals and bends; when the smoke collecting chamber 7 descends to the set position, the distance between the transmission assembly 2 and the top plate 61 is equal to the length of the elastic rope, and the elastic rope is in a straight state. When the smoke collecting chamber 7 continues to descend, the elastic rope can no longer be extended, such as Figure 2 As shown in b, part of the structure on the transmission assembly 2 connected to the elastic rope cannot continue to descend along with the smoke collecting chamber 7.

[0038] like Figures 3 to 5 As shown, the transmission assembly 2 includes a meshing transmission rack 22 and a transmission gear 23 , the transmission rack 22 is directly or indirectly connected to the pulling member 3 and moves driven by the pulling member 3 , and the swing driving part 21 is directly or indirectly connected to the transmission gear 23 .

[0039] The top of the transmission rack 22 can be directly connected to the elastic rope. When the smoke collecting chamber 7 descends to the set position, the elastic rope no longer extends, and the transmission rack 22 cannot continue to descend with the smoke collecting chamber 7, so the transmission rack 22 moves up relative to the smoke collecting chamber 7; the transmission gear 23 is fixedly connected to the smoke collecting chamber 7, and the transmission rack 22 is also in an upward state relative to the transmission gear 23. Because the transmission rack 22 and the transmission gear 23 are meshed, the transmission gear 23 rotates counterclockwise, thereby driving the swing drive unit 21 to extend outward. The end of the swing drive unit 21 is hinged on the flap 71 or only presses on the inner surface of the flap 71. The swing drive unit 21 extends outward to push the flap 71 to open, so as to open the air inlet of the smoke collecting chamber 7.

[0040] Although the function of the drive device can be realized by directly connecting the transmission rack 22 to the elastic rope, the force on the elastic rope will directly act on the transmission rack 22, causing the transmission rack 22 to start or stop suddenly, which in turn causes the initial acceleration of the flap 71 to be large, which may generate noise and easily damage the flap 71. Moreover, the sudden movement of the flap 71 may hurt or scare the user, resulting in a poor user experience. In addition, the elastic rope must be set directly above the transmission rack 22, which has a relatively large restriction on the structure of the drive device and even the structure of the range hood, which is not conducive to the miniaturization of the range hood.

[0041] In order to solve the above problems, the transmission assembly 2 further includes a linkage rod 24 and a first linkage rod 25. The linkage rod 24 is connected to the pulling member 3. One end of the first linkage rod 25 is hinged on the linkage rod 24 and the other end is hinged on the transmission rack 22. The tension on the elastic rope acts on the transmission rack 22 after being transmitted by the linkage rod 24 and the first linkage rod 25, which does not affect the pulling of the transmission rack 22, and can use the linkage rod 24 and the first linkage rod 25 as a buffer to avoid the transmission rack 22 from starting and stopping suddenly, making the movement of the flap 71 more gentle, and extending the service life of the transmission rack 22, the transmission gear 23 and the flap 71. The linkage rod 24 and the first linkage rod 25 can be designed according to the specific conditions of the driving device and the range hood, and the pulling member 3, the linkage rod 24, the first linkage rod 25 and the transmission rack 22 are set by making full use of the idle position in the driving device and the range hood, so that the structure is more reasonable and the size of the range hood is smaller.

[0042] On the basis of the above structure, the transmission assembly 2 further includes a second connecting rod 26 and a fixing frame 27. One end of the second connecting rod 26 is hinged on the linkage rod 24 and the other end is hinged and fixed on the fixing frame 27 through the second connecting rod fixing portion 261, which limits the range of motion of the linkage rod 24, ensures that the force applied by the pulling member 3 can be more used to pull the transmission rack 22, rather than to offset the pulling force generated by the lateral displacement of the linkage rod 24, ensures that the flap 71 can be opened to the set angle, and exhausts the oil smoke more thoroughly.

[0043] The transmission rack 22, the transmission gear 23, the linkage rod 24, the first connecting rod 25 and the second connecting rod 26 are respectively arranged in the fixed frame 27, which has a more compact structure and is more convenient for disassembly and assembly; the fixed frame 27 can protect the internal components to prevent the components from being stuck or damaged due to foreign objects, thereby extending the service life of the drive device and improving the working stability of the drive device.

[0044] On the basis of the above structure, a first slide groove 271 and a second slide groove 272 extending along the moving direction of the transmission rack 22 are provided on the fixed frame 27, and a linkage rod limiting portion 241 is provided on the linkage rod 24. The linkage rod limiting portion 241 is located in the first slide groove 271 and can slide along the first slide groove 271, ensuring that the linkage rod 24 can only move along the moving direction of the transmission rack 22 to prevent the linkage rod 24 from lateral shaking. A rack limiting portion 221 is provided on the transmission rack 22, and the rack limiting portion 221 is located in the second slide groove 272 and can slide along the second slide groove 272 to limit the moving direction of the transmission rack 22, thereby preventing the transmission rack 22 from lateral shaking and making the opening and closing of the flap 71 more stable.

[0045] The shape of the swing drive unit 21 is not limited, as long as it can swing under the drive gear 23 to open the flap 71. A preferred structure is that the swing drive unit 21 is C-shaped, one end of the swing drive unit 21 is connected to the drive gear 23, and the other end can swing around the axis of the drive gear 23. The structure is simple and practical, and the flap 71 responds quickly. The disadvantage of this structure is that there are great restrictions on the size of the swing drive unit 21, the location and size of the drive gear 23, etc., so as to avoid causing the flap 71 to get stuck.

[0046] Another preferred structure is that the transmission assembly 2 further includes a gear transition connector 28, one end of which is connected to the transmission gear 23, and the other end is hinged to the swing drive unit 21. The swing drive unit 21 is C-shaped, one end of which is hinged to the fixed frame 27 through the drive unit fixed shaft 211, and the other end can swing around the hinge under the push of the gear transition connector 28, thereby pushing the flap 71 to open. In this structure, there are relatively few restrictions on the shape and size of the swing drive unit 21, and the design difficulty is low.

[0047] In another preferred structure, the transmission assembly 2 further includes a gear connecting rod 29 fixedly connected to the transmission gear 23, one end of the gear transition connecting member 28 is connected to the gear connecting rod 29 through a hinge shaft 281, and the other end is hinged to the swing driving part 21. The shape, installation method and working principle of the swing driving part 21 are the same as those of the previous preferred structure, and will not be repeated here.

[0048] Based on the above structure, Figure 1 and Figure 3 As shown, the fixing frame 27 is provided with a mounting portion 274 for fixing the fixing frame 27 to the smoke collecting chamber 7. A through hole (not shown) can be provided on the mounting portion 274, and a bolt or other connecting member is passed through the through hole to fix the mounting portion 274 to the smoke collecting chamber 7, which is convenient for assembly and disassembly and has a low manufacturing cost. The mounting portion 274 can also be fixedly connected to the smoke collecting chamber 7 by other methods, such as bonding or welding.

[0049] After the range hood is finished working, the driving member 1 drives the smoke collecting chamber 7 to rise. When the distance between the transmission assembly 2 and the top plate 61 is less than the length of the elastic rope, the elastic rope shrinks or randomly twists and bends, and no longer applies force to the transmission assembly 2. At this time, the flap 71 falls back under the action of its own gravity, pushing the swing drive unit 21 to swing in the opposite direction; the transmission rack 22, which has lost its upward pulling force, also falls due to its own gravity, and the transmission gear 23 rotates clockwise under the joint action of the swing drive unit 21 and the transmission rack 22 until the flap 71 completely blocks the air inlet of the smoke collecting chamber 7.

[0050] The flap 71 is relatively slow to return to its original position by its own weight, and it is even possible that the flap 71 cannot be completely closed. Figure 6 and Figure 7 As shown, the driving device further includes an elastic member 4, one end of which is fixed to the elastic member fixing shaft 275 of the fixing frame 27, and the other end of which is directly connected to the swing driving part 21, or indirectly connected to the swing driving part 21 through the elastic member connecting rod 5. When the swing driving part 21 is in the initial position, the elastic member 4 is in a normal state (such as Figure 6 As shown in FIG. 2 ), the elastic member connecting rod 5 is only connected to the hinge shaft 281, but does not exert force on the gear transition connecting member 28 and the gear connecting rod 29; when the swing driving part 21 starts to swing outward under the drive of the gear transition connecting member 28 and the gear connecting rod 29, the elastic member connecting rod 5 moves downward along with the hinge shaft 281, and the elastic member 4 is stretched (as shown in FIG. 2 ). Figure 7 As shown) and realize the damping effect, so that the opening process of the flap 71 is smoother; when the range hood is finished working, the pulling force applied to the transmission assembly 2 is cancelled, the elastic member 4 contracts, and the swing drive part 21 is pulled upward through the elastic member connecting rod 5, the gear transition connecting member 28 and the gear connecting rod 29 until the swing drive part 21 is reset, thereby realizing the complete closure of the flap 71.

[0051] The elastic member 4 may be, but is not limited to, a spring, and may be elastically deformable. The fixing frame 27 is provided with a third slide groove 273, which extends along the moving direction of the transmission rack 22. The elastic member connecting rod 5 is provided with an elastic member connecting rod limiting portion 51, which is inserted into the third slide groove 273 and can slide along the third slide groove 273 (such as Figure 3 As shown), the moving direction of the elastic member connecting rod 5 is restricted to prevent the elastic member connecting rod 5 from lateral shaking, and the flap 71 opens and closes more smoothly.

[0052] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A driving device, characterized in that: include: A driving member (1); A transmission assembly (2) is directly or indirectly connected to the driving member (1) and can be raised and lowered under the drive of the driving member (1); the transmission assembly (2) is provided with a swing driving part (21); and, A pulling member (3) connected to the transmission assembly (2), wherein the pulling member (3) is configured to drive the swing drive portion (21) to move when the transmission assembly (2) is lowered to a set position; The transmission assembly (2) comprises a transmission rack (22) and a transmission gear (23) meshing with each other, the transmission rack (22) is directly or indirectly connected to the pulling member (3) and moves under the drive of the pulling member (3), and the swing driving part (21) is directly or indirectly connected to the transmission gear (23); The transmission assembly (2) further comprises a linkage rod (24) and a first link rod (25), wherein the linkage rod (24) is connected to the pulling member (3), and one end of the first link rod (25) is hinged to the linkage rod (24) and the other end is hinged to the transmission rack (22); When the transmission gear (23) descends to a set position, the pulling member (3) pulls the transmission rack (22) to move to an upward state relative to the transmission gear (23), and the transmission gear (23) rotates to drive the swing drive part (21) to extend outward.

2. The driving device according to claim 1, characterized in that: The transmission assembly (2) further comprises a second connecting rod (26) and a fixing frame (27); one end of the second connecting rod (26) is hinged on the linkage rod (24) and the other end is hinged and fixed on the fixing frame (27); the transmission rack (22), the transmission gear (23), the linkage rod (24), the first connecting rod (25) and the second connecting rod (26) are respectively arranged in the fixing frame (27).

3. The driving device according to claim 2, characterized in that: A first slide groove (271) and a second slide groove (272) are provided on the fixed frame (27) and extend respectively along the moving direction of the transmission rack (22); a linkage rod limiting portion (241) is provided on the linkage rod (24); the linkage rod limiting portion (241) is located in the first slide groove (271) and can slide along the first slide groove (271); a rack limiting portion (221) is provided on the transmission rack (22); the rack limiting portion (221) is located in the second slide groove (272) and can slide along the second slide groove (272).

4. The driving device according to claim 2, characterized in that: The fixing frame (27) is provided with a mounting portion (274) for fixing the fixing frame (27).

5. The driving device according to any one of claims 1 to 4, characterized in that: The driving device further comprises an elastic member (4), one end of which is fixed and the other end of which is directly or indirectly connected to the swing driving portion (21), and the elastic member (4) is configured to be able to drive the swing driving portion (21) to reset.

6. The driving device according to any one of claims 1 to 4, characterized in that: The swing driving part (21) is C-shaped, one end of the swing driving part (21) is connected to the transmission gear (23), and the other end can swing around the axis of the transmission gear (23).

7. The driving device according to any one of claims 1 to 4, characterized in that: The transmission assembly (2) further comprises a gear transition connection (28), one end of the gear transition connection (28) being directly or indirectly connected to the transmission gear (23) and the other end being hinged to the swing drive unit (21), the swing drive unit (21) being configured to be able to swing under the drive of the gear transition connection (28).

8. A range hood, comprising a housing (6) and a smoke collecting chamber (7), wherein a flap (71) is provided on the smoke collecting chamber (7), characterized in that: It also comprises a driving device according to any one of claims 1 to 7, the transmission assembly (2) is fixedly connected to the smoke collecting chamber (7), the smoke collecting chamber (7) is directly or indirectly connected to the driving member (1), the driving member (1) is connected to the housing (6), and the swing driving part (21) can push the flap (71) to open so as to open the air inlet of the smoke collecting chamber (7).

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