Range hood

Abstract

The utility model relates to the technical field of household appliances discloses a range hood, include: shell, smoke machine main part, elevating system, elevating system includes: drive component, install on the shell, have power output shaft, transmission component, including driving sprocket and driven sprocket and chain, driving sprocket is connected with power output shaft, driven sprocket rotatably connects on the shell, chain is fixedly connected with smoke machine main part, drive component drives driving sprocket rotation through power output shaft, and then drive chain rotates around driving sprocket and driven sprocket, to drive smoke machine main part moves up and down. Transmission component passes through the structural form of adopting sprocket and chain, and the manufacturing precision requirement is relatively lower, and the processing and installation cost are lower, and sprocket chain drive can work in high temperature, dusty, humid, oil dirt and other harsh environment, and it is more suitable to use on the range hood, and it is not easy to produce noise and wear and tear in the transmission process, and the user experience is better.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a range hood. Background Technology

[0002] Currently, kitchen exhaust systems in homes are typically handled by range hoods. Installed above the cooktop, these hoods quickly remove combustion waste and cooking fumes, reducing pollution. Generally, the closer the range hood is to the cooktop, the better for efficient fume removal. However, installing it too close can obstruct the user's view and increase the risk of bumping their head. When using specialized cooktops like multi-tiered steamers, the greater height necessitates installing the range hood at a higher position; otherwise, it will interfere with the cooktop's operation.

[0003] However, in the existing technology, most range hoods are fixedly installed above the kitchen stove and cannot be raised or lowered. Although a small number of range hoods adopt a raised or lowered design, they use a gear and rack as a transmission mechanism. However, once the gear and rack transmission is damaged, the repair cost is high, and it requires high installation precision, which also increases the processing and installation costs. In addition, gear and rack transmissions usually require good lubrication and a clean environment, otherwise they are prone to noise and wear. Utility Model Content

[0004] In view of this, the present invention provides a range hood to solve the problems of high maintenance, processing and installation costs, noise and wear of existing height-adjustable range hoods.

[0005] This utility model provides a range hood, including: shell; The main body of the range hood is height-adjustable and can be installed inside the outer casing; The lifting mechanism is located between the outer casing and the main body of the range hood, and is suitable for driving the main body of the range hood to extend out of the outer casing or retract into the outer casing; The lifting mechanism includes: The drive component, mounted on the housing, has a power output shaft; The transmission components include a drive sprocket and a driven sprocket arranged at intervals, and a chain sleeved around the drive sprocket and the driven sprocket; The drive sprocket is connected to the power output shaft, the driven sprocket is rotatably connected to the outer casing, the chain is fixedly connected to the main body of the range hood, and the drive component drives the drive sprocket to rotate through the power output shaft, thereby driving the chain to rotate around the drive sprocket and the driven chain, thus driving the main body of the range hood to move up and down.

[0006] Beneficial effects: The lifting mechanism allows the range hood body to move up and down, extending out of or retracting into the outer casing, adapting to cooktops of different heights and efficiently absorbing cooking fumes. Furthermore, the transmission components utilize a structure with vertically spaced drive and driven sprockets, and a chain fitted around them. This ensures stable and smooth lifting speeds, and the manufacturing precision requirements for the sprockets and chain are relatively low, resulting in lower processing and installation costs compared to rack and pinion drives. Moreover, sprocket and chain drives can operate in harsh environments such as high temperatures, dust, humidity, and oil stains. Compared to rack and pinion drives, they are less prone to noise and wear, making them more suitable for range hoods. This effectively solves the problems of high maintenance, processing, and installation costs, as well as noise and wear issues associated with existing liftable range hoods.

[0007] In one alternative embodiment, the transmission components are in two sets, which are respectively arranged on opposite sides of the main body of the smoke machine.

[0008] Beneficial effects: By setting two sets of transmission components on opposite sides of the main body of the range hood, the balance and stability of the main body of the range hood during the lifting and lowering process can be improved.

[0009] In one alternative implementation, the power output shaft is fixedly connected to two drive sprockets of both sets of transmission components.

[0010] Beneficial effects: By fixing a power output shaft to two drive sprockets of two sets of transmission components simultaneously, it is possible to drive two drive sprockets to move synchronously using the same drive component. This not only saves drive costs but also ensures the synchronicity and consistency of the movement of the two sets of transmission components on the left and right sides, thereby improving the balance and stability of the entire smoke machine body during the lifting process.

[0011] In one optional embodiment, the transmission component further includes: The fastener is U-shaped and is fitted onto the chain, where it is fixed together. The end of the fastener is fixedly connected to the main body of the smoke machine.

[0012] Beneficial effects: By using U-shaped fasteners to connect and fix the chain and the main body of the smoke machine to achieve lifting, the size is relatively small and the structure is simple. The U-shaped fasteners are first clamped onto the chain and then fixed, resulting in a compact structure, reliable fixation, and convenient assembly.

[0013] In one alternative implementation, when there are two sets of transmission components, the fixing points of the two sets of transmission components and the fixing points of the main body of the smoke machine are located on the same horizontal plane. Beneficial effects: By setting the two sets of transmission components and the fixing points of the main body of the range hood on the same horizontal plane, the main body of the range hood can be balanced in terms of force, further ensuring the balance and stability of the main body of the range hood during movement.

[0014] In one alternative embodiment, the drive component is mounted and fixed to the outside of the housing; The housing is provided with a first connection hole, which allows the power output shaft to extend into the housing.

[0015] Beneficial effects: By mounting the drive components on the outside of the housing, it does not occupy internal space, improving space utilization and reducing the impact on the overall size of the range hood. The first connecting hole facilitates the insertion of the power output shaft into the housing to connect with the drive sprocket.

[0016] In one alternative embodiment, the housing is provided with a second connection hole, and the driven sprocket is rotatably connected to the second connection hole; The first connecting hole is located above the second connecting hole, and the two are on the same vertical line.

[0017] Beneficial effects: The second connecting hole on the outer casing facilitates the connection of the driven sprocket. Furthermore, the first and second connecting holes are located on the same vertical line, ensuring that the driving and driven sprockets are also on the same vertical line, thus ensuring that the main body of the smoke hood moves vertically up and down in a straight line under the drive of the transmission components.

[0018] In one alternative implementation, the driving component includes: Drive motor; The drive gear is connected to the drive motor; Driven gear, meshing with driven gear, driven gear is fixedly connected to power output shaft; The mounting housing houses the drive motor, the driving gear, and the driven gear. The mounting housing is then connected and fixed to the outer shell. Beneficial effects: By employing a multi-stage transmission system consisting of a drive motor, drive gear, driven gear, sprocket, and chain, the stability of the range hood's main body during lifting and lowering is improved. Furthermore, by mounting the drive motor, drive gear, and driven gear all within the mounting housing, the installation of the drive components is convenient. This also allows for concealed installation of the drive motor, drive gear, and driven gear, improving aesthetics and preventing dust accumulation on these components, which could affect driving performance and hinder cleaning.

[0019] In one optional embodiment, a guide structure is provided inside the outer casing, and a guide fitting structure is provided on the main body of the range hood; The guide structure and the guide mating structure slide together, and the guide structure extends vertically to guide the main body of the smoke machine to move up and down vertically.

[0020] Beneficial effects: The guide structure and guide cooperation structure can guide the main body of the range hood to move smoothly up and down, ensuring that the main body of the range hood remains in a straight line in the vertical direction during the lifting and lowering process, and there will be no deviation.

[0021] In one optional embodiment, the guiding structure includes a guide post fixedly disposed within the housing, and the guiding mating structure includes a guide sleeve fixedly disposed on the main body of the smoke hood, with the guide post slidably mated within the guide sleeve.

[0022] Beneficial effects: The guide structure and guide mating structure adopt the form of guide sleeve and guide post, which are simple in structure, easy to process and form, and have stable mating and better guiding effect. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the range hood in the rising and retracting state in an embodiment of this utility model; Figure 2 This is a schematic diagram of the range hood in the lowered and extended state in an embodiment of this utility model; Figure 3 This is a disassembly diagram of the main body and outer shell of the range hood in this embodiment of the present utility model; Figure 4 for Figure 3 Side view; Figure 5 for Figure 3 The diagram shows another angle of the range hood (with the drive components disassembled).

[0025] Explanation of reference numerals in the attached figures: 1. Outer shell; 101. First connecting hole; 102. Second connecting hole; 11. Guide structure; 2. Main body of the range hood; 21. Guide and fitting structure; 3. Lifting mechanism; 31. Drive component; 311. Power output shaft; 312. Drive motor; 313. Drive gear; 314. Driven gear; 315. Mounting housing; 32. Transmission components; 321. Drive sprocket; 322. Driven sprocket; 3221. Sprocket shaft; 323. Chain; 324. Fixing components. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0031] According to an embodiment of the present invention, in one aspect, the present invention provides a range hood, including a housing 1, a range hood body 2, and a lifting mechanism 3. The range hood body 2 is vertically and vertically disposed inside the housing 1, and the lifting mechanism 3 is disposed between the housing 1 and the range hood body 2, and is suitable for driving the range hood body 2 to extend out of the housing 1 or retract inside the housing 1. The lifting mechanism 3 includes a drive component 31 and a transmission component 32. The drive component 31 is mounted on the outer casing 1 and has a power output shaft 311. The transmission component 32 includes a drive sprocket 321 and a driven sprocket 322 arranged at intervals, and a chain 323 sleeved on the drive sprocket 321 and the driven sprocket 322. The drive sprocket 321 is connected to the power output shaft 311, the driven sprocket 322 is rotatably connected to the outer casing 1, and the chain 323 is fixedly connected to the main body 2 of the range hood. The drive component 31 drives the drive sprocket 321 to rotate through the power output shaft 311, thereby driving the chain 323 to rotate around the drive sprocket 321 and the driven chain 323, thereby driving the main body 2 of the range hood to move up and down to extend out of the outer casing 1 or retract into the outer casing 1.

[0032] In the above embodiment, the lifting mechanism 3 can drive the main body 2 of the range hood to move up and down, so as to extend out of the outer shell 1 or retract into the outer shell 1, which can adapt to stoves of different heights and efficiently absorb oil fumes. Furthermore, the transmission component 32 adopts a structure with an upper and lower spaced drive sprocket 321 and a driven sprocket 322, and a chain 323 sleeved on the drive sprocket 321 and the driven sprocket 322. Not only is the lifting speed stable and smooth, but the manufacturing precision requirements of the sprocket and chain are relatively low, and the processing and installation costs are lower than those of gear and rack transmission. In addition, the sprocket and chain transmission can work in harsh environments such as high temperature, dust, humidity, and oil stains. Compared with gear and rack transmission, it is less likely to generate noise and wear, and is more suitable for use in range hoods. It effectively solves the problems of high maintenance, processing, and installation costs, and easy generation of noise and wear in existing liftable range hoods.

[0033] Based on the above embodiments, as a further defined embodiment, both the driving sprocket 321 and the driven sprocket 322 mesh with the chain 323. The chain 323 connects the driving sprocket 321 and the driven sprocket 322 by meshing with the teeth on the driving sprocket 321 and the driven sprocket 322.

[0034] In one alternative embodiment, the transmission component 32 has two sets, and the two sets of transmission components 32 are respectively arranged on opposite sides of the smoke machine body 2.

[0035] In the above embodiment, by providing two sets of transmission components 32 on opposite sides of the main body 2 of the smoke hood, the balance and stability of the main body 2 of the smoke hood during the lifting and lowering process can be improved.

[0036] Based on the above implementation method, as a further defined implementation method, two sets of transmission components 32 are arranged on the left and right sides of the main body 2 of the smoke machine.

[0037] As an alternative implementation, the transmission component 32 may also be provided in only one set. When the transmission component 32 is provided in one set, the transmission component 32 is located in the middle part of the smoke machine body 2.

[0038] As an alternative implementation, the transmission components 32 can also be provided in three or four sets. When the transmission components 32 are provided in three sets, the three sets of transmission components 32 are distributed on the left, right and rear sides of the main body 2 of the range hood. When the transmission components 32 are provided in four sets, the four sets of transmission components 32 are distributed on the four sides of the main body 2 of the range hood.

[0039] In one alternative embodiment, the power output shaft 311 is simultaneously fixedly connected to two drive sprockets 321 of the two sets of transmission components 32.

[0040] In the above embodiment, by fixing a power output shaft 311 to the two drive sprockets 321 of the two sets of transmission components 32, it is possible to drive the two drive sprockets 321 to move synchronously using the same drive component 31. This not only saves drive costs, but also ensures the synchronicity and consistency of the movement of the two sets of transmission components 32 on the left and right sides, thereby improving the balance and stability of the entire smoke machine body 2 during the lifting process.

[0041] Based on the above-described embodiment, as a further defined embodiment, the length of the power output shaft 311 is greater than the lateral width of the range hood body 2. The power output shaft 311 spans above the range hood body 2, and the range hood body 2 is suspended below the power output shaft 311 by sprockets and chains. By placing the power output shaft 311 above the range hood body 2, the layout of the internal structure of the range hood body 2 is not affected, facilitating installation.

[0042] In one optional embodiment, the transmission component 32 further includes a fixing member 324, which is U-shaped and is fitted onto the chain 323 and fixedly integrated with the chain 323. The end of the fixing member 324 is fixedly connected to the main body 2 of the smoke machine.

[0043] In the above embodiment, the chain 323 and the main body 2 of the smoke machine are connected and fixed by using a U-shaped fastener 324 to achieve lifting. The size is relatively small and the structure is simple. The U-shaped fastener 324 is first clamped onto the chain 323 and then fixed, resulting in a compact structure, reliable fixation, and convenient assembly.

[0044] Based on the above embodiments, as a further defined embodiment, the U-shaped fastener 324 is welded, glued, or screwed to the chain 323 and the main body 2 of the range hood. Preferably, the U-shaped fastener 324 is welded to the chain 323 and the main body 2 of the range hood respectively.

[0045] Based on the above embodiments, as a further defined embodiment, the U-shaped fastener 324 includes two opposing fastening walls, the distance between which matches the thickness of the chain 323. The inner surfaces of the two fastening walls are welded to the chain 323. The end faces of the two fastening walls are welded to the main body 2 of the range hood.

[0046] In one alternative embodiment, when the transmission component 32 has two sets, the fixing points of the two sets of transmission components 32 and the fixing points of the main body 2 of the smoke machine are located on the same horizontal plane. In the above embodiment, by setting the two sets of transmission components 32 and the fixing point of the range hood body 2 on the same horizontal plane, the force on the range hood body 2 can be balanced, further ensuring the balance and stability of the range hood body 2 during movement.

[0047] In one alternative embodiment, the drive component 31 is mounted and fixed on the outside of the housing 1; the housing 1 is provided with a first connection hole 101, which allows the power output shaft 311 to extend into the housing 1.

[0048] In the above embodiment, by installing the drive component 31 on the outside of the housing 1, the internal space of the housing 1 is not occupied, thereby improving space utilization and reducing the impact on the volume of the main body 2 of the range hood. The first connecting hole 101 facilitates the insertion of the power output shaft 311 into the housing 1 to connect with the drive sprocket 321.

[0049] Based on the above embodiments, as a further defined embodiment, the drive component 31 is mounted and fixed on the side wall of the housing 1, more specifically, the drive component 31 is mounted and fixed at the top position of the side wall of the housing 1.

[0050] Based on the above embodiment, as a further defined embodiment, the power output shaft 311 is rotatably connected to the first connecting hole 101 via a bearing. There are two sets of first connecting holes 101, each set located on one of the two opposite sidewalls of the housing 1, specifically on the first and second sidewalls of the housing 1. The length of the power output shaft 311 is greater than the width between the two opposite sidewalls of the housing 1. One end of the power output shaft 311 is connected to the drive motor 312, and the other end passes sequentially through the first connecting hole 101 on the first sidewall, and after being sequentially connected to the drive sprockets 321 of the two sets of transmission components 32, it is rotatably connected to the first connecting hole 101 on the second sidewall. Both ends of the power output shaft 311 are respectively connected to the two first connecting holes 101 on the first and second sidewalls via bearings.

[0051] In one optional embodiment, the outer casing 1 is provided with a second connection hole 102, and the driven sprocket 322 is rotatably connected to the second connection hole 102; the first connection hole 101 is located above the second connection hole 102, and the two are located on the same vertical line.

[0052] In the above embodiment, the driven sprocket 322 is conveniently connected via the second connecting hole 102 provided on the outer casing 1. Furthermore, the first connecting hole 101 and the second connecting hole 102 are located on the same vertical line, ensuring that the driving sprocket 321 and the driven sprocket 322 are on the same vertical line, thereby ensuring that the main body 2 of the range hood moves vertically up and down in a straight line under the drive of the transmission component 32.

[0053] Based on the above embodiments, as a further defined embodiment, a sprocket shaft 3221 is fixedly provided at the center of the driven sprocket 322, and the sprocket shaft 3221 is rotatably connected to the second connecting hole 102 through a bearing.

[0054] In one optional embodiment, the drive component 31 includes: a drive motor 312, a drive gear 313, a driven gear 314, and a mounting housing 315. The drive gear 313 is connected to the drive motor 312. The driven gears 314 mesh with each other and are fixedly connected to the power output shaft 311. The drive motor 312, the drive gear 313, and the driven gear 314 are all installed in the mounting housing 315, and the mounting housing 315 is connected and fixed to the outer casing 1. In the above embodiment, the stability of the main body 2 of the range hood is improved by using a multi-stage transmission of drive motor 312-drive gear 313-driven gear 314-sprocket-chain 323. Furthermore, by installing drive motor 312, drive gear 313, and driven gear 314 all within the mounting housing 315, the installation of the drive component 31 is convenient. This also allows for concealed installation of drive motor 312, drive gear 313, and driven gear 314, improving aesthetics and preventing dust accumulation on these components, which could affect driving performance and make cleaning difficult.

[0055] Based on the above embodiments, as a further defined embodiment, the output shaft of the drive motor 312 is fixedly connected to the driving gear 313, the driving gear 313 meshes with the driven gear 314, and the center hole of the driven gear 314 is interference-fitted with the power output shaft 311, with an upper limit fit in the circumferential direction to achieve synchronous rotation of the two. Specifically, the center hole of the driven gear 314 and the outer periphery of the power output shaft 311 are provided with a limit protrusion on one side and a limit groove on the other side.

[0056] In this embodiment, the output shaft of the drive motor 312 is connected to the drive gear 313, which meshes with the driven gear 314. The driven gear 314 is connected to the drive sprockets 321 of the two sets of transmission components 32 via the power output shaft 311. Specifically, the power output shaft 311 is simultaneously connected to the left drive sprocket 321 and the right drive sprocket 321. The left drive sprocket 321 drives the first driven sprocket to rotate via the left chain 323, and the right drive sprocket 321 drives the right driven sprocket 322 to rotate via the right chain 323. A fixing member 324 is fixedly provided at the set position of the left chain 323 and connected to the range hood body 2. The rotation of the drive motor 312 drives the range hood body 2 to rise and fall. Compared with traditional range hoods, the range hood provided in this embodiment can adapt to stoves of different heights, efficiently absorb oil fumes, and drive the range hood body 2 to rise and fall through the sprocket and chain transmission. The rising and falling speed is stable and smooth, and the cost is low.

[0057] In one optional embodiment, a guide structure 11 is provided inside the outer casing 1, and a guide engagement structure 21 is provided on the main body 2 of the range hood; the guide structure 11 and the guide engagement structure 21 are slidably engaged, and the guide structure 11 extends in the vertical direction to guide the main body 2 of the range hood to move up and down in the vertical direction.

[0058] In the above embodiments, the guide structure 11 and the guide cooperation structure 21 can guide the main body 2 of the range hood to move smoothly up and down, ensuring that the main body 2 of the range hood remains in a straight line in the vertical direction during the up and down process and will not deviate.

[0059] In one optional embodiment, the guide structure 11 includes a guide post fixedly disposed within the housing 1, and the guide mating structure 21 includes a guide sleeve fixedly disposed on the main body 2 of the smoke hood, with the guide post slidably mated within the guide sleeve.

[0060] In the above embodiments, the guide structure 11 and the guide mating structure 21 adopt the form of guide sleeve and guide post, which have simple structure, are easy to process and form, and have stable mating and better guiding effect.

[0061] Based on the above embodiments, as a further defined embodiment, there are multiple guide sleeves, which are spaced apart circumferentially along the main body 2 of the range hood, and multiple guide posts are correspondingly provided. Preferably, there are four guide sleeves, which are distributed around the main body 2 of the range hood, and the guide posts are correspondingly provided at the four corners of the outer casing 1. The specific structure, assembly method, and working principle of the range hood in this embodiment will be described below with reference to the accompanying drawings.

[0062] like Figures 1 to 5 As shown, the range hood provided in this embodiment includes: a housing 1, a range hood body 2, and a lifting mechanism 3. The lifting mechanism 3 includes a drive component 31 and two sets of transmission components 32. The drive component 31 includes a drive motor 312, a power output shaft 311, a drive gear 313, a driven gear 314, and a mounting shell 315. The two sets of transmission components 32 are arranged on the left and right sides of the range hood body 2. The transmission component 32 on the left side includes a first drive sprocket, a first driven sprocket, a first chain, and a first fixing member. The transmission component 32 on the right side includes a second drive sprocket, a second driven sprocket, a second chain, and a second fixing member. The power output shaft 311 is fixedly connected to the housing 1 through a left bearing (not shown in the figure) and a right bearing (not shown in the figure). When the drive motor 312 rotates, it drives the power output shaft 311 to rotate, which in turn drives the drive gear 313 to rotate. The driven gear 314 meshes with the drive gear 313, so the drive motor 312 can control the rotation of the driven gear 314. Driven gear 314 is fixedly connected to power output shaft 311, which is fixedly connected to housing 1 via left and right bearings. Therefore, drive motor 312 can control the rotation of power output shaft 311. First drive sprocket and second drive sprocket are fixedly connected to power output shaft 311, with their fixed positions inside housing 1. First drive sprocket and first driven sprocket mesh with the first chain, and second drive sprocket and second driven sprocket mesh with the second chain. First driven sprocket is rotatably connected to housing 1 via bearings, and second driven sprocket is rotatably connected to housing 1 via sprocket shaft 3221. Therefore, rotation of drive motor 312 can drive the first and second chains to rotate.

[0063] Furthermore, such as Figures 3 to 5As shown, the positions of the first fixing member on the first chain and the second fixing member on the second chain determine the range of height adjustment of the range hood. The first fixing member can be welded to the first chain or fixed to the first chain by screws or other methods, ensuring its secure attachment to the first chain. The first fixing member can also be welded to the left side of the range hood body 2 or fixed to the left side of the range hood body 2 by screws or other methods, ensuring its secure attachment to the left side of the range hood body 2. When the chain 323 is in motion, it drives the connecting member to rise and fall, thereby driving the range hood body 2 to rise and fall.

[0064] Furthermore, such as Figure 5 As shown, the first and second fixing members should be at the same horizontal position. Therefore, the fixing points of the first fixing member, the first chain, and the left side of the range hood body 2, and the fixing points of the second fixing member, the second chain, and the right side of the range hood body 2 should also be at the same horizontal position. Thus, the drive motor 312 rotates, driving the first and second chains to move, thereby causing the range hood body 2 to move vertically.

[0065] Furthermore, guide sleeves are fixed at four positions on the left and right sides of the range hood body 2. These guide sleeves can be welded to the range hood body 2 or fixed to it using screws or other methods, ensuring a secure connection. The guide sleeves are hollow along the axial direction, with a circular or square cross-sectional shape. Four guide posts are fixed to the top inner side of the outer casing 1, corresponding one-to-one with the positions of the four guide sleeves on the range hood body 2. The guide posts have a circular cross-sectional shape. If the hollow cross-section inside the guide sleeve is circular, the diameter of the guide post should be slightly smaller than the diameter of the hollow cross-section inside the guide sleeve; if the hollow cross-section inside the guide sleeve is square, the diameter of the guide post should be slightly smaller than the side length of the hollow cross-section inside the guide sleeve. Therefore, when the range hood moves vertically up and down, the four guide posts on the outer casing 1 should penetrate into the guide sleeves on the range hood body 2 and move up and down along the axial direction of the guide sleeves. The guide sleeves and guide posts ensure that the range hood body 2 can move smoothly up and down. Optionally, the guide sleeve can also be configured with a chain structure to reduce friction of the guide post inside the positioning sleeve.

[0066] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the protection scope of the embodiments of this application.

Claims

1. A range hood, characterized in that, include: Outer shell (1); The main body (2) of the range hood is vertically and flexibly installed inside the outer casing (1); A lifting mechanism (3) is disposed between the outer casing (1) and the main body of the range hood (2), and the lifting mechanism (3) includes: The drive unit (31) is mounted on the housing (1) and has a power output shaft (311). The transmission component (32) includes a drive sprocket (321) and a driven sprocket (322) spaced apart vertically, and a chain (323) sleeved on the drive sprocket (321) and the driven sprocket (322). The drive sprocket (321) is connected to the power output shaft (311), the driven sprocket (322) is rotatably connected to the outer casing (1), the chain (323) is fixedly connected to the main body of the smoke hood (2), the drive component (31) drives the drive sprocket (321) to rotate through the power output shaft (311), thereby driving the chain (323) to rotate around the drive sprocket (321) and the driven chain (323), thereby driving the main body of the smoke hood (2) to move up and down.

2. The range hood according to claim 1, characterized in that, The transmission component (32) has two sets, and the two sets of transmission components (32) are respectively arranged on opposite sides of the main body (2) of the smoke machine.

3. The range hood according to claim 2, characterized in that, The power output shaft (311) is fixedly connected to the two drive sprockets (321) of the two sets of transmission components (32).

4. The range hood according to any one of claims 1 to 3, characterized in that, The transmission component (32) further includes: The fastener (324) is U-shaped. The fastener (324) is fitted onto the chain (323) and fixed together with the chain (323). The end of the fastener (324) is fixedly connected to the main body (2) of the smoke machine.

5. The range hood according to claim 4, characterized in that, When the transmission component (32) has two sets, the fixing points (324) of the two sets of transmission components (32) and the fixing points of the main body (2) of the smoke machine are located on the same horizontal plane.

6. The range hood according to any one of claims 1 to 3, characterized in that, The drive component (31) is mounted and fixed on the outside of the housing (1); The housing (1) is provided with a first connection hole (101), which allows the power output shaft (311) to extend into the housing (1).

7. The range hood according to claim 6, characterized in that, The outer casing (1) is provided with a second connection hole (102), and the driven sprocket (322) is rotatably connected to the second connection hole (102). The first connecting hole (101) is located above the second connecting hole (102), and the two are located on the same vertical line.

8. The range hood according to any one of claims 1 to 3, characterized in that, The driving component (31) includes: Drive motor (312); The drive gear (313) is connected to the drive motor (312); Driven gear (314), meshing with the driven gear (314), the driven gear (314) being fixedly connected to the power output shaft (311); The drive motor (312), the driving gear (313), and the driven gear (314) are all installed in the mounting housing (315), and the mounting housing (315) is connected and fixed to the outer shell (1).

9. The range hood according to any one of claims 1 to 3, characterized in that, A guide structure (11) is provided inside the outer shell (1), and a guide fitting structure (21) is provided on the main body (2) of the smoke machine. The guide structure (11) slides with the guide mating structure (21), and the guide structure (11) extends in the vertical direction to guide the main body of the smoke machine (2) to move up and down in the vertical direction.

10. The range hood according to claim 9, characterized in that, The guide structure (11) includes a guide post fixedly installed inside the outer shell (1), and the guide fitting structure (21) includes a guide sleeve fixedly installed on the main body (2) of the smoke machine, with the guide post slidingly fitted inside the guide sleeve.

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