Lifting drive structure and lifting range hood

Abstract

The application belongs to the technical field of range hood, and particularly relates to a lifting driving structure and a lifting range hood. The lifting driving structure comprises a driving member and a cover shell; the driving member comprises a sleeve and a piston rod, the piston rod is connected with the sleeve, and the piston rod can be extended and retracted relative to the sleeve in the vertical direction; the cover shell is connected with one end of the piston rod away from the sleeve; when the piston rod is extended and retracted relative to the sleeve, at least part of the cover shell is covered between the piston rod and the sleeve. The lifting driving structure and the lifting range hood provided by the application can solve the problem that oil stains are attached to the lifting driving structure, causing jamming, wear and even failure, and improve the lifting effect of the range hood.

Description

Technical Field

[0001] This application belongs to the field of range hood technology, specifically relating to a lifting drive structure and a lifting range hood. Background Technology

[0002] Lift-type range hoods have lifting capabilities, and their core function is to adjust the air pressure at the smoke inlet by lifting, thereby flexibly adapting to different cooking conditions.

[0003] A typical range hood with lift mechanism consists of three parts: a smoke collection hood, a main housing, and a lifting drive structure. The smoke inlet is located in the smoke collection hood, which is connected to the main housing. Driven by the lifting drive structure, the smoke collection hood can move up and down relative to the main housing, effectively capturing cooking fumes. In existing range hood designs, to maximize space utilization and reduce duct compression, the lifting drive structure is often located inside the main housing.

[0004] However, the lifting drive structure is directly exposed to the oil fume environment. After long-term use, oil stains will adhere to it, which will cause jamming, wear and even failure, affecting the lifting effect of the range hood. Utility Model Content

[0005] This application provides a lifting drive structure and a lifting range hood to solve the problem of oil stains adhering to the lifting drive structure, causing jamming, wear and even failure, and to improve the lifting effect of the range hood.

[0006] In a first aspect, embodiments of this application provide a lifting drive structure, including a drive component and a housing;

[0007] The driving component includes a sleeve and a piston rod, the piston rod being connected to the sleeve, and the piston rod being extendable and retractable relative to the sleeve in a vertical direction;

[0008] The cover is connected to the end of the piston rod away from the sleeve; when the piston rod extends or retracts relative to the sleeve, at least a portion of the cover is disposed between the piston rod and the sleeve.

[0009] In one possible design, the housing includes a mounting portion and a sleeve portion connected together;

[0010] The mounting part is sleeved on the outer surface of the piston rod and fixed to the piston rod;

[0011] The sleeve is fitted onto the outer surface of the sleeve, and when the piston rod extends or retracts relative to the sleeve, the sleeve slides in contact with the sleeve.

[0012] In one possible design, the outer wall of the mounting portion is provided with a first oil guiding portion, the first oil guiding portion having an oil guiding slope, the first end of the oil guiding slope being connected to the outer wall of the sleeve portion, and the second end of the oil guiding slope being connected to the outer wall of the mounting portion.

[0013] In one possible design, the outer wall of the mounting part is provided with an oil guide groove that communicates with the inner side of the mounting part, and the oil guide groove is located at the end of the mounting part away from the sleeve part.

[0014] In one possible design, the inner wall of the sleeve is provided with a protrusion, the protrusion extending in a direction parallel to the vertical direction, and the protrusion slidingly contacting the sleeve.

[0015] In one possible design, the housing comprises a first housing and a second housing connected together;

[0016] The first housing and the second housing can be configured to form a cavity for accommodating the piston rod and the sleeve.

[0017] In one possible design, one of the first housing and the second housing is provided with a buckle, and the other is provided with a protrusion, the buckle being connected to the protrusion.

[0018] In one possible design, the drive unit further includes a motor connected to the piston rod, the motor being used to drive the piston rod to extend or retract relative to the sleeve.

[0019] In one possible design, the motor is fitted with an oil-proof shell, and a second oil guide is provided at the bottom of the outer side of the oil-proof shell. The second oil guide is inclined toward the rear panel of the main body of the range hood.

[0020] Secondly, embodiments of this application provide a lifting smoke hood, including a main housing, a smoke collection hood, and any of the above-mentioned lifting drive structures;

[0021] The main housing and the smoke collection hood are connected, and the lifting drive structure is located inside the main housing and the smoke collection hood;

[0022] The end of the sleeve away from the piston rod is connected to the main housing, and the end of the piston rod away from the sleeve is connected to the smoke collection hood;

[0023] When the piston rod extends or retracts relative to the sleeve, it can drive the smoke collection hood to rise or fall relative to the main body.

[0024] The lifting drive structure and lifting range hood provided in this application include a drive component and a cover. The drive component includes a sleeve and a piston rod, with the piston rod connected to the sleeve and capable of extending and retracting relative to the sleeve in a vertical direction. The cover is connected to the end of the piston rod away from the sleeve. When the piston rod extends and retracts relative to the sleeve, at least a portion of the cover is positioned between the piston rod and the sleeve. The cover provides protection for the piston rod. Since the cover is connected to the piston rod, it can move up and down with the piston rod during extension and retraction. Because at least a portion of the cover is positioned between the piston rod and the sleeve, the cover can always cover critical parts during piston rod extension and retraction, providing continuous protection. This helps prevent oil fumes and dust from adhering to the piston rod surface, ensuring the cleanliness and safety of the drive component under different operating conditions. It solves the problem of oil stains adhering to the drive component, leading to jamming, wear, and even failure, thus improving the lifting effect of the range hood. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] Figure 1 This is a schematic diagram of the structure of the lifting smoke machine provided in the embodiment of this application;

[0027] Figure 2 for Figure 1 Schematic diagram of the internal structure of the main casing of the central lifting smoke hood;

[0028] Figure 3 This is a schematic diagram of the lifting drive structure provided in the embodiments of this application;

[0029] Figure 4 for Figure 3 A schematic diagram of the drive components of the lifting drive structure;

[0030] Figure 5 for Figure 3 A schematic diagram of the housing of the lifting drive structure;

[0031] Figure 6 for Figure 5 A schematic diagram of the structure of the first shell of the middle cover;

[0032] Figure 7 for Figure 5 A schematic diagram of the structure of the first shell of the middle cover;

[0033] Figure 8 for Figure 3 A schematic diagram of the connection structure between the housing of the lifting drive structure and the second connecting piece;

[0034] Figure 9 for Figure 3A schematic diagram of the oil-proof housing of the lifting drive structure.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100-Driver;

[0037] 110 - Sleeve; 111 - First connecting piece;

[0038] 120 - Piston rod; 121 - Second connecting piece;

[0039] 130 - Motor; 131 - Oil-proof housing; 1311 - Second oil guide section; 1312 - Wiring section;

[0040] 200 - Cover; 201 - First housing; 2011 - Buckle; 202 - Second housing; 2021 - Protrusion;

[0041] 210 - Installation section; 211 - First oil guide section; 212 - Oil guide groove;

[0042] 220 - Sleeve part; 221 - Protrusion part;

[0043] 300-main box;

[0044] 310 - Rear panel;

[0045] 400-Smoke hood.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0049] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0050] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0051] Unless otherwise stated, the term "multiple" means two or more.

[0052] As can be seen from the background technology, a lifting range hood typically consists of three parts: a smoke collection hood, a main housing, and a lifting drive structure. The smoke collection hood is equipped with a smoke inlet and is connected to the main housing. Under the action of the lifting structure, the smoke collection hood can move up and down relative to the main housing to adjust the height of the smoke inlet and achieve effective capture of oil fumes.

[0053] In related technologies, the back panel of the main body or smoke collection hood of some lifting range hoods is bent to form an independent receiving cavity. This receiving cavity is specifically used to install the lifting drive structure, ensuring the isolation of the lifting drive structure from the air duct inside the range hood.

[0054] However, the encroachment on the duct space reduces the effective space of the air duct, which may affect the smoke extraction efficiency of the range hood. Reduced duct space can obstruct the flow of fumes inside the range hood, slowing down the exhaust speed and consequently impacting the overall performance of the range hood.

[0055] To maximize space utilization and reduce airflow compression, the lifting drive structure can be directly installed inside the main housing. However, this lifting drive structure is directly exposed to the oil fume environment, and over time, oil stains will accumulate, leading to jamming, wear, and even failure, thus affecting the lifting effect of the range hood.

[0056] To address the aforementioned issues, this application provides a lifting drive structure and a lifting range hood. The lifting drive structure includes a drive component and a cover. The drive component includes a sleeve and a piston rod, which is connected to the sleeve and can extend and retract relative to the sleeve in a vertical direction. The cover is connected to the end of the piston rod away from the sleeve. When the piston rod extends and retracts relative to the sleeve, at least a portion of the cover is positioned between the piston rod and the sleeve.

[0057] The cover provides protection for the piston rod. Connected to the piston rod, the cover moves up and down with the piston rod during extension and retraction. At least part of the cover is positioned between the piston rod and the sleeve, ensuring continuous protection of critical areas during piston rod extension and retraction. This helps prevent oil fumes and dust from adhering to the piston rod surface, ensuring the cleanliness and safety of the drive components under different operating conditions. It solves the problem of oil stains adhering to the drive components, leading to jamming, wear, and even failure, thus improving the lifting and lowering effect of the range hood.

[0058] The technical solutions of this application and how they solve the aforementioned technical problems are described in detail below with specific embodiments. These specific embodiments may exist independently or in combination with each other. Identical or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0059] Combination Figure 1 and Figure 2 As shown, one embodiment of this application provides a liftable range hood, including a main housing 300. A smoke extraction fan (not shown in the figure) is provided inside the main housing 300, and the air inlet of the smoke extraction fan can face the front or rear side of the main housing 300.

[0060] When the air inlet of the exhaust fan faces the rear of the main housing 300, the fumes can be drawn in through the rear of the main housing 300; when the air inlet of the exhaust fan faces the front of the main housing 300, the fumes can be drawn in through the front of the main housing 300.

[0061] The range hood also includes a smoke collection hood 400. The smoke collection hood 400 is located below the main housing 300, and can partially overlap with the main housing 300. The smoke collection hood 400 has a smoke inlet chamber, which is connected to the air inlet of the exhaust fan. A smoke inlet is located at the bottom of the smoke inlet chamber, facing the cooktop.

[0062] When the range hood is started, the exhaust fan runs, creating a negative pressure at the smoke inlet to draw the cooking fumes from the stove into the smoke collection hood 400, and then into the main housing 300, so that they can be discharged from the exhaust fan outlet.

[0063] The lifting range hood also includes a lifting drive structure. This lifting drive structure is located inside the main housing 300 and the smoke collection hood 400. The lifting drive structure is connected to both the main housing 300 and the smoke collection hood 400. Under the action of the lifting drive structure, the smoke collection hood 400 can move up and down relative to the main housing 300 to adjust the height of the smoke inlet, thereby achieving effective capture of oil fumes.

[0064] Specifically, the lifting drive structure includes a drive component 100, which includes a sleeve 110 and a piston rod 120. The piston rod 120 is connected to the sleeve 110 and can extend and retract relative to the sleeve 110 in the vertical direction. The end of the sleeve 110 away from the piston rod 120 is connected to the main housing 300, and the end of the piston rod 120 away from the sleeve 110 is connected to the smoke hood 400. When the piston rod 120 extends and retracts relative to the sleeve 110, it can drive the smoke hood 400 to rise and fall relative to the main housing 300.

[0065] Understandably, the lifting drive structure is located inside the main housing 300 and the fume hood 400, directly exposed to the oil fume environment. The surface of the piston rod 120 may be covered with a large amount of oil and dust, affecting normal operation.

[0066] In some embodiments, the lifting drive structure further includes a cover 200, which is connected to the end of the piston rod 120 away from the sleeve 110; when the piston rod 120 extends or retracts relative to the sleeve 110, at least a portion of the cover 200 covers the space between the piston rod 120 and the sleeve 110.

[0067] The cover 200 provides protection for the piston rod 120. Since the cover 200 is connected to the piston rod 120, it can move up and down with the piston rod 120 during its extension and retraction. At least a portion of the cover 200 covers the area between the piston rod 120 and the sleeve 110, ensuring that the cover 200 always covers the critical areas (the outside of the piston rod 120 and the area between the piston rod 120 and the sleeve 110) during the extension and retraction of the piston rod 120. This provides continuous protection, helps prevent oil fumes and dust from adhering to the surface of the piston rod 120, ensures the cleanliness and safety of the drive component 100 under different operating conditions, solves the problem of oil stains adhering to the drive component 100, leading to jamming, wear, or even failure, and improves the lifting effect of the range hood.

[0068] Specifically, the end of the sleeve 110 away from the piston rod 120 can be connected to the main housing 300 through the first connecting member 111. The end of the sleeve 110 away from the piston rod 120 and the first connecting member 111 can be hinged to allow a certain amount of small adaptive rotation during the operation of the drive member 100.

[0069] The end of the piston rod 120 away from the sleeve 110 can be connected to the smoke hood 400 via the second connector 121. The second connector 121 can extend the length of the piston rod 120, so that the piston rod 120 can be effectively and stably connected to the smoke hood 400.

[0070] For example, the second connector 121 can be a connecting rod. When the second connector 121 is connected to the smoke hood 400, it can be adapted to the shape of the connecting part of the smoke hood 400 so that the piston rod 120 can be effectively and stably connected to the smoke hood 400.

[0071] Combination Figure 3 and Figure 4 As shown, another aspect of this application provides a lifting drive structure, including a drive member 100; the drive member 100 includes a sleeve 110 and a piston rod 120, the piston rod 120 is connected to the sleeve 110, and the piston rod 120 can extend and retract relative to the sleeve 110 in the vertical direction.

[0072] The extension and retraction of the piston rod 120 within the sleeve 110 can be driven by hydraulic or pneumatic pressure to provide powerful lifting force and precise control.

[0073] The end of the sleeve 110 away from the piston rod 120 can be connected to the main housing 300, and the end of the piston rod 120 away from the sleeve 110 can be connected to the fume hood 400. Through the extension and retraction of the piston rod 120 relative to the sleeve 110, the fume hood 400 can be moved closer to the stove when needed to improve the efficiency of capturing oil fumes, or moved away from the stove when not needed to increase space utilization.

[0074] The lifting drive structure also includes a cover 200, which is connected to the end of the piston rod 120 away from the sleeve 110; when the piston rod 120 extends or retracts relative to the sleeve 110, at least a portion of the cover 200 covers the space between the piston rod 120 and the sleeve 110.

[0075] Understandably, the housing 200 can provide protection for the piston rod 120, especially in oily fume environments. The housing 200 can effectively prevent oil and dust from directly adhering to the piston rod 120, reducing the impact of pollution on the drive structure.

[0076] By fixing the cover 200 to the distal end of the piston rod 120, the cover 200 can move with the movement of the piston rod 120. This arrangement ensures that the cover 200 can always cover the critical parts of the piston rod 120 throughout the entire extension and retraction process, providing continuous protection, reducing direct contact between the surface of the piston rod 120 and the external environment, and reducing the frequency of cleaning and maintenance.

[0077] When the piston rod 120 extends or retracts relative to the sleeve 110, at least a portion of the cover 200 is positioned between the piston rod 120 and the sleeve 110. This ensures that the cover 200 remains covering the area between the piston rod 120 and the sleeve 110 throughout the entire movement of the piston rod 120. This coverage not only protects the surface of the piston rod 120 but also the connection between the piston rod 120 and the sleeve 110, preventing the intrusion of oil fumes and dust, thereby preventing jamming, wear, or failure due to contamination.

[0078] Specifically, the lifting drive structure provided in this application embodiment, with its housing 200, not only protects the critical parts of the drive component 100 from oil and dust adhesion, but also ensures the normal operation of the drive component 100, reducing the risk of jamming, wear, or failure due to contamination. This enables the lifting drive structure to work effectively in oil fume environments, providing reliable lifting functionality.

[0079] In some embodiments, the housing 200 includes a mounting portion 210 and a sleeve portion 220 connected to each other; the mounting portion 210 is sleeved on the outer surface of the piston rod 120 and fixed to the piston rod 120; the sleeve portion 220 is sleeved on the outer surface of the sleeve 110, and when the piston rod 120 extends or retracts relative to the sleeve 110, the sleeve portion 220 slides in contact with the sleeve 110.

[0080] It should be noted that the inner diameter of the mounting part 210 is adapted to the outer diameter of the piston rod 120, and the inner diameter of the sleeve part 220 is adapted to the outer diameter of the sleeve 110.

[0081] By configuring the cover 200 with a structure having a mounting part 210 and a sleeve part 220, targeted protection can be provided at different parts of the drive member 100.

[0082] The fixed connection between the mounting part 210 and the piston rod 120 ensures that the cover 200 remains outside the piston rod 120 during the extension and retraction of the piston rod 120, providing continuous protection for the piston rod 120.

[0083] By providing the sleeve part 220, it can cover the outer surface of the sleeve 110 to form a protective barrier. The sleeve part 220 slides in contact with the sleeve 110, so that the sleeve part 220 can adjust its position with the movement of the piston rod 120, ensuring that the cover 200 always covers the key parts during the entire extension and retraction process. This can provide dynamic protection and prevent the protection from failing due to movement.

[0084] Combination Figure 5 and Figure 8As shown, in some embodiments, the outer wall of the mounting portion 210 is provided with a first oil guiding portion 211, the first oil guiding portion 211 has an oil guiding slope, the first end of the oil guiding slope is connected to the outer wall of the sleeve portion 220, and the second end of the oil guiding slope is connected to the outer wall of the mounting portion 210.

[0085] It is understandable that if the outer peripheral surface of the sleeve part 220 is larger than that of the mounting part 210, then the connection between the mounting part 210 and the sleeve part 220 has a stepped surface. When oil stains adhere to the stepped surface, they may drip directly downwards. Furthermore, the dripping oil droplets may cause oil stains to splatter under the action of the exhaust fan.

[0086] By providing a first oil guide 211 on the outer wall of the mounting part 210 and connecting it to the connection between the mounting part 210 and the sleeve part 220, the oil can be guided from the surface of the sleeve part 220 to the surface of the mounting part 210 by the action of gravity and surface tension, so as to be discharged from the bottom of the mounting part 210.

[0087] The oil guide slope helps the oil to flow smoothly along the slope, optimizing the flow path of the oil and guiding it to the surface of the mounting part 210, thus preventing the oil from accumulating at the connection between the mounting part 210 and the sleeve part 220.

[0088] By connecting the two ends of the oil guiding slope to the sleeve part 220 and the mounting part 210 respectively, a continuous oil guiding path is formed, ensuring that the oil guiding slope can effectively guide the oil from the sleeve part 220 to the mounting part 210.

[0089] Combination Figure 5 and Figure 8 As shown, in some embodiments, the outer wall of the mounting portion 210 is provided with an oil guide groove 212 that communicates with the inner side of the mounting portion 210, and the oil guide groove 212 is located at the end of the mounting portion 210 away from the sleeve portion 220.

[0090] Understandably, the end of the piston rod 120 away from the sleeve 110 can be connected to the smoke hood 400 via the second connector 121, and the mounting part 210 can be connected to the second connector 121. At least a portion of the second connector 121 can be inserted into the mounting part 210.

[0091] For example, the mounting part 210 can be connected to the second connector 121 by at least one of the screw structure, snap-fit ​​structure and plug-in structure, as long as a stable connection between the mounting part 210 and the second connector 121 can be achieved. This application embodiment does not impose any restrictions on this.

[0092] The oil guide groove 212 connects the inner and outer sides of the mounting part 210, so that the oil flowing through the surface of the mounting part 210 can enter the interior of the end of the mounting part 210 away from the sleeve part 220 through the oil guide groove 212, and continue to flow downward along the second connector 121. In this way, the oil can be guided and the oil can be prevented from accumulating and dripping between the mounting part 210 and the second mounting part.

[0093] By setting the oil guide groove 212 at the end away from the sleeve part 220, oil will not accumulate in the connection area between the sleeve part 220 and the mounting part 210, which facilitates the discharge of oil and reduces the pollution to the drive structure.

[0094] Combination Figure 5 As shown, in some embodiments, the inner wall of the sleeve portion 220 is provided with a protrusion 221, the extension direction of the protrusion 221 is parallel to the vertical direction, and the protrusion 221 slides in contact with the sleeve 110.

[0095] The protrusion 221 is provided on the inner wall of the sleeve 220. The sleeve 220 can slide in contact with the sleeve 110 through the protrusion 221. This can reduce the contact area between the inner wall of the sleeve 220 and the outer surface of the sleeve 110, improve the smoothness of the movement of the sleeve 220, reduce the friction and wear between the sleeve 220 and the sleeve 110, and ensure the stability of the movement.

[0096] Furthermore, the extension direction of the protrusion 221 is parallel to the vertical direction, that is, the extension direction of the protrusion 221 is consistent with the movement direction of the sleeve 220. The protrusion 221 can effectively guide and restrict the movement direction, ensuring that the movement of the sleeve 220 on the sleeve 110 is linear, and reducing lateral swaying and offset.

[0097] Combination Figure 6 and Figure 7 As shown, in some embodiments, the cover 200 includes a first housing 201 and a second housing 202 connected to each other, the first housing 201 and the second housing 202 being disposed opposite to each other, and the first housing 201 and the second housing 202 being able to form a cavity for accommodating the piston rod 120 and the sleeve 110.

[0098] By setting the housing 200 to a structure assembled from the first housing 201 and the second housing 202, the structural flexibility and operability of the housing 200 are increased, allowing the housing 200 to be assembled and disassembled more easily, and facilitating the maintenance and cleaning of the housing 200.

[0099] Furthermore, during maintenance, only the first housing 201 and the second housing 202 need to be removed, which allows the housing 200 to be disassembled without disassembling other components or with fewer other components, further improving the convenience of maintenance.

[0100] Furthermore, the separate first housing 201 and second housing 202 make the manufacturing and assembly of the casing 200 more modular. Each housing can be machined and processed individually, and then connected together during assembly, simplifying the production and maintenance process.

[0101] The first housing 201 and the second housing 202 are arranged opposite to each other, and the splicing surfaces of the first housing 201 and the second housing 202 abut against each other. The extension direction of the splicing surfaces is consistent with the axial direction of the piston rod 120. With this arrangement, the first housing 201 and the second housing 202 can be assembled to form a cavity for accommodating the piston rod 120 and the sleeve 110.

[0102] The enclosed cavity provides a sealed space to protect the piston rod 120 and sleeve 110 from external fumes and dust.

[0103] In some embodiments, a buckle 2011 is provided on one of the first housing 201 and the second housing 202, and a protrusion 2021 is provided on the other, with the buckle 2011 and the protrusion 2021 connected.

[0104] Understandably, snap-fit ​​2011 is typically used for quick connection and fixation of components. By setting snap-fit ​​2011 on a housing, its elasticity and locking function enable quick connection and fixation.

[0105] The 2021 latch is typically used in conjunction with the 2011 snap fastener. By setting the 2021 latch on another housing, a mating connection point can be formed, allowing the two housings to be securely joined together.

[0106] The connection between the clip 2011 and the protrusion 2021 utilizes a mechanical locking principle, achieving connection and fixation through the elastic deformation of the clip 2011. This connection method is simple and efficient, suitable for applications requiring frequent disassembly and assembly.

[0107] In this embodiment, the connection between the snap fastener 2011 and the protrusion 2021 provides a robust and detachable connection method, allowing the first housing 201 and the second housing 202 to be quickly separated or joined when needed. Thus, while ensuring the stability and reliability of the structure, it also simplifies the assembly and disassembly process of the cover 200, facilitating its maintenance and cleaning.

[0108] There are multiple snap-fit ​​2011 and snap-fit ​​2021, and each snap-fit ​​2011 and snap-fit ​​2021 corresponds to another snap-fit ​​2021. The multiple snap-fit ​​2011 and snap-fit ​​2021 are distributed at intervals along the axial direction of the piston rod 120. The multiple snap-fit ​​2011 and snap-fit ​​2021 can provide multiple connection points, thereby improving the installation stability of the first housing 201 and the second housing 202.

[0109] Combination Figure 3 and Figure 4 As shown, in some embodiments, the drive unit 100 further includes a motor 130, which is connected to the piston rod 120 and is used to drive the piston rod 120 to extend or retract relative to the sleeve 110.

[0110] Understandably, motor 130 provides an automated power source for the lifting drive structure, enabling the extension and retraction of piston rod 120 to be achieved electrically, thereby improving the automation level and ease of operation of the lifting drive structure.

[0111] Specifically, the motor 130 can be connected to the piston rod 120 through a transmission mechanism such as gears, connecting rods or threaded drives to convert the rotational motion of the motor 130 into the linear motion of the piston rod 120, thereby achieving precise extension and retraction control.

[0112] The motor 130, through its rotational motion and in conjunction with the transmission mechanism, converts the rotational motion into the linear extension and retraction motion of the piston rod 120, which can drive the piston rod 120 to extend and retract relative to the sleeve 110, thereby driving the smoke hood 400 to rise and fall relative to the main housing 300, thus realizing the lifting and lowering of the smoke hood.

[0113] Combination Figure 2 , Figure 3 and Figure 9 As shown, in some embodiments, an oil-proof shell 131 is provided on the outer side of the motor 130, and a second oil guide part 1311 is provided at the bottom of the outer side of the oil-proof shell 131. The second oil guide part 1311 is inclined towards the rear back plate 310 of the main body 300 of the range hood.

[0114] Understandably, the motor 130 is also located inside the main housing 300 and is directly exposed to the oil fume environment. In the oil fume environment, the motor 130 is easily corroded by oil stains, which affects its performance and lifespan. Therefore, the motor 130 also needs to be treated with oil protection.

[0115] The oil-proof shell 131 located on the outside of the motor 130 provides a protective barrier for the motor 130, preventing oil fumes and oil stains from directly contacting the surface of the motor 130, reducing the risk of pollution and corrosion, and helping to extend the service life and reliability of the motor 130.

[0116] Understandably, oil may accumulate on the surface of the oil-proof housing 131 and drip down.

[0117] By setting the second oil guide part 1311, the oil stains adhering to the surface of the oil-proof shell 131 can be guided to the back plate 310 of the main body 300 by the action of gravity and surface tension, so as to prevent the oil stains on the surface of the oil-proof shell 131 from splashing under the action of the exhaust fan, causing them to drip into the smoke collection hood 400 or even drip onto the stove.

[0118] Specifically, the second oil guiding part 1311 extends downward at one end of the oil-proof shell 131 to effectively guide the oil stains to the rear panel 310 of the main body 300 of the range hood by utilizing gravity, so as to ensure that the oil stains do not accumulate on the surface of the oil-proof shell 131.

[0119] In some embodiments, the surface of the oil-proof housing 131 is provided with a wiring portion 1312, and the wiring portion 1312 is provided with a wiring hole that connects the inner and outer sides of the oil-proof housing 131. The wiring of the motor 130 can be laid in the wiring hole to achieve oil protection of the wiring harness.

[0120] In summary, the lifting drive structure and lifting range hood provided in this application embodiment, by setting a cover 200 that can move synchronously with the piston rod 120, ensures that the cover 200 always covers the outside of the piston rod 120 during the extension and retraction of the piston rod 120, providing continuous protection and helping to prevent oil fumes and dust from adhering to the surface of the piston rod 120. Combined with the oil-proof shell 131 set on the outside of the motor 130, the oil-proof of the drive component 100 is fully realized, ensuring the cleanliness and safety of the drive component 100 under different working conditions. This solves the problem of oil stains adhering to the drive component 100, causing jamming, wear, or even failure, and improves the lifting effect of the range hood.

[0121] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lifting drive structure, characterized in that, Includes a drive unit (100) and a housing (200); The driving component (100) includes a sleeve (110) and a piston rod (120), the piston rod (120) being connected to the sleeve (110), and the piston rod (120) being extendable and retractable relative to the sleeve (110) in a vertical direction; The cover (200) is connected to the end of the piston rod (120) away from the sleeve (110); when the piston rod (120) extends or retracts relative to the sleeve (110), at least a portion of the cover (200) covers the piston rod (120) and the sleeve (110).

2. The lifting drive structure according to claim 1, characterized in that, The housing (200) includes a mounting portion (210) and a sleeve portion (220) connected to each other; The mounting part (210) is sleeved on the outer surface of the piston rod (120) and fixed to the piston rod (120); The sleeve portion (220) is sleeved on the outer surface of the sleeve (110). When the piston rod (120) extends or retracts relative to the sleeve (110), the sleeve portion (220) slides in contact with the sleeve (110).

3. The lifting drive structure according to claim 2, characterized in that, The outer wall of the mounting part (210) is provided with a first oil guiding part (211), the first oil guiding part (211) has an oil guiding slope, the first end of the oil guiding slope is connected to the outer wall of the sleeve part (220), and the second end of the oil guiding slope is connected to the outer wall of the mounting part (210).

4. The lifting drive structure according to claim 3, characterized in that, The outer wall of the mounting part (210) is provided with an oil guide groove (212) that communicates with the inner side of the mounting part (210). The oil guide groove (212) is located at the end of the mounting part (210) away from the sleeve part (220).

5. The lifting drive structure according to claim 2, characterized in that, The inner wall of the sleeve (220) is provided with a protrusion (221), the extension direction of the protrusion (221) is parallel to the vertical direction, and the protrusion (221) slides in contact with the sleeve (110).

6. The lifting drive structure according to any one of claims 1-5, characterized in that, The housing (200) includes a first housing (201) and a second housing (202) connected to each other; The first housing (201) and the second housing (202) can be configured to form a cavity for accommodating the piston rod (120) and the sleeve (110).

7. The lifting drive structure according to claim 6, characterized in that, One of the first housing (201) and the second housing (202) is provided with a buckle (2011) and the other is provided with a protrusion (2021), and the buckle (2011) is connected to the protrusion (2021).

8. The lifting drive structure according to any one of claims 1 to 5, characterized in that, The drive unit (100) also includes a motor (130) connected to the piston rod (120), and the motor (130) is used to drive the piston rod (120) to extend and retract relative to the sleeve (110).

9. The lifting drive structure according to claim 8, characterized in that, An oil-proof shell (131) is fitted on the outside of the motor (130). A second oil guide part (1311) is provided at the bottom of the outside of the oil-proof shell (131). The second oil guide part (1311) is inclined to the back plate (310) of the main body (300) of the smoke machine.

10. A lifting smoke machine, characterized in that, It includes a main housing (300), a smoke collection hood (400), and a lifting drive structure as described in any one of claims 1-9; The main housing (300) and the smoke hood (400) are connected, and the lifting drive structure is located inside the main housing (300) and the smoke hood (400); The end of the sleeve (110) away from the piston rod (120) is connected to the main housing (300), and the end of the piston rod (120) away from the sleeve (110) is connected to the smoke hood (400); When the piston rod (120) extends or retracts relative to the sleeve (110), it can drive the smoke hood (400) to rise or fall relative to the main box (300).

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