Linkage mechanism and range hood

Abstract

The utility model relates to the technical field of kitchen appliances, in particular to a linkage mechanism and a range hood. The linkage mechanism is used for connecting the upper baffle and the smoke inlet plate and comprises a sliding rail, a first linkage support and a second linkage support, and the sliding rail is arranged on the upper baffle; one end of the first linkage bracket is in sliding connection with the sliding rail; one end of a second linkage support is hinged to the other end of the first linkage support, the other end of the second linkage support is hinged to the bottom wall of the smoke collecting cavity, and the middle of the second linkage support is connected with a side plate on the side portion of the smoke inlet plate. According to the utility model, one fixed fulcrum of the linkage mechanism is replaced by the slide rail, so that the requirement of the linkage mechanism on the mounting precision can be effectively reduced; in addition, the other fulcrum of the linkage mechanism is supported on the bottom wall of the smoke collecting cavity instead of the smoke inlet plate, and the side plate on the side portion of the smoke inlet plate is connected with the second linkage support, so that the side plate is more flexible in position installation.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a linkage mechanism and a range hood. Background Art

[0002] Range hoods are electrical appliances widely used in kitchens, used to exhaust fumes generated during cooking. Range hoods all have a smoke hood assembly, which is used to open and close the air intake of the range hood. The smoke hood assembly generally includes an upper baffle, a smoke collecting plate and a smoke inlet plate. The upper baffle and the smoke collecting plate are connected by a connecting rod mechanism, and the upper baffle and the smoke inlet plate are connected by a linkage mechanism. The driving member can drive the upper baffle and the smoke collecting plate to rotate through the connecting rod mechanism, and the upper baffle can drive the smoke inlet plate to rotate through the linkage mechanism. The two fulcrums of the linkage mechanism in the prior art are mostly fixed fulcrums, which leads to high requirements on the installation position and dimensional accuracy of the linkage mechanism, resulting in greater difficulty in production and assembly. Utility Model Content

[0003] The utility model aims to provide a linkage mechanism and a range hood, which reduce the requirement of the linkage mechanism for installation accuracy and make the installation of the side plate at the side of the smoke inlet plate more flexible.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A linkage mechanism is used to connect the upper baffle plate and the smoke inlet plate. When the upper baffle plate rotates, the upper baffle plate can drive the smoke inlet plate to rotate through the linkage mechanism. The linkage mechanism includes:

[0006] A slide rail, arranged on the upper baffle;

[0007] A first linkage bracket, one end of which is slidably connected to the slide rail;

[0008] The second linkage bracket has one end hinged to the other end of the first linkage bracket and the other end hinged to the bottom wall of the smoke collecting chamber. The middle part of the second linkage bracket is connected to the side plate of the side of the smoke inlet plate.

[0009] As an optimal technical solution for the linkage mechanism, the slide rail includes a base, a first slider and a second slider, the base is arranged on the upper baffle, the first slider is slidably connected to the base, the second slider is slidably connected to the first slider, along the sliding direction of the first slider or the second slider, the length of the second slider is smaller than the length of the first slider, and one end of the first linkage bracket is connected to the second slider.

[0010] As an optimal technical solution of the linkage mechanism, the first slider is slidably nested in the inner side of the base, and the second slider is slidably nested in the inner side of the first slider. The first slider is provided with balls on both sides perpendicular to its own sliding direction, and the balls protrude from the inner and outer sides of the first slider. The part of the ball protruding from the outer side of the first slider slidably cooperates with the base, and the part of the ball protruding from the inner side of the first slider slidably cooperates with the second slider.

[0011] As a preferred technical solution of the linkage mechanism, limit baffles are provided at both ends of the base along the sliding direction of the first slider or the second slider, and the two limit baffles are used to limit the sliding of the first slider on the base.

[0012] As a preferred technical solution of the linkage mechanism, both ends of the first slider along its own sliding direction are provided with first limiting protrusions protruding toward the second slider, and both ends of the second slider along its own sliding direction are provided with second limiting protrusions protruding toward the first slider, and the two first limiting protrusions cooperate with the two second limiting protrusions one by one to limit the sliding of the second slider on the first slider.

[0013] As a preferred technical solution of the linkage mechanism, a fixing seat is provided on the bottom wall of the smoke collecting chamber, and the second linkage bracket is hinged to the fixing seat.

[0014] As an optimal technical solution for the linkage mechanism, the side panel is provided with an extension portion extending toward the second linkage bracket, the extension portion is provided with a first connecting hole, the first connecting hole is a strip hole, the second linkage bracket is provided with a second connecting hole, and a fastener connects the side panel and the second linkage bracket through the first connecting hole and the second connecting hole.

[0015] As an optimal technical solution of the linkage mechanism, the smoke inlet plate includes a smoke inlet plate main body and the side plates connected to both sides of the smoke inlet plate main body, the side plates are provided with a third connecting hole, the third connecting hole is a strip hole, the smoke inlet plate main body is provided with a fourth connecting hole, and the second fastener connects the side plate and the smoke inlet plate main body through the third connecting hole and the fourth connecting hole.

[0016] As an optimal technical solution of the linkage mechanism, the second linkage bracket includes a bracket portion a and a bracket portion b, and the bracket portion a and the bracket portion b are arranged at an obtuse angle. The end of the bracket portion a away from the bracket portion b is hinged to the first linkage bracket, and the end of the bracket portion b away from the bracket portion a is hinged to the bottom wall of the smoke collection chamber.

[0017] A range hood comprises an upper baffle, a smoke collecting plate, a smoke inlet plate, a connecting rod mechanism and a linkage mechanism as described in any of the above schemes, wherein the upper baffle and the smoke collecting plate are connected via the connecting rod mechanism, and the upper baffle and the smoke inlet plate are connected via the linkage mechanism.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a linkage mechanism, which can effectively reduce the requirement of the linkage mechanism on the installation accuracy by adopting a slide rail to replace one of the fixed fulcrums of the linkage mechanism; in addition, by supporting the other fulcrum of the linkage mechanism on the bottom wall of the smoke collecting chamber instead of on the smoke inlet plate, and connecting the side plate on the side of the smoke inlet plate with the second linkage bracket, the position installation of the side plate is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a range hood in a non-working state provided by an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the working state of the range hood provided by the embodiment of the utility model;

[0022] Figure 3 This is a partial structural schematic diagram of a range hood in a non-working state provided by an embodiment of the utility model;

[0023] Figure 4 It is a partial structural schematic diagram of the working state of the range hood provided by the embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the linkage mechanism provided by the embodiment of the utility model;

[0025] Figure 6 The structure of the slide rail in the embodiment of the present utility model is shown in FIG. Figure 1 ;

[0026] Figure 7 The structure of the slide rail in the embodiment of the present utility model is shown in FIG. Figure 2 .

[0027] In the figure:

[0028] 10. Box body; 20. Smoke hood assembly; 21. Upper baffle; 22. Smoke collecting plate; 23. Smoke inlet plate; 231. Side plate; 2311. Extension portion; 31. Slide rail; 311. Base; 3111. Limit baffle; 312. First slider; 3121. First limit protrusion; 313. Second slider; 3131. Second limit protrusion; 314. Ball bearing; 32. First linkage bracket; 33. Second linkage bracket; 331. Bracket portion a; 332. Bracket portion b; 34. Fixed seat; 35. First hinge axis; 36. Second hinge axis. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] like Figures 1 to 7 As shown, the utility model provides a range hood, comprising a housing 10, a smoke hood assembly 20, a connecting rod mechanism, a linkage mechanism and a driving member, wherein the housing 10 has a smoke collecting chamber; the smoke hood assembly 20 is arranged at the opening of the smoke collecting chamber, the smoke hood assembly 20 comprises an upper baffle 21, a smoke collecting plate 22 and a smoke inlet plate 23, the upper end of the upper baffle 21 is hinged to the upper end of the housing 10 via an upper rotating shaft, the smoke collecting plate 22 and the upper baffle 21 are connected via a connecting rod mechanism, the lower end of the smoke inlet plate 23 is hinged to the lower end of the housing 10 via a lower rotating shaft, and the smoke inlet plate 23 and the upper baffle 21 are connected via a linkage mechanism; the driving member is drivingly connected to a connecting rod in the connecting rod mechanism, the driving member can drive the upper baffle 21 and the smoke collecting plate 22 to rotate via the connecting rod mechanism, and the upper baffle 21 can drive the smoke inlet plate 23 to rotate via the linkage mechanism. The driving member can drive the smoke hood assembly 20 to switch between a closed state and an open state. Refer to Figure 1 and Figure 3 When the smoke collecting hood assembly 20 is in a closed state, the upper baffle 21, the smoke collecting plate 22 and the smoke inlet plate 23 are all in a vertical state, and the upper baffle 21 and the smoke collecting plate 22 are arranged side by side in the vertical direction, and the smoke inlet plate 23 is located on the inner side of the upper baffle 21 and the smoke collecting plate 22. Figure 2 and Figure 4When the smoke collecting hood assembly 20 is in the open state, the upper baffle 21 and the smoke collecting plate 22 rotate open around the upper rotating shaft, and the smoke inlet plate 23 rotates open around the lower rotating shaft, forming a smoke collecting area between the smoke collecting plate 22 and the smoke inlet plate 23.

[0037] The driving member and the connecting rod mechanism all adopt the existing technology and will not be described in detail here. This embodiment only introduces the linkage mechanism.

[0038] Reference Figures 3 to 5 The linkage mechanism includes a slide rail 31, a first linkage bracket 32 ​​and a second linkage bracket 33. The slide rail 31 is arranged on the upper baffle 21. One end of the first linkage bracket 32 ​​is slidably connected to the slide rail 31. The other end of the first linkage bracket 32 ​​is hinged to one end of the second linkage bracket 33 through a first hinge shaft 35. The other end of the second linkage bracket 33 is hinged to the bottom wall of the smoke collecting chamber through a second hinge shaft 36. Preferably, a fixed seat 34 is provided on the bottom wall of the smoke collecting chamber. The second linkage bracket 33 is hinged to the fixed seat 34 through a second hinge shaft 36. In addition, the middle part of the second linkage bracket 33 (the middle part here refers to any part located between the two hinged ends) is connected to the side plate 231 on the side of the smoke inlet plate 23. When the upper baffle 21 rotates around the upper rotation axis to open, the first linkage bracket 32 ​​slides downward along the slide rail 31, and at the same time the second linkage bracket 33 rotates around the first hinge axis 35 and the second hinge axis 36 in the first direction, thereby driving the smoke inlet plate 23 to rotate around the lower rotation axis to open, thereby effectively increasing the internal space of the smoke collecting chamber and enhancing the smoking effect; when the upper baffle 21 rotates around the upper rotation axis to close, the first linkage bracket 32 ​​slides upward along the slide rail 31, and at the same time the second linkage bracket 33 rotates around the first hinge axis 35 and the second hinge axis 36 in the second direction, thereby driving the smoke inlet plate 23 to rotate around the lower rotation axis to close.

[0039] By adopting a slide rail 31 to replace one of the fixed fulcrums of the linkage mechanism, the requirements for the installation accuracy of the linkage mechanism can be effectively reduced; in addition, by supporting the other fulcrum of the linkage mechanism on the bottom wall of the smoke collecting chamber instead of on the smoke inlet plate 23, and connecting the side plate 231 on the side of the smoke inlet plate 23 with the second linkage bracket 33, the position installation of the side plate 231 is more flexible.

[0040] In this embodiment, the second linkage bracket 33 includes a bracket portion a331 and a bracket portion b332, and the bracket portion a331 and the bracket portion b332 are set at an obtuse angle. The end of the bracket portion a331 away from the bracket portion b332 is hinged to the first linkage bracket 32 ​​through a first hinge shaft 35, and the end of the bracket portion b332 away from the bracket portion a331 is hinged to the fixed seat 34 through a second hinge shaft 36.

[0041] The bracket portion b332 of the second linkage bracket 33 is connected to the side plate 231 on the side of the smoke inlet plate 23. The side plate 231 is provided with an extension portion 2311 extending toward the second linkage bracket 33, and the extension portion 2311 is provided with a first connection hole. The bracket portion b332 of the second linkage bracket 33 is provided with a second connection hole, and the first fastener connects the side plate 231 and the second linkage bracket 33 through the first connection hole and the second connection hole. Preferably, the first connection hole is a strip hole, so that the installation position of the side plate 231 on the second linkage bracket 33 can be adjusted.

[0042] The smoke inlet plate 23 includes a main body of the smoke inlet plate 23 and side plates 231 connected to both sides of the main body of the smoke inlet plate 23. The side plates 231 are provided with a third connection hole, which is a strip hole. The main body of the smoke inlet plate 23 is provided with a fourth connection hole. The second fastener connects the side plates 231 and the main body of the smoke inlet plate 23 through the third connection hole and the fourth connection hole. By setting the third connection hole as a strip hole, the installation position of the side plates 231 on the main body of the smoke inlet plate 23 can be adjusted.

[0043] The position of the side plate 231 can be adjusted by adjusting the connection position between the side plate 231 and the second linkage bracket 33 and the main body of the smoke inlet plate 23 , so that the position of the side plate 231 can be installed more flexibly.

[0044] Reference Figure 6 and Figure 7 The slide rail 31 includes a base 311, a first slider 312 and a second slider 313. The base 311 is disposed on the upper baffle 21. The first slider 312 is slidably connected to the base 311. The second slider 313 is slidably connected to the first slider 312. Along the sliding direction of the first slider 312 or the second slider 313, the length of the second slider 313 is less than the length of the first slider 312. One end of the first linkage bracket 32 ​​is connected to the second slider 313. Through the above-mentioned structural setting of the slide rail 31, the sliding distance of the slide rail 31 can be extended. Preferably, the first slider 312 is slidably nested in the inner side of the base 311, and the second slider 313 is slidably nested in the inner side of the first slider 312. The first slider 312 is provided with balls 314 on both sides perpendicular to its sliding direction, and the balls 314 protrude from the inner side and outer side of the first slider 312, wherein the portion of the balls 314 protruding from the outer side of the first slider 312 is slidably matched with the base 311, and the portion of the balls 314 protruding from the inner side of the first slider 312 is slidably matched with the second slider 313. By providing the balls 314 on the first slider 312, clearance fit can be achieved between the outer side of the first slider 312 and the inner side of the base 311, and between the inner side of the first slider 312 and the outer side of the second slider 313, thereby reducing friction when the first slider 312 and the second slider 313 slide.

[0045] The base 311 is provided with limiting baffles 3111 at both ends along the sliding direction of the first slider 312 or the second slider 313, and the two limiting baffles 3111 are used to limit the sliding of the first slider 312 on the base 311. When the first slider 312 slides along the base 311, if the first slider 312 abuts against the limiting baffles 3111, the first slider 312 stops sliding to prevent the first slider 312 from detaching from the base 311. In addition, the first slider 312 is provided with first limiting protrusions 3121 protruding toward the second slider 313 at both ends along its own sliding direction, and the second slider 313 is provided with second limiting protrusions 3131 protruding toward the first slider 312 at both ends along its own sliding direction. The two first limiting protrusions 3121 and the two second limiting protrusions 3131 cooperate one by one to limit the sliding of the second slider 313 on the first slider 312. When the second slider 313 slides on the first slider 312, if the second limiting protrusion 3131 abuts against the first limiting protrusion 3121, the relative sliding of the second slider 313 and the first slider 312 stops, preventing the second slider 313 from detaching from the first slider 312. However, if the first slider 312 does not slide to the limiting baffle 3111 at this time, the second slider 313 can continue to slide along the base 311 together with the first slider 312.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A linkage mechanism, used to connect an upper baffle (21) and a smoke inlet plate (23), when the upper baffle (21) rotates, the upper baffle (21) can drive the smoke inlet plate (23) to rotate through the linkage mechanism; characterized in that: The linkage mechanism comprises: A slide rail (31) disposed on the upper baffle (21); A first linkage bracket (32), one end of which is slidably connected to the slide rail (31); A second linkage bracket (33) has one end hinged to the other end of the first linkage bracket (32), and the other end hinged to the bottom wall of the smoke collecting chamber, and a middle portion of the second linkage bracket (33) is connected to a side plate (231) on the side of the smoke inlet plate (23).

2. The linkage mechanism according to claim 1, characterized in that: The slide rail (31) comprises a base (311), a first slider (312) and a second slider (313); the base (311) is arranged on the upper baffle (21); the first slider (312) is slidably connected to the base (311); the second slider (313) is slidably connected to the first slider (312); along the sliding direction of the first slider (312) or the second slider (313), the length of the second slider (313) is smaller than the length of the first slider (312); one end of the first linkage bracket (32) is connected to the second slider (313).

3. The linkage mechanism according to claim 2, characterized in that: The first slider (312) is slidably nested in the inner side of the base (311), and the second slider (313) is slidably nested in the inner side of the first slider (312). The first slider (312) is provided with balls (314) on both sides perpendicular to its own sliding direction, and the balls (314) protrude from the inner side and outer side of the first slider (312). The part of the balls (314) protruding from the outer side of the first slider (312) is slidably matched with the base (311), and the part of the balls (314) protruding from the inner side of the first slider (312) is slidably matched with the second slider (313).

4. The linkage mechanism according to claim 2, characterized in that: Limit baffles (3111) are provided at both ends of the base (311) along the sliding direction of the first slider (312) or the second slider (313); the two limit baffles (3111) are used to limit the sliding of the first slider (312) on the base (311).

5. The linkage mechanism according to claim 2, characterized in that: Both ends of the first sliding block (312) along its own sliding direction are provided with first limiting protrusions (3121) protruding toward the second sliding block (313), and both ends of the second sliding block (313) along its own sliding direction are provided with second limiting protrusions (3131) protruding toward the first sliding block (312), and the two first limiting protrusions (3121) and the two second limiting protrusions (3131) are matched one by one to limit the sliding of the second sliding block (313) on the first sliding block (312).

6. The linkage mechanism according to claim 1, characterized in that: The bottom wall of the smoke collecting chamber is provided with a fixing seat (34), and the second linkage bracket (33) is hingedly connected to the fixing seat (34).

7. The linkage mechanism according to claim 1, characterized in that: The side plate (231) is provided with an extension portion (2311) extending toward the second linkage bracket (33); the extension portion (2311) is provided with a first connection hole, the first connection hole is a strip-shaped hole; the second linkage bracket (33) is provided with a second connection hole; a first fastener connects the side plate (231) and the second linkage bracket (33) via the first connection hole and the second connection hole.

8. The linkage mechanism according to claim 7, characterized in that: The smoke inlet plate (23) comprises a smoke inlet plate (23) main body and side plates (231) connected to both sides of the smoke inlet plate (23) main body, the side plates (231) being provided with a third connection hole, the third connection hole being a strip-shaped hole, the smoke inlet plate (23) main body being provided with a fourth connection hole, and a second fastener connecting the side plates (231) and the smoke inlet plate (23) main body via the third connection hole and the fourth connection hole.

9. The linkage mechanism according to claim 1, characterized in that: The second linkage bracket (33) comprises a bracket portion a (331) and a bracket portion b (332), wherein the bracket portion a (331) and the bracket portion b (332) are arranged at an obtuse angle, and an end of the bracket portion a (331) away from the bracket portion b (332) is hinged to the first linkage bracket (32), and an end of the bracket portion b (332) away from the bracket portion a (331) is hinged to the bottom wall of the smoke collecting chamber.

10. A range hood, characterized in that: The invention comprises an upper baffle plate (21), a smoke collecting plate (22), a smoke inlet plate (23), a connecting rod mechanism and a linkage mechanism according to any one of claims 1 to 9, wherein the upper baffle plate (21) and the smoke collecting plate (22) are connected via the connecting rod mechanism, and the upper baffle plate (21) and the smoke inlet plate (23) are connected via the linkage mechanism.

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