Flap mechanism of a range hood and range hood

Abstract

The present invention belongs to the technical field of electrical appliances, and specifically discloses a flap mechanism of an oil fume suction machine and an oil fume suction machine. The flap mechanism includes a flap assembly and a flap driving mechanism for driving the flap assembly to flip. The flap driving mechanism includes: a transmission shaft, which is located on the back of the flap assembly and extends in the left-right direction; a driving unit for driving the transmission shaft to rotate around its own axis; a transmission rod, the first end of which is fixedly connected to the transmission shaft, and the second end of which is hinged to the flap assembly. The transmission rod is located in the middle of the flap assembly in the left-right direction, and an installation hole is formed on the lower side surface of the transmission rod, and an electrical component is installed in the installation hole. The oil fume suction machine includes the above-mentioned flap mechanism. The flap mechanism and the oil fume suction machine disclosed by the present invention can reduce or eliminate the problem that the upper end of the flap assembly is not horizontal after being opened, improve the aesthetics after the flap assembly is opened, and improve the reliability of the flap assembly when it is closed.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliances, and particularly to a flap mechanism and a range hood of a range hood. Background Art

[0002] With the improvement of people's living quality, the range hood has become an essential electrical appliance in the kitchen. It is usually installed above the kitchen stove and can quickly exhaust the waste gas generated by the combustion of the gas stove and the oil fume generated during the cooking process, thereby realizing the purification of the kitchen environment and improving the comfort of people during cooking.

[0003] The existing side suction range hood is provided with a flip panel that can be flipped. When the range hood is not working, the flip panel blocks the oil fume inlet of the smoke collecting cavity to keep the panel of the range hood with a complete appearance; when the range hood is working, the flip panel is driven by the flip drive mechanism to flip upwards to a vertical state, and the oil fume inlet is exposed, so that the oil fume can enter the smoke collecting cavity through the oil fume inlet to realize waste oil filtration and oil fume extraction.

[0004] For the existing side suction range hood, an electric control box, a detection camera and a lighting lamp are usually arranged on the back side of the flip panel to take pictures or illuminate the stove when the range hood is working. However, since the detection camera or the lighting lamp is installed on the back of the flip panel and is relatively close to the flip panel, the shooting field of view or the lighting field of view is easily interfered by the flip panel, so that the detection camera cannot face downwards for detection, or the lighting lamp cannot face downwards for illumination, which affects the use effect of the detection camera or the lighting lamp and reduces the use experience of the range hood. Summary of the Invention

[0005] An object of the present invention is a flap mechanism to improve the use performance of electrical components such as a detection camera or a lighting lamp, reduce the interference of the flap assembly on the use of electrical components, and improve the use experience of the flap mechanism.

[0006] Another object of the present invention is to provide a range hood to improve the use experience of the range hood.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A flap mechanism of a range hood includes a flap assembly and a flap drive mechanism for driving the flap assembly to flip. The flap drive mechanism includes:

[0009] A transmission shaft located on the back of the flap assembly and extending in the left-right direction;

[0010] A drive unit for driving the transmission shaft to rotate around its own axis;

[0011] The transmission rod has its first end fixedly connected to the transmission shaft and its second end hinged to the flap assembly. The transmission rod is located in the middle of the flap assembly in the left - right direction. An installation hole is formed on the lower side surface of the transmission rod, and an electrical component is installed in the installation hole.

[0012] As an alternative technical solution of the flap mechanism, the electrical component is a lighting lamp or a detection sensor, and the detection head of the detection sensor is arranged downward; and / or, the electrical component is rotatably connected to the transmission rod.

[0013] As an alternative technical solution of the flap mechanism, a wire routing channel is formed on the transmission rod, the installation hole communicates with the wire routing channel, and the wire routing channel is used for threading connecting wires.

[0014] As an alternative technical solution of the flap mechanism, a fixing structure is arranged in the wire routing channel, and the fixing structure is used for fixing the electrical component.

[0015] As an alternative technical solution of the flap mechanism, the flap assembly further includes a flipping panel, and a display control device is arranged on the back surface of the flipping panel. The connecting wire of the display control device is threaded through the wire routing channel.

[0016] As an alternative technical solution of the flap mechanism, the second end of the transmission rod is located directly below the display control device, and an inlet opening is formed on the upper side of the second end of the transmission rod for the wire routing channel. The connecting wire penetrates into the wire routing channel from the inlet opening.

[0017] As an alternative technical solution of the flap mechanism, the flap assembly further includes a mounting plate connected to the back surface of the flipping panel. The mounting plate protrudes outward in a direction away from the flipping panel to form a mounting box portion, and the display control device is installed in the mounting box portion. A wire passing opening for the connecting wire to pass through is formed on the lower side wall of the mounting box portion.

[0018] As an alternative technical solution of the flap mechanism, the upper surface of the second end of the transmission rod has an upward - opening arc surface, and the inlet opening is formed at the concave portion of the arc surface.

[0019] As an alternative technical solution of the flap mechanism, the transmission rod includes a rod main body portion that extends obliquely downward from back to front, and a fixing sleeve portion extends obliquely backward and downward at the rear end of the rod main body portion. The fixing sleeve portion is sleeved on the transmission shaft, and the wire routing channel is formed on the rod main body portion and penetrates through the rear end face of the rod main body portion.

[0020] As an alternative technical solution of the flap mechanism, the transmission rod includes a main rod body, both ends of the main rod body are respectively connected to the transmission shaft and the flap assembly, a wire groove penetrating at least one end is formed in the main rod body, and the mounting hole communicates with the wire groove.

[0021] As an alternative technical solution of the flap mechanism, the wire groove is formed in the upper side surface of the main rod body;

[0022] And / or, the transmission rod further includes a cover plate, the cover plate is detachably connected to the main rod body to block the side slot opening of the wire groove, and the cover plate and the groove wall of the wire groove enclose a wire channel.

[0023] As an alternative technical solution of the flap mechanism, the outer surface of the cover plate is flush with the outer side surface of the main rod body where the side slot opening is located;

[0024] And / or, the cover plate includes a sealing plate portion, several connecting plate portions extend outward from at least one side in the width direction of the sealing plate portion, mounting grooves are formed in the main rod body, the mounting grooves are arranged in one-to-one correspondence with the connecting plate portions, the sealing plate portion is inserted into the side slot opening, and the connecting plate portions extend into the mounting grooves and are connected to the bottom of the mounting grooves.

[0025] As an alternative technical solution of the flap mechanism, the cross section of the connecting wire is rectangular, and the cross section of the wire channel is a rectangular surface adapted to the connecting wire.

[0026] As an alternative technical solution of the flap mechanism, the driving end of the driving unit can stretch in a direction towards or away from the flap assembly, the flap driving mechanism further includes a driving rod, both ends of the driving rod are respectively connected to the driving end and the transmission shaft, and the driving unit drives the transmission shaft to rotate through the driving rod.

[0027] As an alternative technical solution of the flap mechanism, the transmission shaft has a first shaft section, a cutting plane is formed on the outer wall of the first shaft section, D-shaped holes are formed at the first ends of the transmission rod and the driving rod, the cross-sectional shape of the D-shaped hole is adapted to that of the first shaft section, and the first shaft section is inserted into the two D-shaped holes.

[0028] As an alternative technical solution of the flap mechanism, the transmission shaft includes a second shaft section coaxially connected to the first shaft section, and the outer diameter of the second shaft section is greater than that of the first shaft section;

[0029] And / or, the cutting plane extends to both ends of the transmission shaft, and the cutting plane is arranged downward.

[0030] As an alternative technical solution of the flap mechanism, the drive rod is located on the left or right side of the flap assembly;

[0031] And / or, the drive rod is a solid rod.

[0032] As an alternative technical solution of the flap mechanism, the first end of the drive rod has a connecting sleeve portion, and the connecting sleeve portion is fixedly sleeved on the transmission shaft;

[0033] And / or, a U-shaped groove is formed at the second end of the drive rod, and the drive end is inserted into the U-shaped groove and rotatably connected to the opposite two side walls of the U-shaped groove.

[0034] An oil fume extractor includes the flap mechanism as described above.

[0035] The beneficial effects of the present invention are as follows:

[0036] The flap mechanism provided by the present invention drives the transmission shaft to rotate through the drive unit, and drives the flap assembly to flip by driving the transmission rod to rotate through the transmission shaft. Since the transmission rod is arranged in the middle of the flap assembly in the left-right direction, two transmission connecting rods arranged on the left and right sides of the flap assembly in the traditional oil fume extractor are omitted, eliminating the problem of height difference between the left and right sides at the upper end of the flap assembly caused by inconsistent deformation of the two transmission connecting rods on both sides, improving the aesthetic appearance of the flap mechanism, and effectively ensuring that the flap assembly can return from the open state to the closed state, improving the use reliability of the flap mechanism; at the same time, since electrical components are installed on the transmission rod, the distance between the electrical components and the flap assembly can be increased, and after the flap assembly is opened, the electrical components can face downward directly towards the cooking range, improving the use efficiency of the electrical components and the use experience of the flap mechanism.

[0037] The oil fume extractor provided by the present invention can reduce or eliminate the problem of inconsistent heights on the left and right sides at the upper end after the flap assembly is opened by adopting the above flap mechanism, improving the aesthetic appearance of the oil fume extractor and the use reliability of the oil fume extractor; at the same time, the use experience of the oil fume extractor can be improved. Description of the Drawings

[0038] Figure 1 is a schematic structural diagram of the oil fume extractor provided in the first embodiment of the present invention from one perspective;

[0039] Figure 2 is a schematic structural diagram of the oil fume extractor provided in the first embodiment of the present invention from another perspective;

[0040] Figure 3 is a schematic structural diagram of the flap mechanism provided in the first embodiment of the present invention;

[0041] Figure 4 is a schematic structural diagram of the transmission shaft provided in the first embodiment of the present invention;

[0042] Figure 5 It is a schematic structural view of the driving rod provided in the first embodiment of the present invention;

[0043] Figure 6 It is a schematic structural view of the transmission rod provided in the first embodiment of the present invention;

[0044] Figure 7 It is a schematic exploded structural view of the transmission rod provided in the first embodiment of the present invention;

[0045] Figure 8 It is a schematic exploded structural view of the flap assembly provided in the first embodiment of the present invention.

[0046] The markings in the figure are as follows:

[0047] 100, flap mechanism; 200, smoke collecting hood; 201, hood side plate; 202, hood top plate; 203, hood bottom plate; 204, smoke baffle; 2041, groove; 205, smoke separating plate; 300, air box; 400, exhaust assembly; 500, oil cup; 600, display control device;

[0048] 1, flap assembly; 11, flipping panel; 12, hinge seat; 121, fixing plate part; 122, ear plate part; 13, mounting plate; 131, convex part; 132, mounting box part; 1321, wire passing port; 1322, mounting port; 14, cover;

[0049] 2, driving unit;

[0050] 3, transmission rod; 31, main rod body; 311, rod main body part; 3111, wire routing groove; 3112, inlet port; 3113, outlet port; 3114, mounting hole; 3115, mounting groove; 312, fixing sleeve part; 3121, shaft hole; 3122, mounting plane; 3123, fastening through hole; 313, hinge part; 314, rotating shaft part; 315, mounting structure; 32, cover plate; 321, sealing plate part; 322, connecting plate part;

[0051] 4, transmission shaft; 41, first shaft section; 411, cutting plane; 412, fastening threaded hole; 413, locking threaded hole; 42, second shaft section;

[0052] 5, auxiliary connecting rod; 511, first rod section; 512, second rod section; 513, third rod section;

[0053] 6, support frame; 61, mounting frame body; 62, rotating seat;

[0054] 7, driving rod; 71, U-shaped groove; 72, connecting sleeve part; 721, shaft connection hole; 722, locking plane; 723, fixing through hole;

[0055] 8. Display control device. Specific embodiments

[0056] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0057] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0059] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0060] Embodiment 1

[0061] This embodiment provides a range hood, which can solve the problem that the left and right heights at the upper end are different after the flip panel of the existing range hood is opened, improve the aesthetic appearance of the range hood in the use state, and ensure that the flip panel 11 of the range hood can smoothly return from the open state to the closed state, thereby improving the use reliability of the range hood.

[0062] As Figure 1 andFigure 2 As shown in Figure 2 , the range hood includes a smoke collecting hood 200, an exhaust assembly 400 and a flap mechanism 100. The smoke collecting hood 200 has a smoke collecting cavity with a front side notch, and the front side notch of the smoke collecting cavity forms a smoke inlet. The flap mechanism 100 is arranged on the front side of the smoke collecting hood 200 and can open or close the smoke inlet; the exhaust assembly 400 is arranged in the smoke collecting hood 200 to exhaust the smoke entering the smoke collecting hood 200; an oil cup 500 is arranged at the lower end of the smoke collecting hood 200 and has an oil collecting groove with an upper opening. The cooled liquid waste oil flows downward along the surface of the smoke collecting hood 200 under the action of gravity into the oil collecting groove to achieve waste oil collection.

[0063] The flap mechanism 100 includes a flap assembly 1 and a flap driving mechanism. The flap driving mechanism can drive the flap assembly 1 to switch between an open state and a closed state. When the flap assembly 1 is in the closed state, the flap assembly 1 closes the smoke inlet and fits with the smoke collecting hood 200 to form a complete outer surface. When the flap assembly 1 is in the open state, the flap assembly 1 flips upward to a vertical or nearly vertical state to expose the smoke inlet.

[0064] The smoke collecting hood 200 includes a hood top plate 202 and a hood bottom plate 203 that are horizontally arranged and spaced up and down, and also includes a rear hood plate and two hood side plates 201 connected between the hood top plate 202 and the hood bottom plate 203. The two hood side plates 201 are opposite and spaced in the left - right direction. The hood top plate 202, the hood bottom plate 203, the rear hood plate and the two hood side plates 201 enclose the above - mentioned smoke collecting cavity. Among them, the hood side plate 201 is a right - angled trapezoidal structure, and its front side edge is inclined backward from top to bottom.

[0065] The smoke collecting hood 200 further includes a smoke baffle 204 connected between the hood top plate 202, the hood bottom plate 203 and the two hood side plates 201. The smoke baffle 204 is inclined backward from top to bottom, and the above - mentioned smoke inlet is opened on the smoke baffle 204. By setting the smoke baffle 204 and opening the smoke inlet on the smoke baffle 204, the opening position and size of the smoke inlet can be controlled. A filter screen is preferably arranged at the smoke inlet to cool and filter the high - temperature smoke, which is beneficial to waste oil collection.

[0066] Preferably, the smoke baffle 204 is recessed inward to form a groove 2041, and the smoke inlet is opened at the bottom of the groove 2041. When the flap assembly 1 is in the closed state, the four - perimeter of the back surface of the flap assembly 1 fits with the front surface of the smoke baffle 204. The setting of the groove 2041 can provide clearance for the electrical components and the structures protruding backward on the back surface of the flap assembly 1, and also provide clearance for the flap assembly 1 and the flap driving mechanism.

[0067] The flap driving mechanism includes a driving unit 2 and a transmission component. The driving unit 2 is installed on the back surface of the smoke baffle 204. The transmission component is connected between the back surface of the flap assembly 1 and the driving unit 2, and the transmission component passes through the smoke baffle 204. To reduce the pollution of the driving unit 2 by the oil fume in the smoke collecting hood 200, a smoke separation plate 205 is provided inside the smoke collecting hood 200. The two smoke separation plates 205 are opposite and spaced apart in the left-right direction, and multiple side edges of the smoke separation plate 205 are respectively connected to the hood top plate 202 and the rear hood plate, so that a smoke separation cavity is formed between the smoke separation plate 205 and the corresponding side hood side plate 201. The driving unit 2 is installed in the smoke separation cavity. A smoke gathering cavity is formed between the two smoke separation plates 205, and the oil fume inlet is directly communicated with the smoke gathering cavity.

[0068] The range hood further includes an air box 300 provided above the hood top plate 202. The left and right side walls of the air box 300 are respectively connected to the upper ends of the two smoke separation plates 205. The lower ends of the front and rear side walls of the air box 300 are connected to the hood top plate 202. The air inlet of the air box 300 is communicated with the smoke gathering cavity, and an exhaust component 400 is provided at the air box 300. The oil fume entering from the oil fume inlet enters the smoke gathering cavity and is directly sucked upward and discharged by the exhaust component 400, so that the oil fume escaping into the smoke separation cavity can be effectively reduced, and the protection of the driving unit 2 is enhanced.

[0069] As Figure 3 shown, the transmission component includes a transmission shaft 4 and a transmission rod 3. The transmission shaft 4 is located on the back surface of the flap assembly 1 and extends in the left-right direction. The two ends of the transmission shaft 4 are respectively rotatably connected to the smoke collecting hood 200. The driving unit 2 drives the transmission shaft 4 to rotate around its own axis. The first end of the transmission rod 3 is fixedly connected to the transmission shaft 4, and the second end is hinged to the back surface of the flap assembly 1. The transmission rod 3 is located in the middle of the flap assembly 1 in the left-right direction, and a wire routing channel is provided on the transmission rod 3.

[0070] In the flap mechanism 100 provided in this embodiment, the driving unit 2 drives the transmission shaft 4 to rotate, and the transmission shaft 4 drives the transmission rod 3 to rotate to drive the flap assembly 1 to flip. Since the transmission rod 3 is arranged in the middle of the flap assembly 1 in the left-right direction, the two transmission connecting rods provided on the left and right sides of the flap assembly 1 in the traditional range hood are omitted, and the problem that there is a height difference between the left and right sides at the upper end of the flap assembly 1 caused by inconsistent deformation of the two side transmission connecting rods is eliminated, improving the appearance beauty of the flap mechanism 100 and the range hood, and effectively ensuring that the flap assembly 1 can return from the open state to the closed state, improving the use reliability of the flap mechanism 100 and the range hood.

[0071] As Figure 2 and Figure 3As shown in the figure, to enhance the support performance of the flap assembly 1, the flap mechanism 100 further includes auxiliary linkages 5. One auxiliary linkage 5 is provided on each of the left and right sides of the flap assembly 1. The first end of each auxiliary linkage 5 is hinged to the smoke collecting hood 200, and the second end of the auxiliary linkage 5 is hinged to the back surface of the flap assembly 1. That is, the flap assembly 1 is supported by the transmission rod 3 in the middle and the two auxiliary linkages 5 on both sides, which can better ensure the stability and reliability of the flap assembly 1 during flipping.

[0072] Furthermore, the flap assembly 1 has a central plane passing through the midpoint in the left-right direction and perpendicular to the left-right direction. The two auxiliary linkages 5 are symmetrically arranged with respect to the central plane, and the central plane passes through the transmission rod 3 to better improve the force balance on both sides of the flap assembly 1.

[0073] The auxiliary linkage 5 is preferably in a U-shaped structure with an upward opening, and the U-shaped structure is a flared U-shaped structure. The two ends of the U-shaped structure are respectively hinged to the smoke collecting hood 200 and the back surface of the flap assembly 1. This kind of structure setting is beneficial to increasing the structural strength and rigidity of the auxiliary linkage 5, improving the support performance of the auxiliary linkage 5, and at the same time, it can also reduce the space required for the auxiliary linkage 5 to rotate when the flap assembly 1 rotates from the closed state to the open state, thereby reducing the probability of interference or collision between the auxiliary linkage 5 and other structures during rotation.

[0074] Furthermore, the auxiliary linkage 5 includes a main rod portion and the above-mentioned auxiliary rotating shaft portion protruding from the main rod portion. The main rod portion includes a first rod segment 511, a second rod segment 512, and a third rod segment 513 that are sequentially connected at an angle. One end of the first rod segment 511 away from the second rod segment 512 is hinged to the smoke collecting hood 200, one end of the third rod segment 513 away from the second rod segment 512 is hinged to the back surface of the flipping panel 1, and the second rod segment 512 passes through the smoke baffle 204. The first angle between the first rod segment 511 and the second rod segment 512 is smaller than the second angle between the second rod segment 512 and the third rod segment 513.

[0075] To improve the convenience of rotating and installing the transmission shaft 4 and the auxiliary linkage 5 on the back surface of the smoke baffle 204, support frames 6 are provided on both the left and right sides of the smoke baffle 204. The two support frames 6 are respectively installed in two smoke separation cavities. The two ends of the transmission shaft 4 are respectively rotatably installed on the two support frames 6, the first end of the auxiliary linkage 5 is rotatably installed on the corresponding support frame 6, and the driving unit 2 is installed on the corresponding support frame 6. Thus, the flap driving mechanism is installed on the support frame 6 and is not directly connected to the smoke baffle 204, and only the support frame 6 is connected to the smoke baffle 204. This can effectively simplify the processing of the smoke baffle 204 and improve the disassembly and assembly convenience of the flap driving mechanism.

[0076] The support frame 6 preferably includes a mounting frame body 61 and a rotating seat 62. The mounting frame body 61 is detachably connected to the smoke baffle 204, and the mounting frame body 61 has a mounting space with an opening facing away from the smoke baffle 204. The driving unit 2 is installed in the mounting space, and the rotating seat 62 is detachably arranged in the mounting space. Both ends of the connecting rod and the transmission shaft 4 are rotatably mounted on the rotating seat 62. This setting is beneficial to simplifying the structure of the support frame 6, so that on the basis of the unchanged structure of the mounting frame body 61, the structure of the rotating seat 62 can be adaptively set according to the specific structure of the flap driving mechanism, improving the versatility of the mounting frame body 61 and the convenience of structure adjustment.

[0077] The specific structure of the support frame 6 can refer to the structure in existing range hoods, and the present invention does not limit this.

[0078] As Figures 3 - 5 shown, preferably, the driving end of the driving unit 2 can extend in a direction towards or away from the flap assembly 1. The driving unit 2 is connected to the transmission shaft 4 through a driving rod 7. The second end of the driving rod 7 is hinged to the driving end of the driving unit 2, and the first end of the driving rod 7 is fixedly connected to the transmission shaft 4. When the driving end of the driving unit 2 extends and retracts, it can drive the second end of the driving rod 7 to flip, thereby driving the first end of the driving rod 7 to rotate, that is, driving the transmission shaft 4 to rotate. This setting can simplify the structure of the driving unit 2, so that the driving unit 2 can adopt existing linear driving structures such as push rod motors, with a simple driving method and high driving reliability. Preferably, the driving unit 2 is an electric push rod.

[0079] To improve the connection convenience between the driving rod 7 and the driving unit 2, a U-shaped groove 71 is opened at the second end of the driving rod 7. The notch of the U-shaped groove 71 faces the driving end of the driving unit 2, and through first hinge holes are opened in opposite side walls of the U-shaped groove 71, and the two first hinge holes are directly opposite and communicated. The driving end of the driving unit 2 extends into the U-shaped groove 71, and a second hinge hole is opened on the driving end. The first hinge hole and the second hinge hole are directly opposite and communicated, and the driving end and the driving connecting rod part are hinged through a hinge shaft passing through the second hinge hole and the two first hinge holes. The hinge shaft is parallel to and spaced from the transmission shaft 4.

[0080] The first end of the driving rod 7 has a connecting sleeve part 72. An axial connection hole 721 is opened through the connecting sleeve part 72 along the axis direction of the transmission shaft 4. The axial connection hole 721 is preferably a D-shaped hole. The cross-section of the shaft section of the transmission shaft 4 connected to the driving rod 7 is a D-shaped section adapted to the D-shaped hole. The transmission shaft 4 is inserted into the axial connection hole 721 to improve the connection reliability between the transmission shaft 4 and the driving rod 7 while preventing the transmission shaft 4 from rotating relative to the driving rod 7, ensuring the connection reliability and rotation synchronism of the two.

[0081] Further, the drive shaft 4 includes a first shaft section 41. A tangent plane 411 is cut on the outer wall of the first shaft section 41. A D-shaped hole is also formed at the first end of the transmission rod 3. The first shaft section 41 passes through the D-shaped hole of the transmission rod 3 and the shaft connection hole 721. This enables the transmission rod 3 and the drive rod 7 to share a tangent plane 411, simplifying the machining of the drive shaft 4. In other embodiments, tangent planes 411 can also be provided corresponding to the drive rod 7 and the transmission rod 3 respectively.

[0082] The drive shaft 4 has locking threaded holes 413 that penetrate the tangent plane 411 vertically. At least two locking threaded holes 413 are arranged at intervals along the axial direction of the drive shaft 4. The outer side surface of the connecting sleeve portion 72 has a locking plane 722. The locking plane 722 is disposed opposite to the vertical side of the D-shaped hole. A fixing through hole 723 is formed through the locking plane 722. The fixing through holes 723 are arranged in one-to-one correspondence with the locking threaded holes 413. The connecting sleeve portion 72 and the second shaft section are connected by threaded fasteners passing through the fixing through holes 723 and the locking threaded holes 413.

[0083] The structure of the drive rod 7 between the connecting sleeve portion 72 and the U-shaped groove 71 is a solid structure to ensure the overall structural strength and stiffness of the drive rod 7. The drive rod 7 is preferably made of a metal material with good structural strength and stiffness.

[0084] As Figures 3 - 7 shown, the transmission rod 3 preferably has a rod main body portion 311. The rod main body portion 311 extends obliquely downward from back to front, and a fixing sleeve portion 312 extends obliquely backward and downward at the rear end. That is, a downward-facing lower included angle is formed between the fixing sleeve portion 312 and the rod main body portion 311, which is beneficial to reducing the torque applied by the drive shaft 4 to the transmission rod 3 when the drive shaft 4 drives the transmission rod 3 to rotate, and improving the service life of the transmission rod 3.

[0085] Preferably, the front end of the rod main body portion 311 extends obliquely forward and upward to form a hinged portion 313. The hinged portion 313 is hinged to the flap assembly 1. That is, an upward-facing upper included angle is formed between the rod main body portion 311 and the hinged portion 313, which can avoid interference between the flipping assembly and the transmission rod 3 during the flipping process and improve the rotation smoothness of the flap assembly 1.

[0086] In this embodiment, a wire routing channel is provided on the rod main body portion 311, and the extending direction of the wire routing channel is the same as the extending direction of the rod main body portion 311. An inlet 3112 of the wire routing channel is formed on the upper surface of the front end of the rod main body portion 311, and an outlet 3113 of the wire routing channel is formed at the rear end of the rod main body portion 311. The outlet 3113 is located above the fixing sleeve portion 312. That is, the above arrangement is also beneficial to the opening of the wire routing channel and can effectively reduce the interference between the connecting wire and the drive shaft 4, reducing the probability of the connecting wire winding around the drive shaft 4.

[0087] Preferably, both the upper included angle and the lower included angle are greater than 60° and less than or equal to 120° to improve the structural strength and force balance of the transmission rod 3. The two ends of the rod main body 311 are smoothly and transitionally connected to the hinge part 313 and the fixed sleeve part 312 respectively to reduce the sharp corners, improve the aesthetic appearance of the transmission rod 3, and reduce the probability of local stress concentration.

[0088] To facilitate the connection between the transmission shaft 4 and the transmission rod 3, the fixed sleeve part 312 is axially provided with a shaft hole 3121 along the transmission shaft 4. The shaft hole 3121 is a D-shaped hole, and the cross-sectional area of the D-shaped hole is adapted to that of the first shaft section 41, so as to prevent the transmission shaft 4 from rotating relative to the transmission rod 3.

[0089] Furthermore, the fixed sleeve part 312 and the transmission shaft 4 are locked by screws to improve the connection stability. Specifically, the surface of the fixed sleeve part 312 is preferably provided with an installation plane 3122. The installation plane 3122 is parallel and spaced from the tangent plane 411. A fastening through hole 3123 is provided on the installation plane 3122, and a fastening threaded hole 412 is provided on the tangent plane 411. The fastening threaded holes 412 and the fastening through holes 3123 are arranged in one-to-one correspondence. The fixed sleeve part 312 and the transmission shaft 4 are locked by fastening screws passing through the fastening through holes 3123 and the fastening threaded holes 412. The fastening through holes 3123 are preferably spaced at least two along the axial direction of the transmission shaft 4.

[0090] To improve the connection convenience between the hinge part 313 and the flap assembly 1, a rotating shaft part 314 protrudes from one side surface of the hinge part 313, and an ear plate part 122 protrudes from the back surface of the flap assembly 1. A hinge shaft hole is provided on the ear plate part 122, and the rotating shaft part 314 passes through the hinge shaft hole.

[0091] In this embodiment, the transmission shaft 4 further includes a second shaft section 42 coaxially connected to the first shaft section 41. The tangent plane 411 extends to the end of the first shaft section 41 away from the second shaft section 42. The outer diameter of the second shaft section 42 is greater than that of the first shaft section 41, which is beneficial to facilitating the installation of the transmission shaft 4 with the drive rod 7 and the transmission rod 3 while increasing the structural strength and stiffness of the transmission shaft 4 and reducing the probability of the transmission shaft 4 twisting.

[0092] Furthermore, the transmission shaft 4 further includes two first shaft sections 43. The third shaft sections 43 are respectively coaxially connected to the ends of the first shaft section 41 and the second shaft section 42. The outer diameter of the third shaft section 43 is smaller than that of the first shaft section 41, and the third shaft section 43 is rotatably connected to the rotating seat 62.

[0093] The transmission rod 3 has a wiring channel, and the connecting wires drawn from the display control device 8 are inserted into the wiring channel to realize hidden wiring. The wiring channel preferably extends along the length direction of the rod body 311, and an inlet 3112 and an outlet 3113 are formed at both ends. By setting the wiring channel in the transmission rod 3, the regularity of the wiring of the connecting wires can be improved, the entanglement of the connecting wires with the transmission shaft 4 and / or the transmission rod 3 can be avoided, and the safety of the use of the connecting wires can be improved; at the same time, by setting the wiring channel, the exposure of the connecting wires can be reduced, the damage of the connecting wires to the oil smoke can be reduced, the appearance of the range hood can be improved, and the convenience of cleaning the connecting wires can be improved.

[0094] The transmission rod 3 includes a main rod body 31 and a cover plate 32. The main rod body 31 includes the above-mentioned rod body part 311, a fixing sleeve part 312 and a hinge part 313. A wiring groove 3111 is provided on one side wall of the rod body part 311. The cover plate 32 is detachably connected to the main rod body 31 to block or open the side notch of the wiring groove 3111. The cover plate 32 and the groove bottom of the wiring groove 3111 are combined to form the above-mentioned wiring channel. By setting the cover plate 32, the connecting wires in the wiring groove 3111 can be completely exposed by removing the cover plate 32, so as to facilitate the installation and removal of the connecting wires in the wiring channel; and the setting of the cover plate 32 can also prevent the connecting wires from being separated from the wiring channel when in use, thereby ensuring the wiring reliability.

[0095] Preferably, the cross section of the rod body 311 is rectangular, and the wiring groove 3111 is opened at one side of the rod body 311 to facilitate the opening of the wiring groove 3111 and improve the structural strength and rigidity of the transmission rod 3. In other embodiments, the rod body 311 can also be a cylindrical rod.

[0096] The outer surface of the cover plate 32 is flush with the outer side surface of the main rod body 31 where the side notch is located, so as to improve the appearance of the transmission rod 3 and reduce the edges of the transmission rod 3.

[0097] In this embodiment, the cover plate 32 preferably includes a sealing plate portion 321 and a connecting plate portion 322. The width of the sealing plate portion 321 is the same as the width of the side notch of the wiring groove 3111, and the sealing plate portion 321 is inserted into the side notch. The sealing plate portion 321 has a plurality of connecting plate portions 322 extending outward from at least one side along the width direction. A mounting groove 3115 is recessed on one side of the rod body portion 311 provided with the wiring groove 3111. The connecting plate portion 322 is inserted into the mounting groove 3115 and connected to the bottom of the mounting groove 3115. In other embodiments, the cover plate 32 can also be directly covered on one side of the rod body portion 311 provided with the wiring groove 3111 and connected to the side surface.

[0098] Preferably, two connecting plate portions 322 are provided on both sides of the sealing plate portion 321 in the width direction, and the two connecting plate portions 322 on the same side are respectively located at both ends of the extending direction of the sealing plate portion 321 to improve the connection reliability between the cover plate 32 and the rod main body portion 311. In other embodiments, the number and arrangement positions of the connecting plate portions 322 can be adaptively set according to requirements, and the present embodiment does not limit this.

[0099] In this embodiment, the wire groove 3111 is formed on the upper side surface of the rod main body portion 311, and an installation hole 3114 is formed through the bottom of the wire groove 3111, and an electrical component is installed in the installation hole 3114. In this embodiment, the electrical component is a lighting lamp. By arranging the lighting lamp on the lower side surface of the transmission rod 3, when the flap assembly 1 is in the open state, the light of the lighting lamp is downward, directly facing the cooking range, improving the convenience of using the range hood. At the same time, compared with the conventional range hood that arranges the lighting lamp on the back of the flap assembly 1, it can avoid the flap assembly 1 blocking the light of the lighting lamp, increase the lighting area, and enhance the lighting effect; moreover, the installation hole 3114 of the lighting lamp is communicated with the wire channel, which is also convenient for the wiring of the lighting lamp.

[0100] In another embodiment, the electrical component can also be a detection sensor, and the detection head of the detection sensor is downward to detect the cooking range. The detection sensor can be, but is not limited to, a camera.

[0101] Preferably, installation structures are protruded on opposite sides of the installation hole 3114 at the bottom of the wire groove 3111, and the installation structures are used for installing and fixing the lighting lamp. It can be understood that the installation structures can be, but are not limited to, installation bosses, buckles or other structures, and the installation structures can be specifically set according to the type and structural form of the electrical component.

[0102] Furthermore, the electrical component is rotatably connected to the transmission rod 3 to adjust the lower end orientation of the electrical component, thereby adjusting the use angle of the electrical component, adjusting the detection field of view or the lighting field of view of the electrical component, and further improving the use flexibility and use effect of the electrical component.

[0103] As Figure 3 and Figure 8 shown, for facilitating the installation of the auxiliary connecting rod 5 and the transmission rod 3, the flap assembly 1 includes a flipping panel 11 and a hinge seat 12. The hinge seats 12 are arranged in one-to-one correspondence with the auxiliary connecting rod 5 and the transmission rod 3. Each hinge seat 12 includes a fixing plate portion 121 and an ear plate portion 122 vertically protruding from the fixing plate portion 121. A shaft through hole is formed in the ear plate portion 122. The second end of the auxiliary connecting rod 5 has a secondary rotating shaft portion, and the secondary rotating shaft portion and the rotating shaft portion 314 are respectively inserted through the corresponding shaft through holes.

[0104] Preferably, the flap assembly 1 further includes a mounting plate 13 connected to the back surface of the flipping panel 11. Preferably, the flipping panel 11 is bonded to the mounting plate 13 to avoid opening holes in the flipping panel 11 and ensure the integrity of the outer shape of the flipping panel 11. The fixed plate portion 121 is clamped between the mounting plate 13 and the flipping panel 11, and the ear plate portion 122 vertically penetrates through the mounting plate 13. This setting can avoid opening holes and slots in the flipping panel 11 and prevent the problem that the connection force between the hinge seat 12 and the flipping panel 11 is small and prone to falling off under force when only bonded. It ensures that the acting forces exerted by the connecting rods (auxiliary connecting rod 5 and transmission rod 3) on the fixed plate portion 121 can be dispersed to various places through the mounting plate 13, improving the setting stability of the hinge seat 12.

[0105] Further, the mounting plate 13 protrudes outward from the direction away from the flipping panel 11 to form a convex portion 131. The convex portions 131 and the hinge seats 12 are arranged in one-to-one correspondence. The convex portion 131 and the back surface of the flipping panel 11 enclose a cavity. The fixed plate portion 121 is clamped between the convex portion 131 and the back surface of the flipping panel 11, and the fixed plate portion 121 is bonded to the convex portion 131 and / or the back surface of the flipping panel 11. The ear plate portion vertically penetrates through the convex portion 131. This setting can reduce the thickness requirement for the mounting plate 13 and improve the processing convenience of the mounting plate 13. The mounting plate 13 is preferably made of a metal material, and the metal material can be but is not limited to aluminum alloy, etc.

[0106] Preferably, the mounting plate 13 protrudes from the direction away from the flipping panel 11 to form a mounting box portion 132. The mounting box portion 132 has a mounting cavity with an opening facing the flipping panel 11. A display control device 8 is installed in the mounting cavity. The display control device 8 is used to display and control the operation of the range hood. By forming the mounting box portion 132 by protruding the mounting plate 13, the installation convenience of the display control device 8 can be improved, avoiding separately setting a box structure for installing the display control device 8, simplifying the structure and reducing costs.

[0107] Preferably, a mounting opening 1322 is formed at the bottom of the mounting cavity. The display control device 8 can enter or exit the mounting cavity through the mounting opening 1322. The flap assembly 1 further includes a cover 14. The cover 14 is detachably connected to the mounting box portion 132 and can block the mounting opening 1322. By providing the mounting opening 1322 and the mounting box portion 132, when disassembling and assembling the display control device 8, by removing the cover 14 from the mounting plate 13, the display control device 8 can be installed into the mounting cavity or the display control device 8 in the mounting cavity can be taken out for maintenance and replacement without removing the mounting plate 13 from the flipping panel 11.

[0108] The included angle between the cavity wall and the cavity bottom of the installation cavity is preferably an obtuse angle, so that the installation cavity has a flared structure from the cavity bottom to the opening, further improving the installation convenience of the display control device 8 in the installation cavity and facilitating the processing and forming of the installation box part 132. A wire passing opening 1321 is provided on one side wall of the installation cavity, and the connecting wire of the display control device 8 passes through the wire passing opening 1321 and exits the installation box part 132.

[0109] The second end of the transmission rod 3 is located below the installation box part 132, and a wire passing opening 1321 is formed on the lower side wall of the installation box part 132, which can effectively improve the routing convenience of the connecting wire. Further, a wire inlet 3112 is formed on the upper side of the second end of the transmission rod 3 in the wire routing channel to improve the smoothness of the connecting wire entering the wire inlet 3112 from the wire passing opening 1321.

[0110] A detection opening is formed on the lower side wall of the installation cavity, and a detection camera is installed at the detection opening. At least part of the detection camera is located in the installation cavity, and the detection head of the detection camera faces downward towards the detection opening. The detection camera is used to take pictures of the pattern of the cooking range downward to detect the state of the cooking range, so as to better and more intelligently control the operation of the range hood. Preferably, two detection cameras are arranged at intervals in the left-right direction.

[0111] Embodiment 2

[0112] This embodiment provides a flap mechanism of a range hood and a range hood. The basic structure of the range hood provided in this embodiment is the same as that in Embodiment 1, and only the settings of the connecting wire and the wire routing channel are different. The same structures as those in Embodiment 1 will not be described in detail in this embodiment.

[0113] The cross-section of the connecting wire is preferably rectangular, and the cross-section of the wire routing channel preferably has a rectangular structure adapted to the connecting wire. By setting the rectangular connecting wire, when the cross-sectional area of the connecting wire remains unchanged, compared with the circular connecting wire, the thickness of the rectangular cross-section connecting wire is thinner, so that a wire routing channel with a smaller depth can be adopted, that is, while ensuring effective wire threading, the side wall thickness of the driven connecting rod is increased, that is, the structural strength and stiffness of the driven connecting rod are increased, and further the supporting performance of the driven connecting rod is improved, and the deformation amount of the driven connecting rod after being stressed is reduced.

[0114] The cross-section of the main body structure of the main rod body 31 is rectangular. Thus, on the basis of the same cross-sectional size of the main rod body 31, setting the wire groove 3111 with a rectangular cross-section compared with setting the wire groove 3111 with a circular cross-section, the groove depth of the wire groove 3111 is smaller. Therefore, after the wire groove 3111 is opened on the main rod body 31, the wall thickness of the remaining side wall will be larger, that is, the structural strength of the main rod body 31 is better, that is, the structural strength of the driven connecting rod is better.

[0115] Preferably, the connecting wire has adjacent first and second side surfaces. The first side surface is perpendicular to the left - right direction, and the width of the first side surface is greater than that of the second side surface. The first side surface abuts against the bottom of the wire groove 3111, and the second side surface abuts against the two opposite side walls of the wire groove 3111. Thus, the depth of the wire groove 3111 is less than its width, which is beneficial to increasing the effective width of the driven link in the left - right direction, that is, enhancing the structural strength and stiffness of the driven link.

[0116] Embodiment Three

[0117] This embodiment provides a flap mechanism of a range hood and a range hood. The basic structure of the range hood provided in this embodiment is the same as that in Embodiment One, except for the setting of the transmission shaft. The same structures as those in Embodiment One will not be described in detail in this embodiment.

[0118] When the flip - up panel 11 is in the open state, if the transmission shaft 4 twists due to large force, it will also cause the driven link to twist, that is, the support point of the driven link for the flip - up panel 11 moves downward, and then a height difference appears on the left and right sides at the upper end of the flip - up panel 11.

[0119] The transmission shaft 4 provided in this embodiment includes a first shaft section. The outer peripheral surface of the first shaft section includes a cylindrical arc surface and an avoidance surface that are connected end - to - end in the circumferential direction of the transmission shaft 4. The axis of the cylindrical arc surface coincides with the rotation axis, and the central angle corresponding to the cylindrical arc surface is greater than 180°. The avoidance surface is located between the smoke - baffle 204 and the rotation axis, and the minimum distance between the rotation axis and the smoke - baffle 204 is less than the radius of the cylindrical arc surface. The transmission rod and the driving rod are both fixedly sleeved on the first shaft section, and the avoidance surface is arranged downward.

[0120] For the transmission shaft 4 with a traditional structure, the first shaft section of the transmission shaft 4 is a cylindrical structure, and the minimum distance between it and the smoke - baffle 204 should be greater than the radius of the shaft section corresponding to the smoke - baffle 204 to avoid interference between the transmission shaft 4 and the smoke - baffle 204 during rotation, that is, for the transmission shaft 4 with a traditional structure, its outer diameter is limited by the distance between its axis and the smoke - baffle 204. In this embodiment, by providing an avoidance surface on the outer wall of the transmission shaft 4, the avoidance surface faces the smoke - baffle 204 when the transmission shaft 4 rotates, so that the minimum distance between the axis of the transmission shaft 4 and the smoke - baffle 204 can be less than the radius of the corresponding shaft section of the transmission shaft 4. Thus, on the basis of the unchanged distance between the rotation axis and the smoke - baffle 204, the radius of the transmission shaft 4 can be increased, thereby increasing the structural strength and stiffness of the transmission shaft 4, reducing the degree of torsion of the transmission shaft 4 after being stressed, reducing the degree of deformation of the driven link, and reducing or eliminating the height difference on the left and right sides at the upper end after the flap assembly 1 is opened.

[0121] Preferably, the avoidance surface is formed by cutting a cylindrical shaft, and the uncut outer peripheral surface of the cylindrical shaft forms a cylindrical arc surface. This enables the transmission shaft 4 to be directly machined from the cylindrical shaft, simplifies the machining of the transmission shaft 4, and reduces the machining cost of the transmission shaft 4. In other embodiments, the transmission shaft 4 can also be directly machined to form the avoidance surface and the cylindrical arc surface by casting or other processes.

[0122] In this embodiment, the avoidance surface is a convex arc surface, and the two ends of the arc surface are smoothly connected to the two ends of the cylindrical arc surface. This can reduce the sharp corners, thereby reducing the probability of stress concentration on the first shaft segment and increasing the service life of the transmission shaft 4. In other embodiments, the avoidance surface can also be a plane.

[0123] In this embodiment, the transmission shaft 4 includes a first shaft segment and second shaft segments provided at both ends of the first shaft segment. The first shaft segment extends in the left-right direction, and the two second shaft segments are respectively rotatably connected to the two support frames 6. An avoidance surface is cut on the side wall of the first shaft segment, and the avoidance surface extends to both ends of the first shaft segment. The shaft diameter of the second shaft segment is smaller than that of the first shaft segment. The transmission rod 3 and the driving rod 7 are both fixedly sleeved on the first shaft segment.

[0124] In this embodiment, preferably, the avoidance surface is a cutting plane 411 cut on the transmission shaft 4, the cutting plane 411 extends to both ends of the transmission shaft 4, and the driving rod 7 and the transmission rod 3 are both provided with D-shaped holes adapted to the cross-section of the transmission shaft 4, and the first shaft segment 41 is inserted into the two D-shaped holes.

[0125] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A flap mechanism for a range hood, comprising a flap assembly (1) and a flap drive mechanism for driving the flap assembly (1) to flip, characterized in that, The flap driving mechanism includes: A transmission shaft (4), located on the back of the flap assembly (1) and extending in the left-right direction; A driving unit (2), driving the transmission shaft (4) to rotate about its own axis; A transmission rod (3), its first end fixedly connected to the transmission shaft (4), and its second end hinged to the flap assembly (1). The transmission rod (3) is located in the middle of the flap assembly (1) in the left-right direction. An installation hole (3114) is formed on the lower side surface of the transmission rod (3), and an electrical component is installed in the installation hole (3114).

2. The flap mechanism according to claim 1, characterized in that, The electrical component is a lighting lamp or a detection sensor, and the detection head of the detection sensor is arranged downward; And / or, the electrical component is rotatably connected to the transmission rod (3).

3. The flap mechanism according to claim 1, characterized in that, A wire routing channel is formed on the transmission rod (3), and the installation hole communicates with the wire routing channel. The wire routing channel is used for threading connecting wires.

4. The flap mechanism according to claim 3, characterized in that, A fixing structure is arranged in the wire routing channel, and the fixing structure is used for fixing the electrical component.

5. The flap mechanism according to claim 3, characterized in that, The flap assembly further includes a flipping panel (11), and a display control device (8) is arranged on the back of the flipping panel (11). The connecting wire of the display control device (8) is threaded through the wire routing channel.

6. The flap mechanism according to claim 5, characterized in that, The second end of the transmission rod (3) is located directly below the display control device (8). An inlet (3112) is formed on the upper side of the second end of the transmission rod (3) for the wire routing channel. The connecting wire penetrates into the wire routing channel from the inlet (3112).

7. The flap mechanism according to claim 6, characterized in that, The flap assembly (1) further includes a mounting plate (13) connected to the back of the flipping panel (11). The mounting plate (13) protrudes outward with a mounting box portion (132) in a direction away from the flipping panel (11). The display control device (8) is installed in the mounting box portion (132), and a wire passing port (1321) for the connecting wire to pass through is formed on the lower side wall of the mounting box portion (132).

8. The flap mechanism according to claim 6, characterized in that, The upper surface of the second end of the transmission rod (3) has an upward-opening arc surface, and the inlet (3112) is formed at the concave part of the arc surface.

9. The flap mechanism according to any one of claims 3 - 8, characterized in that, The transmission rod (3) includes a rod main body portion (311), and the rod main body portion (311) extends obliquely downward from back to front. The rear end of the rod main body portion (311) extends obliquely backward and downward with a fixing sleeve portion (312). The fixing sleeve portion (312) is sleeved on the transmission shaft (4). The wire routing channel is formed on the rod main body portion (311) and penetrates through the rear end surface of the rod main body portion (311).

10. The flap mechanism according to any one of claims 1 - 8, characterized in that, The transmission rod (3) includes a main rod body (31). Both ends of the main rod body (31) are respectively connected to the transmission shaft (4) and the flap assembly (1). The main rod body (31) is provided with a wire groove (3111) that penetrates at least one end. The mounting hole (3114) communicates with the wire groove (3111). The transmission rod (3) further includes a cover plate (32). The cover plate (32) is detachably connected to the main rod body (31) to block the side slot opening of the wire groove (3111). The cover plate (32) and the groove wall of the wire groove (3111) enclose a wire channel.

11. The flap mechanism according to claim 10, characterized in that, The wire groove (3111) is provided on the upper side surface of the main rod body (31).

12. The flap mechanism according to claim 11, characterized in that, The outer surface of the cover plate (32) is flush with the outer side surface of the main rod body (31) where the side slot opening is located; and / or, the cover plate (32) includes a sealing plate portion (321). At least one side of the sealing plate portion (321) in the width direction extends outward with a plurality of connecting plate portions (322). The main rod body (31) is provided with mounting grooves (3115). The mounting grooves (3115) are arranged in one-to-one correspondence with the connecting plate portions (322). The sealing plate portion (321) is inserted into the side slot opening. The connecting plate portions (322) extend into the mounting grooves (3115) and are connected to the bottom of the mounting grooves (3115).

13. The flap mechanism according to any one of claims 3 - 8, characterized in that, The cross-section of the connecting wire is rectangular, and the cross-section of the wire channel is a rectangular surface adapted to the connecting wire.

14. The flap mechanism according to any one of claims 1 - 8, characterized in that, The driving end of the driving unit (2) can telescopically move in a direction towards or away from the flap assembly (1). The flap driving mechanism further includes a driving rod (7). Both ends of the driving rod (7) are respectively connected to the driving end and the transmission shaft (4). The driving unit (2) drives the transmission shaft (4) to rotate through the driving rod (7).

15. The flap mechanism according to claim 14, characterized in that, The transmission shaft (4) has a first shaft section (41). A cutting plane (411) is cut on the outer wall of the first shaft section (41). The first ends of the transmission rod (3) and the driving rod (7) are both provided with D-shaped holes. The cross-sectional shape of the D-shaped holes is adapted to the cross-section of the first shaft section (41). The first shaft section (41) is inserted into the two D-shaped holes.

16. The flap mechanism according to claim 15, characterized in that, The transmission shaft (4) includes a second shaft section (42) coaxially connected to the first shaft section (41). The outer diameter of the second shaft section (42) is larger than the outer diameter of the first shaft section (41); and / or, the cutting plane (411) extends to both ends of the transmission shaft (4), and the cutting plane (411) is arranged downward.

17. The flap mechanism according to claim 14, characterized in that, The driving rod (7) is located on the left or right side of the flap assembly (1); and / or, the driving rod (7) is a solid rod.

18. The flap mechanism according to claim 17, characterized in that, The first end of the driving rod (7) has a connecting sleeve portion (72). The connecting sleeve portion (72) is fixedly sleeved on the transmission shaft (4); and / or, the second end of the driving rod (7) is provided with a U-shaped groove (71). The driving end is inserted into the U-shaped groove (71) and is rotatably connected to the opposite side groove walls of the U-shaped groove (71).

19. An oil fume suction machine, characterized in that, It includes a flap mechanism as described in any one of claims 1 to 18.

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