Flexible driving mechanism of eccentric wheel and turning plate mechanism and range hood

Abstract

The utility model relates to the technical field of kitchen appliances, and discloses an eccentric wheel, a flexible driving mechanism of a turning plate mechanism and a range hood. The eccentric wheel comprises a body, the outline of the body is a spline curve, and the curvature of the spline curve changes along with rotation of the body, so that the rotation radius of the eccentric wheel changes along with changes of the rotation angle. The flexible driving mechanism of the turning plate mechanism comprises a force storage assembly and a flexible control rope, the force storage assembly comprises a force storage spring and the eccentric wheel, one end of the force storage spring is connected with the second turning plate assembly, the other end of the force storage spring is connected with the eccentric wheel, and the rotation center of the force storage spring and the rotation center of the eccentric wheel are coaxially arranged. The eccentric wheel is connected with the first turning plate assembly, the flexible control rope is connected with the eccentric wheel, and the flexible control rope can drive the eccentric wheel to rotate when tightened, so that the first turning plate assembly and the second turning plate assembly are driven to be turned over and opened successively. The eccentric wheel has the advantage of saving labor, the mechanical efficiency of a system is improved, and meanwhile the jamming phenomenon can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen appliance technical field especially, it relates to a flexible drive mechanism of eccentric wheel, flap mechanism and range hood. BACKGROUND

[0002] The range hood is the electrical equipment widely used in the kitchen, is used to discharge the oil fume produced in the cooking process. The range hood is divided into side suction type and straight suction type according to the oil fume suction mode, and in the existing side suction type range hood, the drive of flap glass usually adopts the mode of directly pushing by single side push rod motor. This mode is simple to realize, and the cost is lower, but there are some significant technical problems. First, push rod motor and hinge four-bar linkage mechanism occupy larger space, make that the hood design is not enough compact, has affected the overall aesthetic property and the flexibility of installation, and the structure is complex, once these movable parts have the problem, maintenance and cleaning work are very tedious, increase maintenance cost and time, in addition, the mode of directly pushing flap glass can generate larger noise and vibration when running, influence user's use experience.

[0003] To solve the above technical problem, some range hoods in the prior art adopt flexible drive structure or flexible transmission structure, and a wheel structure is generally used in the flexible structure, and the wheel structure is mostly circular wheel, and the circular wheel is matched with flexible control rope to realize driving or transmission effect.

[0004] Since the rotating radius of the circular wheel is the same everywhere, in the process of pulling the flap glass to overturn, larger driving force needs to be provided to realize transmission, and the mechanical efficiency is lower, and the phenomenon of jamming can also occur.

[0005] Therefore, there is an urgent need for an eccentric wheel, flexible drive mechanism of flap mechanism and range hood to solve the above technical problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing an eccentric wheel, flexible drive mechanism of flap mechanism and range hood, which is more labor-saving when the flap mechanism is opened, has high mechanical efficiency and will not jam.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] An eccentric wheel, comprising:

[0009] A body, the profile of the body is a spline curve, the curvature of the spline curve changes with the rotation of the body, so that the rotating radius of the eccentric wheel changes with the change of the rotation angle.

[0010] As an optional technical scheme of the eccentric wheel, the eccentric wheel has a first state, a second state and a third state as the eccentric wheel rotates, in the first state, the eccentric wheel has a rotation radius of r1, in the second state, the eccentric wheel has a rotation radius of r2, in the third state, the eccentric wheel has a rotation radius of r3, r3>r2>r1.

[0011] The utility model discloses still adopt following technical scheme:

[0012] A flexible drive mechanism of a flap mechanism, including force storage subassembly and flexible control rope, the force storage subassembly includes force storage clockwork and as above-mentioned eccentric wheel, one end of force storage clockwork is connected with the second flap subassembly of flap mechanism, and the other end is connected with eccentric wheel, and the rotation center of force storage clockwork and eccentric wheel is coaxial arrangement, and eccentric wheel is connected with the first flap subassembly of flap mechanism, and flexible control rope is connected with eccentric wheel, and when flexible control rope is tightened, can drive eccentric wheel rotates, thereby drives the first flap subassembly and second flap subassembly overturn open.

[0013] As an optional technical scheme of the flexible drive mechanism of the flap mechanism, the flap mechanism has a closed state, a half-open state and a fully open state; in the closed state, the distance between the rotation center of the eccentric wheel and the tangent point of the flexible control rope is x1, in the half-open state, the distance between the rotation center of the eccentric wheel and the tangent point of the flexible control rope is x2, and in the fully open state, the distance between the rotation center of the eccentric wheel and the tangent point of the flexible control rope is x3, x3>x2>x1.

[0014] As an optional technical scheme of the flexible drive mechanism of the flap mechanism, the force storage subassembly further includes a rotating shaft, the rotating shaft is arranged through and fixed to the rotation center of the eccentric wheel and is rotationally connected with the second flap subassembly, and the inner ring of the force storage clockwork is fixedly connected with the rotating shaft.

[0015] The force storage subassembly further includes a rotating shaft and a shaft sleeve, the rotating shaft is rotationally arranged through the inner hole of the shaft sleeve and is fixedly connected with the second flap subassembly, the shaft sleeve is arranged through and fixed to the rotation center of the eccentric wheel, and the inner ring of the force storage clockwork is fixedly connected with the shaft sleeve.

[0016] As an optional technical scheme of the flexible drive mechanism of the flap mechanism, the flexible drive mechanism of the flap mechanism further includes a driving assembly and a pulley assembly, the pulley assembly is connected to an external part, the pulley assembly is used for guiding the running direction of the flexible control rope, the flexible control rope is connected to the output end of the driving assembly, and the flexible control rope is connected to the eccentric wheel after passing through the pulley assembly.

[0017] As an optional technical scheme of the flexible driving mechanism of the turnover plate mechanism, the pulley assembly comprises a first pulley and a second pulley, the first pulley is arranged between the driving assembly and the second pulley, the central axis of the first pulley is arranged at an angle with the central axis of the second pulley, the first pulley is used for changing the running direction of the flexible control rope, the extension direction of the central axis of the second pulley is parallel to the extension direction of the rotation center of the force storage assembly, and the flexible control rope is connected to the eccentric wheel after passing through the first pulley and the second pulley in sequence.

[0018] As an optional technical scheme of the flexible driving mechanism of the turnover plate mechanism, in the closed state, the radius of the second pulley is greater than x1, so that the flexible control rope between the second pulley and the eccentric wheel is arranged at an angle with the plane where the second turnover plate assembly is located.

[0019] The utility model discloses still adopt following technical scheme:

[0020] A range hood, including the casing, be provided with the smoke inlet on the casing;

[0021] The range hood further includes:

[0022] Turnover plate mechanism for opening or closing the smoke inlet, the turnover plate mechanism includes the first turnover plate component and the second turnover plate component of transmission connection, the second turnover plate component is connected with the casing, and the first turnover plate component is connected in the lower end of the second turnover plate component.

[0023] As the flexible driving mechanism of the turnover plate mechanism, when the flexible control rope of the flexible driving mechanism of the turnover plate mechanism is tightened, the first turnover plate component and the second turnover plate component can be turned over and opened in sequence.

[0024] The utility model discloses still adopt following technical scheme:

[0025] A range hood, including the casing, be provided with the smoke inlet on the casing;

[0026] The range hood further includes:

[0027] Turnover plate mechanism for opening or closing the smoke inlet, the turnover plate mechanism includes the first turnover plate component and the second turnover plate component of transmission connection, the second turnover plate component is connected with the casing, and the first turnover plate component is connected in the lower end of the second turnover plate component.

[0028] The flexible driving mechanism of the flap mechanism is arranged in the interior of the shell, and further comprises a transmission assembly, one end of the transmission assembly is connected with the shell, and the other end is connected with the second flap assembly, the flexible control rope is connected with the eccentric wheel after penetrating through the transmission assembly, and the flexible control rope can drive the transmission assembly and the eccentric wheel to rotate synchronously when the flexible control rope is tightened, so as to drive the first flap assembly and the second flap assembly to be opened by turning over at the same time.

[0029] The utility model discloses beneficial effect is:

[0030] The utility model discloses provided eccentric wheel includes the body, the outline of body is the spline curve, and the curvature of spline curve changes along with the rotation of body, thereby make the rotation radius of eccentric wheel change along with the change of rotation angle. The flexible driving mechanism of the flap mechanism provided by the utility model includes a force storage assembly and a flexible control rope, the force storage assembly includes a force storage spring and the above-mentioned eccentric wheel, one end of the force storage spring is connected with the second flap assembly, the other end is connected with the eccentric wheel, the eccentric wheel is connected with the first flap assembly, the flexible control rope is connected with the eccentric wheel, and the flexible control rope can drive the eccentric wheel to rotate when the flexible control rope is tightened, so as to drive the first flap assembly and the second flap assembly to be opened by turning over in succession. The eccentric wheel of the structure has the advantage of saving labor, is easier to overcome the dead point when winding the flexible control rope, improves the mechanical efficiency of the system, and simultaneously can avoid the occurrence of jamming phenomenon, improves the use experience of user. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the cross section structure schematic drawing of range hood under the closing state provided by the utility model embodiment one;

[0032] Figure 2 It is the working state schematic drawing of eccentric wheel of range hood under the closing state provided by the utility model embodiment one;

[0033] Figure 3 It is the structure schematic drawing of range hood after removing the shell whole machine back provided by the utility model embodiment one;

[0034] Figure 4 It is the structure schematic drawing of partial structure of range hood provided by the utility model embodiment one;

[0035] Figure 5 It is the cross section structure schematic drawing of range hood under the half open state provided by the utility model embodiment one;

[0036] Figure 6 It is the working state schematic drawing of eccentric wheel of range hood under the half open state provided by the utility model embodiment one;

[0037] Figure 7is the top sectional view of the range hood in the half-open state provided by the embodiment one of the utility model;

[0038] Figure 8 is the structural schematic view of the range hood in the half-open state provided by the embodiment one of the utility model;

[0039] Figure 9 is the sectional structure schematic view of the range hood in the fully open state provided by the embodiment one of the utility model;

[0040] Figure 10 is the working state schematic view of the eccentric wheel of the range hood in the fully open state provided by the embodiment one of the utility model;

[0041] Figure 11 is the top sectional view of the range hood in the fully open state provided by the embodiment one of the utility model;

[0042] Figure 12 is the structural schematic view of the range hood in the fully open state provided by the embodiment one of the utility model;

[0043] Figure 13 is Figure 12 the local enlarged view of A in the middle;

[0044] Figure 14 is the structural schematic view of the eccentric wheel and the shaft sleeve provided by the embodiment one of the utility model;

[0045] Figure 15 is the assembly relationship schematic view of the partial structure of the force storage assembly provided by the embodiment one of the utility model;

[0046] Figure 16 is the sectional view of the partial structure of the force storage assembly provided by the embodiment one of the utility model;

[0047] Figure 17 is the sectional structure schematic view of the range hood in the fully open state provided by the embodiment two of the utility model.

[0048] in the drawing:

[0049] 1, the shell;

[0050] 2, the first flap assembly;

[0051] 3, the second flap assembly;

[0052] 4, the driving assembly;41, motor;42, take-up wheel;

[0053] 51, the first pulley;52, the second pulley;

[0054] 61, force storage spring; 62, eccentric wheel; 63, connecting rod; 64, decorative shaft; 65, rotating shaft; 66, shaft sleeve; 621, groove; 622, reinforcing rib;

[0055] 7, flexible control rope;

[0056] 8, tensioning wheel;

[0057] 9, elastic tensioning member;

[0058] 10, side plate;

[0059] 100, transmission assembly. DETAILED DESCRIPTION

[0060] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these details under other conditions and / or methods. Therefore, the specific embodiments disclosed below are not intended to limit the scope of the present application, but merely to describe a way of practicing the present application.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0062] In addition, the terms "first", "second", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0066] Example 1

[0067] like Figure 1 and Figure 2 As shown, this embodiment provides an eccentric wheel 62, which includes a body whose contour is a spline curve. The curvature of the spline curve changes with the rotation of the body, thereby causing the rotation radius of the eccentric wheel 62 to change with the rotation angle. When this eccentric wheel is applied in a flexible drive mechanism or flexible transmission mechanism, it has the advantage of saving effort, which is beneficial to improving mechanical efficiency and preventing jamming.

[0068] Specifically, as the eccentric wheel 62 rotates, it has three states: a first state, a second state, and a third state. In the first state, the radius of rotation of the eccentric wheel 62 is r1; in the second state, it is r2; and in the third state, it is r3, where r3 > r2 > r1. Therefore, as the eccentric wheel 62 rotates, its radius of rotation gradually increases. According to the lever principle, an increase in the lever arm results in a decrease in force; thus, the eccentric wheel 62 has the advantage of saving effort.

[0069] This embodiment also provides a range hood that is compact in structure, easy to maintain, runs smoothly, and is highly efficient. For example... Figures 1 to 16 As shown, the range hood includes a housing 1, a flip-plate mechanism, and a flexible drive mechanism for the flip-plate mechanism. The housing 1 is provided with a smoke inlet. The flip-plate mechanism is used to open or close the smoke inlet. The flip-plate mechanism includes a first flip-plate assembly 2 and a second flip-plate assembly 3 that are connected by a transmission. The second flip-plate assembly 3 is connected to the housing 1, and the first flip-plate assembly 2 is connected to the lower end of the second flip-plate assembly 3. When the flexible control rope 7 of the flexible drive mechanism of the flip-plate mechanism is tightened, it can drive the first flip-plate assembly 2 and the second flip-plate assembly 3 to flip and open in sequence.

[0070] Specifically, the flexible drive mechanism of the flip-plate mechanism includes a power storage component and a flexible control rope 7. One end of the power storage component is connected to the second flip-plate component 3, and the other end is connected to the first flip-plate component 2. The flexible control rope 7 is connected to the power storage component. When the flexible control rope 7 is tightened, it can drive the first flip-plate component 2 and the second flip-plate component 3 to flip open sequentially, with a unique flip-plate sequence. In this embodiment, the smoke inlet faces forward (in this embodiment, the descriptions of front, back, left, right, up, and down directions are all relative to the user when the range hood is in use).

[0071] The power storage assembly includes a power storage spring 61 and the aforementioned eccentric wheel 62. One end of the power storage spring 61 is connected to the second flap assembly 3, and the other end is connected to the eccentric wheel 62. The rotation centers of the power storage spring 61 and the eccentric wheel 62 are coaxially arranged. The eccentric wheel 62 is connected to the first flap assembly 2. The flexible control rope 7 is connected to the eccentric wheel 62. When the flexible control rope 7 is tightened, it can drive the eccentric wheel 62 to rotate, thereby driving the first flap assembly 2 and the second flap assembly 3 to flip open in sequence. The flipping sequence is unique.

[0072] Compared with the technical problems existing in the driving of the flap mechanism of the side suction type range hood in the prior art, the range hood adopts a flexible driving mechanism, instead of the traditional single-side push rod motor direct pushing mode, realizes stable overturning of the flap mechanism, has compact structure, occupies small space, and simplifies the driving mode, facilitating quick maintenance and cleaning; in addition, noise and vibration in the running process are effectively reduced, and the use experience of users is improved. The flexible driving mechanism adopts the eccentric wheel 62 with the above structure, which is more easy to overcome the dead point when winding the flexible control rope 7, has the advantage of saving labor, improves the mechanical efficiency of the system, and can also avoid the occurrence of the jamming phenomenon.

[0073] As shown in Figure 2 , Figure 6 and Figure 10 , the core feature of the eccentric wheel 62 is that the wheel shaft is eccentrically designed, so that the rotation radius of the eccentric wheel 62 changes with the angle.

[0074] Specifically, the flap mechanism has a closed state, a half-open state in which only the first flap assembly 2 is opened, and a fully open state in which the first flap assembly 2 and the second flap assembly 3 are both opened; in the closed state, as shown in Figure 2 , the distance between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7 is x1, in the half-open state, as shown in Figure 6 , the distance between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7 is x2, and in the fully open state, as shown in Figure 10 , the distance between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7 is x3, x3>x2>x1. It should be noted that the distance between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7 is the rotation radius of the eccentric wheel 62.

[0075] In the closed state of the flap mechanism, the rotation radius of the eccentric wheel 62 is the smallest, and gradually increases with the rotation of the eccentric wheel 62. This design provides the advantage of saving labor when opening the flap mechanism. When the eccentric wheel 62 starts to rotate, the increase of its rotation radius means that the pulling point of the flexible control rope 7 is farther away from the shaft center, which makes the force required to open the flap mechanism smaller according to the principle of lever, thereby improving the mechanical efficiency of the system. With the continuous rotation of the eccentric wheel 62, the increase of the wheel diameter not only helps to save labor, but also realizes the control of the opening and closing speed, realizes more precise control, and helps to reduce the vibration of the flap mechanism in the opening process, realizes more stable and precise control.

[0076] Optionally, as shown in Figure 13 and Figure 14As shown, the outer circumferential surface of the body of the eccentric wheel 62 is provided with a groove 621 for accommodating the flexible control rope 7, which has a guiding and limiting effect on the flexible control rope 7. The flexible control rope 7 is accommodated in the groove 621, which can prevent the flexible control rope 7 from deviating from or even disengaging from the surface of the eccentric wheel 62 when being tightened or loosened, thereby ensuring the stable reliability of the driving force of the flexible control rope 7 on the eccentric wheel.

[0077] In one possible implementation, as shown in Figure 13 The force storage assembly further includes a rotating shaft 65, which is arranged through the rotation center of the eccentric wheel 62 and is rotationally connected with the second flap assembly 3, and the inner ring of the force storage spring 61 is fixedly connected with the rotating shaft 65. Under the pulling force of the flexible control rope 7, the eccentric wheel 62 and the force storage spring 61 rotate relative to the second flap assembly 3 through the rotating shaft 65, thereby driving the first flap assembly 2 to flip.

[0078] In another possible implementation, as shown in Figure 15 and Figure 16 The force storage assembly further includes a rotating shaft 65 and a shaft sleeve 66, the rotating shaft 65 is rotationally arranged through the inner hole of the shaft sleeve 66 and is fixedly connected with the second flap assembly 3, the shaft sleeve 66 is arranged through and fixed to the rotation center of the eccentric wheel 62, and the inner ring of the force storage spring 61 is fixedly connected with the shaft sleeve 66. Under the pulling force of the flexible control rope 7, the eccentric wheel 62 and the force storage spring 61 rotate relative to the rotating shaft 65 and the second flap assembly 3 through the shaft sleeve 66, thereby driving the first flap assembly 2 to flip. The shaft sleeve 66 can protect the rotating shaft 65, effectively avoid the wear and friction of the rotating shaft 65, reduce energy loss, ensure stability and efficiency, and facilitate replacement of the shaft sleeve 66 after wear, thereby reducing maintenance costs.

[0079] Optionally, the shaft sleeve 66 and the eccentric wheel 62 can be integrally formed, which is convenient to process and has high structural stability. The shaft sleeve 66 and the eccentric wheel 62 can also be fixedly connected, for example, welded, interference connected, or connected through a pin shaft, and the like, which will not be enumerated one by one in the present embodiment.

[0080] As shown in Figure 14 When the shaft sleeve 66 and the eccentric wheel 62 are integrally formed, the eccentric wheel 62 can further include a reinforcing rib 622, one end of which is connected with the shaft sleeve 66 and the other end of which is connected with the body of the eccentric wheel 62. The reinforcing rib 622 can improve the structural strength of the eccentric wheel 62 as a whole, while ensuring the connection stability of the eccentric wheel 62 and the shaft sleeve 66, thereby improving the reliability of the rotation of the eccentric wheel 62 and prolonging the service life.

[0081] The flexible driving mechanism of the turning plate mechanism in the embodiment further comprises a driving assembly 4 and a pulley assembly, the driving assembly 4 is arranged inside the shell 1, the pulley assembly is connected to the shell 1, the pulley assembly is used to guide the running direction of the flexible control rope 7, the flexible control rope 7 is connected to the output end of the driving assembly 4, and the flexible control rope 7 is connected to the eccentric wheel 62 after passing through the pulley assembly.

[0082] The driving assembly 4 comprises a motor 41 and a take-up wheel 42, the take-up wheel 42 is connected to the output shaft of the motor 41, the flexible control rope 7 is connected to the take-up wheel 42, the motor 41 is started, the take-up wheel 42 rotates, and thus the flexible control rope 7 is tightened or loosened. The motor 41 transmits power through the flexible control rope 7, when the motor 41 starts to work, the flexible control rope 7 will be retracted according to the rotating direction of the motor 41, so as to pull the turning plate mechanism to open.

[0083] As shown in Figure 3 and Figure 4 , the turning plate mechanism is respectively provided with a flexible driving mechanism on the left side and the right side, the two flexible driving mechanisms share one driving assembly 4, the flexible driving mechanism further comprises a tensioner 8, the driving assembly 4 is located at the central position inside the shell 1, one tensioner 8, one force storage assembly and one flexible control rope 7 are respectively arranged on the two sides of the driving assembly 4, the tensioner 8 is arranged between the driving assembly 4 and the force storage assembly, and the two flexible control ropes 7 pass through above and below the tensioner 8 and press against the surface of the tensioner 8, that is, one flexible control rope 7 passes through above the tensioner 8 on the same side, and the other flexible control rope 7 passes through below the tensioner 8 on the same side. Through the reasonable arrangement of the tensioner 8, the constant tension of the flexible control rope 7 is ensured, so that the flexible control rope 7 can be uniformly tightened or loosened under the driving of the driving assembly 4, the problem of system instability caused by inconsistent tension is avoided, and the stable reliability of the turning plate mechanism is ensured.

[0084] The tensioners 8 on the two sides of the motor 41 ensure the synchronous driving of the two flexible control ropes 7, realize the accurate control of the turning plate mechanism, ensure the stable opening and closing of the turning plate mechanism, and improve the system stability.

[0085] The pulley assembly in the embodiment comprises a first pulley 51 and a second pulley 52, the first pulley 51 is arranged between the driving assembly 4 and the second pulley 52, the central axis of the first pulley 51 is arranged at an angle with the central axis of the second pulley 52, the extension direction of the central axis of the second pulley 52 is parallel to the extension direction of the rotation center of the force storage assembly, the first pulley 51 is used to change the running direction of the flexible control rope 7, the second pulley 52 is used to pull the load, and the flexible control rope 7 is connected to the eccentric wheel 62 after passing through the first pulley 51 and the second pulley 52 in sequence. Since the flexible control rope 7 extends horizontally inside the shell 1, and the force exerted on the flap mechanism is in the vertical direction, in order to realize the force exertion and driving effect of the flexible control rope 7 on the flap mechanism, the first pulley 51 is used as a direction-changing wheel to change the running direction of the flexible control rope 7, and the flexible control rope 7 is directly connected to the force storage assembly after turning through the second pulley 52 after turning through the first pulley 51. The force transmission of the flexible control rope 7 is simply and effectively realized by the two pulleys, the structure is simple, and the realization and maintenance are easy. In the embodiment, the fulcrum of the flexible control rope 7 is located at the top of the shell 1, therefore, the second pulley 52 is arranged at the top of the shell 1, and the driving assembly 4 is located below the top of the shell 1, therefore, the first pulley 51 is not arranged horizontally, but is arranged at an angle upward, so that the flexible control rope 7 extends upwardly and obliquely after passing through the first pulley 51.

[0086] Some existing oil fume exhaustors adopt flexible driving structures, but the flexible control rope 7 as a sliding driving component still needs to cooperate with a rotating driving component, which not only increases the complexity of the structure, but also may cause the driving efficiency to be reduced. In the embodiment, as shown in Figure 8 , the second pulley 52 is at least partially located outside the second flap assembly 3, so that the flexible control rope 7 between the second pulley 52 and the force storage assembly is located outside the second flap assembly 3, that is, the flexible control rope 7 is located outside the second flap assembly 3 after passing through the second pulley 52. The structure arrangement makes the path of the flexible control rope 7 direct and effective, thereby effectively improving the driving efficiency of the driving assembly 4.

[0087] Optionally, in the closed state, the radius of the second pulley 52 is slightly larger than the distance x1 between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7, that is, the rotation radius of the eccentric wheel 62, and the upper and lower wheel sets are designed in this way, so that the flexible control rope 7 between the second pulley 52 and the eccentric wheel 62 has a certain angle with the plane where the second flap assembly 3 is located. Avoiding the flexible control rope 7 passing through the second pulley 52 to be parallel to the second flap assembly 3, thereby preventing the occurrence of the jamming phenomenon.

[0088] In order to solve the problem that the flap mechanism has a fixed turning angle, as shown in Figure 1 , Figure 5 and Figure 9As shown, the second pulley 52 comprises a second pulley body and a fixed-angle hinge arranged integrally, the second flap assembly 3 is rotatably connected to the shell 1 through the fixed-angle hinge, the second pulley body is arranged outside the fixed-angle hinge, the flexible control rope 7 is wound on the second pulley body, and the fixed-angle hinge will stop rotating after rotating to a set angle to limit the turning angle of the second flap assembly 3. The second flap assembly 3 is equipped with a fixed-angle hinge, and the turning angle will stop rotating after reaching the set angle, thereby ensuring that the second flap assembly 3 can be accurately stopped at the predetermined position. It should be noted that the fixed-angle hinge is a structure known in the prior art, and its specific structure will not be described here. The second pulley body and the fixed-angle hinge are made into an integral structure, which not only reduces the number of parts and improves the compactness of the structure, but also improves the consistency and controllability of the flap mechanism movement.

[0089] In the present embodiment, the closing and opening of the first flap assembly 2 both depend on the left and right force storage assemblies. The flexible control rope 7 is connected to the eccentric wheel 62 directly after being turned by the first pulley 51 and then by the second pulley 52. When the motor 41 starts to rotate, the flexible control rope 7 will contract according to the rotation direction of the motor 41, thereby pulling the first flap assembly 2 to open.

[0090] In the present embodiment, the range hood further comprises a decorative central shaft 64 arranged outside the flap mechanism, the decorative central shaft 64 is arranged between the first flap assembly 2 and the second flap assembly 3, and is used to shield the gap between the first flap assembly 2 and the second flap assembly 3, so as to ensure that the first flap assembly 2 and the second flap assembly 3 will not expose the internal structure when rotating, and the appearance can be improved.

[0091] As shown in Figure 1 , Figure 2 , Figure 6 and Figure 10 , the force storage assembly in the present embodiment further comprises a connecting rod 63, one end of the connecting rod 63 is connected to the body of the eccentric wheel 62, and the other end is connected to the first flap assembly 2. By arranging the connecting rod 63, the eccentric wheel 62 can drive the first flap assembly 2 to rotate. The connecting rod 63 can be but is not limited to L-shaped or inverted C-shaped, as long as it can convert the rotation of the eccentric wheel 62 into the rotation of the first flap assembly 2.

[0092] Optionally, the connecting rod 63 and the body of the eccentric wheel 62 are an integral structure. The structure is simplified, and assembly and processing are facilitated.

[0093] The range hood in the embodiment further comprises an elastic tensioning member 9, one end of which is connected to the housing 1 and the other end of which is connected to the second flap assembly 3. In the process of the flap mechanism from the closed state to the half-open state, the elastic tensioning member 9 can keep the second flap assembly 3 from moving; in the process of the flap mechanism from the half-open state to the fully open state, the force of the driving assembly 4 is greater than the tensioning force of the elastic tensioning member 9, so that the flexible control rope 7 drives the second flap assembly 3 to turn outward through the force storage assembly. When the flap mechanism is closed from the fully open state, the elastic tensioning member 9 provides a restoring force to the second flap assembly 3, which can improve the speed of the second flap assembly 3 turning inward, speed up the closing process of the flap mechanism, and also can tighten the second flap assembly 3 in the closed state, ensuring that there is no gap between the second flap assembly 3 and the housing 1, improving the appearance, and also preventing dust and oil fume from entering the inside of the housing 1.

[0094] Optionally, the range hood further comprises a side plate 10, one end of which is fixedly connected to the second flap assembly 3 and the other end of which is connected to the elastic tensioning member 9, and the elastic tensioning member 9 pulls the second flap assembly 3 through the side plate 10. In the embodiment, two side plates 10 are provided, and two elastic tensioning members 9 are also provided, which are respectively arranged on the left and right sides of the second flap assembly 3. When the motor 41 works, the flexible control ropes 7 on both sides are simultaneously tightened or loosened, thereby realizing the synchronous driving of the two side plates 10, and the two side plates 10 drive the second flap assembly 3 to move.

[0095] The above structure makes the opening and closing of the second flap assembly 3 more stable, and can avoid the second flap assembly 3 being not flat on the left and right sides after being closed and having a gap with the housing 1, thereby improving the appearance of the range hood. When the flap mechanism is closed, the second flap assembly 3 is kept in the closed state through the two elastic tensioning members 9 connected to the side plate 10. When the elastic force of the elastic tensioning member 9 is overcome by the force applied by the motor 41 through the flexible control rope 7, the second flap assembly 3 starts to turn outward.

[0096] The elastic tensioning member 9 in the embodiment can be, but is not limited to, a tension spring, and in other embodiments can also be an electromagnetic lock or a micro switch.

[0097] In the embodiment, the first flap assembly 2 comprises a first flap assembly body and a first decorative plate, and the first decorative plate covers the outer surface of the first flap assembly body. The first flap assembly body can be made of sheet metal with good strength, thereby ensuring the overall structural strength of the first flap assembly 2. The first decorative plate can be made of glass, which is not only beautiful but also easy to clean. Optionally, the first flap assembly body and the first decorative plate can be fixed by adhesion.

[0098] Similarly, the second flap assembly 3 comprises a second flap assembly body and a second decorative plate covering the outer surface of the second flap assembly body. The second flap assembly body can be made of sheet metal with good strength, thereby ensuring the overall structural strength of the second flap assembly 3. The second decorative plate can be made of glass, which is not only beautiful but also easy to clean. Alternatively, the second flap assembly body and the second decorative plate can be fixed by bonding.

[0099] The opening process of the flap mechanism of the present range hood will be briefly described below.

[0100] The motor 41 is started, and the motor 41 transmits power through two flexible control ropes 7. When the flexible control ropes 7 contract, the eccentric wheel 62 rotates, driving the connecting rod 63 to rotate. When the contraction force of the flexible control ropes 7 is greater than the preset force of the power spring 61, the first flap assembly 2 opens. As the first flap assembly 2 opens, the power spring 61 gradually tightens until it reaches its contraction limit, at which point the first flap assembly 2 stops rotating, at which point the flap mechanism is in a half-open state, as shown in Figures 5 to 8 The flexible control ropes 7 continue to contract, transmitting power to the second flap assembly 3. The second flap assembly 3 is kept in a closed state by two elastic tensioning elements 9 connected by the side plate 10. When the elastic force of the elastic tensioning elements 9 is overcome by the force applied by the motor 41 through the flexible control ropes 7, the second flap assembly 3 begins to open. The second flap assembly 3 is equipped with a fixed-angle hinge, and the second flap assembly 3 stops rotating after reaching the set angle, ensuring that the second flap assembly 3 can be accurately stopped at the predetermined position, at which point the flap mechanism is in a fully open state, as shown in Figures 9 to 12 When the second flap assembly 3 is rotated to the position, the motor 41 receives a signal to stop rotating and lock the current position to maintain the stability of the flap mechanism.

[0101] The range hood in the present embodiment uses a motor 41 in combination with flexible control ropes 7 and pulley assemblies, replacing the traditional direct pushing method of a push rod motor, to achieve smooth flipping of the flap mechanism. Through the compact design of the flexible control ropes 7 and pulley assemblies, the size of the mechanism is effectively reduced, solving the problem of occupying a large space. At the same time, the simplified driving method simplifies the structure, facilitating quick maintenance and cleaning, improving the stability of the flap, and reducing noise and vibration during operation. In addition, through the reasonable arrangement of the tensioning wheels 8, the constant tension of the flexible control ropes 7 is ensured, avoiding the problem of system instability caused by inconsistent tension. The flexible driving mechanism of the range hood uses the above-mentioned structure of the eccentric wheel, which is easier to overcome the dead point when winding the flexible control ropes 7, has the advantage of saving labor, improves the mechanical efficiency of the system, and also avoids the occurrence of jamming. The range hood also includes a fixed-angle hinge and a power spring 61 contraction limit design, ensuring the accurate stopping of the flap mechanism at the required position, thereby optimizing the user experience.

[0102] Example 2

[0103] This embodiment provides a range hood, which differs from the range hood in Embodiment 1 above in that:

[0104] like Figure 17 As shown, the flexible drive mechanism of the flip-plate mechanism of the range hood is located inside the housing 1. The flexible drive mechanism of the flip-plate mechanism also includes a transmission component 100. One end of the transmission component 100 is connected to the housing 1, and the other end is connected to the second flip-plate component 3. The flexible control rope 7 passes through the transmission component 100 and is connected to the eccentric wheel 62. When the flexible control rope 7 is tightened, it can drive the transmission component 100 and the eccentric wheel 62 to rotate synchronously, thereby driving the first flip-plate component 2 and the second flip-plate component 3 to flip open simultaneously.

[0105] In addition to the beneficial effects of Embodiment 1, the flexible drive mechanism of the range hood provided in this embodiment is hidden inside the housing, achieving a neat and beautiful appearance and effective use of space. It also simplifies the maintenance process, reduces the difficulty of cleaning, and further enhances the user experience.

[0106] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made 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. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0107] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An eccentric wheel, characterized in that The body has a profile of a spline curve, the curvature of which changes with the rotation of the body, so that the rotation radius of the eccentric wheel (62) changes with the rotation angle. The eccentric wheel (62) has a first state, a second state and a third state with the rotation of the eccentric wheel (62), in the first state, the rotation radius of the eccentric wheel (62) is r1, in the second state, the rotation radius of the eccentric wheel (62) is r2, in the third state, the rotation radius of the eccentric wheel (62) is r3, r3>r2>r1. The flexible control rope (7) is connected with the eccentric wheel (62), and the flexible control rope (7) can drive the eccentric wheel (62) to rotate when it is tightened, so as to drive the first flap assembly (2) and the second flap assembly (3) to open.

2. A flexible drive mechanism for a flap mechanism, characterized in that 3. The flexible driving mechanism of the flap mechanism according to claim 2, wherein The flap mechanism has a closed state, a half-open state and a fully open state; In the closed state, the distance between the rotation center of the eccentric wheel (62) and the tangent point of the flexible control rope (7) is x1, in the half-open state, the distance between the rotation center of the eccentric wheel (62) and the tangent point of the flexible control rope (7) is x2, in the fully open state, the distance between the rotation center of the eccentric wheel (62) and the tangent point of the flexible control rope (7) is x3, x3>x2>x1.

4. The flexible driving mechanism of the flap mechanism according to claim 2, wherein The power storage assembly further comprises a rotating shaft (65), the rotating shaft (65) is arranged through and fixed to the rotation center of the eccentric wheel (62) and is rotationally connected with the second flap assembly (3), and the inner ring of the power storage spring (61) is fixedly connected with the rotating shaft (65); or The power storage assembly further comprises a rotating shaft (65) and a shaft sleeve (66), the rotating shaft (65) is rotationally arranged through the inner hole of the shaft sleeve (66) and is fixedly connected with the second flap assembly (3), the shaft sleeve (66) is arranged through and fixed to the rotation center of the eccentric wheel (62), and the inner ring of the power storage spring (61) is fixedly connected with the shaft sleeve (66).

5. The flexible driving mechanism of the flap mechanism according to claim 3, wherein ​ The flexible drive mechanism of the flap mechanism further comprises a drive assembly (4) and a pulley assembly connected to the outer part, the pulley assembly is used to guide the direction of the flexible control rope (7), the flexible control rope (7) is connected to the output end of the drive assembly (4), and the flexible control rope (7) is connected to the eccentric wheel (62) after passing through the pulley assembly.

6. The flexible drive mechanism of the flap mechanism according to claim 5, wherein the pulley assembly comprises a first pulley (51) and a second pulley (52), the first pulley (51) is arranged between the drive assembly (4) and the second pulley (52), the central axis of the first pulley (51) is arranged at an angle with the central axis of the second pulley (52), the first pulley (51) is used to change the direction of the flexible control rope (7), the extension direction of the central axis of the second pulley (52) is parallel to the extension direction of the rotation center of the force storage assembly, and the flexible control rope (7) is sequentially connected to the eccentric wheel (62) after passing through the first pulley (51) and the second pulley (52).

7. The flexible drive mechanism of the flap mechanism according to claim 6, wherein in the closed state, the radius of the second pulley (52) is greater than x1, so that the flexible control rope (7) between the second pulley (52) and the eccentric wheel (62) is arranged at an angle with the plane where the second flap assembly (3) is located.

8. A range hood, comprising a housing (1), wherein an air inlet is arranged on the housing (1); The range hood further comprises: a flap mechanism for opening or closing the air inlet, the flap mechanism comprises a first flap assembly (2) and a second flap assembly (3) in transmission connection, the second flap assembly (3) is connected with the housing (1), and the first flap assembly (2) is connected at the lower end of the second flap assembly (3); and characterized in that The flexible drive mechanism of the flap mechanism according to any one of claims 2-7, when the flexible control rope (7) of the flexible drive mechanism of the flap mechanism is tightened, the first flap assembly (2) and the second flap assembly (3) can be driven to open in turn.

9. A range hood, comprising a housing (1), wherein an air inlet is arranged on the housing (1); The range hood further comprises: a flap mechanism for opening or closing the air inlet, the flap mechanism comprises a first flap assembly (2) and a second flap assembly (3) in transmission connection, the second flap assembly (3) is connected with the housing (1), and the first flap assembly (2) is connected at the lower end of the second flap assembly (3); and characterized in that The flexible drive mechanism of the flap mechanism according to any one of claims 2-7, when the flexible control rope (7) of the flexible drive mechanism of the flap mechanism is tightened, the first flap assembly (2) and the second flap assembly (3) can be driven to open in turn. ​ The flexible driving mechanism of the flap mechanism according to any one of claims 2-7, which is arranged inside the shell (1), further comprising a transmission assembly, one end of the transmission assembly being connected with the shell (1), and the other end being connected with the second flap assembly (3), the flexible control rope (7) being connected with the eccentric wheel (62) after passing through the transmission assembly, the flexible control rope (7) being capable of driving the transmission assembly and the eccentric wheel (62) to rotate synchronously when the flexible control rope (7) is tightened, thereby driving the first flap assembly (2) and the second flap assembly (3) to open at the same time.

Images