Improved fume hood

Abstract

An improved smoke hood includes a main body with an air inlet and a movable cover for opening or closing the air inlet. The main body also has a transmission mechanism, which includes a drive assembly, a connecting rod assembly, and a rotating plate. The drive assembly drives the connecting rod assembly, which abuts against the rotating plate, which is connected to the movable cover. When the drive assembly drives the connecting rod assembly to rotate forward, the connecting rod assembly pushes the rotating plate to rotate forward, causing the rotating plate to flip the movable cover upward, thereby opening the air inlet. The movable cover can also flip upward under external force to open the air inlet. This invention, by setting up a drive assembly, a connecting rod assembly, and a rotating plate, with the drive assembly driving the connecting rod assembly, the connecting rod assembly abutting against the rotating plate, and the rotating plate connected to the movable cover, allows the user to manually flip the movable cover upward to open the air inlet. This ensures that the air inlet can still be opened and the smoke hood can function normally even when the motor is not working.

Description

Technical Field

[0001] This utility model relates to the field of smoke hood technology, and in particular to an improved smoke hood. Background Technology

[0002] Chinese Patent Document No. CN222783561U disclosed a smoke hood on April 22, 2025, which includes a main body, a protrusion on the upper front section of the main body, a lighting device on the lower side of the protrusion, a front plate on the front side of the protrusion, an air inlet on the front plate, and an exhaust mechanism communicating with the air inlet inside the main body. The motor of the smoke hood is connected to the gearbox, and the output end of the gearbox is connected to the first end of the first hinge arm. The end of the first hinge arm is hinged to the first end of the second hinge arm via a first hinge shaft. The end of the second hinge arm is hinged to the middle section of the third hinge arm via a second hinge shaft. The first end of the third hinge arm is hinged to the main body via a third hinge shaft. The end of the third hinge arm is fixedly connected to the movable cover. The motor can drive the end of the first hinge arm and the first end of the second hinge arm to swing around the first end of the first hinge arm. The swinging of the first end of the second hinge arm around the first end of the first hinge arm can drive the third hinge arm to swing around its first end, causing the movable cover to open or close the air inlet. When the motor fails to work (motor malfunction or power outage, etc.), the air inlet cannot be opened, causing the smoke hood to malfunction.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of this utility model is to provide an improved smoke hood that is simple in structure, convenient to use, easy to operate, provides a good user experience, and is highly practical, so as to overcome the shortcomings of the prior art.

[0005] An improved smoke hood designed for this purpose includes a main body with an air inlet and a movable cover for opening or closing the air inlet. The main body is characterized by a transmission mechanism comprising a drive assembly, a connecting rod assembly, and a rotating plate. The drive assembly drives the connecting rod assembly, which abuts against the rotating plate, which is connected to the movable cover. When the drive assembly drives the connecting rod assembly to rotate forward, the connecting rod assembly pushes the rotating plate to rotate forward, causing the rotating plate to flip the movable cover upward, thereby opening the air inlet. The movable cover can flip upward under external force to open the air inlet.

[0006] The linkage assembly includes a connecting rod and a push shaft. The drive assembly drives the connecting rod to its head, and the push shaft is located at the end of the connecting rod. A convex strip is provided on the rotating plate, and the push shaft abuts against the convex strip. When the drive assembly drives the linkage assembly to rotate in the forward direction, the connecting rod pushes the convex strip through the push shaft, causing the rotating plate to rotate in the forward direction. When the drive assembly drives the linkage assembly to rotate in the reverse direction, the connecting rod drives the push shaft to rotate away from the convex strip, and the movable cover flips downward under the action of gravity, thereby closing the air inlet.

[0007] The transmission mechanism also includes a fixed plate. The drive assembly is fixed to the main body via the fixed plate. The first end of the rotating plate is rotatably connected to the fixed plate, and the last end of the rotating plate is connected to a movable cover.

[0008] A limit part is provided on the fixed plate. When the drive assembly drives the linkage assembly to rotate forward to the corresponding position, the linkage assembly abuts against the limit part.

[0009] The drive assembly includes a motor and a gearbox. The motor is connected to the input end of the gearbox, and the output end of the gearbox is connected to the end of a connecting rod.

[0010] The front side of the main body is provided with a protrusion, the air inlet is provided on the protrusion, and the rotating plate is provided with a through hole for inserting the limiting member; when the rotating plate rotates to the corresponding position in the forward direction, the through hole is located outside the main body, and when the through hole inserts the limiting member, the limiting member abuts against the protrusion.

[0011] The protrusion is provided with a clearance hole, and the rotating plate passes through the clearance hole. When the rotating plate rotates, it extends out of the main body or retracts into the main body through the clearance hole.

[0012] There are two air inlets and two movable baffles, each corresponding to the other. The air inlets are located on both sides of the protrusion. There are two sets of transmission mechanisms, and each transmission mechanism is connected to the corresponding movable baffle.

[0013] There are two air inlets and one movable cover. The width of the movable cover is the same as the width of the protrusion. The air inlets are located on both sides of the protrusion.

[0014] The main body is equipped with an exhaust mechanism that is connected to the air inlet; when the movable cover opens the air inlet, a guide cavity is formed between the movable cover and the protrusion, and the cross-sectional width of the guide cavity decreases from bottom to top.

[0015] The smoke hood of this utility model is designed with a drive assembly, a connecting rod assembly, and a rotating plate. The drive assembly drives the connecting rod assembly, the connecting rod assembly abuts against the rotating plate, and the rotating plate is connected to a movable cover. This structure allows the user to manually flip the movable cover upward to open the air inlet. In this way, even when the motor cannot work (due to motor failure or power outage, etc.), the air inlet can still be opened and the smoke hood can still work normally, greatly improving the user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the smoke collection hood in the first application example of an embodiment of this utility model.

[0017] Figure 2 This is a partial structural schematic diagram of the smoke collection hood in the first application example of an embodiment of this utility model.

[0018] Figure 3 This is a cross-sectional view of the smoke hood in the first application example of an embodiment of this utility model.

[0019] Figure 4 This is a cross-sectional view of the smoke collection hood from another angle in a first application example of an embodiment of this utility model.

[0020] Figure 5 for Figure 4 A magnified structural diagram of point A in the middle.

[0021] Figure 6 This is a schematic diagram of the overall structure of the smoke hood in the second application example of an embodiment of this utility model.

[0022] Figure 7 This is a partial structural schematic diagram of the smoke collection hood in the second application example of an embodiment of this utility model.

[0023] Figure 8 This is a schematic diagram of the overall structure of the transmission mechanism in one embodiment of the present invention.

[0024] Figure 9 This is an exploded structural diagram of the transmission mechanism in one embodiment of the present invention. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] See Figures 1-9 The improved smoke hood includes a main body 1, on which an air inlet 2 and a movable cover 3 for opening or closing the air inlet 2 are provided. The main body 1 is also provided with a transmission mechanism, which includes a drive assembly, a connecting rod assembly, and a rotating plate 4. The drive assembly drives the connecting rod assembly, the connecting rod assembly abuts against the rotating plate 4, and the rotating plate 4 is connected to the movable cover 3. When the drive assembly drives the connecting rod assembly to rotate forward, the connecting rod assembly pushes the rotating plate 4 to rotate forward, so that the rotating plate 4 drives the movable cover 3 to flip upward, thereby opening the air inlet 2. The movable cover 3 can be flipped upward under the action of external force to open the air inlet 2, that is, the movable cover 3 can be manually flipped upward.

[0027] The linkage assembly includes a connecting rod 5 and a push shaft 6. The drive assembly drives the first end of the connecting rod 5, and the push shaft 6 is located at the end of the connecting rod 5. A protrusion 7 is provided on the rotating plate 4, and the push shaft 6 abuts against the protrusion 7. When the drive assembly drives the linkage assembly to rotate in the forward direction, the connecting rod 5 pushes the protrusion 7 through the push shaft 6, so that the rotating plate 4 rotates in the forward direction. After the movable cover 3 flips upward, when the drive assembly drives the linkage assembly to rotate in the reverse direction, the connecting rod 5 drives the push shaft 6 to rotate away from the protrusion 7. At this time, the push shaft 6 does not abut against the protrusion 7, and the movable cover 3 flips downward under the action of gravity, thereby closing the air inlet 2. When the movable cover 3 flips downward, it drives the rotating plate 4 to rotate in the reverse direction. When the rotating plate 4 rotates to the corresponding position, the protrusion 7 abuts against the push shaft 6, so that the push shaft 6 abuts against the protrusion 7 again. Because the push shaft 6 abuts against the protrusion 7, the movable cover 3 is not connected to the drive assembly, so the movable cover 3 can be manually flipped upward.

[0028] Users can control the movable cover 3 to open or close the air inlet 2 through the transmission mechanism as needed, reducing the speed of dust accumulation inside the main body 1. At the same time, closing the air inlet 2 with the movable cover 3 can also make the smoke hood more aesthetically pleasing.

[0029] The transmission mechanism also includes a fixed plate 8. The drive assembly is fixed to the main body 1 through the fixed plate 8. The first end of the rotating plate 4 is rotatably connected to the fixed plate 8, and the end of the rotating plate 4 is connected to the movable cover 3.

[0030] The lower end of the fixed plate 8 is provided with a limiting part 9. When the drive assembly drives the connecting rod assembly to rotate forward to the corresponding position, the connecting rod 5 abuts against the limiting part 9 to limit the connecting rod assembly from continuing to rotate and prevent the movable cover 3 from rotating excessively upward. At this time, the movable cover 3 is opened to the maximum position.

[0031] The drive assembly includes a synchronous motor 10 and a gearbox 11. The input end of the motor 10 is connected to the gearbox 11, and the output end of the gearbox 11 is connected to the beginning of the connecting rod 5. The gearbox 11 can increase the output torque of the motor 10, and at the same time, it can control the movable cover 3 to open or close the air inlet 2 at a relatively low speed.

[0032] A protrusion 12 is provided on the front side of the main body 1, and an air inlet 2 is located on the front plate of the protrusion 12. A through hole 13 for inserting a limiting member 14 is provided on the rotating plate 4. When the rotating plate 4 rotates to the corresponding position in the forward direction, the through hole 13 is located outside the main body 1. At this time, the movable cover 3 is opened to the maximum position, and when the through hole 13 inserts the limiting member 14, the limiting member 14 abuts against the front plate of the protrusion 12 to prevent the movable cover 3 from rotating downward due to gravity. This structure is used when the movable cover 3 is manually flipped upward, because when the movable cover 3 is manually flipped upward, the movable cover 3 drives... When the rotating plate 4 rotates in the forward direction, the protrusion 7 on the rotating plate 4 disengages from the push shaft 6. Since there is no push shaft 6 to limit it, the movable cover 3 will rotate downward due to gravity. Therefore, a limiting piece 14 needs to be inserted into the through hole 13 to prevent the movable cover 3 from rotating downward due to gravity. When it is necessary to manually close the air inlet 2, the limiting piece 14 is removed from the through hole 13, and then the movable cover 3 can be manually flipped downward. When the movable cover 3 is flipped downward, it drives the rotating plate 4 to rotate in the reverse direction. When the rotating plate 4 rotates to the corresponding position, the protrusion 7 abuts against the push shaft 6. The limiting piece 14 is a pin, or chopsticks or the like can be used instead.

[0033] The protrusion 12 is provided with a clearance hole 15, and the rotating plate 4 passes through the clearance hole 15. When the rotating plate 4 rotates, it extends out of the main body 1 or retracts into the main body 1 through the clearance hole 15, thereby causing the through hole 13 to move to the outside or inside the main body 1.

[0034] like Figure 1 As shown, two air inlets 2 and two movable baffles 3 are provided, and they correspond one-to-one. The air inlets 2 are respectively located on both sides of the protrusion 12, and the movable baffles 3 are respectively located on both sides of the protrusion 12. Two sets of transmission mechanisms are provided, and the transmission mechanisms and movable baffles 3 also correspond one-to-one. Each transmission mechanism is connected to the corresponding movable baffle 3. The two movable baffles 3 can be opened individually or both can be opened as needed. When using a single-sided (left or right) stove, only the air inlet 2 on that side can be opened, while the air inlet 2 on the other side can be closed to improve ventilation efficiency and reduce energy waste. In addition, when using a single-sided stove, the load on the ventilation device can be appropriately reduced to extend the equipment life and reduce energy consumption.

[0035] Or, such as Figure 6 As shown, two air inlets 2 are provided, and a single movable cover 3 is provided. The width of the movable cover 3 is approximately the same as the width of the protrusion 12. The air inlets 2 are respectively located on both sides of the protrusion 12. The movable cover 3 is a single continuous plate shape that can continuously cover the front plate of the protrusion 12. One transmission mechanism is provided, which drives and connects to the movable cover 3. The movable cover 3 opens or closes both air inlets 2 simultaneously. This structure uses only one transmission mechanism, resulting in lower cost.

[0036] The main body 1 is equipped with an exhaust mechanism (not shown in the figure) that is connected to the air inlet 2; when the movable cover 3 opens the air inlet 2, a guide cavity 16 is formed between the movable cover 3 and the protrusion 12. The cross-sectional width of the guide cavity 16 decreases from bottom to top. The movable cover 3 can also guide the airflow so that the fumes can enter the air inlet 2 more concentratedly.

[0037] A stud 17 is provided at one end of the push shaft 6, and a mounting hole 18 is provided at the end of the connecting rod 5. After the stud 17 passes through the mounting hole 18, the first nut 19 is locked to connect the connecting rod 5 and the push shaft 6.

[0038] The rotating plate 4 has a rotating hole 20 at its head end, and the fixing plate 8 has a fixing hole 21. The stepped screw 25 has a rotating part 22 and a stud part 23. The rotating part 22 passes through the rotating hole 20 and the fixing hole 21. The stud part 23 is locked with a second nut 24 so that the stepped screw 25 is fixed on the fixing plate 8. The rotating plate 4 rotates around the stepped screw 25 through the cooperation of the rotating part 22 and the rotating hole 20.

[0039] Inner side plates 26 are respectively provided on the left and right sides of the main body 1. The connecting rod assembly and rotating plate 4 are provided on the side of the inner side plate 26 facing the inside of the main body 1. The drive assembly is provided on the side of the inner side plate 26 facing the outside of the main body 1. The fixing plate 8, the inner side plate 26 and the reduction gearbox 11 are connected by screws so that the reduction gearbox 11 is fixed on the inner side plate 26 by the fixing plate 8.

[0040] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An improved smoke hood, comprising a main body (1), wherein an air inlet (2) is provided on the main body (1) and a movable cover (3) for opening or closing the air inlet (2), characterized in that: The main body (1) is also provided with a transmission mechanism, which includes a drive assembly, a connecting rod assembly and a rotating plate (4). The drive assembly drives the connecting rod assembly, the connecting rod assembly abuts against the rotating plate (4), and the rotating plate (4) is connected to the movable cover (3). When the drive assembly drives the connecting rod assembly to rotate in the forward direction, the connecting rod assembly pushes the rotating plate (4) to rotate in the forward direction, so that the rotating plate (4) drives the movable cover (3) to flip upward, thereby opening the air inlet (2). The movable cover (3) can flip upward under the action of external force to open the air inlet (2).

2. The improved smoke hood according to claim 1, characterized in that: The linkage assembly includes a connecting rod (5) and a push shaft (6). The drive assembly drives the connecting rod (5) to the beginning and the push shaft (6) is located at the end of the connecting rod (5). A ridge (7) is provided on the rotating plate (4). The push shaft (6) abuts against the ridge (7). When the drive assembly drives the linkage assembly to rotate in the forward direction, the connecting rod (5) pushes the ridge (7) through the push shaft (6) so that the rotating plate (4) rotates in the forward direction. When the drive assembly drives the linkage assembly to rotate in the reverse direction, the connecting rod (5) drives the push shaft (6) to rotate away from the ridge (7). The movable cover (3) flips downward under the action of gravity, thereby closing the air inlet (2).

3. The improved smoke hood according to claim 1, characterized in that: The transmission mechanism also includes a fixed plate (8), the drive assembly is fixed on the main body (1) through the fixed plate (8), the head end of the rotating plate (4) is rotatably connected to the fixed plate (8), and the end of the rotating plate (4) is connected to the movable cover (3).

4. The improved smoke hood according to claim 3, characterized in that: A limiting part (9) is provided on the fixed plate (8). When the drive assembly drives the connecting rod assembly to rotate forward to the corresponding position, the connecting rod assembly abuts against the limiting part (9).

5. The improved smoke hood according to claim 2, characterized in that: The drive assembly includes a motor (10) and a gearbox (11). The input end of the motor (10) is connected to the gearbox (11), and the output end of the gearbox (11) is connected to the head end of the connecting rod (5).

6. The improved smoke hood according to claim 1, characterized in that: The front side of the main body (1) is provided with a protrusion (12), the air inlet (2) is provided on the protrusion (12), and the rotating plate (4) is provided with a through hole (13) for inserting the limiting member (14); when the rotating plate (4) rotates to the corresponding position in the forward direction, the through hole (13) is located outside the main body (1), and when the through hole (13) inserts the limiting member (14), the limiting member (14) abuts against the protrusion (12).

7. The improved smoke hood according to claim 6, characterized in that: A clearance hole (15) is provided on the protrusion (12), and the rotating piece (4) passes through the clearance hole (15). When the rotating piece (4) rotates, it extends out of the main body (1) or retracts into the main body (1) through the clearance hole (15).

8. The improved smoke hood according to claim 6, characterized in that: Two air inlets (2) and two movable baffles (3) are provided and correspond to each other. The air inlets (2) are respectively located on both sides of the protrusion (12). Two sets of transmission mechanisms are provided, and each transmission mechanism is connected to the corresponding movable baffle (3).

9. The improved smoke hood according to claim 6, characterized in that: Two air inlets (2) are provided, and a single movable cover (3) is provided. The width of the movable cover (3) is equivalent to the width of the protrusion (12). The air inlets (2) are respectively provided on both sides of the protrusion (12).

10. The improved smoke hood according to claim 6, characterized in that: The main body (1) is equipped with an exhaust mechanism that communicates with the air inlet (2); when the movable cover (3) opens the air inlet (2), a guide cavity (16) is formed between the movable cover (3) and the protrusion (12), and the cross-sectional width of the guide cavity (16) decreases from bottom to top.

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