Driving mechanism of electric smoke deflector of range hood and driving method of driving mechanism
By employing a drive mechanism with a sliding engagement between a connecting rod and a guide shaft on the range hood's smoke guide plate, the lever arm of the driving force is changed, thus solving the problem of high load in the initial stage of the smoke guide plate and achieving low-cost, low-noise, and low-energy-consumption smoke guide plate drive.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-25
- Publication Date
- 2026-03-17
AI Technical Summary
The existing drive mechanism for range hood smoke guide plates has a fixed drive arm, resulting in a large initial load and requiring the use of a high-power geared motor, which leads to high cost, noise, and energy consumption issues.
The drive mechanism adopts a sliding engagement between the connecting rod and the guide shaft. By sliding the groove relative to the guide shaft, the lever arm of the driving force is changed, reducing the driving torque requirement in the initial stage, and a low-power geared motor is used.
It reduces the initial driving torque requirement of the smoke guide plate, reduces motor selection costs, lowers noise and energy consumption, and improves the reliability and applicability of the drive mechanism.
Smart Images
Figure CN121676751A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of range hood, in particular to a driving mechanism of electric smoke guide plate of range hood and a driving method thereof. BACKGROUND
[0002] In the existing range hood, the smoke guide plate is usually arranged at the air inlet of the range hood, which is used to expand to guide the oil fume into the air duct when the range hood works, and to close to keep the appearance neat when it does not work.
[0003] In the prior art, the smoke guide plate is usually driven by a reduction motor, and the driving shaft of the reduction motor is usually fixedly connected with the hinge arm of the smoke guide plate through a connecting rod or directly, so that the smoke guide plate rotates around the hinge point to complete the opening or closing action.
[0004] However, the above driving method has the following defects: 1. The driving force arm is fixed: since the driving shaft of the reduction motor is rigidly connected with the hinge arm of the smoke guide plate, the driving force arm remains unchanged during the whole rotation of the smoke guide plate.
[0005] 2. The load is large at the initial stage of opening or closing: at the initial stage of opening or closing of the smoke guide plate, the required gravity moment and resistance moment of the smoke guide plate are large, and the reduction motor needs to provide a high starting torque.
[0006] 3. The motor selection is limited: in order to meet the requirement of starting torque, a reduction motor with large power is usually selected, which not only increases the cost, but also may cause noise and energy consumption problems, so it is necessary to make further improvement. SUMMARY
[0007] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a driving mechanism of electric smoke guide plate of range hood, which has simple structure, low manufacturing cost, and can effectively reduce the requirement of output torque of the reduction motor at the initial stage of driving.
[0008] The purpose of the present application is achieved in the following way: a driving mechanism of electric smoke guide plate of range hood, comprising a housing, a smoke guide plate rotatably arranged on the housing, and a reduction motor for driving the smoke guide plate to rotate, the reduction motor having a driving shaft, and a connecting rod coaxially fixedly connected with the driving shaft; A sliding groove extending along the length direction of the connecting rod is arranged on the connecting rod, and the sliding groove is arranged on the side away from the rotation center of the smoke guide plate; The smoke guide plate is provided with a hinge arm, and the hinge arm is provided with a guide shaft; The guide shaft extends and is slidingly arranged in the sliding groove, so that the reduction motor drives the hinge arm to rotate through the connecting rod, thereby driving the smoke guide plate to rotate.
[0009] Further, one end of the hinge arm is hingedly arranged with the casing, and the smoke guide plate is mounted on the hinge arm and rotates synchronously with the hinge arm.
[0010] Further, the sliding groove is a linear sliding groove or an arc-shaped sliding groove.
[0011] Further, the guide shaft is a pin shaft, a bolt or an integrally formed shaft column structure.
[0012] Further, a rolling element, a shaft sleeve or a wear-resistant bushing is arranged between the guide shaft and the sliding groove.
[0013] A driving method of a smoke guide plate of an oil smoke machine, comprising: a connecting rod is driven to rotate by a speed reduction motor; the relative sliding between the sliding groove on the connecting rod and the guide shaft on the hinge arm changes the force arm of the driving force of the speed reduction motor on the smoke guide plate with the rotation angle of the smoke guide plate; the equivalent force arm is increased in the initial stage of opening or closing of the smoke guide plate, so as to reduce the driving torque requirement of the speed reduction motor.
[0014] The beneficial effects of the present application are: 1. simple structure, low manufacturing cost and improved market competitiveness.
[0015] 2. the sliding cooperation between the sliding groove on the connecting rod and the guide shaft on the hinge arm changes the force arm of the driving force in the rotation process of the smoke guide plate, so as to match the torque requirement of the smoke guide plate at different opening and closing positions.
[0016] 3. in the initial stage of opening or closing of the smoke guide plate, the equivalent force arm is relatively large, so as to reduce the driving torque required to be provided by the speed reduction motor.
[0017] 4. under the premise of meeting the reliable driving of the smoke guide plate, a speed reduction motor with smaller power can be selected, so as to reduce the cost and reduce the energy consumption and noise.
[0018] 5. the driving mechanism is mainly composed of a connecting rod, a sliding groove and a guide shaft, and has simple structure, easy processing and assembly, and is suitable for popularization and application in the oil smoke machine. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a structure schematic view of the smoke guide plate in the closed state of the present application.
[0020] Figure 2 is a structure schematic view of the smoke guide plate in the open state of the present application.
[0021] Figure 3 is an effect drawing of the structure of the present application and the oil smoke machine.
[0022] Figure 4 is a structure schematic view of the smoke guide plate in the closed state of the present application. Figure 3Enlarged view of the structure of part A.
[0023] Figure 5 , 6 This is a schematic diagram of the structure of the present invention.
[0024] Figure 7 This is an exploded view of the structure of the present invention.
[0025] Figure 8 This is a diagram illustrating the assembly and use of the connecting rod and hinge arm in this invention.
[0026] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Smoke guide plate; 3. Gear motor; 4. Drive shaft; 5. Connecting rod; 6. Slide groove; 7. Hinge arm; 8. Guide shaft. Detailed Implementation
[0027] The invention will now be further described in detail with reference to the accompanying drawings. Figures 1 to 8 As shown, this embodiment provides a driving mechanism for an electric smoke guide plate of a range hood, including a housing 1, a smoke guide plate 2 rotatably mounted on the housing 1, and a reduction motor 3 for driving the smoke guide plate 2 to rotate.
[0028] The geared motor 3 has a drive shaft 4, a connecting rod 5 connected to the drive shaft 4, and a groove 6 extending along the length of the connecting rod 5. The smoke guide plate 2 is provided with a hinge arm 7 for driving its rotation, and a guide shaft 8 is provided on the hinge arm 7. The guide shaft 8 extends and is slidably disposed in the groove 6.
[0029] When the geared motor 3 is working, the drive shaft 4 drives the connecting rod 5 to rotate. The connecting rod 5 transmits the driving force to the hinge arm 7 through the sliding fit between the slide groove 6 and the guide shaft 8, thereby driving the smoke guide plate 2 to rotate relative to the housing 1, realizing the opening or closing of the smoke guide plate 2.
[0030] Since the guide shaft 8 can slide relative to the slide groove 6, the point of application of the driving force of the reduction motor 3 on the hinge arm 7 changes during the rotation of the smoke guide plate 2, so that the force arm of the driving force changes with the rotation angle of the smoke guide plate 2, which is different from the driving method in the prior art where the driving force arm is fixed.
[0031] In one embodiment: the guide shaft 8 is located at the first end of the slide groove 6 during the initial stage of the opening or closing of the smoke guide plate 2, and at the second end of the slide groove 6 during the final stage of the opening or closing of the smoke guide plate 2.
[0032] With the above settings, in the initial stage of opening or closing the smoke guide plate 2, the position of the guide shaft 8 relative to the hinge arm 7 makes the equivalent force arm of the reduction motor 3 on the hinge arm 7 larger, thereby reducing the required output drive torque of the reduction motor 3 in the stage when the smoke guide plate 2 needs to overcome a large resistance torque.
[0033] When the smoke guide plate 2 gradually rotates to the end of opening or closing, the equivalent force arm is correspondingly reduced, the driving process is more stable, and the overall driving reliability is improved.
[0034] In one of the embodiments: through the sliding fit between the chute 6 and the guide shaft 8, the required driving torque of the smoke guide plate 2 is not constant but changes with the rotation angle of the smoke guide plate 2 during the entire opening or closing process.
[0035] Compared with the existing technology that the reduction motor always needs to be selected according to the maximum load, the embodiment can effectively reduce the peak load demand of the reduction motor 3 in the driving process, thereby facilitating the miniaturization selection of the reduction motor, reducing the cost and energy consumption.
[0036] In one of the embodiments: the chute 6 can be a straight chute, so that the guide shaft 8 slides in a straight line; in other embodiments, the chute 6 can also be an arc chute with a predetermined curvature to meet different smoke guide plate motion trajectories or force arm change requirements.
[0037] By changing the shape of the chute 6, the motion path of the guide shaft 8 can be flexibly adjusted, thereby changing the change rule of the driving force arm, and good structural adaptability is achieved.
[0038] In one of the embodiments: the guide shaft 8 can be a pin shaft or a bolt structure and is arranged on the hinge arm 7 by a fastening method; in other embodiments, the guide shaft 8 can also be integrally formed with the hinge arm 7.
[0039] The above different structural forms can all realize the sliding guide function of the guide shaft 8 in the chute 6, and the manufacturing method is flexible, facilitating processing and assembly.
[0040] In one of the embodiments: a rolling element, a shaft sleeve or a wear-resistant bushing can be arranged between the guide shaft 8 and the chute 6 to reduce the friction and wear generated when the guide shaft 8 slides in the chute 6.
[0041] Through the above arrangement, the service life and operation reliability of the driving mechanism can be further improved, and it is suitable for use in the use scenario of frequently opening and closing the smoke guide plate.
[0042] In one of the embodiments: in this embodiment, one end of the hinge arm 7 is hingedly arranged with the casing 1, and the smoke guide plate 2 is installed on the hinge arm 7 and rotates synchronously with the hinge arm 7.
[0043] Through the above structural arrangement, the smoke guide plate 2 can stably rotate around the fixed rotation center, and the structure is simple, reliable in installation and convenient for integrated application in the existing range hood structure.
[0044] A driving method of a smoke guide plate of a range hood, comprising: The connecting rod is driven to rotate by a speed reduction motor; The relative sliding between the sliding groove on the connecting rod and the guide shaft on the hinged arm changes the force arm of the driving force of the speed reduction motor on the smoke deflector with the rotation angle of the smoke deflector; The equivalent force arm is increased at the initial stage of opening or closing of the smoke deflector to reduce the driving torque requirement of the speed reduction motor.
[0045] In summary, in the electric smoke deflector driving mechanism of the range hood, the speed reduction motor, the connecting rod, the sliding groove, the guide shaft and the hinged arm jointly constitute a power transmission and motion conversion system of the smoke deflector, and the working principle is as follows.
[0046] When the range hood is in a non-working state, the smoke deflector is in a closed position, and the smoke deflector forms a large static resistance torque on the driving mechanism under the action of its own gravity and structural resistance. At this time, the guide shaft is located at or close to the first end of the sliding groove.
[0047] When the range hood is started, the driving shaft of the speed reduction motor starts to rotate and drives the connecting rod connected thereto to rotate around the axis of the speed reduction motor. Since the sliding groove extending along the length direction is arranged on the connecting rod, the guide shaft on the hinged arm is limited by the guiding action of the sliding groove and cannot form a rigid fixed relationship with the connecting rod, but slides relatively along the sliding groove while the connecting rod rotates.
[0048] At the initial stage of opening or closing of the smoke deflector, the position of the guide shaft relative to the hinged arm makes the driving force of the speed reduction motor act on the hinged arm through the connecting rod and the guide shaft, and the acting point is relatively far away from the rotation center of the hinged arm, thereby forming a large equivalent force arm. By increasing the equivalent force arm, the speed reduction motor only needs to provide a small output torque to drive the smoke deflector to start rotating at the stage when the smoke deflector needs to overcome a large gravity torque and initial resistance torque.
[0049] With the continuous driving of the speed reduction motor, the connecting rod continues to rotate around the driving shaft, and the guide shaft gradually changes its position in the sliding groove, so that the acting point of the driving force moves along the sliding groove. During this process, the equivalent force arm of the driving force relative to the rotation center of the hinged arm gradually changes with the rotation angle of the smoke deflector.
[0050] When the smoke deflector rotates to the intermediate stage, the guide shaft is located in the middle region of the sliding groove, and the driving force arm is in a relatively moderate state, so that the driving mechanism realizes the matching between the driving force output and the load change while ensuring the smooth rotation of the smoke deflector.
[0051] When the smoke guide plate gradually approaches the fully open or fully closed position, the guide shaft moves to the second end of the sliding groove or a position close to the second end, at which time the equivalent force arm of the driving force relative to the rotation center of the hinge arm is relatively reduced. Since the gravity moment and resistance moment required to be overcome by the smoke guide plate at this stage are correspondingly reduced, the smaller equivalent force arm can still meet the driving requirements of the smoke guide plate, thereby avoiding excessive fast movement or impact at the end of driving, and making the movement of the smoke guide plate more stable.
[0052] As can be seen from the above driving process, the present application does not adopt a rigid fixed connection mode between the driving shaft and the hinge arm, but forms a force transmission structure with relative sliding freedom degree through the sliding groove and the guide shaft, so that the transmission path and action point of the driving force continuously change during the rotation of the smoke guide plate, thereby realizing dynamic adjustment of the driving force arm.
[0053] It is precisely due to the above driving mode with the change of the force arm with the rotation angle that the smoke guide plate can be started with a smaller driving torque at the initial stage of opening or closing, and the movement is kept relatively stable during the entire rotation process, thereby effectively reducing the load requirement of the speed reducer under the premise of ensuring reliable opening and closing of the smoke guide plate, improving the applicability and reliability of the driving mechanism, and thus can be widely used.
[0054] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships 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 indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application, and the terms "first", "second" are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated.
[0055] The basic principles and main features of the present application and the advantages of the present application have been shown and described. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application.
Claims
1. A driving mechanism of an electric smoke deflector of a range hood, comprising a housing, a smoke deflector rotatably arranged on the housing, and a reduction motor for driving the smoke deflector to rotate, characterized in that: the reduction motor has a driving shaft, and a connecting rod is connected to the driving shaft; a sliding groove extending along the length of the connecting rod is arranged on the connecting rod; the smoke deflector is provided with a hinge arm for driving the smoke deflector to rotate, and a guide shaft is arranged on the hinge arm; the guide shaft extends and is slidably arranged in the sliding groove, so that the rotation of the reduction motor is transmitted to the hinge arm through the sliding cooperation of the connecting rod and the guide shaft, so that the force arm of the reduction motor acting on the hinge arm changes with the rotation angle of the smoke deflector during the rotation of the smoke deflector.
2. The drive mechanism of the electric smoke deflector of a range hood according to claim 1, characterized in that: The guide shaft is located at the first end of the sliding groove in the initial stage of opening or closing the smoke deflector, and is located at the second end of the sliding groove in the final stage of opening or closing the smoke deflector, so that the equivalent force arm of the reduction motor acting on the hinge arm in the initial stage of opening or closing the smoke deflector is greater than that in the final stage.
3. The drive mechanism of the electric smoke deflector of a range hood according to claim 1 or 2, characterized in that: Through the sliding cooperation of the sliding groove and the guide shaft, the driving torque required by the smoke deflector during opening or closing changes nonlinearly, thereby reducing the peak output torque requirement of the reduction motor.
4. The drive mechanism of the electric smoke deflector of a range hood according to claim 1, characterized in that: The sliding groove is a linear sliding groove or an arc-shaped sliding groove arranged along a predetermined curvature.
5. The drive mechanism for the electric smoke deflector of a range hood according to claim 1, characterized in that: The guide shaft is a pin shaft, a bolt, or a shaft column structure integrally formed on the hinge arm.
6. The drive mechanism for the electric smoke deflector of a range hood according to claim 1, characterized in that: A rolling element, a shaft sleeve, or a wear-resistant bushing is arranged between the guide shaft and the sliding groove.
7. The drive mechanism for the electric smoke deflector of a range hood according to claim 1, characterized in that: One end of the hinge arm is hingedly arranged with the housing, and the smoke deflector is mounted on the hinge arm and rotates synchronously with the hinge arm.
8. A method for driving a smoke deflector of a range hood, applied to the driving mechanism of the electric smoke deflector of the range hood according to any one of claims 1 to 7, characterized in that, comprising: driving the connecting rod by the reduction motor; changing the force arm of the driving force of the reduction motor acting on the smoke deflector with the relative sliding between the sliding groove on the connecting rod and the guide shaft on the hinge arm; increasing the equivalent force arm in the initial stage of opening or closing the smoke deflector to reduce the driving torque requirement of the reduction motor.