Driving mechanism and range hood

Abstract

The utility model belongs to electric appliance technical field, specifically discloses a kind of driving mechanism and range hood. Driving mechanism includes mounting seat, drive motor, screw rod and nut seat. The inside of mounting seat has installation cavity and the opposite two side walls are all provided with the through hole that is communicated with installation cavity;Drive motor is installed in the first end of mounting seat;Screw rod is installed in installation cavity and first end is connected with motor shaft transmission of drive motor, and second end is rotatably installed in mounting seat;Nut seat includes nut sleeve part that is screwed on screw rod and connecting seat part that is surrounded in the outside of mounting seat, the opposite two sides of nut sleeve part are all connected with connecting arm part, and two connecting arm parts are respectively slidably threaded in through hole and connected with connecting seat part. Range hood includes smoke guide plate and above-mentioned driving mechanism, and driving mechanism drives smoke guide plate to move along left and right direction. The utility model can improve the use reliability of driving mechanism, reduce the damage of oil smoke to driving mechanism, improve the use safety and reliability of driving mechanism.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a drive mechanism and a range hood. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They use internal fans to extract kitchen fumes, thereby purifying the kitchen air and enhancing the cooking experience.

[0003] Since single-burner cooking is common, existing technology provides a top-mounted range hood to better meet users' exhaust needs for single-burner cooking. This hood includes a smoke collection hood, a fan box installed on top of the hood, and a fan inside the fan box. Air inlets are arranged side-by-side along the bottom of the smoke collection hood. A smoke guide plate is installed on the lower side of the hood corresponding to each air inlet. A drive mechanism, using a push rod motor, is installed inside the smoke collection hood, with the end of the push rod connected to the smoke guide plate. The extension and retraction of the push rod moves the smoke guide plate left and right.

[0004] However, when the aforementioned drive mechanism drives the smoke guide plate, the extension and retraction stroke of the push rod limits the left and right movement of the smoke guide plate. Simultaneously, during the extension and retraction process, grease easily adheres to the push rod, causing the grease on the push rod to enter the push rod motor when the push rod retracts. Over time, this affects the smoothness and reliability of the push rod's operation and can easily damage the internal structure of the push rod motor, reducing the performance of the drive mechanism. Furthermore, the extended push rod results in a relatively long overall length of the drive mechanism, making the push rod prone to deformation or even damage due to the large torque applied, thus affecting the safety of the drive mechanism. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a drive mechanism that can effectively solve the problems of low reliability and easy damage from oil fumes in existing drive mechanisms, which affect their long-term performance.

[0006] The second technical problem to be solved by this utility model is to provide a range hood that can effectively solve the problem of low reliability and easy damage to the smoke guide plate drive mechanism in existing range hoods, which leads to the long-term performance being affected by oil fumes.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A drive mechanism, comprising:

[0009] The mounting base extends along a first direction and has a mounting cavity inside. The mounting base has through holes on its opposite side walls in a second direction that communicate with the mounting cavity. The through holes extend along the first direction.

[0010] A drive motor is mounted on the first end of the mounting base;

[0011] A screw is installed in the mounting cavity, with its first end connected to the motor shaft of the drive motor and its second end rotatably mounted on the mounting base.

[0012] The nut seat includes a nut sleeve portion that is screwed onto the screw and a connecting seat portion surrounding the outside of the mounting base. Connecting arms are connected to opposite sides of the nut sleeve portion, and the two connecting arms are slidably inserted through the through hole and connected to the connecting seat portion.

[0013] Compared with the prior art, the driving mechanism described in this utility model has the following advantages: By using a drive motor, screw, and nut seat in a coordinated driving manner, the driving mechanism can ensure the stroke required to move the smoke guide plate, thus guaranteeing the reliability of the driving mechanism; simultaneously, by installing the screw inside the mounting base, both ends of the mounting base can be connected to the smoke hood during drive motor installation, thereby ensuring the stress stability and reliability of the entire driving mechanism and avoiding the probability of the drive motor bending or even being damaged; by installing the screw in the mounting cavity, and with the nut sleeve portion of the nut seat cooperating with the screw located within the mounting cavity, the screw and the structure cooperating with the nut seat can be... The shielding and protection reduces the impact of oil fumes on the screw and the structure that mates with the nut seat, ensuring the reliability of the screw and nut seat mating and improving the long-term performance of the drive mechanism. Furthermore, the connecting seat of the nut seat is positioned around the outside of the mounting base and connected to the nut sleeve via two opposing connecting arms, effectively enhancing the overall structural strength and stability of the nut seat, thereby improving its load-bearing capacity and the operational reliability of the drive mechanism. Moreover, the sliding connection seat through the through-hole guides the movement of the nut seat in the first direction, improving the reliability and smoothness of its movement in that direction and enhancing the overall performance of the drive mechanism.

[0014] In one embodiment, the nut sleeve is provided with inner guide ribs protruding from at least two opposite sides, and the inner guide ribs slide in engagement with the cavity wall of the mounting cavity;

[0015] And / or, the connecting seat portion is provided with an outer guide rib portion protruding from the side facing the mounting seat, and the outer guide rib portion slides in engagement with the outer side wall of the mounting seat.

[0016] In one embodiment, an inner guide rib is provided on each of the opposite sides of each through hole; and / or, an outer guide rib is provided on each of the opposite sides of each through hole.

[0017] In one embodiment, the cross-section of the nut sleeve is a rectangular cross-section or a rectangular cross-section with rounded corners, and the inner guide rib is provided protruding on each side of the nut sleeve;

[0018] And / or, the connecting seat is a U-shaped structure, with each side of the U-shaped structure connected to one of the two connecting arms, and each side of the connecting seat is provided with an outer guide rib.

[0019] In one embodiment, the mounting base includes a first base and a second base that are opposite to each other and spaced apart in a third direction. The first base and the second base both extend along the first direction. The two ends of the first base along the first direction are connected to the second base by a connecting structure. The first base and the second base surround and form the mounting cavity, and the gap between the first base and the second base forms the through hole. The third direction is perpendicular to both the first direction and the second direction.

[0020] In one embodiment, the connection structure includes an end seat, the ends of the first seat and the second seat along the first direction are detachably connected to the end seat, the drive motor is mounted on the end seat at the corresponding end, and the second end of the screw is rotatably mounted on the other end seat.

[0021] In one embodiment, the first seat body includes a first seat plate portion and two first side portions connected to the first seat plate portion. The two first side portions are opposite to and spaced apart in the second direction. The first seat plate portion extends outward from the outer side of the two first side portions in the second direction. Two through holes are formed between the two first side portions and the second seat body.

[0022] The connecting seat portion is arranged around the outside of the second seat body, and the orthographic projection of the nut seat and the second seat body on the first seat plate portion is located inside the first seat plate portion.

[0023] In one embodiment, a positioning protrusion is provided on the side of the connecting seat away from the mounting seat;

[0024] And / or, a fixing post is provided on the side of the connecting seat away from the mounting seat, and a fixing threaded hole is provided on the fixing post.

[0025] The second technical problem mentioned above is solved by the following technical solution:

[0026] A range hood includes a smoke collection hood with a smoke inlet and a smoke collection chamber, and also includes a smoke guide plate and a drive mechanism as described above. The drive mechanism is installed in the smoke collection chamber, and the mounting base is connected to the smoke collection hood. The first direction is the left-right direction. The nut seat is connected to the back side of the smoke guide plate through a drive connector, so that the drive mechanism drives the smoke guide plate to move in the left-right direction to change the air inlet position and actual air inlet area of ​​the smoke collection hood.

[0027] Compared with the prior art, the range hood described in this utility model has the following advantages: by adopting the above-mentioned range hood, the movement stroke of the drive mechanism driving the smoke guide plate can be guaranteed, and the driving stability and reliability of the drive mechanism on the smoke guide plate can be improved, thereby enhancing the operating performance of the range hood.

[0028] In one embodiment, the range hood further includes a guide assembly installed inside the smoke collection hood. The guide assembly includes a guide member extending in the left-right direction and a sliding member that slidably engages with the guide member. The sliding member is connected to the smoke guide plate through a guide connector so that the guide assembly guides the movement of the smoke guide plate. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a range hood provided in an embodiment of the present invention when the smoke guide plate is in the middle position;

[0030] Figure 2 A schematic diagram of the structure of the range hood provided in this embodiment of the present invention when the smoke guide plate is in the right extreme position;

[0031] Figure 3 A cross-sectional view of a range hood provided in an embodiment of this utility model;

[0032] Figure 4 This is a partial structural schematic diagram of a range hood provided in an embodiment of the present utility model;

[0033] Figure 5 for Figure 4 A magnified view of a section at point I;

[0034] Figure 6 A schematic diagram of the drive mechanism and drive connector provided in an embodiment of this utility model;

[0035] Figure 7 A schematic diagram showing the disassembled structure of the drive mechanism and drive connector provided in an embodiment of this utility model;

[0036] Figure 8 A cross-sectional view of the drive mechanism and drive connector provided in an embodiment of this utility model;

[0037] Figure 9This is a schematic diagram of the nut seat provided in an embodiment of the present utility model from one perspective.

[0038] Figure 10 A schematic diagram of the nut seat provided in an embodiment of this utility model from another perspective;

[0039] Figure 11 A schematic diagram of the end seat provided in an embodiment of this utility model;

[0040] Figure 12 A partial structural cross-sectional view of the drive mechanism provided in an embodiment of this utility model.

[0041] Label Explanation:

[0042] 1. Smoke hood; 11. Hood body; 111. Top panel; 112. Top air vent; 12. Filter screen; 121. Air inlet;

[0043] 2. Drive mechanism; 21. Mounting base; 211. First base body; 2111. First base plate portion; 2112. First side portion; 212. Second base body; 2121. Second base plate portion; 2122. Second side portion; 213. Mounting cavity; 214. Through hole; 215. End seat; 215a. First end seat; 215b. Second end seat; 2151. Outer seat portion; 2152. Positioning ring portion; 2153. Limiting rib portion; 2154. Fixing protrusion portion; 2155. Limiting groove; 22. Screw; 23. Nut seat; 231. Nut sleeve portion; 232. Connecting seat 233. Connecting arm; 234. Inner guide rib; 235. Outer guide rib; 236. Positioning protrusion; 237. Fixing column; 238. Support protrusion; 239. First reinforcing rib; 230. Second reinforcing rib; 2301. Third reinforcing rib; 24. Mounting bracket; 241. First mounting plate; 242. Inclined plate; 243. Second mounting plate; 244. Reinforcing plate; 25. Drive motor; 251. Motor housing; 2511. Protruding ring; 252. Worm; 253. Worm wheel; 26. Rotary bearing; 27. Limiting sleeve;

[0044] 3. Smoke guide plate; 31. Fixing base;

[0045] 4. Guide assembly; 41. Guide component; 42. Sliding component; 43. Guide connector; 431. Drum section; 432. Extension plate section;

[0046] 5. Drive connector; 51. First fixing part; 52. Extension part; 53. Second fixing part;

[0047] 6. Exhaust / exhaust module; 61. Air box; 62. Fan. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0049] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] This embodiment provides a range hood that can selectively open or close the left and right air inlets 121, and simplifies the structure of the internal drive mechanism 2. This improves the user experience of the range hood while reducing its cost and weight, and ensures smooth smoke extraction.

[0053] like Figures 1 to 3 , Figure 6 and Figure 9As shown, the range hood includes a smoke collection hood 1, an exhaust module 6, and a control module. The smoke collection hood 1 has a smoke collection chamber and an air inlet 121 communicating with the smoke collection chamber. The exhaust module 6 includes a blower box 61 and a fan 62 installed inside the blower box 61. The blower box 61 is installed on top of the smoke collection hood 1. The air inlet 1 of the fan 62 communicates with the smoke collection chamber, and the air outlet of the fan 62 is connected to an exhaust pipe. This allows the negative pressure generated by the operation of the fan 62 to act on the air inlet 121, thereby allowing the fumes to enter the smoke collection chamber through the air inlet 121 and be discharged into the external environment after passing through the inner cavity of the fan 62 and the exhaust pipe. The control module is communicatively connected to the fan 62 to control its operation.

[0054] In this embodiment, multiple air inlets 121 are spaced apart along the left-right direction. The smoke hood 1 includes a smoke guide plate 3 and a drive mechanism 2. The smoke guide plate 3 is installed on the front side of the smoke hood 1 and can block part of the air inlets 121. The drive mechanism 2 is installed inside the smoke hood 1 and is connected to the smoke guide plate 3. The drive mechanism 2 drives the smoke guide plate 3 to move along the left-right direction to adjust the air inlet position of the smoke hood 1. Specifically, the drive mechanism 2 can drive the smoke guide plate 3 to reciprocate between the leftmost extreme position blocking the leftmost air inlet 121 and the rightmost extreme position blocking the rightmost air inlet 121.

[0055] The drive mechanism 2 includes a mounting base 21, a drive motor 25, a screw 22, and a nut seat 23. The mounting base 21 extends along a first direction and has a mounting cavity 213 inside. Each of the opposite side walls of the mounting base 21 in a second direction has a through hole 214 communicating with the mounting cavity 213. The through holes 214 extend along the first direction, which is perpendicular to the second direction. The drive motor 25 is mounted on the first end of the mounting base 21. The screw 22 is mounted in the mounting cavity 213, with its first end connected to the motor shaft of the drive motor 25, and its second end rotatably mounted on the mounting base 21. The nut seat 23 includes a nut sleeve 231 screwed onto the screw 22 and a connecting seat 232 surrounding the outside of the mounting base 21. Connecting arms 233 are connected to opposite sides of the nut sleeve 231, and the two connecting arms 233 slide through the through holes 214 and connect to the connecting seat 232. The first direction is the left-right direction of the range hood, and the nut seat 23 is connected to the smoke guide plate 3 through the drive connector 5.

[0056] The drive mechanism 2 provided in this embodiment, through the coordinated drive of the drive motor 25, screw 22, and nut seat 23, ensures that the drive mechanism 2 can drive the smoke guide plate 3 to move within its stroke, thus guaranteeing the reliability of the drive mechanism 2. Simultaneously, by installing the screw 22 inside the mounting base 21, both ends of the mounting base 21 can be connected to the smoke collection hood 1 during the installation of the drive motor 25, thereby ensuring the stress stability and reliability of the entire drive mechanism 2 and avoiding the probability of the drive motor 25 bending or even being damaged. Furthermore, by installing the screw 22 inside the mounting cavity 213, and with the nut sleeve 231 of the nut seat 23 cooperating with the screw 22 located within the mounting cavity 213, the screw 22 and the structure cooperating with the nut seat 23 can be shielded and protected, reducing the risk of damage. The oil fumes act on the screw 22 and the structure that mates with the nut seat 23, ensuring the reliability of the mating between the nut seat 23 and the screw 22 and improving the long-term performance of the drive mechanism 2. Furthermore, the connecting seat 232 of the nut seat 23 surrounds the outside of the mounting base 21 and is connected to the nut sleeve 231 through two relatively arranged connecting arms 233, which can effectively improve the overall structural strength and stability of the nut seat 23, thereby improving the load-bearing capacity of the nut seat 23 and improving the operational reliability of the drive mechanism 2. Moreover, by sliding the connecting seat 232 through the through hole 214, the movement of the nut seat 23 in the first direction can also be guided, improving the reliability and smoothness of the movement of the nut seat 23 in the first direction and improving the performance of the drive mechanism 2.

[0057] The range hood provided in this embodiment, by adopting the aforementioned drive mechanism 2, helps to ensure the movement stroke of the smoke guide plate 3 in the left and right directions, while improving the operational reliability and smoothness of the smoke guide plate 3, and enhancing the user experience of the range hood.

[0058] It is worth noting that the driving mechanism 2 provided in this embodiment can also be applied to other scenarios where the moving structure needs to be reciprocated along the first direction. This embodiment takes the application of the driving mechanism 2 in a range hood to drive the smoke guide plate 3 to move as an example to illustrate the specific structure of the range hood. The application of the driving mechanism 2 in other scenarios can refer to the settings of this utility model. This utility model will not list them one by one.

[0059] like Figures 3 to 5As shown, in one embodiment, the range hood further includes a guide assembly 4 installed inside the smoke collection hood 1. The guide assembly 4 includes a guide member 41 extending in the left-right direction and a sliding member 42 slidably mounted on the guide member 41. The sliding member 42 is connected to the smoke guide plate 3 through a guide connector 43, so that the guide assembly 4 guides the left-right movement of the smoke guide plate 3. By setting the guide assembly 4, the movement of the smoke guide plate 3 can be guided; at the same time, the setting of the guide assembly 4 allows the lower part of the smoke guide plate 3 to be supported by the guide assembly 4, which can effectively improve the stability and reliability of the smoke guide plate 3 and avoid the problem that the entire weight of the smoke guide plate 3 is borne on the drive mechanism 2, resulting in a large load on the drive mechanism 2, which in turn leads to the problem that the drive connector 5 is easily deformed and damaged.

[0060] In one embodiment, the guide member 41 is a guide shaft, and the slider 42 is slidably sleeved on the guide shaft. The slider 42 and the guide shaft cooperate to form a linear bearing structure, thereby improving the smoothness of the slider 42 sliding along the guide shaft. In other embodiments, the guide member 41 further includes a guide rail structure, and the slider 42 is slidably disposed on the guide rail structure.

[0061] In another embodiment, a guide groove can be provided on the smoke hood 1, extending in the left-right direction, and the lower end of the smoke guide plate 3 can be slidably inserted into the guide groove. In another embodiment, the range hood may not have a guide component 4. In this case, when the area of ​​the smoke guide plate 3 is large, multiple drive connectors 5 can be spaced apart in the left-right direction, thereby increasing the connection points between the drive mechanism 2 and the smoke guide plate 3, ensuring the connection stability of the drive connectors 5 while reducing the force on a single drive connector 5; when the area of ​​the smoke guide plate 3 is small, the drive connectors 5 can be connected only in the middle of the smoke guide plate 3.

[0062] In one embodiment, the sliding member 42 has a cylindrical structure. To improve the convenience of connecting the guide connector 43 with the sliding member 42 and the smoke guide plate 3, the guide connector 43 includes a roller portion 431 and an extension plate portion 432 connected to the roller portion 431. The roller portion 431 is sleeved on the sliding member 42, and the extension plate portion 432 extends forward from the front side of the smoke collection hood 1 and connects to the smoke guide plate 3. Specifically, a fixing seat 31 is provided on the back side of the smoke guide plate 3, and the extension plate portion 432 is correspondingly provided with the fixing seat 31 and is detachably connected. It is worth noting that the extension plate portion 432 and the fixing seat 31 can be connected by detachable connection methods such as screw connection, snap-fit, plug-in connection, and magnetic connection.

[0063] In one embodiment, the smoke hood 1 has an air inlet 121 on its front side, and the smoke guide plate 3 extends obliquely from front to back, meaning the range hood has a side-suction function. The mounting base 21 of the drive mechanism 2 is installed on the top of the smoke hood 1, and the guide assembly 4 is installed at the lower end of the smoke hood 1 to improve the force balance and operational stability of the smoke guide plate 3.

[0064] In other embodiments, the range hood may also be a top-mounted range hood, a top-side dual-suction range hood, or other models suitable for installing the left-right movable smoke guide plate 4. This embodiment does not specifically limit the model of the range hood to which the drive mechanism 2 is applied, and the installation positions of the drive mechanism 2 and the guide component 4 can be specifically set according to the model of the range hood. This embodiment will not list them one by one.

[0065] The smoke hood 1 includes a hood body 11 and a filter screen 12. The hood body 11 has a smoke collection chamber, and an air box 61 is installed on the upper end of the hood body 11. The filter screen 12 is detachably installed on the front side of the hood body 11, and an air inlet 121 is provided on the filter screen 12. The filter screen 12 extends downward at an angle from front to back. The specific structure of the hood body 11 and the installation structure of the filter screen 12 on the hood body 11 can be set with reference to the prior art, which is not the focus of this utility model and will not be limited or described in detail here.

[0066] In one embodiment, the drive mechanism 2 is positioned at least partially above the front end of the filter screen 12, so that the drive mechanism 2 can be kept as far away as possible from the flue gas flow path inside the fume hood 1, thereby reducing the pollution of the drive mechanism 2 by oil fumes and improving the long-term performance of the drive mechanism 2. The top plate 111 of the hood body 11 has a top air vent 112 that communicates with the inner cavity of the air box 61. The top of the fume hood 1 has a top air vent 112 that communicates with the inner cavity of the air box 61. The mounting base 21 is arranged across the fixed air vent in the left-right direction, that is, the two ends of the mounting base 21 are located on the left and right sides of the top air vent 112, respectively.

[0067] like Figure 4 and Figure 6 As shown, the drive mechanism 2 includes a mounting bracket 24, with one mounting bracket 24 at each of the left and right ends of the mounting base 21. The mounting bracket 24 is connected to the top inner wall of the smoke hood 1, thereby enabling the drive mechanism 2 to be installed on the smoke hood 1. At the same time, the mounting bracket 24 is connected to the top of the smoke hood 1, which can improve the installation flexibility and reliability of the drive mechanism 2 in the smoke hood 1, and avoid the problem of excessive length required for the drive mechanism 2 due to installation on the side plate of the smoke hood 1, thus reducing the space occupied by the drive mechanism 2.

[0068] In one embodiment, the mounting bracket 24 includes a first mounting plate portion 241, an inclined plate portion 242, and a second mounting plate portion 243 connected in sequence. The inclined plate portion 242 extends downward at an angle in the left-right direction toward the other mounting bracket 24. The first mounting plate portion 241 is connected to the top of the smoke hood 1, and the second mounting plate portion 243 is connected to the mounting base 21. By providing the first mounting plate portion 241, the connection stability and reliability between the mounting bracket 24 and the top of the smoke hood 1 can be improved. By providing the inclined plate portion 242, the distance between the first mounting plate portions 241 of the two mounting brackets 24 can be increased while the distance between the two second mounting plate portions 243 can be decreased. This allows the two first mounting plate portions 241 to be located on the left and right sides of the top air vent 112, while the length of the mounting base 21 can be reduced, thereby reducing the overall size of the drive mechanism 2 and lowering its weight and cost. Furthermore, the second mounting plate portion 243 is connected to the upper side of the mounting base 21.

[0069] Furthermore, the tilt angle of the inclined plate portion 242 relative to the vertical direction is 30°~60° to improve the structural stability of the mounting bracket 24 and reduce the probability of local deformation. The left and right sides of the first mounting plate portion 243, the second mounting plate 243 and / or the inclined plate portion 242 are bent to form reinforcing plate portions 244 to enhance the overall structural strength of the mounting bracket 24, reduce the probability of damage to the mounting bracket 24 under stress, and improve the installation reliability of the drive mechanism 2 on the smoke hood 1.

[0070] To avoid interference between the drive connector 5 and the smoke hood 1, a clearance elongated hole is provided on the front side of the smoke hood 1. The clearance elongated hole is located above the filter screen 12, and the drive connector 5 can be movably inserted into the clearance elongated hole. The drive connector 5 includes a first fixing part 51, an extension part 52, and a second fixing part 53 connected in sequence. The first fixing part 51 is connected to the connecting seat part 232 of the nut seat 23, and the second fixing part 53 is connected to the smoke guide plate 3. The extension part 52 is movably inserted into the front side of the smoke hood 1. The extension part 52 extends forward at an angle from top to bottom, so that the drive connector 5 applies an upward pulling force to the smoke guide plate 3, thereby overcoming the gravity of the smoke guide plate 3 and ensuring the stability of the smoke guide plate 3. The angle between the extension direction of the extension part 52 and the smoke guide plate 3 is preferably between 80° and 100°.

[0071] In one embodiment, the first fixing part 51 is detachably connected to the smoke guide plate 3 to facilitate the assembly and disassembly of the smoke guide plate 3, thereby improving the ease of cleaning the range hood. The first fixing part 51 and the smoke guide plate 3 can be connected by detachable connection methods such as plug-in, snap-fit, magnetic connection or screw connection.

[0072] In one embodiment, the second direction is the front-to-back direction of the range hood, that is, through holes 214 are provided on both the front and back sides of the mounting base 21, which helps to improve the stress stability of the nut seat 23 during movement. In other embodiments, the second direction can also be the up-down direction of the range hood, that is, through holes 214 are provided on both the upper and lower sides of the mounting base 21.

[0073] To improve the ease of processing the mounting base 21, the mounting base 21 includes a first base body 211 and a second base body 212 arranged opposite to each other and spaced apart in a third direction. The first base body 211 and the second base body 212 enclose a mounting cavity 213, and the gap between the first base body 211 and the second base body 212 forms a through hole 214. The two ends of the first base body 211 are connected to the second base body 212 via a connecting structure. This arrangement allows the first base body 211 and the second base body 212 to be manufactured separately, reducing the difficulty of manufacturing the mounting base 21 and thus reducing processing costs. In other embodiments, the mounting base 21 can also be integrally formed. The third direction refers to the height direction of the range hood.

[0074] Specifically, the first seat body 211 includes a first seat plate portion 2111 and two first side portions 2112 connected to the lower side of the first seat plate portion 2111. The two first side portions 2112 are arranged opposite to each other and spaced apart in the front-rear direction, and two through holes 214 are formed between the two first side portions 2112 and the second seat body 212. Specifically, the second seat body 212 includes a second seat plate portion 2121 and two second side portions 2122 connected to the front and rear sides of the second seat plate portion 2121. The two first side portions 2112 and the two second side portions 2122 are arranged opposite to each other and spaced apart, so that through holes 214 are formed between the second side portions 2122 and the corresponding first side portions 2112.

[0075] Furthermore, the width of the first base plate portion 2111 in the front-rear direction is greater than the width between the two first side portions 2112, and the first base plate portion 2111 is connected to the mounting bracket 24. That is, the first base plate portion 2111 extends outward from the outer side of the two first side portions 2112 in the second direction. This increases the width of the first base plate portion 2111 while ensuring the appropriate size of the mounting cavity 213, thereby increasing the mating area between the mounting base 21 and the mounting bracket 24, improving the connection stability between the mounting base 21 and the mounting bracket 24, and thus better ensuring the operational stability and reliability of the drive mechanism 2. Furthermore, the orthographic projection of the nut seat 23 on the first base plate portion 2111 is located inside the first base plate portion 2111, to prevent oil from dripping from the top of the smoke hood 1 onto the nut seat 23.

[0076] like Figure 8 and Figure 9As shown, to further improve the mobility reliability of the nut seat 23, the nut sleeve 231 and the cavity wall of the mounting cavity 213 are spaced apart. At least two opposite outer walls of the nut sleeve 231 are provided with protruding inner guide ribs 234, which slide in contact with the cavity wall of the mounting cavity 213. By providing the inner guide ribs 234 in sliding contact with the cavity wall of the mounting cavity 213, the movement of the nut seat 23 in the left-right direction is guided. Simultaneously, the contact area between the nut seat 23 and the mounting base 21 is reduced, decreasing the magnitude of sliding friction and thus improving the smoothness of sliding of the nut seat 23. Furthermore, the inner guide ribs 234 also help to reduce the weight of the nut seat 23 while increasing its overall structural strength and rigidity. Additionally, the presence of inner guide ribs 234 on at least two opposite sides of the nut sleeve 231 improves the stability of the force applied to the nut seat 23 during sliding, reducing the probability of the nut seat 23 becoming stuck.

[0077] The cross-section of the nut sleeve 231 is preferably a rectangular cross-section or a rectangular cross-section with rounded corners. Inner guide ribs 234 are provided on all four sides of the nut sleeve 231 to ensure smooth sliding of the nut seat 23. Specifically, two inner guide ribs 234 are provided at intervals on the left and right sides of the nut sleeve 231, and one inner guide rib 234 is provided on each of the upper and lower sides of the nut sleeve 231.

[0078] In one embodiment, the inner wall of the connecting seat 232 is provided with an outer guide rib 235, which slides in engagement with the outer wall of the mounting seat 21. Thus, the outer guide rib 235 guides the sliding of the nut seat 23 relative to the mounting seat 21 while avoiding the problem of a large contact area and thus high friction caused by direct contact between the connecting seat 232 and the mounting seat 21, thereby improving the smoothness and reliability of the sliding of the nut seat 23.

[0079] Furthermore, multiple outer guide ribs 235 are provided at intervals along the circumference of the mounting base 21 to improve the stability and reliability of the sliding fit between the nut seat 23 and the mounting base 21.

[0080] Furthermore, the connecting seat 232 has a U-shaped structure, with its two sides connected to two connecting arms 233 respectively. The two opposite sides of the U-shaped structure are located on opposite sides of the second seat body 212, and the bottom of the U-shaped structure is opposite to the second seat plate 2121 of the second seat body 212. By setting the connecting seat 232 to a U-shaped structure, it is easier to have the connecting seat 232 surround the outside of the mounting base 21, and the connection convenience and stability between the connecting seat 232 and the nut sleeve 231 are improved. Specifically, the bottom and inner walls of both sides of the connecting seat 232 are provided with protruding outer guide ribs 235.

[0081] In one embodiment, each through hole 214 is provided with an outer guide rib 235 on both opposite sides, and / or each through hole 214 is provided with an inner guide rib 234 on both the upper and lower sides, to enhance the local structural strength of the nut seat 23 at the connection position of the connecting arm 233, reduce the problem of deformation or even breakage caused by local stress concentration, and effectively improve the reliability of the nut seat 23. Furthermore, the inner guide ribs 234 and outer guide ribs 235 on both sides of the through hole 214 are provided in a one-to-one correspondence to further improve guiding stability and reliability.

[0082] like Figure 8 and Figure 10 As shown, to improve the ease of connection between the nut seat 23 and the drive connector 5, one of the nut seat 23 and the drive connector 5 is provided with a positioning protrusion 236, and the other is provided with a positioning hole. The positioning hole and the positioning protrusion 236 are provided in a one-to-one correspondence. The positioning protrusion 236 is inserted into the positioning hole to realize the installation and positioning of the drive connector 5 and the nut seat 23. In one embodiment, the lower side of the nut seat 23 is provided with a downward protruding positioning protrusion 236, and the drive connector 5 is provided with a positioning hole.

[0083] The nut seat 23 and the drive connector 5 are connected by fastening threaded parts passing through them to improve the connection stability and reliability of the nut seat 23 and the drive connector 5. At least two fastening threaded parts are provided at intervals to reduce the stress at a single connection position and improve structural stability.

[0084] To improve connection convenience, in one embodiment, a fixing post 237 is provided on the lower side of the connecting seat 232, and a fastening threaded hole is provided on the fixing post 237. The first fixing part 51 has a plate-like structure and a fastening through hole is provided on the first fixing part 51. At least two fixing posts 237 are provided at intervals. The fastening through holes and fastening threaded holes are connected in a one-to-one correspondence. The fastening threaded part passes through the fastening through hole and is screwed into the fastening threaded hole.

[0085] In one embodiment, two positioning protrusions 236 are arranged opposite to each other and spaced apart, with a first reinforcing rib 239 connecting the two positioning protrusions 236. Two fixing posts 237 are also arranged opposite to each other and spaced apart, with a second reinforcing rib 230 connecting the two fixing posts 237. The first reinforcing rib 239 and the second reinforcing rib 230 are arranged intersectingly. This improves the layout rationality of the fixing posts 237 and the positioning protrusions 236, ensuring the structural dimensions of the fixing posts 237 and the positioning protrusions 236 while avoiding interference between structures. Preferably, the first reinforcing rib 239 and the second reinforcing rib 230 are arranged vertically.

[0086] The bottom of the connecting seat 232 is provided with a support protrusion 238, which abuts against the first fixing part 51 to increase the contact area between the nut seat 23 and the drive connector 5, improve the connection stability between the nut seat 23 and the drive connector 5, and at the same time increase the overall structural strength and rigidity of the nut seat 23, reduce the probability of the nut seat 23 being damaged by force, and improve the performance of the nut seat 23.

[0087] Multiple support protrusions 238 are spaced apart to enhance structural reinforcement. In one embodiment, one support protrusion 238 is provided at each of the four corners of the second base plate 2121. A fixing post 237 or a positioning protrusion 236 is provided between each pair of adjacent support protrusions 238, i.e., the support protrusions 238 are arranged in a rectangle, and the fixing post 237 or positioning protrusion 236 is located at the center of the four sides of the rectangle, which helps to improve the regularity and rationality of the structural layout on the nut seat 23. Each support protrusion 238 is connected to the adjacent fixing post 237 and connecting protrusion with a third reinforcing rib 2301 to further enhance the overall structural strength of the nut seat 23 and improve its performance.

[0088] like Figure 5 , Figure 6 , Figure 10 and Figure 11 As shown, in one embodiment, the connecting structure includes end seats 215, with one end seat 215 at each of the left and right ends of the first seat 211. The left and right ends of the first seat 211 and the left and right ends of the second seat 212 are respectively connected to the corresponding end seats 215. The first end of the screw 22 passes through the end seat 215 and is connected to the drive motor 25, while the second end of the screw 22 is rotatably mounted on the other end seat 215. By providing end seats 215, the connection convenience between the second seat 212 and the first seat 211 can be improved, and the machining of the end seats 215 can improve the installation convenience of the screw 22 on the mounting base 21, reducing the machining cost of the mounting base 21. In other embodiments, the left and right ends of the first seat 211 and the second seat 212 can extend the connecting structure in a direction toward each other, and the connecting structure of the two can be detachably connected to realize the assembly of the mounting base 21.

[0089] For ease of subsequent description, the end seat 215 near the drive motor 25 will be referred to as the first end seat 215a, and the other end seat 215 will be referred to as the second end seat 215b.

[0090] To improve the ease of assembly of the end seat 215, the first seat 211, and the second seat 212, a limiting groove 2155 is provided on the side of the end seat 215 facing the first seat 211. The first seat 211 and the second seat 212 are at least partially inserted into the limiting groove 2155 to achieve assembly positioning. The first seat 211 and the end seat 215 are fastened together by an upper fastener, and the second seat 212 is fastened together with the end seat 215 by a lower fastener.

[0091] Specifically, the end seat 215 includes an outer seat portion 2151. The outer seat portion 2151 protrudes towards the side of the first seat body 211 and is provided with a positioning ring portion 2152 and a limiting rib portion 2153. The limiting rib portion 2153 is U-shaped with an upward opening and is spaced apart outside the positioning ring portion 2152. A limiting groove 2155 is formed between the limiting rib portion 2153 and the positioning ring portion 2152. The end of the second seat body 212 and the two first side portions 2112 of the first seat body 211 are inserted into the limiting groove 2155 and abut against the limiting rib portion 2153. This causes the front and rear sides of the first seat body 211 and the second seat body 212 to be sandwiched between the front and rear sides of the limiting rib portion 2153, and the second seat plate portion 2121 of the second seat body 212 cooperates with the U-shaped bottom of the limiting rib portion 2153 for limiting.

[0092] To further improve assembly reliability, the upper side of the positioning ring 2152 abuts against the upper inner wall of the first seat 211, and the bottom inner wall of the second seat 212 abuts against the lower side of the positioning ring 2152. This restricts the assembly position of the first seat 211, the second seat 212, and the end seat 215 in the vertical direction. Furthermore, a limiting plane is provided on the lower side of the positioning ring 2152, which fits against the second seat plate 2121 of the second seat 212 to increase the contact area between the positioning ring 2152 and the second seat 212, thereby improving the limiting effect.

[0093] In one embodiment, a positioning arc groove is provided on the lower side of the first base plate portion 2111. The bottom of the positioning arc groove is in contact with the outer side wall of the positioning ring portion 2152, thereby increasing the contact area between the first base plate portion 211 and the positioning ring portion 2152, and thus improving the positioning and limiting effect. In other embodiments, the upper side of the positioning ring portion 2152 may be cut into a plane that is in contact with the lower side wall of the first base plate portion 2111. In this configuration, the lower side of the first base plate portion 2111 can be a plane.

[0094] The first end seat 215a has a through mounting hole extending in the left-right direction. The first end of the screw 22 passes through the mounting hole and connects to the drive motor 25. To improve the ease of connection between the first end seat 215a and the drive motor 25, a positioning groove is provided on the side of the first end seat 215a away from the first base body 211. The motor housing 251 of the drive motor 25 has a protruding ring portion 2511, which is inserted into the positioning groove. To improve the assembly positioning effect, the protruding ring portion 2511 is arranged in a ring and is spaced around the outer side of the output end of the drive motor 25. The positioning groove is arranged in a ring and is located outside the mounting hole.

[0095] To improve the ease of installation of the drive motor 25, the drive motor 25 includes a motor body, a worm gear 252 coaxially connected to the output shaft of the motor body, and a worm wheel 253 meshing with the worm gear 252. The worm wheel 253 is coaxially connected to the screw 22. This arrangement eliminates the need for the drive motor 25 to be arranged in the left-right direction, thereby improving the ease of installation of the drive motor 25 and reducing the length of the drive mechanism 2 in the left-right direction, thus improving the ease of installation of the drive mechanism 2. The worm gear 252 preferably extends in the front-back direction, thereby reducing the space occupied by the drive mechanism 2 in the height direction. Furthermore, at least two opposite sides of the first end seat 215a are provided with fixing protrusions 2154, which are detachably connected to the motor housing 251.

[0096] To improve the smoothness of screw 22 rotation, both ends of screw 22 have smooth shaft sections, and rotating bearings 26 are sleeved on the smooth shaft sections. The rotating bearings 26 are installed on end seats 215. Specifically, a bearing groove is opened on the second end seat 215b, and the rotating bearing 26 is installed in the bearing groove. The corresponding smooth shaft section of screw 22 is inserted into the inner ring of rotating bearing 26. The mounting hole of the first end seat 215a has a bearing mounting groove on its wall. The corresponding rotating bearing 26 is set in the bearing mounting groove. The bearing mounting groove has a groove bottom facing away from the second end seat 215b. One end of rotating bearing 26 abuts against the groove bottom of bearing mounting groove. A limiting sleeve 27 is clamped between the other end of rotating bearing 26 and worm gear 253 to restrict rotating bearing 26 from sliding in a direction away from mounting cavity 213, ensuring the stability of rotating bearing 26.

[0097] In one embodiment, the limiting sleeve 27 is made of an elastic material, thereby compensating for the deviation between the actual clearance and the design clearance between the rotating bearing 26 and the worm gear 253 caused by machining or assembly errors through the deformation of the limiting sleeve 27, thereby improving the reliability of the drive mechanism 2.

[0098] Other structural features of the range hood can be designed with reference to existing technologies, and will not be described in detail in this embodiment.

[0099] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0100] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A driving mechanism, characterized in that, include: Mounting base (21) extends along a first direction and has a mounting cavity (213) inside. The mounting base (21) has through holes (214) communicating with the mounting cavity (213) on both opposite side walls in a second direction. The through holes (214) extend along the first direction and the first direction is perpendicular to the second direction. A drive motor (25) is mounted on the first end of the mounting base (21); The screw (22) is installed in the mounting cavity (213) and its first end is connected to the motor shaft of the drive motor (25) for transmission, and its second end is rotatably installed on the mounting base (21). The nut seat (23) includes a nut sleeve (231) screwed onto the screw (22) and a connecting seat (232) surrounding the outside of the mounting base (21). The nut sleeve (231) is connected to connecting arms (233) on both sides. The two connecting arms (233) slide through the through hole (214) and are connected to the connecting seat (232).

2. The driving mechanism according to claim 1, characterized in that, The nut sleeve (231) has an inner guide rib (234) protruding from at least two opposite sides, and the inner guide rib (234) slides in cooperation with the cavity wall of the mounting cavity (213). And / or, the connecting seat (232) is provided with an outer guide rib (235) protruding from the side facing the mounting seat (21), and the outer guide rib (235) slides in cooperation with the outer side wall of the mounting seat (21).

3. The driving mechanism according to claim 2, characterized in that, Each of the through holes (214) is provided with an inner guide rib (234) on both sides; and / or, each of the through holes (214) is provided with an outer guide rib (235) on both sides.

4. The driving mechanism according to claim 3, characterized in that, The cross-section of the nut sleeve (231) is a rectangular cross-section or a rectangular cross-section with rounded corners, and the inner guide rib (234) is protruding on each side of the nut sleeve (231). And / or, the connecting seat (232) is a U-shaped structure, and the two sides of the U-shaped structure are respectively connected to the two connecting arms (233), and the outer guide rib (235) is protruding from each side of the connecting seat (232).

5. The driving mechanism according to claim 1, characterized in that, The mounting base (21) includes a first base (211) and a second base (212) that are opposite to each other and spaced apart in a third direction. The first base (211) and the second base (212) both extend along the first direction. The two ends of the first base (211) along the first direction are connected to the second base (212) by a connecting structure. The first base (211) and the second base (212) surround and form the mounting cavity (213). The gap between the first base (211) and the second base (212) forms the through hole (214). The third direction is perpendicular to both the first direction and the second direction.

6. The driving mechanism according to claim 5, characterized in that, The connection structure includes an end seat (215), the ends of the first seat (211) and the second seat (212) along the first direction are detachably connected to the end seat (215), the drive motor (25) is mounted on the end seat (215) at the corresponding end, and the second end of the screw (22) is rotatably mounted on the other end seat (215).

7. The driving mechanism according to claim 5, characterized in that, The first seat (211) includes a first seat plate portion (2111) and two first side portions (2112) connected to the first seat plate portion (2111). The two first side portions (2112) are opposite to each other and spaced apart in the second direction. The first seat plate portion (2111) extends outward from the outer side of the two first side portions (2112) in the second direction. Two through holes (214) are formed between the two first side portions (2112) and the second seat (212). The connecting seat (232) surrounds the outside of the second seat body (212), and the orthographic projection of the nut seat (23) and the second seat body (212) on the first seat plate (2111) is located inside the first seat plate (2111).

8. The driving mechanism according to any one of claims 1-7, characterized in that, The connecting seat (232) has a positioning protrusion (236) protruding from the side away from the mounting seat (21). And / or, a fixing post (237) is provided on the side of the connecting seat (232) away from the mounting seat (21), and a fixing thread hole is provided on the fixing post (237).

9. A range hood, comprising a smoke hood (1) having an air inlet (121) and a smoke collection chamber, characterized in that, It also includes a smoke guide plate (3) and a drive mechanism as described in any one of claims 1-8, wherein the drive mechanism is installed in the smoke collection chamber and the mounting base (21) is connected to the smoke collection hood (1), the first direction is the left-right direction, and the nut seat (23) is connected to the back side of the smoke guide plate (3) through the drive connector (5) so that the drive mechanism drives the smoke guide plate (3) to move along the left-right direction to change the air inlet position and actual air inlet area of ​​the smoke collection hood (1).

10. The range hood according to claim 9, characterized in that, The range hood also includes a guide assembly (4) installed inside the smoke collection hood (1). The guide assembly (4) includes a guide member (41) extending in the left-right direction and a sliding member (42) slidingly engaged with the guide member (41). The sliding member (42) is connected to the smoke guide plate (3) through a guide connector (43) so that the guide assembly (4) guides the movement of the smoke guide plate (3).

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