Impeller mounting structure and range hood

Abstract

The utility model discloses an impeller mounting structure, which comprises a volute (1), an impeller (2) and a locking assembly (3), and is characterized in that the locking assembly (3) comprises a fixed seat (31) which is a magnetic conductive piece, and the impeller (2) is sleeved on the periphery of the fixed seat (31) through a bearing (21); the lower part of the limiting cylinder (32) is accommodated in the mounting hole (311) of the fixed seat (31), the periphery of the limiting cylinder (32) is provided with a limiting flange (321) for limiting an inner ring of the bearing (21), and a first magnet (322), a second magnet (323) positioned above the first magnet (322) and two magnetic conductive blocks (324) which are respectively arranged close to an N pole and an S pole of the first magnet (322) are arranged in the limiting cylinder (32); and the rotating rod (33) is used for driving the second magnet (323) to rotate relative to the first magnet (322). The utility model further discloses a range hood applying the impeller mounting structure.

Description

Technical Field

[0001] This utility model relates to the field of kitchen equipment technology, specifically to an impeller mounting structure and a range hood. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a centrifugal fan inside to draw in cooking fumes and a filter to remove some grease particles. The centrifugal fan consists of a casing, an impeller housed within the casing, and a motor that drives the impeller. When the impeller rotates, a negative pressure is generated at the center of the fan, drawing in the cooking fumes from below. After being accelerated by the fan, the fumes are collected by the casing and guided outwards.

[0003] However, with prolonged use, the impeller of the internal fan of a range hood will become covered with grease, causing problems such as reduced smoke extraction efficiency and increased noise. Therefore, it is necessary to disassemble and clean the impeller regularly. This will improve the efficiency of smoke extraction, extend the life of the range hood, and save on electricity bills.

[0004] Currently, most range hoods use nuts to secure the impeller, as detailed in Chinese patent application number 202220245829.8, "Centrifugal Fan." Therefore, disassembling the impeller typically requires first securing it, then unscrewing the nut. However, because the impeller blades are thin, they are easily deformed during assembly and disassembly, affecting the fan's performance. Furthermore, controlling the force applied when installing or removing the nut is difficult. If the nut is too loose, it may fall off during use, posing a significant safety risk; if it's too tight, it will be much more difficult to disassemble next time. This significantly increases the difficulty of impeller assembly and disassembly. Utility Model Content

[0005] The first technical problem this invention aims to solve is to provide an impeller installation structure that avoids blade deformation and is simple and quick to install and remove, in light of the current state of the technology.

[0006] The second technical problem to be solved by this utility model is to provide a range hood with the above-mentioned impeller mounting structure.

[0007] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: an impeller mounting structure, including a volute, an impeller, and a locking assembly, wherein the impeller is mounted in the volute via the locking assembly, characterized in that: the locking assembly includes...

[0008] The fixed base is a magnetic conductive component, fixed relative to the volute, and has a mounting hole. The impeller is sleeved on the outer periphery of the fixed base through a bearing.

[0009] A limiting cylinder extends axially along the mounting hole, its lower part is accommodated in the mounting hole, and its periphery has a limiting flange for limiting the inner ring of the bearing. The limiting cylinder contains a first magnet, a second magnet located above the first magnet, and two magnetically conductive blocks arranged close to the N and S poles of the first magnet, respectively.

[0010] A rotating rod, installed inside the limiting cylinder, is used to drive the second magnet to rotate relative to the first magnet;

[0011] In the locked state, the magnetic poles of the first magnet and the second magnet face the same direction and attract the fixed seat, and the inner ring of the bearing is located between the limiting flange and the volute.

[0012] In the unlocked state, the magnetic poles of the first and second magnets are facing opposite directions, thus releasing their attraction to the fixed seat, and the limiting flange releases its restriction on the inner ring of the bearing.

[0013] To facilitate the rotation of the rotating rod, the locking assembly also includes...

[0014] The pressing rod is installed inside the limiting cylinder and is connected to the rotating rod via a transmission mechanism; and

[0015] An elastic element acts between the limiting cylinder and the pressing rod to ensure that the pressing rod always tends to extend outward.

[0016] In order to enable the pressing rod to rotate and drive the rotating rod to rotate after being pressed and released, two sets of centrally symmetrical guide grooves are provided on the outer peripheral wall of the pressing rod. Each set of guide grooves includes a vertical section extending along the axial direction of the pressing rod and an inclined section extending downward in a spiral shape from the top of the vertical section. The bottom end of the inclined section of the first guide groove is connected to the bottom end of the vertical section of the second guide groove.

[0017] The peripheral part of the limiting cylinder is provided with a limiting buckle, the head of which can be slidably inserted into the guide groove;

[0018] The top end of the rotating rod is connected to the pressing rod via a telescopic transmission mechanism, so that the rotating rod can rotate under the drive of the pressing rod but does not move up and down with the pressing rod.

[0019] To ensure that the locking component switches sequentially between locked and unlocked states, the limiting buckle is a spring buckle, the depth of the inclined section gradually decreases from the top to the bottom, the depth of the vertical section is the same as the depth of the bottom of the inclined section, and less than the depth of the top of the inclined section.

[0020] To facilitate the installation of the limit buckle, a groove is provided on the peripheral wall of the limit cylinder, and the limit buckle includes a plug that seals the port at the outward end of the groove.

[0021] A movable pin is installed at the port of the inward-facing end of the slot; and

[0022] A compression spring is housed in the groove, with its two ends abutting against the plug and the movable pin, respectively, so that the head of the movable pin always tends to protrude from the inner circumferential wall of the limiting cylinder and be inserted into the guide groove.

[0023] To prevent the movable pin from disengaging from the slot, the outer peripheral wall of the movable pin has an outer step, and the inner peripheral wall of the slot has an inner step, which limits the extreme position of the movement of the outer step of the movable pin toward the pressing rod side.

[0024] To improve stability, two limit buckles are provided and are arranged at intervals along the periphery of the limit cylinder.

[0025] To simplify the telescopic mechanism, the cross-section of the rotating rod is not circular, and the bottom end of the pressing rod has a slot for the rotating rod to be inserted. The inner peripheral wall contour of the slot is slidably fitted with the outer peripheral wall contour of the rotating rod. The outer peripheral wall of the rotating rod and the inner peripheral wall of the slot constitute the telescopic transmission mechanism.

[0026] To facilitate the installation of the elastic element, the elastic element is a compression spring, which is sleeved on the outer periphery of the rotating rod, with its two ends abutting against the top surface of the magnetic block and the bottom surface of the pressing rod, respectively.

[0027] To facilitate the relative fixation of the first magnet and the magnetic blocks within the limiting cylinder, the bottom end of the limiting cylinder is closed, and the bottom of the inner cavity of the limiting cylinder has a first slot, in which the first magnet and the two magnetic blocks are secured.

[0028] To facilitate the relative fixation of the second magnet on the rotating rod, a second slot is provided at the bottom end of the rotating rod, and the second magnet is secured in the second slot.

[0029] To ensure that the magnets are magnetic in the locked state and non-magnetic in the unlocked state, in the locked state, the magnetic lines of force of the first and second magnets are at least partially exposed outside the limiting cylinder; in the unlocked state, the magnetic lines of force of the first and second magnets are located inside the magnetically conductive block.

[0030] To reduce the difficulty of processing, the limiting cylinder is arranged coaxially with the bearing.

[0031] To ensure that the motor is not contaminated by oil during use, the range hood also includes a motor, which is installed on the outside of the volute, and its output shaft is connected to the impeller via a transmission component.

[0032] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: a range hood with the above-mentioned impeller mounting structure.

[0033] Compared with the prior art, the advantages of this utility model are as follows: the locking assembly is composed of a fixed seat, a limiting cylinder and a rotating rod, and the impeller is installed in the volute through the locking assembly. The rotating rod can drive the second magnet to rotate relative to the first magnet to attract or release the fixed seat to achieve locking or unlocking. In this way, the user does not need to fix the impeller when installing or removing it, which effectively avoids the deformation of the blades in the impeller. Moreover, no tools are needed, and the installation and removal are simple and quick, making it convenient for users to clean the range hood themselves. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the impeller mounting structure in the locked state in an embodiment of the range hood of this utility model;

[0035] Figure 2 for Figure 1 A longitudinal sectional view;

[0036] Figure 3 for Figure 2 Enlarged view of Part I;

[0037] Figure 4 for Figure 3 3D exploded view of the locking component;

[0038] Figure 5 for Figure 4 A three-dimensional structural diagram of the middle limiting cylinder;

[0039] Figure 6 for Figure 4 A three-dimensional structural diagram of the central pressing rod;

[0040] Figure 7 for Figure 3 A longitudinal sectional view of the locking component;

[0041] Figure 8 for Figure 7 A schematic diagram of the magnetic field lines of the first and second magnets in the diagram;

[0042] Figure 9 for Figure 8 A schematic diagram of the magnetic field lines of the first and second magnets after the locking component is switched to the unlocked state. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0044] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0045] like Figures 1 to 9 The image shows a preferred embodiment of the range hood with an impeller mounting structure according to this utility model. The impeller mounting structure includes a volute 1, an impeller 2, a locking assembly 3, and a motor 4.

[0046] The impeller 2 is installed inside the volute 1 via a locking assembly 3.

[0047] The locking assembly 3 includes a fixed base 31, a limiting cylinder 32, a rotating rod 33, a pressing rod 34, and an elastic element 35.

[0048] Specifically, the bottom of the fixing base 31 has a fixing part 310 for fixing to the volute 1; the interior of the fixing base 31 has a mounting hole 311 extending axially along the impeller 2, and the bottom end of the mounting hole 311 is closed. The impeller 2 is sleeved on the outer periphery of the fixing base 31 via a bearing 21. In this embodiment, the fixing base 31 is a magnetic conductive component, made of a highly magnetically permeable material, preferably an alloy material with a high iron content.

[0049] The limiting cylinder 32 is made of a non-magnetic metal material, extends axially along the mounting hole 311, and is coaxially arranged with the bearing 21. The lower part of the limiting cylinder 32 is accommodated in the mounting hole 311. The bottom end of the limiting cylinder 32 is closed, and the bottom of the inner cavity of the limiting cylinder 32 has a first groove 320. A limiting flange 321 for limiting the inner ring of the bearing 21 is protruding on the outer peripheral wall of the middle part of the limiting cylinder 32. The limiting cylinder 32 contains a first magnet 322, a second magnet 323 located above the first magnet 322, and two magnetically conductive blocks 324 arranged close to the N pole and S pole of the first magnet 322, respectively. The first magnet 322 and the two magnetically conductive blocks 324 are engaged in the first groove 320. The magnetically conductive blocks 324 are made of a high magnetic permeability material, preferably an alloy material with a high iron content. Two slots 325 are spaced apart along their circumference on the peripheral wall of the limiting cylinder 32. Each slot 325 contains a limiting buckle 326, which is a spring-loaded buckle comprising a plug 3261, a movable pin 3262, and a compression spring 3263. The plug 3261 seals the outward-facing end of the corresponding slot 325, while the movable pin 3262 is installed at the inward-facing end of the slot 325. The compression spring 3263 is housed within the slot 325, with its two ends abutting against the plug 3261 and the movable pin 3262, respectively, ensuring that the head of the movable pin 3262 always tends to protrude from the inner peripheral wall of the limiting cylinder 32. Furthermore, the outer peripheral wall of the movable pin 3262 has an outer step, and the inner peripheral wall of the slot 325 has an inner step. These features limit the movement of the movable pin 3262 towards the pressing rod 34, preventing the movable pin 3262 from disengaging from the slot 325.

[0050] The rotating rod 33 is installed inside the limiting cylinder 32. A second slot 331 is provided at the bottom end of the rotating rod 33, and the second magnet 323 is engaged in the second slot 331 so that the second magnet 323 can rotate with the rotating rod 33 relative to the first magnet 322; the cross-section of the rotating rod 33 is a regular hexagon.

[0051] The pressing rod 34 is installed inside the limiting cylinder 32. The bottom end of the pressing rod 34 has a slot 341 for the top end of the rotating rod 33 to be inserted. The inner peripheral wall contour of the slot 341 is slidably fitted with the outer peripheral wall contour of the rotating rod 33 so that the rotating rod 33 can rotate under the drive of the pressing rod 34 but does not move up and down with the pressing rod 34. Two sets of centrally symmetrical guide grooves 342 are provided on the outer peripheral wall of the pressing rod 34. Each set of guide grooves 342 includes a vertical section 3421 extending along the axial direction of the pressing rod 34 and an inclined section 3422 extending downward in a spiral shape from the top end of the vertical section 3421. The bottom end of the inclined section 3422 of the previous guide groove 342 is connected to the bottom end of the vertical section 3421 of the subsequent guide groove 342. The head of the aforementioned movable pin 3262 can be slidably inserted into the guide groove 342.

[0052] In this embodiment, the depth of the inclined section 3422 gradually decreases from the top to the bottom. The depth of the vertical section 3421 is the same as the depth of the bottom of the inclined section 3422 and less than the depth of the top of the inclined section 3422. This prevents the head of the movable pin 3262 from moving along the vertical section 3241 to the top of the inclined section 3422 and then returning to the original vertical section 3241. This ensures that the locking component 3 switches between the locked and unlocked states sequentially.

[0053] The elastic element 35 is a compression spring, which is sleeved on the outer periphery of the rotating rod 33. The two ends of the compression spring abut against the top surface of the magnetic block 324 and the bottom surface of the pressing rod 34, respectively, so that the pressing rod 34 always has the tendency to extend outward.

[0054] The aforementioned pressing rod 34 can drive the rotating rod 33 to rotate around the axis of the mounting hole 311 under the action of external force, so that the second magnet 323 rotates synchronously:

[0055] In the locked state, the magnetic poles of the first magnet 322 and the second magnet 323 are oriented in the same direction, so that the magnetic lines of force of the first magnet 322 and the second magnet 323 are partially exposed to the limiting cylinder 32 and adsorbed to the fixing seat 31, and the inner ring of the bearing 21 is limited between the limiting flange 321 and the volute 1.

[0056] In the unlocked state, the magnetic poles of the first magnet 322 and the second magnet 323 are facing opposite directions, so that the magnetic lines of force of the first magnet 322 and the second magnet 323 are located inside the magnetic block 324 and thus release the attraction to the fixed seat 31. In this way, the limiting cylinder 32 can be removed from the fixed seat 31 axially, so that the limiting flange 321 releases the limiting of the inner ring of the bearing 21.

[0057] The motor 4 is mounted on the outside of the volute 1, and its output shaft is connected to the impeller 2 via a transmission component. In this embodiment, the transmission component is a magnetic assembly; its specific structure can be found in the applicant's earlier Chinese patent application No. 202322931221.8, "Fan and Range Hood of the Same," which will not be elaborated here. This arrangement of the motor 4 and impeller 2 separately ensures that the motor 4 is not contaminated by oil during use, avoiding the need for motor cleaning.

[0058] The working principle of this embodiment is as follows:

[0059] (1) When installation is required, first, the impeller 2 is sleeved on the outer periphery of the fixed seat 31 through the bearing 21. Then, the limiting cylinder 32, rotating rod 33, pressing rod 34 and elastic element 35 are combined. Then, the lower part of the limiting cylinder 32 is inserted into the mounting hole 311. After insertion, the pressing rod 33 is pressed inward so that the head of the movable pin 3262 moves upward along the vertical section 3421 until it enters the top of the inclined section 3421. Then, the pressing rod 34 is released. The pressing rod 34 extends outward under the elastic force of the elastic element 35 so that the head of the movable pin 3262 moves downward along the inclined section 3421 until it reaches the bottom of the next vertical section 3421 (during this process, the rotating rod 33 continues to rotate 180°). This causes the second magnet 323 to rotate to the same position as the first magnet 322, so that the magnetic lines of the first magnet 322 and the second magnet 323 are partially exposed in the limiting cylinder 32 (externally appearing magnetic) and adsorbed into the fixed seat 31 to achieve locking (e.g. Figure 3 , Figure 7 and Figure 8 As shown), at this time, the inner ring of the bearing 21 is sandwiched between the limiting flange 321 and the volute 1, thus realizing the installation of the impeller 2 on the volute 1;

[0060] (2) When disassembly is required, simply press the pressing rod 33 inward to move the head of the movable pin 3262 upward along the vertical section 3421 until it enters the top of the inclined section 3421. Then release the pressing rod 34. The pressing rod 34 extends outward under the elastic force of the elastic member 35, so that the head of the movable pin 3262 moves downward along the inclined section 3421 until it reaches the bottom of the next vertical section 3421 (during this process, the rotating rod 33 continues to rotate 180°). This causes the second magnet 323 to rotate to a position where the magnetic poles face the opposite direction to the first magnet 322, so that the magnetic lines of force of the first magnet 322 and the second magnet 323 are located inside the magnetic block 324 (appearing non-magnetic to the outside), thereby releasing the adsorption of the fixed seat 31 and unlocking it (e.g. Figure 8 As shown), at this time, the limiting sleeve 32 can be removed from the fixed seat 31 so that the limiting flange 321 releases the limiting of the inner ring of the bearing 21. In this way, the impeller 2 can be removed from the fixed seat 31, and the impeller 2 can be disassembled.

Claims

1. An impeller mounting structure, comprising a volute (1), an impeller (2) and a locking assembly (3), wherein the impeller (2) is mounted in the volute (1) via the locking assembly (3), and characterized in that: The locking assembly (3) comprises The fixing seat (31) is a magnetic conductive part, fixed relative to the volute (1), and is provided with a mounting hole (311). The impeller (2) is sleeved on the outer periphery of the fixing seat (31) via a bearing (21); A limiting cylinder (32) extends along the axial direction of the mounting hole (311), the lower part of which is accommodated in the mounting hole (311), and the peripheral part of which is provided with a limiting flange (321) for limiting the inner ring of the bearing (21); a first magnet (322), a second magnet (323) located above the first magnet (322), and two magnetic conductive blocks (324) respectively arranged close to the N pole and the S pole of the first magnet (322); as well as A rotating rod (33) is installed in the limiting cylinder (32) and is used to drive the second magnet (323) to rotate relative to the first magnet (322); In a locked state, the magnetic poles of the first magnet (322) and the second magnet (323) are oriented in the same direction and adsorb the fixing seat (31), and the inner ring of the bearing (21) is limited to be located between the limiting flange (321) and the volute (1); In the unlocked state, the magnetic poles of the first magnet (322) and the second magnet (323) face opposite directions, thereby releasing the adsorption on the fixing seat (31), and the limiting flange (321) releases the limiting on the inner ring of the bearing (21).

2. The impeller mounting structure according to claim 1, characterized in that: The locking assembly (3) also includes A pressing rod (34) is installed in the limiting cylinder (32) and is transmission-connected to the rotating rod (33); and The elastic member (35) acts between the limiting cylinder (32) and the pressing rod (34) so ​​that the pressing rod (34) always has a tendency to extend outward.

3. The impeller mounting structure according to claim 2, characterized in that: Two groups of centrally symmetrical guide grooves (342) are provided on the outer peripheral wall of the pressing rod (34), each group of guide grooves (342) includes a vertical section (3421) extending along the axial direction of the pressing rod (34) and an inclined section (3422) extending downward in a spiral shape from the top of the vertical section (3421), and the bottom end of the inclined section (3422) of the previous guide groove (342) is connected to the bottom end of the vertical section (3421) of the next guide groove (342); A limiting buckle (326) is provided on the periphery of the limiting cylinder (32), and the head of the limiting buckle (326) can be slidably inserted into the guide groove (342); The top end of the rotating rod (33) is transmission-connected to the pressing rod (34) via a telescopic transmission mechanism, so that the rotating rod (33) can rotate under the drive of the pressing rod (34) but does not move up and down with the pressing rod (34).

4. The impeller mounting structure according to claim 3, characterized in that: The limiting buckle (326) is a spring buckle, the depth of the inclined section (3422) gradually decreases from the top to the bottom, the depth of the vertical section (3421) is the same as the depth of the bottom end of the inclined section (3422) and is less than the depth of the top end of the inclined section (3422).

5. The impeller mounting structure according to claim 4, characterized in that: The peripheral wall of the limiting cylinder (32) is provided with a hole groove (325), and the limiting buckle (326) includes A plug (3261) is used to seal the port at the outward end of the hole groove (325); A movable pin (3262) is installed at the port of the inner end of the hole groove (325); and The compression spring (3263) is accommodated in the hole groove (325), and its two ends are respectively abutted against the plug (3261) and the movable pin (3262), so that the head of the movable pin (3262) always has a tendency to be exposed from the inner wall of the limiting cylinder (32) and inserted into the guide groove (342).

6. The impeller mounting structure according to claim 5, characterized in that: The outer peripheral wall of the movable pin (3262) has an outer step, and the inner peripheral wall of the hole groove (325) has an inner step, which is used to limit the extreme position of the outer step of the movable pin (3262) moving toward the side of the pressing rod (34).

7. The impeller mounting structure according to claim 3, characterized in that: The number of the limiting buckles (326) is two, and they are arranged at intervals along the circumference of the limiting cylinder (32).

8. The impeller mounting structure according to claim 3, characterized in that: The cross section of the rotating rod (33) is non-circular, and the bottom end of the pressing rod (34) is provided with a slot (341) for inserting the rotating rod (33). The inner wall profile of the slot (341) is slidably inserted with the outer wall profile of the rotating rod (33), and the outer wall of the rotating rod (33) and the inner wall of the slot (341) constitute the telescopic transmission mechanism.

9. The impeller mounting structure according to claim 2, characterized in that: The elastic member (35) is a compression spring, which is sleeved on the outer circumference of the rotating rod (33), and the two ends of the compression spring respectively abut against the top surface of the magnetic conductive block (324) and the bottom surface of the pressing rod (34).

10. The impeller mounting structure according to claim 1, characterized in that: The bottom end of the limiting cylinder (32) is closed, and the bottom of the inner cavity of the limiting cylinder (32) has a first slot (320), and the first magnet (322) and the two magnetic conductive blocks (324) are clamped in the first slot (320).

11. The impeller mounting structure according to claim 1, characterized in that: A second slot (331) is provided at the bottom end of the rotating rod (33), and the second magnet (323) is clamped in the second slot (331).

12. The impeller mounting structure according to claim 1, characterized in that: In the locked state, the magnetic lines of force of the first magnet (322) and the second magnet (323) are at least partially exposed outside the limiting cylinder (32); in the unlocked state, the magnetic lines of force of the first magnet (322) and the second magnet (323) are located inside the magnetic conductive block (324).

13. The impeller mounting structure according to claim 1, characterized in that: The limiting cylinder (32) is coaxially arranged with the bearing (21).

14. The impeller mounting structure according to any one of claims 1 to 13, characterized in that: It also includes a motor (4), which is installed on the outside of the volute (1), and its output shaft is connected to the impeller (2) through a transmission member.

15. A range hood using the impeller mounting structure according to any one of claims 1 to 14.

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