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 the limiting cylinder (32) comprises two symmetrically arranged magnetic conductive brackets (32a) and a non-magnetic conductive bracket (32b) separated between the two magnetic conductive brackets (32a); and the rotating column (33) is rotatably mounted in the limiting cylinder (32), and a magnet (331) is embedded in the rotating column (33). The utility model further discloses a range hood applying the impeller mounting structure.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen equipment, in particular to an impeller mounting structure and a range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. A centrifugal fan installed inside the range hood absorbs and exhausts oil smoke, and uses a filter to filter out some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil smoke under the range hood into the fan. After being accelerated by the fan, it is collected by the volute and guided to be discharged outdoors.

[0003] However, after long-term use of the range hood, the impeller on the internal fan will be covered with oil, resulting in reduced exhaust efficiency, increased noise and other problems. Therefore, it is necessary to regularly disassemble and clean the impeller, which is conducive to efficient exhaust, prolongs the service life of the range hood, and saves electricity.

[0004] At present, the impellers of most range hoods are fixed by nuts. For details, please refer to the Chinese patent "Centrifugal Fan" with patent application number 202220245829.8. Therefore, when disassembling the impeller, it is generally necessary to fix the impeller first, and then unscrew the nut to disassemble it. However, since the blades on the impeller are thin, it is easy to cause the blades to deform during disassembly and assembly, affecting the performance of the fan. At the same time, it is difficult to control the strength when disassembling the nut. If the nut is installed too loosely, it may cause the nut to fall off during the use of the range hood, which poses a greater safety risk; if it is too tight, it will make it more difficult to disassemble next time. This greatly increases the difficulty of disassembling the impeller. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide an impeller installation structure which can avoid blade deformation and is simple and fast to install and disassemble, in view of the current status of the prior art.

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

[0007] The utility model solves the above-mentioned first technical problem by adopting the following technical solution: an impeller installation structure, comprising a volute, an impeller and a locking assembly, wherein the impeller is installed in the volute through the locking assembly, and is characterized in that: the locking assembly comprises

[0008] The fixed seat is a magnetic conductive part, fixed relative to the volute, and is provided with a mounting hole. The impeller is sleeved on the outer periphery of the fixed seat through a bearing;

[0009] A limiting cylinder, extending along the axial direction of the mounting hole, with the lower portion accommodated in the mounting hole, and having a limiting flange on the periphery for limiting the inner ring of the bearing, comprising two symmetrically arranged magnetic conductive brackets and a non-magnetic conductive bracket separated between the two magnetic conductive brackets, wherein a rotating cavity is surrounded and formed between the two magnetic conductive brackets and the non-magnetic conductive bracket; and

[0010] A rotating column is rotatably mounted in the rotating cavity and has a magnet embedded therein;

[0011] In the locked state, the magnetic force lines of the magnet are at least partially exposed to the limiting cylinder and adsorbed to the fixing seat, and the inner ring of the bearing is limited to be located between the limiting flange and the volute;

[0012] In the unlocked state, the magnetic lines of force of the magnet are located in the magnetic conductive bracket to release the adsorption of the fixing seat, and the limiting flange releases the limitation on the inner ring of the bearing.

[0013] In order to facilitate the driving of the rotating column to rotate, an upward-opening mounting groove is formed between the two magnetic conductive brackets and the non-magnetic conductive bracket. The locking assembly also includes a pressing rod, which is installed in the mounting groove. The bottom end of the pressing rod extends into the rotating cavity and is transmission-connected to the rotating column.

[0014] In order to keep the locking assembly in a locked state without external force, the locking assembly also includes an elastic member, which acts between the limiting cylinder and the pressing rod so that the pressing rod always has a tendency to extend outward, thereby keeping the locking assembly in a locked state.

[0015] To facilitate the installation of the elastic member, the top of the pressing rod has an end cover. The elastic member is a compression spring accommodated in the installation groove. The two ends of the compression spring respectively abut against the bottom wall inside the installation groove and the bottom surface of the end cover.

[0016] In order to prevent the pressing rod from being separated from the limiting cylinder, the limiting cylinder, the pressing rod and the elastic member form an integral assembly, and a retaining ring for limiting the upper limit position of the end cover is installed on the inner peripheral wall of the limiting cylinder.

[0017] In order to realize the transmission connection between the rotating column and the pressing rod, a plurality of tooth grooves are arranged at intervals along its circumference on the outer peripheral wall of the rotating column, and a plurality of convex teeth are arranged at intervals along its length direction on the side of the pressing rod, and the convex teeth are meshed with the tooth grooves.

[0018] In order to ensure that the rotating column rotates into place, a limiting groove extending in the circumferential direction is provided on the circumferential wall inside the rotating cavity, and a limiting block is convexly provided on the outer circumferential wall of the rotating column, and the limiting block can be slidably accommodated in the limiting groove;

[0019] In the locked state, the limit block is limited to the head of the limit groove;

[0020] In the unlocked state, the limiting block is limited to the tail of the limiting groove.

[0021] In order to facilitate accurate arrangement of the magnetic lines of force of the magnet, in the locked state, the magnetic poles of the magnet are oriented perpendicular to the extension direction of the non-magnetic bracket; in the unlocked state, the magnetic poles of the magnet are oriented parallel to the extension direction of the non-magnetic bracket.

[0022] In order to reduce the space occupied by the rotating column as much as possible, the rotation axis of the rotating column is perpendicular to the axis of the limiting cylinder.

[0023] In order to reduce the difficulty of processing, the limiting cylinder is coaxially arranged with the bearing.

[0024] In order to ensure that the motor is not contaminated by oil when the range hood is in use, a motor is also included. The motor is installed on the outside of the volute, and its output shaft is connected to the impeller through a transmission member.

[0025] The technical solution adopted by the utility model to solve the second technical problem is: a range hood with the impeller installation structure.

[0026] Compared with the prior art, the advantages of the utility model are: a locking assembly is composed of a fixed seat, a limiting cylinder and a rotating column, and the impeller is installed in the volute through the locking assembly; the magnet in the rotating block can adsorb the fixed seat or release the adsorption to achieve locking or unlocking during the rotation of the rotating block; in this way, the user does not need to fix the impeller when loading and unloading the impeller, which effectively avoids the deformation of the blades in the impeller and does not require the aid of tools. The loading and unloading is simple and fast, which is convenient for users to clean the range hood by themselves. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the impeller mounting structure in the embodiment of the range hood of the utility model in a locked state;

[0028] Figure 2 for Figure 1 A longitudinal cross-sectional view of

[0029] Figure 3 for Figure 2 Enlarged view of part I;

[0030] Figure 4 for Figure 3 A three-dimensional exploded schematic diagram of the middle locking assembly;

[0031] Figure 5 for Figure 3a longitudinal sectional view of the middle locking assembly;

[0032] Figure 6 for Figure 5 Schematic diagram of magnetic field lines of the magnet in the middle;

[0033] Figure 7 for Figure 5 A longitudinal sectional view of the middle locking assembly after it is switched to an unlocked state;

[0034] Figure 8 for Figure 7 Schematic diagram of the magnetic field lines of the magnet. DETAILED DESCRIPTION

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0037] like Figures 1 to 8 FIG. 1 is a preferred embodiment of a range hood with an impeller mounting structure according to the utility model. The impeller mounting structure includes a volute 1 , an impeller 2 , a locking assembly 3 and a motor 4 .

[0038] The impeller 2 is installed in the volute 1 through a locking assembly 3 .

[0039] The locking assembly 3 includes a fixing seat 31 , a limiting cylinder 32 , a rotating column 33 , a pressing rod 34 and an elastic member 35 .

[0040] Specifically, the bottom of the fixing seat 31 has a fixing portion 310 for fixing on the volute 1; the fixing seat 31 has a mounting hole 311 extending along the axial direction of 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 seat 31 through the bearing 21. In this embodiment, the fixing seat 31 is a magnetic conductive member, which is made of a high magnetic conductive material, preferably an alloy material with a high iron content.

[0041] The limiting cylinder 32 extends along the axial direction of the mounting hole 311 and is arranged coaxially with the bearing 21, and the lower part of the limiting cylinder 32 is accommodated in the mounting hole 311. In this embodiment, the limiting cylinder 32 includes two symmetrically arranged magnetic brackets 32a and a non-magnetic bracket 32b separated between the two magnetic brackets 32a, the magnetic bracket 32a is made of a magnetic metal material, and the non-magnetic bracket 32b is made of a non-magnetic metal material; a limiting flange 321 for limiting the inner ring of the bearing 21 is convexly provided on the outer peripheral wall of the middle part of the limiting cylinder 32; a rotating cavity 322 is surrounded and formed between the lower parts of the two magnetic brackets 32a and the non-magnetic bracket 32b, and a limiting groove 3221 extending in the circumferential direction is opened on the peripheral wall inside the rotating cavity 322; a mounting groove 323 with an opening facing upward is surrounded and formed between the upper parts of the two magnetic brackets 32a and the non-magnetic bracket 32b.

[0042] The rotating column 33 is rotatably mounted in the rotating cavity 322, and the rotation axis of the rotating column 33 is perpendicular to the axis of the limiting cylinder 32. A magnet 331 is embedded in the rotating column 33, and the N pole and S pole of the magnet 331 are arranged corresponding to the opposite sides of the circumference of the rotating column 33; a plurality of tooth grooves 332 are arranged at intervals along the circumference of the rotating column 33; a limiting block 333 is convexly provided on the outer circumferential wall of the rotating column 33, and the limiting block 333 can be slidably accommodated in the above-mentioned limiting groove 3221.

[0043] The pressing rod 34 is installed in the installation groove 323, and its bottom end extends downward and extends into the rotating cavity 322. The top of the pressing rod 34 has an end cap 341; the side of the pressing rod 34 is provided with a plurality of convex teeth 342 arranged at intervals along the length direction thereof, and the convex teeth 342 mesh with the tooth grooves 332, thereby realizing the transmission connection between the pressing rod 34 and the rotating column 33.

[0044] The elastic member 35 is a compression spring, which is accommodated in the installation groove 323. The two ends of the compression spring are respectively in contact with the bottom wall inside the installation groove 323 and the bottom surface of the end cover 341, so that the pressing rod 34 always has a tendency to extend outward. In addition, a retaining ring 324 is installed on the peripheral wall inside the limiting cylinder 32 to limit the upper limit position of the end cover 341, thereby preventing the pressing rod 34 from detaching from the limiting cylinder 32, so that the limiting cylinder 32, the pressing rod 34 and the elastic member 35 constitute an integral component.

[0045] The pressing rod 34 can drive the rotating column 33 to rotate under the action of external force, so that the magnet 331 rotates synchronously;

[0046] In the locked state, the pressing rod 34 rises to the limit state, the limiting block 333 is limited at the head of the limiting groove 3221, and the magnetic pole of the magnet 331 is perpendicular to the extension direction of the non-magnetic bracket 32b, so that the magnetic force lines of the magnet 331 are partially exposed at the bottom of 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, and is kept in the locked state under the elastic force of the elastic member 35;

[0047] In the unlocked state, the pressing rod 34 drops to the limit state, the limit block 333 is limited to the tail of the limit groove 3221, and the magnetic pole of the magnet 331 is parallel to the extension direction of the non-magnetic bracket 32b, so that the magnetic lines of force of the magnet 331 are located in the magnetic bracket 32a and the adsorption on the fixed seat 31 is released. In this way, the limit cylinder 32 can be removed from the fixed seat 31 along the axial direction to release the limit flange 321 from the inner ring of the bearing 21.

[0048] The motor 4 is installed on the outside of the volute 1, and its output shaft is connected to the impeller 2 through a transmission member. In this embodiment, the transmission member is a magnetic component. The specific structure can be found in the Chinese patent application number 202322931221.8 of the applicant's previous application "Blower and Range Hood thereof", which will not be repeated here. In this way, the motor 4 is separated from the impeller 2 to ensure that the motor 4 is not contaminated by oil when the range hood is in use, avoiding the need for motor cleaning.

[0049] The working principle of this embodiment is as follows:

[0050] (1) When installation is required, the impeller 2 is first mounted on the outer periphery of the fixing seat 31 through the bearing 21, and then the limiting cylinder 32, the rotating column 33, the pressing rod 34 and the elastic member 35 are assembled. Then, the pressing rod 34 is pressed inwardly, and at the same time, the lower part of the limiting cylinder 32 is inserted into the mounting hole 311. After being inserted into place (such as Figure 7 and Figure 8 As shown in the figure, the pressing rod 34 is released, and the pressing rod 34 is extended outward under the elastic force of the elastic member 35, driving the magnet 331 to rotate 90 degrees counterclockwise along with the rotating column 33, until the limiting block 333 moves to the head of the limiting groove 3221, and the magnetic pole of the magnet 331 is perpendicular to the extension direction of the non-magnetic bracket 32b, so that the magnetic force lines of the magnet 331 are partially exposed at the bottom of the limiting cylinder 32 (showing magnetic properties to the outside) and the fixing seat 31 is adsorbed to achieve locking (as shown in the figure). Figure 3 , Figure 5 and Figure 6 As shown), at this time, the inner ring of the bearing 21 is clamped between the limiting flange 321 and the volute 1, so that the impeller 2 is installed on the volute 1;

[0051] (2) When disassembly is required, the pressing rod 34 only needs to be pressed inward, driving the magnet 331 to rotate 90° in the clockwise direction along with the rotating column 33, until the limit block 333 is limited to the tail of the limit groove 3221, and the magnetic pole of the magnet 331 is parallel to the extension direction of the non-magnetic bracket 32b, so that the magnetic force lines of the magnet 331 are located in the magnetic bracket 32a (showing no magnetism to the outside), thereby releasing the adsorption of the fixing seat 31 to achieve unlocking (such as Figure 7 and Figure 8 As shown), at this time, the limiting cylinder 32 can be removed from the fixing seat 31 along the axial direction, so that the limiting flange 321 releases the limitation on the inner ring of the bearing 21. In this way, the impeller 2 can be removed from the fixing seat 31, and the disassembly of the impeller 2 is completed.

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), extending along the axial direction of the mounting hole (311), with the lower portion accommodated in the mounting hole (311), and having a limiting flange (321) on the periphery for limiting the inner ring of the bearing (21), comprising two symmetrically arranged magnetic conductive brackets (32a) and a non-magnetic conductive bracket (32b) separated between the two magnetic conductive brackets (32a), and a rotating cavity (322) is formed between the two magnetic conductive brackets (32a) and the non-magnetic conductive bracket (32b); and A rotating column (33) is rotatably mounted in the rotating cavity (322) and has a magnet (331) embedded therein; In the locked state, the magnetic lines of force of the magnet (331) are at least partially exposed to the limiting cylinder (32) and adsorbed to 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 lines of force of the magnet (331) are located in the magnetic conductive bracket (32a) to release the adsorption of the fixing seat (31), and the limiting flange (321) releases the limit on the inner ring of the bearing (21).

2. The impeller mounting structure according to claim 1, characterized in that: An upwardly opening mounting groove (323) is formed between the two magnetically conductive brackets (32a) and the non-magnetically conductive bracket (32b), and the locking assembly (3) further includes a pressing rod (34), which is installed in the mounting groove (323), and the bottom end of the pressing rod (34) extends into the rotating cavity (322) and is transmission-connected to the rotating column (33).

3. The impeller mounting structure according to claim 2, characterized in that: The locking assembly (3) further comprises an elastic member (35), which acts between the limiting cylinder (32) and the pressing rod (34) so ​​that the pressing rod (34) always has a tendency to extend outward, thereby keeping the locking assembly (3) in a locked state.

4. The impeller mounting structure according to claim 3, characterized in that: The top of the pressing rod (34) is provided with an end cover (341), and the elastic member (35) is a compression spring, which is accommodated in the installation groove (323), and the two ends of the compression spring respectively abut against the bottom wall inside the installation groove (323) and the bottom surface of the end cover (341).

5. The impeller mounting structure according to claim 4, characterized in that: A retaining ring (324) for limiting the upper limit position of the end cover (341) is installed on the inner peripheral wall of the limiting cylinder (32).

6. The impeller mounting structure according to claim 2, characterized in that: The outer peripheral wall of the rotating column (33) is provided with a plurality of tooth grooves (332) arranged at intervals along its circumference, and the side of the pressing rod (34) is provided with a plurality of convex teeth (342) arranged at intervals along its length direction, and the convex teeth (342) are meshed with the tooth grooves (332).

7. The impeller mounting structure according to claim 6, characterized in that: A limiting groove (3221) extending in the circumferential direction is provided on the circumferential wall inside the rotating cavity (322), and a limiting block (333) is convexly provided on the outer circumferential wall of the rotating column (33), and the limiting block (333) can be slidably accommodated in the limiting groove (3221); In the locked state, the limiting block (333) is limited at the head of the limiting groove (3221); In the unlocked state, the limiting block (333) is limited at the tail of the limiting groove (3221).

8. The impeller mounting structure according to claim 1, characterized in that: In a locked state, the magnetic poles of the magnet (331) are oriented perpendicular to the extension direction of the non-magnetic bracket (32b); in an unlocked state, the magnetic poles of the magnet (331) are oriented parallel to the extension direction of the non-magnetic bracket (32b).

9. The impeller mounting structure according to claim 1, characterized in that: The rotation axis of the rotating column (33) is perpendicular to the axis of the limiting cylinder (32).

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

11. The impeller mounting structure according to any one of claims 1 to 10, 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.

12. A range hood using the impeller mounting structure according to any one of claims 1 to 11.

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