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), 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 arranged on the periphery of the fixed seat (31) in a sleeving manner, and the periphery of the limiting cylinder (32) is provided with a limiting flange (321) for limiting an inner ring of the bearing (21); the pressing rod (33) is installed in the limiting cylinder (32), and the periphery of the pressing rod (33) is provided with a locking block (331) capable of entering and exiting the locking groove (313) through the guide groove (312) of the fixing base (31); the first elastic piece (34) acts between the fixed seat (31) and the pressing rod (33); and the second elastic piece (35) acts between the limiting cylinder (32) and the pressing rod (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, which is then accelerated by the fan and 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 fixing seat is fixed relative to the volute, and is provided with a mounting hole. A guide groove extending spirally downward from the top of the fixing seat and a locking groove at the tail of the guide groove are provided on the circumferential wall inside the mounting hole. The impeller is sleeved on the outer periphery of the fixing seat through a bearing;

[0009] A limiting cylinder extends along the axial direction of the mounting hole, the lower part of which is sleeved on the outer periphery of the fixing seat, and the peripheral part of which is provided with a limiting flange for limiting the inner ring of the bearing;

[0010] A pressing rod is installed in the limiting cylinder, the lower part of which can be inserted into the installation hole, and the peripheral part has a locking block that can enter and exit the locking groove through the guide groove;

[0011] A first elastic member, acting between the fixing seat and the pressing rod, so that the pressing rod always has a tendency to extend outward; and

[0012] A second elastic member acts between the limiting cylinder and the pressing rod to make the limiting cylinder always have a downward pressing tendency;

[0013] In the locked state, the locking block is inserted into the locking groove, and the inner ring of the bearing is limited to be located between the limiting flange and the volute;

[0014] In the unlocked state, the locking block is disengaged from the locking groove, and the limiting flange releases the limiting action on the inner ring of the bearing.

[0015] To facilitate the installation of the first elastic member, the bottom end of the mounting hole is closed, a mounting column is protruding from the bottom wall inside the mounting hole, a cap supported on the bottom of the pressing rod is accommodated in the mounting hole, the first elastic member is a compression spring, which is sleeved on the outer periphery of the mounting column, and the two ends of the compression spring are respectively abutted against the bottom wall and the cap inside the mounting hole.

[0016] In order to prevent the cap from falling off the mounting hole, the fixing seat, the first elastic member and the cap form an integral assembly, and a first retaining ring for limiting the upper limit position of the cap is installed on the peripheral wall inside the mounting hole.

[0017] To facilitate the installation of the second elastic member, a first limiting boss is protruding on the inner circumferential wall at the bottom of the limiting cylinder, and a second limiting boss is protruding on the outer circumferential wall at the top of the pressing rod. The second elastic member is a compression spring, which is sleeved on the outer circumference of the pressing rod, and the two ends of the compression spring are respectively abutted against the first limiting boss and the second limiting boss.

[0018] In order to prevent the pressing rod from being separated from the limiting cylinder, the limiting cylinder, the pressing rod and the second elastic member form an integral assembly, and a second retaining ring for limiting the upper limit position of the second limiting boss is installed on the inner peripheral wall of the limiting cylinder.

[0019] In order to facilitate the user to rotate the pressing rod, a rotating handle is protruded on the end surface of the top of the pressing rod.

[0020] In order to facilitate the insertion of the locking block into the opening at the head portion, ie, the top portion, of the guide groove, the direction of the rotary handle is consistent with the direction of the locking block.

[0021] In order to prevent the locking block from being easily disengaged from the locking groove, the locking groove is formed by extending upward from the tail end of the guide groove.

[0022] In order to reduce the difficulty of processing, the limiting cylinder is coaxially arranged with the bearing.

[0023] 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.

[0024] The technical solution adopted by the utility model to solve the second technical problem is: a range hood with the impeller installation structure.

[0025] Compared with the prior art, the advantages of the utility model are: it is composed of a fixed seat, a limiting cylinder, a pressing rod, a first elastic member and a second elastic member, and the impeller is installed in the volute through a locking assembly. The locking block on the pressing rod can enter and exit the locking groove through the guide groove on the fixed seat to achieve locking or unlocking. 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

[0026] 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;

[0027] Figure 2 for Figure 1 A longitudinal cross-sectional view of

[0028] Figure 3 for Figure 2 Enlarged view of part I;

[0029] Figure 4 for Figure 3 Schematic diagram of the three-dimensional exploded view of the middle locking assembly. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] 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.

[0032] like Figures 1 to 4 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 .

[0033] The impeller 2 is installed in the volute 1 through a locking assembly 3 .

[0034] The locking assembly 3 includes a fixing seat 31 , a limiting cylinder 32 , a pressing rod 33 , a first elastic member 34 and a second elastic member 35 .

[0035] 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, the bottom end of the mounting hole 311 is closed, a mounting column 3111 is convexly provided on the bottom wall inside the mounting hole 311, and a cap 3112 is accommodated in the mounting hole 311; the peripheral wall inside the mounting hole 311 is provided with a guide groove 312 extending downward in a spiral shape from the top of the fixing seat 31 and a locking groove 313 extending upward from the tail end, i.e., the bottom end, of the guide groove 312. The impeller 2 is sleeved on the outer periphery of the fixing seat 31 through the bearing 21.

[0036] The limiting cylinder 32 extends along the axial direction of the mounting hole 311, is coaxially arranged with the bearing 21, and the lower part is sleeved on the outer periphery of the fixing seat 31. A limiting flange 321 for limiting the inner ring of the bearing 21 is convexly provided on the outer peripheral wall at the bottom of the limiting cylinder 32; a first limiting boss 322 is convexly provided on the inner peripheral wall at the bottom of the limiting cylinder 32.

[0037] The pressing rod 33 is installed in the limiting cylinder 32, and the lower part can be inserted into the installation hole 311. A locking block 331 is convexly provided on the outer peripheral wall of the lower part of the pressing rod 33, and the locking block 331 can enter and exit the locking groove 313 through the guide groove 312; a second limiting boss 332 is convexly provided on the outer peripheral wall of the top of the pressing rod 33; a rotary handle 333 is convexly provided on the end surface of the top of the pressing rod 33, and the direction of the rotary handle 333 is consistent with that of the locking block 331, so that the locking block 331 can be inserted into the opening at the head of the guide groove 312, i.e., the top.

[0038] The first elastic member 34 is a compression spring, which is sleeved on the outer periphery of the mounting column 3111. The two ends of the compression spring are respectively in contact with the bottom wall inside the mounting hole 311 and the cap 3112, and the cap 3112 is supported on the bottom of the pressing rod 33, so that the pressing rod 33 always has a tendency to extend outward. In addition, a first retaining ring 3113 is installed on the peripheral wall inside the mounting hole 311 to limit the upper limit position of the cap 3112, so as to prevent the cap 3112 from detaching from the mounting hole 311, so that the fixing seat 31, the first elastic member 34 and the cap 3112 constitute an integral component.

[0039] The second elastic member 35 is a compression spring, which is sleeved on the outer circumference of the pressing rod 33, and the two ends of the compression spring are respectively abutted on the first limiting boss 322 and the second limiting boss 332, so that the limiting cylinder 32 always has a downward pressing tendency. In addition, a second retaining ring 323 for limiting the upper limit position of the second limiting boss 332 is installed on the circumferential wall inside the limiting cylinder 32, so as to prevent the pressing rod 33 from being separated from the limiting cylinder 32, so that the limiting cylinder 32, the pressing rod 33 and the second elastic member 35 constitute an integral component.

[0040] The pressing rod 33 can be inserted into the mounting hole 311 under the action of external force, and during this process, the locking block 331 can enter the locking groove 313 through the guide groove 312;

[0041] In the locked state, the locking block 331 is inserted into the locking groove 313, and the inner ring of the bearing 21 is limited between the limiting flange 321 and the volute 1;

[0042] In the unlocked state, the locking block 331 is separated from the locking groove 313 , and the limiting flange 321 releases the limiting function on the inner ring of the bearing 21 .

[0043] 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.

[0044] The working principle of this embodiment is as follows:

[0045] (1) When installation is required, the impeller 2 is first sleeved on the outer periphery of the fixing seat 31 through the bearing 21, and then the first elastic member 34 and the cap 3112 are sequentially placed in the fixing seat 31, and then the limiting cylinder 32, the pressing rod 33 and the second elastic member 35 are assembled, and the pressing rod 33 is pressed inwardly, and at the same time, the locking block 331 is aligned with the opening at the top of the guide groove 312 and inserted until the locking block 331 is inserted into place along the guide groove 312 (the locking block 331 moves to the bottom of the guide groove 312), and then the pressing rod 33 is released. The pressing rod 33 is extended outward under the elastic force of the first elastic member 33, so that the locking block 331 enters the locking groove 313 to achieve locking (such as Figure 3 As shown), at this time, under the elastic force of the second elastic member 35, the limiting flange 321 is pressed tightly against the top surface of the inner ring of the bearing 21, so that the inner ring of the bearing 21 is sandwiched between the limiting flange 321 and the volute 1, thereby realizing the installation of the impeller 2 on the volute 1;

[0046] (2) When disassembly is required, it is only necessary to press the pressing rod 33 inwardly so that the locking block 331 disengages from the locking groove 313 and enters the bottom end of the guide groove 312, and then rotate the rotary handle 333 so that the locking block 331 deviates from the locking groove 313 along the guide groove 312, and then release the pressing rod 33. The pressing rod 33 extends outward under the elastic force of the first elastic member 33 until the locking block 331 disengages from the fixing seat 31 along the guide groove 312 to be unlocked. At this time, the limiting cylinder 32 can be removed from the fixing seat 31, so that the limiting flange 321 releases the limit 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 fixed relative to the volute (1) and is provided with a mounting hole (311). A guide groove (312) extending downward in a spiral shape from the top of the fixing seat (31) and a locking groove (313) located at the tail of the guide groove (312) are provided on the circumferential wall inside the 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 portion of which is sleeved on the outer circumference of the fixing seat (31), and the circumference of which is provided with a limiting flange (321) for limiting the inner ring of the bearing (21); A pressing rod (33) is installed in the limiting cylinder (32), the lower part of which can be inserted into the installation hole (311), and the peripheral part of which is provided with a locking block (331) which can enter and exit the locking groove (313) through the guide groove (312); A first elastic member (34) acts between the fixing seat (31) and the pressing rod (33) so that the pressing rod (33) always has a tendency to extend outward; and A second elastic member (35) acts between the limiting cylinder (32) and the pressing rod (33) so that the limiting cylinder (32) always has a downward pressing tendency; In the locked state, the locking block (331) is inserted into the locking groove (313), 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 locking block (331) is disengaged from the locking groove (313), and the limiting flange (321) releases the limiting function on the inner ring of the bearing (21).

2. The impeller mounting structure according to claim 1, characterized in that: The bottom end of the mounting hole (311) is closed, and a mounting column (3111) is protruding on the bottom wall inside the mounting hole (311). A cap (3112) supported on the bottom of the pressing rod (33) is accommodated in the mounting hole (311), and the first elastic member (34) is a compression spring, which is sleeved on the outer periphery of the mounting column (3111), and the two ends of the compression spring are respectively abutted against the bottom wall inside the mounting hole (311) and the cap (3112).

3. The impeller mounting structure according to claim 2, characterized in that: A first retaining ring (3113) for limiting the upper limit position of the cap (3112) is installed on the inner peripheral wall of the mounting hole (311).

4. The impeller mounting structure according to claim 1, characterized in that: A first limiting boss (322) is convexly provided on the inner peripheral wall at the bottom of the limiting cylinder (32), and a second limiting boss (332) is convexly provided on the outer peripheral wall at the top of the pressing rod (33). The second elastic member (35) is a compression spring, which is sleeved on the outer periphery of the pressing rod (33), and the two ends of the compression spring are respectively abutted against the first limiting boss (322) and the second limiting boss (332).

5. The impeller mounting structure according to claim 4, characterized in that: A second retaining ring (323) for limiting the upper limit position of the second limiting boss (332) is installed on the inner peripheral wall of the limiting cylinder (32).

6. The impeller mounting structure according to claim 1, characterized in that: A rotating handle (333) is convexly provided on the end surface of the top of the pressing rod (33).

7. The impeller mounting structure according to claim 6, characterized in that: The direction of the rotating handle (333) is consistent with the direction of the locking block (331).

8. The impeller mounting structure according to claim 1, characterized in that: The locking groove (313) is formed by extending upward from the rear end of the guide groove (312).

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

10. The impeller mounting structure according to any one of claims 1 to 9, 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.

11. A range hood using the impeller mounting structure according to any one of claims 1 to 10.

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