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 accommodated in the mounting hole (311) of the fixed seat (31), and the periphery of the limiting cylinder (32) is provided with a limiting flange (321) for limiting the inner ring of the bearing (21); and a movable sleeve (33). The guide block (323) of the limiting cylinder (32) can be inserted into the guide groove (332) of the movable sleeve (33) in a sliding mode so that the movable sleeve (33) can spirally move around the pin shaft (322) under the action of external force, and then the locking block (331) of the movable sleeve (33) can enter and exit from the locking groove (3121) of the fixed seat (31). 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] A fixed seat is fixed relative to the volute, and is provided with a mounting hole, in which a locking seat with a locking groove is provided, and 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 part accommodated in the mounting hole, the circumference of which is provided with a limiting flange for limiting the inner ring of the bearing, the inner cavity of which is provided with a pin extending along its axial direction, and the inner circumferential wall of which is provided with an inwardly convex guide block; and

[0010] A movable sleeve is sleeved on the outer periphery of the pin shaft, and has a locking block on the periphery that can be inserted into the locking groove, and a guide groove extending in a spiral shape along its axial direction is opened on the peripheral wall;

[0011] The guide block can be slidably inserted in the guide groove, so that the movable sleeve can move spirally around the pin shaft under the action of external force, thereby making the locking block enter and exit the locking groove;

[0012] 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;

[0013] 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.

[0014] In order to facilitate the movement of the movable sleeve, the locking assembly also includes a pressing rod, which is installed in the limiting cylinder. The bottom of the pressing rod has a mounting portion, and the movable sleeve is installed on the mounting portion and can rotate around its own axis.

[0015] 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.

[0016] In order to facilitate the installation of the elastic part, a limiting boss is convexly provided on the inner wall of the limiting cylinder, an end cover is installed on the top of the pressing rod, and the elastic part is a compression spring, which is sleeved on the outer periphery of the pressing rod, and the two ends of the compression spring are respectively abutted against the limiting boss and the end cover.

[0017] In order to ensure aesthetics and prevent users from accidentally touching the end cover, in the locked state, the top surface of the end cover is flush with the end surface of the top of the limiting cylinder.

[0018] In order to realize the rotatable connection between the movable sleeve and the mounting part, an annular groove arranged along its circumference is opened on the peripheral wall of the upper part of the movable sleeve, and the mounting part is a mounting ring and is coaxially mounted in the annular groove.

[0019] In order to improve stability, the number of the pins is at least two, and they are arranged at intervals along the circumference of the limiting cylinder, and the mounting parts of the movable sleeve and the pressing rod correspond to the pins one by one.

[0020] In order to facilitate the formation of the locking groove, the bottom end of the mounting hole is closed, the locking seat is installed on the bottom wall inside the mounting hole, and the locking groove is opened on the peripheral wall of the locking seat along the circumferential direction.

[0021] In order to prevent the locking block from shaking in the locked state, in the locked state, the locking block is tightly attached to the top wall inside the locking groove.

[0022] In order to facilitate the formation of the guide block, a fixing pin is installed on the limiting cylinder, and the end of the fixing pin passes inwardly through the peripheral wall of the limiting cylinder to form the guide block.

[0023] In order to facilitate the arrangement of the pin shaft, the interior of the limiting cylinder is provided with a step hole, and the pin shaft is protruding downward on the step surface of the step hole.

[0024] In order to make full use of the travel of the guide groove,

[0025] In the locked state, the guide block is inserted at the bottom of the guide groove;

[0026] In the unlocked state, the guide block is inserted into the top of the guide groove.

[0027] In order to reduce the difficulty of processing, the limiting cylinder is coaxially arranged with the bearing.

[0028] 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.

[0029] The technical solution adopted by the utility model to solve the second technical problem is: a range hood with the impeller installation structure.

[0030] 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 movable sleeve, and the impeller is installed in the volute through the locking assembly; the guide block on the limiting cylinder can be slidably inserted in the guide groove on the movable sleeve, so that the movable sleeve can move in a spiral manner under the action of external force, and then the locking block on the movable sleeve can enter and exit the locking groove of 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

[0031] 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;

[0032] Figure 2 for Figure 1 A longitudinal cross-sectional view of

[0033] Figure 3 for Figure 2 Enlarged view of part I;

[0034] Figure 4 for Figure 3 A three-dimensional exploded schematic diagram of the middle locking assembly;

[0035] Figure 5 for Figure 3 A longitudinal cross-sectional view of the locking assembly in another direction;

[0036] Figure 6 for Figure 5 A schematic diagram of the three-dimensional structure of the middle locking assembly after omitting some components;

[0037] Figure 7 for Figure 5 A longitudinal sectional view of the middle locking assembly after it is switched to an unlocked state;

[0038] Figure 8 for Figure 7 The schematic diagram of the three-dimensional structure of the middle locking assembly after omitting some components. DETAILED DESCRIPTION

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] 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.

[0041] 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 .

[0042] The impeller 2 is installed in the volute 1 through a locking assembly 3 .

[0043] The locking assembly 3 includes a fixing seat 31 , a limiting cylinder 32 , a movable sleeve 33 , a pressing rod 34 and an elastic member 35 .

[0044] Specifically, the bottom of the fixing seat 31 has a fixing portion 310 for fixing on the volute 1; a mounting hole 311 extending along the axial direction of the impeller 2 is provided inside the fixing seat 31, and the bottom end of the mounting hole 311 is closed; a locking seat 312 is installed on the bottom wall inside the mounting hole 311, and a locking groove 3121 is provided on the peripheral wall of the locking seat 312 along the circumferential direction. The impeller 2 is sleeved on the outer periphery of the fixing seat 31 through the bearing 21.

[0045] 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. The interior of the limiting cylinder 32 has a stepped hole 320 that is small at the top and large at the bottom; 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 pin shaft 322 extending along the axial direction of the limiting cylinder 32 is convexly provided on the stepped surface of the step hole 320, and the number of the pin shafts 322 is three, and they are arranged in the large hole of the step hole 320 at intervals along the circumference of the limiting cylinder 32; three fixing pins arranged at intervals along the circumference are installed at the lower part of the limiting cylinder 32, and the end of each fixing pin passes through the circumferential wall of the limiting cylinder 32 inwardly to form an inwardly convex guide block 323; a ring-shaped limiting boss 324 is convexly provided on the inner peripheral wall of the limiting cylinder 32, and the limiting boss 324 is located at the bottom of the small hole of the step hole 320.

[0046] There are three movable sleeves 33, which correspond to the pin shafts 322 one by one, and each movable sleeve 33 is sleeved on the outer circumference of the corresponding pin shaft 322. A locking block 331 is protruded outwardly from the circumference of the lower part of each movable sleeve 33, and the locking block 331 can be inserted into the locking groove 3121; a guide groove 332 extending in a spiral shape along the axial direction is provided on the circumferential wall of each movable sleeve 33, and the guide blocks 323 correspond to the guide grooves 332 of each movable sleeve 33 one by one, and each guide block 323 can be slidably inserted into the corresponding guide groove 332; an annular groove 333 arranged along the circumferential direction is provided on the circumferential wall of the upper part of the movable sleeve 33.

[0047] The pressing rod 34 is installed in the stepped hole 320, and the above-mentioned limiting boss 324 is arranged around the outer circumference of the pressing rod 24. Three mounting rings 341 are arranged at intervals along the circumferential direction on the circumferential wall at the bottom of the pressing rod 34. Each mounting ring 341 corresponds to the above-mentioned movable sleeve 33 one by one and is coaxially installed in the annular groove 333 of the corresponding movable sleeve 33, so that the movable sleeve 33 can rotate around its own axis but cannot move axially; an end cover 342 is installed on the top of the pressing rod 34.

[0048] The elastic member 35 is a compression spring, which is sleeved on the outer circumference of the pressing rod 34 . The two ends of the compression spring are respectively abutted against the limiting boss 324 and the end cover 342 , so that the pressing rod 34 always has a tendency to extend upward.

[0049] The pressing rod 34 can drive the movable sleeve 33 to move along the axial direction of the pin shaft 322 under the action of external force. At the same time, due to the guiding cooperation between the guide block 323 and the guide groove 332, the movable sleeve 33 will rotate around the pin shaft 322 and move in a spiral manner while moving axially, thereby making the locking block 331 enter and exit the locking groove 3121.

[0050] In the locked state, Figure 3 , Figure 5 and Figure 6 As shown, the pressing rod 34 rises to the limit state, the top surface of the end cover 342 is flush with the end surface of the top of the limiting cylinder 32, the guide block 323 is inserted into the bottom of the guide groove 332, the locking block 331 is inserted into the locking groove 3121 and is tightly attached to the top wall inside the locking groove 3121, and the inner ring of the bearing 21 is clamped 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;

[0051] In the unlocked state, Figure 7 and Figure 8 As shown, the pressing rod 34 drops to the limit state, the guide block 323 is inserted at the top of the guide groove 332, and the locking block 331 is disengaged from the locking groove 3121. In this way, the limiting cylinder 32 can be removed from the fixing seat 31 along the axial direction to release the limiting flange 321 from limiting the inner ring of the bearing 21.

[0052] 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.

[0053] The working principle of this embodiment is as follows:

[0054] (1) When installation is required, the impeller 2 is first mounted on the outer periphery of the fixed seat 31 through the bearing 21, and then the limiting cylinder 32, the movable sleeve 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 extends outward under the elastic force of the elastic member 35, and drives the movable sleeve 33 to rise synchronously through the mounting ring 34. Due to the guiding cooperation between the guide block 323 and the guide groove 332, the movable sleeve 33 moves in a spiral manner during the rising process, so that the locking block 331 gradually enters the locking groove 3121, until the locking block 331 is tightly attached to the top wall inside the locking groove 3121 to achieve locking (as shown in the figure). Figure 3 , Figure 5and 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;

[0055] (2) When disassembly is required, the pressing rod 34 is pressed inwardly to drive the movable sleeve 33 to descend synchronously through the mounting ring 34. Due to the guiding cooperation between the guide block 323 and the guide groove 332, the movable sleeve 33 moves in a spiral motion during the descent process, so that the locking block 331 gradually disengages from the locking groove 3121 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 A fixed seat (31) is fixed relative to the volute (1) and is provided with a mounting hole (311). A locking seat (312) having a locking groove (3121) is provided in the mounting hole (311). The impeller (2) is sleeved on the outer periphery of the fixed 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), having a limiting flange (321) on the periphery for limiting the inner ring of the bearing (21), an inner cavity having a pin shaft (322) extending along the axial direction thereof, and an inner circumferential wall provided with an inwardly convex guide block (323); and A movable sleeve (33) is sleeved on the outer periphery of the pin shaft (322), the peripheral portion of which has a locking block (331) that can be inserted into the locking groove (3121), and the peripheral wall of which is provided with a guide groove (332) that extends in a spiral shape along its axial direction; The guide block (323) can be slidably inserted into the guide groove (332), so that the movable sleeve (33) can move in a spiral manner around the pin shaft (322) under the action of external force, thereby making the locking block (331) enter and exit the locking groove (3121); In the locked state, the locking block (331) is inserted into the locking groove (3121), 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 (3121), 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 locking assembly (3) further comprises a pressing rod (34), which is installed in the limiting cylinder (32). The bottom of the pressing rod (34) has a mounting portion, and the movable sleeve (33) is installed on the mounting portion and can rotate around its own axis.

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: A limiting boss (324) is convexly provided on the inner circumferential wall of the limiting cylinder (32), an end cover (342) is installed on the top of the pressing rod (34), and the elastic member (35) is a compression spring, which is sleeved on the outer circumference of the pressing rod (34), and the two ends of the compression spring are respectively abutted against the limiting boss (324) and the end cover (342).

5. The impeller mounting structure according to claim 4, characterized in that: In the locked state, the top surface of the end cover (342) is flush with the end surface of the top of the limiting cylinder (32).

6. The impeller mounting structure according to claim 2, characterized in that: An annular groove (333) arranged along the circumference of the upper part of the movable sleeve (33) is provided on the circumferential wall thereof, and the mounting portion is a mounting ring (341) which is coaxially mounted in the annular groove (333).

7. The impeller mounting structure according to claim 2, characterized in that: The number of the pin shafts (322) is at least two, and they are arranged at intervals along the circumference of the limiting cylinder (32), and the mounting parts of the movable sleeve (33) and the pressing rod (34) correspond one-to-one to the pin shafts (322).

8. The impeller mounting structure according to claim 1, characterized in that: The bottom end of the mounting hole (311) is closed, the locking seat (312) is mounted on the bottom wall inside the mounting hole (311), and the locking groove (3121) is provided on the peripheral wall of the locking seat (312) along the circumferential direction.

9. The impeller mounting structure according to claim 8, characterized in that: In the locked state, the locking block (331) is tightly attached to the top wall inside the locking groove (3121).

10. The impeller mounting structure according to claim 1, characterized in that: A fixing pin is installed on the limiting cylinder (32), and the end of the fixing pin passes inwardly through the peripheral wall of the limiting cylinder (32) to form the guide block (323).

11. The impeller mounting structure according to claim 1, characterized in that: The limiting cylinder (32) has a stepped hole (320) inside, and the pin shaft (322) is protruding downward on the stepped surface of the stepped hole (320).

12. The impeller mounting structure according to claim 1, characterized in that: In the locked state, the guide block (323) is inserted into the bottom of the guide groove (332); In the unlocked state, the guide block (323) is inserted into the top of the guide groove (332).

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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