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), the fixed seat (31) is fixed relative to the volute (1) and is provided with a mounting hole (311), a stopping part (3111) is convexly arranged on the peripheral wall of the mounting hole (311), and the impeller (2) is sleeved on the periphery of the fixed seat (31) through a bearing (21); the limiting cylinder (32) extends in the axial direction of the mounting hole (311), the lower portion of the limiting cylinder (32) is contained in the mounting hole (311), and a limiting flange (321) used for limiting an inner ring of the bearing (21) is arranged on the periphery of the limiting cylinder (32); and the rotating block (33) is rotationally connected to the limiting cylinder (32), and the side part of the rotating block (33) is provided with a locking block (331) which can be limited below the stop part (3111). 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. A stopper is convexly provided on the peripheral wall of the 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 a lower portion accommodated in the mounting hole and a circumferential portion having a limiting flange for limiting the inner ring of the bearing; and

[0010] A rotating block is rotatably connected to the limiting cylinder, and has a locking block on its side that can be limited to be located below the stopper;

[0011] In the locked state, the locking block is located below the stopper, and the inner ring of the bearing is located between the limiting flange and the volute;

[0012] In the unlocked state, the locking block is disengaged from the limiting position of the stopper, and the limiting flange releases the limiting position on the inner ring of the bearing.

[0013] In order to facilitate driving the rotating block to rotate, the locking assembly also includes a pressing rod, which is installed in the limiting cylinder and is transmission-connected to the rotating block.

[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 part, the bottom end of the limiting cylinder is closed, and a mounting seat is protruding on the bottom wall inside the limiting cylinder. A first mounting groove is opened on the top surface of the mounting seat, and a second mounting groove is opened on the bottom surface of the pressing rod. The elastic part is a compression spring, and both ends of the compression spring are respectively accommodated in the first mounting groove and the second mounting groove.

[0016] In order to prevent the pressing rod from detaching from the limiting cylinder, the limiting cylinder, the pressing rod and the elastic member form an integral assembly, a limiting boss is convexly provided on the outer peripheral wall of the top of the pressing rod, and a retaining ring is installed on the peripheral wall inside the limiting cylinder for limiting the upper limit position of the limiting boss.

[0017] In order to realize the transmission connection between the rotating block and the pressing rod, a transmission groove is opened on the periphery of the pressing rod, and the side of the rotating block has a transmission block extending into the limiting cylinder, and the transmission block can be movably accommodated in the transmission groove.

[0018] In order to ensure smooth switching between the unlocked and locked states, the surfaces corresponding to the stopper and the locking block are both arc surfaces, and the center of the arc surface is located on the rotation axis of the rotating block;

[0019] In the locked state, the stopper portion and the corresponding surfaces of the locking block are in contact;

[0020] In the unlocked state, the stopper and the corresponding surfaces of the locking block are away from each other.

[0021] In order to facilitate the rotational connection of the rotating block on the limiting cylinder, an installation opening is opened on the peripheral wall of the limiting cylinder, and a pin shaft arranged perpendicular to the axis of the limiting cylinder is provided in the installation opening. The rotating block is sleeved on the outer periphery of the pin shaft and can rotate around the axis of the pin shaft.

[0022] In order to improve stability, the number of the installation openings is at least two, and they are arranged at intervals along the circumference of the limiting cylinder, and the rotating blocks correspond one-to-one to the pin shafts in the installation openings.

[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 limit cylinder and a rotating block, and the impeller is installed in the volute through the locking assembly; the locking block on the rotating block can be limited to below the stop portion or disengaged from the limit 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 3 a longitudinal sectional view of the middle locking assembly;

[0032] Figure 6 for Figure 5 A longitudinal sectional view of the middle locking assembly after it is switched to an unlocked state;

[0033] Figure 7 for Figure 6 Longitudinal cross-sectional view of the middle limit tube after it is removed from the fixing seat. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] 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.

[0036] like Figures 1 to 7 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 .

[0037] The impeller 2 is installed in the volute 1 through a locking assembly 3 .

[0038] The locking assembly 3 includes a fixing seat 31 , a limiting cylinder 32 , a rotating block 33 , a pressing rod 34 and an elastic member 35 .

[0039] 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, and a ring-shaped stopper 3111 is convexly provided on the peripheral wall of the top of the mounting hole 311. The impeller 2 is sleeved on the outer periphery of the fixing seat 31 through the bearing 21.

[0040] 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. 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; three mounting openings 322 arranged at intervals along the circumferential direction are provided on the peripheral wall of the lower part of the limiting cylinder 32, and a pin 3221 arranged perpendicular to the axis of the limiting cylinder 32 is provided in each mounting opening 322; the bottom end of the limiting cylinder 32 is closed, and a mounting seat 323 is convexly provided on the bottom wall inside the limiting cylinder 32, and a first mounting groove 3231 is provided on the top surface of the mounting seat 323.

[0041] There are three rotating blocks 33, which correspond to the pins 3221 in the installation opening 322. Each rotating block 33 is sleeved on the outer periphery of the corresponding pin 3221 and can rotate around the axis of the pin 3221. The two sides of each rotating block 33 are respectively provided with a locking block 331 that can be exposed to the outer peripheral wall of the limiting cylinder 32 and a transmission block 332 that extends into the limiting cylinder 32. The locking block 331 can be lowered below the stopper 3111 when exposed to the outer peripheral wall of the limiting cylinder 32. In addition, the corresponding surfaces of the stopper 3111 and the locking block 331 are both arc surfaces, and the center of the arc surface is located on the rotation axis of the rotating block 33.

[0042] The pressing rod 34 is installed in the limiting cylinder 32. A transmission groove 341 extending in the circumferential direction is provided on the outer peripheral wall of the pressing rod 34, and the transmission block 33 can be movably accommodated in the transmission groove 341, so as to realize the transmission connection with the pressing rod 34; a second installation groove 342 is provided on the bottom surface of the pressing rod 34; and a limiting boss 343 is convexly provided on the outer peripheral wall of the top of the pressing rod 34.

[0043] The elastic member 35 is a compression spring, and the two ends of the compression spring are respectively accommodated in the first mounting groove 3231 and the second mounting groove 342, 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 limit position of the limiting boss 343 to move upward, 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.

[0044] The pressing rod 34 can drive the transmission block 332 to move up and down under the action of external force, thereby driving the rotating block 33 to rotate, so that the locking block 331 enters and exits the installation opening 322;

[0045] In the locked state, Figure 3 and Figure 5As shown, the pressing rod 34 rises to the limit state, the locking block 331 is exposed outside the installation opening 322 and is limited below the stopper 3111, and the corresponding surfaces of the stopper 3111 and the locking block 331 are in contact, 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;

[0046] In the unlocked state, Figure 6 As shown, the pressing rod 34 drops to the limit state, the locking block 331 is hidden in the installation opening 322 and disengaged from the limit of the stop portion 3111, and the corresponding surfaces of the stop portion 3111 and the locking block 331 are far away from each other. In this way, the limiting cylinder 32 can be removed from the fixing seat 31 along the axial direction to allow the limiting flange 321 to release the limit on the inner ring of the bearing 21.

[0047] 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.

[0048] The working principle of this embodiment is as follows:

[0049] (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 rotating block 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 6 As shown in FIG. 1 , 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 locking block 331 to flip downward through the transmission block 332, so that the locking block 331 is exposed outside the installation opening 322 and is limited to the bottom of the stopper 3111 to achieve locking (as shown in FIG. 1 ). Figure 3 and Figure 5 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;

[0050] (2) When disassembly is required, the pressing rod 34 is pressed inwardly to drive the locking block 331 to flip upward through the transmission block 332, so that the locking block 331 is hidden in the installation opening 322 and is out of the limit position of the stopper 3111 to achieve unlocking (such as Figure 6 As shown), at this time, the limiting cylinder 32 can be taken out from the fixing seat 31 along the axial direction (as shown in FIG. Figure 7As shown), the limiting flange 321 releases the limiting of the inner ring of the bearing 21, so that 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 stopper (3111) is convexly provided on a peripheral wall of 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 a lower portion accommodated in the mounting hole (311), and a peripheral portion having a limiting flange (321) for limiting the inner ring of the bearing (21); and A rotating block (33) is rotatably connected to the limiting cylinder (32), and has a locking block (331) on its side that can be limited to be located below the stopper (3111); In the locked state, the locking block (331) is limited to be located below the stop portion (3111), 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 limiting function of the stop portion (3111), 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) and is transmission-connected to the rotating block (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 bottom end of the limiting cylinder (32) is closed, and a mounting seat (323) is convexly provided on the bottom wall inside the limiting cylinder (32), and a first mounting groove (3231) is provided on the top surface of the mounting seat (323), and a second mounting groove (342) is provided on the bottom surface of the pressing rod (34), and the elastic member (35) is a compression spring, and the two ends of the compression spring are respectively accommodated in the first mounting groove (3231) and the second mounting groove (342).

5. The impeller mounting structure according to claim 3, characterized in that: A limiting boss (343) is convexly provided on the outer peripheral wall at the top of the pressing rod (34), and a retaining ring (324) for limiting the upper limit position of the limiting boss (343) is installed on the inner peripheral wall of the limiting cylinder (32).

6. The impeller mounting structure according to claim 2, characterized in that: A transmission groove (341) is formed on the periphery of the pressing rod (34), and a transmission block (332) is provided on the side of the rotating block (33) and extends into the limiting cylinder (32). The transmission block (332) can be movably accommodated in the transmission groove (341).

7. The impeller mounting structure according to claim 1, characterized in that: The corresponding surfaces of the stopper (3111) and the locking block (331) are both arc surfaces, and the center of the arc surface is located on the rotation axis of the rotating block (33); In the locked state, the corresponding surfaces of the stopper (3111) and the locking block (331) are in contact; In the unlocked state, the corresponding surfaces of the stopper (3111) and the locking block (331) are away from each other.

8. The impeller mounting structure according to claim 1, characterized in that: The peripheral wall of the limiting cylinder (32) is provided with an installation opening (322), and a pin shaft (3221) arranged perpendicular to the axis of the limiting cylinder (32) is arranged in the installation opening (322), and the rotating block (33) is sleeved on the outer periphery of the pin shaft (3221) and can rotate around the axis of the pin shaft (3221).

9. The impeller mounting structure according to claim 8, characterized in that: The number of the installation openings (322) is at least two, and they are arranged at intervals along the circumference of the limiting cylinder (32), and the rotating blocks (33) correspond one to one with the pin shafts (3221) in the installation openings (322).

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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