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 from the locking groove (3130) in the transverse groove (313) through the vertical groove (312) of the fixing base (31); and the elastic piece (34) 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 vertical groove extending downward from the top of the fixing seat and a horizontal groove connected to the bottom of the vertical groove are provided on the peripheral wall inside the mounting hole. At least a part of the horizontal groove is a locking groove. The impeller is arranged on the outer periphery of the fixing seat through a bearing sleeve;

[0009] A limiting cylinder extends along the axial direction of the mounting hole, the lower part of which is sleeved on the outer circumference of the fixing seat, and the circumference 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 of which has a locking block that can pass through the vertical groove and enter and exit the locking groove on the horizontal groove; and

[0011] An elastic member acts between the limiting cylinder and the pressing rod so that the limiting cylinder always has a tendency to press downward;

[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 prevent the locking block from easily detaching from the locking groove, the horizontal groove is wavy in shape, including at least two wave units connected end to end, each wave unit includes an ascending section and a descending section connected in sequence, the connection between the ascending section and the descending section of the odd-numbered wave units forms the locking groove, and the connection between the ascending section and the descending section of the even-numbered wave units is connected to the bottom end of the vertical groove.

[0015] In order to ensure that the locking assembly switches between the locked and unlocked states in sequence, the intersection point of the top wall of the preceding ascending section and the following descending section is located to the right of the intersection point of the bottom wall of the preceding ascending section and the following descending section, and the intersection point of the bottom wall of the preceding descending section and the following ascending section is located to the right of the intersection point of the top wall of the preceding descending section and the following ascending section.

[0016] To facilitate the installation of the elastic part, 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 elastic part 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.

[0017] 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 second limiting boss is installed on the inner peripheral wall of the limiting cylinder.

[0018] In order to improve stability, the number of the vertical grooves is at least two, and they are arranged at intervals along the circumference of the limiting cylinder, and the locking blocks correspond to the vertical grooves one by one.

[0019] In order to reduce the difficulty of processing, the limiting cylinder is coaxially arranged with the bearing.

[0020] 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.

[0021] The technical solution adopted by the utility model to solve the second technical problem is: a range hood with the impeller installation structure.

[0022] Compared with the prior art, the advantages of the utility model are: a locking assembly is composed of a fixed seat, a limit cylinder, a pressing rod and an elastic member, and the impeller is installed in the volute through the locking assembly, and the locking block on the pressing rod can enter and exit the locking groove on the horizontal groove through the vertical 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

[0023] 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;

[0024] Figure 2 for Figure 1 A longitudinal cross-sectional view of

[0025] Figure 3 for Figure 2 The enlarged view of part I;

[0026] Figure 4 for Figure 3 A three-dimensional exploded schematic diagram of the middle locking assembly;

[0027] Figure 5 for Figure 4 A plan view of the inner wall of the middle mounting hole;

[0028] Figure 6 for Figure 3 Schematic diagram of the switching process between the locking state and the unlocking state of the fixing seat and the pressing rod. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] 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.

[0031] like Figures 1 to 6 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 .

[0032] The impeller 2 is installed in the volute 1 through a locking assembly 3 .

[0033] The locking assembly 3 includes a fixing seat 31 , a limiting cylinder 32 , a pressing rod 33 and an elastic member 34 .

[0034] 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 peripheral wall inside the mounting hole 311 has a vertical groove 312 extending downward from the top of the fixing seat 31 and a horizontal groove 313 connected to the bottom end of the vertical groove 312. The impeller 2 is sleeved on the outer periphery of the fixing seat 31 through the bearing 21.

[0035] In this embodiment, Figure 5As shown, there are two vertical grooves 312, which are arranged at intervals along the circumference of the limiting cylinder 32; the horizontal groove 313 is wave-shaped, including four wave units connected end to end, each wave unit includes an ascending section 3131 and a descending section 3132 connected in sequence, and a locking groove 3130 is formed at the connection between the ascending section 3131 and the descending section 3132 of the odd-numbered wave units, and the connection between the ascending section 3131 and the descending section 3132 of the even-numbered wave units is connected to the bottom end of the vertical groove 312. In addition, the intersection of the top wall of the previous ascending section 3131 and the rear descending section 3132 is located on the right side of the intersection of the bottom wall of the previous ascending section 3131 and the rear descending section 3132, and the intersection of the bottom wall of the previous descending section 3132 and the rear ascending section 3131 is located on the right side of the intersection of the top wall of the previous descending section 3132 and the rear ascending section 3131. Thanks to the design of the staggered arrangement of the upper and lower concave and convex teeth of the transverse groove 313, the following locking block 331 slides from the highest point to the lowest point and then falls back to the highest point adjacent to it, and will not return to its original position, thereby preventing the locking block 331 from entering the bottom end of the descending section 3132 from the vertical groove 312 and then returning to the vertical groove 312 along the descending section 3132, so as to ensure that the locking assembly 3 switches between the locked and unlocked states in sequence.

[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 mounting hole 311. A locking block 331 corresponding to the vertical groove 312 is convexly provided on the outer peripheral wall of the lower part of the pressing rod 33, and the locking block 331 can pass through the vertical groove 312 and enter and exit the locking groove 3130 on the horizontal groove 313; a second limiting boss 332 is convexly provided on the outer peripheral wall of the top of the pressing rod 33.

[0038] The elastic member 34 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 tendency to press down. 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 elastic member 34 constitute an integral component.

[0039] The pressing rod 33 can be inserted into the mounting hole 311 under the action of external force. During this process, the locking block 331 can pass through the vertical slot 312 and enter and exit the locking slot 3130 on the horizontal slot 313.

[0040] In the locked state, the locking block 331 is inserted into the locking groove 3130, and the inner ring of the bearing 21 is limited between the limiting flange 321 and the volute 1;

[0041] In the unlocked state, the locking block 331 is disengaged from the locking groove 3130 , and the limiting flange 321 releases the limiting function on the inner ring of the bearing 21 .

[0042] 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.

[0043] The working principle of this embodiment is as follows:

[0044] (1) When installation is required, first, the impeller 2 is sleeved on the outer periphery of the fixing seat 31 through the bearing 21, then the limiting cylinder 32, the pressing rod 33 and the elastic member 34 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 vertical groove 312 and inserted, so that the locking block 331 moves to the bottom of the vertical groove 312 (such as Figure 6 a) and then move downward along the descending section 3132 located on the right side of the vertical slot 312 until the locking block 331 is inserted into place (as shown in FIG. Figure 6 b, after the locking block 331 moves to the bottom of the descending section 3132), the pressing rod 33 is released, and the pressing rod 33 extends outward under the elastic force of the elastic member 34, so that the locking block 331 moves up along the ascending section 3131 located on the right side of the descending section 3132 and enters the locking groove 3130 to achieve locking (as shown in FIG. Figure 6 c), at this time, Figure 3 As shown, under the elastic force of the elastic member 34, 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;

[0045] (2) When disassembly is required, the pressing rod 33 is simply pressed inwardly to move the locking block 331 downward along the descending section 3132 located on the right side of the locking groove 3130 until the locking block 331 is inserted into place (e.g. Figure 6 d, the locking block 331 moves to the bottom of the descending section 3132) and then the pressing rod 33 is released. The pressing rod 33 extends outward under the elastic force of the elastic member 34, so that the locking block 331 moves up along the ascending section 3131 located on the right side of the descending section 3132 and then enters the vertical groove 312 (as shown in FIG. Figure 6a) and continue to move upward along the vertical groove 313 to disengage from the fixing seat 31 to achieve unlocking. At this time, the limiting cylinder 32 can be removed from the fixing seat 31 so that the limiting flange 321 releases the limiting of the inner ring of the bearing 21. In this way, the impeller 2 can be removed from the fixing seat 31 to complete the disassembly of the impeller 2.

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 vertical groove (312) extending downward from the top of the fixing seat (31) and a horizontal groove (313) connected to the bottom of the vertical groove (312) are provided on the peripheral wall inside the mounting hole (311). At least a part of the horizontal groove (313) is a locking groove (3130). The impeller (2) is sleeved on the outer periphery of the fixing seat (31) through 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 has a locking block (331) that can pass through the vertical groove (312) and enter and exit the locking groove (3130) on the horizontal groove (313); and An elastic member (34) 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 (3130), 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 (3130), 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 transverse groove (313) is wave-shaped and includes at least two wave units connected end to end, each wave unit includes an ascending section (3131) and a descending section (3132) connected in sequence, the connection between the ascending section (3131) and the descending section (3132) of the odd-numbered wave units forms the locking groove (3130), and the connection between the ascending section (3131) and the descending section (3132) of the even-numbered wave units is connected to the bottom end of the vertical groove (312).

3. The impeller mounting structure according to claim 2, characterized in that: The intersection point of the top walls of the preceding ascending section (3131) and the succeeding descending section (3132) is located on the right side of the intersection point of the bottom walls of the preceding ascending section (3131) and the succeeding descending section (3132), and the intersection point of the bottom walls of the preceding descending section (3132) and the succeeding ascending section (3131) is located on the right side of the intersection point of the top walls of the preceding descending section (3132) and the succeeding ascending section (3131).

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 elastic member (34) 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 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: The number of the vertical grooves (312) is at least two, and they are arranged at intervals along the circumference of the limiting cylinder (32), and the locking blocks (331) correspond to the vertical grooves (312) one by one.

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

8. The impeller mounting structure according to any one of claims 1 to 7, 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.

9. A range hood using the impeller mounting structure according to any one of claims 1 to 8.

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