CN219221009U

CN219221009U - Locknut, fan system and range hood

Info

Publication number: CN219221009U
Application number: CN202320194806.3U
Authority: CN
Inventors: 杨利杰; 梁雪斐
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2023-01-19
Filing date: 2023-01-19
Publication date: 2023-06-20
Anticipated expiration: 2033-01-19

Abstract

The utility model discloses a locknut, a fan system and a range hood, wherein the locknut comprises a hollow nut structure and a gasket, the nut structure comprises a first nut part and a second nut part which are arranged along the axial direction of the locknut, and a coil spring is arranged in the first nut part; the method is characterized in that: the second nut portion passes through the washer such that a portion of the second nut portion is located on a side of the washer remote from the first nut portion, and the nut structure is formed with an internal thread at least on an inner periphery of the second nut portion. Compared with the prior art, the utility model has the advantages that: through making partial nut structure pass the gasket, make it can enter into in one of them fixed part, and then the effective screw thread cooperation section of extension to need not to increase the height of the outer locknut of gasket, can realize stable fastening effect, enlarged application range, be particularly useful for the fastening installation in the narrow and small space.

Description

Locknut, fan system and range hood

Technical Field

The utility model relates to a fastener, in particular to a locknut, a fan system applying the locknut and a range hood applying the fan system.

Background

Locknuts are widely used in applications where a secure connection is required and for locking. An existing locknut, such as the one disclosed in chinese patent application No. 201010513019.8, comprises: a hexagonal nut part having a screw hole which is coupled to the screw shaft at the center; the circular nut part is connected with the hexagonal nut part, the inner diameter of the concave part of the circular nut part is larger than that of the spiral hole, the concave part is provided with a winding part with a section surface, and one side of the lower end of the circular nut part is provided with a guide long hole connected with the concave part; the coil spring comprises a coil part with fastening force in a circular nut part concave part, an upper end coil part which is wound on the coil part by a winding part and is fixed on a section surface, and a bending end part which is bent outwards at the lower end point of the coil part and penetrates through a guide long hole.

The locknut has both hexagonal threaded end and spring lockend, which results in high overall height of the nut. When the nut is applied to a fan system of a range hood (used for fixing a motor and an impeller), the effective screw thread matching end of the range hood structure is insufficient in length, and an inner hole with the inner diameter larger than the opposite side of the nut is formed in the matching position of the range hood impeller and the nut, so that the effect of fixing the impeller cannot be achieved when the nut is directly assembled on a motor shaft.

Disclosure of Invention

The first technical problem to be solved by the utility model is to provide a locknut, which aims at overcoming the defects of the prior art, prolongs the effective threaded matching section and realizes a stable fastening effect.

The second technical problem to be solved by the utility model is to provide a fan system with the locknut.

The third technical problem to be solved by the utility model is to provide a range hood with the fan system.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a locknut comprising a hollow nut structure and a washer, the nut structure comprising a first nut portion and a second nut portion arranged in an axial direction of the locknut, the first nut portion having a coil spring disposed therein; the method is characterized in that: the second nut portion passes through the washer such that a portion of the second nut portion is located on a side of the washer remote from the first nut portion, and the nut structure is formed with an internal thread at least on an inner periphery of the second nut portion.

Because current locknut, the gasket need butt at fixed part tip, therefore, effective complex screw thread section only can be the outer nut structure part of gasket, and through making partial nut structure pass the gasket, make it can enter into in one of them fixed part, and then lengthen effective screw thread cooperation section to need not to increase the outer locknut's of gasket height, can realize stable fastening effect, enlarged application range, be particularly useful for the fastening installation in the narrow and small space.

According to one aspect of the utility model, the washer is provided with a perforation in the middle, the perforation being dimensioned to fit with a second nut portion, the second nut portion and washer being assembled together by bulging.

According to another aspect of the utility model, the second nut portion and the washer are stamped as a unitary structure.

For the convenience of grabbing and assembling, the gasket is hexagonal.

In order to facilitate positioning of the coil spring, a first notch and a second notch are formed on the peripheral wall of the first nut part, the first notch is located at a position where the first nut part is far away from the second nut part, and the second notch is located at a position where the first nut part is close to the second nut part; the coil spring has a first end portion extending from the first notch out of the first nut portion and a second end portion extending from the second notch out of the first nut portion.

In order to further position the coil spring, a limit groove is formed in the first nut part at a position far away from the second nut part, and the limit groove is formed by outwards sinking the inner peripheral wall of the first nut part; the first notch is communicated with the limiting groove, and the coil spring is embedded into the limiting groove at least at a part adjacent to the first end part.

The utility model solves the second technical problem by adopting the technical proposal that: a fan system comprises an impeller and a motor for driving the impeller to rotate, wherein the impeller comprises a wheel disc, and the motor comprises a motor body and a motor shaft serving as an output end of the motor; the method is characterized in that: the wheel disc and the motor shaft are fixed through the locknut, and the end part of the motor shaft matched with the locknut is provided with external threads.

Further, the wheel disc comprises a hollow shaft sleeve extending in the same direction as the motor shaft, the motor body and the locknut are located at two opposite sides of the shaft sleeve along the axial direction of the impeller, the gasket is abutted to the end part of the shaft sleeve, which is far away from the motor body, the second nut part extends into the shaft sleeve, and the motor shaft passes through the shaft sleeve and then enters the nut structure.

The technical scheme adopted by the utility model for solving the third technical problem is as follows: a range hood, characterized in that: a fan system as described above is applied.

Compared with the prior art, the utility model has the advantages that: through making partial nut structure pass the gasket, make it can enter into in one of them fixed part, and then the effective screw thread cooperation section of extension to need not to increase the height of the outer locknut of gasket, can realize stable fastening effect, enlarged application range, be particularly useful for the fastening installation in the narrow and small space.

Drawings

FIG. 1 is a schematic diagram of a fan system according to a first embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a fan system according to a first embodiment of the present utility model;

FIG. 3 is an enlarged partial schematic view of FIG. 2;

FIG. 4 is a schematic view of a locknut of a fan system according to a first embodiment of the present utility model;

FIG. 5 is a schematic view of a locknut of a fan system (from a different perspective than FIG. 4) according to a first embodiment of the present utility model;

FIG. 6 is an exploded view of a locknut of a fan system according to a first embodiment of the present utility model;

fig. 7 is a schematic view of a locknut of a fan system according to a second embodiment of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Example 1

Referring to fig. 1-6, a fan system is mainly used for a range hood, and can also be used for other occasions needing similar power devices.

The fan system comprises a volute 1, an impeller 2 arranged in the volute 1 and a motor 3 for driving the impeller 2 to rotate, wherein the impeller 2 comprises a wheel disc 21, and the motor 3 comprises a motor body 31 and a motor shaft 32 serving as an output end of the motor 3. The wheel 21 includes a sleeve 211 extending in the same direction as the motor shaft 32, and the sleeve 211 has a hollow structure, and the motor shaft 32 passes through the sleeve 211 and is fixed to the wheel 21.

The wheel disc 21 and the motor shaft 32 are fixed by the locknut 4, and the locknut 4 includes a hollow nut structure including a first nut portion 41 and a second nut portion 42 integrally formed with female threads formed at least on an inner periphery of the second nut portion 42, the first nut portion 41 and the second nut portion 42 being disposed in an axial direction of the locknut 4. Wherein the first nut portion 41 is preferably at least partially hexagonally shaped to facilitate gripping during assembly and disassembly. The coil spring 43 is disposed inside the first nut portion 41, and in order to facilitate positioning of the locking spring 43, a limiting slot 411 may be formed in the first nut portion 41 at a position far from the second nut portion 42, the limiting slot 411 may be formed by an outward depression of an inner peripheral wall of the first nut portion 41, and the limiting slot 411 is preferably an annular slot. The end of the motor shaft 32 that mates with the locknut 4 is formed with external threads.

A first notch 412 and a second notch 413 are formed in the peripheral wall of the first nut portion 41, wherein the first notch 412 is located at a position where the first nut portion 41 is away from the second nut portion 42 and is communicated with the limit slot 411, and the second notch 413 is located at a position where the first nut portion 41 is close to the second nut portion 42. The coil spring 43 has a first end 431 and a second end 432, the first end 431 extends out of the first nut portion 41 from the first notch 412, the coil spring 43 is fitted into the limit slot 411 at least at a portion adjacent to the first end 431, and preferably, the coil spring 43 is nearly filled in the limit slot 411; the second end portion 432 extends from the second notch 413 to the outside of the first nut portion 41, whereby the coil spring 43 is fixed relative to the position (particularly, in the axial direction) of the first nut portion 41. The principle of the structure is same as the prior art.

The second nut portion 42 is cylindrical in shape and has an outer diameter smaller than the first nut portion 41. The locknut 4 further comprises a washer 44, the washer 44 being circular, with a through hole 441 provided in the middle, the through hole 441 being sized to fit the second nut portion 42, the second nut portion 42 and the washer 44 being assembled together by bulging. The second nut portion 42 passes through the spacer 44 so as to be partially located on a side of the spacer 44 remote from the first nut portion 41.

During installation, the gasket 44 is abutted against the end part of the shaft sleeve 211 far away from the motor body 31, the second nut part 42 extends into the shaft sleeve 211, and the motor shaft 32 passes through the shaft sleeve 211 and then enters the second nut part 42 and the first nut part 41, so that the cavity in the shaft sleeve 211 is effectively utilized, the locknut 4 can be increased by utilizing the effective thread section on the motor shaft 32 (in the prior art, the locknut 4 can only be completely positioned outside the wheel disc 21, and the matched part can only be the part of the motor shaft 32 extending out of the wheel disc 21), so that the application of the locknut 4 on a range hood product is realized under the condition that the motor shaft 32 is not increased, and the interchangeability universality of the locknut 4 and the original hand-tightening nut is enhanced.

Example two

Referring to fig. 7, in the present embodiment, the difference from the first embodiment described above is that the washer 44 and the second nut portion 42 are integrally formed, and are formed by punching together, and the washer 44 is also hexagonal in shape for easy gripping and assembly.

Claims

1. A locknut comprising a hollow nut structure and a washer (44), the nut structure comprising a first nut portion (41) and a second nut portion (42) arranged in an axial direction of the locknut, the first nut portion (41) having a coil spring (43) disposed therein; the method is characterized in that: the second nut portion (42) passes through the washer (44) such that a portion of the second nut portion (42) is located on a side of the washer (44) remote from the first nut portion (41), and the nut structure is formed with an internal thread at least on an inner periphery of the second nut portion (42).

2. A locknut as defined in claim 1, wherein: a through hole (441) is formed in the middle of the gasket (44), the size of the through hole (441) is matched with that of the second nut part (42), and the second nut part (42) and the gasket (44) are assembled together through bulging.

3. A locknut as defined in claim 1, wherein: the second nut portion (42) and the washer (44) are stamped as a unitary structure.

4. A locknut as claimed in any one of claims 1 to 3, wherein: the gasket (44) has a hexagonal shape.

5. A locknut as claimed in any one of claims 1 to 3, wherein: a first notch (412) and a second notch (413) are formed on the peripheral wall of the first nut part (41), the first notch (412) is located at a position where the first nut part (41) is far away from the second nut part (42), and the second notch (413) is located at a position where the first nut part (41) is close to the second nut part (42); the coil spring (43) has a first end (431) and a second end (432), the first end (431) extending from the first notch (412) out of the first nut portion (41), and the second end (432) extending from the second notch (413) out of the first nut portion (41).

6. A locknut as defined in claim 5, wherein: a limiting groove (411) is formed in the position, far away from the second nut part (42), in the first nut part (41), and the limiting groove (411) is formed by outwards sinking the inner peripheral wall of the first nut part (41); the first notch (412) is communicated with the limit groove (411), and the coil spring (43) is embedded in the limit groove (411) at least at a part adjacent to the first end (431).

7. A fan system comprising an impeller (2) and a motor (3) for driving the impeller (2) to rotate, the impeller (2) comprising a wheel disc (21), the motor (3) comprising a motor body (31) and a motor shaft (32) as an output of the motor (3); the method is characterized in that: the wheel disc (21) and the motor shaft (32) are fixed by the locknut as claimed in any one of claims 1 to 6, and the end of the motor shaft (32) matched with the locknut is provided with external threads.

8. The blower system of claim 7, wherein: the wheel disc (21) comprises a hollow shaft sleeve (211) extending in the same direction as a motor shaft (32), the motor body (31) and locknuts are located on two opposite sides of the shaft sleeve (211) along the axial direction of the impeller (2), the gasket (44) is abutted against the end part, far away from the motor body (31), of the shaft sleeve (211), the second nut part (42) extends into the shaft sleeve (211) partially, and the motor shaft (32) penetrates through the shaft sleeve (211) and then enters the nut structure.

9. A range hood, characterized in that: use of a fan system according to claim 7 or 8.