Shaft sleeve limiting structure and ceiling fan

Abstract

The shaft sleeve limiting structure comprises a shell, a shaft sleeve and a rotating shaft, the shell is provided with an installation channel, the installation channel is provided with a supporting part, the supporting part and the shell are integrally formed, the bottom wall of the shaft sleeve abuts against the supporting part, installation limiting of the shaft sleeve on the shell can be achieved, and falling off can be avoided. And moreover, interference fit is not needed, so that the production efficiency is favorably improved. The rotating shaft is pivotally connected in the shaft sleeve and provided with a limiting piece, the limiting piece abuts against the end face of the other end, away from the supporting part, of the shaft sleeve, limiting of the rotating shaft in the shaft sleeve is achieved, and the mounting stability of the rotating shaft is improved. The ceiling fan further comprises a rotor and a stator, the stator is fixedly installed on the connecting pipe, and the rotor is installed on the installation base.

Description

Technical Field

[0001] The utility model relates to the technical field of ceiling fans, in particular to a shaft sleeve limiting structure and a ceiling fan. Background Art

[0002] Small household portable ceiling fans are used for indoor cooling and have the advantages of being lightweight, easy to install, and easy to store. To achieve this, current portable ceiling fans mostly adopt a relatively simple design. The sleeve that mates with the rotating shaft is fixed to the body only by an interference fit. The body shell is made of plastic, which is prone to deformation after aging. Thermal deformation caused by heat accumulation due to long-term operation can cause the connection between the sleeve and the body to loosen, and the sleeve and rotating shaft are at risk of slipping off the body, which can easily cause personal injury due to falling fan blades. On the other hand, the interference fit between the sleeve and the shell makes installation difficult, resulting in insufficient production efficiency. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a shaft sleeve limiting structure and a ceiling fan, which can improve the installation stability of the shaft sleeve, prevent it from slipping, and improve production efficiency.

[0004] According to an embodiment of the first aspect of the present invention, a shaft sleeve limiting structure includes:

[0005] The housing is provided with a mounting channel, the mounting channel has a support portion, and the support portion is integrally formed with the housing;

[0006] A shaft sleeve is inserted into the installation channel, and a bottom wall of the shaft sleeve abuts against the support portion;

[0007] The rotating shaft is pivotally connected in the shaft sleeve. A limiting piece is provided on the rotating shaft. The limiting piece abuts against the end surface of the other end of the shaft sleeve away from the support part to realize the limiting of the rotating shaft in the shaft sleeve.

[0008] According to an embodiment of the first aspect of the present invention, a shaft sleeve limiting structure has at least the following beneficial effects: This embodiment comprises a housing, a shaft sleeve, and a rotating shaft, wherein the housing is provided with an installation channel, the installation channel having a support portion, the support portion being integrally formed with the housing, the bottom wall of the shaft sleeve abutting the support portion, thereby enabling the shaft sleeve to be installed and limited on the housing, thereby preventing it from falling off and personal injury, and without requiring an interference fit, thereby facilitating improved production efficiency. The rotating shaft is pivotally connected within the shaft sleeve, and a limiting plate is provided on the shaft, which abuts the end face of the shaft sleeve opposite the support portion, thereby limiting the position of the rotating shaft within the shaft sleeve and improving the installation stability of the rotating shaft.

[0009] According to an embodiment of the first aspect of the present invention, a mounting surface surrounding the shaft sleeve is provided in the mounting channel, and the mounting surface abuts against the outer peripheral wall of the shaft sleeve.

[0010] According to an embodiment of the first aspect of the present invention, the supporting portion has a supporting surface, and the supporting surface abuts against the bottom wall of the sleeve.

[0011] According to an embodiment of the first aspect of the present invention, the support portion has a connecting hole, and the rotating shaft passes through the connecting hole and is pivotally connected to the shaft sleeve.

[0012] According to an embodiment of the first aspect of the present invention, the shaft sleeve is provided with a matching hole, and the inner peripheral wall of the matching hole abuts against the outer peripheral wall of the rotating shaft.

[0013] According to an embodiment of the first aspect of the present invention, a radius difference between the connecting hole and the rotating shaft is smaller than half of a difference between a radius of the outer peripheral wall of the sleeve and a radius of the fitting hole.

[0014] According to an embodiment of the first aspect of the present utility model, a washer is provided between the limiting piece and the rotating shaft, and the inner peripheral wall of the washer abuts against the outer peripheral wall of the rotating shaft.

[0015] According to an embodiment of the first aspect of the present invention, a mounting seat is connected to the rotating shaft, and the mounting seat has a connecting portion, which extends toward the housing, and the rotating shaft is inserted into the connecting portion.

[0016] According to an embodiment of the first aspect of the present utility model, a connecting pipe is provided on the shell, and the connecting pipe extends downward from the bottom wall of the shell, and the connecting pipe has a mounting channel.

[0017] According to an embodiment of the second aspect of the present invention, a ceiling fan is provided, comprising the above-mentioned shaft sleeve limiting structure, and further comprising a rotor and a stator, wherein the stator is fixedly mounted on the connecting pipe, and the rotor is mounted on the mounting seat.

[0018] The ceiling fan according to the second embodiment of the present invention has at least the following beneficial effects:

[0019] Compared with the existing technology, the ceiling fan has a sleeve limiting structure that sets a support part on the outer shell. The support part is integrally formed with the shell, and the bottom wall of the sleeve abuts the support part, which can realize the installation limit of the sleeve on the shell, avoid falling off, avoid personal injury, and do not require interference fit, which is conducive to improving production efficiency.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a cross-sectional view of a shaft sleeve limiting structure in an embodiment of the first aspect of the present utility model;

[0023] Figure 2 for Figure 1 A magnified view of center A;

[0024] Figure 3 for Figure 1 Magnified view of middle B;

[0025] Figure 4 This is a cross-sectional view of the connecting pipe in the embodiment of the first aspect of the present utility model.

[0026] Reference numerals:

[0027] Housing 100; connecting pipe 101; mounting channel 102; support portion 103; supporting surface 104; mounting surface 105; connecting hole 106; rotor 107; stator 108;

[0028] A shaft sleeve 110 ; a rotating shaft 111 ; a matching hole 112 ; a washer 113 ; a mounting seat 114 ; a connecting portion 115 ; and a limiting piece 116 . DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figure 1 and Figure 2 In the embodiment of the first aspect of the present utility model, a sleeve limiting structure includes a shell 100, a sleeve 110 and a rotating shaft 111. The shell 100 is provided with a mounting channel 102. The mounting channel 102 has a support portion 103. The support portion 103 is integrally formed with the shell 100. It can be understood that the shell 100 is formed by injection molding or aluminum casting. The shell 100 is provided with a connecting tube 101. The connecting tube 101 extends downward from the bottom wall of the shell 100, and the mounting channel 102 is located in the connecting tube 101. The bottom wall of the sleeve 110 abuts the support portion 103, and the support portion 103 extends from the inner wall of the connecting tube 101 along the radial direction of the sleeve 110, which can realize the installation limitation of the sleeve 110 on the shell 100, can avoid falling off, avoid personal injury, and does not require interference fit, which is conducive to improving production efficiency. The rotating shaft 111 is pivotally connected to the shaft sleeve 110. A limiting plate 116 is provided on the rotating shaft 111. The limiting plate 116 abuts against the end surface of the other end of the shaft sleeve 110 away from the support part 103, thereby limiting the rotating shaft 111 in the shaft sleeve 110, preventing the rotating shaft 111 from falling down, and improving the installation stability of the rotating shaft 111.

[0034] Specifically, refer to Figure 4 A mounting surface 105 surrounding the shaft sleeve 110 is provided in the mounting channel 102. The mounting surface 105 contacts the outer peripheral wall of the shaft sleeve 110, thereby limiting the position of the shaft sleeve 110. In this embodiment, the shaft sleeve 110 is prevented from colliding with the mounting channel 102 through a transition fit or a clearance fit, which can reduce the difficulty of installation and improve the efficiency of production and assembly.

[0035] Reference Figure 3 It is understood that the support portion 103 has a support surface 104, which is parallel to the bottom wall of the sleeve 110 and contacts the bottom wall of the sleeve 110. Furthermore, the support portion 103 has a connecting hole 106, through which the rotating shaft 111 passes and is pivotally connected to the sleeve 110. It is understood that there is a gap between the connecting hole 106 and the rotating shaft 111, and the gap extends around the circumference of the rotating shaft 111. At the same time, the sleeve 110 is provided with a matching hole 112. When the matching hole 112 is connected to the sleeve 110, the inner circumferential wall of the matching hole 112 contacts the outer circumferential wall of the rotating shaft 111. It is understood that the matching hole 112 and the rotating shaft 111 are clearance-fitted, that is, there is a gap between the outer circumferential wall of the rotating shaft 111 and the hole wall of the matching hole 112. This allows the rotating shaft 111 to rotate smoothly.

[0036] It is understood that the difference in radius between the connecting hole 106 and the rotating shaft 111 is less than half of the difference in radius between the outer peripheral wall of the sleeve 110 and the matching hole 112. Figure 3The difference in radius between the connecting hole 106 and the rotating shaft 111 is the gap between the connecting hole 106 and the rotating shaft 111, and the length of the gap along the radial direction of the rotating shaft 111 is L1. Half of the difference between the radius of the outer peripheral wall of the sleeve 110 and the radius of the matching hole 112 is the length L2 of the support portion 103 extending outward from the tube wall of the connecting tube 101 along the radial direction of the rotating shaft 111. In this embodiment, L1<L2. It can be understood that when L1<L2, it can ensure that the length of the support portion 103 extending outward from the tube wall of the connecting tube 101 along the radial direction of the rotating shaft 111 is greater than half the thickness of the sleeve 110, thereby ensuring that the support surface 104 effectively contacts the bottom wall of the sleeve 110, thereby ensuring the installation stability of the sleeve 110 and preventing the sleeve 110 from slipping.

[0037] Reference Figure 3 It can be understood that a washer 113 is provided between the limiting piece 116 and the rotating shaft 111, and the inner peripheral wall of the washer 113 contacts the outer peripheral wall of the rotating shaft 111, thereby preventing the washer 113 from shaking when the rotating shaft 111 rotates. In this embodiment, the washer 113 adopts an O-ring with an O-shaped cross-section. In actual use, due to the action of gravity, the washer 113 is pressed against the upper end surface of the sleeve 110. The use of the washer 113 with an O-shaped cross-section can reduce the contact area between the washer 113 and the upper end surface of the sleeve 110, thereby reducing the rotation resistance. At the same time, the washer 113 is made of a plastic material with lubricating properties, such as POM material, which is conducive to reducing the rotation resistance, and the POM material has good hardness, which can reduce the shaking of the rotating shaft 111 along its axial direction. Furthermore, a washer 113 is provided on the end of the rotating shaft 111 facing away from the limiting piece 116. The washer 113 is located within the connecting hole 106, and the outer peripheral wall of the washer 113 in the radial direction of the rotating shaft 111 does not contact the inner wall of the connecting hole 106. Furthermore, the upper wall surface of the washer 113 located within the connecting hole 106 abuts against the bottom wall of the shaft sleeve 110.

[0038] Furthermore, a mounting base 114 is connected to the rotating shaft 111, and the mounting base 114 is used to mount the fan blades. The mounting base 114 has a connecting portion 115, and the connecting portion 115 extends toward the direction of the housing 100, and the rotating shaft 111 is inserted into the connecting portion 115. It is understandable that the outer diameter of the connecting portion 115 is not less than the maximum outer diameter of the washer 113 located in the connecting hole 106, and the washer 113 is located between the bottom wall of the sleeve 110 and the upper end face of the connecting portion 115, which can prevent the connecting portion 115 from hitting the sleeve 110 when the rotating shaft 111 moves axially, causing abnormal noise or even malfunction, which is conducive to ensuring operational stability.

[0039] In an embodiment of the second aspect of the present invention, a ceiling fan is provided, comprising the aforementioned shaft sleeve retaining structure. It is understood that the fan further comprises a rotor 107 and a stator 108, wherein the stator 108 is fixedly mounted on the connecting tube 101, and the rotor 107 is mounted on a mounting base 114. The stator 108 is fixed to the outer circumferential wall of the connecting tube 101 through an interference fit, and the rotor 107 is wrapped around the outer circumference of the stator 108. The mounting base 114 and the rotor 107 rotate about the rotation axis of the rotating shaft 111 to achieve power output.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A shaft sleeve limiting structure, characterized in that: include: The housing is provided with a mounting channel, the mounting channel having a support portion, and the support portion is integrally formed with the housing; a shaft sleeve, inserted into the installation channel, with a bottom wall of the shaft sleeve abutting against the support portion; The rotating shaft is pivotally connected in the shaft sleeve. A limiting piece is provided on the rotating shaft. The limiting piece abuts against the end surface of the other end of the shaft sleeve away from the supporting portion to limit the rotating shaft in the shaft sleeve.

2. A shaft sleeve limiting structure according to claim 1, characterized in that: A mounting surface surrounding the shaft sleeve is provided in the mounting channel, and the mounting surface contacts the outer peripheral wall of the shaft sleeve.

3. The shaft sleeve limiting structure according to claim 1, characterized in that: The supporting portion has a supporting surface, and the supporting surface abuts against the bottom wall of the sleeve.

4. The shaft sleeve limiting structure according to claim 1, characterized in that: The supporting portion has a connecting hole, and the rotating shaft passes through the connecting hole and is pivotally connected to the shaft sleeve.

5. The shaft sleeve limiting structure according to claim 4, characterized in that: The shaft sleeve is provided with a matching hole, and the inner peripheral wall of the matching hole abuts against the outer peripheral wall of the rotating shaft.

6. The shaft sleeve limiting structure according to claim 5, characterized in that: The difference in radius between the connecting hole and the rotating shaft is smaller than half of the difference between the radius of the outer peripheral wall of the sleeve and the radius of the matching hole.

7. The shaft sleeve limiting structure according to claim 1, characterized in that: A washer is provided between the limiting piece and the rotating shaft, and the inner peripheral wall of the washer abuts against the outer peripheral wall of the rotating shaft.

8. The shaft sleeve limiting structure according to claim 1, characterized in that: The rotating shaft is connected to a mounting seat, and the mounting seat has a connecting portion. The connecting portion extends toward the housing, and the rotating shaft is inserted into the connecting portion.

9. The shaft sleeve limiting structure according to claim 1, characterized in that: The shell is provided with a connecting pipe, which extends downward from the bottom wall of the shell and has the installation channel.

10. A ceiling fan, characterized in that The shaft sleeve limiting structure comprises a shaft sleeve limiting structure according to any one of claims 1 to 9, wherein the shaft sleeve limiting structure comprises a connecting pipe and a mounting seat, and includes: The rotor and the stator are fixedly mounted on the connecting pipe, and the rotor is mounted on the mounting seat.

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