Fan structure capable of being quickly disassembled

Abstract

A fan structure capable of being quickly disassembled, comprising a base. A mounting rod is provided on the base, a machine unit being provided on the mounting rod; a rear guard is mounted on the front side of the machine unit, and a front guard is mounted on the front side of the rear guard, fan blades being provided between the rear guard and the front guard; a motor is provided in the machine unit; a plurality of fitting parts in a circumferential array are provided on the front wall surface of the machine unit, an opening being formed in a side of each fitting part to form a fitting slot; a plurality of fitting members in a circumferential array are provided on the rear wall surface of the rear guard and fit the fitting slots; a first annular positioning part is provided on the front wall surface of the machine unit, and a second annular positioning part fitting the first annular positioning part is provided on the rear wall surface of the rear guard, the first annular positioning part and the second annular positioning part being attached to each other and being rotatable with respect to each other; the fan blades are fixedly connected to a rotating shaft, and a bearing is mounted on the rear guard, the rotating shaft being inserted into an inner race of the bearing to form an interference fit; a first driving coupler is mounted at the rear end of the rotating shaft, a second driving coupler coupled to the first driving coupler being mounted on a motor shaft of the motor.

Description

A quickly detachable fan structure Technical Field

[0001] The utility model relates to a quickly detachable fan structure. Background Art

[0002] Prior art, such as Chinese utility model patent publication number CN206246393U, discloses a fan cover and head connection structure and a fan utilizing the connection structure. The fan cover and head connection structure includes a fan cover and a head, wherein the fan cover includes a front cover mesh and a rear cover mesh connected to each other. One of the rear cover mesh and the head is provided with a mounting shaft, and the other is provided with a mounting hole, wherein the mounting shaft is threadedly connected to the mounting hole. The rear cover mesh of the fan incorporating the present invention is easy to install and securely connects to the head without requiring additional parts, resulting in stable and reliable installation.

[0003] Based on the above, in the prior art, the fan cover is mounted on the machine head using a threaded connection. While this mounting structure facilitates disassembly, the disadvantage of threaded connections is that after tightening, a considerable amount of external force is required to loosen and disassemble, which is sometimes not user-friendly for users with limited strength. Threaded connections also have the problem of thread slippage, making installation impossible, and loosening due to shaking or insufficient tightening.

[0004] Furthermore, in existing technology, the fan blades are directly plugged into the front end of the motor shaft using an interference fit, while the motor is fixedly mounted inside the machine head. This arrangement requires the user to first remove the front cover, then the fan blades, and finally the rear cover from the machine head during disassembly. This structure does not require the entire front cover, fan blades, and rear cover to be removed from the machine head; instead, they must be removed one by one, which requires further improvement. Technical Solutions

[0005] Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems in the prior art. To this end, the utility model proposes a quickly detachable fan structure.

[0007] A quickly detachable fan structure designed for this purpose includes a base, a mounting rod is provided on the base, a head is provided on the mounting rod, a rear cover is installed on the front side of the head, a front cover is installed on the front side of the rear cover, fan blades are provided between the rear cover and the front cover, a motor is provided in the head, a plurality of hooks are provided along a circumferential array on the front wall of the head, a slot with an open side is formed in the hook, and a plurality of clips that engage with the slots are provided along a circumferential array on the rear wall of the rear cover;

[0008] A first annular positioning portion is provided on the front wall of the machine head, and a second annular positioning portion is provided on the rear wall of the rear cover to match the first annular positioning portion. The first annular positioning portion and the second annular positioning portion are in contact with each other and can rotate relative to each other.

[0009] The fan blades are fixedly connected to a rotating shaft, a bearing is installed on the rear cover, the rotating shaft is interference fit in the inner ring of the bearing, a first transmission coupler is detachably installed on the rear end of the rotating shaft, a second transmission coupler is installed on the motor shaft of the motor, and the second transmission coupler is coupled to the first transmission coupler for transmission. Beneficial effects

[0010] The present invention has the advantages of simple and reasonable structure, snap-fit ​​fixation to avoid thread slippage and shaking, and the overall disassembly of the front cover, fan blades and rear cover is possible. Compared with the existing technology, it includes a head and a rear cover, and a plurality of hooks are arranged in a circumferential array on the front wall of the head, and a slot with an opening on one side is formed in the hook, and a plurality of clips that snap into engagement with the slot are arranged in a circumferential array on the rear wall of the rear cover; a first annular positioning portion is provided on the front wall of the head, and a second annular positioning portion that matches the first annular positioning portion is provided on the rear wall of the rear cover, and the first annular positioning portion and the second annular positioning portion fit together and can rotate relative to each other. The cooperation between the first annular positioning portion and the second annular positioning portion can constrain the positioning assembly of the rear cover and the head, ensuring stability. The cooperation between the slot and the clip can lock the rear cover on the head, and while achieving rapid assembly and disassembly, it can avoid the problem of thread slippage and shaking caused by the threaded connection in the existing technology. The fan blades are fixedly connected to a rotating shaft, and a bearing is mounted on the rear cover. The rotating shaft is interference-fitted into the inner ring of the bearing. A first transmission coupler is detachably mounted on the rear end of the rotating shaft, and a second transmission coupler is mounted on the motor shaft. The second transmission coupler is coupled to the first transmission coupler for transmission. During disassembly, simply separate the rear cover from the machine head, and the front cover, fan blades, and rear cover can be removed from the machine head together. The two transmission couplers will separate, allowing for quick disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic diagram of the three-dimensional structure of a fan;

[0013] FIG2 is a schematic diagram of a cross-sectional structure of a fan;

[0014] FIG3 is an enlarged structural diagram of point A in FIG2 ;

[0015] FIG4 is a schematic diagram of the exploded cross-sectional structure of the fan;

[0016] FIG5 is a second schematic diagram of the cross-sectional structure of the fan;

[0017] FIG6 is an enlarged structural diagram of point B in FIG5 ;

[0018] FIG7 is a third schematic diagram of the cross-sectional structure of the fan;

[0019] FIG8 is an enlarged structural diagram of point C in FIG7;

[0020] FIG9 is a schematic diagram of a three-dimensional structure of the machine head in the present invention;

[0021] Figure 10 is a second schematic diagram of the three-dimensional structure of the machine head in the present invention;

[0022] FIG11 is a schematic diagram of the three-dimensional structure of the rear cover of the present invention. Best Mode for Carrying Out the Invention

[0023] DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Referring to Figures 1 to 11, a quickly detachable fan structure includes a base 101, a mounting rod 102 is provided on the base 101, a head 10 is provided on the mounting rod 102, a rear cover 20 is installed on the front side of the head 10, a front cover 40 is installed on the front side of the rear cover 20, fan blades 50 are provided between the rear cover 20 and the front cover 40, and a motor 60 is provided in the head 10. It is characterized in that: a plurality of hooks 110 are provided in a circumferential array on the front wall surface of the head 10, a slot 100 with an open side is formed in the hook 110, and a plurality of clips 210 that engage with the slot 100 are provided in a circumferential array on the rear wall surface of the rear cover 20;

[0026] A first annular positioning portion 120 is provided on the front wall of the head 10, and a second annular positioning portion 200 is provided on the rear wall of the rear cover 20 to cooperate with the first annular positioning portion 120. The first annular positioning portion 120 and the second annular positioning portion 200 are in contact with each other and can rotate relative to each other.

[0027] The fan blade 50 is fixedly connected to the rotating shaft 510, and the bearing 80 is installed on the rear cover 20. The rotating shaft 510 is interference fit in the inner ring of the bearing 80. The rear end of the rotating shaft 510 is detachably installed with a first transmission coupler 910, and the motor shaft 610 of the motor 60 is installed with a second transmission coupler 920, and the second transmission coupler 920 is coupled to the first transmission coupler 910 for transmission.

[0028] When the rear cover is assembled, the first annular positioning portion 120 is fitted with the second annular positioning portion 200 to position the head 10 and the rear cover 20, and then the rear cover 20 is driven to rotate relative to the head 10 to enable the clamping member 210 to be screwed into the clamping slot 100 to complete the locking.

[0029] Under the premise of realizing rapid disassembly and assembly of the rear cover 20 and the machine head 10, the utility model adopts the second transmission coupler 920 to couple the transmission with the first transmission coupler 910, so as to realize rapid separation of the fan blades 50 and the motor shaft 610, so that during later cleaning and maintenance, the front cover and the fan blades together with the rear cover 20 can be removed from the machine head 10 after the rear cover 20 is removed, without the need to disassemble them one by one.

[0030] Specifically, the front cover 40 and the rear cover 20 are assembled by using existing buckles or screws.

[0031] Referring to Figures 3 and 4, the rear cover 20 is provided with a bearing hole 230 and a coupling cavity 220 that are interconnected front and back. The bearing 80 is arranged in the bearing hole 230, and the outer ring of the bearing 80 is fixed to the rear cover 20. The second transmission coupler 920 and the first transmission coupler 910 are coupled in the coupling cavity 220.

[0032] Specifically, the coupling cavity 220 is open at the rear end. During assembly, the rotating shaft 510 passes through the bearing 80, and its rear end is fixedly connected to the first transmission coupler 910 within the coupling cavity 220. When the rear cover 20 and the handpiece 10 are assembled, the first transmission coupler 910 and the second transmission coupler 920 are plugged into and mated with each other within the coupling cavity 220 to achieve coupled transmission.

[0033] Furthermore, the purpose of the threaded connection between the first transmission coupler 910 and the rotating shaft 510 is that the first transmission coupler 910 can be quickly removed from the rotating shaft 510 during cleaning and disassembly, so that the rotating shaft 610 on the fan blade 50 can be removed from the bearing 80 from the back to the front, so that the fan blade 50 can be removed for cleaning.

[0034] In the present invention, the rear end of the rotating shaft 510 is threadedly connected to the first transmission coupler 910 .

[0035] Specifically, a sealing sleeve 70 is disposed in the bearing hole 230 , and the bearing 80 is disposed in the sealing sleeve 70 .

[0036] 8 to 11 , a protrusion 113 is provided on the wall of the engaging portion 112 facing the engaging slot 100 , and a recess 211 cooperating with the protrusion 113 is provided on the wall of the engaging portion 112 of the engaging member 210 .

[0037] When the latch 210 is screwed into the slot 100, the protrusion 113 is embedded in the recess 211, preventing the latch 210 from being disengaged from the slot 100 without external force, thus locking the latch 210. To remove the rear cover 20, a certain external force must be applied to the rear cover 20 to deform the hook 110, disengaging the protrusion 113 from the recess 211 and allowing the latch 210 to be removed from the slot 100.

[0038] Specifically, the first annular positioning portion 120 is a convex ring provided on the front wall of the nose 10, and the second annular positioning portion 200 is a circular positioning cavity provided on the rear wall of the rear cover 20. The convex ring is embedded in the circular positioning cavity and fits with the inner wall of the circular positioning cavity.

[0039] Referring to Figure 6 , a microswitch 30 is mounted on the head 10, with the trigger end of the microswitch 30 extending into any one of the slots 100. To ensure safety, the microswitch 30 is connected to the fan's main control circuit board. After the rear cover 20 is installed, the clip 210 is locked in the slot 100, which contacts the trigger end of the microswitch 30 to transmit an electrical signal to the fan's main control circuit board. After the clip 210 leaves the slot 100, if nothing is touching the trigger end of the microswitch 30, a signal is sent to the fan's main control circuit board to cut off the circuit and prevent the fan blades from continuing to rotate.

[0040] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A quickly detachable fan structure, comprising a base (101), a mounting rod (102) being arranged on the base (101), a head (10) being arranged on the mounting rod (102), a rear cover (20) being arranged on the front side of the head (10), a front cover (40) being arranged on the front side of the rear cover (20), a fan blade (50) being arranged between the rear cover (20) and the front cover (40), and a motor (60) being arranged in the head (10), characterized in that: A plurality of hooks (110) are arranged in a circumferential array on the front wall surface of the machine head (10), a slot (100) with an opening on one side is formed in the hook (110), and a plurality of clamping members (210) for clamping and cooperating with the slot (100) are arranged in a circumferential array on the rear wall surface of the rear cover (20); A first annular positioning portion (120) is provided on the front wall surface of the machine head (10), and a second annular positioning portion (200) matching with the first annular positioning portion (120) is provided on the rear wall surface of the rear cover (20), wherein the first annular positioning portion (120) and the second annular positioning portion (200) are in close contact with each other and can rotate relative to each other; The fan blade (50) is fixedly connected to a rotating shaft (510); a bearing (80) is installed on the rear cover (20); the rotating shaft (510) is interference-fitted into the inner ring of the bearing (80); a first transmission coupler (910) is detachably installed at the rear end of the rotating shaft (510); a second transmission coupler (920) is installed on the motor shaft (610) of the motor (60); and the second transmission coupler (920) is coupled to the first transmission coupler (910) for transmission.

2. A quickly detachable fan structure according to claim 1, characterized in that: The hook (110) is composed of a limiting portion (111) and a clamping portion (112) which are connected to each other in an L-shape; the limiting portion (111) is arranged at one end of the clamping portion (112) and is fixedly connected to the machine head (10); a clamping groove (100) is formed between the clamping portion (112) and a front wall surface of the machine head (10); the rear cover (20) rotates relative to the machine head (10) so that the clamping member (210) is screwed into the clamping groove (100) or screwed out of the clamping groove (100).

3. The quickly detachable fan structure according to claim 2, characterized in that: A protruding portion (113) is provided on the wall surface of the clamping portion (112) facing the clamping slot (100), and a recessed portion (211) matching with the protruding portion (113) is provided on the wall surface of the clamping member (210) facing the clamping portion (112).

4. A quickly detachable fan structure according to any one of claims 1 to 3, characterized in that: The first annular positioning portion (120) is a convex ring arranged on the front wall surface of the machine head (10), and the second annular positioning portion (200) is a circular positioning cavity arranged on the rear wall surface of the rear cover (20), wherein the convex ring is embedded in the circular positioning cavity and fits with the inner wall of the circular positioning cavity.

5. A quickly detachable fan structure according to any one of claims 1 to 3, characterized in that: A micro switch (30) is mounted on the machine head (10), and a trigger end of the micro switch (30) extends into any one of the card slots (100).

6. A quickly detachable fan structure according to any one of claims 1 to 3, characterized in that: The rear cover (20) is provided with a bearing hole (230) and a coupling cavity (220) which are interconnected frontally and rearwardly, the bearing (80) is arranged in the bearing hole (230), the outer ring of the bearing (80) and the rear cover (20) are fixed to each other, and the second transmission coupler (920) and the first transmission coupler (910) are coupled in the coupling cavity (220).

7. A quickly detachable fan structure according to any one of claims 1 to 3, characterized in that: The rear end of the rotating shaft (510) is threadedly connected to the first transmission coupler (910).

8. The quickly detachable fan structure according to claim 6, characterized in that: A sealing sleeve (70) is arranged in the bearing hole (230), and the bearing (80) is arranged in the sealing sleeve (70).

Images