Detachable fan structure

Abstract

The utility model discloses a detachable fan structure which comprises a machine head, a rear cover and a fan blade element, the rear cover is detachably installed on the machine head, a motor is arranged on the machine head, a power output shaft of the motor is connected with a driving coupler, a bearing is installed on the rear cover, and a rotating shaft is arranged on an inner ring of the bearing. A driven coupler in coupling transmission with the driving coupler is arranged at the rear end of the rotating shaft, a mounting hole penetrating front and back is formed in the fan blade element, the rotating shaft is inserted into the mounting hole, the front end of the rotating shaft extends to the front side of the fan blade element, a limiting knob is arranged at the front end of the rotating shaft, and the rear end face of the limiting knob is attached to the front end face of the fan blade element for limiting; the rear end of the fan blade element is attached to the limiting boss of the rotating shaft or attached to the front end face of the bearing inner ring. According to the utility model, the rotating shaft is arranged in the bearing, and the rotating shaft is restrained by the bearing, so that the coaxiality of the rotating shaft and the motor is ensured, and the problems of abrasion, noise and even damage caused by eccentricity are avoided. Meanwhile, the limiting knob is arranged as a front limit, and the rear side of the limiting knob is used for limiting the fan blade element through the limiting boss or the front end face of the bearing inner ring, so that the front-back position of the fan blade element can be effectively restrained.

Description

Technical Field

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

[0002] Prior art, such as Chinese utility model patent document with publication number CN220354149U, discloses a transmission structure of a mesh cover assembly and a fan, including a casing, a motor is installed in the casing, a motor shaft of the motor passes through the casing and extends forward, a mesh cover assembly is installed on the front side of the casing, the mesh cover assembly includes a rear cover, a front cover is installed on the front side of the rear cover, fan blades are arranged between the rear cover and the front cover, a driving head is installed on the motor shaft of the motor, the fan blades are fixedly connected to a transmission shaft, the rear end of the transmission shaft passes through the rear cover and extends backward, and the rear end of the transmission shaft is installed with a driven head coupled to the driving head for transmission.

[0003] Based on the above, in the prior art, when assembling the fan blades, the transmission shaft fixedly connected to the fan blades is plugged into the rear cover, and then the drive head is plugged into the rear end of the transmission shaft. The technical problem with this plug-in assembly method is that the transmission shaft is fixed to the fan blades, and when assembling, the transmission shaft and the rear cover are plugged and assembled, which easily leads to the problem of eccentricity between the transmission shaft and the rear cover. When the transmission shaft is eccentric, it affects the coupling transmission of the drive head and the driven head, resulting in wear, noise, and even damage. Therefore, further improvements to the prior art are needed. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a detachable fan structure.

[0005] A detachable fan structure designed for this purpose comprises a head, a rear cover and a fan element, wherein the rear cover can be detachably mounted on the head, a motor is arranged on the head, a power output shaft of the motor is connected to a driving coupler, a bearing is mounted on the rear cover, a rotating shaft is arranged on the inner ring of the bearing, a driven coupler coupled to the driving coupler is arranged at the rear end of the rotating shaft, a mounting hole penetrating front and rear is arranged on the fan element, the rotating shaft is inserted into the mounting hole and the front end extends to the front side of the fan element, a limit knob is arranged at the front end of the rotating shaft, the rear end face of the limit knob is fitted with the front end face of the fan element for limiting the position, and the rear end of the fan element is fitted with the limiting boss of the rotating shaft or with the front end face of the inner ring of the bearing.

[0006] Preferably, a mounting shell is disposed in the rear cover, the bearing and the rotating shaft are disposed in the mounting shell, the front end surface of the mounting shell is opened, and the rotating shaft extends forward through the front end opening of the mounting shell;

[0007] A coupling cavity is arranged in the rear cover at the rear side of the installation shell, and the coupling cavity is communicated with the interior of the installation shell.

[0008] Preferably, the limit knob is threadedly connected to the limit knob.

[0009] Preferably, a limiting bracket is arranged in the installation shell, a bearing installation cavity is formed between the front side of the limiting bracket and the front inner wall of the installation shell, and the bearing is arranged in the bearing installation cavity.

[0010] Preferably, a connecting ring is arranged in the rear cover, the engaging cavity is arranged at the rear side of the connecting ring, and the mounting housing is arranged at the front side of the connecting ring and is fixedly connected to the connecting ring;

[0011] The driven coupler is located in the mounting housing;

[0012] The machine head is provided with a joint part plugged into the joint cavity, and the front end surface of the joint part is in contact with the rear end surface of the connecting ring;

[0013] The connecting ring is provided with a first screw-in groove array along its circumference, and a clamping block which can be screwed into the first screw-in groove is provided on the front end surface of the engaging portion.

[0014] Preferably, a fitting limit portion is provided on the rear end surface of the fan blade element, and the rear end surface of the fitting limit portion fits with the front end surface of the inner ring of the bearing.

[0015] Preferably, a sensing groove is provided on the joint portion, a sensing element is provided on the joint portion, a sensing end of the sensing element extends into the sensing groove, and a trigger element is provided on the mounting shell which can be screwed into the sensing groove and sense each other with the sensing end of the sensing element.

[0016] Compared with the prior art, the utility model has a bearing installed on the rear cover, a rotating shaft is provided on the inner ring of the bearing, a driven coupler coupled to the driving coupler is provided at the rear end of the rotating shaft, a mounting hole penetrating from front to back is provided on the fan element, the rotating shaft is inserted into the mounting hole and the front end extends to the front side of the fan element, a limit knob is provided at the front end of the rotating shaft, the rear end face of the limit knob is fitted with the front end face of the fan element, and the rear end of the fan element is fitted with the limit boss of the rotating shaft or the front end face of the inner ring of the bearing. The utility model sets the rotating shaft in the bearing and constrains the rotating shaft through the bearing to ensure coaxiality with the motor, so as to avoid eccentric wear, noise, and even damage. At the same time, the utility model sets a limit knob as the front limit, and the rear side limits the fan element through the limit boss or the front end face of the inner ring of the bearing, which can effectively constrain the front and rear positions of the fan element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the exploded structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the exploded cross-sectional structure of the utility model;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the rear cover in the utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the rear cover and the joint part of the utility model;

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of the rear cover and the joint part of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1-Figure 6A detachable fan structure, comprising a head 10, a rear cover 20 and a fan blade element 50, wherein the rear cover 20 is detachably mounted on the head 10, a motor 30 is arranged on the head 10, and a power output shaft of the motor 30 is connected with a driving coupler 310, characterized in that: a bearing 240 is mounted on the rear cover 20, a rotating shaft 40 is arranged on the inner ring of the bearing 240, and a driven coupling 40 is arranged at the rear end of the rotating shaft 40 for coupling and transmission with the driving coupler 310 The device 410 is provided with a mounting hole 510 that penetrates from front to back on the fan element 50. The rotating shaft 40 is inserted into the mounting hole 510 and the front end extends to the front side of the fan element 50. A limit knob 60 is provided at the front end of the rotating shaft 40. The rear end face of the limit knob 60 is fitted with the front end face of the fan element 50 for limiting. The rear end of the fan element 50 is fitted with the limiting boss 400 of the rotating shaft 40 or the front end face of the inner ring of the bearing 240. The utility model sets the rotating shaft in the bearing and constrains the rotating shaft through the bearing to ensure coaxiality with the motor, so as to avoid eccentric wear, noise, and even damage. At the same time, the utility model sets a limit knob as the front limit, and the rear side limits the fan element through the limiting boss or the front end face of the inner ring of the bearing, which can effectively constrain the front and rear positions of the fan element.

[0025] See also Figure 3 The rear cover 20 is provided with a mounting housing 210, the bearing 240 and the rotating shaft 40 are provided in the mounting housing 210, the front end surface of the mounting housing 210 is provided with an opening, and the rotating shaft 40 extends forward through the front end opening of the mounting housing 210;

[0026] A coupling cavity 201 is disposed in the rear cover 20 at the rear side of the installation shell 210 , and the coupling cavity 201 is communicated with the interior of the installation shell 210 .

[0027] Based on the above embodiment, the function of the mounting shell 210 is that during production and assembly, the bearing 240, the rotating shaft 40 and the driving coupler 310 can be pre-installed in the mounting shell 210, and then the mounting shell 210 carrying accessories and the rear cover 20 can be assembled, which can effectively improve the production efficiency and meet the production requirements.

[0028] Furthermore, the rear cover 20 is fixedly connected to the mounting housing 210 by bolts.

[0029] Further, the limit knob 60 is threadedly connected to the limit knob 60 .

[0030] See also Figure 1 and Figure 3A limiting bracket 230 is disposed in the mounting housing 210, a bearing mounting cavity 220 is formed between the front side of the limiting bracket 230 and the front inner wall of the mounting housing 210, and the bearing 240 is disposed in the bearing mounting cavity 220. The limiting bracket 230 and the mounting housing 210 clamp and fix the outer ring of the bearing 240 in front and back to achieve fixed assembly of the bearing 240.

[0031] See also Figure 4 and Figure 5 , a connecting ring 202 is disposed in the rear cover 20, the engaging cavity 201 is disposed at the rear side of the connecting ring 202, and the mounting housing 210 is disposed at the front side of the connecting ring 202 and fixedly connected to the connecting ring 202;

[0032] The driven coupler 410 is located in the mounting housing 210;

[0033] The machine head 10 is provided with a joint portion 110 inserted into the joint cavity 201, and the front end surface of the joint portion 110 is in contact with the rear end surface of the connecting ring 202;

[0034] The connection ring 202 is provided with first screw-in grooves 203 in an array along its circumference, and the front end surface of the joint portion 110 is provided with a clamping block 111 that can be screwed into the first screw-in groove 203 .

[0035] During assembly, the rear cover 20 and the joint portion 110 are plugged together, and then the rear cover 20 is rotated to screw the clamping block 111 into the first screw buckle groove 203 to complete the screw buckle fit to constrain the position of the rear cover 20 .

[0036] See also Figure 1 The rear end surface of the fan blade element 50 is provided with a fitting limiter 500, and the rear end surface of the fitting limiter 500 fits with the front end surface of the inner ring of the bearing 240. During assembly, the fitting limiter 500 passes through the mounting housing 210 and fits with the front end surface of the inner ring of the bearing 240 to restrict the front and rear position of the fan blade element 50.

[0037] See also Figure 6 The joint portion 110 is provided with a sensing groove 112, the joint portion 110 is provided with a sensing element 70, the sensing end of the sensing element 70 extends into the sensing groove 112, and the mounting shell 210 is provided with a trigger element 214 which can be screwed into the sensing groove 112 and sensed by the sensing end of the sensing element 70.

[0038] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0039] 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 indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, 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 the indicated technical features.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A detachable fan structure, comprising a head (10), a rear cover (20) and a fan blade element (50), wherein the rear cover (20) is detachably mounted on the head (10), a motor (30) is arranged on the head (10), and a power output shaft of the motor (30) is connected to a drive coupler (310), characterized in that: A bearing (240) is installed on the rear cover (20), a rotating shaft (40) is provided on the inner ring of the bearing (240), a driven coupler (410) coupled to the driving coupler (310) is provided at the rear end of the rotating shaft (40), and a mounting hole (510) penetrating from front to back is provided on the fan element (50), the rotating shaft (40) is inserted into the mounting hole (510) and the front end extends to the front side of the fan element (50), a limit knob (60) is provided at the front end of the rotating shaft (40), the rear end face of the limit knob (60) is fitted with the front end face of the fan element (50) for limiting, and the rear end of the fan element (50) is fitted with the limit boss (400) of the rotating shaft (40) or the front end face of the inner ring of the bearing (240).

2. A detachable fan structure according to claim 1, characterized in that: A mounting shell (210) is arranged inside the rear cover (20), the bearing (240) and the rotating shaft (40) are arranged inside the mounting shell (210), the front end surface of the mounting shell (210) is opened, and the rotating shaft (40) passes through the front end opening of the mounting shell (210) and extends forward; A joining cavity (201) is provided in the rear cover (20) at the rear side of the installation shell (210), and the joining cavity (201) is communicated with the interior of the installation shell (210).

3. The detachable fan structure according to claim 1, characterized in that: The limit knob (60) is threadedly connected to the limit knob (60).

4. The detachable fan structure according to claim 2, characterized in that: A limiting bracket (230) is arranged in the installation shell (210), a bearing installation cavity (220) is formed between the front side of the limiting bracket (230) and the front inner wall of the installation shell (210), and the bearing (240) is arranged in the bearing installation cavity (220).

5. The detachable fan structure according to claim 2, characterized in that: A connecting ring (202) is arranged in the rear cover (20), the engaging cavity (201) is arranged on the rear side of the connecting ring (202), and the mounting housing (210) is arranged on the front side of the connecting ring (202) and is fixedly connected to the connecting ring (202); The driven coupler (410) is located in the mounting housing (210); The machine head (10) is provided with a joint portion (110) inserted into the joint cavity (201), and the front end surface of the joint portion (110) is in contact with the rear end surface of the connecting ring (202); The connecting ring (202) is provided with first screw-in grooves (203) in an array along its circumference, and a clamping block (111) which can be screwed into the first screw-in groove (203) is provided on the front end surface of the joint portion (110).

6. The detachable fan structure according to claim 1, characterized in that: A fitting limit portion (500) is provided on the rear end surface of the fan blade element (50), and the rear end surface of the fitting limit portion (500) fits with the front end surface of the inner ring of the bearing (240).

7. The detachable fan structure according to claim 5, characterized in that: The joint portion (110) is provided with a sensing groove (112), the joint portion (110) is provided with a sensing element (70), the sensing end of the sensing element (70) extends into the sensing groove (112), and the mounting housing (210) is provided with a trigger element (214) which can be screwed into the sensing groove (112) and mutually sensed with the sensing end of the sensing element (70).

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