Rotating mechanism and fan

Abstract

The utility model discloses a rotating mechanism and a fan. The rotating mechanism comprises a base, a rotating assembly, a driving assembly, a shell and a main controller. The rotating assembly is rotatably arranged on the base through the hollow shaft, the upper surface of the base and the lower surface of the rotating assembly are provided with a first annular groove and a second annular groove respectively to form a first channel in a combined mode, balls with the specified number and diameter are arranged in the first channel, and rib plates are arranged in the front-back direction in the rolling direction of the balls. A positioning cavity is defined by the rib plate and the second annular groove, and lubricating grease is added into a gap between the positioning cavity and the ball. According to the arrangement mode of the balls, on the premise that high stability is kept, the service life is prolonged, and meanwhile noise, assembly difficulty and manufacturing cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a rotating mechanism and a fan having the rotating mechanism. Background Technology

[0002] In daily life, small electrical appliances such as electric fans, indoor heaters, and display stands need to periodically change their orientation to maximize their functionality. The rotating mechanism is the key device for achieving this periodic orientation change. When the rotating mechanism is working, the appliance's center of gravity often shifts, causing it to wobble or even tip over. To address this, existing technologies typically incorporate grooves in the base and rotating components to accommodate ball bearings, reducing wobbling. It's generally believed that more ball bearings increase the stability of the rotating mechanism. However, using too many ball bearings with existing technology has revealed that excessive ball bearings significantly accelerate groove wear, hindering rotation and reducing the mechanism's lifespan. Conversely, too few ball bearings cannot maintain stability. Therefore, determining how to configure the ball bearings to ensure both stability and a longer lifespan for the rotating mechanism is a pressing issue. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a rotating mechanism and a fan having the rotating mechanism that can rotate stably and have a longer service life regardless of whether external components are connected, in order to overcome the shortcomings of the prior art.

[0004] The solution to the above technical problem is: a rotating mechanism, including a base, a rotating component, a driving component, a ball bearing, and a main controller;

[0005] A truncated cone with a hole at the top and a first annular groove at the same center as the truncated cone are provided at the center of the upper surface of the base. A first gear is fixedly fitted on the truncated cone.

[0006] The rotating assembly includes: a hollow shaft with an opening at the top of the frustum and rotatable; a rotating platform fixedly connected to the top of the hollow shaft and having a second annular groove on its lower surface; and a housing mounted on the rotating platform and forming a cavity with the rotating platform. The second annular groove and the first annular groove are opposite to each other to form a first channel for accommodating a ball. A gap is left between the first annular groove and the second annular groove. Ribs of the same height as the groove of the second annular groove are provided along the rolling direction of the ball. The ribs and the groove walls of the second annular groove form a positioning cavity. The gap between the positioning cavity and the ball is used to store lubricating grease.

[0007] A plurality of the ball bearings are distributed in the first channel, wherein the number of the ball bearings is 7-8 and the diameter is 8-10 mm.

[0008] Preferably, the drive assembly includes a motor fixedly connected to the upper surface of the rotary table, the rotary table has a through hole at a position corresponding to the power shaft of the motor, and a second gear is provided on the power shaft of the motor, the second gear extending out from the through hole of the rotary table and meshing with the gear;

[0009] The main controller is electrically connected to the motor, and the main controller controls the motor to turn on or off.

[0010] The upper surface of the housing is also provided with an external interface for fixing external components and providing power and control signals to the external components.

[0011] Preferably, the ball bearings and their respective positioning cavities are disposed at unequal intervals within the first channel, so as to shift the center of gravity of the rotating mechanism toward its center.

[0012] Preferably, the bottom of both the first annular groove and the second annular groove is an arc shape that fits against the ball. The depth of the first annular groove is less than the radius of the ball, the depth of the second annular groove is greater than the radius of the ball, the width of the second annular groove is equal to the diameter of the ball, and a stop is provided at the position where the wall of the first annular groove is wider than the wall of the second annular groove.

[0013] Preferably, the frustum is hollow inside and forms a bearing cavity with an opening at the bottom. A bearing is fixed inside the bearing cavity by a metal fixing plate. The metal fixing plate is fixedly connected to the lower surface of the base, and the hollow shaft passes through the bearing.

[0014] Preferably, a washer is fixed between the bearing and the metal fixing plate by a retaining spring, the washer being used to reduce vibration when the rotating mechanism rotates and when the external components are working.

[0015] Preferably, the rotating assembly is further provided with a signal receiver, which is electrically connected to the main controller.

[0016] Preferably, the upper surface of the housing is further provided with a display touch panel, which is electrically connected to the main controller. The display touch panel is used to control the rotating mechanism and external components, and to display status information.

[0017] Preferably, the lower surface of the base is provided with rubber feet to reduce wobbling.

[0018] A fan includes a rotating mechanism with an external interface as described above and a fan body inserted into the external interface.

[0019] The rotating mechanism of this utility model has a truncated cone with a hole at the top protruding from the center of a circular base. A first annular groove, concentric with the truncated cone, is provided on the base. A gear is fixedly fitted onto the truncated cone. A hollow shaft is inserted into the hole at the top of the truncated cone, and the top of the hollow shaft is fixedly connected to the center of the lower surface of the rotating platform. A second annular groove is provided on the lower surface of the rotating platform opposite the first annular groove. The first and second annular grooves combine to form a first channel for accommodating balls. Ribs are provided in the second annular groove along the rolling direction of the balls, one in front of and one behind the balls. The ribs and the groove wall of the second annular groove form a positioning cavity. Lubricating grease is added to the gap between the balls and the positioning cavity. The number of balls spaced apart in the first channel is 7-8, with a diameter of 8-10 mm.

[0020] This utility model differs from the prior art in that it does not limit the number and size of the balls. It proposes a technical solution in which 7-8 balls with a diameter of 8-10mm are set in the first channel, and a positioning cavity is set in the first channel to add lubricating grease. This not only provides sufficient stability for the rotating mechanism during operation, but also effectively reduces the wear caused by excessive balls in pursuit of stability, which leads to a shortened service life. In addition, it can also reduce noise, reduce assembly difficulty and manufacturing cost. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of one embodiment of the rotating mechanism of this utility model;

[0022] Figure 2 This is an exploded view of one embodiment of a rotating mechanism according to the present invention;

[0023] Figure 3 This is a cross-sectional view of one embodiment of a rotating mechanism according to the present invention;

[0024] Figure 4 This is a structural schematic diagram of the rotating platform from a bottom-view angle in one embodiment of the rotating mechanism of this utility model;

[0025] Figure 5 This is a bottom view of a rotating table (7 balls) in one embodiment of a rotating mechanism according to the present invention;

[0026] Figure 6 This is a bottom view of a rotating table (8 balls) in one embodiment of a rotating mechanism according to the present invention;

[0027] Figure 7 This is a partial enlarged view of the first channel in one embodiment of a rotating mechanism according to the present invention;

[0028] Figure 8 This is a partial enlarged view of the positioning cavity in one embodiment of a rotating mechanism according to the present invention.

[0029] Explanation of reference numerals in the attached drawings: 10-rotating mechanism, 100-base, 200-rotating assembly, 300-drive assembly, 400-ball bearing, 110-frustum, 120-first annular groove, 121-stop, 130-first gear, 140-metal fixing plate, 150-bearing, 150a-bearing cavity, 160-circlip, 170-washer, 180-base cover plate, 190-rubber foot pad, 210-hollow shaft, 220-rotating table, 230-outer shell, 240-second annular groove, 241-rib plate, 241a-positioning cavity, 250-external interface, 260-signal receiver, 270-display touch panel, 310-motor, 320-second gear, 400a-first channel. Detailed Implementation

[0030] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] This utility model discloses a rotating mechanism; for details, please refer to... Figure 1-8The rotating mechanism for small electrical appliances in this embodiment includes: a circular base 100 for supporting components, a rotating assembly 200 disposed above the base 100, and ball bearings 400 providing support. A frustum 110 with a top opening is protruding at the center of the upper surface of the base 100. A stationary first gear 130 is fixedly fitted on the frustum 110. A first annular groove 120 with the same center as the circular base is provided on the upper surface of the base 100. The rotating assembly 200 is rotatably inserted into the hole at the top of the frustum 110 via a hollow shaft 210. The rotating platform 220 and the outer casing 230 are connected by snap-fit ​​and bolt connections to form a cavity. The top of the hollow shaft 210 is fixedly connected to the center of the lower surface of the rotating platform 220. The lower surface of the rotary table 220 is provided with a second annular groove 240 corresponding to the first annular groove 120. The first annular groove 120 and the second annular groove 240 are opposite each other to form a first channel 400a for accommodating balls. The first annular groove 120 and the second annular groove 240 do not contact each other and are left with a gap. In the first channel 400a, along the rolling direction of the balls 400, two ribs 241 are provided at the front and rear of the balls, with the same height as the groove of the second annular groove. The ribs 241 and the groove wall of the second annular groove 240 enclose a positioning cavity 241a. There is a gap between the positioning cavity 241a and the balls 400 to store lubricating grease. The number of balls 400, with a diameter of 8-10 mm, is arranged at intervals in the first channel 400a.

[0032] In this embodiment, the specific working process of the rotating mechanism of this application is as follows: When the rotating mechanism needs to work, the main controller controls the drive component 300 to start, and the drive component 300 drives the rotating component 200 to rotate around the hollow shaft 210. The ball bearings 400 and their respective positioning cavities 241a are spaced apart in the first channel 400a. When the rotating component 220 rotates, it effectively reduces the overall shaking of the rotating mechanism. Lubricating grease is added to the positioning cavity 241a, making the rotation of the rotating component 220 smoother. Due to the presence of lubricating grease, an oil film is formed between the ball bearings 400 and the first annular groove 120 and the second annular groove 240, which can effectively reduce the wear of the three and improve the service life of the ball bearings 400, the first annular groove 120 and the second annular groove 240. By studying the relationship between the number of ball bearings 400 with the same diameter, the number of ball bearings 400 with different diameters, and the stability and lifespan of the rotating mechanism, and taking into account factors such as noise, assembly efficiency, and manufacturing cost, it was found that setting the number of ball bearings 400 to 7-8 and the diameter to 8-10mm is the optimal range for the rotating mechanism. Within this range, the rotating mechanism has good stability, long lifespan, low noise, relatively high assembly efficiency, and relatively low manufacturing cost.

[0033] In this embodiment, Figure 5 and Figure 6The images show bottom views of a rotary table (7 balls) and a rotary table (8 balls). Under the same conditions, the difference in stability, service life and noise between the 7-ball and 8-ball rotary mechanisms is negligible. However, there are slight differences in assembly difficulty and manufacturing cost. The 7-ball rotary mechanism is more difficult to assemble and has a lower manufacturing cost, while the 8-ball rotary mechanism is easier to assemble and has a higher manufacturing cost.

[0034] It should be noted that the main controller is used to control the operation of the drive component 300 and external components. The main controller can be a microcontroller or a PLC controller. The main controller is electrically connected to the following components: motor 310 and external components. The type of motor 310 can be selected according to actual needs, including but not limited to: stepper motor, servo motor, etc. The range for testing the number and diameter of the ball bearings 400 and the stability and lifespan of the rotating mechanism is selected as follows: the number of ball bearings 400 is 3-16, and the diameter is 5mm-15mm, taking the integer value. The test method for stability and lifespan is as follows: within 5000 hours, the rotating mechanism should not experience any stopping, jamming, uneven oscillation, or noise to test stability; after 5000 hours, the test continues until the above situations occur to test stability and lifespan.

[0035] In one embodiment, such as Figure 2 , Figure 3 As shown, the drive assembly 300 includes a motor 310 fixedly connected to the upper surface of the rotary table 220. The drive shaft of the motor 310 has a through hole at a corresponding position on the upper surface of the rotary table 220. A second gear 320 on the drive shaft of the motor 310 extends from the through hole on the rotary table 220 and meshes with a first gear 130. A main controller is located on the rotary table 220 and electrically connected to the motor 310. The main controller controls the opening and closing of the motor 310, thereby controlling the rotation of the rotating mechanism.

[0036] The drive shaft of motor 310 drives the second gear 320 to rotate. The second gear 320 and the first gear 130 belong to a simple planetary gear system and mesh with each other. Since the first gear 130 is fixed on the frustum 110 of the base 220 and remains stationary, when the second gear 320 starts to rotate, the interaction force between the first gear 130 and the second gear 320 causes the second gear 320 to rotate around the first gear 130 macroscopically, thereby driving the rotating assembly 220 to rotate around the center of the frustum 110, i.e., the center of the base 220. The main controller controls the rotation direction of the rotating mechanism by controlling the rotation direction of motor 310.

[0037] In this embodiment, as Figure 1 , Figure 2 , Figure 3As shown, the upper surface of the housing 230 of the rotating mechanism has an external interface 250 for fixing external components and providing power and control signals to the external components. The external interface 250 fixes the external components in the following ways: snap-fit ​​connection, clamp connection, magnetic connection, threaded connection, plug-in connection, hinge connection, etc. The external interface 250 has an interface for electrical connection with the external components and the main controller, so that the main controller is electrically connected to the external components and controls the external components. The rotating mechanism with the external interface can adapt to different external components as needed and provide stable rotation function.

[0038] In one embodiment, such as Figure 1 , Figure 2 As shown, when external components are connected to the rotating mechanism, the center of gravity of the external components is not taken into account during manufacturing, often resulting in a shift in the center of gravity. This shift reduces the stability of the rotating mechanism, especially during non-360° rotations. The balls 400 near the center of gravity experience accelerated wear on themselves and their corresponding first and second annular grooves 120 and 240, ultimately shortening the lifespan of the rotating mechanism. Therefore, the balls 400 and their corresponding positioning cavities 241a are arranged unequally within the first channel 400a. Specifically, the spacing depends on the center of gravity of the external interface 250 behind the external component. Balls 400 are spaced closer to the center of gravity and spaced further away, with smaller spacing to balance the pressure on each ball 400. This effectively reduces wear on each ball 400 and its corresponding first and second annular grooves 120 and 240, thereby increasing the lifespan of the rotating mechanism.

[0039] In one embodiment, such as Figure 3 , Figure 7 As shown, the bottoms of the first annular groove 120 and the second annular groove 240 are both arc-shaped, fitting snugly against the ball 400. The arc-shaped bottoms increase the contact area between the ball 400 and the first annular groove 120 and the second annular groove 240, effectively dispersing the pressure on the ball 400 itself and its corresponding positions in the first annular groove 120 and the second annular groove 240, reducing wear and extending the service life of the rotating mechanism. The depth of the first annular groove 120 is less than the radius of the ball 400, and the depth of the second annular groove 240 is greater than the radius of the ball 400. The width of the second annular groove 240 is equal to the diameter of the ball 400. A stop 121 protrudes from the position where the wall of the first annular groove 120 is wider than the wall of the second annular groove 240, ensuring that most of the ball 400 is contained within the second annular groove 240. Combined with the stop 121 on the first annular groove 120, this reduces the possibility of the ball 400 shifting or sliding out, improving the reliability of the rotating mechanism.

[0040] In one embodiment, such as Figure 2 , Figure 3 As shown, the frustum 110 on the base 100 is hollow inside and forms a bearing cavity 150a with an opening at the bottom. A bearing 150 is fixed in the bearing cavity 150a by a metal fixing plate 140. The metal fixing plate 140 is bolted to the lower surface of the base 100. The hollow shaft 210 of the rotating assembly 200 passes through the opening at the top of the frustum 110 and is connected to the bearing 150. This can improve the stability of the rotating assembly 200 when rotating, increase wear resistance, and thus improve the service life of the rotating mechanism.

[0041] In one embodiment, such as Figure 2 As shown, based on the previous embodiment, a gasket 170 is fixed between the bearing 150 and the metal fixing plate 140 by a snap ring 160. The gasket 170 can absorb vertical impacts, reduce vibrations during the rotation of the rotating mechanism and the operation of external components, and further improve the stability of the rotating mechanism. The material of the gasket 170 is selected according to the application scenario, including but not limited to: rubber gasket, asbestos gasket, polytetrachloroethylene gasket, graphite gasket, metal gasket, and metal-non-metal composite gasket.

[0042] In one embodiment, such as Figure 2 , Figure 3 As shown, a signal receiver 260 electrically connected to the main controller is provided inside the rotating assembly 200 or on the housing 230. The signal receiver 260 is equipped with a remote controller. The signal receiver 260 transmits the received remote controller signal to the main controller. The main controller controls the rotating mechanism and external components, realizing remote control of the rotating mechanism and external components. Different types of signal receivers 260 can be selected according to actual needs, including but not limited to: radio frequency signal receivers, optical signal receivers and ultrasonic signal receivers.

[0043] In one embodiment, such as Figure 2 , Figure 3 As shown, a display touch panel 270 is also provided on the upper surface of the outer casing 230. The display touch panel 270 is electrically connected to the main controller and is used to control the rotation mechanism and external components, and to display status information. In this embodiment, the display touch panel 270 is a capacitive display touch panel. The display touch panel 270 has printed icons and buttons for wind speed, wind force, oscillation, timer, and increment / decrement functions. The main controller contains control programs for adjusting wind speed, wind force, oscillation, timer, and increment / decrement functions. Different types of display touch panels 270 can be selected according to actual needs, including but not limited to: resistive display touch panels, capacitive display touch panels, infrared display touch panels, and surface acoustic wave display touch panels.

[0044] In one embodiment, such as Figure 2 , Figure 3As shown, rubber feet 190 are provided at intervals on the lower surface of the base 100 to reduce swaying, which can effectively improve the stability of the rotating mechanism when it rotates on its own or when external components are working.

[0045] In one embodiment, a fan is provided, the fan body is inserted into the external interface 250 of the rotating mechanism and electrically connected to the main controller, which controls the fan to turn on or off.

[0046] The rotating mechanism of this utility model improves the stability and extends the service life of the rotating mechanism by setting a first annular groove and a second annular groove on the upper surface of the base and the lower surface of the rotating component, respectively, to form a first channel. Seven to eight balls with a diameter of 8 to 10 mm are set in the first channel, and a rib is set in front and behind each ball in the rolling direction. The groove walls of the two ribs and the second annular groove surround the ball to form a positioning cavity. Lubricating grease is added to the gap between the ball and the positioning cavity. At the same time, it reduces noise, assembly difficulty and manufacturing cost.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rotating mechanism, comprising a base (100), a rotating assembly (200), a driving assembly (300), a ball bearing (400), and a main controller, characterized in that: A truncated cone (110) with a hole at the top is provided at the center of the upper surface of the base (100), and a first annular groove (120) at the same center as the truncated cone (110). A first gear (130) is fixedly fitted on the truncated cone (110). The rotating assembly (200) includes: a hollow shaft (210) with a top opening and rotatable, inserted into the frustum (110); a rotating platform (220) fixedly connected to the top of the hollow shaft (210) and having a second annular groove (240) on its lower surface; and a housing (230) mounted on the rotating platform (220) and forming a cavity with the rotating platform (220); the second annular groove (240) and the first annular groove (120) are opposite to each other to accommodate ball bearings. The first channel (400a) of the ball (400) has a gap between the first annular groove (120) and the second annular groove (240). Ribs (241) of the same height as the groove of the second annular groove (240) are provided along the rolling direction of the ball (400). The ribs (241) and the groove wall of the second annular groove (240) enclose a positioning cavity (241a). The gap between the positioning cavity (241a) and the ball (400) is used to store lubricating grease. A plurality of the ball bearings (400) are distributed in the first channel (400a), the number of the ball bearings (400) being 7-8 and the diameter being 8-10 mm.

2. The rotating mechanism according to claim 1, characterized in that, The drive assembly (300) includes a motor (310) fixedly connected to the upper surface of the rotary table (220). The rotary table (220) has a through hole at a position corresponding to the power shaft of the motor (310). A second gear (320) is provided on the power shaft of the motor (310). The second gear (320) extends out from the through hole of the rotary table (220) and meshes with the first gear (130). The main controller is electrically connected to the motor (310), and the main controller controls the motor (310) to turn on or off; The upper surface of the housing (230) is also provided with an external interface (250) for fixing external components and providing power and control signals to the external components.

3. The rotating mechanism according to claim 2, characterized in that, The ball bearing (400) and its positioning cavity (241a) are disposed at unequal intervals within the first channel (400a) to shift the center of gravity of the rotating mechanism toward its center.

4. The rotating mechanism according to claim 2, characterized in that, The bottom of the first annular groove (120) and the second annular groove (240) are both arc-shaped and fit with the ball (400). The groove depth of the first annular groove (120) is less than the radius of the ball (400), the groove depth of the second annular groove (240) is greater than the radius of the ball (400), the groove width of the second annular groove (240) is equal to the diameter of the ball (400), and a stop (121) is provided at the position where the groove wall of the first annular groove (120) is wider than the groove wall of the second annular groove (240).

5. The rotating mechanism according to claim 2, characterized in that, The truncated cone (110) is hollow inside and forms a bearing cavity (150a) with an opening at the bottom. A bearing (150) is fixed inside the bearing cavity (150a) by a metal fixing piece (140). The metal fixing piece (140) is fixedly connected to the lower surface of the base (100). The hollow shaft (210) passes through the bearing (150).

6. The rotating mechanism according to claim 5, characterized in that, A washer (170) is fixed between the bearing (150) and the metal fixing plate (140) by a snap ring (160). The washer (170) is used to reduce the vibration when the rotating mechanism rotates and the external components work.

7. The rotating mechanism according to claim 2, characterized in that, The rotating assembly (200) is also provided with a signal receiver (260), which is electrically connected to the main controller.

8. The rotating mechanism according to claim 2, characterized in that, The upper surface of the housing (230) is also provided with a display touch panel (270), which is electrically connected to the main controller. The display touch panel (270) is used to control the rotating mechanism and external components and display status information.

9. The rotating mechanism according to claim 2, characterized in that, The lower surface of the base (100) is provided with rubber feet (190) to reduce wobbling.

10. A fan, characterized in that, Includes the rotating mechanism as described in any one of claims 2 to 9 and the fan housing inserted into the external interface (250).

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