A fan up-and-down oscillating structure using a torsion spring and a coil spring

Abstract

The application relates to the fan technical field and discloses a fan up-and-down shaking head structure using torsion springs and coil springs, which has a front shell, a rear shell and a gear box arranged in the front shell and clamped, an up-and-down gear box lower shell and an up-and-down gear box upper shell and a hardware support base assembly which are arranged in the front shell and the rear shell and are mutually connected, a step motor is arranged at one end of the up-and-down gear box upper shell, an upper small tooth is fixedly connected to the output end of the step motor, coil springs for assisting the shaking head, upper double-stage teeth and upper large teeth for driving are arranged between the up-and-down gear box lower shell and the up-and-down gear box upper shell; the application effectively prolongs the service life of the torsion springs and the coil springs by adding various structure combinations of the coil springs and the torsion springs in the gear structure, and the up-and-down shaking head failure caused by the coil spring breakage can be avoided after the fan is shaken for a long time.

Description

Technical Field

[0001] This invention belongs to the field of fan technology, and more specifically, relates to a fan oscillation structure using torsion springs and coil springs. Background Technology

[0002] Many fans on the market use a torsion spring and gear transmission structure when using an oscillation mechanism. This means that a torsion spring is added inside the gear, so that when the fan oscillates, the torsion spring deforms, which helps the gear rotate and reduces the load on the motor.

[0003] 1) Since the gears are rotated by the rotation of the motor, the torque of the motor is often insufficient to support the fan head to complete the entire up-and-down oscillation. In this case, a torsion spring is needed to provide thrust to the gears so that the fan head can complete the up-and-down oscillation.

[0004] 2) After long-term use, the single torsion spring structure is prone to breakage. This is because the head shakes by the deformation of the torsion spring itself, which means that the torsion spring has to bear a lot of force. This causes the torsion spring steel to easily exceed its fatigue limit, resulting in material failure and ultimately causing the head shake to malfunction. Summary of the Invention

[0005] The purpose of this invention is to provide a fan oscillation structure using torsion springs and coil springs. In addition to using the gear structure and torsion spring structure available on the market, a coil spring is added to the gear structure, which effectively improves the service life of the torsion spring and coil spring and avoids the oscillation failure caused by the coil spring breaking after long-term oscillation aging.

[0006] The technical solution adopted by the present invention is as follows: a fan oscillation structure using torsion spring and coil spring, applied to fan equipment, the fan oscillation structure has a front shell and a rear shell and gearbox that are snapped into the front shell. The front shell and the rear shell are provided with a lower upper gearbox shell and an upper upper gearbox shell and a hardware bracket base assembly that are connected to each other. A stepper motor is provided at one end of the upper upper gearbox shell, and the output end of the stepper motor is fixedly connected to an upper small tooth. An auxiliary oscillation coil spring, an upper double tooth and an upper large tooth for driving are provided between the lower upper gearbox shell and the upper upper gearbox shell.

[0007] A reset shaft is installed on one side of the hardware bracket base assembly. A torsion spring is installed at the slot corresponding to the upper large tooth on one side of the hardware bracket base assembly, and the torsion spring mounting head is installed on the reset shaft. A right fork arm and a left fork arm are rotatably connected on both sides of the front shell, and the right fork arm and the left fork arm are respectively installed on both sides of the rotating shaft of the upper large tooth.

[0008] Optionally, the upper double-stage tooth is rotatably connected to one end of the upper housing of the upper and lower gearboxes and meshes with the upper small tooth, the coil spring is installed at one end of the upper large tooth, and the upper large tooth rotates on one side of the upper housing of the upper and lower gearboxes and meshes with the upper double-stage tooth.

[0009] Optionally, the hardware bracket base assembly is located between the front and rear shells, and a positioning boss is fixedly connected to one side of the upper and lower gearbox upper shells, and the mounting head of the coil spring is mounted on the positioning boss.

[0010] Optionally, the right fork arm is rotatably connected to one side of the hardware bracket base assembly, and the left fork arm is rotatably connected to the other side of the hardware bracket base assembly. A first fork arm cover is installed on one side of the right fork arm pivot position, and a pressure block is installed on one side of the left fork arm pivot position. A second fork arm cover is provided at the other end of the pressure block, and the second fork arm cover is installed on one side of the left fork arm pivot position.

[0011] Optionally, a limiting boss is fixedly connected to the side wall of the mounting cylinder at one end of the lower housing of the upper and lower gearboxes, and the limiting boss is located on the right fork arm side.

[0012] Optionally, a short rod is provided at the bottom of the front shell, a DC seat is provided inside the short rod, a rotating shaft is provided on the DC seat, and internal teeth are provided on the side wall of the rotating shaft.

[0013] Optionally, the right fork arm and the left fork arm end faces are equipped with air duct rear covers, and the top of the air duct rear covers is equipped with a fan head.

[0014] Optionally, the gearbox includes a lower gearbox housing and an upper gearbox housing, and the upper large gear, upper double-stage gear, and upper small gear are all installed in the gearbox.

[0015] Optionally, a stepper motor mount is installed on the hardware bracket base assembly, and a longitudinal stepper motor is provided on the stepper motor mount. The output end of the longitudinal stepper motor is connected to the rotating shaft. An extension rod is provided at the bottom of the short rod, and a fan base is fixedly connected to the bottom of the extension rod.

[0016] Optionally, the extension rod includes two mounting cylinders, and the inner wall of the top of each mounting cylinder is provided with a threaded groove, and the bottom of each mounting cylinder is provided with an external threaded groove that matches the threaded groove.

[0017] The technical effects achieved by this invention are as follows:

[0018] (1) When the stepper motor is powered on, the upper small tooth drives the upper large tooth to rotate through the transmission. One end of the coil spring is fixed to the upper large tooth, and the other end is fixed to the upper and lower gear box housing. The coil spring is fixed by the upper large tooth and the gear box. When the upper large tooth rotates, the coil spring begins to twist, providing torque for the up and down oscillation. The right fork arm connected to the upper large tooth drives the fan head to oscillate. This structure uses the gear structure and torsion spring structure on the market, and also adds a coil spring in the gear structure. Therefore, it effectively improves the service life of the torsion spring and the coil spring, and avoids the failure of the up and down oscillation caused by the breakage of the coil spring after the fan has been oscillating for a long time.

[0019] (2) When the fan head oscillates up and down, not only the torsion spring is subjected to force, but also the coil spring. In this way, the weight of the entire fan head is distributed on the two parts. This means that when the fan oscillates up and down, the torsion spring and the coil spring work at the same time to help with the oscillation. Therefore, the service life of the torsion spring and the coil spring can be improved, the degree of aging can be reduced, and the oscillation failure can be avoided. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a fan oscillation structure using torsion springs and coil springs, installed on a fan according to the present invention.

[0022] Figure 2 This is a schematic diagram of a fan oscillation structure using a torsion spring and a coil spring according to the present invention.

[0023] Figure 3 For the present invention Figure 2 Mid-section view;

[0024] Figure 4 This is a schematic diagram of the internal structure of the gearbox of the present invention;

[0025] Figure 5 For the present invention Figure 2 Another cross-sectional structural diagram;

[0026] Figure 6 This is a schematic diagram of the installation position structure of the limiting boss of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation structure of the hardware bracket base assembly of the present invention;

[0028] Figure 8 This is an exploded view of the front and rear shells of the present invention;

[0029] Figure 9 This is an exploded view showing the installation of the torsion spring of the present invention;

[0030] Figure 10 This is a schematic diagram of the installation structure of the rear cover of the air duct of the present invention;

[0031] Figure 11 This is a schematic diagram of the overall structure of the fan of the present invention.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Upper large gear; 2. Coil spring; 3. Upper double-stage gear; 4. Lower housing of upper and lower gearboxes; 5. Upper housing of upper and lower gearboxes; 6. Upper small gear; 7. Stepper motor; 8. Hardware bracket base assembly; 9. Reset shaft; 10. Torsion spring; 11. First fork arm cover; 12. Right fork arm; 13. Left fork arm; 14. Pressure block; 15. Second fork arm cover; 16. Front housing; 17. Rear housing; 18. Air duct rear cover; 19. Internal gear; 20. Rotating shaft; 21. DC socket; 22. Short rod; 23. Extended rod; 24. Fan base; 25. Fan head; 26. Positioning boss; 27. Limiting boss; 28. Gearbox. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-11This invention provides a fan oscillation structure using torsion springs and coil springs, applicable to fan equipment. The oscillation structure includes a front housing 16, a rear housing 17 snapped onto the front housing 16, and a gearbox 28. Between the front housing 16 and the rear housing 17 are mutually engaging lower gearbox housings 4 and upper gearbox housings 5, along with a hardware support base assembly 8. A stepper motor 7 is mounted at one end of the upper gearbox housing 5, and the output end of the stepper motor 7 is fixedly connected to an upper small gear 6. The installed stepper motor 7 can drive the upper small gear 6. To achieve rotation, a coil spring 2 for auxiliary oscillation, an upper double-stage gear 3 and an upper large gear 1 for driving are provided between the lower shell 4 and the upper shell 5 of the upper and lower gearboxes. The upper double-stage gear 3 is rotatably connected to one end of the upper shell 5 of the upper and lower gearboxes and meshes with the upper small gear 6. The coil spring 2 is installed at one end of the upper large gear 1. The upper large gear 1 rotates on one side of the upper shell 5 of the upper and lower gearboxes and meshes with the upper double-stage gear 3. When the upper small gear 6 rotates, it will drive the upper double-stage gear 3 and the upper large gear 1 that are meshed with it to rotate. During the rotation of the upper large gear 1, the coil spring 2 will be used.

[0036] When the coil spring 2 is used in the fan's up-and-down oscillation structure:

[0037] Stepper motor 7 is connected to the small tooth 6 and meshes with the upper double tooth 3 and the upper large tooth 1 to form a transmission relationship. The right fork arm 12 is fixed to the upper large tooth 1. When the upper large tooth 1 rotates, it drives the right fork arm 12 to move, that is, to shake up and down.

[0038] The working principle of the coil spring 2 is as follows: When the stepper motor 7 is powered on, the upper small tooth 6 drives the upper large tooth 1 to rotate through the transmission. One end of the coil spring 2 is fixed to the upper large tooth 1, and the other end is fixedly connected to the positioning boss 26 on the upper shell 5 of the upper and lower gearboxes through its mounting head. The coil spring 2 is fixed by the upper large tooth 1 and the gearbox 28. When the upper large tooth 1 rotates, the coil spring 2 begins to twist, providing torque for the up and down oscillation. The right fork arm 12 connected to the upper large tooth 1 drives the fan head 25 to oscillate.

[0039] A reset shaft 9 is installed on one side of the hardware bracket base assembly 8. A torsion spring 10 is installed on the slot corresponding to the upper large tooth 1 on one side of the hardware bracket base assembly 8, and the mounting head of the torsion spring 10 is installed on the reset shaft 9. The front shell 16 is rotatably connected to the right fork arm 12 and the left fork arm 13, and the right fork arm 12 and the left fork arm 13 are respectively installed on both sides of the rotating shaft of the upper large tooth 1.

[0040] When the torsion spring 10 is used in the fan's up-and-down oscillation structure:

[0041] 1. The torsion spring 10 is fixed to the hardware bracket base assembly 8 from the top and bottom of the oscillating gearbox 28. The reset shaft 9 is also fixed to the hardware bracket base assembly 8, and the torsion spring 10 is fixed to the reset shaft 9. At the same time, the left fork arm 13 is connected to one end of the torsion spring 10. Specifically, the torsion spring 10 is fitted onto the reset shaft 9, one of its torsion arms is fixed to the reset shaft 9, and the other torsion arm is connected to the left fork arm 13.

[0042] The working principle of the torsion spring 10 is as follows: when the fan head 25 swings downward, the left fork arm 13 rotates around the reset shaft 9, applying torque to the torsion spring 10 to tighten and store energy; when the fan head 25 needs to reset upward, the torsion spring 10 releases energy and provides auxiliary torque to help the left fork arm 13 rotate upward, thereby reducing the load on the stepper motor 7.

[0043] In some embodiments, see Figure 1 , Figure 4 The hardware bracket base assembly 8 is located between the front shell 16 and the rear shell 17. A positioning boss 26 is fixedly connected to one side of the upper shell 5 of the upper and lower gearboxes, and the mounting head of the coil spring 2 is mounted on the positioning boss 26. The coil spring 2 can be installed and positioned by using the installed positioning boss 26.

[0044] In some embodiments, see Figure 3 , Figure 5 The right fork arm 12 is rotatably connected to one side of the hardware bracket base assembly 8, and the left fork arm 13 is rotatably connected to the other side of the hardware bracket base assembly 8. A first fork arm cover 11 is installed on one side of the pivot position of the right fork arm 12, and a pressure block 14 is installed on one side of the pivot position of the left fork arm 13. A second fork arm cover 15 is provided on the other end of the pressure block 14. The second fork arm cover 15 is installed on one side of the pivot position of the left fork arm 13. The first fork arm cover 11 can block one end of the right fork arm 12, thereby blocking dust or other debris. It is also convenient to remove the first fork arm cover 11 for maintenance. Similarly, the second fork arm cover 15 has the same effect on the left fork arm 13.

[0045] In some embodiments, a limiting boss 27 is fixedly connected to the side wall of the mounting cylinder at one end of the lower housing 4 of the upper and lower gearboxes, and the limiting boss 27 is located on one side of the right fork arm 12. The limiting boss 27 can be used to limit the installation of the right fork arm 12, ensuring that the rotation of the right fork arm 12 is within a reasonable range.

[0046] In some embodiments, a short rod 22 is provided at the bottom of the front housing 16, and a DC seat 21 is provided inside the short rod 22. A rotating shaft 20 is provided on the DC seat 21, and an internal tooth 19 is provided on the side wall of the rotating shaft 20. The rotating shaft 20 can be driven to rotate by the internal tooth 19 using a longitudinal stepper motor 7. A duct rear cover 18 is installed on the end face of the right fork arm 12 and the left fork arm 13, and a fan head 25 is installed on the top of the duct rear cover 18. The installed duct rear cover 18 facilitates the secure installation of the fan head 25, and the fan head 25 contains a drive motor and fan blades.

[0047] In some embodiments, the gearbox 28 includes a lower gearbox shell 4 and an upper gearbox shell 5. The upper large gear 1, the upper double-stage gear 3, and the upper small gear 6 are all installed in the gearbox 28 to ensure that the upper large gear 1, the upper double-stage gear 3, and the upper small gear 6 can form an integral driving action inside the gearbox 28.

[0048] In some embodiments, a stepper motor mount is installed on the hardware bracket base assembly 8, and a longitudinal stepper motor 7 is provided on the stepper motor mount. The output end of the longitudinal stepper motor 7 is connected to the rotating shaft 20. An extension rod 23 is provided at the bottom of the short rod 22, and a fan base 24 is fixedly connected to the bottom of the extension rod 23. The extension rod 23 includes two mounting cylinders, and threaded grooves are provided on the inner walls of the top of the two mounting cylinders. External threaded grooves matching the threaded grooves are provided at the bottom of the two mounting cylinders. The fan base 24 can provide support, and a counterweight is installed inside the fan base 24. The extension rod 23 is spliced ​​by the two mounting cylinders using threaded grooves. Then, the short rod 22 is installed on the extension rod 23 for use.

[0049] The workflow and principle of this invention are as follows:

[0050] ① Steps for fan oscillation:

[0051] Stepper motor 7 is powered on → upper large gear 1 rotates → left fork arm 13 rotates → air duct rear cover 18 rotates → left fork arm 13 is driven → fan head 25 begins to oscillate.

[0052] ② The principle behind a fan oscillating from 90° to 0°:

[0053] When the stepper motor 7 is powered on, the upper small tooth 6 connected to it begins to rotate, simultaneously driving the upper double tooth 3 and the upper large tooth 1 that meshes with it. When the upper large tooth 1 rotates, the coil spring 2, which is positioned by the upper large tooth 1 and the upper and lower gearbox housing 5, will be tightened. The right fork arm 12, which is fixed by the upper large tooth 1, will rotate, simultaneously driving the air duct rear cover 18 to move together. Since the right fork arm 12 and the left fork arm 13 together fix the air duct rear cover 18, the left fork arm 13 will begin to rotate, causing the torsion spring 10 connected to the left fork arm 13 to begin to tighten. When the limiting boss of the upper large tooth 1 is restricted, the head shakes from 90° to 0°, ending the head shake action from 90° to 0°.

[0054] ③ The principle behind a fan's oscillation from 0° to 90°:

[0055] When the stepper motor 7 is powered on and reverses, the upper small tooth 6 connected to it begins to reverse, simultaneously driving the upper double-stage tooth 3 and the upper large tooth 1 meshing with it. When the upper large tooth 1 reverses, the coil spring 2, which is positioned by the upper large tooth 1 and the upper and lower gearbox housing 5, will relax. At the same time, the relaxation of the coil spring 2 will generate a rebound force, pulling the upper large tooth 1 to reverse, allowing the upper large tooth 1 to easily reverse. The right fork arm 12, which is fixed to the upper large tooth 1, will rotate, simultaneously driving the air duct rear cover 18 to move together. Since the right fork arm 12 and the left fork arm 13 are together fixing the air duct rear cover 18, the left fork arm 13 will begin to rotate, causing the torsion spring 10 connected to the left fork arm 13 to relax. The relaxation of the torsion spring 10 will generate a rebound force, driving the left fork arm 13 to rotate easily. When the limiting boss of the upper large tooth 1 is restricted, the head shaking reaches 90° from 0°, ending the head shaking action from 0° to 90°, and at the same time, the coil spring 2 and the torsion spring 10 return to their natural unforced state.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fan up-and-down tilting structure using a torsion spring and a coil spring, applied to a fan device, the fan up-and-down tilting structure having a front case (16) and a rear case (17) and a gear case (28) provided to be coupled to the front case (16), characterized in that, The upper and lower gear box lower shell (4) and the upper and lower gear box upper shell (5) and the hardware support base assembly (8) are arranged opposite to each other between the front shell (16) and the rear shell (17), one end of the upper and lower gear box upper shell (5) is provided with a stepping motor (7), and the output end of the stepping motor (7) is fixedly connected with an upper small tooth (6), and the upper and lower gear box lower shell (4) and the upper and lower gear box upper shell (5) are provided with a coil spring (2) for assisting the head shaking, an upper double-stage tooth (3) for driving and an upper large tooth (1). One side of the hardware support base assembly (8) is provided with a reset shaft (9), a torsional spring (10) is arranged at the slot corresponding to the upper large tooth (1) on one side of the hardware support base assembly (8), and the mounting head of the torsional spring (10) is mounted on the reset shaft (9), and the front shell (16) is rotatably connected with a right fork arm (12) and a left fork arm (13) on both sides, and the right fork arm (12) and the left fork arm (13) are respectively mounted on both sides of the rotating shaft of the upper large tooth (1).

2. The fan up-and-down swing structure using a torsion spring and a coil spring according to claim 1, wherein: The upper double-stage tooth (3) is rotatably connected at one end of the upper and lower gear box upper shell (5) and is engaged with the upper small tooth (6), the coil spring (2) is mounted at one end of the upper large tooth (1), and the upper large tooth (1) is rotatably arranged on one side of the upper and lower gear box upper shell (5) and is engaged with the upper double-stage tooth (3).

3. The fan tilting structure using a torsion spring and a coil spring according to claim 1, wherein: The hardware support base assembly (8) is located between the front shell (16) and the rear shell (17), one side of the upper and lower gear box upper shell (5) is fixedly connected with a positioning boss (26), and the mounting head of the coil spring (2) is mounted on the positioning boss (26).

4. The fan tilting structure using a torsion spring and a coil spring according to claim 1, wherein: The right fork arm (12) is rotatably connected on one side of the hardware support base assembly (8), the left fork arm (13) is rotatably connected on the other side of the hardware support base assembly (8), a first fork arm cover (11) is mounted on one side of the rotating shaft position of the right fork arm (12), a pressing block (14) is mounted on one side of the rotating shaft position of the left fork arm (13), and the other end of the pressing block (14) is provided with a second fork arm cover (15), and the second fork arm cover (15) is mounted on one side of the rotating shaft position of the left fork arm (13).

5. The fan up-and-down swing structure using a torsion spring and a coil spring according to claim 1, wherein: The mounting cylinder side wall of one end of the upper and lower gear box lower shell (4) is fixedly connected with a limiting boss (27), and the limiting boss (27) is located on one side of the right fork arm (12).

6. The fan tilting structure using a torsion spring and a coil spring according to claim 1, wherein: The bottom of the front shell (16) is provided with a short rod (22), the inside of the short rod (22) is provided with a DC seat (21), the DC seat (21) is provided with a rotating shaft (20), and the side wall of the rotating shaft (20) is provided with an internal tooth (19).

7. The fan tilting structure using a torsion spring and a coil spring according to claim 6, wherein: The right fork arm (12) and the left fork arm (13) are provided with an air duct rear cover (18) on the end face, and the air duct rear cover (18) is provided with a fan head (25) on the top.

8. The fan tilting structure using a torsion spring and a coil spring according to claim 6, wherein: The gear box (28) comprises the upper and lower gear box lower shell (4) and the upper and lower gear box upper shell (5), and the upper large tooth (1), the upper double-stage tooth (3) and the upper small tooth (6) are all mounted in the gear box (28).

9. The fan tilting structure using a torsion spring and a coil spring according to claim 7, wherein: The five hardware support base assembly (8) is provided with a stepping motor seat, and a longitudinal stepping motor (7) is arranged on the stepping motor seat, and the output end of the longitudinal stepping motor (7) is connected with a rotating shaft (20), and the bottom of the short rod (22) is provided with an extension rod (23), and the bottom of the extension rod (23) is fixedly connected with a fan base (24).

10. The fan tilting structure using a torsion spring and a coil spring according to claim 9, wherein: The extension rod (23) comprises two mounting barrels, and the inner walls of the top portions of the two mounting barrels are each provided with a threaded groove, and the bottoms of the two mounting barrels are each provided with an outer threaded groove matched with the threaded groove.

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