Fan blade fixing structure

Abstract

The utility model discloses a fan blade fixing structure which is arranged at the end, away from a driving motor, of a rotating shaft, a mounting hole is formed in the end of the rotating shaft, a plurality of positioning holes are formed in the periphery of the rotating shaft, and the positioning holes penetrate through the mounting hole. An elastic telescopic piece is arranged in the positioning hole, extends out of the positioning hole and is inserted into an insertion groove formed in the inner surface of the fan blade nesting sleeve, so that the fan blade nesting sleeve is fixed to the rotating shaft to complete installation of the fan blade; a driving part is arranged in the mounting hole and used for driving the elastic telescopic part to extend out of the positioning hole or retract into the positioning hole, mounting and dismounting of the fan blades are conveniently achieved, meanwhile, the telescopic direction of the elastic telescopic part is perpendicular to the axial jumping direction of the fan blade nesting, the fan blade nesting can tightly press the elastic telescopic part in the rotating process, and the fan blades can be conveniently mounted and dismounted. And the connecting position is more stable, effective fixing of the fan blades is achieved, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan blade fixing structure. Background Art

[0002] The existing Chinese utility model with publication number CN207261304U discloses a fan blade fixing structure, which specifically includes a fan blade nest and a rotating shaft. The fan blade nest is sleeved on the rotating shaft, and an elastic limiter is provided on the inner wall of the fan blade nest, and a first groove is provided on the outer wall of the rotating shaft. The fan blade nest and the rotating shaft can be quickly installed by engaging the elastic limiter in the first groove.

[0003] However, in the above-mentioned case, when the rotating shaft drives the fan blade nest to rotate, the fan blade will produce axial jump under the action of centrifugal force, which can easily cause the limiting part to slide out of the sliding surface of the smooth transition of the outer wall of the rotating shaft, thereby causing the fan blade nest to disengage from the rotating shaft; therefore, it is impossible to effectively fix the fan blade, and there is a safety hazard in actual use. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a fan blade fixing structure to solve the technical problems mentioned in the prior art.

[0005] A fan blade fixing structure is provided at one end of a rotating shaft away from a driving motor, wherein the end of the rotating shaft is provided with a mounting hole, and the outer periphery of the rotating shaft is provided with a plurality of positioning holes, wherein the positioning holes penetrate the mounting hole;

[0006] An elastic telescopic member is provided in the positioning hole, and the elastic telescopic member extends out of the positioning hole and is inserted into a slot provided on the inner surface of the blade nest;

[0007] A driving member is provided in the mounting hole, and the driving member is used to drive the elastic telescopic member to extend out of the positioning hole or retract into the positioning hole.

[0008] Optionally, the elastic expansion member includes:

[0009] A limiting ring is embedded in the end of the positioning hole away from the mounting hole;

[0010] A fixing rod is inserted into the limiting ring, one end of the fixing rod is adapted to the slot, and the other end of the fixing rod extends into the positioning hole and is provided with a first connecting portion;

[0011] The first spring is sleeved on the outer circumference of the fixing rod, and the two ends of the first spring are respectively connected to the limiting ring and the opposite surface of the first connecting part.

[0012] Optionally, the driving member includes:

[0013] An extrusion rod is provided in the mounting hole, one end of the extrusion rod extends out of the mounting hole and is provided with a pressing portion, and the other end of the extrusion rod is provided with a second connecting portion;

[0014] When the second connecting portion cooperates with the first connecting portion, the fixing rod extends out of the positioning hole and is inserted into the slot.

[0015] Optionally, the first connecting portion and the second connecting portion are magnets of the same name.

[0016] Optionally, the mounting hole passes through the positioning hole and extends into the rotating shaft to form a material withdrawal groove.

[0017] Optionally, a third connecting portion is provided on the outer periphery of the rotating shaft, and the third connecting portion is located on a side of the second connecting portion away from the material withdrawal groove;

[0018] The third connecting portion and the first connecting portion are magnets of different names;

[0019] When the second connecting portion is located in the material withdrawal groove, the third connecting portion cooperates with the first connecting portion to retract the fixing rod into the positioning hole.

[0020] Optionally, the extrusion rod is threadedly installed in the mounting hole.

[0021] Optionally, the extrusion rod is slidably mounted in the mounting hole;

[0022] A limiting groove is provided on the inner wall of the mounting hole and on one side close to the pressing portion, and a limiting portion is provided on the outer periphery of the extrusion rod. The limiting portion is slidably connected to the limiting groove, and a second spring is provided on the side of the limiting portion away from the pressing portion. The second spring is sleeved on the outer periphery of the extrusion rod.

[0023] The beneficial effects produced by the utility model include:

[0024] The utility model provides a fan blade fixing structure, which facilitates the installation of an elastic telescopic part and a driving part by opening mounting holes and positioning holes that penetrate each other on the rotating shaft, so that the driving part drives the elastic telescopic part to extend out of the positioning hole and be inserted into the slot opened in the inner surface of the fan blade nest, so as to fix the fan blade nest on the rotating shaft to complete the installation of the fan blade; at the same time, the telescopic direction of the elastic telescopic part is perpendicular to the axial runout direction of the fan blade nest, so that the fan blade nest can press the elastic telescopic part during the rotation process, thereby ensuring that the connection is more stable, realizing effective fixation of the fan blade, and eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a fan blade fixing structure of the utility model;

[0026] Figure 2 For this utility model Figure 1 A schematic diagram of the structure in which the third connecting portion cooperates with the first connecting portion;

[0027] In the figure: 1. rotating shaft, 2. mounting hole, 3. positioning hole, 4. nested fan blades, 5. slot, 6. limiting ring, 7. fixing rod, 8. first connecting part, 9. first spring, 10. extrusion rod, 11. second connecting part, 12. material return groove, 13. third connecting part, 14. limiting groove, 15. limiting part, 16. second spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1 and 2 When the cam 4 is in the air, the cam 4 is in the air, and the cam 4 is in the air, so that the cam 4 can move freely, and the cam 4 can move freely, and the cam 4 can move freely, and the cam 4 can move freely.

[0030] Furthermore, the elastic telescopic member includes a limiting ring 6, a fixing rod 7 and a first spring 9. The limiting ring 6 is embedded in the end of the positioning hole 3 away from the mounting hole 2; the fixing rod 7 is inserted into the limiting ring 6, one end of the fixing rod 7 is adapted to the slot 5, and the other end of the fixing rod 7 extends into the positioning hole 3 and is provided with a first connecting portion 8; the first spring 9 is sleeved on the outer circumference of the fixing rod 7, and the two ends of the first spring 9 are respectively connected to the opposite surfaces of the limiting ring 6 and the first connecting portion 8. In the above, the driving member includes an extrusion rod 10, which is provided in the mounting hole 2, one end of the extrusion rod 10 extends to the outside of the mounting hole 2 and is provided with a pressing portion, and the other end of the extrusion rod 10 is provided with a second connecting portion 11; when the second connecting portion 11 cooperates with the first connecting portion 8, the fixing rod 7 extends out of the positioning hole 3 and is inserted into the slot 5. Specifically, the first connecting part 8 and the second connecting part 11 are magnets of the same name, and the pressing part drives the extrusion rod 10 to telescope and move in the mounting hole 2. When the second connecting part 11 slides to the end of the positioning hole 3 and repels the first connecting part 8, the fixing rod 7 is pushed out of the positioning hole 3 and inserted into the slot 5 of the fan blade nesting 4 to achieve the installation of the fan blade. At this time, the first spring 9 is in a compressed state; when the second connecting part 11 slides to be offset from the end of the positioning hole 3, the fixing rod 7 is disengaged from the slot 5 under the action of the elastic restoring force of the first spring 9, thereby achieving the disassembly of the fan blade.

[0031] In the above, the connection between the fixing rod 7 and the slot 5 is set to a hammer-shaped structure, which makes it easy to align the fixing rod 7 along the tapered surface of the slot 5 and insert it into the slot 5 to achieve the positioning installation of the fixing rod 7.

[0032] Furthermore, the mounting hole 2 passes through the positioning hole 3 and extends into the rotating shaft 1 to form a material withdrawal groove 12, so that the extrusion rod 10 extends into the material withdrawal groove 12, ensuring that the second connection part 11 is staggered with the positioning hole 3. In the above, a third connection part 13 is provided on the outer periphery of the rotating shaft 1, and the third connection part 13 is located on the side of the second connection part 11 away from the material withdrawal groove 12; the third connection part 13 and the first connection part 8 are magnets of opposite names, and when the second connection part 11 is located in the material withdrawal groove 12, the third connection part 13 cooperates with the first connection part 8 to retract the fixing rod 7 into the positioning hole 3. Specifically, when the extrusion rod 10 extends into the material withdrawal groove 12, the third connection part 13 is moved to the end of the positioning hole 3 and is attracted to the first connection part 8, thereby ensuring that the fixing rod 7 can be effectively retracted into the positioning hole 3, thereby realizing the disassembly of the fan blade.

[0033] In the above embodiment, the extrusion rod 10 is threadedly installed in the mounting hole 2 , and the extrusion rod 10 is driven to telescopically move by rotating the pressing portion, thereby ensuring the structural stability of the extrusion rod 10 .

[0034] In the alternative embodiment described above, the extrusion rod 10 is slidably mounted within the mounting hole 2. A limiting groove 14 is provided on the inner wall of the mounting hole 2, near the pressing portion, extending in all directions. A limiting portion 15 is provided on the outer periphery of the extrusion rod 10, slidably connected to the limiting groove 14. A second spring 16 is provided on the side of the limiting portion 15 away from the pressing portion, and is sleeved on the outer periphery of the extrusion rod 10. Pressing the pressing portion drives the extrusion rod 10 to extend and retract, facilitating rapid installation and removal of the fan blades. The second spring 16 also provides tension to ensure the structural stability of the extrusion rod 10.

Claims

1. A fan blade fixing structure, arranged at the end of the rotating shaft (1) away from the driving motor, characterized in that: The end of the rotating shaft (1) is provided with a mounting hole (2), and the outer periphery of the rotating shaft (1) is provided with a plurality of positioning holes (3), and the positioning holes (3) pass through the mounting hole (2); An elastic telescopic member is provided in the positioning hole (3), and the elastic telescopic member extends out of the positioning hole (3) and is inserted into a slot (5) provided on the inner surface of the fan blade nest (4); A driving member is provided in the mounting hole (2), and the driving member is used to drive the elastic telescopic member to extend out of the positioning hole (3) or retract into the positioning hole (3).

2. A fan blade fixing structure according to claim 1, characterized in that: The elastic expansion member comprises: A limiting ring (6) is embedded in the end of the positioning hole (3) away from the mounting hole (2); A fixing rod (7) is inserted into the limiting ring (6), one end of the fixing rod (7) is adapted to the slot (5), and the other end of the fixing rod (7) extends into the positioning hole (3) and is provided with a first connecting portion (8); The first spring (9) is sleeved on the outer periphery of the fixing rod (7), and the two ends of the first spring (9) are respectively connected to the opposite surfaces of the limiting ring (6) and the first connecting portion (8).

3. A fan blade fixing structure according to claim 2, characterized in that: The driving member includes: An extrusion rod (10) is arranged in the mounting hole (2), one end of the extrusion rod (10) extends to the outside of the mounting hole (2) and is provided with a pressing portion, and the other end of the extrusion rod (10) is provided with a second connecting portion (11); When the second connecting portion (11) and the first connecting portion (8) cooperate with each other, the fixing rod (7) extends out of the positioning hole (3) and is inserted into the slot (5).

4. The fan blade fixing structure according to claim 3, characterized in that: The first connecting portion (8) and the second connecting portion (11) are magnets of the same name.

5. The fan blade fixing structure according to claim 3, characterized in that: The mounting hole (2) passes through the positioning hole (3) and extends into the rotating shaft (1) to form a material withdrawal groove (12).

6. The fan blade fixing structure according to claim 5, characterized in that: A third connecting portion (13) is provided on the outer periphery of the rotating shaft (1), and the third connecting portion (13) is located on a side of the second connecting portion (11) away from the material withdrawal groove (12); The third connecting portion (13) and the first connecting portion (8) are magnets of different names; When the second connecting portion (11) is located in the material withdrawal groove (12), the third connecting portion (13) cooperates with the first connecting portion (8) to retract the fixing rod (7) into the positioning hole (3).

7. The fan blade fixing structure according to claim 3, characterized in that: The extrusion rod (10) is threadedly mounted in the mounting hole (2).

8. The fan blade fixing structure according to claim 3, characterized in that: The extrusion rod (10) is slidably mounted in the mounting hole (2); A limiting groove (14) is provided on the inner wall of the mounting hole (2) and on a side close to the pressing portion, and is extended in all directions. A limiting portion (15) is provided on the outer periphery of the extrusion rod (10). The limiting portion (15) is slidably connected to the limiting groove (14). A second spring (16) is provided on the side of the limiting portion (15) away from the pressing portion, and the second spring (16) is sleeved on the outer periphery of the extrusion rod (10).

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