Fan motor connecting structure

Abstract

The utility model discloses a fan motor connecting structure which comprises a motor body, a driving rotating shaft is arranged on one side of the motor body, a first key groove is concavely formed in one side of the driving rotating shaft, a rotating seat is arranged on the driving rotating shaft in a sleeved mode, and a second key groove corresponding to the first key groove is concavely formed in the inner side of the rotating seat. The device is characterized in that an insertion groove is formed in one side of the first key groove in a concave mode, a guide flange is arranged on one side of the connection key, the guide flange is movably inserted into the insertion groove in a matched mode, a screw hole communicated with the insertion groove is formed in the upper end of the driving rotating shaft, and the connection key is inserted into the screw hole in a matched mode. A connecting screw is arranged in the screw hole in a threaded fit mode, a limiting guide groove communicated with the screw hole is concavely formed in the upper side of the guide flange, a guide inclined face used for being connected with the connecting screw in an abutting mode is arranged on one side of the limiting guide groove, and when the connecting screw abuts against the guide inclined face, the connecting key and the driving rotating shaft can be driven to move relatively away from each other.

Description

Technical Field

[0001] This utility model specifically relates to a fan motor connection structure. Background Technology

[0002] The fan's drive motor, as the power source for driving the fan blades, is a crucial component during use. Currently, the motor shaft is typically connected to the fan via a key connection. This connection method requires the outer diameter of the motor shaft to be equal to the inner diameter of the connecting seat fitted onto the motor shaft. However, due to machining errors, a gap is often left between the motor shaft and the inner side of the connecting seat. Fans installed on the connecting seat due to this gap are prone to eccentricity, resulting in significant fan wobbling when the motor rotates, which can affect usage and even cause damage.

[0003] Therefore, a fan motor connection structure needs to be provided to improve the above-mentioned problems. Utility Model Content

[0004] In view of the defects of the existing technology, the technical problem to be solved by this utility model is to provide a fan motor connection structure.

[0005] A fan motor connection structure includes a motor body, a drive shaft on one side of the motor body, a first keyway recessed on one side of the drive shaft, a rotating seat sleeved on the drive shaft, a second keyway recessed on the inner side of the rotating seat corresponding to the first keyway, a connecting key being fitted between the first keyway and the second keyway, a slot recessed on one side of the first keyway, a guide flange on one side of the connecting key being movably inserted into the slot, a screw hole communicating with the slot on the upper end of the drive shaft, a connecting screw being threaded into the screw hole, a limiting guide groove communicating with the screw hole on the upper side of the guide flange, and a guide inclined surface on one side of the limiting guide groove for abutting against the connecting screw. When the connecting screw abuts against the guide inclined surface, it can drive the connecting key to move away from the drive shaft.

[0006] In one embodiment, the connecting key has a plurality of protrusions evenly distributed vertically on the side opposite to the guide flange, and a plurality of slots are evenly distributed vertically on one side of the second keyway, with the protrusions correspondingly engaged in the slots.

[0007] In one embodiment, the protrusion is in the shape of an arc-shaped protrusion, a rectangular protrusion, a triangular protrusion, or a trapezoidal protrusion.

[0008] In one embodiment, the lower end of the connecting screw is fitted with an arc-shaped sleeve, which abuts against the guide bevel surface.

[0009] In one embodiment, a mounting plate is fixedly provided on the rotating seat, and a plurality of mounting holes are provided on the mounting plate at intervals along the circumference.

[0010] In one embodiment, the connecting key is detachably connected to gaskets on both sides in its width direction.

[0011] In summary, the advantages of this utility model over the prior art are:

[0012] The connecting key of this utility model is inserted into the first keyway of the drive shaft via a guide flange. After the connecting key and the drive shaft are installed, the rotating seat is fitted onto the drive shaft. At this time, the connecting key is partially fitted into the second keyway of the rotating seat. A clearance is left between the first keyway and the second keyway for the connecting key to move back and forth along the depth of the slot. Then, the connecting screw is installed in the screw hole, so that the connecting screw moves downward along the screw hole and is inserted into the limiting guide groove of the guide flange. As it moves downward, it continuously presses against the guide inclined surface of the limiting guide groove, causing the connecting key to shift and press tightly against the side wall of the second keyway in the rotating seat. This effectively eliminates the gap caused by machining errors and avoids the problem of damage caused by long-term eccentric shaking. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of a fan motor connection structure in one embodiment of the present invention;

[0014] Figure 2 As one embodiment of this utility model Figure 1 Enlarged view of point A;

[0015] Figure 3 This is an exploded view of a fan motor connection structure in one embodiment of the present invention;

[0016] Figure 4 This is a perspective view of a fan motor connection structure in one embodiment of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] like Figures 1 to 4The present invention preferably provides a fan motor connection structure, including a motor body 1, a drive shaft 2 on one side of the motor body 1, a first keyway 3 recessed on one side of the drive shaft 2, a rotating seat 4 sleeved on the drive shaft 2, a second keyway 5 recessed on the inner side of the rotating seat 4 corresponding to the first keyway 3, a connecting key 6 fitted between the first keyway 3 and the second keyway 5, a slot 7 recessed on one side of the first keyway 3, a guide flange 8 on one side of the connecting key 6, the guide flange 8 being movably inserted into the slot 7, a screw hole 9 communicating with the slot 7 on the upper end of the drive shaft 2, a connecting screw 10 threadedly fitted in the screw hole 9, a limiting guide groove 11 recessed on the upper side of the guide flange 8 communicating with the screw hole 9, and a guide inclined surface 12 on one side of the limiting guide groove 11 for abutting against the connecting screw 10. When the connecting screw 10 abuts against the guide inclined surface 12, it can drive the connecting key 6 to move away from the drive shaft 2.

[0019] Specifically, the connecting key is inserted into the first keyway of the drive shaft via a guide flange. After the connecting key and the drive shaft are installed, the rotating seat is fitted onto the drive shaft. At this time, the connecting key partially fits into the second keyway of the rotating seat. A clearance is left between the first and second keyways for the connecting key to reciprocate along the depth of the slot. Then, the connecting screw is installed in the screw hole, so that the connecting screw moves downward along the screw hole and inserts into the limiting guide groove of the guide flange. As it moves downward, it continuously presses against the guide slope of the limiting guide groove, causing the connecting key and the drive shaft to move away from each other. As a result, the connecting key presses tightly against the side wall of the second keyway in the rotating seat, while the drive shaft presses tightly against the inner side wall of the rotating seat. The tight fit between the drive shaft and the connecting key effectively eliminates the gap caused by machining errors and avoids damage caused by long-term eccentric shaking.

[0020] Furthermore, the connecting key 6 has several protrusions 13 evenly distributed vertically on the side opposite to the guide flange 8, and several slots 14 are evenly distributed vertically on one side of the second keyway 5, with the protrusions 13 correspondingly engaged in the slots 14.

[0021] Specifically, when the connecting screw presses against the inclined surface of the limiting guide groove, causing the connecting key and the drive shaft to move away from each other, the protrusion of the connecting key can be displaced and engaged in the slot of the second keyway, thereby limiting the up and down movement of the rotating seat relative to the drive shaft, realizing the complete fixed installation of the rotating seat relative to the drive shaft. The installation structure is simple and firm.

[0022] Furthermore, the protrusion 13 is in the shape of an arc-shaped protrusion, a rectangular protrusion, a triangular protrusion, or a trapezoidal protrusion.

[0023] Furthermore, the lower end of the connecting screw 10 is fitted with an arc-shaped sleeve 15 through an interference fit, and the arc-shaped sleeve 15 abuts against the guide slope 12. The arc surface of the sleeve abuts against the guide slope, facilitating the pressure on the guide slope to guide the key's displacement. The arc-shaped sleeve is also removable and replaceable, making it convenient for user maintenance.

[0024] Furthermore, a mounting plate 16 is fixedly provided on the rotating base 4, and a plurality of mounting holes 17 are provided on the mounting plate 16 at intervals along the circumference. This facilitates connection with external fan blades and other components.

[0025] Furthermore, the connecting key 6 is detachably connected to gaskets on both sides in its width direction. This allows for the effective elimination of gaps by adding gaskets.

[0026] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fan motor connection structure, comprising a motor body (1), wherein a drive shaft (2) is provided on one side of the motor body (1), a first keyway (3) is recessed on one side of the drive shaft (2), a rotating seat (4) is sleeved on the drive shaft (2), a second keyway (5) is recessed on the inner side of the rotating seat (4) corresponding to the first keyway (3), and a connecting key (6) is fitted between the first keyway (3) and the second keyway (5), characterized in that: The first keyway (3) has a recessed slot (7) on one side, and the connecting key (6) has a guide flange (8) on one side. The guide flange (8) is movably inserted into the slot (7). The upper end of the drive shaft (2) has a screw hole (9) that communicates with the slot (7). The screw hole (9) is threaded with a connecting screw (10). The upper side of the guide flange (8) has a recessed limiting guide groove (11) that communicates with the screw hole (9). The limiting guide groove (11) has a guide slope (12) on one side for abutting against the connecting screw (10). When the connecting screw (10) presses against the guide slope (12), it can drive the connecting key (6) and the drive shaft (2) to move away from each other.

2. The fan motor connection structure according to claim 1, characterized in that: The connecting key (6) is provided with a number of protrusions (13) evenly distributed vertically on the side opposite to the guide flange (8). The second keyway (5) is provided with a number of recessed slots (14) evenly distributed vertically on one side. The protrusions (13) are correspondingly embedded and engaged in the slots (14).

3. The fan motor connection structure according to claim 2, characterized in that: The protrusion (13) is in the shape of an arc-shaped protrusion, a rectangular protrusion, a triangular protrusion, or a trapezoidal protrusion.

4. The fan motor connection structure according to claim 1, characterized in that: The lower end of the connecting screw (10) is fitted with an arc-shaped sleeve (15) with an interference fit, and the arc-shaped sleeve (15) abuts against the guide slope (12).

5. The fan motor connection structure according to claim 1, characterized in that: The rotating seat (4) is fixedly provided with a mounting plate (16), and the mounting plate (16) is provided with a plurality of mounting holes (17) at intervals along the circumference.

6. The fan motor connection structure according to claim 1, characterized in that: The connecting key (6) is detachably connected to gaskets on both sides in its width direction.

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