Wind wheel and motor shaft integrated injection molding structure

Abstract

The utility model relates to the technical field of motor assembly, and discloses a wind wheel and motor shaft integrated injection molding structure which comprises a wind wheel body and a motor shaft connected to the wind wheel body, an assembly cavity is formed in the end of the wind wheel body, and a limiting hole is formed in the center of the assembly cavity. At least one group of annular guide grooves are formed in the outer circumferential surface of the motor shaft, the limiting hole is in clearance fit with the motor shaft, and the distance between the end part of the motor shaft and the annular guide grooves is smaller than the depth of the limiting hole; the motor shaft with the annular guide groove and the wind wheel body are fixed in the limiting hole in an integrated injection molding mode, and the end of the motor shaft abuts against the inner wall of the limiting hole.

Description

Technical Field

[0001] The utility model relates to the technical field of motor assembly, in particular to an integral injection molding structure of a wind wheel and a motor shaft. Background Art

[0002] The existing wind wheel mainly includes a wind wheel and a driving motor. When manufacturing the wind wheel, the wind wheel and the driving motor need to be manufactured separately first, and the wind wheel is installed in conjunction with the motor shaft, and the wind wheel is driven to rotate by the rotation of the motor shaft. It is well known that the blades rotate at high speed in the working state, and the high-speed rotating blades will be subject to a large air force. The stability of the connection between the wind wheel and the motor shaft is affected by the assembly accuracy. The existing motor shaft body is a smooth rod-shaped structure, and its connection with the wind wheel is poor. Especially under long-term operation, the connection between the wind wheel and the motor shaft is prone to fall off or breakage, which seriously affects the service life of the wind wheel. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an integral injection molding structure of a wind wheel and a motor shaft to increase the stability of the connection.

[0004] The technical solution of the utility model is: a wind wheel and motor shaft integrated injection molding structure, comprising a wind wheel body and a motor shaft connected to the wind wheel body, an assembly cavity is arranged at the end of the wind wheel body, a limiting hole is arranged at the center of the assembly cavity, at least one group of annular guide grooves are arranged on the outer circumferential surface of the motor shaft, the limiting hole and the motor shaft are clearance-matched, the distance between the end of the motor shaft and the annular guide groove is less than the depth of the limiting hole, the motor shaft with the annular guide groove and the wind wheel body are fixed in the limiting hole by integrated injection molding, and the end of the motor shaft abuts against the inner wall of the limiting hole.

[0005] It can be seen from the above scheme that the end of the motor shaft is inserted into the limiting hole to achieve connection with the wind wheel body, and the motor shaft is fixedly connected to the motor shaft by integral injection molding. The annular guide groove arranged on the shaft body of the motor shaft is used to increase the stability of the connection after the injection molding rubber flows in, so as to prevent the motor shaft from falling off the wind wheel body.

[0006] The wind wheel body includes a front cover, a rear seat and an impeller module connected between the front cover and the rear seat, the impeller module includes a plurality of blades formed in a ring array, an air inlet is provided at the end of the front cover, and the rear seat is recessed inwardly to provide the assembly cavity. It can be seen that after the motor shaft is fixedly connected to the impeller body, the motor shaft drives the impeller body to rotate, and the air inlet is used for air to enter.

[0007] The blades are arranged in an inclined manner, and an air outlet channel is provided between two adjacent groups of blades. It can be seen that the airflow enters the wind wheel through the air inlet, and is discharged from the air outlet channel between the blades after being accelerated by the wind wheel.

[0008] The end of the motor shaft is provided with a chamfer, which can be seen as the chamfer is used to prevent the wind wheel from being damaged when the motor shaft is inserted into the through hole.

[0009] The front end cover includes a straight tube portion and an outer edge portion, the outer edge portion is connected to the blade, and the outer diameter of the impeller module is equal to the outer diameter of the front end cover. It can be seen that the front end cover is used to guide the incoming air, which is convenient for reducing the resistance caused by the rotation of the wind wheel body and enhancing the structural strength of the wind wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a cross-sectional view of the utility model;

[0012] Figure 3 It is a schematic diagram of the structure of the wind wheel;

[0013] Figure 4 It is a structural schematic diagram of the utility model from another viewing angle. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0015] like Figures 1 to 4 As shown, the utility model is an integrated injection molding structure of a wind wheel and a motor shaft, comprising a wind wheel body 1 and a motor shaft body 2 connected to the wind wheel body 1, an assembly cavity 3 is provided at the end of the wind wheel body 1, a limiting hole 31 is provided at the center of the assembly cavity 3, at least one group of annular guide grooves 4 are provided on the outer circumferential surface of the motor shaft body 2, a chamfer 21 is provided at the end of the motor shaft body 2, the limiting hole 31 and the motor shaft body 2 are clearance-fitted, the distance between the end of the motor shaft body 2 and the annular guide groove 4 is less than the depth of the limiting hole 31, the motor shaft body 2 with the annular guide groove 4 and the wind wheel body 1 are fixed in the limiting hole 31 by integrated injection molding, and the end of the motor shaft body 2 abuts against the inner wall of the limiting hole 31. In this embodiment, two groups of annular guide grooves 4 are arranged on the outer circumferential surface of the motor shaft 2, and the molten plastic flows into the motor shaft 2 and the limiting hole 31 to realize one-piece injection molding. The molten plastic flows into the annular guide groove 4 of the limiting hole 31, making the connection tighter.

[0016] The wind wheel body 1 includes a front cover 11, a rear seat 12, and an impeller module connected between the front cover 11 and the rear seat 12. The impeller module includes a plurality of blades 13 formed in a ring array. The end of the front cover 11 is provided with an air inlet 10. The rear seat 12 is recessed inwardly to provide the assembly cavity 3. The blades 13 are arranged in an inclined manner. An air outlet channel 14 is provided between two adjacent groups of the blades 13. The front cover 11 includes a straight tube portion 111 and an outer edge portion 112. The outer edge portion 112 is connected to the blades 13. The outer diameter of the impeller module is equal to the outer diameter of the front cover 11. The number of the blades 13 is usually set to an even number to facilitate dynamic balance adjustment. In this embodiment, the number of blades 13 is 10, and the front end cover 11 and the rear end seat 12 are both coaxial with the motor shaft 2, so as to avoid imbalance caused by high-speed rotation of the motor shaft 2 after being inserted and installed in the assembly cavity 3. Chamfers 21 are provided at both ends of the motor shaft 2 to avoid damage to the inner wall of the wind wheel body 1 due to friction.

[0017] The working process of the utility model is as follows: the motor shaft 2 is aligned with the mounting hole 31 and then inserted into the wind wheel body 1, and the molten plastic is injected between the motor shaft 2 and the wind wheel body 1, so that it flows between the annular guide groove 4 and the mounting hole 31, thereby realizing the integral injection molding of the motor shaft 2 and the wind wheel body 1.

[0018] Finally, it should be emphasized that the above is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wind wheel and motor shaft integrally injection molded structure, comprising a wind wheel body (1) and a motor shaft body (2) connected to the wind wheel body (1), characterized in that: An assembly cavity (3) is provided at the end of the wind wheel body (1), a limiting hole (31) is provided at the center of the assembly cavity (3), at least one group of annular guide grooves (4) are provided on the outer circumferential surface of the motor shaft body (2), the limiting hole (31) and the motor shaft body (2) are clearance-matched, the distance between the end of the motor shaft body (2) and the annular guide groove (4) is smaller than the depth of the limiting hole (31), the motor shaft body (2) with the annular guide groove (4) and the wind wheel body (1) are fixed in the limiting hole (31) by integral injection molding, and the end of the motor shaft body (2) abuts against the inner wall of the limiting hole (31).

2. The integral injection molding structure of a wind wheel and a motor shaft according to claim 1, characterized in that: The wind wheel body (1) comprises a front end cover (11), a rear end seat (12), and an impeller module connected between the front end cover (11) and the rear end seat (12), the impeller module comprising a plurality of blades (13) formed in a ring-shaped array, an air inlet (10) being provided at the end of the front end cover (11), and the rear end seat (12) being recessed inwardly and provided with the assembly cavity (3).

3. The integral injection molding structure of a wind wheel and a motor shaft according to claim 2, characterized in that: The blades (13) are arranged in an inclined manner, and an air outlet channel (14) is provided between two adjacent groups of blades (13).

4. The integral injection molding structure of a wind wheel and a motor shaft according to claim 1, characterized in that: The end of the motor shaft (2) is provided with a chamfer (21).

5. The integral injection molding structure of a wind wheel and a motor shaft according to claim 2, characterized in that: The front end cover (11) comprises a straight tube portion (111) and an outer edge portion (112), the outer edge portion (112) is connected to the blade (13), and the outer diameter of the impeller module is equal to the outer diameter of the front end cover (11).

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