Impeller of micromotor

Abstract

The impeller comprises an installation cylinder and a plurality of fan blades evenly distributed in the circumferential direction of the installation cylinder, a motor shaft is sleeved with the installation cylinder, the installation cylinder and the motor shaft are connected in a locked mode through a lock sleeve, a plurality of cylinder pieces are arranged at the front end of the installation cylinder in the circumferential direction, an expansion joint is arranged between every two adjacent cylinder pieces, and the expansion joint is connected with the motor shaft in a locked mode. The lock sleeve is connected to the outside of the screw cylinder in a threaded mode, and when the lock sleeve is gradually screwed, the cylinder pieces are controlled to be tightly attached to the outer wall of the motor shaft. According to the utility model, the rotary lock sleeve is arranged, the lock sleeve gradually compresses and shrinks the cylinder sheet, so that the cylinder sheet is tightly attached to the outer wall of the motor shaft, the locking connection of the impeller and the motor shaft is realized, and compared with the traditional screw connection, the operation is more convenient, and the device is suitable for small-size installation environments such as micromotors; and compared with welding connection, disassembly and maintenance in the later period are facilitated, and practicability is higher.

Description

Technical Field

[0001] This utility model relates to the field of micro motor technology, and in particular to an impeller for a micro motor. Background Technology

[0002] Micro motors, also known as miniature motors, are motors with a diameter of less than 160mm or a rated power of less than 750mW. Due to their small size and light weight, micro motors are easy to install and use in limited spaces.

[0003] In existing technology, to improve the heat dissipation of the motor, a fan impeller is installed on the motor shaft inside the motor so that it rotates synchronously with the motor shaft when it is working, helping to quickly dissipate heat from inside the motor. Currently, the fan impeller and the motor shaft are usually connected by screws or welding. However, for small-sized micro motors, screw connections are difficult to operate, and welding connections are inconvenient for later disassembly and maintenance.

[0004] To address this issue, we propose a micro-motor impeller. Utility Model Content

[0005] The purpose of this invention is to provide an impeller for a micro motor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An impeller for a micro motor includes a mounting cylinder and a plurality of blades evenly distributed along the circumference of the mounting cylinder. The mounting cylinder is sleeved on the outside of the motor shaft, and the mounting cylinder and the motor shaft are locked together by a locking sleeve. The front end of the mounting cylinder is provided with a plurality of cylindrical plates along the circumference, and an expansion joint is provided between adjacent cylindrical plates. The plurality of cylindrical plates are enclosed to form a screw cylinder. The locking sleeve is threaded onto the outside of the screw cylinder, and as the locking sleeve is gradually tightened, it controls the cylindrical plates to be tightly attached to the outer wall of the motor shaft.

[0008] In a further embodiment, a flexible pad is connected to the inner wall of the cylindrical plate.

[0009] In a further embodiment, the inner wall of the cylindrical plate is also provided with a protruding limiting strip.

[0010] In a further embodiment, the outer wall of the motor shaft is provided with a plurality of grooves corresponding one-to-one with the limiting protrusions.

[0011] In a further embodiment, the inner edge of the front end of the cylindrical plate is provided with a protruding limiting arc.

[0012] In a further embodiment, an annular groove corresponding to the limiting convex arc is formed on the outer wall of the motor shaft.

[0013] In a further embodiment, a sealing ring is also filled between the tail end of the mounting cylinder and the motor shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model features a rotating locking sleeve that gradually presses against the contracting cylinder, causing the cylinder to fit tightly against the outer wall of the motor shaft, thus achieving a locking connection between the impeller and the motor shaft. Compared to traditional screw connections, this is more convenient to operate and suitable for small-sized installation environments such as micro motors. Furthermore, compared to welding connections, it facilitates later disassembly and maintenance, making it more practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the motor shaft and impeller mounting structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the semi-sectional structure of the motor shaft and impeller installation of this utility model;

[0018] Figure 3 This is a front view schematic diagram of the impeller structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the impeller structure after the locking sleeve is removed.

[0020] Figure 5 This is a schematic diagram of the impeller structure from the rear.

[0021] In the diagram: 1. Motor shaft; 11. Groove; 12. Ring groove; 2. Fan blade; 3. Locking sleeve; 4. Mounting cylinder; 5. Slab; 51. Expansion joint; 52. Flexible pad; 53. Limiting protrusion; 54. Limiting arc; 6. Sealing ring. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 An impeller for a micro motor includes a mounting cylinder 4 and several blades 2 evenly distributed around the circumference of the mounting cylinder 4. The mounting cylinder 4 is sleeved around the motor shaft 1, and the mounting cylinder 4 and the motor shaft 1 are locked together by a locking sleeve 3. Several cylindrical plates 5 are provided around the front end of the mounting cylinder 4, and an expansion joint 51 is provided between adjacent cylindrical plates 5. The several cylindrical plates 5 are arranged to form a screw cylinder. When the cylindrical plates 5 are not subjected to external pressure, there is a gap between them and the motor shaft 1, which allows the mounting cylinder 4 and the screw cylinder to move axially along the motor shaft 1 to adjust the installation position. The locking sleeve 3 is threaded onto the outside of the screw cylinder. The inner thread hole of the locking sleeve 3 is of unequal width, and the inner diameter of the thread hole gradually decreases from back to front. Therefore, when the locking sleeve 3 is gradually tightened, it will squeeze the cylindrical plates 5 to gradually press against the outer wall of the motor shaft 1, thereby realizing the locking installation between the impeller and the motor shaft 1.

[0026] Furthermore, to improve installation stability, a flexible pad 52 is connected to the inner wall of the cylinder 5. The flexible pad 52 is made of elastic rubber or silicone and is placed between the cylinder 5 and the outer wall of the motor shaft 1 to improve the stability of locking and reduce slippage.

[0027] The inner wall of the cylindrical plate 5 is also provided with a protruding limiting strip 53. The limiting strip 53 passes through the flexible pad 52. The outer wall of the motor shaft 1 is provided with a number of grooves 11 that correspond one-to-one with the limiting strip 53. When the cylindrical plate 5 is close to the outer wall of the motor shaft 1, the limiting strip 53 is just locked inside the groove 11, thereby limiting the installation cylinder 4 and preventing it from moving or deflecting in the circumferential direction.

[0028] The inner edge of the front end of the cylindrical plate 5 is provided with a protruding limiting arc 54. The outer wall of the motor shaft 1 is provided with an annular groove 12 corresponding to the limiting arc 54. When the cylindrical plate 5 is close to the outer wall of the motor shaft 1, the limiting arc 54 is just locked inside the annular groove 12, thereby limiting the mounting cylinder 4 and preventing it from moving or shifting along the axial direction.

[0029] A sealing ring 6 is also filled between the tail end of the mounting cylinder 4 and the motor shaft 1. The sealing ring 6 can be made of elastic rubber or silicone to fill the gap between the mounting cylinder 4 and the motor shaft 1, thereby further improving the stability of the connection between the mounting cylinder 4 and the motor shaft 1.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An impeller for a micro motor, comprising a mounting cylinder (4) and a plurality of blades (2) evenly distributed circumferentially along the mounting cylinder (4), characterized in that: The mounting cylinder (4) is sleeved on the outside of the motor shaft (1), and the mounting cylinder (4) and the motor shaft (1) are locked together by a locking sleeve (3). The front end of the mounting cylinder (4) is provided with several cylindrical pieces (5) along the circumferential direction. An expansion joint (51) is provided between adjacent cylindrical pieces (5), and the several cylindrical pieces (5) are enclosed to form a screw cylinder. The locking sleeve (3) is threaded onto the outside of the screw cylinder, and when the locking sleeve (3) is gradually tightened, the cylindrical pieces (5) are controlled to be tightly attached to the outer wall of the motor shaft (1).

2. The impeller of a micro motor according to claim 1, characterized in that: A flexible pad (52) is connected to the inner wall of the cylindrical plate (5).

3. The impeller of a micro motor according to claim 1, characterized in that: The inner wall of the cylindrical plate (5) is also provided with a protruding limiting strip (53).

4. The impeller of a micro motor according to claim 3, characterized in that: The outer wall of the motor shaft (1) is provided with several grooves (11) that correspond one-to-one with the limiting protrusions (53).

5. The impeller of a micro motor according to claim 1, characterized in that: The inner edge of the front end of the cylindrical plate (5) is provided with a protruding limiting arc (54).

6. The impeller of a micro motor according to claim 5, characterized in that: The outer wall of the motor shaft (1) is provided with an annular groove (12) corresponding to the limiting convex arc (54).

7. The impeller of a micro motor according to claim 1, characterized in that: A sealing ring (6) is also filled between the tail end of the mounting cylinder (4) and the motor shaft (1).

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