Novel balance column structure

Abstract

The invention discloses a novel balance column structure which comprises an end ring, a plurality of sets of balance columns surround the surface of the end ring, a set of fan blades are arranged between every two sets of balance columns, the fan blades are perpendicular to the plane of the end ring, a plurality of sets of fan blades surround the plane of the end ring, and the balance columns are sleeved with balance gaskets. The balance column comprises a base body connected with the end ring and a column body integrally formed and arranged at the top of the base body, the two sets of expansion parts expand towards the two sides, the distance between the tops of the two sets of expansion parts is larger than an inner hole of the balance gasket, and then the balance gasket can be locked on the balance column; according to the balance column structure, original axial impact force is changed into radial force, the effect of locking the balance column is achieved, and the risk that the magnetic steel is damaged due to vibration force is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a novel balancing column structure. Background Art

[0002] In a permanent magnet motor, the rotor is designed with inserted magnets, so the rotor end rings need to be cast separately. After the magnets are inserted, the rotor core and the end rings are assembled together to form a complete permanent magnet rotor. Since the magnets are fragile and the rotor core is made of metal, the two are installed with a clearance fit. However, in actual operation, if the rotor is subjected to a large axial force, the vibration generated may damage the magnets, thereby affecting the overall performance of the motor. The balance column in the prior art will deform and tighten when subjected to axial impact force. However, during this process, the inside of the rotor core will also be subjected to a certain degree of impact force. For this rotor structure with magnets inserted inside, this impact force is very likely to damage the magnets, thereby affecting the performance of the motor. Summary of the invention

[0003] The present invention aims at the deficiencies in the prior art and provides the following technical solutions:

[0004] A novel balancing column structure comprises an end ring, wherein the surface of the end ring is surrounded by multiple groups of balancing columns, a group of fan blades is arranged between every two groups of the balancing columns, the fan blades are perpendicular to the plane of the end ring and are surrounded by several groups, a balancing gasket is sleeved on the balancing column, the balancing column comprises a base connected to the end ring and an integrally formed column arranged on the top of the base, an oblique groove toward the center of the end ring is opened on the column so that the column forms two groups of expansion parts, and external force drives the two groups of expansion parts to expand in directions away from each other, and after the two groups of expansion parts are expanded, the distance between their tops is greater than the inner hole diameter of the balancing gasket, thereby locking the balancing gasket on the balancing column.

[0005] As an improvement of the above technical solution, a shaft through hole is provided at the center of the end ring.

[0006] As an improvement of the above technical solution, a plurality of groups of bolt avoidance holes are arranged on the surface of the end ring and around the shaft through hole, the bolt avoidance holes correspond one-to-one with the positions and quantities of the fan blades, and the bolt avoidance holes are integrally formed with the fan blades.

[0007] As an improvement of the above technical solution, the fan blades, the balance column and the end ring are all integrally injection molded.

[0008] As an improvement of the above technical solution, a plurality of groups of mounting holes are provided on the surface of the end ring, and three groups of mounting holes are provided.

[0009] As an improvement of the above technical solution, the diameter of the column gradually decreases in the direction away from the base.

[0010] Beneficial effects of the present invention:

[0011] By expanding the two sets of expansion parts to both sides so that the distance between the tops of the two sets of expansion parts is larger than the inner hole of the balance gasket, the balance gasket can be locked on the balance column. The balance column structure changes the original axial impact force into radial force, thereby achieving the effect of locking the balance column and avoiding the risk of damage to the magnet due to vibration force. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the overall structure of the present invention;

[0013] Figure 2 It is a structural schematic diagram of the balance column of the present invention;

[0014] Figure 3 It is a schematic diagram of the structure of the connection between the balance column and the balance gasket of the present invention.

[0015] Figure numerals: 10, end ring; 11, shaft through hole; 20, bolt avoidance hole; 30, fan blade; 40, mounting hole; 50, balance column; 51, base; 52, column; 53, inclined groove; 54, balance gasket. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] A novel balance column structure, comprising an end ring 10, a shaft through hole 11 is arranged at the center of the end ring 10, a plurality of bolt avoidance holes 20 are arranged on the surface of the end ring 10 and around the shaft through hole 11, a plurality of balance columns 50 are arranged around the surface of the end ring 10, a group of fan blades 30 are arranged between every two groups of the balance columns 50, the fan blades 30 are perpendicular to the plane of the end ring 10 and are surrounded by a plurality of groups, the bolt avoidance holes 20 correspond to the positions and quantities of the fan blades 30 one by one, and the bolt avoidance holes 20 are integrally formed with the fan blades 30;

[0018] The shaft through hole 11 is located at the center of the end ring 10 and is used to accommodate the motor shaft to ensure that the rotor can rotate smoothly. Multiple groups of balance columns 50 are arranged around the surface of the end ring 10 to balance the mass distribution of the rotor. By accurately adjusting the number and position of the balance columns, the unbalanced force generated by the rotor when rotating at high speed can be effectively reduced, thereby improving the stability and efficiency of the motor operation. The fan blades 30 are perpendicular to the plane of the end ring 10 and are arranged around it. There is a group of fan blades between every two groups of balance columns 50. The main function of the fan blades is to provide heat dissipation effect, generate airflow when the motor is running, take away heat, and reduce the temperature of the motor, thereby improving the working efficiency and life of the motor. The bolt avoidance holes 20 are arranged around the shaft through hole 11. They allow bolts to pass through the end ring and firmly fix multiple punching sheets together to form a complete rotor core, and ensure that the normal operation of the fan blades 30 is not interfered with, and they can be accurately aligned during installation.

[0019] refer to Figure 2 as well as Figure 3 The balancing column 50 is sleeved with a balancing gasket 54. The balancing column 50 includes a base 51 connected to the end ring 10 and an integrally formed column 52 disposed on the top of the base 51. The column 52 is provided with an oblique groove 53 toward the center of the end ring so that the column 52 forms two groups of expansion parts. The two groups of expansion parts are expanded in directions away from each other by external force. After the two groups of expansion parts are expanded, the distance between the tops thereof is greater than the inner hole diameter of the balancing gasket, so that the balancing gasket is locked on the balancing column 50. The diameter of the column 52 gradually decreases in the direction away from the base 51.

[0020] A rivet gun is used to apply force to both sides in the inclined groove 53 in the middle of the balance column to form an expansion part. The inclined groove 53 in the middle destroys the integrity of the column 52, so that when the two groups of expansion parts are subjected to force, the balance column 50 is deformed mainly along the circumferential direction (i.e., radial direction). The structure of the column 52 that is small at the top and large at the bottom also affects the direction of the force. During the deformation process, the upper part of the column 52 is more likely to expand outward in the radial direction, because the relatively small diameter of the upper part makes it relatively weakly constrained during radial expansion. At the same time, the larger diameter part of the lower part provides basic support for deformation, ensuring the stability of the structure during radial expansion. The entire deformation process is mainly carried out along the radial direction. When the motor rotates, the balancing column 50 and the balancing gasket 54 rotate together. Since the balancing column 50 fixes the balancing gasket 54 by radial expansion, at this time, the balancing gasket 54 has an inward pressure on the balancing column 50. The component of this pressure in the circumferential direction is the radial force. In addition, during the rotation process, the radial deformation of the balancing column 50 is determined by its own structure and the shape fixation after the rivet gun applies force. This ensures that the balancing column 50 will not be subjected to axial force during rotation like the traditional structure and cause damage to the internal magnetic steel.

[0021] In one embodiment, the fan blades 30 , the balance column 50 and the end ring 10 are all integrally injection molded, thereby ensuring the stability of the motor structure.

[0022] In one embodiment, a plurality of mounting holes 40 are provided on the surface of the end ring 10 , and three groups of mounting holes 40 are provided. The end ring is installed by using the mounting holes 40 .

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A new type of balance column structure, characterized in that: The invention comprises an end ring (10), wherein the surface of the end ring (10) is surrounded by a plurality of groups of balancing columns (50), a group of fan blades (30) is arranged between every two groups of the balancing columns (50), the fan blades (30) are perpendicular to the plane of the end ring (10) and are surrounded by a plurality of groups, a balancing gasket (54) is sleeved on the balancing column (50), the balancing column (50) comprises a base (51) connected to the end ring (10) and a column (52) integrally formed and arranged on the top of the base (51), the column (52) is provided with an inclined groove (53) facing the center of the end ring so that the column (52) forms two groups of expansion parts, and the two groups of expansion parts are driven by external force to expand in directions away from each other, and after the two groups of the expansion parts are expanded, the distance between the tops thereof is greater than the inner hole diameter of the balancing gasket, thereby locking the balancing gasket on the balancing column (50).

2. A novel balancing column structure according to claim 1, characterized in that: A rotating shaft through hole (11) is provided at the center of the end ring (10).

3. A novel balancing column structure according to claim 2, characterized in that: A plurality of groups of bolt avoidance holes (20) are arranged on the surface of the end ring (10) and around the rotating shaft through hole (11); the bolt avoidance holes (20) correspond to the positions and numbers of the fan blades (30) one by one; and the bolt avoidance holes (20) and the fan blades (30) are integrally formed.

4. The novel balancing column structure according to claim 1 is characterized in that: The fan blade (30), the balance column (50) and the end ring (10) are all integrally injection-molded.

5. The novel balancing column structure according to claim 1 is characterized in that: The surface of the end ring (10) is also provided with a plurality of groups of mounting holes (40), and three groups of the mounting holes (40) are provided.

6. The novel balancing column structure according to claim 1 is characterized in that: The diameter of the column (52) gradually decreases in a direction away from the base (51).

Images