CN214480076U

CN214480076U - Rotor baffle fixing structure of motor

Info

Publication number: CN214480076U
Application number: CN202120566261.5U
Authority: CN
Inventors: 王松; 姜东岳; 张丽鹏
Original assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Current assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-10-22
Anticipated expiration: 2031-03-19

Abstract

The utility model relates to the technical field of electric machines, concretely relates to rotor baffle fixed knot of motor constructs, including the pivot, be fixed in the rotor in the pivot outside, and the rotor baffle that rotor axial both ends set up, rotor baffle is discoid, and central point is equipped with circular through-hole, a plurality of first fixed orificess have been seted up around circular through-hole on the rotor baffle, a plurality of second fixed orificess have been seted up on the both sides terminal surface of rotor respectively, rotor baffle and rotor are to merging through running through first fixed orifices is connected to the fastener interference fit of second fixed orificess. An object of the utility model is to provide an axle space occupies for a short time, low in production cost's rotor baffle fixed knot constructs.

Description

Rotor baffle fixing structure of motor

Technical Field

The utility model relates to the technical field of electric machines, concretely relates to rotor baffle fixed knot of motor constructs.

Background

The new energy automobile driving motor is high in rotating speed and large in starting acceleration, if the rotor baffle is not reliably fixed on the rotating shaft, the rotor baffle is easy to circumferentially slip and axially transmit, and the motor is deteriorated in dynamic balance and vibration noise is caused. The fixing mode of the current rotor baffle plate comprises the following 3 modes: the first scheme is the scheme of a baffle plate and a round nut, and the rotating shaft and the nut need to be threaded, so that the processing technology is complex and the cost is high; secondly, compared with the scheme 1, the scheme of the baffle plate and the steel pressure ring reduces thread processing, the cost is slightly low, but the requirement on shaft space is large; and thirdly, the direct baffle plate is large in interference, if an aluminum plate is selected, the reliability is low due to the thermal expansion coefficient, if stainless steel is selected, the cost is too high, and if #45 steel is selected, the electromagnetic performance is influenced due to magnetic leakage, so that the balance among the cost, the performance and the reliability is difficult to achieve. Under the limit of limited space size and cost, how to improve the reliability of the rotor baffle becomes an important research subject.

Disclosure of Invention

In order to solve the problem, an object of the utility model is to provide a rotor baffle fixed knot that axle space occupies for a short time, low in production cost constructs.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a rotor baffle fixed knot of motor constructs, includes the pivot, is fixed in the rotor in the pivot outside, and the rotor baffle that sets up at rotor axial both ends, rotor baffle is discoid, and central point is equipped with circular through-hole, a plurality of first fixed orificess have been seted up around circular through-hole on the rotor baffle, a plurality of second fixed orificess have been seted up on the both sides terminal surface of rotor respectively, rotor baffle and rotor are to merging through running through first fixed orificess and stretch into the fastener interference fit connection to the second fixed orificess.

Preferably, the fastener is a pin or a rivet. The pin or the rivet of the technical scheme is a standard component which is universal in machinery, and has the advantages of low price, easy acquisition, convenient operation and high reliability.

Preferably, one end of the fastener is formed with a boss for limiting the axial movement of the rotor baffle.

Preferably, the first fixing holes are uniformly distributed on the same circumference. This technical scheme contains the first fixed orifices of symmetric distribution on two at least same circumferences, and during the assembly, rotor baffle atress is even, can with the inseparable firm installation to the rotor of rotor terminal surface laminating.

Preferably, the rotor is provided with a V-shaped groove which is axially penetrated and used for containing the magnetic steel along the circumferential direction, the vertex of the V-shaped groove faces the center of the circle, and the second fixing hole is arranged corresponding to the radial inner side of the vertex.

Preferably, the rotor baffle is in interference fit with the rotating shaft.

The utility model adopts the above technical scheme following beneficial effect has at least: the rotor baffle is stably installed on the rotor through the interference fit of the first fixing hole, the second fixing hole and the fastener penetrating through the first fixing hole and extending into the second fixing hole, wherein the first fixing hole and the second fixing hole are respectively formed in the rotor baffle and the rotor, and the fastener is in interference fit with the hole wall, so that the rotor baffle is prevented from generating circumferential slippage and axial movement in the operation process of the motor, and the noise generated by the motor due to dynamic balance damage is avoided; meanwhile, the fastener in the technical scheme does not need to occupy a very small shaft space or only occupy a very small shaft space, threads do not need to be machined on the rotating shaft or the fastener, the machining process is simple, the production cost is low, and the influence of the thermal expansion coefficient and the electromagnetic performance of materials used by the rotor baffle on the operation effect of the motor does not need to be considered.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is an exploded view of a rotor baffle fixing structure according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a rotor baffle fixing structure according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a fastener according to an embodiment of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings.

It should be noted that the terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, the rotor baffle fixing structure provided in this embodiment is mainly applied to a driving motor of a new energy vehicle, and includes a rotating shaft 1, a rotor 4 fixed outside the rotating shaft, and rotor baffles 3 disposed at two axial ends of the rotor.

The rotor baffle is of a disc shape with the size being consistent with that of the end face of the rotor, a circular through hole for the rotating shaft to penetrate through is formed in the center of the rotor baffle, specifically, the size of the circular through hole is slightly smaller than that of the rotating shaft, so that the rotor baffle is connected with the rotating shaft in an interference fit mode, and circumferential slippage and axial movement of the rotor baffle in the motor running process can be limited preliminarily.

Furthermore, a plurality of first fixed orificess 5 have been seted up around circular through-hole on the rotor baffle, a plurality of second fixed orificess 7 have been seted up on the both sides terminal surface of rotor respectively, rotor baffle 3 cup joints in the pivot and closes with both sides rotor end surface respectively, wear to be equipped with fastener 2 in first, the second fixed orifices, fastener and pore wall interference fit to with the firm assembly of rotor baffle to rotor axial both ends. In the embodiment, the rotor baffle is stably installed on the rotor by the first fixing hole and the second fixing hole which are respectively arranged on the rotor baffle and the rotor, and the fastening piece which penetrates through the first fixing hole and extends into the second fixing hole is in interference fit with the hole wall, so that the rotor baffle is prevented from generating circumferential slippage and axial movement in the operation process of the motor, and the motor is prevented from generating noise due to dynamic balance damage; meanwhile, the fastener does not need to occupy a very small shaft space or only occupy a very small shaft space, threads do not need to be machined on the rotating shaft or the fastener, the machining process is simple, the production cost is low, and the influence of the thermal expansion coefficient and the electromagnetic performance of materials used by the rotor baffle on the operation effect of the motor does not need to be considered. In a preferred embodiment, the first fixing holes 5 are uniformly distributed on the same circumference; the rotor 4 is provided with a V-shaped groove 6 which is axially penetrated and used for containing magnetic steel, the vertex of the V-shaped groove faces the circle center, and the second fixing hole 7 is arranged corresponding to the radial inner side of the vertex. The first fixed orifices that contain symmetric distribution on two at least same circumferences in this embodiment, during the assembly, rotor baffle atress is even, can with the inseparable firm installation to the rotor of rotor terminal surface laminating.

In addition, the fastening element 2 is preferably a pin or a rivet, both of which are standard parts commonly used in machinery, and has the advantages of low price, easy acquisition, convenient operation and high reliability. The fastener contains a cylinder and is located the boss 21 of main part one end, the assembly back, boss 21 offsets with the relative lateral surface of two rotor baffles, when avoiding the high-speed operation of motor, the fastening position is not hard up, appears the rotor baffle axial float condition, aggravates the motor noise.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a rotor baffle fixed knot of motor constructs, includes pivot (1), is fixed in rotor (4) in the pivot outside, and rotor baffle (3) that the axial both ends of rotor set up, its characterized in that, rotor baffle (3) are discoid, and the central point is equipped with circular through-hole, a plurality of first fixed orificess (5) have been seted up around circular through-hole on the rotor baffle, a plurality of second fixed orificess (7) have been seted up on the both sides terminal surface of rotor respectively, rotor baffle (3) and rotor are to merging through running through first fixed orifices and stretch into fastener (2) interference fit connection to the second fixed orificess.

2. The rotor guard fixing structure of an electric machine according to claim 1, wherein the fastening member (2) is a pin or a rivet.

3. The rotor guard fixing structure of an electric machine according to claim 1, wherein a boss (21) for restricting the axial movement of the rotor guard (3) is formed at one end of the fastening member (2).

4. The rotor guard fixing structure of an electric machine according to claim 1, wherein the first fixing holes (5) are uniformly distributed on the same circumference.

5. The rotor baffle fixing structure of the motor as claimed in claim 1, wherein the rotor (4) is circumferentially provided with a V-shaped groove (6) which is axially penetrated and used for accommodating the magnetic steel, the vertex of the V-shaped groove faces the center of the circle, and the second fixing hole (7) is arranged corresponding to the radial inner side of the vertex.

6. The structure of claim 1, wherein the rotor guard is in interference fit with the shaft.