CN221323089U - Connection protection device of high-speed generator shaft, high-speed generator and electric automobile - Google Patents

Abstract

The utility model provides a connection protection device of a high-speed generator shaft, a high-speed generator and an electric automobile, wherein the connection protection device comprises: the limiting component is connected with the generator shaft and is arranged outside a connecting component connected with the generator shaft; a protection member including a protection portion and a connection portion; the protection part is in a ring shape and is sleeved outside the limiting part; the connecting part is connected with the generator shaft, so that the limiting part can be effectively prevented from loosening and flying out when the generator shaft runs at a high speed, and the connecting part is ensured to be firmly connected.

Description

Connection protection device of high-speed generator shaft, high-speed generator and electric automobile

Technical Field

The utility model relates to the technical field of electric automobile generators, in particular to a connection protection device of a high-speed generator shaft.

Background

In order to increase the cruising performance of an electric vehicle, it is generally required to transfer kinetic energy of an engine to a generator through a transmission, so that the generator converts the kinetic energy into electric energy for storage or utilization. Therefore, the generator shaft needs to be connected to an external transmission.

In practice, the drive shaft of the generator may reach rotational speeds even exceeding 20000 revolutions, which makes it necessary for the components connected to the external drive shaft to be subjected to considerable centrifugal forces. Such high-speed rotation easily causes the connection member to be loosened or damaged, thereby affecting the normal operation of the electric vehicle.

In order to overcome this technical problem, one solution is to use a limiting element to limit the movement of the connecting member in the axial direction. Therefore, the limiting part can effectively keep the stability of connection. However, it should be noted that the limiting element itself is also subjected to considerable centrifugal forces, which tend to come loose and even fly out in the case of high-speed operation, thus failing and presenting a high risk.

Disclosure of utility model

In order to overcome the above technical drawbacks, an object of the present utility model is to provide a connection protection device for a generator shaft, which aims to solve the drawbacks of the prior art.

A first aspect of the present utility model provides a connection protection device for a high-speed generator shaft, comprising: the limiting component is connected with the generator shaft and is arranged outside a connecting component connected with the generator shaft; a protection member including a protection portion and a connection portion; the protection part is in a ring shape and is sleeved outside the limiting part; the connecting part is connected with the generator shaft.

Preferably, the protection portion includes an accommodation groove for accommodating the limiting member.

Preferably, the limiting component is two limiting semi-rings.

Preferably, the connecting part comprises a first ring and a second ring, the second ring extends out of the middle of the inner side of the first ring, the diameter of the first ring is larger than that of the second ring, the first ring and the protecting part are integrally formed, and the second ring is inserted into the axial inner hole of the generator shaft.

Preferably, the second ring is an interference fit with the axial bore.

Preferably, the second annular outer side comprises a thread, which is screwed with the inner surface of the generator shaft.

Preferably, the connecting part further comprises a first connecting snap ring, the second annular outer side surface comprises a first connecting groove, and the first connecting groove is connected with the inner surface of the generator shaft through the first connecting snap ring.

Preferably, the connecting part is a second connecting snap ring, the protecting part comprises a second connecting groove, and the second connecting groove is connected with the outer surface of the motor shaft through the second connecting snap ring.

A second aspect of the utility model provides a high-speed generator comprising the connection protection device of the first aspect.

A third aspect of the present utility model provides an electric vehicle, including the connection protection device of the first aspect.

After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:

1. The connecting protection device comprises a limiting part and a protection part, wherein the protection part is sleeved outside the limiting part, and can effectively prevent the limiting part from loosening and flying out when a generator shaft runs at a high speed, so that the connecting part is ensured to be firmly connected.

2. The protection part comprises a protection part and a connecting part, the protection part is in ring-shaped sleeved outside the limiting part, the connecting part is connected with the generator shaft, the protection part is less in axial force of the generator shaft, and is fixed through the stress of the connecting part, so that the safety risk of the protection part is reduced while the limiting device is effectively protected.

3. The connecting protection device is simple in structure, low in cost and convenient to install, but effectively prevents the connecting part from moving in the axial direction, and risks are reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of a connection protection device, a generator shaft and a connection component assembly structure according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the assembly structure of a connection protection device, a generator shaft and a connection part according to a preferred embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 1 provided by the present utility model;

FIG. 4 is a spacing component of a preferred embodiment provided by the present utility model;

fig. 5 shows a protection component according to a preferred embodiment of the present utility model.

Detailed Description

Advantages of the utility model are further illustrated in the following description, taken in conjunction with the accompanying drawings and detailed description.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various elements, these information should not be limited to these terms. These terms are only used to distinguish one element of the same type from another.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.

In the following description, suffixes such as "component," "part," or "unit" used to represent elements are used only for facilitating the description of the present utility model, and are not of specific significance per se. Thus, the "component" and "part" may be used in combination, either as a single part or as multiple parts.

Fig. 1 is a schematic cross-sectional view showing an assembly structure of a connection protection device, a generator shaft and a connection part according to a preferred embodiment of the present utility model. Fig. 2 is a schematic view of an assembly structure of a connection protection device, a generator shaft and a connection part according to a preferred embodiment of the present utility model. Referring to fig. 1-2, a generator shaft 3 is connected at one end to the generator rotor and at the other end is engaged by a coupling member gear 4 with a transmission member (e.g., spline, not shown) on the engine shaft. The generator shaft 3 is also fitted with a first bearing 5 and a second bearing 6. In operation, the motor shaft drives the gear 4 to rotate through the transmission part, the gear 4 transmits power to the generator shaft 3, and the generator shaft 3 rotates at a high speed to drive the rotor to move so as to generate electric energy.

In this process, the connecting part gear 4 is easily released from the generator shaft 3 due to the high-speed rotation, so the embodiment further comprises a connection protection device of the high-speed generator shaft, and the connection protection device comprises a limiting part 1 and a protection part 2.

The stopper member 1 is connected to the generator shaft 3 and is provided outside the connecting member gear 4 connected to the generator shaft 3, thereby restricting the gear 4 from being released by an axial force.

Fig. 3 is an enlarged view of a portion of fig. 1 provided by the present utility model, and fig. 5 is a protective member according to a preferred embodiment provided by the present utility model. As shown in fig. 3 and 5, the protection member 2 includes a protection portion and a connection portion 202. The protection part 201 is ring-shaped and is sleeved outside the limiting component 1. The connection portion 202 is connected to the generator shaft 3.

Fig. 4 is a schematic diagram of a limiting component according to a preferred embodiment of the present utility model, as shown in fig. 4, the limiting component 1 may be an annular clamping spring, and a clamping groove is formed on an outer surface of the generator shaft 3, and the clamping spring is clamped into the clamping groove to achieve connection.

In another preferred embodiment, the protection portion 201 includes a receiving groove for receiving the limiting member 1. In this case, the limiting member 1 may preferably be two limiting half rings, which are easier to assemble than one annular snap spring.

As shown in fig. 3 and 5, in the present embodiment, the connection portion 202 includes a first ring 2021 and a second ring 2022. The second ring 2022 extends from the middle of the inner side of the first ring 2021, so that the first ring 2021 and the second ring 2022 are integrally formed. The first annular ring 2021 is larger in diameter than the second annular ring 2022. The first annular ring 2021 is integrally formed with the protecting portion 201, and the second annular ring 2022 is inserted into the axial inner bore 301 of the generator shaft 3.

Preferably, the second ring 2022 is an interference fit with the axial bore 301 in this embodiment, thereby securing the protection component 2 to the generator shaft 3.

In another preferred embodiment, the outer side of the second ring 2022 comprises threads and the inner surface of the generator shaft 3 comprises mating threads, which are threadably connected.

In another preferred embodiment, the connection 202 further comprises a first connection collar, the outer side of the second ring 2022 comprises a first connection groove, the inner surface of the generator shaft 3 likewise comprises a connection groove, and the first connection groove is connected to the inner surface connection groove of the generator shaft 3 by the first connection collar.

In another preferred embodiment, the connection 202 itself is a second connection snap ring, the protection 201 comprising a second connection groove, the outer surface of the generator shaft 3 also comprising a connection groove. The second connecting groove is connected with the outer surface connecting groove of the generator shaft 3 through a second connecting snap ring, so that the protection part 2 is fixedly connected with the outer surface of the generator shaft.

As can be seen from the description of the above embodiments, although the connecting portion 202 has various structures, since the protecting portion 201 is sleeved outside the limiting member 1 in a ring shape, the connecting portion 202 is connected with the generator shaft 3, the protecting portion 201 itself is less subject to the axial force of the generator shaft 3, and is fixed by the connecting portion 202, so that the limiting device 1 can be effectively protected while the safety risk of itself is reduced.

The utility model also provides a high-speed generator comprising the connection protection device described in any of the embodiments above.

The utility model also provides an electric automobile, which comprises the connection protection device described in any embodiment.

It should be noted that the embodiments of the present utility model are preferred and not limited in any way, and any person skilled in the art may make use of the above-disclosed technical content to change or modify the same into equivalent effective embodiments without departing from the technical scope of the present utility model, and any modification or equivalent change and modification of the above-described embodiments according to the technical substance of the present utility model still falls within the scope of the technical scope of the present utility model.

Claims (10)

1. A connection protection device for a high speed generator shaft, the connection protection device comprising:

The limiting component is connected with the generator shaft and is arranged outside a connecting component connected with the generator shaft;

A protection member including a protection portion and a connection portion; the protection part is in a ring shape and is sleeved outside the limiting part; the connecting portion is connected with the generator shaft.

2. The connection protection device of claim 1, wherein the protection portion includes a receiving slot for receiving the limiting member.

3. The connection protection device of claim 2, wherein the limiting member is two limiting half rings.

4. The connection protection device of claim 1, wherein the connection portion comprises a first ring shape and a second ring shape, the second ring shape extends from the middle of the inner side of the first ring shape, the first ring shape is larger than the second ring shape in diameter, the first ring shape and the protection portion are integrally formed, and the second ring shape is inserted into an axial inner hole of a generator shaft.

5. The connection protection device of claim 4, wherein the second ring is an interference fit with the axial bore.

6. The connection protection device of claim 4, wherein the second annular outer side includes threads that threadably engage an inner surface of the generator shaft.

7. The connection protection device of claim 4, wherein the connection portion further comprises a first connection collar, and the second annular outer side comprises a first connection groove, the first connection groove being connected to an inner surface of the generator shaft by the first connection collar.

8. The connection protection device of claim 1, wherein the connection portion is a second connection snap ring, and the protection portion includes a second connection groove, the second connection groove being connected to an outer surface of the motor shaft through the second connection snap ring.

9. A high-speed generator comprising a connection protection device according to any one of claims 1 to 8.

10. An electric vehicle characterized by comprising the connection protection device according to any one of claims 1 to 8.