CN216414085U

CN216414085U - Three-bearing mechanism with two shafting matched and power system

Info

Publication number: CN216414085U
Application number: CN202122771177.XU
Authority: CN
Inventors: 李敏; 缪祺恺; 何礼华
Original assignee: Shanghai GKN Huayu Driveline Systems Co Ltd
Current assignee: Shanghai GKN Huayu Driveline Systems Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-04-29
Anticipated expiration: 2031-11-12

Abstract

The utility model relates to the technical field of power transmission, in particular to a three-bearing mechanism with two matched shafts and a power system comprising the three-bearing mechanism. Compared with the prior art, the utility model reduces the number of the bearings at one position, thereby reducing the arrangement space of the whole two-axis matching structure in the width direction of the whole vehicle by at least one bearing width space, and the part of space can be used for improving the torque power output capacity of the motor and improving the power performance of the whole vehicle.

Description

Three-bearing mechanism with two shafting matched and power system

Technical Field

The utility model relates to the technical field of power transmission, in particular to a three-bearing mechanism with two matched shafts and a power system comprising the three-bearing mechanism.

Background

The compactness, the high torque density, the high power density and the high speed are increasingly the development trend of a new energy automobile power system, in order to improve the power performance of the whole automobile, an increasingly high torque power motor is used on the new energy automobile, the width of the automobile frame cannot be continuously widened, and the arrangement space of other power system components is undoubtedly reduced. Therefore, the problem that how to reasonably compress the space of other parts and components to arrange a high-torque power motor in the whole vehicle is needed to be solved is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a three-bearing mechanism with two matched shaft systems, which can reduce the arrangement space of the whole two-shaft system matched structure in the width direction of the whole vehicle so as to overcome the defects in the prior art.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a three-bearing mechanism with two matched shaft systems, which comprises a speed reducer high-speed shaft, a motor rotor shaft, a first bearing, a second bearing and a third bearing, wherein the first bearing is assembled at the left end of the speed reducer high-speed shaft, the second bearing is assembled at the right end of the motor rotor shaft, the right end of the speed reducer high-speed shaft and the left end of the motor rotor shaft are fixedly assembled in an inserting mode, and the third bearing is assembled at the inserting assembling position of the speed reducer high-speed shaft and the motor rotor shaft.

Preferably, the third bearing is assembled on the right end of the high-speed shaft of the speed reducer, and the left end of the rotor shaft of the motor is inserted into the right end of the high-speed shaft of the speed reducer.

Preferably, the third bearing is assembled on the left end of the motor rotor shaft, and the right end of the speed reducer high-speed shaft is inserted inside the left end of the motor rotor shaft.

Preferably, the speed reducer with the speed reducer high speed shaft and the motor with the motor rotor shaft share the same housing.

The utility model also provides a power system which comprises the three-bearing mechanism matched with the two shaft systems.

Compared with the prior art, the utility model has the remarkable progress that:

the right end of the high-speed shaft of the speed reducer and the left end of the rotor shaft of the motor are fixedly assembled in an inserting mode, the right end of the high-speed shaft of the speed reducer and the left end of the rotor shaft of the motor can be simultaneously supported by only one third bearing, and compared with a scheme that two shafts of the prior art are matched, the speed reducer and the motor rotor shaft of the motor are provided with four bearings, the number of the bearings is reduced, so that the arrangement space of the whole two-shaft system matching structure in the width direction of the whole vehicle is reduced by at least one space of the width of the bearings, the space of the part can be used for improving the torque power output capacity of the motor, the motor is additionally provided with arrangement length and lamination sheets, the output power of the motor is increased, higher power output is achieved under the same arrangement envelope, and the power performance of the whole vehicle is improved.

Drawings

Fig. 1 is a schematic structural diagram of a two-axis system matched four-bearing scheme in the prior art.

Fig. 2 is a schematic structural diagram of a two-axis system-matched three-bearing mechanism according to an embodiment of the present invention.

Wherein the reference numerals are as follows:

01 speed reducer high-speed shaft

Left bearing of 011 speed reducer

012 reducer right bearing

02 electric motor rotor shaft

021 left bearing of motor

022 electric machine right bearing

1 speed reducer high-speed shaft

2 electric motor rotor shaft

3 first bearing

4 second bearing

5 third bearing

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the prior art, as shown in fig. 1, a reducer high-speed shaft 01 and a motor rotor shaft 02 in a power system are both high-speed rotating shafts, a four-bearing scheme is adopted for matching two shafts, generally, the reducer high-speed shaft 01 and the motor rotor shaft 02 are respectively matched with a pair of bearings, namely, a reducer left bearing 011, a reducer right bearing 012, a motor left bearing 021 and a motor right bearing 022, the reducer left bearing 011 and the reducer right bearing 012 jointly support the reducer high-speed shaft 01, the motor left bearing 021 and the motor right bearing 022 jointly support the motor rotor shaft 02, and the reducer high-speed shaft 01 and the motor rotor shaft 02 are connected through a spline so that the two shafts maintain the same rotating speed. This solution has the following drawbacks.

The assembly positioning tolerance of the left bearing 011 and the right bearing 012 of the speed reducer is processed and positioned according to the shell part of the speed reducer, the assembly positioning tolerance of the left bearing 021 and the right bearing 022 of the motor is processed and positioned according to the shell part of the motor, and finally, the spline is matched in place in an assembly mode through the positioning pin and the spigot, so that the spline can be partially over-positioned in the matching process, and the assembly method can easily cause the problem that the spline shaft is influenced by deflection to generate order noise based on a high-speed rotating shaft during the rotating work.

And b, the two high-speed rotating shafts are not very large in bearing, but in order to ensure the rigidity requirement of the respective high-speed rotating shaft systems in the design process, the four bearings are all selected from bearings with larger bearing, the damage rate is smaller than the bearing capacity of the bearings, and over-design in product design is caused.

And c, the running working temperature of the motor is far more severe than that of the reducer, so that the bearing precision and heat resistance requirements of the motor are far higher than those of the bearing of the reducer.

Therefore, the existing four-bearing scheme with two shafting matched has an optimized space.

In order to realize that the high-torque power motor can be arranged in the whole vehicle by reasonably compressing the space of other parts, the utility model provides a three-bearing mechanism matched with two shaft systems aiming at improving and optimizing the scheme of the existing four-bearing matched with two shaft systems so as to realize the reduction of the arrangement space of the whole structure matched with two shaft systems in the width direction of the whole vehicle, and the vacant space can be used for improving the torque power output capability of the motor, thereby realizing the improvement of the power performance of the whole vehicle.

As shown in fig. 2, one embodiment of a two-axis mating three-bearing mechanism of the present invention.

The two-axis system matched three-bearing mechanism of the embodiment comprises a speed reducer high-speed shaft 1, a motor rotor shaft 2, a first bearing 3, a second bearing 4 and a third bearing 5. Wherein the first bearing 3 is fitted on the left end of the reducer high-speed shaft 1, and the first bearing 3 serves as a reducer left bearing. The second bearing 4 is fitted on the right end of the motor rotor shaft 2, the second bearing 4 serving as a motor right bearing. The right end of the speed reducer high-speed shaft 1 is fixedly spliced with the left end of the motor rotor shaft 2, so that the speed reducer high-speed shaft 1 and the motor rotor shaft 2 keep the same rotating speed. And the third bearing 5 is assembled at the insertion assembly position of the speed reducer high-speed shaft 1 and the motor rotor shaft 2.

The two-shaft system matched three-bearing mechanism of the embodiment is characterized in that the right end of the high-speed shaft 1 of the speed reducer and the left end of the motor rotor shaft 2 are fixedly inserted and assembled, the right end of the high-speed shaft 1 of the speed reducer and the left end of the motor rotor shaft 2 can be simultaneously supported by only one third bearing 5, compared with a two-shaft system matched four-bearing scheme in the prior art, the two-shaft system matched three-bearing mechanism of the embodiment reduces the number of one bearing, therefore, the whole arrangement space of the two-shaft system matched structure in the width direction of the whole vehicle is reduced by the space of at least one bearing width, the partial space can be used for improving the torque power output capacity of the motor, the motor is enabled to obtain extra arrangement length increasing laminations, the output power of the motor is increased, higher power output is realized under the same arrangement envelope, and the power performance of the whole vehicle is improved.

In a first embodiment, referring to fig. 1, the third bearing 5 may be assembled on the right end of the reducer high-speed shaft 1, and the left end of the motor rotor shaft 2 is inserted inside the right end of the reducer high-speed shaft 1, so that the third bearing 5 serves as a reducer right bearing, and compared with the prior art two-shaft system matched four-bearing scheme, the motor left bearing is removed. This first embodiment is preferably used in practical applications in consideration of the use conditions of the motor and the speed reducer.

In the first embodiment, it is preferable that the reducer having the reducer high-speed shaft 1 and the motor having the motor rotor shaft 2 share the same housing. During assembly, the speed reducer high-speed shaft 1 can be assembled in place, then the left end of the motor rotor shaft 2 and the matched spigot on the shaft are inserted into the right end of the speed reducer high-speed shaft 1, the right end of the speed reducer high-speed shaft 1 and the left end of the motor rotor shaft 2 are fixedly assembled in a plugging mode, and then the bearing is pressed into the speed reducer high-speed shaft 1 and the motor rotor shaft 2, so that the speed reducer high-speed shaft 1 and the motor rotor shaft 2 are coaxial. Further, for reducing the runout of the motor rotor shaft 2, the runout level of the motor rotor shaft of the two-shafting matched four-bearing scheme in the prior art is achieved, the matching tolerance of a compression part can be compressed on local design so as to meet the design requirement of a product, and more excellent vibration noise level control is realized.

In the second embodiment, the third bearing 5 can also be assembled on the left end of the motor rotor shaft 2, and the right end of the reducer high-speed shaft 1 is inserted inside the left end of the motor rotor shaft 2, so that the third bearing 5 serves as a motor left bearing, and compared with the prior art two-shaft system matched four-bearing scheme, the reducer right bearing is removed. This second embodiment may also be used in some applications.

In the second embodiment, it is preferable that the reducer having the reducer high-speed shaft 1 and the motor having the motor rotor shaft 2 share the same housing. During assembly, the motor rotor shaft 2 can be assembled in place firstly, then the right end of the speed reducer high-speed shaft 1 and the matched spigot on the shaft are inserted into the left end of the motor rotor shaft 2, the right end of the speed reducer high-speed shaft 1 and the left end of the motor rotor shaft 2 are fixedly assembled in a plugging mode, and then the bearing is pressed into the bearing, so that the coaxiality of the speed reducer high-speed shaft 1 and the motor rotor shaft 2 is achieved. Further, for reducing the runout of the motor rotor shaft 2, the runout level of the motor rotor shaft of the two-shafting matched four-bearing scheme in the prior art is achieved, the matching tolerance of a compression part can be compressed on local design so as to meet the design requirement of a product, and more excellent vibration noise level control is realized.

Based on the above two shafting matched three bearing mechanisms of this embodiment, this embodiment further provides a power system, and the power system of this embodiment includes the above two shafting matched three bearing mechanisms of this embodiment.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a diaxon is complex triaxial bearing mechanism, its characterized in that, includes reduction gear high-speed shaft (1), electric motor rotor axle (2), first bearing (3), second bearing (4) and third bearing (5), first bearing (3) assembly is in on the left end of reduction gear high-speed shaft (1), second bearing (4) assembly is in on the right-hand member of electric motor rotor axle (2), the right-hand member of reduction gear high-speed shaft (1) with the left end grafting assembly of electric motor rotor axle (2) is fixed, third bearing (5) assembly is in reduction gear high-speed shaft (1) with the grafting assembly department of electric motor rotor axle (2).

2. Two-axis matched three-bearing mechanism according to claim 1, characterized in that the third bearing (5) is fitted on the right end of the reducer high-speed shaft (1), and the left end of the motor rotor shaft (2) is inserted inside the right end of the reducer high-speed shaft (1).

3. Two-axis matched three-bearing mechanism according to claim 1, characterized in that the third bearing (5) is fitted on the left end of the motor rotor shaft (2) and the right end of the reducer high-speed shaft (1) is inserted inside the left end of the motor rotor shaft (2).

4. Two-axis matched three-bearing mechanism according to claim 1, characterized in that the reducer with the reducer high-speed shaft (1) and the motor with the motor rotor shaft (2) share the same housing.

5. A power system comprising a two-axis mating three-bearing mechanism according to any one of claims 1 to 4.