CN215172084U

CN215172084U - Integrated reduction gear input shaft integrated with motor shaft

Info

Publication number: CN215172084U
Application number: CN202120874719.3U
Authority: CN
Inventors: 赵成福; 刘君祺; 高一; 刘欢
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-12-14
Anticipated expiration: 2031-04-26

Abstract

The utility model relates to an integrated reduction gear input shaft with motor shaft integration, include the input shaft with motor shaft and reduction gear input shaft integration together, the intermediate position of input shaft is equipped with the bearing and keeps off the shoulder, and intermediate bearing, spacing bush, rotor silicon steel sheet, a pair of dynamic balance board, locking clamp plate and fore bearing are equipped with in its left side, and the right side is equipped with one-level driving gear and rear bearing, and the intermediate bearing is installed in the front on the shell, and the rear bearing is installed on the shell, and the shell is fixed around. The utility model discloses the integrated reduction gear input shaft integrated with motor shaft, simple structure, spare part are few, and the integrated level is high; the integrated shaft of the utility model can reduce one bearing, and the weight and the cost of the assembly are reduced by adopting a three-bearing supporting mode; in addition, the integrated shaft cancels a connecting structure of two split shafts, has simple structure and reduces the number of parts; meanwhile, the centering performance is better, and the problems of NVH, reliability and the like caused by the centering performance are reduced.

Description

Integrated reduction gear input shaft integrated with motor shaft

Technical Field

The utility model belongs to the technical field of the new energy automobile, in particular to integrated reduction gear input shaft with motor shaft is integrated.

Background

With the continuous development of new energy automobiles, electric drive systems are continuously updated and replaced, and the integration degree is higher and higher. At present, in most of electric drive products, a motor shaft and an input shaft of a speed reducer are in a disconnected structure and are connected by means of splines or special couplers and the like. The parts quantity is more, and because the centering nature of diaxon is not good, often has NVH, sealed and reliability scheduling problem.

And a motor shaft and a speed reducer input shaft are in an integrated structure, so that the integration level is high. The prior art discloses an arrangement structure of motor and reduction gear, including motor and reduction gear, the motor includes stator, rotor shaft, front end housing and rear end cap, the reduction gear includes reduction gears and reduction gear box, the reduction gear box is connected and communicates with the front end housing, the rotor shaft stretches into in the reduction gear box, as motor output shaft and reduction gear input shaft simultaneously, this rotor shaft both ends support respectively on rear end housing and reduction gear box, install reduction gear power input gear on the rotor shaft, this reduction gear power input gear is located the reduction gear box. However, the device adopts a two-bearing supporting mode, the stress of the gear at the end of the speed reducer can cause the deformation of the integral shaft, and the deformation can influence the running precision of the motor rotor and further influence the performance of the motor.

Disclosure of Invention

An object of the utility model is to provide an integrated reduction gear input shaft with motor shaft integration to solve current motor shaft and reduction gear input shaft and adopt disconnected formula structure, have NVH, sealed and reliability problem, adopt the integral structure, two bearing support, reduction gear end gear atress can lead to a body axle to take place to warp, influences the problem of motor performance.

The utility model aims at realizing through the following technical scheme:

an integrated reducer input shaft integrated with a motor shaft comprises an input shaft 1 integrating the motor shaft and the reducer input shaft together;

a bearing retaining shoulder 101 is arranged in the middle of the input shaft 1, a middle bearing 7, a limiting bush 6, a rotor silicon steel sheet 5, a pair of dynamic balance plates 4, a locking pressing plate 3 and a front bearing 2 are arranged on the left side of the bearing retaining shoulder 101, and a primary driving gear 102 and a rear bearing 8 are arranged on the right side of the bearing retaining shoulder 101;

the middle bearing 7 is mounted on the front shell 9, the rear bearing 8 is mounted on the rear shell 10, and the front shell 9 and the rear shell 10 are fixed.

Furthermore, the left side of the bearing shoulder 101 is sequentially provided with a middle bearing 7, a limiting bush 6, a dynamic balance plate 4, a rotor silicon steel sheet 5, another dynamic balance plate 4, a locking pressing plate 3 and a front bearing 2 from right to left; the middle bearing 7, the two dynamic balance plates 4 and the front bearing 2 are in interference fit with the input shaft 1 respectively, the limiting bushing 6 is in clearance fit with the input shaft 1, the rotor silicon steel sheet 5 is installed on the input shaft 1 through the flat key 11, and the locking pressing plate 3 is tightly connected with the input shaft 1.

Further, the intermediate bearing 7 is directly mounted to the input shaft 1 from the motor rotor side, and is interference-fitted to the input shaft 1.

Further, the bearing seat of the intermediate bearing 7 is integrally formed with the primary driving gear 102 and the input shaft 1.

Further, the rear bearing 8 is located on the right side of the first-stage driving gear 102, and an inner ring of the rear bearing 8 is in interference fit with the input shaft 1.

Furthermore, the input shaft 1 is further provided with a front bearing seat 103, a middle bearing seat 104 and a rear bearing seat 105 which are integrally formed with the input shaft 1, and a flat key groove 106 is formed between the two dynamic balance plates 4 on the input shaft 1.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses the integrated reduction gear input shaft integrated with motor shaft, simple structure, spare part are few, and the integrated level is high; the integrated shaft of the utility model can reduce one bearing, and the weight and the cost of the assembly are reduced by adopting a three-bearing supporting mode; in addition, the integrated shaft cancels a connecting structure of two split shafts, has simple structure and reduces the number of parts; meanwhile, the centering performance is better, and the problems of NVH, reliability and the like caused by the centering performance are reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of an input shaft of an integrated speed reducer integrated with a motor shaft of the present invention;

fig. 2 is a schematic view of the input shaft structure.

In the figure, 1, an input shaft 2, a front bearing 3, a locking pressure plate 4, a dynamic balance plate 5, a rotor silicon steel sheet 6, a limiting bush 7, a middle bearing 8, a rear bearing 9 and a front shell 11 are arranged. The bearing comprises a flat key 101, a bearing retaining shoulder 102, a primary driving gear 103, a front bearing seat 104, a middle bearing seat 105, a rear bearing seat 106 and a flat key groove.

Detailed Description

The invention will be further described with reference to the following examples:

the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-2, the utility model discloses with integrated reduction gear input shaft of motor shaft, including input shaft 1, front bearing 2, locking clamp plate 3, a pair of dynamic balance board 4, rotor silicon steel sheet 5, stop bush 6, intermediate bearing 7 and rear bearing 8.

The input shaft 1 integrates a motor shaft and a reducer input shaft together and is integrally formed. The middle position of the input shaft 1 is provided with a bearing blocking shoulder 101, and the left side of the bearing blocking shoulder 101 is sequentially provided with a middle bearing 7, a limiting bush 6, a dynamic balance plate 4, a rotor silicon steel sheet 5, the dynamic balance plate 4, a locking pressure plate 3 (or a locking nut) and a front bearing 2 from right to left. The middle bearing 7, the two dynamic balance plates 4 and the front bearing 2 are in interference fit with the input shaft 1 respectively, the limiting bushing 6 is in clearance fit with the input shaft 1, the rotor silicon steel sheet 5 is installed on the input shaft 1 through the flat key 11, and the locking pressing plate 3 is tightly connected with the input shaft 1. The distal end of the right side of the bearing retaining shoulder 101 is integrally provided with a primary driving gear 102 on the input shaft 1. And a rear bearing 8 in interference fit with the input shaft 1 is arranged on the right side of the primary driving gear 102.

The input shaft 1 is further provided with a front bearing seat 103, a middle bearing seat 104 and a rear bearing seat 105 which are integrally formed with the input shaft 1, and a flat key groove 106 is formed between the two dynamic balance plates 4 on the input shaft 1.

The input shaft 1 is supported by three bearings, a front bearing 2, a middle bearing 7 and a rear bearing 8. The intermediate bearing 7 is directly arranged on the input shaft 1 from the side of the motor rotor and is in interference fit with the input shaft 1, and a bearing mounting block is not needed. The bearing seat of the intermediate bearing 7, the first-stage driving gear 102 and the input shaft 1 are integrally formed, and no additional bearing mounting block or first-stage driving gear is required to be mounted on the input shaft 1. The primary drive gear 102 passes through a bearing seat on the reducer front shell 9 until the intermediate bearing 7 is assembled with the bearing seat in place. The rear bearing 8 is fitted to the rear housing 10, and then the housing 10 is fitted together to the front housing 9 while the input shaft 1 is fitted with the inner race of the rear bearing 8. The over-positioning problem of the three-bearing support is solved by adjusting the matching relation between the shaft and the bearing inner ring or between the shell and the bearing outer ring.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides an integrated reduction gear input shaft with motor shaft integrated which characterized in that: comprises an input shaft (1) integrating a motor shaft and a reducer input shaft together;

a bearing blocking shoulder (101) is arranged in the middle of the input shaft (1), a middle bearing (7), a limiting bush (6), a rotor silicon steel sheet (5), a pair of dynamic balance plates (4), a locking pressing plate (3) and a front bearing (2) are arranged on the left side of the bearing blocking shoulder (101), and a primary driving gear (102) and a rear bearing (8) are arranged on the right side of the bearing blocking shoulder (101);

the middle bearing (7) is arranged on the front shell (9), the rear bearing (8) is arranged on the rear shell (10), and the front shell (9) and the rear shell (10) are fixed.

2. An integrated reducer input shaft integrated with a motor shaft according to claim 1, characterized in that: the left side of the bearing retaining shoulder (101) is sequentially provided with a middle bearing (7), a limiting bush (6), a dynamic balance plate (4), a rotor silicon steel sheet (5), another dynamic balance plate (4), a locking pressing plate (3) and a front bearing (2) from right to left; the middle bearing (7), the two dynamic balance plates (4) and the front bearing (2) are in interference fit with the input shaft (1) respectively, the limiting bushing (6) is in clearance fit with the input shaft (1), the rotor silicon steel sheet (5) is installed on the input shaft (1) through a flat key (11), and the locking pressing plate (3) is fixedly connected with the input shaft (1).

3. An integrated reducer input shaft integrated with a motor shaft according to claim 1, characterized in that: the intermediate bearing (7) is directly arranged on the input shaft (1) from the rotor side of the motor and is in interference fit with the input shaft (1).

4. An integrated reducer input shaft integrated with a motor shaft according to claim 1, characterized in that: and a bearing seat of the intermediate bearing (7) is integrally formed with the primary driving gear (102) and the input shaft (1).

5. An integrated reducer input shaft integrated with a motor shaft according to claim 1, characterized in that: the rear bearing (8) is positioned on the right side of the first-stage driving gear (102), and the inner ring of the rear bearing (8) is in interference fit with the input shaft (1).

6. An integrated reducer input shaft integrated with a motor shaft according to claim 1, characterized in that: the input shaft (1) is further provided with a front bearing seat (103), a middle bearing seat (104) and a rear bearing seat (105) which are integrally formed with the input shaft (1), and a flat key groove (106) is formed between the two dynamic balance plates (4) on the input shaft (1).