Improved electric drive axle transmission structure

Abstract

The utility model discloses an improved electric drive axle transmission structure which comprises an input shaft, a first-stage driven gear, a second-gear driving gear, an intermediate shaft, an output shaft, a second-gear driven gear, an output shaft gear, a driving reduction gear and a half shaft. The input shaft is connected with the motor, and a gear is arranged on the input shaft; a first-stage driven gear and a second-stage driving gear are sequentially arranged on the intermediate shaft; a second-gear driven gear and an output shaft gear are sequentially arranged on the output shaft; a driving reduction gear is arranged on the half shaft; a gear on the input shaft is meshed with the first-stage driven gear so as to transmit torque to the middle shaft, a second-gear driving gear on the middle shaft is meshed with the second-gear driven gear so as to transmit torque to the output shaft, and an output shaft gear on the output shaft is meshed with the driving reduction gear so as to transmit torque to the half shaft. According to the utility model, the intermediate shaft and the input shaft are shortened, the overall length of the motor is shortened, the weight is reduced, the matching capability with two air bag suspension schemes of an air suspension is improved, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric drive axle transmission technical field relates to an improved electric drive axle transmission structure. BACKGROUND

[0002] The market share of the electric drive axle of the commercial vehicle is continuously increasing, compared with the traditional fuel drive axle, the electric drive axle has obvious advantages in power output, energy conversion efficiency, noise control and the like, and can meet the requirements of the commercial vehicle on efficient and reliable transportation.

[0003] The space of different vehicle chassis is quite different, when arranging the electric drive axle, it is necessary to consider whether it can be reasonably installed, to avoid interference with other components, or insufficient gap and the like, especially when the electric drive axle is matched with the air suspension, there is a problem of insufficient installation space, the electric drive axle and the air suspension both need to be arranged in the limited space of the chassis, the electric drive axle has its own size and shape, the air suspension system includes air bags, shock absorbers, pipelines and the like, if the two are arranged improperly, interference is easy to occur, and even the air suspension is damaged. CONTENT OF THE UTILITY MODEL

[0004] In view of the problems in the prior art, the utility model aims at providing an improved electric drive axle transmission structure to solve the problem of insufficient installation space when the electric drive axle is matched with the air suspension.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme to realize it:

[0006] An improved electric drive axle transmission structure, comprising an input shaft, a primary driven gear, a second gear driving gear, an intermediate shaft, an output shaft, a second gear driven gear, an output shaft gear, a driving reduction gear and a half shaft.

[0007] The input shaft is connected with the motor, and a gear is arranged on the input shaft.

[0008] The intermediate shaft is sequentially provided with the primary driven gear and the second gear driving gear.

[0009] The output shaft is sequentially provided with the second gear driven gear and the output shaft gear.

[0010] The half shaft is provided with the driving reduction gear.

[0011] The gear on the input shaft is engaged with the primary driven gear to transmit torque to the intermediate shaft, the second gear driving gear on the intermediate shaft is engaged with the second gear driven gear to transmit torque to the output shaft, and the output shaft gear on the output shaft is engaged with the driving reduction gear to transmit torque to the half shaft.

[0012] The utility model also includes the following technical features:

[0013] Specifically, the length of the intermediate shaft is shortened by 55mm, being 251.3mm.

[0014] Specifically, the length of the input shaft is shortened by 55mm, being 146.5mm.

[0015] Specifically, the weight of the intermediate shaft is reduced by 1.5kg, being 2.5kg; the weight of the removed first gear passive gear is 6kg; the weight of the shaft and gear on both sides of the half shaft is reduced by 7.5kg respectively, being 15kg in total.

[0016] Specifically, the electric drive axle transmission is changed into single gear, the speed ratio being 30.

[0017] Specifically, two groups of motors, input shafts, first gear passive gears, second gear driving gears, intermediate shafts, output shafts, second gear passive gears and output shaft gears are symmetrically arranged on both sides of the half shaft.

[0018] Specifically, from the half shaft to the left side and from the half shaft to the right side, the output shaft, the intermediate shaft and the input shaft are sequentially arranged and parallel to each other.

[0019] Specifically, the arrangement direction of the first gear passive gear to the second gear driving gear is opposite to the arrangement direction of the second gear passive gear to the output shaft gear.

[0020] Compared with the prior art, the utility model has the following technical effects:

[0021] The utility model discloses the optimization electric drive axle arrangement and air suspension matching, combines the experience of whole car arrangement, on the basis of single axle double motor, reference original arrangement experience, shorten 55mm of intermediate shaft and input shaft, the overall length of motor is shortened about 50mm, reduce 15kg, reduce cost;The matching ability with the two air bag suspension scheme of air suspension is improved, can match all leaf spring suspension vehicle types and air bag center distance (width) not less than 800mm vehicle type;And because remove a gear meshing gear, the speed ratio of front transmission changes from 50.4 / 16.6 to 30, and the motor efficient area is wider (can cover 25-105km / h). DRAWINGS

[0022] Figure 1 It is the structure schematic diagram of the utility model.

[0023] The meaning of each reference numeral in the drawing is as follows:

[0024] 1. input shaft, 2. first gear passive gear, 3. second gear driving gear, 4. intermediate shaft, 5. output shaft, 6. second gear passive gear, 7. output shaft gear, 8. driving reduction gear, 9. half shaft. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0026] Example 1:

[0027] like Figure 1 As shown, this embodiment provides an improved electric drive axle transmission structure, including an input shaft 1, a first-stage driven gear 2, a second-stage driving gear 3, an intermediate shaft 4, an output shaft 5, a second-stage driven gear 6, an output shaft gear 7, a driving reduction gear 8, and a half-shaft 9. The input shaft 1 is connected to a motor and is equipped with gears. The intermediate shaft 4 is sequentially equipped with the first-stage driven gear 2 and the second-stage driving gear 3. The output shaft 5 is sequentially equipped with the second-stage driven gear 6 and the output shaft gear 7. The half-shaft 9 is equipped with the driving reduction gear 8. The gears on the input shaft 1 mesh with the first-stage driven gear 2 to transmit torque to the intermediate shaft 4. The second-stage driving gear 3 on the intermediate shaft 4 meshes with the second-stage driven gear 6 to transmit torque to the output shaft 5. The output shaft gear 7 on the output shaft 5 meshes with the driving reduction gear 8 to transmit torque to the half-shaft 9.

[0028] The length of intermediate shaft 4 is shortened by 55mm to 251.3mm. The length of input shaft 1 is shortened by 55mm to 146.5mm.

[0029] After the intermediate shaft 4 is reduced by 1.5kg, its weight is 2.5kg; the removed first-gear driven gear weighs 6kg; the shafts and gears on both sides of the half shaft 9 are reduced by 7.5kg each, for a total weight reduction of 15kg.

[0030] The electric drive axle transmission was changed to single gear, and the speed ratio was changed from 50.4 / 16.6 to 30.

[0031] Two sets of motors, input shaft 1, first-stage driven gear 2, second-stage driving gear 3, intermediate shaft 4, output shaft 5, second-stage driven gear 6, and output shaft gear 7 are symmetrically arranged on both sides of half shaft 9.

[0032] The output shaft 5, intermediate shaft 4, and input shaft 1 are arranged sequentially from half-shaft 9 to its left and from half-shaft 9 to its right, and they are parallel to each other.

[0033] The arrangement direction of the first-stage driven gear 2 to the second-stage driving gear 3 is opposite to the arrangement direction of the second-stage driven gear 6 to the output shaft gear 7.

[0034] The utility model discloses on the basis of single bridge double motor, reference original arrangement experience, shorten 55mm to 251.3mm and 146.5mm respectively by 306.3mm and 201.5mm with intermediate shaft and input shaft;Motor overall length shortens about 50mm, and reduces 15kg, specifically, shortening position is the intermediate shaft gear and a passive gear in the existing structure, and the intermediate shaft mass changes from 4kg to 2.5kg, and a passive gear 6kg, and single side reduces 7.5kg, and reduces cost;The matching ability with air suspension two airbag suspension scheme is improved, can match all leaf spring suspension vehicle type and airbag center distance (width) not less than 800mm vehicle type;And because the intermediate shaft gear and a passive gear are removed, the speed ratio changes from 50.4 / 16.6 to 30, and the motor high efficiency area coverage is wider, and can cover 25-105km / h.

[0035] Double motor power transmission diagram is symmetrical, and after passive gear is removed, electric drive axle transmission becomes single gear, and the speed ratio changes from 50.4 / 16.6 to 30, and power transmission is transmitted to intermediate shaft from input shaft, then is transmitted to two passive gears through two active gears on intermediate shaft, is transmitted to output shaft through two passive gears, and then is transmitted to half shaft through the meshing of output shaft gear and active reduction gear, and power transmission is completed. Among them, power transmission is not gear shifting, and after front transmission is single gear, input shaft and intermediate shaft are shortened, and reduce 15kg, and improve the matching ability of different chassis.

[0036] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the specific details in the above-mentioned embodiments, and various simple modifications can be made to the technical scheme of the utility model within the technical concept of the utility model, and these simple modifications all belong to the protection scope of the utility model.

[0037] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the utility model will not further describe various possible combination manners.

[0038] In addition, various different embodiments of the utility model can also be combined arbitrarily, as long as it does not deviate from the technical concept of the utility model, and it should be regarded as the disclosed content of the utility model.

Claims

1. An improved electric drive axle transmission structure, characterized by, The transmission comprises an input shaft (1), a first gear (2), a second driving gear (3), an intermediate shaft (4), an output shaft (5), a second driven gear (6), an output shaft gear (7), a driving reduction gear (8), and a half shaft (9). The input shaft (1) is connected with a motor, and a gear is arranged on the input shaft (1). The intermediate shaft (4) is sequentially provided with the first gear (2) and the second driving gear (3). The output shaft (5) is sequentially provided with the second driven gear (6) and the output shaft gear (7). The half shaft (9) is provided with the driving reduction gear (8). The gear on the input shaft (1) is engaged with the first gear (2) to transmit torque to the intermediate shaft (4), the second driving gear (3) on the intermediate shaft (4) is engaged with the second driven gear (6) to transmit torque to the output shaft (5), and the output shaft gear (7) on the output shaft (5) is engaged with the driving reduction gear (8) to transmit torque to the half shaft (9).

2. The improved electrically driven axle transmission structure according to claim 1, wherein, The length of the intermediate shaft (4) is shortened by 55 mm, and is 251.3 mm.

3. The improved electrically driven axle transmission structure according to claim 1, wherein The length of the input shaft (1) is shortened by 55 mm, and is 146.5 mm.

4. The improved electrically driven axle transmission structure according to claim 1, wherein After the intermediate shaft (4) is reduced in weight by 1.5 kg, the weight is 2.5 kg, and the first driven gear is removed, which weighs 6 kg, so that the shafts and gears on both sides of the half shaft (9) are reduced in weight by 7.5 kg, and the total weight is reduced by 15 kg.

5. The improved electrically driven axle transmission structure according to claim 1, wherein The electric drive axle transmission is changed to single gear, and the speed ratio is 30.

6. The improved electrically driven axle transmission structure according to claim 1, wherein Two groups of motors, input shafts (1), first gears (2), second driving gears (3), intermediate shafts (4), output shafts (5), second driven gears (6), and output shaft gears (7) are symmetrically arranged on both sides of the half shaft (9).

7. The improved electrically driven axle transmission structure according to claim 1, wherein From the half shaft (9) to the left side thereof and from the half shaft (9) to the right side thereof, the output shaft (5), the intermediate shaft (4), and the input shaft (1) are sequentially arranged and are parallel to each other.

8. The improved electrically driven axle transmission structure according to claim 1, wherein, The arrangement direction of the first gear (2) to the second driving gear (3) is opposite to the arrangement direction of the second driven gear (6) to the output shaft gear (7).

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