WO2019062864A1

WO2019062864A1 - Integrated steering drive axle assembly and vehicle

Info

Publication number: WO2019062864A1
Application number: PCT/CN2018/108364
Authority: WO
Inventors: 刘辉跃; 刘广; 韦佳; 李双喜
Original assignee: 比亚迪股份有限公司
Priority date: 2017-09-30
Filing date: 2018-09-28
Publication date: 2019-04-04
Also published as: CN109591514A

Abstract

An integrated steering drive axle assembly (100), comprising: a drive axle (110); an electric power assembly, the electric power assembly comprising: a motor (120) and a transmission (130), the motor (120) having a motor output end, the transmission (130) having a transmission input end and a transmission output end, the motor output end being connected to the transmission input end; a differential (161), a left half shaft (162) and a right half shaft (163), a housing of the differential (161) being connected to the transmission output end, the differential (161) being connected to the left half shaft (162) and the right half shaft (163); the electric power assembly and the differential (161) are both integrated on the drive axle. Also provided is a vehicle having the integrated steering drive axle assembly (100). The use of the integrated steering drive axle assembly enables low energy consumption and use cost of the vehicle, and improves the use experience of the passengers.

Description

Integrated steering axle assembly and vehicle

Cross-reference to related applications

The present application claims the priority of the Chinese Patent Application No. "201710922697.1" filed on September 30, 2017 by the BYD Co., Ltd., entitled "Integrated Steering Drive Assemblies and Vehicles".

Technical field

The present disclosure relates to the field of vehicle technology, and in particular, to an integrated steering axle assembly and a vehicle.

Background technique

In the related art, the drive axle assembly belongs to a general fuel drive axle assembly, and the power source of the axle is the fuel power provided by the engine, and the power needs to pass through a power transmission structure of a transmission shaft, a universal joint, etc., which reduces the mechanical transmission. Efficiency is not conducive to the economic efficiency of energy use.

Summary of the invention

The present disclosure aims to solve at least one of the technical problems in the related art to some extent.

To this end, an object of the present disclosure is to provide an integrated steering axle assembly that can effectively improve the energy efficiency of the vehicle and reduce the loss of power during transmission.

Another object of the present disclosure is to provide a vehicle having the above-described integrated steering axle assembly.

An integrated steering axle assembly according to the present disclosure includes: a transaxle; an electric powertrain including: a motor and a transmission, the electric machine having a motor output, the transmission having a transmission input and a transmission output, the motor output being coupled to the transmission input; a differential, a left axle and a right axle, the outer casing of the differential being coupled to the transmission output, and the differential Connected to the left and right halves respectively; a steering assembly, wherein the electric power assembly, the differential, and the steering assembly are all integrated on the transaxle. (The differential is disposed inside the axle housing section 111 and cannot be shown. In Fig. 1, the differential is located between the axle housing rear cover 114 and the motor 120)

According to the integrated steering axle assembly of the present disclosure, by integrating components such as an electric power assembly and a differential on the transaxle, the loss of power during transmission can be greatly reduced, and the energy utilization rate of the vehicle is improved. This in turn reduces the cost of using the vehicle.

According to an embodiment of the present disclosure, the transaxle includes: a middle portion of the axle housing and a left axle housing and a right axle housing fork on the left and right sides of the middle portion of the axle housing.

According to an embodiment of the present disclosure, the middle portion of the axle housing includes: an upper half axle shell and a lower half axle shell, the upper half axle shell and the lower half axle shell are both stamped parts, and the upper half axle shell And the lower half axle shell is welded and fixed.

According to an embodiment of the present disclosure, the front side of the middle portion of the axle housing is welded and fixed with a front pad, and the rear side of the middle portion of the axle housing is welded and fixed with a rear pad, and the front pad is adapted to fix the electric power The assembly, the rear pad is adapted to fix the axle housing back cover.

According to an embodiment of the present disclosure, the electric power assembly further includes: an electric oil pump for the electric oil pump that cools the motor.

According to an embodiment of the present disclosure, the electric power assembly further includes: a case adapted to mount the motor and the transmission.

According to an embodiment of the present disclosure, the motor output is a motor output shaft, the transmission input is a gearbox input shaft, and the motor output shaft and the transmission input shaft are splined.

According to an embodiment of the present disclosure, the transmission input shaft is rotatably mounted on the case.

According to an embodiment of the present disclosure, the transmission input shaft is provided with a first transmission gear; the transmission further includes: a first transmission shaft and a second transmission shaft, and the second transmission shaft is fixedly disposed on the first transmission shaft a gear and a plurality of spaced apart third transmission gears, the second transmission gear meshing with the first transmission gear, and the second transmission shaft is provided with a plurality of spaced apart fourth transmission gears, a plurality of The fourth transmission gear is in one-to-one correspondence with the plurality of the third transmission gears and meshes with each other, and the second transmission shaft is further provided with a synchronizer for synchronously rotating the fourth transmission gear and the second transmission shaft.

According to an embodiment of the present disclosure, the second transmission shaft is provided with a fifth transmission gear, and the differential is provided with a sixth transmission gear, and the sixth transmission gear meshes with the fifth transmission gear.

According to an embodiment of the present disclosure, the first transmission gear, the second transmission gear, the third transmission gear, the fourth transmission gear, the fifth transmission gear, and the sixth transmission gear are both It is a helical gear.

According to an embodiment of the present disclosure, the integrated steering axle assembly further includes: a wheel reducer, the wheel reducer is two, and one of the wheel reducers is adapted to be connected to the left A half axle and a left side hub, wherein the other wheel side reducer is adapted to connect the right and right side hubs.

According to an embodiment of the present disclosure, the wheel reducer includes: a sun gear adapted to cooperate with the left half shaft or the right half shaft; a ring gear, the ring gear and the sun gear pass The planet wheels are connected and the ring gear is fixed to the hub.

According to an embodiment of the present disclosure, the steering assembly includes:

a left wheel yoke and a right wheel yoke, the left wheel yoke being rotatably disposed on the left axle yoke, the right wheel yoke being rotatably disposed on the right axle yoke on;

a left knuckle arm and a right knuckle arm fixedly disposed on an upper side of the left knuckle yoke, the right knuckle arm being fixedly disposed on an upper side of the right knuckle yoke;

a left steering trapezoidal arm and a right steering trapezoidal arm, the left steering trapezoidal arm is fixedly disposed on a lower side of the left wheel yoke, and the right steering trapezoidal arm is fixedly disposed at a lower side of the right steering yoke;

a left half shaft sleeve and a right half shaft sleeve fixed to the left wheel side fork, the right half shaft sleeve being fixed to the right wheel side fork, the left A half shaft and the right half shaft are rotatably disposed on the left and right axle bushings, respectively.

The vehicle according to the present disclosure includes the above-described integrated steering axle assembly, and since the vehicle according to the present disclosure is provided with the above-described integrated steering axle assembly, the energy consumption and the use cost of the vehicle are low, and the use of the occupant is improved. Feel.

The additional aspects and advantages of the present disclosure will be set forth in part in the description which follows.

DRAWINGS

1 is a schematic view of a transaxle assembly in accordance with an embodiment of the present disclosure;

2 is a schematic illustration of a transaxle assembly in accordance with an embodiment of the present disclosure;

3 is a schematic diagram of an electric powertrain assembly in accordance with an embodiment of the present disclosure;

4 is a schematic view of a drive axle mating with a steering assembly in accordance with an embodiment of the present disclosure;

5 is a schematic view of a transaxle mating with a steering assembly in accordance with an embodiment of the present disclosure;

6 is a schematic view of a wheel reducer in accordance with an embodiment of the present disclosure;

7 is a cross-sectional view of a steering assembly in accordance with an embodiment of the present disclosure;

Figure 8 is a schematic illustration of a brake assembly in accordance with one embodiment of the present disclosure;

9 is a cross-sectional view of a wheel reducer in accordance with an embodiment of the present disclosure;

Figure 10 is a schematic illustration of a transmission in accordance with one embodiment of the present disclosure;

11 is an exploded view of a wheel reducer in accordance with an embodiment of the present disclosure;

Figure 12 is a schematic illustration of a vehicle in accordance with one embodiment of the present disclosure.

Reference mark:

Vehicle 10,

Drive axle assembly 100,

Drive axle 110, axle housing middle section 111, upper half axle housing 111a, lower half axle housing 111b, front pad 111c, rear pad 111d, left axle housing fork 112, right axle housing fork 113, axle housing rear cover 114 ,

Motor 120,

The transmission 130, the transmission input shaft 131, the first transmission gear 131a, the first transmission shaft 132, the second transmission gear 132a, the third transmission gear 132b, the second transmission shaft 133, the fourth transmission gear 133a, and the fifth transmission gear 133b, Synchronizer 133c,

Electric oil pump 140, housing 150,

a differential 161, a sixth transmission gear 161a, a left half shaft 162, and a right half shaft 163,

Wheel reducer 170, sun gear 171, planet gear 172, planet carrier 173, ring gear 174, wheel reducer housing 175,

Steering assembly 180, left wheel yoke 181, right wheel yoke 182, left knuckle arm 183, right knuckle arm 184, left steering trapezoidal arm 185, right steering trapezoidal arm 186, left half shaft sleeve 187, right Half shaft sleeve 188,

Brake assembly 190.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative, and are not intended to be construed as limiting.

In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present disclosure and the simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the disclosure.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present disclosure, the terms "installation", "connected", "connected", "fixed", and the like, are to be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated or defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. The specific meanings of the above terms in the present disclosure can be understood by those skilled in the art on a case-by-case basis.

An integrated box drive axle assembly 100 of some embodiments of the present disclosure is described in detail below with respect to Figures 1-11.

The integrated box drive axle assembly 100 in accordance with the present disclosure includes a drive axle 110, an electric powertrain, a differential 161, a left axle half 162, and a right axle axle 163.

Wherein, the transaxle 110 is disposed at the end of the force transmission system, and the torque output by the electric power assembly can be transmitted to the driving wheel. The electric power assembly includes the motor 120 and the transmission 130. The motor 120 has a motor output end, and the transmission 130 has The transmission input end and the transmission output end are connected to the transmission input end, the outer casing of the differential 161 is connected to the transmission output end, and the differential 161 is respectively connected to the left half shaft 162 and the right half shaft 163, wherein the electric power The assembly and differential 161 are all integrated on the transaxle 110.

The differential is disposed inside the axle housing midsection 111, as in Fig. 1 the differential is located between the axle housing back cover 114 and the motor 120.

In the electric powertrain, the motor 120 can be connected to the battery to convert electrical energy into mechanical energy, the motor output can output torque, the motor output transmits torque to the transmission input, and the transmission 130 transmits torque through the gears. The torque is increased, the speed is reduced, and the torque is transmitted to the differential 161 through the transmission output, and the differential 161 transmits the torque to the left and

right axles

163, 162, respectively. The right half shaft 163 transmits torque to the wheels to rotate the wheels to advance or retreat the wheels.

The electric power assembly and the differential 161 are both integrated on the transaxle 110, and the electric power assembly and the differential 161 assembly are fixed together, and can be fixed on the transaxle 110 by a fixing device, through the gear of the electric power assembly. Directly connected to the differential 161, the power loss during the force transmission process is reduced, and the dynamic performance of the vehicle 10 is effectively improved.

According to the integrated steering axle assembly 100 of the present disclosure, the electric powertrain and the differential 161 are integrated on the transaxle 110, the transmission assembly is reduced in the force transmission structure, and the electric powertrain and the transaxle 110 are The transmission efficiency between the two is higher, and the weight of the whole vehicle is effectively reduced, and the performance of the whole vehicle is improved while saving the cost.

According to some embodiments of the present disclosure, the transaxle 110 includes a left axle housing yoke 112 and a right axle housing yoke 113 on the left and right sides of the axle housing midsection 111 and the axle housing middle section 111.

As shown in FIG. 4 and FIG. 7, the left axle housing section fork 112 is disposed at the left end of the axle housing middle section 111, and the right axle housing section fork 113 is disposed at the right end of the axle housing middle section 111, and the left axle housing section fork 112 and the right axle housing The joint between the fork 113 and the middle portion 111 of the axle housing is provided with a groove, a washer is arranged in the groove, the washer and the middle portion 111 of the axle shell are fixed by welding, and the washer at the left end is respectively connected with the middle portion 111 of the axle shell and the fork portion 112 of the left axle housing. Cooperating, the right end washers are respectively matched with the axle housing middle section 111 and the right axle housing yoke 113, and the gasket is arranged to improve the connection strength between the left axle housing yoke 112 and the right axle housing yoke 113, and the entire process is adjusted to enhance the whole The structural strength of the drive axle 110 helps to increase the load of the transaxle 110, and the left axle housing fork 112 and the right axle housing fork 113 are disposed on both sides of the axle housing mid section 111 to facilitate the rotation of other assemblies. The efficiency of mounting the transaxle 110 can be improved during the final assembly process.

According to some embodiments of the present disclosure, the axle housing midsection 111 includes an upper half axle housing 111a and a lower half axle housing 111b, the upper half axle housing 111a and the lower half axle housing 111b are stamped and the upper half axle housing 111a and the lower half axle The shell 111b welder is fixed.

The upper half axle shell 111a and the lower half axle shell 111b may be formed by stamping steel sheets. Since the upper half axle shell 111a and the lower half axle shell 111b are symmetrically arranged, they have the same structure, and the same mold can be used in the stamping process to reduce development. Cost, and by the stamped axle housing, the weight of the axle shell is lower than that of the cast cast axle shell with the same strength, and the upper half axle shell 111a and the lower half axle shell 111b are fixed by welding so that the entire axle shell mid section 111 The strength fully satisfies the strength requirements of the vehicle 10 for the transaxle 110.

Preferably, as shown in FIG. 5, a front pad 111c is welded and fixed on the front side of the intermediate portion 111 of the axle housing, and a rear pad 111d is welded to the rear side of the middle portion 111 of the axle housing, and the front pad 111c is adapted to fix the total electric power. The rear pad 111d is adapted to fix the axle housing back cover 114.

After the upper half axle housing 111a and the lower half axle housing 111b are welded, an installation space for connecting the electric power assembly to the left half shaft 162 and the right half shaft 163 is reserved at the intermediate position, and the front pad 111c may be configured as a ring. And the front pad 111c is provided with a threaded hole for connecting the electric power assembly. When the electric power assembly is mounted on the transaxle 110, the outer casing of the electric power assembly is in contact with the front pad 111c, and is passed through the bolt The housing of the electric power assembly is fixed on the front pad 111c to stabilize the connection between the electric power assembly and the transaxle 110, and the front pad 111c can improve the mounting stability of the electric power assembly, so that the electric power The assembly is more securely installed.

As shown in FIG. 1 and FIG. 4, the installation space formed by the upper half axle shell 111a and the lower half axle shell 111b (that is, the space at the center position of the axle housing) may be connected and closed to the electric power assembly, as shown in the figure. The opposite side of the axle housing back cover 114 of 1. The other side of the installation space may be exposed to the operator's field of view when the axle housing back cover 114 is not installed, and the electric power assembly and the transaxle 110 may be disposed from the side of the axle housing rear cover 114 from the side of the assembly. For assembly adjustment, the rear pad 111d extends rearward, and the rear pad 111d is provided with a threaded hole, and the axle housing rear cover 114 is correspondingly provided with a threaded hole, and the axle housing rear cover 114 can be fixed on the rear pad 111d. The axle housing rear cover 114 will close the middle portion 111 of the axle housing to seal the connection between the electric power assembly and the transaxle 110 to protect the transmission assembly between the electric power assembly and the transaxle 110.

According to some embodiments of the present disclosure, the electric power assembly further includes an electric oil pump 140 for cooling the electric motor 120, and a cooling water passage for cooling liquid circulation may be disposed on the outer casing of the electric motor 120, and the cooling water passage has a cooling water passage opening and a cooling water passage. At the outlet, an electric oil pump 140 is further disposed on the casing of the motor 120, and the electric oil pump 140 is used to power the flow of the coolant.

According to some embodiments of the present disclosure, a cooling oil may be employed as the cooling liquid, and the electric oil pump 140 may be connected to the battery, and the battery may provide a voltage required for the electric oil pump 140 to operate.

According to a specific embodiment of the present disclosure, the electric power assembly further includes a case 150 adapted to mount the motor 120 and the transmission 130, and the case 150 provides mounting controls for the installation of the motor 120 and the transmission 130, and can be used To protect the motor 120 and the transmission 130, the motor 120 and the transmission 130 can be better coupled to other components via the housing 150.

Further, the motor output end is the motor 120 output shaft, the transmission input end is the transmission input shaft, and the motor 120 output shaft and the transmission input shaft 131 are spline-connected, and the power output from the output shaft of the electric motor is transmitted to the transmission through the spline. The input shaft 131 makes the transfer process between the engine and the transmission 130 simple, and the torque that can be transmitted is larger, and the spline makes the connection manner of the output shaft of the motor 120 and the transmission input shaft 131 stable and reliable, and the vehicle 10 is reinforced. The integration rate enables more efficient production of the integrated steering axle assembly 100 in the production process.

Preferably, the spline on the output shaft of the motor 120 can be provided with an internal spline, and the transmission input shaft 131 can be provided with an external spline. The internal spline and the external spline can improve the stability of the electric power assembly.

Further, the transmission input shaft 131 is rotatably mounted on the casing 150, and the transmission input shaft 131 is fixed relative to the casing 150. The casing 150 may be provided with a needle bearing adapted to mount the transmission input shaft 131, and the rolling bearing The axis of the transmission input shaft 131 can be fixed and the transmission input shaft 131 can be rotated on the needle bearing to transmit torque to the other gear and force transmitting components.

The transmission input shaft 131 is provided with a first transmission gear 131a. The transmission 130 further includes a first transmission shaft 132 and a second transmission shaft 133. The first transmission shaft 132 is fixedly disposed with a second transmission gear 132a and a plurality of spaced apart portions. The third transmission gear 132b, the second transmission gear 132a is meshed with the first transmission gear 131a, and the second transmission shaft 133 is provided with a plurality of spaced apart fourth transmission gears 133a, a plurality of fourth transmission gears 133a and a plurality of third transmissions The gears 132b are in one-to-one correspondence and mesh with each other, and the second transmission shaft 133 is further provided with a synchronizer 133c for rotating the fourth transmission gear 133a and the second transmission shaft 133 in synchronization.

The first transmission gear 131a meshes with the second transmission gear 132a to transmit torque from the transmission input shaft 131 to the first transmission shaft 132, and the torque on the first transmission shaft 132 can pass through the third transmission gear 132b and the fourth transmission gear. The engagement of 133a is transmitted, the radii of the plurality of third transfer gears 132b on the first drive shaft 132 are different, and the radii of the plurality of fourth transfer gears 133a on the second drive shaft 133 are different to achieve different gear ratios.

The synchronizer 133c can fix any one of the fourth transmission gears 133a and the second transmission shaft 133 to transmit the torque to the second transmission shaft 133 through the first transmission shaft, wherein the transmission process can be from the first transmission shaft The transmission to any of the third transmission gears 132b to the corresponding fourth transmission gears 133a is again transmitted to the second transmission shaft 133 through the synchronizer 133c. The transmission 130 has a plurality of different transmission ratios, which can satisfy the different torques and rotational speeds of the vehicle 10.

Further, a fifth transmission gear 133b is disposed on the second transmission shaft 133, and a sixth transmission gear 161a is disposed on the differential 161, and the sixth transmission gear 161a is meshed with the fifth transmission gear 133b.

The second transmission shaft 133 fixes any one of the fourth transmission gears 133a by the synchronizer 133c to obtain a corresponding torque, the fifth transmission gear 133b is fixed to the second transmission shaft 133, and the fifth transmission gear transmits the torque to the sixth. The transmission gear 161a, that is, the torque after shifting through the transmission 130, is transmitted to the differential 161, and the engagement between the fifth transmission gear 133b and the sixth transmission gear 161a reduces the relationship between the transmission 130 and the differential 161. The force transmission component avoids the loss of power during the transmission process, further reduces the weight of the integrated steering axle assembly 100, can reduce the weight of the whole vehicle, and saves the cost and improves the dynamic performance of the vehicle 10.

Preferably, the first transmission gear 131a, the second transmission gear 132a, the third transmission gear 132b, the fourth transmission gear 133a, the fifth transmission gear 133b, and the sixth transmission gear 161a are all helical gears, and the helical gears can be integrated. The steering axle assembly 100 has better meshing performance, and the helical gear can make the transmission smooth and the noise is small, and the helical gear has a large carrying capacity and a long service life compared with the ordinary gear.

According to some embodiments of the present disclosure, the integrated steering axle assembly 100 further includes a wheel reducer 170 having two wheel reducers 170, one of which is adapted to connect the left axle 162 and the left side a hub, wherein the other wheel reducer 170 is adapted to connect the right half shaft 163 and the right side hub, and the wheel reducer 170 can reduce the rotational speed of the left half shaft 162 or the right half shaft 163 and increase the torque to make the speed reducer The connected wheels have sufficient torque.

Further, the wheel reducer 170 includes a sun gear 171 and a ring gear 174, the sun gear 171 is adapted to cooperate with the left half shaft 162 or the right half shaft 163, and the ring gear 174 is coupled to the sun gear 171 via the planet gear 172, the ring gear 174 Fixed to the hub.

The sun gear 171 transmits power from the left half shaft 162 or the right half shaft 163 to the plurality of planet gears 172, the planetary gears 172 mesh with the ring gear 174, and the plurality of planet wheels 172 can be rotatably disposed on the planets through the needle bearings On the frame 173, the carrier 173 can be fixed on the transaxle 110, and the planetary gear 172 transmits power to the ring gear 174. The outer side of the ring gear 174 is provided with a reducer housing, and the reducer housing is fixed on the hub, so that the power can be transmitted. For the hub, the reducer housing has a lower rotational speed relative to the left half shaft 162 or the right half shaft 163 and a higher torque.

The wheel reducer 170 may have a wheel reducer housing 175, and the wheel reducer housing 175 may be coupled to the ring gear 174 by bolts. The ring gear 174 may be loosened by a lock washer, and the wheel reducer housing 175 may be The hub is connected by bolts, and the torque is transmitted from the electric powertrain through the transaxle 110, the left half shaft 162 or the right half shaft 163, and the wheel reducer 170 to the hub, so that the wheel has a forward driving torque.

According to some embodiments of the present disclosure, the integrated steering axle assembly 100 further includes a steering assembly 180 that includes a left wheel yoke 181 and a right wheel yoke 182, a left knuckle arm 183 and a right knuckle Arm 184, left half shaft sleeve 187 and right half shaft sleeve 188.

The left wheel yoke 181 is rotatably disposed on the left axle housing yoke 112, and the right wheel yoke 182 is rotatably disposed on the right axle housing yoke 113; the left knuckle arm 183 is fixedly disposed on the left wheel yoke 181 Upper right knuckle arm 184 is fixedly disposed on right knuckle fork; left half shaft sleeve 187 is fixed on left wheel yoke 181, and right half shaft sleeve 188 is fixed on right wheel yoke 182, left half shaft The 162 and right half shafts 163 are rotatably disposed on the left and

right side sleeves

187, 188, respectively.

Specifically, the left wheel yoke 181 is disposed on the left side of the transaxle 110, and the left wheel yoke 181 is rotatable relative to the transaxle 110, and the upper side of the left rim 181 is provided with a left knuckle arm 183 for The steering rod is connected, and the steering rod can transmit the power of the steering to the left wheel yoke 181 to rotate the left wheel yoke 181. The lower side of the left wheel yoke 181 is provided with a left steering trapezoidal arm 185, and the left steering trapezoidal arm 185 can be Connected to the tie rod to synchronize the left steering fork with the right steering fork.

Preferably, the upper side of the left knuckle arm 183 may be provided with a fixing block for reinforcing the connection portion of the left knuckle arm 186 and the steering rod, and adding the strength of the left knuckle arm 183 to improve the steering of the wheel. Sexually, the life of the left knuckle arm 183 is effectively extended. Similarly, the right knuckle arm 184 of the right side of the transaxle 110 is fixed in a manner similar to the above-described fixing.

The end of the left half shaft sleeve 187 may be provided with a spline, and the left half shaft sleeve 187 may be coupled to the sun gear on the wheel reducer 170 by splines to transmit the torque from the left half shaft 162 to the wheel side. Reducer 170. The fixing manner of the right half shaft sleeve 188 is similar to the above fixing manner, and details are not described herein again.

The right wheel yoke 182 is disposed on the right side of the transaxle 110, and the right wheel yoke 182 is rotatable relative to the transaxle 110, and the upper side of the right wheel yoke 182 is provided with a right knuckle arm 184 for The steering rod is connected, and the steering rod can transmit the power of the steering to the right wheel yoke 182 to rotate the right wheel yoke 182. The lower side of the right wheel yoke 182 is provided with a right steering trapezoidal arm 186 and a right steering trapezoid The arm 186 can be coupled to the tie rod to synchronize the right steering fork with the left steering fork.

According to some embodiments of the present disclosure, the transaxle 110 is mainly welded, and the middle portion 111 of the axle housing is mainly an upper half axle shell 111a stamped by two steel plates, and the lower half axle shell 111b is first welded, the front gasket 111c The rear pad 111d and the four leaf spring mounting limiting seats are also welded and fixed on the middle portion 111 of the axle housing. The middle portion 111 of the axle housing using the steel plate stamping and welding structure is much lighter than the cast axle housing.

The joint between the left axle shell fork 112 and the right axle shell fork 113 and the middle portion 111 of the axle shell is over-tilted, and is welded through the middle washer and the middle portion 111 of the axle shell. This welding method has high strength and good rigidity after welding. Can withstand large loads. The left half shaft 162 and the right half shaft 163 pass through the needle bearing, the rim for the hole, and the two rubber oil seals respectively mounted on the left axle housing yoke 112 and the right axle housing yoke 113, thereby the left half shaft 162. The right half shaft 163 is fixed to the left axle housing fork 112 and the right axle housing fork 113 for support, and the sealing performance is good.

The upper and lower sides of the left axle housing fork 112 and the right axle housing fork 113 are press-fitted with an upper kingpin, a lower kingpin, and an upper kingpin that are interference-fitted with the left axle housing fork 112 and the right axle housing fork 113. The sleeve is placed over the copper sleeve and the upper sleeve is passed through the copper sleeve, the thrust roller bearing and the combined oil seal. The left wheel yoke 181 and the right wheel yoke 182 are respectively fixed up and down by bolts, and a plurality of long bolts may be respectively passed through the left knuckle arm 183 and the right knuckle arm 184, the fixed block and the left wheel yoke 181 or right. The wheel yoke 182 reinforces the unitary structure, and the lower side may employ a plurality of bolts through the left turn trapezoidal arm 185 and the right turn trapezoidal arm 186 to secure it to the left and right wheel yokes 181, 182.

A vehicle having an integrated steering axle assembly 100 of the present disclosure is briefly described below. Figure 12 is a schematic illustration of a vehicle in accordance with one embodiment of the present disclosure. The vehicle 10 includes an integrated steering axle assembly 100. The integrated steering axle assembly 100 can be referred to the drawings and descriptions of FIGS. 1 to 11 . To avoid repetition, details are not described herein again.

An integrated steering axle assembly 100 according to the present disclosure is provided on a vehicle according to the present disclosure, since the integrated steering axle assembly 100 according to the present disclosure is provided on a vehicle according to the present disclosure, the vehicle weight of the vehicle Light, high transmission efficiency and high degree of integration.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material, or feature is included in at least one embodiment or example of the present disclosure. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification and features of various embodiments or examples may be combined and combined without departing from the scope of the invention.

While the embodiments of the present disclosure have been shown and described above, it is understood that the foregoing embodiments are illustrative and are not to be construed as limiting the scope of the disclosure The embodiments are subject to variations, modifications, substitutions and variations.

Claims

An integrated steering axle assembly is characterized by comprising:

Drive axle;

An electric powertrain comprising: a motor and a transmission, the electric machine having a motor output, the transmission having a transmission input and a transmission output, the motor output being coupled to the transmission input;

a differential, a left half shaft and a right half shaft, the outer casing of the differential being connected to the transmission output end, and the differential being respectively connected to the left half shaft and the right half shaft;

A steering assembly, wherein the electric power assembly, the differential, and the steering assembly are all integrated on the transaxle.
The integrated steering axle assembly according to claim 1, wherein the drive axle comprises: a middle portion of the axle housing and a left axle housing fork and a right axle housing fork on the left and right sides of the middle portion of the axle housing.
The integrated steering axle assembly according to claim 2, wherein the middle portion of the axle housing comprises: an upper half axle shell and a lower half axle shell, wherein the upper half axle shell and the lower half axle shell are both Stamping, and the upper half axle shell and the lower half axle shell are welded and fixed.
The integrated steering axle assembly according to claim 2 or 3, wherein the front side of the middle portion of the axle housing is welded and fixed with a front pad, and the rear side of the middle portion of the axle housing is welded and fixed with a rear pad. The front pad is adapted to secure the electric power assembly, and the rear pad is adapted to fix the axle housing back cover.
The integrated steering axle assembly according to any one of claims 1 to 4, wherein the electric power assembly further comprises: an electric oil pump for cooling the motor.
The integrated steering axle assembly according to any one of claims 1 to 5, wherein the electric power assembly further comprises: a case adapted to mount the motor and the transmission .
The integrated steering axle assembly of claim 6 wherein said motor output is a motor output shaft, said transmission input is a gearbox input shaft, said motor output shaft and said transmission input shaft Connected by splines.
The integrated steering axle assembly of claim 7 wherein said transmission input shaft is rotatably mounted to said housing.
The integrated steering axle assembly according to claim 8, wherein the transmission input shaft is provided with a first transmission gear;

The transmission further includes: a first transmission shaft and a second transmission shaft, wherein the first transmission shaft is fixedly disposed with a second transmission gear and a plurality of spaced apart third transmission gears, the second transmission gear and the The first transmission gear is meshed, and the second transmission shaft is provided with a plurality of spaced apart fourth transmission gears, and the plurality of the fourth transmission gears are in one-to-one correspondence with the plurality of the third transmission gears and mesh with each other. The second transmission shaft is further provided with a synchronizer for rotating the fourth transmission gear and the second transmission shaft synchronously.
The integrated steering axle assembly according to claim 9, wherein said second transmission shaft is provided with a fifth transmission gear, and said differential transmission is provided with a sixth transmission gear, said sixth transmission A gear meshes with the fifth transmission gear.
The integrated steering axle assembly according to claim 10, wherein said first transmission gear, said second transmission gear, said third transmission gear, said fourth transmission gear, said fifth The transmission gear and the sixth transmission gear are both helical gears.
The integrated steering axle assembly according to any one of claims 1 to 11, further comprising: a wheel reducer, the wheel reducer being two, and one of the wheel sides being decelerated The gear is adapted to connect the left and left side hubs, and the other of the wheel reducers is adapted to connect the right and right side hubs.
The integrated steering axle assembly of claim 12, wherein the wheel reducer comprises:

a sun gear adapted to cooperate with the left half shaft or the right half shaft;

a ring gear, the ring gear being coupled to the sun gear by a planet gear, and the ring gear being fixed to the hub.
The integrated steering axle assembly according to any one of claims 1 to 13, wherein the steering assembly comprises:

a left wheel yoke and a right wheel yoke, the left wheel yoke being rotatably disposed on the left axle yoke, the right wheel yoke being rotatably disposed on the right axle yoke on;

a left knuckle arm and a right knuckle arm fixedly disposed on an upper side of the left knuckle yoke, the right knuckle arm being fixedly disposed on an upper side of the right knuckle yoke;

a left steering trapezoidal arm and a right steering trapezoidal arm, the left steering trapezoidal arm is fixedly disposed on a lower side of the left wheel yoke, and the right steering trapezoidal arm is fixedly disposed at a lower side of the right steering yoke;

a left half shaft sleeve and a right half shaft sleeve fixed to the left wheel side fork, the right half shaft sleeve being fixed to the right wheel side fork, the left A half shaft and the right half shaft are rotatably disposed on the left and right axle bushings, respectively.
A vehicle characterized by comprising the integrated steering axle assembly of any of claims 1-14.