CN116653587A

CN116653587A - Driving axle capable of driving and converting and vehicle

Info

Publication number: CN116653587A
Application number: CN202310567983.6A
Authority: CN
Inventors: 冯涛; 张俊田
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-08-29

Abstract

The application relates to a drive axle capable of driving conversion and a vehicle, wherein the drive axle comprises: a coupling disposed along a first axis, comprising: a first end; the second end is in transmission connection with the rear axle assembly; a first clutch in driving connection with the input member, the first clutch being configured to be movable along a first axis between a first locked position and a first unlocked position; when the first clutch piece is positioned at the first locking position, the first clutch piece is used for connecting the input piece with the first end in a transmission way, so that the input piece is coaxially connected with the rear axle assembly through the coupler; the first clutch is separable from the first end when the first clutch is in the first unlocked position. The middle axle component and the rear axle component are coaxially connected, the mechanism saves the arrangement space in the vehicle, reduces the total weight and the manufacturing cost of the vehicle, has a simple transmission structure, and realizes the drive conversion between the middle axle and the rear axle by arranging the coupler.

Description

Driving axle capable of driving and converting and vehicle

Technical Field

The application relates to the field of axles, in particular to a driving axle capable of driving and converting and a vehicle.

Background

The torque to be transmitted is greater inside the heavy duty commercial vehicle than in the normal commercial vehicle, so a more powerful engine is selected, which has a higher requirement on the drive train, where the drive axle plays a critical role.

The traditional heavy commercial vehicle adopts double drive axles, namely adopts the technology of combining the middle axle drive with the rear axle drive, wherein, the middle axle drive technology adopts the structural design of double parallel shafts, and the structure of double parallel shafts needs to occupy bigger vehicle internal arrangement space to further increase the weight and the cost of heavy vehicle, and the double parallel shafts structure needs complicated transmission structure cooperation, so that the whole transmission efficiency of the drive axle is lower, and simultaneously, in the double drive axle structure in the related art, the drive conversion structure between the middle axle and the rear axle is too complex.

Disclosure of Invention

Accordingly, it is necessary to provide a drive axle and a vehicle having a drive conversion function, high transmission efficiency, a compact structure, and low cost.

In one aspect, a drive axle for a vehicle is provided, including a center axle assembly and a rear axle assembly, the center axle assembly comprising:

an input member rotatable about a first axis; a kind of electronic device with high-pressure air-conditioning system

A coupling disposed along a first axis, the coupling comprising:

a first end;

the second end is in transmission connection with the rear axle assembly;

a first clutch in driving connection with the drive member, the first clutch being configured to be movable along a first axis between a first locked position and a first unlocked position; when the first clutch member is positioned at the first locking position, the first clutch member is used for connecting the input member with the first end in a transmission way, so that the input member is coaxially connected with the rear axle assembly through the coupler; the first clutch member is separable from the first end when the first clutch member is in the first unlocked position.

In one embodiment, the axle assembly further comprises a wheel axle, the coupling further comprises a drive cavity, the drive cavity is located between the first end and the second end, the wheel axle is disposed through the drive cavity along a second axis, and the second axis is disposed intersecting the first axis.

In one embodiment, the coupling comprises:

the first connecting gear is arranged at the first end, and when the first clutch piece is positioned at the locking position, the first clutch piece is used for connecting the input piece and the first connecting gear in a transmission way;

the second connecting gear is arranged at the second end and is connected with the rear axle assembly;

the first planetary gear set is respectively connected with the first connecting gear and the second connecting gear, and the transmission cavity penetrates through the planetary gear set along the second axis.

In one embodiment, the first planetary gear set includes:

a carrier connecting the first connecting gear and the second connecting gear;

the planetary gear is connected with the planetary carrier, one end of the planetary gear is meshed with the first connecting gear, and the other end of the planetary gear is meshed with the second connecting gear; the planetary gears are at least two, the two planetary gears are arranged on two opposite sides of the planet carrier at intervals along the direction of the first axis, and the transmission cavity is positioned between the opposite planetary gears.

In one embodiment, the first clutch member includes a first splined portion in driving connection with the input member and a second splined portion in driving connection with the first connecting gear when the first clutch member is in the locked position.

In one embodiment, the intermediate axle assembly further comprises a first differential drivingly connected to the input member, the first differential comprising a first output member outputting a first motion and a second output member outputting a second motion; the first output piece is in transmission connection with the wheel shaft; the second output piece is in transmission connection with the rear axle assembly.

In one embodiment, the first output member is sleeved outside the second output member, and the second output member is at least partially sleeved outside the input member.

In one embodiment, the first differential further comprises:

the second planetary gear set is in transmission connection with the input piece and comprises a first transmission part and a second transmission part which move under the action of the input piece; the first transmission part is in transmission connection with the first output piece, and the second transmission part is in transmission connection with the second output piece; a kind of electronic device with high-pressure air-conditioning system

A second clutch in driving connection with the input member and configured to be movable along a first axis relative to the input member between a second locked position and a second unlocked position, the clutch in driving connection with one of the first and second output members with the input member when the clutch is in the second locked position such that one of the first and second output members is rotatable in synchronism with the input member and the other is rotatable in synchronism with the input member through the planetary gear set; the clutch member is separable from the first output member or the second output member when the clutch member is in the second unlocked position.

In one embodiment, the first clutch member is located at the first locking position when the second clutch member is located at the second locking position

In one aspect, a vehicle is provided with the drive axle capable of driving and switching.

The application has the advantages that the coupling is arranged, so that the middle axle assembly and the rear axle assembly are coaxially connected, the power is transmitted to the wheel axle by the middle axle assembly through the coupling arranged along the first axis, and meanwhile, the coaxial connection of the front axle assembly and the rear axle assembly is not influenced; the application can drive the drive axle to drive the middle axle and the rear axle through arranging the coupler.

Drawings

Fig. 1 is a schematic view of a portion of a driving axle according to an embodiment of the application.

Fig. 2 is a schematic cross-sectional view of a portion of a middle bridge assembly according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of a coupling according to an embodiment of the application.

Fig. 4 is an exploded view of a coupling according to an embodiment of the present application.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, 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, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The motor vehicle drive axle is at the end of the motor vehicle drive train for increasing the torque transmitted from the drive shaft and distributing the power reasonably to the different drive wheels, and in addition to being subjected to vertical, longitudinal and transverse forces acting between the road surface and the frame or body.

In the prior art, a middle axle assembly adopts a structure of two parallel shafts, one of the two parallel shafts is an input power shaft, an interaxial differential mechanism is coaxially arranged on the input power shaft, and the input power shaft and a driving part of a rear axle assembly are coaxially arranged; the other of the two parallel shafts is a middle axle driving shaft. The two parallel shafts of the intermediate axle assembly are connected by a gear pair. The structure of the double parallel shaft needs to occupy larger arrangement space in the automobile, the total weight and the manufacturing cost of the automobile are increased, meanwhile, the structure of the two shafts needs to be provided with more transmission parts by the middle bridge assembly, and the efficiency of transmitting motion is lower.

In order to solve the problems of complex structure, low transmission efficiency, large occupied space, high cost and no driving conversion of the traditional driving axle, the application designs the driving axle with the center axle component and the rear axle component coaxially connected, and the driving conversion can be carried out between the center axle and the rear axle. The driving axle has high transmission efficiency, compact structure, small occupied space in the vehicle and low total weight and cost of the vehicle adopting the driving axle.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a driving axle capable of driving and switching in an embodiment of the application. An embodiment of the present application provides a transaxle 1, including a center axle assembly 10, a rear axle assembly 20, and a transmission assembly 30 drivingly connecting the center axle assembly 10 and the rear axle assembly 20. In the present embodiment, the center axle assembly 10 and the rear axle assembly 20 simultaneously output driving forces, and the center axle assembly 10 and the rear axle assembly 20 respectively output required power to the corresponding wheel assemblies, thereby realizing a driving function.

The center bridge assembly 10 is used to transfer forces in all directions between the frame and the front wheels, and bending moments and torques generated thereby, and is typically distributed evenly about the middle of the vehicle. The rear axle assembly 20 is used to transfer forces in all directions between the frame and the rear wheels, and bending moments and torques generated thereby, are typically distributed evenly over the rear end of the vehicle. In the present application, the intermediate axle assembly 10 and the rear axle assembly 20 may be used as the drive axles for outputting power at the same time in some states, and one of the intermediate axle assembly 10 and the rear axle assembly 20 may be selected as the drive axle in some states, and the other may be driven. The middle axle assembly 10 and the rear axle assembly 20 are integrated, so that the arrangement of a transmission mechanism of the automobile drive axle is more compact, the weight of the automobile drive axle is reduced, the light design is realized, the cost of the automobile drive axle is reduced, and the realization of batch production and practical application is facilitated. In other embodiments, a front axle assembly may also be included, which may also act as a drive axle for the output power.

In the present embodiment, the transaxle 1 is described taking the internal structure of the transaxle assembly 10 as an example. In some embodiments, the intermediate axle assembly 10 is similar in structure to the rear axle assembly 20, and includes a first differential, a second differential, a coupling, etc. that are similar in structure, and will not be described again.

The intermediate axle assembly 10 includes an input member 12, a front wheel axle 13, a first differential 200, a drive member 11, a second differential 14, and a coupling 100. The input member 12 is connected to a power source and is rotatable about a first axis 10a under the influence of the power source to provide rotational force to other components of the axle assembly 10. The first differential 200 is disposed between the other components of the intermediate axle assembly 10 and the rear axle assembly 20, and the first differential 200 is an inter-axle differential. The first differential 200 has one end connected to the input member 12 and the other end connected to the driving member 11 and the coupling 100, respectively, to transmit the motion of the input member 12 to the driving member 11 and to the rear axle assembly 20 through the coupling 100, respectively. The driving member 11 is connected to a second differential 14, and is connected to the front wheel axle 13 via the second differential 14.

The input member 12, the driving member 11, the first differential 200, and the coupling 100 are all disposed along a first axis 10 a. Specifically, the central axes of the input member 12 and the driving member 11 coincide with the first axis 10 a. The axle assembly 10 is configured to actively output a driving force to a corresponding wheel (not shown) of the axle assembly 10, and in particular, the input member 12 rotates about the first axis 10a to drive the driving member 11 to rotate about the first axis 10 a. The first differential 200 drivingly connects the input member 12 and the driving member 11, the first differential 200 being operable to move the rear axle assembly 20 and the front wheel axle 13, respectively, at different rotational speeds, the first differential 200 acting as an inter-axle differential. The driving element 11 is in driving connection with a second differential 14, the second differential 14 being connected to the end of the front wheel axle 13 that extends out of the coupling 100, in particular the second differential 14 being arranged coaxially with the front wheel axle 13. The wheels are connected to the two ends of the front wheel axle 13, and the second differential 14 can rotate the wheels at the two ends of the front wheel axle 13 at different rotation speeds, and the second differential 14 serves as an inter-wheel differential.

Referring now to fig. 2, fig. 2 is a schematic view of a portion of a center bridge assembly 10 for a vehicle in accordance with an embodiment of the present application. The input member 12 is coaxially connected to the rear axle assembly 20 via the first differential 200 and the coupling 100 in this order, and the output member of the first differential 200 serves as the power input of the coupling 100.

As shown in fig. 3 and 4, the coupling 100 includes a first end 101, a second end 102, and a drive cavity 103. The first end 101 is selectively drivingly connected to the input member 12 and the second end 102 is connected to the rear axle assembly 20. Specifically, first end 101 is selectively coupled to first differential 200 and second end 102 is coupled to drive assembly 30.

A drive chamber 103 is located between the first end 101 and the second end 102, the drive chamber 103 being adapted to receive the front axle 13, i.e. the drive chamber 103 is adapted to pass the front wheel axle 13 through the coupling 100 in the direction of the second axis 10 b. In this embodiment, the central axis 10b of the front wheel axle 13 is perpendicular to the first axis 10 a. In particular, the conical tooth surface of the driving member 11 has an inclination angle of 45 °, and correspondingly, the differential 14 includes a conical tooth surface having an inclination angle of 45 °. After the driving member 11 is engaged with the differential 14, the first axis 10a and the second axis 10b are perpendicular.

The first end 101 and the second end 102 of the coupling 100 are disposed in sequence along the first axis 10a such that the input member 12, the first differential 200, and the transmission assembly 30 after coupling the coupling 100 are disposed along the first axis 10a, thereby coaxially disposing the intermediate axle assembly 10 and the rear axle assembly 20. By providing the coupling 100, the intermediate axle and rear axle assembly 20 of the present application is coaxially disposed, requiring less space for arrangement in the vehicle, and reducing the overall weight and manufacturing cost of the vehicle, while the transaxle 1 of the present application requires fewer transmission components, thereby improving transmission efficiency.

The coupling 100 includes a first connecting gear 110, a second connecting gear 120, a first planetary gear set 130, and a first clutch 140. The first clutch member 140 and the first connecting gear 110 are disposed at the first end 101 of the coupling 100. The first connecting gear 110 is selectively connectable with the first differential 200, and thus with the input member 12, via the first clutch member 140, and is capable of following movement of the input member 12. A second connecting gear 120 is disposed at the second end 102 of the coupling 100, the second connecting gear 120 being coupled to the transmission assembly 30 and being capable of transmitting movement of the input member 12 to the transmission assembly 30. Specifically, the second connecting gear 120 has an internal tooth portion 121 formed therein, and the internal tooth portion 121 is in driving connection with the transmission assembly 30. The first planetary gear set 130 is disposed between the first end 101 and the second end 102, the first planetary gear set 130 drivingly connects the first connecting gear 110 and the second connecting gear 120 and is capable of transmitting movement of the first connecting gear 110 to the second connecting gear 120. Further, the first planetary gear set 130 forms a supporting structure of the coupling 100, a transmission cavity 103 is formed in the middle of the first planetary gear set 130, and the first connecting gear 110 and the second connecting gear 120 are respectively disposed at two ends of the transmission cavity 103. By providing the coupling 100 with the transmission cavity 103, the coupling 100 can be disposed between the wheel axle 13, the transmission assembly 30 and the input member 12, enabling coaxial arrangement of the intermediate axle assembly 10 and the rear axle assembly 20, and saving space for the intermediate axle assembly 10 and improving transmission efficiency.

The first clutch member 140 is in driving connection with the input member 12, the first clutch member 140 being configured to be movable along the first axis 10a between a first locked position and a first unlocked position. When the first clutch member 140 is in the first locked position, the first clutch member 140 drivingly connects the input member 12 with the first end 101 such that the input member 12 is coaxially coupled to the rear axle assembly 20 via the coupling 100, and further such that the rear axle assembly 20 and the intermediate axle assembly 10 rotate in unison. When the first clutch member 140 is in the first unlocked position, the first clutch member 140 can be disengaged from the first end 101.

The first differential 200 includes an output member 220. The output member 220 includes a first output member 221 and a second output member 222, respectively, which are movable about the first axis 10a, the first output member 120 and the second output member 130 being spaced apart. The first output member 221 outputs a first motion, i.e., a motion having a first rotational speed about the first axis 10a, and the second output member 222 outputs a second motion, i.e., a motion having a second rotational speed about the first axis 10 a. The first output member 221 is in driving connection with the front wheel axle 13 and the second output member 222 is in driving connection with the first end 101.

The first clutch member 140 is drivingly connected to the second output member 222 and is movable relative to the second output member 222 along the first axis 10a between a first locked position and a first unlocked position. Specifically, the first clutch member 140 is sleeved at one end of the second output member 222, and when the first clutch member 140 is located at the first locking position, the first connecting gear 110 and the second output member 222 can be in transmission connection. The first clutch member 140 includes a first splined portion 141 and a second splined portion 142, the first splined portion 141 being in driving connection with the input member 220, the second splined portion 142 being in driving connection with the first connecting gear 110 when the first clutch member 140 is in the locked position. Specifically, the first spline portion 141 is in driving connection with a spline structure corresponding to the second output member 142, and when the first clutch member 140 is located at the first locking position, the second spline portion 142 is in driving connection with a spline structure corresponding to the first connecting gear 110.

When the first clutch member 140 is located at the first locking position, the second output member 222 is in driving connection with the first connecting gear 110 through the clutch member 140, and the second output member 222, the clutch member 140, the first connecting gear 110 and the second connecting gear 120 synchronously rotate, so that the intermediate axle assembly 10 drives the rear axle assembly 20 to move. When the first clutch member 140 is in the first unlocked position, the second output member 222 is disengaged from the first connecting gear 110, and the intermediate axle assembly 10 and the rear axle assembly 20 are disconnected from each other, such that the intermediate axle assembly 10 and the rear axle assembly 20 can each act as independent drive axles. By arranging the first clutch 140, the double-bridge driving can be actively switched to be converted into the intermediate-bridge independent driving, and the idle transmission efficiency is improved.

The first differential 200 also includes a second planetary gear set 230 and a second clutch 210. The second planetary gear set 230 is in driving connection with the input member 12, the second planetary gear set 230 including a first transmission portion and a second transmission portion that move under the influence of the input member 12. The first output member 221 is in driving connection with the first transmission portion, and the second output member 222 is in driving connection with the second transmission portion. The second clutch member 210 is configured to be movable along the first axis 10a between a second locked position and a second unlocked position, and when the second clutch member 210 is in the second locked position, the second clutch member 210 is coupled to one of the first output member 221 or the second output member 222 such that both the first output member 221 and the second output member 222 are capable of rotating in synchronization with the input member 12, when the first rotational speed output by the first output member 221 is equal to the second rotational speed output by the second output member 222. When the second clutch member 210 is located at the unlock position, the second clutch member 210 can be separated from the first output member 221 or the second output member 222, and at this time, the first rotation speed output by the first output member 221 and the second rotation speed output by the second output member 222 may be equal or unequal. The second clutch member 210 is used to lock the differential function of the first differential 200, and in particular, the second clutch member 210 acts on the output member 220 and the second planetary gear set 230 to lock or unlock the differential function of the differential. The components of the first differential 200 are arranged along the direction of the first axis 10a, so that the power loss caused by component force in other directions is reduced, and the overall transmission efficiency is improved.

The second planetary gear set 230 is disposed between the first output member 221 and the second output member 222 in spaced apart relation. The first output member 221 is sleeved outside the second output member 222, and the second output member 221 is at least partially sleeved outside the input member 12. In the present embodiment, the first output member 221 is in driving connection with the first transmission portion at one end and in some cases in driving connection with the second clutch member 210, and in driving connection with the driving member 11 at the other end. The second output member 222 is drivingly connected to the second drive at one end and via the first clutch member 140 at the other end in some cases. Further, when the first clutch member 140 is located at the first locking position, the second clutch member 210 needs to be located at the second locking position to achieve synchronous rotation of the intermediate axle assembly 10 and the rear axle assembly 20.

As shown in fig. 3, the first planetary gear set 130 includes a carrier, a planetary gear 133, and a planetary axle 134 connecting the carrier and the planetary gear 133. The planetary carriers are connected to the first connecting gear 110 and the second connecting gear 120, respectively. The planetary gears 133 are connected to the planet carrier via planetary axles 134 and are arranged on both sides of the transmission chamber 103.

The first connection gear 110 is externally formed with an external gear part 112, one end of the planetary gear 133 is engaged with the external gear part 112 of the first connection gear 110, the second connection gear 120 is externally formed with an external gear part 122, and the other end of the planetary gear 133 is engaged with the external gear part 122 of the second connection gear 120. Motion is transferred from the first connecting gear 110 to the second connecting gear 120 through the first planetary gear set 130.

Further, the first connecting gear 110 is composed of a spline gear 115 and a transmission gear 114 which are sleeved, and the spline gear 115 and the transmission gear 114 are connected through a spline structure. The spline gear 115 is formed with a spline structure corresponding to the second spline portion 142. The transfer gear 114 is provided with a gear structure that meshes with the planetary gears 133. A retainer ring for limiting is arranged between the spline gear 115 and the transmission gear 114.

The planet carrier comprises a first planet carrier 131 and a second planet carrier 132, and the first planet carrier 131 and the second planet carrier 132 are fixedly connected. The first and second carriers 131 and 132 are similar in structure and may be symmetrically disposed. The first planet carrier 131 and the second planet carrier 132 are fixedly connected through bolts. By providing the first carrier 131 and the second carrier 132, each structure of the first planetary gear set 130 is made easier to install.

Specifically, the first carrier 131 is provided with a first connection portion 1312 and a first base portion 1311, and the first base portion 1311 is formed with a first connection hole 1313 and a second connection hole 1314. In this embodiment, the first connecting portion 1312 is provided with a plurality of corresponding planetary gears 133 for limiting the plurality of corresponding planetary gears. Specifically, the number of first connecting portions 1312 is greater than the number of planetary gears 133, and the planetary gears 133 are disposed between adjacent first connecting portions 1312. The planetary wheel shaft 134 is inserted into the planetary gear 133, one end of the planetary gear 133 is connected to the first base portion through the planetary wheel shaft 134, one end of the planetary wheel shaft 134 is connected to the first connection hole 1313, and the other end of the planetary wheel shaft 134 is connected to a corresponding structure of the second planet carrier 132. The second connecting hole 1314 is used to connect the first connecting gear 110. A bearing is disposed between the second connecting hole 1314 and the first connecting gear 110, and a bearing is disposed between the planetary axle 134 and the first connecting hole 1313, and in this embodiment, the bearing may be a needle bearing, where the space occupied by the needle bearing with a small thickness is smaller. A spacer is provided between the end of the planetary axle 134 and the first base portion 1311, and a spacer is provided between the first connecting gear 110 and the base portion, which can make the connection tighter, preventing wear between the structures.

Specifically, the second carrier 132 is provided with a second connection portion 1322 and a second base portion 1321, and the second base portion 1321 is formed with a third connection hole 1323 and a fourth connection hole 1324. In the present embodiment, a plurality of second connecting portions 1322 are provided for respectively limiting a plurality of corresponding planetary gears 133. Specifically, the number of second connecting portions 1322 is greater than the number of planetary gears 133, and the number of second connecting portions 1322 corresponds to the number of first connecting portions 1312. The planetary gear 133 is disposed between adjacent second connecting portions 1322. The planetary wheel shaft 134 is disposed through the planetary gear 133, and one end of the planetary gear 133 is drivingly connected to the second base portion 1321 through the planetary wheel shaft 134. Specifically, one end of the planetary axle 134 is connected to the third connection hole 1323, and the other end of the planetary axle 134 is connected to the corresponding structure of the first carrier 131. The fourth connection hole 1324 is for connecting the first connection gear 110. A bearing is disposed between the fourth connecting hole 1324 and the first connecting gear 110, and a bearing is disposed between the planetary axle 134 and the third connecting hole 1323, and in this embodiment, the bearing may be a needle bearing, and the space occupied by the needle bearing with a small thickness is smaller. A spacer is provided between the end of the planetary axle 134 and the second base portion 1321, and a spacer is provided between the second connecting gear 120 and the base portion, which can make the connection tighter, preventing wear between the structures.

In the present embodiment, the first connecting hole 1313, the second connecting hole 1314, the third connecting hole 1323, and the fourth connecting hole 1324 are through holes penetrating the first base portion 1311 or the second base portion 1321. In other embodiments, the first and third connection holes 1313 and 1323 may be groove-type structures, and accordingly, both ends of the planetary axle 134 may be abutted to connect the groove-type structures.

In the present embodiment, the heights of the first carrier 131 and the second carrier 132 are different. Further, the first connection portion 1312 and the second connection portion 1322 are different in length. The first connecting portion 1312 and the second connecting portion 1322 are respectively disposed at edges of the first base portion 1311 and the second base portion 1321, and the first connecting portion 1312 and the second connecting portion 1322 and the first base portion 1311 and the second base portion 1321 jointly enclose the transmission cavity 103.

In the present embodiment, the first planet carrier 131 is provided with four first connection portions 1312, and the second planet carrier 132 is provided with four second connection portions 1322, and each first connection portion 1312 of the first planet carrier 131 is connected with a corresponding connection portion of the second planet carrier 132. The connected planet carrier is divided by the connecting portion into four openings, which communicate with the transmission chamber 103 or are part of the transmission chamber 103. The planetary gear 133 is provided with two openings which are respectively arranged in two opposite openings along a second direction, the remaining two openings and the transmission cavity 103 are used for the wheel shaft 13 to pass through, the second direction is perpendicular to the first direction, and the second direction is perpendicular to the direction of the first axis 10 a.

In other embodiments, the connection portion of the planet carrier and the planet gears 133 may be other numbers, at least two openings opposite along the central axis 10b and a transmission cavity 103 communicating the two openings may be formed, and the planet gears 133 may be other structures, so long as the movement can be transmitted from the first connection gear 110 to the second connection gear 120, and the wheel shaft is not hindered from passing through the transmission cavity 103.

Further, the first connecting gear 110 has an internal tooth portion 111 formed therein and an external tooth portion 112 formed therein. Similarly, the second connecting gear 120 is internally formed with an internal tooth portion 121 and externally formed with an external tooth portion 122. The inner teeth (111, 121) of the first and second connecting gears 110, 120 are connected to the input member 12 and the transmission assembly 30, respectively, and the outer teeth (112, 122) of the first and second connecting gears 110, 120 are connected to both ends of the planetary gear 133, respectively. Further, a nesting portion 113 is further formed on the outer portion of the first connecting gear 110, and the nesting portion 113 is connected to the second connecting hole 1314 and is connected to the second connecting hole 1314. Further, a nesting portion 123 is formed on the outer portion of the second connecting gear 120, and the nesting portion 123 is connected to the fourth connecting hole 1324 and is inserted into the fourth connecting hole 1324. After the first connecting gear 110 is connected to the first carrier 131, the external gear 111 of the first connecting gear 110 is located between the first base 1311 and the second base 1321, and after the second connecting gear 120 is connected to the second carrier 132, the external gear of the second connecting gear 120 is located between the first base and the second base.

The planetary gear 133 includes a body portion 1332 and a meshing portion 1331. The body portion 1332 is sleeved outside the planetary gear shaft 134, a connection hole is formed in the body portion 1332, and the planetary gear shaft 134 is penetrated through the connection hole, so that the planetary gear 133 is connected to the planet carrier. The engaging portions 1331 are gears formed at both ends of the body portion 1332, and the engaging portions 1331 at both ends are engaged with the first and second coupling gears 110 and 120, respectively, so that the movement of the input member 12 is transmitted to the transmission assembly 30 through the first and second coupling gears 110 and 120. Specifically, the engaging portion 1331 and the body portion 1332 are integrally formed, and the engaging portion 1331 may be concavely provided at both ends of the body portion 1332 or may be convexly provided at both ends of the body portion 1332.

The first planet carrier 131 is provided with a first fixed hole 1315, and the second planet carrier 132 is provided with a second fixed hole 1325. Specifically, the first fixing hole 1315 penetrates the first connection portion 1312 and the first base portion 1311, and the second fixing hole 1325 penetrates the second connection portion 1322 and the second base portion 1321. When the first planet and the second planet are connected, the first fixation hole 1315 and the second fixation hole 1325 are aligned, forming a fixation hole through the planet carrier. The coupling 100 further includes a plurality of fixed shafts 135, and the plurality of fixed shafts 135 pass through the first and second fixed holes 1315 and 1325, respectively, to fixedly connect the connector with the differential 14. In this embodiment, the fixing hole is provided at the edge of the planet carrier, so that the fixing shaft 135 passes through the first and second connection parts and does not pass through the transmission cavity 103, the fixing shaft 135 does not affect the movement of the planet gear 133, and the space of the coupling 100 is fully utilized. In other embodiments, the fixing hole and the fixing shaft 135 may not be provided in the first and second connection parts.

The intermediate axle assembly 10 further includes a second differential 14, and the front wheel axle 13 includes a first front wheel axle 131 and a second front wheel axle 132 disposed along a second axis. The middle part of the second differential 14 is in transmission connection with the first output piece 221, one end of the second differential 14 is in transmission connection with the first front wheel shaft 131, and the other end is in transmission connection with the second front wheel shaft 132. Specifically, the middle part of the second differential 14 is drivingly connected to the first output end through the driving member 11 and the driven member, which are engaged with each other. One end of the second differential 14 is in transmission connection with the first front wheel shaft 131, the other end of the second differential is in transmission connection with the second front wheel shaft 132 through the coupling 100, and the second front wheel shaft 132 penetrates through the coupling 100. The second differential 14 allows the wheels on both ends of the front wheel axle 13 to rotate at different speeds.

The mid-bridge assembly further includes a nut 16, an adjustment ring 18, a flange 17, and an oil seal 19. The end face of the adjusting ring 18 is attached to the outer ring of the bearing, the thread diameter of the adjusting ring 18 is connected with the first speed reducer shell, and the round hole of the adjusting ring 18 is connected with the shaft diameter of the oil seal 19. The diameter of the flange 17 is matched with the lip of the oil seal, and the spline hole of the flange 17 is connected with the spline shaft of the input piece 12. The threaded hole of the nut 16 is connected with the thread diameter of the input member 12, and a circular ring is arranged between the circular hole of the flange 17 and the shaft diameter of the input member 12.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A transaxle for a drive conversion comprising a center bridge assembly and a rear axle assembly, the center bridge assembly comprising:

A coupling disposed along a first axis, the coupling comprising:

a first end;

the second end is in transmission connection with the rear axle assembly;

a first clutch in driving connection with the input member, the first clutch being configured to be movable along a first axis between a first locked position and a first unlocked position; when the first clutch member is positioned at the first locking position, the first clutch member is used for connecting the input member with the first end in a transmission way, so that the input member is coaxially connected with the rear axle assembly through the coupler; the first clutch member is separable from the first end when the first clutch member is in the first unlocked position.

2. The drive axle of claim 1 wherein the axle assembly further comprises a wheel axle, the coupling further comprising a drive cavity between the first end and the second end, the wheel axle passing through the drive cavity along a second axis, the second axis intersecting the first axis.

3. The drive axle of claim 2, wherein the coupling comprises:

4. The drive axle of claim 3 wherein said first planetary gear set comprises:

a carrier connecting the first connecting gear and the second connecting gear;

5. The drive axle of claim 1 wherein the first clutch member includes a first splined portion in driving engagement with the input member and a second splined portion in driving engagement with the first connecting gear when the first clutch member is in the first locked position.

6. The drive axle of claim 1 wherein said intermediate axle assembly further comprises a first differential drivingly connected to said input member, said first differential comprising a first output member outputting a first motion and a second output member outputting a second motion; the first output piece is in transmission connection with the wheel shaft; the second output piece is in transmission connection with the first end, and the first clutch piece is in transmission connection with the second output piece and can move relative to the second output piece.

7. The drive axle of claim 6, wherein the first output member is disposed about the exterior of the second output member, and the second output member is disposed at least partially about the exterior of the input member.

8. The drive axle of claim 6, wherein the first differential further comprises:

9. The drive axle of claim 8 wherein the first clutch member is in the first locked position when the second clutch member is in the second locked position.

10. A vehicle provided with a driveable drive axle according to any one of claims 1 to 9.