CN110962505B - Transaxle and vehicle having the same - Google Patents

Abstract

The invention discloses a drive axle and a vehicle having the same. The drive axle includes: a motor assembly including a motor shaft; an axle housing assembly including an axle housing cavity; a deceleration device , the reduction gear is arranged in the axle housing cavity, the motor shaft is connected with the reduction gear, the interior of the reduction gear is provided with a planetary gear and a first connecting shaft, and the first connecting shaft passes through the The planetary wheel is connected with the planetary wheel through a roller bearing, and an oil inlet channel is arranged in the first connecting shaft to communicate the axle housing cavity with the interior of the reduction gear. The drive axle of the invention can lubricate the components in the reduction gear, improve the reliability of the drive axle, and prolong the service life of the drive axle.

Description

Drive axle and vehicle with same

technical field

The invention relates to the technical field of automobile manufacturing, in particular to a drive axle and a vehicle with it.

Background technique

In the drive axle of the related art, the lubricating effect between the components inside the reduction gear is poor, which affects the reliability and service life of the drive axle to a certain extent.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a driving axle, which can lubricate the components in the reduction gear, improve the reliability of the driving axle, and prolong the service life of the driving axle.

The present invention also proposes a vehicle, including the above drive axle.

The driving axle according to the embodiment of the present invention includes: a motor assembly, the motor assembly includes a motor shaft; an axle housing assembly, the axle housing assembly includes an axle housing cavity; a reduction gear, the reduction gear is arranged in In the cavity of the axle housing, the motor shaft is connected with the reduction gear, and the interior of the reduction gear is provided with a planetary gear and a first connecting shaft, and the first connecting shaft passes through the planetary gear and is connected with the The planetary wheels are connected by roller bearings, and an oil inlet channel is provided in the first connecting shaft to communicate the axle housing cavity with the interior of the reduction gear.

According to the drive axle of the embodiment of the present invention, an oil inlet passage is provided in the first connecting shaft in the reduction device to communicate the cavity of the axle housing with the interior of the reduction device. In this way, the various parts in the reduction gear can be lubricated, and dry grinding between the parts in the reduction gear can be avoided to a certain extent, thereby improving the reliability of the reduction gear, improving the reliability of the drive axle, and helping to extend the drive axle service life.

According to some embodiments of the present invention, the oil inlet of the oil inlet passage is located on the axial end surface of the first connecting shaft, and the outer peripheral wall of the first connecting shaft is provided with an outlet communicating with the oil inlet passage. oil hole.

Further, a gap is provided between the first connecting shaft and the inner wall of the planetary wheel, and the oil outlet hole communicates with the gap.

According to some embodiments of the present invention, the reduction device includes a planetary reducer, and the planetary reducer includes a sun gear, a planetary gear and a planet carrier, the sun gear is connected to the motor shaft, and the planetary gear is connected to the The sun gear engages.

In some embodiments of the present invention, the planetary reducer further includes an oil guide plate, the oil guide plate is arranged on the planet carrier, at least a part of the oil guide plate is arranged facing the oil inlet so that Lubricating oil is introduced into the oil inlet passage.

In some embodiments of the present invention, the planetary reducer further includes a planetary spacer, and the planetary spacer is sleeved on the first connecting shaft and located between the planetary carrier and the planetary gear, so A first oil guide groove is provided on the end surface of the planet gasket close to the planet wheel, and an oil guide hole is also provided on the planet gasket in its thickness direction.

Specifically, the inner peripheral wall of the planetary gasket is provided with an outwardly concave concave hole to define the oil guide hole.

According to some embodiments of the present invention, the drive axle further includes a differential, and the differential includes: a housing, the housing defines a placement space, and the housing is connected to the output end of the reduction gear ; the second connecting shaft, the second connecting shaft is arranged in the placement space, the second connecting shaft is fixed on the housing to rotate synchronously with the housing; bevel gear, the bevel gear sleeve It is arranged on the second connecting shaft and is rotatable relative to the second connecting shaft; a side gear, the side gear is arranged in the placement space and engages with the bevel gear.

In some embodiments of the present invention, a first gasket is provided between the bevel gear and the housing, and a first oil passage groove is provided on the surface of the first gasket facing the bevel gear.

In some embodiments of the present invention, a second gasket is provided between the side gear and the inner wall of the housing.

Further, a second oil passage groove is provided on the end surface of the second gasket facing the side gear.

In some embodiments of the present invention, a second oil guide groove is provided on the outer peripheral wall of the part of the second connecting shaft that cooperates with the bevel gear.

According to some embodiments of the present invention, the motor assembly further includes a motor housing and a motor assembly disposed in the motor housing, the motor housing defines a flow channel, and the axle housing assembly includes: The first axle housing assembly, the first axle housing assembly is arranged at one end of the motor housing, the first axle housing assembly is provided with a first overflow port, and the first overflow port is connected with the first overflow port The flow channel communicates, the first axle housing assembly includes a first axle housing cavity, and the first overflow port communicates with the first axle housing cavity; the second axle housing assembly, the second axle housing The assembly is arranged at the other end of the motor case, and the second axle case assembly is provided with a second overflow port, the second overflow port communicates with the flow channel, and the second axle case assembly The assembly includes a second axle housing cavity, and the second overflow port communicates with the second axle housing cavity.

According to some embodiments of the present invention, the drive axle further includes a spoiler provided on the motor shaft, and the spoiler is located in the axle housing assembly.

According to some embodiments of the present invention, the motor assembly further includes an oil seal assembly, and the oil seal assembly seals a gap between the motor shaft and the motor housing of the motor assembly.

According to some embodiments of the present invention, the speed reduction device is a multi-stage speed reducer.

A vehicle according to an embodiment of the present invention includes the driving axle according to the above-mentioned embodiments of the present invention.

Additional aspects and advantages of the present invention will be set forth in part, and partly will be apparent from the following description, by providing a transaxle according to the above-described embodiments of the present invention, in accordance with a vehicle according to an embodiment of the present invention, or by Practice of the present invention understands.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

1 is a schematic diagram of a drive axle according to an embodiment of the present invention;

2 is a cross-sectional view of a drive axle according to an embodiment of the present invention;

Fig. 3 is a partial sectional view A of a driving axle according to an embodiment of the present invention;

Fig. 4 is a partial cross-sectional view B of a drive axle according to an embodiment of the present invention;

Fig. 5 is a partial schematic diagram C of a driving axle according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of a planetary spacer according to an embodiment of the present invention;

7 is an exploded view of a differential according to an embodiment of the present invention;

FIG. 8 is a partial schematic diagram D of a differential according to an embodiment of the present invention;

Fig. 9 is a schematic diagram of a second connecting shaft according to an embodiment of the present invention;

10 is a schematic diagram of a first gasket according to an embodiment of the present invention;

Fig. 11 is a schematic diagram of a second gasket according to an embodiment of the present invention.

Reference signs:

drive axle 100;

Motor assembly 1; motor casing 11; flow channel a; motor shaft 121; oil seal assembly 13;

Axle housing assembly 10; Axle housing cavity 10a;

The first axle housing assembly 2; the first overflow port 21; the first axle housing cavity 22;

The second axle housing assembly 3; the second overflow port 31; the oil filling port 32; the oil discharge port 33; the second axle housing cavity 34;

Reduction device 4; planetary reducer 41; sun gear 411; planetary gear 412; planet carrier 413;

The first connecting shaft 414; the oil inlet passage b; the oil inlet c; the oil outlet d; the oil guide plate 415; the planetary gasket 416;

The first oil guide groove 416a; the oil guide hole 416b; the ring gear 417;

differential 5; housing 51; placement space 51a; positioning groove 51b; connecting hole 51c; second connecting shaft 52;

The second oil guide groove 52a; the positioning hole 52b; the bevel gear 53;

Side gear 54; first gasket 55; first oil passage 55a; second gasket 56; second oil passage 56a;

Half shaft 6; first brake assembly 7; second brake assembly 8; hub assembly 9; half shaft oil seal 40;

bearing 20; roller bearing 30.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

A drive axle 100 according to an embodiment of the present invention will be described below with reference to FIGS. 1-11 .

As shown in FIGS. 1-11 , a drive axle 100 according to an embodiment of the present invention includes: a motor assembly 1 , an axle housing assembly 10 and a reduction device 4 .

Specifically, the motor assembly 1 includes a motor shaft 121 . The axle housing assembly 10 includes an axle housing cavity 10a.

The deceleration device 4 is arranged in the axle housing cavity 10 a, and the motor shaft 121 is connected with the deceleration device 4 . It can be seen that the reduction gear 4 can be driven by the motor shaft 121 to rotate, that is to say, the motor assembly 1 can provide power for the reduction gear 4 to run.

A planetary gear 412 and a first connecting shaft 414 are arranged inside the reduction gear 4 , and the first connecting shaft 414 passes through the planetary gear 412 and is connected with the planetary gear 412 through the roller bearing 30 . It can be seen that the first connecting shaft 414 can rotate synchronously with the planetary gear 412 (it is illustrated here that the synchronous rotation of the planetary wheel 412 and the first connecting shaft 414 does not rotate around the central axis of the first connecting shaft 414, but The position of the overall structure of the first connecting shaft 414 is continuously changing and the planetary gear 412 can also rotate relative to the first connecting shaft 4 .

An oil inlet passage b is provided in the first connecting shaft 414 to communicate the axle housing cavity 10 a with the interior of the reduction gear 4 . It is known that lubricating oil is provided in the axle housing cavity 10a, and the arrangement of the oil inlet passage b enables the lubricating oil in the axle housing cavity 10a to enter the interior of the reduction gear 4 through the oil inlet passage b, thereby effectively lubricating the first Connect the shaft 414 and the planetary wheel 412, and when the peripheral wall of the roller bearing 30 is provided with a plurality of passage holes passing through it in its thickness direction, the lubricating oil can pass through the passage holes between the planetary wheel 412 and the first connection shaft 414 flow between them, thereby improving the lubricating effect of lubricating oil on the first connecting shaft 414 and the planetary gear 412 .

At the same time, it can be seen that along with the operation of the speed reduction device 4 and the flow of the lubricating oil itself, the lubricating oil can also lubricate other parts in the speed reduction device 4, so as to avoid dry grinding between the parts in the speed reduction device 4 to a certain extent, thereby The reliability of the speed reduction device 4 can be improved, the reliability of the driving axle 100 can be improved, and the service life of the driving axle 100 can be extended at the same time.

According to the drive axle 100 of the embodiment of the present invention, the oil inlet passage b is provided in the first connecting shaft 414 in the reduction device 4 to communicate the axle housing cavity 10 a with the interior of the reduction device 4 . Thereby, various parts in the speed reduction device 4 can be lubricated, and dry grinding phenomenon between the parts in the speed reduction device 4 can be avoided to a certain extent, and then the reliability of the speed reduction device 4 can be improved, and the reliability of the drive axle 100 can be improved. It is beneficial to prolong the service life of the drive axle 100 .

As shown in Figure 5, according to some embodiments of the present invention, the oil inlet c of the oil inlet passage b is located on the axial end surface of the first connecting shaft 414, and the outer peripheral wall of the first connecting shaft 414 is provided with the oil inlet passage b. Connected oil outlet d. It can be seen from this that lubricating oil can enter the oil inlet channel b in the first connecting shaft 414 through the oil inlet c, and flow to the oil outlet hole d with the rotation of the first connecting shaft 414, and then to a certain extent realize Lubrication of the outer peripheral wall of the first connecting shaft 414 .

Further, a gap is provided between the first connecting shaft 414 and the inner wall of the planetary gear 412, and the oil outlet hole d communicates with the gap. Therefore, it can be seen that the lubricating oil flowing from the oil inlet channel b to the outside of the oil outlet hole d can flow into the gap between the first connecting shaft 414 and the inner wall of the planetary wheel 412, and it can be understood that the gap can be connected with the reduction gear. 4 communicates with each other, so that lubricating oil can flow into the interior of the reduction gear 4 along the gap to lubricate the various components in the reduction gear 4, thereby improving the lubrication effect in the reduction gear 4 and improving the reliability of the reduction gear 4, thus It is beneficial to improve the reliability of the drive axle 100 and prolong the service life of the drive axle 100 .

Specifically, the direction in which the lubricating oil flows in the reduction gear 4 can be: the lubricating oil flows into the oil inlet passage b of the first connecting shaft 414 through the oil inlet c, then flows to the oil outlet hole d, and then flows along the oil outlet hole d flows to the inner ring of the roller bearing 30, and then flows into the gap between the first connecting shaft 414 and the inner wall of the planetary wheel 412 (because the roller bearing 30 is located in the gap, it can be considered that the lubricating oil can flow or flow Through the roller bearing 30), it can finally flow into the internal components of the reduction gear 4 along the gap, such as the sun gear 411.

The flow direction of the lubricating oil in the reduction gear 4 can also be: the lubricating oil flows into the oil inlet passage b of the first connecting shaft 414 through the oil inlet c, then flows to the oil outlet d, and then flows along the oil outlet d to the inner ring of the roller bearing 30, and then flows into the gap between the first connecting shaft 414 and the inner wall of the planetary wheel 412 (because the roller bearing 30 is located in the gap, it can be considered that the lubricating oil can flow through or flow through the roller sub-bearing 30), then flow to the outer ring of the roller bearing 30, and finally flow to the inner wall of the planetary wheel 412 along the gap.

According to some embodiments of the present invention, the reduction device 4 includes a planetary reducer 41, and the planetary reducer 41 includes a sun gear 411, a planetary gear 412 and a planet carrier 413, the sun gear 411 is connected to the motor shaft 121, and the planetary gear 412 is connected to the sun gear 411 engage. It can be seen that when the planetary reducer 41 is working, the motor shaft 121 can drive the sun gear 411 to rotate, and the planetary gear 412 meshes with the sun gear 411 to be driven to rotate by the sun gear 411 . Optionally, the motor shaft 121 may be connected to the sun gear 411 through a spline connection or a flat key connection. The sun gear 411 can be supported and installed on the planet carrier 413 through the bearing 20 (such as a deep groove ball bearing). Optionally, the planet carrier 413 can be supported and installed on the motor assembly 1 through the bearing 20 (such as a deep groove ball bearing). Optionally, the interior of the reduction gear 4 can be defined by the ring gear 417 and the planet carrier 413 , wherein the ring gear 417 can mesh with the planet gear 413 . Therefore, sufficient lubrication can be obtained between the sun gear 411 and the planet gear 413 , between the planet gear 413 and the first connecting shaft 414 , and between the planet gear 413 and the ring gear 417 , thereby improving the reliability of the drive axle 100 .

As shown in Figures 4-5, in some embodiments of the present invention, the planetary reducer 41 further includes an oil guide plate 415, the oil guide plate 415 is arranged on the planet carrier 413, and at least a part of the oil guide plate 415 is facing The oil port c is set so as to introduce lubricating oil into the oil passage b. That is to say, the oil guide plate 415 has a certain flow guiding effect. It is known that when the drive axle 100 is working, the lubricating oil in the axle housing cavity 10a can be stirred up by the rotating parts to perform centrifugal motion, and when the lubricating oil hits the oil deflecting plate 415, it will flow along the oil deflecting plate 415 , and finally flows into the oil inlet passage b under the diversion action of the oil deflector 415, thereby ensuring the amount of lubricating oil in the oil inlet passage b of the first connecting shaft 414 to a certain extent, thereby ensuring that each oil in the reduction gear 4 The lubricating effect between components further improves the reliability of the drive axle 100 and prolongs the service life of the drive axle 100 .

As shown in Figures 4 and 6, in some embodiments of the present invention, the planetary reducer 41 further includes a planetary washer 416, which is sleeved on the first connecting shaft 414 and located between the planetary carrier 413 and the planetary wheel. Between 412, a first oil guiding groove 416a is provided on the end surface of the planetary gasket 416 close to the planetary wheel 412, and an oil guiding hole 416b is formed on the planetary gasket 416 through it in the thickness direction. Therefore, when the planetary gear 412 rotates relative to the planetary washer 416 , the planetary gear 412 and the planetary washer 416 can be lubricated effectively, reducing the wear of the end surface of the planetary gear 412 , thereby improving the reliability of the planetary reducer 41 .

Specifically, as shown in FIG. 6 , the inner peripheral wall of the planetary gasket 416 is provided with an outwardly concave concave hole to define an oil guide hole 416 b. That is to say, the oil guide hole 416b is disposed close to the first connecting shaft 414, so that the first connecting shaft 414 can be further lubricated, and at the same time, part of the lubricating oil can flow along the oil guide hole 416b to between the planetary gasket 416 and the housing 51 space, and to a certain extent play the role of lubricating the housing 51 and the planetary gasket 416, thereby improving the reliability of the drive axle 100 and prolonging the service life of the drive axle 100.

As shown in Figures 7-11, according to some embodiments of the present invention, the transaxle 100 further includes a differential 5, and the differential 5 includes: a housing 51, a second connecting shaft 52, a bevel gear 53 and a side gear 54.

Specifically, a placement space 51 a is defined inside the housing 51 , and the housing 51 is connected to the output end of the reduction gear 4 . Thus, the housing 51 can be driven to rotate with the output end of the reduction gear 4 . Wherein the casing 51 may be formed as an open type.

The second connecting shaft 52 is disposed in the placement space 51 a, and the second connecting shaft 52 is fixed on the housing 51 to rotate synchronously with the housing 51 . That is to say, when the drive axle 100 is working, the differential 5 is running. Since the second connecting shaft 52 is fixed on the housing 51, the reliability of the synchronous rotation of the second connecting shaft 52 and the housing 51 is guaranteed. Ensuring the reliability of the differential 5 to a certain extent can ensure the reliability of the drive axle 100 . It should be noted that the specific type of the second connecting shaft 52 can be selected according to the actual situation, the second connecting shaft 52 can be formed as a straight shaft (as shown in Figures 7 and 9), and the second connecting shaft 52 can also be formed for the cross axis etc.

The bevel gear 53 is sleeved on the second connecting shaft 52 and is rotatable relative to the second connecting shaft 52 . It can be seen that, when the second connecting shaft 52 rotates, the bevel gear 53 can rotate synchronously with the second connecting shaft 52 , and the bevel gear 53 can also rotate relative to the second connecting shaft 52 . That is to say, when the differential 5 is in operation, the bevel gear 53 can rotate synchronously with the housing 51 and the second connecting shaft 52 (that is, revolve), and the bevel gear 53 can also rotate relative to the second connecting shaft 52 (that is, rotate on its own). ).

The side gear 54 is disposed in the placement space 51 a and engages with the bevel gear 53 . In this way, the reliable operation of the differential gear 5 can be ensured, thereby ensuring the reliability of the drive axle 100 .

Specifically, when the transaxle 100 is used in a vehicle, in the differential 5, with the rotation of the housing 51, the second connecting shaft 52 rotates synchronously, and then drives the bevel gear 53 to revolve. The shaft gears 54 mesh and cooperate, thereby driving the side shaft gears 54 on both sides to rotate, and then driving the driving wheels on both sides of the vehicle to rotate.

When the vehicle is running on a straight road, since the driving wheels on both sides of the vehicle receive equal resistance, the meshing points of the bevel gear 53 and the side gears 54 on the left and right sides receive the same force, so the bevel gear 53 only Revolution.

When the vehicle is running or turning on an uneven road, due to the different resistances received by the drive wheels on both sides of the vehicle, through the feedback of the resistance, the meshing points of the bevel gear 53 and the side gears 54 on the left and right sides are subjected to The force is different, so that the bevel gear 53 not only revolves, but also rotates under the action of the force difference, and then makes the speed of the side gear 54 on both sides of the bevel gear 53 different, so that the speed of the driving wheels on both sides of the vehicle is different. As a result, the vehicle can run reliably on uneven roads, or the vehicle can turn smoothly, thereby improving the reliability of the vehicle operation.

As shown in FIGS. 8 and 10 , in some embodiments of the present invention, a first gasket 55 is provided between the bevel gear 53 and the housing 51 , and the surface of the first gasket 55 facing the bevel gear 53 is provided with The first oil passage groove 55a. It can be seen that the setting of the first gasket 55 can effectively avoid the direct contact between the bevel gear 53 and the housing 51, and then can avoid to a certain extent when the bevel gear 53 rotates relative to the second connecting shaft 52 (because the second connecting shaft 52 Rotate synchronously with the housing 51, and when the bevel gear 53 rotates on its own, that is, when the bevel gear 53 rotates relative to the second connecting shaft 52, the bevel gear 53 rotates relative to the housing 51) Contact friction occurs between the bevel gear 53 and the housing 51 and wears The bevel gear 53 and the housing 51 can further improve the structural reliability of the differential 5 and prolong the service life of the driving axle 100 to a certain extent.

At the same time, when the bevel gear 53 rotates relative to the first gasket 55, due to the setting of the first oil passage groove 55a, a certain amount of lubricating oil can be stored in the first oil passage groove 55a, thereby lubricating the first gasket to a certain extent. 55 and the bevel gear 53, reducing the dry grinding phenomenon between the first gasket 55 and the bevel gear 53. At the same time, the bevel gear 53 and the second connecting shaft 52 can be lubricated to a certain extent, thereby reducing wear, ablation or burnout between the bevel gear 53 and the second connecting shaft 52, and improving the reliability of the differential gear 5. Further improving the reliability of the driving axle 100 is beneficial to prolonging the service life of the driving axle 100 .

As shown in FIG. 10 , according to some embodiments of the present invention, the first oil passage groove 55 a penetrates through the first gasket 55 in the thickness direction of the first gasket 55 . That is to say, the lubricating oil in the first oil passage groove 55a can flow towards the bevel gear 53, and can also flow towards the housing 51, thereby not only lubricating the first gasket 55 and the bevel gear 53, but also lubricating the housing 51 and the housing 51. The first washer 55 can avoid to a certain extent the phenomenon of dry grinding between the first washer 55 and the housing 51 when it rotates relative to the housing 51 under force, thereby further improving the reliability of the differential 5, Furthermore, the reliability of the driving axle 100 is improved, and the service life of the driving axle 100 is prolonged.

According to some embodiments of the present invention, there are a plurality of first oil passage grooves 55 a, and the plurality of first oil passage grooves 55 a are distributed along the circumferential direction of the first gasket 55 . For example, as shown in FIG. 10 , there are four first oil passage grooves 55 a and each first oil passage groove 55 a penetrates through the first gasket 55 along the thickness direction of the first gasket 55 . Thus, the lubrication effect on the first gasket 55 and the bevel gear 53 can be further improved, the reliability of the differential 5 can be improved, and the service life of the drive axle 100 can be extended.

Further, a first oil guide groove (not shown) is provided on the surface of the first gasket 55 facing the bevel gear 53 , and the first oil guide groove extends along the radial direction of the first gasket 55 . Therefore, the lubricating effect on the first gasket 55 and the bevel gear 53 can be further improved, thereby improving the reliability of the differential 5 and prolonging the service life of the drive axle 100 . Of course, it can be understood that a first oil guide groove may also be provided on the surface of the first gasket 55 facing the housing 51 , so as to improve the lubricating effect between the first gasket 55 and the housing 51 .

As shown in FIGS. 7 and 8 , in some embodiments of the present invention, a second gasket 56 is provided between the side gear 54 and the inner wall of the housing 51 . Therefore, the abrasion caused by the direct contact between the side gear 54 and the housing 51 can be effectively avoided, the reliability of the differential 5 can be further improved, and the service life of the drive axle 100 can be prolonged.

Further, as shown in FIG. 7 and FIG. 11 , a second oil passage groove 56 a is provided on the end surface of the second gasket 56 facing the side gear 54 . Therefore, when the side gear 54 rotates relative to the second gasket 56, due to the setting of the second oil passage groove 56a, a certain amount of lubricating oil can be stored in the second oil passage groove 56a, thereby lubricating the second gasket to a certain extent. 56 and the side gear 54, reducing the dry grinding phenomenon between the second gasket 56 and the side gear 54, thereby improving the reliability of the differential 5 and helping to prolong the service life of the drive axle 100.

Specifically, as shown in FIGS. 7 and 11 , the second oil passage groove 56 a penetrates through the second gasket 56 in the thickness direction of the second gasket 56 . That is to say, the lubricating oil in the second oil passage groove 56a can flow towards the side gear 54, and can also flow towards the housing 51, thereby not only lubricating the second gasket 56 and the side gear 54, but also lubricating the housing. 51 and the second gasket 56 can avoid to a certain extent the phenomenon of dry grinding between the second gasket 56 and the casing 51 when the second gasket 56 rotates relative to the casing 51 under force, thereby further improving the reliability of the structure of the differential 5 performance, which is beneficial to prolong the service life of the drive axle 100.

Specifically, there are a plurality of second oil passage grooves 56 a, and the plurality of second oil passage grooves 56 a are distributed along the circumferential direction of the second gasket 56 . For example, as shown in FIG. 7 and FIG. 11 , there are three second oil passage grooves 56 a and each second oil passage groove 56 a penetrates through the second gasket 56 along the thickness direction of the second gasket 56 . In this way, the lubrication effect on the second gasket 56 and the side gear 54 can be further improved, the reliability of the differential 5 can be improved, and the service life of the drive axle 100 can be extended.

Further, a second oil guide groove (not shown) is provided on the surface of the second gasket 56 facing the side gear 54 , and the second oil guide groove extends along the radial direction of the second gasket 56 . Therefore, the lubrication effect on the second gasket 56 and the side gear 54 can be further improved, thereby improving the reliability of the differential 5 and prolonging the service life of the drive axle 100 . Of course, it can be understood that a second oil guiding groove may also be provided on the surface of the second gasket 56 facing the housing 51 , so as to improve the lubricating effect between the second gasket 56 and the housing 51 .

Specifically, as shown in FIG. 7 , the housing 51 is provided with two positioning grooves 51 b oppositely arranged, and the two ends of the second connecting shaft 52 respectively protrude into the corresponding positioning grooves 51 b to be fixed to the housing 51 superior. Thereby, it is convenient to locate the second connecting shaft 52, and it is beneficial for the second connecting shaft 52 to be reliably fixed on the housing 51 to rotate synchronously with the housing 51, thereby improving the reliability of the structure of the differential 5 and facilitating the extension of the drive The service life of the bridge 100.

Further, as shown in Figures 7-9, the part of the second connecting shaft 52 extending into the positioning groove 51b is provided with a positioning hole 52b passing through it along the radial direction of the second connecting shaft 52, and the housing 51 is provided with The connecting hole 51c matched with the positioning hole 52b, the differential 5 also includes a connecting piece (not shown), one end of the connecting piece passes through the connecting hole 51c and the positioning hole 52b to fix the second connecting shaft 52 to the housing 51 superior. Therefore, it can be seen that the fixing method of the second connecting shaft 52 on the casing 51 is simple and reliable. It is convenient to install and disassemble the second connecting shaft 52 . At the same time, the reliability of fixing the second connecting shaft 52 on the casing 51 can be ensured.

As shown in FIG. 7 and FIG. 9 , in some embodiments of the present invention, a second oil guide groove 52 a is provided on the outer peripheral wall of the part of the second connecting shaft 52 that cooperates with the bevel gear 53 . It can be seen from this that when the bevel gear 53 rotates relative to the second connecting shaft 52, the lubricating oil in the second oil guide groove 52a can effectively lubricate the bevel gear 53 and the second connecting shaft 52, thereby reducing the amount of friction between the bevel gear 53 and the second connecting shaft 52. Abrasion, ablation or burnout between 52 improves the reliability of the differential 5 and is beneficial to prolonging the service life of the drive axle 100.

It can be understood that, when the first gasket 55 is provided between the bevel gear 53 and the housing 51, a first oil passage groove 55a is provided on the surface of the first gasket 55 facing the bevel gear 53, and the second connecting shaft 52 When the second oil guide groove 52a is provided on the outer peripheral wall of the part that cooperates with the bevel gear 53, the second oil guide groove 52a and the first oil guide groove 55a on the first gasket 55 can cooperate with each other, that is, the second oil guide groove 52a Both the lubricating oil and the lubricating oil in the first oil passage groove 55a can flow to the part where the second connecting shaft 52 and the bevel gear 53 cooperate, and then the amount of lubricating oil between the second connecting shaft 52 and the bevel gear 53 can be increased, and more Effectively lubricate the second connecting shaft 52 and the bevel gear 53 to reduce wear, ablation or burning between the second connecting shaft 52 and the bevel gear 53 .

Further, as shown in FIGS. 7 and 9 , the second oil guiding groove 52 a extends along the axial direction of the second connecting shaft 52 . It can be seen from this that the structure of the second oil guide groove 52a is simple and easy to manufacture. At the same time, the lubricating effect on the bevel gear 53 and the second connecting shaft 52 can be ensured. It should be noted that the extending direction of the second oil guide groove 52a is not limited to this, and may also extend in other directions, and may also be formed in different shapes. It only needs to ensure that the setting of the second oil guiding groove 52 a can effectively lubricate the bevel gear 53 and the second connecting shaft 52 .

Specifically, there are multiple second oil guide grooves 52 a , and the multiple second oil guide grooves 52 a are distributed at intervals along the circumferential direction of the second connecting shaft 52 . For example, there are two second oil guide grooves 52 a, and the two second oil guide grooves 52 a are symmetrical to the central axis of the second connecting shaft 52 . Thereby, the lubricating effect of lubricating oil on the bevel gear 53 and the second connecting shaft 52 can be further improved, the friction phenomenon when the bevel gear 53 rotates relative to the second connecting shaft 52 can be effectively reduced, the reliability of the differential 5 can be improved, and the drive axle can be extended. 100 service life.

Optionally, the second connecting shaft 52 is provided with an oil guiding channel (not shown in the figure), the oil guiding channel extends along the axial direction of the second connecting shaft 52, and at least one axial end surface of the second connecting shaft 52 An opening (not shown) communicating with the oil guiding channel is provided, and the second oil guiding groove 52a communicates with the oil guiding channel. It can be seen that part of the lubricating oil can flow into the oil guide channel through the opening, and enter the second oil guide groove 52a through the oil guide channel to realize the lubrication of the bevel gear 53 and the second connecting shaft 52 . At the same time, the arrangement of the oil guide channel can also effectively improve the effect of storing lubricating oil on the second connecting shaft 52 , which is beneficial to sufficient lubrication between the bevel gear 53 and the second connecting shaft 52 .

Optionally, a circular oil guide groove (not shown) is also provided on the outer peripheral wall of the second connecting shaft 52, and the circular oil guide groove is arranged on the part where the second connecting shaft 52 cooperates with the bevel gear 53 ends. It can be seen that when the differential 5 is in operation, the lubricating oil in the circular oil guide groove can gradually flow along the axial direction of the second connecting shaft 52 to the part where the second connecting shaft 52 cooperates with the bevel gear 53 to lubricate the second connecting shaft 52. The second connecting shaft 52 and the bevel gear 53 can further reduce the friction phenomenon when the bevel gear 53 rotates relative to the second connecting shaft 52, improve the reliability of the differential 5 and prolong the service life of the differential 5. At the same time, it can be understood that the circular oil guide groove can cooperate with the first oil guide groove 55a (or the second oil guide groove 52a) on the first gasket 55, that is, the lubricating oil in the circular oil guide groove and the first oil guide groove 52a can cooperate with each other. The lubricating oil in the first oil-through groove 55a (or the second oil-guiding groove 52a) can flow to the part where the second connecting shaft 52 and the bevel gear 53 cooperate, and then the lubricating oil between the second connecting shaft 52 and the bevel gear 53 can be increased. Lubricate the second connecting shaft 52 and the bevel gear 53 more effectively, and reduce the wear, ablation or burning phenomenon between the second connecting shaft 52 and the bevel gear 53.

As shown in FIGS. 1-3 , according to some embodiments of the present invention, the motor assembly 1 further includes a motor housing 11 and a motor assembly 12 disposed in the motor housing 11, and the motor housing 11 defines a flow channel a . It should be noted that the flow passage a is only defined by the motor casing 11, and the flow passage a is not connected to the space where the motor assembly 12 is arranged in the motor casing 11, so that the lubricating oil can be effectively prevented from entering the motor. The housing 11 affects the normal operation of the motor assembly 1 , thereby ensuring the reliability of the drive axle 100 .

The axle housing assembly 10 includes: a first axle housing assembly 2 and a second axle housing assembly 3 .

Specifically, the first axle housing assembly 2 is disposed at one end of the motor housing 11 , and the first axle housing assembly 2 is provided with a first overflow port 21 , and the first overflow port 21 communicates with the flow channel a. The first axle housing assembly 2 includes a first axle housing cavity 22 , and the first overflow port 21 communicates with the first axle housing cavity 22 . It can be seen that the first axle housing cavity 22 of the first axle housing assembly 2 can communicate with the flow passage a on the motor housing 11 through the first overflow port 21 . When the liquid level of the lubricating oil in the first axle housing cavity 22 exceeds the first overflow port 21, the excess lubricating oil can flow into the flow channel a through the first overflow port 21, when the first axle housing cavity When the lubricating oil in the body 22 is less or lower than the first overflow port 21 , the lubricating oil in the flow channel a can also flow into the first axle housing cavity 22 through the first overflow port 21 . Therefore, the amount of lubricating oil in the first axle housing cavity 22 can be guaranteed to a certain extent, thereby ensuring the lubricating effect between various components and improving the reliability of the driving axle 100 .

The second axle housing assembly 3 is arranged on the other end of the motor housing 11, and the second axle housing assembly 3 is provided with a second overflow port 31, which communicates with the flow passage a, and the second axle housing assembly The assembly 3 includes a second axle housing cavity 34 , and the second overflow port 31 communicates with the second axle housing cavity 34 . It can be seen that the second axle housing cavity 34 of the second axle housing assembly 3 can communicate with the flow channel a on the motor housing 11 through the second overflow port 31 . When the liquid level of the lubricating oil in the second axle housing cavity 34 exceeds the second overflow port 31, the excess lubricating oil can flow into the flow channel a through the second overflow port 31, when the second axle housing cavity When the lubricating oil in the body 34 is less or lower than the second overflow port 31 , the lubricating oil in the flow channel a can also flow into the second axle housing cavity 34 through the second overflow port 31 . Therefore, the amount of lubricating oil in the second axle housing cavity 34 can be guaranteed to a certain extent, thereby ensuring the lubricating effect between the components and improving the reliability of the drive axle 100 .

At the same time, it can be seen that the first axle housing cavity 22 , the flow channel a and the second axle housing cavity 34 are sequentially connected, so that when the liquid level of the lubricating oil in the first axle housing cavity 22 exceeds the first overflow port 21 , And when the lubricating oil in the second axle housing cavity 34 is less or lower than the second overflow port 31, the lubricating oil in the first axle housing cavity 22 can flow into the flow channel a through the first overflow port 21 , and then the lubricating oil flows along the flow channel a to the second overflow port 31 , and flows into the second axle housing cavity 34 through the second overflow port 31 . Similarly, when the liquid level of the lubricating oil in the second axle housing cavity 34 exceeds the second overflow port 31, and the lubricating oil in the first axle housing cavity 22 is less or lower than the first overflow port 21 , the lubricating oil can flow through the second overflow port 31 , the flow channel a and the first overflow port 21 in sequence, and finally flow into the first axle housing cavity 22 . That is to say, the first axle housing cavity 22, the flow passage a and the second axle housing cavity 34 cooperate with each other through the first overflow port 21 and the second overflow port 31 to form an oil guide channel for lubricating oil, thereby When the vehicle (not shown) using the driving axle 100 of the embodiment of the present invention bumps during operation, it can prevent the first axle housing cavity 22 or the second axle of the first axle housing assembly 2 from There is too little lubricating oil in the second axle housing cavity 34 of the housing assembly 3 , which causes wear and ablation of the internal components.

It should be noted that, in the drive axle 100, when the components in the first axle housing assembly 2 and the second axle housing assembly 3 rotate at a relatively high speed and there is a dry grinding phenomenon between them, that is, the components When there is a lack of lubricating oil between the parts, the wear between the parts is serious and high temperatures are likely to be generated on the contact surfaces with each other, and then ablation or burnout of the parts is prone to occur.

In summary, in the drive axle 100 of the embodiment of the present invention, the height of the lubricating oil in the first axle housing assembly 2 and the second axle housing assembly 3 at both ends of the motor assembly 1 can be balanced to a certain extent, and then Ensure the amount of lubricating oil in the first axle housing assembly 2 and the second axle housing assembly 3, improve the lubrication effect between the components in the first axle housing assembly 2 and the second axle housing assembly 3, effectively The phenomenon of dry grinding and burning between various components can be greatly reduced, thereby improving the reliability of the drive axle 100 and helping to prolong the service life of the drive axle 100 .

Specifically, the axle housing assembly 10 is provided with an oil filling port 32 and an oil discharge port 33 . When the axle housing assembly 10 includes the above-mentioned first axle housing assembly 2 and the second axle housing assembly 3, the oil injection port 32 and the oil discharge port 33 can be selected to be located in the first axle housing assembly according to the actual structure of the drive axle 100. 2 and/or the second axle housing assembly 3. For example, as shown in FIG. 1 , the speed reduction device 4 is arranged on the second axle housing assembly 3 , and the oil filling port 32 and the oil discharge port 33 are also arranged on the second axle housing assembly 3 . Therefore, the amount of lubricating oil in the driving axle 100 can be kept constant, which is beneficial to ensure the lubrication effect of each component in the driving axle 100 and improve the reliability of the driving axle 100 .

Specifically, as shown in Fig. 2 and Fig. 3, the drive axle 100 also includes a first brake assembly 7 and a second brake assembly 8, the first brake assembly 7 is arranged in the first axle housing assembly 2, and the second The brake assembly 8 is arranged in the second axle housing assembly 3 . Therefore, it can be ensured that the driving axle 100 has a braking function on the driving wheels of the vehicle, and then the stopping or rotation of the driving wheels can be controlled.

Specifically, the first brake assembly 7 is connected to the brake mounting flange of the first axle housing assembly 2 by bolts, and the second brake assembly 8 is connected to the brake mounting flange of the second axle housing assembly 3 by bolts , thereby ensuring the stability of the position of the first brake assembly 7 in the first axle housing assembly 2 and ensuring the stability of the position of the second brake assembly 8 in the second axle housing assembly 3 .

Further, as shown in FIGS. 2 and 3 , the drive axle 100 also includes two wheel hub assemblies 9 , and the two wheel hub assemblies 9 are installed on the first axle housing assembly 2 and the second axle housing assembly through bearings 20 respectively. 3 is far away from the end of the motor assembly 1. Furthermore, it is beneficial to ensure the reliability of the drive axle 100 in operation.

Specifically, as shown in Figures 2 and 3, the drive axle 100 also includes a half shaft 6, and the two ends of the half shaft 6 are respectively connected with the side gear 54 and the hub assembly 9, so that the side gear 54 can drive the half shaft when it rotates. The shaft 6 rotates synchronously, and the half shaft 6 drives the hub assembly 9 to rotate, thereby driving the driving wheels on both sides of the vehicle to rotate.

Specifically, the hub assembly 9 is lubricated with grease, and a half-shaft oil seal 40 is installed on the end surface of the hub assembly 9 away from the motor assembly 1 . Therefore, the leakage of lubricating oil in the first axle housing assembly 2 and the second axle housing assembly 3 can be effectively prevented, and the reliability of the driving axle 100 can be improved.

According to some embodiments of the present invention, the drive axle 100 further includes a spoiler (not shown in the figure) arranged on the motor shaft 121 , and the spoiler is located in the axle housing assembly 10 . That is, the spoiler is located in the axle housing cavity 10a. At the same time, it can be seen that the spoiler can rotate in the axle housing cavity 10a with the rotation of the motor shaft 121, so that it can play a role in disturbing the lubricating oil to a certain extent, which is conducive to the realization of lubricating oil in the axle housing cavity 10a. Centrifugal movement makes more lubricating oil in contact with the components in the axle housing cavity 10a, thereby improving the lubricating effect of the lubricating oil on the components in the axle housing cavity 10a, improving the reliability of the drive axle 100, and helping to extend the drive axle. 100 service life.

As shown in FIG. 3 , according to some embodiments of the present invention, the motor assembly 1 further includes an oil seal assembly 13 , and the oil seal assembly 13 seals the gap between the motor shaft 121 and the motor housing 11 . Thereby, it is possible to effectively prevent lubricating oil from entering the interior of the motor assembly 1 through the gap between the motor shaft 121 and the motor housing 11 and affect the reliability of the operation of the motor assembly 1, thereby improving the reliability of the drive axle 100 and prolonging the driving time. The useful life of the bridge 100.

As shown in Fig. 2 and Fig. 4, according to some embodiments of the present invention, the deceleration device 4 is a multi-stage decelerator. Therefore, the transmission ratio of the reduction gear 4 can be increased, thereby ensuring the reliability of the reduction gear 4 , thereby ensuring the reliability of the drive axle 100 .

Specifically, the axle housing assembly 10 is fixed on the motor assembly 1 by bolts. Therefore, the reliability of the axle housing assembly 10 being arranged at both ends of the motor assembly 1 can be ensured, and at the same time, the way of fixing the axle housing assembly 10 on the motor assembly 1 is simple and reliable.

A vehicle according to an embodiment of the present invention includes the transaxle 100 according to the above-described embodiment of the present invention.

According to the vehicle of the embodiment of the present invention, by setting the driving axle 100 according to the above-mentioned embodiment of the present invention, the first axle housing assembly 2 and the second axle housing assembly 3 at both ends of the motor assembly 1 can be balanced to a certain extent The height of the lubricating oil inside, and then ensure the amount of lubricating oil in the first axle housing assembly 2 and the second axle housing assembly 3, and improve each of the first axle housing assembly 2 and the second axle housing assembly 3 The lubricating effect between the parts can effectively reduce the phenomenon of dry grinding and burning between the parts, thereby improving the reliability of the vehicle and prolonging the service life of the vehicle.

Other configurations and operations of the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (17)

1. A drive axle, comprising:

a motor assembly including a motor shaft;

an axle housing assembly including an axle housing cavity;

decelerator, decelerator establishes in the axle housing cavity, the motor shaft with decelerator links to each other, decelerator's inside is equipped with planet wheel and first connecting shaft, first connecting shaft passes the planet wheel and with the planet wheel passes through roller bearing and connects, be equipped with the oil feed passageway in the first connecting shaft in order to incite somebody to action the axle housing cavity with decelerator's inside intercommunication.

2. The drive axle of claim 1, wherein the oil inlet of the oil inlet passage is located on an axial end face of the first connecting shaft, and the outer peripheral wall of the first connecting shaft is provided with an oil outlet communicated with the oil inlet passage.

3. The transaxle of claim 2 wherein a gap is provided between the first connecting shaft and an inner wall of the planet gear, and the oil outlet is in communication with the gap.

4. The transaxle of claim 1 wherein the reduction device comprises a planetary gear set including a sun gear coupled to the motor shaft, planet gears, and a planet carrier, the planet gears being in mesh with the sun gear.

5. The drive axle of claim 4, wherein the planetary reducer further comprises an oil guide plate, the oil guide plate is disposed on the planet carrier, and at least a portion of the oil guide plate faces an oil inlet of the oil inlet passage so as to guide lubricating oil into the oil inlet passage.

6. The drive axle according to claim 4, wherein the planetary reducer further includes a planetary spacer, the planetary spacer is sleeved on the first connecting shaft and located between the planetary carrier and the planetary gear, a first oil guiding groove is provided on an end surface of the planetary spacer close to the planetary gear, and an oil guiding hole penetrating through the planetary spacer in a thickness direction is further provided on the planetary spacer.

7. The drive axle according to claim 6, wherein concave holes are provided on the inner peripheral wall of the planetary washer to be recessed outward to define the oil guide holes.

8. The drive axle of claim 1, further comprising a differential, the differential comprising:

the shell is internally provided with a placing space, and the shell is connected with the output end of the speed reducing device;

the second connecting shaft is arranged in the placing space and fixed on the shell so as to synchronously rotate along with the shell;

the bevel gear is sleeved on the second connecting shaft and can rotate relative to the second connecting shaft;

and the side gear is arranged in the placing space and is in meshing fit with the bevel gear.

9. The drive axle according to claim 8, wherein a first gasket is arranged between the bevel gear and the housing, and a first oil through groove is arranged on a surface of the first gasket facing the bevel gear.

10. The drive axle of claim 8 wherein a second spacer is provided between the side gear and the inner wall of the housing.

11. The transaxle of claim 10 wherein the second spacer has a second oil passage on an end surface thereof facing the side gear.

12. The drive axle according to claim 8, wherein a second oil guide groove is provided on an outer circumferential wall of a portion of the second connecting shaft engaged with the bevel gear.

13. The drive axle of claim 1 wherein the motor assembly further comprises a motor housing and a motor assembly disposed within the motor housing, the motor housing defining a flow passage therein, the axle housing assembly comprising:

the first axle housing assembly is arranged at one end of the motor housing, a first overflow port is arranged on the first axle housing assembly and communicated with the flow channel, the first axle housing assembly comprises a first axle housing cavity, and the first overflow port is communicated with the first axle housing cavity;

second axle housing assembly, second axle housing assembly establishes the other end of motor casing, be equipped with the second overflow mouth on the second axle housing assembly, the second overflow mouth with flow channel intercommunication, second axle housing assembly includes second axle housing cavity, second overflow mouth intercommunication second axle housing cavity.

14. The drive axle of claim 1 further comprising a spoiler disposed on the motor shaft, the spoiler being positioned within the axle housing assembly.

15. The drive axle of claim 1, wherein the motor assembly further comprises an oil seal assembly that seals a clearance between the motor shaft and a motor housing of the motor assembly.

16. The transaxle of claim 1 wherein the speed reduction device is a multi-speed reducer.

17. A vehicle, characterized in that it comprises a drive axle according to any one of claims 1-16.

Images