CN115234641A - Speed reducer assembly and drive axle assembly - Google Patents

Abstract

The invention relates to a reducer assembly and a drive axle assembly. The reducer assembly includes a planetary gear train, a sun gear, a planet carrier, a first motor, a fixed gear sleeve and a sliding gear sleeve; the sliding gear sleeve can be along its axial direction. Reciprocating to switch between the first gear and the second gear, so that the planetary gear train is in the direct gear and the reduction gear correspondingly. The above-mentioned reducer assembly, by moving the sliding gear sleeve along the axial direction of the sliding gear sleeve, makes the sliding gear sleeve switch between the first gear and the third gear, so that the planetary gear train is corresponding to the direct gear and the reduction gear. , when the vehicle is heavily loaded, switch to the deceleration gear to increase the torque capacity, and switch to the direct gear when the vehicle is lightly loaded or unloaded to reduce energy consumption.

Description

Reducer assembly and drive axle assembly

technical field

The invention relates to the technical field of vehicle axles, in particular to a reducer assembly and a drive axle assembly.

Background technique

The planetary gear reducer is a speed converter that uses gears to reduce the number of revolutions of the motor to the required number of revolutions and obtain a power transmission mechanism with a large torque. The planetary gear reducer is widely used in the drive of vehicles. on the bridge.

However, since this kind of drive axle does not have a switching mechanism for the reduction gear and the direct gear, the energy consumption of the vehicle is relatively high, and the vehicle's demand for high efficiency and low energy consumption cannot be satisfied.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a reducer assembly and a drive axle assembly in order to solve the problem of high energy consumption of the vehicle due to the lack of a switching mechanism for the reduction gear and the direct gear in the drive axle currently using the planetary gear reducer. , The reducer assembly is provided with a switching mechanism for the reduction gear and the direct gear, thereby reducing energy consumption and saving fuel.

According to an aspect of the present application, an embodiment of the present application provides a reducer assembly, including a planetary gear train, and the reducer assembly further includes:

Sun gear;

a planet carrier, sleeved on the sun gear;

a first motor, located at one end of the sun gear along its axial direction;

a fixed gear sleeve, sleeved on the sun gear and located between the planet carrier and the first motor;

A sliding gear sleeve is sleeved on the planet carrier, and the sliding gear sleeve can reciprocate along its axial direction;

The opposite ends of the sliding gear sleeve along its axial direction are respectively provided with internal splines, and the sliding gear sleeve has a first gear position and a second gear position;

When the sliding gear sleeve is in the first gear position, the two inner splines are respectively engaged with the planet carrier and the fixed gear sleeve through splines, so that the planetary gear train is in direct gear; When the sliding gear sleeve is in the second gear position, the two inner splines are respectively engaged with the planet carrier and the motor through splines, so that the planetary gear train is in a reduction gear.

In one of the embodiments, the speed reducer assembly further includes a shift fork;

The outer circumferential surface of the sliding gear sleeve is provided with an annular installation groove; the shifting fork is installed in the annular installation groove, and is used to toggle the sliding tooth sleeve to make the sliding tooth sleeve move back and forth along its axial direction .

In one embodiment, the first motor includes a first motor rotor mounted on one side of the sun gear, and a first motor stator sleeved outside the first motor rotor;

The first motor rotor is rotatably connected to the first motor stator around the axis of the sun gear, and the first motor rotor is engaged with the sun gear through splines;

When the sliding gear sleeve is in the second gear position, the outer peripheral side of the first motor stator is connected with one of the inner splines through a spline.

In one of the embodiments, the first motor stator is provided with a first cavity and a second cavity arranged in sequence along the axial direction of the sun gear, and the first cavity is used for accommodating the first motor rotor, the second cavity communicates with the first cavity close to the side of the sun gear;

The reducer assembly further includes a first bearing disposed in the second cavity;

One end of the sun gear passes through the first bearing and extends into the first cavity to be connected with the first motor rotor, and the sun gear is connected to the first motor by means of the first bearing. The motor stator is connected in rotation.

In one of the embodiments, the reducer assembly further includes two sets of first needle roller bearings;

The outer circumferential surfaces of the opposite ends of the fixed gear sleeve along its axial direction are respectively provided with installation steps; A needle bearing is rotatably connected with the first motor stator and the planet carrier around the axis of the sun gear.

In one of the embodiments, the reducer assembly further includes a second motor;

The second motor includes a second motor rotor mounted on a side of the sun gear away from the first motor, and a second motor stator sleeved outside the second motor rotor;

The second motor rotor is rotatably connected to the second motor stator around the axis of the sun gear, and the second motor rotor and the sun gear are engaged by splines;

Both the first motor and the second motor are used to provide driving force for the reducer assembly.

In one embodiment, the second motor stator is provided with a third cavity and a fourth cavity 1712 arranged in sequence along the axial direction of the sun gear, and the third cavity is used for accommodating the second motor rotor , the fourth cavity 1712 communicates with the side of the third cavity close to the sun gear;

The reducer assembly further includes a second bearing disposed in the fourth cavity 1712;

The end of the sun gear away from the first motor is passed through the second bearing and protrudes into the third cavity to be connected with the rotor of the second motor, and the sun gear is connected with the second bearing by means of the second bearing It is rotatably connected with the stator of the second motor.

In one of the embodiments, the reducer assembly further includes a second needle bearing;

The second needle bearing is arranged between the planet carrier and the second motor stator, and the planet carrier rotates around the axis of the sun gear and the second motor stator by means of the second needle bearing connect.

In one of the embodiments, the reducer assembly further includes a third bearing;

the third bearing is sleeved on the sun gear;

The planet carrier is arranged on the sun gear by means of the third bearing and is rotatably connected with the sun gear around the axis of the sun gear.

According to another aspect of the present application, an embodiment of the present application further provides a drive axle assembly, wherein the drive axle assembly includes the above-mentioned reducer assembly.

The above reducer assembly, by moving the sliding gear sleeve along the axial direction of the sliding gear sleeve, makes the sliding gear sleeve switch between the first gear and the third gear, so that the planetary gear train is corresponding to the direct gear and the reduction gear. . In this way, when the vehicle is fully loaded or heavily loaded, the planetary gear train is switched to the reduction gear by moving the sliding gear sleeve to increase the torque capacity, and when the vehicle is lightly or idly loaded, the planetary gear train is switched to the direct to reduce energy consumption.

Description of drawings

FIG. 1 is a schematic cross-sectional view of the assembly of a reducer assembly 100 according to an embodiment of the present invention;

2 is a schematic partial cross-sectional view of the sliding gear sleeve in the first gear position according to an embodiment of the present invention;

3 is a partial cross-sectional schematic view of the sliding gear sleeve in the second gear position according to an embodiment of the present invention;

4 is a schematic partial cross-sectional view of the sliding gear sleeve in the third gear position according to an embodiment of the present invention;

5 is a schematic cross-sectional view of the assembly of a drive axle assembly in an embodiment of the present invention.

Description of reference numbers:

10, drive axle assembly; 100, reducer assembly; 110, planetary gear train; 104, third bevel gear; 105, second nut; 106, fifth bearing; 107, second retaining ring; 108, cylindrical gear ; 109, the first bevel gear; 111, the spacer; 112, the planetary gear; 113, the third needle bearing; 114, the ring gear; 115, the planetary gear; 116, the planetary gear shaft; , planetary gear shaft; 119, second bevel gear; 120, sun gear; 121, sun gear spline shaft; 122, sun gear shaft diameter; 123, sun gear cylindrical teeth; 130, planet carrier; 131, planet carrier spline shaft; 140, the first motor; 141, the first motor stator; 1411, the first cavity; 1412, the motor stator spline shaft; 1413, the second cavity; 142, the first motor rotor; 150, the fixed gear sleeve; 151, the fixed gear Sleeve spline shaft; 160, sliding gear sleeve; 161, internal spline; 162, annular mounting groove; 170, second motor; 171, second motor stator; 1711, third cavity; 1712, fourth cavity; 172, The second motor rotor; 181, the third bearing; 182, the first nut; 183, the first retaining ring; 184, the first bearing; 185, the first needle bearing; 186, the first washer; 187, the shift fork; 188, the second bearing; 189, the second gasket; 191, the second needle bearing; 192, the third gasket; 11, the driven bevel gear assembly; 12, the driving bevel gear assembly; 13, the transmission shaft; 14. The first differential assembly; 15. The second differential assembly.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "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 accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When 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 similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

FIG. 1 shows a schematic cross-sectional view of the assembly of a reducer assembly 100 according to an embodiment of the present invention.

Referring to FIG. 1 , the present application provides a reducer assembly 100 including a planetary gear train 110 , a sun gear 120 , a planet carrier 130 , a first motor 140 , a fixed gear sleeve 150 and a sliding gear sleeve 160 . The sliding gear sleeve 160 can move along its axial direction and has a first gear and a second gear. When the sliding gear sleeve 160 is in the first gear, the planetary gear train 110 is in a direct gear (the direct gear is a constant speed gear). ); when the sliding gear sleeve 160 is in the second gear, the planetary gear train 110 is in a reduction gear.

In this way, by moving the sliding gear sleeve 160 , the planetary gear train 110 can be switched between the direct gear and the reduction gear. When the vehicle is heavily loaded, the planetary gear train can be switched to the reduction gear by moving the sliding gear sleeve 160 to increase the torque. When the vehicle is lightly loaded or unloaded, the planetary gear train is switched to the direct gear by moving the sliding gear sleeve 160, thereby reducing energy consumption.

Referring to FIG. 1 , the sun gear 120 extends longitudinally along its axial direction. The sun gear 120 is sequentially provided with a sun gear spline shaft 121 , a sun gear shaft diameter 122 , and a sun gear spline shaft 121 from the end close to the first motor 140 to the end away from the first motor 140 . Gear cylindrical teeth 123 , sun gear shaft diameter 122 and sun gear spline shaft 121 . The sun gear cylindrical teeth 123 are arranged on the outer circumferential surface of the sun gear 120 and cooperate with the planetary gear train 110 , and the diameter of the shaft where the sun gear cylindrical teeth 123 are located is larger than the diameter of the sun gear shaft diameter 122 .

The planet carrier 130 has a revolving body structure and is sleeved on the sun gear 120 . The planet carrier 130 is provided with a planet carrier spline shaft 131 on the outer circumferential surface of the planet carrier 130 facing the first motor 140 and away from the sun gear 20 .

In one embodiment, the reducer assembly 100 includes two planet carriers 130 , the two planet carriers 130 are spaced apart from the sun gear 120 and located on opposite sides of the sun gear cylindrical teeth 123 along the axial direction of the sun gear 120 . Specifically, the reducer assembly 100 further includes two third bearings 181 . The two third bearings 181 are respectively mounted on the two sun gear shaft diameters 122 of the sun gear 120 and abut against the shaft edges where the cylindrical teeth 123 of the sun gear are located. On the opposite sides in the axial direction, the two planet carriers 130 are arranged on the sun gear 120 by means of the two third bearings 181 .

In this way, by installing the two planetary carriers 130 on the sun gear 120 through the two third bearings 181 , the planetary carriers 130 and the sun gear 120 can be rotated relative to each other for power transmission, and the planetary carrier 120 can be restricted from moving in its axial direction. .

In some embodiments, the reducer assembly 100 further includes two first nuts 182 and two first retaining rings 183 . The two first nuts 182 are spaced apart from the sun gear shaft diameter 122 and located along the two third bearings 181 . The sides thereof axially face away from each other. An annular groove is formed on the side of the planet carrier 130 facing the sun gear 120 along the circumferential direction of the planet carrier 130 .

In this way, by arranging the first nut 182 and the first retaining ring 183, the third bearing 181 can be restricted from moving in its axial direction, which is beneficial to restricting the axial movement of the planet carrier 130 and avoids the process of moving the sliding gear sleeve 160. , causing the planet carrier 130 to also move.

The first motor 140 has a rotary body structure as a whole, and is disposed at one end of the sun gear 120 along its axial direction. The first motor 140 includes a first motor stator 141 and a first motor rotor 142 . The first motor stator 141 is disposed on the sun gear spline shaft 121 close to the fixed gear sleeve 150 , and the first motor stator 141 is provided with a first cavity 1411 and a second cavity 1413 arranged in sequence along the axial direction of the sun gear 120 , The second cavity 1413 communicates with the side of the first cavity 1411 close to the sun gear 120 , and the outer circumferential surface of one end of the first motor stator 141 facing the planet carrier 130 is provided with a motor stator spline shaft 1412 . The first motor rotor 142 is mounted on the sun gear spline shaft 121 close to the fixed gear sleeve 150 , and is accommodated in the first cavity 1411 opened by the first motor stator 141 .

In this way, the first motor 140 is connected to the sun gear spline shaft 121 through the first motor rotor 142 , so as to provide driving force for the sun gear 120 .

In some embodiments, the reducer assembly 100 further includes a first bearing 184 disposed within the second cavity 1413 . The first bearing 184 is installed on the sun gear spline shaft 121 close to the fixed gear sleeve 150 , and one end of the sun gear 120 passes through the first bearing 184 and extends into the first cavity 1411 to connect with the first motor rotor 142 , the sun gear 120 is rotatably connected with the first motor stator 141 by means of the first bearing 184 , that is, the end of the first motor stator 141 facing the fixed gear sleeve 150 is set on the sun gear spline shaft 121 close to the fixed gear sleeve 150 through the first bearing 184 superior.

In this way, by installing the first motor stator 141 on the sun gear 120 through the first bearing 184, the first motor stator 141 and the sun gear 120 can be rotated relative to each other for power transmission, and the first motor stator 141 can be restricted along its axis to move.

The fixed gear sleeve 150 has a rotary structure as a whole, and is sleeved on the sun gear 120 and located between the planet carrier 130 and the first motor 140 . The outer circumferential surface of the fixed gear sleeve 150 away from the sun gear 20 is provided with a fixed gear sleeve spline shaft 151 , and the outer outer surfaces of the opposite ends of the fixed gear sleeve 150 along the axial direction thereof are respectively provided with installation steps.

In some embodiments, the reducer assembly 100 further includes two sets of first needle roller bearings 185 and two first washers 186 , and the two sets of first needle roller bearings 185 are respectively installed on the two installations opened by the fixed gear sleeve 150 . On the steps, the first spacers 186 are in a "T" shape, and the two first spacers 186 are respectively mounted on the two mounting steps and located on the sides of the two sets of first needle roller bearings 185 away from each other. As can be seen from FIG. 1 , the first motor stator 141 , the two sets of first needle bearings 185 , the two first washers 186 , the fixed gear sleeve 150 and the planetary carrier 130 near the first motor 140 abut against each other.

In this way, by arranging the first needle bearing 185 and the first washer 186 , the fixed gear sleeve 150 can be restricted from moving in its axial direction, and at the same time, the first motor stator 141 and the planet carrier 130 close to the first motor 140 can be further restricted. Moving along the axial direction of the planetary carrier 130 and disposing the two sets of first needle bearings 185 can make the fixed gear sleeve 150 rotate relative to the first motor stator 141 and the planetary carrier 130 close to the first motor 140 , so as to transmit power.

The sliding gear sleeve 160 has a revolving body structure and is sleeved on the planet carrier 130 . The sliding gear sleeve 160 can reciprocate along its axial direction. Internal splines 161 are respectively provided, and the sliding gear sleeve 160 has a first gear position and a second gear position during the moving process.

Fig. 2 shows a partial cross-sectional schematic diagram of the sliding gear sleeve in the first gear position according to an embodiment of the present invention, and Fig. 3 shows a partial cross-sectional schematic diagram of the sliding gear sleeve in the second gear position according to an embodiment of the present invention, FIG. 4 shows a partial cross-sectional schematic diagram of the sliding gear sleeve in the third gear position according to an embodiment of the present invention.

Referring to FIG. 2 , when the sliding gear sleeve 160 is in the first gear position, the sliding gear sleeve 160 moves to the two inner splines 161 to engage with the fixed gear sleeve spline shaft 151 and the planet carrier spline shaft 131 respectively, so that the planetary gear System 110 is in direct gear.

Referring to FIG. 3 , when the sliding gear sleeve 160 is in the second gear position, the sliding gear sleeve 160 moves to the two inner splines 161 to engage with the planet carrier spline shaft 131 and the motor stator spline shaft 1412 respectively, so that the planetary gear train 110 is in downshift.

In some embodiments, the sliding sleeve 160 also has a third gear, and when the sliding sleeve 160 is in the third gear, the planetary gear train 110 is in neutral. Referring to FIG. 4 , when the sliding gear sleeve 160 is in the third gear position, the sliding gear sleeve 160 moves to the inner spline 161 on the side close to the planet carrier 130 and engages with the planet carrier spline shaft 131 , and the other inner spline 161 is suspended, so that the planetary gear train 110 is in neutral.

Referring to FIG. 1 , in some embodiments, the retarder assembly 100 further includes a shift fork 187 . An annular mounting groove 162 is defined on the outer circumferential surface of the sliding gear sleeve 160 , and the shifting fork 187 is installed in the annular mounting groove 162 to toggle the sliding gear sleeve 160 to reciprocate the sliding gear sleeve 160 along its axial direction.

Referring to FIG. 1 , in some embodiments, the reducer assembly 100 further includes a second motor 170 for providing driving force for the reducer assembly 100 . The second motor 170 has a rotary body structure and includes a second motor stator 171 and a second motor rotor 172 . The second motor stator 171 is disposed on the sun gear spline shaft 121 away from the first motor 140 , and the second motor stator 171 is internally provided There are a third cavity 1711 and a fourth cavity 1712 arranged in sequence along the axial direction of the sun gear 120. The fourth cavity 1712 communicates with the side of the third cavity 1711 close to the sun gear 120, and the second motor rotor 172 is installed away from the first motor. 140 of the sun gear spline shaft 121 and located in the third cavity 1711.

In some embodiments, the reducer assembly further includes a second bearing 188 , a second spacer 189 , a second needle bearing 191 and a third spacer 192 . The second bearing 188 is installed on the shaft diameter 122 of the sun gear close to the second motor 170 and is arranged in the fourth cavity 1712 . The end of the sun gear 120 away from the first motor 140 is penetrated through the second bearing 188 and extends into the third cavity 1711 In order to connect with the second motor rotor 172 , the sun gear 120 is rotatably connected with the second motor stator 171 by means of the second bearing 188 , that is, the second motor stator 171 is set through the second bearing 188 near the sun gear shaft diameter of the second motor 170 . 122 on.

The second washer 189 , the second needle bearing 191 and the third washer 192 are sequentially disposed on the sun gear 120 along the axial direction of the sun gear 120 and abut each other to restrict the second motor stator 171 from approaching the second motor 170 The planet carrier 130 moves along the axial direction of the planet carrier 130 , and by arranging the second bearing 188 and the needle bearing 130 , the relative rotation of the second motor stator 171 , the sun gear 120 and the planet carrier 130 can be close to the second motor 170 . As for the specific structures of the second gasket 189 and the third gasket 192 and some holes opened for structural assembly, reference may be made to FIG. 1 , which will not be repeated here.

1, the planetary gear train 110 includes a second nut 105, a fifth bearing 106, a second retaining ring 107, a cylindrical gear 108, a first bevel gear 109, a spacer ring 111, a planetary gear 112, a third needle bearing 113, The ring gear 114 , the planetary gears 115 , the planetary gear shafts 116 , the planetary gear spacers 117 , the planetary gear shafts 118 , the second bevel gear 119 and the third bevel gear 104 .

Specifically, the sun gear 120 is provided with sun gear cylindrical teeth 123 along its outer circumferential surface, the sun gear cylindrical teeth 123 mesh with the cylindrical teeth of the plurality of planetary gears 112 of the planetary gear train 110, and the planetary gears 112 are sleeved on the planetary gear shaft 118, And a third needle roller bearing 113 is installed between the planetary wheel shaft 118 and the planetary wheel 112 , the circular hole of the planetary wheel 112 is matched with the third needle roller bearing 113 , and the shaft diameter of the planetary wheel shaft 118 is matched with the third needle roller bearing 113 . A plurality of spacers 111 are respectively arranged at opposite ends of the planetary wheel shaft 118 along its axial direction for axial limit of the planetary wheel shaft 118; a plurality of planetary wheel spacers 110 are arranged on both end faces of the planetary wheel 112 along its axial direction; The other end face of the spacer 111 is connected to the fifth bearing 106 ; the fifth bearing 106 is installed on the planet carrier 104 , the end of the spacer 111 away from the planetary wheel shaft 118 abuts on the fifth bearing 106 , and the spur gear 108 is installed by means of the fifth bearing 106 At the end of the planet carrier 130 close to the first motor 140 away from the fixed gear sleeve 150; the second nut 105 is mounted on the planet carrier 104 and abuts on the end of the fifth bearing 106 away from the spacer 111 to limit the bearing together with the spacer 111 6 moves along its axial direction; the cylindrical gear 108 is provided with a ring groove for installing the second retaining ring 107, and the second retaining ring 107 is used to limit the movement of the bearing 6 along its axial direction; the cylindrical teeth of the plurality of planetary gears 112 and The cylindrical gear holes of the ring gear 114 are meshed; the ring gear 114 adopts distributed blind holes, which are connected with the circular holes of the planetary gear shaft 116 and are welded by annular welding; In cooperation, the bevel teeth of the planetary gear 115 mesh with the bevel teeth of the first bevel gear 109 ; the lower plane of the planetary gear 115 is fitted with the plane of the ring gear 114 ; the circular hole of the first bevel gear 109 is connected with the shaft diameter of the cylindrical gear 108 And use annular welding seam welding; the cylindrical teeth of the cylindrical gear 108 mesh with the cylindrical teeth of the differential assembly 3; the second bevel gear 119 and the third bevel gear 104 are welded by annular welding seam; the cone of the third bevel gear 104 The teeth mesh with the conical teeth of the planetary gear 115 to realize the differential function.

It should be noted that when the sliding gear sleeve 160 is in the first gear position, the sliding gear sleeve 160 moves to the two inner splines 161 to mesh with the fixed gear sleeve spline shaft 151 and the planet carrier spline shaft 131 respectively. The wheel 120 , the planet carrier 130 and the ring gear 114 are all fixed relative to the first motor stator 141 , that is, they can be regarded as the input end of the driving force, the third bevel gear 104 , the first bevel gear 109 , the planetary gear 112. The planetary gear 115 is in constant speed gear; when the sliding gear sleeve 160 is in the second gear, the sliding gear sleeve 160 moves to the two inner splines 161 to mesh with the planet carrier spline shaft 131 and the motor stator spline shaft 1412 respectively At this time, the planet carrier 130 is fixed relative to the first motor stator 141, the driving force is input through the sun gear 120, and then output through the ring gear 114. The third bevel gear 104, the first bevel gear 109, the planetary gear 112, and the planetary gear 115 are in Reduction gear; when the sliding gear sleeve 160 is in the third gear, the sliding gear sleeve 160 moves to the inner spline 161 on the side close to the planet carrier 130 to engage with the planet carrier spline shaft 131, and the other inner spline 161 is suspended, this When the sun gear 120 , the planet carrier 130 and the ring gear 114 are not fixed relative to the first motor stator 141 , the third bevel gear 104 , the first bevel gear 109 , the planetary gear 112 and the planetary gear 115 are in neutral.

FIG. 5 shows a schematic cross-sectional view of the assembly of a drive axle assembly in an embodiment of the present invention.

Referring to FIG. 5 , the present application also provides a drive axle assembly 10 , including the above-mentioned reducer assembly 100 . The drive axle assembly 10 further includes a driven bevel gear assembly 11 , a driving bevel gear assembly 12 , a transmission shaft 13 , a first differential assembly 14 and a second differential assembly 15 .

The flange of the driven bevel gear assembly 11 is bolted to the flange of the drive shaft 13, and the bevel teeth of the driven bevel gear assembly 11 mesh with the bevel teeth of the second bevel gear 119; the drive shaft 13 passes through the flange The screw connection structure is connected with the driving bevel gear assembly 12, and the bevel gear of the driving bevel gear assembly 12 meshes with the bevel gear of the second differential assembly 15; the cylindrical gear of the first differential assembly 14 and the cylindrical gear 108 mesh. The detailed assembly of the drive axle assembly 10 will not be repeated here.

To sum up, by moving the sliding gear sleeve 160, the planetary gear train 110 can be freely switched between the direct gear and the reduction gear, and when the vehicle is heavily loaded, it can be switched to the reduced gear to improve the torque capacity, and when the vehicle is lightly loaded or idling Switch to direct gear to reduce energy consumption.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (10)

1. A reducer assembly, comprising a planetary gear train, characterized in that the reducer assembly further comprises: Sun gear; a planet carrier, sleeved on the sun gear; a first motor, located at one end of the sun gear along its axial direction; a fixed gear sleeve, sleeved on the sun gear and located between the planet carrier and the first motor; A sliding gear sleeve is sleeved on the planet carrier, and the sliding gear sleeve can reciprocate along its axial direction; The opposite ends of the sliding gear sleeve along its axial direction are respectively provided with internal splines, and the sliding gear sleeve has a first gear position and a second gear position; When the sliding gear sleeve is in the first gear position, the two inner splines are respectively engaged with the planet carrier and the fixed gear sleeve through splines, so that the planetary gear train is in direct gear; When the sliding gear sleeve is in the second gear position, the two inner splines are respectively engaged with the planet carrier and the motor through splines, so that the planetary gear train is in a reduction gear. 2. The reducer assembly according to claim 1, wherein the reducer assembly further comprises a shift fork; The outer circumferential surface of the sliding gear sleeve is provided with an annular installation groove; the shifting fork is installed in the annular installation groove, and is used to toggle the sliding tooth sleeve to make the sliding tooth sleeve move back and forth along its axial direction . 3 . The reducer assembly according to claim 1 , wherein the first motor comprises a first motor rotor mounted on one side of the sun gear, and a first motor rotor sleeved outside the first motor rotor. 4 . the first motor stator; The first motor rotor is rotatably connected to the first motor stator around the axis of the sun gear, and the first motor rotor is engaged with the sun gear through splines; When the sliding gear sleeve is in the second gear position, the outer peripheral side of the first motor stator is connected with one of the inner splines through a spline. 4 . The reducer assembly according to claim 3 , wherein the first motor stator is provided with a first cavity and a second cavity sequentially arranged along the axial direction of the sun gear, and the first The cavity is used for accommodating the first motor rotor, and the second cavity communicates with the side of the first cavity close to the sun gear; The reducer assembly further includes a first bearing disposed in the second cavity; One end of the sun gear passes through the first bearing and extends into the first cavity to be connected with the first motor rotor. The sun gear is connected to the first motor by means of the first bearing. The motor stator is connected in rotation. 5. The reducer assembly according to claim 3, wherein the reducer assembly further comprises two sets of first needle roller bearings; The outer circumferential surfaces of the opposite ends of the fixed gear sleeve along its axial direction are respectively provided with installation steps; the two groups of first needle roller bearings are respectively installed on the two installation steps, and the fixed gear sleeve is supported by two A needle bearing is rotatably connected with the first motor stator and the planet carrier around the axis of the sun gear. 6. The reducer assembly of claim 3, wherein the reducer assembly further comprises a second motor; The second motor includes a second motor rotor mounted on a side of the sun gear away from the first motor, and a second motor stator sleeved outside the second motor rotor; The second motor rotor is rotatably connected to the second motor stator around the axis of the sun gear, and the second motor rotor and the sun gear are engaged by splines; Both the first motor and the second motor are used to provide driving force for the reducer assembly. 7 . The reducer assembly according to claim 6 , wherein the second motor stator is provided with a third cavity and a fourth cavity 1712 arranged in sequence along the axial direction of the sun gear. Three cavities are used to accommodate the second motor rotor, and the fourth cavity 1712 communicates with the side of the third cavity close to the sun gear; The reducer assembly further includes a second bearing disposed in the fourth cavity 1712; The end of the sun gear away from the first motor is passed through the second bearing and extends into the third cavity to be connected with the rotor of the second motor, and the sun gear uses the second bearing It is rotatably connected with the stator of the second motor. 8. The reducer assembly of claim 6, wherein the reducer assembly further comprises a second needle bearing; The second needle bearing is arranged between the planet carrier and the second motor stator, and the planet carrier rotates around the axis of the sun gear and the second motor stator by means of the second needle bearing connect. 9. The reducer assembly of claim 1, wherein the reducer assembly further comprises a third bearing; the third bearing is sleeved on the sun gear; The planet carrier is arranged on the sun gear by means of the third bearing and is rotatably connected with the sun gear around the axis of the sun gear. 10. A drive axle assembly, characterized in that the drive axle assembly comprises the reducer assembly according to any one of claims 1-9.

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