CN115234641A - Speed reducer assembly and drive axle assembly - Google Patents
Speed reducer assembly and drive axle assembly Download PDFInfo
- Publication number
- CN115234641A CN115234641A CN202210957243.9A CN202210957243A CN115234641A CN 115234641 A CN115234641 A CN 115234641A CN 202210957243 A CN202210957243 A CN 202210957243A CN 115234641 A CN115234641 A CN 115234641A
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- gear
- motor
- sun gear
- sleeve
- cavity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Retarders (AREA)
Abstract
The invention relates to a speed reducer assembly and a drive axle assembly, wherein the speed reducer assembly comprises 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 move back and forth along the axial direction of the sliding gear sleeve to switch between a first gear and a second gear, so that the planetary gear train is correspondingly in a direct gear and a speed reduction gear. According to the speed reducer assembly, the sliding gear sleeve is moved in the axial direction of the sliding gear sleeve, so that the sliding gear sleeve is switched between the first gear and the third gear, the planetary gear train is correspondingly positioned in a direct gear and a speed reduction gear, the speed reduction gear is switched when a vehicle is in a heavy load state, the torque capacity is improved, the direct gear is switched when the vehicle is in a light load state or in a no-load state, and the energy consumption is reduced.
Description
Technical Field
The invention relates to the technical field of automobile axles, in particular to a speed reducer assembly and a drive axle assembly.
Background
A planetary gear reducer is a power transmission mechanism that uses a speed converter of a gear to reduce the number of revolutions of a motor to a desired number of revolutions and obtain a large torque, and is widely used in a transaxle of a vehicle.
However, the energy consumption of the vehicle is high due to the fact that the drive axle is not provided with a switching mechanism of the speed reduction gear and the direct gear, and the requirements of the vehicle on high efficiency and low energy consumption cannot be met.
Disclosure of Invention
Therefore, it is necessary to provide a speed reducer assembly and a drive axle assembly for solving the problem that the energy consumption of a vehicle is high due to the fact that a speed reduction gear and direct gear switching mechanism is not arranged in a drive axle adopting a planetary gear train speed reducer at present, wherein the speed reducer assembly is provided with the speed reduction gear and direct gear switching mechanism, so that the energy consumption is reduced, and fuel is saved.
According to one aspect of the present application, embodiments of the present application provide a reducer assembly including a planetary gear train, the reducer assembly further including:
a sun gear;
the planet carrier is sleeved on the sun gear;
the first motor is arranged at one end of the sun wheel along the axial direction of the sun wheel;
the fixed gear sleeve is sleeved on the sun gear and is positioned between the planet carrier and the first motor;
the sliding gear sleeve is sleeved on the planet carrier and can move back and forth along the axial direction of the sliding gear sleeve;
the sliding gear sleeve is provided with a first gear and a second gear;
when the sliding gear sleeve is in a first gear, the two internal splines are respectively meshed with the planet carrier and the fixed gear sleeve through the splines, so that the planetary gear train is in a direct gear; when the sliding gear sleeve is in a second gear, the two internal splines are respectively meshed with the planet carrier and the motor through the splines, so that the planetary gear train is in a speed reduction gear.
In one embodiment, the retarder assembly further comprises a shift fork;
the outer circumferential surface of the sliding gear sleeve is provided with an annular mounting groove; the shifting fork is arranged in the annular mounting groove and used for shifting the sliding gear sleeve so as to enable the sliding gear sleeve to move in a reciprocating mode along the axial direction of the sliding gear sleeve.
In one embodiment, the first motor comprises a first motor rotor arranged on one side of the sun gear, and a first motor stator sleeved outside the first motor rotor;
the first motor rotor is rotationally connected with the first motor stator around the axis of the sun gear, and the first motor rotor is meshed with the sun gear through a spline;
when the sliding gear sleeve is in a second gear, the outer peripheral side of the first motor stator is connected with one of the internal splines through a spline.
In one embodiment, a first cavity and a second cavity are sequentially arranged in the first motor stator along the axial direction of the sun gear, the first cavity is used for accommodating the first motor rotor, and the second cavity is communicated with one side of the first cavity, which is close to the sun gear;
the speed reducer assembly further comprises a first bearing arranged in the second cavity;
one end of the sun wheel penetrates through the first bearing and extends into the first cavity to be connected with the first motor rotor, and the sun wheel is rotationally connected with the first motor stator through the first bearing.
In one embodiment, the reducer assembly further comprises two sets of first needle bearings;
the outer circumferential surfaces of the two opposite ends of the fixed gear sleeve along the axial direction are respectively provided with an installation step; two groups of first needle bearings are respectively arranged on the two mounting steps, and the fixed gear sleeve is rotationally connected with the first motor stator and the planet carrier around the axis of the sun gear by means of the two first needle bearings.
In one embodiment, the speed reducer assembly further comprises a second electric machine;
the second motor comprises a second motor rotor and a second motor stator, wherein the second motor rotor is arranged on one side of the sun gear, which is far away from the first motor, and the second motor stator is sleeved outside the second motor rotor;
the second motor rotor is rotatably connected with the second motor stator around the axis of the sun gear, and the second motor rotor is meshed with the sun gear through a spline;
the first motor and the second motor are used for providing driving force for the speed reducer assembly.
In one embodiment, a third cavity and a fourth cavity 1712 are sequentially arranged in the second motor stator along the axial direction of the sun gear, the third cavity is used for accommodating the second motor rotor, and the fourth cavity 1712 is communicated with one side, close to the sun gear, of the third cavity;
the reducer assembly further comprises a second bearing disposed in the fourth cavity 1712;
one end of the sun gear, which is far away from the first motor, penetrates through the second bearing and extends into the third cavity so as to be connected with the second motor rotor, and the sun gear is rotationally connected with the second motor stator by virtue of the second bearing.
In one embodiment, 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 is rotationally connected with the second motor stator around the axis of the sun gear by means of the second needle bearing.
In one embodiment, the reducer assembly further comprises a third bearing;
the third bearing is sleeved on the sun wheel;
the planet carrier is arranged on the sun gear through the third bearing and is connected with the sun gear in a rotating mode around the axis of the sun gear.
According to another aspect of the present application, there is also provided a drive axle assembly including the above-mentioned speed reducer assembly.
According to the speed reducer assembly, the sliding gear sleeve is moved along the axial direction of the sliding gear sleeve, so that the sliding gear sleeve is switched between the first gear and the third gear, and the planetary gear train is correspondingly positioned in a direct gear and a speed reduction gear. Therefore, when the vehicle is fully loaded or heavily loaded, the planetary gear train is switched to the speed reduction gear by moving the sliding gear sleeve so as to improve the torque capacity, and when the vehicle is lightly loaded or unloaded, the planetary gear train is switched to the direct gear by moving the sliding gear sleeve so as to reduce the energy consumption.
Drawings
FIG. 1 is a schematic cross-sectional view illustrating the assembly of a retarder assembly 100 according to an embodiment of the present invention;
FIG. 2 is a schematic partial cross-sectional view of a sliding sleeve gear in a first gear according to an embodiment of the present invention;
FIG. 3 is a schematic partial cross-sectional view of the sliding sleeve gear in a second gear according to one embodiment of the present invention;
FIG. 4 is a schematic partial cross-sectional view of the sliding sleeve gear in a third gear in accordance with an embodiment of the present invention;
FIG. 5 is a schematic assembled cross-sectional view of a drive axle assembly in accordance with an embodiment of the present invention.
The reference numbers illustrate:
10. a drive axle assembly; 100. a reducer assembly; 110. a planetary gear train; 104. a third bevel gear; 105. a second nut; 106. a fifth bearing; 107. a second retainer ring; 108. a cylindrical gear; 109. a first conical gear; 111. a space ring; 112. a planet wheel; 113. a third needle bearing; 114. a ring gear; 115. a planetary gear; 116. a planetary gear shaft; 117. a planet wheel gasket; 118. a planetary wheel shaft; 119. a second conical gear; 120. a sun gear; 121. a sun gear spline shaft; 122. the shaft diameter of the sun wheel; 123. a sun gear cylindrical gear; 130. a planet carrier; 131. a planet carrier spline shaft; 140. a first motor; 141. a first motor stator; 1411. a first chamber; 1412. a motor stator spline shaft; 1413. a second chamber; 142. a first motor rotor; 150. fixing a gear sleeve; 151. the fixed tooth sleeve spline shaft; 160. a sliding gear sleeve; 161. an internal spline; 162. an annular mounting groove; 170. a second motor; 171. a second motor stator; 1711. a third chamber; 1712. a fourth chamber; 172. a second motor rotor; 181. a third bearing; 182. a first nut; 183. a first retainer ring; 184. a first bearing; 185. a first needle bearing; 186. a first spacer; 187. a shifting fork; 188. a second bearing; 189. a second gasket; 191. a second needle bearing; 192. a third gasket; 11. a driven bevel gear assembly; 12. a drive bevel gear assembly; 13. a drive shaft; 14. a first differential assembly; 15. a second differential assembly.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements 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. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.
FIG. 1 illustrates an assembled cross-sectional view of a retarder 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 carrier 130, a first motor 140, a fixed gear sleeve 150, and a sliding gear sleeve 160. The sliding sleeve gear 160 is capable of moving in the axial direction thereof and has a first gear position and a second gear position, and when the sliding sleeve gear 160 is in the first gear position, the planetary gear train 110 is in a direct gear (the direct gear is a constant speed gear); when sliding sleeve 160 is in the second gear, planetary gear set 110 is in the reduction gear.
Thus, the planetary gear train 110 can be switched between the direct gear and the reduction gear by moving the sliding sleeve gear 160, the planetary gear train is switched to the reduction gear by moving the sliding sleeve gear 160 when the vehicle is heavily loaded so as to improve the torque capacity, and the planetary gear train is switched to the direct gear by moving the sliding sleeve gear 160 when the vehicle is lightly loaded or unloaded so as to reduce the energy consumption.
Referring to fig. 1, the sun gear 120 extends lengthwise along the axial direction, and a sun gear spline shaft 121, a sun gear shaft diameter 122, a sun gear cylindrical tooth 123, a sun gear shaft diameter 122 and the sun gear spline shaft 121 are sequentially disposed on the sun gear 120 from the end close to the first motor 140 to the end far from the first motor 140. The sun gear cylindrical teeth 123 are annularly arranged on the outer circumferential surface of the sun gear 120 and are matched with the planetary gear train 110, and the diameter of a shaft where the sun gear cylindrical teeth 123 are located is larger than that of the shaft diameter 122 of the sun gear.
The planet carrier 130 is a revolving body structure and is sleeved on the sun gear 120, and a planet carrier spline shaft 131 is disposed on an outer circumferential surface of the planet carrier 130 facing to one end of the first motor 140 and far away from the sun gear 20.
In one embodiment, the reducer assembly 100 includes two planetary carriers 130, and the two planetary carriers 130 are spaced apart from the sun gear 120 and located on opposite sides of the cylindrical teeth 123 of the sun gear 120 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 two sun gear shaft diameters 122 of the sun gear 120 and abut against two opposite sides of the shaft where the sun gear cylindrical teeth 123 are located along the axial direction thereof, and the two planet carriers 130 are disposed on the sun gear 120 via the two third bearings 181.
In this way, by mounting the two carriers 130 to the sun gear 120 via the two third bearings 181, the carriers 130 and the sun gear 120 can be rotated relative to each other to transmit power, and the movement of the carriers 120 in the axial direction thereof can be restricted.
In some embodiments, the speed reducer assembly 100 further includes two first nuts 182 and two first retainer rings 183, the two first nuts 182 being spaced apart from the sun gear shaft diameter 122 and located on a side of the two third bearings 181 facing away from each other in the axial direction thereof. An annular groove is formed in one side of the planet carrier 130 facing the sun gear 120 along the circumferential direction of the planet carrier 130, and the two first retaining rings 183 are respectively arranged in the annular grooves formed in the two planet carriers 130.
Thus, by arranging the first nut 182 and the first retainer ring 183, the third bearing 181 can be limited from moving in the axial direction, so that the movement of the planet carrier 130 in the axial direction is limited, and the movement of the planet carrier 130 caused by the movement of the sliding gear sleeve 160 is avoided.
The first motor 140 is a revolving body structure, and is disposed at one end of the sun gear 120 along the axial direction thereof, and 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 a first cavity 1411 and a second cavity 1413 which are sequentially disposed along the axial direction of the sun gear 120 are disposed in the first motor stator 141, the second cavity 1413 is communicated with one side of the first cavity 1411 close to the sun gear 120, and a motor stator spline shaft 1412 is disposed on an outer circumferential surface of one end of the first motor stator 141 facing the planet carrier 130. 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 a first cavity 1411 formed in the first motor stator 141.
As such, the first motor 140 is connected to the sun gear spline shaft 121 through the first motor rotor 142, thereby providing a driving force to the sun gear 120.
In some embodiments, the reducer assembly 100 also includes a first bearing 184 disposed within the second cavity 1413. First bearing 184 is installed on being close to the sun gear integral key shaft 121 of fixed tooth cover 150, and the one end of sun gear 120 is worn to locate first bearing 184 and is stretched into in first chamber 1411 to be connected with first motor rotor 142, sun gear 120 rotates with first motor stator 141 with the help of first bearing 184 to be connected, and first motor stator 141 is located on being close to the sun gear integral key shaft 121 of fixed tooth cover 150 through first bearing 184 towards the one end of fixed tooth cover 150 promptly.
In this way, by attaching the first motor stator 141 to the sun gear 120 via the first bearing 184, the first motor stator 141 and the sun gear 120 can be relatively rotated to transmit power, and the movement of the first motor stator 141 in the axial direction thereof can be restricted.
The fixed gear sleeve 150 is integrally a revolving body structure, 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 circumferential surfaces of the fixed gear sleeve 150 along the two axial opposite ends are respectively provided with a mounting step.
In some embodiments, the reducer assembly 100 further includes two sets of first needle bearings 185 and two first spacers 186, the two sets of first needle bearings 185 are respectively mounted on two mounting steps formed on the fixed gear sleeve 150, the first spacers 186 are in a shape of a "T" placed on the side, and the two first spacers 186 are respectively mounted on the two mounting steps and located on the side of the two sets of first needle 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 spacers 186, the fixed gear sleeve 150, and the planet carrier 130 close to the first motor 140 abut against each other two by two.
In this way, by providing the first needle roller bearings 185 and the first spacers 186, the movement of the fixed sleeve 150 in the axial direction thereof can be restricted, and the movement of the first motor stator 141 and the carrier 130 close to the first motor 140 in the axial direction of the carrier 130 can be further restricted, and providing two sets of the first needle roller bearings 185 enables the fixed sleeve 150 to rotate relative to the first motor stator 141 and the carrier 130 close to the first motor 140, thereby transmitting power.
The sliding gear sleeve 160 is a revolving body structure, the planet carrier 130 is sleeved with the sliding gear sleeve 160, the sliding gear sleeve 160 can reciprocate along the axial direction of the sliding gear sleeve, the inner spline 161 is respectively arranged on one side of the sliding gear sleeve 160 facing the planet carrier 130 along the two opposite axial ends of the sliding gear sleeve 160, and the sliding gear sleeve 160 has a first gear and a second gear in the moving process.
Fig. 2 is a partially cross-sectional schematic view showing a sliding sleeve gear in a first speed in an embodiment of the present invention, fig. 3 is a partially cross-sectional schematic view showing a sliding sleeve gear in a second speed in an embodiment of the present invention, and fig. 4 is a partially cross-sectional schematic view showing a sliding sleeve gear in a third speed in an embodiment of the present invention.
Referring to fig. 2, when the sliding sleeve gear 160 is in the first gear position, the sliding sleeve gear 160 moves to have the two internal splines 161 engaged with the fixed sleeve spline shaft 151 and the carrier spline shaft 131, respectively, so that the planetary gear set 110 is in the direct gear position.
Referring to fig. 3, when the sliding gear sleeve 160 is in the second gear, the sliding gear sleeve 160 moves to engage the two internal splines 161 with the planet carrier spline shaft 131 and the motor stator spline shaft 1412, respectively, so that the planetary gear train 110 is in the reduction gear.
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 set 110 is in neutral. Referring to fig. 4, when the sliding gear sleeve 160 is in the third gear, the sliding gear sleeve 160 moves to the side close to the planet carrier 130, the internal spline 161 is engaged with the planet carrier spline shaft 131, and the other internal spline 161 is suspended, so that the planetary gear train 110 is in the neutral gear.
Referring to fig. 1, in some embodiments, the reducer assembly 100 further includes a shift fork 187. An annular mounting groove 162 is formed on an outer circumferential surface of the sliding gear sleeve 160, and a shift fork 187 is mounted in the annular mounting groove 162 and is used for shifting the sliding gear sleeve 160 so as to enable the sliding gear sleeve 160 to reciprocate along an axial direction thereof.
Referring to fig. 1, in some embodiments, the reducer assembly 100 further includes a second motor 170 for providing a driving force to the reducer assembly 100. Second motor 170 is revolution solid structure, including second motor stator 171 and second motor rotor 172, second motor stator 171 locates on keeping away from first motor 140's sun gear spline shaft 121, be equipped with third chamber 1711 and fourth chamber 1712 that set gradually along sun gear 120's axial in the second motor stator 171, fourth chamber 1712 communicates with one side that third chamber 1711 is close to sun gear 120, second motor rotor 172 installs in keeping away from first motor 140's sun gear spline shaft 121 and is located third chamber 1711.
In some embodiments, the reducer assembly further includes a second bearing 188, a second shim 189, a second needle bearing 191, and a third shim 192. The second bearing 188 is mounted on the sun gear shaft diameter 122 close to the second motor 170 and is disposed in the fourth cavity 1712, one end of the sun gear 120 far from the first motor 140 penetrates through the second bearing 188 and extends into the third cavity 1711 to be connected with the second motor rotor 172, the sun gear 120 is rotatably connected with the second motor stator 171 through the second bearing 188, that is, the second motor stator 171 is disposed on the sun gear shaft diameter 122 close to the second motor 170 through the second bearing 188.
The second spacer 189, the second needle bearing 191, and the third spacer 192 are provided in this order in the axial direction of the sun gear 120 to the sun gear 120 and abut against each other to restrict the movement of the second motor stator 171 and the carrier 130 close to the second motor 170 in the axial direction of the carrier 130, and the second motor stator 171, the sun gear 120, and the carrier 130 close to the second motor 170 can be relatively rotated by providing the second bearing 188 and the needle bearing 130. As for the specific structure of the second gasket 189 and the third gasket 192 and some holes opened for structural assembly, refer to fig. 1, which is not described herein.
Referring to fig. 1, the planetary gear train 110 includes a second nut 105, a fifth bearing 106, a second retainer 107, a cylindrical gear 108, a first conical gear 109, a spacer 111, a planetary gear 112, a third needle bearing 113, a ring gear 114, a planetary gear 115, a planetary gear shaft 116, a planetary gear spacer 117, a planetary gear shaft 118, a second conical gear 119, and a third conical gear 104.
Specifically, the sun gear 120 is provided with a sun gear cylindrical tooth 123 along the outer circumferential surface thereof, the sun gear cylindrical tooth 123 is engaged with cylindrical teeth of a plurality of planet gears 112 of the planetary gear train 110, the planet gears 112 are sleeved on the planet gear shaft 118, a third needle bearing 113 is installed between the planet gear shaft 118 and the planet gears 112, a circular hole of the planet gear 112 is matched with the third needle bearing 113, the shaft diameter of the planet gear shaft 118 is matched with the third needle bearing 113, and a plurality of space rings 111 are respectively arranged at two opposite ends of the planet gear shaft 118 along the axial direction thereof and used for axial position limitation of the planet gear shaft 118; a plurality of planet wheel gaskets 110 are arranged on two end surfaces of the planet wheel 112 along the axial direction; the other end face of the space ring 111 is connected with a fifth bearing 106; the fifth bearing 106 is mounted on the planet carrier 104, one end of the spacer ring 111, which is far away from the planet wheel shaft 118, abuts against the fifth bearing 106, and the cylindrical gear 108 is mounted on one end, which is far away from the fixed gear sleeve 150, of the planet carrier 130, which is close to the first motor 140, through the fifth bearing 106; the second nut 105 is mounted on the planet carrier 104 and abuts against one end of the fifth bearing 106, which is away from the spacer ring 111, so as to limit the movement of the bearing 6 along the axial direction thereof together with the spacer ring 111; the cylindrical gear 108 is provided with a ring groove for mounting a second retainer ring 107, and the second retainer ring 107 is used for limiting the bearing 6 to move along the axial direction of the bearing; the cylindrical teeth of the plurality of planet wheels 112 are meshed with the cylindrical tooth holes of the gear ring 114; the gear ring 114 adopts distributed blind holes, is connected with the round hole of the planet gear shaft 116 and is welded by adopting an annular welding seam; circular holes of the plurality of planetary gears 115 are matched with the shaft diameters of the planetary gear shafts 116, and conical teeth of the planetary gears 115 are meshed with conical teeth of the first conical gear 109; the lower plane of the planetary gear 115 is attached to the plane of the ring gear 114; the circular hole of the first conical gear 109 is connected with the shaft diameter of the cylindrical gear 108 and welded by an annular welding line; the cylindrical teeth of the cylindrical gear 108 are meshed with the cylindrical teeth of the differential assembly 3; the second conical gear 119 and the third conical gear 104 are welded by adopting an annular welding seam; the conical teeth of the third conical gear 104 are engaged with the conical teeth of the planetary gear 115 to realize a differential function.
It should be noted that when the sliding gear sleeve 160 is in the first gear, the sliding gear sleeve 160 moves to two internal splines 161 to engage with the fixed gear sleeve spline shaft 151 and the planet carrier spline shaft 131 respectively, and at this time, the sun gear 120, the planet carrier 130, and the ring gear 114 are all fixed relative to the first motor stator 141, that is, all of them can be regarded as an input end of the driving force, and the third bevel gear 104, the first bevel gear 109, the planet gear 112, and the planet gear 115 are in a constant speed gear; when the sliding gear sleeve 160 is in the second gear, the sliding gear sleeve 160 moves to a position where the two internal splines 161 are respectively engaged with the planet carrier spline shaft 131 and the motor stator spline shaft 1412, 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 output through the ring gear 114, and the third bevel gear 104, the first bevel gear 109, the planet gear 112 and the planet gear 115 are in the speed reduction gear; when the sliding gear sleeve 160 is in the third gear, the sliding gear sleeve 160 moves to the position where the internal spline 161 on the side close to the planet carrier 130 is meshed with the planet carrier spline shaft 131, the other internal spline 161 is suspended, at this time, the sun gear 120, the planet carrier 130 and the ring gear 114 are not fixed relative to the first motor stator 141, and the third bevel gear 104, the first bevel gear 109, the planet gears 112 and the planet gear 115 are in neutral.
FIG. 5 is a schematic assembly cross-sectional view illustrating a drive axle assembly according to an embodiment of the present invention.
Referring to FIG. 5, the present application further provides a drive axle assembly 10 including the retarder assembly 100 described above. The drive axle assembly 10 further includes a driven bevel gear assembly 11, a drive bevel gear assembly 12, a drive shaft 13, a first differential assembly 14, and a second differential assembly 15.
A flange plate of the driven bevel gear assembly 11 is connected with a flange plate of the transmission shaft 13 through bolts, and conical teeth of the driven bevel gear assembly 11 are meshed with conical teeth of the second bevel gear 119; the transmission shaft 13 is connected with the driving bevel gear assembly 12 through a flange screw connection structure, and a bevel gear of the driving bevel gear assembly 12 is meshed with a bevel gear of the second differential assembly 15; the spur gear of the first differential assembly 14 meshes with the spur gear 108. Details regarding the assembly of the drive axle assembly 10 are not provided herein.
In summary, by moving the sliding sleeve gear 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, the planetary gear train is switched to the reduction gear to improve the torque capacity, and when the vehicle is lightly loaded or unloaded, the planetary gear train is switched to the direct gear to reduce the energy consumption.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A reducer assembly comprising a planetary gear train, wherein the reducer assembly further comprises:
a sun gear;
the planet carrier is sleeved on the sun gear;
the first motor is arranged at one end of the sun gear along the axial direction of the sun gear;
the fixed gear sleeve is sleeved on the sun gear and is positioned between the planet carrier and the first motor;
the sliding gear sleeve is sleeved on the planet carrier and can move back and forth along the axial direction of the sliding gear sleeve;
the sliding gear sleeve is provided with a first gear and a second gear;
when the sliding gear sleeve is in a first gear, the two internal splines are respectively meshed with the planet carrier and the fixed gear sleeve through the splines, so that the planetary gear train is in a direct gear; when the sliding gear sleeve is in a second gear, the two internal splines are respectively meshed with the planet carrier and the motor through the splines, so that the planetary gear train is in a speed reduction gear.
2. The retarder assembly of claim 1, further comprising a shift fork;
the outer circumferential surface of the sliding gear sleeve is provided with an annular mounting groove; the shifting fork is arranged in the annular mounting groove and used for shifting the sliding gear sleeve so as to enable the sliding gear sleeve to move in a reciprocating mode along the axial direction of the sliding gear sleeve.
3. The speed 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 stator sleeved outside the first motor rotor;
the first motor rotor is rotationally connected with the first motor stator around the axis of the sun gear, and the first motor rotor is meshed with the sun gear through a spline;
when the sliding gear sleeve is in a second gear, the outer peripheral side of the first motor stator is connected with one of the internal splines through a spline.
4. The reducer assembly according to claim 3, wherein a first cavity and a second cavity are arranged in the first motor stator in sequence along the axial direction of the sun gear, the first cavity is used for accommodating the first motor rotor, and the second cavity is communicated with one side of the first cavity, which is close to the sun gear;
the speed reducer assembly further comprises a first bearing arranged in the second cavity;
one end of the sun gear penetrates through the first bearing and extends into the first cavity to be connected with the first motor rotor, and the sun gear is rotatably connected with the first motor stator through the first bearing.
5. The retarder assembly of claim 3, further comprising two sets of first needle bearings;
the outer circumferential surfaces of the two opposite ends of the fixed gear sleeve along the axial direction are respectively provided with an installation step; two groups of first needle bearings are respectively arranged on the two mounting steps, and the fixed gear sleeve is rotationally connected with the first motor stator and the planet carrier around the axis of the sun gear by means of the two first needle bearings.
6. The retarder assembly of claim 3, further comprising a second electric machine;
the second motor comprises a second motor rotor and a second motor stator, wherein the second motor rotor is arranged on one side of the sun gear, which is far away from the first motor, and the second motor stator is sleeved outside the second motor rotor;
the second motor rotor is rotatably connected with the second motor stator around the axis of the sun gear, and the second motor rotor is meshed with the sun gear through a spline;
the first motor and the second motor are used for providing driving force for the speed reducer assembly.
7. The reducer assembly according to claim 6, wherein a third cavity and a fourth cavity 1712 are arranged in the second motor stator in sequence along the axial direction of the sun gear, the third cavity is used for accommodating the second motor rotor, and the fourth cavity 1712 is communicated with one side of the third cavity close to the sun gear;
the reducer assembly further comprises a second bearing disposed in the fourth cavity 1712;
one end of the sun gear, which is far away from the first motor, penetrates through the second bearing and extends into the third cavity so as to be connected with the second motor rotor, and the sun gear is rotationally connected with the second motor stator by virtue of the second bearing.
8. The retarder assembly of claim 6, further comprising a second needle bearing;
the second needle bearing is arranged between the planet carrier and the second motor stator, and the planet carrier is rotationally connected with the second motor stator around the axis of the sun gear by means of the second needle bearing.
9. The retarder assembly of claim 1, further comprising a third bearing;
the third bearing is sleeved on the sun wheel;
the planet carrier is arranged on the sun wheel through the third bearing and is connected with the sun wheel in a rotating mode around the axis of the sun wheel.
10. A drive axle assembly, characterized in that it comprises a retarder assembly according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210957243.9A CN115234641A (en) | 2022-08-10 | 2022-08-10 | Speed reducer assembly and drive axle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210957243.9A CN115234641A (en) | 2022-08-10 | 2022-08-10 | Speed reducer assembly and drive axle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115234641A true CN115234641A (en) | 2022-10-25 |
Family
ID=83679709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210957243.9A Pending CN115234641A (en) | 2022-08-10 | 2022-08-10 | Speed reducer assembly and drive axle assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115234641A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451079A (en) * | 2022-09-02 | 2022-12-09 | 一汽解放汽车有限公司 | Speed reducer and transmission assembly with same |
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| CN115451079A (en) * | 2022-09-02 | 2022-12-09 | 一汽解放汽车有限公司 | Speed reducer and transmission assembly with same |
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