Electric drive axle assembly and vehicle

Abstract

The utility model discloses an electric drive axle assembly and a vehicle. The electric drive axle assembly comprises a differential mechanism, a first transmission shaft, a first gear shifting device, a first half shaft and a second half shaft. The first end of the first transmission shaft is connected with a main reduction driven gear of the differential; the first gear shifting device comprises a first gear shifting sliding sleeve, a first spline and a second spline, the first gear shifting sliding sleeve can move to the position where the first spline and the second spline are connected, and the first spline is arranged at the second end of the first transmission shaft; the first half shaft is connected with the first side of the differential mechanism, the first transmission shaft and the first half shaft are coaxial, and the second spline is arranged on the first half shaft. The second half shaft is connected with the second side of the differential; when the first gear shifting sliding sleeve is connected with the first spline and the second spline, the differential mechanism is locked, and the first half shaft and the second half shaft can keep the same rotating state. The spline is additionally arranged in the gear shifting device to serve as a starting part of the differential lock, an executing mechanism is simplified, and the size and the weight of a gearbox are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field generally, more specifically, it relates to a kind of electric drive axle assembly and vehicle. BACKGROUND

[0002] In prior art, new energy heavy truck electric drive axle system, it is mostly multiple-gear electric drive axle, differential lock actuator is independently arranged, and is controlled by pneumatic control. Gear shifting actuator is independently arranged, and multiple control modes such as electric control, pneumatic control and hydraulic control can be realized.

[0003] In order to meet the use demand of heavy truck, electric drive axle generally needs to apply multiple gears, which requires the arrangement of gear shifting actuator. At the same time, in order to realize vehicle escape, differential lock is also arranged. Generally, drive axle gear shifting actuator and differential lock actuator are independently arranged, and the actuator is not universal, which leads to low integration of actuator in electric drive axle, complex structure, large size, and affects the vehicle arrangement of electric drive axle.

[0004] Therefore, it is necessary to provide an electric drive axle assembly and vehicle to at least partially solve the above problems. SUMMARY

[0005] A series of simplified concepts are introduced in the summary part, which will be further described in detail in the specific embodiment part. The summary part of the utility model does not mean to try to limit the key features and necessary technical features of the claimed technical solution, and does not mean to try to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, the first aspect of the utility model provides an electric drive axle assembly, comprising:

[0007] Differential, the differential includes main reduction driven gear;

[0008] First transmission shaft, the first end of the first transmission shaft is connected with the main reduction driven gear of the differential;

[0009] First gear shifting device, the first gear shifting device includes first gear shifting sleeve and three groups of more than spline, two groups of spline are first spline and second spline, the first gear shifting sleeve can move in the first gear shifting device, and move to the position connected with the first spline and the second spline, the first spline is arranged on the second end of the first transmission shaft;

[0010] First half shaft, the first end of the first half shaft is connected with the first side of the differential, the first transmission shaft is coaxial with the first half shaft, and the second spline is arranged on the first half shaft;

[0011] a second half shaft, a first end of the second half shaft is connected to a second side of the differential;

[0012] wherein, when the first shift sleeve connects the first spline and the second spline, the differential is locked, and the first half shaft and the second half shaft can keep the same rotating state.

[0013] Optionally, the electric drive axle assembly further comprises:

[0014] a second transmission shaft coaxial with the first half shaft, the first shift device further comprises a third spline, the second spline and the third spline are respectively located on the left and right sides of the first spline, the third spline is arranged at a second end of the second transmission shaft, and the first shift sleeve can be moved to a position connecting the first spline and the third spline.

[0015] Optionally, the first transmission shaft and the second transmission shaft are both hollow shafts, the first transmission shaft is sleeved on the first half shaft, and the second transmission shaft is sleeved on the first transmission shaft.

[0016] Optionally, the electric drive axle assembly further comprises:

[0017] a motor;

[0018] a third transmission shaft parallel to the first half shaft, a first end of the third transmission shaft is connected to the motor;

[0019] a first gear arranged on the third transmission shaft.

[0020] Optionally, the electric drive axle assembly further comprises:

[0021] a fourth transmission shaft parallel to the third transmission shaft;

[0022] a second gear arranged on the fourth transmission shaft, the second gear is in meshing transmission with the first gear, the first gear and the second gear form a first gear pair, and a transmission ratio of the first gear pair is i1.

[0023] Optionally, the electric drive axle assembly further comprises:

[0024] a third gear arranged on the fourth transmission shaft;

[0025] a fourth gear arranged at a first end of the second transmission shaft, the fourth gear is in meshing transmission with the third gear, the third gear and the fourth gear form a second gear pair, and a transmission ratio of the second gear pair is i2.

[0026] Optionally, the electric drive axle assembly further comprises:

[0027] A fifth gear is arranged on the second transmission shaft and is arranged close to the first end of the second transmission shaft;

[0028] A seventh gear is arranged on the second transmission shaft and is arranged close to the second end of the second transmission shaft;

[0029] A fifth transmission shaft is arranged in parallel with the second transmission shaft;

[0030] A sixth gear is sleeved on the fifth transmission shaft and can rotate relative to the fifth transmission shaft, the sixth gear is in meshing transmission with the fifth gear, and the fifth gear and the sixth gear form a third gear pair, and a transmission ratio of the third gear pair is i3;

[0031] An eighth gear is sleeved on the fifth transmission shaft and can rotate relative to the fifth transmission shaft, the eighth gear is in meshing transmission with the seventh gear, the seventh gear and the eighth gear form a fourth gear pair, and a transmission ratio of the fourth gear pair is i4.

[0032] Optionally, the electric drive axle assembly further comprises:

[0033] The second shifting device comprises a second shifting sleeve and three groups of splines, wherein the three groups of splines are a fourth spline, a fifth spline and a sixth spline, the fifth spline and the sixth spline are respectively located on the left and right sides of the fourth spline, the second shifting sleeve can move in the second shifting device and move to a position connecting the fourth spline and the fifth spline or move to a position connecting the fourth spline and the sixth spline;

[0034] The fourth spline is arranged on the fifth transmission shaft, the fifth spline is connected with and coaxially arranged with the eighth gear, and the sixth spline is connected with and coaxially arranged with the sixth gear.

[0035] Optionally, when the first shifting sleeve moves to the position connecting the first spline and the second spline, the second shifting sleeve can move to the position connecting the fourth spline and the fifth spline or move to the position connecting the fourth spline and the sixth spline.

[0036] Optionally, the electric drive axle assembly further comprises:

[0037] The ninth gear is arranged on the fifth transmission shaft, is engaged with the main reduction follower gear for transmission, and forms a fifth gear pair with the main reduction follower gear. The transmission ratio of the fifth gear pair is i5.

[0038] Alternatively, the second shift sleeve moves to a position connecting the fourth spline and the fifth spline, the driving torque transmission path is: motor, third transmission shaft, first gear, second gear, fourth transmission shaft, third gear, fourth gear, second transmission shaft, seventh gear, eighth gear, second shift device, fifth transmission shaft, ninth gear, differential, first half shaft, second half shaft, the transmission ratio is i1*i2*i4*i5, and the energy recovery path is opposite to the driving torque transmission path.

[0039] Alternatively, the second shift sleeve moves to a position connecting the fourth spline and the sixth spline, the driving torque transmission path is: motor, third transmission shaft, first gear, second gear, fourth transmission shaft, third gear, fourth gear, second transmission shaft, fifth gear, sixth gear, second shift device, fifth transmission shaft, ninth gear, differential, first half shaft, second half shaft, the transmission ratio is i1*i2*i3*i5, and the energy recovery path is opposite to the driving torque transmission path.

[0040] Alternatively, the first shift sleeve moves to a position connecting the first spline and the third spline, the driving torque transmission path is: motor, third transmission shaft, first gear, second gear, fourth transmission shaft, third gear, fourth gear, second transmission shaft, first shift device, first transmission shaft, differential, first half shaft, second half shaft, the transmission ratio is i1*i2, and the energy recovery path is opposite to the driving torque transmission path.

[0041] Alternatively, the electric drive axle assembly further comprises:

[0042] The first shift actuator is connected to the first shift sleeve and can drive the first shift sleeve to move. The first shift actuator is any one of electric control, pneumatic control or hydraulic control.

[0043] The second shift actuator is connected to the second shift sleeve and can drive the second shift sleeve to move. The second shift actuator is any one of electric control, pneumatic control or hydraulic control.

[0044] Alternatively, the electric drive axle assembly further comprises:

[0045] The first axle housing is internally provided with the first half shaft, and the first shift sleeve, the first spline, the second spline and the third spline are arranged in the first axle housing.

[0046] A second axle housing, the second half axle is arranged inside the second axle housing, and the part of the differential gear except the main reduction driven gear is arranged inside the second axle housing.

[0047] The second aspect of the utility model provides a vehicle, including the electric drive axle assembly of any one of the above technical solutions.

[0048] According to the electric drive axle assembly and vehicle, the electric drive axle assembly adds the spline as the starting component of the differential lock in the gear shifting device, the same execution mechanism can be used for executing the gear shifting action and also can be used for executing the differential lock action, thereby simplifying the execution mechanism, improving the integration, reducing the volume and weight of the gearbox, facilitating the whole vehicle arrangement of the electric drive axle, and simultaneously enabling the differential lock action to select multiple power sources like the gear shifting device, and the execution action is more rapid and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0049] The following drawings of the utility model embodiment are used as a part of the utility model for understanding the utility model herein. The drawings show the embodiment of the utility model and its description, which are used to explain the principle of the utility model. In the drawings,

[0050] Figure 1 It is a structure schematic view of the electric drive axle assembly according to a preferred embodiment of the utility model, the first gear shifting sliding sleeve is located at the third position, the second gear shifting sliding sleeve is located at the third position, and the electric drive axle assembly is changed into the neutral state;

[0051] Figure 2 It is a structure schematic view of the electric drive axle assembly according to a preferred embodiment of the utility model, the first gear shifting sliding sleeve is located at the first position, the second gear shifting sliding sleeve is located at the first position, and the electric drive axle assembly is changed into the first gear state and the differential lock state;

[0052] Figure 3 It is a structure schematic view of the electric drive axle assembly according to a preferred embodiment of the utility model, the first gear shifting sliding sleeve is located at the first position, the second gear shifting sliding sleeve is located at the second position, and the electric drive axle assembly is changed into the second gear state and the differential lock state;

[0053] Figure 4 It is a structure schematic view of the electric drive axle assembly according to a preferred embodiment of the utility model, the first gear shifting sliding sleeve is located at the second position, the second gear shifting sliding sleeve is located at the third position, and the electric drive axle assembly is changed into the third gear state;

[0054] Figure 5For the structure schematic diagram of the electric drive axle assembly according to a preferred embodiment of the utility model, the first gear shift sliding sleeve is located at the third position, the second gear shift sliding sleeve is located at the first position, and the electric drive axle assembly is changed into the first gear state;

[0055] Figure 6 For the structure schematic diagram of the electric drive axle assembly according to a preferred embodiment of the utility model, the first gear shift sliding sleeve is located at the third position, the second gear shift sliding sleeve is located at the first position, and the electric drive axle assembly is changed into the first gear state.

[0056] Mark explanation:

[0057] 100: electric drive axle assembly 101: motor

[0058] 102: first gear 103: second gear

[0059] 104: fourth gear 105: fifth gear

[0060] 106: first gear shift sliding sleeve 107: first half shaft

[0061] 108: second spline 109: seventh gear

[0062] 110: second gear shift sliding sleeve 111: eighth gear

[0063] 112: sixth gear 113: fifth transmission shaft

[0064] 114: main reduction driven gear 115: second half shaft

[0065] 116: differential 117: third gear

[0066] 118: third transmission shaft 119: fourth transmission shaft

[0067] 120: second transmission shaft 121: first transmission shaft

[0068] 122: ninth gear 123: fourth spline

[0069] 124: fifth spline 125: sixth spline

[0070] 126: first spline 127: third spline

[0071] 201: first gear shift device 202: second gear shift device

[0072] 203: first gear shift actuating mechanism 204: second gear shift actuating mechanism

[0073] 301: first axle housing 302: second axle housing

[0074] 303: gearbox housing DETAILED DESCRIPTION

[0075] In the following description, numerous specific details are set forth to provide a more thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without one or more of these details. In other instances, well-known features have not been described in order to avoid obscuring the present application.

[0076] For a thorough understanding of the present application, reference is made to the following detailed description. It is apparent that the application can be practiced without one or more of the specific details set forth herein. Certain characteristics described herein have been chosen for the purpose of illustration. Accordingly, the disclosure is not intended to be limited to the details of construction, arrangement, or combination of features as described herein.

[0077] The ordinal numbers such as "first" and "second" cited in the present application are merely identifiers and do not have any other meaning, such as a specific order. Also, for example, the term "first component" does not imply the existence of a "second component", and the term "second component" does not imply the existence of a "first component".

[0078] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer", and similar terms used herein are intended for illustrative purposes only and are not limiting.

[0079] The present application discloses an electric drive axle assembly and a vehicle.

[0080] Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings.

[0081] As Figure 1 , Figure 2 , Figure 3 shown, in a preferred embodiment, an electric drive axle assembly 100 includes a differential 116, a first propeller shaft 121, a first shift device 201, a first half shaft 107, and a second half shaft 115.

[0082] The differential 116 includes a main reduction driven gear 114, which can be a spur cylindrical gear. The specific structure of the differential 116 can refer to the prior art, for example, generally includes a planetary carrier, two planetary gears, two half shaft gears, etc. The planetary carrier is in a fixed connection relationship with the main reduction driven gear 114. The two planetary gears are arranged on the planetary carrier. The two half shaft gears are fixedly connected with the first half shaft 107 and the second half shaft 115 respectively and are in meshing transmission with the two planetary gears respectively. The rotation of the main reduction driven gear 114 can drive the rotation of the planetary carrier, the rotation of the planetary carrier can drive the rotation of the two planetary gears, the rotation of the two planetary gears can drive the rotation of the two half shaft gears, and the rotation of the two half shaft gears can drive the rotation of the first half shaft 107 and the second half shaft 115. When the vehicle is driving on a curve or on uneven road surface, the differential 116 can enable the first half shaft 107 and the second half shaft 115 to rotate at different speeds;

[0083] The first end of the first transmission shaft 121 is connected with the main reduction driven gear 114 of the differential 116, and can be fixedly connected through a key;

[0084] The first shift device 201 includes a first shift sleeve 106 and three or more than three splines, two of which are a first spline 126 and a second spline 108. The second spline 108 is used as a starting component of the differential lock, and the other splines can be used for shifting. The first shift sleeve 106 can move in the first shift device 201 and move to a position (first position) connecting the first spline 126 and the second spline 108. The first spline 126 is arranged on the second end of the first transmission shaft 121. The first spline 126 and the first transmission shaft 121 can be fixedly connected through a key;

[0085] As shown in Figure 1 The first shift device 201 further includes a first shift actuator 203 connected with the first shift sleeve 106 and capable of driving the first shift sleeve 106 to move. The first shift actuator 203 is any one of electric control, pneumatic control or hydraulic control. The first shift actuator 203 can be used to start the differential lock and also can be used to start the shifting;

[0086] The first end of the first half shaft 107 is connected with the first side of the differential 116. The differential 116 can drive the rotation of the first half shaft 107. The second end of the first half shaft 107 is used to connect the first wheel. The first transmission shaft 121 is coaxial with the first half shaft 107. The second spline 108 is arranged on the first half shaft 107. The second spline 108 and the first half shaft 107 can be fixedly connected through a key;

[0087] The first end of the second half shaft 115 is connected with the second side of the differential 116. The differential 116 can drive the rotation of the second half shaft 115. The second end of the second half shaft 115 is used to connect the second wheel;

[0088] When the first shift sleeve 106 connects the first spline 126 and the second spline 108, the differential 116 is locked, and the first half shaft 107 and the second half shaft 115 can keep the same rotating state.

[0089] When the differential lock is started, the electric drive axle assembly 100 can also be shifted to the first gear state or the second gear state, as shown in Figure 2 As shown in FIG. 4, by adjusting the second shift device 202, the electric drive axle assembly 100 is shifted to the first gear state. Figure 3 As shown in FIG. 5, by adjusting the second shift device 202, the electric drive axle assembly 100 is shifted to the second gear state. Of course, by adjusting the second shift device 202, the electric drive axle assembly 100 can also be shifted to the neutral state.

[0090] Since the first end of the first transmission shaft 121 is fixedly connected to the main reduction driven gear 114 of the differential 116, when the first shift sleeve 106 connects the first spline 126 and the second spline 108, the first half shaft 107 also forms a relatively fixed connection with the main reduction driven gear 114 of the differential 116. Due to the internal structure of the differential 116, at this time, the planet carrier, the two planet gears, the two half shaft gears, and the main reduction driven gear 114 all form a relatively fixed relationship, and the relative rotation between each component is not allowed but the overall rotation is allowed. The differential 116 is locked, and the first half shaft 107 and the second half shaft 115 rotate as a whole with the differential 116, and the rotation speeds of the first half shaft 107 and the second half shaft 115 are the same, so they can rotate synchronously or stop rotating synchronously, and there is no differential rotation.

[0091] By setting the differential lock, the passing ability of the vehicle on poor road conditions can be improved. For example, when the vehicle is driving on a muddy and bumpy road, if the differential 116 is not locked, the wheels will slip and lose traction due to the poor road conditions, one of the first half shaft 107 and the second half shaft 115 will idle, and the vehicle cannot drive out of the muddy and bumpy road. At this time, the driver can start the differential lock to quickly lock the differential 116, so that the first half shaft 107 and the second half shaft 115 become rigidly connected, and most or even all of the torque can be transmitted to the wheels that do not slip, fully utilizing the traction of the wheels to generate enough traction to help the vehicle escape.

[0092] The electric drive axle assembly 100 in this embodiment can use the spline in the shift device as the starting component of the differential lock, so that the same actuator can be used to perform the shift action and the differential lock action, thereby simplifying the actuator, improving the integration, reducing the size and weight of the transmission, and facilitating the layout of the electric drive axle.

[0093] As shown in Figure 1 , Figure 4As shown, in one embodiment, the electric drive axle assembly 100 further comprises a second transmission shaft 120;

[0094] The second transmission shaft 120 is coaxial with the first half shaft 107, and the first gear shifting device 201 further comprises a third spline 127, the second spline 108 and the third spline 127 are respectively located on the left and right sides of the first spline 126, and the third spline 127 is arranged at the second end of the second transmission shaft 120. The first gear shifting sleeve 106 can be moved to a position (second position) connecting the first spline 126 and the third spline 127, at which time the electric drive axle assembly 100 is shifted to a third gear state.

[0095] The third spline 127 can be fixedly connected with the second transmission shaft 120 through a key. When the first gear shifting sleeve 106 moves to the position connecting the first spline 126 and the third spline 127, the electric drive axle assembly 100 is shifted to the third gear state, at which time the differential lock cannot be started at the same time. In the third gear state, as shown, Figure 4 As shown, the driving torque transmission path is: motor 101, third transmission shaft 118, first gear 102, second gear 103, fourth transmission shaft 119, third gear 117, fourth gear 104, second transmission shaft 120, first gear shifting device 201, first transmission shaft 121, differential 116, first half shaft 107, second half shaft 115, which is equivalent to only two gear pairs (first gear 102 and second gear 103, third gear 117 and fourth gear 104) transmitting power, the power transmission path is short, and the transmission efficiency is high.

[0096] As shown, Figure 1 In one embodiment, the first transmission shaft 121 and the second transmission shaft 120 are hollow shafts, the first transmission shaft 121 is sleeved on the first half shaft 107, and the second transmission shaft 120 is sleeved on the first transmission shaft 121. By arranging the hollow shaft structure, the first half shaft 107, the first transmission shaft 121 and the second transmission shaft 120 can be installed in a smaller space and maintain the connection relationship with the first gear shifting device 201. Correspondingly, the first spline 126 and the main reduction driven gear 114 are also sleeved on the first half shaft 107, and the third spline 127 is also sleeved on the first transmission shaft 121.

[0097] A bearing can be arranged between the first transmission shaft 121 and the first half shaft 107 for support, and a bearing can be arranged between the second transmission shaft 120 and the first transmission shaft 121 for support, maintaining the coaxial relationship of the three.

[0098] As shown, Figure 1 In one embodiment, the electric drive axle assembly 100 further comprises a motor 101, a third transmission shaft 118 and a first gear 102;

[0099] The motor 101 is a dual-purpose motor capable of driving the vehicle to travel and recovering the kinetic energy of the vehicle, and changes different functions according to the travel state of the vehicle.

[0100] The third transmission shaft 118 is arranged in parallel with the first half shaft 107, and a first end of the third transmission shaft 118 is connected to the motor 101; the first end of the third transmission shaft 118 and the rotor shaft of the motor 101 can be connected through a shaft coupling, and the third transmission shaft 118 and the rotor shaft of the motor 101 can also be an integrated structure; a second end of the third transmission shaft 118 can be installed on the transmission case 303, and a bearing is arranged at the installation position to support the third transmission shaft 118.

[0101] The first gear 102 is arranged on the third transmission shaft 118 and can be fixedly connected through a key; the first gear 102 can be a spur cylindrical gear.

[0102] As shown in the drawings, in one embodiment, the electric drive axle assembly 100 further comprises a fourth transmission shaft 119 and a second gear 103. Figure 1

[0103] The fourth transmission shaft 119 is arranged in parallel with the third transmission shaft 118, and both ends of the fourth transmission shaft 119 can be installed on the transmission case 303, and a bearing is arranged at the installation position to support the fourth transmission shaft 119.

[0104] The second gear 103 is arranged on the fourth transmission shaft 119 and can be fixedly connected through a key; the second gear 103 can be a spur cylindrical gear, the second gear 103 is in meshing transmission with the first gear 102, the first gear 102 and the second gear 103 form a first gear pair, and the transmission ratio of the first gear pair is i1.

[0105] As shown in the drawings, in one embodiment, the electric drive axle assembly 100 further comprises a third gear 117 and a fourth gear 104. Figure 1

[0106] The third gear 117 is arranged on the fourth transmission shaft 119 and can be fixedly connected through a key; the third gear 117 can be a spur cylindrical gear.

[0107] The fourth gear 104 is arranged on a first end of the second transmission shaft 120 and is fixedly connected through a key; the fourth gear 104 can be a spur cylindrical gear, the fourth gear 104 is in meshing transmission with the third gear 117, the third gear 117 and the fourth gear 104 form a second gear pair, the transmission ratio of the second gear pair is i2, and i2 is not equal to i1.

[0108] As shown in the drawings, in one embodiment, the electric drive axle assembly 100 further comprises a third gear 117 and a fourth gear 104. Figure 1 ​​As shown in the figure, in one embodiment, the electric drive axle assembly 100 further comprises: a fifth gear 105, a seventh gear 109, a fifth transmission shaft 113, a sixth gear 112 and an eighth gear 111;

[0109] The fifth gear 105 is arranged on the second transmission shaft 120 and close to the first end of the second transmission shaft 120, and can be fixedly connected by a key. The fifth gear 105 can be a straight cylindrical gear.

[0110] The seventh gear 109 is arranged on the second transmission shaft 120 and close to the second end of the second transmission shaft 120, and can be fixedly connected by a key. The seventh gear 109 can be a straight cylindrical gear.

[0111] The fifth transmission shaft 113 is arranged in parallel with the second transmission shaft 120. Both ends of the fifth transmission shaft 113 can be mounted on the transmission housing 303. Bearings are arranged at the mounting positions to support the fifth transmission shaft 113.

[0112] The sixth gear 112 is sleeved on the fifth transmission shaft 113 and can rotate relative to the fifth transmission shaft 113. Bearings can be arranged between the sixth gear 112 and the fifth transmission shaft 113 to support them. The sixth gear 112 can be a straight cylindrical gear. The sixth gear 112 is in meshing transmission with the fifth gear 105. The fifth gear 105 and the sixth gear 112 form a third gear pair. The transmission ratio of the third gear pair is i3.

[0113] The eighth gear 111 is sleeved on the fifth transmission shaft 113 and can rotate relative to the fifth transmission shaft 113. Bearings can be arranged between the eighth gear 111 and the fifth transmission shaft 113 to support them. The eighth gear 111 can be a straight cylindrical gear. The eighth gear 111 is in meshing transmission with the seventh gear 109. The seventh gear 109 and the eighth gear 111 form a fourth gear pair. The transmission ratio of the fourth gear pair is i4. i1, i2, i3 and i4 are all different.

[0114] As shown in the figure, Figure 1 , Figure 2 , Figure 3 In one embodiment, the electric drive axle assembly 100 further comprises: a second gear shifting device 202.

[0115] The second gear shifting device 202 comprises a second gear shifting sleeve 110 and three or more sets of splines. The three sets of splines are a fourth spline 123, a fifth spline 124 and a sixth spline 125. The fifth spline 124 and the sixth spline 125 are respectively located on the left and right sides of the fourth spline 123. The second gear shifting sleeve 110 can move in the second gear shifting device 202 and move to a position (first position) connecting the fourth spline 123 and the fifth spline 124, or move to a position (second position) connecting the fourth spline 123 and the sixth spline 125.

[0116] The fourth spline 123 is arranged on the fifth transmission shaft 113 and can be fixedly connected by a key. The fifth spline 124 is connected to the eighth gear 111 and arranged coaxially with the eighth gear 111. The sixth spline 125 is connected to the sixth gear 112 and arranged coaxially with the sixth gear 112. The fifth spline 124 and the eighth gear 111 can be integrally formed or separately formed and fixedly connected by welding. The sixth spline 125 and the sixth gear 112 can be integrally formed or separately formed and fixedly connected by welding.

[0117] As shown in Figure 1 , the second gear shifting device 202 further includes a second gear shifting actuator 204 connected to the second gear shifting sleeve 110 and capable of driving the second gear shifting sleeve 110 to move. The second gear shifting actuator 204 is any one of electric control, pneumatic control or hydraulic control.

[0118] As shown in Figure 2 , in one embodiment, when the first gear shifting sleeve 106 moves to a position connecting the first spline 126 and the second spline 108, at this time, the differential 116 is locked, the second gear shifting sleeve 110 can move to a position connecting the fourth spline 123 and the fifth spline 124, and the electric drive axle assembly 100 is shifted to a first gear state, or as shown in Figure 3 , the second gear shifting sleeve 110 can move to a position connecting the fourth spline 123 and the sixth spline 125, and the electric drive axle assembly 100 is shifted to a second gear state.

[0119] As shown in Figure 1 , Figure 2 , Figure 3 , in one embodiment, the electric drive axle assembly 100 further includes a ninth gear 122.

[0120] The ninth gear 122 is arranged on the fifth transmission shaft 113 and can be fixedly connected by a key. The ninth gear 122 can be a straight-tooth cylindrical gear. The ninth gear 122 is in meshing transmission with the main reduction driven gear 114, and the ninth gear 122 and the main reduction driven gear 114 form a fifth gear pair. The transmission ratio of the fifth gear pair is i5. i5, i4, i3, i2 and i1 are all not equal.

[0121] As shown in Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , in one embodiment, the electric drive axle assembly 100 can realize the following multiple driving modes and be shifted to different gear positions.

[0122] First driving mode:

[0123] AsFigure 2 As shown, in one embodiment, the second shift sleeve 110 moves to the position connecting the fourth spline 123 and the fifth spline 124 (first position, electric drive axle assembly 100 changes to first gear state), while the first shift sleeve 106 can move to the position connecting the first spline 126 and the second spline 108 (first position, differential 116 is locked). The drive torque transmission path is: motor 101, third drive shaft 118, first gear 102, second gear 103, fourth drive shaft 119, third gear 117, fourth gear 104, second drive shaft 120, seventh gear 109, eighth gear 111, second shift device 202, fifth drive shaft 113, ninth gear 122, differential 116, first half shaft 107, second half shaft 115, with a transmission ratio of i1*i2*i4*i5. The energy recovery path is opposite to the drive torque transmission path.

[0124] Second drive mode:

[0125] like Figure 3 As shown, in one embodiment, the second shift sleeve 110 moves to the position connecting the fourth spline 123 and the sixth spline 125 (second position, electric drive axle assembly 100 changes to second gear state), while the first shift sleeve 106 moves to the position connecting the first spline 126 and the second spline 108 (first position, differential 116 is locked). The drive torque transmission path is: motor 101, third drive shaft 118, first gear 102, second gear 103, fourth drive shaft 119, third gear 117, fourth gear 104, second drive shaft 120, fifth gear 105, sixth gear 112, second shift device 202, fifth drive shaft 113, ninth gear 122, differential 116, first half shaft 107, second half shaft 115, with a transmission ratio of i1*i2*i3*i5. The energy recovery path is opposite to the drive torque transmission path.

[0126] Third drive mode:

[0127] like Figure 4 As shown, in one embodiment, the first shift sleeve 106 moves to the position connecting the first spline 126 and the third spline 127 (second position, electric drive bridge assembly 100 changes to the third gear state), while the second shift sleeve 110 must move to the position connecting only the fourth spline 123 (third position). The driving torque transmission path is: motor 101, third drive shaft 118, first gear 102, second gear 103, fourth drive shaft 119, third gear 117, fourth gear 104, second drive shaft 120, first shift device 201, first drive shaft 121, differential 116, first half shaft 107, second half shaft 115, with a transmission ratio of i1*i2. The energy recovery path is opposite to the driving torque transmission path.

[0128] Fourth drive mode:

[0129] like Figure 5 As shown, in one embodiment, the second shift sleeve 110 moves to the position connecting the fourth spline 123 and the fifth spline 124 (first position, electric drive bridge assembly 100 changes to first gear state), while the first shift sleeve 106 moves to the position connecting only the first spline 126 (third position). The driving torque transmission path is: motor 101, third drive shaft 118, first gear 102, second gear 103, fourth drive shaft 119, third gear 117, fourth gear 104, second drive shaft 120, seventh gear 109, eighth gear 111, second shift device 202, fifth drive shaft 113, ninth gear 122, differential 116, first half shaft 107, second half shaft 115, with a transmission ratio of i1*i2*i4*i5. The energy recovery path is opposite to the driving torque transmission path.

[0130] Fifth drive mode:

[0131] like Figure 6 As shown, in one embodiment, the second shift sleeve 110 moves to the position connecting the fourth spline 123 and the sixth spline 125 (second position, electric drive bridge assembly 100 changes to the second gear state), while the first shift sleeve 106 moves to the position connecting only the first spline 126 (third position). The driving torque transmission path is: motor 101, third drive shaft 118, first gear 102, second gear 103, fourth drive shaft 119, third gear 117, fourth gear 104, second drive shaft 120, fifth gear 105, sixth gear 112, second shift device 202, fifth drive shaft 113, ninth gear 122, differential 116, first half shaft 107, second half shaft 115, with a transmission ratio of i1*i2*i3*i5. The energy recovery path is opposite to the driving torque transmission path.

[0132] like Figure 1 As shown, in one embodiment, the electric drive bridge assembly 100 further includes: a first bridge housing 301 and a second bridge housing 302;

[0133] The first end of the first axle housing 301 is connected to the gearbox housing 303. The first half-shaft 107 passes through the inside of the first axle housing 301. The first shift sleeve 106, the first spline 126, the second spline 108 and the third spline 127 are disposed inside the first axle housing 301.

[0134] The first end of the second axle housing 302 is connected to the transmission housing 303, the second half axle 115 is arranged inside the second axle housing 302, and the part of the differential 116 except the main reduction driven gear 114 is arranged inside the second axle housing 302, and the main reduction driven gear 114 is arranged inside the transmission housing 303.

[0135] Through the arrangement, the effective space of the axle housing can be fully utilized, the above-mentioned components are prevented from being arranged inside the transmission housing 303, and the volume and weight of the transmission are reduced.

[0136] The embodiment of the utility model also provides a vehicle, including any one of the electric drive axle assembly 100 in above-embodiment.

[0137] In one embodiment, the vehicle is a new energy heavy truck. The electric drive axle assembly 100 can drive the vehicle to travel on one hand, and can also recover the kinetic energy of the vehicle on the other hand. In the process of deceleration and parking or long downhill, the electric drive axle assembly 100 can recover the kinetic energy of the vehicle, which has the characteristics of energy saving and environmental protection.

[0138] The electric drive axle assembly and the vehicle have the following characteristics:

[0139] The electric drive axle assembly increases the spline as the starting component of the differential lock in the gear shifting device. The same execution mechanism can be used to perform the gear shifting action and also can be used to perform the differential locking action, thereby simplifying the execution mechanism, improving the integration, reducing the volume and weight of the transmission, facilitating the overall arrangement of the electric drive axle, and enabling the differential locking action to select multiple power sources like the gear shifting device, and the execution action is more rapid and reliable.

[0140] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this utility model. The features described in one embodiment can be applied to another embodiment, either individually or in combination, unless the features are not applicable or are otherwise stated.

[0141] The utility model has been described by the above-embodiment, but it should be understood that the above-embodiment is only for the purpose of example and illustration, and is not intended to limit the utility model to the described embodiment range. In addition, those skilled in the art can understand that the utility model is not limited to the above-embodiment, and more kinds of variations and modifications can be made according to the teaching of the utility model, and these variations and modifications all fall within the scope of the utility model claimed.

Claims

1. An electric drive axle assembly, comprising: The differential (116) comprises a main reduction driven gear (114); The first transmission shaft (121) is connected to the main reduction driven gear (114) of the differential (116); The first shift device (201) comprises a first shift sleeve (106) and more than three groups of splines, two of which are a first spline (126) and a second spline (108), the first shift sleeve (106) can move in the first shift device (201) and move to a position connected to the first spline (126) and the second spline (108), the first spline (126) is arranged on the second end of the first transmission shaft (121); The first half shaft (107) is connected to the first side of the differential (116), the first transmission shaft (121) is coaxial with the first half shaft (107), and the second spline (108) is arranged on the first half shaft (107); The second half shaft (115) is connected to the second side of the differential (116); When the first shift sleeve (106) is connected to the first spline (126) and the second spline (108), the differential (116) is locked, and the first half shaft (107) and the second half shaft (115) can maintain the same rotating state. Further comprising:

2. The electric drive axle assembly of claim 1, wherein, The second transmission shaft (120) is coaxial with the first half shaft (107), the first shift device (201) further comprises a third spline (127), the second spline (108) and the third spline (127) are respectively located on the left and right sides of the first spline (126), the third spline (127) is arranged on the second end of the second transmission shaft (120), and the first shift sleeve (106) can move to a position connected to the first spline (126) and the third spline (127). The first transmission shaft (121) and the second transmission shaft (120) are both hollow shafts, the first transmission shaft (121) is sleeved on the first half shaft (107), and the second transmission shaft (120) is sleeved on the first transmission shaft (121).

3. The electric drive axle assembly of claim 2, wherein, Further comprising:

4. The electric drive axle assembly of claim 2, wherein, The motor (101); The third transmission shaft (118) is arranged in parallel with the first half shaft (107), and the first end of the third transmission shaft (118) is connected to the motor (101); The first gear (102) is arranged on the third transmission shaft (118). Further comprising:

5. The electric drive axle assembly of claim 4, wherein, The fourth transmission shaft (119) is arranged in parallel with the third transmission shaft (118); ​ A second gear (103) is arranged on the fourth transmission shaft (119), the second gear (103) is in meshing transmission with the first gear (102), and the first gear (102) and the second gear (103) form a first gear pair, and the transmission ratio of the first gear pair is i1.

6. The electric drive axle assembly of claim 5, wherein, Further comprising: A third gear (117) is arranged on the fourth transmission shaft (119); A fourth gear (104) is arranged on the first end of the second transmission shaft (120), the fourth gear (104) is in meshing transmission with the third gear (117), the third gear (117) and the fourth gear (104) form a second gear pair, and the transmission ratio of the second gear pair is i2.

7. The electric drive axle assembly of claim 6, wherein, Further comprising: A fifth gear (105) is arranged on the second transmission shaft (120) and close to the first end of the second transmission shaft (120); A seventh gear (109) is arranged on the second transmission shaft (120) and close to the second end of the second transmission shaft (120); A fifth transmission shaft (113) is arranged in parallel with the second transmission shaft (120); A sixth gear (112) is sleeved on the fifth transmission shaft (113) and can rotate relative to the fifth transmission shaft (113), the sixth gear (112) is in meshing transmission with the fifth gear (105), the fifth gear (105) and the sixth gear (112) form a third gear pair, and the transmission ratio of the third gear pair is i3; An eighth gear (111) is sleeved on the fifth transmission shaft (113) and can rotate relative to the fifth transmission shaft (113), the eighth gear (111) is in meshing transmission with the seventh gear (109), the seventh gear (109) and the eighth gear (111) form a fourth gear pair, and the transmission ratio of the fourth gear pair is i4.

8. The electric drive axle assembly of claim 7, wherein, Further comprising: A second shift device (202) includes a second shift sleeve (110) and three groups of splines, wherein the three groups of splines are a fourth spline (123), a fifth spline (124) and a sixth spline (125), the fifth spline (124) and the sixth spline (125) are respectively located on the left and right sides of the fourth spline (123), the second shift sleeve (110) can move in the second shift device (202) and move to a position connecting the fourth spline (123) and the fifth spline (124), or move to a position connecting the fourth spline (123) and the sixth spline (125); The fourth spline (123) is arranged on the fifth transmission shaft (113), the fifth spline (124) is connected with and coaxially arranged with the eighth gear (111), and the sixth spline (125) is connected with and coaxially arranged with the sixth gear (112).

9. The electric drive axle assembly of claim 8, wherein, When the first shift sleeve (106) moves to a position connecting the first spline (126) and the second spline (108), the second shift sleeve (110) can move to a position connecting the fourth spline (123) and the fifth spline (124), or move to a position connecting the fourth spline (123) and the sixth spline (125).

10. The electric drive axle assembly of claim 8, wherein, Further comprising: The ninth gear (122) is arranged on the fifth transmission shaft (113), the ninth gear (122) is in meshing transmission with the main reduction driven gear (114), the ninth gear (122) and the main reduction driven gear (114) form a fifth gear pair, and the transmission ratio of the fifth gear pair is i5.

11. The electric drive axle assembly of claim 10, wherein, When the second shift sleeve (110) moves to a position connecting the fourth spline (123) and the fifth spline (124), the driving torque transmission path is: motor (101), third transmission shaft (118), first gear (102), second gear (103), fourth transmission shaft (119), third gear (117), fourth gear (104), second transmission shaft (120), seventh gear (109), eighth gear (111), second shift device (202), fifth transmission shaft (113), ninth gear (122), differential (116), first half shaft (107), and second half shaft (115), the transmission ratio is i1*i2*i4*i5, and the energy recovery path is opposite to the driving torque transmission path.

12. The electric drive axle assembly of claim 10, wherein, When the second shift sleeve (110) moves to a position connecting the fourth spline (123) and the sixth spline (125), the driving torque transmission path is: motor (101), third transmission shaft (118), first gear (102), second gear (103), fourth transmission shaft (119), third gear (117), fourth gear (104), second transmission shaft (120), fifth gear (105), sixth gear (112), second shift device (202), fifth transmission shaft (113), ninth gear (122), differential (116), first half shaft (107), and second half shaft (115), the transmission ratio is i1*i2*i3*i5, and the energy recovery path is opposite to the driving torque transmission path.

13. The electric drive axle assembly of claim 10, wherein, The first shift sleeve (106) moves to a position connecting the first spline (126) and the third spline (127), the driving torque transmission path is: motor (101), third transmission shaft (118), first gear (102), second gear (103), fourth transmission shaft (119), third gear (117), fourth gear (104), second transmission shaft (120), first shift device (201), first transmission shaft (121), differential (116), first half shaft (107), second half shaft (115), the transmission ratio is i1*i2, the energy recovery path is opposite to the driving torque transmission path.

14. The electric drive axle assembly of claim 8, wherein, Further comprising: A first shift actuator (203) connected to the first shift sleeve (106) and capable of driving the first shift sleeve (106) to move, the first shift actuator (203) being any one of electric control, pneumatic control or hydraulic control; A second shift actuator (204) connected to the second shift sleeve (110) and capable of driving the second shift sleeve (110) to move, the second shift actuator (204) being any one of electric control, pneumatic control or hydraulic control.

15. The electric drive axle assembly of claim 2, wherein, Further comprising: A first axle housing (301) in which the first half shaft (107) is arranged, and the first shift sleeve (106), the first spline (126), the second spline (108) and the third spline (127) are arranged inside the first axle housing (301); A second axle housing (302) in which the second half shaft (115) is arranged, and the differential (116) except the main reduction driven gear (114) is arranged inside the second axle housing (302).

16. A vehicle characterized by comprising: The electric drive axle assembly (100) according to any one of claims 1-15. The electric drive axle assembly (100) according to any one of claims 1-15.

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