Horizontal Drive Assembly

Abstract

The present invention discloses a transverse drive assembly, which includes a power source, a transmission mechanism, and a reduction mechanism, the transmission mechanism includes a first shaft and a second shaft arranged in parallel, the first shaft is connected to the power source, the first shaft is provided with a first gear and a third gear, the second shaft is provided with a second gear and a fourth gear, the first gear is in mesh with the second gear, the third gear is in mesh with the fourth gear, the first gear is rotationally connected to the first shaft or the second gear is rotationally connected to the second shaft via a clutch, the third gear is in mesh with the first shaft or the fourth gear is rotationally connected to the second shaft via a clutch, the reduction mechanism is mounted on the second shaft and is connected to a differential. The transverse drive assembly has the advantages of a small envelope, light weight, low cost, and high efficiency.

Description

[Technical Field]

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a transverse drive assembly. [Background technology]

[0002] With the rapid development of new energy, the application of new energy power systems to large vehicles is gradually being realized, and large vehicles need to adapt to different situations, so new energy power systems not only need to meet the requirements for large torque output, but also for high vehicle speeds. To meet these needs, a currently popular approach is to use a high-torque motor and a single-stage reducer in the power system, which can meet the requirements for large torque output and high vehicle speeds, but this approach is expensive and the large size of the high-torque motor results in low power density of the power system.

[0003] In addition, existing power systems for heavy-duty pure electric vehicles often adopt a longitudinal layout. However, this layout occupies a large space underneath the vehicle, limiting the space available for battery pack placement, impacting the overall vehicle battery capacity and shortening the vehicle's cruising time. When the power system adopts a transverse layout, the prior art uses a parallel-shaft two-stage transmission (i.e., three parallel shafts) or three-stage transmission (i.e., four parallel shafts) to output at a high gear ratio to meet the overall vehicle load or climbing requirements, i.e., to meet the low-speed gear ratio i≧17. However, this has drawbacks such as multiple gear bearings, a large assembly envelope, low efficiency, and high cost. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION In response to the above problems, the present invention discloses a transverse drive assembly to eliminate or at least partially solve the above problems. [Means for solving the problem]

[0005] To achieve the above object, the present invention employs the following technical solutions.

[0006] The present invention provides a transverse drive assembly, the transverse drive assembly including a power source, a transmission mechanism, and a reduction mechanism; the speed change mechanism includes a first shaft and a second shaft provided in parallel, the first shaft is connected to the power source for power transmission, a first gear and a third gear are provided on the first shaft, a second gear and a fourth gear are provided on the second shaft, the first gear is in mesh with the second gear and the third gear is in mesh with the fourth gear, the first gear and the first shaft or the second gear and the second shaft are rotationally connected via a clutch, and the third gear and the first shaft or the fourth gear and the second shaft are in transmission for power transmission via a clutch, The reduction mechanism is mounted on the second shaft and is power-transmittingly connected to a differential.

[0007] Furthermore, the second shaft is a hollow shaft, and is fitted to the exterior of an output half shaft on one side of the differential.

[0008] Furthermore, the reduction mechanism includes a sun gear, a planet carrier, a ring gear, and a planet gear, The sun gear is externally mounted on the second shaft, the ring gear is loosely fitted coaxially on the outside of the sun gear, the planetary gears are provided between the ring gear and the sun gear and mesh with the ring gear and the sun gear respectively, the planetary gears are connected to the planetary carrier via planetary shafts, and the planetary carrier is connected to a differential housing.

[0009] Furthermore, the planetary carrier and the differential housing are connected by screws / bolts or fixedly connected by welding, or The planetary carrier and the differential housing have an integrated structure.

[0010] Furthermore, the second gear and the fourth gear are both loosely fitted on the second shaft, and a first clutch that cooperates with the second gear and the fourth gear is mounted on the second shaft.

[0011] Furthermore, the first clutch is provided between the second gear and the fourth gear, and the first clutch includes a first elastic member, a second elastic member, a first gear plate, a second gear plate, a first coil, a first armature disc, and a second armature disc; The first gear plate and the second gear plate are both mounted on the second shaft, and the first gear plate and the second gear plate are axially movable relative to the second shaft and rotate synchronously. The second gear has first end surface teeth that cooperate with the first gear plate, and the fourth gear has second end surface teeth that cooperate with the second gear plate. The first armature disk and the second armature disk are power-transmittingly connected to the first gear plate and the second gear plate, respectively. One end of the first elastic member is connected to the second shaft, and the other end is connected to the first elastic member. The second elastic member has one end connected to the second shaft and the other end connected to the second armature disk, and the second elastic member has a biasing force applied to it so that the second gear plate is in a position where it engages with the second end surface teeth. The first coil is provided between the first armature disk and the second armature disk, and can be adsorbed and connected to the first armature disk and the second armature disk, respectively.

[0012] Furthermore, the first coil includes a first partial coil and a second partial coil that are provided in parallel in the axial direction, A magnetic shield member is provided on both the end of the first partial coil close to the second armature disk and the end of the second partial coil close to the first armature disk, so that the first partial coil can attract only the first armature disk after being energized, and the second partial coil can attract only the second armature disk after being energized.

[0013] Furthermore, the second shaft is provided with a first shoulder, and both the first elastic member and the second elastic member are connected to the second shaft via the first shoulder.

[0014] Furthermore, the first gear is loosely fitted to the first shaft, the fourth gear is loosely fitted to the second shaft, a second clutch is provided between the first gear and the first shaft, and a third clutch is provided between the fourth gear and the second shaft.

[0015] Furthermore, the second clutch includes a third elastic member, a third gear plate, a third coil, and a third armature disc, the third gear plate is mounted on the first shaft, and is movable in the axial direction relative to the first shaft and rotates synchronously with the first shaft; the first gear is provided with third end surface teeth cooperating with the third gear plate; the third armature disk is power-transmittingly connected to the third gear plate; one end of the third elastic member is connected to the first shaft and the other end is connected to the third armature disk; a biasing force is applied to the third elastic member so that the third gear plate is in a position separated from the third end surface teeth; and the third coil is provided between the first gear and the third armature disk; the third clutch includes a fourth elastic member, a fourth gear plate, a fourth coil, and a fourth armature disc; The fourth gear plate is mounted on the second shaft, and is movable axially relative to the second shaft and rotates synchronously with the second shaft. The fourth gear has fourth end surface teeth that cooperate with the fourth gear plate. The fourth armature disk is power-transmittingly connected to the fourth gear plate. One end of the fourth elastic member is connected to the second shaft and the other end is connected to the fourth armature disk. A biasing force is applied to the fourth elastic member so that the fourth gear plate is in a position where it is separated from the fourth end surface teeth. The fourth coil is provided between the fourth gear and the fourth armature disk. [Effects of the Invention]

[0016] The advantages and beneficial effects of the present invention are as follows:

[0017] In the horizontal drive assembly of the present invention, by providing a first shaft and a second shaft arranged in parallel, it is possible to realize switching between high and low speed stages, and by further providing a reduction mechanism between the second shaft and the differential, it is possible to realize power output with a high transmission speed ratio, and the horizontal drive assembly has the advantages of a small envelope, light weight, low cost, and high efficiency. [Brief explanation of the drawings]

[0018] Various other benefits and advantages will become apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Furthermore, like reference numerals refer to like parts throughout the drawings.

[0019] [Figure 1] FIG. 1 is a structural schematic diagram of a horizontal driving assembly according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a structural schematic diagram of a horizontal driving assembly according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the described embodiments are only some embodiments of the present invention, and are not all embodiments. All other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention are within the protection scope of the present invention.

[0021] Hereinafter, technical solutions according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings. Example 1

[0022] This embodiment provides a horizontally mounted drive assembly, which, as shown in Figure 1, includes a power source 1, a transmission mechanism 2, and a reduction mechanism 3. The power source 1 can be an electric motor or an engine.

[0023] Specifically, the transmission mechanism 2 includes a first shaft 4 and a second shaft 5 arranged in parallel. The first shaft 4 is connected to the power source 1, and the second gear 8 and the fourth gear 9 are both loosely fitted to the second shaft 5. That is, the second gear 8 is loosely fitted to the second shaft 5 via a first bearing 17, and the fourth gear 9 is loosely fitted to the second shaft 5 via a second bearing 18. Although loosely fitted, neither the second gear 8 nor the fourth gear 9 moves in the axial direction. Needle bearings may be selected for the first bearing 17 and the second bearing 18. A first clutch capable of cooperating with the second gear 8 and the fourth gear 9 is mounted on the second shaft 5, and the power transmission connection between the second gear 8 and the fourth gear 9 and the second shaft 5 can be achieved by controlling the first clutch.

[0024] Specifically, the first gear 6 and the third gear 7 may be fixed to the first shaft 4 by means of interference fit connection, spline connection, flat key connection or the like, and the first gear 6 meshes with the second gear 8 to transmit power, and the third gear 7 meshes with the fourth gear 9 to transmit power. Furthermore, the transmission ratio between the first gear 6 and the second gear 8 is different from the transmission ratio between the third gear 7 and the fourth gear 9, so that two types of gear ratio outputs are realized; that is, by controlling the first clutch, power transmission between the first shaft 4 and the second shaft 5 is realized by meshing the first gear 6 with the second gear 8 or by meshing the third gear 7 with the fourth gear 9, and four types of gears (low speed, high speed, neutral speed, parking speed) can be switched, and different situations can be accommodated.

[0025] In this embodiment, the second gear and the fourth gear are installed to form a transmission connection with the second shaft through the first clutch, i.e., the first clutch controls the transmission connection relationship between the second gear and the second shaft, and the fourth gear and the second shaft. In this way, when the first clutch simultaneously cuts off the transmission connection between the second gear and the second shaft, the load on the second shaft is completely unloaded, and the second shaft operates in an idling state, effectively reducing the power loss of the second shaft rotation.

[0026] 1, the reduction gear 3 is mounted on the end of the second shaft 5 near the fourth gear 9 and is connected to a differential 10, and power is transmitted to an output half shaft 11 via the differential 10, which then rotates the wheels, thereby realizing power output. Of course, in other embodiments, the reduction gear may be mounted on the end of the second shaft near the second gear and connected to a differential.

[0027] In the horizontal drive assembly of this embodiment, by controlling the transmission ratio of the gears in the reduction mechanism and coordinating with the transmission of two different speed ratios between the first and second shafts, the horizontal drive assembly achieves a high transmission ratio and output. This horizontal drive assembly only adopts a two-stage transmission structure and can achieve a high transmission ratio and large torque output without using a high-torque power source, which has the advantages of a simpler overall structure, a smaller envelope, lighter weight, lower cost, and higher efficiency.

[0028] In this embodiment, the rotor shaft of the power source and the first shaft are integrated, thus reducing the impact of the rotor shaft on the transmission mechanism. In another embodiment of the present invention, the rotor shaft of the power source may be connected to the first shaft via a coupling.

[0029] In addition, in this embodiment, by connecting the power source to the end of the first shaft closest to the third gear, the installation distance between the first and second shafts is determined according to the dimensions of the power source and the differential, thereby reducing the horizontal length of the transverse drive assembly. Of course, in other embodiments, the power source may be connected to the end of the first shaft closest to the first gear, in which case the installation distance between the first and second shafts is not affected by the dimensions of the power source and the differential, thereby reducing the vertical length of the transverse drive assembly. Therefore, the positional relationship between the power source and the transmission can be adjusted according to the installation space of the transverse drive assembly, further meeting the needs of different vehicle models.

[0030] 1, the second shaft 5 is a hollow shaft, and is coaxially mounted on an output half shaft 11 on one side of the differential 10, so that the second shaft 5 is rotatable relative to the output half shaft 11 while remaining axially fixed relative to it. The design in which the second shaft 5 is loosely fitted into the output half shaft on one side of the differential 10 makes full use of the original spatial volume of the differential 10, thereby making it possible to reduce the vertical volume when the transverse drive assembly and the differential 10 cooperate.

[0031] In this embodiment, as shown in FIG. 1, the reduction mechanism 3 includes a sun gear 12, a planetary carrier 13, a ring gear 14, and a planetary gear 15.

[0032] Specifically, the sun gear 12 is mounted on the second shaft 5, the ring gear 14 is loosely fitted coaxially around the sun gear 12, the ring gear 14 is fixedly connected to the housing of the transmission mechanism 2, the planetary gears 15 are disposed between the ring gear 14 and the sun gear 12 and mesh with the ring gear 14 and the sun gear 12, and the planetary gears 15 are connected to the planet carrier 13 via planet shafts 39, which are connected to a differential housing 16. The power on the second shaft 5 is transmitted to the differential housing 16 via the sun gear 12, planetary gears 15, planet shafts 39, and planet carrier 13 in sequence. By controlling the transmission ratio between the planetary gears 15 and the sun gear 12, the transverse drive assembly can output a large torque. The number of planetary gears is multiple, preferably three or four.

[0033] Furthermore, the planetary carrier and the differential housing are integrally manufactured and molded, which makes it easier to assemble the transverse drive assembly and makes the connection structure between the planetary carrier and the differential housing simpler and stronger. Of course, in other embodiments, the planetary carrier and the differential housing may be separate structures that are processed and manufactured separately and then fixedly connected by screw / bolt connection or welding, and separate planetary carrier and differential housing are easier to process and manufacture.

[0034] 1, in this embodiment, the first clutch is mounted on the second shaft 5 between the second gear 8 and the fourth gear 9, and includes a first elastic member 19, a second elastic member 20, a first gear plate 21, a second gear plate 22, a first coil 23, a first armature disc 24, and a second armature disc 25. The first elastic member 19 and the second elastic member 20 may be springs, elastic pieces, or spring packs.

[0035] Specifically, the first gear plate 21 and the second gear plate 22 are both mounted on the second shaft 5, and are capable of axial movement relative to the second shaft 5 and synchronous rotation. For example, the first gear plate 21 and the second gear plate 22 may be connected to the second shaft 5 via a spline, and thus the first gear plate 21 and the second gear plate 22 are only capable of axial movement on the second shaft 5 and are unable to rotate relative to each other.

[0036] The second gear 8 is provided with first end surface teeth that cooperate with the first gear plate 21, and the fourth gear 9 is provided with second end surface teeth that cooperate with the second gear plate 22, and the first armature disc 24 and the second armature disc 25 are transmission-connected to the first gear plate 21 and the second gear plate 22, respectively.

[0037] One end of the first elastic member 19 is connected to the second shaft 5, and the other end is connected to the first armature disk 24, and a biasing force is applied to the first elastic member 19 so that the first gear plate 21 is in a position where it engages with the first end surface teeth. One end of the second elastic member 20 is connected to the second shaft 5, and the other end is connected to the second armature disk 25, and a biasing force is applied to the second elastic member 20 so that the second gear plate 22 is in a position where it engages with the second end surface teeth.

[0038] The first coil 23 is disposed between the first armature disc 24 and the second armature disc 25, and is attracted to the first armature disc 24 and the second armature disc 25 after being energized. The first armature disc 24 is fixedly connected to the first gear plate 21, and the second armature disc 25 is fixedly connected to the second gear plate 22. Of course, in other embodiments, the first armature disc and the second armature disc may be transmission-connected to the first gear plate and the second gear plate via bearings, respectively, and the first elastic member abuts against the second shaft and the first armature disc, respectively, and the second elastic member abuts against the second shaft and the second armature disc, respectively. In this case, the first armature disc and the first gear plate can rotate independently, and the second armature disc and the second gear plate are transmission-connected and can rotate independently. In this way, the first armature disc and the second armature disc do not need to rotate following the second shaft, which reduces the rotational load on the second shaft and further reduces the kinetic energy loss.

[0039] As shown in FIG. 1, the second shaft is provided with a first shoulder 26 , and both the first elastic member 19 and the second elastic member 20 are connected to the second shaft 5 via the first shoulder 26 .

[0040] Furthermore, the first coil may be connected to the housing of the transmission mechanism, so that the first coil is fixed relatively, and the first coil includes a first partial coil and a second partial coil arranged parallel to the axial direction, among which there are a plurality of first partial coils and second partial coils, and the first partial coils and second partial coils are arranged alternately and uniformly, so that the adhesive force generated by the first coil against the first armature disk and the second armature disk becomes more uniform.

[0041] In addition, a magnetic shielding member is provided on both the end of the first partial coil close to the second armature disk and the end of the second partial coil close to the first armature disk, so that the first partial coil can attract only the first armature disk after being energized, and the second partial coil can attract only the second armature disk after being energized.

[0042] When the first partial coil is energized, the first coil attracts the first armature disk, causing the first armature disk to move away from the second gear against the elastic force of the first elastic member, and also moving the first gear plate in the axial direction, separating the first gear plate from the first end surface teeth. At this time, no power is transmitted between the second gear and the second shaft.

[0043] When the second partial coil is energized, the second coil attracts the second armature disk, causing the second armature disk to move away from the fourth gear against the elastic force of the second elastic member, and also moving the second gear plate in the axial direction, separating the second gear plate from the second end surface teeth. At this time, no power is transmitted between the fourth gear and the second shaft.

[0044] When both the first coil and the second coil are energized, the first gear plate and the first end surface teeth are separated, and the second gear plate and the second end surface teeth are separated, and at this time, no power is transmitted between the second gear and the second shaft, nor between the fourth gear and the second shaft.

[0045] In this embodiment, the first partial coil and the second partial coil are arranged in parallel in the axial direction, and one clutch can be used to control whether two gear plates (i.e., the first gear plate and the second gear plate) engage with the end surface teeth, and the structure of the first clutch can be made more compact and the axial length can be made shorter.

[0046] Furthermore, the first armature disk is provided with a permanent magnet corresponding to the first partial coil, and the second armature disk is provided with a permanent magnet corresponding to the second partial coil. In this way, after the first partial coil and the second partial coil are energized to attract the first armature disk and the second armature disk, respectively, the first armature disk can be positioned to attract the first partial coil and the second armature disk can be positioned to attract the second partial coil without continuing to be energized, further reducing electrical energy loss in the coils.

[0047] Of course, a position restriction mechanism may be provided in the first clutch, and after the first partial coil is energized to attract the first armature disc and the second partial coil is energized to attract the second armature disc, the position restriction mechanism realizes position restriction of the first armature disc and the second armature disc, holds the first armature disc in a position where it attracts the first partial coil, and holds the second armature disc in a position where it attracts the second partial coil.In this way, the first partial coil and the second partial coil can be kept in a position where they attract the first coil, without continuing to be energized, and current loss in the coils can be reduced.

[0048] The working principle of the horizontal drive assembly in this embodiment is as follows.

[0049] When the first clutch is not operating, due to the action of the elastic forces of the first elastic member and the second elastic member, the first gear plate is in a position to engage with the first end surface teeth, and the second gear plate is in a position to engage with the second end surface teeth, so the first shaft and the second shaft cannot rotate, and the vehicle is in the parking gear.

[0050] When the first clutch is activated and only the first partial coil is energized, the first gear plate is in a position where it is separated from the first end surface teeth, and the second gear plate is in a position where it is engaged with the second end surface teeth, and the power source transmits power to the second shaft sequentially via the first shaft, the third gear, and the fourth gear, which is in a low gear position and can achieve a large torque output.

[0051] When the first clutch is activated and only the second partial coil is energized, the second gear plate is in a position where it is separated from the second end surface teeth, and the first gear plate is in a position where it is engaged with the first end surface teeth, and the power source transmits power to the second shaft sequentially via the first shaft, the first gear, and the second gear, which is a high-speed stage and can achieve high rotational speed output.

[0052] When the first clutch is activated and both the first partial coil and the second partial coil are energized, the first gear plate is in a position where it is separated from the first end surface teeth, and the second gear plate is in a position where it is separated from the second end surface teeth, and power transmission cannot be achieved between the first shaft and the second shaft, and this is the neutral stage.

[0053] As can be seen from the above, the transverse drive assembly can achieve transmission with two speed ratios, and by controlling the first clutch, can achieve switching between four speed stages, the transmission type is flexible and the driving needs of the entire vehicle for different road conditions can be met. When the vehicle accelerates at start-up or when climbing a slope with a heavy load, a transmission with a large speed ratio (i.e., a low speed) can be selected to improve the driving force of the entire vehicle and compensate for the deficiency of the driving force of the entire vehicle. When the entire vehicle is cruising, a transmission with a small speed ratio (i.e., a high speed) can be selected to meet the high-speed driving requirements of the entire vehicle, save energy, and improve the cruising range of the vehicle.

[0054] Of course, in other embodiments, the second gear and the fourth gear may each realize the transmission connection with the second shaft through two clutches, which is also within the protection scope of the present invention. Example 2

[0055] Unlike the first embodiment, as shown in FIG. 2 , in this embodiment, the first gear 6 is loosely fitted to the first shaft 4, and the fourth gear 9 is loosely fitted to the second shaft 5. That is, the first gear 6 is loosely fitted to the first shaft 4 via a third bearing 27, and the fourth gear 9 is loosely fitted to the second shaft 5 via a fourth bearing 28. Although they are loosely fitted, neither the first gear 6 nor the fourth gear 9 moves in the axial direction. Needle bearings may be selected for the third bearing 27 and the fourth bearing 28. A second clutch is provided between the first gear 6 and the first shaft 4, and a third clutch is provided between the fourth gear 9 and the second shaft 5. Specifically, the second gear 8 and the third gear 7 may be fixed to the first shaft 4 and the second shaft 5, respectively, by interference fit connection, spline connection, flat key connection, or the like. In addition, the power source 1 is connected to the end of the first shaft 4 that is closer to the first gear 6, so that the distance between the first shaft 4 and the second shaft 5 is not affected by the dimensions of the power source 1 and the differential 10.

[0056] 2, the second clutch includes a third elastic member 29, a third gear plate 30, a third coil 31, and a third armature disc 32. The third elastic member 29 may be a spring, an elastic piece, or a spring pack.

[0057] Specifically, the third gear plate 30 is mounted on the first shaft 4 so that the third gear plate 30 is axially movable relative to the first shaft 4 and rotates synchronously with the first shaft 4. For example, the third gear plate 30 may be connected to the first shaft 4 via a spline, and thus the third gear plate 30 is only capable of axial movement on the first shaft 4 but is unable to rotate relative thereto. The first gear 6 is provided with third end surface teeth cooperating with the third gear plate 30, and a third armature disc 32 is power-transmittingly connected to the third gear plate 30. One end of a third elastic member 29 is connected to the first shaft 4, and the other end is connected to the third armature disc 32. The third elastic member 29 is applied with a biasing force to keep the third gear plate 30 separated from the third end surface teeth. A third coil 31 is provided between the first gear 6 and the third armature disc 32. When energized, the third coil 31 is attracted to the third armature disc 32, and pulls the third gear plate 30 to engage with the third end surface teeth against the elastic force of the third elastic member 29, of which the third armature disc 32 is fixedly connected to the third gear plate 30. Of course, in other embodiments, the third armature disc may be power-transmittingly connected to the third gear plate through a bearing, and the third elastic member may abut against the first shaft and the third armature disc, respectively. At this time, the third armature disc and the third gear plate can rotate independently. In this way, the third armature disc does not need to rotate following the first shaft, and the rotational load on the first shaft is reduced, further reducing the loss of kinetic energy.

[0058] As shown in FIG. 2, the first shaft 4 is provided with a third shoulder 33 , and the third elastic member 29 is connected to the first shaft 4 via the third shoulder 33 .

[0059] In this embodiment, as shown in FIG. 2, the third clutch includes a fourth elastic member 34, a fourth gear plate 35, a fourth coil 36, and a fourth armature disc 37.

[0060] Specifically, the fourth gear plate 35 is mounted on the second shaft 5 so that the fourth gear plate 35 is movable in the axial direction relative to the second shaft 5 and rotates synchronously with the second shaft 5. For example, the fourth gear plate 35 may be connected to the second shaft 5 via a spline, and thus the fourth gear plate 35 is only movable in the axial direction on the second shaft 5 but is not able to rotate relative to the second shaft 5. The fourth gear 9 is provided with fourth end surface teeth that cooperate with the fourth gear plate 35, and a fourth armature disk 37 is power-transmittingly connected to the fourth gear plate 35. One end of a fourth elastic member 34 is connected to the second shaft 5, and the other end is connected to the fourth armature disk 37. A biasing force is applied to the fourth elastic member 34 to keep the fourth gear plate 35 separated from the fourth end surface teeth. A fourth coil 36 is provided between the fourth gear 9 and the fourth armature disk 37. When energized, the fourth coil 36 is attracted to the fourth armature disk 37, and pulls the fourth gear plate 35 to engage with the fourth end surface teeth against the elastic force of the fourth elastic member 34. Of these, the fourth armature disk 37 is fixedly connected to the fourth gear plate 35. Of course, in other embodiments, the fourth armature disc may be power-transmittingly connected to the fourth gear plate through a bearing, and the fourth elastic member abuts against the second shaft and the fourth armature disc, respectively. In this case, the fourth armature disc and the fourth gear plate can rotate independently. In this way, the fourth armature disc does not need to rotate following the second shaft, and the rotational load on the second shaft is reduced, further reducing the loss of kinetic energy.

[0061] As shown in FIG. 2, the second shaft 5 is provided with a fourth shoulder 38 , and the fourth elastic member 34 is connected to the second shaft 5 via the fourth shoulder 38 .

[0062] The working principle of the horizontal drive assembly in this embodiment is as follows.

[0063] When neither the second clutch nor the third clutch is energized and in operation, due to the action of the elastic forces of the first elastic member and the second elastic member, the first gear plate is in a position where it is separated from the first end surface teeth, and the second gear plate is in a position where it is separated from the second end surface teeth, so power transmission cannot be achieved between the first shaft and the second shaft, and this is the neutral stage.

[0064] When the second clutch is energized and operating, and the third clutch is not energized and not operating, the first gear plate is in a position where it engages with the first end surface teeth, and the second gear plate is in a position where it is separated from the second end surface teeth, and the power source transmits power to the second shaft sequentially via the first shaft, the first gear, and the second gear, which is a high-speed stage and can achieve high rotational speed output.

[0065] When the second clutch is not energized and not operating, and the third clutch is energized and operating, the first gear plate is in a position where it is separated from the first end surface teeth, and the second gear plate is in a position where it is engaged with the second end surface teeth, and the power source transmits power to the second shaft sequentially via the first shaft, the third gear, and the fourth gear, which is in a low gear position and can achieve a large torque output.

[0066] When the second clutch and the third clutch are both energized and operating, the first gear plate is in a position to engage with the first end surface teeth, the second gear plate is in a position to engage with the second end surface teeth, the first shaft and the second shaft cannot rotate, and the system is in the parking gear. Example 3

[0067] Unlike Example 1, in this example, the third gear is loosely fitted to the first shaft, the second gear is loosely fitted to the second shaft, the third gear and the second gear are respectively connected to the first shaft and the second shaft via clutches, and the first gear and the fourth gear are fixed to the first shaft and the second shaft, respectively. Example 4

[0068] Unlike Example 1, the first gear and the second gear in this example are loosely fitted to the first shaft, the first gear and the second gear are power-transmittingly connected to the first shaft via a clutch, and the second gear and the fourth gear are fixed to the second shaft.

[0069] The above is merely a specific embodiment of the present invention, and those skilled in the art can make other improvements or modifications based on the above teachings of the present invention. Those skilled in the art should understand that the above specific description is for better understanding the object of the present invention, and the protection scope of the present invention is based on the protection scope of the claims. [Explanation of symbols]

[0070] 1 power source, 2 transmission mechanism, 3 reduction mechanism, 4 first shaft, 5 second shaft, 6 first gear, 7 third gear, 8 second gear, 9 fourth gear, 10 differential, 11 output half shaft, 12 sun gear, 13 planet carrier, 14 ring gear, 15 planet gear, 16 differential housing, 17 first bearing, 18 second bearing, 19 first elastic member, 20 second elastic member, 21 first gear plate, 22 second gear plate, 23 first coil, 24 first armature disc, 25 second armature disc, 26 first shoulder, 27 third bearing, 28 fourth bearing, 29 third elastic member, 30 third gear plate, 31 third coil, 32 third armature disc, 33 third shoulder, 34 fourth elastic member, 35 fourth gear plate, 36 fourth coil, 37 4th armature disc, 38 4th shoulder, 39 planetary shaft.

Claims

1. a transverse drive assembly including a power source, a transmission mechanism, and a reduction mechanism; The gear shifting mechanism includes a first shaft and a second shaft arranged in parallel, the first shaft being powered by a power source, the first shaft being provided with a first gear and a third gear, the second shaft being provided with a second gear and a fourth gear, the first gear meshing with the second gear for power transmission, the third gear meshing with the fourth gear for power transmission, the first gear and the first shaft or the second gear and the second shaft being rotationally connected via a clutch, and the third gear and the first shaft or the fourth gear and the second shaft being powered by a clutch for power transmission. the reduction mechanism is mounted on the second shaft and is transmission-connected to a differential; the second gear and the fourth gear are both loosely fitted to the second shaft, and a first clutch that cooperates with the second gear and the fourth gear is mounted on the second shaft; the first clutch is provided between the second gear and the fourth gear, and includes a first elastic member, a second elastic member, a first gear plate, a second gear plate, a first coil, a first armature disk, and a second armature disk; The first gear plate and the second gear plate are both mounted on the second shaft, and the first gear plate and the second gear plate are axially movable relative to the second shaft and rotate synchronously. The second gear has first end surface teeth cooperating with the first gear plate, and the fourth gear has second end surface teeth cooperating with the second gear plate. The first armature disc and the second armature disc are respectively connected to the first gear plate and the second gear plate. One end of the first elastic member is connected to the second shaft, and the other end is connected to the first armature disc. a first elastic member connected to the second shaft and the other end connected to the second armature disk, wherein a biasing force is applied to the first elastic member so that the first gear plate is in a position where it engages with the first end surface teeth; one end of the second elastic member is connected to the second shaft and the other end is connected to the second armature disk, wherein a biasing force is applied to the second elastic member so that the second gear plate is in a position where it engages with the second end surface teeth; and the first coil is provided between the first armature disk and the second armature disk, and can be attached by suction to the first armature disk and the second armature disk, respectively.

2. 2. The transverse drive assembly of claim 1, wherein said second shaft is a hollow shaft, said second shaft being mounted on an output half shaft on one side of said differential.

3. The reduction mechanism includes a sun gear, a planetary carrier, a ring gear, and a planetary gear.

2. The transverse drive assembly according to claim 1, wherein the sun gear is mounted on the second shaft, the ring gear is loosely fitted coaxially on the outside of the sun gear, the planet gears are provided between the ring gear and the sun gear and mesh with the ring gear and the sun gear, respectively, the planet gears are connected to the planet carrier via planet shafts, and the planet carrier is connected to a differential housing.

4. The planetary carrier and the differential housing are connected by screws / bolts or fixedly connected by welding, or 4. The transverse drive assembly of claim 3, wherein said planet carrier and said differential housing are of one piece construction.

5. The first coil includes a first partial coil and a second partial coil arranged parallel to the axial direction.

2. The horizontal drive assembly according to claim 1, wherein a magnetic shield member is provided at an end of the first partial coil close to the second armature disk and an end of the second partial coil close to the first armature disk, and the first partial coil is capable of attracting only the first armature disk after being energized, and the second partial coil is capable of attracting only the second armature disk after being energized.

6. 2. The horizontal drive assembly of claim 1, wherein the second shaft has a first shoulder, and the first elastic member and the second elastic member are both connected to the second shaft via the first shoulder.

7. 5. The transverse drive assembly according to claim 1, wherein the first gear is loosely fitted to the first shaft, the fourth gear is loosely fitted to the second shaft, a second clutch is provided between the first gear and the first shaft, and a third clutch is provided between the fourth gear and the second shaft.

8. The second clutch includes a third elastic member, a third gear plate, a third coil, and a third armature disc. the third gear plate is mounted on the first shaft, the third gear plate is axially movable relative to the first shaft and rotates synchronously with the first shaft, the first gear is provided with third end surface teeth cooperating with the third gear plate, the third armature disk is power-transmittingly connected to the third gear plate, one end of the third elastic member is connected to the first shaft and the other end is connected to the third armature disk, a biasing force is applied to the third elastic member so that the third gear plate is in a position separated from the third end surface teeth, and the third coil is provided between the first gear and the third armature disk, The third clutch includes a fourth elastic member, a fourth gear plate, a fourth coil, and a fourth armature disc.

8. The transverse drive assembly according to claim 7, wherein the fourth gear plate is mounted on the second shaft, the fourth gear plate is axially movable relative to the second shaft and rotates synchronously with the second shaft, the fourth gear is provided with fourth end surface teeth cooperating with the fourth gear plate, the fourth armature disk is power-transmittingly connected to the fourth gear plate, one end of the fourth elastic member is connected to the second shaft and the other end is connected to the fourth armature disk, a biasing force is applied to the fourth elastic member so that the fourth gear plate is in a position where it is separated from the fourth end surface teeth, and the fourth coil is provided between the fourth gear and the fourth armature disk.

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