Driving device and vehicle

Abstract

The invention relates to the technical field of vehicles, and discloses a driving device and a vehicle, the driving device comprises a power source, a first input shaft, a driving mechanism, a driven mechanism, a first output mechanism and a second output mechanism; the output end of the power source is connected with the first input shaft, the driving mechanism is in transmission connection with the first input shaft and the driven mechanism, and the driven mechanism is connected with the first output mechanism and the second output mechanism. Wherein each of the driving mechanism and the driven mechanism comprises two parts of gear teeth with opposite rotation directions. According to the driving device and the vehicle, the complexity and cost of the structure of the driving device are reduced, and the transmission efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and particularly to a driving device and a vehicle. Background Art

[0002] A driving device is usually provided in a vehicle. The driving device can convert various forms of energy (such as chemical energy of fuel, electrical energy, etc.) into mechanical energy to provide power for the vehicle to travel. In addition, functions such as speed change, torque change, vehicle steering, and differential can also be realized.

[0003] Currently, most driving devices on the market adopt two-stage or more multi-stage parallel shaft helical gear transmissions. The axial force generated by the helical gear meshing is large, making the structure of the driving device relatively complex and the overall transmission efficiency low. Summary of the Invention

[0004] In view of this, this application provides a driving device and a vehicle, which reduce the structural complexity and cost and improve the transmission efficiency.

[0005] Specifically, this application includes the following technical solutions:

[0006] In the first aspect of this application, a driving device is provided. The driving device includes: a power source, a first input shaft, a driving mechanism, a driven mechanism, a first output mechanism, and a second output mechanism;

[0007] The output end of the power source is connected to the first input shaft. The driving mechanism is connected to the first input shaft and is in transmission connection with the driven mechanism. The driven mechanism is respectively connected to the first output mechanism and the second output mechanism;

[0008] Wherein, both the driving mechanism and the driven mechanism include two parts of teeth with opposite helix directions.

[0009] Optionally, both the driving mechanism and the driven mechanism are herringbone gears.

[0010] Optionally, the driven mechanism includes a first driven gear, a second driven gear, and a first control member;

[0011] The first driven gear meshes with the driving mechanism and is connected to the first output mechanism;

[0012] The second driven gear meshes with the driving mechanism and is connected to the second output mechanism;

[0013] One end of the first control member is connected to the first driven gear, and the other end is connected to the second driven gear. One end and the other end of the first control member can be controllably combined or separated;

[0014] Wherein, the rotation directions of the first driven gear and the second driven gear are opposite.

[0015] Optionally, the driving mechanism includes a first driving gear, a second driving gear, and a second control member;

[0016] The first driving gear meshes with the first driven gear, and the second driving gear meshes with the second driven gear;

[0017] One end of the second control member is connected to the first driving gear, and the other end is connected to the second driving gear. The one end and the other end of the second control member can be controllably combined or separated;

[0018] Wherein, the rotation directions of the first driving gear and the second driving gear are opposite.

[0019] Optionally, the first control member is a clutch or a synchronizer; and / or,

[0020] The second control member is a clutch or a synchronizer.

[0021] Optionally, the first output mechanism includes a first planetary gear train and a first output shaft. The second driven gear is connected to the first planetary gear train, and the first planetary gear train is connected to the first output shaft;

[0022] The second output mechanism includes a second output shaft, a planet carrier, and a second planetary gear train disposed around the first planetary gear train. The second planetary gear train is connected to the second driven gear and meshes with the first planetary gear train;

[0023] The planet carrier is disposed around the second planetary gear train. The inner ring of the planet carrier meshes with the second planetary gear train, and the planet carrier is also connected to the second output shaft.

[0024] Optionally, the first planetary gear train includes a first sun gear and a first planetary gear. The first sun gear is connected to the first output shaft. The first planetary gear meshes between the first sun gear and the second planetary gear train, and the first planetary gear is connected to the second driven gear;

[0025] The second planetary gear train includes a second sun gear and a second planetary gear. The second sun gear is connected to the second output shaft. The second planetary gear meshes with the first planetary gear, the second sun gear, and the inner ring of the planet carrier respectively, and the second planetary gear is also connected to the second driven gear.

[0026] Optionally, the driving device further includes a housing, and the power source, the first input shaft, the driving mechanism, the driven mechanism, the first output mechanism, and the second output mechanism are all disposed inside the housing;

[0027] The driving device further includes two first cylindrical bearings fixedly installed inside the housing, the two first cylindrical bearings are respectively located on opposite sides of the driving mechanism in the axial direction of the first input shaft, and are respectively connected to the first input shaft; and / or,

[0028] The driving device further includes two second cylindrical bearings fixedly installed inside the housing, one of the two first cylindrical bearings is located at one end of the first output shaft away from the second output shaft and is connected to the first output shaft, and the other of the two second cylindrical bearings is located at one end of the second output shaft away from the first output shaft and is connected to the second output shaft.

[0029] Optionally, the driving device further includes a housing, and the power source, the first input shaft, the driving mechanism, the driven mechanism, the first output mechanism and the second output mechanism are all arranged inside the housing;

[0030] The power source further includes a second input shaft, the axis of the first input shaft coincides with that of the second input shaft, and they are respectively located on opposite sides of the power source;

[0031] The driving device further includes a ball bearing fixedly arranged inside the housing, the ball bearing is located on the side of the power source away from the driving mechanism and is connected to the second input shaft.

[0032] The second aspect of the present application provides a vehicle, and the vehicle includes the above-mentioned driving device.

[0033] The beneficial effects of the technical solution provided by the embodiments of the present application at least include:

[0034] In the driving device and the vehicle provided by the embodiments of the present application, the power source generates a driving force, and the driving force is sequentially output to the first output mechanism and the second output mechanism through the first output shaft, the driving mechanism and the driven mechanism in sequence, so as to drive the wheels to rotate, realizing the travel and steering of the vehicle. Among them, since both the driving mechanism and the driven mechanism are provided with two parts of teeth with opposite helix directions, the axial forces generated by the teeth on both sides are equal in magnitude and opposite in direction, and can cancel each other out, reducing the axial load borne by the bearings, reducing the dependence on special components such as thrust bearings, reducing the complexity and cost of the driving device structure, and improving the reliability of the system. In addition, it can reduce the friction and energy loss caused by the axial force, making the gear transmission smoother. Therefore, compared with the solution of helical gear transmission in the related art, it can reduce the complexity of the driving device structure and improve the transmission efficiency. Description of the Drawings

[0035] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0036] Figure 1 The structural schematic diagram of the driving device provided by the embodiment of the present application is shown;

[0037] Figure 2 The schematic diagram of the connection relationship of some mechanisms in the driving device provided by the embodiment of the present application is shown.

[0038] Reference numerals:

[0039] 1. Power source;

[0040] 2. First input shaft;

[0041] 3. Driving mechanism; 31. First driving gear; 32. Second driving gear; 33. Second control member;

[0042] 4. Driven mechanism; 41. First driven gear; 42. Second driven gear; 43. First control member;

[0043] 5. First output mechanism; 51. First planetary gear train; 511. First sun gear; 512. First planetary gear; 52. First output shaft;

[0044] 6. Second output mechanism; 61. Second output shaft; 62. Planet carrier; 63. Second planetary gear train; 631. Second sun gear; 632. Second planetary gear;

[0045] 7. First cylindrical bearing; 71. Second cylindrical bearing;

[0046] 8. Second input shaft; 9. Ball bearing;

[0047] 10. Housing.

[0048] Through the above accompanying drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These accompanying drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application. To make the technical solutions and advantages of the present application clearer, the drive device, vehicle, etc. will be described in detail below with reference to the accompanying drawings.

[0050] A drive device is usually provided in a vehicle. The drive device can convert various forms of energy (such as the chemical energy of fuel, electrical energy, etc.) into mechanical energy to provide power for the vehicle to travel. In addition, functions such as speed change, torque change, vehicle steering, and differential can also be realized. At present, most drive devices on the market adopt two-stage or more parallel-axis helical gear transmissions. The helical gears generate large axial forces when meshing, making the structure of the drive device relatively complex and the overall transmission efficiency relatively low.

[0051] In view of this, the present application provides a drive device, as Figure 1 shown, the drive device may include: a power source 1, a first input shaft 2, a driving mechanism 3, a driven mechanism 4, a first output mechanism 5, and a second output mechanism 6; the output end of the power source 1 is connected to the first input shaft 2, the driving mechanism 3 is connected to the first input shaft 2 and is in transmission connection with the driven mechanism 4, and the driven mechanism 4 is respectively connected to the first output mechanism 5 and the second output mechanism 6; wherein, both the driving mechanism 3 and the driven mechanism 4 include two parts of teeth with opposite helix directions.

[0052] In the drive device provided in the embodiments of the present application, the power source 1 generates a driving force, and sequentially outputs the driving force to the first output mechanism 5 and the second output mechanism 6 through the first output shaft 52, the driving mechanism 3, and the driven mechanism 4 in sequence, thereby driving the wheels to rotate and realizing functions such as vehicle traveling and steering. Among them, since both the driving mechanism 3 and the driven mechanism 4 are provided with two parts of teeth with opposite helix directions, the axial forces generated by the teeth on both sides are equal in magnitude and opposite in direction, and can cancel each other out, reducing the axial load borne by the bearings, reducing the dependence on special components such as thrust bearings, reducing the complexity and cost of the drive device structure, and improving the reliability of the system. In addition, it can reduce the friction and energy loss caused by axial forces, making the gear transmission smoother. Therefore, compared with the solution of helical gear transmission in the related art, it can reduce the complexity of the drive device structure and improve the transmission efficiency.

[0053] In one example, both the driving mechanism 3 and the driven mechanism 4 may be herringbone gears.

[0054] Among them, the herringbone gear has a symmetrical structure and includes two parts of teeth with opposite helix directions. Exemplarily, a common gear includes a left-handed gear and a right-handed gear. The helix direction of the teeth on one side of the herringbone gear is left-handed, and the helix direction of the teeth on the other side is right-handed. The helix directions of the teeth on both sides can also be interchanged.

[0055] When both the driving mechanism 3 and the driven mechanism 4 adopt herringbone gears, the axial forces generated by the teeth on both sides of the driving mechanism 3 and the driven mechanism 4 are equal in magnitude and opposite in direction, and can cancel each other out, reducing the axial load borne by the bearings, reducing the dependence on special components such as thrust bearings, and reducing the complexity and cost of the driving device structure. In addition, it can reduce the friction and energy loss caused by the axial force and improve the transmission efficiency.

[0056] It should be noted that the tooth profile of the herringbone gear is a special herringbone shape. Compared with a common gear, its machining requires special tools and processing equipment. During the machining process, the tool not only needs to cut along the circumferential direction of the gear, but also needs to control a specific motion trajectory in the axial direction to form the herringbone tooth profile. This poses high requirements on the motion control accuracy and stability of the processing equipment, increasing the complexity and difficulty of machining. Moreover, due to the high machining accuracy requirements, the wear of the tool will directly affect the accuracy of the tooth profile. High requirements are imposed on the machining reference, measurement accuracy, etc., resulting in the problem that the herringbone gear produced may have low centering indexing accuracy between the left and right tooth surfaces. That is, the processed herringbone gear is not a completely symmetrical structure, which will inevitably accelerate the wear of the tooth surface, reduce its load-bearing capacity, and reduce the transmission efficiency at the same time.

[0057] To avoid the above problems, in some embodiments of the present application, as Figure 1 and Figure 2 shown, the driven mechanism 4 may include a first driven gear 41, a second driven gear 42, and a first control member 43; the first driven gear 41 meshes with the driving mechanism 3 and is connected to the first output mechanism 5; the second driven gear 42 meshes with the driving mechanism 3 and is connected to the second output mechanism 6. One end of the first control member 43 is connected to the first driven gear 41, and the other end is connected to the second driven gear 42. One end and the other end of the first control member 43 can be controllably combined or separated; wherein, the helix directions of the first driven gear 41 and the second driven gear 42 are opposite.

[0058] In the driving device provided in the embodiments of the present application, in the first aspect, the driven mechanism 4 does not directly adopt a herringbone gear, but uses two helical gears with opposite helix directions (the first driven gear 41 and the second driven gear 42) and a first control member 43 to jointly form a component similar to a herringbone gear. This component also includes two parts of helical teeth with opposite helix directions, which can be meshed and connected with the driving mechanism 3. Through the first control member 43, it can also ensure that the first driven gear 41 and the second driven gear 42 rotate synchronously, so that this component can achieve the functions that a herringbone gear can achieve. That is, it is equivalent to using two helical gears that are easy to manufacture and a first control member 43 to replace the herringbone gear, solving the problem of difficult processing of the herringbone gear. At the same time, due to the use of two helical gears with opposite helix directions, for helical gears, their processing difficulty is low, and it is not difficult to manufacture two helical gears with symmetrical structures and meeting the accuracy requirements, thus also being able to solve the problem of low centering indexing accuracy of the left and right tooth faces of the herringbone gear. It should be noted that at this time, the driving mechanism can be a herringbone gear or other components with two parts of helical teeth with opposite helix directions.

[0059] In some embodiments, the driving mechanism 3 may include a first driving gear, a second driving gear, and a second control member; the first driving gear meshes with the first driven gear 41, the second driving gear meshes with the second driven gear 42, one end of the second control member is connected to the first driving gear, and the other end is connected to the second driving gear. One end and the other end of the second control member can be controllably combined or separated; wherein, the helix directions of the first driving gear and the second driving gear are opposite. Replacing the driving mechanism 3 with two helical gears and a control member can also solve the problem of difficult processing of the herringbone gear. The specific principle is the same as that of the above embodiments and will not be elaborated here too much.

[0060] Optionally, the first control member 43 is a clutch or a synchronizer; and / or, the second control member is a clutch or a synchronizer.

[0061] In one embodiment, taking the first control member 43 as a clutch as an example, the clutch is arranged between the first driven gear 41 and the second driven gear 42, and can realize the synchronous rotation of the first driven gear 41 and the second driven gear 42 through the frictional coupling of friction plates and other components such as a flywheel.

[0062] It should be noted that when the clutch transmits power through friction plates and a flywheel, it has a certain flexibility. When there are slight angular deviations, position deviations, or speed differences between the first driven gear 41 and the second driven gear 42, the frictional coupling of the clutch can allow a certain degree of relative sliding and adaptive adjustment. Thus, the first driven gear 41 and the second driven gear 42 can better achieve adaptive meshing with the driving mechanism 3.

[0063] Moreover, the power output by the power source 1 often has certain vibrations and impacts, which will affect the normal meshing of the driving mechanism 3 and the driven mechanism 4. The friction coupling effect of the clutch can buffer and absorb these vibrations and impacts to a certain extent, reducing their influence on the driving device. This can also avoid problems such as increased tooth surface wear and poor contact caused by vibrations and impacts. In addition, the clutch has an overload protection function. When an overload occurs in the herringbone gear transmission system, the friction disc of the clutch will slip on the flywheel, thereby limiting the transmitted torque and preventing the herringbone gear from being jammed due to excessive load. Furthermore, it can effectively protect the safety of the driving device and avoid the situation of damage or jamming of the herringbone gear caused by accidental overload.

[0064] When the second control member is a clutch, it also has the above advantages, which is the same as the principle of the first control member 43 and will not be elaborated here too much.

[0065] It should be noted that in order to make the rotation speeds of the vehicle during curve driving basically consistent, an intermediate differential is needed at this time to adjust the speed difference between the front and rear wheels.

[0066] In some embodiments of the present application, such as Figure 1 and Figure 2 shown, the first output mechanism 5 may include a first planetary gear train 51 and a first output shaft 52. The second driven gear 42 is connected to the first planetary gear train 51, and the first planetary gear train 51 is connected to the first output shaft 52. The second output mechanism 6 may include a second output shaft 61, a planet carrier 62, and a second planetary gear train 63 disposed around the first planetary gear train 51. The second planetary gear train 63 is connected to the second driven gear 42 and meshes with the first planetary gear train 51. The planet carrier 62 is disposed around the second planetary gear train 63, the inner ring of the planet carrier 62 meshes with the second planetary gear train 63, and the planet carrier 62 is also connected to the second output shaft 61.

[0067] In the driving device provided by the embodiments of the present application, the differential function is realized through the first planetary gear train 51, the second planetary gear train 63, and the planet carrier 62. Specifically, when the vehicle is driving straight, the resistances received by the two side wheels are the same. At this time, the planetary gear train is in a special motion state. The power source 1 outputs driving force and drives the planet carrier 62 to rotate through the second driven gear 42. Since the resistances of the two side wheels are the same, the first planetary gear train 51 and the second planetary gear train 63 mesh with each other and, driven by the planet carrier 62, revolve with the planet carrier 62 but do not rotate on their own. At this time, the first output shaft 52 and the second output shaft 61 rotate at the same speed, that is, the two side wheels roll at the same speed, ensuring the stability of the vehicle driving straight.

[0068] When the vehicle is turning: The outer wheels need to travel a longer distance than the inner wheels, which requires the outer wheels to rotate faster than the inner wheels. At this time, the first planetary gear train 51 and the second planetary gear train 63 play a differential role. The power source 1 outputs a driving force and drives the planet carrier 62 to rotate through the second driven gear 42. Since the resistance of the outer wheels is small and the resistance of the inner wheels is large, in addition to revolving with the planet carrier 62, the internal components of the first planetary gear train 51 and the second planetary gear train 63 will also rotate on their own axes. This self-rotation causes the rotational speed of the output shaft on the outer side to increase and the rotational speed of the output shaft on the inner side to decrease, thus realizing the differential function.

[0069] Exemplarily, as Figure 2 shown, the first planetary gear train 51 may include a first sun gear 511 and a first planetary gear 512. The first sun gear 511 is connected to the first output shaft 52. The first planetary gear 512 meshes between the first sun gear 511 and the second planetary gear train 63, and the first planetary gear 512 is connected to the second driven gear 42. The second planetary gear train 63 may include a second sun gear 631 and a second planetary gear 632. The second sun gear 631 is connected to the second output shaft 61. The second planetary gear 632 is respectively meshed and connected with the first planetary gear 512, the second sun gear 631, and the inner ring of the planet carrier 62. The second planetary gear 632 is also connected to the second driven gear 42.

[0070] When the vehicle is traveling straight, the resistance on both sides of the wheels is the same. The power source 1 outputs a driving force and drives the planet carrier 62 to rotate through the second driven gear 42. Since the resistance on both sides of the wheels is the same, the first planetary gear meshes with the second planetary gear and revolves with the planet carrier 62, but does not rotate on its own axis. At this time, the first output shaft 52 and the second output shaft 61 rotate at the same speed, that is, the wheels on both sides roll at the same speed.

[0071] When the vehicle is turning: It is required that the rotational speed of the outer wheels is faster than that of the inner wheels. At this time, the power source 1 outputs a driving force and drives the planet carrier 62 to rotate through the second driven gear 42. Since the resistance of the outer wheels is small and the resistance of the inner wheels is large, in addition to revolving with the planet carrier 62, the first planetary gear 512 and the second planetary gear 632 will also rotate on their own axes. This self-rotation causes the rotational speed of the output shaft on the outer side to increase and the rotational speed of the output shaft on the inner side to decrease, thus realizing that the wheels on both sides rotate at different speeds to meet the needs of the vehicle turning.

[0072] In addition, the planetary gear structure (the first planetary gear train 51 and the second planetary gear train 63) is composed of the sun gear, the planetary gear, the planetary carrier 62 and the ring gear. These components can be coaxially arranged and nested with each other. Compared with the relatively independent and dispersed gear layout of the traditional differential, the planetary gear structure can also realize the differential function in a limited space. The axial size of the entire drive is effectively controlled, thereby reducing the space occupied by the drive device.

[0073] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the drive device may further include a housing 10, wherein the power source 1, the first input shaft 2, the active mechanism 3, the driven mechanism 4, the first output mechanism 5 and the second output mechanism 6 are all arranged inside the housing 10; the drive device further includes two first column bearings 7 fixedly mounted inside the housing 10, wherein the two first column bearings 7 are respectively located on opposite sides of the active mechanism 3 in the axial direction of the first input shaft 2 and are respectively connected to the first input shaft 2; and / or,

[0074] The drive device also includes two second column bearings 71 fixedly installed inside the shell 10, one of the two first column bearings 7 is located at the end of the first output shaft 52 away from the second output shaft 61 and is connected to the first output shaft 52, and the other of the two second column bearings 71 is located at the end of the second output shaft 61 away from the first output shaft 52 and is connected to the second output shaft 61.

[0075] It should be noted that in the helical gear transmission system, the helical gear will generate a large axial force when it is running. Column bearings (such as cylindrical roller bearings) are mainly used to bear radial loads. Its rollers and raceways are in line contact and have strong radial load-bearing capacity. However, cylindrical roller bearings can hardly bear axial loads. Under the action of axial force, the rollers are prone to axial displacement, resulting in bearing failure. Column bearings cannot provide effective support for input shafts and output shafts.

[0076] In the driving device provided in the embodiment of the present application, since the active mechanism 3 and the driven mechanism 4 both have two parts of gear teeth with opposite rotation directions, the axial forces generated by the gear teeth on both sides are equal in magnitude and opposite in direction, and can offset each other, thereby reducing the axial load borne by the bearings. Therefore, a first column bearing 7 can be provided in the housing 10 to support the first input shaft 2, and a second column bearing 71 can be provided to support the first output shaft 52 and the second output shaft 61. The friction between the rollers and the raceways of the column bearings is relatively small, and the movement of the rollers is relatively smooth, so that it can adapt to higher rotation speeds. In some transmission systems with higher rotation speed requirements, the use of column bearings can reduce the heat generated by friction, reduce wear, improve the efficiency and accuracy of the driving device, and ensure the normal operation of the driving device.

[0077] Optionally, the cylindrical bearing is a cylindrical roller bearing.

[0078] It should also be noted that the power source 1 will generate a certain axial force when it is running. The first output shaft 52 transmits power to the wheels, and there will be an axial force. If this axial force cannot be effectively balanced, the internal components of the power source 1 may suffer from excessive wear, deformation or displacement due to excessive axial force, which will seriously affect the service life of the motor.

[0079] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the power source 1 may further include a second input shaft 8, the axes of the first input shaft 2 and the second input shaft 8 coincide with each other, and are respectively located on opposite sides of the power source 1; the drive device also includes a ball bearing 9 fixedly arranged inside the housing 10, the ball bearing 9 is located on the side of the power source 1 away from the active mechanism 3, and is connected to the second input shaft 8.

[0080] The second output shaft 61 is provided and connected via the ball bearing 9, so as to disperse and balance the axial force transmitted to the power source 1 by the first output shaft 52, and prevent the wear, deformation and even damage of the components caused by the excessive axial force, thereby improving the reliability and service life of the power source 1 and the transmission system.

[0081] In addition, the common ball bearing 9 mainly bears radial loads, although it can only bear small axial loads. Under the action of large axial forces, the contact stress between the balls and raceways inside the bearings will increase, and the balls may become skewed or stuck, thereby affecting the normal operation of the transmission system.

[0082] In the drive device provided by the present application, both the active mechanism 3 and the driven mechanism 4 have two parts of gear teeth with opposite rotation directions. The axial forces generated by the gear teeth on both sides are equal in magnitude and opposite in direction, and can offset each other, reducing the axial load borne by the bearing. The ball bearing 9 can be used to support the second output shaft 61. In addition, the ball bearing 9 is rolling friction, and the friction coefficient between its rolling element and the raceway is very small compared to sliding friction. This reduces the energy loss caused by friction during the transmission process, thereby improving the transmission efficiency of the entire drive device.

[0083] Optionally, the ball bearing 9 may be a deep groove ball bearing 9, an angular contact ball bearing 9 or the like.

[0084] It should be noted that the power source 1 in the above embodiment may be an engine or an electric motor.

[0085] In some embodiments, the power input end of the first output mechanism 5 is connected to the driven mechanism 4, and the power output end of the first output mechanism 5 is connected to a wheel (which can be, for example, the left wheel). The power input end of the second output mechanism 6 is connected to the driven mechanism 4, and the power output end of the second output mechanism 6 is connected to a wheel (which can be, for example, the right wheel). The power source 1 can transmit the driving force to the wheels through the driving mechanism 3, the driven mechanism 4, the first output mechanism 5, the second output mechanism 6, etc., thereby driving the vehicle to move and ensuring the normal driving of the vehicle.

[0086] The present application also provides a vehicle, which includes the above-mentioned driving device.

[0087] In the vehicle provided by the embodiment of the present application, the power source 1 generates a driving force and sequentially outputs the driving force to the first output mechanism 5 and the second output mechanism 6 through the first output shaft 52, the driving mechanism 3, and the driven mechanism 4, thereby driving the wheels to rotate and realizing the traveling and steering of the vehicle. Among them, since both the driving mechanism 3 and the driven mechanism 4 are provided with two parts of teeth with opposite helix directions, the axial forces generated by the teeth on both sides are equal in magnitude and opposite in direction, and can cancel each other out, reducing the axial load borne by the bearing, reducing the dependence on special components such as thrust bearings, reducing the complexity and cost of the driving device structure, and improving the reliability of the system. In addition, it is possible to reduce the friction and energy loss caused by the axial force, making the gear transmission smoother. Therefore, compared with the solution of helical gear transmission in the related art, it is possible to reduce the complexity of the driving device structure and improve the transmission efficiency.

[0088] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" means two or more, unless otherwise clearly defined.

[0089] Those skilled in the art will readily think of other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary.

[0090] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A driving device, characterized in that, The driving device includes: a power source (1), a first input shaft (2), a driving mechanism (3), a driven mechanism (4), a first output mechanism (5) and a second output mechanism (6); The output end of the power source (1) is connected to the first input shaft (2), the driving mechanism (3) is connected to the first input shaft (2) and is in transmission connection with the driven mechanism (4), and the driven mechanism (4) is respectively connected to the first output mechanism (5) and the second output mechanism (6); Wherein, both the driving mechanism (3) and the driven mechanism (4) include two parts of teeth with opposite helix directions.

2. The drive device according to claim 1, characterized in that Both the driving mechanism (3) and the driven mechanism (4) are herringbone gears.

3. The drive device according to claim 1, characterized in that, The driven mechanism (4) includes a first driven gear (41), a second driven gear (42) and a first control member (43); The first driven gear (41) meshes with the driving mechanism (3) and is connected to the first output mechanism (5); The second driven gear (42) meshes with the driving mechanism (3) and is connected to the second output mechanism (6); One end of the first control member (43) is connected to the first driven gear (41), and the other end is connected to the second driven gear (42). One end and the other end of the control member (43) can be controllably combined or separated; Wherein, the helix directions of the first driven gear (41) and the second driven gear (42) are opposite.

4. The drive device according to claim 3, characterized in that, The driving mechanism includes a first driving gear, a second driving gear and a second control member; The first driving gear meshes with the first driven gear (41), and the second driving gear meshes with the second driven gear (42); One end of the second control member is connected to the first driving gear, and the other end is connected to the second driving gear. One end and the other end of the second control member can be controllably combined or separated; Wherein, the helix directions of the first driving gear and the second driving gear are opposite.

5. The drive device according to claim 4, characterized in that, The first control member (43) is a clutch or a synchronizer; and / or, The second control member is a clutch or a synchronizer.

6. The drive device according to claim 3, characterized in that The first output mechanism (5) includes a first planetary gear train (51) and a first output shaft (52). The second driven gear (42) is connected to the first planetary gear train (51), and the first planetary gear train (51) is connected to the first output shaft (52); The second output mechanism (6) includes a second output shaft (61), a planet carrier (62) and a second planetary gear train (63) disposed around the first planetary gear train (51). The second planetary gear train (63) is connected to the second driven gear (42) and is in meshing connection with the first planetary gear train (51); The planet carrier (62) is disposed around the second planetary gear train (63). The inner ring of the planet carrier (62) is in meshing connection with the second planetary gear train (63), and the planet carrier (62) is also connected to the second output shaft (61).

7. The drive device according to claim 6, characterized in that, The first planetary gear train (51) includes a first sun gear (511) and a first planetary gear (512). The first sun gear (511) is connected to the first output shaft (52). The first planetary gear (512) meshes between the first sun gear (511) and the second planetary gear train (63), and the first planetary gear (512) is connected to the second driven gear (42). The second planetary gear train (63) includes a second sun gear (631) and a second planetary gear (632). The second sun gear (631) is connected to the second output shaft (61). The second planetary gear (632) meshes and connects with the first planetary gear (512), the second sun gear (631), and the inner ring of the planet carrier (62) respectively, and the second planetary gear (632) is also connected to the second driven gear (42).

8. The drive device according to claim 6, characterized in that, The driving device further includes a housing (10), and the power source (1), the first input shaft (2), the driving mechanism (3), the driven mechanism (4), the first output mechanism (5), and the second output mechanism (6) are all arranged inside the housing (10). The driving device further includes two first cylindrical bearings (7) fixedly installed inside the housing (10). The two first cylindrical bearings (7) are respectively located on opposite sides of the driving mechanism (3) in the axial direction of the first input shaft (2), and are respectively connected to the first input shaft (2); and / or The driving device further includes two second cylindrical bearings fixedly installed inside the housing (10). One of the two first cylindrical bearings (7) is located at one end of the first output shaft (52) away from the second output shaft (61), and is connected to the first output shaft (52). The other of the two second cylindrical bearings is located at one end of the second output shaft (61) away from the first output shaft (52), and is connected to the second output shaft (61).

9. The drive device according to claim 6, characterized in that The driving device further includes a housing (10), and the power source (1), the first input shaft (2), the driving mechanism (3), the driven mechanism (4), the first output mechanism (5), and the second output mechanism (6) are all arranged inside the housing (10). The power source (1) further includes a second input shaft. The axis of the first input shaft (2) coincides with that of the second input shaft, and they are respectively located on opposite sides of the power source (1). The driving device further includes a ball bearing (9) fixedly arranged inside the housing (10). The ball bearing (9) is located on the side of the power source (1) away from the driving mechanism (3), and is connected to the second input shaft.

10. A vehicle, characterized in that, The vehicle includes the driving device according to any one of claims 1 to 9.

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