Wheel-side reduction gear and vehicle

Abstract

The application discloses a wheel-side speed reducer and a vehicle. The wheel-side speed reducer comprises a base, an input shaft, an actuator and a planetary gear set. The input shaft is rotatably installed on the base. The actuator comprises an actuating part and a driving part connected with the base, and the actuating part is in transmission connection with the input shaft. The sun gear of the planetary gear set is in rotation connection with the input shaft, the inner ring gear of the planetary gear set is fixedly connected with the base, and the planet carrier of the planetary gear set is in rotation connection with the base and is fixedly connected with the wheel of the vehicle. When gear shifting is needed, the driving part drives the actuating part to move, so that the input shaft is selectively in transmission connection with the sun gear or the planet carrier through the actuating part. The whole wheel-side speed reducer can realize 1-gear torque increase and 2-gear direct drive, which can meet the demand of large torque output under extreme working conditions and the demand of efficient and high-speed power output.

Description

Technical Field

[0001] This application belongs to the field of speed reducer technology, and particularly relates to a wheel-side speed reducer and a vehicle. Background Technology

[0002] With the increasingly widespread application of new energy power in automobiles, there is also a demand for equipping off-road vehicles with new energy power. The demand for new energy power in off-road vehicles includes not only the high efficiency and high speed required for general road use, but also the high torque output required for extreme conditions such as off-road adventures.

[0003] Therefore, it is necessary to optimize the transmission system of existing new energy vehicles so that it can meet different usage needs. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a wheel-side reducer and a vehicle that can simultaneously meet the requirements of high torque output and high speed output.

[0005] In a first aspect of this application, a wheel-side reducer is provided, comprising: a base connected to the body of a vehicle; an input shaft rotatably mounted on the base; an actuator including an actuator and a drive unit connected to the base, the actuator being drively connected to the input shaft; and a planetary gear set, the sun gear of the planetary gear set being rotatably connected to the input shaft, the internal ring gear of the planetary gear set being fixedly connected to the base, and the planet carrier of the planetary gear set being rotatably connected to the base and fixedly connected to the wheel of the vehicle; wherein the drive unit drives the actuator to move, so that the input shaft is selectively drively connected to the sun gear or the planet carrier through the actuator.

[0006] In some embodiments, the actuator is axially movable along the input shaft, thereby switching between a position connected to the sun gear drive and a position connected to the planet carrier drive.

[0007] In some embodiments, the planet carrier is provided with a first engagement tooth, the sun gear is provided with a second engagement tooth, and the actuator is provided with a third engagement tooth for engaging with the first engagement tooth and a fourth engagement tooth for engaging with the second engagement tooth.

[0008] In some embodiments, the tooth height direction of the first engaging tooth is perpendicular to the tooth height direction of the second engaging tooth; the first engaging tooth and / or the third engaging tooth includes at least two tooth segments distributed sequentially along the axial direction.

[0009] In some embodiments, the planetary carrier has a bushing portion at one end near the actuator, and the first engagement tooth is provided on the inner side of the bushing portion; the second engagement tooth is provided on the end face of the sun gear near the actuator.

[0010] In some embodiments, the bushing is fitted onto the outside of the actuator; the actuator is fitted onto the outside of the input shaft; and the actuator is keyed to the input shaft.

[0011] In some embodiments, the drive unit includes an electromagnetic coil, an electromagnetic induction element, a moving element, and an elastic element; both the electromagnetic coil and the electromagnetic induction element are mounted on the base; the elastic element acts on the actuator; when the electromagnetic coil is energized, the electromagnetic induction element couples with the electromagnetic coil to become magnetic, the electromagnetic induction element drives the moving element to move, the moving element drives the actuator to move against the elastic force of the elastic element, and the actuator is connected to one of the sun gear and the planet carrier in a transmission connection; when the electromagnetic coil is de-energized, the actuator resets under the elastic force of the elastic element, thereby connecting to the other of the sun gear and the planet carrier in a transmission connection.

[0012] In some embodiments, the base has a mounting cavity in which both the actuator and the planetary gear set are located.

[0013] In some embodiments, the planetary carrier is rotatably connected to the base via at least one first bearing; the sun gear is rotatably connected to the input shaft via a second bearing.

[0014] In some embodiments, the input shaft extends into the mounting cavity of the base and is rotatably connected to the base via a third bearing; the input shaft is rotatably connected to the planetary carrier via a fourth bearing.

[0015] In some embodiments, the base includes a steering knuckle and a reducer housing connected together; the planetary carrier is rotatably connected to the steering knuckle and the reducer housing respectively via two first bearings; the internal gear ring is fixedly connected to the reducer housing or integrally formed therefrom; and the input shaft is rotatably connected to the steering knuckle via the third bearing.

[0016] In some embodiments, the base further includes an intermediate plate located in the mounting cavity and connected to the steering knuckle; the drive unit is mounted on the intermediate plate.

[0017] In some embodiments, the wheel-side reducer further includes a mechanical pump connected to the base; the planetary gear set further includes a transmission component, and the mechanical pump is connected to the planetary carrier via the transmission component; the base has an oil reservoir communicating with the mounting cavity; the wheel-side reducer is provided with a lubrication channel; the oil inlet of the mechanical pump communicates with the oil reservoir and the oil outlet communicates with the lubrication channel, and the outlet of the lubrication channel corresponds to the position of the planetary gear set.

[0018] In some embodiments, the base is provided with a first oil passage communicating with the oil reservoir, the input shaft is provided with a second oil passage, and the planetary gear shaft of the planetary gear set is provided with a third oil passage; the wheel-side reducer also includes an oil guide plate, and the first oil passage, the second oil passage, the oil guide plate and the third oil passage are connected in sequence to form the lubrication channel.

[0019] In some embodiments, a first oil seal is provided between the planetary carrier and the base; the first oil seal is located outside the first bearing; a second oil seal is provided between the input shaft and the base; the second oil seal is located outside the third bearing.

[0020] In some embodiments, the transmission component is a gear sleeve, which is sleeved on the outside of the planetary carrier; the wheel-side reducer also includes a wheel speed sensor, which is mounted on the base and corresponds to the position of the gear sleeve.

[0021] In a second aspect of this application, a vehicle is provided that includes the wheel-side reducer described in the first aspect.

[0022] A wheel-side reducer according to one or more embodiments of this application includes a base, an input shaft, an actuator, and a planetary gear set. The base is connected to the vehicle body, and the input shaft is rotatably mounted on the base. The actuator includes an actuator and a drive unit connected to the base, the actuator being drively connected to the input shaft; the sun gear of the planetary gear set is rotatably connected to the input shaft, the internal ring gear of the planetary gear set is fixedly connected to the base, and the planet carrier of the planetary gear set is rotatably connected to the base and fixedly connected to the vehicle wheel, the planet carrier serving as the output component of the entire planetary gear set. When gear shifting is required, the drive unit drives the actuator to move, so that the input shaft can be selectively drively connected to the sun gear or the planet carrier through the actuator.

[0023] When the input shaft is connected to the sun gear drive via the actuator, the torque input to the planetary gear set by the sun gear is transmitted through the various components of the planetary gear set, achieving the effect of speed reduction and torque increase. The torque is finally output to the wheels by the planet carrier, achieving first-gear torque increase. When the input shaft is connected to the planet carrier drive via the actuator, the torque input by the input shaft is directly transmitted to the planet carrier and output to the wheels by the planet carrier, achieving second-gear direct drive.

[0024] Therefore, by setting up an actuator and a planetary gear set, the input shaft can be selectively connected to the sun gear or planetary carrier via the actuator. The entire wheel-side reducer can achieve 1st gear torque boost and 2nd gear direct drive, which can meet the high torque output requirements under extreme working conditions as well as the high efficiency and high speed power output requirements. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the wheel-side reducer in one or more embodiments of this application is shown.

[0027] Figure 2 It shows Figure 1 Exploded view of the wheel-side reducer.

[0028] Figure 3 It shows Figure 1 A full sectional view of the wheel-side reducer.

[0029] Figure 4 A schematic diagram of the actuator structure of the wheel-side reducer in one or more embodiments of this application is shown. Figure 1 .

[0030] Figure 5 A schematic diagram of the actuator structure of the wheel-side reducer in one or more embodiments of this application is shown. Figure 2 .

[0031] Figure 6 A schematic diagram of the moving parts of the actuator of the wheel-side reducer in one or more embodiments of this application is shown.

[0032] Figure 7 A schematic diagram of the planetary gear set of the wheel-side reducer in one or more embodiments of this application is shown.

[0033] Figure 8 It shows Figure 7 A schematic diagram of the assembly structure of the planet carrier, planet gears and transmission components in a planetary gear set.

[0034] Figure 9 A schematic diagram of the oil guide plate of the wheel-side reducer in one or more embodiments of this application is shown.

[0035] Figure 10A schematic diagram of the structure of a vehicle wheel is shown in one or more embodiments of this application, wherein the wheel is equipped with a wheel-side reducer.

[0036] Figure 11 It shows Figure 10 A cross-sectional view of the wheel hub, brake disc, and wheel-side reducer in the assembled state.

[0037] Explanation of reference numerals in the attached drawings: 100-Wheel-side reducer; 110-Base; 111-Steering knuckle; 112-Reducer housing; 113-Intermediate plate; 120-Input shaft; 130-Actuator; 131-Drive unit; 1311-Electromagnetic coil; 1312-Electromagnetic induction element; 1313-Moving element; 13131-Sliding sleeve; 13132-Magnetic ring; 1314-Elastic element; 132-Actuator; 1321-Third engagement gear; 1322-Fourth engagement gear; 140-Planetary gear set; 141-Planet carrier; 1411-First engagement gear; 1412-Main body; 1413-Shaft sleeve; 1414-Travel gear set. Star wheel shaft, 142-Sun gear, 1421-Second engagement gear, 143-Internal gear ring, 144-Planet gear, 145-Transmission component; 151-First bearing, 152-Second bearing, 153-Third bearing, 154-Fourth bearing; 160-Mechanical pump; 170-Oil guide plate, 171-Oil collection groove, 172-Oil guide port; 181-First oil seal, 182-Second oil seal, 183-Sealing ring; 190-Wheel speed sensor; a-Mounting cavity, b-Oil reservoir, c-First oil passage, d-Second oil passage, e-Third oil passage, f-Lubrication channel; 200-Wheel, 210-Wheel hub, 220-Brake disc. Detailed Implementation

[0038] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0040] The demand for new energy power in new energy off-road vehicles includes not only the high efficiency and high speed required for general road use, but also the high torque output required for extreme conditions such as off-road adventures. In related technologies, to meet these two application requirements, the industry's common solution is to increase the speed ratio of the electric drive assembly to achieve high torque output; at the same time, to maintain the maximum vehicle speed, the motor speed is also made very high. However, vehicles do not require high torque when driving on normal roads, and the high speed of the motor and the gear assembly capable of achieving a high speed ratio result in significant redundancy and waste.

[0041] Therefore, this application provides a wheel-side reducer and a vehicle. The wheel-side reducer has two gears: a 1st gear for torque boosting and a 2nd gear for direct drive. It can meet both the high torque output requirements under extreme working conditions and the high-efficiency, high-speed power output requirements.

[0042] The specific technical solutions of this application will be described in detail below with reference to the accompanying drawings, which are not necessarily drawn to scale. Similar or identical reference numerals may be used to designate the same or similar parts in different drawings. The use of similar or identical reference numerals in different drawings does not mean that all drawings including similar or identical reference numerals constitute a single or the same embodiment. The accompanying drawings illustrate the various embodiments discussed in this application in a generalized manner, by way of example and not limitation.

[0043] Please see Figure 1 According to a first aspect of this application, a wheel-side reducer 100 is provided. This wheel-side reducer 100 can be disposed in the wheel 200 of a vehicle and is used to transmit the torque input from the input shaft 120 to the wheel 200, driving the wheel 200 to rotate. Figure 10 As shown. Please refer to [the original text]. Figure 2 and Figure 3 The wheel-side reducer 100 includes a base 110, an input shaft 120, an actuator 130, and a planetary gear set 140. The base 110 is connected to the vehicle body and can serve as the mounting base for the entire wheel-side reducer 100. The input shaft 120 is rotatably mounted on the base 110.

[0044] Please see Figure 3 , Figure 4 and Figure 5 The actuator 130 includes an actuator 132 and a drive unit 131. The drive unit 131 is connected to the base 110 and can drive the actuator 132 to move. The actuator 132 is connected to the input shaft 120 for transmission. The actuator 130 can be a clutch, synchronizer, etc. The specific structure and working method of the actuator 130 are not limited in this application.

[0045] Please see Figure 2 , Figure 3 , Figure 7 and Figure 8The planetary gear set 140 is also mounted and fixed on the base 110. The planetary gear set 140 includes a planet carrier 141, a sun gear 142, an internal gear ring 143, and planet gears 144. The planet carrier 141 has several planet gear shafts 1414, and the planet gears 144 are mounted on the planet gear shafts 1414. The planet gears 144 are rotatably connected to the main body 1412 of the planet carrier 141 via the planet gear shafts 1414. The planet gears 144 mesh with both the sun gear 142 and the internal gear ring 143. The sun gear 142, planet carrier 141, and internal gear ring 143 in the planetary gear set 140 can all serve as input / output components of the planetary gear set 140.

[0046] Please see Figure 3 In some embodiments, the sun gear 142 of the planetary gear set 140 is rotatably connected to the input shaft 120, serving as the input component of the planetary gear set 140. The internal gear ring 143 of the planetary gear set 140 is fixedly connected to the base 110. The internal gear ring 143 can be interference-fitted with the base 110 or keyed. In some embodiments, the internal gear ring 143 can also be integrally formed with the base 110. The planet carrier 141 of the planetary gear set 140 is rotatably connected to the base 110, and the planet carrier 141 is fixedly connected to the vehicle wheel 200. The planet carrier 141 serves as the output component of the entire planetary gear set 140.

[0047] When a gear shift is required, the drive unit 131 can drive the actuator 132 to move, so that the input shaft 120 can be selectively connected to the sun gear 142 or the planetary carrier 141 via the actuator 132. When the input shaft 120 is connected to the sun gear 142 via the actuator 132, the torque input to the planetary gear set 140 by the sun gear 142 is transmitted through the various components of the planetary gear set 140, achieving the effect of speed reduction and torque increase. The torque is finally output to the wheel 200 by the planetary carrier 141, achieving first gear torque increase. When the input shaft 120 is connected to the planetary carrier 141 via the actuator 132, the torque input by the input shaft 120 is directly transmitted to the planetary carrier 141, and output to the wheel 200 by the planetary carrier 141, achieving second gear direct drive. When the wheel-side reducer 100 is in first gear, the output torque is greater, which is suitable for extreme working conditions such as off-road extrication. When the wheel-side reducer 100 is in 2nd gear, the output speed is higher. Since the torque is directly transmitted to the planetary carrier 141 in 2nd gear, and then directly transmitted to the wheel 200 without passing through the transmission mechanism, the transmission efficiency is higher, which can meet the needs of efficient and high-speed power output when the vehicle is driving on ordinary roads and highways.

[0048] Therefore, the wheel-side reducer 100 provided according to one or more embodiments of this application, by setting the actuator 130 and the planetary gear set 140, enables the input shaft 120 to be selectively connected to the sun gear 142 or the planetary carrier 141 through the actuator 132. The entire wheel-side reducer 100 can realize 1st gear torque boosting and 2nd gear direct drive, which can meet the high torque output requirements under extreme working conditions and the high efficiency and high speed power output requirements.

[0049] The drive unit 131 can drive the actuator 132 to move. The drive method of the drive unit 131 can be electric, magnetic, shift fork, etc., and this application does not impose any limitations. Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the drive unit 131 is an electromagnetic actuator, specifically including an electromagnetic coil 1311, an electromagnetic induction element 1312, a moving element 1313, and an elastic element 1314. The electromagnetic coil 1311 and the electromagnetic induction element 1312 are both mounted on the base 110, and the elastic element 1314 acts on the actuator 132. The electromagnetic coil 1311 can employ a dual-coil design. When the electromagnetic coil 1311 is energized, the electromagnetic induction element 1312 couples with the electromagnetic coil 1311, thus becoming magnetic. The moving element 1313 is equipped with a magnet; after the electromagnetic induction element 1312 becomes magnetic, it can drive the moving element 1313 to move. The two elements can be opposite poles attracting or like poles repelling. The moving element 1313 drives the actuator 132 to move against the elastic force of the elastic element 1314. The actuator 132 is connected to one of the sun gear 142 and the planet carrier 141 via a transmission connection. When the electromagnetic coil 1311 is de-energized, the magnetism of the electromagnetic induction element 1312 disappears, and the actuator 132 is reset under the elastic force of the elastic element 1314, thereby connecting with another transmission in the sun gear 142 and the planet carrier 141.

[0050] Please see Figure 6 In one embodiment, the moving component 1313 includes a sliding sleeve 13131 and a magnetic ring 13132. The magnetic ring 13132 is fixed on the sliding sleeve 13131 and is a permanent magnet. Along the axial direction of the input shaft 120, the electromagnetic induction element 1312 is located on the side of the magnetic ring 13132 closer to the actuator 132. The electromagnetic induction element 1312 and the magnetic ring 13132 are spaced apart. The sliding sleeve 13131 abuts against one side of the actuator 132, and the elastic element 1314 abuts against the other side of the actuator 132. When the electromagnetic coil 1311 is energized, the electromagnetic induction element 1312 becomes magnetic and attracts the magnetic ring 13132. The magnetic ring 13132 moves towards the actuator 132, causing the sliding sleeve 13131 to move synchronously, thus sliding and pushing the actuator 132 to move along one side of the axial direction of the input shaft 120. Figure 3In the illustrated embodiment, when the electromagnetic coil 1311 is energized, the actuator 132 moves to the right in the figure. When the electromagnetic coil 1311 is de-energized, the magnetism of the electromagnetic induction element 1312 disappears, and the actuator 132 moves to the other side of the axial direction of the input shaft 120 under the elastic force of the elastic element 1314 and resets.

[0051] The actuator 132 can move by moving, rotating, or a combination of moving and rotating. In some embodiments, the actuator 132 can move axially along the input shaft 120, thereby switching between a position driven by the sun gear 142 and a position driven by the planet carrier 141. That is, the actuator 132 can move axially relative to the input shaft 120, but cannot rotate relative to the input shaft 120. As a further embodiment, the actuator 132 can be sleeved on the outside of the input shaft 120. The actuator 132 can be keyed to the input shaft 120, for example, by a spline connection; in other embodiments, the mating portion of the actuator 132 and the input shaft 120 can be set as a prism.

[0052] Please see Figure 5 , Figure 7 and Figure 8 In some embodiments, the planet carrier 141 is provided with a first engagement tooth 1411, and the sun gear 142 is provided with a second engagement tooth 1421. The actuator 132 is provided with a corresponding third engagement tooth 1321 and a fourth engagement tooth 1322, and the actuator 132 can be a shift hub. The actuator 132 is connected to the planet carrier 141 via the engagement of the third engagement tooth 1321 and the first engagement tooth 1411, and is connected to the sun gear 142 via the engagement of the fourth engagement tooth 1322 and the second engagement tooth 1421.

[0053] Figure 8 A schematic diagram of the planet carrier 141 in some embodiments is shown; please refer to [link / reference]. Figure 8 The planetary carrier 141 has a sleeve portion 1413 at one end near the actuator 130, and a first engagement tooth 1411 is located on the inner surface of the sleeve portion 1413. The tooth height direction of the first engagement tooth 1411 is parallel to the radial direction of the planetary carrier 141 and perpendicular to the axial direction of the planetary carrier 141 and the input shaft 120, while the relative motion direction of the third engagement tooth 1321 when meshing with the first engagement tooth 1411 is along the axial direction of the input shaft 120. That is, the tooth height direction of the first engagement tooth 1411 is perpendicular to the relative motion direction of the third engagement tooth 1321 and the first engagement tooth 1411 when meshing.

[0054] The bushing portion 1413 is a part of the planet carrier 141 that protrudes from the main body portion 1412. The bushing portion 1413 is fitted onto the outside of the actuator portion 132, and the actuator portion 132 is fitted onto the outside of the input shaft 120. That is to say, the sun gear 142 and the actuator portion 132 are both located in the internal space of the planet carrier 141, and the input shaft 120 also extends into the internal space of the planet carrier 141. The input shaft 120, the actuator portion 132, and the bushing portion 1413 of the planet carrier 141 are nested layer by layer, and the input shaft 120, the sun gear 142, and the main body portion 1412 of the planet carrier 141 are nested layer by layer. This maximizes the use of the internal space of the planet carrier 141, making the internal structure of the entire wheel-side reducer 100 more compact and smaller in size, and making it easier to assemble into the hub 210 of the wheel 200.

[0055] Please see Figure 5 and Figure 8 In some embodiments, the first engagement tooth 1411 and / or the third engagement tooth 1321 include at least two segments of teeth arranged sequentially along the axial direction. As one embodiment, both the first engagement tooth 1411 and the third engagement tooth 1321 include at least two segments of teeth arranged sequentially along the axial direction and spaced apart. When the fourth engagement tooth 1322 meshes with the second engagement tooth 1421, the segments A of the first engagement tooth 1411 and the segments B of the third engagement tooth 1321 are staggered along the axial direction; when the fourth engagement tooth 1322 disengages from the second engagement tooth 1421, the segments A of the first engagement tooth 1411 and the segments B of the third engagement tooth 1321 mesh accordingly. By providing multiple segments of teeth, both the meshing strength between the actuator 132 and the planetary carrier 141 can be guaranteed, and the shifting stroke of the actuator 132 can be reduced.

[0056] Please see Figure 7 In some embodiments, the second engagement tooth 1421 is disposed on the end face of the sun gear 142 near the actuator 130. The tooth height direction of the second engagement tooth 1421 is parallel to the axial direction of the sun gear 142 and the input shaft 120 and perpendicular to the radial direction of the sun gear 142, while the relative motion direction of the fourth engagement tooth 1322 when meshing with the second engagement tooth 1421 is along the axial direction of the input shaft 120. That is, the tooth height direction of the second engagement tooth 1421 is parallel to the relative motion direction of the fourth engagement tooth 1322 and the second engagement tooth 1421 when meshing.

[0057] Since the planetary carrier 141 and the sun gear 142 are located on the same side of the actuator 130, if the tooth height direction of the first engagement tooth 1411 is parallel to the tooth height direction of the second engagement tooth 1421, then the first engagement tooth 1411 and the second engagement tooth 1421 should be located on opposite axial sides of the actuator 132, which would inevitably increase the axial dimension of the planetary carrier 141. Furthermore, during installation, the actuator 132 must be installed first, followed by the first engagement tooth 1411 on the planetary carrier 141, making the assembly process more complex. The first engagement tooth 1411 must also be designed as a separate structure from the main body 1412 of the planetary carrier 141, increasing the number of components in the planetary gear set 140. However, in this application, the tooth height direction of the first engagement tooth 1411 is perpendicular to the tooth height direction of the second engagement tooth 1421. The first engagement tooth 1411 does not require additional axial space, thus shortening the axial dimension of the planetary carrier 141. Moreover, the first engagement tooth 1411 can be integrally formed with the planetary carrier 141, resulting in a simpler structure and easier assembly.

[0058] The base 110 can be a frame structure or a closed shell, as long as it meets the installation requirements of various components; this application does not limit the specific structure. Please refer to [link / reference]. Figure 3 In some embodiments, the base 110 has a mounting cavity a, into which the input shaft 120 extends. The actuator 130 and the planetary gear set 140 are both located within the mounting cavity a of the base 110. The planetary gear set 140 requires oil lubrication during operation. To prevent oil leakage, oil seals are provided between the input shaft 120 and the base 110, and between the planetary gear set 140 and the base 110.

[0059] Please see Figure 3 As a further embodiment, the planetary carrier 141 is rotatably connected to the base 110 via at least one first bearing 151. The sun gear 142 is mounted on the input shaft 120 and rotatably connected to the input shaft 120 via a second bearing 152. The input shaft 120 is rotatably connected to the base 110 via a third bearing 153. In some embodiments, the input shaft 120 may also be rotatably connected to the planetary carrier 141 via a fourth bearing 154.

[0060] Please see Figure 1 , Figure 2 and Figure 3In some embodiments, the base 110 is a split structure, including a steering knuckle 111 and a reducer housing 112. Both the steering knuckle 111 and the reducer housing 112 may be equipped with flanges and connected by fasteners. Both the steering knuckle 111 and the reducer housing 112 are covers, which, when connected, form a mounting cavity a. In the planetary gear set 140, the planet carrier 141 is rotatably connected to the steering knuckle 111 and the reducer housing 112 respectively via two first bearings 151. The internal gear ring 143 is fixedly connected to the reducer housing 112, and the two can be connected by interference fit, key connection, bonding, etc. As one implementation, the internal gear ring 143 is interference-fitted with the reducer housing 112, with one axial end of the internal gear ring 143 limited by a shoulder hole in the inner wall of the reducer housing 112, and the other end limited by a snap ring. In other embodiments, the internal gear ring 143 can also be integrally formed with the reducer housing 112. The input shaft 120 is rotatably connected to the steering knuckle 111 via the third bearing 153. If the input shaft 120 extends into the planetary carrier 141, the input shaft 120 can also be rotatably connected to the planetary carrier 141 via the fourth bearing 154.

[0061] The drive unit 131 of the actuator 130 can be mounted in the steering knuckle 111. See also... Figure 2 and Figure 3 In some embodiments, the base 110 further includes an intermediate plate 113, which is located in the mounting cavity a and connected to the steering knuckle 111. A drive unit 131 is mounted on the intermediate plate 113. The shape of the intermediate plate 113 can be adapted to the outer contour of the drive unit 131. For example, if the drive unit 131 is annular, a corresponding annular groove is provided on the intermediate plate 113, and the drive unit 131 is embedded in the annular groove. The intermediate plate 113 can be sleeved on the input shaft 120.

[0062] Planetary gear 140 requires lubrication during operation. Please refer to [link / reference]. Figure 3 In some embodiments, the base 110 has an oil reservoir b communicating with the mounting cavity a, and the oil reservoir b stores lubricating oil, which lubricates the planetary gears 144 by churning the oil. In other embodiments, the planetary gear set 140 may also employ active lubrication.

[0063] Please see Figure 2 and Figure 3In some implementations, the wheel-side reducer 100 further includes a mechanical pump 160, which is connected to and mounted on a base 110. The oil inlet of the mechanical pump 160 is connected to the oil reservoir b. The planetary gear set 140 also includes a transmission component 145. The mechanical pump 160 is connected to the planetary carrier 141 via the transmission component 145. When the planetary carrier 141 rotates, it drives the transmission component 145 to rotate, thereby driving the mechanical pump 160. The wheel-side reducer 100 is provided with a lubrication channel f. The oil inlet of the mechanical pump 160 is connected to the oil reservoir b, and the oil outlet is connected to the lubrication channel f. The outlet of the lubrication channel f corresponds to the position of the planetary gear set 140. When the mechanical pump 160 is running, it pumps the lubricating oil in the oil reservoir b to the planetary gear set 140 through the lubrication channel f, lubricating the various components in the planetary gear set 140 and achieving active lubrication.

[0064] The mechanical pump 160 can be directly installed in the oil storage chamber b. In some embodiments, the pump housing of the mechanical pump 160 can be directly machined on the base 110, meaning the base 110 also serves as the pump housing of the mechanical pump 160, significantly saving internal space and further reducing the number of parts. The planetary carrier 141 is connected to the transmission component 145 via interference fit, key connection, or bonding. In other embodiments, the transmission component 145 can also be integrally formed with the planetary carrier 141.

[0065] The lubrication channel f can be a pipe or a channel located within a component; this application does not impose any limitations. Please refer to [link / reference]. Figure 3 In some embodiments, the base 110 is provided with a first oil passage c communicating with the oil reservoir b, the input shaft 120 is provided with a second oil passage d, the planetary gear shaft 1414 of the planetary gear set 140 is provided with a third oil passage e, and the wheel-side reducer 100 also includes an oil guide plate 170. The first oil passage c, the second oil passage d, the oil guide plate 170, and the third oil passage e are sequentially connected to form a lubrication channel f (the flow path of the lubricating oil is as follows). Figure 3 (As shown by the lines with arrows). The second oil passage d in the input shaft 120 can have multiple oil outlets, so that the lubricating oil in the second oil passage d is delivered to each bearing cavity of the wheel-side reducer 100 under the action of rotational centrifugal force.

[0066] Figure 9 A schematic diagram of the oil guide plate 170 in some embodiments is shown. Please refer to [link / reference]. Figure 3 and Figure 9The oil guide plate 170 is generally annular and is sleeved on the outside of the input shaft 120. The oil guide plate 170 has an annular oil collection groove 171 and an oil guide port 172, which is the same number as the planetary gear shafts 1414 of the planet carrier 141. The oil collection groove 171 is connected to the third oil passage e opened in the planetary gear shaft 1414 through the oil guide port 172, thereby lubricating the bearings between the planetary gear 144 and the planetary gear shaft 1414, the meshing points between the planetary gear 144 and the sun gear 142, and the meshing points between the planetary gear 144 and the internal gear ring 143.

[0067] In one embodiment, the first oil passage c is located in the steering knuckle 111. In another embodiment, the base 110 further includes an intermediate plate 113, both the steering knuckle 111 and the intermediate plate 113 having a first oil passage c. The intermediate plate 113 is fitted onto the input shaft 120, and the outlet of the first oil passage c in the intermediate plate 113 is aligned with the inlet of the second oil passage d in the input shaft 120. To prevent lubricating oil leakage from the gap between the intermediate plate 113 and the input shaft 120, please refer to [reference needed]. Figure 3 In some embodiments, two sealing rings 183 are provided between the intermediate plate 113 and the input shaft 120. The two sealing rings 183 are located on both sides of the axial direction at the connection between the first oil passage c and the second oil passage d, and the sealing rings 183 achieve dynamic sealing.

[0068] Please see Figure 3 In some embodiments, a first oil seal 181 is provided between the planetary carrier 141 and the base 110, and the first oil seal 181 is located outside the first bearing 151. A second oil seal 182 is provided between the input shaft 120 and the base 110, and the second oil seal 182 is located outside the third bearing 153. The sealing performance of the wheel-side reducer 100 is ensured by providing the first oil seal 181 and the second oil seal 182. Furthermore, since the oil seals are all located outside the corresponding bearings, the bearings can also be lubricated by lubricating oil.

[0069] Please see Figure 3 In some embodiments, the transmission component 145 is a gear sleeve, which is fitted onto the outside of the planetary carrier 141. The wheel-side reducer 100 also includes a wheel speed sensor 190, which is mounted on the base 110 and corresponds to the position of the gear sleeve. That is, the gear sleeve not only transmits the rotation of the planetary carrier 141 to the mechanical pump 160, driving the mechanical pump 160, but also serves as a signal tooth for the wheel speed sensor 190 (the output signals differ when the tooth portion and tooth gap of the wheel speed sensor 190 correspond to those of the signal tooth). This eliminates the need for a dedicated signal tooth for the wheel speed sensor 190 in the wheel-side reducer 100, further reducing the number of components.

[0070] A second aspect of this application provides a vehicle that includes the wheel-side reducer 100 described in the first aspect. Please refer to... Figure 10 The wheel-side reducer 100 can be installed in at least one wheel 200 of the vehicle. The wheel-side reducer 100 transmits the torque input from the input shaft 120 to the wheel 200, driving the wheel 200 to rotate. The power of the input shaft 120 can come from an engine or an electric motor, and this application does not impose any restrictions. Therefore, the vehicle can be either a fuel-powered vehicle or a new energy vehicle (including but not limited to pure electric vehicles, range-extended vehicles, hybrid vehicles, etc.).

[0071] Please see Figure 10 and Figure 11 In some embodiments, the planet carrier 141 of the planetary gear set 140 is connected to the hub 210 of the wheel 200 by bolts, and the brake disc 220 of the wheel 200 is clamped between the planet carrier 141 and the hub 210, and is locked together by the same bolts. The steering knuckle 111 is connected to the vehicle body. The specific structure of the steering knuckle 111 and other undescribed aspects of the vehicle can be found in relevant prior art disclosures, and this application does not impose any limitations.

[0072] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0074] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0075] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0078] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0079] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A wheel-side reducer, characterized in that, include: The base, which connects to the vehicle body; An input shaft is rotatably mounted on the base; The actuator includes an execution part and a drive part connected to the base, wherein the execution part is drively connected to the input shaft; as well as The planetary gear set has a sun gear rotatably connected to the input shaft, an internal gear ring fixedly connected to the base, and a planet carrier rotatably connected to the base and fixedly connected to the wheels of the vehicle. The drive unit drives the actuator to move, so that the input shaft can be selectively connected to the sun gear or the planet carrier via the actuator.

2. The wheel-side reducer according to claim 1, characterized in that, The actuator is axially movable along the input shaft, thereby switching between a position connected to the sun gear drive and a position connected to the planetary carrier drive.

3. The wheel-side reducer according to claim 2, characterized in that, The planet carrier is provided with a first engagement tooth, and the sun gear is provided with a second engagement tooth; the actuator is provided with a third engagement tooth for engaging with the first engagement tooth and a fourth engagement tooth for engaging with the second engagement tooth.

4. The wheel-side reducer according to claim 3, characterized in that, The tooth height direction of the first engaging tooth is perpendicular to the tooth height direction of the second engaging tooth; the first engaging tooth and / or the third engaging tooth includes at least two tooth segments distributed sequentially along the axial direction.

5. The wheel-side reducer according to claim 3, characterized in that, The planetary carrier has a bushing portion at one end near the actuator, and the first engagement tooth is located on the inner side of the bushing portion; the second engagement tooth is located on the end face of the sun gear near the actuator.

6. The wheel-side reducer according to claim 5, characterized in that, The bushing is fitted onto the outside of the actuator; the actuator is fitted onto the outside of the input shaft; the actuator is keyed to the input shaft.

7. The wheel-side reducer according to any one of claims 1-6, characterized in that, The driving unit includes an electromagnetic coil, an electromagnetic induction element, a moving element, and an elastic element; the electromagnetic coil and the electromagnetic induction element are both mounted on the base; the elastic element acts on the actuating unit; When the electromagnetic coil is energized, the electromagnetic induction element is coupled to the electromagnetic coil and thus becomes magnetic. The electromagnetic induction element drives the moving element to move, and the moving element drives the actuator to move against the elastic force of the elastic element. The actuator is connected to one of the sun gear and the planet carrier in a transmission connection. When the electromagnetic coil is de-energized, the actuator resets under the elastic force of the elastic element, thereby connecting with the other transmission of the sun gear and the planet carrier.

8. The wheel-side reducer according to any one of claims 1-6, characterized in that, The base has a mounting cavity, and the actuator and the planetary gear set are both located in the mounting cavity of the base; The planetary carrier is rotatably connected to the base via at least one first bearing; the sun gear is rotatably connected to the input shaft via a second bearing. The input shaft extends into the mounting cavity of the base and is rotatably connected to the base via a third bearing; the input shaft is rotatably connected to the planetary carrier via a fourth bearing.

9. The wheel-side reducer according to claim 8, characterized in that, The base includes a steering knuckle and a reducer housing connected together; the planetary carrier is rotatably connected to the steering knuckle and the reducer housing respectively via two first bearings; the internal gear ring is fixedly connected to the reducer housing or integrally formed; the input shaft is rotatably connected to the steering knuckle via the third bearing.

10. The wheel-side reducer according to claim 9, characterized in that, The base also includes an intermediate plate, which is located in the mounting cavity and connected to the steering knuckle; the drive unit is mounted on the intermediate plate.

11. The wheel-side reducer according to claim 8, characterized in that, The wheel-side reducer also includes a mechanical pump, which is connected to the base; the planetary gear set also includes a transmission component, through which the mechanical pump is connected to the planetary carrier. The base has an oil storage chamber that communicates with the mounting cavity; the wheel-side reducer is provided with a lubrication channel; the oil inlet of the mechanical pump is connected to the oil storage chamber, the oil outlet is connected to the lubrication channel, and the outlet of the lubrication channel corresponds to the position of the planetary gear set.

12. The wheel-side reducer according to claim 11, characterized in that, The base is provided with a first oil passage communicating with the oil storage chamber, the input shaft is provided with a second oil passage, and the planetary gear shaft of the planetary set is provided with a third oil passage; The wheel-side reducer also includes an oil guide plate, and the first oil passage, the second oil passage, the oil guide plate and the third oil passage are connected in sequence to form the lubrication channel.

13. The wheel-side reducer according to claim 11, characterized in that, A first oil seal is provided between the planetary carrier and the base; the first oil seal is located on the outside of the first bearing; A second oil seal is provided between the input shaft and the base; the second oil seal is located on the outside of the third bearing.

14. The wheel-side reducer according to claim 11, characterized in that, The transmission component is a gear sleeve, which is sleeved on the outside of the planetary carrier; The wheel-side reducer also includes a wheel speed sensor, which is mounted on the base and corresponds to the position of the gear sleeve.

15. A vehicle, characterized in that, The wheel-side reducer includes any one of claims 1-14.

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