Truck chassis with wheel hub motor

Abstract

The invention discloses a truck chassis with a wheel hub motor, which relates to the technical field of drive systems and may include a chassis body, a driving bridge, a driven bridge and a suspension structure; the driving bridge is provided with a plurality of roots, the driving bridge includes a bridge housing, and wheels are rotatably mounted at both ends of the bridge housing; the wheel hub motor and the reducer are also included, the wheel hub motor and the reducer are both installed in the wheel, the wheel hub motor is installed on the bridge housing, the wheel hub motor is connected to the wheel, and is used to drive the wheel to rotate; the wheel hub motor is connected to a power source through an electric wire, and is used to supply power to the wheel hub motor; a half shaft is also rotatably mounted in the bridge housing, one end of the half shaft is used to be connected to the engine, and the other end passes through the bridge housing and is connected to the reducer, and the reducer is connected to the wheel, and is used to drive the wheel to rotate. The invention can control the wheel hub motors on both sides, realize new technologies such as braking energy recovery, chassis self-propelled and follow-up steering, trailer follow-up, etc., and can be widely used in multi-axle vehicles.

Description

Technical Field

[0001] The invention relates to the technical field of drive systems, and in particular to a truck chassis with a wheel hub motor. Background Art

[0002] With the development of electric vehicle technology and wheel hub motors, the application of wheel hub motors in trucks as an important power source has become a development direction for trucks. At present, most pure electric trucks drive the vehicle by transmitting the torque of the motor to the wheels through the drive shaft, but this power system has a large amount of energy and efficiency loss in mechanical transmission, and the corresponding chassis development cycle is long and the capital investment is large.

[0003] The chassis structure disclosed in the patent "A new type of electric truck chassis structure" (patent number: CN105438262B) is a typical structure of the current new energy heavy-duty vehicle chassis. It only replaces the internal combustion engine with an electric motor, and does not substantially solve the problem of low efficiency of the transmission mechanism.

[0004] The chassis structure disclosed in the patent "A Distributed Drive Vehicle Chassis" (patent number: CN100525518A) solves the problem of low efficiency of traditional transmission mechanisms. However, this patented technology completely eliminates the traditional transmission mechanism and power source, and cannot form a hybrid drive system. Moreover, for heavy-loaded vehicles, the power consumption is large, and the vehicle will completely stop working after the battery is exhausted. Therefore, the chassis in the above patented technology can only form a single-energy vehicle.

[0005] Other existing multi-wheel drive solutions simply place the motor next to the inside of the tire to form a simple wheel-side drive. At the same time, a lot of changes need to be made to the axle and chassis, and it cannot be effectively combined with friction braking.

[0006] Therefore, it is urgent to develop a new truck chassis with wheel hub motors to solve the above problems existing in the prior art. Summary of the invention

[0007] The purpose of the present invention is to provide a truck chassis with wheel hub motors to solve the above-mentioned problems existing in the prior art. The wheel hub motors on both sides can be controlled to realize new technologies such as brake energy recovery, chassis self-propelled and follow-up steering, trailer follow-up, etc., and can be widely used in multi-axle vehicles.

[0008] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a truck chassis with a hub motor, comprising a chassis body, a driving axle, a driven axle and a suspension structure; the driving axle is connected to the chassis body through the suspension structure, and the driving axle is provided with a plurality of roots, and the driving axle comprises a bridge housing, and wheels are rotatably mounted at both ends of the bridge housing; it also comprises a hub motor and a reducer, and the hub motor and the reducer are both mounted in the wheel, and the hub motor is mounted on the bridge housing, and the hub motor is connected to the wheel for driving the wheel to rotate; the hub motor is connected to a power source through an electric wire for powering the hub motor; a half shaft is also rotatably mounted in the bridge housing, and one end of the half shaft is used to be connected to an engine, and the other end passes through the bridge housing and is connected to the reducer, and the reducer is connected to the wheel for driving the wheel to rotate.

[0009] Preferably, a plurality of the active axles are arranged consecutively or spaced apart from each other in the front and rear; two active axles are provided, and the two active axles are connected to the chassis body through the suspension structure; the suspension structure adopts leaf springs or independent suspension.

[0010] Preferably, the hub motor comprises a sleeve, a stator core, a magnet, an outer rotor shell and a motor end cover; a middle wheel side shell is installed on the inner side of the sleeve, and the inner side of the sleeve is connected to the outer side of the middle wheel side shell by a flat key; the inner side of the middle wheel side shell is fixedly connected to the bridge housing by a flange; the stator core is sleeved on the outer side of the sleeve, the magnet is installed on the outer side of the stator core to form a rotor component, the outer rotor shell is sleeved on the outer side of the rotor component, and an air gap is left between the outer rotor shell and the rotor component; the motor end cover is fixed to the outer end of the outer rotor shell.

[0011] Preferably, it also includes an end wheel side shell and an inner wheel side shell, wherein the end wheel side shell is fixed to the inner side of the motor end cover and is used to connect the reducer; the inner wheel side shell is installed in the outer rotor shell, the end of the inner wheel side shell is fixedly connected to the inner end of the outer rotor shell, and the inner wheel side shell is fixedly connected to the wheel; the end wheel side shell and the inner wheel side shell are respectively sleeved on the two ends of the middle wheel side shell, and a seal is provided at the sleeve connection.

[0012] Preferably, the reducer is a planetary gear reducer, including a sun gear, a planet gear, a ring gear and a planetary disc carrier; the planetary disc carrier is fixed to the inner side of the end wheel side shell by bolts; a mounting groove is provided on the side of the planetary disc carrier away from the end wheel side shell, and a plurality of mounting parts are provided in the mounting groove, and each mounting part is mounted with a planetary gear; the inner side of the planetary gear is meshed with the sun gear, and the outer side is meshed with the ring gear, the sun gear is mounted on the half shaft, and the ring gear is fixedly connected to the second flange.

[0013] Preferably, the hub motor comprises a sleeve, a stator core, a magnet, a rotor yoke and a motor housing; the stator core is sleeved on the outer side of the sleeve, and the inner side of the sleeve is fixedly connected to the bridge housing through a flange; the magnet is sleeved on the outer side of the stator core, and the magnet is fixed to the inner side of the motor housing through the rotor yoke.

[0014] Preferably, the reducer is a planetary gear reducer, including a sun gear, planet gears, a ring gear and a planetary disc carrier; the outer edge of the planetary disc carrier is connected to the motor housing by bolts; a mounting portion is provided on the side of the planetary disc carrier away from the motor housing, and the planetary gear sleeve is arranged on the mounting portion; the inner side of the planetary gear is meshed with the sun gear, and the outer side is meshed with the ring gear, the sun gear is mounted on the half shaft, and the ring gear is fixedly connected to the wheel.

[0015] Preferably, a wheel side shell is also provided in the first wheel, and the wheel side shell includes a left wheel side shell and a right wheel side shell which are connected to each other, the left end of the right wheel side shell is connected to the left wheel side shell, and the right end is connected to the first wheel; a cavity is formed in the right wheel side shell and the left wheel side shell, the hub motor and the reducer are both installed in the cavity, and the ring gear of the reducer is fixed on the left wheel side shell.

[0016] Preferably, the planetary gear reducer adopts a two-stage planetary gear reducer to perform two-stage reduction.

[0017] Preferably, the planetary gear reducer adopts a two-stage planetary gear reducer to perform two-stage reduction;

[0018] The wheel comprises a wheel hub, the wheel hub is connected with a bearing connector, the bearing connector is rotatably mounted on the bridge housing through a bearing, and a tire is mounted on the outer side of the wheel hub;

[0019] A wheel is installed at both ends of the bridge housing;

[0020] Alternatively, two wheels are installed at both ends of the bridge housing, and the hub motor and the reducer are installed in the wheel hubs of the outer wheels.

[0021] Preferably, a groove is provided on the outer side of the bridge housing for allowing the electric wire to pass through to supply power to the hub motor; two flanges are provided, including a first flange and a second flange arranged back to back from the inside to the outside, and a gap is provided between the first flange and the second flange for allowing the electric wire to pass through; the first flange and the second flange are fixed to the bridge housing by bolts.

[0022] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0023] The hub motor truck chassis of the present invention can control the hub motors on both sides to achieve braking energy recovery, chassis self-propelling and automatic steering.

[0024] The chassis can be used for trailer driving, so that the trailer has new technologies such as follow-up control.

[0025] The chassis can be widely used in multi-axle vehicles such as heavy and light trucks, trailers, buses, and engineering vehicles.

[0026] The truck chassis using the hub motor of the present invention can not only optimize the transmission structure of the whole vehicle and greatly improve the transmission efficiency, but also increase the torque and extend the cruising range under the condition of the same battery capacity.

[0027] The hub motor involved in the hub motor chassis described in the present invention can be a direct-drive hub motor or a drive reducer hub motor. It can be used in truck chassis with hybrid power or truck chassis requiring large starting torque.

[0028] The drive axle involved in the present invention can be a through-type drive axle or an independent suspension drive axle.

[0029] According to different engineering power requirements, the number of wheel hub motor drive axles can be reasonably increased to form the wheel hub motor chassis of the present invention and form a variety of multi-axle vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the dual-tire four-wheel hub motor arrangement structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the arrangement structure of a single tire four-hub motor of the present invention;

[0033] Figure 3 It is a schematic diagram of the arrangement structure of the dual-wheel hub motor of the present invention;

[0034] Figure 4 It is a schematic diagram of the arrangement structure of the single tire two-hub motor of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the wheel hub motor drive axle of the present invention;

[0036] Figure 6 is a cross-sectional view of the hub motor of Embodiment 1;

[0037] Figure 7 It is an exploded view of the hub motor of Example 1;

[0038] Figure 8 This is a front view of the bridge housing of the present invention;

[0039] Fig. 9 A top view of the bridge housing of the present invention;

[0040] Fig.10 This is an isometric view of the hub motor of Embodiment 1;

[0041] Fig.11 This is a front cross-sectional schematic diagram of the hub motor of Example 1;

[0042] Fig.12 is a three-dimensional schematic diagram of the second flange of the present invention;

[0043] Fig.13 is a cross-sectional view of the second flange of the present invention;

[0044] Fig.14 It is a three-dimensional schematic diagram of the end wheel side shell of the first embodiment;

[0045] Fig.15 It is a cross-sectional view of the wheel side shell at the end of the first embodiment;

[0046] Fig.16 It is a three-dimensional schematic diagram of the middle wheel rim shell of the first embodiment;

[0047] Fig.17 It is a cross-sectional view of the middle wheel rim shell of the first embodiment;

[0048] Fig.18 It is a three-dimensional schematic diagram of the inner wheel rim shell of the first embodiment;

[0049] Fig.19 It is a cross-sectional view of the inner wheel rim shell of the first embodiment;

[0050] Fig. 20 A three-dimensional schematic diagram of a sleeve of an embodiment;

[0051] Fig.21 is a cross-sectional view of a sleeve of an embodiment;

[0052] Fig. 22 It is a cross-sectional view of the wheel hub motor of Embodiment 2;

[0053] Fig.23 This is an exploded view of the wheel hub motor of Embodiment 2;

[0054] Fig.24 This is a schematic structural diagram of the right wheel side housing of the second embodiment;

[0055] Fig.25 It is a cross-sectional view of the right wheel side housing of the second embodiment;

[0056] Fig.26 This is a schematic structural diagram of the left wheel side housing of the second embodiment;

[0057] Fig. 27 It is a cross-sectional view of the left wheel side housing of the second embodiment;

[0058] Fig.28 This is a schematic structural diagram of the planetary disc carrier of Embodiment 2;

[0059] Fig.29 is a cross-sectional view of the planetary disc carrier of Embodiment 2;

[0060] Fig.30 This is a schematic diagram of the structure of the sleeve of Embodiment 2;

[0061] Fig.31 is a cross-sectional view of the sleeve of Embodiment 2;

[0062] In the figure, the bridge housing 01, the half shaft 02, the first flange 03, the second flange 04, the first bearing 05, the second bearing 06, the third bearing 07, the bearing connector 08, the planetary gear reducer 1, the sun gear 11, the planetary gear 12, the ring gear 13, the planetary disc carrier 14, the hub motor 2, the sleeve 21, the stator core 22, the magnet 23, the rotor yoke 24, the motor housing 25, the outer rotor housing 204, the motor end cover 205, the wheel side shell 3, the right wheel side shell 31, the left wheel side shell 32, the end wheel side shell 301, the middle wheel side shell 302, the inner wheel side shell 303, the first wheel hub 41, the second wheel hub 42, the first tire 43, the second tire 44, the wheel hub 401, the tire 402, the first seal 51, the second seal 52, the chassis body 5, and the leaf spring 6. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] Embodiment 1

[0066] like Figure 1-4As shown, this embodiment provides a truck chassis with wheel hub motors, which can be used for hybrid or pure electric trucks, buses, engineering vehicles, etc., including multiple electric drive active axles, with wheel hub motors 2 installed at both ends of the electric drive active axles, including multiple driven axles that cooperate with the electric drive active axles, and also including a suspension structure and a chassis body 5, and the chassis body 5 is composed of longitudinal and transverse beams. The wheel hub motor drives the active axles to be arranged continuously or spaced front and back, and is connected to the vehicle body beam through the suspension to form a truck chassis with multiple wheel hub motors 2 distributed on both sides. The wheel hub motors are installed in the outer wheels on both sides of the chassis, and provide power after being powered on. As an important power source for the whole vehicle, a truck chassis with multiple wheel hub motors distributed on both sides is formed.

[0067] like Figure 5-21 As shown, in this embodiment, the hub motor 2 and the reducer are installed in the wheel, the hub motor 2 is installed on the bridge housing 01, the hub motor 2 is connected to the wheel, and is used to drive the wheel to rotate; the hub motor 2 is connected to a power source through an electric wire, which is used to power the hub motor 2; the wheel is rotatably installed on the bridge housing 01, the bridge housing 01 is located in the middle of the wheel, and a half shaft 02 is also rotatably installed in the bridge housing 01, one end of the half shaft 02 is used to be connected to the engine, and the other end passes through the bridge housing 01 to be connected to the reducer, and the reducer is connected to the wheel, and is used to drive the wheel to rotate.

[0068] In this embodiment, the wheel includes a wheel hub 401, and the wheel hub motor and the reducer are both installed in the wheel hub 401; the wheel hub 401 is connected to a bearing connector 08, and the bearing connector 08 is rotatably installed on the bridge housing 01 through a bearing, and the inner wheel side shell 303 is sleeved on the left side of the bearing connector 08 (the side close to the wheel hub motor). The outer rotor shell 204, the inner wheel side shell 303, the wheel hub 401 and the bearing connector 08 are connected together by the same set of bolts, so that the outer rotor shell 204 directly drives the wheel after the wheel hub motor is powered. The bearing connector 08 is sleeved on the bridge housing 01 through the second bearing 06 and the first bearing 05. The bearing connector 08 plays the role of supporting the outer rotor shell 204, the inner wheel side shell 303 and the wheel hub 401 connected to it, and a tire 402 is installed on the outer side of the wheel hub 401.

[0069] In this embodiment, two active axles are provided, and the two active axles are connected to the chassis body through the suspension structure; two wheel hub motor drive axles are arranged front and rear, and are respectively connected to the beam of the chassis body 5 through leaf springs 6, forming a truck chassis with two front and rear wheel hub motor drive axles.

[0070] In this embodiment, a wheel is installed at both ends of the bridge housing 01 of the active bridge, and the hub motor and the reducer are installed in the wheel; or two wheels are installed at both ends of the bridge housing 01, and the hub motor and the reducer are installed in the wheel hub of the outer wheel; wherein, the inner wheel hub and the outer wheel hub are installed in reverse.

[0071] In this embodiment, the drive axle can form a through-type drive axle, and can also be applied to a drive axle with an independent suspension; the brake can be a drum brake or a disc brake.

[0072] In this embodiment, the hub motor includes a sleeve 21, a stator core 22, a magnet 23, an outer rotor shell 204 and a motor end cover 205; wherein the stator core 22 is connected to the bridge housing 01 through the sleeve 21, the middle wheel side shell 302, the first flange 03 and the second flange 04 to achieve fixation. Specifically, the middle wheel side shell 302 is installed on the inner side of the sleeve 21, and the inner side of the sleeve 21 and the outer side of the middle wheel side shell 302 are correspondingly provided with key grooves, and the two are connected by a flat key; the inner side of the middle wheel side shell 302 is fixedly connected to the bridge housing 01 through a flange; the stator core 22 is sleeved on the outer side of the sleeve 21. The magnet 23 is installed on the outside of the stator core 22 to form a rotor component. Specifically, the magnet 23 is fixed inside the groove on the outside of the stator core 22 through fiber material and resin. The rotor component formed by the stator core 22 and the magnet 23 is sleeved with the outer rotor shell 204, and an air gap of 1 mm to 3 mm is left between the rotor component and the outer rotor shell 204. The motor end cover 205 is fixed to the outer end (the end facing the outer side of the wheel) of the outer rotor shell 204 by bolts. Specifically, the edge of the motor end cover 205 (at a position away from the center of the circle) is provided with bolt holes, and the outer end surface of the outer rotor shell 204 is provided with bolt holes accordingly, and the two are fixedly connected by bolts passing through the bolt holes.

[0073] In this embodiment, two flanges are provided, including a first flange 03 and a second flange 04 which are arranged back to back from the inside to the outside, and the second flange 04 is located on the side close to the outside of the wheel. A gap is provided between the first flange 03 and the second flange 04 for passing the wires; the inner side of the middle wheel side shell 302 and the outer sides of the first flange 03 and the second flange 04 are provided with keyways corresponding to the vehicle, and the middle wheel side shell 302 is connected to the first flange 03 and the second flange 04 by flat keys; the first flange 03 and the second flange 04 are both drilled with radial threaded holes and are fixed to the bridge housing 01 by bolts.

[0074] In this embodiment, a groove is provided on the outer side of the bridge housing 01, so that the wires can enter the hub motor along the groove of the bridge housing 01 through the gap between the first flange 03 and the second flange 04 and enter the wiring harness winding on the stator core 22 of the hub motor to be energized.

[0075] In this embodiment, a wheel side shell is also included, which includes an end wheel side shell 301, an inner wheel side shell 303 and the middle wheel side shell 302 mentioned above. The end wheel side shell 301 is fixed to the inner side of the motor end cover 205 for connecting the reducer. Specifically, a threaded hole is provided in the middle part of the motor end cover (close to the center side), which is connected to the end wheel side shell 301 by bolts; the inner wheel side shell 303 is cylindrical and installed in the outer rotor shell 204. An annular mounting plate is provided at the end facing the inner side of the wheel, and a threaded hole is opened on the mounting plate. An axial threaded hole is correspondingly provided on the inner end surface of the outer rotor shell 204 for bolting with the inner wheel side shell 303, and the inner wheel side shell 303 is fixedly connected to the wheel.

[0076] Furthermore, in order to ensure that the end wheel side shell 301 and the inner wheel side shell 303 rotate relative to the middle wheel side shell 302, the middle wheel side shell 302 is ring-shaped at both ends with the end wheel side shell 301 and the inner wheel side shell 303, and a first seal 51 and a second seal 52 are respectively provided at the ring-shaped position to realize non-contact connection, and the first seal 51 and the second seal 52 can be selected from commonly used sealing rings on the market as needed.

[0077] In this embodiment, the half shaft 02 is rotatably mounted in the bridge housing 01 via the third bearing 07 to achieve power transmission.

[0078] In this embodiment, the reducer is a planetary gear reducer, which is a speed and torque conversion device composed of a sun gear 11, a planetary gear 12 and a ring gear 13, and realizes deceleration through different gear ratios. It includes a sun gear 11, a planetary gear 12, a ring gear 13 and a planetary disc carrier 14; the outer ring of the planetary disc carrier 14 is provided with threaded holes, and the end wheel side shell 301 is correspondingly provided with threaded holes. The planetary disc carrier 14 is fixed to the inner side of the end wheel side shell 301 by bolts, and the end wheel side shell 301 is bolted to the motor end cover 205, and the motor end cover 205 is bolted to the outer rotor shell 204, thereby realizing the fixed connection between the planetary disc carrier 14 and the motor outer rotor shell; A mounting groove is provided on the side of the star plate frame 14 away from the end wheel side shell 301, and a plurality of cylindrical mounting parts are arranged in the mounting groove, and a planetary gear 12 is installed on each mounting part. The inner side of the planetary gear 12 is meshed with the sun gear 11, and the outer side is meshed with the ring gear 13; specifically, the sun gear 11 is installed on the half shaft 02, and is fixedly connected to the half shaft 02 by a flat key, and the inner ring of the ring gear 13 is provided with gear teeth, and the ring gear 13 is located on the side of the second flange 04 facing the outer side of the wheel, and is provided with threaded holes, and is fixedly connected to the second flange 04 by bolts to achieve fixation; at this time, the ring gear 13 is sleeved on the sun gear 11, and a plurality of planetary gears 12 are installed between the two, and the three are meshed and connected.

[0079] The working modes of the present invention are divided into three types:

[0080] 1. Engine drive. The power from the engine is transmitted through the half shaft into the planetary gear reducer for deceleration and torque increase. The power after deceleration and torque increase is transmitted to the wheel hub through the planetary disc frame, end wheel shell, motor end cover, and motor outer rotor in the planetary gear reducer to drive the tire to rotate. In this working mode, when braking, the rotation speed of the stator magnetic field is controlled to be lower than the corresponding speed of the wheel, so that the rotor magnetic field cuts the stator magnetic field, realizing electromagnetic braking and achieving braking energy recovery.

[0081] 2. Pure electric drive. In this working mode, the hub motor generates a magnetic field through the copper wire placed in the stator core, drives the outer rotor shell of the motor to rotate, and directly transmits power to the wheel hub to drive the tire to rotate. In this working mode, when braking, the rotation speed of the stator magnetic field is controlled to be lower than the corresponding speed of the wheel, so that the rotor magnetic field cuts the stator magnetic field, realizing electromagnetic braking and achieving braking energy recovery.

[0082] 3. Hybrid drive: In this working mode, the power from the engine is decelerated and torque increased, and then the wheel hub motor further increases the torque and transmits it to the wheel hub to drive the tire to rotate.

[0083] Embodiment 2

[0084] This embodiment is an improvement on the first embodiment, and the improvement is as follows: Figure 22-31 As shown, in this embodiment, the bridge housing 01 is located in the middle of the wheel; the hub motor 2 is installed on the bridge housing 01, and the hub motor 2 is connected to the reducer. A groove is provided on the outer side of the bridge housing 01 for allowing the wire to pass through to supply power to the hub motor 2; the wheel is rotatably installed on the bridge housing 01, and the reducer is connected to the wheel to drive the wheel to rotate; a half shaft 02 is also rotatably installed in the bridge housing 01, one end of the half shaft 02 is used to be connected to the engine, and the other end passes through the bridge housing 01 and is connected to the reducer.

[0085] In this embodiment, the hub motor includes a sleeve 21, a stator core 22, a magnet 23, a rotor yoke 24 and a motor housing 25; the stator core 22 is sleeved on the outer side of the sleeve 21, and the inner side of the sleeve 21 is fixedly connected to the bridge housing 01 through a flange; the magnet 23 is sleeved on the outer side of the stator core 22, and the magnet 23 is fixed to the inner side of the motor housing 25 through the rotor yoke 24.

[0086] In this embodiment, two flanges are provided, including a first flange 03 and a second flange 04 arranged back to back, and a gap is provided between the first flange and the second flange for allowing the wires to pass through, so that the wires enter the hub motor along the groove of the bridge housing 01 through the gap between the first flange 03 and the second flange 04 for power supply; the inner side of the sleeve 21 and the outer sides of the first flange 03 and the second flange 04 are respectively provided with keyways, and the sleeve 21 is connected to the first flange 03 and the second flange 04 by providing flat keys in the keyways; threaded holes are correspondingly provided on the first flange 03, the second flange 04 and the bridge housing 01, and the first flange 03 and the second flange 04 are fixedly mounted on the bridge housing 01 by bolts.

[0087] In this embodiment, the magnet 23 is fixed inside the groove of the rotor yoke 24 by means of fiber material and resin, and the rotor yoke 24 is fixed inside the motor housing 25 by means of positioning grooves and bolts.

[0088] In this embodiment, the reducer is a planetary gear reducer, including a sun gear 11, a planetary gear 12, a ring gear 13 and a planetary disc carrier 14, which is a speed and torque conversion device composed of the sun gear 11, the planetary gear 12 and the ring gear 13, and realizes deceleration through different gear ratios; threaded holes are correspondingly arranged on the outer edge of the planetary disc carrier 14 and the outer side of the motor housing 25, and the motor housing 25 is connected to the planetary disc carrier 14 by bolts to realize the transmission of power to the planetary gear reducer; a cylindrical mounting portion is arranged on the side of the planetary disc carrier 14 away from the motor housing 25, and the planetary gear 12 is sleeved on the mounting portion; the inner side of the planetary gear 12 is meshed with the sun gear 11, and the outer side is meshed with the ring gear 13, the sun gear 11 is installed on the half shaft, and the ring gear 13 is fixedly connected to the left wheel side housing 32 of the wheel to drive the wheel to rotate; wherein the sun gear is fixedly connected to the half shaft through a flat key, and the half shaft 02 is sleeved in the bridge housing 01 through the third bearing 07 to rotate, so as to realize the transmission of engine power to the planetary gear reducer.

[0089] In this embodiment, the wheel includes a first wheel hub 41 and a second wheel hub 42, and a bearing connector 08 is connected between the first wheel hub 41 and the second wheel hub 42. The bearing connector is rotatably mounted on the bridge housing through a bearing, wherein two bearings are provided, including a first bearing 05 and a second bearing 06 arranged in parallel, and the first bearing 05 and the second bearing 06 are sleeved on the bridge housing 01; the first wheel hub 41 and the second wheel hub 42 are respectively provided with a first tire 43 and a second tire 44.

[0090] In this embodiment, a wheel side shell is also provided in the first wheel hub 41, and the wheel side shell includes a right wheel side shell 31 and a left wheel side shell 32 connected to each other; a cavity is formed in the right wheel side shell 31 and the left wheel side shell 32, and the wheel hub motor and the reducer are installed in the cavity, and the gear ring 13 of the reducer is fixed on the left wheel side shell 32. Among them, the left wheel side shell 32 is provided with two groups of threaded holes, the inner threaded holes are connected to the gear ring 13 in the form of bolts, and the outer threaded holes are connected to the right wheel side shell 31 in the form of bolts; the right wheel side shell 31 is provided with two groups of threaded holes, the left end threaded holes are connected to the left wheel side shell 32 in the form of bolts, and the right end threaded holes are connected to the first wheel hub 41 in the form of bolts; the power reduced by the planetary gear reducer is transmitted to the wheel.

[0091] The working modes of the present invention are divided into three types:

[0092] 1. Engine drive: The power from the engine is transmitted through the half shaft into the planetary gear reducer for deceleration and torque increase. The power after deceleration and torque increase drives the tire to rotate through the planetary gear reducer. In this working mode, when braking, the rotation speed of the stator magnetic field is controlled to be lower than the corresponding speed of the wheel, so that the rotor magnetic field cuts the stator magnetic field, realizing electromagnetic braking and achieving braking energy recovery.

[0093] 2. Pure electric drive: In this working mode, the hub motor generates a magnetic field through the copper wire placed in the stator core, drives the motor's outer rotor (magnet, rotor yoke and motor housing) to rotate, and transmits power to the wheel hub through the reducer to drive the tire to rotate; in this working mode, during braking, the rotation speed of the stator magnetic field is controlled to be lower than the corresponding speed of the wheel, so that the rotor magnetic field cuts the stator magnetic field, realizing electromagnetic braking and achieving braking energy recovery.

[0094] 3. Hybrid drive: When in this working mode, the power from the engine is decelerated and torque increased, and then the wheel hub motor further increases the torque and transmits it to the wheel hub to drive the tire to rotate.

[0095] Embodiment 3

[0096] This embodiment is an improvement on the basis of the first and second embodiments, and the improvement is that: the planetary gear reducer 1 adopts a two-stage planetary gear reducer to perform two-stage reduction; specifically, the sun gear 11, the planetary gear 12, the ring gear 13 and the planetary disc carrier 14 are provided with two groups, and the sun gear 11 of the second-stage planetary gear is installed on the planetary disc carrier 14 of the first-stage planetary gear;

[0097] In the first embodiment, the planetary disc carrier 14 of the first-stage planetary gear is driven by the half shaft 02, and then the sun gear 11 of the second-stage planetary gear is driven to realize two-stage reduction. The planetary disc carrier 14 of the second-stage planetary gear is fixedly connected to the end wheel side shell 301 by bolts.

[0098] In the second embodiment, the motor housing 25 drives the planetary disc carrier 14 of the first-stage planetary gear, and then continues to drive the sun gear of the second-stage planetary gear to achieve two-stage reduction; the planetary disc carrier of the second-stage planetary gear is fixedly connected to the motor housing 25 by bolts.

[0099] Furthermore, the planetary gear reducer 1 can be provided with multiple stages as required.

[0100] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0101] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A truck chassis with a wheel hub motor, comprising a chassis body, a driving axle, a driven axle and a suspension structure; Features: The active axle is connected to the chassis body through the suspension structure, and the active axle is provided with a plurality of roots. The active axle includes an axle housing, and wheels are rotatably mounted at both ends of the axle housing; it also includes a hub motor and a reducer, and the hub motor and the reducer are both mounted in the wheel, and the hub motor is mounted on the axle housing, and the hub motor is connected to the wheel to drive the wheel to rotate; the hub motor is connected to a power source through an electric wire to supply power to the hub motor; a half shaft is also rotatably mounted in the axle housing, and one end of the half shaft is used to be connected to the engine, and the other end passes through the axle housing and is connected to the reducer, and the reducer is connected to the wheel to drive the wheel to rotate; The hub motor comprises a sleeve, a stator core, a magnet, an outer rotor shell and a motor end cover; a middle wheel side shell is installed on the inner side of the sleeve, and the inner side of the sleeve is connected to the outer side of the middle wheel side shell by a flat key; the inner side of the middle wheel side shell is fixedly connected to the bridge shell by a flange; the stator core is sleeved on the outer side of the sleeve, the magnet is installed on the outer side of the stator core to form a rotor component, the outer rotor shell is sleeved on the outer side of the rotor component, and an air gap is left between the outer rotor shell and the rotor component; the motor end cover is fixed to the outer end of the outer rotor shell; It also includes an end wheel side shell and an inner wheel side shell, wherein the end wheel side shell is fixed to the inner side of the motor end cover and is used to connect the reducer; the inner wheel side shell is installed in the outer rotor shell, the end of the inner wheel side shell is fixedly connected to the inner end of the outer rotor shell, and the inner wheel side shell is fixedly connected to the wheel; the end wheel side shell and the inner wheel side shell are respectively sleeved on the two ends of the middle wheel side shell, and a seal is provided at the sleeve joint; The reducer is a planetary gear reducer, comprising a sun gear, a planet gear, a ring gear and a planetary disc carrier; the planetary disc carrier is fixed to the inner side of the end wheel side shell by bolts; a mounting groove is provided on the side of the planetary disc carrier away from the end wheel side shell, a plurality of mounting parts are provided in the mounting groove, and a planetary gear is mounted on each mounting part; the inner side of the planetary gear is meshed with the sun gear, and the outer side is meshed with the ring gear, the sun gear is mounted on the half shaft, and the ring gear is fixedly connected to the flange; A plurality of the active axles are arranged in a front-to-back sequence or at intervals; two active axles are provided, and the two active axles are connected to the chassis body through the suspension structure; the suspension structure adopts leaf springs or independent suspension.

2. The truck chassis with wheel hub motor according to claim 1, Features: The planetary gear reducer adopts a two-stage planetary gear reducer to perform two-stage reduction; The wheel comprises a wheel hub, the wheel hub is connected with a bearing connector, the bearing connector is rotatably mounted on the bridge housing through a bearing, and a tire is mounted on the outer side of the wheel hub; A wheel is installed at both ends of the bridge housing; Alternatively, two wheels are installed at both ends of the bridge housing, and the hub motor and the reducer are installed in the wheel hubs of the outer wheels.

3. The truck chassis with wheel hub motor according to claim 1, Features: A groove is provided on the outer side of the bridge housing for allowing the electric wire to pass through to supply power to the hub motor; two flanges are provided, including a first flange and a second flange arranged back to back from the inside to the outside, and a gap is provided between the first flange and the second flange for allowing the electric wire to pass through; the first flange and the second flange are fixed to the bridge housing by bolts.

4. A truck chassis with a wheel hub motor, comprising a chassis body, a driving axle, a driven axle and a suspension structure; Features: The active axle is connected to the chassis body through the suspension structure, and the active axle is provided with a plurality of roots. The active axle includes an axle housing, and wheels are rotatably mounted at both ends of the axle housing; it also includes a hub motor and a reducer, and the hub motor and the reducer are both mounted in the wheel, and the hub motor is mounted on the axle housing, and the hub motor is connected to the wheel to drive the wheel to rotate; the hub motor is connected to a power source through an electric wire to supply power to the hub motor; a half shaft is also rotatably mounted in the axle housing, and one end of the half shaft is used to be connected to the engine, and the other end passes through the axle housing and is connected to the reducer, and the reducer is connected to the wheel to drive the wheel to rotate; The hub motor comprises a sleeve, a stator core, a magnet, a rotor yoke and a motor housing; the stator core is sleeved on the outer side of the sleeve, and the inner side of the sleeve is fixedly connected to the bridge housing through a flange; the magnet is sleeved on the outer side of the stator core, and the magnet is fixed to the inner side of the motor housing through the rotor yoke; The reducer is a planetary gear reducer, comprising a sun gear, a planet gear, a gear ring and a planetary disc carrier; the outer edge of the planetary disc carrier is connected to the motor housing by bolts; a mounting portion is provided on the side of the planetary disc carrier away from the motor housing, and the planetary gear is sleeved on the mounting portion; the inner side of the planetary gear is meshed with the sun gear, and the outer side is meshed with the gear ring; the sun gear is mounted on the half shaft, and the gear ring is fixedly connected to the wheel; A wheel side shell is also provided in the wheel, and the wheel side shell includes a left wheel side shell and a right wheel side shell connected to each other, the left end of the right wheel side shell is connected to the left wheel side shell, and the right end is connected to the wheel; a cavity is formed in the right wheel side shell and the left wheel side shell, the wheel hub motor and the reducer are both installed in the cavity, and the gear ring of the reducer is fixed on the left wheel side shell; A plurality of the active axles are arranged in a front-to-back sequence or at intervals; two active axles are provided, and the two active axles are connected to the chassis body through the suspension structure; the suspension structure adopts leaf springs or independent suspension.

5. The truck chassis with wheel hub motor according to claim 4, Features: The planetary gear reducer adopts a two-stage planetary gear reducer to perform two-stage reduction; The wheel comprises a wheel hub, the wheel hub is connected with a bearing connector, the bearing connector is rotatably mounted on the bridge housing through a bearing, and a tire is mounted on the outer side of the wheel hub; A wheel is installed at both ends of the bridge housing; Alternatively, two wheels are installed at both ends of the bridge housing, and the hub motor and the reducer are installed in the wheel hubs of the outer wheels.

6. The truck chassis with wheel hub motor according to claim 4, Features: A groove is provided on the outer side of the bridge housing for allowing the electric wire to pass through to supply power to the hub motor; two flanges are provided, including a first flange and a second flange arranged back to back from the inside to the outside, and a gap is provided between the first flange and the second flange for allowing the electric wire to pass through; the first flange and the second flange are fixed to the bridge housing by bolts.

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