Disc hub type integrated automobile hub electric driving device

Abstract

The invention relates to the technical field of automobile hubs, in particular to a disc hub type integrated automobile hub electric driving device which is characterized in that a supporting system of the driving device is in a disc hub type, a motor main shaft penetrates through the two ends of a driving motor along the central axis of the driving device, and the supporting system of the driving device comprises a claw suspension mechanism, the support is used for supporting and protecting the hub motor; the forward protection mechanism is used for fixing the cleat suspension mechanism and facing the hub motor; the reverse protection mechanism is used for providing protection for the hub motor; the driving device is arranged to be in a disc hub type, the appearance of the driving device is miniaturized, meanwhile, sufficient internal space is provided for installing a gearbox, the strength of a hub is effectively improved, the controllability of an automobile during running is effectively improved, meanwhile, the safety of the automobile is improved, and the driving device is suitable for popularization and application. Therefore, the operation efficiency of the automobile electric driving device is effectively improved while the motor is miniaturized.

Description

Technical Field

[0001] The invention relates to the technical field of automobile wheel hubs, and in particular to a disc-hub type integrated automobile wheel hub electric drive device. Background Art

[0002] In recent years, new energy vehicles, especially pure electric vehicles and plug-in hybrid vehicles, have been favored by a large number of consumers. New energy vehicles driven by electric motors have mechanical transmission components such as transmissions, clutches, and drive shafts, which make the chassis structure more complex. The resulting impact is that the passenger space is very small, and the transmission system will cause energy loss while transmitting power through mechanical components, resulting in low energy utilization. With the gradual popularization of new energy vehicles, hub motor technology has also developed to a certain extent.

[0003] At present, the application scope of hub motors is mainly small electric vehicles, such as electric cars, electric bicycles, electric scooters, and special vehicles.

[0004] However, there are still many unresolved issues with hub motors: for example, the hub motor must be installed inside the wheel rim, which increases the sprung mass of the vehicle and is not conducive to handling; the electric braking performance is limited, and a lot of electricity is consumed to maintain the operation of the braking system: due to the limited space, it is very difficult to design a mechanical braking system, and the hub motor works in a harsh environment, facing the influence of water, dust and other factors, and has high requirements for sealing. At the same time, the design also needs to consider the heat dissipation problem separately for the hub motor.

[0005] Chinese patent application publication number: CN116238319A discloses a two-speed variable speed drive wheel hub motor, which is composed of a central shaft, a wheel hub, a brake frame, a wheel hub motor, a planetary frame, an outer gear ring, a long planetary gear, a short planetary gear, a small sun gear, a large sun gear, a first brake, a second brake and a third brake; the wheel hub motor is fixedly connected to the small sun gear as a power input, and the small sun gear, the short planetary gear, the long planetary gear, the outer gear ring and the planetary frame form a gear reduction mechanism to achieve two-stage speed change and power output of the wheel hub motor. The invention has a compact structure, a large transmission torque, and can achieve two-stage speed change output, providing a feasible technical solution for electric vehicle wheel hub motors in terms of large torque transmission and multi-speed transmission, and has good practical value.

[0006] However, the above method has the following problems: the hub motor has poor versatility in automobile hub drive. Summary of the invention

[0007] To this end, the present invention provides a disc hub type integrated automobile wheel hub electric drive device to overcome the problem that the hub type motor in the prior art has poor versatility in automobile wheel hub driving, thereby resulting in reduced efficiency of the electric drive device.

[0008] To achieve the above-mentioned object, the present invention provides a disc-hub type integrated automobile wheel hub electric drive device, the support system of the drive device is disc-hub type, and the motor main shaft passes through both ends of the drive motor along the central axis of the drive device, and the support system of the drive device includes:

[0009] A clevis suspension mechanism is arranged on one side of the hub motor, and a plurality of end fixing holes are arranged at the end of the clevis, and a central fixing hole is arranged at the center, so as to support and protect the hub motor;

[0010] A forward protection mechanism is connected to the horn suspension mechanism and is concentric with the central fixing hole, and is used to fix the horn suspension mechanism and the hub motor.

[0011] A reverse protection mechanism is arranged on a side of the wheel hub motor away from the horn suspension mechanism, and a reverse center hole is provided at the center to provide protection for the wheel hub motor;

[0012] The forward protection mechanism and the reverse protection mechanism form a hub-shaped housing, and a plurality of fixing grooves are arranged in the forward protection mechanism and the reverse protection mechanism to provide installation space for the driving device.

[0013] Furthermore, the transmission system of the driving device is connected by the motor main shaft and includes:

[0014] The motor main shaft passes through the center of the forward protection mechanism and the reverse protection mechanism and is arranged on the central axis of the wheel hub motor to transmit the power of the driving device;

[0015] The brake component is arranged between the forward protection mechanism and the reverse protection mechanism and connected to the motor main shaft, and comprises a brake caliper and a brake disc, and is used to brake the drive device.

[0016] Furthermore, the disc-hub type integrated automobile wheel hub electric drive device comprises:

[0017] A drive motor for providing power to the wheel hub;

[0018] A speed reduction mechanism connected to the driving motor to adjust the rotation speed of the motor;

[0019] A shell wrapped around the reduction mechanism, with a through hole of a preset diameter provided at the geometric center of the side wall, and a plurality of supporting structures provided on the inner wall of the shell for supporting the reduction mechanism;

[0020] A power shaft connected to the driving motor and the speed reduction mechanism, and passing through the housing through the through hole to transmit the power generated by the driving motor;

[0021] An external connection mechanism, connected to the housing, for fixing the hub at a corresponding position;

[0022] A working mechanism connected to the power shaft and used to perform a preset state of work according to the power provided by the drive motor through the power shaft;

[0023] Wherein, the preset caliber is proportional to the diameter of the power shaft, and the speed reduction mechanism is a planetary speed reducer;

[0024] Wherein, the preset state includes running state, braking state and brake state;

[0025] The running state is a state in which the working mechanism runs at a constant speed according to the power provided by the driving motor through the power shaft, the braking state is a state in which the working mechanism runs at a reduced speed by adjusting the power shaft through the reduction mechanism, and the braking state is a state in which the working mechanism stops from the running state or the braking state;

[0026] The parking means that the driving motor and the power shaft do not move.

[0027] Furthermore, the driving motor comprises:

[0028] A motor housing, which is used to provide support for the driving motor and has a through hole at one end;

[0029] A rotor assembly, which is assumed to be inside the motor housing and is capable of rotating along a rotation axis;

[0030] A stator assembly, which is disposed on the motor housing and is coaxial with the rotor assembly to cooperate with the rotor assembly to output power;

[0031] A rotary transformer, which is arranged on the rotor assembly and is used to measure the running speed of the rotor assembly;

[0032] The motor output shaft has one end connected to the rotor assembly and the other end passing through the motor housing from the through hole on the motor housing to output power to the outside of the drive motor.

[0033] Furthermore, the deceleration mechanism comprises:

[0034] A driving shaft connected to the motor output shaft, used to receive the power output by the drive motor and provide power to the speed reduction mechanism, and the driving shaft and the motor output shaft rotate at the same angular velocity;

[0035] A first external gear, which is sleeved on the driving shaft and rotates at the same angular speed as the driving shaft to transmit the power of the driving shaft;

[0036] A plurality of second external gears, which are arranged around the first external gear, and each second external gear is respectively meshed with the first external gear to receive and adjust the angular velocity transmitted by the first external gear;

[0037] an internal gear, which is sleeved outside the second external gears and meshes with the second external gears to receive and transmit the angular velocity transmitted by the second external gears;

[0038] a plurality of third external gears, which are arranged inside the internal gear and mesh with the internal gear, and are used to receive and adjust the angular velocity transmitted by the internal gear;

[0039] A gear frame, which is arranged in the inner gear, and a plurality of third outer gear rotating shafts are arranged in the gear frame for fixing each third outer gear;

[0040] A connecting frame connected to each of the second external gears, and provided with a plurality of second external gear rotating shafts for controlling and adjusting the relative distance between each of the second external gears and the first external gear;

[0041] A driven shaft connected to the gear frame and provided with a speed reduction cover, and the driven shaft rotates coaxially with the gear frame to output power from the speed reduction mechanism;

[0042] Wherein, the connecting frame can rotate along the driving shaft, and the gear frame can rotate along the driving shaft.

[0043] Furthermore, a rotor main shaft support is provided in the motor housing, a rotor component cooperating with the rotary transformer is provided at one end of the main shaft support away from the rotary transformer, and a retaining ring groove is provided on the main shaft support;

[0044] Wherein, the rotor main shaft support is provided with a slot matching the driving shaft to stabilize the posture of the driving shaft.

[0045] Furthermore, a bearing position of the driving shaft is provided at one end of the motor housing close to the driving shaft, so that when the driving shaft rotates along the axis, the axis of the driving shaft can be relatively stationary with respect to the motor housing;

[0046] A bearing seat of the driven shaft is provided at one end of the motor housing close to the driven shaft, so that when the driven shaft rotates along the axis, the axis of the driven shaft can be relatively stationary with the motor housing;

[0047] A mounting step is provided in the motor housing near the rotary transformer for fixing the coil of the rotary transformer;

[0048] Among them, a plurality of steps are arranged between the bearing position of the driving shaft and the bearing position of the driven shaft to prevent the speed reduction mechanism from being damaged due to excessive rotation speed of the driven shaft.

[0049] Furthermore, the motor housing and the outer shell are provided with a reinforcement structure, and the reinforcement structure is in the form of a mesh;

[0050] Wherein, for the motor housing, the reinforcement structure arranged thereon is composed of a plurality of radial edges and a plurality of annular edges with the same cross-section, wherein each radial edge radiates outward from the center of the through hole along the motor housing, and the center of each annular edge is the same as the through hole;

[0051] Wherein, for the shell, the reinforcement structure arranged thereon is a plurality of beams with the same cross-section arranged on the inner wall of the shell, and each beam is arranged vertically.

[0052] Furthermore, the driving shaft is a hollow shaft for connecting with the output shaft of the motor; the driven shaft is a through-length shaft for connecting with the working mechanism and transmitting power;

[0053] Wherein, when the driving shaft is connected to the motor output shaft, one end of the motor output shaft close to the driving shaft penetrates into the driving shaft through a shaft rod, so that the driving shaft and the motor output shaft rotate synchronously at the same angular velocity;

[0054] The driven shaft and the power shaft are rigidly fixed so that the driven shaft and the power shaft rotate synchronously at the same angular velocity.

[0055] Furthermore, the working mechanism is also provided with the brake component, including:

[0056] The brake caliper is connected to the motor housing and is used to brake the motor output shaft in the braking state, or brake the motor output shaft in the braking state;

[0057] The brake disc is provided with a toothed structure and meshes with the toothed structure provided on the driven shaft to brake the driven shaft in the braking state, or to brake the driven shaft in the braking state;

[0058] The external connection mechanism is provided with a first suspension arm, a second suspension arm, a third suspension arm, a support arm and a base;

[0059] Wherein, the base is connected to the housing to stabilize the external connection mechanism;

[0060] The first suspension arm, the second suspension arm and the third suspension arm are provided with bolt holes for connecting with the chassis of the vehicle;

[0061] The support arm is provided with a spring groove for fixing a shock absorbing spring arranged on the automobile.

[0062] Compared with the prior art, the beneficial effect of the present invention lies in that, by setting the drive device as a disc hub type, the appearance of the drive device is miniaturized, sufficient internal space is provided to install the gearbox, and the strength of the wheel hub is effectively improved. While effectively improving the maneuverability of the car during operation, the safety of the vehicle is improved, thereby effectively improving the operating efficiency of the car's electric drive device while miniaturizing the motor.

[0063] Furthermore, by arranging a drive motor, a reduction mechanism, a casing, a power shaft, an external connection mechanism and a working mechanism, the vehicle's drive system and the vehicle structure are simplified, making it easy to change the vehicle structure, and each wheel is driven separately, which can better adapt to various terrains and reduce the difficulty of repair and maintenance. The space available for the chassis is increased, and the layout of the vehicle and the body design are more flexible, thereby effectively improving the operating efficiency of the vehicle's electric drive device.

[0064] Furthermore, by arranging a motor housing, a rotor assembly, a stator assembly, a rotary transformer and a motor output shaft to form a drive motor, the control capability of the motor is effectively improved while the motor is miniaturized, thereby further improving the operating efficiency of the automobile electric drive device.

[0065] Furthermore, by providing a driving shaft, a first external gear, a plurality of second external gears, an internal gear, a plurality of third external gears, a gear frame, a connecting frame and a driven shaft, the speed controllability of the rotating shaft is effectively improved while the speed change gear set is integrated, which effectively reduces the size of the transmission and further improves the operating efficiency of the automobile electric drive device.

[0066] Furthermore, by providing a brake component, braking is performed respectively from the output end of the motor and the output end of the entire wheel hub, which effectively improves the braking efficiency while reducing damage to the motor, thereby further improving the operating efficiency of the automobile electric drive device.

[0067] Furthermore, by attaching the suspension device and the connecting device to the outer shell, the vehicle's drive system and the entire vehicle structure are made simpler, thereby further improving the operating efficiency of the vehicle's electric drive device.

[0068] Furthermore, the wheel hub motor of the present invention has the characteristic of independently driving a single wheel, so whether it is front-wheel drive, rear-wheel drive or four-wheel drive, it can be realized relatively easily, and full-time four-wheel drive is relatively convenient to realize on vehicles driven by wheel hub motors; at the same time, the wheel hub motor can realize differential steering similar to that of tracked vehicles through different rotation speeds of the left and right wheels or even reversal, greatly reducing the turning radius of the vehicle, and almost achieving on-the-spot turning under special circumstances, which is very valuable for applications such as lateral parking and unmanned intelligent drive sliding platform technology, as well as for special vehicles.

[0069] Furthermore, new energy vehicle models mostly use electric drive. Whether it is a pure electric vehicle, a fuel cell electric vehicle, or an extended-range electric vehicle, the hub motor can be used as the main driving force; even for hybrid vehicles, the hub motor can be used as a boost when starting or accelerating sharply. At the same time, many technologies of new energy vehicles, such as brake energy recovery, can also be easily realized in hub motor driven models.

[0070] Furthermore, the use of wheel hub motors significantly reduces energy loss during power transmission. Since this type of electric vehicle reduces the transmission system, it can effectively reduce the vehicle's own weight and reduce energy consumption accordingly. Under the same energy conditions, it can increase the load capacity and enhance the endurance.

[0071] Furthermore, since the transmission system, especially some precious metals, is omitted, a lot of processing time is also saved in production, thereby effectively improving the production efficiency of the entire vehicle.

[0072] Furthermore, the use of wheel hub motors eliminates the speed change system and transmission system, reduces the use of oil, and simplifies subsequent maintenance;

[0073] Furthermore, the hub motor has greater selectivity than traditional power and can drive two-wheel drive vehicles suitable for low-speed, medium- and short-distance transportation in cities and high-performance four-wheel drive vehicles for outdoor sports. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 This is a front view of the disc-hub type integrated automobile wheel hub electric drive device of the present invention;

[0075] Figure 2 This is a rear appearance diagram of the disc-hub type integrated automobile wheel hub electric drive device of the present invention;

[0076] Figure 3 It is a schematic structural diagram of the disc-hub type integrated automobile wheel hub electric drive device of the present invention;

[0077] Figure 4 It is a cross-sectional view of a disc-hub type wheel hub electric drive device according to an embodiment of the present invention;

[0078] Figure 5 It is an exploded schematic diagram of the assembly of the planetary reduction mechanism according to an embodiment of the present invention;

[0079] Among them: 101, drive motor; 102, planetary reduction mechanism; 103, brake system; 104, connecting bridge horn; 105, oil inlet hole; 106, oil drain hole; 1, drive flange; 2, front load end cover; 3, motor housing; 4, rear suspension end cover; 5, stator core; 6, rotor core; 7, rotor main shaft bracket; 8, sun gear rotor shaft; 9, rotary transformer; 10, first bearing; 11, second bearing; 12, planetary carrier output shaft; 13, first Oil seal; 14, second oil seal; 15, third bearing; 16, planet carrier; 17, fourth bearing; 18, inner gear ring; 19, brake disc; 20, ram horn external connection mechanism; 21, planetary gear; 22, planet carrier cover; 23, fifth bearing; 24, stator winding coil; 25, housing bolt; 26, reduction bolt; 27, motor bolt; 28, brake caliper; 29, magnet; 30, rotor cover; 31, planetary reduction mechanism end cover; 32, brake disc and pad. DETAILED DESCRIPTION

[0080] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0081] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0082] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0083] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] The present invention provides a disc-hub type integrated automobile wheel hub electric drive device, wherein the support system of the drive device is disc-hub type, and the motor main shaft passes through both ends of the drive motor along the central axis of the drive device, and the support system of the drive device comprises:

[0085] The horn suspension mechanism is arranged on one side of the wheel hub motor, and the end of the horn is provided with a plurality of end fixing holes, and the center is provided with a central fixing hole, so as to support and protect the wheel hub motor;

[0086] The forward protection mechanism is connected to the horn suspension mechanism and is concentric with the central fixing hole to fix the horn suspension mechanism and the hub motor.

[0087] A reverse protection mechanism is arranged on a side of the wheel hub motor away from the horn suspension mechanism, and a reverse center hole is arranged in the center to provide protection for the wheel hub motor;

[0088] The forward protection mechanism and the reverse protection mechanism form a hub-shaped housing, and a plurality of fixing grooves are arranged in the forward protection mechanism and the reverse protection mechanism to provide installation space for the driving device.

[0089] Specifically, the transmission system of the drive device is connected by the motor main shaft and includes:

[0090] The motor main shaft passes through the center of the forward protection mechanism and the reverse protection mechanism and is arranged on the central axis of the wheel hub motor to transmit the power of the driving device;

[0091] The brake component is arranged between the forward protection mechanism and the reverse protection mechanism and is connected to the motor main shaft. It includes a brake caliper and a brake disc, which is used to brake the drive device.

[0092] The present invention utilizes a disc-hub type drive device to miniaturize the appearance of the drive device while providing sufficient internal space to install a gearbox and effectively improve the strength of the wheel hub, thereby effectively improving the maneuverability of the vehicle during operation and improving the safety of the vehicle, thereby effectively improving the operating efficiency of the automobile electric drive device while miniaturizing the motor.

[0093] It can be understood that the disc-hub type integrated automobile wheel hub drive device based on the above-mentioned support system and transmission system can be driven independently in the operating state.

[0094] In order to better illustrate the present invention, a preferred embodiment of the present invention is specifically described below:

[0095] See also Figure 1 As shown, it is a front appearance diagram of a disc-hub type integrated automobile wheel hub electric drive device of the present invention, based on a disc-hub type integrated automobile wheel hub electric drive device, wherein: the wheel hub electric drive device includes a drive motor 101, a planetary reduction mechanism 102 connected to the drive motor and installed inside the drive motor, and a brake system 103 installed on the external shaft end of the drive motor 101;

[0096] Please cooperate Figure 1 See also Figure 2 As shown, Figure 2 It is the back appearance diagram of the disc-hub type integrated automobile wheel hub electric drive device of the present invention, wherein: the brake system 103 and the parts installed outside the drive motor are connected to the bridge horn 104, and the outer circumferential surface is provided with an oil inlet hole 105 and an oil drain hole 106, and cooling oil can be added to cool and reduce the temperature of the drive motor.

[0097] Among them, the ram horn can effectively improve the rotation performance and reaction strength of the motor. In the present invention, the ram horn arranged here can be used to reduce the vibration of the wheel hub and further miniaturize the wheel hub.

[0098] See also Figure 3 As shown, it is a schematic diagram of the structure of the disc-hub type integrated automobile wheel hub electric drive device of the present invention, based on a disc-hub type integrated automobile wheel hub electric drive device, comprising:

[0099] A drive motor for providing power to the wheel hub;

[0100] A speed reduction mechanism connected to the drive motor to adjust the speed of the motor;

[0101] A housing wrapped around the reduction mechanism, with a through hole of a preset diameter provided at the geometric center of the side wall, and a plurality of supporting structures provided on the inner wall of the housing to support the reduction mechanism;

[0102] A power shaft is connected to the driving motor and the reduction mechanism, and passes through the housing through the through hole to transmit the power generated by the driving motor;

[0103] An external connection mechanism, which is connected to the housing and is used to fix the hub in a corresponding position;

[0104] A working mechanism, which is connected to the power shaft and is used to perform a preset state of work according to the power provided by the driving motor through the power shaft;

[0105] Among them, the preset caliber is proportional to the diameter of the power shaft, and the speed reduction mechanism is a planetary speed reducer;

[0106] Among them, the preset states include running state, braking state and brake state;

[0107] Among them, the running state is a state in which the working mechanism runs at a constant speed according to the power provided by the driving motor through the power shaft, the braking state is a state in which the working mechanism runs at a reduced speed by adjusting the power shaft through the reduction mechanism, and the braking state is a state in which the working mechanism stops from the running state or the braking state;

[0108] Parking means that the drive motor and the power shaft do not move.

[0109] Compared with the prior art, the beneficial effect of the present invention lies in that, by arranging a drive motor, a reduction mechanism, a casing, a power shaft, an external connection mechanism and a working mechanism, the vehicle's drive system and the whole vehicle structure are simplified, the whole vehicle structure can be easily changed, and each wheel is driven separately, which can better adapt to various terrains, reduces the difficulty of repair and maintenance, increases the space available for the chassis, and makes the layout of the whole vehicle and the body design more flexible, thereby effectively improving the operating efficiency of the vehicle's electric drive device.

[0110] Specifically, the drive motor includes:

[0111] A motor housing, which is used to provide support for the drive motor and has a through hole at one end;

[0112] A rotor assembly, which is assumed to be inside the motor housing and is capable of rotating along the shaft;

[0113] The stator assembly is arranged on the motor housing and is coaxial with the rotor assembly to cooperate with the rotor assembly to output power;

[0114] A rotary transformer, which is arranged on the rotor assembly and is used to measure the running speed of the rotor assembly;

[0115] The motor output shaft has one end connected to the rotor assembly and the other end passing through the motor housing from the through hole on the motor housing to output power to the outside of the drive motor.

[0116] The drive motor is composed of a motor housing, a rotor assembly, a stator assembly, a rotary transformer and a motor output shaft. While the control capability of the motor is effectively improved, the motor is miniaturized, thereby further improving the operating efficiency of the vehicle's electric drive device.

[0117] Specifically, the reduction mechanism includes:

[0118] A driving shaft connected to the motor output shaft, used to receive the power output by the drive motor and provide power to the reduction mechanism, and the driving shaft and the motor output shaft rotate at the same angular velocity;

[0119] A first external gear is sleeved on the driving shaft and rotates at the same angular speed as the driving shaft to transmit the power of the driving shaft;

[0120] A plurality of second external gears, which are arranged around the first external gear, and each of the second external gears is respectively meshed with the first external gear to receive and adjust the angular velocity transmitted by the first external gear;

[0121] An internal gear, which is sleeved outside each second external gear and meshes with each second external gear to receive and transmit the angular velocity transmitted by each second external gear;

[0122] a plurality of third external gears, which are arranged inside the internal gear and mesh with the internal gear, and are used to receive and adjust the angular velocity transmitted by the internal gear;

[0123] A gear frame, which is arranged in the internal gear, and a plurality of third external gear rotating shafts are arranged in the gear frame for fixing each third external gear;

[0124] A connecting frame connected to each second external gear, and provided with a plurality of second external gear rotating shafts for controlling and adjusting the relative distance between each second external gear and the first external gear;

[0125] A driven shaft is connected to the gear frame and is provided with a speed reduction cover. The driven shaft rotates coaxially with the gear frame to output power from the speed reduction mechanism.

[0126] Wherein, each second external gear can rotate along the driving shaft.

[0127] By arranging a driving shaft, a first external gear, a plurality of second external gears, an internal gear, a plurality of third external gears, a gear frame, a connecting frame and a driven shaft, the controllability of the rotating shaft speed is effectively improved, and the speed change gear set is integrated, which effectively reduces the size of the transmission and further improves the operating efficiency of the automobile electric drive device.

[0128] Specifically, a rotor main shaft support is provided in the motor housing, and a rotor component cooperating with the rotary transformer is provided at one end of the main shaft support away from the rotary transformer, and the main shaft support is provided with a retaining spring groove;

[0129] Among them, the rotor main shaft bracket is provided with a slot matching the driving shaft to stabilize the posture of the driving shaft.

[0130] Specifically, a bearing position of the driving shaft is provided at one end of the motor housing close to the driving shaft, so that when the driving shaft rotates along the axis, the axis of the driving shaft can be relatively stationary with the motor housing;

[0131] A driven shaft bearing is provided at one end of the motor housing close to the driven shaft, so that when the driven shaft rotates along the axis, the axis of the driven shaft can be relatively stationary with the motor housing;

[0132] An installation step is provided in the motor housing near the rotary transformer to fix the coil of the rotary transformer;

[0133] Among them, a limited step is provided between the bearing position of the driving shaft and the bearing position of the driven shaft to prevent the speed reduction mechanism from being damaged due to excessive rotation speed of the driven shaft.

[0134] Specifically, a reinforcement structure is provided on the motor housing and the outer shell, and the reinforcement structure is in the form of a mesh;

[0135] It can be understood that the mesh structure can provide additional strength for the object, which forms a beam-slab structure in structure, and can improve the overall strength of the shell by improving the strength of the intersection points of the mesh structure;

[0136] Wherein, for the motor housing, the reinforcement structure arranged thereon is composed of a plurality of radial edges and a plurality of annular edges of the same cross-section, wherein each radial edge radiates outward from the center of the through hole along the motor housing, and the center of each annular edge is the same as the through hole;

[0137] It can be understood that the shape of the edge cross section can be any closed polygon, and each edge can be arranged inside the shell shape to reduce the actual volume of the shell.

[0138] Among them, for the outer shell, the reinforcement structure arranged thereon is a plurality of beams with the same cross-section arranged on the inner wall of the outer shell, and each beam is arranged vertically.

[0139] It is understood that the shape of the beam cross section can be any rectangular shape, and the beam can extend to the inner wall of the shell.

[0140] Specifically, a material reduction hole is provided on the motor housing to discharge the lubricant in the motor under braking;

[0141] The outer shell is provided with a material reduction groove for discharging the lubricant in the reduction mechanism under the braking state.

[0142] It can be understood that during the deceleration process, the internal pressure of the motor increases, so during the braking process, the lubricating oil in the motor can flow out from the reduction hole; similarly, during the braking process, the pressure in the deceleration mechanism will also increase, and the lubricating oil therein can also be discharged.

[0143] Specifically, the driving shaft is a hollow shaft, which is used to connect with the motor output shaft; the driven shaft is a through-length shaft, which is used to connect with the working mechanism and transmit power;

[0144] When the driving shaft is connected to the motor output shaft, the end of the motor output shaft close to the driving shaft penetrates into the driving shaft through the shaft rod, so that the driving shaft and the motor output shaft rotate synchronously at the same angular velocity;

[0145] The driven shaft and the power shaft are rigidly fixed so that the driven shaft and the power shaft rotate synchronously at the same angular velocity.

[0146] In practice, the rigid fixation can be performed by riveting, welding, or fixing using a slot.

[0147] Specifically, the working mechanism is also provided with a brake component, including:

[0148] A brake caliper connected to the motor housing to brake the motor output shaft in a braking state, or to brake the motor output shaft in a braking state;

[0149] Brake disc The brake disc is provided with a toothed structure and meshes with the toothed structure provided on the driven shaft to brake the driven shaft in a braking state, or to brake the driven shaft in a braking state.

[0150] It is understandable that braking at both the power source and the final drive can effectively reduce the wear of a single brake pad and improve braking efficiency.

[0151] Specifically, the housing is provided with an external connection mechanism for connecting the wheel hub to the vehicle;

[0152] Wherein, the external connection mechanism is provided with a first suspension arm, a second suspension arm, a third suspension arm, a support arm and a base;

[0153] Wherein, the base is connected to the housing to stabilize the external connection mechanism;

[0154] The first suspension arm, the second suspension arm and the third suspension arm are provided with bolt holes for connecting with the chassis of the automobile;

[0155] The support arm is provided with a spring groove position for fixing a shock absorbing spring arranged on the automobile.

[0156] In practice, the shock absorption of a car is accomplished by a number of springs. For a shock absorbing device corresponding to a single wheel hub, the more connection points it has, the stronger the shock absorption effect is.

[0157] The wheel hub motor of the present invention has the characteristic of independent driving of a single wheel, so whether it is front-wheel drive, rear-wheel drive or four-wheel drive, it can be realized relatively easily, and full-time four-wheel drive is relatively convenient to realize on vehicles driven by wheel hub motors; at the same time, the wheel hub motor can realize differential steering similar to that of tracked vehicles through different rotation speeds of the left and right wheels or even reversal, greatly reducing the turning radius of the vehicle, and almost realizing on-the-spot turning under special circumstances, which is very valuable for applications such as lateral parking and unmanned intelligent drive sliding platform technology, as well as for special vehicles.

[0158] Please cooperate Figure 1 See also Figure 4 As shown, it is a cross-sectional view of a disc hub type wheel hub electric drive device according to an embodiment of the present invention, wherein:

[0159] The drive motor 101 includes a motor housing 3, a front load end cover 2, a rear suspension end cover 4, and a stator assembly and a rotor assembly installed inside the drive motor 101;

[0160] The stator assembly includes a stator core 5 and a stator winding coil 24, and the rotor assembly includes a rotor core 6 and a rotor main shaft support 7;

[0161] Among them, the rotor core body 6 is formed by stacking rotor punchings, with magnetic steel 29 embedded inside. The rotor core body 6 is mounted on the rotor main shaft bracket 7. A limiting platform step is provided at one end of the rotor main shaft bracket 7, and the step plane is in contact with one side of the rotor core body 6. The other end of the rotor main shaft bracket 7 is fixed to the rotor core body 6 on the rotor main shaft bracket 7 by a rotor cover 30 through eight M6 shell bolts 25.

[0162] The radial surface of the rotor main shaft bracket 7 is provided with a material reduction hole, and the center has a round through hole that is interference fit with the sun gear rotor shaft 8 in the planetary reduction mechanism 102. Furthermore, the axial surface of the sun gear rotor shaft 8 and the inner circular surface of the center hole of the rotor main shaft bracket 7 are provided with mutually matching pin key grooves, and the sun gear rotor shaft 8 and the rotor main shaft bracket 7 are restricted and fixed by two pin keys. The rotor part of the rotary transformer 9 is installed on the round table surface at the tail end of the rotor main shaft bracket 7, and a retaining spring groove is provided to install the retaining spring to fix it.

[0163] Please cooperate Figure 2 See also Figure 4 As shown, where:

[0164] The front load end cover 2 is also provided with bearing positions for mounting the third bearing 15 and the fourth bearing 17. The inner circumferential surface of the front load end cover 2 is provided with 12 concave and convex circular surface steps for mounting the planetary reduction mechanism 102. The inner gear ring 18 is embedded in the concave and convex groove of the front load end cover 2. Four planetary gears 21 are installed in the planetary carrier 16 and covered by the planetary carrier cover 22. The planetary gears, the inner gear ring and the sun gear rotor shaft are meshed with each other. The planetary reduction mechanism 102 is embedded in the concave circular surface step of the front load end cover 2, and the other side is fixed by the planetary reduction end cover 31. The end cover is provided with 12 screw holes and 12 M6 screws are used to fix it to the front load end cover 2. The planetary reduction end cover 31 is provided with a bearing position for mounting the fifth bearing 23. The first oil seal 13 and the second oil seal 14 are provided at both ends of the planetary reduction mechanism 102. At this point, the planetary reduction mechanism 102 forms a separate and sealed independent mechanism. The front load end cover is provided with an oil filling hole, and the mechanism is cooled and lubricated by injecting special gearbox lubricating oil. The planet carrier 16 and the planet carrier output shaft 12 are interference fit, and the motor planet carrier output shaft 12 rotates in cooperation with the third bearing 15, the fourth bearing 17 and the second bearing 11. The front end of the planet carrier output shaft 12 has a spline and is meshed with the drive flange 1. The brake disc 19 and the drive flange 1 are fixed by the speed reduction bolt 26, and the brake caliper 28 is installed in the boss threaded hole of the front load end cover. The outer cylindrical surface of the rear suspension end cover is provided with a threaded connection hole of the clevis external connection mechanism 20, and the parts connecting the bridge clevis are installed and fixed so that it is assembled and connected to the suspension system of the car.

[0165] See also Figure 4 and Figure 5 As shown, Figure 5It is an exploded diagram of the assembly of the planetary reduction mechanism of an embodiment of the present invention. In practice, the motor housing and the front and rear suspension end covers are provided with material reduction holes or material reduction recesses on the basis of ensuring the firm strength of the overall structure of the motor, which can further reduce the overall mass of the motor.

[0166] Among them, the front end of the planetary carrier output shaft 12 is provided with an external thread, and the brake disc 19 is locked by a nut and a retaining ring. The brake disc 19 rotates synchronously with the driving flange 1 and the planetary carrier output shaft 12.

[0167] In addition to the interference fit between the planet carrier 16 and the planet carrier output shaft 12 , a hot pressing welding process may be performed first to prevent the planet carrier output shaft 12 and the planet carrier 16 from rotating and slipping.

[0168] It can be understood that when the drive motor 101 is working, the rotating magnetic field generated after the stator assembly is powered drives the rotor assembly to rotate synchronously, and then drives the sun gear rotor shaft 8 to rotate synchronously. The rotation of the sun gear rotor shaft 8 drives the meshing planetary gears to make circular motion along the meshing inner gear rings, and the planetary gear reduction mechanism 102 with a fixed reduction ratio decelerates and increases the torque, and then outputs it to the planet carrier 16. The planet carrier 16 outputs the kinetic energy after deceleration and torque increase to the planet carrier output shaft 12, thereby outputting the kinetic energy to the steel rim tire of the automobile wheel to realize the driving of the automobile. When braking, the brake disc brake pad 32 in the brake caliper 28 fixed on the front load end cover 2 of the motor is forced to contact the brake disc 19 to complete the braking stop by friction, and when reversing, it is achieved by the reverse rotation of the drive motor 101.

[0169] Please continue reading Figure 1-Figure 5 As shown, preferably, the planetary reduction mechanism 102 is located in the concave-convex circular surface of the front load end cover 2, forming an independent sealed space, and the mechanism is cooled and lubricated by injecting special gearbox lubricating oil, which further reduces the movement noise of the planetary reduction mechanism 102, reduces the temperature rise and prolongs the service life of the planetary reduction mechanism 102. The independent planetary reduction mechanism 102 makes assembly and maintenance simpler and more procedural;

[0170] The outer end surface of the rear suspension end cover 4 is provided with reinforcing ribs to strengthen the main structure of the motor. The motor housing 3 and the front load end cover 2 and the rear suspension end cover 4 are fixed by 18 M8 motor bolts 27, and sealant is injected between the contact surfaces to improve the protection level to IP68.

[0171] The inner surface of the rear suspension end cover 4 is provided with a bearing position for installing the bearing 10 and an installation position for the encoder coil of the rotary transformer 9. The inner surface of the rear suspension end cover 4 is also provided with a bearing position for installing the second bearing 11. Limiting steps are provided between each bearing position to ensure that the bearings can move independently without interfering with each other.

[0172] Most new energy vehicle models use electric drive. Whether it is a pure electric vehicle, a fuel cell electric vehicle, or an extended-range electric vehicle, the hub motor can be used as the main driving force; even for hybrid vehicles, the hub motor can be used as a booster when starting or accelerating sharply. At the same time, many technologies of new energy vehicles, such as brake energy recovery, can also be easily realized on hub motor driven models.

[0173] The use of wheel hub motors greatly reduces energy loss during power transmission. Since this type of electric vehicle reduces the transmission system, it can effectively reduce the vehicle's own weight and reduce energy consumption accordingly. Under the same energy conditions, it can increase the load capacity and enhance the endurance.

[0174] Since the transmission system, especially some precious metals, is omitted, a lot of processing time is also saved in production, thereby effectively improving the production efficiency of the entire vehicle.

[0175] The use of wheel hub motors eliminates the need for a speed change system and a transmission system, reduces the use of oil, and makes subsequent maintenance simple;

[0176] The hub motor has greater selectivity than traditional power and can drive two-wheel drive vehicles suitable for low-speed, medium- and short-distance transportation in cities and high-performance four-wheel drive vehicles for outdoor sports.

[0177] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0178] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A disc-hub type integrated automobile wheel hub electric drive device, characterized in that: The support system of the drive device is a disc hub type, and the motor main shaft passes through both ends of the drive motor along the central axis of the drive device. The support system of the drive device includes: The horn suspension mechanism is arranged on one side of the wheel hub motor, and the end of the horn is provided with a plurality of end fixing holes, and the center is provided with a central fixing hole, so as to support and protect the wheel hub motor; A forward protection mechanism is connected to the horn suspension mechanism and is concentric with the central fixing hole, and is used to fix the horn suspension mechanism and the hub motor. A reverse protection mechanism is arranged on a side of the wheel hub motor away from the horn suspension mechanism, and a reverse center hole is provided at the center to provide protection for the wheel hub motor; The forward protection mechanism and the reverse protection mechanism form a hub-shaped housing, and a plurality of fixing grooves are arranged in the forward protection mechanism and the reverse protection mechanism to provide installation space for the driving device.

2. The disc-hub integrated automobile wheel hub electric drive device according to claim 1, characterized in that: The transmission system of the driving device is connected by the motor main shaft and includes: The motor main shaft passes through the center of the forward protection mechanism and the reverse protection mechanism and is arranged on the central axis of the wheel hub motor to transmit the power of the driving device; The brake component is arranged between the forward protection mechanism and the reverse protection mechanism and connected to the motor main shaft, and comprises a brake caliper and a brake disc, and is used to brake the drive device.

3. The disc-hub integrated automobile wheel hub electric drive device according to claim 2, characterized in that: include: A drive motor for providing power to the wheel hub; A speed reduction mechanism connected to the driving motor to adjust the rotation speed of the motor; A shell wrapped around the reduction mechanism, with a through hole of a preset diameter provided at the geometric center of the side wall, and a plurality of supporting structures provided on the inner wall of the shell for supporting the reduction mechanism; A power shaft connected to the driving motor and the speed reduction mechanism, and passing through the housing through the through hole to transmit the power generated by the driving motor; An external connection mechanism, connected to the housing, for fixing the hub at a corresponding position; A working mechanism connected to the power shaft and used to perform a preset state of work according to the power provided by the drive motor through the power shaft; Wherein, the preset caliber is proportional to the diameter of the power shaft, and the speed reduction mechanism is a planetary speed reducer; Wherein, the preset state includes running state, braking state and brake state; The running state is a state in which the working mechanism runs at a constant speed according to the power provided by the driving motor through the power shaft, the braking state is a state in which the working mechanism runs at a reduced speed by adjusting the power shaft through the reduction mechanism, and the braking state is a state in which the working mechanism stops from the running state or the braking state; The parking means that the driving motor and the power shaft do not move.

4. The disc-hub integrated automobile wheel hub electric drive device according to claim 3, characterized in that: The drive motor comprises: A motor housing, which is used to provide support for the driving motor and has a through hole at one end; A rotor assembly, which is assumed to be inside the motor housing and is capable of rotating along a rotation axis; A stator assembly, which is disposed on the motor housing and is coaxial with the rotor assembly to cooperate with the rotor assembly to output power; A rotary transformer, which is arranged on the rotor assembly and is used to measure the running speed of the rotor assembly; The motor output shaft has one end connected to the rotor assembly and the other end passing through the motor housing from the through hole on the motor housing to output power to the outside of the drive motor.

5. The disc-hub integrated automobile wheel hub electric drive device according to claim 4, characterized in that: The deceleration mechanism comprises: A driving shaft connected to the motor output shaft, used to receive the power output by the drive motor and provide power to the speed reduction mechanism, and the driving shaft and the motor output shaft rotate at the same angular velocity; A first external gear, which is sleeved on the driving shaft and rotates at the same angular speed as the driving shaft to transmit the power of the driving shaft; A plurality of second external gears, which are arranged around the first external gear, and each second external gear is respectively meshed with the first external gear to receive and adjust the angular velocity transmitted by the first external gear; an internal gear, which is sleeved outside the second external gears and meshes with the second external gears to receive and transmit the angular velocity transmitted by the second external gears; a plurality of third external gears, which are arranged inside the internal gear and mesh with the internal gear, and are used to receive and adjust the angular velocity transmitted by the internal gear; A gear frame, which is arranged in the inner gear, and a plurality of third outer gear rotating shafts are arranged in the gear frame for fixing each third outer gear; A connecting frame connected to each of the second external gears, and provided with a plurality of second external gear rotating shafts for controlling and adjusting the relative distance between each of the second external gears and the first external gear; A driven shaft connected to the gear frame and provided with a speed reduction cover, and the driven shaft rotates coaxially with the gear frame to output power from the speed reduction mechanism; Wherein, the connecting frame can rotate along the driving shaft, and the gear frame can rotate along the driving shaft.

6. The disc-hub integrated automobile wheel hub electric drive device according to claim 5, characterized in that: A rotor spindle support is provided in the motor housing, a rotor component cooperating with the rotary transformer is provided at one end of the spindle support away from the rotary transformer, and a retaining ring groove is provided on the spindle support; Wherein, the rotor main shaft support is provided with a slot matching the driving shaft to stabilize the posture of the driving shaft.

7. The disc-hub integrated automobile wheel hub electric drive device according to claim 6, characterized in that: A bearing position of the driving shaft is provided at one end of the motor housing close to the driving shaft, so that when the driving shaft rotates along the axis, the axis of the driving shaft can be relatively stationary with the motor housing; A bearing seat of the driven shaft is provided at one end of the motor housing close to the driven shaft, so that when the driven shaft rotates along the axis, the axis of the driven shaft can be relatively stationary with the motor housing; A mounting step is provided in the motor housing near the rotary transformer for fixing the coil of the rotary transformer; Among them, a plurality of steps are arranged between the bearing position of the driving shaft and the bearing position of the driven shaft to prevent the speed reduction mechanism from being damaged due to excessive rotation speed of the driven shaft.

8. The disc-hub integrated automobile wheel hub electric drive device according to claim 7, characterized in that: The motor housing and the outer shell are provided with a reinforcement structure, and the reinforcement structure is in the form of a mesh; Wherein, for the motor housing, the reinforcement structure arranged thereon is composed of a plurality of radial edges and a plurality of annular edges with the same cross-section, wherein each radial edge radiates outward from the center of the through hole along the motor housing, and the center of each annular edge is the same as the through hole; Wherein, for the shell, the reinforcement structure arranged thereon is a plurality of beams with the same cross-section arranged on the inner wall of the shell, and each beam is arranged vertically.

9. The disc-hub integrated automobile wheel hub electric drive device according to claim 5, characterized in that: The driving shaft is a hollow shaft, which is used to be connected to the output shaft of the motor; the driven shaft is a through-length shaft, which is used to be connected to the working mechanism and transmit power; Wherein, when the driving shaft is connected to the motor output shaft, one end of the motor output shaft close to the driving shaft penetrates into the driving shaft through a shaft rod, so that the driving shaft and the motor output shaft rotate synchronously at the same angular velocity; The driven shaft and the power shaft are rigidly fixed so that the driven shaft and the power shaft rotate synchronously at the same angular velocity.

10. The disc-hub integrated automobile wheel hub electric drive device according to claim 3, characterized in that: The working mechanism is also provided with the brake component, including: The brake caliper is connected to the motor housing and is used to brake the motor output shaft in the braking state, or brake the motor output shaft in the braking state; The brake disc is provided with a toothed structure and meshes with the toothed structure provided on the driven shaft to brake the driven shaft in the braking state, or brake the driven shaft in the braking state; The external connection mechanism is provided with a first suspension arm, a second suspension arm, a third suspension arm, a support arm and a base; Wherein, the base is connected to the housing to stabilize the external connection mechanism; The first suspension arm, the second suspension arm and the third suspension arm are provided with bolt holes for connecting with the chassis of the vehicle; The support arm is provided with a spring groove for fixing a shock absorbing spring arranged on the automobile.

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