Wheel hub motor wheel with wheel-mounted electric control hydraulic power-assisted clutch device and speed change method
阅读说明：本技术 具有轮载电控液压助力离合装置的轮毂电机轮及变速方法 (Wheel hub motor wheel with wheel-mounted electric control hydraulic power-assisted clutch device and speed change method ) 是由 张文俊 陈庆樟 吴文叶 高琳琳 王耀 王尚 于 2020-06-16 设计创作，主要内容包括：本发明公开了一种具有轮载电控液压助力离合装置的轮毂电机轮包括轮毂电机、轮毂和轮胎,轮载电控液压助力离合装置包括轮胎外沿离合片、环带式离合片支撑骨架、环带式离合片、液压伸缩杆和弹簧组,液压伸缩杆连接于轮毂电机的转子和环带式离合片支撑骨架之间,环带式离合片支撑骨架呈环状与轮毂电机的转子同轴布置,环带式离合片支撑骨架与轮毂电机的转子之间连接弹簧组,环带式离合片支撑骨架固定连接环带式离合片,轮毂固定连接轮胎外沿离合片。本发明还公开了变速方法,由电控单元根据刹车信号传感器、转向信号传感器和车速传感器计算电磁阀通断时间,电磁阀控制液压伸缩杆的伸缩。本发明实时控制轮毂电机轮转动惯量,操控性好。(The invention discloses a wheel hub motor wheel with a wheel-mounted electric-control hydraulic power-assisted clutch device, which comprises a wheel hub motor, a wheel hub and a tire, wherein the wheel-mounted electric-control hydraulic power-assisted clutch device comprises a tire outer edge clutch plate, an annular belt type clutch plate supporting framework, an annular belt type clutch plate, a hydraulic telescopic rod and a spring set, the hydraulic telescopic rod is connected between a rotor of the wheel hub motor and the annular belt type clutch plate supporting framework, the annular belt type clutch plate supporting framework is arranged coaxially with the rotor of the wheel hub motor, the spring set is connected between the annular belt type clutch plate supporting framework and the rotor of the wheel hub motor, the annular belt type clutch plate supporting framework is used for fixing a connecting ring belt type clutch plate, and the wheel hub is fixedly connected. The invention also discloses a speed change method, the on-off time of the electromagnetic valve is calculated by the electric control unit according to the brake signal sensor, the steering signal sensor and the vehicle speed sensor, and the electromagnetic valve controls the extension of the hydraulic telescopic rod. The invention controls the rotational inertia of the wheel of the hub motor in real time and has good controllability.)
1. A wheel hub motor wheel with a wheel-mounted electric-control hydraulic power-assisted clutch device is characterized by comprising a wheel hub motor, a wheel hub, a tire and the wheel-mounted electric-control hydraulic power-assisted clutch device, wherein the tire is rigidly connected with the wheel hub, the wheel-mounted electric-control hydraulic power-assisted clutch device is connected between the wheel hub and a rotor of the wheel hub motor, the wheel-mounted electric-control hydraulic power-assisted clutch device comprises a clutch plate on the outer edge of the tire, an annular belt type clutch plate supporting framework, an annular belt type clutch plate, a hydraulic telescopic rod and a spring set, the hydraulic telescopic rod is arranged in a radially telescopic manner in the tire, one end of the hydraulic telescopic rod is fixedly connected with the peripheral surface of the outer side of the rotor of the wheel hub motor, the other end of the hydraulic telescopic rod is fixedly connected with the peripheral surface of an inner ring of the annular belt type clutch plate supporting framework, and the annular belt, the annular belt type clutch plate supporting framework is connected with the spring group between the rotors of the hub motor, the annular belt type clutch plate is fixedly connected with the outer ring peripheral surface of the annular belt type clutch plate supporting framework, the inner ring peripheral surface of the hub is fixedly connected with the outer edge clutch plate of the tire, and the outer edge clutch plate of the tire is in friction engagement or separation with the annular belt type clutch plate.
2. The wheel hub motor with the wheel-mounted electrically-controlled hydraulically-assisted clutch device according to claim 1, wherein the outer circumferential surface of the rotor of the wheel hub motor is provided with a plurality of axially spaced annular grooves, and the hydraulically telescopic rods are fixedly connected in the annular grooves.
3. The wheel hub motor with the wheel-mounted electrically-controlled hydraulically-assisted clutch device according to claim 2, wherein the side surface of the inner ring of the ring-belt type clutch plate supporting framework is provided with a limiting flange which is matched with the annular groove, and the limiting flange is arranged at the outer sides of the two side walls of the annular groove.
4. The wheel hub motor with the wheel-mounted electrically-controlled hydraulically-assisted clutch device according to claim 2, wherein the spring sets are disposed in one of the annular grooves on both axial sides of the hydraulically telescopic rod.
5. The wheel hub motor with the wheel-mounted electrically-controlled hydraulically-assisted clutch device according to claim 2, wherein the spring set is disposed at a position spaced apart from adjacent ones of the annular grooves.
6. The wheel hub motor with the wheel-mounted electric-control hydraulic power-assisted clutch device as claimed in claim 1, characterized by comprising an electric-control hydraulic system, wherein the electric-control hydraulic system comprises a signal collecting device, an electric control unit and a solenoid valve, the electric control unit is connected with the signal collecting device and the solenoid valve, the solenoid valve is used for controlling the hydraulic telescopic rod, and the signal collecting device comprises a brake signal sensor, a steering signal sensor and a vehicle speed sensor.
7. A speed change method of a wheel hub motor with a wheel-mounted electric-control hydraulic power-assisted clutch device is characterized in that the speed change method is carried out on the basis of the wheel hub motor with the wheel-mounted electric-control hydraulic power-assisted clutch device in claim 6, and comprises the steps that an electric control unit calculates the on-off time of an electromagnetic valve according to a brake signal sensor, a steering signal sensor and a vehicle speed sensor, and the electromagnetic valve controls the telescopic state time of a hydraulic telescopic rod to control the speed change of the wheel.
Technical Field
The invention relates to a wheel hub motor wheel and a speed change method, in particular to a wheel hub motor wheel with a wheel load electric control hydraulic power-assisted clutch device and a speed change method.
Background
In the running process of the hub motor electric automobile, a driver controls the wheel speed by controlling the voltage distributed to the hub motor, so that the running speed of the hub motor electric automobile is controlled, or the wheel speed of the hub motor is controlled by a brake system. In the speed change process (speed reduction process), the vehicle-mounted power supply power system is required to accurately and timely distribute enough voltage to each hub motor, and the hub motor electric automobile is guaranteed to realize timely and accurate speed change operation. Ideal wheel speed manipulation must satisfy the condition:
namely, it is
Wherein
Compared with the traditional automobile, the hub motor electric automobile has the advantages that the sprung mass is reduced, and meanwhile, the unsprung mass is increased. The mass increment is mainly concentrated on the hub motor, and the wheel of the hub motor electric automobile is 8-10 times of that of the traditional wheel. The mass increment σ m results in the moment of inertia J of the in-wheel motor (including the wheel hub) with reference to the axleZIncreases (refer to the above equation), which in turn results in a decrease in the efficiency of the wheel speed change (i.e., alpha angular acceleration). The vehicle speed response is inefficient, and the controllability of the hub motor electric vehicle is greatly influenced.
Chinese patent CN209767307U, the scheme discloses a two-gear speed change system of an internal rotor hub motor without power interruption, which mainly comprises an internal rotor hub motor, fastening screws No. 1, a transmission annular shell, a knuckle, fastening screws No. 2, a transmission right side shell, fastening screws No. 3, electromagnetic brake No. 1, a first planetary gear train, a one-way clutch, electromagnetic brake No. 2, a second planetary gear train, a tire, a rim bolt, a rim nut, a hub, a round nut, a brake disc, a brake caliper and brake caliper fastening screws. The speed change mechanism between the motor nail and the rotor realizes the gear shift speed change of the wheel under the control of the electromagnetic clutch. The scheme mainly changes the rotating speed ratio through the speed change mechanism to achieve the effect of wheel speed change, the improvement on the corresponding efficiency of the vehicle speed is not obvious, and the controllability of the hub motor electric vehicle cannot be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the wheel hub motor wheel with the wheel load electric control hydraulic power-assisted clutch device, and solves the problems of low wheel speed change efficiency and poor controllability caused by large rotational inertia of the wheel hub motor. The invention also provides a speed change method of the wheel hub motor with the wheel-mounted electric control hydraulic power-assisted clutch device.
The technical scheme of the invention is as follows: a wheel hub motor wheel with a wheel-mounted electric-control hydraulic power-assisted clutch device comprises a wheel hub motor, a wheel hub, a tire and the wheel-mounted electric-control hydraulic power-assisted clutch device, wherein the tire is rigidly connected with the wheel hub, the wheel-mounted electric-control hydraulic power-assisted clutch device is connected between the wheel hub and a rotor of the wheel hub motor, the wheel-mounted electric-control hydraulic power-assisted clutch device comprises a clutch plate, a girdle band type clutch plate supporting framework, a girdle band type clutch plate, a hydraulic telescopic rod and a spring set, the hydraulic telescopic rod is arranged in a radial telescopic manner of the tire, one end of the hydraulic telescopic rod is fixedly connected with the peripheral surface of the outer side of the rotor of the wheel hub motor, the other end of the hydraulic telescopic rod is fixedly connected with the peripheral surface of an inner ring of the girdle band type clutch plate supporting framework, and the girdle band type clutch plate supporting framework is, the annular belt type clutch plate supporting framework is connected with the spring group between the rotors of the hub motor, the annular belt type clutch plate is fixedly connected with the outer ring peripheral surface of the annular belt type clutch plate supporting framework, the inner ring peripheral surface of the hub is fixedly connected with the outer edge clutch plate of the tire, and the outer edge clutch plate of the tire is in friction engagement or separation with the annular belt type clutch plate.
Furthermore, a plurality of annular grooves which are axially arranged at intervals are formed in the peripheral surface of the outer side of a rotor of the hub motor, and the hydraulic telescopic rod is fixedly connected into the annular grooves.
Furthermore, the side surface of the inner ring of the ring-belt type clutch plate supporting framework is provided with a limiting flange matched with the annular groove, and the limiting flange is arranged on the outer sides of the two side walls of the annular groove.
Further, the spring sets are arranged on two axial sides of the hydraulic telescopic rod in one annular groove.
Further, the spring set is arranged at a position spaced between the adjacent annular grooves.
Further, including automatically controlled hydraulic system, automatically controlled hydraulic system includes signal collection device, electrical unit and solenoid valve, electrical unit with signal collection device reaches the solenoid valve is connected, the solenoid valve is used for controlling hydraulic telescoping rod, signal collection device includes brake signal sensor, turn signal sensor and speed of a motor vehicle sensor.
The wheel speed change method of the hub motor with the wheel-mounted electric control hydraulic power-assisted clutch device comprises the steps that an electric control unit calculates the on-off time of an electromagnetic valve according to a brake signal sensor, a steering signal sensor and a vehicle speed sensor, and the electromagnetic valve controls the telescopic state time of a hydraulic telescopic rod to control the speed change of a wheel.
The technical scheme provided by the invention has the advantages that:
the clutch plate and the annular belt type clutch plate on the outer edge of the tire are in clutch motion through the action of the hydraulic telescopic rod, so that the real-time rotational inertia of the tire of the whole hub motor is controlled, and the change control of the real-time rotational inertia of the tire is beneficial to improving the speed change rate of the wheel; the clutch structure is arranged between the rotor and the tire, the structure is simple and compact, the torque transmission is direct and efficient, and compared with the change of the rotor and stator structures of the hub motor or the in-wheel complex transmission structure, the clutch structure is simple and efficient and impact-resistant, so that the change of the rotation inertia of the wheel of the hub motor is realized, and the structural requirements of high durability, high impact and high stability of the wheel are met better. The structure of the invention takes the annular groove of the rotor of the hub motor as the guide rail for torque transmission, thereby effectively avoiding the axial slippage of the clutch device and improving the stability and the impact resistance of the system.
Drawings
Fig. 1 is a schematic structural diagram of a wheel of a hub motor with a wheel-mounted electrically-controlled hydraulic power-assisted clutch device.
Fig. 2 is a partial sectional structure schematic diagram of a hub motor wheel with a wheel-mounted electrically-controlled hydraulically-assisted clutch device.
Detailed Description
The present invention is further described in the following examples, which are intended to be illustrative only and not to be limiting as to the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which would occur to persons skilled in the art upon reading the present specification and which are intended to be within the scope of the present invention as defined in the appended claims.
Referring to fig. 1 and 2, a wheel hub motor wheel with a wheel-mounted electrically-controlled hydraulic power-assisted clutch device according to the present embodiment includes a
The electric control hydraulic system comprises a signal collecting device, an electric control unit and an electromagnetic valve, wherein the signal collecting device comprises a brake signal sensor, a steering signal sensor and a vehicle speed sensor. The electric control unit is connected with the signal collecting device and the electromagnetic valve, and the electromagnetic valve is used for controlling the hydraulic
The operation process of the invention in various states of the vehicle is as follows:
1) turn left in place. When a driver turns a steering wheel left, the speed of the vehicle is zero, a steering wheel steering torque sensor signal and a steering wheel corner sensor signal are input into the electronic control unit, meanwhile, the electronic control unit detects that the speed of the vehicle is zero, the electronic control unit detects a front wheel side angle sensor signal, according to an external sensor signal, through internal operation of the electronic control unit, closing time and releasing time of a clutch plate of the left wheel-mounted electronic control hydraulic power-assisted clutch device are obtained, closing time and releasing time of the right wheel-mounted electronic control hydraulic power-assisted clutch device are obtained, and the vehicle can turn according to a theoretical steering radius.
2) And turning right in place. When a driver turns a steering wheel to the right, the speed of the vehicle is zero, a steering wheel steering torque sensor signal and a steering wheel corner sensor signal are input into the electronic control unit, meanwhile, the electronic control unit detects that the speed of the vehicle is zero, the electronic control unit detects a front wheel side angle sensor signal, according to an external sensor signal, through internal operation of the electronic control unit, closing time and releasing time of a clutch plate of the right wheel-mounted electrically-controlled hydraulic power-assisted clutch device are obtained, closing time and releasing time of the right wheel-mounted electrically-controlled hydraulic power-assisted clutch device are obtained, and the vehicle can turn according to a theoretical steering radius.
3) And (5) braking in a straight running mode. When a driver steps on a brake pedal, the speed of the vehicle is high, a pressure sensor signal and a steering wheel corner sensor signal which are installed on the brake pedal are input into an electric control unit, the electric control unit detects the speed of the vehicle at the same time, according to an external sensor signal, the closing time and the releasing time of a clutch plate of a wheel-mounted electric control hydraulic power-assisted clutch device are obtained through internal operation of the electric control unit, the rotational inertia of a wheel of a hub motor is greatly reduced within a specified time (most of the mass of the hub motor can be understood to be separated from the rotation of the tire), and the high-efficiency braking of the vehicle is realized by the braking effect of the matching of the tire and a tire bracket and a brake plate.
4) And 4, rotating left at low speed. When a driver turns a steering wheel left, the speed of the vehicle is low, a steering wheel steering torque sensor signal and a steering wheel corner sensor signal are input into the electronic control unit, meanwhile, the electronic control unit detects that the speed of the vehicle is low, the electronic control unit detects a front wheel side angle sensor signal, according to an external sensor signal, the closing time and the releasing time of a clutch plate of the left wheel-mounted electronic control hydraulic power-assisted clutch device are obtained through internal operation of the electronic control unit, the closing time and the releasing time of the right wheel-mounted electronic control hydraulic power-assisted clutch device are obtained, and the vehicle can turn according to a theoretical steering radius.
5) And (5) rotating at low speed to the right. When a driver turns a steering wheel at the right, the speed of the vehicle is low, a steering wheel steering torque sensor signal and a steering wheel corner sensor signal are input into the electronic control unit, meanwhile, the electronic control unit detects that the speed of the vehicle is low, the electronic control unit detects a front wheel side angle sensor signal, according to an external sensor signal, through internal operation of the electronic control unit, closing time and releasing time of a clutch plate of the right wheel-mounted electrically-controlled hydraulic power-assisted clutch device are obtained, closing time and releasing time of the right wheel-mounted electrically-controlled hydraulic power-assisted clutch device are obtained, and the vehicle can turn according to a theoretical steering radius.
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