WO2022028231A1 - 车轮转速测量组件和轮毂驱动系统 - Google Patents

车轮转速测量组件和轮毂驱动系统 Download PDF

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Publication number
WO2022028231A1
WO2022028231A1 PCT/CN2021/106847 CN2021106847W WO2022028231A1 WO 2022028231 A1 WO2022028231 A1 WO 2022028231A1 CN 2021106847 W CN2021106847 W CN 2021106847W WO 2022028231 A1 WO2022028231 A1 WO 2022028231A1
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WIPO (PCT)
Prior art keywords
shaft
wheel
synchronizing
rotational speed
outer ring
Prior art date
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PCT/CN2021/106847
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English (en)
French (fr)
Inventor
蔡向阳
Original Assignee
舍弗勒技术股份两合公司
蔡向阳
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Publication date
Application filed by 舍弗勒技术股份两合公司, 蔡向阳 filed Critical 舍弗勒技术股份两合公司
Priority to US18/018,299 priority Critical patent/US20230294454A1/en
Priority to DE112021004203.3T priority patent/DE112021004203T5/de
Publication of WO2022028231A1 publication Critical patent/WO2022028231A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0047—Hubs characterised by functional integration of other elements
    • B60B27/0068—Hubs characterised by functional integration of other elements the element being a sensor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/001—Hubs with roller-bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0015—Hubs for driven wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0078—Hubs characterised by the fixation of bearings
    • B60B27/0089—Hubs characterised by the fixation of bearings caulking to fix outer race
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
    • B60B7/0013—Hub caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/121—Power-transmission from drive shaft to hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle

Definitions

  • the invention relates to a wheel hub drive system, and also relates to a wheel rotational speed measuring assembly for measuring the rotational speed of a wheel in the wheel hub drive system.
  • In-wheel drive is a way of electrically driving a vehicle.
  • the wheel hub drive system integrates the drive assembly and the brake assembly inside the rim, wherein the drive assembly includes a drive motor, a gear reducer and a wheel hub bearing.
  • Figure 1 is a schematic diagram of a possible wheel hub drive system comprising a drive motor W1, a reducer W2, a wheel hub bearing W3 and a brake W4.
  • the torque from the drive motor W1 is transmitted to the hub bearing W3 through the reducer W2, and the bolt W5 connects the flange portion of the outer ring of the hub bearing W3 to the hub, thereby further transmitting the torque to the wheel.
  • the rotational speed of the rim is the same as the rotational speed of the wheel.
  • the wheel speed can be measured indirectly, for example, the wheel speed can be calculated by measuring the speed of the drive motor W1 through an angle sensor.
  • the indirect measurement method has problems such as low signal accuracy and delay in signal transmission, and there may be a large error between the obtained wheel speed and the actual speed, which poses a threat to the safety of the wheel hub drive system.
  • the purpose of the present invention is to overcome or at least alleviate the above-mentioned deficiencies of the prior art, and to provide a wheel rotational speed measuring assembly and a wheel hub drive system.
  • a wheel speed measurement assembly for measuring the speed of a wheel driven by a hub drive system, the wheel speed measurement assembly comprising a wheel hub bearing, a synchronous shaft and a compiler, wherein,
  • the wheel hub bearing includes a central shaft and an outer ring, the central shaft is a hollow shaft with a through inner cavity in the axial direction, and the central shaft is used to connect with the vehicle suspension in a non-rotatable manner,
  • the outer ring is sleeved on the first end of the central shaft, the outer ring can be driven by the motor of the wheel hub drive system to rotate relative to the central shaft, and the outer ring is used for being unable to rotate relative to the wheel hub ground connection,
  • the synchronizing shaft is arranged in the inner cavity, and the end of the synchronizing shaft close to the first end is connected to the outer ring in a non-rotatable manner,
  • the translator is mounted on the end of the synchronizing shaft remote from the first end, and the translator can be identified by a sensor to measure the rotational speed of the wheel.
  • the measurement assembly further includes a synchronization cover, the synchronization cover and the outer ring are installed on one end of the outer ring in a non-rotatable manner, and the synchronization shaft and the synchronization cover are non-rotatable relative to each other ground connection.
  • a connecting groove is formed on a side of the synchronization cover facing the inner cavity, and a connecting portion is formed on an end of the synchronization shaft facing the synchronization cover, and the connecting portion extends into the connection so that the synchronizing cover can rotate relative to the central shaft with the synchronizing shaft.
  • the measurement assembly further comprises a bracket, the bracket has a central hole and is annular, the bracket is arranged in the inner cavity and is connected with the central shaft in a non-rotatable manner, the synchronization A shaft passes through the middle hole, and the synchronizing shaft is radially supported by the bracket.
  • a bearing is provided between the synchronizing shaft and the inner peripheral wall of the bracket.
  • the synchronizing shaft has a shoulder
  • the inner peripheral wall of the bracket has an annular positioning portion recessed radially outward
  • the bearing is provided on the shoulder and the positioning portion between.
  • the two bearings are provided at both ends of the bracket.
  • the bearing is a sliding bearing lubricated with grease or with a self-lubricating function.
  • the measurement assembly further includes a tail cap mounted on an end of the central shaft remote from the first end to close the inner cavity.
  • a wheel hub drive system comprising a drive motor and a reducer, and further comprising a wheel rotational speed measurement assembly according to the present invention
  • the rotor of the driving motor and the input end of the reducer are connected in a non-rotatable manner, and the outer ring of the wheel hub bearing of the wheel rotational speed measuring assembly and the output end of the reducer are connected in a non-rotatable manner.
  • the wheel speed measuring assembly according to the present invention has a simple structure, can directly measure the wheel speed, and has reasonable space utilization.
  • Figure 1 is a schematic diagram of one possible hub drive system.
  • FIG. 2 is an axial cross-sectional view of a wheel rotational speed measurement assembly according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a synchronization cover of a wheel speed measurement assembly according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a synchronizing shaft of a wheel speed measurement assembly according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a bracket of a wheel speed measurement assembly according to an embodiment of the present invention.
  • FIG. 6 is an axial cross-sectional view of FIG. 5 .
  • W1 drive motor ; W2 reducer; W3 hub bearing; W4 brake; W5 bolt;
  • B wheel hub bearing ; B1 center shaft; B1a inner cavity; B2 outer ring;
  • A represents the axial direction of the wheel speed measurement assembly, which is consistent with the axial direction of the hub bearing B in the wheel speed measurement assembly;
  • R represents the radial direction of the wheel speed measurement assembly, the radial direction R coincides with the radial direction of the hub bearing B in the wheel speed measurement assembly.
  • the wheel rotational speed measuring assembly according to the present invention will be described with reference to FIGS. 2 to 6 .
  • the wheel rotational speed measuring assembly is a part of a wheel hub drive system and is used to measure the rotational speed of a wheel driven by the wheel hub drive system.
  • the wheel rotational speed measuring assembly includes a hub bearing B, a synchronizing shaft 10 , a synchronizing cover 20 , a compiler 30 , a bracket 40 , a tail cover 50 and a bearing 60 .
  • the hub bearing B includes a center shaft B1, an outer ring B2, and rolling bodies disposed between the center shaft B1 and the outer ring B2.
  • the central axis B1 is a hollow shaft that penetrates in the axial direction A. As shown in FIG. The central axle B1 is fixed to the housing of the wheel hub drive system, and the housing is fixed to the suspension of the vehicle, or the central axle B1 is connected to the suspension of the vehicle in a torsionally fixed (non-rotatable) manner.
  • the outer ring B2 is sleeved on one end of the central shaft B1 and can rotate relative to the central shaft B1.
  • the outer ring B2 is used to connect the output end of the hub and the reducer (not shown), so that the drive motor from the hub drive system
  • the torque (not shown) can be transmitted to the hub through the speed reducer and the outer ring B2 in sequence.
  • the length of the outer ring B2 is smaller than the length of the central shaft B1.
  • the end of the central axis B1 where the outer ring B2 is located is referred to as the first end of the central axis B1.
  • the outer periphery of the outer ring B2 in the axial direction A near the first end has a flange portion protruding outward in the radial direction R, and the hub (not shown) can be connected to the flange portion by bolts W5 .
  • the outer diameter of the section of the central shaft B1 in the axial direction A near the first end is smaller than that of the section farther from the first end. outer diameter.
  • the synchronizing cover 20 is mounted on the end of the outer ring B2 close to the first end of the central axis B1, and the synchronizing cover 20 is connected with the outer ring B2 in a rotationally fixed manner (eg, by screw connection or interference fit).
  • the side wall of the synchronizing cover 20 facing the inner cavity B1a of the central axis B1 is provided with a connecting platform 21 protruding toward the inner cavity B1a, and the middle of the connecting platform 21 is concave to form a connecting groove 211, which is used for connecting the connection and will be described further below.
  • the synchronizing cover 20 not only functions to connect the synchronizing shaft 10 and the outer ring B2, but also functions to seal the hub bearing B at the end to prevent contaminants such as splashed sewage from entering the interior of the hub bearing B.
  • the synchronizing shaft 10 is arranged in the inner cavity B1a of the central shaft B1.
  • One end of the synchronizing shaft 10 and the synchronizing cover 20 are connected to the connecting groove 211 in a rotationally fixed manner.
  • this end portion of the synchronizing shaft 10 forms a connecting portion 11 having a special cross-sectional shape, and the cross-sectional shape of the connecting portion 11 is the same as that of the connecting groove 211 .
  • the cross section perpendicular to the axial direction A of the connecting portion 11 is waist-shaped, which is formed by cutting the end portion of the synchronization shaft 10 in the axial direction, for example.
  • the distance between the two flat parts of the waist shape is approximately equal to the width of the connecting groove 211 , so that the connecting part 11 can extend into the connecting groove 211 and fit closely with the side wall of the connecting groove 211 .
  • the cross-sections of the connecting portion 11 and the connecting groove 211 may also have other shapes, which are not limited in the present invention.
  • the synchronizing cover 20 can drive the synchronizing shaft 10 to rotate synchronously. Since the synchronizing cover 20 rotates synchronously with the outer ring B2 and the wheel rotates synchronously with the outer ring B2, the rotation of the synchronizing shaft 10 is synchronized with the wheel.
  • the end of the synchronizing shaft 10 remote from the connecting portion 11 is provided with a compiler 30 which is connected to the synchronizing shaft 10 in a rotationally fixed manner. Since the above-mentioned ends are far away from the outer ring B2 and the rim, there is enough space to install the compiler 30, and the sensor for detecting the rotation signal of the compiler 30 can be conveniently arranged on the nearby vehicle suspension.
  • the rotational speed of the compiler 30 measured by the sensor is the rotational speed of the wheel.
  • the compiler 30 is annular, the end of the synchronization shaft 10 away from the connecting portion 11 is set as a compiler mounting portion 13 having a larger outer diameter, and the annular compiler 30 is sleeved on the compiler mounting portion 13.
  • the compiler 30 and the compiler installation portion 13 are press-fitted by means of interference fit, or are installed by means of screw connection.
  • a bracket 40 is arranged in the inner cavity B1a, and the bracket 40 is connected with the central shaft B1 in a torsionally fixed manner.
  • the bracket 40 is annular, and the outer peripheral wall of the bracket 40 forms an interference fit with the inner peripheral wall of the synchronizing shaft 10 that defines the inner cavity B1a.
  • the synchronizing shaft 10 passes through the middle hole 41 of the bracket 40 , and a bearing 60 is provided between the inner peripheral wall of the bracket 40 and the synchronizing shaft 10 .
  • the bearing 60 is a sliding bearing.
  • bearings 60 there are two bearings 60 , which are respectively provided at two axial ends of the bracket 40 .
  • the axial region where the bearing 60 of the synchronizing shaft 10 is mounted forms the shaft shoulder 12
  • the inner peripheral wall of the bracket 40 forms two annular positioning portions 42 which are recessed radially outward at both axial ends.
  • the inner ring of the bearing 60 is mounted on the shoulder 12
  • the outer ring of the bearing 60 is mounted on the positioning portion 42 .
  • the part of the central axis B1 away from the first end has a larger inner diameter, that is, the inner cavity B1a has a larger inner diameter at the part where the bracket 40 is installed, so that the inner cavity B1a forms one end with a larger inner diameter A small shape at one end.
  • the end of the central shaft B1 away from the first end is provided with a tail cover 50, which is used to close the inner cavity B1a at this end, thereby preventing pollutants such as splashed sewage from entering the inner cavity B1a and even further passing through
  • the inner cavity B1a flows to the first end of the center shaft B1 and enters the inside of the hub bearing B.
  • the tail cover 50 is embedded in the inner peripheral wall of the central axis B1.
  • the bearing 60 is preferably lubricated with grease, or the bearing 60 is preferably a bearing with self-lubricating function.
  • the senor for sensing the signal of the compiler 30 may be arranged outside the central axle B1, for example mounted on the vehicle suspension.
  • the sensor may or may not be part of the wheel speed measurement assembly of the present application.
  • the wheel rotational speed measuring assembly according to the present invention can directly measure the rotational speed of the wheel, and the obtained rotational speed signal is direct and reliable.
  • the compiler 30 is housed in the closed cavity B1a and is not easily damaged.
  • the compiler 30 may be a conventional sensor for measuring rotational speed.
  • the wheel rotational speed measuring assembly according to the present invention effectively utilizes the inner space of the wheel hub drive system, and may not need to occupy the extra space of the original wheel hub drive system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

一种车轮转速测量组件和轮毂驱动系统，车轮转速测量组件包括轮毂轴承（B）、同步轴（10）和编译器（30），轮毂轴承（B）包括中轴（B1）和外圈（B2），中轴（B1）为具有内腔（B1a）的空心轴，中轴（B1）用于与车辆悬架抗扭地连接，外圈（B2）套设于中轴（B1）的第一端，外圈（B2）能够受驱动而相对于中轴（B1）转动，外圈（B2）用于与轮毂抗扭地连接，同步轴（10）设置于内腔（B1a）中，同步轴（10）的靠近第一端的端部与外圈（B2）抗扭地连接，编译器（30）安装于同步轴（10）的远离第一端的端部。

Description

车轮转速测量组件和轮毂驱动系统 技术领域
本发明涉及轮毂驱动系统，还涉及轮毂驱动系统中用于测量车轮转速的车轮转速测量组件。
背景技术
轮毂驱动是电驱动车辆的一种方式。通常，轮毂驱动系统将驱动组件和制动组件都集成在轮辋的内侧，其中，驱动组件包括驱动电机、齿轮减速器和轮毂轴承。
图1是一种可能的轮毂驱动系统的示意图，其包括驱动电机W1、减速器W2、轮毂轴承W3和制动器W4。来自驱动电机W1的扭矩通过减速器W2传递给轮毂轴承W3，螺栓W5将轮毂轴承W3的外圈的法兰部与轮毂相连，从而进一步将扭矩传递给车轮。其中，轮辋的转速与车轮的转速相同。
由于轮毂驱动系统和轮辋之间的空间有限，很难设置传感器直接测量车轮的转速。因此通常只能间接测量车轮转速，例如通过角度传感器测量驱动电机W1的转速来计算车轮的转速。
间接的测量方式由于存在例如信号精度不高、信号传输存在延时等问题，所获得的车轮转速与实际转速之间可能存在较大的误差，这对轮毂驱动系统的安全性构成了威胁。
发明内容
本发明的目的在于克服或至少减轻上述现有技术存在的不足，提供一种车轮转速测量组件和轮毂驱动系统。
根据本发明的第一方面，提供一种车轮转速测量组件，其用于测量受轮毂驱动系统驱动的车轮的转速，所述车轮转速测量组件包括轮毂轴承、同步 轴和编译器，其中，
所述轮毂轴承包括中轴和外圈，所述中轴为在轴向上具有贯通的内腔的空心轴，所述中轴用于与车辆悬架不能相对转动地连接，
所述外圈套设于所述中轴的第一端，所述外圈能够受所述轮毂驱动系统的电机的驱动而相对于所述中轴转动，所述外圈用于与轮毂不能相对转动地连接，
所述同步轴设置于所述内腔中，所述同步轴的靠近所述第一端的端部与所述外圈不能相对转动地连接，
所述编译器安装于所述同步轴的远离所述第一端的端部，所述编译器能够被传感器识别从而测量所述车轮的转速。
在至少一个实施方式中，所述测量组件还包括同步盖，所述同步盖与所述外圈不能相对转动地安装于所述外圈的一端，所述同步轴与所述同步盖不能相对转动地连接。
在至少一个实施方式中，所述同步盖的朝向所述内腔的一侧形成有连接槽，所述同步轴的朝向所述同步盖的一端形成连接部，所述连接部伸入所述连接槽内，从而所述同步盖能够带着所述同步轴相对于所述中轴转动。
在至少一个实施方式中，所述测量组件还包括支架，所述支架具有中孔而呈环形，所述支架设置于所述内腔内并与所述中轴不能相对转动地连接，所述同步轴穿过所述中孔，所述同步轴在径向上得到所述支架的支承。
在至少一个实施方式中，所述同步轴和所述支架的内周壁之间设有轴承。
在至少一个实施方式中，所述同步轴具有轴肩，所述支架的所述内周壁具有向径向外侧凹进的环形的定位部，所述轴承设置于所述轴肩和所述定位部之间。
在至少一个实施方式中，所述轴承有两个，在所述轴向上，两个所述轴 承设置于所述支架的两个端部。
在至少一个实施方式中，所述轴承为采用润滑脂润滑、或具有自润滑功能的滑动轴承。
在至少一个实施方式中，所述测量组件还包括尾盖，所述尾盖安装在所述中轴的远离所述第一端的端部以封闭所述内腔。
根据本发明的第二方面，提供一种轮毂驱动系统，包括驱动电机和减速器，还包括根据本发明的车轮转速测量组件，
所述驱动电机的转子和所述减速器的输入端不能相对转动地连接，所述车轮转速测量组件的所述轮毂轴承的所述外圈和所述减速器的输出端不能相对转动地连接。
根据本发明的车轮转速测量组件结构简单、能直接测量车轮转速且空间利用合理。
根据本发明的轮毂驱动系统，其输出的转速能被准确测量且其尺寸小巧。
附图说明
图1是一种可能的轮毂驱动系统的示意图。
图2是根据本发明的一个实施方式的车轮转速测量组件的沿轴向的剖视图。
图3是根据本发明的一个实施方式的车轮转速测量组件的同步盖的示意图。
图4是根据本发明的一个实施方式的车轮转速测量组件的同步轴的示意图。
图5是根据本发明的一个实施方式的车轮转速测量组件的支架的示意图。
图6是图5的沿轴向的剖视图。
附图标记说明：
W1驱动电机；W2减速器；W3轮毂轴承；W4制动器；W5螺栓；
B轮毂轴承；B1中轴；B1a内腔；B2外圈；
10同步轴；11连接部；12轴肩；13编译器安装部；
20同步盖；21连接台；211连接槽；
30编译器；40支架；41中孔；42定位部；
50尾盖；60轴承。
具体实施方式
下面参照附图描述本发明的示例性实施方式。应当理解，这些具体的说明仅用于示教本领域技术人员如何实施本发明，而不用于穷举本发明的所有可行的方式，也不用于限制本发明的范围。
除非特别说明，参照图2，A表示车轮转速测量组件的轴向，该轴向A与车轮转速测量组件中的轮毂轴承B的轴向一致；R表示车轮转速测量组件的径向，该径向R与车轮转速测量组件中的轮毂轴承B的径向一致。
参照图2至图6介绍根据本发明的车轮转速测量组件。该车轮转速测量组件属于轮毂驱动系统的一部分，其用于测量受轮毂驱动系统驱动的车轮的转速。
在本实施方式中，车轮转速测量组件包括轮毂轴承B、同步轴10、同步盖20、编译器30、支架40、尾盖50和轴承60。
轮毂轴承B包括中轴B1、外圈B2和设置于中轴B1与外圈B2之间的滚动体。
中轴B1为在轴向A上贯通的空心轴。中轴B1固定于轮毂驱动系统的壳体，壳体固定于车辆的悬架，或者说中轴B1与车辆的悬架抗扭地(不能相对 转动地)连接。
外圈B2套设在中轴B1的一个端部并能相对于中轴B1转动，外圈B2用于连接轮毂和减速器(图未示)的输出端，从而使来自轮毂驱动系统的驱动电机(图未示)的扭矩能依次通过减速器和外圈B2而传递给轮毂。在轴向A上，外圈B2的长度小于中轴B1的长度。为下文表述方便，将外圈B2所在的中轴B1的端部称为中轴B1的第一端。
在本实施方式中，外圈B2在轴向A上靠近第一端的外周具有向径向R的外侧凸出的法兰部，轮毂(图未示)可以通过螺栓W5而与法兰部连接。
优选地，为方便滚动体和外圈B2的在中轴B1上的轴向定位，中轴B1在轴向A上的靠近第一端的区段的外径小于远离第一端的区段的外径。
同步盖20安装于外圈B2的靠近中轴B1的第一端的端部，并且同步盖20与外圈B2抗扭地连接(例如通过螺纹连接或过盈配合地连接)。
同步盖20的朝向中轴B1的内腔B1a的侧壁设有向内腔B1a凸出的连接台21，连接台21的中部凹进而形成连接槽211，连接槽211用于连接下文将进一步介绍的同步轴10。
同步盖20既起到了连接同步轴10和外圈B2的作用，还起到了在端部密封轮毂轴承B的作用、以防止例如飞溅的污水等污染物进入轮毂轴承B的内部。
同步轴10设置于中轴B1的内腔B1a中。同步轴10的一端与同步盖20抗扭地连接于连接槽211。具体地，同步轴10的这个端部形成具有特殊截面形状的连接部11，连接部11的截面形状与连接槽211的截面形状相同。
在本实施方式中，连接部11的垂直于轴向A的截面呈腰形，其例如通过沿轴向切割同步轴10的端部而形成。腰形的两个平面部之间的距离大致等于连接槽211的宽度，从而连接部11能伸入连接槽211中并与连接槽211的侧壁紧密配合。应当理解，连接部11和连接槽211的截面还可以是其它形状，本发明对此不作限制。
通过这种方式，同步盖20能带动同步轴10同步地转动，又由于同步盖20与外圈B2同步转动、车轮与外圈B2同步转动，因此，同步轴10的转动是同步于车轮的。
同步轴10的远离连接部11的端部设有编译器30，编译器30与同步轴10抗扭地连接。由于上述端部远离外圈B2和轮辋，因此有足够的空间可以设置编译器30，并且用于探测编译器30的转动信号的传感器可以方便地设置在附近的车辆悬架上。传感器所测量的编译器30的转速即为车轮的转速。
在本实施方式中，编译器30呈环形，同步轴10的远离连接部11的端部被设置成具有较大外径的编译器安装部13，环形的编译器30套设于编译器安装部13，编译器30与编译器安装部13例如通过过盈配合的方式压装、或者通过螺纹连接的方式安装。
为稳定地支承同步轴10，内腔B1a内设有支架40，支架40与中轴B1抗扭地连接。
支架40呈环形，支架40的外周壁与同步轴10的限定内腔B1a的内周壁形成过盈配合。
同步轴10穿过支架40的中孔41，支架40的内周壁和同步轴10之间设有轴承60。优选地，轴承60为滑动轴承。
在本实施方式中，轴承60有两个，它们分别设置在支架40的两个轴向端部。同步轴10的安装轴承60的轴向区域形成轴肩12，支架40的内周壁在两个轴向端部处向径向外侧凹进地形成两个环形的定位部42。轴承60的内圈安装于轴肩12处、轴承60的外圈安装于定位部42。
优选地，为了方便支架40的安装，中轴B1的远离第一端的部分具有更大的内径，即，内腔B1a在安装支架40的部分具有更大的内径、使得内腔B1a形成一端大一端小的形状。
中轴B1的远离第一端的端部设有尾盖50，尾盖50用于在该端部将内腔 B1a封闭，从而能阻止例如飞溅的污水等污染物进入内腔B1a、甚至进一步通过内腔B1a流至中轴B1的第一端而进入轮毂轴承B的内部。在本实施方式中，尾盖50嵌设于中轴B1的内周壁。
由于内腔B1a被两个盖封闭住而不方便给轴承60补充润滑剂，因此轴承60优选使用润滑脂润滑，或者轴承60优选是具有自润滑功能的轴承。
应当理解，用于感测编译器30的信号的传感器可以设置于该中轴B1的外部，例如安装在车辆悬架上。该传感器可以作为或不作为本申请的车轮转速测量组件的一部分。
本发明至少具有以下优点中的一个优点：
(i)根据本发明的车轮转速测量组件能直接测量车轮的转速，所获取的转速信号直接而可靠。
(ii)编译器30被收容在封闭的内腔B1a内，不容易受到污损。
(iii)编译器30可以是常规的测量转速用的传感器的编译器。
(iv)根据本发明的车轮转速测量组件有效利用了轮毂驱动系统的内部空间，可以不需要占用原轮毂驱动系统的额外的空间。
当然，本发明不限于上述实施方式，本领域技术人员在本发明的教导下可以对本发明的上述实施方式做出各种变型，而不脱离本发明的范围。

Claims (10)

  1. 一种车轮转速测量组件，其用于测量受轮毂驱动系统驱动的车轮的转速，所述车轮转速测量组件包括轮毂轴承(B)、同步轴(10)和编译器(30)，其中，
    所述轮毂轴承(B)包括中轴(B1)和外圈(B2)，所述中轴(B1)为在轴向(A)上具有贯通的内腔(B1a)的空心轴，所述中轴(B1)用于与车辆悬架不能相对转动地连接，
    所述外圈(B2)套设于所述中轴(B1)的第一端，所述外圈(B2)能够受所述轮毂驱动系统的电机的驱动而相对于所述中轴(B1)转动，所述外圈(B2)用于与轮毂不能相对转动地连接，
    所述同步轴(10)设置于所述内腔(B1a)中，所述同步轴(10)的靠近所述第一端的端部与所述外圈(B2)不能相对转动地连接，
    所述编译器(30)安装于所述同步轴(10)的远离所述第一端的端部，所述编译器(30)能够被传感器识别从而测量所述车轮的转速。
  2. 根据权利要求1所述的车轮转速测量组件，其特征在于，所述测量组件还包括同步盖(20)，所述同步盖(20)与所述外圈(B2)不能相对转动地安装于所述外圈(B2)的一端，所述同步轴(10)与所述同步盖(20)不能相对转动地连接。
  3. 根据权利要求2所述的车轮转速测量组件，其特征在于，所述同步盖(20)的朝向所述内腔(B1a)的一侧形成有连接槽(211)，所述同步轴(10)的朝向所述同步盖(20)的一端形成连接部(11)，所述连接部(11)伸入所述连接槽(211)内，从而所述同步盖(20)能够带着所述同步轴(10)相对于所述中轴(B1)转动。
  4. 根据权利要求1所述的车轮转速测量组件，其特征在于，所述测量组件还包括支架(40)，所述支架(40)具有中孔(41)而呈环形，所述支架(40)设置于所述内腔(B1a)内并与所述中轴(B1)不能相对转动地连接， 所述同步轴(10)穿过所述中孔(41)，所述同步轴(10)在径向(R)上得到所述支架(40)的支承。
  5. 根据权利要求4所述的车轮转速测量组件，其特征在于，所述同步轴(10)和所述支架(40)的内周壁之间设有轴承(60)。
  6. 根据权利要求5所述的车轮转速测量组件，其特征在于，所述同步轴(10)具有轴肩(12)，所述支架(40)的所述内周壁具有向径向外侧凹进的环形的定位部(42)，所述轴承(60)设置于所述轴肩(12)和所述定位部(42)之间。
  7. 根据权利要求6所述的车轮转速测量组件，其特征在于，所述轴承(60)有两个，在所述轴向(A)上，两个所述轴承(60)设置于所述支架(40)的两个端部。
  8. 根据权利要求5至7中任一项所述的车轮转速测量组件，其特征在于，所述轴承(60)为采用润滑脂润滑、或具有自润滑功能的滑动轴承。
  9. 根据权利要求1至7中任一项所述的车轮转速测量组件，其特征在于，所述测量组件还包括尾盖(50)，所述尾盖(50)安装在所述中轴(B1)的远离所述第一端的端部以封闭所述内腔(B1a)。
  10. 一种轮毂驱动系统，包括驱动电机和减速器，其特征在于，所述轮毂驱动系统还包括根据权利要求1至9中任一项所述的车轮转速测量组件，
    所述驱动电机的转子和所述减速器的输入端不能相对转动地连接，所述车轮转速测量组件的所述轮毂轴承(B)的所述外圈(B2)和所述减速器的输出端不能相对转动地连接。
PCT/CN2021/106847 2020-08-07 2021-07-16 车轮转速测量组件和轮毂驱动系统 WO2022028231A1 (zh)

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US3934685A (en) * 1974-11-04 1976-01-27 Rockwell International Corporation Wheel speed sensor assembly
FR2659450A1 (fr) * 1990-03-09 1991-09-13 Skf France Dispositif de moyeu a roulement muni d'un capteur a double detection de la vitesse de rotation.
CN104081073A (zh) * 2012-03-15 2014-10-01 舍弗勒技术有限两合公司 具有传感器容纳部的车轮轴承
CN104385900A (zh) * 2009-11-27 2015-03-04 Ntn株式会社 内置有内圈型电动机的带有传感器的车轮用轴承装置

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Publication number Priority date Publication date Assignee Title
GB1163039A (en) * 1967-01-03 1969-09-04 Goodyear Tire & Rubber Apparatus for Detecting the Speed of Wheel Rotation.
US3934685A (en) * 1974-11-04 1976-01-27 Rockwell International Corporation Wheel speed sensor assembly
FR2659450A1 (fr) * 1990-03-09 1991-09-13 Skf France Dispositif de moyeu a roulement muni d'un capteur a double detection de la vitesse de rotation.
CN104385900A (zh) * 2009-11-27 2015-03-04 Ntn株式会社 内置有内圈型电动机的带有传感器的车轮用轴承装置
CN104081073A (zh) * 2012-03-15 2014-10-01 舍弗勒技术有限两合公司 具有传感器容纳部的车轮轴承

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