CN111577767A - Intelligent hub bearing component - Google Patents

Abstract

An intelligent hub bearing component is used for manufacturing a hub bearing. The double-row tapered roller bearing and needle bearing combined structure is adopted, the outer ring of the hub bearing is an integrated structure, and the double-row tapered roller bearing and the outer ring of the needle bearing are combined into a whole; the control system installed in the shaft hole of the hub bearing component is integrated into a modular structure, and the speed and the temperature of the hub bearing can be measured simultaneously by adopting wireless transmitting and receiving signals, and the signals are fed back timely. The invention adopts wireless transmitting and receiving signals, can simultaneously measure the speed and the temperature of the hub bearing, feeds back signals in due time, improves the use safety, can effectively avoid the occurrence of sudden situations, has flexible design of internal and external spaces, saves the installation space to a greater extent, has high precision, large rigidity and bearing capacity and good sealing effect, ensures that the bearing forms modularization and grouping, and is more convenient and rapid to maintain and install.

Description

Intelligent hub bearing component

Technical Field

The invention relates to the technical field of bearing manufacturing, in particular to an intelligent hub bearing component.

Background

The hub bearing unit is developed on the basis of a standard angular contact ball bearing and a tapered roller bearing, integrates two sets of bearings, has the advantages of good assembly performance, capability of omitting clearance adjustment, light weight, compact structure, large load capacity, capability of being filled with lubricating grease in advance, capability of omitting external hub sealing, free maintenance and the like, is widely applied to cars, and has the tendency of gradually expanding application in trucks. The hub-bearing unit has mainly gone through the following generations:

the first generation of hub bearings are double-row angular contact ball bearings or double-row tapered roller bearings with integral outer rings and back-to-back combination inner rings. The second generation hub bearing outer race has a flange that is bolted directly to the suspension or mounted to the brake disc and steel ring. The third generation hub bearing consists of an outer ring with a flange plate connected to the suspension and an inner ring with a flange plate connected to the brake disc and the steel ring. Different from the second generation, the third generation hub bearing integrates an ABS sensor, a rolling technology is generally adopted to self-lock the half inner ring, and an axial load is applied to the hub shaft end with the flange plate in the rolling process to deform the hub shaft end to fix the half inner ring.

The main function of the hub bearing is to bear load and provide precise guidance for rotation of the hub, which bears both axial and radial loads. The traditional hub bearing is formed by combining two sets of tapered roller bearings or ball bearings, and the installation, the oiling, the sealing and the clearance adjustment of the bearings are all carried out on an automobile production line. The structure has the defects of difficult assembly, high cost and poor reliability in an automobile production plant, and when an automobile is maintained at a maintenance point, the bearing needs to be cleaned, oiled and adjusted, thereby being inconvenient to apply pretension, having complex installation process and needing to be filled with lubricating grease.

At present, for the wheel hub bearing component of the caterpillar tank, due to the fact that road conditions are complex, the wheel hub bearing component is enabled to be incomparable in actual load stress performance of vehicles with other tires through uneven wild land, ditch, short wall and soft ground and due to the integrity and the ground grabbing performance of the caterpillar tank, and the existing wheel hub bearing cannot meet requirements.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an intelligent hub bearing component to timely monitor the use condition of a hub bearing of a crawler tank under complex road conditions.

In order to achieve the purpose, the invention adopts a combined structure of a double-row tapered roller bearing and a needle roller bearing, an outer ring of a hub bearing is an integrated structure, and the double-row tapered roller bearing and the outer ring of the needle roller bearing are combined into a whole; the control system installed in the shaft hole of the hub bearing component is integrated into a modular structure, and the speed and the temperature of the hub bearing can be measured simultaneously by adopting wireless transmitting and receiving signals, and the signals are fed back timely.

A tapered roller bearing and a tapered retainer are arranged between the outer ring and the first inner ring, a needle roller bearing and a retainer are arranged between the outer ring and the second inner ring, a flange edge of the outer ring is provided with a mounting hole for connecting and mounting a hub, two ends of the outer ring are tapered roller paths, and the middle of the outer ring is a cylindrical roller path; the retainer ring and the elastic retainer ring axially fix the needle roller bearing and the retainer; the left end of the outer ring is tightly pressed and provided with a shaft head cover by using a bolt, an elastic gasket and a flat gasket, the shaft head cover is provided with a magnetic steel sheet and is provided with a chloroprene rubber plugging groove, and a paper gasket is arranged between the outer ring and the shaft head cover for sealing; the right end of the outer ring is tightly pressed and provided with a rotary oil scraper ring by a bolt, an elastic gasket and a flat gasket, two rows of sealing rings are arranged in the rotary oil scraper ring, and a paper pad is arranged between the outer ring and the rotary oil scraper ring for sealing; built-in sealing rings are arranged between two ends of the outer ring and the retainer rings arranged at the end parts of the tapered roller bearings, an O-shaped sealing ring is arranged between the first inner ring and the retainer rings, and the shaft head cover and the retainer rings are axially fixed by using retainer rings.

The control system comprises a measurement and wireless sending unit, a wireless receiving and Can sending unit and a Can interface screen display unit; the temperature of the wheel hub bearing component is measured by a contact sensor, and the speed is measured by a Hall sensor.

Compared with the prior art, the invention has the following advantages:

the design of internal and external spaces is flexible: the inner space is small, the structure of a standard bearing is changed, the outer ring and the hub bearing outer ring are combined into a whole, and the installation space is saved to a greater extent.

High precision: the consistency of the radial play of the double-row tapered roller bearing and the needle bearing is controlled within 0.01 mm.

The rigidity and the bearing capacity are large: the double-row tapered roller bearing and the needle bearing are ingeniously combined, and the outer ring of the tapered roller bearing and the outer ring of the needle bearing are integrated, so that the size of a rolling body is increased, and the bearing capacity of the bearing is improved.

Fourthly, the sealing effect is good: by adopting the combination of the internal multi-layer lip seal and the mechanical dustproof cover, the internal lubricating grease can be effectively prevented from leaking, and external mud and sand can be effectively prevented from entering the bearing.

Intelligent measurement feedback: adopt wireless receiving and dispatching signal, can measure the speed and the temperature of wheel hub bearing simultaneously to in time feedback signal improves the safety in utilization, can effectively avoid the proruption situation to take place.

Sixthly, the installation is convenient and quick: the tapered roller bearing is connected into an integral structure, and the speed sensor and the temperature sensor are integrated into a whole, so that the bearing is modularized and grouped, and the maintenance and the installation are more convenient and faster.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a speed sensor circuit of the present invention.

Fig. 3 is a wireless transceiver module of the present invention.

Fig. 4 is a regulator circuit of the present invention.

Fig. 5 is a battery voltage detection circuit of the present invention.

Fig. 6 is a two-way electronic switching circuit of the present invention.

Fig. 7 is a temperature sensor circuit of the present invention.

Fig. 8 shows a power conversion circuit of the present invention.

Fig. 9 shows a power conversion circuit of the present invention.

Fig. 10 is an MCU control circuit of the present invention.

Fig. 11 is a stand-alone CAN control circuit of the present invention.

FIG. 12 is a diagram of an isolated CAN PHY chip with its own power supply and signal isolation circuitry according to the present invention.

Fig. 13 is a reserved serial FLASH circuit.

Fig. 14 is a real time clock circuit of the present invention.

FIG. 15 is a functional unit connection block diagram of the present invention.

Fig. 16 is a block diagram of the electrical connections of the present invention.

Detailed Description

As shown in fig. 1, the bearing component of the present invention is a modular structure. The hub bearing component adopts a combined structure of a double-row tapered roller bearing and a needle bearing, and the combined structure is more favorable for improving the radial, axial and overturning moment capacity of the bearing. In order to make the stress of the tapered roller bearing and the needle roller bearing uniform, the play of the tapered roller bearing must be smaller than that of the needle roller bearing. The double-row tapered roller bearing is combined with the outer ring 1 of the needle bearing into a whole and is combined with the outer ring of the hub bearing into an integrated structure. A tapered roller bearing 3 and a tapered retainer 4 are arranged between the outer ring 1 and the inner ring I2, a needle bearing 7 and an M-shaped retainer 6 are arranged between the outer ring 1 and the inner ring II 5, a flange edge of the outer ring 1 is provided with a mounting hole for connecting and mounting a hub, two ends of the outer ring 1 are tapered roller paths, and the middle part is a cylindrical roller path; the retainer ring 21 and the elastic retainer ring 22 axially fix the needle bearing 7 and the retainer 6 to prevent the axial movement thereof; the left end of the outer ring 1 is tightly pressed and installed with a shaft head cover 8 by a bolt 9, an elastic washer 10 and a flat washer 11, the shaft head cover 8 is provided with a magnetic steel sheet 19 for a speed sensor, the magnetic steel sheet is combined with a sensor 23 and sends out a signal alarm when exceeding an upper limit value so as to realize the purposes of intelligent tracking and monitoring, a chloroprene rubber plugging groove 20 is formed for transmitting and transmitting signals, and a paper pad 12 is arranged between the outer ring 1 and the shaft head cover 8 for sealing; a rotary oil slinger 13 is tightly pressed and installed at the right end of the outer ring 1 by a bolt 9, an elastic gasket 10 and a flat gasket 11, two rows of lip-shaped sealing rings 14 are installed inside the rotary oil slinger 13, and a paper pad 12 is arranged between the outer ring 1 and the rotary oil slinger 13 for sealing; built-in sealing rings 15 are arranged between two ends of the outer ring 1 and retaining rings 16 arranged at the end parts of the tapered roller bearing 3, an O-shaped sealing ring 17 is arranged between the inner ring I2 and the retaining rings 16, and the shaft head cover 8 and the retaining rings 16 are axially fixed by using clamping rings 18.

The control system 23 of dress in wheel hub bearing group component shaft hole is integrated as modular structure, adopts wireless transceiver signal, can measure the speed and the temperature of wheel hub bearing simultaneously, is convenient for monitor wheel hub bearing's operational aspect to in good time feedback signal, the temperature adopts the contact measurement, and speed adopts hall sensor to measure, reserves load measurement function. The maximum measurement range of the hall sensor of the control system 23 is 0-1500 r/min, the temperature sensors are PT100-1 and PT100-2 type temperature sensors, the measurement range is-43-90 degrees, the control system 23 mainly comprises an antenna for transmitting signals, a protocol controller, a 16-bit single chip microcomputer, a lithium battery and a controller for separately collecting signals, and the control system is divided into three functional units:

measuring and wireless transmitting unit

The unit is used for collecting the temperature (two paths pt100 and 1 path as backup) and the rotating speed (through an HALL sensor) in the hub bearing and sending the temperature and the rotating speed to the wireless receiving unit through the wireless zigbee, and twelve units, six units on the left and six units on the right, are arranged in each tank.

Second, wireless receiving and can receiving and transmitting unit

The unit receives measurement signals sent by the measurement and wireless sending units through the zigbee, two units are arranged in each tank, one unit corresponds to the six measurement and wireless sending units on the left, the other unit corresponds to the six measurement and wireless sending units on the right, and the received data are sent to the display unit through the can bus to be displayed.

③ display unit

And displaying the data of the two wireless receiving and can transceiving units.

Fig. 2-7 show measurement and wireless transmit unit circuits.

As shown in fig. 2, the power supply is provided to the HALL sensor after RC filtering, a north-south magnetic field is manufactured by embedding the magnetic steel sheet 19 into the structure, when the magnetic steel sheet 19 rotates along with the bearing, the output end of the HALL sensor generates high and low signals, and the control system 23 counts the pulse signals or measures the pulse width to obtain the rotating speed signals. VSPEEED _ DET in FIG. 2 is connected with VSPEEED _ DET in the circuit diagram 6 to obtain power supply of the speed measurement circuit; SPEEDDET [1] in FIG. 2 is connected with SPEEDDET [1] in FIG. 3 to provide a tachometer pulse signal to realize wireless transceiving of the speed signal.

As shown in fig. 3, the zigbee protocol SOC chip CC2530 is used for wireless transmission and reception, and the M0 core is integrated, so that power control and wireless transmission and reception processing of each module can be performed. SPEEDDET [1] is connected to SPEEDDET [1] of circuit diagram 2; REFIN + [1] is connected with REFIN + [1] of the circuit diagram 4; VBATDET [1] is connected with VBATDET [1] of the circuit diagram 5; VTEMPCON, VSPEEDCON and VTEMPCON, VSPEEDCON of the circuit diagram 6 are connected; TEMP1[1] and TEMP2[1] are connected to TEMP1[1] and TEMP2[1] in the circuit diagram of FIG. 7.

As shown in fig. 4, the precise voltage of 2.495V is provided by the AP431 voltage regulator, which is used as a reference voltage for ADC conversion. AD _ DET is connected to AD _ DET of fig. 6 to obtain power supply; REFIN + [1] is connected to REFIN + [1] of FIG. 3 to provide a reference voltage.

As shown in fig. 5, the battery voltage detection circuit divides the battery voltage, performs impedance conversion, and sends the divided voltage to the AD channel of CC 2530. AD _ DET is connected to AD _ DET of fig. 6 to obtain power supply; VBATDET [1] is connected to VBATDET [1] of FIG. 3 to provide the converted battery voltage.

As shown in fig. 6, the two electronic switches respectively control the power supplies of the temperature sensor circuit and the speed sensor circuit, and the power supplies are turned off to save energy, thereby prolonging the service life of the battery. VTEMPCON and VSPEEDCON are respectively connected with VTEMPCON and VSPEEDCON in figure 3, and a CC2530 chip controls a power supply pin; AD _ DET is connected to AD _ DET of fig. 4, AD _ DET is connected to AD _ DET of fig. 7 to supply power, and vseed _ DET is connected to vseed _ DET of fig. 2 to supply power.

As shown in fig. 7, for the temperature sensor circuit, a precision resistor with 1K 0.1% precision and a PT100 resistor are used for voltage division, and then the voltage is filtered by an RC filter, sent to an operational amplifier for 6 times amplification, and then sent to an ADC channel of a CC2530 for sampling. AD _ DET is connected to AD _ DET of FIG. 6 to obtain power, TEMP1[1], TEMP2[1] are connected to TEMP1[1], TEMP2[1] of FIG. 3, respectively, to provide converted temperature signals.

Fig. 8-15 are circuit diagrams of the wireless receiving and can transceiver unit.

As shown in FIG. 8, for the power conversion circuit, the power conversion circuit can provide 500mA current by using an automobile-grade NCV890100PDR2G DC/DC chip to carry out power conversion from 12V to 5V. VBAT is the external power supply and VDD5V is the transformed 5V supply. VDD5V is connected to VDD5V of FIG. 9.

As shown in FIG. 9, for the power conversion circuit, SOT23-5 small LDO chip NCV8114ASN330T1G is used to convert 5V into 3.3V power to supply power to CC2530 and related circuits. VDD5V is the converted 5V supply and VDD3.3 is the converted 3V supply. VDD5V is connected to VDD5V of FIG. 8.

As shown in fig. 10, the MCU control circuit mainly processes wireless reception and CAN transceiving by using a CC 2530-based product module. VDD3.3 is connected to VDD3.3 of FIG. 9; CANRESET [1], SPI1CS [1], SPI1MISO [1], SPI1MOSI [1], SPI1SCK [1], CANINT [1], RX0BF [1] are connected to CANRESET [1], SPI1CS [1], SPI1MISO [1], SPI1MOSI [1], SPI1SCK [1], CANINT [1], RX0BF [1], SPIOCS [1], SPIOMISO [1], SPIOWP [1], SPIOSCK [1], SPIOMOSI [1] of FIG. 13 and SPIOCS [1], SPIOMISO [1], SPIOSCK [1], SPIOMOSI [1], and I2CSDA of FIG. 14.

As shown in fig. 11, the controller is an independent CAN controller, and is connected to the MCU through the SPI interface, and encapsulates the received and transmitted data into a CAN protocol message and transmits the CAN protocol message to the CAN bus. And the reverse process is executed to receive data from the CAN bus, unpack the data and send the data to the MCU through the SPI interface. The pins of CANRESET [1], SPI1CS [1], SPI1MISO [1], SPI1MOSI [1], SPI1SCK [1], CANINT [1], RX0BF [1] are respectively connected with CANRESET [1], SPI1CS [1], SPI1MISO [1], SPI1MOSI [1], SPI1SCK [1], CANINT [1], RX0BF [1] of FIG. 10, which are control pins of CAN chip; CANTXA [1], CANRXA [1] are linked to CANTXA [1], CANRXA [1] of FIG. 12, respectively.

As shown in fig. 12, the CAN PHY chip is isolated, and power and signal are isolated from the CAN PHY chip to ensure communication reliability. CANTXA [1] and CANRXA [1] are respectively connected with CANTXA [1] and CANRXA [1] of FIG. 11, CANRXA [1] and CANTXA [1] are CAN signals, and CAN1L [1] and CAN1H [1] are pins connected to a CAN network.

As shown in fig. 13, a serial FLASH circuit is reserved for storing fault information, which facilitates system management. SPIOCS [1], SPIOMISO [1], SPIOWP [1], SPIOSCK [1], and SPIOMOSI [1] are connected to SPIOCS [1], SPIOMISO [1], SPIOWP [1], SPIOSCK [1], and SPIOMOSI [1] of FIG. 10, respectively.

As shown in fig. 14, the real-time clock circuit is used for saving time, and when fault storage is performed, the time of fault needs to be stored synchronously, so as to facilitate fault location. I2CCLK [1], I2CSDA [1] are connected to I2CCLK [1], I2CSDA [1] of FIG. 10, respectively.

As shown in fig. 15, the control system 23 is composed of a first control module 24, a first power module 25, a temperature measuring module 26, a speed measuring module 27, a wireless transmitting module 28, a wireless receiving module 29, a second control module 30, a second power module 31, a CAN communication module 32, and a display system 33; the power supply module I25, the temperature measuring module 26, the speed measuring module 27 and the wireless sending module 28 are respectively connected with the control module I24; the wireless receiving module 29, the power module II 31 and the CAN communication module 32 are respectively connected with the control module II 30; the second power module 31 and the CAN communication module 32 are respectively connected with a display system 33. The wireless transmission module 28 transmits the temperature and speed measurement data to the wireless reception module 29.

As shown in fig. 16, three functional units (a measurement and wireless transmission unit, a wireless reception and CAN transceiver unit, and a display unit) constitute the intelligent sensing system of the intelligent bearing unit.

Claims (3)

1. An intelligence wheel hub bearing component which characterized in that: the hub bearing component adopts a combined structure of a double-row tapered roller bearing and a needle roller bearing, the outer ring of the hub bearing is an integrated structure, and the double-row tapered roller bearing and the outer ring (1) of the needle roller bearing are combined into a whole; the control system (23) arranged in the shaft hole of the wheel hub bearing component is integrated into a modular structure, adopts wireless transmitting and receiving signals, can simultaneously measure the speed and the temperature of the wheel hub bearing, and feeds back signals in due time.

2. The intelligent hub bearing component of claim 1, wherein: a tapered roller bearing (3) and a tapered retainer (4) are arranged between the outer ring (1) and the inner ring I (2), a needle roller bearing (7) and a retainer (6) are arranged between the outer ring (1) and the inner ring II (5), a flange edge of the outer ring (1) is provided with a mounting hole for connecting and mounting a hub, two ends of the outer ring (1) are tapered roller paths, and the middle part of the outer ring (1) is a cylindrical roller path; the retainer ring (21) and the elastic retainer ring (22) axially fix the needle bearing (7) and the retainer (6); the left end of the outer ring (1) is tightly pressed and mounted with the shaft cover (8) through a bolt (9), an elastic washer (10) and a flat washer (11), the shaft cover (8) is provided with a magnetic steel sheet (19) and a chloroprene rubber plugging groove (20), and a paper pad (12) is arranged between the outer ring (1) and the shaft cover (8) for sealing; a rotary oil slinger (13) is tightly pressed and installed at the right end of the outer ring (1) by a bolt (9), an elastic gasket (10) and a flat gasket (11), two rows of sealing rings (14) are installed inside the rotary oil slinger (13), and a paper pad (12) is arranged between the outer ring (1) and the rotary oil slinger (13) for sealing; built-in sealing rings (15) are arranged between two ends of the outer ring (1) and a retaining ring (16) arranged at the end part of the tapered roller bearing (3), an O-shaped sealing ring (17) is arranged between the inner ring I (2) and the retaining ring (16), and the shaft head cover (8) and the retaining ring (16) are axially fixed by a retaining ring (18).

3. The intelligent hub bearing component of claim 1, wherein: the control system (23) comprises a measurement and wireless sending unit, a wireless receiving and Can sending unit and a Can interface screen display unit; the temperature of the wheel hub bearing component is measured by a contact sensor, and the speed is measured by a Hall sensor.

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