CN111306188B - Electric automobile supersound suspension wheel hub bearing - Google Patents
Electric automobile supersound suspension wheel hub bearing Download PDFInfo
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- CN111306188B CN111306188B CN202010261068.0A CN202010261068A CN111306188B CN 111306188 B CN111306188 B CN 111306188B CN 202010261068 A CN202010261068 A CN 202010261068A CN 111306188 B CN111306188 B CN 111306188B
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- 239000000725 suspension Substances 0.000 title claims abstract description 33
- 230000005855 radiation Effects 0.000 claims description 22
- 239000000919 ceramic Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000001603 reducing effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/40—Ball cages for multiple rows of balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/005—Cooling of bearings of magnetic bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/007—Cooling of bearings of rolling bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
本发明公开了一种电动汽车超声悬浮轮毂轴承，包括压电换能器、轴承箱和保持架组件；所述的压电换能器安装在轴承箱的3个小箱体上；所述的保持架组件安装在轴承箱的圆形通孔内；所述的压电换能器包括辐射头、变幅杆、绝缘套筒、后盖板和预应力螺栓；所述的轴承箱包括一个六边形箱体和三个小箱体；所述的保持架组件包括两组大型保持架、两组小型保持架和滚珠。本发明能够利用超声振动的减摩特性减小轴间摩擦，降低运行过程中产生的摩擦热，其极限转速、精度和使用寿命等方面均优于目前电动汽车所使用的双列角接触球轴承。本发明利用保持架限制滚珠的相对运动，滚珠只能在大型保持架和环形滚道之间或小型保持架和环形滚道之间实现自转。
The invention discloses an ultrasonic suspension wheel hub bearing of an electric vehicle, comprising a piezoelectric transducer, a bearing box and a cage assembly; the piezoelectric transducer is installed on three small boxes of the bearing box; the The cage assembly is installed in the circular through hole of the bearing box; the piezoelectric transducer includes a radiating head, a horn, an insulating sleeve, a rear cover plate and a prestressed bolt; the bearing box includes a six A side-shaped box body and three small box bodies; the cage assembly includes two groups of large cages, two groups of small cages and balls. The invention can reduce the friction between shafts by using the friction-reducing characteristics of ultrasonic vibration and reduce the frictional heat generated during operation, and its limit rotational speed, precision and service life are superior to the double row angular contact ball bearings currently used in electric vehicles. . The invention utilizes the cage to limit the relative movement of the balls, and the balls can only realize self-rotation between the large cage and the annular raceway or between the small cage and the annular raceway.
Description
Technical Field
The invention belongs to the technical field of electric automobile bearings, and particularly relates to an ultrasonic suspension hub bearing for an electric automobile.
Background
The bearing is a common part in mechanical equipment, and has the main functions of supporting a mechanical rotating body, reducing the friction coefficient in the motion process of the mechanical rotating body and ensuring the rotation precision of the mechanical rotating body. The automobile generally adopts double-row angular contact ball bearing at present, and this bearing can adapt to work under various high-speed operating modes owing to can bear radial load and axial load simultaneously, has longer life, still avoids not opening the wearing and tearing that produced frictional heat led to the fact the bearing of traveling for a long time, needs relevant technical staff regularly to carry out safety inspection and change to automobile wheel hub bearing, and foreign bearing enterprise occupies the most market share of china's automobile wheel hub bearing.
In recent years, due to the rapid development of piezoelectric ceramic materials and power ultrasonic technology, ultrasonic suspension bearings based on ultrasonic near-field suspension technology have come into force and show good application prospects. The ultrasonic suspension bearing belongs to a non-contact bearing, supports a shaft by utilizing ultrasonic vibration, is slightly more complex in structure than a common non-contact bearing, and has more advantages in service performance. Compared with a hydrostatic lubrication bearing, the ultrasonic suspension bearing does not need an air supply device and lubrication, and a control system is simple; compared with a fluid dynamic pressure lubrication bearing, the bearing has the same bearing capacity in the starting and low-speed stages, and has good centering performance and stability; compared with a magnetic suspension bearing, the limit rotating speed of the bearing system is higher, the thickness of the air mould is small, and the adjustment can be carried out.
At present, the research of scholars at home and abroad is basically the research on the ultrasonic suspension bearing on the basis of a small-size shaft, and the research proves that the ultrasonic suspension bearing can actually reduce the friction between shaft systems. However, the technology is not applied to actual electric vehicles at present.
Disclosure of Invention
Under the condition that normal running of the electric automobile is not influenced, the ultrasonic suspension bearing is applied to the field of the electric automobile, the purpose of reducing friction between automobile shafting is achieved, and the service life of the bearing is prolonged. The invention discloses an ultrasonic suspension hub bearing of an electric automobile, which is used for replacing a double-row angular contact ball bearing used by the current electric automobile.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an ultrasonic suspension hub bearing of an electric automobile comprises a piezoelectric transducer, a bearing box and a retainer assembly; the number of the piezoelectric transducers is 6, and every two piezoelectric transducers are arranged on 3 small box bodies of the bearing box in groups and divided into 3 groups along the circumferential direction; the retainer assembly is arranged in the circular through hole of the bearing box;
the piezoelectric transducer comprises a radiation head, an amplitude transformer, an insulating sleeve, a rear cover plate and a prestressed bolt;
the outer end surface of the radiation head is a circular plane, and the inner end surface of the radiation head is an inward concave arc surface; the outer end of the radiation head is connected with the amplitude transformer; the outer end of the amplitude transformer is provided with a flange plate; the prestressed bolt sequentially penetrates through the rear cover plate and the insulating sleeve from outside to inside and then is connected with the amplitude transformer; four axial through holes are uniformly distributed on the flange plate; the ceramic electrode assembly is nested on the insulating sleeve; the ceramic electrode assembly is formed by connecting four electrode plates and four piezoelectric ceramic plates in series at intervals; the piezoelectric ceramic piece is a ring body;
the bearing box comprises a hexagonal box body and three small box bodies, the hexagonal box body comprises six planes at the periphery and two front and rear end faces, and the three small box bodies are respectively fixed on the three planes at intervals at the periphery of the hexagonal box body; the hexagonal box body is provided with a fan-shaped connecting arm, one end of the fan-shaped connecting arm is fixed on the hexagonal box body, and the other end of the fan-shaped connecting arm is connected with a braking device of the electric automobile double-fork-arm suspension system;
a circular through hole penetrates through the hexagonal box body from the center of the front end face to the center of the rear end face, and the circular through hole is used for the inner flange of the hub bearing and the inner ring of the hub bearing to penetrate through; 4 annular roller paths are axially arranged in the circular through hole, wherein the 4 roller paths comprise two outer annular roller paths and two inner annular roller paths, the axial positions of the two outer annular roller paths are symmetrical about the front central plane and the rear central plane of the hexagonal box body, and the axial positions of the two inner annular roller paths are symmetrical about the front central plane and the rear central plane of the hexagonal box body; the annular diameters of the two outer annular roller paths are equal, and the annular diameters of the two inner annular roller paths are equal and smaller than the annular diameter of the outer annular roller path;
two round holes are axially arranged on each small box body and used for mounting a piezoelectric transducer; the inner end surface of a radiation head of the piezoelectric transducer is matched with the inner flange of the hub bearing and the inner ring of the hub bearing; the piezoelectric transducer is fixed on the small box body through a flange and a bolt;
the retainer assembly comprises two groups of large retainers, two groups of small retainers, balls and retainer fastening bolts, wherein the large retainers are arranged on the outer annular roller path through the retainer fastening bolts and keep the balls on the outer annular roller path, and the small retainers are arranged on the inner annular roller path through the retainer fastening bolts and keep the balls on the inner annular roller path.
Furthermore, the cross section of the hexagonal box body is an equilateral hexagon.
Furthermore, mounting grooves are formed in two sides of the outer annular roller path and used for mounting a large-size retainer; and mounting grooves are formed in two sides of the inner annular roller path and used for mounting the small-sized retainer.
Furthermore, the large-scale retainer consists of three large-scale arc-shaped retainers with the same structure, the three large-scale arc-shaped retainers are uniformly distributed along the circumferential direction, a gap is reserved between every two adjacent large-scale arc-shaped retainers, and 3 pockets are uniformly distributed on each large-scale arc-shaped retainer; the small-sized retainer consists of three small-sized arc-shaped retainers with the same structure, the three small-sized arc-shaped retainers are uniformly distributed along the circumferential direction, a gap is reserved between every two adjacent small-sized arc-shaped retainers, and 2 pockets are uniformly distributed on each small-sized arc-shaped retainer; the radian of the gap between the large arc-shaped retainers is equal to that of the gap between the small arc-shaped retainers; gaps of the two groups of large retainers and the two groups of small retainers are aligned along the axial direction and correspond to the round holes on the small box body, and the gaps are used for installing piezoelectric transducers; a ball is mounted in each pocket.
Furthermore, the pocket is designed to be in an inward concave arc shape.
Further, the sizes of the balls are all equal.
Further, the axial lines of the prestressed bolt, the rear cover plate, the amplitude transformer and the radiation head are collinear.
Furthermore, the hexagonal box body and the three small box bodies are of an integral structure and are manufactured by a casting method.
Furthermore, 4 threaded holes are uniformly distributed in the circumferential direction around the through hole of the small box body, and the piezoelectric transducer penetrates through 4 axial through holes in the flange through a transducer fastening bolt and is installed in the small box body.
Further, the outer end of the piezoelectric transducer is provided with a net cover, and the net cover is installed on the small box body through a net cover fastening bolt.
Further, the amplitude transformer and the radiation head are of an integral structure.
Further, the inner ring of the hub bearing is arranged on the inner flange of the hub bearing, and the axes of the inner ring and the inner flange are collinear.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can reduce the friction between shafts by utilizing the antifriction characteristic of ultrasonic vibration and reduce the friction heat generated in the operation process, and the aspects of the limit rotating speed, the precision, the service life and the like of the invention are superior to the double-row angular contact ball bearing used by the prior electric automobile. The bearing is convenient to overhaul and low in replacement cost.
2. The invention utilizes the retainer to limit the relative movement of the balls, and the balls can only realize autorotation between the large retainer and the annular roller path or between the small retainer and the annular roller path. Therefore, when the electric quantity of the electric automobile is not enough to support suspension or antifriction, the ultrasonic suspension hub bearing can still play the role of a double-row angular contact ball bearing.
3. The invention has strong adaptability to the environment, is not interfered by electromagnetism in the running process of the electric automobile, and does not need to use a large amount of auxiliary equipment required by bearing technologies such as hydraulic pressure, air pressure, magnetic suspension and the like.
Drawings
Fig. 1 is a schematic structural diagram of an ultrasonic suspension hub bearing.
Fig. 2 is a front view of the section a-a of fig. 1.
Fig. 3 is a top view of an ultrasonic levitation hub bearing.
Fig. 4 is a front view of the section B-B of fig. 3.
Fig. 5 is a left side view of the ultrasonic levitation hub bearing.
Fig. 6 is a schematic diagram of a piezoelectric transducer.
Fig. 7 is a front view of the section a-a of fig. 6.
Fig. 8 is a left side view of the piezoelectric transducer.
Fig. 9 is a schematic structural view of a large-sized cage.
Fig. 10 is a front view of the section a-a of fig. 9.
Fig. 11 is a right side view of fig. 9.
Fig. 12 is a rear view of fig. 9.
Fig. 13 is a schematic structural view of a small-sized cage.
Fig. 14 is a front view of section a-a of fig. 13.
Fig. 15 is a right side view of fig. 13.
Fig. 16 is a rear view of fig. 13.
Fig. 17 is a schematic structural view of a bearing housing.
Fig. 18 is a front view in half section a-a of fig. 17.
Fig. 19 is a top view of fig. 17.
Fig. 20 is a front view in half section B-B of fig. 19.
In the figure: 1. the hub bearing comprises a net cover, 2, a bearing box, 3, a piezoelectric transducer, 4, a hub bearing inner flange, 5, a ball, 6, a hub bearing inner ring, 7, a large-scale retainer, 8, a radiation head, 9, a horn, 10, an insulating sleeve, 11, an electrode plate, 12, a piezoelectric ceramic plate, 13, a prestressed bolt, 14, a rear cover plate, 15, a small-scale retainer, 16, a retainer fastening bolt, 17, a transducer fastening bolt, 18 and a net cover fastening bolt.
Detailed Description
The invention is further described below with reference to the accompanying drawings. As shown in fig. 1 to 20, an ultrasonic suspension hub bearing for an electric vehicle comprises a piezoelectric transducer 3, a bearing box 2 and a holder assembly; the number of the piezoelectric transducers 3 is 6, and every two piezoelectric transducers are arranged on 3 small box bodies of the bearing box 2 in groups and 3 groups along the circumferential direction; the retainer assembly is arranged in a circular through hole of the bearing box 2;
the piezoelectric transducer 3 comprises a radiation head 8, an amplitude transformer 9, an insulating sleeve 10, a rear cover plate 14 and a prestressed bolt 13;
the outer end surface of the radiation head 8 is a circular plane, and the inner end surface is an inward concave arc surface; the outer end of the radiation head 8 is connected with an amplitude transformer 9; the outer end of the amplitude transformer 9 is provided with a flange plate; the prestressed bolt 13 sequentially penetrates through the rear cover plate 14 and the insulating sleeve 10 from outside to inside and then is connected with the amplitude transformer 9; four axial through holes are uniformly distributed on the flange plate; the ceramic electrode assembly is nested on the insulating sleeve 10; the ceramic electrode assembly is formed by connecting four electrode plates 11 and four piezoelectric ceramic plates 12 in series at intervals; the piezoelectric ceramic piece 12 is a torus;
the bearing box 2 comprises a hexagonal box body and three small box bodies, the hexagonal box body comprises six planes at the periphery and two front and rear end faces, and the three small box bodies are respectively fixed on the three planes at intervals at the periphery of the hexagonal box body; the hexagonal box body is provided with a fan-shaped connecting arm, one end of the fan-shaped connecting arm is fixed on the hexagonal box body, and the other end of the fan-shaped connecting arm is connected with a braking device of the electric automobile double-fork-arm suspension system;
a circular through hole penetrates through the hexagonal box body from the center of the front end face to the center of the rear end face, and the circular through hole is used for the inner flange 4 of the hub bearing and the inner ring 6 of the hub bearing to penetrate through; 4 annular roller paths are axially arranged in the circular through hole, wherein the 4 roller paths comprise two outer annular roller paths and two inner annular roller paths, the axial positions of the two outer annular roller paths are symmetrical about the front central plane and the rear central plane of the hexagonal box body, and the axial positions of the two inner annular roller paths are symmetrical about the front central plane and the rear central plane of the hexagonal box body; the annular diameters of the two outer annular roller paths are equal, and the annular diameters of the two inner annular roller paths are equal and smaller than the annular diameter of the outer annular roller path;
two round holes are axially arranged on each small box body and used for mounting the piezoelectric transducer 3; the inner end surface of a radiation head 8 of the piezoelectric transducer 3 is matched with the hub bearing inner flange 4 and the hub bearing inner ring 6; the piezoelectric transducer 3 is fixed on the small box body through a flange and a bolt;
the retainer assembly comprises two groups of large retainers 7, two groups of small retainers 15, balls 5 and retainer fastening bolts 16, wherein the large retainers 7 are mounted on the outer annular raceways through the retainer fastening bolts 16 and hold the balls 5 on the outer annular raceways, and the small retainers 15 are mounted on the inner annular raceways through the retainer fastening bolts 16 and hold the balls 5 on the inner annular raceways.
Furthermore, the cross section of the hexagonal box body is an equilateral hexagon.
Furthermore, mounting grooves are formed in two sides of the outer annular roller path and used for mounting the large retainer 7; and mounting grooves are formed in two sides of the inner annular roller path and used for mounting the small retainer 15.
Furthermore, the large-scale retainer 7 consists of three large-scale arc-shaped retainers with the same structure, the three large-scale arc-shaped retainers are uniformly distributed along the circumferential direction, a gap is reserved between every two adjacent large-scale arc-shaped retainers, and 3 pockets are uniformly distributed on each large-scale arc-shaped retainer; the small-sized retainers 15 are composed of three small-sized arc-shaped retainers with the same structure, the three small-sized arc-shaped retainers are uniformly distributed along the circumferential direction, gaps are reserved between the adjacent small-sized arc-shaped retainers, and 2 pockets are uniformly distributed on each small-sized arc-shaped retainer; the radian of the gap between the large arc-shaped retainers is equal to that of the gap between the small arc-shaped retainers; gaps of the two groups of large-scale retainers 7 and the two groups of small-scale retainers 15 are aligned along the axial direction and correspond to the round holes on the small box body, and the gaps are used for installing the piezoelectric transducers 3; a ball 5 is mounted in each pocket.
Furthermore, the pocket is designed to be in an inward concave arc shape.
Further, the balls 5 are all equal in size.
Further, the axes of the pre-stressing bolt 13, the back cover plate 14, the horn 9 and the radiation head 8 are collinear.
Furthermore, the hexagonal box body and the three small box bodies are of an integral structure and are manufactured by a casting method.
Furthermore, 4 threaded holes are circumferentially and uniformly distributed around the through hole of the small box body, and the piezoelectric transducer 3 passes through 4 axial through holes on the flange through a transducer fastening bolt 17 and is installed in the small box body.
Furthermore, the outer end of the piezoelectric transducer 3 is provided with a net cover 1, and the net cover 1 is installed on the small box body through a net cover fastening bolt 18.
Further, the horn 9 and the radiation head 8 are of unitary construction.
Further, the hub bearing inner ring 6 is arranged on the hub bearing inner flange 4, and the axes of the hub bearing inner ring and the hub bearing inner flange are collinear.
The working principle of the invention is as follows:
the ultrasonic waves have friction reducing properties and transmissibility. The piezoelectric transducer 3 generates high-frequency ultrasonic waves by generating high-frequency stretching deformation vibration by using the inverse piezoelectric effect of the piezoelectric ceramic sheet 12. The ultrasonic vibration of the piezoelectric transducer 3 having the longitudinal vibration mode has a large influence on the friction coefficient, and when the amplitude is small (a <0.5 μm), the vibration is insufficient to form a favorable factor for lowering the friction coefficient due to the influence of the surface roughness; when the amplitude is gradually increased (0.5 μm < A <5 μm), the ultrasonic vibration gradually forms the friction reducing capability, so that the friction coefficient is rapidly reduced; when the amplitude continues to increase, a >5 μm, the friction coefficient hardly decreases any more. In order to ensure that the piezoelectric transducer 3 can achieve the effect of reducing friction between shafting when generating ultrasonic vibration, the piezoelectric transducer 3 is designed so that the front end face amplitude is not less than 5 μm.
When the electric quantity of the electric automobile is sufficient, the piezoelectric transducers 3 in the bearing box 2 are connected with a power supply, 6 piezoelectric transducers 3 start to work simultaneously to generate ultrasonic vibration, ultrasonic waves generated by the vibration act on the radiation head 8 and then are transmitted between the concave arc surface of the radiation head 8 and an axle, and the designed ultrasonic suspension bearing realizes the effect of reducing the inter-axle friction by utilizing the antifriction characteristic of the ultrasonic waves; when the electric quantity is not enough to support suspension and antifriction, the inner flange 4 of the hub bearing and the inner ring 6 of the hub bearing are in contact with the ball 5, and the ultrasonic suspension hub bearing can still play the role of a double-row angular contact ball bearing.
The present invention is not limited to the embodiment, and any equivalent idea or change within the technical scope of the present invention is to be regarded as the protection scope of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010261068.0A CN111306188B (en) | 2020-04-03 | 2020-04-03 | Electric automobile supersound suspension wheel hub bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010261068.0A CN111306188B (en) | 2020-04-03 | 2020-04-03 | Electric automobile supersound suspension wheel hub bearing |
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| CN111306188A CN111306188A (en) | 2020-06-19 |
| CN111306188B true CN111306188B (en) | 2021-12-17 |
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| WO2004099747A1 (en) * | 2003-05-06 | 2004-11-18 | Ntn Corporation | Sensor-integrated bearing for wheel |
| EP1988376A3 (en) * | 2007-05-01 | 2010-12-15 | JTEKT Corporation | Rolling bearing device with sensor |
| CN104245382A (en) * | 2012-03-26 | 2014-12-24 | 舍弗勒技术有限两合公司 | Wheel hub motor with potential equalization |
| CN104454976A (en) * | 2014-11-21 | 2015-03-25 | 南京冠盛汽配有限公司 | High-speed high-bearing hub bearing unit |
| CN204628280U (en) * | 2015-05-25 | 2015-09-09 | 新昌县开源汽车轴承有限公司 | A kind of heavily loaded multiple row spherical structure automobile hub bearing |
| CN107035769A (en) * | 2017-03-24 | 2017-08-11 | 南京航空航天大学 | A kind of contactless hub-bearing unit and its magnetic force control method |
| CN107269697A (en) * | 2017-07-07 | 2017-10-20 | 哈尔滨工业大学 | It is a kind of to bear the ultrasound suspending bearing of radial and axial load simultaneously |
| CN108223574A (en) * | 2018-01-15 | 2018-06-29 | 大连交通大学 | A kind of bullet train radial ultrasonic suspension bearing |
| CN108612752A (en) * | 2018-06-25 | 2018-10-02 | 南京航空航天大学 | Electromagnetic suspension hub-bearing unit |
| CN110454500A (en) * | 2019-07-19 | 2019-11-15 | 南京航空航天大学 | Magnetic suspension hub bearing and its magnetic force control method |
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| CN111306188A (en) | 2020-06-19 |
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Effective date of registration: 20240613 Address after: 056000 south of bearing Avenue, Guantao County, Handan City, Hebei Province Patentee after: Hebei Jiangbei Bearing Manufacturing Co.,Ltd. Country or region after: China Address before: 116028 No. 794, the Yellow River Road, Shahekou District, Liaoning, Dalian Patentee before: Dalian Jiaotong University Country or region before: China |
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Denomination of invention: A type of ultrasonic suspension wheel hub bearing for electric vehicles Granted publication date: 20211217 Pledgee: Bank of China Limited by Share Ltd. Handan branch Pledgor: Hebei Jiangbei Bearing Manufacturing Co.,Ltd. Registration number: Y2024980052322 |
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