Car hub unit power bearing provided with middle ball

文档序号：984751 发布日期：2020-11-06 浏览：34次中文

阅读说明：本技术 一种设置中置球的轿车轮毂单元动力轴承 (Car hub unit power bearing provided with middle ball ) 是由孟萍于 2019-05-06 设计创作，主要内容包括：本发明涉及轿车轮毂单元轴承,提出了一种设置中置球的轿车轮毂单元动力轴承,包括：一个变径中圈、一个外半外套圈、一个内半内套圈、一个轮毂轴、一个外套圈和内外两层滚动体,变径中圈在其内圆周的中部设有双列角接触球形滚动体轨道,轨道内各设置球形滚动体,形成中置球结构,在变径中圈外圆周的两端间隔距离各设有一圈角接触球形滚动体轨道,轨道内各设置球形滚动体,使变径中圈在内外两层球形滚动体之间对称变径,使其变径中圈与内外两层滚动体相切点处的切线形成切向拉力线,变径中圈通过内层滚动体与轮毂轴组合,并通过外层滚动体与外套圈组合形成设置中置球的轿车轮毂单元动力轴承,本发明通过中置球的平衡性和轴承的动力学结构原理,以提高轴承的高速稳定性,实现高速低摩擦、低温升、长寿命。(The invention relates to a car hub unit bearing, and provides a car hub unit power bearing with a middle ball, which comprises: the invention relates to a diameter-variable middle ring, an outer half outer ring, an inner half inner ring, a hub shaft, an outer ring and an inner layer and an outer layer of rolling bodies, wherein the diameter-variable middle ring is provided with a double-row angular contact spherical rolling body track in the middle of the inner circumference thereof, spherical rolling bodies are respectively arranged in the track to form a middle ball structure, two angular contact spherical rolling body tracks are respectively arranged at two ends of the outer circumference of the diameter-variable middle ring at intervals, the spherical rolling bodies are respectively arranged in the tracks, the diameter-variable middle ring is symmetrically changed between the inner layer and the outer layer of spherical rolling bodies, a tangential tension line is formed by a tangent point of the diameter-variable middle ring and the inner layer and the outer layer of rolling bodies, the diameter-variable middle ring is combined with the hub shaft through the inner layer of rolling bodies, and a power bearing of a car hub unit provided with a middle ball is, the high-speed stability of the bearing is improved, and the high-speed low-friction, low-temperature rise and long service life are realized.)

1. A car hub unit power bearing with a centrally-mounted ball comprises: a reducing middle ring, an outer half outer ring, an inner half inner ring, an outer ring, a hub shaft and inner and outer two-layer rolling elements, characterized by: the distance between the middle parts of the inner and outer circumferences of the reducing middle ring is respectively provided with a deep groove spherical rolling body track, spherical rolling bodies are respectively arranged in the deep groove spherical rolling body tracks, the reducing middle ring is reduced between the inner and outer layers of spherical rolling bodies, the diameter of the deep groove spherical rolling body track on the inner circumference of the reducing middle ring is larger than or equal to the diameter of the deep groove spherical rolling body track on the outer circumference of the reducing middle ring, a tangential tension line is formed by a tangent line at the tangent point of the reducing middle ring and the inner and outer layers of spherical rolling bodies, a circle of cylindrical roller track is respectively arranged at the distance between the two ends of the deep groove spherical rolling body track on the middle parts of the inner and outer circumferences of the reducing middle ring, cylindrical rollers are respectively arranged,

the middle part of the inner circumference of the outer half outer ring is provided with a circle of cylindrical roller track, the inner end of the cylindrical roller track is provided with a cylindrical roller inner stop shoulder, the outer end of the cylindrical roller track is provided with a cylindrical roller outer stop shoulder, the end of the inner circumference of the cylindrical roller inner stop shoulder is provided with a circle of angular contact spherical rolling element track,

the middle part of the outer circumference of the inner half inner ring is provided with a circle of cylindrical roller track, the inner end of the cylindrical roller track is provided with a cylindrical roller inner stop shoulder, the outer end of the cylindrical roller track is provided with a cylindrical roller outer stop shoulder, the end head of the outer circumference of the cylindrical roller inner stop shoulder is provided with a circle of angular contact spherical rolling element track,

the outer ring is coaxially provided with a ring of flange plate in the middle of the outer circumference, the diameter of the inner circumference of the outer ring from the axial direction to the outer section is smaller than that of the inner circumference of the inner section, the middle of the outer section of the inner circumference of the outer ring is provided with a ring of cylindrical roller track, the inner end of the cylindrical roller track is provided with a cylindrical roller inner stop shoulder, the outer end of the cylindrical roller track is provided with a cylindrical roller outer stop shoulder, the end of the inner circumference of the cylindrical roller inner stop shoulder is provided with a ring of angular contact spherical rolling element track, the outer half outer ring is coaxially provided with the inner section of the inner circumference of the outer ring, the cylindrical roller track arranged at the inner circumference of the outer ring and the cylindrical roller track arranged at the middle of the inner circumference of the outer half outer ring of the outer ring respectively correspond to the cylindrical roller tracks arranged at the two ends of the outer circumference of the variable diameter middle ring, and the inner circumference The spherical rolling body track corresponds to the deep groove spherical rolling body track arranged in the middle of the outer circumference of the reducing middle ring, and the spherical rolling bodies arranged in the deep groove spherical rolling body track in the middle of the outer circumference of the reducing middle ring are combined through the cylindrical rollers arranged in the cylindrical roller tracks at the two ends of the outer circumference of the reducing middle ring and the spherical rolling bodies arranged in the deep groove spherical rolling body track in the middle of the outer circumference of the reducing middle ring respectively to form an,

the hub shaft is of a cylindrical structure, a flange plate is coaxially arranged on the outer circumference of the outer end of the hub shaft, the inner end of the flange plate enables the diameter of the outer section of the outer circumference of the hub shaft to be larger than the diameter of the outer circumference of the inner section, a circle of cylindrical roller track is arranged in the middle of the outer circumference of the outer section of the hub shaft, a cylindrical roller inner stop shoulder is arranged at the inner end of the cylindrical roller track, a cylindrical roller outer stop shoulder is arranged at the outer end of the cylindrical roller track, a circle of angular contact spherical rolling element track is arranged at the end head of the outer circumference of the cylindrical roller inner stop shoulder, an inner half inner ring is coaxially arranged at the inner section of the outer circumference of the hub shaft, the cylindrical roller track arranged on the outer circumference of the hub shaft and the circle of cylindrical roller track arranged on the middle ring outer circumference of the inner half inner ring respectively correspond to the cylindrical roller tracks arranged at two ends of the inner circumference of the inner stop of the variable diameter A circle of angular contact spherical rolling body tracks arranged at the ends of the outer circumference of the shoulder correspond to the deep groove spherical rolling body tracks arranged in the middle of the inner circumference of the reducing middle ring, and cylindrical rollers arranged in the cylindrical roller tracks at the two ends of the inner circumference of the reducing middle ring and spherical rolling bodies arranged in the deep groove spherical rolling body tracks in the middle of the inner circumference of the reducing middle ring are combined to form the power bearing of the car hub unit with the central balls.

2. A car hub unit power bearing with a centrally-mounted ball comprises: a reducing middle ring, an outer half outer ring, an inner half inner ring, an outer ring, a hub shaft and inner and outer two-layer rolling elements, characterized by: the diameter-variable middle ring is provided with a circle of deep groove spherical rolling body track in the middle of the inner circumference thereof, spherical rolling bodies are arranged in the deep groove spherical rolling body track, a circle of cylindrical roller track is respectively arranged at the two ends of the deep groove spherical rolling body track at intervals, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of angular contact spherical rolling body track is respectively arranged at the two ends of the outer circumference of the diameter-variable middle ring at intervals, the spherical rolling bodies are respectively arranged in the two circles of angular contact spherical rolling body tracks, the diameter of the diameter-variable middle ring between the inner layer of spherical rolling bodies and the outer layer of spherical rolling bodies is symmetrically reduced, the diameter of the deep groove spherical rolling body track at the inner circumference of the diameter-variable middle ring is larger than or equal to the diameter of the angular contact spherical rolling body track at the outer circumference of the diameter-,

the middle part of the inner circumference of the outer half outer ring is provided with a circle of angular contact spherical rolling body track, the outer end of the angular contact spherical rolling body track is provided with a spherical rolling body outer retaining shoulder,

the outer ring is provided with a ring flange in the middle of the outer circumference, the axial distance between the outer section and the inner circumference of the outer ring is smaller than the diameter of the inner circumference of the inner section, the middle of the outer section of the inner circumference of the outer ring is provided with a ring of angular contact spherical rolling element tracks, the outer ends of the angular contact spherical rolling element tracks are provided with outer blocking shoulders of the spherical rolling elements, the outer half outer ring is coaxially arranged at the inner section of the inner circumference of the outer ring, the outer ring is combined by the angular contact spherical rolling element tracks arranged at the outer section of the inner circumference and the ring of angular contact spherical rolling element tracks arranged at the middle of the inner circumference of the outer half outer ring through spherical rolling elements arranged in two rings of angular contact spherical rolling element tracks,

the hub shaft is of a cylindrical structure, a flange plate is coaxially arranged on the outer circumference of the outer end of the hub shaft, the inner end of the flange plate enables the diameter of the outer section of the outer circumference of the hub shaft to be larger than the diameter of the outer circumference of the inner section, a circle of cylindrical roller track is arranged in the middle of the outer circumference of the outer section of the hub shaft, a cylindrical roller inner stop shoulder is arranged at the inner end of the cylindrical roller track, a cylindrical roller outer stop shoulder is arranged at the outer end of the cylindrical roller track, a circle of angular contact spherical rolling element track is arranged at the end head of the outer circumference of the cylindrical roller inner stop shoulder, an inner half inner ring is coaxially arranged at the inner section of the outer circumference of the hub shaft, the cylindrical roller track arranged on the outer section of the outer circumference of the hub shaft and the circle of cylindrical roller track arranged on the middle ring outer circumference of the inner half inner ring respectively correspond to the cylindrical roller tracks arranged at two ends of the inner circumference of the variable diameter A circle of angular contact spherical rolling body tracks arranged at the ends of the outer circumference of the gear shoulder correspond to the deep groove spherical rolling body tracks arranged in the middle of the inner circumference of the reducing middle ring, and cylindrical rollers arranged in the cylindrical roller tracks at the two ends of the inner circumference of the reducing middle ring are combined with spherical rolling bodies arranged in the deep groove spherical rolling body tracks in the middle of the inner circumference of the reducing middle ring respectively to form the power bearing of the car hub unit with the central ball.

3. A car hub unit power bearing with a centrally-mounted ball comprises: a reducing middle ring, an outer half outer ring, an inner half inner ring, an outer ring, a hub shaft and inner and outer two-layer rolling elements, characterized by: the diameter-variable middle ring is provided with a circle of deep groove spherical rolling body track in the middle of the outer circumference thereof, spherical rolling bodies are arranged in the deep groove spherical rolling body track, a circle of cylindrical roller track is respectively arranged at the two ends of the deep groove spherical rolling body track at intervals, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of angular contact spherical rolling body track is respectively arranged at the two ends of the inner circumference of the diameter-variable middle ring at intervals, spherical rolling bodies are respectively arranged in the angular contact spherical rolling body tracks, the diameter of the diameter-variable middle ring is symmetrically reduced between the inner layer of spherical rolling bodies and the outer layer of spherical rolling bodies, the diameter of the angular contact spherical rolling body track on the inner circumference of the diameter-variable middle ring is larger than or equal to the diameter of the deep groove spherical rolling body track on the outer circumference of the diameter-variable,

the middle part of the outer circumference of the inner half inner ferrule is provided with a circle of angular contact spherical rolling element track, the outer end of the angular contact spherical rolling element track is provided with a circle of spherical rolling element outer retaining shoulder,

the outer ring is provided with a ring of flange plate in the middle of the outer circumference, the axial distance between the outer section and the inner circumference of the outer ring is smaller than the diameter of the inner circumference of the inner section, a ring of cylindrical roller track is arranged in the middle of the outer section of the inner circumference of the outer ring, a cylindrical roller inner stop shoulder is arranged at the inner end of the cylindrical roller track, a cylindrical roller outer stop shoulder is arranged at the outer end of the cylindrical roller track, a ring of angular contact spherical rolling element tracks are arranged at the end of the inner circumference of the cylindrical roller inner stop shoulder, an outer half outer ring is coaxially arranged at the inner section of the inner circumference of the outer ring, the cylindrical roller track arranged at the inner circumference of the outer ring and the ring of cylindrical roller track arranged at the middle of the inner circumference of the outer half outer ring of the outer ring are respectively corresponding to the cylindrical roller tracks arranged at the two ends of the outer circumference of the variable diameter middle ring, and a ring of The dynamic body orbit corresponds to the deep groove spherical rolling body orbit arranged in the middle of the outer circumference of the reducing middle ring, and forms the outer layer bearing structure of the dynamic bearing by respectively combining the cylindrical rollers arranged in the cylindrical roller orbits at the two ends of the outer circumference of the reducing middle ring and the spherical rolling bodies arranged in the deep groove spherical rolling body orbit in the middle of the outer circumference of the reducing middle ring,

4. A car hub unit power bearing with a centrally-mounted ball comprises: the variable diameter inner ring, the outer half outer ring, the inner half inner ring, the outer ring, the hub shaft and the inner and outer spherical rolling bodies are characterized in that: the diameter of the inner circumference double-row angular contact spherical rolling element track of the reducing middle ring is larger than or equal to the diameter of the outer circumference angular contact spherical rolling element track of the reducing middle ring, and a tangential tension line is formed by a tangent line at the tangent point of the reducing middle ring and the inner and outer layers of spherical rolling elements,

5. The power bearing of a car hub unit with a central ball according to claim 4, wherein: the diameter-variable middle ring is provided with two circles of double-row angular contact spherical rolling element tracks in the middle of the outer circumference thereof, spherical rolling elements are respectively arranged in the double-row angular contact spherical rolling element tracks, a circle of angular contact spherical rolling element tracks are respectively arranged at intervals at two ends of the inner circumference of the diameter-variable middle ring, the spherical rolling elements are respectively arranged in the angular contact spherical rolling element tracks, so that the diameter of the inner circumference angular contact spherical rolling element track of the diameter-variable middle ring is larger than or equal to the diameter of the outer circumference double-row angular contact spherical rolling element track of the diameter-variable middle ring, and tangential tension lines are formed by tangential lines at tangential points of the diameter-variable middle ring and the inner and outer layers of rolling elements,

the outer race is combined by two circles of spherical rolling bodies arranged in two circles of double-row angular contact spherical rolling body tracks in the middle of the outer circumference of the reducing middle ring respectively,

the angular contact spherical rolling element track arranged on the outer section of the outer circumference of the hub shaft and the circle of angular contact spherical rolling element track arranged in the middle of the outer circumference of the inner half inner ring are respectively combined through spherical rolling elements arranged in two circles of angular contact spherical rolling element tracks on the two ends of the inner circumference of the reducing middle ring to form the power bearing of the car hub unit with the middle ball.

6. A car hub unit power bearing with a centrally-mounted ball comprises: a combination formula reducing center ring, a balance sleeve, an interior half inner ring, an outer lasso, a wheel hub axle and inside and outside two-layer spherical rolling element, characterized by: the combined type reducing middle ring is formed by two double-half reducing middle rings which are combined through coaxial interference of a balance sleeve seat arranged at the inner end of the inner circumference and a balance sleeve, a circle of angular contact spherical rolling element tracks are respectively arranged at the two ends of the inner circumference of the combined type reducing middle ring at intervals, spherical rolling elements are respectively arranged in the angular contact spherical rolling element tracks, two circles of double-row angular contact spherical rolling element tracks are arranged in the middle of the outer circumference of the combined type reducing middle ring, the spherical rolling elements are respectively arranged in the double-row angular contact spherical rolling element tracks, the combined type reducing middle ring is symmetrically reduced between the inner layer of spherical rolling element and the outer layer of spherical rolling element, the diameter of the inner circumference of the reducing middle ring is larger than or equal to the diameter of the outer circumference of the reducing middle ring, and tangential tension lines are formed at the tangential points of the reducing middle ring and the inner,

the middle part of the outer circumference of the inner half inner ferrule is provided with a circle of angular contact spherical rolling element track, the outer end of the angular contact spherical rolling element track is provided with a spherical rolling element outer retaining shoulder,

the outer ring is provided with a ring of flange plate in the middle of the outer circumference, the middle of the inner circumference of the outer ring is provided with two rings of angular contact spherical rolling element tracks, the two rings of angular contact spherical rolling element tracks arranged in the middle of the inner circumference of the outer ring are respectively combined by spherical rolling elements arranged in the two rings of double-row angular contact spherical rolling element tracks in the middle of the outer circumference of the combined reducing middle ring to form an outer layer bearing structure of the power bearing,

7. A car hub unit power bearing with a centrally-mounted ball comprises: a reducing middle ring, an outer half outer ring, an inner half inner ring, an outer ring, a hub shaft and inner and outer two-layer rolling elements, characterized by: the reducing middle ring is provided with a circle of deep groove spherical rolling body track in the middle of the outer circumference thereof, spherical rolling bodies are arranged in the deep groove spherical rolling body track, a circle of cylindrical roller track is respectively arranged at the interval distance of the two ends of the deep groove spherical rolling body track, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of tapered roller track is respectively arranged at the interval distance of the two ends of the inner circumference of the reducing middle ring, tapered rollers are respectively arranged in the tapered roller tracks,

the middle part of the outer circumference of the inner half inner ring is provided with a circle of tapered roller track, the inner end of the tapered roller track is provided with a tapered roller inner stop shoulder, the outer end of the tapered roller track is provided with a tapered roller outer stop shoulder,

the outer ring is provided with a ring of flange plate in the middle of the outer circumference, the axial distance between the outer section and the inner circumference of the outer ring is smaller than the diameter of the inner circumference of the inner section, a ring of cylindrical roller track is arranged in the middle of the outer section of the inner circumference of the outer ring, a cylindrical roller inner stop shoulder is arranged at the inner end of the cylindrical roller track, a cylindrical roller outer stop shoulder is arranged at the outer end of the cylindrical roller track, a ring of angular contact spherical rolling element track is arranged at the end of the inner circumference of the cylindrical roller inner stop shoulder, an outer half outer ring is coaxially arranged at the inner section of the inner circumference of the outer ring, the cylindrical roller track arranged at the inner circumference of the outer ring and the ring of cylindrical roller track arranged at the middle of the inner circumference of the outer half outer ring are respectively corresponding to the cylindrical roller tracks arranged at the two ends of the outer circumference of the variable diameter middle ring, and a ring of angular contact spherical rolling element The shaped rolling body track corresponds to the deep groove spherical rolling body track arranged in the middle of the outer circumference of the reducing middle ring, and the outer layer bearing structure of the power bearing is formed by respectively combining cylindrical rollers arranged in the cylindrical roller tracks at the two ends of the outer circumference of the reducing middle ring and spherical rolling bodies arranged in the deep groove spherical rolling body track in the middle of the outer circumference of the reducing middle ring,

8. A car hub unit power bearing with a centrally-mounted ball comprises: a combination formula reducing center ring, a balanced cover, two half outer collars, an inner race ring, an outer race ring, a wheel hub axle and inside and outside two-layer spherical rolling element, characterized by: the combined type reducing middle ring is formed by two double-half reducing middle rings which are combined together through a balance sleeve seat arranged at the inner end of the outer circumference and a balance sleeve in a coaxial interference manner, a circle of angular contact spherical rolling element tracks are respectively arranged at the interval distance of two ends of the outer circumference of the combined type reducing middle ring, spherical rolling elements are respectively arranged in the angular contact spherical rolling element tracks, two circles of double-row angular contact spherical rolling element tracks are arranged in the middle of the inner circumference of the combined type reducing middle ring, the spherical rolling elements are respectively arranged in the double-row angular contact spherical rolling element tracks, the combined type reducing middle ring is symmetrically reduced between the inner layer of spherical rolling element and the outer layer of spherical rolling element, the diameter of the double-row angular contact spherical rolling element track on the inner circumference of the reducing middle ring is larger than or equal to the diameter of the angular contact spherical rolling element track on the outer circumference of,

the middle part of the inner circumference of the double-half outer ring is respectively provided with a circle of angular contact spherical rolling body track, the outer end of the angular contact spherical rolling body track is respectively provided with a spherical rolling body outer retaining shoulder,

the inner ring is provided with two circles of double-row angular contact spherical rolling element tracks in the middle of the outer circumference, the inner ring combines spherical rolling elements in the two circles of double-row angular contact spherical rolling element tracks in the middle of the inner circumference of the combined reducing middle ring respectively to form a power bearing inner layer bearing structure,

the middle part of the outer circumference of the outer ring is provided with a ring of flange plate, the inner circumference of the outer ring is of a sleeve structure, two double-half outer rings are coaxially pressed on the inner circumference of the outer ring, and an outer layer bearing structure of the power bearing is formed by combining angular contact spherical rolling body tracks respectively arranged in the middle parts of the inner circumferences of the two double-half outer rings and spherical rolling bodies respectively arranged in angular contact spherical rolling tracks at two ends of the outer circumference of the combined type reducing middle ring,

the hub shaft is a circular shaft body structure with the outer end provided with a flange plate coaxially, and the circular shaft body of the hub shaft is coaxially pressed on the inner circumference of the inner ring of the power bearing to form the power bearing of the car hub unit provided with the central ball.

9. A car hub unit power bearing with a centrally-mounted ball comprises: a reducing middle ring, an outer half outer ring, an inner half inner ring, an outer ring, a hub shaft and inner and outer two-layer rolling elements, characterized by: the diameter-variable middle ring is provided with a circle of crossed elliptical spherical roller tracks in the middle of the inner circumference thereof, the curvature radius of the elliptical spherical roller tracks is larger than the radius of the elliptical spherical roller tracks, the axial sections of the inner and outer tracks of the elliptical spherical roller are in an elliptical structure, the elliptical spherical rollers are arranged in the crossed elliptical spherical roller tracks, two cylindrical roller tracks are respectively arranged at the two ends of the crossed elliptical spherical roller tracks at intervals, cylindrical rollers are respectively arranged in the cylindrical roller tracks, two angular contact spherical rolling element tracks are respectively arranged at the two ends of the outer circumference of the diameter-variable middle ring at intervals, spherical rolling elements are respectively arranged in the two angular contact spherical rolling element tracks, the diameter of the diameter-variable middle ring is symmetrically reduced between the inner layer elliptical spherical roller and the outer layer spherical rolling element, and the diameter of the crossed elliptical spherical roller tracks on the inner circumference of the diameter-variable middle ring is larger than or equal to the diameter of the outer circumference of, and the tangential tension line is formed by the tangent line at the tangent point of the variable diameter middle ring, the inner layer elliptical spherical roller and the outer layer spherical rolling body,

the inner half inner ring is provided with a circle of elliptic spherical roller track at the end head of the inner end of the outer circumference,

10. The power bearing of a car hub unit with a centrally located ball of claim 9, wherein: the circle of track adopted in the middle of the inner circumference of the reducing middle ring is a cross cylindrical spherical roller track, a cross tapered roller track or a cross circular roller track.

Technical Field

The invention relates to a bearing, in particular to a power bearing of a car hub.

Background

At present: the car bearing is still the traditional bearing with a single-layer rolling body, the rolling body of the car bearing converts all friction resistance in the rolling friction between two layers of friction pairs into friction heating, the overlarge friction resistance and the excessive abrasion of the bearing are directly caused,

disclosure of Invention

In view of the defects of the prior art, on the basis of intensive research and aiming at the problems of the car bearing, the theoretical concept of the power bearing and the mechanical structure of the central ball are provided, and the car hub unit power bearing provided with the central ball is created,

1. research and analysis of kinetic theory mechanism

The power bearing of the car hub unit with the central ball is arranged by exploring the car hub bearing unit on the basis of the research and development of the power bearing, discovering and providing the principle of a dynamic theoretical mechanism for the first time in the research field of the theoretical mechanism, filling up the international blank, and the research and development of the power bearing of the car hub unit with the central ball are realized by supporting the innovative original core technologies of 'diameter-variable middle ring for bearing tangential tension', 'dynamic structure of the central ball' and the like on the basis of long-term research and experiment and overcoming a plurality of fatal defects of the traditional three-ring bearing,

the power bearing of the car hub unit with the ball arranged therein is essentially a three-ferrule bearing which takes the friction energy generated by the friction resistance between the friction pair layers as power to drive the friction pair on the adjacent layer to rotate so as to greatly reduce the friction drag resistance of the friction pair on the active layer and the like of the adjacent layer, can convert the harmful friction heat power of about 1/2 into beneficial traction drive power,

it is clear that: a person walks forward with the same stride and the same stride frequency, and if walking on the travelator, the speed of forward walking will be about twice as fast as walking on the ground, so the distance traveled by the person walking on the travelator for the same time will certainly be about twice as long as the distance traveled on the ground, that is: the work done by people walking on the moving sidewalk with the same force and the same time is about twice more than that done by walking on the ground, certainly, the result is that the people walk on the moving sidewalk with the assistance of electric kinetic energy of the motor, the principle that the novel power bearing can reduce friction and increase efficiency is the same as the assistance principle of the moving sidewalk, but the power of the novel power bearing utilizes the friction kinetic energy generated between the bearing load and the friction pair due to friction resistance to do rotation work, thereby realizing the reduction of friction heating of the bearing and the improvement of mechanical efficiency, the energy conversion work doing principle is the same as that a train converts friction braking energy into electric energy on a long descending ramp and then uses the electric energy for a traction train, and the difference is that the novel power bearing directly converts part of interlayer friction energy into traction driving force to do traction driving mechanical work on the friction pair of the adjacent layer, the mechanical efficiency is directly and effectively improved, and the mechanical efficiency is improved,

practice proves that: the failure modes of the bearing are closely related to the high-speed rotation speed of the bearing, the friction in the high-speed rotation is the main reason of heating of the rolling bearing and is also the key factor for determining the working temperature of the bearing, under the same working condition, the biggest obstacle for restricting the high-speed rotation of the bearing is the friction abrasion and a large amount of heat energy accumulation between the contact stress and the tensile stress generated by centrifugal gravity of the rolling body in the high-speed rotation and the rolling way, the retainer and the lubricating grease in the friction distance, and the excitation vibration of the rolling body and the retainer in the high-speed operation,

according to the centrifugal force F of the bearing rolling element mv2/r ma, the centrifugal gravity of the rolling element is four times of the original gravity when the rotating speed of the bearing is doubled, and the method is clear: when the running speed of the train is increased from the past 100 km/h to the present 400 km/h, the friction resistance and abrasion of the wheel bearing of the whole train are sharply increased by 16 times,

research and experiments prove that: under the same experimental conditions, the rotation speed and the linear distance of the rotational friction of the first layer of rolling elements of the dynamic bearing are about 1/2 (reduced by one time) of the rotation speed and the linear distance of the rotational friction of the rolling elements of the traditional bearing in the rotation process; the rotation and revolution speeds of the rolling elements of the second layer and the linear distance of the rotational friction are about 1/4 (4 times less) of the rotation speed and the linear distance of the rotational friction of the rolling elements of the traditional bearing; the centrifugal force F ═ mv2/r ═ ma of the rolling elements can be obtained by substituting the formula: the friction distance, friction resistance, friction heating and abrasion between the first layer of rolling elements and the raceway, the retainer and lubricating grease are directly reduced by about 1 time, and the friction resistance and abrasion between the second layer of rolling elements and the raceway due to centrifugal gravity are directly reduced by about 16 times, which is very important: the centrifugal gravity of the rolling body can be reduced in multiples, the friction resistance and the abrasion caused by contact stress and tensile stress are reduced in multiples, the excitation vibration in the high-speed operation of the bearing is reduced in multiples, various hazards caused by the friction resistance and the abrasion are reduced, the power bearing can improve the rotating speed, reduce the friction resistance, reduce the abrasion, reduce the friction heating and guarantee a decisive important factor of the high-speed stable operation of the bearing, and the change of subversion is generated for reducing the friction resistance and the abrasion of a bearing system and improving the mechanical efficiency, for example:

(1) taking a traditional aviation bearing calculation as an example:

according to F mv2/r ma, the pitch circle of the roller track is 100 mm, when the airplane takes off, the traditional aviation bearing of the steel ball with the roller diameter of 23 mm and the weight of 60 g can be accelerated uniformly to 12000 r/min within 10 seconds, the gravity of the rolling body is calculated to be increased from 60 g to 800 times, and then is changed to 480N (about 48 kg),

it is known that: the rotational inertia force is equal to the rotational centrifugal force + the coriolis force, i.e.: f ═ m ω ^2r +2m ω V

And (3) calculating: inertia force F of traditional bearing rolling body is m omega ^2r +2m omega V480N +960N is 1440N is 144 kg

(2) Comparing the data of the novel aviation power bearing with the calculation example of the traditional aviation bearing:

because: under the same experimental conditions, the main shaft rotating speeds are the same:

the self-rotating speed, the linear distance of friction and abrasion and the friction tensile stress of the first layer of rolling elements of the novel dynamic bearing are about 1/2 (reduced by one time) of the rotating speed and the rotational friction linear distance of the rolling elements of the traditional bearing;

it is known that: the angular velocity omega of the second layer of rolling elements of the novel dynamic bearing is 1/4 of the angular velocity omega of the rolling elements of the traditional bearing, the centrifugal gravity F of the rolling elements is mv2/r ma, the centrifugal gravity of the rolling elements is 30N which is 3 kg,

it is known that: the rotational inertia force is equal to the rotational centrifugal force + the coriolis force, i.e.: f ═ m ω ^2r +2m ω V

And (3) calculating: inertia force F of second layer rolling body of novel dynamic bearing is 30N +60N is 90N is 9 kg

And (3) comparing and calculating data to display: along with the increase of the rotating speed of the rolling body, the contact stress, the tensile stress, the dragging frictional resistance, the abrasion and the friction heating loaded on the raceway by the centrifugal gravity of the rolling body are large, and the method is clear: under the same high rotating speed state, the efficiency and the performance of the bearing generate qualitative flare when the rotating speed of the rolling body of the novel power bearing is reduced by one time (namely, the centrifugal gravity is reduced by 3 times).

2. Innovation and analysis of embedded ball

Because: deep groove ball bearing, double row angular contact ball bearing all have in the joint load always keep two points contact pure rolling friction's advantage, do not have sliding friction, its coefficient of friction (0, 001- - -0, 0012) is extremely low, and have best high-speed stability ability and rigidity, have fabulous contact ratio between its raceway and the steel ball, lubricated condition is reliable, very durable, need not frequent maintenance, have bear the good performance of joint load (SKF bearing- - -P290 page), so: the invention utilizes the principle of two-point contact pure rolling friction of the deep groove ball bearing to create an important mechanical structure point of the middle ball between two sections of rollers, creates a mechanical structure taking the double-row deep groove ball bearing and the double-row angular contact ball bearing as the middle ball, combines the mechanical structure of the middle ball with the reducing middle ring to create the power bearing of the saloon car hub unit with the middle ball,

the technical scheme adopted by the invention for realizing the purpose is as follows:

a car hub unit power bearing with a centrally-mounted ball comprises: a variable diameter middle ring, an outer half outer ring, an inner half inner ring, an outer ring, a hub shaft, an inner layer of rolling body and an outer layer of rolling body, the variable-diameter middle ring is provided with a circle of deep groove spherical rolling body tracks at the middle part of the inner circumference and the outer circumference at intervals, spherical rolling bodies are respectively arranged in the deep groove spherical rolling body tracks, the diameter of the diameter-variable middle ring between the inner layer of spherical rolling bodies and the outer layer of spherical rolling bodies is changed, so that the diameter of the deep groove spherical rolling body track on the inner circumference of the diameter-variable middle ring is larger than or equal to the diameter of the deep groove spherical rolling body track on the outer circumference of the diameter-variable middle ring, and the tangential lines at the tangential points of the variable diameter middle ring and the inner and outer layers of spherical rolling bodies form tangential tension lines, a circle of cylindrical roller track is respectively arranged at the interval distance of two ends of the deep groove spherical rolling body track in the middle of the inner circumference and the outer circumference of the reducing middle ring, cylindrical rollers are respectively arranged in the cylindrical roller tracks,

the outer ring is coaxially provided with a ring of flange plate in the middle of the outer circumference, the diameter of the inner circumference of the outer ring at the axial distance from the outer section is smaller than that of the inner circumference of the inner section, the middle of the outer section of the inner circumference of the outer ring is provided with a ring of cylindrical roller track, the inner end of the cylindrical roller track is provided with a cylindrical roller inner stop shoulder, the outer end of the cylindrical roller track is provided with a cylindrical roller outer stop shoulder, the end head of the inner circumference of the cylindrical roller inner stop shoulder is provided with a ring of angular contact spherical rolling element track, the outer half outer ring is coaxially provided with the inner section of the inner circumference of the outer ring, the cylindrical roller track arranged at the inner circumference of the outer ring and the ring cylindrical roller track arranged at the middle of the inner circumference of the outer half outer ring are respectively corresponding to the cylindrical roller tracks arranged at the two ends of the outer circumference of the variable diameter middle ring, and the inner stop shoulder end head The tracks correspond to deep groove spherical rolling element tracks arranged in the middle of the outer circumference of the reducing middle ring and are respectively combined by cylindrical rollers arranged in the cylindrical roller tracks at two ends of the outer circumference of the reducing middle ring and spherical rolling elements arranged in the deep groove spherical rolling element tracks in the middle of the outer circumference of the reducing middle ring to form an outer bearing structure of the power bearing,

the hub shaft is of a cylindrical structure, a flange plate is coaxially arranged on the outer circumference of the outer end of the hub shaft, the inner end of the flange plate enables the diameter of the outer section of the outer circumference of the hub shaft to be larger than the diameter of the outer circumference of the inner section, a circle of cylindrical roller track is arranged in the middle of the outer circumference of the outer section of the hub shaft, a cylindrical roller inner stop shoulder is arranged at the inner end of the cylindrical roller track, a cylindrical roller outer stop shoulder is arranged at the outer end of the cylindrical roller track, a circle of angular contact spherical rolling element track is arranged at the end head of the outer circumference of the cylindrical roller inner stop shoulder, an inner half inner ring is coaxially arranged at the inner section of the outer circumference of the hub shaft, the cylindrical roller track arranged on the outer circumference of the hub shaft and the circle of cylindrical roller track arranged on the middle ring outer circumference of the inner half inner stop shoulder are respectively corresponding to the cylindrical roller tracks arranged at two ends of the inner circumference of the reducing middle ring, and a circle The car hub unit power bearing with the middle ball is formed by combining cylindrical rollers arranged in cylindrical roller tracks at two ends of the inner circumference of the reducing middle ring and spherical rolling bodies arranged in the deep groove spherical rolling body track in the middle of the inner circumference of the reducing middle ring.

A car hub unit power bearing with a centrally-mounted ball comprises: a diameter-variable middle ring, an outer half outer ring, an inner half inner ring, an outer ring, a hub shaft, an inner layer of rolling body and an outer layer of rolling body, wherein the diameter-variable middle ring is provided with a deep groove spherical rolling body track in the middle of the inner circumference thereof, spherical rolling bodies are arranged in the deep groove spherical rolling body track, a circle of cylindrical roller track is respectively arranged at the two ends of the deep groove spherical rolling body track at intervals, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of angular contact spherical rolling body track is respectively arranged at the two ends of the outer circumference of the diameter-variable middle ring at intervals, spherical rolling bodies are respectively arranged in the two circles of angular contact spherical rolling body tracks, so that the diameter of the diameter-variable middle ring between the inner layer of spherical rolling bodies and the outer layer of spherical rolling bodies is symmetrically reduced, and the diameter of the deep groove spherical rolling body track on the, and the tangential lines at the tangential points of the variable diameter middle ring and the inner and outer layers of spherical rolling bodies form tangential tension lines,

the hub shaft is of a cylindrical structure, a flange plate is coaxially arranged on the outer circumference of the outer end of the hub shaft, the inner end of the flange plate enables the diameter of the outer section of the outer circumference of the hub shaft to be larger than the diameter of the outer circumference of the inner section, a circle of cylindrical roller track is arranged in the middle of the outer circumference of the outer section of the hub shaft, a cylindrical roller inner stop shoulder is arranged at the inner end of the cylindrical roller track, a cylindrical roller outer stop shoulder is arranged at the outer end of the cylindrical roller track, a circle of angular contact spherical rolling element track is arranged at the end head of the outer circumference of the cylindrical roller inner stop shoulder, an inner half inner ring is coaxially arranged at the inner section of the outer circumference of the hub shaft, the cylindrical roller track arranged on the outer circumference of the hub shaft and the circle of cylindrical roller track arranged on the middle ring outer circumference of the inner half inner stop shoulder are respectively corresponding to the cylindrical roller tracks arranged at two ends of the inner circumference of the reducing middle ring, and a circle The car hub unit power bearing with the middle ball is formed by combining cylindrical rollers arranged in cylindrical roller tracks at two ends of the inner circumference of the reducing middle ring and spherical rolling bodies arranged in the deep groove spherical rolling body track in the middle of the inner circumference of the reducing middle ring.

A car hub unit power bearing with a centrally-mounted ball comprises: a diameter-variable middle ring, an outer half outer ring, an inner half inner ring, an outer ring, a hub shaft, an inner layer of rolling body and an outer layer of rolling body, wherein the diameter-variable middle ring is provided with a deep groove spherical rolling body track in the middle of the outer circumference thereof, spherical rolling bodies are arranged in the deep groove spherical rolling body track, a circle of cylindrical roller track is respectively arranged at the two ends of the deep groove spherical rolling body track at intervals, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of angular contact spherical rolling body track is respectively arranged at the two ends of the inner circumference of the diameter-variable middle ring at intervals, spherical rolling bodies are respectively arranged in the angular contact spherical rolling body tracks, the diameter-variable middle ring is symmetrically subjected to angular contact between the inner layer of spherical rolling body and the outer layer of spherical rolling body, so that the diameter of the inner circumference of the diameter-variable middle ring, and the tangential lines at the tangential points of the variable diameter middle ring and the inner and outer layers of spherical rolling bodies form tangential tension lines,

the outer ring is provided with a ring of flange plate in the middle of the outer circumference, the axial distance between the outer section and the inner circumference of the outer ring is smaller than the diameter of the inner circumference of the inner section, a ring of cylindrical roller track is arranged in the middle of the outer section of the inner circumference of the outer ring, a cylindrical roller inner stop shoulder is arranged at the inner end of the cylindrical roller track, a cylindrical roller outer stop shoulder is arranged at the outer end of the cylindrical roller track, a ring of angular contact spherical rolling element track is arranged at the end of the inner circumference of the cylindrical roller inner stop shoulder, an outer half outer ring is coaxially arranged at the inner section of the inner circumference of the outer ring, the cylindrical roller track arranged at the inner circumference of the outer ring and the ring of cylindrical roller track arranged in the middle of the inner circumference of the outer half outer ring of the outer ring respectively correspond to the cylindrical roller tracks arranged at the two ends of the outer circumference of the variable diameter middle ring, and a ring of angular contact spherical The deep groove spherical rolling body tracks arranged in the middle of the outer circumference of the diameter middle ring correspond to each other and are combined through cylindrical rollers arranged in the cylindrical roller tracks at the two ends of the outer circumference of the diameter-variable middle ring and spherical rolling bodies arranged in the deep groove spherical rolling body tracks in the middle of the outer circumference of the diameter-variable middle ring respectively to form an outer layer bearing structure of the power bearing,

A car hub unit power bearing with a centrally-mounted ball comprises: the diameter of the inner circumference of the reducing middle ring is larger than or equal to that of the outer circumference of the reducing middle ring, tangential tension lines are formed by tangents of the reducing middle ring and the inner and outer layers of spherical rolling bodies at tangential points,

the outer ring is provided with a ring flange in the middle of the outer circumference, the axial distance between the outer section and the inner circumference of the outer ring is smaller than the diameter of the inner circumference of the inner section, the middle of the outer section of the inner circumference of the outer ring is provided with a ring of angular contact spherical rolling element tracks, the outer ends of the angular contact spherical rolling element tracks are provided with spherical rolling element outer retaining shoulders, the outer half outer ring is coaxially arranged at the inner section of the inner circumference of the outer ring, the outer ring is combined by the angular contact spherical rolling element tracks arranged at the outer section of the inner circumference and the ring of angular contact spherical rolling element tracks arranged at the middle of the inner circumference of the outer half outer ring through spherical rolling elements arranged in two rings of angular contact spherical rolling element,

The utility model provides a "car wheel hub unit power bearing who sets up centre-placed ball", includes: the diameter of the inner circle of the reducing middle ring is larger than or equal to that of the outer circle of the reducing middle ring, tangential tension lines are formed by tangents of the reducing middle ring and the inner and outer layers of spherical rolling bodies at tangent points,

the outer ring is provided with a ring flange in the middle of the outer circumference, the diameter of the inner circumference of the outer ring axially away from the outer section is smaller than that of the inner circumference of the inner section, the middle of the outer section of the inner circumference of the outer ring is provided with a ring of angular contact spherical rolling element tracks, the outer ends of the angular contact spherical rolling element tracks are provided with spherical rolling element outer stop shoulders, the outer half outer ring is coaxially arranged at the inner section of the inner circumference of the outer ring, the outer ring is combined by the angular contact spherical rolling element tracks arranged at the outer section of the inner circumference and the ring of the angular contact spherical rolling element tracks arranged at the middle of the inner circumference of the outer half outer ring through spherical rolling elements arranged in two rings of double-row angular contact,

A car hub unit power bearing with a centrally-mounted ball comprises: the combined type reducing middle ring is formed by combining two double-half reducing middle rings through a balance sleeve seat arranged in the middle of the inner circumference and a balance sleeve in a coaxial interference manner to form the combined type reducing middle ring, two angular contact spherical rolling element tracks are respectively arranged at intervals at two ends of the inner circumference of the combined type reducing middle ring, the spherical rolling elements are respectively arranged in the angular contact spherical rolling element tracks, two double-row angular contact spherical rolling element tracks are arranged in the middle of the outer circumference of the combined type reducing middle ring, the spherical rolling elements are respectively arranged in the double-row angular contact spherical rolling element tracks, the combined type reducing middle ring is symmetrically reduced between the inner layer of spherical rolling elements and the outer layer of spherical rolling elements, and the diameter of the inner circumference of the reducing middle ring is larger than or equal to that of the outer circumference of the reducing middle ring, and the tangential lines at the tangential points of the variable diameter middle ring and the inner and outer layers of spherical rolling bodies form tangential tension lines,

the middle part of the outer circumference of the inner half inner ferrule is provided with a circle of angular contact spherical rolling element track, the outer end of the angular contact spherical rolling element track is provided with a spherical rolling element outer retaining shoulder,

the outer ring is provided with a ring of flange plate in the middle of the outer circumference, the axial distance between the outer section and the inner circumference of the outer ring is smaller than the diameter of the inner circumference of the inner section, a ring of cylindrical roller track is arranged in the middle of the outer section of the inner circumference of the outer ring, a cylindrical roller inner stop shoulder is arranged at the inner end of the cylindrical roller track, a cylindrical roller outer stop shoulder is arranged at the outer end of the cylindrical roller track, a ring of angular contact spherical rolling element track is arranged at the end of the inner circumference of the cylindrical roller inner stop shoulder, an outer half outer ring is coaxially arranged at the inner section of the inner circumference of the outer ring, the cylindrical roller track arranged at the inner circumference of the outer ring and the ring of cylindrical roller track arranged in the middle of the inner circumference of the outer half outer ring of the outer ring respectively correspond to the cylindrical roller tracks arranged at the two ends of the outer circumference of the variable diameter middle ring, and a ring of angular contact spherical The deep groove spherical rolling body tracks arranged in the middle of the outer circumference of the diameter middle ring correspond to each other and are combined through cylindrical rollers arranged in the cylindrical roller tracks at the two ends of the outer circumference of the diameter-variable middle ring and spherical rolling bodies arranged in the deep groove spherical rolling body tracks in the middle of the outer circumference of the diameter-variable middle ring respectively to form an outer layer bearing structure of the power bearing,

A car hub unit power bearing with a centrally-mounted ball comprises: the combined type reducing middle ring is formed by combining two double-half reducing middle rings through a balance sleeve seat arranged in the middle of the outer circumference and a balance sleeve in a coaxial interference manner to form a combined type reducing middle ring, two angular contact spherical rolling element tracks are respectively arranged at intervals at two ends of the outer circumference of the combined type reducing middle ring, spherical rolling elements are respectively arranged in the angular contact spherical rolling element tracks, two double-row angular contact spherical rolling element tracks are arranged in the middle of the inner circumference of the combined type reducing middle ring, the spherical rolling elements are respectively arranged in the double-row angular contact spherical rolling element tracks, the diameter of the combined type reducing middle ring inner circumference angular contact spherical rolling element track is larger than or equal to that of the reducing middle ring outer circumference angular contact spherical rolling element tracks, and the combined type reducing middle ring is symmetrically reduced between the inner layer spherical rolling elements and the outer layer spherical rolling elements The diameter of the inner layer of rolling body and the outer layer of rolling body is equal to the diameter of the inner layer of rolling body, and a tangential tension line is formed by a tangent line at the tangent point of the variable-diameter middle ring and the inner and outer layers of rolling bodies,

A car hub unit power bearing with a centrally-mounted ball comprises: the variable diameter middle ring is provided with a circle of crossed elliptical spherical roller track in the middle of the inner circumference, the curvature radius of the elliptical spherical roller track is larger than that of the roller circumferential track, the axial sections of the spherical roller inner track and the spherical roller outer track are in an elliptical structure, elliptical spherical rollers are arranged in the crossed elliptical spherical roller track, a circle of cylindrical roller track is arranged at the two ends of the crossed elliptical spherical roller track at intervals, cylindrical rollers are arranged in the cylindrical roller tracks, a circle of angular contact spherical roller track is arranged at the two ends of the outer circumference of the variable diameter middle ring at intervals, spherical rolling bodies are arranged in the two circles of angular contact spherical rolling body tracks, and the variable diameter middle ring is internally provided with a variable diameter inner ring and a variable diameter outer ring, The diameter of the track of the cross elliptical spherical roller at the inner circumference of the reducing middle ring is larger than or equal to the diameter of the track of the angular contact spherical roller at the outer circumference of the reducing middle ring, and a tangential tension line is formed by the tangential line at the tangential point of the reducing middle ring, the inner elliptical spherical roller and the outer spherical roller,

the inner half inner ring is provided with a circle of elliptic spherical roller track at the end head of the inner end of the outer circumference,

The invention relates to a car hub unit power bearing with a centrally-arranged ball, which has the beneficial effects that: the invention creates an important mechanical structure point of a middle ball between two sections of rollers by utilizing the principle of two-point contact pure rolling friction of the deep groove ball bearing, creates a mechanical structure taking the double-row deep groove ball bearing and the double-row angular contact ball bearing as the middle balls, combines the mechanical structure of the middle balls with the reducing middle ring to create the power bearing of the car hub unit with the middle ball, can effectively improve the high-speed stability of the bearing, and realizes high speed, heavy load, low friction and long service life.

Drawings

FIG. 1 is an axial cross-sectional view of a car hub unit power bearing with center balls arranged in deep groove ball rolling element tracks, with the distance between the inner and outer circumferences of a reducing middle ring.

FIG. 2 is an axial cross-sectional view of a car hub unit power bearing provided with a central ball, wherein a deep groove spherical rolling element track is arranged in the middle of the inner circumference of a reducing middle ring, and two ends of the outer circumference are respectively provided with an angular contact spherical rolling element track at intervals.

FIG. 3 is an axial cross-sectional view of a car hub unit power bearing provided with a central ball, wherein a deep groove spherical rolling element track is arranged in the middle of the outer circumference of a reducing middle ring, and two ends of the inner circumference are respectively provided with an angular contact spherical rolling element track at intervals.

FIG. 4 is an axial cross-sectional view of a power bearing of a car hub unit with center balls, in which a double-row angular contact spherical rolling element track is arranged in the middle of the inner circumference of a reducing middle ring, and two ends of the outer circumference are respectively provided with an angular contact spherical rolling element track at intervals.

FIG. 5 is an axial cross-sectional view of a power bearing of a car hub unit with center balls, in which a double-row angular contact spherical rolling element track is arranged in the middle of the outer circumference of a reducing middle ring, and two ends of the inner circumference are respectively provided with an angular contact spherical rolling element track at intervals.

FIG. 6 is an axial cross-sectional view of a car hub unit power bearing with center balls provided with a double-row angular contact spherical rolling element track arranged in the middle of the outer circumference of a combined type reducing middle ring.

FIG. 7 is an axial cross-sectional view of a power bearing of a car hub unit with a center ball at the middle of the outer circumference of a variable diameter center ring and tapered roller tracks at the two ends of the inner circumference.

FIG. 8 is an axial sectional view of a power bearing of a car hub unit with a central ball, in which a double-row angular contact spherical rolling element track is arranged in the middle of the inner circumference of a combined type reducing middle ring.

FIG. 9 is an axial cross-sectional view of a power bearing of a car hub unit with a centrally-located ball with crossed elliptical spherical roller tracks in the middle of the inner circumference of a variable-diameter center ring according to the present invention.

Fig. 10 is a schematic diagram of the mechanical structure of the power bearing of the car hub unit with the central ball and the symmetrical diameter change of the diameter-changing middle ring between the inner layer and the outer layer of rolling elements, so that the tangential tension relationship is formed by the tangential lines at the tangential points of the diameter-changing middle ring and the inner layer and the outer layer of rolling elements, in fig. 10: a is a variable-diameter middle ring, B is a central line of an axial section of the variable-diameter middle ring, C is an outer layer rolling body, C-1 is an inner layer rolling body, D is a tangent point of the inner layer rolling body and the variable-diameter middle ring, E is the outer end (wheel direction) of a hub shaft, E-1 is the outer section of the hub shaft, E-2 is the inner section of the hub shaft, E-3 is the inner end (engine direction) of the hub shaft, and F1 and F2 are tangential tension lines of the tangent point of the variable-diameter middle ring and the inner layer rolling body and the outer layer rolling body.

In the figure: 1. a hub shaft, 2, a flange plate, 3, a reducing middle ring, 4, an outer half outer ring, 5, an inner half inner ring, 6, an outer ring, 7, a double half outer ring, 8, an angular contact spherical rolling element track, 9, a double-row angular contact spherical rolling element track, 10, a deep groove spherical rolling element track, 11, a spherical rolling element, 12, a spherical rolling element outer shoulder, 13, a cylindrical roller track, 14, a cylindrical roller, 15, the device comprises a cylindrical roller inner retaining shoulder 16, a cylindrical roller outer retaining shoulder 17, a tapered roller track 18, a tapered roller 19, a tapered roller outer retaining shoulder 20, a tapered roller inner retaining shoulder 21, a double-half reducing middle ring 22, a balance sleeve 22-1, a balance sleeve seat 23, a combined reducing middle ring 24, an inner ferrule 25, a cross elliptic spherical roller track 25-1, an elliptic spherical roller track 26 and an elliptic spherical roller.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the present invention is not limited to the specific examples.

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Car hub unit power bearing provided with middle ball

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