阅读说明：本技术 一种一体密封式汽车轮毂单元 (Integrated sealed automobile hub unit ) 是由 钱新杰 孙力行 邹凌飞 于 2021-08-03 设计创作，主要内容包括：本发明提供了一种一体密封式汽车轮毂单元,包括芯轴,芯轴外周套接外圈,芯轴与外圈之间形成转动环隙,转动环隙内固设保持架,保持架上呈转动设置若干滚珠,转动环隙的前端环形口内固设密封件,密封件的内周抵靠在芯轴的周壁上,密封件的外周抵靠在外圈的内壁上,转动环隙的后端环形口中由内至外依次固设反压盖、磁性圈,芯轴与外圈的后端上扣接密封压盖,密封压盖具有盖顶,盖顶的周圈固连环形密封折边,环形密封折边插入转动环隙中,使环形密封折边的外壁与外圈的内壁密贴形成过盈配合,盖顶的外壁上设置盲孔,盲孔内固装传感器。本一体密封式汽车轮毂单元通过整体性密封,减少密封部件,优化密封效果,实现节能化低扭矩高集成。(The invention provides an integrated sealed automobile hub unit, which comprises a mandrel, wherein an outer ring is sleeved on the periphery of the mandrel, a rotating annular gap is formed between the mandrel and the outer ring, a retainer is fixedly arranged in the rotating annular gap, a plurality of balls are rotatably arranged on the retainer, a sealing element is fixedly arranged in an annular opening at the front end of the rotating annular gap, the inner periphery of the sealing element is abutted against the peripheral wall of the mandrel, the outer periphery of the sealing element is abutted against the inner wall of the outer ring, a reverse pressing cover and a magnetic ring are fixedly arranged in an annular opening at the rear end of the rotating annular gap from inside to outside in sequence, the mandrel and the rear end of the outer ring are buckled with a sealing pressing cover, the sealing pressing cover is provided with a cover top, the peripheral ring of the cover top is fixedly connected with an annular sealing folded edge, the annular sealing folded edge is inserted into the rotating annular gap, the outer wall of the annular sealing folded edge is tightly attached to form interference fit with the inner wall of the outer ring, a blind hole is arranged on the outer wall of the cover top, and a sensor is fixedly arranged in the blind hole. This integrative sealed automobile wheel hub unit reduces sealed part through the wholeness is sealed, optimizes sealed effect, realizes the high integration of energy-conservation low moment of torsion.)

1. An integrated sealed automobile hub unit comprises a mandrel, an outer ring is sleeved on the periphery of the mandrel, a rotating annular gap is formed between the mandrel and the outer ring, a retainer is fixedly arranged in the rotating annular gap, a plurality of balls are rotatably arranged on the retainer, the integrated sealed automobile hub unit is characterized in that a sealing element is fixedly arranged in an annular opening at the front end of the rotating annular gap, the inner periphery of the sealing element is abutted against the peripheral wall of the mandrel, the outer periphery of the sealing element is abutted against the inner wall of the outer ring, a counter pressure cover and a magnetic ring are sequentially and fixedly arranged in an annular opening at the rear end of the rotating annular gap from inside to outside, the mandrel and the rear end of the outer ring are fastened with a sealing gland, the sealing gland is provided with a cover top, the peripheral ring of the cover top is fixedly connected with an annular sealing folded edge, the annular sealing folded edge is inserted into the rotating annular gap, so that the outer wall of the annular sealing folded edge is tightly attached to the inner wall of the outer ring to form interference fit, the outer wall of the cover top is provided with a blind hole, and a sensor is fixedly installed in the blind hole.

2. The integrated sealed automobile hub unit according to claim 1, wherein an annular protrusion is protruded from an outer wall of the annular sealing flange, and the annular protrusion presses against a rear port edge of the outer ring to form a seal.

3. The integrally sealed automobile hub unit of claim 1, wherein the rear end annular mouth of said rotating annular gap and the rear end of said mandrel are both located in the integral sealing cavity of said gland.

4. The integrally sealed automobile hub unit according to claim 1, wherein an inner ring is fixedly sleeved on the rear section outer periphery of the mandrel, the back pressure cover is sleeved on the outer periphery of the inner ring and abuts against the inner wall of the outer ring, and the back pressure cover is buckled on the annular end face of the rotating annular space.

5. The one-piece sealed automobile hub unit according to claim 4, wherein the magnetic ring is press-fitted over a rear end of the inner ring.

6. The integrally sealed automobile hub unit according to claim 4, wherein said inner race has an array of inner channels on its outer circumference, said balls being embedded in said inner channels.

7. The hub unit according to claim 6, wherein the outer ring has two rows of outer channels on its inner circumference, one of the outer channels being in alignment with the inner channel, the outer channel having a hardened surface, the balls being embedded in the outer channel.

8. The integrally sealed automobile hub unit according to claim 1, wherein the sensor is any one of an intelligent sensor, a hall sensor and an electromagnetic sensor.

9. The integrally sealed automobile hub unit according to claim 1, wherein the mandrel has a hollow through cavity, and a positive pressure cover is fixedly arranged in the hollow through cavity.

10. The integrated sealed automobile hub unit according to claim 1, wherein a flange is fixedly connected to the front end face of the mandrel, a plurality of screw holes are formed in the flange, and bolts penetrate through the screw holes to form interference fit.

Technical Field

The invention belongs to the technical field of automobile accessories, and relates to a hub structure, in particular to an integrated sealed automobile hub unit.

Background

The automobile hub unit is used for bearing and providing accurate guide for rotation of a hub, bears axial load and radial load, and is one of very critical parts in an automobile. With the emphasis on safe driving of automobiles, various manufacturers and users have made higher demands on quality.

The wheel hub unit belongs to an automobile chassis part, reduces unsprung mass, is a difficult point in automobile engineering, reduces the weight of the wheel hub unit, increases the ratio of sprung weight to unsprung weight, and can improve the controllability, the acceleration and the comfort of a vehicle. In recent years, the automobile industry in China is developed at a high speed, the pollution emission standard of the motor vehicles in China is gradually improved, the automobile industry in China must meet a new environmental standard and meet strict emission regulation indexes, and the technical upgrading of the automobile industry is imperative.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides an integrated sealed automobile hub unit which is integrally sealed, reduces sealing parts, optimizes the sealing effect, and realizes energy conservation, low torque and high integration.

The purpose of the invention can be realized by the following technical scheme: an integrated sealed automobile hub unit comprises a mandrel, an outer ring is sleeved on the periphery of the mandrel, a rotating annular gap is formed between the mandrel and the outer ring, a retainer is fixedly arranged in the rotating annular gap, a plurality of balls are rotatably arranged on the retainer, a sealing element is fixedly arranged in an annular opening at the front end of the rotating annular gap, the inner periphery of the sealing element is abutted against the peripheral wall of the mandrel, the outer periphery of the sealing element is abutted against the inner wall of the outer ring, a back-pressure cover and a magnetic ring are sequentially and fixedly arranged in an annular opening at the rear end of the rotating annular gap from inside to outside, a sealing gland is fastened on the rear end of the mandrel and the outer ring and provided with a cover top, the peripheral ring of the cover top is fixedly connected with an annular sealing folded edge, and the annular sealing folded edge is inserted into the rotating annular gap to enable the outer wall of the annular sealing folded edge to be closely attached to the inner wall of the outer ring to form interference fit, the outer wall of the cover top is provided with a blind hole, and a sensor is fixedly installed in the blind hole.

In the integrated sealed automobile hub unit, the front end of the rotating annular gap is sealed only through one sealing element, the roughness of the contact surface of the sealing element and the mandrel is improved, and the friction torque is reduced. The rear end of the rotary annular gap is buckled by the whole sealing gland, and the outer ring and the mandrel are covered to form a whole sealing state. And the combination arrangement of a plurality of sealing components is further saved, so that the friction loss when the hub bearing unit rotates is reduced, and the starting torque is reduced.

In the integrated sealed automobile hub unit, the outer wall of the annular sealing folded edge is convexly provided with the annular bulge, and the annular bulge is pressed on the rear end opening edge of the outer ring to form sealing.

In the integrated sealed automobile hub unit, the rear end annular opening of the rotating annular gap and the rear end of the mandrel are both located in the integrated sealing inner cavity of the sealing gland.

In the integrated sealed automobile hub unit, the rear section of the mandrel is fixedly sleeved with the inner ring, the back pressure cover is sleeved on the periphery of the inner ring and abuts against the inner wall of the outer ring, and the back pressure cover is buckled on the annular end face of the rotating annular gap.

In the integrated sealed automobile hub unit, the magnetic ring is pressed on the rear end of the inner ring.

In the above-described integrated seal type automobile hub unit, the outer circumference of the inner race has an array of inner channels, and the balls are embedded in the inner channels.

In the integrated sealed automobile hub unit, the inner circumference of the outer ring is provided with two rows of outer channels, one outer channel is in contraposition fit with the inner channel, the outer channel is provided with a quenching surface, and balls are embedded into the outer channels.

In the integrated sealed automobile hub unit, the sensor is specifically any one of an intelligent sensor, a hall sensor and an electromagnetic sensor.

In the integrated sealed automobile hub unit, the mandrel is provided with a hollow through cavity, and a positive pressure cover is fixedly arranged in the hollow through cavity.

In the integrated sealed automobile hub unit, the front end surface of the mandrel is fixedly connected with a flange, the flange is provided with a plurality of screw holes, and bolts penetrate through the screw holes to form interference fit.

Compared with the prior art, the integrated sealed automobile hub unit has the following advantages:

1. the whole hub bearing unit only uses one sealing element, so that the friction loss of the hub bearing unit during rotation is reduced, the starting torque is reduced, the starting friction torque is reduced, namely, the energy loss of the hub bearing in the rotation process is reduced, the oil consumption is reduced, and the energy conservation and emission reduction are realized.

2. Firstly, the hollow part of the mandrel is sealed by adopting a gland in an interference way, and forms an integral sealing space with the sealing gland and the sealing element. Secondly, utilize the characteristics of magnetic induction, the hole that the gland cooperates the sensor is the blind hole, neither influences the signal of sensor, has solved the gland again and has sealed the problem. And thirdly, the blind holes of the sealing gland can be adapted to different types of sensors, so that the novel and old vehicle types are considered, and the application range is widened.

3. Through the improvement to hub unit part dabber structure, reduce raw and other materials, reduce the volume and the weight of hub unit, reduce the consumption of raw and other materials, reduce the production manufacturing cost of hub unit. The unsprung weight of the automobile is reduced, and the controllability, the acceleration and the comfort of the automobile are improved.

Drawings

Fig. 1 is a schematic sectional structure view of the integrated sealed automobile hub unit.

In the figure, 1, a mandrel; 2. an inner ring; 3. a holder; 4. a ball bearing; 5. a seal member; 6. a reverse gland; 7. a magnetic ring; 8. an outer ring; 9. a sealing gland; 9a, annularly sealing and folding edges; 9b, an annular bulge; 10. a sensor; 11. a positive pressure cover; 12. and (4) bolts.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in figure 1, the sealed automobile hub unit comprises a mandrel 1, an outer ring 8 is sleeved on the outer periphery of the mandrel 1, a rotating annular gap is formed between the mandrel 1 and the outer ring 8, a retainer 3 is fixedly arranged in the rotating annular gap, a plurality of balls 4 are rotatably arranged on the retainer 3, a sealing element 5 is fixedly arranged in an annular opening at the front end of the rotating annular gap, the inner periphery of the sealing element 5 is abutted against the peripheral wall of the mandrel 1, the outer periphery of the sealing element 5 is abutted against the inner wall of the outer ring 8, a back pressure cover 6 and a magnetic ring 7 are sequentially and fixedly arranged in an annular opening at the rear end of the rotating annular gap from inside to outside, a sealing gland 9 is buckled on the rear ends of the mandrel 1 and the outer ring 8, the sealing gland 9 is provided with a cover top, the peripheral ring of the cover top is fixedly connected with an annular sealing folded edge 9a, the annular sealing folded edge 9a is inserted into the rotating annular gap, so that the outer wall of the annular sealing folded edge 9a tight fit with the inner wall of the outer ring 8 is formed, and a blind hole is arranged on the outer wall of the cover top, the sensor 10 is fixedly arranged in the blind hole.

In this integrative sealed automobile wheel hub unit, the front end of rotating the annular space realizes sealed through a sealing member 5 only to improve sealing member 5 and dabber 1 contact surface roughness, reduce friction torque. The rear end of the rotary annular gap is buckled by the whole sealing gland 9, and the outer ring 8 and the mandrel 1 are covered to form an integral sealing state. And the combination arrangement of a plurality of sealing components is further saved, so that the friction loss when the hub bearing unit rotates is reduced, and the starting torque is reduced. The inside of the hub unit forms a double-row angular contact bearing structure, so that the hub unit can bear axial load and radial load. The head of the mandrel 1 is riveted after assembly, so that the clearance of the hub unit is ensured within a reasonable range, and the operation of clearance matching during bearing assembly is omitted. The sensor 10 is mounted with blind holes to receive and convert the magnetic signal of the magnetic ring 7.

An annular bulge 9b is convexly arranged on the outer wall of the annular sealing folding edge 9a, and the annular bulge 9b is pressed on the rear end opening edge of the outer ring 8 to form sealing. The annular bulge 9b is utilized to realize the positioning function of the inserting depth, and the sealing effect is further optimized by abutting and pressing the edge of the outer ring 8.

The rear end annular opening of the rotary annular gap and the rear end of the mandrel 1 are both positioned in the integral sealing inner cavity of the sealing gland 9.

The inner ring 2 is fixedly sleeved on the periphery of the rear section of the mandrel 1, the back pressure cover 6 is sleeved on the periphery of the inner ring 2 and abuts against the inner wall of the outer ring 8, and the back pressure cover 6 is buckled on the annular end face of the rotary annular gap. The grease is prevented from flowing outward by the counter pressure cover 6, and the grease is held around the balls 4.

The magnetic ring 7 is press-fitted on the rear end of the inner ring 2. The magnetic ring 7 has a regular magnetic level and provides a signal to the sensor 10.

The inner race 2 has an array of inner channels on its outer circumference into which the balls 4 are inserted. The inner channel is used to support the rotation of the ball 4.

The inner circumference of the outer ring 8 is provided with two rows of outer channels, one outer channel is in contraposition fit with the inner channel, the outer channel is provided with a quenching surface, and the balls 4 are embedded into the outer channels. The outer channel is used to support the rotation of the ball 4. The outer channel adopts a local surface quenching mode, so that the hardness of the outer channel is improved, and the wear resistance of the outer channel is improved.

The sensor 10 is specifically any one of an intelligent sensor 10, a hall sensor 10, and an electromagnetic sensor 10.

The mandrel 1 is provided with a hollow through cavity, and a positive pressure cover 11 is fixedly arranged in the hollow through cavity. The middle of the mandrel 1 is hollow so as to reduce the weight of the whole hub bearing unit, and the hollow through cavity is matched with the positive pressure cover 11 to realize isolation and sealing so as to avoid mud water on the outer side from entering. The sealing gland 9, the positive pressure cover 11 and the sealing piece 5 form a sealing space inside the hub unit to prevent the leakage of grease and the entry of external impurities.

The front end face of the mandrel 1 is fixedly connected with a flange, the flange is provided with a plurality of screw holes, and bolts 12 penetrate through the screw holes to form interference fit. The hub unit is secured to the vehicle chassis by a plurality of bolts 12.

When the integrated sealed automobile hub unit rotates, the sealing element 5, the outer ring 8, the sealing gland 9 and the sensor 10 can be regarded as a fixedly connected whole and rotate relatively with the whole formed by combining the mandrel 1, the magnetic ring 7, the inner ring 2 and the back pressure cover 6.

Compared with the prior art, the integrated sealed automobile hub unit has the following advantages:

1. the whole hub bearing unit only uses one sealing element 5, so that the friction loss of the hub bearing unit during rotation is reduced, the starting torque is reduced, the starting friction torque is reduced, namely, the energy loss of the hub bearing during rotation is reduced, the oil consumption is reduced, and the energy conservation and emission reduction are realized.

2. Firstly, the hollow part of the mandrel 1 is sealed by adopting a gland interference, and forms an integral sealing space with the sealing gland 9 and the sealing element 5. Secondly, utilize the characteristics of magnetic induction, the hole that the gland cooperates sensor 10 is the blind hole, neither influences the signal of sensor 10, has solved the gland again and has sealed the problem. And thirdly, the blind holes of the sealing gland 9 can be adapted to different types of sensors 10, so that the novel and old vehicle types are considered, and the application range is widened.

3. Through the improvement to hub unit part dabber 1 structure, reduce raw and other materials, reduce the volume and the weight of hub unit, reduce the consumption of raw and other materials, reduce the production manufacturing cost of hub unit. The unsprung weight of the automobile is reduced, and the controllability, the acceleration and the comfort of the automobile are improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the mandrel 1 is used more herein; an inner ring 2; a holder 3; a ball 4; a seal 5; a back pressure cover 6; a magnetic ring 7; an outer ring 8; a sealing gland 9; an annular sealing flange 9 a; an annular projection 9 b; a sensor 10; a positive pressure cover 11; bolt 12, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.