KR20180023552A - Integral axle housing - Google Patents

Abstract

The present invention relates to a housing-integrated axle in which a hub housing coupled to a constant velocity joint is coupled to the inside of a knuckle to be able to rotate by a bearing preload portion. The hub housing comprises: a housing body penetrated; a constant velocity joint coupling portion formed on the inner circumferential portion of the housing body to have a ball guide groove; a bearing preload portion formed on the outer circumferential portion of the housing body; and a bearing outer ring pressure protrusion integrated with a tube fixing groove extending outward on the bearing preload portion and having the knuckle on both sides of the inner circumferential portion thereof. Therefore, by preventing backlash due to a coupling between a hub serration and a stem portion of a constant velocity joint, it is possible to achieve a quicker response through performance improvement of the axle. Therefore, noise and vibration are reduced, and driving and handling of a vehicle are improved.

Description

[0001] INTEGRAL AXLE HOUSING [0002]

The present invention relates to a housing integrated type axle, in particular, a hub housing coupled to a constant velocity joint into a knuckle is coupled by a bearing preload portion so that a driving force of a constant velocity joint is directly transmitted to a wheel side.

Generally, a hub and a bearing are installed on a tire wheel connected to a drive axle to withstand the load of the vehicle in the vertical direction, the longitudinal direction and the horizontal load when the vehicle turns.

The constant velocity joint is installed on the driving axle of the vehicle and is transmitted from the transmission, and is used to transmit the power to the wheels. Hub and bearing of constant velocity joint are assembled and used as one unit.

Fig. 7 is an exemplary view showing an axle having a constant velocity joint according to the prior art.

A constant velocity joint, which is coupled to one side of the drive shaft 600 to transmit the power received from the transmission to the drive shaft 600, is inserted into the constant velocity joint housing 610.

The stem portion 620 exposed to the constant velocity joint housing 610 passes through the hub 620 formed in the knuckle (carrier) 640 and the hub serration portion 651 in the state where the anti-noise washer 630 is fitted, Is exposed.

A bearing 671 having a hub and bearing assembly coupling portion 670 is coupled to the outer periphery of the hub 650 while the lock nut 660 is coupled to the exposed stem portion 620, The hub 640 is coupled to the knuckle 640 by bolts 680.

This axle allows the hub and bearing assembly coupling portion 670 to be coupled to the knuckle 640 by the coupling bolt 680 and the hub serration portion 651 of the hub 650 and the stem portion 620 of the constant velocity joint, Lt; / RTI > At this time, the joint preventing washer 630 is inserted between the hub 650 and the constant velocity joint having the hub serration portion 651 of the constant velocity joint to prevent the joint, and the lock nut 660 is fastened to the hub 650 As the constant velocity joint is coupled, the driving force of the constant velocity joint is transmitted to the wheel side through the hub & bearing assembly. At this time, the hub and bearing assembly inserts the bearing 671 into the hub 650 having the spherical inner shape of one side of the two row bearing, then assemble the hub 650 and the bearing ball to the inner side spherical surface of the other side, ) Is formed and the preload amount of the bearing is adjusted and fixed.

However, since the constant velocity joint and the hub connection are made up of the hub serration part, there is a problem that the response is lowered due to the occurrence of the backlash.

Also, since the joint preventing washer is fitted between the constant velocity joint and the hub, the occurrence of slip joint is prevented, but the joint preventive washer for preventing slip joint is inserted, thereby increasing the weight and increasing the cost due to an increase in the number of parts .

The weight increase of the hub joint for mounting the constant velocity joint stem portion and the constant velocity joint, and the manufacturing cost for processing, forging, and heat treatment for forming each shape are increased.

Patent Document 1: Japanese Patent Application Laid-Open No. 10-2010-0054615 (May 25, 2010)

The present invention can improve the performance of the axle so as to prevent the backlash caused by the stem portion and the hub serration engagement of the conventional constant velocity joint to obtain quick response and to prevent slippage between the hub and the constant velocity joint (Noise and vibration) can be reduced, and the weight of the vehicle can be further reduced by integrating the hub and the constant velocity joint housing. In addition, the vehicle's R & (Traveling and handling) can be improved.

The present invention relates to a housing integrated axle, in which a hub housing coupled to a constant velocity joint into a knuckle is rotatably coupled by a bearing preload portion, the hub housing including a housing body penetrating therethrough; A constant velocity joint coupling portion formed to have a ball guide groove on an inner periphery of the housing body; A bearing preload pressing portion formed on the outer circumferential edge of the housing body; And a tube fixing groove extending outwardly from the bearing pre-pressurizing portion are integrally formed, and the knuckle comprises a bearing outer ring pressing jaw formed on both sides of the inner peripheral portion.

The bearing preload guide portion may include an outer bearing inner ring support jaw formed on one side of the outer periphery of the housing body; An outer bearing inner ring slide supporting portion formed on the other side of the outer periphery of the housing body; A groove portion formed between the outer bearing inner ring support jaw and the outer bearing inner ring slide support portion; And a lock male screw portion formed on an outer circumferential edge of the housing body located outside the outer bearing inner ring slide support portion.

The bearing preload part is inserted into one side of the outer circumferential edge of the housing body and the inner circumferential part of the knuckle and includes an outer bearing having an outer ball and an outer bearing, An inner bearing portion which is inserted into the other side of the outer periphery of the housing body and the other side of the inner periphery of the knuckle, the inner bearing portion including an inner inner ring having an inner ball and an inner outer ring; An elastic ring having both ends abutted between the inner and outer rings of the lettuce; And a lock nut which is in close contact with an outer side of the inner inner ring and screwed to a lock male screw portion formed on the housing body.

","

"형태를 가지며, 상기 아웃터 외륜과 인너 외륜은 "

","

"형태를 갖도록 형성되고, 상기 탄성링은 중간에 보강 라이너가 형성됨을 특징으로 한다.In addition, the outer and inner inner rings are "

","

Quot; shape, and the outer outer ring and the inner outer ring are "

","

Quot; shape, and the elastic ring is characterized in that a reinforcing liner is formed in the middle.

Further, the lock nut is coupled with a lock ring fixed to the hub housing by a lock ring bolt, wherein the lock ring has a plurality of slot holes formed at a predetermined interval in the ring body, and a locking ring projection is formed in the inner peripheral portion of the ring body And the lock ring protrusion is engaged with the hub key groove formed in the hub housing.

In addition, the hub key grooves are formed to have three places of 120 ° apart from 0 °, 3 places of 120 ° apart from the base of 42 °, and 3 places of 120 ° apart from each other of 84 °, and three lock ring protrusions are formed at intervals of 120 ° .

In addition, the slot holes are spaced at a distance of 11.25 占 from the first locking ring projection, and the center of one side of the other slot hole is located at regular intervals.

Further, the lock nut is formed with a lock female threaded portion by tapping at a position having the same radius as the slot hole, so that the lock ring bolt is fastened.

In the present invention, since the hub housing coupled to the constant velocity joint is coupled to the inside of the knuckle by the bearing preload, backlash due to the stem portion and hub serration engagement of the conventional constant velocity joint can be prevented .

In addition, through this, the performance of the axle can be improved to obtain a quicker response.

In addition, since the occurrence of slim joints between the hub and the constant velocity joint is originally eliminated, an effect of reducing noise and vibration can be obtained.

Further, the weight can be further reduced by integrating the hub and the constant velocity joint housing.

In this way, it is possible to obtain an effect of improving driving and handling of the vehicle through reduction of unsprung masses from the overall viewpoint of the vehicle.

Brief Description of the Drawings Fig. 1 is a perspective view showing an interior and exterior of a housing integrated type axle according to the present invention. Fig.
2 is a perspective view showing a lock nut and a lock ring separated from each other in a housing integrated type axle according to the present invention;
Fig. 3 is an enlarged view of a bearing preload portion in a housing integrated type axle according to the present invention; Fig.
4 is an exemplary view showing a combined state of the hub housing by the lock ring and the locking bolt in the housing integrated type axle according to the present invention.
Fig. 5 is a perspective view and a plan view showing a lock ring arrangement state of a lock ring in a housing integrated type axle according to the present invention; Fig.
6 is an exemplary view showing an optimal dimensional state of a bearing ball and a CVJ ball in a housing integrated type axle according to the present invention.
Fig. 7 is a view showing an example of separating an axle having a constant velocity joint according to the prior art; Fig.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a perspective view showing a lock nut and a lock ring separated from each other in a housing-integrated type axle according to the present invention, and FIG. 3 is a perspective view showing the lock- 4 is a view illustrating an assembled state of the hub housing by the lock ring and the locking bolt in the housing integrated type axle according to the present invention .

The housing integrated type axle according to the present invention is designed to maximize the R & H (running and handling) while minimizing the NVH (Noise, Vibration and Harshness noise and vibration) The hub housing 300 coupled to the constant velocity joint 200 into the knuckle 100 is provided with the constant velocity joint 200, the hub housing 300 and the bearing preload portion 400, and the bearing preload portion 400 To be rotatable.

The knuckle 100 has bearing outer ring pressing protrusions 110 formed on both sides of the inner circumferential portion so that the outer outer ring 413 of the outer bearing portion 410 and the inner outer ring 423 of the inner bearing portion 420, So that it can be stably supported.

The lower housing 300 is integrally formed with the housing body 310, the constant velocity joint attaching portion 320, the bearing preload pressing portion 330, and the tube fixing groove 340, And the constant velocity joint joining part 320 is formed to have a ball guide groove 321 on the inner periphery of the housing body 310 so that the ball of the constant velocity joint can be stably coupled .

The bearing preload portion 330 may be formed on the outer circumferential edge of the housing body 310 and may be subjected to a certain preliminary pressure to the outer bearing portion 410 and the inner bearing portion 420 by an axially biasing force .

The tube fixing groove 340 is provided with a constant-speed joint boot BT to be stably fixed by a band BN.

The bearing preload guide portion 330 has an outer bearing inner ring support protrusion 331 formed at one side of the outer circumference of the housing body 310 and an inner bearing inner slide support portion 332 at the other side of the outer circumference of the housing body 310, .

A recessed portion 333 is formed between the outer bearing inner ring supporting jaw 331 and the inner bearing inner wheel slide supporting portion 332. The inner bearing inner ring slide supporting portion 332 of the inner bearing inner ring slide supporting portion 332, A lock male screw portion 334 is formed on the outer circumferential edge portion so that the lock nut 440 is screwed so that a bearing preload can be applied in the axial direction.

The bearing preload part 400 is provided with an outer bearing part 410, an inner bearing part 420, an elastic ring 430 and a lock nut 440. The outer bearing part 410 includes a housing body 310 And an outer outer ring 413 having an outer ball 411 inserted into one side of the inner periphery of the knuckle 100. [

The inner bearing part 420 is provided to face the outer bearing part 410 and is inserted into the other side of the outer peripheral edge of the housing body 310 and the other side of the inner peripheral part of the knuckle 100.

The inner bearing portion 420 is provided with an inner inner ring 422 having an inner ball 421 and an inner outer ring 423 and the elastic ring 430 is fixed to the inner bearing portion 420 So that both ends of the outer bearing 412 and the inner inner ring 422 are in contact with each other so that the axial load can be applied to the outer bearing portion 420 in the same manner.

" "

"형태를 갖도록 하여 아웃터 내륜(412)이 축방향으로 밀리는 것을 방지하는 가운데 인너 내륜(422)은 축방향으로 슬라이드 이동 가능하게 결합되어 있고, 상기 인너 내륜(422)이 축방향으로 이동 되는 이동량에 따라 예압력이 작용될 수 있게 구비된다.The lock nut 440 is tightly attached to the outer bearing portion 410 and the inner bearing portion 420 so that tightening force is screwed to the lock male screw portion 334 to the outside of the inner inner ring 422, And is screwed to a lock male screw portion 334 formed on the housing body 310. [ At this time, the outer and inner inner rings 412,

""

The inner inner ring 422 is axially slidably engaged with the inner inner ring 422 while preventing the outer inner ring 412 from being pushed in the axial direction, So that a preliminary pressure can be applied.

" "

"형태를 갖도록 형성되어 아웃터 볼(411)과 인너 볼(421)에 의하여 밀착된 상태가 유지될 수 있도록 하고, 상기 탄성링(430)은 중간에 보강 라이너(431)가 형성되어 평판띠의 형태를 갖는 탄성링(430)이 부분적으로 틀어지는 것을 방지하는 가운데 일정한 한도 내에서 항상 탄성력이 양측으로 작용될 수 있게 구비된다.For this purpose, the outer outer ring 413 and the inner outer ring 423 are "

""

The reinforcing liner 431 is formed in the middle of the elastic ring 430 so as to be in the form of a flat strip The elastic ring 430 is prevented from being partially disengaged, and the elastic force is always applied to both sides within a certain limit.

The lock nut 440 is provided to prevent the lock nut 440 from being unwound in the reverse direction as the lock ring 460 is fixed to the hub housing 300 by the lock ring bolt 450, A plurality of slot holes 462 are formed in the ring body 461 at regular intervals and a locking ring projection 463 is formed in the inner peripheral portion of the ring body 461.

The lock ring protrusion 463 is fitted to the hub key groove 311 formed in the hub housing 330 so as to prevent the lock ring 460 from being unwound in the reverse direction during the driving process.

As shown in FIG. 5, the hub key grooves 311 are formed at three positions of 120 ° apart from 0 °, 3 places of 120 ° intervals of 42 °, and 3 places of 120 ° apart from each other by 84 ° , And it is preferable that the lock ring protrusions 463 are formed at three positions in intervals of 120 degrees. 4, the center of one slot of another slot hole 462 is located at an interval of 11.25 DEG from the first lock ring projection 463, Do.

This is the case when the method (direction) in which the lock ring protrusion 463 formed in the lock ring 460 is engaged with the hub key groove 311 is three positions with respect to the hub key groove 311 at intervals of 120 degrees with respect to 0 degrees, In the case of three places of intervals and three places of 120 degrees apart on 84 degrees, there are three kinds of joining directions in total of one joining direction, and when such a locking ring 460 is used upside down, As shown in the figure, it is possible to easily engage with three coupling directions having a total of six coupling directions.

The lock nut 440 is formed in a state where the lock nut 440 is tightened as the lock ring bolt 450 is fastened by forming the lock female screw portion 441 through tapping at a position having the same radius as the slot hole 462 It is possible to further prevent unwinding in the reverse direction.

The lock nut 440 is screwed to the hub housing 300 and then fixed to the hub housing 300 by the lock ring 460 in the direction of the lock ring 460 (the key groove 311 of the hub housing 300) The slotted hole 462 of the lock ring 460 and the screw tab of the lock nut 440 can always be matched irrespective of the direction of assembling the locking ring projection 463 matched with the lock ring 460. At this time, It is possible to prevent the bearing preload amount by the locknut 440 from being changed in the course of aligning the screw tab and the slot hole 462 by partially rotating the locknut 440.

FIG. 6 is an exemplary view showing an optimum dimensional state of a bearing ball and a CVJ ball in a housing integrated type axle according to the present invention.

In the housing integrated type axle according to the present invention, the optimum condition of the bearing housing for the bearing ball and the CVJ ball is such that 2.5? A? B? 3.7 as shown in FIG.

Here, A: bearing inner diameter and B: CVJ ball PCD have 2.5 ≤ bearing ball PCD ÷ ball distance (inner ball ↔ outer ball) ≤ 3.7.

Further, 1.4? C? D? 1.8.

Where C is the bearing inner diameter and D is the CVJ ball PCD and 1.4 ≤ bearing inner diameter ÷ CVJ ball PCD ≤ 1.8.

Further, 2.6? E? F? 3.0.

E: Distance from the hub flange surface to the outer surface of the inner bearing, F: Distance from the outer surface of the inner bearing to the hub end (CVJ side) 2.6 ≤ Distance from the hub flange surface to the outer surface of the inner bearing ÷ Inner bearing And a distance? 3.0 from the outer surface to the hub end (CVJ side). That is, according to the optimal conditions of the bearing housing for the bearing balls and the CVJ balls, the maximum amount of material is minimized while the maximum rigidity is obtained, and the efficiency of the driving force can be obtained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments and the drawings, Modification is possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Knuckles
200: constant velocity joint
300: Hub housing
310: housing body
320: Constant velocity joint portion
330: Bearing preload pressure part
340: tube fixing groove
400: Bearing preload
410: Outer bearing part
420: Inner bearing portion
430: elastic ring
440: Lock nut

Claims (12)

A housing integrated type axle in which a hub housing coupled to a constant velocity joint into a knuckle is rotatably coupled by a bearing preload portion,
The hub housing includes a penetrating housing body;
A constant velocity joint coupling portion formed to have a ball guide groove on an inner periphery of the housing body;
A bearing preload pressing portion formed on the outer circumferential edge of the housing body; And
Wherein the bearing pre-pressurizing portion is integrally formed with a tube fixing groove extending outwardly,
Wherein the knuckle comprises a bearing outer ring pressing jaw formed on both sides of the inner periphery.
The method according to claim 1,
The bearing preload guide portion includes an outer bearing inner ring support jaw formed on one side of the outer periphery of the housing body;
An inner bearing inner ring slide supporting portion formed on the other side of the outer periphery of the housing body;
A recessed portion formed between the outer bearing inner ring support jaw and the inner bearing inner ring slide support portion; And
And a lock male screw portion formed on the outer circumferential edge of the housing body located outside the inner wheel slide supporting portion of the inner bearing.
The method according to claim 1,
The bearing preload part is inserted into one side of the outer circumferential edge of the housing body and the inner circumferential part of the knuckle and has an outer bearing having an outer ball and an outer bearing;
An inner bearing portion which is inserted into the other side of the outer periphery of the housing body and the other side of the inner periphery of the knuckle, the inner bearing portion including an inner inner ring having an inner ball and an inner outer ring;
An elastic ring having both ends abutted between the inner and outer rings of the lettuce; And
And a lock nut which is in close contact with an outer side of the inner inner ring and is screwed to a lock male screw portion formed on the housing body.
The method of claim 3,
The outer and inner inner rings are "

","

Quot; shape, and the outer outer ring and the inner outer ring are "

","

Wherein the elastic ring is formed with a reinforcing liner in the middle thereof.
The method of claim 3,
Wherein the lock nut is coupled with a lock ring fixed to the hub housing by a lock ring bolt, wherein the lock ring is formed with a plurality of slot holes having a predetermined interval in the ring body, a locking ring protrusion is formed on the inner peripheral portion of the ring body, Wherein the lock ring protrusion is engaged with a hub key groove formed in the hub housing.
6. The method of claim 5,
The hub key grooves are formed to have three places of 120 ° apart from 0 °, 3 places of 120 ° apart from each other by 42 °, and 3 places of 120 ° apart from each other by 84 °, and three locking ring protrusions are formed at intervals of 120 ° Housing integrated axle.
6. The method of claim 5,
Wherein the slot hole is disposed at a distance of 11.25 占 from the first locking ring projection, with one center of one of the slot holes being located at equal intervals.
6. The method of claim 5,
Wherein the lock nut is formed with a lock female threaded portion by tapping at a position having the same radius as the slot hole, so that the lock ring bolt is fastened.
The method according to claim 1,
2.5 ≤ Bearing ball PCD ÷ Integral housing axle with interpole distance (Inner ball ↔ Outer ball) ≤ 3.7.
The method according to claim 1,
1.4 ≤ bearing inside diameter ÷ CVJ ball PCD ≤ 1.8, housing integrated axle.
The method according to claim 1,
2.6 ≤ Distance from the hub flange to the outer surface of the inner bearing ÷ Distance from the outer surface of the inner bearing to the hub end (CVJ side) ≤ 3.0.
The method according to claim 1,
2.5 ≤ Bearing ball PCD ÷ Ball distance (Inner ball ↔ Outer ball) ≤ 3.7, 1.4 ≤ Bearing bore ÷ CVJ Ball PCD ≤ 1.8, and 2.6 ≤ Distance from the hub flange surface to outer bearing side of the inner bearing ÷ Hub And the distance to the end (CVJ side) ≤ 3.0.

Images