JP2005335585A - Axle module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an axle module improving assembly workability on a vehicle and stabilizing quality. <P>SOLUTION: The axle module is composed of a wheel bearing equipped with a vehicle mounting flange 7b fixed to a knuckle N1 and a hub wheel 1 integrally having a wheel mounting flange 4, a constant velocity universal joint 3, a drive shaft D/S connected to this one end, and a constant velocity universal joint 22 which is connected to the other end, having a plurality of mounting flanges 28 radially extended to an outer periphery, and fixed to a differential through these mounting flanges 28. The axle module is composed of an inner cylindrical part where an inner peripheral surface 30 having a shape along the outer hull of an outside joint member 23 is formed, and the inner peripheral surface 30 is formed with a larger diameter than the maximum outside diameters Db, Dc of the constant velocity universal joints 3, 22, and a notch part which has a shape along the outer hull of the mounting flange 28 and is formed with a larger diameter than the circumscribed circle diameter D2 of the mounting flange 28. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, a pair of constant velocity universal joints, a drive shaft connected to these constant velocity universal joints, and a fixed type constant velocity universal joint and a wheel bearing among the pair of constant velocity universal joints are unitized. The present invention relates to a wheel bearing assembly (hereinafter referred to as an axle module), and more particularly, to an axle module that improves assembly workability to a vehicle.

  A power transmission device that transmits engine power of a vehicle such as an automobile to a wheel transmits power from the engine to the wheel, and also causes radial or axial displacement from the wheel that occurs when the vehicle bounces or turns when traveling on a rough road. For example, as shown in FIG. 8, one end of the drive shaft 100 interposed between the engine side and the drive wheel side is connected to a sliding type constant velocity universal joint 101. The other end is connected to a wheel 105 via a wheel bearing device 104 including a fixed type constant velocity universal joint 103.

  Such a wheel bearing device 104 includes a wheel bearing 106 referred to as a third generation and a fixed type constant velocity universal joint 103 detachably connected to the wheel bearing 106. In recent years, this wheel bearing device 104 tends to shift to a so-called fourth generation structure in which the wheel bearing 106 and the fixed type constant velocity universal joint 103 are unitized for further light weight and compactness.

  A typical example of such a wheel bearing device will be described with reference to FIG. 2 showing a first embodiment of the present invention. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outboard side (left side in the drawing), and the side closer to the center is referred to as the inboard side (right side in the drawing).

  This wheel bearing device comprises a hub wheel 1, a double row rolling bearing 2 and a constant velocity universal joint 3 as a unit. The hub wheel 1 is made of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and a wheel mounting flange 4 for mounting a wheel (not shown) to the end on the outboard side is integrated. And hub bolts 6 are implanted at equal circumferential positions. Concave and convex portions 5 are formed on the inner peripheral surface of the hub wheel 1, and a hardened layer is formed with a surface hardness in the range of 54 to 64 HRC by heat treatment. As the heat treatment, local heating is preferable, and quenching by high-frequency induction heating that can set the hardened layer depth relatively easily is preferable.

  In addition, the uneven part 5 is formed in the shape of an iris knurl, and a cross groove formed by a plurality of annular grooves formed independently by turning or the like and a plurality of axial grooves formed by broaching or the like substantially orthogonal to each other. Alternatively, it consists of a cross groove composed of spiral grooves inclined with respect to each other. Further, in order to ensure good biting property, the tip of the concavo-convex portion 5 is formed in a spire shape such as a triangular shape.

  The double-row rolling bearing 2 includes an outer member 7, an inner member 8, and double-row rolling elements (balls) 9 and 9. The outer member 7 is formed of medium carbon steel containing carbon 0.40 to 0.80 wt% such as S53C, and integrally has a vehicle body mounting flange 7b for mounting on the knuckle N1 constituting the suspension device on the outer periphery, Double rows of outer rolling surfaces 7a, 7a are formed on the inner periphery. On the other hand, the inner member 8 refers to the hub wheel 1 and an outer joint member 14 to be described later fitted in a small diameter step portion 13 of the hub wheel 1, and the outer rolling surface 7 a of the outer member 7. , 7a is formed on the outer periphery of the hub wheel 1, and the inboard-side inner rolling surface 14a is formed on the outer periphery of the outer joint member 14, respectively. Double-row rolling elements 9 and 9 are accommodated between the rolling surfaces 7a and 1a and 7a and 14a, respectively, and are held by the cages 10 and 10 so as to be freely rollable. Seals 11 and 12 are attached to the ends of the double row rolling bearing 2 to prevent leakage of lubricating grease sealed inside the bearing and intrusion of rainwater and dust from the outside into the bearing. .

  The constant velocity universal joint 3 includes an outer joint member 14, a joint inner ring 15, a cage 16 and a torque transmission ball 17. And the outer joint member 14 is formed of medium carbon steel containing carbon 0.40 to 0.80 wt% such as S53C, a cup-shaped mouth portion 18, and a shoulder portion 19 that forms the bottom of the mouth portion 18, A hollow shaft portion 20 extending in the axial direction from the shoulder portion 19 is provided. On the outer periphery of the shaft portion 20, there are formed a small diameter step portion 20a fitted into the small diameter step portion 13 and a fitting portion 20b extending in the axial direction from the small diameter step portion 20a.

  In addition, eight curved track grooves 18 a extending in the axial direction are formed on the inner periphery of the mouse portion 18, and eight track grooves 15 a facing the track grooves 18 a are formed on the outer periphery of the joint inner ring 15. Has been. A torque transmission ball 17 is accommodated between the track grooves 18a and 15a. In the outer joint member 14, a predetermined hardened layer is formed on the surfaces of the track groove 18 a, the shoulder portion 19, and the shaft portion 20 by induction hardening or the like.

  Then, the shaft portion 20 of the outer joint member 14 is fitted into the hub wheel 1, a diameter expanding jig such as a mandrel is pushed into the shaft portion 20 to expand the fitting portion 20 b, and the fitting portion 20 b is connected to the hub wheel. 1, the hub wheel 1 and the outer joint member 14 are integrally plastically joined. As a result, it is not necessary to control the preload by tightening firmly with a nut or the like as in the prior art, so that the weight and size can be reduced and the strength and durability of the hub wheel 1 can be improved and long. The amount of preload can be maintained for a period. Furthermore, it has the feature that it can be easily incorporated into a vehicle.

  On the outer periphery of the hub wheel 1, a hardened layer is formed by induction hardening on the surface of the seal land portion, the inner rolling surface 1 a, and the small diameter step portion 13 with which the seal lip of the seal 11 on the outboard side slides. Moreover, the fitting part 20b whose diameter is expanded is an unquenched part having a surface hardness of 24 HRC or less after forging, and the hardness difference between the surface hardness 54 to 64 HRC of the uneven part 5 of the hub wheel 1 is 30 HRC or more. It is preferable to set to. Thereby, the fitting part 20b can bite into the uneven | corrugated | grooved part 5 easily and deeply, and both can be firmly plastic-bonded without the front-end | tip of the uneven | corrugated | grooved part 5 being crushed.

Here, the outer diameter of the fitting surface 7c of the outer member 7 fitted to the inner diameter of the knuckle N1 is Da, and the maximum outer diameter of the constant velocity universal joint 3, here, the outer periphery of the mouse portion 18 is mounted. When the maximum outer diameter of the boot 21 is Db, Da ≧ Db is set. As a result, the double row rolling bearing 2 and the constant velocity universal joint 3 can be assembled in advance and then assembled to the knuckle N1, further improving the workability of the assembly to the vehicle, and the work of inspection and repair. Also improves.
JP 2001-171308 A

  In such a conventional wheel bearing device, the outer diameter Da of the fitting surface 7 c of the outer member 7 is made larger than the maximum outer diameter Db of the constant velocity universal joint 3, so that it can freely move with the double row rolling bearing 2. The wheel bearing device integrated with the joint 3 can pass through the knuckle N1. Furthermore, if the gap between the outer diameter Da of the fitting surface 7c of the outer member 7 and the maximum outer diameter Db of the constant velocity universal joint 3 can be increased, the assembly workability can be improved. Not only the member 7 but also the knuckle N1 is increased in weight, and the effect as a light and compact device is halved. In addition, when the inboard side sliding type constant velocity universal joint (not shown) is a flange type (see FIG. 8), the outer diameter Da of the fitting surface 7c of the outer member 7 or the inner diameter of the knuckle N1 is increased. It is extremely difficult to set a diameter larger than the outer diameter of the flange.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an axle module that improves assembly workability to a vehicle and stabilizes quality.

  In order to achieve such an object, the invention according to claim 1 of the present invention has a vehicle body mounting flange fixed to a knuckle constituting a suspension device, and a double row outer rolling surface is formed on the inner periphery. An outer member that is rotatably supported by the outer member via a plurality of rolling elements, a wheel mounting flange on the outer periphery, and a double-row inner rolling surface facing the double-row outer rolling surface, , A fixed type constant velocity universal joint having an outer joint member coupled to the wheel bearing, and a drive having one end coupled to the constant velocity universal joint. A sliding type constant velocity having an outer joint member that is integrally formed with a shaft and a plurality of mounting flanges that are connected to the other end of the drive shaft and extend radially on the outer periphery, and is fixed to the differential through the mounting flanges Consisting of a universal joint In the kusle module, the knuckle is formed with an inner circumferential surface having a shape along the outer contour of the outer joint member having the mounting flange, and the inner circumferential surface is larger than the maximum outer diameter of the pair of constant velocity universal joints. A configuration comprising an inner cylinder portion having an inner diameter formed in a diameter and a plurality of cutout portions having a shape along the outer contour of the mounting flange and having an inscribed circle diameter through which the mounting flange can pass is adopted. .

  Thus, a wheel bearing comprising an outer member having a vehicle body mounting flange fixed to the knuckle and an inner member integrally having a wheel mounting flange for mounting the driving wheel, and rotatably supporting the driving wheel, A fixed type constant velocity universal joint having an outer joint member connected to the wheel bearing, a drive shaft having one end connected to the constant velocity universal joint, and a radial connected to the other end of the drive shaft. A plurality of mounting flanges extending integrally with each other, and an axle module comprising a sliding type constant velocity universal joint having an outer joint member fixed to a differential through these mounting flanges, the knuckle has a mounting flange An inner peripheral surface having a shape along the outer contour of the outer joint member is formed, and the inner peripheral surface is formed to have a larger diameter than the maximum outer diameter of the pair of constant velocity universal joints. Each of the constant velocity universal joints is formed of an inner cylindrical portion having an inner diameter and a plurality of notches having an inscribed circular diameter through which the mounting flange can pass. Each of the outer joint members can be easily inserted into the knuckle without damaging the boot, and the axle module can be easily assembled to the knuckle to realize modularization of the undercarriage. Further, the vehicle can be mounted as it is, and the assembly workability of the vehicle can be further improved. Therefore, it is possible to provide an axle module with stable quality.

  In the invention according to claim 2, since the notch has an inscribed circle diameter formed larger than the circumscribed circle diameter of the mounting flange, the outer joint member is smoothly inserted into the knuckle. be able to.

  According to a third aspect of the present invention, the notch has an inscribed circle diameter that is substantially the same as or smaller than the circumscribed circle diameter of the mounting flange, and is annular at the base of the mounting flange. Since the groove is formed, the knuckle itself can be made compact, and the reduction in strength can be suppressed while reducing the weight.

  According to a fourth aspect of the present invention, the inner member integrally has a wheel mounting flange at one end, and the outer circumferential surface of the double row facing the double row outer rolling surface on the outer periphery. A hub wheel formed with one inner rolling surface, and an outer joint member formed with the other inner rolling surface of the double row inner rolling surfaces opposed to the double row outer rolling surface on the outer periphery; A hollow shaft portion integrally formed with the outer joint member is fitted into the inner diameter of the hub wheel formed with a hardened uneven portion, and a fitting portion formed on the shaft portion Since the hub wheel and the outer joint member are integrally plastically joined by enlarging the diameter and biting into the concave and convex portions, it is necessary to control the preload by firmly tightening with a nut or the like as in the past. This makes it possible to reduce the weight and size of the hub wheel, while reducing the strength and durability of the hub wheel. It is above and long term can maintain its preload. Furthermore, the ease of incorporation into the vehicle can be simplified.

  An axle module according to the present invention integrally includes a vehicle body mounting flange fixed to a knuckle constituting a suspension device, an outer member having a double row outer raceway formed on the inner periphery, and the outer member. And an inner member in which a wheel mounting flange and a double row inner rolling surface facing the outer rolling surface of the double row are formed on the outer periphery. A fixed type constant velocity universal joint having a wheel bearing and an outer joint member connected to the wheel bearing, a drive shaft having one end connected to the constant velocity universal joint, and connected to the other end of the drive shaft A plurality of mounting flanges extending radially on the outer periphery, and a sliding type constant velocity universal joint having an outer joint member fixed to the differential through these mounting flanges. The knuckle includes the mounting flange. An inner cylinder having an inner diameter formed along the outer contour of the outer joint member having a flange and having an inner diameter formed larger than the maximum outer diameter of the pair of constant velocity universal joints. And a plurality of notches having an inscribed circle diameter through which the mounting flange can pass, so that the boots of the respective constant velocity universal joints are damaged. Therefore, the outer joint member can be easily inserted into the knuckle, and the axle module can be easily assembled into the knuckle to realize modularization of the suspension. Further, the vehicle can be mounted as it is, and the assembly workability of the vehicle can be further improved. Therefore, it is possible to provide an axle module with stable quality.

  The vehicle body mounting flange that is fixed to the knuckle that constitutes the suspension system is integrated, the outer member with the double-row outer raceway formed on the inner periphery, and the wheel mounting flange at one end is integrated with the outer periphery. One inner rolling surface of the double row inner rolling surfaces facing the outer rolling surface of the double row, a hub wheel formed with an uneven portion hardened on the inner periphery, and the double row on the outer periphery. The outer joint member of the constant velocity universal joint in which the other inner rolling surface of the double row inner rolling surfaces facing the outer rolling surface and the hollow shaft portion are formed, and the rolling surface between the two rolling surfaces. A plurality of rolling elements accommodated in a freely movable manner, and the shaft portion of the outer joint member is fitted into the hub wheel, and the fitting portion formed in the shaft portion is expanded in diameter to form the unevenness. A bearing for a wheel comprising an inner member in which the hub wheel and the outer joint member are integrally plastically joined by biting into the portion. And a fixed type constant velocity universal joint connected to the wheel bearing, a drive shaft having one end connected to the constant velocity universal joint, and a plurality of radially extending outer circumferences connected to the other end of the drive shaft. And a sliding type constant velocity universal joint having an outer joint member fixed to the differential through the mounting flange. The knuckle has an inner shape of the outer joint member along the outline of the outer joint member. A peripheral surface is formed, and the inner peripheral surface has an inner cylinder portion having an inner diameter formed larger than the maximum outer diameter of the pair of constant velocity universal joints, and a shape along the outer contour of the mounting flange. And a plurality of notches having an inscribed circle diameter formed larger than the circumscribed circle diameter of the mounting flange.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a first embodiment of an axle module according to the present invention, and FIG. 2 is an enlarged view of a main part of FIG.

  The axle module transmits power from the engine to the wheels, and rotatably supports the wheels of the automobile with respect to the suspension device. The basic configuration of this axle module is that the hub wheel 1, the double row rolling bearing 2 and the fixed type constant velocity universal joint 3 are unitized, and the constant velocity universal joint 3 has a drive shaft D / D. And a sliding type constant velocity universal joint 22 connected via S. The wheel bearing device has a configuration referred to as a fourth generation, and has been described with reference to FIG. 2 as an example of a conventional wheel bearing device. Therefore, detailed description is omitted, and only the features of the present invention are described. Will be explained mainly.

  The outer joint member 14 of the constant velocity universal joint 3 on the outboard side that is a fixed type includes a cup-shaped mouth portion 18, a shoulder portion 19 that forms the bottom of the mouth portion 18, and an axial direction extending from the shoulder portion 19. It has a hollow shaft portion 20. Eight track grooves 18 a extending in the axial direction are formed on the inner periphery of the mouse portion 18, and eight track grooves 15 a facing the track grooves 18 a are formed on the outer periphery of the joint inner ring 15. Yes. A torque transmission ball 17 is accommodated between the track grooves 18a and 15a. A resin boot 21 is mounted on the outer periphery of the mouth portion 18 on the opening side to prevent leakage of grease sealed in the mouse portion 18 and intrusion of rainwater or dust from the outside into the joint. .

  Here, the compact type constant velocity universal joint 3 having eight balls is illustrated, but not limited to this, the maximum outer diameter of the constant velocity universal joint 3, that is, the outer diameter Db of the boot 21 in the present embodiment is As long as it is set to be equal to or smaller than the outer diameter Da of the fitting surface 7c of the side member 7, a constant velocity universal joint composed of six general balls may be used. Furthermore, the constant velocity universal joint 3 may be a fixed type, and the track groove is not limited to a curved shape, and is a constant velocity universal joint such as a track groove having a straight portion, a so-called undercut free type. Also good.

  As shown in FIG. 1, one end of the drive shaft D / S is fitted into a joint inner ring 15 of the constant velocity universal joint 3 via a serration 15b, and the other end is slidably fixed to a differential (not shown). It is connected to a dynamic type constant velocity universal joint 22. The constant velocity universal joint 22 on the inboard side includes an outer joint member 23, a tripod member 24 having three leg shafts 24a projecting from the outer periphery thereof at equal intervals, and needle rollers 25 on these leg shafts 24a. , And a roller 26 that is rotatably inserted through the roller. The outer joint member 23 includes a cylindrical outer tube portion 27 formed of medium carbon steel containing carbon 0.40 to 0.80 wt% such as S53C, and a mounting flange extending in the radial direction from the bottom portion of the outer tube portion 27. 28. The mounting flange 28 is formed with a screw hole 28a for fixing to a differential (not shown). In addition, the outer cylinder part 27 is not restricted to a cylindrical shape, For example, the outer periphery may be formed in the flower shape corresponding to the track groove 27a.

  Further, three linear track grooves 27a extending in the axial direction are formed on the inner periphery of the outer cylindrical portion 27, and the roller 26 rolls on the track grooves 27a. In the outer joint member 23, a predetermined hardened layer is formed on the surface of the track groove 27a by induction hardening or the like. Further, a boot 29 made of synthetic rubber or the like is attached to the outer periphery of the outer cylinder portion 27 on the opening side, and leakage of grease sealed in the outer cylinder portion 27 and rainwater, dust, etc. enter the joint from the outside. Is preventing. Here, the tripod type is exemplified for the constant velocity universal joint 22 on the inboard side. However, the present invention is not limited to this, and a sliding type constant velocity universal joint may be used. It may be a double offset type constant velocity universal joint (DOJ) using

  FIG. 3 is a schematic view showing the outer joint member 23 on the inboard side in the present embodiment. The outer tubular portion 27 of the outer joint member 23 has a plurality (3) extending radially from the bottom between the track grooves 27a. The mounting flanges 28 are integrally formed, and screw holes 28a for fixing to a differential (not shown) are formed on the outer peripheral portions of the mounting flanges 28.

  As shown in FIG. 4, the knuckle N <b> 1 is formed with an inner peripheral surface 30 having a shape along the outline of the outer joint member 23. That is, the inner peripheral surface 30 includes an inner cylinder portion 30a having an inner diameter D1 formed slightly larger than the maximum outer diameters Db and Dc (see FIG. 1) of the constant velocity universal joints 3 and 22, and a mounting flange. 28, and includes a plurality of (three) cutout portions 30b having an inscribed circle diameter D3 formed slightly larger than the circumscribed circle diameter D2 of the mounting flange 28. Further, a bolt hole 31 for fixing the outer member 7 constituting the wheel bearing device is formed between the notches 30b of the knuckle N1.

  Thus, the knuckle N1 is formed with the inner peripheral surface 30 having a shape along the outline of the outer joint member 23 having the mounting flange 28, and is larger than the maximum outer diameters Db and Dc of the constant velocity universal joints 3 and 22. Since the inner diameter D1 of the diameter is formed, the outer joint member 23 can be easily inserted into the knuckle N1 without damaging the boots 21, 29, and the axle module can be easily attached to the knuckle N1. It can be assembled and modularization of the suspension can be realized. Further, the vehicle can be mounted as it is, and the assembly workability of the vehicle can be further improved.

  In the present embodiment, the wheel bearing device is exemplified by the fourth generation structure in which the hub wheel 1, the double row rolling bearing 2 and the constant velocity universal joint 3 are unitized. However, the axle module according to the present invention is illustrated. Is to realize modularization of the undercarriage, so that, for example, the first to third generations in which the constant velocity universal joint is detachably connected via a serration or the like regardless of the structure of the wheel bearing device. A wheel bearing device having a structure may be used.

  FIG. 5 is a front view in which a part of the outer joint member in the axle module according to the present invention is cut, FIG. 6 (a) is a sectional view showing the knuckle, and FIG. 5 (b) is a front view thereof. In addition, the same code | symbol is attached | subjected to the site | part, the same components, or site | part which has the same function as embodiment mentioned above, and the detailed description is abbreviate | omitted.

  The outer joint member 33 in the sliding type inboard side constant velocity universal joint has three mounting flanges 28 extending radially outward from the bottom of the outer cylindrical portion 34, and the base of these mounting flanges 28. Is formed with an annular groove 35. Moreover, as shown in FIG. 6, the knuckle N2 is formed with an inner peripheral surface 36 having a shape along the outline of the outer joint member 33. That is, the inner peripheral surface 36 includes an inner cylinder portion 30a having an inner diameter D1 formed slightly larger than the maximum outer diameters Db and Dc (see FIG. 1) of the constant velocity universal joints 3 and 22, and a mounting flange. 28, and includes three cutout portions 36a having an inscribed circle diameter D4 formed slightly larger than the circumscribed circle diameter D2 of the mounting flange 28.

Next, a procedure for allowing the outer joint member 33 to pass through the knuckle N2 will be described with reference to FIG.
1. As shown to (a), only the attachment flange 28 is allowed to pass from the notch part 36 in the state which inclined the outer joint member 33 with respect to the knuckle N2.
2. Next, in a state where the annular groove 35 of the outer cylinder portion 34 of the outer joint member 33 is aligned with the position of the inner cylinder portion 30a of the knuckle N2 and the outer joint member 33 is eccentric, the inner cylinder portion 30a of the knuckle N2 The outer cylindrical portion 34 on the side facing the mounting flange 28 is passed.
3. Then, as shown in (b), the outer tube member 24 of the outer joint member 33 is inserted from the inner tube portion 30a of the knuckle N2 in a state where the inclination of the outer joint member 33 is returned and the shaft center coincides with the knuckle N2. Pass it to the board side (right side in the figure).

  As described above, since the annular groove 35 is formed at the base of the mounting flange 28, the outer joint member 33 can be smoothly inserted into the knuckle N2 as compared with the above-described embodiment, and the axle module can be easily installed. Can be assembled into a knuckle N2. Further, the inscribed circle diameter D4 of the notch 36a can be formed to be substantially the same or smaller than the circumscribed circle diameter D2 of the mounting flange 28, and the knuckle N2 itself can be made compact. In addition, a reduction in strength can be suppressed while achieving weight reduction.

  The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment, and is merely an example, and various modifications can be made without departing from the scope of the present invention. Of course, the scope of the present invention is indicated by the description of the scope of claims, and further, the equivalent meanings described in the scope of claims and all modifications within the scope of the scope of the present invention are included. Including.

  A unit cover according to the present invention is mounted on a drive shaft constituting a power transmission device of an automobile or the like and a constant velocity universal joint connected thereto, and improves protection and handling of the constant velocity universal joint. Regardless of the structure and specifications of the constant velocity universal joint and the wheel bearing connected to the constant velocity universal joint, the invention can be applied to an axle module in any power transmission device.

1 is a longitudinal sectional view showing a first embodiment of an axle module according to the present invention. It is a principal part enlarged view of FIG. FIG. 4 is a schematic diagram showing an outer joint member on the inboard side that constitutes the axle module according to the present invention, in which (a) is a front view of a section, and (b) is a side view thereof. (A) is sectional drawing which shows a knuckle. (B) is a front view same as the above. It is the front view which carried out the section which shows a 2nd embodiment in the outside joint member by the side of inboard concerning the present invention. (A) is sectional drawing which shows 2nd Embodiment of a knuckle. (B) is a front view same as the above. It is explanatory drawing which shows the procedure which lets an outer joint member pass in a knuckle, (a) shows the state which passed only the attachment flange of the outer joint member from the notch part of the knuckle, (b) shows the inside of a knuckle. The state which passed the outer cylinder part of the outer joint member from the cylinder part is shown. It is a longitudinal cross-sectional view which shows an example of the power transmission device incorporating the wheel bearing apparatus.

Explanation of symbols

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub wheel 1a, 14a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surface 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・.... Double-row rolling bearings 3, 22 ... Constant velocity universal joint 4 ... Wheel mounting flange 5 ······························· 6 ... Outer member 7a ... Outer rolling surface 7b ... Car body mounting flange 7c ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fitting surface 8 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner member 9 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・· Rolling element 10 ······································································ ········ Small diameter step portions 14, 23, 33 ···································································· Track groove 15b ... Serration 16 ... Cage 17 ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Torque transmission ball 18 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Mouse 19 ・ ・ ・ ・ ・ ・ Shoulder 20 ... Shaft 20b ... Fitting part 21, 29・ Boots 24 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Tripod member 24a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Leg shaft 25 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・... Needle roller 26 ... Roller 27 34 ································································· Mounting screw 28a Holes 30 and 36 ... Inner peripheral surface 30a ... Inner tube 30b and 36a ... Notch 31 ... Bolt hole 35 ... Annular groove 100 ... ·········· Drive shaft 101 ····································································································· ·································································· Wheel bearing device 105 106 ........ Bearings for wheels Da. ················· Outside diameter Db of outer member fitting surface ··········································· Diameter Dc ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Maximum outer diameter D1 of sliding type constant velocity universal joint ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner cylinder of knuckle The inner diameter D2 of the outer joint member is the diameter of the circumscribed circle D3, D4 ... of the knuckle notch Inscribed circle diameter D / S ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Drive shaft N1, N2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Knuckle

Claims (4)

An outer member integrally having a vehicle body mounting flange fixed to a knuckle that constitutes a suspension device, and an outer rolling surface of a double row formed on the inner periphery;
An inner member that is rotatably supported by the outer member via a plurality of rolling elements, and that has a wheel mounting flange and a double row inner rolling surface that faces the outer rolling surface of the double row on the outer periphery. Wheel bearing with,
And a fixed type constant velocity universal joint having an outer joint member connected to the wheel bearing;
A drive shaft having one end connected to the constant velocity universal joint;
A sliding type constant velocity universal joint connected to the other end of the drive shaft and integrally formed with a plurality of mounting flanges extending radially on the outer periphery and having an outer joint member fixed to the differential through the mounting flanges; Axle module consisting of
The knuckle is formed with an inner peripheral surface having a shape along the outer contour of the outer joint member having the mounting flange, and the inner peripheral surface is formed to have a larger diameter than the maximum outer diameter of the pair of constant velocity universal joints. An axle module comprising: an inner cylinder portion having an inner diameter; and a plurality of notches having an inscribed circle diameter that allows the mounting flange to pass through, and has a shape along the outer periphery of the mounting flange.   The axle module according to claim 1, wherein the notch has an inscribed circle diameter formed larger than a circumscribed circle diameter of the mounting flange.   The said notch has an inscribed circle diameter formed substantially the same diameter as the circumscribed circle diameter of the said attachment flange, or a small diameter, and the annular groove is formed in the base of the said attachment flange. Axle module.   The hub in which the inner member has a wheel mounting flange integrally at one end, and one inner rolling surface of the double row inner rolling surfaces facing the double row outer rolling surface is formed on the outer periphery. A hardened concavo-convex portion is formed, which is composed of a ring and an outer joint member in which the other inner rolling surface of the double row inner rolling surfaces facing the outer rolling surface of the double row is formed on the outer periphery. A hollow shaft portion integrally formed with the outer joint member is fitted inside the inner diameter of the hub wheel, and the fitting portion formed on the shaft portion is expanded to bite into the uneven portion. The axle module according to any one of claims 1 to 3, wherein the hub wheel and the outer joint member are integrally plastically coupled.

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