WO2008056440A1 - Support structure for suspension device - Google Patents

Abstract

[PROBLEMS] A support structure for a suspension device, increased in rigidity and reduced in weight and cost. [MEANS FOR SOLVING PROBLEMS] The support structure is constructed from a double-axle suspension. An upper rotation mechanism (4) of the support structure has an upper pivot shaft (29) detachably joined to a vehicle body-side knuckle (2) by a fixation bolt (28) and also has an upper support bearing (30) installed between the upper pivot shaft (29) and a wheel-side knuckle (1). The upper support bearing (30) is a back-to-back mounted full complement roller-type double-row tapered roller bearing having an outer ring (31) fitted in a hollow cylindrical section (1a) of the wheel-side knuckle (1) and having, formed on its inner periphery, tapered double-row outer rolling surfaces (31a), a pair of inner rings (33) having, formed on its outer periphery, double-row tapered inner rolling surfaces (33a) facing the double-row outer rolling surfaces (31a), and double-row tapered rollers (32) rollably received between the rolling surfaces. The upper support bearing (30) is filled with a solid lubricating agent (37).

Description

 Specification

 Suspension support structure

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a support structure for a suspension system of a vehicle such as an automobile, and more particularly to a support structure for a suspension system including a double axle suspension (hereinafter referred to as D A S).

 Background art

 [0002] D AS is known as a vehicle suspension system. As shown in Fig. 17, this DAS has a knuckle that makes up the suspension system. 1 0 1 force The knuckle on the vehicle body that receives the vertical movement of the suspension system. The wheel side knuckle has a two-part structure of 1 0 1 b. Here, the lower part of the vehicle body side rail 10 1 a formed in a bifurcated shape is rotatably connected to the outer end portion of the lower link 103. The lower link 103 extends inward in the vehicle width direction, and its inner end is connected to a vehicle body side member (not shown) such as a suspension member so as to be swingable in the vertical direction. A shock absorber 10 4 is arranged between the upper part of the vehicle body side knuckle 10 1 a and the vehicle body, and a coil spring (see FIG. (Not shown) are arranged substantially coaxially. The wheel 10 2 is rotatably supported by a wheel knuckle 1 0 1 b via a wheel bearing 1 0 5.

Here, as shown in FIG. 18, the upper part of the wheel side knuckle 1 0 1 b is rotatably supported by the vehicle body side knuckle 1 0 1 a via the upper rotating mechanism 1 0 6. Yes. The upper pivot mechanism 1 0 6 includes an upper pivot 1 0 8 fastened to the vehicle body side knuckle 1 0 1 a via a fixed port 1 0 7, and the upper pivot 1 0 8 and the wheel side knuckle 1 0 1 and an upper support bearing 1 0 9 mounted between them. The upper support bearing 10 09 is composed of, for example, a double row conical roller bearing, and an outer ring 1 1 0 fitted inside the wheel side knuckle 1 0 1 b, and a double row cone of the outer ring 1 1 0 A pair of inner rings 1 1 2, 1 1 2 rotatably inserted through rollers 1 1 1, 1 1 1 I have. The upper pivot 1 0 8 has a flange 1 0 8 a at one end, and between the flange 1 0 8 a and the upper part of the wheel side knuckle 1 0 1 b and the vehicle body side knuckle 1 0 1 a A pair of inner rings 1 1 2 and 1 1 2 are clamped in the axial direction with a lid member 1 1 3 interposed between them.

[0004] On the other hand, the lower part of the wheel side knuckle 1 0 1 b is rotatably supported by the vehicle side knuckle 1 0 1 a via the lower rotation mechanism 1 1 4. The lower rotating mechanism 1 1 4 includes a lower pivot 1 1 5 fastened to a vehicle body knuckle 1 0 1 a via a fixed port 1 0 7, a lower pivot 1 1 5 and a wheel knuckle 1 0 1 b And a lower support bearing 1 1 6 mounted between the two. The lower support bearing 1 16 is composed of a needle roller bearing. The above-described upper and lower rotating mechanisms 10 6 and 1 14 constitute a so-called kingpin shaft 1 17. This kingpin shaft 1 1 7 is set to be inclined at a predetermined angle with respect to the center 1 1 8 of the wheel 10 2, and the wheel side knuckle 1 0 1 b can be rotated around the kingpin shaft 1 1 7 It is.

 [0005] The wheel bearing 1 0 5 is fitted between a hub wheel 1 1 9 that supports the wheel 1 0 2 and a wheel side knuckle 1 0 1 b. In addition, rotational torque from the engine is transmitted to the hub wheel 1 1 9 via the drive shaft 1 2 1 by the constant velocity universal joint 120.

[0006] Here, when the steering force is transmitted to the wheel side knuckle 1 0 1 b via a steering mechanism (not shown), the wheel side knuckle 1 0 1 b is converted into an upper and lower turning mechanism 1 0 6, 1 1 4 turns around the kingpin shaft 1 1 7 and the wheel 1 0 2 supported by the wheel knuckle 1 0 1 b is steered. The weight of the vehicle body is supported by the wheel via a shock absorber 10 4, a vehicle body side knuckle 10 1 a, an upper turning mechanism 1 0 6, and a wheel side knuckle 1 0 1 b. The vertical movement of the wheel 10 2 caused by the vehicle passing through the unevenness on the road surface is attenuated by the expansion and contraction of the shock absorber 1 0 4, and the shock absorber 1 Absorbed by deflection of coil spring arranged coaxially with 04. Patent Document 1: EP 1 3 1 9 5 3 3 A 1 Gazette Disclosure of the Invention Problems to be Solved by the Invention

 [0007] In such a conventional DAS, the knuckle, which is originally integral, is divided into the vehicle body side knuckle 1 0 1 a and the wheel side knuckle 1 0 1 b, so the number of parts and the supporting nodes increase, and the weight increases. As a result, the steering stability may be reduced due to the reduced rigidity. In order to solve these problems, for example, it is conceivable to apply a preload to the upper support bearings 109, but at such an assembly site, this kind of management work becomes complicated and the workability is reduced, and the manufacturing costs are reduced. There is a problem that soot is soaring. Furthermore, in recent years, weight reduction has been desired in order to reduce the weight of suspension devices and wheel bearing devices, so-called under-panel weight, in order to improve vehicle fuel efficiency and driving stability.

[0008] In addition, in the conventional DAS, for example, the upper support bearing 1009 that supports the vehicle body side knuckle 1 0 1 a is not a rotational motion but a swinging motion like a normal bearing, Since it is exposed to the vertical movement of the device and the vehicle, and its rotation axis is substantially vertical, the lubricating grease enclosed inside tends to be biased downward due to vibration or gravity. Therefore, it is difficult to exhibit good and stable lubricity, and the durability of the upper support bearing 109 may be reduced due to poor lubrication.

 Further, the wheel bearing 10 5 includes an outer ring 1 0 5 a, a pair of inner rings 1 0 5 b and 1 0 5 b, and double-row poles 1 0 5 c and 1 0 5 c, so-called It consists of a first generation structure. The inner rings 1 0 5 b and 1 0 5 b are press-fitted and fixed to the hub ring 1 1 9 and the outer ring 1 0 5 a is press-fitted and fixed to the wheel knuckle 1 0 1 b. If the outer diameter of the outer ring 1 0 5 a is increased in order to increase the capacity, the outer diameter of the wheel knuckle 1 0 1 b itself also increases, and the hub port fixed to the hub wheel 1 1 9 (not shown) ) And the wheel side knuckle 1 0 1 b.

[0010] Here, even if the outer diameter of the wheel side knuckle 1 0 1 b is suppressed by avoiding interference with the hub port, when replacing the hub port in the repair market, the wheel side nut Since the hub port cannot be removed from the hub wheel 1 1 9 due to the hindrance of the wheel 1 0 1 b, the constant velocity universal joint 1 2 0 and the hub wheel 1 1 9 are disassembled, and the wheel side knuckle 1 0 1 There was a problem that it was necessary to remove the hub bearing 1 0 5 from b and then replace the hub pole 卜. This not only limited the layout, but also made it difficult to replace the hub port, resulting in a significant reduction in workability and a need for improvement.

 [001 1] In recent years, with light weight and compactness, wheel bearings 10 5 tend to shift from the 1st generation structure to the 3rd generation or 4th generation structure with the aim of increasing load capacity and rigidity However, in the case of the 4th generation structure, the bearing rolling surface is formed directly on the hub wheel and constant velocity universal joint, and because these are unitized, there is a problem that the hubpol can not be replaced during repair. Was inherent.

 [0012] The present invention has been made in view of such a conventional problem, and provides a support structure for a suspension device that achieves light weight, compactness, high rigidity, and low cost. With the goal.

 [0013] Another object of the present invention is to improve the durability by improving the lubricity of the support bearing and to improve the workability at the time of repair.

 Means for solving the problem

[0014] In order to achieve the object, the present invention comprises a two-part structure of a wheel side knuckle that receives turning of a wheel and a vehicle body side knuckle that receives vertical movement of a suspension device, and the wheel side knuckle is used for a wheel. In the support structure of the suspension device that rotatably supports the wheel via the bearing device, and is rotatably connected to the vehicle body side knuckle extending in the vehicle width direction via the upper and lower rotation mechanisms, The upper turning mechanism includes an upper pivot that is separably coupled to the vehicle body side knuckle via a fixed port, and an upper support bearing that is mounted between the upper pivot and the wheel side knuckle. The upper support bearing is fitted into the cylindrical portion of the wheel-side knuckle, and an outer ring having a tapered double row outer raceway formed on the inner circumference, and the outer raceway of these double rows on the outer circumference. Tapered facing Back with a pair of inner wheels side rolling surface is formed, and said double row tapered rollers rollably contained between the two rolling surfaces It is composed of a face-matching type full-roller double row tapered roller bearing. ■ ■ ■ Claim 1

 [0015] Thus, in the support structure of the suspension device including the double axle suspension, the upper pivot mechanism is detachably coupled to the vehicle body side knuckle via the fixed port, and the upper pivot and the wheel side An upper support bearing mounted between the knuckle and the upper support bearing is fitted into the cylindrical portion of the wheel knuckle, and a tapered double-row outer rolling surface is formed on the inner periphery. An outer ring, a pair of inner rings having a tapered inner rolling surface facing the outer surface of the double row on the outer circumference, and a double row of tapered rollers accommodated in a freely rolling manner between the two rolling surfaces The back-to-back type full-roller double-row tapered roller bearing with a large capacity can accommodate more tapered rollers in the same space as before, and the upper support bearing has a high load capacity. Can be made more rigid . On the other hand, even if the size of the tapered roller is set small, the load capacity and rigidity can be secured, and space can be saved. Lightweight ■ The suspension support structure is designed to increase the rigidity and reduce the cost. Can be provided.

 [001 6] Preferably, as in the present invention, if the upper support bearing is filled with a solid lubricant, good lubricity can be obtained, and the cone support can be removed when the upper support bearing is assembled. It can prevent and hold the tapered roller stably. ■ ■ ■ Claim 2

 [001 7] Further, as in the present invention, the lower rotating mechanism is fixed to the vehicle body side knuckle and is connected to the vehicle body side knuckle in a separable manner, and between the lower axis and the wheel side knuckle. The lower support bearing is composed of a full roller needle roller bearing, and if the lower support bearing is filled with a solid lubricant, the lower support bearing is loaded with a high load. Capacitance and rigidity can be increased, good lubricity can be obtained, and needle rollers can be held stably. ■ ■ ■ Claim 3

[0018] Further, as in the present invention, the solid lubricant comprises 95 to 1 wt% of ultra high molecular weight polyethylene having an average molecular weight of about 1 to 5 X 10 ^{6 and} the ultra high molecular weight polyethylene. It may be possible to have 5 to 99 wt% grease with a melting point higher than the gelling temperature. ■ ■ ■ Claim 4

 [0019] Further, as in the present invention, the solid lubricant may be composed of a solid component made of foamed resin and a lubricant component made of grease. ■ ■ ■ Claim 5

 [0020] Further, as in the present invention, if an annular connecting ring having a substantially U-shaped cross section is attached to a small diameter side end portion of the pair of inner rings by pressing a steel plate, The inner ring can be connected together, and the disassembly and assembly of the upper support bearing is improved. ■ ■ ■ Claim 6

 [0021] Further, as in the present invention, the wheel bearing device has a fourth generation structure in which a hub wheel, a double row rolling bearing, and a constant velocity universal joint are unitized, and the wheel side is arranged on the outer periphery. It has a body mounting flange that can be attached to the knuckle, an outer member with a double row outer raceway formed on the inner periphery, and a wheel mounting flange for mounting a wheel on one end. A hub ring formed with one inner rolling surface facing the outer rolling surface of the double row, a cylindrical small-diameter step portion extending in an axial direction from the inner rolling surface, and an internal fit in the hub ring An inner member comprising an outer joint member of the constant velocity universal joint, which has a hollow shaft portion integrally formed, and has the other inner rolling surface opposed to the outer rolling surface of the double row on the outer periphery. And can be rolled between the rolling surfaces of the inner member and the outer member. If the hub wheel and the outer joint member are integrally plastically connected, it is necessary to control the preload by tightening firmly with a nut or the like as before. It is possible to reduce the weight, make it compact, improve the hub wheel strength, durability, and maintain the preload amount for a long time. Can be used. ■ ■ ■ Claim 7

[0022] Further, the present invention has a two-part structure of a wheel side knuckle that receives the turning of the wheel and a vehicle body side knuckle that receives the vertical movement of the suspension device, and the wheel side knuckle passes through the wheel bearing device. In the supporting structure of the suspension device, the wheel side knuckle is rotatably connected to the vehicle body side knuckle extending substantially in the vehicle width direction via upper and lower rotation mechanisms. A shaft hole is formed in A pivot shaft is separably fixed to the shaft hole, a bearing hole is formed in the vehicle body side knuckle, and upper and lower support bearings are respectively mounted between the bearing hole and the pivot shaft. ■ ■ ■ Claim 8

[0023] In this way, it consists of a two-part structure of the wheel side knuckle that receives the turning of the wheel and the vehicle body side knuckle that receives the vertical movement of the suspension device, and the wheel side knuckle rotates the wheel via the wheel bearing device. In the support structure of the suspension device that is supported freely and is pivotably connected to the vehicle body side knuckle extending in the vehicle width direction via the upper and lower rotation mechanisms, a shaft hole is formed in the wheel side knuckle Since the pivot shaft is separably fixed to the shaft hole, a bearing hole is formed in the vehicle body side knuckle, and the upper and lower support bearings are respectively mounted between the bearing hole and the pivot shaft. The weight of the side knuckle is reduced, the steering force is reduced, the steering performance is improved, and the unit including the upper support bearing and the lower support bearing can be attached and detached by inserting and removing the pivot. Improves.

[0024] Further, as in the present invention, if the upper support bearing is constituted by a single-row tapered roller bearing or an angular ball bearing, a preload is applied to the upper support bearing according to the weight of the vehicle. In addition to achieving compactness, it is possible to provide a rotating mechanism that does not play even if the upper support bearing is a single row. ■ ■ ■ Claim 9

 [0025] Further, as in the present invention, if the lower support bearing is constituted by a single row deep groove ball bearing, the internal clearance is eliminated due to the axial displacement of the upper support bearing, and the pole is slightly contacted. It is possible to provide a pivoting mechanism that does not play by contact with an angle with an angle. ■ ■ ■ Claim 1 0

 [0026] Further, as in the present invention, an annular groove is formed on the outer periphery of the pivot shaft, and a fixing screw is fastened by projecting into the shaft hole of the wheel side knuckle, and the fixing screw is inserted into the annular groove. If the pivot is positioned and fixed in the axial direction by engaging, the pivot can be positioned and fixed to the knuckle on the wheel side with a simple configuration, and a work space can be secured to improve workability. . ■ ■ ■ Claim 1 1

[0027] Further, as in the present invention, the wheel bearing device comprises a hub wheel and a double row rolling shaft. The double-row rolling bearing is formed by unitizing a receiving joint and a constant velocity universal joint, an outer member in which a double-row outer rolling surface is integrally formed on an inner periphery, and a wheel for attaching a wheel to one end. A hub wheel having a wheel mounting flange integrally formed on the outer periphery and formed with an inner rolling surface facing one of the outer rolling surfaces of the double row, and fitted into the hub wheel, and the double row on the outer periphery. An inner member made of an outer joint member of the constant velocity universal joint formed with an inner rolling surface facing the other of the outer rolling surfaces, and rolling between both rolling surfaces of the inner member and the outer member. If it is set so that the inner diameter of the wheel side knuckle is larger than the maximum outer diameter of the constant velocity universal joint, it is lightweight. The hub ring and double-row rolling bearing and constant speed can be freely Hand assembly workability can be assembled to the car wheel side knuckle in Yunitto of the state is to improve.

 ■ ■ ■ Claim 1 2

 [0028] Further, as in the present invention, the outer member of the wheel bearing device is press-fitted and fixed to the wheel side nut, and at the position corresponding to the hub port, the end face on one side of the wheel side knuckle If a recess is formed at one location, it is possible to easily replace the hub pole 卜 without interfering with the wheel knuckle, and to provide a suspension support structure that improves workability during repair. . ■ ■ ■ Claim 1 3

 [0029] Further, as in the present invention, if the recess is formed in the vicinity of the center avoiding the vertical direction of the vertical line with respect to the road surface, the wheel bearing is provided via the wheel mounting flange when the vehicle turns. Sufficient durability can be ensured without reducing the strength and rigidity of the wheel side knuckle even with the moment load applied to the equipment. ■ ■ ■ Claim 1 4

 The invention's effect

[0030] The support structure of the suspension device according to the present invention has a two-part structure of a wheel side knuckle that receives turning of the wheel and a vehicle body side knuckle that receives vertical movement of the suspension device, and the wheel side knuckle is a wheel. The wheel is rotatably supported via the bearing device and the vehicle body side knuckle extending substantially in the vehicle width direction via the upper and lower rotating mechanisms. In the support structure of the suspension device connected so as to be rotatable, the upper pivot mechanism force is coupled to the vehicle body side knuckle through a fixed port so as to be separable, and the upper pivot and the wheel side An upper support bearing mounted between the knuckle and the upper support bearing is fitted into the cylindrical portion of the wheel-side knuckle to form a tapered double row outer rolling surface on the inner periphery. An outer ring formed on the outer circumference, a pair of inner rings each having a tapered inner rolling surface facing the outer rolling surfaces of these double rows on the outer periphery, and a rollable housing between the two rolling surfaces. Since it is composed of back-to-back type full-row double row tapered roller bearings with double row tapered rollers, more tapered rollers can be accommodated in the same space as before, and the upper support bearing High load capacity and high rigidity can be achieved. On the other hand, even if the size of the tapered roller is set to a small size, load capacity and rigidity can be ensured, and space can be saved. Light weight ■ High rigidity and low cost support structure Can be provided.

 BEST MODE FOR CARRYING OUT THE INVENTION

 [0031] It has a two-part structure of a wheel side knuckle that receives the turning of the wheel and a vehicle body side knuckle that receives the vertical movement of the suspension device, and the wheel side knuckle can freely rotate the wheel via a wheel bearing device. And a suspension structure supporting the vehicle body side knuckle extending substantially in the vehicle width direction via upper and lower rotating mechanisms, wherein the upper rotating mechanism includes the upper rotating mechanism, An upper pivot that is separably coupled to the vehicle body side knuckle via a fixed port; and an upper support bearing that is mounted between the upper pivot and the wheel side knuckle. An outer ring fitted inside the cylindrical portion of the side knuckle and formed with a tapered double row outer rolling surface on the inner periphery, and a tapering / inner inner rolling facing the outer rolling surface of these double rows on the outer periphery A pair of inner rings on which running surfaces are formed; It consists of a back-to-back type full-roller double-row conical roller bearing with a double-row tapered roller accommodated so as to roll between the rolling surfaces. The upper support bearing is filled with a solid lubricant. Has been. Example 1

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a longitudinal sectional view showing an embodiment of a support structure for a suspension device according to the present invention, FIG. 2 is a longitudinal sectional view showing a wheel bearing device of FIG. 1, and FIG. 3 is an upper rotating machine of FIG. Fig. 4 (a) is a longitudinal sectional view showing the inner ring and rolling element subassembly constituting the upper support bearing of Fig. 3, and (b) is a longitudinal sectional view showing the upper support bearing in the structure.

It is an arrow view along the IV_IV line of (a). In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outer side (left side in the drawing), and the side closer to the center is referred to as the inner side (right side in the drawing).

 [0033] This suspension device constitutes a DAS having a two-part structure of a wheel side knuckle 1 that receives turning of a wheel (not shown) and a vehicle body side knuckle 2 that receives vertical movement of the suspension device. . The wheel side knuckle 1 supports the wheel rotatably via the wheel bearing device 3 and extends substantially in the vehicle width direction and is located on the outer side in the radial direction of the wheel side knuckle 2 2 The upper and lower rotating mechanisms 4 and 5 are connected to each other in a rotatable manner.

 [0034] As shown in an enlarged view in Fig. 2, the wheel bearing device 3 is referred to as a fourth generation in which a hub wheel 6, a double row rolling bearing 7 and a constant velocity universal joint 8 are unitized. It has a configuration. The hub wheel 6 integrally has a wheel mounting flange 9 for mounting a wheel at an end portion on the outer side, and hub ports 9a are implanted at circumferentially equidistant positions. The hub ring 6 is made of medium and high carbon steel containing carbon 0.40 to 0.80% by weight, such as S 53 C, and has an uneven surface 10 formed on its inner peripheral surface, and the surface hardness is increased by induction hardening. A curing treatment is applied in the range of 5 8 to 6 4 HRC. The concavo-convex portion 10 is formed in a single iris mouthlet, and a plurality of annular grooves formed independently by turning or the like and a plurality of axial grooves formed by broaching or the like are substantially orthogonal to each other. Or 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 10 is formed in a spire shape such as a triangular shape.

The double-row rolling bearing 7 includes an outer member 11, an inner member 12, and double-row rolling elements (poles) 13 and 13. The outer member 1 1 integrally has a vehicle body mounting flange 1 1 b attached to the wheel side knuckle 1 on the outer periphery, and has a double row outer periphery on the inner periphery. Side rolling surfaces 1 1 a and 1 1 a are formed.

[0036] The inner member 12 is composed of a hub ring 6 and an outer joint member 17 to be described later that is fitted in a small diameter step portion 6b of the hub ring 6 and is arranged on the outer periphery. Double row outer rolling surface 1 1 a, 1 1 1 (outer side) inner rolling surface 6 a facing the outer circumference of the hub wheel 6 and the other (inner one side) inner rolling surface 1 7 a is the outer joint member

1 is formed on the outer periphery of 7, respectively. And the double row rolling elements 1 3 and 1 3 are accommodated between these rolling surfaces 1 1 a and 6 a and 1 1 a and 1 7 a, respectively,

It is held by 1 4 and 1 4 so that it can roll freely. In addition, seals 15 and 16 are attached to the end of the outer member 1 1 to prevent leakage of lubricating grease sealed inside the bearing, and prevent rainwater and dust from entering the bearing from the outside. is doing.

The constant velocity universal joint 8 includes an outer joint member 17, a joint inner ring 18, a cage 19, and a torque transmission pole 20. The outer joint member 17 includes a cup-shaped mouse part 2 1, a shoulder part 2 2 that forms the bottom part of the mouse part 21, and a hollow shaft part 2 3 that extends in the axial direction from the shoulder part 2 2. Have. On the outer periphery of the shaft 23, there are a small diameter step 2 3 a fitted into the small diameter step 6 b of the hub wheel 6, and a fitting portion 2 3 b extending in the axial direction from the small diameter step 2 3 a. And are integrally formed. Mouse part 2

Boots 2 4 are attached to the outer periphery of the opening 1 and the end cap 2 5 attached to the hollow shaft 2 3 leaks grease sealed in the mouse 2 1 and rainwater and dust from the outside. Etc. are prevented from entering the inside of the joint.

[0038] Further, the outer joint member 17 is formed of medium-high carbon steel containing carbon 0.40 to 0.80% by weight such as S53C, and the small diameter step from the shoulder portion 22 to the shaft portion 23. Part 2 3 a is hardened by induction hardening to a surface hardness in the range of 58 to 64 HRC. Note that the fitting portion 2 3 b of the shaft portion 2 3 is kept in the hardness after forging.

Here, the hub ring 6 and the outer joint member 17 are fixed by plastic coupling. That is, the shaft portion 2 3 of the outer joint member 17 is fitted into the hub wheel 6, and a diameter expanding jig such as a mandrel is pushed into the hollow shaft portion 23 to expand the diameter of the fitting portion 2 3b. The fitting part 2 3 b bites into the uneven part 10 of the hub wheel 6 and caulked, 6 and the outer joint member 17 are joined together. As a result, it is not necessary to control the preload by tightening tightly with nuts, etc. as in the past, so that it is possible to achieve light weight and compactness and improve the strength and durability of the hub wheel 6, And the amount of preload can be maintained for a long time. Furthermore, it is possible to simplify the incorporation into the vehicle. In addition, the hub ring 6 and the outer joint member 17 are not shown in any other way, but for example, the shaft part 23 of the outer joint member 17 is fitted into the hub wheel 6 and the shaft part 2 3 It is also possible to form a crimped portion by plastically deforming the end portion in the radially outward direction, and to plastically couple the hub wheel 6 and the outer joint member 17 by so-called swing caulking.

 [0040] The upper turning mechanism 4 includes an upper pivot 29 fixed to the vehicle body knuckle 2 via a fixed port 28, and a space between the upper pivot 29 and the cylindrical portion 1a of the wheel knuckle 1. And an upper support bearing 30 attached thereto. The upper rotation mechanism 4 and the lower rotation mechanism 5 described above constitute a kingpin shaft K / S. This kingpin axis K / S is set to tilt at a predetermined angle with respect to the center of the wheel, and the wheel side knuckle 1 can rotate around this kingpin axis K / S with respect to the vehicle body side knuckle 2. It has become.

 [0041] As shown in an enlarged view in FIG. 3, the upper support bearing 30 is fitted into the cylindrical portion 1a of the wheel-side knuckle 1, and has a double row tapered outer rolling surface 3 1 on the inner periphery. a, 3 1 a Outer ring 3 1 formed with a, and this outer ring 3 1 is rotatably inserted into the outer ring 3 1 through double row tapered rollers 3 2 and 3 2 and has a tapered inner rolling surface 3 3 a pair of inner rings 3 3 and 3 3 formed with a, and a back-to-back double row tapered roller set with the small-diameter end faces of the pair of inner rings 3 3 and 3 3 butted together It constitutes a bearing. The outer ring 3 1, the inner ring 3 3 and the tapered roller 3 2 are made of high carbon chrome steel such as S U J 2 and are hardened in the range of 58 to 64 4 H R C to the core part by quenching.

[0042] The double-row tapered rollers 3 2 and 3 2 are held at equal intervals in the circumferential direction via cages 3 4 and 3 4, and the small-diameter side ends of the pair of inner rings 3 3 and 3 3 Part 3 3 b is fitted with an annular connecting ring 35 having a substantially U-shaped cross section, and a pair of inner rings 3 3, 3 3 are connected together. The connecting ring 35 is formed by pressing a steel plate, and the surface is hardened. This connecting ring 3 5 improves the disassembly and assembly of the upper support bearing 30.

 [0043] In addition, seals 3 6 and 3 6 are attached to the opening of the annular space formed between the outer ring 3 1 and the inner ring 3 3, and leakage of the lubricating grease sealed inside the bearing This prevents foreign matter such as rainwater and dust from entering the bearing from the outside.

 Here, in the present embodiment, the double row tapered rollers 3 2 and 3 2 of the upper support bearing 30 are illustrated as being held by the cages 3 4 and 3 4, but this cage 3 4 3 and 4 may be abolished, so-called all-round type. As a result, more tapered rollers 32 can be accommodated in the same space as before, and the upper support bearing 30 can be increased in load capacity and rigidity. On the other hand, even if the size of the tapered roller 3 2 is set to a small size, the load capacity and rigidity can be ensured and space can be saved. Note that this type of support bearing does not rotate like a normal bearing, but only swings, so even a full-roller type has a very low peripheral speed and does not generate heat or noise.

 Furthermore, in this embodiment, as shown in FIGS. 4 (a) and (b), even if the retainer 3 4 is a full-roller type, the conical roller is not used when the upper support bearing 30 is assembled. Solid lubricant 3 7 is filled to prevent the loss of the filter 3 2 and to hold the tapered roller 3 2 stably. As a result, grease can be prevented from being biased, and good, strong, and stable lubricity can be exhibited, and durability of the upper support bearing 30 can be improved.

[0046] This solid lubricant 37 is known under a trade name such as plastic grease, polypropylene, etc., and an ultra-high molecular weight polyethylene having an average molecular weight of about 1 to 5 x 10 ⁶ 9 5 to 1 It consists of 5 wt% and grease 5-9 9 wt% which has a melting point higher than the gelation temperature of the ultra high molecular weight polyethylene (see Japanese Patent Publication No. 6 3-2 3 2 3 9).

[0047] As another example, an ultra-high molecular weight polyethylene having an average molecular weight of about 1 to 5 X 10 ⁶ 95 5 to 1 wt% and a melting point higher than the gelation temperature of the ultra-high molecular weight polyethylene It is also possible to mix the ultra high molecular weight polyethylene powder 95-1 wt% having a particle size of 1-1OOm with 5-99 wt% of grease having a dispersion and hold at a temperature above the gel point. .

 In addition to the solid lubricant 37 described above, a solid lubricant made of a so-called foamed grease made of a solid component made of a foamed resin and a lubricant component made of grease or the like may be used. This foamed grease is composed of foamed resin made of foamed urethane, foamed polyethylene, polyamide resin, or the like filled in the entire bearing space, and grease that has entered the foamed resin bubbles.

 [0049] On the other hand, the lower portion of the wheel side knuckle 1 is rotatably supported by the vehicle body side knuckle 2 via the lower rotation mechanism 5 as shown in an enlarged view in FIG. The lower rotating mechanism 5 includes a lower pivot 2 6 fastened to the vehicle body side knuckle 2 via a fixed port 2 8, and a lower support attached between the lower pivot 2 6 and the wheel side knuckle 1. It consists of bearings 2-7.

 [0050] The lower support bearing 27 is press-fitted into the wheel-side knuckle 1 and formed between the outer ring 3 8 and the lower pivot 2 6 between the outer ring 3 8 and the outer ring 3 8 formed by pressing from a steel plate. The needle roller bearing is provided with a plurality of needle rollers 39 accommodated in the formed annular space. The lower support bearing 27 is a so-called full-roller needle roller bearing with no cage. Note that this type of support bearing does not rotate like ordinary bearings, but only swings. Therefore, even with full-roller types, the peripheral speed is extremely low and no heat or noise is generated. A seal 40 is attached to the open end of the outer ring 38, and the needle roller 39 is sealed with the seal 40 and the outer ring 38 closed on one side.

Here, in the present embodiment, as shown in FIG. 6, the lower support bearing 27 has a solid lubricant 37 to prevent the needle roller 29 from falling off and stably hold it. Filled. As a result, the load capacity and rigidity of the lower support bearing 27 are increased, and even if the rotational axis of the lower support bearing 27 is substantially vertical, the grease is not biased as before, Good and stable lubricity can be exhibited, and the durability of the lower support bearing 27 can be improved. [0052] Further, even if a foreign object enters the lower support bearing 2 7 through the female shaft 2 6a formed on the lower pivot 26 and fixed to the fixed port 28, the solid lubricant 37 Therefore, the intrusion into the bearing can be prevented and the airtightness can be improved, and the lower support bearing 27 can be prevented from being blown and the durability can be further improved.

 Example 1

 FIG. 7 is a longitudinal sectional view showing a second embodiment of the support structure of the suspension device according to the present invention, FIG. 8 is an enlarged view of a main part showing the upper rotation mechanism of FIG. 7, and FIG. FIG. 7 is an enlarged view of a main part showing the lower rotating mechanism in FIG. 7, and FIG. 10 is an explanatory view showing an assembling method of the suspension device according to the present invention. It should be noted that the same part ■ part or part having the same function as the above-described embodiment is given the same reference numeral, and detailed description thereof is omitted.

 This suspension device constitutes a DAS having a two-part structure of a wheel side knuckle 4 1 that receives turning of a wheel (not shown) and a vehicle body side knuckle 4 2 that receives vertical movement of the suspension device. . The wheel-side knuckle 4 1 supports the wheel rotatably via the wheel bearing device 4 3, and extends substantially in the vehicle width direction and is located on the radially outer side of the wheel-side knuckle 41. The side knuckle 4 2 is pivotally connected to the side knuckle 4 2 via upper and lower turning mechanisms 4 4 and 4 5.

 The wheel bearing device 43 has a configuration called a fourth generation in which the hub wheel 6, the double row rolling bearing 46 and the constant velocity universal joint 8 are unitized. The double row rolling bearing 46 includes an outer member 47, an inner member 12, and double row rolling elements 1 3, 1 3. The outer member 47 is fitted into the wheel-side knuckle 41, and double row outer rolling surfaces 11a, 11a are integrally formed on the inner periphery.

[0056] As shown in an enlarged view in FIG. 8, the upper turning mechanism 4 4 includes a pivot 4 9 that is separably fixed to the wheel knuckle 4 1 via a fixing screw 4 8, and the pivot 4 9 And an upper support bearing 50 that is mounted between the bearing hole 4 2 a of the vehicle body knuckle 4 2. The surface of the pivot shaft 4 9 is hardened by heat treatment, and is pressed into the shaft hole 4 1 a of the wheel side knuckle 4 1. An annular groove 49a is formed on the outer periphery, and the annular groove 49a is engaged with a fixing screw 48 to be positioned and fixed in the axial direction. In this embodiment, with such a simple configuration The pivot 4 9 can be positioned and fixed to the wheel side knuckle 4 1 and a working space can be secured, thereby improving workability.

[0057] The upper support bearing 50 is fitted in the bearing hole 4 2a of the vehicle body side knuckle 4 2 and has an outer ring 5 1 formed with a tapered outer raceway surface 5 1 a on the inner periphery, and an outer periphery. An inner ring 5 2 formed with a tapered inner rolling surface 5 2 a opposite to this outer rolling surface 5 1 a and a cage 5 3 between both rolling surfaces 5 1 a and 5 2 a Rolling elements (conical rollers) 5 4 accommodated in a freely rolling manner, and seals 5 5 and 5 6 attached to an opening in an annular space formed between the outer ring 5 1 and the inner ring 5 2 It consists of single row tapered roller bearings.

 [0058] Further, an end cap 57 is attached to the vehicle body side knuckle 42, and the upper opening is closed so that foreign matter such as rainwater or a die does not directly enter the upper support bearing 50. Reference numeral 5 8 denotes a female screw formed on the end surface of the pivot 49, and a jig (not shown) can be fixed to the female screw 58 at the time of disassembly so that the pivot 49 can be easily pulled out.

 Here, the upper support bearing 50 is formed with a large collar 52 b that guides the rolling elements 54 on the larger diameter side of the inner rolling surface 52 a of the inner ring 52. The back side (large diameter side) of the inner ring 52 is in contact with the wheel side knuckle 41, and a preload is applied to the bearing by the weight of the vehicle. As a result, it is possible to provide a rotating mechanism that is free from backlash even if the upper support bearing 50 is a single row, as well as being lightweight and compact.

 [0060] Here, the positioning and fixing of the pivot 49 is performed by engaging the fixing screw 48 with the annular groove 4 9a formed on the outer periphery of the pivot 49. However, the present invention is not limited to this. For example, although not shown, the shaft hole 41 a of the wheel side knuckle 41 may be used as a through hole, and a retaining ring may be attached to the annular groove 49 a of the pivot shaft 49. In addition, although a single row conical roller bearing using a tapered roller as the rolling element 54 is illustrated as the upper support bearing 50, the present invention is not limited to this. For example, a single row anguilla using a pole as the rolling element 54. It may be a ball bearing.

[0061] — On the other hand, the lower rotation mechanism 5 5 has a knuckle on the wheel side as shown in FIG. 4 A pivot 5 9 that is separably fixed to 1 through a fixing screw 4 8, and a lower support bearing 60 that is mounted between the pivot 5 9 and the bearing hole 4 2 b of the vehicle body side knuckle 4 2 and It has. The surface of the pivot shaft 59 is hardened by heat treatment and is press-fitted into the shaft hole 4 1 b of the wheel side knuckle 4 1. An annular groove 59a is formed on the outer circumference, and the annular groove 59a is engaged with a fixing screw 48 to be positioned and fixed in the axial direction. The pivoting shafts 49 and 59 of the lower rotating mechanism 55 and the upper rotating mechanism 54 constitute the kingpin shaft K / S. The kingpin axis K / S is configured to be inclined at a predetermined angle with respect to the wheel center line W / C, and the wheel side knuckle 41 can be rotated around the kingpin axis K / S ( (See Figure 7.)

 [0062] The lower support bearing 60 is fitted in the bearing hole 4 2b of the vehicle body side knuckle 42, and has an outer ring 6 1 formed with an arc-shaped outer raceway 6 1a on the inner periphery, and an outer periphery on the outer ring 61. An inner ring 6 2 formed with an arcuate inner rolling surface 6 2 a facing this outer rolling surface 6 1 a and a cage 6 3 between both rolling surfaces 6 1 a and 6 2 a Rolling body (pole) 6 4 accommodated in a freely rolling manner, and seals 6 5 and 6 5 attached to the opening of the annular space formed between the outer ring 61 and the inner ring 62 It consists of a deep groove ball bearing. The lower support bearing 60 has no internal clearance due to the axial displacement of the upper support bearing 50, and the rolling element 6 4 has an angular contact with both rolling surfaces 6 1 a and 6 2 a with a slight contact angle. To do. As a result, the lower rotating mechanism 55 can be made lighter and more compact, and a rotating mechanism without backlash can be provided even if the lower support bearing 60 is a single row. Note that the internal clearance of the lower support bearing 60 may be set small in advance, and a predetermined preload may be applied by fitting with the shaft 59 and the bearing hole 4 2 b of the vehicle body side knuckle 42.

Next, the assembly method of the suspension device according to the present invention will be described in detail with reference to FIG. 10. First, the wheel bearing device 43 is assembled to the wheel knuckle 41. At this time, if the outer diameter of the outer member 4 7 is set to be larger than the maximum outer diameter of the constant velocity universal joint 8, the hub wheel 6 and the double row rolling bearing 4 6 and the constant velocity universal joint 8 Can be assembled to the wheel side knuckle 4 1 Next, the upper and lower support bearings 50, 60 are mounted on the vehicle body side knuckle 42, and the wheel side knuckle 41 is positioned inside the vehicle body side knuckle 42 and positioned. Then, pivots 4 9 and 5 9 are inserted from the radial outer side of the vehicle body side knuckle 4 2, and these pivots

4 9 and 5 9 are press-fitted into the wheel holes 4 1 a and 4 1 b of the wheel side knuckle 4 1. Finally, the fixing screw 4 8 is fastened to the wheel side knuckle 4 1 to fix the pivot shafts 4 9 and 5 9 to the wheel side knuckle 4 1, and the end cap 5 7 is attached to the vehicle body side knuckle 4 2 for assembly. Complete.

In the present embodiment, the upper support bearing 50 and the lower support bearing 60 are attached to the vehicle body side knuckle 42 via the pivots 49 and 59 fixed to the wheel side knuckle 41. Therefore, the weight of the wheel side knuckle 41 is reduced, the steering force is reduced, the steering performance is improved, and the unit including the upper support bearing 50 and the lower support bearing 60 is obtained by inserting / removing the pivots 49, 59. Because it can be detached, assembly workability is improved.

 Example 3

 FIG. 11 is a longitudinal sectional view showing a third embodiment of the support structure of the suspension device according to the present invention, FIG. 12 is an enlarged view of a main part showing the upper rotation mechanism of FIG. 13 is an enlarged view of the main part showing the lower rotating mechanism of FIG. 11. FIG. 14 is an explanatory view showing the assembly method of the suspension device according to the present invention. FIG. 15 is the wheel side according to the present invention. FIG. 16 is a front view showing the knuckle, and is an enlarged view of a main part of the support structure for the suspension device according to the present invention. It should be noted that the same parts, parts, or parts having the same functions as those in the above-described embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.

[0066] This suspension device comprises a DAS having a two-part structure of a wheel side knuckle 6 6 that receives turning of a wheel (not shown) and a vehicle body side knuckle 6 7 that receives vertical movement of the suspension device. Yes. The wheel-side knuckle 6 6 rotatably supports the wheel via a wheel bearing device 68, and extends substantially in the vehicle width direction and is located on the radially outer side of the wheel-side knuckle 66. It is rotatably connected to the vehicle body side knuckle 6 7 via upper and lower rotating mechanisms 6 9, 70. [0067] The wheel bearing device 68 has a configuration called a fourth generation in which the hub wheel 71, the double row rolling bearing 72, and the constant velocity self-joint 8 are unitized. The hub wheel 7 1 integrally has a wheel mounting flange 9 for mounting a wheel at an end portion on the outer side, and a hub port 9a is planted at a circumferentially equidistant position.

 The double row rolling bearing 7 2 includes an outer member 7 3, an inner member 7 4, and double row rolling elements 1 3 and 1 3. The outer member 73 is fitted into the wheel-side knuckle 66, and double row outer rolling surfaces 11a, 11a are formed on the inner periphery.

 [0069] —The inner member 74 refers to the hub wheel 7 1 and an outer joint member 17 to be described later fitted into the small-diameter step portion 6b of the hub wheel 71. Double-row outer raceway 1 1 a, 1 1 a One (outer side) inner raceway 6 a on the outer circumference of hub wheel 7 1 and the other (inner one side) inner raceway 1 7 a is formed on the outer periphery of the outer joint member 17.

 [0070] The hub wheel 7 1 is formed of medium and high carbon steel containing carbon 0.40 to 0.80 wt% such as S 5 3 C, and extends from the inner rolling surface 6 a to the small diameter step portion 6 b. The surface is hardened by induction hardening in the range of 58 to 64 HRC.

 [0071] The hub wheel 7 1 and the outer joint member 17 are fixed by plastic bonding. In other words, the shaft portion 2 3 of the outer joint member 1 7 is fitted into the hub wheel 71, and a fitting member 2 3 b is inserted by pushing a diameter expanding jig such as a mandrel into the hollow shaft portion 23. , The fitting portion 2 3 b bites into the concave and convex portion 10 of the hub wheel 71 and caulked, and the hub wheel 7 1 and the outer joint member 17 are integrally plastically coupled. This eliminates the need to control the preload by tightening tightly with a nut or the like as in the past, so it is possible to reduce the weight and make it compact, and improve the strength and durability of the hub wheel 71. In addition, the preload amount can be maintained for a long time. Furthermore, it has the feature that it can be easily incorporated into a vehicle.

[0072] As shown in an enlarged view in Fig. 12, the upper rotation mechanism 6 9 includes a pivot 7 6 fixed to the vehicle body side knuckle 6 7 through a sleeve 7 5 in a separable manner, and the pivot 7 6 And an upper support bearing 50 mounted between the wheel-side knuckle 66 and the tubular portion 6 6a. The sleeve 7 5 is formed by pressing from a steel plate. It has a flange 7 5 a at the end. The sleeve 7 5 is hardened by heat treatment on the surface to improve wear resistance due to contact with the pivot 7 6, and press-fitted into the vehicle body side knuckle 6 7 to press the vehicle body side knuckle 6 7. The rigidity of can be increased. The pivot 7 6 has a flange portion 7 6 a at one end, is positioned on the vehicle body side knuckle 6 7 by this flange portion 7 6 a, and is fixed in the axial direction by a retaining ring 7 7. .

[0073] The upper support bearing 50 is fitted into the cylindrical portion 66a of the wheel side knuckle 66, and an outer ring 51 having a tapered outer rolling surface 51a on the inner periphery, Rollable freely via inner ring 5 2 formed on the outer periphery of inner rolling surface 5 2 a opposite to rolling surface 5 1 a, and cage 5 3 between both rolling surfaces 5 1 a and 5 2 a And a single-row tapered roller bearing with tapered rollers 5 4 accommodated in the housing. The upper support bearing 50 has an inner ring 52 with a waterproof cover 7 8 on the back side (large diameter side) of the inner ring 52 and a flange 7 7

5 A abuts against a and preload is applied to the bearing by the weight of the vehicle. This makes it possible to reduce the weight and compactness of the upper rotating mechanism 69 and provide a rotating mechanism that does not play even if the upper support bearing 50 is a single row. .

 [0074] A female screw 7 6 b is formed at the end of the pivot 7 6, and a stopper plug 7 9 is attached to the female screw 7 6 b to prevent the female screw 7 6 b from starting, and the female screw 7 6 By screwing a disassembly jig (not shown) into 6 b, the pivot 76 can be easily detached radially outward from the vehicle body side knuckle 6 7.

 [0075] —On the other hand, as shown in FIG. 13 in an enlarged manner, the lower rotation mechanism 70 has a pivot 7 6 fixed to the vehicle body side knuckle 6 7 through a sleeve 7 5 in a separable manner. Lower support bearing mounted between the pivot 7 6 and the cylindrical part 6 6 b of the wheel side knuckle 6 6

6 and 0. The pivot shafts 7 6 and 76 of the lower rotation mechanism 70 and the upper rotation mechanism 69 constitute a kingpin shaft K / S. This kingpin axis K / S is inclined at a predetermined angle with respect to the center W / C of the wheel, and the wheel side knuckle 66 can be rotated around the kingpin axis K / S (see FIG. 1 See 1). [0076] The lower support bearing 60 is fitted into the cylindrical portion 6 6b of the wheel side knuckle 6 6 and an outer ring 61 having an arc-shaped outer raceway surface 61a formed on the inner periphery, Rolling surface 6 1 a Rollable on inner ring 6 2 a facing the outer ring 6 2 a on the outer periphery 6 2 and between both rolling surfaces 6 1 a and 6 2 a via cage 6 3 It consists of a deep groove ball bearing with poles 6 and 4 housed in it. The lower support bearing 60 has no internal clearance due to the axial displacement of the upper support bearing 50, and the pole 64 is in angular contact with both rolling surfaces 61 a and 62 a with a slight contact angle. As a result, the lower rotating mechanism 70 can be made lighter and more compact, and even if the lower support bearing 60 is a single row, a rotating mechanism without backlash can be provided. Note that the internal clearance of the lower support bearing 60 may be set small in advance, and a predetermined preload may be applied by fitting with the cylindrical portion 6 6 b of the pivot 76 and the wheel side knuckle 66.

 Next, the assembly method of the present suspension device will be described in detail with reference to FIG.

 First, the upper and lower support bearings 50, 60 are attached to the wheel side knuckle 66, and the wheel bearing device 68 is assembled to the wheel side knuckle 66. At this time, the inner diameter D 1 of the wheel side knuckle 6 6 is larger than the maximum outer diameter D 2 of the constant velocity universal joint 8 (here, the maximum outer diameter of the boot 24) (D 1> D 2). In this way, it is possible to assemble the wheel knuckle 6 6 with the hub wheel 7 1, the double row rolling bearing 7 2, and the constant velocity universal joint 8 being unitized. Next, the sleeve 75 is press-fitted and fixed to the vehicle body side knuckle 6 7, and the vehicle body side knuckle 6 7 is externally attached to the wheel side knuckle 6 6. Then, with the wheel side knuckle 6 6 and the vehicle body side knuckle 6 7 aligned, the pivots 7 6, 7 6 are inserted into the vehicle body side knuckle 6 7 from the outside in the radial direction, and the pivots 7 6, 7 6 The upper and lower support bearings 5 0 and 6 0 are fixed to the base plate. Finally, the retaining rings 7 7 and 7 7 are attached to the vehicle body knuckle 6 7 to fix the pivot shafts 7 6 and 7 6 to the vehicle body knuckle 6 7.

[0078] In the present embodiment, since each part can be detached from the radially outer side of the wheel side knuckle 6 6 and the vehicle body side knuckle 6 7, the assembling work can be secured and the assembling work can be simplified. Both pivots 7 6, mounted on the side knuckle 6 7 It is possible to remove the wheel side knuckle 6 6 from the vehicle body side knuckle 6 7 simply by removing 7 6, and the disassembly and assembly work of the wheel bearing device 6 8 and constant velocity universal joint 8 is improved.

 Here, in this embodiment, as shown in FIG. 15, a recess 80 is formed at one place on the outer side end face of the wheel side knuckle 66 corresponding to the position of the hub port 9a. . As a result, as shown in Fig. 16, the hub port 9a does not interfere with the wheel knuckle 6 6 during repair, and the hub port 9a is removed from the wheel mounting flange 9 and replaced with a new hub port 9a. Therefore, it is possible to provide a support structure for a suspension system that can be easily performed and has improved workability. Preferably, by providing the recess 80 near the center avoiding the vertical direction of the vertical line with respect to the road surface, the vehicle is loaded on the wheel bearing device 6 8 via the wheel mounting flange 9 when the vehicle turns. Even for the moment load, the strength of the wheel side knuckle 6 6 ■ Sufficient durability can be ensured without lowering the rigidity.

 [0080] 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 within the scope not departing from the gist of the present invention. Of course, the present invention can be implemented in various forms, and 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, Includes all changes.

 Industrial applicability

 [0081] The support structure of the suspension device according to the present invention includes a two-part structure in which a knuckle constituting the suspension device has a vehicle body side knuckle that receives the vertical movement of the suspension device and a wheel side nut that receives the turning of the wheel. Applicable to DAS consisting of

 Brief Description of Drawings

 FIG. 1 is a longitudinal sectional view showing a first embodiment of a support structure for a suspension device according to the present invention.

 2 is a longitudinal sectional view showing the wheel bearing device of FIG. 1. FIG.

FIG. 3 is a longitudinal sectional view showing the upper support bearing of FIG. 1. FIG. 4 (a) is a longitudinal sectional view showing an inner ring and a rolling element subassembly constituting the upper support bearing of FIG. (B) is an arrow view along line IV-IV in (a).

 5 is a longitudinal sectional view showing the lower rotation mechanism of FIG.

6 is a cross-sectional view taken along the line V I -V I in FIG.

 FIG. 7 is a longitudinal sectional view showing a second embodiment of the suspension support structure according to the present invention.

 8 is an enlarged view of a main part showing the upper rotation mechanism of FIG.

 FIG. 9 is an enlarged view of a main part showing the lower rotation mechanism of FIG.

 FIG. 10 is an explanatory view showing a method for assembling a suspension device according to the present invention.

 FIG. 11 is a longitudinal sectional view showing a third embodiment of the suspension support structure according to the present invention.

CO

 FIG. 12 is an enlarged view of the main part showing the upper rotation mechanism of FIG.

 FIG. 13 is an enlarged view of the main part showing the lower rotation mechanism of FIG.

 FIG. 14 is an explanatory view showing a method for assembling a suspension device according to the present invention.

 FIG. 15 is a front view showing the wheel-side knuckle shown in FIG.

 FIG. 16 is an enlarged view of a main part of the support structure for the suspension device shown in FIG.

 FIG. 17 is a schematic diagram showing a conventional suspension device.

 FIG. 18 is a longitudinal sectional view showing a conventional support structure for a suspension device.

Explanation of symbols

1, 4 1, 66 Wheel knuckle

 1 a, 4 1 a, 66 a Tube

 2, 42, 67 Vehicle side knuckle

 3, 43, 68 Wheel bearing device

 4, 44, 69 Upper rotation mechanism

 5, 45, 70 Lower rotation mechanism

 6, 7 1 Hub wheel

6 a, 1 7 a, 33 a, 52 a, 62 a-■ ■ ■ Inner rolling surface b, 2 3 aSmall diameter step

, 4 6, 7 2 ■ ■ ■ Double-row rolling bearings

• Constant velocity universal joint

■ Wheel mounting flange

■ Hub Port

0 ■ ■ ■ ■ ■ Concavity and convexity

 1, Tofu, 7 3 ■ • Outer member

 1 a, 3 1 a, 5 1 aOuter rolling surface

2, 7 4 ■ • Inner member

 3, 5 4, 6 4 ■ ■ Early E motion

 4, 3 4, 5 3, 6 3

 5, 1 6, 3 6, 4 0, 5 5, 5 6, 6 5-■ Seal

 7 ■ ■ ■ ■ • Outer joint member

8 ■ ■ ■ ■ • Fitting inner ring

 9 ■ ■ ■ ■ ■ Cage

 0 ■ ■ ■ ■ ■ Torque transmission pole

1 ■ ■ ■ ■ ■ Mouse

 2 ■ ■ ■ ■ • Shoulder

 3 ■ ■ ■ ■ • Shaft

 3 b ■ ■ ■ • Fitting

 4 ■ ■ ■ ■ ■ Boots

 5, 5 7 ■ ■ End cap

6, 5 9 ■ Lower pivot

 7, 6 0 ■ Lower support bearing

8 ■ ■ ■ ■ ■ Fixed Port

9, 4 9 ■ • Upper pivot

 0, 5 0 ■ • Upper support bearing

1, 3 8, 5 1, 6 1Outer ring Tapered roller

52, 62 Inner ring

b Small diameter end

 Connecting ring

 Solid lubricant needle roller

a, 4 1 b Shaft

a, 42 b Bearing hole

 Fixing screw

a, 59 a annular groove

 sleeve

a Franci

 pivot

a buttock

b Female thread

 Retaining ring

 Waterproof cover stopcock

 Recess

1 Knuckle

1 a Body side knuckle 1 b Wheel side knuckle 2 Wheel

3 Lower link

4 Shock absorber 5 Wheel bearing

6 Upper rotation mechanism 7 Fixed port Upper pivot

Buttock

Upper support bearing

Outer ring

Tapered roller

Inner ring

Lid member

Lower rotation mechanism

Lower pivot

Lower support bearing

Kingpin shaft

Hub

Constant velocity universal joint

 Drive shaft Inner diameter of wheel side knuckle Maximum outer diameter of constant velocity universal joint King pin shaft

Wheel centerline

Claims

The scope of the claims  [1] It has a two-part structure consisting of a wheel side knuckle that handles the turning of the wheel and a vehicle body side knuckle that receives the vertical movement of the suspension system. And a suspension structure supporting structure connected to the vehicle body side knuckle extending substantially in the vehicle width direction through an upper and lower rotating mechanism,  An upper pivot that is separably coupled to the vehicle body side knuckle via a fixed port;  An upper support bearing mounted between the upper pivot and the wheel knuckle;  The upper support bearing is fitted into the cylindrical portion of the wheel-side knuckle, and an outer ring having a te //-shaped double-row outer raceway formed on the inner periphery;  A pair of inner rings formed on the outer periphery with a te / shaped inner rolling surface facing the outer rolling surfaces of these double rows;  A suspension system comprising a back-fitting type full-roller double-row tapered roller bearing having a double-row tapered roller that is rotatably accommodated between the rolling surfaces. Support structure.  [2] The suspension support structure according to claim 1, wherein the upper support bearing is filled with a solid lubricant.  [3] The lower rotating mechanism includes a lower pivot that is separably coupled to the vehicle body side knuckle via a fixed port, and a lower support bearing that is mounted between the lower pivot and the wheel side knuckle. The suspension support structure according to claim 1 or 2, wherein the lower support bearing is constituted by a full roller needle roller bearing, and the lower support bearing is filled with a solid lubricant. [4] Grease having an average molecular weight of about 1 to 5 × 10 ⁶ ultrahigh molecular weight polyethylene 95-1 wt% and a melting point higher than the gelation temperature of the ultrahigh molecular weight polyethylene 5-9 The support structure for a suspension device according to any one of claims 1 to 3, wherein the support structure has 9 wt%. 5. The suspension support structure according to any one of claims 1 to 3, wherein the solid lubricant is composed of a solid component made of foamed resin and a lubricant component made of grease. 6. The suspension device according to any one of claims 1 to 5, wherein an annular connecting ring having a substantially U-shaped cross section is attached to a small diameter side end portion of the pair of inner rings by pressing a steel plate. Support structure. [7] The wheel bearing device has a fourth generation structure in which a hub wheel, a double row rolling bearing and a constant velocity universal joint are unitized.  An outer member integrally having a vehicle body mounting flange attached to the wheel side knuckle on the outer periphery, and having a double row outer rolling surface formed on the inner periphery;  -A wheel mounting flange for mounting the wheel at the end is integrally formed, one inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and a cylinder extending in the axial direction from the inner rolling surface A hub ring having a small step portion having a circular shape and a hollow shaft portion fitted inside the hub ring, and the other inner rolling facing the outer rolling surface of the double row on the outer periphery. An inner member made of an outer joint member of the constant velocity universal joint formed with a surface;  The inner member and a double row rolling element accommodated between the rolling surfaces of the outer member so as to roll freely,  The suspension support structure according to any one of claims 1 to 6, wherein the hub wheel and the outer joint member are integrally plastically coupled. [8] It has a two-part structure consisting of a wheel-side knuckle that handles the turning of the wheel and a vehicle body-side knuckle that handles the vertical movement of the suspension system. And a suspension structure supporting structure connected to the vehicle body side knuckle extending substantially in the vehicle width direction through an upper and lower rotating mechanism, A shaft hole is formed in the wheel side knuckle, and a pivot shaft is separably fixed to the shaft hole. A bearing hole is formed in the vehicle body side knuckle, and upper and lower supports are provided between the bearing hole and the pivot shaft. Suspension support structure, characterized in that each bearing is mounted. 9. The suspension support structure according to claim 8, wherein the upper support bearing is constituted by a single-row tapered roller bearing or an anguillare ball bearing.  The suspension support structure according to claim 8 or 9, wherein the lower support bearing is a single row deep groove ball bearing.  An annular groove is formed on the outer periphery of the pivot, and a fixing screw is fastened by projecting into the shaft hole of the wheel side knuckle, and the pivot is positioned and fixed in the axial direction by engaging the fixing screw with the annular groove. The suspension support structure according to any one of claims 8 to 10.  The wheel bearing device is constituted by unitizing a hub wheel, a double row rolling bearing and a constant velocity universal joint,  The double row rolling bearing includes an outer member integrally formed with an outer circumferential surface of the double row on an inner periphery;  -A hub wheel integrally having a wheel mounting flange for mounting a wheel at an end, and an inner rolling surface facing one of the outer rolling surfaces of the double row on the outer periphery, and the hub wheel An inner member made of an outer joint member of the constant velocity universal joint, which is fitted inside and has an inner rolling surface facing the other of the outer rolling surfaces of the double row on the outer periphery;  The inner member and a double row rolling element accommodated between the rolling surfaces of the outer member so as to roll freely,  The suspension support structure according to any one of claims 8 to 11, wherein an inner diameter of the wheel side knuckle is set to be larger than a maximum outer diameter of the constant velocity universal joint.  The outer member of the wheel bearing device is press-fitted and fixed to the wheel-side knuckle, and a recess is formed at one position on the outer side end surface of the wheel-side knuckle at a position corresponding to the hub port. Item 8. The suspension support structure according to any one of Items 8 to 12.  14. The suspension support structure according to claim 13, wherein the recess is formed near a center avoiding a vertical direction of a vertical line with respect to a road surface.