JP2018039428A - Bearing device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing device for a vehicle which can correspond to one specification mode by assembling one side and the other side in a forward direction and can correspond to the other specification mode by assembling one side and the other side in a reverse direction, and consequently to provide the bearing device for the vehicle for which a cost reduction can be realized by standardization of components.SOLUTION: In a bearing device 1 for a vehicle, one side pilot part 2h and the other side pilot part 4h, and one side flange part 2i and the other side flange part 4i are so made as to be a shape having compatibility for a vehicle body (knuckle 12) and a wheel (wheel 13). In the case that the bearing device is fitted to the vehicle body by use of the one side pilot part 2h and the one side flange part 2i, the wheel is fitted to the other side pilot part 4h and the other side flange part 4i. In the case that the bearing device is fitted to the vehicle body by use of the other side pilot part 4h and the other side flange part 4i, the wheel is fitted to the one side pilot part 2h and the one side flange part 2i.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a wheel bearing device.

  2. Description of the Related Art Conventionally, a wheel bearing device that supports a wheel rotatably is known (see Patent Document 1). In such a wheel bearing device, an outer member is fixed to a knuckle constituting the vehicle body. In the wheel bearing device, an inner member is disposed inside the outer member, and a rolling element is interposed between the outer member and the inner member. In this way, the wheel bearing device constitutes a rolling bearing structure, and the wheel attached to the inner member is rotatable.

  Here, when one side in the axial direction in the wheel bearing device is defined as “one side”, a pilot part (hereinafter referred to as “one side pilot part”) is provided at one side end of the outer member. Yes. Further, a flange portion (hereinafter referred to as “one-side flange portion”) that extends outward in the circumferential direction is provided at the base end portion of the one-side pilot portion. Therefore, the wheel bearing device is attached via a bolt with the one-side pilot portion fitted into the hole portion of the vehicle body (knuckle) and the one-side flange portion brought into contact with the side surface portion of the vehicle body (knuckle). It is done.

  On the other hand, if the other side in the axial direction in the wheel bearing device is defined as “other side”, a pilot part (hereinafter referred to as “other side pilot part”) is provided at the other side end of the inner member. Yes. Further, a flange portion (hereinafter referred to as “other side flange portion”) is provided at the base end portion of the other side pilot portion so as to spread outward in the circumferential direction. Therefore, the wheel bearing device is attached via a bolt with the other side pilot part fitted into the hole part of the wheel (wheel) and the other side flange part in contact with the side part of the wheel (wheel). It is done. In other words, the wheel is attached via the bolt in a state where the hole portion of the wheel (wheel) is fitted to the other side pilot portion and the side surface portion of the wheel (wheel) is in contact with the other side flange portion.

  By the way, the wheel bearing device has different specification requirements for each vehicle type with respect to the shape of each pilot part and each flange part. More specifically, the specification requirements differ between the wheel bearing device used for the front wheel and the wheel bearing device used for the rear wheel. In addition, the specification requirements are different between the wheel bearing device used for the driven wheel and the wheel bearing device used for the drive wheel. For this reason, the wheel bearing device has to be designed differently for each vehicle type, for the front wheel, for the rear wheel, for the driven wheel, and for the driving wheel, although having the same structure. Accordingly, there has been a demand for a wheel bearing device that can cope with one specification mode by assembling one side and the other side in the forward direction, and can accommodate other specification modes by assembling the one side and the other side in the reverse direction. . As a result, there has been a demand for a wheel bearing device that can realize cost reduction by sharing parts.

JP 2010-089664 A

  Provided is a wheel bearing device that can accommodate one specification mode by assembling one side and the other side in the forward direction, and that can correspond to another specification mode by assembling the one side and the other side in the reverse direction. As a result, the wheel bearing apparatus which can implement | achieve cost reduction by sharing parts is provided.

The first invention is
An outer member having a double row outer raceway formed on the inner periphery;
A hub wheel having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub wheel, and a plurality of outer rings facing the double-row outer rolling surface on the outer periphery. An inner member in which the inner rolling surface of the row is formed;
In the wheel bearing device comprising: a double row rolling element that is interposed between the rolling surfaces of the outer member and the inner member so as to freely roll.
A one-side pilot portion at one end of the outer member;
A one-side flange portion extending from the base end portion of the one-side pilot portion to the outer side in the circumferential direction is provided,
The other side pilot part at the other side end of the inner member,
The other side flange portion extending from the base end portion of the other side pilot portion to the outer side in the circumferential direction is provided,
The one-side pilot part and the other-side pilot part and the one-side flange part and the other-side flange part are shaped to have compatibility with the vehicle body and the wheel,
When attached to the vehicle body using the one side pilot part and the one side flange part, the wheel is attached to the other side pilot part and the other side flange part,
When attached to the vehicle body using the other side pilot part and the other side flange part, the wheel is attached to the one side pilot part and the one side flange part.

2nd invention is the wheel bearing apparatus which concerns on 1st invention,
When used as a front wheel and a driven wheel, the one side pilot part and the one side flange part are used to attach to the vehicle body, and the other side pilot part and the other side flange part are attached to the front wheel. It is.

3rd invention is the bearing apparatus for wheels which concerns on 1st invention,
When used as a rear wheel and a driven wheel, it is attached to the vehicle body using the other side pilot part and the other side flange part, and the rear wheel is attached to the one side pilot part and the one side flange part. , That is.

4th invention is the wheel bearing apparatus which concerns on 1st invention,
When used for front wheels and drive wheels or rear wheels and drive wheels, it is attached to the vehicle body using one side pilot part and one side flange part, and wheels are attached to the other side pilot part and the other side flange part. ,
Furthermore, the hole centering on the rotating shaft of the inner member is formed in the inner member,
The drive shaft can be press-fitted into the inner member.

The fifth invention is the wheel bearing device according to the first invention,
It has a substantially annular magnetic encoder,
When attached to a vehicle body using the one side pilot part and the one side flange part, the magnetic encoder is fitted to the outer periphery of the inner member.

A sixth invention is the wheel bearing device according to the first invention,
It has a substantially annular magnetic encoder,
When attached to the vehicle body using the other side pilot part and the other side flange part, the magnetic encoder is fitted to the outer periphery of the outer member.

  As effects of the present invention, the following effects can be obtained.

  The wheel bearing device according to the present invention is provided with a one-side pilot portion at one end portion of the outer member and a one-side flange portion that spreads outward in the circumferential direction from the base end portion of the one-side pilot portion. . Moreover, the other side pilot part and the other side flange part which spreads in the circumferential direction outer side from the base end part of the other side pilot part are provided in the other side edge part of the inner member. Further, the one-side pilot part, the other-side pilot part, and the one-side flange part and the other-side flange part have a shape that is compatible with the vehicle body and the wheel. And when it is attached to the vehicle body using the one side pilot part and the one side flange part, the wheel is attached to the other side pilot part and the other side flange part, and it is attached to the car body using the other side pilot part and the other side flange part. When attached, a wheel is attached to the one side pilot part and the one side flange part. According to such a wheel bearing device, one specification mode can be handled by assembling one side and the other side in the forward direction, and another specification mode can be handled by assembling one side and the other side in the reverse direction. As a result, cost reduction can be realized by sharing parts.

  In the wheel bearing device according to the present invention, when used as a front wheel and a driven wheel, the front wheel is attached to the vehicle body using the one side pilot part and the one side flange part, and the front wheel is attached to the other side pilot part and the other side flange part. It is attached. According to such a wheel bearing device, the structure has an appropriate rigidity for supporting the front wheel. As a result, it can contribute to realization of an appropriate turning characteristic.

  In the wheel bearing device according to the present invention, when used for a rear wheel and a driven wheel, the other side pilot part and the other side flange part are attached to the vehicle body, and the one side pilot part and the one side flange part are attached to the rear side. A wheel is attached. According to such a wheel bearing device, the structure has an appropriate rigidity as a structure that supports the rear wheel. As a result, it can contribute to realization of an appropriate turning characteristic.

  In the wheel bearing device according to the present invention, when used for front wheels and drive wheels, or rear wheels and drive wheels, the one-side pilot portion and the one-side flange portion are attached to the vehicle body, and the other-side pilot portion And the front wheel is attached to the other flange part. Further, a hole is formed in the inner member around the rotation axis of the inner member. The drive shaft can be press-fitted into the inner member. According to such a wheel bearing device, it can be used for a driven shaft or a drive shaft.

  The wheel bearing device according to the present invention includes a substantially annular magnetic encoder. And when attaching to a vehicle body using a 1 side pilot part and a 1 side flange part, a magnetic encoder is fitted by the outer periphery of an inward member. According to such a wheel bearing device, the rotational speed of the wheel can be detected even in a predetermined usage mode.

  The wheel bearing device according to the present invention includes a substantially annular magnetic encoder. And when attaching to a vehicle body using an other side pilot part and an other side flange part, a magnetic encoder is fitted by the outer periphery of an outward member. According to such a wheel bearing device, the rotational speed of the wheel can be detected even in a predetermined usage mode.

The perspective view which shows the whole structure of the wheel bearing apparatus. Sectional drawing which shows the whole structure of the wheel bearing apparatus. The expanded sectional view which shows the partial structure of the wheel bearing apparatus. The expanded sectional view which shows the partial structure of the wheel bearing apparatus. The side view which shows a 1 side pilot part and a 1 side flange part. The side view which shows an other side pilot part and an other side flange part. Sectional drawing which shows the 1st usage condition of the bearing apparatus for wheels. Sectional drawing which shows the 2nd usage condition of the bearing apparatus for wheels. Sectional drawing which shows the 3rd usage condition of the bearing apparatus for wheels. The expanded sectional view which shows the ring member which concerns on other embodiment. The expanded sectional view which shows the one side pilot part which concerns on other embodiment. The expanded sectional view which shows the other side pilot part which concerns on other embodiment. The side view which shows the one side flange part which concerns on other embodiment. The side view which shows the other side flange part which concerns on other embodiment.

  Below, the wheel bearing apparatus 1 which concerns on this invention is demonstrated using FIGS. 1-4. 2 is a cross-sectional view taken along the line AA in FIG. 3 and 4 are enlarged views of a partial region in FIG.

  The wheel bearing device 1 supports a wheel rotatably (see FIGS. 7 to 9). The wheel bearing device 1 includes an outer member 2, an inner member 3 (hub wheel 4 and inner ring 5), a rolling element 6, a ring member 7, and a seal member 8.

  The outer member 2 constitutes the outer ring portion of the rolling bearing structure. The outer member 2 is made of a medium-high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C formed in a substantially cylindrical shape. An enlarged diameter portion 2 a is formed on the inner periphery at one end portion of the outer member 2. Further, an enlarged diameter portion 2b is formed on the inner periphery at the other end portion of the outer member 2. Furthermore, between the enlarged diameter portion 2a and the enlarged diameter portion 2b, an outer rolling surface 2c and an outer rolling surface 2d are formed in an annular shape so as to be parallel to each other. In addition, the outer rolling surface 2c and the outer rolling surface 2d are subjected to induction hardening and cured so that the surface hardness is in the range of 58 to 64 HRC.

  The inner member 3 constitutes an inner ring portion of the rolling bearing structure. The inner member 3 includes a hub ring 4 and an inner ring 5.

  The hub wheel 4 is made of medium-high carbon steel containing carbon of 0.40 to 0.80 wt% such as S53C formed in a substantially cylindrical shape. A small diameter step 4 a is formed at one end of the hub wheel 4. The small diameter step portion 4a is formed with a caulking portion 4b of the inner ring 5 by bending its end portion radially outward. An opening 4 c is formed at the other end of the hub wheel 4. Furthermore, an annular inner rolling surface 4 d is formed on the outer periphery of the hub wheel 4. The inner rolling surface 4 d faces the outer rolling surface 2 d of the outer member 2. The hub wheel 4 is induction hardened from the small-diameter step portion 4a to the seal land portion (consisting of a shaft surface portion 4e, a curved surface portion 4f, and a side surface portion 4g, which will be described later) through the inner rolling surface 4d. Is cured so as to be in the range of 58 to 64 HRC.

  The inner ring 5 is made of a high carbon chrome bearing steel such as SUJ2 formed in a substantially cylindrical shape. On the outer periphery of the inner ring 5, an inner rolling surface 5a is formed in an annular shape. The inner rolling surface 5 a faces the outer rolling surface 2 c of the outer member 2. In addition, the inner ring 5 is subjected to so-called quenching and is cured so as to be in the range of 58 to 64 HRC up to the core.

  The rolling element 6 constitutes a rolling part of the rolling bearing structure. The rolling element 6 has a ball row 6a on one side and a ball row 6b on the other side. The ball row 6a and the ball row 6b are made of high carbon chrome bearing steel such as SUJ2. In the ball row 6a, a plurality of balls are held in a ring shape by a cage. The ball row 6a is accommodated in a freely rollable manner between an inner rolling surface 5a formed on the inner ring 5 and an outer rolling surface 2c of the outer member 2 facing the inner rolling surface 5a. On the other hand, in the ball row 6b, a plurality of balls are held in a ring shape by a cage. The ball row 6b is accommodated between the inner rolling surface 4d formed on the hub wheel 4 and the outer rolling surface 2d of the outer member 2 opposite to the inner rolling surface 4d. Note that the ball row 6a and the ball row 6b are subjected to so-called quenching and are hardened so that the core portion is in a range of 58 to 64 HRC.

  The ring member 7 is attached to one end portion of the annular space S formed between the outer member 2 and the inner member 3. The ring member 7 is made of a ferritic stainless steel plate (JIS standard SUS430 or the like), an austenitic stainless steel plate (JIS standard SUS304 or the like), or a rust-proof cold-rolled steel plate (JIS standard SPCC system or the like). It is configured. The ring member 7 is formed by bending an annular steel plate by press working and has an approximately L-shaped axial cross section. That is, the ring member 7 is formed with a cylindrical fitting portion 7a and a disk-shaped side plate portion 7b extending from one end thereof toward the inner member 3 (inner ring 5). The fitting part 7 a and the side plate part 7 b intersect each other vertically, and the fitting part 7 a is fitted along the enlarged diameter part 2 a of the outer member 2. Further, the side plate part 7 b extends toward the inner member 3 (inner ring 5), and the tip thereof is close to the outer peripheral surface of the inner ring 5. Thereby, the ring member 7 suppresses the flow of grease from the annular space S side to the one side.

  The seal member 8 is attached to the other end portion of the annular space S formed between the outer member 2 and the inner member 3. The seal member 8 includes a core metal 9 and a seal rubber 10.

  The core 9 is made of a ferritic stainless steel plate (JIS standard SUS430 or the like), an austenitic stainless steel plate (JIS standard SUS304 or the like), or a rust-proof cold-rolled steel plate (JIS standard SPCC system or the like). It is configured. The cored bar 9 is formed by bending an annular steel plate by press work, and the cross section in the axial direction is substantially C-shaped. That is, the cored bar 9 is formed with a cylindrical fitting portion 9a and a disc-shaped side plate portion 9b extending from one end thereof toward the inner member 3 (hub wheel 4). The fitting portion 9 a and the side plate portion 9 b intersect with each other while being curved, and the fitting portion 9 a is fitted along the enlarged diameter portion 2 b of the outer member 2. Further, the side plate portion 9 b extends toward the inner member 3 (hub wheel 4), and the tip thereof is close to the shaft surface portion 4 e of the hub wheel 4.

  Seal rubber 10 is NBR (acrylonitrile-butadiene rubber), HNBR (hydrogenated acrylonitrile-butadiene rubber) excellent in heat resistance, EPDM (ethylene propylene rubber), ACM (polyacrylic rubber) excellent in heat resistance and chemical resistance, It is made of synthetic rubber such as FKM (fluoro rubber) or silicon rubber. The seal rubber 10 is formed with a radial lip 10a, an inner axial lip 10b, and an outer axial lip 10c which are seal lips. Further, an edge seal portion 10d is formed on the seal rubber 10 so as to be in contact with the inner periphery of the enlarged diameter portion 2b.

  As described above, the seal member 8 includes the metal core 9 and the seal rubber 10, and the seal rubber 10 has three seal lips. The radial lip 10a contacts the shaft surface portion 4e of the hub wheel 4 through an oil film. The axial lip 10b contacts the curved surface portion 4f of the hub wheel 4 through the oil film. And the outer axial lip 10c contacts the side part (side face of the other side flange part 4i mentioned later) 4g of the hub ring 4 via an oil film. Thereby, the sealing member 8 prevents intrusion of dust and the like and leakage of grease. The edge seal portion 10d is formed so that water does not enter the fitting portion between the outer member 2 and the core metal 9 and corrode.

  Furthermore, the wheel bearing device 1 includes a cap member 11.

  The cap member 11 is attached to the opening end on one side of the outer member 2. The cap member 11 is a ferritic stainless steel plate (JIS standard SUS430 series, etc.), an austenitic stainless steel plate (JIS standard SUS304 series, etc.), or a rust-proof cold rolled steel plate (JIS standard SPCC system, etc.). It is configured. As for the cap member 11, a disk-shaped steel plate is bent by press work, and the outer edge part is turned up. That is, the cap member 11 is formed with a cylindrical fitting portion 11a and a disc-like lid plate portion 11b extending inward from one end thereof. The fitting portion 11a and the cover plate portion 11b intersect each other vertically, and the fitting portion 11a is fitted along the enlarged diameter portion 2a of the outer member 2. Further, the cover plate portion 11b completely seals the opening end portion on one side of the outer member 2. Furthermore, the edge seal part 11c is provided in the outer periphery of the fitting part 11a so that the inner periphery of the enlarged diameter part 2a may be contact | connected. This is to prevent water from entering the fitting portion between the outer member 2 and the cap member 11 and corrosion.

  Next, characteristic points of the wheel bearing device 1 will be described with reference to FIGS. 5 and 6. FIG. 5 is a view seen from the arrow B in FIG. 6 is a diagram viewed from the arrow C in FIG.

  The wheel bearing device 1 is provided with a one-side pilot portion 2 h at one end portion of the outer member 2. The one-side pilot portion 2h has a substantially cylindrical shape centered on the rotation axis L of the inner member 3, and a predetermined uneven shape is formed on the outer peripheral surface of the one-side pilot portion 2h (FIG. 11). reference). The diameter of the one-side pilot portion 2h and the uneven shape of the outer peripheral surface are assumed to be equal to the diameter of the other pilot portion 4h and the uneven shape of the outer peripheral surface described later. This is because the one-side pilot portion 2h and the other-side pilot portion 4h are compatible with the vehicle body and the wheels.

  Further, the outer member 2 is provided with a one-side flange portion 2i that spreads outward in the circumferential direction from the base end portion of the one-side pilot portion 2h. The one-side flange portion 2i has a substantially star plate shape centered on the rotation axis L of the inner member 3, and the one-side end surface of the one-side flange portion 2i is ground for the purpose of improving flatness. You may give it. The one-side flange portion 2i is provided with bolt holes 2j at equal intervals on a concentric circle with the rotation axis L as the center. In the wheel bearing device 1, five bolt holes 2 j are provided, and each phase angle is 72 °. However, the four bolt holes 2j may be provided at positions where the respective phase angles are 90 °. Further, the six bolt holes 2j may be provided at positions where the respective phase angles are 60 °. The pitch circle diameter and phase angle of the bolt holes 2j are assumed to be equal to the pitch circle diameter and phase angle of the bolt holes 4j described later. Further, it is assumed that the bolt holes 2j and the bolt holes 4j have the same size and the same bolt pitch. This is because the one-side flange portion 2i and the other-side flange portion 4i are compatible with the vehicle body and the wheel.

  In addition, the wheel bearing device 1 is provided with an other side pilot portion 4h at the other end of the inner member 3 (hub wheel 4). The other-side pilot portion 4h has a substantially cylindrical shape centered on the rotation axis L of the inner member 3, and a predetermined uneven shape is formed on the outer peripheral surface of the other-side pilot portion 4h (FIG. 12). reference). The diameter of the other side pilot portion 4h and the uneven shape of the outer peripheral surface are equal to the diameter of the one side pilot portion 2h and the uneven shape of the outer peripheral surface described above. This is because the other side pilot portion 4h and the one side pilot portion 2h are compatible with each other for the vehicle body and the wheel.

  In addition, the inner member 3 (hub wheel 4) is provided with an outer flange portion 4i that spreads outward in the circumferential direction from the proximal end portion of the other pilot portion 4h. The other side flange portion 4i has a substantially disc shape centering on the rotation axis L of the inner member 3, and the other side end surface of the other side flange portion 4i is ground for the purpose of improving flatness. You may give it. The other flange portion 4i is provided with bolt holes 4j at equal intervals on a concentric circle with the rotation axis L as the center. In the wheel bearing device 1, five bolt holes 4 j are provided, and each phase angle is 72 °. However, the four bolt holes 4j may be provided at positions where the respective phase angles are 90 °. Further, the six bolt holes 4j may be provided at positions where the respective phase angles are 60 °. The pitch circle diameter and phase angle of the bolt holes 4j are assumed to be equal to the pitch circle diameter and phase angle of the bolt holes 2j described above. Further, it is assumed that the bolt holes 4j and the bolt holes 2j have the same size and the same bolt pitch. This is because the other-side flange portion 4i and the one-side flange portion 2i are compatible with each other for the vehicle body and the wheel.

  Up to this point, the compatibility between the one-side pilot portion 2h and the other-side pilot portion 4h and the one-side flange portion 2i and the other-side flange portion 4i has been described. If it is a limited application, the pilot part (4h or 4i) on the vehicle body side only needs to be positioned on the knuckle 12. Therefore, it is not necessary to process the two pilot portions 4h and 4i, and the processing can be omitted for one pilot portion (any of 4h and 4i).

  Next, the 1st usage aspect of the wheel bearing apparatus 1 is demonstrated using FIG. In this usage mode, the wheel bearing device 1 is used for a driven wheel.

  In the first usage mode, the wheel bearing device 1 is attached to the vehicle body using the one-side pilot portion 2h and the one-side flange portion 2i. Specifically, the wheel bearing device 1 is configured such that the one-side pilot portion 2h is fitted into the hole portion 12a of the knuckle 12, and the one-side flange portion 2i is in contact with the side surface portion 12b of the knuckle 12. It is attached via a bolt 12c. The wheels are attached to the other pilot part 4h and the other flange part 4i of the wheel bearing device 1. More specifically, the wheel fits the hole portion 13a of the wheel 13 to the other side pilot portion 4h, and the bolt (wheel bolt) while the side surface portion 13b of the wheel 13 is in contact with the other side flange portion 4i. ) It is attached via 13c. However, as shown in FIG. 7, the brake rotor 14 may be sandwiched between the wheel 13 and the other flange portion 4 i. Moreover, although the several bolt hole 4j is provided in the other side flange part 4i, the structure which provided the some through-hole and the hub bolt 4m was penetrated to each may be sufficient ((X) of FIG. 7). reference). That is, the wheel is attached by the hub bolt 4m and the nut (wheel nut) 4n screwed to the hub bolt 4m.

  With such a use mode, the wheel bearing device 1 is configured such that the outer member 2 is fixed to the knuckle 12 constituting the vehicle body, and the wheels attached to the inner member 3 (the hub wheel 4 and the inner ring 5) are rotatable. Yes. Moreover, according to this usage mode, the load (load) from the road surface at the time of turning is first input to the inner member 3 having relatively low rigidity. Therefore, since the load (load) from the road surface is attenuated and transmitted to the vehicle body, the rigidity can be appropriately reduced with respect to the behavior (rolling or the like) of the vehicle body.

  Next, the 2nd usage aspect of the wheel bearing apparatus 1 is demonstrated using FIG. Such a use mode also uses the wheel bearing device 1 for a driven wheel.

  In the second usage mode, the wheel bearing device 1 is attached to the vehicle body using the other-side pilot portion 4h and the other-side flange portion 4i. Specifically, the wheel bearing device 1 is configured such that the other side pilot portion 4h is fitted into the hole portion 12a of the knuckle 12, and the other side flange portion 4i is in contact with the side surface portion 12b of the knuckle 12. It is attached via a bolt 12c. The wheels are attached to the one-side pilot portion 2h and the one-side flange portion 2i of the wheel bearing device 1. More specifically, the wheel fits the hole portion 13a of the wheel 13 to the one side pilot portion 2h, and the bolt (wheel bolt) with the side surface portion 13b of the wheel 13 in contact with the one side flange portion 2i. ) It is attached via 13c. However, as shown in FIG. 8, the brake rotor 14 may be sandwiched between the wheel 13 and the one-side flange portion 2i. Moreover, although the several bolt hole 2j is provided in the one side flange part 2i, the structure which provided the some through-hole and the hub bolt 2m was penetrated by each may be sufficient ((X) of FIG. 8). reference). That is, the wheel is attached by the hub bolt 2m and the nut (wheel nut) 2n screwed to the hub bolt 2m.

  With such a use mode, the wheel bearing device 1 is configured such that the inner member 3 (the hub wheel 4 and the inner ring 5) is fixed to the knuckle 12 constituting the vehicle body, and the wheel attached to the outer member 2 is rotatable. Yes. Further, according to such a usage mode, a load (load) from the road surface at the time of turning is first input to the outer member 2 having relatively high rigidity. Therefore, since the load (load) from the road surface is transmitted to the vehicle body without being attenuated, the rigidity can be appropriately increased with respect to the behavior of the vehicle body (rolling or the like).

  Next, the 3rd usage aspect of the wheel bearing apparatus 1 is demonstrated using FIG. In this usage mode, the wheel bearing device 1 is used for a drive wheel.

  In the third usage mode, the wheel bearing device 1 is attached to the vehicle body using the one-side pilot portion 2h and the one-side flange portion 2i. Specifically, the wheel bearing device 1 is configured such that the one-side pilot portion 2h is fitted into the hole portion 12a of the knuckle 12, and the one-side flange portion 2i is in contact with the side surface portion 12b of the knuckle 12. It is attached via a bolt 12c. The wheels are attached to the other pilot part 4h and the other flange part 4i of the wheel bearing device 1. More specifically, the wheel fits the hole portion 13a of the wheel 13 to the other side pilot portion 4h, and the bolt (wheel bolt) while the side surface portion 13b of the wheel 13 is in contact with the other side flange portion 4i. ) It is attached via 13c. However, as shown in FIG. 9, the brake rotor 14 may be sandwiched between the wheel 13 and the other flange portion 4i. Further, the other flange portion 4i is provided with a plurality of bolt holes 4j, but may have a structure in which a plurality of through holes are provided and the hub bolts 4m are inserted through the respective holes ((X) in FIG. 9). reference). That is, the wheel is attached by the hub bolt 4m and the nut (wheel nut) 4n screwed to the hub bolt 4m.

  By the way, when using the wheel bearing device 1 for driving wheels, it is necessary to connect the universal joint 15 of the power transmission device to the wheel bearing device 1. In such a usage mode, the cap member 11 is attached to the opening 4 c and the seal member 16 is attached instead of the ring member 7. The hub wheel 4 is formed with a joint connecting portion 4r by servo pressing and cutting. The joint connecting portion 4r includes a large-diameter hole 4s formed from the end surface of the small-diameter stepped portion 4a to the other side, a large-diameter hole 4t formed from the bottom surface of the opening 4c to the one side, a hole 4s and a hole. And a small-diameter hole 4u formed so as to connect 4t. On the other hand, the front end of the universal joint 15 has a drive shaft (hereinafter referred to as “spline shaft 15a”). The spline shaft 15a is provided with a bolt hole 15b at the center portion of the end face thereof. Therefore, when the spline shaft 15a is press-fitted into the hole 4s of the hub wheel 4 and fastened by the center bolt 15c through the hole 4u, the hub wheel 4 is completely fitted without rattling. Such a connection method is referred to as a press connect spline (refer to Japanese Patent Application Laid-Open No. 2013-230753, etc.), which is preferable because the connection portion can be reduced in size. However, the connection method is not limited, and a normal spline (or serration) fitting or face spline fitting method may be used.

  As described above, the wheel bearing device 1 allows the outer member 2 to be fixed to the knuckle 12 constituting the vehicle body, and the wheels attached to the inner member 3 (the hub wheel 4 and the inner ring 5) to be rotatable. Yes. Moreover, according to this usage mode, the load (load) from the road surface at the time of turning is first input to the inner member 3 having relatively low rigidity. Therefore, since the load (load) from the road surface is attenuated and transmitted to the vehicle body, the rigidity can be appropriately reduced with respect to the behavior (rolling or the like) of the vehicle body.

  As described above, the wheel bearing device 1 according to the present invention includes the one-side pilot portion 2h at the one-side end portion of the outer member 2 and the one side that spreads outward in the circumferential direction from the base end portion of the one-side pilot portion 2h. And a flange portion 2i. Further, the other side pilot part 4h at the other side end part of the inner member 3 (hub wheel 4 and inner ring 5), and the other side flange part 4i spreading outward in the circumferential direction from the base end part of the other side pilot part 4h are provided. Is provided. Further, the one-side pilot portion 2h and the other-side pilot portion 4h, and the one-side flange portion 2i and the other-side flange portion 4i are shaped to be compatible with the vehicle body (the knuckle 12) and the wheel (the wheel 13). And when attaching to a vehicle body (knuckle 12) using the 1 side pilot part 2h and the 1 side flange part 2i, a wheel (wheel 13) is attached to the other side pilot part 4h and the other side flange part 4i, and the other side When attached to the vehicle body (knuckle 12) using the pilot part 4h and the other side flange part 4i, a wheel (wheel 13) is attached to the one side pilot part 2h and the one side flange part 2i. According to such a wheel bearing device 1, it is possible to cope with one specification mode by assembling one side and the other side in the forward direction, and it is possible to deal with another specification mode by assembling the one side and the other side in the reverse direction. As a result, cost reduction can be realized by sharing parts.

  When this wheel bearing device 1 is used for a front wheel and a driven wheel, it is attached to the vehicle body (knuckle 12) using one side pilot part 2h and one side flange part 2i, and the other side pilot part 4h and the other side. It is preferable that a front wheel (front wheel 13) is attached to the flange portion 4i. According to such a wheel bearing device 1 (use mode of the wheel bearing device 1), the structure has an appropriate rigidity as a structure that supports the front wheel. As a result, it can contribute to realization of an appropriate turning characteristic. More specifically, although it depends on various specifications, it can contribute to the realization of a turning characteristic that is weak understeer and the improvement of the transient characteristic of the vehicle behavior in a lane change or the like.

  On the other hand, when this wheel bearing device 1 is used for a rear wheel and a driven wheel, it is attached to the vehicle body (knuckle 12) using the other side pilot part 4h and the other side flange part 4i, and the one side pilot part It is preferable that a rear wheel (rear wheel 13) is attached to 2h and the one-side flange portion 2i. According to such a wheel bearing device 1 (use mode of the wheel bearing device 1), the structure is suitable for a structure that supports the rear wheel. As a result, it can contribute to realization of an appropriate turning characteristic. More specifically, although it depends on various specifications, it can contribute to the realization of a turning characteristic that is weak understeer and the improvement of the transient characteristic of the vehicle behavior in a lane change or the like.

  In addition, in the wheel bearing device 1 according to the present invention, when used for front wheels and drive wheels, or rear wheels and drive wheels, the vehicle body (knuckle) is formed using the one-side pilot portion 2h and the one-side flange portion 2i. 12) and a wheel (wheel 13 of the wheel) is attached to the other side pilot part 4h and the other side flange part 4i. Further, holes 4 s and 4 t are formed in the inner member 3 (hub wheel 4) with the rotation axis L of the inner member 3 as the center. The drive shaft (spline shaft 15a) can be press-fitted into the inner member 3. According to the wheel bearing device 1, it can be used for a driven shaft or a drive shaft.

  Below, the structure applicable to the wheel bearing apparatus 1 is demonstrated using FIGS. 7-9.

  The wheel bearing device 1 may include a magnetic encoder 17 so that the rotational speed of the wheel can be detected.

  The magnetic encoder 17 has a substantially annular shape and magnetic poles (N pole / S pole) arranged alternately in the circumferential direction. Magnetic encoder 17 is NBR (acrylonitrile-butadiene rubber), HNBR (hydrogenated acrylonitrile-butadiene rubber) excellent in heat resistance, EPDM (ethylene propylene rubber), ACM (polyacrylic rubber) excellent in heat resistance and chemical resistance In addition to synthetic rubber such as FKM (fluoro rubber) or silicon rubber, it is composed of ferrite magnetic powder or rare earth magnetic powder. In addition to PVC (vinyl chloride), PC (polycarbonate) excellent in heat resistance, PP (polypropylene), PE (polyethylene) excellent in heat resistance and chemical resistance, or synthetic resin such as polyamide, ferrite magnetic powder or It is composed of rare earth magnetic powder.

  In the first use mode described above, a ring member 18 may be provided instead of the ring member 7, and the magnetic encoder 17 may be vulcanized and bonded to the ring member 18 (see FIG. 7). The ring member 18 is fitted to the outer periphery of the inner member 3 (inner ring 5). With such a structure, it is possible to detect a change in magnetic pole per unit time by a magnetic sensor (not shown). That is, it is possible to detect the rotational speed of the inner member 3 and thus detect the rotational speed of the wheels. The magnetic encoder 17 is integrated with a ring member 18 fitted to the outer periphery of the inner member 3 (inner ring 5). Therefore, it can be said that the magnetic encoder 17 is fitted to the outer periphery of the inner member 3.

  In the second usage mode described above, the ring member 19 may be provided as a new component, and the magnetic encoder 17 may be vulcanized and bonded to the ring member 19 (see FIG. 8). The ring member 19 is fitted on the outer periphery of the outer member 2. With such a structure, it is possible to detect a change in magnetic pole per unit time by a magnetic sensor (not shown). That is, it is possible to detect the rotational speed of the outer member 2 and thus detect the rotational speed of the wheels. The magnetic encoder 17 is integrated with a ring member 19 fitted to the outer periphery of the outer member 2. Therefore, it can be said that the magnetic encoder 17 is fitted to the outer periphery of the outer member 2.

  Further, in the third usage mode described above, since the ring member (hereinafter referred to as “slinger 20”) constituting the seal member 16 is provided, the magnetic encoder 17 may be vulcanized and bonded to the slinger 20 (FIG. 9). The slinger 20 is fitted to the outer periphery of the inner member 3 (inner ring 5). With such a structure, it is possible to detect a change in magnetic pole per unit time by a magnetic sensor (not shown). That is, it is possible to detect the rotational speed of the inner member 3 and thus detect the rotational speed of the wheels. The magnetic encoder 17 is integrated with a slinger 20 fitted to the outer periphery of the inner member 3 (inner ring 5). Therefore, it can be said that the magnetic encoder 17 is fitted to the outer periphery of the inner member 3.

  As described above, the wheel bearing device 1 according to the present invention includes the substantially annular magnetic encoder 17. And when attaching to a vehicle body (knuckle 12) using the 1 side pilot part 2h and the 1 side flange part 2i, the magnetic encoder 17 is fitted by the outer periphery of the inner member 3. As shown in FIG. According to the wheel bearing device 1, the rotational speed of the wheel can be detected even in a predetermined usage mode (first and third usage modes). Further, when the other side pilot portion 4 h and the other side flange portion 4 i are used to attach to the vehicle body (the knuckle 12), the magnetic encoder 17 is fitted to the outer periphery of the outer member 2. According to the wheel bearing device 1, the rotational speed of the wheel can be detected even in predetermined usage modes (second and fourth usage modes).

  Next, the ring member 7 which concerns on other embodiment is demonstrated using FIG. FIG. 10 is an enlarged view of a portion corresponding to the region R1 in FIG.

  In the ring member 7 shown in FIG. 10A, an annular steel plate is bent by press working, and an axial cross section is formed in a substantially L shape. The ring member 7 is bent so that a cylindrical fitting portion 7 a, a disc-shaped side plate portion 7 b extending from one end of the ring member 7 toward the inner ring 5, and a tip portion thereof along the outer peripheral surface of the inner ring 5. A folded portion 7c is formed. For this reason, a narrow gap is formed between the folded portion 7 c of the ring member 7 and the inner ring 5. Therefore, the ring member 7 can suppress the flow to one side of the grease.

  The ring member 7 shown in FIG. 10B is configured by an outer ring member 71 fitted to the inner circumference of the outer member 2 and an inner ring member 72 fitted to the outer circumference of the inner member 3. Is done. The outer ring member 71 is formed by bending an annular steel plate by press working and has an approximately L-shaped axial cross section. The outer ring member 71 is formed with a cylindrical fitting portion 71 a and a disk-like side plate portion 71 b extending from one end toward the inner ring 5. On the other hand, the inner ring member 72 is also formed by bending an annular steel plate by press working and having an axial cross section in a substantially L shape. The inner ring member 72 is formed with a cylindrical fitting portion 72a and a disk-shaped side plate portion 72b extending from one end of the inner ring member 72 toward the outer member 2. The end surface of the side plate portion 71b and the end surface of the side plate portion 72b are opposed to each other. For this reason, a narrow gap is formed between the side plate portion 71 b of the outer ring member 71 and the side plate portion 72 b of the inner ring member 72. Therefore, the ring member 7 can suppress the flow to one side of the grease.

  A ring member 7 shown in FIG. 10C includes an outer ring member 71 fitted to the inner circumference of the outer member 2 and an inner ring member 72 fitted to the outer circumference of the inner member 3. Is done. The outer ring member 71 is formed by bending an annular steel plate by press working and has an approximately L-shaped axial cross section. The outer ring member 71 is formed with a cylindrical fitting portion 71 a and a disk-like side plate portion 71 b extending from one end toward the inner ring 5. On the other hand, the inner ring member 72 is also formed by bending an annular steel plate by press working and having an axial cross section in a substantially L shape. The inner ring member 72 is formed with a cylindrical fitting portion 72a and a disk-shaped side plate portion 72b extending from one end of the inner ring member 72 toward the outer member 2. The one side surface of the side plate portion 71b and the other side surface of the side plate portion 72b are opposed to each other. For this reason, a narrow gap is formed between the side plate portion 71 b of the outer ring member 71 and the side plate portion 72 b of the inner ring member 72. Therefore, the ring member 7 can suppress the flow to one side of the grease.

  Next, each pilot part 2h * 4h which concerns on other embodiment is demonstrated using FIG. 11 and FIG. FIG. 11 is an enlarged view of a portion corresponding to the region R2 in FIG. FIG. 12 is an enlarged view of a portion corresponding to the region R3 in FIG.

  A predetermined uneven shape is formed on the outer peripheral surface of the one-side pilot portion 2h shown in FIG. Further, the uneven shape is the same as the uneven shape of the other pilot part 4h shown in FIG. More specifically, the one-side pilot portion 2h and the other-side pilot portion 4h are formed with wheel pilot portions 2ha and 4ha on the distal end side and brake pilot portions 2hb and 4hb on the proximal end side. The outer peripheral surfaces of the wheel pilot portions 2ha and 4ha and the brake pilot portions 2hb and 4hb are ground for the purpose of improving roundness. For this reason, the wheel 13 and the brake rotor 14 can be fitted to each of the one-side pilot portion 2h and the other-side pilot portion 4h (see FIGS. 7 to 9). Of course, it can also be fitted to the knuckle 12 (see FIGS. 7 to 9). As described above, the end surfaces of the one-side flange portion 2i and the other-side flange portion 4i are also ground for the purpose of improving flatness, so that the brake rotor 14 does not shake during rotation.

  The one-side pilot portion 2h shown in FIG. 11B has a predetermined uneven shape on its outer peripheral surface. Further, the uneven shape is the same as the uneven shape of the other pilot part 4h shown in FIG. More specifically, the one-side pilot portion 2h and the other-side pilot portion 4h are formed with wheel pilot portions 2ha and 4ha on the distal end side and brake pilot portions 2hb and 4hb on the proximal end side. The outer peripheral surfaces of the wheel pilot portions 2ha and 4ha and the brake pilot portions 2hb and 4hb are ground for the purpose of improving roundness. For this reason, the wheel 13 and the brake rotor 14 can be fitted to each of the one-side pilot portion 2h and the other-side pilot portion 4h (see FIGS. 7 to 9). Of course, it can also be fitted to the knuckle 12 (see FIGS. 7 to 9). As described above, the end surfaces of the one-side flange portion 2i and the other-side flange portion 4i are also ground for the purpose of improving flatness, so that the brake rotor 14 does not shake during rotation.

  The one-side pilot portion 2h shown in FIG. 11C has a predetermined uneven shape on its outer peripheral surface. Further, the uneven shape is the same as the uneven shape of the other-side pilot portion 4h shown in FIG. More specifically, the one-side pilot portion 2h and the other-side pilot portion 4h are formed with wheel pilot portions 2ha and 4ha on the distal end side and brake pilot portions 2hb and 4hb on the proximal end side. The outer peripheral surfaces of the wheel pilot portions 2ha and 4ha and the brake pilot portions 2hb and 4hb are ground for the purpose of improving roundness. For this reason, the wheel 13 and the brake rotor 14 can be fitted to each of the one-side pilot portion 2h and the other-side pilot portion 4h (see FIGS. 7 to 9). Of course, it can also be fitted to the knuckle 12 (see FIGS. 7 to 9). As described above, the end surfaces of the one-side flange portion 2i and the other-side flange portion 4i are also ground for the purpose of improving flatness, so that the brake rotor 14 does not shake during rotation.

  Next, each flange part 2i * 4i which concerns on other embodiment is demonstrated using FIG. 13 and FIG. FIG. 13 is a view seen from the arrow B in FIG. FIG. 14 is a view seen from an arrow C in FIG.

  When the wheel bearing device 1 is attached to the knuckle 12 for weight reduction, the unnecessary portions of the flange portions 2i and 4i on the stationary member side are removed, so that the shapes of the flange portions 2i and 4i are reduced. It is also possible to satisfy the specification requirements. That is, when the hatched portion in FIGS. 13 and 14 is an unnecessary portion, the specification requirement for the shapes of the flange portions 2i and 4i is satisfied by removing the portion. At this time, the bolt holes 2j and 4j may be processed and formed according to specification requirements.

  In this way, even if there are various specification requirements for the shapes of the flange portions 2i, 4i, etc., it is possible to share the material before each cutting. Therefore, cost reduction can be realized by sharing at least the material.

DESCRIPTION OF SYMBOLS 1 Wheel bearing apparatus 2 Outer member 2c Outer rolling surface 2d Outer rolling surface 2h One side pilot part 2i One side flange part 2j Bolt hole 3 Inner member 4 Hub wheel 4a Small diameter step part 4c Opening part 4d Inner rolling Surface 4h Other side pilot portion 4i Other side flange portion 4j Bolt hole 5 Inner ring 5a Inner rolling surface 6 Rolling element 6a Ball row 6b Ball row 7 Ring member 8 Seal member 9 Core metal 10 Seal rubber 11 Cap member 12 Knuckle 13 Wheel 14 Brake Rotor 15 Universal joint 16 Seal member 17 Magnetic encoder

Claims (6)

An outer member having a double row outer raceway formed on the inner periphery;
A hub wheel having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub wheel, and a plurality of outer rings facing the double-row outer rolling surface on the outer periphery. An inner member in which the inner rolling surface of the row is formed;
In the wheel bearing device comprising: a double row rolling element that is interposed between the rolling surfaces of the outer member and the inner member so as to freely roll.
A one-side pilot portion at one end of the outer member;
A one-side flange portion extending from the base end portion of the one-side pilot portion to the outer side in the circumferential direction is provided,
The other side pilot part at the other side end of the inner member,
The other side flange portion extending from the base end portion of the other side pilot portion to the outer side in the circumferential direction is provided,
The one-side pilot part and the other-side pilot part and the one-side flange part and the other-side flange part are shaped to have compatibility with the vehicle body and the wheel,
When attached to the vehicle body using the one side pilot part and the one side flange part, the wheel is attached to the other side pilot part and the other side flange part,
The wheel bearing device according to claim 1, wherein when the other side pilot part and the other side flange part are used to attach to the vehicle body, the wheel is attached to the one side pilot part and the one side flange part.   When used as a front wheel and a driven wheel, it is attached to the vehicle body using the one side pilot part and the one side flange part, and the front wheel is attached to the other side pilot part and the other side flange part. The wheel bearing device according to claim 1.   When used as a rear wheel and a driven wheel, it is attached to the vehicle body using the other side pilot part and the other side flange part, and the rear wheel is attached to the one side pilot part and the one side flange part. The wheel bearing device according to claim 1. When used for front wheels and drive wheels or rear wheels and drive wheels, the one-side pilot portion and the one-side flange portion are used to attach the vehicle body to the other-side pilot portion and the other-side flange portion. Wheels are attached to
Further, the inner member has a hole formed around the rotation axis of the inner member,
The wheel bearing device according to claim 1, wherein the drive shaft can be press-fitted into the inner member. It has a substantially annular magnetic encoder,
2. The wheel for a vehicle according to claim 1, wherein the magnetic encoder is fitted to an outer periphery of the inner member when the one-side pilot portion and the one-side flange portion are attached to the vehicle body. Bearing device. It has a substantially annular magnetic encoder,
2. The wheel according to claim 1, wherein the magnetic encoder is fitted to an outer periphery of the outer member when the second pilot portion and the second flange portion are attached to the vehicle body. Bearing device.

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