JPH04130504U - Rolling bearing unit for wheel support - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the use of the same type of unit even when changing the height of the vehicle body, such as in FF vehicles and 4WD vehicles. [Structure] First and second mounting holes 10 and 11 are provided at the four corners of a mounting flange 9 for supporting and fixing a wheel supporting rolling bearing unit to a suspension device. Distance _L2 from the horizontal plane passing through the center of rotation to the first mounting holes 10, 10 and the second mounting hole 1
The distance L ₃ up to 1 and 11 is made different. By changing the direction in which the mounting flange 9 is attached to the suspension system, the height of the vehicle body can be adjusted in two levels.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The rolling bearing unit for wheel support according to this invention is suitable for suspension systems of automobiles. It is used to support the wheels so that they can rotate freely, for example, two-wheel drive vehicles (2WD vehicles). The same bearing unit can be used for vehicle models with By doing so, we aim to reduce component costs.

0002

[Conventional technology]

In recent years, attention has been paid to the driving stability of 4WD vehicles, and the engine is usually installed at the front of the vehicle. The 4-wheel drive system is also used in general passenger cars (FF cars) that drive only the front wheels by the engine. Increasingly, WD cars are available. In this way, 4WD cars are based on FF cars. When configuring a The configuration is such that the rear wheels are driven by the rear shaft.

0003 In this way, when configuring a 4DW car based on a FF car, there are propellers that are not available in a FF car. Due to the provision of the rear shaft, it is necessary to increase the height of the vehicle body.

0004 In other words, even when preparing a FF car and a 4WD car in the same car model, the gas tank, etc. It is necessary to use the same parts as much as possible to reduce costs, but the height of the car body Same as the F car, but the propeller shaft to configure the 4WD car is placed under the floor. This may cause interference between the propeller shaft and the gasoline tank. this Traditionally, when building a 4WD car based on a FF car, the height of the car body has been increased. It is. When increasing the height of the vehicle, the suspension system must be equipped with wheel support rollers to support the wheels. By changing the bearing unit, the positional relationship between the suspension system and the wheels can be changed.

[0005] Conventionally, the above-mentioned wheel supporting rolling bearing units have been used for FF vehicles and 4WD vehicles. There were two types available, one for cars, but parts manufacturing and parts management became troublesome, and the cost was reduced. This causes strikes to increase. In view of these circumstances, Utility Model Application Publication No. 2-124766 is a rolling bearing unit for supporting a single type of wheel, with the structure shown in Figures 5 and 6. Accordingly, it has been proposed to make it possible to change the support height of the wheels.

[0006] In FIGS. 5 and 6 showing this conventional structure, 1 is a holding cylinder supported by a suspension device. , 2 is an outer ring, and the inner circumferential surface 3 and outer circumferential surface 4 of this outer ring 2 are eccentric with respect to each other. or, An inner ring 5 is rotatably supported inside the outer ring 2 via a plurality of rolling elements 6, 6. has been done. The wheel is held by a shaft supported inside the inner ring 5. It is rotatably supported by the cylinder 1.

[0007] When changing the height of the vehicle body, the outer ring 2 is rotated inside the holding tube 1. example For example, when lowering the height of the car body to configure an FF car, as shown in Figure 5, When the inner ring 5 is positioned relatively high inside the holding cylinder 1 to increase the height of the vehicle body, As shown in FIG. 6, the inner ring 5 is positioned relatively low inside the holding cylinder 1.

[0008]

[Problem that the idea aims to solve]

However, in the case of the conventional structure described above, the inner circumferential surface 3 and the outer circumferential surface 4 are eccentric to each other. It is troublesome to make the outer ring 2, and the manufacturing cost of the rolling bearing unit for supporting the wheel increases. cormorant. Also, some kind of rotation prevention means is used to prevent the outer ring 2 from rotating inside the holding cylinder 1. Unless otherwise prevented, keep the inner ring 5 in a low position inside the holding cylinder 1 as shown in Figure 6. I can't keep it. It is troublesome to configure the above-mentioned rotation prevention means, and it is necessary to support the wheels. This increases the manufacturing cost of the rolling bearing unit.

[0009] The rolling bearing unit for wheel support of this invention eliminates all of the above-mentioned disadvantages. It is something that

0010

[Means to solve the problem]

The rolling bearing unit for wheel support of this invention has an outer ring with an outer ring raceway formed on the inner peripheral surface. A corresponding member, an inner ring equivalent member with an inner ring raceway formed on the outer peripheral surface, and the above outer ring raceway and inner ring. A plurality of rolling elements provided between the raceway and the outer circumferential surface of the outer ring equivalent member. The mounting flange has a plurality of mounting holes formed in the mounting flange.

[0011] Furthermore, in the wheel supporting rolling bearing unit of the present invention, the above inner ring equivalent member The first, Make the first distances to the second mounting holes equal to each other, and pass the center line of the inner ring equivalent member. from the horizontal plane to the first mounting hole provided on both left and right sides of the upper part of the mounting flange. distance from the horizontal plane above to the second mounting holes provided on both sides of the bottom left and right sides of the mounting flange. It is characterized by having different distances from each other.

0012

[Effect]

In the case of the rolling bearing unit for wheel support of the present invention configured as described above, the mounting frame is By reversing the mounting direction of the lunge, the height of the parts equivalent to the outer ring and the parts equivalent to the inner ring can be increased. You can change the position.

[0013]

【Example】

1-2 show a first embodiment of the invention. Double row outer ring raceways 7, 7 on the inner peripheral surface A mounting flange 9 is formed on the outer peripheral surface of the intermediate portion of the outer ring 8. Roughly small size Each of the four corners of the molded mounting flange 9 has a first screw hole. mounting holes 10, 10 and second mounting holes 11, 11 are formed.

[0014] Further, inside the outer ring 8, a hub 12 and an inner ring 13, which are members equivalent to the inner ring, are provided. It is being That is, at the end of the hub 12, which has the inner raceway 14 formed on the outer peripheral surface of the intermediate part, Again, by fitting and fixing the inner ring 13 with the inner ring raceway 14 formed on the outer circumferential surface, a double-row inner ring can be achieved. It is a member corresponding to an inner ring having ring raceways 14, 14. And the inner ring of these double rows A plurality of rolling elements 1 are provided between the raceways 14, 14 and the double row outer ring raceways 7, 7, respectively. 5 and 15, the hub 12 is rotatably supported inside the outer ring 8. Ru.

[0015] Further, on the outer circumferential surface of the end of the hub 12, a portion of the outer ring 8 that is detached from the outer ring 8 is provided to support a wheel. A flange 16 is provided for holding.

Furthermore, in the wheel supporting rolling bearing unit of the present invention, from the vertical plane indicated by the chain line a in FIG. The first distance L ₁ from the first and second mounting holes 10 and 11 provided in the first and second mounting holes 10 and 11 are made equal to each other. Also, a second distance L from the horizontal plane passing through the center line of the inner ring equivalent member and represented by the chain line b in FIG. ₂ and a third distance L 3 from the horizontal plane to the second mounting holes 11, ₁₁ provided on both left and right sides of the lower part of the mounting flange 9 are made different from each other (L ₂ ≠L ₃ ).

[0017] The wheel supporting rolling bearing unit of the present invention configured as described above enables suspension The function itself when rotatably supporting wheels at The same is true for knits. That is, the first and second holes provided at the four corners of the mounting flange 9 The outer ring 8 is supported on the suspension device by bolts screwed into the mounting holes 10 and 11, and the hub 1 A wheel is fixed to the flange 16 at the two ends. The end of the drive shaft is placed inside the hub 12. Engage spline.

Furthermore, in the case of the wheel supporting rolling bearing unit of the present invention, by reversing the mounting direction of the mounting flange 9, the height positions of the outer ring 2 and the members corresponding to the inner ring can be changed. That is, the first mounting holes 10, 10 with a larger distance from the horizontal surface (second distance L ₂ ) are placed on top, and the second mounting holes 11, 11 with a smaller distance from the horizontal surface (third distance L ₃ ) are placed on top. By attaching the mounting flange 9 to the suspension system with the vehicle facing downward, the height of the vehicle body can be increased to accommodate a 4WD vehicle.

On the contrary, the first mounting holes 10, 10 with a larger distance from the horizontal surface (second distance L ₂ ) are placed downward, and the second mounting holes 10 with a smaller distance from the horizontal surface (third distance L ₃ ) are placed on the bottom. By attaching the mounting flange 9 to the suspension system with the mounting holes 11 facing upward, the height of the vehicle body can be lowered to accommodate a front-wheel drive vehicle. However, when used for FF vehicles, the drive shaft is not engaged inside the hub 12.

[0020] Next, FIGS. 3 and 4 show a second embodiment of the present invention. The first embodiment described above is In contrast to the hub 12 on which the inner ring 13 was fitted as a ring-equivalent member, this example In this case, the two inner rings 13, 13 serve as members equivalent to the inner rings. And this A shaft that supports the wheels is inserted inside the inner rings 13, 13. Other compositions and works The operation is the same as in the first embodiment described above.

[0021]

[Effect of the idea]

The rolling bearing unit for wheel support of the present invention is constructed and operated as described above. However, it has a simple configuration and can be manufactured at low cost, and the height of the car body can be changed in two ways. By sharing parts between FF and 4WD vehicles, production costs can be reduced. I can figure it out.

[Brief explanation of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG. 1;

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along line BB in FIG. 3;

FIG. 5 is a front view of a conventional example with the vehicle body lowered.

FIG. 6 is a front view similarly shown in a raised state.

[Explanation of symbols]

1 Holding cylinder 2 Outer ring 3 Inner peripheral surface 4 Outer surface 5 Inner circle 6 Rolling elements 7 Outer ring raceway 8 Outer ring 9 Mounting flange 10 First mounting hole 11 Second mounting hole 12 Hub 13 Inner circle 14 Inner raceway 15 Rolling element 16 Flange

Claims (1)

[Scope of utility model registration request] Claim 1: A member corresponding to an outer ring having an outer ring raceway formed on its inner peripheral surface, a member corresponding to an inner ring having an inner ring raceway formed on its outer peripheral surface, and a plurality of rolling elements provided between the outer ring raceway and the inner ring raceway. , in a rolling bearing unit for supporting a wheel having a mounting flange formed on the outer peripheral surface of the member corresponding to the outer ring and a plurality of mounting holes formed in the mounting flange, a vertical line passing through the center line of the member corresponding to the inner ring; The first distance from the plane to the first and second mounting holes provided on both the left and right sides of the upper and lower parts of the mounting flange are made equal to each other, and A second distance from the horizontal plane to the first mounting hole provided in the mounting flange and a third distance from the horizontal plane to the second mounting hole provided on both left and right sides of the lower part of the mounting flange are different from each other. A rolling bearing unit for wheel support.