JPH06191202A - Mismounting preventing structure for different size wheel - Google Patents

Abstract

PURPOSE:To provide such structure as to prevent the mismounting of front and rear wheels only by changing the height of the partial nut bearing surface of road wheels in a vehicle with the front and rear wheels of different sizes. CONSTITUTION:The nut bearing surface 9a of a front and a rear road wheels 2 is formed to be higher than the reference nut bearing surface 8a, and a hub bolt 3L in the corresponding place is lengthened according to the height of this nut bearing surface 9a. Mismounting can be thereby prevented only by changing part of the road wheels 2 without applying special machining or change to a wheel hub, so that the wheel hub can be used in common for other vehicles, and the strength of the wheel hub can be maintained. This results in dispensing with the addition of wheel hub machining equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing incorrect assembly of wheels when the wheels have different sizes in the front and rear of the vehicle.

[0002]

2. Description of the Related Art Heretofore, as a structure for preventing erroneous assembly of wheels of different sizes of this type, there has been proposed, for example, Japanese Utility Model Laid-Open No. 58-134101. This one is provided with a protrusion on the road wheel for an emergency tire and a space (annular groove) into which the protrusion can be inserted, in order to prevent the road wheel for an emergency tire from being erroneously assembled. . Therefore, the road wheel for emergency tires can be mounted on the wheel hub of the front wheel, but cannot be mounted on the wheel hub of the rear wheel that does not have a space into which the protrusion can be inserted. As a result, when the road wheel for an emergency tire, which has a grip force smaller than that of a normal tire, is erroneously mounted on the rear wheel, drift is prevented and the vehicle travel is prevented from becoming unstable.

[0003]

However, in the conventional structure for preventing mis-assembling of different-sized wheels, the road wheel is provided with a protrusion and the wheel hub is provided with a space into which the protrusion can be inserted. It is necessary to change both the wheel hub and the road wheel, making it difficult to share parts with other vehicles.

It is necessary to add equipment for processing the annular groove into which the protrusion can be inserted in the wheel hub. Since the annular groove is formed, the strength of the wheel hub is reduced. There were problems such as. Therefore, the present invention has been made by paying attention to such a conventional problem, and the height of a part of the nut seat surface of the road wheel is simply adjusted without special processing or modification on the wheel hub. It is an object of the present invention to solve the above-mentioned conventional problems by providing a structure capable of preventing erroneous assembly of wheels only by changing.

[0005]

SUMMARY OF THE INVENTION The present invention, which achieves the above object, provides a vehicle having different front and rear wheel sizes, in which at least one nut seat surface of one of the front and rear road wheels is used as a reference nut seat surface. While forming high,
It is characterized in that the hub bolt at the corresponding location is lengthened according to the height of the nut seat surface.

[0006]

[Operation] Attach the high nut seat of the road wheel to the long hub bolt attached to the wheel hub. In case of incorrect mounting, only a short hub bolt is combined with a high nut seat, and the wheel nut cannot be screwed onto the hub bolt. That is, it is impossible to attach the road wheel to a wheel hub of a different size, and erroneous assembly cannot occur.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. First, the configuration will be described. This is for vehicles with different sizes of front and rear wheels.
The steel road wheel 2 of the front wheel is attached to the. A plurality of (for example, four) hub bolts 3 are fixed to the front wheel hub 1 on the circumference of a predetermined radius at equal intervals, and the brake rotor 4 is attached using the hub bolts 3. At least one of the plurality of hub bolts 3 uses a hub bolt 3L (hereinafter, referred to as a long hub bolt) that is longer than a hub bolt 3S (hereinafter, referred to as a reference hub bolt) having the same reference length as the conventional one.

The road wheel 2 of this embodiment carries on its rim portion 5 a tire 6 having a size different from that of the rear wheel. Further, on the disk portion 7, a plurality of (for example, four) nut seats 8 having a reference height on the circumference of a predetermined radius are press-molded on the circumference equally. A cylindrical distance piece 9 is welded to at least one of the plurality of reference nut seats 8. The nut seat 10 thus formed has a seat surface 9a higher than that of the nut seat 8 having the seat surface 8a of the reference height which is press-molded on the disc portion 7. The height of the seat surface 9a is set so that the tip of the reference hub bolt 3S fixed to the front wheel hub 1 does not protrude outside the seat surface 9a. A long hub bolt 3L of a plurality of hub bolts fixed to the front wheel hub 1 is inserted into a nut seat 10 having a high seat surface, and a wheel nut 11 is screwed and tightened.
The remaining reference hub bolts 3S are inserted into the nut seats 8 each having a reference height. The lower half of FIG. 1 illustrates a case where the reference hub bolt 3S is mistakenly inserted into the high nut seat 10.

Although not shown in the drawings, nut seats 8 each having a standard height are formed on the disc portion of the rear wheel road wheel, and bolts of standard length are all provided in the bolt holes of each nut seat 8. 3S is inserted and the wheel nut 11 is screwed and tightened on the bolt end protruding from the nut seat surface 8a. Next, the operation will be described.

When the front road wheel 2 is mounted on the front wheel hub 1, the nut seat 10 having the raised nut seat surface 9a is aligned with the long hub bolt 3L of the front wheel hub 1, and the other nut seats 8 are the reference hub bolts 3S. Insert according to. As a result, all the nut seats 8a. Since the hub bolt protrudes from 9a, the road wheel 2 can be mounted on the front wheel hub 1 by screwing and tightening the wheel nuts 11 respectively. At this time, as shown in the lower half of FIG. 1, if the nut seat 10 having a high seat surface is mistakenly inserted into the reference hub bolt 3S, the nut tip does not protrude from the seat surface 9a of the nut seat, so the wheel nut 11 cannot be screwed.

When the front wheel load wheel 2 is mistakenly attached to the rear wheel, not only the nut seat 8 having a standard height but also the nut seat 1 having a raised nut seat surface 9a is used.
The reference hub bolt 3S is inserted into all the parts including 0. However, the wheel nut 11 cannot be screwed onto the reference hub bolt 3S inserted into the nut seat 10 having a high bearing surface, and the road wheel 2 of the front wheel may be mistakenly mounted on the rear wheel. Can be prevented.

On the other hand, the rear road wheels are all only nut seats 8 having a standard height. Therefore, if this is mistakenly attempted to be assembled to the front wheel hub 1 of the front wheel, the bolt will be extremely long protruding from the seat surface 8a of the nut seat 8 into which the long hub bolt 3L of the front wheel hub 1 has been inserted. I will end up. Therefore, even if the wheel nut 11 is screwed, the road wheel 2 cannot be tightened until it is fixed, and eventually the rear wheel road wheel is prevented from being erroneously assembled to the front wheel hub 1 of the front wheel. it can.

According to this embodiment, the front wheel hub 1 itself does not need to be subjected to any additional processing (in the conventional example, processing of an annular groove for preventing misassembly), and an existing one is used. Since it can be used as it is, it can be easily shared with other vehicles. Further, new equipment for machining the front wheel hub as in the conventional example is unnecessary. Therefore, there is an advantage that cost increase can be suppressed.

Further, since the front wheel hub 1 is not formed with an annular groove for preventing wrong assembly, the strength of the front wheel hub 1 is not reduced. On the other hand, as for the road wheel 2, the existing road wheel 2 can be used, and it suffices to weld the distance piece 9 to only one of the plurality of nut bearing surfaces 8a to be raised. Therefore, new equipment for forming the protrusion for preventing wrong assembly, which is required in the case of the conventional example, is unnecessary. Furthermore, by welding the distance piece 9, the effect of improving the strength of the nut bearing surface, which is peculiar to this embodiment, can be obtained.

FIG. 2 shows a second embodiment of the present invention. The configuration of this embodiment also applies to the front road wheel 2
Among the plurality of nut seats formed on the disk portion 7, the height of the seat surface 15a of at least one nut seat 15 is higher than the reference height. Then, the high nut seat 15 is directly press-molded like the nut seats of other standard heights, but is different from the first embodiment.

As shown in the figure, the height of the nut seat 15 is such that the tip end of the reference hub bolt 3S fixed to the front wheel hub 1 does not project outside from the seat surface 15a. Other configurations are similar to those of the first embodiment,
The erroneous assembly preventing function is similar to that of the first embodiment. Further, even in this embodiment, since the front wheel hub 1 itself can be used as it is,
The effects of sharing with other vehicles, new equipment for machining the front wheel hub, maintaining the strength of the front wheel hub 1, etc. are not particularly different from the effects of the first embodiment.

FIG. 3 shows a third embodiment in which the present invention is applied to an aluminum wheel. Front wheel hub 1
The structure of the road wheel mounting portion is substantially the same as in the first and second embodiments. The road wheel 20 is an aluminum wheel and has a plurality of hub bolt mounting holes 2
At least one of the first and second seats 22 is fitted with a seat block 22 to form a nut seat 23 having a nut seat surface 22a higher than a standard height. As shown in the lower half of FIG. 3, the height of the nut seat 23 is such that the tip of the reference hub bolt 3S fixed to the front wheel hub 1 does not project outside the nut seat surface 22a.

Other configurations, operations, and effects are almost the same as those in the above-mentioned embodiments. In each of the above embodiments, the case where the formation of the high bearing surface nut seat of the road wheel and the attachment of the long hub bolt to the wheel hub are applied to the front wheel side has been described, but the present invention is not limited to this and may be applied to the rear wheel side. , The same effect can be obtained by applying to only one side.

Further, although the high bearing surface nut seat of the road wheel is shown as only one place, it may be provided at two or more places. In the case of two places, if they are placed in opposite symmetrical positions,
Correspondingly, when it is installed according to the long hub bolts at two places provided on the wheel hub, it can be installed even if the phase is shifted by 180 degrees at the central angle, so in the end, two mounting positions can be obtained. There is an advantage that it is easy to assemble.

[0020]

As described above, according to the present invention,
In vehicles with different front and rear wheel sizes, at least one nut seat surface of either front or rear road wheel should be formed higher than the reference nut seat surface, and the hub bolt at the corresponding location should be set to the height of the nut seat surface. Since it was designed to be long to prevent incorrect assembly of the front and rear road wheels, only the road wheel needs to be changed, and wheel hubs that do not require any changes can be shared with other vehicles, and of course, wheel hub processing No additional equipment is required, cost increase is suppressed, and the strength of the wheel hub is not reduced. In addition, various effects can be obtained in practical use, such as an easy work of assembling the road wheel.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an erroneous assembly prevention structure for different-sized wheels of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the wrong assembly prevention structure for different-sized wheels of the present invention.

FIG. 3 is a cross-sectional view showing still another embodiment of the structure for preventing wrong assembly of wheels of different sizes according to the present invention.

[Explanation of symbols]

 2 Road wheel 3 Hub bolt 3L Long hub bolt 3S Reference hub bolt 8a (Reference) nut bearing surface 9a (High) nut bearing surface 15a (High) nut bearing surface 22a (High) nut bearing surface

Claims (1)

[Claims] 1. In a vehicle in which front and rear wheels have different sizes, at least one nut seat surface of one of the front and rear road wheels is formed to be higher than a reference nut seat surface, and a hub bolt at a corresponding place is provided with the nut seat. A structure to prevent incorrect assembly of wheels of different sizes, characterized by being made longer according to the height of the surface.