JPH021681B2 - - Google Patents

Abstract

MOTOR VEHICLE WHEEL A vehicle wheel is supposed to be made in such a way that the spoke disk can be produced of light metal - with the safe holding of a hub cap on the spoke disk having to be guranteed. Soiling by oil leaking from the hub zone is also to be prevented. The proposal is made to fasten the cover plate 27 of a hub cap 26 by means of a screw part 28 which by means of an outer thread 38 engages in a central tapped hole 22. The diameters of the threads are here about 70 mm. Directly in the zone of the bearing surfaces of the head and of the screw part 28 there are pressure and sealing surfaces 32, 42 between head and cover plate 27 as well as sealing surfaces 23, 24, 29, 31 between the cover plate 27 and an extension 21 of the spoke disk 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor vehicle wheel with a wheel cap in the center of the spoke disk.

This type of car wheel was particularly often seen on French PKW's. In this case, the spokes were press-formed from a steel plate, and a cap nut was fixed at the center of the spoke, and the threaded hole of the cap nut was coaxial with the rotation axis. The screw hole had a diameter of approximately 10 millimeters, the head of the fixing part in the form of a screw had a hexagonal outline and a nut width that corresponded to that of the fixing nut for fixing the wheel. Therefore, it matches the nut width of the fixing nut. For tire replacement, it was easy to remove the wheel cap by extracting the threaded part using the standard wrench installed on the vehicle. Therefore, wheel caps were completely powerless in preventing theft. A further disadvantage of this known design was that the wheel cap was only pressed with its outer edge against the spoke disk. Therefore, if oil or grease flows into the oil cap of the axle, as can be seen in the accumulation, it reaches the outside of the spoke disk through the threaded hole, where it is sprayed by centrifugal force onto the fixing nut on the one hand and then At times, it can cause the fixing nuts to loosen and cause the wheel to come off, and on the other hand it can be blown outward through the gaps in the edges between the wheel cap and the spoke disk. In some cases, it reached the tires and weakened the tire's ground contact, creating a danger when driving.If it adhered to the brake disc or brake drum, it significantly reduced braking performance, creating a fatal danger. And also, because the contact area between the wheel cap and the spoke disk is not completely sealed, oil traces streak outwards beyond the outer edges, often combining with dust. It left a scar that is almost impossible to erase. But again,
Since it was not possible to prevent muddy water from entering in the opposite direction from the outside into the oil, a kind of circulation mechanism was formed, and the mixture of dust, water, and oil was again radiated outward from the vicinity of the wheel boss. It was about to happen.

Known steel spoke disks are also extremely limited in terms of visual shape.

Therefore, spoke discs are increasingly being manufactured from light metals, for example from aluminum alloys. In this case, there would be even more flexibility in terms of its shape, so that almost classical spoke shapes could also be imitated. In such embodiments, the wheel cap is usually constructed as one piece and is attached to the spoke disk by means of a locking connection. In this case, the above-mentioned connection is not entirely reliable and, especially in the case of wheel caps which are very visually attractive, it is quite easy for illegal theft to take place.

It is therefore an object of the invention to take advantage of the advantages associated with production from light metals, and on the other hand to make the product as simple as possible, ensuring that wheel caps, in particular covers, are securely fastened to spoke discs and that they cannot be removed by unauthorized persons. The object of the present invention is to form a motor vehicle wheel of the above-mentioned type in such a way that it is not possible to do so. Furthermore, the fixing screws covered by the wheel caps must be kept as clean as possible, in particular to prevent oil from reaching the outside of the spoke disk around the hubs. In addition, the spoke disks and wheel caps, i.e. the covers and their fixing elements, must be able to be formed into an elegant shape that meets visual requirements.

Secure installation is especially important in the following cases: This means that there is a so-called ventilation system that covers virtually the entire inner surface of the wheel, extends in a circle to the level of the outer edge, and has radial fins on the inside that force a flow of air to cool the brakes. This is the case when it is formed as a wheel cap. Since such ventilation devices are already available in a considerable number of varieties, their attachment to the spoke board must also be safe and reliable.

The above purpose is to provide a spoke disk having a substantially disk-like shape, a central hole coaxially provided in the center of the spoke disk with the axis of rotation, and a fixing portion formed on the outer surface of the spoke disk of the central hole. Furthermore, a circular recess is provided on the outer surface of the spoke plate, coaxially with the axis of rotation, surrounding the central hole, and a number of threaded bolts for fixing the spoke plate to the axle of an automobile are passed through the recess. In this case, the inner surface of the spoke board is formed in such a way that it can be roughly fitted onto the axle of the automobile, and the wheel cap consists of a fixing member having a shaft portion and a head, and a cover having a center hole. The fixing member has a shaft portion that can be fixed to the center hole fixing part of the spoke disk through the center hole of the cover plate, and the head has a contact surface with the cover plate. the spokes, thereby making it possible to fix the cover plate to the spoke disk, the cover plate being adapted to cover at least the recess of the spoke disk having the through hole. It is an automobile wheel with a disc and a wheel cap, and the spoke discs 11, 110 are made of light metal, and the center hole fixing parts 22, 220 are attached to the spoke discs 11, 11.
0 and also has a diameter of more than 5 centimeters, the cover plate 27, 270, together with the contact surface of the head of the fixing member 28, 280, has a substantially opposite annular surface 31, 310. Opposing surfaces 24, 240 of spoke discs 11, 110 from the inside
This is achieved by being accessible to The fixing part is preferably a threaded part. Since the central hole is relatively large (more than 5 cm in diameter), the threads formed in it can be formed directly in light metals, also in terms of strength, without the need for any separate metal reinforcement and therefore at all. Spoke discs can be manufactured from metal using a simple manufacturing method. Furthermore, the large diameter of the threaded portion allows the cover to be pressed directly onto the spoke disk around the central hole. This is because, due to the large diameter in this case, the contact surface of the fastening element is also correspondingly large.
Furthermore, since the tension in the fixing member is actually maintained without the radial reinforcement, the contact pressure between the fixing member head, cover and spoke disk can be increased, which also allows for a reliable fixation while at the same time , also improves sealing properties. Furthermore, the head of the fastening element can be correspondingly large and thus designed in a very visually pleasing manner. Naturally, the standard tool for changing tires normally installed on vehicles cannot be used on this large head of the fixing member, making illegal removal difficult and greatly preventing theft.

Preferably, the contact surface of the head of the fastening element 28 is designed as a conical side surface 42 and the cover plate 27 has a corresponding conical seating surface 32 in its area facing the annular surface 31 from the outside. . This achieves a particularly effective sealing between the fastening element, the cover and the spoke disk. Furthermore, in this case, the frictional contact using the wedge principle becomes strong, and the reliability of the connection is increased.

The invention will be described below with reference to particularly preferred embodiments shown in the drawings.

The spoke disk 11 shown in FIGS. 1 and 3 has a substantially disk-like shape. A large number of holes 13 are provided on the outer periphery 12.
A hole is provided for connecting the spoke disk 11 to the rim of the wheel in a manner known and not specifically shown. The spoke disk 11 has a number of holes 14 in its outer circumference, which give the spoke disk a spoke-like appearance. Central hole 16 in the center
is provided, the central hole 16 being coaxial to the axis of rotation 17. This central hole serves in a known manner to keep the lubricating oil center cap of the motor vehicle axle free, i.e., out of contact with the surface. That is, if the lubricating oil cap comes into contact with other members, its function will be diminished. A circular recess surrounding the center hole 16 is provided coaxially with the rotation axis 17 on the outer surface of the spoke disk, and a large number of through holes are provided in the recess, of which only one through hole 18 is provided. is shown in the drawing. Bolts for fixing the spoke disk to the axle of an automobile are inserted into this, and the inner surface 19 of the spoke disk 11 is shown here assembled to the axle of the automobile. A tightening nut is therefore fitted in a known manner on the opposite side of the through-hole.

The spoke disk 11 has a socket-shaped extension part 21 in the center of the recess and around the center hole 16, and the inner surface of the extension part 21 has a fixed part coaxially with respect to the center hole 16. It has a threaded portion 22 and also has a cylindrical groove 23 . The central hole 16 has a diameter of approximately 71 millimeters at its narrowest point and a diameter of approximately 26 millimeters.
It extends in the axial direction with a length of millimeters.
The threaded portion 22 has a diameter of approximately 70 mm and has a diameter of approximately 70 mm.
It is formed axially over a length of 10 mm. The groove 23 forms a step, which step forms the opposing surface 24 . The facing surface 24 has an inner diameter of about 72.5 mm and an outer diameter of about 77 mm. The cylindrical groove 23 is formed in the axial direction with a length of about 3 mm.

The wheel cap 26, which covers at least the central part together with the tightening nut, consists of a cover plate 27 and a fixing member 28. cover plate 27
has a cylindrical projection 29 coaxial with the axis of rotation 17 and projecting axially inward, the front surface of which forms an annular surface 31, which contacts the surface 24 facing the spoke disk 11. In this case, the cylindrical projection 29 has an outer diameter of 77 millimeters and therefore fits within the groove 23. The cover plate 27 on the outer part of the annular surface 31 has a conical seating surface 32, the outer surface 32 being approximately
In the case of a cone angle of 45 degrees, the inner diameter is approximately 72.5 mm and the outer diameter is approximately 80 mm. The conical seating surface 32 is followed radially outwardly by a transition surface 33 and furthermore inwardly by an annular groove 34 . This annular groove 34 is further followed in the outward radial direction by a facing plane 36 . Opposing plane 36 and transition plane 33 are axially offset by about 1 millimeter.

The fixing member 28 is formed from a synthetic resin portion 37 and a cap 39, in which case the portion 37 has a shaft portion with a threaded portion 38.
corresponds to the threaded portion 22. The remainder of the portion 37 belongs to the head of the fixing member 28, which is completed by a cap 39. Cap 39 and part 3
7 are fitted and connected to each other in the overlapping region 41, and are also in close contact with each other.

A contact surface is formed on the side of the head with the thread 38, which contact surface is designed as a conical side surface 42. This side surface 42 corresponds to the conical seating surface 32,
It expands from an inner diameter of about 68 mm to an outer diameter of about 82 mm. Continuing from the larger diameter is a radial flange 43 which forms at its outer edge an annular plane 44 which is tangent to the opposite plane 36 . Because of the annular groove 34 and also because in this part the cover plate 27 is curved in cross-section by the annular groove 34, the opposing plane 36 is somewhat elastic with respect to the conical seating surface 32; There is therefore no excessive overlap here, and a close-fitting effect between plane 44 and counter-plane 36 is ensured.

When the fixing member 28 with the threaded portion 38 is screwed into the threaded portion 22, the conical side surface 42 is wedge-shaped pressed against the conical seating surface 32, and the cover plate 27 made of synthetic resin is thus pressed against its cylindrical protrusion 2.
It is expanded somewhat within the range of 9. In this case, the outer periphery of the cylindrical protrusion 29 is pressed against the inner wall of the groove 23, and at the same time the annular surface 31 is pressed by the axial tension component.
is pressed against the opposing surface 24. A complete sealing surface is therefore created here, and at the same time the cover plate 27
are fixed to the spoke disk 11 by force due to large frictional contact. Furthermore, a wedge effect provides enhanced mutual positional stability and a sealing effect between the conical side surface 42 and the conical seating surface 32. It should be noted that the fixation member 28 and the tension forces are transmitted without radial aids. This is because the contact portion between the conical side surface 42 and the conical seating surface 32 is between the annular surface 31 and the opposing surface 2.
This is because the tension of the fixing member 28 is directly applied in a straight line because the fixing member 28 exists at a radial position approximately equal to the contact area between the fixing member 28 and the fixing member 28. Due to the large diameter of the threaded part 22, the threaded engagement is able to withstand sufficiently high loads and therefore also to create very high tension forces. The sealing between the plane 44 and the counterplane 36 acts as an auxiliary seal and prevents the ingress of dust into the inherent sealing surface at the conical side surface 42. The risk of the side surface 42 being damaged by infiltrated dust, that is to say forming grooves, is therefore avoided.

In the embodiment, the cap 39 constituting the head of the fixing member 28 is made of aluminum alloy and has an outer polygonal shape. Therefore, the fixing member 28 is approximately
It is installed and removed using a special wrench with a wrench width of 82 mm. Since this type of special wrench is usually not easily available, it is important that illegal persons are prevented from removing it. Note that the head of the fixing member can also be formed into an inner polygon. Furthermore, the polygon can also be composed of multiple curved parts. As shown in the partial view of FIG. 2, cover plate 27 continues with the spoke pattern of spoke disk 11. As shown in the partial view of FIG. Therefore,
The pattern must always be in a coincident position and, according to FIG. 1, pins 46 substantially parallel to the rotational axis 17 and also radially spaced relative to the rotational axis are attached to the cover plate. 27 is installed, and the dimensional hole 47 of the spoke board 11
I'm addicted to it. The spoke disk 11 can be made from an aluminum alloy, as can the cap 39. These spoke discs as well as the caps have a homogeneous surface, which is extremely important for the visual impression. The cover plate 27 as well as the part 37 are in the case of the invention made of synthetic resin, which is advantageous in terms of their shape for fastening and mounting and also avoids the risk of corrosion due to contact at contact surfaces. It will also happen.

Since the cover plate 27 is not in contact with the spoke disk at its outer edge, water (e.g., evaporated water) existing in the space between them may overflow in some cases, but in this case, the above-mentioned problem may occur. A good seal is maintained in the contact area, so no oil can leak out as a contaminant.

The cover plate 27 according to the embodiment described above is first of all visually distinctive. Functionally, it can also be configured as a ventilation device by providing fins to prevent overheating of the brakes. Such configurations are known and need not be described in further detail in this case. In this case, however, it is of paramount importance that the lever be shaped as described above with reference to FIG. It consists of a central part.

The one shown in FIG. 4 roughly corresponds to the cross-section from FIG. 1 shown in FIG. 3, but with some differences in the area of contact between the cover plate and the spoke disk. For ease of understanding, the numbers cited have been multiplied by 10. Threaded portion 220 of spoke board 110
Subsequently, at the front end of the socket-like extension 210, a facing surface 240 is formed as a conical seating surface. An annular surface 310 of cover plate 270 is formed to correspond to the opposing surface. Compared to FIG. 3, some transition surfaces with corners or edges, which are difficult to manufacture, can be omitted. Also shown in FIG. 4 is a spring ring 281 which is retained in a groove 282 in front of the threads 380 of the locking member 280. Due to this groove formation, the fixing member 280 and the cover plate 270 are interconnected without coming apart.

Instead of the locking mechanism by the pin 46 shown in FIG. 1, it is also possible to form a radially projecting projection on the extension 21 and an opposing engagement portion on the cover plate. Particularly if the cover plate is formed as a ventilation device, such as by being provided with fins, in order to prevent overheating of the brakes, the engagement part should be shaped to prevent displacement in any direction of rotation. It is preferable to configure

[Brief explanation of drawings]

FIG. 1 is a reduced cross-sectional view of a spoke disk with a cap in a motor vehicle wheel according to the invention. FIG. 2 is a partial view seen in the direction of the arrow in FIG. FIG. 3 is an enlarged partial view of FIG. FIG. 4 is an enlarged partial view similar to FIG. 3 of a modification according to the present invention. 11...Spoke board, 16...Central hole, 17...
... Rotation axis, 22 ... Threaded portion, 23 ... Cylindrical groove, 24 ... Opposing surface, 27 ... Cover plate, 28 ... Fixing member, 29 ... Cylindrical projection, 3
DESCRIPTION OF SYMBOLS 1... Annular surface, 32... Conical seating surface, 36... Opposing plane, 38... Threaded part, 39... Cap, 4
2... Conical side surface, 44... Annular plane.

Claims (1)

[Scope of Claims] 1. The spoke disk has a substantially disk-like shape, and a central hole is provided in the center coaxially with the rotation axis, and a fixing portion is provided from the outer surface of the spoke disk in the center hole. Furthermore, a circular recess is provided on the outer surface of the spoke plate, coaxially with the axis of rotation, surrounding the central hole, and a threaded bolt for fixing the spoke plate to the axle of an automobile is passed through the recess. In this case, the inner surface of the spoke disk is formed to be assembled to the axle of the automobile, and the wheel cap has a fixing member having a shaft portion and a head, and a center hole. a cover plate, the fixing member has a shaft part that can be fixed to the center hole fixing part of the spoke disk through the center hole of the cover plate, and the head part has a contact surface with respect to the cover plate. and thereby enable the cover plate to be fixed to the spoke disk, the cover plate covering at least the recess of the spoke disk having the through hole. It is an automobile wheel with spoke discs and a wheel cap, the spoke discs 11, 110 are made of light metal, and the central hole fixing parts 22, 220 are fixed to the spoke discs 11, 11.
0 and also has a diameter of 5 cm or more, the cover plate 27,270
are the opposing surfaces 24, 110 of the spoke disks 11, 110 from the inside at the substantially opposing annular surfaces 31, 310 together with the contact surfaces of the heads of the fixing members 28, 280.
240. An automobile wheel having the above-mentioned spoke disk and a wheel cap, which is capable of contacting the spoke disk. 2. The automobile wheel according to claim 1, wherein the fixing part is formed as a threaded part 22, 220, and the fixing member 28, 280 has a threaded part 38, 380 on its shaft part. . 3 The contact surface of the head of the fixing member 28 is the conical side surface 42
1 or 2, characterized in that the cover plate 27 has a corresponding conical seating surface 32 in its area facing the annular surface 31 from the outside. The wheels of the automobile described in . 4 The annular surface 31 is the front end of the cylindrical projection 29 provided at the tip of the center hole of the cover plate 27, and the opposing surface 24 of the spoke disk 11 is the cylindrical groove 23.
The groove 23 is coaxial with the threaded part 22 and extends from the front of the threaded part 22 to the outer surface of the spoke disk 11, and the cylindrical protrusion 29 is formed as a step part forming the groove 23. 4. A motor vehicle wheel according to claim 3, characterized in that the wheel fits within the vehicle wheel. 5. The automobile wheel according to claim 3, wherein the annular surface 310 and the opposing surface 240 are formed as conical seating surfaces. 6. The contact surface of the head with respect to the cover plate 27 is divided into a conical side surface 42 and an annular plane 44 substantially perpendicular to the axis of rotation 17, with the conical side surface 42
and a plane 44 of larger diameter reaching the conical side surface 42, an annular region is formed in which no contact occurs between the head and the cover plate. An automobile wheel according to claim 3, characterized in that: 7 The cover plate 27 is formed with an opposing plane 36 corresponding to the plane 44 of the head, which plane 3
6 is followed at a further radial distance by one axially oriented annular groove 34 and then by a uniaxially oriented transition surface 33 with respect to the opposing plane 36, which transition surface 33 has a conical shape. 7. The automobile wheel according to claim 6, wherein the seating surface 32 is continuous. 8 The diameter of the threaded portion 22 and the threaded portion 38 of the shaft portion is approximately 70 mm, and the annular surface 31 and the opposing surface 2
4 has an inner diameter of about 72.5 mm and an outer diameter of 77 mm, and when the conical side surface 42 and the conical seating surface 32 have a cone angle of about 45 degrees, the inner diameter is about 69-72.5 mm, the outer diameter is about 80-82 mm, and the flat surface 4
4 and the opposing plane 36 have an inner diameter of about 97 mm,
8. A motor vehicle wheel according to claim 7, characterized in that it is dimensioned to have an outer diameter of about 99 millimeters. 9 The threaded portion 22 and the threaded portion 38 of the shaft portion extend in the axial direction over a length of approximately 10 mm, the cylindrical groove 23 extends in the axial direction over a length of approximately 3 mm, and the cylindrical protrusion 29 extends in the axial direction over a length of approximately 3 mm. extending over a length of 3 mm or more in the direction, and having an opposing plane and a transition surface 33
9. A motor vehicle wheel according to claim 8, characterized in that the wheels are dimensioned such that the wheels are axially offset from each other by about 1 millimeter. 10 The spoke board 11 is made of aluminum alloy,
An automobile wheel according to any one of the preceding claims, wherein the cover plate 27 is made of synthetic resin. 11 The fixing member 28 is formed as two parts, one part 37 is made of synthetic resin and has a shaft and a contact surface belonging to the head, and the other part serves as a cap 39 to complement the head. An automobile wheel according to claim 10, characterized in that: 12. The automobile wheel according to claim 11, wherein the other portion 39 is made of an aluminum alloy. 13. An automobile wheel according to any of the preceding claims, characterized in that the head of the fixing member 28 has a polygonal outer shape. 14. The automobile wheel according to any one of claims 1 to 13, wherein the head of the fixing member is formed into an inner polygon. 15. The automobile wheel according to claim 11 or 12, wherein the polygon is composed of a large number of curved parts. 16 Pins 46 are arranged on the cover plate 27 substantially parallel to the axis of rotation 17 and spaced apart from each other in the radial direction with respect to the axis of rotation, and the pins fit into the dimensional holes 47 of the spoke disk 11. An automobile wheel according to claim 1, characterized by: 17 The spoke disk has a protrusion disposed in the radial direction with respect to the axis of rotation, and the engaging part of the cover plate abuts the protrusion from at least one side to prevent relative displacement in the opposite direction. An automobile wheel according to claim 1, characterized in that the wheel can be attached to the vehicle wheel.