JP2934729B2 - Wheel cover mounting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting a wheel cover, and more particularly to a wheel cover that is integrally formed of a plastic material and does not require any other parts for reinforcement or tensioning. It relates to a mounting device.

[Prior Art] As a conventional plastic wheel cover mounting device, there is a device which is fitted to a hump portion or a wheel nut of a rim, but is backed by a metal ring spring or the like to complement the creep property of plastic. It was essential.
For example, Japanese Patent Application Laid-Open No. 62-160902 and Japanese Patent Application No.
There are various publications such as 62-122855.

[Problems to be Solved by the Invention] However, in these conventional examples, although all are simple complementary parts using a ring spring, the cost of parts and management costs are high, and the cost of plastic materials is relatively small. This required a stopping structure and required assembling man-hours, and was extremely unsatisfactory in industry.

[Means for Solving the Problems] The present invention was developed from the above viewpoint, and completes a mounting device for a resin wheel cover that can be mounted on a wheel by integral molding of plastic without using other parts. Is the primary purpose.

Wheel covers made of only plastic integral molding have been proposed and manufactured only once in the past. But he was unable to escape the effects of creep. A second object of the present invention is to provide a mounting device that is not affected by creep.

Also, since creep is a property of plastic,
Despite the above, some form of backing is necessary.
In the present invention, a wheel disc is used as a backing member. A typical example of a conventional wheel disc is
There are USP.3575468 and USP.4361359 specifications, both of which are sandwiched by inserting a metal spring between the disk and the hump portion, and their mounting performance is unsatisfactory, In addition, it is also vulnerable to impact. A third object of the present invention is to provide a mounting device which is durable against all vibrations and impacts applied to the disk hole during running of the vehicle.

A still further object is to provide a wheel cover mounting device provided with means for integrating the above and achieving a good balance between rationality, economy and functional performance of production.

[Structure of the Invention] FIG. 1 is a sectional view of a main part showing a basic structure of the present invention. In the figure, a wheel cover 0 is composed of a resin-made wheel cover board 1 and several attachments, and the attachment is provided by mounting a rod 2 on the wheel cover board 1 via a column 3 including a cushion portion 4. It has been done. The rod 2
It is located between the rim 8 and the wheel disc 9 and abuts on the hump portion 81 of the rim 8 and the rim well bottom joining valley portion 91 of the wheel disc 9 and is passed. Along with this, the mounting body groups are arranged on the circumference of the wheel cover board 1 along the inner diameter of the rim 8.

The wheel disc 9 is firmly fitted to the inner surface of the well 80 of the rim 8 and is usually integrated by welding. At this time, the shape of the valley bottom junction valley portion 91 is formed to be deep and shallow depending on the width of the rim 8 and the offset amount of the wheel disk 9. on the other hand,
The ratio between the rolling and the pull-out force centering on the hump portion 81 of the rod body 2 can be varied depending on the part from which the column body 3 is led out from the rod body 2. 2 to 4 are explanatory diagrams thereof.

In FIG. 2, if it is assumed that the column pair 3 is derived from a point that divides the total length R of the rod body 2 into R1 and R2, the load P in the detaching direction mainly due to the mass of the wheel cover board 1 is a hump. Torque T1 about the rotation center 01 on the part 81 side and torque T2 about the rotation center 02 on the rim well bottom joint valley part 91 side
Is derived. Since the rim 8 and the wheel disc 9 may be considered to be rigid compared to the rod body 2 and the column body 3, the movement of the trajectory (hatching indication portion) of the rod body 2 around the center of rotation 01 is prevented, and the torque T1 is a retaining force. Act as On the other hand, the center of rotation
Since the rolling around 02 is not effectively prevented by the hump portion 81, the torque T2 is a sampling force. The load P at the time of running the vehicle is due to acceleration due to vibration and impact,
The torques T1 and T2 are derived at the same time, so that the retaining function works effectively. At this time, the column lead-out portion of the rod 2 is selected corresponding to the depth of the rim well bottom junction valley 91 as shown in FIGS. FIG. 3 shows a case where the rim well bottom junction valley portion 91 is deep and the trajectory depth D of the rod body 2 is also too deep, so the ratio (R1 / R) is set small. In FIG. 4, on the contrary, the ratio (R1 / R) is set large. In general, the rim width and the offset amount are determined first on the vehicle specifications, so that there is no problem in the above setting procedure.

The rod body 2 first comes into contact with the flange base R82 of the rim 8 and hangs down, enters along the inner surface of the rim 8, and comes into contact with the hump portion 81 of the rim 8 and the rim well. It is inserted into the rim well bottom valley 91 of the wheel disk 9 close to 80. At this time, if the pillar 3 includes the cushion portion 4, the cushion portion is largely bent to help the rod body 2 to be engaged with the regular position, and after being attached, the wheel that hits the rod body 2 The transmission of the vibration / impact to the wheel cover disk 1 causes a time delay, and the transmission from the wheel cover disk 1 to the rod body 2 also causes transmission. Further, the cushion portion is made of a plastic material and has viscoelasticity, so that it also has a vibration / impact mitigation action, and has a strong falling-off resistance against vibration / impact. On the other hand, static
It can be removed by applying a quasi-static withdrawal force.

First Embodiment FIGS. 5 and 6 are cross-sectional views of a main part of a first embodiment of the present invention. 21 which is an example of the rod body 2 is a wheel cover board 1
Are connected via a thin-walled cushion 41 to an example 31 of the column 3 planted on the floor. When the wheel body 21 is in the mounted state of the wheel cover, the rod body 21 is inserted between the hump portion 81 and the rim well bottom valley portion 91 between the rim 8 and the wheel disc 9 and is fitted and fitted. Along with this, thin cushion 41 and pillar 31
Is largely bent and deformed.

The shaping and die-cutting of the rod body 21 to the pillar body 31 forming the attachment body are performed as shown in FIG. The slide mold 72 is added to the front mold 71 and the back mold 73.
It is formed by falling down. To remove the mold, open the front mold 71, escape the slide mold 72, and finally remove the back mold 73. At this time, the mold portion 731 corresponding to the inside of the thin wall 41 of the rod body 21 is forcibly pulled out,
The rod body 21 hangs down its head, and the thin-walled portion 41 is bent to finish cutting the mold. Therefore, the texture of the thin portion 41 is oriented and the bending strength is increased, so that physical properties suitable as a cushion and a hinge are provided. The operation of this example is the same as that of the means described above.

(Effects of Embodiment) In this embodiment, the wheel cover including the mounting device is completed only by integral molding of plastic, and does not require any other parts or assembly. That is, since the wheel cover is stopped by the wheel by the rod body 2 sandwiched between the hump portion 81 and the rim well bottom valley, there is no need to use any spring member made of metal or the like. High productivity and economic efficiency.

In addition, the provision of the cushion portion 4 on the column body 3 makes it possible to maintain and secure the falling-off resistance against vibration, impact, and the like of the disk wheel.

The conventional hump-mounted wheel cover had the drawback that it was difficult to attach and remove it if it did not have rigidity.However, the present case does not require rigidity, so thin and porous materials can be applied, and weight reduction can be achieved. . Also, for the same reason, a large air hole area is taken, heat radiation from brakes is good, and design freedom is wide. In this regard, the small footprint of the mounting device
Contribute synergistically. Further, since low rigidity is sufficient, a soft elastic material is also included in the applicable range, so that it is possible to maintain a high impact strength while achieving a reduction in thickness and weight.

Second Embodiment FIGS. 7 and 8 are a perspective view and a sectional view of a main part of a second embodiment of the present invention. In this example, the amplitude limiter is added to the column in the previous example, which also serves as reinforcement.It is suitable for limiting the eccentric movement of the wheel cover, especially when the material to be integrally molded is a relatively soft elastic material. I do.

The rod 21 and the thin cushion 41 of this example are the same as the previous example. However, if the applied material is provided with flexibility or elasticity, the cushioning property tends to be excessive, and
Since the deflection in the falling direction tends to be excessive,
With the center as the center, the shells 51, 51 forming the restriction body 5 in a U-shape are made to coexist.

The pillar 32 and the shells 51, 51 are integrated as shown in FIG.
Since it is erected on the wheel cover board 1, it can have great rigidity. It will be clear that the molding and die-cutting of this structure is possible in the same way as in the previous example.

In this embodiment, the rod 21 and the thin cushion 41 are the same as in the previous example, so that the mounting operation of this example is also the same.
The pillar 32 has the gussets 51 integrated on both sides, so that it is difficult to fall down and bend. Further, the outer edge 511 is provided with a space between the outer edge 511 and the seat back 83 of the rim 8. The movement of the cover 0 in the eccentric direction is restricted. Along with this, it is also possible to limit the shearing or bending stress mainly generated in the thin cushion 41 portion.

(Effects of Embodiment) The effect of this example is that, in addition to the effects of the previous example, the range of material selection can be expanded in the direction having soft or elastic properties. Plastic wheel covers have the problem of brittleness or impact resistance in low temperature environments, but if a general-purpose reforming means is used to address this problem, it is usually softened at high temperature ring strength. This example has an effect of obtaining a mounting device that can be applied even when the above-mentioned general-purpose modification is performed.Specific examples include, in a polypropylene wheel cover, modification with polyethylene to achieve the above-mentioned purpose. You get good results.

In addition, the eccentric movement of the wheel cover is limited, and the stress of the thin cushion 41 is limited, so that the durability can be improved.

[Third Embodiment] Figs. 9 and 10 show a perspective view and a sectional view of a main part of a third embodiment. This example presents another example of the attachment means that extends between the hump portion 81 of the rim 8 and the rim well bottom valley portion 91 of the wheel disc 9.

The rod 22 of this example is connected to the column 33 via a hinge 42 as the cushion 4. On both sides of the column 33, the side plates 52, 52, which are the restricting members 5, are integrated and planted from the wheel cover board 1, and the column 33 and the side plate 52 are H-shaped in plan sectional shape.

The method of molding and die-cutting of this structure can be realized in exactly the same way as in the previous example.

In this example, first, the back 522 of the side plate 52 abuts on the rim well bottom joint valley 91 of the wheel disk 9, and
Is specified. Since this relationship must also occur on the opposite side of the axle symmetry (not shown), the back 522 is set to be held on the wheel disc 9 and also requires a slight bending of the wheel cover disc 1. . However, the wheel cover disc 1 is larger than the fitting dimensional accuracy and is bent as clearly shown in the drawing, so that the above requirements are usually automatically satisfied.

Next, the rod body 22 is connected from the hump portion 81 of the rim 8 via the hinge 42 to the top of the above-defined column 33. Accordingly, the configuration of the connecting member from the hump portion 81 to the rim well bottom joining valley portion 91 is three-dimensionally intertwined with the rod 22, the hinge 42, the column 33, and the side plate 52, and includes many elastic bending portions. In particular, the hinge 42 responds flexibly. For this reason, a much more flexible fitting action can be obtained compared with the single rod body 2, and the dimensional accuracy is less demanding, the stress is small, the elasticity functions effectively, and the creep resistance is maintained for a long time. You.

The gap between the outer edge 521 of the side plate 52 and the seat back 83 of the rim 8 is
It has the same function as that described in the previous example, but in addition, in the configuration of this example, a huge stress may be generated in the hinge 42 at a high temperature due to a difference in thermal expansion coefficient between the metal of the disk wheel and the plastic of the wheel cover. It also has a function to limit this. Specifically, in FIG. 10, the wheel cover disc 1 expanded and expanded in diameter by the contact of the gap is bent in the downward convex direction to reduce the stress.

(Effects of the embodiment) In addition to the effects described in the previous examples, this example has a strong mounting performance due to the above-mentioned flexible mounting.
It is resistant to vibrations and shocks, and has the effect of maintaining the long-term mounting performance over time, including changes in temperature.

Fourth Embodiment FIG. 11 is a perspective view of a main part of the fourth embodiment, and illustrates a measure for positively utilizing the air hole when the mounting body overlaps with the air hole of the wheel cover board.

There is an air hole 10 in the wheel cover board 1 and this and the rod 2
However, in some cases, the same position must be occupied for reasons such as limitations on the number of divisions. This example is pillar 3
This shows a measure of straddling the air hole 10 with 34 being an arc-shaped wide member, and the annular reinforcing rib 11 of the wheel cover board 1 is optional.

The rod 22 is the same as the previous example, and is continuously provided from the top of the column 34 via the hinge 42. The molding / molding of this structure is different from the previous example, and since the lower surface of the rod body 22 can be manufactured by the front mold inserted through the air hole 10, the slide mold is unnecessary, and only the front mold and the back mold are required. It can be produced in a sex split type. With this, rod body
Since the shape of the hinge 22 can be formed in the illustrated shape, that is, the shape in use, the hinge 42 does not need to be thinned for the purpose of die-cutting.
In general, a means for enhancing the three-dimensional effect by providing a standing edge around the air hole 10 is preferably used. However, if the cross hole 341 is provided, it is possible to cope with the same molding method.

The back edge 342 of the column 34 is to be brought into contact with the rim well bottom junction valley 91 similarly to the back top 522 in FIG. 10 in the previous example, but the entire edge of the wide column 34 is applied to the surface of the wheel disc 9. It is not necessary, and it is desirable that the arc of the column 34 is set tight (R is small) and only the both ends of the back edge 342 are in contact with each other, because the warpage elasticity of the column 34 itself can be utilized.

As in the case of the connection to the hump portion 81 and the rim well bottom valley portion 91 in the previous example, in this example, the connection fitting is performed via the rod 22, the hinge 42, and the column 34. As described above, the thickness of the hinge 42 is not limited in terms of molding thickness, so that the elasticity or the ease of bending at this portion can be freely set. Pillar
Since 34 has a wide width and its curvature can be freely set, appropriate elasticity can be imparted to this portion while keeping the stress small.

As a result, a tough and long-lasting mounting action is achieved while supplementing the creep properties of the plastic.

(Effects of Embodiment) This example has the same effects as the previous example, and is characterized by easy productivity which does not particularly require a slide type. In the present invention, only plastic molding is performed (except for painting).
Although this has the greatest effect in providing a completed wheel cover, in this example, there is also a remarkable effect that it can be formed only by male and female mold splitting. As a result, it is possible to cope with both mass production and small production, and an inexpensive effect is exhibited.

Fifth Embodiment FIGS. 12 and 13 are a perspective view and a sectional view of a main part of a fifth embodiment of the present invention. In this example, a column 35 largely bent in a "U" shape is used as the cushion means 4 and this is
The present invention also proposes a measure for avoiding the difficulty in mounting operation caused by providing a large bend by providing the projecting body 30 in addition to functioning as a common function. The protrusion 30 is a measure effective in improving operability even when applied to other embodiments.

The rod body 2 of the present embodiment has a rod body 23 having a large wall thickness to prevent buckling and bending, and is provided with meat stealers 230, 230 to prevent sink during molding. Derived from this, the pillars 35, 35 connected to the wheel cover board 1 each have music 351, 352 functioning as the cushion 4, and have a large "
Refracted into a mold. This bending is set so that there is a gap between the overhang 353 functioning as the restricting body 5 and the flange base R82 of the rim 8 when the wheel cover is mounted in the rim (see FIG. 13). . Projection 3 in the middle of pillars 35, 35
0 is erected from the wheel cover board 1 and, in the mounted state, a gap g is provided between the top thereof and the rod 23.
Dimensions are set to have

The steps of forming and removing the above-described structure are performed using a slide mold by utilizing the large bending of the column 35. As shown in FIG. 12, the shape of the pillar 35 at the time of molding is such that the rod 23 protrudes outside the wheel cover with respect to the protrusion 30, so that the inside of the protrusion 30 is removed from the back mold without undercut. It has a shape that can be done. The lower part of the rod 23, the lower part of the curved parts 351 and 352, the outer surface of the projection 30 and the like are formed and removed by a slide die.

The wheel cover integrally molded in this way is completed after a finishing process such as painting, etc.
Is introduced while sliding on the flange base R82,
The rod 23 hangs down and the upper half beam of the column 35 is bent and fitted as shown in FIG. Immediately after being fitted, especially a pillar
Since the flexure of the 35 is large, it generates a large internal stress, but it adapts over time due to the stress relaxation (or creep) characteristic of the plastic material. In other words, the secondary molding is automatically performed by the mounting operation.

The attachment action in this example is also substantially the same as that described in the previous example, but has a characteristic that it has a cushion function due to the large bending of the column 35. The cushion function is the thirteenth
After the installation shown in the figure is completed, it absorbs vibrations and shocks applied to the wheel and exhibits strong mounting performance.
On the other hand, the rod 23
Since the head hangs down and the various parts of the pillar 35 are largely bent, the symptom that the rod 23 is difficult to fit in the hump 81 also occurs. The delivery of the hump portion 81 of the rim 8 of the rod body 2 to the rim well bottom valley portion 91 of the wheel disc 9 is not limited to this example, but is also a so-called "fit-fit" in JIS terms in other embodiments. "Tightening"
However, the above symptoms can also occur in other cases to varying degrees. It is easy to deal with this symptom, and there is a so-called "knack of mounting". It is preferable to tap lightly just before the end of mounting, but it is difficult to disseminate information only to the user. Therefore, in this example, the projectile 30
A gap g is placed on the top of the rod 23 and held against the jaw of the rod 23,
When the wheel cover board 1 is pressed and bent during the mounting operation, the jaw of the rod body 23 is pushed up to fit in the hump portion. The value of the gap g is related to the easiness of bending of the wheel cover board 1, and a good result is usually obtained at 2 to 5 mm.

The overhang 353 of the column 35 is set to produce a gap between the flange R82 of the rim 8 and the eccentric movement of the wheel cover disc with the disk wheel is controlled only by this gap. That is, the overhang 353 has the function of the restriction body 5. Generally, when the steady rest is restricted at the flange base R82,
Since the oblique contact is caused, an impact component is also generated in the downward direction of the thirteenth illustration, that is, in the direction of removing the wheel cover, which causes trouble. The component forces are well absorbed, while the eccentric movement is effectively limited.

The structure of the pillar 35 which is largely bent further allows the close setting of the wheel cover and the end of the rim flange. With a wheel cover that uses a conventional hump-fit type mounting device, if this close setting is set, the impact force hitting the wheel cover at the end of the rim flange is directly transmitted to the mounting member and the wheel cover cannot be used. A gap was required between the flange and the end of the flange, which was not only unsightly but also free to infiltrate muddy water.

(Effects of the embodiment) In addition to inheriting all the effects of the other examples, this example facilitates the mounting operation, has a mounting performance that is resistant to vibration and shock, enables the setting of the rim close contact of the wheel cover, and eccentric movement. Despite the effective function of the limiting function, the effect of completing the wheel cover only by integral molding of plastic is still maintained.

For this reason, there is an effect that an inexpensive, high-performance, and excellent cost-performance wheel cover mounting device can be provided.

[Effect of the Invention] As described above, the wheel cover provided with the device for mounting a wheel cover according to claim 1 of the present invention can be integrally manufactured by a plastic injection molding process. Since it is not necessary to use a component other than the wheel cover, for example, a metal spring member, the productivity and economic efficiency of the wheel cover provided with the mounting device are greatly improved.

Further, according to the wheel cover mounting device of the second aspect of the present invention, the drop resistance of the disk wheel against vibration, impact force, and the like is enhanced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an essential part showing basic means of the present invention, and FIG.
5 to 6 are explanatory diagrams of the first embodiment of the present invention, FIGS. 7 and 8 are explanatory diagrams of the second embodiment of the present invention, and FIGS. FIG. 10 is an explanatory view of a third embodiment of the present invention, FIG. 11 is an explanatory view of a fourth embodiment of the present invention, and FIGS.
FIG. 13 is an explanatory view of a fifth embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Wheel cover board, 2 ... Rod body 3 ... Column body, 4 ... Cushion 5 ... Restriction body, 6 ... Projection body 7 ... Molding die, 8 ... Rim 9 ... Wheel disc 0 …… Overall concept representing the entire wheel cover

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60B 7/06

Claims (2)

(57) [Claims] (1) On the back side of a resin wheel cover board (1),
Hump (81) of rim (8) and wheel disc (9)
A rod body (2) that abuts and is fitted over both of the rim well bottom joint valleys (91) of the rim well, and the rod body from the rim well bottom joint valley (91) side of the rod body (2) (2) is formed integrally with the resin wheel cover board (1) to form a column (3) that is integrally connected with the resin wheel cover board (1).
When the rod body (2) receives a load (P) in the detaching direction with respect to the wheel disc (9) of the resin wheel cover board (1), the hump portion (81) and the rim well bottom valley portion (91).
A wheel cover mounting device, which is positioned so as to increase a stop fitting force between the wheel covers. 2. A cushion (4) is provided on the column (3).
The mounting device for a wheel cover according to claim 1, further comprising: