MXPA99004169A - Assembly of safety bolt for vehicle rods automotri - Google Patents

Abstract

The present invention relates to a safety stud assembly for automotive vehicle wheels characterized in that it comprises: a stud body comprising a threaded lower section, a head section, a threaded longitudinal bore in the head section and a circular shoulder protruding from said perforation in the upper face of the head section, a cap comprising a generally cylindrical body with an upper wall having a central circular perforation and a circular recess around said perforation, and a screw comprising a head whose The upper face has a recess that forms a combination, wherein the cap is placed on the head of the stud body and fastened by inserting the screw into the threaded longitudinal bore of the head section by using a tool containing said combination; where the circular projection protruding from said perforation on the sup face The upper section of the head section allows the cap to rotate around the head section of the stud body even when the screw is perfectly tightened

Description

ASSEMBLY OF BOLT OF SAFETY FOR RIÑES OF AUTOMOTIVE VEHICLES BACKGROUND OF THE INVENTION The present invention relates to assemblies of safety studs used to prevent theft of kidneys, and associated rims, from automotive vehicles. At present, it is common for the kidneys and tires of automotive vehicles to be stolen when they leave these vehicles parked on public roads. The above is due, mainly, to how simple it is to remove the studs that hold the wheel to the mass or drum of the car. The studs provided by the car manufacturers are standard manufacturing and features, so by using a cross wrench or standard tools, affordable in the market, it is very easy to remove studs from any car. On the other hand, there are two modalities of standard studs. In the first of these, a complete screw type "bolt" comprises a head section, generally hexagonal, by means of which it is placed and removed from the mass or drum of the automobile, and at the other end it comprises a threaded section that allows to introduce it. or remove it from the threaded holes provided for this purpose in the mass or drum of the automobile. In the second embodiment the stud consists of a threaded "nut", generally hexagonal, which is placed or removed in threaded projections provided in the mass or drum of the automobiles.

Various "bolt" bolts and "nut" safety bolts for automotive brakes are known, the purpose of which is to prevent them from being easily removed from the automobile, making it difficult for them to be stolen. For example, a safety bolt is known whose head, in the case of bolt-type bolts, or the nut itself in the case of bolt nuts, are not hexagonal but have a generally circular shape in which different bolts are made recesses that make up a combination or key. In this way, in order to place and remove the wheel of the automotive unit it is necessary to have a special tool or key that contains the negative of said combination or key. However, the safety studs described above as well as others available on the market, are manufactured in one piece, which results in that even without the key or special tool to remove them from the car is relatively easy to use tools such as pressure clamps to remove said studs and thus remove the kidneys and tires of the car. Therefore, it is an object of the present invention to provide a safety stud assembly that prevents the fenders of an automotive unit from being removed therefrom by persons not authorized to do so. It is another object of the present invention to provide a safety ring assembly for automobile tires that can be easily placed and removed from the unit by persons authorized to do so. It is still another object of the present invention to provide a safety ring assembly for automotive rings of simple configuration and low cost.

The foregoing and other objects will be apparent from reading the detailed description of the preferred embodiments of the invention based on the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of the safety stud assembly of the present invention; Figure 2 is a front elevational view of the body of the safety stud of the assembly of Figure 1; Figure 3 is a top plan view of the stud of Figure 2; Figure 4 is a top plan view of the cap for the safety stud assembly of Figure 1; Figure 5 is a top plan view of the screw for the safety stud assembly of Figure 1; Figure 6 is a front elevation view of a second embodiment of the safety stud body for the assembly of the present invention; Figure 7 is a bottom perspective view of the body of the stud of Figure 6; and Figure 8 is a front elevational view of a key for the safety stud assembly.

DESCRIPTION OF THE PREFERRED MODALITIES As illustrated in Figure 1, the safety stud assembly 10 of the present invention comprises a stud body 12, a cap 14 and a screw 16. In accordance with a first embodiment of the invention, the stud body 12 for The safety stud assembly is a screw-type stud, as can be seen in Figures 2 and 3, which comprises a lower threaded section 18 to be threadedly introduced in the conventional manner to the mass or drum of the automotive unit, a head section 20 of generally hexagonal shape, although it may assume any geometrical or irregular shape and a threaded longitudinal bore 13 from which a shoulder 22 projects, in head section 20. On the other hand, as illustrated in Figures 1 and 4, the cap 14 for the safety stud assembly comprises a generally cylindrical body with an upper wall 28 having a central circular bore 25 and a circular recess 26 around the body. to perforation 25. Finally, according to Figures 1 and 5, the screw 16 for the safety stud assembly comprises a screw head 30 whose upper face has a recess of geometric or irregular shape 32 that forms a combination or key, in such a way that said screw can be coupled in a threaded form only by the use of a special tool 50, such as that illustrated in Figure 8, containing at its end the negative 52 of the combination or key 32.

Based on the foregoing, referring to Figure 1, the safety stud assembly is formed as a single piece by placing the cap 14 on the head 20 of the stud 12 and threadedly introducing the screw 16 into the threaded bore 13 of the former. Butt head 12. In this way, by placing the safety stud assembly in an automotive unit, the cap 14 prevents that a cross wrench or conventional tool can be used to remove the wheel from the unit. Additionally, the shoulder 22 allows the cap 14 to rotate around the head of the stud 12 when said shoulder 22 acts as a guide and stopper of the cap 14 since the height of the shoulder 22 is greater than the height of the step 31 formed by the shoulder. perforation 25 and the recess 26 of the cap 14, even when the screw 16 is perfectly tightened. In this way, it is avoided that the safety stud assembly of the present invention can be removed from the unit using tools such as pressure clamps or the like. On the other hand, by inserting the screw 16 into the threaded bore 13 of the head of the stud 12, the recess 26 of the cap 14 allows said screw 16 to be completely flush with the upper wall 28 of the cap 14 so that it is also not possible extract the screw 16 by using tools such as pressure clamps or the like, but only with the key 50 of complementary design. In an alternative embodiment, shown in Figures 6 and 7, the safety stud assembly comprises a nut-type stud 36. Unlike the safety stud assembly described above, the nut-type stud 36 is engaged in bolts provided in the dough or drum of the automobile by means of the internal thread 42, however, the characteristics and operation of the safety bolt assembly of this mode are substantially similar to that previously described, since the cap and bolt used in this type of bolts are the same as those of the bolt. previously described for the bolt type bolt.

Claims (6)

1. A safety stud assembly for automotive engine wrenches characterized in that it comprises: a stud body comprising a threaded lower section, a head section, a threaded longitudinal bore in the head section and a circular shoulder projecting from said bore in the upper face of the head section; a cap comprising a generally cylindrical body with an upper wall having a central circular perforation and a circular recess around said perforation; and a screw comprising a head whose upper face has a recess that forms a combination; wherein the cap is placed on the head of the stud body and fastened by inserting the screw into the threaded longitudinal bore of the head section by using a tool containing said combination; and wherein the circular shoulder projecting from said perforation in the upper face of the head section allows the cap to be rotatable about the head section of the stud body even when the screw is perfectly tightened.

2. The safety ring assembly for automotive motorcycles according to claim 1, further characterized in that the lower threaded section of the stud body is configured as a screw that can be coupled to the threaded holes of the mass or drum of the vehicle. an automotive vehicle.

3. The safety ring assembly for automotive engine blocks according to claim 1, further characterized in that the lower section of the stud body comprises an internal thread that can be coupled to threaded projections of the mass or drum of an automotive vehicle. .

4. The safety ring assembly for automotive vehicle wrenches according to claim 1, further characterized in that the head of the screw is completely flush with the upper wall of the cap, fitting within the circular recess of the upper wall of the cap, when said screw is inserted in the circular perforation of the upper wall of the cap and in the threaded longitudinal bore of the head section of the stud body.

5. The safety ring assembly for automotive vehicle wrenches according to claim 1, further characterized in that the recess in the upper face of the head of said screw forming a combination is geometrically shaped.

6. The safety ring assembly for automotive vehicle wrenches according to claim 1, further characterized in that the recess in the upper face of the head of said screw forming a combination is irregularly shaped.