Device for fixing vehicle wheels on a wheel-balancing machine

In a device for fixing vehicle wheels having fixing apertures on a balancing machine provided with a rotary shaft, comprising in combination:

• a platen provided in the centre thereof with means for fixing it on said shaft to rotate about the axis thereof and a series of passages respectively having axes parallel to said axis and located at the apices of at least two regular polygons, a set of first means each of which first means comprises a journal adapted to be engaged in one of the passages of the platen and a fixing stud which is eccentric with respect to said journal, and drive means for simultaneously driving all of said first means so as to rotate, by the rotation of one of the first means, all the other first means, whereby the studs of the first means are located at a distance from the centre of the platen equal to the distance between the fixing apertures of the wheel to be balanced and the centre of said wheel;
• the improvement comprising arranging that one of said passages is coaxial with an apex which is common to all the polygons and said passages are all located on the same circumference of the platen, said means for driving said first means comprising a centre driving element mounted to be rotatable about said axis, and a positive mechanical connecting device being capable of coupling said driving element to each one of said first means, said positive mechanical connecting device comprising peripheral teeth on the driving element and complementary teeth on each one of said first means and meshing with the peripheral teeth, the number of teeth of the driving element being a common multiple of the numbers of angles of said polygons.

In a device for fixing vehicle wheels having fixing apertures on a balancing machine provided with a rotary shaft, comprising in combination:

• a platen provided in the centre thereof with means for fixing it on said shaft to rotate about the axis thereof and a series of passages respectively having axes parallel to said axis and located at the apices of at least two regular polygons, a set of first means each of which first means comprises a journal adapted to be engaged in one of the passages of the platen and a fixing stud which is eccentric with respect to said journal, and drive means for simultaneously driving all of said first means so as to rotate, by the rotation of one of the first means, all the other first means, whereby the studs of the first means are located at a distance from the centre of the platen equal to the distance between the fixing apertures of the wheel to be balanced and the centre of said wheel;
• the improvement comprising arranging that one of said passages is coaxial with an apex common to all the polygons and said passages are all located on the same circumference of the platen, said means for driving said first means comprising a centre driving element mounted to be rotatable about said axis, and a positive mechanical connecting device being capable of coupling said driving element to each one of said first means, said positive mechanical connecting device comprising peripheral teeth on the driving element and complementary teeth on each one of said first means and meshing with the peripheral teeth, each first means comprising a plate on which said journal and said stud are fixed in a manner to extend in parallel opposed directions and a gear wheel which is coaxial with the axis of the journal, meshes with the centre driving element and is integral with the plate, the plate being located at a different level with respect to said driving element and its associated gear wheel, said device further comprising on said centre driving element a circular abutment which is coaxial with said driving element and disposed at the same level as said plate in the mounted position of each one of said first means.

In a device for fixing vehicle wheels having fixing apertures on a balancing machine provided with a rotary shaft, comprising in combination:

• a platen provided in the centre thereof with means for fixing it on said shaft to rotate about the axis thereof an a series of passages respectively having axes parallel to said axis and located at the apices of at least two regular polygons, a set of first means each of which first means comprises a journal adapted to be engaged in one of the passages of the platen and a fixing stud which is eccentric with respect to said journal, and drive means for simultaneously driving all of said first means so as to rotate, by the rotation of one of the first means, all the other first means, whereby the studs of the first means are located at a distance from the centre of the platen equal to the distance between the fixing apertures of the wheel to be balanced and the centre of said wheel;
• the improvement comprising arranging that one of said passages is coaxial with an apex common to all the polygons and said passages are all located on the same circumference of the platen, said means for driving said first means comprising a centre driving element mounted to be rotatable about said axis, and a positive mechanical connecting device being capable of coupling said driving element to each one of said first means, said positive mechanical connecting device comprising a centre driving element constituted by a disc provided with radial notches disposed at angular distances apart of the passages of said platen, and each of said first means comprises a driving pin which is offset with respect to the journal of said first means and parallel thereto.