Toyoda Gosei Co., Ltd.

Satomi Watanabe

Masato Ueno

Kazutoshi Miyake

Takeshi Miyazaki

Nobuaki Funahashi

Tomohito Asai

Akira Mabuchi

Hideyuki Imai

Kanae Matsumura

Katsuya Hadano

Hiroshi Yokoi

Kazuya Ito

Kyouichi Fujinami

Takayoshi Iwata

Thoru Isono

Yutaka Ito

Toshikazu Amano

The present invention is directed to a vibration insulating assembly including a rubber vibration insulator and metallic members bonded thereto. In particular, the present invention relates to a method for manufacturing the same, by which the quality of the resulting assembly is improved by providing a high bonding strength between the vibration insulator and metallic members. Retainers are provided about the peripheries of the bonding surfaces of the rubber vibration insulator in order to restrict displacement and deformation of the rubber vibration insulator across the bonding surfaces or at the bonding interface with the metallic members and to facilitate its positioning. The presence of the retainers allows for the application of a predetermined pressure on the bonding surfaces to enhance the bonding strength while preventing an undesirable strain from forming in the bonding surface of the rubber vibration insulator. At least one and preferably a plurality of grains or recessed portions are preferably formed in the bonding surfaces of the rubber vibration insulator to be bonded to the metallic members. An adhesive, which is preferably solvent-free, is applied to these bonding surfaces to effect bonding.

Vibration insulating assembly and method for making the same

A lightweight damper pulley is provided which can be produced in a simple manner. The damper pulley includes a central portion, a belt retaining portion made of metal plate, and a ring-shaped rubber or elastic member placed therebetween. The central portion includes a cylindrical boss portion to be fixed onto a rotary shaft, a main portion extending radially outwardly from the larger diameter area of the cylindrical boss portion, and a flange bent horizontally from an outer periphery of the main portion. The central portion is integrally formed from a metal plate by press-forming or the like. The flange and the belt retaining portion can have projections which compress the rubber or elastic member to hold it securely in place.

Damper pulley

A method for producing a damper pulley having a boss portion to be press-fitted onto a rotary shaft, an annular main portion extending from the boss portion, a flange portion formed along an outer periphery of the main portion, a ring-shaped damper-mass member located outside the flange portion and a rubber body interposed between the flange portion and the damper-mass member includes the steps of integrally forming the boss portion, the main portion and the flange portion of a metallic plate such that the main portion has a curved section, and has a radial length greater than a straight line distance between the boss portion and the flange portion, placing the rubber body between the flange portion and the damper-mass member, and enlarging the diameter of the flange portion to elongate the main portion having a curved section, thereby the enlarged flange portion presses the rubber body against the damper-mass member.

Method for producing damper pulley

A lightweight pulley is provided which can be produced in a simple manner at low cost. The pulley has a cylindrical boss portion, an annular main portion which extends radially outwardly from the cylindrical boss portion, and a ring-shaped belt retaining portion. The boss portion and the main portion are integrally formed from a thin metal plate by press-forming, thereby reducing the weight of the pulley, and facilitating the production thereof. The peripheral wall of the boss portion is alternately bent inwardly and outwardly in its peripheral direction to form a plurality of ribs, thus increasing the strength of the boss portion. A method of manufacturing the pulley is also provided.

Press-formed pulley

A cylindrical damping bushing for securing a rod-shaped vibrating body to a base. The bushing includes a cylindrical vibration-damping rubber body having an inner bore through which the vibrating body is inserted. An upper side surface thereof comes into contact with the base while the remaining outer side surface thereof is retained by a bracket which is secured to the base. First and second insert members, each having a rigidity greater than that of rubber, are respectively embedded in the axially central portion of the rubber body, except for both axial end portions thereof, in symmetric relation with each other with respect to the inner bore of the rubber body. The first insert member has a flat upper surface and an arc-shaped lower surface. The flat upper surface of the first insert member is flush with the upper side surface of the rubber body while the arc-shaped lower surface thereof is close to the inner bore within a predetermined interval. The second insert member has a sheet-like configuration of an arc-shaped cross section. The lower surface of the second insert member is flush with the lower side surface of the rubber body while the upper surface thereof is close to the inner bore within a predetermined interval.

Cylindrical damping bushing

Growing community of inventors

Inazawa, Japan

Satomi Watanabe