摘要:
A power transmission system including an integrally molded hub and elastic member, where stress is inhibited from concentrating at the gate marks remaining after integral molding. In a pulley driven by a belt, a plastic pulley side relief section 1a provided at a pocket section of the pulley and a plastic hub side relief section provided on an iron outer ring of the hub engaged at the pocket section whereby power is transmitted from the pulley to the shaft. The hub side relief section and outer ring forming parts of the hub, the iron inner hub to be fastened to the shaft, and the plastic cylindrical part are integrally molded so that the gate mark for plastic injection is formed near to or further to the outer circumference of the outer ring.
摘要:
A power transmission system including an integrally molded hub and elastic member, where stress is inhibited from concentrating at the gate marks remaining after integral molding. In a pulley driven by a belt, a plastic pulley side relief section 1a provided at a pocket section of the pulley and a plastic hub side relief section provided on an iron outer ring of the hub engaged at the pocket section whereby power is transmitted from the pulley to the shaft. The hub side relief section and outer ring forming parts of the hub, the iron inner hub to be fastened to the shaft, and the plastic cylindrical part are integrally molded so that the gate mark for plastic injection is formed near to or further to the outer circumference of the outer ring.
摘要:
A power transmission device (10) comprises a rotatable rotary part (1, 2) to which a rotational drive force is transmitted from a drive source and a power transmission shut-off member (3) that shuts off transmission of an excessive torque between the rotary part and a rotating shaft (4) of a device to be driven. The power transmission shut-off member is threadedly coupled to the rotating shaft and can rotate with the rotating shaft. The rotary part is installed so as to be sandwiched between the power transmission shut-off member and the rotating shaft. A disc spring (8), installed between the power transmission shut-off member and the rotary part, is further provided. A caulked part (204a) for preventing a part of the power transmission shut-off member from dropping is provided on the front end side of the rotating shaft.
摘要:
A hub for use in a power transmission apparatus comprises cylindrical portion 81 and outer ring 83 including a plurality of tongue-like reinforcing portions 83c each protruded radially inward from the peripheral end of the corresponding one of the plurality of protrusions 83b. When the distance from point C where the rear-side end surface of the cylindrical portion 81 and hub-side engaging portion 85 are connected with each other, to rear-side end surface D of reinforcing portions 83c is given a, and the distance from rear-side end surface D of reinforcing portions 83c to radially innermost front-side portion E is given b, distance b is less than one half of distance a.
摘要:
In a power transmission 1 in which a pulley 2 and a hub 5 are engaged with each other, in protrusions 51 of the hub 5 side and in protrusions 22 of the pulley 2 side located on an outer circumferential side with respect to an outer hub 53, an annular dust flange 51d is provided which protrudes and expands to the outside in the radial direction from a front side portion which adjoins protrusions 51c of an elastic portion 52. When an outer circumferential end of this dust flange 51d is elastically, tightly contacted with a sealing portion 23 of the pulley 2, a front face of the protrusions 22 can be completely covered.
摘要:
The power transmission device (10) comprises: a rotatable rotary part (1) to which a rotary driving force is transmitted from a driving source; and a power transmission shut-off member (3) for preventing an excessive torque from being transmitted between the rotatable rotary part and a rotating shaft (4) of a driven apparatus and threadedly coupled to the rotating shaft. A hub (2) arranged between the rotary part and the power transmission shut-off member to connect them is located between the power transmission shut-off member and the rotating shaft. The power transmission device further comprises a washer (6) located so as to be sandwiched between the hub and the rotating shaft. The washer is separated from the hub, which is not sandwiched between the washer and an end surface (308) of the power transmission shut-off member near the rotating shaft.
摘要:
A hub for use in a power transmission apparatus comprises cylindrical portion 81 and outer ring 83 including a plurality of tongue-like reinforcing portions 83c each protruded radially inward from the peripheral end of the corresponding one of the plurality of protrusions 83b. When the distance from point C where the rear-side end surface of the cylindrical portion 81 and hub-side engaging portion 85 are connected with each other, to rear-side end surface D of reinforcing portions 83c is given a, and the distance from rear-side end surface D of reinforcing portions 83c to radially innermost front-side portion E is given b, distance b is less than one half of distance a.
摘要:
A power transmission device (10) comprises a rotatable rotary part (1, 2) to which a rotational drive force is transmitted from a drive source and a power transmission shut-off member (3) that shuts off transmission of an excessive torque between the rotary part and a rotating shaft (4) of a device to be driven. The power transmission shut-off member is threadedly coupled to the rotating shaft and can rotate with the rotating shaft. The rotary part is installed so as to be sandwiched between the power transmission shut-off member and the rotating shaft. A disc spring (8), installed between the power transmission shut-off member and the rotary part, is further provided. A caulked part (204a) for preventing a part of the power transmission shut-off member from dropping is provided on the front end side of the rotating shaft.
摘要:
A power transmission device comprises: a pulley 1 pivotally arranged in a casing 9; a hub fixed to a rotary shaft 8; and a torque limiter, having a torque limiting function, for transmitting power between the pulley and the hub and shutting off the transmission of power by breaking a power transmission path in the case where an excessively heavy load is given to the power transmission device. The power transmission device further comprises: a cylindrical member 7 engaged with and fixed to the rotary shaft 8 so that the cylindrical member 7 can be contacted with a hub seating surface 4d; and a seating portion 9c for receiving the cylindrical member, formed in the casing, wherein a gap G is formed between a contact face 7e at the rear end of the cylindrical member and a contact face 9d of the seating portion 9c.
摘要:
Vulcanizing-bonding is carried out using at least a phenolic resin-based vulcanized adhesive F and a silicon compound-based vulcanized adhesive C. Based on an idea of making a penetration of water through a portion bonded with metal difficult, decreasing the adhesion with metal is prevented by utilizing the phenolic resin-based vulcanized adhesive F through which less water can penetrate than the silicon compound-based vulcanized adhesive C, and can increases a thickness of a membrane. Thereby, EPDM or AEM vulcanizable with a peroxide can be strongly bonded to metal, by forming a two-layered structure of the phenolic resin-based vulcanized adhesive F and the silicon compound-based vulcanized adhesive C. Further, a range of selecting a rubber material as an elastic member to be utilized by bonding to metal can be broadened.