Tsubakimoto Chain Company

Asahi Kasei Chemicals Corporation

IP Co., Ltd.

Tsubakimoto Chainco.

Masahiko Konno

Kaori Mori

Yuji Kurematsu

Kozo Inoue

Akira Kobara

Toshifumi Satoh

Koichi Shimosaka

Hiroshi Hashimoto

Tatsuya Konishi

Yuichiro Ishikawa

Hiroshi Horie

Munehiro Maeda

Masato Tomobuchi

Manabu Hirayama

Shoichiro Shimizu

Shuuji Matsumura

Masaru Kanamori

Ryo Segawa

Tatsumi Murohoshi

Sadayuki Nagatomo

Sadahiko Yamaguchi

To provide a tensioner unit, a rocking lever, and a tensioner, which, prevent breakage of the tensioner in use for a prolonged period of time. A protruding part is provided to a rocking lever near an abutment surface for abutment with a plunger to make contact with a tensioner body. h and H satisfy the relationship of h&#x3c;H, where h denotes a protruding amount of a lead part of the plunger, where the lead part means a part protruding from the plunger bore, from a tip end surface on an opened side of the tensioner body in a state where the plunger sits on a bottom of the plunger bore, and H denotes an interval between the abutment surface of the rocking lever and the tip end surface of the tensioner body when the protruding part is brought into contact with the tensioner body.

Tensioner unit, rocking lever, and tensioner

An object of the present invention is to provide a chain tensioner that can prevent breakage or deformation of its components during transport or storage, prevent wrong assembly, and increase the degree of design freedom. The chain tensioner includes a guide lever supported pivotably on an arm part that is provided to a tensioner body. The tensioner body has a body-side fixing pin hole positioned for a stopper pin to pass through without extending through the plunger. The guide lever has a lever-side fixing pin hole that comes to be coaxial with the body-side fixing pin hole in a predetermined pivoting position.

Chain tensioner and tensioner body

An object of the present invention is to provide a chain guide, which allows easy assembling of a guide shoe to a base member, and reliably prevents detachment of the guide shoe from the base member resulting from vibration or the like during the running of a chain. Provided is a chain guide wherein a base member includes an attachment extension extending upward from a base body part beyond a support surface, and a base-side engaged part formed in the attachment extension, a guide shoe includes a flexible extension extending from a shoe body part, and a shoe-side engaging part formed in the flexible extension, and the shoe-side engaging part is hooked to the base-side engaged part from below, or diagonally from below, or from front or back, to be positioned on the far side of the base-side engaged part during engagement therebetween.

Chain guide

An object of the present invention is to provide a chain and a chain transmission device capable of reducing sliding resistance of the chain to a guide lip portion and stably maintaining an oil film between the guide lip portion and an outer plate. Provided is a chainwherein a plurality of link platesandinclude outer plates, each of the outer plateshas a pair of front and rear pin holesinto which connecting pinsare inserted, a guide-side end surfacethat faces a traveling guide surfaceside of a chain guide, and a contact convex portionthat protrudes from an outer surface of the outer plate, and the contact convex portionis formed in an area between the pin holesand the guide-side end surfacein a plate height direction.

Chain and chain transmission device

The present invention provides a toothed belt transmission that reduces noise and vibration resulting from the engagement between a toothed belt and a toothed pulley, and that improves the durability of the toothed belt. The toothed belt transmission in which a tooth height of a toothed belt and a tooth height of a toothed pulley are set so that when the toothed belt and the toothed pulley start engaging with each other, tooth tip parts of the toothed belt and tooth bottom parts of the toothed pulley contact each other before tooth bottom parts of the toothed belt and tooth tip parts of the toothed pulley contact each other.

Toothed belt transmission

Provided is a chain guide and a chain transmission that can reduce sliding resistance between the chain and guide lips, and can maintain a consistent oil film between the guide lips and outer plates. Guide lips each include a first contact convex portion formed on an upstream end in a chain running direction, and a second contact convex portion formed downstream of the first contact convex portion. The first contact convex portion includes a first peak and a first upstream slope formed upstream of the first peak. The second contact convex portion includes a second peak and a second upstream slope formed upstream of the second peak. The dimension in the chain running direction from an upstream end of a guide rail surface to the first peak is set smaller than a chain pitch.

Chain guide and chain transmission

An object of the present invention is to provide a chain drive system that can reduce sliding resistance between a chain and a guide shoe, minimize increase of sliding resistance over time, and reduce production cost. Provided is a chain drive systemincluding a plurality of sprocketsandover which a chainpasses over, and one or more guidesandthat guide the chain. The guidesandinclude integral or separate guide shoesandeach having a chain running surface. The chain running surfaces include, in part thereof, a lubricated areawhere a solid lubricant P is held.

Chain drive system

An object of the present invention is to provide a chain and a chain transmission device capable of reducing sliding resistance of the chain to a guide lip portion and stably maintaining an oil film between the guide lip portion and an outer plate. Provided is a chainwherein a plurality of link platesandinclude outer plates, each of the outer plateshas a pair of front and rear pin holesinto which connecting pinsare inserted, a guide-side end surfacethat faces the side of a traveling guide surfaceof a chain guide, and a concave portionthat is formed in an outer surface of the outer plate, and the concave portionis formed in an area between the pin holesand the guide-side end surfacein a plate height direction.

A guide shoe is provided, which exhibits a lower level of slide resistance between a chain and a slide surface at the time of the sliding of the chain, is able to keep a sufficient lubricant on the slide surface even at the time of the starting of an engine, and produces less noise and wear. The guide shoe includes: a slide surface that slidably guides a link plate of a traveling chain; and a plurality of guide protrusions provided on the slide surface, the guide protrusions protruding in a vertical direction from the slide surface, wherein each of front surfaces of the guide protrusions is formed to have a convex curved surface at least from a part thereof on an upstream side to a top part thereof in a chain traveling direction.

Guide shoe

An object of the present invention is to provide a chain drive device that guides a chain favorably with a chain guide to prevent noise generation and wear or damage of various parts with a simple structure, and to provide the chain guide. Provided is a chain drive devicehaving a guide shoethat includes a shoe surface partand a lip. The shoe surface parthas a larger widthwise dimension than that of the chain. The liphas a front-side lip endwhich has a lip front end facethat faces the front side in the chain running direction. The lip front end facehas a height that is set larger than a dimensional difference in backside height between inner platesand outer plates

Chain drive device and chain guide

The present invention provides a highly durable chain guide which is simply configured, easy to assemble, and low in material cost, and in which vibration and tilting are suppressed, enabling reductions in noise, wear, breakage, and so on. A guide shoe includes a plate housing portion which is formed on a rear surface side of a travel guiding portion, and into which a plate can be inserted from below, and in at least one location of an attachment portion or a tensioner contact portion, the plate housing portion constitutes a plate end holding portion formed to be capable of supporting an end portion of the plate from below such that the plate can be inserted therein from a direction other than from below.

There is provided a chain guide capable of preventing a reduction in the durability of the chain guide. In the chain guide in which a base and a shoe are assembled together, a shoe protruding strip formed on a back surface of the shoe is engaged with a base groove that is formed in the base and continuously extends in a longitudinal direction so as to be movable in the longitudinal direction with respect to the base when the shoe expands or contracts, and be able to restrict the movement of the shoe in first and second width directions.

A chain guide is provided in which durability is increased, weight can be reduced, material cost is reduced, the uniformity of resin orientation is improved, dimensional errors, errors in shape, internal strains, and defects are reduced, and bending rigidity such as rigidity against deflection and torsion is augmented with a simple configuration. The chain guide is provided with reinforcing ribs at a guide main body. The reinforcing ribs include first inclined reinforcing ribs and second inclined reinforcing ribs that cross each other. A zone in which the reinforcing ribs are not present is provided in the intermediate portion between two support porting.

A transmission guide comprises a synthetic resin shoe supported by and integrally molded with a synthetic resin base by two-part molding. A guide length retaining mechanism, which can be formed by one or more protrusions on the back of the shoe and one or more cooperating recesses on the supporting surface of the base, retains the shoe against longitudinal movement relative to the base. A guide width retaining mechanism, which can be formed by projections on the edges of the shoe and cooperating holes formed in side walls extending from the supporting surface of the base, retains the shoe against widthwise movement relative to the base.

Transmission guide

The synthetic resin guide in accordance with the invention comprises an elongated synthetic resin shoe having a front surface for sliding contact with the transmission medium and a back surface opposite from the front surface and a plurality of engaging members disposed in longitudinally spaced relationship to one another. The guide also comprises an elongated synthetic resin base in contact with the back surface of the shoe and supporting the shoe, the base having a plurality of longitudinally spaced engaged portions each of which engages with one of the engaging members. One engaging member is fixed to the engaged portion with which it is engaged. The other engaging members are longitudinally movable relative to the engaged portions with which they are engaged. Thus, the guide allows longitudinal thermal expansion and contraction of the shoe relative to the base.

Growing community of inventors

Osaka, Japan

Masahiko Konno