JP2005127513A - Chain tension device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chain tension device which can improve a trackability of a chain sliding surface to the chain. <P>SOLUTION: The chain tension device 60 comprises a plurality of members 62, 64, 66 connected pivotably to one another through a hinge 68. Then each upside surface 12i of the members 62, 64, 66 constitutes an upside surface S12i of the whole chain tension device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a chain tensioning device that generates tension in a chain. More particularly, the present invention relates to a chain guide or tensioner arm having a large number of connecting portions. The tensioning device according to a preferred embodiment of the present invention is designed to be used as a chain guide or chain tensioner for an engine timing system.

  In general, an engine timing system consists of a crankshaft and a corresponding sprocket system that drives the engine with a single or two overhead camshafts.

  The operation of the engine timing system is based on an endless loop chain that extends from the crankshaft to the camshaft and back to the crankshaft. The camshaft is rotated by driving the crankshaft and the chain.

  Alternatively, in a double overhead camshaft engine timing system, a separate chain drives between the two camshafts. An example of an engine timing system is shown in US Pat. No. 5,427,580 entitled “Phased Chain Assembly”. The patent is hereby incorporated by reference.

  When a chain extends endlessly between a drive sprocket and a driven sprocket, such as a sprocket located on the crankshaft (drive shaft) and camshaft (driven shaft), the chain has a tension side span and a slack side span ing.

  The tight side span is the result of tension acting on the chain span between the link entering the drive sprocket and the link exiting the driven sprocket. The slack side span occurs in the other span of the chain between the link exiting the drive sprocket and the link entering the driven sprocket.

  The performance and behavior of the chain is different between the tight side and the slack side. Generally, a chain tensioner is used in the slack side span of the chain. The tensioner acts to remove or eliminate the slack of the chain. When the engine is accelerated or decelerated, the tensioner arm approaches the chain so as to maintain chain tension, i.e. to eliminate chain slack.

  The tensioner arm generally has a convex surface that fits the chain travel path. When a chain tensioner is used on the slack side of the chain, the tensioner arm is affected by vibrations and forces resulting from rapid acceleration / deceleration of the engine. Such vibration causes wear on the chain sliding surface of the tensioner arm.

  On the other hand, the chain guide is generally used on the tight side of the chain. Such guides are typically designed to remain stationary when the chain is tensioned between two sprockets. The guide acts to maintain the desired travel path of the chain between the sprockets.

  When a chain guide is used on the tight side of the chain, the chain guide is affected by vibrations and forces resulting from rapid acceleration / deceleration of the engine. Such vibration causes wear on the chain sliding surface of the chain guide.

  In an automobile engine, a blade tensioner is used as a tensioner that applies tension to a drive chain for driving auxiliary equipment such as an engine timing chain and an oil pump. The blade tensioner generally includes a blade shoe having a curved chain sliding surface and a plate spring-like blade spring that is disposed on the opposite side of the chain sliding surface of the blade shoe and applies a spring force to the blade shoe. Yes.

  The base end portion of the blade shoe is supported so as to be rotatable around a support shaft inserted therein. The tip of the blade shoe is slidably supported on a support surface provided separately from the blade shoe.

  During operation, the chain travels along the chain sliding surface of the blade shoe. At this time, the elastic repulsive force generated by the deformation of the blade shoe and the blade spring acts on the chain, and thereby the chain tension is maintained.

  FIG. 1 shows a conventional chain guide with tapered side rails. Here, only a single engine bank in the engine timing system is shown. This engine system includes a crankshaft 20, a sprocket 21 corresponding thereto, a camshaft 30, and a sprocket 31 corresponding thereto. As described above, chain guides are also used in other engine timing systems. The important point is to use the chain guide on the tight side of the endless chain.

  The engine timing system 10 includes a chain 40, a chain tensioner system 50, and a chain guide 1. The chain 40 extends from the crankshaft 20 to the camshaft 30 and returns to the crankshaft 20 so as to be endless. The sprocket 21 is rotated by the rotation of the crankshaft 20, whereby the sprocket 31 and the camshaft 30 are rotated via the chain 40.

  The crank sprocket 21 is a drive sprocket. For this reason, the chain tension side span 43 is formed between a link entering the crank sprocket 21 and a link exiting the cam sprocket 31. The slack side span 41 is formed on the opposite side of the chain tension side span 43 between the two sprockets 21 and 31.

  A chain tensioner system 50 is disposed on the slack side of the chain. The tensioner system 50 is designed to maintain tension on the slack side span of the chain. A chain guide 1 for holding the chain in a predetermined position is disposed on the tension side span 43 of the chain 40.

  The chain guide 1 is arranged so that its upper part 12 abuts on the lower part 42 of the chain 40. The chain 40 is driven by the sprockets 21 and 31, whereby the chain 40 moves in the groove of the chain guide 1 along its traveling direction.

  An example of a blade tensioner is shown in FIG. 1A. The conventional blade tensioner 100 includes a resin blade shoe 101 having a curved chain sliding surface 101a, and a plurality of leaf spring blade springs 102 preferably made of a metal material.

  The blade spring 102 is disposed in a layered manner on the side opposite to the chain sliding surface 101 a of the blade shoe 101. The end of the blade spring 102 is inserted into cut portions 111 and 113 formed in the distal end portion 110 and the proximal end portion 112 of the blade shoe 101, respectively.

  A bracket 120 is provided for mounting the blade tensioner 100 to the engine. Holes 121 and 122 are formed in the bracket 120, and mounting bolts are inserted into these holes.

  The slide surface 125 of the bracket 120 is in contact with the tip portion of the blade shoe 101 to allow the tip portion to slide. The slide surface 125 is formed at the tip of the bracket 120. One end of a pin 130 that rotatably supports the base end portion 112 of the blade shoe 101 is fixed to the center of the bracket 120.

  During operation, the chain continues to run while sliding on the chain sliding surface 101 a of the blade shoe 101. At this time, the pressing load accompanying the change in the shape of the blade shoe 101 and the blade spring 102 acts on the chain, and the chain tension is maintained.

  Similarly, vibration due to chain flapping and tension fluctuation is transmitted from the blade shoe 101 to each blade spring 102. Each blade spring 102 is repeatedly elastically deformed and returned to its original state. At this time, the vibrations of the chain are damped by the adjacent blade springs 102 sliding on each other.

Consideration of the information described in the following US patents, all of which are incorporated herein by reference, is useful for exploring the background of the present invention.
US Pat. No. 5,779,582, named “Chain Guide” with tapered side rails, discloses a chain guide used in the chain tension side span of engine timing systems and designed to reduce the lateral movement of the chain doing.

  This chain guide has a side rail that is tapered inward and rises upward. The groove for guiding and controlling the chain is gradually narrowed towards the center.

  Japanese Patent Laid-Open No. 8-4848 entitled “Tensioner Arm and Chain Guide” discloses a tensioner arm and a chain guide that can prevent deterioration of engine oil characteristics.

  U.S. Pat.No. 6,322,471 entitled `` Chain Guide '' is an angle-shaped tool that is bolted to the installation surface inside the chain and has a single installation that projects outside the chain through the gap between the chain and the installation surface. A chain guide having a guide base is disclosed.

  The shoe support portion of the guide base protrudes perpendicular to the outer protruding end of the installation portion, and has a plurality of nose lock protrusions separated in the chain traveling direction. The guide shoe is provided with a plurality of hook-shaped elastic lock portions protruding from the back surface opposite to the shoe surface. In order to attach the guide shoe to the guide base, the lock portion is engaged with the lock protrusion while the shoe support portion is held between the back surface of the guide shoe and the lock portion.

  The angle-shaped guide base has high rigidity, and therefore vibrations and noises generated during chain travel can be suppressed. The guide base installation does not increase the overall size of the device to which the chain guide is attached. The installation part is arrange | positioned inside the endless chain.

  US Pat. No. 6,312,353 entitled “Chain Guide” describes an elongated chain guide body having one end pivotably connected to a fixed support member and having an opening formed at the other end, and a pivoting movement of the chain guide body. A chain guide that guides the chain is provided with a collar engaged through a gap in the opening so that a clearance is formed between the chain guide body and the chain guide body on the side aligned with the direction of Yes.

  The collar is firmly fixed to the fixed support member so that the chain guide body can pivot within the clearance. With the clearance thus provided, the chain is protected from excessive tension or slack that occurs when the chain guide is attached to the stationary support member.

  US Pat. No. 5,665,019, entitled “Chain Guide Mounting Assembly for Reducing Chain Noise and Vibration in Chain Driven Overhead Cam Internal Combustion Engines,” reduces chain related noise in chain drive overhead cam internal combustion engines. A chain guide mounting assembly is disclosed. This assembly has vibration isolation means for mounting the chain guide on the engine.

  The elastic member mounted in the chain guide isolates the vibration, which reduces unpleasant chain noise. In order to prevent excessive lateral movement acting on the chain guide by the force from the chain, a rigid sleeve is engaged in the hole of the elastic member with an interference fit. For this reason, a preload acts on the elastic member so as to reduce unpleasant lateral momentum.

  EP 1036956, entitled “Mechanical tensioner”, discloses a tensioner having a resin tensioner arm and a torsion coil spring. The tensioner arm is rotatably supported by a bolt fixed to the engine block.

  The torsion coil spring is provided around a flange bolt fixed to the engine block, and urges the tensioner arm so that the tensioner arm swings toward the chain. A metal plate that contacts the leg portion of the torsion coil spring is mounted on the bottom surface of the recess of the tensioner arm. In this tensioner, there are no multiple hinges.

  U.S. Pat. No. 5,720,682, entitled “Tensioner Arm and Chain Guide with Oil Discharge Passage”, discloses a tensioner arm and chain guide each having an oil relief. The oil relief portion is designed to allow drainage of oil that accumulates on the back of the tensioner arm or chain guide.

  The oil escape portion is configured by a through hole in the back surface of the tensioner arm or the chain guide, or a through hole in a side wall disposed on the back surface of the tensioner arm or the chain guide. The tensioner arm or chain guide does not have a large number of hinges.

  Japanese Patent Laid-Open No. 8-4848 entitled “Tensioner Arm and Chain Guide” discloses a tensioner arm and a chain guide that can prevent deterioration of engine oil characteristics.

  In the tensioner arm that applies tension to the timing chain of the engine, a through hole is formed as an oil discharge part for discharging oil accumulated in a recess on the back side of the tensioner arm. This prevents oil from accumulating for a long time on the back surface of the tensioner arm.

All of the above-described conventional techniques have common features. That is, the upper part of the chain guide is formed of a single member, or the upper part of the tensioner arm such as a blade shoe or a chain sliding surface is formed of a single member. Therefore, the chain contact portion of the conventional chain guide or tensioner arm does not have sufficient flexibility to absorb excessive pressing force or rapid vibration from the chain. For this reason, the followability to the movement of the chain is poor. In contrast, the present invention discloses a chain tensioning device such as a chain guide or tensioner arm having an upper portion made up of at least two members.
U.S. Pat.No. 5,427,580 U.S. Pat.No. 5,779,582 JP-A-8-4848 U.S. Pat.No. 6,322,471 U.S. Patent No. 6,312,353 U.S. Pat.No. 5,665,019 European Patent Application No. 1036956 U.S. Pat.No. 5,720,682

  In the chain tensioning device including the chain guide and the tensioner arm, the present invention increases the flexibility of the chain sliding surface by configuring the chain sliding surface in contact with the chain from a plurality of members. An attempt is made to improve the followability of the chain sliding surface to the chain.

  The chain tensioning device according to the first aspect of the present invention comprises a plurality of members that are pivotally connected to each other via hinges, each member having an upper side surface (chain sliding surface), and each upper side surface. Constitutes the upper surface (chain sliding surface) of the chain tensioning device as a whole.

  According to a second aspect of the present invention, in the first aspect of the present invention, the apparatus further includes a connecting member arranged to connect two adjacent members among the members.

  According to a third aspect of the present invention, in the second aspect of the present invention, the connecting member has a pin disposed so as to pass through the annular opening formed in each adjacent member.

  According to a fourth aspect of the present invention, in the third aspect, the connecting member further includes an elastic member associated with the pin in order to maintain the shape and the followability.

  According to a fifth aspect of the present invention, in the first aspect, each member has a first end.

  According to a sixth aspect of the present invention, in the first aspect, each member has a second end.

  In a seventh aspect of the present invention, in the first aspect, the chain tensioning device is a chain guide.

  According to an eighth aspect of the present invention, in the first aspect, the chain tensioning device is a tensioner arm.

  According to the present invention, there is provided a chain tensioning device including a plurality of members hinged to each other. Each member has a surface that constitutes a part of an upper portion (chain sliding portion) of the chain tensioning device. The plurality of members connected to each other constitute an upper portion of the chain tensioning device.

  A chain tensioning device divided into a plurality of parts is provided, each part being hinged to the other part to provide follow-up to the movement of the chain. These hinges are biased by a set of springs that exert a pressing force on the chain.

A chain tensioning device is provided which is divided into a number of parts and has a modular part for a low cost design.
A chain tensioning device is provided which is divided into a number of parts and has a modular part for damping the chain drive.

  There is provided a chain tensioning device having a plurality of members connected to each other via a hinge. Each member has an upper side surface (chain sliding surface) that constitutes an upper side surface (chain sliding surface) of the chain tensioning device. The upper side of each member constitutes the upper side of the chain tensioning device.

  According to the chain tensioning device of the present invention, it is composed of a plurality of members that are pivotally connected to each other via a hinge, and each upper side surface of each member forms an upper side surface of the entire device. Therefore, when an excessive pressing force or sudden vibration is applied from the chain, each member pivots through the hinge, so that the flexibility of the entire device is increased and the followability to the movement of the chain can be improved. It becomes like this.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 2 shows a chain tensioning device 60 such as a chain guide or tensioner arm according to the present invention. The chain tensioning device 60 has a first end 62 and a second end 64.

  The first end 62 has an annular opening 63 for receiving a bolt (not shown) such as a shoulder bolt for allowing a pivoting movement. The second end portion 64 has an elongated opening (long hole) 65, and the opening 65 allows a bolt 67 attached thereto to be smaller than the opening 65.

  Thus, there is play for movement of the chain guide due to the physical shape of the aperture 65, which allows the chain tensioning device 60 to be somewhat self-adjusting as a whole. The chain tensioning device 60 has at least one link 66 as an intermediate portion. Alternatively, the chain guide typically has a plurality of links 66.

  It is noted that the present invention also includes the possibility of having only two parts connected to each other. For example, the chain tensioning device 60 may be composed of only the first end 62 and the second end 64 that are hinged to each other without the link 66 being disposed therebetween.

  Each member 62, 64, 66 is constituted by, for example, steel punching. Alternatively, each member 62, 64, 66 is formed by plastic molding. The members 62, 64, 66 are connected to each other via a hinge 68 so as to be pivotable. Here, a pin 69 is provided as an actual hinge for connecting the members 62, 64, 66.

  Each member 62, 64, 66 has an upper side surface (chain sliding surface) 12i. Here, i is a positive integer, that is, 1, 2,..., N. The upper side surface S12i constituted by each upper side surface 12i forms the upper side surface (chain sliding surface) of the entire chain tensioning device 60, as the upper side surface 12 of FIG. In other words, the chain guide formed by connecting a plurality of portions forms a surface comparable to the conventional upper surface.

  One of the distinguishing features of the present invention compared to the prior art is that a number of parts are connected to form a chain guide. In this way, play for followability via the spring mechanism is achieved. Followability is a negligible change in the shape of the first member that engages the second member.

  The present invention is different from the conventional chain guide in which only one member serves as a number of members. The second distinctive feature of the present invention is that tension is provided in the hinge mechanism to maintain a curved shape.

  In other words, if the flexible chain tensioning device 60 is a tensioner arm, it is configured as follows. That is, the chain tensioning device 60 has a large number of hinges 68. The chain tensioning device 60 has a number of unit members including a first end portion 62, a second end portion 64, and at least one (preferably a plurality of) intermediate links 66. .

  Alternatively, since the first end portion 62 and the second end portion 64 are connected to each other, the link 66 as the intermediate portion may not exist at all. Each member 62, 64, 66 can be made of various materials including steel punched products and resin molded products. The members 62, 64, 66 are connected to each other by a hinge 68 so as to be pivotable.

  The first end 62 has a pivot connection portion such as an opening 63 that is pivotally coupled to a third member (not shown) for installing the chain tensioning device 60. The overlay member 671 or face is mounted on the flexible chain tensioning device 60.

  The overlay member 671 has an inner surface 67a that is in contact with the surface of the chain tensioning device 60 without chemical bonding. The overlay member 671 has an outer surface 67b that contacts a chain (not shown). It is noted that there is a relative movement between the surface of the chain tensioning device 60 and the inner surface 67a.

  For the part produced by stamping steel, the overlay member 671 is typically a resin molded face or shoe required to cover all the upper side S12i. The face is typically composed of a single member.

  FIG. 3 is a bottom view of two adjacent links 66 and shows a hinge 68 connecting the links 66. Note that the hinge 68 between the first end 62 and the link 66 is identical to the hinge 68 between the second end 64 and the link 66.

  The difference is the physical shape of the first and second ends, but each hinge 68 is identical. Similarly, the first end 62 and the second end 64 may be connected to each other by the same hinge as the hinge 68.

  Each link 66 has a pair of overhang portions 72. Each overhang portion 72 forms a side surface of the link 66 and defines an outer boundary of the side surface. The overhang portions 72 are arranged at positions symmetrical to each other with respect to a center line 73 in the longitudinal direction (coincident with the chain traveling direction) of the chain tensioning device 60.

  Each link 66 has two legs 74 that constitute an extension of each overhang 72. Each leg 74 is formed with an annular opening for receiving the pin 69. Each overhang 72 has a bent portion 76 that narrows the link 66. The bent portion 76 facilitates coupling with adjacent links 66 without widening the entire device 60.

  A plate-like back portion 78 that connects these overhang portions 72 is formed between the overhang portions 72. The back portion 78, together with each overhang portion 72, defines a three-dimensional space for accommodating a connecting member such as one or more springs (elastic members) 80.

  The spring 80 is a solid or wound spiral, plate or similar shaped spring that exerts a force to maintain the desired shape. This desired shape is maintained by the followability of the guide.

  The chain tensioning device 60 has followability when a chain that exerts a pressing force on the arm (overlay member) is accommodated. More specifically, with respect to the three-dimensional space, a part of each overhang portion 72 cooperates with the inner surface of the back portion 78 to limit the space. A part of each overhang part 72 includes a part of each leg part 74, and the remaining part of each overhang part 72 includes a bent part 76.

  Each overhang portion 72 is formed with two pairs of openings 82 and 84 for receiving the pins 69. The first opening 82 is formed in the leg portion 74, and the second opening 84 is formed in the opposite end of the overhang portion 72. The opening 82 may be rectangular.

  FIG. 4 is a plan view of two adjacent links 66, and shows a hinge 68 that connects these links 66. The outer surface opposite to the inner surface of the back portion 78 forms the upper surface (chain sliding surface) 12i of the chain tensioning device 60. Since the outer surface of the back part 78 extends over the overhang part 72, it is wider than the inner surface of the back part 78.

  Ideally, each outer surface constitutes a continuous surface, such as surface 12 in FIG. In practice, a gap 92 is formed between adjacent outer surfaces, but it is preferable that this gap 92 is as narrow as possible. Note that providing an appropriate gap also has the advantage that the lubricating oil flows through the gap.

  The physical shapes of the first end 62 and the second end 64 have any suitable shape known in the chain guide art. Typically, this shape is identical to the corresponding part of a known chain guide or tensioner arm made of a single piece.

  In application to a chain drive, it is known that a tensioning device is required to maintain chain tension. The tensioning device 60 includes a number of steel stamped members or resin molded members that are hinged.

  These hinges are assisted by springs that exert a pressing force on the chain. The advantage of the flexible chain tensioning device 60 is that it has a large number of hinges made in a low cost modular design and subject to preload control by springs.

  In addition, the hinge spring is a solid or wound torsion spring, coil spring, leaf spring or other similar spring that exerts a pressing force on the chain. In the case of a steel stamped member, an additional plastic wear surface such as the wear surface (outer surface) 67b of the overlay member 671 of FIG. 2 is required.

  The wear surface is a groove, a series of clips, or a plastic or elastomeric member held on the steel base by a similar method. It is noted that plastic moldings do not require a wear surface. One member of the chain tensioning device 60 provides a pivoting function and is different from the central modular member.

  The end portion has a surface in sliding contact with the surface of the engine block. The advantage of the flexible chain tensioning device 60 with a large number of hinges is that it is a low-cost modular design and is subject to preload control by a spring.

  As will be appreciated, the device 60 has a number of members, from a rigid member comprising a material such as a steel stamped or resin molded article that is hinged to allow changes in shape. It is configured. These hinges 68 are assisted by springs that provide support and followability.

  Furthermore, the present invention provides a compliant chain tensioning device 60 that is modular in construction and thus has low cost design features and provides additional damping for the chain drive.

  FIG. 5 shows a computer model of a followable arm 801 having a connecting portion 821 arranged at a predetermined position. Note that some of the connections 821a are not in direct contact with the chain 841.

  6 and 7 are perspective views of an apparatus according to the present invention. FIG. 6 is a bottom perspective view 200 of an embodiment of the present invention. Each member 62, 64, 66 is connected to each other by a corner pin 69 so as to be pivotable.

  FIG. 7 shows a top perspective view 210 of an embodiment of the present invention. It is noted that each member provides an upper side surface 12i that forms the upper side surface S12i as a whole. There is a gap between each upper side surface 12i.

  An elongated opening 65 is formed in the end portion 64. An annular opening 63 is formed in the end 62. An elastic member may be used as a torsion bar attached to the inside of the chain tensioning device 60 such as a chain guide.

  A chain tensioning device 60, such as a tensioner arm, may have a plastic wear surface that is clipped to an aluminum base. For example, the overlay 671 in FIG. 2 is considered a plastic wear surface.

  The wear surface can be interpreted as the second member. In the present invention, the wear surface is not considered as the second member. This is because, in addition to the wear surface, the present invention has more than one member.

  8 and 9 are perspective views of the device according to the present invention. FIG. 8 shows a plan side perspective view 200a of an embodiment of the present invention. Each member 62, 64, 66 is pivotally connected to each other by a pin 69.

  Each member provides an upper side surface 12i that forms the upper side surface S12i as a whole. There is a gap between each upper side surface 12i. An extended end 65 extends from the end portion 64. An annular opening 63 is formed in the end 62.

  FIG. 9 shows a bottom perspective view 210a of an embodiment of the present invention. It is noted that a torsion spring 280 is mounted between each link of the tensioner arm.

  As described above, according to the chain tensioning device according to the present embodiment, the upper side surface S12i that is the chain sliding surface that comes into contact with the chain is connected to each of the plurality of members 62, 64, and 66 that are pivotally connected to each other. Since the upper side surface 12i is configured, the flexibility of the chain sliding surface can be improved, and thereby the followability of the chain sliding surface to the chain can be improved. As a result, the chain can be reliably controlled and the wear of the chain sliding surface can be reduced.

  It is to be understood that the embodiments of the invention described herein are merely exemplary of applying the principles of the invention. References made in this specification to details of the illustrated embodiments are not intended to limit the scope of the invention described in the claims, but the features of the embodiments are important to the invention. It only explains a point.

1 is a side perspective view of a conventional power transmission chain tensioner system and chain guide used for an engine crankshaft and camshaft. FIG. It is a side view which shows an example of the conventional blade tensioner. FIG. 3 is a side view of chain tensioning devices connected according to the present invention. It is a bottom view of the chain tensioning device according to the present invention. 1 is a partial plan view of a chain tensioning device according to the present invention. FIG. The computer model of the followable arm which has a connection part in a predetermined position is shown. It is a bottom side perspective view of the chain guide by this invention. It is a plane side perspective view of the chain guide by this invention. It is a plane side perspective view of the tensioner arm by this invention. It is a bottom side perspective view of a tensioner arm according to the present invention.

Explanation of symbols

12i: upper side S12i: upper side 60: chain tensioning device 62: first end (member)
64: Second end (member)
66: Link (member)
68: Hinge 69: Pin

Claims (8)

A chain tensioning device 60 comprising:
A plurality of members 62, 64, 66 that are pivotally connected to each other via a hinge 68;
Each member 62, 64, 66 has an upper side surface 12i, and each upper side surface 12i forms the upper side surface of the chain tensioning device 60 as a whole.
A chain tensioning device characterized by that. In claim 1,
A connecting member arranged to connect two adjacent members among the members 62, 64, 66;
A chain tensioning device characterized by that. In claim 2,
The connecting member has a pin 69 arranged so as to be inserted through an annular opening formed in each adjacent member.
A chain tensioning device characterized by that. In claim 3,
The connecting member further includes an elastic member 80 associated with the pin 69 in order to maintain shape and followability.
A chain tensioning device characterized by that. In claim 1,
Each member 62, 64, 66 has a first end 62,
A chain tensioning device characterized by that. In claim 1,
Each member 62, 64, 66 has a second end 64,
A chain tensioning device characterized by that. In claim 1,
The chain tensioning device is a chain guide,
A chain tensioning device characterized by that. In claim 1,
The chain tensioning device is a tensioner arm,
A chain tensioning device characterized by that.

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