WO2023166955A1 - Transmission à variation continue - Google Patents

Transmission à variation continue Download PDF

Info

Publication number
WO2023166955A1
WO2023166955A1 PCT/JP2023/004614 JP2023004614W WO2023166955A1 WO 2023166955 A1 WO2023166955 A1 WO 2023166955A1 JP 2023004614 W JP2023004614 W JP 2023004614W WO 2023166955 A1 WO2023166955 A1 WO 2023166955A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive pulley
weight
movable drive
lamp
movable
Prior art date
Application number
PCT/JP2023/004614
Other languages
English (en)
Japanese (ja)
Inventor
諭 川頭
克 吉本
友太 横道
Original Assignee
株式会社エフ・シー・シー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社エフ・シー・シー filed Critical 株式会社エフ・シー・シー
Publication of WO2023166955A1 publication Critical patent/WO2023166955A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
    • F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
    • F16H9/16—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
    • F16H9/18—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts only one flange of each pulley being adjustable

Definitions

  • the present invention relates to a continuously variable transmission that continuously transmits rotational driving force of a power source such as an engine to a clutch.
  • a continuously variable transmission that continuously transmits the rotational driving force of a power source (for example, an engine) of a straddle-type vehicle such as a motorcycle to a clutch.
  • a power source for example, an engine
  • a straddle-type vehicle such as a motorcycle
  • a clutch for example, a clutch
  • a ramp plate that rotates by the rotational driving force of an engine, a movable sheave that rotates in synchronization with the ramp plate (hereinafter referred to as a movable drive pulley), and a structure between the ramp plate and the movable drive pulley are disclosed.
  • a continuously variable transmission is disclosed having radially disposed and radially moving centrifugal weights.
  • the V-belt slides on the movable drive pulley, so the movable drive pulley is heated.
  • the ramp plate is arranged to cover the movable drive pulley regardless of the position of the centrifugal weight. That is, the accommodating portion that accommodates the centrifugal weight is covered with the ramp plate. As a result, heat remains between the ramp plate and the movable drive pulley, and heat cannot be dissipated from the movable drive pulley.
  • the temperature of the movable drive pulley rises, the wear of the V-belt is accelerated, and there is a problem that the life of the V-belt is shortened.
  • the present invention has been made in view of this point, and its object is to provide a continuously variable transmission excellent in cooling the movable drive pulley.
  • a continuously variable transmission comprises: a fixed drive pulley that rotates integrally with a crankshaft that is driven to rotate by a power source; a drive pulley having a movable drive pulley approaching or spaced apart from, and a ramp plate disposed on the opposite side of the movable drive pulley from the fixed drive pulley and integrally rotatably driven with the crankshaft; and a weight sandwiched between the movable drive pulley and the ramp plate and movable in the radial direction of the movable drive pulley, wherein the weight moves in the radial direction due to centrifugal force accompanying rotation of the movable drive pulley.
  • the weight is configured to move from an inner position to the radially outer position to press the movable drive pulley to bring the movable drive pulley closer to the fixed drive pulley, wherein the weight is positioned radially outward.
  • a through hole penetrating in the radial direction is formed between the ramp plate and the movable drive pulley when viewed from the radial direction of the crankshaft.
  • the continuously variable transmission of the present invention when the weight is positioned radially outward, a through hole is formed between the ramp plate and the movable drive pulley in the radial direction when viewed from the radial direction of the crankshaft. It is Therefore, when the weight is positioned radially outward, air flows through the through holes between the movable drive pulley and the ramp plate, thereby cooling the movable drive pulley. In this manner, since air can flow between the movable drive pulley and the ramp plate through the through hole, the movable drive pulley can be effectively cooled.
  • FIG. 1 is a cross-sectional view schematically showing configurations of a continuously variable transmission and a centrifugal clutch according to one embodiment.
  • FIG. 2 is an enlarged cross-sectional view showing an enlarged part of the continuously variable transmission according to one embodiment.
  • FIG. 3 is an assembly perspective view showing an assembly state of the sleeve bearing, movable drive pulley, weight, and ramp plate of the continuously variable transmission according to one embodiment.
  • FIG. 4 is an exploded perspective view of a fixed drive pulley, a sleeve bearing, a movable drive pulley, a weight, and a ramp plate of a continuously variable transmission according to one embodiment.
  • FIG. 1 is a cross-sectional view schematically showing configurations of a continuously variable transmission and a centrifugal clutch according to one embodiment.
  • FIG. 2 is an enlarged cross-sectional view showing an enlarged part of the continuously variable transmission according to one embodiment.
  • FIG. 3 is an assembly perspective view showing an assembly state of the sle
  • FIG. 5 is an enlarged cross-sectional view showing a state in which the continuously variable transmission according to one embodiment is rotationally driven at a high rotational speed.
  • FIG. 6 is a perspective view of a movable drive pulley of a continuously variable transmission according to one embodiment;
  • FIG. 7A is a perspective view of a weight according to one embodiment;
  • FIG. 7B is a perspective view of a body cover according to one embodiment;
  • FIG. 7C is a perspective view of a weight body according to one embodiment.
  • 8A is a perspective view of a ramp plate of a continuously variable transmission according to one embodiment;
  • FIG. FIG. 8B is a plan view of a ramp plate of a continuously variable transmission according to one embodiment;
  • FIG. 9 is a plan view showing a state in which the lamp-side protruding piece according to the embodiment abuts on the weight and the weight abuts on the weight receiving portion.
  • FIG. 10 is a plan view showing the relationship between the lamp-side projecting piece, the weight, and the weight receiving portion when the engine is stopped.
  • FIG. 11 is a plan view showing another relationship between the lamp-side protruding piece, the weight, and the weight receiving portion when the engine is stopped.
  • FIG. 12 is a plan view showing a state in which the weight according to one embodiment has moved to a radially outer position.
  • FIG. 13 is a perspective view showing an assembled state of a ramp plate and a movable drive pulley according to one embodiment.
  • FIG. 14 is a plan view showing an assembled state of the ramp plate and the movable drive pulley according to one embodiment.
  • FIG. 15 is a side view showing the positional relationship between the ramp plate and the movable drive pulley when the weight according to one embodiment is positioned radially outward.
  • FIG. 16 is a side view showing the positional relationship between the ramp plate and the movable drive pulley when the weight according to one embodiment is positioned radially inward.
  • FIG. 17 is a plan view showing part of a modification of the movable drive pulley.
  • the continuously variable transmission 100 is a device that is mainly used for straddle-type vehicles (for example, motorcycles such as scooters). As shown in FIG. 1, a continuously variable transmission 100 is provided between a power source (for example, an engine) and a centrifugal clutch 200 on the rear wheel side, which is a drive wheel. Continuously variable transmission 100 transmits rotational driving force to centrifugal clutch 200 while steplessly changing a reduction ratio with respect to engine speed.
  • a power source for example, an engine
  • a centrifugal clutch 200 on the rear wheel side, which is a drive wheel.
  • Continuously variable transmission 100 transmits rotational driving force to centrifugal clutch 200 while steplessly changing a reduction ratio with respect to engine speed.
  • continuously variable transmission 100 includes drive pulley 101 , weight 120 , ramp plate 130 , V-belt 140 and driven pulley 150 .
  • the drive pulley 101 is provided on a crankshaft 90 that is rotationally driven by the engine.
  • the drive pulley 101 is a component that is directly rotationally driven by the rotational driving force of the engine.
  • the drive pulley 101 has a fixed drive pulley 102 and a movable drive pulley 110 arranged opposite the fixed drive pulley 102 .
  • the direction in which the fixed drive pulley 102, the movable drive pulley 110, and the ramp plate 130 rotate is referred to as the rotation direction L (see FIG. 6, etc.).
  • the fixed drive pulley 102 is a component that sandwiches the V-belt 140 together with the movable drive pulley 110 and drives it to rotate.
  • the fixed drive pulley 102 is configured by forming a metal material (for example, an aluminum material) into a conical cylindrical shape.
  • Fixed drive pulley 102 comprises a disc portion 103 , a conical portion 106 and fins 107 .
  • the disc portion 103 is a portion that connects the fixed drive pulley 102 to the crankshaft 90 and supports the conical portion 106 .
  • the disc portion 103 is a flat plate formed in a ring shape.
  • a fitting hole 103a having an internal spline is formed in the center of the disk portion 103 .
  • the outer peripheral portion of the crankshaft 90 is spline-fitted into the fitting hole 103a.
  • the disk portion 103 is fixed on the crankshaft 90 while being abutted against a sleeve bearing 104 fixedly fitted to the outer peripheral portion of the crankshaft 90 .
  • the disk portion 103 is fixed on the crankshaft 90 by a nut 105 that is screwed onto one end (the left side in the drawing) of the crankshaft 90 .
  • the fixed drive pulley 102 is always rotated integrally with the crankshaft 90 .
  • the conical portion 106 is a portion that sandwiches the V-belt 140 together with the conical portion 112 of the movable drive pulley 110 .
  • the conical portion 106 is formed in a tapered surface that slopes outward in the radial direction of the disc portion 103 .
  • Conical portion 106 is slanted away from movable drive pulley 110 as it moves away from disk portion 103 .
  • Conical portion 106 has a plurality of fins 107 formed on the surface opposite to the surface facing movable drive pulley 110 .
  • the fins 107 are members for releasing the heat of the fixed drive pulley 102 to the outside.
  • the fins 107 are radially provided around the axis of the crankshaft 90 on the outer side of the disc portion 103 .
  • the disc portion 103, the conical portion 106 and the fins 107 are integrally molded.
  • the movable drive pulley 110 is a component that sandwiches the V-belt 140 together with the fixed drive pulley 102 and drives it to rotate.
  • the movable drive pulley 110 is configured by forming a metal material into a conical cylinder.
  • the movable drive pulley 110 has a center tubular portion 111, a conical portion 112, a housing portion 113, an outer peripheral wall 118 (see FIG. 6), and side walls 119 (see FIG. 6).
  • the center tubular portion 111 is a portion where the movable drive pulley 110 is supported on the crankshaft 90 .
  • the center tubular portion 111 is a substantially tubular wall projecting from the conical portion 112 .
  • Center tube portion 111 extends from conical portion 112 toward lamp plate 130 .
  • the center tubular portion 111 is formed in the center of the conical portion 112 .
  • the center tubular portion 111 partitions the accommodating portion 113 .
  • a through hole 111W into which the sleeve bearing 104 is inserted is formed in the center tubular portion 111 .
  • the center cylindrical portion 111 is mounted on the sleeve bearing 104 via an impregnated bush.
  • the center tubular portion 111 is attached to the sleeve bearing 104 so as to be slidable in the axial direction and the rotational direction L, respectively.
  • the center tubular portion 111 slides along the crankshaft 90 .
  • the movable drive pulley 110 is slidably supported along the axial direction and the rotational direction L of the crankshaft 90, as shown in FIG.
  • Movable drive pulley 110 is configured to move toward or away from fixed drive pulley 102 on crankshaft 90 .
  • Movable drive pulley 110 is configured to move toward or away from ramp plate 130 on crankshaft 90 .
  • the direction in which the movable drive pulley 110 moves away from the ramp plate 130 is defined as a first direction D1
  • the direction in which the movable drive pulley 110 approaches the ramp plate 130 is defined as a second direction D2.
  • the conical portion 112 is a portion that sandwiches the V-belt 140 together with the conical portion 106 of the fixed drive pulley 102 .
  • the conical portion 112 is formed in a tapered surface that slopes outward in the radial direction of the center cylindrical portion 111 .
  • the cone 112 slopes away from the fixed drive pulley 102 as it moves away from the crankshaft 90 .
  • the conical portion 112 has a receiving portion 113 formed on the surface opposite to the surface facing the fixed drive pulley 102 .
  • the outer peripheral wall 118 is a wall protruding from the conical portion 112 .
  • a peripheral wall 118 extends from the conical portion 112 toward the lamp plate 130 .
  • the outer peripheral wall 118 is located radially outside the center tubular portion 111 .
  • the outer peripheral wall 118 is formed in an annular shape. Note that the shape of the outer peripheral wall 118 is not limited to an annular shape. As will be described later, the outer peripheral wall 118 partitions the housing portion 113 .
  • the movable drive pulley 110 has a plurality of first recesses 118D and a plurality of second recesses 118H.
  • the first recess 118D is an example of a recess.
  • the second recess 118H is an example of another recess.
  • the first recess 118D is formed in the outer peripheral wall 118.
  • the first recessed portion 118D is recessed in the first direction D1 from the end surface 118T of the portion of the outer peripheral wall 118 that defines the housing portion 113 in the second direction D2.
  • the end face 118T in the second direction D2 is also the end in the second direction D2.
  • the first concave portion 118D is located between adjacent accommodating portions 113 with respect to the rotational direction L of the movable drive pulley 110 (conical portion 112).
  • Three first recesses 118D are formed along the rotation direction L at equal intervals.
  • the three first recesses 118D are formed in the same shape.
  • the second recess 118H is formed in the outer peripheral wall 118. As shown in FIG. The second recessed portion 118H is located radially outside the accommodating portion 113 . The second recess 118H is recessed radially inward. The second recessed portion 118H extends from the end surface 118T of the outer peripheral wall 118 in the second direction D2 to the conical portion 112 . The second recess 118H is positioned radially outside the movable drive pulley-side weight sliding surface 114 . The second recessed portion 118H is positioned radially inward of an outer side surface 116b of the projecting piece accommodating portion 116, which will be described later.
  • the movable drive pulley 110 has a plurality of internal spaces 118S.
  • the internal space 118S communicates with the first recess 118D.
  • the internal space 118S is positioned radially inward of the first recess 118D.
  • the internal space 118 ⁇ /b>S is located between the side wall 119 that defines one of the housing portions 113 adjacent in the rotation direction L and the side wall 119 that defines the other housing portion 113 .
  • the internal space 118S is defined by the side wall 119 and the conical portion 112.
  • Three internal spaces 118S are formed along the rotation direction L at equal intervals.
  • the three internal spaces 118S are formed in the same shape.
  • the length L1 of the internal space 118S in the rotation direction L is longer than the length L2 of the housing portion 113 in the rotation direction L.
  • FIG. 12 the length L1 of the internal space 118S in the rotation direction L is longer than the length L2 of the housing portion 113 in the rotation direction L.
  • the sidewall 119 is a wall protruding from the conical portion 112 .
  • Sidewall 119 extends from cone 112 toward lamp plate 130 .
  • Side wall 119 connects center cylindrical portion 111 and outer peripheral wall 118 .
  • Side wall 119 extends in a direction intersecting with rotation direction L.
  • the conical portion 112 is provided with three pairs of sidewalls 119 (ie, six sidewalls 119). As will be described later, the pair of side walls 119 partition the housing portion 113 .
  • the end surface 111T of the center tubular portion 111 in the second direction D2, the end surface 119T of the side wall 119 in the second direction D2, and the end surface 118T of the outer peripheral wall 118 in the second direction D2 are formed flush with each other.
  • the accommodation portion 113 is a portion that movably accommodates the weight 120 and a lamp-side protruding piece 133 of the lamp plate 130, which will be described later.
  • the accommodating portion 113 is formed to be recessed in a state of protruding from the board surface of the conical portion 112 .
  • the accommodating portion 113 is formed between the center tubular portion 111 and the outer peripheral wall 118 .
  • the accommodating portion 113 is formed by being partitioned into a center tubular portion 111 , a pair of side walls 119 and an outer peripheral wall 118 .
  • three accommodating portions 113 are formed at equal intervals along the rotation direction L of the conical portion 112 .
  • the three housing portions 113 are formed in the same shape.
  • the accommodating portion 113 includes a movable drive pulley side weight sliding surface 114 , a weight receiving portion 115 , a projecting piece accommodating portion 116 and a projecting piece receiving portion 117 .
  • the movable drive pulley-side weight sliding surface 114 is a surface that sandwiches the weight 120 in a radially movable state together with a later-described ramp-side weight sliding surface 132 of the ramp plate 130 .
  • a weight 120 slides on the movable drive pulley-side weight sliding surface 114 .
  • the movable drive pulley-side weight sliding surface 114 extends radially.
  • the movable drive pulley-side weight sliding surface 114 is a smooth surface extending in the radial direction.
  • the movable drive pulley-side weight sliding surface 114 is inclined such that the radially outer portion is positioned closer to the ramp plate 130 than the radially inner portion.
  • the movable drive pulley-side weight sliding surface 114 includes a planar portion 114a positioned radially inward and formed in a planar shape, and a curved surface portion 114b positioned radially outward and formed in a curved shape. .
  • the flat portion 114a and the curved portion 114b are continuous in the radial direction.
  • the weight receiving portion 115 receives the first end portion 122c (see FIG. 4) of the weight 120 arranged on the movable drive pulley side weight sliding surface 114, and applies the rotational driving force of the ramp plate 130. As shown in FIG. This is the part that receives The weight receiving portion 115 is formed on the side wall 119 .
  • the weight receiving portion 115 is formed at a position adjacent to the movable drive pulley side weight sliding surface 114 with respect to the rotation direction L. As shown in FIG.
  • the weight receiving portion 115 is positioned downstream in the rotational direction L from the movable drive pulley side weight sliding surface 114 .
  • the weight receiving portion 115 is a surface extending in a direction intersecting the rotational direction L of the movable drive pulley 110 .
  • the projecting piece accommodating portion 116 is a portion that accommodates a lamp-side projecting piece 133 (see FIG. 8A) of the lamp plate 130, which will be described later.
  • the protruding piece accommodating portion 116 is a recessed bottomed hole.
  • the protruding piece accommodating portion 116 is positioned adjacent to the movable drive pulley side weight sliding surface 114 on the side opposite to the weight receiving portion 115 with respect to the rotational direction L so that the movable drive pulley 110 is positioned closer to the movable drive pulley side weight sliding surface 114 than the movable drive pulley side weight sliding surface 114 . and extending in a direction crossing the rotational direction L of the movable drive pulley 110 .
  • the radial length of the protruding piece accommodating portion 116 is longer than the radial length of the movable drive pulley-side weight sliding surface 114 .
  • the projecting piece accommodating portion 116 includes a weight-side end face 116a, a projecting piece receiving portion 117, an outer side surface 116b, and an inner side surface 116c.
  • the projecting piece accommodating portion 116 is formed in a concave shape that opens toward the lamp plate 130 .
  • the weight-side end surface 116 a is formed by cutting the protruding piece accommodating portion 116 into a concave shape at a position adjacent to the movable drive pulley-side weight sliding surface 114 , thereby forming the weight-side end surface 116 a. is a portion exposed in the protruding piece accommodating portion 116 .
  • the outer surface 116b is a surface that connects the movable drive pulley-side weight sliding surface 114 and the protruding piece receiving portion 117 at a radially outer portion of the movable drive pulley 110.
  • the outer surface 116 b is formed on the outer peripheral wall 118 .
  • the inner side surface 116c is a surface that connects the movable drive pulley side weight sliding surface 114 and the projecting piece receiving portion 117 at a radially inner portion of the movable drive pulley 110 .
  • the inner side surface 116c is formed on the center tubular portion 111 .
  • the groove width S of the projecting piece accommodating portion 116 is formed to be slightly larger than the plate thickness T of the lamp-side projecting piece 133 (see FIG. 8A).
  • the projecting piece receiving portion 117 receives the lamp-side projecting piece 133 (see FIG. 8A) positioned in the projecting piece accommodating portion 116 and applies the rotational driving force (see FIG. 8A) of the movable drive pulley 110. It is the part that receives the back torque).
  • the projecting piece receiving portion 117 is formed on the side wall 119 .
  • the protruding piece receiving portion 117 is provided at a position facing the weight receiving portion 115 .
  • the projecting piece receiving portion 117 is formed substantially parallel to the weight receiving portion 115 .
  • the protruding piece receiving portion 117 is formed parallel to the axial direction of the movable drive pulley 110 at a position adjacent to the movable drive pulley side weight sliding surface 114 on the side opposite to the weight receiving portion 115 in the rotation direction L.
  • the protruding piece receiving portion 117 is positioned upstream in the rotational direction L from the movable drive pulley side weight sliding surface 114 .
  • the projecting piece receiving portion 117 is a surface extending in a direction intersecting the rotational direction L of the movable drive pulley 110 .
  • the weight sliding surface 114 on the movable drive pulley side, the weight receiving portion 115, the projecting piece receiving portion 116, and the projecting piece receiving portion 117 are integrally connected to form a recessed receiving portion 113.
  • the three accommodating portions 113 are formed integrally with the center tubular portion 111 and the conical portion 112 when the movable drive pulley 110 is processed by aluminum die casting.
  • the weight 120 is housed in the housing portion 113 of the movable drive pulley 110 .
  • the weight 120 is housed in the housing portion 113 so that the center line C3 of the weight 120 is perpendicular to the radial direction when the lamp-side protruding piece 133 is in contact with the weight 120 and the weight 120 is in contact with the weight receiving portion 115. ing.
  • the weight 120 is provided so as to be freely movable (displaceable) in the radial direction of the movable drive pulley 110 .
  • the weight 120 is It is configured to be radially movable. As the ramp plate 130 rotates while the engine speed reaches from the cranking speed (for example, 50 rpm to 60 rpm) to the idling speed (for example, 600 rpm to 800 rpm), the weight 120 is moved to the lamp side protruding piece 133 and the weight. It is configured to come into contact with the receiving portion 115 .
  • the cranking speed for example, 50 rpm to 60 rpm
  • the idling speed for example, 600 rpm to 800 rpm
  • the number of revolutions of the engine when the ramp-side protruding piece 133 abuts on the weight 120 and the weight 120 abuts on the weight receiving portion 115 is the engine speed when the movable drive pulley 110 starts approaching the fixed drive pulley 102. lower than the rpm of the The weight 120 moves from the radially inner position (see FIG. 2) to the radially outer position (see FIG. 2) as the rotational speed of the movable drive pulley 110 increases (that is, due to the centrifugal force accompanying the rotation of the movable drive pulley 110). 5).
  • the weight 120 moves along the movable drive pulley-side weight sliding surface 114 and the ramp-side weight sliding surface 132 from a radially inner position. It is configured to be movable to a radially outer position. Weight 120 is sandwiched between movable drive pulley 110 and ramp plate 130 . Weights 120 are configured to push movable drive pulley 110 to bring movable drive pulley 110 closer to fixed drive pulley 102 . The weight 120 is a component that cooperates with the ramp plate 130 to press the movable drive pulley 110 toward the fixed drive pulley 102 side.
  • the weight 120 includes a weight body 121 and a body cover 122, as shown in FIGS. 7A to 7C.
  • the weight body 121 is a component that functions as a weight in the weight 120 .
  • the weight main body 121 is configured by forming a metal material into a cylindrical shape.
  • the weight body 121 is fitted into and integrated with the body cover 122 .
  • the body cover 122 is made of a resin material (for example, polyamide resin). By forming body cover 122 from a resin material, slidability and wear resistance between body cover 122 and movable drive pulley 110 and ramp plate 130 can be improved.
  • the body cover 122 contacts the movable drive pulley side weight sliding surface 114 and the ramp side weight sliding surface 132 .
  • the body cover 122 slides on the movable drive pulley side weight sliding surface 114 and the ramp side weight sliding surface 132 .
  • Body cover 122 is an example of a contact portion. As shown in FIG. 4, the body cover 122 has a first sliding surface 122a (see FIG. 7A), a second sliding surface 122b, a first end 122c and a second end 122d.
  • the first sliding surface 122a is a surface that slides on the movable drive pulley-side weight sliding surface 114.
  • the first sliding surface 122a is a curved surface with an arc-shaped cross section.
  • the second sliding surface 122b is a surface that slides on a ramp-side weight sliding surface 132, which will be described later.
  • the second sliding surface 122b is a plane having a linear cross section.
  • the second sliding surface 122b is an example of a weight-side flat portion.
  • a notch 122e (see FIG. 7B) is formed in a portion of the body cover 122 adjacent to the first sliding surface 122a and the second sliding surface 122b.
  • the weight body 121 is inserted into the body cover 122 through the notch 122e.
  • the weight body 121 is exposed to the outside through the notch 122e.
  • the weight 120 is configured to be able to contact the lamp-side projecting piece 133 .
  • the weight 120 is configured to contact the weight receiving portion 115 .
  • the first end portion 122c is configured to be able to contact the weight receiving portion 115.
  • the first end portion 122 c is a portion that presses the weight receiving portion 115 .
  • the first end 122c is a flat surface that covers one axial end of the weight body 121 (the downstream end in the rotational direction L).
  • the first end 122c is an example of a first surface.
  • the second end portion 122d is configured to be able to come into contact with the lamp-side protruding piece 133. As shown in FIG.
  • the second end portion 122 d is a portion that receives pressure from the lamp-side projecting piece 133 .
  • the second end 122d is a flat surface that covers the other axial end of the weight body 121 (the upstream end in the rotational direction L).
  • the main body cover 122 is formed to have a length such that a part of the second end 122d is located in the protruding piece accommodating portion 116 while the first end 122c is in contact with the weight receiving portion 115 .
  • a length P1 of the weight 120 in a direction perpendicular to the radial direction and the axial direction of the crankshaft 90 is longer than a radial length P2 of the weight 120 .
  • length P1 is the length of weight 120 in the longitudinal direction.
  • the normal line C2 of the circle C1 centered on the rotation center 110C of the movable drive pulley 110 passes through the first end 122c and the second end 122d of the weight 120. .
  • the case where the weight 120 is tilted and stored in the storage portion 113 is also included. Further, when the lamp-side protruding piece 133 is in contact with the weight 120 and the weight 120 is in contact with the weight receiving portion 115, the center line C3 of the weight 120 perpendicular to the radial direction and the axial direction of the crankshaft 90 is , overlaps the normal C2 when viewed from the axial direction of the crankshaft 90 .
  • the ramp plate 130 is a component that presses the weight 120 toward the movable drive pulley 110 side.
  • the ramp plate 130 is located on the opposite side of the movable drive pulley 110 from the fixed drive pulley 102 .
  • the ramp plate 130 is rotationally driven integrally with the crankshaft 90 .
  • the lamp plate 130 is made of a metal material (eg, aluminum material).
  • the lamp plate 130 is a disc-shaped flat plate. More specifically, as shown in FIG. 8A, the lamp plate 130 includes a disk portion 131, a projecting member 132R having a lamp-side weight sliding surface 132, a lamp-side projecting piece 133, and a fin 134 (see FIG. 4). ).
  • the disc portion 131 is a flat plate formed in a disc shape.
  • a projecting member 132 ⁇ /b>R having a ramp-side weight sliding surface 132 and a ramp-side projecting piece 133 are formed on the surface of the disk portion 131 facing the movable drive pulley 110 .
  • 131 C of through-holes are formed in the center part in the disk part 131.
  • the outer peripheral portion of the crankshaft 90 is integrally attached to the through hole 131C. Therefore, the ramp plate 130 is always rotated integrally with the crankshaft 90 .
  • the projecting member 132R is a wall that rises from the surface of the disc portion 131 toward the movable drive pulley 110.
  • the protruding member 132R is positioned on the side of the lamp-side protruding piece 133 (downstream side in the rotation direction L).
  • the protruding member 132R can be accommodated in the accommodating portion 113.
  • the ramp-side weight sliding surface 132 of the protruding member 132R is a surface that sandwiches the weight 120 together with the movable drive pulley-side weight sliding surface 114 of the movable drive pulley 110 in a radially movable state. The weight 120 slides on the ramp-side weight sliding surface 132 .
  • the ramp-side weight sliding surface 132 extends radially.
  • the ramp-side weight sliding surface 132 is a smooth surface extending in the radial direction.
  • the ramp-side weight sliding surface 132 is inclined such that the radially outer portion is located closer to the movable drive pulley 110 than the radially inner portion.
  • three ramp-side weight sliding surfaces 132 are formed at equal intervals along the rotation direction L of the disc portion 131 .
  • the ramp-side weight sliding surface 132 has a ramp-side planar portion 132a formed in a planar shape.
  • the second sliding surface 122b of the weight 120 contacts the ramp-side flat portion 132a.
  • the second sliding surface 122b slides on the lamp-side flat portion 132a.
  • the lamp-side protruding piece 133 is accommodated in the protruding piece accommodating portion 116 .
  • the ramp-side projecting piece 133 is positioned upstream in the rotational direction L with respect to the weight 120 .
  • the lamp-side protruding piece 133 extends in a direction intersecting with the rotation direction L when viewed from the axial direction of the crankshaft 90 .
  • the lamp-side projecting piece 133 is provided so as to contact the weight 120 .
  • the lamp-side protruding piece 133 is provided so as to be able to contact the protruding piece receiving portion 117 .
  • the lamp-side protruding piece 133 is configured to be movable in the rotational direction L relative to the housing portion 113 in a state of being housed in the housing portion 113 .
  • the lamp-side protruding piece 133 presses the second end 122d of the weight 120 by the rotational driving force of the engine.
  • the ramp-side projecting piece 133 indirectly presses the movable drive pulley 110 via the weight 120 by the rotational driving force of the engine.
  • the second pressing surface 133b see FIG. 10) of the ramp-side projecting piece 133 receives the pressing force from the projecting piece receiving portion 117 of the movable drive pulley 110. receive.
  • the rotational driving force (back torque) transmitted to the lamp-side projecting piece 133 is transmitted to the crankshaft 90 .
  • the ramp-side projecting piece 133 receives a pressing force from the second end portion 122 d due to the rotational driving force (back torque) from the movable drive pulley 110 .
  • the lamp-side protruding piece 133 is a wall that rises from the surface of the disk portion 131 toward the movable drive pulley 110 . More specifically, as shown in FIG. 10, the lamp-side protruding piece 133 is arranged to face the second end 122d of the weight 120, and is in planar contact with the second end 122d. It has a first pressing surface 133 a (see also FIG.
  • the first pressing surface 133a is sized to contact a portion of the second end 122d of the weight 120, but may be sized to contact the entire surface of the second end 122d.
  • three lamp-side protruding pieces 133 are formed at equal intervals along the rotation direction L of the disc portion 131 .
  • the lamp-side protruding piece 133 is formed integrally with the side surface of the lamp-side weight sliding surface 132 formed on the disk portion 131 . That is, the lamp plate 130 is formed by integrally molding a disk portion 131, three lamp-side weight sliding surfaces 132, and three lamp-side protruding pieces 133 by aluminum die-cast molding. 1, 2 and 5, although the lamp-side projecting piece 133 is not originally shown, it is intentionally shown by a two-dot chain line in order to clarify the positional relationship of the lamp-side projecting piece 133. As shown in FIG.
  • a plurality of fins 134 are formed on the surface of the ramp plate 130 (more specifically, the disk portion 131 ) opposite to the surface facing the movable drive pulley 110 . Fins 134 extend radially. The fins 134 are radially formed. By providing the fins 134 on the lamp plate 130, the lamp plate 130 can be cooled more effectively and the rigidity of the lamp plate 130 is increased.
  • the ramp plate 130 is positioned on the second direction D2 side of the internal space 118S. As shown in FIG. 14 , when the weight 120 is positioned radially inward, the ramp plate 130 partially overlaps the internal space 118S when viewed from the axial direction of the crankshaft 90 . The ramp plate 130 does not overlap the first recessed portion 118D when viewed from the axial direction of the crankshaft 90 . The ramp plate 130 overlaps the second recessed portion 118H when viewed from the axial direction of the crankshaft 90 .
  • FIG. 15 when the weight 120 is positioned radially outward (see FIG. 5 ), when viewed from the radial direction of the crankshaft 90 A through-hole 160 is formed.
  • An air flow path is formed by the through hole 160 .
  • Air outside ramp plate 130 and movable drive pulley 110 flows through through hole 160 into the space surrounded by ramp plate 130 and movable drive pulley 110 , and then flows outside ramp plate 130 and movable drive pulley 110 .
  • flow to A portion of the through-hole 160 is defined by the lamp-side projecting piece 133 and the projecting member 132R.
  • Through hole 160 includes lamp-side protruding piece 133, protruding member 132R, weight 120, movable drive pulley 110 (more specifically, outer peripheral wall 118), and ramp plate 130 (more specifically, disk portion 131). are separated by Further, the end portion 120T of the weight 120 in the second direction D2 when the weight 120 is positioned radially outward is the end portion of the movable drive pulley 110 in the second direction D2 (here, for example, the end portion of the outer peripheral wall 118). 2 end surface 118T) in the second direction D2).
  • the ramp plate A through hole 160 is formed between 130 and movable drive pulley 110 .
  • the weight 120 is positioned radially inwardly and positioned radially outwardly, there is a gap between the ramp plate 130 and the movable drive pulley 110 when viewed from the radial direction of the crankshaft 90 . is formed with a through hole 160 .
  • the V-belt 140 is a component for transmitting the rotational driving force of the drive pulley 101 to the driven pulley 150.
  • the V-belt 140 is formed in an endless ring shape with a core wire covered with a resin material.
  • V-belt 140 is disposed between fixed drive pulley 102 and movable drive pulley 110 of drive pulley 101 and between fixed driven pulley 151 and movable driven pulley 154 of driven pulley 150 to connect drive pulley 101 and driven pulley 150 . is erected between
  • the driven pulley 150 is a component that transmits the rotational power of the engine transmitted from the drive pulley 101 via the V-belt 140 to the centrifugal clutch 200 .
  • the driven pulley 150 includes a fixed driven pulley 151 , a driven sleeve 152 and a movable driven pulley 154 .
  • the fixed driven pulley 151 and the movable driven pulley 154 are components that rotate while holding the V-belt 140 therebetween.
  • the fixed driven pulley 151 is configured by forming a metal material (for example, an aluminum material) into a conical cylinder.
  • the fixed driven pulley 151 is fixed on the driven sleeve 152 with the convex surface facing the movable driven pulley 154 side.
  • the driven sleeve 152 is a metallic cylindrical part that rotates integrally with the fixed driven pulley 151 .
  • the driven sleeve 152 is rotatably attached to the drive shaft 153 via a bearing.
  • the drive shaft 153 is a metal rotating shaft for driving the rear wheels of the motorcycle on which the continuously variable transmission 100 is mounted via a transmission (not shown).
  • a rear wheel of the motorcycle is attached to one end (right side in the figure) of the drive shaft 153 .
  • the movable driven pulley 154 is a component that rotates while holding the V-belt 140 with the fixed driven pulley 151.
  • the movable driven pulley 154 is made of a metal material (eg, aluminum material). It is formed in a conical cylindrical shape.
  • the movable driven pulley 154 is axially slidably fitted to the driven sleeve 152 with its convex surface facing the fixed driven pulley 151 .
  • a torque spring 155 is provided between the concave side surface of the movable driven pulley 154 and the drive plate 201 of the centrifugal clutch 200 .
  • the torque spring 155 is a coil spring that elastically presses the movable driven pulley 154 toward the fixed driven pulley 151 side. That is, the continuously variable transmission 100 has a diameter across the V-belt 140 defined by the distance between the fixed drive pulley 102 and the movable drive pulley 110, and a V diameter defined by the distance between the fixed driven pulley 151 and the movable driven pulley 154.
  • the rotational speed of the drive shaft 153 is changed steplessly according to the size relationship with the diameter of the belt 140 .
  • a centrifugal clutch 200 is provided on the tip side of each of the driven sleeve 152 and the drive shaft 153 .
  • Centrifugal clutch 200 is a device that transmits or blocks the rotational driving force of the engine transmitted through continuously variable transmission 100 to drive shaft 153 .
  • Centrifugal clutch 200 includes drive plate 201 , three clutch weights 203 and clutch outer 206 .
  • the drive plate 201 is a part that rotates integrally with the driven sleeve 152 .
  • the drive plate 201 is configured by forming a metal material into a stepped disc shape.
  • three rocking support pins 202 are provided at the outer edge of the board surface of the drive plate 201 in a state of standing upright in the rotation direction L.
  • Clutch weights 203 are respectively supported by the swing support pins 202 .
  • the three clutch weights 203 are parts for transmitting or blocking the rotational driving force from the engine to the drive shaft 153 according to the number of revolutions of the drive plate 201 respectively.
  • the clutch weight 203 is formed by forming a curved shape extending along the rotation direction L of the drive plate 201 from a metal material (for example, zinc material).
  • the three clutch weights 203 are mutually pulled radially inward by a connecting spring 204 .
  • Clutch shoe 205 is a component for increasing the frictional force against the inner peripheral surface of clutch outer 206 .
  • Clutch shoe 205 is configured by forming a friction material into a plate shape extending in an arc shape.
  • One end of the clutch weight 203 is supported by the swing support pin 202 in a swingable state with the clutch shoe 205 facing the inner peripheral surface of the clutch outer 206 .
  • the clutch shoes 205 come into contact with or separate from the inner peripheral surface of the clutch outer 206 according to the rotational speed of the drive plate 201 .
  • the clutch outer 206 is a part that rotates integrally with the drive shaft 153 .
  • Clutch outer 206 is formed by forming a metal material into a cup shape that covers the outer peripheral surface of clutch weight 203 from drive plate 201 .
  • Clutch outer 206 transmits or blocks rotational driving force from the engine to drive shaft 153 by contact of clutch weight 203 via clutch shoe 205 .
  • the continuously variable transmission 100 functions as a part of a power transmission mechanism arranged between an engine of a motorcycle such as a scooter and rear wheels, which are driving wheels.
  • the elastic force of the torque spring 155 causes the movable driven pulley 154 to be closest to the fixed driven pulley 151 . Therefore, the movable drive pulley 110 is located at the farthest position from the fixed drive pulley 102 (see FIGS. 1 and 2).
  • the weight 120 When the engine is stopped, the weight 120 is sandwiched between the movable drive pulley-side weight sliding surface 114 and the ramp-side weight sliding surface 132, as shown in FIG.
  • a gap is formed between the lamp-side projecting piece 133 and the weight 120, and a gap is formed between the weight 120 and the weight receiving portion 115.
  • a gap may be formed between the lamp-side projecting piece 133 and the weight 120, and the weight 120 and the weight receiving portion 115 may be in contact with each other.
  • the lamp-side protruding piece 133 and the weight 120 may be in contact with each other, and a gap may be formed between the weight 120 and the weight receiving portion 115 .
  • the weight 120 is arranged so that the center line C3 of the weight 120 is orthogonal to the lamp-side projecting piece 133, but is arranged so that the center line C3 is inclined. (That is, the weight 120 may be inclined with respect to the lamp-side projecting piece 133). In this case, the above-mentioned gap becomes non-uniform with respect to the radial direction.
  • the fixed drive pulley 102 and the ramp plate 130 are driven to rotate together with the crankshaft 90 by the rotation of the crankshaft 90.
  • the first pressing surface 133 a of the lamp-side projecting piece 133 of the ramp plate 130 presses the second end 122 d of the weight 120 .
  • the first end portion 122 c of the weight 120 presses the weight receiving portion 115 .
  • the movable drive pulley 110 rotates at the same number of rotations as the ramp plate 130 . That is, the movable drive pulley 110 rotates at the same number of revolutions as the crankshaft 90 and the fixed drive pulley 102 .
  • the centrifugal force acting on the weight 120 is smaller than the elastic force of the torque spring 155, the weight 120 is positioned radially inward and does not move radially outward.
  • the continuously variable transmission 100 keeps the movable drive pulley 110 separated from the fixed drive pulley 102, so that the V-belt 140 moves outward from the innermost circumference of the drive pulley 101. no. Therefore, since the centrifugal force acting on the clutch weight 203 of the centrifugal clutch 200 is smaller than the elastic force (tensile force) of the connecting spring 204, the clutch shoe 205 does not come into contact with the inner peripheral surface of the clutch outer 206, and the engine rotation is reduced. No driving force is transmitted to the drive shaft 153 .
  • the centrifugal force acting on the clutch weight 203 of the centrifugal clutch 200 causes the elasticity of the connecting spring 204 to increase. greater than the force (tensile force).
  • the clutch shoes 205 come into contact with the inner peripheral surface of the clutch outer 206 , so that the rotational driving force of the engine is transmitted to the drive shaft 153 .
  • the centrifugal force acting on the weight 120 is determined by the sum of the cam thrust generated by the torque cam groove (not shown) provided in the movable driven pulley 154 and the thrust of the torque spring 155. will also grow.
  • This causes the weight 120 to start moving to the radially outer position. That is, in a state in which the weight 120 is in contact with the ramp-side projecting piece 133 and the weight receiving portion 115, the weight 120 moves along the movable drive pulley-side weight sliding surface 114 from the radially inner position to the radially outer position. start moving to Then, as shown in FIGS. 5 and 12, the weight 120 moves to a radially outer position.
  • the movable drive pulley-side weight sliding surface 114 and the ramp-side weight sliding surface 132 sandwiching the weight 120 are formed so that the distance between them narrows from the inner side to the outer side in the radial direction. Therefore, the movable drive pulley 110 moves toward the fixed drive pulley 102 as the weight 120 moves radially outward. That is, when the movable drive pulley 110 approaches the fixed drive pulley 102, the V-belt 140 moves from the innermost peripheral portion of the drive pulley 101 to the outer peripheral side and moves from the outermost peripheral portion of the driven pulley 150 to the inner peripheral side. Moving.
  • back torque may act on the continuously variable transmission 100 from the driving wheels.
  • the second pressing surface 133 b of the lamp-side projecting piece 133 receives the pressing force from the projecting piece receiving portion 117 of the movable drive pulley 110 .
  • the rotational driving force (back torque) thus transmitted to the ramp plate 130 is transmitted to the crankshaft 90 .
  • the continuously variable transmission 100 of the present embodiment when the weight 120 is positioned radially outward, the distance between the ramp plate 130 and the movable drive pulley 110 when viewed from the radial direction of the crankshaft 90 is A radially extending through hole 160 is formed in the . Therefore, when weight 120 is positioned radially outward, air flows through through hole 160 between movable drive pulley 110 and ramp plate 130 , thereby cooling movable drive pulley 110 . In this manner, air can flow between the movable drive pulley 110 and the ramp plate 130 via the through hole 160, so that the movable drive pulley 110 can be effectively cooled.
  • the end portion 120T of the weight 120 in the second direction D2 when the weight 120 is positioned on the radially outer side corresponds to the end surface 118T of the movable drive pulley 110 in the second direction D2. located on the side of the second direction D2.
  • the weight 120 allows the movable drive pulley 110 to be largely separated from the ramp plate 130 in the first direction D1, so that the through hole 160 can be made wider. That is, more air can flow between the movable drive pulley 110 and the ramp plate 130 through the through hole 160 .
  • the through hole 160 is formed between the ramp plate 130 and the movable drive pulley 110 even when the weight 120 is positioned radially inward. According to the above aspect, even when the weight 120 is positioned radially inward, the air flows through the through hole 160 between the movable drive pulley 110 and the ramp plate 130, thereby cooling the movable drive pulley 110. can do.
  • the movable drive pulley 110 includes a housing portion 113 that houses the weight 120 , and the ramp plate 130 is housed in the housing portion 113 and is capable of coming into contact with the weight 120 .
  • a side protruding piece 133 is provided, and the lamp side protruding piece 133 extends in a direction intersecting the rotation direction L when viewed from the axial direction of the crankshaft 90 .
  • the lamp-side protruding piece 133 can guide the air outside the movable drive pulley 110 and the lamp plate 130 further inside.
  • the ramp plate 130 includes a plurality of ramp-side protruding pieces 133 and radially outer portions positioned to the sides of the ramp-side protruding pieces 133 and extending in the radial direction. is positioned closer to the movable drive pulley 110 than the radially inner portion and has a plurality of ramp-side weight sliding surfaces 132 on which the weights 120 slide, and a part of the through hole 160 is , the lamp-side protruding piece 133 and the protruding member 132R.
  • the air outside movable drive pulley 110 and ramp plate 130 can be guided further inside by lamp-side protruding piece 133 and protruding member 132R.
  • fins 134 are formed on the surface of the ramp plate 130 opposite to the surface facing the movable drive pulley 110 . According to the above aspect, the fins 134 enhance the heat dissipation of the lamp plate 130 , so that the heat remaining between the lamp plate 130 and the movable drive pulley 110 can also be discharged from the lamp plate 130 . The fins 134 also increase the rigidity of the ramp plate 130 .
  • the weight 120 includes the weight body 121 made of metal and the body cover 122 made of resin.
  • the weight 120 may be integrally formed from a single material, or may be formed from three or more kinds of materials.
  • the body cover 122 may be made of metal.
  • the first sliding surface 122a of the weight 120 was curved.
  • the first sliding surface 122a may be a flat surface as long as it can slide (including rolling) on the movable drive pulley-side weight sliding surface 114 .
  • the second sliding surface 122b of the weight 120 was flat.
  • the second sliding surface 122b may be a curved surface as long as it can slide (including rolling) on the ramp-side weight sliding surface 132 .
  • the weight 120 rolls on the movable drive pulley-side weight sliding surface 114 and the ramp-side weight sliding surface 132.
  • the ramp plate 130 is integrally formed by connecting the ramp-side weight sliding surface 132 and the ramp-side protruding piece 133 .
  • the rigidity of the lamp-side projecting piece 133 projecting from the disk portion 131 can be improved.
  • the lamp-side weight sliding surface 132 and the lamp-side protruding piece 133 may be formed at positions separated from each other.
  • the projecting piece accommodating portion 116 is formed into a square box shape in plan view by the weight side end surface 116a, the outer surface 116b, the inner surface 116c, and the projecting piece receiving portion 117.
  • the movable drive pulley 110 can also be configured without the projecting piece accommodating portion 116 .
  • the outer side surface 116b and the inner side surface 116c of the protruding piece accommodating portion 116 may be omitted, and the protruding piece receiving portion 117 may be provided with a thickness equal to or greater than the thickness of the lamp side protruding piece 133 with respect to the end portion of the movable drive pulley side weight sliding surface 114. It is good to provide it through a gap. According to this, ventilation is ensured between the lamp-side projecting piece 133 and the projecting piece receiving portion 117 and between the lamp-side projecting piece 133 and the second end portion 122d of the weight 120, thereby suppressing overheating. can do.
  • the movable drive pulley 110 is integrally formed by connecting the movable drive pulley-side weight sliding surface 114 and the weight receiving portion 115 .
  • the rigidity of the weight receiving portion 115 projecting from the conical portion 112 can be improved.
  • the movable drive pulley side weight sliding surface 114 and the weight receiving portion 115 may be formed at positions separated from each other.
  • the movable drive pulley 110 has three movable drive pulley-side weight sliding surfaces 114 and three protruding piece receiving portions 117 (that is, three sets).
  • the movable drive pulley 110 only needs to have at least one movable drive pulley-side weight sliding surface 114 and at least one projecting piece receiving portion 117 .
  • the ramp-side weight sliding surfaces 132 and the ramp-side protruding pieces 133 are formed according to the number of the movable drive pulley-side weight sliding surfaces 114 and the protruding piece receiving portions 117 formed.
  • movable drive pulley-side weight sliding surfaces 114 and projecting piece receiving portions 117 are provided (that is, when a plurality of sets are provided), they are arranged at equal intervals in the rotational direction L of the movable drive pulley 110, They may be arranged at uneven intervals along the direction L, or may be formed at different positions in the radial direction of the movable drive pulley 110 .
  • the movable drive pulley-side weight sliding surface 114 had the flat surface portion 114a and the curved surface portion 114b.
  • the movable drive pulley side weight sliding surface 114 may have only one of the flat portion 114a and the curved portion 114b.
  • the ramp-side weight sliding surface 132 has the ramp-side planar portion 132a formed in a planar shape.
  • the ramp-side weight sliding surface 132 may have a curved surface portion.
  • the radial length of the protruding piece accommodating portion 116 is longer than the radial length of the movable drive pulley-side weight sliding surface 114, but is not limited to this.
  • the radial length of the protruding piece accommodating portion 116 and the radial length of the movable drive pulley-side weight sliding surface 114 may be the same.
  • the ramp plate 130 when the weight 120 is positioned radially inward, the ramp plate 130 is configured to partially overlap the internal space 118S when viewed from the axial direction of the crankshaft 90.
  • the plate 130 may not overlap the internal space 118S.
  • the engine is used as the power source, but the power source is not limited to the engine, and may be an electric motor or the like.
  • the straddle-type vehicle in this embodiment is a vehicle that the driver rides on. Straddle-type vehicles are not limited to motorcycles such as scooters.
  • the straddle-type vehicle may be, for example, a tricycle, an ATV (All Terrain Vehicle), a snowmobile, or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

Une transmission à variation continue (100) comprend une poulie d'entraînement mobile (110) entre une poulie d'entraînement fixe (102) et une plaque de rampe (130), vu depuis une direction radiale d'un vilebrequin (90) lorsqu'un poids (120) est situé radialement à l'extérieur, un trou traversant (160) pénétrant dans la direction radiale étant formé entre la plaque de rampe (130) et la poulie d'entraînement mobile (110).
PCT/JP2023/004614 2022-03-02 2023-02-10 Transmission à variation continue WO2023166955A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022031549 2022-03-02
JP2022-031549 2022-03-02

Publications (1)

Publication Number Publication Date
WO2023166955A1 true WO2023166955A1 (fr) 2023-09-07

Family

ID=87883260

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/JP2023/001218 WO2023166872A1 (fr) 2022-03-02 2023-01-17 Transmission à variation continue
PCT/JP2023/004614 WO2023166955A1 (fr) 2022-03-02 2023-02-10 Transmission à variation continue
PCT/JP2023/004615 WO2023166956A1 (fr) 2022-03-02 2023-02-10 Transmission à variation continue

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/001218 WO2023166872A1 (fr) 2022-03-02 2023-01-17 Transmission à variation continue

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/004615 WO2023166956A1 (fr) 2022-03-02 2023-02-10 Transmission à variation continue

Country Status (2)

Country Link
JP (1) JP7348427B1 (fr)
WO (3) WO2023166872A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02130449U (fr) * 1989-04-05 1990-10-26
JPH0671950U (ja) * 1993-03-22 1994-10-07 栃木富士産業株式会社 無段変速装置
JP2007205526A (ja) * 2006-02-03 2007-08-16 Yamada Seisakusho Co Ltd Ｖベルト変速装置の駆動側プーリ
JP3144745U (ja) * 2008-06-30 2008-09-11 林▲恵▼玉 オートバイク用駆動盤

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02209652A (ja) * 1989-02-08 1990-08-21 Yamaha Motor Co Ltd Ｖベルト自動変速装置
JP4128712B2 (ja) 1999-12-20 2008-07-30 株式会社山田製作所 動力伝達装置及びその組付方法
JP6293560B2 (ja) * 2014-04-11 2018-03-14 株式会社エフ・シー・シー 遠心クラッチ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02130449U (fr) * 1989-04-05 1990-10-26
JPH0671950U (ja) * 1993-03-22 1994-10-07 栃木富士産業株式会社 無段変速装置
JP2007205526A (ja) * 2006-02-03 2007-08-16 Yamada Seisakusho Co Ltd Ｖベルト変速装置の駆動側プーリ
JP3144745U (ja) * 2008-06-30 2008-09-11 林▲恵▼玉 オートバイク用駆動盤

Also Published As

Publication number Publication date
JP7348427B1 (ja) 2023-09-20
JPWO2023166872A1 (fr) 2023-09-07
WO2023166956A1 (fr) 2023-09-07
WO2023166872A1 (fr) 2023-09-07

Similar Documents

Publication Publication Date Title
US6733406B2 (en) Variable-speed V-belt drive for vehicle
TW201643331A (zh) 離心離合器
EP1998063B1 (fr) Embrayage centrifuge et véhicule de type à enfourcher l'incluant
WO2019138653A1 (fr) Embrayage centrifuge
WO2019216351A1 (fr) Embrayage centrifuge
WO2019138649A1 (fr) Embrayage centrifuge
WO2023166955A1 (fr) Transmission à variation continue
JP6503152B1 (ja) 遠心クラッチ
WO2019221138A1 (fr) Embrayage centrifuge
WO2019230574A1 (fr) Embrayage centrifuge
WO2021075239A1 (fr) Dispositif de poulie et embrayage centrifuge
JPH0914367A (ja) Ｖベルト式変速機
JP3188824B2 (ja) Ｖベルト式変速機
JP6510159B1 (ja) 遠心クラッチ
JP2004257458A (ja) ベルト式無段変速機
JP7208834B2 (ja) 遠心クラッチ、及びプーリ装置
US20240026934A1 (en) Clutch device
WO2021075237A1 (fr) Dispositif de poulie et embrayage centrifuge
WO2017135320A1 (fr) Unité de moteur
JP7284010B2 (ja) プーリ装置
TW202421940A (zh) 滑輪及皮帶式之無段變速機
WO2024095772A1 (fr) Transmission à variation continue de type poulie et courroie
JP7289227B2 (ja) プーリ装置
JPH11257447A (ja) Ｖベルト式自動変速装置
JP6667312B2 (ja) プーリ装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23763217

Country of ref document: EP

Kind code of ref document: A1