WO2018066224A1 - 無段変速機 - Google Patents
無段変速機 Download PDFInfo
- Publication number
- WO2018066224A1 WO2018066224A1 PCT/JP2017/028748 JP2017028748W WO2018066224A1 WO 2018066224 A1 WO2018066224 A1 WO 2018066224A1 JP 2017028748 W JP2017028748 W JP 2017028748W WO 2018066224 A1 WO2018066224 A1 WO 2018066224A1
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- WIPO (PCT)
- Prior art keywords
- drive plate
- continuously variable
- variable transmission
- plate
- pressing
- Prior art date
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Classifications
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- 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
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- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
- F16H55/49—Features essential to V-belts pulleys
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- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/52—Pulleys or friction discs of adjustable construction
- F16H55/56—Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable
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- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/52—Pulleys or friction discs of adjustable construction
- F16H55/56—Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable
- F16H55/563—Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable actuated by centrifugal masses
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- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
Definitions
- the present invention relates to a continuously variable transmission that continuously transmits the rotational driving force of an engine in a two-wheeled vehicle to a clutch.
- a continuously variable transmission that continuously transmits the rotational driving force of an engine in a two-wheeled vehicle to a clutch.
- a two-wheeled vehicle can be selected by selecting the ease of displacement of the movable pulley piece of the movable pulley piece and the fixed pulley piece constituting the drive pulley toward the fixed pulley piece in two stages.
- a continuously variable transmission is disclosed in which the travel mode can be adjusted in two stages, an eco mode and a drive mode.
- the continuously variable transmission described in Patent Document 1 includes two weight rollers each capable of reciprocal displacement in the centrifugal direction in order to select the ease of displacement of the movable pulley piece in two stages.
- the apparatus configuration is increased in size, complexity, and weight, such as a movable plate for restricting the displacement in the centrifugal direction of one of the weight rollers.
- the present invention has been made to address the above problems, and an object of the present invention is to provide a continuously variable transmission that can suppress an increase in size, complexity, and weight of the device configuration.
- the present invention is characterized in that a fixed drive plate that rotates integrally with a crankshaft that is driven to rotate by an engine, and a centrifugal drive force that is disposed opposite to the fixed drive plate and that is driven to rotate the crankshaft
- a drive pulley having a movable drive plate that approaches or separates from the fixed drive plate on the same crankshaft, and a driven pulley that is disposed opposite to the radial direction side of the drive pulley to transmit the rotational driving force of the engine to the output side
- a continuously variable transmission having an endless belt laid between the drive pulley and the driven pulley, the displacement resistor being abutted against the movable drive plate from the fixed drive plate side, and the displacement resistor being a movable drive
- a pressing means for elastically pressing the plate is characterized in that a fixed drive plate that rotates integrally with a crankshaft that is driven to rotate by an engine, and a centrifugal drive force that is disposed opposite to the fixed drive plate and
- the pressing means there are an elastic body made of a repellent material such as a spring or urethane resin that displaces the displacement resistor toward the movable drive plate, a pneumatic or hydraulic cylinder, an electric motor, a solenoid, or a magnet.
- a repellent material such as a spring or urethane resin that displaces the displacement resistor toward the movable drive plate, a pneumatic or hydraulic cylinder, an electric motor, a solenoid, or a magnet.
- the continuously variable transmission includes a displacement resistor with respect to the movable drive plate that is displaced toward the fixed drive plate among the fixed drive plate and the movable drive plate constituting the drive pulley. Since the load (reaction force) is directly applied by the pressing means, it is possible to suppress an increase in size, complexity, and weight of the apparatus configuration as compared with the prior art.
- the continuously variable transmission further includes variable means for changing the pressing force by the pressing means.
- the variable means includes a feed screw mechanism that moves the position of the displacement resistor or the pressing means, a feed screw mechanism that changes the amount of deformation of an elastic body such as a spring or a urethane resin material as the pressing means, or a wire line.
- a pressing mechanism a control device for controlling the operation of an electric motor or a solenoid as a pressing means, and the like.
- the continuously variable transmission includes variable means for changing the pressing force by the pressing means, so that the speed change characteristics can be freely changed.
- the pressing means is constituted by a resistance spring including a coil spring.
- the continuously variable transmission is configured by a resistance spring including a coil spring as a pressing unit. Therefore, the device configuration is simplified and the device configuration is increased in size and complexity. And weight can be suppressed.
- Another feature of the present invention is that in the continuously variable transmission, in the continuously variable transmission, a plurality of displacement resistors are formed adjacent to each other around the crankshaft along the circumferential direction.
- each end on the pressing means side is held by a pressing side holding body formed in a ring shape
- each end on the movable drive plate side is held by a plate side holding body formed in a ring shape.
- the continuously variable transmission includes a plurality of rod bodies in which the displacement resistance body is disposed outside the crankshaft, and each displacement resistance body is pressed. Since the side holding body and the plate side holding body are respectively held, the rigidity of the entire displacement resistance body can be increased, and the pressing means and the movable drive plate are prevented from passing through the pressing side holding body and the plate side holding body. Therefore, it is possible to prevent problems such as seizure due to wear and friction.
- the continuously variable transmission further includes a sliding member that is disposed between the plate-side holder and the movable drive plate to reduce friction between the two.
- a sliding member that is disposed between the plate-side holder and the movable drive plate to reduce friction between the two.
- a material having a lower coefficient of friction for example, a resin material
- a material that lowers the coefficient of friction between the plate-side holder and the movable drive plate E.g. lubricating oil or grease.
- the continuously variable transmission includes a sliding member that reduces friction between the plate-side holder and the movable drive plate. Twisting, wear of the plate-side holder, and seizure between them can be suppressed.
- Another feature of the present invention is that in the continuously variable transmission, the displacement resistor is disposed through the fixed drive plate, and the pressing means is opposite to the movable drive plate with respect to the fixed drive plate. It is that it is provided on the side.
- the continuously variable transmission includes a displacement resistor that is disposed through the fixed drive plate and a pressing unit that is movable with respect to the fixed drive plate. Is provided on the opposite side, so that the movable drive plate can be displaced to a position closer to the fixed drive plate, so that the gear ratio can be set widely and the device configuration can be reduced in size. it can.
- FIG. 2 is an enlarged side cross-sectional view showing the continuously variable transmission shown in FIG. 1 in an enlarged manner.
- FIG. 3 is an enlarged side cross-sectional view showing a state in which the continuously variable transmission shown in FIG. 2 is rotationally driven at a high rotational speed.
- It is a perspective view which shows the external appearance structure of the plate side holder in the continuously variable transmission shown in FIG.
- It is a perspective view which shows the external appearance structure of the displacement resistance body in the continuously variable transmission shown in FIG.
- FIG. 2 is a perspective view which shows the external appearance structure of the press side holding body in the continuously variable transmission shown in FIG.
- FIG. 2 is a cross-sectional view showing a state in which a speed change characteristic is changed at a higher rotational speed by operating a variable mechanism in the continuously variable transmission shown in FIG. 1.
- FIG. 2 is a cross-sectional view showing a state in which a speed change characteristic is changed at a lower speed by operating a variable mechanism in the continuously variable transmission shown in FIG. 1.
- FIG. 1 is a side sectional view schematically showing a configuration of a continuously variable transmission 100 according to the present invention.
- FIG. 2 is an enlarged side sectional view showing the continuously variable transmission 100 shown in FIG. 1 in an enlarged manner.
- the continuously variable transmission 100 is provided between an engine and a centrifugal clutch 200 on the rear wheel side, which is a driving wheel, mainly in a motorcycle such as a scooter, and continuously changes a reduction ratio with respect to the engine speed.
- the mechanical device transmits the rotational driving force to the centrifugal clutch 200.
- the continuously variable transmission 100 includes a drive pulley 101.
- the drive pulley 101 is a component that is provided on a crankshaft 90 extending from the engine and is directly driven to rotate by the rotational driving force of the engine.
- the drive pulley 101 mainly includes a fixed drive plate 102 and a movable drive plate 110.
- the fixed drive plate 102 is a component that is driven to rotate by sandwiching a V-belt 118 described later together with the movable drive plate 110, and is configured by forming a metal material (for example, an aluminum material) into a conical cylinder shape. More specifically, the fixed drive plate 102 mainly includes a disk portion 103, a conical portion 105, a heat radiation fin 107, and a guide portion 108.
- the disk portion 103 is a portion that connects the fixed drive plate 102 to the crankshaft 90 and supports the conical portion 105, and is formed in a flat plate ring shape.
- the disc portion 103 is formed with a fitting hole 103 a having an internal spline at the center, and the fitting hole 103 a is spline-fitted to the outer peripheral portion of the crankshaft 90.
- the disc portion 103 is screwed into one end (the left side in the drawing) of the crankshaft 90 in a state of being abutted against the sleeve bearing 104 that is fixedly fitted to the outer peripheral portion of the crankshaft 90.
- the nut 106 is fixed on the crankshaft 90.
- the fixed drive plate 102 is always rotated integrally with the crankshaft 90.
- a plurality of through holes 103b are formed outside the fitting holes 103a in the disc portion 103, respectively.
- the through-holes 103b are through-holes through which a displacement resistor 120, which will be described later, penetrates, and are formed at equal intervals outside the fitting holes 103a.
- the through-hole 103b is formed with six through-holes 103b at regular intervals around the fitting hole 103a.
- the through hole 103b is formed to have a size that allows at least the displacement resistor 120 to slide.
- the through-hole 103 b is formed with an inner diameter that is sufficiently larger than the outer diameter of the displacement resistor 120 to such an extent that a gap (so-called play) is generated outside the outer peripheral surface of the displacement resistor 120.
- the conical portion 105 is a portion that sandwiches the V-belt 118 together with the conical portion 114 of the movable drive plate 110, and is formed in a tapered surface shape that is inclined radially outward of the disc portion 103.
- the conical portion 105 has a plurality of heat radiation fins 107 formed on the surface opposite to the movable drive plate 110.
- the radiating fins 107 are portions for releasing the heat of the fixed drive plate 102 to the outside, and are provided radially around the axis of the crankshaft 90 on the outside of the disc portion 103.
- Guide portions 108 are formed in the inner portions of these heat radiation fins 107.
- the guide portion 108 is a portion that guides a pressing-side holding body 131 of the pressing mechanism 130 described later in the axial direction of the crankshaft 90, and is formed in a cylindrical shape. This guide part 108 is formed in the internal diameter which fits the press side holding body 131 in the state which can slide.
- the disk portion 103, the conical portion 105, the heat radiation fin 107, and the guide portion 108 are integrally formed to form the fixed drive plate 102.
- the movable drive plate 110 is a component that is rotationally driven with the V-belt 118 sandwiched with the fixed drive plate 102, and is configured by forming a metal material into a conical cylinder shape. More specifically, the movable drive plate 110 mainly includes a cylindrical portion 111, a conical portion 114, and a roller holding portion 115.
- the cylindrical portion 111 is a portion where the movable drive plate 110 is supported on the crankshaft 90 and a portion which supports the conical portion 114, and is formed in a cylindrical shape.
- the cylindrical portion 111 is attached to the sleeve bearing 104 via an impregnation bush, and is attached to the sleeve bearing 104 so as to be slidable in the axial direction and the circumferential direction.
- the movable drive plate 110 is slidably supported along the axial direction and the circumferential direction of the crankshaft 90, as shown in FIG.
- a receiving hole 111a that is recessed in a ring shape is formed on the end surface of the cylindrical portion 111 on the fixed drive plate 102 side, and a plate side holding body 112 and a sliding material 113 are provided in the receiving hole 111a.
- the plate side holding body 112 is a component for integrally holding one end of each of the plurality of displacement resistance bodies 120 described later, and a metal material (for example, steel material) is in a ring shape. It is formed and configured.
- the plate-side holding body 112 is formed with a bottomed holding hole 112a along the circumferential direction in which each end of the plurality of displacement resistors 120 is individually fitted to one end surface of the ring body.
- the holding hole 112a is formed in an inner diameter in which one end of the displacement resistor 120 is slidably fitted.
- the plate-side holder 112 has an end face on the opposite side of the holding hole 112a slidably fitted in the receiving hole 111a via a sliding material 113.
- the sliding material 113 is a component for reducing the frictional resistance between the plate-side holding body 112 and the receiving hole 111a to make it easy to slide, and the friction coefficient is lower than the friction coefficient between the plate-side holding body 112 and the receiving hole 111a. It is composed of the material that becomes. In this embodiment, the sliding material 113 is formed and configured in a ring shape that fits the resin material into the receiving hole 111a.
- the conical portion 114 is a portion that sandwiches the V belt 118 together with the conical portion 105 of the fixed drive plate 102, and is formed in a tapered surface shape that inclines toward the radially outer side of the cylindrical portion 111.
- the conical portion 114 has a roller holding portion 115 formed on the surface opposite to the fixed drive plate 102.
- the roller holding portion 115 is a portion that holds a plurality of roller weights 116 so as to be displaceable along the radial direction of the conical portion 114, and is formed so as to be recessed in each roller weight 116. In this case, each roller holding part 115 is formed so that the depth becomes shallower toward the radially outer side.
- the roller weight 116 is a component for pressing the movable drive plate 110 toward the fixed drive plate 102 in cooperation with the ramp plate 117 by being displaced radially outward in accordance with an increase in the rotational speed of the movable drive plate 110. Yes, it is formed by forming a metal material into a cylindrical shape.
- the ramp plate 117 is a component that presses the roller weight 116 toward the movable drive plate 110, and is configured by bending a flat ring-shaped metal plate toward the movable drive plate 110.
- the ramp plate 117 is fixed to the outer peripheral portion of the crankshaft 90 in a state of facing the roller holding portion 115.
- the V-belt 118 is a component for transmitting the rotational driving force of the drive pulley 101 to the driven pulley 150, and is formed in an endless ring shape in which the core wire is covered with a resin material.
- the V-belt 118 is disposed between the fixed drive plate 102 and the movable drive plate 110 and between the fixed driven plate 151 and the movable driven plate 154 in the driven pulley 150 described later. It is built between.
- the displacement resistor 120 is a component for applying a resistance force to the movable drive plate 110 that is displaced toward the fixed drive plate 102, and a metal material (for example, a steel material) is formed in a rod shape. Configured. More specifically, the displacement resistor 120 is formed to have a length that reaches the movable drive plate 110 through the fixed drive plate 102 in a state where the movable drive plate 110 is farthest from the fixed drive plate 102 (see FIG. 1). Has been. Further, the displacement resistor 120 has a plate fitting end 121 fitted into the holding hole 112a of the plate side holding body 112 in a stepped shape, and has an outer diameter smaller than that of the body.
- a metal material for example, a steel material
- a plurality of the displacement resistors 120 are arranged along the circumferential direction of the crankshaft 90 in a direction parallel to the crankshaft 90 at a position outside the crankshaft 90 and inside the V-belt 118.
- the displacement resistor 120 in the displacement resistor 120, six displacement resistors 120 are equally arranged along the circumferential direction of the crankshaft 90.
- each displacement resistor 120 has a plate fitting end 121 that is an end on the movable drive plate 110 side fitted and held on the plate side holding body 112, and each displacement resistor 120 on the fixed drive plate 102 side. The end portions pass through the through holes 103 b of the fixed drive plate 102 and are held by the pressing side holding body 131.
- the pressing mechanism 130 is a component group for applying a resistance force to the movable drive plate 110 that is displaced toward the fixed drive plate 102 by pressing the displacement resistor 120 against the movable drive plate 110.
- the pressing mechanism 130 mainly includes a pressing side holder 131, a bearing 132, an inner spring holder 133, a resistance spring 134, and an outer spring holder 135.
- the pressing side holding body 131 is a part for integrally holding the other ends of the plurality of displacement resistance bodies 120, and a metal material (for example, steel material) is formed in a ring shape. Configured. More specifically, the pressing side holding member 131 is formed in a ring body having an outer diameter that slides on the inner peripheral surface of the guide portion 108 of the fixed drive plate 102 and an inner diameter through which the outer spring holder 135 can pass. Yes.
- the pressing-side holding body 131 is formed with a bottomed holding hole 131a along the circumferential direction in which each end of the plurality of displacement resistance bodies 120 is individually fitted to one end face of the ring body.
- the holding hole 131a is formed in an inner diameter in which the other end of the displacement resistor 120 is slidably fitted.
- the pressing-side holding member 131 is slidably fitted to the inner peripheral surface of the guide portion 108 of the fixed drive plate 102, and the opposite side surface of the holding hole 131 a is interposed via the bearing 132 and the inner spring holder 133. It is pressed by a resistance spring 134.
- the bearing 132 is a component that couples the inner spring holder 133 to the pressing side holding body 131 in a relatively rotatable state, and is constituted by a thrust bearing.
- the inner spring holder 133 is a component for holding one end of the resistance spring 134, and is configured by forming a metal material into a cylindrical body. More specifically, the inner spring holder 133 is configured such that a housing portion 133a is formed on the inner side of one end of a cylindrical body that is slidably fitted onto the cylindrical portion of the outer spring holder 135. Has been.
- the accommodating portion 133 a accommodates one end side of the resistance spring 134.
- the resistance spring 134 is a component that generates a pressing force that presses the displacement resistor 120 against the movable drive plate 110, and is configured by a coil spring.
- the resistance spring 134 is disposed coaxially with the crankshaft 90 with one end held by the inner spring holder 133 and the other end held by the outer spring holder 135.
- the outer spring holder 135 is a component for holding the other end of the resistance spring 134, and is formed by forming a metal material into a cylindrical body. More specifically, the outer spring holder 135 is configured such that an accommodation portion 135a is formed on the inner side of one end of a cylindrical body that is slidably fitted into the cylindrical portion of the inner spring holder 133. ing. The accommodating portion 135 a accommodates the other end portion side of the resistance spring 134. A variable mechanism 140 is provided on the other end side of the outer spring holder 135.
- the variable mechanism 140 is a component group for increasing and decreasing the pressing force of the movable drive plate 110 by the pressing mechanism 130, and mainly includes the pressing body 141, the rotating shaft 142, the input body 143, and the wire 144. It is constituted by.
- the pressing body 141 is a component that presses the other end portion of the outer spring holder 135, and is formed in a shape in which a rod body made of metal (for example, aluminum material) is divided into two.
- the pressing body 141 is fixedly connected to the rotating shaft 142 with one rod body portion on the opposite side in a state where the two rod body portions divided into two are pressed against the other end of the outer spring holder 135. ing.
- the rotating shaft 142 is a part that supports the pressing body 141, and is composed of a metal (for example, aluminum) rod.
- the rotating shaft 142 is supported by a housing 145 of the continuously variable transmission 100 in a freely rotatable state via a bearing.
- An input body 143 is connected to an end of the rotating shaft 142 opposite to the end to which the pressing body 141 is connected.
- the input body 143 is a component for transmitting the operating force of the driver of the motorcycle vehicle on which the continuously variable transmission 100 is mounted to the rotating shaft 142 to rotate the rotating shaft 142, and is made of metal (for example, an aluminum material) is formed in a cylindrical shape.
- a wire 144 is connected to the end of the input body 143 opposite to the end to which the rotating shaft 142 is connected.
- the wire 144 is a component that transmits the operating force of the driver to the input body 143, and is configured by a metal (for example, stainless steel) wire.
- the tip of the wire 144 is connected to an operation handle (not shown) by the driver.
- variable mechanism 140 moves the pressing body 141 around the rotation shaft 142 to the outer spring holder.
- the side 135 is rotated while resisting the elastic force of the resistance spring 134.
- the variable mechanism 140 can increase or decrease the pressing force with which the displacement resistor 120 pushes the movable drive plate 110 by expanding and contracting the resistance spring 134.
- the reference numerals of the receiving hole 111a, the holding hole 112a, the plate fitting end 121, the holding hole 131a, the receiving portion 133a, the receiving portion 135a, and the housing 145 are omitted.
- the driven pulley 150 is a component that transmits the rotational drum force of the engine transmitted from the drive pulley 101 via the V-belt 118 to the centrifugal clutch 200, and mainly includes a fixed driven plate 151 and a movable driven plate 154, respectively. .
- the fixed driven plate 151 is a component that is rotationally driven while being held with the V-belt 118 sandwiched with the movable driven plate 154, and is configured by forming a metal material (for example, an aluminum material) into a conical cylinder shape.
- the fixed driven plate 151 is fixedly mounted on the driven sleeve 152 in a state where the convex surface faces the movable driven plate 154 side.
- the driven sleeve 152 is a metallic cylindrical part that is rotationally driven integrally with the fixed driven plate 151, and is attached to the drive shaft 153 via a bearing so as to be relatively rotatable.
- the drive shaft 153 is a metal rotating shaft body for driving the rear wheels of the motorcycle on which the continuously variable transmission 100 is mounted via a transmission (not shown). In this case, the rear wheel of the motorcycle is attached to one end (right side in the figure) of the drive shaft 153.
- the movable driven plate 154 is a component that is rotationally driven in a state where the V belt 118 is held together with the fixed driven plate 151, and is configured by forming a metal material (for example, an aluminum material) into a conical cylinder shape.
- the movable driven plate 154 is fitted to the driven sleeve 152 in such a manner that the convex surface faces the fixed driven plate 151 and is slidable in the axial direction.
- a torque spring 155 is provided on the concave surface of the movable driven plate 154 with the drive plate 201 in the centrifugal clutch 200.
- the torque spring 155 is a coil spring that elastically presses the movable driven plate 154 toward the fixed driven plate 151 side. That is, the continuously variable transmission 100 is defined by a diameter sandwiching the V-belt 118 defined by the distance between the fixed drive plate 102 and the movable drive plate 110 and the distance between the fixed driven plate 151 and the movable driven plate 154. The engine speed is changed steplessly depending on the magnitude relationship with the diameter across the V-belt 118.
- Centrifugal clutch 200 is provided on each of the leading end sides of driven sleeve 152 and drive shaft 153.
- the centrifugal clutch 200 is a mechanical device that is not directly related to the present invention but is connected to the continuously variable transmission 100, and will be described briefly.
- Centrifugal clutch 200 is a mechanical device that transmits or interrupts the rotational driving force of the engine transmitted through continuously variable transmission 100 to drive shaft 153, and mainly includes drive plate 201, three clutch weights 203, and clutch outer 206. Are each provided.
- the drive plate 201 is a component that is rotationally driven integrally with the driven sleeve 152, and is formed by forming a metal material into a stepped disk shape.
- Three swing support pins 202 are provided in the circumferential direction on the outer edge of the disk surface of the drive plate 201, and the clutch weight 203 is supported by each of the swing support pins 202. Yes.
- the three clutch weights 203 are components for transmitting or blocking the rotational driving force from the engine to the drive shaft 153 according to the rotational speed of the drive plate 201, respectively, and a metal material (for example, zinc material) is used for the drive plate 201.
- a metal material for example, zinc material
- the clutch shoe 205 is a component for increasing the frictional force with respect to the inner peripheral surface of the clutch outer 206, and is configured by forming a friction material in a plate shape extending in an arc shape.
- Each of these clutch weights 203 is supported in a state in which the clutch shoe 205 is opposed to the inner peripheral surface of the clutch outer 206 and one end is swingable on the swing support pin 202. As a result, in the three clutch weights 203, the clutch shoe 205 comes into contact with or is separated 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 component that is rotationally driven integrally with the drive shaft 153, and is configured by forming a metal material in a cup shape covering the outer peripheral surface of the clutch weight 203 from the drive plate 201. Therefore, the clutch outer 206 transmits or blocks the rotational driving force from the engine to the drive shaft 153 when the clutch weight 203 comes into contact via the clutch shoe 205.
- the continuously variable transmission 100 functions by constituting a part of a power transmission mechanism disposed between an engine and a rear wheel serving as a driving wheel in a motorcycle vehicle (for example, a scooter).
- the elastic force generated by the pressing mechanism 130 by the resistance spring 134 always acts on the movable drive plate 110 via the displacement resistor 120, so the movable drive plate 110 is fixed to the fixed drive plate 102. Is always pressed in the direction of separating.
- the movable drive plate 110 when the engine is idling, the movable drive plate 110 is located at a position farthest from the fixed drive plate 102 (see FIGS. 1 and 2). That is, in the continuously variable transmission 100, the movable drive plate 110 is integrally rotated together with the fixed drive plate 102, the V belt 118, the pressing side holding body 131, the displacement resistance body 120, and the plate side holding body 112 in the pressing mechanism 130. .
- the centrifugal force acting on the roller weight 116 is smaller than the combined elastic force of the resistance spring 134 and the torque spring 155, so that the V belt 118 is the innermost part of the drive pulley 101.
- the movable drive plate 110 is separated from the fixed drive plate 102 by being located in the peripheral portion.
- the centrifugal force acting on the clutch weight 203 is smaller than the elastic force (tensile force) of the coupling spring 204, the clutch shoe 205 does not come into contact with the inner peripheral surface of the clutch outer 206 and the centrifugal clutch 200 is engine. Is not transmitted to the drive shaft 153.
- the continuously variable transmission 100 acts on the roller weight 116 as the engine speed increases when the engine speed increases due to the accelerator operation of the driver in the motorcycle (see FIG. 3).
- the centrifugal force becomes larger than the combined elastic force of the resistance spring 134 and the torque spring 155, and the movable drive plate 110 is displaced to the fixed drive plate 102 side.
- the movable drive plate 110 must be displaced toward the fixed drive plate 102 while resisting the elastic force of the resistance spring 134 in addition to the torque spring 155. Therefore, the continuously variable transmission 100 shifts at a higher rotational speed than a conventional continuously variable transmission that does not include the pressing mechanism 130 and the displacement resistor 120.
- the centrifugal clutch 200 when the centrifugal force acting on the clutch weight 203 becomes larger than the elastic force (tensile force) of the coupling spring 204, the clutch shoe 205 comes into contact with the inner peripheral surface of the clutch outer 206 and the engine A rotational driving force is transmitted to the drive shaft 153.
- the driver wants to change the speed change characteristics of the continuously variable transmission 100, as shown in FIGS. 8 and 9, the driver operates the operating handle to move the pressing body 141 to the outer spring holder. Tilt to the side opposite to the 135 side or the outer spring holder 135 side. As a result, the continuously variable transmission 100 compresses the resistance spring 134 when the pressing body 141 is tilted toward the outer spring holder 135 (see the broken line arrow in FIG. 8). The force which presses the plate 110 becomes strong. Therefore, since the continuously variable transmission 100 requires a large centrifugal force due to the displacement of the movable drive plate 110 toward the fixed drive plate 102, the shift timing shifts to the high rotation speed side.
- the continuously variable transmission 100 when the pressing body 141 is tilted to the side opposite to the outer spring holder 135 side (see the broken line arrow in FIG. 9), the resistance spring 134 is extended, so that the displacement resistance body 120 is The force that presses the movable drive plate 110 is weakened. Therefore, in the continuously variable transmission 100, the centrifugal force required for the displacement of the movable drive plate 110 toward the fixed drive plate 102 becomes small, and therefore the shift timing shifts to the low speed side.
- the continuously variable transmission 100 is displaced toward the fixed drive plate 102 among the fixed drive plate 102 and the movable drive plate 110 constituting the drive pulley 101. Since the load (reaction force) is directly applied to the movable drive plate 110 by the displacement resistor 120 and the pressing mechanism 130, it is possible to suppress an increase in the size, complexity, and weight of the apparatus configuration as compared with the prior art.
- the displacement resistor 120 is a round bar.
- the displacement resistor 120 only needs to be configured to abut against the movable drive plate 110 from the fixed drive plate 102 side, and is not necessarily limited to the above embodiment. Therefore, the displacement resistor 120 can be formed in a shape other than the rod, for example, a plate shape or a cylindrical shape. Further, the number of displacement resistors 120 provided is not limited to six, and may be five or less or one or more.
- the displacement resistor 120 has a stepped shape in which the plate fitting end 121 fitted to the plate side holding body 112 is made thinner than the trunk which is the previous part.
- the displacement resistance body 120 can ensure the diameter of the cone part 114 large by decreasing the diameter of the receiving hole 111a in the movable drive plate 110 while maintaining rigidity.
- the displacement resistor 120 can also be constituted by a round bar having only the same outer diameter.
- the displacement resistor 120 is configured to abut against the movable drive plate 110 via the plate side holding body 112 and the sliding material 113, respectively.
- the rigidity of the entire displacement resistor 120 can be increased and the plate-side holding body 112 is interposed.
- the movable drive plate 110 is basically driven to rotate in synchronism with the fixed drive plate 102. However, a slight deviation may occur depending on the torque difference between the engine side and the centrifugal clutch 200 side. is there. For this reason, the displacement resistor 120 can be prevented from being damaged by being provided so as to be rotatable relative to the movable drive plate 110.
- the continuously variable transmission 100 includes the sliding member 113 that reduces the friction between the plate-side holding body 112 and the movable drive plate 110, so that the displacement resistor 120 is twisted and the plate-side holding body. 112 wear and seizure between them can be suppressed.
- the sliding member 113 is a material that lowers the friction coefficient between the plate side holding body 112 and the movable drive plate 110 in addition to a material having a lower friction coefficient than the friction coefficient between the plate side holding body 112 and the movable drive plate 110 ( For example, it can be composed of lubricating oil or grease).
- the displacement resistor 120 can be configured to directly abut against the movable drive plate 110 by omitting the plate side holding body 112 and the sliding material 113, respectively. Further, the displacement resistor 120 may be configured to directly abut against the movable drive plate 110 by omitting only one of the plate side holding body 112 and the sliding material 113.
- the displacement resistor 120 is elastically pressed against the movable drive plate 110 by the pressing mechanism 130. That is, the pressing mechanism 130 corresponds to a pressing unit according to the present invention.
- the pressing means only needs to be able to elastically press the displacement resistor 120 against the movable drive plate 110, and is not necessarily limited to the above embodiment. Therefore, for example, the pressing means can comprise the resistance spring 134 by other elastic bodies such as a plurality of disc springs or urethane resin.
- the pressing means can be constituted by a pneumatic or hydraulic cylinder, an electric motor, a solenoid or a magnet. In the case where the pressing means is constituted by a pneumatic or hydraulic cylinder, an electric motor, a solenoid, and the like, a control device for controlling each of these operations may be provided.
- the continuously variable transmission 100 is configured to include the variable mechanism 140.
- the continuously variable transmission 100 can freely change the speed change characteristic by changing the pressing force by the pressing mechanism 130. That is, the variable mechanism 140 corresponds to the variable means according to the present invention.
- the continuously variable transmission 100 can be configured by omitting the variable mechanism 140.
- the continuously variable transmission 100 for example, when the pressing means is constituted by an electric motor or the like, a control device that controls each operation of the electric motor or the like corresponds to the variable means.
- Movable driven plate 155 ... Torque spring, DESCRIPTION OF SYMBOLS 200 ... Centrifugal clutch, 201 ... Drive plate, 202 ... Swing support pin, 203 ... Clutch weight, 204 ... Connection spring, 205 ... Clutch shoe, 206 ... Clutch outer.
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Abstract
Description
この無段変速機100は、ドライブプーリ101を備えている。ドライブプーリ101は、エンジンから延びるクランク軸90上に設けられてエンジンの回転駆動力によって直接回転駆動する部品であり、主として、固定ドライブプレート102および可動ドライブプレート110をそれぞれ備えて構成されている。
次に、上記のように構成した無段変速機100の作動について説明する。この無段変速機100は、自動二輪車車両(例えば、スクータ)におけるエンジンと駆動輪となる後輪との間に配置された動力伝達機構の一部を構成して機能する。この無段変速機100においては、押圧機構130が抵抗スプリング134によって発生させる弾性力が変位抵抗体120を介して常に可動ドライブプレート110に作用しているため、可動ドライブプレート110は固定ドライブプレート102に対して常に離隔する方向に押圧されている。
100…無段変速機、101…ドライブプーリ、102…固定ドライブプレート、103…円板部、103a…通し孔、104…スリーブ軸受、105…円錐部、106…ナット、107…放熱フィン、108…案内部、
110…可動ドライブプレート、111…円筒部、111a…受け穴、112…プレート側保持体、112a…保持穴、113…滑り材、114…円錐部、115…ローラ保持部、116…ローラウエイト、117…ランププレート、118…Vベルト、
120…変位抵抗体、121…プレート嵌合端部、
130…押圧機構、131…押圧側保持体、131a…保持穴、132…ベアリング、133…内側スプリングホルダ、133a…収容部、134…抵抗スプリング、135…外側スプリングホルダ、135a…収容部、
140…可変機構、141…押圧体、142…回動軸、143…入力体、144…ワイヤ、145…ハウジング、
150…ドリブンプーリ、151…固定ドリブンプレート、152…ドリブンスリーブ、153…ドライブシャフト、154…可動ドリブンプレート、155…トルクスプリング、
200…遠心クラッチ、201…ドライブプレート、202…揺動支持ピン、203…クラッチウエイト、204…連結スプリング、205…クラッチシュー、206…クラッチアウター。
Claims (6)
- エンジンによって回転駆動するクランク軸と一体的に回転駆動する固定ドライブプレートおよび同固定ドライブプレートに対向配置されて前記クランク軸の回転駆動による遠心力に応じて同クランク軸上を前記固定ドライブプレートに対して接近または離隔する可動ドライブプレートを有するドライブプーリと、
前記ドライブプーリの径方向側に対向配置されて前記エンジンの回転駆動力を出力側に伝達するドリブンプーリと、
前記ドライブプーリと前記ドリブンプーリとの間に架設される無端ベルトとを備えた無段変速機であって、
前記固定ドライブプレート側から前記可動ドライブプレートに突き当てられる変位抵抗体と、
前記変位抵抗体を前記可動ドライブプレートに弾性的に押圧する押圧手段とを備えることを特徴とする無段変速機。 - 請求項1に記載した無段変速機において、さらに、
前記押圧手段による押圧力を可変させる可変手段を備えることを特徴とする無段変速機。 - 請求項1または請求項2に記載した無段変速機において、
前記押圧手段は、コイルスプリングからなる抵抗スプリングで構成されていることを特徴とする無段変速機。 - 請求項1ないし請求項3のうちのいずれか1つに記載した無段変速機において、
前記変位抵抗体は、
棒体で構成されて前記クランク軸の周囲に周方向に沿って複数隣接配置されているとともに、
前記押圧手段側の各端部がリング状に形成された押圧側保持体と、
前記可動ドライブプレート側の各端部がリング状に形成されたプレート側保持体とで保持されていることを特徴とする無段変速機。 - 請求項4に記載した無段変速機において、さらに、
前記プレート側保持体と前記可動ドライブプレートとの間に配置されて両者間の摩擦を下げる滑り材を備えることを特徴とする無段変速機。 - 請求項1ないし請求項5のうちのいずれか1つに記載した無段変速機において、
前記変位抵抗体は、
前記固定ドライブプレートを貫通して配置されており、
前記押圧手段は、
前記固定ドライブプレートに対して前記可動ドライブプレートとは反対側に設けられていることを特徴とする無段変速機。
Priority Applications (4)
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US16/339,667 US20190234495A1 (en) | 2016-10-06 | 2017-08-08 | Continuously variable transmission |
BR112019006510A BR112019006510A2 (pt) | 2016-10-06 | 2017-08-08 | transmisssão variável contínua |
CN201780056446.8A CN109844370A (zh) | 2016-10-06 | 2017-08-08 | 无级变速器 |
EP17858064.3A EP3524851A4 (en) | 2016-10-06 | 2017-08-08 | CONTINUOUSLY VARIABLE TRANSMISSION |
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JP2016197922A JP6470723B2 (ja) | 2016-10-06 | 2016-10-06 | 無段変速機 |
JP2016-197922 | 2016-10-06 |
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WO2018066224A1 true WO2018066224A1 (ja) | 2018-04-12 |
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EP (1) | EP3524851A4 (ja) |
JP (1) | JP6470723B2 (ja) |
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JPS5135854A (en) * | 1974-07-26 | 1976-03-26 | Outboard Marine Corp | Kahendentatsukudopuurikumitatetai |
JP2012047292A (ja) * | 2010-08-27 | 2012-03-08 | Honda Motor Co Ltd | 無断変速機構造 |
JP2013210080A (ja) * | 2012-03-30 | 2013-10-10 | Musashi Seimitsu Ind Co Ltd | Vベルト式無段変速機 |
JP2013213520A (ja) | 2012-03-30 | 2013-10-17 | Honda Motor Co Ltd | 自動二輪車の無段変速機 |
JP2016037989A (ja) * | 2014-08-06 | 2016-03-22 | 本田技研工業株式会社 | 車両用vベルト式無段変速機 |
Family Cites Families (3)
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US3996811A (en) * | 1974-01-07 | 1976-12-14 | Scorpion, Inc. | Speed and torque sensitive clutch assembly |
JP2010151237A (ja) * | 2008-12-25 | 2010-07-08 | Kawasaki Heavy Ind Ltd | Vベルト式無段変速機 |
JP6461468B2 (ja) * | 2013-11-22 | 2019-01-30 | Ntn株式会社 | Vベルト式無段変速機 |
-
2016
- 2016-10-06 JP JP2016197922A patent/JP6470723B2/ja active Active
-
2017
- 2017-07-21 TW TW106124660A patent/TWI732907B/zh active
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- 2017-08-08 CN CN201780056446.8A patent/CN109844370A/zh active Pending
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Patent Citations (5)
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JPS5135854A (en) * | 1974-07-26 | 1976-03-26 | Outboard Marine Corp | Kahendentatsukudopuurikumitatetai |
JP2012047292A (ja) * | 2010-08-27 | 2012-03-08 | Honda Motor Co Ltd | 無断変速機構造 |
JP2013210080A (ja) * | 2012-03-30 | 2013-10-10 | Musashi Seimitsu Ind Co Ltd | Vベルト式無段変速機 |
JP2013213520A (ja) | 2012-03-30 | 2013-10-17 | Honda Motor Co Ltd | 自動二輪車の無段変速機 |
JP2016037989A (ja) * | 2014-08-06 | 2016-03-22 | 本田技研工業株式会社 | 車両用vベルト式無段変速機 |
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TWI732907B (zh) | 2021-07-11 |
US20190234495A1 (en) | 2019-08-01 |
CN109844370A (zh) | 2019-06-04 |
BR112019006510A2 (pt) | 2019-06-25 |
EP3524851A4 (en) | 2020-06-17 |
TW201814183A (zh) | 2018-04-16 |
JP6470723B2 (ja) | 2019-02-13 |
EP3524851A1 (en) | 2019-08-14 |
JP2018059581A (ja) | 2018-04-12 |
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