WO1997005402A1 - Poulie pour vitesse variable - Google Patents

Poulie pour vitesse variable Download PDF

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Publication number
WO1997005402A1
WO1997005402A1 PCT/JP1996/002136 JP9602136W WO9705402A1 WO 1997005402 A1 WO1997005402 A1 WO 1997005402A1 JP 9602136 W JP9602136 W JP 9602136W WO 9705402 A1 WO9705402 A1 WO 9705402A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulley
surface forming
forming members
continuously variable
diameter
Prior art date
Application number
PCT/JP1996/002136
Other languages
English (en)
Japanese (ja)
Inventor
Toshio Okamura
Katsuhisa Ootsuka
Takeshi Maekawa
Original Assignee
Toshio Okamura
Otsuka Katsuhisa
Takeshi Maekawa
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 Toshio Okamura, Otsuka Katsuhisa, Takeshi Maekawa filed Critical Toshio Okamura
Publication of WO1997005402A1 publication Critical patent/WO1997005402A1/fr

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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
    • 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
    • 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
    • F16H55/54—Pulleys or friction discs of adjustable construction of which the bearing parts are radially adjustable

Definitions

  • the present invention relates to a continuously variable transmission pulley whose diameter can be changed steplessly, and more particularly to a continuously variable transmission burley that receives not the both end surfaces of the belt but the inner peripheral surface of the belt.
  • a special wide V-belt 303 is mounted around a continuously variable pulley 301 and a continuously variable pulley 302.
  • a fixed pulley 305 having a cone surface 305a, a movable pulley 306 having a similar cone-shaped pulley surface 306a, and a diaphragm-type fluid pressure actuator 307 for moving the movable pulley 306 in the axial direction.
  • the pulley 302 includes a shaft 308, a fixed pulley 309 having a cone-shaped pulley surface 309a, a movable pulley 310 having a cone-shaped pulley surface 310a, and a spring 311 for urging the movable pulley 310 toward the fixed pulley 309. Having.
  • the V-belt 303 is mounted so as to be sandwiched between a pair of pulley surfaces 305a and 306a of the pulley 301, and is mounted so as to be sandwiched between a pair of pulley surfaces 309a and 310a of the pulley 302.
  • the pulley shown in Fig. 15 is also in practical use as a continuously variable pulley to which a standard V-belt can be applied.
  • the continuously variable pulley 320 is a relay pulley, and changes its speed by changing the pulley diameter for the V-belt 321 and the pulley diameter for the V-belt 322.
  • the continuously variable pulley 320 includes a main pulley 323 integrally connected with a cone-shaped first pulley surface 323a and a second bulge surface 323b, and a cone-shaped pulley externally provided with the It has a movable pulley 324 having surfaces 324a and 324b, and because the width of the V-belts 321, 322, which are standard V-belts, is small, the interference between the bully surface 323a and the pulley surface 324a, Interference with 324b is likely to occur.
  • cuts 325 and pulley surface forming portions 326 are formed alternately at a plurality of circumferential positions of the pulley surfaces 323a, 323b, 324a, 324b, and the pulley surface forming portion 326 is connected to the pulley surface of the mating side.
  • the continuously variable pulley is not structured to support the inner peripheral surface of the V-belt as described above, but is essentially structured to support both end surfaces of the V-belt. No solid annular portion is formed to support the inner peripheral surface of.
  • slippage is likely to occur due to the small contact area between the belt and the pulley, and when the belt tension is large, the compressive force also increases and the driving force transmission efficiency decreases. There is a problem that there is a limit to increasing the gear ratio.
  • a continuously variable transmission pulley includes: a shaft member; and a pair of opposed bully bodies supported by the shaft member such that the shaft member cannot rotate relative to each other and can change an axial distance.
  • a plurality of pulley surface forming members that respectively form a part of a taper pulley surface that reduces the diameter substantially linearly toward the opposing pulley body, and a plurality of burry surface forming members of one pulley body and the other.
  • the plurality of bully surface forming members of the bully body are disposed so as to partially wrap in the axial direction and alternately lie in the circumferential direction, and are adjacent to each other in the circumferential direction within the wrapped area.
  • Part of the pulley surface forming members are formed so as to make surface contact with each other, and a plurality of surface contact portions arranged in the circumferential direction are provided at least inside the pair of pulley bodies at the minimum diameter of the pulley surface and near both sides in the axial direction.
  • a solid annular section is formed containing 1
  • the pair of bully bodies are configured to receive the inner peripheral surface of the belt at the minimum diameter of the pulley surface and the vicinity of both sides in the axial direction, and to support the belt tension through a solid annular portion. .
  • the pulley surface forming member may be formed as a rod member inclined with respect to the shaft member, or may be formed as a tapered plate member whose thickness decreases toward the shaft member.
  • the plurality of pulley surface forming members of each pulley body are formed by dividing every 2 n (where n is an arbitrary positive integer) the tapered pulley surface in the circumferential direction into every other 2 n partial taper pulley surfaces.
  • the force ⁇ desired is that it is configured to form n partial tapered pulley surfaces.
  • each pulley surface forming member of each pulley body is an inclined rod member
  • the cross-sectional shape of each pulley surface forming member on each surface orthogonal to the shaft member is centered on the axis of the shaft member. It is formed so as to occupy at least a predetermined range portion on the outer peripheral side of a sector shape obtained by equally dividing a circle by 2 n in the circumferential direction.
  • each of the pulley surface forming members is a rod member
  • the small-diameter-side end portions of the n pulley surface forming members are fixed to each pulley body, and the n bury surfaces of the mating burri body are attached to each pulley body.
  • the annular member includes n pulley surface forming portions of a mating pulley body. It may have a substantially cone-shaped recess that can accommodate most of the material.
  • each pulley surface forming member of each pulley body is a tapered plate member
  • a spline shaft portion having a predetermined length is formed in the shaft member in the axial direction, and each bully surface of a pair of pulley bodies is formed.
  • the forming member is formed as a taper plate member having an inner side along the shaft member and decreasing in thickness toward the shaft member, and a small-diameter side end of each pulley surface forming member is formed at a free end, and at least It is highly desirable that one of the bully members near the inner side of each bully surface forming member is engaged with a spline groove of the spline shaft. Further, it is desirable that the annular member of each pulley body and the n bulging surface forming members are integrally formed.
  • FIG. 1 is a side view of a continuously variable transmission according to a first embodiment of the present invention
  • FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG. 4 is a perspective view of the pulley body
  • FIG. 5 is a perspective view of a pulley surface forming member
  • FIG. 6 is a side view of the continuously variable transmission of the second embodiment
  • FIG. FIG. 8 is a longitudinal sectional view of the continuously variable boogie on the drive side of the continuously variable transmission
  • FIG. 8 is a longitudinal sectional view of the continuously variable boogie on the driven side of the continuously variable transmission of FIG. 6, and FIG. FIG.
  • FIG. 10 is a sectional view taken along line IX-IX of FIG. 6, FIG. 10 is an enlarged view of a main part of FIG. 9, FIG. 11 is a diagram corresponding to FIG. 10 of a modified example, and FIG. FIG. 13 is a front view of a main part when the body is viewed from the axial direction, FIG. 13 is a longitudinal sectional view of a main part of the pulley body of FIG. 12, and FIG. 14 is a cross-sectional view of a continuously variable transmission according to the related art; Figure 15 shows the side of the conventional continuously variable boogie It is a diagram. BEST MODE FOR CARRYING OUT THE INVENTION
  • the continuously variable transmission 1 has a drive-side continuously variable transmission burley 2, a drive mechanism 3 for changing the pulley diameter of the pulley 2, and a driven-side continuously variable transmission
  • a pulley 4 a drive mechanism 5 for changing the diameter of the pulley 4
  • an endless belt 6 mounted on the pulleys 2, 4, a tension adjusting mechanism 7, a casing 8, and the like.
  • the drive-side bully 2 has a drive shaft 11 having a spline shaft portion 12 of a predetermined length,
  • the spline shaft portion 12 has a pair of pulley bodies 10 L and 10 R externally fitted to each other so as to face each other, bearings 13 and 14 for supporting the drive shaft 11, and the like.
  • the pulley body 10 L, 1 OR is made of a metal material (for example, steel or aluminum alloy).
  • An input shaft is connected to the drive shaft 11 and driving force is input from the input shaft.
  • the pulley bodies 10 L and 1 O R have the same structure, and are provided so as to be partially wrapped in the axial direction so as to face each other and to cross each other with a phase shift of 15 °. Therefore, the Boolean field 10L will be described as an example.
  • the pulley body 10 L is composed of a large-diameter annular member 15 spline-fitted to the spline shaft 12 and a small-diameter spline fitted to the spline shaft 12 on the inner peripheral side of the pulley body 1 OR. And two pulley surface forming members 30 fixed to both ends of the annular member 15 and the cylindrical member 25 and arranged at regular intervals in the circumferential direction.
  • the annular member 15 is formed by integrally forming an annular portion 16 and a cone portion 18 and a cylindrical portion 19 projecting from the inner peripheral portion of the annular portion 16 to a side opposite to the pulley body 1 OR. Inside the part 18 and the cylindrical part 19, there is an almost cone capable of accommodating most of the cylindrical member 25 of the pulley body 1 OR and the two bulging surface forming members 30 (30b). A cylindrical recess 20 is formed, and a square groove 21 is formed on the outer peripheral surface of the cylindrical portion 19. Also, at the part stage, the annular portion 16 of the annular member 15 has one fitting groove 17 for fitting the large-diameter end of the two bulging surface forming members 30. They are formed at equal intervals in the circumferential direction (see Fig. 4).
  • the cylindrical member 25 is a thick-walled cylindrical member.
  • the small-diameter side end portions 32 of the two pulley surface forming members 30 are provided on the outer peripheral portion of the cylindrical member 25.
  • the two fitting grooves 26 to be fitted are formed at regular intervals in the circumferential direction.
  • the two pulley surface forming members 30 are tapered pulley surfaces that linearly reduce the diameter from the outer peripheral portion of the annular portion 16 of the annular member 15 toward the mating pulley body 10 R in the circumferential direction.
  • 12 alternate partial taper pulley surfaces 33 are formed.
  • the tapered pulley surface may have a shape in which the diameter is reduced substantially linearly.
  • Each pulley surface forming member 30 has a cross-sectional shape on each surface orthogonal to the drive shaft 11 in the axial range corresponding to the tapered pulley surface, and a partial taper pulley surface from the axis of the drive shaft 11 on each surface.
  • a circle whose radius is the distance to 33 is divided into 24 equal parts in the circumferential direction -It is formed in a shape that occupies at least a predetermined range on the outer circumference side of the fan shape (a trapezoidal shape in which the inner and outer sides are arcs) (see Figs. 2 and 5).
  • a fitting portion 31 is formed at the large-diameter end of each pulley surface forming member 30 so as to be fitted into the fitting groove 17 and fixed by welding or the like, and a fitting groove is formed at the small-diameter end.
  • a fitting portion 32 is formed which is fitted to 26 and fixed by welding or the like 5.
  • the angle 0 from the partially tapered pulley surface 33 of each pulley surface forming member 30 to the axis of the drive shaft 11 is 45 °, and this angle 0 is a force that can be set to an arbitrary angle of 75 ° or less. It is strongly desirable to set the angle to about 30 to 60 ° (see Fig. 5).
  • the bulge surface forming member 30a of the pulley body 10L and the pulley surface forming 0 member 30b of the pulley body 10R partially wrap in the axial direction and are alternately located in the circumferential direction. So that it is mounted on the drive shaft 11. Therefore, at the parts stage, two primary assemblies in which the fitting portions 32 of the two pulley surface forming members 30a and 30b are respectively fixed to the corresponding second annular members 25 are manufactured. After combining the two primary assemblies in a cross shape, the fitting portions of the two pulley surface forming members 30a are fitted and fixed to the force ring members 15, and similarly, The fitting portions 32 of the two pulley surface forming members 3 Ob are fitted and fixed to the annular member 15.
  • the adjacent pulley surface forming member 30a and the burley surface forming member 30b is in surface contact with the bulge surface diameter minimum portion 36 and a solid annular portion 35 is formed inside the vicinity of both sides in the axial direction 0.
  • the outermost peripheral portion of the annular portion 35 is the minimum diameter portion 36.
  • the minimum diameter portion 36 and the adjacent portions on both sides in the axial direction receive the inner peripheral surface of the belt 6 and support the belt tension via a solid annular portion 35.
  • the diameter of the smallest diameter part 36 is referred to as a pulley diameter.
  • the pulley surface forming members 30a and 30b may be formed in a tapered plate-shaped member instead of the square rod-shaped portion 5 as illustrated.
  • the number of pulley surface forming members 30a, 30b in each pulley body 10L, 10R is not limited to 12, but can be any number. From the viewpoint of, it is desirable to set it to about 8 to 18.
  • the angle 15 degrees of Ob shown in FIG. 5 may be formed smaller by a small angle.
  • the drive mechanism 3 uses a left-handed ball screw shaft 4 1 and a right-handed ball screw shaft 4 2
  • the diameter of the pulley can be freely controlled by controlling the electric motor 51 based on a detection signal from the rotary encoder 52 by a control unit (not shown).
  • the drive mechanism 3 is merely an example, and a stepping motor may be used instead of the motor 51 and the rotary encoder 52, or a pair of fluid pressure actuators (a diaphragm type actuator or a fluid pressure cylinder) Etc.) and a detector that detects the movement amount of the fluid pressure actuator or the distance between the pair of pulleys 10 L, 1 OR, and the detector of the fluid pressure actuator and the pair of fluid pressure actuators symmetrically.
  • a driving fluid pressure supply system may be applied.
  • the continuously variable pulley 4 on the driven side includes a driven shaft 61 and a spline shaft portion of the driven shaft 61.
  • the pulley body 60L, 6OR is made of a metal material (for example, steel or aluminum alloy).
  • the driven shaft 61 is supported by bearings 63, 64, and is connected to the driven shaft 61 by an output shaft 68 outputting a driving force from the driven shaft 61 and a power bra 67.
  • the structure of the pair of pulley bodies 60L, 60R is the same as the structure of the pair of pulley bodies 10L, 10R, and functions in the same manner, so that the description is omitted.
  • pulley body 60 L annular member 1 5, a cylindrical member 25, a pulley surface forming member 30a, an annular member 15 of a pulley body 60R, a cylindrical member 25, and a pulley surface forming member 30b are illustrated.
  • the drive mechanism 5 for driving the pair of bulge bodies 60 L and 60 R of the driven side continuously variable transmission burley 4 in the axial direction has the same structure as that of the drive mechanism 3, and therefore the description is omitted.
  • a ball screw shaft 40 A, fork parts 46 A and 49 A, an electric motor 51 A, and a rotary encoder 52 A are illustrated.
  • the driving mechanism 5 is also merely an example, and various driving mechanisms similar to the above can be applied.
  • the tension adjusting mechanism 7 will be described.
  • the driving pulley 4 When the belt 6 is not stretched, the driving pulley 4 has the minimum pulley diameter and the driven pulley 4 has the maximum pulley diameter in a state where the belt 6 is not stretched. Is set. Assuming this belt length, the pulley diameter of the pulley 4 is controlled according to the pulley diameter of the pulley 2. Therefore, the tension adjusting mechanism 7 is for absorbing the elongation of the belt 6 due to the use of the continuously variable transmission 1, and elastically urges the tension pulley 70 and both ends of the tension pulley 70. And a tension spring 71. The other end of each tension spring 71 is connected to a pin member 72 fixed to the casing 8.
  • the belt 6 is an endless belt having a pentagonal cross section. If the tension acting on the belt 6 is large, a reinforcing member such as a plurality of endless wires is provided inside. Further, in order to suppress the slip, a magnetic material powder is mixed with the rubber material of the belt 6 to form a belt having a magnetized magnetic force, and the magnetic force causes the pulley surface forming member 30 to be attracted to the belt. You may comprise. However, as the belt 6, besides a belt having a normal structure, a metal belt which does not easily stretch or a belt having other various structures can be applied.
  • the ridges should be rounded to a radius of about 0.5 to imm. Is desirable.
  • the casing 8 is configured to be dividable on a surface including the bearings 13, 14, 63, and 64, and is integrally connected by a plurality of bolts 74.
  • the pulley diameter of the drive-side pulley 2 is set to the minimum and the pulley diameter of the driven-side pulley 4 is set to the maximum, the reduction ratio becomes maximum, and the former pulley diameter is increased from that state.
  • the reduction ratio continuously decreases, and when the pulley diameters of both become equal, the reduction ratio becomes 1. From this state, the speed increase ratio continuously increases as the diameter of the former pulley is increased and the diameter of the latter pulley is reduced.
  • both ends of the pulley surface forming members 30 a, 30 b are fixed to the first annular member 15 and the second annular member 25, respectively. Since the cylindrical member 25 is spline-fitted to the spline shaft portion 12, torque is reliably transmitted between the drive shaft 11 and the pulley surface forming members 30a, 30b. Torque is reliably transmitted between the surface forming members 30a and 30b and the belt 6 via a frictional force.
  • Pulley surface forming members 30a, 30b are supported at both ends, and solid annular portions 35 are formed at their intersections, so that pulley surface forming members 30a, 30b are reduced in diameter.
  • a large torque can be transmitted while strongly supporting the wide inner peripheral surface of the belt 6 without deforming to the side and withstanding a large belt tension. Since the pulley surface forming member 30a and the pulley surface forming member 30b are intermittently arranged in the circumferential direction over the entire length of the tapered pulley surface, they are almost the same as the toothed pulley. In addition, slip is less likely to occur between the small bell 6 and the pulley body 10L, 1OR, which increases the torque transmission efficiency and provides excellent torque transmission performance.
  • the continuously variable transmission 1 can be applied as a continuously variable transmission for an automobile and can be applied as a continuously variable transmission for various other mechanical devices.
  • the pulley body 10 L and the pulley body 60 R are supported on the drive shaft so as not to be movable in the axial direction, and the pulley body 60 L is compressed by the compression spring to the bulge body 60 R. And pull the pulley body 10 R to the fluid pressure actuator (fluid pressure Axial actuators, diaphragm actuators, etc.) or other actuators are configured to be driven to move in the axial direction.
  • the fluid pressure actuator fluid pressure Axial actuators, diaphragm actuators, etc.
  • the continuously variable transmission 210 has a drive-side continuously variable pulley 211 and a drive for changing the pulley diameter of the pulley 211. Change in the pulley 2 1 4 of the mechanism 2 1 2, the continuously variable pulley 2 13 on the driven side, the endless belt 2 1 4 mounted on the pulley 2 1 1 and the pulley 2 1 3, and the pulley 2 1 1 And an elastic biasing mechanism 215 for changing the diameter of the pulley of the bully 213 according to the condition.
  • the drive-side pulley 2 1 1 has a drive shaft 2 2 1 having a predetermined length of a spline shaft 2 2 2, and a spline shaft 2 2 2 which is movable in the axial direction.
  • Movable pulley body 220L fitted externally, fixed pulley body 22OR fixed externally to spline shaft part 222 to be axially immovable, and bearing for supporting drive shaft 222 2 3, 2 2 4 etc.
  • the movable pulley body 220L is composed of a plate-like bully surface forming member 230 with 12 tapers arranged at equal intervals in the circumferential direction, and a pulley surface forming member 230.
  • the annular portion 232 connected to the radial end portion is integrally formed by a method such as die construction using a material such as an aluminum alloy.
  • Each pulley surface forming member 230 has an inner side along the surface of the drive shaft 221, and as shown in FIGS. 9 and 10, the engaging portion near the inner side is a spline shaft portion. It is engaged with the half width portion of the 222 spline groove.
  • An annular square groove 2 34 is formed in the annular portion 2 32, and a fixed pulley 2 220 R is provided between the adjacent pulley surface forming members 230 a of the movable pulley 2 220 L.
  • An accommodation hole 235 capable of accommodating most of the pulley surface forming member 230b is formed, and each accommodation hole 235 is opened with an opening 235a.
  • Each of the pulley surface forming members 230 has a cross-sectional shape on each surface orthogonal to the drive shaft 222 in the axial range corresponding to the tapered pulley surface, and a portion from the axis of the drive shaft 222 on each surface. It is formed in a shape that occupies most of the sector shape obtained by dividing a circle whose radius is the distance to the tapered pulley surface 2 3 1 into 24 in the circumferential direction, and from the partial tapered pulley surface 2 3 1 of each pulley surface forming member 2 30
  • the angle 0 to the axis of the drive shaft 22 1 is 50 °. However, this angle 0 is 75. Any of the following angles may be set.
  • each program The small diameter side end of the W-plane forming member 230 is formed as a free end.
  • the fixed pulley body 22 OR has substantially the same structure as the movable pulley body 220 L, but the fixed pulley body 22 OR has an annular portion 23 2 and an opposite side to the movable pulley body 22 L.
  • a protruding cone portion 236 is integrally formed. Between the fixed pulley body 2 2 OR adjacent pulley surface forming member 23 Ob, there is an accommodation hole that can accommodate most of the pulley surface forming member 230 a of the movable pulley body 220 L 238 are formed, and each accommodation hole 238 extends to the inside of the cone portion 236.
  • the fixed pulley body 22 OR is mounted on the drive shaft 22 1 so as to be opposed to the movable pulley body 220 L and partially wrapped in the axial direction at a phase difference of 15 °. 0, and the small-diameter end of the cone 2 36 is fixed between the spline shaft 2 2 2 of the drive shaft 2 2 1 and the bearing 2 2 4 so that the fixed pulley 2 2 Is immovable.
  • the small-diameter end of the cone portion 2336 may be fitted to the spline shaft portion 222 to regulate the position so as not to move in the axial direction.
  • the portion where the movable pulley body 220 L and the fixed pulley body 22 OR are wrapped has the adjacent pulley surface forming member 230 a and the pulley surface forming member 2.
  • a part of 30b is in surface contact with each other to form a solid annular part 237 that reaches the surface of the spline shaft part 222, and this solid annular part 237 is at least a pulley. It is formed inside the smallest surface diameter portion 238 and the vicinity of both sides in the axial direction.
  • the outermost peripheral portion of the annular portion 237 has a minimum diameter portion 238, and the minimum diameter portion 238 and the vicinity of both sides in the 0-axis direction receive the inner peripheral surface of the belt 214.
  • the belt tension is supported via a solid annular portion 237.
  • the drive mechanism 212 is for driving the movable pulley body 220L in the axial direction to change the pulley diameter of the pulley 211, and the bearing 222 and the annular portion
  • the three hydraulic cylinders 240 arranged at intervals of 120 ° in the circumferential direction between the outer peripheral part of the two cylinders and the piston rods of each hydraulic cylinder 240 It has a connecting member 244 for connecting the distal end portion to the movable pulley body 220L, and a guide member 248 for guiding each connecting member 244 in the axial direction.
  • the base end of the hydraulic cylinder 240 is pin-connected to the case of the bearing 223 via a bracket 242, and the distal end of the piston rod 241 of the hydraulic cylinder 240 is connected. It is connected to the connecting member 2 4 4.
  • the connecting member 244 includes a connecting portion 245, an engaging portion 246, and a guide portion 247.
  • the connecting metal fitting 243 at the distal end of the piston rod 241 is connected to the connecting portion 244.
  • the pin 2 is connected to the pin 5 and the engaging portion 246 is slidably engaged with the square groove 234, and the guide portion 247 is guided in the T groove of the guide member 248 movably in the axial direction. It has been.
  • the guide member 248 has a predetermined length in the axial direction and is fixed to the casing.
  • each hydraulic cylinder 240 is connected to a hydraulic supply source (not shown), and a flow control valve and a directional control valve of the hydraulic supply source are connected to a control unit (not shown). , The three hydraulic cylinders 240 are synchronously driven in the same direction.
  • the driven-side continuously variable transmission burley 2 13 includes a driven shaft 25 1 supported by bearings 25 3 and 25 4, and a spline shaft portion 25 of the driven shaft 25 1.
  • 2 has a fixed pulley body 250 L externally fitted to and fixed to 2, and a movable pulley body 25 OR externally fitted to the spline shaft portion 25 2 in the axial direction and fixed.
  • 250 L has the same structure as the fixed pulley body 220 R
  • the movable pulley body 250 R has almost the same structure as the movable pulley body 220 L. And the description is omitted.
  • the pulleys 2 11 and 2 13 are arranged so that the endless belt 2 14 mounted on the pulleys 2 1 1 and 2 13 is orthogonal to the driven shaft 2 5 1.
  • the bearings 2 23, 2 24, 25 3, and 25 4 are supported by a casing.
  • the ends of the drive shaft 22 1 and the driven shaft 25 1 are connected to the drive input shaft and the output Each is connected to a shaft.
  • the elastic biasing mechanism 2 15 has a compression spring 2 65 for biasing the movable bully body 250 R toward the fixed bully body 250 L side, the tension of the endless belt 2 14 and the spring 2. With the biasing force of 65, the pulley diameter of the pulleys 2 13 is changed.
  • the spring 2 65 is mounted between the annular portion 2 32 of the movable pulley body 25 OR and the disk member 26 1 fixed to the driven shaft 25 1, and one end of the spring 26 5 is annular.
  • the other end of the spring 265 is fitted into the annular groove 263 of the disk member 261, which fits inside the ring member 260 fixed to the part 232. Note that a thick cylindrical portion 26 2 is formed on the disk member 26 1, and the cylindrical portion 26 2 is axially moved to the driven shaft 25 1 by screws 26 4. Fixed to impossible.
  • the continuously variable transmission 210 the same as the continuously variable transmission 1 according to the embodiment is applied.
  • the action and effect Further, the structure of the pulley bodies 220 L, 220 R, 250 L, and 250 R is simplified, the manufacturing cost can be reduced, and the small diameter side end of the pulley surface forming member 230 is further reduced. Is a free end, so pulleys 2 1 1 and 2 1 3 can be easily assembled.
  • only the pulley surface forming member of one pulley body may be engaged with the spline shaft.
  • the pulley 211 may be a driven pulley and the pulley 215 may be a drive pulley.
  • the pulley body may be made of a synthetic resin material having excellent strength.
  • a cone portion may be integrally formed with the movable pulley body 220L, 25OR as required. Further, for some reason, in each of the pulleys 211 and 213, the fan-shaped opening angle of the pulley surface forming member 230a (or 230b) (the opening angle corresponding to 15 degrees in FIG. 5). Angle) may be increased by a small angle, and the fan-shaped open angle of the pulley surface forming member 230b (or 230a) may be formed as small as a small angle. Alternatively, various hydraulic or motorized actuators may be applied.
  • the tapered pulley surface may have a shape in which the diameter is reduced completely completely linearly with respect to the opposing pulley body, or a shape in which the diameter is reduced substantially linearly.
  • the continuously variable transmission 210 can be applied as a continuously variable transmission for automobiles, and can be applied as a continuously variable transmission for various mechanical devices.
  • each of the eighteen bully surface forming members 286 of each bully body 285 has an open angle of 10 when viewed from the axial direction. It has a fan shape. In the portion on the maximum diameter side of each pulley body 285, the circumferential interval between adjacent pulley surface forming members 286 becomes large. Therefore, in order to reduce the distance, an auxiliary pulley surface forming member 287 is provided between the adjacent pulley surface forming members 286, and the auxiliary pulley surface forming member 287 is formed in an annular shape of the annular member 288. It is formed integrally with the part 288a.
  • the auxiliary pulley surface forming member 287 reaches a position approximately 12 radii from the outer peripheral portion of the pulley body 285, and has a substantially fan shape when viewed from the axial direction, forms a part of the tapered cone surface, and The side is formed in parallel with the shaft member 298.
  • Each of the pulley surface forming members 286 is formed with a housing portion 290 in which the auxiliary pulley surface forming member 287 of the mating pulley body is fitted. 0 is substantially fan-shaped when viewed from the axial direction, and when the auxiliary pulley surface forming member 286 of the mating pulley is inserted into the accommodating portion 290, one pulley member 285 is formed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
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Abstract

Poulie (2) pour vitesse variable dans une transmission à vitesse variable qui possède un axe d'entraînement (11) doté à son tour d'une partie cannelée (12) d'une longueur requise, une paire de corps (10L, 10R) de poulie montés sur ladite partie cannelée (12) de manière à se faire face et des paliers (13, 14) destinés à porter l'arbre d'entraînement (11), l'espace axial entre les corps (10L, 10R) de poulie pouvant être modifié par un mécanisme d'entraînement (3). Le corps (10L) de poulie possède douze éléments (30a) formant une surface de poulie conique dont le diamètre réduit de manière linéaire en direction du corps de poulie opposé, ainsi qu'un élément annulaire (15) et un élément tubulaire (25) à l'endroit où sont fixées les extrémités opposées des éléments formant la surface de poulie. De même, le corps (10R) de poulie possède douze éléments (30b) formant une surface de poulie et un élément annulaire (15), ainsi qu'un élément tubulaire (25) là où sont fixées les extrémités opposées des éléments formant une surface de poulie. Les éléments (30a, 30b) formant une surface de poulie sont disposés alternativement dans une direction circonférentielle de manière à se chevaucher dans une direction axiale, et les éléments adjacents (30a, 30b) sont mis en contact de surface au niveau de leurs parties d'intersection, afin de former une partie annulaire pleine (35) à proximité d'une face circonférentielle interne d'une partie de diamètre plus petit (36). La surface circonférentielle interne d'une courroie (6) est portée par la partie (36) de plus petit diamètre et les parties situées près de ses faces axiales opposées, et la tension de la courroie est supportée par la partie annulaire pleine (35).
PCT/JP1996/002136 1995-07-25 1996-07-25 Poulie pour vitesse variable WO1997005402A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP21002495A JPH11230286A (ja) 1995-07-25 1995-07-25 無段変速用プーリ
JP7/210024 1995-07-25

Publications (1)

Publication Number Publication Date
WO1997005402A1 true WO1997005402A1 (fr) 1997-02-13

Family

ID=16582561

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/002136 WO1997005402A1 (fr) 1995-07-25 1996-07-25 Poulie pour vitesse variable

Country Status (2)

Country Link
JP (1) JPH11230286A (fr)
WO (1) WO1997005402A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2366339A (en) * 2000-09-01 2002-03-06 John David Ivor Locke Variable diameter pulley
CN107100983A (zh) * 2017-05-26 2017-08-29 中南大学 可变中高带轮
CN108194589A (zh) * 2018-03-09 2018-06-22 武汉逸飞激光智能装备有限公司 一种膨胀型皮带轮及无级变速器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3162481B1 (fr) 2014-06-24 2022-12-21 Sumitomo Electric Hardmetal Corp. Outil de coupe et corps d'outil
WO2017124207A1 (fr) * 2016-01-22 2017-07-27 吉好依轨 Transmission croisée bidirectionnelle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5519889U (fr) * 1978-07-25 1980-02-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5519889U (fr) * 1978-07-25 1980-02-07

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2366339A (en) * 2000-09-01 2002-03-06 John David Ivor Locke Variable diameter pulley
CN107100983A (zh) * 2017-05-26 2017-08-29 中南大学 可变中高带轮
CN107100983B (zh) * 2017-05-26 2023-05-30 中南大学 可变中高带轮
CN108194589A (zh) * 2018-03-09 2018-06-22 武汉逸飞激光智能装备有限公司 一种膨胀型皮带轮及无级变速器

Also Published As

Publication number Publication date
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