WO2011061850A1 - 押圧式伝動ベルト - Google Patents
押圧式伝動ベルト Download PDFInfo
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- WO2011061850A1 WO2011061850A1 PCT/JP2009/069696 JP2009069696W WO2011061850A1 WO 2011061850 A1 WO2011061850 A1 WO 2011061850A1 JP 2009069696 W JP2009069696 W JP 2009069696W WO 2011061850 A1 WO2011061850 A1 WO 2011061850A1
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- WIPO (PCT)
- Prior art keywords
- ring
- belt
- contact
- transmission belt
- width direction
- Prior art date
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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
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G5/00—V-belts, i.e. belts of tapered cross-section
- F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
Definitions
- the present invention relates to a pressure transmission belt that transmits power between two pulleys by sequentially pressing the preceding element with each element.
- a pressure type transmission belt is known as a power transmission belt used for a belt type continuously variable transmission or the like.
- this type of pressure-type transmission belt has a ring or hoop in which a large number of plate-like pieces (hereinafter referred to as elements) called elements or blocks are aligned with each other and arranged in an annular shape.
- elements plate-like pieces
- a band hereinafter referred to as a ring.
- the left and right side surfaces of the element are so-called flank surfaces formed in a V shape corresponding to the V groove of the pulley. Then, the flank surface is in contact with the surface of the V groove in the pulley, and torque is transmitted at the contact portion.
- the continuously variable transmission belt described in Japanese Patent No. 3406283 is formed with a metal ring assembly (metal ring) in which a plurality of endless metal rings are stacked, and a ring slot into which the metal ring is fitted.
- a belt for a continuously variable transmission that is wound around a driving pulley and a driven pulley to transmit a driving force between the pulleys, and includes a metal ring and an innermost metal ring. Crowning is applied to the saddle surface of the ring slot to be supported. The crowning radius of the metal ring is set to be smaller than the crowning radius of the saddle surface.
- Japanese Laid-Open Patent Publication No. 1-312247 has at least one non-metallic endless core (ring) that is flexible and does not substantially extend in the longitudinal direction, and a groove into which the ring is fitted.
- Japanese Patent Application Laid-Open No. 1-312247 describes that the non-metallic ring is formed based on an elastomer or rubber.
- JP 2001-317594 A discloses a thin metal ring composite (ring) in which a plurality of thin metal rings are stacked in the thickness direction to form a metal belt (transmission belt) together with a number of blocks (elements). And a thin metal ring of a metal belt configured to reduce a stress generated at a contact portion between the pulley and the ring by forming a curved surface at a portion where the innermost ring contacts with the pulley. Is described.
- Japanese Patent Application Laid-Open No. 2002-168305 discloses a plate-like element that forms a continuously variable transmission belt together with a belt-like ring, and is formed with a saddle surface that contacts the ring.
- an element of a continuously variable transmission belt including a body portion and a pillar portion formed so as to extend from the saddle surface, and a curved surface extending in an arc shape in the belt width direction is formed on the saddle surface.
- the curved surface of the element is formed of a main surface having a curvature radius Ra with which the ring mainly abuts, and an end surface having a curvature radius Rb smaller than the curvature radius Ra provided on the pillar portion side of the main surface. Describes that the stress generated at the contact portion between the ring and the element is dispersed.
- the pressing transmission belt is required to have a relatively large transmission torque capacity such as a belt continuously variable transmission for an automobile. Adopted for transmission equipment. Therefore, the metal ring constituting the pressing type transmission belt has a conflict between sufficient strength and rigidity for holding the element in an annular shape and flexibility and flexibility for smoothly winding the pulley. Two properties are required. For this reason, a plurality of metal thin belt-like single-ring rings 101 such as the metal ring assembly in the transmission belt described in Japanese Patent No. 3406283 and the ring shown in FIG. 7 are laminated. A ring is configured as the laminated ring 100. By doing so, a ring having high strength and moderate flexibility can be configured.
- the saddle surface of the element is crowned so that when the transmission belt travels, the saddle surface and the innermost circumferential surface of the ring
- the ring is centered on the saddle surface of the element by the action of the frictional force therebetween. Therefore, the side end surface of the ring can be prevented from coming into contact with the neck portion or the column portion of the element or the V-groove surface of the pulley, thereby preventing uneven wear and deterioration of durability. It is said that.
- the transmission belt using the metal ring assembly or the laminated ring 100 as described above for example, between the single-layer rings 101 inside the laminated ring 100 when the transmission belt travels in a power transmission state. Inevitable slip occurs. Therefore, the slip is a loss, and the power transmission efficiency of the transmission belt is reduced accordingly.
- the ring is formed of an elastic body such as rubber or resin, so that the pulley can be smoothly wound. Therefore, the ring having flexibility or flexibility can be configured as a single-layer integrated structure. By making the ring into a single-layer integrated structure, unavoidable slipping inside the ring such as the above-described metal laminated ring does not occur, so that it is possible to avoid loss due to the slip.
- a ring made of an elastic body such as rubber or resin has moderate flexibility and flexibility, but has a relatively low rigidity compared to a metal ring.
- the distribution of the load acting on the saddle surface is likely to be uneven. Therefore, when such a relatively low rigidity rubber or resin ring is combined with an element having a saddle surface crowned as described in, for example, Japanese Patent No. 3406283, The frictional force acting between the saddle surface of the element and the innermost peripheral surface of the ring may become unstable, and effective centering or positioning may not be possible as in the case of using a metal ring. is there.
- An object of the present invention is to provide a pressure transmission belt that can be prevented.
- the present invention has a thickness of an elastic material and a large number of plate-like elements in which a concave portion opened on the outer peripheral side in the belt radial direction is formed in the central portion in the belt width direction. And a belt-shaped ring that is formed in a single layer in a direction and is fitted into the recess to bind the elements in an annularly aligned state.
- Left and right inclined surfaces that are plane-symmetric with respect to the center plane in the belt width direction are formed on the side end surfaces, and the left and right inner wall surfaces of the recess in the belt width direction are inclined with respect to the both inclined surfaces, respectively.
- Left and right contact planes that are equal and have a smaller flat area per plate thickness than the both inclined surfaces, or left and right contact curved surfaces that have both inclined surfaces as contact surfaces are formed.
- the present invention is formed in a single layer in the thickness direction by a large number of plate-like elements in which a recess opening on the outer peripheral side in the belt radial direction is formed at the central portion in the belt width direction and an elastic material.
- Left and right inclined surfaces that are plane-symmetric with respect to the center surface in the width direction are formed, and the left and right side end surfaces in the belt width direction of the ring have the same inclination as the both inclined surfaces and the both inclined surfaces, respectively.
- the pressing type is characterized in that left and right contact planes having a smaller flat area per plate thickness dimension of the element or left and right contact curved surfaces having both inclined surfaces as contact surfaces are formed. It is a moving belt.
- both the inclined surfaces are flat surfaces inclined in a direction in which the distance from the center surface becomes longer as the distance from the outer peripheral side to the inner peripheral side in the belt radial direction increases. It is a pressure transmission belt including.
- a clearance space is further formed on the inner wall surfaces for accommodating the expanded portion when the ring is elastically deformed to expand in the belt width direction. It is a pressure type transmission belt.
- the ring that constitutes the transmission belt together with the element is formed as an annular member having a single layer in the thickness direction and made of an elastic body having a rigidity lower than that of the element. Therefore, when traveling as a transmission belt, for example, compared to using a laminated ring formed by laminating a plurality of thin band-like rings, there is a loss due to slippage between thin rings laminated inside the ring. Since it does not occur, the power transmission efficiency of the pressure transmission belt can be improved accordingly.
- the left and right side end faces of the ring are formed as inclined surfaces so that the cross-sectional shape of the ring is symmetrical in the belt width direction.
- a contact plane or a contact curved surface that contacts the inclined surface of the ring is formed on the left and right inner wall surfaces of the recess of the element that accommodates the ring.
- both the left and right inner wall surfaces of the recess are formed as inclined surfaces so that the recess of the element is bilaterally symmetrical in the belt width direction.
- contact planes or contact curved surfaces that contact the inclined surfaces of the recesses are formed on the left and right end faces of the ring accommodated in the recesses.
- the ring is centered in the belt width direction in the concave portion by fitting the ring into the concave portion of the element. Furthermore, the contact area of the contact plane or the contact curved surface and the portion where the inclined surface contacts each other is smaller than the flat area of the inclined surface. For this reason, it is possible to prevent or suppress the occurrence of uneven contact or uneven load at the part where the left and right side end faces of the ring and the left and right inner wall surfaces of the concave portion of the element are in contact with each other. Loss due to friction and uneven wear of the ring at the contact portion with the inner wall surface of the recess can be prevented or suppressed.
- the left and right inclined surfaces are formed so that the interval between the left and right inclined surfaces is wider on the inner peripheral side than on the outer peripheral side in the belt radial direction. Therefore, in a state where the ring is fitted in the recess of the element, the width of the opening of the recess viewed from the ring side is narrower on the outer peripheral side than on the inner peripheral side in the belt circumferential direction. Therefore, when the ring is fitted into the recess of the element, the ring can be prevented from coming out of the recess, and the assembled state of the element and the ring can be reliably maintained. That is, the transmission belt can be reliably configured from the element and the ring.
- the ring when the ring is elastically deformed so as to expand in the belt width direction due to a load acting on the ring during load operation of the transmission belt, the expanded portions are formed on both inner wall surfaces of the recess of the element. It is accommodated in the formed escape space. Therefore, even if the ring is deformed by receiving a load, an increase in contact load between the side end face of the ring and the inner wall surface of the recess of the element can be avoided or suppressed. As a result, loss due to friction and uneven wear of the ring at the contact portion between the side end surface of the ring and the inner wall surface of the recess of the element can be prevented or suppressed.
- the transmission belt B of the pressing type is wound around, for example, a driving side (input shaft) pulley and a driven side (output shaft) pulley of a belt type continuously variable transmission,
- the example of the belt which transmits motive power between is shown.
- the element 1 in this invention is comprised from the plate-shaped member made from metal, for example.
- left and right side surfaces 3 and 4 in the belt width direction (x-axis direction in FIG. 1) are formed as tapered inclined surfaces. Both side surfaces 3 and 4 inclined in a tapered shape are in frictional contact with the belt winding groove (V-shaped groove) 5a of the pulley 5 to transmit torque.
- Left and right column portions 6 and 7 extending upward in the vertical direction (y-axis direction in FIG. 1) of the element 1 are formed at both left and right end portions in the belt width direction of the main body portion 2, respectively. Therefore, the upper end surface 2a which is the upper edge portion in FIG. 1 of the main body portion 2 and the left and right inner wall surfaces 6a and 7a facing the center in the belt width direction of the main body portion 2 of both pillar portions 6 and 7 are:
- An opening recess 8 is formed on the upper side of the element 1, that is, on the outer peripheral side as the transmission belt B.
- the opening concave portion 8 is a space portion for accommodating the band-like ring 9 for annularly binding the elements 1 arranged in an annular shape in close contact with each other by fitting in the concave portion. Therefore, the upper end surface 2a is a saddle surface 2a on which the inner peripheral surface 9i of the ring 9 is placed in contact.
- the ring 9 in the present invention is an annular belt-like body, and is formed as a single-layer annular member having a predetermined flexibility or flexibility by an elastic member made of, for example, rubber or resin. .
- a so-called laminated ring 100 is used which is configured to be stacked in a plurality of layers in the direction (or thickness direction).
- the stacked state of the single rings 101 is held by the tension of the single rings 101, the frictional force between the single rings 101, or the like. Therefore, a high-strength multi-layer ring 100 having a strength increased by stacking a plurality of single rings 101 while maintaining the flexibility or flexibility of the thin metal band-shaped single ring 101 is configured. be able to.
- the conventional laminated ring 100 has a configuration in which a plurality of single rings 101 are respectively laminated as described above, it can be relatively moved between the single rings 101, and power transmission At this time, slip occurs between the single rings 101. That is, when power is transmitted by being wound around a pulley as a transmission belt, a difference in frictional force or moment occurs between the inner layer side and the outer layer side of the laminated ring 100, and so on. Inevitably slips between the outer ring and the single ring 101 on the outer layer side. For this reason, such inevitable slippage is a loss, and power transmission efficiency of the transmission belt is inevitably reduced.
- the transmission belt B of the present invention employs a ring 9 formed of an elastic material such as rubber or resin.
- the ring 9 can be configured as a single-layered annular member with a single layer in the thickness direction instead of the laminated ring 100 as described above. Therefore, when traveling as a transmission belt B, there is no loss due to slipping inside the ring as in the above-described laminated ring 100, and accordingly, compared with a transmission belt using the conventional laminated ring 100. The power transmission efficiency of the transmission belt B can be improved.
- the ring 9 is made of a single layer by an elastic member having the strength required to achieve the strength required for the transmission belt B and the flexibility or flexibility required to smoothly wind the pulley 5.
- an elastic member having the strength required to achieve the strength required for the transmission belt B and the flexibility or flexibility required to smoothly wind the pulley 5.
- it may be configured of a material other than the rubber or resin as described above.
- it may be composed of a composite material obtained by synthesizing a fiber, a metal wire, or the like with a rubber or resin as a core material.
- each element 1 needs to spread in a fan shape with respect to the center of the pulley 5 and be in close contact with each other in order to transmit torque without breaks.
- each element 1 is formed such that the lower part of the main body 2 in FIG. 1 and FIG. 2 (the part on the center side in the annular arrangement) is thin.
- the ring 9 that binds many elements 1 is in contact with the saddle surface 2a of this kind of element 1. Therefore, in the state where the transmission belt B is transmitting torque, the contact pressure increases, whereas when the element 1 is wound around the pulley 5 from the linearly arranged state and opened in a fan shape. In addition, sliding occurs between the ring 9 and the saddle surface 2a, and accordingly, a large frictional force is generated. At this time, if the distance between the saddle surface 2a and the locking edge 10 in the vertical direction of the element 1 is increased, the moment due to the frictional force between the ring 9 and the saddle surface 2a increases, and the ring 9 and the saddle surface 2a More easily slide between the two. As a result, friction loss during operation of the transmission belt B may increase, and the transmission efficiency of the transmission belt B may be reduced.
- the ring 9 and the saddle surface are formed by forming the locking edge 10 at the same or substantially the same position as the saddle surface 2a in the vertical direction of the element 1.
- the moment by the frictional force between 2a can be made as small as possible.
- the friction loss during operation of the transmission belt B can be reduced and the transmission efficiency of the transmission belt B can be improved.
- 11 and a hole 12 are formed.
- a truncated cone-shaped boss 11 is formed on the front surface 2 f of the main body 2 so as to protrude outward.
- a bottomed cylindrical shape which is recessed inside and is loosely fitted to the boss 11 in the adjacent element 1 on the rear surface 2r (the right side surface in the z-axis direction in FIG. 2) opposite to the boss 11.
- Hole 12 is formed.
- the element 1 has the boss 11 and the hole 12 formed on the inner peripheral side (the lower side in FIGS. 1 and 2) with respect to the locking edge 10, and the boss 11 and the hole 12 are formed.
- the thickness of the portion is thin, and the portion on the outer peripheral side (the upper side in FIGS. 1 and 2) is thicker than the locking edge 10. Therefore, in a state where the elements 9 are linearly arranged with the ring 9 being pulled in a straight line, the elements 1 are in contact with each other at a thick part, and the bosses 11 and the holes 12 are mutually connected. And fit.
- the elements 1 are arranged in a fan shape according to the curved state of the ring 9 in a state where the ring 9 is curved, the elements 1 are in contact with each other at the respective locking edges 10. To do.
- the transmission belt B centers the position of the ring 9 in the width direction of the belt within the opening recess 8 of the element 1, and prevents the ring 9 from colliding with each other and uneven wear.
- Left and right inclined surfaces 13 and 14 are formed on one of the left and right side end surfaces 9a and 9b in the width direction or the left and right inner wall surfaces 6a and 7a in the belt width direction of the opening recess 8 of the element 1, respectively.
- left and right inclined surfaces 13 and 14 are formed on the left and right side end surfaces 9 a and 9 b of the ring 9, respectively.
- both side end surfaces 9a and 9b of the ring 9 are formed as left and right inclined surfaces 13 and 14 that are symmetrical with respect to the center plane C in the belt width direction, respectively.
- Each of the inclined surfaces 13 and 14 is a flat surface inclined in a direction in which the distance from the center plane C becomes longer as it goes from the outer peripheral side to the inner peripheral side in the belt radial direction. Therefore, as shown in FIG. 1, the ring 9 has a cross-sectional shape perpendicular to the belt circumferential direction, the outer peripheral surface of the ring 9 being the upper bottom, the inner peripheral surface 9 i of the ring 9 being the lower bottom, and the upper bottom. It is formed so as to have an isosceles trapezoid with a lower bottom.
- the transmission belt B is provided on either one of the left and right side end surfaces 9a and 9b in the belt width direction of the ring 9 or the left and right inner wall surfaces 6a and 7a in the belt width direction of the opening recess 8 of the element 1.
- Left and right contact planes 15 and 16 or contact curved surfaces 19 and 20 are formed. In the configuration example shown in FIG. 1, left and right contact planes 15 and 16 are formed on the left and right inner wall surfaces 6 a and 7 a of the opening recess 8, respectively.
- the contact curved surfaces 19 and 20 will be described later with reference to FIG.
- the left and right contact planes 15 and 16 have the same inclination as the both inclined surfaces 13 and 14 as described above, and have a smaller plane area per thickness dimension of the element 1 than the both inclined surfaces 13 and 14. It forms so that it may become, both the inner wall surfaces 6a and 7a of the opening recessed part 8, respectively. More specifically, as shown in an enlarged view in FIG. 3, the plane area B smaller than the plane area A with respect to the plane area A per thickness dimension of the element 1 on the inclined surfaces 13 and 14 of the ring 9. Left and right contact planes 15 and 16 are formed on both inner wall surfaces 6 a and 7 a of the opening recess 8, respectively.
- the thickness dimension of the element 1 is a dimension indicated by a thickness T in FIG. 2, and is the maximum plate thickness of the element 1 in the non-thinned portion on the outer peripheral side of the locking edge 10. .
- the inclined surfaces 13 and 14 and the contact planes 15 and 16 are in contact with each other in a state in which the ring 9 is fitted and accommodated in the opening recess 8 of the element 1. That is, as described above, the inclined surfaces 13 and 14 and the contact planes 15 and 16 are formed so that the inclinations of the opposing surfaces are equal to each other.
- both the inclined surfaces 13 and 14 and the contact flat surfaces 15 and 16 are brought into surface contact with each other in a state where the ring 9 is fitted in the opening recess 8. be able to.
- the dimension W and the opening width D of the opening recess 8 of the element 1, that is, the narrowest distance D between the inner wall surfaces 6a and 7a facing each other on the opening end side of the opening recess 8 are appropriately set.
- both the inclined surfaces 13 and 14 of the ring 9 become tapered surfaces, the position of the ring 9 in the belt width direction in the opening recess 8 is centered by the wedge action of the tapered surfaces. Therefore, it is possible to prevent or suppress the occurrence of partial contact or uneven load at the portions where the side end surfaces 9a, 9b of the ring 9 and the inner wall surfaces 6a, 7a of the recess 8 are in contact with each other.
- the contact area of the portion where both the inclined surfaces 13, 14 and the contact flat surfaces 15, 16 are in contact with each other is the both inclined surfaces. 13 and 14 is smaller than the plane area per thickness dimension of the element 1.
- the portions where the inclined surfaces 13 and 14 and the contact flat surfaces 15 and 16 are in contact with each other that is, the portions where the side end surfaces 9a and 9b of the ring 9 and the inner wall surfaces 6a and 7a of the recess 8 are in contact with each other.
- the contact area is reduced, and the frictional resistance at the contact portion between the ring 9 and the element 1 is reduced. Therefore, loss due to the friction and wear of the ring 9 can be prevented or suppressed.
- the ring 9 is made of an elastic material having flexibility or flexibility as described above. Therefore, for example, as shown in FIG. 4, the ring 9 is curved so that the central portion in the belt width direction of the ring 9 is convex toward the outer peripheral side, and the outer width W ′ of the curved ring 9 is set as an opening recess. 8 can be made narrower than the opening width D.
- the ring 9 when assembling the ring 9 and the element 1, the ring 9 is bent as described above so that the ring 9 passes through the opening width D of the opening recess 8 and is fitted into the opening recess 8. Can be included. Then, after the ring 9 is fitted into the opening recess 8, the ring 9 is returned to the original state, whereby both the inner wall surfaces 6 a and 7 a of the opening recess 8 and both inclined surfaces 13 of the ring 9 are formed. , 14 can be brought into contact with each other, and at the same time, the ring 9 can be locked to both inner wall surfaces 6a, 7a of the opening recess 8 to prevent the ring 9 from being detached from the opening recess 8. That is, the state in which the element 1 and the ring 9 are assembled can be reliably maintained.
- left and right relief spaces 17 and 18 are formed on the left and right inner wall surfaces 6a and 7a of the opening recess 8, respectively.
- the escape spaces 17 and 18 are spaces for accommodating the expanded portions when the ring 9 fitted in the opening recess 8 undergoes elastic deformation expanding in the belt width direction. Accordingly, the escape spaces 17 and 18 are formed by recessing part of both inner wall surfaces 6a and 7a of the opening recess 8 toward the side surfaces 3 and 4 in the belt width direction.
- both side end surfaces 9a and 9b of the ring 9 are expanded in the belt width direction.
- the shape / dimensions of the two escape spaces 17, 18 and the formation positions on the inner wall surfaces 6 a, 7 a are assumed to be, for example, the shape / dimension of the ring 9, the hardness of the material, and the shape / dimension of the opening recess 8. It can be set appropriately by design or experiment in consideration of the load to be generated and the generated stress.
- left and right inclined surfaces 13 and 14 are respectively formed on the left and right side end surfaces 9 a and 9 b of the ring 9, and both inclined surfaces 13 are respectively formed on the left and right inner wall surfaces 6 a and 7 a of the opening recess 8.
- the transmission belt B according to the present invention is formed on the left and right inner wall surfaces 6a and 7a of the opening recess 8.
- the left and right inclined surfaces 13 and 14 are respectively formed, and the left and right side end surfaces 9a and 9b of the ring 9 are respectively formed with left and right contact planes 15 and 16 that are in surface contact with the inclined surfaces 13 and 14, respectively. You can also.
- the transmission belt B according to the present invention is provided with left and right side end surfaces 9a and 9b of the ring 9 or left and right inner wall surfaces 6a and 7a of the opening recess 8 instead of the left and right contact planes 15 and 16 described above. It can also be set as the structure in which the contact curved surfaces 19 and 20 were formed.
- left and right inclined surfaces 13 and 14 are formed on the left and right inner wall surfaces 6 a and 7 a of the opening recess 8, respectively, and the left and right contact curved surfaces 19 and 9 are respectively formed on the left and right side end surfaces 9 a and 9 b of the ring 9.
- the configuration in which 20 is formed is shown.
- both inner wall surfaces 6a and 7a of the opening recess 8 in the configuration example shown in FIG. 6 are formed as left and right inclined surfaces 13 and 14 that are symmetrical with respect to the center plane in the belt width direction, respectively.
- Each of the inclined surfaces 13 and 14 is a flat surface inclined in a direction in which the distance from the center surface becomes longer as it goes from the outer peripheral side to the inner peripheral side in the belt radial direction.
- the left and right contact curved surfaces 19, 20 having a plane parallel to both the inclined surfaces 13, 14 of the opening recess 8 as the contact surfaces are formed on both side end surfaces 9a, 9b of the ring 9 in the configuration example shown in FIG. Is formed. That is, in the configuration example shown in FIG. 6, in a state where the ring 9 is fitted and accommodated in the opening recess 8, the both inclined surfaces 13 and 14 formed on both inner wall surfaces 6 a and 7 a of the opening recess 8 are in contact with each other. As a surface, the two contact curved surfaces 19 and 20 of the ring 9 are brought into contact with each other. Therefore, in other words, left and right contact curved surfaces 19, 20 having both inclined surfaces 13, 14 of the opening recess 8 as contact surfaces are formed on both side end surfaces 9a, 9b of the ring 9 in the configuration example shown in FIG. Has been.
- the two inclined surfaces 13 and 14 formed on the inner wall surfaces 6 a and 7 a and the contact curved surfaces 19 and 20 of the ring 9 are connected to the opening recess 8 of the element 1. In the state in which 9 is fitted and accommodated, they are in contact with each other. That is, as described above, both the inclined surfaces 13 and 14 and the both contact curved surfaces 19 and 20 are formed so that the both inclined surfaces 13 and 14 are the contact surfaces of the both contact curved surfaces 19 and 20, respectively.
- both the inclined surfaces 13, 14 and the both contact curved surfaces 19, 20 can be brought into line contact with each other, or can be brought into surface contact within a substantially narrow range.
- both inclined surfaces 13 and 14 formed in the opening recess 8 become so-called tapered guide surfaces.
- the position of the ring 9 in the belt width direction is centered. Therefore, it is possible to prevent or suppress the occurrence of partial contact or uneven load at the portions where the side end surfaces 9a, 9b of the ring 9 and the inner wall surfaces 6a, 7a of the recess 8 are in contact with each other.
- the ring 9 that constitutes the transmission belt B together with the element 1 is made of an elastic material such as rubber or resin having a lower rigidity than the metal element 1, for example. It is formed as an annular member having a single layer and a single structure in the thickness direction. Therefore, when traveling as the transmission belt B, there is no loss due to slip or the like inside the ring 9, so that the power transmission efficiency of the transmission belt B can be improved accordingly.
- both end surfaces 9a and 9b of the ring 9 are formed as the inclined surfaces 13 and 14 so that the cross-sectional shape of the ring 9 is bilaterally symmetrical in the belt width direction.
- contact flat surfaces 15 and 16 or contact curved surfaces 19 and 20 respectively contacting the inclined surfaces 13 and 14 of the ring 9 are formed on both inner wall surfaces 6a and 7a of the opening recess 8 of the element 1 that accommodates the ring 9. It is formed.
- both the inner wall surfaces 6a and 7a of the opening recessed part 8 are formed as the inclined surfaces 13 and 14 so that the opening recessed part 8 of the element 1 may become left-right symmetric in the belt width direction.
- contact planes 15 and 16 or contact curved surfaces 19 and 20 that contact the inclined surfaces 13 and 14 of the opening recess 8 are formed on both side end surfaces 9 a and 9 b of the ring 9 accommodated in the opening recess 8.
- the left and right inclined surfaces 13 and 14 formed on the ring 9 or the element 1 become tapered surfaces or tapered guide surfaces. Therefore, when the ring 9 is fitted into the opening recess 8, the ring 9 is centered in the belt width direction in the opening recess 8 due to the so-called wedge action of the tapered portions of both inclined surfaces 13 and 14.
- the contact plane 15 having a smaller plane area per plate thickness than the both inclined surfaces 13, 14 is provided in the portion facing both the inclined surfaces 13, 14. 16 or contact curved surfaces 19, 20 are formed. Accordingly, the contact areas of the portions where the contact surfaces 15, 16 or the contact curved surfaces 19, 20 and the inclined surfaces 13, 14 are in contact with each other are the same as the thickness of the elements of the inclined surfaces 13, 14. It becomes smaller than the flat area. Therefore, it is possible to prevent or suppress the occurrence of partial contact or uneven load at the portions where the both side end surfaces 9a, 9b of the ring 9 and the inner wall surfaces 6a, 7a of the opening recess 8 are in contact with each other. It is possible to prevent or suppress loss due to friction at the contact portion between the element 9 and the element 1 and uneven wear of the ring 9.
- the present invention is not limited to the specific examples described above.
- the configuration in which the pressing transmission belt according to the present invention is applied to a belt type continuously variable transmission is described as an example.
- the pressing transmission belt according to the present invention is a belt type.
- the present invention is not limited to a continuously variable transmission, and can be applied as a push-type transmission belt for power transmission in another winding transmission device (belt transmission device) constituted by a belt and a pulley.
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Abstract
Description
Claims (4)
- ベルト幅方向での中央部分にベルト径方向での外周側に開口する凹部が形成された多数の板片状のエレメントと、弾性材料により厚さ方向で単層に形成されるとともに前記エレメントを環状に整列させた状態で結束するために前記凹部に嵌め込まれる帯状のリングとを備えた押圧式伝動ベルトにおいて、
前記リングの前記ベルト幅方向における左右の側端面に、前記ベルト幅方向での中心面に対して面対称となる左右の傾斜面が形成され、
前記凹部の前記ベルト幅方向における左右の内壁面に、それぞれ、前記両傾斜面と傾きが等しくかつ前記両傾斜面よりも前記エレメントの板厚寸法当たりの平面積が小さい左右の接触平面もしくは前記両傾斜面を接面とする左右の接触曲面が形成されている
ことを特徴とする押圧式伝動ベルト。 - ベルト幅方向での中央部分にベルト径方向での外周側に開口する凹部が形成された多数の板片状のエレメントと、弾性材料により厚さ方向で単層に形成されるとともに前記エレメントを環状に整列させた状態で結束するために前記凹部に嵌め込まれる帯状のリングとを備えた押圧式伝動ベルトにおいて、
前記凹部の前記ベルト幅方向における左右の内壁面に、前記ベルト幅方向での中心面に対して面対称となる左右の傾斜面が形成され、
前記リングの前記ベルト幅方向における左右の側端面に、それぞれ、前記両傾斜面と傾きが等しくかつ前記両傾斜面よりも前記エレメントの板厚寸法当たりの平面積が小さい左右の接触平面もしくは前記両傾斜面を接面とする左右の接触曲面が形成されている
ことを特徴とする押圧式伝動ベルト。 - 前記両傾斜面は、いずれも前記中心面からの距離が前記ベルト径方向での外周側から内周側へ向かうにしたがい長くなる向きに傾いた平面を含む請求項1または2に記載の押圧式伝動ベルト。
- 前記両内壁面に、前記リングが前記ベルト幅方向に拡張する弾性変形をする際にその拡張部分を収容するための逃げスペースが更に形成されている請求項1ないし3のいずれかに記載の押圧式伝動ベルト。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US13/002,255 US8690719B2 (en) | 2009-11-20 | 2009-11-20 | Push type driving belt |
JP2011501443A JP5158252B2 (ja) | 2009-11-20 | 2009-11-20 | 押圧式伝動ベルト |
PCT/JP2009/069696 WO2011061850A1 (ja) | 2009-11-20 | 2009-11-20 | 押圧式伝動ベルト |
CN200980125459.1A CN102144110B (zh) | 2009-11-20 | 2009-11-20 | 挤压式传动带 |
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PCT/JP2009/069696 WO2011061850A1 (ja) | 2009-11-20 | 2009-11-20 | 押圧式伝動ベルト |
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WO2011061850A1 true WO2011061850A1 (ja) | 2011-05-26 |
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PCT/JP2009/069696 WO2011061850A1 (ja) | 2009-11-20 | 2009-11-20 | 押圧式伝動ベルト |
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US (1) | US8690719B2 (ja) |
JP (1) | JP5158252B2 (ja) |
CN (1) | CN102144110B (ja) |
WO (1) | WO2011061850A1 (ja) |
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US11280385B2 (en) * | 2016-02-12 | 2022-03-22 | Aisin Corporation | Transfer belt |
US20190154112A1 (en) * | 2016-02-12 | 2019-05-23 | Aisin Aw Co., Ltd. | Power transfer belt |
NL1042203B1 (en) * | 2016-12-30 | 2018-07-23 | Bosch Gmbh Robert | A transverse segment for a drive belt for a continuously variable transmission |
JP6809368B2 (ja) * | 2017-05-16 | 2021-01-06 | アイシン・エィ・ダブリュ株式会社 | 無段変速機および伝動ベルト |
JP6747377B2 (ja) | 2017-05-16 | 2020-08-26 | アイシン・エィ・ダブリュ株式会社 | 無段変速機および伝動ベルト |
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US11454299B2 (en) * | 2017-06-02 | 2022-09-27 | Aisin Corporation | Transmission belt element and transmission belt |
CN107218349A (zh) * | 2017-07-12 | 2017-09-29 | 湖南大学 | 一种新型无级变速器金属带及金属片 |
JP2019065930A (ja) * | 2017-09-29 | 2019-04-25 | トヨタ自動車株式会社 | 伝動ベルト |
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NL1043521B1 (en) * | 2019-12-24 | 2021-09-02 | Bosch Gmbh Robert | A drive belt provided with a plurality of transverse segments and a ring stack that is confined in a central opening of these transverse segments |
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Also Published As
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US8690719B2 (en) | 2014-04-08 |
US20110237376A1 (en) | 2011-09-29 |
CN102144110B (zh) | 2014-04-09 |
CN102144110A (zh) | 2011-08-03 |
JP5158252B2 (ja) | 2013-03-06 |
JPWO2011061850A1 (ja) | 2013-04-04 |
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