JP3391489B2 - Steel belt and continuously variable transmission - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a block composed of a main belt and a V-pulley, which are mounted on the outer peripheral portion of a plurality of blocks which are formed in a slanted portion on both side walls and are arranged in a row in the thickness direction to contribute to power transmission. A steel belt having an auxiliary belt for extracting and a continuously variable transmission.

[0002]

2. Description of the Related Art As shown in FIG. 12, a first conventional steel belt and continuously variable transmission (Japanese Patent Laid-Open No. 1-24848) has a substantially trapezoidal thin plate (FIG. 12 (B)) arranged as a torque transmission block B. The steel belt SB installed and mounted on the steel hoop SF is wound between the input shaft and output shaft pulleys IP and OP having the same diameter as shown in the figure, and pushed in the thickness direction of the torque transmission block B. Torque is transmitted by force, and the pulley hoop IP ・ O by the tension of the steel hoop.
Block B was removed from P.

A second conventional steel belt and continuously variable transmission (Japanese Patent Laid-Open No. 1-145447) are shown in FIGS.
As shown in FIG. 4, a steel belt SB composed of a substantially trapezoidal thin plate block B and plate chains L1 and L2 of different types that are superposed and connected by two pin rods R1 and R2 is shown in FIG. Chain C of steel belt SB wound between pulleys of the same diameter as shown
The torque is transmitted by the pulling force and the block B is separated from the pulley.

[0004]

Since the first conventional steel belt and continuously variable transmission described above transmit torque by the transmission block, when the steel hoop is stretched to transmit a large torque, the movement of the transmission block B will occur. However, there is a problem that the transmission torque cannot be increased when the movement of the transmission block is improved. Further, the tension of the steel hoop SF separates the transmission block from the pulleys IP and OP. Therefore, if the pulley pressure is increased to increase the transmission torque, the steel hoop SF stretches and wears, and in extreme cases, breaks. Therefore, there is a problem that the transmission torque and the pressure of the pulley must be strictly controlled.

In the second conventional steel belt and the continuously variable transmission, the thin plate block B is pulled out from the pulley by the chain C, so that the chain C is formed when the pulley pressure rises in order to increase the transmission torque. Two
Since a large load acts on the pin rods R1 and R2 of the book, it is necessary to suppress this load to the extent that the pin rods R1 and R2 are not destroyed. Strict pulley pressure control is required and the steel belt SB winds around the pulley. Since there is a space for the pin rods R1 and R2 between the adjacent thin plate blocks B, the belt SB does not rotate smoothly and it becomes difficult to control the tension of the steel belt SB. There was a problem that the noise at the time became loud.

Therefore, the present inventors have proposed a main belt for torque transmission and a V for a plurality of blocks arranged in the thickness direction.
Focusing on the technical idea of the present invention of the steel belt that independently winds the auxiliary belt for pulling out the block from the pulley, the diameter of the output side pulley is made larger than the input side pulley diameter. The present invention that achieves the object of enabling transmission of a large torque and transmitting the torque smoothly and efficiently as a result of repeated research and development after paying attention to the technical idea of the present invention of a continuously variable transmission. Has arrived.

[0007]

A continuously variable transmission according to the present invention (the first invention according to claim 1 ) has a V pulley arranged on an input shaft and a large diameter arranged on an output shaft. A V-pulley and a plate member having a flat portion on the upper part and a slanted part which is in contact with the slanted surface of the V-pulley at the lower part of both side walls, and a plurality of blocks arranged in the thickness direction to hold the belt. , A main belt mounted on the upper flat portion of a plurality of blocks and contributing to torque transmission, and an auxiliary for pulling out the blocks from the inclined surface of the V pulley which is mounted below the main belt of the plurality of blocks and abuts on the block. Consisting of a belt and a steel belt,
The auxiliary belt is inserted between a plurality of links inserted into narrow openings formed on the left and right of the plurality of first plate members as the blocks and the adjacent first plate members. Arranged in wide openings formed on the left and right of the plurality of second plate members as blocks, and locked by the narrow openings of the first plate members adjacent to each other via the second plate member. A chain of two rows consisting of a plurality of pins having a diameter smaller than the thickness of a second plate member connecting adjacent adjacent links and designed to break first if the steel belt breaks Is.

In the steel belt of the present invention (the second invention according to claim 2 ), the inclined portions are formed at the lower portions of both side walls to expand upward, and the unevenness portion for positioning provided in the center is sandwiched therebetween. A first plate member having a narrow first width opening formed on the left and right and a second plate member having a wide second width opening formed in a row in the thickness direction. A plurality of blocks and a pin that connects the plurality of links to the adjacent link, and is interposed between two adjacent first plate members each having an opening having a narrow first width. The second opening is formed in the second plate member to be inserted and has a second opening having a second width.
The pin having a diameter smaller than the thickness of the plate member is locked by the narrow opening of the adjacent first plate member through the second plate member, and the left and right of the plurality of blocks are Adjacent to each other, which has two rows of chains mounted in the opening of each of the two adjacent rectangular openings formed on the left and right sides.
The plurality of first plate members each having a narrow rectangular opening formed on the left and right sides are interposed between the plate members.

[0009]

In the continuously variable transmission according to the first aspect of the present invention having the above structure, the main belt mounted on the upper flat portion above the inclined portion that contacts the pulley of the block is held in the pulley, Torque is transmitted from the pulley on the input shaft to the large-diameter pulley on the output shaft by the tensile force due to the friction of, and by the auxiliary belt mounted below the main belt,
The blocks are arranged in a row, the blocks are pulled out from the pulley, and the auxiliary belts that are adjacent to each other are inserted into the narrow openings formed on the left and right of the plurality of first plate members as the blocks. Links are arranged in wide openings formed on the left and right sides of the plurality of second plate members as the blocks inserted between the adjacent first plate members and the second plate member is interposed therebetween. Since they are connected by a plurality of pins having a diameter smaller than the thickness of the second plate member locked by the narrow openings of the adjacent first plate members,
Allows locking of the link and rocking of the chain when the block comes into contact with the pulley, and the pins are damaged first if the steel belt is damaged, so repairs can be done by replacing only the pins Is.

The steel belt according to the second aspect of the invention having the above-mentioned structure has two adjacent openings each having an opening having a narrow first width.
Smaller than the thickness of the second plate member that connects adjacent links in the wide second width opening formed in the second plate member that is interposed between the first plate members. The pins having the diameter are arranged and locked by the narrow openings of the first plate members adjacent to each other through the second plate member among the plurality of first plate members, so that Since two rows of chains are mounted in the left and right openings,
The block allows rocking and swing of the chain when the block comes into contact with the pulley, and applies a tensile force to the chain.

[0011]

According to the continuously variable transmission of the first invention having the above-described operation, the roles of the main belt and the auxiliary belt mounted at different positions are shared, and the output pulley has a large diameter with respect to the input pulley. Therefore, it is possible to transmit a large torque, and it is possible to smoothly and efficiently transmit the torque, and a narrow width formed on the left and right sides of the plurality of first plate members as the blocks. Adjacent links constituting the auxiliary belt inserted into the openings have widths formed on the left and right sides of the plurality of second plate members as the blocks inserted between the adjacent first plate members. Connected by a plurality of pins having a diameter smaller than the thickness of the second plate member arranged in the wide opening and locked by the narrow opening of the adjacent first plate member through the second plate member. Ru In addition, it facilitates locking of the link and rocking of the chain when the block comes into contact with the pulley, and when the steel belt is damaged, the pin will be damaged first, so repair by replacing only the pin that is easy to manufacture. Has the effect of enabling.

In the steel belt of the second invention having the above-mentioned action, the pin having a diameter smaller than the thickness of the second plate member for connecting the adjacent links is formed with the opening having the narrow first width. Of a plurality of first plate members arranged in an opening of a wide second width formed in the second plate member interposed between two adjacent first plate members, Two rows of chains are mounted in the left and right openings of a plurality of blocks by being locked by the narrow openings of the adjacent first plate members via the two plate members. Therefore, when the block contacts the pulley, rocking and swinging of the chain are facilitated, and a tensile force is applied to the chain.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

[0014] (First Embodiment) steel belt and continuously variable transmission of the first embodiment (hereinafter simply referred to as continuously variable transmission) is a first shot Akira embodiment, shown in FIGS. 1 to 10 So that the main hoop 2 to be described later
Having a flat portion 16A forming a crown surface around which
An inclined portion 12A is formed in the lower part of both side walls and expands upward, and a rectangular opening 11 is formed on the left and right sides with the positioning uneven portions 13A and 14A arranged at the center in the left-right direction.
Plate members 10A, 10B, 10C on which A and 11B are formed
And a plurality of blocks 1 arranged in a row in the thickness direction.
(1A, 1B, 1C) and a stack of endless ribbons, which are mounted on the upper crown surface 16A of the block and contribute to torque transmission, and a plurality of links 31.
And the pins 32 are connected to each other, and the blocks are mounted in the rectangular openings 11A and 11B on the left and right below the main hoop 2 mounted on the upper crown surface 16A of the block, and the blocks are arranged in a row. The V pulley 5 which will be described later and is in contact
Steel belt 4 consisting of two rows of chains 3 as auxiliary belts for pulling out block 1 from 6 and 6
And an input V with variable spacing between the pulley surfaces arranged on the input shaft I.
It comprises a pulley 5 and an output V-pulley 6 having a larger diameter than the input V-pulley 5 of which the distance between the pulley surfaces arranged on the output shaft O is variable.

As shown in FIG. 7 and FIG. 9, the block 1 has two first blocks 1A shown in FIG. 3 arranged in an overlapping manner, and FIG. 4 for supporting the pin 32 of the chain 3 therebetween. The second block 1B shown is disposed, and finally, the separable third block 1C shown in FIG. 5 is disposed in place of the second block 1B, assembled into a belt, and then fixed with a dish screw. Further, when transmitting torque, the first block 1A is designed so that no gap is formed between the blocks arranged in a row.
The thickness and the number of sheets are determined according to the length of the link 31.
Furthermore, if the thickness of the blocks 1B and 1C changes depending on the diameter of the pin 32, the thickness and the number of blocks 1A also change.

As shown in FIG. 3, the first block 1A is formed with an opening 11A on the left and right, through which the link 31 of the chain 3 having a nearly square shape is inserted, and is a rectangular spectacle plate member 10A having a plate thickness of 3 mm. At a position corresponding to an intermediate portion between the inclined portion 12A formed in the lower part of the side wall and in contact with the pulley and the center in the left-right direction, the locking edge RE of the block 1A and the flat portion 16A forming the upper crown surface. Concave portion 13A and convex portion 14A formed in the thickness direction
And a slanted portion 15A for enabling locking of the block 1A formed below the surface on which the convex portion 14A is formed.

As shown in FIG. 4, the second block 1B has a spectacle-shaped plate member 1 similar to the first block 1A.
It is different in that rectangular openings 11B which are longer than the square openings 11A of the first block 1A are formed on the left and right sides for locking the pins of the chain 3 which will be described later.

As shown in FIG. 5, the third block 1C is formed of a spectacle-shaped member 10B having the same shape as the spectacle-shaped plate member 10B of the second block 1B.
The bottom part is composed of a removable member 10C, and the last pin 3
After the 2 has been fitted, the countersunk screw of M2 is removed, assembled into the belt, and screwed again at both ends to form an annular belt.

As shown in FIGS. 6 and 7, the chain 3 is formed as an endless link by connecting a large number of substantially Y-shaped links 31 and solid rod-shaped pins 32. .

As shown in FIG. 7, the link 31 has a circular hole 31 into which a pin 32 is inserted in the lateral direction of one base 31D.
Portion 31E where A is formed and is bifurcated in a U shape
Also circular holes 31B and 31C into which the pin 32 is inserted in the lateral direction
Is formed, and the base portion 31D of the adjacent link is interposed between the bifurcated branch portions 31E, and the pin 32 is inserted into the circular holes 31A of the base portion 31D and the circular holes 31B and 31C of the branch portions 31E to be connected to each other. It Further, the circular holes 31B and 31C are substantially equal to the diameter of the pin 32 to fix the pin 32, the circular hole 31A is larger than the diameter of the pin 32, and the adjacent rings are connected so as to be bent.

The connecting portion into which the pin 32 is inserted is the first
Of the blocks 1A are inserted into the rectangular openings 11B of the second blocks 1B, and the pins 32 are locked by the adjacent first blocks 1A having the square openings 11A. Has been done. That is, the diameter of the pin 32 is smaller than the thickness 3 mm of the second block 1B,
A sufficient clearance is secured to facilitate rocking and swing of the chain 3 when the block 1 abuts on the pulleys 5 and 6.

Two openings 11A, 11 in the block 1
After the chain 3 is inserted in B, each block 1A, 1
As shown in FIG. 8, a crown surface having a radius of 1000 to 2000 mm is formed on the upper flat portion 16A so that the main hoops 2 of B and 1C are not displaced from the center of the block 1, and the main hoop 2 is formed on the upper crown surface 16A. Be mounted. Block 1
The upper crown surface 16A is used as it is in the shearing process of the block except that the corners in the thickness direction of the block are chamfered.

The main hoop 2 is composed of a thin strip of maraging steel having a thickness of 0.25 mm, and has a depth of □ 0.
1 to □ 0.5 mm dents are arranged in an interval of 0.05 to 0.1 mm or formed innumerably, and when adjusting the length for stacking, bend with a 10 mm diameter roll and supply ammonia gas. Then, a nitriding treatment or a new tufftride treatment is performed, and a composite processing treatment is used to form a flat belt with an innermost peripheral length of 988 mm in which eight hoop materials having a surface residual stress of -100 kg / f or more are stacked. As shown in FIG. 8, it is mounted on the upper crown surface 16A of the block 1.

The input V pulley 5 and the output V pulley 6 are
In both cases, the material of SNCM420H is used for quenching and tempering, and the surface hardness of the pulley surface is Rockwell C4.
It was set to 5 to 48.

In both pulleys 5 and 6, one pulley plate 5F, 6F is fixed in order to make the gear ratio variable, and the other pulley plate 5M, 6M is an axis as shown by the two-dot chain line in FIG. It is configured to be movable in the direction, and the contact position in the radial direction of the block can be changed by changing the distance between the pulley surfaces.

The gear ratio e is the ratio of the number of revolutions No of the output pulley 6 to the number of revolutions Ni of the input pulley 5.
s is when the rotation speed of the output pulley 6 is lower than the rotation speed of the input pulley 5, and the speed increasing side gear ratio ef is the output pulley 6
Shows the case where the number of rotations is higher than the number of rotations of the input pulley 5.

In the first embodiment, the distance DS between the input and output shafts I and O shown in FIG. 2 is 225 mm, the outermost diameter Di1 of the input pulley 5 is 208 mm, and the output pulley 6 is
Has an outermost diameter Do1 of 236 mm, a minimum diameter Di2 of one tapered surface of the input pulley 5 of 72 mm, a minimum diameter Do2 of one tapered surface of the output pulley 6 of 122 mm, and a maximum gear ratio on the speed increasing side. The value is 1.5, the minimum value of the gear ratio on the deceleration side is 0.374, and the gear ratio width Δe is set to 4.

The pulley pressure is controlled according to the load of the output shaft O on the large diameter side, that is, when the gear ratio e is 1 or more, the input shaft I,
When the gear ratio e is less than 1, after determining the pulley pressure of the output shaft O, the pulley pressure on the small diameter side is controlled so as to have the target gear ratio.

The blocks 1A to 1C and the link 31 of the chain 3 are all made of the material SUJ2,
Hardened and tempered, the surface hardness is Rockwell C60
Set to 63. The inclined block 12A at the bottom of the side wall of each block is grid-blasted with ceramic powder before the above quenching / tempering treatment to a maximum depth of approximately 15μ.
An uneven surface of m is formed.

When the pin 32 of the chain 3 is made of material SUJ2 and the surface hardness is set to Rockwell C50 to 55 which is slightly lower than those of the blocks 1A to 1C and the link 31, the device of the first embodiment is damaged. Is designed so that this easy-to-manufacture pin 32 breaks first.

In the continuously variable transmission of the first embodiment having the above structure, the torque from the input V pulley 5 is held in the main hoop 2, the input V pulley 5 and the output V pulley 6 and moves outward in the radial direction. The pulling force of the main hoop due to the friction with the rotating block 1 is transmitted to the output V pulley 6.

In the continuously variable transmission of the first embodiment, the chain 3 consisting of the link 31 and the pin 32 inserted in the rectangular openings 11A and 11B formed on the left and right of the irregularities 13A and 14A of each block is pulled. The block 1 between the pulleys 5 and 6 is pulled out by force.

In the continuously variable transmission of the first embodiment having the above operation, the main hoop 2 is mounted on the upper crown surface 16A of the block 1 outside the inclined portion 12 where the block 1 and the pulleys 5 and 6 contact each other. Since it can be driven with a force smaller than the driving force between the block 1 and the pulleys 5 and 6, and the load can be reduced, as shown in FIG. The effect of enabling the above is achieved. As shown in FIG. 10, the first embodiment has an effect that it is possible to utilize the range of gear ratio 0.375 to 1.5 which is more efficient than the conventional one.

In the continuously variable transmission of the first embodiment, the torque transmitted by the friction between the main hoop 2 and the block 1 and the tensile force of the main belt is pressed by the block between the input V pulley and the output V pulley. Since the gap between the blocks disappears and the chain 3 does not act, the chain 3 can be designed for the force necessary for pulling out the block 1 from the pulleys 5 and 6, so that the chain can be downsized. The effect that the load does not have to be kept constant and the load is small is obtained. Further, in the present belt, like the conventional belt, torque is transmitted up to about 3 kgf · m by pressing between blocks, and when transmitting a large torque, the pulley moves radially outward on the pulley as described above. It was confirmed that the block 1 acts to stretch the main belt.

Further, in the continuously variable transmission of the first embodiment, the diameter of the output pulley 6 can be made larger than the diameter of the input pulley 5 so that the minimum pulley diameter of the output pulley 6 at the time of maximum acceleration can be made larger than that of the conventional one. Since the area of the pulley hydraulic chamber (not shown) becomes large, the selection range of the pulley pressure is large according to the load of the output shaft O, the force transmission range by the main belt can be widened, and the optimum pulley pressure can be controlled. It will be possible. In addition, the ball spline of the movable pulley 6M on the output shaft O side can be selected with a free size, and the movement of the movable pulley 6M of the output shaft O can be smoothed, so that it can be used within a range of good transmission efficiency. It is possible.

The continuously variable transmission according to the first embodiment is located at the center of the block 1 in the lateral direction, which is in the middle of the surfaces of the blocks 1 in contact with the locking edges RE and the main hoops 2 and is on the locking edge RE side. Since the projections and depressions 13A and 14A are formed in the thickness direction of the block 1, the projections and depressions 13A and 14A for alignment do not separate even if the block 1 locks around the locking edge RE as shown in FIG. 9 and tilts. The block 1 is held at a radial position in the pulleys 5 and 6, and one concavo-convex portion 13A and 14A is formed in the center, so that when the block 1 enters the pulleys 5 and 6, it is easy to enter along the inclined surface of the pulley. It has the effect of having a certain degree.

Further, the apparatus of the first embodiment has the above-mentioned unevenness 13
By disposing A and 14A near the locking edge RE, the height of the protrusion and the depth of the hole can be made shallow, and the clearance between the concave portion and the convex portion can be made substantially large. This has the effect of facilitating production.

Further, in the first embodiment, since the output pulley 6 can be made large in diameter and the minimum pulley diameter can be made larger than that of the input pulley 5, the pressure adjustment range can be made equal to or higher than the minimum pressure of the pump. Therefore, it is possible to optimize the force transmission range between the pulley 6 on the large diameter side and the block 1 and control the pressure of the pulley 5 on the small diameter side.
As a result, the force transmission range of the small-diameter pulley is optimized, and the transmission efficiency is maximized. In the past, the pulley on the constant pressure side and the pulley on the pressure adjustment side changed according to the gear ratio, so a special valve was required, and the control software became complicated, but it was possible to solve these problems. it can.

(Second Embodiment) A continuously variable transmission according to the second embodiment is the same continuously variable transmission as that of the first embodiment, and has an input shaft distance Ds of 215 mm and an outermost diameter Di1 of the input pulley 5. Is 201 mm, the minimum diameter Di2 is 62 mm, the outermost diameter Do1 of the output pulley 6 is 221 mm, the minimum diameter Do2 is 89 mm, and the maximum gear ratio on the speed increasing side is 1.8 mm.
The minimum value of the gear ratio on the deceleration side is 0.36, and the gear ratio width Δe is changed to 5.
The size and number of 1 to 1C are also changed.

The continuously variable transmission of the second embodiment having the above-described structure has the same effects as those of the first embodiment, achieves the maximum transmission torque of 20 kgf · m and the transmission efficiency of 90% or more. From the observation, there was no evidence of slipping on the contact surface between the block and the pulley.

(Third Embodiment) In the continuously variable transmission according to the third embodiment, an auxiliary belt composed of two chains in the first embodiment has a width of 10 mm and a thickness of 0.18 to 0.18 as shown in FIG. Two auxiliary hoops 33 having an innermost peripheral length of 891 mm in which eight thin strips of 10.2 mm maraging steel are stacked are changed, and accordingly, the shape of the block 1 is partially changed as shown in the figure.

The continuously variable transmission according to the third embodiment having the above-described structure has the same effects as those of the first embodiment, and the width of the steel belt can be reduced by forming the auxiliary hoop with a thin strip. The weight can be reduced,
There is an operational effect of enabling a transmission efficiency of 92% or more.

The embodiments described above are merely examples for the purpose of explanation, and the present invention is not limited to them. Those skilled in the art will recognize from the claims, the detailed description of the invention and the description of the drawings. Modifications and additions can be made without departing from the technical idea of the present invention.

In the above-mentioned embodiment, an example in which eight thin ribbons are stacked is described as an example of the main hoop and the auxiliary hoop.
At least one sheet may be used, and the number of sheets may be set as required, and as with the auxiliary belts of the first and third embodiments,
In addition to using the same number of books, one such as the main hoop may be used, and the number of books can be increased as necessary.

In the dry type continuously variable transmission, a rubber belt can be used instead of the steel hoop, but a width more than twice that of the metal belt is required, and it is necessary to take cooling air supply and other cooling measures. There is.

Other aspects of the invention are listed below.

The steel belt according to the first embodiment of the present invention is a plate member having a flat portion at the upper portion and inclined portions at the lower portions of both side walls, and is a plurality of plate members arranged in the thickness direction to hold the belt. A block, a main belt mounted on the upper flat portion of the plurality of blocks and contributing to torque transmission, and a V pulley mounted on the blocks below the main belts and arranged in contact with the blocks. The auxiliary belt to be pulled out more , the auxiliary belt is inserted between the plurality of links inserted into the openings formed in the plurality of first plate members as the block, and the adjacent first plate members. Also, adjacent links that are arranged in the openings formed in the plurality of second plate members as the blocks and that are locked by the openings of the adjacent first plate members through the second plate member are connected. Of the second plate member It is made of a chain of a plurality of pins of smaller diameter of.

In the steel belt of the first embodiment having the above structure, the main belt mounted on the flat portion above the inclined portion which contacts the pulley of the block is rubbed with the plurality of blocks held in the pulley. The torque is transmitted by the pulling force of the block and the blocks are pulled out from the pulley by the auxiliary belt mounted below the main belt, and the blocks are pulled out from the pulleys. Adjacent links constituting the auxiliary belt inserted into the opening formed in the second plate member are formed in the plurality of second plate members as the blocks inserted between the adjacent first plate members. Connected by a plurality of pins having a diameter smaller than the thickness of the second plate member arranged in the opening and locked by the opening of the first plate member adjacent to each other via the second plate member Since the one in which the block to allow the locking and rocking of the chain links when in contact with the pulley.

Since the steel belt of the first embodiment having the above-described function shares the roles of the main belt and the auxiliary belt mounted at different positions, it is possible to transmit a large torque and prevent the elongation. Adjacent links constituting the auxiliary belt inserted into the openings formed in the plurality of first plate members serving as the blocks are inserted between the first plate members adjacent to each other. A second plate member disposed in an opening formed in the plurality of second plate members as the block and locked by the openings of the first plate members adjacent to each other via the second plate member. Since they are connected by a plurality of pins each having a diameter smaller than the thickness of the block, locking of the link and rocking of the chain are facilitated when the block comes into contact with the pulley.

The steel belt according to the second embodiment of the present invention has a flat portion on the upper portion thereof, and an inclined portion is formed on the lower portions of both side walls so as to expand upward, and a concavo-convex portion for positioning is attached at the center. It is a plate member that has openings formed on the left and right to sandwich it, and is composed of multiple blocks that are arranged in the thickness direction to hold the belt and multiple endless ribbons that are stacked. A main hoop that is mounted on a portion that contributes to torque transmission, and that is composed of a plurality of links and pins, is mounted in the left and right openings below the main belt of the plurality of blocks, and the blocks are arranged in rows and contact with and Ri consists two rows of chain withdrawn from V pulley, the two rows of the chain, adjacent a bifurcated portion which is inserted into an opening formed in the plurality of first plate member as said block Forked link A plurality of links each including a base portion interposed between the first and second plate members, and an opening formed in the plurality of second plate members serving as the blocks inserted between the adjacent first plate members. A plurality of diameters smaller than the thickness of the second plate member that connects the bifurcated branch part and the base part of the adjacent links locked by the openings of the first plate members adjacent to each other via the second plate member. It consists of pins.

According to the steel belt of the second embodiment having the above-mentioned structure, the main hoops of laminated ribbons mounted on the upper flat part above the inclined part which is in contact with the pulley of the block are held in the pulley. The torque is transmitted by the pulling force due to the friction with the block, and the chain is installed below the main hoop to arrange the blocks in line and pull out the blocks from the pulleys. Adjacent links forming the chain in two rows, each of which includes a bifurcated branch portion inserted into an opening formed in one plate member and a base portion interposed between the bifurcated branch portions of the adjacent links, are adjacent to each other. The first plate members arranged in openings formed in the plurality of second plate members as the blocks inserted between the first plate members and adjacent to each other via the second plate member. Since the blocks are connected by a plurality of pins having a diameter smaller than the thickness of the second plate member that connects the bifurcated branch portion locked by the opening and the base portion, the locking of the link and the chain It enables rocking.

The steel belt of the second embodiment having the above-described function shares the roles of the main hoop mounted at different positions and the chain as the auxiliary belt, so that a large torque can be transmitted and elongation is prevented. And the plurality of first blocks serving as the blocks.
Adjacent links forming the two rows of chains, each of which is composed of a bifurcated branch portion inserted into the opening formed in the plate member and a base portion interposed between the bifurcated branch portions of the adjacent links, are adjacent to each other. Openings of the first plate members arranged in the openings formed in the plurality of second plate members as the blocks inserted between the first plate members and adjacent to each other via the second plate member. Since the blocks are connected by a plurality of pins having a diameter smaller than the thickness of the second plate member that connects the bifurcated bifurcated portion and the base portion, the locking of the link and the swing of the chain when the block comes into contact with the pulley Has the effect of making it even easier.

The steel belt according to the third embodiment of the present invention is
A plate member in which a flat part is formed in the upper part, an inclined part that expands upward as it goes upward is formed in the lower parts of both side walls, and horizontal parts are formed on the left and right with a concavo-convex part for positioning provided in the center sandwiched between A plurality of blocks that are arranged in a row in the vertical direction and that hold the belt, and a main hoop that is composed of stacked endless ribbons, is mounted on the flat part above the plurality of blocks and contributes to torque transmission, and The V is mounted below the main hoop of the block, and the blocks are arranged in line and are in contact with each other.
And a plurality of links inserted into narrow rectangular openings formed on the left and right of the plurality of first plate members as the blocks, and the adjoining first belt member. The first plate members arranged adjacent to each other via the second plate member are arranged in wide rectangular openings formed on the left and right of the plurality of second plate members as the blocks inserted between the first plate members. The plurality of second pins formed of a plurality of pins that connect adjacent links locked by the rectangular opening of the plate member and that have a wide rectangular opening formed therein.
At least one of the plate members includes a removable lower member.

The steel belt of the third embodiment having the above-mentioned structure is a block in which the main hoop of the laminated strips mounted on the upper flat part above the inclined part which contacts the pulley of the block is held in the pulley. The torque is transmitted by a tensile force due to friction between the block and the auxiliary belt mounted below the main hoop, the blocks are arranged in a row, and the blocks are pulled out from the pulleys. Adjacent links constituting the auxiliary belt inserted into the narrow rectangular openings formed on the left and right of the plate member of the plurality of blocks as a block inserted between the adjacent first plate members. A plurality of pins arranged in wide rectangular openings formed on the left and right of the second plate member and locked by the rectangular openings of the first plate members adjacent to each other via the second plate member. Connected by means of a block, enabling locking of the link and rocking of the chain when the block comes into contact with the pulley, and a wide rectangular opening formed in the last one of the plurality of second plate members. After disposing the pin on the part, a removable lower member can be attached.

In the steel belt of the third embodiment having the above-described action, the roles of the main hoop and the auxiliary hoop made of laminated ribbons mounted at different positions are shared, so that a large torque can be transmitted and stretched. In addition to the effect of preventing the above, the auxiliary belt mounted below the main hoop allows the blocks to be arranged in a row and the blocks to be pulled out from the pulleys, and the plurality of first plate members as the blocks can be removed. A plurality of second plates serving as the blocks, in which adjacent links that form the auxiliary belt and are inserted into the narrow rectangular openings formed on the left and right sides are inserted between the adjacent first plate members. By a plurality of pins arranged in the wide rectangular openings formed on the left and right of the member and locked by the rectangular openings of the first plate members that are adjacent to each other via the second plate member. Since the blocks are connected to each other, locking of the link and rocking of the chain are facilitated when the block comes into contact with the pulley, and a wide rectangular opening formed in the last one of the plurality of second plate members. This has the effect of making it possible to form a ring-shaped belt by disposing a pin on the section and then attaching a removable lower member.

[Brief description of drawings]

FIG. 1 is a plan view showing a continuously variable transmission according to a first embodiment of the present invention.

FIG. 2 is a front view showing the continuously variable transmission of the first embodiment.

3A is a front view and FIG. 3B is a sectional view showing a first block of the first embodiment.

FIG. 4A is a front view and FIG. 4B is a sectional view showing a second block of the first embodiment.

5A is a front view and FIG. 5B is a sectional view showing a third block of the first embodiment.

6 (A) is a plan view and FIG. 6 (B) is a side view showing a link of the chain according to the first embodiment.

FIG. 7 is a view of the steel belt of the first embodiment taken along line A- of FIG.
It is a longitudinal cross-sectional view taken along the line A.

FIG. 8 is a B- of FIG. 7 showing the steel belt of the first embodiment.
It is a cross-sectional view taken along the line B.

FIG. 9 is a cross-sectional view showing a state where the steel belt of the first embodiment is hooked on a pulley.

FIG. 10 is a diagram showing a comparison of transmission efficiency between the continuously variable transmission according to the first embodiment and the conventional continuously variable transmission.

FIG. 11 is a cross-sectional view showing a steel belt according to a third embodiment of the present invention.

FIG. 12 (A) is a front view showing a first conventional continuously variable transmission, and FIG. 12 (B) is a front view showing a block.

13A is a front view showing a steel belt of a second conventional continuously variable transmission, and FIG. 13B is a C of FIG.
It is a cross-sectional view taken along the line C.

FIG. 14 (A) is a partially enlarged view showing a steel belt of a second conventional continuously variable transmission, and FIG. 14 (B) is (A).
3 is a vertical cross-sectional view taken along the line D-D in FIG.

[Explanation of symbols]

1, 1A, 1B, 1C block 2 main hoops 3 chains 4 steel belt 5 input V pulley 6 output V pulley 10A, 10B glasses-like member 11A, 11B opening 12A slope 13A recess 14A convex 15A inclined part 16A Upper flat part 31 links 32 pins 5F, 6F Fixed pulley plate 5M, 6M moving pulley plate I input axis O output shaft 33 Auxiliary hoop

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-85547 (JP, A) JP-A-2-256939 (JP, A) Actual development Sho 62-126642 (JP, U) Special table Sho 59- 500924 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16G 1/00-17/00

Claims (2)

(57) [Claims] 1. A V-pulley arranged on an input shaft, a V-pulley having a large diameter arranged on an output shaft, a flat portion on an upper portion, and a slanted surface of the V-pulley on lower portions of both side walls. A plurality of blocks, which are plate members each having an inclined portion in contact with each other and are arranged in a row in the thickness direction to hold the belt, a main belt mounted on an upper flat portion of the plurality of blocks and contributing to torque transmission, A steel belt, which is mounted below the main belt of the block and is pulled out from the inclined surface of the V pulley which is in contact with the block, and the steel belt, wherein the auxiliary belt is a plurality of first belts. A plurality of links inserted into the narrow openings formed on the left and right sides of the plate member, and a plurality of second plate members as the blocks inserted between the adjacent first plate members. Placed in the formed wide opening If the diameter of the steel belt is smaller than the thickness of the second plate member connecting the adjacent links locked by the narrow opening of the first plate member adjacent to each other and the steel belt is damaged, the steel belt is first damaged. A continuously variable transmission characterized by comprising a two-row chain consisting of a plurality of pins designed to. 2. An inclined portion that expands upward as it goes upward is formed on the lower portions of both side walls, and an opening portion having a narrow first width is formed on the left and right sides of a concavo-convex portion for positioning provided in the center. A plurality of blocks in which a first plate member and a second plate member having a wide second width opening are formed in a row in the thickness direction, and a plurality of blocks and adjacent links are connected. A wide first plate member formed of a pin and interposed between two adjacent first plate members formed with a narrow first width opening. The pin having a diameter smaller than the thickness of the second plate member is arranged in the opening having the width of 2 and is locked by the narrow opening of the adjacent first plate member, so that the plurality of blocks are A steel belt characterized by having two rows of chains mounted in the left and right openings.