JP2000055135A - Heavy load transmission body of transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide elastic flexibility and durability by forming respective blocks arranged/supported in large numbers in an endless strap by arranging the elastic projecting part such as attaining a wedge effect by cooperating with adjacent blocks in a heavy load transmitting endless transmission body excellent in lateral pressure resistance from a pulley wheel. SOLUTION: A endless heavy load transmission body for a transmission is constituted by arranging an endless holder 11 and a large number of blocks 12 in an annular ring shape. In the respective blocks 12 an engaging projection 16 is arranged on the front side in the rectilinearly advancing direction S with the pressure receiving parts 13, 14 as the center, and the elastic projecting part 20 is also similarly arranged on the rear surface side. The elastic projecting part 20 projects so that the inclined part crosses at almost right angle, and the tip abutting part is molded in a trapezoidal shape. When the pressure receiving parts 13, 14 start to move by starting to receive pulley sandwiching pressure of a transmission wheel 1, the tip abutting part starts to advance while deforming the inclined part by stress, so that the part of a bending point of the blocks 12 can abut to the adjacent rear block 12 under strong pressure together with a wedge effect of the inclined part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt transmission for power transmission, and more particularly to an endless transmission for high load transmission having excellent lateral pressure resistance from a pulley wheel. In particular, the present invention relates to a continuously variable transmission that is installed in an industrial machine such as a machine tool, a vehicle, a motor, or the like, and is most suitable for transmitting constant horsepower power.

[0002]

2. Description of the Related Art As an endless transmission, many prior arts having a structure in which a number of links or blocks are arranged and supported on an endless strap have already been devised. Japanese Patent Application Laid-Open No. 2-275145 (Honda Giken Kogyo Co., Ltd.) is a concept in which a method for assembling a large number of metal blocks is improved by using a shape memory alloy for an endless strap. In addition, Japanese Patent Application
No. -100977 (Riken) suppresses the interference between a steel strap and a block by suppressing the movement between adjacent blocks. Furthermore, Japanese Patent Application Laid-Open No. 4-219548 (Kauchiyu, France) discloses an endless transmission body in which a number of U-shaped links are incorporated in a synthetic rubber belt having an endless core.

[0003] These belt transmission members are common in that pressure receiving portions are provided at left and right ends as positions for receiving pulley clamping pressure in the width (X) direction. All of the methods of absorbing the pulley clamping pressure in the X) direction are incomplete and insufficient. In particular, when applied to a continuously variable transmission, the pressure is applied to the belt transmission body from outside via a pulley wheel, and the pulley clamping pressure is increased by various external factors such as the magnitude of the load power, the presence or absence of a shift signal, and the speed. And speed vary greatly. Thus, in some cases, the clamping pressure is applied slowly, while in others, it is applied instantaneously and with an extremely large force. In this case, even if a pulley clamping pressure of any magnitude and at any speed is applied, the belt transmission body absorbs this instantly and does not damage both the friction surface of the pulley wheel and the belt transmission body. It is necessary to return to a stable power transmission state.

In the first two prior arts of the prior art, the block itself is a rigid body made of metal or the like and has no elasticity at all in the width (X) direction load to which the pulley clamping pressure is applied. Therefore, there is no elastic absorption capacity for the load. According to the idea disclosed by Couchille, the open end of the U-shaped link is slightly flexible in the width (X) direction, and the presence of some elastic absorption is recognized. However, since a synthetic rubber belt is used for the endless core, it cannot withstand a sufficiently large pulley clamping pressure. In addition, the positioning state of each link becomes unstable at the time of application, and the force of suppressing the arrangement state of each link does not work, so that the transmission operation is instantaneously unstable with respect to excessive pressure.

[0005]

SUMMARY OF THE INVENTION The high-load transmission of the transmission of the present invention is not limited to the case where pulley clamping pressure of any magnitude and at any speed is applied to the belt transmission via a pulley wheel. In order to guarantee the load absorbing capacity of the belt transmission body itself in the width (X) direction by a sufficient elastic force,
Each block itself has a function of converting a load in the width (X) direction into a load in the longitudinal (Y) direction by providing a function of converting the load in the width (X) direction into a load in the longitudinal (Y) direction. The other purpose is to cause the other blocks adjacent in the direction to sequentially achieve the function of dispersing and absorbing the load.

That is, a first object of the present invention is to transmit power while each block is in surface contact with an adjacent block when no pulley clamping pressure is applied, but load in the width (X) direction when pulley clamping pressure is applied. To provide a high-load transmission body that retains an elastic protrusion that cooperates with an adjacent block to achieve a wedge effect in order to convert into a load in the longitudinal (Y) direction.

A second object of the present invention is that each block is driven during power transmission by the wedge effect of the elastic protruding portion formed to protrude in the longitudinal (Y) direction both when the pulley clamping pressure is not applied and when the block is applied. An object of the present invention is to provide a high-load transmission body that ensures a stable supporting state while receiving an excessive load. In particular, when a pulley clamping pressure is applied, each block exerts a wedge effect between adjacent blocks, and the two pressure receiving portions A1,
Since a substantial three-point support structure is maintained between A2 and the tip contact portion C of the elastic protrusion, a high load transmission body which is sufficiently stable against a larger pulley clamping pressure in a stable state is provided. .

A third object of the present invention is that the elastic projection of each block has not only the elastic absorption due to the wedge effect in the longitudinal (Y) direction, but also the elastic flexibility of a synthetic resin belt. Pulley rotation center C0
The present invention provides a concept of a high-load transmission body that guarantees sufficient elastic absorption even with respect to the bending in the direction of the bending angle of forward and reverse rotation centered on.

[0009]

According to the present invention, there is provided a high-load transmission body comprising two pressure receiving portions (A ₁ , A ₂ ) for receiving a pulley clamping pressure.
In a high-load transmission of a transmission in which a large number of blocks (12) having
2) the pressure receiving portions (A ₁ , A ₂ ) which are arranged to be extendable and contractible in the width (X) direction in accordance with the magnitude of the pulley clamping pressure;
The front end contact is located at a predetermined distance L in the longitudinal (Y) direction perpendicular to the axis (X axis) in the width (X) direction between the two pressure receiving parts (A ₁ , A ₂ ) and connecting them. A contact (C) is provided, and is formed so as to protrude from the _two pressure receiving portions (A ₁ , A ₂ ) toward the front end contact point and has an elastic force in the width (X) direction between the pressure receiving portions (A ₁ , A ₂ ). The block (12) further includes an elastic protrusion (20) that ensures sufficient bending, and the block (12) further includes the pressure receiving parts (A ₁ , A) in the width (X) direction.
₂ ) By converting the amount of expansion and contraction displacement into the amount of expansion and contraction displacement of the contact C at the tip end of the elastic protruding portion (20), the clamping pressure in the width (X) direction is reduced by a plurality of adjacent pulleys in the longitudinal (Y) direction. Are sequentially dispersed in blocks.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a transmission, a belt transmission receives a pulley clamping pressure distributed over the entire frictional contact surface between a pulley wheel and a belt transmission during a constant speed ratio operation. At the start, since the contact radius r of the belt transmission member starts to fluctuate from one end, the total pressure of the pulley clamping pressure concentrates on the contact point having the shortest contact radius rmin at that time. This phenomenon occurs every time a shift command is supplied to the pulley vehicle.

At this time, in order for the transmission body to have a load absorbing function by an elastic force sufficient to completely absorb the pulley clamping pressure, only one or several blocks lack sufficient load absorbing ability. The elastic protrusion converts the expansion and contraction displacement in the width (X) direction into an expansion and contraction displacement in the longitudinal (Y) direction, and successively distributes the concentrated load to the neighboring blocks adjacent to those blocks also in the longitudinal (Y) direction. It is a thing. Therefore, when the speed ratio is rapidly changed in a short time, the concentrated load does not concentrate on one place on the pulley wheel and the transmission body, but is instantaneously dispersed in many blocks, so that the deformation and the damage are prevented. In addition, it is possible to shift the speed ratio of high-speed response and controllability without causing other transmission failures.

In the present specification, the description has been made mainly for a wet type transmission used in an oil reservoir, but the present invention is also applicable to a dry type transmission used in the air. Therefore, in the present embodiment, the endless strap and the block are also premised mainly on a metal rigid body, but the present invention is not limited to this, and the blocks may be alternately arranged by metal and resin, or the surface of the metal material may be coated with resin or It may be formed into a laminate, or all may be processed only with a resin material.

Further, the examples in which the elastic protrusions formed on the respective blocks shown in this specification are formed so as to protrude rearward in the traveling direction (rotation direction) of the belt transmission body are disclosed. However, conversely, it may be projected forward in the traveling direction. Also, in this embodiment, the V-shaped, trapezoidal or triangular or round bar-shaped protrusions are shown in the present embodiment with respect to the protruding shape of the wedge-shaped protruding portions. Any shape such as a conical shape, a U shape, or a tongue shape may be used as long as the inner and outer walls of the adjacent blocks penetrate and penetrate each other while maintaining elastic force.

[0014]

FIG. 1 is a partial side view showing a mounted state of a part of an endless high load transmission for a transmission according to a first embodiment of the present invention. In the figure, the left side of the transmission body shows a straight-forward pushing state P when no pulley clamping pressure is applied, and the right side shows an angle (θ) direction of a radius R0 about the rotation center C0 when the pulley clamping pressure is applied from the transmission wheel 1. Each of FIGS. 3A and 3B shows a pressurized friction state Q, and the two form a single endless transmission body 10 while being connected. For convenience of drawing, the entirety of the endless transmission body 10 is omitted, and only a part is illustrated.

The transmission body 10 is a belt-shaped endless holding body 11.
And a number of blocks 12 suspended from the holder 11 in a suspended state are arranged in an endless annular shape. It is assumed that the transmission body 10 rotates in the rotation direction of the transmission wheel 1 indicated by the arrow S. Each block 12 is connected to the front side in the straight traveling direction S around the pressure receiving portions 13 and 14 which receive the pulley clamping pressure in the width (X) direction of the transmission body 10 by the transmission wheel 1, that is, in the rotation axis direction. And an elastic projection 20 on the rear side, which also secures the connection between the blocks and maintains the elastic force in the width (X) direction. . At this time, each block 12 contributes to transmission while being surrounded by the endless holding body 11 while resisting the centrifugal force in the radial (Z) direction.

While the transmission body 10 is transmitting the constant speed ratio on the track M of the pulley wheel 1, the radii RA, R of the friction points A, B, C, D, E
B, RC, RD, and RE are all R0, and the pulley clamping pressure applied to the transmission body 10 from the pulley wheel 1 is distributed and pressed substantially uniformly over the entire circumference of the contact surface. However, when a speed change command or a disturbance enters from outside the transmission, the state of uniform dispersion of the clamping pressure is disturbed only for a moment until reaching the next constant speed state. Let us analyze the transmission state at the moment when the transmission body 10 is supplied from the outside with a shift command for changing from the constant velocity trajectory M with the speed ratio ε0 to the next speed trajectory M ′ with the speed ratio ε1. At this time, the transmission body 10 starts to move from the contact point A on the tension side toward B to E in order. Therefore, the contact diameter r at one moment at the time of the transition reaches the relationship of rA <rB <rC... RE as shown in FIG.

This means that the entire load of the pulley clamping pressure required for transmission concentrates at one point of the contact point A 'for one moment. The present invention allows each block 1
No. 2 provides sufficient elastic flexibility in the width (X) direction, so that an extremely large concentrated load applied instantaneously can be successively applied without being taken by only the block 12 at the point A 'instantly. This realizes a rigid transmission body 10 having a structure in which the load is distributed to points B ′, C ′, D ′, and E ′, which are constituted by other adjacent blocks 12. Preferably, the angle θ0 from the point A ′ to the end point E is about 45 °.
The temperature should be dispersed to about 170 degrees.

FIG. 2 shows the structure of a single block used in the high-load transmission body 10 of the first embodiment shown in FIG. 1, FIG. 2A is a rear view of a block 12L with a left locking member, and FIG. FIG. 2C is a side view of the block 12L. Further, FIG. 2D shows a rear view of the block 12R with the right locking member held by the endless holding body 11.
In FIG. 2A, the left locking block 12L is provided with a locking member 17L for preventing the falling from the endless holder 11 above the left pressure receiving portion 13 and in the vicinity thereof, the length (Y) of the pressure receiving portion 13 is shown. A through hole 15 having a thickness of 1 m is provided in the direction. Further, as shown in FIG. 2B, the right pressure receiving portion 14 is provided with an engagement protrusion 16 having a length of 1 m substantially equal to a thickness of 1 m in the longitudinal (Y) direction at a position at the same height. On the other hand, as shown in FIG. 2D, opposite to the block 12L, the right-side locking block 12R in which the locking member 17R and the through-hole 15 are provided in the pressure receiving portion 14 and the engagement protrusion 16 is provided in the pressure receiving portion 13, respectively. Is also prepared in advance. In FIG. 2D, the pulley wheel 1 including the two wheels 1a and 1b and the endless holding body 11 are shown at the same time.

In this embodiment, each block 12L, 12R
In each case, an elastic protrusion 20 is arranged between the two pressure receiving portions 13 and 14, and the whole is integrally processed with a single metal elastic material to form a single block 12. Further, in this example, the elastic protruding portion 20 protrudes in the longitudinal (Y) direction of the transmission body 10 so that the flat plate inclined portions 20a, 20a of the elastic material alternate at a substantially right angle θ = 90 degrees as shown in FIG. 2B. The tip contact portion 20b is formed in a trapezoidal shape. Moreover, as shown in FIG. 2E, the thickness 1 of the pressure receiving portions 13 and 14 in the longitudinal (Y) direction is increased.
m is selected to be a thickness determined by 1n = 1m × sin θ2 according to the magnitude of the inclination angle θ2 with respect to the thickness 1n of the inclined portion 20a. Thus, at the time of the straight push-in operation shown in FIG. 1, not only the front and rear flat portions of the pressure receiving portions 13 and 14 come into close contact with each other but also between the adjacent blocks 12.
At this time, the flat portions of the inclined portions 20a and 20b of the elastic protruding portion 20 also at the same time ensure close contact between the blocks.

As shown in FIG. 2C, the front sides of the pressure receiving portions 13, 14 and the inclined portions 20a and the trapezoidal portions 20b of the elastic protrusions 20 are all flat, while the rear side is a U-U line shown in FIG. 2A. The upper side is a plane portion 13a, 14a, 20f,
20i, the bent portions 13b, 14b, 20
g, 20h. Accordingly, when the transmission body 10 shown in FIG. 1 enters the pressure friction position with the contact radius R0, each block 12 is determined with respect to the rotation center C0 of the transmission wheel 1 by the radial (Z) determined according to the speed ratio ε. Approximately equal angle θ in the direction
It is configured so that it can be arranged with 1. The bent portion may be a straight inclined plane or an arcuate arm curved plane. The former contacts at the same bending point F even if the speed ratio ε changes, whereas the latter contacts the contact point. The position changes according to the speed ratio.
In this embodiment, the bent portions 13b and 14b are formed in a straight line, and the bent portions 20a and 20b are formed in an arm shape. In this pressurized friction state Q, the elastic projections 20 of the respective blocks 12 are positioned in a stable state by the endless strap 11 while being inclined, and the bent arm cutouts 20f for abutting according to the speed ratio ε.
Is applied to the upper end of the elastic projection 20.

FIG. 3 is a block assembly diagram showing a state in which the above-described two types of blocks 12L with a left locking member and blocks 12R with a right locking member are assembled to an endless strap holder 11. Each of the two pressure receiving portions 13 and 14 has a through hole 1
5 and the engagement projections 16 are alternately provided, so that the adjacent blocks are assembled with the engagement projections 16 inserted into the through holes 15. 17L at the same time, 1
7R is similarly protruded alternately from the pressure receiving portions 13 and 14,
An insertion space 19 is left between the two. This insertion space 1
The holding gap 18 is used as an installation space for the strap 11 through the opening 9. At this time, the blocks 12L and 12R are arranged all around the endless holding body 11, and the blocks 12L and 1R are moved so that each block 12 can be pressed and moved on the holding body 11.
2 is installed to such an extent that a slight gap is left.

FIGS. 4A and 4B are operation explanatory diagrams of a block for explaining the operation of the high load transmitting body of this embodiment with reference to the top view of FIG. 2B. FIG. 4A shows the elastic absorption force of the pulley clamping pressure. FIG. 4B is an operation explanatory view showing a deformed state of the elastic projection portion 20 before and after receiving the clamping pressure, and FIG. 4C is a diagram showing a contact state between adjacent blocks and a three-point support structure. It is operation | movement explanatory drawing. For convenience of explanation, FIG. 4A
As shown in the figure, the transmitting body 1 connecting the two pressure receiving portions 13 and 14
It is assumed that the direction of the width W of 0 is the X axis, the longitudinal direction of the transmission body 10 is the Y axis, and the radial direction shown in FIG. 1 is the Z axis.

In the continuously variable transmission, two conical wheels 1a, 1b
In order to secure a predetermined transmission power by changing the relative distance of the transmission member 10 and changing the friction pressure, a pulley clamping pressure whose size and speed fluctuate freely is applied to the transmission body 10. In response to this, a pulley clamping pressure is applied to the friction surfaces a1 and a2 from both sides of the arrows A1 and A2 on each block 12, and the end a'1 of the elastic protrusion 20 formed in a trapezoidal wedge or cone shape. ,
a′2 through the leaf spring inclined portions B and B ′
Is pressurized toward the virtual connection point a0. In the block 12 of this embodiment, the tip contact portion C is provided with a trapezoidal portion 20b in order to secure a certain degree of mobility. However, as shown in FIG. , A1 and a3 indicate that a stable support state can be maintained on the XY plane. In addition, since the endless strap 11 is positioned in the Z-axis direction, the individual blocks 12 can maintain a substantially perfect stable position during transmission in any of the X-, Y-, and Z-axis directions. Is done.

In particular, there are two main features of the present invention. The first feature is that even if the pulley clamping pressure applied from the transmission wheel 1 is applied with a small load and gently, or conversely when the load is extremely large and applied instantaneously, Since the transmission body 10 itself has a sufficient elastic absorption force enough to absorb quickly, the highest speed ratio ε
That is, the shift time from the maximum speed to the minimum speed ratio εmin can be controlled extremely shortly. The second feature is that even if an extremely large instantaneous load is applied to only a small number of blocks 12, this load is instantaneously distributed to a plurality of other blocks adjacent to each other. That there is no mechanical damage to the

Referring now to FIG. 4B, the basis for these features according to the present invention will be described. In the figure, the right figure (i)
FIG. 4A shows a state in which no pulley clamping pressure is received from the pressure receiving points a1 and a2, and FIG.
The pressure receiving portions a1 and a2 are separated by b1 and b2 by a distance β in the width (X) direction.
Only the elastically contracted state is shown.

FIG. 4B- (i) shows that the elastic projection 2
The angle θ of the 0 leaf spring inclined portions 20a and 20b remains substantially 90 ° as shown in FIG. 2B. However, once the transmission wheel 1 starts receiving the pulley clamping pressure, the pressure receiving portions 13 and 14
Starts moving, and as shown in FIG. 4B- (ii), the slope 2
While both 0a and 20b undergo stress deformation, the tip contact point also starts to advance from a0 to b0, and its movement distance α is 10 (=
102-101). Since the tip end of the present embodiment actually forms a trapezoidal portion 20c, the bent points a01 and a02 of the block 12 are different from the rear block 12 adjacent to the conical inclined portions 20a and 20b. As a result of the contact with a strong pressure together with the wedge effect, the block 12 has the pressure receiving points b1 and b2 of the pressure receiving portions 13 and 14 and the tip contact portion b0.
1 and b02 are firmly supported by the three-point support effect of the substantial tip contact portion b0.

Further, FIG. 4C illustrates that the action of the elastic projection 20 simultaneously achieves a special pressure distribution or conversion function. In other words, the pulley clamping pressure in the X-axis direction applied through the pressure receiving portions 13 and 14 of the elastic projecting portion 20 of the block 12-1 is reduced by the wedge-shaped inclined portions 20a and 20b.
Of the other blocks 12-0,
Since the pressure to 12-1 is changed, block 12-2
Means that the pressure starts to incline around the bending point F2 and is converted into the pressure in the Y-axis direction via the contact point E. Even when the transmission body 10 of the present embodiment is manufactured entirely from a rigid metal body,
This means that it provides a pressure dispersing function substantially equivalent to that of a flexible transmission member made of a resin material such as synthetic rubber. This means that when the magnitude of the pulley clamping pressure in the width (X) direction is small and gentle, only a small number of blocks 12 in the longitudinal (Y) direction after the conversion absorb the pressure. However, even in the case of an instantaneous and excessive pressure, a large amount of contraction in the width (X) direction is instantaneously dispersed to a large number of blocks 12 in the longitudinal (Y) direction. No damage. As a result, stable transmission is possible even if the shift time from the lowest to the highest speed ratio is reduced.

In this embodiment, the inclination angles θ and θ2 of the inclined portion 20a can be changed as required, and the shape of the trapezoidal portion 20b can be arbitrarily changed as long as the trapezoidal portion 20b substantially fulfills the three-point support function. is there. The technical concept relating to the load distribution by the steep impact load, which is the second feature of the present invention, is described in Japanese Patent Application No. 8-355,505 filed by the present applicant. Omit.

[0029]

FIG. 5 shows an endless high load transmission of a transmission according to a second embodiment of the present invention. FIG. 5A shows block 1 of the transmitter.
FIG. 5B is a front sectional view showing the holding member 11 and the block 1.
5C is a top view of FIG. 5B, and FIG. 5D is a partial configuration diagram showing a cutout for insertion of the holding body 11 formed on the block 12. As shown in FIG. Also in this example, the first
The basic concept of "converting the pulley clamping pressure in the width (X) direction into an elastic force in the longitudinal (Y) direction" of the embodiment is used. However, since some new technical ideas are disclosed, only the new technical ideas will be described for each item in comparison with the first embodiment.

(1) First, the idea is that the endless holding body is not a belt-shaped slap but an endless wire rope 11 made of a single-filament fiber or steel wire or the like formed into a ring shape. Each block 12 is individually slidably supported on the holder 11 through a through hole 18 formed in the block 12 and having a circular cross section.
(2) Secondly, the shape of the elastic protruding portion 20 formed on the block 12 is not simply a bent formed body made of an elastic flat plate,
This is an idea of a configuration in which the surrounding portions 20j and 20k protrude in a substantially semi-elliptical shape as a three-dimensional three-dimensional structure. That is, as shown in FIGS. 5A and 5C, the cross-sectional shape of the line XX is
The V-shaped or U-shaped wedge shape substantially equivalent to that of FIG. 2B of the first embodiment is retained, and the three-point support structure of the pressure receiving portions A1, A2 and the contact portion C and the clamping pressure distribution mechanism by the wedge effect are the same. Configuration. However, in this example, a virtual tip contact point D is further assumed in the Z-axis direction, and the two elastic inclined portions 20a and 20
a is the inclination angle θ3 toward the lower side of the Z axis (the inner side of the transmission body).
V-shaped or U-shaped wedge shape. As a result, as shown in FIG. 1, each block is bent not only in the longitudinal (Y) direction but also in the bending angle (θ) about the pulley rotation axis C0.
As for the flexibility in the 0) direction, a predetermined elastic absorption force is given by the second wedge effect. That is, the transmission body 10
Increases the internal elastic force as the radius of curvature R of the transmission becomes smaller, and consequently the irregular movement of the transmission body 10 due to a sudden disturbance impact force applied from outside the transmission via a pulley wheel. Is suppressed not only in the longitudinal (Y) direction but also in the radial (Z) direction by a plurality of adjacent blocks.

(3) The elastic protruding portion 20 has the tip through hole 1
In order to insert the wire rope 11 into 8, a cutout 21 is made in a part of the three-dimensional surrounding structure. As shown in FIG. 5C, the block 12 includes a first block 12R 'having a right incision 21R and a second block 12L' having a left incision 21L separately prepared in advance at the line YY. Is done. Similarly to the attachment of the through holes 15 and the engagement projections 16, first and second blocks 12R 'and 12L' are alternately arranged on the holder 11, thereby preventing the blocks from dropping out of the through holes 18. I have. FIG. 5D shows the state of the incision 21. Each of the joining pieces 22 and 23 has the projections 22a and 23a and the recesses 22b and 23b connected to each other, and the locking portions 22c of each other.
And 23c, the connected state is maintained even when pressure is applied in the directions of arrows V and W in the figure. However, the endless holder 11
At the time of assembling, the incision 21 is opened to the joining piece 23 ′ shown by the dotted line and inserted from the space 19. (4) Further, in order to compensate for the reduction in the strength of the elastic force of the elastic projecting portion 20 due to the incision 21, the V-shaped projecting elastic member 26 is interposed above the two pressure receiving portions 13 and 14. The two elastic plate members 2a and 25b are held on the pressure receiving portion by spot welding 27 to enhance the elastic force.

(5) As shown in FIGS. 5A and 5B, another imaginary tip contact point D 'is newly set at a position symmetrical to the tip contact point D, and a new elasticity indicated by a dotted line 24 is provided. The inclined portions 20a ', 20a' may be V-shaped at an angle θ4 to form a third wedge-shaped projection. This ensures not only the elastic bending portion 24a on the inner peripheral side of the transmission body around the rotation center C0 but also the elastic reverse bending portion 24b on the outer peripheral side of the transmitting body when the endless transmission body 10 is bent to the opposite side. belongs to. In particular, as described with reference to FIG. 1, the pulley load concentrates on the minimum contact point A 'at the moment when the shift command is received, and the pulley wheel 1 keeps the transmission body 10 sandwiching the point A' with the next rotation. Further, at the next moment, the transmission body 10 is pulled in the M "direction, so that at the point A", the transmission body 10 reverses the angle θ0 to 180 ° or more, contrary to the normal bending property. This prevents the reverse bending impact force from concentrating on the point A ″ only at the point 12 and provides the reverse wedge effect of absorbing the concentrated load by the elastic absorption force of the tip contact point D ′.
With this configuration, the transmission body 10 forms the elastic protruding portion 20 into a three-dimensional tongue shape, and has a longitudinal (Y) direction and a normal rotation bending angle (θ0).
By applying the wedge effect in each of the three directions, that is, the reverse bending angle (θ0 ′) direction, the elastic bending property and the clamping pressure dispersing function substantially equal to those of the synthetic rubber belt can be maintained.

[0033]

[Other Embodiments] In the first and second embodiments described above, each block 12 is formed by bending a pressure receiving portion 13, 14 and an elastic projecting portion 20 from a single metal material made of a predetermined elastic material. Although the example of the transmission body for is disclosed, it is not limited to a single metal material, the whole may be molded with a resin material mixed with reinforcing fibers, or a configuration in which this resin material is laminated to a metal elastic material Is also good. Further, the shape of the elastic protrusion 20 may be any shape as long as sufficient elasticity is secured in the width (X) direction or the bending angle (θ0) direction of the radius R with the pulley clamping pressure applied from the pressure receiving portion. . Further, the concept of the present invention can be applied to a transmission body for a dry transmission. For example, the pressure receiving portions 13 and 14 may be made of an oil-containing metal such as an oilless metal, and the elastic protrusions may be made of an elastic metal. . As described above, the present invention is not limited to only the described embodiments, and any changes within the scope of the claims are included in the scope of the present right.

[0034]

The high-load transmission body of the present invention mainly uses a metal material or a rigid material such as a composite material of metal and resin / fiber, while using a conventional resin-made transmission body. On the basis of the same principle as that of the flexible structure, the present invention realizes sufficient elastic flexibility and sufficient durability applicable to high load applications. By assuring sufficient elasticity and flexibility while using this rigid material, the conventional resin transmission body can only transmit power of tens of horsepower [HP] or less, whereas tens of horsepower to several tens of horsepower [HP]. Power of more than one hundred horsepower [HP] is reduced in size and high-speed transmission is enabled.

In the transmission body of the present invention, when the pressure receiving portion of each block receives and contracts in the width (X) direction due to the pulling pressure, the elastic projection portion made of an elastic material formed to project in the longitudinal (Y) direction. The position of the tip contact point is converted into an extension / contraction operation in the longitudinal (Y) direction. Thus, while strongly connecting the adjacent blocks in the longitudinal (Y) direction, the load in the width (X) direction of the pulley clamping pressure is instantaneously dispersed in the longitudinal (Y) direction of the transmission body, and at the same time, positioning of each block is performed. The effect of stabilization is always activated during transmission.

In particular, the pressure receiving and dispersing function of the high load transmission body produces two great effects when applied to a continuously variable transmission. One of them is that the shift time from the lowest speed Vmin to the highest speed Vmax can be reduced. That is, the transmission body has a high-speed response capability that responds to a sudden change in the pulley clamping pressure even when the speed of the shift control is sharply performed. Secondly, even when an irregular or impulsive pulley clamping pressure is applied inward from an input / output device external to the transmission, the belt transmission body itself has sufficient multiaxial directions of each block. Due to the elasticity and flexibility, the impact is not concentrated on a small number of blocks, but is instantaneously dispersed over a large number of blocks in the longitudinal (Y) direction. With these two abilities, it is possible to maintain the same elastic absorption function and pressure dispersing function as a rubber belt, while being a rigid material, and to transmit a high load power that is incomparable with a resin belt in a small size and at a high speed.

[Brief description of the drawings]

FIG. 1 is a partial configuration diagram illustrating a part of a high-load transmission body of a transmission according to a first embodiment of the present invention.

FIG. 2A is a rear view of a block with a left-side stopper used in the high-load transmission body of the embodiment,

FIG. 2B is a top view of the same block used in the high-load transmission body of the embodiment,

FIG. 2C is a side view of the same block of the high-load transmission body of the embodiment,

FIG. 2D is a rear view of the block with the right locking member used for the high-load transmission body of the embodiment;

FIG. 2E is a partial cross-sectional view showing the thickness of a block member of the high load transmission body of the embodiment.

FIG. 3 is a partial assembly view showing a procedure of assembling the blocks of the high load transmission body of the embodiment.

FIG. 4A is an operation explanatory diagram showing a pressure receiving conversion function of a block of the high load transmitter according to the embodiment;

FIG. 4B is an operation explanatory view showing a distributed deformation state of the blocks of the high load transmission body of the embodiment;

FIG. 4C is an explanatory diagram of an operation in a chain state between the blocks of the high load transmission body of the embodiment.

FIG. 5A is a front sectional view showing a block of a high load transmission body of a transmission according to a second embodiment of the present invention;

FIG. 5B is a side sectional assembly view of the same block of the high load transmission body of the embodiment.

FIG. 5C is a top assembly view of the same block of the high-load transmission body of the embodiment, and FIG.

FIG. 5D is a partial configuration diagram of an incision made in the same block of the high-load transmission body of the embodiment.

[Explanation of symbols]

 1, 1a and 1b Transmission wheel or pulley wheel 2 Rotary shaft 10 High load transmission, belt transmission or transmission 11 Endless holder, strap or wire rope 12 Block or link 12L Left side (with lock) block or second Block 12R Right side (with lock) block or first block 13, 14 Pressure receiving portion 13a, 14a Flat portion 13b, 14b Inclined portion or bent portion 13c, 14c Flat portion 15 Through hole 16 Engagement protrusion 16a Concave portion 17 Lock Tool 18 Holding gap or through hole 19 Insertion space 20 Elastic protrusion 20a Inclined portion, leaf spring inclined portion or wedge-shaped portion 20b Tip contact portion or contact portion 20c Inner wall 20d Contact inner wall 20e Arm bent portion 20f, 20i Flat portion 20g, 20h Arm bent portion or inclined portion 20j, 20k Surrounding portion 21, 21R, 21L Incision part 22,23 Joint piece 22a, 23a Convex part 22b, 23b Recess 22c, 23c Lock part 24a Elastic bending part 24b Elastic reverse bending part 25 Elastic plate material 26 Elastic material 27 Welding part

Claims (10)

[Claims] In a high load transmission of a transmission in which a plurality of blocks having two pressure receiving portions for receiving a pulley holding pressure are supported by an endless holding member, the block is adapted to the magnitude of the pulley holding pressure. A pressure receiving portion arranged so as to be extendable and contractible in the width (X) direction, and a longitudinal (Y) axis positioned between the two pressure receiving portions and perpendicular to an axis (X axis) in the width (X) direction connecting the two pressure receiving portions. A tip contact point is provided at a position at a predetermined distance L in the direction, and is formed so as to protrude from the two pressure receiving parts toward the tip contact point, so that it is sufficiently bent with elasticity in the width (X) direction between the pressure receiving parts. And the block further converts the amount of expansion and contraction of the pressure receiving portion in the width (X) direction into the amount of expansion and contraction of the contact point at the tip end of the elastic protrusion. Pulley clamping pressure in the longitudinal direction (Y), A high-load transmission for a transmission, which is sequentially dispersed in locks. 2. The method according to claim 1, wherein the thickness of the elastic protrusion is determined by a product of a thickness of the pressure receiving portion and a sine value of a mounting angle θ2 of the pressure receiving portion and the elastic protrusion. A high load transmission for a transmission. 3. The elastic projection according to claim 2, wherein the elastic projection has a first wedge-shaped projection formed in a longitudinal (Y) direction in a cross-sectional shape on an XY plane, and the outer wall surface and the inner wall surface are clamped by a pulley. A high-load transmission body for a transmission, wherein surface contact is made between an inner wall surface and an outer wall surface of an adjacent block when pressure is not applied. 4. The elastic projection according to claim 3, wherein the elastic projection is substantially located between the front end contacting portion when the pulley clamping pressure is applied and the two pressure receiving portions juxtaposed in a radial lure (Z) direction. A high-load transmission for a transmission having a three-point support structure. 5. The method according to claim 3, wherein the elastic protrusion has two flat plate inclined portions, and the upper side of the inclined portion is formed into a flat portion and the lower side is formed into an arm bent portion. High load transmission for transmission. 6. The elastic projection according to claim 2, wherein the elastic projection further has a wedge-shaped projection formed in a longitudinal (Y) direction in a cross-sectional shape on the XZ plane, and the pulley clamping pressure is reduced by a three-dimensional closed annular inclined portion. A high-load transmission body for a transmission characterized by being absorbed. 7. The elastic projection according to claim 6, wherein the elastic projection has a second wedge-shaped projection formed in a radial (Z) direction in a cross section in an XZ plane and on an inner peripheral side of the transmission body.
A high load transmission body for a transmission, wherein the transmission body maintains a bending elastic force in a forward rotation bending angle (θ ₀ ) direction. 8. A third wedge-shaped protrusion according to claim 7, wherein the elastic protrusion has a radial (Z) cross-section in an XZ plane and an outer peripheral side of the transmission body.
A high load transmission body for a transmission, wherein the transmission body maintains a bending elastic force in a reverse bending angle (θ ₀ ′) direction. 9. The first block according to claim 1, wherein the block includes a first block having an engagement protrusion on one side of the two pressure receiving portions and a through hole on the other side, and a through hole on one side and the other. A second block having an engagement protrusion on the side, wherein the first and second blocks are alternately combined in the longitudinal (Y) direction and the engagement protrusion is always inserted into the through hole. Transmission high load transmission. 10. The block according to claim 1, wherein the block has a right block to be loaded into the endless holder from a right opening, and a left block to be loaded from a left opening. A high load transmission body for a transmission, wherein the transmission body is arranged so as to be alternately combined in a longitudinal (Y) direction.