JP3695216B2 - Assembly type transmission V belt - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement proposal of an assembly-type transmission V-belt that is useful for transmitting power by being spanned between pulleys having variable groove widths such as continuously variable transmissions.
[0002]
[Prior art]
As a conventional assembly-type transmission V-belt, for example, an assembly-type transmission V-belt for a continuously variable transmission as disclosed in JP-A-5-1066891 is known.
As shown in FIGS. 12 to 14, this is composed of a V-shaped block 3 as shown in FIG. 12 and an endless band 2 spanning the V-shaped block 3 as shown in FIGS. 13 and 14.
[0003]
As shown in FIG. 12, the V-shaped block 3 is provided with inclined end surfaces 5 to be brought into frictional contact with both side walls of the pulley V-groove in the base portion 4, and the base portion 4 is shaped into a V shape, and above the V-shaped base portion 4. Hook portions 6 are provided in parallel to each other, and band assembling grooves 7 are defined on both sides of the V-shaped block 3 in the width direction.
The hook portion 6 of the V-shaped block 3 has a projection 8 for restricting relative displacement in the width direction between adjacent V-shaped blocks 3 at the center thereof, and a hole 9 into which the projection 8 is fitted (see FIGS. 13 and 13). 14).
[0004]
Such a V-shaped block 3 has a large number of V-shaped blocks 3 as one set as shown in FIG. 13 showing a large-diameter pulley winding state and FIG. 14 showing a small-diameter pulley winding state. The transmission V belt is arranged by continuously arranging the endless band 2 over the band winding surface 7a in the band assembling groove 7 provided through the V-shaped block 3 in the thickness direction as described above. assemble.
The endless band 2 is formed by laminating a plurality of band elements 2a.
[0005]
Such an assembly-type transmission V-belt is practically used by being wound between, for example, a drive pulley and a driven pulley (not shown), and the pulley described in the above document has a configuration in which the pulley V-groove width is variable. Thus, the wrapping radius of the assembly-type transmission V-belt around these pulleys can be continuously changed, and continuously variable transmission can be performed.
[0006]
Locking edges 10 and 11 formed so as to extend in the width direction of the V-shaped block 3 are provided on one surface of the V-shaped block 3 in the V-belt running direction. By allowing the shape blocks 3 to be inclined relative to each other, the assembly-type transmission V-belt can follow the pulley winding arc as shown in FIGS.
[0007]
In this case, since the locking edges 10 and 11 are formed in two stages having different levels in the height direction of the V-shaped block 3, the winding radius (pulley diameter) of the assembly-type transmission V belt with respect to the pulley is large. The relative inclination position between the adjacent V-shaped blocks 3 can be changed between the medium-diameter and the small-diameter, and the arrangement pitch width between the adjacent V-shaped blocks 3 can be increased or decreased to increase the substantial circumference of the endless band 2. The length can be changed, and the amount of band misalignment between pulleys associated with gear shifting can be kept small.
[0008]
[Problems to be solved by the invention]
However, in the case of the conventional assembly-type transmission V-belt, as represented by the above, the positions of the locking edges 10 and 11 and the band winding in the band assembly groove 7 in the height direction of the V-shaped block 3 The position of the surface 7a is deviated, and at least a distance h in the height direction of the V-shaped block 3 therebetween.₁Therefore, when the assembly-type transmission V-belt moves in and out of the pulley as described below, the laminated endless band 2 and the band winding surface 7a in the band assembling groove 7 are relatively slipped and rubbed. There was a loss.
[0009]
That is, FIG. 15 explains in detail the movement of the V-shaped block 3 when the assembled transmission V-belt enters and exits the pulley. When the assembled transmission V-belt is in the linear region between the pulleys, the adjacent V-shaped block 3 3 are in close contact with each other in the region of the band winding surface 7a, but when the assembly-type transmission V-belt is in the pulley winding region, the adjacent V-shaped block 3 has a locking edge 10 (following the pulley winding arc). 11) are inclined with each other as a rotation pitch (inclination angle is indicated by θ).
Here, the band winding surface 7 a and the rocking edge 10 (11) are separated by a distance h (h in the height direction of the V-shaped block 3.₁, H₂), A gap of h × tan θ is generated between adjacent V-shaped blocks 3 at the band winding surface 7a when in the pulley winding region.
[0010]
For this reason, when the assembly-type transmission V-belt moves from the pulley linear region to the pulley winding region, or conversely, when the assembly-type transmission V-belt moves from the pulley winding region to the pulley linear region, the laminated endless band 2 and the band winding The relative position with the hooking surface 7a changes, and slippage occurs between the two.
By the way, there is a problem that a load acts between the laminated endless band 2 and the band winding surface 7a to enable power transmission, and friction loss occurs due to the above-mentioned slip.
[0011]
Even if a rocking edge is provided at the boundary between the base 4 of the V-shaped block 3 and the band mounting groove 7, the adjacent V-shaped block 3 also has the base 4 and the band mounting groove 7 at the boundary. Since the rocking edge falls into the band mounting groove 7 of the adjacent V-shaped block 3, the V-shaped block 3 will be displaced relative to its height direction. I confirmed that it could not be a good solution.
[0012]
Further, in the case of a conventional assembly type transmission V-belt, as described in, for example, Automobile Engineering Society Proceedings No. 9,439,285 “Friction and vertical drag acting on block of metal V-belt for CVT”. 13 and 14, a distance h in the height direction of the V-shaped block 3 from the center of frictional contact of the V-shaped block 3 with respect to both side walls of the pulley V-groove._ThreeSince it was customary to locate the band wrapping surface 7a at a location that is far away,
In the pulley winding region, the laminated endless band 2 causes a rotational moment to act on the V-shaped block 3, which may deform or incline it, and may reduce the transmission efficiency especially when the transmission torque is large.
[0013]
  According to the first aspect of the present invention, the former problem relating to the conventional assembly-type transmission V-belt, that is, a gap is generated at the band winding surface between adjacent V-shaped blocks in the pulley winding region, and friction loss is reduced. Resolve the problem that occurredAt the same time, the endless band deforms the V-shaped block because the band winding surface is displaced in the height direction of the V-shaped block from the pulley V groove contact center point of the V-shaped block in the pulley winding area. To solve the problem of reduced transmission efficiencyFor the purpose.
[0014]
  According to a second aspect of the present invention,Bands between pulleys that accompany gear shifting so that the relative inclination position between adjacent V-shaped blocks can be changed accordingly when the pulley winding diameter of the assembly-type transmission V-belt changes from large, medium and small. While making it possible to reduce the amount of misalignment, It is an object of the present invention to achieve the effect of the first invention most efficiently.
[0015]
  According to a third aspect of the present invention,While solving the former problem related to the conventional assembly type transmission V-belt, that is, a gap is generated in the band winding surface between adjacent V-shaped blocks in the pulley winding area, and friction loss has occurred, Bands between pulleys that accompany gear shifting so that the relative inclination position between adjacent V-shaped blocks can be changed accordingly when the pulley winding diameter of the assembly-type transmission V-belt changes from large, medium and small. The object is to make it possible to keep the misalignment amount small.
[0016]
According to a fourth aspect of the present invention, the assembly type transmission in which the operation and effect of the first to third aspects of the invention are achieved while increasing the transmission capacity between the endless band and the V-shaped block. An object is to provide a V-belt.
[0017]
According to a fifth aspect of the present invention, there is provided an assembly-type transmission V-belt in which mutual inclination between adjacent V-shaped blocks necessary for following the pulley winding arc in the pulley winding region is stably performed. The purpose is to provide.
[0018]
[Means for Solving the Problems]
  For the above purpose, first, the assembly type transmission V belt according to the first invention is:
  A large number of V-shaped blocks formed in a V shape with inclined end faces that make frictional contact with both side walls of the pulley V-groove are continuously arranged in an endless manner to form a V-belt, and the thickness of these V-shaped blocks An endless band is wound around a band assembly groove provided in a direction extending in the direction and assembled into a V-belt shape, and is extended in the width direction of the V-shaped block on at least one of the opposing surfaces of adjacent V-shaped blocks. In the assembly type transmission V belt which can follow the pulley winding arc by making the adjacent V-shaped blocks tiltable relative to each other with the rocking edge formed to be present as the rotation pitch,
  A band winding surface in the band assembling groove that the inner peripheral surface of the endless band contacts, and the rocking edge of the V-shaped block,In the height direction of the V-shaped block, the same friction contact center point of the V-shaped block inclined end surface with respect to both side walls of the pulley V-grooveIt is characterized by being positioned at a level.
[0019]
  The assembly type transmission V belt according to the second invention is the above-mentioned first invention,The locking edge is formed in two stages having different levels in the height direction of the V-shaped block, and among these locking edges, a lower locking edge; The band winding surface in the band assembly groove is positioned at the same level in the height direction of the V-shaped block.It is characterized by this.
[0020]
  The assembly type transmission V belt according to the third invention is
  A large number of V-shaped blocks formed in a V shape with inclined end faces that make frictional contact with both side walls of the pulley V-groove are continuously arranged in an endless manner to form a V-belt, and the thickness of these V-shaped blocks An endless band is wound around a band assembly groove provided in a direction extending in the direction and assembled into a V-belt shape, and is extended in the width direction of the V-shaped block on at least one of the opposing surfaces of adjacent V-shaped blocks. In the assembly type transmission V belt which can follow the pulley winding arc by making the adjacent V-shaped blocks tiltable relative to each other with the rocking edge formed to be present as the rotation pitch,
  The locking edge is formed in two stages having different levels in the height direction of the V-shaped block, and the lower edge of the locking edge and the inner peripheral surface of the endless band are in contact with each other in the band assembly groove. The band winding surface was positioned at the same level in the height direction of the V-shaped block.It is characterized by this.
[0021]
The assembly type transmission V-belt according to the fourth invention is any one of the first to third inventions,
The band assembling grooves are formed symmetrically on both sides in the width direction of the V-shaped block, and the rocking edge is formed at the neck between the band assembling grooves.
[0022]
The assembly type transmission V-belt according to the fifth invention is any one of the first to third inventions,
The band assembling groove is formed in the center of the V-shaped block in the width direction, and the locking edges are formed on both sides of the band assembling groove.
[0023]
【The invention's effect】
The assembled transmission V-belt according to the first aspect of the present invention has a large number of V-shaped blocks having inclined end faces that are in frictional contact with both side walls of the pulley V-groove, and are continuously arranged in an endless manner. When it is assembled by winding an endless band, a rocking edge formed so as to extend in the width direction of the V-shaped block on at least one of the opposing surfaces of adjacent V-shaped blocks has a rotational pitch. Since the adjacent V-shaped blocks can be inclined relative to each other, the assembly-type transmission V-belt can be made to travel along the pulley winding arc in the pulley winding region.
[0024]
  By the way, in the first invention, in particular, the band winding surface in the band assembling groove that the inner peripheral surface of the endless band contacts, and the rocking edge of the V-shaped block,In the height direction of the V-shaped block, the same friction contact center point of the V-shaped block inclined end surface with respect to both side walls of the pulley V-grooveBecause it ’s located in the level.
  When adjacent V-shaped blocks incline around the pulley winding arc in the pulley winding area and incline with each other with the rocking edge as the rotation pitch, this inclination is caused around the band winding surface. The relative position of the winding surface in the longitudinal direction of the band is kept the same when the V-shaped block is inclined as when it is not inclined.
  Therefore, when the assembly type transmission V-belt moves from the pulley linear region to the pulley winding region and also from the pulley winding region to the pulley linear region, the endless band may be displaced relative to the band winding surface. In addition, it is possible to surely avoid the conventional problem that the endless band slips on the band winding surface and causes friction loss at the time of transition to these regions.
  Further, in the pulley winding area, the positional deviation amount between the band winding surface in the height direction of the V-shaped block and the pulley V groove contact center point of the V-shaped block becomes 0, and this positional deviation amount is set as the arm length. The rotational moment does not act on the V-shaped block from the endless band, and the conventional problem that the V-shaped block is deformed or tilted to reduce the transmission efficiency can be solved.
[0025]
  In the second invention,Since the locking edge is formed in two stages with different levels in the height direction of the V-shaped block, even when the pulley winding diameter of the assembly type transmission V-belt changes from large diameter, medium diameter, and small diameter, it is adjacent to this The relative inclination position between the V-shaped blocks can be changed, and the band misalignment amount between the pulleys accompanying the gear change can be suppressed to be small.
[0026]
  In the third invention,The locking edge is formed in two stages having different levels in the height direction of the V-shaped block, and the band winding in the band assembling groove where the lower locking edge of these locking edges and the inner peripheral surface of the endless band are in contact with each other Since the surface is positioned at the same level in the height direction of the V-shaped block,
When adjacent V-shaped blocks incline around the pulley winding arc in the pulley winding area and incline with each other with the rocking edge as the rotation pitch, this inclination is caused around the band winding surface. The relative position of the winding surface in the longitudinal direction of the band is kept the same when the V-shaped block is inclined as when it is not inclined.
Therefore, when the assembly-type transmission V-belt moves from the linear area between pulleys to the pulley winding area, or when it moves from the pulley winding area to the linear area between pulleys, The endless band is not displaced relative to the band wrapping surface, and the conventional problem that the endless band slips on the band wrapping surface and causes friction loss during transition to these areas is surely avoided. be able to.
  Also,Since the locking edge is formed in two stages with different levels in the height direction of the V-shaped block, even when the pulley winding diameter of the assembly type transmission V-belt changes from large diameter, medium diameter, and small diameter, it is adjacent to this The relative inclination position between the V-shaped blocks can be changed, and the band misalignment amount between the pulleys accompanying the gear change can be suppressed to be small.
[0027]
  In the third aspect of the present invention, the lower locking edge and the band winding surface of the two locking edges are arranged in the height direction of the V-shaped block.On the same levelSince it is positioned, the following effects can be obtained.
  In other words, the V-shaped blocks are inclined with respect to each other via the lower locking edge when the pulley winding diameter of the assembly type transmission V-belt is small. At this time, the inclination between the V-shaped blocks is the largest,The present inventionThe problem that is going to be solved becomes the most remarkable.
  By the way, in the third invention, the lower rocking edge and the band winding surface are arranged in the height direction of the V-shaped block.Same levelTherefore, the most prominent problem can be solved, and although the small problem when the V-shaped blocks are inclined with respect to each other via the upper locking edge cannot be solved, two locking edges are provided for the above purpose. MadeEffect in caseCan be achieved most efficiently.
[0028]
In the fourth invention, the band assembling groove is formed symmetrically on both sides in the width direction of the V-shaped block, and the locking edge is formed at the neck between these band assembling grooves.
The contact area between the endless band and the V-shaped block is doubled to increase the transmission capacity between them, and the effects of the first to third inventions can be achieved.
[0029]
In the fifth invention, the band assembling groove is formed in the center in the width direction of the V-shaped block, and the locking edges are formed on both sides of the band assembling groove.
The mutual inclination of the V-shaped block is performed via the locking edges on both sides in the width direction of the V-shaped block, and the mutual inclination between the adjacent V-shaped blocks necessary to follow the pulley winding arc in the pulley winding region. Can be performed stably.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 show an assembled transmission V belt according to an embodiment of the present invention. FIG. 1 is a detailed front view of a V-shaped block 20, FIG. 2 is a side view of the same, and FIG. FIG. 4 is an assembled state diagram of the transmission V belt assembled with the endless band 25 as shown in FIGS. 3 and 4, and FIG. 4 shows the assembly type transmission V belt between the linear area between pulleys and the pulley winding area. It is explanatory drawing shown in a boundary area | region.
[0031]
As clearly shown in FIG. 1 and FIG. 2, the V-shaped block 20 sets the base portion 4 in a V shape by setting inclined end surfaces 22 to be brought into frictional contact with both side walls W of the pulley V groove in the base portion 21.
A hook portion 23 is arranged in parallel above the V-shaped base 4, and the V-shaped base portion 4 and the hook portion 23 are integrated with each other by a neck portion 24 at the center in the width direction of the V-shaped block 20. Band assembling grooves 16 are defined on both sides of the shape block 20 in the width direction.
Accordingly, the band assembling groove 26 penetrates in the thickness direction of the V-shaped block 20 and opens into the inclined end face 22. From this opening, the endless band 25 is inserted into the band assembling groove 26 as shown in FIGS. It can be inserted in the bandwidth direction.
Thus, when the band assembly grooves 16 are set on both sides in the width direction of the V-shaped block 20 and the endless band 25 is inserted in each, the transmission capacity between the V-shaped block 20 and the endless band 25 is doubled. can do.
The endless band 25 is preferably formed by laminating a plurality of band elements 25a.
[0032]
  The hook portion 23 of the V-shaped block 20 is provided with a protrusion 30 at the center on one side in the belt traveling direction, and a hole 31 through which the protrusion 30 of the adjacent V-shaped block 20 penetrates is formed at the center of the other side of the belt traveling direction. The protrusion 30 and the hole 31 restrict relative displacement in the width direction between the adjacent V-shaped blocks 20.
  A locking edge 27 extending in the width direction of the V-shaped block 20 is set on one side surface in the belt running direction of the neck portion 24 connecting the base portion 21 and the hook portion 23. The band winding surface 26a in the band assembly groove 26 with which the inner peripheral surface of the laminated endless band 25 contacts,Same levelTo place.
[0033]
Starting from the rocking edge 27, one side surface of the neck 24 and the base 21 in the belt running direction is formed on an inclined surface 28 having a predetermined inclination angle in which the plate thickness (thickness) decreases toward the bottom side of the base 21. .
Further, the boundary portion between the base portion 21 and the band assembling groove 26 is cut into a flat shape so that a corner portion on one side surface in the belt traveling direction does not hit the adjacent V-shaped block 20 to form a flat surface 29.
[0034]
  As clearly shown in FIG. 1, the hook portion 23 is sufficiently long so that its both end surfaces 23 a are in frictional contact with both side walls W of the pulley V groove, so that both end surfaces 23 a of the hook portion 23 together with the inclined end surfaces 22 of the base portion 4. An inclined end face of the V-shaped block 20 that is in frictional contact with both side walls W of the pulley V groove is formed.
  At this time, the bisector (indicated by H1) in the height direction of the V-shaped block in the frictional contact region of the V-shaped block inclined end faces 22 and 23a with respect to both side walls W of the pulley V-shaped groove, that is, both sides of the pulley V-shaped groove. The friction contact center point 32 of the V-shaped block inclined end surfaces 22 and 23a with respect to the wall W is in contact with the rocking edge 27 and the band winding surface 26a in the height direction of the V-shaped block 20.Same levelTo be.
[0035]
Such a V-shaped block 20 is continuously arranged in an endless manner so as to form a V-belt as a set of a large number of V-shaped blocks 20 as shown in FIG. A transmission V-belt is assembled by spanning the endless band 25 on the band winding surface 26a in the band assembly groove 26 provided penetrating in the thickness direction of the block 20.
[0036]
Such an assembly-type transmission V-belt is put into practical use by, for example, being wound between a drive pulley and a driven pulley (not shown). In a continuously variable transmission, these pulleys are configured such that the pulley V-groove width is variable. As a result, the winding radius of the assembly-type transmission V-belt with respect to both pulleys can be continuously changed, and continuously variable transmission can be performed.
In the practical use, when the assembly-type transmission V belt is in the pulley winding region as shown in FIG. 3, the adjacent V-shaped blocks 20 can be relatively inclined with the locking edge 27 as a rotation pitch. Thus, the assembly-type transmission V-belt can travel following the pulley winding arc as shown in FIG.
[0037]
  By the way, in the present embodiment, the locking edge 27 and the band winding surface 26 a in the band assembly groove 26 are arranged in the height direction of the V-shaped block 20.Same levelAs shown in FIG. 4 showing the state when the assembled transmission V-belt enters and exits the pulley, the V-shaped block 20 is relatively displaced in the belt running direction at the band winding surface 26a. Does not occur.
  That is, when the assembly-type transmission V-belt is in the linear region between the pulleys, the adjacent V-shaped blocks 20 are in close contact with each other in the region of the band winding surface 26a. When the assembly-type transmission V-belt is in the pulley winding area, the adjacent V-shaped blocks 20 are inclined to each other (the inclination angle is indicated by θ) with the rocking edge 27 as a rotational pitch so as to follow the pulley winding arc.
  However, as in the present embodiment, the locking edge 27 and the band winding surface 26a areSame levelEven if the adjacent V-shaped blocks 20 in the pulley winding area are inclined (θ) with the locking edge 27 as the rotation pitch, the adjacent V-shaped blocks 20 are adjacent to each other because the fulcrum of the inclination is the location of the locking edge 27. The V-shaped blocks 20 are kept in close contact with each other in the region of the band winding surface 26a.
[0038]
For this reason, the V-shaped block 20 does not cause any relative displacement in the belt traveling direction in any traveling region at the band winding surface 26a, and the assembled transmission V-belt winds from the linear region between the pulleys. The relative position between the laminated endless band 25 and the band winding surface 26a does not change when moving to the region, or conversely, when the assembly type transmission V belt moves from the pulley winding region to the linear region between the pulleys, The conventional problem that the endless band 25 slides on the band winding surface 26a to cause friction loss can be solved.
[0039]
On the other hand, in the linear region between the pulleys, the V-shaped block 20 travels with the capital 24 above the locking edge 27 and the surface of the hook portion 23 (both surfaces in the V-shaped block alignment direction) contacting each other.
In this case, since the main surface cannot be formed on the base portion 21 because the locking edge 27 is formed on the neck portion 24, the area of the main surface can be increased by forming the hook portion 23 large, and the area of the main surface is reduced. Therefore, there is no problem that the straight running becomes unstable.
[0040]
  In addition, in the present embodiment, as shown in FIG. 1, the frictional contact center point 32 of the V-shaped block inclined end surfaces 22 and 23 a with respect to both side walls W of the pulley V groove, the locking edge 27 and the band winding surface 26 a, In the height direction of the V-shaped block 20Same levelBecause
  In the pulley winding area, the amount of positional deviation between the band winding surface 26a in the height direction of the V-shaped block 20 and the pulley V groove contact center point 32 of the V-shaped block 20 becomes zero, and this positional deviation is determined by the arm length. The rotational moment is not applied to the V-shaped block 20 from the endless band 25, and the above-mentioned conventional problem that the V-shaped block is deformed or tilted to reduce the transmission efficiency is also solved. be able to.
[0041]
5 and 6 show a V-shaped block 40 of an assembly type transmission V-belt according to another embodiment of the present invention, in which the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.
In the present embodiment, the locking edges 41 and 42 formed in two stages so that the level is different in the height direction of the V-shaped block on one side surface in the belt running direction of the neck portion 24 connecting the base portion 21 and the hook portion 23. As a result, even when the pulley winding diameter of the assembly type transmission V-belt is changed to a large diameter, a medium diameter, and a small diameter, the relative inclination position between the adjacent V-shaped blocks 40 can be changed accordingly. By doing so, the substantial circumference of the band can be changed in accordance with the pulley winding diameter, so that the amount of band misalignment between the pulleys associated with gear shifting can be suppressed small.
[0042]
  Of these locking edges 41, 42, the locking edge 41 at the lower stage in the height direction of the V-shaped block is connected to the band winding surface 26 a in the band assembly groove 26 in the height direction of the V-shaped block 40.Same levelTo place.
  Here, when setting the locking edges 41, 42, first, the thickness (wall thickness) of the one side surface of the neck portion 24 in the belt running direction from the upper locking edge 42 to the lower locking edge 41 is directed toward the base 21. It is formed on the inclined surface 47 having a predetermined inclination angle that decreases, and then the one side surface in the belt running direction of the neck portion 24 and the base portion 21 in the region below the lower rocking edge 41 is further increased toward the bottom side of the base portion 21. It is formed on the inclined surface 48 having a predetermined inclination angle where (thickness) decreases.
[0043]
When such a V-shaped block 40 is used, as in the above-described embodiment, a large number of V-shaped blocks 40 are arranged as a set and are continuously arranged in an endless manner to form a V-belt. A transmission V-belt is assembled by spanning a band-free surface similar to the laminated endless band 25 in FIG. 3 on a band winding surface 26a in a band assembling groove 26 provided penetrating in the thickness direction of 40.
[0044]
Such an assembly-type transmission V-belt is put into practical use by, for example, being wound between a drive pulley and a driven pulley (not shown). In a continuously variable transmission, these pulleys are configured such that the pulley V-groove width is variable. As a result, the winding radius of the assembly-type transmission V-belt with respect to both pulleys can be continuously changed, and continuously variable transmission can be performed.
During the practical use, when the assembly type transmission V belt is in the pulley winding region, the adjacent V-shaped blocks 40 are relatively inclined with the locking edge 41 or 42 as the rotation pitch depending on the pulley winding arc diameter. Thus, the assembly-type transmission V-belt can travel following the pulley winding arc.
[0045]
FIG. 7 shows an arrangement state of the V-shaped block 40 when none of the two rocking edges 41 and 42 is set at the same level as the band winding surface 26a in the height direction of the V-shaped block 40 for convenience.
As is apparent from this figure, when one pulley winding diameter is large, the other pulley winding diameter is small, and the large diameter side is inclined with the upper locking edge 42 as a fulcrum between the V-shaped blocks 40. (Inclination angle θ₁On the small diameter side, the lower rocking edge 41 is used as a fulcrum for tilting (the tilt angle is θ₂).
[0046]
  Here, as shown in FIG. 7, the distance between the upper locking edge 42 and the band winding surface 26a is represented by h.₁The distance between the lower locking edge 41 and the band winding surface 26a is h.₂And the distance between the locking edges 41 and 42 is h₀(= H₁+ H₂) And the inclination angle of the inclined surface 47 between the rocking edges 41 and 42 is δ₁Then, when the band wrapping surface 26a is above the upper locking edge 42 as in the prior art, the amount of change in the gap on the band wrapping surface 26a between adjacent blocks 40 is small on the pulley large diameter side. However, it is large on the small pulley side, and at least h₀× tanδ₁become.
  In contrast, as in the above embodiment, the band winding surface 26a and the lower locking edge 41 areSame levelThe amount of change in the gap at the position of the band winding surface 26a between the adjacent blocks 40 is at most h on the pulley large diameter side.₀× tanδ₁H on the small pulley side₀× tanδ₁Is a constant value.
[0047]
  That is, the smaller pulley side is the inclination angle θ between V-shaped blocks₂In the present embodiment, as described above, the lower locking edge 41 that provides the inclined position on the pulley small-diameter side is provided in the height direction of the V-shaped block 40. In the band winding surface 26a andSame levelThus, the gap between the V-shaped blocks 40 at the band winding surface 26a in the pulley winding area on the small-diameter side is kept at 0 as in the linear area between the pulleys. The band is prevented from slipping on the band winding surface 26a, and the friction loss can be accurately reduced.
[0048]
In this embodiment, when winding a large-diameter pulley in which the V-shaped block 40 is inclined with respect to each other via the upper locking edge 42, the gap between the V-shaped blocks 40 at the band winding surface 26a is not zero. Although the problem to be solved by the present invention cannot be solved in the large-diameter pulley winding region, the inclination angle θ between the V-shaped blocks is large in the large-diameter pulley winding region.₁Therefore, even if the above-mentioned gap is generated, it is extremely small, so that there is no problem.
Therefore, in the present embodiment, the problem to be solved by the present invention can be achieved most efficiently when the locking edge is formed in two stages for the above purpose.
[0049]
  In this embodiment as well, as shown in FIG. 5, the frictional contact center point 32 of the V-shaped block inclined end surfaces 22 and 23a with respect to both side walls W of the pulley V groove, the lower locking edge 41 and the band winding surface 26a are provided. In the height direction of the V-shaped block 40Same levelAnd place it in
  As a result, in the pulley winding region, the rotational moment does not act on the V-shaped block 40 from the endless band wound on the band winding surface 26a, and the V-shaped block is deformed or inclined to reduce the transmission efficiency. The conventional problem of doing so can be solved.
[0050]
8 and 9 show a V-shaped block 60 of an assembly type transmission V-belt according to still another embodiment of the present invention, in which the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.
In the present embodiment, a band assembling groove 81 for the laminated endless band 25 is formed in the center of the V-shaped block 60 in the width direction.
For this reason, the hook portion 23 is connected to the base portion 21 by the neck portion 86 at one end in the width direction of the V-shaped block 60 to define a band assembling groove 81, and the band assembling groove 81 at the other end in the width direction of the V-shaped block 60. Is opened to the outside (82), and the endless band 25 can be inserted into the band assembling groove 81 from the opening 82 in the band width direction.
[0051]
  The V-shaped block 60 is further provided with a protrusion 84 that projects from the base portion 21 into the opening 82 of the band mounting groove 81, and the width of the V-shaped block 60 is formed on one side surface of the protrusion 84 and the hook portion 23 in the belt running direction. An extending locking edge 61 is set, and this locking edge 61 is arranged in the height direction of the V-shaped block 60 with the band winding surface 81a in the band assembling groove 81 with which the inner peripheral surface of the laminated endless band 25 contacts.Same levelTo place.
[0052]
  Also in this embodiment, as clearly shown in FIG. 8, the hook portion 23 is sufficiently long so that both end surfaces 23a thereof are in frictional contact with both side walls W of the pulley V groove. The inclined end surface of the V-shaped block 60 that frictionally contacts the both side walls W of the pulley V groove together with the inclined end surface 22 of the base portion 4 is configured.
  At this time, the bisection point in the height direction of the V-shaped block in the frictional contact region of the V-shaped block inclined end faces 22 and 23a with respect to both side walls W of the pulley V groove (H₁In other words, the frictional contact center point 32 of the V-shaped block inclined end faces 22 and 23a with respect to the both side walls W of the pulley V-groove is in contact with the locking edge 61 and the band winding surface 81a in the height direction of the V-shaped block 60.Same levelTo be.
[0053]
The V-shaped block 60 is also arranged in a non-terminal shape so as to form a V-belt as a set in the same manner as in the above-described embodiments, and is further disposed in the band assembling groove 81 from the opening 82. The transmission V belt is assembled by inserting the end band 25 in the band width direction and spanning the endless band 25 on the band winding surface 81a.
[0054]
  When such an assembly-type transmission V-belt is in the pulley winding region, adjacent V-shaped blocks 60 can be inclined relative to each other with the above-mentioned locking edge 61 as a rotational pitch, and thus follow the pulley winding arc. can do.
  At this time, since the locking edges 61 exist on both sides in the width direction of the V-shaped block 60, the above-described inclination between the adjacent V-shaped blocks 60 with the locking edge 61 as the rotation pitch can be stably performed.
  By the way, in the present embodiment, the locking edge 61 and the band winding surface 81a in the band assembly groove 81 are arranged in the height direction of the V-shaped block 60.Same levelTherefore, even when the assembly-type transmission V-belt moves in and out of the pulley, the V-shaped blocks 60 are kept in close contact with each other at the band winding surface 81a, and no relative displacement occurs in the belt running direction.
[0055]
For this reason, when the assembly-type transmission V-belt moves from the pulley linear region to the pulley winding region, or conversely, when the assembly-type transmission V-belt moves from the pulley winding region to the pulley linear region, the laminated endless band 25 and the band winding The relative position with respect to the hooking surface 81a does not change, and the conventional problem that the endless band 25 slides on the band winding surface 81a and friction loss occurs can be solved.
[0056]
  In addition, in the present embodiment, as shown in FIG. 8, the frictional contact center point 32 of the V-shaped block inclined end surfaces 22 and 23a with respect to both side walls W of the pulley V groove, the locking edge 61 and the band winding surface 81a, In the height direction of the V-shaped block 60Same levelBecause
  In the pulley winding region, the rotational moment does not act on the V-shaped block 60 from the endless band 25 wound on the band winding surface 81a, and the V-shaped block 60 is deformed or inclined to reduce the transmission efficiency. Conventional problems can also be solved.
[0057]
  10 and 11 show a V-shaped block 70 of an assembly type transmission V-belt according to still another embodiment of the present invention, in which the same parts as in FIGS. 1 and 2 and FIGS. 8 and 9 are shown. The same reference numerals are used.
  In this embodiment, in addition to the locking edge 61 provided in the embodiment shown in FIGS. 8 and 9, the protrusion 84 and the hook portion 23 extend in the width direction of the V-shaped block 70 on the same side as the belt running direction. An existing locking edge 71 is set.
  As described above, the locking edge 71 includes the band winding surface 81a in the band assembly groove 81 andSame levelThe V-shaped block 70 is disposed above the locking edge 61 in parallel with the locking edge 61 in the height direction.
[0058]
When setting the two-stage locking edges 61, 71, the protrusion 84 and the neck 86 on the same side in the belt traveling direction from the upper-stage locking edge 71 to the lower-stage rocking edge 61 have a plate thickness (wall thickness) toward the base 21. (Thickness) is formed on the inclined surface 72 having a predetermined inclination angle, and then the same side surface in the belt running direction of the base portion 21 in the region below the lower rocking edge 61 is further increased in thickness toward the bottom side of the base portion 21 (see FIG. It is formed on the inclined surface 28 having a predetermined inclination angle where the thickness is reduced.
[0059]
The assembly-type transmission V-belt using the V-shaped block 70 having the two-stage locking edges 61 and 71 set as described above also has the two-stage locking edges 41 and 42 as shown in FIGS. The same effect as that obtained when the V-shaped block 40 is used can be obtained.
However, since the locking edges 61 and 71 exist on both sides of the V-shaped block 70 in the width direction, the relative inclination between the adjacent V-shaped blocks 70 generated around the locking edges 61 and 71 in the pulley winding region is stably performed. Is possible.
[0060]
  In this embodiment as well, as shown in FIG. 10, the frictional contact center point 32 of the V-shaped block inclined end surfaces 22 and 23a with respect to both side walls W of the pulley V groove, the lower locking edge 61 and the band winding surface 81a are provided. In the height direction of the V-shaped block 70Same levelAnd place it in
  As a result, in the pulley winding region, the rotational moment does not act on the V-shaped block 70 from the endless band 25 wound on the band winding surface 81a, and the V-shaped block is deformed or inclined to improve the transmission efficiency. The conventional problem of lowering can be solved.
[Brief description of the drawings]
FIG. 1 is a front view showing a V-shaped block of an assembly-type transmission V-belt according to an embodiment of the present invention in a state where it is positioned in a pulley V-groove.
FIG. 2 is a side view of the V-shaped block.
FIG. 3 is a partial side view of the assembly-type transmission V-belt according to the embodiment.
FIG. 4 is a partial side view showing the assembly-type transmission V-belt in a state where it is in a boundary portion between a pulley winding region and a linear region between pulleys.
FIG. 5 is a front view showing a V-shaped block of an assembly-type transmission V-belt according to another embodiment of the present invention in a state where it is positioned in a pulley V-groove.
FIG. 6 is a side view of the V-shaped block.
FIG. 7 is an explanatory diagram of an inclined state of a V-shaped block showing an assembly-type transmission V-belt made of a conventional V-shaped block having two stages of locking edges for each traveling region.
FIG. 8 is a front view showing a V-shaped block of an assembly type transmission V-belt according to still another embodiment of the present invention in a state where the V-shaped block is positioned in a pulley V groove.
FIG. 9 is a side view of the V-shaped block.
FIG. 10 is a front view showing a V-shaped block of an assembly-type transmission V-belt according to still another embodiment of the present invention in a state where the V-shaped block is positioned in a pulley V groove.
FIG. 11 is a side view of the V-shaped block.
FIG. 12 is a front view of a V-shaped block constituting a conventional assembly type transmission V-belt.
FIG. 13 is a side view showing the assembly type transmission V-belt in a state where a large-diameter pulley is wound.
FIG. 14 is a side view showing the assembly-type transmission V-belt with a small-diameter pulley wound thereon.
FIG. 15 is a partial side view showing the assembly-type transmission V-belt in a state where it is at a boundary portion between a pulley winding region and a linear region between pulleys.
[Explanation of symbols]
W Pulley V groove side wall
20 V block
21 base
  22 Base inclined end face
  23 Hook part
  23a Inclined end face of hook
  24 neck
  25 Laminated endless band
  26 Band mounting groove
  26a Band surface
  27 Rocking edge
  28 Inclined surface
  29 Step surface
  32 V-shaped block pulley V groove side wall contact center point
  40 V block
  41 Lower locking edge
  42 Upper locking edge
  47 Inclined surface
  48 Inclined surface
60 V block
61 Locking edge (lower locking edge)
  70 V-shaped block
71 Upper locking edge
72 Inclined surface
  81 Band mounting groove
  81a Band surface
82 Band assembly groove opening
84 protrusion
  86 neck

Claims (5)

A large number of V-shaped blocks formed in a V shape with inclined end faces that make frictional contact with both side walls of the pulley V-groove are continuously arranged in an endless manner to form a V-belt, and the thickness of these V-shaped blocks An endless band is wound around a band assembly groove provided in a direction extending in the direction and assembled into a V-belt shape, and is extended in the width direction of the V-shaped block on at least one of the opposing surfaces of adjacent V-shaped blocks. In the assembly type transmission V belt which can follow the pulley winding arc by making the adjacent V-shaped blocks tiltable relative to each other with the rocking edge formed to be present as the rotation pitch,
The band winding surface in the band assembling groove with which the inner peripheral surface of the endless band contacts, and the locking edge of the V-shaped block are arranged on both side walls of the pulley V-groove in the height direction of the V-shaped block. An assembly-type transmission V-belt characterized by being positioned at the same level as the frictional contact center point of the V-shaped block inclined end face with respect to . In Claim 1, the said rocking edge is formed in two steps from which a level differs in the height direction of a V-shaped block, The rocking edge of the lower stage among these rocking edges, An assembly-type transmission V-belt characterized in that the band winding surface in the band assembly groove is positioned at the same level in the height direction of the V-shaped block . A large number of V-shaped blocks formed in a V shape with inclined end faces that make frictional contact with both side walls of the pulley V-groove are continuously arranged in an endless manner to form a V-belt, and the thickness of these V-shaped blocks An endless band is wound around a band assembly groove provided in a direction extending in the direction and assembled into a V-belt shape, and is extended in the width direction of the V-shaped block on at least one of the opposing surfaces of adjacent V-shaped blocks. In the assembly type transmission V belt which can follow the pulley winding arc by making the adjacent V-shaped blocks tiltable relative to each other with the rocking edge formed to be present as the rotation pitch,
The locking edge is formed in two stages having different levels in the height direction of the V-shaped block, and the lower edge of the locking edge and the inner peripheral surface of the endless band are in contact with each other in the band assembly groove. An assembly type transmission V-belt characterized in that the band winding surface is positioned at the same level in the height direction of the V-shaped block.   The band assembly groove according to any one of claims 1 to 3, wherein the band assembly groove is formed symmetrically on both sides in the width direction of the V-shaped block, and the rocking edge is formed at a neck portion between the band assembly grooves. Assembling type transmission V belt.   The assembly type according to any one of claims 1 to 3, wherein the band assembling groove is formed in the center in the width direction of the V-shaped block, and the locking edges are formed on both sides of the band assembling groove. Transmission V belt.

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