JP2001311453A - Heavy load transmission belt and its block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heavy load transmission belt of tension transmission type and a block thereof which retains enough strength even under high speed rotation by reducing a block weight and satisfies requirements demanded for the heavy load transmission belt at higher level. SOLUTION: In the heavy load transmission belt 1 comprising tension strips 3a, 3b and a plurality of blocks 2 arranged longitudinally along the tension strip 3a, 3b with predetermined pitch, the block 2 is made of a material to which a thermoplastic resin, a fibrous reinforcement, and a whisker reinforcement are added as main components, wherein it is so constituted that, for the thermoplastic resin of 100 pts.wt., the fibrous reinforcement is in an amount of 20-100 pts.wt. and the whisker reinforcement is in an amount of 5-60 pts.wt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-load transmission belt in which blocks are fixed at a predetermined pitch along a longitudinal direction of a tension band, and to the blocks.

[0002]

2. Description of the Related Art A belt used in a belt-type continuously variable transmission is used by being wound around a speed change pulley that changes the effective diameter of the pulley by changing the V-groove width of the pulley and thereby adjusts the gear ratio. Since the lateral pressure from the pulley increases, the belt must be able to withstand the large lateral pressure. In addition to the use of continuously variable transmission, it is necessary to use a belt capable of withstanding a high load especially for a high load transmission in which the life of a normal rubber belt is too short.

[0003] Among such belts, there is a tension transmission type high load transmission belt in which a block is fixed to a center belt to increase the strength in the width direction of the belt. There is a center belt in which wires are embedded in an elastomer such as rubber, and a block made of an elastomer that is relatively harder than the elastomer used for the center belt is fastened and fixed using a fastening material such as bolts and rivets. .

[0004] The required quality of such a block of a tension transmission type high load transmission belt is that bending friction fatigue, wear resistance, and heat resistance are required because the purpose is to transmit a high load in friction transmission as described above. It is necessary to have properties such as rigidity and impact resistance in a well-balanced manner. It is also important to prevent the pulley from being worn.

As a high-load transmission belt satisfying these requirements, for example, there is a belt disclosed in JP-A-63-34342. This belt uses a double-structured block in which the block and the pulley are in contact with each other using a resin molding material in which a rubber component is added to a phenolic resin component and coated with an insert material made of metal or the like. It is.

Japanese Patent Publication No. 7-110900 discloses that a phenolic resin is blended with an acrylonitrile-butadiene rubber as a matrix and a fibrous filling ratio of 25 to 60 parts by weight including two fibers of carbon fiber and aramid fiber. , The carbon fiber has an onion structure and the crystal layer thickness is 25
There is disclosed a high-load transmission belt using a block using a phenolic resin having a thickness of up to 200 °.

[0007]

In recent years, diversification of needs has led to a demand for a high-load transmission belt which has a high load, but has a slightly lower load than the conventional one and can be rotated at a high speed. It has become to.

For this reason, for example, Japanese Patent Application Laid-Open No. 63-34342
Since the belt disclosed in Japanese Patent Application Laid-Open No. H10-20712 uses an aluminum alloy or the like as an insert material, when rotated at high speed, a large centrifugal force is applied due to its weight, and a large tension acts on the belt, thereby causing the belt to rotate. The problem of premature breakage came to occur.

[0009] Further, the amount of heat generated between the pulley and the block increases due to the high speed rotation.
In a block containing a phenolic resin as a main component as disclosed in Japanese Patent No. 10900, the phenolic resin may have poor impact resistance, and the belt may be damaged. In addition, the anisotropy of characteristics such as a friction coefficient, which is considered to be caused by the orientation of carbon fibers, also occurs. Was something.

Therefore, the present invention has been made in view of the above-mentioned problems, and has been demanded as a high-load transmission belt which has sufficient strength even when the block is lightened and rotates at a high speed. It is an object of the present invention to provide a tension-driven high-load transmission belt and its block capable of satisfying a certain condition at a high level.

[0011]

According to a first aspect of the present invention, there is provided a high-load transmission belt comprising a tension band and a plurality of belts provided at a predetermined pitch along a longitudinal direction of the tension band. High load transmission belt consisting of
The block is mainly composed of a thermoplastic resin and a fibrous reinforcing material, and the resin is used in a block in which the fibrous reinforcing material is 20 to 100 parts by mass with respect to 100 parts by mass of the thermoplastic resin. By adding a fibrous reinforcing material as a reinforcing material and improving the strength, the weight of the block can be reduced, and the acting centrifugal force can be reduced.

A high load transmission belt according to a second aspect of the present invention is a high load transmission belt comprising a tension band and a plurality of blocks provided at a predetermined pitch along a longitudinal direction of the tension band. A thermoplastic resin, a fibrous reinforcing material, and a whisker-like reinforcing material are used as main components, and the fibrous reinforcing material is 20 parts by mass with respect to 100 parts by mass of the thermoplastic resin.
100 parts by mass, and the whisker-like reinforcing material is 5 to 60 parts by mass. By using a resin for the block and adding a fibrous reinforcing material and a whisker-like reinforcing material as reinforcing materials to improve the strength, it is possible to reduce the weight of the block and reduce the centrifugal force that acts. Can be smaller.

Further, in the high-load transmission belt according to the third aspect, the thermoplastic resin according to the first or second aspect may be such that the thermoplastic resin is 4.
6 Nylon, polyphenylene sulfide, polyetheretherketone, polyethersulfone, or polyamideimide. Either 4.6 nylon, polyphenylene sulfide, polyetheretherketone, polyethersulfone, or polyamideimide is used as the thermoplastic resin. Blocks can be easily formed by injection molding using the thermoplastic resin. In particular, by using 4.6 nylon, a block having high strength can be produced even by injection molding.

Further, in the high-load transmission belt according to claim 4, the fibrous reinforcing member according to claim 1 or 2 is a carbon fiber alone or a combination of carbon fiber and aramid fiber. By adding carbon fiber, hardness can be increased and excellent abrasion resistance can be obtained. In addition, by combining the carbon fiber and the aramid fiber, the hardness, which is the property of the carbon fiber, and the toughness, which is the property of the aramid fiber, are improved. it can.

In the high-load transmission belt according to a fifth aspect, the whisker-like reinforcing member in the second aspect is a zinc oxide whisker. Since the zinc oxide whisker has a high specific gravity and a high rigidity, the vibration when the block enters the pulley can be reduced, and the belt noise can be reduced. Also,
The addition of zinc oxide whiskers stabilizes the coefficient of friction, thus further improving wear resistance.

According to a sixth aspect of the present invention, in the high-load transmission belt, the zinc oxide whisker in the fifth aspect has a three-dimensional shape. Since the zinc oxide whisker has a three-dimensional tetrapod shape, the orientation of the carbon fiber is reduced, the warpage during molding and the anisotropy of molding shrinkage are improved, and the dimensional accuracy is improved.

The high load transmission belt block according to claim 7 is a plurality of blocks provided at a predetermined pitch along a longitudinal direction of a tension band of the high load transmission belt, the block comprising a thermoplastic resin; It consists of a fibrous reinforcing material. Since the block has such a configuration, a high-load transmission belt having excellent wear resistance and impact resistance can be formed.

[0018] The high load transmission belt block according to claim 8 is a plurality of blocks provided at a predetermined pitch along a longitudinal direction of a tension band of the high load transmission belt, and comprises a thermoplastic resin; It consists of a fibrous reinforcing material and a whisker-like reinforcing material. Since the block has such a configuration, a high-load transmission belt having excellent wear resistance and impact resistance can be formed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a high-load transmission belt 1 according to the present invention.
FIG. 3 is a schematic perspective view showing an example of FIG. The high-load transmission belt 1 of the present invention has two tension bands 3a, 3b of the same width, each having a core wire 5 spirally embedded in an elastomer 4, and a predetermined pitch on the upper surface of the tension bands 3a, 3b. And a plurality of blocks 2 fitted and locked and fixed in the concave portion 6 formed by the above. Both sides 2a, 2 of this block 2
b is an inclined surface that engages with the V-groove of the pulley, receives power from the driven pulley, pulls the tension bands 3a, 3b locked and fixed, and drives the power of the driving pulley. To the driven pulley.

As shown in FIG. 1, the block 2 comprises a pair of side pillars 1 extending upward from both ends of the beam portion 11.
Lock portions 8, 9 extending from the upper ends of the side pillars 12, 13 toward the center of the block 2 are provided so as to face each other. The beam portion 11, the side pillars 12, 13 and the lock portions 8, 9 form a fitting groove 10 in which the tension bands 3a, 3b fit. The tension bands 3a, 3b are inserted into the fitting grooves 10 through the openings between the lock portions 8, 9, and are mounted. Further, on the fitting groove 10 side of the lock portions 8 and 9, a convex portion 7 is provided, and the convex portion 7 is
Recesses 6 provided at predetermined pitches in tension bands 3a, 3b
Fits. As a result, the tension bands 3a and 3b are in a state in which the tension bands 3a and 3b are hard to be removed from the block 2 after being mounted.

The block 2 is mainly composed of a thermoplastic resin and a fibrous reinforcing material, and is formed by adding 20 to 100 parts by mass of the fibrous reinforcing material to 100 parts by mass of the thermoplastic resin. Have been. Or, a thermoplastic resin, a fibrous reinforcing material, and a whisker-like reinforcing material as a main component,
The fibrous reinforcement is 20 to 100 parts by mass, and the whisker-like reinforcement is 5 to 100 parts by mass of the thermoplastic resin.
60 parts by mass. By adopting such a material configuration, rigidity enough to withstand the lateral pressure received when coming into contact with the pulley, while having strength such as toughness,
It is possible to make the block excellent in abrasion resistance and also strong against the heat generated at the time of friction, and the power received from the pulley can be efficiently transmitted to the tension bands 3a and 3b as a tensile force. A high load transmission belt of the type can be constructed.

Here, examples of the thermoplastic resin used for the block 2 include 4.6 nylon, polyphenylene sulfide, polyetheretherketone, polyethersulfone, and polyamideimide. By using these thermoplastic resins, injection molding of the block becomes possible, so that the block can be easily manufactured. Further, among the above thermoplastic resins, it is particularly preferable to use 4.6 nylon. 4.6
Nylon is a crystalline resin, and among these thermoplastic resins, has excellent flexural rigidity and fatigue resistance at high temperatures, and by adding carbon fibers described later as a reinforcing material, these properties are further improved. . Furthermore, a belt using a block made of 4.6 nylon has a small amount of abrasion of the pulley when the belt is run on the pulley, so that it is possible to avoid a cause of running instability due to pulley wear. it can.

As the fibrous reinforcing material serving as the reinforcing material for the thermoplastic resin, it is preferable to use carbon fiber alone or a combination of carbon fiber and aramid fiber. The carbon fiber is preferably used in an amount of 20 to 100 parts by mass based on 100 parts by mass of the above-described thermoplastic resin. When the carbon fiber content is less than 20 parts by mass, the reinforcing property is insufficient, and the strength of the block 2 is insufficient. Also, 10
If it exceeds 0 parts by mass, the hardness increases but the toughness decreases,
Bending fatigue and impact resistance are reduced, and noise generated at the time of contact with the pulley is increased. When a whisker-like reinforcing material described later is added to this carbon fiber, it is possible to obtain a block having sufficient strength or the like with only the carbon fiber as the fibrous reinforcing material. By adding 5 to 50 parts by mass with respect to 100 parts by mass of the thermoplastic resin, the toughness of the block is improved, and the wear resistance and impact resistance can be further improved. In this case, when the added amount of the aramid fiber is less than 5 parts by mass, the effect of adding the aramid fiber is not sufficiently exhibited. If it exceeds 50 parts by mass, kneading becomes difficult.

Here, the carbon fiber used may be any of commonly used rayon type, pitch type and PAN type, but it has good compatibility with the thermoplastic resin.
It is preferable to use PAN-based carbon fiber that is compatible with 6 nylon. The length of the carbon fiber used is preferably 1 to 5 mm. If it is less than 1 mm, the block is not sufficiently reinforced, and if it exceeds 5 mm, kneading with the resin becomes difficult, and the kneading becomes shorter during kneading, which is not preferable.

It is preferable to use zinc oxide whiskers as the whisker-like reinforcing material to be added together with the fibrous reinforcing material. The zinc oxide whisker has a three-dimensional shape in which hands extend in four directions like a tetrapod. This zinc oxide whisker alone is excellent in heat resistance and abrasion resistance, but has a tetrapod-like three-dimensional shape as described above. Is suppressed, and the anisotropy of warpage and molding shrinkage during molding is improved. Further, since the orientation of the carbon fibers can be reduced in this way, the anisotropy in strength such as the toughness and bending stiffness of the block 2 can be reduced, and the friction coefficient is stabilized, so that the wear resistance is improved. I do. In addition, since the zinc oxide whisker has a high specific gravity and a high rigidity, vibration at the time of contact with the pulley can be reduced, and generation of noise can be reduced. When the amount of the zinc oxide whisker is less than 5 parts by mass with respect to 100 parts by mass of the above-described thermoplastic resin, the effect of the addition is not exhibited, and
If it is added in excess of 0 parts by mass, kneading cannot be performed and molding becomes difficult.

In addition to these, molybdenum disulfide,
The lubricity of the block 2 can also be improved by mixing at least one selected from graphite and a fluorine-based resin. Examples of the fluorine-based resin include polytetrafluoroethylene (PTFE), polyfluoroethylene propylene ether (PFPE), tetrafluoroethylene hexafluoropropylene copolymer (PFEP), and polyfluoroalkoxyethylene (PFA). .

As described above, the tension bands 3a and 3b have the concave portions 6 formed at a predetermined pitch on the upper surface, that is, on the surface side of the block 2 which is in contact with the lock portions 8 and 9. The convex portions 7 provided on the lock portions 8 and 9 of the block 2 are fitted into the concave portions 6.

The material used as the elastomer 4 of the tension bands 3a, 3b may be a single material such as chloroprene rubber, natural rubber, nitrile rubber, styrene-butadiene rubber, hydrogenated nitrile rubber, or a rubber or polyurethane appropriately blended with them. Rubber and the like. As the cord 5, a rope selected from polyester fiber, polyamide fiber, aramid fiber, glass fiber, steel wire and the like is used. In addition to the core wire 5 having a rope embedded in a spiral shape, a woven fabric, a knitted fabric, a metal thin plate, or the like made of the above fibers can be used.

In the present embodiment, two tension bands 3
Although the description has been given of the case where the fitting groove 10 is mounted in the fitting groove 10 of the block 2 using a and 3b, a single tension band may be separately used.

Another embodiment is a high-load transmission belt 20 as shown in FIG.

In this case, fitting grooves for inserting the tension bands 21 and 22 are opened on both side surfaces of the block 23, and the tension bands 21 and 22 are fitted into the fitting grooves, respectively. The block used for the high-load transmission belt according to the present invention is not limited to the form shown in the present embodiment.

[0033]

Next, a high-load transmission belt of the present invention was manufactured in the following configuration, and a belt durability test and a noise test were performed to measure the amount of wear on the side surface of the block.

The high load transmission belt used is shown in FIG.
Examples 1 to 3 were obtained by changing the material mixing ratio of the block as shown in Table 1.
3, high load transmission belts of Comparative Examples 1 to 5 and Reference Examples 1 and 2. The tension bands 3a and 3b used were all common, and the core wire 5 used aramid fiber, and the elastomer 4 used chloroprene rubber. The belt pitch width is 18 mm, the pitch circumference is 831 mm, and the block pitch is 3 mm.

(Example 1) 50 parts by mass of carbon fiber and 10 parts by mass of graphite were blended with 100 parts by mass of 4.6 nylon resin, and a block 2 having the shape shown in FIG.
Molded. This block 2 has two tension bands 3 as described above.
a and 3b were fitted to produce a high-load transmission belt for testing.

(Example 2) 100 parts by mass of 4.6 nylon resin, 50 parts by mass of carbon fiber, zinc oxide whisker 1
A high-load transmission belt for testing was produced in the same manner as in Example 1, except that 0 parts by mass and 10 parts by mass of graphite were used.

(Example 3) 30 parts by mass of carbon fiber and 100 parts by mass of 4.6 nylon resin, zinc oxide whisker 2
A high load transmission belt for testing was produced in the same manner as in Example 1, except that 0 parts by mass, 8 parts by mass of aramid fiber, and 10 parts by mass of graphite were used.

(Comparative Example 1) A high load transmission belt for testing was produced in the same manner as in Example 1 except that only 100 parts by mass of 4.6 nylon resin was used.

Comparative Example 2 15 parts by mass of carbon fiber and 100 parts by mass of 4.6 nylon resin, zinc oxide whisker 2
A high-load transmission belt for testing was produced in the same manner as in Example 1, except that 0 parts by mass and 10 parts by mass of graphite were used.

Comparative Example 3 A test was conducted in the same manner as in Example 1 except that 110 parts by mass of carbon fiber, 20 parts by mass of zinc oxide whiskers, and 10 parts by mass of graphite were used with respect to 100 parts by mass of 4.6 nylon resin. A high load transmission belt was produced.

Comparative Example 4 30 parts by mass of carbon fiber and 100 parts by mass of 4.6 nylon resin, zinc oxide whisker 3
Example 1 except that parts by mass and graphite were 10 parts by mass.
A high-load transmission belt for a test was produced in the same manner as described above.

(Comparative Example 5) 30 parts by mass of carbon fiber and 100 parts by mass of 4.6 nylon resin, zinc oxide whisker 6
A high-load transmission belt for testing was produced in the same manner as in Example 1, except that 5 parts by mass and 10 parts by mass of graphite were used.

Reference Example 1 30 parts by mass of carbon fiber and 100 parts by mass of 4.6 nylon resin, zinc oxide whisker 2
A high load transmission belt for testing was produced in the same manner as in Example 1, except that 0 parts by mass, 3 parts by mass of aramid fiber, and 10 parts by mass of graphite were used.

Reference Example 2 30 parts by mass of carbon fiber and 100 parts by mass of 4.6 nylon resin, zinc oxide whisker 2
0 parts by mass, aramid fiber 55 parts by mass, graphite 10
A high-load transmission belt for a test was produced in the same manner as in Example 1 except that the mass parts were used.

As described above, the durability test of the high-load transmission belt includes a driving pulley having a diameter of 60 mm and a driven pulley having a diameter of 120 mm.
The belt is wound around 0 mm, the driving pulley rotation speed is 6000 rpm, and the driven pulley rotation speed is 12000 rpm.
m, the input torque is 29.4N, and the axial load is 1568.
N, the belt was run at an ambient temperature of 90 ° C. during running of the belt.

In the noise test, the belt was run under the same pulley layout as the endurance test under the same conditions of the number of rotations and the axial load, and the total noise level was measured at a predetermined position by a sound level meter.

The amount of wear on the side surface of the block is determined by the belt running 10
The block was removed from the belt after 0 hour, and the measurement was performed using a projector. The above results are summarized in Table 1.

[0048]

[Table 1]

As can be seen from Table 1, the belt of Example 1 has a long running time and a small wear amount. The belt of Example 2 in which 10 parts by mass of zinc oxide whiskers were added to this belt had further improved wear and durability and reduced noise compared to the belt of Example 1. The belt of Example 3 in which 8 parts by mass of aramid fiber was blended with the belt of Example 2 was further improved than the belt of Example 2.
As the endurance time increases, the amount of wear decreases, and the noise is better than others.

The belt of Comparative Example 1 made of only 4.6 nylon resin had low strength and the block was broken in a short time. Further, the belt of Comparative Example 2 having a small amount of carbon fiber is:
Since the strength was not sufficiently increased, the block was compressed and fractured in a short time. Conversely, the belt of Comparative Example 3 containing a large amount of carbon fibers had a high hardness, but the toughness was reduced by that amount, so that the block was cracked after running for 180 hours. In addition, the noise was also loudest.

Comparative Example 4 containing less zinc oxide whiskers
In the belt, the anisotropy due to the orientation of the carbon fibers was not sufficiently improved, so that the durability was poor, the wear resistance was not improved, and the amount of wear was large. On the other hand, the belt of Comparative Example 5 containing many zinc oxide whiskers could not be kneaded, and could not be subjected to a test such as a durability test.

In the same manner as in Example 3, the belts of Reference Examples 1 and 2 containing aramid fibers were the same as the belts of Reference Example 1 containing 3 parts by mass of aramid fibers because the amount of the aramid fibers was small. The effect of blending the aramid fiber was not exhibited, and the characteristics were substantially the same as those of the belt of Example 2.
Further, the belt of Reference Example 2 containing a large amount of aramid fiber as 55 parts by mass could not be kneaded, and a test such as a durability test could not be performed.

[0053]

The present invention is configured as described above.
According to the first or second aspect of the present invention, a resin is used for the block, and a fibrous reinforcing material and a whisker-like reinforcing material are added as the reinforcing material to improve the strength. It is possible to reduce the weight, reduce the centrifugal force that acts, and even when used at high speed rotation, it is possible to efficiently transmit the power of the driving pulley to the driven pulley side, , All are made of blocks mainly composed of resin, so that even during operation, it can be operated oil-free. In addition, since it is made of a resin having sufficient strength even at a high temperature, it has an effect of being sufficiently applicable to automobiles, agricultural equipment, and the like.

According to the third aspect of the present invention, any one of 4.6 nylon, polyphenylene sulfide, polyether ether ketone, polyether sulfone, and polyamide imide, particularly 4.6 nylon is used as the thermoplastic resin. Thereby, injection molding becomes possible, and there is an effect that blocks can be easily manufactured.

According to the fourth aspect of the present invention, since carbon fibers are added, the hardness is increased and the abrasion resistance can be improved. In addition, by combining carbon fibers and aramid fibers, hardness which is a property of carbon fibers,
The toughness, which is a property of the aramid fiber, is improved, and it has an effect of being excellent in abrasion resistance and impact resistance.

According to the fifth aspect of the present invention, since the zinc oxide whisker has a high specific gravity and a high rigidity, the vibration when the block enters the pulley can be reduced, and the belt noise can be reduced. In addition, the addition of zinc oxide whiskers stabilizes the friction coefficient, and thus has the effect of further improving wear resistance.

According to the sixth aspect of the present invention, since the zinc oxide whiskers have a three-dimensional tetrapod shape, the orientation of carbon fibers is reduced, and the anisotropy of warpage and molding shrinkage during molding is reduced. Is improved, and the effect of improving the dimensional accuracy is exhibited.

Further, according to the invention of claim 7 or 8, there is an effect that a block can be formed on which a high-load transmission belt excellent in wear resistance and impact resistance can be formed.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an example of a high-load transmission belt according to the present invention.

FIG. 2 is a schematic perspective view showing another example of the high-load transmission belt according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High load transmission belt 2 Block 3a, 3b Tension band 4 Elastomer 5 Core wire 6 Concave portion 7 Convex portion 8, 9 Lock section 10 Fitting groove 11 Beam section 12, 13 Side pillar 20 High load transmission belt 21 Tension band

Claims (8)

[Claims] 1. A high-load transmission belt comprising a tension band and a plurality of blocks provided at a predetermined pitch along a longitudinal direction of the tension band, wherein the block comprises a thermoplastic resin and a fibrous reinforcing material. As a main component, the thermoplastic resin 100
A high-load transmission belt wherein the fibrous reinforcing material is 20 to 100 parts by mass with respect to parts by mass. 2. A high-load transmission belt comprising a tension band and a plurality of blocks provided at a predetermined pitch along a longitudinal direction of the tension band, wherein the block is made of a thermoplastic resin, a fibrous reinforcing material, With whisker-like reinforcement as the main component,
The fibrous reinforcement is 20 to 100 parts by mass, and the whisker-like reinforcement is 5 to 100 parts by mass of the thermoplastic resin.
High load transmission belt with 60 parts by weight. 3. The thermoplastic resin according to claim 1, wherein the thermoplastic resin is 4.6 nylon,
The high-load power transmission belt according to claim 1, which is any one of polyphenylene sulfide, polyether ether ketone, polyether sulfone, and polyamide imide. 4. The high-load transmission belt according to claim 1, wherein the fibrous reinforcing material is a carbon fiber alone or a combination of carbon fiber and aramid fiber. 5. The high-load transmission belt according to claim 2, wherein the whisker-like reinforcing material is a zinc oxide whisker. 6. The high-load transmission belt according to claim 5, wherein the zinc oxide whiskers have a three-dimensional shape. 7. A high load transmission belt block comprising a plurality of blocks provided at a predetermined pitch along a longitudinal direction of a tension band of the high load transmission belt, the block comprising a thermoplastic resin and a fibrous reinforcing material. . 8. A plurality of blocks provided at a predetermined pitch along a longitudinal direction of a tension band of a high-load power transmission belt, the plurality of blocks comprising a thermoplastic resin, a fibrous reinforcing material, and a whisker-like reinforcing material. High load transmission belt block.