JP2002295597A - Driving device for high load transmission belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device for a high load transmission belt which prevents the problems such as breakdown and noise due to friction and wear and tear by making the friction between a block and a pulley extremely small, and at the same time, is excellent in the transmission efficiency, and can elongate the service lifetime of a belt. SOLUTION: The driving device 1 for the high load transmission belt sets the high load transmission belt comprised by engaging an endless carrier 2 and the block 3 to a V pulley 11, the block 3 is treated with anodized aluminum, a nickel coating containing chromium plating treatment or a low friction material is formed on the surface 13 of the V pulley 11, and at the same time, the V angle of the block and the V pulley is set to 22 deg.-26 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression transmission type high load transmission belt drive device used for a V-belt type continuously variable transmission or the like.

[0002]

2. Description of the Related Art Conventionally, as a compression transmission type high load transmission belt for applications requiring high load transmission such as a continuously variable transmission, a rubber V-belt and Japanese Patent Application Laid-Open No. 55-100443 have been disclosed. Metal belts have been proposed.

However, a rubber V-belt has a maximum surface pressure of about 0.98 MPa even for a high-load one, and if the rubber V-belt is used for a higher torque, the rubber V-belt can withstand a high lateral pressure. And cannot buckle and cannot transmit power sufficiently. In some cases, a failure may occur.

On the other hand, a metal belt as disclosed in Japanese Patent Application Laid-Open No. 55-100443 has excellent lateral pressure resistance, can withstand a considerably high lateral pressure, and does not have to worry about buckling deformation. However, the speed change pulley is also generally made of a metal material such as iron or an aluminum alloy. Therefore, in order to prevent seizure or wear of the contact surface of the metal belt with the pulley, it is necessary to run the belt while continuously supplying oil. In oil, the coefficient of friction is significantly reduced, so that it is necessary to generate a large frictional force on the belt in order to transmit power reliably, and therefore it is necessary to increase the pressure from the pulley on the belt.

[0005]

However, in order to increase the pressure, a large-scale apparatus is required, and the whole apparatus is inevitably large.

Therefore, as a high-load transmission belt that can be operated in an oil-free manner, a metal material such as an aluminum alloy is used as a block material having excellent wear resistance as disclosed in Japanese Patent Application Laid-Open No. 11-44346. Some are coated with resin. This belt is a compression-driven high-load transmission belt that can be operated oil-free and has excellent transmission efficiency at high loads.

However, the abrasion resistance of the resin coated on the surface tends to be deteriorated due to, for example, friction between the blocks or friction between the blocks and the belt. Therefore, it is necessary to periodically inspect the belt. there were.

Accordingly, an object of the present invention is to provide a compression-driven high-load transmission belt drive device that can be operated oil-free and has less wear resistance over a long period of time.

[0009]

According to a first aspect of the present invention, there is provided an endless carrier having:
In a high-load transmission belt drive device in which a high-load transmission belt formed by engaging blocks having a large number of V side surfaces so as to be slidable and in contact with each other runs on at least a pair of V pulleys, The surface of aluminum or aluminum alloy is subjected to alumite treatment impregnated with a low friction material, and the pulley is made of metal and the surface of the metal is formed with a chromium plating treatment or a nickel coating containing a low wear material. And the V angle of the block and the V pulley is 22 ° to 26 °.

An alumite-treated block in which the surface of aluminum or an aluminum alloy is impregnated with a low friction material, so that the abrasion resistance between the blocks or between the block and the endless carrier is improved, and the durability is excellent. And can be. In addition, the overall weight can be reduced. Furthermore, it is easy to manufacture. Furthermore, since the surface of the pulley is also formed with a nickel film containing a low-wear material, the friction between the block and the pulley is extremely small, thereby preventing failure due to frictional wear and extending the life. be able to.

According to the present invention, the low-friction material is a high-load transmission belt driving device made of a fluorine compound.

Since the fluorine compound is impregnated, the difference between the coefficient of static friction and the coefficient of dynamic friction is small, and stick-slip can be minimized.

According to the third aspect, the hardness of the alumite treatment applied to the block is 250 micro Vickers hardness Hmv.
The high-load transmission belt driving device described above is used.

The synergistic effect of the hard alumite-treated coating and the low coefficient of friction further enhances the abrasion resistance.

According to a fourth aspect of the present invention, there is provided a high-load transmission belt driving device in which the thickness of the alumite treatment applied to the block is 20 to 50 μm.

According to the fifth aspect of the present invention, the high load transmission belt driving device has a nickel coating applied to the pulley having a thickness of 5 to 20 μm, which is excellent in chemical resistance and can increase the hardness of the band surface.

According to the sixth aspect of the present invention, the nickel coating applied to the pulley is a high load transmission belt driving device formed by an electroless plating method, whereby a uniform film thickness can be obtained, and high dimensional accuracy can be obtained. A nickel coating containing a low friction material can be formed.

According to a seventh aspect of the present invention, there is provided a high-load transmission belt driving device in which the ratio of a fluorine compound contained in the nickel coating applied to the pulley is in the range of 5 to 40%. Can be operated.

According to claim 8, the V side surface of the block and the V
The V-groove angle of the pulley is a high-load transmission belt drive device of 22 ° to 26 °, and the wedge effect is increased by setting the V angle of the V side surface of the block and the V pulley to 22 ° to 26 °, Even if friction is reduced by the surface treatment applied to the block and the V pulley, power can be transmitted efficiently.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a sectional view of a main part of a high-load transmission belt driving device of the present invention, and FIG. 2 is a schematic side view of the high-load transmission belt driving device.

The present invention relates to a high-load transmission belt driving device 10.
In the longitudinal direction of the endless carrier 2,
A high-load transmission belt that runs on a pair of V-pulleys 11 and 12 by running a high-load transmission belt 1 that is slidable and engages a number of blocks 3 having V side surfaces so as to be in contact with each other. The block 3 used in the high-load transmission belt, which is a driving device, is obtained by subjecting a surface of aluminum or an aluminum alloy to an alumite treatment in which a low friction material is impregnated.

The V-groove surface 13 of at least the block 3 of the V pulleys 11 and 12 is made of a metal such as iron or stainless steel, and a chromium plating process or a nickel coating containing a low-wear material is formed on the surface of the metal. It was done. Moreover, the V groove angle θ of the block and the V pulley is 22 ° to 26 °. The V pulleys 11 and 12 in the present invention may be speed change pulleys capable of changing the effective diameter by expanding or reducing the width of the groove of the pulley, or may be any type of pulley that does not shift.

Since the alumite treatment is performed by impregnating the surface of aluminum or aluminum alloy with a low friction material, the abrasion resistance between the blocks or between the block and the endless carrier is improved, and the durability is improved. It can be excellent. In addition, the overall weight can be reduced. Furthermore, it is easy to manufacture. Furthermore, since the surface of the pulley is also formed with a nickel film containing a low-wear material, the friction between the block and the pulley is extremely small, thereby preventing failure due to frictional wear and extending the life. be able to. Further, by setting the V angle of the V side surface of the block and the V angle of the V pulley in the range of 22 ° to 26 °, the wedge effect increases, and power can be transmitted efficiently even when friction is reduced.

FIG. 3 is a sectional view of a high load transmission belt used in the high load transmission belt driving device of the present invention. FIG.
FIG. 4 is a sectional view taken along line AA in FIGS. 1 and 3. FIG.
In FIG. 4, the high load transmission belt 1 of the present invention fits two endless carriers 2a and 2b into fitting grooves 6 and 7 provided on both sides, and a large number of the endless carriers 2a and 2b are provided on the endless carriers 2a and 2b. Is a belt that is slidable at least in the longitudinal direction of the belt and is locked so as to be in contact with each other. The block in front of the belt traveling direction of the set block is pushed and pushes the next block, and the block around the entire circumference of the belt moves, the driven pulley rotates and the compression transmission type high load transmission belt that transmits power is there.

The block 3 used in the high-load transmission belt 1 used in the present invention, as shown in FIG.
D-shaped, two endless carriers 2 on both left and right sides
The fitting grooves 6 and 7 for inserting a and 2b are open. An inclined surface 10 is provided below so that the belt can be bent on the pulley. When the belt is not bent between the pulleys, the front and rear blocks are in contact only with the upper part. As shown in FIG. 2, a guide convex portion 5 is provided on the front surface in the belt traveling direction, and a guide concave portion 4 is provided on the rear surface at a position corresponding to the guide convex portion 5. The block 3 is arranged on the endless carriers 2a, 2b by fitting the guide recesses 4 with the guide recesses 4.

In the illustrated example, the positions of the guide projections 4 and the guide recesses 5 correspond to one on the line above the block 3.
There are several places. The guide convex portion 4 and the guide concave portion 5 can be provided in various forms, for example, provided at two places on both left and right sides.

The block 3 is subjected to alumite treatment in which a low friction material is impregnated on the surface of aluminum or aluminum alloy processed into a predetermined block shape for the purpose of imparting lateral pressure resistance and bending rigidity. Things.

Here, aluminum or aluminum alloy used is A2000 series, A5000 series.
Series, A7000 series, etc., and are not particularly limited, but are easy to anodize,
Those of the A5000 series that can obtain stable characteristics are preferable.

The alumite treatment is a treatment for forming an oxide film on the surface of aluminum or an aluminum alloy, and a generally well-known anodic oxidation method can be applied. In this method, aluminum or an aluminum alloy is anodically polarized in an arbitrary electrolyte solution, and an oxidation reaction of the following reaction formula (1) is performed on the surface to form an oxide film on the surface. The formed oxide film can be formed to any thickness depending on the electrolytic conditions,
In order to satisfy abrasion resistance and the like as a block for a high-load transmission belt, the thickness is preferably 20 μm to 50 μm. This makes it possible to use the block as a sufficiently high-load transmission belt without any particular buffing after the treatment. Then, the formed oxide film is an aggregate of hexagonal column-shaped cells, and a hole perpendicular to the base material penetrates the center of each cell.

2Al + 3O → Al ₂ O ₃ (1)

As described above, the formed oxide film is an aggregate of hexagonal column-shaped cells, and a hole perpendicular to the base material penetrates the center of each cell. Since it cannot be used as a block for a load transmission belt, it is necessary to seal the hole. By impregnating the sealing material with a low-friction material, the block 3 having excellent wear resistance can be obtained without coating the surface with a resin or the like, and a block for an oil-free operable high-load transmission belt. And can be. As a low friction material to be impregnated,
Fluorine compounds having excellent lubricity are preferred, and polytetrafluoroethylene is particularly preferred. As a result, the difference between the coefficient of static friction and the coefficient of dynamic friction is reduced, and stick-slip can be minimized.

As described above, when the surface of aluminum or aluminum alloy is subjected to alumite treatment, the hardness of the surface becomes
The micro Vickers hardness Hmv can be 250 or more, and the block 3 having excellent lateral pressure resistance can be obtained. In addition, a synergistic effect with the effect of impregnating the low friction material can provide a block having excellent wear resistance over a long period of time. For example, when a shaft load for driving an axle of an automobile is 1.7 kN or more. Can be applied. Since this shaft load depends on the diameter of the pulley used, the shaft load may be lower or higher than 1.7 kN.

The alumite treatment impregnated with a low-wear material can be applied not only to the entire surface of the base material but also to any desired portion. Therefore, it is preferable that the entire surface of the block 3 is anodized by impregnating with a low-wear material because the belt can be run without fear of seizure or the like. It is also possible to apply an alumite treatment in which only a sliding surface is impregnated with a low wear material.

The endless carriers 2a and 2b fitted on both side surfaces of the block 3 are made of a laminate of metal bands made of maraging steel, stainless steel, or the like, or a metal band and a resin band alternately. A laminate, a metal band coated with a resin, and a laminate of resin bands can be used. By using the block 3 impregnated with a low-friction material on the surface and having a low coefficient of friction and excellent wear resistance, even in a compression transmission type belt in which the block 3 is driven by sliding on the endless carriers 2a and 2b, A constant supply of oil for lubrication can be eliminated, and a belt drive device that is closer to maintenance free can be provided.

As the resin which can be used as a material of the endless carriers 2a and 2b, aromatic polyamide resin,
Aromatic polyimide resin, aromatic polyamide-imide resin,
Aromatic polyester resin, polyether ether ketone resin, polyether sulfide resin, polyphenylene sulfide resin, polyethylene terephthalate resin,
Fluororesin, silicone resin, polycarbonate resin, phenol resin, epoxy resin and the like are listed.

As the structure of the endless carriers 2a and 2b, a structure in which a number of thin bands made of the above-mentioned resin are laminated is used. The thickness of one band is 10
When the thickness is less than 50 μm, sufficient strength cannot be obtained, and in particular, the lowermost layer and the uppermost layer easily break due to abrasion with the block 3. This is not preferable because the belt flexibility is deteriorated and the power transmission efficiency is deteriorated.

In order to obtain a predetermined strength, the number of laminated sheets is used in the range of 2 to 10 sheets. When the number of laminated sheets is less than 3, sufficient force for pressing the block 3 toward the inner diameter of the pulley cannot be generated. And the frictional force between them decreases, and the power transmission performance deteriorates. On the other hand, if the number of layers is more than 20, the speed difference between the inner layer and the outer layer becomes so large that slipping occurs, which causes a problem of abrasion and increased heat generation, which is not preferable.

As the endless carriers 2a and 2b, those in which a knitted fabric is embedded in a resin can be used. By embedding the knitted fabric, the dimensional stability, bending fatigue resistance and tear resistance of the endless carriers 2a and 2b in the longitudinal direction can be improved. Can be obtained. In addition, to embed the knitted cloth in the resin here means not only a state in which the knitted cloth is completely hidden in the resin, but also a state in which both ends of the knitted cloth are partially exposed. Also included is a knitted fabric coated with a resin.

The knitted fabric embedded in the resin may be an ordinary knitted fabric, but more preferably an inlay knitted fabric. An inlay knitted fabric is a structure in which linear reinforcing fibers are woven into a normal knitted fabric, and in the direction parallel to the reinforcing fibers, there is little elasticity and excellent dimensional stability and tear resistance. Show properties. Endless carriers 2a, 2
b, the endless carrier 2
The strength in the longitudinal direction of a and 2b can be increased, and dimensional stability and tear resistance can be improved.

The above-mentioned physical properties can be further improved by using aramid fiber, glass fiber or carbon fiber as the reinforcing fiber of the inlay knitted fabric.
As a material used for the knitted fabric, polyester fiber, polyamide fiber, liquid crystal polymer, polyimide fiber, or the like can be used.

Further, by embedding a core wire in the same resin in a spiral shape in the longitudinal direction, it is possible to use an endless carrier which has increased strength and less elongation. As the core wire, a high-strength, low-elongation rope tensile body made of polyester fiber, polyamide fiber, aramid fiber, glass fiber, carbon fiber, or the like can be used.

Further, the resin used as the endless carriers 2a and 2b can be filled with short fibers.
By filling short fibers, endless carriers 2a, 2b
The surface friction coefficient can be reduced, and the wear resistance can be increased. Examples of the short fiber include a chemical fiber such as a polyamide fiber and an aramid fiber, a metal fiber, a carbon fiber, and the like. By filling these fibers, a reinforced resin can be obtained. It is also possible to reinforce the sliding surface by partially exposing the fiber component, and to adjust the friction coefficient of the surface.

Also, by mixing at least one selected from molybdenum disulfide, graphite, and fluororesin into the resin, the friction coefficient of the surfaces of the endless carriers 2a and 2b can be reduced. Examples of the fluorine-based resin include polytetrafluoroethylene (PTFE), polyfluoroethylene propylene ether (PFPE), tetrafluoroethylene hexafluoropropylene copolymer (PFEP), and polyfluoroalkoxyethylene (PFA). .

In this embodiment, two endless carriers 2a and 2b are used to fit the fitting groove 6 of the D-shaped block 3,
Although the description has been given of the case where the carrier is mounted on the base 7, one endless carrier may be used in a substantially U-shaped block as shown in FIG. 3.

As shown in FIG. 5, the block 20 in this case is composed of two width direction members 21 and 22 and a connection member 23 which connects them at one end. A groove into which the endless carrier 24 is inserted is opened. Guide portions 25 and 26 for connecting the blocks 20 are provided on both left and right sides. The high-load transmission belt according to the present invention is not limited to the above-described embodiment, but has various forms, for example, a shaft load of 1.7.
The present invention can be applied to axle driving of an automobile having a kN or more, or to a compression transmission type high load transmission belt such as agricultural equipment.

In the V-pulley used in the high-load transmission belt driving device of the present invention, the surface of the V-groove in contact with the V side surface of the block of the high-load transmission belt is made of metal such as iron or stainless steel. The surface thereof is subjected to a chromium plating treatment, or a nickel coating containing a low-abrasion material, which has high hardness, high gloss, good resistance to discoloration, excellent chemical resistance, good deposition uniformity, is formed.

The chromium plating is a plating of chromium on the surface of a metal. In the present invention, it is preferable to use a hard chromium plating or a hard chromium plating capable of obtaining higher hardness by a treatment called hard chromium plating. . Due to its low friction coefficient and high hardness derived from its smoothness, it has excellent wear resistance and does not wear the mating material.

As the low friction material impregnated in the nickel film, a fluorine compound excellent in lubricity is preferable, and polytetrafluoroethylene (PTFE), polyfluoroalkoxyethylene (PFA), propylene fluoride copolymer (F
EP), ethylene tetrafluoroethylene (ETFE) and the like, and in particular, polytetrafluoroethylene (P
TFE) is preferred. As a result, the difference between the coefficient of static friction and the coefficient of dynamic friction is reduced, and stick-slip can be minimized.

The nickel film impregnated with such a low wear material made of a fluorine compound is made of an electroless nickel and the above-mentioned fluorine compound, and nickel sulfate, sodium hypophosphite, lactic acid, propionic acid, lead or the like in water. The compound is co-deposited in the blended processing solution, and the fluorine compound is 5 to 40%, preferably 10 to 40%.
A film containing about 30% is formed, and then heat-treated to bring electroless nickel and a fluorine compound into close contact. When the content of the fluorine compound is less than 5%, the lubricity is not improved,
The effect of adding the fluorine compound does not appear. Also, 40%
Exceeding the surface hardness is not preferred because the surface hardness decreases and the amount of wear during operation increases. Since the nickel coating impregnated with the low wear material made of the fluorine compound is formed in this way, the number of pinholes on the surface can be reduced, and a coating layer having less variation in coating thickness can be formed. The coating layer can be formed with high dimensional accuracy. Further, the coating thickness can be adjusted within a range of 5 to 20 μm. By adjusting the thickness of the coating within the range of 5 to 20 μm, the hardness of the surface can be adjusted to 300 to 600 in terms of the micro Vickers hardness Hmv. Also, -20
Stable performance can be exhibited in a wide temperature range of 0 to 200 ° C.

In the present invention, the angle of the V-side surface of the block and the angle of the V-groove of the V-pulley are in the range of 22 ° to 26 °. The angle of the present invention is smaller than that of a normal V-belt because a normal V-belt uses a V-angle of about 30 ° to 40 °, but by setting such a small angle, a larger wedge is obtained. The effect will be obtained. In the present invention, the friction is reduced by treating the surfaces of the block and the V-pulley to prevent a failure due to friction and wear. However, since the V-belt is a friction transmission, an efficient transmission is performed if the friction is too small. It will be hindered. Therefore, in the present invention, by setting the angle of the V side surface of the block and the V groove angle of the V pulley to a small angle of 22 ° to 26 ° to enhance the wedge effect, slip is reduced and power can be transmitted efficiently. .

If the angle of the V-side surface of the block and the angle of the V-groove of the V-pulley are less than 22 °, the wedge effect becomes too large, so that the block does not easily come off from the V-pulley while the belt is running, so that wear is accelerated and noise is reduced. Problems also arise. On the other hand, if the angle exceeds 26 °, the wedge effect becomes too small, the slip of the belt increases, and the power transmission efficiency decreases, which is not preferable.

[0052]

The present invention will be described below in detail with reference to examples.

Example 1 A surface having a shape as shown in FIG. 3 impregnated with polytetrafluoroethylene was 50 μm thick.
A belt using an A5052 aluminum alloy block having an anodized aluminum film. The endless carrier is made of a polyimide resin in which a cord made of PBO fiber is embedded in a spiral shape, and has a thickness of 500 μm and a width of 8 mm.
A high-load transmission belt was formed by laminating four of the above bands. The V-pulley was made of iron, and a V-groove having a nickel coating containing 20% of polytetrafluoroethylene formed on the surface of the V-groove to a thickness of 10 μm was used. The V angle of both the V side surface of the block and the V groove of the V pulley was 22 °.

The belt was run under the conditions shown in Table 1 and the time until the end of the life was measured. Here, the criterion for determining the life was measured as the time until the surface treatment layer of the block disappeared. Table 2 shows the results.

(Comparative Example 1) A high-load transmission belt was prepared in the same manner as in the Example, except that the V pulley was not subjected to the process of forming a nickel film, but was only hardened with iron.

The belt was run under the conditions shown in Table 1 and the time until the end of the life was measured. Here, the criterion for determining the life was measured as the time until the surface treatment layer of the block disappeared. Table 2 shows the results.

[0057]

[Table 1]

[0058]

[Table 2]

As can be seen from the results in Table 2, the life of the belt (the removal of the treated layer of the block) is greatly changed depending on the presence or absence of the surface treatment of the pulley. It was confirmed that it could be extended.

Next, a comparative test was performed in which the V angle of the V side surface of the block and the V groove of the V pulley were changed.

(Example 2) Example 1 except that the V-side angles of the V-side surface of the block and the V-groove of the V-pulley were both set to 24 °.
A high load transmission belt was prepared in the same manner as described above. The slip ratio and noise when the belt was run under the conditions shown in Table 1 were measured. Table 3 shows the results.

(Embodiment 3) The V-side of the block and the V-angle of the V-groove of the V-pulley were both set to 26 °, except that they were 26 °.
A high load transmission belt was prepared in the same manner as described above. The slip ratio and noise when the belt was run under the conditions shown in Table 1 were measured. Table 3 shows the results.

(Comparative Example 2) Example 1 was the same as Example 1 except that the V angle of the V side surface of the block and the V groove of the V pulley were both set to 20 °.
A high load transmission belt was prepared in the same manner as described above. The slip ratio and noise when the belt was run under the conditions shown in Table 1 were measured. Table 3 shows the results.

(Comparative Example 3) Example 1 was the same as Example 1 except that the V angle of the V side surface of the block and the V groove of the V pulley were both set to 30 °.
A high load transmission belt was prepared in the same manner as described above. The slip ratio and noise when the belt was run under the conditions shown in Table 1 were measured. Table 3 shows the results.

[0065]

[Table 3]

If the V angle between the V side surface of the block and the V groove of the V pulley is too small, the block will not easily come off the pulley and the noise will be high. On the other hand, if the angle is too large, the noise due to slip will be high. As a result, the sound pressure increases. As can be seen from the results in Table 3, the V angle between the V side surface of the block and the V groove of the V pulley is within a predetermined range (22 ° to 2 °).
It can be seen that good results were obtained with respect to slip ratio and noise within 6 °).

[0067]

The present invention is configured as described above.
According to the invention of claim 1, in the longitudinal direction of the endless carrier,
In a high-load transmission belt drive device in which a high-load transmission belt formed by engaging blocks having a large number of V side surfaces so as to be slidable and in contact with each other runs on at least a pair of V pulleys, The surface of aluminum or aluminum alloy is subjected to alumite treatment impregnated with a low friction material, and the pulley is made of metal, and the surface of the metal is formed with a chrome plating treatment or a nickel coating containing a low wear material. And the V angle of the block and the V pulley is 22 ° to 26 °.

An alumite-treated block in which the surface of aluminum or an aluminum alloy is impregnated with a low friction material, so that the abrasion resistance between the blocks or between the block and the endless carrier is improved, and the durability is excellent. And can be. In addition, the overall weight can be reduced. Furthermore, it is easy to manufacture. Furthermore, since the surface of the pulley is also formed with a nickel film containing a low-wear material, the friction between the block and the pulley is extremely small, thereby preventing failure due to frictional wear and extending the life. be able to.

A second aspect of the present invention is the high load transmission belt driving device according to the first aspect, wherein the low friction material is a fluorine compound.

Since the fluorine compound is impregnated, the difference between the coefficient of static friction and the coefficient of dynamic friction is small, and stick-slip can be minimized.

In the third aspect, the hardness of the alumite treatment applied to the block is 250 micro Vickers hardness Hmv.
The high-load transmission belt driving device described above is used.

The synergistic effect of the hard anodized coating and the low coefficient of friction further enhances the abrasion resistance.

According to a fourth aspect of the present invention, a high load transmission belt driving device is provided in which the thickness of the alumite treatment applied to the block is 20 to 50 μm.

According to the fifth aspect, the high load transmission belt driving device has a nickel coating applied to the pulley having a thickness of 5 to 20 μm, which is excellent in chemical resistance and can increase the hardness of the band surface.

According to a sixth aspect of the present invention, the nickel coating applied to the pulley is a high-load transmission belt driving device formed by an electroless plating method, so that a uniform film thickness can be obtained and high dimensional accuracy can be obtained. A nickel coating containing a low friction material can be formed.

According to a seventh aspect of the present invention, there is provided a high-load transmission belt driving device in which the ratio of the fluorine compound contained in the nickel coating applied to the pulley is in the range of 5 to 40%. Can be operated.

In the eighth aspect, the V side surface of the block and the V
The V-groove angle of the pulley is a high-load transmission belt drive device of 22 ° to 26 °, and the wedge effect is increased by setting the V angle of the V side surface of the block and the V pulley to 22 ° to 26 °, Even if friction is reduced by the surface treatment applied to the block and the V pulley, power can be transmitted efficiently.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a high-load transmission belt driving device according to the present invention.

FIG. 2 is a schematic side view of the high-load transmission belt driving device of the present invention.

FIG. 3 is a front view of one embodiment of a high-load transmission belt used in the present invention.

FIG. 4 is a sectional view taken along line AA in FIGS. 1 and 3;

FIG. 5 is a front view of another embodiment of the high-load transmission belt used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High load transmission belt 2a, 2b Endless carrier 3 Block 4 Guide concave part 5 Guide convex part 6, 7 Fitting groove 10 Slope

Claims (8)

[Claims] 1. A high-load transmission belt in which a plurality of blocks having a plurality of V side surfaces are engaged with each other so as to be slidable and in contact with each other in the longitudinal direction of an endless carrier. In the high-load transmission belt drive device to be run, the block is made of aluminum or an aluminum alloy and the surface of which is anodized by impregnating a low friction material, and the pulley is made of a metal and the surface of the metal is chrome-plated Alternatively, a high-load transmission belt driving device, wherein a nickel coating containing a low-wear material is formed. 2. The high load transmission belt driving device according to claim 1, wherein the low friction material is a fluorine compound. 3. The high-load transmission belt driving device according to claim 1, wherein the hardness of the alumite treatment applied to the block is 250 or more in terms of micro Vickers hardness Hmv. 4. The high load transmission belt driving device according to claim 1, wherein the thickness of the alumite treatment applied to the block is 20 to 50 μm. 5. The thickness of the nickel coating applied to the pulley is 5
The high-load transmission belt driving device according to any one of claims 1 to 4, wherein the thickness of the belt driving device is from 20 to 20 m. 6. The high load transmission belt driving device according to claim 1, wherein the nickel coating applied to the pulley is formed by an electroless plating method. 7. The method according to claim 1, wherein the proportion of the fluorine compound contained in the nickel coating applied to the pulley is in the range of 5 to 40%.
7. The high load transmission belt driving device according to 6. 8. The high load transmission belt driving device according to claim 1, wherein the V-side surface of the block and the V-groove angle of the V-pulley are 22 ° to 26 °.