JPH1182638A - High-load transmission belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the most of merits of a thrust transmission mode and reduce pitch noise, by embedding core bodies in an elastomer of a flat belt body of an endless carrier, disposing slide bands on contact surfaces of the flat belt body with a block, and disposing a resin on a contact surface of the flat belt body with a pulley of the block. SOLUTION: In an endless carrier 2, slide bands 7 are disposed on contact surfaces of a flat belt body 6 with a block 3 and, in the flat belt body 6, core bodies 5 using synthetic fiber such as polyamide, polyester, and aramid, are embedded in an elastomer 4 made of a rubber composition consisting of a simple material or a blended material of rubbers such as natural rubber and chloroprene rubber. In the slide band 7, resin such as aromatic polyamide resin, aromatic polyimide resin, aromatic polyamide-imide resin, is disposed on a contact surface of the block 3 with the endless carrier 2. Thereby offensive pitch noise can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt for high load transmission, comprising an endless carrier and a block for reinforcing lateral pressure resistance.

[0002]

2. Description of the Related Art Conventionally, a rubber V-belt has been used as a belt applied to applications requiring high load transmission, such as a continuously variable transmission, but a rubber V-belt for high load has been used. Even if the maximum surface pressure is 10kg / cm
If the torque is about 2 or more, and the torque is more than that, the rubber V-belt cannot withstand high side pressure and is buckled.

In view of this, there has been proposed a push transmission type metal belt in which a metal block slides on an endless carrier which is a multilayer structure of a metal band as disclosed in Japanese Patent Application Laid-Open No. 55-100443. Metal belts have excellent lateral pressure resistance and can withstand considerable high side pressure, so they are not easily buckled and deformed.Because of the push transmission, there is no need to lock the block by engaging it with a metal band. Therefore, the pitch can be reduced by reducing the thickness of the block, so that it can be said that the belt can reduce unpleasant noise when the belt runs.

Therefore, a block made of a hard resin or the like is fixed to a rubber belt in which a core body is embedded as a dry belt which does not require oil lubrication and which can withstand a high load, thereby increasing the strength in the belt width direction. Many belts with improved durability have also been proposed.

An example of a tension transmission belt using a block made of such a resin is disclosed in Japanese Patent Publication No. Sho 62-7418.
There is a block disclosed in Japanese Patent Application Laid-Open Publication No. H10-15064, in which slots are provided on both side surfaces, and a rubber belt is inserted into the slots.

This belt uses a resin for the block, and since the block has a self-lubricating property, there is no need to constantly supply oil, and the belt can be used in a more compact and maintenance-free manner. There is.

[0007]

However, among the above-mentioned belts, the belt as disclosed in Japanese Patent Application Laid-Open No. 55-100443 has a structure in which the block and the metal film are both made of metal, and the pulleys are also made of metal. It is sliding between metals, and seizure occurs unless oil is constantly supplied. Then, there is a problem that a box for sealing the belt is required, a means for constantly supplying oil is required, and periodic inspection is required to keep the amount of oil within a certain range.

Further, in order to provide a device for supplying oil and to perform friction transmission under a condition where the friction coefficient is low such as in oil, a large distance is required between the pulley and the belt. Pressure is required, and in order to obtain sufficient pressure, high strength is required for the drive shaft, the driven shaft, its bearings, and the like, which necessarily results in a large-sized device. In addition, due to the relationship between the speed difference between the inner circumference side and the outer circumference side of the belt, the endless carrier must be formed by laminating a plurality of metal bands, but it can run smoothly and reduce the tension applied to each metal band. In order to make the length uniform, the accuracy of the length dimension is required to be extremely high.

In the case of a belt as disclosed in Japanese Patent Publication No. 62-7418, the block is made of resin and the tension band is made of an elastomer such as rubber. There is no need to supply. However, since the block and the tension band are tension transmissions in a fixed relationship, a certain thickness of the block is required to withstand the shearing force generated between the block and the tension band. It is disadvantageous over the above-mentioned metal belt in that noise is generated.

The present invention provides a high-load transmission belt which is low in pitch noise by taking advantage of the push transmission system, and which does not need to always supply oil, and which does not require a dimensional accuracy that is so high. With the goal.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the present invention, there is provided an endless carrier in which engagement grooves of a plurality of blocks are slidably engaged with each other in a longitudinal direction. In a high-load transmission belt in which guide protrusions and guide recesses are provided on the front and rear surfaces of the block, and adjacent blocks are aligned by fitting the guide protrusions and the guide recesses, the endless carrier has a core in an elastomer. The flat belt body comprises a buried flat belt body and a sliding band disposed on a surface of the flat belt body which is in contact with the block, and a resin is disposed on at least a surface of the block which is in contact with the pulley.

With the above-described structure, the thickness of the block can be reduced, so that unpleasant pitch noise can be suppressed as much as possible. In addition, since the endless carrier is made of a resin material, oil is continuously supplied. Since there is no need for lubrication, a high-load transmission belt that is more compact and maintenance-free can be realized. Further, since the endless carrier is not a multilayer body of bands made of metal or the like, it is not necessary to make the length accuracy of the sliding band very high.

According to the second aspect, since the sliding band is made of resin, the whole belt is lightweight and can be smoothly slid in combination with the resin arranged in the block.

According to the third aspect, the resin constituting the sliding band is filled with short fibers, so that the wear resistance of the endless carrier can be improved.

According to a fourth aspect of the present invention, at least one selected from molybdenum disulfide, graphite, and a fluororesin is mixed in the resin constituting the resin constituting the sliding band, so that the friction of the endless carrier surface is improved. The coefficient can be made lower and the wear resistance can be improved.

According to the fifth aspect of the present invention, the sliding band is made of metal, and the durability of the sliding band is excellent, so that a belt having a longer life can be obtained.

[0017]

FIG. 1 is a sectional view of a high-load transmission belt according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. The high-load transmission belt 1 according to the present invention is a belt in which a large number of metal blocks 3 are slidably engaged in at least the longitudinal direction of the belt on an endless carrier 2. The block is moved by the pulley, and the block in front of the moved block in the belt traveling direction is pushed and pushes the next block, and the block around the entire belt moves, and the driven pulley rotates to transmit power. It is a transmission type belt.

A feature of the present invention is the endless carrier 2, and the endless carrier 2 has a sliding band 7 disposed on a contact surface of the flat belt body 6 in which the core body 5 is embedded in the elastomer 4 with the block 3. It consists of a configuration. Resin is arranged on the contact surface of the block 3 with the endless carrier 2 and the sliding band 7 is arranged on the contact surface of the endless carrier 2 with the block, so that the block 3 slides and drives. Even in a power transmission type belt, continuous supply of oil for lubrication can be eliminated, so that it is possible to provide a belt drive device that is more maintenance-free.

Further, the endless carrier 2 has a structure in which a sliding band 7 is laminated on a flat belt body 6 made of an elastomer, instead of a multilayer body of a metal band as in a conventionally used push transmission type belt. The sliding band 7 laminated on the elastomer 4 having elasticity does not require a very strict length dimension. The sliding band 7 does not need to be integrally laminated by bonding to the flat belt body 6, for example.
Simply superimpose it.

Flat belt body 6 constituting endless carrier 2
Is a core body 5 buried in an elastomer 4,
As the elastomer 4, NR (natural rubber), SBR
(Styrene / butadiene rubber), CR (chloroprene rubber), NBR (nitrile rubber), CSM (chlorosulfonated polyethylene), HNBR (hydrogenated nitrile rubber), and rubber such as HNBR containing unsaturated carboxylic acid metal salt. A rubber compound or a polyurethane resin composed of one material or a blend is exemplified.

The core body 5 is made of a synthetic fiber such as polyamide, polyester or aramid, or a twisted cord made of a single or blend of inorganic fibers such as steel cord, glass fiber cord and carbon fiber cord, or a woven fabric woven of these fibers. A cloth or the like can be used. When a twisted cord is used, it is embedded in the elastomer 4 in a spiral shape.

The sliding band 7 is an endless body made of a resin or a metal. Examples of the resin include an aromatic polyamide resin, an aromatic polyimide resin, an aromatic polyamideimide resin, an aromatic polyester resin, and a polyether ether. Ketone resin, polyether sulfide resin, phenol resin, epoxy resin, and the like, and as the metal, maraging steel, 15-7PH, SUS
304 and the like.

The sliding band 7 can be formed by laminating one or several thin endless bodies made of the above-mentioned resins. The thickness of one endless body is used in the range of 50 to 300 μm. If the thickness is less than 50 μm, sufficient strength cannot be obtained, and particularly, the lowermost layer and the uppermost layer are easily cut due to abrasion with the block. When the thickness exceeds 300 μm, the flexibility of the belt deteriorates and the power transmission efficiency deteriorates, which is not preferable.

Since the flat belt body 6 is stretched a little by applying tension during the running of the belt, the length of the sliding band 7 is adjusted in view of the width of the belt. 100 to the length of the surface on which the moving band contacts
Set to the range of 103%. If the length is too long or too short, the dimensional difference between the flat belt body 6 and the sliding band 7 becomes too large, and phenomena such as wear occur.

When a resin is used as the sliding band 7, it is possible to fill the resin with short fibers. By filling the short fibers, the friction coefficient of the endless carrier surface can be reduced. Pressure resistance can be increased. Chemical fibers such as polyamide fibers and aramid fibers, metal fibers,
Carbon fiber and the like can be mentioned, and by filling them, 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.

The friction coefficient of the surface of the endless carrier 2 can also be reduced by mixing at least one selected from molybdenum disulfide, graphite, and a fluororesin into the resin. As a fluorine resin,
Examples include polytetrafluoroethylene (PTFE), polyfluoroethylene propylene ether (PFPE), tetrafluoroethylene hexafluoropropylene copolymer (PFEP), and polyfluoroalkoxyethylene (PFA).

In the example shown in FIG. 1, the block 3 comprises two width members 8 and 9 and a connecting member 10 for connecting the two members at one end. The groove for inserting is opened.

The shape of the block 3 is not limited to that shown in FIG. 1, but as shown in FIG. 3, an I-shape comprising two widthwise members 8, 9 and a connecting member 10 connecting them at the center. The block 3 may be used. In this case, a pair of grooves for inserting the endless carrier 2 is opened on both side surfaces of the block 3, and the block 3 is slidably engaged on the pair of endless carriers 2. It may be a stopped belt.

A substantially U-shaped block 3 as shown in FIG. 4 is provided with a groove above which the endless carrier 2 is inserted. The locking portion 3a is provided so that the inserted endless carrier 2 does not come off. The high load transmission belt 1 provided with 3a may be used.

The block 3 is provided with an inclined surface 11 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. ing. And FIG.
The guide member 12 is provided on the front surface of the connecting member 10 in the belt traveling direction as described above, and the guide concave portion 13 is provided on the back surface at a position corresponding to the guide protrusion. The blocks 3 are arranged on the endless carrier 2 by fitting the guide recesses 13.

The guide projections 12 and the guide recesses 13 can be provided in various forms such as one at the center line in the width direction of the width direction member 8 and two at the left and right sides. In the present invention, the resin layer 14 is disposed on the block side on the side surfaces 3 b, 3 b, which are the contact surfaces of the block 3 with the pulleys, and on the sliding surface between the block 3 and the endless carrier 2. In other words, by arranging and interposing the resin layer 14 in a portion where large friction occurs in the high-load transmission belt 1,
Oil-free sliding can be performed between the sliding band 7 of the endless carrier 2 and a maintenance-free belt that does not require lubrication for supplying oil as in the related art.

The resin used for the resin layer 14 has a relatively large friction coefficient and excellent wear resistance.
Specifically, a hard rubber having a hardness of 90 ° JIS A or more, a hard polyurethane resin, a liquid crystal resin, a phenol resin, an epoxy resin, a polyamide resin, a polyester resin, an acrylic resin, a methacrylic resin, a polyetheretherketone (PEEK) resin, and the like. Although a synthetic resin is used, it is particularly preferable to use a resin having a low friction coefficient.

In these resins, synthetic fibers such as cotton yarn, polyamide fiber and aramid fiber, short fibers made of glass fiber, metal fiber, carbon fiber, etc., woven fabric, filler, whisker, silica, calcium carbonate, etc. It is also possible to use a reinforced resin mixed with an inorganic material or the like. It is also possible to reinforce the sliding surface by partially exposing the fiber component, and to adjust the friction coefficient of the surface.

The block 3 is embedded with an insert material 15 as a part for imparting lateral pressure resistance and bending rigidity to the block, and the material may be a metal such as an aluminum alloy or iron. Even if the same material as that of No. 14 or a resin reinforced with a woven cloth of carbon fiber or aramid fiber, or a resin having sufficient strength is used, it does not depart from the spirit of the present invention.

The block 3 is made of a metal material in terms of imparting lateral pressure resistance and bending rigidity, and it is preferable to use a block in which a predetermined portion of a metal core is covered with a resin layer 14. With the above configuration, in the high-load transmission belt having the configuration of the present invention, particularly, a portion where the sliding is large and the friction is remarkably generated is the resin layer 14.

When arranging the resin layer 14 at a predetermined position,
Almost the entire surface is formed of a resin layer 14 using an insert material 15 made of a metal material slightly smaller than the size of the block.
It is preferable to use a material covered with a resin layer, since a problem such as peeling of the resin layer hardly occurs as compared with a case where the resin layer 14 is partially covered. However, even if the entire surface is in contact with the member fixing the insert material 15 when covering the resin layer 14 in the manufacturing process, a portion where the insert material 15 is exposed occurs, The exposure of the insert material 15 to that extent is
It can be said that this is included in a form in which the substantially entire surface is covered with a resin.

However, by arranging the resin layer 14 on other portions as described below, it is possible to make the belt run without fear of burning.
The portions of the guide protrusions 12 and the guide recesses 13 provided on the front surface and the back surface of the block 3 in the belt running direction are the front and rear blocks 3.
Are fitted to each other, but when the belt is bent, sliding occurs at that portion and friction occurs.
Therefore, by using one or both of the guide protrusions 12 and the guide recesses 13 as a resin layer, rattling between the guide protrusions 12 and the guide recesses 13 is less likely to occur, and the life of the belt can be extended. it can. Of course, the entire guide protrusion 12 may be a resin layer.

[0038]

As described above, according to the high load transmission belt of the present invention, the engaging grooves of the plurality of blocks are slidably engaged with the endless carrier on the endless carrier in the longitudinal direction, and the adjacent blocks are connected to each other. In a high load transmission belt of a push transmission type in which the guide convex portion and the guide concave portion are aligned by fitting, the endless carrier is in contact with a flat belt body having a core buried in an elastomer and a block of the flat belt body. A sliding band is provided on the surface, and a resin is provided on the contact surface of the block with the endless carrier.

With the above configuration, the thickness of the block can be reduced, so that unpleasant pitch noise can be suppressed as small as possible, and the endless carrier has a sliding band laminated on the surface of the flat belt body. With the configuration, the length dimension of the sliding band itself is not required to be extremely high in precision, unlike the conventional endless carrier in which a number of metal bands are stacked. Further, since there is no need to continuously supply oil and lubricate, it is possible to realize a compact and maintenance-free high-load transmission belt.

According to the second aspect, the sliding band is made of resin, and the friction and wear between the block and the endless carrier can be reduced in combination with the resin arranged in the block.

According to the third aspect, since the resin constituting the sliding band is made of resin filled with short fibers, the coefficient of friction of the surface of the endless carrier can be further reduced and maintained for a long period of time. it can.

In the present invention, the friction coefficient of the surface of the endless carrier can be further improved by mixing at least one selected from molybdenum disulfide, graphite, and a fluorine resin into the resin constituting the sliding band. Can be lower.

According to the fifth aspect, since the sliding band is made of metal, there is an effect that the durability is excellent over a longer period.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a schematic perspective view of an endless carrier.

FIG. 4 is a sectional view corresponding to FIG. 1 and showing another example of a block;

FIG. 5 is a cross-sectional view corresponding to FIG. 1 and illustrating another example of a block.

FIG. 6 is a sectional view taken along line BB in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High load transmission belt 2 Endless carrier 3 Block 4 Elastomer 5 Core 6 Flat belt 7 Sliding band 8 Width member 9 Width member 10 Connecting member 14 Resin layer

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[Procedure amendment]

[Submission date] December 12, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a cross-sectional view corresponding to FIG. 1 showing another example of a block;
It is.

FIG. 4 is a block diagram corresponding to FIG. 1 showing still another example of a block;
FIG.

FIG. 5 is a sectional view taken along line BB in FIG . 1;

[Description of Signs] 1 High-load transmission belt 2 Endless carrier 3 Block 4 Elastomer 5 Core 6 Flat belt 7 Sliding band 8 Width member 9 Width member 10 Connecting member 14 Resin layer

Claims (5)

[Claims] An engaging groove of a plurality of blocks is slidably engaged with an endless carrier in a longitudinal direction, and guide protrusions and guide recesses are provided on front and rear surfaces of the blocks. In a high-load transmission belt in which a convex portion and a guide concave portion are aligned by fitting, an endless carrier is disposed on a flat belt body in which a core body is embedded in an elastomer and a surface of the flat belt body on a side in contact with a block. A high-load transmission belt comprising a sliding band and a resin disposed on at least a surface of the block in contact with the pulley. 2. The high-load transmission belt according to claim 1, wherein the sliding band is made of resin. 3. The high-load transmission belt according to claim 1, wherein the resin constituting the sliding band is a resin filled with short fibers. 4. The high-load transmission according to claim 1, wherein the resin constituting the sliding band is filled with at least one selected from molybdenum disulfide, graphite, and a fluorine-based resin. belt. 5. The high-load transmission belt according to claim 1, wherein the sliding band is made of a metal, and a resin is disposed on a contact surface of the block with the sliding band.