JPH10169721A - Belt and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the partial destruction of part of a cog to extremely improve the durability and reliability of a belt, by arranging flexible and high-elastic reinforcing bodies made of metal in all the belt width directions of the plural cogs. SOLUTION: In the inside of the main body of a belt 1, a core wire 11 spirally aligned has a tension member 13 enclosed by the rubber layer 12 of a matrix material. The region of a canvas material 19 and a rubber layer 12' is enclosed by the rubber layer 17 of elastic-viscous elastomer, and the insides of cogs 15a and 15b are formed by pressure-injecting an elastic-viscous resin material. A sudden shock load and sudden abnormal vibration act on the other adjoining and successive cogs in order so as to be adequately and surely diffused, because in this constitution and the respective cogs, high elastic reinforcing bodies 21a and 21b are connected in a belt width direction, and the resin materials are integrally and closely connected with each other while retaining an elastic and viscous property by mating low-elastic-viscous resins 17a and 17b in all adjoining cogs 15a and 15b in a belt longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt and a method for manufacturing the belt, and more particularly to a cog belt manufactured by integrally forming a viscoelastic material to be applied to high load transmission. The present invention relates to a belt for continuously variable transmission and a method for manufacturing the belt.

In recent years, belts that are small and that transmit high loads have been developed in various fields for continuously variable transmissions used in automobiles and general industrial machines. Currently, the following two types of high-load belt structures have been proposed.

[0003] First, a high load transmission is achieved by pushing a large number of block rows from the loose side of the belt being transmitted between the belt and the pulley in principle, and is a so-called push type. The second type is a so-called tension type in which the belt is pulled into the V-groove on the tension side of the belt by using the rigidity of a chain or a link and suspended by a driving pulley.

FIG. 12 is a schematic structural view showing one side cross section of a conventional belt-pulley contact surface. This example is an example of a so-called push-type belt, in which the belt 1 has upper and lower disks 2a, 2b.
2 shows a state where the pulley 2 is sandwiched between V-grooves. The belt 1 is configured such that a number of block pieces 3 are suspended from annular rings 4a and 4b. The block pieces 3 are made of a thin plate in which the hanging portions 3a and the support portions 3b are integrally formed, and are suspended in a state where a large number are arranged.

[0005] In this type of push-type belt 1, the high load transmission is realized by forcibly feeding the block pieces 3 from the drive pulley to the driven pulley by integrally forming the multiple block pieces 3. Even if the belt and the pulley are small, high load and large horsepower can be transmitted.

On the other hand, in a tension type belt (not shown), a large number of metal blocks are held on a chain or a link assembled with a large number of pins and plates, and these blocks are fitted into V-grooves of a pulley, thereby bending the chain. High load transmission is performed by utilizing the tensile force of rigidity and rigidity.

[0007]

FIG. 1 is an operation explanatory diagram for explaining the transmission principle of a belt transmission. In the drawing, reference numeral 5 denotes a drive-side transmission pulley, and 2 denotes a driven-side transmission pulley, between which a belt 1 is wound. In each case, the center axes C ₁ and C ₀ are respectively clockwise in the directions of arrows 5C and 2C.
Is assumed to be pivoting about.

In FIG. 1, a solid line 1 indicates a belt trajectory during a constant speed operation at a speed ratio R ₁ / R _{0, and} a dotted line 1 ′ indicates a belt trajectory during a speed change operation, that is, a time instant at which a shift is started. Is shown. That is, in the example on the drawing, the belt 1 is given to the driving pulley 5 and the driven pulley 2 at the moment when the speed increase command is given while the gears are rotating at a constant speed state of the speed ratio R ₁ / R ₀ . Analyzing the operating state.

[0009] During the constant velocity rotation shown pulleys 5,2 are in solid line, the contact surface with the pulley of the belt 1, the same radius R ₁ in total contact area of the substantially left half 5L of the drive pulley 5 The driven The radius _R0 is in the entire contact area of the substantially right half 2R of the pulley 2. Therefore, the V-
It is substantially symmetrical up and down about the V line. Further, the transmitted load is also substantially uniformly distributed over the entire block in the contact area.

On the other hand, at the moment when the speed change command is supplied to both pulleys 5 and 2, the contact radius of the contact area of each pulley changes as shown by dotted lines 1'U and 1'Z. The pulley 5 has a contact radius r _A ′, r _B ′, r _C ′, and r _D ′, as shown in FIG.
In this case, the radius gradually increases toward the loose side 1′X as in the contact radii r _A , r _B , r _C , and r _D. Do not become vertically symmetrical. The belt is in such an irregular state only for a moment.

Therefore, in the example of the driven pulley 2 side, the belt 1 '
When the contact state between the motor and the pulley 6 is analyzed, FIG.
Or (D) an irregular cross-sectional state. That is, FIG.
2A to 12D correspond to points A to D of the pulley 2 shown in FIG. 1, respectively.

The contact radii at points A, B, C and D in FIG. 1 have a relationship of r _A <r _B <r _C <r _D and, as a result, as shown in FIG. since the thickness is constant, a the position of the rigid belt 1 the minimum radius r _a of FIG. 12A
Only at the point is the pulley 2 in contact with both end surfaces 3a, 3b.

Therefore, point B at a position of a radius larger than this,
At points C and D, as shown in FIG. 12B, FIG. 12C, and FIG. 12D, at any point, not only is the belt 1 and the pulley 2 not in contact, but the gap between the pulley 2 and the belt 1 is further increased. .

The reason is that although the two discs 2a and 2b are pressed in advance by an extremely large external pressure such as hydraulic pressure, each block 3 of the belt 1 is made of metal or the like. This is because a rigid body is used and does not expand or contract in the width direction.

However, this state is instantaneous, and at the next instant, the belt 1 'rotates and is pulled by the pulling force in the longitudinal direction of the pulling side belt 1'Y, so that the belt 1' moves toward a constant velocity state.

Therefore, this means that each time a shift command from the outside is supplied, an extremely large pressing force is concentrated only at one point A at the time of transmitting a large horsepower and a high output power. At the next moment, it is shown that the concentrated load at the point A causes a phenomenon of being dragged on the pulley contact surface by the pulling force of the belt.

Therefore, both of the above-mentioned two types of push-type and tension-type belts are assembled from a block row of a large number of rigid materials, and if this type of conventional belt is applied to a continuously variable pulley, a shift command is inevitable. Each time is supplied to the pulleys 5 and 2, an extremely large transmission load, for example, a load of 1000 to 2000 kg or more is suddenly concentrated and applied to only one or two of the many block pieces 3, There was a fatal defect that some of the small block pieces 3 came off and were scattered, broken or deformed, and became unusable with a short life.

Furthermore, not only the belt 1 but also the contact surfaces of the speed change pulleys 5 and 2 are directly damaged by the deformed block pieces 3. This means that even if the belt 1 is newly converted, the scratched portion generates an abnormal noise, wears the belt and pulley contact surfaces, easily causes damage, and again causes a short-term failure. After all, great horsepower
The high-load transmission itself became impossible to realize.

An object of the present invention is to provide a tension type belt in which each cog expands and contracts with respect to a concentrated load in the belt width direction so that a sudden and extremely large concentrated load is not applied to a small number of cogs. And actively disperse it to a number of adjacent cogs that follow. In addition, abnormal vibrations due to excessive load or sudden load are not concentrated on a small number of cogs, but are properly distributed in the longitudinal direction of the left and right belts around the center, and both load distribution functions in the longitudinal direction and width direction are rotating. In order to absorb excessive load and abnormal vibration.

Still another object of the present invention is to provide a cog belt in which such concentrated load does not concentrate on a part of the cogs, and at the start of the shifting operation, an excessive load is always dispersed by a large number of cogs. The idea is to come up with a reliable manufacturing method.

[0021]

According to the belt of the present invention, a plurality of cogs and grooves are alternately arranged in the width direction perpendicular to the longitudinal direction of the annular body, and the belt receives the buckling pressure from the contact surface of the pulley so as to be powered. In a transmitting belt, when a tension member having a core wire spirally or concentrically arranged and formed is arranged inside and / or outside the cog and expands and contracts in the belt width direction according to a buckling pressure from the pulley contact surface. At the same time, a high elasticity reinforcing member made of a metal material for maintaining buckling strength, and a low-viscosity resin material for tightly joining the high elasticity reinforcing member and the tensile member by integral molding, and the cog is A belt in which the elasticity in the belt width direction is selected based on a combined elastic constant of a high elasticity reinforcing member and the low-viscosity elastic resin material.

As another invention, in a belt manufacturing method, a plurality of cogs arranged at equal intervals in a width direction perpendicular to the longitudinal direction of the main body are integrally resin-molded with a viscoelastic material on an annular main body. In the belt manufacturing method, a first step of forming a core wire into an integral tensile body in advance, and a pulley contact pressure is previously applied to a metal elastic reinforcing body which has been subjected to a pretreatment for bonding a low-viscosity resin material. A second step of integrally applying a pressure receiving body to be received, a third step of storing the tensile elastic body of the first and second steps and the metal elastic reinforcing body corresponding to a plurality of cogs in an assembly mold, Forming the low-viscosity resin material in the mold inserted in the third step.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In this construction, a high elasticity reinforcing member is provided in each cog in the width direction of the belt, and viscoelasticity is maintained between low viscosity resin materials in all adjacent cogs in the longitudinal direction of the belt. Since the resin materials are integrally and closely connected to each other, sudden shock loads in both the longitudinal direction and the width direction and abnormal vibrations transmitted through the pulleys are successively transmitted to other cogs and the subsequent cogs. It acts to disperse properly and reliably in the cogs.

In particular, at the moment of shifting from the constant speed operation to the speed change operation, the contact radii r _A , r _B ...
_{As D} fluctuates in an arc shape and the contact radius increases,
There is an advantage that the impact load is dispersed very accurately by the action of the high elastic reinforcement body that expands and contracts in the belt width direction, and as a result, a phenomenon in which an abnormal impact load is concentrated on a small number of cogs can be prevented.

This means that even in the manufacturing method, belts having various transmission capacities can be obtained only by controlling the elastic modulus and mechanical strength of the elastic reinforcing member and the hardness of the elastomer which is a low-viscosity elastic resin material with respect to the transmission horsepower of the belt. I can deal with it. In particular, in the case of a metal elastic reinforcement, a bent portion is formed, and its metal material, its elastic modulus, spring constant, and the like can be arbitrarily and easily selected, and the amount of dispersion of an impact load can be appropriately designed accurately.

[0026]

【Example】

First Embodiment FIGS. 2 to 5 show a belt according to a first embodiment of the present invention. Each of the belts is an annular endless belt as shown in the belt of FIG. 1, but all of them are shown in a partial configuration for convenience of drawing.

FIG. 2 is a partial cross-sectional view in the longitudinal direction of the belt of this embodiment in a state of being wound around the pulley 2 of FIG. Rotation center C
Around the ₀ point, 1 and likewise arcuately plurality of cogs center points A, B, C, D and E are shown.

The belt 1 is formed by cogs 15 radially arranged at equal intervals with a main body 10 which is an annular continuous molded band. In the present embodiment, the inner cog 15a and the outer cog 15b form a pair in the cog 15, and both cogs 15 have the same radial direction lines a,
b, c, d... e. The main body 10 and the inner and outer cogs 15a and 15b are all integrally formed of a resin material. An upper groove 9a and a lower groove 9b are formed between adjacent cogs to form C _0.
Flexibility is given around the point.

FIG. 3 is a sectional view of the belt taken along line III-III in FIG. The inside of the main body 10 has a tensile body 13 in which a core wire 11 arranged in a helical or concentric manner is molded with a first resin material 12. In this embodiment, it is surrounded by a rubber layer 12 of a matrix material. Further, it is surrounded by a rubber layer 12 'of an orientation material of a reinforcing fiber for protection during molding. In this figure, a canvas material 19 is arranged, and a region of the canvas material 19 and the rubber layer 12 ′ is surrounded by a second resin body 17 of an elastic viscous elastomer,
The insides of a and 15b are molded by being injected under pressure with a viscoelastic resin material. The tensile member 13 does not necessarily have to be formed of the resin 12 in advance.

Here, the core wire 11 of the tensile member 13 is made of metal wire, glass fiber, aramid fiber, polyester fiber,
A rope made of polyamide fiber. However, the present invention is not limited to the rope, and may be a woven fabric or a composite knitted fabric. Furthermore, low viscoelastic first resin materials 12 and 12 ′ surrounding the core wire 11,
12 "is a single material such as natural rubber (NR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), nitrile rubber, hydrogenated nitrile rubber, chlorosulfanated polyethylene (hypalon) or the like. Rubber or polyurethane rubber obtained by appropriately blending these materials may be used.

The second resin material 17 of low viscoelasticity for press-molding each cog 15 is also made of the first resin material 12, 12 ', 1
Same as 2 ″, and is composed of a single material such as NR, SBR, CR, and Hypalon, or a reinforced resin in which short fibers such as cotton cloth, carbon fiber, and chemical fiber are mixed in a rubber matrix obtained by appropriately blending these materials.

FIG. 4 shows a highly elastic reinforcing member 21 of the embodiment of FIG.
FIG. 4 is an exploded view showing a structure of a connecting body 20 between the pressure receiving member 14 and an assembly procedure before molding. The connecting member 20 having the high elasticity reinforcing member 21 is vertically symmetrical and has the same structure as the inner connecting member 2.
0a, it is assembled in the direction of the arrow _h 1, _{h 2} to the state sandwiched tension member 13 by the outer coupling member 20b. The pressure receiving body 14 may be separate from the reinforcing body 21,
Hard resin other than metal may be used.

In the present embodiment, the inner and outer connectors 20a, 20
b are metal and the same part,
This will be described as a representative. In this embodiment, the high elasticity reinforcement 2
1a is a pressure receiving member 1 which receives a transmitted load from a pulley contact surface.
4a is formed of the same metal by integral processing.
A reinforcing plate 24a is provided inside 4a.

On the other hand, the high elasticity reinforcing member 21a has two bent portions 22a, 22a so as to exhibit sufficient elasticity with respect to a large load of, for example, about 2 to 3 TON, according to the transmission capacity.
Are formed, and three curved portions 23a respectively held by the connecting portions 25a are formed, and the bent portions 22a, 22a are further connected to the central connecting portion 26a.

Further, as the metal material of the high elasticity reinforcing member 21,
Spring steel, light alloys, etc. are used, but the properties required for these metal materials are proper mechanical elasticity, corrosion resistance, and adhesion to the elastomer. Is subjected to a preliminary treatment such as a chemical treatment or a mechanical treatment.

Normally, the mechanical treatment of metal and rubber materials includes:
In order to increase the area of the bonding surface with the rubber, sandblasting, known chemical etching, or surface spraying of, for example, zinc, brass, or the like is used, and the adhesive may be used while being applied in advance. As a chemical treatment, metal coating with brass (for example, about 70% copper Cu and about 30% zinc Zn) or plating of 100% zinc Zn is performed, and the resin materials 12 and 17 are made of cobalt, trimercaptotriazine (ZF). And an accelerator, etc., which can also promote the adhesion between the metal and the rubber layer.

The pressure receiving member 14a is preliminarily welded with a reinforcing plate 24a, and is provided with bent pieces 27a and 29a. The front end portion 28b of another reinforcing member 21b is sandwiched between the pressure receiving members 14a and firmly connected with an adhesive. Is done. The other end is connected in the same manner.

In this embodiment, as shown in FIG.
The rivets 16 are applied to the holes a and 21b via the elastic washers 18a and 18b. Further, in practice, the pressure receiving body 14 is previously provided with a block 30 having an arc-shaped outer side surface on the bonding surface 32 by press insert molding, and thereafter connected to the two connecting bodies 20a and 20b. In this case, only the block 30 formed in advance before finishing may be bonded, but in any case, the dashed line portion 33 is cut at a predetermined inclination angle at the time of finishing, and the contact surface 31 is polished.

FIG. 5 is an arrangement diagram of the finishing block 30 when bent to the minimum diameter of the belt of the embodiment. Each block 30 is bilaterally symmetric with respect to the center line in the radial direction, and has an arc-shaped abutment surface on the left and right side portions 34 and 35.
It is designed so that the minimum radius rmin of FIG.

[0040] At this time block 301a, 302b is in contact with abutment surface P _1, due to the contact radius r of the pulley and the belt is expanded, the abutting surface P ₁ gradually shifts to the outside, the speed operation all In the area, adjacent blocks are always in contact. As a result, the adjacent cogs 15 themselves cause abnormal vibration from the pulley surface and the adjacent cogs to each other in the vertical direction (width direction).
And it is positively suppressed in both directions in the lateral direction (longitudinal direction).

The material of the block 30 must have a high rigidity and a hardness of at least 90 ° (JISA). The material is made of a base such as hard rubber, hard polyurethane, nylon or the like, and carbon fiber, chemical fiber, metal fiber or the like. Reinforced resin mixed with short fiber group consisting of A liquid crystal resin, a phenol resin, an epoxy resin, or the like may be used as another base.

Next, the operation of the belt of the first embodiment shown in FIGS. 2 to 5 will be described with reference to FIG. FIGS. 6A, 6B, 6C and 6D are cross-sectional views showing the state of contact between the belt 1 and the pulley 2 at the contact points A, B, C and D as shown in FIGS. 1 and 2, respectively.

That is, as described with reference to FIGS. 1 and 2, at the moment when the state changes from the constant-speed rotation state to the speed-change rotation state, even if the belt 1 of this embodiment is used, as shown in FIG. The contact radii r _A , r _B , r _C , and r _D gradually increase from the center point C ₀ toward the point D from the center point C _0. It is not aggregated, and is approximately 90 degrees from point A in FIG. 6A to point C in FIG. 6C.
(4) In the wide area described above, the cogs 15 of the belt 1 and the pulley 2 can be reliably brought into contact.

[0044] This is during the 2, cogs 1 transmission load applied to the cog 15 is substantially angle 90 ° around the region around the rotation center point C ₀ counted from the point A in the figure the belt 1
This indicates that the cogs 15A, 15B, and 15C are appropriately dispersed in the order of 5A, 15B, and 15C, and that the cogs 15A, 15B, and 15C expand and contract in the belt width direction in proportion to the loads in the buckling directions.

At this time, the strength and elastic modulus in the buckling direction of each cog 15 are determined by the combined amount of the metal reinforcing member 21 and the resin material closely adhered to the periphery thereof.
Therefore, for example, the transmitted load of about 1 TON to several TONs is distributed almost uniformly to all the cogs 15 in contact with the radius R ₀ during the constant speed operation, but starts at the point A when the single-speed shift operation is started. As the applied load is larger, the amount of compression of the cog increases as the applied load increases, so that the subsequent cogs 15 disperse the load one after another and concentrate on a part. To block.

In this operation, it is actually impossible to measure the compression amount because it is instantaneously generated. However, the compression amount of the cog 15 on the contact surface having an angle of about 90 ° is a conceptual example. As shown in the outer peripheral view of each cog 15 in FIG. 2, for example, the compression amount of one contact surface of each cog 15 is A
0.2 mm at point, 0.12 mm at point B, 0.04 at point C
It is presumed that the state becomes 0 at mm and D points. Therefore, the amount of compression at the contact surfaces on both sides of each cog is almost twice as large.

Therefore, as a result, the transmitted load is dispersed almost in proportion to the contact radius. Even when an impact load due to an abrupt shift command is applied to the belt 1 of this embodiment during operation, the angle 9 is always and always approximately 9 degrees.
Since the plurality of cogs 15 around 0 ° are dispersed, the load is concentrated on a small number of cogs of one to two, and the belt 1 and the pulley 2 are not damaged by this.

As described with reference to FIGS. 3 and 4, the elasticity of the four bent portions 22 and the elasticity of the resin material surrounded by the connecting body 20 are provided on the inner and outer walls, as described above with reference to FIGS. Although it depends on the combination of both elastic properties of the action, the number of cogs to be expanded and contracted by buckling pressure at this time is
From the origin of the maximum compression amount of the point A about a rotational center C _0, at least the cogs in the contact area of about 40 ° in the angular region up to about 120 ° are dispersed stretch is desirable here.

On the other hand, in the longitudinal direction of the belt, all cogs 15 are integrally formed by the tensile member 13 and the resin member 17 and are continuously connected to each other. Therefore, abnormal vibration is generated as buckling pressure from the pulley. Even when superimposed on the transmitted load,
In the same way as the concentrated load is absorbed by the elasticity of the cog, this abnormal vibration is also generated along the tensile member 13 and the resin material 17 in the longitudinal direction. Instantaneously disperses and suppresses vibration.

The rivet 16 is a protection means for preventing the metal reinforcing body 21 from peeling off. The rivet 16 is made of a resin material or metal which expands and contracts to a certain extent in the tensile direction. In the case of metal, elastic washers 18 are arranged at both ends. In addition, the elasticity of the metal reinforcing body 21 and the resin body 17 is guaranteed.

In the above description, the contact state between the belt 1 and the pulley 2 on the right half surface 2R of the driven pulley 2 in FIG. 1 has been described.
However, exactly the same phenomenon has occurred. Therefore, FIG. 1 shows contact points corresponding to the contact points r _{A to} r _E on the driven side, and an arc-shaped trajectory having contact radii r ′ _A , r ′ _B , r ′ _C , r ′ _D of the contact points on the drive side. The description will be omitted.

[Second Embodiment] FIGS. 7A and 7B are longitudinal and transverse sectional views of a belt according to a second embodiment of the present invention. Only differences from the first embodiment will be described.

The first difference is that a bellows having a predetermined elastic constant is used for the high elastic reinforcing member 21 and the metal semi-circular arc or semi-elliptical bellows 21 is provided on the outer side so that an arbitrary elastic coefficient can be freely selected. Secondly, the belt 1 is formed by integrally forming the bellows 21 after the block 30 of the pulley contact surface is insert-molded together with the metal receiving portion 36 in advance. This is in that the cog 15 is retrofitted to the pressure receiving ends 15c and 15d.

Third Embodiment FIGS. 8A and 8B are longitudinal and transverse sectional views of a belt according to a third embodiment of the present invention. The difference between the first and second embodiments is that firstly, a belt base 7 having a width L as shown in the figure is cut in advance into a circular section from a drum or sleeve shape, and thereafter, Base 7
The pressure receiving body 30 is attached to the portions on both sides of the cut surface 8 by post-processing by welding or bonding.

Second, the bellows 23 has a circular or elliptical cross section.
Is used as a high elasticity reinforcement body 21 having a high elasticity constant,
A support member 24b of a hard resin material for preventing the bellows from bending and a resin material 17 of a normal rubber layer are inserted in advance. The inner and outer coatings 4 of the belt base 7
5, a canvas 4 such as a polyester fiber, a metal wire knitted cloth, etc.
6 is protected by a sheet-like coating of resin.

[Fourth Embodiment] FIGS. 9A and 9B are longitudinal and transverse sectional views of a belt according to a fourth embodiment of the present invention. The difference from the first, second and third embodiments is that the pressure receiving member 14 of the belt 1 is exposed to metal and is in direct contact with the pulley surface, so that the belt is transmitted in an oil tank, that is, for a so-called wet type. is there.
Therefore, a hard resin block is not applied.

Secondly, a metal spring 23 having a rectangular cross section is used for the high elasticity reinforcing body 21, and a hard resin material 24 for preventing bending and a low viscoelastic resin body 17 are injected into the inside similarly to the third embodiment. Have been. In addition, the low-viscosity resin material absorbs at the interval 37 with respect to the expansion and contraction of the pressure receiving body 14 in the width direction.

Third, the pressure receiving members 14a and 14b are formed of a metal integral with the back reinforcing member 39 of another high elastic reinforcing member 21 ', and cover the rear surface of the outer cog 15b. Therefore, when the pressure receiving members 14a and 14b are pressurized, the back reinforcing member 3
Reference numeral 9 denotes an arm bent and compressed together with the spring-shaped reinforcing member 23.

The pressure receiving member 14 and the spring 23 as the metal plate reinforcing member 21 are connected to each other by welding. Also metal plate 3
In addition to more aggressively imparting flexibility to ensure the elasticity of No. 9 and maintaining the weight balance of the inner and outer cogs of the annular belt due to the asymmetric cross-sectional shape of the upper and lower cogs around the tension band 13. In the meaning, an inclined portion 43 is formed, and the same resin material 15 is filled therein.
The left and right pressure receiving members 14 may be easily expanded and contracted with 1 as a fulcrum. Further, as a means for ensuring the weight balance, a heat sink for heat dissipation during operation may be provided on the back of the belt.

[Fifth Embodiment] FIG. 10A is a view similar to FIGS.
FIG. 4 is a block diagram illustrating a belt manufacturing method according to the first embodiment. That is, a step 51 in which a known surface treatment is applied to the core wire 11 and the core wire 11 is assembled in a spiral shape, and the core wire 11 is
In step 52, the tensile member 13 is formed in advance. Then, in parallel, as described above, a step 53 of performing a pre-treatment on the surface of the metal reinforcing body 21 to improve the adhesiveness with the resin material 18.
After that, the mold having the shape shown in FIG. At this time, the pressure receiving body 14 is formed as a step 55.

Subsequently, the combined body 20 of the formed metal reinforcing body 21 and the pressure receiving body 14 is assembled on the annular tensile body 13 in step 56 as shown in FIG. Install the array. Next, insert molding using the low-viscosity resin material 17 is performed for each single belt in step 57.

Finally, in step 58 a number of cogs 15
After the completion of the annular belt forming integrally with the pressure receiving body 14, a cutting process is performed to obtain an inclination angle of the block 30 in which an angle corresponding to the inclination angle of the pulley is applied to the pressure receiving body 14 in advance. The tensile member 13 does not necessarily require molding of a resin material in advance, and if the core wire 11 is flexible in the direction of the center of rotation,
For example, the core wire 11 may be resin-molded directly in step 57 as a knit or an assembly.

FIG. 10B shows the belt manufacturing method shown in FIG. 10A with some modifications.
May be used for the production of The belt 1 of the second embodiment is shown in FIG.
Although it can also be manufactured by the manufacturing method of 0A, here, a slightly modified portion will be described with reference to FIG. 10B, and the description of the other portions will be omitted.

That is, in the second embodiment shown in FIG. 7, two types of inner and outer bellows-like metal reinforcements 1 and II are used. At the same time as molding, insert molding is executed in advance in step 63. Other points are the same manufacturing steps as those in FIG. 10A. In this case, the cost increases because the insert molding process is required twice, but accurate molding is possible.

[Sixth Embodiment] Next, FIG. 11 shows the third embodiment of FIG.
It is a block diagram showing a belt manufacturing method of an example. Fifth
The difference from the fifth embodiment is that the manufacturing method of the fifth embodiment is different from the belt 1 in the first embodiment.
On the other hand, in the manufacturing method of FIG. 11, a plurality of belt bases 7 of FIG. 8 are simultaneously formed into a single sleeve at a time. The belt base 7 is formed into a circle.

In addition, a metal pressure receiving body 8 preliminarily provided with a hard resin block 30 is provided on the belt base 7 in step 77.
Is formed by welding or bonding with the metal reinforcing members 23 on both sides in step 78 by post-processing after forming. Thereafter, in step 79, the rectangular block 30 is subjected to cutting and polishing at an inclination angle suitable for the pulley inclination angle. This manufacturing method is inexpensive and suitable for mass production. The pressure receiving member 14 and the reinforcing member 23 can be applied to the spring-like reinforcing member 23 of the fourth embodiment shown in FIG. The description of the example belt manufacturing method is omitted.

Further, in this manufacturing method, the canvas 45
a can be applied at a low cost, and a mesh in which a fine or hard metal wire is knitted on the upper and lower sides of the belt base 7 in FIG. By applying the mesh in the radial direction as in the case of a radial tire of an automobile, a deformation phenomenon such as twisting or twisting in an irregular tension state can be suppressed.

[Other Embodiments] It is easy for those skilled in the art to partially apply the technical ideas of the above four embodiments to other embodiments. Furthermore, various modifications other than the above-described embodiment are possible within the scope of the claims of the present invention. For example, in the embodiment shown in FIG. 8 or FIG. 9, an example is described in which the inside of the bellows type or spring type high elastic reinforcing material 23 is filled with a resin material in advance. May be.

Further, in addition to the above-described embodiment, various changes can be made in accordance with the power transmission capacity, such as the shape, structure, type of metal material, elastic coefficient, and surface treatment of the high elasticity reinforcing member 21. For example, it is natural to provide a difference in elastic modulus between the inner reinforcing member 23a and the outer reinforcing member 23b in advance.

At the same time, the cogs of the belt of the present invention can be measured independently, and the overall elastic modulus is selected by synthesizing with the resin material filled between the pressure receiving members. Should be selected.

Further, the belt manufacturing method can be similarly changed to various states, and this case is also included in the present invention within the scope of the claims. For example,
In the embodiment of FIG. 7, the resin material 17 in the region surrounded by the tensile member 13 and the inner reinforcing member 24 is replaced with the resin material 1 of the tensile member 13.
It is also possible to make a change such as forming an annular shape integrally with 2 in advance. Also, a plurality of tensile members 13 may be installed,
May be used as a band-shaped metal material.

[0072]

According to the belt of the present invention, since a plurality of cogs are all provided with the metal high elastic reinforcing members which can expand and contract in the belt width direction, when shifting from constant speed operation to shift operation. However, even if the transmitted load is applied to only a small number of cogs, the compressibility in the belt width direction disperses instantaneously to adjacent cogs, and when adjacent cogs are compressed, successive cogs follow one after another. As a result, a sudden concentrated load is not applied to some cogs, so that it is possible to avoid partial destruction of some cogs, and as a result, the durability and reliability of the belt are significantly improved.

Further, the elastic modulus of each cog can be measured as the elastic modulus of the pressure receiving member at both ends of the cog, but it is determined by the combination of a high elastic reinforcing material made of a metal material and a low viscoelastic resin material filled around the reinforcing material. Since the combined elastic coefficient is obtained, the transmission capacity of the belt itself can be counted and managed only by changing the respective elastic coefficients of the two members. This means that there is an extremely excellent effect on the mass productivity of the belt of any specification according to the transmission capacity of the belt transmission.

In particular, a similar phenomenon occurs not only at the start of the shift operation, but also at a sudden load change. In this case, an irregular and abnormally large vibration is received from the load side,
Even with this sudden and shocking vibration, each cog is integrally formed with low-viscosity resin material between adjacent cogs, and the high-elastic reinforcing body that receives this shock vibration from the pressure receiving body is a low-viscosity resin. Since the body is in close contact with the body, the vibration is transmitted through the low-viscosity resin material and is immediately dispersed in the longitudinal direction of the belt from adjacent cogs in front and rear to subsequent cogs one after another.

This means that even when high load transmission is required, the function of dispersing the impact load and the impact vibration in both the longitudinal direction and the width direction of the belt positively acts, and particularly, the dispersion amount thereof. There is an advantage that the dispersion ratio can be controlled by selecting the elastic constant of the high elastic reinforcement and the hardness of the low-viscosity resin material to be filled.

Therefore, for example, the minimum contact radius r _A during shifting
Has the advantage that the cog quantity can be arbitrarily dispersed at least in an angle region of at least approximately 40 ° to 120 ° around the pulley rotation center point C ₀ from the starting point. With this design, the transmission capacity as the pulley transmission device and There is an effect that the durability can be freely adjusted.

Further, when applied to a general speed change pulley,
On the driven pulley, the contact radius is small in the high speed range and the contact circumference is short, but in the low speed range, the contact radius is large and the contact circumference is long, so in the belt of the present invention, the unit added to the contact area of the cog Even if a large pressure is applied to the buckling pressure of the cog per area, a reliable strength can be guaranteed, which means that a large transmission capacity in a low speed range can be accurately increased and secured. Therefore, as long as the pulling pressure is increased by the hydraulic drive or the like, the clamping pressure is increased as the driving speed is reduced. It has become.

[Brief description of the drawings]

FIG. 1 is a principle explanatory view showing a belt operation state of a general variable diameter pulley transmission.

FIG. 2 shows a longitudinal direction II of the belt according to the first embodiment of the present invention.
It is a II sectional view taken on the line.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an exploded perspective view showing an assembled state of a tensile member and a high elasticity reinforcing member used in the embodiment of FIG. 2;

FIG. 5 is a partial front view showing a state at the time of a minimum radius of the block used in the embodiment of FIG. 2;

6A to 6D are operation explanatory diagrams illustrating the operation and effect of the embodiment belt of FIG. 2, and FIGS. 6A to 6D are operation explanatory diagrams at contact points A to D with a pulley shown in FIGS. 1 and 2, respectively.

7A and 7B show a belt according to a second embodiment of the present invention. FIG. 7A is a longitudinal sectional view, and FIG. 7B is a transverse sectional view.

8A and 8B show a belt according to a third embodiment of the present invention. FIG. 8A is a longitudinal sectional view, and FIG. 8B is a transverse sectional view.

9 shows a belt according to a fourth embodiment of the present invention. FIG. 9A is a longitudinal sectional view, and FIG. 9B is a transverse sectional view.

10 is a block diagram showing each step of a first embodiment of the belt manufacturing method of the present invention, FIG. 10A is a manufacturing method of the first embodiment of FIG. 2, and FIG. 10B is a second embodiment of FIG. It is an example manufacturing method.

FIG. 11 is a block diagram showing each step of a second embodiment of the belt manufacturing method of the present invention.

12 is an operation explanatory view showing a belt state when a conventional high load transmission belt is applied to the principle of the transmission of FIG. 1, and FIGS. 12A to 12D show points A to D of FIG. 1, respectively.

[Explanation of symbols]

 Reference Signs List 1 belt 2 pulley (driven) 2a, 2b disk 3 block piece 4a, 4b ring 5 pulley (drive) 7 belt base 10 main body 11 core wire 12 rubber layer 13 tensile member 14 pressure receiver 15 cog 15a, 15b inner and outer cogs Reference Signs List 16 rivet 17 rubber layer or low-viscosity resin material 18 elastic washer 19 canvas material 20 connecting body 21 high elastic reinforcing body 22 bent part 23 curved part 24 reinforcing plate 25, 26 connecting part 27 bent piece 28 tip part 29 bent piece DESCRIPTION OF SYMBOLS 30 Block 31 Contact surface 32 Joining surface 33 Cutting part 35, 34 Side part 36 Insert fitting 37 Gap part 38 Cloth material covering 39 High elastic reinforcement 40 Bellows

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29K 105: 08 B29L 29:00

Claims (7)

[Claims] 1. A belt in which a plurality of cogs and grooves are alternately arranged in a width direction perpendicular to a longitudinal direction of an annular body and which transmits power by receiving buckling pressure from a pulley contact surface, wherein a core wire is a spiral wire or A tension member formed concentrically in an array, and a metal disposed inside or / and outside the cog for expanding and contracting in the belt width direction in accordance with a buckling pressure from the pulley contact surface and for maintaining buckling strength. And a low-viscosity resin material for tightly joining the high-elasticity reinforcing member and the tensile member by integral molding, and the cog is formed of the high-elasticity reinforcing member and the high-elasticity reinforcing member according to the transmission capacity. A belt in which the elasticity value in the belt width direction is selected based on the combined elastic modulus of the low-viscosity elastic resin material. 2. The belt according to claim 1, wherein a pressure receiving body for transmitting buckling pressure from a pulley contact surface directly to the high elasticity reinforcing member is disposed on both side end surfaces of each of the cogs. 3. The belt according to claim 2, wherein each of the cogs is formed as a pair inside and outside the main body, and the pressure receiving body is a metal material and is formed integrally with the high elasticity reinforcing body. Become a belt. 4. The belt according to claim 1, wherein each cog is provided with a hard resin block on both sides on the pulley contact surface side, and the block side surface between the cogs adjacent to each other is formed. A belt which is formed in an arc shape and whose arc-shaped side surfaces are in contact with each other at any position during a shift operation. 5. The belt according to claim 1, wherein the highly elastic reinforcing member is formed by applying a metal surface treatment to a surface in close contact with the low-viscosity elastic resin material. 6. A method of manufacturing a belt in which a plurality of cogs arranged at equal intervals in a width direction perpendicular to a longitudinal direction of the main body are integrally formed with a viscoelastic material on an annular main body,
The first step of forming the core wire into an integral tensile body in advance, and the pressure receiving body that receives the contact pressure of the pulley in advance on the metal elastic reinforcing body that has been pretreated to adhere the low-viscosity resin material A second step of applying, a third step of storing the tensile member and the metal elastic reinforcement corresponding to a plurality of cogs in the first and second steps in an assembly mold, and inserting the third step. And a fourth step of molding the low-viscosity resin material in a mold. 7. A method of manufacturing a belt, wherein a plurality of cogs arranged at equal intervals in a width direction perpendicular to a longitudinal direction of the main body are integrally resin-molded with a viscoelastic material on an annular main body.
First to form the core wire into an integral sleeve-shaped tensile body in advance
A plurality of metal elastic reinforcements which have been subjected to a process and a pretreatment for bonding a low-viscosity elastic resin material are attached to the sleeve-shaped tensile member corresponding to each of the cogs and housed in a sleeve-shaped mold. A second step of molding with a low-viscosity resin material, a third step of slicing the sleeve-shaped molded article molded in the second step, and a pulley contact portion of each cog of the singulated belt base A method for manufacturing a belt, wherein the belt is subjected to post-processing for connecting a pressure receiving member to the metal elastic reinforcing member.