JPH0534341U - Poly V Block Belt - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose of this invention is to efficiently transmit a larger torque with a compact device and prevent the belt from overturning or cutting. [Structure] An upper block 5 and a lower block 6 are fixed to a center belt 4 by a fastening material 8, and a V groove in the belt longitudinal direction is provided on the lower surface of the lower block 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a block belt, and more particularly to a block belt aiming at transmission of higher torque.

[Prior Art]

Conventionally, a block belt in which a block is fixed to a center belt has been proposed as a belt for transmitting a torque higher than that of a belt made of an elastomer such as rubber or urethane. In this block belt, an upper block and a lower block are arranged on a center belt having convex portions on both upper and lower sides so that the upper block and the lower block are fitted to the convex portions, and through holes are formed in the center belt and the upper and lower blocks to form rivets and bolts. It is fixed through a fastening material.

The structure in which the blocks are fixed in this way enables transmission of torque higher than that of the conventional belt. However, even such a belt cannot be transmitted by one belt, and it may be necessary to transmit a larger load. In that case, a method is used in which the load is distributed by transmitting multiple block belts, as is the case with general elastomer belts.

[0004]

[Problems to be solved by the device]

 However, it is possible to transmit a higher torque by using it by multiplying it, and the purpose of responding to a high torque can be achieved, but there are multiple pulleys and each block has its own independent block. Since the belt is wrapped around the belt, the problem that the belt overturns while the belt is running, and the subtle differences in the circumferential length of multiple belts interfere with each other and reduce the transmission efficiency. There was a problem. There is also the problem that the size of the device will naturally be larger than when one belt is used.

Further, if the circumferential lengths of the plurality of belts are different, even if a plurality of belts are used, not only is it an inefficient transmission device that does not provide a transmission capacity of multiple times, but also one of the This will lead to early cutting of the belt.

Therefore, according to the present invention, not only high torque can be transmitted, but also the belt does not overturn, and there is no interference between the belt members due to the different circumferential lengths of the plurality of belts. In addition, it is possible to make the device small compared to the magnitude of the torque that can be transmitted, and it is possible to prevent the belt from being cut because the force is applied only to a part of the belt around which the belt is wound. The purpose is to provide a belt.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention embeds a core wire with low elongation and high strength in a spiral shape in an elastomer, and a top and bottom center belt having a ridge or a recess at a predetermined pitch on at least one surface. In a belt in which blocks are fitted and fixed to the convex strips or recesses of the center belt on both sides, the lower block is provided with a slope that abuts against the V pulley on the side surface of the belt and the belt is on the lower surface. It is characterized by having at least one V-groove along the longitudinal direction. Further, the lower block includes a plurality of trapezoidal cross-sections arranged side by side in the belt width direction.

[0008]

[Action]

 The poly-V block belt of the present invention has a V-groove on the lower surface of the lower block in the belt longitudinal direction, and each of the V-grooves is fitted into a plurality of pulley grooves to transmit power more than a conventional belt. The ability is high, and it is caused by the overturning of the belt and the difference in the circumferential length of each belt, which is a problem that occurs when winding one independent belt when running around a pulley with multiple grooves Interference between the belts can be prevented, and comparing the strength in the length direction of the belts, the center belts are more uniform as in the present invention than the center belts are plural as in the case of using plural belts. It can be said that the block belt of the present invention is stronger because the block is divided into blocks so that the core wire in the center belt is not cut. Moreover, the transmission as a whole is more compact than the conventional multiple belts used, and there is no problem that the power transmission efficiency is poor due to the difference in the circumferential length of the multiple belts.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an example of the present invention. A high load transmission belt 1 of the present invention transmits a high load to an upper surface and a lower surface of a center belt 4 in which a core wire 3 is embedded in an elastomer 2. In order to achieve this, the belt is provided with an upper block 5 and a lower block 6, respectively, to enhance rigidity and lateral pressure resistance.

As the elastomer 2, NR (natural rubber), SBR (styrene-butadiene rubber), CR (chloroprene rubber), NBR (nitril rubber), hypalon (chlorosulfonated polyethylene), HNBR It is a single material of rubber such as (hydrogenated nitrile rubber) or a rubber compound made of a blended material thereof, or a polyurethane resin.

As the core wire 3 embedded in the center belt 4, a rope tensile member having low elongation and high strength made of glass fiber, aramid fiber, polyamide fiber, polyester fiber, metal wire or the like is used.

The upper and lower blocks 5 and 6 are blocks having slopes on their side surfaces that abut against the pulley wall surface, and have higher rigidity than the center belt, specifically, hard rubber having a hardness of 90 ° or more, and hard polyurethane resin. , Liquid crystal resins, phenolic resins, epoxy resins, polyamide resins, polyester resins, acrylic resins, methacrylic resins, etc., or short fibers consisting of cotton threads, chemical fibers, glass fibers, metal fibers, etc. in these resins. It consists of a reinforced resin mixed with.

Next, when arranging the upper block 5 and the lower block 6 on both surfaces of the center belt 4, the contact surfaces of the center belt 4, the upper block 5, and the lower block 6, that is, both surfaces of the center belt 4, are arranged. On the other hand, on the contact surfaces of the upper block 5 and the lower block 6 with the center belt 4, there are concave grooves 5a closely fitted to the convex stripes 4a and 4b. , 6a are formed respectively to prevent the upper block 5, the lower block 6 and the center belt 4 from being displaced in the longitudinal direction of the belt. In this structure, the ridges and the recesses may be reversed, and even if the ridges are provided on the block side and the recesses are provided on the center belt 4 side, the upper block 5, the lower block 6 and the center belt 4 are fitted. The positional deviation of can be regulated. Further, even if such a concave-convex fitting structure is provided on only one of the upper and lower blocks, there is no inconvenience in implementing the present invention.

Then, the block 6 as the upper block 5 and the center belt 4 are arranged at predetermined positions, through holes are formed in each of the divided parts, and they are fixed by fastening members 8 such as rivets and bolts. It The lower block of the upper and lower blocks has a V-shaped groove 6b in the longitudinal direction on the lower surface, and has a shape that is divided into two in the width direction with respect to one center belt 4. Such a belt is wrapped around a pulley 10 having two grooves as shown in FIG. 2 to transmit power, and a portion of the lower block V groove 6b which is in contact with the pulley 10 is conventional. Compared to the power transmission in the belt, it is possible to transmit more power.

FIG. 3 shows another example of the present invention, in which the upper block 15 is arranged on the upper surface of the center belt 14 and the two lower blocks 16, 17 are arranged on the lower surface. Then, on the contact surfaces of the center belt 14, the upper block 15, and the lower blocks 16 and 17, there are formed convex ridges and concave grooves that closely fit the convex ridges, respectively, as in the previous embodiment. The positions of the upper block 15, the lower blocks 16 and 17, and the center belt 14 in the longitudinal direction of the belt are not displaced.

Then, the upper block 15, the lower blocks 16 and 17, and the center belt 14 are arranged at predetermined positions, through holes are formed, and they are fixed by fastening members 18 such as rivets and bolts. Of the upper and lower blocks, two lower blocks 16 and 17 are arranged in the width direction with respect to one center belt 14, and two rows of lower blocks are arranged in the longitudinal direction. A V groove 16b is formed by the two blocks 16 and 17.

Such a belt is also wound around the pulley 20 having two grooves as shown in FIG. 3 to transmit power, and the pulley 20 is provided between the two rows of lower blocks 16 and 17. The number of parts that are in contact with is increased compared to the conventional belt transmission, and more power can be transmitted.

[0019]

[Experimental example]

 Is the torque transmission capacity of the belt of the present invention as described above better than that of the conventional belt? Apply various torques to the belt of the present invention and the conventional belt having the same belt width as the belt of the present invention. The slip ratios of the belts were compared when running with the same torque applied. The experimental conditions are as follows.

The belt used as an example of the present invention is the latter of the two examples shown above, and thus the latter is a 30 mm width in which an elastomer made of a composition mainly composed of chloroprene is spirally embedded with a core made of aramid. An upper block made of epoxy resin reinforced with polyester woven cloth is placed on the upper surface of the center belt of, and lower blocks made of the same material as the upper block are placed in two rows on the lower surface of the center belt. Use a rivet to fix the upper block, lower block and center belt, and change the drive pitch diameter Φ70, 3200 rpm, and the torque at several points between 0 kg ・ m and 7 kg ・ m to determine the slip ratio. It was measured. As a comparative example, an upper block and a lower block made of the same material are used for the same center belt, but the lower block has the same width as the belt width and the lower block has a trapezoidal cross section in one row. The slip ratio was measured in the same manner. The result is shown in FIG.

As shown in FIG. 4, the belt of the present invention has a smaller slip ratio when transmitting torque of the same magnitude as compared with the conventional belt. Therefore, the belt of the present invention has the same width. It can be seen that the transmission capacity is larger than that of the conventional belt.

Further shown in FIG. 5 is another embodiment of the poly V block belt of the present invention. This belt 21 has a lower block 26, 27, 28 in three rows and a pulley having three grooves. It is used by winding it around 29. Also, unlike the above embodiment, three lower blocks 26, 27, 28 are arranged in the width direction and three upper blocks 23, 24, 25 are arranged in the width direction. The upper block and the lower block are arranged in three rows on each of the inner and outer surfaces of the center belt 22.

A large torque can be efficiently transmitted by adopting a structure in which three rows are arranged. Further, as shown in this embodiment, the upper block may be arranged in a plurality of columns like the lower block, instead of being arranged in one column. The blocks provided on one center belt are not limited to the two rows and the three rows shown in the above embodiment, but may be arranged in a larger number of rows.

[0024]

[Effect of the device]

 The poly-V block belt of the present invention has a structure in which at least a plurality of lower blocks are arranged and fixed to one center belt in the belt width direction, and the belt is a block having a plurality of rows in the longitudinal direction of the center belt. Are lined up. The poly V block belt having such a structure is wound around a pulley having a plurality of grooves to transmit power, and has a belt of the same width as the conventional block belt having only one row of blocks. However, more torque can be efficiently transmitted, and this is a problem that occurs when winding an independent belt when winding around a pulley with multiple grooves and running it. It is possible to prevent overturning of the belts and interference between the belts due to the difference in the circumferential length of each belt. Comparing the strengths in the length direction of the belts, the center belt is used more than the center belt as compared with the present invention. It can be said that the block belt of the present invention is stronger because the one core belt and the plurality of blocks do not cut the core wire in the center belt.

Further, the transmission as a whole becomes more compact than the conventional use of a few sub-belts, and there is no problem that the power transmission efficiency is poor due to the difference in the circumferential length of the plurality of belts. .. A transmission device can be made more compact than transmission by winding multiple block belts around multiple pulleys, and a block belt that can transmit a larger torque than an elastomer belt that contains a core wire It is possible to provide a belt that further enhances the capacity and leads to compactness.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of a poly V block belt according to the present invention.

FIG. 2 is a cross-sectional view of the poly-V block belt shown in FIG. 1 wound around a pulley.

FIG. 3 is a cross-sectional view of another poly V block belt according to the present invention wound around a pulley.

FIG. 4 is a graph showing a comparison of slip ratio with respect to torque of a poly V block belt of the present invention and a conventional belt.

FIG. 5 is a cross-sectional view of a poly V block belt according to another embodiment of the present invention, which is wound around a pulley.

[Explanation of symbols]

 1 Poly V Block Belt 2 Elastomer 3 Core Wire 4 Center Belt 5 Upper Block 6 Lower Block 6b V Groove 7 Lower Block 8 Stopping Material 10 Pulley 11 Poly V Block Belt 14 Center Belt 15 Upper Block 16 Lower Block 16b V Groove 18 Stop Dressing 21 Poly V block belt 22 Center belt 23 Upper block 24 Upper block 25 Upper block 26 Lower block 27 Lower block 28 Lower block

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Mitsuo Ishikawa 4-1-21, Hamazoe-dori, Nagata-ku, Kobe City Mitsusei Belt Co., Ltd. (72) Isao Koyama 4-1-21- Hamazoe-dori, Nagata-ku, Kobe Mitsuboshi Belting Co., Ltd. (72) Inventor, Yasutoshi Hosokawa 4-1-21, Hamazoe-dori, Nagata-ku, Kobe Mitsuboshi-belt Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A center belt having a low elongation, high strength core wire spirally embedded in an elastomer and having a convex portion or a concave portion at a predetermined pitch on at least one side, and blocks on both lower and upper surfaces of the center belt. In a belt that is fitted and fixed to a convex portion or a concave portion, the lower block has a slope that abuts against the V pulley on the surface that becomes the belt side surface, and at least the V groove along the belt longitudinal direction on the lower surface. A poly-V block belt characterized by having one. 2. A center belt having a low elongation, high strength core wire spirally embedded in an elastomer, and having convex ridges or concave portions at a predetermined pitch on at least one surface, and blocks on both lower and upper surfaces of the center belt. In a belt which is fitted and fixed to a convex portion or a concave portion, the lower block has a plurality of trapezoidal cross sections in the width direction arranged side by side in the belt width direction,
A poly-V block belt having V-grooves formed between the lower blocks.