JPS6049151A - V belt - Google Patents

Abstract

PURPOSE:To increase transmission capacity by fitting each tensile belt into a groove formed on both sides of a block so that a part of the belt is projected a little from each side, in a V-belt in which a plurality of blocks are incorporated in a pair of endless tensile belts. CONSTITUTION:The V-belt 1 is composed of a pair of endless tensile belts 2, 3 and a plurality of blocks 4 disposed adjacent each other to these tensile belts 2, 3. The tensile belts 2, 3 are made of non-extensible cores 7 arranged in the same plane and rubber members 8, 9 in which woven clothes 10, 11 are buried in upper and lower faces holding the cores 7, and their external side faces 2a, 3a shall be inclined faces coincident with the groove angle of a pulley. The tensile belts 2, 3 are fitted into the grooves 5, 6 formed on the inclined faces 4a, 4b of the blocks 4 made of hard rubber so that they are projected a little from the grooves 5, 6, and both sides faces 2a, 4a and 3a, 4a become even when they engage with the pulley groove.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a V-belt used primarily in vehicles such as automobiles.

Generally, gear type transmissions and hydraulic type transmissions are known as transmission devices for adapting engine output characteristics to required driving characteristics in automobiles. A gear type transmission has a stepped variable speed, and has a problem in operability because the gear change operation is performed in conjunction with a clutch device of a separate system. On the other hand, hydraulic transmissions are usually called torque converters, and are extremely easy to operate because they are continuously variable and can be operated without a clutch, and have recently been on the rise. On the other hand, it has the drawbacks of greater transmission loss and lower fuel efficiency than the gear type.

Furthermore, in recent years, belt-type continuously variable transmissions have attracted attention as a transmission device with excellent operability and good fuel efficiency, and are being researched by automobile manufacturers and transmission manufacturers.

There are two types of belt-type continuously variable transmissions:
One is a wet type transmission that uses a metal V-belt (e.g. Jitsuka Sho, S, 2-/JJ7), and the other is a dry type that uses a rubber V-belt (e.g. Jitsukasho, S, 2-/JJ7). transmission. In addition, when using a metal V-belt, a wet type is used because the material of the boob used for belt transmission is a metal material such as copper phase, casting, or aluminum alloy. It is one of the ingredients that must be used in lubricating oil to prevent wear and tear on friction surfaces.

On the other hand, if a rubber V-belt is used, it is not necessary and can be used dry.

By the way, the ratio S (=
-) Lt standard V-belt i koitei /, z ~ ot♂te [ On the other hand, the V-belt for high torque transmission is /, / ~ /
, 2. As shown in FIGS. 7 and 2, the smaller the ratio S, the smaller the buckling deformation of the belt when it is wound around the pulley, and the more reliable the six helically sprung bodies are supported. In addition, in Fig. 7 and Fig. 2, alla2 is a V-belt, bl, b2 are six bodies, (4, 02 are pulleys, V-bell in Fig. 2) a2 is the ■bell in Fig. 7)
The ratio S is larger than al.

In addition, as is clear from the following equation (1), the first step in designing a belt transmission with a large gear ratio is (second
(see figure), it is necessary to increase the change in the rotation pitch diameter of the belt f of the pulleys q and h on the driving side and the driven side.

ka: Gear ratioHere, in the case of a transmission in which the drive side pulley diameter is smaller than the driven side boolean diameter, the belt upper width (W) and thickness [) are determined by the drive side pulley and are expressed by equation (2). (See figure S10).

tp W=ΔW+(DPl dpl-1-, 2t) tan7
(2) ΔW: Amount of margin in the top width due to belt wear, etc. By the way, in a pulley with a predetermined groove angle, the possible change in pitch diameter is determined by the belt top width and thickness. When designing a belt transmission, is it necessary to increase the ratio of the top width of the belt to its thickness?

Incidentally, the ratio of the upper width to the thickness of the speed change belt is 2.0 or more (usually 3.0 to g, θ).

However, as the upper width of the belt increases, the belt is wrapped around the pulley, resulting in buckling deformation of the belt ff1t 5max (
Because the width of the belt is approximately proportional to the third power of the belt width (see Figures 7 and 2), the load distribution of the six belt width belts becomes extremely small in the center, which reduces the load torque support capacity. decreases.

On the other hand, belt-type transmissions used as automobile transmissions require extremely high torque transmission capacity.
The transmission torque required is several times that of a transmission bell for general industrial use.

First, conventionally, the transmission mechanism of belt-type transmissions uses springs, hydraulic pressure, etc. to apply surface pressure between the belt running surface and the bobbin, and this surface pressure generates frictional force to transmit load torque. Therefore, the surface pressure and the transmission torque are almost proportional, so for an engine of about 100cc, the value of θ is usually around 1g7cm2. However, the surface pressure required for general industrial speed change belts is
Jkg/cm2, and currently a speed change belt (rubber V-belt) that can withstand 7cm/Q kg/2 turns has been put into practical use, but it is not sufficient. Incidentally, it is known that the projector MV belt is composed of a carrier made by stacking multiple endless steel belts and multiple metal blocks with carrier guides and sloped surfaces on both sides, but the pulley components are Because of the metal thorns, oil lubrication is required, making the equipment complex and costly.Also, since the coefficient of friction between metals in oil is small, high-surface sweat is required for each load torque transmission. Since it is necessary to increase the pressurizing thrust of the speed change boob, there is a problem that the shaft load increases and the life of the bearing etc. is shortened.

-1: Since the belt weight is large, centrifugal force increases,
Since the impact when the belt is cut is large, there is a safety problem and it is difficult to replace the belt.

The present invention has been made in view of this point, and the above-mentioned rubber V
DESCRIPTION OF THE PREFERRED EMBODIMENTS To provide a V-belt suitable for high-load applications that eliminates the problems of belts and metal V-belts.The configuration of the present invention will be described below with reference to embodiments with reference to the drawings.

As shown in FIGS. 1 and 2, the V-belt 1 according to the present invention includes a pair of tension members 2, 6, and a plurality of tension members 2.6 arranged without gaps in the length direction of the tension members 2. Block 4 of
It is composed of.

Block 4 is θ, 3 with respect to the dry surface of metal such as cast iron or steel.
A non-metallic material Fl such as plastics or hard rubber having the above kinetic friction coefficient, which has a large friction coefficient and excellent wear resistance, is used.

The side surfaces 4d and 4b of the block 4 are inclined to form a belt angle α matching the groove angle of the speed change boot. The lower facing surfaces 4e and 4f of the blocks are formed such that one side 4f is inclined and the other side 4e is vertically formed at an angle β that matches the minimum pitch diameter of the V-belt. In addition, as shown in detail in FIG.
and 5d.

6d only) are provided respectively. block 4
The upper surface 4c and the lower surface 4d are respectively formed into a convex shape such as an arch shape and a concave shape for the purpose of reducing the weight of the V-belt.

The tension band 2.6 includes six non-stretchable bodies 7, 7 arranged substantially in the same plane, rubber members 8, 9 holding the six bodies 7.7, and upper and lower surfaces. It is composed of woven fabrics 10, 10 and 11° 11 which are embedded in a cylindrical shape. Tension band 2. One side surface 2a, 3a of the block 4 has substantially the same slope as the side surface 4a, 4b of the block 4, but the other side surface 2b, 5b does not have such a slope.

Moreover, as shown in FIG. There are grooves 5 of the block 4 on the second and lower surfaces of the second side. The four parts that mesh with the convex parts provided in B (the recessed parts 3c for the tension band 6).

6d only) is provided. Note that the convex portion of the block 4 and the four parts of the tension band 2.6 are means for transmitting and receiving power between the block 1 and the tension band 12, and when they are engaged with each other with the reverse block side as the concave portion and the tension band side as the convex portion, There is also. Also,
Grooves 5 and 6 in block 4 and tension bands 2. It is also possible to engage either the upper surface or the lower surface of B. Furthermore, chemical fixing means may also be used in conjunction with the adhesive side.

The non-stretchable six bodies 7.7 constituting the tension bands 2 and 6 are generally acid-containing fibers such as polyamide, polyester, and polyaramid, or inorganic fibers such as steel, class, and carphone.
Alternatively, it can be used as a twisted cord, woven fabric, or sheet-like body made of a blend of these materials.

On the other hand, the rubber members 8 and 9 are required to be made of a material with a large compressive Young's modulus and excellent wear resistance, and generally known synthetic combs reinforced with short fibers are used.

The woven fabrics 10 and 11 are required to be made of materials with excellent flexibility and abrasion resistance, and are generally made of textile fibers such as cotton, polyamide, polyester, polyaramid, etc., or the sides 2a and 3a of the tension bands 2.6 and the blocks 4. The side surfaces 4a and 4b are adjusted so that they are substantially flush with each other when they are aligned with the grooves of the speed change pulley (power transmission state).

In addition, the two tension bands 2 and 6 and the block 4 are
It is fixed in the 1st direction and 1st in the 1st width direction, and is usually removable.

If configured as above, the V-belt 1 is connected to the speed change pulley 2.
No. 7 is spaced apart from No. 1 and shows a state where it is not receiving side pressure S.
In the figure, the side surface 2a of the tension bands 2, 6.

6a slightly protrude from the sides 4a and 4b of the block 4, respectively. This is the rF compressive Young's modulus of tension band 2°6, typically 511 parts M8.9 reinforced with short fibers.
This is because the compressive Young's modulus of block 4 is approximately determined by .

In FIG. 5, which shows the power transmission state when the V-belt 1 engages with the speed change pulley 21 and receives the side pressure S, the side surfaces 4a and 4b of the block 4 and the side surfaces 2a and 3a of the tension bands 2 and 6 are They are substantially on the same plane, and the speed change pulley 2
Friction transmission force with 1 will be generated on all sides.

In this case, since the plastics, hard rubber, etc. used for the block 4 have a large compressive Young's modulus, the V-belt 1 can withstand high side pressure and the transmission torque is also large.

Also, the specific gravity of block 4 is normal! , θ or less, and is extremely light compared to a metal bell) and the centrifugal force is small, making it suitable for high-speed operation and advantageous in terms of safety.

The tension bands 2 and 6 are generally in the form of thin flat belts, have extremely good flexibility, and generate little heat, resulting in a long belt life.

When this V-belt 1 runs, especially when it transitions from a state where it is separated from the speed change pulley 21 to a fixed state fQ+, the tension bands 2 and 6 engage with the speed change pulley 21 and receive a compression action, and then the block 4 1 tension band 2.3 that engages with the speed change pulley 21
This reduces the impact caused by the engagement between the block 4 and the speed change pulley 21, thereby reducing noise.

The V-belt 1 is inserted into the groove 5 of the block 4. 1. Engagement between the convex portion provided in B and the recessed portions provided on the upper and lower surfaces of the tension band 2.6. Since Ml is fixed in the length direction of the V-belt 1 and can be attached and detached in the width direction, assembly is extremely easy.

However, while the V-belt 1 is engaged with the block 4, the tension band 2.6, and the speed change pulley 21, each side of the V belt 1 is worn out and modified to fit the groove of the speed change pulley 21, so the block 4 and tension band 2. Party B is not required to have strict processing accuracy.

Figure 3 shows a V-belt 3 with improved flexibility.
It is 1. The block 32 has a convex portion 66 on the upper surface of the groove,
The lower surface is provided with a curvature k that matches the minimum pitch diameter of the V-belt 61. Further, the tension band 64 has a recess 34a on the upper surface.
It has no unevenness on the lower surface.

Due to the effect of the curvature groove provided on the lower surface of the block 1, the polygonal phenomenon when the V-belt 61 engages with the speed change boot is prevented (and smooth rotation is performed. This belt is basically the same as the V-belt 1 shown in FIGS. 1 and 2.

Since the present invention is configured as described above, it has the following effects.

j) Transmission capacity increases.

Higher lateral pressure can be applied compared to conventional rubber V-belts, and the friction transmission force of all sides of the blocks and tension bands that make up the V-belt can be utilized. Furthermore, the % friction coefficient can be made almost the same as that of conventional rubber V-belts.

11) Suitable for high-speed operation and advantageous in terms of safety.

Compared to metal V-belts, it is lighter (115~.1/4) and has less centrifugal force.

l1l) Longer belt life.

It has better flexibility than conventional rubber V-belts and reduces body fatigue. Further, even with high lateral pressure, there is almost no buckling deformation of the V-belt, and since the belt generates little heat, there is little thermal deterioration of the component parts.

lv) Less noise.

Due to the compression action of the tension band, the impact on the block and transmission 7'-IJ is alleviated.

■) The cost of transmission devices that use belts is low.

The blocks and tension bands that make up the V-belt do not require strict processing precision, and can be easily assembled into the V-belt.

Furthermore, since the V-belt uses non-metallic materials such as plastics and rubber members, there is no need to lubricate the retaining surface of the metal gear shift boot, resulting in a dry-type gear shift device.

The V-belt of the present invention can be applied not only to continuously variable transmissions for automobiles, but also to continuously variable or stepped transmissions of vehicles equipped with engines such as agricultural machinery and civil engineering and construction machinery. I can do it. It is also ideal for high-load V-belts in general industrial machinery driven by electric motors. Furthermore, the top surface of the block can be used as a belt for conveyance or printing.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention, FIG. 1 is a side view of the V-belt, and FIG.
This state is shown in the cross-sectional view taken along the line ■-■ in Figure 1.
Figure 3 is a perspective view of the luff lock used for V-belts, Figure 7
The figure is a perspective view of the tension band used in the V-belt, and Figure 5 shows the V-belt in Figure 1 engaged with the gearbox and the power transmission state f1g.
+ Figure 4 is a side view of a modified V-belt, Figures 7 and 2 are explanatory diagrams showing the influence of the ratio of the upper width and thickness of the V-belt on buckling deformation. , Figures 2 and 7
FIG. 0 is an explanatory diagram of the speed change system. 1... V-belt, 2, 6... Tension body, 2
a, 3a...Side, 4...Block, 4a, 4b...Side, 5.6...7M, 31
・・・・・・■ Belt fJ 7 Figure 8 Procedures Amendment Book 1 Indication of case 1939 Patent 1jl No. 1 Jri♂2j 2 Name of invention ■ Belt 3 Name of the person making the amendment Case Related Patent Applicant Address: No./J, 3-chome, Meiwa-dori, Kobei 1-ku, Kobe, Hyogo Prefecture (506) Band-Kagaku Co., Ltd. Representative: Shigeo Kushimoto 4: Agent: 6: Claims column of the specification subject to amendment 7. Contents of the amendment As shown in the attached sheet 8. Attached list of dermatoses (1) Document stating the entire text of the amended scope of claims
The tension band has at least one side surface sloped and a non-stretchable joint is embedded, while each block is engaged with NiI tension bands on both sides. The tension band is formed with a groove formed on both sides thereof by sloped surfaces that substantially match the pulley groove surface, and is engaged with the pulley groove and subjected to an appropriate side pressure for power transmission. The side of the block and the side of the block are substantially the same. A V-belt, characterized in that the side surface of the belt is formed by (2) The V-belt according to claim 1, wherein the inclined surface 1'' is made of a non-metallic material. (3) Non-stretchable combinations of polyamide, polyester,
Synthetic fibers such as polyaramid, steel, glass,
The V-belt according to claim 1, which is in the form of a twisted cord, fabric, or sheet made of uncut fibers such as carbon or a blend thereof. (4) At least one of the upper and lower surfaces of the tension band is
The groove of the block has four parts or convex parts with a constant pinch, and the groove of the block has a convex part or a concave part that engages with the four parts or convex parts of the tension band, so that the block and the tension band are engaged and fixed in the belt length direction. The V-belt according to claim 1, wherein the V-belt is removable in the belt width direction. (5) The V-belt according to claim 2, wherein the non-metallic material is plastics, hard rubber, etc. (6) The V-belt according to claim 1, wherein the upper surface of the block has a convex surface such as an arch shape. (7) The V-belt according to claim 1, wherein the lower surface of the block has a concave surface such as an arch shape. (8) The V-belt according to claim 1, wherein the groove of the block has a convex surface with an appropriate curvature on the lower surface. Procedural Amendment Written by Manabu Shiga, Commissioner of the Patent Office, February 27, 1978. ■Indication of the case 1939 Patent Application No. 1328″2j 2 Name of the invention V-belt 3 Person making the amendment Relationship to the case Patent applicant address 3-2 Meiwa-dori, Hyogo-ku, Kobe, Hyogo Prefecture Name ( 506) Band-Kagaku Co., Ltd. (voluntary amendment) 6. Subject of amendment (1) Detailed description of the invention in the specification (2) Drawing (
No.! (Fig. J, Fig. O, Fig. 7, and Fig. 70) Contents of 7. Corrections (1) Page G of the specification, Lines 1 to ! Correct the line ``Jitsukai Sho Oichi Tag Tag No. 2'' to [Special Publication Shojj-67g No. 3 @J, see.'' 121 Specification Act, page 3, line 3 to line 5 [Jitsukasho, 52
- Otsu No. 96)" is corrected to "Refer to Utility Model Publication No. 3.2-70702." (X3) [Steel materials, castings,
"Aluminum alloy" is corrected to "steel, cast iron, light alloy." (4) Next to "rotational pitch diameter" on page 5, line 4 of the specification, r
Add dpl (DPI) and DP2 (dpz)J. (5) Specification No. 1/No./! Next to "determined" in the line [
If the pulley angle is α, add ]. (6) "[ani-J2-" on page j, line 1 of the specification is corrected to "[an-T"]. (Katana Ming fall memorial service? Page line g to line 2 "Cast iron...
...Delete "have". (8) Correct "Block 1" on page F/line 7 of the specification to "Block 4." (9) "Tension band 12" on page 5, line 20 of the specification is corrected to "tension band 2, 6." (10) “Used” on page 70, line 1 of the specification.
Next, people say, ``Although reinforcing with short fibers is advantageous in terms of strength, it is not necessary.'' (11) "Side pressure S" on page 77, line 2 of the specification is corrected to "side pressure." (12 Specification, page 77, line 7.5 - 1st side pressure S in line 7/B) is corrected to ``side pressure F''. (13) Mll l!F 1st page, line 1/! 'Usually,
...Reinforced" is deleted. fla Add "and" next to r4a and 4bJ on page 1/line 7 of the specification. (The following sentence is added between line 1 and line 77 on page 70 of the 151 specification. [In the above embodiment, the side faces 2a of the tension bands 2 and 3. 6a are the side faces 2' of the block 4, respectively. Although it is made to protrude slightly from a and 3a, it is not necessary to do so, and the side of the tension band and the side of the block are actually
When forming the side surface of the belt, the side surface of the tension band may be slightly recessed than the side surface of the block. (Figure 2, Figure J, Figure Z, Figure 2 and Figure 70 of Drawing 161 are corrected as shown in the attached sheet. Figures, Figure O, Figure 2, and Figure 1θ) 1 copy

Claims (1)

[Claims] (1) A plurality of blocks are engaged with an endless/paired tension band, and the tension band has an inclined side surface on at least one side and includes six non-stretchable bodies. Each of the blocks has a groove formed on both sides thereof to be engaged with the tension band, and both sides are formed with inclined surfaces that substantially match the pulley groove surface and engage with the booby groove. and the side surface of the tension band and the side surface of the block are substantially flush with each other to form a side surface of the belt when the tension band is subjected to an appropriate side pressure for power transmission. ■Belt. (2) The belt according to claim 1, wherein the vicinity of the inclined surface is made of a non-metallic material. (81 Claims in which the non-extensible 6 bodies are twisted cords, fabrics, or sheets made of synthetic fibers such as polyamide, polyester, and polyaramid, or inorganic fibers such as steel, glass, and carbon, or blends thereof) ■ Belt described in item 1. (4) The upper and lower surfaces of the tension band (both have concave portions or convex portions with a constant pitch, while the grooves of the block have convex portions that mesh with the four portions or convex portions of the tension band). (5) The belt according to claim 1, wherein the belt has a part or a recess, whereby the block and the tension band are interlocked and fixed in the length direction of the belt, and are detachable in the width direction of the belt. (5) ■The belt according to claim 1, in which the non-metallic material is plastics, hard rubber, etc. (6) Claim 1, in which the upper surface of the block has a convex surface such as an arch shape. (7) The belt described in claim 1, in which the lower surface of the block has a concave surface such as an arch. (8) The groove of the block has a convex surface with an appropriate curvature on the lower surface. However, the V-belt according to claim 1.