JPS60143243A - Steel belt and continuously variable transmission with use thereof - Google Patents

Abstract

PURPOSE:To stabilize a steel belt as well as improve generated frictional force by increasing a contact region between a V type pulley inner wall and a chain type steel belt. CONSTITUTION:A bush chain comprises an inner link 13, an outer link 14, a pin 15, and a bush 16. A block hole 17 is provided through a substantially central part of the inner link 13 and the outer link 14. A V block 12 in frictional contact with a V type pulley is fixed in a block hole 17. Both end surfaces 18, 18 of the V block 12 are inclined in a slant angle, and brought into contact with a V type pulley slant surface.

Description

[Detailed description of the invention] It's about belts.

There are two types of belts used in continuously variable transmissions: one made of rubber and one made of gold. The belt according to the present invention is a chain-type belt that falls under the latter category.

Various types of chain-type steel belts are used depending on the purpose, but the most typical type is the belt type, which has a large number of links and inserts a pin into each belt so that it can be bent freely. However, there is a type in which a predetermined power is transmitted by the frictional force generated between the two end surfaces of the bottle and the V-shaped pulley.

13 is a conventional example of the belt mentioned above, in which the contact points A and 13 change continuously as the bottle or V-shaped pulley with slightly convex end faces moves, and the main drive The speed changes from the shaft to the driven shaft steplessly.

However, the steel bell 1- contacts the inner wall of the V-shaped pulley with theoretical point contact at points A and B, and the normal cuff 1' is perpendicular to the inner wall (3) at the points A and B. and the radial component of the tension acting on the steel bell 1- y (F)
However, in order to transmit a large amount of power, increase the normal line J (T) and set the bin (1) -
It is necessary to increase the frictional force between the inner walls (3), and the contacts A and B become extremely high pressure, which may not be able to withstand the allowable withstand pressure.

However. This creates a need to enlarge the contact area between the inner wall of the V-shaped pulley (2) and the bottle (1), but this must not make the overall weight of the steel bell 1 too large.

In addition, the tension force acting on the steel belt is transmitted, and the V-shaped boob IJ-
(J) and inducing a frictional force by applying high pressure are functionally different, and it is difficult to achieve both of the above three.

The present invention provides steel bells for a period of 11J or more as one unit.
By solving the I↓ point, that is, by encouraging the expansion of the contact area between the ■-type boob II-(J) inner wall and the nutirbe/L/l-, it is possible to stabilize the steel tube (tv) and improve the generated frictional force. By configuring the contact member with the V-shaped pulley other than the bottle, the purpose is to satisfy the mechanical properties such as t1 trade and hardness specific to the above-mentioned contact member, and to generate high frictional force.

Therefore, the steel bell 1- according to the present invention is an endless multi-segmented body that has a constant pitch and bends between each pitch, and has through holes in the nodes or links, and uses nucleation to form a V-shaped pulley. The V-block that makes frictional contact is placed on top.

Embodiments of the steel belt according to the present invention will be described in detail below with reference to the drawings, and a case will be described in which a bush chain (//) is used as the endless multi-segment body.

Therefore, the steel belt has a bush chain (//) and a V block (//) as shown in FIGS. 1 to 3.
Ω) This bushing chain (//) is basically the same as the conventional bushing chain, and has inner links (/3
), outer link (/l), bottle (/S) and bush (/O). Of course, the inner link (/3) is press-fitted into the bush (/2).
) and the outer link (/) press-fitted into the bottle (15) are bent to each other.

Therefore, the inner link (/3) and the outer link (/ri) are oval shaped, and there is a pro in the center.

A hole (/7) is formed. The block hole (/7)
is a vertically long rectangle, and each corner is designed to relieve concentrated stress.
It has a small roundness.

By the way, the V block (/2) that comes into frictional contact with the V-shaped early is fixed to the hole (/7) in the above-mentioned professional hole, but both end surfaces (7g) of the V block (/2) are fixed to the hole (/7). 7g) is inclined with a rigid oblique angle (θ), ``2 V-type pulley oblique]
Contact with m. Of course, it is better that the end surface (18) be formed as a flat surface, but it may be formed into a slightly convex curved surface.

The V block (/2) has a block hole (
/7), but in Figure 3 it is incorporated into the V Pro 2 (/7).
A step (/9) is formed on both sides of the lower part of the frame F, and it is fixed with an inner and outer link (/3) (/l).

Also, as shown in the figure, steps (/9) are formed on both sides of the V block (/2) and fixed to the inner and outer links (/3) (/4'). good.

The above describes the most basic form of the steel bell according to the present invention, and the present invention is by no means limited to the above form, and the shape of the inner and outer links (/3) (/l), The shape of the block hole (/7), the number of block holes (/7) provided in the /link, and the ■Pro, ri (7, 2
), the method of fixing the V-pro ri (/, 2) to the inner and outer links (/3) (/l), and the structure of the inner and outer links (/3) (//I), that is, the chain Various embodiments can be considered within the scope of the technical idea belonging to the present invention, such as the configuration of.

/Number of block holes The position of the hole (/7) is as shown in Figure 1, it is formed approximately in the center of each link, or
It is not only possible to attach a pro, ri (/-), but also to divide it into small pieces and attach it. (Figure 5) Shape of Niblock Hole The shape of the hole (/7) is not limited to the vertically long rectangle shown in Figure 2.

As illustrated in FIGS. 4(n) to (0), it can be triangular, oval, circular, etc.

? ■Block configuration■Both end faces (1g) C1g) of Gronoori (/-?) are as follows:
It comes into contact with the V-shaped pulley and plays the role of transmitting a predetermined frictional force to the chain.
') is not only configured as seven rigid bodies as shown in Figure 1 (Figure 7 (a)), but also in Figure 7 (01) to (11), and Figure 5 (11) (b)
It can be configured as shown in .

That is, in Fig. 7, (+1) is a combination of multi-layered rice, (c) is a multi-layered one made of different materials, (
d) is a different combination of different materials, (a) is a combination of the same materials or different materials, and the end surface (1g)
(') is a type with different types of material attached to both end faces (7g) and (1g) to increase the generated friction, (g)
) is a V-Pro 2 Ri (No) with an elastic body incorporated in the middle part to absorb variations in dimensional tolerance, and (11) is the same one with a convex part formed in the middle part without incorporating the above elastic body. The aim is to have a positive effect.

Also, although the method of fixing to the inner and outer links is different, it is also possible to use the V-Pro shown in FIGS.

V block O- shown in Figure 7 (,) - (+1)
The fixing method for the /ri (/2) is as shown in Fig. 3 and Fig. q. However, in addition to these methods, methods shown in FIG. 9 (11) to (1) can be adopted.

(a) is the one with a single hole inserted into the pro-7 hole (/7), whether loose or fitting, (1)) is the one with a step (/9) formed at the top, (C) is the top (d) has a step (/9) formed at the bottom, (d) has a step (/9) formed in the horizontal direction, (e), (r), and (g) have the tip of the double-edged tool cut out and press-fitted. In (b) (i) (, i), the V block is tapered and press-fitted into the block hole (/7).

As shown in Figure 1O (,), ■ Pro, ri (/, with a small hole made in the ri and secured with a bottle (, 20) or rivet, etc., as shown in Figure 10 (b)) After inserting the small V-Pro 2 piece (2/) into the block hole (/7), it can be caulked from the opposite side.

Bottle holes or bush holes are drilled at a certain distance in the constituent links of the S link, and the bottle holes and bush holes serve as the nodes of the U during bending.

Depending on the structure of the links, there are two types: the bunyu chain type shown in Figure 1 (a) and the leaf chain type shown in Figure 1 (b). 7) Form ■Pro 5. It is possible to fasten the wire (/2).

In addition, by adopting a chain (Figure 1 ((・)) that is a multi-row bushing chain shown in Figure 1 (, ), the chain tension is increased and the transmission of higher power is handled. obtain.

Furthermore, in order to reduce the wear caused by rotational sliding during bending between the links, the bottles can be made into split bottles and subjected to rolling motion, as shown in FIG. 7.2.

As described above, the steel belt according to the present invention is
A ■ block (/
2), and the present invention is by no means limited to the embodiment described in e.

(2) It is also possible to adopt a method in which the blocks (7, 2) are not fixed to all the bits, but are fixed to every other bit depending on the required power.

In addition, the steel belt 1- is wound around a V-shaped pulley in principle, and the radius of the winding of the steel belt increases or decreases depending on the distance between the side slopes of the V-shaped pulley. Although it allows for step-shifting,
It can be wrapped around a V-groove pulley as a substitute for the conventionally used V-bell 1, and can fully demonstrate its function for constant speed operation.

In this way, the steel belt according to the present invention has V blocks (/, 2) fixed to a multi-segment chain, and the steel belt that is wound around the sprocket is heavier than the roller chain used. This is effective in suppressing slip between the V-shaped pulley and the V-shaped pulley during acceleration and deceleration.

The bin takes on the load for bending as a chain,
■Pro and ri share the feeding load due to frictional contact with the V-shaped pulley, so the load is shared by each.

In addition, the V block (/λ) can be used as a friction piece with its material and mechanical properties such as hardness in an optimal state, and its small size allows it to be used for high horsepower transmission, especially with high transmission efficiency.

Moreover, the production of the steel belt is quite simple.

In other words, a link with a hole (/7) punched from a series of steel strips at the same time as a bottle hole or a bush hole is machined, and a block (/, ri is relatively thin if the thickness is Links and V-blocks (/2) can be manufactured easily and quickly by press punching, then by forging if they are thick and professionally shaped, or sometimes by sintering, and then assembled with separately processed bottles and bunyu. Therefore, it can be easily manufactured with almost no difference from the manufacturing of conventional roller chains.

[Brief explanation of the drawing]

Figure 13 is an example of a conventional steel bet. Figures 1 to 3 show the steel building according to the present invention divided into two parts, and Figure S shows the case where the block hole is divided into a plurality of parts.
Figures (11), (b), and (c) show the shapes of the block holes, Figures 7 (-) to 01), and Figures g (, ), (
b) is an example of the configuration of the V block, as shown in Figure (a).
) and FIGS. 70(a) and (b) show the method of attaching the V block to the link, and FIGS. 1/(11), (b) and (c)
) shows an example of the structure of the chain, and FIG. 72 shows a case in which the bent part of the chain is rolled and bent. (//) ・Bush chain (/2)...v-pro, ri (/3) ・Inner link (/lI)...Outer link (/3)...Bin (/O)...Bush ( /7)・
...Block hole (7g) ...End face (/) ...Step (2) ...Bin (,2/) ...Block piece Fig. 5 (b) ' (C) Fig. 6 Fig. 7 9 b Figure 9 (α) (b) Figure 10 Figure 12

Claims (1)

[Claims] (1) In a chain-type steel belt used for winding around a V-shaped pulley or a V-groove pulley, a block hole is formed approximately in the center of the links constituting the chain, and A 7-chiel belt characterized in that a V block that makes frictional contact with a V-type pulley or a V-groove pulley is fixed to the block hole. Claim 1, wherein the chain is connected by a bush and a pin so that it can be bent in one direction, and the bush and pin constitute a bearing part. Steel belt as described. (3) The steel belt according to any one of claims 1 to 2, wherein the chain has a single row or multiple rows. (4') The chain is configured such that links for attaching the V-block and links for attaching the V-block to at least both outer sides are arranged in parallel with each other and can be bent in a bin. Steel I level/l as described in item 1
/ ). (S) In a device that performs stepless speed change by winding a chain-type steel bell zlzl around the V-shaped pulleys of the main and driven shafts, a block hole is formed approximately in the center of the link that constitutes the chain-type steel bell 1. A continuously variable transmission device in which a steel plate constructed by fixing a V block that makes frictional contact with a V-type gooley is wound around the block hole.