JPH03168446A - High load transmitting belt - Google Patents

Abstract

PURPOSE:To improve power transmitting efficiency of a belt with its collision and squeak noise reduced by fitting a rocker pin to main link and sublink members and forming the end part of the rocker pin to serve as a tilt end face brought into contact with wall surfaces of a V pulley. CONSTITUTION:A high load transmitting belt 1 is constituted of a plurality of cylindrical main link members 10, plurality of sublink members 20, connecting pins 30 and rocker pins 40. The rocker pin 40, having tilt end faces 41 brought into contact with a wall surface of a V pulley, is set up in a space part, positioned in the main link and sublink members 10, 20, in a manner wherein the respective link members are fitted to a pair of groove parts, opposed to each other, provided in the axial direction of the rocker pin 40. Thus, the rocker pin is prevented from moving in its axial direction, while the tilt end face, brought into contact with the wall surface of the pulley, sufficiently resists against a side pressure, and large power can be transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to high-load power transmission belts, particularly high-load power transmission belts used in vehicles such as automobiles and various mechanical transmission devices.

(Prior Art) Conventionally, power transmission systems for high-load power transmission belts are generally classified into two types: compression transmission and tension transmission.

Among these, rubber belts, metal chains, and metal belts have been proposed for tension transmission.

The metal chain belt has a structure in which a plurality of link plate groups are bently connected by pins, and a V-shaped block body having a tapered surface that contacts the pulley wall is inserted between the pins. No. 57-22442,
JP-A-59-226729 or JP-A-59-22
This method is disclosed in Japanese Patent No. 6730 and the like.

In addition, a belt that connects a group of link plates with both ends of the pin tapered to engage with the wall surface of the pulley is also disclosed, for example, in Japanese Utility Model Application No. 63-37846, but this belt of Yuzu has a diameter of the pin. By increasing , sufficient power can be transmitted.

In this way, the above-mentioned belt solved the problem of high-load transmission, but
However, the noise problem still remained unresolved.

For this reason, as another diene belt, JP-A-63-21
As disclosed in Japanese Patent No. 9937, it has been proposed that a freely movable tip body is attached to both ends of a pin connecting a plurality of link plate groups, and when the belt enters the pulley, the tip body is attached to both ends of the pin. By adapting the tip to the side wall of the pulley and rotating the tip itself, vibrations, low links, and collisions when the belt enters or exits the pulley are alleviated. In other words, this chain belt is designed so that the tip body rotates around the pin slightly, so when the belt enters or leaves the pulley under high load transmission conditions, the tip body actively rotates. try to rotate. This is because the lateral pressure applied to the contact line between the side wall of the V-pulley and the tip body or the tensile force in the longitudinal direction of the belt is distributed in different magnitudes on this contact line, and this generates a rotational moment in the tip body.

(Problem to be solved by the invention) However, as a result, in the belt described above, the chip body rotates at the fitting part with the pin and generates heat, which tends to cause early fatigue failure, and also causes noise when the belt runs. Became.

Furthermore, since this chain belt is required to have lateral pressure resistance, the chip body is designed to have a size larger than a certain value. As a result, the arrangement pitch of the chip bodies has increased, and the weight of the chip bodies has also increased, so that when the belt enters the pulley, the collision noise with the pulley cannot be reduced due to the impact energy.

Furthermore, if the arrangement pitch of the chip bodies increases, when the belt engages the pulley, it becomes a polygon with small internal angles and does not engage smoothly with the pulley. For example, the contact line between the chip body and the pulley wall becomes high. Large rotations under pressure caused large squeaks.

The present invention thus reduces the noise caused by the collision noise between the belt and the pulley that occurs when the belt enters the pulley, and also makes the belt into a polygonal state with large internal angles when engaged with the pulley. The object of the present invention is to smoothly engage the belt and the pulley, thereby reducing squeaks caused by friction between the belt structure or members or squeaks between the belt and the pulley.

It is also aimed at children to improve the power transmission efficiency of the belt.

(Means for Solving the Problem) In order to achieve the above object, the high-load power transmission belt of the present invention has a main link member and a sub link member each having at least one opening in the axial direction of the cylindrical shaft. are fitted into each other through the openings, and combined endlessly with each other with spaces between the main link members and the sub link members, and the connecting pins are formed by the inner walls of the main link members and the sub link members. A rocker pin having an inclined end face in contact with the pulley wall is inserted into the space located between the main link member and the sub link member, and the shaft is inserted into the rocker pin so that the space is almost filled. At least one groove provided along the direction is fitted into the main link member and the sub link member.

(Function) In the high-load power transmission belt of the present invention, in the space located in the main link member and the sub-link member, ■ a rocker pin having an inclined end surface that contacts the pulley wall surface is provided in the axial direction and facing each other; By fitting each link member into a pair of grooves, the rocker pin does not move in its axial direction, and the inclined end surface in contact with the pulley wall can sufficiently withstand lateral pressure, allowing large power to be transmitted. enable. Then, when the belt enters the belt, the main link member and the sub link member rotate so as to smoothly slide on the surfaces of the connecting pin and the rocker pin, thereby eliminating the occurrence of large squeaks.

In addition, since the main link member and the sub link member are cylindrical, the weight of the belt can be reduced, and the collision energy between the belt and the pulley when the belt enters is proportionally small, and the collision noise is is also reduced.

Since the connecting pin and the rocker pin have inclined end surfaces in contact with the V-pulley wall surface, the belt can sufficiently withstand lateral pressure from the pulley and can transmit a large amount of power.

Furthermore, since the pitch length of the bending point along the belt's longitudinal direction is shortened, when the belt engages the pulley, the belt becomes a polygonal state with a large internal angle, that is, a smoothly curved polygonal state. As a result, the belt can enter the pulley smoothly, and the squeaks between the belt components and the squeaks at the contact portion between the connecting pin and the inclined end surface of the rocker pin and the V-boot wall are also reduced.

(Example) Hereinafter, specific examples of the high-load transmission belt of the present invention will be described with reference to the accompanying drawings.

The high-load transmission belt 1 shown in FIGS. 1 to 3 is composed of a plurality of cylindrical main link members 10, a plurality of sub link members 20, a connecting pin 30, and a locker bin 40. The main link member 10 has a plurality of elongated openings 11 facing each other in the axial direction of the cylindrical member, while the sub link member 20 has a shorter axial length than the main link member 10. Although different, they are basically the same shape,
An opening 21 is also provided. However, the sub link member 20
may have the same shape and the same axial length as the main link member 10. The main link member 10 and the sub link member 20 fit into each other through openings 11 and 21, and a space 12 is formed between the main link member 10 and between the sub link member 20.

That is, the main link member 10 enters the sub link member 20 from the opening 21, and the sub link member 20 also enters the main link member 10 from the opening 11, and the main link members 10, 10 are spaced at a constant interval within the sub link member 20. Similarly, the main link members 10 and the sub link members 20 are arranged at the same pitch. For this reason, the circumferential length of the openings 11 and 21 is determined in consideration of the penetration dimensions of each link member.

The space 13 surrounded by the inner walls of the main link member 10 and the sub link member 20 is provided at regular intervals along the belt longitudinal direction, and rod-shaped connecting pins 30 having a cross section that almost fills this space are provided. It accommodates. The cross-sectional shape of the connecting pin 30 may be circular, oval, etc., and is not particularly limited.

At both ends of the connecting pin 30, inclined end surfaces 33 are provided which are in contact with the V-pulley wall surface and project outward from the main link member 10. In order to prevent the movement of the connecting pin 30, a link-shaped stopper member 86 that matches the cross-sectional shape of the pin is provided in a concave groove 3 on the circumferential surface of the protrusion of the pin.
5 and stands out.

Further, in this embodiment, a locker bin 40 having a substantially rectangular cross section is inserted into the space 12 provided in the main link member 10 and the sub link member 20, as shown in FIGS. 7 and 8. That is, there are two types of rocker pins 40, both of which have (1) a flat inclined end surface 41 in contact with the pulley wall surface; Grooves 42 are provided at positions facing each other at regular intervals along the line. Among them, the rocker pin 40a shown in FIG. 7 has block rests 43 at both ends, while the rocker pin 40b shown in FIG. These rocker pins 40a, 40b are arranged alternately in the space 12, but in this case, since each groove 42 fits the main link member 10 and the sub link member 20, the rocker pin 40 is axially Movement to is prevented.

When such a high-load transmission belt 1 enters or leaves the pulley 50, as shown in FIG. 10 and the contact point P of the rocker pin 40,
It rotates by an angle formed by the center point O of the pulley and the contact point Q between the sub link member 20 and the other rocker pin 40. In the case of the present invention, the interval between P and Q is shorter than that of conventional belts, which reduces the rotation angle of the link member and reduces the squeaking noise generated at that time. That is,
The short distance between the bending points P and Q of the belt means that when the belt engages with the boob, it becomes a polygon with a large internal angle, making it easier for the belt to smoothly enter the pulley.

Further, the angle of the inclined end surface 41 of the rocker pin 40 is the same as that of the inclined end surface 33 of the connecting bin 30, and each of the inclined end surfaces 41 and 33 abuts against the wall surface of the V-pulley. The belt is ■
When entering the pulley, the connecting pin 30 and rocker pin 4
The inclined end surfaces 33, 41 and the V-pulley wall surface are in contact with each other along a straight line of contact, which is advantageous in transmitting the driving force. In addition, since the gap between the inclined end surfaces 83 and 41 is small, the contact time between the V pulley and the inclined end surfaces 83 and 41 is longer than the time when the V pulley is in contact with the inclined end surfaces 83 and 41. This also shortens the period of no contact between the belt and the pulley, greatly reducing the collision noise (pitch noise) between the belt and pulley.

(Effects) As described above, in the present invention, the rocker pin fits into each link member, and the end portion of the rocker pin fits into each link member. Similar to the belt, the belt has an inclined end surface that touches the bobbin wall, which prevents the rocker pin from moving or falling off, and the belt can sufficiently withstand side pressure from the pulleys, allowing for efficient power transmission. In addition, since the main link member and the sub link member are cylindrical, the weight of the belt can be reduced, and when the belt enters the pulley, the collision energy between the belt and the pulley is proportionally reduced, resulting in a collision. Sound is reduced.

Furthermore, the belt has a structure in which the intervals between the bent parts are shortened, and even when the belt engages the pulley, the belt enters the pulley smoothly by forming a polygonal state with a large internal angle, that is, a state close to a circle. At the same time, since the rotation angle of the link member is reduced, the squeak generated when sliding between the link member and the connecting pin is reduced.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a high-load power transmission belt according to the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. 2, and FIG. 5 is a sectional view taken along line DD in FIG. 1, FIG. 6 is a perspective view of the main link member used in the high-load power transmission belt of the present invention, and FIG. FIG. 8 is a perspective view of a rocker pin used in the belt, and FIG. 9 is a side view of a main part showing a state in which the belt shown in FIG. 1 enters a pulley. 1... High load transmission belt 10... Main link members 11, 21... Opening 20... Sub link member 30... Connecting member 36... Stopper member 40... Rocker pin 41... Inclined end surface 4.2・Groove

Claims (1)

[Claims] 1. A main link member and a sub link member each having at least one opening in the axial direction of the cylindrical body are fitted into each other through the opening, and the main link member and the sub link are fitted together through the opening. The members are assembled with each other with a space between them, and the connecting pin is inserted into the space surrounded by the inner walls of the main link member and the sub link member, and a rocker pin having an inclined end surface in contact with the V-pulley wall surface is formed. At least one plurality of grooves provided in the rocker pin along the axial direction thereof are inserted into spaces located in the main link member and the sub link member, respectively, and are fitted into the main link member and the sub link member. A high-load transmission belt featuring: 2. The connecting pin has an inclined end surface in contact with the V-pulley wall surface,
2. The high-load power transmission belt according to claim 1, wherein a link-shaped stopper member is fitted in a region projecting from the link member.