JPH0297746A - Chain steel belt for continuously variable transmission - Google Patents

Abstract

PURPOSE:To enable high speed operation to be attained of a belt formed in small size and in light weight by constituting the belt such that a friction plate stopper plate is mounted to be fitted to upper and bottom sides of inner and outer link plates and to upper and bottom surfaces of a friction plate having a slope agreeing with a V-shaped groove formed by a set of pulleys. CONSTITUTION:Inner and outer link plates 2, 3 provide in both ends a curved surface of radius R 1/2 times or less the chain pitch P with a pin hole 12 serving as the center, and a width is set to slightly two times or more the radius R. Length of upper and bottom sides of the link plate agrees with the width of upper and bottom surfaces of a friction plate, and a protrusion 5 is formed. The friction plate 7 has a sloped surface 6 agreeing with a V-shaped groove formed by a set of pulleys, and forming the sloped surface in its width a little narrower than the pitch P and in the upper and bottom into a tapered shape, a protrusion 10 is provided. A friction plate stopper plate 8 forms its width to agree with the width of the upper and bottom surfaces of the friction plate, and a notched hole 11 is formed in a position of agreement with the protrusions 5, 10 of the link plate and the friction plate in the time of assembly. Mounting these protrusions and notched holes to be fitted, a belt is formed by calking a protrusion head part. Thus, the belt quiet, durable and in light weight is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chain-type steel belt that is wound around a continuously variable transmission using two sets of opposing conical pulleys (hereinafter referred to as pulleys).

(Prior Art) The basic form of a chain-type steel belt includes a friction plate for making frictional contact with a pulley, and the I! It is made up of a chain that attaches to the board.

There are various forms of these chains and friction plates, and Figures 9a and 9b show an example of a conventional chain-type steel belt. A friction plate with an upward opening is inserted into this groove, and a fixing pin is passed through the upper part to hold the chain.The inner surface of the opening of the friction plate and the side of the link plate are brought into close contact. This is structurally difficult, especially the friction plate for the inner link plate, which slides on the inner surface of the adjacent outer link plate, and is easily damaged under high-speed, highly variable loads, and requires the use of retaining pins. Therefore, f! There are many problems in that the sheet metal body becomes thicker, the pitch of the chain increases, and the weight also increases.

(Objective of the present invention) As mentioned above, conventional chain-type belts still have problems, but the present invention solves these problems and provides a chain-type steel belt that is light, strong, easy to assemble, and quiet. This is what we provide.

(Structure of the present invention) In order to solve the above-mentioned problems, the chain-type steel belt according to the present invention is structured with the following features.

The basic form of the steel belt is to hold a chain.
The friction plate is attached via a friction plate fixing plate, and the friction plate has an inclined surface on its side surface that matches the V-shaped groove formed by a pair of pulleys, and the width of the side surface is set to be smaller than the chain pitch. The width is slightly narrow, and the shape is tapered upward and downward to prevent interference between adjacent side surfaces when bending the chain.The height matches the width of the link plate, and the friction plate fixing plate is fitted on the upper and lower surfaces. It has a protrusion for attaching it.

11! The friction plate fixing plate (hereinafter referred to as the fixing plate) is made of an elongated rectangular thin steel plate, and the H1
! ! Protrusions are formed on the plate and the upper and lower sides. Cut holes are made at positions that match the positions of the protrusions when the inner and outer link plates are assembled. A series of chain-type steel belts are created by fitting the notches in the mounting plate and caulking the heads of the protrusions.

Embodiments of the chain type steel belt according to the present invention will be described in detail below based on the drawings.

(Embodiment) As shown in FIG.
I! has an inclined surface on its side surface that matches the V-shaped groove formed by the set of pulleys. This is a steel belt for a chain-type continuously variable transmission that is fixed to the center of each pitch of the chain via a J-rubbing friction plate fixing plate 8 (Fig. 2.3.8).

To explain the steel belt of the present invention, the chain is a known pin link chain, and inner link plates 2, 2,
・Outer link plates 3, 3... have pin holes 12 (Fig. 5 a)
, has a curved surface formed at both ends with a radius R of 1/2 or less of the chain pitch P, centered at FIG. 6a), and its width is slightly more than twice the radius R. This is because the fixing plates (Fig. 8 a to d) are fitted to the upper and lower sides of the link plate for S swing plate installation, so if the width of the fixing plate is close to the pitch length, This is to ensure that the gap between the curved surfaces at both ends of the link plate and the fixing plate is appropriate when the chain is bent. If the width of the fixing plate is relatively narrower than the pitch length, the width of the link plate is Make it twice as wide.

The lengths of the upper and lower sides of the link plate, which are slightly larger than twice the radius R, are made to match the widths of the upper and lower surfaces of the 111 friction plate, which will be described later, respectively, and the fixing plate 8 is fitted in the center of the upper and lower sides. A protrusion 5 is formed. (Fig. 5.6a) On the other hand, the vibration plate (Fig. 7a, b%C) is formed by a set of pulleys.
It has an inclined surface 6 on the side surface that matches the shape groove, and the width of the inclined surface is made slightly narrower than the pitch of the chain (Fig. 7b).
, Slightly vertical straight sections 9 are provided above and below the horizontal center line, and when the chain is bent, the width is tapered upward and downward so that the adjacent side sections do not interfere with each other. The height matches the height B of the link plate, and projections 10 are provided on the upper and lower surfaces to be attached to the fixing plate.

The protrusions are formed above and below the center of the inner side of the friction plate when assembled, as shown in FIGS. 7a and 7c.

Applicable! J! ! ! The plates are formed by pressing, forging, sintering, extrusion, or drawing to reduce processing costs.

Extruded materials and drawn materials may be extruded and pulled out in the longitudinal direction of the friction plate, or extruded and pulled out in the horizontal direction, but in both cases, they are cut and processed.

The friction plate fixing plate 8 is made of an elongated rectangular steel plate.
Figures a-d) Adjust the width to match the width of the upper and lower surfaces of the friction plate, and place the link plate and friction plate at positions that match the positions of the inner and outer link plates and the protrusions of the friction plate during assembly. A cutout hole 11 (FIGS. 8a and 8b) to be fitted is formed. In addition, as shown in the side view (Fig. 8c, d), each corner 13 of the friction stopper plate is slightly chamfered to create an appropriate gap between the curved surfaces of both ends of the link plate when the chain is bent. do.

When the number of link plates constituting the chain is large, it is not necessary to provide protrusions on all the inner and outer link plates of the chain, but only the number necessary for strength, and no protrusions are provided on the other link plates. Therefore, it is not necessary to provide notches in the fastening plate continuously corresponding to the positions of the link plates, but only in the portions where the projections are provided.

(Fig. 8e, f) As mentioned above, the present invention provides a friction plate that has protrusions on the upper and lower sides of the inner and outer link plates, and has an inclined surface that matches the ■-shaped groove formed by a pair of pulleys. Friction plate attachment with protrusions formed on the upper and lower surfaces of the plate, placed on the left and right sides of the chain, and having notched holes that fit into the protrusions of the intraocular and external link plates and the protrusions of the friction plate, respectively. Fit the plate onto the chain and the top and bottom surfaces of the friction plate,
It is a chain-type steel belt with the head of the protrusion caulked.

(Effects) 1. The chain type steel belt of the present invention has an inclined surface on its side surface that matches the V-shaped groove formed by the upper and lower sides of the inner and outer link plates and one set of pulleys.
i! ! protrusions are provided on the top and bottom surfaces of the plate, and a friction plate fastening plate is fitted onto these projections, and the height of the belt is the width of the link plate plus the thickness of the fastening plate. As a type of chain holding system, the height of the belt can be made extremely low, and the external shape of the belt can be made smaller, making it possible to reduce mff1 and reducing the running resistance in the oil of the transmission. The shape is ideal for high-speed operation.

2.Since the height of the friction plate is the same as the width of the link plate, the weight of the belt can be greatly reduced compared to conventional steel belts with trapezoidal friction plates.

3. Processing costs can be reduced because the friction plate is pressed, forged, sintered, or cut into pieces from extruded or drawn material.

4.Provide protrusions on the inner and outer link plates of the chain and the friction plates placed on the left and right sides of the chain, insert and fit elongated rectangular fastening plates made of thin steel plate into these protrusions, and caulk the heads of the protrusions. The assembly process is extremely simple and easy, and the assembly cost can be reduced.

5. The width of both sides of the friction plate is slightly narrower than the pitch of the chain, so both sides have a flat surface, and the contact between the pulley and the friction plate is extremely smooth during operation.
Collision noise with the pulley is prevented, allowing quiet operation. The present invention is an excellent steel belt having many outstanding features as described above.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing how a chain-type steel belt is attached to a pulley. Fig. 2 is a plan view of a chain-type steel belt according to the present invention. Fig. 3 is a front view of a chain-type steel belt according to the present invention. Fig. 4 is a diagram showing a chain-type steel belt according to the present invention. Figure 5a is a front view of the inner link plate, Figure 6a is a front view of the outer link plate, and Figure 7a is a side view of the outer link plate. Figure 8a is a front view of the friction plate for the outer link plate of the friction plate fixing plate. C is a side view of the friction plate. Front view C is a side view of the outer link plate of the friction plate fixing plate.D is a side view of the inner link plate of the friction plate fixing plate.E is a side view of the friction plate fixing plate with one protrusion of the outer link plate removed. Front view f is a front view of the friction plate fixing plate with one part of the inner link plate protrusion removed. Figure 9 a is a front view of a conventional steel belt. A side view of a conventional steel belt. Chain-type steel belt. Inner link. Plate, outer link plate, pin, protrusions on the inner and outer link plates, side surface of the friction plate, friction plate, II friction plate fixing plate, straight part provided on the side surface of the friction plate, protrusion provided on the friction plate, Notch hole provided in the friction plate fixing plate, pin hole 13, corner of the friction plate fixing plate

Claims (2)

[Claims] (1) In a chain-type continuously variable transmission, a pair of opposing conical pulleys is attached to two parallel shafts, and the pair of conical pulleys is attached to the center of each pitch of the chain. In a chain-type steel belt that is used by attaching a friction plate that matches the V-shaped groove formed by the pulleys and passing it between the pulleys, the above-mentioned chain is connected with inner and outer link plates arranged in sequence and connected by pins. A link chain, the inner and outer link plates are centered on the hole through which the pin passes, and both ends are formed with a radius R slightly smaller than 1/2 of the chain pitch, and the width of the link plate is slightly smaller than twice the radius R. Furthermore, protrusions are formed symmetrically in the center of the lower side, and the friction plate has an inclined surface that matches the V-shaped groove formed by the pair of conical pulleys. Located on both the left and right sides of the pitch,
Protrusions are formed symmetrically on the upper and lower surfaces, and the width of both side surfaces is slightly shorter than the pitch length of the chain, so that the upper and lower ends of both sides of the adjacent inclined surfaces do not interfere when the chain is bent. The friction plate is tapered downward, its height matches the width of the link plate, and the friction plate is attached to the chain via a friction plate fixing plate, which will be described later. The friction plate fixing plate is made of thin steel plate and has an elongated rectangular shape, and has notched holes formed at the positions of the respective protrusions of the inner and outer link plates and the friction plates attached to the left and right sides of the chain when the chain is assembled, The required number of inner and outer link plates are alternately connected with pins to form a series of chains, with protrusions on the upper and lower sides of the inner and outer link plates of the chain, and the upper surface of friction plates arranged and attached to the left and right sides of the chain; A chain-type steel belt structure in which the friction plate fixing plate is fitted onto the protrusion on the lower surface from above and below, and the head of the protrusion is caulked. (2) The first link plate has an oval shape with a width twice the radius R, which is slightly smaller than the chain pitch, and a protrusion is formed on the lower side, and the friction plate is attached to the chain via the friction plate fixing plate. Chain type steel belt as described in section.