JPS60155035A - Power transmission v-belt device - Google Patents

Abstract

PURPOSE:To smooth power transmission by setting the center of oscillation of a transmission piece substantially at the center of height of the inclined side thereof. CONSTITUTION:The center 9 of a hole 6c of a transmission piece 6 mounted on pivotal projections 3b of a spanning member 3 is set substantially at the center of the distance between the top surface 6f and the base 6g of the transmission piece 6. In this arrangement, in relation to the face that the pivotal projections 3b of the spanning member 3 are positioned substantially at the center of the thickness of an endless belt, when a V-belt device 1 is fitted in a V-belt pulley 12, no excessive moment which causes the transmission piece 6 to rotate will work, so that power can be transmitted smoothly without loss.

Description

[Detailed Description of the Invention] The present invention provides a V-vehicle for power transmission. The present invention relates to a V-belt device suitable for use in a retro device, particularly a continuously variable transmission.

PRIOR ART As such a V-belt device, for example, a rubber belt with a trapezoidal cross section is used, but its rigidity (lateral rigidity) in the lateral direction, that is, in the direction perpendicular to the length direction, is low, and when it gets caught in the belt center. Since it is bent in the lateral direction, it is not possible to transmit large amounts of power. Bell] -
Since the distance between its top and bottom surfaces is large, it is difficult to obtain a small radius of curvature, and therefore it is difficult to obtain a large range of IH variation.

moreover? A V-bell 1-device consisting of a large number of rigid transmission openings that are penetrated by a metal endless band made of the product of M numbers F4 and can slide in its length direction is also from Publication No. 55-6783. It is well known that when the V-belt device engages with the V-belt width, an extra moment that tries to rotate the transmission side acts, causing smooth movement from the width to the V-belt device to the bell 1. There is a deficiency L1 (that is, power transmission is not performed).

SUMMARY OF THE INVENTION The present invention provides a V-bell device that does not have these points of attachment. In other words, the V-belt device according to the present invention includes a iiJ burned endless belt, a large number of rigid suspension members fixed to the endless belt at right angles to the length direction of the endless belt, and a large number of rigid suspension members, In a cross section perpendicular to the length direction, the V-bell 1 surrounds each suspension part and is supported in a swingable manner by fitting onto pivot projections projecting from the suspension part to both sides. The center of the hole on the transmission side that fits onto the pivoting protrusion of the suspension member is located on both sides. It is located approximately at the center of the distance between the top surface and the bottom surface on the transmission side.

Embodiment FIG. 1 and FIG. fi2 show the present invention 1. The flexible endless belt 2 made of fibers or strings of plants, animals, or synthetic resins has a flexible endless belt 2 which surrounds the top and both sides of the V-belt device 1 and runs along its length. A large number of metal U-shaped suspension members 3 extending at right angles to the endless band 2 are sandwiched between the endless band 2 by studs 5 passing through these portions 2, 3. It is fixed to this. As can be seen from FIG. 1, the straw suspension members 3 are closely spaced (4) in the length direction of the endless band 2. On both sides 3a of 1.1 of the suspension member 3,
A pivoting protrusion 3b is integrally formed with the middle six axes substantially coinciding with the center of the grass of the endless belt 2 and protruding toward the side. A rigid power transmission side 6 made of metal, sintered alloy, ceramic or plastic and having an inclined side surface 6a corresponding to the V-shaped side 11JI2a of the V-shaped wheel 12.
surrounds the suspension member 3 in a cross section perpendicular to the length direction of the endless band 2, and the holes 6c on both sides 61) are fitted onto the pivoting protrusions 3b, so that the suspension member 3 and therefore the endless band 2 It is swingably supported.

As can be seen from the figure, the center 9 of the hole 6c is located approximately at the center of the distance between the top surface 6f and the bottom surface 6g on the transmission side, and therefore approximately at the center of the height of the side surface 6a in FIG.
It almost coincides with the central axis p of b. The diameter of the hole 6c is formed to be slightly larger than the diameter of the rotary hook at the pivot point ti33b, so that play occurs. Both sides 3a of the suspension part 3
Since the mutual distance between the outer surfaces of the transmission side 6 is smaller than the mutual distance between the inner surfaces of both sides 6h of the transmission side 6, (5) A gap 7 is created between them. Note that the mutual spacing between the tips of both pivoting protrusions 3b is selected to be smaller than the mutual spacing between both side surfaces 6a of the transmission side 6, so that the suspension member 3, together with the endless band 2, Even if the protrusion 3b is deflected in the opposite direction, the tip of the protrusion 3b does not protrude from the side surface 6a of the transmission @6. The opening-shaped transmission piece 6 is composed of two almost U-shaped piece pieces 61.6 that are symmetrical with respect to y-y in front of the vertical center of the endless band 2.
2, which are connected to each other by a common pin 8 that is press-fitted into a blind hole 61a+628 extending coaxially from the abutting surface B of the two pieces 61, 62 at the bottom side 6d.

On the top side 6e, both piece pieces 61 and 62 have an abutting surface A.
are butted against each other. As shown in FIG. 3, the power transmission rgJ6 @d taken in the length direction of the endless band 2 is selected to a size such that adjacent transmission sides 6 in the endless band 2 extending straight are in contact with each other. ing. This age d is
From the position 9 above the bottom surface of the endless band 2, that is, the position within the thickness of the endless band 2, Between the sides 6, there is a gap 10 with a royal shape when the endless band 2 is in a straight state.The rate of decrease of this width d is therefore the accumulation of the gap 10 when the endless band 2 has a lower base surface of curvature. The size is selected so that when the bell 1 is wound on the inner side, there is no gap lo at its minimum radius of curvature (Fig. 5).

Figure 4 shows the use of such a V-belt device 1. This continuously variable transmission has a circular nail plate 121 fixedly installed on the human power shaft 11'' and supported on the input shaft II so as to be highly movable in the axial direction. Puko cone 8 folded disc 1
The drive V-bell 1 to wheel 12 consisting of 22 has its conical surface 12
a forms the side wall of the V-shaped groove +2b. Input axis 1! The driven V-belt wheel 14 on the output shaft 130, which is provided parallel to the 141). V-belt device 1
is applied to both V-belts 12 and 14+, and (7) power is transmitted from the input shaft 11 to the output shaft 13.

The transmission @6 of the V-belt device 1 that engages the V-shaped groove 121 of the V-belt +1i12 is connected to the V-shaped groove side wall +2a and the transmission side side wall 6a of the V-belt pulley 12 that connects this transmission side 6. ■Receives the torque of the belt pulley 12 due to the frictional force between the This 1-lux is transmitted to the transmission side 6 where it bites into the driven belt pulley 14 as a tensile force of the endless band 2 on which the suspension member 3 supporting the transmission side 6 is attached.
The signal is then transmitted to the driven V-belt pulley 14 in the same manner as described above.

Effects of the present invention 5 According to this invention, the transmission side of the V-bell 1-device that engages the belt pulley is formed in the shape of an opening, and the compressive force in the direction perpendicular to the length direction of the endless belt is transferred to the transmission side. Since it is supported by the bottom and top sides, it has extremely high buckling strength, and (2) the large blood pressure from the side wall of the V-shaped groove of the belt pulley can be applied to the transmission side. This allows the transmission torque to be increased until the endless belt breaks, making it possible to transmit significantly more power than the conventional rubber (8) belt. In addition, since the endless belt is made of m-cans, it has greater flexibility than a metal endless belt made of laminated strips or a thick rubber belt, and the transmission side can swing freely, so the belt/device can be made with small bends. It is possible to take a large radius, and therefore it is possible to have a wide range of gear ratios. Moreover, since the endless belt is Fa-Lee-B by the suspension member and is further surrounded by the rigid transmission side, the V
Surfaces 1 and 3 of the character-shaped grooves are not supported at all, and it is only necessary to design the surface by considering only the tension. The suspension member is placed in front of the endless band, and the transmission side does not come into contact with the endless band at all, so there is no relative movement between the endless band and the suspension member or the transmission side, thus eliminating friction loss and improving power transmission efficiency. can be further increased. In addition, since the center of swing on the transmission side is located approximately at the center of the height of the inclined side surface, the V-belt device is located approximately at the center of the thickness of the endless belt, so that When it gets caught in the belt pulley, the extra moment that tries to rotate the transmission side (9) does not act, and the temperature increases.
There is no power loss and power can be transmitted smoothly.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the V-belt device according to the present invention with the transmission side removed, Fig. 2 is a cross-sectional view of the V-belt device at an angle of 5 x 1 α in the longitudinal direction, Fig. 3 is a side view, and Fig. 4 is a V-belt device with the transmission side removed. FIG. 5 is a block diagram of a continuously variable transmission using a belt device; FIG. DESCRIPTION OF SYMBOLS 1... V-belt device, 2... Endless belt, 3... Suspension member, 3b... Pivoting projection, 6... Transmission side, 6a.
... Side, 6b... Side, 6C... Hole, 6f...
Top surface, 6g---bottom surface, +2. +4--- V He, +
b car, 12b. +4b...V-shaped groove (10)

Claims (1)

[Claims] 1. A V-belt device that is routed around a V-belt wheel is i'j
l + fired endless belt, a large number of rigid suspension parts fixed to this endless belt at an angle of 1α with respect to the length direction of the endless belt, and each suspension part in a cross section perpendicular to the length direction of the endless belt. The attachment is wrapped around σH and is swingable by being fitted onto pivot protrusions projecting from the suspension member to both sides, and is supported by the V bell 1 to V of the city.
It consists of a rigid transmission piece with an almost square shape with an inclined side surface that can be engaged with a groove, and the center of the hole of the transmission piece that fits into the suspension part is A V-belt device for power transmission, characterized by being located approximately at the center of the distance between the top and bottom surfaces of a transmission piece. 2. The device according to claim 1, wherein the central axis of the pivot plate is located approximately at the center of the thickness of the endless band. 3. The device according to claim 1, wherein the square-shaped transmission piece is composed of two nearly U-shaped pieces that are symmetrical with respect to the longitudinal center plane of the endless band. . Claim 1, characterized in that 42 fuzzy U-shaped pieces are connected to each other at their bases.
The device described in item 5 or item 3. The two piece pieces each have a blind hole extending coaxially from the abutting surface on the bottom side, and are assembled into a transmission piece by a common pin that is press-fitted into each of these blind holes. An apparatus according to claim 4, characterized in that: