JPH0639159Y2 - Mechanical continuously variable transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a plurality of cone discs that are splined to a swingable spline shaft, and a flange disc that is pressed against the cone discs to transmit rotation. The present invention relates to a mechanical continuously variable transmission including a continuously variable transmission, and more specifically, to an improvement in an input mechanism thereof.

(Prior Art) Conventionally, a mechanical continuously variable transmission as shown in FIG. 3 and FIG. 4 is known, and this continuously variable transmission is configured as follows.

An input shaft gear 22 is provided at one end of the input shaft 21, and a plurality of swing center gears 23 that mesh with the input shaft gear 22 are provided. Swing gears that mesh with each swing center gear 23
24 is provided, and a swing link mechanism 25 that swings the swing gear 24 along the outer periphery of the swing center gear 23 is provided. A feed screw 26 and a handle 27 for operating the swinging link mechanism 25 are provided. Each oscillating gear 24 is fixed to a spline shaft 28, and a plurality of cone disks 29 are spline-coupled to the spline shaft so as to be axially oscillatable and rotatable. A plurality of flange disks 31 pressed by springs 30 in a direction in which they are pressed against each other are spline-coupled to a rotary cylinder shaft 32,
The flange disk 31 is rotatably pressed against the cone disk 29 and transmitted in rotation. The rotary cylinder shaft 32 is an output shaft 33.
Is bound to.

(Problems to be solved by the invention) However, in the above-described conventionally known mechanical continuously variable transmission, the mechanism of the input section is composed of the gear train such as the input shaft gear 22, the swing center gear 23, and the swing gear 24. Therefore, there is a problem that noise due to meshing is great and quiet operation is difficult.

An object of the present invention is to provide a mechanical continuously variable transmission including a continuously variable transmission including a swingable cone disc and a flange disc that is pressed against the cone disc to transmit rotation. It is to try to reduce.

(Means for Solving the Problems) In order to achieve the above object, a mechanical continuously variable transmission according to the present invention is provided with an input shaft, an input shaft roller provided on the input shaft, and an input shaft roller. An oscillating center roller that is pressed and rotatably provided, and an oscillating roller that is rotatably provided in pressure contact with the oscillating center roller and that is oscillatably provided along the outer periphery of the oscillating center roller. A spline shaft rotatably provided integrally with the rocking roller, a plurality of cone discs slidably provided on the spline shaft and spline-coupled rotatably integrally with the spline shaft, and the cone disc It is composed of a flange disk that is pressed against and transmitted for rotation, and an output shaft that rotatably supports the flange disk.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Since the feature of the present invention is the input unit, only the input unit is shown here.

An input shaft 1 is rotatably provided in a casing 3a via a bearing 2, and an input shaft roller 4 is fixed to one end of the input shaft 1. The outer peripheral surface of the input shaft roller 4 is formed in a drum shape. A plurality of swing center rollers 5 that are pressed against the input shaft roller 4 via an oil film are provided, and the swing center rollers 5 are rotatably provided on the fixed shaft 7 via bearings 6. . The fixed shaft 7 is fixed to the casing 3b, and the outer peripheral surface of the swing center roller 5 is curved so as to match the drum-shaped outer peripheral surface of the input shaft roller 4. Further, a cylindrical guide portion 5a is provided on the swing center roller 5 in a protruding manner, and a pressing disc 13 and a pressing disc spring 14 described later are attached to the guide portion 5a.

A swing roller 8 is provided which is pressed against the swing center roller 5, and the swing roller 8 is pressed against the swing center roller 5 via an oil film. The outer peripheral surface of the rocking roller 8 is formed in a drum shape so as to fit the curved outer peripheral surface of the rocking center roller 5. Each swing roller 8 is fixed to a spline shaft 9 that holds a cone disk, which will be described later,
One end of the spline shaft 9 is connected to a swinging link via a bearing 11.
It is rotatably supported at one end of 11. The swing link 11 is swingably supported by the fixed shaft 17 via a bearing 12, and the swing link 11 is swung by a swing operation mechanism (not shown).

A cone disc (not shown) is spline-coupled to the spline shaft 9, and the structure of the flange disc and the transmission mechanism are the same as those of the known continuously variable transmission mechanism shown in FIGS.

In addition, the cylindrical guide portion protruding from the swing center roller 5
A pressing disc 13 is slidably attached to the 5a, and the outer periphery of the pressing disc 13 is curved so as to fit the drum-shaped outer peripheral surfaces of the input shaft roller 4 and the swing roller 8. Further, a pressing disc spring 14 for pressing the input shaft roller 4 and the oscillating roller 8 against the oscillating center roller 5 is attached to the guide portion 5a via the urging disk 13. .

The present embodiment configured as described above operates as follows.

The input shaft roller 4 rotates integrally with the input shaft 1, and the rotation is transmitted to each swing center roller 5 which is in pressure contact with the input shaft roller 4, and the rotation is transmitted from the swing center roller 5 to the swing roller 8. Then, the spline shaft 9 is rotated integrally with the swing roller 8, the cone disc is rotated integrally with the spline shaft 9, and similarly to a known continuously variable transmission, the cone disc is speed-changed to the flange disc to transmit the rotation, and the flange is transmitted. Rotation is transmitted from the disc to the output shaft.

In this way, since the input unit that transmits the rotation to the transmission unit is transmitted by the contact rotation between the rollers, noise can be reduced.
Further, the pressing disc spring 14 presses the input shaft roller 4 and the rocking roller 8 against the rocking center roller 5 through the pressing disk 13 to improve the rotation transmission efficiency between the rollers. ing.

When changing the reduction ratio, the swinging mechanism 11 swings the swinging link 11 to move the swinging roller 8 along the outer circumference of the swinging center roller 5, as in the known continuously variable transmission. This displaces the contact position of the cone disc with the flange disc.

(Effect of the Invention) According to the present invention described above, the following effects can be obtained.

Since the input portion is composed of rollers such as an input shaft roller, a swing center roller, and a swing roller, the noise generation level is lower than that of the conventional gear.

Further, in the case where an oil film is provided on the contact surface of the roller, the noise generation level can be further reduced.

Further, the pressing disc spring attached to the swing center roller pushes the input shaft roller and the swing roller against the swing center roller, thereby improving the rotational transmission efficiency between the rollers.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an essential part of one embodiment of the present invention,
The BB sectional drawing of FIG. 2 is shown. FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 3 is a vertical sectional view of a conventional example. FIG. 4 is a sectional view taken along the line CC of FIG. 1: Input shaft, 4: Input shaft roller 5: Swing center roller, 8: Swing roller 9: Spline shaft, 28: Cone disc 31: Flange disc, 34: Output shaft

Claims (2)

[Scope of utility model registration request] 1. An input shaft, an input shaft roller provided on the input shaft, a swing center roller rotatably provided in pressure contact with the input shaft roller, and in pressure contact with the swing center roller. An oscillating roller rotatably provided and oscillating along the outer periphery of the oscillating center roller, a spline shaft integrally rotatably provided with the oscillating roller, and sliding on the spline shaft. A plurality of cone discs that are freely provided and spline-coupled to the spline shaft so as to rotate together; a flange disc that is pressed against the cone discs to transmit rotation; and an output shaft that rotatably supports the flange discs. A mechanical continuously variable transmission characterized by comprising: 2. A mechanical disc according to claim 1, wherein a disc spring for pressing the input shaft roller and the swing roller against the swing center roller is provided on the swing center roller. Gearbox.