JPH09229156A - Regular/reverse changeover type continuously variable transmission of power roller slide type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple, light, and small transmission device which includes a moving means for a power roller to make gear shift and performs regular/reverse rotation changeover, continuous shifting of regular/reverse rotations, and stop of the rotational drive. SOLUTION: A continuously variable transmission concerned is composed of bevel gears 2, 3, 4, power roller 5, shaft 1, release fork 7, another bevel gear 2 to mesh above and below with the ones 2, 3, 4, and a neutral wheel 6 located in the center of the inner friction surface of the bevel gear 4. The shaft 1 of the power roller 5 is arranged at an angle radially from the center of the neutral wheel 6, and the power roller 5 is pinched by the inner friction surfaces of the bevel gears 2 and 4, and the power roller 5 is slide together with the shaft 1 in the axial direction by the release fork 7, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device that performs three functions of forward / reverse rotation switching drive, forward / reverse stepless speed change, and rotation transmission stop, and can be used as a speed change device in all fields.

[0002]

2. Description of the Related Art Conventional conventional continuously variable transmissions are mainly belt type continuously variable transmissions, toroidal type continuously variable transmissions and the like. It cannot drive or stop rotation transmission. Moreover, the mounting angles of the axes that transmit the rotation are limited to the right angle or the coaxial direction.

[0003]

However, in such a conventional continuously variable transmission, it is a device mainly configured to perform a gear shifting action, and substantially achieves its original purpose of use in combination with other actuating devices. However, if this combined operation, which is complicated and increases in cost, weight, and space, can be performed by the mechanical action of the transmission itself, simplification can reduce cost, weight, and space.

[0004]

In view of the above points, three bevel gears are meshed with each other, and the power roller 5 is sandwiched between the inner friction surfaces of the bevel gears 2 and 4 meshing with each other in the vertical direction, and any one of the three bevel gears is sandwiched. And rotate the power roller 5. Alternatively, rotate the power roller 5 to rotate the three bevel gears. A groove is formed in the inner friction surface of the center of the shaft of the bevel gears 2 and 4, a neutral hole 6 is provided, the shaft 1 of the power roller 5 is arranged at a radial angle from the center of the neutral hole 6, and the power roller 5 is axis-wise. Slide the friction surfaces of the bevel gears 2 and 4 back and forth in the axial direction. By this means, rotation transmission is stopped in the neutral hole 6 and rotation drive switching between forward and reverse is achieved, and the distance from the neutral hole 6 to the power roller 5 is changed to achieve forward and reverse stepless speed change.

[0005]

Thus, in the present invention, as shown in FIG. 1, the bevel gears 2, 3, and 4 are engaged with each other, and the neutral hole 6 is provided on the inner friction surface of the bevel gears 2 and 4 which are engaged vertically. The shaft 1 of the power roller 5 is arranged at a radial angle from the center of the neutral hole 6 (arranged at the radial position indicated by the symbol B), and the power roller 5 is arranged together with the shaft 1
Slide back and forth in the axial direction (symbol A). In FIG. 1, the bevel gear 3 has a rotational force applied thereto.
The bevel gear 3 and the bevel gear 4 are rotated by the rotation in the direction of arrow a.
Rotate in the opposite direction, facing in the direction of the arrow. By this rotating action, the power roller 5 is rotationally driven together with the shaft 1 in the direction of arrow B by the frictional force. While the three bevel gears are rotating, the shaft 1 is slid back and forth in the axial direction (symbol A) by a force such as terrorism of the release fork 7 to move the power roller 5. As a result, the distance from the neutral hole 6 to the power roller 5 is changed,
The same effect that the gears of the gear change steplessly is obtained, and it becomes a low gear near the neutral hole 6 and a high gear near the outer periphery of the friction surface. This continuously variable shifting action is performed by the power roller 5 when a rotating force is applied to the bevel gears 2 and 4, in the vicinity of the neutral hole 6,
High-gear is achieved, and in the vicinity of the outer circumference of the friction surface, a continuously variable shift that is low-gear is obtained.

The rotation transmission is stopped by moving the shaft 1 to move the power roller 5 to the position of the neutral hole 6 as shown in FIG. The frictional resistance between the inner friction surfaces 2 and 4 and the power roller 5 disappears, and the rotation transmission is stopped.

The forward and reverse rotation directions are switched from the center of the neutral hole 6 to the front and back of the shaft 1 by the opposing principle of the rotation directions of the bevel gear 2 and the shaft 4 which rotate up and down. By moving. When the rotation of the power roller 5 in the direction indicated by arrow B at the position shown in FIG. 1 moves to the position shown in FIG. 3, the power roller 5 is rotationally driven in the direction indicated by arrow a. In this way, the rotating force of the bevel gear 2 in the same direction can be freely reversed in the forward and reverse directions by axially sliding (symbol A) from the neutral hole 6 by the release fork 7 of the shaft 1 and the like. This is a continuously variable transmission that can switch rotation drive easily and can achieve three functions: forward and reverse rotation continuously variable transmission and rotation transmission stop. Each figure is a simple summary diagram for explanation. Bevel gears 2, 3, 4 in each figure
Each gear ratio of the power roller 5 and the shaft 1, the material, the case that supports them, the bearing, the device that slides the shaft 1, etc., vary greatly depending on the purpose of use, and the rotation input side and output side of each part The drive transmission device and the drive device are omitted for convenience of explanation.

[0008]

EXAMPLE FIG. 4 shows a sun roller self-reversing drive type fully automatic continuously variable transmission of the sun roller of the present invention, in which the power roller slide type forward / reverse switching continuously variable transmission of the present invention is self-reverse driving. This is an example of a figure that is used for the part to be operated so that the rotation speed of the sun gear that automatically rotates in reverse in proportion to the rotation input can be controlled manually. First, a rotational force is applied to the rotary shaft 8, and a pinion gear 11 that is rotated by a pinion gear shaft 10 supported by a rotary disk 9 integral with the rotary shaft 8 pulls and rotates a belt drive gear 13 and a sun gear 12 in the direction of arrow a. Becomes. At this time, when the number of revolutions of the sun gear 12 is smaller than that of the belt drive gear 13, the belt 17 of the twin belt gear 15 is the same as that of the power roller slide type forward / reverse switching continuously variable transmission of the present invention. Since the worm gear 18 (reverse rotation drive gear) of the shaft 1 of the power roller 5 meshes with the sun gear 12, the pinion gear 11 always causes the belt drive gear 13 to move in the direction of the arrow a of the rotary shaft 8 because it is attached to the bevel gear 2. It will be rotated.
As a result, the belt drive gear 13 rotates and the belt 14
Then, turn the twin belt gear 15 to which the two belts are attached, and turn the drive shaft 16 in the direction of arrow a. By this rotation, the belt 17 attached to the twin belt gear 15 rotates the bevel gear 2. As a result, the bevel gears 3 and 4 rotate,
The power roller, the shaft 1, and the worm gear 18 are rotated in the direction of arrow C, and the sun gear 12 is reversely driven in the direction of arrow B. The reverse drive speed of the sun gear 12 is changed by sliding the shaft 1 (symbol A) with a release fork 7 or the like. When the power roller 5 is moved to the neutral hole 6, the reverse drive of the sun gear 12 is stopped and the rotation of the sun gear 12 is fixed by the gear meshing with the worm gear 18. As a result, the automatic gear shifting action by the differential proportional to the rotation of the sun gear 12 is stopped, and the rotation of the rotary shaft 8 is rotated by the drive gear 16 at a fixed gear ratio of low gear. As a result, it becomes a manual control device that manually changes the automatic transmission of a constant ratio of the sun gear self-reversing drive type fully automatic continuously variable transmission. In the figure, each gear, gear ratio, material, case, frame, bearing that supports each shaft. The device for sliding the shaft 1 varies greatly depending on the purpose of use and is omitted for convenience of explanation.

[0009]

As described above, the gears and clutches of the conventional continuously variable transmission used in combination with other devices can be switched by the transmission itself, resulting in a simple and lightweight transmission.
It can be used as a continuously variable transmission in all fields.

[0010]

[Brief description of drawings]

FIG. 1 is a schematic view of a partial cross section of a power roller slide type / forward / reverse switching continuously variable transmission of the present invention for convenience of explanation.

FIG. 2 is a schematic view of a partial cross section for convenience of explanation, showing a rotational drive stopped state of the power roller 5 of the power roller slide-type forward / reverse switching continuously variable transmission of the present invention.

FIG. 3 is a schematic view of a partial cross section for convenience of explanation, showing a reverse drive state of the power roller 5 of the power roller slide type / forward / reverse switching continuously variable transmission of the present invention.

[FIG. 4] The power roller slide type / forward / reverse switching continuously variable transmission according to the present invention is used for a portion of the sun gear self-reversing drive type / fully automatic continuously variable transmission for which the sun gear is self-reversely driving. However, it is a schematic diagram of a partial cross section for convenience of explanation in the example of the figure used for controlling the rotation speed of the sun gear.

[Explanation of symbols]

1 axis (slides in the axial direction of the power roller) 2 bevel gear (rotates the power roller by rubbing) 3 bevel gear (reverses and rotates the bevel gears 2 and 4 at the same rotation) 4 bevel gear (rubs and rotates the power roller) 5 Power roller (rotates by friction of bevel gears 2 and 4) 6 Neutral hole (bevel gears 2 and 4)
7 Release fork (power roller shaft slides in the axial direction) 8 Rotating shaft (rotation input side integrated with rotating plate) 9 Rotating plate (pinion gear supported integrally with rotating shaft) 10 Pinion gear shaft (on rotating plate) (Supported and integrated) 11 Pinion gear (rotates on the pinion gear shaft) 12 Sun gear (rotates on the rotation shaft center) 13 Belt drive gear (rotates on the rotation shaft center by the force of the pinion gear) 14 Belt (belt drive gear to drive shaft 1)
6 Rotation transmission to 6) 15 Twin belt gears (belts 14 and 17)
16 drive shaft (driven by twin belt gear) 17 belt (turn bevel gear 2 from drive shaft) 18 worm gear (turn sun gear) A Power roller shaft and power roller axial slide B Power roller can be mounted Position a Forward rotation direction b Reverse rotation direction How the worm gear rotates

Claims (1)

[Claims] Engage the three bevel gears. A neutral hole is provided at the center of the friction surface on the inner side of each of the bevel gears that mesh with each other. The shaft of the power roller is arranged at a radial angle from the center of the neutral hole, and the power roller is sandwiched by the inner friction surface of the bevel gear that meshes vertically. The power roller has a structure in which the shaft is slid in the axial direction. The bevel gear that rotatably drives the power roller to rotate is that the rotation direction around the axis is in Sakai
Due to the contradictory rotation principle, the rotation direction of the power roller is positive due to the axial movement before and after the neutral hole.
On the contrary, it is switched and rotated. As the power roller moves axially on the friction surface on the inside of the bevel gear, the distance from the neutral hole to the power roller changes, and the gear wheel gear changes steplessly. In the neutral hole, the friction from the bevel gear disappears and the power roller stops rotating. A power roller slide type / forward / reverse switching continuously variable transmission that is characterized by these three functions.