JPH0732250U - One-way clutch type continuously variable transmission - Google Patents

Abstract

(57) [Abstract] [Purpose] To facilitate control of the rotation transmission direction switching mechanism of the one-way clutch of the one-way clutch type continuously variable converter, reduce wear due to rotation friction, and to achieve a compact structure. To do. A switching shaft 42 is axially slidably disposed in a central shaft hole of the output shaft 24, and the switching shaft 42 rotates in conjunction with the rotation of the output shaft 24. When the switching shaft 42 moves in the protruding direction, the tube body 40 rotatably fitted to the output shaft 24 rotates with this movement, and this rotation causes the rotation transmission of the one-way clutch mechanism 28 fitted to the output shaft 24. The direction is switched to one of the two directions. As a result, the one-way clutch mechanism 28 transmits the rotation of the input shaft 10 in one direction to the output shaft 24. Further, when the switching shaft 42 moves in the backward direction, the rotation transmission direction of the one-way clutch mechanism 28 is switched to the other of the two directions,
The rotation of the input shaft 10 in the other direction is transmitted to the output shaft 24. The switching shaft 42 is connected to a lot 54 of an air cylinder 52 via a ball bearing 58, and is axially driven by the air cylinder 52.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a one-way clutch type continuously variable transmission capable of continuously adjusting the rotation of an input shaft from zero rotation to the maximum rotation and outputting the same to an output shaft.

[0002]

[Prior art]

 When the input shaft rotates, the eccentric link fixed to it cranks, reciprocates the transmission link via the connecting rod, and this reciprocating motion is converted into rotary motion again by the one-way clutch, and as a result, the output shaft rotates. A one-way clutch type continuously variable transmission, which has a mechanism for doing so, is conventionally known. This continuously variable transmission has a switching shaft for switching the direction of the output shaft, and the transmission direction of the one-way clutch mechanism is switched by moving the switching shaft in the axial direction. The drive of the switching shaft in the axial direction is performed by connecting the output side of a drive source such as a motor to the switching shaft 6 via a rack gear 2 and a pinion 4 meshing with the gear as shown in FIG. The rotation of the pinion 4 rotates the pinion 4 in the forward and reverse directions, thereby driving the switching shaft 6 in the axial direction (left-right direction).

[0003]

[Problems to be solved by the device]

 As described above, in the case of the structure in which the rack gear and the pinion are meshed with each other, if the swing angle adjusting screw is loosened, the rotation of the switching shaft that interlocks with the output shaft causes the rack gear and the pinion to wear. In addition, there is a defect that it is not easy to assemble with an external drive source for rotating the switching shaft, its adjustment is difficult, and the size becomes large as a whole. The present invention aims to eliminate the above defects.

[0004]

[Means for solving problems]

 In order to achieve the above object, the present invention provides a case 8, an input shaft 10 rotatably supported by the case 8, an output shaft 24 rotatably supported by the case 8, and the input shaft described above. 10, an eccentric link 12 connected so as to make a crank motion, a connecting rod 13 connected to the eccentric link 12, a transmission link 38 having one end rotatably connected to the connecting rod 13, and the connecting rod 13 A speed change link 20 whose one end is rotatably connected coaxially to the transmission link 38, a speed change lever shaft 14 which supports the other end of the speed change link 20 so as to be swingable along a predetermined track, and the output. An outer ring 30 fitted on the shaft 24 is rotatably connected to the other end of the transmission link 38, and a one-clutch mechanism 28, and the rotation transmission direction of the one-clutch mechanism 28 is switched between two directions by axial movement. The input shaft 10 is provided with a switching shaft 42 slidably fitted in the shaft hole of the force shaft 24 so as to be interlocked with the output shaft 24 in a rotational direction, and the input shaft 10 is continuously rotated from zero rotation to maximum rotation. In the one-way clutch type continuously variable transmission capable of being adjusted to be output to the output shaft 24, an air cylinder 52 is fixed to the case 8, and the lot 54 of the air cylinder 52 and the switching shaft 42 are connected to each other. Via a ball bearing ring 58 on a coaxial line.

[0005]

[Action]

 The rotation of the output shaft 24 and the switching shaft 42 that interlocks with the rotation direction is supported by a ball bearing 58. Therefore, the rotational friction of the switching shaft 42 is reduced, and the problem of wear does not occur. Further, since the lot 54 of the air cylinder 52 is coaxially connected to the switching shaft 42, the whole is compact and the assembling is easy.

[0006]

【Example】

 Hereinafter, the configuration of the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. Reference numeral 8 is a case of a one-way clutch type continuously variable transmission (trade name: Xerox), 10 is an input shaft rotatably supported by the case 8, 12 is four eccentric links fixed to the input shaft 10, and 13 is A connecting rod connected to the eccentric link 12, 14 is a speed change lever shaft rotatably supported by the case 8, 16 is a support frame fixed to the lever shaft 14, and 18 is eccentric from the rotation center of the support frame 16. It is a fulcrum shaft supported at the position.

One end of a speed change link 20 is rotatably supported by the fulcrum shaft 18, and the other end of the speed change link 20 is rotatably supported by the connecting rod 13. When the gear shift lever 22 is swung and the gear shift lever shaft 14 is rotated, the support frame 16 connected to the gear shift lever shaft 14 is rotated, and along with this rotation, the fulcrum shaft 18 is maintained in a predetermined horizontal direction. It is configured to be vertically displaced along the track.

Reference numeral 24 denotes an output shaft rotatably supported by the case 8, and a notch surface 26 is formed on the outer peripheral surface of the output shaft in three directions. Reference numeral 28 denotes a one-way clutch mechanism, which includes an outer ring 30 fitted to the output shaft 24, a direction switching piece 32, a roller 34, and a spring 36.

Reference numeral 38 denotes a transmission link, one end of which is connected to the lower portion of the outer ring 30 and the other end of which is connected to the connecting rod 13. Reference numeral 40 denotes a tubular body, which is rotatably fitted to the outer peripheral surface of the output shaft 24 so as not to be displaced in the axial direction.

A switching shaft 42 is slidably fitted in a shaft hole formed at the center of the output shaft 24. A pin 44 is provided so as to project at a right angle to the switching shaft 42. The pin 44 is formed on the output shaft 24 in a slit 46 formed in the axial direction and on the peripheral wall of the tubular body 40 at an angle. It is slidably fitted in the slit 48.

The tubular body 40 and the direction switching piece 32 are connected by three shafts 50. Reference numeral 52 is a stroke-adjustable double-acting air cylinder, which is fixed to the case 8. A cylinder 56 is fixed to the lot 54 of the air cylinder 52 by a bolt 55, and one end of the switching shaft 42 is rotatably connected to the cylinder 56 via a ball bearing 58 so as not to shift in the axial direction. ing.

The movement stroke of the air cylinder 52 is regulated by a stopper, and the mounting position of this stopper is adjusted when the continuously variable transmission is assembled. Reference numeral 60 denotes a steel ball for locking the switching shaft, which is arranged in a hole formed in the output shaft 24, and is urged by a spring 62 in a direction of elastically contacting the outer peripheral surface of the switching shaft 42.

Two index recesses 64 and 66 are formed in the switching shaft 42 at positions corresponding to the steel balls 60. Next, the operation of this embodiment will be described. First, the outline of the shift principle of the one-way clutch type continuously variable transmission will be described with reference to FIGS.

When the input shaft 10 rotates, the eccentric link 12 makes a crank motion, and the connecting rod 13 makes a reciprocating motion. The speed change link 20 is interlocked with the speed change lever shaft 14, and the fulcrum of the speed change link 20, that is, the position of the fulcrum shaft 18 is changed by the angular displacement of the speed change lever 22 fixed to the speed change lever shaft 14.

On the other hand, on the output shaft 24 side, the outer ring 30 of the one-way clutch mechanism 28 and the connecting rod 13 are interlocked via a transmission link 38. When the speed change lever 22 is set to the zero (rotational) position, the fulcrum of the speed change link 20 becomes A, and the connecting rod 13 and the transmission link 38 move up and down around this fulcrum A.

However, since the outer ring 30 is not displaced by angularly swinging it, the output shaft 24 does not rotate even if the input shaft 10 rotates. When the speed change lever 22 is moved in the direction of the maximum rotation position as shown in FIG. 4, the fulcrum of the speed change link 20 is moved in the direction B, and the connecting rod 13 and the transmission link 38 are moved laterally (inclined) about this fulcrum. Will be done.

Therefore, the outer ring 30 is subjected to a displacement for angularly swinging the outer ring 30, and the displacement increases as the shift lever 22 shifts in the maximum rotation direction. As a result, the output shaft 24 rotates to shift the gear. Will be done. Next, the operation of switching the rotation transmission direction of the one-way clutch mechanism 28 will be described with reference to FIGS.

When the lot 54 of the air cylinder 52 is projected and the steel ball 60 is fitted in the index concave portion 64 of the switching shaft 42, the direction switching piece 32 is in a state of being rotated leftward in FIG. The roller 34 is in pressure contact with one side of the cutout surface 26 of the output shaft 24 and the inner peripheral surface of the clutch outer ring 30 by the elastic force of the spring 36.

Therefore, during the left and right swinging motion of the lower part 30 a of the clutch outer ring 30 due to the leftward rotation of the input shaft, the swinging motion in the right direction is transmitted to the output shaft 24 via the roller 34. The output shaft 24 rotates only in the left rotation direction in FIG. When the input shaft is rotated to the right and the output shaft 24 is to be rotated in the clockwise direction, the cylinder driving device (not shown) drives the air cylinder 52 to move the lot 54 backward to move the steel ball 60. The index recess 66 of the switching shaft 42 is fitted.

When the switching shaft 42 retracts to the right in the figure, the pin 44 moves to the right in the slits 46 and 48 in FIG. At this time, the tubular body 40 is rotated by the engagement of the pin 44 and the slit 48, and this rotation is transmitted to the direction switching piece 32 via the connecting shaft 50, and the direction switching piece 32 is moved to the direction switching piece 32 in FIG. , Rotate to the right.

As a result, the roller 34 is not easily inserted between the other side of the cutout surface 26 of the output shaft 24 and the inner peripheral surface of the clutch outer ring 30, and the lower portion 30a of the clutch outer ring 30 swings to the left in the figure. Only the dynamic motion is transmitted to the output shaft 24 via the roller 34, and the output shaft 24 rotates to the right in FIG.

[0022]

【effect】

 In the present invention, as described above, since the lot of air cylinders is connected to the switching shaft through the ball bearings, the problem of gear wear does not occur. In addition, the whole structure can be made compact, and the assembling can be facilitated, and at the same time, any troubles due to improper adjustment can be prevented.

[Brief description of drawings]

FIG. 1 is an overall plan sectional view of the present invention.

FIG. 2 is a side view of a mechanism that converts linear movement of a switching shaft into rotational movement.

FIG. 3 is an explanatory diagram showing the principle of a one-way clutch type continuously variable transmission.

FIG. 4 is an explanatory diagram showing the principle of a one-way clutch type continuously variable transmission.

FIG. 5 is an explanatory diagram showing the principle of a one-way clutch mechanism.

FIG. 6 is an explanatory diagram showing the principle of a one-way clutch mechanism.

FIG. 7 is a cross-sectional view of a conventional technique.

[Explanation of symbols]

 2 rack gears 4 pinion 6 switching shaft 8 one-way clutch type continuously variable transmission case 10 input shaft 12 eccentric link 14 speed change lever shaft 16 support frame 18 fulcrum shaft 20 speed change link 22 speed change lever 24 output shaft 26 notch surface 28 one way Clutch mechanism 30 Outer ring 32 Direction switching piece 34 Roller 36 Spring 38 Transmission link 40 Tubular body 42 Switching shaft 44 pin 46 Slit 48 Slit 50 Shaft 52 Air cylinder 54 Lot 56 Cylindrical body 58 Ball bearing 60 Steel ball 62 Spring 64 Index recess 66 Index recess

Claims (1)

[Scope of utility model registration request] 1. A case (8), an input shaft (10) rotatably supported by the case (8), and the case (8).
An output shaft (24) rotatably supported by the eccentric shaft, an eccentric link (12) connected to the input shaft (10) for crank motion, and a connecting rod (13) connected to the eccentric link (12). ), A transmission link (38) whose one end is rotatably connected to the connecting rod (13), and the connecting rod (13).
A transmission link (20) having one end rotatably connected to the transmission link (38) coaxially with the transmission link (38);
0) the other end of the transmission link (38) is composed of a speed change lever shaft (14) that supports the other end of the transmission link (38) so as to be swingable along a predetermined track, and an outer ring (30) fitted to the output shaft (24). And a one-clutch mechanism (28) rotatably connected to the one-clutch mechanism (28) and slidably in a shaft hole of the output shaft (24) for switching the rotation transmission direction of the one-clutch mechanism (28) to two directions by axial movement. The output shaft (24) and a switching shaft (42) fitted and arranged so as to interlock with the rotation direction are provided, and the rotation of the input shaft (10) is adjusted steplessly from zero rotation to maximum rotation to output the output. In a one-way clutch type continuously variable transmission capable of outputting to a shaft (24), an air cylinder (52) is fixedly mounted on the case (8), and the lot (54) of the air cylinder (52) and the Switching shaft (42)
A one-way clutch type continuously variable transmission characterized in that and are connected on a coaxial line through a ball bearing (58).