JPH0240143B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a belt-type continuously variable transmission, and more particularly to a continuously variable transmission pulley attached to a drive shaft and a driven shaft, and a belt-type continuously variable transmission. The present invention relates to a continuously variable transmission comprising a V-belt and a V-belt.
Here, a continuously variable speed pulley refers to a pulley that has two discs with their truncated conical surfaces facing each other, and at least one disc is pressed against the other disc by a spring, hydraulic pressure, etc. shall be taken as a thing.

Conventional technology and its problems In belt type continuously variable transmission with constant distance between shafts, 2
It is customary to use one of the variable speed pulleys as a pulley whose pitch diameter can be forcibly changed. In many conventional examples, the pitch diameter of only a specific speed change pulley, for example, a speed change pulley on a drive shaft, can be forcibly changed. However, it may be necessary to forcibly change the pitch diameter of another speed change pulley during use. For example, there may be a case where it is desired to rapidly increase the rotation speed of the driven speed change pulley. Conventional continuously variable transmissions of this type required a fairly complex mechanism in order to be able to arbitrarily select a pulley whose pitch diameter could be forcibly changed. Furthermore, a mechanism capable of simultaneously changing the speed of multiple rows of speed change pulleys is more complicated and poses various problems in practical use.

Purpose of the Invention The object of the present invention is to provide a pulley that can forcefully change the pitch diameter of either the speed change pulley on the drive shaft or the speed change pulley on the driven shaft, quickly and reliably by selecting either one of the speed change pulley on the drive shaft and the speed change pulley on the driven shaft as necessary. The object of the present invention is to provide a belt-type continuously variable transmission which is particularly suitable for a belt-type continuously variable transmission of a constant distance between shafts equipped with a plurality of rows of pulleys.

Structure of the Invention The above object of the present invention is to provide a drive side continuously variable speed pulley on a drive shaft, a driven side continuously variable speed pulley on a driven shaft arranged parallel to the drive shaft, and both continuously variable speed pulleys. A belt-type continuously variable transmission using a suspended V-belt, which is supported reciprocatingly in a direction perpendicular to a plane defined by the drive shaft and the driven shaft, and the drive shaft and the driven shaft are continuously variable transmissions. The first one located in the middle of the pulley
a straight rod and a second straight rod, and a first straight rod that is attached to the first straight rod and is rotatable around the drive shaft direction and is moved into and out of contact with the outer surface of the V-belt on the drive side continuously variable speed pulley. and a second wheel that is attached to the second straight rod, is moved toward and away from the outer surface of the V-belt on the driven-side continuously variable speed pulley, and is rotatable around the driven shaft direction. This is achieved by a belt-type continuously variable transmission characterized by the following.

Embodiments The construction of the belt-type continuously variable transmission of the present invention will be described below with reference to embodiments shown in the accompanying drawings.

Referring to FIGS. 1 and 2, a driving side continuously variable speed pulley 3 attached to the drive shaft 1, a driven side continuously variable speed pulley 4 attached to the driven shaft 2, and a pair of continuously variable speed pulleys 3 , 4, a continuously variable transmission pulley 3' on the drive shaft 1, and a driven shaft 2.
This is a composite type continuously variable transmission in which a second belt type continuously variable transmission 10B consisting of an upper continuously variable transmission pulley 4' and a V belt 5' which is hung around a pair of continuously variable transmission pulleys 3' and 4' are arranged in parallel. A stepped transmission 10 is shown. As shown in FIG. 2, the second belt type continuously variable transmission 10B is arranged symmetrically to the first belt type continuously variable transmission 10A with respect to the vertical plane XX and has the same structure, so in the following description, 1 belt type continuously variable transmission 10
Only A will be explained.

Two vertical straight rods 8 and 9 connect the drive shaft 1 and the driven shaft 2.
A pair of continuously variable speed pulleys 3 and 4 are supported reciprocally in a direction perpendicular to a plane YY defined by
They are placed in the middle of each other and are lined up next to each other. The first straight rod 8 is equipped with a suitable handle (not shown) and is raised and lowered by use of the handle, and the actuating lever 11 is a curved rod extending above the plane YY and parallel to the plane YY. A wheel 13 is attached to the free end of the operating lever 11 and is capable of coming into contact with the outer surface of the V-belt 5 in the V-shaped groove of the drive-side continuously variable speed pulley 3. The wheel is rotatable about an axis parallel to the drive shaft 1. 1st straight rod 8
and the actuating lever 11 constitute the drive-side control lever 6. Therefore, the wheel 13 is moved in the radial direction of the continuously variable pulley 3 by the raising and lowering movement of the control lever 6, thereby increasing the width of the V-groove via the V-belt 5, and increasing the width of the V-groove by the spring 16. The width is reduced.

The second straight rod 9 is located below the plane YY.
An actuating lever 12 extending parallel to the actuating lever 12 is attached to the free end of the actuating lever 12, and a wheel 14 that can come into contact with the outer surface of the V-belt 5 in the V-shaped groove of the driven continuously variable speed pulley 4 is attached. There is. The wheel is rotatable about an axis parallel to the driven shaft 2. Second
The straight rod 9 and the operating lever 12 constitute the control lever 7 on the driven side. The second straight rod 9 is connected to a drive mechanism (not shown) controlled by a computer, and the driven side changes its position every moment in response to the increase in the width of the V-shaped groove of the drive side continuously variable speed pulley 3. The operating lever 12 is driven so as to hold the wheel 14 of the actuating lever 12 in a close position facing the outer surface of the V-belt within the continuously variable speed pulley 4. That is, when the width of the V-shaped groove of the pulley 4 decreases, the wheel 14 changes its position from moment to moment in response to the position of the wheel 13, but always moves to the opposite side adjacent to the outer surface of the V-belt in the driven continuously variable speed pulley 4. placed in position. Therefore, V in the driven side continuously variable speed pulley 4
When it becomes necessary to control the position of the belt 5, the V-belt can be placed at the desired position immediately by pressing the wheel 14 against the outer surface of the V-belt 5 in the V-shaped groove, and the rotation speed of the driven shaft 2 can be controlled. can be rapidly increased. At this time, the actuating lever 11 is controlled so that the drive-side wheel 13 is always held at a close position facing the outer surface of the V-belt 5 in the drive-side continuously variable transmission pulley 3. Reference numeral 15 denotes a casing surrounding the first and second straight rods 8 and 9, and is provided with a slit (not shown) for raising and lowering the operating levers 11 and 12.

3, 4 and 5 show a modification of the embodiment shown in FIGS. 1 and 2, in which the continuously variable speed pulleys 3 and 4 on the drive side and the driven side are actually operated by the operating lever 28 on the driven side.
Even if it is attached to the first straight rod 26 that drives the driving side operating lever 27, the position of the wheel 30 of the driven side operating lever 28 does not have a large error compared to the position of the wheel 14 in FIG. 1 under computer control. This is what was used. The single straight rod 26 shown in FIG. 3 corresponds to a combination of the two straight rods 8 and 9 shown in FIG. An operating lever 27 is attached to the upper end of the single straight rod 26, and a wheel 29 that can come into contact with the outer surface of the V-belt 25 in the V-shaped groove of the drive-side continuously variable transmission pulley 23 is attached to the free end of the operating lever 27. There is. Further, a driven-side operating lever 28 is attached to a portion adjacent to the lower end of the single straight rod 26, and the free end of the operating lever 28 can come into contact with the outer surface of the V-belt 25 in the V-shaped groove of the driven-side continuously variable speed pulley 4. wheels 30 are attached. An electric motor 31 is connected to the lower end of the single straight rod 26 via a pair of bevel gears 32 and 33. Therefore, when the wheel 29 of the driving-side operating lever 27 is brought into contact with the outer surface of the V-belt 25 in the V-shaped groove of the driving-side continuously variable transmission pulley 23 due to the operation of the electric motor 31, the driven-side operating lever 28 is wheel 3
0 is the V that is hung on the continuously variable speed pulley 24 on the driven side.
It is held in a position facing the surface of the belt, and is placed in a position where it can immediately control the V-belt from the driven side if necessary. Therefore, in the position shown in FIG. 3, when the driven wheel 30 is brought into contact with the outer surface of the V-belt 25 in the V-shaped groove of the continuously variable speed pulley 24 by the operation of the electric motor 31, the driving wheel 29 is not operated. The V-belt 5 can be separated from the V-belt 5 in the variable speed pulley 23 and controlled from the driven side.

6, 7 and 8 show another modification of the embodiment of FIGS. 1 and 2, in which the two straight rods 8, 9 of FIG.
are combined to form one straight rod 47, and an operating lever 48 and a wheel 50 for controlling the position of the V-belt 45 in the drive-side continuously variable transmission pulley 43 are attached to the upper end of the straight rod 47, and the wheel 50 is driven at a position adjacent to the lower end. This embodiment is the same as the embodiment shown in FIG. 3 in that an operating lever 49 for controlling the position of the V-belt 45 in the side continuously variable transmission pulley and a wheel 51 are attached.

The embodiments shown in FIGS. 6, 7 and 8 differ from the embodiment shown in FIG. 3 in that the upper end of the straight rod 47 is connected to a piston 53 of a hydraulic drive mechanism 52.

Effects of the Invention The effects of the present invention are achieved by a straight rod that is reciprocably supported between the continuously variable speed pulleys on the driving side and the driven side.
Multiple rows of Vs hung on multiple pairs of continuously variable speed pulleys
A compound automatic transmission consisting of a large number of continuously variable transmissions arranged in parallel, which adjusts the position of each speed change pulley of the belt in the V-shaped groove from both the driving side and the driven side to maintain the rotational speed of the driven shaft at a desired value. It is possible to obtain a control mechanism suitable for a step-change transmission, which has a simple structure and is manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention;
2 is a plan view of the device shown in FIG. 1, FIG. 3 is a side view showing a modified embodiment of the device shown in FIG. 1, and FIG. 4 is a plan view of the device shown in FIG.
5 is an end view of the modified embodiment of FIG. 3, FIG. 6 is a side view of another modified embodiment of the device of FIG. 1, and FIG. 7 is a top view of the modified embodiment of FIG. FIG. 8 is a plan view of the modified embodiment shown in the figure, and FIG. 8 is an end view taken along line - of the modified embodiment of FIG. 1... Drive shaft, 2... Driven shaft, 3, 3'... Drive side continuously variable speed pulley, 4, 4'... Driven side continuously variable speed pulley, 5, 5'... V belt, 6... Drive control lever, 7... Driven side control lever, 8... First
Straight rod, 9... Second straight rod, 10... Device of the present invention,
11...First operating lever, 12...Second operating lever, 13...Wheel, 14...Wheel, 15...Wheel, 16...Spring, 20...First modified embodiment, 2
1... Drive shaft, 22... Driven shaft, 23, 23'...
... Drive side continuously variable speed pulley, 24, 24'... Driven side continuously variable speed pulley, 25, 25'... V belt,
26... Straight rod, 27... First operating lever, 28...
... Second operating lever, 29 ... Wheel, 30 ... Wheel, 31 ... Drive motor, 32, 33 ... Bevel gear, 40 ... Second modified embodiment, 41 ... Drive shaft,
42... Driven shaft, 43, 43'... Driving side continuously variable speed pulley, 44, 44'... Driven side continuously variable speed pulley, 45, 45'... V belt, 46... Control lever, 47... Straight rod, 48...first operating lever,
49...Second operating lever, 50...Wheel, 51...
...Wheel, 52...Hydraulic cylinder, 53...Piston.

Claims (1)

[Scope of Claims] 1. A drive-side continuously variable speed pulley on a drive shaft, a driven-side continuously variable speed pulley on a driven shaft arranged parallel to the drive shaft, and a continuously variable speed pulley on both of the above-mentioned continuously variable speed pulleys. A belt-type continuously variable transmission using a V-belt, which is supported reciprocatingly in a direction perpendicular to a plane defined by the drive shaft and the driven shaft, and is located between the two continuously variable transmission pulleys. A first straight rod and a second straight rod are arranged, and a first straight rod is attached to the first straight rod and is moved toward and away from the outer surface of the V-belt on the drive side continuously variable speed pulley in the direction of the drive shaft. a first wheel that is rotatable around the driven shaft, and a first wheel that is attached to the second straight rod and is moved toward and away from the outer surface of the V-belt on the driven continuously variable speed pulley and is rotatable around the driven shaft direction. A belt type continuously variable transmission characterized by having two wheels. 2. The belt type continuously variable transmission according to claim 1, wherein the first wheel and the second wheel are arranged on opposite sides of the plane. 3. Claim 2, wherein the first straight rod and the second straight rod are combined into one straight rod.
The belt-type continuously variable transmission described in .