JP2512913Y2 - Belt type continuously variable transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a belt type continuously variable transmission used in automobiles, agricultural machines, general industrial machines and the like.

(Prior Art) Generally, a belt type transmission is a system in which both a driving side pulley and a driven side pulley are opened and closed, and moreover, a movable sheave is forcibly opened and closed for one of the pulleys.
It is known that the movable sheave of the other pulley is linked with it to shift gears, and an opening / closing operation mechanism for opening and closing the one pulley is fixed on the pulley (sheave) via a bearing. There is.

Specifically, as shown in FIG. 5, a handle 102 to which a rotary scale plate 101 is attached is rotatably fitted in a scale casing 103, and a pulley is mounted on a shaft 104 fixed to the handle 102 via a bearing 105. The movable sheave 107 of 106 has a fixed sheave 109 attached to the graduation casing 103 via a bearing 108, or as shown in FIG.
A bearing case 204 is attached to a movable sheave 202 of 201 via a bearing 203, a slider 205 is connected to the bearing case 204, the slider 205 is slidably fitted and inserted into a handle bracket 206, and a handle is attached to the slider 205. It is known that a handle 208 is connected via a shaft 207.

(Problems to be solved by the invention) However, in the former structure, the scale casing 10 forming the opening / closing operation mechanism A ₁₁ on the pulley 106 via the bearings 105 and 108.
Since the shaft 3 and the shaft 104 are supported, the scale casing 103 is provided to prevent them from co-rotating with the pulley.
A fixed bar portion 110 is formed on the fixed bar portion 110, and a detent support 111 is engaged with the fixed bar portion 110. In the latter structure, for the same reason, the handle bracket 206 that constitutes the opening / closing operation mechanism A ₁₂ is used.
The arm portion 209 is further protruded, and the arm portion 209 is attached to another main body portion.
It is designed to be attached and fixed to 210.

Therefore, in the above-described conventional structure, the fixed bar portion 110
Since the opening / closing operation mechanism is provided with a protruding member such as the arm portion 209 or the arm portion 209, and the protruding member is fixed to a portion different from the transmission, there is a limitation in layout when mounting the pulley. However, due to the problem of its mounting restrictions, it became unusable, and new parts such as a rotation stop support 111 and the like had to be added separately in order to fix the fixing bar portion 110 and the like.

The present invention has been made in view of the above point, and the opening / closing operation mechanism is not attached to a part different from the transmission.
By fixing inside, the purpose is to greatly improve the degree of freedom in mounting when assembled.

(Means for Solving the Problems) The present invention includes an opening / closing operation side pulley including a movable sheave and a fixed sheave, an opening / closing follow-up side pulley including a movable sheave and a fixed sheave, and a belt wound between them. It is premised on a belt type continuously variable transmission in which an opening / closing operation mechanism is supported on the opening / closing operation side pulley via a bearing.

The invention according to claim (1) is characterized in that the opening / closing operation mechanism includes a first tubular member rotatably attached to a movable sheave of an opening / closing operation side pulley via a bearing, and the first tubular member. The second tubular member, which is screwed into and integrally provided with the handle member, and the first tubular member, which is loosely fitted in the first and second tubular members, are non-rotatable and slidable relative to each other. A third tubular member attached to the opening / closing follow-up side pulley, and a fourth tubular member rotatably attached to the pulley shaft of the open / close follow-up side pulley via a bearing; A bearing case rotatably and non-slidingly mounted on the movable sheave via a bearing, a connecting means for connecting the first tubular member and the bearing case, and the fourth case.
A fixed rod that connects the tubular member and the third tubular member is provided.

In the invention of claim (2), the connecting means further comprises first and second link members protruding from the first tubular member and the bearing case, and a connecting tool for connecting the first and second link members. And a rod member that is connected so that the connection distance can be adjusted.

(Operation) According to the invention of claim (1), when the handle member integrally attached to the second cylindrical member is rotated, the second member
The rotation of the first tubular member that is screwed into the tubular member is restricted because the first tubular member and the second tubular member rotate relative to each other because they are connected to the bearing case by the connecting means. The first tubular member and the bearing case move integrally in the respective axial directions. As a result, the diameters of both pulleys are made variable.

According to the invention of claim (2), the connecting distance between the first tubular member and the first and second link members protruding from the bearing case can be adjusted by the rod member via the connecting tool. Since they are connected, when the axial distance of the pulleys is changed, the connecting distance of the connecting means is also changed accordingly.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 4 showing a schematic configuration of a belt-type continuously variable transmission
In the figure, 1 is an opening / closing operation side pulley, 2 is an opening / closing follow-up side pulley, between which a speed change belt (not shown) is rotatably wound.

The opening / closing operation side pulley 1 has a fixed sheave 4 fixed to a pulley shaft 3 and a movable sheave 5 slidable on the pulley shaft 3 in the axial direction.

Each of the fixed sheave 4 and the movable sheave 5 is composed of sheave portions 4a and 5a having sheave surfaces 4c and 5c serving as pulley surfaces, and tubular portions 4b and 5b fitted onto the pulley shaft 3.
The tubular portion 4b of the movable sheave 5 is fitted and fixed to the pulley shaft 3, while the tubular portion 5b of the movable sheave 5 is engaged with a guide pin 6 fixed to the pulley shaft 3 and protruding outward in the radial direction. 5d, the guide pin 6 and the engaging groove 5d are engaged with each other so that the guide pin 6 slides only in the axial direction of the pulley shaft 3.

The tubular portion 5b of the movable sheave 5 is the tubular portion 4b of the fixed sheave 4.
Longer than that, and the bearing 7 near the sheave 5a
(For example, a ball bearing) is fitted to the outside, and the large-diameter first tubular member 8 is fitted and fixed to the outside. Therefore, the first tubular member 8 is attached to the movable sheave 5 via the bearing 7.
Is rotatably mounted. A screw portion 8a is formed inside the first tubular member 8.

Reference numeral 9 is a second tubular member having a diameter smaller than that of the first tubular member 8, and a screw portion 9a which is screwed with the screw portion 8a of the first tubular member 8 is formed on the outer side thereof. Then, the second tubular member 9 is
It is rotatably supported on the pulley shaft 3 via another bearing 10.

A handle member 11 is fitted and fixed to the outer end of the second tubular member 9 to be integrally attached thereto.
The third tubular member 12 is located radially outward of the first tubular member 8.
Are loosely fitted. An engagement groove 12a (for example, a cam groove) is formed in the third tubular member 12 in the axial direction, and the engagement groove 12a is formed.
A protruding portion that protrudes outward in the radial direction from the first tubular member 8.
8b (for example, a roller) is engaged, so that the first tubular member 8 is mounted so as not to be rotatable relative to the third tubular member 12 and slidably. Incidentally, 13 is a stop ring of the bearing 10.

Therefore, the opening / closing operation mechanism A including the first to third tubular members 8, 9, 12 and the handle member 11 is supported on the pulley shaft 3 and the movable sheave 5 of the pulley 1 via the bearings 7, 10. There is.

On the other hand, the open / close follow-up pulley 2 also has a fixed sheave 21 and a movable sheave 22, and the movable sheave 22 is fixed to a tubular portion 22b in which a sheave portion 22a is slidably fitted on a pulley shaft 23. The guide pin 24, which is erected radially outward from the pulley shaft 23, engages with the guide groove 22c of the tubular portion 22b, and the movable sheave 22
However, due to the engagement relationship between the guide groove 22c and the guide pin 24, the guide groove 22c moves only in the axial direction.

Further, the tubular portion 21a of the fixed sheave 21 is fitted and inserted into the outer side of the tubular portion 22b of the movable sheave 22, and the distal end portion of the guide pin 24 is inserted so as to be immovably fixed to the pulley shaft 23. Has been done.

A bearing case 26 is rotatably and non-slidably attached to the end of the tubular portion 22b of the movable sheave 22 via a bearing 25, and a protrusion protruding radially outward in the bearing case 26. 26a is formed. A fourth tubular member 28 is rotatably attached to the pulley shaft 23 (specifically, the tubular portion 21a of the fixed sheave 21) via a bearing 27 at a portion that does not interfere with the opening and closing of the pulley 2. In the fourth tubular member 28,
An engagement groove 28a that engages with the protrusion 26a is formed.
29 is a stop ring of the bearing 25.

A link case 31 protruding from the first tubular member 8 of the open / close operation side pulley 1 and a bearing case of the open / close follower side pulley 2.
A link member 32 projecting from 26 is connected by a rod member 35 via connecting tools 33, 34.

As a result, the first operation is performed by rotating the handle member 11.
When the pulley groove interval of the opening / closing operation side pulley 1 is adjusted by the screw relationship between the tubular member 8 and the second tubular member 9, for example, the second
As shown on the outer side of the drawing, when the small-pitch state in which the pulley groove spacing of the opening / closing operation side pulley 1 is large is adjusted to the large-diameter pitch state in which the pulley groove spacing is small as shown in the inner side of FIG. According to the adjustment of the pulley 1, the first tubular member 8 moves in the axial direction. Thereby, the link member 31, the connecting member 33, the rod member 35, and the connecting member forming the connecting means R are formed.
Since the bearing case 26 is moved via the 34 and the link member 32, the movable sheave 22 of the opening / closing follow-up side pulley 2 to which the bearing case 26 is attached also moves in the axial direction, so that the opening / closing follow-up side pulley 2 is moved. The groove spacing is adjusted.

Further, the first tubular member 8 of the open / close operation side pulley 1 and the fourth tubular member 28 of the open / close follower side pulley 2 are respectively fixed members 4
1, 42 are provided in a protruding manner, and the other end of a fixed rod 43 whose one end is fixed to the fixing member 41 of the opening / closing operation side pulley 1 is engaged with the fixing member 42 of the opening / closing follow-up side pulley 2.

According to the above configuration, when the pulleys 1 and 2 rotate, the opening / closing operation mechanism A is supported by the bearing 7, and therefore tries to rotate in the rotation direction due to friction loss. Since they are connected by the fixed rod 43, the movement is restricted and the floating range is limited.

Especially, in order to minimize the distance between the fixing members 41, 42,
If the length of the fixed rod 43 is set, the floating range becomes almost zero, and the opening / closing operation mechanism A stands still on the opening / closing operation side pulley 1.

Further, when changing the inter-axis distance, it can be freely set by adjusting the length of the fixed rod 43.

(Effect of the Invention) In the invention of claim (1), since the tubular member on the opening / closing follow-up pulley and the opening / closing operation mechanism on the opening / closing operation side pulley are connected by the connecting means, the opening / closing operation mechanism is It does not rotate as the pulley rotates. Therefore, it is not necessary to provide a special mechanism to prevent the accompanying rotation, and there is no special restriction on the device to be attached. For example, a place where the axial distance is extremely long, the layout is crowded, and other parts are It can be easily attached to places where the connection is complicated and the attachment position can be changed freely.

The invention of claim (2) can be applied regardless of the distance between the pulley axes, since the connecting distance of the connecting means can be changed.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a front view of a belt type continuously variable transmission, and FIG. 2 is an outside when a groove interval of an opening / closing operation side pulley becomes wide, FIG. 3 is a partial sectional side view of the opening / closing operation side pulley, FIG. 4 is a partial sectional side view of the opening / closing follow side pulley, and FIGS. 5 and 6 are It is a figure which shows a conventional example, respectively. 1 …… Open / close operation side pulley, 2 …… Open / close follow side pulley, 7,
27 ... Bearing, 28 ... Fourth cylindrical member, A ... Opening / closing operation mechanism, R ... Coupling means

Claims (2)

(57) [Scope of utility model registration request] 1. An opening / closing operation side pulley having an opening / closing operation side pulley composed of a movable sheave and a fixed sheave, an opening / closing follow-up side pulley composed of a movable sheave and a fixed sheave, and a belt wound between them. In a belt type continuously variable transmission in which an opening / closing operation mechanism is supported via a bearing, the opening / closing operation mechanism is rotatably attached to a movable sheave of an opening / closing operation side pulley via a bearing. A tubular member, a second tubular member which is screwed to the first tubular member and integrally provided with a handle member, and the first and second
A third tubular member that is loosely fitted in the tubular member and is slidably attached to the first tubular member so as not to rotate relative to the first tubular member; A fourth cylindrical member rotatably attached via a bearing; a bearing case rotatably and non-slidingly attached via a bearing to the movable sheave of the opening / closing follow-up side pulley; A belt-type continuously variable transmission, comprising: a connecting means that connects the tubular member and the bearing case; and a fixed rod that connects the fourth tubular member and the third tubular member. 2. The connecting means comprises first and second link members protruding from the first tubular member and the bearing case, and the first and second link members.
The belt type continuously variable transmission according to claim 1, further comprising: a rod member that connects the second link member via a connector so that a connection distance can be adjusted.