JP3314613B2 - Toroidal type continuously variable transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toroidal type continuously variable transmission, and more particularly to a support structure for a lower link.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 4-321855 is referred to as a prior art document relating to a support structure of a lower link.

[0003]

In the conventional toroidal type continuously variable transmission disclosed in the above publication,
The link connected to the roller support member is swingably held by a base with a spherical seat (spherical bearing) (link post for the upper link, casing of the transmission or piston body for the lower link). Thus, such a link was usually fixed from the inside of the transmission.

Here, as described above, it is more preferable to support the roller support member with the pivot pin than in the case of using the spherical seat disposed on the base portion when the roller support member is moved up and down. (I.e., if supported by a pivot pin, the center of swing of the link can be kept constant), and its use has been desired. With a fixed structure, it is particularly difficult to assemble the lower link to the base, and although proposals regarding the upper link (JP-A-61-124764) can be seen, effective proposals have been made for the lower link so far. There was no current situation.

An object of the present invention is to propose a toroidal-type continuously variable transmission having a structure in which even when the lower link and the base are swingably supported by pins, there is no difficulty in assembling the lower link and the base.

[0006]

According to a first aspect of the present invention, there is provided a toroidal-type continuously variable transmission, comprising: an input disk and an output disk which are opposed to each other on a main shaft; A power roller that transfers power by frictional engagement between the disks, and a power roller that rotatably holds the power roller via an eccentric shaft and is rotatable in a direction orthogonal to the axis of the input / output disk and has a rotating shaft. A roller support member that can move up and down along the upper and lower links via spherical bearings at both ends of the roller support member, and align these links with the up and down movement along the axis of the roller support member. For a toroidal-type continuously variable transmission having a base that is swingably held, a lower link and a base supporting the lower link are connected to an input / output disk. In addition to pivotally connecting via a pivot pin extending along the axis of rotation, a bolt hole with a thread groove formed in the base is formed, and the base is moved up and down by a casing or a roller support member of a transmission. The casing of the transmission or the roller supporting member is fixedly held on the body of the piston which moves up and down by a bolt which is screwed into a thread groove provided in the base via the body of the piston to be moved.

[0007] A toroidal-type continuously variable transmission according to a second aspect of the present invention is a power transmission system that transfers power by frictional engagement between an input disk and an output disk which are arranged on a main shaft and opposed to each other. A roller support member that rotatably holds the power roller via an eccentric shaft and is rotatable in a direction orthogonal to the axis of the input / output disk, and that can move up and down along the rotation axis. At both ends of the roller supporting member, a toroidal type having a base portion which is connected to an upper link and a lower link via spherical bearings and supports these links so as to be able to swing in accordance with the vertical movement along the axis of the roller supporting member. In a step transmission, a lower link and a base supporting the lower link can be pivoted via a pivot pin extending along the rotation axis of an input / output disk. And a stud bolt embedded in the base is screwed into a nut via a body of a piston that moves the casing or roller support member of the transmission up and down, thereby connecting the base to the casing or roller support member of the transmission. It is characterized by being fixedly held on the body of a piston to be moved up and down.

[0008]

In the toroidal type continuously variable transmission according to the first aspect, the lower link and the base supporting the lower link are swingably connected via a pivot pin, and the base is connected to the casing of the transmission. Alternatively, since the roller supporting member is fixedly held by a bolt to the body of the piston that moves up and down, fastening from outside the transmission (below the piston body) becomes possible.

In the toroidal-type continuously variable transmission according to the second aspect, the stud bolt is implanted in the base side so that when the base is mounted on the body or the casing of the piston, the stud bolt is simply inserted into the through hole through which the bolt passes. Can be positioned on the base body or casing (the bolt also has a function as a guide), and the lower link can be installed simply by attaching a nut to the tip of the bolt protruding to the opposite side of the piston body or casing and screwing it. Can be swingably supported on the base.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings.

FIG. 1 shows the overall configuration of a toroidal-type continuously variable transmission according to the present invention in a longitudinal section. In FIG. 1, reference numeral 1 denotes a main shaft, and reference numerals 2 and 3 denote input shafts disposed on the main shaft 1 so as to face each other. Output disks (only one of the input / output disks is shown in the drawing), 4, 5 are power rollers for transferring power by frictional engagement between the input / output disks 2.3, and 6, 7 are roller support members. The roller support members 6, 7 rotatably hold the power rollers 4, 5 via eccentric shafts 8, 9, respectively, and are orthogonal to the axis O of the input / output shaft (same as the axis of the main shaft). rotatable in the direction of, and have become vertically movable along its axis of rotation O ₁ at the piston of the piston body 10.

Reference numeral 11 denotes an upper link for pivotally connecting one of the shaft ends of the roller support members 6, 7 via a spherical bearing 12, and reference numeral 13 also oscillates the upper link 11 via a spherical bearing 14. A link post 15 to be held as possible, a lower link 15 swingably connected to the other shaft end of the roller supporting members 6 and 7 via a spherical bearing 16 and a piston body 17
The base 17 is disposed between the protrusions 10 and is fixed and held by a nut n from below the piston body 10 with a stud bolt b. The base 17 and the lower link 15
Is pivotally connected via a pivot pin 18 extending along the axis O of the input / output disks 2, 3.

FIG. 2 specifically shows a situation when the lower link 15 applied to the double-cavity toroidal type continuously variable transmission is assembled to the piston body 10 together with the base 17. A base 17 in which the stud bolt b is implanted and the lower link 15 are connected via a pivot pin 18, and the base 17 is positioned between the protrusions of the piston body 10 and is positioned, and the stud which has exited the through hole of the piston body 10. By tightening the tip of the bolt b with the nut n from the lower side of the body 10, such a member can be securely assembled in the casing of the transmission.

Although FIGS. 1 and 2 show the case where the stud bolt b is implanted in the base 17, in the present invention, positioning can be performed only by disposing the base 17 between the protrusions of the piston body 10. since, previously bolt holes b ₂ a may be provided, after placing the base 17 between the protruding portion of the piston body 10, to be fixed by screwing the bolt b ₁ from the lower side to the base 17 as shown in FIG. 3 Is also possible,
The present invention is not limited to the case where the stud bolt is implanted in the base portion 17.

[Brief description of the drawings]

FIG. 1 is a view showing a longitudinal section of a toroidal type continuously variable transmission according to the present invention.

FIG. 2 is a diagram showing only a lower link, a link post, and a piston body of the toroidal-type continuously variable transmission according to the present invention.

FIG. 3 is a diagram showing only a lower link, a link post, and a piston body of the toroidal-type continuously variable transmission according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main shaft 2 Input disk 3 Output disk 4 Power roller 5 Power roller 6 Roller support member 7 Roller support member 8 Eccentric shaft 9 Eccentric shaft 10 Piston body 11 Upper link 12 Spherical bearing 13 Link post 14 Spherical bearing 15 Lower link 16 Spherical bearing 17 Base 18 pivot pin O axis O ₁ rotation axis b stud bolt b ₁ bolt b ₂ bolt n nut

Claims (2)

(57) [Claims] An input disk and an output disk disposed on a main shaft facing each other, a power roller for transferring power by frictional engagement between the input and output disks, and a power roller rotatably held via an eccentric shaft. A roller support member rotatable in a direction perpendicular to the axis of the input / output disk and capable of moving up and down along the rotation axis of the roller support member. In a toroidal-type continuously variable transmission having bases that are connected to links and swingably supported in accordance with the vertical movement of the roller supporting member along the axis, a lower link and a base supporting the lower link are inserted. A pivotal pin extending along the rotation axis of the output disk is swingably connected to the output disk, and a bolt hole with a thread groove formed in the base is formed. Moving the casing or roller support member of the transmission up or down by a bolt screwed into a thread groove provided in the base portion via a body of a piston for moving the casing or roller support member of the transmission up and down. A toroidal-type continuously variable transmission characterized by being fixedly held on a piston body to be driven. 2. An input disk and an output disk which are opposed to each other on a main shaft, a power roller for transferring power by frictional engagement between the input and output disks, and a power roller rotatably held via an eccentric shaft. And a roller support member rotatable in a direction perpendicular to the axis of the input / output disk and capable of moving up and down along the rotation axis. At both ends of the roller support member, an upper link and a lower member are provided via spherical bearings. In a toroidal-type continuously variable transmission having bases that are connected to respective links and swingably supported in accordance with vertical movement along the axis of the roller support member, the lower link and the base supporting the lower link are inserted. A stud bolt implanted in the base is pivotally connected via a pivot pin extending along the rotation axis of the output disk, and a transmission cable That the base is fixedly held to the casing of the transmission or the body of the piston for moving the roller supporting member up and down by screwing the base or the roller supporting member to the nut via the body of the piston for moving the roller supporting member up and down. Features a toroidal type continuously variable transmission.