JPH0210855Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The invention consists of a fixed-position rotary body and a movable rotary body that can be freely displaced in the radial direction of the fixed-position rotary body using an operating tool. The present invention relates to a continuously variable transmission in which the movable rotary body includes a rotary body and a transmission ring that is externally fitted and bonded to the rotary body and that slides in contact with an end surface of the fixed position rotary body.

[Prior Art] Conventionally, as shown in FIG. 6, the transmission ring 02 of the movable rotary body is molded of a material suitable for frictional transmission, which is different from the rotary body 01 made of a strength member. The sliding contact part 02A for the fixed position rotating body is on the outer periphery, and the adhesive surface 02 for the rotating body 01
It was formed from an almost chevron-shaped ring with only B formed on the inner circumference.

[Problem that the invention attempts to solve]

However, the sliding contact portion 02A of the transmission ring 02 is
Heat is generated due to frictional transmission from the fixed position rotating body,
As the temperature of the entire transmission ring 02 increases, there is a risk of plastic deformation or deterioration. The drawback was that there were restrictions.

An object of the present invention is to suppress the temperature rise of the transmission ring.

[Means for solving problems]

The characteristic configuration of the continuously variable transmission device of the present invention is that the transmission ring has a ring portion in which the sliding portion for the fixed-position rotating body is formed on the outer periphery and the adhesive surface for the rotating body is formed on the inner periphery; fins extending between the ring part and the flat adhesive part are spaced at appropriate intervals in the circumferential direction of the transmission ring. The functions and effects are as follows.

[Effect]

In other words, the transmission ring has a ring part in which the sliding part for the fixed-position rotating body is formed on the outer periphery and the adhesive surface for the rotating body is formed on the inner periphery, and the inner side of the ring part is located closer to the axis of rotation than the lateral side. Since it has a shape that integrally includes a flat adhesive part that projects outward in the direction, its surface area becomes large, and heat dissipation efficiency is improved without changing the adhesive strength to the rotating body. Furthermore, since the fins spanning the ring part and the flat adhesive part are integrally arranged at appropriate intervals in the circumferential direction of the transmission ring, not only the heat dissipation area is further increased, but also the fins create a turbulent flow in the surrounding area. This makes it possible to improve the heat exchange efficiency with the air and efficiently suppress the temperature rise of the transmission ring as a whole.

[Effect of idea]

Therefore, without having to mold the transmission ring from expensive heat-resistant materials, durability can be improved by simply modifying the ring made of conventional materials, making it possible to create an economically advantageous transmission ring with no restrictions on the materials used. We can provide rings.

In addition, since the air generated by the fins is also blown to the fixed-position rotating body, the fixed-position rotating body can also be cooled, and the frictional heat between the two rotating bodies can be further suppressed. If it is made of strong material, the ribs can be expected to have a reinforcing effect on the ring part, and can also be expected to serve as an indicator of wear on the ring part, so it can be expected to have many good functions. As a whole, high transmission performance and durability can be obtained.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 3, a frame 2 is extended forward from the transmission case 1, an engine E is mounted on this frame 2, and a pair of left and right propulsion wheels 3 are supported at the bottom of the transmission case 1. , a control handle 4 extending rearward and upward is attached to the upper part, and a continuously variable transmission is operated by a lever-type operating tool 7 attached to the handle 4 between the engine E and the transmission case 1. 5 is provided to transmit the driving force of the engine E to a transmission device (not shown) in the transmission case in a continuously variable manner.
A walking management machine is constructed that connects various working machines and travels.

The continuously variable transmission transmission 5 has a width between the engine E and
It is disposed between the engine E and the transmission case 1, and is constructed as shown in FIGS. 1 to 5. In other words, the output shaft 8 of the engine E is provided between the widths of the engine E and protrudes toward the transmission case 1 side, which is arranged within the width of the engine E.
A disk-shaped drive disk 9 is fixed so that its end face faces toward the rear of the aircraft, and a disk-shaped passive disk 10 having an axis perpendicular to the axis of the drive disk 9 is attached to the drive disk 9. A spline shaft 1 having an axis parallel to the rotating end surface 9A of the drive disk 9 so as to move parallelly from one outer circumferential side in the radial direction to the other outer circumferential side beyond the rotation center O.
1 is rotatably supported in a case 21, and a first sprocket 19 of a chain transmission 18 internally supported in a chain case 17 is slidably fitted onto the spline shaft 11, and a second sprocket A rod 13 integrally connects the passive disk 10 to the chain case 20 and protrudes outward from the chain case 17 through a long hole 22 formed in the case 21.
is pushed and pulled by the swinging operation of the lever-type operating tool 7 via the wire 14, and the chain case 17, which is biased in one direction by the spring 12 fitted onto the spline shaft 11, is attached to the spline shaft 11. Slide along.

Further, in order to transmit or non-transmit torque from the end surface 9A of the drive disk 9 to the passive disk 10, a pressing member is provided that is swingable in the far and near directions around the fulcrum shaft 25 with respect to the drive disk 9. 26
A rod 23 integrally protruding from the free end of the chain case 17 is inserted into the elongated hole 24 formed in the swinging free end surface 26A of the pressing member 26.
1, and is connected to one end of the pressing member 26 via a pressing spring 27. By pulling the wire 28, the pressing member 2
6 to approach the drive disk 9, and in conjunction with this, the passive disk 10 on the free end side of the chain case 17 also has its outer periphery against the rotating end surface 9A of the drive disk 9 under the urging force of the pressing spring 27. As a result, they are pressed together and torque transmission becomes possible. and,
Conversely, if the wire 28 is pushed back, the return spring 29 connected to one end of the pressing member 26 causes the pressing member 2
The swinging free end surface 26A of the drive disk 6 is pulled and biased in a direction away from the drive disk 9, and the passive disk 10 is separated from the drive disk 9, so that the torque of the drive disk 9 is not transmitted to the passive disk 10.

As a result, the entire continuously variable transmission 5 is provided with a main clutch function.

The driving disk 9 is molded from aluminum, and the passive disk 10 is externally bonded to the rotating body 10B made of metal by baking, and is in sliding contact with the end surface 9A of the driving disk 9. Consists of a rubber transmission ring 10A,
Good torque transmission.

The transmission ring 10A has a sliding portion A in contact with the drive disk 9 on the outer periphery and a rotary body 1 on the outer periphery.
A ring portion 10a with a chevron-shaped cross section and an adhesive surface B for 0B formed on the inner periphery; and the ring portion 10a.
It is integrally formed with flat adhesive parts 10b, 10b which protrude outward in the direction of the rotational axis P from both lateral sides thereof on the inside of the rotating body 10B, and the adhesive surface B of the ring part 10a and the flat The adhesive portion 10b is bonded by baking. Further, a plurality of thick fins 10c are integrally provided over the ring portion 10a and the flat bonded portion 10b at appropriate intervals in the circumferential direction of the transmission ring 10A, and are also used as ribs for reinforcing the ring portion 10a. There is.

[Another example]

In place of the drive disk 9 and the passive disk 10,
A thick rod-shaped rotating body or a rotating body with an end surface other than a plane may be used, and these are collectively referred to as a fixed-position rotating body and a movable rotating body, respectively.

Either of the fixed position rotating body and the movable rotating body may be on the driving side or the passive side.

The fins 10c may be thin and have a large air turbulence effect.

Further, the transmission ring 10A may be made of any material other than rubber, such as an elastic resin, as long as it is suitable for frictional transmission.

The flat bonded portion 10b is not limited to both lateral sides of the ring portion 10a, but may be provided only on one side. Therefore, in this case, the fin 10c is also flat bonded on one of the lateral sides of the ring portion 10a. It is integrally provided over the portion 10b.

[Brief explanation of the drawing]

The drawings show an embodiment of the continuously variable transmission device according to the present invention, and FIG. 1 is a plan view showing a partial cross section of the main part, and FIG.
The figure is a side view of the movable rotary body, Figure 3 is an overall side view of the walking management machine, Figure 4 is a plan view showing a partial cross section of the continuously variable transmission, and Figure 5 is a side view of the continuously variable transmission. FIG. 6 is a side view showing a partial cross section, and FIG. 6 is a sectional view of a conventional movable rotating body. 7... Operating tool, 9... Fixed position rotating body, 9A...
...End face, 10...Movable rotating body, 10A...Transmission ring, 10B...Rotating body, 10a...Ring part, 10b...Flat adhesive part, 10c...Fin, A...Sliding contact part, B ...adhesive surface, P...rotation axis core.

Claims (1)

[Scope of utility model registration request] It consists of a fixed position rotary body 9 and a movable rotary body 10 that can be freely displaced in the radial direction of the fixed position rotary body 9 by an operating tool 7, and the movable rotary body 1
0 is externally attached to the rotating body 10B, and is attached to the end face 9 of the fixed position rotating body 9.
A continuously variable transmission comprising a transmission ring 10A in sliding contact with the transmission ring 10A, the transmission ring 10A comprising:
The sliding contact part A with respect to the fixed position rotary body 9 is on the outer periphery, and the adhesive surface B with respect to the rotary body 10B.
It integrally has a ring part 10a formed on the inner periphery, and a flat adhesive part 10b that extends outward in the rotation axis P direction from the lateral side inside the ring part 10a, and the ring part 10a and A continuously variable transmission device in which fins 10c extending over the flat adhesive portion 10b are integrally arranged at appropriate intervals in the circumferential direction of the transmission ring 10A.