JPH0210854Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention comprises a fixed-position rotary body, a movable rotary body that is displaced in the radial direction of the fixed-position rotary body by manual operation of an operating tool, and The present invention relates to a transmission device equipped with a continuously variable transmission comprising a pressing member that presses a peripheral portion of the movable rotary body to an end face of the fixed position rotary body.

[Conventional technology]

Conventionally, in the continuously variable transmission described above, in order to bring the speed to a neutral state for the purpose of cutting off power transmission, the peripheral part of the movable rotor is pressed against the center of rotation of the end face of the fixed-position rotor by a pressing member. was located.

[The problem that the invention attempts to solve]

However, it is difficult to accurately position the circumference of the movable rotor at the center of rotation of the end face of the fixed-position rotor, and as a result, power is transmitted unexpectedly.
There is a danger that the vehicle may start to run, or
In cases where the fixing bolt is exposed at the center of rotation in order to attach the fixed-position rotating body to the rotating shaft, there is a risk of damage if the movable rotating body is positioned at the center of rotation.

An object of the present invention is to reliably achieve a neutral speed change state without damaging the movable rotating body.

[Means for solving problems]

A characteristic configuration of the transmission device of the present invention is that a notch is provided in the pressing sliding contact portion of the pressing member to the support member of the movable rotating body to release the pressing action when the movable rotating body is located at the neutral position. The functions and effects are as follows.

[Effect]

In other words, when the movable rotating body comes to the neutral position, the pressing action is released by the notch provided in the pressing sliding contact part of the pressing member, so that the circumference of the movable rotating body does not come into pressure contact with the end face of the
Even if a mounting bolt or the like is exposed at the center of rotation of the fixed-position rotary body, damage to the movable rotary body can be avoided.

[Effect of idea]

Therefore, by simply modifying the structure, it is possible to provide a device that is extremely safe and less likely to malfunction.

〔Example〕

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

As shown in Fig. 2, 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 device 5 is disposed within the width of the engine E and between the engine E and the transmission case 1, and is constructed as shown in FIGS. 3 to 5. In other words, the output shaft 8 of the engine E is provided within the width 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 11 having an axis parallel to the rotating end surface 9A of the drive disk 9 is rotatably attached to the case 21 so as to be moved in parallel from one outer circumferential side in the radial direction to the other outer circumferential side beyond the rotation center O. support, and
A first sprocket 19 of a chain transmission device 18 internally supported by a chain case 17 is slidably fitted onto this spline shaft 11, and a passive disk 10 is integrally connected to a second sprocket 20, which is formed in the case 21. A rod 13 integrally protrudes from the chain case 17 outward from the elongated hole 22.
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.

In addition, in order to transmit or not 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 26 is moved closer to the drive disk 9. In conjunction with this, the passive disk 10 on the free end side of the chain case 17 also has its peripheral portion 10A aligned with the drive disk 9.
The rotating end surface 9A is pressed against the rotating end surface 9A by the urging force of the pressing spring 27, and torque transmission becomes possible.
That is, as shown in FIG. 1, the pressing force by the pressing member 26 is transmitted to the rod 23 via the pressing sliding contact portion 26B formed on one side of the inside of the elongated hole 24, When the passive disk 10 is in the neutral position, the rod 23
A recess 26C is formed in which the pressing member 26 releases the pressing action.

Conversely, if the wire 28 is pushed back, the return spring 29 connected to one end of the pressing member 26
The swinging free end surface 26A of the pressing member 26 is pulled and urged in a direction away from the drive disk 9, and the mutual pressure between the disks 9 and 10 is loosened, and the passive disk 10 is separated from the drive disk 9. Therefore, the torque of the drive disk 9 is not transmitted to the passive disk 10 regardless of the shift position.

As a result, the entire continuously variable transmission 5 is provided with an operating mechanism 32 that provides a main clutch function.

The driving disk 9 is made of aluminum, and the peripheral portion 10A of the passive disk 10 is baked with rubber to improve torque transmission.

[Another example]

In place of the driving 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.

The fixed position rotating body 9 and the movable rotating body 10 are
Either one may be the driving side or the passive side.

A gear transmission may be used instead of the chain transmission 18, so that the chain case 17
is simply called the support member 17.

Instead of the recess 26C of the pressing sliding contact portion 26B, it may be a wall for pressing or a portion without sides,
These are collectively called notches.

[Brief explanation of drawings]

The drawings show an embodiment of the transmission device according to the present invention,
Figure 1 is an enlarged view of the main parts, Figure 2 is an overall side view of the walking management machine, Figure 3 is a plan view showing a partial cross section of the main parts, and Figure 4 is a side view showing a partial cross section of the main parts. Figure, 5th
The figure is a front view showing a partial cross section of the main part. 5...Continuously variable transmission, 7...Operation tool, 9...Fixed position rotating body, 9A...End face, 10...Movable rotating body, 10A...Surrounding part, 17...Support member, 26
...Press member, 26B...Press sliding contact part, 26C...
...Notch.

Claims (1)

[Scope of utility model registration request] The fixed position rotary body 9, the movable rotary body 10 which is displaced in the radial direction of the fixed position rotary body 9 by manual operation of the operating tool 7, and the peripheral portion 10A of the movable rotary body 10 are raised forward. The transmission device is equipped with a continuously variable transmission device 5 consisting of a pressing member 26 that is brought into pressure contact with an end surface 9A of a fixed position rotary body 9, and the pressing member 26 is pressed and slid into contact with a support member 17 of the movable rotary body 10. In the portion 26B, the movable rotating body 1
The transmission device is provided with a notch 26c for releasing the pressing action when 0 is in the neutral position.