JPS5828038A - Stepless speed changer - Google Patents

Abstract

PURPOSE:To perform a cushion start, by providing protrusive parts in a suitable interval in the internal peripheral of a V-belt, mounting this V-belt to a boss part of an idle pulley and detachably arranging the V-belt to a driving pulley. CONSTITUTION:A control handle 6 is turned to move an idle pulley 3 to the side of a driving pulley 2, if one side of a speed change belt 5 is contacted to a friction surface of the driving pulley 2, the speed change V-belt is rotated by the driving pulley 2. Here protrusive parts 15, provided in a certain interval to the internal periphery of the speed change belt 5, are adapted to a boss part 4 of the idle pulley 3, and the speed change V-belt 5 is vertically changed its movement by the height l of the protrusive part 15. Accordingly, the V-belt 5 is radially externally lifted and separated from a friction surface of the driving pulley 2, however, the idle pulley 3 is rotated by inertia force and the like, simultaneously the V-belt 5 is contacted rotating together with the boss part 4 of the idle pulley 3 and changed with a position of the internal periphery, if parts 16 except the protrusive part 15 are contacted, the V-belt 5 is again lowered and applied with a turning effect.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a belt-type continuously variable transmission, and its overall purpose is to easily and reliably perform the so-called cushion start at the initial stage of rotation, which is considered difficult with conventional transmissions. It is said that

DESCRIPTION OF THE PREFERRED EMBODIMENTS A fully illustrated embodiment of a continuously variable transmission according to the present invention will be described below.

In Figure ini k: (1) is a rotating shaft, to which a conical blade wheel (2) is fixed to all keys (1a), and a conical blade wheel (2) is attached opposite to the blade wheel (2). The variable speed V-pulley (A) is loosely fitted to allow full rotation and free sliding in the axial direction.
The pitch diameter of the variable speed V-belt (5) is completely changed by moving the screw rod (7), which is rotated by the full operation handle (6), to move forward and backward to approach and separate from the blade wheel (2). (5) 'eHang on this to perform the gear shifting operation, and the shifter (3) is fully equipped with a boss part (4), and the inner periphery is equipped with a protruding part) at an appropriate period. Blade wheel (2) and speed change V
The belt (5) can be moved toward and away from the belt. The transmission mechanism with the above configuration is provided on either the drive side or the driven side, and the transmission V belt (5) is stretched between the other transmission pulley (B+) having a narrow pressure, and Shift ■
Boo IJ (for forced contact/separation action of Al)! ! jj'The other speed change pulley (Bl follows this and always changes speed V
The pitch diameter is completely changed under the condition that the tension of the bell 1-(5) is kept constant in order to obtain the desired speed change rotation (11). Note that (8) and (9) in the figure are bearings, and the tip of the screw rod (7) is entirely related to the bearing case αq. (Ill 111p, speed change ■) At the fixed conical plate of the pulley (B), attach the key (12
a) Fixedly installed through f. -1, ta, (13+ is a movable conical plate provided opposite to the fixed conical plate (movable conical plate provided opposite to the moon, h rotation axis 02), fixed in the rotational direction and freely sliding in the axial direction. The fixing conical plate (]]) is always pressed against the fixed conical plate (]]) by the suppression spring 04.

Based on the above configuration, when the rotating shaft (11J) is used as the drive side, the full operation will be explained below.
When the variable speed V-belt (5) is separated from 2) and hooked onto the boss portion (4) of the free arm (3), the blade wheel (2) and the variable speed V-belt (5) are connected to each other as shown in Fig. 1. To leave, the blade wheel (2)
The connection relationship between the and Yuraku (3) is lost, and only the N rotating shaft (1) and the rickshaw (2) have bearings (8), ('1) k
Driving through. Therefore, the swing arm (3), the variable speed V-belt (5), and the rotating shaft (12j) on the driven side do not rotate.Next, the operating handle (6) w Ln moves to move the swing arm (3) to the blade wheel (2) side. 1tlJL speed change V belt (5) When brought into contact with the friction surface of the O-side full-blade wheel (2), the speed change V belt (
5) is rotated many times by the blade wheel (2). At this time, the gear shift V
A protrusion (15) provided on the inner circumference of the belt (5) with a constant periodic sound hits the boss part (4) of the protrusion (3), and the height of the protrusion 051 is n). 'i fluctuates up and down.

Therefore, when the speed change V-belt (5) is lifted in the outer diameter direction, that is, upward, the speed change V-belt (5) moves toward the blade wheel (2).
Although it separates from the friction surface of the protrusion (3), it twists around and rotates many times through its own inertia and bearings (8), (!), and at the same time it touches the boss part (4) of the protrusion (3). When the inner periphery of the variable speed V-belt (5) that contacts and rotates changes and comes into contact with the portion 06) without the protrusion (15), the variable speed V-belt (5) descends again and rotates around the blade wheel (2). It comes into contact with a friction surface and a rotational force is applied. In this way, the variable speed V belt (5)
The number of rotations is determined by the repetition of the approaching and separating movements of the blade wheel (2) and its degree. In addition, in Figure 2, the 7v belt (
The height C1) of the protrusion 05) on the inner periphery of 5) is drawn thickly to make it easier to understand, but in practical use, it is sufficient to have a step like this.

The above is the rotational movement with all the cushioning effect at the start, but after that, the operating handle (6) is further rotated to move the freewheel (3) toward the full-blade wheel (2) and adjust the rotation speed to the desired speed. The boss portion (4) of (3) and the variable speed V-belt (5) are completely separated and function as a normal belt type continuously variable transmission, allowing arbitrary and accurate speed conversion (see Fig. 3).

As explained above, this invention enables the cushion start of this belt-type continuously variable transmission, which has been considered a bottleneck in the past, to be easily and reliably performed. It is not a cushion start where the torque is balanced, but a semi-forced cushion start that is fully effective when starting a heavy load. Since it is completely slippery, it can be operated at low speed for long periods of time.It can also be used for adjusting low speed rotation of various industrial machines. moreover,
Since it is equipped with a clutch mechanism, it is convenient in terms of the system, and since the structure requires only 5 loads, it has advantages such as being able to be assembled at a low cost.

Additional relations The fact that the engagement and disengagement between the blade wheel and the freewheel at the initial stage of rotation is performed via the variable speed V-belt is essential to the structure of the invention related to the original patent application (Showa Tata Patent Application No. 2ψ572).
However, this invention is an invention that makes this point the main part of its configuration, and the so-called cushion start at the initial stage of rotation in a continuously variable transmission can be easily performed. This invention achieves all the same objectives as the invention related to the original patent application in that it can be carried out reliably, and it satisfies the requirements for an additional patent as stipulated in Article 37, Item 1 of the Patent Law. be.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing one embodiment of the present invention during idle running, FIG. 2 is a longitudinal sectional side view of the same, and FIG. 3 is a longitudinal sectional front view of the same during normal operation as a continuously variable transmission. (1)...rotating shaft, (2)...blade wheel, (3)...
Yugun, (A)...Shift ■Boo IJ, (41...
Boss portion, (5)...speed change V belt, α5)...inner peripheral protrusion of the speed change V belt. Patent applicant Sake Riki Seisakusho Co., Ltd.

Claims (1)

[Claims] A conical power wheel (2) fixed to the rotating shaft (1) and a conical pulley (3) loosely fitted to allow full rotation and axial movement.
The gear shifter (3) is moved forward and backward by rotating the entire handle to move it toward and away from the rickshaw (2) to perform the gear shifting operation, and the boss part is attached to the shifter (3). (4) and protrusions (15
)', and the boss part (4) is provided with the corresponding gear shift bell) (5)'
The continuously variable transmission is characterized in that the rickshaw (2) and variable speed V-belt (5) can be connected to and separated from each other by hooking them.