JPS632687Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of assembling the drive motor and reducer together with a cover etc., attaching continuously variable speed pulleys to the shaft of the drive motor and the shaft of the reducer, and suspending a belt between both pulleys. The present invention relates to a belt-type continuously variable transmission device in which a continuously variable transmission pulley attached to a drive motor is operated using a right-angled handle.

In this type of belt-type continuously variable transmission, conventionally, as shown in FIGS. 1 and 2, a drive motor 1
is fixed to a base cover 2, and a fixed conical wheel 5 of a continuously variable speed pulley 4 is attached to an output shaft 3 of the drive motor 1. A boss portion 6a of a movable conical wheel 6 is attached to the outer periphery of the shaft portion 5a of the fixed conical wheel 5 so as to be slidable in the axial direction. A bearing case 8 is fitted onto the outer periphery of the boss portion 6a of the movable conical wheel 6 via a bearing 7, and the case 8 is provided with a rotation stopper. A feed screw 9 screwed into the inner periphery of the end of the bearing case 8 is rotatably connected to the end of the shaft 5a of the fixed conical wheel 5 via a bearing 10. A bevel gear 11 is fixed to the side surface of the feed screw 9, and a gear 12 that meshes with the bevel gear 11 is attached to a handle shaft 13. The handle shaft 13 is rotatably supported in a shaft hole of a handle case 14. The handle case 14
is fixed to the cover 15. The cover 15 is fixed to the base cover 2.

In the above configuration, when the handle shaft 13 is rotated, the bevel gear 11 that meshes with the gear 12 rotates,
The feed screw 9 also turns at the same time. The bearing case 8 screwed into the feed screw 9 moves in the axial direction, and the movable conical wheel 6 similarly moves in the axial direction via the bearing 7, so that the conical portion 5b of the fixed conical wheel 5 and the movable conical wheel 6 The width of the V groove formed by the conical part 6b is changed. By rotating the handle shaft 13, rotational force is transmitted to the bevel gear 11 that meshes with the gear 12 fixed to the handle shaft 13.
If the direction of the shaft hole of the handle case 14 attached to the handle case 5 and the shaft direction of the feed screw 9 are at right angles,
The meshing between the gear 12 and the bevel gear 11 is smooth, but if the gear 12 and the bevel gear 11 are even slightly misaligned, the meshing of the teeth will be poor, and if the handle shaft 13 is rotated forcibly, a radial force will act on the bevel gear 11, causing the motor to There is an overhang on the shaft.

Moreover, conversely, concentrated stress acts on the attachment portion of the cover 15, and there is a risk that the attachment portion may be damaged.

The present invention aims to eliminate the above-mentioned defects by preventing the feed screw 9 and the bevel gear 11 from sticking together.

The configuration of the present invention will be explained in detail below based on the embodiment shown in FIG.

A fixed conical wheel 21 of a continuously variable speed pulley 20 is fixed to the output shaft of a drive motor (not shown). A movable conical wheel 22 having a boss portion 22a having an inner circumferential portion that fits into the outer circumferential portion of the shaft portion 21a fixed to the fixed conical wheel 21 is moved in the axial direction by a key structure. It is designed to be able to slide freely. A bearing case 24 is fitted onto the outer periphery of the boss portion 22a of the movable conical wheel 22 via a bearing 23. The case 24 is provided with a rotation stopper mechanism, and the shaft portion 21
It is configured to be movable only in the direction along a. A feed screw 25 screwed into the inner periphery of the end of the bearing case 24 is rotatably coupled to the outer periphery of the end of the shaft portion 21a of the fixed conical wheel 21 via a bearing 26. There are 2 on the side of the feed screw 25.
Two screw holes 27 are cut and pins 28 are screwed into them. Pin 28 formed on driven bevel gear 30
Insert pin 28 into hole 29 or elongated hole larger than the diameter of
is loosely fitted. A boss portion 31 of the bevel gear 30 is rotatably supported by a flange cover 32. The flange cover 32 is fixed to the handle case 35.

A drive bevel gear 33 that meshes with the bevel gear 30 is fixed to a handle shaft 34, and the handle shaft 34 is rotatably supported by a handle case 35.

The handle case 35 is attached to a cover 36 that covers the continuously variable speed pulley 20. In addition, pin 28
is provided in the bevel gear 30, and the hole 29 is connected to the feed screw 25.
It may also be provided.

In the belt type continuously variable transmission of the present invention having the above configuration, when the handle shaft 34 is rotated manually or automatically, the bevel gear 33 also rotates. The bevel gear 30 that meshes with the bevel gear 33 also rotates while being decelerated by the number of teeth. Bevel gear 30 is pin 2
8, the rotation is transmitted through the hole 29 of the bevel gear 30 to rotate the feed screw 25. The bearing case 24 screwed into the feed screw 25 moves in the axial direction. As a result, the movable conical wheel 22 is slid on the outer circumference of the shaft portion 21a of the fixed conical wheel 21 via the bearing 23, and the width of the V groove formed by the conical portions of both the conical wheels 21 and 22 is steplessly changed. Let's change it. The bevel gear 30 and the feed screw 25 are connected by a pin 28, but since the bevel gear 30 has an elongated hole or a large hole 29, even if the center of the bevel gear 30 is slightly out of alignment, the elongated hole or the large hole 29 absorbs it. Therefore, no excessive force is applied to the transmission 20, the output shaft of the motor, the teeth of the bevel, etc. Also cover 36
Since the handle case 35 is attached to the motor, no radial load is applied to the output shaft of the motor when it is carried around.

Since the present invention is constructed as described above, it has the effect of achieving the object stated at the beginning.

[Brief explanation of drawings]

Figure 1 is a side view of the conventional plan, Figure 2 is a sectional view of the same,
FIG. 3 is a sectional view showing a preferred embodiment of the present invention, and FIG. 4 is a side view of the same. 21...Fixed conical wheel, 21a...Shaft portion, 22...
...Moving conical wheel, 22a...Boss part, 24...Bearing case, 25...Feed screw, 30...Driven bevel gear, 29...Hole, 34...Handle shaft,
35...Handle case, 36...Cover, 33
...Drive bevel gear, 28...pin.

Claims (1)

[Scope of utility model registration request] The fixed conical wheel 21 is fixed to the rotating shaft 3 disposed on the cover 36, and the boss portion 22a of the movable conical wheel 22 is attached to the shaft portion 21a integral with the fixed conical wheel 21 along the axial direction of the shaft portion 21a. Fits freely and slides together.
A bearing case 24 is rotatably connected to the movable conical wheel 22, and a feed screw 25 is connected to the shaft body 21a.
are rotatably connected, and the threaded portion of the feed screw 25 and the threaded portion of the bearing case 24 are screwed together,
A handle case 35 is fixed to the cover 36,
A handle shaft 34 is rotatably supported on the handle case 35 so as to be perpendicular to the axial direction of the feed screw 25, and a drive bevel gear 33 is fixed to the handle shaft 34 and fixed to the handle case 35 side. A driven bevel gear 30 is rotatably supported on the cover 32, the driven bevel gear 30 and the driving bevel gear 33 are engaged with each other, and the driven bevel gear 30 and the feed screw 25 are connected through a hole 29 and a pin 28 loosely fitted therein. A belt-type continuously variable transmission characterized by being linked.