KR20150053689A - Spiral splines tapered weight clutch - Google Patents

Abstract

Provided is a cone clutch having a male cone driven by a shaft transferring torque from a power source to a female cone. The male cone can move from a first position disengaged from the female cone to a second position engaged with the female cone along a spiral spline on the shaft. A spring located on the shaft between the male and female cones forces the male cone to face the first position. The male cone is forced to move towards the second position by the action of the spiral spline during rotation of the shaft.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a spiral spline tapered weight clutch having a tapered weight,

The present invention relates to a clutch, and more particularly to a clutch, which is movable from a first disengaged position with an arm cone to a second engaged position along a helical spline surrounding a shaft for transmitting torque to a female cone, To a cone clutch with a male cone in the form of a helical spline having a tapered weight. The movement of the water cone from the first position to the second position is achieved by rotation of the shaft.

The cone clutch is in the form of a friction clutch. Unlike the flat engagement surfaces of the disk clutch, the cone clutch has frictional surfaces arranged in a small cross-section of the cone in which the facing portions move in the axial direction to engage and disengage the drive. The cone clutches are commonly used in the early 20th century because the friction surfaces fit better into a given diameter. However, with the development of friction materials, this additional friction surface was no longer needed and replaced with disc clutches.

The conventional cone clutch includes an arm cone, and the water cone is frictionally engaged with the arm cone by a spring. The cones are disengaged by the clutch control.

The objects of the present invention will become apparent from the following description.

The present invention relates to an electric motor comprising: a shaft extending from a power source and rotatable for transmitting torque; A water cone mounted on the shaft; The water cone being movable longitudinally along the shaft between a first disengaged position from the arm cone and a second position engaged and abutted against the arm cone in a frictional engagement manner, And in the second position, the water cone is constituted by a cone clutch which transmits torque from the shaft to the arm cone.

In another aspect of the invention, there is a spring mounted on the shaft and disposed between the water cone and the arm cone, forcing the two to move away from each other. The water cone moves to the second position when the shaft rotates at a sufficient rpm to apply sufficient force to the water cone to overcome the spring.

The foregoing is intended as a broad summary and is merely exemplary of the invention. This is not intended to limit the boundaries or essential requirements of the present invention. Other aspects of the invention will be understood with reference to the detailed description of the preferred embodiments and the claims.

The above and other features of the present invention will become apparent from the following description with reference to the accompanying drawings.
1 is an exploded perspective view of a preferred embodiment of a cone clutch according to the present invention.
Fig. 2 is a perspective view of the cone clutch shown in Fig. 1 in which a water cone engages with an arm cone; Fig.
3 is a perspective view of the cone clutch shown in Fig. 1 in which the male cone is disengaged from the arm cone.
4 is a partial cross-sectional perspective view of the clutch shown in Fig.
5 is a partial cross-sectional perspective view of the clutch shown in Fig.
6 is an exploded perspective view of a cone clutch according to another embodiment of the present invention.
7 is a partial cross-sectional perspective view of the cone clutch shown in Fig. 6 in which the male cone engages with the arm cone.
8 is a partial cross-sectional perspective view of the cone clutch shown in Fig. 6 in which the water cone is disengaged from the arm cone.

A preferred embodiment of the cone clutch according to the present invention is shown in Fig. 1 in an exploded view so that various elements are visible. A motor flywheel 11 is used to transmit torque from a power source such as a combustion, pneumatic, hydraulic or electric engine, and the motor flywheel has a shaft 25 extending from the motor flywheel, A spiral spline 15 is provided. Although a flywheel is shown in the preferred embodiment, this is not an essential feature of the present invention, but rather a helical spline enclosing the shaft extending from the torque source is an essential feature, i.e. an essential part of the present invention. The water cone 17 in the form of a tapered weight with the internal helical splines 16 is threaded with the helical splines 15. [ The helical splines 15 and 16 have an inclination and a size that can be engaged and fastened to each other. At the end of the shaft (25), a threaded portion (18) is provided. An arm cone 23 in the form of a tapered weight clutch drum with an internal friction wall 27 is mounted on the shaft 25 and is fixed to the shaft by a thrust bearing 24 and a nut 28, 25 and screwed into the threaded portion 18 at the end of the threaded portion 25 and screwed together. The tapered outer wall of the water cone 17 and the inner friction wall 27 of the arm cone 23 have dimensions and dimensions corresponding to each other so that the water cone 17 is inserted into the arm cone 23 . As shown in Figs. 4 and 5, the thrust bearing 25 is fitted in the hub 19 of the tapered weight clutch drum 23. The thrust bearing 24 allows the shaft 25 to rotate freely therein so that the rotation of the shaft 25 does not directly affect the rotation of the arm 23, 17). ≪ / RTI >

The spring 21 is positioned between the water cone 17 and the arm cone 23 and preferably between the retainer cup 20 and the bearing 22 on the shaft 25. In addition, it is contemplated that the water cone and the arm cone can have portions having a size and shape to accommodate either end of the spring, so that no need for retainer cups and bearings is contemplated. At least one of the spring receptacles may have any form of bearing to prevent damage to the spring (i.e., both ends of the spring may rotate at different speeds to prevent the spring from being damaged).

The water cone (17) has a first disengaged position from the arm cone (23) and a second position engaged with the arm cone (23). When assembled, the spring 21 separates the water cone 17 from the arm cone 23 so that the two parts do not contact each other (the disengaged position), as shown in Figs. However, when the shaft 25 is rotated, the shaft applies force to the water cone 17 via the spline 15. With rotation, the water cone 17 moves longitudinally along the axis of the shaft 25 toward the arm cone 23. When the rotation is sufficiently large, the force applied in the longitudinal direction to the water cone is sufficient to overcome the force applied by the spring, and the water cone moves into the arm cone 23 as shown in Figs. 2 and 4 ). Through the sufficient force, friction coupling between the water cone and the arm cone is effective, and the water cone 17 transmits torque from the helical spline 15 (and the shaft 25) to the arm cone 23. The armocon is preferably provided with a power output, such as a gear 26 or a pulley. Alternatively, a further spline with a shaft may be connected to the end of the arm cone 23 and connected to an additional power transmission assembly, such as a transmission.

The selection of the spring 21 is based on the size of the rpm required for engagement of the cone 17 and the arm cone 23. For example, the spring allows the water cone 17 to be separated from the arm cone 23 until the rpm reaches 500, and at that point the water cone 17 is inserted into the arm cone 23 And can be selected as a spring capable of transmitting torque to the armocon and being able to transmit torque to the recipient animal through the power output portion 26. When the rpm is less than 500 or the rotational speed of the arm cone 23 is larger than the rotational speed of the shaft 25, the water cone 17 can be disengaged.

When using a vehicle as an example, the cone clutch can provide a simple process for a manual shift. The clutch pedal may not be needed by clutch operation controlled by the rpm of the engine and the rotational speed of the wheel. For example, when the operation of the first gear is started, the driver can depress a gas pedal that provides torque-like power to the shaft 25, and the power is transmitted to the water cone 17 through the spline 25 . If the rpm is sufficiently high, the water cone 17 is engaged with the arm cone 23 and the power (torque) is transmitted by the power output section 26 through the arm cone 23 to other parts (such as the transmission) Lt; / RTI > When the gears are to be shifted, the driver simply removes his or her feet from the gas pedal, resulting in the rpm of the motor falling and causing the shaft 25 to disengage the water cone 17 from the arm cone 23. When the gears are shifted, the gas pedal can be sufficiently depressed to cause the water cone 17 to engage with the arm 23 again, and power is once again transmitted to the wheels. When the vehicle is moving down the hill, the user can take his or her feet off the gas pedal and consequently the rpm transmitted to the shaft 25 from the flywheel is reduced, while the arm cone 23 is based on the speed of the vehicle The high rpm can be continuously maintained, so that the water cone 17 is disengaged from the arm cone 23.

 Preferably, the water cone 17 and the arm cone 23 are made of metal. It is also conceivable that the forced engagement of the two does not require an additional friction material, but that the friction material is added to the metal surface, preferably to the interior of the arm cone 23. Over time, the cone 17 will be reduced in diameter as a result of use, and the reduced portions of the inner friction wall 27 of the arm 23, which is the object of use, will be increased in diameter. Thereby, the water cone 17 needs to move slightly further into the arm cone 23 in the longitudinal direction simply along the spline 15 until it engages the inner surface in a friction-locking manner.

6 to 8, the spring 21 'may be installed between the motor flywheel 11 and the water cone 17. In this case, both ends of the spring 21 'can be fixed to the motor flywheel 11 and the water cone 17 via the bolts 20' and 22 ', respectively. The motor flywheel 11 and the water cone 17 have fastening holes 11a and 17a for fastening the bolts 20 'and 22' on one side.

Although clutch use in a vehicle has been described heretofore, the cone clutch of the present invention can be used in a power tool such as an electric drill or in other devices requiring a clutch having the above-mentioned functions.

Although preferred and alternative embodiments have been described in detail, those skilled in the art will appreciate that certain modifications may be made without departing from the principles of the invention.

Claims (8)

A shaft extending from a power source and rotatable for transmitting torque;
A water cone mounted on the shaft;
And an arm cone configured to receive the water cone in a frictional engagement manner,
Said water cone being longitudinally movable along said shaft between a first disengaged position from said arm and a second position engaged and engaged with said arm cone,
Wherein the rotation of the shaft applies a force to move the water cone toward the second position so that in the second position the water cone transmits torque from the shaft to the arm cone, .
The method according to claim 1,
Wherein the shaft has an external helical spline.
3. The method of claim 2,
Wherein said water cone has an inner helical spline and a tapered outer surface, said water cone being threadably engaged with said outer helical spline.
The method of claim 3,
Wherein the arm cone has a tapered inner surface formed to frictionally engage the tapered outer surface of the water cone.
The method according to claim 1,
And the armocon is configured to transmit torque from the shaft.
The method according to claim 1,
Further comprising a spring mounted on said shaft disposed between said male cone and said arm cone.
The method according to claim 6,
Wherein the spring biases the cone to move toward the first position.
8. The method of claim 7,
Wherein said spring is compressed by said water cone at a pre-selected rpm of said shaft to move said water cone to said second position.

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