JPS61211512A - Crank device with bendable arm - Google Patents

Abstract

PURPOSE:To effectively convert reciprocating force to revolving force or vice versa by moderating an angle at which a crank is to be mooed suitable with respect to a connecting rod by the use of a bendable arm. CONSTITUTION:Rollers or gears which are formed on an arm are turned to bend the arm so that an angle between a connecting rod and the revolving direction of a crank pin is moderated suitably for transmitting reciprocating movement force to a crank. When the force of revolving motion is converted to the force of reciprocating motion, the conversion can be effectively performed by turning a crankshaft-side arm. The force of reciprocating motion and the force of revolving motion can be efficiently converted to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crank device in which a crank arm is used so as to be bent in two.

Conventional crank devices are made and used in such a way that the arm does not bend. However, in conventional crank devices, during crank operation, the direction of reciprocating motion and the direction of motion of the crank pin create an unfavorable angle on the connecting rod, resulting in a large loss in the conversion of the actual reciprocating motion force and rotational motion force. Ta.

The present invention aims to eliminate the above-mentioned drawbacks and efficiently convert reciprocating force and rotational force by using a bendable arm.

The present invention will be explained below based on illustrated embodiments.

In this device, when a roller or gear fixed to a crank arm makes one revolution around the inner circumference of the ring or gear, the length of the inner circumference of the ring or gear is twice the length of the outer circumference of the roller or gear. As a result, the crank pin of this crank device reciprocates on a fixed trajectory.

What you need to be careful about with this device is that rollers, gears, rings, etc. must be installed so that they do not interfere with the movement of the crank, and that the actual radius of the roller or gear that is installed on the crank arm is the same as that of the crankshaft. It must be equal to the length from the center to the center of the roller or gear. In this device, it is also possible to use a roller or a gear as a crank arm.

In detail, considering the case of converting reciprocating force into rotational force, the pushing force of the reciprocating force is transmitted to the crank pin, and the roller or gear attached to the crank arm begins to rotate, causing the ring or gear to rotate. It engages with the inner circumference to create a circular motion, rotating the crankshaft.

In the same way, the crank pin reciprocates,
Rollers or gears attached to the crank create a circular motion that rotates the crankshaft, thus converting reciprocating force into rotational force.

In this device, if the length from the center of the crankshaft to the center of the roller or gear is equal to the length from the center of the roller or gear to the center of the crank pin, the crank pin reciprocates on a straight line. In this way, the problem of angles occurring in the direction of the connecting rod and the reciprocating movement is eliminated.

Next, regarding the issue of the angle between the connecting rod and the direction of rotation of the crank pin, the roller or gear attached to the arm rotates and folds the arm, allowing for reciprocating motion by obtaining a more advantageous angle than conventional crank devices. Transmits power to the crank.

When converting rotational force into reciprocating force, the arm on the crankshaft side rotates, and the roller or gear attached to the crank arm engages with the ring or gear and rotates in a circular motion. so that it converts force more advantageously than traditional crank devices.

In this way, it has been confirmed through experiments that this crank device can efficiently convert reciprocating motion force and rotational motion force, while eliminating the drawbacks of conventional crank devices.

Figures 1 and 2 are examples of this crank device.
In this case, a roller and a ring are used, and the ring is plate-shaped.

[Brief explanation of drawings]

4. Figure 1 is a plan view of the crank part of this device. Figure 2 is a front view of the entire device.

Claims (1)

[Claims] Attach the crankpin side arm to the inside of the crankshaft side arm so that the arm of the crank device can be bent freely in the middle, and then attach a circular roller or gear around the contact point of these two arms. A ring or gear is fixed to the arm on the crank pin side and rotates this roller or gear on the inside.A ring or gear is assembled on the outside of the crank. In the case of a gear with twice the length, use one with twice the number of teeth, and the roller or gear on the crank side
The crank pin moves once around the inner circumference of the ring or gear.
A reciprocating crank device in which the crankshaft rotates once.