Shock absorbing cam

Abstract

To provide an impact absorbing cam in which, when one rotating permanent magnet collides with the other fixed permanent magnet by an attractive force, the impact is temporarily stored in an expansion spring and released at the time of parallelism when the attractive force between the permanent magnets becomes maximum, and the attractive force is eliminated to continue the rotating motion.SOLUTION: A cam cylinder 3 in which a driver cam 2 and an expansion spring 4 are housed is provided, and an oblique notch 3-1-3 for a driver cam pin 2-1 is provided on the right side of the center of the cam cylinder 3. The driver cam pin 2-1 is provided near one end portion of the driver cam 2, the follower pin 200 is provided on the rotary permanent magnet shaft 300, and when one rotating permanent magnet collides with the other fixed permanent magnet due to an attractive force, the impact is temporarily stored in the expansion spring 4 and is released at the time of parallelism when the attractive force between the permanent magnets is maximized, so that the attractive force disappears and the rotational movement can be continued.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a shock-absorbing cam that temporarily stores the impact in an expansion spring when a rotating permanent magnet collides with a fixed permanent magnet due to the attractive force of the other permanent magnet, and releases it when the attractive force between the permanent magnets reaches a maximum when they are parallel, thereby eliminating the attractive force and allowing the rotation to continue. [Background technology]

[0002] As this type of technology, control using electromagnetic force is common. Summary of the Invention [Problem to be solved by the invention]

[0003] As mentioned above, there is an advantage in that it is easy to control, but it is not without problems. The present invention provides a shock absorbing cam that, without using electricity, temporarily stores the impact in an expansion spring (4) when one fixed permanent magnet collides with another rotating permanent magnet due to the attractive force, and releases it when the attractive force between the permanent magnets is at its maximum and parallel, thereby eliminating the attractive force and allowing the rotation to continue. [Means for solving the problem]

[0004] The shock absorbing cam (1) according to the present invention comprises a driving cam (2) and a cam barrel (3) in which a return spring (4) is placed. The cam barrel (3) has a long, thin cam barrel fixing piece (3-1-1) with a mounting hole (3-1-2) at one end of the cam barrel (3) and is provided at a right angle outward in four directions. Also, a diagonal notch (3-1-3) for a driver cam pin (2-1) is provided near the right center of the cam barrel (3). The driver cam (2) has a protrusion (2-3) at one end and the driver cam pin (2-1) near the other end. A follower pin (200) is formed on the rotating permanent magnet shaft (300) at an appropriate location to interact with the protrusion (2-3) of the shock absorbing cam (1). [Effects of the Invention]

[0005] In the present invention, when one fixed permanent magnet collides with the other rotating permanent magnet due to the attractive force, this impact is temporarily stored in the expansion spring (4) and is released when the attractive force between the permanent magnets becomes maximum when they overlap parallel to each other, thereby eliminating the attractive force and enabling continuous rotation. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 2 is a side view of the entire shock absorbing cam including the permanent magnet. [Figure 2] FIG. 10 is a side view of the shock absorbing cam before the follower pin acts on it. [Figure 3] FIG. 10 is a side view of the shock absorbing cam after the follower pin has acted on it. [Figure 4] FIG. 10 is a side view showing a state in which the follower pin is disengaged from the shock absorbing cam. [Figure 5] FIG. 10 is a side view showing the shock absorbing cam acting in the opposite direction on the follower pin. [Figure 6] FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0007] Figure 1 shows a full-scale prototype for confirming operation. It uses a neodymium magnet, 30mm x 40mm diameter, F41kg (100), the rotating permanent magnet shaft (300) is made of aluminum pipe 12mm diameter, and the rest is made of PVC pipe. When it is moved continuously between Figures 3 and 5, the attractive force disappears and the rotating permanent magnet shaft (300) can be rotated by hand. Figure 2 shows the initial state of the shock absorbing cam. FIG. 3 shows the state in which the driver cam (2) is inserted by the follower pin (200) and the driver cam pin (2-1) has moved to the left front. FIG. 4 shows a state in which the follower pin (200) is disengaged from the driving cam (2) as the driving cam (2) rotates leftward. In FIG. 5, the return spring returns to its original position and rotates the follower pin (200) backward, and the movements of FIGS. 4 to 5 serve to eliminate the attractive force of the permanent magnet. [Industrial Applicability]

[0008] Bearings with permanent magnets are provided at both the left and right ends, and a rotating permanent magnet shaft is provided in the middle part, passing through the left and right bearings. The rotating permanent magnet shaft is rotated by a small motor to form an amplitude motor. [Explanation of symbols]

[0009] 1 Shock absorbing cam 2. Original cam 2-1 Original Campin 2-3 Cam protrusion 3 Cam barrel 3-1-1 Cam barrel fixing piece 3-1-2 Cam barrel mounting hole 3-1-3 Diagonal notch for drive cam pin 4. Return spring 100 permanent magnets 200 Follower Pin 300° rotating permanent magnet shaft

Claims

1. A shock absorbing cam comprising a cam barrel (3) into which a driving cam (2) and a return spring (4) are inserted, wherein the cam barrel (3) has elongated cam barrel fixing pieces (3-1-1) with mounting holes (3-1-2) provided at four sides of one end of the cam barrel (3) at right angles outward, and a diagonal notch (3-1-3) for a driving cam pin (2-1) is provided near the right center of the cam barrel (3), and the driving cam (2) has a cam protrusion (2-3) at one end and the driving cam pin (2-1) near the other end.

2. 2. The shock absorbing cam according to claim 1, wherein the rotating permanent magnet shaft (300) is provided with a follower pin (200) at a suitable location to interact with the protruding portion (2-3) of the driver cam (2).

Images