CN204233743U

CN204233743U - Seesaw

Info

Publication number: CN204233743U
Application number: CN201420630733.9U
Authority: CN
Inventors: 郭天赐
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-10-28
Filing date: 2014-10-28
Publication date: 2015-04-01
Anticipated expiration: 2024-10-28

Abstract

This patent discloses a kind of seesaw, comprise base and balance plate, balance plate and base are articulated and connected by rotating shaft plane, the direction that rotating shaft rotates is parallel to ground, rotating shaft is fixedly connected with buffering cam, the radius of curvature that radius of curvature that cam is positioned at the rotating shaft left and right sides is greater than buffering cam top is cushioned when balance plate is in level, buffering cam is relative to the facade axial symmetry residing for spindle central, the top of buffering cam is also fixedly connected with two hawsers, two hawser bypass buffer cam shaft left and right sides respectively, when balance plate one end is landed, the end hawser far away that lands of distance balance plate is greater than with the horizontal range at the point of contact of buffering cam and cushions when balance plate is in level the distance that cam edge is positioned at rotating shaft left and right sides place, the end of hawser is all connected with equiponderant balancing weight, when balance plate is in level, two balancing weights depart from ground.This patent impact excessive to the health of people when can avoid one end of seesaw to drop on ground.

Description

Seesaw

Technical field

This patent belongs to recreational facilities field, more particularly, is a kind of seesaw.

Background technology

Seesaw is deeply by the recreational facilities that the ethnic group masses and children welcome; Existing seesaw is made up of base and the balance plate being installed on base usually; Seesaw easily because the unexpected weightlessness of balance plate side, and causes the end of opposite side to drop rapidly suddenly, and the speed on Crater face is excessive, and the health of the people be sitting on balance plate may be made to be subject to wound.

Summary of the invention

This patent provides a kind of seesaw for solving in known technology the technical problem that exists, and this seesaw can slow down rising or falling speed, impacts excessive when avoiding one end of seesaw to drop on ground to the health of people.

The technical scheme that this patent is taked for the technical problem existed in solution known technology is:

A kind of seesaw, comprise base and balance plate, described balance plate and base are articulated and connected by rotating shaft plane, the direction that rotating shaft rotates is parallel to ground, it is characterized in that: described rotating shaft is fixedly connected with buffering cam, the radius of curvature that radius of curvature that cam is positioned at the rotating shaft left and right sides is greater than buffering cam top is cushioned when balance plate is in level, buffering cam is relative to the facade axial symmetry residing for spindle central, the top of buffering cam is also fixedly connected with two hawsers, two hawser bypass buffer cam shaft left and right sides respectively, when one end of balance plate is landed, the end hawser far away that lands of distance balance plate is greater than with the horizontal range at the point of contact of buffering cam and cushions when balance plate is in level the distance that cam edge is positioned at rotating shaft left and right sides place, the end of hawser is all connected with equiponderant balancing weight, when balance plate is in level, two balancing weights depart from ground.

This patent have employed above technical scheme, and its beneficial effect is:

After one end of balance plate exceedes horizontal level when declining, hawser point of contact on buffering cam and the arm of force between rotating shaft mid point can strengthen gradually, the moment that the prevention balance plate that balancing weight produces continues to rotate also can increase, so the angular acceleration that balance plate rotates can reduce, when rotating to certain angle, the balancing weight meeting kiss the earth of thrown wall, this balancing weight can cannot produce moment, the moment stoping balance plate to continue to rotate can be increased suddenly, even can reduce the angular speed of balance plate, the linear velocity of occupant present position when final minimizing balance plate side is landed, make the health of the people on balance plate therefore can not be subject to wound.

Accompanying drawing explanation

Fig. 1 is the structural representation of this patent;

Fig. 2 is that this patent side when balance plate falls exceedes the view of horizontal level.

In figure: 1, base; 2, balance plate; 3, rotating shaft; 4, cam is cushioned; 5, hawser first; 6, hawser second; 7, balancing weight first; 8, balancing weight second.

Detailed description of the invention

For summary of the invention, the Characteristic of this patent can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:

Please refer to Fig. 1,

A kind of seesaw, comprise base 1 and balance plate 2, balance plate and base are articulated and connected by rotating shaft 3 plane, the direction that rotating shaft rotates is parallel to ground, rotating shaft is fixedly connected with buffering cam 4, the radius of curvature that radius of curvature that cam is positioned at the rotating shaft left and right sides is greater than buffering cam top is cushioned when balance plate is in level, the top of buffering cam is also fixedly connected with two hawsers---hawser first 5 and hawser second 6, two hawser bypass buffer cam shaft left and right sides respectively, when one end of balance plate is landed, the end hawser far away that lands of distance balance plate is greater than with the horizontal range at the point of contact of buffering cam and cushions when balance plate is in level the distance that cam edge is positioned at rotating shaft left and right sides place, the end of hawser is all connected with balancing weight---balancing weight first 7 and balancing weight second 8, hawser first 5 is connected with balancing weight first 7, hawser second 6 is connected with balancing weight second 8, when balance plate is in level, balancing weight departs from ground.

Particularly, buffering cam is an ellipse, and the oval center of circle is lower than the axle center of rotating shaft, and when balance plate is in level, oval major axis is in level and is all positioned at below the axle center of rotating shaft, and oval minor axis is by the axle center of rotating shaft.

The operating principle of this patent is:

As shown in Figure 2, when balance plate is horizontal, the hawser second 6 of buffering cam both sides drives balancing weight second 8 to depart from ground, and hawser first 5 drives balancing weight first 7 to depart from ground, the weight of balancing weight is born due to suspended counterweight block, hawser must be in level, so the point of contact of the hawser of both sides is two end points of oval major axis, so both sides balancing weight is identical relative to the torque arm length of rotating shaft, and the weight of two balancing weights is identical, so balancing weight first is identical with the moment that balancing weight second produces.So balancing weight does not now play a role for rotating shaft.

After the side of balance plate exceedes horizontal level when declining, hawser second 6 point of contact on buffering cam 4 and the arm of force between rotating shaft mid point can strengthen gradually, the moment that the prevention balance plate that balancing weight second produces continues to rotate also can increase, simultaneously, the point of contact of balancing weight hawser first and and rotating shaft mid point between horizontal range also can reduce, so the moment rotated on the left of balance plate of impelling that balancing weight first produces also can reduce.Shifting, buffering cam will produce one and stop the moment moved down on the left of balance plate, and this moment can constantly increase, so the angular acceleration that balance plate rotates can reduce, or angular acceleration becomes negative value, i.e. spin down.

When rotating to certain angle, during position namely shown in Fig. 2, the balancing weight first of thrown wall can kiss the earth, and hawser first can relax, so this balancing weight can produce to buffering cam the moment promoting to be rotated down on the left of balance plate.Buffering cam can the moment that produces of countershaft be at least the moment that balancing weight second 8 is produced by hawser second 6 countershaft center, and because the axle center of the center of gravity and rotating shaft that now cushion cam is not in same facade, the right side of the center of gravity now also rotating shaft again of buffering cam, the i.e. side of hawser second, balance plate is stoped to continue the moment rotated so buffering cam also can produce one, two moments of resistance combine, the moment stoping balance plate to continue to rotate can be increased suddenly, the angular speed of balance plate can be reduced, the linear velocity of occupant present position when final minimizing balance plate side is landed, thus the impact reduced when balance plate side is landed suffered by occupant, finally make the health of the people on balance plate therefore can not be subject to wound.

Claims

1. a seesaw, comprise base and balance plate, described balance plate and base are articulated and connected by rotating shaft plane, the direction that rotating shaft rotates is parallel to ground, it is characterized in that: described rotating shaft is fixedly connected with buffering cam, the radius of curvature that radius of curvature that cam is positioned at the rotating shaft left and right sides is greater than buffering cam top is cushioned when balance plate is in level, buffering cam is relative to the facade axial symmetry residing for spindle central, the top of buffering cam is also fixedly connected with two hawsers, two hawser bypass buffer cam shaft left and right sides respectively, when one end of balance plate is landed, the end hawser far away that lands of distance balance plate is greater than with the horizontal range at the point of contact of buffering cam and cushions when balance plate is in level the distance that cam edge is positioned at rotating shaft left and right sides place, the end of hawser is all connected with equiponderant balancing weight, when balance plate is in level, two balancing weights depart from ground.