JPS58170936A - Nonlinear air-spring - Google Patents

Abstract

PURPOSE:To obtain optional nonlinear characteristic of an air spring in such a way that the volume of the air-spring and the contitution of air quantitly are changed by the displacement and speed of the spring respectively. CONSTITUTION:A grooved shaft 3 is fixed to a face plate 2 on one side of an air chamber 1, while a face plate 4 on the other side is connected to a conduit 6 which links an air chamber 5 to itself and additionally serves for a guide to the grooved shaft 3. When the face plate 2 is displaced in the direction of X>O, and the groove end 7 arrives at the face place 4, the air chamber 1 is cut off from the air chamber 5 because the conduit is obturated. Thus, each spring rigity due to the air in the air chamber 1 and the air in the air chamber 5 becomes larger than that when both chambers are connected together, because the volume is divided into two. In consequence, optional nonlinearity can be obtained by combining the length of the groove, the sectional area of the shaft, and the volume of the air chambers in various ways.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nine-air spring that has arbitrary nonlinearity by changing the configuration of the volume and air amount of the air spring depending on the displacement and speed of the spring.

Conventionally, nonlinearity has been imparted to the spring characteristics of air springs by changing the shape of the diaphragm contact surface for diaphragm type air springs, but there is no effective method for bellows type springs. Also, in the former case, it was difficult to create an asymmetry in which the spring characteristics differ greatly between the compression side and the expansion side.

This invention aims to obtain an air spring with a strong asymmetry in which the spring characteristics are greatly different between the compression side and the expansion side, and to change the spring characteristics depending on the speed. In order to be able to adjust the overall spring characteristics, the piston rod can be used as a hammer and used directly in air cylinder type foil stamping machines and other machines.

The present invention will be explained based on the drawings. In FIG. 1, a grooved shaft (3) is fixed to one face plate (2) of an air chamber (1). The other face plate (4) serves as a guide for the grooved shaft (3) and is connected to a conductive pipe (6) that connects the air chamber (5). When the face plate (2) is displaced in the X>O direction and the groove end (7) reaches the face plate (4), the conduction pipe is blocked and the air chamber (1
) and the air chamber (5) are cut off. This allows the air chamber (
1) The stiffness of each spring due to the air inside the air chamber (5) and the air inside the air chamber (5) is larger than the stiffness when the volume is divided into two, compared to when the spring is electrically conductive. Since these constitute parallel springs, the overall spring stiffness further increases and exhibits the properties of a hard spring.Conversely, the face plate (2) is displaced in the X<O direction, and the groove end (7) is When entering the inner figure from (4), the air chamber (1) and air! (5) are connected through the conduit tube (6) and the volume is unified, so the spring stiffness is reduced. And shows the properties of soft bones. The change in stiffness of the force spring depends on the position of the groove end (7), so if the groove is made longer, the stiffness changes from AtO to 0 as shown in Figure 2. In other words, a short slip can be moved to Ol.

Also, by changing the cross-sectional area A of the grooved shaft,
The stiffness of the spring can be changed, and when the excluded volume X in the conduction pipe becomes larger than the volume of the air chamber (5),
Since the spring stiffness of X〉Oa can be further increased, arbitrary nonlinearity can be obtained by combining the length of the groove, the cross-sectional area of the shaft, and the volume of the air chamber.

@Figure 3 shows an embodiment in which a shutoff valve and a valve seat are built into a bellows type air spring, so a valve seat α◆ is provided between the air chamber 01) and the air chamber 09, while the face plate α→ Fix 1 to the quick-release valve. When the face plate (1a is displaced in the X>O direction,
In the case of figure a, the shutoff valve 0 is placed on the valve seat α4 and the air chamber (
b) loses its effect as a spring, and only the air chamber (lG) becomes effective. In the case of figure b, the shutoff valve a3 is separated from the valve seat a4, and the air chambers (to) are connected and integrated. x This is reversed for displacement in the zero direction, and the splash characteristics are as shown in Figure 4, with solid lines in the case of colored circles and broken lines in Figure b.Similar to the case of Figure 2, the quick-acting valve By changing the fixed height of α], the switching point can be moved.

FIG. 5 shows an embodiment in which a return pipe is attached to a cylinder. Holes are made at two locations in the cylinder Q]) and the return pipe (A) is attached. When the piston (c) is displaced in the X>0 direction and blocks one hole (c) of the return pipe (a), the air chamber in the cylinder Ql) is
It is divided into two parts (g) and (a) to form a parallel spring, increasing the stiffness of the spring. On the other hand, when the piston (C) is displaced in the X<0 direction and passes through the hole (C), the air chamber, which was divided into two, is connected to the air chamber through the return pipe, and the air is returned from the pipe to the pipe. Therefore, the spring stiffness is reduced. Piston (c)
If the velocity of motion of This switch 9 is a hole (c)
Since it depends on the position of the other hole 4, if it is installed far away from the other hole 4, the switching point will be moved from P to P as shown in Figure 6, and the stiffness of the spring of the air chamber will be thickened and it will be moved closer. When installed in the air chamber, it is possible to move from P to P and reduce the stiffness of the spring in the air chamber.

By combining this with the embodiments shown in Figure tK1, Figure 3, and Figure wIJ5, it is possible to provide even more complex spring characteristics.

An example is shown in FIG. Drill holes in two different diameters of the cylinder (31) and attach the return pipe (32) f.

, piston:/ When (33) and (33&) are displaced in the X>O direction and pass through both holes of the return pipe (82) at the same time, the air chambers (34) and (34a) are opened by the return pipe (32).
is connected. Piston (33m) is empty chamber (34m)
Since the corpse 9 is returned to the air chamber (34), the action of the piston (33a) becomes invalid, and this part Fi air chamber (34) and the piston (33) with a volume of (341!L) are removed.
)'s air spring. This and the air spring in the air chamber (34b) constitute a parallel spring. At this time, if the volumes of the air chambers (34) and (34a) are made sufficiently larger than the volume of the air chamber (35), the air will be forced so that only the air chamber (34b) can be regarded as an air splash.

Conversely, when histones (33) and (33m) are displaced in the X<O direction and pass through both holes again, the air chambers (34 &) and (34b) are connected by the return pipe, and this part becomes an air chamber. A piston (3 ha) with a volume of (34 b)
3m) air spring. This and the air spring (34) form a parallel spring, but in this case, 49 air chambers (34)
) If the volumes of the air chambers (s4m) and (34b) are sufficiently large compared to the volume of the air chambers (34), the air springs will mostly be formed by the air chambers (34). Therefore, the larger the ratio of the volumes of the air chambers (34) and (34b), the more asymmetrical a nonlinear spring can be obtained.

FIG. 8 is a book showing an embodiment of a return pipe including a tank and a restrictor valve. The tank (41) is used to adjust the volume to obtain the required spring stiffness, and the throttle valve (42) is used to adjust the change in spring stiffness depending on the movement speed of the piston (43). In Figure 1, two holes are made in the cylinder (44) and the holes are returned to the outside of the cylinder (44) 9 (45
), and a tank (41) and a throttle valve (42) are installed in the middle of the pipe.
) is installed.

Figure b shows a case in which a return pipe (a5m) and a tank (41a) are constructed by a cavity provided between the walls of the cylinder (44a), and a throttle valve (4h) is also incorporated. Figure 0 shows a case in which the tank and throttle valve are omitted, and a groove (45b) is provided in the inner wall of the cylinder (44b) to function as a return pipe.

As explained above, the present invention has the effect of obtaining a nonlinear generator with particularly strong asymmetry by changing the configuration of the air generator using the displacement and speed of the spring.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of an embodiment using a grooved shaft, Fig. 2 is a spring characteristic in that case, Fig. 3 is a longitudinal cross-sectional view of an actual M-mode camphor with an Fi connection valve, and Fig. 4 is a longitudinal cross-sectional view of an embodiment using a grooved shaft. The characteristic, Figure 5 is back [
A longitudinal section of the embodiment with seven pipes, FIG. 6 shows the runout characteristics in that case, FIG. 7 shows a longitudinal section of the embodiment with return pipes in the case of two pistons, and FIG. 8 includes the tank and throttle valve. A vertical cross-sectional view of an embodiment with a return pipe is shown (
1) (5), αυ (2), (c) Xiong and (34) (3
4a) (34b) is an air chamber. Patent applicant: Kanazawa City Inventor: Takashi Yokoyama
Kunio KoizumiFigure 1Figure 3Figure 5Figure 2Figure 4Figure 6

Claims (1)

[Claims] Depending on the displacement of the spring, the connection of the weight air chamber can be switched, the volume configuration as an air spring can be changed,
By restricting the air flowing between the divided air chambers, the stiffness of the spring can be changed by changing the composition of the air amount depending on the speed of the spring, and non-linearity can be achieved in the spring characteristics without drawing or exhausting the air to the outside. A nonlinear air spring characterized by