JPS5854766Y2 - Dash pot cylinder - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cylinder for an oil dashpot used in an electromagnetic device or the like.

Conventionally, this type of oil dashpot has a cylinder 1 made of a non-magnetic material that houses a plunger 2 made of a magnetic material and a return spring 3, and a cap 4 that is press-fitted into the opening of the cylinder 1. In many cases, the brake fluid was injected from the brake fluid injection hole 5 on the bottom of the cylinder 1, and then the brake fluid injection hole 5 was sealed by soldering or the like.

However, with such a cylinder, the brake fluid could flow out of the cylinder 1 if sufficient care was not taken in handling it after the brake fluid was injected.

In addition, since the bottom of cylinder 1 is flat, when the bottom of cylinder 1 is sealed by soldering etc.
There were drawbacks such as poor solder build-up properties.

The present invention was devised in view of the above-mentioned drawbacks, and its purpose is to easily temporarily seal the bottom of the cylinder after injecting the brake fluid from the bottom of the cylinder to prevent the brake fluid from flowing out. The purpose is to improve the build-up properties of solder.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

Reference numeral 1 denotes a bottomed cylindrical cylinder made of a non-magnetic material, and a constricted part 6 is formed near the outer periphery of a brake fluid injection hole 5 provided on the bottom surface of the cylinder 1 by constricting it inward. There is.

2 is a plunger made of a magnetic material housed in the cylinder 1 so as to be able to slide up and down; 3 is a return spring resiliently mounted in the cylinder 1; and 4 is a cap made of a magnetic material that seals the cylinder 1.

A coil 8 is wound around a bobbin 7 made of synthetic resin, an oil dashpot inserted through the bobbin 7 is fixed to a yoke 9, and an armature 1 is attached to the upper end of the yoke 9.
0 is pivotally supported, and a spring 12 is wound around the shaft 11 of the armature 10 to form an electromagnet device.

When a current equal to or higher than a set value flows through the coil 8 of the electromagnet device formed as described above, the plunger 2 is raised against the return spring 3 and the damping fluid, and when the plunger 2 comes into contact with the cap 4, the armature 10 is moved by the spring. 12, the suction operation is performed.

Also, if a large current such as a short circuit current flows through the coil 8,
The armature 10 is instantaneously suctioned without moving the plunger 2 described above.

In the present invention, after the plunger 2 and the return spring 3 are housed in the cylinder 1, the cap 4 is press-fitted into the opening of the cylinder 1 and soldered.

This soldering is done after injecting the brake fluid from the brake fluid injection hole 5.
This is done to prevent the cap 4 from popping out due to the expansion of the brake fluid due to the heat generated when the bottom surface of the cylinder 1 is soldered.

Next, the brake fluid is injected from the brake fluid injection hole 5 on the bottom of the cylinder 1, and easily by using the squeezed part 6 formed by squeezing the vicinity of the outer circumference of the brake fluid injection hole 5 on the bottom inward. It is used to perform temporary sealing and then securely seal it by soldering or the like.

Since the present invention has the configuration described above, the plunger 2 and the return spring 3 are housed in the cylinder 1, and the opening of the cylinder 1 is sealed with the cap 4 by soldering, etc., and then the brake fluid is injected into the bottom of the cylinder 1. In the case where the brake fluid is injected through the hole 5, the brake fluid injection hole 5 can be easily temporarily sealed, the brake fluid can be prevented from flowing out, and the solder build-up properties after the temporary seal can be improved.

[Brief explanation of drawings]

Figure 1 is a sectional front view of a conventional example, Figures 2 and 3 are an embodiment of the present invention, Figure 2 is an assembly sequence diagram, and Figure 3 is a sectional view of an example of use in an electromagnet device. be. 1...Cylinder, 2...Plunger,
3...Return spring, 4...Cap, 5
... Brake fluid injection hole, 6 ... Squeezed part.

Claims (1)

[Scope of utility model registration request] An oil dashpot consisting of a bottomed cylindrical cylinder 1, a cap 4 that seals the opening of the cylinder 1, a plunger 2 housed in the cylinder 1, a return spring 3, and a brake fluid. An oil dashpot cylinder characterized in that a brake fluid injection hole 5 with a constricted part 6 formed near the outer periphery is provided on the bottom surface.