JPS601390Y2 - link mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a link mechanism, and aims to provide a link mechanism that is highly accurate and easy to adjust.

A diffraction grating coupling mechanism for a double monochromator using the link mechanism of the present invention will be described below.

Double monochromators, which use multiple diffraction gratings as dispersive elements and synchronously rotate the diffraction gratings to obtain highly pure monochromatic light, have been widely used as high-resolution spectrometers, but conventional synchronous The rotation mechanism was as shown in FIGS. 2 and 3.

In other words, in FIG.
1 and 22. In the above mechanism, a plurality of diffraction gratings 25 are connected.

The synchronous rotation accuracy of 26 is for each feed screw 21.

22, the resolution is limited to the machining accuracy of the feed screw, and both diffraction gratings 25.

Accurate synchronization of 26 was extremely difficult.

On the other hand, FIG. 3 shows a mechanism using a single feed screw 32 and a link mechanism.

In the above mechanism, the synchronous rotation accuracy of the plurality of diffraction gratings 35, 37 is determined by the pins 33, 39 arranged at the tip of the lever 34, 38.
The length of each lever changes depending on the position of the pin 33.
．． If the lever 34.38 is not placed parallel to the rotation axis of the diffraction grating 35.37, the length of the lever 34.38 will change. Accurate synchronous adjustment of both diffraction gratings 35 and 37 is mechanically extremely difficult.

Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks and to provide a highly accurate and easily adjustable coupling mechanism.

An example of the present invention will be described in more detail with reference to the drawings as follows.

In FIG. 1A, vertical levers 3 and 4 and a horizontal lever 13 are provided, and one end of the vertical lever 3 and the horizontal lever 13 are connected by a lever connecting mechanism 11, and the other ends of the vertical lever 4 and the horizontal lever 13 are connected with the lever. They are connected by a mechanism 12.

The other ends of the vertical levers 3 and 4 are provided with bearings for the diffraction grating rotation axis 1°2.

Lever connection mechanism 1 provided at both ends of the horizontal lever 13
The mechanism 1.12 is provided with a mechanism in which two balls 17 are arranged, as shown in the opening in Figure 1.

The ball 17 is a hardened steel ball with good sphericity.

A ball receiver 40 is directly provided on the upper side of the horizontal lever 13,
A ball holder 14 provided with a notch 15 is fixed to the lower side, and a ball holder 40 is installed as shown in the figure.

Then, screw 1 in the notch 15 so that the width can be adjusted.
6 is provided.

A ball receiver 40 is provided at the tip of the vertical levers 3 and 4,
As shown in the figure, the ball receiver 40 of the vertical levers 3 and 4 is sandwiched between the two balls 17, and by not bending the width of the notch 15 of the ball receiver 14 with the screw 16, the gap between the hole 17 and the ball receiver 40 is maintained. can be removed to adjust the play in the coupling mechanism 11, 12.

Before assembly, the countersunk hole portion of the ball receiver 40 is made of a hardened steel ball with good sphericity, which is the same as the ball 17, and the steel ball is pressed into the countersunk hole portion of the ball receiver to a certain size.

The first illustration is an explanatory view before pressing, and the same figure is an explanatory view after pressing.

That is, by being pressed, the countersunk hole portion on which the ball 17 of the ball receiver 40 is placed becomes the same spherical surface as the ball 17, and the spherical precision of the surface in contact with the ball 17 is improved, and the surface in contact with the ball 17 is improved by being pressed. The work-hardened surface provides high precision, lightness and smooth movement, and reduces wear.

By being pressed, the outer diameter of the ball receiver 40 swells and is fitted into the vertical levers 3, 4 and the horizontal lever 13.

Each ball receiver 40 is fixed.

As mentioned above, the lever coupling mechanism 11.12 is assembled by arranging two balls 17.

Figure 1-2 shows a link mechanism that allows fine adjustment of the length of the lever.

The vertical lever 42 has an elongated vertical hole 9 in the axial direction, and a fine adjustment screw 6 is provided in the center of the hole 9 as shown in FIG.

Note that the vertical lever 41 is constructed in the same manner as the vertical lever 42 described above.

Next, the horizontal lever 43 is provided with a hole 10 similarly to the vertical lever.

The lever connection mechanism is the same as the port 49 in the same figure.

In the above configuration, the length of the vertical lever 41.42 is 13,
B' can be accurately adjusted by adjusting the fine adjustment screws 5 and 6.

On the other hand, the lengths A and A between the horizontal lever 43 and the rotating shafts 1 and 2
' is precisely adjusted by the fine adjustment screw 7 of the horizontal lever 13.

As before, the linkage is precisely aligned to form a perfect parallelogram.

Therefore, according to the present invention, the link mechanism can be made into a perfect parallelogram, and the play of the lever connection mechanism can be ideally adjusted, so that the rotating shafts 1 and 2 can be rotated in perfect synchronization. This makes it possible to obtain a highly accurate and easily adjustable link mechanism.

The above-mentioned link mechanism is used as a diffraction grating coupling mechanism of a double monochromator as follows.

That is, a diffraction grating is fixed on each of the rotating shafts 1 and 2, and a rotating shaft rotation mechanism such as a feed screw is connected to one of the rotating shafts to operate the link mechanism.

Then, the respective diffraction gratings on the rotating shafts 1 and 2 rotate completely synchronously through the link mechanism, and high purity monochromatic light can be obtained, thereby making it possible to obtain a high resolution spectrometer.

In this way, a highly accurate and easily adjustable link mechanism can be easily obtained, which has great practical effects.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention, Fig. 1A is a perspective view showing an embodiment in which the lever length is fixed, the opening of Fig. 1 is a partial sectional view taken along the line X-X' in Fig. 1A, Figure 1 C is y-y in Figure 1 2.
Fig. 1 2 is a perspective view of an embodiment that allows fine adjustment of the lever length, Fig. 1 E and 1 show the ball receiver provided at the tip of each lever, the front of the ball press, and the press. FIG. 7 is an explanatory diagram showing the subsequent relationships.

Claims (4)

[Scope of utility model registration request] (1) The vertical levers 3, 4 and the horizontal lever 13 are connected by a lever connecting mechanism 11.12, each of which is provided with a plurality of balls 17, and the plurality of balls 17 are connected to each other. The link mechanism is characterized by a structure in which the ball 17 is connected and adjusted by a ball holder 14 consisting of a notch 15 and a screw 16. (2) The vertical levers 3, 4 and the horizontal lever 13 have holes 8, 9, 10 for adjusting the length, and fine adjustment screws 5, 6.
7, and the shapes of the holes 8, 9, 10 of the vertical levers 3, 4 and the horizontal lever 13 are changed to adjust the length of each lever. link mechanism. (3) The spectrometer according to claim 1, which is used as a diffraction grating coupling mechanism of a double monochromator in which a plurality of diffraction gratings rotate synchronously. (4) The spectrometer according to claims 1 and 2, wherein the link mechanism is used as a diffraction grating coupling mechanism of a monochromator that rotates a plurality of diffraction gratings synchronously.