JPS6241920Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a spiral bimetal housing structure that can be said to be the heart of the Sahl Louver, which is an active thermal control element used for temperature control of artificial satellites. Thermal louver is attached to the outer surface of a satellite, and by generating driving torque due to temperature changes in a spiral bimetal and rotating a blind-shaped blade piece, it controls sunlight received by the satellite. It controls the heat flux dissipated into space.

[Conventional technology]

A conventional thermal louver has an appearance as shown in FIG. 1, and the bimetal shown in FIG. 2 is directly attached to the thermal louver's casing as shown in FIG. 3. On the other hand, the thermal louver is sensitive to temperature and has the characteristic that its spiral length expands when the temperature gets high and contracts when it gets cold, so it generates an output torque due to temperature changes, which causes the blade 1 of the thermal louver shown in Fig. It has the function of closing and opening.

[Problem that the invention attempts to solve]

However, it is difficult to manufacture the spiral bimetal 2 shown in FIG. The manufacturing process is corrected by rotating and sliding the attached pin 6 shown in FIG. 3 within the arc-shaped hole 7.

Next, for the opening/closing operation of the blade 1 in FIG. 1, in order to set the opening/closing starting temperature, either the bimetal terminal positions 3 and 4 in FIG.
It was necessary to make the angle larger.

As mentioned above, in the past, assembly and preparation work was required due to the manufacturing accuracy of the bimetal 2, the angle adjustment of the rotation angle, the restriction of the arcuate hole 7, and the necessity of directly attaching the bimetal 2 to the housing frame 5 to adjust the angle, bearing alignment, etc. It was extremely complicated.

[Means for solving problems]

In order to eliminate such complicated processes, the present invention replaces the conventional method of adjusting bimetals by directly attaching them to the housing frame, by housing them in a cylindrical case as shown in Figures 5 and 6, and converting them into modules. By doing so, it is possible to obtain a bimetal module of a thermal louver that is easy to adjust and highly reliable, and whose angle settings can be arbitrarily adjusted as a single standard component.

That is, in the present invention, a drive shaft fixed at the center end of a spiral bimetal is coupled to a rotating shaft of a blade of a thermal louver, an outer end of the bimetal is fixed to an inner wall of a housing cylinder of the bimetal, and the housing cylinder is Although it can rotate concentrically with respect to the lid fixed to the housing frame, it can be fixed at any position, and the rotation of the drive shaft is restricted by a stopper piece provided on the drive shaft. The present invention provides a bimetal accommodation mechanism for a thermal louver, that is, a bimetal module.

[Effect]

If this bimetal module is attached to the frame of the thermal louver and the drive shaft is connected to the rotary shaft of the blade, the blade opens and closes in response to changes in temperature.

〔Example〕

FIG. 4 shows one embodiment of the present invention, and for ease of understanding, the overall structure of the thermal louver will be explained. Figure 1 shows the blade that opens and closes at 90°.
5 is a box frame, 8 is a bimetal module,
Conventionally, bimetals were directly attached to the housing frame 5 one by one for angle adjustment and alignment, but in the present invention, manufacturing errors of the bimetal and the temperature setting position of the blade 1 are eliminated at the level of individual parts of the bimetal module 8. It has been improved to allow for 90° rotation regulation and alignment of the drive shaft.

Next, the mechanism of the bimetal housing cylinder according to the present invention will be explained. FIG. 5 shows a cross-sectional view thereof, in which a spiral bimetal 2 is housed in a cylindrical housing tube 10, and the outer end 4 of the bimetal is sandwiched between the inner wall of the housing tube 10 and a block 11. 11
is fixed from the outside with screws 12 to fix the outer end of the bimetal to the inner wall of the housing cylinder. The center end 3 of the spiral bimetal is inserted into the slit of the drive shaft 9 and fixed. FIG. 6 shows a top view of the housing cylinder, 13 is a stopper piece for regulating the rotation of the drive shaft 9, 14 is a nut for fixing the stopper piece to the drive shaft 9, and 15 and 15' are the movement angles of the stopper piece 13. Shows the stopper screw that regulates the By loosening the nut 14 and adjusting the stopper piece, the rotation angle of the center end of the bimetal due to temperature changes can be set between 15 and 15'. After the housing cylinder is attached to the housing frame, fine adjustments are made using the stopper piece 13. FIG. 7 is a longitudinal cross-sectional view showing the state in which the bimetal housing cylinder 10 is attached to the lid 16.

The outer periphery of the lower edge of the housing tube 10 protrudes like a brim, and this portion slides onto the stepped portion of the upper surface of the lid 16 of the housing tube 10, allowing the housing tube to rotate 360 degrees relative to the lid 16. Reference numeral 18 indicates a ring nut for fixing the housing cylinder 10 to the lid 16. The lid 16 is provided with a plurality of mounting holes 17 for fixing the lid to the housing frame. The drive shaft 9 passes through the center of the upper wall of the storage cylinder and the lid 16 and is rotatably supported, and its lower end protrudes from the bottom surface of the lid 16 and has a square hole 19, which is connected to the rotation axis of a blade (not shown). combined. In addition,
In the figure, reference numeral 20 denotes a rubber damper, which is provided on the upper wall of the housing cylinder and the upper surface of the lid, and acts as a damper for the housing cylinder due to bimetal vibrations, etc. The bimetal housing cylinder according to the present invention has the above-mentioned structure, but before attaching it to the housing frame, the output torque with respect to temperature changes of the drive shaft is adjusted by adjusting the corresponding position of the housing cylinder and its lid. After installation, make fine adjustments using the stopper.

[Effect of idea]

A bimetal louver using this bimetal housing cylinder has the following advantages.

Bimetal is housed in a housing cylinder and made into a module, so it can be tested and evaluated as a single module, and parts with performance according to requirements can be supplied.

Since the bimetal is fixed to the housing tube and can be adjusted to any angle, the desired bimetal angle setting accuracy can be easily obtained, and changes in the temperature control range can be flexibly accommodated. In addition, temperature setting is easier and there are fewer setting errors than conventional types.

Since the temperature setting is arbitrary, constraints on bimetal manufacturing are largely removed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the appearance of a conventional thermal louver, Fig. 2 is an example of an enlarged view of a bimetal, Fig. 3 is a conceptual perspective view of attaching the bimetal of a conventional thermal louver to a housing frame, and Fig. 4 The figure is a partial perspective view of an embodiment of the thermal louver according to the present invention.
The figures are a cross-sectional view of an embodiment of a bimetal storage cylinder according to the present invention, FIG. 6 is a top view, and FIG. 7 is a longitudinal cross-sectional view. In the diagram, 1: blade, 2: bimetal,
3: Bimetal center end, 4: Bimetal outer end,
5: Housing frame, 6: Pin, 7: Arc-shaped hole provided in housing frame 5, 8: Bimetal housing cylinder, 9: Drive shaft, 10: Accommodating cylinder, 11: Block, 12: Fixing screw, 13 : Stopper piece, 14: Nut, 1
5, 15': Stopper screw, 16: Lid, 17:
Mounting hole provided in the lid 16, 18: Ring nut, 19: Square hole provided at the end of the drive shaft 9, 2
0: Rubber damper.

Claims (1)

[Scope of utility model registration request] A drive shaft fixed at the center end of the spiral bimetal is coupled to a rotating shaft of a blade of a thermal louver, an outer end of the bimetal is fixed to an inner wall of a housing cylinder of the bimetal, and the housing cylinder is attached to a housing frame. Thermal louver can be rotated concentrically with respect to a fixed lid, but can be fixed at any position, and the rotation of the drive shaft is restricted by a stopper piece provided on the drive shaft. Bimetallic accommodation mechanism.