JPS5819655A - Solar tracking and focusing device - Google Patents

Abstract

PURPOSE:To contrive to lighten the device by a method wherein a lens trestle is pivotally supported with a traveller, which is engaged onto horizontal screw shafts rotatably supported on a rotary platform, and the rotary platform and the screw shafts are driven rotatingly. CONSTITUTION:A pair of the screw shafts 16 are provided nearly horizontally and revolutionally about the axis center of a fixed screw shaft 12 fixed on a fixed platform 11 on the rotary platform 14, which rotates about the fixed screw shaft 12 on the fixed platform 11. The traveller 17 engages with the screw shafts 16. The lens trestle 18 is pivotally supported with a pair of struts 19 and links 21 pivotally supported to the traveller 17. Furthermore, a worm 24 engaged with the screw shaft 12 is revolutionally driven through a motor 22 and a reduction gear 23, both of which are arranged on the platform 14. In addition, one end of each screw shaft 16 is supported with a bearing stand 25 and the other end is rotationally driven through a reduction gear 27 by means of a motor 26 arranged on the platform 14. The lens trestle 18 can face normal to the sun by controlling the amounts of revolution of the screw shaft 16 and of the worm 24, resulting in reducing the weights of the rotary platform 14, the motor 22 and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar tracking and concentrating device used in solar cell power generation devices, solar heat collecting devices, and the like.

Conventionally, a solar tracking and concentrating device used in a solar cell power generation device or a solar heat concentrator is driven by a motor 2 and a transmission 3, which are installed and fixed on a support column 1, in multiple rotations, as shown in Fig. 1. A support stand 5 is fixed to the rotating shaft 4, and a drive motor 6, a transmission 7, and a column 8 are installed on the support stand 5, and a rotating shaft 9 is driven by the drive motor 6 and the transmission 7.
A typical structure is such that the surface of the lens mount 10 is always tracked so as to face the sunlight by attaching the lens mount 10 to the lens holder and controlling the rotation amounts A and B of the rotation axes 4.9 that are orthogonal to each other. It is true.

However, the conventional structure described above is not unstable because the center of gravity of the entire device is high, and the rotating shaft 4 supports most of the weight of the entire device. 1. Therefore, drive motor 2 and transmission 3
However, there are disadvantages in that the device becomes large in size, the support structure must be made sturdy, and the entire device becomes heavy. In addition, with this structure, the rotational moment due to the weight of the lens mount 10 with respect to the rotation axis 9 is reversed forward and backward at the time when the lens mount 10 becomes horizontal. The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and for this reason, the solar tracking and condensing device according to the present invention has a drawback that accurate tracking control cannot be performed due to incorrect adjustment. a rotary table supported on the fixed table and capable of rotating a vertical shaft; a screw shaft horizontally supported on the rotary table and rotatable about an axis; and a screw shaft screwed onto the screw shaft. the lens mount, which is pivoted by a link member whose one end is pivotally supported by the movable element and the pillar, and which is arranged at an angle. The rotary table and the screw shaft are rotationally driven by a drive motor installed on the rotary table via a transmission, which reduces the weight of the entire device and provides good tracking accuracy. Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 and 3 show a preferred embodiment of the present invention, in which reference numeral 11 indicates a fixed base having a fixed screw shaft 12 at the center and a wheel running surface 13 around the periphery, and 14 a fixed base having a wheel running surface 13 at the periphery.
A rotary table having wheels 15 running thereon and rotated around a fixed screw shaft 12, a pair of left and right screw shafts 16 installed horizontally on the rotary table 14 and rotated around their axes; Reference numeral 17 indicates a slider screwed onto the screw shaft 16, and reference numeral 18 has an intermediate portion pivoted by a pin 20 to a pair of left and right supports 19 erected on the rotary table 14, and one end is pivoted to each slider. Lens mounts each having one end pivotally supported by the other end of the supported link member 21 are shown.

The rotation of the rotary table 14 around the fixed screw shaft 12 causes a worm 24, which is rotationally driven via a motor 22 and a reducer 23 installed on the rotary table 14, to engage the fixed screw shaft 12 extending through the opening of the rotary table 14. This is done by rotating the worm 24.

Further, the rotation of the screw shafts 16 is carried out by supporting one end of each screw shaft by an anastomosis 25 and supporting the other end of the screw shaft by a rotary table 1.
This is done by rotating a motor 26 installed on the motor 4 via a multi-reduction gear 27. By rotating the screw shaft 16 in forward and backward directions, the slider 17 moves forward and backward, thereby moving the lens mount 18 through the link member 21 to the pivot pin 2 of the support 19.
The angle of the lens mount can be changed by rotating it around the clock. Therefore, the screw shaft 16 and the worm 2
By appropriately adjusting the rotation amount of 4, the surface of the lens mount can always be exposed to sunlight. Lens mount 1
8 has a large number of lenses 28 on its surface and a large number of solar cell elements 29 inside. The lens can be a Fresnel lens.

In the device of the present invention, the weight of the rotary table 14, which supports most of the mechanisms of the entire device, is transferred to the fixed table 11 through the wheels 15.
Since it is supported above, the rotary table 14 itself rotates easily, and the motor 22 and reducer 23 can be downsized. Further, since the rotary table 14, which supports most of the mechanisms of the entire apparatus, has a low center of gravity and is rotated in a horizontal plane on the fixed table 11, stable driving can be obtained. moreover,
Since the rotational moment due to gravity of the lens support frame 18 is always in one direction during solar tracking, accurate tracking can be performed without any disturbance in the control due to the reversal of the rotational moment as in the conventional case.

FIG. 4 shows a modification of the present invention, in which the rotary table 14 has a circular frame structure using a pipe-like member as shown.

By adopting such a frame structure, the weight of the rotary table 14 can be reduced.

As described above, according to the present invention, it is possible to obtain a solar tracking and condensing device that can reduce the weight of the entire device and has good tracking accuracy. In addition,
The present invention can be used not only for solar cell power generation devices but also for solar heat collectors.

[Brief explanation of the drawing]

Fig. 4 is a perspective view of a conventional device, Fig. 2 is a side view showing an example of the device of the present invention, Fig. 3 is a perspective view of the device of the present invention, and Fig. 4 is a perspective view showing a modification of the present invention. 0 11...Fixed base 14...Rotating base 16...
・Screw shaft 17...Scillator 18...' Lens mount 19...Strut 21...Link member
22, 26... Drive motor 23. 27... Transmission Patent applicant Sumitomo Electric Industries, Ltd. L7 Figure L3 Figure Li Figure 715

Claims (4)

[Claims] (1) A fixed base, a rotary base supported on the fixed base and capable of rotating a vertical shaft, and a screw shaft horizontally supported on the rotary base and rotatable around a central shaft; A slider screwed onto the screw shaft, a column erected on the rotary table, a link member whose one end is pivotally supported by the slider, and a link member whose one end is pivotally supported by the column, respectively, in an inclined arrangement. The solar tracking and condensing device includes a lens mount having a rotary structure, and the rotary table and screw shaft are rotationally driven by a drive motor installed on the rotary table via a transmission. (2) The device according to item 1, wherein the drive motor is a pulse motor or a DC motor. (3) The device according to item 1, wherein the rotary table comprises a circular frame having a disk or pipe structure. (4) The device according to item 1, wherein the lens on the lens mount is a 7-lens lens.