JPH0222990Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tightening clamp for flat semiconductor devices. More specifically, a pedestal on which a flat semiconductor element is placed and a pair of stud bolts erected from this pedestal can be separated without being fixed by means such as brazing or welding as in the past. By replacing stud bolts with different lengths as necessary, the tightening clamp has versatility, and the quality of the fixing method, such as brazing or welding, between the pedestal and the stud bolt is improved. The present invention relates to a tightening clamp for flat semiconductor devices that avoids variations in width.

An example of a conventional tightening clamp of this type is shown in FIG.

In the figure, a pair of stud bolts 2, 2 are erected at both longitudinal ends of a pedestal 1 on which a flat semiconductor element is placed. That is, the ends of the stud bolts 2, 2 are inserted into through-holes or screw holes 3 provided in the pedestal, and both are bonded together by welding means 4, 4, such as silver brazing or welding, on the back side of the pedestal 1. It is fixed.

Screws 5, 5 are cut into the free ends of the stud bolts 2, 2 that are raised up on the pedestal 1, and after inserting the leaf spring 7 equipped with the alignment mechanism 6 into these free ends, nuts 8, 8 are inserted. By tightening, a pressing force is applied to the flat semiconductor element interposed between the heat dissipation fins.

In the above configuration, since the pedestal 1 and the stud bolts 2, 2 are fixed by silver brazing or welding means, the metal of the welded part is caused by the heat generated from the flat semiconductor element during operation of the device. When the structure is destroyed and the leaf spring 7 is tightened with the nut 8, the stud bolt 5 may come out of the pedestal 1 due to the tensile force in the axial direction. , 5 rotate.

Furthermore, since the pedestal and the stud bolt of a predetermined length are welded together, it is necessary to prepare individual tightening clamps depending on the thickness of the heat dissipation fin and the flat semiconductor element, which is not versatile. It was uneconomical.

This invention was made based on the above circumstances,
For flat semiconductor devices, the pedestal and stud bolt are separable, and when necessary, the stud bolt can be replaced with a different length to provide versatility, and the pedestal and stud bolt are securely fixed. The purpose is to provide a tightening clamp.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a first embodiment of the present invention, in which a pedestal 1
1 has through holes 12, 12 at both ends in the longitudinal direction,
Polygonal enlarged diameter portions 13, 13 for preventing rotation are formed on the surface side of the pedestal 11 in communication with the through holes 12, 12. The enlarged diameter portions 13, 13 may have any shape as long as they are concentric with the through holes 12, 12 and serve to prevent the stud bolts 14, 14 from rotating. This pedestal 1
Attach stud bolts 14, 14 to 1. That is, the stud bolts 14, 14 are provided with polygonal flanges 15, 15 at a certain distance from their ends, and these flanges 15, 15 are connected to the enlarged diameter portions 13, 13 of the pedestal 11. After fitting and inserting the threaded portions 16, 16 formed at the ends of the stud bolts 14, 14 into the through holes 12, 12, the washer 17 and Nut 19,1 via spring washer 18
By tightening the bolts 9, the stud bolts 14, 14 are made to stand up on the pedestal 11.

Threaded portions 20, 20 of predetermined dimensions are also provided at the other ends (free ends) of the stud bolts 14, 14, and after inserting the plate spring 22 equipped with the alignment mechanism 21, by tightening the nuts 23, 23, It is configured so that a pressing force is applied to a flat semiconductor element between heat dissipation fins (not shown). Note that the threaded portion 16
and 20 are threaded in opposite directions, so that the stud bolt 14 and the pedestal 11 can be more securely fastened together.

FIG. 3 shows a second embodiment of the present invention, in which an enlarged diameter portion 13 is formed from the back side of the pedestal 11, and
A stud bolt 14 with an annular positioning groove 26 formed at a position corresponding to the thickness of the polygon head 25 and the pedestal 11 is prepared, and after inserting the stud bolt 14 from the back side of the pedestal 11, the positioning groove 26 is inserted into the stud bolt 14. 2
A stop ring 27 is fitted into the stud 6, and a stud bolt 14 is made to stand up on the pedestal 11.

The enlarged diameter part 13 formed on the pedestal 11 and the collar part 15 or 25 provided on the stud bolt 14 fit into the enlarged diameter part 13, so that when tightening the nut 23 to the threaded part 20, the stud bolt 14 Since the holder does not rotate, assembly work can be done easily and reliably.

As is clear from the above explanation, according to the present invention, the pedestal and stud bolt are not fixed by means such as silver brazing or welding, but are fixed by fastening with screws or with a stop spring. Therefore, by replacing the stud bolts according to the thickness of the heat dissipation fins and the flat semiconductor element, a versatile tightening clamp for flat semiconductor elements can be obtained, which is highly economical. Furthermore, since there is no welded part between the pedestal and the stud bolt as in the conventional case, there is no fear of breakage or rotation due to deterioration of the welded part due to heat generation of the flat semiconductor element during operation of the device, and quality is stabilized.

[Brief explanation of the drawing]

FIG. 1 is a diagram of the components of a conventional clamp for flat semiconductor devices, FIG. 2 is a diagram of the components of the clamp for flat semiconductor devices of the present invention, and FIG. 3 is a diagram of the second embodiment of the present invention. FIG. 3 is a component diagram showing a portion of the clamp shown in FIG. 11... pedestal, 12... through hole, 13... enlarged diameter part, 14... stud bolt, 15... flange, 2
2...Plate spring, 26...Positioning groove, 27...Stop spring.

Claims (1)

[Scope of utility model registration request] A flat semiconductor device tightening clamp having a pedestal, a pair of stud bolts erected at both ends of the pedestal in the longitudinal direction, and a leaf spring inserted through the stud bolts, wherein the pedestal has the stud bolts. The stud bolt is formed by forming a through hole through which the stud bolt is inserted, and an enlarged diameter part that is concentric with the through hole and larger than the through hole, and a flange formed on the stud bolt corresponding to this enlarged diameter part fits. A tightening clamp for a flat semiconductor device, characterized in that it is provided with a bolt rotation prevention device, and the pedestal and stud bolt can be separated from each other without being fixed together.