Expander

Abstract

A clamping device includes: an upper pressure seat having an inner inclined surface and an outer inclined surface opposite to the inner inclined surface, the inner inclined surface surrounding a first through hole; a gasket accommodated in the first through hole; a lower pressure seat having a through second through hole; a sleeve having an outer wall surface and an inner wall surface opposite to each other, the inner wall surface surrounding a receiving space for accommodating the upper pressure seat, the screw, and the lower pressure seat, the sleeve further having an annular flange extending from the outer wall surface and a plurality of elongated grooves annularly disposed on the outer wall surface, the equal-length grooves communicating with the receiving space, the outer diameter of the annular flange being larger than the outer diameter of the sleeve; and a screw passing through the first through hole, the receiving space, and the second through hole to screw the upper pressure seat, the lower pressure seat, and the sleeve.

Claims

1. A clamping device, comprising: an upper pressure seat having an inner inclined surface surrounding a first through hole; a gasket accommodated in the first through hole; a lower pressure seat having a through second through hole; a sleeve having an outer wall surface and an inner wall surface opposite to each other, the inner wall surface surrounding a receiving space, the inner wall surface having two inner conical segments facing opposite directions and a connecting segment connecting the two inner conical segments; the axial lengths of the upper pressure seat and the lower pressure seat respectively match the axial lengths of the two inner conical segments, such that... The upper pressure seat and the lower pressure seat are initially fully accommodated within the accommodating space; the sleeve also has an annular flange extending from the outer wall surface and a plurality of long grooves circumferentially disposed on the outer wall surface, the equal-length grooves communicating with the accommodating space, and the equal-length grooves corresponding to the positions of the two inner conical sections in the axial range but not completely penetrating the connecting section; the outer diameter of the annular flange is larger than the outer diameter of the sleeve; and a screw, the screw passing through the first through hole, the accommodating space and the second through hole, screwing the upper pressure seat, the lower pressure seat and the sleeve.

2. The clamping device as described in claim 1, wherein, The connecting segment has an extended hypothetical extension line, the angle between the hypothetical extension line and the two inner conical segments being 5 to 40 degrees, preferably 15 degrees.

3. The clamping device as described in claim 2, wherein, The equal-length grooves extend along the direction of the outer wall surface, with some of the grooves penetrating the sleeve, making the equal-length grooves partially open and spaced apart.

4. The clamping device as described in claim 2, wherein, The equal-length groove extends in the opposite direction to the outer wall surface and penetrates the sleeve, making the equal-length groove open.

5. The clamping device as described in claim 2, wherein, The equal-length groove is divided into a plurality of first long grooves and a plurality of second long grooves, and each of the first long grooves and each of the second long grooves is located on the same axis in pairs.

6. The clamping device as described in claim 2, wherein, The equal-length slot is divided into a plurality of first long slots and a plurality of second long slots, with each of the first long slots and each of the second long slots arranged in a staggered manner.

7. The clamping device as described in claim 5 or 6, wherein, The sleeve also has a slit groove, which is equidistant from the equal-length groove.

8. The clamping device as described in claim 5 or 6, wherein, The outer wall of the sleeve has two outer conical sections facing opposite directions and a connecting section connecting one of the two outer conical sections, the two outer conical sections and the connecting section extending in different directions.

9. The clamping device as described in claim 5 or 6, wherein, The outer wall of the sleeve is curved.

10. The clamping device as described in claim 5 or 6, wherein, The second long grooves extend in the opposite direction to the annular flange, and a portion of the second long grooves penetrate the sleeve; the first long grooves extend in the direction of the annular flange and penetrate the annular flange.

11. The clamping device as described in claim 5 or 6, wherein, The second long grooves extend in the opposite direction to the annular flange, wherein the second long grooves penetrate the sleeve; the first long grooves extend in the direction of the annular flange, wherein the first long grooves penetrate the annular flange.

12. The clamping device as described in claim 5 or 6, wherein, The second long grooves extend in the opposite direction to the annular flange, and a portion of the second long grooves penetrate the sleeve; the first long grooves extend in the direction of the annular flange, and a portion of the first long grooves penetrate the annular flange.

13. The clamping device as described in claim 5 or 6, wherein, The second long grooves extend in the opposite direction to the annular flange, wherein the second long grooves penetrate the sleeve; the first long grooves extend in the direction of the annular flange, wherein a portion of the first long grooves penetrates the annular flange.

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