Expander device having a positioning function

Abstract

A positioning clamping device is installed on a fork tube and includes: a gasket; an upper pressure block for accommodating the gasket; a screw between the gasket and the upper pressure block; a lower pressure block having an outer conical surface and an inner conical surface, the inner conical surface having a threaded structure that mates with the screw, and the outer conical surface having a recessed engagement hole for a pull-out member to be detachably inserted; and a clamping member having an outer ring surface, an inner ring surface, and a groove, the groove penetrating the outer ring surface and the inner ring surface, the pull-out member being engaged with the groove, the inner ring surface having a plurality of alternating concave and convex portions, and the outer ring surface having a plurality of spaced-apart convex portions, the convex and convex portions being alternating.

Claims

1. A positioning clamping device, mounted on a fork tube, comprising: a washer; an upper pressure block having an inner inclined surface surrounding a first through hole for accommodating the washer; a screw, the washer being located between the screw and the upper pressure block; and a lower pressure block having an outer conical surface and an inner conical surface oppositely disposed thereon, the inner conical surface having a threaded structure cooperating with the screw for threading through the screw. The lock has an outer conical surface with a recessed engagement hole for a puller to detachably pass through; and a clamping member having an outer annular surface, an inner annular surface opposite to the outer annular surface, and a groove penetrating the outer and inner annular surfaces, the puller being engaged with the groove. The inner annular surface has a plurality of alternating recesses and a plurality of alternating convexes, and the outer annular surface has a plurality of spaced-apart concave portions, the concave portions and the concave portions being alternating. It further includes an elastic member having a first end face and a second end face disposed opposite to each other. The first end face abuts against the upper pressure block, and the second end face abuts against the lower pressure block. The elastic member is pressed by the upper pressure block and the lower pressure block to make the elastic member fit tightly against the concave portion and the convex portion.

2. The clamping device with positioning function as described in claim 1, wherein, The elastic element is made of soft plastic, rubber or silicone material.

3. The clamping device with positioning function as described in claim 1, wherein, The inner ring surface has two inner conical sections facing opposite directions and a connecting section connecting one of the two inner conical sections. The two inner conical sections are respectively provided for the upper pressure block and the lower pressure block to abut against each other. The connecting section is provided for the elastic member and part of the upper pressure block and part of the lower pressure block to abut against each other.

4. The clamping device with positioning function as described in claim 1, wherein, The clamping member also has a plurality of elongated grooves, which penetrate the outer annular surface and the inner annular surface, and are disposed in the outer recesses.

5. The clamping device with positioning function as described in claim 1, wherein, The upper pressure block has an outer inclined surface opposite to the inner inclined surface, and one end of the upper pressure block has a lip, which surrounds the outer inclined surface to form a groove.

6. The clamping device with positioning function as described in claim 1, wherein, The concave portions and the convex portions are arranged radially along the inner annular surface.

7. The clamping device with positioning function as described in claim 1, wherein, The bottom of each concave portion is selected from one of a group consisting of an arc surface, a plane, an equal angle, or a chamfered angle, or any combination thereof.

8. A clamping device with positioning function as described in claim 1, wherein, Each of the recesses has a concavity degree, and the number of the recesses and the concavity degree are proportional to the thickness of the clamping member.

9. A clamping device with a positioning function as described in claim 8, wherein, The concavity is between 1 / 2 and 1 / 3 of the thickness of the clamping member, preferably 1 / 2.

10. A clamping device with a positioning function as described in claim 1, wherein, These recesses extend to half of the inner annular surface.

11. A clamping device with a positioning function as described in claim 1, wherein, The connecting hole has a depth for accommodating part or all of the puller.

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