Clamping device for clamping a fastener

Patent metadata

Field	Value
Publication number	US-9555524-B2
Application number	US-201313932449-A
Country	US
Kind code	B2
Filing date	Jul 1, 2013
Priority date	Jul 2, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A clamping device for clamping a fastener, includes a clamping jaw, a first biasing member for biasing the clamping jaw, a clamping body having a central axis, a driving assembly for driving the clamping jaw to clamp the fastener, and a second member which can be driven by the first member to move axially relative to the clamping body so as to push the clamping jaw to clamp the fastener. The clamping body is formed with a notch for receiving the clamping jaw and the driving assembly is supported on the clamping body and includes a first member which can rotate and move axially relative to the clamping body. The installation structures between the clamping body, the driving assembly and the clamping jaw may be designed to be more compact so that the clamping device has a smaller size.

First claim

We claim:

1. A clamping device for clamping a fastener, comprising:
a clamping jaw;
a first biasing member for biasing the clamping jaw;
a clamping body having a central axis, the clamping body being formed with a notch for receiving the clamping jaw; and
a driving assembly for driving the clamping jaw to clamp the fastener, the driving assembly being supported on the clamping body,
wherein the driving assembly further comprises:
a first member which can rotate and move axially relative to the clamping body; and
a second member which can be driven by the first member to move axially, without rotating, relative to the clamping body so as to push the clamping jaw to clamp the fastener,
wherein the clamping body comprises a receiving portion for receiving the fastener and a supporting shaft, and the receiving portion is provided with a guiding groove, wherein the notch is formed on the receiving portion and communicated with the guiding groove, and an inner wall of the second member is provided with a pushing block for pushing the clamping jaw and mating with the guiding groove so as to guide the second member to move axially with respect to the clamping body.

2. The clamping device for clamping a fastener according to claim 1 , wherein the clamping jaw has an inner side wall and an outer side wall provided with an elongated groove, and an inclined guiding wall extends from the elongated groove, wherein the pushing block is formed with an inclined pushing plane mating with the guiding wall and having a width generally the same as that of the guiding wall and the elongated groove.

3. The clamping device for clamping a fastener according to claim 2 , wherein the inner side wall of the clamping jaw is provided with a V-shaped groove for mating with a head of the fastener, and the inner side wall further is further provided with a circular groove below the V-shaped groove for receiving one end of the first biasing member.

4. The clamping device for clamping a fastener according to claim 3 , wherein the supporting shaft comprises a first shaft portion having a hole for receiving the other end of the first biasing member, a second shaft portion on which the receiving portion of the clamping body is fixedly mounted and a third shaft portion provided with outer threads, and the inner wall of the first member is provided with inner threads for engaging with the outer threads.

5. The clamping device for clamping a fastener according to claim 4 , wherein the clamping device further comprises an auxiliary biasing member mounted between the clamping body and the second member.

6. The clamping device for clamping a fastener according to claim 1 , wherein the clamping device further comprises a quick-releasing mechanism having a clutch member which can be engaged with or disengaged from the driving assembly, when the quick-releasing mechanism is in an unreleased state, the clutch member is engaged with the driving assembly, and when the quick-releasing mechanism is in a released state, the clutch member is disengaged from the driving assembly.

7. The clamping device for clamping a fastener according to claim 6 , wherein the clutch member is mounted to the clamping body and comprises an outer side wall provided with outer threads and an inner side wall provided with a groove to form two legs, and the quick-releasing mechanism further comprises a quick-releasing shaft which is inserted into the clamping body and moveable relative to the clamping body, wherein the front end of the quick-releasing shaft is provided with two concave portions having relatively small diameters and mating with the two legs of the clutch member, and a convex portion is arranged between the two concave portions.

8. The clamping device for clamping a fastener according to claim 7 , wherein the quick-releasing mechanism further comprises a second biasing member for biasing the quick-releasing shaft.

9. The clamping device for clamping a fastener according to claim 8 , wherein the rear end of the quick-releasing shaft has a quick-releasing button to be pressed by a user.

10. The clamping device for clamping a fastener according to claim 1 , wherein the clamping body has a first retaining member, and the driving assembly has a second retaining member for mating with the first retaining member to retain the clamping device in a predetermined clamped state.

11. The clamping device for clamping a fastener according to claim 10 , wherein one of the first retaining member and the second retaining member is a projection protruding towards the central axis of the clamping body, and the other one is a first groove extending in the longitudinal direction.

12. The clamping device for clamping a fastener according to claim 11 , wherein the driving assembly further comprises a third member arranged between the first member and the second member, and a third retaining member and a fourth retaining member which are cooperated with each other for better retaining the clamping device in the predetermined clamped state.

13. The clamping device for clamping a fastener according to claim 12 , wherein one of the third retaining member and the fourth retaining member is a pin mounted to the second member or the third member by an elastic member, and the other one is a second groove for receiving one end of the pin, wherein the second groove has a straight plane and an inclined plane opposite to each other.

14. A clamping device for clamping a fastener, comprising:
a clamping jaw;
a first biasing member for biasing the clamping jaw;
a clamping body having a central axis, the clamping body being formed with a notch for receiving the clamping jaw; and
a driving assembly for driving the clamping jaw to clamp the fastener, the driving assembly being supported on the clamping body,
wherein the driving assembly further comprises:
a first member which can rotate and move axially relative to the clamping body; and
a second member which can be driven by the first member to move axially, without rotating, relative to the clamping body so as to push the clamping jaw to clamp the fastener,
wherein the clamping body is provided with a guiding groove communicated with the notch, the second member is provided with a pushing block for pushing the clamping jaw and mating with the guiding groove so as to guide the second member to move axially with respect to the clamping body.

Assignees

• Chervon Hk Ltd

Inventors

• Chen Liang
• Ni Guigong

Classifications

• Y10T279/17701

  Threaded cam sleeve · CPC title

• Y10T279/17649

  Threaded sleeve and body · CPC title

• Y10T279/17411

  Spring biased jaws · CPC title

• B23B31/16158

  Jaws movement actuated by coaxial conical surfaces · CPC title

• B25B13/44 Primary

  of the chuck type · CPC title