Centering rapid clamping fixtureTechnical field
The present invention relates to a kind of rapid clamping fixture, especially a kind of centering eccentric rapid clamping press plate of adjustable thrust.
Background technology
When metal cutting process, after Workpiece fixing, fixed to clamp with pressing plate, then used workpiece processing tool.Conventional fixation clip comes in addition fastening, and service efficiency is not high, and after repeatedly using, the hex nut place in bolt can produce distortion, last rounded state, causes spanner skid and cannot be wrenched; And screw thread is repeatedly engaged down with the screw thread of hex nut, can cause thread abrasion and rotten tooth, cause and cannot lock, service life is short.Chinese utility model patent number: 201120103422.3, disclose a kind of eccentric rapid clamping press plate, one end of pressing plate has indent feed groove, pressing plate is equipped with connecting rod, the lower end of connecting rod is connected with T-nut, its upper end is connected with the woodruff key of a bias, and the lower end of woodruff key contacts with pressing plate and connects, and woodruff key has been threaded handle.Although this pressing plate can realize Quick holding part, solve the defect that conventional fixation clip exists, but this pressing plate carrys out compacting processing workpiece by the bias of woodruff key, compress necessary self-locking between later half round key and pressing plate, the clamping force of platen clamp workpiece and clamping displacement can only regulate by regulating connecting rod, extremely inconvenient, and, when clamping force is excessive, after woodruff key loosens, pressing plate cannot unclamp.In addition, the work pieces process that cannot be applicable to need centering to clamp and there is the workpiece of elastic deformation after compaction, the timely fine setting of thrust.Therefore, need one can be used for the clamping of workpiece centering, after compaction, thrust can regulate and automatically unclamp the rapid clamping fixture of pressing plate.
Summary of the invention
The present invention will provide a kind of centering rapid clamping fixture, finely tunes for the thrust after solving the clamping of workpiece centering, compressing and automatically unclamps the technical problem of pressing plate.
For achieving the above object, technical scheme of the present invention is: a kind of centering rapid clamping fixture, comprise pressing plate, connecting rod, eccentric half nahlock, be threaded connection between two connecting rods, middle formation lead, lead two ends cross-under one block pressur plate respectively of connecting rod, on connecting rod, bottom groove has long lumbar hole, by eccentric half nahlock of the removable connection of bearing pin in each long lumbar hole, on connecting rod, lower end is respectively equipped with adjusting bolt and locking nut, adjusting bolt bottom surface contacts with bearing pin and connects, the bevel washer be socketed on connecting rod is housed above every block pressur plate.
Back-moving spring is socketed with outside connecting rod between two block pressur plates.Eccentric half nahlock is provided with turning handle.When after clamping platen, eccentric half nahlock is connected with the Contact self-locking of bevel washer.
The invention has the beneficial effects as follows:
L (), when clamping, can pass through two bias half nahlock energy quick centring clamping work pieces, and utilize bevel washer to regulate centering position easily, the angle of friction of bevel washer and eccentric half nahlock contact position is locked, and in use, can not loosen workpiece;
(2) for there is the workpiece of elastic deformation after compaction, the thrust of eccentric half nahlock is finely tuned by adjusting bolt and locking nut;
(3) owing to being socketed with back-moving spring outside the connecting rod between two block pressur plates, after unclamping eccentric half nahlock, pressing plate is under action of reset spring, and automatic and workpiece unclamps.
Accompanying drawing explanation
Fig. 1 is structural upright schematic diagram of the present invention;
Fig. 2 is structural front view of the present invention;
Fig. 3 is the top view of Fig. 2;
Along B-B sectional view in Fig. 4 Fig. 3.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figures 1 to 4, a kind of centering rapid clamping fixture, comprises pressing plate 1, connecting rod 3, eccentric half nahlock 4, bevel washer 7, back-moving spring 6, bearing pin 8, turning handle 9, adjusting bolt 11, locking nut 12.
Be threaded connection between two connecting rods 3, middle formation lead, lead two ends cross-under one block pressur plate 1 respectively of connecting rod 3, connecting rod 3 upper and lower part groove has long lumbar hole, by bearing pin 8 removable connection bias half nahlock 4 in each long lumbar hole, connecting rod 3 upper and lower end is respectively equipped with adjusting bolt 11 and locking nut 12, and adjusting bolt 11 bottom surface contacts with bearing pin 8 and connects, and every block pressur plate 1 is equipped with the bevel washer 7 be socketed on connecting rod 3 above.
Back-moving spring 6 is socketed with outside connecting rod 3 between two block pressur plates 1.Eccentric half nahlock 4 is provided with turning handle 9.When after clamping platen 1, eccentric half nahlock 4 is connected with the Contact self-locking of bevel washer 7.
Use procedure of the present invention: when the material that a collection of gauge thickness of processing is identical, first the distance between two block pressur plates 1 of the present invention and workpiece 10 is carried out initial adjustment by two connecting rods 3, with the spacing of satisfied eccentric half nahlock 4, just the effect of stressed on friction can be played by the eccentric throw of eccentric half nahlock 4 like this.And when regulating centering position, as long as rotate bevel washer 7.After clamping force regulates, respectively turning handle 9 is down pressed, two block pressur plates 1 are under the effect of eccentric half nahlock 4, and self-locking compresses bevel washer 7 and pressing plate 1, meanwhile, and the also stressed compression of the workpiece 10 between two block pressur plates 1.After compression has the workpiece 10 of elastic deformation, during as needs fine setting thrust, finely tune the thrust of eccentric half nahlock 4 by adjusting bolt 11, finely tuned rear locking nut 12 and locked adjusting bolt 11.When completion of processing, up push-jump fixed handle 9, two block pressur plate 1 is under back-moving spring 6 acts on, and automatic and workpiece 10 unclamps, and can take workpiece 10 away.