CN2184525Y - General adjustable clippers - Google Patents

Abstract

The utility model relates to a pair of general adjustable clippers for cutting wires, which can be utilized repeatedly through adjustment after abrasion and failure and can be arranged on pneumatic tools with different types and sizes, and the utility model is a tool used for trimming the leading wires of electronic components at the back side of a printed circuit board. The structure and the size of the clippers are formed via combining the action size and the functional structure of different pneumatic tools of the existing clippers. Two clipper bodies (1) and (2) are connected by an adjustable mechanism composed of an adjustable shaft (3) and a locking member (4). After the clippers is abraded and is failed, the axial clearance can be adjusted via a screwdriver, and the clippers for cutting wires can be utilized again until cutting edges are abraded and discarded.

Description

General adjustable clippers

Use on a kind of pneumatic tools that can be loaded on dissimilar and physical dimension, again can be at wear out failure after to adjust be reusable novel " universal adjustable wire nipper ".Be used to prune the instrument of the printed wiring board back side electronic component down-lead after plug-in unit welds.

Wire nipper is to cooperate special-purpose pneumatic tools to use, because the physical dimension difference of pneumatic tools, the physical dimension that causes wire nipper is different and can not exchange use, gives to produce and use producer to bring a lot of difficulties.

Old-fashioned cutting nippers sunk head rivet axle contacts the conical surface and moving with moving pincers with moving caliper, wearing and tearing between the fixed clamp contact plane, make the gap increase the cutting edge dislocation, it is the main cause that shear fails is scrapped, Chinese patent 89205347.X and 91220468.0 has structurally proposed improvement project, and obtained effect, but only being suitable for the thicker a kind of wire nipper of caliper adopts, thinner for the caliper size, " adjustable shaft " connects even adopt the closely-pitched spiral to pay with " fixed clamp ": its screwing length still is not more than 4 teeth, this is to the caliper rigidity, linking intensity, comprehensive shearing force bring certain influence service life.

The purpose of this utility model is to provide a kind of can preventing to misfit the whole wire nipper that causes and scrap owing to rotating shaft wearing and tearing back cutting edge, can be loaded on novel " the universal adjustable wire nipper " that use on the different pneumatic tools again.

The purpose of this utility model is achieved in that the structure and the size of existing pneumatic tools of analysis-by-synthesis consideration and wire nipper, under the principle that guarantees mechanism and function, determine the shape and size of new caliper, emphasis is considered the shape and size of the stressed R of place of moving caliper afterbody, the fixed clamp installing hole to rotating shaft apart from size and tail shape, to guarantee exchange performance to all kinds of pneumatic tools.The adjustable pivot structure that replaces the rotating shaft of original sunk head rivet formula---with sunk screw formula or button-headed screw formula adjustable shaft, be loaded in the moving caliper and spin with screw in the fixed clamp, be locked on the fixed clamp with button-headed screw or grooved round nut, after adjustable shaft and moving caliper contact-making surface or moving, fixed clamp contact plane wearing and tearing, available common in-line bottle opener is readjusted gap, the wire nipper of axle and can be reused, and damages until cutting edge and scraps.

Structure of the present utility model is to take all factors into consideration design according to the structure function and the installation requirement of different wire nippers and different pneumatic tools with size, so versatility is good, can be installed on the various pneumatic tools and uses; Because original sunk head rivet formula fixed rotating shaft is changed into the adjustable shaft that is assembled into two parts, assembly process process is good simultaneously, and specification requirement is low, guarantees easily and stabilized product quality, and the function of adjusting the between centers crack is arranged, so one can be at most use wire nipper; In addition, because size and dimension of the present utility model is comprehensive redesign, locking member---button-headed screw or grooved round nut expose fixed clamp in permission, undercut size and dimension on the button-headed screw all is special, can allow adjustable shaft enter, the ridge number that is combined in the fixed clamp is increased, generally all be no less than 8 teeth, improve so precision is adjusted in the connection rigidity of adjustable shaft, intensity and assembling, shearing force increases and prolongs service life.Especially since the tooth of the locking screw on adjusting screw thread and the locking member on the adjustable shaft apart from identical rotation direction opposite (about revolve), so when loosening at work, have the self-tightening regulatory function.

The utility model concrete structure is provided by following examples and accompanying drawing.Fig. 1 is a universal adjustable wire nipper structure, and the adjustable pivot structure that fixed clamp (2) moving caliper (1) adjustable shaft (3) and locking member (4) are formed connects, and return was used when stage clip (5) was worked for caliper.Fig. 2 is the old-fashioned structure that connects with sunk head rivet axle B, the clearance C that the wearing and tearing back occurs between caliper and the rivet shaft B, and it makes the dislocation of two caliper cutting edges and inefficacy is scrapped, and can not repair." adjustable wire nipper " then available common in-line bottle opener is adjusted adjustable shaft (3) and is eliminated wearing clearance, and wire nipper can be reused, till cutting edge damages.According to the condition of manufacturer, 3 to Fig. 8 six kinds of adjustable pivot structures of launch plan in same inventive concept and structural principle all are to adopt to revolve to pay to adjust and application of force locking.Wherein Fig. 3 to Fig. 5 is a screw lock, and Fig. 6 to Fig. 8 is nut check.

Concrete condition below in conjunction with six kinds of structures of picture specification.

Fig. 3 is the adjustable pivot structure of screw lock: adjustable shaft (3) adopts 90 ° of sunk screw structures, and the lower end external screw thread is the dextrorotation closely-pitched, screws in the screw of fixed clamp (2), in order to adjust the gap that forms owing to axial wearing and tearing; The 90 ° of cones in upper end become H8/h8 to cooperate with mediate cylindrical with the interior profile of moving caliper (1), be moving caliper (1) centre of gyration.Locking member (4) is left-handed button-headed screw structure, screw in the inner bolt hole of adjustable shaft (3), in order to connect firmly with fixed clamp (2) locking, its undercut size and dimension all is specific, can allow adjustable shaft (3) enter, the ridge number that is combined on the fixed clamp (2) is increased, generally be no less than 8 teeth, be respectively dextrorotation and left-handed because the spiral of adjustable shaft (3) and locking member (4) is paid.And tooth is apart from identical, therefore when adjustable shaft (3) self is loosening, locking member (4) but auto lock forms a kind of self-locking mechanism.

Fig. 4 and Fig. 3 difference are: 60 ° of cones are adopted in adjustable shaft (3) upper end, cooperate with moving caliper (1) female cone body, are the moving caliper centre of gyration.Be characterized in that contact-making surface is big, stability height, and the moulding of available standards centre drill time processing, good manufacturability, production efficiency height.

Fig. 5 and Fig. 3 difference are: adjustable shaft (3) adopts the button-headed screw structure, and the upper end is that cylinder becomes H7/h7 to cooperate with moving caliper (1) endoporus, is the moving caliper centre of gyration.Be characterized in becoming conical surface wearing and tearing and be surface wear, easy to processly be easy to guarantee quality of fit.

Fig. 6-Fig. 8 and Fig. 3-Fig. 5 difference is: adjustable shaft (3) lower end threaded portion all exposes fixed clamp (2) plane 5～6 teeth, uses locking member---and the locking of GB817-76 grooved round nut is locking.Be characterized in easy to process, adopt commercially available standardized element, so the good manufacturability cost is low.

Claims (4)

1, uses on a kind of pneumatic tools that can be contained in dissimilar and structure, again can be at wear out failure after adjustment is " the universal adjustable cutting nippers " of reusable pruning printed substrate back side electronic component down-lead, the planform of two calipers and installation dimension are that the effect size and the functional structure of comprehensive different " wire nipper " and " pneumatic tools " determined, the connection that it is characterized in that two calipers (1), (2) is with adjustable shaft (3) and locking member (4) adjustable mechanism composition and that the auto lock function is arranged.

2, according to the described wire nipper of claim 1, the spiral that it is characterized in that adjustable shaft (3) and locking member (4) is paid and is respectively dextrorotation and left-handed, but tooth is apart from identical.

3,, it is characterized in that adjustable shaft (3) and its head of locking member (4) can expose caliper according to the described wire nipper of claim 1.

4, according to claim 1,2,3 described wire nippers, it is characterized in that the version of locking member (4), can make screw-type or nut type.