CN2095071U - Roller trigger - Google Patents

Abstract

The utility model discloses a roller trigger among box spanner, it utilizes the freewheel separation and reunion principle to constitute, simple structure, and processing performance is good, and it is noiseless to save labour to economize material, reduces manufacturing cost in a large number, stable performance, and easy operation is reliable.

Description

Roller spanner holder

The utility model belongs to manual device handle.

At present in mechanical engineering, widely apply fastening, the connection of securing member, more convenient common use box spanner, box spanner mainly is made up of sleeve and trigger piece, how tame instrument manufacturer production is arranged in the market, this trigger piece is to utilize ratchet, the principle of ratchet constitutes, promptly shown in figure one, form with trigger piece core 3 by handle 1, trigger piece head 2, be processed with ring gear (ratchet) at the medial surface of trigger piece head 2 and in trigger piece core 3, be embedded with a ratchet and spring, the tooth on the ratchet is cooperated with gear ring on the trigger piece head 2, reach the trigger piece function.During use, clockwise direction is pulled trigger piece, ratchet and gear ring interlock, and power promptly is delivered on the sleeve, makes screw tightening, if counter-clockwise direction is pulled trigger piece, then ratchet is jumped tooth on gear ring, the power transmission is less than on the sleeve.When forwarding about 20 ° to, can pull clockwise again, as tightening filament than past reactivation, the trigger piece complex manufacturing of this ratchet-type, operation is many, man-hour is long, material unaccounted-for (MUF) is many, manufacturing cost is high, wherein ratchet because complex-shaped, intensity is lower, be easy to damage and gear ring is subjected to the restriction of the number of teeth and free parallactic angle is arranged, causing lost efficacy sometimes and be difficult to uses in narrower space.

The purpose of this utility model is the reliability of reforming structure, simplification technology, improving the quality, reduce cost, guarantee trigger piece work.

The utility model is to adopt the overdrive clutch principle, changes the metal stress, by being subjected to shearing force to make extruding force into, thereby allow to transmit bigger moment of torsion, and reliable operation, the operating space is little.The trigger piece of pressing the utility model manufacturing is shown in figure one, and the medial surface of plate button 2 is level and smooth faces of cylinder, only needs common metalworking to get final product.Trigger piece core 3, except that 3 interstitial holes with various sleeves cooperate, lateral surface also is the level and smooth face of cylinder, just need cut one jiao, for embedding roller 4 and support spring 5, spring 5 is that supporting roller 4 leans against between trigger piece head 2 and the trigger piece core 3 it all the time, shown in figure two, one side angle α's is the tangent line of the contact point of roller 4 and trigger piece head 2, another side is to cut one jiao limit on the trigger piece core 3, the α angle needs between 5 ° to 8 °, ° is the best with α=7.

When operation, trigger piece rotates to clockwise direction, and trigger piece head 2 drives rollers 4 clockwise directions and rotates, and this moment, roller 4 just pressed together the three to reach the effect of transmission moment to make screw tightening near trigger piece core 3 in the effect of power.Otherwise, when counterclockwise rotating, roller 4 also counterclockwise rotates, this moment roller 4 automatically and trigger piece core 3 unclamp, so reciprocal rotation reaches the function of tighten the screws, owing to adopt the overdrive clutch principle, so the angle, room almost is zero degree, even also can reach functional requirement to the space of trigger piece operation is very little like this.Such trigger piece function be with common trigger piece function be the same folk prescription to what use, promptly be positive for tightening usefulness, reverse side is to unclamp usefulness.The Roller spanner holder serviceability is reliable and stable, and noiseless deducts the metalworking of large amount of complex in the production, reduces operation, saves man-hour, improves stock utilization, and roller is a standard component, and bigger thus reduces production costs.

The utility model is further developed, and promptly roller of increase and changement can reach two-way use on above-mentioned Roller spanner holder, promptly call two-way Roller spanner holder.

Accompanying drawing one: Roller spanner holder principle schematic.

Accompanying drawing two: the α angle diagrammatic sketch that 3 excisions of trigger piece core are a jiao.

Press its profile of Roller spanner holder of figure one, size is with trigger piece is the same usually.The diameter of its trigger piece core 3 is 45 millimeters, and interstitial hole is to cooperate by sleeve, and the diameter of roller 4 adopts 9 millimeters.The α angle of excising one jiao is 7 degree, and one side of noting α angle trigger piece core 3 is wanted deep 0.5 millimeter adding man-hour, can make roller 4 in the crack movable leeway be arranged during this time like this.One end of spring 5 is to be fixed on the facet of one jiao of excision of trigger piece core 3, and end is a supporting roller 4 in addition.Spring is a stage clip, and elastic force is unsuitable excessive.Both ends of the surface at trigger piece head 2 and trigger piece core 3 have two cover plates, with fixedly trigger piece core 3, roller 4, spring 5 in trigger piece head 2, cover plate is to make with 2 millimeters steel plates, be fixed on the trigger piece core 3 with screw.Such one is easy to use, flexible, reliable Roller spanner holder, is desirable hand-operated tools.

Claims (1)

1. A kind of trigger piece of box spanner commonly used, its mainly contain trigger piece 1, trigger piece head 2 and trigger piece core 3, the lateral surface that it is characterized in that trigger piece head 2 medial surfaces and trigger piece core 3 is that the face of cylinder and centre thereof are embedded with roller 4 and support spring 5 compositions entirely.