CN2559453Y

CN2559453Y - Mechanical torque spanner

Info

Publication number: CN2559453Y
Application number: CN 02282383
Authority: CN
Inventors: 耿建生; 吴立群; 唐晓明; 邹颖
Original assignee: 耿建生
Priority date: 2002-10-29
Filing date: 2002-10-29
Publication date: 2003-07-09
Anticipated expiration: 2012-10-29

Abstract

A mechanical torque spanner comprises a circular handle. Wherein, an inner wall of the circular handle is tapered to form a tapered surface handle and is spliced with a single-sided cone. Taper of an external tapered surface of the single-sided cone is identical with that of the inner wall of the tapered surface handle. A bottom circle of the single-sided cone is provided with two horizontal convex parts at least. A ring spanner is positioned in a lower part of a lock nut. A middle part of the lock nut is engaged with the horizontal convex part of the single-sided cone. An upper part of the lock nut is embedded into an adjusting spring and threaded with an adjusting bolt. Tapered surface contact between the tapered surface handle and the single-sided cone provides a resistance moment based on friction principle to screw the adjusting bolt, realize deformation of the adjusting spring, set friction between the tapered surface handle and the single-sided cone and obtain a maximum working torque. The torque spanner has the advantages of fastener protection, stable performance, 2-year service life, lower cost, great portability, simple structure and high efficiency and adapts to steel tube fastener scaffold mounting and other mechanical mounting.

Description

The mechanical type torque wrench

Technical field

The utility model relates to a kind of millwright tool.

Background technology

Existing building is forging and pressing leatherhead double offset ring spanners with steel tube fastener scaffold spanner, and its structure is: it is pullover to be fixed with plum blossom in handle one or both ends portion.Existing problems mainly are: when fastening bolt, operating personnel are with sensation and experiential operating, and fastening force is too small, does not often satisfy the locking requirement of fastener screw, very easily stay hidden danger for keeping the safety in production, and cause the integral body of scaffold to stride and collapse; If fastening force is excessive, the destruction of then causing fastener.

Technology contents

The utility model will solve operating personnel with sensation and experience clamp nut, makes fastening pine or the tension crossed of screw, the technical problem that stays potential safety hazard or cause fastener to destroy.

The technical scheme of the utility model mechanical type torque wrench: be round in handle end, it is characterized in that: the circle inwall is the conical surface, constitute conical surface handle, conical surface handle circle inwall is with the single face cone, and the tapering of single face cone male cone (strobilus masculinus) is consistent with conical surface handle circle inwall tapering, and the single face cone has at least two lateral projection on the circumference of bottom, the stop-nut bottom is that plum blossom is pullover, the lateral projection interlock of middle part and single face cone, the adjustment spring is inserted on top, and is connected with the adjustment nut thread.

It is pullover that the above-mentioned handle other end also is fixed with plum blossom.

Above-mentioned adjustment spring is the short spring of reed or spiral.

The tapering of above-mentioned single face cone and cone handle is the 5-25 degree.

Circumferential center of circle direction is evenly distributed with three lateral projection to above-mentioned single face cone in the bottom.

This mechanical type torque wrench utilizes tribology principle to develop.Moment of friction is to be provided by the contact of the conical surface between conical surface handle 1 and the single face cone 2.Nut 5 is adjusted in turn, apply longitudinal pressure and give adjustment spring 3, make its transversely deforming, adjust spring 3 and promptly the conical surface of single face cone 2 is applied transverse pressure, single face cone 2 contacts with conical surface handle 1 conical surface, immediately this transverse pressure is passed to conical surface handle 1, so just set the friction between single face cone 2 and the conical surface handle 1, promptly set operation torque.

During spanner work, the operator applies a moment of face to conical surface handle 1, the conical surface between conical surface handle 1 and the single face cone 2 provides a rub-moment, when rub-moment during greater than moment of face, conical surface handle 1 is relative static with single face cone 2, simultaneously single face cone 2 passes to stop-nut 4 to this moment of face, and stop-nut 4 passes to moment of face again and adjusts nut 5, and the adjustment nut is screwed.When the adjustment nut constantly screws, require this moment of face constantly to increase, be that the operator will constantly increase the pressure to conical surface handle 1, thereby increase moment of face, when this moment of face equals rub-moment that conical surface handle 1 and single face cone 2 provided, spanner is in critical excitation, promptly reached the maximum working torque that can transmit, adjust nut 5 and reached " the tightest state " (with respect to this spanner), when moment of face continues to increase, big moment is when friction, single face cone 2 can not pass to moment of face stop-nut 4, also just again turn adjust nut 5, single face cone 2 will be slided with respect to conical surface handle 1 simultaneously, adjust nut and be operated in the standard torque scope.

Beneficial effect: mechanical type torque wrench of the present utility model, requirement according to People's Republic of China's industry standard " construction fastener type steel pipe scaffold technical specification of security " JGJI30-2001 J84-2001: " fastening bolt is tightened the torsional moment value should not be less than 40NM, and should not greater than 65NM ".This spanner moment of torsion is adjustable in the 40Nm-65Nm scope, and torque precision 4% is tightened at bolt and to be skidded automatically when torsional moment reaches 50NM, meets international standard, increases work efficiency, and guarantees fastening quality, and the protection fastener is not damaged; Simple in structure, easy to use, stable performance, cost is lower, is easy to carry, and the life-span can reach 2 years, satisfies the requirement that building trade steel tube fastener scaffold safety is set up.

This mechanical type torque wrench assembling process: elder generation packs single face cone 2 in the conical surface handle 1, then the stop-nut 4 single face cone 2 of packing into, put into and adjust spring 3, fixedly stop-nut 4 and conical surface handle 1, screw then and adjust nut 5, make effectively contact between conical surface handle 1 and the single face cone 2, reach setting moment.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the front view of conical surface handle;

Fig. 3 is the assembling schematic diagram of single face cone, conical surface handle and stop-nut;

Fig. 4 is the vertical view of single face cone;

Fig. 5 is the side view of single face cone;

Fig. 6 is the front view of stop-nut;

Fig. 7 is the vertical view of Fig. 5.

Among the figure: 1-conical surface handle, 2-single face cone, 3-adjust that spring, 4-stop-nut, 5-adjust that nut, 6-plum blossom are pullover, 7-lateral projection, 8-arc-shaped slot.

The specific embodiment

Embodiment is shown in Fig. 1-6: this mechanical type torque wrench is round in handle end, its circle inwall is the conical surface, constitute conical surface handle 1, conical surface handle circle inwall is with single face cone 2, the tapering of single face cone male cone (strobilus masculinus) and conical surface handle circle inwall tapering are 10 degree or 15 degree, the single face cone has three lateral projection 7 on the circumference of bottom, stop-nut 4 bottoms are plum blossoms pullover 6, there is the lateral projection interlock of three arc-shaped slots 8 and single face cone at the middle part, top is inserted in and is adjusted spring 3, and is threaded with adjustment nut 5.

The utility model both can be that double end also can be a single head, and wherein one can be that common plum blossom is pullover.

Basic parameter is as follows: 1, form: monoblock type; 2, overall dimensions: 330 * 60 * 90mm; 3, weight: 0.8Kg; 4, range: 0-75Nm; 5, driving end size: 22mm is quincunx; 6, the maximum effectively arm of force: 200mm; 7, current moment setting value: 50Nm.

Claims

1, a kind of mechanical type torque wrench, be round in handle end, it is characterized in that: the circle inwall is the conical surface, constitutes conical surface handle, and conical surface handle circle inwall is with the single face cone, the tapering of single face cone male cone (strobilus masculinus) is consistent with conical surface handle circle inwall tapering, the single face cone has at least two lateral projection on the circumference of bottom, the stop-nut bottom is that plum blossom is pullover, the lateral projection interlock of middle part and single face cone, the adjustment spring is inserted on top, and is connected with the adjustment nut thread.

2, mechanical type torque wrench according to claim 1 is characterized in that: it is pullover that the described handle other end also is fixed with plum blossom.

3, mechanical type torque wrench according to claim 1 is characterized in that: described adjustment spring is the short spring of reed or spiral.

4, mechanical type torque wrench according to claim 1 is characterized in that: the tapering of described single face cone and cone handle is the 5-25 degree.

5, mechanical type torque wrench according to claim 1 is characterized in that: circumferential center of circle direction is evenly distributed with three lateral projection to described single face cone in the bottom.