CN2228656Y

CN2228656Y - Torque wrench testing instrument with self-check function

Info

Publication number: CN2228656Y
Application number: CN 94200558
Authority: CN
Inventors: 邓士达; 倪琴芳
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 1994-01-10
Filing date: 1994-01-10
Publication date: 1996-06-05
Anticipated expiration: 2004-01-10

Abstract

The utility model relates to a torque wrench testing instrument with a self-check function, which is composed of a measuring display part, a supporting force adding mechanism and a self-check component device, wherein, the measuring display part comprises an indicating instrument 14, a sensor 2 and a bidirectional change-over connection 1, the supporting force adding mechanism comprises a guideway 8, a sliding base 6, a supporting frame 11, a rolling wheel 5 and a force adding rod 7, and the self-check component device comprises a cross beam, a serving tray, counterweights and a bracket plant.

Description

The torque spanner calibrating instrument that has self-checking function

The utility model relates to detection or the calibration that is used to measure torque spanner.

Torque spanner is the calibrating automobile, aircraft, one of mechanics metering project of machinery industry metrological service, when adopting various torque spanner operation, in order to guarantee the mechanical fastener assembly quality, just must detect or verification torque spanner self precision termly, this verification work be in the past adopt both heavy original, out of true again, unsafe extension counterweight and torque spanner be the mode of inspection mutually, the Chinese patent 87208350 that has now occurred, name is called the torque spanner tester, mainly comprise three parts: the one, support afterburning part, by monitor station, guide rail, bearing and being contained in is used for afterburning eccentric wheel and forms on the bearing; The 2nd, measure the display part, to form by digital indicator, torque sensor, torque sensor is provided with ratchet and pawl arrangement, so that select suitable afterburning position when detecting torque spanner; The 3rd, the self-correcting part is made up of crossbeam, counterweight, pallet.Though this tester is simple in structure, and is easy to operate, can self check, there are the following problems: 1, since supporting member fix, so error is arranged when detecting the spanner that homemade, various kind model specifications of import, thickness do not wait; 2, owing to adopt the eccentric wheel reinforcing, examine and determine to torque value so can only carry out folk prescription, and the friction that contacts with spanner is big to spanner; 3, owing to adopt click one-directional rotation mechanism, during the calibrating spanner, if once can not put in place, need repeatedly take off spanner and adjust the position, labour intensity is big; 4, during self check because crossbeam and pallet on hanging over crossbeam adopt is to contact, so use the contact of back point contact becoming face for a long time, make instrument self produce the measuring basis error.

The purpose of this utility model is: the problem at Chinese patent 87208350 exists, a kind of torque spanner tester simple in structure, easy to operate, accurate is provided, and it not only can the verification torque spanner, and instrument itself can self check.

The utility model by fuselage, be arranged in indicating instrument on the fuselage, board plug type base, sensor, two-way adapter, the guide rail that has ladder-type trough, glide base, guide pole, leading screw lifting support, roller, boosting-rod, self-correcting part device etc. and form, the board plug type base is to be welded in admittedly on the fuselage table top, sensor is inserted in the board plug type base, two-way adapter links to each other with the sensor upper end by square joint, and lead joins sensor and indicating instrument; The guide rail that has ladder-type trough is the opposite side that is fastened on the fuselage table top, glide base is contained on the ladder-type trough, have two unthreaded holes and a blind hole on the glide base, the lifting support that guide pole, screw mandrel is housed respectively and has a ladder-type trough links to each other, side at glide base also is furnished with locating slot, roller is installed on the lifting support by the ladder type screw, and boosting-rod is again to be contained on the roller; Self-correcting part device is the pallet that links to each other with crossbeam by crossbeam, by bracketplant, the counterweight that is placed on the pallet is formed, and bracketplant is made up of by the knife of △ the bracketplant frame that has elongated slot, half garden edge bearing, xsect, the crossbeam termination has dovetail groove, match with △ knife base, on the outer garden arc of edge bearing and straight flange, be provided with groove, match with bracketplant frame and △ knife top respectively.

Effect of the present utility model is:

1, because lifting support can change with tested spanner thickness, in 70 millimeters scopes, freely adjusts its height, make tested spanner be in horizontality all the time, eliminated angle and changed the error of indication of bringing;

2, owing to adopt two-way adapter, can examine and determine the torque value of the positive and negative both direction of spanner, and can once load onto, adjust direction arbitrarily;

3, because sensor base adopts board plug type, so the user can change the inferior torque sensor of corresponding retaining according to the different specification of torque spanner, model and measurement range, interchangeability is strong, and enlarges the working range of instrument;

4, because crossbeam two ends equilibrium point adopts edge of a knife shape and the pad that floats, gravity is evenly distributed on the edge of a knife, has eliminated because of using for a long time and produced the measuring basis error that wearing and tearing cause.

The description of the drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the vertical view of Fig. 1.

Structural representation when Fig. 3 is the utility model self check.

Fig. 4 is the axial cut-open view of the two-way adapter of the utility model.

Fig. 5 is that Fig. 4 E-E is to cut-open view.

Fig. 6 is the utility model crossbeam and pallet johning knot composition.

Fig. 7 is that Fig. 6 F-F is to cut-open view.

Fig. 8 is the utility model roller cut-open view.

Most preferred embodiment of the present utility model can be illustrated in conjunction with the accompanying drawings.

As seen, the utility model has comprised three parts, promptly measures the display part, supporting boosting mechanism, self-correcting part device.Measure the display part: be by fuselage 4, Gu weldering board plug type base 3 thereon, be inserted in the sensor 2 in the board plug type base 3, the indicating instrument 14 that joins by lead and sensor 2, and form with the two-way adapter 1 that sensor 2 upper end square holes link to each other by square joint, two-way adapter 1 is again by the turning sleeve 20 that has shoulder hole, gear 21, back-up ring 22, steel ball 23, spring 24, screw 25, push shaft 26 is formed, tooth sector 21 is fixed in the shoulder hole of turning sleeve 20 by back-up ring 22, also have hole perpendicular to its axis in the side of turning sleeve 20, steel ball 23, spring 24, in screw 25 load holes, one side of push shaft 26 is made dentation A and is meshed with gear 21, and opposite side is provided with two locating slot B and matches with steel ball 23.

The supporting boosting mechanism by glide base 6, guide pole 17, the leading screw 18, the lifting support 11 that has ladder-type trough that are fastened on the guide rail that has ladder-type trough 8 on the fuselage 4, join with ladder-type trough, be contained in the roller 5 on lifting support 11 ladder-type troughs, the boosting-rod 7 that is contained on the roller 5 is formed, on glide base 6, be furnished with a locating slot 13, also be provided with two through holes, a blind hole is equipped with guide pole 17, leading screw 18 and lifting support 11 respectively and joins.In addition, roller 5 is by outer ring 31, two inner rings 33, places the row of two between inside and outside circle steel ball 32 to form, and boosting-rod 7 links to each other with inner ring 33 by screw.

Used self-correcting part device is the pallet 19 that joins by crossbeam 10, by bracketplant 9 and crossbeam 10 when self-correcting, the counterweight 12 that is placed on the pallet is formed, bracketplant 9 is made up of by the knife 29 of △ the bracketplant frame 27, half garden edge bearing 28, the xsect that have slotted hole, the termination of crossbeam 10 has dovetail groove, match with △ knife 29 bases, outside edge bearing 28, be provided with groove E, F on garden arc and the straight flange, and match with bracketplant frame 27 and △ knife 29 tops respectively, backing pin 30 is contained on the bracketplant frame 27, is used for preventing edge bearing 28 landings.

Working routine of the present utility model is:

Calibrating is during torque spanner, and the spanner square toes are put into the square hole of two-way adapter 1, and handle is taken and is placed on the lifting support 11, moves forward and backward glide base 6 to suitable position; Rotate setting nut 15, drive lifting support and move up and down, make spanner be in horizontality, shifting roller 5 makes its outer garden and spanner handle tangent, pulls boosting-rod 7, and indicating instrument 14 can demonstrate accurate torque value.

When the calibrating instrument self check, sensor 2 is extracted out from board plug type base 3, changeed in 90 ° of locating slots 13 that are inserted on the glide base 6, crossbeam 10 is enclosed within on the sensor 2, and it is fixing by positioning key 16, hang up bracketplant 9, pallet 19 at the two ends of crossbeam, reach counterweight 12, make it be in static equilibrium state, energized, adjust instrument 14 to zero-bit, add required counterweight 12 step by step reposefully to maximum torque by the calibrating point of working out, removal counterweight then, this process triplicate.

Claims

1, a kind of torque spanner calibrating instrument that has self-checking function, by thereon the sensor that has square hole 2, boosting-rod 7, the guide rail 8 that has ladder-type trough, self checking part crossbeam 10, pallet 19 of fuselage 4 and dress, be placed on counterweight 12 on the pallet 19, indicating instrument 14 etc. and form, it is characterized in that:

A. the side on described fuselage 4 table tops is welded with board plug type base 3 admittedly, and the lower end of sensor 2 is inserted in the board plug type base 3, and the square hole of sensor 2 upper ends links to each other with two-way adapter 1 by square joint;

B. the described guide rail 8 that has a ladder-type trough is fastened on opposite side on described fuselage 4 table tops by screw, glide base 6 is housed on the ladder-type trough of guide rail 8, have two unthreaded holes and a blind hole on the glide base 6, the lifting support 11 that guide pole 17, leading screw 18 is housed respectively and has ladder-type trough links to each other, lifting support 11 links to each other with roller 5 by T type screw, also is furnished with locating slot 13 on the side of glide base 6:

C. described crossbeam 10 is to link to each other with pallet 19 by bracketplant 9, bracketplant 9 is made up of by the knife 29 of △ the bracketplant frame 27, half garden edge bearing 28, the sulphur cross section that have elongated slot, the termination of crossbeam 10 has dovetail groove D, match with △ knife 29 bases, on the outer garden arc of edge bearing 28 and straight flange, be respectively equipped with groove E, F, and match with bracketplant frame 27 and △ knife 29 tops respectively.

2, according to claim 1, the described torque spanner calibrating instrument that has self-checking function is characterized in that: described two-way adapter 1 is made up of the turning sleeve 20 that has shoulder hole, gear 21, back-up ring 22, steel ball 23, spring 24, screw 25, push shaft 26, tooth sector 21 is fixed in the shoulder hole of turning sleeve 20 by back-up ring 22, also have hole perpendicular to its axis in the side of turning sleeve 20, in steel ball 23, spring 24, screw 25 load holes, one side of push shaft 26 is made dentation A and is meshed with gear 21, and opposite side is provided with two locating slot B and matches with steel ball 23.

3, according to claim 1, the described torque spanner calibrating instrument that has self-checking function, it is held to levy and is: described roller 5 by outer ring 31, two inner rings 33, place the row of two between inside and outside circle steel ball 32 to be formed, described boosting-rod 7 joins by screw and inner ring 33.