CN2034106U

CN2034106U - Fixed torque value wrench

Info

Publication number: CN2034106U
Application number: CN 88204310
Authority: CN
Inventors: 王常文
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-04-25
Filing date: 1988-04-25
Publication date: 1989-03-15

Abstract

The utility model discloses a fixed torque value wrench composed of the head component of a wrench, the rod component of the wrench and a connection component. The wrench is especially suitable for assembling and disassembling the sleepers of tracks, connecting perpendicular screw bolts and horizontal bolts according to the fixed torque value in railway work departments. In addition, the wrench is also provided with a reversing device, and various screw bolts and screw nuts can be quickly tightened clockwise or anticlockwise.

Description

Fixed torque value wrench

The utility model belongs to the improvement of deciding the torque value spanner.

Deciding the torque value spanner is suitable for needs and decides the tight a bolt workplace of nut of torque value and use.Be particularly suitable for railway department and load and unload track, sleeper, the vertical bolt of connection and leveling screw fast to decide torque value.

At present, existingly deciding the torque value spanner, is not complex structure, and machined requires high, can not guarantee the degree of accuracy of torque value exactly.

The purpose of this utility model provides a kind of relatively simple for structure, and it is fast to tighten bolt speed, easy machining, and can guarantee the definite value torque wrench of the degree of accuracy of torque value.

Operation principle of the present utility model is as follows:

During work, at first commutator is turned to desired location.When commutator rotates, drive king pin and rotate together.Rotational pin is given pressure of stage clip when rotating, and stirs ratchet pawl it is meshed with the internal tooth of collet head, and ratchet pawl is meshed with driving end.After the ratchet pawl in the driving end parts is stressed, wrench body will be that axle rotates around it with the fulcrum post, drive rotary pawl simultaneously at the wrench body intrinsic deflection.Because rotary pawl is subjected to locating the pressure that plain cushion passes to torque spring, makes rotary pawl continue deflection and be subjected to resistance.The pressure that is subjected to when rotary pawl is during greater than the pressure of torque spring, and rotary pawl deflection contacts with the wrench body inwall acoustic signal takes place, and the expression torque value has reached setting.After external force was eliminated, rotary pawl automatically reset under the effect of torque spring, and making spanner is to use next time to get ready.

Below in conjunction with accompanying drawing the utility model is described in detail as follows:

Fig. 1 is for deciding the front view of torque value spanner;

Fig. 2 is for deciding the partial sectional view of torque value spanner wrenching bar;

Fig. 3 is for deciding the partial sectional view of torque value spanner driving end;

Fig. 4 is for deciding torque value spanner A-A profile

The utility model is made up of driving end parts, wrenching bar parts and connector.The driving end parts by steering gear 1, collet head 2, ratchet pawl 3, fulcrum post 4, king pin 5, stage clip 6, turriform spring 7, circlip for shaft 8, driving end pin 9, driving end 10, pull fork 11, pull bolt 12 and split pin 13 is formed.The wrenching bar parts are made up of wrench body 17, rotary pawl 18, location plain cushion 19, torque spring 20, support pads 21, ball 22, plain cushion 23, adjustment bolt 24, adjustment nut 25 and plastic handle 26.Connector is made up of wrenching bar 14, circlip 15 and alignment pin 16.

Embodiment:

During work, collet head 2 is enclosed within on the sleeper nut, grasps the hemispherical position of plastic handle 26.The angle that makes wrench body 17 and ground is between 0 °～45 °.Rotate and decide the torque value spanner, give pretightning force of nut.Then, make wrench body and ground keep almost parallel.Be rotated further and decide the torque value spanner, till hearing sound.At this moment, represent that promptly the stressed of nut is reasonably, reached desired torque value.

Claims

1, a kind ofly decide the torque value spanner, it is characterized in that by what driving end parts, wrenching bar parts and connector were formed: the driving end parts by steering gear, collet head, ratchet pawl, fulcrum post, king pin, stage clip, turriform spring, circlip for shaft, driving end pin, driving end, pull fork, pull bolt and split pin is formed; The wrenching bar parts are made up of wrench body, rotary pawl, location plain cushion, torque spring, support pads, ball, plain cushion, adjustment bolt, adjustment nut and plastic handle; Connector is made up of wrenching bar, circlip and alignment pin.