CN2150976Y - Torque moment adjustable spanner for railway line - Google Patents

Abstract

The utility model relates to a special wrench for adjusting torque railway lines which is a special tool for screwing down or loosening nuts of screw thread nails on the tracks. The special wrench comprises a handle whose inner part is provided with a torque adjusting mechanism and a bidirectional round trip and idly rotating ratchet wheel and a sleeve barrel which can be plugged in at the centralized positioning shaft of the handle. When the screw bolt is screwed down and the torque reaches the set value, the wrench automatically slides and fastens and changes into idle rotation. When loosening and dismounting the screw bolt, the wrench can loosen the screw bolt within the allowed intensity without adjusting the torque. Moreover, the special assembly type wrench with round trip and idle rotation functions is arranged in bidirectional manner. The wrench which is a testing tool has the advantages of easy use and saving a set of special torques.

Description

Torque moment adjustable spanner for railway line

The utility model relates to the specific purpose tool that a kind of railway track maintenance activity is used to tighten or unscrew track screw spike nut.

Present domestic railroad track maintenance is used to tighten or when unscrewing the operation of screw spike nut, the special spanner (being commonly called as the cripple) that uses is a kind of T font sleeve spanner, its moment of torsion can not be controlled, when the screw spike that needs the definite value moment of torsion is tightened, then after tightening nuts, re-use and survey torque wrench mensuration, increased flow chart and equipment, be unsuitable for maintenance activity.

The purpose of this utility model is the shortcoming that overcomes existing special spanner, provides a kind of moment of torsion to set, and when tighting a bolt, when moment of torsion reached setting value, the automatic slide fastener of spanner became idle running.Unscrewing when unloading bolt, need not to set moment of torsion, spanner can unscrew bolt in the intensity allowed band, and at the positive and negative two-way assembly type special spanner that the return lost motion functionality is all arranged.

The technical solution of the utility model is achieved in that a kind of moment of torsion railway track special spanner of setting, form by handle and the sleeve that is plugged on handle center's locating shaft, its special character is that handle is a circular central box, both sides are fixed with the left and right sides handlebar that hollow pipe is made respectively, be provided with two-sided ratchet in the central cassette, being provided with a center in the ratchet internal tooth has the groove other end to stretch out the centralized positioning axle of the outer squarely plug of box, be provided with two-way return idle running ratchet in the groove of centralized positioning axle, with central cassette location ratchet, and use ratchet commutation button, by the commutation of ratchet commutation handle control ratchet, the external tooth of two-sided ratchet is by the torque setting ratchet location that is hinged on the central cassette, and use is located at ratchet push rod in the right handles pipe successively, pad, spring, pad, sleeve pipe, nut, screw rod, knob is formed torque setting mechanism, has on the right handles to set the moment of torsion window displayed.

The utility model compared with prior art has can be for convenience detach and assembling, two after the dismounting can be contained in the special bag, can bear, be easy to carry, when tighting a bolt, can set moment of torsion, when moment of torsion reaches setting value, the automatic slide fastener of spanner becomes idle running, observe in the torque setting display window of big I on handle of setting moment of torsion, when pine is unloaded bolt, then need not to set torque wrench and can in the intensity allowed band, unload bolt by pine, and spanner can two returns dally, handled easily, the advantages such as testing tool of having saved a cover measurement moment of torsion.

Now describe the utility model most preferred embodiment in conjunction with the accompanying drawings in detail:

Fig. 1 is the side-looking center section plan of handle

Fig. 2 is the fragmentary cross-sectional view of overlooking of handle

Fig. 3 is the sleeve side view

Among the figure:

1, left hand sleeve 15, spring shim

2, left handle bar 16, torque setting spring

3, handle center's box 17, spring shim

4, center lid hold-down screw 18, sleeve pipe

5, center lid 19, torque setting screw rod

6, forward and reverse idle running ratchet is located shaft-cup 20, torque setting nut

7, rotating commutation idle running ratchet 21, right handles end cap

8, ratchet commutation handle 22, end cap hold-down screw

9, ratchet commutation control knob 23, right hand sleeve

10, commutation control knob alignment pin 24, torque setting knob hold-down screw

11, inside and outside two-sided ratchet 25, torque setting knob

12, torque setting ratchet 26, centralized positioning axle, pellet shot from a slingshot, spring

13, torque setting ratchet push rod 27, moment of torsion display window

14, right handles bar 28, sleeve

A kind of moment of torsion railway track special spanner of setting is provided with the torque setting Agency And by inside and forms to the handle of return idle running ratchet and the sleeve (28) that can be plugged on handle center's locating shaft, handle is that circular central box (3) both sides are fixed with the left and right sides handlebar (2) (14) that hollow pipe is made respectively, being provided with the center that is provided with in two-sided ratchet (11) the ratchet internal tooth in the central cassette has the groove other end to stretch out the centralized positioning axle (26) of the outer square plug of central cassette, two-way return idle running ratchet (7) is housed in the centralized positioning axial trough, can two-way return idle running ratchet (7) be horizontally slipped by ratchet control handle (8) when pulling ratchet commutation control knob (9), thereby realize spanner return lost motion functionality when forward and reverse rotation.The external tooth of two-sided ratchet (11), control its rotation by the torque setting ratchet (12) that is articulated on the central cassette, be installed in torque setting ratchet push rod (13) and spring shim (15) in the right handles, torque setting spring (16), spring shim (17), sleeve pipe (18), torque setting nut (20), torque setting screw rod (19) and the torque setting knob (25) that is located at right hand pommel are connected on the torque setting screw rod (19) by torque setting knob hold-down screw (24).When rotation torque setting knob (25), by screw thread between screw rod (19) and nut (20) sleeve pipe (18) spring shim (17) is moved in handle tube, thereby the pressure of compression torque setting spring (16) spring (16) is pressed in ratchet (12) by pad (15) and ratchet push rod (13) and goes up and be delivered on the external tooth of ratchet (11(11), and the size of spring pressure can be observed affirmation in the torque setting display window (27) of right handles.When tighting a bolt turning handle, being hinged on torque setting ratchet (12) on handle center's box makes between ratchet and ratchet by the spring applied pressure and produces frictional force, stop mutually and move, when the torsional forces of handle during less than frictional force sleeve together rotate with handle, can tight a bolt; When handle torsional forces during greater than frictional force, ratchet and ratchet produce and slide, the spanner slide fastener, and handle idle running can be heard " card is answered " sound when ratchet is crossed ratchet simultaneously; When unscrewing bolt, the handle counter-rotating, need not to set moment of torsion this moment, and ratchet is buckled on the external tooth of ratchet, and spanner can unload bolt by any big or small moment of torsion pine in the intensity allowed band.The torque setting adjustable range is 0～250Nm.

Claims (2)

1, a kind of moment of torsion railway track special spanner of setting, form by handle and the sleeve that is plugged on handle center's locating shaft, it is characterized in that handle is to be fixed with the left and right sides handlebar (2) that hollow pipe is made respectively by a circular central box (3) both sides, (14), be provided with two-sided ratchet (11) in the central cassette (3), being provided with a center in the ratchet internal tooth has the groove other end to stretch out the centralized positioning axle (26) of the outer squarely plug of box, be provided with two-way return idle running ratchet (7) in the groove of centralized positioning axle, with center lid (4) location ratchet (7), and use ratchet commutation button (9) by ratchet commutation handle (8) control ratchet (7) commutation, the external tooth of two-sided ratchet (11), by torque setting ratchet (12) location that is hinged on the central cassette, and use is located at ratchet push rod (13) pad (15) spring (16) pad (17) sleeve pipe (18) nut (20) screw rod (19) knob (25) composition torque setting mechanism in the right handles pipe successively.

2, spanner according to claim 1 is characterized in that having on the right handles setting moment of torsion display window (27).

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