A kind of torque alarming device
Technical field
The invention belongs to instrument and alarming device field, relate in particular to a kind of torque alarming device.
Background technology
In daily life and industrial production assembling, all to use dynamic torque tool and twist opening or the trepanning firmware that bolt, screw, nut and other screw threads are tightly held bolt or nut.And the workpiece less with respect to volume, majority is to fix workpiece with anchor clamps earlier, and then uses dynamic torque tool (based on spanner) to screw the solid assembly of spiral shell.
Along with industrial progress, the accuracy of the solid assembly packing power of the spiral shell that workpiece is used relatively significantly promotes, thereby people are provided with monitor or alarming device on dynamic torque tool, and mechanical type or electronic type torque wrench have just been arranged, and structure is simplified, price is low comes out one after another in conjunction with the strain gauge spanner.These spanners all adopt single quantity mode to be arranged on shank broad end face middle position, and monitor and alarming device all are arranged on the output device, and the best force application location of output device placement when being spanner gripping just, therefore, output device tends to be subjected to the influence of palm veil, so the user often can't be by the state of the direct identification alarming device of vision, and need consuming time spanner be taken out monitor or the alarming device state on the output device watched by narrow space, can learn the torque value of bestowing the packing assembly, thisly can't be applicable to that any following very first time of operating environment provides the project organization of user's identification torque, and output device is gripped by palm to cover easier causing button to be set by false touch on the output device, is the problem that existing dynamic torque tool obviously exists.
Summary of the invention
The objective of the invention is to have the problems referred to above, proposed a kind of torque alarming device of warning obviously and having the assembling cover at existing technology.
Purpose of the present invention can realize by following technical proposal: a kind of torque alarming device, it is characterized in that, comprise the torsion seat, shifting part, block piece, force-limit spring and assembling cover, described assembling cover is used to locate assembly and the assembling cover can rotate with respect to the torsion seat, shifting part is arranged in the torsion seat and with the assembling cover and links to each other, force-limit spring be arranged between torsion seat and the block piece and under the elastic force effect of force-limit spring block piece above-mentioned shifting part is stopped, when the torsion that assembling cover is subjected to is crossed block piece greater than the supporting shifting part that can drive of the elastic force fashionable dress of force-limit spring.
Assembly is placed in the assembling cover, and the operator is with the solid assembly of spiral shell on dynamic torque tools such as the spanner rotation assembly, and the assembling cover is subjected to twisting force to drive shifting part to rotate, and block piece is subjected to the elastic force effect of force-limit spring to stop that shifting part rotates; When the suffered torsion of assembling cover is excessive when surpassing force-limit spring and bestowing the elastic force of block piece, shifting part will be crossed block piece and be rotated further.In case lost the drag effect of block piece, shifting part just clashes into the torsion seat fast and knocks, and the hand that the while operator holds spanner has tangible seismaesthesia, has reached default packing power with this solid assembly of spiral shell of warning operator's assembly.
In above-mentioned torque alarming device, described block piece comprises and the hinged pawl body of torsion seat and can be around the triangle pawl head of pawl body swing.The pawl body rotated around the torsion seat when block piece was subjected to forward thrust of shifting part, triangle pawl head be subjected to shifting part back extruding force or all can slide during the torsion of reduction torsion spring around the pawl body.
In above-mentioned torque alarming device, be provided with reduction torsion spring between described block piece and the torsion seat.When triangle pawl head was subjected to the shifting part extruding, reduction torsion spring was squeezed equally, and when extruding force disappeared, the twisting force of reduction torsion spring made it to slide around the pawl body on triangle pawl head.
In above-mentioned torque alarming device, has the spring base that is used to place force-limit spring on the described torsion seat.Force-limit spring can be placed on force-limit spring can only be stretched vertically.
In above-mentioned torque alarming device, described spring base is a groove on the torsion seat, and force-limit spring one end is against on the block piece, and the other end is against on the torsion seat.Force-limit spring under this scheme is unadjustable, and device can only be warned the required packing power of torque value that reaches single.
In above-mentioned torque alarming device, by the regulating part that has been threaded, the other end of above-mentioned force-limit spring is resisted against on the regulating part on the described spring base, and regulating part partly stretches out the torsion seat.The rotation regulating part makes it to produce in spring base and relatively moves, thereby the change force-limit spring presses on the elastic force on the block piece.
In above-mentioned torque alarming device, has scale marker on the described regulating part.Determine the preset torque value according to job requirement, the rotation regulating part makes the scale on the regulating part conform to the preset torque value.
In above-mentioned torque alarming device, described shifting part comprises swing arm, lever one and lever two, swing arm is connected with the assembling cover, lever one middle part and torsion seat are hinged, lever two middle parts and torsion seat are hinged, lever is held with an end of lever two mutually hinged one by one, and the other end of lever one is close to an end of swing arm, and the other end of lever two is close on the block piece.The rotating band movable pendulum arm swing of assembling cover, an end of swing arm promote lever one swing, and lever one swing makes lever two swings by articulated structure, and the swing of lever two promotes block piece.
In above-mentioned torque alarming device, be provided with reduction torsion spring between described lever two and the torsion seat.When the torsion of lever two suffered assembling covers disappeared, reduction torsion spring made lever two homings.
In above-mentioned torque alarming device, described lever 21 ends are provided with the convex shoulder that can push block piece.When lever two swings, convex shoulder extruding block piece makes the force-limit spring compression, when convex shoulder is crossed block piece, can knock the torsion seat.
Compared with prior art, the invention has the advantages that:
1. alarming device is transferred on the anchor clamps by spanner, thoroughly solved because of having the inconvenience that spanner the brought influence of alarming device, just can realize accurate location the packing power with common wrench.
2. according to of the different requirements of different working environments, can regulate the torque alarming device required torque value is set the solid assembly packing power of spiral shell of workpiece.
Description of drawings
Fig. 1 is the blast structural representation among the embodiment provided by the invention.
Fig. 2 is the perspective view of the torsion seat among the embodiment provided by the invention.
Fig. 3 is the positive and negative structural representation of the torsion seat among the embodiment provided by the invention.
Fig. 4 is the perspective view of the block piece among the embodiment provided by the invention.
Among the figure, 1, the torsion seat; 2, shifting part; 3, block piece; 4, force-limit spring; 5, assembling cover; 6, force transmiting disk; 7, triangle pawl head; 8, pawl body; 9, reduction torsion spring; 10, regulating part; 11, spring base; 12, scale; 13, position line; 14, swing arm; 15, lever one; 16, lever two; 17, hinged; 18, convex shoulder; 19, synchronizing shaft.
The specific embodiment
Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As Fig. 1, Fig. 3, shown in Figure 4, the present invention includes torsion seat 1, shifting part 2, block piece 3, force-limit spring 4 and assembling cover 5, circular torsion seat 1 can be fixed by bolts on the working plate.
Specifically, block piece 3 and force-limit spring 4 are located on the bottom surface of torsion seat 1, the block piece 3 and the torsion seat 1 hinged 17 of claw type, the pawl body 8 of block piece 3 props up mutually with force-limit spring 4 one ends, and a reduction torsion spring 9 that can make triangle pawl head 7 suffered extruding forces disappearance back homings is set between the triangle pawl head 7 of block piece 3 and the torsion seat 1.The spring base 11 that force-limit spring 4 is housed is fixed in the torsion seat 1, and spring base 11 1 ends are threaded with the regulating part 10 that indicates scale 12, and regulating part 10 passes from the side that torsion seat 1 indicates position line 13.
Shifting part 2 comprises swing arm 14, lever 1 and lever 2 16, and lever 1 and lever 2 16 are all hinged 17 with torsion seat 1, and hinged 17 between lever 1 and the lever 2 16, an end of lever 1 is close on the end of swing arm 14.Be provided with the reduction torsion spring 9 of homing after allowing lever 2 16 suffered torsion disappear between lever 2 16 and the torsion seat 1, lever 2 16 1 ends are provided with the convex shoulder 18 that can push block piece 3.
As Fig. 2, shown in Figure 3, there is a synchronizing shaft 19 to run through wherein at torsion seat 1 center, the upper end of synchronizing shaft 19 is square, matches with the square centre bore of force transmiting disk 6, the lower end of synchronizing shaft 19 is oval, is connected with swing arm 14 1 ends.Use the pin clamping between force transmiting disk 6 and the assembling cover 5, pin can be welded in the groove of force transmiting disk 6.
Assembly is put on the corresponding assembling cover 5, with the solid assembly of spiral shell on the spanner rotation assembly, increase along with torsion, assembling cover 5 drives force transmiting disk 6 and rotates together, and by synchronizing shaft 19 drive swing arms 14 swings, the end that swing arm 14 promotes levers 1 moves, and lever 1 drives hinged 17 lever 2 16 and moves, and the convex shoulder 18 of lever 2 16 promotes the block piece 3 be close in the time of the coupled reduction torsion spring of lever 2 16 extruding 9.Block piece 3 is subjected to thrust and makes it compression around 1 swing of torsion seat and extruding force-limit spring 4, when the torsion that applies when spanner reaches certain value, the convex shoulder 18 of lever 2 16 just can be crossed the triangle pawl head 7 of block piece 3, in case convex shoulder 18 has lost stopping of block piece 3, just can clash into torsion seat 1 fast, thereby knock, the hand that the while operator holds spanner has tangible seismaesthesia, and the solid assembly of caution operator spiral shell has reached required torque value.This moment, the operator unclamped spanner, the torsion that assembling cover 5 is subjected to disappears, be subjected to the reduction torsion spring 9 of lever 2 16 extruding will discharge torsion, lever 2 16 is stressed toward swivel motion, triangle pawl head 7 swings on the extruding block piece 3, the reduction torsion springs 9 that triangle pawl head 7 is linked to each other are squeezed, and when lever 2 16 was crossed triangle pawl head 7 and is returned to no stress, the torsion that triangle pawl head 7 discharges because of reduction torsion spring 9 is squeezed swung to no stress again.
When required torque value need change, only need rotation regulating part 10, make it to relatively move with spring base 11 generations, thereby change force-limit spring 4 presses on the elastic force on the block piece 3, aligns according to the position line 13 on scale on regulating part 10 peripheries 12 and torsion seat 1 side and judges the torque value that whether reaches required.
According to the difference of assembly, replaceable different assemblings cover 5 fixes assembly.Certainly, warning way can also be provided with a closed circuit that energy is luminous between the convex shoulder 18 of torsion seat 1 and block piece 3, plays the effect of a switch closure when convex shoulder 13 clashes into torsion seat 1, and this moment, circuit turn-on just can produce luminous caution effect.