TW201533334A - Fastening device with fastening tension indication and manufacturing method thereof - Google Patents

Abstract

The present invention provides a fastening device with fastening tension indication, which comprises a nut; a gasket which is position-limited on the nut, in a truncated cone shape, and is opened with a through hole is formed; and filler disposed on the gasket. The gasket comprises an upper ring surface facing the nut, a lower ring surface configured with an interval to the upper ring surface, an annular groove formed on the lower ring surface, and a plurality of discharge grooves symmetrically formed on the lower ring surface with intervals, communicated with the annular groove, and extended to the outer edge of the lower ring surface. The filled is filled in the annular groove. When the tension held by the fastening device reaches the required value, the filler will be discharged from the discharge groove to be acknowledged and confirmed by the user. The present invention also provides a manufacturing method of the fastening device.

Description

Locking device with locking tension indication and manufacturing method thereof

The present invention relates to a locking device and a method of manufacturing the same, and more particularly to a locking device having a locking tension indication and a method of manufacturing the same.

Referring to Figures 1 and 2, in the new patent application No. M240494 of the Republic of China, a nut assembly 1 is disclosed, comprising a washer 11 having a perforated and frustoconical shape, and a shaft 11 along the washer. To the set nut 12. The nut 12 includes two opposite sides 121, and an annular projection 122 extending from the side 121 facing the washer 11 toward the washer 11 and terminating the washer 11. The nut assembly structure 1 combines the nut 12 and the washer 11 to facilitate inventory management and assembly assembly, and when the nut assembly structure 1 cooperates with a bolt 21 as shown in FIG. 3 to lock the two to-be-fixed members 22 When the washer 11 is clamped by the axial tension, a reverse resistance is generated, whereby the effect of preventing the nut assembly 1 from coming loose can be achieved by the resistance.

Referring to FIG. 3, when the nut assembly structure 1 cooperates with the bolt 21 to lock the waiting fixture 22, it is affected by factors such as the surface condition of the waiting fixture 22, the climate humidity, the accuracy of the bolt 21, and the like. Even if the high torque is applied, the waiting fixture 22 cannot be reliably tightened. Close combination. That is to say, the above design does not allow the constructor to confirm whether the nut assembly structure 1 is indeed screwed.

Accordingly, it is an object of the present invention to provide a locking device having a lock tension indication.

Therefore, the locking device with the locking tension indication of the present invention comprises a nut, a washer limited to the nut and having a frustoconical shape and a through hole, and a filler disposed on the gasket. The nut includes a body having a screw hole, and a protruding member disposed on the body and surrounding the screw hole. The protruding member has an extending portion extending axially from the body in a direction away from the body, and a limiting portion extending obliquely outward from the extending portion away from the body.

The gasket is limited to be located between the limiting portion of the nut and the body and has a frustoconical shape and a through hole. The gasket includes an upper annular surface facing the nut, a lower annular surface spaced apart from the upper annular surface, an annular groove formed on the lower annular surface, and a plurality of symmetrically spaced apart openings on the lower annular surface, and a discharge groove that communicates with the annular groove and extends to the outer edge of the lower toroid. The filler is filled in the annular groove and is discharged from the discharge groove when the gasket is deformed and squeezed.

Another object of the present invention is to provide a method of manufacturing the aforementioned locking device.

Therefore, the manufacturing method of the locking device having the lock tension indication of the present invention comprises a preparation step, a set of standing steps, a combining step, and a filling step. In the preparation step, preparing a nut and a truncating head Conical and open with a perforated gasket. The nut includes a body having a screw hole, and a protruding member disposed around the screw hole and extending axially away from the body. The gasket includes an upper annular surface, a lower annular surface spaced apart from the upper annular surface, an annular groove formed on the lower annular surface, and a plurality of symmetrically spaced apart openings on the lower annular surface and connected to the annular groove And extending to the discharge groove of the outer edge of the lower torus.

In the set of steps, the protruding member of the nut is threaded through the through hole of the washer and the upper surface of the washer faces the body of the nut. In the joining step, the protruding member of the nut is axially pressed to deform the protruding member and to limit the gasket. In the filling step, a filler is filled into the annular groove of the gasket to produce a locking device having a lock tension indication.

The effect of the invention is that the gasket is deformed by the belt fixing member and the nut when subjected to a certain tension, and the filler filled in the annular groove of the gasket is gradually pushed to the discharge grooves. When the tension reaches the desired specification value, the filler is discharged from the discharge slot for the user to confirm that the locking device has been screwed tightly and reaches the desired specification value, increasing safety.

31‧‧‧Preparation steps

32‧‧‧Setting steps

33‧‧‧ Combining steps

34‧‧‧filling steps

4‧‧‧Locking device

41‧‧‧ Nuts

411‧‧‧ Ontology

412‧‧‧ screw hole

413‧‧‧ protruding parts

414‧‧‧Extension

415‧‧‧Limited

42‧‧‧Washers

421‧‧‧Perforation

422‧‧‧Upper ring

423‧‧‧ Lower annulus

424‧‧‧ring groove

425‧‧‧Drainage trough

43‧‧‧Filling

5‧‧‧ bolt

6‧‧‧Fixed parts

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a perspective view showing a nut assembly structure disclosed in the new patent application No. M240494 of the Republic of China; 2 is a side sectional view for assisting in explaining FIG. 1; 3 is a side cross-sectional view showing the state in which the nut combination structure and a bolt are coupled to the two members to be fixed; FIG. 4 is a flow chart illustrating the method of manufacturing the locking device with the lock tension indication of the present invention. A preferred embodiment of the present invention; FIG. 5 is an exploded perspective view showing a preparation step of the preferred embodiment; FIG. 6 is a schematic view showing an assembly step and a bonding step of the preferred embodiment; 1 is a perspective view showing a filling step of the preferred embodiment; FIG. 8 is a side sectional view showing a locking device of the preferred embodiment; and FIGS. 9 to 11 are bottom views showing the preferred embodiment. In an example, a gasket includes an arrangement of different numbers of discharge grooves; FIG. 12 is a side cross-sectional view showing the state in which the locking device is coupled with a bolt to couple two fixing members in the preferred embodiment; And Fig. 13 is a side sectional view showing the state in which the tension applied to the locking device reaches the target value in the preferred embodiment.

Referring to FIG. 4, a preferred embodiment of a method for manufacturing a locking device having a locking tension indication according to a preferred embodiment includes a preparation step 31, a set of standing steps 32, a combining step 33, and a filling. Step 34. Referring to Figures 4 and 5, in the preparation step 31, a nut 41 and a washer 42 having a frustoconical shape and a through hole 421 are formed. The nut 41 includes a body 411 having a screw hole 412 defined therein, and a screw hole 412 surrounding the screw hole 412. A protruding member 413 is disposed and axially extended from the body 411 away from the body 411. The gasket 42 includes an upper annular surface 422, a lower annular surface 423 spaced apart from the upper annular surface 422, an annular groove 424 formed on the lower annular surface 423, and a plurality of symmetrically spaced apart openings on the lower annular surface 423. And a discharge groove 425 communicating with the annular groove 424 and extending to the outer edge of the lower annular surface 423.

Referring to FIG. 4 and FIG. 6 , in the assembly step 32 , the protruding member 413 of the nut 41 is inserted through the through hole 421 of the washer 42 and the upper surface 422 of the washer 42 faces the body 411 of the nut 41 . . In the joining step 33, the projecting member 413 of the nut 41 is axially pressed to deform the projecting member 413 and to position the washer 42. Referring to Figures 4 and 7, in the filling step 34, a filler 43 is dispensed into the annular groove 424 of the gasket 42 to produce a locking device 4 having a locking tension indication.

Referring to FIG. 7 and FIG. 8 , the protruding member 413 of the locking device 4 has an extending portion 414 extending from the body 411 and extending axially away from the body 411 , and a portion 414 facing away from the body The direction of 411 is inclined to the outwardly extending limit portion 415. It should be further noted that the discharge grooves 425 are symmetrically arranged at equal angular intervals, so the number and arrangement as shown in FIG. 9 or the number and arrangement shown in FIG. 10 and FIG. 11 may be used. the way. In this embodiment, the filler 43 is a silicone rubber and has a conspicuous color to facilitate observation, but is not limited thereto.

Referring to FIG. 12 and FIG. 13 , the locking device 4 cooperates with a bolt 5 for locking the two parts to be fixed 6 , and when the user applies a torque to the nut 41 or the bolt 5 for locking. When in the axial direction, a The tension presses the washer 42 and generates a resistance to push the nut 41 outward, thereby making the engagement between the nut 41 and the bolt 5 closer and less easy to loosen. When the tension is gradually increased, the gasket 42 is pressed by the tension to gradually deform and is pressed against the upper portion to be fixed 6 in Fig. 13, and the filler 43 filled in the annular groove 424 is gradually squeezed. Up to the discharge slots 425, and when the tension reaches a desired value, the filler 43 is squeezed out of the discharge slots 425, allowing the user to confirm that the locking device 4 and the bolts 5 are indeed tightened. .

In summary, the locking device 4 can achieve the function of anti-loose and tension indication by the deformation of the washer 42. The measurement method of the tension indication is to measure the locking device 4 and the corresponding The amount of direct displacement between the fixing members 6 is used to determine the tension value, so that it is not easily affected by other external factors, so the accuracy is high, and the filler 43 uses a color-sensitive silicone which allows the user to observe at a distance and It is confirmed that the convenience is improved, and the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

4‧‧‧Locking device

41‧‧‧ Nuts

411‧‧‧ Ontology

412‧‧‧ screw hole

413‧‧‧ protruding parts

414‧‧‧Extension

415‧‧‧Limited

42‧‧‧Washers

421‧‧‧Perforation

422‧‧‧Upper ring

423‧‧‧ Lower annulus

424‧‧‧ring groove

425‧‧‧Drainage trough

43‧‧‧Filling

Claims (3)

A locking device with a locking tension indication, comprising: a nut, comprising a body having a screw hole, and a protruding member disposed on the body and surrounding the screw hole, the protruding member having a An extension portion extending axially away from the body, and a limiting portion extending outwardly from the extending portion away from the body; a gasket is disposed at the limiting portion of the nut and The body is frustoconical and has a perforation. The gasket includes an upper annular surface facing the nut, a lower annular surface spaced apart from the upper annular surface, and an annular groove formed on the lower annular surface. And a plurality of symmetrically spaced apart opening grooves extending from the annular groove and extending to the outer edge of the lower toroid; and a filler filled in the annular groove, and the gasket When it is deformed and pressed, it is discharged from the discharge tank. A locking device having a locking tension indication according to claim 1, wherein the filling is a silicone. A manufacturing method of a locking device with a locking tension indication, comprising: a preparation step of preparing a nut, and a washer having a frustoconical shape and a perforation, the nut comprising a body having a screw hole And a protruding member disposed around the screw hole and extending axially away from the body by the body, the gasket comprising an upper annular surface, a lower annular surface spaced apart from the upper annular surface, and a lower ring opening An annular groove on the surface, and a plurality of symmetric grooves are symmetrically spaced apart from the lower annular surface, and communicate with the annular groove and extend to the discharge groove of the outer edge of the lower annular surface; a set of steps, the protruding member of the nut is inserted through the through hole of the gasket and the upper surface of the gasket faces the body of the nut; in a bonding step, the protruding member of the nut is axially pressed The protruding member is deformed and the gasket is restrained; and a filling step is performed by filling a filler into the annular groove of the gasket to obtain a locking device having a locking tension indication.