JP2019089123A - Punch head structure of looseness preventive nut set - Google Patents

Abstract

To provide a punch head structure of a looseness preventive nut set.SOLUTION: A punch head structure of a looseness preventive nut set is equipped with a T-shaped collar fitted on a punch head body; a return spring; and a compression spring. The T-shaped collar is formed with a sleeve and a flange. A guiding groove inclining and penetrating is opened on the sleeve. A projecting pin passes through the guiding groove to be united with the punch head body, thereby regulating a stroke of the T-shaped collar within the guiding groove. If a punch head holder is pushed down, when a compression coil spring is made to abut on a looseness preventive washer, the T-shaped guiding groove is acted to rotate while turning upward along the guiding groove by reaction force, and the compression coil spring is synchronously interlocked to rotate a workpiece.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a punch head structure of a locking nut set, and more particularly to a punch head structure capable of accurately securing the position of a washer when riveting a washer and a nut. .

  The so-called locking nut set is a fixing part that simultaneously connects the locking nut and the locking washer, and when in use, both can be picked up and used simultaneously. In the locking nut set as shown in FIG. 5, among them, the locking nut 70 has a screw hole 71, and a cylindrical ring 72 is extended from the periphery of the screw hole 71. A central hole 75 substantially larger than 72 is provided, and a ring groove 76 larger than the diameter of the central hole 75 is formed on the periphery of the central hole 75, and the two locking nuts 70 and locking washers 74 are formed. At the contact surfaces of the components, wedge-shaped teeth 77 are formed which correspond to one another in their external form.

  At the time of combination of the locking nut 70 and the locking washer 74, after the cylindrical ring 72 passes through the center hole 75, an impact is given to the ring opening 73 of the cylindrical ring 72 using the punch press head 78, By forming the outer diameter of the ring opening 73 to be larger than the central hole 75, the locking nut 70 can not be interfered and can not escape, and an appropriate gap is movably held, and the locking nut 70 and A set of locking nuts is formed which simultaneously connects the locking washers 74.

  However, in the actual production process, the locking washer 74 is likely to be independently reversed relatively to the locking nut 70 in the step of pressing and riveting the punch head, and the two opposing wedge teeth 77 are minimized. It has been found that in the above situation, the punch press on the ring opening 73 of the cylindrical ring 72 tends to be unreliable, and the locking washer 74 bites too much and the cylindrical ring 72 is the surface of the locking washer 74. A higher level of failure may occur, which will have a significant impact on the quality and operation of the locking nut set. And, in the above-mentioned riveting process, it is necessary to provide human power to monitor the implementation work closely, and it is pointed out that the problem of not only increasing the production cost but also being disadvantageous to the automated production The

  Therefore, an object of the present invention is to provide a punch head structure of a locking nut set that prevents and solves the problem of rotational position shift of the locking washer in the punch press-rivet joint process.

Therefore, as a result of intensive studies to solve the above-mentioned problems of the present invention, the inventor of the present invention can accurately secure the position of the washer by the configuration as described later when riveting the washer and the nut. Attention was focused on the present invention.

That is, in order to solve the above-mentioned problems, the technical means of the present invention comprises a punch head holder, a punch head body, a T-shaped collar, a return spring, and a compression coil spring, and the punch head body is The projection head is assembled at the center of the punch head holder, a convex pin is provided at a predetermined position of the punch head main body, a sleeve and a flange are formed on the T-shaped collar, and a guide groove is formed in the sleeve to be inclined and penetrated The return spring and the compression coil spring are components that can be restored by receiving a force, and the return spring, the T-shaped collar, and the compression coil spring are movably fitted to the punch head main body sequentially, and the convex At the same time as the pin passes through the guide groove and is coupled to the punch head body, the movable stroke of the T-shaped collar is limited within the guide groove, and the punch head holder When the compression coil spring is brought into contact with the locking washer, the reaction force causes the T-shaped collar to rotate upward along the guide groove, and the work is synchronized by interlocking the compression coil spring. An object of the present invention is to provide a punch head structure of a locking nut set to be rotated.

  In the punch head structure of the locking nut set, the compression coil spring is adhesively fixed or soldered to the lower side of the flange.

Thus, the subject matter of the present invention is as described in the following (1).
(1) A punch head structure of a locking nut set including a punch head holder, a punch head body, a T-shaped collar, a return spring, and a compression coil spring,
The punch head body having a convex pin is provided at the center of the punch head holder, and a sleeve and a flange are formed on the T-shaped collar, and a guide groove is formed in the sleeve so as to obliquely pass through the sleeve. And the compression coil spring is a component that can be restored under force.
When the return spring, the T-shaped collar, and the compression coil spring are sequentially movably fitted to the punch head main body, and the convex pin passes through the guide groove and is coupled to the punch head main body At the same time, the movable stroke of the T-shaped collar is limited within the guide groove,
When the punch head holder is pressed, when the compression coil spring is brought into contact with the locking washer, the reaction force causes the T-shaped collar to rotate upward along the guide groove, thereby the compression coil spring The locking head of a set of locking nuts, characterized in that the workpieces are rotated in synchronization with each other.
In the description of the present invention, "locking nut set" is meant to include a locking nut, a locking washer and a fixing member having these as elements.

  According to the above-described implementation of the punch head structure of the locking nut set, the locking washer and the locking nut cross each other at any one relative angle and oppose each other before riveting the locking nut set. The two wedge teeth can be rotated to the lowest ideal position to effectively prevent the occurrence of a failure in riveting. As a result, if applied further to the automatic manufacturing process of the locking nut set, the cost can be significantly reduced and the production efficiency can be enhanced.

It is a disassembled perspective view which shows the punch head structure which concerns on one Embodiment of this invention. FIG. 1 is a combined perspective view showing a punch head structure according to an embodiment of the present invention. It is a punch press start position figure of punch head structure concerning one embodiment of the present invention. FIG. 7 is a diagram illustrating pressing and rotation of a punch head structure according to an embodiment of the present invention. FIG. 5 is a combined view of a conventional locking nut set.

  Hereinafter, the present invention will be specifically described with reference to the drawings. However, the present invention is not limited by the drawings and the like. The preferred embodiment of the punch head structure of the locking nut set of the present invention is, as shown in FIG. 1, said punch head structure comprising a punch head holder 10, a punch head body 20, and a T-shaped collar 30; Among them, the punch head holder 10 of the locking nut set has the insertion socket 11 and the position thereof corresponds to the predetermined position of the punch head main body 20. Two convex pins 22 are fixed. A sleeve 31 and a flange 32 are formed on the T-shaped collar 30, and two guide grooves 33 are formed in the sleeve 31 so as to be inclined and penetrate and correspond to each other in position. The return spring 40 and the compression coil spring 50 are components having an elastic restoring force.

  When the locking nut and locking washer are combined, the punch head body 20 is assembled and fixed on the insertion socket 11, and then the return spring 40, the T-shaped collar 30, and the compression coil spring 50. Are movably fitted to the punch head body 20 sequentially. At the same time as the convex pin 22 passes through the guide groove 33 formed in the T-shaped collar 30 and is coupled to the punch head body 20, the movable stroke of the T-shaped collar 30 is limited within the guide groove 33. Configured The compression coil spring 50 can be further attached below the flange 32 by adhesive fixing or solder bonding. With the above construction, as shown in FIG. 2, a punch head structure is formed which performs impact and riveting on the set of locking nuts. Next, the punch head holder 10 is connected to the hydraulic cylinder of the punch press, so that the processing procedure of riveting the set of locking nuts is performed with the vertical operation of the hydraulic cylinder.

  In the punch press / rivet joining process of the punch head structure of the locking nut set according to the present invention, the punch head is moved downward until the compression coil spring 50 comes into a state where it abuts against the locking washer 61. As shown in FIG. 3 shown, when the cylindrical ring 621 of the locking nut 62 is not yet deformed by a force, the wedge-shaped teeth 63 between the locking washer 61 and the locking nut 62 are relative. The position of the convex pin 22 is at the initial position in the guide groove 33 of the T-shaped collar 30, mimicking the situation where it is not located at the lowest point.

  As shown in FIG. 4, the change in the state of applying the punch press continuously to the locking nut assembly punch head structure according to the present invention causes the punch head holder 10 to continuously interlock and move the punch head main body 20 downward. In the moving situation, the compression coil spring 50 has already abutted against the locking washer 61, so it can not move downward, and the pressing force transmits a reaction to the T-shaped collar 30, and the T-shaped collar 30 The T-shaped collar 30 also rotates in synchronization with the compression coil spring 50 in response to an operation of rotating while moving upward along the inclined guide groove 33 under the restriction by the guide groove 33. To pull the wedge teeth of the lower locking washer 61 of the compression coil spring 50 into engagement with the wedge teeth of the locking nut 62, and the locking nut 62. The cylindrical ring 621 before the punch press, wedge teeth 63 between the lock nut 62 loosening the locking washer 61 ensures that the position the relative position of the lowest point.

  According to the above embodiment of the punch head structure of the locking nut set according to the present invention, the present invention is characterized in that the locking washer 61 and the locking nut 62 are optional 1 before riveting the locking nut set. It is understood that it is possible to intercross the relative angles and rotate the two opposing wedge teeth to the ideal position at the lowest position to effectively prevent the occurrence of a failure in riveting. As a result, if it is further applied to the automatic manufacturing process of the locking nut set, the cost can be significantly reduced, the production efficiency can be enhanced, and the industrial value is extremely large.

10: Punch head holder 11: Insertion socket 20: Punch head body 22: Convex pin 30: T-shaped collar 31: Sleeve 32: Flange 33: Guide groove 40: Return spring 50: Compression coil spring 61: Locking washer 62: Locking nut 621: Cylindrical ring 63: Wedge tooth 70: Locking nut 71: Screw hole 72: Cylindrical ring 73: Ring port 74: Locking washer 75: Center hole 76: Ring groove 77: Wedge tooth 78: Punch press head

Claims (1)

A punch head structure of a locking nut set including a punch head holder, a punch head body, a T-shaped collar, a return spring, and a compression coil spring,
The punch head body having a convex pin is provided at the center of the punch head holder,
A sleeve and a flange are formed on the T-shaped collar, and a guide groove is formed in the sleeve so as to be inclined and penetrated, and the return spring and the compression coil spring are components that can be restored under force.
When the return spring, the T-shaped collar, and the compression coil spring are sequentially movably fitted to the punch head main body, and the convex pin passes through the guide groove and is coupled to the punch head main body At the same time, the movable stroke of the T-shaped collar is configured to be limited in the guide groove,
When the punch head holder is pressed, when the compression coil spring is brought into contact with the locking washer, the reaction force causes the T-shaped collar to rotate upward along the guide groove, thereby the compression coil spring The locking head of a set of locking nuts, characterized in that the workpieces are rotated in synchronization with each other.

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