JP2592031B2 - Detent nut - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detent nut, which is used for tightening nuts of all general-purpose bolts, has a reliable function, can be easily attached and detached, and has a structure in which only the nut is machined and mounted. This nut can be easily replaced and used for the conventional bolts.

[0002]

2. Description of the Related Art Conventionally, there has been no time to develop a detent for a nut, and all of them have some disadvantages. Most of them have drawbacks such as those that require torque when tightening, those that are difficult to remove, those that are loosened by long-term vibration, and those that occupy a large area, and none are decisive. In addition, there are no officially approved test facilities, making it difficult to confirm the effects. In the patent No. 1432427 (a tightening bolt by a worm gear) of the applicant, which is logically proved, the principle of the worm and the wheel is used. Only use was conceivable. The present invention is an improvement on this.

[0003]

Although the bolt is not machined but is machined only on the nut, if a set screw is simply provided at right angles to the bolt from the side of the nut, the tip of the set screw is screwed. It is apparent that there is a variation in the reaction force that withstands the returning force when hitting the thread of the bolt to be set, hitting the valley groove, or at an unspecified position in between.
The present invention always makes contact with the valley grooves of unspecified bolts to be screwed in, and if the work is to slightly cut the threads on both sides of the valley grooves of the bolt, it is necessary to use the cutting property of the tip of the tapping screw to manually It is possible with the guide of the set screw
Further, if the holes are drilled so that the lead angles of the bolt screws are protruded, the effect is more certain. Regarding the position of the set screw to match the valley groove position of the unspecified bolt to be screwed immediately to the thread position on the inner surface of the nut, the starting position of cutting the screw of the nut is not specified from the manufacturing process, and the nut is not specified. Cannot measure from end face. Therefore, the position between the tangents of the bolt screw effective diameter circles on the both sides of the valley groove of the bolt to be screwed within the nut height range on the side surface of the nut is used as a contact point, and the tangent drawn on a plane perpendicular to the nut screw axis. If a small screw hole is provided so as to match, and the self-tapping screw is screwed in from the side of the nut along the direction opposite to the return of the nut, the screw can be twisted and inserted into the valley of the screw screw to be screwed. By turning, both sides are lightly cut at that position, and there is also the effect of the tension, and it is a reliable detent. In this case, the lead angle of the current JIS standard bolt according to each nominal diameter is as follows, and the lead angle is the angle formed with the screwing direction of the set screw as it is. When a set screw is inserted into the nut, the tension of the return of the nut is directly used, and the frictional resistance including stable cutting even in the right-angle direction is obtained.

[0004]

In order to ensure this, as described above, the development of a tapping screw which can be more strongly inserted into the bolt thread valley groove space than that of JIS, and the further insertion of In order to prevent the screw from falling off and to increase the rotational cutting or frictional resistance, make a screw in the insertion hole on the side of the nut and mount it.In addition to the vertical insertion on the side of the nut, the worm and worm wheel on the side of the bolt screw It becomes stronger when they are engaged together. For that purpose, JIS tapping screws for thin iron plates have insufficient cutting ability, so the material may be SKH equivalent type which has both toughness and cutting hardness.
Although it is not in S, if the head is made into a hexagon socket set screw shape to increase the tightening torque, it can withstand the cutting torque except for the extremely small diameter, and it will be embedded in the nut, temporarily stopping function It can be used conveniently as a conventional nut even when it is not used. In any case, if the JIS tapping screw is formed into three types with a notch at the end, and the guide screw is used to feed the bolt, the force against the bolt wall or the cutting torque can be obtained. If it is inevitable to use extra-fine dimensions, use a hexagon socket head set screw to make it easy to penetrate into the bolt valley groove and perform a sufficient effect as a thrust effect. Want to use a set screw with a hexagonal hole and a tapping shape. In spite of its use as an ordinary shaft stopper, there is no standard and it is not on the market, and in this case, it is conceivable to newly develop it with the present invention.

[0005] Next, in order to accurately drill a tap hole on the side surface of the nut in a direction penetrating the thread position of the nut, and to provide a cutout space of an appropriate volume at the nut screw position in contact with the valley of the bolt, a tap is required. This can be achieved by either drilling with a drill hole diameter equivalent to the thread area of the nut thread (equivalent diameter of the screw pitch) or slightly larger, or by machining only the notch from the inner diameter of the nut by a separate process. About the positioning of the tap lower diameter drill hole for mounting the set screw or tapping set screw, the drill position of the drilling machine tool was set in advance to the thread position of the nut, and the relative position was assumed and fixed Work by screwing the nut into the jig of the bolt figure gauge,
Regardless of whether the comb-shaped bolt shape gauge jig according to the bolt pitch is machined from inside the nut as a backing plate, it is necessary to specify the position of the drilling machine from the outside of the nut.

[0006]

[Function] A set screw or a tapping screw equivalent hexagon socket set screw inserted into the bolt screw valley hits the side wall of the bolt screw valley having the above-mentioned lead angle, and is further cut and screwed in. Even if it does not penetrate to the opposite side of the nut, it will be in a form that it is strong, but in this case, it is natural that this tapping action hexagon socket set screw should be tightened from the direction of preventing nut loosening is there.

[0007]

When the nut 2 is screwed into the bolt 1 and fixed at an arbitrary position, the set screw must be applied to the valley groove of the bolt even when a set screw is provided at a right angle from the side surface of the nut. The case where the through screw hole 3 is provided in a plane perpendicular to the nut screw shaft center between the parallel lines drawn on both effective diameter circles at the effective diameter positions on both side surfaces of the inner screw crests. The nut thread at the position contacting the bolt needs to be cut off, so that a notch breaking window 4 of an appropriate length is formed. It penetrates both sides 5 and 5 of the valley of the bolt screw to be screwed into that position, and is screwed into it or screwed in with the tip 6 of a set screw guided or mounted with a tapping function or cut, The tapping screw side is a worm and the bolt valley side is a worm wheel, but even if it stops on the way to the opposite side of the nut, it can be fixed by tensioning with the set screw and the lead angle of the bolt screw. It is effective. The head of the set screw is a hexagonal hole and tightened with an L-shaped tool 7 to make it strong and embedded, so that the nut has the same shape as the conventional shape and can be used in a normal manner. Fortunately, the tightening position of the set screw to the bolt valley can be palpated at the screw thread position when machining the nut.First, the drill point of the tap pilot hole diameter of the female screw hole for screwing the set screw hits the inclined surface of the nut. For eliminating the slip, crimp the nut slope to the 120-degree V-block or 60-degree V-block jig 8 in the form of a or b and use it for the drill guide hole 9 'and the set screw guide screw of the drill 9 with tap pilot hole diameter. The tap guide stupid holes 10 'of the tap 10 are provided on the left and right, respectively. Before the crimping, a bolt screw gauge 11 designed for a drilling machine and a related position is inserted into the nut, and the broken line is shown manually or with a pneumatic cylinder S1. X
The figure gauge is fixed at the position of the drill guide hole, which is previously set at a position where it is pulled through the nut screw thread by pulling and moving along the shape locus.
Work is performed after the block nut is pressed by the pneumatic cylinder S2. The case where the drill hole and the tap hole are in a straight line on the left and right is illustrated. However, when drilling and tapping in the same direction, the nut can be moved again, removed from the drill jig and machined, etc. is there. Note that the bolt shape gauge may be inserted by rotating the nut each time using the bolt itself as a jig, or the nut may be finely moved and palpated by placing a thread palpation pin, bolt shape comb tooth gauge, etc. in a fixed position. In any case, this embodiment is intended to cut out the thread of the nut and to mount a screw or a tapping set screw toward the position. The lower diameter drill for the set screw tapping penetrates to the opposite side of the nut in the embodiment, due to the freedom of selecting the front and back of the nut when using it, the drilling at the time of manufacturing, and the reduction of the man-hour due to the simultaneous tapping process. If the direction of the set screw is selected in advance, it is natural that the set screw can be kept at an appropriate position beyond the inner diameter contact point of the nut.

[0008]

According to the present invention, the thread of the nut is machined so that the set screw with a hexagonal hole or the tapping set screw with a hexagonal hole hits the thread groove of the bolt. In order to ensure this, it is designed to enter the nut screw shaft on the effective diameter tangent of a plane perpendicular to the nut screw shaft, so it will be twisted and protruded on both side walls of the valley of the bolt screw lead angle, which is effective only by itself Utilizing the tightening torque force of the set screw, it can be entered at the tip of the tapping blade, and even if the valley side is slightly cut, the set screw can be prevented from returning. Even if the function of cutting is neglected, the concept of always engaging with the bolt valley accurately has never been considered. Also, most conventional detent mechanisms will not work unless the nut is closed, but the present invention is effective at any stop position of the nut because there is no pre-machining on the bolt side, and therefore is useful in other fields such as pipe fittings. It can be used for screw parts such as retaining sockets.

[0009]

[Brief description of the drawings]

FIG. 1 is a partially cutaway overall perspective view showing an engaged state of a bolt, a nut, and a set screw with a hexagonal hole according to the present invention.

FIG. 2 is a longitudinal sectional view of a nut showing a tapping screw guide screw hole.

FIG. 3 is a side view of a hexagon socket set screw.

FIG. 4 is a perspective view of a drill hole positioning embodiment using a bolt shape gauge obtained by cutting a bolt into a thin shape;

[Explanation of symbols]

 1. Bolt 2. Nut 3. Through screw hole 4. Notch breaking window 5. 5. Both sides of bolt screw root 6. Set screw tip L-shaped tool 8. 120 degree V block jig 9. Tap pilot hole diameter drill 9 '. Drill guide hole 10. Tap for set screw guide screw 10 '. Tap guide hole 11. Bolt gauge X. Trajectory S1, S2. Pneumatic cylinder

Claims (2)

(57) [Claims] 1. A small screw screw for detecting an internal thread position of a general nut whose threading start position cannot be specified by a measuring gauge and aligning an outlet with an internal thread position within a height range of a side surface of the nut. Provide a mating hole, screw a hexagon socket tapping machine screw or an insect screw into it, screw it into the male thread groove of the unspecified bolt to be screwed to the nut, and lighten the thread on both sides of the bolt groove. By rotating or stretching, against the tilt due to the bolt screw lead angle, the cutting force and the tension from the horizontal direction alone or as a combined force receive the loosening force as a reaction force, so that it has the effect of detent prevention,
A detent nut with a small screw hole on the side of the nut. 2. A nut female screw according to claim 1, wherein a drill drilling hole drilling position for a small screw hole tapping process, a nut holding jig position, and a position related to a detection gauge are fixed. A method for manufacturing a detent nut that guides and moves a mountain position to fix it by crimping and drilling.