CN2536834Y

CN2536834Y - Anti-loose self-lock thread

Info

Publication number: CN2536834Y
Application number: CN 02207714
Authority: CN
Inventors: 陈立勇; 陈福建; 张赟; 豆秀梅
Original assignee: SHENTUO STANDARD PARTS CO Ltd PINGDINGSHAN CITY
Current assignee: SHENTUO STANDARD PARTS CO Ltd PINGDINGSHAN CITY
Priority date: 2002-03-12
Filing date: 2002-03-12
Publication date: 2003-02-19
Anticipated expiration: 2012-03-12

Abstract

The utility model relates to a self-locking thread, which is characterized in that the improvement is only carried out on the thread root based on the basic parameters of the regular thread, namely the absolute value of included angle Theta between the root plain line and the thread axis along the section of thread axis is 30 degree to 45 degree and the thread root inclined to the top of regular thread is formed by the root plain line along the spiral direction. The utility model has the advantages that the clearance between thread root and thread top can be eliminated when connecting with the relevant regular thread, the clamping load of whole thread is distributed evenly; the self-locking performance is improved remarkably for application in the machinery field with stronger shock and vibration strength.

Description

Locking self-locking thread

Technical field

The utility model relates to a kind of self-locking thread, and particularly a kind of the utilization at the bottom of the tooth improved clamping force with crest in the process of screwing, and makes the uniform locking self-locking thread of load allocating.

Background technique

Connect regular screw threads after fastening under the effect of alternate load, impulsive load, loosening phenomenon takes place inevitably.The solution of facing this problem roughly has following several and existence deficiency:

1, nut and screw rod weldering is dead, disposable use, this method is used in equipment, the parts scope that mustn't overhaul usually, and its life-span can not be reused with the working life of equipment, parts.

2, be processed into disconnected screw thread along the line at nut inner thread, load the volution spring in this one, can make plain bolt keep permanent elasticity tightening force like this, but its difficulty of processing is big, installation efficiency is low, and processing, manufacture cost are also higher.

3, roller is contained in the screw slot of the direction that parallels to the axis, behind the nut tightening, can not be instead, the connecting mode that screws of this nut can only disposablely use, and its difficulty of processing is bigger, and cost is also higher.

4, install an isometrical wing nut additional in nut, when screwing, wing nut pressurized and deforming reaches locking purpose.It is bigger that this nut relates to difficulty of processing too, the cost problem of higher.

Summary of the invention

The purpose of this utility model be exactly to provide a kind of simple shape, must not annex, can reuse and have the locking self-locking thread of locking self-locking property.For achieving the above object, the technical solution of the utility model is achieved in that thread profile is 60 °, and the symmetrical line of thread profile and axis of thread angle are 90 °.When being internal thread, the crest width of screw thread path is 1/4 of a pitch, and when being outside thread, the crest width of Major Diam is 1/8 of a pitch.The plain line parallel of crest is in the axis of thread, and the original triangle height is a pitch

Plain line is 30 °～45 ° with the angle theta absolute value of the axis of thread at the bottom of the tooth that produces along axis of thread section, surrounds Bottom of Thread by element line at the bottom of the tooth along Hand of spiral.At the bottom of the tooth angle theta of the plain line and the axis of thread be on the occasion of or negative value.

When the utility model connected with respective threads, under the effect of moment of torsion, joining regular screw threads crest imposed on pressure P of Bottom of Thread, produces two component P simultaneously ₁With P ₂Component P ₁Be parallel to the axis of thread, a side of each thread profile that matches is combined closely; Component P ₂Perpendicular to the axis of thread, regular screw threads crest and Bottom of Thread are closely contacted, eliminate the gap between Bottom of Thread and the regular screw threads crest.At component P ₁, P ₂Double action under, improve the screw thread clamping force, and make load allocating even, be not easy to produce laterally and move, its locking self-locking property is connected with than regular screw threads and significantly improves.Be applicable to the bigger mechanical fields of ocsillator strenght such as mine, engineering machinery, automobile, train.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model and corresponding scyewed joint schematic representation.

Fig. 3 is the utility model and corresponding scyewed joint enlarged diagram.

Fig. 4 is this real new embodiment 1 schematic representation.

Fig. 5 is these real new embodiment 2 schematic representation.

Fig. 6 is these real new embodiment 3 schematic representation.(model utility reference character)

1 thread profile, 2 Bottom of Thread, 3 crests

4 tooth form symmetrical line, 5 original triangle height, 6 regular screw threads crests

8 thread grooves, 9 axis of thread parallel lines at the bottom of the 7 regular screw threads teeth

Embodiment

With reference to Fig. 1, Fig. 2, Fig. 3.Locking self-locking thread promptly can be outside thread, also can be internal thread.Its thread profile is 60 ° for 1 jiao, the symmetrical line 4 and the axis of thread angle of thread profile are 90 °, when being internal thread, crest 3 width of screw thread path are 1/4 of pitch, when being outside thread, crest 3 width of Major Diam are 1/8 of pitch, the plain line parallel of crest is in the axis of thread, and original triangle height 5 is a pitch

Plain line 2 is 30 °～45 ° with the angle theta absolute value of the axis of thread at the bottom of the tooth that produces along axis of thread section, surrounds Bottom of Thread by plain line at the bottom of the tooth 2 along Hand of spiral.At the bottom of the tooth angle theta of plain line 2 and the axis of thread be on the occasion of or negative value.(do not show the axis of thread in the drawings, and show with 9 generations of axis of thread parallel lines).

With reference to Fig. 4.This is the utility model embodiment 1 schematic representation.Angle theta=35 of plain line 2 and the axis of thread ° at the bottom of the tooth contact with the Bottom of Thread that element line 2 at the bottom of the tooth surrounds with corresponding connection screw thread 10 of the present utility model, regular screw threads crest 6, and under the effect of moment of torsion, the component P of parallel thread axis ₁With with component P perpendicular to the axis of thread ₂It is even to make whole screw thread clamp load allocating, is difficult for producing laterally moving, and when standing bigger shock and vibration, has good locking self-locking property.

With reference to Fig. 5.This is the utility model embodiment 2 schematic representation.Angle theta=45 of plain line 2 and the axis of thread ° at the bottom of the tooth, the regular screw threads crest 6 of corresponding connection screw thread 10 with the utility model contacts with the Bottom of Thread that plain line 2 at the bottom of the tooth surrounds, under the effect of moment of torsion, the regular screw threads crest imposes on power P of Bottom of Thread, and power P produces two component P ₁, P ₂, thread profile one side is closely cooperated.Because the angle of angle theta is bigger than normal, therefore locking self-locking property is not as embodiment 1, but its applicable impact, less than normal, dismounting equipment or the parts frequently of vibration.

With reference to Fig. 6.This is the utility model embodiment 3 schematic representation.Angle theta=30 °.When regular screw threads crest 6 with after Bottom of Thread contacts, and under the effect of moment of torsion, locking preferably self-locking performance is arranged, embodiment 1 relatively, shock resistance, vibration performance are strong partially, but also applicable impulsive load small device.

The absolute value of the angle theta that the utility model is mentioned is more than 30 °, and below 45 °, its self-locking anti-loosening property can be different because of the variation of angle.

Connect with regular screw threads at the utility model, if cooperates with common outside thread, screw tap machining internal thread that then must be special, as if with common screw-internal thread fit, flat die roll threading that then must be special.

Claims

1, a kind of locking self-locking thread, its thread profile (1) angle is 60 °, the symmetrical line of thread profile (4) is 90 ° with axis of thread angle, when being internal thread, the crest of screw thread path (3) width is 1/4 of a pitch, and when being outside thread, the crest of Major Diam (3) width is 1/8 of a pitch, the plain line parallel of crest is in the axis of thread, and the original triangle height is a pitch

, it is characterized in that: plain line (2) is 30 °～45 ° with the angle theta absolute value of the axis of thread at the bottom of the tooth that produces along axis of thread section, surrounds Bottom of Thread by plain line (2) at the bottom of the tooth along Hand of spiral.

2, locking self-locking thread as claimed in claim 1 is characterized in that: at the bottom of the tooth angle theta of plain line (2) and the axis of thread on the occasion of or negative value.