CN101555976B

CN101555976B - Thread rotation stopping mechanism of rotary mechanism

Info

Publication number: CN101555976B
Application number: CN2009101168314A
Authority: CN
Inventors: 杨柳彬; 廖颖; 陈新发
Original assignee: CETC 38 Research Institute
Current assignee: CETC 38 Research Institute
Priority date: 2009-05-22
Filing date: 2009-05-22
Publication date: 2011-04-06
Anticipated expiration: 2029-05-22
Also published as: CN101555976A

Abstract

The invention relates to a thread rotation stopping mechanism of a rotary mechanism, which solves the problem that the supply of rotation stopping force of rotation or continuous rotation at any anglecan not be realized due to the limit of the structure size. The thread rotation stopping mechanism comprises two locking bolts with two sections of threads with the same turning direction, two fixednuts and two movable nuts. The fixed nuts and the movable nuts are respectively matched with the front threads and the rear threads of the locking bolts; the thread pitch of the front threads of the locking bolts is larger than the thread pitch of the rear threads; and when in use, the two fixed nuts are fixedly connected with a rotary structural component respectively. The thread rotation stopping mechanism converts the rotation stopping force into a shearing force of the threads; and only the structural strength of the thread is considered, while the contact surface friction coefficient, thecontact surface area and enough radial thread locking force which are considered for an end-face friction are not taken in to consideration. The thread rotation stopping mechanism provides reliable rotation stopping force, has simple structure and only relates to bolts and nuts, thus being convenient to manufacture and install.

Description

The thread rotation stopping mechanism of rotating mechanism

Technical field

The invention belongs to field of mechanical technique, be applicable to machinery, the rotatable hue angle of electronic product structure and adopt the version of engage thread spline.

Background technology

Traditional rotation angle adjustable mechanism adopts the combination of following dual mode or dual mode to come spline basically:

Method 1, provide axial pressing force by screw thread, rotating mechanism reaches spline by end-face friction.

Method 2, mesh by the end face tooth and to reach spline, spline power is realized by the structural strength of tooth.

The spline power (end-face friction) that employing method 1 provides is determined by 3 factors: screw thread axial pressing force, contact surface friction coefficient, area of contact.Contact surface friction coefficient and area of contact are certain in certain structure, and when the screw thread axial pressing force provides when not being very abundant, the end-face friction that provides can not finely reach the spline effect.The spline power that employing method 2 provides is subjected to the restriction of scantling of structure in this structure, can not reach rotation at any angle or rotation continuously.

Summary of the invention

Can not realize when solving the restriction that is subjected to scantling of structure rotating at any angle or continuously rotation provide spline power problem, the invention provides the thread rotation stopping mechanism that a kind of no-go end face friction force or end face tooth mesh the rotating mechanism of the arbitrarily angled or continuous rotation that reaches rotating mechanism.

The technical solution that realizes above-mentioned purpose is as follows:

The thread rotation stopping mechanism of rotating mechanism comprises two lock bolts with two sections identical screw threads of rotation direction, also comprises two captive nuts and two movement nut, and captive nut and movement nut cooperate with the front threads and the rear threads of lock bolt respectively; The pitch of described lock bolt front threads is greater than the pitch of rear threads;

During use, described two captive nuts captive joint respectively rotational structure spare.

The pitch of described lock bolt front threads is 0.6mm, and the pitch of its rear threads is 0.5mm.

Described two movement nut one side peripheries are connecting locating piece respectively, and locating piece is to captive nut one lateral bending song.

Described lock bolt front threads and rear threads are fine thread.

The present invention realizes that the axial motion of movement nut 2 has 2 kinds of modes: the one, have an axial freedom after 4 assemblings of movement nut 2 and rotational structure spare, and the 2nd, movement nut 2 and rotational structure spare 4 are fixing and stress deformation by rotational structure spare 4 reaches movement nut 2 motion in the axial direction.The position relation of entire mechanism is seen Fig. 1 when rotational structure spare 4 needs to adjust angle, at this moment movement nut 2 is separated with the end face of captive nut 1, this moment, rotational structure spare 4 and two movement nut 2 can rotate freely in the axial direction, that is rotational structure spare 4 can rotate to arbitrarily angled.After angular adjustment is good, lock two lock bolts 3 respectively, because the pitch p1 of the front end screw thread 5 of lock bolt 3 is greater than the pitch p2 of back segment screw thread 6, make movement nut 2 close to captive nut 1, when movement nut 2 with reach locking state after captive nut 1 contacts, the locking state of entire mechanism is seen accompanying drawing 3.

Useful technique effect of the present invention is embodied in the following aspects:

1, the spline power of rotating mechanism of the present invention is converted into the shearing force of screw thread thread, and the prerequisite that rotating mechanism rotates after the spline is that the shearing force of thread is with the thread structural failure;

2, do not need contact surface friction coefficient, contact surface area and the enough axial thread coupling mechanism forces of considering that end-face friction need be considered, only need to consider the structural strength of thread.Adopt the fit of this bolts and nuts, certain screw-threaded coupling power is provided, guarantee the closed contact of two nuts, that is failure-free spline power is provided;

3, this rotation preventive mechanism is simple in structure, only relates to bolts and nuts, makes, installs all very convenient;

4, the circumvolve lock set kit of mode 2 types of describing in this rotation preventive mechanism and the background technology is compared more safe and reliable.

Description of drawings

Fig. 1 is a structural representation of the present invention,

Fig. 2 is a lock bolt structural representation of the present invention,

Fig. 3 locks the back constitution diagram for the present invention,

Fig. 4 is the circumvolve lock set kit cutaway view of vehicle-mounted infrared viewing device,

Fig. 5 is the lateral plan of vehicle-mounted infrared viewing device,

Fig. 6 be the A of Fig. 5 to view,

Fig. 7 is the B-B cutaway view of Fig. 6.

The specific embodiment

Below in conjunction with accompanying drawing, the present invention is done to describe further by embodiment.

Embodiment 1:

Referring to Fig. 1 and Fig. 2, the thread rotation stopping mechanism of rotating mechanism comprises two lock bolts 3 with two sections identical screw threads of rotation direction, also comprise two captive nuts 1 and two movement nut 2, and captive nut 1 and movement nut 2 cooperate with the front threads and the rear threads of lock bolt 3 respectively; The pitch of lock bolt 3 front threads is greater than the pitch of rear threads.

During use, two captive nuts 1 are fixedly mounted on the both sides of rotational structure spare 4 respectively.

As seen from Figure 1, the end face of movement nut 2 and captive nut 1 separates, and this moment, rotational structure spare 4 and two movement nut 2 can rotate freely in the axial direction, that is rotational structure spare 4 can rotate to arbitrarily angled.After angular adjustment is good, lock two lock bolts 3 respectively, because the pitch p1 of the front end screw thread 5 of lock bolt 3 is greater than the pitch p2 of back segment screw thread 6, make movement nut 2 close to captive nut 1, when movement nut 2 with reach locking state after captive nut 1 contacts, the locking state of entire mechanism is seen Fig. 3.

Embodiment 2:

Two movement nut 2 one side peripheries are connecting locating piece respectively, and locating piece is seen Fig. 4 to captive nut 1 one lateral bending songs.The pitch of lock bolt 3 front threads is 0.6mm, and the pitch of its rear threads is 0.5mm; Lock bolt front threads and rear threads are fine thread.

Other structure is with embodiment 1.

During use, be installed on the vehicle-mounted infrared viewing device.In vehicle-mounted infrared viewing device, product is made up of two primary clusterings: the one, and system host 7, it comprises infrared CCD camera 8, infrared light supply 9 and other telecommunication, structure accessory; The 2nd, the rotational structure spare 4 of fixed system main frame, rotational structure spare 4 have the adhesive surface 10 of a gum, by adhesive surface 10 whole vehicle-mounted infrared viewing device are fixed on the shield glass when product is installed.

Because the angle of inclination difference of various shield glasss and the infrared CCD camera 8 of system host 7 need always keep level attitude with infrared light supply 9, this locks problem with regard to relating to the angle of adjusting rotational structure spare 4 and the angular adjustment spline after good.After adjusting angle, rotational structure spare 4 locks problem for solving again, between system host 7 and rotational structure spare 4, increase circumvolve lock set kit, the section-drawing of circumvolve lock set kit as shown in Figure 4, movement nut 2 is fixed on the rotational structure spare 4, captive nut 1 is fixed on the system host 7, and lock bolt 3 is fixed on the locking knob 11.The lateral plan of vehicle-mounted infrared viewing device as shown in Figure 5, Fig. 6 is that the A of Fig. 5 is to view, Fig. 7 is that the B-B of Fig. 6 is to cutaway view, after adjusting the angle of rotational structure spare 4, rotational lock knob 11 makes the end face close contact of movement nut 2 and captive nut 1 reach the rotational lock of rotational structure spare 4 by the 4 axial distortion of rotational structure spare.

Claims

1. the thread rotation stopping mechanism of rotating mechanism, it is characterized in that: comprise two lock bolts with two sections identical screw threads of rotation direction, also comprise two captive nuts and two movement nut, and captive nut and movement nut cooperate with the front threads and the rear threads of lock bolt respectively; The pitch of described lock bolt front threads is greater than the pitch of rear threads, and forms step between front threads section and the rear threads section;

2. the thread rotation stopping mechanism of rotating mechanism according to claim 1, it is characterized in that: the pitch of described lock bolt front threads is 0.6mm, the pitch of its rear threads is 0.5mm.

3. the thread rotation stopping mechanism of rotating mechanism according to claim 1, it is characterized in that: described two movement nut one side peripheries are connecting locating piece respectively, and locating piece is to captive nut one lateral bending song.

4. the thread rotation stopping mechanism of rotating mechanism according to claim 1, it is characterized in that: described lock bolt front threads and rear threads are fine thread.