CN108526856B

CN108526856B - Stress-free operating device for conductive hairspring

Info

Publication number: CN108526856B
Application number: CN201810195858.6A
Authority: CN
Inventors: 段荣; 刘宇轩; 于得涛; 余正海; 董清宇; 胡玉龙
Original assignee: China Aerospace Times Electronics Corp
Current assignee: China Aerospace Times Electronics Corp
Priority date: 2018-03-09
Filing date: 2018-03-09
Publication date: 2020-02-11
Anticipated expiration: 2038-03-09
Also published as: CN108526856A

Abstract

The invention discloses a stress-free operating device of a conductive hairspring, which comprises an operating substrate, a left claw hook, a middle claw hook, a right claw hook, the conductive hairspring and a moving mechanism, wherein the lowest ends of the left claw hook, the middle claw hook and the right claw hook are L-shaped, the three L-shaped claw hooks are positioned on the same plane, the left claw hook and the right claw hook are fixedly connected to the bottom of the operating substrate, the directions of the two claw hooks are consistent with the inserting direction, and the distance between the left claw hook and the right claw hook is matched with the distance between two end points of the conductive hairspring; the middle claw hook is fixedly connected to the bottom of the moving mechanism and can move back and forth along with the moving mechanism. When the three-jaw mechanism operates the conductive hairspring, the conductive hairspring is only subjected to the uplifting force vertical to the plane direction of the conductive hairspring, and no component force exists in the direction parallel to the plane direction of the conductive hairspring, so that the conductive hairspring cannot cause any elastic deformation, the conductive hairspring can always keep the original shape, the stress-free operation of the conductive hairspring is realized, and the generation of internal stress and the interference moment on a meter are avoided.

Description

Stress-free operating device for conductive hairspring

Technical Field

The invention relates to a stress-free operating device of a conductive balance spring, and belongs to the field of instrument and meter assembly.

Background

The conductive hairspring is a special wire in an inertial instrument, and has the function of realizing the electric connection between a fixed part and a movable part and providing electric energy input and signal output for the internal movable part. In addition to fulfilling the function of transmitting current, conductive hairsprings are also required to be thin and soft in order to minimize disturbing moments on internal moving parts. During assembly, the two ends of the conductive balance spring are respectively fitted into and welded to the two terminals of the two parts (the fixed part and the movable part).

Currently, both the assembly and the welding of conductive hairsprings are done manually. Because of their extreme fineness, skilled personnel can only perform various manipulations of the conductive balance spring using tweezers under a microscope. For example, a conductive balance spring is held by tweezers and examined under a microscope, and the conductive balance spring is held by the tweezers and placed on the upper end of the terminal; when the conductive hairspring is accurately positioned before welding, the two fine ends of the conductive hairspring can only be respectively moved into specified welding areas with extremely small ranges by using the tip of a nipper to position the conductive hairspring. Because the conductive hairspring is thin and soft, the conductive hairspring is easy to elastically deform or even permanently deform due to the mechanical clamping; in addition, when any one of the two end points of the conductive balance spring is pushed respectively to realize accurate positioning, the other end point is still due to the existence of friction force, and the distance between the two end points of the conductive balance spring deviates from the original value, namely the shape of the conductive balance spring changes and deviates from the natural state to generate internal stress, and the internal stress can cause interference torque to the instrument and influence the accuracy of the instrument.

How to keep the conductive hairspring in the original shape all the time in the process of operating the conductive hairspring, avoid generating internal stress and realize stress-free operation is the problem to be solved in the field.

Disclosure of Invention

The technical problem solved by the invention is as follows: in order to overcome the defects of the prior art, the stress-free operating device for the conductive hairspring is provided, when the device is operated and installed, the conductive hairspring is enabled to always keep the original shape, and the generation of internal stress and the interference torque to an instrument are avoided.

The technical solution of the invention is as follows:

a stress-free operating device for a conductive hairspring comprises an operating base plate, a left claw hook, a middle claw hook, a right claw hook, the conductive hairspring and a moving mechanism, wherein the lowest ends of the left claw hook, the middle claw hook and the right claw hook are L-shaped, the three L-shaped claw hooks are positioned on the same plane, the left claw hook and the right claw hook are fixedly connected to the bottom of the operating base plate, the directions of the two claw hooks are consistent with the inserting direction, and the distance between the left claw hook and the right claw hook is matched with the distance between two end points of the conductive hairspring; the middle claw hook is fixedly connected to the bottom of the moving mechanism and can move back and forth along with the moving mechanism.

The moving mechanism can drive the middle claw hook to move back and forth through swinging or linear motion.

The moving mechanism comprises an electromagnet seat, a swinging rod, a rotating shaft, a sucker, an electromagnet and a reset spring, the electromagnet seat is fixedly connected to the operating base plate, one end of the swinging rod is fixedly connected to the electromagnet seat, the other end of the swinging rod can rotate around the rotating shaft, the sucker, the electromagnet and the reset spring are fixedly connected to the swinging rod, and the swinging rod is controlled to drive the middle claw hook to move back and forth through switching on or off the electromagnet.

When the electromagnet is electrified, the sucker is attracted to the direction of the electromagnet under the action of magnetic force to drive the swinging rod to rotate and drive the middle claw hook to move backwards; after the electromagnet is powered off, the swinging rod returns under the action of the return spring, and the middle claw hook moves forwards and returns.

The distance of the forward and backward movement is limited by the jackscrew, so that the conductive hairspring and the hairspring groove are not interfered in the swinging direction.

Compared with the prior art, the invention has the beneficial effects that:

when the three-jaw mechanism operates the conductive hairspring, the conductive hairspring is only subjected to the uplifting force vertical to the plane direction of the conductive hairspring, and no component force exists in the direction parallel to the plane direction of the conductive hairspring, so that the conductive hairspring cannot cause any elastic deformation, the conductive hairspring can always keep the original shape, the stress-free operation of the conductive hairspring is realized, and the generation of internal stress and the interference moment on a meter are avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of three grabbers of the present invention;

fig. 3 is a process of the invention in which an electrically conductive balance spring is picked up in its magazine;

fig. 4 is an assembled relationship of the conductive balance spring of the present invention with a terminal when welded in a meter;

fig. 5 is a process of withdrawing the three-jaw mechanism of the present invention from the meter.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

A stress-free operating device of a conductive hairspring is shown in figure 1 and comprises an operating base plate, a left claw hook 1, a middle claw hook 2, a right claw hook 3, a conductive hairspring 4 and a moving mechanism, wherein the lowest ends of the left claw hook 1, the middle claw hook 2 and the right claw hook 3 are L-shaped, the three L-shaped claw hooks are positioned on the same plane, the left claw hook 1 and the right claw hook 3 are fixedly connected to the bottom of the operating base plate, the directions of the two claw hooks are consistent with the inserting direction, and the distance between the left claw hook 1 and the right claw hook 3 is matched with the distance between two end points and two grooves of the hairspring; the middle claw hook 2 is fixedly connected to the bottom of the moving mechanism and can move back and forth along with the moving mechanism.

The electromagnet seat is fixedly connected to the operation substrate, the rotating shaft 6 is fixed to the electromagnet seat, the swinging rod 5 is connected to the rotating shaft 6 and can rotate around the rotating shaft 6, the sucking disc 7, the electromagnet 8 and the reset spring 9 are fixedly connected to the swinging rod 5, and the swinging rod 5 is controlled to drive the middle claw hook 2 to move back and forth through switching on and off the electromagnet 8.

When the electromagnet 8 is electrified, the sucker 7 is attracted to the direction of the electromagnet 8 under the action of magnetic force to drive the swinging rod 5 to rotate and drive the middle claw hook 2 to move backwards; after the electromagnet 8 is powered off, the swinging rod 5 returns under the action of the return spring 9, and the middle claw hook 2 moves forwards and returns.

Fig. 1 shows an electrically conductive balance spring operating mechanism with three claws at the bottom, hereinafter referred to as a "three-claw mechanism", which is fixed on a three-axis displacement table and can move three-dimensionally as desired under software control. In the enlarged schematic view (fig. 2) of the three-jaw hook, the left jaw hook 1 and the right jaw hook 3 are fixed jaw hooks, and the middle jaw hook 2 is a movable jaw hook capable of swinging back and forth. The middle claw hook 2 is connected to the swing lever 5. The swing lever 5 is rotatable about a rotation shaft 6. An electrician pure iron sucker 7 is fixed on the swinging rod 5, when the electromagnet 8 is electrified, the sucker 7 is attracted to the direction of the electromagnet 8 under the action of magnetic force, the swinging rod 5 is driven to rotate, and the middle claw hook 2 is driven to move backwards. After the electromagnet 8 is powered off, the swinging rod 5 returns under the action of the return spring 9, and the middle claw hook 2 moves forwards and returns.

As shown in fig. 3, initially, conductive balance spring 4 is placed on supporting surface 11 of magazine 10, the conductive balance spring is extremely fine and has a width of micrometer, the three-jaw mechanism moves to the upper side of conductive balance spring 4 under the control of the three-axis displacement table, electromagnet 8 is powered on at this time, middle jaw hook 2 moves backward, then the three-jaw mechanism continues to descend for a certain height, the three jaws fall into avoiding groove 12 and are located at a position (fig. 3a) which is slightly left below conductive balance spring 4, electromagnet 8 is powered off at this time, middle jaw hook 2 returns to move forward (fig. 3b), then the three-jaw mechanism moves rightward integrally, so that the three jaws are all right below conductive balance spring 4 (fig. 3c) and then move upward, and at this time, the three jaws lift up conductive balance spring 4, so as to pick up the conductive balance spring.

When the conductive balance spring is fitted to the meter, the three claws carry conductive balance spring 4 to the upper side of the meter, and the positional relationship between the two end points of conductive balance spring 4 and wire connecting terminal 13 on the meter is shown in fig. 4. When the three-jaw mechanism moves down to a certain height, the two ends of the conductive hairspring 4 respectively fall into the grooves 14 at the upper ends of the two connecting terminals 13, and then move down continuously, so that the conductive hairspring 4 is in contact with the groove bottoms of the two grooves 14 and the supporting cushion block 15, the support of the conductive hairspring 4 is replaced by the three points and does not move down along with the three-jaw mechanism, and the conductive hairspring 4 is placed in the grooves 14.

The three-jaw hook continues to move downwards and stops after being separated from the conductive balance spring 4 (fig. 5a), then the electromagnet 8 is electrified, the middle jaw hook 2 moves backwards (fig. 5b) to ensure that the middle jaw hook does not interfere with the groove of the conductive balance spring, the three-jaw mechanism moves leftwards integrally (fig. 5c) to ensure that the middle jaw hook does not interfere with the groove of the conductive balance spring and then rises to leave, so that the middle jaw hook does not interfere with the conductive balance spring, the assembly before welding of the conductive balance spring 4 is completed, and other parts of the conductive balance spring are in a suspended state after the two ends of the conductive balance spring and the terminal are welded subsequently. In the whole process, the conductive hairspring is only subjected to the uplifting force perpendicular to the plane direction of the conductive hairspring, and no component force is generated in the direction parallel to the plane direction of the conductive hairspring, so that any elastic deformation of the conductive hairspring can not be caused, the conductive hairspring can always keep the original shape of the conductive hairspring, the stress-free operation of the conductive hairspring is realized, the stress-free assembly of the conductive hairspring 4 and two terminals is further realized, and the influence on the precision of the instrument due to the interference moment of the instrument caused by stress is avoided.

The present invention is not limited to the above embodiments, and all modifications, variations, and equivalents of the structure and process steps described in the specification and drawings may be made without departing from the spirit and scope of the present invention.

The absence of a disclosure of the present invention is within the knowledge of a person skilled in the art.

Claims

1. The stress-free operating device of the conductive hairspring is characterized by comprising an operating base plate, a left claw hook (1), a middle claw hook (2), a right claw hook (3), the conductive hairspring (4) and a moving mechanism, wherein the lowest ends of the left claw hook (1), the middle claw hook (2) and the right claw hook (3) are L-shaped, the three L-shaped claw hooks are positioned on the same plane, the left claw hook (1) and the right claw hook (3) are fixedly connected to the bottom of the operating base plate, the directions of the two claw hooks are consistent with the inserting direction, and the distance between the left claw hook (1) and the right claw hook (3) is matched with the distance between two end points of the conductive hairspring (4); the middle claw hook (2) is fixedly connected to the bottom of the moving mechanism and can move back and forth along with the moving mechanism;

the moving mechanism comprises an electromagnet seat, a swinging rod (5), a rotating shaft (6), a sucker (7), an electromagnet (8) and a reset spring (9), the electromagnet seat is fixedly connected to the operating substrate, one end of the swinging rod (5) is fixedly connected to the electromagnet seat, the other end of the swinging rod can rotate around the rotating shaft (6), the sucker (7) and the reset spring (9) are fixedly connected to the swinging rod (5), the electromagnet (8) is connected to the electromagnet seat, and the swinging rod (5) is controlled to drive the middle claw hook (2) to move back and forth by switching on and off the electromagnet (8);

at the beginning, a left claw hook (1), a middle claw hook (2) and a right claw hook (3) move to the upper part of a conductive hairspring (4) under the control of a three-axis displacement table, an electromagnet (8) is electrified, the middle claw hook (2) moves backwards, then the left claw hook (1), the middle claw hook (2) and the right claw hook (3) continuously descend to the position that the three claw hooks fall into an avoidance groove (12) and are positioned at the position which is slightly left below the conductive hairspring (4), the electromagnet (8) is powered off at the moment, the middle claw hook (2) resets and moves forwards, then the three claw hooks integrally move rightwards, the three claw hooks are all positioned under the conductive hairspring (4) and move upwards, and the conductive hairspring (4) is hooked up by the three claw hooks at the moment, so that the conductive hairspring (4) is picked up;

when the conductive hairspring (4) is assembled in an instrument, the three claws move downwards to a certain height to enable two ends of the conductive hairspring (4) to fall into the grooves (14) at the upper ends of the two wiring terminals (13) respectively, and then the three claws move downwards continuously, so that the conductive hairspring (4) is in contact with the groove bottoms of the two grooves (14) and the supporting cushion blocks (15), and the conductive hairspring (4) is placed in the grooves (14); in the whole process, the conductive hairspring is only subjected to the uplifting force perpendicular to the plane direction of the conductive hairspring, elastic deformation is avoided, and stress-free assembly of the conductive hairspring (4) and the two terminals is realized.

2. A conductive balance spring stress-free operation device according to claim 1, wherein the moving mechanism can move the middle catch (2) back and forth by swinging or linear movement.

3. A stress-free operation device of an electric hairspring according to claim 1, wherein when the electromagnet (8) is energized, the suction cup (7) is attracted by the magnetic force in the direction of the electromagnet (8) to rotate the oscillating lever (5) and drive the middle claw hook (2) to move backward; after the electromagnet (8) is powered off, the swinging rod (5) returns under the action of the return spring (9), and the middle claw hook (2) moves forwards and returns.

4. A conductive balance spring stress-free operation device according to claim 1, wherein the distance of forward and backward movement is limited by the crest so as not to interfere with the conductive balance spring (4) and the balance spring groove in the direction of oscillation.