CN112865022A

CN112865022A - Stall protection device for electromechanical device

Info

Publication number: CN112865022A
Application number: CN202110013272.5A
Authority: CN
Inventors: 程泽毅
Original assignee: Hangzhou Dadu Electromechanical Equipment Co ltd
Current assignee: Hangzhou Dadu Electromechanical Equipment Co ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-05-28

Abstract

The invention relates to the technical field of electromechanical equipment protection, and discloses a stall protection device for electromechanical equipment, which comprises a shell, wherein permanent magnets are fixedly connected to the outer side of the shell, a rotating shaft is movably connected to the inner wall of the middle part of the shell, a coil is fixedly connected to the inner wall of the middle part of the rotating shaft, a ball is movably connected to the inner wall of the middle part of the rotating shaft, a centrifugal groove is formed in the inner wall of the middle part of the ball, a positive plate is fixedly connected to the inner wall of the middle part of the ball, a negative plate is fixedly connected to the inner wall of. This stall protection device for electromechanical device drives the ball through the pivot and moves, and the ball drives the trigger bar motion, and rethread dielectric plate and piezo-resistor's cooperation is used to reach the effect that detects the pivot overspeed, when the pivot has surpassed preset rotational speed, the centripetal force that the ball received is greater than the traction force of spring, and the ball moves to the outside along the centrifugal groove inner wall, thereby triggers piezo-resistor's operating condition.

Description

Stall protection device for electromechanical device

Technical Field

The invention relates to the technical field of electromechanical equipment protection, in particular to a stall protection device for electromechanical equipment.

Background

Along with the continuous improvement of the living standard of people, people have more and more demands on electromechanical equipment in daily life, in the fields of production, processing and the like, a large number of electromechanical equipment are often adopted to carry out various production, processing or monitoring operations, and the advanced electromechanical equipment can greatly improve the labor productivity, reduce the labor intensity, improve the production environment and finish the work which cannot be finished by manpower.

In order to prolong the service life of the electromechanical equipment, the electromechanical equipment is often required to be protected by a protection device, wherein the electromechanical equipment is subjected to stall protection and is not widely applied, however, the conventional protection device is simple in design structure and single in function, and the protection is not timely, not sensitive, so that the protection effect of the electromechanical equipment is poor, and the service life of the equipment is influenced.

Therefore, we propose a stall protection device for electromechanical devices to solve the above problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the stall protection device for the electromechanical equipment, which has the advantages of simple operation and quick response of real-time detection, and solves the problems of single structure and poor protection effect of the traditional equipment.

(II) technical scheme

In order to realize the purposes of simple operation and real-time detection and quick reaction, the invention provides the following technical scheme: the utility model provides a stall protection device for electromechanical device, which comprises an outer shell, shell outside fixedly connected with permanent magnetism piece, shell middle part inner wall swing joint has the pivot, pivot middle part inner wall fixedly connected with coil, pivot middle part inner wall swing joint has the ball, centrifugal groove has been seted up to ball middle part inner wall, ball middle part inner wall fixedly connected with positive plate, ball middle part inner wall fixedly connected with negative plate, ball middle part inner wall fixedly connected with piezo-resistor, centrifugal groove inner wall swing joint has the trigger bar, the dielectric plate of trigger bar middle part inner wall fixedly connected with, the inboard fixedly connected with reset spring of trigger bar, pivot middle part inner wall swing joint has the push rod, push rod outside fixedly connected with leads electrical pillar, pivot middle part inner wall swing joint has sodium azide, pivot middle part inner wall fixedly connected with heating.

Preferably, the inner wall of the middle part of the shell is provided with a movable groove matched with the rotating shaft, the outer side of the shell is fixedly connected with a magnetic seat, and the rotating shaft rotates along the movable groove and the inner wall of the movable groove is smooth.

Preferably, the size of the permanent magnet is larger than that of the rotating shaft, the magnetism of the inner side of the permanent magnet is opposite, the permanent magnet is clamped on the inner side of the magnetic seat, when the coil is in a closed state, induced current is generated under the action of the permanent magnet, so that induced eddy current is generated, an electromagnetic field is generated, and the electromagnetic damping effect is generated between the electromagnetic field of the permanent magnet and the magnetic field of the permanent magnet to block the movement of the rotating shaft.

Preferably, the inner wall of the middle part of the rotating shaft is provided with a groove matched with the push rod, the rotating shaft is made of a non-magnetic-conductive material, the push rod moves outwards under the action of sodium azide to drive the limiting block to move, and the inner wall of the groove is provided with limiting teeth.

Preferably, the ball middle part inner wall is seted up with the movable groove of trigger bar looks adaptation and the inboard fixedly connected with spring of ball, spring and pivot inner wall fixed connection, and the ball receives the pin down under the effect of spring, and when the rotational speed of pivot was too big, the centrifugal force that the ball received was greater than the traction force of spring.

Preferably, the inner side of the return spring is fixedly connected with the inner wall of the centrifugal groove, the size of the return spring is smaller than that of the trigger rod, and the return spring mainly plays a role in returning the trigger rod so as to restore the dielectric plate to the initial position.

Preferably, the size of push rod is less than the size of pivot and the push rod is formed by insulating material and the push rod middle part inner wall offered with the groove of stopper looks adaptation, the outside lateral movement of push rod will lead electrical pillar and coil contact messenger coil to become closed coil, the stopper pop out under the effect of spring and spacing groove joint.

Preferably, the conductive column is arc-shaped, and a certain gap exists between the conductive column and the inner side of the coil, and the conductive column mainly plays a role in closing the coil.

(III) advantageous effects

Compared with the prior art, the invention provides a stall protection device for electromechanical equipment, which has the following beneficial effects:

1. this stall protection device for electromechanical device drives the ball through the pivot and moves, and the ball drives the trigger bar motion, and rethread dielectric plate and piezo-resistor's cooperation is used to reach the effect that detects the pivot overspeed, when the pivot has surpassed preset rotational speed, the centripetal force that the ball received is greater than the traction force of spring, and the ball moves to the outside along the centrifugal groove inner wall, thereby triggers piezo-resistor's operating condition.

2. This stall protection device for electromechanical device, drive the motion of sodium azide through the piece that generates heat, sodium azide drives the push rod operation, rethread stopper uses with the cooperation of leading electrical pillar, thereby reach the effect of stall protection, thereby the push rod moves to the outside and drives and lead electrical pillar motion and make the coil be in complete closure state with the coil laminating, when the pivot is in high-speed moving state, coil and permanent magnetism piece's magnetic pole takes place relative motion, can produce electromagnetic resistance between the two, hinder relative motion, thereby realize the purpose of protection.

Drawings

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

FIG. 2 is a partially enlarged view of the portion A of FIG. 1 according to the present invention;

FIG. 3 is a partially enlarged view of the portion B shown in FIG. 1 according to the present invention;

FIG. 4 is a schematic view of a partially enlarged structure of the portion C in FIG. 1 according to the present invention.

In the figure: 1. a housing; 2. permanent magnet blocks; 3. a coil; 4. a rotating shaft; 5. a ball bearing; 6. a positive plate; 7. a dielectric plate; 8. a trigger lever; 9. a negative plate; 10. a voltage dependent resistor; 11. a return spring; 12. a push rod; 13. a heat block; 14. sodium azide; 15. a limiting block; 16. a conductive post; 17. and (4) centrifuging the tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a stall protection device for an electromechanical device comprises a housing 1, a movable slot adapted to a rotating shaft 4 is formed in the inner wall of the middle portion of the housing 1, a magnetic base is fixedly connected to the outer side of the housing 1, the rotating shaft 4 rotates along the movable slot, the inner wall of the movable slot is smooth, a permanent magnet 2 is fixedly connected to the outer side of the housing 1, the size of the permanent magnet 2 is larger than that of the rotating shaft 4, the inner side of the permanent magnet 2 has opposite magnetism, the permanent magnet 2 is clamped to the inner side of the magnetic base, when a coil 3 is in a closed state, induced current is generated under the action of the permanent magnet 2, so that induced eddy current is generated, an electromagnetic field is also generated, an electromagnetic damping effect is generated by the magnetic field of the permanent magnet 2 to block the movement of the rotating shaft 4, the rotating shaft 4 is movably connected to the inner wall of the middle portion of the, the push rod 12 moves outwards under the action of the sodium azide 14 to drive the limiting block 15 to move, limiting teeth are arranged on the inner wall of the groove, and the inner wall of the middle part of the rotating shaft 4 is fixedly connected with the coil 3;

the inner wall of the middle part of the rotating shaft 4 is movably connected with a ball 5, the inner wall of the middle part of the ball 5 is provided with a movable groove matched with the trigger rod 8, the inner side of the ball 5 is fixedly connected with a spring, the spring is fixedly connected with the inner wall of the rotating shaft 4, the ball 5 is restrained under the action of the spring, when the rotating speed of the rotating shaft 4 is overlarge, the centrifugal force applied to the ball 5 is larger than the traction force of the spring, the inner wall of the middle part of the ball 5 is provided with a centrifugal groove 17, the inner wall of the middle part of the ball 5 is fixedly connected with a positive plate 6, the inner wall of the middle part of the ball 5 is fixedly connected with a negative plate 9, the inner wall of the middle part of the ball 5 is fixedly connected with a piezoresistor 10, the inner wall of the centrifugal groove 17 is movably connected with the trigger rod 8, the, the main function of the return spring 11 is to return the trigger lever 8 so that the dielectric plate 7 is restored to the initial position;

4 middle part inner wall swing joint of pivot has push rod 12, the size of push rod 12 is less than the size of pivot 4 and push rod 12 is formed by insulating material preparation and push rod 12 middle part inner wall offer with the groove of 15 looks adaptations of stopper, push rod 12 moves to the outside and will lead electrical pillar 16 and coil 3 contact messenger coil 3 is closed, stopper 15 pops out under the effect of spring and connects with the spacing groove joint, 12 outside fixedly connected with of push rod leads electrical pillar 16, it has certain clearance to lead electrical pillar 16 and coil 3 inboard for circular-arc and leading electrical pillar 16, it mainly plays 3 closed effects to lead

electrical pillar

16, 4 middle part inner wall swing joint of pivot has

sodium azide

14, 4 middle part inner wall fixedly connected with of pivot generate

heat piece

13, 12 middle part inner wall swing joint of push rod has stopper 15.

The working principle is as follows: when the rotating shaft 4 rotates at a low speed, the centripetal force applied to the ball 5 is smaller than the traction force of the spring, so that the ball 5 cannot move outwards along the inner wall of the centrifugal groove 17, the coil 3 is in an open circuit state, no electric power is generated when the magnetic induction lines are cut, when the rotating shaft 4 exceeds a preset rotating speed, the centripetal force applied to the ball 5 is larger than the traction force of the spring, the ball 5 moves outwards along the inner wall of the centrifugal groove 17, the trigger rod 8 is pressed against the inner wall of the centrifugal groove 17, the reset spring 11 is extruded, the reset spring 11 deflects, the relative area of the positive plate 6 and the negative plate 9 gradually decreases, the voltage between the two polar plates gradually decreases, and when the trigger rod 8 moves to the rightmost end, the voltage between the two polar plates is minimum;

reach piezo-resistor 10's minimum access voltage, the piece 13 that generates heat is electrified out and is produced a large amount of heats, this moment because under the effect of high temperature, sodium azide 14 takes place violent reaction, and produce a large amount of gases, thereby drive push rod 12 to move to the outside, when push rod 12 moves to the maximum position, stopper 15 pops out this moment, with spacing tooth joint, thereby increase push rod 12's stability, thereby because push rod 12 moves to the outside and drive and lead the motion of electrical pillar 16 and laminate with coil 3 and make coil 3 be in complete closure state, when pivot 4 is in high-speed moving state, coil 3 takes place relative motion with the magnetic pole of permanent magnetism piece 2, can produce electromagnetic resistance between the two, hinder relative motion, thereby reach the purpose that the rotational speed that reduces pivot 4 realized protection equipment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A stall protection device for electromechanical device, includes shell (1), its characterized in that: the outer side of the shell (1) is fixedly connected with a permanent magnet (2), the middle inner wall of the shell (1) is movably connected with a rotating shaft (4), the middle inner wall of the rotating shaft (4) is fixedly connected with a coil (3), the middle inner wall of the rotating shaft (4) is movably connected with a ball (5), the middle inner wall of the ball (5) is provided with a centrifugal groove (17), the middle inner wall of the ball (5) is fixedly connected with a positive plate (6), the middle inner wall of the ball (5) is fixedly connected with a negative plate (9), the middle inner wall of the ball (5) is fixedly connected with a piezoresistor (10), the inner wall of the centrifugal groove (17) is movably connected with a trigger rod (8), the middle inner wall of the trigger rod (8) is fixedly connected with a dielectric plate (7), the inner side of the trigger rod (8) is fixedly connected, the inner wall of the middle part of the rotating shaft (4) is movably connected with sodium azide (14), the inner wall of the middle part of the rotating shaft (4) is fixedly connected with a heating block (13), and the inner wall of the middle part of the push rod (12) is movably connected with a limiting block (15).

2. A stall protection device for an electromechanical device according to claim 1, wherein: the inner wall of the middle part of the shell (1) is provided with a movable groove matched with the rotating shaft (4), and the outer side of the shell (1) is fixedly connected with a magnetic seat.

3. A stall protection device for an electromechanical device according to claim 1, wherein: the size of the permanent magnet (2) is larger than that of the rotating shaft (4), the magnetism of the inner side of the permanent magnet (2) is opposite, and the permanent magnet (2) is clamped on the inner side of the magnetic seat.

4. A stall protection device for an electromechanical device according to claim 1, wherein: the inner wall of the middle part of the rotating shaft (4) is provided with a groove matched with the push rod (12), and the rotating shaft (4) is made of a non-magnetic-conductive material.

5. A stall protection device for an electromechanical device according to claim 1, wherein: the inner wall of the middle of the ball (5) is provided with a movable groove matched with the trigger rod (8), the inner side of the ball (5) is fixedly connected with a spring, and the spring is fixedly connected with the inner wall of the rotating shaft (4).

6. A stall protection device for an electromechanical device according to claim 1, wherein: the inner side of the return spring (11) is fixedly connected with the inner wall of the centrifugal groove (17), and the size of the return spring (11) is smaller than that of the trigger rod (8).

7. A stall protection device for an electromechanical device according to claim 1, wherein: the size of the push rod (12) is smaller than that of the rotating shaft (4), the push rod (12) is made of insulating materials, and a groove matched with the limiting block (15) is formed in the inner wall of the middle of the push rod (12).

8. A stall protection device for an electromechanical device according to claim 1, wherein: the conductive post (16) is arc-shaped, and a certain gap is formed between the conductive post (16) and the inner side of the coil (3).