CN215183355U

CN215183355U - Push-pull electromagnet

Info

Publication number: CN215183355U
Application number: CN202120901752.0U
Authority: CN
Inventors: 钟鹭峰; 叶章群; 章慧平; 郑挺; 尧晶
Original assignee: Xiamen Linghui Medical Technology Co ltd
Current assignee: Linghui Medical Technology Wuhan Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-12-14
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a plug-type electro-magnet, which comprises an outer shell body, coil axle sleeve and iron core push rod, the coil axle sleeve is installed in the shell body, be equipped with the start winding coil on the coil axle sleeve and keep the winding coil, be formed with axial iron core push rod installation cavity in the coil axle sleeve, iron core push rod activity is inserted in iron core push rod installation cavity with the ground adaptation, and when start winding coil and/or keep the winding coil to get electricity and produce magnetic field, the iron core push rod can be by the actuation under magnetic force and relative coil axle sleeve inwards indent form indentation motion state, and be equipped with a normally closed switch structure on the shell body, start winding coil on normally closed switch structure and the coil axle sleeve concatenates, and normally closed switch structure is configured to can trigger and form by the iron core push rod under the indentation motion state and open circuit and then make start winding coil lose electricity. The utility model discloses whole wiring structure is comparatively simple, and production is convenient, is favorable to improving assembly efficiency and reduction in production cost.

Description

Push-pull electromagnet

Technical Field

The utility model relates to an electro-magnet technical field, concretely relates to plug-type electro-magnet.

Background

Chinese document CN2679808 (application date: 26/02/2004) discloses a dc electromagnet fast pushing device, which is a one-way fast electromagnet pushing rod device suitable for fast pushing or fast returning of an actuator made of a dc electromagnet, a housing of the pushing device has a hollow inner cavity, a holding coil is arranged at the upper part of the inner cavity of the housing, a starting coil is arranged at the lower part of the holding coil, the two coils have the same inner cavity, the upper and lower cavities are aligned and matched, an iron core is arranged in the inner cavities of the two coils, a pushing rod is arranged at the upper part of the iron core, an electric control box is arranged at the lower part of the housing, and the output end of the electric control box is electrically connected with the holding coil and the starting coil. The device is a one-way quick pushing device with high pushing or returning speed, electricity saving during working and long service life; the number of turns of the starting coil is larger than that of turns of the holding coil, and the iron core is overlapped with the longitudinal center of the push rod. The positive end of the holding coil is electrically connected with the negative end of the starting coil through a normally closed contact of a relay J4, the negative end of the holding coil is electrically connected with the positive end of the starting coil through a normally closed contact of an electric appliance J3, a piezoresistor is connected between the positive end and the negative end of the holding coil, a normally open contact of the relay J2 and a freewheeling diode are connected in series and then are also connected between the positive end and the negative end of the holding coil, and a piezoresistor and a freewheeling diode are connected between the positive end and the negative end of the starting coil; after current is electrified, the relay J acts, J1 and J2 are simultaneously closed, J3 and J4 are simultaneously disconnected, the holding coil and the starting coil are simultaneously electrified to generate large driving force F (F1 + F2), F is greatly larger than external acting force, us pole can complete pushing in a short time, after about 20ms, the starting coil stops working, the holding coil works, the force of the iron core and the pushing push rod is slightly larger than external resistance, namely, the force required by clamping an external workpiece, and the starting coil stops working and continues current. When the power is cut off, the relay J loses power, the relay J1 and the relay J2 are disconnected, the relay J3 and the relay J4 are closed, the number of turns of the holding coil is small, phi 1 is less than phi 2, opposite magnetic fields are generated in the two coils, F2 is greater than F1, the iron core returns quickly, and the push rod also returns quickly. However, the overall circuit wiring structure of the electromagnet is complex, the production efficiency is affected, and the production cost is not reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a plug-type electro-magnet, it mainly solves have its whole circuit wiring structure of electro-magnet of start coil and holding coil comparatively complicated now, is unfavorable for reduction in production cost's technical problem.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

the utility model provides a plug-type electro-magnet, which comprises an outer shell body, coil axle sleeve and iron core push rod, the coil axle sleeve is installed in the shell body, be equipped with start winding coil and hold the winding coil on the coil axle sleeve, be formed with axial iron core push rod installation cavity in the coil axle sleeve, iron core push rod activity is inserted in iron core push rod installation cavity with the ground adaptation, and when start winding coil and/or hold the winding coil and get electric and produce magnetic field, the iron core push rod can be by the actuation under magnetic force and inwards retract relative coil axle sleeve and form indentation motion state, and be equipped with a normally closed switch structure on the shell body, normally closed switch structure concatenates with the start winding coil on the coil axle sleeve, and normally closed switch structure is configured to can be triggered by the iron core push rod under the indentation motion state and form and open circuit and then make start winding coil lose electricity.

Further, iron core push rod one end forms the conflict effect end that can act on normally closed switch structure and make normally closed switch structure open circuit, and the other end wears out the shell body and forms push-and-pull action end.

Further, normally closed switch structure sets up in outer casing bottom and corresponds the setting with the conflict effect terminal of iron core push rod, normally closed switch structure includes the switch housing, inside static contact and the moving contact that sets up relatively that is equipped with of switch housing, and be equipped with between moving contact and the switch housing and act on the moving contact and make the first elasticity that the moving contact switches on with the static contact closure reset, and be connected with one on the moving contact and wear out the switch housing and correspond the insulating ejector pin that sets up with the conflict effect terminal of iron core push rod, insulating ejector pin is configured to can drive moving contact and static contact separation disconnection by the conflict effect terminal triggering of the iron core push rod under the relative shell body under the inside indentation state.

Further, the first elastic reset piece is a compression spring.

Further, be connected with the second elasticity piece that resets between iron core push rod and the shell body, when start winding coil and hold winding coil lose the electricity, the iron core push rod can outwards stretch out and then form the motion state of stretching out relatively the coil shaft sleeve automatically under the spring action of second elasticity piece that resets.

Furthermore, the second piece that resets is compression spring, and compression spring one end is connected on the push-and-pull action of iron core push rod is served, and the other end is connected on the shell body.

Furthermore, a rubber dustproof sleeve which can be folded and stretched is connected between the push-pull action end of the iron core push rod and the outer shell.

Furthermore, a threaded connecting column convenient for connecting an external component is arranged at the push-pull action end of the iron core push rod.

Further, the operating current of the start winding coil is configured to be larger than the operating current of the hold winding coil.

The technical scheme has the following advantages or beneficial effects:

in the push-pull electromagnet, because the starting winding coil and the retaining winding coil are wound on the coil shaft sleeve, when the push-pull electromagnet is initially electrified, the starting winding coil and the retaining winding coil are simultaneously electrified and generate a magnetic field, the iron core push rod is retracted inwards relative to the coil shaft sleeve under the action of magnetic force, and after the iron core push rod is retracted in place, the iron core push rod can trigger the normally closed switch structure which is arranged on the outer shell and is connected with the starting winding coil in series, so that the normally closed switch structure forms an open circuit, the starting winding coil can automatically lose electricity and does not work, at the moment, the retaining winding coil is electrified, so that the iron core push rod can continuously keep the retracted state, the power failure of the starting winding coil can effectively reduce the heating problem of the coil, the possibility of burning out of the electromagnet is effectively reduced, the service life of the push-pull electromagnet is prolonged, and the whole wiring structure of the push-pull electromagnet is simpler, the production is convenient, and the assembly efficiency is improved and the production cost is reduced.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a structural sectional view of an embodiment of the present invention.

Description of reference numerals:

1. the switch comprises an outer shell, 2, a coil shaft sleeve, 3, an iron core push rod, 4, a normally closed switch structure, 5, a second elastic reset piece, 6, a rubber dustproof sleeve, 21, an iron core push rod installation cavity, 31, an abutting action end, 32, a push-pull action end, 41, a switch shell, 42, a static contact, 43, a moving contact, 44, a first elastic reset piece, 45, an insulating ejector rod, 321 and a threaded connection column.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Please refer to fig. 1 and fig. 2, an embodiment of the present invention provides a push-pull type electromagnet, which comprises an outer shell 1, a coil shaft sleeve 2 and an iron core push rod 3, the coil shaft sleeve 2 is installed in the outer shell 1, a start winding coil and a hold winding coil are arranged on the coil shaft sleeve 2, an axial iron core push rod installation cavity 21 is formed in the coil shaft sleeve 2, the iron core push rod 3 is movably inserted in the iron core push rod installation cavity 21 in a matching manner to form a push-pull action execution structure, and when the start winding coil and/or the hold winding coil are powered to generate a magnetic field, the iron core push rod 3 can be attracted under the action of magnetic force and inwardly retracted relative to the coil shaft sleeve 2 to form a retracted motion state, and a normally closed switch structure 4 is arranged on the outer shell 1, the normally closed switch structure 4 is serially connected with the start winding coil on the coil shaft sleeve 2, and the normally closed switch structure 4 is configured to be triggered by the iron core push rod 3 in the retracted motion state to form an open circuit and further to enable the start motion state The winding coil loses power. It can be understood that, in this embodiment, because the start winding coil and the hold winding coil are wound on the coil shaft sleeve 2, when the initial power is on, the start winding coil and the hold winding coil are simultaneously powered on and generate a magnetic field, the iron core push rod 3 retracts inwards relative to the coil shaft sleeve 2 under the action of magnetic force, and after the iron core push rod 3 retracts in place, the iron core push rod 3 can trigger the normally closed switch structure 4 which is arranged on the outer shell 1 and is connected in series with the start winding coil, so that the normally closed switch structure 4 forms a circuit break, the start winding coil can automatically lose power and does not work, at this time, the hold winding coil is powered on, so that the iron core push rod 3 can continue to maintain the retracted state, and the power failure of the start winding coil can effectively reduce the problem of coil heating, effectively reduce the possibility of electromagnet burnout, improve the service life of the electromagnet, and the overall wiring structure of the push-pull electromagnet is simpler, the production is convenient, and the assembly efficiency is improved and the production cost is reduced.

Referring to fig. 1 and 2, in a preferred embodiment, one end of the iron core push rod 3 forms an interference end 31 capable of acting on the normally closed switch structure 4 and breaking the normally closed switch structure 4, and the other end penetrates through the outer shell 1 to form a push-pull action end 32. In one preferred embodiment, preferably, the normally closed switch structure 4 is disposed at the bottom of the outer casing 1 and is disposed corresponding to the abutting end 31 of the iron core push rod 3, the normally closed switch structure 4 includes a switch casing 41, a fixed contact 42 and a movable contact 43 that are disposed opposite to each other are disposed inside the switch casing 41, a first elastic reset member 44 that can act on the movable contact 43 and make the movable contact 43 and the fixed contact 42 closed and conducted is disposed between the movable contact 43 and the switch casing 41, and an insulating push rod 45 that penetrates through the switch casing 41 and is disposed corresponding to the abutting end 31 of the iron core push rod 3 is connected to the movable contact 43, and the insulating push rod 45 is configured to be triggered by the abutting end 31 of the iron core push rod 3 in an inward retracting state relative to the outer casing 1 to drive the movable contact 43 to be separated from the fixed contact 42. In this embodiment, the first elastic restoring member 44 is preferably a compression spring. It can be understood that, under the normal state, the movable contact 43 in the normally closed switch structure 4 can be abutted together with the fixed contact 42 to form a conducting state under the elastic force action of the first elastic reset piece 44, and when the start winding coil and the holding winding coil are electrified, the iron core push rod 3 retracts inwards relative to the coil shaft sleeve 2 under the magnetic force action, and after retracting in place, the abutting end 31 at the inner end of the iron core push rod 3 can push against the insulating push rod 45 to move and push the movable contact 43 away, so that the normally closed switch structure 4 forms an open circuit state, and further automatically makes the start winding coil lose electricity and not work.

Referring to fig. 1 and 2, in a preferred embodiment, a second elastic reset element 5 is connected between the iron core push rod 3 and the outer shell 1, and when the start winding coil and the hold winding coil are de-energized, the iron core push rod 3 can automatically extend outward relative to the coil sleeve 2 under the elastic force of the second elastic reset element 5 to form an extending motion state. In this embodiment, the second elastic restoring member 5 is preferably a compression spring, one end of the compression spring is connected to the pushing and pulling end 32 of the iron core push rod 3, and the other end of the compression spring is connected to the outer casing 1.

Referring to fig. 1 and 2, in a preferred embodiment, a foldable and retractable rubber dust-proof sleeve 6 is connected between the push-pull end 32 of the iron core push rod 3 and the outer shell 1.

Referring to fig. 1 and 2, in a preferred embodiment, a screw connection post 321 is disposed on the push-pull end 32 of the iron core push rod 3 for connecting external components.

Referring to fig. 1 and 2, in a preferred embodiment, the operating current of the start winding coil is configured to be greater than the operating current of the hold winding coil.

In addition, can be in the fixed copper sheathing that sets up in the iron core push rod installation cavity 21 of coil axle sleeve 2, and iron core push rod 3 adaptation is movably inserted and is established in the copper sheathing, because the copper sheathing has self-lubricating function, consequently, iron core push rod 3 can be very smoothly in the copper sheathing inside and outside concertina movement, both can guarantee the response speed of electro-magnet, also can reduce the friction of iron core push rod 3 simultaneously and generate heat the scheduling problem, can provide the operating stability of electro-magnet.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and therefore, all other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present invention.

Claims

1. A push-pull electromagnet characterized in that: including shell body (1), coil axle sleeve (2) and iron core push rod (3), install in shell body (1) coil axle sleeve (2), be equipped with start winding coil and hold the winding coil on coil axle sleeve (2), be formed with axial iron core push rod installation cavity (21) in coil axle sleeve (2), iron core push rod (3) adaptation ground activity is inserted and is established in iron core push rod installation cavity (21), and when start winding coil and/or hold the winding coil and get electric and produce magnetic field, iron core push rod (3) can be by the actuation and relative coil axle sleeve (2) inwards retract form the indentation motion state under magnetic force, and be equipped with a normally closed switch structure (4) on shell body (1), normally closed switch structure (4) concatenate with the start winding coil on coil axle sleeve (2), and normally closed switch structure (4) are configured to form the open circuit and then make start winding coil lose electricity by iron core push rod (3) under the indentation motion state trigger.

2. A push-pull electromagnet according to claim 1, characterized by: one end of the iron core push rod (3) forms a contact action end (31) which can act on the normally closed switch structure (4) and make the normally closed switch structure (4) open, and the other end penetrates out of the outer shell (1) to form a push-pull action end (32).

3. A push-pull electromagnet according to claim 2, characterized in that: the normally closed switch structure (4) is arranged at the bottom of the outer shell (1) and is arranged corresponding to the abutting action end (31) of the iron core push rod (3), the normally closed switch structure (4) comprises a switch shell (41), a static contact (42) and a moving contact (43) which are oppositely arranged are arranged in the switch shell (41), a first elastic reset piece (44) which can act on the moving contact (43) and can close and conduct the moving contact (43) and the static contact (42) is arranged between the moving contact (43) and the switch shell (41), and the moving contact (43) is connected with an insulating ejector rod (45) which penetrates out of the switch shell (41) and is arranged corresponding to the abutting action end (31) of the iron core push rod (3), and the insulating ejector rod (45) is configured to be triggered by the abutting action end (31) of the iron core push rod (3) in an inward retraction state relative to the outer shell (1) so as to drive the moving contact (43) to be separated from the static contact (42) and disconnected.

4. A push-pull electromagnet according to claim 3, characterized by: the first elastic return member (44) is a compression spring.

5. A push-pull electromagnet according to claim 1, characterized by: be connected with second elasticity between iron core push rod (3) and shell body (1) and reset piece (5), when the start winding coil with keep winding coil to lose the electricity, iron core push rod (3) can outwards stretch out and then form the motion state of stretching out relatively coil axle sleeve (2) automatically under the spring action of second elasticity reset piece (5).

6. A push-pull electromagnet according to claim 5, wherein: the second elastic reset piece (5) is a compression spring, one end of the compression spring is connected to the push-pull action end (32) of the iron core push rod (3), and the other end of the compression spring is connected to the outer shell (1).

7. A push-pull electromagnet according to claim 1, characterized by: a rubber dustproof sleeve (6) which can be folded and stretched is connected between the push-pull action end (32) of the iron core push rod (3) and the outer shell (1).

8. A push-pull electromagnet according to claim 1, characterized by: a thread connecting column (321) which is convenient for connecting external components is arranged on the push-pull action end (32) of the iron core push rod (3).

9. A push-pull electromagnet according to any one of claims 1 to 8, wherein: the operating current of the start winding coil is configured to be larger than the operating current of the hold winding coil.