CN213063811U

CN213063811U - Compact electromagnet

Info

Publication number: CN213063811U
Application number: CN202020335801.4U
Authority: CN
Inventors: 桂理; 胡逍宇; 陈荣平; 文辉; 余波; 黄夫龙
Original assignee: Chengdu Wit Electronic Fuel System Co ltd
Current assignee: Chengdu Wit Electronic Fuel System Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2021-04-27
Anticipated expiration: 2030-03-17

Abstract

The utility model provides a compact electromagnet, which comprises a magnetism isolating ring (1), an outer iron core (2), a coil (3), a coil framework (4), an inner iron core (5) and a binding post (10); the inner iron core (5) is in an integral cylindrical stepped shaft shape and is internally provided with a stepped counter bore structure, the outer cylindrical surface of the step is attached to the inner cylindrical surface of the outer iron core (2), and the coil (3) is arranged on the outer cylindrical surface of the small end of the lower part of the inner iron core (5) and is fixedly connected with the end of the binding post (10); the magnetism isolating ring (1) is arranged at the lower part of the stepped counter bore of the inner iron core (5); the inner iron core (5) is fixedly connected with the binding post (10) through a plastic sealing column (6). The utility model discloses, adopt long and thin rod-like structure, the required space of installation is little, has solved the unable narrow and small space installation that adapts to of prior art electro-magnet, and it is slow to keep away from sprayer fuel sprayer position and result in oil spout response speed, is unfavorable for the fuel to realize the problem of accurate injection.

Description

Compact electromagnet

Technical Field

The utility model relates to a compact electro-magnet especially relates to an engine technical field's a compact electro-magnet.

Background

Along with the rapid development of social economy, the national emission standard is increasingly strict, the high-pressure common rail technology plays an increasingly important role in an engine, high-pressure fuel (the pressure exceeds 1000bar) pumped by a high-pressure oil pump in a diesel engine is conveyed into a high-pressure oil rail through a high-pressure oil pipe, then the fuel with constant pressure stored in the high-pressure oil rail is conveyed to an electric control oil injector through the high-pressure oil pipe, an ECU (electronic control unit) controller sends a current signal to an electromagnet on the electric control oil injector, the electromagnet attracts an armature to cause the conduction of a high-pressure fuel oil circuit, and the oil

Chinese patent: an electromagnet for quickly responding to electric control fuel injection (application number: 201120569080.4, publication number: CN 202529532U) comprises an iron core, a coil framework, an armature, a magnetism isolating ring, an outer shell, an inner shell, a valve rod, a valve seat, an armature accessory, a valve rod spring and a middle shell, and is characterized in that the magnetism isolating ring is arranged between the end face of a step below the iron core and the opening section of the inner shell, so that the total magnetic flux is divided into two paths after the coil is electrified, the problem of 'bonding' when the armature is released is solved, and the release speed is improved. However, the electromagnet is the same as most of existing electric control oil injector electromagnets, as shown in fig. 4 and 5, the electromagnet belongs to a disc-shaped electromagnet 21 installed at the top of an oil injector, and is limited by a space required by installation of a disc-shaped structure and a socket 22 connected with the outside, and cannot adapt to narrow space installation, meanwhile, the disc-shaped electromagnet 21 is far away from the position of an oil injection nozzle 19 of the oil injector, transmission needs to be carried out through a long piston rod 20 and a matching mechanism, mechanical hydraulic delay is serious after the electromagnetic valve acts, oil injection response speed of the oil injector is slow, accurate injection of fuel is not facilitated, and engine emission.

Disclosure of Invention

The electromagnetic valve aims to solve the problems that the electromagnet in the prior art is large in size, cannot adapt to installation in a narrow space, is far away from the position of an oil nozzle of an oil sprayer, is serious in mechanical hydraulic delay after the electromagnetic valve acts, is low in oil spraying response speed of the oil sprayer, is not beneficial to realizing accurate fuel spraying, and increases oil consumption and emission of an engine. The utility model provides a compact electro-magnet.

A compact electro-magnet, including separating magnetic ring, outer iron core, coil skeleton, interior iron core, its characterized in that: the device also comprises two binding posts; the inner iron core is in an integral cylindrical stepped shaft shape and is internally provided with a stepped counter bore structure, the outer iron core is tightly installed on the stepped cylindrical surface of the inner iron core, and the outer cylindrical surface of the step of the inner iron core is attached to the inner cylindrical surface of the outer iron core; the coil is arranged on the outer cylindrical surface of the small end of the lower part of the inner iron core, is wound on the coil framework in a double-wire parallel winding mode and is fixedly connected with the ends of the two binding posts; the magnetism isolating ring is arranged at a hole section at the lower part of the inner iron core stepped counter bore; the inner iron core is fixedly connected with the wiring terminal through a plastic sealing column.

The utility model discloses a long and thin shaft-like sprayer electro-magnet adopts integral long and thin cylindric structure, through the cascaded appearance overlap joint between the part, compact structure, the mountable is in the cylinder cavity of the injector body, simultaneously, through the inside terminal of electro-magnet, and electromagnetic control signal line is under the condition that the electro-magnet is close to the fuel sprayer as far as possible, still can reach injector body upper portion, links to each other with the external control model, can realize being close to the fuel sprayer installation.

Furthermore, the compact electromagnet also comprises a flat gasket and a disc-shaped spring gasket; the flat gasket and the disc-shaped spring gasket are arranged on the thin shaft section at the upper part of the plastic sealing column.

Furthermore, the top of the coil and the end face of the electromagnet are of a shallow and deep installation structure.

When the electromagnetic coil is implemented, the coil framework at the top of the coil is very thin, and the end part of the coil is very close to the end face of the electromagnet, so that a shallow-sinking-depth mounting structure can be formed.

Furthermore, the compact electromagnet further comprises a wiring lug, wherein the upper parts of the wiring posts are packaged by adopting a non-conductive material, so that the two wiring posts are separated; the wiring lug is fixedly connected with the top end of the wiring terminal and used for being connected with an external wiring harness plug.

Further, the non-conductive material is plastic, and the wiring lug is rectangular.

Further, the compact electromagnet further comprises a sealing plug, and the sealing plug comprises a main sealing ring belt and auxiliary sealing lips on two sides.

The utility model provides a compact electromagnet, adopt long and thin rod-like simple structure compactness, adapt to narrow and small space installation, can install in sprayer body inner chamber to can be installed near the fuel sprayer, reduce the size and the weight of piston rod motion piece, improve the response speed of sprayer oil spout greatly, realize accurate injection, reduce the oil consumption and the pollutant emission of engine; by adopting a shallow and deep mounting structure with the coil end part close to the end surface of the electromagnet, the electromagnetic force can be increased, the response speed is further improved, meanwhile, the quick heat dissipation of the coil is facilitated, and the service life of the electromagnet is prolonged; the top end of the terminal post is fixedly connected with a rectangular terminal lug which is combined with a cavity hole of the oil injector to form a socket for being connected with an external wiring harness plug, so that the space required by the external connection of the electromagnet with the socket and the corresponding installation in the prior art is reduced, and the manufacturing cost is reduced; the sealing plug adopts the structure that the auxiliary sealing lips are arranged on the two sides of the main sealing ring belt, and the sealing is reliable.

To sum up, the utility model discloses compare and have at least in prior art: the fuel injector can adapt to narrow space installation, is close to the position of a fuel injection nozzle of the fuel injector, has less mechanical hydraulic delay after electric action, has high fuel injection response speed of the fuel injector, and has the beneficial effects of facilitating the realization of accurate injection of fuel and reducing the fuel consumption and emission of an engine.

Drawings

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic view of a compact electromagnet according to the present invention;

FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1;

FIG. 3 is a schematic view of a compact electromagnet according to the present invention installed inside a fuel injector;

FIG. 4 is a schematic view of the installation of a disc-shaped electromagnet of a prior art fuel injector;

FIG. 5 is a schematic cross-sectional view of FIG. 4;

in the figure: 1. the magnetic isolation ring comprises a magnetic isolation ring, 2 parts of an outer iron core, 3 parts of a coil, 4 parts of a coil framework, 5 parts of an inner iron core, 6 parts of a plastic sealing column, 7 parts of a flat gasket, 8 parts of a disc-shaped spring gasket, 9 parts of a sealing plug, 10 parts of a binding post, 11 parts of a wiring lug, 12 parts of a control valve seat, 13 parts of an armature, 14 parts of a spring, 15 parts of an adjusting gasket, 16 parts of an oil sprayer body, 17 parts of a binding post leading-out cavity, 18 parts of an oil inlet hole, 19 parts of an oil sprayer, 20 parts of a piston rod, 21 parts.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention, and should not be construed as limiting the present invention. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1:

as shown in fig. 1, fig. 2, and fig. 3, the compact electromagnet according to this embodiment includes a magnetism isolating ring 1, an outer iron core 2, a coil 3, a coil frame 4, and an inner iron core 5, and is characterized in that: the device also comprises two binding posts 10; the inner iron core 5 is in an integral cylindrical stepped shaft shape and is internally provided with a stepped counter bore structure, the outer iron core 2 is fixedly arranged on a stepped cylindrical surface of the inner iron core 5, and an outer cylindrical surface of the step of the inner iron core 5 is attached to an inner cylindrical surface of the outer iron core 2; the coil 3 is arranged on the outer cylindrical surface of the small end of the lower part of the inner iron core 5, is wound on the coil framework 4 in a double-wire parallel winding mode and is fixedly connected with the ends of the two binding posts 10; the magnetism isolating ring 1 is arranged at a lower hole section of a stepped counter hole of the inner iron core 5; the inner iron core 5 is fixedly connected with the binding post 10 through a plastic sealing post 6.

The utility model discloses a compact electro-magnet adopts integral cylindric structure, through cascaded design, compact structure, the mountable is in the cylinder cavity of injector body 16, simultaneously, through the inside terminal 10 of electro-magnet, and the solenoid electric signal line is under the electro-magnet condition that is close to the fuel sprayer as far as possible, still can reach injector body 16 upper portion, links to each other with the external control model, can realize being close to the fuel sprayer installation.

When in use: the compact electromagnet provided by the embodiment is arranged in a cylindrical cavity of an oil sprayer body 16, so that the wiring terminal 10 passes through a wiring terminal leading-out cavity 17 to reach the upper part of the oil sprayer body 16, and the wiring lug 11 is connected with an external wiring harness plug to form a closed loop of a circuit; an adjusting gasket 15 and a spring 14 are sequentially arranged in a counter bore of the inner iron core 5, the end face of the control valve seat 12 is attached to the end face of the outer iron core 2, the lower cylinder of the armature 13 is arranged in a coupling manner with the mounting hole of the control valve seat 12, the sealing conical surface of the armature 13 is pressed and attached to the sealing conical surface of the control valve seat 12 by a pre-compression force generated by the initial compression amount when the spring 14 is arranged, when the external controller is electrified to the electromagnet coil 3 through the wiring lug 11, the outer iron core 2 and the inner iron core 5 of the electromagnet and the armature 13 generate electromagnetic attraction, when the electromagnetic attraction force is larger than the pre-compression force of the spring 14, the armature 13 moves upwards, the sealing conical surface of the armature 13 is separated from the sealing conical surface of the control valve seat 12, fuel oil at the lower part of the mounting hole of the control valve seat 12 flows out through the sealing conical surface to reduce the pressure of the fuel oil, and finally high-pressure fuel oil kept in the oil inlet hole 18 is enabled to flow through an oil nozzle of an oil injector to start oil injection; when the external controller is disconnected from electrifying the electromagnet coil 3, the armature 13 moves downwards under the action of the force of the spring 14, the sealing conical surface of the armature 13 is attached to the sealing conical surface of the control valve seat 12, fuel at the lower part of the mounting hole of the control valve seat 12 does not flow out through the sealing conical surface any more, so that the pressure of the fuel at the position is increased, and finally, the fuel injector nozzle is prompted to stop injecting fuel.

In the embodiment, the structure of the long and thin rod is simple and compact, the installation is suitable for narrow space, the long and thin rod can be installed in the inner cavity of the oil sprayer body 16 and can be installed close to an oil spray nozzle, the size and the weight of a piston rod moving part are reduced, the oil spraying response speed of the oil sprayer is greatly improved, the accurate injection is realized, and the oil consumption and the pollutant emission of an engine are reduced.

Example 2:

on the basis of the above embodiment, an embodiment 2 is proposed, as shown in fig. 1, which is characterized in that: the compact electromagnet further comprises a flat gasket 7 and a disc-shaped spring gasket 8; the flat gasket 7 and the disc-shaped spring gasket 8 are arranged on the thin shaft section at the upper part of the plastic sealing column 6.

Example 3:

on the basis of the above embodiment, an embodiment 3 is proposed, as shown in fig. 2, which is characterized in that: the top of the coil 3 and the end face of the electromagnet are of a shallow and deep mounting structure.

When the method is implemented, the coil framework 4 at the top of the coil 3 is very thin, and the end part of the coil 3 is very close to the end face of the electromagnet, so that a shallow-sinking-depth mounting structure can be formed.

In this embodiment, the shallow-sinking-depth installation structure that the end part of the coil 3 is close to the end face of the electromagnet is adopted, so that the electromagnetic force can be increased, the response speed is further increased, meanwhile, the quick heat dissipation of the coil 3 is facilitated, and the service life of the electromagnet is prolonged

Example 4:

on the basis of the above embodiment, an embodiment 4 is proposed, as shown in fig. 2, which is characterized in that: the compact electromagnet further comprises a wiring lug 11, wherein the upper parts of the wiring terminals 10 are packaged by adopting a non-conductive material, so that the two wiring terminals 10 are separated; and the wiring lug 11 is fixedly connected with the top end of the wiring terminal 10 and is used for being connected with an external wiring harness plug.

In this embodiment: the top end of the wiring terminal 10 is fixedly connected with a wiring lug 11 which is combined with a cavity hole of an oil sprayer to form a socket for being connected with an external wiring harness plug, so that the space required by an external socket of an electromagnet and corresponding installation in the prior art is reduced, and the manufacturing cost is reduced.

Example 5:

on the basis of the above embodiment, an embodiment 5 is proposed, which is characterized in that: the non-conductive material is plastic, and the wiring lug 11 is rectangular.

In this embodiment, plastics are kept apart, and rectangle auricle, can further reduce cost, reduce installation space.

Example 6:

on the basis of the above embodiment, an embodiment 6 is proposed, as shown in fig. 1, which is characterized in that: the compact electromagnet further comprises a sealing plug 9, wherein the sealing plug 9 comprises a main sealing ring belt and auxiliary sealing lips on two sides.

In this embodiment: the sealing plug 9 adopts the structure that the auxiliary sealing lips are arranged on the two sides of the main sealing ring belt, and the sealing is reliable.

Claims

1. The utility model provides a compact electro-magnet, is including separating magnetic ring (1), outer iron core (2), coil (3), coil skeleton (4), interior iron core (5), its characterized in that: the device also comprises two binding posts (10); the inner iron core (5) is in an integral cylindrical stepped shaft shape and is internally provided with a stepped counter bore structure, the outer iron core (2) is fixedly arranged on a stepped cylindrical surface of the inner iron core (5), and the stepped outer cylindrical surface of the inner iron core (5) is attached to the inner cylindrical surface of the outer iron core (2); the coil (3) is arranged on the outer cylindrical surface of the small end of the lower part of the inner iron core (5), is wound on the coil framework (4) in a double-wire parallel winding mode and is fixedly connected with the ends of the two binding posts (10); the magnetism isolating ring (1) is arranged at a lower hole section of a stepped counter bore of the inner iron core (5); the inner iron core (5) is fixedly connected with the binding post (10) through a plastic sealing column (6).

2. A compact electromagnet as claimed in claim 1, wherein: the device also comprises a flat gasket (7) and a disc-shaped spring pad (8); the flat gasket (7) and the disc-shaped spring gasket (8) are arranged on the thin shaft section at the upper part of the plastic sealing column (6).

3. A compact electromagnet as claimed in claim 1 or 2, characterized in that: the top of the coil (3) and the end face of the electromagnet are of a shallow and deep installation structure.

4. A compact electromagnet as claimed in claim 1 or 2, characterized in that: the wiring structure also comprises a wiring lug (11), wherein the upper parts of the wiring posts (10) are encapsulated by non-conductive materials, so that the two wiring posts (10) are separated; and the wiring lug (11) is fixedly connected with the top end of the wiring terminal (10) and is used for being connected with an external wiring harness plug.

5. A compact electromagnet as claimed in claim 3, wherein: the wiring structure also comprises a wiring lug (11), wherein the upper parts of the wiring posts (10) are encapsulated by non-conductive materials, so that the two wiring posts (10) are separated; and the wiring lug (11) is fixedly connected with the top end of the wiring terminal (10) and is used for being connected with an external wiring harness plug.

6. A compact electromagnet as claimed in claim 4, wherein: the non-conductive material is plastic, and the wiring lug plates (11) are rectangular.

7. A compact electromagnet as claimed in claim 5, wherein: the non-conductive material is plastic, and the wiring lug plates (11) are rectangular.

8. A compact electromagnet as claimed in claim 7, wherein: the sealing plug (9) comprises a main sealing ring belt and auxiliary sealing lips on two sides.

9. A compact electromagnet as claimed in claim 6, wherein: the sealing plug (9) comprises a main sealing ring belt and auxiliary sealing lips on two sides.