KR101662116B1

KR101662116B1 - Actuator For Vehicle

Info

Publication number: KR101662116B1
Application number: KR1020150074258A
Authority: KR
Inventors: 최수길
Original assignee: 주식회사 인팩
Priority date: 2015-05-27
Filing date: 2015-05-27
Publication date: 2016-10-05

Abstract

The present invention relates to an automotive actuator including: a case including an installation space therein; a bobbin which is coupled into a case, and around which a coil is wound; a pair of cores respectively inserted into both end portions of the bobbin to form an operation space at a central portion thereof; a plunger coupled in the operation space of the cores to be movable; a shaft coupled through the plunger, and protruding toward an end portion of the case to be connected to a separate device; and locking member provided at the cores to temporarily fix the plunger. The locking member is made with permanent magnets provided at both sides of the cores to attach one of both sides of the plunger. The permanent magnets are provided at the cores which generate magnetic force between the cores of the bobbin when power is applied to the coils of the bobbin. The permanent magnets temporarily fix the plunger on the cores when the power is not applied to the coil of the bobbin, thereby preventing the plunger from being separated from the cores and moving.

Description

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BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an actuator for a vehicle, and more particularly to a vehicle actuator capable of operating a transmission mechanism of a transmission without using compressed air or a hydraulic pressure source.

Generally, automobiles are made up of tens of thousands of parts, among which there are devices that perform mechanical operations using electricity, hydraulic pressure, and compressed air. Such devices are called actuators.

These actuators are widely used in automobiles, for example, for parking brakes, clutches, door locks, suspensions, electric mirrors and transmission gears.

An actuator using an electromagnetic solenoid among conventional actuators is disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2002-199688), and is shown in Fig.

In the conventional actuator, a solenoid is provided in the housing 1. As is well known, the solenoid is formed by winding a wire 3 on a bobbin 2 which is a non-magnetic body.

On one side of the inner space of the solenoid, that is, the axial hole of the bobbin 2, a fixed core 4 of magnetic material is provided. On the other side of the inner space of the solenoid, a movable core 5 of magnetic material is provided so as to be axially movable with respect to the stationary core 4. On the outer peripheral surface of the bobbin 2, a yoke 6 of a magnetic substance extending in the axial direction is provided. A lock mechanism (10) is provided between the yoke (5) and the outer peripheral surface of the movable core (5). The lock mechanism 10 is locked while the solenoid is being energized to restrain the movable core 5 to the yoke 6 so that the relative position between the movable core 5 and the yoke 6 It does not change.

The lock mechanism 10 includes a concave portion formed in a part of the inner side surface of the yoke 6 so as to face the outer circumferential surface of the movable core 5, a leaf spring as a hemispherical non-magnetic body provided in the concave portion, 5), and a latching protrusion fixed to the plate spring and engaged with the latching groove.

That is, when the movable core 5 is moved to the fixed core 4 by the electromagnetic force generated by the coil 3 and the electromagnetic force is generated in the movable core 5, the engaging protrusion caught in the retaining groove is detached.

In the conventional actuator as described above, there is a problem that operation noise is generated due to repeated detachment of the locking protrusion hooked on the locking groove or engagement of the locking protrusion on the locking groove.

In addition, there is a problem that the lock mechanism 10 for preventing the flow of the movable core 5 is composed of a large number of components, the structure is complicated, the unit price is increased, and the assembly takes a long time.

Japanese Patent Application Laid-Open No. 2002-199688

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vehicle actuator for simplifying the assembling process while improving operating noise by simplifying the structure of the lock mechanism for preventing the flow of the movable core.

According to an aspect of the present invention, there is provided a bobbin having a case having a mounting space on the inside, a bobbin coupled to the inside of the case and wound with a coil, and a bobbin inserted into both ends of the bobbin inside, A pair of cores, a plunger movably coupled in the working space of the core, a shaft penetratingly connected to the plunger and protruding from one end of the case and connected to another device, and a shaft provided on the core for temporarily fixing the plunger Wherein the bobbin is a case in which a shaft is protruded for moving the shaft to another device and the shaft is protruded for pushing operation, A first bobbin and a second bobbin sequentially coupled at an end of the first bobbin, wherein power to the coil of the second bobbin is first applied to the coil of the first bobbin And a third bobbin and a fourth bobbin connected to the bobbin for pushing and sequentially coupled to the opposite side of the end of the case protruding from the shaft for pulling action by another device, And a pull bobbin configured to apply power to the coil of the fourth bobbin before the coil.

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Preferably, the edge of the core is formed to be lower than the center to constitute a step to engage the lock member with the step, the central part of the plunger is formed as a groove, the edge is formed to protrude and the edge of the plunger is attached to the lock member Do.

It is preferable that the core is provided with a pad member made of a rubber material so as to prevent the plunger from hitting the core while being first in contact with the inside of the central portion of the plunger formed by the groove.

According to the present invention, a permanent magnet is provided in a core which generates a magnetic force between itself and the coil of the bobbin when power is applied to the coil of the bobbin, so that when the electric power is not applied to the coil of the bobbin, Thereby preventing the plunger from flowing away from the core.

1 is a sectional view showing a conventional actuator.
2 is a sectional view showing an actuator for a vehicle according to an embodiment of the present invention;
Fig. 3 is a cross-sectional view of a main part showing a core provided with a lock member in the actuator of Fig. 2; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 2 is a cross-sectional view showing an actuator for a vehicle according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view showing a core having a lock member in the actuator of FIG.

The vehicle actuator 100 according to an embodiment of the present invention is largely composed of a case 110, a bobbin, a core 130, a plunger 140, a shaft 150, and a lock member 160 .

The case 110 is formed in the shape of a pipe having a circular cross section extending in one direction and having both ends opened. The case 110 has a flange 111 at one end and a terminal housing 112 at the other end. A bobbin having a coil 121 wound thereon is coupled to the inside of the case 110.

The first bobbin 122, the second bobbin 123, the third bobbin 124, the fourth bobbin 124, and the second bobbin 124 are coupled to each other in the longitudinal direction of the case 110, 125). A coil 121 is wound around the outer periphery of each bobbin. A yoke, which is a magnetic body, is provided between the bobbins.

The first bobbin 122 to the fourth bobbin 125 are connected to each other to form a working space 126 in which a plunger 140 described later reciprocates.

When the power is applied to the coil 121 wound on the bobbin, a magnetic field is generated around the bobbin and the plunger 140 is moved.

Here, the first bobbin 122, the second bobbin 123, the third bobbin 124, and the fourth bobbin 125 are referred to as one end (left to right in the drawing) at the other end of the case 110 The first bobbin 122 and the second bobbin 123 serve to perform a push operation when the coil 121 is powered on and the third bobbin 124 and the fourth bobbin 125 serve as a coil, (PULL) action when the power source of the power source 121 is applied. Here, the first bobbin 122 and the second bobbin 123 may be referred to as a push bobbin, and the third bobbin 124 and the fourth bobbin 125 may be referred to as a pulling bobbin.

That is, the first bobbin 122, the second bobbin 123, the third bobbin 124, and the fourth bobbin 125 sequentially move from the inner end of the case 110 protruded from the shaft 150 to the opposite end, .

Here, the control unit is connected to each of the coils 121 wound on the first bobbin 122, the second bobbin 123, the third bobbin 124, and the fourth bobbin 125, And controls the time when power is applied to the coil 121. [

That is, the third bobbin 124 and the third bobbin 124, which control the time of power application to the coils 121 provided in the first bobbin 122 and the second bobbin 123, respectively, The time for which the power is applied to the coil 121 provided in the fourth bobbin 125 is controlled.

More specifically, power is first applied to the coil 121 of the second bobbin 123 and then power is applied to the coil 121 of the first bobbin 122, so that the plunger 140, which will be described later, The first bobbin 122 is moved toward the first bobbin 122, thereby reducing the shock generated during operation.

The power is first applied to the coil 121 of the third bobbin 124 rather than the coil 121 of the fourth bobbin 125 so that the speed at which the plunger 140 moves toward the fourth bobbin 125 is reduced .

The core 130 is composed of a first core 130 and a second core 130, which are installed at both inner ends of the bobbin. The core 130 effectively induces a magnetic field generated by a current flowing along the coil 121 at the time of power application, thereby allowing the plunger 140, which will be described later, to move smoothly. That is, the first core 130 is coupled to the inside of the first bobbin 122, and the second core 130 is coupled to the inside of the fourth bobbin 125.

The plunger 140 is reciprocally movable inside the bobbin and is configured to reciprocate between the first core 130 and the second core 130. The plunger 140 is moved by a magnetic field generated when power is applied to the coil 121. That is, in the plunger 140, the coil 121 to which power is applied among a plurality of bobbins is moved toward the de-bobbin.

The plunger 140 is fixedly inserted into the center of the outer side of the shaft 150 for reciprocatingly moving the operating force to another device of the vehicle.

The shaft 150 is fitted to the inside of the bobbin coupled to the case 110 so that one end of the shaft 150 is located inside the terminal housing 112 coupled to one end of the case 110.

That is, one end of the shaft 150 is positioned inside the terminal housing 112 and the other end of the shaft 150 is protruded to the other side of the case 110 through the two cores 130 that are inserted and coupled to the inside of the bobbin, To operate other devices.

A position sensor for detecting the position when the shaft 150 reciprocates is provided at the inside of the terminal housing 112 and at one end of the shaft 150. Here, the position sensor is composed of a magnet provided inside the terminal housing 112 and a hall sensor provided at one end of the shaft 150.

Meanwhile, the core 130 further includes a locking member 160 for locking the plunger 140 so that the plunger 140 is temporarily fixed without flowing when the coil 121 is not powered on.

The lock member 160 is constituted by a magnet provided inside the bobbin, that is, the first bobbin 122 and the fourth bobbin 125, respectively, for generating a magnetic force for attracting the plunger 140. That is, the lock member 160 is composed of a permanent magnet, and attracts the plunger 140 temporarily to fix the coil 121 wound on the bobbin even when power is not applied.

Here, the permanent magnet, which is the lock member 160, is formed in a ring shape and is fixed to the edge of the inner surface of the core 130 (the surface fitted to the inner side of the bobbin).

In order to minimize the impact of the plunger 140 and the core 130 when the plunger 140 reciprocates, the inner edge of the core 130 is formed with a step 131 lower than the center of the core 130 . Therefore, the permanent magnet, which is a locking member, is provided on the step 131 of the core 130.

The central portions of both side surfaces of the plunger 140 are formed in a groove shape so as to fit the center portion of the inner side of the core 130 so that the edges protrude to correspond to the permanent magnets provided in the step 131 of the core 130 .

The core 130 is made of a rubber material so that both sides of the plunger 140 do not hit against the core 130 in order to prevent noise from being generated when the plunger 140 hits the core 130 when the plunger 140 reciprocates A pad member 132 is provided.

The pad member 132 protrudes from the center of the core 130 so that the pad member 132 contacts the inside of the groove formed at both ends of the plunger 140.

The operation of the actuator for a vehicle according to an embodiment of the present invention having the above-described structure will be briefly described.

When the plunger 140 is in a state of being engaged with the core 130 provided on the terminal housing 112 side, that is, when the plunger 140 is operated in the pull- The state in which it is located is defined as the initial state.

Thereafter, power is applied to the coil 121 of the push bobbin, and power is not applied to the coil 121 of the pull bobbin. Then, a magnetic field is generated between the core 130 coupled to the end of the case 110 protruded from the shaft 150 and the push bobbin, and the plunger 140 is sucked. Then, the shaft 150 coupled to the plunger 140 is further projected to the outside of the case 110 to actuate another apparatus.

When power is applied to the coil 121 of the push bobbin, the controller (not shown) controls the first bobbin 122 and the second bobbin 123, which are the push bobbins, The power is applied to the first bobbin 122 with a time difference.

Thereafter, the control unit cuts off the power applied to the coil 121 of the push bobbin, and turns on the power to the coil 121 of the pull bobbin. The plunger 140 positioned at the side of the core 130 on which the shaft 150 protrudes has the core 130 provided on the pulling bobbin side by the magnetic force generated between the core 130 on the opposite side and the pulling bobbin, .

At this time, when the power is applied to the coil 121 of the pulling bobbin, the control unit first applies power to the third bobbin 124 among the third bobbin 124 and the fourth bobbin 125, which are the pulling bobbins, So that power is supplied to the fourth bobbin 125 after a predetermined time.

According to the actuator for a vehicle according to one embodiment of the present invention having the above-described structure, when a power is applied to the coil 121 of the bobbin, the core 130 generating magnetic force with the coil 121 of the bobbin, The plunger 140 is temporarily fixed to the core 130 to prevent the plunger 140 from falling away from the core 130 when electricity is not applied to the coil 121 of the bobbin do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

100: Actuator
110: Case 111: Flange
112: Terminal housing
121: Coil
122: 1st bobbin 123: 2nd bobbin
124: third bobbin 125: fourth bobbin
126: working space
130: Core
140: plunger
150: shaft
160:

Claims

A case having a mounting space inside;
A bobbin inserted into and coupled to the inside of the case and wound with a coil;
A pair of cores fitted respectively at both inner ends of the bobbin to form a working space at a central portion thereof;
A plunger movably coupled in an operating space of the core;
A shaft penetratingly connected to the plug and projecting to one end of the case and connected to another device;
And a lock member provided on the core and for temporarily fixing the plunger, wherein the lock member is constituted by permanent magnets provided on both sides of the core for attaching one side of both sides of the plunger,
The bobbin is constituted by a first bobbin and a second bobbin sequentially shifted from the end of the case in which the shaft protrudes for the push operation to the other device by moving the shaft, A push bobbin configured to be applied first,
And a third bobbin and a fourth bobbin connected to the bobbin for pushing and sequentially coupled to the opposite side of the end of the case in which the shaft protrudes for a pull action with another device, And a pull bobbin configured to be powered first.

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The method according to claim 1,
The edge of the core is formed lower than the center so as to constitute a step, and the lock member is engaged with the step,
Wherein the central portion of the plunger is formed as a groove, and the edge is protruded so that an edge of the plunger is attached to the lock member.

6. The method of claim 5,
In the core,
And a pad member made of a rubber material is provided so as to prevent the plunger from hitting the core while being first in contact with the inside of the central portion of the plunger formed as the groove.