KR20110123195A - Electromagnet device for starter - Google Patents

Abstract

PURPOSE: An electromagnetic device for a starter is provided to reduce the entire size of a starter since an electromagnetic device and an electronic relay are coaxially arranged. CONSTITUTION: An electromagnetic device for a starter comprises a yoke, an excitation coil(2), a moving wire(4), a fixed wire(5), a convex part(21), a concave part(22), and a damping unit(24). The excitation coil is arranged on the inner circumferential surface of the yoke. The moving wire is arranged on the inner circumferential surface of the excitation coil. The fixed wire is arranged to be interlocked to the yoke and face the moving wire. The convex part is formed on one of facing surfaces of the moving wire and the fixed wire. The concave part and the convex part are formed on the other one of the facing surfaces.

Description

ELECTROMAGNETIC DEVICE FOR STARTER {ELECTROMAGNET DEVICE FOR STARTER}

The present invention relates to, for example, a starter electromagnet device for starting an engine mounted on an automobile or the like.

Background Art Conventionally, many engine starters are particularly used, but in recent years, automobiles equipped with an idle stop function have been increasing as a method for improving fuel efficiency of automobiles. When the starter is used for restarting after the idle stop as in the normal engine start-up, the use frequency of the starter is increased, so the durability of the starter is required.

On the other hand, in the engine room of a vehicle, a large number of components, such as a gearbox necessary for driving the engine and a transmission necessary for transmitting power from the engine, to the tire, are disposed in addition to the engine body and the starter. The surroundings are concentrated with other components. In recent years, the number of component parts has increased and the component parts have been enlarged to improve the performance of the engine. Therefore, the importance of miniaturization of the starter is increasing. In addition, in order to improve the merchandising, the importance is increased also about the quietness (음 音 性).

As a conventional starter, the structure etc. which are shown by Unexamined-Japanese-Patent No. 2009-246506 (refer patent document 1) are known, for example. The structure is provided with an electromagnetic force means for engaging the pinion with the ring gear, and an electromagnetic relay provided coaxially in series with the electromagnetic force means.

The starter described in the above-described conventional patent document 1 is provided with a technique for preventing engagement failure by enabling the electromagnetic device and the electromagnetic relay, which are electromagnetic force means, to be individually operated, so that the starter can be mounted on a vehicle having an idle stop function. Valid for

Moreover, since the electromagnet device which is an electromagnetic force means, and an electromagnetic relay are provided in coaxial series, it is effective also for downsizing as a whole starter.

However, when the starter described in Patent Document 1 simultaneously moves the electromagnet device and the electromagnetic relay, which are the electromagnetic force means, the moving iron core and the fixed iron core of the electromagnet device, which have been confused by the sound generated by the motor and engine from the power transmission unit, are confused. The problem arises that the collision sound of is recognized as a heterogeneous sound when only the electromagnet apparatus is moved.

The present invention has been made to solve the above-described problems, and by providing a shock absorbing member between the movable iron core and the fixed iron core, an electromagnet device for a starter capable of reducing the collision sound between the movable iron core and the fixed iron core is provided. It aims to provide.

The electromagnet device for a starter according to the present invention is fitted with a yoke that forms an outer circumference, an exciting coil disposed on an inner circumferential side of the yoke, a movable iron core disposed on an inner circumferential side of the exciting coil, and the yoke A starter electromagnet apparatus having a fixed iron core arranged to face the movable iron core, wherein the convex portion is formed on one of the opposing surfaces of the movable iron core and the fixed iron core, and the convex portion and the coarse firmness on the other side ( A concave portion having a concave shape having a through hole at the center thereof, and having a buffer member attached to the concave portion, wherein the buffer member is inserted into the buffer portion located in the concave portion and the through hole. Iii) and a fall prevention part provided on the opposite side to the buffer part.

The electromagnet device for starters according to the present invention can reduce the collision sound between the movable iron core and the fixed iron core by disposing a buffer member having a higher repulsion force than the suction force of the movable iron core and the fixed iron core between the movable iron core and the fixed iron core. A starter electromagnet device can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the electromagnet apparatus for starters which concerns on Embodiment 1 of this invention.
Fig. 2 is a sectional view showing a shock absorbing member in the electromagnet apparatus for starters according to Embodiment 1 of the present invention.
FIG. 3 is a front view of the shock absorbing member of the starter electromagnet device according to Embodiment 1 of the present invention, as viewed from the left side of FIG. 2.
Fig. 4 is a characteristic diagram showing the distance between the movable iron core and the opposing surface of the fixed iron core of the starter electromagnet apparatus according to Embodiment 1 of the present invention, the suction force and the repulsive force of the shock absorbing member.

Embodiment 1.

EMBODIMENT OF THE INVENTION Hereinafter, although Embodiment 1 of this invention is described based on FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the electromagnet apparatus for starters which concerns on Embodiment 1 of this invention. 2 is a cross-sectional view showing a shock absorbing member in the starter electromagnet apparatus according to the first embodiment of the present invention. FIG. 3 is a front view of the shock absorbing member of the starter electromagnet device according to Embodiment 1 of the present invention, seen from the left side of FIG. 2. Fig. 4 is a characteristic diagram showing the distance between the movable iron core and the opposing surface of the fixed iron core of the starter electromagnet apparatus according to Embodiment 1 of the present invention, the suction force and the repulsive force of the shock absorbing member.

In each of these figures, 1 is a yoke that forms an outer circumferential portion, is made of a magnetic material, and constitutes a magnetic circuit. 2 is an excitation coil which is arrange | positioned at the inner peripheral side of the yoke 1 and consists of the electrically conductive material recommended for the winding 3 which consists of an insulating material. 4 is a movable iron core made of a magnetic material disposed on the inner circumferential side of the exciting coil 2. 5 is a fixed iron core made of a magnetic material fitted to the yoke 1 and arranged to face the movable iron core 4. The movable iron core 4 is provided with the engaging member 6 and the biased spring 7. The biasing spring 7 fixes the axial shift lever (not shown) when the amount of movement in the direction of the fixed iron core 5 of the movable iron core 4 is greater than the amount of movement in the direction of the fixed iron core 5 of the engaging member 6. 5) Add direction. 8 is a return spring provided between the fixed iron core 5 and the movable iron core 4, and adds the movable iron core 4 to the axial shift lever side which is not shown in figure.

In addition, the figure shows the case where the electromagnetic relay which combined the yoke 1 was provided in coaxial series at the inner peripheral side of the yoke 1 as an example, Comprising: The plunger 9 which consists of magnetic materials and comprises a magnetic circuit 9 is shown. ), A coil 10 made of a conductive material recommended for the bobbin 11 made of an insulating material, a first core 12 made of a magnetic material and constituting a magnetic circuit, and made of a magnetic material. A second core 13, a rod 14 connected to the plunger 9, a return spring 15 for biasing the rod 14 and the plunger 9 in the right direction, a battery terminal 17 and a motor. The terminal block 16 with which the terminal 18 was mounted, the movable contact 19 connected with the rod 14, and the contact spring 20 which adds the movable contact 19 are provided.

By the way, the convex part 21 is formed in the one of the opposing surfaces of the movable iron core 4 and the fixed iron core 5, The convex part 21 is roughly similar to the convex part 21 in the other side, and the through-hole 23 is centered in the center. The recessed part 22 which has is formed. In the drawing, as an example, a convex portion 21 is formed on the side of the movable iron core 4 opposite to the fixed iron core 5, and a concave portion on the side of the fixed iron core 5 opposite the movable iron core 4. The case where 22 is formed is shown.

Further, the convex portion 21 and the concave portion 22 have a roughly analogous cone shape, and when the movable iron core 4 moves in the direction of the fixed iron core 5, the convex portion 21 and the concave portion 22 are concave. The convex part 21 is comprised in the shape slightly smaller than the concave part 22 so that the shape part 22 may not contact.

24 is a buffer member attached to the recessed part 22, The buffer member 24 is a buffer part 24a, the shaft part 24b, and the through-hole 23 which are located in the recessed part 22. As shown in FIG. It is inserted in the opposite side to the buffer part 24a, and has the fall prevention part 24c which protrudes in the circumferential direction rather than the through-hole 23, and has a hollow part 24d.

The buffer portion 24a of the buffer member 24 has an outer diameter larger than the inner diameter of the through hole 23 provided in the fixed iron core 5 and smaller than the inner diameter of the concave portion 22, and the depth of the concave portion 22. It is formed in a shape having almost the same thickness as. The shaft portion 24b of the shock absorbing member 24 combines the shock absorbing portion 24a and the slipping prevention portion 24c. The fall prevention part 24c of the shock absorbing member 24 is comprised from the some protrusion part which protruded in the circumferential direction from the through-hole 23 from the shaft part 24b.

The outer diameter of the front end side 24c1 of the fall prevention part 24c of the buffer member 24 is smaller than the inner diameter of the through hole 23, and the outer diameter of the rear end side 24c2 of the fall prevention part 24c is the through hole 23. It is formed in a shape larger than the inner diameter of). Although the fall prevention part 24c of the shock absorbing member 24 is comprised from three protrusion parts as shown in FIG. 3, it may be any number, and the outer diameter may be the same outer diameter in the shape of an umbrella rather than a protrusion. . In addition, although the hollow part 24d shows the case where the buffer part 24a side is open and the fall prevention part 24c side is closed, it may be reversed or a through hole may be sufficient as it.

The buffer member 24 has a concave shape provided in the fixed iron core 5 before the fixed iron core 5 is fixed to the yoke 1 or before the movable iron core 4 is inserted into the inner circumferential side of the excitation coil 2. It is attached to the part 22. The attachment of the shock absorbing member 24 inserts the fall prevention part 24c into the through hole 23 in the direction of the concave portion 22, and the fall prevention part 24c passes through the through hole 23. It is attached by pushing it up.

Next, based on FIG. 1 and FIG. 4, the distance between the opposing surface of the movable iron core 4 and the fixed iron core 5, the suction force, and the repulsive force of the shock absorbing member 24 are demonstrated. In FIG. 1, A represents the magnitude of the suction force and the repulsive force, and B represents the moving distance of the movable iron core 4. The distance between the movable iron core 4 and the shock absorbing member 24 is X, and the distance between the movable iron core 4 and the fixed iron core 5 is Y. When a voltage is applied to the excitation coil 2, a current flows in the excitation coil 2, and the movable iron core 4 moves in the direction of the fixed iron core 5. The position of the movable iron core 4 in FIG. 1 is the excitation coil. It is a stop state without applying a voltage to (2).

X and Y in FIG. 4 are the same values as in FIG. 1, X is the distance between the movable iron core 4 and the shock absorbing member 24, and Y is the distance between the movable iron core 4 and the fixed iron core 5. The suction force P is a suction force between the movable iron core 4 and the fixed iron core 5. The repulsive force Q is obtained by adding the repulsive force when the movable iron core 4 moves while compressing and deforming the shock absorbing member 24 and the repulsive force of the return spring 8.

Immediately after the voltage is applied to the exciting coil 2, the moving amount of the movable iron core 4 is zero, and is in the state of the left end of the characteristic diagram of FIG. The movable iron core 4 moves in the direction of the fixed iron core 5 by the suction force P between the movable iron core 4 and the fixed iron core 5 generated by the voltage applied to the exciting coil 2. When the moving amount of the movable iron core 4 is smaller than X, only the repulsive force of the return spring 8 becomes larger than X, and the repulsive force of the shock absorbing member 24 is added. Since the shock absorbing portion 24a of the shock absorbing member 24 is accommodated in the concave portion 22 to regulate the amount of deformation, the repulsive force Q with respect to the movement amount of the movable iron core 4 as shown in the characteristic diagram of FIG. 4. ) Rises sharply. Z is a moving distance until the movable iron core 4 stops, and is a position where the repulsive force Q and the suction force P form an equilibrium.

In the electromagnet device for starters configured as described above, the sound of collision between the movable iron core 4 and the fixed iron core 5 is provided by providing the buffer member 24 on the opposing surface of the movable iron core 4 and the fixed iron core 5. (衝突 音) can be reduced.

Further, the shock absorbing member 24 is configured to be arranged in the concave portion 22 and the through hole 23 of the fixed iron core 5, and the shock absorbing member 24 is provided so that the shock absorbing member 24c is provided to cushion the shock absorbing member 24. Since the member 24 is moved and regulated together in the radial direction and the axial direction, it can be fixed reliably, and the amount of deformation to the outer circumference of the buffer member 24 is regulated to increase the repulsive force, so that the magnitude of the suction force P is increased. Even if it is disturbed, the deviation of the movement amount of the movable iron core 4 can be suppressed.

In addition, since the convex portion 21 and the concave portion 22 were formed in the shape of a similar cone in a similar cone shape, when the convex portion 21 moves in a direction falling from the concave portion 22a, the convex portion 21 and the concave portion 21 are concave. Since the radial clearance of the shaped part 22 increases, the radial frictional force of the buffer member 24 becomes small, and the movement resistance at the time of returning the movable iron core 4 to a stop position can be made small.

In addition, since the repelling force Q of the shock absorbing member 24 is made larger than the suction force P between the movable iron core 4 and the fixed iron core 5, the movable iron core 4 and the fixed iron core 5 directly contact each other. The collision sound of the movable iron core 4 and the fixed iron core 5 can be reduced rather than the case where it directly contacts.

Moreover, by providing the hollow part 24d in the shock absorbing member 24 and making the fall prevention part 24c into a some protrusion part, the fall prevention part (without lowering the holding force of the shock absorbing member 24) ( The insertion resistance when the 24c is inserted into the through hole 23 can be lowered.

In addition, although Embodiment 1 mentioned above described the case of the starter electromagnet apparatus which the electromagnetic relay was comprised in coaxial series, the starter electromagnet apparatus which the electromagnetic relay is separate may be sufficient, and an electromagnetic relay is comprised separately from a starter. A starter electromagnet device may be used. In addition, although the case where the convex part was provided in the fixed iron core side was described in the case where the convex part was provided in the movable iron core side, the concave part was provided in the fixed iron core side in the movable iron core side, and the structure which provided the buffer member in the concave shape is provided. The same effects as those of the first embodiment described above may be achieved.

[Industrial Availability]

The present invention is suitable for the realization of the starter electromagnet device which can reduce the collision sound between the movable iron core and the fixed iron core.

1: yoke
2: excitation coil
4: iron core
5: fixed iron core
21: convex shape
22: concave
23: through hole
24: buffer member
24a: buffer part
24c: Fall prevention part

Claims (4)

Yoke having an outer periphery, an excitation coil disposed on an inner circumferential side of the yoke, a movable iron core disposed on an inner circumferential side of the excitation coil, and a fixed iron core fitted to the yoke and facing the movable iron core. An electromagnet device for starter, comprising: a convex portion formed on one side of an opposing surface of the movable iron core and the fixed iron core, a concave portion having a substantially similar shape to the convex portion on the other side, and having a through hole at the center thereof; And a shock absorbing member mounted on the concave portion, wherein the shock absorbing member includes a shock absorbing portion positioned in the concave portion and a release preventing portion inserted into the through hole and provided on the opposite side to the shock absorbing portion. Electromagnet device for The method of claim 1,
The convex portion and the concave portion are starter electromagnet apparatus, characterized in that the shape of a rough cone. 3. The method according to claim 1 or 2,
The repulsive force of the shock absorbing member is greater than the suction force of the movable iron core and the fixed iron core. 3. The method according to claim 1 or 2,
The departure prevention portion of the buffer member is a starter electromagnet device, characterized in that consisting of a plurality of protrusions protruding in the circumferential direction than the through hole.

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