JPS6318183A - Plunger mechanism of magnetic solenoid for starter - Google Patents

Abstract

PURPOSE:To make the good engaged state of a pinion with a ring gear securable, by neutralizing a spring member temporarily at the early stage of engine starting, and connecting a plunger directly to an interlocking shaft. CONSTITUTION:When a coil 15 of a bobbin 14 is energized, a plunger 1 makes an interlocking shaft 6 move in the rearward C via a coil spring 13, having a pinion 29 engaged with a ring gear 30 with A rotation of a rotating lever 24, and an interval between contacts 21 and 22 is closed, thus a starting motor 27 is started. At the time of this starting, with retreatment of the plunger 1, a projecting strip part 2a of a cancel member 2 presses a tilting part 3 to another tilting part 8a of a lock plate 7 along a sliding groove 9c of an actuating ring 9, making it into slide motion and engage the cancel member 2, whereby the coil spring 13 is neutralized, connecting the plunger 1 directly to the interlocking shaft 6, and a displacement position is directly transmitted to it. When the plunger is further retreated, the engagement is released, so that the coil spring 13 is made into effectuality again. Thus, a good engaged state of the pinion with a ring ear is securable.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a system for moving a pusher via a spring member when starting an engine to transmit an output shaft of an electric motor to a crank side of an engine. First time starting the engine
Electromagnetic solenoid plunger IX for starters has been improved to temporarily disable the spring member when assembled! Involved in the structure.

[Prior Art] Conventionally, in electromagnetic solenoids for automobile starters, a plunger moves backward when electricity is applied when the engine is started, and the displacement of this plunger is connected to a coil spring through a spring member such as a coil spring. 8. This interlocking shaft moves backward by moving the rotation lever to a predetermined 1. Rotate it in the direction. This rotary lever causes a pinion provided on the output shaft of the electric motor to move forward together with the one-sided clutch and mesh with a ring gear on the engine crank side. This situation! Budeden vJ
When power is applied to Ia, the rotation of the pinion is transmitted to the ring gear, making it difficult to start the engine.

[Problem to be Solved by the Invention 1] A drive spring as a spring material is provided between the plunger and the interlocking shaft.

At the beginning of the movement of the plunger, the drive spring is bent due to the static force of the pinion and one-sided clutch, and a situation occurs in which the displacement of the plunger is not transmitted to the interlocking shaft.

For this reason, when the engine is started, the pinion begins to rotate before it meshes with the ring gear, causing problems such as missing teeth and defects.

This kind of technology is r! The eight series are published in Japanese Utility Model Application No. 145767, filed on March 9, 1980, with Mitsubishi Electric Co., Ltd. as the applicant, and published on September 13, 1980. There is something described as a starting magnet switch.

This publication of Utility Model Application Publication No. 57-145767 is so true.
Electromagnetic coil, fixed iron core, return spring, movable iron core J3
However, as will become clear from the detailed description of the invention to be described later, the technical content is completely (fundamentally different) from this invention.

As mentioned above, this invention was developed by Mitsubishi Electric Corporation in 1930.
This was done based on a completely different technical concept from that of Japanese Utility Model Application Publication No. 57-145767 filed on March 9, 1986, and the spring member is temporarily removed at the initial stage of engine starting without any loss of starting function. By disabling it and directly connecting the plunger to the interlocking shaft, it is possible to avoid the situation where the pinion is in a rotating state before it engages, and the impact at this time does not cause tooth cracking, and the pinion is able to maintain good contact with the ring gear. It is an object of the present invention to provide a plunger mechanism for an electromagnetic solenoid for a starter, which has an excellent effect of ensuring a meshing state.

[Means for Solving the Problems] The present invention provides a coil that is wound around a cylindrical bobbin and is energized at intervals when the engine is started, and a coil that can be moved back and forth in the axial direction within the bobbin. A cylindrical plunger is disposed and moves when the coil is energized, and a cylindrical plunger is provided within the plunger so as to be movable in the direction of the axis, and as the plunger moves in the direction of the axis, the plunger is displaced in the direction of the axis via a spring member. an interlocking shaft that connects the output shaft side of the engine to the crank side of the engine; and an interlocking shaft that is inserted into the interlocking shaft so as to be movable in the axial direction, and is normally held in a locked state on the receiving shaft side by the biasing force of the spring member. and an actuating ring formed on the plunger, which is directly connected to the interlocking shaft to nullify the spring member when the coil is energized, and which disables the spring member during the displacement process of the plunger. is the said series vIr
A configuration is adopted in which a 4-Yansel member is configured to release the direct connection of the plunger to the interlocking shaft and activate the spring member by moving toward and away from the t* side. There is.

According to the invention configured as described above, the spring member is temporarily disabled and the plunger is directly connected to the interlocking shaft, so that the displacement of the plunger is not affected by the interlocking shaft. It will be transmitted directly. Therefore, the pinion meshes with the ring gear without delay, and there is no possibility that the pinion becomes rotating before the ring gear meshes with the ring gear.

[Effects of the Invention] According to the present invention, the spring member is temporarily disabled and the plunger is directly connected to the interlocking shaft at the initial stage of engine startup without any loss of starting function, so that the pinion rotates before engagement. Plunger 8 of an electromagnetic solenoid for a starter has an excellent effect of avoiding an inconvenient situation such as a state where the pinion is engaged with the ring gear and ensuring a good meshing state of the pinion with the ring gear! It is possible to provide a structure.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

First, Fig. 1 shows the overall external appearance of this invention, and Fig. 2 (a), (b), and (C) explains this situation in detail.
), 1 is a cylindrical plunger disposed in a cylindrical bobbin (described later) so as to be movable back and forth along the axial direction;
A canceling member 2 is formed on the inner peripheral surface of this. This canceling member 2 has three protrusions 2a extending in the axial direction.
, 2b, and 2C as a set, and have substantially the same width dimension and a thin rectangular cross-section. The thickness of the central ridge 2b is set to be smaller than the thicknesses of the ridges 2a and 2C on both sides. Such a protrusion 2
A, 2b, and 2C are formed in three sets at equal angular intervals in the circumferential direction, and a groove 2d is formed between them. Projections 2b, 2C
As shown in FIG. 2(C), the rear end portion is formed with a continuous slope portion 3 at a predetermined angle, and the protrusion portion 2a is provided with a slope portion 4 similar to the protrusion portion 2C. It is being and,
The 7-shaped groove formed by the cooperation of the inclined part 3 and the protruding part 2a is a cylindrical interlocking shaft u6, which is shown in (a) and (b) in Fig. 3. , as shown in (C), the plunger 1 is inserted into the plunger 1 in the axial direction, the front end is connected to a rotating lever described later, and the rear end is provided with a lock disc 7 having a diameter smaller than the inner diameter of the plunger 1. is formed. Projections 8 are formed on the outer circumference of the lock disc 7 at equal angular intervals of 120 degrees in the axial direction. This protruding piece 8 is provided with an inclined portion 8a that faces the inclined portion 3 of the protruding stripes 2a and 2b of the canceling member 2. Then, the distance N from the center of the pick board 7 to the outermost circumference of the protruding piece 8 is determined by
It is made approximately equal to the radius M of the strip Ft2d in . This situation! In this case, the inclined portion 8a of the protruding piece 8 faces the inclined portion 3 of the protruding ridge portion 2a of the canceling member 2. In FIGS. 4(a), 4(b), and <C>, reference numeral 9 denotes a rotary ring, which is positioned within the canceling member 2 so as to be inserted into the interlocking shaft 6. A total of six protrusions 9a and 9b extending in the axial direction are formed on the outer peripheral surface of the operating ring 9 at angular intervals of 60 degrees. These protruding strips 9a and 9b are set to have approximately the same width dimensions, and slide between the protruding strips 9a and 9b. ? ) 9c, as well as protruding strips 9b and 9a.
A sliding groove 9d is provided between the two. On the surface of the actuating ring 9 facing the lock disc 7, as shown in FIG. An inclined portion 11 is formed from the protruding strip 9b to the tip of the sliding groove 9C.

At this time, the V-shaped gap formed between the slopes 10 and 11 is used as the lock groove 12. In this state, the actuating ring 9 is positioned in the groove 2d of the Jansel member 2 with the protruding strip 9a81, receives the protruding strip 2a by the sliding groove 9C, and the protruding strip 9
b overlaps the protrusion 2b, and the protrusion 2C is received by the sliding groove 9d. In addition, in this state, the protrusion 8 is inserted into the lock groove 12 in which the sliding groove 9d of the operating ring 9 exists.
The inclined portion 8a is fitted. As seen in FIG. 1, there is a space between the operating ring 9 and the plunger 171.
A coil spring 13 as a spring member is disposed, and the operating ring 9 is biased toward the lock disc 7. In FIG. 4, 14 is a bobbin in which the plunger 1 is located, and a coil 15 is wound around the outer periphery of the bobbin. 16 is a pressing plate attached to the rear end opening of the plunger 1; 17 is a ground plate provided hanging down from the frame 18; 19a is a coil spring provided between the pressing plate 16 and the ground plate 17; 19 is an interlocking A contact shaft arranged coaxially with the shaft 6, which is movable in the axial direction, connects the movable contact 2 via an insulating pusher 120.
1 is attached. This movable contact 21 comes into contact with the fixed contact 22 by moving backward, and the electric power! l] The machine is now energized. And contact shaft 1
Reference numeral 9 is always biased by a spring 23 in a direction in which the movable contact 21 is spaced a distance m from the fixed contact 22. Now, the rotary lever 24 is rotatable in the clockwise and counterclockwise cutting directions as shown by the arrows A and B in FIG. The other end is pivoted to the sleeve 26. This sleeve 26 is electric! '] is provided on the output shaft 27a of the machine 27 so as to be movable back and forth together with a roller clutch 28 and a pinion 29 as a one-way clutch. 30 is a ring gear connected to the engine crank side of the vehicle.

Next, the operation of the embodiment created as described above will be explained.

To start the engine, a starting switch (not shown) is operated to energize the coil 15 of the bobbin 14. Due to the magnetic force of the coil 15 generated thereby, the plunger t-1 moves rearward as shown by arrow C in FIG. This movement is continuous via the coil spring 13! 7] It is transmitted to the shaft 6, and the series I! The lJ axis 6 moves backward. As a result, the rotary lever 24 rotates in the direction shown by arrow A in the figure, and the pinion 29 moves between the sleeve 26 and the roller clutch 2.
8 and meshes with the ring gear 30.

At this time, due to the backward movement of the plunger 1, one contact shaft moves backward through the suppression plate 16 against the spring force of the spring 23, that is, the urging force, and the movable contact 21
contacts the fixed contact 22.

Therefore, the electric motor 27 is energized, the rotation of the output shaft 27a is transmitted to the ring gear 30 via the pinion 29, and the engine is started.

The operations accompanying the movement of the plunger 1 at the time of starting the engine are shown in FIGS. 6(a) and 6(b) to FIG. 9(a),
(b) will be explained in more detail.

As the plunger 1 moves backward from the state shown in FIG. Press against the inclined portion 8a of the protruding piece 8 at 7. In this case, the inclined portion 8a of the protrusion 8 is caused to rotate due to the rotation of the lock plate 7.
slides on the inclined portion 3 in the direction of arrow P in FIG.
> As shown, the lock is engaged in the locked state 12. At this time, since the plunger 1 has already moved in the direction of arrow C, the drag force against the interlocking shaft 6 involves kinetic friction, which is smaller than static friction. (expressed as a function of the coefficient of friction and the coefficient of kinetic friction, respectively), and as a result, the coil spring 13
The reaction force causes the plunger 1 to move slightly in the opposite direction of arrow C, as shown in FIG. Therefore, the inclined part 3 of the canceling member 2 separates from the inclined part 8a of the protruding piece 8, but this phenomenon is temporary, and the attraction force of the coil 15 causes the plunger 1 to move further in the direction of arrow C from the position shown in FIG. Move to. Then, the inclined portion 4 of the protruding portion 2C of the canceling member 2 comes into contact with the inclined portion 8a of the protruding piece 8, and the inclined portion 8a moves the inclined portion 4 of the protruding portion 2C into the ninth position while the lock plate 7 rotates. It slides in the direction shown by arrow S in Figure (a). Then, the inclined portion 8a is aligned with the inclined portion 1 of the protruding strip 9a in the movable ring 9.
0, enters the groove 2d in the canceling member 2 in this state, and becomes capable of relative displacement along the groove 2d in the axial direction, that is, in the direction of arrow C. Therefore, the coil spring 13 is activated, and the displacement of the plunger 1 in the direction of the arrow C is transmitted to the rotation lever 24 via the coil spring 13, the operating ring 9, and the interlocking shaft 6.

Furthermore, when the ring gear 30 starts rotating on its own, the current to the coil 15 is cut off and the plunger 1 moves in the opposite direction of arrow C due to the biasing force of the coil spring 13, which causes the contact shaft 1 to move in the same direction. Then, the movable contact 21 separates from the fixed contact 22, and the power supply to the electric shovel 27 is cut off. At the same time, the rotary lever 24 rotates in the direction of arrow B, and the pinion 29 retreats together with the roller clutch 28 via the sleeve 26, thereby releasing the engaged state with the ring gear/'30.

At this time, as the plunger 1 moves in the opposite direction of arrow C, the canceling member 2 is displaced in the same direction, and traces back from the state shown in FIG. 9(b) to the original state shown in FIG. 6(b). Return.

In this manner, at the beginning of engine startup, the displacement of the plunger 1 is directly transmitted to the interlocking shaft 6, and the coil spring 13 is temporarily disabled, so that the plunger Unlike the conventional system in which the displacement of the pinion 29 is absorbed,
This prevents the pinion 29 and the ring gear 30 from rotating before they mesh with the ring gear 30, prevents damage to the pinion 29 and the ring gear 30, and improves the meshability of the two pinions with the ring gear 30. It is.

In addition, although the above embodiment is applied to an engine for an internal expansion engine, the scope of application is not limited to this only, and may be applied to a Φ vehicle equipped with a gas turbine, and can be widely applied to starters in general. It is something.

Further, the inclined portions of the canceling member 2, the projecting piece 8, and the actuating ring 9 may be constructed so that their surfaces are carefully finished so that they can easily slide against each other. In this case, balls with extremely small particle diameters may be slidably provided on either one of the inclined parts that slide against each other.

In addition, in specific implementations, the elastic modulus of each spring can be changed as necessary, and various other changes can be made without departing from the gist of the invention.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, and FIG. 1 shows a plunger,
An exploded side view showing the working VJ ring and the lock disc, Figure 2 (a>, (b) and (C) are a side view of the plunger, a front view of the plunger, a developed view of the canceling member,
<a>, (b), and (C) in Fig. 3 show a side view of the interlocking shaft, a front view of the interlocking shaft, and a developed view of the lock disc, respectively, and (a), (b), and (C) in Fig. C) is a side view of the working ring, a front view of the working ring, and an exploded view of the working ring.
The figure is a partially cutaway front view of the whole, Fig. 6(a),
FIGS. 9(b) to 9(a) and 9(b) are explanatory diagrams for explaining the operation of the plunger, the eight linked shafts, and the lock disc of the fl driving ring at the time of starting the engine. In the figure, 1...Plunger 2...Cancelling member 5
... Cancellation groove 6 ... Interlocking shaft 7 ... [] Pick plate 8 ... Projection piece 9 ... Operating ring 12 ... Lock groove 13 ... Coil spring (spring member) 15.
...Coil 27...Electric motor 27a...Output shaft 2
8...Roller clutch (one-way clutch) 29...
・Pinion 30...Ring gear

Claims (1)

[Scope of Claims] Coils that are wound around a cylindrical bobbin and are momentarily energized when the engine is started; and coils that are arranged within the bobbin so that they can move back and forth in the axial direction and are moved by energizing the coils. a cylindrical plunger; and an interlocking shaft that is disposed within the plunger so as to be movable in the axial direction and is displaced in the same direction via a spring member as the plunger moves backward to connect the output shaft side of the electric motor to the crank side of the engine. an operating ring that is inserted into the interlocking shaft so as to be movable in the axial direction and is normally held in a locked state on the interlocking shaft side by the biasing force of the spring member; With a predetermined deflection of the spring member, the spring member is directly connected to the interlocking shaft to disable the spring member, and during the displacement process of the plunger, the plunger moves toward and away from the interlocking shaft, thereby causing the plunger to move toward and away from the interlocking shaft. A plunger mechanism for an electromagnetic solenoid for a starter, comprising a canceling member that activates the spring member by releasing the direct connection of the plunger.