JPS59131768A - Drive spring meshing type starter - Google Patents

Abstract

PURPOSE:To improve meshing properties by a method wherein second shaft, having a contact, is arranged so as to be borne by the inner circumference of first shaft, formed integrally with a joint part, and vacuum is generated between both shafts to attenuate the energy of a plunger when the second shaft is moved rapidly. CONSTITUTION:The second shaft 9, mounting the movable contact 10, is borne by the inner circumference of the first shaft 6, formed integrally with the joint part 6a of a lever 4. When a magnet switch 3 is operated and only the second shaft 9 is moved by the rapid movement of the plunger 7, a space A is produced at the inner diametral part of the first shaft 6 and a high vacuum is generated, therefore, the energy of the plunger 7 is attenuated highly and sure meshing may be obtained without closing a main contact 13 before the driving spring 8 is deflected and a pinion 2a collides against a ring gear 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the meshing properties of a drive spring mesh starter.

In conventionally known drive spring engagement type starters, when the magnetic switch is activated, one lunge operates vigorously, so the main contact closes before the drive nut flexes and the pinion comes into contact with the ring gear f, and the motor starts. There is a problem in which the pinion and ring gear engage with each other after starting rotation, resulting in so-called poor engagement. As a countermeasure, there is a method of strengthening the drive spring, but this requires increasing the attraction force of the magnetic switch for operability, which has the disadvantage of increasing the size of the magnetic switch.

Moreover, increasing the suction force also increases the force of the deranger, so strengthening the drive spring and increasing the suction force has only a small effect, even though the magnetic switch becomes larger. do not have.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the meshing properties of a drive spring anastomotic nutata.

Therefore, the structure is such that the second shaft carrying the contact point is supported on the inner diameter of the first shaft integrally formed with the first inlet part, and the second shaft attempts to move rapidly. At this time, negative pressure acts between both shafts, greatly attenuating the momentum of the plunger.

An embodiment of the present invention shown in the drawings will be described below. In Fig. t, 1 is the housing of the starter;
Reference numeral 2 denotes an overrunning clutch, which is pushed out by a lever 4 when the magnetic switch 3 is energized and moves forward to engage with the ring gear 5 of the internal combustion engine. Reference numeral 6 denotes a first shaft having a diagonal portion 6a integrally formed with the lever 4, and a drive spring 8 is installed between the first shaft and the plunger 7. Reference numeral 9 denotes a second shaft on which a movable contact IO is mounted, and is supported on the inner diameter of the first shaft 6. 11 is a return spring, 12 is a coil,
13 is a main contact.

In FIG. 1, when the coil/L/12 is energized, the plastic jack 7 is attracted, and the force is transmitted to the drive spring 8, the first shaft 6, the cylinder head part 6a, the lever 4, and the clutch 2 in this order. The clutch 2 is pushed forward and the pinion 2a collides with the ring gear 5. However, if the teeth of the pinion 2a and the teeth of the ring gear 5 contact each other, the clutch 2 cannot move forward any further. It disappears. After that, only the plunger 7 and the second seat 9 move while bending the drive spring 8, the main contact 13 closes, the motor rotates, the pinion 2a and the ring gear 5 mesh, and the drive spring type engagement is established. Complete.

If the plunger 7 moves vigorously when the magnetic switch 3 is activated, the main contact 13 closes and the motor starts rotating before the drive spring 8 bends and the pinion 2a collides with the ring gear 5. As a result, the pinion 2a and the ring gear 5 do not mesh with each other, resulting in a so-called 11-coupling failure and the engine cannot be started. However, in the present invention, as shown in FIG. When only the second shaft 9 moves due to a movement, a space A is created in the inner diameter part of the first shaft 6 and a large negative pressure is applied, so the momentum of the plunger 7 is greatly attenuated, and the drive spring 8 is The main contact 13 does not close before the deflection pinion 2a collides with the ring gear 5, so that reliable meshing can be achieved.

As shown in FIG. 3, in addition to the above-described embodiment, a valve device 14 such as a hole is provided on the side of the first shaft 6a of the space A, and the same effect can be obtained. The return 9 can be improved.

As described above, the present invention has the effect of improving the meshing properties of the starter of the collar and Drivesgering anastomosis type having the above-mentioned configuration.

Moreover, since the magnetic switch does not have to be made large, it has many excellent effects such as being extremely practical.

[Brief explanation of drawings]

FIG. 1 is a half-sectional view of a starter showing an embodiment of the present invention;
FIG. 2 is a half-sectional view showing its operating state, and FIG. 3 is a half-sectional view showing another embodiment. 6...first shaft, 6a...ji4 ind. part, 7.
- Plunger, 8... Drive spring, 9...
-Second shaft, 10...movable contact. 456

Claims (1)

[Claims] A drive spring engagement type starter in which a drive spring is installed between a plunger and a first shaft formed with a diagonal inlet portion, and the plunger and a second shaft on which a movable contact is mounted are separated, A drive spring anastomosis type starter, characterized in that the second shaft is disposed so as to be axially supported on the inner diameter of the first shaft.