JPH07704Y2 - Starter pinion stopper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a starter pinion stopper device, and more particularly to a so-called overhang type starter pinion stopper device in which a pinion is installed in front of a bearing. is there.

[Conventional technology]

FIG. 2 is a sectional view showing a conventional pinion stopper device for a starter. In the figure, 1 is an output rotary shaft, through which the rotation of the armature rotary shaft 3 is transmitted via the planetary gear speed reducer 2. Reference numeral 4 denotes a pinion drive shaft driven by the output rotary shaft 1 via an overrunning clutch 5, and a pinion 6 is integrally formed at the tip end portion thereof. Further, the pinion drive shaft 4 has a bearing 8 attached to the front bracket 7.
Is supported slidably in the axial direction of the output rotary shaft 1, and a sleeve metal 9 is arranged between the output rotary shaft 1 and the output rotary shaft 1. 10 is a large-diameter portion formed on the inner circumference of the pinion drive shaft 4 from the tip to a predetermined length, 11 is a step portion at the end of the large-diameter portion 10, and 12 is a large-diameter portion 10 and the outer circumference of the output rotary shaft 1. It is a space formed between them. Numeral 13 is a stopper, which is formed in a ring-shaped cross section that is loosely fitted in the space 12, and is positioned by engaging a stopper ring 15 fitted in a ring groove 14 provided at the tip of the output rotary shaft 1. ing. 16 is a lever having one end connected to a plunger of an electromagnetic switch (not shown) and the other end connected to the rear of the overrunning clutch 5. In the conventional device having such a structure, when the stopper 13 is attached to the output rotary shaft 1, first, the stopper 13 is attached.
Is inserted into the space 12, and then the stop ring 15 is inserted into and fitted into the ring groove 14 using a tool, and in this state, the pinion drive shaft 4 is moved forward. With this,
The stopper 13 abuts on the stepped portion 11 of the pinion drive shaft 4 and is pushed and moved forward, and the stopper 13 is press-fitted into the stopper ring 15 and fitted and fixed.

Next, the operation will be described. By turning on the start switch (not shown), the electromagnetic switch is turned on and the motor is energized.
The armature rotation shaft 3 rotates and the output rotation shaft 1 is driven.
At the same time, the plunger of the electromagnetic switch is attracted, whereby the lever 16 rotates, and the overrunning clutch 5 and the pinion drive shaft 4 move forward. At this time, since the step portion 11 of the pinion drive shaft 4 contacts the rear end of the stopper 13, the axial position thereof is restricted, and the pinion 6 meshes with a ring gear of an engine (not shown) to start the engine.

[Problems to be solved by the invention]

The conventional pinion stopper device of the starter is configured as described above, and the stopper 13 and the stopper ring 15 are located inside the tip of the pinion 6. For this reason,
When the stopper 13 is attached, the space 12 is extremely small, so it is difficult to fix the stopper ring 15 in the ring groove 14, and when the starter is disassembled and inspected, or the parts are replaced, the stopper 13 and stopper 15 must be removed. It is necessary to remove the stopper 13, but the stopper 13 uses a jig to output 1
It can be easily separated from the stop ring 15 by hitting from the front. However, since the stopper ring 15 fitted in the ring groove 14 has to be taken out from the space 12 having a small interval in front of the output rotary shaft 1, there has been a problem that the removing work is very troublesome.

The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to obtain a starter pinion stopper device in which the stopper can be easily attached and detached and the stopper can be protected.

(Means for Solving Problems) A pinion stopper device for a starter according to the present invention is provided with a stopper ring for positioning the stopper near the pinion end surface of the output rotary shaft and projecting from the pinion end surface to the pinion end surface. The flange portion is formed as a cylindrical portion having a length substantially equal to the protruding length of the stopper and having an inner diameter larger than the large diameter portion of the pinion drive shaft.

[Action]

In this invention, since the stop ring is located near the end face of the pinion, the stop ring can be removed in a portion wider than the space, and therefore the removal work can be easily performed. Further, the stopper protruding from the end face of the pinion is protected by the collar portion.

〔Example〕

FIG. 1 is a sectional view of a pinion stopper device for a starter according to an embodiment of the present invention. In the figure, reference numeral 17 denotes a ring groove formed at the end face position of the pinion 6 of the output rotary shaft 1 protruding from the tip end position of the pinion 6, and the stop ring 15 is fitted therein. Further, a stopper 13 is engaged with the stopper ring 15 as in the conventional case, and therefore, the stopper 13 has substantially half its entire length protruding from the end face of the pinion 6. Reference numeral 18 denotes a ring-shaped collar portion extending from the end surface of the pinion drive shaft 4 by a length equal to the protruding length of the stopper 13, and the inner diameter thereof is formed to be larger than the inner diameter of the large diameter portion 10. 19
Is a dustproof cap fitted to the inner circumference of the collar portion 18 and closes the tip of the collar portion 18. Further, each of the other configurations is the same as that of the conventional apparatus shown in FIG.

In the pinion stop device of the starter configured as described above, the engine starting operation is performed by rotating the pinion drive shaft 4 and moving forward and engaging the pinion 6 with the ring gear of the engine, as in the conventional case. The stopper 13 also regulates the axial position of No. 4. Next, when attaching the stopper 13 to the output rotary shaft 1, first
Insert 13 into the space 12 from the inner circumference of the collar 18, then insert the stop ring 15 into the ring groove 14 on the inner circumference of the collar 18 using a tool, and in this state, fit the pinion drive shaft. Move 14 forward. Along with this, the stopper 13 comes into contact with the step portion 11 of the pinion drive shaft 4 and is pushed forward, and the stopper 13 is press-fitted into the stopper ring 15 to be fitted and fixed.

Also, when removing the stopper 13 and stopper 15 for overhauling the starter, etc., first remove the dustproof cap 19 and then strike the stopper 13 from the front of the output rotary shaft 1 with a jig etc. The engagement is disengaged and the space 12 is loosely fitted. Next, the stop ring 15 is taken out from the ring groove 17 in the front direction of the output rotary shaft 1 using a jig or the like, and then the stop 13 and the pinion drive shaft 4 are pulled out from the output rotary shaft 1. When the stopper ring 15 is attached and detached as described above, since the stopper ring 15 is located immediately below the end face of the pinion 6 and there is a space between the stopper ring 15 and the inner wall of the collar portion 18, the attaching and detaching work can be easily performed. . Further, since the collar portion 18 is provided so as to project from the end face of the pinion 6, the stopper 13 is protected from the outside by the collar portion 18, so that there is no fear of damage or dropout of the stopper 13. Further, since the open end of the collar 18 is closed by the dustproof cap 19, foreign matter is prevented from entering the space 12 and the like, and the durability is improved.

In the above embodiment, the stop ring 15 is installed immediately below the end face of the pinion 6 and the protrusion length of the collar portion 18 is equal to the protrusion length of the stopper 13, but the present invention is not limited to these dimensions. The stop ring 15 is located near the end face of the pinion 6 and the protruding length of the collar portion 18 depends on the stop 13
If the projecting length is approximately equal, the same effect as in the above embodiment can be obtained.

[Effect of device]

As described above, according to the present invention, the stop ring is disposed at the extension part of the stop ring extended so that the output rotary shaft projects from the end face of the pinion, and the end face of the pinion has a length substantially equal to the extension part and the pinion. Since a cylindrical part having an inner diameter larger than the large diameter part of the stopper is formed, the space at the outer peripheral part of the stopper is widened, the stopper can be easily attached and detached, and the stopper protects the stopper from the outside. As a result, it is possible to prevent the stopper from being damaged or falling off.

[Brief description of drawings]

FIG. 1 is a sectional view showing a part of a starter pinion stopper device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a part of a conventional starter pinion stopper device. . 1 ... Output rotary shaft, 4 ... Pinion drive shaft, 6 ... Pinion,
10 ... Large-diameter part, 11 ... step part, 12 ... space part, 13 ... stopper, 15
… Stop ring, 17… Ring groove, 18… Collar part. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A pinion drive shaft which is inserted into an outer side of an output rotary shaft driven by an electric motor and slides in the axial direction of the output rotary shaft. The pinion drive shaft is provided at the tip of the pinion drive shaft and integrally rotates. A pinion, a large diameter part formed on the inner circumference of the pinion drive shaft by a predetermined length from the tip, and forming a space between the pinion drive shaft and the output rotary shaft, a ring groove provided on the output rotary shaft And a stopper for engaging the stopper ring and abutting against the stepped portion at the end of the large diameter portion when the pinion drive shaft moves forward, and limiting the forward movement of the pinion drive shaft. In a starter pinion stop device for a starter, an extension is provided to extend the output rotation shaft so as to project from the end face of the pinion, and the stop ring is provided in the extension, and the pinion end is provided. Starter pinion Sutotsu path and wherein the forming the cylindrical portion having an inner diameter larger than the large diameter portion of the length substantially equal to the length and the pinion of the extension portion.