JP2532691C - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a starter motor for an internal combustion engine, and more particularly to an engageable gear device for connecting a starter motor to an engine. <Prior Art> Conventionally, as shown in U.S. Pat. Nos. 4,356,735, 4,510,406, 4,525,632, and 4,590,811, internal combustion An electric starter motor used in an engine usually has a solenoid pinion gear that slides along a rotary drive output shaft and engages a driven gear of the engine. When the driven gear is engaged, the motor section is excited, and the pinion gear is driven to rotate via the pinion clutch mechanism to rotate the driven gear and start the engine. As shown in the above-mentioned U.S. Pat., The starter motor is mounted such that the housing portion of the starter motor has an open area, and the driven gear extends into the housing and the pinion gear is slidably engaged with the driven gear. I agree. <Means for Solving the Problems> In recent years, the space available for mounting the starter motor on the engine has been reduced, and therefore, a degree of freedom is required for the mounting. Even in the engine to which the present invention relates, the conventional starter motor cannot be mounted on the engine. That is, in the engine, the driven gear extends into the housing and cannot be engaged with the pinion gear. The present invention enables a conventional starter motor to be incorporated when it is desired to establish communication between the sliding pinion gear and the driven gear of the engine when the mounting conditions directly limit the mounting. This is achieved by using a movable idler gear that moves with the pinion gear and can actually engage the driven gear. Accordingly, it is an object of the present invention to provide an engine starter motor in which a pinion gear slidable via an idler gear that moves with the pinion gear and engages a driven gear of the engine transmits the rotational force to the engine. . Another object of the present invention is to provide an idler gear slidable to be disengaged from a driven gear by engagement movement of a pinion clutch. In order to achieve the above-mentioned object, a starter motor for an engine having a driven gear according to the present invention is an electric motor and an output shaft partially having external spline teeth, and is rotated by the motor around its axis. An overrunning clutch mounted on the output shaft so as to be continuously engaged with the spline teeth; and an overrunning clutch rotated by the clutch and together with the clutch. A pinion gear attached to the output shaft and coupled to the clutch so as to slide in parallel with the rotation axis; and a clutch for sliding the clutch and the pinion gear along the output shaft. Connected means, a fixed pin mounted parallel to the output shaft, and a toothed portion which is continuously engaged with the teeth of the pinion gear. An idler gear slidably mounted on the fixed pin having a toothless portion continuously engaged with the clutch for rotational movement relative to the pin in direct response to rotational movement of the pinion gear. A plastic member disposed between the clutch and the toothless portion of the idler gear, wherein the plastic member is configured to slide with the clutch along the pin to mesh with the driven gear; Wherein the plastic member comprises a plastic sleeve mounted around the fixing pin and having a first flange and a second flange;
The idler gear slides along the fixing pin via the flange when the clutch slides. In the starter motor of the present invention, the “over-running (overrunning) clutch 51
A plastic member 66 is disposed between the idler gear 62 and the toothless portion of the idler gear 62;
The plastic member comprises a plastic sleeve mounted around the fixing pin 60 and having a first flange and a second flange. When the clutch 51 slides, the idler gear 62 is connected to the fixing pin 60 via the flange. So that impact and friction between the clutch and the toothless portion of the idler gear can be minimized. <Detailed Description of the Invention> In FIG. 1, a starter motor 10 embodying the present invention is shown in a non-excited state. In this state, the driven gear 100 extending to the internal combustion engine (not shown) is not engaged with the starter motor 10. The driven gear 100 usually forms a part of a flywheel in the internal combustion engine, is engaged with a starter motor, and is driven during a start operation of the engine. As described above, the conventional starter motor has the pinion gear 56 that can be engaged with the driven gear 100. However, as shown in FIG. 1, the mounting position of the motor 10 has a large space in that area, and the pinion gear 56 is
00 was not engaged. According to the present invention, the idler gear 62 is provided between the pinion gear 56 and the driven gear 100 to solve the above-mentioned problem. The following description relates to the details of the preferred mechanism, and describes how the idler gear 62 moves to engage and disengage the driven gear 100 in response to the linear and rotational movement provided to the pinion gear 56. The starter drive end housing 1 is fixed to the housing of the motor 10 and supports various members. The socket 4 formed in the end housing 1 has a bearing 5
Work as a second sheet. The starter output shaft 50 mounted thereon is rotated by the bearing 52. Starter output shaft 50 is connected in a conventional manner to a planetary gear drive mechanism (not shown) within the housing of motor 10. An electric motor section (not shown) is also within the housing and provides rotational drive directly to the planetary gear drive mechanism and to a starter output shaft 50 that rotates about a longitudinal axis. Starter output shaft 5
0 has a pair of outer spline teeth 65 at the opposite end of the bearing 52 and has a retaining ring 54 near the bearing 52. Bearing 58 surrounds a portion of output shaft 50 between spline teeth 65 and retaining ring 54. The bearing 58 is retained within the starter drive pinion gear 56 to achieve low friction sliding movement of the pinion gear 56 along the output shaft 50. The pinion gear 56 also has a circumferential groove 45 between the shank portion 48 and the tooth portion of the pinion gear 56. The overrun clutch 51 is supported by the circumferential groove 45 of the pinion gear 56, the washer 55, and the shank 48, and has a pair of friction rollers 53 that are spring-biased in a conventional manner to make the rotation of the pinion gear 56 in one direction. doing. The overrun clutch 51 further has a metal seal 57 and internal teeth 59 that mesh with spline teeth 65 of the output shaft 50. The clutch 51 and the pinion gear 56 are controllably positioned along the output shaft 50 by movement of the lever 40 connected to the clutch 51 (see FIG. 3). The starter motor 10 includes a solenoid actuator 11 having electric terminal posts 12,14. The lever 40 is pivotally mounted in the housing so as to be driven by the solenoid 11. The solenoid 11 has a plunger 16 which is spring-biased outward when the solenoid 11 is de-energized (FIG. 1) and retracts inward when the solenoid 11 is energized. The cavity in plunger 16 has a spring 18 that biases ring 20 outwardly on pin 24. The pin 24 has a stopper 22 formed at its outer end, and the upper part of the lever 40 is
1 and 2 and move when the plunger 16 moves between the first and second positions as shown in FIGS. 1 and 2, respectively. The pivot cam portions 44 and 46 of the lever 40 are in contact with the parallel surfaces 2 and 30. The idler gear 62 is mounted via a sliding bearing 63 on a fixed pin 60 caulked in a hole 6 formed in the housing 1. The pin 60 is mounted substantially parallel to the axis of the rotatable shaft 50, and the idler gear 62 moves in the same direction with the idler gear 56. The idler gear 62 has an extension shank 64 in which a double flange sleeve 66 is held by a spring clip 61. The double flange sleeve 66 as a plastic member has a concave portion 68 at a position for receiving a part of the clutch 51 extending outward beyond the size of the pinion gear 56. In FIG. 2, the device of the present invention is in an excited state, and the idler gear 62
It is engaged with the driven gear 100 and is brought into a rotatable driving state by the output shaft 50, the clutch 51 and the pinion gear 56. Of course, the idler gear 62 is driven by the excitation of the solenoid 11 that pulls the top 42 of the lever 40 and the pin 24 to the left.
Move to engage with 00. The movement of the top 42 of the lever 40 causes the bottom 49 to move rightward, causing the clutch 51 and the idler gear 56 to move along the output shaft 50. Since the clutch 51 is engaged with the double flange sleeve 66 on the idler gear 62, the idler gear 62 moves along the pin 60 to engage the driven gear 100. When the energization of the solenoid is stopped, the idler gear returns to the first position shown in FIG. FIG. 3 shows the yoke 48 pivotally connected to the clutch 51 at points 47, 49 extending from the lever 40. The pinion gear 56 is continuously connected to the idler gear 62, and rotates the idler gear 62 in the opposite direction. Therefore, after the idler gear 62 moves to engage with the driven gear 100, the rotation of the motor drive output shaft 50 is transmitted from the spline teeth 65 to the clutch 51 and the pinion gear 56. The idler gear 62 rotates in the opposite direction to the pinion gear 56, and rotates the driven gear 100 in the same direction as the pinion gear 56. According to the above-described invention, the flexibility of mounting the starter motor 10 in the engine compartment is provided by a movable idler gear between the pinion gear 56 and the driven gear 100. Changing the starter motor to have the effect of the present invention means changing the direction by rotation of the motor so that a predetermined driving direction is output to the driven gear. It will be apparent to those skilled in the art that many modifications are possible within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially sectional elevational view showing a starter motor of the present invention detached from a driven gear, and FIG. FIG. 3 shows a portion of the starter motor, and FIG. 3 is a cross-sectional view of a portion of the starter motor of the present invention along line 3-3 in FIG. DESCRIPTION OF SYMBOLS 1 ... Starter drive end housing, 4 ... Socket, 10 ... Starter motor, 11
... solenoid, 16 ... plunger, 20 ... ring, 24 ... pin, 40 ... lever, 50 ... output shaft, 51 ... clutch, 56 ... pinion gear, 60 ... fixed pin, 62
... idler gear, 100 ... driven gear.

Claims (1)

Claims 1. A starter motor for an engine having driven gears, comprising an electric motor and an output shaft having external spline teeth in part, the output shaft being rotated by the motor about its axis. An over-rotation clutch mounted on the output shaft so as to be continuously engaged with the spline teeth; and an over-rotation clutch rotated by the clutch and slid together with the clutch in parallel with a rotation axis of the output shaft. A pinion gear attached to the output shaft and connected to the clutch, and a means connected to the clutch for slidingly moving the clutch and the pinion gear along the output shaft; A fixed pin mounted in parallel with the output shaft, a tooth portion continuously engaged with the teeth of the pinion gear, and a non-continuous engagement with the clutch; A idler gear slidably mounted on the fixed pin and a part,
A clutch configured to slide with the clutch along the pin to mesh with the driven gear for rotational movement relative to the pin in response to rotational movement of the pinion gear; and the clutch and the idler. anda plastic member disposed between said non-toothed portion of the gear, the plastic member, the first flange及mounted around the fixed pin
And a plastic sleeve having a second flange, wherein the clutch slides.
The idler gear slides along the fixing pin through the flange when
A starter motor that is adapted to run.