JPH05968U - Mounting structure for starter motor device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The layout of the starter motor device is compact and the weight of the starter motor device is reduced. [Structure] Torque converter housing 6 connected between transmission case 7 and cylinder block 5
A ring gear 4 that connects the torque converter 8 and the engine output shaft is provided therein. The motor portion 1 of the starter motor device S that drives the ring gear 4 is disposed in a step portion A formed between the outer peripheral surface of the housing 6 and the outer peripheral surface of the case 7, and is fixedly attached to the end wall of the housing 6. Shaft 2
The stepped portion A is inserted into the housing 6 from the open portion B of the end surface of the housing 6. The pinion gear 10 provided on the shaft 2 is directly meshed with the ring gear 4. The tip of the shaft 2 is supported by a tapered roller bearing device 14 which is integrally provided on the wall of the cylinder block 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a starter motor device for an engine, and more particularly to a technique for simplifying a mounting structure of the starter motor device.

[0002]

[Prior Art]

 Conventionally, when there is no space for mounting the starter motor device on the engine side, the starter motor device is mounted on the torque converter side. An example of a mounting structure of this starter motor device is shown in FIG. In this figure, in a housing 6 of a torque converter 8 which is connected between a transmission case 7 and a cylinder block 5, a ring gear 4 which connects the torque converter 8 and an engine output shaft (not shown) is arranged. For example, as disclosed in Japanese Utility Model Publication No. 59-6286, the ring gear 4 is elastically supported by the torque converter 8 through a vibration absorbing mechanism and is rigidly supported by the engine output shaft.

The motor unit 1 of the starter motor device S that drives the ring gear 4 is disposed and attached to the outer peripheral portion of the torque converter housing 6. A shaft 2 of the starter motor device S extends in a direction in which a cylinder block 5 is present, and a pinion gear 10 provided on the shaft 2 meshes with the ring gear 4 via an idler gear 9. The tip portion of the shaft 2 is supported by a metal bearing portion 11 provided on a support bracket 12 attached to the starter motor device S.

[0004]

[Problems to be solved by the device]

 However, such a conventional starter motor device mounting structure has the following problems. That is, since the motor part 1 is attached to the outer peripheral surface of the torque converter housing 6, the motor part 1 is in a state of protruding from the outer peripheral part of the housing 6, and the shape around the housing 6 lacks smartness. The device S cannot be stored in a compact layout.

When the motor unit 1 is mounted on the outer peripheral surface of the housing 6 as described above, the pinion gear 10 does not reach the ring gear 4 because the outer diameter of the pinion gear 10 is smaller than the outer diameter of the starter motor device S. As described above, it becomes necessary to interpose the idler gear 9, and the weight of the starter motor device S is increased by the addition of the idler gear 9. Further, since the support bracket 12 provided with the metal bearing portion 11 is attached to the starter motor device S, the weight of the starter motor device S also increases.

In view of the conventional problems as described above, the present invention improves the mounting structure of the starter motor device so that the starter motor device is compactly laid out and the weight of the starter motor device is reduced. The purpose is to reduce

[0007]

[Means for Solving the Problems]

 For this reason, the mounting structure of the starter motor device of the present invention is arranged in the housing of the torque converter connected between the transmission case and the cylinder block, and the ring gear for connecting the torque converter and the engine output shaft. A mounting structure for a starter motor device for driving a starter motor device, wherein the motor part of the starter motor device is positioned and mounted on a step portion formed between the outer peripheral surface of the torque converter housing and the outer peripheral surface of the transmission case. The shaft of the starter motor device is inserted into the housing from the opening of the torque converter housing end face at the stepped portion, and the pinion gear provided on the shaft is meshed with the ring gear, and the tip of the shaft is connected to the cylinder block and the torque. With converter housing Was Unishi I which bears at a bearing device provided on the inner wall of the formed space.

[0008]

[Action]

 With this structure, the starter motor device is mounted after the cylinder block, the torque converter housing, and the transmission case have been assembled. In this case, the shaft of the starter motor device is inserted into the housing from the opening of the end face of the torque converter housing, the tip of the shaft is inserted into the bearing device, and the pinion gear and ring gear are meshed with each other, and finally the motor part is fixed. I do.

Further, since the motor portion is arranged and fixedly mounted on the step portion formed between the outer peripheral surface of the torque converter housing and the outer peripheral surface of the transmission case, the motor portion projects from the outer peripheral portion of the housing. The starter motor device can be housed in a compact layout because the shape around the housing does not change and the pinion gear reaches the ring gear. Therefore, the pinion gear and the ring gear can be directly meshed with each other.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the drawings referred to below, the same elements as those in FIG. 3 are designated by the same reference numerals to simplify the description. In FIG. 1, in a torque converter housing 6 connected between a transmission case 7 and a cylinder block 5, a ring gear 4 that connects a torque converter 8 and an engine output shaft is arranged. Is.

The motor portion 1 of the starter motor device S that drives the ring gear 4 is disposed in a step portion A formed between the outer peripheral surface of the torque converter housing 6 and the outer peripheral surface of the transmission case 7, and the housing 6 has an end. It is fixedly attached to the wall. The shaft 2 of the starter motor device S is inserted into the housing 6 from the open portion B of the end surface of the torque converter housing 6 at the stepped portion A. The pinion gear 10 provided on the shaft 2 is directly meshed with the ring gear 4. The tip of the shaft 2 is supported by a bearing device provided on the inner wall of the space C formed by the cylinder block 5 and the torque converter housing 6.

In this embodiment, the tapered roller bearing device 14 is integrally provided on the wall of the cylinder block 5. That is, a concave portion 13 formed in a conical tapered surface is provided on the wall surface of the cylinder block 5, the roller 3 of the tapered roller bearing device is inserted into the concave portion 13, and the shaft 2 formed in the conical tapered surface inside the roller 3. Insert the tip.

In this case, the recess 13 of the cylinder block 5 functions as an outer race of the bearing device 14. In such a structure, the starter motor device S is mounted after the cylinder block 5, the torque converter housing 6, and the transmission case 7 are assembled.

In this case, the shaft 2 of the starter motor device S is inserted into the housing 6 from the open portion B of the end face of the torque converter housing 6, and the tip end of the shaft 2 is inserted inside the roller 3 while the pinion gear 10 and the ring gear are inserted. 4 mesh, and finally the motor part 1 is fixed. At this time, since the tapered roller bearing device 14 serves as a guide, even if the shaft 2 is long, the pinion gear 10 and the ring gear 4 can be smoothly engaged with each other without causing shaft runout.

According to this structure, the motor unit 1 is arranged and fixedly mounted on the step portion A formed between the outer peripheral surface of the torque converter housing 6 and the outer peripheral surface of the transmission case 7. Since the motor portion 1 does not project from the outer peripheral portion of the housing 6 and the shape of the housing 6 is smart, the starter motor device S can be compactly laid out.

Further, as a result of housing the motor unit 1 in the stepped portion A in this way, the pinion gear 10 reaches the ring gear 4, and as described above, the pinion gear 10 and the ring gear 4 can be directly meshed with each other. Since the conventional idler gear can be eliminated, the weight of the starter motor device S can be reduced. In particular, according to the present embodiment, since the tip of the shaft 2 is supported by the bearing device 14 integrally provided on the cylinder block 5, the bearing bracket of the bearing device as shown in FIG. 3 is unnecessary, and The weight of the starter motor device S can be reduced, and the support rigidity of the shaft 2 can be improved.

Since the bearing device 14 is provided on the cylinder block 5 fixed to the housing 6 to which the motor unit 1 is attached, the bearing device 14 is attached to obtain the required accuracy of the engagement between the pinion gear 10 and the ring gear 4. Position accuracy can be improved. FIG. 2 shows another embodiment of the present invention. In this embodiment, a taper roller bearing device 14 is provided on the wall of the torque converter housing 6.

That is, a support piece extending forwardly of the tip of the shaft 2 is integrally formed on the wall of the housing 6, and the support piece 6 A is provided with a concave portion 13 formed in a conical tapered surface. The roller 3 of the tapered roller bearing device 14 is inserted, and the tip of the shaft 2 formed into a conical tapered surface is inserted inside the roller 3. The cylinder block 5 has a wall surface provided with a recess 5A into which the support piece 6A is inserted.

In this case, the recess 13 of the support piece 6 A functions as an outer race of the bearing device 14. In such a structure, the starter motor device S is mounted after the cylinder block 5, the torque converter housing 6, and the transmission case 7 are assembled.

In particular, in this embodiment, since the bearing device 14 is provided on the housing 6 to which the motor unit 1 is attached, the mounting position of the bearing device 14 for obtaining the required accuracy of meshing between the pinion gear 10 and the ring gear 4 The accuracy can be further improved. Since the bearing device 14 is provided directly on the wall of the cylinder block 5 in the embodiment of FIG. 1, it is not necessary to form the support piece 6A of the housing 6 as in the embodiment of FIG. 2, which is advantageous in processing. ..

As described above, the present invention has been described with reference to the specific embodiments, but the present invention is not limited to this, and is attached to the present invention by a person skilled in the art. It should be noted that various changes and modifications can be made without departing from the scope of the utility model registration claim.

[0022]

[Effect of the device]

 As described above, according to the present invention, the motor portion of the starter motor device is arranged and fixedly mounted on the stepped portion formed between the outer peripheral surface of the torque converter housing and the outer peripheral surface of the transmission case. The pinion gear provided on the shaft is meshed with the ring gear, and the shaft tip is supported by the bearing device provided on the inner wall of the space formed by the cylinder block and the torque converter housing. The layout is compact and the weight of the starter motor device can be reduced, and the supporting rigidity of the shaft can be improved, which is a practical effect.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of a mounting structure for a starter motor device according to the present invention.

FIG. 2 is a vertical sectional view of another embodiment.

FIG. 3 is a vertical sectional view of an example of a conventional starter motor device mounting structure.

[Explanation of symbols]

 1 Motor part 2 Shaft 4 Ring gear 5 Cylinder block 6 Torque converter housing 6A Support piece 7 Transmission case 8 Torque converter 10 Pinion gear 14 Bearing device A Stepped part B Opening part C Space part S Starter motor device

Claims (1)

[Claims for utility model registration] 1. A ring gear, which is arranged in a housing of a torque converter connected between a transmission case and a cylinder block and connects the torque converter and an engine output shaft, is driven. A mounting structure of a starter motor device, wherein the motor part of the starter motor device is positioned and mounted on a step portion formed between the outer peripheral surface of the torque converter housing and the outer peripheral surface of the transmission case. Inserting the shaft of the shaft into the housing from the open end of the torque converter housing at the step, and engaging the pinion gear provided on the shaft with the ring gear.
A mounting structure for a starter motor device, characterized in that a tip end portion of the shaft is supported by a bearing device provided on an inner wall of a space formed by the cylinder block and the torque converter housing.