JP2009142935A - Planetary pinion assembling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly assembly a planetary pinion to a carrier, while engaging the planetary pinion with the previously assembled planetary pinion, in a planetary pinion assembling device. <P>SOLUTION: A short pinion 3 is inserted in the carrier setting position with a centering part 50 nearly V-shaped when viewed in a plane, and with an insertion jig 49 having a pinion rotary jig 52 disposed at the nearly V-shaped groove center. When the teeth tips of the short pinion 3 come in contact with the teeth tips of the long pinion 2 (Fig. 1(A)), the short pinion 3 slightly moves along the flat part 53 of the pinion rotary jig 52 to release the contact between the teeth tips (Fig. 1(B)). Then, when the teeth tips of the short pinion 3 are engaged with the teeth grooves of the engaging part 54 of the pinion rotary jig 52, the short pinion 3 slightly rotates (Fig. 1(C)). When the insertion jig 49 further advances in this state, the teeth tips of the short pinion 3 are smoothly engaged with the teeth grooves of the long pinion 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a planetary pinion assembling apparatus for assembling a planetary pinion to a carrier of a planetary gear mechanism used in an automatic transmission of an automobile or the like.

When assembling a planetary pinion to a carrier of a planetary gear mechanism in an assembly process of an automatic transmission of an automobile, conventionally, as described in Patent Document 1, for example, a dummy shaft is inserted into a planetary pinion on which a needle bearing is set. Then, the pinion assembly temporarily attached with washers attached to both ends is supplied to the carrier set in the pinion assembling apparatus, and the pinion shaft is pressed into the shaft hole of the carrier while pushing out the dummy shaft. The extruded dummy shaft is collected and reused.
Japanese Patent No. 2856673

  However, the planetary pinion assembling apparatus using the conventional dummy shaft has the following problems. Since the dummy shaft is used, a recovery device is required, and the dummy shaft is deteriorated and becomes a consumable product, which is expensive. Further, when the pinion shaft is press-fitted into the carrier, the pinion shaft, the carrier, and the dummy shaft need to be positioned accurately and concentrically, so that complicated and high-precision equipment is required.

  For example, in the case where a pair of planetary pinions are engaged with each other, such as a Ravigneaux type planetary gear mechanism, the one planetary pinion is assembled to the carrier and then the other planetary pinion is attached first. It is necessary to insert into the carrier and position it while meshing with one planetary pinion assembled to the pinion shaft, and to insert the pinion shaft therethrough.

  At this time, due to space limitations of the planetary gear mechanism, when the gap between the planetary pinion previously assembled and the carrier is small, when assembling the subsequent planetary pinion, when the tooth tips of both planetary pinions are in contact, The planetary pinion to be assembled later interferes with the carrier and cannot be smoothly assembled.

  The present invention has been made in view of the above points, and provides a planetary pinion assembling apparatus that can smoothly assemble a planetary pinion to be assembled later while meshing with a planetary pinion that has been previously assembled with a carrier. The purpose is to provide.

In order to solve the above-described problems, the present invention provides a planetary gear mechanism with a pinion assembly having a washer provided at the end of a planetary pinion, and press-fits the pinion shaft into the shaft hole of the carrier. In the planetary pinion assembling apparatus for assembling the pinion assembly to the carrier,
An existing assembly in which the planetary pinion is already assembled to the carrier by an insertion jig that abuts on the pinion assembly placed on the feeding table and pushes the planetary pinion and the washer substantially concentrically. A pinion feeding section that positions the pinion assembly on the carrier while meshing with the planetary pinion of
A shaft assembly that inserts the pinion shaft into a pinion assembly disposed in the carrier and press-fits into the shaft hole of the carrier,
The insertion jig is opposed to the planetary pinion teeth at a substantially V-shaped centering portion in a plan view that contacts the planetary pinion and the side portion of the washer, and a substantially V-shaped groove central portion of the centering portion. A pinion rotating jig having a flat portion formed on one side that is the planetary pinion side and a meshing portion that can mesh with a tooth tip of the planetary pinion formed on the other side along a plane to be The centering portion is provided such that the planetary pinion can be moved in a lateral direction in contact with the pinion rotating jig.

(Aspect of the Invention)
In the following, some aspects of the invention that can be claimed in the present invention (hereinafter sometimes referred to as “claimable invention”) will be exemplified and described. As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combinations of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description accompanying each section, the description of the embodiments, etc., and as long as the interpretation is followed, another aspect is added to the form of each section. In addition, an aspect in which constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention. The following contents (1) to (3) correspond to claims 1 to 3.

(1) A planetary pinion in which a pinion assembly provided with a washer at the end of a planetary pinion is disposed on the carrier of the planetary gear mechanism, the pinion shaft is press-fitted into the shaft hole of the carrier, and the pinion assembly is assembled to the carrier. In assembly equipment,
An existing assembly in which the planetary pinion is already assembled to the carrier by an insertion jig that abuts on the pinion assembly placed on the feeding table and pushes the planetary pinion and the washer substantially concentrically. A pinion feeding section that positions the pinion assembly on the carrier while meshing with the planetary pinion of
A shaft assembly that inserts the pinion shaft into a pinion assembly disposed in the carrier and press-fits into the shaft hole of the carrier,
The insertion jig is opposed to the planetary pinion teeth at a substantially V-shaped centering portion in a plan view that contacts the planetary pinion and the side portion of the washer, and a substantially V-shaped groove central portion of the centering portion. A pinion rotating jig having a flat portion formed on one side that is the planetary pinion side and a meshing portion that can mesh with a tooth tip of the planetary pinion formed on the other side along a plane to be The planetary pinion assembling apparatus is provided, wherein the centering portion is arranged so that the planetary pinion can move in a lateral direction in contact with the pinion rotating jig.
With this configuration, the planetary pinion and the washer are maintained substantially concentric by abutting a substantially V-shaped centering portion in plan view of the insertion jig to the side surface portion, and the planetary pinion is kept in the assembled planetary. When the tooth tips of both planetary pinions come into contact with each other when meshing with the pinion, the planetary pinion moves along the flat part of the pinion rotation jig, releasing the contact between the tooth tips and the pinion rotation treatment. It is slightly rotated by meshing with the meshing portion of the tool, and meshed with the existing planetary pinion. Thus, the pinion shaft can be press-fitted by arranging the pinion assembly on the carrier while smoothly meshing the planetary pinion with the existing planetary pinion.
An example of a planetary gear mechanism having a structure in which a planetary pinion is assembled to a carrier while meshing with an existing planetary pinion is a Ravigneaux type planetary gear mechanism.
(2) In the configuration of (1) above, the shaft assembly portion is
A holding member that holds the carrier; and a guide pin that has a pointed portion and is movable between a retracted position and a protruding position, and the guide pin is disposed on the carrier when moved to the protruding position. A positioning centering portion that is inserted through the shaft hole of the assembly and the carrier to position them concentrically;
A shaft holder that holds the pinion shaft and floats and supports the pinion shaft so as to face the shaft hole of the carrier. When the guide pin moves to the protruding position, the guide pin is inserted into a centering hole provided at an end of the pinion shaft. A planetary pinion assembly comprising: a shaft press-fitting portion for engaging the pinion shaft with the pinion shaft so that the pinion shaft is positioned concentrically with the guide pin and press-fitting the pinion shaft into the shaft hole of the carrier. apparatus.
With this configuration, the planetary pinion, washer, the carrier shaft hole and the planetary shaft are securely arranged concentrically by moving the guide shaft of the positioning centering portion to the protruding position, and the planetary shaft is placed on the carrier. It can be pressed in smoothly. At this time, the planetary shaft floatingly supported by the holder is adjusted to a concentric position by engaging the tip end portion of the guide pin with the centering hole, so that the dimensional accuracy required for each portion can be relaxed.
(3) In the configuration of (2), the positioning centering portion includes an indexing mechanism for sequentially indexing a plurality of assembly positions to which the pinion assembly is assembled by rotating the carrier. Planetary pinion assembly device.
With this configuration, a plurality of pinion assemblies of the same type or different types can be sequentially assembled to the carrier.

  According to the planetary pinion assembling apparatus according to the present invention, the planetary pinion to be assembled later can be smoothly assembled to the carrier while meshing with the planetary pinion previously assembled.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 5, the planetary pinion assembling apparatus according to the present embodiment includes a long planetary pinion 2 (hereinafter referred to as carrier 1) and a planetary carrier 1 (hereinafter referred to as carrier 1) of a Ravigneaux type planetary gear mechanism used in an automatic transmission of an automobile. , Long pinion 2) and short planetary pinion 3 (referred to as short pinion 3).

  Both ends of the pinion shaft 4A of the long pinion 2 are press-fitted, and the carrier 1 is disposed between a pair of annular plate portions 5 and 6 that support these and the plate portions 5 and 6. An annular intermediate plate portion 7 that supports the pinion shaft 4B by disposing the short pinion 3 therebetween, and a cylindrical spline portion 8 that is integrally formed with one plate portion 5 are provided. In the plate portions 5 and 6, six shaft holes 9 and 10 for press-fitting the pinion shafts 4A and 4B are arranged along the circumferential direction. The intermediate plate portion 7 is provided with three shaft holes 11 through which the pinion shaft 4B of the short pinion 3 is inserted and three notches 12 through which the long pinion 2 is inserted along the circumferential direction. The plate portions 5 and 6 and the intermediate plate portion 7 are provided with leg portions 5A and 5B extending along the axial direction so as not to interfere with the long pinion 2 and the short pinion 3 on their outer peripheral portions. Are connected to each other.

  The long pinion 2 has two needle bearings 13 and a spacer 14 arranged between them inserted and fitted, and washers 15 are arranged at both ends, and the pinion is press-fitted into the plate parts 5 and 6 of the carrier 1. The shaft 4A is rotatably supported. The short pinion 3 is fitted with a needle bearing 13, and washers 15 are arranged at both ends, and is rotatably supported by a pinion shaft 4 </ b> B press-fitted into the plate parts 5 and 6 and the intermediate plate part 7 of the carrier 1. . The three long pinions 2 and the short pinions 3 are alternately arranged at equal intervals and meshed with each other.

  As shown in FIGS. 9 and 10, the planetary pinion assembly device 16 sets the carrier 1 and positions the long pinion 2 and the short pinion 3 and the shaft holes 9 and 10 assembled to the carrier 1 concentrically. Centering portion 17, shaft press-fit portion 18 for press-fitting pinion shafts 4 </ b> A and 4 </ b> B into carrier 1, long pinion feed portion 19 for feeding long pinion 2 to the assembly position of carrier 1, and short pinion 3 as carrier 1 And a short pinion feeding unit 20 for feeding to the assembly position. The positioning center rig portion 17 and the shaft press-fit portion 18 constitute a shaft assembly portion.

  The positioning centering unit 17 is configured as follows. A holding member 22 having a fitting recess 21 into which the spline portion 8 of the carrier 1 is fitted is supported by a bearing 24 so as to be rotatable with respect to a base 23. An indexing mechanism 25 is connected to the holding member 22, and the holding member 22 is rotated by the indexing mechanism 25 so that the three long pinions 2 of the carrier 1 are assembled and the three short pinions 3 are assembled. The position can be sequentially fixed while facing the long pinion feeding unit 19 and the short pinion feeding unit 20 arranged on both sides of the positioning centering unit 17.

  Around the fitting recess 21 of the holding member 22, six concentric guide holes 26 are formed in each of the six shaft holes 9 of the plate portion 5 of the carrier 1. A guide pin 27 is inserted into the guide hole 26 so as to be vertically movable along the axial direction. A tapered pointed portion 28 is formed at the upper end portion of the guide pin 27. The guide pin 27 is urged downward by the spring force of the coil spring 29, and is normally in the storage position indicated by a solid line in FIG. 10, and by pushing up the lower end by a pusher 30 (described later), FIG. As indicated by the phantom line inside, the pointed portion 28 is inserted upward from the plate portion 6 at the upper end of the carrier 1 through the shaft hole 11 (or notch 12) of the plate portions 5 and 6 of the carrier 1 and the intermediate plate portion 7. Move to the protruding position.

  The pusher 30 is provided to face the lower end portions of the two guide pins 27 positioned at the index positions so as to face the long pinion feeding portion 19 and the short pinion feeding portion 20. When driven, the guide pin 27 moves up and down along the guide rod 32 attached to the base 23 to move the guide pin 27 between the retracted position and the protruding position.

  A pinion positioning guide 34 is erected in the fitting recess 21 of the holding member 22, and a pinion positioning guide 33 is inserted into the upper part of the carrier 1 set on the holding member 22, so that the upper end of the pinion positioning guide 34 is inserted. And the pinion positioning guides 33 and 34 serve as abutments for positioning the long pinion 2 and the short pinion 3 inserted into the assembly position of the carrier 1.

  The shaft press-fit portion 18 has a pair of substantially cylindrical shaft holders 35 that hold the pinion shaft 4A of the long pinion 2 and the pinion shaft 4B of the short pinion 3 that are press-fitted into the carrier 1. The pair of shaft holders 35 are arranged concentrically with respect to the two shaft holes 10 facing the long pinion feeding portion 19 and the short pinion feeding portion 20 when the carrier 1 is fixed at the index position. ing. The shaft holder 35 is floatingly supported on a base plate 36 fixed to the base 23 by a floating bearing 37 so as to be movable within a certain range only in the horizontal direction. A tapered centering hole 38 is formed at the lower end of the pinion shafts 4 </ b> A, 4 </ b> B held by the shaft holder 35 so as to be fitted to the tip 28 of the guide pin 27. Then, the pinion shafts 4A and 4B held by the holder 35 supported by floating are fitted into the guide pins 27 by fitting the pointed end portions 28 of the guide pins 27 moved to the protruding positions into the centering holes 38 of the pinion shafts 4A and 4B. Are reliably positioned concentrically.

  A pair of press-in pushers 39 are provided above the pair of shaft holders 35. The press-in pushers 39 are driven by an air cylinder or the like, and the pinion shafts 4A and 4B held by the shaft holder 35 are pushed down together with the guide pins 27. Thus, the pinion shafts 4A and 4B are press-fitted into the shaft holes 9 and 10 of the long pinion 2 of the carrier 1 and the shaft holes 9 and 10 and 11 of the short pinion 3, respectively.

  The long pinion feeding unit 19 is mounted on the feeding table 40 adjusted to the height of the long pinion assembly position of the carrier 1 set on the holding member 22 of the positioning centering unit 17, and the feeding table 40. An insertion cylinder 41 (such as an air cylinder) for inserting a long pinion assembly W1 (pinion assembly) temporarily assembled with the long pinion 2, needle bearing 13, spacer 14 and washer 15 into the pinion assembly position of the carrier 1, and an insertion cylinder 41 And an insertion jig 43 that pushes the long pinion assembly W1.

  The feeding table 40 is attached to the base 23 via an adjustment shim 40 (see FIG. 4), and the height of the table surface that guides the long pinion assembly W1 by replacing the adjustment shim 40A (see FIG. 4). Can be adjusted. Thus, by arranging the adjustment shim 40A between the feeding table 40 and the base 23, it is possible to prevent the adjustment shim from being worn and deteriorated. The insertion jig 43 is formed with a substantially V-shaped centering portion 44 that comes into contact with the side surface portion of the long pinion 2 of the long pinion assembly W1. The insertion jig 43 is attached with a centering jig 45 having a substantially V-shaped centering portion in plan view that comes into contact with the side surfaces of the upper and lower washers 15 of the long pinion assembly W1.

  When the insertion cylinder 41 is operated and the long pinion assembly W1 is inserted into the assembly position of the carrier 1 by the insertion jig 43, the long pinion 2 and the washer 15 are inserted by the substantially V-shaped centering portion 44 and the centering jig 45. Are adjusted to a substantially concentric position, and the long pinion assembly W1 is substantially positioned at the pinion assembly position of the carrier 1 by abutting the long pinion 2 into the pinion positioning guides 33 and 34 in the carrier 1. .

  Similar to the long pinion feeding unit 19 described above, the short pinion feeding unit 20 is placed on the feeding table 46 adjusted to the height of the short pinion assembly position of the carrier 1 and the feeding table 46. The short pinion assembly W2 in which the short pinion 3, the needle bearing 13 and the washer 15 are temporarily assembled is inserted into the pinion assembly position of the carrier 1 and attached to the tip of the operating rod 48 of the insertion cylinder 47. And an insertion jig 49 that pushes the short pinion assembly W2.

  The feeding table 46 is attached to the base 23 via an adjustment shim 46A (see FIG. 4), and the height of the table surface for guiding the short pinion assembly W2 is adjusted by replacing the adjustment shim 46A. Can do.

  A schematic configuration of the insertion jig 49 in plan view is shown in FIG. 2 (A), and a schematic configuration in front view is shown in FIG. 2 (B). As shown in FIG. 2, the insertion jig 49 is formed with a substantially V-shaped centering portion 50 that contacts the side surface portion of the short pinion 3 of the short pinion assembly W <b> 2, and the short pinion assembly is formed above and below the centering portion 50. A centering jig 51 having a substantially V-shaped centering portion in a plan view that comes into contact with a side surface portion of the washer 15 disposed above and below W2 is attached. Further, a pinion rotating jig 52 is provided at the center portion of the substantially V-shaped groove of the centering portion 50 so as to face the teeth of the short pinion 3.

  The pinion rotating jig 52 has a flat portion 53 formed on one side in the lateral direction along a plane facing the teeth of the short pinion 3 at the center portion of the substantially V-shaped groove of the centering portion 50 and the short pinion on the other side. A meshing portion 54 that can mesh with the three tooth tips is formed. The meshing portion 54 is formed by a plurality of teeth having a shape along the tooth profile of the short pinion 3 (helical gear in the illustrated example). The flat part 53 and the meshing part 54 are arranged such that the flat part 53 is arranged on one side of the long pinion 2 (already assembled planetary pinion) assembled to the carrier 1 and the meshing part 54 is arranged on the other side. ing. The substantially V-shaped centering portion 50 has a lateral gap formed between the short pinion 3 and the short pinion 3 in a state where the short pinion 3 is in contact with the pinion rotating jig 52, and the short pinion 3 is slightly laterally formed. It is arranged so that it can move.

  When the insertion cylinder 47 is operated and the short pinion assembly W2 is inserted into the assembly position of the carrier 1 by the insertion jig 49, the short pinion 3 and the washer 15 are formed by the substantially V-shaped centering portion 50 and the centering jig 51. Are adjusted to a substantially concentric position, and the short pinion assembly W2 is substantially positioned at the pinion assembly position of the carrier 1 by abutting the short pinion 3 against the pinion positioning guide 34 in the carrier 1.

Next, the operation of the present embodiment configured as described above will be described.
As shown in FIG. 5, the long pinion 2, the needle bearing 13, the spacer 14 and the washer 15 are temporarily assembled to form a long pinion assembly W1, and the short pinion 3, the needle bearing 13 and the washer 15 are temporarily assembled to form a short pinion assembly W2. To do. As shown in FIG. 4, the carrier 1 is set on the holding member 22 of the positioning centering portion 17, and the holding member 22 is fixed at the index position. The pinion shafts 4A and 4B (only the pinion shaft 4A is shown in FIG. 4) are set on the shaft holder 35. Further, the long pinion assembly W1 and the short pinion assembly W2 are placed at predetermined positions on the feeding tables 40 and 46, respectively.

  The insertion cylinder 41 is actuated and the long pinion assembly W1 is pushed by the insertion jig 43 to be inserted into the carrier 1 assembly position. At this time, as shown in FIG. 6A, the long pinion 2 and the washer 15 can be adjusted substantially concentrically by the substantially V-shaped centering portion 44 and the centering jig 45. 6B, the long pinion assembly W1 is fed to the assembly position of the carrier 1, and the long pinion 2 is abutted against the pinion positioning guides 33 and 34, so that the long pinion 2 (needle) Bearing 13 and spacer 14), washer 15 and shaft holes 9, 10 of carrier 1 are positioned substantially concentrically.

  Next, referring to FIG. 7, the air cylinder 31 is operated, and the pusher 30 moves the guide pin 27 from the retracted position shown in FIG. 7A to the protruding position shown in FIG. As a result, the guide pin 27 having the tapered pointed portion 28 becomes the shaft hole 9 of the carrier 1 and the long pinion assembly W1 (note that the needle bearing 13 and the spacer 14 are not shown in FIG. 7B). And it is inserted in the shaft hole 10, and these can be positioned concentrically reliably. Further, the pointed portion 28 of the guide pin 27 is fitted into the centering hole 38 of the pinion shaft 4A held by the shaft holder 35 that is floatingly supported by the floating bearing 37, and the pinion shaft 4A is fitted to the guide pin 27, that is, the carrier 1. It is positioned concentrically with the shaft holes 9, 10 and the long pinion assembly W1. In this way, by floatingly supporting the shaft holder 35, the dimensional tolerance can be absorbed, so that the dimensional accuracy of each part can be relaxed and the manufacturing cost can be reduced.

  In this state, the press-in pusher 39 is operated, and the pinion shaft 4A held by the shaft holder 35 is pushed down together with the guide pin 27 as shown in FIG. 8, and the pinion shaft 4A is press-fitted into the shaft holes 9 and 10 of the carrier 1. Then, the long pinion assembly W1 is assembled to the carrier 1. At this time, the pinion shaft 4A is guided by the guide pin 27 fitted in the centering hole 38, so that the concentricity with the shaft holes 9, 10 of the carrier 1 and the long pinion assembly W1 can be reliably maintained. The press-fitting into the shaft holes 9 and 10 can be performed smoothly.

  In this way, the long pinion assembly W1 can be smoothly assembled to the carrier 1. At this time, it is not necessary to supply and collect the dummy shaft as in the above-described conventional example, and complicated and high-precision equipment for obtaining concentricity of the pinion shaft, the carrier and the dummy shaft is unnecessary, so that the equipment cost is reduced. It can be greatly reduced.

Next, the assembly of the short pinion assembly W2 to the carrier 1 will be described.
Since the short pinion assembly W2 is assembled to the carrier 1 through substantially the same process as the long pinion assembly W1, only the parts different from the case of the long pinion assembly W2 will be described in detail.

  The holding member 22 of the positioning centering portion 17 is rotated, and the carrier 1 to which the long pinion assembly W1 is assembled is indexed and fixed to the assembly position of the short pinion assembly W2.

  The insertion cylinder 47 is actuated and the short pinion assembly W2 is pushed by the insertion jig 49 and inserted into the assembly position of the carrier 1. At this time, as in the case of the long pinion assembly W1, the short pinion 3 and the washer 15 are adjusted substantially concentrically by the substantially V-shaped centering portion 50 and the centering jig 51. The short pinion 3 passes between the long pinion 2 and the leg portion 5A of the carrier 1 while meshing with the teeth of the long pinion 2 (an already-assembled planetary pinion) previously assembled to the carrier 1. The shaft holes 9 and 11 of the short pinion 3 (needle bearing 13) carrier 1 are positioned substantially concentrically by being abutted against the pinion positioning guide 34.

  Here, as shown in FIG. 3, the distance D (see FIG. 3 (A)) between the two legs 5A of the carrier 1 is the width L (FIG. 3) when the long pinion 2 and the short pinion 3 are engaged. (See (B)) is set slightly larger, and the tooth tips of the long pinion 2 and the short pinion 3 are in contact with each other and the meshing is not smoothly performed (see FIG. 3 (C)). These widths L ′ (> L) are larger than the distance D between the leg portions 5A.

  In this state, the short pinion 3 cannot pass between the long pinion 2 previously assembled to the carrier 1 and the leg portion 5 </ b> A of the carrier 1. When the tooth tip of the long pinion 2 and the tooth tip of the short pinion 3 are in contact with each other, the tooth tip of the short pinion 3 is in contact with the leg portion 5A of the carrier 1 and biting occurs between them. It is very difficult to release this.

  On the other hand, in the short pinion feeding unit 20, as shown in FIG. 1A, the tooth tip of the short pinion 3 comes into contact with the tooth tip of the long pinion 2 previously assembled to the carrier 1. As shown in FIG. 1B, the short pinion 3 moves slightly in the lateral direction along the flat portion 53 of the pinion rotating jig 52 between the substantially V-shaped centering portions 50, and the short pinion The contact between the tooth tip of 3 and the tooth tip of the long pinion 2 is released. Then, as shown in FIG. 1C, the short pinion 3 slightly rotates as the tooth tip of the short pinion 3 meshes with the tooth groove of the meshing portion 54 of the pinion rotating jig 52. In this state, when the insertion jig 49 further advances, the tooth tip of the short pinion 3 smoothly meshes with the tooth groove of the long pinion 2. In this way, the interference between the short pinion 3 and the long pinion 2 and the carrier leg 5A can be eliminated, and the short pinion 3 can be smoothly moved to the assembly position in contact with the pinion positioning guide 34. .

  And the short pinion assembly W2 sent to the assembly position of the carrier 1 is assembled to the carrier 1 through the pinion shaft 4B in the same manner as the case of the long pinion assembly W1. In this manner, each of the three long pinion assemblies W1 and the short pinion assembly W2 can be sequentially assembled to the carrier 1.

  In the above embodiment, the planetary pinion assembling apparatus for assembling the long pinion 2 and the short pinion 3 to the carrier 1 of the Ravigneaux type planetary gear mechanism is described as an example. The present invention is not limited to this, and can be similarly applied to an apparatus for assembling a planetary pinion to a carrier of another planetary gear mechanism as long as it can be assembled to a carrier in a state where the planetary pinions are meshed with each other.

In a planetary pinion assembling apparatus according to an embodiment of the present invention, it is an explanatory diagram showing a process of inserting a short planetary pinion into a long planetary pinion while being meshed with a long planetary pinion by a short pinion feeding unit. It is the schematic which shows the pinion insertion jig | tool and pinion rotation jig | tool of the planetary pinion assembly apparatus which concerns on one Embodiment of this invention. It is explanatory drawing which shows the relationship between the width | variety of the horizontal direction by the meshing state of the long pinion and short pinion assembled | attached by the planetary pinion assembly apparatus which concerns on this embodiment, and the space | interval of two leg parts of a carrier. It is explanatory drawing which shows schematic structure of the planetary pinion assembly apparatus which concerns on one Embodiment of this invention. FIG. 5 is an exploded perspective view showing a carrier and a planetary pinion assembly assembled by the planetary pinion assembling apparatus of FIG. 4. It is explanatory drawing which shows the action | operation of the long pinion feeding part of the planetary pinion assembly | attachment apparatus of FIG. It is explanatory drawing which shows the action | operation of the positioning centering part of the planetary pinion assembly apparatus shown in FIG. It is explanatory drawing which shows the action | operation of the press fit part of the planetary pinion assembly | attachment apparatus shown in FIG. It is a top view of the planetary pinion assembly apparatus shown in FIG. It is a longitudinal cross-sectional view of the side surface of the planetary pinion assembling apparatus shown in FIG.

Explanation of symbols

  1 carrier, 2 long planetary pinion (pre-assembled planetary pinion), 3 short planetary pinion (planetary pinion), 4B pinion shaft, 15 washer, 16 planetary pinion assembly device, 17 positioning centering unit (shaft assembly unit), 18 Shaft press-fitting part (shaft assembly part), 20 short pinion feeding part (pinion feeding part), 46 feeding table, 49 insertion jig, 50 centering part, 52 pinion rotating jig, 53 flat part, 54 meshing , W2 short pinion assembly (pinion assembly)

Claims (3)

A planetary pinion assembling apparatus for disposing a pinion assembly having a washer at the end of a planetary pinion on a carrier of a planetary gear mechanism, press-fitting the pinion shaft into the shaft hole of the carrier, and assembling the pinion assembly to the carrier In
An existing assembly in which the planetary pinion is already assembled to the carrier by an insertion jig that abuts on the pinion assembly placed on the feeding table and pushes the planetary pinion and the washer substantially concentrically. A pinion feeding section that positions the pinion assembly on the carrier while meshing with the planetary pinion of
A shaft assembly that inserts the pinion shaft into a pinion assembly disposed in the carrier and press-fits into the shaft hole of the carrier,
The insertion jig is opposed to the planetary pinion teeth at a substantially V-shaped centering portion in a plan view that contacts the planetary pinion and the side portion of the washer, and a substantially V-shaped groove central portion of the centering portion. A pinion rotating jig having a flat portion formed on one side that is the planetary pinion side and a meshing portion that can mesh with a tooth tip of the planetary pinion formed on the other side along a plane to be The planetary pinion assembling apparatus is provided, wherein the centering portion is arranged so that the planetary pinion can move in a lateral direction in contact with the pinion rotating jig. The shaft assembly part is
A holding member that holds the carrier; and a guide pin that has a pointed portion and is movable between a retracted position and a protruding position, and the guide pin is disposed on the carrier when moved to the protruding position. A positioning centering portion that is inserted through the shaft hole of the assembly and the carrier to position them concentrically;
A shaft holder that holds the pinion shaft and floats and supports the pinion shaft so as to face the shaft hole of the carrier. When the guide pin moves to the protruding position, the guide pin is inserted into a centering hole provided at an end of the pinion shaft. The pinion shaft is positioned concentrically with the guide pin by engaging the tip end of the shaft, and a shaft press-fitting portion for press-fitting the pinion shaft into the shaft hole of the carrier is provided. The planetary pinion assembling apparatus described. 3. The planetary pinion set according to claim 2, wherein the positioning centering unit includes an indexing mechanism for sequentially indexing a plurality of assembly positions to which the pinion assembly is assembled by rotating the carrier. Attachment device.

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