JP4432466B2 - Method and apparatus for joining planetary gear carrier of automatic transmission - Google Patents

Description

This invention related to the bonding method and the bonding apparatus of the planetary gear carrier of the automatic transmission, and more particularly, specifically to the bonding method and the bonding apparatus of the planetary gear carrier and the clutch hub.

  The automatic transmission incorporates a plurality of planetary gear mechanisms and multi-plate clutches, and a welding operation is performed when assembling these planetary gear mechanisms and clutches.

As an example, Patent Document 1 proposes what is called projection welding of a sun gear of a planetary gear mechanism and a clutch hub of a multi-plate clutch. Here , projection welding is a method of performing welding by providing projections (protrusions) on a workpiece so that a current flows only in those protrusions and crushing the protrusions.

  This Patent Document 1 describes that by changing from electron beam welding to projection welding, oil passage formation can be simplified and manufacturing costs can be reduced.

JP-A-7-243500.

  By the way, the planetary gear mechanism has a member called a planetary gear carrier that supports the planetary gear via a pinion shaft. When the clutch hub is welded to the side of the planetary gear carrier, the shape of the planetary gear carrier is substantially the same. In general, welding is performed by electron beam welding.

  However, according to electron beam welding, the planetary gear carrier is deformed by welding heat, and it is necessary to finish the pinion shaft hole that supports the pinion shaft after welding.

Therefore, in order to penetrate the finishing tool, it becomes necessary to provide a space (gap) between the planet carrier and the clutch hub, there is a problem that the axial length of the product is increased, also the finishing such as the removal of burrs which is generated when is newly required, there is a problem that must be at the expense of goods and productivity.

  Accordingly, the present invention provides a method and apparatus for joining a clutch hub to the side of a planetary gear carrier of an automatic transmission, and by welding the planetary gear carrier and the clutch hub without using electron beam welding, It is an object of the present invention to provide a method and apparatus for joining planetary gear carriers of an automatic transmission that can improve performance.

A planetary gear carrier joining method of an automatic transmission according to the present invention is a method of joining a clutch hub to a side portion of a planetary gear carrier of an automatic transmission. The clutch hub has a pinion shaft hole vicinity of the planetary gear carrier. circumferential direction of the protruding portion on either side positions are formed, the upper Symbol planet carrier and the upper Symbol clutch hub after positioning and holding on the lower electrode, the planetary gear pinion shaft holes corresponding radial openings in the position of the carrier Insert the conductive intermediate member from the section, press the intermediate member with the upper electrode inserted in the axial direction from the pinion shaft hole, bring the intermediate member into contact with the planetary gear carrier, and energize the upper electrode and lower electrode in projection welding for crushing the projections, a method of junction between planet carrier and the clutch hub.

According to the above configuration, the planetary gear carrier and the clutch hub of the automatic transmission are positioned and held on the lower electrode, and then the conductive intermediate member from the radial opening corresponding to the pinion shaft hole position of the planetary gear carrier. Is inserted, and the intermediate member is pressed by the upper electrode inserted in the axial direction from the pinion shaft hole so as to contact the planetary gear carrier, and then the upper electrode and the lower electrode are energized , whereby the protrusion is It is crushed and projection welded.

In other words, the planetary gear carrier and the clutch hub insert the conductive intermediate member using the radial opening corresponding to the pinion shaft hole position even if the planetary gear carrier has a substantially U-shaped cross section. and, by pressing the intermediate member in the upper electrode inserted utilizing the pinion shaft holes, Ru can projection welding.

Further , it is a method of welding by projection welding that crushes the protrusion formed on the clutch hub.

According to this configuration, since projection welding projections are generally formed on a clutch hub formed by press working and welding is performed, it is only necessary to form projections on the press die, thereby reducing the manufacturing cost. Can be reduced. Moreover, since the welding method is projection welding, problems such as wear do not occur in the welding tool, so maintenance work can be facilitated.

Moreover, the upper Symbol projections, formed in the circumferential direction of the positions on both sides of the pinion shaft holes near state, and are a method of welding the planet carrier and the clutch hub, projection welding at positions on both sides in the circumferential direction of the pinion shaft holes near Therefore, the position that contributes most to driving force transmission can be reliably welded, and the reliability of the product can be improved.

Bonding apparatus of the planetary gear carrier of the automatic transmission according to the present invention, in the bonding apparatus of the planetary gear carrier of the automatic transmission of joining the clutch hub to the side of the planetary gear carrier of the automatic transmission, the upper Symbol planet carrier the upper Symbol clutch hub and the lower electrode positioning and holding the energization of the intermediate member to be inserted from the radial direction of the opening corresponding to the pinion shaft hole positions of the planet gear carrier, or inserting the intermediate member in the radial direction and a moving means for retracting, is inserted from the pinion shaft hole axially Rutotomoni and an upper electrode is brought into contact with the planetary gear carrier by pressing the intermediate member, between the moving means and the intermediate member, the Floating means for supporting the intermediate member so as to be movable up and down with respect to the opening of the planetary gear carrier is provided.

  According to the above configuration, the planetary gear carrier and the clutch hub are positioned and held by the lower electrode, and the conductive intermediate member is inserted by the moving means from the radial opening corresponding to the pinion shaft hole position of the planetary gear carrier. The upper electrode is inserted in the axial direction from the pinion shaft hole and the intermediate member is pressed to bring the intermediate member into contact with the planetary gear carrier, and projection welding is performed in this state.

Ie, by inserting the electrical conductivity of the intermediate member from the radial direction of the opening corresponding to the pinion shaft hole positions of the planet gear carrier, it is possible to perform the energization between the upper and lower electrodes, substantially U A planetary gear carrier having a U-shaped cross section and a clutch hub can be welded.

Moreover, between the upper Symbol moving means intermediate member state, and are not provided with floating means for vertically movably supporting the intermediate member relative to the opening of the planet carrier, the intermediate member by the floating means Is supported so as to be movable up and down, so that when a large number of products are manufactured, even if a manufacturing error occurs in each product, the floating means absorbs the error. Thereby, an intermediate member can be reliably inserted in the planetary gear carrier of a substantially U-shaped cross section. Therefore, even if a manufacturing error occurs in the product, the projection welding work can be performed without generating a yield, and the workability in the case of conducting a large number of products by current welding can be improved.

In one embodiment of the invention and, in the upper Symbol floating means is a rubber member having electrical insulation.

According to the above configuration, by making the floating means a rubber member having electrical insulation, it is possible to perform insulation while also adding electricity to the floating means flowing through the intermediate member.
Therefore, when conducting current welding between the upper electrode and the lower electrode, all the current can be used for projection welding without electricity leaking to the outside via the intermediate member.

According to this invention, even if the planetary gear carrier and the clutch hub have a substantially U-shaped cross section, the conductive gear carrier and the clutch hub are made conductive by utilizing the radial opening corresponding to the pinion shaft hole position. Projection welding can be performed by inserting the intermediate member and pressing the intermediate member with the upper electrode inserted in the axial direction using the pinion shaft hole. For this reason, the planetary gear carrier and the clutch hub can be welded without using electric beam welding.

Therefore, there is no need to finish machining the pinion shaft hole that supports the pinion shaft after welding, so there is no need to provide a space (gap) between the planetary gear carrier and the clutch hub in order to allow the finishing tool to pass through. Moreover, it is not necessary to remove burrs generated during finishing.
That is, according to the present invention, since the thermal deformation hardly during welding, without affecting the quality even if the finishing of the pinion shaft holes prior to welding, and without undergoing the finishing also constraints There is an effect that can be easily performed .

Furthermore, since it is the method of welding by the projection welding which crushes the projection part formed in the clutch hub, there exists the following effect.

In other words, projection welding projections are generally formed on a clutch hub formed by pressing, and welding is performed. Therefore, it is only necessary to form projections on the press die, so that the manufacturing cost can be reduced. Since the welding method is projection welding, there is no problem such as wear in the welding tool, so that there is an effect that the maintenance work can be facilitated.

In addition, the protrusions are formed on both sides in the circumferential direction near the pinion shaft hole, and the planetary gear carrier and the clutch hub are welded. By projection welding at both sides in the circumferential direction near the pinion shaft hole. Since it can join, the position which contributes most to driving force transmission can be welded reliably, and there exists an effect which can improve the reliability of goods.
Therefore, according to this invention, the joining method and joining apparatus of the planetary gear carrier of an automatic transmission which can improve merchantability and productivity can be provided.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall view of the joining device 1 of this embodiment, FIG. 2 is a plan view of the joining device 1 with the upper electrode 2 removed, and FIG. 3 is an automatic transmission U assembled using the joining device 1. 4 to 7 are views showing the countershaft assembly CS joined by the joining device 1.

First, the workpiece | work W side joined with the joining apparatus 1 of a present Example is explained in full detail.
The workpieces of this embodiment are W , a planetary gear carrier 30 (see FIG. 4) and a clutch hub 31 (see FIG. 4) of a planetary gear mechanism built in the automatic transmission U (see FIG. 3) .

Automatic transmission U which incorporates the workpiece W, as shown in FIG. 3, the torque converter case 10, the gear case 11, and constitute the casing of the automatic transmission U by the differential case 12, a torque converter 13 therein, The main shaft gear unit 14, the counter shaft gear unit 15, and the differential device 16 are built in.

Then, the automatic transmission U is decelerated rotational driving force from an engine (not shown), or are transmitted to increased speed to the wheels (not shown). The arrows in FIG. 3 indicate the transmission path of this rotational driving force.

  First, the rotational driving force output from the engine is transmitted to the torque converter 13 of the automatic transmission U. The rotational driving force is transmitted to the main shaft gear unit 14 after the torque is amplified by the torque converter 13.

Then, the main shaft gear unit 14, deceleration by a plurality of multi-disc clutch and a planetary gear mechanism (not shown), or the speed increase is made, to transmit the rotational driving force to the counter shaft gear unit 15.

Then, even the counter shaft gear unit 15, a plurality of multi-plate clutch and the planetary gear mechanism, decelerate the rotation driving force transmitted from the main shaft gear unit 14, or by accelerated, the deceleration, or it is accelerated The rotational drive force transmitted to the differential device 16 is transmitted.

Finally, the reduction in differential device 16, or are configured to transfer allocated to left and right wheels of the rotational driving force accelerated.
Among these, the workpiece W to be joined by the present joining apparatus 1 is assembled to the countershaft gear unit 15.

The counter shaft gear unit 15, as shown in FIG. 3, extending building countershaft 17 in the vehicle width direction, bearing support input gear 18 with the countershaft 17 on the axis, arranged on the left side side of the input gear 18 The planetary gear mechanism 19 further includes first and second multi-plate clutches 20 and 21 disposed on the left side thereof, and an output gear 22 that transmits the output of the counter shaft 17 to the differential device 16 on the right side of the input gear 18. .

A roller bearing 23 (right side in the figure ) and a needle bearing 24 (left side in the figure ) are provided at both ends of the countershaft 17, and the countershaft 17 is supported by the gear case 11 at both ends.
In addition, 25 is a speedometer gear and 26 is a lock nut.

The workpiece W to be welded by the joining device 1 of the present embodiment is the planetary gear carrier 30 of the planetary gear mechanism 19 and the clutch hub 31 of the first multi-plate clutch 20 arranged on the countershaft 17 axis (see FIG. 4) .

4 to 6 are views showing a state (counter shaft assembly CS) in which the planetary gear carrier 30 and the clutch hub 31 are joined to the counter shaft 17 and assembled. Figure 4 is a whole sectional view, FIG. 5 is a side state as viewed from the left side (the clutch hub 31 side), and FIG. 6 is a side state as viewed from the right side (the planetary gear carrier 30 side), and FIG. 7 in FIG. 4 It is AA arrow sectional drawing.

As shown in FIG. 4, in the center of the counter shaft 17, forming an extending buildings flange portion 17a in the radial direction, it is joined to the inner peripheral portion of the first carrier member 30A donut disk shape to the flange portion 17a . The open end of the drum-shaped second carrier member 30B disposed on the left side is joined to the outer edge of the first carrier member 30A.
The bonding of the two junctions 箇 plants, energized welding are conducted by electron beam welding or the like.

The first carrier member 30A and the second carrier member 30B are respectively provided with pinion shaft holes 33A and 33B through which pinion shafts (not shown ) for supporting the planetary gear 32 (see FIG. 7 ) are inserted at intervals of 120 degrees . And pinion shaft holes 33A and 33B facing each other support the pinion shaft.

  Further, the drum-shaped second carrier member 30B is formed with an opening 34 that is opened in the radial direction by cutting out a portion where the planetary gear 32 is located, that is, an outer peripheral portion corresponding to the position of the pinion shaft holes 33A and 33B. is doing.

As described above, the donut-shaped first carrier member 30A and the drum-shaped second carrier member 30B are joined to the center of the countershaft 17, and the planetary gear having a substantially U-shaped cross section with the space S inside. The planetary gear carrier 30 of the mechanism is configured. And the opening part 34 for the planetary gear 32 is formed in the outer peripheral part of the planetary gear carrier 30 at intervals of 120 degrees.
Further, a drum-shaped clutch hub 31 having an open left side is joined to the left side of the planetary gear carrier 30.

The clutch hub 31 is provided with a spline 31 a that meshes with the clutch plate of the first multi-plate clutch 20 on the outer peripheral portion. The spline 31a is formed on the entire outer periphery of the clutch hub 31 by press working.
The clutch hub 31 and the planetary gear carrier 30 are joined by so-called projection welding described later.

The countershaft 17 is internally provided with an oil passage 17b for supplying lubricating oil to the planetary gear mechanism 19 and the multi-plate clutches 20 and 21 installed on the countershaft 17 axis. member 30A, the second carrier 30B and the clutch hub 31, the communication hole 35, 36 and 37 have a plurality of drilled axially respectively, are configured to perform the circulation of lubricating oil.
The communication holes 36 and 37 also function as positioning holes for the joining device 1 during projection welding described later.

FIGS. 8 and 9 show single product diagrams of the second carrier member 30B and the clutch hub 31, respectively.
As described above, the second carrier member 30B is configured as a drum shape having openings 34 opened in the radial direction for the planetary gear 32 (see FIG. 7) at intervals of 120 degrees. As described above, the joint step 38 to be joined to the first carrier member 30A is formed at the open end of the second carrier member 30B.

However, the bottom portion 39 of the drum-shaped to be joined with the clutch hub 31 (the left side in the drawing) is a flat surface, the processing for joining the clutch hub 31 is not subjected any way.

  On the other hand, the clutch hub 31 is formed with six projections 41 for projection welding on the drum-shaped bottom surface 40 that is a joint surface, and two at both circumferential positions near the pinion shaft hole 33B. ing.

  Specifically, as shown in FIG. 10 which is a cross-sectional view taken along the line BB, it is formed by pressing so as to protrude toward the second carrier member 30B, and is a circle having a diameter of about 4 mm and about 2 The protrusion 41 having a protruding amount of millimeter is formed.

Next, the joining apparatus 1 that joins the second carrier member 30B and the clutch hub 31 will be described.
As shown in FIG. 1, the joining apparatus 1 can be moved by a lower electrode 4 installed on a flat substrate 3, an upper electrode 2 integrated with an upper pressure cylinder 5, and an air cylinder 6. Core electrode 7 formed.

  The lower electrode 4 described above has a cylindrical portion 4a having a hollow in the center to avoid the countershaft 17 that is the workpiece W, and is configured to hold the workpiece W at the upper end surface thereof. And the positioning pin 4b which positions the workpiece | work W is standingly arranged in the upper end surface, and the position of the workpiece | work W is prescribed | regulated and hold | maintained reliably.

The aforementioned upper electrode 2 also has a cylindrical portion 2a having a hollow in the center to avoid the counter shaft 17, and three cylindrical portions 2b having a diameter smaller than that of the pinion shaft hole 33A are formed at intervals of 120 degrees at the lower end portion thereof. (Only one is shown in FIG. 1). The upper electrode 2 can be moved up and down by an upper pressure cylinder 5.

  The core electrode 7 is formed of a copper plate having a thickness that can be inserted into the planetary gear carrier 30 of the workpiece W (thickness approximately equal to the interval of the planetary gear carrier 30), and its rear end is connected via a bolt 8. It is fixed to a rubber member 9 that supports floating. The core electrode 7 can also be advanced and retracted in the horizontal direction by the rear air cylinder 6.

  As shown in FIG. 2, three core electrodes 7 are provided at intervals of 120 degrees corresponding to the positions of the pinion shaft holes 33A, and each core electrode 7 is set to a width that can be inserted from the opening 34 of the planetary gear carrier 30. ing. The width is set so as to include the protrusion 41 described above.

  The tip of the core electrode 7 is chamfered 7a so that it can be easily inserted from the opening 34 of the planetary gear carrier 30.

  Next, the welding method of the joining apparatus 1 comprised in this way is demonstrated using the flowchart of FIG.

  First, the clutch hub 31 is set on the lower electrode 4 in step S1. At this time, positioning is performed by inserting the communication hole 37 of the clutch hub 31 into the positioning pin 4b.

  Next, the planetary gear carrier 30 integrated with the countershaft 17 is set on the lower electrode 4 in step S2. At this time, positioning is performed by inserting the communication hole 36 of the planetary gear carrier 30 into the positioning pin 4b.

Next, in step S <b> 3, the air cylinder 6 is driven, and the core electrode 7 is inserted into the planetary gear carrier 30. At this time, since the rubber member 9 between the air cylinder 6 and the core electrode 7 performs a floating function, even if the opening 34 of the planetary gear carrier 30 is displaced in the vertical direction due to a manufacturing error, the core electrode 7 Is easily inserted into the planetary gear carrier 30.

Next, in step S4, the pressure cylinder 5 is driven to lower the upper electrode 2 until it comes into contact with the core electrode 7, and pressurizes by applying a joining load. At this time, pressure is applied by inserting the cylindrical portion 2b of the upper electrode 2 through the pinion shaft hole 33A.

Next, a junction current is applied in step S5. That is, the workpiece W is joined in step S5 . By this energization, the protrusion 41 of the clutch hub 31 is crushed and joined to the planetary gear carrier 30. That is, the clutch hub 31 and the planetary gear carrier 30 are joined by projection welding.

Next, by driving the pressure cylinder 5 at step S6, to raise the upper electrodes 2, to retract the upper electrode 2 from the work W.

Next, in step S <b> 7, the air cylinder 6 is driven to retract the core electrode 7 and retract the core electrode 7 from the work W.

  Next, in step S8, the workpiece W is taken out from the lower electrode 4, and the joining operation by the joining apparatus 1 is completed.

Thus, in the welding method of the present embodiment, the planetary gear carrier 30 and the clutch hub 31 can be joined by projection welding even though the planetary gear carrier 30 has a substantially U-shaped cross section.

Next, it will be described in detail acts and effects of this embodiment constructed as described above.

Thus, the planetary gear carrier joining method of the automatic transmission according to the present embodiment is the method of joining the clutch hub 31 to the side portion of the planetary gear carrier 30 of the automatic transmission U. The planetary gear carrier 30 and the clutch After the hub 31 is positioned and held on the lower electrode 4, the conductive core electrode 7 is inserted from the radial opening 34 corresponding to the position of the pinion shaft holes 33A and 33B of the planetary gear carrier 30, and the pinion The upper electrode 2 is inserted in the axial direction from the shaft hole 33A to press the core electrode 7, the core electrode 7 is brought into contact with the planetary gear carrier 30, and the upper electrode 2 and the lower electrode 4 are energized, and the planets In this method, the joint between the gear carrier 30 and the clutch hub 31 is joined by projection welding .

According to the above configuration, the planetary gear carrier 30 and the clutch hub 31 of the automatic transmission U are positioned and held on the lower electrode 4 and then the radial opening corresponding to the position of the pinion shaft hole 33A of the planetary gear carrier 30. The conductive core electrode 7 is inserted from 34, and is pressed against the planetary gear carrier 30 by pressing the core electrode 7 with the upper electrode 2 inserted in the axial direction from the pinion shaft hole 33A. Welding is performed by energizing the electrode 2 and the lower electrode 4.

That is, the planetary gear carrier 30 and the clutch hub 31 utilize the radial opening 34 corresponding to the position of the pinion shaft holes 33A and 33B even if the planetary gear carrier 30 has a substantially U-shaped cross section. Then, by inserting the conductive core electrode 7 and pressing the core electrode 7 with the upper electrode 2 inserted using the pinion shaft hole 33A, projection welding can be performed.

Therefore, it is not necessary to finish the pinion shaft hole 33B that supports the pinion shaft (not shown) after welding, so that a space (between the planetary gear carrier 30 and the clutch hub 31 is provided to allow the finishing tool to pass therethrough. It is not necessary to provide a gap), and it is not necessary to remove burrs generated during finishing.
That is, according to the present invention, since the thermal deformation hardly during welding, even if the finishing of the pinion shaft holes 33B before welding without affecting the quality, also be subjected to the finishing also constraints And can be done easily.

  Therefore, according to this welding method, merchantability and productivity can be improved.

In the present embodiment, the planet carrier 30 and the clutch hub 31 on the counter shaft 17 and the workpiece W, but it may also the planet carrier and the clutch hub on the main shaft as a work.

  In this embodiment, the joint is welded by projection welding that crushes the protrusion 41 formed on the clutch hub 31.

  According to the above configuration, since the projection 41 for projection welding is formed on the clutch hub 31 formed by press working and welding is performed, it is only necessary to form the projection on the press die. Can be reduced. In addition, since the welding method is projection welding, problems such as wear do not occur in the welding tool, and maintenance work can be facilitated.

  In this embodiment, the projection 41 is set at both circumferential positions near the pinion shaft hole 33B, and the planetary gear carrier 30 and the clutch hub 31 are welded.

  According to the said structure, since it can weld at the both sides position of the circumferential direction of the pinion shaft hole 33B vicinity, the position which contributes most to driving force transmission can be welded reliably, and the reliability of goods can be improved.

The bonding apparatus 1 of the planetary gear carrier of the automatic transmission of the embodiment, there is provided an apparatus for joining a clutch hub 31 on the side of the planetary gear carrier 30 of the automatic transmission U, the said planetary gear carrier 30 the clutch hub 31 And the lower electrode 4 for positioning and holding, the conductive core electrode 7 inserted from the radial opening 34 corresponding to the position of the pinion shaft holes 33A and 33B of the planetary gear carrier 30, and the diameter of the core electrode 7 an air cylinder 6 to be inserted or retracted in the direction, is inserted from the pinion shaft holes 33A in the axial direction, in which an upper electrode 2 is brought into contact with the planetary gear carrier 30 to press the core electrode 7.

According to the above configuration, the planetary gear carrier 30 is substantially U-shaped by inserting the conductive core electrode 7 from the radial opening 34 corresponding to the position of the pinion shaft holes 33A and 33B of the planetary gear carrier 30. Even with a cross section, electricity can be applied between the upper electrode 2 and the lower electrode 4, and the planetary gear carrier 30 and the clutch hub 31 can be welded.

Further, in this embodiment, between the air cylinder 6 and the core electrode 7, but having a rubber member 9 for supporting the tang electrode 7 freely up and down movement.

According to the above configuration, since supporting the core electrodes 7 freely vertically moving a rubber member 9, even if there is manufacturing error in each product in the production of many products, the error rubber member 9 is In order to absorb, the core electrode 7 can be reliably inserted into the planetary gear carrier 30. Therefore, even if a manufacturing error occurs in the product, it is possible to perform the energization welding work without generating a yield, and it is possible to improve the workability when many products are projection welded.

  In addition, instead of the rubber member 9, a manufacturing error may be absorbed by an elastic deformable body such as a spring member.

  In this embodiment, the rubber member 9 has electrical insulation.

  According to the said structure, the rubber means 9 which absorbs a manufacturing error can add and perform the insulation of the electricity which flows into the core electrode 7. FIG.

Therefore, when current welding is performed between the upper electrode 2 and the lower electrode 4, all current can be used for projection welding without electricity leaking to the outside via the core electrode 7.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
The intermediate member of the present invention corresponds to the core electrode 7 of the embodiment,
Similarly,
The protrusion corresponds to the protrusion 41,
The moving means corresponds to the air cylinder 6,
The present invention is not limited to the configuration of the above-described embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The top view except the upper electrode of the joining apparatus. 1 is a schematic sectional view of an automatic transmission. Sectional drawing of a countershaft assembly. The left view of a countershaft assembly. The right view of a countershaft assembly. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. Sectional drawing (a) and a top view (b) of a 2nd carrier member. The top view (a) and sectional drawing (b) of a clutch hub. FIG. 10 is a sectional view taken along line B-B in FIG. 9. The flowchart shown about a welding method.

DESCRIPTION OF SYMBOLS 1 ... Joining apparatus 2 ... Upper electrode 4 ... Lower electrode
6 ... Air cylinder (moving means)
7. Core electrode (intermediate member)
9 ... Rubber member (floating means)
30 ... Planetary gear carrier 31 ... Clutch hub
33A, 33B ... Pinion shaft hole
34 ... opening 41 ... projection (protrusion)

Claims (3)

In the method of joining the clutch hub to the side of the planetary gear carrier of the automatic transmission,
The clutch hub is formed with protrusions at both circumferential positions near the pinion shaft hole in the planetary gear carrier,
The upper Symbol planet carrier and the upper Symbol clutch hub after positioning and holding on the lower electrode,
Inserting a conductive intermediate member from a radial opening corresponding to the pinion shaft hole position of the planetary gear carrier;
The upper electrode is inserted in the axial direction from the pinion shaft hole to press the intermediate member, and the intermediate member is brought into contact with the planetary gear carrier,
By energizing the upper and lower electrodes, in projection welding for crushing the protrusions, the bonding method of the planetary gear carrier of the automatic transmission that junction the planet carrier and the clutch hub. A planetary gear carrier joining device for an automatic transmission that joins a clutch hub to a side of a planetary gear carrier for an automatic transmission,
A lower electrode for positioning and holding the planetary gear carrier and the clutch hub;
An electrically conductive intermediate member inserted from a radial opening corresponding to the pinion shaft hole position of the planetary gear carrier;
Moving means for inserting or retracting the intermediate member in the radial direction;
An upper electrode inserted in the axial direction from the pinion shaft hole and pressing the intermediate member to contact the planetary gear carrier;
Floating means is provided between the moving means and the intermediate member to support the intermediate member so as to be movable up and down with respect to the opening of the planetary gear carrier.
Joining device for planetary gear carrier of automatic transmission. Bonding equipment planet carrier of an automatic transmission of a rubber member <br/> claim 2 wherein said floating means comprises an electrical insulation.

Images