JP6549389B2 - Washer assembly device for pinion gear - Google Patents

Description

  The present invention relates to a washer assembling device for a pinion gear used for assembling a pinion gear and a washer.

  Conventionally, there is JP-A-7-314265 as a technique related to such a field. The pinion gear assembling apparatus described in this publication is an apparatus for incorporating a pinion gear assembly comprising a pinion gear, a dummy shaft and a washer into a planetary carrier. When assembling the pinion gear assembly, with the guide pin erected in the vertical direction inserted into the center hole of the washer and the shaft hole of the pinion gear, the dummy shaft is lowered from the upper side, and this dummy shaft Insert into the center hole and the shaft hole of the pinion gear. Thereby, the pinion gear assembly is assembled, and this pinion gear assembly is incorporated into the planetary carrier.

JP-A-7-314265

  However, when the pinion gear assembly is taken out after assembly, if the dummy shaft is displaced in the axial direction for some reason, the washer may be easily detached from the end of the dummy shaft.

  An object of the present invention is to provide a washer assembling device for a pinion gear in which a washer is less likely to come off from an end of a dummy shaft assembled to the pinion gear assembly when the pinion gear assembly is taken out of the apparatus. I assume.

The present invention is a washer assembling apparatus including a washer assembling jig for assembling a pinion gear and a washer, wherein
The washer assembly jig is
A washer guide shaft which advances and retracts in the axial direction of the dummy shaft loaded in the axial hole of the pinion gear and extends in the axial direction and is inserted into the central hole of the washer to hold the washer;
Dummy shaft positioning concentrically arranged with respect to the washer guide shaft, advancing and retreating in the axial direction in the washer guide shaft, and inserting a tip into a central hole of the axially extending dummy shaft idea,
And a washer pusher for moving the washer held by the washer guide shaft toward the tip of the washer guide shaft.
In the state where the end of the dummy shaft is inserted into the central hole of the washer, the washer is pressed against the pinion gear at the washer pushing portion, and the tip of the washer guide shaft is at the end face of the dummy shaft Abutted, the tip end of the dummy shaft positioning pin is inserted into the center hole of the dummy shaft;
Under these circumstances, after retracting the dummy shaft positioning pin, a pinion gear assembly composed of the pinion gear, the washer and the dummy shaft is taken out in a direction perpendicular to the axis.

  In this washer assembly device for a pinion gear, with the dummy shaft loaded in the pinion gear, the tip end of the washer guide shaft is brought into contact with the end face of the dummy shaft. Thereafter, the tip end of the dummy shaft positioning pin is inserted into the center hole of the dummy shaft to align the washer guide shaft with the dummy shaft. In this state, the washer previously attached to the washer guide shaft is pushed out by the washer pushing portion to press the washer against the pinion gear, and at the same time, the end of the dummy shaft is inserted into the center hole of the washer. Under such circumstances, after retracting the dummy shaft positioning pin, a pinion gear assembly composed of a pinion gear, a washer and a dummy shaft is taken out in a direction orthogonal to the axis of the dummy shaft. By such a series of operations, when taking out the pinion gear assembly out of the apparatus, the washer is less likely to come off from the end of the dummy shaft.

  According to the present invention, when the pinion gear assembly is taken out of the apparatus, it is possible to make it difficult for the washer to come off from the end portion of the dummy shaft assembled to the pinion gear assembly.

FIG. 1 is a cross-sectional view showing an embodiment of a washer assembling device for a pinion gear according to the present invention. It is sectional drawing which shows the state which set the pinion gear to the washer assembly | attachment apparatus. It is sectional drawing which shows the state which inserted | pinched the dummy shaft by the washer assembly jig on either side. It is sectional drawing which shows the state which inserted the front-end | tip of a dummy shaft positioning pin in the central hole of a dummy shaft. It is sectional drawing which shows the state which advanced the washer extrusion part. Washer 4 is a cross-sectional view showing a state in which the washer is pushed by the washer pushing portion and abuts against the end face of the pinion gear. It is sectional drawing which shows the state which retracted the dummy shaft positioning pin.

  BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a washer assembling apparatus for a pinion gear according to the present invention will be described in detail below with reference to the drawings.

  As shown in FIG. 1, the washer assembling apparatus 1 for a pinion gear has a holder portion (not shown) for holding the pinion gear 2, and the holder portion (not shown) is sandwiched to provide a pair of left and right The washer assembling jigs A and B are disposed to face each other. Further, the washer assembling device 1 is used for assembling a pinion gear assembly G including the pinion gear 2, the washer 4 and the dummy shaft 6. The operations of the left and right washer assembling jigs A and B are synchronized and have the same configuration. Therefore, only the washer assembling jig A will be described in detail below.

  The washer assembly jig A advances and retracts in the direction of the axis L of the dummy shaft 6 loaded in the shaft hole 2 a of the pinion gear 2 and extends in the direction of the axis L and in the central hole 4 a of the disc-like washer 4. A dummy inserted in the washer to hold the washer 4 and disposed concentrically with the washer guide shaft 10 and advancing and retracting in the direction of the axis L in the washer guide shaft 10 and extending in the direction of the axis L A dummy shaft positioning pin 20 whose tip is inserted into the center hole 6a of the shaft 6; and a washer extruding portion 30 for moving the washer 4 held by the washer guiding shaft 10 toward the tip of the washer guiding shaft 10; Is equipped.

  The cylindrical washer guide shaft 10 has a first guide portion 11 for guiding the movement of the washer 4 in the direction of the axis L, and the outer diameter of the first guide portion 11 is the center hole 4 a of the washer 4. The diameter is substantially the same, and the first guide portion 11 extends in the direction of the axis L with the same diameter. The washer guide shaft 10 is provided with a second guide portion 12 extending rearward continuously with the rear end of the first guide portion 11, and the second guide portion 12 is provided on the first guide portion 11. It has a large diameter. A washer contact surface 13 extending in the radial direction is disposed at a boundary between the first guide portion 11 and the second guide portion 12.

  The diameter of the second guide portion 12 is smaller than the outer diameter of the washer 4, and the washer 4 is in a radial direction with respect to the second guide portion 12 in a state where the washer 4 is in contact with the washer contact surface 13. It protrudes outside. Further, the washer guide shaft 10 is arranged such that the axis L1 and the axis L of the dummy shaft 6 coincide with each other. The second guide portion 12 is inserted into the through hole 30 a of the washer extruding portion 30, and the washer extruding portion 30 slides along the outer surface of the second guide portion 12 in the direction of the axis L.

  A linearly extending dummy shaft positioning pin 20 is inserted into a through hole 10 a formed along the axis L 2 of the washer guide shaft 10 and is concentric with the washer guide shaft 10. The diameter of the dummy shaft positioning pin 20 is substantially the same as the diameter of the central hole 6a of the dummy shaft 6, and the axis L2 of the dummy shaft positioning pin 20 and the axis L of the dummy shaft 6 are concentric.

  The washer guide shaft 10 is biased rearward (in the direction away from the dummy shaft 6) by the spring force of a compression coil spring (not shown), and a hydraulic cylinder is used as the first drive source 40 for the washer guide shaft 10 ing. Therefore, when the washer guide shaft 10 is pushed forward by the projection of the piston rod of the hydraulic cylinder 40, the washer guide shaft 10 advances to the end face 6 c of the dummy shaft 6 against the spring force of the compression coil spring. On the other hand, when the piston rod of the hydraulic cylinder 40 is retracted, the washer guide shaft 10 is retracted by the spring force of the compression coil spring.

  The dummy shaft positioning pin 20 is biased rearward by the spring force of a compression coil spring (not shown), and the dummy shaft positioning pin 20 utilizes a hydraulic cylinder as a second drive source 50. Therefore, when the dummy shaft positioning pin 20 is pushed forward by the projection of the piston rod of the hydraulic cylinder 50, the dummy shaft positioning pin 20 is advanced against the spring force of the compression coil spring and the tip of the dummy shaft positioning pin 20 Is inserted into the center hole 6 a of the dummy shaft 6. On the other hand, when the piston rod of the hydraulic cylinder 50 is retracted, the dummy shaft positioning pin 20 is retracted by the spring force of the compression coil spring and comes out of the central hole 6 a of the dummy shaft 6.

  The washer pushing portion 30 which can move back and forth along the second guide portion 12 of the washer guiding shaft 10 uses a hydraulic cylinder as a third drive source 60. When the washer push-out portion 30 is pushed forward by the projection of the piston rod of the hydraulic cylinder 60, the tip of the washer push-out portion 30 advances the washer 4 toward the dummy shaft 6. The washer 4 is brought into contact with the end face 2b of the pinion gear 2, and the washer pushing portion 30 maintains this state. On the other hand, when the piston rod of the hydraulic cylinder 60 is retracted, the washer pushing portion 30 can be retracted.

  Furthermore, the first drive source 40 can simultaneously move the second drive source 50 itself and the third drive source 60 itself in the direction of the axis L. Therefore, by driving the first drive source 40, the washer guide shaft 10, the dummy shaft positioning pin 20, and the washer pushing portion 30 can be simultaneously advanced and retracted. Furthermore, by driving the second drive source 50, only the dummy shaft positioning pin 20 can be advanced and retracted. Further, by driving the third drive source 60, only the washer pushing portion 30 can be advanced and retracted.

  The above is the description of the washer assembling jig A. Since the washer assembling jig B has the same configuration as the washer assembling jig A, the same reference numeral is attached to the structure. The description is omitted.

  Next, the operation of the washer assembling device 1 will be described.

  As shown in FIG. 2, the pinion gear 2 loaded with the dummy shaft 6 is held by the holder portion (not shown) at a predetermined position between the washer assembling jig A and the washer assembling jig B. Further, the washer 4 is attached to the first guide portion 11 of the washer guide shaft 10. As shown in FIG. 3, the hydraulic cylinder (first drive source) 40 is driven to simultaneously advance the washer guide shaft 10, the dummy shaft positioning pin 20 and the washer pushing portion 30, and the tip of the washer guide shaft 10 10b is brought into contact with the end face 6c of the dummy shaft 6. At this time, the dummy shaft 6 is sandwiched between the washer guiding shaft 10 of one washer assembling jig A and the washer guiding shaft 10 of the other washer assembling jig B.

  As shown in FIG. 4, only the hydraulic cylinder (second drive source) 50 is driven to insert the tip of the dummy shaft positioning pin 20 into the center hole 6 a of the dummy shaft 6. By this, center alignment of the washer guide shaft 10 and the dummy shaft 6 is performed. As shown in FIG. 5 and FIG. 6, in this state, the washer 4 is pushed out by the washer extruding portion 30 to bring the washer 4 into contact with the end face 2b of the pinion gear 2, and at the same time The end 6 b of the dummy shaft 6 is inserted. At this time, the washer 4 is sandwiched from the left and right by the end face 2 b of the pinion gear 2 and the tip of the washer pushing portion 30.

  As shown in FIG. 7, under this circumstance, by driving only the second drive source 50, only the dummy shaft positioning pin 20 is retracted. At this time, the tip of the dummy shaft positioning pin 20 comes out of the center hole 6 a of the dummy shaft 6. As a result, the pinion gear assembly G consisting of the pinion gear 2, the washer 4 and the dummy shaft 6 is maintained in a state of being sandwiched by one washer assembling jig A and the other washer assembling jig B. Then, the pinion gear assembly G is taken out in a direction (direction of arrow D) orthogonal to the axis L. Since the washer 4 is maintained in a state of being sandwiched between one washer assembling jig A and the other washer assembling jig B until just before taking it out, when the pinion gear assembly G is taken out of the apparatus 1 The washer 4 does not easily come off from the end 6 b of the dummy shaft 6.

  When taking out the pinion gear assembly G in a state of being sandwiched by one washer assembling jig A and the other washer assembling jig B, the pinion gear assembly G is pushed out by a pusher (not shown). Then, the pushed pinion gear assembly G rolls within the transport rail 70 and is transported to a predetermined place. The transport rail 70 is formed in a U-shape in cross section, and the width between the side plates 70a erected on the bottom portion 70b of the transport rail 70 is substantially the same as the width of the pinion gear assembly G. Therefore, the washer 4 does not fall off when the pinion gear assembly G rolls along the transport rail 70.

  Then, the pinion gear assembly G taken out of the device 1 and sent to a predetermined place by the transport rail 70 is incorporated into a planetary carrier (not shown). The dummy shaft 6 is removed from the pinion gear assembly G at the time of assembly of a planetary carrier (not shown).

  The washer guide shaft 10 and the dummy shaft positioning pin 20 of the washer assembling jig A of the left and right and the washer guiding shaft 10 and the dummy shaft positioning pin 20 of the other washer assembling jig B of the left and right At the same time, the dummy shaft 6 is displaced to the left or right due to the difference between the left and right spring forces or the timing of the retraction of the washer assembling jigs A and B. As a result, when taking out the pinion gear assembly G, any one of the washers 4 is dropped from the dummy shaft 6.

  When the washer 4 falls off as described above, conveyance failure of the pinion gear assembly G occurs due to the dropped washer 4 and causes assembly failure when the pinion gear assembly G is assembled to the planetary carrier. Further, since the washer 4 is small as a component, it is extremely difficult to rework the returned washer 4 back to the original pinion gear assembly G. In addition, adjustments such as the difference in spring force between the left and right of washer assembly jigs A and B, and the deviation of the timing of retreat of washer assembly jigs A and B, etc., require time and intuition, etc. It is forced to work. Therefore, the present invention has been proposed to avoid such a situation.

  DESCRIPTION OF SYMBOLS 1 ... washer assembling device 2 ... pinion gear 2a ... shaft hole of pinion gear 2b ... end face of pinion gear 3 ... dummy shaft 4 ... washer 4a ... center hole 6 ... dummy shaft 6a ... center hole of dummy shaft 6b ... of dummy shaft End 6c: End face of dummy shaft 10: Washer guide shaft 11: First guide portion 12: Second guide portion 20: Dummy shaft positioning pin 30: Washer extrusion portion 40: First drive source (hydraulic cylinder) 50 ... Second drive source (hydraulic cylinder) 60 ... Third drive source (hydraulic cylinder) A, B ... Jig for assembling washer G ... Pinion gear assembly L ... Axis

Claims (1)

A washer assembling apparatus comprising a washer assembling jig for assembling a pinion gear and a washer, the washer assembling apparatus comprising:
The washer assembly jig is
A washer guide shaft which advances and retracts in the axial direction of the dummy shaft loaded in the axial hole of the pinion gear and extends in the axial direction and is inserted into the central hole of the washer to hold the washer;
Dummy shaft positioning concentrically arranged with respect to the washer guide shaft, advancing and retreating in the axial direction in the washer guide shaft, and inserting a tip into a central hole of the axially extending dummy shaft idea,
And a washer pusher for moving the washer held by the washer guide shaft toward the tip of the washer guide shaft.
A first drive source for moving the washer guide shaft in the axial direction;
A second drive source for moving the dummy shaft positioning pin in the axial direction;
And a third drive source for moving the washer pushing portion in the axial direction.
The first drive source is configured to simultaneously move the second drive source and the third drive source in the axial direction,
The first drive source is driven to advance the washer guide shaft, the dummy shaft positioning pin, and the washer push-out portion, and the tip of the washer guide shaft is brought into contact with the end surface of the dummy shaft.
Driving the second drive source to insert the tip end of the dummy shaft positioning pin into a central hole of the dummy shaft;
The third drive source is driven to push out the washer push-out portion to press the washer held by the washer guide shaft against the pinion gear, thereby, in the central hole of the washer, Inserting the end of the dummy shaft loaded in the axial hole of the pinion gear;
The second drive source is driven to retract the tip of the dummy shaft positioning pin from the center hole of the dummy shaft while the tip of the washer guide shaft is in contact with the end face of the dummy shaft. After that, a pinion gear assembly composed of the pinion gear, the washer, and the dummy shaft is configured to be taken out in a direction orthogonal to the axis .
Washer assembly device for pinion gear.

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