JPH02274437A - Building device for toothed part - Google Patents

Abstract

PURPOSE:To eliminate the necessity for phase alignment between male and female teeth at the time of shrinking the concerned size for simplifying a device so as to perform work efficiently by providing a pair of mutually opposing compression jig which advance and retract in a direction at right angles to the moving direction of toothed part assembly. CONSTITUTION:A shaft 1 is lowered by a cylinder 13 till a peripheral groove 4, formed in a spline 3, reaches the height of a compressing jig 40 advanced by a cylinder 43 shrinking a snap ring 5 in its size. Lowering cylinders 18, 44 with the spline 3 adapted to a spline of an inner ring 7 of a joint part 2 and a curved surface of the compressing jig 40 adapted to a tapered surface of a shaft hole 8, the shaft 1 is rotated swiveling through a swivel link 32, chuck 34 and an arm 35, and the shaft 1 is pressed into the shaft hole 8, when a phase of the spline 3 agrees with a phase of the spline of the inner ring 7, by pressing the shaft to the inner wheel 7 by the cylinder 18. The snap ring 5 lowers along opposed internal surfaces of the compressing jig 40 and moves to the shaft hole 8 with its size left as shrunk, and when the shaft 1 is further lowered by the cylinder 13, the groove 4 of the shaft 1 is aligned in a peripheral groove of the shaft hole 8, spreading the snap ring 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an assembly device for toothed parts having teeth that engage with each other, such as a male spline and a female spline.

[Conventional technology]

Examples of a pair of parts having a free spline and a female spline include a constant velocity joint shaft and a joint composite part (consisting of an inner and outer ring, a retainer, and a ball).

In this case, a male spline is formed on the shaft and a female spline is formed on the inner ring of the joint composite part. The conventional method for assembling the above two parts is to insert the spline of the shaft into the shaft hole of the inner ring, and to prevent rotation by interlocking both splines, and to attach the spline of the shaft to the shaft hole. A method is used in which a circlip is fitted into the formed circumferential groove and the circlip is engaged with the inner ring to prevent them from coming off each other. In this case, the outer diameter of the circlip is normally larger than the inner diameter of the spline hole in the inner ring, so when inserting the shaft into the inner ring, it is necessary to apply external force to reduce the diameter of the circlip. .

Conventionally, the method for reducing the diameter of a circlip was to use special nippers to manually reduce the size of the circlip, align the shaft and inner ring splines, and then press fit the shaft. Ta.

However, this method requires skill in the use of special nippers and has problems such as large variations in the number of man-hours.

For this reason, there has been a proposal for an automatic assembly device that automatically performs the above operations (see Japanese Patent Laid-Open No. 61-284333). In this device, a guide member having a tapered hole is provided as a means for reducing the circlip, and the guide member is disposed coaxially and overlappingly on the front surface of the inner ring. A spline that matches the spline of the shaft is formed in the above-mentioned tapered hole, and the inner diameter of the smaller diameter side is part of the inner diameter of the inner ring.

In the above device, the shaft with the circlip attached faces the large-diameter end of the tapered hole of the guide member, and after the splines of the shaft and the tapered hole are aligned, the shaft is inserted and the taper is adjusted. Reduce the circlip within the hole.

When the tip of the shaft faces the end of the inner ring, the splines between the shaft and the inner ring are again aligned in phase, and then the shaft is press-fitted together with the circlip into the inner ring.

C invention tries to solve tl! ! [Problem] In the automatic assembly device described above, it is necessary to align the splines of the shaft and the tapered hole twice, and the splines of the shaft and the inner ring twice, which makes the device complicated and reduces work efficiency. There's a problem.

Therefore, it is an object of the present invention to simplify the device and improve work efficiency by reducing the number of phase alignments to one.

(Means for Solving the Problems) In order to achieve the above object, the toothed parts assembly device of the present invention mounts a first part having male teeth and a second part having female teeth on the same axis. Phasing of male and female teeth by providing a first support means and a second support means that are supported independently and moved relative to each other in the axial direction, and rotating one of the support means by a predetermined angle on the axis with respect to the other support means. circlip compression means are arranged on both sides of the axis, and the compression means is provided with a compression jig that moves forward and backward in directions perpendicular to and opposite to the axis.

[Effect]

The circlip is loosely fitted in advance into the circumferential groove formed in the male tooth portion of the first part. the first part and the second part respectively
While being supported by the support means and the second support means, the first support means is moved and its movement is stopped when the circlip attachment portion of the first component comes to the position of the compression jig.

In this state, a compression jig is advanced from both sides to compress the circlip and reduce its diameter.

Thereafter, one or both of the first support means and the second support means is moved toward each other while compressing the circlip with a compression jig, and the movement is temporarily stopped when both parts are in contact with each other. At the same time, the compression jig is applied to the end surface of the female tooth hole of the second part. In this state, the phasing means is driven to align the phases of both teeth, and then the above movement is restarted and the two parts are fitted together. As the fitting progresses, the circlip is moved to the inner surface of the compression jig. While maintaining the reduced diameter state, it partially moves into the two parts and moves to a predetermined engagement position.

[Example] The toothed parts assembly device of the example shown in FIG. The assembly device is shown. The shaft 1 has splines 3 at both ends (FIG. 5). A circumferential groove 4 is formed at the spline 3, and a circlip 5 is loosely attached to the circumferential groove 4. As shown in FIG. 4, the circlip 5 is a metal ring with a cutaway portion 6 provided in a part thereof.

A shaft hole 8 is formed in the inner ring 7 of the joint composite part 2 (FIG. 5), and a spline 9 is formed on the inner peripheral surface thereof (FIG. 6). Further, a circumferential groove 10 is formed in the middle of the spline S, and forms a storage space for the circlip 5 together with the circumferential groove 4 of the shaft 1.

As shown in FIG. 1, the support device 11 for the shaft 1 includes a main pressure cylinder 13 mounted on a fixed frame 12, a movable frame 15 mounted on the fixed frame 14, and a bearing between the fixed frame 12 and the movable frame 15. 16 are interposed. The movable frame 15 is driven by the main pressure cylinder 13 in the vertical direction (see arrow a).

An auxiliary pressure cylinder 18 is mounted on a step 17 of the movable frame 15, and its piston shaft 19 is connected to a bearing box 20 that moves up and down. The bearing box 20 is guided in the vertical direction by a guide rod 21 fixed to the step 17 mentioned above. The bearing box 20 rotatably supports the upper end of the relay shaft 22.

The relay shaft 22 passes through a bearing box 23 fixed to the movable frame 15 and reaches the lower end of the movable frame 15.

A motor 25 is attached to the side surface of the movable frame 15 with a bracket 24, and a motor shaft 26 extends downward.
An eccentric cam plate 27 is attached to the lower end of. Further, a planar swinging arm 28 is attached to the above-mentioned bracket 24 so as to be swingable by a support shaft 29 (see Fig. 3).
A long hole 30 into which the eccentric ring 27 is loosely fitted is formed in the swing arm 28 in the middle thereof. Further, a guide rod 31 is fixed to the tip of the moving arm 28. A swing link 32 having a U-shaped retaining portion is fitted into the middle of the guide rod 31 .

The moving link 32 is connected to the relay shaft 22 in the middle thereof.
and are connected by a bottle 33. Furthermore, a chuck 34 is attached to the tip of the swing link 32. The chuck 34 has a chuck arm 35 extending below the relay shaft 22.

The chuck arm 35 holds the upper end of the shaft 1 and presses it against the lower end of the relay shaft 22, thereby supporting the shaft 1 on the same axis as the relay shaft 22.

A support device 38 for the joint composite component 2 is provided below the above-mentioned support device 11 to face it. In the case shown in the figure, a hole is provided in the fixed board surface into which the shaft portion of the joint composite component 2 is inserted. It has a simple structure and is positioned so that the axis of the inner ring 7 of the joint composite part 2 coincides with the axis of the shaft 1.

Further, circlip compression devices 39 are provided on both sides of the above-mentioned support device 38, and a compression jig 40 thereof is disposed opposite to the lower end of the shaft 1 and the intermediate portion of the joint composite component 2.

The circlip compression device 39 has a movable base 42 mounted on a base 41 that slides in a direction perpendicular to the axis of the shaft 1 (see the arrow), and a horizontal cylinder 43 attached to the base 41.
to slide the movable base 42. When the movable table 42 is moved forward, the compression jig 40 moves in the direction of the shaft 1.

A vertical cylinder 44 is mounted on the movable base 42, and a jig support base 45 is provided at the lower end of the vertical cylinder 44. The jig support base 45 moves vertically on the vertical surface of the movable base 42 via a bearing 46 (see arrow C).

A bent surface 47 is formed on the lower surface of the tip of the compression jig 40 supported by the jig support 45 described above. The shape of the bent surface 47 is such that it matches the tapered surface 48 (FIG. 6) of the shaft hole 8 of the inner ring 7.

Next, the operation of the above device will be explained. In the illustrated case, two boots 49 and a boot band 50 are inserted into the shaft 1 in advance (FIG. 1), and the spline portion at the upper end thereof is supported by the chuck arm 35.

Further, the joint composite part 2 is inserted into the lower support device 38, and faces the shaft 1 on the same axis.

The main pressure cylinder 13 is driven to lower the movable frame 15 (Fig. 6), and the movable frame 15 is stopped when the circumferential groove 4 formed in the spline 3 at its lower end reaches the height of the compression jig 40 (
FIG. 7) Next, the horizontal cylinder 43 of the circlip compression device 39 is driven to advance the compression jig 40, which is pressed against both sides of the circlip 5 to reduce its diameter (
Figure 8).

Next, the auxiliary pressure cylinder 18 and the vertical cylinder 44 are lowered simultaneously and at the same speed, and the spline 3 of the shaft 1 is lowered.
The lower end of the compression jig 40 is brought into contact with the upper end of the spline 9 of the inner ring 7, and at the same time the curved surface 47 of the compression jig 40 is pressed against the tapered surface of the shaft hole 8 of the inner ring 7 (FIG. 9).

In this state, the motor 25 and the auxiliary pressure cylinder 18 are simultaneously driven. The motor 25 gives a certain angle of swing rotation to the shaft (2) through the eccentric cam plate 27, the swing arm 28, the swing link 32, the chuck 34, and the chuck arm 35, and changes the phase of the spline 3 of the shaft 1 and the spline of the inner ring 7. Match the phase of 9.

Note that, due to the swinging of the swinging link 32, the relay shaft 22 also rotates by a certain angle, thereby eliminating friction with the upper end surface of the shaft 1.

Further, by driving the auxiliary pressure cylinder 18 that is driven simultaneously with the motor 25, the lower end of the shaft 1 is pressed against the open end of the inner ring 7 via its piston shaft 19, the bearing box 20 integrated therewith, and the relay shaft 22.

Since the shaft 1 is rotated by a certain angle by the rotation of the motor 25 as described above, the phase of the spline 3 is the same as that of the inner ring 7.
When the phase of the spline 9 matches, the cylinder 1 is pushed into the shaft hole 8 by the stroke amount of the auxiliary pressure cylinder 18 (Fig. 1 θ).

At this time, the circlip 5 slides down on the opposing inner surface of the compression jig 40 and moves into the shaft hole 8 together with the cylinder 1 while maintaining the reduced diameter state. When the circlip 5 moves to the shaft hole 8, the compression jig 40 retreats to its original state (first
Figure 1).

When the shaft 1 is further lowered by the main pressure cylinder 13, the circumferential groove 4 of the shaft 1 coincides with the circumferential groove 9 of the shaft hole 8.
The circlip 5 expands due to its elasticity in the annular cavity formed by the two circumferential grooves 4.10, and the shaft 1
(Fig. 12).

When the load applied to the shaft 1 exceeds a certain level, the load is determined by an appropriately installed load measuring device, and the main pressure cylinder 13
to stop. Figure 5 shows the shaft 1
This is a constant velocity joint that has been combined with the joint composite part 2.

In addition, if the circlip 5 does not fit into the circumferential groove 4, the main pressure cylinder 13 or the auxiliary pressure cylinder 1
Since the reaction force acting on the circlip 8 is smaller than in the normal case, the presence or absence of the circlip 5 can be inspected by detecting the magnitude of the reaction force with an appropriate load sensor.

〔Effect of the invention〕

As described above, this invention provides a pair of opposing compression jigs that move forward and backward in a direction perpendicular to the moving direction of the toothed parts assembly, and reduces the diameter of the circlip as it comes out. There is no need to phase match the male and female teeth during diameter reduction (
The phase alignment only needs to be done once when the male teeth mesh with the female teeth, which simplifies the configuration of the assembly device and improves production efficiency.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view of the device of the embodiment, Fig. 2 is a longitudinal sectional front view of the same as above, Fig. 3 is a partially enlarged cross-sectional plan view of Fig. 2, and Fig. 4
FIG. 5 is a front view of the circlip, FIG. 5 is a sectional view of the constant velocity joint after assembly is completed, and FIGS. 6 to 12 are sectional views illustrating the order of operation. 1...Shaft, 2...Joint composite part, 3...Spline, 4...Peripheral groove, 5...Circlip, 7 ...Inner ring, 8...Shaft hole, 9...Spline, 10...Peripheral groove, 11...
... Support device, 12 ... Fixed frame,
13... Main pressure cylinder, 14... Piston shaft, 15... Movable frame for, 16... Bearing, 17... Stage, 18... ...Auxiliary pressure cylinder, 19...Piston shaft, 20...Bearing box, 21...Guide rod, 22...
Relay shaft, 23...Bearing box, 24...
...Bracket, 25...Motor, 2
6...Motor shaft, 27...Eccentric cam plate, 28...Swing arm, 29...Support shaft, 30...Length Hole, 31...
Guide rod, 32... Swing link, 33...
...Pin, 34...Chuck,
35... Chuck arm, 38... Support device, 39... Circlip compression device, 40...
...Compression jig, 41...Base, 42...
...Movable base, 43...Horizontal cylinder,
44... Vertical cylinder, 45... Jig support, 46... Bearing, 47...
...Bent surface, 48...Tapered surface, 49...
...Boots, 50...Boot band. Figure 6 Figure 10 Figure 7 Figure 11 Figure 8 Figure 12 Figure 9

Claims (1)

[Claims] (1) Provide a first support means and a second support means for independently supporting a first part having male teeth and a second part having female teeth on the same axis and moving them relative to each other in the axial direction; The supporting means is provided with phasing means for rotating male and female teeth by a predetermined angle on the axis relative to the other supporting means, and circlip compression means are arranged on both sides of the axis, and the compression means is provided with phasing means for rotating the male and female teeth at a required angle on the axis with respect to the other supporting means. An assembly device for toothed parts that is equipped with a compression jig that moves forward and backward in opposite directions.