JPH08150522A - Retaining ring press-in device - Google Patents

Abstract

PURPOSE: To appropriately set a retaining ring prior to press-in, by retractably arranging a plurality of retaining ring holding members which are energized by an energizing member so as to be always projected from the inner surface of a retaining ring diameter contracting member, at predetermined intervals in the same plane, at the inner surface of the diameter contracting member. CONSTITUTION: A bearing is fitted in an opening of a knuckle arm while a retaining ring R is set on a plurality of retaining ring setting balls 45..., projected from the inner surface 43 of the a retaining ring diameter contracting member 41. In the case of loading the bearing, a bearing pressing member 41 is further lowered in a condition in which the retaining ring diameter contracting member 41 stops on the bearing, so that the retaining ring R set on the setting balls 45 is pressed by its shoulder part 34. Accordingly, the diameter of the retaining ring R is contracted along a tapered inner surface 42 while the balls 45 are pushed in against a spring, and the ring R is depressed horizontally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for press-fitting a retaining ring into an engaging groove.

[0002]

2. Description of the Related Art As a device for press-fitting a bearing and a retaining ring into a knuckle arm of an automobile, there has been hitherto been disclosed in Japanese Utility Model No.
Various devices such as No. 45634 or No. 62-104826 are proposed.

In all of these devices, the diameter of the retaining ring is reduced while being pushed down along the taper-shaped reducing member of the inner surface so that the retaining ring is fitted into the engaging groove at the opening edge of the knuckle arm. Is.

However, in this type of device, when the retaining ring is inserted into the diameter reducing member, it is difficult to position it correctly because the inner surface of the retaining ring has a taper shape, and the device may be placed diagonally. In such a case, not only can the diameters be properly reduced and press-fitted, but also it cannot be confirmed whether or not they have been placed one by one, which causes a problem that abnormal press-fitting may occur frequently.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to:
Another object of the present invention is to provide a new press-fitting device for a snap ring that enables normal mounting and confirmation of a snap ring prior to press-fitting.

[0006]

That is, the present invention provides a press-fitting device for a snap ring for achieving the above object,
A plurality of retaining ring holding members, which are urged by the urging member so as to always project from the inner surface, are provided on the inner surface in the vicinity of the upper end of the tubular retaining ring reducing member whose inner surface is tapered. In addition to being arranged so as to be retractable at intervals, a retaining ring press-fitting member having an end face as a pressing face of the retaining ring is disposed so as to be insertable into the diameter reducing member.

[0007]

Embodiments Now, the embodiments shown in the drawings will be described. Each of the drawings shows an embodiment of the present invention.

First, the general construction of this device will be described with reference to FIGS. 4 and 5. This device comprises a pair of knuckle arm supports 8 and 8 and a pair of hub supports 9 and 9. In order to press-fit the bearing B, the retaining ring R, and the hub H into the knuckle arm N on the base 1 and the knuckle arm support 8, the support knives 8 and 9 are reciprocated.
Further, in order to assemble the slider base plate 11 which moves up and down on these support bases 8 and 9 and the retaining ring R held therein to the knuckle arm N together with the bearing B, it was attached to the knuckle arm support base 8 side of the slider base plate 11. A pair of press-fitting units 3
0 and 30, and a pair of gripping units 50 and 50 attached to the hub support base 9 side to press the hub H gripped on the hub support base 9 into the bearing B.

Next, each part will be described in detail.
A pair of knuckle arm supports 8, 8 for holding the knuckle arm N with the bearing mounting opening N1 facing upward are fixed to one half of the first half, and the other half of the base 1 is A pair of hub supporting bases 9, 9 for holding the hub H with the bearing fitting portion H1 facing downward are fixed via a base 2 which is higher.

On the other hand, four stanchions 3 are erected on the base 1 so as to surround the knuckle arm supports 8 and 8 and vertical guide rails are provided on the opposite surfaces of these stanchions 3. A pair of lateral guide rails 5 and 5 for moving and displacing the assembly unit 10 in the horizontal direction and the vertical direction are slidably attached to the rail 4 via slide guides 6 and 6. A top plate 7 that supports a lifting drive cylinder 20 to be described later is integrally fixed to the top of.

On the other hand, the above-mentioned assembly unit 10
Has a function of press-fitting the retained retaining ring R together with the bearing B into the knuckle arm N and press-fitting the gripped hub H into the bearing B.
The slider base plate 11 having a base of 0 is arranged on both sides of the slider base plate 11 so as to move the press-fitting unit 30 and the hub gripping unit 50 mounted on the lower surface to positions directly above the knuckle arm support base 8 and the hub support base 9, respectively. Fixed sliders 12, 1
A bracket 16 which is slidably attached to the lateral guide rails 5 and 5 via 2 and is fixed to one end of the substrate 11.
Is coupled to a rod 15 of a lateral feed cylinder 14 attached to a part of the guide rail 5 via brackets 13, 13, so that the guide rail 5 is driven laterally.

The slider board 11 also includes a press-fitting unit 30 and a hub gripping unit 50, respectively.
The guide rail 18 fixed to the upper surface of the slide substrate 11 via the brackets 17 and 17 is provided with front, rear, left and right sides. An elevating plate 22 is movably attached to the elevating plate 20 via rollers 23, and a rod 21 of an elevating cylinder 20 standing on the top plate 7 is fixed to the elevating plate 22. Thus, the slide substrate 11 can be driven up and down.

Reference numeral 25 in the figure denotes a positioning cylinder for the slide substrate 11, and as shown in FIG. 5, the rod 26 is inserted into two front and rear positioning holes 19a and 19b provided in the slide substrate 11. , The press-fitting unit 30 and the hub gripping unit 50 respectively
It is configured to be positioned directly above the frame support base 8 and the hub support base 9.

On the other hand, the press-fitting unit 30 described above is shown in FIG.
As shown in FIG. 2, the slide substrate 1 includes the bearing press-fitting member 31 and the retaining ring diameter-reducing member 41.
It is arranged on the lower surface of 1 so as to face the arm supporting bases 8, 8.

The bearing press-fitting member 31 is for simultaneously press-fitting the retaining ring R and the bearing B, and the cylindrical main body 33 with a flange fixed to the lower surface of the slide substrate 11 by the bolt 32 is mounted on the knuckle arm N bearing. Has a slightly smaller outer diameter than the opening N1 for use, and the shoulder portion 34 at the lower end thereof serves as a pressing surface of the retaining ring R, and further, at the center of the shoulder portion 34, is inserted into the hole B1 of the bearing B. A projecting portion 35 for centering is integrally provided.

A longitudinal groove 36 in which a ridge 43 for determining a degree provided on a retaining ring diameter reducing member 41 to be slid is provided on a part of the circumference of the main body 33, and a shoulder of the main body 33 is provided. Part 34
Has notches R1 at both sides of the vertical groove 36 when the retaining ring R is fitted in the retaining ring fitting groove N2 of the knuckle arm N.
Mounting condition detection sensor S1 for detecting the degree of opening of the
, S1 are fixed by retaining screws 37, and the retaining ring R when the shoulder 34 is engaged with the retaining ring fitting groove N2 of the knuckle arm N at a portion facing the vertical groove 36.
A second mounting condition detecting sensor S2 for detecting the mounting condition on the basis of the opening degree is fixed with a stop screw 38 (FIG. 2). A bearing detecting sensor S3 for detecting the presence or absence of the bearing B is attached to the inside by a screw 38.

On the other hand, the retaining ring diameter reducing member 41 descends together with the bearing press-fitting member 31 to reduce the diameter of the retaining ring R by means of the tapered inner surface 42 of the knuckle arm N.
The support plate 47 for supporting the retaining ring diameter reducing member 41, which is fitted in the retaining ring fitting groove N2 of FIG. 5, has four guides vertically provided on the lower surface of the slide substrate 11, as shown in FIG. A compression spring 49 is mounted on the rod 48 so that it can slide freely.
It is always installed in a downwardly biased state.

The retaining ring reducing member 41 is provided with a retaining ring fitting groove N2 of the knuckle arm N from a state where the retaining ring R is freely expanded.
The inner surface 42 so that the diameter can be reduced to the extent that it can be fitted to
Is formed as a taper surface of an upwardly expanding shape, and a ridge 43 for determining the engagement with the notch R1 of the retaining ring R is formed on a part of the inner surface 42 thereof. A plurality of balls 45, on which the retaining ring R is mounted, are fixed vertically with a screw 44, and further on the upper part of the member 41 so as to always project from the inner surface 42 as a retaining ring loading / unloading member. They are arranged at equal intervals while being pressed by the pulling 46.

On this snap ring reducing member 41, a snap ring detecting sensor S4 is directed toward the inner surface 42 immediately above the disposition level L (FIG. 1) of the snap ring mounting ball 45 described above. An abnormal mounting state when a plurality of retaining rings R are mounted is detected above the sensor S4 (FIG. 2) which is separated from the sensor S4 by a distance corresponding to the thickness of the retaining ring R. A multi-sheet detection sensor S5 is also arranged toward the inner surface 42.

On the other hand, the hub gripping unit 50 provided on the lower surface of the slide base plate 11 on the hub support base 9 side carries the hub H from the hub support base 9 onto the knuckle arm support base 8 and places it in the hole B1 of the bearing B. It has a function to be inserted inside,
The hub gripping unit 50 includes a hub press-fitting member 51 and a hub gripping member 54 that holds the hub H on the member 51.

As shown in FIG. 5, the hub press-fitting member 51 has a projection 52 formed at the center of its tip and inserted into the center hole H1 of the hub H, and the surface on the outer periphery thereof is the flange of the hub H. It is configured as a pressing surface 53 that presses H2.

On the other hand, the hub gripping member 54 has a rack and pinion mechanism as shown in FIG. 6, is pivotally supported by the support plate 55 and is driven by a drive motor (not shown) to rotate. A pair of racks 57 and 57 are engaged with the pinion 56 with the shaft interposed therebetween, and the hub H is gripped by gripping claws 59 and 59 provided at the ends of the arms 58 and 58 of the racks 57 and 57. Is configured.

On the other hand, FIG. 7 shows an example of the control mechanism of this apparatus. The solenoid valve switching control means 62 provided in the control circuit 60 controls switching of the solenoid valve of the lifting cylinder 20 by the external operation button 61, and the control means 62 is lowered by the output signal from the reversal signal output means 65. From the OR circuit 63 to the neutral position by the signal from the OR circuit 63, and the OR circuit 63 operates to detect the snap ring detection sensor S4 or multiple sheets. A switching signal for switching to the neutral position is output to the solenoid valve switching control means 62 by the detection signal of any one of the sensors S5, an abnormal signal is output to the notification means 68, and the reversal signal output means 65 is A first timer that outputs when the retaining ring diameter reducing member 41 contacts the bearing B when the bearing detection sensor S3 does not detect the bearing B And outputs the inverted signal of the signal awaiting to rise from the lowered to the solenoid valve switching control means 62 from 4, is configured to output an abnormality signal to the notification means 68, further AND circuit 67,
The second timer 66 which outputs at the stage where the press-fitting of the bearing B is completed
An abnormal signal is output to the notifying means 68 in response to the output signal from the sensor and the mounting failure signals from the first and second mounting condition detection sensors S1 and S2.

Next, the operation of the apparatus thus constructed will be described with reference to FIG. In order to assemble the bearing B, the retaining ring S and the hub H to the knuckle arm N of the automobile, the state shown in FIG. 5, that is, the press-fitting unit 30 and the hub gripping unit 50 are the knuckle arm support 8 and the hub support, respectively. Under the state of being pulled up above 9, the knuckle arm supports 8 and 8 and the hub supports 9 and 9, respectively,
The left and right knuckle arms N and the hub H are placed, and the retaining rings R are placed on the plurality of retaining ring mounting balls 45 protruding from the inner surface 43 of the retaining ring reducing member 41. Insert the bearing B into the opening N1 of the knuckle arm N (step a).

As a result, as shown in FIG. 2, the bearing B is locked above the snap ring fitting groove N2 of the knuckle arm N formed slightly larger than its outer diameter. Next, the external operation button 61 is operated to detect the mounting state of the retaining ring R by the retaining ring detection sensor S4 and the multiple sheet detection sensor S5 of the retaining ring diameter reducing member 41 before the operation of the lifting cylinder 20 is started. (Stepro).

If the retaining ring R is not correctly placed on the retaining ring mounting ball 45, the retaining ring detecting sensor provided immediately above the level L of the ball 45 is detected. This state is confirmed by the L level output signal output when S4 does not detect the snap ring R, and when two or more sheets are placed, the snap ring detection sensor S4 This state is confirmed by the H level signal from the multi-sheet detection sensor S5 disposed above the thickness of R, and the lifting cylinder 20 is disabled (step d), and the notifying means 68 is operated. To inform the operator of the poor mounting (step E).

When the retaining ring R is normally placed, the lifting cylinder 20 is operated to operate the slide substrate 1.
1 is lowered (step F), and the retaining ring R is first moved by the shoulder portion 34 of the bearing pressing member 31 that has descended.
5A, the diameter reducing member 41 is lowered through the retaining ring R until the lower end of the ridge 43 for determining the abutment contacts the bearing B, and at that point, the press fitting is performed. Member 3
The bearing detection sensor S3 provided in No. 1 detects the bearing B based on the brightness at the time of contact (step
G).

When the bearing B is not loaded, the first timer 6 which outputs at this point
Inversion signal output means 65 outputs an inversion signal in response to a signal from No. 4, and this is input to solenoid valve switching means 62 to turn up / down cylinder 20 to move up, and slide substrate 1
Return 1 to its original position (step
(I) The notification means 68 is operated to notify the operator that the bearing B is not loaded (step N).

On the other hand, when the bearing B is loaded, as shown in FIG. 7A, the bearing press-fitting member 41 is held under the condition that the retaining ring diameter reducing member 41 is stopped on the bearing B. 31 is further lowered, the retaining ring R on the mounting ball 45 is pressed by the shoulder portion 34 thereof, and the retaining ring R is tapered while pushing the ball 45 against the spring 46. The diameter is reduced along the upper inner surface 42, and the inner surface 42 is pushed down horizontally.

In this way, when the retaining ring R pushed down by the press-fitting member 31 is finally reduced in diameter until it becomes equal to the outer diameter of the bearing B and pressure-bonded to the top of the bearing B, the press-fitting member 31 is As shown in (b), the protrusion 35 penetrates into the hole B1 of the bearing B, and while centering this, the protrusion 35 is further pushed into the hole N1 of the knuckle arm N.

When the bearing B is completely press-fitted into the hole N1 of the knuckle arm N, the retaining ring R on the bearing B also reaches the position matching the fitting groove N2 of the knuckle arm N at the same time. The ring R expands into the fitting groove N2 by its own elasticity without the notch R1 being caught by the step 34a provided on the shoulder 34.

As a result, the retaining ring R is expanded and deformed from FIG. 4A to FIG. 4B. In this state, the vertical groove 3
First mounting condition detection sensors S1 and S provided on both sides of 6
As shown in FIG. 4 (b), reference numeral 1 indicates a mounting condition which is deviated from the notch R1 of the retaining ring R to detect the mounting condition based on the opening condition, and a second mounting condition provided on the opposite side. The detection sensor S2 also deviates from the inner peripheral edge of the retaining ring R and detects the fitting state from the expanded state (stepping).

When the retaining ring R cannot be completely fitted in the fitting groove N2 and the output signals from the detection sensors S1 and S2 are maintained at the H level as they are, the AND circuit 67 outputs the second timer at this time. In response to the signals from 68 and these signals, an abnormal signal is output to the notifying means 68 to notify the worker of the mounting failure, and when the mounting is normally performed, according to a preset program. The slide substrate 11 is raised.

On the other hand, in the final stage of the lowering operation of the slide substrate 11, the hub press-fitting member 51 which is in contact with the hub H on the hub support 9 has the protrusion 52 at the center thereof in the central hole H of the hub H.
The pinion 56, which was inserted into 1 and started to rotate at the same time by being driven by a drive motor (not shown),
The arms 58, 58 are contracted via 5, 55, and the hub H is clamped by the gripping claws 59, 59.

Then, the slide substrate 11 described above is used.
The shaft H1 of the clamped hub H is press-fitted into the hole B1 of the bearing B by the press-fitting member 51 by the lifting of the hub H and the subsequent lateral movement to the side of the knuckle arm support 8 and the subsequent downward movement. Then, a series of assembling operations are completed.

Although the present invention has been described above with reference to the example of the device for assembling the bearing B and the retaining ring R to the knuckle arm N, the C ring is press-fitted into the press-fitted member together with the press-fitted member and locked. The present invention can be applied to other press-fitting devices.

[0037]

As described above, according to the present invention, since a plurality of retaining ring holding members are arranged so as to be retractable on the inner surface in the vicinity of the upper end portion of the tubular diameter reducing member, the retaining ring is provided on the retaining ring retaining members. By mounting, it is possible to prevent oblique press-fitting and to press-fit it accurately.

Moreover, since the retaining ring detecting means is provided directly above these holding members, and the multiple detecting members are provided above the detecting means by the thickness of the retaining rings, the retaining rings are mounted. It is possible to immediately detect a work error such as the absence or mounting of a plurality of retaining rings, and eliminate any abnormal assembly associated therewith.

[Brief description of drawings]

FIG. 1 is a perspective view showing a bearing press-fitting member and a retaining ring diameter reducing member according to an embodiment of the present invention.

FIG. 2 is a side view of the both members shown in a state immediately before the start of press fitting.

3 (a) and 3 (b) are views showing a snap ring diameter reducing process and a bearing press-fitting process.

FIG. 4 is a perspective view showing the whole of an apparatus constituting an embodiment of the present invention.

FIG. 5 is a side view of the same apparatus.

FIG. 6 is a bottom view showing a hub gripping unit.

FIG. 7 is a diagram showing an example of an operation control device.

FIG. 8 is a flow chart showing a press-fitting operation.

[Explanation of symbols]

 8 Knuckle arm support 9 Hub support 10 Assembly unit 11 Slide board 14 Traverse cylinder 20 Elevating cylinder 30 Press-fitting unit 31 Bearing press-fitting member 41 Retaining ring diameter reducing member 50 Hub gripping unit 51 Press-fitting member 54 Gripping member S4 stop Wheel detection sensor S5 Tasaka detection sensor N Knuckle arm B Bearing R Retaining ring H Hub

Claims (3)

[Claims] 1. A plurality of retaining rings urged by an urging member so as to always protrude from the inner surface near the upper end of a tubular retaining ring contracting member having a tapered inner surface. The holding members are arranged on the same plane so as to be retractable so as to be retractable, and a retaining ring press-fitting member whose end surface is a pressing surface of the retaining ring is disposed so as to be insertable into the diameter reducing member. Press-fitting device for snap ring. 2. A retaining ring detecting means for detecting the presence or absence of the retaining ring is disposed immediately above the inner surface of the reducing member where the retaining ring holding member is disposed. Retaining ring press-fitting device. 3. The upper inner surface of the retaining ring detecting means is separated by a distance corresponding to the thickness of the retaining ring in the diameter reducing member.
A press-fitting device for a snap ring, comprising a plurality of snap ring detecting means for detecting whether or not a plurality of snap rings have been loaded.