JPH04336930A - Workpiece support device - Google Patents

Abstract

PURPOSE:To enable the proper position of a workpiece to support a pressing load via simple selective operation in pressing a bearing and a hub. CONSTITUTION:A cylindrical base body 21 is fitted to a stationary side base 22, and the first support member 25 is so provided inside the base body 21 as to be freely liftable. Also, a support seat 30 is fitted to the upper end of the first support member 25, and there are provided a rotary member 35 capable of turning around the first support member 25 and a lift mechanism 60 having a cam means 37. When the rotary member 35 is caused to rotate by the predetermined extent, the cam means 37 acts to lift the first support member 25 by the predetermined extent. The second support member 62 laid inside the first support member 25 concentrically therewith is fixed to the side of the base 22. The upper end of the second support member 62 is fitted with a bearing seat 66 to support the inner ring 9 of a bearing 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece support device used to receive a press-fitting load when a bearing is press-fitted into a housing and a hub is press-fitted into a bearing.

0002

2. Description of the Related Art An example of a workpiece 1 shown in FIG. 15 is used for a bearing part of an automobile wheel, and includes a cylindrical housing 2, a bearing 3 housed in the housing 2, and a bearing 3. It includes a hub 5 to be inserted, a C-shaped retaining ring 6 to prevent the bearing 3 from coming out, and the like. The retaining ring 6 is inserted into an annular groove 7 formed on the inner peripheral surface of the housing 2 . The retaining ring 6 has a shape as shown in FIG. 16, and is inserted into the groove 7 from the open end 2c side of the housing 2 with the diameter of the retaining ring 6 reduced using a tool (not shown). The bearing 3 consists of an outer ring 8, an inner ring 9, balls 10, and the like.

As shown in FIG. 17, the outer ring 8 of the bearing 3 is press-fitted into the hollow hole 2a of the housing 2 from the open end 2c. The shaft portion 5a of the hub 5 is press-fitted into the inner ring 9 of the bearing 3. Therefore, when press-fitting the bearing 3 and the hub 5, in order to receive the press-fitting load at the appropriate location,
A dedicated support jig is required.

That is, when press-fitting the bearing 3 into the housing 2, the press-fitting load is applied to the housing 2 through the outer ring 8.
, so when housing 2 is supported from below,
It is necessary to press the upper end surface of the outer ring 8 in the axial direction using a press-fitting device. Furthermore, when the hub 5 is press-fitted into the bearing 3 that has been press-fitted into the housing 2, the press-fitting load is transmitted to the inner ring 9 through the hub 5. It is necessary to press 5 in the axial direction using a press-fitting device.

Therefore, conventionally, when assembling the workpiece 1, a first support jig for supporting the housing 2 and a second support jig for supporting the inner ring 9 are prepared, and when the bearing 3 is press-fitted, a first support jig for supporting the housing 2 and a second support jig for supporting the inner ring 9 are prepared. The first support jig was used to perform the press-fitting operation, and when the hub 5 was press-fitted, the second support jig was used to perform the press-fitting operation.

[0006]

As mentioned above, conventionally, a first support jig for press-fitting the bearing 3 and a second support jig for press-fitting the hub 5 are required. It took time and effort to set up work in each press-fitting process, which not only led to poor work efficiency, but also required time and effort to manage support jigs.

Therefore, an object of the present invention is to perform a simple switching operation when press-fitting a bearing and press-fitting a hub.
It is an object of the present invention to provide a workpiece support device capable of supporting a press-fitting load at an appropriate location on a workpiece.

[0008]

[Means for Solving the Problems] The device of the present invention developed to achieve the above object includes a cylindrical base provided on a fixed base, and a cylindrical base provided inside the base so as to be movable up and down, and at the upper end. a first support member provided with a housing support seat capable of supporting the housing; a rotating member rotatably provided around an axis with respect to the first supporting member; and this rotating member serves as the first supporting member. a lift mechanism having a cam means for converting rotational force into a movement in a direction of lifting the first support member when rotated against the base; and a lift mechanism arranged concentrically inside the first support member and the base. The workpiece supporting device is provided with a second support member fixed to the side and having an inner ring support seat at the upper end capable of supporting the end face of the inner ring of the bearing.

[0009]

[Operation] When press-fitting the bearing into the housing, the first support member is raised by a predetermined amount by the cam means by rotating the rotating member to a predetermined position. The housing placed on the first support member in this state is
It is supported by the housing support seat of the first support member. The bearing is press-fitted into the housing by setting the bearing on top of the housing and pressing the outer ring of the bearing in the axial direction with a press-fitting device. The press-fitting load at this time is transmitted to the housing via the outer ring of the bearing, and is supported by the first support member.

When the hub is press-fitted into the bearing that has been press-fitted into the housing, the rotating member is rotated to a predetermined position to shift the position of the cam means and lower the first support member. By doing this,
The inner ring support seat of the second support member is raised relative to the first support member, and the lower end surface of the inner ring is supported by the inner ring support seat. In this state, set the hub on the bearing,
By pressing the hub in the axial direction with the press-fitting device, the shaft portion of the hub is press-fitted into the inner ring of the bearing. The press-fitting load at this time is transmitted to the inner ring of the bearing via the hub, and is supported by the second support member.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to a work assembly machine 11 shown in the drawings. As shown in FIG. 2, the workpiece assembly machine 11 includes a workpiece support device 12 located at the lower side in the figure and a press-fitting device 13 located at the upper side in the figure. The workpiece support device 12 is configured as shown in FIGS. 1 to 5. First, this workpiece support device 12 will be explained.

As shown in FIG. 1, a press-fit load supporting member 16 and a load cell 17 (only a portion of which is shown) are provided on a fixed base 15 extending in the horizontal direction. A work holder unit 20 is provided above the press-fit load supporting member 16.

The work holder unit 20 includes a cylindrical base body 21 extending upward. The base body 21 is fixed to a fixed base 22 provided above the base 15 with bolts or the like. A cylindrical first support member 25 is provided inside the base 21 so as to be concentric with the base 21 .

The first support member 25 is held movably up and down in the axial direction of the base body 21, and is prevented from rotating by a pin 26 so as not to rotate relative to the base body 21. An annular housing support seat 30 is provided at the upper end of the first support member 25 . The outer diameter of this support seat 30 is larger than the inner diameter of the flange-shaped step portion 2b provided on the inner peripheral surface of the housing 2. Therefore, the support seat 30 can be in contact with the step portion 2b.

As shown in FIG. 4, etc., a flange-shaped portion 31 is provided at the lower part of the first support member 25.
A plurality of cam receiving portions 32 are provided on the lower surface of this portion 31 at equal pitches in the circumferential direction.

A rotating member 35 is provided below the cam receiving portion 32. On the upper surface side of the rotating member 35, a plurality of cams 36 are provided at equal pitches in the circumferential direction at positions corresponding to the cam receiving portions 32. The cam 36 and the cam receiving part 32 are arranged so that they can face each other.

The cam receiving portion 32 and the cam 36 are connected to the rotating member 3.
A cam means 37 is configured for converting the rotational force of 5 into a force for raising the first support member 25. That is, when the rotary member 35 rotates by a predetermined angle in the circumferential direction with respect to the first support member 25, the cam 36 slides under the cam receiving portion 32 as shown in FIG. The member 25 is raised by a predetermined amount H.

As shown in FIG. 5, when the rotating member 35 returns to its initial position, the first support member 25 descends to its original height. At the contact portion between the cam receiving portion 32 and the cam 36,
An inclined surface 38 is provided to facilitate the sliding of the cam 36 under the cam receiver 32 when the rotating member 35 rotates toward the lift position shown in FIG.

The rotating member 35 is reciprocated about the axis of the base body 21 by a rotating operation mechanism 41 shown in FIG. 3 and the like. The rotation operation mechanism 41 includes an arc-shaped interlocking member 43 connected to the rotation member 35 by a pin 42. The pin 42 passes through a through hole 44 provided in the base body 21 and is fitted into a receiving hole 45 of the rotating member 35 .

A roller 51 is provided at the tip of a lever 50 fixed to the interlocking member 43. Roller 51 is engaged with end 53 of drive arm 52 . The drive arm 52 is an actuator 5 such as an air cylinder.
5, it can be rotated reciprocally about a shaft 56 in the direction of arrow F1 in FIG. When the drive arm 52 is rotated by the rod 58 of the actuator 55, the interlocking member 43 is rotated via the roller 51 and lever 50, and the rotating member 35 is rotated in the same direction as the interlocking member 43. .

The above-mentioned rotating member 35, cam means 37, rotation operation mechanism 41, etc. constitute a lift mechanism 60 for moving the first support member 25 up and down. In this embodiment, the lever 5 is moved by the mechanical force of the actuator 55 or the like.
0, however, in some cases, a configuration may be adopted in which a member corresponding to the lever 50 is rotated by manual operation.

As shown in FIG. 1 and the like, a cylindrical second support member 62 is provided inside the first support member 25 so as to be concentric with the first support member 25. As shown in FIG. The base of the second support member 62 is fixed to the base 22 side. A load transmission member 63 is fixed to the bottom of the second support member 62. This load transmission member 63 faces the press-fit load support member 16 described above.

A push-up spring 65 is provided at the bottom of the illustrated work holder unit 20. This spring 6
5 pushes up the work holder unit 20 slightly, so that the work holder unit 20 can be kept separated from the support member 16. When a press-fitting load is applied by the press-fitting device 13, the load transmission member 63 contacts the support member 16.

An annular inner ring support seat 66 is provided at the upper end of the second support member 62. The diameter of the support seat 66 is set to correspond to the diameter of the inner ring 9 so that the end face of the inner ring 9 of the bearing 3 can be supported.

A hollow guide rod 68 is provided inside the second support member 62 so as to be movable up and down. This guide rod 68 is urged upward by the elastic force of a compression coil spring 69. The upper end portion 70 of the guide rod 68 is dimensioned to fit into the hole 5b of the hub 5, and furthermore, this upper end portion 70 protrudes above the support seat 66. A spring guide 71 is installed inside the spring 69.
is provided.

Next, the configuration of the press-fitting device 13 is shown in FIG.
This will be explained with reference to FIG. 9 and the like. As shown in FIG. 6, a press-fitting head 76 is provided at the lower end of the pressurizing ram 75. The pressurizing ram 75 is configured to be able to reciprocate in the vertical direction with a predetermined stroke by a reduction drive source such as a hydraulic cylinder, similar to a well-known general-purpose press machine.

The press-fitting head 76 includes a slide cam mechanism 77 to be described later, a hollow press-fitting shaft 78 extending below the pressurizing ram 75, a guide unit 79 that can be moved up and down relative to the press-fitting shaft 78, and the like. There is. An operating rod 80 passes through the center of the press-fit shaft 78.

A disk-shaped first
A pressing member 85 is provided. The outer diameter D1 of the first holding member 85 is slightly smaller than the inner diameter of the open end 2c of the housing 2.

A second pressing member 87 is fixed to the lower surface side of the first pressing member 85 with bolts 88 . The outer diameter D2 of the second holding member 87 is smaller than the inner diameter of the inner ring 9 and larger than the inner diameter of the hole 5b of the hub 5.

A seating detection plate 90 is provided on the lower surface side of the first holding member 85. The outer diameter D3 of the seating detection plate 90 is smaller than the inner diameter of the retaining ring 6 when the retaining ring 6 is in the free state. Moreover, this plate 90
The outer diameter D3 of the retaining ring 6 is larger than the inner diameter of the retaining ring 6 in the contracted state immediately before entering the groove 7. Therefore, the seating detection plate 90 can pass inside the retaining ring 6 when the retaining ring 6 is correctly inserted into the groove 7 .

The seating detection plate 90 is connected to the operating rod 8.
0, and can move up and down with respect to the holding members 85 and 87 within a stroke range of several millimeters. The operating rod 80 is driven in the vertical direction by the slide cam mechanism 77. The slide cam mechanism 77 includes a driver 92 that is horizontally movable. An inclined cam surface 93 is provided on the lower surface of the driver 92.

The cam surface 93 is located at the upper end 9 of the operating rod 80.
5 and the driver 92 is shown in FIG.
The cam surface 93 pushes down the upper end 95 of the operating rod 80 when the operating rod 80 moves from the position to the second position shown in FIG. The operating rod 80 is urged upward by a return spring 96, and returns to the initial position (first position) shown in FIG. 6 when the downward force exerted by the cam surface 93 is released.

An actuator 100 such as an air cylinder is provided at one end of the driver 92, and when the rod 101 of the actuator 100 moves toward the extension side, the driver 92 is moved to the second position. Sensors 102 and 103 for detecting the position of the driver 92 are provided on the other end side of the driver 92. 1st
The sensor 102 detects the detected portion 105 of the driver 92 when the driver 92 is in the first position. The second sensor 103 detects the detected portion 106 of the driver 92 when the driver 92 moves to the second position. Proximity switches and the like are used for these sensors 102 and 103.

The above-mentioned slide cam mechanism 77, operating rod 80, seating detection plate 90, sensors 102, 10
3 constitutes a seating confirmation mechanism 107 for determining whether or not the retaining ring 6 is accommodated in the groove 7.

As shown in FIG. 6 etc., the press-fit shaft 7
A groove 110 extending in the vertical direction is provided on the side surface of 8. A locking portion 111 is provided at the top of the groove 110. This press-fit shaft 78 holds a guide unit 79 that is movable along the groove 110 .

The guide unit 79 includes an elevating slider 115 that is movable in the axial direction of the press-fit shaft 78 along the groove 110, a grip 116 and a lock member 117 provided on the elevating slider 115, and an elevating slider 11.
5 and a retaining ring guide 121 extending in the horizontal direction.

The locking member 117 is connected to the elevating slider 115.
The lock member 1 is movable horizontally relative to the lock member 1.
When the operator 122 connected to the locking member 17 is pulled in the direction of the grip 116, the tip of the locking member 117 engages with the locking portion 11.
It is designed to deviate from 1. The distal end of the locking member 117 can be relatively movable in the vertical direction while being fitted into the groove 110.

The inner peripheral surface 125 of the guide sleeve 120 is
It is tapered so that the inner diameter gradually decreases toward the bottom. That is, the inner diameter d1 of the upper portion of the tapered inner circumferential surface 125 is larger than the outer diameter of the retaining ring 6 when the retaining ring 6 is in a free state. The inner diameter d2 of the lower end of the tapered inner circumferential surface 125 is slightly smaller than the inner diameter of the inlet of the open end 2c of the housing 2.

Next, the operation of the workpiece assembly machine 11 equipped with the workpiece support device 12 and the press-fitting device 13 configured as described above will be explained. As shown in FIG. 2, the housing 2 is set on the first support member 25 with the press-fitting head 76 of the press-fitting device 13 raised. At this time, the lift mechanism 60
By operating the rod 58 of the actuator 55 in the extension side, the rotary member 35 is rotated to the raised position shown in FIG. 4, and the first support member 25 is raised. Therefore, in this case, the stepped portion 2b of the housing 2
It is supported from below by the support seat 30 of the support member 25 . Then, the bearing 3 is placed on the open end 2c of the housing 2.

In the above state, when the locking member 117 is removed from the locking portion 111 by manually pulling the operator 122 in the direction of the grip 116, the guide unit 79 becomes in a state where it can be lowered by its own weight. When the guide unit 79 is lowered, the lower part of the guide sleeve 120 fits into the outer circumference of the outer ring 8 of the bearing 3, as shown in FIG. Then it stops.

In the state shown in FIG. 10, the retaining ring guide 1
21 and the holding members 85, 87, an opening 127 is formed which is large enough to allow the retaining ring 6 to be inserted therein. The retaining ring 6 is dropped into the guide sleeve 120 through the opening 127. Then, when the press-fitting head 76 is lowered by the pressurizing ram 75, the retaining ring 6 and the outer ring 8 are pressed down together by the first pressing member 85, the bearing 3 is press-fitted into the housing 2, and the retaining ring 6 is pressed down. It moves in the direction of entering the groove 7.

At this time, the retaining ring 6 is attached to the guide sleeve 12.
Since the retaining ring 6 is pushed down while being guided along the tapered inner circumferential surface 125 of 0, the retaining ring 6 moves toward the groove 7 while its diameter decreases. When the bearing 3 and the retaining ring 6 are press-fitted by a predetermined amount, the retaining ring 6 enters into the groove 7 as shown in FIG.
It is held in the groove 7 by expanding its diameter inside the groove.

When the above press-fitting process is completed, the actuator 100 of the seating confirmation mechanism 107 is activated, and the rod 10
1 moves toward the extension side, the driver 92 slides in the horizontal direction, and the operating rod 80 is pushed down by the cam surface 93.

At this time, if the retaining ring 6 is completely accommodated inside the groove 7, the inner diameter of the retaining ring 6 is equal to the seating detection plate 9.
Since the outer diameter is larger than the outer diameter of 0, the seating detection plate 90 can be lowered several mm to a predetermined position (a position that hits the upper end surface of the bearing 3). In that case, since the driver 92 slides to a position where it can be detected by the second sensor 103, it is confirmed that the retaining ring 6 has completely entered the groove 7 by the activation of the sensor 103.

In the unlikely event that the retaining ring 6 is not properly inserted into the groove 7, the inner diameter of the retaining ring 6 will remain smaller than the outer diameter of the seating detection plate 90, so the seating detection plate 90 will not fit into the retaining ring. 6, and the operating rod 80
the descent is prevented. In that case, the driver 92 cannot slide by a predetermined amount and is not detected by the sensor 103, so it can be known that the retaining ring 6 is not in the groove 7. In this case, the retaining ring 6 is properly fitted into the groove 7 by repeating the press-fitting operation described above.

Through the series of operations described above, the housing 2
After the bearing 3 and retaining ring 6 are properly press-fitted into the predetermined positions inside the bearing 3, as shown in FIG. Set hub 5 on top. In this case, by operating the rod 58 of the actuator 55 of the lift mechanism 60 to the contraction side, the rotating member 35 is rotated in the counterclockwise direction shown in the figure, and the opposing relationship between the cam receiver 32 and the cam 36 is shifted. As a result, the first support member 25 is lowered by a predetermined amount. In this way, the first support member 2
5, the second support member 62 is in a relatively elevated state. Therefore, the lower end surface of the inner ring 9 is supported by the support seat 66 of the second support member 62.

In the above state, by lowering the press-fitting head 76 as shown in FIG.
7 to push down the hub 5. In this case, since the lower end surface of the inner ring 9 is supported from below by the support seat 66 of the second support member 62, the press-fitting load applied by the pressing member 87 causes the shaft portion 5a of the hub 5 to
is press-fitted into the inner ring 9 of. In this way, the assembly of the workpiece 1 shown in FIG. 15 is completed.

[0048]

According to the present invention, when a bearing is press-fitted into a housing, a predetermined part of the housing can be supported by the first support member, and when a hub is press-fitted into a bearing, the lift mechanism can be By simply rotating the rotary member, it is possible to switch to a state in which the inner ring of the bearing is supported by the second support member. Therefore, the setup for the press-fitting operation is simple, and the press-fitting operation can be carried out efficiently.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a workpiece support device showing an embodiment of the present invention.

FIG. 2 is a side view of a workpiece assembly machine equipped with the workpiece support device shown in FIG. 1.

FIG. 3 is a sectional view taken along line A-A in FIG. 1.

[Fig. 4] The first part used in the workpiece support device shown in Fig. 1.
FIG. 3 is a side view showing a part of the support member and the rotating member.

FIG. 5 is a side view showing how the rotating member shown in FIG. 4 is rotated.

FIG. 6 is a longitudinal sectional view of a press-fitting device used in the work assembly machine shown in FIG. 2;

7 is a sectional view taken along line BB in FIG. 6. FIG.

FIG. 8 is a sectional view taken along line CC in FIG. 6.

9 is a sectional view taken along line DD in FIG. 6. FIG.

10 is a cross-sectional view of the work assembly machine shown in FIG. 2 in a state where the guide unit is lowered;

FIG. 11 is a sectional view showing a state in which the work assembly machine shown in FIG. 2 press-fits a bearing;

12 is a sectional view showing a state in which a retaining ring seating confirmation mechanism is activated in the work assembly machine shown in FIG. 2;

FIG. 13 is a cross-sectional view showing the hub set in the work assembly machine shown in FIG. 2;

14 is a sectional view showing a state in which the hub is press-fitted by the workpiece assembly machine shown in FIG. 2. FIG.

FIG. 15 is a sectional view showing an example of a workpiece.

16 is a plan view of a C-shaped retaining ring used for the workpiece shown in FIG. 15. FIG.

FIG. 17 is a cross-sectional view showing an exploded workpiece.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Work, 2... Housing, 3... Bearing, 5... Hub, 6... Retaining ring, 8... Outer ring, 9... Inner ring, 11... Work assembly machine, 12... Work support device, 13... Press-fit device, 21...
Base body, 22... fixed side base, 25... first support member,
30...Housing support seat, 35...Rotating member, 37...Cam means, 41...Rotation operation mechanism, 60...Lift mechanism, 62...
Second support member, 66... Inner ring support seat, 76... Press-fit head, 85, 87... Pressing member, 90... Seating detection plate, 107... Seating confirmation mechanism, 120... Guide sleeve, 1
25...Tapered inner peripheral surface.

Claims (1)

[Claims] 1. A workpiece support device for use in press-fitting the bearing and hub of a workpiece, the workpiece comprising a housing, a bearing press-fitted into the housing, and a hub press-fitted into the inner ring of the bearing. , a cylindrical base provided on a base on a fixed side; a first support member provided inside the base so as to be movable up and down and having a housing support seat capable of supporting the housing at an upper end; a rotating member that is rotatable about an axis relative to the supporting member; and a movement in a direction in which when the rotating member rotates relative to the first supporting member, the rotational force is applied to raise the first supporting member. a lift mechanism having cam means for converting the
a second support member disposed concentrically inside the first support member, fixed to the base side, and having an inner ring support seat at an upper end capable of supporting an end surface of the inner ring of the bearing; A work support device characterized by: