JPH0811332B2 - Press-fitting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a press-fitting device for press-fitting a plurality of press-fitting parts into a work from above and press-fitting another press-fitting part from below.

(Prior Art) Conventionally, from Japanese Utility Model Laid-Open No. 62-110821, there is known a press-fitting device for press-fitting a bearing inner on the upper side of a work and a ring gear on the lower side of the work. A tool pallet is movably provided on a table of a machine frame at a first press-fitting location and a second press-fitting location, and a press-fitting cylinder for a ring gear having a press-fitting head for press-fitting a ring gear above the first location; 2) A press-fitting cylinder for a bearing having a press-fitting head for press-fitting the bearing inner is provided above the press-fitting place.

(Problems to be Solved by the Invention) If the press-fitting cylinder for the ring gear and the press-fitting cylinder for the bearing are provided as in the conventional one described above, the number of the press-fitting cylinders increases and the apparatus becomes large and expensive.

In view of the above points, the present invention enables a plurality of press-fitting parts to be press-fitted into a workpiece from above at a single press-fitting place and allows another press-fitting part to be press-fitted from below, and reduces the number of press-fitting cylinders. In addition, it is possible to reduce the size of the device and reduce the cost. Furthermore, it is possible to prevent an unreasonable force from acting on the supporting means of the work due to the pressure reaction force of the press-fitting parts and to detect the press-fitting failure of the press-fitting parts. It is an object of the present invention to provide a highly reliable press-fitting device.

(Means for Solving the Problem) In order to achieve the above object, the present invention is a press-fitting device for press-fitting a plurality of press-fitting parts into a work from above and press-fitting another press-fitting part from below in a work frame. A jig table for setting the machine is provided, and a first press-fitting cylinder is erected on the upper side of the machine frame, and a work is provided in a part of the machine frame between the table and the first press-fitting cylinder. A plurality of press-fitting heads for press-fitting parts that are press-fitted from above and a pressure receiver that receives a press-fitting reaction force of another press-fitting part that is press-fitted into the work from below are provided with movable frames, respectively, The movable frame allows the press-fitting head and the reaction force receiver to be freely indexed to an operating position immediately below the first press-fitting cylinder, and further has a second press-fitting head having a press-fitting head for the another press-fitting component under the table. Cylinder And the means for detecting the press-fitting intermediate position of each press-fitting head, the means for detecting the press-fitting reaction force of each press-fitting part, and the press-fitting failure of each press-fitting part from the carry-in reaction force at the press-fitting intermediate position. And a means for discriminating.

(Operation) When press-fitting the other press-fitting parts, the reaction force receiver is indexed to the operating position by the movement of the movable frame, the pressure receiver is pushed down by the first press-fitting cylinder, and the upper part of the press-fitting head is operated by operating the second press-fitting cylinder. Another press-fitting part is dynamically pressed into the work from below, and the press-fitting reaction force at this time is received by the reaction force receiver.

When the plurality of press-fitting parts are press-fitted, the plurality of press-fitting heads are sequentially indexed to the operating positions by the movement of the movable frame, and the first press-fitting cylinder pushes down each press-fitting head to press each press-fitting part onto the work from above. Then, the press-fitting reaction force of each press-fitting component is received by another press-fitting head for another press-fitting component so that an unreasonable force does not act on the jig pallet or table.

Further, when each press-fitting head moves to a position where it is being press-fitted, the press-fitting reaction force of each press-fitting component is detected. In this case, if the tightening margin of the press-fitted part is small, the press-fitting reaction force becomes small, so that the press-fitting defect of the press-fitting part can be determined by the detected value of the pressure reaction force.

(Embodiment) The drawing shows an upper bearing inner B ₁ on the upper side of a differential gear main body A which is a work, a ring gear B _{2 in} the middle of the main body A, and a bearing inner B _{3 on the} lower side. The press-fitting device which press-fits each is shown.

In the drawings, (1) shows a machine frame, (2) shows a table of the machine frame (1) on which a jig pallet (3) for setting the differential gear body A can be fixed, and an upper part of the machine frame (1) A hydraulic press-fitting cylinder (4) is provided, and a first press-fitting press-fitting the upper bearing inner B ₁ into a portion of the machine frame (1) between the table (3) and the cylinder (4). a head (5), and a second press-fit head of press-fitting the ring gear B ₂ (6), a movable frame which supports receiving the reaction force receive a press-reaction force of the bearing inner B ₃ of the lower and (7) vertically movable (8) is provided, and the first press-fitting head (5), the second press-fitting head (6) and the reaction force receiver (7) are provided directly below the press-fitting cylinder (4) by the movement of the movable frame (8). and freely indexed to the actuated position, further a bearing inner B ₃ of the lower on the lower side of the table (2) Erected a hydraulic press-cylinder (10) having a third press fitting head which input (9).

More specifically, the table (2) is provided with a positioning pin (11a) projected by a cylinder (11), and a fixing pin (11a) conveyed by a roller conveyor (12) passing over the table (2). The tool pallet (3) can be freely positioned on the table (2) by the positioning pin (11a), and the movable frame (8) is mounted on the rail (14) of the plate (13) attached to the machine frame (1). The plate (13) is slidably supported, and an air cylinder (15) is horizontally provided on the plate (13), and a piston rod of the cylinder (15) is connected to the movable frame (8) via a stay (15a). The plate (1
3), a first stopper (16) for positioning the movable frame (8) so that the first press-fitting head (5) is located at an operating position directly below the press-fitting cylinder (4);
A second stopper (17) for positioning the movable frame (8) so that the press-fitting head (6) is located at the operating position, and the movable frame so that the reaction force receiver (7) is located at the operating position. A third stopper (18) for positioning (8) is provided, and the movable frame (8) is laterally moved by the operation of the cylinder (15), so that the first press-fitting head (5) and the second press-fitting head (6). ) And the reaction force receiver (7) can be indexed to the operating position.

The third stopper (18) is moved by an air cylinder (19) between an operating position where the stopper (18) faces the moving path of the movable frame (8) and a retracted position behind it, as clearly shown in FIG. To be done.

The first press-fitting head (5), the second press-fitting head (6), and the reaction force receiver (7) are above the support rods (5a) (6a).
In (7a), the movable support member (20) is inserted through and supported by the movable frame (8), and the fixed support members (20) on both left and right sides of the movable support member (20) attached to the machine frame (1). ) (2
1) is provided, and T-shaped grooves (20a) (21a) through which the heads of the upper ends of the support rods (5a) (6a) (7a) can be inserted into these support members (20) (21) (22). ) Is provided. Then, the movable support member (20) is attached to the piston rod (4a) of the press-fitting cylinder (4), and thus the first and second press-fitting heads (5) are indexed to the operating position by the movement of the movable frame (8).
(6) and the reaction force receiver (7) can be moved up and down through the movable support member (20) by the operation of the press-fitting cylinder (4).

A bearing holder (5b) supporting the upper bearing inner B ₁ is attached to the first press-fitting head (5) by a spring (5c).
It is installed so that it can move up against.

A load cell (22) is provided between the upper plate (20b) of the movable support member (20) and the support plate (4b) fixed to the piston rod (4a) of the press-fit cylinder (4). As clearly shown in FIG. 1, two rods (23) and (23) are erected on the plate (4b), and the first press-fitting head (5) is attached to one rod (23) at a predetermined press-fitting completion position. Dog (24a) corresponding to the first head limit switch (24) for detecting that the second press-fitting head (6) has been lowered to a predetermined press-fitting completion position. (25a) corresponding to the pressure limit switch (25) and the dog (25a) corresponding to the first head proximity switch (26) for detecting the press-fitting midway position just before the pressure completion position of the first press-fitting head (5). 26a) and just before the press-fitting completed position of the second press-fitting head (6) And a dog (27a) corresponding to the proximity switch (27) for the second head (6) for detecting the press-fitting midway position.

On the other side of both rods (23), a dog (28a) for the upper limit switch (28) that detects the contraction side stroke end of the press-fitting cylinder (4) and a lower limit switch that detects the extension side stroke end. The dog (29a) for (29) was provided.

A jig pallet (3) is attached to the third press-fitting head (9).
Provided freely down against the shaft portion to be fitted in the axial hole of the lower bearing inner B ₃ (9a) the spring (9b) being set to the press-fitting cylinder mounted on the table (2) The plate (10b) is attached to the piston rod (10a) of (10), and the third press-fitting head (9) is attached to the plate (10b).
Was fixed. Then, the plate (10b) is attached to the rod (3
0) is provided, and the rod (30) has a dog (31a) for the upper proximity switch (31) for detecting the stroke end on the extension side of the cylinder (10) and a lower side for detecting the stroke end on the contraction side. Dog (32a) for proximity switch (32)
The plate (10b) is provided with a dog (33a) corresponding to the third press-fitting head proximity switch (33) for detecting the press-fitting midway position of the third press-fitting head (9).

 Next, the operation of the embodiment will be described.

First, after positioning the jig pallet (3) on the table (2), the reaction force receiver (7) is moved to an operating position immediately below the press-fitting cylinder (4) positioned by the third stopper (18), Then, the press-fitting cylinder (4) is operated to the stroke end on the extension side to lower the pressure receiver (7) to a predetermined operating position. In this case, the reaction force receiver is set so that there is a gap of about 0.5 mm between the upper end surface of the differential gear body A on the jig pallet (3) and the lower surface of the reaction force receiver (7).

Next, by operating the press-fitting cylinder (10) to the stroke end on the extension side, the lower bearing inner B ₃ is differentially moved from the state shown by the phantom line in FIG. 4 through the third press-fitting head (9) as shown by the solid line. It is fitted into the press-fitting portion on the lower side of the gear body A.

In this case, if the tightening margin of the bearing inner B ₃ is small, the press-fitting reaction force has a small value, so the proximity switch (33) detects the press-fitting midway position of the third press-fitting head (7) and the press-fitting reaction force at that time. Is measured via the load cell (22), the defective press-fitting of the bearing inner B ₃ can be seen.

Receiving the reaction force after the press-fitting completion of the lower bearing inner B ₃ (7) is raised by the operation of the pressure cylinder (4), by moving the third Sutoppaa (18) to the departure position cylinder (1
5) is operated to the extension side, and the first press-fitting head (5) is moved to the operating position immediately below the press-fitting cylinder (4) positioned by the first stopper (16). Then, with the third press-fitting head (9) raised to a predetermined operating position, the press-fitting cylinder (4) is actuated toward the extension side, whereby the third press-fitting head (9) receives a reaction force and becomes the fifth force. As shown in FIG. 5b from the state shown in FIG. A, the upper bearing inner B ₁ supported by the bearing holder (5b) of the press-fitting head (5) is fitted into the differential gear body A.

In this case, the proximity switch (26) is slid to detect the press-fitting midway position of the first press-fitting head (5) and the press-fitting reaction force at that time is measured via the load cell (22). The press-fitting failure of the inner B ₁ can be seen.

Next, the first press-fitting head (5) is raised, the cylinder (15) is operated toward the contraction side, and the second press-fitting head (6) is moved to the second position.
It moves to the operating position which is positioned by the stopper (17). Then, the third press-fitting head (9) is raised to a predetermined operating position, and the press-fitting cylinder (4) is actuated to the extension side, whereby the third press-fitting head (9) receives a reaction force and the sixth force is applied. A ring gear that is preset in the differential gear body A from the state shown by the phantom line in the figure to the solid line
B ₂ is inserted through the second press-fitting head (6).

In this case, the press-reaction force at that time by measuring through a load cell (22) detects the press-fitting the middle position of the second press-fitting head by proximity switch (27) (6), in the same manner as described above the ring gear B ₂ It can be seen that the press-fitting is bad.

After the press-fitting of the ring gear B ₂ is completed, the second press-fitting head (6) is raised, the third press-fitting head (9) is lowered, and the jig pallet (3) is dispensed to complete one cycle.

As in the embodiment, the lower third press-fitting head (9) is used to receive the reaction force when the upper bearing inner B ₁ and ring gear B ₂ are press-fitted, and the jig pallet (3) and Even if the work is done without applying unreasonable force to the roller conveyor (12) and its lower surface a is not finished like the differential gear body A, the upper bearing inner B ₁ and ring gear B ₂ are misaligned. This is advantageous because it can be securely press-fitted without causing

(Effect of the invention) As described above, according to the present invention, it is possible to press-fit a plurality of press-fitting parts from above and another press-fitting part from below at a single press-fitting place, and also press-fitting a plurality of press-fitting parts above. Can be performed by one press-fitting cylinder in common, and the size and cost of the press-fitting device can be reduced. Also, the press-fitting head for another press-fitting part that is press-fitted from below can also be used as a reaction force receiving force when press-fitting an upper press-fitting component, and it is possible to use a separate reaction force receiving force that acts on the jig pallet or table. It can be prevented without using, and the structure becomes simple. Further, a press-fitting defect due to insufficient tightening of the press-fitting component can be determined by detecting the press-fitting reaction force at the mid-pressing position, and the reliability of the device is improved.

[Brief description of drawings]

FIG. 1 is a front view showing an example of the apparatus of the present invention, FIG. 2 is a side view taken along line II-II of FIG. 3, FIG. 3 is a side view taken along line III-III of FIG. 1, and FIG. FIG. 5a and FIG. 5b are side views of the bottom end of the main part showing the press-fitting operation of the upper bearing inner, and FIG. 6 is the press-fitting state of the ring gear. FIG. 3 is a cutaway side view of a main part showing FIG. (1) …… Machine frame (2) …… Table (3) …… Jig pallet (4) …… Press fit cylinder (5) …… First press fit head (press fit head) (6) …… Second press fit head (Press-fit head) (8) …… Movable frame A …… Differential gear body (workpiece) B ₁ …… Bearing inner (press-fit parts) B ₂ …… Ring gear (press-fit parts)

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takashi Ichizawa 1-10-1 Shin-Sayama, Sayama City, Saitama Prefecture Within Honda Engineering Co., Ltd. (56) References JP 62-102927 (JP, A)

Claims (1)

[Claims] 1. A press-fitting device for press-fitting a plurality of press-fitting parts into a work from above and press-fitting another press-fitting part from below, while providing a table on which a jig table for setting a work can be set in a machine frame, No. 1 on the upper side of the machine casing
A pressure cylinder is erected, and a plurality of press-fitting heads for a plurality of press-fitting parts that are press-fitted into the work from above and a press-fitted bottom of the work in the part of the machine frame between the table and the first press-fit cylinder. A movable frame is provided for vertically movably supporting another press-fitting component and a reaction force receiver for receiving a press-fitting reaction force, and the movement of the movable frame causes the press-fitting head and the pressure receiver to operate directly below the first press-fitting cylinder. A second press-fitting cylinder having a press-fitting head for the other press-fitting component provided below the table, and means for detecting a press-fitting intermediate position of each press-fitting head; A press-fitting device comprising means for detecting a press-fitting reaction force of each press-fitting component and means for discriminating a press-fitting failure of each press-fitting component from a press-fitting reaction force at an intermediate press-fitting position.