JPH0711865Y2 - Pressed material decomposer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a press-fitting and disassembling device for disassembling a press-fitting object such as a cap which is press-fitted into a crankshaft bearing portion of an engine and tightened by a plurality of bolts. Regarding

[Conventional technology]

Conventionally, for example, when disassembling a metal cap of a crankshaft bearing portion of an engine, a plurality of bolts fastening the press-fitted cap are removed using a nut runner, and a reaction force when pulling out the press-fitted cap ( For example, in order to receive 500kg), the engine block is strongly pushed down, and then the cap is slowly pulled out without tilting.

[Problems to be solved by the invention]

However, in such a conventional press-fitting material decomposing means,
There is a problem that it is necessary to hold down the cylinder block as the press-fitted object with an external force necessary to overcome the reaction force generated when the press-fitting cap is pulled out, and it is difficult to pull out the cap while not tilting it.

The present invention is intended to solve such a problem, and when pulling out a press-fitted object, it is not necessary to hold down the press-fitted object with a large force, and the press-fitted object can be pulled out without being tilted. It is an object of the present invention to provide a press fit material decomposing device.

[Means for solving problems]

Therefore, the press-fitting material disassembling device of the present invention engages with the heads of the bolts of the press-fitting material that has been press-fitted and tightened with a plurality of bolts to perform tightening and loosening operations of the bolts. The nut runner socket is equipped with a synchronizing mechanism to operate these nut runner sockets in synchronism. It is characterized in that an engaging member that is provided and that can engage with the press-fitted object is provided.

[Action]

In the press-fitting material disassembling apparatus of the present invention described above, when disassembling the press-fitting material, first, each nut runner socket is engaged with each bolt head of the press-fitting material, and then the nut runner socket is loosened in synchronization with the synchronizing mechanism. To perform. At this time, if the engaging member is engaged with the press-fitted object, the bolt is loosened as the nut runner socket is loosened, but the reaction force generated at this time causes the engagement member to pull out the press-fitted object. As a result, the press-fitted product is pulled out and disassembled without tilting.

〔Example〕

Hereinafter, a press-fitted material disassembling apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram thereof, FIG. 2 is an operation explanatory diagram of its engaging member, and FIG. FIGS. 4A to 4D are schematic perspective views showing the relationship with the mating member, and FIGS. 4A to 4D are schematic views for explaining the cap disassembling process.

As shown in FIG. 1, in this device, a nut runner 4 is supported by a device main body 8, and this nut runner 4 has two nut runner parts 5 and each nut runner part 5
A nut runner socket 7 is attached to the lower end of the. Each nut runner socket 7 is engaged with the head 3a of the bolt 3 in the cap (metal cap) 2 as a press-fit object that is press-fitted into the crankshaft bearing portion of the cylinder block 1 of the engine and then tightened with the two bolts 3. Together, they perform tightening and loosening operations.

Further, a synchronization mechanism SY for synchronously operating these nutrunner sockets 7 is provided. That is, a forward / reverse rotatable air motor 6 is provided, a gear 9 is attached to the lower end of the rotation shaft of the air motor 6, and the gear 9 meshes with the input gear 10 of each nut runner portion 5. . In addition, in FIG. 1, the nut runner portion 5 on the right side is shown.
Only the meshing part with the input gear 10 of FIG.

Since the nut runner portions 5 have the same structure, the structure of one nut runner portion 5 (the one drawn on the right side in FIG. 1) will be described. That is, the nut runner portion 5 has a tubular member 11 having an input gear 10, and a shaft member 14 is coaxially connected to the tubular member 11 via a friction clutch 12 and a one-way clutch 13. Here, the one-way clutch 13 is the bolt 3
It is configured so that the force is transmitted when the tubular member 11 is rotated in a direction for loosening the bolt (for example, rightward rotation direction), but the force is not transmitted when the tubular member 11 is rotated for tightening the bolt 3 (for example, leftward rotation direction). ing.

Further, the shaft member 14 has a tubular shape, and is connected to the socket hole 15 at the lower end of the shaft member 14 via a corner spline portion 16. The socket shaft 15 penetrates the mounting bracket 29, and the nut runner socket 7 is mounted on the lower end portion of the socket shaft 15 below the mounting bracket 29.

In addition, the ball 18 is attached to the upper end of the socket shaft 15 through the rod 18.
Is provided so as to penetrate the shaft member 14, and two dogs 19 indicating the height position of the nut runner socket 7 are provided at the upper end portion of the rod 18, and the dogs 19 are provided in the vicinity of these dogs 19. A proximity switch 20 is provided.

In addition, the bearings 21 to
23 is provided, and springs 24 to 26 and flat springs are in place.
27 is loaded.

Further, a long hole 15a is formed in the socket shaft 15, and a pin 28 with a shaft member 14 is fitted and inserted in the long hole 15a.

By the way, the mounting bracket 29, as shown in FIGS.
Two claw members (engaging members) 30 that can be engaged with the metal mounting portion of the cap 2 are pivotally mounted. And each claw member 30
Are configured to open each other by a spring (not shown) (see the state of the claw member 30 on the left side in FIG. 2).
A rod 31 for urging the respective claw members 30 from the outside of each other so as to close each other (see the state of the claw members 30 on the right side in FIG. 2) is pivotally attached at one end to a mounting bracket 29. The end is also attached to a piston rod 33 of a cylinder 32 with a mounting bracket 29.

A guide groove 34a is formed in the vertical direction on the outer wall portion of the tubular member 34 interposed between the springs 24, 25, and the projection 35 with the device body 8 is engaged with the guide groove 34a. ing. As a result, it is possible to prevent the posture of the tubular member 34, and thus the nut runner portion 5, from being shaken.

Next, the operation will be described. First, the cap 2 is press-fitted into the crankshaft bearing portion of the cylinder block 1 for simultaneous drilling and then fastened with two bolts 3. Then, after the drilling is completed, the cap 2 is pulled out and disassembled in order to assemble the crankshaft. For this purpose, the device is used.

First, as shown in FIG. 4 (a), it is confirmed that both nut runner sockets 7 are completely set by turning the nut runner sockets 7 in the direction in which the bolts 3 are tightened.
That is, by rotating the nut runner 4 counterclockwise, the gears 9,
Friction clutch pressed by Sarabane 27 via 10.
The shaft member 4 is rotated by 12. At this time, the one-way clutch 13 is idling.

Rotation is transmitted between the shaft member 14 and the socket shaft 15 by the angular spline portion 16, but the shaft member 14 and the socket shaft 15 are connected so as to be slidable in the axial direction, and the mounting bracket 29 is held in a fixed position by the springs 24 and 25.
Since the shaft is prevented from coming off by the spring with the pin 28,
The rotation of the nut runner 4 causes the socket shaft 15 to rotate clockwise. When the nut runner socket 7 at the tip of the socket shaft 15 is securely set on the head 3a of the bolt 3 in this manner, the rod 18 moves up and down and the proximity switch 20 moves from the movement of the dog 19.
Causes a set signal to be issued.

If only one of the two shafts is set, the one that has been set does not rotate, the friction clutch 12 slips, and both shafts (nut runner socket 7) rotate until they are also set. At this time, the claw member 30 is in a closed state (see the right claw member 30 in FIG. 2) by operating the cylinder 32.

Then, when both nut runner sockets 7 are set on the head 3a, both nut runner sockets 7 are simultaneously turned in the opposite direction while being synchronized, and the bolt 3 is loosened. That is, when the nut runner 4 is rotated clockwise, the one-way clutch 13 is connected and the shaft member 14 and the socket shaft 15 are rotated counterclockwise to loosen the bolt 3.

When the bolt 3 begins to loosen in this way, as shown in FIG. 4 (b), the bolt 3 comes out and the nut runner socket 7 is also pushed up. This allows the claw member
When there is no gap between 30 and cap 2, Fig. 4 (c)
As shown in FIG. 3, the cap 2 that is press-fitted through the claw member 30 is pulled out by using the reaction force of the bolt 3.

That is, when the bolt 3 is loosened, the cap 2 is pulled out by the pawl member 30 by using the force of the bolt 3 coming out.

Further, since the socket shaft 15 rotates in synchronization with the one-way clutch 13, the cap 2 is pulled up in parallel. In this way, the bolt 3 is completely loosened, and the cap 2 is completely removed from the cylinder block 1 as shown in FIG. 4 (d). After that, the piston rod 33 of the cylinder 32 is pulled upward to open the pawl member 30 (see the state of the pawl member 30 on the left side in FIG. 2), and then the cap 2 is removed. This completes the disassembly work.

In this way, rotate the nut runner socket 7 once and
Set the nut runner socket 7 on the bolt 3 of the book,
Since both nut runner sockets 7 are rotated in synchronism when loosened thereafter, the claw member 30 can be prevented from falling, and the inclination at the time of pulling out the cap 2 in the press-fitting margin can be reduced.
The reaction force applied to the parts can be made constant, and the distortion of the parts can be reduced.

Also, when pulling out the press-fitted cap 2, the bolt 3
It is not necessary to clamp the cylinder block 1 by using the reaction force generated by the screw portion.

In the case of a multi-cylinder engine, since a plurality of caps 2 are provided, a number of nut runners 4 corresponding to the number of caps are prepared, and preferably all the nut runners 4 are operated synchronously.

Although the metal cap press-fitted into the crankshaft bearing portion has been described as an example of the press-fitted product tightened with a plurality of bolts, it goes without saying that the press-fitted product is not limited to the metal cap.

[Effect of device]

As described in detail above, according to the press-fitting object disassembling apparatus of the present invention, the heads of the above-mentioned bolts in the press-fitted material that has been press-fitted and tightened with a plurality of bolts are engaged to tighten the bolts. ， Provides a plurality of nutrunner sockets for loosening operation, and is equipped with a synchronization mechanism to operate these nutrunner sockets in synchronization. Therefore, with a simple configuration in which an engaging member that is provided on the nut runner side and that can engage with the press-fitted article is provided, it is not necessary to press the press-fitted article with a large force when pulling out the press-fitted article, There is an advantage that the press-fitted product can be pulled out without being tilted.

[Brief description of drawings]

1 to 4 show a press-fitting material disassembling apparatus as an embodiment of the present invention. FIG. 1 is an overall configuration diagram thereof, FIG. 2 is an operation explanatory diagram of its engaging member, and FIG. FIG. 4A is a schematic perspective view showing the relationship between the nut runner and the engaging member.
(D) is a schematic diagram for explaining each cap disassembly process. 1 ... Cylinder block, 2 ... Cap (press-fitting object),
3 ... Bolt, 3a ... Bolt head, 4 ... Nut runner, 5 ... Nut runner part, 6 ... Air motor, 7 ...
Nut runner socket, 8 ... Device body, 9, 10 ... Gear, 11 ... Cylindrical member, 12 ... Friction clutch, 13 ... One-way clutch, 14 ... Shaft member, 15 ... Socket shaft, 16
…… Square spline part, 17 …… Ball, 18 …… Rod, 19
…… Dog, 20 …… Proximity switch, 21-23 …… Bearing, 24-26 …… Spring, 27 …… Sarabane, 28 …… Pin, 29
…… Mounting bracket, 30 …… Claw member (engaging member), 31 …… Rod, 32 …… Cylinder, 33 …… Piston rod, 34 …… Cylinder member, 34 a …… Guide groove, 35 …… Protrusion, SY ...... Synchronization mechanism.

Claims (1)

[Scope of utility model registration request] 1. A plurality of nut runner sockets which engage with the heads of the above bolts in a press-fitted object which has been press-fitted and tightened with a plurality of bolts to perform tightening and loosening operations of the bolts. Is provided on the nut runner side in order to pull out and disassemble the press-fitted material by the reaction force generated when the bolt is loosened by the nutrunner socket. An apparatus for decomposing a press-fit object, characterized in that an engaging member capable of engaging is provided.