JPS6032432Y2 - bearing device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a bearing device used, for example, to reduce sliding resistance on a flat sliding surface.

This bearing device is used, for example, when a large number of bearing devices are installed on a bolster of a press machine and a mold mounted on the bolster is smoothly replaced.

Among the molds of a press machine, the lower mold is fixed on a bolster, but when replacing the mold, it is slid horizontally (or vertically, whichever is a fixed direction) on the surface of the bolster. There is a need.

It is necessary to reduce the sliding resistance during this work.

Conventionally, there have been bearing devices for this type of purpose, such as the one shown in FIG.

This bearing device includes a cylindrical casing 60 having an inner hole 62 and a bottom 63, and an inner hole 6 of this casing 60.
2 has a hemispherical recess 61 at the upper end and is inserted with a gap from the bottom 63, and the ball receiver 64 is constantly pressed upward between the ball receiver 64 and the bottom 63. A spring 65 is provided, a ball 67 is placed in the recess 61 of the ball receiver 64 via a plurality of small balls 66, and the ball 67 is locked with a stopper lid 68 so that a part of the ball 67 protrudes upward. The structure is as follows.

In order to attach a bearing device having such a configuration to the bolster 1, an inner hole 69 equal to the outer diameter of the casing 60 is provided in the bolster 1, and the surface 7 of the bolster 1 is inserted into the inner hole 69.
0, the tip of the reball 67 may protrude.

When the bolster 1 is provided with a plurality of bearing devices, the lower mold placed on the surface 70 of the bolster 1 is supported by the balls 67 of the plurality of bearing devices.

Then, when the lower mold is moved, the lower surface of the lower mold and the ball 6
The ball 67 rotates due to contact with the mold 7, and the mold can be moved smoothly.

The bearing device having the above-mentioned structural action has a bolster 1
The ball 67 has a function of allowing the lower mold to move smoothly on the surface of the bolster 1, but the tip of the ball 67 always protrudes from the surface 70 of the bolster 1.

Therefore, when the lower mold is moved to a predetermined position and set at that position (the lower mold is fixed to the surface 70 of the bolster 1).

) must be fixed against the pressing force of the bearing device, which may cause the position to shift during setting, or require extra setting force against the pressing force of the bearing device.

In view of the above-mentioned problems, this invention places the lower mold on top of the bolster, makes the roller protrude from the surface of the bolster only when the lower mold needs to be moved, and in other situations, the roller is placed on the bolster. To provide a bearing device capable of smoothly moving and accurately fixing a lower mold by lowering a roller from the surface of the mold.

Hereinafter, FIGS. 1 and 2 showing an embodiment of this invention will be described.

A plurality of (the plurality is not shown in the figure) provided on the bolster 1.

) The inner hole 2 is composed of a small-diameter inner hole 4 into which a cylinder tube (to be described later) is inserted, and a large-diameter inner hole 3 connected to the inner hole 4 and into which a flange is inserted with a gap. The small diameter inner hole 4 has a passage 5 connected to a pressure oil source (not shown).
It opens at its bottom 6.

The cylinder device 9 is fitted into the small-diameter inner hole 4 and fixed by the flange 7 fixed by the inner bolt 8 of the large-diameter inner hole 3, and is a cylinder having a large-diameter inner hole 10 and a small-diameter inner hole 11. A tube 12, a piston part 13 that is slidably fitted into the large-diameter inner hole 10 of the cylinder tube 12, and a rond part 15 that is slidably fitted into the small-diameter inner hole 11 and has a roller 4 on the top thereof. It has a piston part 16 consisting of.

The flange 7 is fixed to the bolster 1 with bolts 8 (a plurality of bolts), and has a hole 17 into which the small diameter portion 16 at the upper end of the cylinder tube 12 is fitted.
A protrusion 19 that fits into the small diameter inner hole 2 and comes into contact with the step 18 of the cylinder tube 23 is provided around the periphery of the cylinder tube 23 .

The projection of the flange 7 adjusts the overall position of the cylinder tube 12 by adjusting the height h of the inner hole 2 from the bottom 80 of the large-diameter inner hole 3 .

Therefore, errors in machining the inner hole 2 provided in the bolster 1 are absorbed.

This allows the height of the plurality of bearing devices provided on the bolster 1 to be targeted.

The cylinder tube 12 has a hole 1 of the flange 7 in its upper part.
7 and a large diameter portion 21 that fits into the small diameter inner hole 4 of the inner hole 2, the lower end 22 of which forms a gap with the bottom 6 of the inner hole 2.

The piston portion 13 of the rond portion 15 is slidably fitted into the large diameter inner hole 10 provided in the large diameter portion 21 of the cylinder tube 12. The lower end 22 of the diameter portion 21 and the lower part of the inner hole 2 form a hydraulic chamber 23 .

This hydraulic chamber 23 is connected to a hydraulic power source via a passage 5 and a switching valve (not shown).

When pressure oil is supplied to the hydraulic chamber 23 by operating the switching valve, the piston portion 13 and the cylinder tube 12 are pressed upward.

At this time, the cylinder tube 12 stops at a position where the protrusion 19 of the flange 7 and the step 18 come into contact.

Moreover, the piston part 16 also moves upward due to the hydraulic pressure acting on the piston part 13, but this movement is caused by a step provided at the point where the large diameter inner hole 10 and the small diameter inner hole 11 of the cylinder tube 12 are connected. The upper surface 25 of the piston portion 13 is moved upward to a position where the upper surface 25 of the piston portion 13 comes into contact with the portion 24 .

The piston part 16 has a piston 13 slidably fitted into the large diameter inner hole 10 of the cylinder tube 12 at its lower part;
It has a configuration including a rond part 15 that holds a roller 14 at the upper end.

The piston part 16 has a hole 27 in its middle part, as shown in FIG. It is fixed to the tube 12.

The size of the hole 27 is determined by the movement of the piston portion 16 upward.
The size is such that the hole 27 and the pin 28 do not come into contact with each other even when the stepped portion 24 of the cylinder tube 12 and the upper surface 25 of the piston 13 come into contact with each other.

Further, the inner hole 29 provided inside the piston portion 16 is for tensioning a spring 30 between the bottom portion 31 and the pin 28, and this spring 30 is used when the hydraulic chamber 23 is connected to the tank. , has a tension force that causes the piston portion 16 to move downward as a whole.

The roller 14 has a width that is almost the same as the width of a groove 32 provided at the upper end of the piston part 16, and a shaft 33 fixed to this groove 32.
Rotatably held by.

That is, the roller 14 is attached via a shaft 33 and a knee bearing 34, and is rotatable in the direction of arrow A (both left and right directions).

The roller 14 is located at a position lower than the surface 70 of the bolster 1 when the piston section 16 is in the lowered position, and when the piston section 16 is at its highest position, it is located at a position indicated by the chain double-dashed line.
As shown in FIG. 4a (FIG. 2), the upper end thereof is positioned so as to protrude from the surface 70 of the bolster 1.

The direction of this roller 14 is such that the attachment of the flange 7 is oriented depending on the direction.

That is, the cylinder tube 12 and the flange 7 are integrated by the pin 35 so as not to rotate relative to each other (but are movable in the vertical direction), and the cylinder tube 12 and the piston portion 16 are oriented by the pin 28. ing.

Therefore, once the fixing direction of the flange 7 is determined, the roller 1
The direction of 4 is also determined.

In order to install the bearing device having the above configuration on the bolster 1, first, the necessary number of inner holes 2 are machined in the bolster 1, and then the cylinder device 9, which has been assembled in advance, is machined.
is inserted into the machined inner hole 2, and the flange 7 and the bolster 1 are fixed with the port 8.

In this state, a hydraulic chamber 23 is formed in the lower part of the inner hole 2 of the bolster 1.

Next, when pressurized oil is supplied to the hydraulic chamber 23, the cylinder tube 12 and the piston part 16 rise, but the cylinder tube 12 has a stepped part 18 and a projection part 19 of the flange 7.
The piston part 16 stops at the position where the cylinder tube 12 and the upper surface 25 of the piston 13 come into contact with each other.
It will stop at the position where it touches.

At this time, the roller 14 is in a position protruding from the surface 70 of the bolster 1, as shown by a two-dot chain line 14a.

The amount of protrusion of this roller 14 varies depending on the machining error of the inner hole 2 of the bolster 1 (depending on the depth h2 of the large diameter inner hole 3 of the inner hole 2).

This difference can be made uniform by adjusting the height of the protrusion 19 of the flange 7.

In this way, the roller 14 is lowered from the surface 70 of the bolster 1.
The installation of the bearing device is completed by adjusting the protrusion amount so that it is uniform.

Next, the case of attaching or detaching the lower mold to the bolster 1 will be described.

First, when attaching the lower mold to the bolster 1, first supply pressure oil to the hydraulic chamber 23 so that the tip of the roller 14 is
When the lower mold is moved after it is projected to the position shown by the dotted chain line 14a, the lower mold is supported by the lower surface of the lower mold and the roller 14, so that it moves with extremely light sliding resistance.

Next, the lower mold is moved to a predetermined position and the hydraulic chamber 23 is connected to the tank.
It stops at a position below the surface 70 of.

When this lower mold comes into contact with the surface 70 of the bolster 1, the rollers 14 are lowered uniformly, so that the lower mold can be lowered onto the surface 70 of the bolster 1 very accurately.

Next, when removing the lower mold fixed to the surface 70 of the bolster 1 as described above, when the switching valve is operated to supply pressure oil from the passage 5 to the hydraulic chamber 23, the piston part 16 The weight of the lower mold and the spring 3 are
It rises against 0.

At this time, the piston portion 16 of the bearing device, which is provided at a location other than under the lower mold, has similarly risen to a position where the upper surface 25 of the piston 13 and the stepped portion 24 come into contact.

If the hydraulic pressure in the hydraulic chamber 23 is maintained in this state, the roller 1
4 protrudes from the surface 70 of the bolster 1, the lower mold is supported by the rollers 14 and moves with extremely light sliding resistance.

As mentioned above, the bearing device according to this invention is
Since the roller is moved up and down by a hydraulically operated piston and an upper and lower cylinder device, the force pressing the roller 14 can be made uniform, and the lower mold can be moved to a predetermined position on the surface of the bolster. The sliding resistance for movement is extremely light, and after moving to a predetermined position, the lower mold can be positioned extremely accurately by simply operating the switching valve.

Also, since the rollers are below the surface of the bolster except when needed, the surface of the bolster is available for normal use.

As described above, the lower mold replacement work can be carried out extremely efficiently.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of this invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view of a conventional bearing device. 1... Bolster, 2... Inner hole, 3...
...Large diameter inner hole, 4...Small diameter inner hole, 5.
...Aisle, 6...Bottom, 7...
Flange, 8... Bolt, 9... Cylinder device.

Claims (1)

[Scope of utility model registration request] a cylinder tube that fits into an inner hole provided in a bolster and has a large diameter inner hole and a small diameter inner hole; a large diameter piston that fits slidably into the large diameter inner hole of the cylinder tube; a piston body having a small diameter rod portion provided with a roller 14 at the upper end and slidably fitted into a small diameter inner hole of the cylinder tube; the piston body and the cylinder tube fixing the piston body to the penetrating cylinder tube; A spring is inserted between the pin and the piston body to constantly press the piston downward, and an inner hole between the large diameter piston and the bolster of the piston body is used. A bearing device in which a hydraulic chamber is formed between the cylinder tube and the cylinder tube, and the cylinder tube is fixed in the inner hole of the bolster by a flange.