JPS5936727Y2 - Oil-less metal for high temperature parts - Google Patents

Description

[Detailed description of the invention] This invention is applicable to equipment installed in high-temperature locations, especially filling and packaging equipment that encloses the required materials in synthetic resin bags where the use of oil bearings is inappropriate due to high temperatures and hygiene reasons. As shown in the drawing, a cylindrical main body 1 made of gunmetal or the like has an inner circumferential surface 2 with a recess having a truncated circular cross section extending parallel to the axis from one mouth edge. Groove 3...
. . . are bored in large numbers with each occluded portion serving as the opening surface 4, with the tip of each aperture slightly inward from the rim of the other, and at the same time, a plurality of grooves are cut across the tips of the concave grooves 3. A rod-shaped rod 6 with an truncated circular cross section is formed by forming a wear powder storage groove 5 slightly deeper than the concave groove 3 into an annular shape and solidifying monobutyne disulfide powder.
. . are inserted into the grooves 3 with their tips protruding from one mouth edge into the wear debris storage grooves 5, and then inserted into both ends of the grooves 3. A shallow cleaning groove 7 is annularly recessed in the inner circumferential surface 2 of the cylindrical main body 1 across the groove 3 and the rod body 6 at a predetermined position between them. The cylindrical main body 1 is provided with a fluid injection hole 8 having one end communicating with the cleaning groove 7 and the other end communicating with the outer peripheral surface of the cylindrical main body 1.

Note that 9 is a mounting screw hole for mounting the cylindrical main body 1 to the metal cover, and 10 is a spring receiver.

Conventionally, this type of oil-less metal has a cylindrical main body with grooves extending from one edge to the other edge, and rods that are solid lubricants are inserted into these grooves. Since both ends of the groove are open on both sides of the main body,
When the rod is worn out or pulled out, the exposed grooves cause the main body mouth edge to become uneven, damaging the shaft circumferential surface, and also causing the rod to be separated in the grooves.

That is, since the rod, which is the solid lubricant, has a larger difference in temperature expansion than the main body, it is likely to be pulled out or partially damaged due to expansion.

This invention eliminates the above-mentioned drawbacks, and as mentioned above, the tips of the concave grooves 3 do not pass through the other mouth edge of the cylindrical main body 1, so they support both ends of the rotating shaft. When used as a bearing, the surfaces that contact the other mouth edge face each other inward, and a blind cover is attached to the outside, that is, one lip, so that the rod 6, which is a lubricant, is In order to completely prevent the rod from being pulled out, and to insert the rod 6 into the groove 3, it is sufficient to simply drive it from one side. When cutting and finishing, it is possible to accurately cut and finish using the other mouth edge, that is, the inner circumferential surface of the mouth edge on the side that has not come out, as a centering reference plane. Furthermore, in this invention, the inner circumferential surface of the cylindrical main body 2 is provided with a shallow cleaning groove 7 and a deep abrasion powder storage groove 5, and a fluid injection hole 8 is provided, one end of which communicates with the cleaning groove 7 and the other end of which communicates with the outer peripheral surface of the cylindrical main body 1. Accordingly, a cleaning fluid such as a lubricant or pressurized air can be injected into the cleaning groove 7 at any time during use to wash away abrasion powder and dust mixed in from the outside.

In this case, since the abrasion powder storage groove 5 is a deep groove, the abrasion powder that has flowed into this groove adheres to the bottom of the groove due to centrifugal force, and then travels along the circumferential surface to the back side of each rod 6. There is no fear that all the particles will flow down through the shaft and be deposited and redispersed on the inner surface of the bearing.

In addition, each rod 6 is fitted into the tip with a slight gap as shown in the figure in consideration of temperature expansion, but the tip protrudes in a cantilevered manner into the wear powder storage groove 5. Therefore, there are many advantages such as a large cooling effect on each rod 6.

[Brief explanation of the drawing]

Figure 1 is a plan view, Figure 2 is a front view, Figure 3 is A of Figure 2.
- It is a side sectional view at the A position. 1...Main body, 2...Inner peripheral surface, 3...
... Concave groove, 4 ... Opening surface, 5 ... Wear powder storage groove, 6 ... Rod body, 7 ... Cleaning groove, 8 ... ...Fluid injection hole.

Claims (1)

[Scope of utility model registration request] On the inner peripheral surface 2 of the cylindrical main body 1, a concave groove 3 with a circular cross section extending parallel to the axis from one edge of the main body 1 is formed, with each circular portion serving as the opening surface 4. A number of holes are made with the tip slightly inward from the rim of the other mouth, and grooves 3...
Abrasion powder storage grooves 5 slightly deeper than the grooves 3 are formed in an annular shape across the tips of the grooves 3, and molybutyn disulfide powder is solidified in the grooves 3. A rod body 6 having a circular cross-section with a circular cross section is tightly fitted into the groove 3 with each tip thereof protruding into the groove 3.
The concave groove 3 is provided at a required position between both ends of .
A shallow cleaning groove 7 is annularly recessed in the inner circumferential surface 2 of the cylindrical main body 1 across the rod 6... An oil-less metal for a high temperature section, in which a fluid injection hole 8 is bored in a cleaning groove 7, the other end of which communicates with the outer peripheral surface of the cylindrical main body 1.