JPS62414Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sleeve for fitting and fixing a shaft or other fitting member into a hole provided in a part, frame, etc. of various instruments and machines.

Conventionally, this type of sleeve has been known to have a sleeve made of a thin steel plate of a constant width with both ends butted against each other, and a continuous protrusion in the axial direction formed on the outer or inner circumferential surface of the sleeve. However, in this conventional device, as shown in FIG. 7, the continuous protrusion 21 formed on the circumferential surface of the cannula 20 has a top portion 22 formed flat in a straight line. As shown in FIG.
5 is press-fitted, both ends 2 of the continuous protrusion 21
6, 26' are strongly pressed by the hole 24, and the middle part tends to be slightly curved inward, and the middle part of the continuous protrusion part 21 does not come into close contact with the hole 24, which weakens the degree of bonding. be.

The present invention has been devised to overcome the drawbacks of the conventional sleeves of this type as described above.

An example of the implementation of the present invention will be described in detail with reference to the drawings. A sleeve tube 3 is formed of a thin steel plate having a constant width and having both ends 2 and 2' abutted against each other with a constant gap 1.

On the outer surface side or the inner surface side of the peripheral wall surface 4 of the sleeve 3, axially extending protrusions 5 are continuously extruded at equal intervals, and the protrusions 5 are formed in the middle. It is formed into a gently arched shape 7 that is slightly higher (approximately 0.2 mm) than the shoulder portions 6 and 6' at both ends.

In the present invention, as described above, the middle of the protrusion 5 formed on the peripheral wall surface 4 of the sleeve 3 is formed into a gentle arc shape 7 that is slightly higher than the shoulders 6 and 6' at both ends of the protrusion 5. For example, as shown in FIG. 6, a protrusion 5 formed by pressing out on the outer surface of the peripheral wall surface 4 of the sleeve 3 is inserted between the hole 9 of the fitted body 8 and the shaft 10 to be press-fitted. When interposed between the ribs 5 and 5, the intermediate portion formed in the shape of a gentle arc 7 that is slightly higher than the shoulder portions 6 and 6' at both ends of the protrusion 5 is strongly pressurized to the inner surface of the hole 9, and the entire top surface of the protrusion 5 is A shaft 10 that is closely crimped to the inner surface of the hole 9 and has a protrusion 5 pressed out on the inner surface of the peripheral wall surface 4 of the sleeve 3 is interposed between the hole 9 of the fitted body 8 and the shaft 10 to be press-fitted. In this case (not shown), the entire top of the protruding portion 5 is tightly pressed against the circumferential surface of the shaft 10.

In short, the present invention uses thin steel plates of a constant width with a gap of 1.
A cannula 3 with both ends 2 and 2' abutted against each other with
, and in which protrusions 5 in the axial direction are continuously extruded at equal intervals on the peripheral wall surface 4 of the sleeve 3, the middle of the protrusions 5 is connected to shoulder portions at both ends of the protrusions 5. 6, 6' is formed into a loose arc shape 7, so that when the sleeve 3 is interposed between the hole 9 of the fitted body 8 and the press-fitted shaft 10 or other fitting member, the protrusion The middle of the protrusion 5, which is slightly higher than the shoulder parts 6 and 6' at both ends of the protrusion 5, is formed into a loose arc shape 7, and the middle part of the protrusion 5 conforms to the hole 9 of the body 8 to be fitted, or the surface of the shaft 10 or other fitting member under strong pressure. However, the entire top surface of the protrusion 5 is tightly and strongly bonded to the inner surface of the hole 9 or the circumferential surface of the shaft 10 or other fitting member, thus eliminating the drawbacks of conventional sleeves of this type, and improving the sleeve 3. Through this, the body 8 to be fitted and the shaft 10 and other fitting members can be reliably and firmly connected and integrated.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a partially cutaway front view of a cannula with protrusions formed on the outer surface of the peripheral wall surface, and Fig. 2 is a cross section taken along line A-A in the same drawing. Figure 3 is a partially omitted side view, Figure 4 is a partially cutaway front view of the cannula with protrusions formed on the inner surface of the peripheral wall surface, and Figure 5 is the same as above. -B sectional view, FIG.
The figure is a cross-sectional view of a conventional sleeve, and FIG. 8 is a cross-sectional view showing a state when the conventional sleeve is used. 2, 2'... Both ends, 3... Mantle, 4... Peripheral wall surface, 5...
Protrusions, 6, 6'... Shoulders at both ends, 7... Gently arched.

Claims (1)

[Scope of Claim for Utility Model Registration] A sleeve made of thin steel plates of a constant width with both ends abutted against each other, and in which a protrusion in the axial direction is continuously extruded on the circumferential wall of the sleeve. The middle of the strip 5 is connected to the shoulders 6 at both ends of the protrusion 5,
A sleeve for fixing a fitting member formed in a gently arched shape 7 slightly higher than 6'.