JPS62147111A - Divided bearing sleeve and its manufacture - Google Patents

Abstract

PURPOSE:To prevent damage through sure adhesion by forming a ring-shaped recess at the outside or inside surface of a divided bearing sleeve body, fitting a pin in said recess in such a way as protruding at one end of the body, coating adhesive at the recess, and affixing an anti-abrasive material followed by finish processing. CONSTITUTION:A ring-shaped recess 2 is formed at the outside surface of a bearing sleeve body 1 divided into halves or segment, and a pin hole 4 is provided in the ring-shaped recess 2 from the end face of said bearing sleeve body 1, and a locating fix pin 3 is fitted in such a way as protruding into the recess 2. Then an anti-abrasive material 5 such as ceramic is formed into circle halves with possibility of fitting in said recess 2, followed by coating of an adhesive 6 over the internal surface 2 of each of these halves or over the surface of the recess 2, and they are bonded fast to then undergo finish processing upon drying the adhesive 6. Accordingly the adhesive layer is uniform to ensure strong bond, and the fix pin does not allow rotation of the anti-abrasive material, which should lead to prevention of wearout of the divided bearing sleeve body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a split bearing sleeve having a wear-resistant material on the outer or inner circumferential surface.

(Prior art) For example, as shown in FIG.
This is a bearing that supports a drive shaft rotating in muddy water or muddy soil of a deep soft ground improvement machine, and is used for the contact surface with a seal member A disposed on the outside. In addition, both ends of the drive shaft B to which this bearing is mounted may have a flange connection part C, etc., which is larger than the shaft diameter to which the bearing sleeve is attached, so in consideration of replacement, it is divided into two parts in the circumferential direction. configured to be possible. Furthermore, experimental tests have shown that bearing sleeves with a structure made of wear-resistant steel, ceramic, or other wear-resistant materials pasted on a base material of ordinary steel are more durable than sleeves made of completely hardened steel. As a result of these findings, split-type bearing sleeves with wear-resistant materials pasted on them are being put into practical use.

By the way, in this type of split-type bearing sleeve, when the wear-resistant material is attached with an adhesive, it is necessary to make the thickness of the adhesive layer uniform over the whole.

For this reason, conventionally, as shown in FIG. 8, an adhesive margin 11 is formed on one surface of five wear-resistant materials by leaving a peripheral portion, and the adhesive 6 is applied within this adhesive margin 11. Alternatively, as shown in FIG. 9, an adhesive layer 12 is formed on the entire surface of the wear-resistant material 5, and adhesive 6 is applied to the sleeve body 1. be.

However, in the former case, due to the pressing force when attaching the wear-resistant material 5, the adhesive in the adhesive margin 11 protrudes to the peripheral edge, and in the latter case, the wear-resistant material 5 Since there is no member regulating the relative position between the sleeve bodies 1,
As shown in FIG. 10, the thickness of the adhesive layer tends to be non-uniform.

(Problems to be Solved by the Invention) Therefore, in conventional bearing sleeves, it is difficult to keep the thickness of the adhesive layer constant, so the adhesive strength is insufficient and the wear-resistant material easily peels off. There was a risk that the wear material 5 would be restrained by the seal member A (FIG. 7) and rotate on the adhesive surface with the sleeve body, damaging the sleeve body.

This invention was made in view of the above points, and when the wear-resistant material is adhered to the recess of the split sleeve main body using an adhesive, the thickness of the adhesive layer can be made uniform over the entire circumference.
It is an object of the present invention to provide a split bearing sleeve and a method for manufacturing the same, which prevents wear and tear on the sleeve body by regulating the relative rotation of a wear-resistant material to the sleeve body.

(Means for Solving the Problems) The gist of the split bearing sleeve of the present invention for achieving the above object is that the outer circumferential surface or inner circumferential surface of each split bearing sleeve main body divided in the circumferential direction This is a split bearing sleeve in which an annular recess is formed in the recess, and a sleeve-shaped wear-resistant material is bonded to the recess, and a sealing member is brought into contact with the outer circumferential surface or the inner circumferential surface of the wear-resistant material, and the split bearing sleeve The positioning fixing pin is inserted so that the tip end portion of the pin projects into the recess from at least one end side of the main body. In addition, the gist of the manufacturing method is that an annular recess is provided on the outer circumferential surface or inner circumferential surface of each divided bearing sleeve body divided in the circumferential direction, and at least one end side of the divided bearing sleeve body is A positioning fixing pin is inserted into the recess so that the pin tip protrudes, an adhesive is applied inside the recess, and a wear-resistant material with a pin hole corresponding to the protruding tip of the fixing pin is inserted into the recess. The adhesive is pasted on the premises and the finishing process is applied after the adhesive dries.

(Function) According to the split type bearing sleeve of the present invention, the wear-resistant material is
Since the fixed pin inserted into the split bearing sleeve body positions the adhesive in place, the thickness of the adhesive layer remains constant to ensure the desired adhesive strength, and the adhesive surface does not peel off during operation. Even if this happens, the wear-resistant material is restricted by the fixing pin and does not rotate, so the wear-resistant material does not cause wear and tear on the split bearing sleeve main body.

(Example) Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is a sectional view taken along the line I-I in Fig. 2, Fig. 2 is a side view of the split type bearing sleeve, and Fig. 7 shows a part of a soft ground improving machine using the split type bearing sleeve of the present invention. It is a half-sectional front view.

In the figure, reference numeral 1 denotes a bearing sleeve body that is divided into a plurality of parts (in this case, two parts) in the circumferential direction, and an annular recess 2 is formed on the outer peripheral surface of the divided bearing sleeve body 1, leaving both ends. has been done.

3 is a fixed pin for positioning (Fig. 3), with a small diameter tip 3
a and a large diameter head 3b, and a male thread 3c is carved on the side circumferential surface of the head 3b. A pin hole 4 for inserting the fixing pin 3 is drilled at one end of the split bearing sleeve main body 1, and the fixing pin 3 is inserted into the female screw hole 4a formed on the large diameter side of the pin hole 4. The fixing pin 3 is inserted by screwing the male screw 3c. In this state, the upper half of the tip 3a of the fixing pin 3 protrudes into the recess 2.

5 is a wear-resistant material such as ceramic or wear-resistant steel, and this wear-resistant material 5 is formed in a semicircular shape that can be fitted into the annular recess 2. A fixing pin 3 is provided at the center of the inner peripheral surface of the wear-resistant material 5. A pin groove 5a corresponding to the upper half protruding portion of the tip 3a is formed. Further, the thickness of the wear-resistant material 5 is slightly thinner than the depth of the recess 2 in consideration of the adhesive.

Then, with the adhesive 6 applied to the inner peripheral surface of the wear-resistant material 5, the pin groove 5a is fitted into the upper half protrusion of the tip 3a of the fixed pin 3, and the wear-resistant material 5 is fitted into the recess 2. Then, attach it to the split bearing sleeve main body 1.

In this way, the wear-resistant material 5 is divided into the bearing sleeve body 1.
After the adhesive 6 has dried, finishing is performed as necessary.

FIG. 4 shows a modification of the fixing pin 3, in which the peripheral edge of the tip of the pin is tapered in order to smoothly insert the fixing pin 3 into the pin hole 4.

Next, a method of manufacturing the split type bearing sleeve of the above embodiment will be explained.

After finishing at least the adhesive surfaces of the split bearing sleeve body 1 and the wear-resistant material 5 in advance, the fixing pin 3 is inserted into the pin hole 4.
Insert by screwing into the female threaded hole 4a. Then, adhesive 6 is applied to the inner surface of the recess 2 of the split bearing sleeve body 1 or the inner peripheral surface of the wear-resistant material 5, and the wear-resistant material 5 is fitted into the recess 2. At this time, both end dividing surfaces 1' of the split bearing sleeve body 1 and both end surfaces 5' of the wear-resistant material 5 are made parallel to each other. In this way, X, χ1. The displacement of Y is restrained by the fixing pin 3, and the two end faces 1° of the split bearing sleeve body 1 and the both end faces 5″ of the wear-resistant material 5
are maintained constant by being parallel to each other.

As shown in FIG. 6, the deviation angle θ of the wear-resistant material 5 in the axial direction is: tan θ= (Le −Lc /2 (R
.

+Tc)), there remains a risk that the thickness of the adhesive layer may become uneven, but the deviation angle θ in the axial direction is determined by the width Lll of the recess 2 and the width Lc of the wear-resistant material 5. By making the dimensional difference as small as possible, almost no difference can be caused, so that the thickness of the adhesive layer can be made uniform over the entire area. Note that Tc indicates the dimension of the finish machining allowance, and Ro indicates the radius of the sleeve after finish machining.

After confirming that the adhesive 6 has dried and the wear-resistant material 5 is completely adhered to the split bearing sleeve main body 1, the split bearing sleeve is completed by finishing the surface as necessary. It is.

By the way, in the above embodiment, the fixing pin 3 is inserted only into one end surface of the split bearing sleeve main body 1, but the fixing pin 3
may be inserted into both end surfaces of the split bearing sleeve main body 1.

(Effects) As explained above, the split-type bearing sleeve of the present invention and the method for manufacturing the same have the above-described configuration, and therefore have the following effects.

(1) Since the wear-resistant material is pasted into the recess of the main body while being positioned by the fixing pin inserted into the split bearing sleeve main body, the thickness of the adhesive layer is constant over the entire body, resulting in the expected adhesive strength. can be obtained with certainty.

(2) Even if the adhesive surface peels off during operation, the wear-resistant material is restricted by the fixing pin and will not rotate, so the wear-resistant material will not damage the split bearing sleeve body. It's convenient to wear.

(3) When pasting the wear-resistant material into the recess of the split bearing sleeve body, fit the pin groove of the wear-resistant material into the fixing pin inserted into the end face of the split bearing sleeve body, and connect both end faces of the wear-resistant material to the sleeve. Since both end faces of the main body are parallel,
The adhesive layer can be reliably held uniformly over the entire surface with a simple operation.

[Brief explanation of drawings]

Fig. 1 is a sectional view taken along the line 1-1 in Fig. 2 showing an embodiment of the split type bearing sleeve of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a front view of the positioning fixing pin, and Fig. 4 5 is a front view of another embodiment of the positioning fixing pin, FIG. 5 is a sectional view taken along line V-V in FIG. 1, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is a split type bearing of the present invention. A half-sectional front view showing a part of a soft ground improving machine using a sleeve, FIGS. 8 and 9 are sectional views of a conventional split-type bearing sleeve, and FIG. 10 is a sectional view of the same in a different cutting direction. 1... Split bearing sleeve body, 2... Recess, 3...
・Fixing pin for positioning, 4... Pin hole, 5... Wear-resistant material, 6... Adhesive.

Claims (2)

[Claims] (1) A split bearing sleeve in which an annular recess is provided on the outer or inner peripheral surface of each split bearing sleeve main body divided in the circumferential direction, and a sleeve-shaped wear-resistant material is bonded to the recess. , a sealing member is brought into contact with the outer circumferential surface or the inner circumferential surface of the wear-resistant material, and a positioning fixing pin is inserted such that the pin tip portion protrudes into the recess from at least one end side of the split bearing sleeve body. Features a split bearing sleeve. (2) An annular recess is provided in the outer peripheral surface or inner peripheral surface of each divided bearing sleeve body divided in the circumferential direction, and a pin tip portion protrudes into the recess from at least one end side of the divided bearing sleeve body. Insert the positioning fixing pin so that the positioning pin is in place, apply adhesive to the inside of the recess, stick a wear-resistant material in the recess with a pin hole corresponding to the protruding tip of the fixing pin, and apply adhesive to the inside of the recess. A method for manufacturing a split bearing sleeve, which is characterized by performing finishing processing after drying.