JPH0313444B2 - - Google Patents

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. 7, a split bearing sleeve is a bearing that supports a drive shaft rotating in muddy water or muddy soil of a deep soft ground improvement machine, and is arranged on the outside of the bearing. It is used for the contact surface with the seal member A. In addition, since both end surfaces 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, the drive shaft B is divided in the circumferential direction in consideration of replacement. 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 entirely 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 kind 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 throughout.

For this reason, conventionally, as shown in FIG.
1, and then apply adhesive 6 inside this adhesive margin 11 and attach it to the sleeve main body 1. Alternatively, as shown in FIG. There is a method of forming a sleeve, applying an adhesive 6, and sticking it to the sleeve body 1.

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 for regulating the relative position between the sleeve bodies 1, the thickness of the adhesive layer tends to be uneven, as shown in FIG. 10.

(Problems to be Solved by the Invention) Therefore, in conventional bearing sleeves, it is difficult to maintain a constant thickness of the adhesive layer, so the adhesive strength is insufficient and the wear-resistant material easily peels off. There was a risk that the wear-resistant 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-mentioned points, and when the wear-resistant material is adhered with adhesive into the recess of the split sleeve main body, the thickness of the adhesive layer can be made uniform over the entire circumference. The object of the present invention is 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 wear-resistant materials.

(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 A split-type 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 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 bearing sleeve of the present invention, the wear-resistant material is bonded while being positioned by the fixing pin inserted into the split bearing sleeve main body, so the thickness of the adhesive layer is kept constant. The planned adhesive strength can be reliably obtained, and even if the adhesive surface peels off during operation, the wear-resistant material is restricted by the fixed pin and does not rotate, so the wear-resistant material prevents wear and tear on the split bearing sleeve body. It is.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Fig. 1 is a sectional view taken along the line - - of Fig. 2, Fig. 2 is a side view of the split type bearing sleeve, and Fig. 7 is a half cross section showing part of a soft ground improving machine using the split type bearing sleeve of the present invention. It is a 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 positioning fixing pin (Fig. 3), which consists of a small diameter tip 3a and a large diameter head 3b;
A male thread 3c is engraved on the side circumferential surface of. A pin hole 4 for inserting a fixing pin 3 is bored at one end of this split bearing sleeve main body 1.
Female screw hole 4a formed on the large diameter side of this pin hole 4
The fixing pin 3 is inserted by screwing together the male screw 3c of the fixing pin 3. 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 made 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 inserted into the tip of the fixing pin 3.
The wear-resistant material 5 is fitted into the recess 2 by fitting into the upper half protruding part of a, and is attached to the split bearing sleeve main body 1.

In this way, the wear-resistant material 5 is adhered to the split bearing sleeve main body 1, and after the adhesive 6 has dried, finishing processing 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.

In advance, the split bearing sleeve body 1 and the wear-resistant material 5 are
After finishing at least the adhesive surface of the fixing pin 3, the fixing pin 3 is screwed and inserted into the female threaded hole 4a of the pin hole 4. Then, the recess 2 of the split bearing sleeve body 1
An adhesive 6 is applied to the inner surface 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 in FIG.
The displacements of X' and Y are kept constant by being restrained by the fixing pin 3 and by making both end split surfaces 1' of the split bearing sleeve body 1 and both end faces 5' of the wear-resistant material 5 parallel to each other. .

In addition, as shown in FIG. 6, the deviation angle θ of the wear-resistant material 5 in the axial direction: tanθ=[L _B −L _C /2 (R _O +T _C )]
Although there remains a risk that the thickness of the adhesive layer may become uneven due to
By making the dimensional difference between the width L _B of the wear-resistant material 5 and the width L _C of the wear-resistant material 5 as small as possible, it is possible to almost eliminate the difference, so that the thickness of the adhesive layer can be made uniform over the entire surface. Note that T _C indicates the dimension of the finish machining allowance, and R _O 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 into only one end surface of the split bearing sleeve 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 and the method for manufacturing the same according to the present invention have the above-described configuration, and therefore have the following effects.

(1) 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, so the thickness of the adhesive layer is constant throughout and the planned Adhesive strength can be reliably obtained.

(2) Even if the adhesive surface peels off during operation, the wear-resistant material is restricted by the fixed pin and will not rotate, so the wear-resistant material will not damage the split bearing sleeve body. It is convenient because it can be reattached.

(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 attach the sleeve to both end faces of the wear-resistant material. Since both divided end faces of the main body are made parallel, the adhesive layer can be reliably held uniformly over the entire body with a simple operation.

[Brief explanation of the drawing]

Fig. 1 is a sectional view taken along the line - - of 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 a fixing pin for positioning, and Fig. 4 is a sectional view taken along the line - FIG. 5 is a sectional view taken along the line -- in FIG. 1, FIG. 6 is a plan view of FIG. 5, and FIG. 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
... Fixed pin for positioning, 4 ... Pin hole, 5 ...
Wear-resistant material, 6...adhesive.

Claims (1)

[Claims] 1. A split-type bearing in which an annular recess is provided on the outer or inner peripheral surface of each split bearing sleeve body divided in the circumferential direction, and a sleeve-shaped wear-resistant material is adhered to the recess. In the sleeve, a positioning fixing pin is inserted so that a sealing member is brought into contact with the outer circumferential surface or inner circumferential surface of the wear-resistant material, and a pin tip portion protrudes into the recess from at least one end side of the split bearing sleeve main body. A split type bearing sleeve that is characterized by the fact that 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 the pin tip portion protrudes into the recess from at least one end side of the divided bearing sleeve body. A fixing pin for positioning is inserted into the recess, an adhesive is applied inside the recess, a wear-resistant material with a pin hole corresponding to the protruding tip of the fixing pin is pasted inside the recess, and after the adhesive dries. A method for manufacturing a split bearing sleeve, which is characterized by performing finishing processing.