JPH0724669A - Assembly method and device for split type bearing - Google Patents

Abstract

PURPOSE:To provide a method and a device unnecessary for fastening a bearing split member and for providing automatic assembly easily in a simple constituted device when a bearing is assembled at periphery of a crank shaft of a split type bearing. CONSTITUTION:An assembly method for a split type bearing 1 divided into two parts to circumference direction at a divided surface along axial direction and it contains the following respective process. One bearing split member 1A is placed on an underside of a crank shaft 6 supported nearly horizontally with mounted it on a circular shaped guide surface 23 of a bearing lifting member 11. A circular guide surface 25 of an overhead guide 12 is covered over an upper side of the crank shaft 6. The bearing split member 1A is moved along the both guide surfaces 23 and 25 by a reversing arm 13 in this state and positioned between the top surface of the crank shaft 6 and the overhead guide 12. The overhead guide 12 descends a little and locks the bearing split member 1 (A). Then the bearing lifting member 11 descends and ascends again to place the other bearing split member 1A on a rear face of the crank shaft 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split bearing assembly method and device for assembling a split bearing on the outer circumference of a crankshaft or other bearing assembly shaft.

[0002]

2. Description of the Related Art Conventionally, a support bearing or the like for supporting a crankshaft of an internal combustion machine in a crankcase cannot be fitted on the shaft as an integral type, so split bearings as shown in FIGS. 8 and 9 have been used. There is. This split bearing 1
An outer ring 2 and a caged roller 3 are formed. The outer ring 2 and the caged roller 3 are divided by axially divided surfaces a and b, respectively, so that the entire bearing 1 is circumferentially divided into two bearing divided bodies 1A. , 1A. The pair of divided bodies 2A, 2A of the outer ring 2 has an annular coupling groove 4 extending over both sides of the split surface a.
And a snap ring 5 is fitted in the coupling groove 4 to be coupled to each other. As the snap ring 5, various ones other than a rubber ring, a metal ring, a chrysanthemum washer are used. The work of assembling the two bearing split bodies 1A, 1A on the outer periphery of the shaft is performed manually because it is difficult to mechanize.

[0003]

As described above, the conventional assembly is performed manually, but it is inefficient, and mechanization is desired. However, since the split type bearing 1 is a set of the outer ring 2 and the caged roller 3, it is difficult to handle each of the bearing divided bodies 1A in a divided state. Therefore, an appropriate chuck could not be manufactured and automatic assembly could not be performed.

An object of the present invention is to provide a split bearing assembling method and device which do not require chucking of a bearing divided body and can be easily and automatically assembled by a device having a simple structure.

[0005]

A method of assembling a split type bearing according to the present invention is a method of assembling a split type bearing which is divided into two in a circumferential direction by a split surface along the axial direction. Including. That is, one bearing division is placed on the arc-shaped guide surface of the bearing lifting member on the lower surface of the bearing assembly shaft that is supported substantially horizontally, and the arc-shaped ceiling guide is arranged above the bearing assembly shaft. Cover the guide surface. The bearing split body on the bearing lifting member is moved along both the guide surfaces to be positioned between the upper surface of the bearing assembly shaft and the ceiling guide. After opening the bearing lifting member downward, the other bearing split body is arranged on the lower surface of the bearing assembly shaft.

The split bearing assembling apparatus of the present invention is an apparatus used in the above assembling method and has the following construction.
That is, it is provided with a shaft support mechanism that supports the bearing assembly shaft substantially horizontally, a bearing lifting member, a ceiling guide, and a reversing device. The bearing lifting member has an arcuate guide surface on which the bearing divided body is placed, has an upper end and is provided to be movable up and down, and the bearing divided body is arranged on the lower surface of the bearing assembly shaft. The ceiling guide has a downward arcuate guide surface, and faces the bearing lifting member and covers the bearing assembly shaft. The reversing device is a device that moves the bearing divided body on the bearing lifting member along the guide surfaces and positions it between the upper surface of the bearing assembly shaft and the ceiling guide.

[0007]

According to the method and apparatus of the present invention, since the ceiling guide is used, the bearing divided body on the bearing lifting member can be moved to the upper side of the bearing assembly shaft without chucking. Therefore, it is not necessary to provide a complicated chuck device, and the divided bearing body can be assembled on the outer periphery of the bearing assembly shaft with a simple structure.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This split bearing assembly device is a device for assembling the split bearing 1 described with reference to FIGS. 8 and 9 into the bearing groove 6a of the crankshaft 6 which is partially enlarged in FIG. 5B.

The outline of the entire apparatus will be described. As shown in a broken side view in FIG. 4 and in a plan view in FIG.
Is a shaft support mechanism 8 including a pair of center chucks 7, 7.
Thus, it is supported horizontally at the crankshaft support position P at the center of the device. The center chucks 7, 7 are fixedly installed on the base 9, and the tapered center 7a can be projected and retracted by a cylinder device (not shown) or the like. The split type bearing 1 is assembled to the crankshaft 6 in two bearing grooves 6a.

Below the crankshaft support position P, a bearing lifting member 11 for lifting the bearing divided body 1A in the bearing magazine 10 to the crankshaft 6 is installed, and a ceiling guide 12 is installed above it to face it. Bearing lifting member 11
Two units are provided for each bearing groove 6a of the crankshaft 6, and one ceiling guide 12 also serves as both bearing grooves 6a. The bearing magazine 10 accommodates a large number of bearing divided bodies 1A arranged side by side in the axial direction such that the divided surfaces face upward, and the bottom surface thereof has an opening through which the bearing lifting member 11 can pass.

On the outer circumference of each center chuck 7, a pair of reversing arms 13, 13 for reversing the bearing divided body 1A arranged between the bearing lifting member 11 and the ceiling guide 12 are provided. Each reversing arm 13 is capable of reversing and advancing / retreating, and the reversing / advancing / retreating driving device (not shown) and the reversing arm 13 constitute a reversing device 14.

As shown in the front view of FIG. 1, an installation table 16 for the crankshaft box 15 is provided on the left side of the base 9, and the crankshaft 6 is conveyed above the installation table 16 from the crankshaft box 15 to the crankshaft support position P. A crankshaft transfer device 17 is provided. On the other side of the base 9, a magazine table 18, a magazine shutter 19, and an empty magazine ejecting device 20 are installed, and the bearing magazine 10 is conveyed from the magazine shutter 19 to a position directly below the crankshaft support position P. A distribution device 21 is provided. On both sides of the crankshaft support position P, snap ring inserting devices 22 for fitting the snap ring 5 into the split bearing 1 are installed.

Details of each unit will be described. As shown in FIG. 5, the ceiling guide 12 has an arcuate guide surface 25 that fits on the outer diameter surface of the split bearing 1, and an engagement piece 12b that engages with a predetermined portion of the crankshaft 6 (see FIG. B)) is provided at both ends, and the ceiling guide elevating device 26 (FIG. 1), which is a cylinder device, can be used to raise and lower a little.

As shown in FIGS. 5 (B) and 6 (B), the bearing lifting member 11 is composed of two split lifting members 11a and 11b overlapping in the axial direction of the crankshaft 6, and the upper ends of both are split. It is an arcuate guide surface 23 having an inner diameter into which the die bearing 1 is fitted. These split lifting members 11a, 11
b can be independently moved up and down by separate lift cylinders 24 (only one is shown in FIG. 1). The bearing lifting member 11 and the ceiling guide 12 are provided with snap ring insertion windows 47 and 48 on both side surfaces, as shown in FIG.

Adjacent to the bearing lifting member 11, a side guide 27 for guiding the outer ring end surface of the bearing split body 1A is provided upright during its lifting stroke, and a roller positioning device 28 (FIG. 4) is provided near the upper end. It is provided. The roller positioning device 28, as shown in the enlarged view of FIG.
By pushing the caged roller 3 with a, the axial positional relationship between the roller 3 and the outer ring 2 is made uniform.
As shown in FIGS. 3 and 5, the reversing arm 13 is formed in a bifurcated shape, and the pair of tip portions 13a are engaged with the outer ring 2 of the bearing split body 1A and both end surfaces of the cage 3, respectively. It extends inwardly in an L shape.

In FIG. 1, the crankshaft box 15
Has a pallet shape on which a large number of crankshafts 6 are arranged in parallel. The crankshaft transport device 17 has a pair of shaft chucks 31 that grips both ends of the crankshaft 6, and travels between the crankshaft box 15 and the crankshaft support position P by a motor 30 via a feed screw 29. Driven. It should be noted that the assembled crankshaft mounting table 3 of FIG. 3 is adjacent to the crankshaft box mounting table 16 of the base 9.
2 is provided.

The magazine table 18 is a table on which a large number of bearing magazines 10 are placed side by side, and a magazine feeding device 33 for sequentially feeding the bearing magazines 10 to the center side is provided. The magazine shutter 19 shown in FIG. 1 serves both as a stopper for regulating the position of the first bearing magazine 10 pushed out from the magazine table 18 and as a stand for receiving the magazine. It is possible. The magazine ejecting device 20 inserts the bearing magazine 10 on the magazine shutter 19 into the front empty magazine table 49.
(Fig. 3).

The magazine distribution device 21 is a device that conveys the bearing magazine 10 between the magazine shutter 19 and a position directly below the crankshaft support position P, and also vertically feeds the bearing magazine 10 at the position directly below. 2 is configured as shown in a plan view in FIG. That is, a cross slide 38 is movably installed in the carriage 35 that is movable left and right on the rail 34 via the rail 37, and a magazine chuck 39 is provided on the cross slide 38. The carriage 35 is driven forward and backward by a motor 40 and a feed screw 41, and the cross slide 38 is driven forward and backward by a motor 42 and a feed screw 43 on the carriage 35.

As shown in FIG. 3 and FIG. 1, the snap ring inserting device 22 has a total of four inserting heads 4 for each pair of split bearings 1 on the crankshaft 6.
4 and a ring carrier rail 46 for feeding a snap ring from the two parts feeders 45 to the insertion heads 44 at two places respectively. The insertion head 44 is swingably driven between a downward angle corresponding to the ring transport rail 46 and a horizontal angle facing the crankshaft support position P. As shown in FIG. 6 (A), the tip of the insertion head 44 is such that a fitting shaft 44a for externally fitting the snap ring 5 can be projected and retracted and is biased by a spring member (not shown). A drive device (not shown) for moving the entire insertion head 44 forward and backward is also provided.

The operation of the above configuration will be described. As shown in FIG. 1, a large number of crankshafts 6 are arranged in a crankshaft box 15. The crankshaft 6 of the box 15 is chucked by the crankshaft transfer device 17 and transferred to the crankshaft support position P, where the center chuck 13 is moved.
(FIGS. 3 and 4). After this chucking, the crankshaft transport device 17 returns to above the crankshaft box 15.

The split bearing 1 is packed in a bearing magazine 10 in the form of a bearing split body 1A. Bearing magazine 10
Are arranged on the magazine table 18 and supplied to the magazine shutter 19 by the magazine feeder 33 (FIG. 3) when necessary. The bearing magazine 10 on the magazine shutter 19 is chucked by the magazine distribution device 21 and set right below the crankshaft support position P. The magazine distribution device 21 has the bearing magazine 10 in the longitudinal direction (direction of the arrow Y in FIG. 2) just below the crankshaft 6.
The bearing division body 1A to be sequentially supplied is positioned immediately below the bearing groove 6a of the crankshaft 6. When this positioning is completed, the bearing lifting member 11 raises the bearing split body 1A.

During the ascent, the roller positioning device 28 (FIGS. 4 and 7) establishes a relative axial positional relationship between the outer ring 2 and the caged roller 3, and then, as shown in FIG.
As shown in (B), the bearing split body 1A is inserted into the bearing groove 6a of the crankshaft 6. The split surface of the inserted bearing split body 1A is guided by the reversing arm 13. A ceiling guide 12 covers the crankshaft 6. In the bearing lifting member 11, both the lifting members 11a and 11b move to the rising end when the bearing split body 1A is lifted.
After the lifting is completed, one split lifting member 11a is shown in FIG.
As shown in (B), it descends and prepares for the rotation of the reversing arm 13.

The reversing arm 13 holds the divided end faces of the outer ring 2 of the bearing divided body 1A and the caged roller 3 while holding the divided end face 1
Rotate 80 °. The bearing split body 1A is guided by the guide surface 23 of the bearing lifting member 11 when it is below the crankshaft 6, and is guided by the guide surface 25 of the ceiling guide 12 when it is moved upward (FIG. 5C). ). When the bearing split body 1A is completely moved to the upper position, the ceiling guide 12 is slightly lowered to lock the bearing split body 1A against the crankshaft 6 in a pressed state. After that, the reversing arm 13 escapes in the axial direction, and the other half of the divided bearing body 1A is lifted from the bearing magazine 10 by the bearing lifting member 11 and inserted into the bearing groove 6a of the crankshaft 6 (FIG. 6). .

When the bearing split bodies 1A, 1A are thus inserted into the bearing groove 6a of the crankshaft 6, the snap ring 5 is connected by the snap ring insertion head 44 across the bearing split bodies 1A, 1A. It is inserted into the groove 4. As a result, the assembly of the split bearing 1 is completed. The split type bearing 1 is assembled to the two bearing grooves 6a of the crankshaft 6 simultaneously or sequentially.

After assembling the split bearing 1 in this way,
Snap ring insertion head 44, bearing lifting member 11,
The ceiling guide 12 and the reversing arm 13 move away from the crankshaft support position P. The crankshaft 6 on which the bearing 1 is assembled is mounted on the crankshaft transport device 17 to form the crankshaft box 1.
5 in its original position or other predetermined position.

According to this assembling method and apparatus, since the ceiling guide 12 is used in this manner, the bearing lifting member 1
It is possible to move the bearing divided body 1A on the upper side of the crankshaft 6 without chucking. Therefore, it is not necessary to provide a complicated chuck device, and the bearing split body 1A can be assembled on the outer circumference of the crankshaft 6 with a simple structure. Although the above embodiment has described the case where the split type bearing 1 is assembled to the crankshaft 6, the present invention can be applied to the case where the split type bearing 1 is assembled to other various bearing assembly shafts.

[0027]

According to the assembling method and apparatus of the present invention, since the ceiling guide is used, it is possible to assemble the bearing divided body to the bearing assembly shaft without chucking. Therefore, it is not necessary to provide a complicated chuck device, and mechanization of assembly can be realized with a simple configuration.

[Brief description of drawings]

FIG. 1 is a schematic cutaway front view of a split bearing assembly device according to an embodiment of the present invention.

FIG. 2 is a plan view taken along line II-II of FIG.

FIG. 3 is a partially omitted plan view of the assembly apparatus.

FIG. 4 is a schematic vertical sectional side view of the assembly apparatus.

FIG. 5 is an operation explanatory view of the assembling apparatus.

FIG. 6 is an operation explanatory view showing the post-process of FIG. 5 of the assembling apparatus.

FIG. 7 is a cross-sectional view showing a relationship between a roller positioning device and a bearing divided body of the assembly apparatus.

FIG. 8 is a front view and a partial cross-sectional view of a split type bearing that is assembled using the assembly apparatus.

FIG. 9 is a perspective view and a partial side view of an outer ring of the bearing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Split bearing, 1A ... Bearing split body, 5 ... Snap ring, 6 ... Crank shaft (bearing assembly shaft), 7 ... Center chuck, 8 ... Shaft support mechanism, 10 ... Bearing magazine, 11 ... Bearing lifting member, 12 … Ceiling guide, 13… Reversing arm, 1
4 ... Reversing device, 15 ... Crankshaft box, 17 ... Crankshaft conveying device, 18 ... Magidine table, 19 ... Magazine shutter, 21 ... Magazine distribution device, 22 ... Snap ring inserting device, 23, 25 ... Arc guide Surface, 44
… Insertion head, P… Crankshaft support position

Claims (2)

[Claims] 1. A method of assembling a split type bearing, which is divided into two in a circumferential direction at a split surface along the axial direction, wherein one bearing split body is provided on the lower surface of a bearing assembly shaft supported substantially horizontally. A process of placing the bearing guide member on the circular arc guide surface and covering the circular arc guide surface of the ceiling guide on the upper side of the bearing assembly shaft, and the bearing split body on the bearing lift member on the both guide surfaces. A process of moving the bearing assembly shaft between the upper surface of the bearing assembly shaft and the ceiling guide, and after opening the bearing lifting member downward, disposing the other bearing split body on the lower surface of the bearing assembly shaft. And a method of assembling a split bearing including a process. 2. An apparatus for assembling a split type bearing, which is divided into two parts in a circumferential direction by a split surface along the axial direction, wherein a shaft support mechanism for supporting a bearing assembly shaft in a substantially horizontal direction and a bearing split body are mounted. A bearing lifting member that has an arcuate guide surface at the upper end and is provided so as to be able to move up and down, and disposes the bearing split body on the lower surface of the bearing assembly shaft, and has a downward arcuate guide surface and faces the bearing lifting member Then, the ceiling guide covering the shaft with the bearing assembly and the bearing split body on the bearing lifting member are moved along the both guide surfaces to be positioned between the upper surface of the shaft with the bearing assembly and the ceiling guide. And a device for assembling split bearings.