JP3249649B2 - Split type bearing assembly method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for assembling a split type bearing for assembling a split type bearing on the outer periphery of a crankshaft or other bearing-mounted shaft.

[0002]

2. Description of the Related Art Conventionally, a split bearing as shown in FIGS. 8 and 9 has been used for a support bearing or the like for supporting a crankshaft of an internal combustion machine on a crankcase because it cannot be fitted on the shaft by an integral type. I have. This split bearing 1
The outer ring 2 and the caged roller 3 are divided by the divided surfaces a and b along the axial direction, respectively, and the entire bearing 1 is divided into two bearing divided bodies 1A in the circumferential direction. , 1A. A pair of divided bodies 2A, 2A of the outer ring 2 is formed with an annular coupling groove 4 extending over both sides of the split surface a.
And a snap ring 5 is fitted into the coupling groove 4 to be coupled to each other. As the snap ring 5, various types other than rubber rings, metal rings, chrysanthemum washers, and the like are used. The operation of assembling the two-bearing split bodies 1A, 1A on the outer periphery of the shaft is performed manually because of difficulty in mechanization.

[0003]

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

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for assembling a split type bearing, 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 an assembling method of a split type bearing which is divided into two parts in a circumferential direction at a split surface along an axial direction. Including. That is, on the lower surface of the bearing assembly shaft supported substantially horizontally, one of the bearing split bodies is placed on the arc-shaped guide surface of the bearing lifting member, and the arc shape of the ceiling guide is provided above the bearing assembly shaft. Cover the guide surface. The bearing split on the bearing lifting member is moved along the two guide surfaces to be positioned between the upper surface of the bearing assembly shaft and the ceiling guide. After the bearing lifting member is opened downward, the other bearing split is disposed on the lower surface of the bearing assembly shaft.

A split bearing assembly device according to the present invention is used for the assembling method and has the following configuration.
That is, it includes 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 arc-shaped guide surface on an upper end on which the bearing divided body is placed, and is provided so as to be able to move up and down, and arranges the bearing divided body on the lower surface of the bearing assembly shaft. The ceiling guide has a downwardly directed arcuate guide surface and covers the bearing mounting shaft above the bearing lifting member. The reversing device is a device that moves the bearing split on the bearing lifting member along the two guide surfaces and positions the split bearing 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 split on the bearing lifting member can be moved to the upper side of the bearing mounting shaft without chucking. Therefore, it is not necessary to provide a complicated chuck device, and the bearing split body can be assembled on the outer periphery of the bearing assembly shaft with a simple configuration.

[0008]

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

An outline of the entire apparatus will be described. As shown in a broken side view in FIG. 4 and a plan view in FIG.
Is a shaft support mechanism 8 comprising a pair of center chucks 7,7.
Thus, the device is horizontally supported 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 protruded and retracted by a cylinder device (not shown) or the like. In the crankshaft 6, split type bearings 1 are respectively assembled 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 facing the upper part thereof. Bearing lifting member 11
Are provided for each bearing groove 6a of the crankshaft 6, and one ceiling guide 12 is also used for both bearing grooves 6a. The bearing magazine 10 accommodates a large number of divided bearing bodies 1A arranged in the axial direction such that the divided surfaces face upward, and has an opening on the bottom surface through which the bearing lifting member 11 can pass.

On the outer periphery of each center chuck 7, a pair of reversing arms 13, 13 for reversing the bearing split 1A disposed between the bearing lifting member 11 and the ceiling guide 12 are provided. Each reversing arm 13 is capable of reversing and moving forward and backward, and a reversing device 14 (not shown) and the reversing arm 13 constitute the reversing device 13.

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

The details of each section will be described. As shown in FIG. 5, the ceiling guide 12 includes an arc-shaped 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)) are provided at both ends, and can be slightly moved up and down by driving a ceiling guide elevating device 26 (FIG. 1) composed of a cylinder device.

As shown in FIGS. 5 (B) and 6 (B), the bearing lifting member 11 is composed of two divided lifting members 11a and 11b which overlap in the axial direction of the crankshaft 6, all of which have upper ends split. It is an arc-shaped guide surface 23 having an inner diameter to which the mold bearing 1 fits. These divided lifting members 11a, 11
b can be independently raised and lowered by separate lifting cylinders 24 (only one is shown in FIG. 1). As shown in FIG. 6, snap ring insertion windows 47 and 48 are provided on both side surfaces of the bearing lifting member 11 and the ceiling guide 12, respectively.

Adjacent to the bearing lifting member 11, a side guide 27 is provided to guide the outer ring end face of the bearing divided body 1A during the vertical stroke, and a roller positioning device 28 (FIG. 4) is provided near the upper end. It is provided. The roller positioning device 28 includes a pressing member 28 as shown in an enlarged view in FIG.
By pressing 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 forked shape, and a pair of tip portions 13a are engaged with both end surfaces of the outer ring 2 and the cage 3 of the bearing split body 1A. It extends in an L-shape inward.

In FIG. 1, the crankshaft box 15
Is a pallet on which a number of crankshafts 6 are arranged in parallel. The crankshaft transporting device 17 has a pair of shaft chucks 31 for gripping 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. In addition, adjacent to the crankshaft box mounting table 16 of the base 9, the assembled crankshaft mounting table 3 of FIG.
2 are provided.

The magazine table 18 is a table on which a large number of bearing magazines 10 are placed side by side, and is provided with a magazine feeder 33 for feeding the bearing magazines 10 to the center side in order. The magazine shutter 19 in FIG. 1 serves as both a stopper for restricting the position of the earliest bearing magazine 10 extruded from the magazine table 18 and a table for receiving the magazine. It is possible. The magazine discharge device 20 is configured to move the bearing magazine 10 on the magazine shutter 19 to the front empty magazine table 49.
(FIG. 3).

The magazine distributing device 21 is a device for transporting the bearing magazine 10 between the magazine shutter 19 and a position directly below the crankshaft support position P, and for vertically feeding the bearing magazine 10 at the position immediately below. , FIG. 2 is a plan view. That is, a cross slide 38 is mounted on a carriage 35 which can move left and right on the rail 34 so as to be movable back and forth (Y-axis direction) via a 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 insertion device 22 includes a pair of insertion heads 4 for each of two split bearings 1 on the crankshaft 6.
4 and a ring transport rail 46 for sending a snap ring from the two parts feeders 45 to the two insertion heads 44 at each location. The insertion head 44 is swingably driven between a downward angle corresponding to the ring conveyance rail 46 and a horizontal angle facing the crankshaft support position P. As shown in FIG. 6A, the distal end of the insertion head 44 has a fitting shaft 44a for externally fitting the snap ring 5 which can be protruded and retracted, and is urged to project by a spring member (not shown). A driving 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, many 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 chuck, 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 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 fixed arrangement device 21 and is set immediately below the crankshaft support position P. The magazine distributing device 21 extends the bearing magazine 10 in the longitudinal direction (the direction of the arrow Y in FIG. 2) immediately below the crankshaft 6.
To position the bearing divided bodies 1A to be sequentially supplied immediately below the bearing grooves 6a of the crankshaft 6. When this positioning is completed, the bearing split body 1A is raised by the bearing lifting member 11.

During the ascent, the relative positioning of the outer race 2 and the caged roller 3 in the axial direction is determined by the roller positioning device 28 (FIGS. 4 and 7).
As shown in (B), the bearing split 1A is inserted into the bearing groove 6a of the crankshaft 6. The split surface of the inserted bearing split body 1 </ b> A is guided by the reversing arm 13. A ceiling guide 12 covers the crankshaft 6. When lifting the bearing split 1A, the bearing lifting member 11 moves up to the rising end of the two lifting members 11a and 11b.
After the lifting is completed, one of the divided lifting members 11a is
It descends as shown in (B) and prepares for rotation of the reversing arm 13.

The reversing arm 13 holds the outer ring 2 of the split bearing body 1A and the split end face of the roller 3 with cage while holding the split end face.
Rotate 80 °. The bearing split 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 moves upward (FIG. 5C). ). When the bearing split 1A is completely moved to the upper position, the ceiling guide 12 is slightly lowered to lock the bearing split 1A against the crankshaft 6 in a pressed state. Thereafter, the reversing arm 13 escapes in the axial direction, and the other half of the bearing split 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). .

As described above, when the split bearings 1A, 1A are inserted into the bearing grooves 6a of the crankshaft 6, the snap ring 5 is coupled by the snap ring insertion head 44 across the split bearings 1A, 1A. It is inserted into the groove 4. Thus, the assembly of the split bearing 1 is completed. The split bearings 1 are assembled simultaneously or sequentially with respect to the two bearing grooves 6a of the crankshaft 6.

After assembling the split bearing 1 in this manner,
Snap ring insertion head 44, bearing lifting member 11,
The ceiling guide 12 and the reversing arm 13 are separated from the crankshaft support position P. The crankshaft 6 with the bearing 1 attached thereto is moved by the crankshaft transport device 17 to the crankshaft box 1.
5 to the original position or another predetermined position.

According to this assembling method and apparatus, since the ceiling guide 12 is used in this manner, the bearing lifting member 1 is used.
1 can be moved to the upper side of the crankshaft 6 without chucking. Therefore, it is not necessary to provide a complicated chuck device, and the bearing divided body 1A can be assembled on the outer periphery of the crankshaft 6 with a simple configuration. In the above embodiment, the split type bearing 1 is assembled on the crankshaft 6, but the present invention can be applied to the case where the split type bearing 1 is assembled on other various bearing mounting 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 assembly shaft without chucking the bearing divided body. Therefore, there is no need to provide a complicated chuck device, and the mechanization of assembly can be realized with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a schematic cutaway front view of a split type bearing assembling apparatus according to an embodiment of the present invention.

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

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

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

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

FIG. 6 is an operation explanatory view showing a 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 split bearing body of the assembling device.

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

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Split type 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 transport device, 18 ... magazine table, 19 ... magazine shutter, 21 ... magazine fixed arrangement device, 22 ... snap ring insertion device, 23, 25 ... arcuate guide Face, 44
... insert head, P ... crankshaft support position

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23P 21/00 306 F16C 43/04

Claims (2)

(57) [Claims] 1. A method of assembling a split bearing, which is divided into two in a circumferential direction at a split surface along an axial direction, wherein one of the split bearing bodies is provided on a lower surface of a bearing assembly shaft supported substantially horizontally. Placing the bearing lifting member on the circular guide surface of the bearing and placing the circular guide surface of the ceiling guide on the upper side of the bearing assembly shaft; and placing the bearing split on the bearing lifting member on the two guide surfaces. Moving along the upper surface of the bearing mounting shaft and the ceiling guide, and after opening the bearing lifting member downward, dispose the other bearing split body on the lower surface of the bearing mounting shaft. And a method of assembling the split bearing. 2. An assembly device for a split bearing, which is divided into two in a circumferential direction at a split surface along an axial direction, wherein a shaft support mechanism for supporting a bearing assembly shaft substantially horizontally and a bearing split body are mounted. A bearing lifting member having an arcuate guide surface at the upper end and provided so as to be able to move up and down and disposing the bearing split body on a lower surface of the bearing assembly shaft, and having a downward arcuate guide surface and facing the bearing lifting member. A ceiling guide that covers over the bearing mounting shaft, and inversion that moves the bearing split on the bearing lifting member along the two guide surfaces to be positioned between the upper surface of the bearing mounting shaft and the ceiling guide. A split-type bearing assembling device provided with a device.