JP3058372B2 - Bearing cap splitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a splitting device in which, for example, a bearing cap, which is a component of an engine, is removed without tilting the bearing cap.

[0002]

2. Description of the Related Art Conventionally, a bearing cap for bearing a crankshaft of an automobile engine is fitted to, for example, a positioning pin of a cylinder block and fixed to the cylinder block by a plurality of bolts. As a device to divide the bearing cap in the state,
The present applicant has already proposed a detaching device such as Japanese Patent Publication No. 1-153234. This device has a plurality of nut runners capable of simultaneously loosening a plurality of bolts, and a plurality of holding claws for holding the bearing cap with a plurality of holding portions, in order to remove a bearing cap bolted to a predetermined position of the cylinder block. A pull-out means is provided for moving the holding claw in the dividing direction simultaneously with the loosening of the bolt, so that even if there is a difference in the loosening speed of each bolt by the nut runner, it is possible to always pull out while maintaining the posture of the bearing cap. I have to. In other words, the moving speed of each holding claw is adjusted by using the loosening force of each bolt, and the bearing cap is tilted at the time of division and prying between the positioning pins, or the inner surface of the bearing cap is damaged. I try to eliminate.

[0003]

However, in the above-described apparatus, the mechanism for transmitting the loosening force of the bolt to the holding claws tends to be complicated and costly, and the device must be pulled out according to the loosening force. Therefore, there is a problem that it is difficult to adjust the timing of pulling out.

[0004]

In order to solve the above problems, the present invention provides a bolt loosening means for loosening a bolt for fixing a bearing cap, and a holding means comprising a plurality of holding portions for holding a bearing cap. And a bearing cap splitting device provided with a pulling-out means for pulling out the bearing cap in the split direction, wherein the holding means comprises a plurality of openings of the bearing cap.
Comprising a plurality of hook members for holding penetrates into the withdrawal means, respectively to the rotary drive and the output shaft for moving the connected drawing direction of each to each of the plurality of hook members, each output shaft Each of the rotation driving members for vertically moving the hook member is provided, and the moving speed of each holding unit is synchronized with each of the output shafts.

[0005]

The operation of loosening the bolt and the operation of pulling out the bearing cap are separated, and after the bolt is loosened by the bolt loosening means, a plurality of holding means are formed in the opening of the bearing cap .
The hook member enters and holds the bearing cap.
Then, the bearing cap is moved in the pulling-out direction by the pulling-out means to divide the bearing cap. At this time, the output shafts respectively connected to the plurality of hook members are synchronized by the chain. Therefore, the rotation of the output shaft, that is, the movement speed of the holding portion is synchronized, and the bearing cap does not tilt. In addition, the use of such a chain simplifies the configuration of the tuning mechanism and allows the configuration to be inexpensive.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the bearing cap splitting device according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of the dividing device of the present invention, FIG. 2 is a side view of the dividing device, and FIG.
FIG. 4 is an enlarged sectional view of a part of FIG.

As shown in FIGS. 1 and 2, a bearing cap dividing device 1 of the present invention is fitted to a positioning pin of a cylinder block W1 and is stopped by a plurality of fixing bolts (vertical bolts in FIG. 1). Bearing cap W to be attached
2 is configured as a device for removing the cylinder block W1 from the cylinder block W1, and a bearing cap W2 positioned below the device.
Is pulled out directly above and divided from the cylinder block W1.

The dividing device 1 is connected to a top plate 2 provided at the upper part of the device, a lifting cylinder unit 3 provided at the center of the top plate 2, and a cylinder rod 4 of the lifting cylinder unit 3. A lifting body 5 is provided.
The lower end of the cylinder rod 4 is connected to the upper plate 6.

A lower end of a pair of guide rods 7 as shown in FIG. 2 is connected to the upper plate 6, and an upper extending portion of the guide rod 7 extends through the top plate 2 It is guided by a pair of guide members 8 provided at the upper part.

On the other hand, a nut runner holding plate 10 is provided at an intermediate portion of the lifting / lowering body 5.
And the upper plate 6 includes a plurality of prism members 1 provided at four corners and the like.
1 are integrated.

Between the upper plate 6 and the holding plate 10, a plurality of nut runners 12 as a part of the bolt loosening means A and a plurality of rotation driving members 13 as a part of the pulling means B are provided. On the other hand, below the holding plate 10, there are provided a bolt loosening means A, the rest of the pulling means B, and a holding means C for holding the bearing cap W2. Hereinafter, details of the means A, B, and C will be sequentially described.

The bolt loosening means A is provided with the nut runner 1
2, a slide plate 15 connected to the nut runner 12 via a constant velocity joint 14, and a plurality of sockets 16 provided below the slide plate 15. The interval between the plurality of sockets 16 in the width direction is , Slide plate 15 moving along guide plate 17
It can be adjusted freely.

That is, as shown in FIG. 3, an interval setting cylinder unit 18 is provided on the slide plate 15, and the operation of the cylinder unit 18 adjusts the interval between the sockets 16 in the width direction.

In the embodiment, the nut runners 12 and sockets 16 are arranged in two rows along the longitudinal direction of the cylinder block B, and a plurality of nut runners 12 and sockets 16 are provided in each row.

As shown in FIG. 3, the pull-out means B includes the rotary drive member 13, a drive shaft 20 as an output shaft connected to the lower end of the rotary drive member 13, and a joint 21 connected to the drive shaft 20. And an arm holding block 23 screwed into a threaded portion of the rod 22. A sprocket 24 is fitted to the drive shaft 20.

In the case of the embodiment, two such rotary driving members 13 are provided in the width direction of the cylinder block W1, and a pair of arm holding blocks 23 screwed to the threaded portions of the rods 22 are provided. A chain 25 is stretched between sprockets 24 fitted to each drive shaft 20.

The periphery of each sprocket 24 is surrounded by a chain case 26. A pair of guide bars 28a, 28b as shown in FIG. 4 is fixed to the bottom plate 27 of the chain case 26. The guide bars 28a, 28b are fixed to the reference block 31 and the fixed block fixed below the bottom plate 27. The lower end of the guide bar 28a on one side slides into the guide hole of the arm holding block 23, and the guide bar 28b on the other side The guide hole 23 is slidably penetrated and extends further downward so that the lower end thereof can contact the upper surface of the cylinder block W1. That is, it also serves as a work fixing bar.

The fixed block 30 has the rod 2
A ball bearing 32 for rotatably supporting the bearing 2 is provided.

With the structure of the pulling means B, when each rod 22 rotates, each arm holding block 23
Can be moved up and down. At this time, a chain 25 spanned between the sprockets 24
The rotation of each rod 22, that is, the vertical movement of the arm holding block 23 is synchronized.

Next, the holding means C will be described.

As shown in FIG. 4, the holding means C includes a rotating rod 33 inserted rotatably along the longitudinal direction of the arm holding block 23, and respective arms 34 attached to the front and rear ends of the rotating rod 33. And the rotating rod 33
Are provided on both left and right sides along the longitudinal direction.

The left and right rotating rods 33 have
A cylinder unit 35 for swinging and driving the arm 34 is provided in the vicinity of the arm 34 on one side.
3 is connected to a lower end of the arm 34 via a link plate 37 while being pivotally attached to the pin 3.
That is, the operation of the cylinder unit 35 causes the arm 34 to swing in the left-right width direction, and the rotation of the rotating rod 33 accompanying this causes the arm 34 at the other end to swing simultaneously.

In the case of the embodiment, such a cylinder unit 35 is provided on the right-hand side rotating rod 33 in FIG. 1 on the near side of the drawing, and the left-hand rotating rod 33 is provided on the far side of the drawing.

At the lower end of the arm 34, a stepped hook member 38 is provided as a holding portion. The hook member 38 enters the openings formed on both side surfaces of the bearing cap W2 to hold the bearing cap W2, but the stepped shape corresponds to, for example, a change in the type of work to be handled. That's why.

Further, a guide bracket 40 is provided near a predetermined arm 34 in order to smooth the swing of the arm 34. The guide bracket 40 is fixed to the lower end of the arm holding block 23 as shown in FIG. 4 and has an elongated hole 41 as shown in FIG.
The guide pin 42 engaged in the elongated hole 41 can be guided.

That is, the guide pin 42 is
The guide pin 42 is guided by the elongated hole 41 when the arm 34 swings. In addition, as shown in FIGS. 1 and 3, each proximity switch 43 for detecting the position of each arm holding block 23 is provided on each bracket 44.

The operation of the dividing device 1 configured as described above will be described.

When the cylinder block W1 to which the bearing cap W2 is attached is positioned below the dividing device 1 in the posture shown in FIG. 1, the lifting cylinder unit 3 operates to lower the lifting body 5. Come. The lower end of the guide bar 28b abuts on the upper surface of the cylinder block W1 to fix and position the socket. Each socket 16 is fitted to a fixing bolt, and the bolt is loosened by the rotation of the nut runner 12.

At this time, the lower end of each arm 34 is closed by the operation of the cylinder unit 35, and the hook member 38 enters and holds the side opening of the bearing cap W2.

When all the bolts are loosened, the rotation driving member 13 operates to rotate each rod 22 and move each arm holding block 23 screwed to the threaded portion of the rod 22 upward. That is, the cylinder block W1 and the bearing cap W2 are divided.

At this time, the sprocket 2 of the drive shaft 20
The rotation of the two drive shafts 20 is tuned by the action of the chain 25 bridged over the shaft 4, and the bearing cap W2 is pulled out directly without tilting.

That is, for example, even when the weight of the bearing cap W2 is not symmetrical, the posture of the bearing cap W2 when detaching from the positioning pin of the cylinder block W1 is maintained, and the bearing cap W2 is prying with the positioning pin or No defects such as scratches on the inner surface of the bearing cap. Further, the accuracy of the left and right rotary driving members 13 can be absorbed by the chain 25 without having to adjust the accuracy so strictly.

[0033]

As described above, the dividing device according to the present invention is extremely simple by separating the operation of loosening the bolts for fixing the bearing caps and the operation of the dividing movement, and extending the chain around the output shaft for the dividing movement. With such a configuration, the bearing cap can be divided while maintaining the posture of the bearing cap. or,
Even if the left and right weights are unbalanced depending on the type of bearing cap to be handled, it can be handled without any change on the device side, and the accuracy of multiple drive units for moving each holding unit There is no need to precisely adjust.

[Brief description of the drawings]

FIG. 1 is a front view of a dividing device according to the present invention.

FIG. 2 is a side view of the dividing device.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is an enlarged sectional view of a part of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bearing cap splitting device 12 Nut runner 13 Rotation drive member 20 Drive shaft 24 Sprocket 25 Chain 34 Arm 38 Hook member A Bolt loosening means B Pulling out means C Holding means W2 Bearing cap

Claims (1)

(57) [Claims] 1. A bearing comprising: bolt loosening means for loosening a bolt for fixing a bearing cap; holding means having a plurality of holding portions for holding the bearing cap; and pulling means for pulling out the bearing cap in a dividing direction. In the cap dividing device, the holding means may include a plurality of openings of the bearing cap.
A plurality of hook members that enter and hold the portion, the pull-out means is connected to each of the plurality of hook members , and each output shaft for moving in each pull-out direction;
A rotation drive member for rotating and driving each output shaft to move each hook member up and down is provided, and a chain for adjusting a moving speed of each holding unit is bridged between the output shafts. Bearing cap splitting device.