JPH01153234A - Bearing cap remover - Google Patents

Abstract

PURPOSE:To remove a bearing cap smoothly by causing a force for axially and displaceably loosening a bearing bolt to act on a pair of bearing cap holding means engaging the bearing cap through a support means. CONSTITUTION:A bearing cap remover 1 is provided with a plurality of nut runners 6,... for loosening bearing bolts relative to a cylinder block CB on a mounting bed 5, a pair of holding claws 34, 34 engaging the left and right edges of bearing cap C, neutral cylinders 39, 39 for vertically moving these holding claws 34, 34 in the opposite direction to each other, a horizontal cylinder 44 for moving these holding claws 34, 34 away from and close to each other, a shaft 24 for supporting the holding claws 34, 34 and transmitting an amount of looseness of bearing bolts B there to and a slide plate 9. Thus, the bearing cap C can be removed by the nut runners 6,... while the bearing cap C can be always horizontally removed by its own stability or by a forcible force of a coupling means even if the respective bearing bolts differ in the amount of looseness thereof.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a bearing cap removal device.

(Prior art) For example, in order to remove a bearing cap that supports a crankshaft from a cylinder block during the manufacturing process, a half-moon-shaped shaft divided into two parts is inserted into the journal part, and a force such as hydraulic pressure is applied to this shaft. I was trying to pull out the bearing cap. However, with this extraction method,
It is very difficult to pull out the temporarily fixed bearing and cap straight, and the bearing cap may tilt and apply a prying effect to the positioning pin, or foreign matter may adhere to the bearing cap that may damage the arcuate inner surface of the bearing cap. Therefore, there was a problem that the basic performance of the engine was impaired.

In order to solve this problem, the device disclosed in Japanese Utility Model Publication No. 60-22233 applies a pressing force in the opposite direction to the pulling direction with a force weaker than the pulling force on the upper surface of the cap when the bearing cap is pulled out. However, this not only necessitates a significantly larger pullout force, which not only leads to an increase in the size of the device, but also causes unnecessary contact pressure to be applied to the bearing surface, resulting in damage to the bearing. This will have an unfavorable effect on the cap.

(Purpose) The present invention was made in view of the above-mentioned problems, and its purpose is to provide a new device that allows the bearing cap to be easily removed by using the loosening force of the bearing bolt. It's about doing.

(Means for Achieving the Object) That is, the present invention provides a bearing cap removing device for achieving the above object, which includes a driving means that engages with a bearing bolt and rotates the bolt in a direction to loosen it, and a bearing cap removing device. at least one pair of bearing cap holding means that engages with a portion of the bearing cap, and two bearing ports that swingably support the pair of bearing cap holding means and are disposed apart from each other and are loosened and displaced in the axial direction. It is constructed of a swingable supporting means that can be pushed up, and a means that connects a pair of bearing cap holding means so that they interlock in opposite directions.

(Example) The details of the present invention will be described below based on illustrated examples.

The drawings show one embodiment of the present invention.
To explain the outline of this device using the diagram, the bearing cap removal device is attached to a fixed plate 3 that is moved up and down by a main cylinder 2, and is attached to a cylinder block C.
A plurality of nut runners 6 and 6 are positioned above the conveyor 4 that conveys B, and loosen the bearing bolts 88 of the cylinder block CB on the stand 5 that has been conveyed here.
..., a pair of holding claws 34.34 that lock onto the left and right edges of the bearing cap C, a neutral cylinder 39.39 that moves these holding claws 34.34 up and down in opposite directions, and a neutral cylinder 39.39 that moves these holding claws up and down in opposite directions. It is composed of a horizontal cylinder 44 that moves the pawls 34, 34 toward each other, a shaft 24 that supports these holding pawls 34, 34, and transmits the amount of slack in the bearing port B to them, and a sliding plate 9.

Next, the details of this device] will be explained with reference to Fig. 1.2. The nut runners 6... are arranged in such a way that they are arranged in a manner corresponding to the position and number of the plurality of bearing bolts B... that fix the bearing cap C. Four nut runners 6L and 6R are fixed on the fixed plate 3 and arranged in the center of these nut runners 6 (in Figure 1, only the left and right nut runners 6L and 6 are visible). The bearing caps C are configured to participate in the removal of the bearing cap C through the sockets 7L and 7 provided at the lower ends of the respective bearing caps.

On the other hand, the sliding plate 9 is formed as an elongated plate extending perpendicularly to the axis of the bearing cap C, and has tapered heads 10 fixed to both lower surfaces of the fixed plate 3.
A permanently compressed spring 12 is attached to the shaft 11.11 having a
．． The drawer is slidably supported so that it will not fall under a pressing force of 12.

The support bracket 16 is suspended from the lower surface of the sliding plate 9 with bolts 17, and has two downwardly trowel-shaped legs parallel to the longitudinal direction of the sliding plate 9 provided at its lower end. Between 18 and 18, as shown in FIG. The rotary block 20 is rotatably mounted around an axis parallel to the rotary block 20, and a shaft 24 that supports a holding claw 34 and an oval plate 26, which will be described later, is inserted through a hole 23 roughly formed in the rotary block 20.

That is, on the shaft 24 inserted through the rotation block 20, there are oval action plates 27 on both sides of the support bracket 16, and a sleeve 28 27R is integrated therewith.
．． 28, and at both ends of this shaft 240 there are positioning pins 31, 31 that engage with the keyway 25.
The support tubes 32.32 are axially slidably and non-rotatably mounted through the support tubes 32.32.
The left and right retaining claws 34 and 34R are attached,
When the respective sockets 7L and 7 located below through the insertion holes 29 and 29 of the working plates 27L and 27R rise due to the rotation of the bearing bolts B and B in the loosening direction,
The shaft 24 pushed up by these via the action plates 27L and 27Ra raises the sliding plate 9 via the block 2o and the support bracket 16, and pulls the holding claws 34L and 34R on the support cylinder 32.32. It is configured to rise.

On the other hand, the left and right holding claws 34L and 34R attached to both ends of the shaft 24 via the support cylinders 32 and 32 are, as shown in FIG. 34L, and one and two inward claw pieces 35 provided at each lower end thereof (configured to hold the edge of the bearing carrier C, and each of these upper ends is configured to engage with the lower surface of the sliding plate 9 via neutral cylinders 39, 39, which will be described later.

On the other hand, the above-mentioned neutral cylinders 39L, 39R are a pair of cylinder mechanisms in which the upper and lower chambers are communicated with each other via the pipes 4o, 40 in order to move both the holding claws 34L, 34R1 up and down equally in opposite directions. Each of these neutral cylinders 39L, 39R is fitted into a guide groove 13.13 provided on the lower surface of the sliding plate 9 via a rod 45.45 fixed on the upper surface thereof.
．． The neutral cylinders 39L and 39R are attached to each rod of the piston 41 so as to be slidably inserted therein. The retaining claws 34L and 34R are integrally connected to the upper ends of the retaining claws 34L and 34R via nuts 43 and 42 through nuts 43 and 43, respectively.

Next, the operation for removing the bearing cap C using the above-mentioned device will be explained.

First, when the cylinder block CB fixed in the R position on the mounting table 5 is sent directly below the bearing cap removal device 1 by the transport conveyor 4, the horizontal cylinder 46 extends the rod and locks the left and right holding claws 34L, 34R is expanded to the position indicated by the two-dot chain line in FIG. Then, when the retaining claws 34L, 34 days, and the winter melon 35... reach the edge of the bearing cap C, the horizontal cylinder 46 moves the left and right retaining claws 34L, 34 days close together, and the tip claws Pieces 35... are positioned below the edge of the bearing cap C.

Due to this engagement operation, the plurality of nut runners 6 on the fixed plate 3 are connected to the sockets 7 at the lower end, respectively.
・ are fitted to each bearing bolt B of the bearing cap C, and then each bearing bolt B is loosened using these nut runners 6, as shown in Fig. 6. The four sockets 7L and 7th located in the center are as follows.
The upper surfaces of the bearing bolts B rise together with the left and right action plates 27, push up the left and right action plates 27R, and through the shaft 24 roughly inserted into the rotation block 20, the left and right retaining claws 34L and 34 Pull up and tighten the claw 35 at the bottom end.
... is brought into contact with the edge of the bearing cap C, and at the same time, while raising the sliding brake 9 via the support bracket 16, remove the bearing cap Ct from above the cylinder block CB.

By the way, the above is an explanation of the normal removal operation when each bearing bolt B... is loosened equally, but the bearing bolts B in the horizontal and axial directions of the bearing cap C
Each operation when ... is loosened unevenly will be explained below.

Now, if the right bearing bolt BR of the left and right bearing bolts B, B located on both sides of the bearing cap C has been loosened earlier, as shown in Fig. 7, the right socket Only 7B rises with bolt rotation B,
The shaft 24 is pushed upward to the right via the action plate 27R directly above it, and the right-hand mold holding claw 35 attached to the right end of the shaft 24 is engaged with the edge of the bearing cap C, while supporting The sliding plate 9 pushed up via the bracket] 6 pulls up the right neutral cylinder 39R. Therefore, the piston 41 inserted here is relatively lowered within the cylinder 39R, causing the liquid in the lower chamber to flow into the lower chamber of the left neutral cylinder 39L through the pipe 40, and with this liquid pressure, the piston 41 to engage the left edge of the bearing cap C with the claws 35 and 35 of the left holding claw 34L, which is integral with the left holding claw 34L. In this state, when the left bearing bolt B, which has been delayed, begins to loosen, the left socket 7L, which has risen accordingly, pushes up the left action plate 27L, and horizontally separates the bearing cap C.

On the other hand, bearing ports B arranged in the axial direction of the bearing cap C,
If, for example, one of the bearing bolts 8Lf on the A-type retaining claw 34L side of B loosens earlier and the bearing cap C begins to tilt forward and backward, as shown in FIG. 34L receives a pulling force while rotating counterclockwise toward the edge of the bearing cap C that does not loosen, so its own restoring force works to pull up the lower bearing cap C tightening. Remove it while correcting it horizontally.

In addition, the above is from cylinder block CB to bearing cap C.
The present invention has been explained by way of an example of removal, but 1.
It goes without saying that the present invention can also be applied to the case of removing a bearing cap from a general bearing.

(Effects) As described above, according to the present invention, since the axial loosening displacement force of the bearing bolt is applied to the pair of bearing cap holding means that engage with the bearing cap via the supporting means, the bearing The bearing cap can be removed using the driving force of the driving means for loosening the bolt, and the mounting M can be greatly simplified by eliminating the need for a driving mechanism for removing the bearing cap. Moreover, the supporting means that is pushed up by the loosening displacement force of the bearing bolt is swingably disposed, and a pair of bearing cap holding means are swingably supported on this supporting means, and these holding means are mutually supported. Since they are connected in such a way that they interlock in opposite directions, even if there is a difference in the amount of slack between the bearing ports arranged in the axial and radial directions, the bearing cap can be fixed by its own restoring force or by the force of the connecting means. It is possible to always remove the bearing in a horizontal state, thereby preventing deformation of the bearing bolt and damage to the inner surface of the bearing, which are likely to occur during removal.

[Brief explanation of the drawing]

Fig. 1 is a side view of a drawing showing an embodiment of the present invention, Fig. 2 is a plan view showing the main parts of the same device, Fig. 3 is a side view showing the entire snow making device, and Fig. 4 is a side view showing the main parts of the same device. The figure is a cross-sectional view of the rotating block.
Figure 5 (aXb) is a plan view of each holding claw, Figures 6 to 8.
The figures are diagrams showing various states in which the bearing cap is removed. 3... Fixed plate 6... Nut runner 7... Socket 9... Sliding plate 16... Support bracket 20... Rotating block 24... Shaft 27 ... Action plate 34 ... Holding claw 39 ... Neutral cylinder 46 ... Horizontal cylinder B ... Bearing bolt C ... Bearing cap CB ... Cylinder block

Claims (1)

[Claims] A drive means that engages with a bearing bolt and rotates the bolt in a direction to loosen it, at least a pair of bearing cap holding means that engages with a portion of the bearing cap, and swingably supports the pair of bearing cap holding means. and a swingable supporting means that is pushed up by contact with the two bearing bolts arranged apart from each other and loosened in the axial direction, and the pair of bearing cap holding means are interlocked in opposite directions. A bearing cap removal device comprising means for coupling.