JPH06159518A - Oil seal incorporating device - Google Patents

Abstract

PURPOSE:To eliminate a press fitting failure and to improve workability by positioning a fixed holder to hold an oil seal onan end face of a crankshaft, moving a liquid cylinder in the state where it is fixed with a setting bolt and detecting the direction of the oil seal through a sensor of a sliding holder. CONSTITUTION:In case of engaging an oil seal 6 with a crankshaft 3 of an internal combustion engine, after previously fitting the oil seal 6 on a fixed holder 9 at first, a positioning pin 9a is introduced to a positioning hole 4 of the crankshaft 3, and by fastening a setting bolt 8 screwed in a setting screw hole 5, the fixed holder 9 is fixed on the end face of the crankshaft 3. Thereafter, a starting button of an operation box is pressed, and when a seating confirmation sensor 12 and an oil seal direction sensor 15 respectively output signals to show normality, pressure oil is introduced to a pressure oil cylinder 11 by way of changing over a solenoid valve, and by moving a sliding holder 7, the oil seal 6 is press fit between a flywheel housing 2 and the crankshaft 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil seal for preventing the leakage of oil to the outside from between a shaft such as a crankshaft of an internal combustion engine and a member provided with the shaft of the engine. The present invention relates to an oil seal assembling device for fitting into an oil seal.

[0002]

2. Description of the Related Art A conventional crankshaft portion of an internal combustion engine and a manual oil seal assembling device for fitting an oil seal into the crankshaft portion are shown in FIGS. 4 and 5, which will be described below.

As shown in FIG. 4, an end surface of a crankshaft 3 protruding into a flywheel housing 2 for transmitting rotation of an engine 1 which is an internal combustion engine to the outside,
A positioning hole 4 is formed at the center of the hole, and a plurality of set screw holes 5 are formed on a concentric circle on the outer periphery of the positioning hole 4.

An oil seal 6 for assembling the oil seal 6 for preventing oil leakage in the engine 1 from between the crankshaft 3 and the flywheel housing 2 is attached to the slide holder 7 of the assembling device A. In order to fit the seal 6 into the crankshaft 3, a cylindrical pressing portion 7a that presses the seal 6 is formed.

Further, the slide holder 7 is provided with a plurality of through holes 7b through which set bolts 8 which are screwed into the set screw holes 5 of the crankshaft 3 penetrate and which are slidable. .

A fixed holder 9 having a positioning pin 9a fitted in the positioning hole 4 has a disk portion 9b sandwiched between the flange portion 8a provided on the set bolt 8 and the end surface of the crankshaft 3. The shaft portion 9c is slidably and rotatably pierced through the center hole 7c of the slide holder 7, and the fixed surface 9d at the end thereof is brought into contact with the cam surface 7d of the slide holder 7, and Handle 1
0 is attached.

In this oil seal built-in device, the positioning pin 9a of the fixed holder 9 is inserted into the positioning hole 4 of the crankshaft 3, and the set bolt 8 inserted into the sliding hole 7b of the sliding holder 7 is inserted into the crankshaft 3. Set screw hole 5
Then, the disc portion 9b of the fixed holder 9 is attached between the flange portion 8a and the end surface of the crankshaft 3.

Then, with the pressing portion 7a of the sliding holder 7 in contact with the oil seal 6 previously fitted to the crankshaft 3, the handle 10 is rotated in the direction of the arrow in FIG. The surface 9d pushes the cam surface 7d to move the slide holder 7 toward the crankshaft 3.

By this movement, the oil seal 6 is pushed by the pushing surface 7a and is pushed between the crankshaft 3 and the flywheel housing 2, and the gap is sealed to prevent oil leakage from the engine 1. Is.

[0010]

A cross section of such an oil seal is shown in FIG. 6. The oil seal 6 has an opening 6a formed on one surface side, and the opening 6a faces the inside of the engine. Should be set as.

However, the oil seal 6 can be inserted between the crankshaft 3 and the flywheel housing 2 even if the front and rear directions are reversed, and oil leakage can be prevented by inserting the oil seal 6 in such a reverse state. Can not.

Further, the driving depth into which the oil seal 6 is inserted is not constant due to variations in the operating angle of the rotation of the handle 10 by the operator or the like, and oblique driving in which the oil seal is driven diagonally occurs. There was a risk of oil leakage due to improper installation of the oil seal.

The present invention solves the above-mentioned problems of the conventional oil seal assembling device, eliminates the variation in the press-fitting depth of the oil seal, oblique press-fitting, and reverse assembling, and improves the workability. To aim.

[0014]

According to the present invention, a cylindrical slide holder for moving an oil seal is provided on an outer peripheral portion of a cylindrical fixed holder for holding an oil seal, and a front portion of the fixed holder is provided. A positioning pin that engages with the positioning groove in the center of the shaft is provided, and a set bolt that engages with the set screw hole of the shaft is passed through the sliding holder at the position on the outer periphery where the positioning pin of the fixed holder is provided. A fluid cylinder for moving the sliding holder between the rear surface of the fixed holder and the inner wall surface of the sliding holder, and an oil seal direction sensor on the front surface of the sliding holder. To do.

[0015]

In the oil seal built-in device of the present invention, the positioning pin on the fixed holder side is engaged with the positioning groove of the crankshaft, and the set screw on the fixed holder side is screwed into the set screw hole to set and fix the fixed holder. Then, the fixed holder is accurately positioned and fixed to the shaft.

By detecting the orientation of the oil seal with an oil seal direction sensor provided on the front surface of the sliding holder, reverse installation is prevented. In addition, the sliding holder provided on the outer periphery of the fixed holder that is accurately positioned and fixed,
By moving a predetermined amount by the fluid cylinder, the oil seal can be assembled at a constant press-fitting depth, and automatic assembling, variation in the press-fitting depth, and oblique press-fitting can be eliminated, and workability can be improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 as to an embodiment including a control means for controlling an oil seal incorporating device of the present invention. The same parts as those in the conventional example are designated by the same reference numerals.

As shown in FIG. 1, the oil seal built-in apparatus of this embodiment is provided with a hydraulic cylinder 11 on the back side of a fixed holder 9 having the same diameter as the outer diameter of the crankshaft 3 and at the outer circumference. The oil seal 6 can be fitted in advance.

The fixed holder 9 is provided with a positioning pin 9a fitted into the positioning hole 4 on one surface thereof, and the surface of the fixed holder 9 is set on the crankshaft 3 by being pushed by the crankshaft 3. A seating confirmation sensor 12 that detects completion is provided.

The sliding holder 7 which slides on the outer periphery of the fixed holder 9 is provided with a pressing portion 7a for pressing the oil seal 6 fitted in the fixed holder 9 and slides in the hydraulic cylinder 11. The piston 13 is provided on the inner wall surface of the slide holder 7, and the hydraulic cylinder 11
A pressing spring 14 is mounted between the slide holder 7 and the slide holder 7.

The pressing portion 7a of the sliding holder 7 has
When the opening 6a of the oil seal 6 is set on the pressing portion 7a side, it is not pressed by the opening 6a, and when it is set correctly, it is pressed by the surface opposite to the opening 6a of the oil seal 6. As a result, an oil seal direction sensor 15 that detects that the oil seal is set in the correct direction is provided.

This oil seal built-in device is controlled by the control means shown in FIG. 2, and the pressure is reduced by the pressure reducing valve 23 into which high pressure air is introduced from the air tank 20 via the electromagnetic valve 21 and the air filter 22. After that, it is introduced through a lubricator 24 into a solenoid valve 26 that controls the operating direction of a direct pressure booster 25 that converts the oil pressure.

The high pressure oil boosted by the direct pressure booster 25 operated by the operation of the solenoid valve 26 is supplied to the variable throttle valve 2
It is introduced into the hydraulic cylinder 11 via 7 and operates the slide holder 7 in the direction of the arrow in FIG.

A control device 30 to which the detection outputs of the oil seal direction sensor 15 and the seating confirmation sensor 12 are input.
An abnormal patrol light 31 indicating an abnormality is installed in the vehicle, and an operation box 35 provided with a start button 32 for controlling the operation of the solenoid valve 26, an emergency button 33, and a press-fitting completion lamp 34 is connected to the abnormal box light 31. Is.

The operation of this oil seal incorporating device is carried out according to the flow chart shown in FIG. 3. As in step S1, the oil seal 6 is first fitted in advance to the fixed holder 9, and then the oil seal assembling is performed. The process of step S2 for attaching the insertion device to the crankshaft 3 is started.

In this step, after the positioning pin 9a is inserted into the positioning hole 4 of the crankshaft 3 for positioning, the set bolt 8 penetrating the fixed holder 9 is screwed into the set screw hole 5 of the crankshaft 3, The fixed holder 9 is fastened to the end surface of the crankshaft 3 by the collar portion 8a of the set bolt 8.

After the work of step S2 is completed, when the start button 32 of the operation box 35 is pressed in step S3, it is determined in step S4 whether or not the seating confirmation sensor 12 is properly installed in the oil seal incorporating device. Is determined.

In this judgment, if the seating confirmation sensor 12 is not pushed by the crankshaft 3 and the completion of the setting of the oil seal incorporating device on the crankshaft 3 is not confirmed, the operation instruction of the solenoid valve 26 is given. Since it is not performed and the abnormal warning light 31 is turned on, the work of step S2 is redone as step S5.

However, the oil seal built-in device is correctly attached to the crankshaft 3, and the seating confirmation sensor 1
When 2 is pushed by the crankshaft 3, the process proceeds to step S6, and the direction of the oil seal 6 in which the oil seal direction sensor 15 is fitted as described above is correct,
Whether or not it is detected.

If it is determined by this detection that the oil seal 6 is set in the opposite direction, the solenoid valve 26 is not operated and the abnormal patrol light 31 is turned on.
In step S7, the oil seal 6 is set on the fixed holder 9 again.

However, when the oil seal 6 is correctly set and the oil seal direction sensor 15 detects it, the process proceeds to step S8, the solenoid valve 26 is operated, and the direct pressure booster 25 is operated at a high pressure. High pressure air is introduced into the air cylinder of the direct pressure booster 25 on the side that can send oil,
High-pressure oil is introduced into the hydraulic cylinder 11.

With this introduction, the slide holder 7 moves in the direction of the arrow in FIG.
Press to press the oil seal 6 between the flywheel housing 2 and the crankshaft 3 to prevent oil leakage from this space.

When the oil seal 6 is completely assembled, the press-fitting completion lamp 34 is turned on by detecting the completion of the operation of the hydraulic cylinder 11 in step S9, and the controller 30 commands the solenoid valve 26. hand,
This is operated in the opposite direction, high pressure air is introduced to the side of the air cylinder of the direct pressure booster 25 opposite to the above, and the direct pressure booster 25
Operates in the reverse direction to discharge the hydraulic pressure in the hydraulic cylinder 11.

Then, the piston 13 and the hydraulic cylinder 11
2 is moved in the direction opposite to the arrow in FIG. 2 by the urging force of the pressing spring 14, and the pressing portion 7a of the sliding holder 7 is separated from the oil seal 6.

After the completion of press-fitting of the oil seal 6 is known by turning on the press-fitting completion lamp 34, step S1
The set bolt 0 is pulled out from the set screw hole 4 of the crankshaft 3, and the oil seal assembly device is removed from the crankshaft 3.

[0036]

As described above, according to the present invention, since the oil seal is press-fitted into the shaft by a fluid cylinder such as a hydraulic cylinder, the stroke of the fluid cylinder is constant. Is performed up to a certain position from the end surface of the shaft, so that there is no variation in the press-fitting depth.

Further, since the oil seal direction sensor for detecting the direction of the oil seal is provided on the front portion of the sliding holder which is in contact with the oil seal, it is possible to prevent the oil seal from being pressed in reversely. You can remove the oil seal to eliminate the hassle of pressing it in again.

Further, unlike the case where this press-fitting is artificially performed, the force for tilting the slide holder is not generated, so that the oblique press-fitting of the oil seal can be prevented, and the press-fitting can be performed by the fluid cylinder, so that workability is improved. It is possible to improve and to eliminate the risk of oil leakage.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of implementation of the present invention.

FIG. 2 is a block diagram of an apparatus including a control means for controlling the same.

FIG. 3 is a flowchart of a control means of the above.

FIG. 4 is a perspective view of a crankshaft portion of an engine and a conventional oil seal assembly device in which an oil seal is press-fitted therein.

FIG. 5 is a cross-sectional view of the above oil seal incorporating device.

FIG. 6 is a sectional view of an oil seal.

[Explanation of symbols]

 3 Crankshaft 4 Positioning hole 5 Set screw hole 6 Oil seal 7 Sliding holder 7a Pressing part (front part) 8 Set bolt 9 Fixed holder 9a Positioning pin 11 Hydraulic cylinder 13 Piston 15 Oil seal direction sensor

Claims (1)

[Claims] 1. A cylindrical sliding holder for moving an oil seal is provided on an outer peripheral portion of a cylindrical fixed holder for holding an oil seal, and a front surface of the fixed holder is engaged with a positioning groove at the center of the shaft. In addition to providing the positioning pin for the fixing holder, a set bolt that engages with the set screw hole of the shaft is arranged at the position of the outer periphery where the positioning pin of the fixing holder is provided, penetrating the sliding holder. An oil seal built-in device characterized in that a fluid cylinder for moving the slide holder is provided between the rear surface portion and the inner wall surface of the slide holder, and an oil seal direction sensor is provided on the front surface portion of the slide holder.