JPH10110810A - Lubricant leakage preventive structure for equipment and its demounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leakage of lubricating oil with certainty and improve operation efficiency by arranging caps on openings formed on a vessel main body, and forming an opening having a measurement suitable for discharging inner pressure in the main body to the outside. SOLUTION: Caps 30, 32 composing a lubricant leakage preventive structure are arranged on openings 22a, 22b of a differential case 10 in the state that a component such as a differential gear mechanism 18 is housed on a case body 12. A bottomed cylindrical part 36 is integrally arranged on an end of a fitting part 34 formed on an end of a widened flange 33 of the cap 30, whose diameter is decreased through a stepped portion. A hole 40 as an opening is formed on substantially a center portion of a bottom 38 of the cylindrical part 36. The measurement of the hole 40 is set so as to prevent dusts from entering the case body 12 from the outside, and discharge inner pressure to the outside for governing the pressure of the case body 12. It is thus possible to surely prevent leakage of lubricant charged in the case body 12 to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a lubricant from leaking out of a device having components inside a container-like main body and a device for removing the same.

[0002]

2. Description of the Related Art For example, in an engine assembly process of an automobile, devices such as a transmission case and a differential case are sub-assembled in individual processes (or factories) and then conveyed to a vehicle body assembling process to perform predetermined assembly. Work is taking place.

By the way, this type of differential case prevents dust from entering the inside and damage to the seal portion when it is conveyed from another process (or a factory) to a vehicle body assembling process, and at the same time, the interior lubricant is used. It is necessary to prevent outflow. For this reason, it is widely used that the differential case is placed on a dedicated pallet or a trolley and transferred to the vehicle body assembling process in a state where the synthetic resin cap is attached to the opening formed in the differential case main body. Is being done.

[0004]

However, in the above-mentioned differential case, the internal pressure in the main body is likely to increase due to vibration during transport, and particularly to changes in external temperature.
For this reason, there is a problem that the lubricant leaks out of the breather and the differential portion due to the pressure leak during the transportation before the vehicle body assembling process. This makes it difficult to maintain a certain amount of lubricant in the main body, and it is necessary to refill the lubricant only in a prescribed amount and perform various test measurements again, which considerably complicates the operation. The problem has been pointed out.

In addition, since the lubricant leaks out, various operations including the treatment of dirt on the transport trolley and the like are required, which causes a problem that the workability is remarkably deteriorated.

SUMMARY OF THE INVENTION The present invention solves this kind of problem, and has a very simple structure that reliably prevents the leakage of lubricant and facilitates efficient operation of equipment. An object of the present invention is to provide an agent leakage prevention structure.

It is another object of the present invention to provide a device for removing a lubricant leakage preventing structure of equipment which can remove a cap having an opening smoothly and securely without damaging it, and which can improve workability. And

[0008]

In order to solve the above-mentioned problems, according to the present invention, a cap member is mounted on an opening formed in a container-shaped main body, and the cap member is externally provided with the cap member. It has an opening set to prevent dust from entering the main body and to release internal pressure in the main body to the outside. Therefore, when the internal pressure in the main body increases due to vibration or external temperature change when the main body in which the component parts are installed and the lubricant is filled is conveyed,
The pressure inside the main body can be effectively adjusted through the opening.
This makes it possible to reliably prevent dust from entering the main body and leakage of the lubricant from inside the main body, and it is only necessary to adopt an extremely simple configuration in which an opening is provided in the cap.

Further, since the opening is constituted by a hole or a slit, the entry of dust can be prevented as much as possible.
In addition, since the hole or the slit is formed substantially at the center of the cap, it is possible to more reliably prevent the lubricant from leaking from the opening of the main body due to the tilt during transportation or handling. In order to effectively prevent dust from entering the main body and release internal pressure inside the main body,
It is preferable that the diameter of the hole is set in the range of 1.0 mm to 1.5 mm.

Further, according to the present invention, there is provided an adsorber for adsorbing and holding a cap under the action of a negative pressure source, and an auxiliary adsorber disposed inside the adsorber corresponding to the opening of the cap. Prepare. By closing the opening with the auxiliary suction disk by the urging means before the suction disk sucks the cap, the cap having the opening can be reliably sucked and held via the suction disk.

[0011]

FIG. 1 is a partial cross-sectional side view of a differential case 10 to which a lubricant leakage preventing structure according to an embodiment of the present invention is applied. The differential case 10 includes a case main body 12, and a differential gear mechanism 1 including a bevel gear 16 is provided in a chamber 14 in the case main body 12.
8 is rotatably mounted via bearings 20a and 20b. The case main body 12 has openings 22 a and 22 b on the axis of the differential gear mechanism 18.
The wheel drive shaft is connected to 2b in a vehicle body assembling step to be described later.

In the differential case 10, the components such as the differential gear mechanism 18 are housed in the case main body 12, and are transferred to the openings 22 a and 22 b in the course of being conveyed to a later vehicle body assembling step. The caps 30 and 32 constituting the lubricant leakage prevention structure according to the embodiment are mounted.

As shown in FIGS.
Is formed of a synthetic resin and has a hat-like shape. A fitting portion 34 inserted into the opening 22 a is provided at an end of the enlarged diameter flange portion 33. A cylindrical part 36 having a small diameter and having a small diameter is integrally connected to the end part via a step part. A hole 40 as an opening is formed substantially at the center of the bottom 38 of the cylindrical portion 36.

The hole 40 prevents dust from entering the case body 12 from the outside, and the case body 12
The internal pressure is set to a size that allows the internal pressure to be released to the outside in order to regulate the internal pressure. Specifically, the diameter of the hole 40 is 1.
It is preferable that it is in the range of 0 mm to 1.5 mm.

The cap 32 to be mounted on the opening 22b
Is configured in the same manner as the cap 30, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

As shown in FIG. 4, a roller conveyor 50 is provided as a transport line for transporting the differential case 10 to a vehicle body assembling step or the like. On the roller conveyor 50, the differential case 10 is mounted via a pallet 52. Is placed. On the downstream side of the roller conveyor 50, the cap removing device 6 according to the present embodiment is provided.
0 is provided.

As shown in FIGS. 4 and 5, the cap removing device 60 includes a pair of arms 62, 6 which can move in a vertical direction (arrow A direction) and a horizontal direction (arrow B direction).
At the lower ends of the arms 62 and 64, suction plates 66 and 68 for suction holding the caps 30 and 32 are attached so as to face each other. Adsorber 66, 6
Numeral 8 is connected to a negative pressure source (not shown) via conduits 70a and 70b.

As shown in FIG. 5, the suction plate 66 has a base portion 72 fixed to the lower end of the arm 62 and a cap portion 74, and the base portion 72 has an auxiliary suction plate 76
Are mounted so as to be able to advance and retreat in the direction of arrow B. Auxiliary suction disk 76
Has flexibility and is provided so as to surround the hole 40 of the cap 30.

The rod 78 supporting the auxiliary suction disk 76 is
This penetrates through the frame 80 fixed to the base 72 and
The stopper 82 is fixed to the end on the side. Auxiliary suction disk 76
Is held so as to protrude forward from the end face of the suction disk 66 via a spring (biasing means) 84 disposed around the rod 78. The projecting position of the auxiliary suction plate 76 is
Before the suction plate 66 sucks the cap 30, the auxiliary suction plate 76 is set to a position where the hole 40 of the cap 30 can be closed.

The suction plate 68 fixed to the arm 64 side includes
It is configured in the same manner as the suction disk 66 described above, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

Therefore, the differential gear mechanism 18 and the like are incorporated in the chamber 14 of the case
0 is assembled, the opening 2
2a and 22b are provided with caps 30 and 32 according to the present embodiment.
Is attached. This differential case 10 is arranged on a roller conveyor 50 via a pallet 52,
The roller is conveyed downstream by the roller conveyer 50, and is disposed corresponding to the cap removing device 60 immediately before the vehicle body assembling step.

In this case, the cap 3 according to the present embodiment
At 0 and 32, the hole 4 set to a predetermined size, for example, in a range of 1.0 mm to 1.5 mm, is formed in each bottom 38.
0 is formed. For this reason, when the internal pressure increases due to vibration during transportation of the differential case 10 or a change in the external temperature in the case body 12 filled with the lubricant, the pressure is externally applied from the respective holes 40 of the caps 30 and 32. After being released, the inside of the case main body 12 can be regulated to a constant internal pressure.

As a result, it is possible to reliably prevent the lubricant from leaking from the chamber 14 of the case body 12, and to prevent dust and the like from entering the chamber 14 from the outside as much as possible. There is an effect that can be. In particular, a very simple configuration in which the holes 40 are formed in the caps 30 and 32 is sufficient, and the entire structure for preventing leakage of the lubricant is simplified at a stroke.

The hole 40 is formed substantially at the center of the bottom 38. Therefore, the differential case 1
Even when the differential case 10 is tilted at the time of transporting or handling 0, it is possible to more reliably prevent the lubricant from leaking from the openings 22a and 22b.

In this embodiment, the caps 30, 3
2, the hole 40 is formed as an opening, but a slit may be provided instead.

When the differential case 10 is arranged corresponding to the cap removing device 60, the arms 62, 6 constituting the cap removing device 60 are provided.
4 move back and forth in the directions of arrows A and / or B, and the suction disks 66 and 68 provided at the lower ends thereof open the opening 22.
a, 22b are arranged corresponding to the caps 30, 32 attached thereto.

When the suction disk 66 is moved horizontally to the cap 30 side, first, the auxiliary suction disk 76 protruding forward from the front end face of the suction disk 66 comes into contact with the bottom 38 of the cap 30, and a spring is provided. It is deformed through the elastic force of 84 and comes into close contact with the bottom 38. Therefore, the hole 40 formed in the bottom 38 is completely closed by the auxiliary suction disk 76.

Next, when the peripheral portion of the cap portion 74 of the suction disk 66 comes into close contact with the large-diameter flange portion 33 of the cap 30, the negative pressure source (not shown) connected to the pipe 70a is driven, and the inside of the cap portion 74 is driven. Is in a negative pressure state. As a result, the cap 30 is sucked by the suction plate 66 and the opening 22 is sucked.
a, and the cap 30 is
Removed from a. Then, the arm 62 is moved in a direction away from the case main body 12, and after the cap 30 sucked and held by the suction board 66 is sufficiently separated from the opening 22a, the negative pressure of the suction board 66 is released. Thereby, the cap 30 is detached from the suction disk 66.
This cap 30 is reused as needed.

On the other hand, the suction plate 68 on the arm 64 side also holds the cap 32 attached to the opening 22b by suction while holding the hole 40 closed.
Remove from

The differential case 10 from which the caps 30 and 32 have been removed is transferred to a vehicle body assembling step (not shown) via a roller conveyor 50, and a predetermined assembling step is performed.

In this case, in the cap removal device 60, when the cap 30 is suction-held by the suction board 66, the hole 40 formed in the cap 30 is supported by a flexible auxiliary that is biased by the spring 84. The suction disk 76 is sufficiently closed. Thereby, the cap 30 is not affected by the presence of the hole 40 and the cap 30 is
6, automatic and reliable suction and holding can be performed to automatically take out from the opening 22a.

Therefore, the cap 3 has an extremely simple structure.
0 can be smoothly taken out from the opening 22a without damaging the cap 22. As a result, the cap removing operation can be easily automated, and the cap 30 can be repeatedly reused. In addition,
The removal operation of the cap 32 is performed smoothly and efficiently, similarly to the cap 30.

[0033]

As described above, in the lubricant leakage preventing structure for equipment according to the present invention, dust enters the body from the outside into the cap attached to the opening formed in the container-like body. Since the opening is set to a size capable of preventing the internal pressure inside the main body and releasing the internal pressure to the outside, the lubricant filled in the main body may leak to the outside due to an increase in the internal pressure. Can be reliably prevented. Moreover, it is only necessary to provide an opening in the cap, and the configuration of the entire structure for preventing leakage of the lubricant is simplified at a stroke.

Further, in the device for removing a lubricant leakage preventing structure of equipment according to the present invention, a flexible auxiliary suction disk is provided before the cap is suction-held by the suction disk under the action of the negative pressure source. Since the opening of the cap is closed by the urging means, the cap can be reliably held by suction via the suction disk. As a result, the cap having the opening can be automatically and reliably removed by the suction cup, simplifying the configuration of the entire apparatus, and making it possible to repeatedly reuse the cap without damaging the cap. .

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a differential case to which a lubricant leakage prevention structure according to an embodiment of the present invention is applied.

FIG. 2 is an explanatory perspective view of the differential case.

FIG. 3 is an explanatory perspective view of a cap constituting the lubricant leakage prevention structure.

FIG. 4 is a schematic configuration explanatory view of a device for removing a lubricant leakage prevention structure according to an embodiment of the present invention.

FIG. 5 is an enlarged explanatory view of a main part of the removal device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Differential case 12 ... Case main body 18 ... Differential gear mechanism 22a, 22
b ... opening 30, 32 ... cap 40 ... hole 60 ... cap removing device 62,64 ...
Arms 66, 68: suction plate 76: auxiliary suction plate 84: spring

Claims (5)

[Claims] 1. A lubricant leakage prevention structure for equipment in which components are housed in a container-shaped main body, comprising a hat-shaped cap attached to an opening formed in a part of the main body, The cap is formed of a synthetic resin, and is provided with an opening that is configured to prevent dust from entering the main body from the outside and to release internal pressure to the outside in order to regulate the inside of the main body. A structure for preventing lubricant leakage of equipment. 2. A structure according to claim 1, wherein said opening is a hole or a slit. 3. The structure according to claim 2, wherein said hole or said slit is formed at a substantially central portion of said cap. 4. The structure according to claim 2, wherein a diameter of said hole is set in a range of 1.0 mm to 1.5 mm. 5. An apparatus for removing a lubricant leakage prevention structure of equipment having components inside a container-like body from said body, said apparatus being attached to an opening formed in a part of said body. A suction cap for sucking and holding a cap-shaped cap having a lubricant leakage prevention structure under the action of a negative pressure source, and provided on the cap to prevent dust from entering the main body and to maintain the main body. A flexible auxiliary suction disk disposed inside the suction disk corresponding to an opening capable of releasing the internal pressure to the outside, and before the suction disk sucks the cap, the auxiliary suction disk A biasing means for biasing the auxiliary suction disc to close the opening, and a device for removing a lubricant leakage preventing structure of equipment.