JP2599752Y2 - Gear box with oil reservoir - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear box for holding a gear in a state of being immersed in an oil bath, for example, in a separator for separating can lids one by one from a row of many can lids closely aligned. It relates to a gear box.

[0002]

2. Description of the Related Art An example of such a separator is shown in FIG. In FIG. 4, reference numeral 1 denotes a gear box as a whole, and an opening 2 is formed in a side wall portion of the gear box. The opening 2 is formed in a liquid-tight manner on an outer surface of the side wall in which the opening 2 is formed. The bracket 3 is attached so as to close in a state. The bracket 3 is for holding the separator roll 4 and attaching it to the gear box 1. The bracket 3 includes an idle gear 5 and a driven gear 6 that meshes with the idle gear 5, and protrudes downward from the driven gear 6. Separator roll 4 on shaft (not shown)
Are mounted so that they rotate together. A drive gear (not shown) is provided inside the gear box 1.
And the idle gear 7 are accommodated. By meshing the idle gear 5 with the idle gear 7,
The separator roll 4 is rotated via these gears. Then, lubricating oil (not shown) is accommodated in the gear box 1 to such a depth that each gear is immersed.

[0003] The separator roll 4 needs to be replaced with a change in the diameter of the target can lid. However, if only the separator roll 4 is removed and attached, the workability is poor. Bracket 3 has been replaced. When the bracket 3 is removed, the opening 2 is completely opened, so it is necessary to remove or reduce the amount of oil in advance. Therefore, conventionally, a drain plug 8 is attached to a through hole (not shown) communicating with the inside of the gear box 1, and before removing the bracket 3, the drain plug 8 is pulled out and a valve or the like is attached thereto. The oil inside the gear box 1 is drained through a hose or a pump (not shown), and after the bracket 3 is replaced, the drain plug 8 is attached to the through hole.
A hose was inserted into the inside of the gearbox to inject oil with a pump or the like, or oil was injected into the gearbox from an oil pot.

[0004]

In the conventional gear box 1 described above, the drain plug 8 is provided. However, when draining oil, it is necessary to connect a valve or the like to the drain box after removing the drain plug 8. Yes, and when refilling oil, it is necessary to remove the valve etc. and attach the drain plug 8, and then insert the hose inside the gearbox 1 and fill the oil, or use the oil pot to fill the oil. Since it is necessary to inject oil, a considerable amount of oil may leak at this time and adhere to workers and surrounding equipment, and quick and troublesome work is required to minimize oil leakage. There were inconveniences such as being done.

The present invention has been made in view of the above circumstances, and has as its object to provide a gear box capable of easily removing and inserting oil temporarily when attaching and detaching a bracket.

[0006]

In order to achieve the above object, the present invention is characterized in that a cylinder having a built-in piston is provided so as to communicate with an oil bath. In this invention, the gear is housed in a state of being immersed in the oil bath, and an opening is formed with a lower end edge at a position lower than the oil surface level of the oil bath. In the gear box which is detachably attached, a cylinder communicating with the bottom of the oil bath is provided, and a piston for increasing or decreasing the volume of a portion communicating with the oil bath in the cylinder maintains a liquid-tight state in the cylinder. It is characterized by being inserted so as to move back and forth.

[0007]

In the gear box of the present invention, the internal gears are immersed in oil, and the oil level is set higher than the lower edge of the opening. Since the opening is closed, the oil level is maintained. When removing the bracket, the piston is moved inside the cylinder in a direction to remove the piston from the cylinder. As a result, since the volume of the part communicating with the oil bath in the cylinder increases, the oil inside the gear box is sucked into the cylinder. In this way, the bracket is attached and detached with the oil level lowered, and then the piston is returned to return the oil temporarily sucked into the cylinder to the inside of the gear box. That is, the temporary extraction and re-injection of the oil in the gear box can be performed simply by moving the piston.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an embodiment of the present invention. The gear box 10 shown here also has an opening 11 formed in the side wall thereof as in the prior art, and the opening 11 is closed. The bracket 12 is attached to the. The bracket 12 includes an idle gear 13 and a driven gear 14 that meshes with the idle gear 13. A shaft 15 to which the driven gear 14 is attached passes through the bracket 12 downward as shown in FIG. , A separator roll 16 is attached.

Another idle gear 17 meshing with the idle gear 13 is disposed inside the gear box 10. The idle gear 17 is attached to a drive shaft 18 extending from above the gear box 10. Drive gear 19 is engaged. The inside of the gear box 10 is an oil bath 20,
Oil 21 to a level higher than the lower edge of the opening 11
Are stored, and each gear is immersed in the oil 21.

A cylinder 22 is mounted on a side wall of the gear box 10 adjacent to the side wall on which the bracket 12 is mounted. FIG. 2 is a cross-sectional view showing the structure. A piston 23 slidingly contacting the inner peripheral surface of the cylinder 22 in a liquid-tight state is housed inside the cylinder 22 so as to be movable back and forth. A portion of the cylinder 22 on the front side (the right side in FIG. 3) of the piston 23 communicates with the oil bath 20 through a communication hole 24. A rod 25 extending rearward is attached to the piston 23. The rod 25 projects through an end plate 26 of the cylinder 22 to the outside, and a knob 27 is attached to a protruding end thereof. Further, a stopper plate 28 that moves back and forth in the radial direction of the rod 25 is attached to an outer surface side of the end plate 26, and the stopper plate 28 is formed in a groove 29 formed in the rod 25.
, The piston 23 is fixed at the forward end position. Note that the stroke amount of the piston 23 and the inner diameter of the cylinder 22 are different from those of the gear box 10 when the piston 23 is pulled almost to the retreat end.
The oil level is set such that the oil 21 is sucked until the oil level in the inside falls below the lower edge of the opening 11.

In the gear box 10 as well, in a normal use state, as shown in FIG. 3, the oil 21 is filled up to a position higher than the lower edge of the opening 11, and each gear is immersed in the oil 21. Has become. When replacing the separator roll 16 with the bracket 12, first, the stopper plate 28 is removed from the groove 29 of the rod 25 so that the piston 23 can be moved.
7, the rod 25 and the piston 23 are moved to the left in FIG. As a result, the volume of the front part of the piston 23 increases, so that the oil 21 inside the oil bath 20 is sucked into the cylinder 22 through the communication hole 24. When the piston 23 is fully retracted, a corresponding amount of oil 21 is sucked from the oil bath 20, so that the oil level in the oil bath 20 decreases, and finally falls below the lower edge of the opening 11. In this state, the bracket 12 is removed, and a new bracket 12 is attached to the side wall surface of the gear box 10. In this case, since the level of the oil 21 is lower than the lower end edge of the opening 11, no inconvenience such as leakage of the oil 21 occurs.

When the replacement of the bracket 12 is completed, the opening 1
When the knob 27 is pushed rightward in FIG. 2 after the valve 1 is closed, the piston 23 moves together with the rod 25, and the oil 21 sucked into the cylinder 22 is communicated with the communication hole 24.
From the oil bath 20. When the piston 23 moves to the forward end position, almost all of the oil 21 in the cylinder 22 is returned to the oil bath 20, and the oil level in the oil bath 20 is returned to the original height.
Then, the operation is completed by engaging the stopper plate 28 with the groove 29 of the rod 25 and stopping the movement of the rod 25.

[0013]

As is apparent from the above description, according to the present invention, in order to lower the oil level of the oil bath when replacing the bracket, the piston may be moved to suck the oil into the cylinder. Therefore, workability is significantly improved as compared with the related art, and unnecessary leakage of oil can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view mainly showing the cylinder and the piston.

FIG. 3 is a partial sectional view of an embodiment of the present invention.

FIG. 4 is a perspective view of a conventional gear box for a separator roll.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Gear box 11 Opening 12 Bracket 13, 14, 17, 19 Gear 20 Oil bath 21 Oil 22 Cylinder 23 Piston 24 Communication hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16H 57/04 B21D 51/26 B21D 51/30

Claims (1)

(57) [Scope of request for utility model registration] An opening formed at a lower edge of a position lower than the oil level of the oil bath, and a bracket is provided to close the opening in a liquid-tight manner. In the gear box, a cylinder communicating with the bottom of the oil bath is provided, and a piston for increasing or decreasing the volume of a portion communicating with the oil bath in the cylinder maintains a liquid-tight state in the cylinder. A gear box with an oil reservoir, which is inserted so as to move back and forth.