JPS5813200Y2 - Oil level adjustment device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an oil level adjustment device for maintaining the height of the lower oil level within a certain range in a case having two different oil levels in a lubrication system. .

For example, as shown in Fig. 2, a chain case 10 is attached to a gear case 11 that also serves as a tank, and oil is sucked up from inside these cases by an oil pump 15, and the pressurized oil is used to connect a chain 16 and a torque converter that require lubrication. In a lubrication system in which the used oil is returned to the chain case 10 and gear case 11 after being supplied to the chain case 10, 17, etc., there is a difference in the height of the oil levels 13, 14 in the case 10, 11, and It becomes necessary to maintain the height of the lower oil level 13 within a certain range.

In the illustrated example, if the chain 16 is immersed in more than a predetermined amount of oil, oil consumption, oil deterioration, power loss, etc. will increase.On the other hand, if the oil level 13 is too low, lubrication failure will occur and the chain Because of the increased wear and tear on the oil level 13, its height range must be adjusted relatively precisely.

If the gear case 11 is lower than the chain case 10, is it possible to maintain the oil level 13 at a predetermined level by providing a suitable weir? Q: If the chain case 10 is relatively low, it is difficult to adjust the oil level.

In the present invention, a float 2 is floated on the lower oil level 13, and a spool 1 inserted into a cylinder 5 is linked to the float 2, so that oil is supplied to the oil pump 15 according to changes in the oil level 13. The passages are automatically switched, and FIGS. 1 and 2 show the first embodiment.

In FIG. 1, a vertical cylinder 5 that opens downward is provided with a vertically elongated discharge port 6 on the right side of its inner surface, and this discharge port 6 communicates with an oil pump 15 through a passage 7.

Suction ports 4 and 9 are provided on the inner surface of the cylinder on the opposite side of the discharge port 6 and on the inner surface of the cylinder on the front side within the range above and below the discharge port 6, and the suction port 4 passes through the passage 1T. The suction port 9 communicates with the inside of the chain case 10, and the suction port 9 passes through the partition wall 3 between the two cases 10 and 11 and communicates with the inside of the gear case 11, as shown in FIG.

Since the suction ports 4 and 9 are both within the range above and below the discharge port 6, the phases are separated by 900 degrees, but the annular groove 1a of the spool 1 allows the suction port 4 or the suction port 9 to be selectively discharged. It is connected to the outlet 6, and at some intermediate stage the suction ports 4, 9 are connected to the discharge port 6 partially at the same time.

8 is a weak compression spring.

The oil level 13 in the chain case 10 is high A as shown in Fig. 1.
When the float 2 is at the level, the float 2 floats up, and the movement of the spool 1 connected to it causes the suction port 4 to pass through the annular groove 1a and communicate with the discharge port 6, thereby allowing oil in the chain case 10 to flow into the passage 17. , suction port 4, annular groove 1a,
The oil is sucked out by the oil pump 15 through the outlet 6 and the passage 7, and the oil level in the chain case 10 gradually lowers.

After that, when the oil level 13 drops to level B as shown in Figure 2, the position of the float 2 becomes lower, and the suction port 4 is blocked by the spool 1 due to the movement of the spool 1, and the suction port 9 is now closed. It communicates with the discharge port 6 through the annular groove 1a.

Therefore, the oil in the gear case 11 flows through the suction port 9 and the annular groove 1.
a. The oil is supplied to the oil pump 15 through the exhaust port 6X passage I.

As mentioned above, part of the oil pressurized by the oil pump 15 is used to lubricate the chain 16 and then returns to the chain case 10, and the remaining part is used to lubricate the chain 16.
It is then returned to the gear case 11.

When the oil level 13 is in the middle of the AXB level, the suction port 4 that communicates with the chain case 10 and the suction port 9 that communicates with the gear case 11 pass through the annular groove 1a and partially communicate with the discharge port 6. , oil is sucked out from inside both cases, and the height of the oil level inside chain case 10 is maintained within a predetermined range.

In FIGS. 3 and 4 showing another embodiment, the gear case 1
The suction port 9' communicating with the suction port 1 extends upward in an elongated manner, and its upper end reaches the same level as the lower half of the suction port 4.

In this way, when oil is being discharged from the chain case 10 (FIG. 3), the upper end of the suction port 9' communicates with the discharge port 6 through the annular groove 1a, so the gear case 11
Oil is now supplied from inside at the same time, making it possible to prevent partial deterioration of the oil.

As explained above, according to the present invention, the height of the lower oil level can be reliably adjusted within a certain range with a simple structure.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional front view of the device according to the present invention, and Figure 2 is the
3 and 4 are drawings corresponding to FIGS. 1 and 2 to show another embodiment. 1...Spool, 2...Float, 3
...Cylinder, 4...Suction port, 5...
-... Cylinder -16... Discharge port, 7...
-...Passage, 9...Suction port, 10...
・Chain case, 11...-Gear case, 13
・・・－・・・Oil level.

Claims (1)

[Scope of utility model registration request] In order to maintain the height of the lower oil level within a certain range in a case that has two different oil levels, a cylinder is provided in the case, a spool having an annular groove is inserted into the cylinder, and the lower oil level is maintained within a certain range. A float is floated on the oil surface, and the float and spool are connected so that the spool slides within the cylinder according to the vertical movement of the float. A suction port is provided, and the first suction port is placed inside the case on the low oil level side, and the second suction port is placed inside the case on the low oil level side.
The suction ports are connected to the waste oil side case respectively, and a discharge port is provided on the inner wall of the cylinder at a position communicating with the first and second suction ports via the annular groove of the spool, and the discharge port is connected to the oil pump. The positions of the first and second suction ports and the discharge port are such that when the lower oil level rises above a predetermined level, the degree of communication between the first suction port and the discharge port increases through the annular groove of the spool. An oil level adjustment device characterized in that: