JPS6224005Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil filter used in automobile engines and the like.

In an engine with a wide rotation range, such as an automobile engine, the flow rate (pressure) of engine oil discharged from an oil pump varies greatly as the engine rotation speed changes. Therefore, in the case of oil filters used in this type of engine, when the pressure on the clean side of the filter element reaches a predetermined value or more, a regulator is provided that connects the dirty side of the filter element with the passage leading to the oil pan of the engine. At the same time, when the filter element becomes clogged and the pressure difference between the dirty side and the clean side exceeds a specified value, the short valve is installed to maintain the pressure of oil supplied to each part within a specified range. It is necessary to communicate the dirty side and the clean side through the filter element (bypassing the filter element) so that a predetermined amount of oil can be sent to the oil gear gallery in any case.

However, with conventional oil filters,
The shot valve and regulator valve are separate parts, and these valves were assembled individually, which required a large amount of assembly time.Also, due to the need to secure space for assembly, the body of the oil filter was It was necessary to make it larger than necessary. Further, when the regulator valve and the shot valve are constructed separately as in the past, the number of machined parts of the body increases, resulting in a disadvantage that the product cost of the oil filter increases.

The present invention has been made in view of the above circumstances, and includes a normally closed short valve that connects the dirty side and the clean side when the pressure difference between the dirty side and the clean side of the filter element reaches a predetermined value or more; A regulator valve that communicates the dirty side with a passage leading to an oil pan of the engine when the pressure on the clean side reaches a predetermined value or more is disposed on the same axis and integrated into the body of the oil filter. It is an object of the present invention to provide an oil filter for an engine that simplifies the assembly work of each of the valves and at the same time reduces the size of the oil filter body.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In FIG. 1 showing one embodiment, an engine body 1 includes a passage 2 communicating with a discharge port of an oil pump (not shown) and a passage 3 communicating with an oil gear gallery.
and a passage 4 open to the oil pan. A filter element 7 and a casing 8 covering the element 7 are removably attached to the body 6 of the oil filter 5, which is fastened and fixed to the engine body 1 with bolts (not shown). Further, the body 6 includes an element 7.
A dirty passage 9 connecting the dirty side of the element 7 and the passage 2 leading to the oil pump, a clean passage 10 communicating the clean side of the element 7 and the passage 3 leading to the oil gear gallery, and a passage 4 open to the oil pan. An overflow passage 11 is provided, and a dirty passage 9 and a clean passage 10 are made adjacent to each other.

Furthermore, in the mounting hole 12 drilled in the body 6,
A first bottomed cylindrical body 15 having a port 13 communicating with the dirty passage 9 in the bottom wall and a port 14 communicating with the clean passage 10 in the peripheral wall; ports 16 communicating with the passage 9' and the overflow passage 11 adjacent to the passage 9';
17 and a second bottomed cylindrical body 18 having a peripheral wall thereof are connected in series and inserted, and are tightened and fixed with a plug 19. A piston-shaped shot valve 20 is slidably inserted and held in the first bottomed cylindrical body 15, and a gap between the shot valve 20 and the bottom wall of the second bottomed cylindrical body 18 is A valve spring 22 is provided to elastically hold the valve 20 on a valve seat 21 formed on the inner bottom surface of the first bottomed cylindrical body 15. In addition, when the short valve 20 is in the seated state, the port 14 leading to the clean passage 10 is also closed by the skirt portion of the valve 20, and furthermore, the port 14 leading to the clean passage 10 is connected to the skirt portion of the short valve 20 through the port 14. A small hole 23 is bored through which the interior (spring chamber) and the clean passage 10 communicate. A spool-shaped regulator valve 24 with a small diameter in the center is slidably inserted into the second bottomed cylindrical body 18, and one end surface (overflow passage) of the regulator valve 24 is inserted into the second bottomed cylindrical body 18. 11 side end surface) and the tip of the plug 19 to elastically hold the regulator valve 24 at the innermost end of the second bottomed cylindrical body 18,
A space 26 formed between the small diameter portion of the regulator valve 24 and the inner peripheral surface of the cylindrical body 18 is normally communicated only with the port 16 communicating with the dirty passage 9'. A pilot pressure chamber 27 is formed between the inner bottom surface of the second bottomed cylindrical body 18 and the end surface of the regulator valve 24.
7 and the inside (spring chamber) of the first bottomed cylindrical body 15 is connected to the second bottomed cylindrical body 18.
It is perforated in the bottom wall of. Numeral 29 is a bolt for tightening and fixing the casing 8 to the body 6.

In such a configuration, the shot valve 20 is always
Since the regulator valve 24 and the regulator valve 24 are held at the positions indicated by solid lines, the oil discharged from the oil pump is introduced from the passage 2 through the dirty passage 9 to the dirty side (outside) of the filter element 7, and is filtered by the element 7. Clean passage 10 from the clean side (inside) after receiving the action
The oil flows out into the passage 3 through the passageway 3, and is sent under pressure to the oil gear gallery of the engine.

During such filtration, the pressure in the dirty passage 9 is applied to the top surface of the shot valve 20 that closes the port 13, and the pressure in the clean passage 10 is applied to the inside of the first bottomed cylindrical body 15 from the small hole 23 bored in the shot valve 20. It is further introduced into the pilot pressure chamber 27 through a small hole 28.

Now, when the filter element 7 is clogged and the filtration resistance increases and the amount (pressure) of oil sent from the clean passage 10 to the oil gear gallery decreases, the pressure in the dirty passage 9 increases accordingly. Then, the pressure balance that kept the shot valve 20 closed collapses, and when the differential pressure reaches a predetermined value or more, the shot valve 20 increases the tension of the spring 22 and the first bottomed cylindrical body, as shown by the dashed line. It is pushed up from the valve seat 21 against the internal pressure of the valve 15, opening both ports 13 and 14. Therefore, the oil in the dirty passage 9 flows from the port 13 into the first bottomed cylindrical body 15 and flows out from the port 14 into the clean passage 10, ensuring the pressure and amount of oil sent to the oil gear gallery.

Further, when the amount of oil discharged from the oil pump increases and excessive oil is about to be sent to the oil gear gallery, the internal pressure of the clean passage 10 increases. Then, the pressure in the pilot pressure chamber 27 increases, so the regulator valve 24 is moved by the spring 2.
5 in the second bottomed cylindrical body 18 as shown by the dashed line, and connects both ports 1 through the space 26.
6 and 17 are connected. Therefore, the oil in the dirty passage 9' flows out into the overflow passage 11 through the communicating ports 16 and 17, reducing the pressure in the dirty passage 9, so there is no risk of excessive oil being sent to the oil gear gallery. Moreover, oil exceeding the capacity of the filter element 7 is not supplied to the dirty side.

As described above, in this embodiment, as a configuration according to the present invention, the first cylindrical body holding the shot valve 20 and the second cylindrical body 18 holding the regulator valve 24 are combined to connect both valves. By arranging and integrating the oil filters on the same axis, the assembly is simplified and the body of the oil filter is made smaller.

Of course, the short valve 20 and the regulator valve 24 may be set in the same cylindrical body.

FIG. 2 shows another embodiment of the present invention. In this embodiment, a piston-type regulator valve 24' is inserted into the mounting hole 12 bored in the body 6.
Slide into this regulator valve 2.
4' faces the clean passage 10', when the pressure in the passage 10' reaches a predetermined value or higher, the regulator valve 24' moves against the tension force of the spring 25, and the valve 24 The dirty passage 9' and the overflow passage 11 are made to communicate with each other through a groove 26' provided on the outer peripheral surface of the skirt portion. A plunger-type shot valve 20' is slidably inserted into the regulator valve 24', and a retaining ring 30 attached to the inner circumference of the skirt portion of the regulator valve 24' is connected to the end face of the valve 20'. By tensioning the spring 22 between them, the shot valve 20' is held resiliently at the innermost end of the regulator valve 24'. A pilot pressure chamber 31 is provided between the top surface of the shot valve 20' and the inner bottom surface of the regulator valve 24', and a port 13' connecting this chamber 31 and the dirty passage 9', 31
A port 14' connecting the clean passage 10 and the regulator valve 24' is provided in the peripheral wall of the regulator valve 24', and the port 14' is normally closed by a shot valve 20'. Therefore, even in this case, the pressure of the clean passage 10' is applied to the shot valve 20' from the skirt portion of the regulator valve 24', and the pressure of the dirty passage 9' is applied from the pilot pressure chamber 31, so that both When the pressure difference between the passages 9' and 10' exceeds a predetermined value, the shot valve 20' moves within the regulator valve 24' against the spring 22, thereby communicating the dirty passage 9' and the clean passage 10. This makes it possible to ensure the pressure and amount of oil delivered to the oil gear gallery. In addition, 32
is a drain pipe attached to the plug 19 to return oil leaking into the mounting space of the spring 25 to the oil pan.

Even in this configuration, the shot valve 20' and the regulator valve 24' perform predetermined operations in the same manner as in the previous embodiment, and each valve 20', 24' is arranged on the same axis. Since it is integrated and incorporated into the oil filter body, it is possible to simplify the assembly work and downsize the oil filter body. Particularly, when the shot valve 20' is mounted inside the regulator valve 24' as in this embodiment, there are advantages in that the number of parts used can be reduced and the mounting hole 12 can be made shallower, which in turn makes it possible to reduce the size of the oil filter body. Miniaturization can be further promoted.

As described above, according to the present invention, the shot valve and the regulator valve, which were conventionally configured separately, are arranged on the same axis and integrated into the oil body. The number of installation steps can be significantly reduced, and the number of mounting surfaces (work surfaces) on the body can be reduced to one, which greatly simplifies the work of assembling the oil filter of each valve onto the body. Since the number of processed parts is reduced, the size and weight can be reduced, the degree of installation freedom is increased, and handling becomes easier.Especially as an oil filter for automobile engines, which requires smaller size, lighter weight, and more diverse mounting forms. Optimal.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part showing another embodiment of the present invention. 5...Oil filter, 6...Body, 7...
Filter element, 9, 9'...Dirty passage, 10, 10'...Clean passage, 11...Overflow passage, 12...Mounting hole, 15, 18
...Cylindrical body, 20, 20'...Shot valve,
24, 24'...regulator valve.

Claims (1)

[Claims for Utility Model Registration] (1) A normally closed short valve that communicates the dirty side and clean side when the pressure difference between the dirty side and the clean side of the filter element reaches a predetermined value or more, and the pressure on the clean side. A regulator valve that communicates the dirty side with a passage leading to an oil pan of the engine when the temperature reaches a predetermined value or more is disposed on the same axis and integrated into the body of the oil filter. oil filter. (2) The shot valve and the regulator valve are integrated through a cylindrical body that slidably inserts and holds both valves, Claim 1 of the Utility Model Registration Claim. Oil filter for the engine described in . (3) The engine according to claim 1, wherein the shot valve is slidably inserted and held inside a regulator valve having a cylindrical shape with a bottom. oil filter.