JPH0141454Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a filter unit having a full-flow outflow path and a bypass outflow path.

BACKGROUND ART Conventionally, in a filter unit, the inside of the case is generally partitioned into an inflow side oil chamber and an outflow side oil chamber by a filter housed in the case. In addition, a full flow element and a bypass element are used as filters to partition the oil chamber on the outflow side into a full flow outflow path and a bypass outflow path, and oil is supplied from the full flow outflow path to the engine section, and from the bypass outflow path to the oil tank. There are some that carry out reflux of oil, and a representative example is the one described in Japanese Utility Model Publication No. 12566/1983.

Problems that the invention aims to solve: In order to partition the outflow side oil chamber into a full flow outflow path and a bypass outflow path, it is necessary to use partition members and sealing members, and it is necessary to maintain each of these members in a stable installation state. There must be. Kimiaki Sane
According to the method described in Publication No. 60-12566, an intermediate plate that partitions a full flow element and a bypass element is tilted downward, and this intermediate plate is used to partition a full flow outflow path and a bypass outflow path, and the tip of the intermediate plate is A sealing member that comes into contact with the outer periphery of the inner pipe is attached to the inner pipe. Therefore, due to the strength and dimensional accuracy of the intermediate plate, the contact state of the seal member to the outer circumference of the inner pipe becomes unstable, making it difficult to reliably partition and seal the full flow side and the bypass side. Furthermore, it is not easy to assemble the intermediate plate and the seal member when replacing the filter.

This invention was devised in view of these points, and the purpose is to obtain a filter unit that can reliably partition and seal the full flow side and the bypass side, and that can be easily assembled when replacing the filter. do.

Means for solving the problem An inflow oil chamber and an outflow oil chamber are formed in the case, which are partitioned by a full flow element and a bypass element, and a bracket is provided to cover the bottom of the case. An oil inlet communicating with the oil chamber, a full flow outlet and a bypass outlet are formed. A bypass center pipe is provided in the outflow side oil chamber, and both upper and lower ends of this bypass center pipe are bonded to bypass end plates that support both upper and lower ends of the bypass element. a full-flow outflow path surrounded by the full-flow element, the bypass end plate, and the bypass center pipe and communicated with the full-flow outlet; and a bypass outflow path surrounded by the bypass element, the bypass end plate, and the bypass center pipe, and communicated with the bypass outlet. Form.

Function A bypass center pipe that partitions the bypass outflow path and the full flow outflow path is bonded to the bypass end plate. Therefore, the bypass outflow path and the full flow outflow path are securely partitioned, and leaks are prevented. In addition, the bypass center pipe is integrated with the bypass end plate and the bypass element, making it easy to assemble the filter when replacing the filter.

Embodiment A first embodiment of this invention will be described based on FIG. Inside the case 1 with an opening at the bottom, there are a full flow element 4 whose upper and lower ends are bonded to a pair of upper and lower full flow end plates 2 and 3, and a bypass element 7 whose upper and lower ends are bonded to a pair of upper and lower bypass end plates 5 and 6. It is stored,
The inside of the case 1 is partitioned by these elements 4 and 7 into an inflow side oil chamber 8 at the outer periphery of the elements 4 and 7 and an outflow side oil chamber 9 at the inner periphery of the elements 4 and 7. In addition, on the inner peripheral part of the full flow element 4, there is a full flow inner pipe 10 whose upper and lower ends are bonded to the full flow end plates 2 and 3.
Furthermore, bypass end plates 5,
A bypass inner pipe 11 bonded to 6 is provided. A bypass center pipe 12 is provided in the outflow side oil chamber 9 and has both upper and lower ends adhered to the bypass end plates 5 and 6, and whose lower end is pressed by a packing described later. This bonded bypass center pipe 12 partitions the outflow side oil chamber 9 into a full flow outflow path 13 and a bypass outflow path 14. A cover 16 having a large diameter screw hole 15 formed in the center is fixed to the bottom of the case 1, and a gasket 17 is fixed to the periphery of the bottom of the case 1. A packing 18 is provided on the inner circumference of the bypass end plate 6.
is attached, and this packing 18 is in contact with the bypass center pipe 12, the cover 16, and the nipple outer periphery described later.

Next, a bracket 19 is provided which is detachably attached to the bottom of the case 1, and this bracket 19 is formed with an oil inlet 20, a full flow outlet 21, and a bypass outlet 22. A cylindrical nipple 23 is screwed into the bypass outlet 22, and this nipple 23 is further screwed into the screw hole 15. A cylindrical pipe 24 is caulked inside the nipple 23, and a nipple bypass passage 25 is formed between the outer peripheral surface of the pipe 24 and the inner peripheral surface of the nipple 23. One end of the nipple bypass flow path 23 is connected to the nipple 2.
3, a flow path hole 27 formed in the packing 18, and a flow path hole 28 formed in the bypass end plate 6, which communicate with the bypass outflow path 14. The other end of the nipple bypass passage 25 is communicated with the bypass outlet 22 via a passage hole 29 formed in the nipple 23 .

An O-ring 30 is interposed between the full flow end plate 3 and the bypass end plate 5. Further, a lower end portion of a full flow center pipe 31 extending upward is bonded to the full flow end plate 3.

In such a configuration, oil flowing from the oil inlet 20 flows into the inflow side oil chamber 8 from the flow path hole 32 formed in the cover 16, and most of the oil passes through the full flow element 4 and flows into the full flow outlet path 13. The water then passes through the nipple 23 and is supplied to each part of the engine from the full flow outlet 21. Further, a part of the oil that has flowed into the inflow side oil chamber 8 passes through the bypass element 7 and reaches the bypass outflow passage 14, and furthermore, the oil flows through the passage holes 28, 27,
26, 29 and the nipple bypass passage 25 from the bypass outlet 22 to the oil tank (not shown).
is refluxed to.

Here, the nipple bypass channel 25 is formed by caulking and fixing the pipe 24 inside the nipple 23, and can reliably partition the full flow side and the bypass side with the pipe 24 in between. In addition, the nipple 23 has one end attached to the bracket 19.
The cover 16 is supported by being screwed into the cover 16, and the substantially middle part is screwed into and supported by the cover 16, so that a stable support state can be obtained without eccentricity. Therefore, the state of contact of the packing 18 with the outer circumferential surface of the nipple 23 is stabilized, and sealing between the full flow outlet passage 13 and the bypass outlet passage 14 at the outer circumference of the nipple 23 can be reliably performed. Furthermore, the contact between the packing 18 and the bypass center pipe 12 ensures the sealing between the full-flow outflow path 13 and the bypass outflow path 14 at the lower end of the bypass center pipe 12. Furthermore, the cover 16 of the packkin 18
The contact between the bypass outflow path 14 and the inflow side oil chamber 8 can be reliably sealed. In this way, the pipe 24 forming the nipple bypass flow path 25 is integrated with the nipple 23, and the seal between the full flow outflow path 13, the bypass outflow path 14, and the inflow side oil chamber 8 is created by one packing 18. Therefore, assembly can be easily performed when replacing the filter, etc. Furthermore, the bypass inner pipe 12 is connected to the bypass end plate 5,
6 and bypass element 7, and can be easily assembled when replacing the filter.

Next, the upper end of the bypass center pipe 10 is bonded to the bypass end plate 5, thereby preventing oil leakage between the bypass outflow path 14 and the full flow outflow path 13 at the upper end of the bypass center pipe 12. Further, the O-ring 30 prevents oil from leaking between the full flow end plate 3 and the bypass end plate 5. The oil that has passed through the full flow element 4 and reached the outflow side oil chamber 9 reaches the inside of the full flow outflow path 13 from the upper end of the full flow center pipe 31. Therefore, when the engine is stopped, this full flow center pipe 3
The full-flow element 4 is immersed in oil up to a position equal to the height of 1, and the full-flow element 4 is prevented from drying.

Next, a second embodiment of this invention will be explained based on FIG. 2. Incidentally, the same parts as those explained in FIG. 1 are indicated by the same reference numerals, and the explanation thereof will be omitted. In this embodiment, first, the lower end of the bypass center pipe 12 is bonded to the inside of the bent portion of the bypass end plate 6, and the outside of this bent portion is brought into contact with the packing 18, thereby sealing the full flow outflow path 13 and the bypass outflow path 14. is being carried out. A pipe 33 is caulked into the flow passage hole 28 to prevent the flow passage hole 28 from being blocked by adhesive when the lower end of the bypass inner pipe 11 is bonded to the bypass end plate 6. Furthermore, this pipe 33
also serves as a guide for the bypass inner pipe 11. Further, the lower end of the full-flow center pipe 31 is spot-welded to the lower end of the full-flow inner pipe 10, and the full-flow center pipe 31 and the full-flow inner pipe 10 are integrally bonded to the full-flow end plate 3 together with the lower end of the full-flow element 4. ing.

Effects of the invention As described above, this invention separates the bypass outflow path from the full flow outflow path by bonding both the upper and lower ends of the bypass center pipe to a pair of upper and lower bypass end plates. The partition can be installed reliably to prevent leaks, and since the bypass center pipe, bypass end plate, and bypass element are integrated, it can be easily assembled when replacing the filter. have

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing a first embodiment of this invention, and FIG. 2 is a longitudinal sectional front view showing a second embodiment of this invention. 1...Case, 4...Full flow element,
5, 6...Bypass end plate, 7...Bypass element, 8...Inflow side oil chamber, 9...
Outflow side oil chamber, 12... Bypass center pipe, 13... Full flow outflow path, 14... Bypass outflow path, 19... Bracket, 20... Oil inlet, 21... Full flow outlet, 22... Bypass outlet.

Claims (1)

[Scope of utility model registration request] A case with an opening at the bottom is provided, which is partitioned by a full flow element and a bypass element into an inflow side oil chamber on the outer periphery of these elements and an outflow side oil chamber on the inner periphery of these elements, and a full flow outlet, a bypass outlet, and the inflow side. A bracket is provided that forms an oil inlet communicating with the oil chamber and covers the bottom of the case, and a bypass center pipe is provided in the outflow side oil chamber;
Both upper and lower ends of the bypass center pipe are bonded to bypass end plates that support both upper and lower ends of the bypass element, and a full-flow outflow path is surrounded by the full-flow element, the bypass end plate, and the bypass center pipe, and communicates with the full-flow outlet. and a bypass outflow path surrounded by the bypass element, the bypass end plate, and the bypass center pipe and communicating with the bypass outlet.