JPS627367Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an oil filter with a bypass filter.

An oil filter with a bypass filter has a full flow element and a bypass element provided in a filter casing, and oil flowing into the casing is filtered by the oil filter and then flows into each flow path.

In order to achieve this structure, conventional oil filters either have a full flow element made of a relatively coarse filtration member and a bypass element made of a fine filtration member arranged concentrically, or
Alternatively, it had a structure in which a full flow element and a bypass element were stacked. However, such a structure has the disadvantage that the structure of the partition wall for dividing the inside of the casing into each flow path is complicated, and the assembly is troublesome and the cost is high.

Furthermore, with the above structure, it is difficult to set the flow rate balance for each flow path to an optimal value.

This idea was devised in view of the above points, and is a bypass that is simple in structure and assembly, easy to set the flow rate for each flow path, and is highly compatible with existing oil filters. The purpose of the present invention is to provide an oil filter with a filter.

Hereinafter, one embodiment of this invention will be described in detail using the drawings.

FIG. 1 is an overall view of an oil filter according to an embodiment of this invention, and FIG. 2 is a diagram showing the configuration of the filter element.

In the figure, 1 is a mounting base, and 2 is an oil filter body mounted on the mounting base 1. The main body 2 includes a cylindrical filter casing 3 opened at the bottom, a filter assembly 4 fitted into the casing 3, a base plate 5 disposed on the bottom of the casing 3, and supporting the bottom of the base plate 5. , a bottom plate 6 whose peripheral edge is caulked to the lower edge of the casing 3, and a spring 7 which is located on the ceiling surface of the casing 3 and presses and fixes the filter assembly 4 onto the base plate 5.

The filter assembly 4 includes upper and lower end plates 8 and 9, a support tube 10 made of a porous metal cylinder whose both ends are supported between the end plates 8 and 9, and a support tube 10 that is fitted and fixed into the inner tube of the support tube 10. The filter element 11 is made up of a filter element 11. element 11
consists of a full flow element 11a made of a relatively coarse filtration member and a bypass element 11b made of a fine filtration member,
Each sheet-like filter member is folded into peaks and valleys, and then unfolded into a chrysanthemum shape, and each element 11a,
11b are connected in the circumferential direction to form one cylinder. A partition plate 12 is interposed at the joint between the elements 11a and 11b, dividing the inner cylinder into two in the radial direction, and a space 13 formed by the full flow element 11a and the partition plate 12 is placed on the side of the full flow channel. Also, the bypass element 11b
The space 14 surrounded by the partition plate 12 is communicated with the bypass flow path side.

On the other hand, the mounting base 1 includes an inlet port 1a that communicates with the outer peripheral side of the filter assembly 4;
A full flow port 1b connected to the center of the base plate 5 and a bypass port 1c shaped like an orifice are formed around the periphery of the full flow port 1b, and each space 1
3 and 14 communicate with the full flow and bypass ports 1b and 1c in a partitioned state, respectively. Therefore, most of the oil introduced into the outer periphery of the filter assembly 4 through the inlet port 1a passes through the full flow element 11a and flows from the space 13 to the full flow port 1b. Further, a part of it passes through the bypass element 11b and communicates from the space 14 to the bypass port 1c.

The flow rate ratio of the oil filter communicating with each flow path is uniquely determined by the ratio of the circular arcs once the density of each filter member is determined, so the flow rate ratio can be set extremely easily.

As explained above in the embodiments, according to this invention, the flow paths can be distributed by interposing the partition plate inside the cylinder constituted by each element, which simplifies the structure and assembly. Furthermore, with this invention, the oil flow rate ratio for each flow path can be easily set, and compatibility with existing oil filters can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing the overall structure of an oil filter according to this invention, and FIG. 2 is an exploded perspective view of the main parts. 1... Mounting base, 1a... Inlet port, 1b... Full flow port, 1c... Bypass port, 2... Oil filter body, 3... Casing, 4... Filter assembly, 5... Base plate, 6 ...Bottom plate, 7...Spring, 8,9...
End plate, 10... Support cylinder, 11... Filter element, 11a... Full flow element, 11b... Bypass element, 12... Partition plate, 13, 14... Space portion.

Claims (1)

[Scope of utility model registration request] The filter element is made up of a filter element which is formed by unfolding a filter member folded into peaks and valleys into a chrysanthemum shape and rolled into a cylindrical shape, and a filter casing in which the filter element is housed, and the filter element is divided into two in the circumferential direction. , consists of a full-flow element made of a relatively coarse filtration member and a bypass element made of a fine-mesh filtration member, and a partition plate is interposed at the joint between the two, and a partition plate is formed between the partition plate and the full-flow element. An oil filter with a bypass filter, characterized in that a space is communicated with a full flow channel, and a space formed between a partition plate and a bypass element is communicated with a bypass channel.