JPH0744448U - Oil filter - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent excessive compression of the gasket of the oil filter. [Structure] The gasket 2 is provided adjacent to the inside of the winding fastening portion 1 of the oil filter, and the gasket 2 has a plate-shaped holding portion inside thereof. This holding portion is housed in the gasket holding portion 3, and the gasket 2 is provided with a sufficiently deformable space around it. While this gasket 2 has a height dimension higher than that of the winding-fixing part 1, the winding-fixing part 1 is compressed by the compression force when the oil filter is tightened with a normal tightening torque.
It is compressible below, and when the oil filter is attached to the attachment portion, the winding fastening portion 1 serves as a stopper to prevent excessive compression of the gasket 2.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a seal portion of an oil filter of an internal combustion engine. 2. Description of the Related Art Conventionally, an oil filter of this type has an annular groove formed in a closure plate fixed to a reinforcement plate of the oil filter, as described in US Pat. No. 3,567,023, for example. It has a structure in which a gasket is held in the groove, and an oil filter is tightened and fixed to a mounting portion of an internal combustion engine and sealed by its elasticity. However, according to the conventional method, since the compression rate of the gasket is not kept constant, that is, the gasket is compressed at an arbitrary compression rate by the additional tightening of the oil filter. Therefore, the compression set tends to increase due to an excessive compression rate, and if environmental conditions such as heat are added to this and the gasket itself deteriorates, its elasticity is impaired. Therefore, the conventional one causes sealing failure and looseness due to vibration, which may lead to oil leakage. Further, as disclosed in Japanese Utility Model Laid-Open No. 58-26911 or Japanese Utility Model Laid-Open No. 59-119313, there is known a technique in which a stopper is formed on a closure plate to make the compression rate of a seal packing (gasket) constant. However, the closure plate requires special processing, which complicates the processing process, and the diameter of the gasket is significantly smaller than the outer diameter of the oil filter, which hinders miniaturization of the oil filter. . Therefore, the present invention aims to limit the compressibility of the gasket of the oil filter to a constant value with a simple structure that has never been used. In order to achieve the above-mentioned object, the present invention provides a filter element, a case with one blind end that houses the filter element, and an outer peripheral portion of which is raised in the axial direction of the case. To form a wall surface on the inside thereof, and the outer peripheral portion of the wall surface is fixed to the peripheral edge of the open end of the case to cover the open end of the case, an oil inlet and an oil outlet are formed, and a mounting screw hole is formed at the center. An oil filter including a plate provided, which is adjacent to an inner wall surface of the outer peripheral portion and has an outer diameter slightly smaller than an inner diameter of the wall surface, and a predetermined gap with respect to the wall surface. It is located and has a height dimension exceeding the tip of the outer peripheral portion, and can be compressed lower than the tip of the outer peripheral portion in the height direction by a compression force by a normal tightening torque, and An annular gasket having a holding portion on the inside is provided, and the plate is formed such that the outer peripheral portion is formed to project most toward the axial direction of the case, and a holding portion that holds the holding portion of the gasket is provided. The technical means of having an oil filter is adopted. According to the present invention described above, the gasket has the holding portion housed and held in the housing portion of the plate, and is prevented from falling off from the plate in a relatively freely deformable state. Has been done. Moreover, even though a gasket that can be compressed lower than the outer peripheral portion of the plate by the compression force due to the normal tightening torque is used, the outer peripheral portion of the plate is formed so as to protrude most in the axial direction of the case. When tightening the oil filter according to the present invention on the engine mounting part, if the tightening is done with normal tightening torque, the outer peripheral part of the plate contacts the engine mounting part and becomes a stopper, and the compression rate of the gasket becomes constant. Excessive compression is prevented. Embodiments of the present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows a main part of the present invention, in which an annular gasket 2 is held in a groove-shaped gasket holding portion 3 having an inner side 1a of a winding fastening portion 1 as one side surface and is deformable during compression. Voids 4, 4'are provided. The state where the oil filter is attached to the attachment portion 14 of the internal combustion engine is shown in FIG. 2. The tip of the winding fastening portion 1 comes into contact with the attachment portion 14 to serve as a stopper, and the gasket 2 is further extended in the height direction. It is compressible, but it is compressed at a constant compression rate. As a matter of course, the height dimension B (FIG. 1) of the gasket 2 exceeds the height dimension C of the stopper portion. Further, the gasket 2 is deformed into the cavities 4 and 4'in FIG. An example of the structure of the oil filter of the present invention will be described. In FIG. 3, a filter element 9 is housed in a case 5 which is blind at one end. The open end of the case 5 is closed by a reinforcement plate 7, and the closure plate 6 provided on the plate 7 is fixed by winding around the open end of the case 5. The reinforcement plate 7 and the closure plate 6 form a plate that closes the open end of the case 5. The fixing portion 1 projects in the axial direction of the case 5 to form a stopper portion. The outer peripheral portion of the closure plate 6 is raised and bent toward the axial direction of the case 5 in the fixed portion 1 as shown in the drawing, and a wall surface is formed inside thereof. On the other hand, there is provided an accommodating portion for accommodating the plate-shaped holding portion of the gasket by bending the closure plate 6 at the other end into a hook shape such that the tip approaches the plate. An oil outlet 7a also serving as a mounting screw hole is provided at the center of the reinforcement plate, and a plurality of oil inlets 7b are provided around the oil outlet 7a. In the figure, 8 is a check valve, 10 is a protector, 11 is a support spring, 12 is an annular protrusion, and 13 is a release valve. The dimensions of each part of the above-mentioned example of the present invention are shown in FIG. 1. The dimension of the stopper portion A in FIG. 1 is 4 mm, the height dimension B of the gasket 2 is 3.7 to 3.9 mm, and the dimension C when compressed is 2. It is set to 7 to 2.9 mm. In the conventional tightening type oil filter (the above-mentioned US patent) and the oil filter of the present invention, both are tightened and fixed to the internal combustion engine with a tightening torque of 150 kg · cm, the oil temperature is 130 ° C., and the oil amount is 20 l / min. The circulation endurance test was performed. Table 1 shows the results of an examination of the tightening torque and sealing property after this test. As shown in Table 1, in the case of the conventional tightening type, the tightening torque is decreased due to the deterioration of the gasket, and the limit durability is also greatly decreased from the initial value. On the other hand, the present invention is extremely advantageous. [Table 1] In the past, there was an oil filter that provided a stopper inside the winding fastening part, but since the winding fastening part is located outside the stopper, the outer diameter of the oil filter case is considerably larger than the diameter of the gasket. Therefore, the outer diameter of the oil filter cannot be reduced. However, by using the stopper as the winding fastening part can be freely used in this proposal, it is possible to reduce the size of the oil filter case in the outer diameter direction without changing the size of the diameter of the gasket. Significant weight reduction can be achieved. FIG. 4 shows another example of the present invention. The head shape of the gasket 2 is asymmetrical in order to secure the compression rate and the volumetric rate. As an example of the dimensions of each part of this embodiment, the stopper dimension A is set to 4 mm, the gasket height dimension B is set to 4.2 to 4.4 mm, and the dimension C when compressed is set to 3.2 to 3.4 mm. Yes, a certain compression rate can be secured. According to the configuration and operation of the present invention described above, the gasket can be held in the plate in a deformable state, and the gasket is compressed to a lower level than the outer peripheral portion of the plate by the compression force of the normal tightening torque. When the oil filter is tightened to the engine mounting part, if the tightening torque is normal, the outer periphery of the plate will come into contact with the engine mounting part and serve as a stopper. Is constant, and it is possible to prevent excessive compression.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a main part of an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state in which the configuration of FIG. 1 is attached to a mounting portion. FIG. 3 is a half sectional view showing the overall configuration of an embodiment of the present invention. FIG. 4 is a cross-sectional view showing another embodiment of the present invention. [Explanation of reference numerals] 1 winding fastening part 2 gasket 3 gasket holding part 4 cavity 5 casing 6 closure plate 7 reinforcement plate 9 filtration element

Claims (1)

[Claims for utility model registration] (1) Filter element, one-end blind case accommodating the filter element, and an outer peripheral portion raised in the axial direction of the case to form a wall surface inside thereof, and an outer periphery thereof An oil filter that is fixed to the peripheral edge of the open end of the case at a portion to cover the open end of the case, forms an oil inlet and an oil outlet, and has a plate having a mounting screw hole at the center. A height that is adjacent to the inner wall surface of the outer peripheral portion, has an outer diameter slightly smaller than the inner diameter of the wall surface, and is located through a predetermined gap with respect to the wall surface, and that exceeds the tip of the outer peripheral portion. An annular gasket that has dimensions and that can be compressed in the height direction by compression force due to normal tightening torque and is lower than the tip of the outer peripheral portion, and that has a holding portion inside Only, said plate, together with the outer peripheral portion is formed by the most projecting toward the axial direction of the case, an oil filter and having an accommodating portion for accommodating a retaining portion of the gasket. 2. The oil filter according to claim 1, wherein a tip of the housing portion is bent in a hook shape so as to approach toward the plate.