JP2010203325A - Bracket and filter attachment structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bracket inhibiting a drop of attachment strength of a sensor, reducing cost by simplifying the parting of a mold even if an oil passage structure is complicated, and attaining reduction in size and weight by thinning resin wall thickness. <P>SOLUTION: This bracket 3 is for attaching the oil filter 5 on the cylinder body 4 of an engine, and includes metal pipes (a first and a second metal pipe 15, 16) forming oil passages 20, 21, and resin pipes (a first and a second resin pipes 17, 18) integrally formed at the outer circumference of the metal pipes. Screw parts 23 for attaching the sensor are formed on the metal pipes. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bracket and a filter mounting structure, and more specifically, it is possible to suppress a decrease in the mounting strength of the sensor, and to reduce the cost by simplifying the mold division even in a complicated oil passage configuration. The present invention relates to a bracket and a filter mounting structure that can be reduced in size and weight by resin thinning.

  Conventionally, an aluminum die-casting bracket is generally known as a bracket for attaching an oil filter to a cylinder body of an engine. In this bracket, for example, a screw hole for attaching a hydraulic sensor (metal screw) facing an oil passage formed therein may be cut and formed.

In recent years, it has been proposed to change the bracket from a conventional metal to a resin in order to reduce the weight.
However, when the entire bracket is made of resin, for example, as shown in FIG. 11, a screw hole 123 for attaching a sensor is directly formed in the resin bracket 103, and a hydraulic sensor 124 is attached to the screw hole 123. In the resin bracket 103, since thermal deformation due to creep is large, the tightening torque of the hydraulic sensor 124 may be reduced and the hydraulic sensor 124 may rotate in the loosening direction.
In addition, when the resin bracket 103 has a complicated oil passage configuration (for example, a U-shaped oil passage configuration), a waste hole 102a for oil passage configuration is set in the resin bracket 103, and the waste hole 102a is set as a stopper. It is necessary to seal with 102b. This complicates the parting and increases the cost.
Furthermore, in order to ensure the required strength, the thickness of the resin bracket 103 is increased, the number of reinforcing ribs and the like is increased, and the merit of weight reduction due to resinization is reduced.

  Further, generally, gaskets 128 and 113 are generally provided between the resin bracket 103 and the cylinder body 104 and between the resin bracket 103 and the oil filter 105 to ensure liquid tightness. . However, in the resin bracket 103, there is a possibility that oil leakage at the seal portion may occur due to thermal deformation due to creep.

  As a conventional bracket, one having a structure in which a filter body is fixed to a cylinder body with a single hollow metal bolt and a hollow portion of the metal bolt is used as an oil passage (for example, a patent) Reference 1). Further, as a conventional flow channel pipe, one in which a resin pipe is integrally formed on the outer peripheral side of an L-shaped metal pipe by insert molding is known (for example, see Patent Document 2). However, these prior arts do not disclose or suggest attaching a sensor and increasing the attachment strength of the sensor.

JP 2000-274222 A JP 2006-29264 A

  The present invention has been made in view of the above-described present situation, and can suppress a decrease in the mounting strength of the sensor, and can achieve cost reduction by simplifying the mold division even in a complicated oil passage configuration. An object of the present invention is to provide a bracket and a filter mounting structure that can be reduced in size and weight by reducing the thickness of the resin.

The present invention is as follows.
1. A bracket for attaching an oil filter to the cylinder body of an engine,
A metal pipe forming an oil passage;
A resin pipe integrally formed on the outer peripheral side of the metal pipe,
A bracket characterized in that a screw portion for sensor attachment is formed on the metal pipe.
2. A contact portion that contacts a gasket provided between the cylinder main body and the bracket is provided on one end side of the metal pipe. The bracket described.
3. The contact portion is constituted by an inner peripheral surface forming the oil passage of the metal pipe. The bracket described.
4). The contact portion is constituted by a flange portion formed on one end side of the metal pipe. The bracket described.
5). The screw part is formed by burring. To 4. The bracket according to any one of the above.
6). A housing part that forms a filtration chamber with the case member of the oil filter is integrally formed on one end side of the resin pipe. To 5. The bracket according to any one of the above.
7). Above 1. To 6. Including the bracket according to any one of
An oil filter is attached to an engine cylinder body through the bracket.

According to the bracket and filter mounting structure of the present invention, since the screw portion for sensor mounting is formed on the metal pipe, there is almost no thermal deformation at the screw portion, and the mounting strength of the sensor screwed to the screw portion is reduced. Can be suppressed. In addition, since it has a metal pipe that forms an oil passage and a resin pipe that is integrally formed on the outer periphery of the metal pipe, it is necessary to use a drain hole or a stopper plug even in a complicated oil passage configuration. In addition, the cost can be reduced by simplifying the parting. Furthermore, the strength of the metal pipe can ensure the thickness of the resin pipe, and the bracket can be reduced in size and weight.
In addition, when a contact portion that contacts a gasket provided between the cylinder body and the bracket is provided on one end side of the metal pipe, the contact portion of the metal pipe comes into contact with the gasket so as to be liquid-tight. Is secured. Since the contact portion of the metal pipe is hardly thermally deformed, oil leakage at the bracket mounting portion of the cylinder body can be prevented.
Moreover, when the said contact part is comprised by the internal peripheral surface which forms the said oil path of the said metal pipe, a shaft seal can be comprised using the internal peripheral surface of a metal pipe. Therefore, it is not necessary to perform complicated processing on one end side of the metal pipe as the contact portion.
Moreover, when the said contact part is comprised by the flange part formed in the one end side of the said metal pipe, a surface seal can be comprised using a part of flange part of a metal pipe. Therefore, it is not necessary to provide a cylinder portion for sealing on the cylinder body, and the structure of the cylinder body can be simplified.
Moreover, when the said thread part is formed by burring, even if it is a case where the thickness of a metal pipe is comparatively thin, a thread part can be formed easily and reliably. Therefore, the thickness of the metal pipe can be reduced, and the bracket can be further reduced in size and weight.
In addition, when the said thread part protrudes toward the inner side of the said metal pipe, even if it is a complicated oil path structure, a thread part can be easily formed in arbitrary positions in the full length of a metal pipe. Moreover, when the said thread part protrudes toward the outer side of the said metal pipe, since the thread part does not protrude in the oil path of a metal pipe, the pressure loss of the oil which flows through the oil path can be suppressed.
Furthermore, when the housing part which forms a filtration chamber between the one end side of the said resin pipe and the case member of the said oil filter is integrally molded, since the component part of an oil filter can be shared by a part of bracket, Further, it is possible to further reduce the cost by reducing the number of parts.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
It is a longitudinal cross-sectional view which shows the attachment state of the filter attachment structure concerning Example 1. FIG. It is a longitudinal cross-sectional view which shows the decomposition | disassembly state of the said filter attachment structure. It is a principal part enlarged view of FIG. It is the IV-IV sectional view taken on the line of FIG. FIG. 3 is an enlarged vertical cross-sectional view of a main part of a metal pipe according to working system 1. It is a longitudinal cross-sectional view which shows the attachment state of the filter attachment structure which concerns on Example 2. FIG. It is a longitudinal cross-sectional view which shows the decomposition | disassembly state of the said filter attachment structure. It is a principal part enlarged view of FIG. It is explanatory drawing for demonstrating the screw part of another form. It is a longitudinal cross-sectional view of the bracket of another form. It is a longitudinal cross-sectional view of the conventional bracket.

  The items shown here are exemplary and illustrative of the embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

1. Bracket Embodiment 1 The bracket according to the above is a bracket for attaching an oil filter to a cylinder body of an engine, and includes a metal pipe and a resin pipe described below.
The type, configuration, shape, size, etc. of the “oil filter” are not particularly limited. Further, the configuration, shape, size, material and the like of the “cylinder main body” are not particularly limited.

The “metal pipe” is not particularly limited in structure, shape, size, material, number, etc. as long as it forms an oil passage. Examples of the material of the metal pipe include aluminum and iron.
The metal pipe is, for example, a first metal pipe that forms a return oil passage for returning the oil filtered by the oil filter to the engine, and a second oil passage that forms a feed oil passage for sending the oil from the engine to the oil filter. It can consist of metal pipes.
The oil passage may be formed in a bent shape having one or more bent portions, for example. When this oil passage is bent, the shape of the metal pipe may be, for example, one or a combination of two or more of a U shape, a V-order shape, an L shape, and the like.

As long as the “resin pipe” is integrally formed on the outer peripheral side of the metal pipe, the structure, shape, size, material and the like are not particularly limited. The resin pipe is usually integrally formed on the outer peripheral side of the metal pipe by insert molding the metal pipe. Examples of the resin pipe material include polyamide (PA) (nylon, etc.), polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PCV), acrylic resin (PMMA), polyethylene terephthalate. (PET), polyacetal (POM), polycarbonate (PC) and the like.
The resin pipe can be composed of, for example, a first resin pipe integrally formed on the outer peripheral side of the first metal pipe and a second resin pipe integrally formed on the outer peripheral side of the second metal pipe.

Embodiment 1 above. In this bracket, a screw portion for sensor attachment is formed on the metal pipe.
The screw portion may be formed by burring, for example. In this case, as the threaded portion, for example, (1) a form protruding toward the inside of the metal pipe (for example, see FIG. 1), and (2) a form protruding toward the outside of the metal pipe (for example, FIG. 9). In said (1) (2) form, the said thread part can form an internal thread on the inner peripheral side of a cylindrical part, for example.
Examples of the sensor include a sensor that detects the magnitude of hydraulic pressure, a sensor that detects the presence or absence of hydraulic pressure, and the like.

  Embodiment 1 above. As a bracket, for example, (1) a form in which a contact portion that contacts a gasket provided between the cylinder body and the bracket is provided on one end side of the metal pipe, and (2) on the other end side of the metal pipe. One type or a combination of two or more types in a form in which a contact portion that contacts a gasket provided between the oil filter and the bracket is provided. According to the above aspects (1) and (2), the liquid tightness is ensured by the contact portion of the metal pipe contacting the gasket. Since the contact portion of the metal pipe is hardly thermally deformed, oil leakage at the cylinder body or the bracket mounting portion of the oil filter can be prevented.

In the above (1) and (2) modes, as the contact portion of the metal pipe, for example, (a) the contact portion is configured by an inner peripheral surface forming an oil passage of the metal pipe (for example, FIG. 3). (Refer to FIG. 8) etc. which the contact part is comprised by the flange part formed in the one end side of a metal pipe. In the mode (a), a cylinder part provided in a bracket mounting part of a cylinder body or an oil filter is usually inserted into a metal pipe, and a gasket is provided between the outer peripheral surface of the cylinder part and the inner peripheral surface of the metal pipe. To seal the shaft. In the form (b), usually, the seal surface provided on the cylinder body or the bracket mounting portion of the oil filter is in contact with the flange portion of the metal pipe, and there is a gap between the seal surface and the flange portion of the metal pipe. Face-sealed by gasket.
In the form (1), the gasket may be provided on the cylinder body side or may be provided on the bracket side, for example. Moreover, in the said (2) form, the said gasket may be provided in the oil filter side, for example, and may be provided in the bracket side.
In the embodiments (1) and (2), examples of the gasket include an O-ring, a metal hollow O-ring, a rubber gasket, a metal gasket, a lip packing, and an oil seal.

Embodiment 1 above. For example, (1) a form in which a housing part that forms a filtration chamber with an oil filter case member is integrally formed on one end side of a resin pipe (for example, see FIG. 1), (2 ) A configuration in which a mounting portion to be mounted on one case member of a pair of case members constituting an oil filter and forming a filtration chamber is integrally formed on one end side of the resin pipe (for example, see FIG. 10). Etc.
In the form (1), for example, the housing part can be detachably attached to the case member of the oil filter.
In the mode (2), for example, the mounting portion can be detachably mounted on one case member of the oil filter.

2. Filter mounting structure Embodiment 2 The filter mounting structure according to the first embodiment is the same as the first embodiment. The oil filter is attached to the cylinder body of the engine via the bracket.

3. Method for Manufacturing Bracket Embodiment 3 The bracket manufacturing method according to the first embodiment is the same as that of the first embodiment. The bracket manufacturing method according to claim 1, wherein the screw portion for attaching the sensor to the metal pipe forming the oil passage is formed by insert molding the metal pipe on which the screw portion is formed. And a step of integrally molding the resin pipe on the outer peripheral side of the pipe.

  Hereinafter, the present invention will be described in detail with reference to the first and second embodiments with reference to the drawings.

<Example 1>
(1) Configuration of Filter Mounting Structure In the filter mounting structure 1 according to the first embodiment, an oil filter 5 is mounted on a cylinder body 4 of an engine via a bracket 3 as shown in FIGS. The oil filter 5 is an element exchange type oil filter, and includes a case member 7 into which a housing portion of a bracket 3 described later is screwed, and a filtration chamber 8 formed between the case member 7 and the housing portion. And a filter element 9 housed in the housing. The filter element 9 includes a filter medium 10 and a cylindrical protector 11 formed by mounting the filter medium 10 on the outer peripheral side. On one end side of the protector 11, a cylindrical oil passage connecting portion 11a to be inserted into a first metal pipe to be described later is formed. An O-ring 13 (illustrated as a “gasket” according to the present invention) is attached to the outer peripheral side of the oil passage connecting portion 11a.

(2) Configuration of Bracket The bracket 3 according to the first embodiment includes a first metal pipe 15, a second metal pipe 16, a first resin pipe 17, and a second resin pipe 18.

  The first metal pipe 15 is a metal pipe that forms a return oil passage 20 for returning oil from the oil filter 5 to the engine. The first metal pipe 15 is made of aluminum, and is formed in a substantially U shape as a whole. The main portion of the first metal pipe 15 has an inner diameter of about 15 mm and an outer diameter of about 16 mm. Therefore, the thickness of the first metal pipe 15 is about 0.5 mm.

The first metal pipe 15 is formed with a screw portion 23 for sensor attachment. The screw portion 23 is formed by burring, and as shown in FIG. 5, a female screw 23 b is formed on the inner peripheral side of the cylindrical portion 23 a that protrudes toward the inside of the first metal pipe 15. . Specifically, the hole formed in the first metal pipe 15 is expanded in a cylindrical shape by punching inward, and a female screw 23b is formed by a tap on the inner peripheral side of the cylindrical portion 23a to form the screw portion 23. Is done.
In the present embodiment, a hydraulic switch 24 that detects the presence or absence of hydraulic pressure is employed as a sensor attached to the screw portion 23.

  The second metal pipe 16 is a metal pipe that forms a feed oil passage 21 for sending oil from the engine to the oil filter 5. The second metal pipe 16 is made of aluminum and has a substantially U shape as a whole. The main part of the second metal pipe 16 has an inner diameter of about 15 mm and an outer diameter of about 16 mm. Therefore, the thickness of the second metal pipe 15 is about 0.5 mm.

  Further, as shown in FIGS. 1 and 2, cylindrical portions 26 and 27 formed in the cylinder body 4 are inserted into one end sides (cylinder body side) of the first and second metal pipes 15 and 16, respectively. It has become. Oil passages 26a and 27a are formed in the cylindrical portions 26 and 27, respectively. Further, O-rings 28 (illustrated as “gaskets” according to the present invention) are attached to the outer peripheral sides of the respective cylinder portions 26 and 27. The inner peripheral surface on one end side (cylinder body side) of the first and second metal pipes 15 and 16 is a contact portion 19 that contacts the O-ring 28. The contact portion 19 comes into contact (pressure contact) with the O-ring 28 to seal the shaft between the cylinder body 4 and the bracket 3. Further, the inner peripheral surface of the first metal pipe 15 on the other end side (oil filter side) is in contact (pressure contact) with the O-ring 13 of the oil passage connecting portion 11a, and the shaft seal is provided between the oil filter 5 and the bracket 3. Has been.

  The first resin pipe 17 is integrally formed on the outer peripheral side of the first metal pipe 15. The first resin pipe 17 is made of nylon, and is formed in a substantially U shape as a whole. The first resin pipe 17 has an inner diameter of about 16 mm and an outer diameter of about 19 mm. Therefore, the thickness of the first resin pipe 17 is about 1.5 mm.

  The second resin pipe 18 is integrally formed on the outer peripheral side of the second metal pipe 16. The second resin pipe 18 is made of nylon, and is formed in a substantially U shape as a whole. The second resin pipe 18 has an inner diameter of about 16 mm and an outer diameter of about 20 mm. Therefore, the thickness of the second resin pipe 18 is about 2 mm.

  A cylindrical housing portion 29 is integrally formed on one end side of the first and second resin pipes 17 and 18. On the inner peripheral surface of the housing portion 29, a female screw 29 a that is screwed into a male screw 7 a formed on the outer peripheral surface of the case member 7 is formed. The housing portion 29 of the bracket 3 is detachably attached to the case member 7 of the oil filter 5 by screwing the male screw 7a and the female screw 29a.

Next, a method for manufacturing the bracket 3 having the above configuration will be described.
First, first and second metal pipes 15 and 16 that are bent in advance are prepared. A screw part 23 is formed on a part of the first metal pipe 15 by burring. Next, these first and second metal pipes 15 and 16 are set in a mold of a molding apparatus (not shown) to perform insert molding. Then, the bracket 3 in which the first and second resin pipes 17 and 18 are integrally formed on the outer peripheral sides of the first and second metal pipes 15 and 16 is obtained.

(3) Operation of Filter Mounting Structure Next, the operation of the filter mounting structure 1 having the above-described configuration will be described.
When an oil pump (not shown) is activated by driving the engine, the oil in the engine is filtered through the oil passage 27a of the cylinder body 4 and the feed oil passage 21 of the bracket 3 as shown in FIG. 8 is supplied to the dusty side. Thereafter, the oil on the clean side of the filtration chamber 8 filtered by the filter element 9 is returned to the engine via the return oil passage 20 of the bracket 3 and the oil passage 26a of the cylinder body 4.

  On the other hand, when the filter element 9 is replaced, the case member 7 is loosened with respect to the bracket 3 and removed in the loosening direction. As a result, the protector 11 is extracted from the first metal pipe 15 and the oil filter 3 is removed from the bracket 3. Thereby, the filter medium 10 attached to the protector 11 can be exchanged.

(3) Effects of Embodiment 1 As described above, according to the bracket 3 of Embodiment 1, the screw portion 23 for sensor attachment is formed on the first metal pipe 15, so that the thermal deformation at the screw portion 23 is almost not. Therefore, it is possible to suppress a decrease in the mounting strength of the hydraulic switch 24 that is screwed to the screw portion 23. Further, the first and second metal pipes 15 and 16 forming the oil passages 20 and 21, and the first and second resin pipes 17 integrally formed on the outer peripheral side of the first and second metal pipes 15 and 16, 18, there is no need to use a disposal hole or a stopper plug even in a complicated oil passage configuration, and the cost can be reduced by simplifying the parting. Furthermore, the strength of the first and second metal pipes 15, 16 can ensure the thickness of the first and second resin pipes 17, 18, the reinforcing ribs can be reduced, and the bracket 3 can be reduced in size and weight. it can. In particular, in the bracket 103 (see FIG. 11) made entirely of resin as in the prior art, the thickness of the resin bracket is about 2.5 to 3 mm. In the first embodiment, the first metal pipe 15 and the first The total thickness of the resin pipe 17 is about 2 mm, and the total thickness of the second metal pipe 16 and the second resin pipe 18 is about 2 mm, so that the size and weight can be reduced.

  In the first embodiment, the contact portion 19 that contacts the O-ring 28 provided between the cylinder body 4 and the bracket 3 is provided on one end side of the first and second metal pipes 15 and 16. The liquid tightness is ensured by the contact portions 19 of the first and second metal pipes 15 and 16 coming into contact with the O-ring 28. Since the contact portions 19 of the first and second metal pipes 15 and 16 are hardly thermally deformed, oil leakage at the bracket mounting portion of the cylinder body 4 can be prevented.

  Further, in the first embodiment, the contact portion 19 is configured by the inner peripheral surface that forms the oil passages 20 and 21 of the first and second metal pipes 15 and 16, and thus the first and second metal pipes 15. , 16 can be used to form a shaft seal. Therefore, it is not necessary to perform complicated processing on one end side of the metal pipes 15 and 16 as the contact portion 19.

  In the first embodiment, since the screw portion 23 is formed by burring, the screw portion 23 can be easily and reliably formed even when the thickness of the first metal pipe 15 is relatively thin. it can. Therefore, the thickness of the first metal pipe 15 can be reduced, and the bracket 3 can be further reduced in size and weight.

  In the first embodiment, since the screw portion 23 protrudes toward the inside of the first metal pipe 15, the screw portion can be placed at an arbitrary position in the entire length of the first metal pipe 15 even in a complicated oil passage configuration. 23 can be formed easily.

  Further, in the first embodiment, the housing portion 29 that forms the filtration chamber 8 with the case member 7 of the oil filter 5 is integrally formed on one end side of the first and second resin pipes 17 and 18. The component parts of the oil filter 5 can be shared by a part of the bracket 3, and the number of parts can be reduced to reduce the cost.

<Example 2>
Next, the filter mounting structure 31 according to the second embodiment will be described. In the second embodiment, the same components as those in the filter mounting structure 1 of the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted, and differences will be described in detail below.

(1) Configuration of Filter Mounting Structure In the filter mounting structure 31 according to the second embodiment, as shown in FIGS. 6 and 7, the oil filter 5 is mounted on the cylinder body 34 of the engine via a bracket 33.

(2) Configuration of Bracket The bracket 33 according to the second embodiment includes a first metal pipe 35, a second metal pipe 36, a first resin pipe 37, and a second resin pipe 38.

At one end side (cylinder main body side) of the first and second metal pipes 35 and 36, flanges are in contact with the peripheral sealing surfaces 34a and 34b on the open end side of the oil passages 26a and 27a formed in the cylinder main body 34. A portion 40 is formed. In the flange portion 40, a mounting groove 40a having a substantially C-shaped longitudinal section is formed in a ring shape. An O-ring 41 (illustrated as a “gasket” according to the present invention) is mounted in the mounting groove 40a. The O-ring 41 comes into contact (pressure contact) with the seal surfaces 34 a and 34 b of the cylinder body 34, so that a surface seal is provided between the cylinder body 34 and the bracket 33.
Here, in this embodiment, it can be said that the “contact portion” according to the present invention is constituted by the mounting groove 40 a of the flange portion 40.

(3) Effects of Second Embodiment As described above, according to the bracket 33 of the second embodiment, the first and second metal pipes 35 are provided in addition to the operations and effects similar to those of the bracket 3 of the first embodiment. 36, the O-ring 41 of the flange portion 40 comes into contact (pressure contact) with the seal surfaces 34a and 34b of the cylinder body 34, so that liquid tightness between the cylinder body 34 and the bracket 33 is ensured. Since these first and second metal pipes 15 and 16 are hardly thermally deformed, oil leakage at the bracket mounting portion of the cylinder body 34 can be prevented. Further, since the surface sealing is performed by using the flange portions 40 of the first and second metal pipes 15 and 16, it is not necessary to provide a cylindrical portion for shaft sealing in the cylinder body 34, and the structure of the cylinder body 34. Can be simplified.

  In the present invention, the present invention is not limited to the first and second embodiments, and various modifications can be made within the scope of the present invention depending on the purpose and application. In other words, in the first and second embodiments, the first metal pipes 15 and 35 are illustrated with the screw portions 23 projecting inward, but the present invention is not limited thereto. For example, as shown in FIG. It is good also as the screw part 43 which protrudes toward the outer side of the pipes 15 and 35. FIG. Thereby, since the screw part 43 does not protrude in the oil passage of the first metal pipes 15 and 35, the pressure loss of the oil flowing through the oil passage can be suppressed.

  In the first and second embodiments, the brackets 3 and 33 in which the housing portion 29 is integrally formed are illustrated. However, the present invention is not limited to this. For example, as shown in FIG. 10, one end side of the first resin pipe 45 Alternatively, the mounting portion 50 to be mounted on one case member 49a of the pair of case members 49a and 49b constituting the oil filter 47 and forming the filtration chamber 48 may be formed as a bracket 44 integrally formed. In this case, the mounting portion 50 of the bracket 44 is detachably attached to the case member 49a of the oil filter by a screw structure, a bayonet structure, or the like. Further, a cylindrical portion 53 formed in one case member 49 a is inserted into the first metal pipe 51, and an O-ring 54 attached to the outer peripheral side of the cylindrical portion 53 is an inner peripheral surface of the first metal pipe 51. The shaft between the oil filter 47 and the bracket 44 is sealed. In FIG. 10, the second metal pipe and the second resin pipe are not shown.

  In the first embodiment, the O-ring 28 is provided on the outer peripheral side of the cylinder portions 26 and 27 of the cylinder body 4. However, the present invention is not limited to this, and for example, the first and second metal pipes 15 and 16. An O-ring 28 may be provided on the inner peripheral side.

  In the second embodiment, the O-ring 41 is provided on the flange portion 40 of the first and second metal pipes 35 and 36. However, the present invention is not limited to this. For example, the seal surfaces 34a and 34b of the cylinder body 34 are provided. An O-ring 41 may be provided.

  In the first and second embodiments, the O-ring 13 is provided in the oil passage coupling portion 11a of the oil filter 5. However, the present invention is not limited to this. For example, the O-ring is provided on the inner peripheral side of the first metal pipe 15. 13 may be provided.

  Moreover, in the said Example 1 and 2, although the screw part 23 for sensor attachment was provided in the 1st metal pipes 15 and 35 which form the return oil path 20, it is not limited to this, For example, a feed oil path The threaded portion 23 may be provided on the second metal pipes 16, 36 that form 21.

  In the first and second embodiments, the cylindrical portion 23a is formed by the punch and then the female screw 23b is formed by the tap. However, the present invention is not limited to this. For example, the cylindrical portion 23a is formed by the punch. The female screw 23b may be formed.

  Further, in the first and second embodiments, the threaded portion 23 is formed on the first metal pipes 15 and 35 by burring. However, the present invention is not limited to this. For example, the first metal pipes 15 and 35 are different from each other. A screw part may be prepared and the screw part may be retrofitted to the first metal pipes 15 and 35.

  The foregoing examples are for illustrative purposes only and are not to be construed as limiting the invention. Although the invention has been described with reference to exemplary embodiments, it is to be understood that the language used in the description and illustration of the invention is illustrative and exemplary rather than limiting. As detailed herein, modifications may be made in its form within the scope of the appended claims without departing from the scope or spirit of the invention. Although specific structures, materials and examples have been referred to in the detailed description of the invention herein, it is not intended to limit the invention to the disclosure herein, but rather, the invention is claimed. It covers all functionally equivalent structures, methods and uses within the scope of.

  The present invention is not limited to the embodiments described in detail above, and various modifications or changes can be made within the scope of the claims of the present invention.

  It is widely used as a technique for attaching an oil filter (preferably an element exchange type oil filter) to an engine cylinder body.

  1, 31, 45; Filter mounting structure, 3, 33, 44; Bracket, 4, 34; Cylinder body, 5; Oil filter, 7; Case member, 8; Filtration chamber, 15, 35; , 36; second metal pipe, 17, 37; first resin pipe, 18, 38; second resin pipe, 19; contact portion, 20; return oil passage, 21; feed oil passage, 23, 43; 24; Hydraulic switch, 28; O-ring, 29; Housing part, 40; Flange part, 41; O-ring.

Claims (7)

A bracket for attaching an oil filter to the cylinder body of an engine,
A metal pipe forming an oil passage;
A resin pipe integrally formed on the outer peripheral side of the metal pipe,
A bracket characterized in that a screw portion for sensor attachment is formed on the metal pipe.   The bracket according to claim 1, wherein a contact portion that contacts a gasket provided between the cylinder body and the bracket is provided on one end side of the metal pipe.   The bracket according to claim 2, wherein the contact portion is configured by an inner peripheral surface that forms the oil passage of the metal pipe.   The bracket according to claim 2, wherein the contact portion includes a flange portion formed on one end side of the metal pipe.   The bracket according to any one of claims 1 to 4, wherein the screw portion is formed by burring.   The bracket according to any one of claims 1 to 5, wherein a housing portion that forms a filtration chamber with the case member of the oil filter is integrally formed on one end side of the resin pipe. A bracket according to any one of claims 1 to 6, comprising:
The filter mounting structure, wherein the oil filter is mounted to a cylinder body of the engine via the bracket.

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