JP2023044897A - Connection structure of pipe member - Google Patents

Abstract

To connect two pipe members, each of which is routed in two spaces partitioned by a vehicle body panel, with a simple structure and at low cost.SOLUTION: Two pipe members 5, 6 are connected to both ends of a connecting pipe 10 respectively, and the connecting pipe 10 has an intermediate pipe part 11 and two extension pipe parts 12, 13. The intermediate pipe part 11 is inserted through a through hole 23 of a bracket 20, is fixed to the bracket 20 at a peripheral part of the through hole 23, and is inserted through an opening hole 7 of a vehicle body panel 1 in a bracket mounted state in which the bracket 20 is mounted on the vehicle body panel 1. The two extension pipe parts 12, 13 extend integrally from both ends of the intermediate pipe part 11 and are disposed in two spaces 3, 4 respectively in a connecting pipe assembled state in which the intermediate pipe part 11 is fixed to the bracket 20 in the bracket mounted state. The connecting pipe 10 is fixed to the bracket 20 with the two extension pipe parts 12, 13 in an inclined posture with respect to the vehicle body panel 1 in the bracket mounted state.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a connection structure that connects two pipe members wired in two spaces partitioned by a vehicle body panel.

In Patent Document 1, a connection joint is attached to a dash panel, and a cabin side brake pipe arranged on the cabin side and a cabin outside brake pipe arranged on the cabin side are connected to the connection joint. A brake pipe joint structure is described.

Japanese Patent Application Laid-Open No. 2001-310765

As in Patent Document 1, a connector in which two pipe members (a cabin-side brake pipe and a cabin-side brake pipe) respectively routed in two spaces partitioned by a vehicle body panel (dash panel) are attached to the vehicle body panel. A structure in which connections are made via (connection joints) requires a connector, which may lead to complication of the structure and an increase in cost.

Accordingly, an object of the present disclosure is to provide a pipe member connection structure that can inexpensively connect two pipe members that are respectively wired in two spaces partitioned by a vehicle body panel.

In order to achieve the above object, a first aspect of the present disclosure is a connection structure for connecting two pipe members respectively wired in two spaces partitioned by a vehicle body panel, comprising an opening hole, a bracket and a through hole and a connecting pipe.

The opening hole is formed in the vehicle body panel and communicates the two spaces. The bracket is attached to the vehicle body panel so as to cover the opening. The through hole is formed in the bracket, and communicates the two spaces through the opening hole in a state in which the bracket is attached to the vehicle body panel. The connecting tube has an intermediate tube portion and two extension tube portions. The intermediate pipe portion is inserted through the through-hole, fixed to the bracket at the peripheral edge of the through-hole, and inserted through the opening of the vehicle body panel in the bracket-mounted state. The two extension pipe portions integrally extend from both ends of the intermediate pipe portion, and are respectively arranged in the two spaces in a connecting pipe assembled state in which the intermediate pipe portion is fixed to the bracket in a bracket-mounted state. The two pipe members are connected to both ends of the connecting pipe. The connection pipe is fixed to the bracket in such a manner that the two extension pipe portions are inclined with respect to the vehicle body panel in the bracket mounted state.

In the above configuration, the two pipe members are connected via the connecting pipe, so that the structure can be simplified and the cost can be reduced as compared with the case of connecting via the connector.

When arranging another member (for example, another panel) in one or both of the two spaces so as to face the vehicle body panel, it is necessary to arrange the other member so as not to interfere with the connecting pipe. If the pipe portion is perpendicular to the vehicle body panel, the distance from the vehicle body panel to the tip of the extension pipe portion becomes long (the amount of protrusion of the connecting pipe from the vehicle body panel in the two spaces increases), so other The member may have to be placed further from the body panel than desired. On the other hand, in the above configuration, since the two extension pipes are not orthogonal to the vehicle body panel but are inclined, compared to the case where the extension pipes are orthogonal to the vehicle body panel, the two spaces are more flexible. It is possible to reduce the amount of protrusion of the connecting pipe from the vehicle body panel, and to arrange other members at desired positions without interfering with the connecting pipe.

A second aspect of the present disclosure is the pipe member connection structure of the first aspect, wherein the connecting pipe is bent at the intermediate pipe portion so that the angles of the two extension pipe portions with respect to the bracket are different, and the connecting pipe In the assembled state, one angle of the two extension pipes with respect to the vehicle body panel is smaller than the other angle.

When fixing the intermediate pipe portion of the connection pipe to the bracket with brazing material or adhesive, the closer the angle of the extension pipe portion to the bracket is, the easier the fixing work (brazing or gluing work) becomes. The smaller the angle of the extension tube with respect to the bracket (the extension tube gets closer to the bracket), the more difficult the fixing work becomes. For this reason, for example, if one of the two spaces needs to have a smaller amount of projection of the connecting pipe from the vehicle body panel than the other space, when fixing the connecting pipe to the bracket, The intermediate pipe portion is fixed to the bracket from the side of the extension pipe portion with the larger angle, and the bracket is attached to the vehicle body panel so that the angle of the extension pipe portion with respect to the vehicle body panel is smaller in one space than in the other space. As a result, the connection pipe can be easily fixed to the bracket, and the amount of protrusion of the connection pipe from the vehicle body panel in one space can be preferably reduced.

According to the pipe member connection structure of the present disclosure, it is possible to inexpensively connect two pipe members that are routed in two spaces partitioned by a vehicle body panel with a simple structure.

1 is a perspective view of a pipe member connection structure according to an embodiment of the present invention; FIG. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1; 3 is an enlarged view of a main part of FIG. 2; FIG. It is the top view which looked FIG. 1 from the arrow IV direction.

An embodiment of the present invention will be described below with reference to the drawings. In the following description, the front-rear direction means the front-rear direction of the vehicle. FIG. 1 also shows the bracket 20 and the partially broken front panel 1 with the brazing material 8 for fixing the connecting pipe 10 omitted.

As shown in FIGS. 1 and 2, at the front of the cab of the vehicle, a front panel (vehicle body panel) 1 stands up along the width direction of the vehicle to partition a rear interior space 3 and a front exterior space 4 of the vehicle. It is fixed to the vehicle body side. A radiator grille 2 is fixed to the vehicle body side in a vehicle exterior space 4 in a state of being erected along the vehicle width direction. The radiator grille 2 and the front panel 1 face each other with a space therebetween in the front-rear direction.

Flexible tubes (pipe members) 5 and 6 for pumping fluid between the two spaces 3 and 4 are arranged in the vehicle interior space 3 and the vehicle exterior space 4. , 6 communicate via a connecting tube 10 . In this embodiment, one tube 5 and one tube 6 are routed in each of the vehicle interior space 3 and the vehicle exterior space 4, thereby forming a fluid pressure feeding path between the vehicle interior space 3 and the vehicle exterior space 4. be done. The fluid pumping path is a path for pumping air (pressurized air) for on/off control of a vehicle brake (not shown) between the vehicle exterior space 4 and the vehicle interior space 3 . In the following description, the tube 5 piped to the vehicle interior space 3 may be referred to as the vehicle interior tube, and the tube 6 piped to the vehicle exterior space 4 may be referred to as the vehicle exterior tube.

The tubes 5 and 6 are flexible tubular bodies for pressure-feeding a fluid made of resin or the like. As an example of the fluid pumped by the tubes 5 and 6, air is applied in this embodiment, but it is also possible to apply a liquid such as oil. In place of the flexible tubes 5 and 6, non-flexible pipes made of metal or the like may be used.

The front panel 1 is formed with an elongated opening 7 (see FIG. 4) that communicates between the vehicle interior space 3 and the vehicle exterior space 4, and the opening 7 is covered from one of the two spaces 3 and 4. A bracket 20 is attached to the . The bracket 20 is attached to the surface of the front panel 1 on the vehicle interior space 3 side, and covers the opening hole 7 from the vehicle interior space 3 side. Note that the bracket 20 may be attached to the surface of the front panel 1 on the vehicle exterior space 4 side.

The bracket 20 is a metal plate press-molded to have a hat-shaped cross section, and is bent into an L shape from a rectangular plate-shaped connection pipe support portion 21 and two opposite edges of the peripheral edges of the connection pipe support portion 21. It has two flange portions 22 integrally. The bracket 20 overlaps the two flange portions 22 on the surface of the front panel 1 on the vehicle interior space 3 side in a posture in which the connection pipe support portion 21 is separated from the front panel 1, and bolts the two flange portions 22 and the front panel 1 together. It is attached and fixed to the front panel 1 by fastening with 30 and nuts 31 . The nut 31 is a weld nut fixed to the flange portion 22 . The connecting pipe support portion 21 stands substantially parallel to the front panel 1 in the bracket-attached state in which the bracket 20 is attached to the front panel 1 . The bracket 20 may be formed by resin injection molding or the like. Alternatively, the bracket 20 may be fixed to the front panel 1 by rivets or the like. Further, the connection pipe support portion 21 may be inclined with respect to the front panel 1 in the bracket mounted state.

A connecting pipe support portion 21 of the bracket 20 is formed with a circular through hole 23 that communicates the two spaces 3 and 4 via the opening 7 in the bracket mounted state. In the bracket-attached state, the front surface of the connection pipe support portion 21 is exposed to the vehicle interior space 3 , and the rear surface of the connection pipe support portion 21 faces the front panel 1 . The through-hole 23 is arranged so as to overlap the opening 7 in the front-rear direction in the bracket-mounted state, and the hole diameter of the through-hole 23 is slightly larger than the outer diameter of the connecting pipe 10 .

An elastic sealing material 24 such as a sponge is fixed to the back surface of the connection pipe support portion 21 by adhesion or the like. The elastic seal member 24 has a rectangular frame shape surrounding the opening hole 7 of the front panel 1 in the bracket mounted state (see FIG. 4). prevent the movement of water, foreign matter, etc.

The connection pipe 10 is an inflexible metal pipe, and includes an intermediate pipe portion 11 bent at a predetermined angle exceeding a right angle, and two extension pipe portions 12 and 13 linearly extending from both ends of the intermediate pipe portion 11. integrally has The intermediate pipe portion 11 is inserted through the through hole 23 of the bracket 20 and fixed to the connection pipe support portion 21 at the peripheral edge portion of the through hole 23 by soldering. Brazing is performed from the surface side of the connecting pipe support portion 21 , and the gap between the outer peripheral surface of the intermediate pipe portion 11 and the inner peripheral surface of the through hole 23 is filled with the brazing material 8 . Alternatively, the connection pipe 10 and the bracket 20 may be made of non-flexible resin, and the connection pipe 10 may be fixed to the bracket 20 with an adhesive.

When the connection pipe 10 is fixed to the bracket 20 and the bracket 20 is attached to the front panel 1, the intermediate pipe portion 11 is inserted through the opening hole 7 of the front panel 1, and the two extension pipe portions 12, 13 are arranged in the vehicle interior space 3 and the vehicle exterior space 4, respectively. That is, the intermediate pipe portion 11 of the connection pipe 10 has a curved portion, a portion inserted through the through hole 23 of the bracket 20 in the bracket mounted state, and an opening hole 7 of the front panel 1 in the connected pipe assembled state. and a portion for inserting the The opening hole 7 of the front panel 1 is set to a size and shape that do not come into contact with the connecting pipe 10 when the connecting pipe is assembled. In the following description, the extension pipe portion 12 piped to the vehicle interior space 3 may be referred to as the vehicle interior extension pipe portion, and the extension pipe portion 13 piped to the vehicle exterior space 4 may be referred to as the vehicle exterior extension pipe portion. be.

One end of the vehicle interior tube 5 is connected to the distal end of the vehicle interior extension pipe portion 12 , and one end of the vehicle exterior tube 6 is connected to the distal end of the vehicle exterior extension pipe portion 13 . One end of the tubes 5 and 6 has an inner diameter slightly smaller than the outer diameter of the distal ends of the extension pipes 12 and 13 . The two tubes 5, 6 are connected by inserting the distal ends of the extension tubes 12, 13 into one ends of the tubes 5, 6 and clamping the outer peripheral surfaces of the one ends of the tubes 5, 6 with an annular clamp 9. are connected to both ends of the connecting pipe 10 (see FIG. 2). In addition, the connection pipe 10 may have a pipe portion (second extension pipe portion) that bends and extends from the distal ends of the extension pipe portions 12 and 13 . In this case, the tubes 5 and 6 are connected to the tip of the second extension tube.

As shown in FIGS. 2 and 3, the connection pipe 10 has two extension pipe portions 12 and 13 with different angles with respect to the connection pipe support portion 21, and when the bracket is attached, the two extension pipe portions 12 and 13 are attached to the front panel. 1, and the angle of the interior extension pipe portion 12 with respect to the front panel 1 (interior interior pipe angle θA) and the angle of the exterior extension pipe portion 13 (interior exterior pipe angle θA) with respect to the front panel 1 in the bracket mounted state. It is fixed to the bracket 20 in a posture different from the angle θB). That is, in the connection pipe assembled state, the two extension pipe portions 12 and 13 are not orthogonal to the front panel 1 but are inclined, and the interior pipe angle θA is different from the exterior pipe angle θB. Since the connection pipe support portion 21 in the bracket mounted state is substantially parallel to the front panel 1, the angle of the extension pipe portions 12 and 13 with respect to the connection pipe support portion 21 and the front panel in the connection pipe assembled state will be described below. 1, the angle of the vehicle interior extension pipe portion 12 is referred to as the vehicle interior inner pipe angle θA, and the angle of the vehicle exterior extension pipe portion 13 with respect to the connection pipe support portion 21 is referred to as the vehicle interior angle θA. It may be referred to as the outdoor tube angle θB.

In the vehicle exterior space 4, the distance from the front panel 1 to the tip of the vehicle exterior extension pipe portion 13 (the projection of the connection pipe 10 from the front panel 1 amount) must be set. That is, it is necessary to suppress the amount of projection of the connecting pipe 10 from the front panel 1 in the space 4 outside the vehicle compartment more than in the space 3 inside the vehicle compartment. Therefore, the connecting pipe 10 is fixed to the bracket 20 in a posture (0°<θB<θA<90°) where the exterior pipe angle θB in the connecting pipe assembled state is smaller than the interior pipe angle θA. be.

According to this embodiment, the two tubes 5 and 6 are connected via the connecting pipe 10, so that the structure can be simplified and the cost can be reduced as compared with the case of connecting via a connector.

In the space 4 outside the vehicle, the radiator grille 2 must be arranged so as not to interfere with the connecting pipe 10 and the tube 6 outside the vehicle. If the exterior extension pipe portion 13 of the connecting pipe 10 is perpendicular to the front panel 1, the projection amount of the exterior extension pipe portion 13 from the front panel 1 increases, so the radiator grille 2 is moved from the desired position. may also have to be spaced apart from the front panel 1 . On the other hand, in the present embodiment, the exterior extension pipe portion 13 is not perpendicular to the front panel 1 but is inclined. In comparison, the amount of protrusion of the exterior extension pipe portion 13 from the front panel 1 can be reduced, and the radiator grille 2 can be arranged at a desired position without interfering with the connection pipe 10 and the exterior tube 6. . Further, in the vehicle interior space 3 as well, since the vehicle interior extension pipe portion 12 is not orthogonal to the front panel 1 but is inclined, when the vehicle interior extension pipe portion 12 is orthogonal to the front panel 1 Compared to , the amount of protrusion of the interior extension tube portion 12 from the front panel 1 can be reduced.

When fixing the intermediate pipe portion 11 of the connection pipe 10 to the bracket 20 with the brazing material 8 or adhesive, the fixing work (brazing work or adhesion work) is required as the angle of the extension pipe portions 12 and 13 with respect to the bracket 20 is closer to a right angle. The smaller the angle of the extension pipes 12 and 13 with respect to the bracket 20 (the closer the extension pipes 12 and 13 are to the bracket 20), the more difficult the fixing work becomes. As described above, in the present embodiment, it is necessary to suppress the projection amount of the connection pipe 10 from the front panel 1 in the vehicle exterior space 4 more than in the vehicle exterior space 3. Therefore, the vehicle exterior pipe angle θB is The connection pipe 10 is fixed to the bracket 20 in a posture that is smaller than the vehicle interior pipe angle θA. Since the interior pipe angle θA is larger than the exterior pipe angle θB, when fixing the connection pipe 10 to the bracket 20, the intermediate pipe portion 11 should is fixed to the bracket 20. Therefore, the connection pipe 10 can be easily fixed to the bracket 20, and the projection amount of the connection pipe 10 from the front panel 1 in the vehicle exterior space 4 can be preferably reduced.

As described above, the present invention has been described based on the above embodiments, but the present invention is not limited to the contents of the above embodiments, and can be appropriately modified without departing from the scope of the present invention. . In other words, all other embodiments, examples, operation techniques, etc. made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention.

For example, in the present embodiment, one bracket 20 connects one system of fluid pressure-feeding paths. good too. When one bracket 20 can be used to connect a plurality of fluid pumping paths, the number of parts and man-hours can be reduced compared to the case where a bracket is provided for each system.

In this embodiment, the connection pipe 10 that bends at the intermediate pipe portion 11 has been described. It may be a connecting pipe that continues in a shape.

In the present embodiment, the structure in which the front panel 1 partitions the vehicle interior space 3 and the vehicle exterior space 4 has been described. The two spaces may be spaces other than those described above.

INDUSTRIAL APPLICABILITY The present invention can be applied to various vehicles as a structure for connecting two pipe members routed in two spaces partitioned by a vehicle body panel.

1: Front panel (body panel)
2: Radiator grille 3: Vehicle interior space 4: Vehicle exterior space 5: Tube (vehicle interior tube, pipe member)
6: Tube (exterior tube, tube member)
7: Opening hole 8: Brazing material 9: Clamp 10: Connection pipe 11: Intermediate pipe portion 12: Extension pipe portion (interior extension pipe portion)
13: Extension pipe section (extension pipe section outside the passenger compartment)
20: Bracket 21: Connection pipe support portion 22: Flange portion 23: Through hole 24: Elastic sealing material 30: Bolt 31: Nut

In order to achieve the above object, a first aspect of the present disclosure is a connection structure for connecting two pipe members respectively wired in two spaces partitioned by a vehicle body panel, comprising an opening hole and a rigid bracket. A through hole and a connecting pipe are provided.

The opening hole is formed in the vehicle body panel and communicates the two spaces. The bracket integrally has a plate-shaped flange portion that is fixed by a connecting member while overlapping one surface of the vehicle body panel, and a plate-shaped connection pipe support portion that is separated from the vehicle body panel and faces the opening hole. By fixing the flange portion to one surface of the vehicle body panel, the connection pipe support portion is attached to the vehicle body panel so as to cover the opening. The through hole is formed in the connection pipe support portion of the bracket, and communicates the two spaces through the opening hole in the bracket mounted state in which the bracket is mounted on the vehicle body panel. The connecting tube has an intermediate tube portion and two extension tube portions. The intermediate pipe portion is inserted through the through-hole, fixed to the connection pipe support portion of the bracket by a fixing material at the peripheral edge of the through-hole, and inserted through the opening of the vehicle body panel in the bracket-mounted state. The two extension pipe portions integrally extend from both ends of the intermediate pipe portion, and are respectively arranged in the two spaces in a connecting pipe assembled state in which the intermediate pipe portion is fixed to the bracket in a bracket-mounted state. The two pipe members are connected to both ends of the connecting pipe. The connection pipe is fixed to the bracket in such a manner that the two extension pipe portions are inclined with respect to the vehicle body panel in the bracket mounted state.

A second aspect of the present disclosure is the pipe member connection structure of the first aspect, wherein the connecting pipe is bent at the intermediate pipe portion so that the angles of the two extension pipe portions with respect to the bracket are different, and the connecting pipe In the assembled state, one angle of the two extension pipes with respect to the vehicle body panel is smaller than the other angle. The connection pipe support portion faces one surface of the vehicle body panel in a substantially parallel manner in a bracket-mounted state. The intermediate pipe portion of the connection pipe is inserted through the through hole and fixed to the connection pipe support portion on the side where the extension pipe portion extending at a larger angle with respect to the vehicle body panel of the two extension pipe portions extends, and the extension pipe portion with a smaller angle extends. through the opening on the side.

The bracket 20 is a metal plate press-molded to have a hat-shaped cross section, and is bent into an L shape from a rectangular plate-shaped connection pipe support portion 21 and two opposite edges of the peripheral edges of the connection pipe support portion 21. It has two flange portions 22 integrally. The bracket 20 joins the two flange portions 22 and the front panel 1 by overlapping the two flange portions 22 on the surface of the front panel 1 on the vehicle interior space 3 side in a posture in which the connection pipe support portion 21 is separated from the front panel 1. It is attached and fixed to the front panel 1 by fastening with bolts 30 and nuts 31 as members . The nut 31 is a weld nut fixed to the flange portion 22 . The connecting pipe support portion 21 stands substantially parallel to the front panel 1 in the bracket-attached state in which the bracket 20 is attached to the front panel 1 . The bracket 20 may be formed by resin injection molding or the like. Alternatively, the bracket 20 may be fixed to the front panel 1 by a rivet or the like as a connecting member . Further, the connection pipe support portion 21 may be inclined with respect to the front panel 1 in the bracket mounted state.

The connection pipe 10 is an inflexible metal pipe, and includes an intermediate pipe portion 11 bent at a predetermined angle exceeding a right angle, and two extension pipe portions 12 and 13 linearly extending from both ends of the intermediate pipe portion 11. integrally has The intermediate pipe portion 11 is inserted through the through hole 23 of the bracket 20 and fixed to the connection pipe support portion 21 at the peripheral edge portion of the through hole 23 by soldering. Brazing is performed from the surface side of the connecting pipe support portion 21, and the gap between the outer peripheral surface of the intermediate pipe portion 11 and the inner peripheral surface of the through hole 23 is filled with the brazing material 8 as a fixing material . Alternatively, the connection pipe 10 and the bracket 20 may be made of non-flexible resin, and the connection pipe 10 may be fixed to the bracket 20 with an adhesive as a fixing material .

Claims (2)

A connection structure for connecting two pipe members respectively wired in two spaces partitioned by a vehicle body panel,
an opening hole formed in the vehicle body panel and communicating the two spaces;
a bracket attached to the vehicle body panel so as to cover the opening;
a through hole formed in the bracket and communicating the two spaces through the opening hole in a bracket mounted state in which the bracket is mounted on the vehicle body panel;
an intermediate pipe portion that is inserted through the through hole, is fixed to the bracket at the periphery of the through hole, and is inserted through the opening hole of the vehicle body panel in the bracket mounted state; a connection pipe having two extension pipe portions respectively arranged in the two spaces in a connection pipe assembled state in which the intermediate pipe portion is fixed to the bracket in the bracket mounted state;
The two pipe members are connected to both ends of the connection pipe,
The pipe member connection structure, wherein the connecting pipe is fixed to the bracket in such a manner that the two extension pipe portions are inclined with respect to the vehicle body panel in the bracket mounted state. The pipe member connection structure according to claim 1,
the connection pipe is bent at the intermediate pipe portion so that the angles of the two extension pipe portions with respect to the bracket are different;
The pipe member connection structure, wherein one angle of the two extension pipe portions with respect to the vehicle body panel is smaller than the other angle in the connection pipe assembled state.

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