JP2019104342A - Pipe structure of radiator for vehicles - Google Patents

Abstract

To upgrade the rigidity of a pipe, which is shaped to jut out of a tank, of a pipe structure of a radiator for vehicles.SOLUTION: A pipe structure of a radiator for vehicles 30 includes a pipe 20 that juts out of an upper tank 16 of the radiator for vehicles and is used to attach a hose 32, a first rib 42 disposed to extend in a circumferential direction of the periphery of the pipe 20, a second rib 44 disposed to extend in the circumferential direction of the periphery of the pipe 20 at a predetermined distance in an axial direction from the first rib 42, and a third rib 46 disposed to extend in the axial direction of the periphery of the pipe 20 while being integrated into the first rib 42 and second rib 44.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a pipe structure of a radiator for a vehicle, and more particularly, to a pipe structure for attaching a hose by protruding from a tank portion of the radiator for a vehicle.

  The vehicle radiator includes a tube through which a refrigerant flows, fins that receive heat from the tube and dissipate it into the open air, and upstream and downstream tank portions respectively provided on the upstream side and downstream side of the tube. In the upstream side tank portion and the downstream side tank portion, pipes for hose attachment are provided respectively.

  In Patent Document 1, a hose formed in a tubular shape using an elastic material such as rubber is attached to a pipe which is a cylindrical port that protrudes to the rear of the vehicle in communication with the inside of the tank portion on the side of the radiator tank portion. The configuration to be connected is described. And the clip which ties and secures a hose and a pipe on the outer periphery of a hose is fitted outside.

JP 2008-19778 A

  When a hose is fitted into a pipe protruding from a tank portion of a radiator and fixed with a clip, stress is applied to the protruding pipe due to the movement of the hose due to the vibration of the vehicle. Insufficient rigidity of the pipe may cause damage or the like. Then, the pipe structure of the radiator for vehicles which raises the rigidity of the pipe of the shape which protruded from the tank part is demanded.

  A pipe structure of a radiator for a vehicle according to the present disclosure comprises: a pipe projecting from a tank portion of the radiator for a vehicle to attach a hose; a first rib portion extending in a circumferential direction of an outer peripheral surface of the pipe; A second rib portion extending in the circumferential direction of the outer peripheral surface of the pipe at a predetermined predetermined distance in the axial direction from the rib portion, and a first rib portion and a second rib portion integrated with the second rib portion And a third rib portion extending in the axial direction of the outer circumferential surface.

  According to the above configuration, in addition to the first rib portion and the second rib portion extending in the circumferential direction along the outer peripheral surface of the pipe, it axially extends between the first rib portion and the second rib portion to be integrated A third rib section is provided. By this, the rigidity of the pipe which protrudes from the tank portion is improved. Further, since the axially extending third rib portion can be used as a mark of the clip fixing position when the hose is inserted into the pipe and fixed by the clip, the fixing of the hose to the pipe is stabilized.

  According to the pipe structure of the above-described vehicle radiator, the rigidity of the pipe protruding from the tank portion is improved.

It is a perspective view of a radiator for vehicles which has a pipe structure of a radiator for vehicles concerning an embodiment. It is a perspective view showing pipe structure of a radiator for vehicles concerning an embodiment. FIG. 3 is a cross-sectional view including the line C-C in FIG. 2 and cut along the vehicle vertical direction. It is a trihedral view about the compound rib part in the pipe structure of the radiator for vehicles concerning an embodiment. Fig.4 (a) is a side view, (b) is a top view, (c) is a front view.

  Hereinafter, embodiments according to the present disclosure will be described in detail using the drawings. In the following, a radiator for a refrigerant for cooling an engine mounted on a vehicle will be described as a radiator for a vehicle, but this is an example for explanation and it may be a radiator for a vehicle, for example, a refrigerant for an intercooler It may be a radiator for Although the pipe structure provided in the upper tank portion of the downflow type radiator will be described below, this is an illustrative example, and may be a pipe structure provided in the lower tank portion. Further, since it may be a vehicle radiator, it may be a cross flow type radiator. In the case of the cross flow type radiator, it may be a pipe structure provided in the upstream tank portion or a pipe structure provided in the downstream tank portion. In the above, the pipe projecting vertically from the upper tank portion is described, but this is an example for explanation, and can be appropriately changed according to the specification of the vehicle radiator and the like.

  The shapes, materials, and the like described below are examples for the purpose of explanation, and can be changed as appropriate according to the specification of the vehicle front structure and the like. Further, in the following, the same reference numeral is given to the same element in all the drawings, and the overlapping description is omitted.

  FIG. 1 is a perspective view of a vehicle radiator 10. Hereinafter, the vehicle radiator 10 will be referred to as a radiator 10 unless otherwise specified.

  In each of the following drawings, the vehicle longitudinal direction, the vehicle width direction, and the vehicle vertical direction are appropriately shown. In the case of distinguishing between two directions in the longitudinal direction of the vehicle, the forward direction of the vehicle is the front side of the vehicle, and the reverse direction is the rear side of the vehicle. When the two directions in the vehicle width direction are to be distinguished, the right side is the vehicle right side direction, and the left side is the vehicle left direction, facing the front side of the vehicle. When two directions in the vertical direction of the vehicle are distinguished, the upper side with respect to the road surface is the upper side of the vehicle, and the direction of the road side is the lower side of the vehicle. In some cases, the vehicle front side, the vehicle rear side, the vehicle right side, the vehicle left side, the vehicle upper side, and the vehicle lower side are referred to as front side, rear side, right side, left side, upper side, and lower side, respectively.

  The radiator 10 is a heat exchanger for a refrigerant that cools an engine mounted on a vehicle. Radiator 10 receives traveling wind from a grille (not shown) provided on the front side of the vehicle in the front structure of the vehicle, and uses the wind to heat the heat of the engine cooling refrigerant heated in the engine (not shown) in the open air To cool the refrigerant and return it to the engine side. The radiator 10 is disposed on the front side of the engine just behind the grille of the front structure of the vehicle. FIG. 1 is a perspective view of the radiator 10 as viewed from the engine side which is the rear side of the vehicle. In the radiator 10, the vehicle front side is the grille side that receives the traveling wind, and the vehicle rear side is the engine side.

  The radiator 10 includes a core portion 12 having a substantially rectangular flat shape, side plates 14 and 15 provided on both side surfaces of the core portion 12, an upper tank portion 16 disposed on an upper side surface of the core portion 12, and the core portion 12. And a lower tank portion 18 disposed on the lower side of The upper tank portion 16 is provided with an inflow side pipe 20 for receiving the refrigerant from the engine, and the lower tank portion 18 is provided with an outflow side pipe 22 for delivering the refrigerant to the engine.

  In the radiator 10, the hot refrigerant from the engine enters the inside of the upper tank portion 16 through the inflow side pipe 20 using the hose 32 (see FIG. 2 and FIG. 3), and receives the core portion 12 receiving the traveling wind of the vehicle. It flows from the upper side to the lower side and is exchanged with the outside air to be cooled. The cooled refrigerant enters the inside of the lower tank portion 18 and is returned to the engine via the outflow side pipe 22 using a hose (not shown). The radiator 10 is a downflow type in which the refrigerant flows from the upper tank portion 16 toward the lower tank portion 18.

  The core portion 12 includes a plurality of tubes 24 through which the refrigerant flows from the upper tank portion 16 toward the lower tank portion 18, and fins 26 disposed between the adjacent tubes 24 for dissipating the heat of the tubes 24 to the outside air. . The shape of the tube 24 is flat and the material is brass or aluminum. The structure of the fins 26 is a plate-like plate fin or a folded corrugated fin, and the material is a thin metal plate such as a copper thin plate, a brass thin plate or an aluminum thin plate.

  The upper tank portion 16 is a refrigerant tank on the upstream side with respect to the core portion 12, and the lower tank portion 18 is a refrigerant tank on the downstream side with respect to the core portion 12. The upper tank portion 16 and the lower tank portion 18 use a resin tank formed by molding a resin into a predetermined shape. The material of the resin tank is 66 nylon mixed with glass wool. Instead of this, a brass tank in which brass is press-formed into a predetermined shape may be used.

  The inflow side pipe 20 vertically projects rearward from the upper tank portion 16 and is a hose mounting pipe for mounting the hose 32. Similarly, the outflow side pipe 22 projects rearward from the lower tank portion 18 and is a hose attachment pipe for attaching a hose. The inflow side pipe 20 is integrally molded with the resin upper tank portion 16. Instead of this, it may be formed separately from the upper tank portion 16 and attached to the upper tank portion 16 through a liquid-tight seal. Similarly, although the outflow side pipe 22 is integrally molded with the lower tank portion 18 made of resin, it may be replaced by one that is molded separately from the lower tank portion 18. The materials of the inflow side pipe 20 and the outflow side pipe 22 are the same as those of the upper tank portion 16 and the lower tank portion 18. In some cases, materials different from the upper tank 16 and the lower tank 18 may be used.

  Since the inflow side pipe 20 and the outflow side pipe 22 are arranged at different positions in relation to the vehicle front structure, the outer shape etc. is slightly different, but since the basic structure is the same, in the following, the inflow side The pipe 20 will be described. Hereinafter, the inflow pipe 20 is referred to as a pipe 20 unless otherwise specified.

  FIG. 2 is a perspective view of the pipe structure 30 of the vehicle radiator for the pipe 20. As shown in FIG. Hereinafter, unless otherwise specified, the pipe structure 30 of the vehicle radiator is referred to as a pipe structure 30. In FIG. 2, although not a component of the pipe structure 30, a hose 32 attached to the pipe 20 and a clip 34 for fastening the hose 32 to the pipe 20 are indicated by a two-dot chain line. In FIG. 2, the line C-C is an axial center line of the pipe 20, and the direction in which the line C-C extends is a direction parallel to the longitudinal direction of the vehicle.

  The hose 32 is a conduit member for flowing the refrigerant, and is a flexible tube formed into a tubular shape using an elastic material in order to increase the degree of freedom of arrangement in the vehicle front structure. As a refrigerant, LLC (Long Life Coolant) is used. As an elastic material of the hose 32, a synthetic rubber having water resistance, heat resistance, and LLC resistance is used. For example, ethylene propylene diene (EPDM) rubber is used.

  The clip 34 is a ring-shaped plate spring clip which is formed by forming a thin metal plate into an open ring, and fixing the both ends of the open ring with a bolt and a nut. The inner peripheral surface of the hose 32 is fitted to the outer peripheral surface of the pipe 20, the open annular clip 34 is disposed on the outer peripheral surface of the hose 32, and both ends of the open annular are tightened and fastened with bolts and nuts. By tightening and fastening, the hose 32 can be fixed to the pipe 20 by the elasticity of the hose 32 and the elasticity of the annular shape of the clip 34.

  The pipe structure 30 is composed of a pipe 20 and a composite rib portion 40 provided on the outer peripheral surface of the pipe 20. The composite rib portion 40 includes a first rib portion 42, a second rib portion 44, and a third rib portion 46. The first rib portion 42 and the second rib portion 44 are both projecting ribs extending in the circumferential direction of the outer peripheral surface of the pipe 20. The third rib portion 46 is a protruding rib that is integrated with the first rib portion 42 and the second rib portion 44 and extends in the axial direction of the outer peripheral surface of the pipe 20.

  The first rib portion 42 and the second rib portion 44 extend along the circumferential direction, not over the entire circumference but over a half circumference. The whole circumference means extending over 360 degrees of a full angle in a perspective angle from the line C-C which is the axial center line of the pipe 20, and a half cycle is a perspective angle from the line C-C It means extending over a half circumference of 180 degrees. By setting the half circumference, the resin material of the pipe structure 30 can be reduced. The first rib portion 42 and the second rib portion 44 extend circumferentially in parallel with each other at a predetermined distance along the axial direction of the pipe 20.

  The disposition position of the third rib portion 46 in the circumferential direction is an intermediate position extending in the circumferential direction of the first rib portion 42 and the second rib portion 44 in the circumferential direction. The third rib 46 extends in the axial direction of the pipe 20 and marks the circumferential position of the pipe 20, and thus marks the fastening position of the clip 34 by the bolt and the nut. The fastening position of the clip 34 is preferably on the upper side of the pipe 20 from the viewpoint of workability. In FIG. 2, the arrangement position of the third rib portion 46 is the uppermost position in the circumferential direction of the pipe 20. Therefore, the range of the half circumference along the circumferential direction of the first rib portion 42 and the second rib portion 44 is a half circumference extending on both sides in the circumferential direction with the third rib portion 46 as an intermediate position. In other words, the first rib portion 42 and the second rib portion 44 extend along the circumferential direction of the pipe 20 over the upper half.

  Rib width dimension along the axial direction of the first rib portion 42 and the second rib portion 44, rib width dimension along the circumferential direction of the third rib portion 46, pipe 20 in the first rib portion 42 and the second rib portion 44 The predetermined spacing along the axial direction of the pipe 20 is determined based on the strength specification of the pipe 20. Similarly, a rib height dimension which is an amount of protrusion of the first rib portion 42, the second rib portion 44, and the third rib portion 46 from the outer peripheral surface of the pipe 20 is determined based on the strength specification of the pipe 20.

  In the composite rib portion 40, the first rib portion 42 and the second rib portion 44 along the circumferential direction and the third rib portion 46 along the axial direction are mutually formed on the outer peripheral surface of the pipe 20 protruding from the upper tank portion 16. Because they are connected and integrated, the bending rigidity of the pipe 20 is improved. By this, even if a stress is applied to the pipe 20 by moving the hose 32 disposed by being drawn around in the front structure of the vehicle due to the vibration of the vehicle or the like, the damage or the like of the pipe 20 can be suppressed with sufficient rigidity. .

  FIG. 3 is a cross-sectional view taken along the vertical direction of the vehicle, including the line C-C of FIG. An enlarged diameter portion 28 is provided slightly in the forward direction from the open end on the rear side of the pipe 20. By providing the enlarged diameter portion 28, when the hose 32 is fitted into the pipe 20, it is possible to prevent the hose 32 from falling backward along the axial direction of the pipe 20.

  As shown in FIG. 3, the hose 32 is fitted into the pipe 20 until it abuts on the rear end surface P of the composite rib portion 40. In other words, the end face P on the rear side of the composite rib portion 40 acts as an abutment surface of the hose 32.

  FIG. 4 is a trihedral view of the composite rib portion 40 in the pipe structure 30. Fig.4 (a) is a side view, (b) is a top view, (c) is a front view. In FIGS. 4A and 4C, the range in which the first rib portion 42 and the second rib portion 44 extend along the outer peripheral surface of the pipe 20 is from the line C-C that is the axial center line of the pipe 20. It is shown that it is a half turn of 180 degrees in anticipation angle. As described in FIG. 3, the rear end face P of the composite rib portion 40 acts as a butt surface of the hose 32, but the butt surface is in an angle range of 180 degrees. The stopper 48 shown in FIGS. 4B and 4C is provided on the outer peripheral surface of the pipe 20 at a position corresponding to the lower side of the end surface P. The stopper 48 acts as a lower abutment surface of the hose 32, so that the fitting state of the hose 32 into the pipe 20 is stabilized. Although the stopper 48 is provided at one place in the example of FIG. 4C, the stopper 48 may be provided at a plurality of places within the range where the end face P of the composite rib portion 40 does not extend.

  According to the pipe structure 30 of the above-described vehicle radiator, in addition to the first rib portion 42 and the second rib portion 44 extending in the circumferential direction of the outer peripheral surface of the pipe 20, the first rib portion 42 and the second rib portion 44 And a third rib 46 extending in the axial direction of the outer peripheral surface of the pipe 20. Thereby, the rigidity of the pipe 20 having a shape protruding from the upper tank portion 16 is improved. Further, since the third rib 46 extending in the axial direction can be used as a mark of the clip fixing position when the hose 32 is inserted into the pipe 20 and fixed by the clip 34, the fixing of the hose 32 to the pipe 20 is stabilized. .

  DESCRIPTION OF SYMBOLS 10 (For vehicle) Radiator, 12 core parts, 14 and 15 side plates, 16 upper tank part, 18 lower tank part, 20 (inflow side) pipe, 22 outflow side pipe, 24 tube, 26 fins, 28 enlarged diameter part, 30 pipe structure (of a vehicle radiator), 32 hoses, 34 clips, 40 composite rib portions, 42 first rib portions, 44 second rib portions, 46 third rib portions, 48 stoppers.

Claims (1)

A pipe for attaching a hose that protrudes from the tank portion of the vehicle radiator,
A first rib portion extending in the circumferential direction of the outer peripheral surface of the pipe;
A second rib portion, which extends in the circumferential direction of the outer peripheral surface of the pipe at a predetermined interval which is predetermined in the axial direction and the first rib portion;
A third rib portion integrally formed with the first rib portion and the second rib portion and extending in the axial direction of the outer peripheral surface of the pipe;
Pipe structure of a vehicle radiator having

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