JP4634341B2 - Engine radiator support structure - Google Patents

Description

The present invention relates to a support structure for an engine radiator attached to an engine .

Conventionally, a radiator made of copper is generally used as a radiator attached to an engine. Recently, automobile manufacturers and the like are switching to a lightweight aluminum radiator in consideration of environmental problems. For example, Patent Document 1 discloses a technique related to an aluminum radiator mounting structure.
JP-A-8-14289

  However, when replacing a copper radiator with an aluminum radiator, the aluminum radiator is less rigid than the copper radiator, and the tank provided on the aluminum radiator is made of resin and has no frame. If it is attached to the engine in this state, vibrations of the engine may be transmitted and cracks may occur in the core portion. As a result, the occurrence of cracks causes problems such as water leakage. In view of the above circumstances, the present invention provides a support structure for a radiator that can ensure rigidity and prevent engine vibration from being transmitted to the radiator.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In Claim 1, in the radiator (40) attached to the engine (1), the left and right and upper and lower peripheries of the radiator (40) are surrounded by a support frame (50), and the support frame (50) is formed in a frame shape. The upper and lower portions of the radiator (40) are supported by the support frame (50) via the vibration isolating member (51), and the support frame (50) is connected to the upper frame (50a) and the lower frame (50b). The lower frame (50b) is configured to be divided into upper and lower rails (50d, 50d), and the lower portion of the support frame (50) is disposed in the left and right radial brackets (approximately the same width). 55) The radiator bracket (55) is formed in an inverted L shape in cross-section, and has a plate shape having a plurality of bolt holes (55b) on the left and right sides thereof. The projecting portion (55a) is integrally fixed in the front-rear direction, and the end portions of the left and right engine brackets (30, 30) are attached to the left and right plate-like projecting portions (55a), and the engine bracket (30, 30) The other end of the engine bracket (1) is fixed to the engine (1), and the engine bracket (30) has a plate formed in a substantially L shape in side view, and the engine bracket (30) in the front and rear direction of the substantially L shape in side view. A bolt hole (30b) for attachment to the plate-like protrusion (55a) of the radiator bracket (55) is formed at the front end, and the upper end in the vertical direction of the substantially L-shaped engine bracket (30) in side view. A bolt hole (30c) for attachment to the engine (1) is formed in the part .

  As effects of the present invention, the following effects can be obtained.

In Claim 1, in the radiator (40) attached to the engine (1), the left and right and upper and lower peripheries of the radiator (40) are surrounded by a support frame (50), and the support frame (50) is formed in a frame shape. The upper and lower portions of the radiator (40) are supported by the support frame (50) via the vibration isolating member (51), and the support frame (50) is connected to the upper frame (50a) and the lower frame (50b). The lower frame (50b) is configured to be divided into upper and lower rails (50d, 50d), and the lower portion of the support frame (50) is disposed in the left and right radial brackets (approximately the same width). 55) The radiator bracket (55) is formed in an inverted L shape in cross-section, and has a plate shape having a plurality of bolt holes (55b) on the left and right sides thereof. The projecting portion (55a) is integrally fixed in the front-rear direction, and the end portions of the left and right engine brackets (30, 30) are attached to the left and right plate-like projecting portions (55a), and the engine bracket (30, 30) Since the other end portion of the radiator is fixed to the engine (1), the radiator support member can be made compact to reduce the manufacturing cost and the transportation cost.
Also, the radiator can be pulled out and removed, facilitating maintenance.

Further, in particular, the engine bracket (30) is formed so that the plate is substantially L-shaped in a side view, and the radiator bracket (55) is disposed at a front end portion of the engine bracket (30) in a front-rear direction of the L-shaped engine bracket (30). A bolt hole (30b) for attachment to the plate-like projecting portion (55a) is drilled, and the engine bracket (30) is attached to the upper end of the engine bracket (30) in the up-down direction in a substantially L shape in side view. Since the mounting bolt hole (30c) is drilled, the rigidity of the radiator support structure can be increased, and even an aluminum radiator having a lower rigidity than copper can be attached to the engine. Further, vibration from the engine can be buffered by a vibration isolating member.

Further , the radiator support member can be made compact to reduce the manufacturing cost and the transportation cost. Further, the frame can be configured symmetrically, and the design becomes easy.

Moreover, the assembly property of the engine and the radiator can be improved. In addition, the support stay for supporting the engine is disposed on the front side of the conventional one, and the vibration of the radiator can be reduced.

In addition, the number of parts can be reduced in the support structure of the engine radiator .

  Next, embodiments of the invention will be described.

  FIG. 1 is a right side view of an engine according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a front view. FIG. 4 is a rear view showing the support structure of the radiator according to the present invention.

  5 is a left side view, FIG. 6 is a front view, FIG. 7 is a perspective view showing a support frame according to the present invention, FIG. 8 is a plan view of the vibration isolation member, and FIG. 9 is a side sectional view of the vibration isolation member. is there.

  10 is a perspective view showing a rail portion of the lower frame, FIG. 11 is a side view showing a bracket according to the present invention, FIG. 12 is a plan view, FIG. 13 is a front view, and FIG. 14 is an attachment of the bracket according to the present invention. FIG. 15 is a rear view showing the support structure of the radiator.

  FIG. 16 is a perspective view showing a mounting position of a conventional mounting foot. In the following description, it is assumed that the direction of the arrow A shown in FIG. 1 is “front” and the opposite side is “rear”.

  First, an overall configuration of a diesel engine (hereinafter referred to as “engine”) mounted on a work machine or the like as an example of an engine to which the present invention is applied will be described with reference to FIGS. 1 to 3. A cylinder head 3 is attached to the upper part of the cylinder block 2 of the engine 1, and the upper surface of the cylinder head 3 is covered with a bonnet 4. An oil pan 5 as a lubricating oil tank is attached to the lower part of the cylinder block 2 via a spacer 31, and engine oil (lubricating oil) is stored in the oil pan 5. This lubricating oil is sucked by a lubricating oil pump (not shown) and supplied to each lubricating portion in the engine 1 via the lubricating oil filter 20.

  On one side of the cylinder block 2, a fuel injection pump 8 for sending fuel to be injected into a combustion chamber formed in the cylinder block 2 is attached. A fuel feed pump 10 that supplies fuel into the engine 1 is provided below the fuel injection pump 8. The fuel in the fuel tank (not shown) is sucked and sent out by the fuel feed pump 10 and introduced into the fuel injection pump 8 through the fuel filter 19 provided in the fuel supply path of the engine 1.

  A crankshaft 6 is rotatably supported in the lower part of the cylinder block 2 and is connected to a piston (not shown) via a connecting rod (not shown). A gear case 11 that houses gears for transmitting the power of the crankshaft 6 to the fuel injection pump 8 and the like is attached to the front surface of the cylinder block 2 and is covered with a gear case cover 12. . A cooling fan 13 is disposed on the front side of the gear case 11, and a radiator 40 is disposed in front of the cooling fan 13 via a bracket 30 described later. Further, a tubular fan shroud 41 is extended rearward from the radiator 40 and the outer periphery of the cooling fan 13 is covered by the fan shroud 41, and the rear part of the fan shroud 41 is fixed to the front part of the engine 1. ing. The cooling fan 13 is transmitted from a V pulley 14 provided on the crankshaft 6 to a pulley on the fan shaft 7 via a V belt 15 and driven. The power of the crankshaft 6 is also transmitted to the alternator 16 provided on the front side of the cylinder block 2 through the V pulley 14 and the V belt 15. A flywheel housing 18 that covers a flywheel (not shown) attached to the rear end of the crankshaft 6 is fixed to the rear surface of the cylinder block 2.

  Next, a radiator support structure according to the present invention will be described with reference to FIGS.

  The radiator support structure includes a radiator 40 main body, which is a supported body, and a support frame 50 that surrounds the radiator 40.

  The radiator 40 is for cooling the cooling water sent to the water jacket of the engine 1. As shown in FIG. 4, the radiator 40 has a cooling water inlet 40a at the upper part and a cooling water return port 40b at the lower part. Provided. Cooling water sent from the engine 1 by a cooling water pump (not shown) is stored in the upper tank above the radiator 40 from the cooling water inlet 40a, and is arranged in a plurality of vertical directions from the upper tank. It is sent to the lower tank through the core. The core is provided with heat radiating fins (not shown) to enhance heat dissipation, and the cooling air from the cooling fan 13 provided at the rear of the radiator 40 is applied to the heat radiating fins to forcibly cool the cooling water. Is returned to the water jacket of the engine 1 from the cooling water return port 40b after passing through the heat radiation.

  A radiator cap 40 c is provided on the upper surface of the radiator 40, and a cooling water outlet 40 d is provided in the lower part of the radiator 40. Further, the upper and lower surfaces (upper surface of the upper tank and lower surface of the lower tank) of the radiator 40 are provided with pin-shaped protrusions 42 and 42 and protrusions 43 and 43 (see FIG. 7), which will be described later. A cylindrical vibration-proof member 51 is externally fitted and covered. The radiator cap 40c adjusts the pressure change caused by the temperature change in the radiator 40 and keeps it substantially constant. After the cooling water is extracted, the radiator cap 40c is removed to replenish the cooling water. One end of a pipe (not shown) is connected to the cooling water outlet 40d. The tube is composed of a flexible hose (such as a rubber hose), and the other end of the tube is closed by a stopper.

  As shown in FIG. 7, the support frame 50 includes an upper frame 50a, a lower frame 50b, a vibration isolation member 51, and the like.

The upper frame 50a is bent in a substantially reverse “凵” shape when viewed from the front, and has bolt holes 50c formed in the left and right ends thereof in the left and right direction. 51a (FIG. 9) and the fixed hole 52 and the opening part 54 for inserting the upper part of the radiator cap 40c are each provided. The lower frame 50b is assembled in a substantially “凵” shape when viewed from the front, and is connected to the rail portion 50d that forms a vertical frame that is “U” -shaped in cross section formed in the vertical direction on the left and right sides. The lower frame portion 50e is L-shaped in cross section, and a bolt hole 50g is formed in the upper portion of the rail portion 50d. By fixing the bolt holes 50g and the bolt holes 50c of the upper frame 50a together and fixing them with bolts, the support frame 50 can be formed into a rectangular frame to form a strong frame. The lower frame portion 50e is provided with two anti-vibration member attachment members 50f provided with fixed holes 53 through which the receiving portions 51a of the anti-vibration member 51 are inserted.

  Next, the vibration isolation member 51 will be described with reference to FIGS. The vibration isolating member 51 has a circular shape in a plan view and a substantially T shape in a sectional view. And the insertion hole 51b inserted in the said protrusion 42 * 42 and protrusion 43 * 43 has penetrated the axial center part. Then, an edge is formed on the outer periphery of the upper and lower centers, and one side thereof is used as a receiving part 51a, and a fixed hole 52 provided in the upper frame 50a and a fixed hole 53 provided in the vibration isolator mounting member 50f; The shape to be fitted. The vibration isolation member 51 is made of an elastic body such as rubber or vibration isolation resin, and is buffered and supported so that vibrations from the engine and the traveling device are not directly transmitted to the radiator 40. Furthermore, the rubber and resin vibration-proof members 51 have heat insulation properties, and the heat of the radiator 40 is hardly transmitted to the support frame 50. Thereby, the thermal expansion of the support frame 50 can be reduced, and the deformation of the support frame 50 and the attachment of the support stays and the like do not occur.

  In such a configuration, the vibration isolating member 51 is fitted to the protrusions 42 and 42 and the protrusions 43 and 43 on the upper and lower surfaces of the radiator 40, and the radiator 40 is inserted from above the lower frame 50b along the rail portion 50d. The upper frame 50a is attached from above, and the left and right and upper and lower peripheries of the radiator 40 are arranged in a frame shape, and the bolt holes 50c of the upper frame 50a and the bolt holes 50g of the lower frame 50b are aligned to fix the bolt Is done. Further, since the support frame 50 can be divided into the upper frame 50a and the lower frame 50b as described above, the radiator 40 can be extracted upward by removing the upper frame 50a, and maintenance is facilitated.

  In this embodiment, the shape of the lower frame 50b of the support frame 50 is an integrated frame having a substantially “凵” shape when viewed from the front. However, as shown in FIG. 10, the rail portion 50d of the lower frame 50b The rail portion 50d and the lower frame portion 50e may be fixed with bolts or the like so that the rail frame 50d and the lower frame portion 50e can be assembled when the support frame 50 is assembled.

  That is, since the support frame 50 is configured to be divided into right and left, the support member of the radiator 40 can be made compact to reduce the manufacturing cost and the transportation cost. Further, the frame can be configured symmetrically, and the design becomes easy.

In this embodiment, the upper portion and the lower portion of the radiator 40 are attached to the support frame 50 via the vibration isolating member 51. However, as shown in FIG. 12, only the lower portion of the radiator 60 is interposed via the vibration isolating member 51. Can be accommodated in a support frame , and the support frame can be directly attached to the bracket without using the above-described cylindrical vibration isolating member 56.

  As described above, in the radiator 40 attached to the airframe or the engine 1, the left and right and upper and lower peripheries of the radiator 40 are surrounded by the support frame 50, and the support frame 50 is formed in a frame shape. Is supported on the support frame 50 via the vibration isolation member 51, the rigidity of the support structure of the radiator 40 can be increased, and even an aluminum radiator having a lower rigidity than copper can be attached to the engine 1. Become. Further, vibration from the engine 1 can be buffered by a vibration isolating member.

  In addition, since the support frame 50 is configured to be split vertically, the support member of the radiator 40 can be made compact to reduce manufacturing cost and transportation cost. In addition, the radiator 40 can be pulled upward and removed, facilitating maintenance.

  And the lower part of the said support frame 50 is attached on the bracket 55 of the width substantially the same as a support frame in the left-right direction via the cylindrical vibration-proof member 56 * 56, as shown in FIG. The bracket 55 is formed in an inverted L shape when viewed in cross section, and plate-like protrusions 55a having a plurality of bolt holes 55b are integrally fixed in the front-rear direction on the left and right sides of the bracket 55. The left and right plate-like protrusions 55a are attached to the bracket 55 in accordance with the width of the vehicle body frame, the mounting position of the bracket 30 to be described later to the engine, and the like.

  As shown in FIGS. 11 to 14, the bracket 30 has a plate formed in a substantially L shape in a side view, a bolt hole 30b at the front end portion, and a bolt hole 30c at the rear end portion (in this embodiment, the front end portion). In addition, four rear end portions are provided. In addition, a mounting foot (engine leg) 30a that serves as a support stay is provided in a projecting manner in the middle of the bracket 30 in the front-rear direction. The mounting foot 30a is formed in a substantially “凵” shape in a side view. The front part of the pair of left and right brackets 30 and 30 is fixed to the bracket 55 attached to the lower part of the support frame 50, the rear part is fixed to the left and right side parts of the engine 1, and the middle part is a vehicle body such as a vehicle. Secure on the frame. That is, the rear end portion of the bracket 30 is fixed to the left and right front lower side surfaces of the engine using the rear bolt hole 30c of the bracket 30, and the front end portion of the bracket 30 is connected to the lower portion of the support frame 50 using the front bolt hole 30b. Bolts are fixed to the plate-like protrusion 55a. Then, the engine 1 is fixedly supported at a predetermined position of the airframe by interposing a cylindrical vibration isolating member 57 below the mounting foot 30a. In the conventional mounting foot 70, as shown in FIG. 16, the mounting foot 70 and the bracket 71 are formed as separate members, and the mounting foot 70 and the rear portion of the bracket 71 are fastened together with bolts on a cylinder block or the like on the side surface of the engine. Since it was fixed, the assemblability was bad. However, by integrally forming the mounting foot and the bracket as in the present invention, the assemblability is improved and the number of parts can be reduced. Further, as shown in FIG. 11, the mounting foot 30 a is configured to be positioned in front of the installation location of the conventional mounting foot 70, that is, in the middle of the engine 1 and the radiator 40. Is able to suppress vibration transmitted to the radiator 40 after being attenuated by the mounting foot 30a. Conventionally, the radiator 40 is overhanged to support the radiator 40. However, since the engine 1 and the radiator 40 are supported on both the front and rear sides of the mounting foot 30a, the support rigidity can be increased. In this embodiment, the support frame 50 is attached to the engine via the bracket 30. However, the support frame 50 can be attached to the airframe portion via another support member or the like.

  As described above, one end portion of the bracket 30 is fixed to the lower portion of the support frame 50, the other end portion of the bracket 30 is fixed to the main body of the engine 1, and the support frame 50 is attached to the engine 1. Since the mounting foot 30a, which is a support stay for the engine 1, is provided in the middle portion, the assemblability can be improved. In addition, the support stay that supports the engine 1 is disposed on the front side of the conventional one, and the vibration of the radiator 40 can be reduced.

  Further, since the mounting foot 30a as the support stay is integrally formed with the bracket 30, the number of parts can be reduced.

The right view of the engine which concerns on this invention. FIG. Similarly front view. The rear view which shows the support structure of the radiator which concerns on this invention. Similarly left side view. Similarly front view. The perspective view which shows the support frame which concerns on this invention. The top view of a vibration isolator. Side surface sectional drawing of a vibration isolator. The perspective view which shows the rail part of a lower frame. The side view which shows the bracket which concerns on this invention. FIG. Similarly front view. The perspective view which shows the attachment position of the bracket which concerns on this invention. The rear view which shows the support structure of a radiator. The perspective view which shows the attachment position of the conventional mounting foot.

1 Engine 30 Bracket 30a Mounting foot 40 Radiator 50 Support frame 50a Upper frame 50b Lower frame 51 Anti-vibration member

Claims (1)

In the radiator (40) attached to the engine (1), the left and right sides and the upper and lower peripheries of the radiator (40) are surrounded by a support frame (50), the support frame (50) is formed in a frame shape, and the radiator (40) An upper part and a lower part of the frame are supported by a support frame (50) via a vibration isolating member (51), and the support frame (50) can be divided into upper and lower parts of the upper frame (50a) and the lower frame (50b). The left and right sides of the lower frame (50b) are configured as rail portions (50d and 50d), and the lower portion of the support frame (50) is mounted on a radiator bracket (55) having substantially the same width arranged in the left-right direction. The radiator bracket (55) is formed in an inverted L shape when viewed in cross section, and a plate-like protrusion (55a) having a plurality of bolt holes (55b) is provided on the left and right sides of the lower part. The ends of the left and right engine brackets (30, 30) are attached to the left and right plate-like protrusions (55a), and the other end of the engine bracket (30, 30) is connected to the engine ( 1), the engine bracket (30) has a plate formed in a substantially L shape in a side view, and the radiator bracket is attached to a front end portion of the engine bracket (30) in a front and rear direction in a substantially L shape in a side view. Bolt holes (30b) for attachment to the plate-like projections (55a) of (55) are drilled, and the engine (1 The structure for supporting the engine radiator is provided with a bolt hole (30c) for mounting to the engine radiator.