Radiator mounting structure

Abstract

To provide a radiator mounting structure that can provide improved workability related to work inside a frame.SOLUTION: A radiator mounting structure 100 includes a frame 30 and a radiator 40. The frame 30 includes a bottom plate 31 and a first end wall 32. The bottom plate 31 includes a first engagement portion 60 and a second engagement portion 70. The first engagement portion 60 includes a first cutout portion 64. The second engagement portion 70 includes a second cutout portion 74. The first cutout portion 64 is perpendicular to the first end wall 32 and is open in a direction from the first end wall 32 toward the radiator 40. The second cutout portion 74 is open in a different direction from the first cutout portion 64. The radiator mounting structure 100 allows the radiator 40 to rotate around a second connection portion 41b inserted into the second engagement portion 70 as a rotation center while maintaining the radiator attached to the frame 30.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a radiator mounting structure. [Background technology]

[0002] For example, in vehicles and generators, a radiator connected to a cooling medium path is used to cool heat-generating elements such as engines and batteries. The heat-generating elements are cooled by the cooling medium flowing through the cooling medium path. The cooling medium that has cooled the heat-generating elements is introduced into the radiator through the cooling medium path. The radiator cools the cooling medium by dissipating heat from the cooling medium to the outside air.

[0003] For example, Patent Document 1 discloses a radiator fixing structure as a radiator mounting structure, which includes a radiator, a radiator support that is part of a frame, and a fixing plug. The radiator is attached to the radiator support and fixed to the radiator support by the fixing plug. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-1951 A Summary of the Invention [Problem to be solved by the invention]

[0005] Generally, the radiator is provided in a position on the frame that allows heat exchange with the outside air. That is, the radiator is attached to the frame at a location that separates the inside from the outside. Therefore, to ensure workability, such as maintenance of the heating element inside the frame, the radiator must be removed from the frame.

[0006] However, removing the radiator from the frame requires removing the components that secure the radiator to the frame and the cooling medium passages that connect to the radiator, which reduces the ease of work inside the frame. Therefore, there is a need for a radiator mounting structure that can improve the ease of work inside the frame. [Means for solving the problem]

[0007] A radiator mounting structure for solving the above problems comprises a heat generating element, a cooling medium path through which a cooling medium flows to cool the heat generating element, and a radiator connected to the cooling medium path, the heat generating element being disposed above the bottom plate of a frame having a bottom plate and an end wall extending upright from the bottom plate, the end wall having a fixing surface to which the radiator is attached by a fixing member, the heat generating element being disposed on the side opposite to the fixing surface, a through hole penetrating the end wall in the wall thickness direction through which the cooling medium path passes, and a through hole extending from the underside of the radiator in the thickness direction of the radiator The radiator mounting structure has a first connection portion and a second connection portion that are aligned in a width direction perpendicular to both the forward and backward directions and that protrude toward the bottom plate, and the bottom plate has a first engagement portion into which the first connection portion is inserted and a second engagement portion into which the second connection portion is inserted, wherein the first engagement portion has a first notch portion that is perpendicular to the end wall and opens in a first direction that is a direction from the end wall toward the radiator, and the second engagement portion has a second notch portion that is parallel to an upper surface of the bottom plate and opens in a second direction that is a direction different from the first direction.

[0008] According to this, the radiator is attached to the fixing surface of the end wall by the fixing member, and its lower end is supported on the bottom plate by the first and second engagement portions. For example, when performing maintenance on a component on the side opposite the fixing surface of the end wall, after removing the fixing member, the radiator can be moved so that the first connection portion is separated from the first engagement portion while inserting the second connection portion into the second engagement portion. In other words, the radiator can be rotated around the second connection portion inserted into the second engagement portion as the rotation center. During this rotation, the first connection portion passes through the first notch and separates in the first direction, while the second connection portion remains inserted into the second engagement portion. As a result, maintenance on a component on the side opposite the fixing surface of the end wall can be performed through the through hole without removing the radiator from the bottom plate. As described above, the radiator mounting structure can improve the workability of work performed inside the frame.

[0009] In the above radiator mounting structure, the second direction may form an angle with the first direction that is greater than 0° and not greater than 90°. According to this, the second cutout portion opens in a direction intersecting the wall thickness direction, moving away from the end wall as it moves from the second engagement portion to the first engagement portion. The above configuration can simplify the work of attaching the radiator to each of the first engagement portion and the second engagement portion, for example, compared to a case where the second cutout portion opens closer to the end wall as it moves toward the first engagement portion. In other words, the radiator attachment structure can simplify the work of attaching the radiator to the frame.

[0010] In the above radiator mounting structure, the second direction may be perpendicular to the first direction and be a direction from the second engagement portion toward the first engagement portion. According to this, the opening direction of the first notch and the opening direction of the second notch are perpendicular to each other. Compared to when the second notch and the first notch are not perpendicular to each other, the second connection portion can be more easily maintained inserted into the second engagement portion when the radiator rotates around the second connection portion as the rotation center. As a result, by making the first direction and the second direction perpendicular to each other, the radiator mounting structure makes it less likely for the second connection portion to come off the second engagement portion when the radiator is rotated.

[0011] In the above-described radiator mounting structure, the first connection portion may penetrate a cylindrical first elastic member in the vertical direction, and the first engagement portion may define a first insertion hole into which the first elastic member is pressed; the second connection portion may penetrate a cylindrical second elastic member in the vertical direction, and the second engagement portion may define a second insertion hole into which the second elastic member is pressed; the diameter of the first insertion hole may be larger than the opening width of the first notch portion in a direction perpendicular to the vertical direction; the diameter of the second insertion hole may be larger than the opening width of the second notch portion in a direction perpendicular to the vertical direction; and the second insertion hole may be shaped to engage with the second elastic member.

[0012] According to this, the second engagement portion defines a second insertion hole that engages with the second elastic member. The second connection portion is inserted into the second engagement portion via the second elastic member. When the radiator rotates around the second connection portion as the rotation center, the second elastic member into which the second connection portion is inserted rotates in the circumferential direction of the second insertion hole. In other words, according to the above configuration, the rotation of the radiator is easier than when the second insertion hole and the second elastic member are not engaged. As a result, the radiator mounting structure can facilitate the rotation of the radiator when working inside the frame.

[0013] The first connecting portion is inserted into the first insertion hole via the first elastic member. The second connecting portion is inserted into the second insertion hole via the second elastic member. When the first connecting portion is inserted into the first insertion hole, the first engaging portion applies a force to the first elastic member in a radially inward direction of the first insertion hole. In this state, the first engaging portion applies a force to the first engaging portion in a direction opposite to the force applied by the first engaging member. As a result, friction is generated between the first elastic member and the first engaging portion, making it difficult for the first elastic member to come off the first insertion hole. In other words, the radiator is difficult to come off the first engaging portion. The same is true between the second elastic member and the second engaging portion. In other words, the radiator mounting structure, in which the first connecting portion penetrates the first elastic member and the second connecting portion penetrates the second elastic member, can more reliably mount the radiator to the frame compared to a structure not including the first elastic member and the second elastic member.

[0014] In the above-described radiator mounting structure, the cooling medium path has an outward path through which the cooling medium flows into the radiator and a return path through which the cooling medium flows out of the radiator, and the radiator has, in the thickness direction, a first surface facing the end wall and a second surface opposite the first surface, and the first surface is provided with an inlet through which the cooling medium flows in from the outward path and an outlet through which the cooling medium flows out toward the return path, and the inlet and the outlet may be provided closer to the second connection portion than the first connection portion in the width direction.

[0015] According to this, the outgoing and returning paths of the cooling medium path move together with the radiator when the radiator rotates. Because each of the outgoing and returning paths is attached to the first surface closer to the second connection portion in the width direction, the distance the radiator moves when the radiator rotates is smaller than when the outgoing and returning paths are attached to the first surface closer to the first connection portion. As a result, even when the outgoing and returning paths are connected to the radiator's inlet and outlet, respectively, the radiator can be rotated without applying a large load to the outgoing and returning paths. In other words, the radiator mounting structure can reduce the load applied to the outgoing and returning paths when the radiator rotates, compared to when the inlet and outlet are located closer to the first connection portion on the first surface.

[0016] In the above radiator mounting structure, the first engaging portion and the second engaging portion may be separate from the bottom plate. According to this, the first and second engagement portions are formed separately from the bottom plate. That is, the positions of the first and second engagement portions on the bottom plate can be easily changed compared to when the first and second engagement portions are integral with the bottom plate. As a result, when the size of the radiator in the width direction is changed, for example, the positions of the first and second engagement portions of the radiator mounting structure can be easily changed in accordance with the change.

[0017] In the above radiator mounting structure, the first engagement portion may support the radiator so that the first connection portion and the bottom plate are spaced apart in the vertical direction, and the second engagement portion may support the radiator so that the second connection portion and the bottom plate are spaced apart in the vertical direction.

[0018] According to this, the first and second connection parts do not come into contact with the bottom plate when the radiator rotates. In other words, the radiator mounting structure allows the radiator to rotate more easily than when the first and second connection parts come into contact with the bottom plate.

[0019] In the above radiator mounting structure, the heat generating element may be a fuel cell stack. Fuel cells may require more frequent maintenance than heat-generating elements such as internal combustion engines. Furthermore, the frame on which the fuel cell is mounted is equipped with pipes through which hydrogen, used to generate electricity in the fuel cell, flows, and it is desirable to ensure ease of access, such as by accessing the pipes through a wide opening. The radiator mounting structure improves ease of access while enabling access through the through-holes in the end walls, ensuring the ease of access desired for the frame on which the fuel cell is mounted.

[0020] The above-described radiator mounting structure may be mounted on an industrial vehicle having a loading device and a vehicle body, the vehicle body housing the frame and the radiator.

[0021] Industrial vehicles require more frequent maintenance than non-industrial vehicles, such as passenger cars. The radiator mounting structure installed in industrial vehicles improves workability in industrial vehicles because it does not require the radiator to be removed each time work is performed. As a result, the radiator mounting structure reduces the time required for each work session, allowing for more frequent maintenance of industrial vehicles. [Effects of the Invention]

[0022] According to the present invention, it is possible to improve the workability related to work inside the frame. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a side view showing a fuel cell forklift. [Figure 2] FIG. 2 is a configuration diagram of the fuel cell unit. [Figure 3] FIG. 3 is a perspective view showing a fuel cell unit. [Figure 4] FIG. 4 is an exploded perspective view showing the radiator mounting structure. [Figure 5] FIG. 5 is a perspective view showing the radiator mounting structure. [Figure 6]FIG. 6 is a rear view showing the radiator mounting structure. [Figure 7] FIG. 7 is a top view showing the operation of the radiator in the radiator mounting structure. [Figure 8] FIG. 8 is a perspective view of a radiator mounting structure according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0024] An embodiment of a radiator mounting structure will now be described with reference to Figures 1 to 7. The radiator mounting structure of this embodiment is mounted on a fuel cell forklift. <Industrial vehicles> As shown in FIG. 1, a fuel cell forklift 10 as an industrial vehicle includes a vehicle body 11, a cargo handling device 12, drive wheels 13, and a fuel cell unit 20. The fuel cell forklift 10 also includes a radiator mounting structure 100. In the following description, the terms "front," "rear," "left," "right," "up," and "down" refer to the state in which the operator operating the fuel cell forklift 10 is facing forward. The fore-and-aft direction X can also be considered the traveling direction of the fuel cell forklift 10. The left-and-right direction Y can also be considered the width direction of the fuel cell forklift 10. The up-and-down direction Z can also be considered the height direction of the fuel cell forklift 10.

[0025] A driver's seat 14 is provided on the upper surface of the vehicle body 11. The vehicle body 11 has a counterweight 15. The counterweight 15 is located rearward of the driver's seat 14. The counterweight 15 is provided with a discharge passage 15a. The discharge passage 15a extends in the front-rear direction X. The discharge passage 15a opens at the rear surface of the vehicle body 11.

[0026] A fuel cell unit 20 is housed inside the vehicle body 11. The space housing the fuel cell unit 20 communicates with the exhaust passage 15a. The fuel cell unit 20 is located below the driver's seat .

[0027] The cargo handling device 12 is driven by electric power generated by the fuel cell unit 20. The electric power generated by the fuel cell unit 20 is supplied to a cargo handling motor (not shown). The cargo handling motor uses the supplied electric power to drive the cargo handling device 12. The fuel cell forklift 10 performs cargo handling work using the cargo handling device 12.

[0028] The drive wheels 13 are driven by electric power generated by the fuel cell unit 20. The electric power generated by the fuel cell unit 20 is supplied to a traction motor (not shown). The traction motor uses the supplied electric power to drive the drive wheels 13. The fuel cell forklift 10 travels by means of the drive wheels 13.

[0029] <Overall view of the radiator mounting structure> 2 and 3, the radiator mounting structure 100 includes a fuel cell stack 22 as a heat generating body, a cooling medium path 23, a frame 30, and a radiator 40. The radiator mounting structure 100 is provided in the fuel cell unit 20.

[0030] <Fuel cell unit> The fuel cell unit 20 has a housing 21, a fan 24, and a radiator mounting structure 100. That is, in this embodiment, the heat-generating element is the fuel cell stack 22. The housing 21 houses the fan 24 and the radiator mounting structure 100. That is, the housing 21 houses the frame 30, the fuel cell stack 22, the cooling medium path 23, the fan 24, and the radiator 40.

[0031] <frame> As shown in FIGS. 3 and 4, the frame 30 has a bottom plate 31, a first end wall 32 and a second end wall 33 as end walls.

[0032] The bottom plate 31 is made of a rectangular metal plate. The bottom plate 31 has a bottom plate upper surface 31a as an upper surface on one side in the plate thickness direction, and a bottom plate lower surface 31b on the other side in the plate thickness direction. In other words, the bottom plate upper surface 31a is the surface opposite the bottom plate lower surface 31b in the plate thickness direction of the bottom plate 31.

[0033] The first end wall 32 is plate-shaped and has a first end wall inner surface 32a in a first wall-thickness direction T1, which is the wall thickness direction, and a first end wall outer surface 32b serving as a fixing surface. The first end wall outer surface 32b is the surface opposite the first end wall inner surface 32a in the first wall-thickness direction T1. The first end wall 32 defines a through hole 32c. The through hole 32c penetrates the first end wall 32 in the first wall-thickness direction T1 and opens at both the first end wall inner surface 32a and the first end wall outer surface 32b.

[0034] A pair of wall-side fixing holes 32d are formed in the first end wall 32. Each of the pair of wall-side fixing holes 32d opens on the first end wall inner surface 32a and the first end wall outer surface 32b. In other words, each of the pair of wall-side fixing holes 32d penetrates the first end wall 32.

[0035] The second end wall 33 is plate-shaped and has a second end wall inner surface 33a and a second end wall outer surface 33b in the second wall thickness direction T2. ​​The second end wall outer surface 33b is the surface opposite the second end wall inner surface 33a in the second wall thickness direction T2.

[0036] The first end wall 32 and the second end wall 33 are each erected on the bottom plate upper surface 31a. The first end wall 32 is provided on one side of the bottom plate upper surface 31a in the longitudinal direction of the bottom plate 31, and the second end wall 33 is provided on the other side of the bottom plate 31 in the longitudinal direction. In other words, the first end wall 32 and the second end wall 33 are aligned in the longitudinal direction of the bottom plate 31.

[0037] The bottom plate upper surface 31a is divided into a first upper surface 311a and a second upper surface 312a by the first end wall 32. The second upper surface 312a is a surface of the bottom plate upper surface 31a that is located between the first end wall 32 and the second end wall 33 in the longitudinal direction of the bottom plate 31. In other words, the second upper surface 312a is a surface that is continuous with each of the first end wall inner surface 32a and the second end wall inner surface 33a. The first upper surface 311a is a surface of the bottom plate upper surface 31a that is different from the second upper surface 312a. In other words, the first upper surface 311a is a surface that is continuous with the first end wall outer surface 32b.

[0038] The bottom plate 31, the first end wall 32, and the second end wall 33 define a storage section 34. The inner surface of the storage section 34 is formed by the second upper surface 312a, the first end wall inner surface 32a, and the second end wall inner surface 33a. In other words, the storage section 34 is the portion of the frame 30 located between the first end wall 32 and the second end wall 33.

[0039] The bottom plate 31 and the first end wall 32 define a support portion 35. The support portion 35 is a portion of the frame 30 that is different from the storage portion 34. The support portion 35 has a first upper surface 311a as its bottom surface.

[0040] 3, the frame 30 is provided on the housing 21 at a position closer to the right in the left-right direction Y. The frame 30 can be connected to the outside via the exhaust passage 15a of the vehicle body 11.

[0041] The frame 30 is provided in the housing 21 such that the bottom plate upper surface 31a faces upward in the vertical direction Z and the bottom plate lower surface 31b faces downward. That is, in the frame 30, the first end wall 32 and the second end wall 33 each stand upright in the vertical direction Z from the bottom plate upper surface 31a. The frame 30 has a bottom plate 31 and a first end wall 32 standing upright from the bottom plate 31. The frame 30 is provided in the housing 21 such that the longitudinal direction of the bottom plate 31 coincides with the front-rear direction X and the first end wall 32 is located rearward of the second end wall 33 in the front-rear direction X. In other words, the first wall thickness direction T1 and the second wall thickness direction T2 each coincide with the front-rear direction X, and the second end wall 33 is located forward of the first end wall 32 in the front-rear direction X. In the front-rear direction X, each of the first end wall inner surface 32a and the second end wall outer surface 33b is a surface facing forward, and each of the first end wall outer surface 32b and the second end wall inner surface 33a is a surface facing rearward.

[0042] Although not shown, the accommodation portion 34 of the frame 30 is provided with the fuel cell stack 22, the cooling medium path 23, and the fan 24. A radiator 40 is also provided on the support portion 35 of the frame 30. That is, in the radiator mounting structure 100, the fuel cell stack 22, the cooling medium path 23, and the radiator 40 are disposed above the bottom plate 31 of the frame 30, which has a bottom plate 31 and a first end wall 32 extending upright from the bottom plate 31. The frame 30 is provided inside the housing 21 and mounts the fuel cell stack 22, the cooling medium path 23, the fan 24, and the radiator 40 to the housing 21. The frame 30 is used to integrate the fuel cell stack 22, the cooling medium path 23, the fan 24, and the radiator 40 into a single unit. The frame 30 is provided in the vehicle body 11 at a position accessible from the outside via the exhaust passage 15a.

[0043] <Fuel cell stack> As shown in FIG. 2, the fuel cell stack 22 is formed by stacking a plurality of battery cells (not shown). The fuel cell stack 22 is, for example, a polymer electrolyte fuel cell. The fuel cell stack 22 has an anode (not shown), a cathode (not shown), and an electrolyte membrane (not shown). The fuel cell stack 22 generates electricity by chemically reacting hydrogen as a fuel gas supplied to the anode with oxygen as an oxidant gas supplied to the cathode. The fuel cell stack 22 is connected to an air compressor 25. The air compressor 25 supplies air containing oxygen as an oxidant gas to the fuel cell stack 22.

[0044] The fuel cell stack 22 is fixed to the housing 21 by the frame 30. The fuel cell stack 22 is housed in a housing portion 34 of the frame 30. In other words, the fuel cell stack 22 is aligned with each of the first end wall 32 and the second end wall 33 in the front-rear direction X, and is provided forward of the first end wall 32 and rearward of the second end wall 33.

[0045] <Fan> As shown in FIGS. 2 and 4, the fan 24 rotates to blow air backward in the front-rear direction X. The fan 24 is fixed to the housing 21 by the frame 30. The fan 24 is housed in a housing portion 34 of the frame 30. The fan 24 is located opposite the first end wall 32 in the front-rear direction X and faces the first end wall inner surface 32a. In other words, the fan 24 is aligned with the through-hole 32c in the front-rear direction X and is located forward of the through-hole 32c. In other words, the fan 24 sends air from the housing portion 34 toward the support portion 35 through the through-hole 32c.

[0046] <Radiator> As shown in Figures 3 and 4, the radiator 40 has a thickness direction R1, a width direction R2, and a height direction R3. The thickness direction R1, width direction R2, and height direction R3 are perpendicular to one another. The radiator 40 has a first radiator surface 40a as a first surface and a second radiator surface 40b as a second surface in the thickness direction R1. The second radiator surface 40b is the surface opposite the first radiator surface 40a in the thickness direction R1. Each of the first radiator surface 40a and the second radiator surface 40b has a rectangular shape with each edge in the width direction R2 as the long side.

[0047] The radiator 40 has a radiator upper surface 40c and a radiator lower surface 40d as its lower surface in the height direction R3. The radiator lower surface 40d is the surface opposite the radiator upper surface 40c in the height direction R3. Each of the radiator upper surface 40c and the radiator lower surface 40d has a rectangular shape with each of the edges in the thickness direction R1 as its long sides.

[0048] The radiator 40 has a first connection portion 41a and a second connection portion 41b on the radiator lower surface 40d. Each of the first connection portion 41a and the second connection portion 41b is cylindrical with its axial direction in the height direction R3 and is formed on the radiator lower surface 40d. Each of the first connection portion 41a and the second connection portion 41b is protruding from the radiator lower surface 40d. In other words, each of the first connection portion 41a and the second connection portion 41b is protruding from the radiator lower surface 40d in directions perpendicular to each of the thickness direction R1 and the width direction R2 of the radiator 40. The first connection portion 41a and the second connection portion 41b are aligned in the width direction R2 on the radiator lower surface 40d and are at the same position in the thickness direction R1.

[0049] As shown in FIG. 6, a first elastic member 51 is attached to the first connecting portion 41a. The first elastic member 51 is made of synthetic resin. The first elastic member 51 is cylindrical with its axial direction in the height direction R3. The first connecting portion 41a penetrates the first elastic member 51. That is, the first connecting portion 41a penetrates the cylindrical first elastic member 51 in the height direction R3. The inner diameter of the first elastic member 51 is the same as the diameter of the first connecting portion 41a. A first recess 51a is formed on the outer peripheral surface of the first connecting portion 41a. In the first recess 51a, the outer diameter of the first elastic member 51 is smaller than the outer diameter of the portion other than the portion where the first recess 51a is formed.

[0050] A second elastic member 52 is attached to the second connecting portion 41b. The second elastic member 52 is made of synthetic resin. The second elastic member 52 is cylindrical with its axial direction in the height direction R3. The second connecting portion 41b penetrates the second elastic member 52. In other words, the second connecting portion 41b penetrates the cylindrical second elastic member 52 in the height direction R3. The inner diameter of the second elastic member 52 is the same as the diameter of the second connecting portion 41b. A second recess 52a is formed on the outer peripheral surface of the second connecting portion 41b. In the second recess 52a, the outer diameter of the second elastic member 52 is smaller than the outer diameter of the portion other than the portion where the second recess 52a is formed.

[0051] 4, an inlet 42a and an outlet 42b are provided on the first radiator surface 40a of the radiator 40. The inlet 42a and the outlet 42b each open in a direction from the second radiator surface 40b toward the first radiator surface 40a in the thickness direction R1 of the radiator 40. Coolant flows into the inlet 42a from the cooling medium path 23. The coolant flows out toward the cooling medium path 23 from the outlet 42b.

[0052] On the first radiator surface 40a, the inlet 42a is located closer to the radiator top surface 40c than the outlet 42b in the height direction R3. The inlet 42a and the outlet 42b are located at the same position on the first radiator surface 40a as the second connecting portion 41b in the width direction R2. That is, on the first radiator surface 40a, the second connecting portion 41b, the inlet 42a, and the outlet 42b are aligned in the height direction R3. In other words, the inlet 42a and the outlet 42b are located closer to the second connecting portion 41b than the first connecting portion 41a in the width direction R2 of the radiator 40.

[0053] The radiator 40 has a pair of fixing flanges 43. Each of the pair of fixing flanges 43 is formed on an end of the first radiator surface 40a on the radiator top surface 40c side. The pair of fixing flanges 43 are aligned in the width direction R2 of the radiator 40.

[0054] The radiator 40 is fixed to the housing 21 by the frame 30. The radiator 40 is provided on the support portion 35 of the frame 30. The radiator 40 is provided at a position where the first radiator surface 40a faces the first end wall outer surface 32b. That is, the radiator 40 is provided on the support portion 35 so that the thickness direction R1 and the front-rear direction X coincide with each other. In other words, the radiator 40 has a first radiator surface 40a facing the first end wall 32 in the front-rear direction X, and a second radiator surface 40b opposite the first radiator surface 40a. In addition, in the front-rear direction X, the first radiator surface 40a faces forward, and the second radiator surface 40b faces rearward. Therefore, the radiator 40 is provided on the support portion 35 so as to be aligned with the first end wall 32 in the front-rear direction X.

[0055] The radiator 40 is provided on the support portion 35 so that the inlet 42a and the outlet 42b face the through-hole 32c. The radiator 40 is provided on the support portion 35 so that the width direction R2 coincides with the left-right direction Y. In other words, the first connection portion 41a and the second connection portion 41b are aligned in the left-right direction Y on the radiator lower surface 40d. The radiator 40 is provided so that the first connection portion 41a is to the right of the second connection portion 41b in the left-right direction Y. In other words, the first connection portion 41a is positioned further outward from the housing 21 in the left-right direction Y than the second connection portion 41b.

[0056] The radiator 40 is provided so that the radiator lower surface 40d faces the first upper surface 311a. In other words, the radiator 40 is provided on the support portion 35 so that the height direction R3 and the up-down direction Z coincide with each other. That is, the radiator 40 is disposed above the bottom plate 31 of the frame 30. A first connecting portion 41a and a second connecting portion 41b are arranged side by side in a width direction R2 that is perpendicular to both the thickness direction R1 and the up-down direction Z of the radiator 40 and protrude from the radiator lower surface 40d toward the bottom plate 31.

[0057] In the fuel cell forklift 10, the radiator 40 is attached to the frame 30 so as to be accessible from the discharge passage 15a of the vehicle body 11. <Fixing plate, first fixing member, and second fixing member> The radiator mounting structure 100 has a fixing plate 80, a pair of first fixing members 81, and a pair of second fixing members 82 as fixing members. The fixing plate 80 is a metal plate with fixing plate holes 80a formed in the plate thickness direction. The fixing plate holes 80a penetrate the fixing plate 80 in the plate thickness direction. In other words, the fixing plate holes 80a open on each of the two surfaces of the fixing plate 80 in the plate thickness direction. A pair of first fixing holes 80b and a pair of second fixing holes 80c are formed in the fixing plate 80. The fixing plate 80 has two cooling medium path openings 80d on either side of the fixing plate hole 80a in a direction perpendicular to the plate thickness direction. Each cooling medium path opening 80d opens in the plate thickness direction of the fixing plate 80.

[0058] The fixing plate 80 is provided between the first end wall 32 and the radiator 40. The fixing plate 80 is provided on the support part 35 so that the direction in which the two cooling medium path openings 80d are aligned coincides with the up-down direction Z. The fixing plate holes 80a are aligned with the through holes 32c in the front-rear direction X.

[0059] Each of the pair of first fixing members 81 penetrates each of the pair of first fixing holes 80b and the fixing flange 43, thereby fixing the fixing plate 80 to the radiator 40. In other words, the fixing plate 80 is fixed to the first radiator surface 40a by the pair of first fixing members 81. Furthermore, each of the pair of second fixing members 82 penetrates each of the pair of second fixing holes 80c and each of the pair of wall-side fixing holes 32d, thereby fixing the fixing plate 80 to the first end wall 32. In other words, the fixing plate 80 is fixed to the first end wall outer surface 32b by the pair of second fixing members 82. The radiator 40 is fixed to the first end wall 32 via the fixing plate 80 by the pair of first fixing members 81 and the pair of second fixing members 82. That is, the radiator mounting structure 100 has a first end wall outer surface 32b to which the radiator 40 is attached by a fixing plate 80, a pair of first fixing members 81, and a pair of second fixing members .

[0060] The two cooling medium openings 80d face the inlet 42a and the outlet 42b, respectively. That is, the inlet 42a and the outlet 42b face the cooling medium openings 80d and the through-holes 32c, respectively, in the front-rear direction X.

[0061] The air sent by the fan 24 from the housing portion 34 to the support portion 35 passes through the through-holes 32c and the fixing plate holes 80a and reaches the radiator 40. In other words, the fan 24 contributes to cooling the radiator 40.

[0062] <Cooling medium path> 2, the cooling medium path 23 circulates cooling water as a cooling medium between the fuel cell stack 22 and the radiator 40. The cooling medium may be, for example, cooling air. The cooling water that cools the fuel cell stack 22 flows through the cooling medium path 23.

[0063] The cooling medium path 23 has an outgoing path 23a, a returning path 23b, and a pump 26. The pump 26 circulates the cooling water in the cooling medium path 23. The outgoing path 23a is a flow path for flowing cooling water from the fuel cell stack 22 toward the radiator 40. The returning path 23b is a flow path for flowing cooling water from the radiator 40 toward the fuel cell stack 22. The outgoing path 23a flows the cooling water that has cooled the fuel cell stack 22 to the radiator 40 via the through-hole 32c and the cooling medium path opening 80d on the upper side of the fixing plate 80. In other words, the cooling medium that flows into the radiator 40 flows through the outgoing path 23a. The returning path 23b flows the cooling water that has been cooled by the radiator 40 to the fuel cell stack 22 via the cooling medium path opening 80d on the lower side of the fixing plate 80 and the through-hole 32c. In other words, the cooling medium that flows out of the radiator 40 flows through the returning path 23b. That is, each of the outgoing path 23a and the returning path 23b connects the fuel cell stack 22 and the radiator 40 via the first end wall 32 and the fixing plate 80. The cooling medium path 23 passes through the through-hole 32c of the first end wall 32 in the first wall thickness direction T1. That is, the fuel cell stack 22 is disposed on the side of the frame 30 opposite the first end wall outer surface 32b to which the radiator 40 is attached.

[0064] The cooling medium path 23 is defined by pipes 23c. The pipes 23c defining the outward path 23a are connected to the inlet 42a. The pipes 23c defining the return path 23b are connected to the outlet 42b. In other words, the radiator 40 is connected to the cooling medium path 23.

[0065] The cooling medium path 23 is fixed to the housing 21 by a frame 30. The cooling medium path 23 is disposed above the bottom plate 31 of the frame 30. <First engagement portion> As shown in FIGS. 4 and 5, the frame 30 has a first engagement portion 60 and a second engagement portion 70.

[0066] The first engagement portion 60 is gutter-shaped and has a first engagement upper portion 61 and a pair of first engagement side portions 62. The first engagement upper portion 61 is a long plate-like portion having a longitudinal direction. Each of the pair of first engagement side portions 62 is a plate-like portion having a plate thickness direction perpendicular to the longitudinal direction of the first engagement upper portion 61. Each of the pair of first engagement side portions 62 extends from an edge of the first engagement upper portion 61 that extends in a direction perpendicular to the longitudinal direction and the plate thickness direction. The pair of first engagement side portions 62 extend from the edge in the same direction. In other words, each of the pair of first engagement side portions 62 extends from the first engagement upper portion 61 and faces each other in the longitudinal direction of the first engagement upper portion 61. Each of the pair of first engagement side portions 62 is formed integrally with the first engagement upper portion 61. In other words, the first engagement portion 60 is formed by molding a single plate-like member.

[0067] A first insertion hole 63 is formed in the first engagement portion 60. The first insertion hole 63 penetrates the first engagement upper portion 61 in the plate thickness direction of the first engagement upper portion 61. In other words, the first insertion hole 63 is defined in the first engagement upper portion 61, and opens at each end face in the plate thickness direction of the first engagement upper portion 61. The hole diameter of the first insertion hole 63 is larger than the outer diameter of the outer peripheral surface of the first elastic member 51 at the first recess 51a, and is smaller than the outer diameter of the outer peripheral surface of the first elastic member 51 other than the portion where the first recess 51a is formed.

[0068] The first engagement portion 60 has a first cutout portion 64. The first cutout portion 64 is formed in the first engagement upper portion 61. The first cutout portion 64 cuts out the first engagement upper portion 61 in a first direction D1 that is perpendicular to both the longitudinal direction and the thickness direction of the first engagement upper portion 61. The first cutout portion 64 cuts out the first engagement portion 60 in the first direction D1 and causes the first insertion hole 63 to open in the first direction D1. In other words, the first insertion hole 63 opens in the thickness direction of the first engagement upper portion 61 in the first engagement upper portion 61 and opens in the first direction D1 by the first cutout portion 64. The width of the first engagement upper portion 61 cut out in the longitudinal direction by the first cutout portion 64 is smaller than the diameter of the first insertion hole 63. That is, the diameter of the first insertion hole 63 is larger than the opening width of the first cutout portion 64 in the direction perpendicular to the vertical direction Z.

[0069] <Second engagement portion> The second engagement portion 70 is gutter-shaped and has a second engagement upper portion 71 and a pair of second engagement side portions 72. The second engagement upper portion 71 is in the form of a long plate having a longitudinal direction. Each of the pair of second engagement side portions 72 is in the form of a plate having a plate thickness direction perpendicular to the longitudinal direction of the second engagement upper portion 71. Each of the pair of second engagement side portions 72 extends from each of the edges of the second engagement upper portion 71 extending in a direction perpendicular to the longitudinal direction and the plate thickness direction. The pair of second engagement side portions 72 extend from the edges in the same direction. In other words, each of the pair of second engagement side portions 72 extends from the second engagement upper portion 71 and faces each other in the longitudinal direction of the second engagement upper portion 71. Each of the pair of second engagement side portions 72 is formed integrally with the second engagement upper portion 71. In other words, the second engagement portion 70 is formed by molding a single plate-shaped member.

[0070] A second insertion hole 73 is formed in the second engagement portion 70. The second insertion hole 73 penetrates the second engagement upper portion 71 in the plate thickness direction of the second engagement upper portion 71. In other words, the second insertion hole 73 is defined in the second engagement upper portion 71, and opens at each end face in the plate thickness direction of the second engagement upper portion 71. The hole diameter of the second insertion hole 73 is larger than the outer diameter of the outer peripheral surface of the second elastic member 52 at the second recess 52a, and smaller than the outer diameter of the outer peripheral surface of the second elastic member 52 other than the portion where the second recess 52a is formed.

[0071] The second engagement portion 70 has a second cutout portion 74. The second cutout portion 74 is formed in the second engagement upper portion 71. The second cutout portion 74 cuts out the second engagement upper portion 71 in a second direction D2 that is perpendicular to both the longitudinal direction and the thickness direction of the second engagement upper portion 71. The second cutout portion 74 cuts out the second engagement portion 70 in the second direction D2 and opens the second insertion hole 73 in the second direction D2. In other words, the second insertion hole 73 opens in the thickness direction of the second engagement upper portion 71 in the second engagement upper portion 71 and is opened in the second direction D2 by the second cutout portion 74. The width of the second engagement upper portion 71 cut out in the longitudinal direction by the second cutout portion 74 is smaller than the diameter of the second insertion hole 73. That is, the diameter of the second insertion hole 73 is larger than the opening width of the second cutout portion 74 in the direction perpendicular to the vertical direction Z.

[0072] <Relationship between the first engagement portion, the second engagement portion, and the bottom plate> As shown in FIGS. 4, 5, and 6, the first engagement portion 60 and the second engagement portion 70 are each provided on the first upper surface 311a. The first engagement portion 60 and the second engagement portion 70 are each separate from the bottom plate 31. The first engagement portion 60 and the second engagement portion 70 are each fixed to the bottom plate 31. The first engagement portion 60 and the second engagement portion 70 are each provided on the bottom plate upper surface 31a. In other words, the bottom plate 31 has the first engagement portion 60 and the second engagement portion 70. The first engagement portion 60 and the second engagement portion 70 are each provided rearward of the first end wall 32 in the front-rear direction X.

[0073] The first engagement portion 60 is provided on the bottom plate 31 so that each of the pair of first engagement side portions 62 stands upright relative to the bottom plate upper surface 31a. In other words, each of the pair of first engagement side portions 62 is located between the first engagement upper portion 61 and the bottom plate 31 in the up-down direction Z. The first engagement portion 60 is provided on the bottom plate 31 so that the plate thickness direction of the first engagement upper portion 61 coincides with the up-down direction Z and the plate thickness direction of each of the pair of first engagement side portions 62 coincides with the left-right direction Y. Furthermore, the first engagement portion 60 is provided so that the first direction D1 coincides with the front-rear direction X and faces rearward. In other words, in the first engagement portion 60, the first cutout portion 64 opens in a direction from the first end wall 32 toward the first engagement portion 60. In other words, the first engagement portion 60 has a first notch portion 64 that is perpendicular to the first end wall 32 and opens in a first direction D1 that is a direction from the first end wall 32 toward the radiator 40.

[0074] The second engagement portion 70 is provided on the bottom plate 31 so that each of the pair of second engagement side portions 72 stands upright relative to the bottom plate upper surface 31a. In other words, each of the pair of second engagement side portions 72 is located between the second engagement upper portion 71 and the bottom plate 31 in the up-down direction Z. The second engagement portion 70 is provided on the bottom plate 31 so that the plate thickness direction of the second engagement upper portion 71 coincides with the up-down direction Z and the plate thickness direction of each of the pair of second engagement side portions 72 coincides with the front-rear direction X. Furthermore, the second engagement portion 70 is provided so that the second direction D2 coincides with the left-right direction Y and faces rightward. The second direction D2 is perpendicular to the first direction D1 and is a direction from the second engagement portion 70 to the first engagement portion 60. It can also be said that the angle between the second direction D2 and the first direction D1 is greater than 0° and less than 90°. In this embodiment, the second direction D2 forms an angle of 90° with the first direction D1. In other words, the second engagement portion 70 has a second cutout portion 74 that is parallel to the bottom plate upper surface 31a of the bottom plate 31 and opens in the second direction D2, which is a direction different from the first direction D1. The second engagement portion 70 is aligned with the first engagement portion 60 in the left-right direction Y and is provided at the same position in the front-rear direction X. The second engagement portion 70 is spaced apart from the first engagement portion 60 so that the distance between the center of the first insertion hole 63 and the center of the second insertion hole 73 matches the distance between the first connection portion 41a and the second connection portion 41b in the width direction R2 of the radiator 40.

[0075] <How to install the radiator> The first connection portion 41a of the radiator 40 is inserted into the first insertion hole 63 via the first elastic member 51. The second connection portion 41b of the radiator 40 is inserted into the second insertion hole 73 via the second elastic member 52. In other words, the radiator 40 is attached to the support portion 35 by inserting the first connection portion 41a and the second connection portion 41b into the first engagement portion 60 and the second engagement portion 70, respectively. Therefore, the bottom plate 31 has the first engagement portion 60 into which the first connection portion 41a is inserted and the second engagement portion 70 into which the second connection portion 41b is inserted.

[0076] The first elastic member 51 and the first connecting portion 41a are each inserted into the first insertion hole 63 of the first engagement portion 60. That is, the first elastic member 51 is press-fitted into the first insertion hole 63. In other words, the first engagement portion 60 defines a first insertion hole 63 into which the first elastic member 51 is press-fitted. The first elastic member 51 is supported by the first engagement portion 60 by the engagement of the first engagement upper portion 61 and the first recess 51a in the first insertion hole 63. The first elastic member 51 supported by the first engagement portion 60 faces the bottom plate upper surface 31a and is spaced apart from the bottom plate upper surface 31a. The first connecting portion 41a is supported by the first engagement portion 60 via the first elastic member 51. The first connecting portion 41a supported by the first engagement portion 60 faces the bottom plate upper surface 31a and is spaced apart from the bottom plate upper surface 31a. That is, in the radiator mounting structure 100, the first engaging portion 60 supports the radiator 40 so that the first connecting portion 41a and the bottom plate 31 are spaced apart.

[0077] The second elastic member 52 and the second connecting portion 41b are inserted into the second insertion hole 73 of the second engagement portion 70. That is, the second elastic member 52 is press-fitted into the second insertion hole 73. In other words, the second engagement portion 70 defines a second insertion hole 73 into which the second elastic member 52 is press-fitted. The second elastic member 52 is supported by the second engagement portion 70 by the engagement of the second engagement upper portion 71 and the second recess 52a in the second insertion hole 73. That is, the second insertion hole 73 is shaped to engage with the second elastic member 52. The second elastic member 52 supported by the second engagement portion 70 faces the bottom plate upper surface 31a and is spaced apart from the bottom plate upper surface 31a. Furthermore, the second connecting portion 41b is supported by the second engagement portion 70 via the second elastic member 52. The second connection portion 41b supported by the second engagement portion 70 faces the bottom plate upper surface 31a and is spaced apart from the bottom plate upper surface 31a. Therefore, the first engagement portion 60 and the second engagement portion 70 each support the radiator 40 so that the first connection portion 41a and the second connection portion 41b are spaced apart from the bottom plate 31. In other words, in the radiator mounting structure 100, the second engagement portion 70 supports the radiator 40 so that the second connection portion 41b and the bottom plate 31 are spaced apart.

[0078] <Rotation of the radiator> 7 shows a state in which the fixing plate 80 is not fixed to the first end wall 32 by each of the pair of second fixing members 82. In this state, the radiator 40 is attached to the support portion 35 by being supported by each of the first engagement portion 60 and the second engagement portion 70.

[0079] The second connection portion 41b of the radiator 40 is inserted into the second insertion hole 73 of the second engagement portion 70 together with the second elastic member 52. The second engagement portion 70 has a second cutout 74 that opens in the second direction D2. That is, the second connection portion 41b can move in the second direction D2 together with the second elastic member 52 to separate from the second engagement portion 70 along the second direction D2. For the second connection portion 41b to move in the second direction D2, the first connection portion 41a must also move in the second direction D2. However, when the first connection portion 41a is inserted into the first engagement portion 60, the first connection portion 41a cannot move in the second direction D2. That is, when the first connection portion 41a is inserted into the first engagement portion 60, the second connection portion 41b cannot separate from the second engagement portion 70 along the second direction D2.

[0080] The first connection portion 41a of the radiator 40 is inserted into the first insertion hole 63 of the first engagement portion 60 together with the first elastic member 51. The first engagement portion 60 has a first cutout portion 64 that opens toward a first direction D1 in the front-rear direction X. That is, the first connection portion 41a can move away from the first engagement portion 60 along the first direction D1 by moving together with the first elastic member 51 in the first direction D1. As shown in FIG. 7 , the first connection portion 41a can move away from the first engagement portion 60 along the first direction D1 by the radiator 40 rotating about the second connection portion 41b. The two-dot chain lines in FIG. 7 indicate the radiator 40, the fixing plate 80, and the pipe 23c that have rotated about the second connection portion 41b as the rotation axis. That is, the radiator 40 rotates around the second connection portion 41b as the center of rotation, thereby inserting the second connection portion 41b into the second insertion hole 73 and moving the first connection portion 41a away from the first engagement portion 60.

[0081] When the radiator 40 rotates around the second connection portion 41b as a rotation axis, the inlet 42a and the outlet 42b each move in the front-rear direction X. When the inlet 42a and the outlet 42b each move, the pipe 23c moves in the front-rear direction X.

[0082] [Operation of this embodiment] The operation of this embodiment will be described. The radiator mounting structure 100 supports the radiator 40 on the first end wall outer surface 32b side of the first end wall 32 by using the first engagement portion 60 and the second engagement portion 70 provided on the bottom plate 31. The radiator mounting structure 100 can move the first connection portion 41a from the first engagement portion 60 in the first direction D1 by rotating the radiator 40 around the second connection portion 41b inserted into the second engagement portion 70 as the rotation center. As the radiator 40 rotates, the radiator 40 moves away from the through hole 32c while remaining supported by the second engagement portion 70. In other words, the radiator mounting structure 100 rotates the radiator 40 in a direction away from the through hole 32c while supporting the radiator 40 on the frame 30.

[0083] [Effects of this embodiment] The effects of this embodiment will be described. (1) The radiator mounting structure 100 allows the radiator 40 to be in a state where the first connection portion 41a is separated from the first engagement portion 60 while the second connection portion 41b is inserted into the second engagement portion 70. In other words, the radiator 40 can be rotated around the second connection portion 41b inserted into the second engagement portion 70. During this rotation, the first connection portion 41a passes through the first cutout portion 64 and separates in the first direction D1, while the second connection portion 41b remains inserted into the second engagement portion 70. As a result, maintenance of components in the housing portion 34 can be performed through the through-hole 32c without removing the radiator 40 from the bottom plate 31. As described above, the radiator mounting structure 100 can improve the ease of work performed inside the frame 30.

[0084] (2) Compared to a case where the first direction D1 and the second direction D2 are not perpendicular, the radiator mounting structure 100 can more effectively maintain the state in which the second connection portion 41b is inserted into the second engagement portion 70 when the radiator 40 is rotated around the second connection portion 41b. As a result, by making the first direction D1 and the second direction D2 perpendicular to each other, the radiator mounting structure 100 can make it less likely that the second connection portion 41b will come off the second engagement portion 70 when the radiator 40 is rotated.

[0085] (3) When the radiator 40 rotates around the second connection portion 41b as the rotation center, the second elastic member 52 into which the second connection portion 41b is inserted rotates in the circumferential direction of the second insertion hole 73. In other words, in the radiator mounting structure 100, the radiator 40 rotates more easily than when the second insertion hole 73 and the second elastic member 52 are not engaged with each other. As a result, the radiator mounting structure 100 can facilitate the rotation of the radiator 40 when working inside the frame 30.

[0086] (4) With the first connection portion 41a inserted into the first insertion hole 63, the first elastic member 51 is subjected to a force by the first engagement portion 60 in a radially inward direction of the first insertion hole 63. Furthermore, in this state, the first elastic member 51 is subjected to a force in a direction opposite to the force applied by the first engagement portion 60. As a result, friction is generated between the first elastic member 51 and the first engagement portion 60, making the first elastic member 51 less likely to come off the first insertion hole 63. In other words, the radiator 40 is less likely to come off the first engagement portion 60. The same applies to the relationship between the second elastic member 52 and the second engagement portion 70. In other words, the radiator mounting structure 100 can more reliably mount the radiator 40 to the frame 30 compared to a structure not including the first elastic member 51 and the second elastic member 52.

[0087] (5) The outgoing path 23a and the returning path 23b of the cooling medium path 23 move together with the radiator 40 when the radiator 40 rotates. The outgoing path 23a and the returning path 23b are each attached to the first radiator surface 40a closer to the second connecting portion 41b in the width direction R2. This reduces the distance the radiator 40 moves when it rotates compared to when it is attached to the first radiator surface 40a closer to the first connecting portion 41a. As a result, even when the outgoing path 23a and the returning path 23b are connected to the inlet 42a and the outlet 42b of the radiator 40, respectively, the radiator 40 can rotate without applying a large load to the outgoing path 23a and the returning path 23b. In other words, the radiator mounting structure 100 can reduce the load generated on the forward path 23a and the return path 23b when the radiator 40 rotates, compared to when the inlet 42a and the outlet 42b are located closer to the first connection portion 41a on the first radiator surface 40a.

[0088] (6) The first engagement portion 60 and the second engagement portion 70 are each formed separately from the bottom plate 31. In other words, the positions of the first engagement portion 60 and the second engagement portion 70 on the bottom plate 31 can be easily changed compared to when the first engagement portion 60 and the second engagement portion 70 are integral with the bottom plate 31. As a result, in the radiator mounting structure 100, when the size of the radiator 40 in the width direction R2 is changed, for example, the positions of the first engagement portion 60 and the second engagement portion 70 can be easily changed in accordance with the change.

[0089] (7) The first connecting portion 41a and the second connecting portion 41b do not come into contact with the bottom plate 31 when the radiator 40 rotates. In other words, the radiator mounting structure 100 makes it easier for the radiator 40 to rotate compared to when the first connecting portion 41a and the second connecting portion 41b come into contact with the bottom plate 31.

[0090] (8) A fuel cell unit 20 having a fuel cell stack 22 requires more frequent maintenance than a heat generating element such as an internal combustion engine. Furthermore, the frame 30 to which the fuel cell stack 22 is attached is provided with pipes and the like through which hydrogen used for power generation by the fuel cell stack 22 flows, and it is desirable to ensure ease of access, such as by allowing work to be performed through a wide opening. The radiator mounting structure 100 improves ease of access while also enabling work to be performed through the through-hole 32c of the first end wall 32, thereby ensuring the desired ease of access to the frame 30 to which the fuel cell stack 22 is attached.

[0091] (9) Compared to vehicles such as ordinary automobiles, the fuel cell forklift 10 is expected to require more frequent maintenance. The radiator mounting structure 100 mounted on the fuel cell forklift 10 eliminates the need to remove the radiator 40 each time work is performed, improving workability on the fuel cell forklift 10. As a result, the radiator mounting structure 100 shortens the time required for each work session, enabling more frequent maintenance of the fuel cell forklift 10.

[0092] (10) Vibration of the vehicle body 11 caused by the travel of the fuel cell forklift 10 is accompanied by vibration of the housing 21. This vibration induces vibration of the radiator 40 relative to each of the housing 21 and the frame 30. In the radiator mounting structure 100, the first engagement portion 60 opens in the front-rear direction X, and therefore engages with the first connection portion 41a to restrict vibration of the radiator 40 in directions different from the front-rear direction X. Furthermore, the second engagement portion 70 opens in the left-right direction Y, and therefore engages with the second connection portion 41b to restrict vibration of the radiator 40 in directions different from the left-right direction Y. In other words, the first engagement portion 60 and the second engagement portion 70 open in different directions in a plane perpendicular to the up-down direction Z, thereby restricting vibration of the radiator 40 in a direction along that plane. As a result, the radiator mounting structure 100 can prevent the radiator 40 from colliding with the housing 21 even if the radiator 40 vibrates, by having the first engaging portion 60 and the second engaging portion 70 open in different directions.

[0093] [Example of change] The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0094] The radiator mounting structure 100 does not have to be mounted on the fuel cell forklift 10. For example, the radiator mounting structure 100 may be mounted on a standard automobile or the like. The radiator mounting structure 100 may also be mounted on something other than a vehicle, such as a stationary generator.

[0095] The heat generating element does not have to be the fuel cell stack 22. For example, the radiator mounting structure 100 may have an internal combustion engine as the heat generating element. The first engagement portion 60 may support the radiator 40 so that the first connection portion 41a contacts the bottom plate 31. The second engagement portion 70 may support the radiator 40 so that the second connection portion 41b contacts the bottom plate 31. In this case, the radiator 40 is supported by the first engagement portion 60, the second engagement portion 70, and the bottom plate 31, and therefore the load on each of the first engagement portion 60 and the second engagement portion 70 is reduced.

[0096] The first engaging portion 60 and the second engaging portion 70 may be formed on the bottom plate 31 itself by molding the bottom plate 31 . The inlet 42a and the outlet 42b may be provided at any position on the first radiator surface 40a. For example, the inlet 42a and the outlet 42b may be provided on the first radiator surface 40a closer to the first connecting portion 41a than to the second connecting portion 41b in the width direction R2.

[0097] The first recess 51a does not have to be formed in the first elastic member 51. Furthermore, the second elastic member 52 does not have to be formed in the second recess 52a. The radiator mounting structure 100 may include only one of the first elastic member 51 and the second elastic member 52.

[0098] The radiator mounting structure 100 does not have to include the first elastic member 51 and the second elastic member 52. In this case, the first connecting portion 41a of the radiator 40 is directly inserted into the first engaging portion 60, and the second connecting portion 41b is directly inserted into the second engaging portion 70.

[0099] The second cutout 74 may be open in the direction from the first engagement portion 60 toward the second engagement portion 70. The opening direction of the first cutout portion 64 and the opening direction of the second cutout portion 74 do not have to be perpendicular to each other. In other words, the second direction D2 does not have to be perpendicular to the first direction D1. As shown in Fig. 8, for example, the second cutout portion 74 may open in a direction such that the angle between the first direction D1 and the second direction D2 is 45°.

[0100] In the radiator mounting structure 100, it is desirable that the angle that the second direction D2 forms with the first direction D1 is greater than 0° and not greater than 90°. In this case, the second cutout portions 74 open in the front-rear direction X so as to move away from the first end wall 32 as they move from one second engagement portion to the other. The radiator mounting structure 100 can simplify the work of mounting the radiator 40 to each of the first engagement portions 60 and the second engagement portions 70, compared to, for example, a case in which the second cutout portions 74 open so as to move closer to the first end wall 32 as they move toward the first engagement portion 60. In other words, the above configuration simplifies the work of mounting the radiator 40 to the frame 30 in the radiator mounting structure 100.

[0101] The angle between the second direction D2 and the first direction D1 does not have to be either 45° or 90°. The point is that the second direction D2 may be any direction different from the first direction D1. [Explanation of symbols]

[0102] 10... fuel cell forklift as industrial vehicle, 11... vehicle body, 12... loading and unloading device, 22... fuel cell stack as heating element, 23... cooling medium path, 23a... outward path, 23b... return path, 30... frame, 31... bottom plate, 31a... bottom plate upper surface as upper surface, 32... first end wall as end wall, 32b... first end wall outer surface as fixing surface, 32c... through hole, 40... radiator, 40a... first radiator surface as first surface, 40b... second radiator surface as second surface, 40 d...underside of radiator as underside, 41a...first connection portion, 41b...second connection portion, 42a...inlet, 42b...outlet, 51...first elastic member, 52...second elastic member, 60...first engagement portion, 63...first insertion hole, 64...first notch portion, 70...second engagement portion, 73...second insertion hole, 74...second notch portion, 100...radiator mounting structure, D1...first direction, D2...second direction, R1...thickness direction, R2...width direction, T1...first wall thickness direction as wall thickness direction, Z...vertical direction.

Claims

1. a heat generating element, a cooling medium path through which a cooling medium for cooling the heat generating element flows, and a radiator connected to the cooling medium path are disposed above the bottom plate in a frame having a bottom plate and end walls erected from the bottom plate; the end wall has a fixing surface to which the radiator is attached by a fixing member, and the heat generating element is disposed on the surface opposite to the fixing surface, and a through hole through which the cooling medium path passes penetrates the end wall in a wall thickness direction, A first connecting portion and a second connecting portion are arranged in a width direction perpendicular to the thickness direction and the up-down direction of the radiator and protrude from a lower surface of the radiator toward the bottom plate, a bottom plate having a first engagement portion into which the first connection portion is inserted and a second engagement portion into which the second connection portion is inserted, the first engagement portion has a first notch portion that is orthogonal to the end wall and opens in a first direction that is a direction from the end wall toward the radiator, The radiator mounting structure, wherein the second engagement portion has a second notch portion that is parallel to the upper surface of the bottom plate and opens in a second direction that is different from the first direction.

2. 2. The radiator mounting structure according to claim 1, wherein the second direction forms an angle with the first direction that is greater than 0° and equal to or less than 90°.

3. 2. The radiator mounting structure according to claim 1, wherein the second direction is perpendicular to the first direction and extends from the second engaging portion toward the first engaging portion.

4. the first connection portion penetrates a cylindrical first elastic member in the up-down direction, and the first engagement portion defines a first insertion hole into which the first elastic member is press-fitted; the second connection portion penetrates a cylindrical second elastic member in the up-down direction, and the second engagement portion defines a second insertion hole into which the second elastic member is press-fitted; a diameter of the first insertion hole is larger than an opening width of the first notch portion in a direction perpendicular to the up-down direction; a diameter of the second insertion hole is larger than an opening width of the second cutout portion in a direction perpendicular to the up-down direction; 3. The radiator mounting structure according to claim 1, wherein the second insertion hole is shaped to engage with the second elastic member.

5. The cooling medium path is an outgoing path through which the cooling medium flows into the radiator; a return path through which the cooling medium flows after flowing out of the radiator, The radiator is a first surface facing the end wall in the thickness direction, and a second surface opposite the first surface, The first surface is provided with an inlet through which the cooling medium flows in from the outward path and an outlet through which the cooling medium flows out toward the return path, 3. The radiator mounting structure according to claim 1, wherein the inlet and the outlet are provided closer to the second connecting portion than to the first connecting portion in the width direction.

6. 3. The radiator mounting structure according to claim 1, wherein the first engaging portion and the second engaging portion are separate from the bottom plate.

7. the first engaging portion supports the radiator so as to be spaced apart from the first connecting portion and the bottom plate in the up-down direction; 3. The radiator mounting structure according to claim 1, wherein the second engaging portion supports the radiator such that the second connecting portion and the bottom plate are spaced apart in the up-down direction.

8. 3. The radiator mounting structure according to claim 1, wherein the heat generating element is a fuel cell stack.

9. An industrial vehicle equipped with a cargo handling device and a vehicle body, 3. The radiator mounting structure according to claim 1, wherein the radiator mounting structure is mounted on the industrial vehicle, the vehicle body of which houses the frame and the radiator.

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