JP7749438B2 - Disaster prevention vehicles - Google Patents

Description

The present invention relates to a disaster prevention vehicle equipped with a submersible pump that can be inserted into a water intake source such as the sea or a river to pump or drain large amounts of water, and a crane.

Conventionally, in the event of a large-scale fire, disaster prevention vehicles equipped with submersible pumps are used to transport water from a water intake source located away from the fire site to the fire site (see, for example, Patent Document 1). The submersible pumps on such disaster prevention vehicles are hydraulically driven and can be deployed into water intake sources such as the sea or rivers to pump large amounts of water or, conversely, to drain water. Disaster prevention vehicles are also equipped with cranes, which can be used to easily deploy and pull out the submersible pumps into and from the water intake source.

In disaster prevention vehicles such as those described in Patent Document 1, the submersible pump includes a water intake pump and a hydraulic motor that drives and rotates the water intake pump. The hydraulic pump that supplies hydraulic oil to the hydraulic motor is driven by a power take-off device (PTO) that extracts power from the disaster prevention vehicle's engine. Because this hydraulic pump requires a large amount of power to operate the submersible pump, a so-called full-power PTO is used. The full-power PTO is installed between the clutch and the transmission.

Figure 6 is a side view of the main parts showing the mounting layout of the hydraulic pump and its surrounding area of a conventional disaster prevention vehicle equipped with a crane and an underwater pump. This conventional disaster prevention vehicle comprises a pair of left and right chassis frames 102, 102 extending in the longitudinal direction, a running engine 106 mounted on the chassis frames 102, 102, a clutch and transmission unit 107 connected to the rear end of the running engine 106, a first power take-off device 111 having a power take-off shaft 111a mounted on the upper part of the clutch and transmission unit 107 and taking power from the running engine 106, a crane 104 mounted on the chassis frame 102 so as to be positioned rearward of the first power take-off device 111, a first hydraulic pump 112 driven by power taken from the first power take-off device 111 and supplying hydraulic oil to an underwater pump (not shown), and a pair of left and right mounting base frames 108, 108 interposed between the crane base 141 of the crane 104 and the chassis frames 102, 102.

Each chassis frame 102 has a main frame 102a to which the running engine 106 is attached, and a sub-frame 102b attached along the upper surface of the main frame 102a. Each mounting base frame 108 is attached along the upper surface of each sub-frame 102b. A pair of front and rear pillow blocks 116, 116 are attached to the sub-frame 102b rearward of the mounting base frame 108, and these pillow blocks 116, 116 rotatably support a spline shaft 117. One end of a first drive shaft 113 is connected to the front end of the spline shaft 117. A first hydraulic pump 112 is connected to the rear end of the spline shaft 117 via a cushion coupling 118. The other end of the first drive shaft 113 is connected to the power take-off shaft 111a of the first power take-off device 111.

In addition, conventional disaster prevention vehicles are equipped with a second power take-off device 121 that is mounted on the clutch/transmission unit 107 below the power take-off shaft 111a of the first power take-off device 111 and takes power from the traveling engine 106, and a second hydraulic pump 122 that is driven by the power taken from the second power take-off device 121 and supplies hydraulic oil to the actuator of the crane 104. The second power take-off device 121 and the second hydraulic pump 122 are connected to each other by a second drive shaft 123.

JP 2009-291289 A

In the conventional disaster prevention vehicle shown in Figure 6, the second hydraulic pump 122 is located directly below the mounting base frame 108, and hydraulic piping extending from the second hydraulic pump 122 and chassis accessories are arranged around it, reducing the excess space between the pair of left and right chassis frames 102, 102. For this reason, the first hydraulic pump 112 is mounted rearward of the mounting base frame 108, avoiding being located directly below the mounting base frame 108.

However, because the first hydraulic pump 112 was mounted rearward of the mounting base frame 108, the distance between the power take-off shaft 111a of the first power take-off device 111 and the drive shaft 112a of the first hydraulic pump 112 became longer, which meant that the power take-off shaft 111a and the drive shaft 112a could not be simply connected by a single first drive shaft 113. This was because, as the distance between the power take-off shaft 111a and the drive shaft 112a became longer, the length of the first drive shaft 113 also became longer, which increased the fluctuation around the axis of the first drive shaft 113 as it rotated. Therefore, connecting the power take-off shaft 111a and the drive shaft 112a by a single first drive shaft 113 would likely damage the first hydraulic pump 112. Additionally, the large intersection angle θ1 (approximately 6°) between the power take-off shaft 111a and the first drive shaft 113 also contributes to large fluctuations around the axis as the first drive shaft 113 rotates. Therefore, in conventional disaster prevention vehicles, in order to suppress the impact of fluctuations around the axis of the first drive shaft 113 on the first hydraulic pump 112, it was necessary to provide a spline shaft 117 supported by pillow blocks 116, 116, and a cushion coupling 118 between the first drive shaft 113 and the drive shaft 112a of the first hydraulic pump 112.

Because conventional disaster prevention vehicles have the above configuration, space is required behind the mounting base frame 108 to mount the pillow blocks 116, 116, spline shaft 117, cushion coupling 118, and first hydraulic pump 112, which creates the problem of limiting the mounting space for mounted items such as cargo boxes behind the crane 104. Another problem is the need for pillow blocks 116, 116, spline shaft 117, and cushion coupling 118, resulting in a large number of parts.

The present invention was made in consideration of these issues, and its purpose is to provide a disaster prevention vehicle equipped with a hydraulic pump mounting structure that saves space and reduces the number of parts.

The present invention provides a means for solving the above-mentioned problems as follows. Specifically, the first invention comprises a chassis frame, a traveling engine mounted on the chassis frame, a clutch and transmission unit connected to the rear end of the traveling engine, a first power take-off device having a power take-off shaft mounted above the clutch and transmission unit and taking power from the traveling engine, a crane mounted on the chassis frame so as to be located rearward of the clutch and transmission unit, a hydraulically driven underwater pump mounted rearward of the crane, a first hydraulic pump driven by power taken from the first power take-off device and supplying hydraulic oil to the underwater pump, and a mounting base frame interposed between the crane base of the crane and the chassis frame, wherein the mounting base frame is positioned above the power take-off shaft, and the first hydraulic pump is attached to the mounting base frame via a mounting bracket.

According to the first invention, the mounting bracket for the first hydraulic pump is attached to the mounting base frame, which is positioned above the power take-off shaft of the first power take-off device. This allows the mounting bracket to be attached above the chassis frame without the need for additional components for attaching the mounting bracket above the chassis frame. This allows the height position of the first hydraulic pump attached to the mounting bracket to be closer to the same height as the power take-off shaft of the first power take-off device. Furthermore, the height position of the first hydraulic pump can be positioned as close to the upper position as possible within the vertical width of the chassis frame. This allows the first hydraulic pump to be located directly below the mounting base frame while ensuring installation space below the first hydraulic pump for a crane hydraulic pump, its piping, chassis accessories, etc., thereby shortening the length of the drive shaft connecting the power take-off shaft of the first power take-off device and the drive shaft of the first hydraulic pump. Furthermore, the intersection angle between the power take-off shaft and the drive shaft can be reduced. This reduces axial movement associated with drive shaft rotation, eliminating the need for conventional spline shafts, cushion couplings, etc. As a result, the number of parts can be reduced compared to conventional systems, and by reducing the number of parts, there are fewer points of failure, improving reliability.

In addition, the first hydraulic pump can be installed directly below the mounting base frame, eliminating the need to mount the first hydraulic pump behind the mounting base frame, thereby saving space and eliminating restrictions on the mounting space for mounted items such as cargo boxes installed behind the crane. This makes it possible to provide a disaster prevention vehicle equipped with a hydraulic pump mounting structure that saves space and reduces the number of parts.

A second aspect of the present invention is characterized in that, in the first aspect, the chassis frames extend in the fore-and-aft direction and are provided in a pair on the left and right sides, the mounting base frames are provided in a pair on the left and right sides along the upper surfaces of each of the pair of left and right chassis frames, the mounting bracket has support members attached to the left and right inner sides of the pair of left and right mounting base frames, a ceiling member whose left and right ends are supported by the pair of left and right support members, and a front wall member attached to the front end of the ceiling member so as to extend downward from the ceiling member, and the first hydraulic pump is attached to the front wall member.

According to the second aspect of the present invention, the mounting bracket is attached to the mounting base frame via a support member, while the first hydraulic pump is attached to the front wall member of the mounting bracket. This allows the height position of the mounting location of the mounting bracket to the mounting base frame and the height position of the mounting location of the first hydraulic pump to be adjusted independently. Specifically, by extending the lower end of the front wall member below the support member of the mounting bracket and attaching the first hydraulic pump to the lower part of the front wall member, the mounting location of the first hydraulic pump to the front wall member can be easily adjusted to be lower than the mounting location of the support member. As a result, the height position of the drive shaft of the first hydraulic pump can be easily adjusted relative to the height position of the power take-off shaft of the first power take-off device, while taking into account the space for equipment disposed below the first hydraulic pump.

A third invention is characterized in that, in the second invention, the chassis frame has a main frame to which the running engine is attached and a subframe attached along the upper surface of the main frame, and the support member is attached across the mounting base frame and the subframe.

According to the third aspect of the invention, the support member of the mounting bracket can also be used as a member for fastening the mounting base frame and subframe, thereby contributing to reducing the number of members required for fastening the mounting base frame and subframe while increasing the rigidity near the first hydraulic pump.

A fourth invention is characterized in that, in any one of the first to third inventions, the power take-off shaft of the first power take-off device and the drive shaft of the first hydraulic pump are each inclined downward toward the rear of the vehicle, and the power take-off shaft and the drive shaft are connected to each other by being connected to both ends of a single drive shaft.

According to the fourth aspect of the invention, both the power take-off shaft of the first power take-off device and the drive shaft of the first hydraulic pump are inclined downward toward the rear of the vehicle, thereby reducing the intersection angle between the power take-off shaft and the drive shaft connected to the drive shaft, while allowing the drive shaft to be lower than the power take-off shaft. This prevents the mounting position of the mounting bracket on the mounting base frame and the height of the first hydraulic pump from being too high, allowing the vertical width of the mounting base frame to be reduced. Furthermore, by connecting the power take-off shaft and the drive shaft to both ends of a single drive shaft, the first hydraulic pump can be placed as close as possible to the first power take-off device, thereby saving space.

In a fifth invention, in any one of the first to fourth inventions, the disaster prevention vehicle further includes a second power take-off device that is provided in the clutch/transmission unit below the power take-off shaft of the first power take-off device and takes power from the traveling engine, and a second hydraulic pump that is driven by the power taken from the second power take-off device and supplies hydraulic oil to the crane actuator, and the first hydraulic pump and the second hydraulic pump are arranged side by side in the vertical direction.

According to the fifth aspect of the invention, both the first hydraulic pump for driving the submersible pump and the second hydraulic pump for driving the crane can be arranged directly below the mounting base frame. Furthermore, since the first hydraulic pump and the second hydraulic pump are arranged side by side vertically, sufficient space can be provided behind the mounting base frame for attaching mounted items such as cargo boxes.

With the disaster prevention vehicle of the present invention, the first hydraulic pump can be mounted directly below the mounting base frame, while still providing mounting space below the first hydraulic pump for a crane hydraulic pump, its piping, chassis accessories, etc. This allows the length of the drive shaft connecting the power take-off shaft of the first power take-off device to the drive shaft of the first hydraulic pump to be shortened. It also reduces the intersection angle between the power take-off shaft and the drive shaft. This reduces axial movement associated with drive shaft rotation, eliminating the need for spline shafts, cushion couplings, and other components used in conventional vehicles. As a result, the number of parts can be reduced compared to conventional vehicles, and by reducing the number of parts, there are fewer points of failure, thereby improving reliability. Furthermore, space is saved because there is no longer a need to mount the first hydraulic pump behind the mounting base frame.

1 is a side view of a disaster prevention vehicle according to an embodiment of the present invention. FIG. 2 is a side view of a main part showing the mounting layout of a hydraulic pump and its surroundings of the disaster prevention vehicle according to the present embodiment. 2 is a cross-sectional view of a main part showing the mounting layout of a hydraulic pump and its surroundings of the disaster prevention vehicle according to the present embodiment. FIG. FIG. 4 is a partial enlarged view of FIG. 3 . 1 is a simplified hydraulic circuit diagram of a disaster prevention vehicle according to an embodiment of the present invention. FIG. 10 is a side view of a main part showing the mounting layout of a hydraulic pump and its surroundings in a conventional disaster prevention vehicle.

The following describes a disaster prevention vehicle according to an embodiment of the present invention, with reference to the drawings.

Figure 1 shows a disaster prevention vehicle 1 according to one embodiment of the present invention. In the event of a large-scale fire, the disaster prevention vehicle 1 is designed to transport water from a water intake source located away from the fire site to the fire site. This disaster prevention vehicle 1 includes a cab 3 at the front of the vehicle, a cargo box 5 at the rear of the vehicle, and a crane 4 located between the cab 3 and the cargo box 5. The cab 3, crane 4, and cargo box 5 are mounted on a pair of left and right chassis frames 2, 2. The chassis frames 2, 2 extend in the fore-and-aft direction and include a pair of left and right main frames 2a, 2a and a pair of left and right sub-frames 2b, 2b attached along the upper surfaces of the main frames 2a, 2a (see Figure 4). The sub-frame 2b is located behind the cab 3, extending from a position near the cab 3 to the rear end of the vehicle. The crane 4 is hydraulically driven by hydraulic oil supplied from a second hydraulic pump 22.

2 is a side view of a key portion of the disaster prevention vehicle 1 according to this embodiment, showing the mounting layout of the first hydraulic pump 12 and its surroundings. FIG. 3 is a cross-sectional view of a key portion of the disaster prevention vehicle 1 according to this embodiment, showing the mounting layout of the first hydraulic pump 12 and its surroundings. FIG. 4 is a partially enlarged view of FIG. 3. As shown in FIGS. 1 to 4, the disaster prevention vehicle 1 includes a traveling engine 6 mounted on a pair of left and right main frames 2a, a clutch and transmission unit 7 connected to the rear end of the traveling engine 6, a first power takeoff device 11 that extracts power from the traveling engine 6, a crane 4 mounted on the chassis frame 2 so as to be positioned rearward of the clutch and transmission unit 7, a hydraulically driven submersible pump 9 mounted behind the crane 4, a first hydraulic pump 12 that is driven by power extracted from the first power takeoff device 11 and supplies hydraulic oil to the submersible pump 9, and a pair of left and right mounting base frames 8 that are interposed between the crane base 41 of the crane 4 and the pair of left and right subframes 2b.

The clutch/transmission unit 7 has a clutch at the front and a transmission at the rear. The first power take-off device 11 is a so-called full-power PTO, and is installed between the clutch and transmission of the clutch/transmission unit 7. The first power take-off device 11 has a power take-off shaft 11a installed at the top of the casing of the clutch/transmission unit 7. The power take-off shaft 11a of the first power take-off device 11 is inclined so that its axial direction descends toward the rear of the vehicle. The tip of the power take-off shaft 11a is located midway between the front and rear of the clutch/transmission unit 7, and its height position is at the same height as the subframe 2b.

A pair of mounting base frames 8 are provided on the left and right sides, each aligned along the top surface of a pair of left and right sub-frames 2b. The mounting base frame 8 has a channel member 8a with a U-shaped cross section and an opening facing inward on the left and right sides, and a strip member 8b attached to cover the opening of the channel member 8a. The mounting base frame 8 is positioned above the power take-off shaft 11a of the first power take-off device 11. Like the mounting base frame 8, the sub-frame 2b also has a channel member 2c with a U-shaped cross section and an opening facing inward on the left and right sides, and a strip member 2d attached to cover the opening of the channel member 2c.

The crane base 41 of the crane 4 is fixed by welding or other means to the upper surfaces of the pair of left and right mounting base frames 8, 8. As shown in Figure 3, the crane 4 comprises a crane support platform 42 attached to the center of the crane base 41, a column post 44 attached to the upper end of the crane support platform 42 via a swivel section 43, a boom 45 rotatably attached to the upper end of the column post 44, and outriggers 46 attached to both left and right ends of the crane base 41.

A mounting bracket 17 for securing the first hydraulic pump 12 is attached between the pair of left and right mounting base frames 8, 8. The mounting base frame 108 of a conventional disaster prevention vehicle, as shown in Figure 6, is provided to secure a crane 104 to the chassis frame 102, and it was not thought of to attach other components to the mounting base frame 108. However, the disaster prevention vehicle 1 of this embodiment employs a novel structure in which the mounting bracket 17 is attached to the mounting base frame 8. As shown in Figures 2 to 4, the mounting bracket 17 includes support members 17a attached to the left and right inner sides of the pair of left and right mounting base frames 8, a ceiling member 17b whose left and right ends are supported by the pair of left and right support members 17a, 17a, and a front wall member 17c attached to the front end of the ceiling member 17b and extending downward from the ceiling member 17b.

The support member 17a has a structure in which a reinforcing plate is attached to an angle member, and is fixed to the strip member 8b of the mounting base frame 8 using fastening members 17d such as bolts and nuts. Furthermore, the support member 17a is attached not only to the mounting base frame 8, but also to the subframe 2b. Specifically, the support member 17a is fixed to the strip member 2d of the subframe 2b using fastening members 17d such as bolts and nuts. In other words, the support member 17a is attached across the mounting base frame 8 and the subframe 2b. In this embodiment, the support member 17a is attached across the mounting base frame 8 and the subframe 2b, but the support member 17a may also be attached only to the mounting base frame 8.

The ceiling member 17b is formed in a plate shape, and its left and right ends are fixed to the support member 17a by fastening members 17d such as bolts and nuts. As shown in Figure 2, the ceiling member 17b is attached at an angle that slopes downward toward the rear of the vehicle when viewed from the left and right of the disaster prevention vehicle 1.

The front wall member 17c is formed in a plate shape, and its upper end is attached to the ceiling member 17b by welding or the like. The front wall member 17c may be formed integrally with the ceiling member 17b rather than being attached to the ceiling member 17b by welding or the like. The front wall member 17c is attached so as to be approximately perpendicular to the ceiling member 17b. In other words, when viewed from the left and right of the disaster prevention vehicle 1, the front wall member 17c is attached at an angle that rises toward the rear of the vehicle. The first hydraulic pump 12 is attached to the lower part of the front wall member 17c using fastening members (not shown). The first hydraulic pump 12 is thus attached to the mounting base frame 8 via the mounting bracket 17.

The front wall member 17c also has a hole (not shown) through which the drive shaft 12a of the first hydraulic pump 12 protrudes forward beyond the front wall member 17c. The axial direction of the drive shaft 12a is perpendicular to the surface of the front wall member 17c. Therefore, the drive shaft 12a is inclined downward toward the rear of the vehicle. The tip of the drive shaft 12a is located near the rear end of the clutch/transmission unit 7, and its height position is at the same height as the subframe 2b.

The power take-off shaft 11a of the first power take-off device 11 and the drive shaft 12a of the first hydraulic pump 12 are connected to both ends of a single first drive shaft 13, thereby linking them together. More specifically, the first drive shaft 13 has a spline shaft 13a and a pair of universal joints 13b, 13b provided at both ends of the spline shaft 13a. The power take-off shaft 11a and the drive shaft 12a are each connected to the universal joint 13b of the first drive shaft 13.

The tip of the power take-off shaft 11a and the tip of the drive shaft 12a are both at the same height as the subframe 2b, but the tip of the power take-off shaft 11a is slightly higher than the tip of the drive shaft 12a. Therefore, the first drive shaft 13 is tilted downward toward the rear of the vehicle, but because both the power take-off shaft 11a and the drive shaft 12a are tilted downward toward the rear of the vehicle, the intersection angle between the power take-off shaft 11a and the first drive shaft 13 is small. In this embodiment, this intersection angle θ2 is approximately 2° (in the conventional structure shown in Figure 6, the intersection angle θ1 was approximately 6°).

In this embodiment, the disaster prevention vehicle 1 further includes a second power take-off device 21 that is mounted on the clutch/transmission unit 7 below the power take-off shaft 11a of the first power take-off device 11 and takes power from the traveling engine 6, and a second hydraulic pump 22 that is driven by the power taken from the second power take-off device 21 and supplies hydraulic oil to the crane actuator 25 (see Figure 5) of the crane 4.

The second power take-off device 21 is a so-called transmission PTO and is provided to the side of the transmission portion of the clutch/transmission unit 7. The power take-off shaft of the second power take-off device 21 and the drive shaft of the second hydraulic pump 22 are connected to each other by being connected to both ends of a single second drive shaft 23. The second hydraulic pump 22 is attached to the main frame 2a by a mounting bracket 18 so that it is positioned slightly below the main frame 2a, but it may also be attached to the subframe 2b. The second hydraulic pump 22 has smaller external dimensions than the first hydraulic pump 12. In this embodiment, the first hydraulic pump 12 and second hydraulic pump 22 are arranged side by side in the vertical direction.

Figure 5 is a simplified hydraulic circuit diagram of the disaster prevention vehicle 1 according to this embodiment. As shown in Figure 5, the submersible pump 9 of this embodiment includes a pump-driving hydraulic motor 15 and a water intake pump 16 driven by the pump-driving hydraulic motor 15. The submersible pump 9 is transported inside the cargo box 5 of the disaster prevention vehicle 1 (see Figure 1), and when in use, is dropped into a water intake source such as a river using the crane 4. The pump-driving hydraulic motor 15 of the submersible pump 9 is controlled by the submersible pump control valve 14. The first hydraulic pump 12, the submersible pump control valve 14, the pump-driving hydraulic motor 15, and the first hydraulic oil tank 31a are connected by hydraulic lines L1 to L4, forming a hydraulic oil supply path from the first hydraulic pump 12 to the pump-driving hydraulic motor 15. Meanwhile, the crane actuator 25 of the crane 4 is controlled by the crane control valve 24. The second hydraulic pump 22, crane control valve 24, crane actuator 25, and second hydraulic oil tank 31b are connected by hydraulic lines L5 to L8, forming a hydraulic oil supply path from the second hydraulic pump 22 to the crane actuator 25.

As described above, the disaster prevention vehicle 1 according to this embodiment comprises a chassis frame 2, a running engine 6 mounted on the chassis frame 2, a clutch and transmission unit 7 connected to the rear end of the running engine 6, a first power take-off device 11 having a power take-off shaft 11a mounted on the upper part of the clutch and transmission unit 7 and taking power from the running engine 6, a crane 4 mounted on the chassis frame 2 so as to be positioned rearward of the clutch and transmission unit 7, a hydraulically driven submersible pump 9 mounted behind the crane 4, a first hydraulic pump 12 driven by power taken from the first power take-off device 11 and supplying hydraulic oil to the submersible pump 9, and a mounting base frame 8 interposed between the crane base 41 of the crane 4 and the chassis frame 2. The mounting base frame 8 is positioned above the power take-off shaft 11a, and the first hydraulic pump 12 is attached to the mounting base frame 8 via a mounting bracket 17.

With the above configuration, the mounting bracket 17 of the first hydraulic pump 12 is attached to the mounting base frame 8, which is positioned above the power take-off shaft 11a of the first power take-off device 11. This allows the mounting bracket 17 to be attached above the chassis frame 2 without the need for additional components for attaching the mounting bracket 17 above the chassis frame 2. This allows the height position of the first hydraulic pump 12 attached to the mounting bracket 17 to be as close to the same height as the power take-off shaft 11a of the first power take-off device 11. Furthermore, the height position of the first hydraulic pump 12 can be as close to the upper position as possible in the vertical width of the chassis frame 2. This allows the first hydraulic pump 12 to be installed directly below the mounting base frame 8 while ensuring installation space below the first hydraulic pump 12 for the second hydraulic pump 22 for the crane, its piping, chassis accessories, etc., and shortens the length of the first drive shaft 13 connecting the power take-off shaft 11a of the first power take-off device 11 and the drive shaft 12a of the first hydraulic pump 12. Additionally, the intersection angle between the power take-off shaft 11a and the first drive shaft 13 can be reduced. This reduces fluctuations around the axis caused by the rotation of the first drive shaft 13, eliminating the need for the conventional pillow block 116, spline shaft 117, and cushion coupling 118. As a result, the number of parts can be reduced compared to conventional systems, and by reducing the number of parts, there are fewer points of failure, improving reliability.

In addition, the first hydraulic pump 12 can be installed directly below the mounting base frame 8, eliminating the need to mount the first hydraulic pump 12 behind the mounting base frame 8, thereby saving space and eliminating restrictions on the mounting space for mounted items such as cargo boxes 5 installed behind the crane 4.

In addition, in this embodiment, the chassis frames 2 extend in the front-to-rear direction and are provided in a pair on the left and right sides. The mounting base frames 8 are provided in a pair on the left and right sides so as to fit along the upper surfaces of each of the pair of left and right chassis frames 2. The mounting bracket 17 has support members 17a attached to the left and right inner sides of the pair of left and right mounting base frames 8, a ceiling member 17b whose left and right ends are supported by the pair of left and right support members 17a, 17a, and a front wall member 17c attached to the front end of the ceiling member 17b so as to extend downward from the ceiling member 17b, and the first hydraulic pump 12 is attached to the front wall member 17c.

With the above configuration, the mounting bracket 17 is attached to the mounting base frame 8 via the support member 17a, while the first hydraulic pump 12 is attached to the front wall member 17c of the mounting bracket 17. This allows the height position of the mounting location of the mounting bracket 17 to the mounting base frame 8 and the height position of the mounting location of the first hydraulic pump 12 to be adjusted independently. Specifically, by extending the lower end of the front wall member 17c below the support member 17a and attaching the first hydraulic pump 12 to the lower part of the front wall member 17c, the mounting location of the first hydraulic pump 12 to the front wall member 17c can be easily adjusted to be lower than the mounting location of the support member 17a. As a result, the height position of the drive shaft 12a of the first hydraulic pump 12 relative to the height position of the power take-off shaft 11a of the first power take-off device 11 can be easily adjusted while taking into account the space for equipment disposed below the first hydraulic pump 12.

In addition, in this embodiment, the chassis frame 2 has a main frame 2a to which the running engine 6 is attached, and a subframe 2b attached along the upper surface of the chassis frame 2. The support member 17a of the mounting bracket 17 is attached across the mounting base frame 8 and the subframe 2b, so the support member 17a can also be used as a member for fastening the mounting base frame 8 and the subframe 2b.

In addition, in this embodiment, the power take-off shaft 11a of the first power take-off device 11 and the drive shaft 12a of the first hydraulic pump 12 are each inclined downward toward the rear of the vehicle. This reduces the intersection angle between the power take-off shaft 11a and the first drive shaft 13 connected to the drive shaft 12a, while allowing the drive shaft 12a to be positioned lower than the power take-off shaft 11a. This prevents the attachment position of the mounting bracket 17 and the height of the first hydraulic pump 12 from being too high relative to the mounting base frame 8, thereby reducing the vertical width of the mounting base frame 8. Furthermore, by connecting the power take-off shaft 11a and the drive shaft 12a to both ends of a single first drive shaft 13, the first hydraulic pump 12 can be positioned as close as possible to the first power take-off device 11, thereby saving space.

In this embodiment, the disaster prevention vehicle 1 further includes a second power take-off device 21 that is mounted on the clutch/transmission unit 7 below the power take-off shaft 11a of the first power take-off device 11 and takes power from the traveling engine 6, and a second hydraulic pump 22 that is driven by the power taken from the second power take-off device 21 and supplies hydraulic oil to the crane actuator 25 of the crane 4. The first hydraulic pump 12 and the second hydraulic pump 22 are arranged vertically side by side. This allows both the first hydraulic pump 12 for driving the submersible pump 9 and the second hydraulic pump 22 for driving the crane 4 to be arranged directly below the mounting base frame 8. Furthermore, because the first hydraulic pump 12 and the second hydraulic pump 22 are arranged vertically side by side, sufficient space can be provided behind the mounting base frame 8 for attaching mounted items such as cargo boxes 5.

The embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. The technical scope of the present invention should not be interpreted solely in terms of the above-described embodiments, but should be defined based on the claims. Furthermore, the technical scope of the present invention includes all modifications that are equivalent in meaning to and within the scope of the claims.

REFERENCE SIGNS LIST 1 disaster prevention vehicle 2 chassis frame 2a main frame 2b subframe 4 crane 6 traveling engine 7 clutch and transmission section 8 mounting base frame 9 underwater pump 11 first power take-off device 11a power take-off shaft 12 first hydraulic pump 12a drive shaft 13 first drive shaft 17 mounting bracket 17a support member 17b ceiling member 17c front wall member 21 second power take-off device 22 second hydraulic pump 25 crane actuator 41 crane base

Claims (5)

a chassis frame, a traveling engine provided on the chassis frame, a clutch and transmission unit connected to the rear end of the traveling engine, a first power take-off device having a power take-off shaft provided on an upper part of the clutch and transmission unit and taking out power from the traveling engine, a crane provided on the chassis frame so as to be located rearward of the clutch and transmission unit, a hydraulically driven underwater pump mounted on the rear of the crane, a first hydraulic pump driven by power taken out from the first power take-off device and supplying hydraulic oil to the underwater pump, and a mounting base frame interposed between the top and bottom of the crane base and the chassis frame,
The mounting base frame is disposed above the power take-off shaft,
The disaster prevention vehicle, characterized in that the first hydraulic pump is attached to the mounting base frame via a mounting bracket. The chassis frame extends in the front-rear direction and is provided in a pair on the left and right.
The mounting base frames are provided in pairs on the left and right sides along the upper surfaces of the pair of left and right chassis frames,
The mounting bracket includes support members attached to the left and right inner sides of the pair of left and right mounting base frames, respectively, a ceiling member whose left and right end portions are supported by the pair of left and right support members, and a front wall member provided at a front end of the ceiling member so as to extend downward from the ceiling member,
2. The disaster prevention vehicle according to claim 1, wherein the first hydraulic pump is attached to the front wall member. the chassis frame includes a main frame to which the engine is attached and a subframe attached along an upper surface of the main frame,
3. The disaster prevention vehicle according to claim 2, wherein the support member is attached across the mounting base frame and the sub-frame. A disaster prevention vehicle as described in any one of claims 1 to 3, characterized in that the power take-off shaft of the first power take-off device and the drive shaft of the first hydraulic pump are each inclined downward toward the rear of the vehicle, and the power take-off shaft and the drive shaft are connected to each other by being connected to both ends of a single drive shaft. a second power take-off device that is provided in the clutch/transmission unit at a position lower than the power take-off shaft of the first power take-off device and that takes out power from the traveling engine; and a second hydraulic pump that is driven by the power taken out from the second power take-off device and that supplies hydraulic oil to an actuator of the crane,
5. The disaster prevention vehicle according to claim 1, wherein the first hydraulic pump and the second hydraulic pump are arranged side by side in a vertical direction.