Loading vehicle

Abstract

To suppress interference between a chassis component and an intermediate hydraulic hose by preventing the intermediate hydraulic hose from hanging down with respect to a sub frame in a case where a cargo box is either in the horizontal state or the maximum tilting state.SOLUTION: A hydraulic pipe 8 comprises: a sub frame side hydraulic pipe 30 which is provided in a chassis 2 and a sub frame 4 and which does not move following the tilting of a cargo box 10; a cargo box side hydraulic pipe 40 which is provided in the cargo box and tilts together with the cargo box following the tilting of the cargo box; and an intermediate hydraulic hose 50 which is deformed following the tilting of the cargo box. The intermediate hydraulic hose comprises: a flexible part; a first connection end 50b which is connected to a terminal part 31a of the sub frame side hydraulic pipe 30; and a second connection end 50c which is connected to a starting end part 41a of the cargo box side hydraulic pipe 40. The maximum tilting line BO connecting the second connection end and the axial center O of the tilting center axis 5 in the maximum tilting of the cargo box is on the opposite side to the horizontal tilting line AO connecting the second connection end and the axial center in the time in which the cargo box is horizontal with respect to the reference line DO connecting the first connection end and the axial center.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present invention relates to a cargo handling vehicle having a tiltable cargo box, and more particularly to an improvement in its piping structure. [Background technology]

[0002] A cargo handling vehicle having a tiltable cargo box via a subframe on a drivable chassis is known (see, for example, Patent Document 1). In this cargo handling vehicle, the cargo box has multiple hydraulic actuators, and hydraulic piping for driving these hydraulic actuators is connected to the subframe side and the cargo box side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-142601 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a conventional vehicle having a tiltable cargo box, as illustrated in FIG. 6, when the cargo box is horizontal, the intermediate hydraulic hose 150 at the rear of the subframe 104 may hang down below the lower end of the subframe 104 and interfere with chassis parts. In a vehicle having a cargo box, the chassis is generally manufactured by a chassis manufacturer, and the body manufacturer mounts the subframe and the cargo box on the chassis to complete the vehicle. The body manufacturer must avoid the intermediate hydraulic hose 150 hanging down below the subframe 104 and interfering with the chassis parts, which may affect the running performance or damage the intermediate hydraulic hose 150 during running. As a countermeasure, a square pipe may be attached to the lower part of the main frame of the subframe 104 to raise the height. However, the attachment of this square pipe for raising the height does not contribute to improving the basic performance, but rather simply increases the weight and the overall height of the vehicle, which is a problem in that it deteriorates the productability. In addition, in the case of a garbage truck having a garbage collection box, the impact is even greater because raising the height increases the ground height of the garbage inlet opening on the garbage collection box, resulting in a decrease in workability when putting in the collected material.

[0005] The present invention has been made in consideration of these points, and its object is to suppress interference between the chassis components and the intermediate hydraulic hose by preventing the intermediate hydraulic hose from hanging down below the subframe, whether the cargo box is horizontal or at its maximum tilt. [Means for solving the problem]

[0006] In order to achieve the above object, in this invention, the required hose attachment length is matched as closely as possible between the horizontal position of the cargo box during travel, etc. and the maximum tilted position of the cargo box during dumping, etc., so that the intermediate hydraulic hose does not sag downward in the travelling position.

[0007] Specifically, in a first aspect of the present invention, a subframe provided on a chassis, A cargo box tiltably mounted on the subframe via a tilt cylinder; A hydraulic actuator provided on the container; a hydraulic source for supplying high-pressure oil to the hydraulic actuator; a hydraulic piping for circulating high-pressure oil between the hydraulic source and the hydraulic actuator, The cargo box is configured to be tiltable around a tilting central axis at the rear end of the cargo box frame of the cargo box between a horizontal state and a maximum tilted state, The hydraulic piping is as follows: A subframe-side hydraulic pipe that is provided on the chassis and the subframe and does not move in accordance with the tilting of the cargo box; A cargo box side hydraulic pipe provided on the cargo box and tilting together with the cargo box as the cargo box tilts; an intermediate hydraulic hose that connects a terminal end of a first metal pipe of the subframe side hydraulic piping to a starting end of a second metal pipe of the box side hydraulic piping located rearward of the terminal end and changes shape in accordance with the tilting of the box; the intermediate hydraulic hose has a flexible portion, a first connection end portion made of metal provided at an end portion of the flexible portion on the side of the first metal pipe and connected to the terminal end portion of the first metal pipe, and a second connection end portion made of metal provided at an end portion of the flexible portion on the side of the second metal pipe and connected to the starting end portion of the second metal pipe, The maximum tilting line connecting the second connection end and the axis of the tilting central shaft at the maximum tilting of the packing box is With respect to a reference line connecting the first connection end and the axis, It is on the opposite side of a horizontal tilting line connecting the second connection end and the axis when the packing box is in a horizontal position.

[0008] According to the above configuration, by providing the horizontal tilt line and the maximum tilt line on opposite sides of the reference line, it is possible to reduce the difference between the hose attachment length required to connect the start end of the second metal pipe of the hydraulic pipe on the box side and the end end of the first metal pipe of the hydraulic pipe on the subframe side when the box is at its maximum tilt and the hose attachment length required to connect the start end of the second metal pipe of the hydraulic pipe on the box side and the end end of the first metal pipe of the hydraulic pipe on the subframe side when the box is at its horizontal position. As a result, even if the length of the intermediate hydraulic hose is set so that the intermediate hydraulic hose does not hang down below the subframe when the box is at its horizontal position, the intermediate hydraulic hose does not become short in length when the box is at its maximum tilt, so that the sagging of the intermediate hydraulic hose can be easily suppressed. As a result, it is possible to suppress interference between the chassis parts and the intermediate hydraulic hose without adding a part to the subframe to raise the intermediate hydraulic hose as in the conventional case. In addition, according to the configuration of the first invention, by locating the horizontal tilting line and the maximum tilting line on opposite sides of the reference line, the intermediate hydraulic hose can be deformed in a balanced manner above and below the reference line when tilting the cargo box, and the behavior of the intermediate hydraulic hose can be easily controlled.

[0009] In the second invention, in the first invention, The terminal end of the first metal pipe is inclined upward and rearward.

[0010] According to the above configuration, the first metal pipe does not move in accordance with the tilting of the packing box, so the first connection end of the intermediate hydraulic hose always faces upward. Therefore, when the packing box is tilted to the maximum, the flexible portion of the intermediate hydraulic hose is deformed into a large arch overall, and when the packing box is horizontal, the flexible portion of the intermediate hydraulic hose becomes arched from the first metal pipe (first connection end) toward the second metal pipe (second connection end), and then bulges downward again toward the second metal pipe (second connection end), so that it is deformed into an S-shape. Therefore, when the packing box is horizontal, the intermediate hydraulic hose is even less likely to sag below the subframe.

[0011] In the third invention, in the second invention, The starting end of the second metal pipe is arranged so that when the cargo box is horizontal, it is located lower than the ending end of the first metal pipe and overlaps with the subframe when viewed from the side of the vehicle.

[0012] According to the above configuration, the flexible portion of the intermediate hydraulic hose can be reliably deformed into an S-shape when the cargo box is horizontal, making it even more difficult for the intermediate hydraulic hose to sag below the subframe when the cargo box is horizontal.

[0013] In a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, The second metal extends downwardly from the packing box toward the starting end of the second metal pipe, and then is bent so as to extend toward the front of the packing box.

[0014] According to the above configuration, the starting end of the hydraulic piping on the cargo box side can be set to be horizontal when the cargo box is horizontal and to be inclined upward when the cargo box is tilted to its maximum extent. Therefore, regardless of the position of the starting end of the second metal piping of the cargo box side hydraulic piping, which moves in conjunction with the tilting of the cargo box, the intermediate hydraulic hose can be prevented from hanging down below said starting end. Effect of the Invention

[0015] As described above, according to the present invention, the intermediate hydraulic hose can be prevented from hanging down below the subframe whether the cargo box is horizontal or at its maximum tilt, and interference between the chassis components and the intermediate hydraulic hose can be suppressed. [Brief description of the drawings]

[0016] [Figure 1A] FIG. 2 is an enlarged side view showing the axis of the tilting central axis of the packing box when it is horizontal and its surroundings. [Figure 1B] FIG. 1B is a plan view of a main part corresponding to FIG. 1A. [Diagram 2] 1 is a side view showing a trash collection vehicle according to an embodiment of the present invention, in which a packing box is in a horizontal position. [Diagram 3]FIG. 2 is a side view showing a maximum tilting (dumping) of a packing box in the refuse collection vehicle according to the embodiment of the present invention. [Figure 4] 1 shows hydraulic piping related to a packing box, (a) being a plan view and (b) being a side view. [Diagram 5] FIG. 2 is a simplified hydraulic circuit diagram of a refuse collection vehicle according to an embodiment of the present invention. [Figure 6] FIG. 1B is a side view corresponding to FIG. 1A according to the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] (Embodiment 1) Figures 2 and 3 show a refuse collection vehicle 1 as a loading vehicle having a tiltable cargo box according to an embodiment of the present invention. This refuse collection vehicle 1 is equipped with a drivable chassis 2, a driver's cab 3, and a cargo box 10 mounted on the chassis 2 via a subframe 4 so as to be tiltable.

[0019] The packing box 10 in this embodiment is a packing box for collecting garbage, and this packing box 10 is provided with a garbage storage box 11 and a garbage input box 12 that is rotatable around a rotation shaft 13 at the upper rear end of the garbage storage box 11. A garbage loading device 9 is built into this garbage input box 12, and garbage input from a garbage input port 14 by this garbage loading device 9 is compressed and stored in the garbage storage box 11.

[0020] As shown in FIG. 3, the packing box 10 is tilted upward with the trash insertion box 12 open, so that the trash inside the trash collection box 11 can be discharged.

[0021] A cargo box frame 15 extending in the front-rear direction is provided at the bottom of the cargo box 10. The cargo box 10 is configured to be tiltable around a tilting central axis 5 at the rear end of the cargo box frame 15 between a horizontal state (shown in FIG. 2) and a maximum tilted state (a dump state shown in FIG. 3).

[0022] A subframe 4 is provided on a chassis 2 of the refuse collection vehicle 1. A packing box 10 is mounted on the subframe 4 via a tilting cylinder 6 and a tilting link 7 so as to be tiltable.

[0023] Although the detailed configuration is not shown, as shown in FIG. 5, in this embodiment, the garbage loading device 9 is of a rotating plate type and is equipped with a hydraulic actuator, a rotating cylinder 64 that rotates the garbage drop box 12 to open and close it, a pushing cylinder 65 that drives the pushing plate between the pushing position and the return position, and a hydraulic motor 66 that rotates the rotating plate forward and backward.

[0024] A hydraulic pump 60 serving as a hydraulic source for supplying high-pressure oil to the hydraulic actuator is provided on the chassis 2. The hydraulic pump 60 is driven by a power take-off device (PTO 62) that takes off power from an engine 61 provided on the chassis 2.

[0025] Between the hydraulic pump 60 and the hydraulic actuator, a hydraulic pipe 8 for circulating high-pressure oil is provided.

[0026] For example, oil from the hydraulic pump 60 passes through the main control valve 63 on the subframe 4 side, and then passes through the hydraulic piping 8 of this embodiment to the cargo box side control valve 67. By switching the operation of this cargo box side control valve 67, the oil is sent to each actuator as appropriate and returned to the hydraulic oil tank 68.

[0027] Incidentally, since the tilt cylinder 6 is located on the subframe 4 side, hydraulic oil is supplied from the main control valve 63 without passing through the cargo box side control valve 67.

[0028] As also shown in Figure 4, the hydraulic piping 8 is provided on the chassis 2 and the subframe 4, and comprises subframe side hydraulic piping 30 which does not move as the cargo box 10 tilts, cargo box side hydraulic piping 40 which is provided on the cargo box 10 and tilts together with the cargo box 10 as the cargo box 10 tilts, and an intermediate hydraulic hose 50 which connects the terminal end 31a of the first metal piping 31 of the subframe side hydraulic piping 30 to the starting end 41a of the second metal piping 41 of the cargo box side hydraulic piping 40 which is located rearward of the terminal end 31a, and which changes shape as the cargo box 10 tilts.

[0029] As shown in FIG. 1A, the second metal pipe 41 of this embodiment is composed of a horizontal tube 41b extending horizontally forward from the rear end of the packing box frame 15, an elbow 41c, a J-shaped bent tube 41d extending directly downward from the elbow 41c, a coupler 41e, and the like. In this manner, the starting end 41a of the second metal pipe 41 extends downward from the packing box and then bends to extend forward from the packing box. In addition, the starting end 41a of the second metal pipe 41 is disposed so as to be in a position lower than the terminal end 31a of the first metal pipe 31 and overlap with the subframe 4 when viewed from the side of the vehicle when the packing box 10 is horizontal. The bent tube 41d may be composed of three members: a straight tube extending vertically, one elbow, and a straight tube extending longitudinally.

[0030] The intermediate hydraulic hose 50 has a flexible portion 50a formed mainly from rubber and easily deformable, a first connecting end 50b made of metal provided at the end of the flexible portion 50a on the first metal pipe 31 side and connected to the terminal end 31a of the first metal pipe 31, and a second connecting end 50c made of metal provided at the end of the flexible portion 50a on the second metal pipe 41 side and connected to the starting end 41a of the second metal pipe 41.

[0031] As shown in FIG. 1A, the maximum tilt line BO connecting the second connection end 50c (B) of the hydraulic hose 50 and the axis O of the tilting central shaft 5 when the cargo box 10 is tilted to the maximum is on the opposite side of the horizontal tilt line AO ​​connecting the second connection end 50c (A) and the axis O when the cargo box 10 is horizontal, relative to the reference line DO connecting the first connection end 50b (D) of the hydraulic hose 50 and the axis O.

[0032] In this embodiment, the angle β at maximum tilt between the reference line DO and the maximum tilt line BO is larger than the angle α at horizontal between the reference line DO and the horizontal tilt line AO ​​(β>α).

[0033] Furthermore, the end portion 31a of the first metal pipe 31 of the subframe side hydraulic pipe 30 is inclined upward toward the rear. The flexible portion 50a of the intermediate hydraulic hose 50 is configured to rise upward in a mountain shape from the first metal pipe 31 (first connection end 50b) toward the second metal pipe 41 (second connection end 50c) when the packing box 10 is horizontal, and then deform so as to hang down downward, and to deform in an upward mountain shape overall when the packing box 10 is tilted to the maximum.

[0034] Next, the operation of the garbage collection vehicle 1 according to this embodiment will be described.

[0035] First, as shown in FIG. 6, in a conventional refuse collection vehicle, when the cargo box is tilted to its maximum extent, the flexible portion 150a(X) of the intermediate hydraulic hose 150 bulges upward significantly, and when the cargo box frame 115 is horizontal with respect to the subframe 104, the flexible portion 150a(Y) of the intermediate hydraulic hose 150 hangs down so as to bulge downward significantly, and hangs down below the underside of the subframe 104.

[0036] In conventional garbage collection vehicles, whether the cargo box is horizontal or at its maximum tilt, the starting end of the second metal pipe 141 of the hydraulic piping on the cargo box side and the second metal connection end 150c of the hydraulic hose 151 connected to the starting end of this second metal pipe 141 were positioned above the reference line DO connecting the first metal connection end 150b of the hydraulic hose 151 connected to the ending end of the first metal pipe 131 of the hydraulic piping on the subframe side and the axis O of the tilting central axis of the cargo box.

[0037] However, in the garbage collection vehicle 1 of this embodiment, the horizontal tilt line AO ​​when the cargo box 10 is horizontal and the maximum tilt line BO when the cargo box 10 is maximum tilted are located on opposite sides of the reference line DO, thereby reducing the difference between the hose attachment length required to connect the starting end 41a of the second metal piping 41 of the cargo box side hydraulic piping 40 at the cargo box 10's maximum tilt and the hose attachment length required to connect the starting end 41a of the second metal piping 41 to the ending end 31a of the first metal piping 31 when the cargo box 10 is horizontal.

[0038] Furthermore, since the first metal pipe 31 does not move with the tilting of the packing box 10 and the end of the intermediate hydraulic hose 50 on the first metal pipe side is always facing upward, when the packing box 10 is at its maximum tilt, the flexible portion 50a(X) of the intermediate hydraulic hose 50 is deformed into a large arch shape overall. When the packing box 10 is horizontal, the flexible portion 50a(Y) of the intermediate hydraulic hose 50 becomes arched from the first metal pipe 31 (first connection end 50b) toward the second metal pipe 41 (second connection end 50c) (arched portion in FIG. 1A), and then bulges downward again toward the second metal pipe 41 (second connection end 50c), so that it is deformed into an S-shape. Therefore, when the packing box 10 is horizontal, the intermediate hydraulic hose 50 is less likely to hang down below the subframe 4.

[0039] On the other hand, at the maximum tilt shown in Fig. 3, high-pressure oil is fed from the main control valve 63 into the rotating cylinder 64 to open the trash bin 12, while high-pressure oil is also fed into the tilting cylinder 6 to tilt the trash collection box 11 and discharge the trash inside the trash collection box 11. At this time, as shown by the two-dot chain line in Fig. 1A, the intermediate hydraulic hose 50 forms a convex portion that bulges significantly upward. Therefore, the intermediate hydraulic hose 50 does not become taut or sag as the loading box 10 tilts.

[0040] In addition, the start end 41a of the second metal piping 41 is horizontal when the cargo box 10 is horizontal and inclines upward when the cargo box 10 is tilted to the maximum extent, so that the flexible portion 50a of the intermediate hydraulic hose 50 can be reliably deformed into an S-shape when the cargo box 10 is horizontal. Furthermore, the start end 41a of the second metal piping 41 is disposed so that when the cargo box 10 is horizontal, it is located lower than the end end 31a of the first metal piping 31 and overlaps with the subframe 4 when viewed from the side of the vehicle, so that the flexible portion 50a of the intermediate hydraulic hose 50 can be reliably deformed into an S-shape so that the intermediate hydraulic hose 50 does not hang down below the subframe 4 when the cargo box 10 is horizontal.

[0041] Therefore, in the vehicle having the tiltable cargo box 10 according to this embodiment, the intermediate hydraulic hose 50 can be prevented from hanging down below the subframe 4, whether the cargo box 10 is horizontal or at the maximum tilt. As a result, interference between the chassis components and the intermediate hydraulic hose 50 can be suppressed.

[0042] (Other embodiments) The present invention may be configured as follows with respect to the above embodiment.

[0043] That is, in the above embodiment, the loading vehicle is a garbage collection vehicle, but there is no particular limitation as long as the loading vehicle has a hydraulic actuator in which the cargo box is driven by high-pressure oil from a hydraulic source on the chassis side and is tiltable.

[0044] It should be noted that the above-described embodiments are essentially preferred examples, and are not intended to limit the scope of the present invention, its applications, or uses. [Explanation of symbols]

[0045] 1. Refuse collection vehicle (loading vehicle) 2 Chassis 3. Cab 4 Subframe 5 Tilt center axis 6 Tilting Cylinder 7 Tilt Link 8 Hydraulic piping 9. Refuse loading device 10 packing boxes 11. Dustbin 12 Garbage disposal box 13 Rotating shaft 14 Garbage inlet 15 Packing box frame 30 Subframe side hydraulic piping 31 No. 1 metal piping 31a Termination section 40 Cargo box side hydraulic piping 41 Second metal piping 41a Starting end 50 Intermediate hydraulic hose 50a Flexible part 50b First connection end 50c Second connection end 60 Hydraulic Pump 61 Engine 62 Power take-off device 63 Main Control Valve 64 Rotating Cylinder 65 Push-in Cylinder 66 Hydraulic Motor 67 Cargo box side control valve 68 Hydraulic Oil Tank O axis center

Claims

1. A subframe provided on the chassis; A cargo box tiltably mounted on the subframe via a tilt cylinder; A hydraulic actuator provided on the container; a hydraulic source for supplying high-pressure oil to the hydraulic actuator; a hydraulic piping for circulating high-pressure oil between the hydraulic source and the hydraulic actuator, The cargo box is configured to be tiltable around a tilting central axis at the rear end of the cargo box frame of the cargo box between a horizontal state and a maximum tilted state, The hydraulic piping is as follows: A subframe-side hydraulic pipe that is provided on the chassis and the subframe and does not move in accordance with the tilting of the cargo box; A cargo box side hydraulic pipe provided on the cargo box and tilting together with the cargo box as the cargo box tilts; an intermediate hydraulic hose that connects a terminal end of a first metal pipe of the subframe side hydraulic piping to a starting end of a second metal pipe of the cargo box side hydraulic piping located rearward of the terminal end, and changes shape in accordance with the tilting of the cargo box; the intermediate hydraulic hose has a flexible portion, a first connection end portion made of metal provided at an end portion of the flexible portion on the side of the first metal pipe and connected to the terminal end portion of the first metal pipe, and a second connection end portion made of metal provided at an end portion of the flexible portion on the side of the second metal pipe and connected to the starting end portion of the second metal pipe, The maximum tilting line connecting the second connection end and the axis of the tilting central shaft at the maximum tilting of the packing box is: With respect to a reference line connecting the first connection end and the axis, It is on the opposite side of the horizontal tilt line connecting the second connection end and the axis when the packing box is in the horizontal position. A loading vehicle characterized by:

2. The end portion of the first metal pipe is inclined upward toward the rear.

2. The loading vehicle according to claim 1 .

3. The loading vehicle according to claim 2, characterized in that the starting end of the second metal piping is arranged so that, when the cargo box is horizontal, it is located lower than the ending end of the first metal piping and overlaps with the subframe when viewed from the side of the vehicle.

4. The second metal pipe extends downward toward the starting end of the second metal pipe, and then is bent so as to extend toward the front of the box.

4. A loading vehicle according to claim 1, wherein the loading vehicle is a loading vehicle.

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