Refuse collection vehicle

Abstract

To provide a garbage collection vehicle in which injected lubricating oil can be evenly distributed across the entire contact area between the power transmission mechanism and the rotating shaft. [Solution] The garbage collection vehicle is equipped with a rotating shaft 12 extending in the width direction of the vehicle and a power transmission mechanism that transmits the driving force of the drive unit to the rotating shaft 12. The power transmission mechanism is equipped with a driven sprocket 34 having an inner circumferential surface 34b that defines a fitting hole 34a into which the rotating shaft 12 is fitted. An internal spline 34c is formed on the inner circumferential surface 34b of the driven sprocket 34. The portion of the outer circumferential surface 12a of the rotating shaft 12 located inside the fitting hole 34a has a first outer circumferential surface 13a on which an external spline 13c that meshes with the internal spline 34c of the driven sprocket 34 is formed, and a second outer circumferential surface 14a on which the external spline 13c is not formed. The power transmission mechanism is provided with a first lubricating oil injection passage 51 for injecting lubricating oil into the second outer circumferential surface 14a.

Description

Technical Field

[0001] The present invention relates to a dust collection vehicle.

Background Art

[0002] Patent Document 1 discloses a dust collection vehicle including a dust storage box, a dust input box, and a loading device. The dust storage box has a space for storing dust. The dust input box is connected to the rear part of the dust storage box. The dust input box has a dust input port. The loading device moves the dust input from the input port to the dust storage box. The loading device includes a rotating plate that rotates around a rotating shaft as the hydraulic motor is driven, and a power transmission mechanism that connects the hydraulic motor and the rotating shaft to transmit the power of the hydraulic motor to the rotating shaft.

[0003] The power transmission mechanism includes, for example, a plurality of sprockets and a chain wound around the plurality of sprockets. The power transmission mechanism disclosed in Patent Document 1 includes a driving sprocket, a driven sprocket, an intermediate sprocket, a driven sprocket, a driving chain, and a driven chain. The driving sprocket is attached to the hydraulic motor. The driven sprocket is attached to a driven shaft supported by the right side wall of the dust input box. The intermediate sprocket is arranged side by side with the driven sprocket on the driven shaft. The driven sprocket is attached to one end of the rotating shaft. The driving chain is wound around the driving sprocket and the driven sprocket. The driven chain is wound around the intermediate sprocket and the driven sprocket.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in order to suppress wear on the power transmission mechanism and the rotating shaft, lubricating oil may be injected into the contact area between the power transmission mechanism and the rotating shaft. It is preferable that the refuse collection vehicle is configured so that the injected lubricating oil is evenly distributed over the entire contact area between the power transmission mechanism and the rotating shaft.

[0006] The present invention has been made in view of the foregoing, and its object is to provide a refuse collection vehicle in which injected lubricating oil can be uniformly distributed over the entire contact area between the power transmission mechanism and the rotating shaft. [Means for solving the problem]

[0007] The refuse collection vehicle according to the present invention comprises a chassis, a refuse container mounted on the chassis, a refuse input box connected to the rear of the refuse container and having an input opening that opens toward the rear, and a loading device that feeds the refuse placed in the refuse input box into the refuse container. The loading device comprises a rotating shaft having an outer peripheral surface that extends in the vehicle width direction from the outside to the inside of the refuse input box, a rotating plate provided inside the refuse input box and supported by the rotating shaft, a drive device that rotates the rotating shaft, and a power transmission mechanism connected to the drive device and the rotating shaft and transmitting the driving force of the drive device to the rotating shaft. The power transmission mechanism comprises a rotating body having an inner peripheral surface that partitions a fitting hole into which the rotating shaft is fitted. An internal spline is formed on the inner peripheral surface of the rotating body. The portion of the outer circumferential surface of the rotating shaft located inside the fitting hole has a first outer circumferential surface on which an outer spline that meshes with the inner spline of the rotating body is formed, and a second outer circumferential surface adjacent to the first outer circumferential surface in the axial direction of the rotating shaft, on which the outer spline is not formed. The power transmission mechanism is provided with a first lubrication oil injection passage for injecting lubricating oil into the second outer circumferential surface.

[0008] In the above-described refuse collection vehicle, lubricating oil injected into the first lubricating oil injection channel flows out to the second outer surface and then flows to the first outer surface, thereby supplying lubricating oil to the inner splines and outer splines. As the lubricating oil flows from the second outer surface to the first outer surface, the flow of lubricating oil is not obstructed by the teeth of the inner splines and the teeth of the outer splines, so the lubricating oil can be distributed uniformly to the inner splines and outer splines. Therefore, the injected lubricating oil can be distributed uniformly to the entire contact area between the power transmission mechanism and the rotating shaft.

[0009] The first lubricating oil injection passage may be formed to penetrate the interior of the rotating shaft. The first lubricating oil injection passage may connect the outer end face of the waste collection box on the rotating shaft to the second outer circumferential surface.

[0010] With this configuration, the first lubricating oil injection passage is formed inside the rotating shaft, allowing the first lubricating oil injection passage to be placed in a space-saving manner.

[0011] The rotating shaft may have a first shaft portion having the first outer circumferential surface and a second shaft portion having the second outer circumferential surface. The outer diameter of the second shaft portion may be smaller than the outer diameter of the first shaft portion.

[0012] In this configuration, a gap is formed between the inner circumferential surface of the fitting hole and the second outer circumferential surface. By accumulating lubricating oil in this gap, it is possible to prevent moisture from entering the fitting hole from the outside to the inside. This suppresses corrosion of the rotating shaft and rotating body.

[0013] The portion of the outer circumferential surface of the rotating shaft located inside the fitting hole may further have a third outer circumferential surface adjacent to the first outer circumferential surface in the axial direction of the rotating shaft, and on which the outer spline is not formed. The first outer circumferential surface may be positioned between the second outer circumferential surface and the third outer circumferential surface in the axial direction of the rotating shaft. The power transmission mechanism may be provided with a second lubrication oil injection passage for injecting lubricating oil into the third outer circumferential surface.

[0014] With this configuration, lubricating oil is supplied to the first outer surface from both sides in the vehicle width direction, making it easier for the lubricating oil to spread more uniformly to the parts where the rotating shaft and the power transmission mechanism come into contact.

[0015] The rotating shaft may have a first shaft portion having the first outer circumferential surface, a second shaft portion having the second outer circumferential surface, and a third shaft portion having the third outer circumferential surface. The outer diameter of the second shaft portion may be smaller than the outer diameter of the first shaft portion. The outer diameter of the third shaft portion may be smaller than the outer diameter of the first shaft portion.

[0016] In this configuration, a gap is formed between the inner circumferential surface of the fitting hole and the second outer circumferential surface, and a gap is formed between the inner circumferential surface of the fitting hole and the third outer circumferential surface. By accumulating lubricating oil in these gaps, it is possible to suppress the intrusion of moisture from the outside of the fitting hole to the inside of the fitting hole. This suppresses corrosion of the rotating shaft and rotating body.

[0017] The third outer surface may be positioned inward in the vehicle width direction from the first outer surface. The second lubricating oil injection passage may extend from a first position to a second position. The first position may be a predetermined position inward in the vehicle width direction from the first outer surface. The second position may be a position that does not overlap with the power transmission mechanism when viewed from the vehicle width direction.

[0018] With this configuration, the second lubricating oil injection passage is formed in a position that does not overlap with the power transmission mechanism, making it easy to inject lubricating oil into the second lubricating oil injection passage.

[0019] The rotating plate may have a main body that scoops up the waste placed in the waste collection box forward, a boss portion provided on the side of the main body that the rotating shaft fits into, and a cover attached to the boss portion that covers the entire inner end face of the rotating shaft on the waste collection box.

[0020] This configuration prevents moisture contained in the waste collected in the waste collection box from adhering to the rotating shaft. Therefore, corrosion of the rotating shaft can be suppressed.

[0021] A sealing material may be provided between the boss portion and the cover.

[0022] According to this configuration, it is possible to prevent moisture from entering between the boss portion and the cover, and to suppress corrosion of the rotating shaft.

Effect of the Invention

[0023] According to the present invention, it is possible to provide a dust collection vehicle in which the injected lubricating oil can easily spread uniformly over the entire contact portion between the power transmission mechanism and the rotating shaft.

Brief Description of the Drawings

[0024] [Figure 1] It is a side view of the dust collection vehicle. [Figure 2] It is a side cross-sectional view schematically showing the inside of the dust storage box and the inside of the dust input box. [Figure 3] It is a rear cross-sectional view schematically showing the inside of the dust input box according to an embodiment. [Figure 4] It is a schematic view of the rotating shaft when viewed from the rear. [Figure 5] It is a schematic view of the rotating shaft when viewed from the right. [Figure 6] It is an enlarged cross-sectional view of the vicinity of the rotating shaft in FIG. 3. [Figure 7] It is a view schematically showing the boss portion when viewed from the left. [Figure 8] It is a view schematically showing the power transmission mechanism when viewed from the right. [Figure 9] It is a diagram showing the operation cycle of the loading device [Figure 10] It is an enlarged cross-sectional view of the vicinity of the rotating shaft according to a reference example.

Mode for Carrying Out the Invention

[0025] In the following, one embodiment of the present invention will be described with reference to the drawings. Naturally, the embodiments described herein are not intended to particularly limit the present invention. Furthermore, components and parts that perform the same function will be appropriately denoted by the same reference numerals, and redundant descriptions will be omitted as appropriate.

[0026] Figure 1 is a side view of garbage truck 1. In the following description, unless otherwise specified, front, rear, left, right, top, and bottom refer to the front, rear, left, right, top, and bottom as seen from the perspective of the driver seated in the driver's seat (not shown) of garbage truck 1. The symbols F, Rr, L, R, U, and D in the drawing represent front, rear, left, right, top, and bottom, respectively. In the following description, the vehicle width direction refers to the left-right direction.

[0027] As shown in Figure 1, the refuse collection vehicle 1 comprises a chassis 2, a driver's cab 3, a refuse collection box 4, and a refuse input box 5. The driver's cab 3 and the refuse collection box 4 are mounted on the chassis 2. Inside the driver's cab 3 is a driver's seat (not shown). The refuse collection box 4 is located behind the driver's cab 3. The refuse input box 5 is connected to the rear of the refuse collection box 4.

[0028] Figure 2 is a schematic side cross-sectional view showing the interior of the refuse container 4 and the refuse input box 5. As shown in Figure 2, an opening 4a is formed at the rear of the refuse container 4. The interior of the refuse container 4 is in communication with the interior of the refuse input box 5 through the opening 4a. The refuse input box 5 is supported above the opening 4a by support pins 6. The refuse input box 5 has an input opening 7 that opens towards the rear. Refuse 100 is put into the interior of the refuse input box 5 through the input opening 7.

[0029] Figure 3 is a schematic rear cross-sectional view showing the inside of the refuse input box 5. As shown in Figure 3, the refuse input box 5 has a bottom wall 5a, a right side wall 5b, and a left side wall 5c. The bottom wall 5a constitutes the bottom surface of the refuse input box 5. As shown in Figure 2, the bottom wall 5a is formed in an arc shape. The refuse 100 introduced from the input port 7 is temporarily stored in the bottom wall 5a. As shown in Figure 3, the right side wall 5b extends upward from the right end of the bottom wall 5a. The left side wall 5c extends upward from the left end of the bottom wall 5a.

[0030] As shown in Figures 2 and 3, the refuse collection vehicle 1 is equipped with a loading device 10. The loading device 10 is a device that sends the refuse 100 that has been put into the refuse input box 5 to the refuse storage box 4. The loading device 10 comprises a rotating shaft 12, a rotating plate 20, a drive device 27, a power transmission mechanism 30, a push plate 40, and a push cylinder 42.

[0031] As shown in Figure 3, the rotating shaft 12 is provided so as to penetrate the right side wall 5b of the waste collection box 5. The rotating shaft 12 extends in the vehicle width direction from the outside to the inside of the waste collection box 5. The left end of the rotating shaft 12 is located inside the waste collection box 5. The right end of the rotating shaft 12 is located outside the waste collection box 5. The axial direction of the rotating shaft 12 coincides with the vehicle width direction. The right end of the rotating shaft 12 is supported by a support member 18 attached to the right side wall 5b of the waste collection box 5. Although not shown in the figure, a bearing may be provided between the rotating shaft 12 and the support member 18 to ensure smooth rotation of the rotating shaft 12.

[0032] Figure 4 is a schematic diagram of the rotation axis 12 as viewed from the rear. The rotation axis 12 has an outer circumferential surface 12a, a left end surface 12b, and a right end surface 12c. The outer circumferential surface 12a has a first outer circumferential surface 13a, a second outer circumferential surface 14a, a third outer circumferential surface 15a, and a fourth outer circumferential surface 16a. The first outer circumferential surface 13a is located between the second outer circumferential surface 14a and the third outer circumferential surface 15a in the axial direction of the rotation axis 12. The second outer circumferential surface 14a is located adjacent to the first outer circumferential surface 13a in the axial direction of the rotation axis 12. The second outer circumferential surface 14a is located further outward in the vehicle width direction than the first outer circumferential surface 13a. The third outer circumferential surface 15a is located adjacent to the first outer circumferential surface 13a in the axial direction of the rotation axis 12. The third outer circumferential surface 15a is located further inward in the vehicle width direction than the first outer circumferential surface 13a. Note that the outer side in the vehicle width direction refers to the side that is away from the vehicle centerline in the vehicle width direction, and the inner side in the vehicle width direction refers to the side that is closer to the vehicle centerline in the vehicle width direction. The fourth outer surface 16a is positioned inward in the vehicle width direction than the third outer surface 15a. That is, the fourth outer surface 16a, the third outer surface 15a, the first outer surface 13a, and the second outer surface 14a are positioned in this order from the inside to the outside in the vehicle width direction. In this embodiment, the first outer surface 13a is positioned between the second outer surface 14a and the third outer surface 15a in the left-right direction. The second outer surface 14a is positioned to the right of the first outer surface 13a. The third outer surface 15a is positioned to the left of the first outer surface 13a. The fourth outer surface 16a is positioned to the left of the third outer surface 15a.

[0033] Furthermore, the rotating shaft 12 has a first shaft portion 13, a second shaft portion 14, a third shaft portion 15, and a fourth shaft portion 16. The first shaft portion 13 has a first outer circumferential surface 13a. The second shaft portion 14 has a second outer circumferential surface 14a. The third shaft portion 15 has a third outer circumferential surface 15a. The fourth shaft portion 16 has a fourth outer circumferential surface 16a. In this embodiment, the first shaft portion 13 is positioned between the second shaft portion 14 and the third shaft portion 15 in the left-right direction. The second shaft portion 14 is positioned to the right of the first shaft portion 13. The third shaft portion 15 is positioned to the left of the first shaft portion 13. The fourth shaft portion 16 is positioned to the left of the third shaft portion 15. The outer diameter of the second shaft portion 14 is smaller than the outer diameter of the first shaft portion 13. The outer diameter of the third shaft portion 15 is smaller than the outer diameter of the first shaft portion 13. The outer diameter of the second shaft portion 14 is equal to the outer diameter of the third shaft portion 15. The outer diameter of the fourth shaft portion 16 is larger than the outer diameter of the first shaft portion 13. Note that the relative sizes of the outer diameters of the first shaft portion 13, the second shaft portion 14, the third shaft portion 15, and the fourth shaft portion 16 are not limited to the relative sizes of the first shaft portion 13, the second shaft portion 14, the third shaft portion 15, and the fourth shaft portion 16.

[0034] Figure 5 is a schematic diagram of the rotation axis 12 as viewed from the right. As shown in Figure 5, an external spline 13c is formed on the first outer peripheral surface 13a. The second outer peripheral surface 14a and the third outer peripheral surface 15a do not have an external spline 13c formed on them. The number of teeth of the external spline 13c is not particularly limited. In this embodiment, the number of teeth of the external spline is 14. Furthermore, the shape of the teeth of the external spline 13c is not particularly limited, and conventionally known tooth profiles such as involute tooth profiles can be used without any particular restriction.

[0035] As shown in Figure 3, the rotating plate 20 is installed inside the waste collection box 5. The rotating plate 20 has a main body portion 21 and a boss portion 22. The main body portion 21 is the part that scoops up the waste 100 that has been put into the waste collection box 5 forward. The main body portion 21 extends in the vehicle width direction. The boss portion 22 is provided on the side of the main body portion 21. In this embodiment, the boss portion 22 is provided on the right side of the main body portion 21.

[0036] Figure 6 is an enlarged cross-sectional view of the area around the rotating shaft 12 in Figure 3. As shown in Figure 6, the rotating shaft 12 is fitted into the boss portion 22. More specifically, the fourth shaft portion 16 of the rotating shaft 12 is fitted into the boss portion 22. By fitting the rotating shaft 12 into the boss portion 22, the rotating plate 20 is supported by the rotating shaft 12.

[0037] Figure 7 is a schematic diagram showing the boss portion 22 as viewed from the left. As shown in Figures 6 and 7, the rotating plate 20 has a cover 23. The cover 23 is attached to the boss portion 22. The method of attaching the cover 23 to the boss portion 22 is not particularly limited. The cover 23 may be attached to the boss portion 22 using screws, for example. As shown in Figure 7, the cover 23 covers the entire inner end face of the waste collection box 5 on the rotating shaft 12. In this embodiment, the cover 23 covers the entire left end face 12b of the rotating shaft 12. As shown in Figure 6, a sealing material 25 is provided between the boss portion 22 and the cover 23. The type of sealing material 25 is not particularly limited.

[0038] As shown in Figure 3, the drive unit 27 is located inside the waste collection box 5. The drive unit 27 is the power source that rotates the rotating shaft 12. The drive unit 27 is connected to the power transmission mechanism 30. The drive unit 27 rotates the rotating shaft 12 via the power transmission mechanism 30. The type of drive unit 27 is not particularly limited. The drive unit 27 may be, for example, a hydraulic motor.

[0039] Figure 8 is a schematic diagram showing the power transmission mechanism 30 as viewed from the right. As shown in Figure 3, the power transmission mechanism 30 is connected to the drive unit 27 and the rotating shaft 12. The power transmission mechanism 30 transmits the driving force of the drive unit 27 to the rotating shaft 12. The power transmission mechanism 30 acts as a reduction gear. The power transmission mechanism 30 comprises a driving sprocket 31, a driven sprocket 32, an intermediate sprocket 33, a driven sprocket 34, a drive chain 35, a driven chain 36, and a driven shaft 37.

[0040] As shown in Figure 3, the driving sprocket 31 is attached to the drive unit 27. The driven sprocket 32 ​​is attached to the driven shaft 37. The left end of the driven shaft 37 is supported by the right side wall 5b of the waste collection box 5. The right end of the driven shaft 37 is supported by the support member 18. The driven sprocket 32 ​​is positioned lower than the driving sprocket 31. The number of teeth on the driven sprocket 32 ​​is greater than the number of teeth on the driving sprocket 31. The drive chain 35 is wrapped around the driving sprocket 31 and the driven sprocket 32. The drive chain 35 is, for example, a roller chain.

[0041] The intermediate sprocket 33 is positioned on the driven shaft 37 alongside the driven sprocket 32, and is located to the right of the driven sprocket 32. The driven sprocket 34 is positioned below the intermediate sprocket 33. The rotating shaft 12 is fitted into the driven sprocket 34. The driven sprocket 34 in this embodiment is an example of a rotating body into which the rotating shaft 12 is fitted. The number of teeth on the driven sprocket 34 is greater than the number of teeth on the intermediate sprocket 33. The driven chain 36 is wrapped around the intermediate sprocket 33 and the driven sprocket 34. The driven chain 36 is, for example, a roller chain.

[0042] As shown in Figure 6, the driven sprocket 34 has an inner circumferential surface 34b that defines the fitting hole 34a into which the rotating shaft 12 is fitted. When the rotating shaft 12 is fitted into the fitting hole 34a, the first shaft portion 13, the second shaft portion 14, and the third shaft portion 15 of the rotating shaft 12 are located inside the fitting hole 34a. That is, the portion of the outer circumferential surface 12a of the rotating shaft 12 that is located inside the fitting hole 34a has a first outer circumferential surface 13a, a second outer circumferential surface 14a, and a third outer circumferential surface 15a. An inner spline 34c is formed on the inner circumferential surface 34b of the driven sprocket 34. The inner spline 34c is formed to mesh with the outer spline 13c. As the rotating shaft 12 and the driven sprocket 34 rotate while the inner spline 34c and the outer spline 13c mesh, the driving force of the drive device 27 is effectively transmitted to the rotating shaft 12. On the other hand, the second outer surface 14a is not in contact with the inner surface 34b of the driven sprocket 34. Therefore, a gap is formed between the second outer surface 14a and the driven sprocket 34. Similarly, the third outer surface 15a is not in contact with the inner surface 34b of the driven sprocket 34, so a gap is formed between the third outer surface 15a and the driven sprocket 34.

[0043] As shown in Figure 2, the pushing plate 40 is located inside the waste input box 5. The pushing plate 40 is positioned above the rotating plate 20. The pushing plate 40 is a component for pushing the waste 100, which has been scooped up by the rotating plate 20, into the waste storage box 4. The pushing plate 40 is a plate-shaped component that extends in the vertical direction. A pivot shaft 41, which extends in the vehicle width direction, is inserted through the pushing plate 40. The pushing plate 40 swings back and forth around the pivot shaft 41 between the forward position shown by the dashed line in Figure 2 and the rear position shown by the solid line in Figure 2. As the pushing plate 40 swings from rear to front, the waste 100 is pushed into the waste storage box 4.

[0044] The push cylinder 42 is a drive source that causes the push plate 40 to swing back and forth. The push cylinder 42 has a rod 42a. One end of the rod 42a is connected to the push plate 40. When the push plate 40 is in the forward position, the push cylinder 42 is extended. When the push plate 40 is in the rear position, the push cylinder 42 is retracted. The type of push cylinder 42 is not particularly limited. The push cylinder 42 may be, for example, a hydraulic cylinder.

[0045] The operation of the loading device 10 will be described below. First, the operation of the rotating shaft 12, the rotating plate 20, and the power transmission mechanism 30 will be described. When the drive unit 27 is driven, the driving sprocket 31 rotates and the drive chain 35 moves. When the drive chain 35 moves, the driven sprocket 32 ​​rotates. As the driven sprocket 32 ​​rotates, the driven shaft 37 rotates around its axis, and the intermediate sprocket 33 attached to the driven shaft 37 also rotates simultaneously. As the intermediate sprocket 33 rotates, the driven chain 36 moves. As the driven chain 36 moves, the driven sprocket 34 rotates together with the rotating shaft 12 around the axis of the rotating shaft 12. As the rotating shaft 12 rotates, the rotating plate 20 supported by the rotating shaft 12 also rotates around the axis of the rotating shaft 12.

[0046] Figure 9 is a diagram showing the operation cycle of the loading device 10. The operation of the loading device 10 is performed in cycles consisting of a retraction rotation process, a return process, a scraping rotation process, and a pushing process. The retraction rotation process is a process in which the rotating plate 20 is rotated from the rotation stop position when the pushing plate 40 is in the forward position so that the rotating plate 20 does not interfere with the movement of the pushing plate 40 as it swings from the forward position to the rear position. Here, the rotation stop position is the position in front of the rotation axis 12 where the main body 21 of the rotating plate 20 is approximately horizontal, as shown by the dashed line in Figure 2. The return process is a process for moving the pushing plate 40 from the forward position to the rear position. The scraping rotation process is a process in which the rotating plate 20 is rotated to the rotation stop position and scrapes up the waste 100 that has been put into the waste input box 5. The pushing process involves swinging the pushing plate 40 from a rear position to a front position, pushing the waste 100 on the rotating plate 20, which has stopped at the rotation stop position, into the waste collection box 4. Note that the return process and part of the scraping and rotating process may be performed simultaneously.

[0047] Incidentally, when the rotating shaft 12 and power transmission mechanism 30 are operated as described above, the rotating shaft 12 and power transmission mechanism 30 wear down. When the rotating shaft 12 and power transmission mechanism 30 are operating, the rotating shaft 12 and the driven sprocket 34 rotate while the outer spline 13c and the inner spline 34c mesh. Therefore, the outer spline 13c and the inner spline 34c are particularly susceptible to wear. To suppress wear on the outer spline 13c and the inner spline 34c, lubricating oil may be injected into the outer spline 13c and the inner spline 34c. Refuse collection vehicles may be equipped with lubricating oil injection passages for injecting lubricating oil into the outer spline and the inner spline.

[0048] Figure 10 is an enlarged cross-sectional view of the vicinity of the rotating shaft 12 according to a reference example. In the reference example shown in Figure 10, the lubricating oil injection passage 150 connects the outer end face of the waste collection box 5 on the rotating shaft 12 to the first outer peripheral surface 13a. That is, in the reference example shown in Figure 10, a lubricating oil inlet 150a is formed on the right end face 12c of the rotating shaft 12, and a lubricating oil outlet 150b is formed on the first outer peripheral surface 13a. Therefore, since the lubricating oil injection passage 150 is configured to allow lubricating oil to be injected into the first outer peripheral surface 13a, lubricating oil can be injected into the outer spline 13c and the inner spline 34c.

[0049] However, according to the inventor's findings, in the reference example lubrication passage 150 shown in Figure 10, the injected lubricating oil does not easily spread uniformly throughout the entire circumferential direction of the rotating shaft 12. The inventor believes the reason for this is as follows: In the reference example lubrication passage 150 shown in Figure 10, the outlet 150b of the lubrication passage 150 is provided between the teeth of adjacent external splines 13c. The teeth of the external splines 13c are formed aligned in the circumferential direction of the rotating shaft 12. Therefore, the lubricating oil that flows out from the outlet 150b of the lubricating passage 150 easily spreads along the teeth of the external splines 13c in the axial direction (vehicle width direction) of the rotating shaft 12. On the other hand, the flow of lubricating oil in the circumferential direction of the rotating shaft 12 is obstructed by the teeth of the external splines 13c, so the lubricating oil does not easily spread throughout the circumferential direction of the rotating shaft 12.

[0050] Therefore, as shown in Figure 6, the refuse collection vehicle 1 according to this embodiment is equipped with a first lubricating oil injection passage 51 for injecting lubricating oil into the second outer surface 14a and a second lubricating oil injection passage 52 for injecting lubricating oil into the third outer surface 15a.

[0051] The first lubricating oil injection passage 51 is provided in the power transmission mechanism 30. The first lubricating oil injection passage 51 is formed to penetrate the inside of the rotating shaft 12. The first lubricating oil injection passage 51 connects the outer end face of the waste collection box 5 on the rotating shaft 12 to the second outer circumferential surface 14a. That is, a lubricating oil inlet 51a is formed on the right end face 12c of the rotating shaft 12, and a lubricating oil outlet 51b is formed on the second outer circumferential surface 14a. Although not shown in the illustration, a grease nipple may be attached to the inlet 51a.

[0052] The second lubricating oil injection passage 52 is provided in the power transmission mechanism 30. The second lubricating oil injection passage 52 extends from a first position to a second position. A lubricating oil outlet 52b is formed at the first position. A lubricating oil inlet 52a is formed at the second position (see Figure 8). The first position is a predetermined position inward in the vehicle width direction from the first outer peripheral surface 13a. In this embodiment, the first position is a predetermined position on the inner circumferential surface of the cylindrical member 19 provided on the right side wall 5b of the waste collection box 5. The second position is a position that does not overlap with the power transmission mechanism 30 when viewed from the vehicle width direction. In this embodiment, as shown in Figure 8, the second position is rearward and below the driven sprocket 34. A grease nipple may be attached to the inlet 52a. The second lubricating oil injection passage 52 may be made of, for example, a copper pipe.

[0053] As described above, the refuse collection vehicle 1 of this embodiment includes a rotating shaft 12 and a power transmission mechanism 30. The power transmission mechanism 30 includes a driven sprocket 34 having an inner circumferential surface 34b that defines a fitting hole 34a into which the rotating shaft 12 is fitted. An internal spline 34c is formed on the inner circumferential surface 34b of the rotating body (driven sprocket 34). The portion of the outer circumferential surface 12a of the rotating shaft 12 located inside the fitting hole 34a has a first outer circumferential surface 13a on which an external spline 13c that meshes with the internal spline 34c is formed, and a second outer circumferential surface 14a on which the external spline 13c is not formed. The power transmission mechanism 30 is provided with a first lubricating oil injection passage 51 for injecting lubricating oil into the second outer circumferential surface 14a.

[0054] For example, when lubricating oil is injected from the inlet 51a, the lubricating oil flows through the first lubricating oil injection passage 51 and out to the second outer surface 14a from the outlet 51b. The second outer surface 14a does not have an outer spline 13c formed on it. Therefore, on the second outer surface 14a, the lubricating oil can easily spread uniformly in the circumferential direction of the rotating shaft 12 without being obstructed by the teeth of the outer spline 13c. As the lubricating oil that has spread uniformly on the second outer surface 14a flows toward the first outer surface 13a, the lubricating oil is supplied uniformly to the inner spline 34c and the outer spline 13c in the circumferential direction of the rotating shaft 12. Thus, according to the refuse collection vehicle 1 of this embodiment, the lubricating oil can easily spread uniformly to the part in contact with the rotating shaft 12 and the power transmission mechanism 30.

[0055] According to this embodiment, the first lubricating oil injection passage 51 is formed to penetrate the interior of the rotating shaft 12. The first lubricating oil injection passage 51 connects the right end face 12c of the rotating shaft 12 to the second outer peripheral surface 14a. As a result, the interior of the rotating shaft 12 can be used as a lubricating oil injection passage, and the first lubricating oil injection passage 51 can be placed in a space-saving manner.

[0056] According to this embodiment, the rotating shaft 12 has a first shaft portion 13 having a first outer circumferential surface 13a and a second shaft portion 14 having a second outer circumferential surface 14a. The outer diameter of the second shaft portion 14 is smaller than the outer diameter of the first shaft portion 13. As a result, a gap is formed between the second outer circumferential surface 14a and the inner circumferential surface 34b of the fitting hole 34a. Lubricating oil accumulates in this gap, preventing moisture from entering the inner spline 34c and outer spline 13c from the outside of the garbage collection vehicle 1, thereby suppressing corrosion of the rotating shaft 12 and the driven sprocket 34.

[0057] According to this embodiment, the portion of the outer circumferential surface 12a of the rotating shaft 12 located inside the fitting hole 34a further has a third outer circumferential surface 15a on which the outer spline 13c is not formed. The first outer circumferential surface 13a is positioned between the second outer circumferential surface 14a and the third outer circumferential surface 15a in the axial direction of the rotating shaft 12. The power transmission mechanism 30 is provided with a second lubricating oil injection passage 52 for injecting lubricating oil into the third outer circumferential surface 15a. This allows lubricating oil to be injected into the inner spline 34c and the outer spline 13c from both sides in the axial direction of the rotating shaft 12, thus making it easier for the lubricating oil to spread more uniformly.

[0058] According to this embodiment, the rotating shaft 12 has a first shaft portion 13 having a first outer circumferential surface 13a, a second shaft portion 14 having a second outer circumferential surface 14a, and a third shaft portion 15 having a third outer circumferential surface 15a. The outer diameter of the second shaft portion 14 is smaller than the outer diameter of the first shaft portion 13. The outer diameter of the third shaft portion 15 is smaller than the outer diameter of the first shaft portion 13. As a result, a gap is formed between the second outer circumferential surface 14a and the inner circumferential surface 34b of the fitting hole 34a. A gap is also formed between the third outer circumferential surface 15a and the inner circumferential surface 34b of the fitting hole 34a. Lubricating oil accumulates in these gaps, preventing moisture from entering the inner spline 34c and outer spline 13c from the outside of the garbage collection vehicle 1, thereby suppressing corrosion of the rotating shaft 12 and the driven sprocket 34.

[0059] According to this embodiment, the third outer peripheral surface 15a is positioned inward in the vehicle width direction compared to the first outer peripheral surface 13a. The second lubricating oil injection passage 52 extends from a first position to a second position. The first position is a predetermined position inward in the vehicle width direction compared to the first outer peripheral surface 13a. The second position is a position that does not overlap with the power transmission mechanism 30 when viewed from the vehicle width direction. As a result, the lubricating oil injection port 52a is positioned in a location that does not overlap with the power transmission mechanism 30 when viewed from the vehicle width direction, making it easier to inject lubricating oil into the second lubricating oil injection passage 52.

[0060] According to this embodiment, the rotating plate 20 has a main body portion 21 that scoops up the rubbish 100 placed in the rubbish input box 5 forward, a boss portion 22 provided on the side of the main body portion 21 into which the rotating shaft 12 is fitted, and a cover 23 attached to the boss portion 22 that covers the entire left end face 12b of the rotating shaft 12. As a result, moisture contained in the rubbish 100 placed in the rubbish input box 5 is less likely to adhere to the rotating shaft 12, thereby suppressing corrosion of the rotating shaft 12.

[0061] In this embodiment, a sealing material 25 is provided between the boss portion 22 and the cover 23. This improves the watertightness between the boss portion 22 and the cover 23, thereby further suppressing corrosion of the rotating shaft 12.

[0062] Although one embodiment of the present invention has been described above, the above embodiment is merely an example. The present invention can be implemented in many other embodiments.

[0063] In the above embodiment, the rotating shaft 12 and the power transmission mechanism 30 were located on the right side of the waste collection box 5. However, the rotating shaft 12 and the power transmission mechanism 30 may be located on the left side of the waste collection box 5. The rotating shaft 12 and the power transmission mechanism 30 may be arranged in pairs on both the left and right sides of the waste collection box 5.

[0064] External splines may be formed not only on the first outer surface 13a but also on the fourth outer surface 16a. In this case, internal splines that mesh with the external splines formed on the fourth outer surface 16a may be formed on the boss portion 22 of the rotating plate 20. The number of teeth of the external spline 13c formed on the first outer surface 13a and the number of teeth of the external spline formed on the fourth outer surface 16a may be the same or different. Furthermore, if external splines are formed on the fourth outer surface 16a, the refuse collection vehicle 1 may be provided with a lubricating oil injection passage for injecting lubricating oil into the fourth outer surface 16a.

[0065] Unless otherwise specified, the embodiments are not limiting to the present invention. Furthermore, the embodiments of the invention disclosed herein can be modified in various ways. Unless any particular problems arise, each component and each process mentioned herein can be omitted or combined as appropriate. [Explanation of Symbols]

[0066] 1. Garbage collection vehicle 2 chassis 4. Refuse container 5 Garbage disposal box 7 Inlet 10 Loading device 12 rotation axes 12a Outer surface 13. First shaft section 13a First outer surface 13c external spline 14. Second shaft section 14a Second outer surface 15 Third shaft section 15a Third outer surface 20 Rotating Plates 21 Main body 22 Boss Section 23 Cover 25 sealant 27 Drive unit 30 Power transmission mechanism 34 Driven sprocket (rotating body) 34a Fitting hole 34b Inner surface 34c internal spline 51 1st lubricating oil injection path 52 2nd lubricating oil injection path

Claims

1. The chassis and A refuse collection box mounted on the chassis, A refuse input box connected to the rear of the aforementioned refuse collection box, having an input opening that opens toward the rear, The system includes a loading device that sends the waste placed in the waste input box to the waste storage box, The aforementioned loading device is A rotating shaft having an outer surface extends from the outside to the inside of the aforementioned waste disposal box in the vehicle width direction, A rotating plate is provided inside the aforementioned waste collection box and is supported by the aforementioned rotating shaft, A drive device for rotating the aforementioned rotating shaft, The system comprises the aforementioned drive unit and a power transmission mechanism connected to the rotating shaft, which transmits the driving force of the drive unit to the rotating shaft, The power transmission mechanism comprises a rotating body having an inner circumferential surface that partitions a fitting hole into which the rotating shaft is fitted, An internal spline is formed on the inner circumferential surface of the rotating body. The portion of the outer circumferential surface of the rotating shaft located inside the fitting hole has a first outer circumferential surface on which an outer spline that meshes with the inner spline of the rotating body is formed, and a second outer circumferential surface adjacent to the first outer circumferential surface in the axial direction of the rotating shaft, on which the outer spline is not formed. A garbage collection vehicle, wherein the power transmission mechanism is provided with a first lubricating oil injection passage for injecting lubricating oil into the second outer surface.

2. The refuse collection vehicle according to claim 1, wherein the first lubricating oil injection passage is formed to penetrate the inside of the rotating shaft and connects the outer end face of the refuse collection box on the rotating shaft to the second outer circumferential surface.

3. The rotating shaft has a first shaft portion having the first outer surface and a second shaft portion having the second outer surface. The garbage collection vehicle according to claim 1, wherein the outer diameter of the second shaft portion is smaller than the outer diameter of the first shaft portion.

4. The portion of the outer circumferential surface of the rotating shaft located inside the fitting hole further has a third outer circumferential surface adjacent to the first outer circumferential surface in the axial direction of the rotating shaft, on which the outer spline is not formed. The first outer surface is positioned between the second outer surface and the third outer surface in the axial direction of the rotation axis, The refuse collection vehicle according to claim 1, wherein the power transmission mechanism is provided with a second lubricating oil injection passage for injecting lubricating oil into the third outer surface.

5. The rotating shaft has a first shaft portion having the first outer surface, a second shaft portion having the second outer surface, and a third shaft portion having the third outer surface. The outer diameter of the second shaft portion is smaller than the outer diameter of the first shaft portion. The garbage collection vehicle according to claim 4, wherein the outer diameter of the third shaft portion is smaller than the outer diameter of the first shaft portion.

6. The third outer surface is positioned inward in the vehicle width direction compared to the first outer surface. The second lubricating oil injection passage extends from the first position to the second position. The first position is a predetermined position located inward in the vehicle width direction from the first outer peripheral surface. The garbage collection vehicle according to claim 4, wherein the second position is a position that does not overlap with the power transmission mechanism when viewed from the vehicle width direction.

7. The aforementioned rotating plate is The main body is used to scoop up the waste placed in the aforementioned waste collection box forward, A boss portion is provided on the side of the main body portion, into which the rotating shaft is fitted, A refuse collection vehicle according to claim 1, comprising a cover attached to the boss portion and covering the entire inner end face of the refuse input box on the rotating shaft.

8. A garbage collection vehicle according to claim 7, wherein a sealing material is provided between the boss portion and the cover.

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