Bearing structure of tire cleaning device

Abstract

To propose a bearing structure of a tire cleaning device which enables a component to be exchanged easily even if a slide portion is worn and is excellent in terms of costs.SOLUTION: In a bearing structure 14 of a tire cleaning device, a cleaning function plate 7 swings around a support shaft pin 15 supported by the bearing structure 14 in a seesaw manner. The bearing structure 14 includes: an inner bush 20 in which the support shaft pin 15 is fitted; an outer bush 30 assembled to the inner bush 20; and U shaped members 34 which are provided at both ends of a vehicle support rib 12 or on an extension line of the vehicle support rib 12 and each of which allows the outer bush 30 to be attached thereto or detached therefrom from an upper part. When the cleaning function plate 7 swings in the seesaw manner, an outer peripheral surface of the inner bush 20 and an inner peripheral surface of the outer bush 30 slide relative to each other.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a technology for a bearing structure used for a support pin of a cleaning function plate of a tire cleaning device. [Background technology]

[0002] Mud from construction sites often sticks to the tires of dump trucks and other vehicles that enter and leave the site. If the trucks leave the site and enter public roads, the mud falls and scatters, dirtying the road and requiring frequent road cleaning. After rainfall, the wet mud remains on the road in endless strips, damaging the scenery. Furthermore, after drying, it turns into dust and gets blown up, damaging the living environment of nearby residents and potentially developing into an environmental problem.

[0003] As a solution to the above problems, the applicant has received a patent for a "tire washing device" (Patent No. 5152596) which has a vehicle support rib and bearings provided inside the water tank, and a cleaning function plate having an arm with a pivot pin in the center, one end of which is a tire footrest and the other end of which is a ladle function section, which swings in a seesaw shape around the pivot pin supported by the bearing.

[0004] In the tire washing device of the above patented invention (hereinafter referred to as "this washing device"), when the vehicle passes through the water tank, the tire of the vehicle pushes down on the tire footing, causing the water stored in the ladle function part located on the opposite side of the fulcrum to be continuously sprayed onto the tire, thereby effectively washing the tire in conjunction with the up and down movement of the tire as it travels over steps in the water.

[0005] This washing device uses the vehicle's own kinetic energy, so it does not require power for the water spraying operation, and no workers are required to wash the tires. In addition, because there is no need to operate a switch to operate the machine, tires can be washed smoothly without stopping the vehicle or the driver getting off. Furthermore, because of its simple structure, it rarely breaks down and is easy to repair. In this way, this washing device has very excellent features. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5152596 Summary of the Invention [Problem to be solved by the invention]

[0007] In this cleaning device, the cleaning function plate swings in a seesaw shape around the support pin while the bearing is immersed in muddy water in the tank. If muddy water gets between the support pin and the bearing supporting it, the sliding surfaces of the support pin and the bearing may be worn down by the sand particles contained in the muddy water.

[0008] The pivot pin is welded to the arm that constitutes the cleaning function plate and is configured as one unit, so it is difficult to replace only the worn pivot pin.In addition, the bearing is also welded to the vehicle support rib and configured as one unit, so it is difficult to replace only the bearing.It would be ideal if only the pivot pin and only the bearing could be structured to be easily detached and replaced, but this is not a realistic solution in terms of strength and reliability.

[0009] On the other hand, it is possible to consider measures to suppress wear by installing oil seals (or dust seals) on the bearings to prevent muddy water from entering the sliding surfaces of the bearings. However, the loads and shocks that the bearings are subjected to are large, and the operating environment is harsh, so there are problems with the reliability and durability of oil seals. In addition, this cleaning device has many cleaning function plates and a large number of bearings. This requires many oil seals, which significantly increases the cost of the device as a whole. For these reasons, using oil seals is not a realistic solution.

[0010] Therefore, the applicant proposes, as an improvement to the present cleaning device, a new bearing structure for use in the present cleaning device, which allows easy and cost-effective replacement of parts even if the sliding parts wear out. [Means for solving the problem]

[0011] The bearing structure of a tire washing device according to the first invention has a vehicle support rib and a bearing structure provided in a water tub, and a cleaning function plate having an arm with a pivot pin in the center, one end of which is configured as a tire stepping portion, and the opposite end of the pivot pin is configured as a ladle function portion, and the cleaning function plate swings in a seesaw shape around the pivot pin supported by the bearing structure, the bearing structure comprising an inner bushing into which the pivot pin is inserted, an outer bushing combined with the inner bushing, and a U-shaped member provided at both ends of the vehicle support rib or on the extension direction thereof, which allows the outer bushing to be attached and detached in the vertical direction, and when the cleaning function plate swings in a seesaw shape, the outer peripheral surface of the inner bushing and the inner peripheral surface of the outer bushing slide against each other.

[0012] In the bearing structure of the tire washing device according to the first aspect of the present invention, the outer peripheral surface of the inner bushing and the inner peripheral surface of the outer bushing are adapted to wear, so that even if the bearing structure wears out, it is only necessary to replace the inner bushing and the outer bushing, which makes replacement easy and low cost.

[0013] The bearing structure of a tire cleaning device according to a second aspect of the present invention is characterized in that the pivot pin has a parallel groove machined into its outer peripheral surface, and the inner bushing is fitted onto the pivot pin and then punched into its outer peripheral surface to form a protrusion that protrudes from a part of its inner peripheral surface into the parallel groove, and the parallel groove and the protrusion mesh with each other to prevent the inner bushing from rotating relative to the pivot pin.

[0014] The bearing structure of the tire washing device according to the second aspect of the present invention is capable of preventing the inner bush from rotating relative to the pivot pin with a simple structure, and the inner bush can be easily removed from the pivot pin by moving the stamped protrusion in the axial direction along the parallel groove of the pivot pin.

[0015] The bearing structure for a tire cleaning device according to a third aspect of the present invention is characterized in that the U-shaped member has an extension portion extending upward on at least one side, a hole perpendicular to the U-groove of the U-shaped member is drilled in the extension portion, and a bolt is inserted into the hole to prevent the outer bushing from coming off in the upward direction.

[0016] In the bearing structure for a tire washing device according to the third aspect of the present invention, the outer bushing can be easily removed by removing the bolts. Effect of the Invention

[0017] According to the present invention, it is possible to provide a new bearing structure that can be used in the present cleaning device, in which parts can be easily replaced even if worn, and which is also cost-effective. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is an explanatory diagram of a situation in which tires of a dump truck are being washed using the washing device. [Diagram 2] FIG. 2 is a detailed view of the inside of A in FIG. 1, and is an explanatory view of how water in a water tank is splashed onto a tire. [Diagram 3] FIG. 3 is a view taken along the arrow B in FIG. 1, showing the cleaning device and the crossing plate device from above. [Figure 4] 4 is a detailed cross-sectional view taken along the line CC in FIG. 3, showing a state in which cleaning function plates are arranged. FIG. [Diagram 5] FIG. 2 is a detailed perspective view of the cleaning function plate alone. [Figure 6] FIG. 2 is a perspective detailed view of a vehicle support rib with which the cleaning function plate is combined. [Figure 7] 6 is a view taken along the arrow DD in FIG. 5, and is an explanatory diagram showing a state in which the support pin of the cleaning function plate is fitted into the inner bushing. FIG. [Figure 8] 7 is a view showing a state in which an outer bushing is fitted into a U-shaped groove of a U-shaped member shown in a view taken along an arrow E in FIG. 6. FIG. [Figure 9] FIG. 2 is a perspective view of a bearing structure of the present cleaning device. [Figure 10]10 is a detailed view of the bearing structure as seen from the arrow FF in FIG. 9 . FIG. [Figure 11] 11A to 11C are explanatory diagrams of a procedure for replacing the inner bushing and the outer bushing of the bearing structure of FIG. 10. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] 1 is an explanatory diagram of a situation in which the muddy tires 3 of a dump truck 2 are being washed using this washing device 1. This washing device 1 is installed on the ground 4 near the exit of a construction site, with gangway devices 5 installed in front and behind it. The muddy tires 3 can be washed simply by the dump truck 2 traveling over this washing device 1 from rear to front.

[0020] FIG. 2 is a detailed view of the interior of A in FIG. 1, and illustrates how, when the dump truck 2 passes through the water tank 6 of the cleaning device 1, the tire 3 pushes down the tire footing parts 13 of the cleaning function plate 7 one after another, causing the water 10 stored in the ladle function part 16 provided on the opposite side of the fulcrum to be splashed onto the tire 3.

[0021] Fig. 3 is a view taken along the arrow B in Fig. 1, showing the present washing device 1 and the crossing plate device 5 from above. The present washing device 1 is composed of a left washing device 1L and a right washing device 1R. Crossing plate devices 5 are installed in front and behind the left washing device 1L and the right washing device 1R, respectively. In the left washing device 1L and the right washing device 1R, multiple washing function plates 7 are arranged at equal intervals in the front-to-rear direction in each water tank 6.

[0022] Fig. 4 is a detailed cross-sectional view taken along the line CC in Fig. 3, showing the state in which the cleaning function plates 7 are arranged in the water tub 6. A plurality of vehicle support ribs 12 are arranged at equal intervals in the front-rear direction and fixed by welding on the upper surface of a long longitudinal member 11 that is detachably arranged in the water tub 6. The weight of the dump truck 2 when it passes through the cleaning device 1 is supported by the vehicle support ribs 12. At that time, the tire 3 steps on the tire stepping portion 13 of the cleaning function plate 7, causing the cleaning function plate 7 to swing in a seesaw shape around a support pin 15 pivoted to a bearing structure 14, and the ladle function portion 16 splashes water.

[0023] FIG. 5 is a detailed perspective view of the cleaning plate 7. The cleaning plate 7 is configured such that one end (front end) of an arm 17 having a pivot pin 15 in the center is the tire step 13, and the other end (rear end) of the arm 17 sandwiches the pivot pin 15 and is configured as a ladle function part 16. As shown in FIG. 5, the cleaning plate 7 has a pair of arms 17 arranged in parallel to the left and right, and a pair of pivot pins 15 in the center of the arms 17 are attached to the arms 17 facing each other on the same axis. The arm 17 is made of a thick steel plate or flat steel. The tire step 13 is made of a long member, and the front ends of the arms 17 are connected and fixed by welding. The tire step 13 is made of a round steel bar or reinforcing bar. The ladle function part 16 is made of a plate-like long member whose cross section cut in the front-rear and up-down directions is concave toward the top, and connects the rear ends of the arms 17. The ladle function portion 16 may be made by bending a steel plate, or may be manufactured by welding a plurality of steel plates together.

[0024] As shown in Fig. 5, the pivot pin 15 has a parallel groove 18 machined on its outer circumferential surface. The inner bushing 20 is a pipe material of approximately the same length as the pivot pin 15, and has an inner diameter that allows the pivot pin 15 to be fitted into it. A stainless steel pipe or the like is used for the inner bushing 20. After the inner bushing 20 is fitted onto the pivot pin 15, a punch 21 is applied to the outer circumferential surface of the inner bushing 20 to form a protruding portion in which a part of the inner circumferential surface of the inner bushing 20 protrudes into the parallel groove 18. The parallel groove 18 of the pivot pin 15 and the protruding portion from the inner circumferential surface of the inner bushing 20 mesh with each other, preventing the inner bushing 20 from rotating relative to the pivot pin 15.

[0025] 5, the outer bushing 30 is combined with the inner bushing 20. The outer bushing 30 is a pipe material of approximately the same length as the inner bushing 20, and has an inner diameter that allows the inner bushing 20 to be fitted therein. The outer bushing 30 is made of a stainless steel pipe or the like.

[0026] FIG. 6 is a detailed perspective view of the vehicle support rib 12 to be combined with the above-mentioned cleaning function plate 7 (see FIG. 5). For the vehicle support rib 12, an equal-leg angle iron (angle) can be used. With two base members 32 of a detachable length arranged in parallel in the water tub 6 (see FIG. 3), a plurality of vehicle support ribs 12 are arranged in parallel at equal intervals and welded. For the base members 32, an equal-leg angle iron (angle) is also used. The vehicle support rib 12 is oriented such that the apex of the angle faces upward. Also, a steel bar 33 is welded to the apex of the angle of the vehicle support rib 12 to prevent damage to the tires.

[0027] As shown in Fig. 6, a pair of U-shaped members 34 are welded to both left and right ends of the vehicle support rib 12. The U-shaped member 34 has a U-shaped groove 35 formed with a shape and dimensions that allow the outer bushing 30 (see Fig. 5) to be accommodated therein. The U-shaped member 34 also has at least one extension portion 36 that extends upward, and the extension portion 36 has a hole 37 formed therein.

[0028] 7 is a view taken along the arrow DD in FIG. 5 , and is a diagram illustrating a state in which the pivot pin 15 of the cleaning function plate 7 is fitted into the inner bushing 20. After the inner bushing 20 is fitted onto the pivot pin 15, a punch 21 is applied to the outer circumferential surface of the inner bushing 20, forming a protruding portion 22 in which a part of the inner circumferential surface of the inner bushing 20 protrudes into the parallel groove 18. The parallel groove 18 of the pivot pin 15 and the protruding portion 22 of the inner bushing 20 mesh with each other, preventing the inner bushing 20 from rotating relative to the pivot pin 15.

[0029] Fig. 8 is an explanatory diagram of the state when the outer bushing 30 is fitted into the U-groove 35 of the U-shaped member 34 in the view seen from the arrow E in Fig. 6. At this time, a bolt 40 is inserted into a hole 37 of the extension portion 36 and a nut 41 is fastened thereto, thereby preventing the outer bushing 30 from coming off the U-shaped member 34 upward.

[0030] Fig. 9 is a perspective view of the bearing structure 14 of the present cleaning device 1. The cleaning function plate 7, which has an arm 17 with a pivot pin 15 in the center, has one end (front end) which is the tire tread portion 13 and the other end (rear end) opposite the pivot point which is the ladle function portion 16, is configured to swing in a seesaw shape around the pivot pin 15 supported by the bearing structure 14. When the cleaning function plate 7 swings in a seesaw shape, the outer peripheral surface of the inner bush 20 (see Fig. 7) and the inner peripheral surface of the outer bush 30 (see Fig. 8) slide against each other.

[0031] For this reason, even if muddy water enters the bearing structure 14, only the outer peripheral surface of the inner bushing 20 and the inner peripheral surface of the outer bushing 30 are worn down. Therefore, when the outer peripheral surface of the inner bushing 20 and the inner peripheral surface of the outer bushing 30 become worn down, it is necessary to replace only the inner bushing 20 and the outer bushing 30. That is, since the outer peripheral surface of the pivot pin 15 of the cleaning function plate 7 or the inner peripheral surface of the U-shaped groove 35 of the U-shaped member 34 does not wear out, the pivot pin 15 and the U-shaped member 34 do not need to be replaced.

[0032] Fig. 10 is a detailed view seen from the arrow FF in Fig. 9, and is a detailed view of the bearing structure 14. The bearing structure 14 is composed of an inner bushing 20 into which the pivot pin 15 is fitted, an outer bushing 30 which is combined with the inner bushing 20, and a U-shaped member 34 which allows the outer bushing 30 to be detached from above.

[0033] FIG. 11 is an explanatory diagram of a procedure for replacing the inner bushing 20 and the outer bushing 30 of the bearing structure 14 of FIG. After removing the nut 41 from the bolt 40, the bolt 40 is pulled out from the hole 37 of the U-shaped member 34. Then, the cleaning function plate 7 can be removed above the U-shaped member 34 with the inner bushing 20 and the outer bushing 30 still fitted on the pivot pin 15. Then, the outer bushing 30 can be pulled out in the axial direction of the pivot pin 15, which is the direction away from the arm 17. Thereafter, the protrusion 22 of the inner bushing 20 can be slid along the parallel groove 18 of the pivot pin 15, whereby the inner bushing 20 can be pulled out in the axial direction of the pivot pin 15. In this manner, the worn inner bushing 20 and outer bushing 30 can be easily removed.

[0034] Installation of the new inner bushing 20 and outer bushing 30 into the bearing structure 14 can be accomplished by the following procedure. First, the new inner bush 20 is fitted onto the pivot pin 15 of the cleaning function plate 7. Then, the outer peripheral surface of the inner bush 20 is punched at the position of the parallel groove 18 of the pivot pin 15 to form a protruding portion 22 from the inner peripheral surface of the inner bush 20 to the parallel groove 18 of the pivot pin 15. This allows the new inner bush 20 to be prevented from rotating relative to the pivot pin 15. Furthermore, the new outer bush 30 is combined with the new inner bush 20. Then, the cleaning function plate 7 (FIG. 6) is combined with the vehicle support rib 12 (FIG. 7) by the bearing structure 14. After the bolt 40 is passed through the hole 37 of the U-shaped member 34, a nut 41 is fastened to the bolt 40. Then, with the new inner bush 20 and the new outer bush 30 fitted onto the pivot pin 15, the cleaning function plate 7 is prevented from coming off upward from the U-shaped member 34.

[0035] As described above, according to the bearing structure 14 of the tire washing device 1 of the present invention, even if the sliding parts of the bearing structure 14 are worn, it is only necessary to replace the inner bushing 20 and the outer bushing 30. Moreover, the replacement work is easy. Furthermore, since the inner bushing 20 and the outer bushing 30 are inexpensive, this bearing structure is excellent in terms of maintenance costs.

[0036] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Addition, omission, substitution, and other modifications of the configuration are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but is defined by the claims. [Explanation of symbols]

[0037] 1: Tire cleaning device 6: Aquarium 7: Washing function plate 12: Vehicle support rib 13: Tire tread area 14: Bearing structure 15: Support pin 16: Ladle function part 17: Arm 18: Parallel groove 20: Inner bushing 21: Punch stamp 22: Protrusion 30: Outer bushing 34: U-shaped member 36: Extension part 37: Hole 40: Bolt

Claims

1. In the bearing structure of a tire washing device, a vehicle support rib and a bearing structure are provided in a water tank, one end of an arm having a pivot pin in the center is configured as a tire stepping portion, and the other end of the pivot pin is configured as a ladle function portion, and the washing function plate swings in a seesaw shape around the pivot pin supported by the bearing structure, The bearing structure includes: an inner bushing into which the pivot pin is fitted; an outer bushing that is mated with the inner bushing; a U-shaped member provided at each end of the vehicle support rib or on an extension of the vehicle support rib, the U-shaped member being capable of attaching and detaching the outer bushing in the up-down direction; A bearing structure for a tire washing device, characterized in that, when the washing function plate oscillates in a seesaw manner, the outer peripheral surface of the inner bushing and the inner peripheral surface of the outer bushing slide against each other.

2. The support pin has a parallel groove machined on its outer circumferential surface, The inner bushing is fitted onto the pivot pin, and then an outer peripheral surface of the inner bushing is punched to form a protruding portion in which a part of an inner peripheral surface of the inner bushing protrudes into the parallel groove, 2. The bearing structure for a tire washing device according to claim 1, wherein the parallel groove and the protruding portion are engaged with each other to prevent the inner bush from rotating relative to the support pin.

3. 2. The bearing structure of a tire washing device according to claim 1, wherein the U-shaped member has an extension portion extending upward on at least one side, a hole perpendicular to the U-groove of the U-shaped member is drilled in the extension portion, and a bolt is inserted into the hole to prevent the outer bushing from coming off in the upward direction.

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