JP6353743B2 - Work vehicle - Google Patents

Description

The present invention also relates to a working vehicle both.

  Conventionally, various work vehicles having a watering function have been developed. As this type of work vehicle, for example, the one described in Patent Document 1 is known.

  The working vehicle of Patent Document 1 includes a watering tank that stores water, a cutting device that cuts an existing pavement such as asphalt pavement, a watering nozzle that injects water toward the cutting device, and a drainage port of the watering tank. The watering hose which connects a watering nozzle and the watering pump which is connected to the watering hose and sends the water in a watering tank to a watering nozzle are provided. The working vehicle of Patent Document 1 has a water spray function, so that the cutting device can be cooled, dust can be prevented from being scattered, and the like.

Japanese Patent Laid-Open No. 2002-194772

  In the working vehicle of Patent Document 1, when the water level in the watering tank is lowered during watering, a vortex is generated above the drainage port. When the vortex flow is generated, air is caught in the vortex flow and mixed into the watering pump, so that the watering pump is idled and the operation performance may be deteriorated.

The present invention has been made from this point of view, and to provide a working vehicle both capable of preventing the occurrence of vortex.

In order to solve such a problem, the present invention is a working vehicle provided with a watering tank, the watering tank including a drain port provided at a bottom portion and at least a part above the drain port. A eddy current preventing member that is positioned and prevents the generation of eddy currents and a bush that is attachable to and detachable from the drain port , wherein the eddy current preventing member is connected to the bush .

  According to the present invention, the watering tank is provided with the vortex preventing member that is at least partially positioned above the drain outlet, and therefore it is possible to prevent the generation of vortex.

According to the present invention , the eddy current prevention member is provided not only for a new work vehicle but also for an existing work vehicle because the eddy current prevention member is connected to the bush while being provided with a bush that can be attached to and detached from the drain outlet. The member can be easily attached.

  The width of the eddy current preventing member is preferably smaller than the inner diameter of the drain port.

  According to this configuration, the eddy current preventing member can be inserted and attached not only to a new work vehicle but also to an existing work vehicle from below the drainage port. Since the inside of the watering tank is a dark place and a narrow space, the work of attaching the eddy current preventing member from above the drain port becomes complicated. On the other hand, according to the present invention, the eddy current preventing member can be inserted and attached from the lower side of the drain outlet, so that the attaching operation is facilitated. Further, maintenance of the eddy current preventing member can be easily performed.

Moreover, in order to solve the said subject, this invention is a working vehicle provided with the watering tank, Comprising: The said watering tank has the drain outlet provided in the bottom part, and at least one part is above the said drain outlet. And an eddy current preventing member that prevents the generation of eddy currents, and the drain port includes a cylindrical socket, and the upper end of the socket is located above the inner surface of the bottom of the water spray tank. and it is located.

  When foreign matter (for example, dust, dust, etc.) in the watering tank is sent to the watering pump, there is a risk that the functioning or failure of the watering pump may occur. On the other hand, according to this invention, since the foreign material in a watering tank stays on the bottom inner surface, it can suppress that a foreign material is sent to a watering pump.

According to the working vehicle both of the present invention, it is possible to prevent the occurrence of vortex.

It is a side view which shows the road surface cutting vehicle which concerns on this embodiment. It is a top view which shows the road surface cutting vehicle which concerns on this embodiment. It is a partial expanded side view which shows the downward structure of a watering tank. It is a top view of a watering tank. It is sectional drawing along the IV-IV line of FIG. It is sectional drawing along the VV line of FIG. (A) is a partial expanded sectional view of a socket for watering, a bush, and a eddy current prevention member, (b) is a partial enlarged plan view of a socket for watering, a bush, and a eddy current prevention member. It is a partial expanded sectional view of the socket for drains. It is a front view of a sub tank. It is a partial expanded sectional view which shows the structure of an Example.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted. In this embodiment, the case where the water spray tank of this invention is mounted in the road surface cutting vehicle is illustrated. In addition, it demonstrates based on front and rear, right and left upper and lower sides in a figure.

  As shown in FIG. 1, the road surface cutting vehicle V includes a traveling machine body 1, a cutting device 2, a conveying device 3, and a watering device 4. The road surface cutting vehicle V is a vehicle that cuts an existing pavement R such as asphalt pavement with a predetermined thickness and transports the cut cutting waste.

<Running aircraft>
The traveling machine body 1 includes a body frame, a pair of left and right front wheels 11, a pair of left and right rear wheels 12, an engine, a driver's seat 13, and the like.

<Cutting device>
The cutting device 2 is installed between the front wheel 11 and the rear wheel 12 in the lower part of the traveling machine body 1, and is a device that cuts the existing pavement R with a predetermined thickness. The cutting device 2 includes a rotating drum 21 that extends horizontally and in the width direction, a plurality of bits 22 that are provided on the outer peripheral surface of the rotating drum 21 to cut the existing pavement R, and around the rotating drum 21 and the bit 22. The cutting frame 23 is covered.

  The rotary drum 21 can be rotated in the direction of the arrow in FIG. 1 by a drive motor (not shown). Thereby, the cutting waste cut by the bit 22 is sent out toward the rear end 3b of the conveying device 3. The rotary drum 21 is movable in the vertical direction and the horizontal direction with respect to the traveling machine body 1 by a hydraulic cylinder. Thereby, the height position and the width direction position of the bit 22 with respect to the existing pavement R can be adjusted, and the cutting depth and the cutting (transverse direction) position of the existing pavement R can be adjusted.

<Conveyor>
The conveyance device 3 is a device that conveys the cutting waste cut by the cutting device 2 to the outside of the existing pavement R, and is configured by a belt conveyor or the like, for example. As shown in FIG. 2, the transport device 3 is installed at the center in the width direction of the traveling machine body 1. As shown in FIG. 1, the transport device 3 can be folded backward. The conveying device 3 is folded backward at the time of forwarding and placed on the upper part of the traveling machine body 1 and unfolded forward at the time of work. The conveying device 3 at the time of deployment extends so as to become higher toward the front. The rear end 3b of the conveying device 3 is positioned in front of the cutting device 2 and serves as a carry-in end that receives cutting waste. A foreign matter avoidance 31 (see FIG. 3) for removing foreign matters on the existing pavement R is attached to the rear end 3b. The front end 3a of the transport device 3 is located above a loading platform of a dump truck (not shown), and serves as a carry-out end for delivering cutting waste to the dump truck.

<Watering device>
The watering device 4 is a device for watering the cutting device 2. As shown in FIGS. 1 and 3, the watering device 4 includes a watering tank 5, a watering hose 6, a watering filter 7, a watering pump 8, and a watering nozzle 9. In FIG. 3, for convenience of explanation, the watering hose 6, the watering filter 7, the watering pump 8 and the watering nozzle 9 are drawn with solid lines, and the other members are drawn with two-dot chain lines.

  As shown in FIG. 1, the water spray tank 5 is a metal hollow member (hollow container) that is installed on the upper front side of the traveling machine body 1 and stores water. In the form shown in FIG. 1, the water spray tank 5 constitutes a part of the vehicle body frame. As shown in FIG. 4, the water spray tank 5 is composed of a main tank 51 and a sub tank 52 having a smaller capacity than the main tank 51. One sub tank 52 is arranged on each of the left and right sides of the rear portion of the main tank 51.

The main tank 51 has a partition plate 51c, a water supply port 51d, a vent pipe 51e, an inspection opening 51f, a connection port 51g, a watering hole 51h, and a drain hole 51i.
As shown in FIG. 5, the main tank 51 is a substantially bowl-shaped tank having a recess 51b in the center of the bottom.

  As shown in FIGS. 5 and 6, the partition plate 51 c extends in the front-rear direction inside the main tank 51. The partition plates 51c are provided on the left and right sides with the recess 51b interposed therebetween, and partition the internal space of the main tank 51 into three. Thereby, while being able to suppress the deviation of the water at the time of right and left turn, the intensity | strength and rigidity of the main tank 51 can be improved. As shown in FIG. 6, the partition plate 51c is formed with a communication hole 51j that communicates the spaces with each other. The communication hole 51j has a circular shape in side view or a fan shape in side view. The circular communication hole 51j is formed above the recess 51b, and the larger the one located at the rear, the larger the diameter. The fan-shaped communication holes 51j are formed at the front and rear upper corners and the rear lower corner, respectively.

  As shown in FIGS. 5 and 6, the water supply port 51 d protrudes upward on the left and right sides of the upper portion of the main tank 51. The water supply port 51d has a cylindrical shape. The water supply port 51d is provided at a position near the rear of the main tank 51 and corresponding to the left and right spaces partitioned by the partition plate 51c. Although illustration is omitted, at the time of water supply, a hose is connected to the water supply port 51d to supply, for example, river water or tap water into the tank.

  As shown in FIG. 6, the vent pipe 51 e protrudes rearward from the rear outer peripheral surface of the water supply port 51 d. The ventilation pipe 51e has a cylindrical shape. The front end of the vent pipe 51e communicates with the water supply port 51d. The rear end of the vent pipe 51e is connected to the vent pipe 52d of the sub tank 52 through the hose 53.

  As shown in FIG. 4, the inspection opening 51 f penetrates in the vertical direction in the center of the upper portion of the main tank 51 and both the left and right sides. The inspection opening 51f has a rectangular shape in plan view. The central inspection opening 51f has a larger opening area than the inspection openings 51f on the left and right sides. The inspection opening 51f is closed by a lid member 51k. The lid member 51k is fixed to the upper edge of the inspection opening 51f with a bolt B. At the time of maintenance in the tank, the lid member 51k can be removed to perform maintenance work.

  As shown in FIG. 4, the connection port 51 g protrudes rearward on both the left and right sides of the rear portion of the main tank 51. The connection port 51g has a cylindrical shape. The connection port 51g is provided at a position corresponding to the left and right spaces partitioned by the partition plate 51c. As shown in FIG. 6, the connection port 51 g is located slightly above the vertical center of the main tank 51.

  As shown in FIG. 4, the watering hole 51 h penetrates in the vertical direction on the left side of the bottom 51 a of the main tank 51. The watering hole 51h has a circular shape in plan view. The watering hole 51h is provided near the rear of the main tank 51 and in the vicinity of the drain hole 51i.

Here, with reference to FIG. 7, the structure of the drain outlet of the water spray tank 5 is demonstrated in detail.
As shown in FIG. 7A, a cylindrical watering socket 51m is inserted into the watering hole 51h. In the present embodiment, the “drainage port” in the claims includes a watering hole 51h and a watering socket 51m. The watering socket 51m is made of metal and is fixed to the watering hole 51h by welding. The upper end 51m1 of the watering socket 51m is located above the bottom inner surface 51a1. Thereby, since the foreign material in a tank stays in the bottom part inner surface 51a1, it can suppress that a foreign material is sent to the watering pump 8. FIG. A female screw is formed on the inner peripheral surface of the watering socket 51m. The upper end 51m1 and the bottom inner surface 51a1 of the watering socket 51m may be flush with each other.

  A metal and cylindrical bush 51n is detachably inserted into the watering socket 51m. An enlarged flange 51o is formed at the lower end of the bush 51n. The outer diameter of the flange 51o is larger than the inner diameter of the watering socket 51m. On the outer peripheral surface of the bush 51n, a male screw that engages with the female screw of the watering socket 51m is formed at a portion other than the flange portion 51o. On the inner peripheral surface of the bush 51n, a first insertion hole 51p located on the lower side and a second insertion with a diameter larger than that of the first insertion hole 51p continuously from the upper end of the first insertion hole 51p. A hole 51q is formed. A connecting member C attached to the end of the watering hose 6 is inserted into the first insertion hole 51p. A female screw is formed on the inner peripheral surface of the first insertion hole 51p. On the outer peripheral surface of the connecting member C, a male screw that is screwed into the female screw of the first insertion hole 51p is formed.

  An eddy current preventing member 51r is inserted into the second insertion hole 51q. The eddy current preventing member 51r is a metal plate-like member made of, for example, stainless steel. The eddy current preventing member 51r has a narrow part 51s narrower than the inner diameter of the second insertion hole 51q, and a wide part 51t formed at the upper end of the narrow part 51s and wider than the inner diameter of the second insertion hole 51q. And have.

  The narrow portion 51s is a portion that is inserted into the second insertion hole 51q. The bottom surface of the narrow portion 51s is in a slightly floating state without contacting the bush 51n (the bottom surface of the second insertion hole 51q). The wide portion 51t is a portion that is exposed from the upper end of the second insertion hole 51q and protrudes upward from the upper end 51m1 of the watering socket 51m. Thereby, as shown by the arrow in FIG. 7 (b), the flow of water flowing while turning toward the watering socket 51m can be inhibited, so that it is possible to prevent the generation of vortex flow above the watering socket 51m. The width W of the wide part 51t (the maximum width W of the eddy current preventing member 51r) is smaller than the inner diameter D of the watering socket 51m. Thereby, the eddy current preventing member 51r can be inserted and attached from below the watering socket 51m. 7 (a) and 7 (b) indicate welded portions, and welding is performed at appropriate positions at the corners of the eddy current preventing member 51r and the bush 51n.

  As shown in FIG. 4, the drain hole 51 i penetrates in the vertical direction on both the left and right sides of the bottom 51 a of the main tank 51. The drain hole 51i has a circular shape in plan view. The drain hole 51 i is provided near the rear of the main tank 51. As shown in FIG. 8, a metal and cylindrical drain socket 51u is fixed to the lower edge of the drain hole 51i by welding. Although illustration is omitted, a hose, a valve, or the like is connected to the lower end of the drain socket 51u. During maintenance in the tank, water and foreign matter can be discharged through the drain hole 51i, the drain socket 51u, and the like by opening the valve.

  As shown in FIG. 9, the sub tank 52 has a recess 52a formed by recessing a part of the bottom upward. The recessed part 52a is formed in the site | part of the front side and outer side of a bottom part. The vertical wall 52b that forms the recess 52a is provided with a connection port 52c that protrudes sideways. The connection port 52c has a cylindrical shape. The connection port 52c is located below the center of the sub tank 52 in the vertical direction. As shown in FIG. 6, the connection port 52 c is connected to the connection port 51 g of the main tank 51 via the hose 54. Thereby, since the inside of the sub tank 52 and the inside of the main tank 51 communicate with each other, the water in the sub tank 52 can be automatically transferred into the main tank 51 when the water level in the main tank 51 falls.

  A first vent pipe 52d extends in the front-rear direction above the sub tank 52. The first vent pipe 52d has a cylindrical shape. The front end of the first vent pipe 52 d is connected to the vent pipe 51 e of the main tank 51 through the hose 53. The front end side of the first vent pipe 52d is supported by a support member 52f attached to the upper part of the sub tank 52. The rear end of the first vent pipe 52d communicates with the sub tank 52.

  As shown in FIGS. 4 and 6, a second vent pipe 52 e that protrudes sideways is provided on the rear end side of the first vent pipe 52 d. The second vent pipe 52e has a cylindrical shape. One end of the second vent pipe 52e communicates with the first vent pipe 52d. The other end of the second vent pipe 52e communicates with the outside of the tank. Accordingly, the inside and outside of the sub tank 52 can be communicated with each other by the second ventilation pipe 52e and the first ventilation pipe 52d, and the air permeability in the sub tank 52 can be ensured. Further, the inside and outside of the main tank 51 are communicated with each other by the second ventilation pipe 52e, the first ventilation pipe 52d, the hose 53, and the ventilation pipe 51e, and the air permeability in the main tank 51 can be ensured.

Next, with reference to FIG. 3, the watering hose 6, the watering filter 7, the watering pump 8, and the watering nozzle 9 arrange | positioned under the watering tank 5 are demonstrated in detail.
The watering filter 7, the watering pump 8, and the watering nozzle 9 are connected to the watering hose 6 in this order.

  The water spray filter 7 is a member that collects foreign matters. The water sprinkling filter 7 is spaced forward from the water sprinkling socket 51m. The water spray filter 7 is disposed in front of the lifting step S installed on the left side of the main tank 51.

  The watering pump 8 is a member that sends the water in the watering tank 5 to the watering nozzle 9, and a spiral pump is used in this embodiment. The watering pump 8 is spaced apart from the watering socket 51m. The watering pump 8 is attached to the rear part of the lifting step S. The watering pump 8 is electrically connected to the control unit F (see FIG. 1). The control unit F includes a monitor, an operation unit, a control board, and the like. The control part F is comprised so that the action | operation, stop, etc. of the watering pump 8 may be controlled.

  The watering nozzle 9 is a member that injects water toward the rotating drum 21 and the bit 22. A plurality of watering nozzles 9 are arranged along the width direction of the rotary drum 21 behind the cutting device 2 (only one is shown in FIG. 9).

  The watering hose 6 is a tubular member that connects the water outlet of the watering tank 5 and the watering nozzle 9 via the connecting member C. The watering hose 6 includes a first watering hose 61 from the connecting member C to the watering filter 7, a second watering hose 62 from the watering filter 7 to the watering pump 8, and a third watering hose from the watering pump 8 to the watering nozzle 9. 63.

  According to the present embodiment described above, since the eddy current preventing member 51r protruding upward from the upper end 51m1 of the watering socket 51m is provided, the generation of the eddy current can be prevented.

  Moreover, according to this embodiment, since the eddy current prevention member 51r is comprised with the metal plate, the countermeasure against generation | occurrence | production of an eddy current can be performed at low cost.

  Further, according to the present embodiment, the eddy current preventing member 51r is inserted into the bush 51n, and the bush 51n is detachably attached to the watering socket 51m. The eddy current preventing member 51r can be easily attached to the existing road surface cutting vehicle V.

  Moreover, according to this embodiment, since the width W of the eddy current preventing member 51r is smaller than the inner diameter D of the water spray socket 51m, the water spray is applied not only to the new road surface cutting vehicle V but also to the existing road surface cutting vehicle V. An eddy current preventing member 51r can be inserted and attached from below the socket 51m. Since the inside of the watering tank 5 is a dark place and includes a partition plate 51c and the like, and is a narrow space, the work of attaching the eddy current preventing member 51r from above the watering socket 51m becomes complicated. On the other hand, according to this embodiment, since the eddy current preventing member 51r can be inserted and attached from below the watering socket 51m, the attaching operation is facilitated. Further, maintenance of the eddy current preventing member 51r can be easily performed.

  Moreover, according to this embodiment, since the upper end 51m1 of the watering socket 51m is positioned above the bottom inner surface 51a1 of the watering tank 5, the foreign matter in the watering tank 5 remains on the bottom inner surface 51a1 and the foreign matter is sprinkled. It can suppress sending to the pump 8.

The embodiment of the present invention has been described above, but the present invention is not limited to this, and can be appropriately changed without departing from the gist of the present invention.
In this embodiment, although the water spray tank 5 was mounted in the road surface cutting vehicle V, you may mount in a rolling-compact vehicle, a water spray vehicle, etc., for example.
Moreover, although the water spray tank 5 illustrated the form which combines a water storage function and a vehicle body frame in this embodiment, this invention is applied with respect to the working vehicle in which the water spray tank 5 and the vehicle body frame are formed separately. You can also

  In the present embodiment, the eddy current preventing member 51r is formed of a metal plate, but the material, shape, and the like may be appropriately changed.

  In this embodiment, the eddy current preventing member 51r is inserted and attached from below the watering socket 51m. However, the eddy current preventing member 51r may be inserted and attached from above the watering socket 51m. In this case, the maximum width W of the eddy current preventing member 51r may be larger than the inner diameter D of the watering socket 51m.

  In this embodiment, the eddy current preventing member 51r is inserted into the watering socket 51m via the bush 51n. For example, the bush 51n is omitted and the eddy current preventing member 51r is directly fixed to the upper end 51m1 of the watering socket 51m. May be. Alternatively, the sprinkling socket 51m may be omitted, and the vortex preventing member 51r may be directly fixed to the bottom 51a.

  Next, the effects of the water spray tank 5 of the present invention will be described in more detail with reference to examples and comparative examples.

<Test method>
In this test, after water was stored from the bottom inner surface 51a1 of the watering tank 5 to a height of 250 mm, watering was performed. And the discharge amount of the watering nozzle 9 per one was measured immediately after the start of watering and every time the water level dropped by 50 mm. Moreover, the state of the water surface of the watering tank 5 was observed with the naked eye, and the presence or absence of generation | occurrence | production of a vortex, air biting, etc. was confirmed.

<Example 1>
As shown in FIG. 10, in Example 1, the eddy current preventing member 51r is inserted into the watering socket 51m, the plate thickness of the eddy current preventing member 51r is set to 6 mm, and the eddy current preventing member 51r from the upper end 51m1 of the watering socket 51m. The projecting length L of was made 50 mm.

<Example 2>
In Example 2, the same configuration as Example 1 was adopted except that the protrusion length L of the eddy current preventing member 51r was set to 100 mm.

<Example 3>
In Example 3, the same configuration as that of Example 1 was adopted except that the protrusion length L of the eddy current preventing member 51r was set to 150 mm.

<Comparative example>
In the comparative example, the eddy current preventing member 51r was not inserted into the watering socket 51m.

<Result>
The test results of Examples 1 to 3 and Comparative Example 1 are shown in Table 1.

<Examination of results>
In Examples 1 to 3, the discharge amount at each water level changed in the range of 2.1 to 2.2 L / min and was substantially constant. Moreover, the occurrence of air biting was not confirmed. Furthermore, the generation of dents and the generation or signs of vortices were confirmed, but it was also confirmed that these phenomena disappeared immediately.
In the comparative example, the discharge amount at a water level of 50 mm was 1.0 L / min, which was significantly reduced. In addition, the occurrence of air biting was confirmed when the water level dropped to 90 mm. Furthermore, the generation of large and small depressions was confirmed, and it was confirmed that the generation and disappearance of vortices were repeated frequently.

<Summary>
According to the test results, if the eddy current preventing member 51r is not inserted into the watering socket 51m, a dent or vortex is likely to occur, and air discharge is induced and the discharge amount becomes unstable. When the eddy current preventing member 51r is inserted into the dent, it becomes difficult to generate dents or vortices, or even if they are generated, they disappear immediately, and it is proved that the discharge amount is stabilized by preventing the occurrence of air biting. It was.
Further, it was demonstrated that the length of the protrusion length L of the eddy current preventing member 51r does not affect the test result.

V Road surface cutting vehicle (work vehicle)
2 Cutting device 4 Watering device 5 Watering tank 51 Main tank 51a Bottom 51a1 Bottom inner surface 51h Watering hole (drain)
51m Watering socket (drain)
51m1 Upper end 51n Bush 51r Eddy current prevention member 52 Sub tank 6 Sprinkling hose 7 Sprinkling filter 8 Sprinkling pump 9 Sprinkling nozzle W Width D Inner diameter

Claims (3)

A working vehicle with a watering tank,
The water tank is
A drain outlet provided at the bottom;
An eddy current preventing member that is at least partially located above the drain and prevents the generation of eddy currents;
A bush detachable from the drain port ,
The working vehicle , wherein the eddy current preventing member is connected to the bush . A working vehicle with a watering tank,
The water tank is
A drain outlet provided at the bottom;
An eddy current preventing member that is at least partially located above the drain outlet and prevents the generation of eddy currents,
The drain port is configured to include a cylindrical socket,
The upper end of the socket, work vehicles you characterized in that located above the inner bottom surface of the water spray tank.   The working vehicle according to claim 1 or 2, wherein a width of the eddy current preventing member is smaller than an inner diameter of the drain port.

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