JP7620499B2 - Rolling Machine - Google Patents

Description

The present invention relates to a rolling machine, and in particular to a rolling machine equipped with a fluid pump that supplies fluid to a rolling wheel.

Conventionally, there are known rolling machines in which a water sprinkler system or a liquid agent sprayer system is arranged in the space provided below the driver's seat. For example, the rolling machine described in Patent Document 1 has a machine room below the driver's seat that is open to the outside in the left-right direction and to the front in the front-rear direction of the machine body, and is configured with a liquid agent tank unit and a liquid agent pump unit arranged in the machine room.

JP 2020-159040 A

However, when a liquid pump unit is disposed in a machine room provided under the driver's seat, as in the case of the rolling machine described in Patent Document 1, the liquid pump constituting the liquid pump unit is exposed to dust during work or water during a car wash, which may lead to breakdowns. For this reason, in order to protect the liquid pump from external environments such as dust and water and to prevent breakdowns in the liquid pump, the liquid pump has traditionally been covered with a cover.

However, if the liquid pump is covered, heat generated by the operation of the liquid pump accumulates in the space enclosed by the cover, which can cause the liquid pump to become too hot, potentially resulting in failure or damage to the liquid pump.

The present invention was made in consideration of these problems, and its purpose is to provide a rolling machine that protects the fluid pump from external environments such as dust and water while improving the pump's heat dissipation performance.

In order to achieve the above object, the rolling machine of the present invention comprises a vehicle body, a driver's seat provided above the vehicle body, a storage chamber provided on the side of the vehicle body below the driver's seat and open to the outside in the vehicle width direction, a bracket attached to the storage chamber, a fluid pump disposed inside the storage chamber via the bracket, and a cover attached to the bracket and formed to cover the fluid pump from the outside in the vehicle width direction, the storage chamber has a ceiling portion that defines the upper and lower upper sides of the storage chamber, and a front The fluid pump is configured with a first wall portion that defines the inside of the storage chamber in the vehicle width direction, and a second wall portion that defines either the rear side or the front side of the storage chamber in the longitudinal direction, the fluid pump is surrounded by the bracket and the cover, the bracket includes a first bracket portion that faces the first wall portion and is disposed with a gap between it and the first wall portion, or that faces the second wall portion and is disposed with a gap between it and the second wall portion, and the first bracket portion has a first opening.

According to the rolling machine of the present invention, a cover is provided that is attached to the bracket and is formed to cover the fluid pump from the outside in the vehicle width direction. In this way, the fluid pump is covered by the cover from the outside in the vehicle width direction, i.e., the side that is open in the storage chamber. Therefore, the fluid pump can be protected from external environments such as dust during work and water during car washing, and thus failure and damage of the fluid pump can be avoided. In addition, the fluid pump is covered by the bracket and the cover and disposed inside the storage chamber. Therefore, it is possible to avoid a state in which the fluid pump is directly exposed to dust, water, etc. during work on the upper side, inside, rear side, or front side of the storage chamber. Furthermore, the bracket includes a first bracket portion that faces the first wall portion and is disposed with a gap between it and the first wall portion, or that faces the second wall portion and is disposed with a gap between it and the second wall portion, and the first bracket portion has a first opening. As a result, heat generated by the operation of the fluid pump can be discharged from the first opening to the outside of the space surrounded by the cover, which prevents the fluid pump from becoming too hot and prevents the fluid pump from breaking down or being damaged. In this way, a rolling machine can be provided that protects the fluid pump from the external environment, such as dust and water, while improving the pump's heat dissipation performance.

1 is a side view showing the overall configuration of a rolling machine according to an embodiment of the present invention. FIG. 2 is an enlarged side view of a portion of the rear body of the rolling machine of FIG. 1 with the cover removed. FIG. 3 is a perspective view of the rear fuselage shown in FIG. 2 . FIG. 3 is a front view of the rear fuselage shown in FIG. 2 . FIG. 2 is a perspective view showing a bracket used in the rolling machine according to the embodiment of the present invention. FIG. 6 is a perspective view of the bracket shown in FIG. 5 as seen from a different angle. FIG. 2 is an enlarged side view of a portion of the rear body of the rolling machine of FIG. 1 with a cover attached. FIG. 8 is a perspective view of the rear fuselage shown in FIG. 7 .

The following describes an embodiment of the present invention with reference to the drawings.

Figure 1 is a side view showing the overall configuration of a rolling machine 1 according to an embodiment of the present invention. Figure 2 is a side view showing an enlarged portion of the rear body 20 (car body) of the rolling machine 1 of Figure 1, with the cover 70 removed. Figure 3 is a perspective view of the rear body 20 shown in Figure 2. Figure 4 is a front view of the rear body 20 shown in Figure 2. Figure 5 is a perspective view showing a bracket 60 used in the rolling machine 1 according to an embodiment of the present invention. Figure 6 is a perspective view of the bracket 60 shown in Figure 5, viewed from a different angle. Figure 7 is a side view showing an enlarged portion of the rear body 20 of the rolling machine 1 of Figure 1, with the cover 70 attached. Figure 8 is a perspective view of the rear body 20 shown in Figure 7.

For ease of explanation, the forward, rear, left, and right directions are defined based on the traveling direction of the rolling machine 1 as seen by the driver seated in the driver's seat 24, and the up and down directions are defined based on gravity. That is, the arrows "forward" and "rear" shown in each figure indicate the forward and backward directions of the rolling machine 1, the arrows "left" and "right" indicate the left-right (vehicle width) direction of the rolling machine 1, and the arrows "up" and "down" indicate the up and down directions of the rolling machine 1. The "outer side in the left-right (vehicle width) direction" described later means a direction moving away from the rolling machine 1 in the left-right direction based on the fore-and-aft axis that extends in the fore-and-aft direction through the center of the rolling machine 1 in the vehicle width direction. The "inner side in the left-and-right (vehicle width) direction" means a direction moving closer to the fore-and-aft axis based on the fore-and-aft axis (i.e., a direction moving closer to the center frame 20f described later).

The rolling machine 1 is configured as an articulated vibrating roller. As shown in FIG. 1, the rolling machine 1 is configured from a front body 10 equipped with a front rolling wheel 12, and a rear body 20 equipped with a rear rolling wheel 22. The front body 10 and the rear body 20 are connected in an articulated manner that can bend horizontally via a center pin 14, and are configured to bend relative to each other to rotate the rolling machine 1. The front rolling wheel 12 is configured from a metal drum with a width corresponding to the left-right width (vehicle width) of the rolling machine 1. The rear rolling wheel 22 is configured from multiple rubber tires.

A driver's seat 24 is provided above the rear body 20. A control console 20b equipped with a steering wheel 20a is provided in front of the driver's seat 24, and a forward/reverse lever 20c is provided next to the control console 20b. An operator seated in the driver's seat 24 operates the steering wheel 20a and the forward/reverse lever 20c, and in response to this operation, the rolling machine 1 runs using an HST (Hydro Static Transmission) driven by an engine mounted inside the front body 10 as a power source. In other words, the rolling machine 1 runs by operating the operator, and compacts the ground 100 with the front rolling wheels 12 and the rear rolling wheels 22.

As shown in Figures 1 to 4, the rolling machine 1 is provided on the side of the rear body 20 below the driver's seat 24 and includes a machine room 28 (accommodation room) that is open to the outside in the vehicle width direction, a bracket 60 attached to the machine room 28, a liquid pump 50b (fluid pump) disposed inside the machine room 28 via the bracket 60, a cover 70 attached to the bracket 60 and formed to cover the liquid pump 50b from the outside in the vehicle width direction, and an access step 26 (step) provided on the side of the rear body 20 for getting on and off the driver's seat 24.

2 and 3, the boarding/alighting step 26 serves as a foothold for an operator to get on and off the driver's seat 24. The boarding/alighting step 26 is provided below the driver's seat 24, specifically, on the lower part of the right side of the rear fuselage 20. The boarding/alighting step 26 is located on the outer side (right side) of the machine room 28 in the vehicle width direction. Specifically, of the boarding/alighting steps 26, an outer step 26a and an inner step 26b (described later) are located on the outer side (right side) of the machine room 28 in the vehicle width direction. The boarding/alighting step 26 is also spaced a predetermined distance from the cover 70 (FIG. 8). Specifically, the boarding/alighting step 26 is disposed to the right of the cover 70, which prevents the toes of the operator from contacting the cover 70 when the operator gets on and off the driver's seat 24.

The boarding and disembarking steps 26 are composed of an outer step 26a, an inner step 26b, and a front step 26c. The outer step 26a is located to the right (outside in the vehicle width direction) of the inner step 26b. The outer step 26a and the inner step 26b are a pair of plate-shaped members extending parallel to each other in the front-rear direction while being spaced apart in the vehicle width direction. Both the outer step 26a and the inner step 26b are fixed to the rear body 20 at their rear ends by welding or the like. The outer step 26a is integrally formed at the front end of the outer step 26a with the front step 26c, which is a plate-shaped member extending diagonally forward and to the left. The inner step 26b is fixed to the front step 26c at the front end of the inner step 26b by welding or the like. The front step 26c is fixed to the rear body 20 at its left end.

1 to 3, the machine room 28 is defined on the right side of the rear body 20, and is a space formed below the floor plate 20d and above the boarding step 26. Specifically, the machine room 28 is composed of the floor plate 20d (ceiling portion) that defines the upper and lower upper sides of the machine room 28, the center frame 20f (first wall portion) that defines the inner side of the machine room 28 in the vehicle width direction, and the wheel house 20e (second wall portion) that defines the rear side of the machine room 28 in the front-rear direction. The floor plate 20d is a member on which an operator seated in the driver's seat 24 places his/her feet, and is disposed above the boarding step 26. The center frame 20f extends in the up-down direction and the front-rear direction, and is a member that forms the skeleton of the rear body 20 in the left-right direction. The wheel house 20e extends in the up-down direction and the left-right direction, and is a member that covers the front and the top of the rear rolling wheel 22. The wheel house 20e has a lower end (not shown) that extends in the left-right and front-rear directions from the lower end of the wheel house 20e. That is, the inner side of the machinery room 28 in the left-right direction is defined by the center frame 20f, the rear side is defined by the wheel house 20e, a part of the lower side is defined by the lower end, and the upper side is defined by the floor board 20d. The outer side of the machinery room 28 in the left-right direction, the front side in the front-rear direction, and a part of the lower side in the up-down direction are open and not covered.

As shown in Figures 2 and 3, the machine room 28 contains a tank unit 40 and a pump unit 50. The pump unit 50 draws in the liquid agent (anti-adhesion agent) stored in the tank unit 40 and sprays the liquid agent onto the rear rolling wheel 22, for example, via the spray nozzle 50a shown in Figure 1.

The tank unit 40 includes a tank 40a, a fixing belt 40b, and a cap 40c, and is disposed on the rear side of the machine room 28 in the front-rear direction. The tank 40a is a storage tank for storing the liquid agent, and a supply port (not shown) for supplying the liquid agent is formed on the upper side of the tank 40a in the vertical direction. The supply port is attached with a cap 40c that can be opened and closed. The cap 40c can be operated by an operator by opening a floor cover (not shown) provided on the floor plate 20d. The fixing belt 40b is a U-shaped member that opens on the rear side in the front-rear direction when viewed from above the machine body. The fixing belt 40b can be fixed to the tank support member in the front-rear direction while adjusting the degree of tightening by, for example, engaging one end on the left side with a tank support member (not shown) and aligning it along the tank 40a, and then tightening the other end with a bolt to the tank support member. The procedure for fixing the tank 40a to the tank support member using the fixing belt 40b is an example, and is not limited thereto. In this way, the tank unit 40 can be constructed as an integral unit by attaching the tank 40a to the tank support member using the fixing belt 40b. After the tank unit 40 is constructed as an integral unit by fixing the tank 40a to the tank support member using the fixing belt 40b as described above, it is attached to the rear side of the machine room 28 in the rear body 20 in the front-rear direction. Specifically, the tank unit 40 is arranged so that the tank support member is located above the lower end (not shown) extended from the lower end of the wheel house 20e, and is fixed to the lower end using, for example, a stud bolt and a nut. Therefore, the tank unit 40 is attached and fixed to the rear body 20 at the lower side in the vertical direction.

As shown in Figures 1 to 4, the pump unit 50 includes a spray nozzle 50a, a liquid pump 50b, a suction side hose 50c, a discharge side hose 50d, a nozzle side hose 50e, a liquid return hose 50f, a flow control valve 50g, a branching portion 50h, and a filter 50i. The pump unit 50 is disposed inside the machine chamber 28, forward of the tank unit 40 in the fore-and-aft direction.

The liquid agent pump 50b is an electric pump that sucks in the liquid agent from the tank 40a and sprays the liquid agent from the spray nozzle 50a when in operation, and is covered by a bracket 60 and a cover 70. The suction side hose 50c is connected at one end to the tank 40a and at the other end to the liquid agent pump 50b, and is a piping member that transports the liquid agent from the tank 40a to the liquid agent pump 50b. A filter 50i is inserted in the suction side hose 50c, making it possible to remove dust and other particles contained in the liquid agent.

The liquid pump 50b includes a fluid discharge port (not shown). The discharge side hose 50d is a member that conveys the liquid discharged from the liquid pump 50b to the outside, and is connected at one end to the branching portion 50h, and at the other end to the fluid discharge port (not shown) of the liquid pump 50b. The fluid discharge port of the liquid pump 50b is located below the first opening 60g formed in the inner bracket portion 60a (first bracket portion) described later when the liquid pump 50b is attached to the rear bracket portion 60b (second bracket portion) described later. In other words, the first opening 60g is located above the fluid discharge port of the liquid pump 50b when attached to the bracket 60. The discharge side hose 50d extends above the bracket 60 through the first opening 60g and a gap 80 described later. The branching portion 50h is a member that distributes the liquid supplied through the discharge side hose 50d to the nozzle side hose 50e and the liquid return hose 50f. The nozzle side hose 50e is connected to the branch 50h at one end and to the spray nozzle 50a at the other end, and is a piping member that conveys the liquid discharged from the liquid pump 50b to the spray nozzle 50a. The liquid return hose 50f is connected to the branch 50h at one end and to the tank 40a above the suction side hose 50c at the other end, and is a piping member that conveys the liquid discharged from the liquid pump 50b to the tank 40a. A flow rate control valve 50g is interposed in the liquid return hose 50f, and the amount of the liquid conveyed to the tank 40a is adjusted by adjusting the opening degree of this flow rate control valve 50g. For example, when the amount of the liquid returned to the tank 40a increases by opening the flow rate control valve 50g, the amount of the liquid supplied to the spray nozzle 50a via the nozzle side hose 50e decreases. On the other hand, when the amount of liquid returned to the tank 40a is reduced by throttling the flow rate control valve 50g, the amount of liquid supplied to the spray nozzle 50a via the nozzle side hose 50e increases. In this way, the flow rate of the liquid sprayed from the spray nozzle 50a can be adjusted by adjusting the opening of the flow rate control valve 50g.

As shown in Figures 2 to 4, the bracket 60 is a member to which the liquid pump 50b is attached, and is a substantially box-shaped member that is open on the outer side in the left-right direction and on the front side in the front-rear direction. The bracket 60 is attached to the center frame 20f of the rear body 20 and disposed inside the machine room 28. In other words, the liquid pump 50b is attached to the rear body 20 via the bracket 60. The bracket 60 is disposed so as to be located on the right side of the center frame 20f, i.e., on the outer side in the left-right direction, and is fixed to the first base 62 and the second base 64 fixed to the center frame 20f using the first fastener 62a and the second fastener 64a, which are made of a bolt and a nut.

2 to 6, the bracket 60 includes an inner bracket portion 60a (first bracket portion) that faces the center frame 20f and is disposed with a gap 80 between the center frame 20f and the inner bracket portion 60a. The inner bracket portion 60a has a first opening 60g. The inner bracket portion 60a is provided as a covering surface that constitutes the bracket 60 facing the center frame 20f. In other words, the inner bracket portion 60a is disposed as a covering surface that covers the liquid pump 50b from the inside in the left-right direction. The inner bracket portion 60a also extends downward beyond the lower bracket portion 60d described later, and has a support portion 60m on the lower portion on which the filter 50i of the pump unit 50 is placed. The support portion 60m serves as a stopper to prevent the filter 50i from rotating when the filter 50i is removed.

The bracket 60 also includes a rear bracket portion 60b (second bracket portion) that is provided as a covering surface that constitutes the bracket 60, facing the wheel house 20e and forming a gap 81 between the wheel house 20e and the rear bracket portion 60b. In other words, the rear bracket portion 60b is disposed as a covering surface that covers the liquid pump 50b from the rear side in the front-rear direction. The rear bracket portion 60b is a plate-shaped member that extends from the rear end of the inner bracket portion 60a toward the outside in the left-right direction. When the bracket 60 is attached to the rear body 20, the gap 81 means a space formed between the rear bracket portion 60b and the tank 40a. The liquid pump 50b is attached to the rear bracket portion 60b. The rear bracket portion 60b has a rear cutout portion 60n (second opening) that is located below the first opening portion 60g. The rear cutout portion 60n is a through hole provided on the lower side and left side of the rear bracket portion 60b. A power line (not shown) for operating the liquid pump 50b is connected to the liquid pump 50b through the rear cutout 60n.

5 and 6, the bracket 60 further includes an upper bracket portion 60c, a lower bracket portion 60d (third bracket portion), an outer bracket portion 60e, and a front bracket portion 60f. Each bracket portion of the bracket 60 (inner bracket portion 60a, rear bracket portion 60b, upper bracket portion 60c, lower bracket portion 60d, outer bracket portion 60e, and front bracket portion 60f) is formed, for example, by pressing a single metal plate.

The upper bracket portion 60c is a plate-like member extending forward from the upper end of the rear bracket portion 60b. The upper bracket portion 60c is arranged so as to cover the liquid pump 50b from above in the vertical direction when the cover 70 is attached. A fastening portion 60l is provided on the upper surface of the upper bracket portion 60c, and the branch portion 50h of the pump unit 50 is fixed to the fastening portion 60l using a fastener such as a bolt (FIG. 2). The lower bracket portion 60d is a plate-like member extending parallel or approximately parallel to the upper bracket portion 60c, and extends forward from the lower end of the rear bracket portion 60b. The lower bracket portion 60d has a lower cutout portion 60k on the right side and the front side. The lower bracket portion 60d is arranged so as to partially cover the liquid pump 50b from below in the vertical direction when the cover 70 is attached. In other words, when the cover 70 is attached to the bracket 60, the lower edge of the outer cover part 70a, the lower edge of the front cover part 70b, and the lower notch part 60k of the lower bracket part 60d form a lower through hole 60o (third opening). The suction side hose 50c of the pump unit 50 is connected to the liquid agent pump 50b through the lower through hole 60o.

The outer bracket portion 60e is a plate-like member extending forward from the right end of the rear bracket portion 60b. The outer bracket portion 60e extends parallel or approximately parallel to the inner bracket portion 60a, and is shorter in the front-rear direction than the inner bracket portion 60a. The front bracket portion 60f is a plate-like member extending upward from the front end of the lower bracket portion 60d. The front bracket portion 60f extends parallel or approximately parallel to the rear bracket portion 60b, and is shorter in the left-right direction and the up-down direction than the rear bracket portion 60b.

The upper bracket part 60c, the outer bracket part 60e, and the front bracket part 60f are respectively formed with an upper through hole 60h, a right side through hole 60i, and a front side through hole 60j. The cover 70 described later can be fixed to the bracket 60 by screwing an upper bolt 70h, a right side bolt 70i, and a front side bolt 70j described later into the upper through hole 60h, the right side through hole 60i, and the front side through hole 60j, respectively.

As shown in Figures 5 and 6, the bracket 60 has a first opening 60g formed facing the center frame 20f. Specifically, the first opening 60g is formed penetrating the inner bracket portion 60a in the left-right direction. Although the first opening 60g is shown as an oval shape that is long in the vertical direction, the shape of the first opening 60g is not limited to this, and may be, for example, a perfect circle, an ellipse, a polygon, or any other shape that allows the discharge side hose 50d to pass through.

7 and 8, the cover 70 is attached to the bracket 60 and is formed to cover the liquid pump 50b from the outside in the left-right direction and from the front in the front-rear direction. Specifically, the cover 70 is composed of an outer cover part 70a, a front cover part 70b, and an upper cover part 70c. With the cover 70 attached to the bracket 60, a right bolt 70i passes through the outer cover part 70a, a front bolt 70j passes through the front cover part 70b, and an upper bolt 70h passes through the upper cover part 70c. Each cover part of the cover 70 (the outer cover part 70a, the front cover part 70b, and the upper cover part 70c) is formed by pressing a single metal plate, etc.

The outer cover part 70a is a member that faces the inner bracket part 60a when the cover 70 is attached to the bracket 60, and is arranged to cover the liquid pump 50b from the right side. The front cover part 70b is a member that faces the rear bracket part 60b when the cover 70 is attached to the bracket 60, and is arranged to cover the liquid pump 50b from the front side. In addition, the upper cover part 70c is arranged to cover the liquid pump 50b from above when the cover 70 is attached to the bracket 60. As shown in Figures 7 and 8, there are no openings in the outer cover part 70a and the front cover part 70b. In other words, when the cover 70 is attached to the bracket 60, there are no openings in the outer cover portion 70a and the front cover portion 70b located on the open side (the outer side in the vehicle width direction and the front side in the longitudinal direction) of the machine room 28, so that the liquid pump 50b is completely covered from the outer side in the vehicle width direction and the front side in the longitudinal direction by the cover 70. Furthermore, when the cover 70 is attached to the bracket 60, there are no openings in the upper cover portion 70c and the upper bracket portion 60c located above the liquid pump 50b, so that the liquid pump 50b is completely covered from the upper side in the vertical direction by the cover 70 and the bracket 60.

Next, we will explain the operation and effects of the rolling machine 1 according to an embodiment of the present invention.

As shown in Figures 7 and 8, the rolling machine 1 according to this embodiment is provided with a cover 70 attached to the bracket 60 and formed to cover the liquid pump 50b from the outside in the vehicle width direction. In this way, the liquid pump is covered by the cover from the outside in the vehicle width direction, i.e., the side that is open in the storage chamber. This makes it possible to protect the liquid pump from external environments such as dust during work and water during car washing, and thus to prevent the liquid pump from malfunctioning or being damaged. In addition, the liquid pump 50b is covered on all sides by the bracket 60 and the cover 70 and is disposed inside the machine chamber 28. This makes it possible to prevent the liquid pump 50b from being directly exposed to dust, water, etc. during work on the upper side, inside, and rear side of the storage chamber.

Furthermore, the bracket 60 includes an inner bracket part 60a that faces the center frame 20f and is arranged to form a gap 80 between the center frame 20f, and the inner bracket part 60a has a first opening 60g. Therefore, heat generated by the operation of the liquid pump 50b can be discharged from the first opening 60g to the outside of the space surrounded by the cover 70, thereby preventing the liquid pump 50b from becoming too hot, and preventing the liquid pump 50b from breaking down or being damaged. In addition, the first opening 60g opens into the gap 80 formed between the inner bracket part 60a and the center frame 20f. In other words, the first opening 60g is arranged in a position where dust and the like during work are unlikely to enter. Therefore, it is possible to more reliably prevent the liquid pump 50b from being directly exposed to dust, water, and the like during work, and it is possible to discharge heat generated by the operation of the liquid pump 50b to the outside of the space surrounded by the bracket 60 and the cover 70. Furthermore, the first opening 60g is formed to be located above the inner bracket portion 60a that constitutes the side surface of the bracket 60. In other words, the first opening 60g is disposed in a position where the air that is warmed by the heat generated by the operation of the liquid pump 50b and rises can be easily discharged from the space surrounded by the bracket 60 and the cover 70. Therefore, compared to a case where an opening is provided only below the space surrounded by the bracket 60 and the cover 70, the heat generated by the operation of the liquid pump 50b can be more easily discharged to the outside of the space surrounded by the bracket 60 and the cover 70.

Furthermore, the lower through hole 60o is formed by the lower bracket part 60d which constitutes the lower surface of the bracket 60. The rear notch part 60n is formed below the rear bracket part 60b which constitutes the side surface of the bracket 60. In other words, the lower through hole 60o and the rear notch part 60n are arranged in a position where dust during work or water during car washing, which has entered the space surrounded by the bracket 60 and the cover 70, can be easily discharged without accumulating. In addition, all openings (the first opening 60g, the rear notch part 60n, and the lower through hole 60o) are arranged facing the center frame 20f, the wheel house 20e, or downward, and are arranged in a position where dust during work or water during car washing is difficult to enter. Therefore, it is possible to further suppress the state where the liquid agent pump 50b is directly exposed to dust or water during work.

In addition, the liquid pump 50b is disposed between the first opening 60g and the lower through hole 60o, or between the first opening 60g and the rear cutout 60n. In other words, the liquid pump 50b is disposed on the path of air flow caused by natural convection. Therefore, convection is more likely to occur than when only one opening is provided, and heat generated by the operation of the liquid pump 50b can be more easily discharged to the outside of the space surrounded by the bracket 60 and the cover 70.

In addition, according to the rolling machine 1 of this embodiment, the discharge side hose 50d of the liquid pump 50b extends from a fluid discharge port (not shown) located below the first opening 60g when the liquid pump 50b is attached to the rear bracket portion 60b, through the first opening 60g and the gap 80, and above the bracket 60. In this way, the discharge side hose 50d is arranged from the liquid pump 50b to the top of the bracket 60 via the shortest route, so that the length of the discharge side hose 50d can be shortened to achieve a simpler arrangement, and the liquid pump 50b and the cover 70 can be arranged compactly by moving closer to the center frame 20f. This improves the ease of assembling the discharge side hose 50d to the liquid pump 50b, and ensures space for the toes when the worker gets on and off the machine.

Here, if the discharge side hose 50d is extended downward from the liquid pump 50b and then extended upward from the underside of the inner bracket part 60a through the gap 80, the narrow gap 80 between the inner bracket part 60a and the center frame 20f may cause a bent part in the discharge side hose 50d, which may cause the liquid to stagnate. On the other hand, in order to eliminate the bent part in the discharge side hose 50d, the length of the discharge side hose 50d may be increased and the liquid pump 50b and the cover 70 may be disposed away from the center frame 20f. However, in this case, since the discharge side hose 50d becomes longer, it is expected that the workability of assembling the discharge side hose 50d to the liquid pump 50b may be deteriorated. Furthermore, since the liquid pump 50b and the cover 70 are moved outward in the left and right direction, it becomes difficult to secure the toe space when the operator gets on and off the vehicle.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the rolling machine 1 according to the above embodiment, but includes all aspects included in the concept of the present invention and the scope of the claims. In addition, each configuration may be appropriately and selectively combined to achieve the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment may be appropriately changed depending on the specific aspect of the present invention.

For example, in the above embodiment, the cover 70 is attached to the machine room 28 provided on the right side of the rear body 20. However, the cover 70 may be attached to a machine room (not shown) provided on the left side of the rear body 20. In this case, the machine room provided on the left side of the rear body 20 may house a water sprinkler pump for sprinkling water on the front rolling wheel 12 and the rear rolling wheel 22.

In the above embodiment, the first opening 60g is formed in the inner bracket portion 60a. However, the first opening 60g may be formed in the rear bracket portion 60b, facing the wheel house 20e, for example.

In the above embodiment, the rear side of the machinery room 28 is defined by the wheel house 20e. However, the front side of the machinery room 28 may be defined by a portion (second wall portion) of the rear fuselage 20 that extends from the center frame 20f outward in the vehicle width direction.

In the above embodiment, the inner bracket portion 60a as the first bracket portion is disposed facing the center frame 20f with a gap 80 formed between the inner bracket portion 60a and the center frame 20f. However, the first bracket portion may be disposed facing the wheel house 20e as the second wall portion or a portion of the rear body 20 with a gap 81 formed between the wheel house 20e or a portion of the rear body 20.

1 Rolling machine 20 Rear body (car body)
20d Floor board (ceiling part)
20e Wheel house (second wall portion)
20f: center frame (first wall portion)
24 Driver's seat 26 Entry and exit steps (steps)
28 Machine room (housing room)
50b Liquid pump (fluid pump)
50d Discharge side hose 60 Bracket 60a Inner bracket portion (first bracket portion)
60b Rear bracket portion (second bracket portion)
60d Lower bracket portion (third bracket portion)
60g: First opening 60n: Rear cutout (second opening)
60o Lower through hole (third opening)
70 Cover 80, 81 Gap

Claims (5)

The car body and
A driver's seat provided above the vehicle body;
A storage chamber provided on a side of the vehicle body below the driver's seat and open outward in a vehicle width direction;
A bracket attached to the chamber;
a fluid pump disposed within the housing chamber via the bracket; and
a cover attached to the bracket and formed to cover the fluid pump from an outer side in a vehicle width direction,
The storage chamber is configured by a ceiling portion that defines upper and lower sides of the storage chamber, a first wall portion that defines an inner side of the storage chamber in a vehicle width direction, and a second wall portion that defines either a rear side or a front side of the storage chamber in a front-rear direction,
the fluid pump is surrounded by the bracket and the cover,
the bracket includes a first bracket portion facing the first wall portion and disposed with a gap between it and the first wall portion, or facing the second wall portion and disposed with a gap between it and the second wall portion,
A rolling machine, characterized in that the first bracket portion has a first opening. the fluid pump includes a fluid discharge port, and a discharge-side hose is connected to the fluid discharge port to transport the fluid discharged from the fluid pump to an outside;
the first opening is located above the fluid discharge port of the fluid pump when the fluid pump is attached to the bracket,
2. The rolling machine according to claim 1, wherein the discharge hose extends above the bracket through the first opening and the gap. The first bracket portion is provided as a covering surface that constitutes the bracket and faces the first wall portion,
The bracket includes a second bracket portion provided as a covering surface constituting the bracket, the second bracket portion facing the second wall portion and forming a gap between the second wall portion and the second bracket portion,
3. The rolling machine according to claim 2, wherein the second bracket portion has a second opening located below the first opening. the bracket includes a third bracket portion disposed so as to cover a lower side of the fluid pump,
3. The rolling machine of claim 2, wherein the third bracket portion defines a third opening. a step provided on a side of the vehicle body for entering and exiting the driver's seat;
2. The rolling machine according to claim 1, wherein the step is located below the driver's seat and outboard of the accommodation chamber in the vehicle width direction, and is spaced a predetermined distance from the cover.

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