JP7214540B2 - vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vehicle in which a valve device can be easily attached and detached by a single worker outside the driver's cab.

In a vehicle equipped with a hydraulic power steering system, the steering wheel is connected to a valve device via a shaft, and the traveling device is steered by the hydraulic oil supplied and discharged by the valve device according to the rotation of the steering wheel by the driver. be done. It is preferable to dispose the valve device outside the driver's cab in order to prevent the inside of the driver's cab from becoming dirty with hydraulic oil during maintenance of the valve device and to make the operation noise of the valve device less audible to the driver.

For example, in the vehicle disclosed in Patent Document 1, a valve mounting plate 28 (flange) protruding from a tubular member 26 through which a lower shaft 17 is inserted is fastened to a column seat plate 14 (cabin wall portion) of a floor plate 8 with fastening bolts. 34 and a nut 36. Furthermore, in the vehicle disclosed in Patent Document 1, a bolt 29 inserted from the driver's compartment (above the floor plate 8) into a bolt insertion hole 28C penetrating vertically through the valve mounting plate 28 is attached to the steering valve 30 (valve device). A valve 30 is arranged outside the operator's cab (below the floor plate 8).

Japanese Patent No. 5809537

However, in the technique disclosed in Patent Document 1, for example, when the driver's cab is covered and the lower part of the floor plate 8 is isolated from the driver's cab, the steering valve 30 is removed from the valve mounting plate 28. When a worker outside the driver's cab supports the steering valve 30 to prevent it from falling off, another worker inside the driver's cab needs to remove the bolt 29, and the removal requires two people's work. staff were needed.

It is also possible to remove the steering valve 30 by a single worker outside the operator's cab. Mounting plate 28 and tubular member 26 had to be removed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle in which a valve device can be easily attached and detached by a single worker outside the driver's cab.

In order to achieve this object, the vehicle of the present invention comprises a vehicle body having a driver's cab in which a driver's seat is disposed, a traveling device disposed below the vehicle body, and a steering wheel disposed in the driver's cab. A wheel and a steering wheel supply and discharge working oil according to the rotation operation of the steering wheel to steer the traveling device, and a valve device arranged outside the driver's cab and connecting the valve device and the steering wheel. A shaft and a tubular body into which the shaft is inserted and protruding from a wall portion of the operator's cab to the outside of the operator's cab, the tubular body radially outward from an open end arranged outside the operator's cab. and a first flange to which the valve device is detachably fixed by a fastening member. Between the first flange and the wall, the fastening member can be operated from outside the cab. A gap is provided.

According to the vehicle of the present invention, the valve device is detachably fixed by the fastening member to the first flange projecting from the opening end portion outside the driver's cab of the tubular body projecting from the wall portion of the driver's cab to the outside of the driver's cab, Moreover, a gap is provided between the first flange and the wall portion that allows the fastening member to be operated from outside the cab. As a result, the valve device can be easily attached and detached by a single worker outside the operator's cab by manipulating the fastening member while supporting the valve device without removing the cylinder from the wall.

(a) is a side view of the transport vehicle in the first embodiment of the present invention, and (b) is a front view of the transport vehicle. FIG. 1B is an enlarged cross-sectional view of a main part of the transport vehicle taken along line II-II of FIG. 1B; FIG. 11 is an enlarged cross-sectional view of a main part of a transport vehicle according to a second embodiment;

Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. First, referring to FIG. 1, a transport vehicle 1 according to the first embodiment will be described. 1(a) is a side view of the transport vehicle 1, and FIG. 1(b) is a front view of the transport vehicle 1. FIG. In addition, in FIG.1(b), a part of wall of the operator's cab 4 is removed, and the inside of the operator's cab 4 is shown typically.

A transport vehicle 1 is a vehicle for transporting a transported object, and mainly includes a vehicle body 2 on which the transported object is placed, a traveling device 3 and a hydraulic power steering device 10 . The vehicle body 2 is provided with an operator's cab 4 and a machine room 7 .

A plurality of traveling devices 3 are arranged below the vehicle body 2 and are devices for causing the transport vehicle 1 to travel according to the operation of equipment in the driver's cab 4 . In this embodiment, the traveling devices 3 are arranged in two rows in the vehicle width direction of the transport vehicle 1, and six traveling devices are provided in each row. Since other configurations of the vehicle body 2 and the travel device 3 are known, detailed description thereof will be omitted.

The driver's cab 4 is provided in front of the vehicle body 2 and is a portion in which devices and the like operated by the driver for causing the transport vehicle 1 to travel are provided. The driver's cab 4 is formed by being surrounded by walls including a floor plate 4a and a front wall 4b rising from the front of the floor plate 4a. A driver's seat 6 in which a driver sits, and a steering wheel (steering wheel) 11 operated by the driver seated in the driver's seat 6 are arranged in the driver's cab 4 surrounded by the walls. The operator's cab 4 does not have to be completely surrounded by walls including the floor plate 4a and the front wall 4b, and a part of the walls other than the floor plate 4a may be omitted.

The machine room 7 is a space for housing a hydraulic pump for sending hydraulic oil to each part of the carrier 1, a tank for storing the hydraulic oil, an engine for driving the hydraulic pump (none of which is shown), and the like. and is provided below the operator's cab 4 across the floor plate 4a. An inspection door 9 is provided on each part of the vehicle body 2 in order to maintain the equipment in the machine room 7 , particularly to attach and detach a valve device 12 to be described later from outside the operator's cab 4 .

The power steering device 10 is a device that steers the traveling device 3 in accordance with the turning operation of the steering wheel 11 by the driver. Details of the power steering apparatus 10 will be described with reference to FIG.

FIG. 2 is an enlarged cross-sectional view of a main portion of the transport vehicle 1 taken along line II-II of FIG. 1(b). The power steering device 10 includes a steering wheel 11 (see FIG. 1B), a valve device 12, a first shaft 13, a second shaft 14, a universal joint 15, a steering column 16, and a cylinder 17. , and a support member 21 .

The valve device 12 is a device that has a plurality of mounting holes 12a that open on the side surface to which pipes connected to actuators, hydraulic pumps, and tanks for steering the travel device 3 are mounted, and that switches between communication and disconnection of these pipes. The valve device 12 is arranged outside the operator's cab 4 (inside the machine room 7) in order to prevent the inside of the operator's cab 4 from being contaminated with hydraulic oil during maintenance and to make it difficult for the driver to hear the operation sound of the valve device 12. It is

In the valve device 12, an input portion 12b to which the second shaft 14 is fitted and connected, and a plurality of internal threads 12c are formed on the surface of the cylindrical body 17 facing the first flange 18, which will be described later. ing. When rotation from the second shaft 14 is input to the input portion 12b, the valve device 12 steers the traveling device 3 by controlling the amount of supply and discharge of hydraulic oil according to the amount of rotation. A plurality of female threads 12c are arranged around the input portion 12b, and are portions into which male threads (fastening members) 18a for fixing the valve device 12 to the first flange 18 are respectively screwed.

The first shaft 13 is a rotating shaft of the steering wheel 11 and has one end connected to the steering wheel 11 . One end of the second shaft 14 is connected to the input portion 12b of the valve device 12 .

The universal joint 15 connects the ends of the first shaft 13 and the second shaft 14 at different angles, and rotates the second shaft 14 according to the rotation of the first shaft 13 . The movable part of the universal joint 15 is covered with a rubber cover 22, and the rubber cover 22 is filled with grease and sealed to prevent water, dust, etc. from entering the rubber cover 22.例文帳に追加

The steering column 16 is a cylindrical cover that covers the first shaft 13, and rotatably supports and fixes the first shaft 13 via a bearing 16a fitted on the inner peripheral surface. Since the steering column 16 is fixed by sandwiching the bearing 16a in the axial direction, two members divided in the axial direction are fixed to each other by a fastening member (not shown) or the like. Moreover, the bearing 16a is fixed to the first shaft 13 by sandwiching the bearing 16a in the axial direction with a C-ring (not shown) fitted in a groove on the outer peripheral surface of the first shaft 13 .

The cylindrical body 17 is a cover that covers the second shaft 14, and rotatably supports and fixes the second shaft 14 via two bearings 17a and 17b that are fitted to the inner peripheral surfaces of both ends in the axial direction. The bearings 17a and 17b are fixed to the cylindrical body 17 by steps provided on the inner peripheral surface of the cylindrical body 17 and the outer peripheral surface of the second shaft 14, and C-rings (not shown) fitted in grooves on the inner and outer peripheral surfaces thereof. and the second shaft 14 .

The cylindrical body 17 has its axial ends opened into the operator's cab 4 and the machine room 7 (outside the operator's cab) through the through holes 4c provided in the floor plate 4a. It protrudes out of the driver's cab 4 . A seal member 17c is fitted between the open end portion of the tubular body 17 disposed in the cab 4 and the second shaft 14 to prevent dust from adhering to the bearing 17a.

Further, the open end of the cylindrical body 17 in the cab 4 and the lower end of the steering column 16 are connected by a bellows cylindrical rubber dust boot 23 . The dust boot 23 prevents dust from adhering to the first shaft 13, the second shaft 14, the universal joint 15, and the bearings 16a and 17a.

The tubular body 17 has an annular first flange 18 that protrudes radially outward from an open end disposed in the machine chamber 7, and radially outwardly protrudes from an outer circumferential surface at substantially the center of the tubular body 17 in the axial direction. and an annular second flange 19 .

A plurality of insertion holes 18b are formed through the first flange 18 in the plate thickness direction (the axial direction of the cylindrical body 17). The insertion holes 18b are formed at respective positions corresponding to the plurality of internal threads 12c provided in the valve device 12 in a state where the second shaft 14 protruding from the cylindrical body 17 is connected to the valve device 12 . The valve device 12 is detachably fixed to the first flange 18 by screwing the male thread 18a inserted into the insertion hole 18b into the female thread 12c of the valve device 12 .

In this way, the valve device 12 can be fixed to the first flange 18 by utilizing the internal thread 12c provided on the commercially available valve device 12 itself, so that the commercially available valve device 12 can be improved, and the valve device 12 can be There is no need to interpose a separate member between the first flange 18 and the like. That is, the commercially available valve device 12 can be used as it is, and the replacement work of the valve device 12 can be facilitated.

The second flange 19 is detachably fixed to the floor plate 4a (upper surface of the floor plate 4a) in the cab 4 with screws 19a. Specifically, the second flange 19 is superimposed on the annular mounting seat 4d provided on the floor plate 4a along the periphery of the through hole 4c, and the screw 19a passing through the second flange 19 in the plate thickness direction is attached to the mounting seat 4d. ing. By attaching the second flange 19 to the floor plate 4a, the through hole 4c that communicates the inside of the operator's cab 4 and the inside of the machine room 7 is closed.

The support member 21 is a cover that supports the steering column 16 with respect to the floor plate 4a and prevents the driver's feet from hitting the cylinder 17 and the like. The support member 21 is fixed on the second flange 19 by screws 21a. The upper portion of the support member 21 is fixed to a spacer 21c fixed to the lower portion of the steering column 16 by a screw 21b. Such a support member 21 determines the angle of the steering column 16 with respect to the cylinder 17 fixed to the floor plate 4a, that is, the angle of the first shaft 13 with respect to the second shaft 14 .

Next, maintenance work of the power steering device 10 and the like will be described. The valve device 12 is detachably fixed to a first flange 18 of a cylindrical body 17 protruding from the floor plate 4a to the outside of the cab 4 by a male screw 18a. With the cylindrical body 17 fixed to the floor plate 4a, the male screw 18a can be tightened and loosened (attached and removed) from inside the machine room 7 (outside the operator's cab 4) between the first flange 18 and the floor plate 4a. gap is provided. As a result, a single worker outside the cab 4 can easily attach and detach the valve device 12 by tightening and loosening the male screw 18a while supporting the valve device 12 without removing the cylindrical body 17 from the floor plate 4a. .

A second flange 19 located axially apart from the first flange 18 is superimposed on the floor plate 4a in the cab 4, and the second flange 19 of the tubular body 17 is detachably fixed to the floor plate 4a. Maintenance and replacement of the cylindrical body 17 can be performed by attaching and detaching the cylindrical body 17 from inside the operator's cab 4. - 特許庁Furthermore, since the portion for fixing the cylindrical body 17 to the floor plate 4a can be removed from the gap between the first flange 18 and the floor plate 4a, it is possible to easily tighten and loosen the external thread 18a in the gap. The valve device 12 can be attached and detached more easily.

In addition, the support member 21 that supports the steering column 16 is fixed to the floor plate 4a and the like without interposing the second flange 19, and the second flange 19 of the cylindrical body 17 is attached to and detached from the lower surface of the floor plate 4a (machine room 7 side). It can be fixed if possible. However, in this case, when the cylinder 17 and the steering column 16 are removed from the floor plate 4a for maintenance or replacement of each part, the steering column 16 and the cylinder 17 are connected by the dust boot 23, or the first shaft 13 and the first shaft 13 are connected. It is necessary to release the connection by the universal joint 15 with the 2 shafts 14 .

On the other hand, in this embodiment, the second flange 19 of the cylinder 17 is detachably fixed to the floor plate 4a in the cab 4, so that the coupling between the steering column 16 side and the cylinder 17 side is released. The steering column 16 and the cylindrical body 17 can be removed from the floor plate 4a without removing. In particular, the support member 21 that supports the steering column 16 is fixed to the second flange 19, and the second flange 19 is fixed to the floor plate 4a. Of the device 10 , the unit for transmitting the rotation operation by the driver to the valve device 12 can be easily removed from inside the driver's cab 4 .

The insertion hole 18b and the male screw 18a inserted into the insertion hole 18b are arranged close to the outer peripheral edge of the first flange 18. As shown in FIG. As a result, when the valve device 12 is attached or detached, the first flange 18 can be prevented from interfering with the tightening/loosening operation of the male screw 18a by the worker, such as when the worker's hand or tool hits the first flange 18. It should be noted that this close arrangement means that there is no space for attaching another fastening member radially outward of the first flange 18 from the male thread 18a.

Next, a second embodiment will be described with reference to FIG. 1st Embodiment demonstrated the case where the valve apparatus 12 was fixed to the cylinder 17 by the external thread 18a screwed to the internal thread 12c of the valve apparatus 12. As shown in FIG. On the other hand, in the second embodiment, a case where the fastening flange 36 provided on the valve device 12 and the first flange 18 are fastened and fixed by the bolt 37 and the nut 38 will be described. The same reference numerals are given to the same parts as in the first embodiment, and the following description is omitted.

A portion of the machine room 7 is also provided in front of the front wall 4 b of the operator's cab 4 . A through hole 31 is formed in the front wall 4b to communicate the inside of the operator's cab 4 and the inside of the machine room 7 with each other. A cylindrical body 34 of a power steering device 32 is inserted through the through hole 31 . The steering column 16 is fixed to the operator's cab 4 by a supporting member (not shown).

The cylindrical body 34 is a cover that covers the second shaft 14 and supports and fixes the second shaft 14 rotatably. The cylindrical body 34 has a small diameter portion 34a to which the dust boot 23 is connected, a large diameter portion 34b having an outer diameter larger than that of the small diameter portion 34a, and an open end portion of the large diameter portion 34b disposed in the machine chamber 7. an annular first flange 18 extending radially outwardly from the .

The outer diameter of the small diameter portion 34 a is substantially the same as the inner diameter of the through hole 31 . The outer diameter of the large diameter portion 34 b is set larger than the inner diameter of the through hole 31 . Then, the small-diameter portion 34a is inserted into the through hole 31 from the machine chamber 7 side until the step 34c between the small-diameter portion 34a and the large-diameter portion 34b contacts the front wall 4b, and the cylinder 34 is joined to the front wall 4b by welding or the like. As a result, a part of the cylindrical body 34 protrudes from the front wall 4b to the outside of the operator's cab 4 (into the machine room 7).

A fastening flange 36 is formed in the valve device 12 of the power steering device 32 so that the facing surface facing the first flange 18 extends radially outward of the tubular body 34 . By screwing a nut 38 onto a bolt 37 passing through the overlapped portion of the fastening flange 36 and the first flange 18 in the plate thickness direction (the axial direction of the cylindrical body 34 ), the fastening flange 36 is attached to the first flange 18 . is detachably fixed.

As in the first embodiment, also in this embodiment, in a state where the tubular body 34 is fixed to the front wall 4b, there is a gap between the first flange 18 and the front wall 4b in the machine room 7 (outside the operator's cab 4). ) are provided to allow the bolt 37 and nut 38 (fastening member) to be tightened and loosened. Therefore, the valve device 12 can be easily attached and detached by one worker outside the cab 4 by tightening and loosening the bolt 37 and the nut 38 while supporting the valve device 12 . In particular, even if the cylindrical body 34 is non-detachable from the front wall 4b as in the present embodiment, the valve device 12 can be easily attached and detached by providing the first flange 18 on the cylindrical body 34 .

Further, since the valve device 12 is provided with the fastening flange 36 , the head of the bolt 37 can be positioned on the fastening flange 36 side and the nut 38 can be positioned on the first flange 18 side. While preventing rotation of the nut 38 with a tool or the like placed in the gap between the first flange 18 and the front wall 4b, the bolt 37 can be rotated in a space that is wider than the gap and can be easily taken. As a result, the attaching and detaching work of the valve device 12 can be made easier.

Even when the position of the head of the bolt 37 and the position of the nut 38 are exchanged, the rotation of the bolt 37 is prevented by a tool or the like placed in the gap between the first flange 18 and the front wall 4b, and the gap is maintained. The nut 38 can be rotated in a space that is wider and easier to take, and the attachment and detachment work of the valve device 12 can be made easier.

Although the present invention has been described above based on each embodiment, the present invention is by no means limited to the above-described embodiments, and various modifications and improvements are possible without departing from the scope of the present invention. It can be easily guessed.

In each of the above embodiments, the vehicles 1 and 30 are exemplified as the vehicles provided with the power steering devices 10 and 32 . However, the present invention is not necessarily limited to this, and the power steering devices 10 and 32 may be provided in other vehicles such as passenger cars, trucks, and various industrial vehicles for agriculture and industry.

In the first embodiment, the second flange 19 of the cylinder 17 is fixed to the floor plate 4a. In the second embodiment, the cylinder 34 is welded and fixed to the front wall 4b. . However, it is not necessarily limited to this, and the second flange 19 of the cylinder 17 of the first embodiment may be fixed to the front wall 4b, and the cylinder 34 of the second embodiment may be welded to the floor plate 4a. Also good.

Further, the valve device 12 having the fastening flange 36 may be fixed to the cylindrical body 17 of the first embodiment using the bolt 37 and the nut 38, and the cylindrical body 34 of the second embodiment is formed with the internal thread 12c. The assembled valve device 12 may be fixed using the male screw 18a. The fastening members for fixing the valve device 12 to the first flange 18 are not limited to the male screws 18a, the bolts 37 and the nuts 38, and other fastening members such as detachable rivets may be used.

In each of the above-described embodiments, the cases where parts of the cylinders 17 and 34 project from the floor plate 4a and the front wall 4b to the outside of the operator's cab 4 have been described. However, it is not necessarily limited to this. Substantially the entire cylinders 17 and 34 may protrude out of the operator's cab 4 from the floor plate 4a or the front wall 4b.

1,30 carrier (vehicle)
2 Vehicle body 3 Travel device 4 Driver's cab 4a Floor plate (part of wall)
4b front wall (part of wall)
6 driver's seat 10 power steering device 11 steering wheel 12 valve device 12c internal thread 13 first shaft (part of shaft)
14 second shaft (part of shaft)
15 universal joint (part of shaft)
17, 34 cylinder 18 first flange 18a male screw (fastening member)
18b insertion hole 19 second flange 37 bolt (part of fastening member)
38 nut (part of the fastening member)

Claims (4)

a vehicle body having a driver's cab in which a driver's seat is arranged;
a traveling device arranged below the vehicle body;
a steering wheel arranged in the driver's cab;
a valve device that supplies and discharges hydraulic oil in accordance with the rotation operation of the steering wheel to steer the traveling device and is disposed outside the driver's cab;
a shaft connecting the valve device and the steering wheel;
a cylindrical body through which the shaft is inserted and protruding from the wall of the cab to the outside of the cab,
The cylindrical body has a first flange projecting radially outward from an open end disposed outside the cab and to which the valve device is detachably fixed by a fastening member,
A vehicle, wherein a gap is provided between the first flange and the wall so that the fastening member can be operated from outside the driver's cab. 2. The vehicle according to claim 1, wherein said cylindrical body includes a second flange detachably fixed to said wall portion within said driver's cab. 3. The vehicle according to claim 1, wherein the fastening member is arranged close to an outer peripheral edge of the first flange. The valve device has a plurality of internal threads formed on a surface facing the first flange,
Insertion holes are formed in the first flange at respective positions corresponding to the plurality of internal threads,
The vehicle according to any one of claims 1 to 3, wherein the fastening member is an external thread that is inserted into the insertion hole and screwed into the internal thread.

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