JP2021070439A - Road/track working vehicle - Google Patents

Abstract

To provide a road/track working vehicle capable of improving the stability performance of a vehicle in a track traveling mode.SOLUTION: A road/track working vehicle 1 is configured to switch to a road traveling mode in which front and rear iron wheels 12f and 12r are stowed in a vehicle body 2 so that it is possible to travel on a road with tire wheels 3, and a track traveling mode in which the front and rear iron wheels 12f and 12r are bulged onto the track so that it is possible to travel on the track with the iron wheels 12f and 12r. In the track traveling mode, at a center position in a vehicle fore-and-aft direction between the pair of left and right front side iron wheels 12f and the pair of left and right rear side iron wheels 12r, a swiveling center Y of a swiveling base 20 is disposed.SELECTED DRAWING: Figure 3

Description

The present invention relates to a road-rail work vehicle capable of traveling on a road and traveling on a track.

The road-rail work vehicle is configured based on a truck vehicle, has tire wheels for road driving and iron wheels for track driving, and has a road driving mode in which the iron wheels are stored so that the tire wheels can travel on the road. , It is possible to switch to the track traveling mode in which the iron wheel is projected onto the track and the iron wheel can travel on the track. This road-rail vehicle is equipped with a swivel that can be swiveled horizontally on the vehicle body, a boom that can be raised and lowered on the swivel, and a workbench for boarding workers provided at the tip of the boom. The worker on the table operates the operation device provided on the work table to operate the boom, so that the work table can be moved to an arbitrary high position and work at high places, for example, maintenance and inspection of the trolley wire. Work can be performed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-91491

In the road-rail vehicle described in the above patent document, the turning center of the turning table is arranged closer to the front of the vehicle body. As a result, when the road-rail vehicle enters the track running mode, the front fall fulcrum of the front and rear fall fulcrums, which is the ground contact position of the iron wheel with respect to the track, is significantly closer than the rear fall fulcrum. There is a problem that the working range (working radius) in front of the vehicle body becomes extremely narrower than the working range (working radius), and the stability performance of the vehicle during work at a high place deteriorates.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a road-rail work vehicle capable of improving the stability performance of a vehicle in a track traveling mode.

In order to solve the above problems, the railroad work vehicle according to the present invention includes a vehicle body, a swivel table provided on the vehicle body so as to be swivel, a boom provided on the swivel table at least undulatingly, and the vehicle body. It is provided with a pair of left and right road running wheels that are rotatably provided in the front-rear direction and can run on the road, and a pair of left and right orbital running wheels that are rotatably provided in the front and rear of the vehicle body and can run on the track. , The road traveling mode in which the track traveling wheel is stored in the vehicle body so that the road traveling wheel can travel on the road, and the track traveling wheel is extended toward the track and the track traveling wheel is used. In a tracked work vehicle configured to be switchable to a track traveling mode that enables traveling on a track, in the track traveling mode, a pair of left and right track traveling wheels on the front side of the vehicle body and a pair of left and right wheels on the rear side of the vehicle body. It is characterized in that the turning center of the turning table is arranged at the center position in the front-rear direction of the vehicle body between the wheels for traveling on a track.

According to the road-rail vehicle according to the present invention, when the road-rail vehicle is in the track traveling mode, the front and rear of the vehicle body between the pair of left and right track traveling wheels on the front side of the vehicle body and the pair of left and right track traveling wheels on the rear side of the vehicle body. By arranging the turning center of the turning table at the center position in the direction, the overturning fulcrum, which is the ground contact position of each track traveling wheel, has the same positional relationship between the front side and the rear side of the vehicle body with respect to the turning center. Therefore, the size of the working range (working radius) can be set to be the same in the front area and the rear area of the vehicle body (the working range in front of and behind the vehicle body can be secured uniformly and sufficiently wide), and the vehicle travels on a track. It is possible to improve the stability performance of the vehicle in the mode.

It is a side view of the road-rail work vehicle which concerns on this embodiment. It is a perspective view of the road-rail work vehicle which concerns on this embodiment. It is a side view which shows the state (track running mode) overhanging the iron wheel of the road-rail work vehicle which concerns on this embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The road-rail work vehicle 1 according to the present embodiment is shown in FIGS. 1 to 3, and first, the overall configuration of the road-rail work vehicle 1 will be described with reference to these figures.

The road-rail work vehicle 1 is based on a truck vehicle having a driving cab 2a at the front portion of the vehicle body 2 and capable of traveling by a pair of left and right tire wheels (wheels for road traveling) 3 arranged in front of and behind the vehicle body 2. Has been done.

A pair of left and right iron wheel support members (iron wheel support brackets) 11 are arranged on the front and rear of the vehicle body 2 so as to be swingable in the vertical direction, located on the rear side of each tire wheel 3. A pair of left and right front iron wheels (wheels for traveling on a track) 12f are rotatably attached to the tip of the front iron wheel support member 11. A pair of left and right rear iron wheels (wheels for traveling on a track) 12r are rotatably attached to the tip of the rear iron wheel support member 11. In the following description, the front side iron ring 12f and the rear side iron wheel 12r are not distinguished and are also simply referred to as "iron wheel 12".

The iron wheel support member 11 swings upward to store the iron wheel 12 in the vehicle body 2 and swings downward to move the iron wheel 12 by the expansion / contraction drive of an iron wheel swing cylinder (hydraulic cylinder) (not shown). It swings with the iron ring overhanging position that overhangs the track (rail). The left and right front iron wheels 12f are each connected to the output shafts of an iron wheel traveling motor (hydraulic motor) (not shown), and the output (driving force) of the iron wheel traveling motor is transmitted via a speed reducer (not shown). Therefore, the rotation is driven with the rotation center X as an axis (rotation axis).

At the center of the lower part of the vehicle body 2, a turntable 15 (see FIG. 3) is provided for remounting the road-rail work vehicle 1 on the track (for projecting the iron wheel 12 downward or storing it upward). .. The turntable 15 can be extended downward or stored upward by the expansion / contraction drive of the turntable cylinder (hydraulic cylinder) (not shown), and further, the vehicle body turning motor (hydraulic motor) (not shown) can be used. , The vehicle body 2 can be turned horizontally with respect to the turntable 15. Instead of the vehicle body turning motor described above, the vehicle body 2 may be configured to be able to turn horizontally with respect to the turntable 15 manually by the operator (manpower of the operator).

Outrigger jacks 17 for lifting and supporting the road-rail work vehicle 1 are arranged at four locations on the front, rear, left and right sides of the vehicle body 2. Each outrigger jack 17 lifts and supports the vehicle body 2 by driving a jack cylinder (hydraulic cylinder) (not shown) provided inside the outrigger jack 17 and extending it downward to stabilize the entire vehicle.

In the mounting region behind the driving cab 2a in the vehicle body 2, a swivel table 20 driven by a boom swivel motor (hydraulic motor) 21 provided in the vehicle body 2 and configured to be horizontally swivel around the vertical axis is provided. There is. The swivel base 20 connects a substantially disk-shaped swivel base 22 that is rotatably supported on the vehicle body 2, a pair of side plates 23 erected at the upper end of the swivel base 22, and a pair of side plates 22 to each other. It is configured to have a connecting plate 24. Although not shown, a mechanism such as a gear mechanism and a bearing that rotatably supports the swivel base 22 is attached to the vehicle body 2 side in addition to the boom swivel motor 21 described above. The swivel base 20 is supported so as to be horizontally swivel with the swivel center Y as an axis (swivel shaft) via a mechanism such as a gear mechanism and a bearing provided on the vehicle body 2. The turning center Y is provided at the center position in the vehicle width direction (left-right direction). Further, a base end portion of the boom 30 is attached to the upper portion of the side plate 23 of the swivel base 20 via a foot pin 29 so as to be swingable (undulating) in the vertical direction.

The boom 30 has a configuration in which a base end boom 30a, an intermediate boom 30b, and a tip boom 30c are combined in a nested manner in order from the swivel base 20 side, and a boom telescopic cylinder (hydraulic cylinder) provided inside the boom 30. By the expansion / contraction drive of 36, the boom 30 can be expanded / contracted in the axial direction (longitudinal direction). A boom undulating cylinder (hydraulic cylinder) 35 is straddled between the base end boom 30a and the swivel base 20, and by telescopically driving the boom undulating cylinder 35, the entire boom 30 is moved up and down (vertical surface). It can be undulated within.

A workbench support bracket 38 is pivotally supported at the tip of the tip boom 30c so as to swing within the undulating surfaces (upper and lower surfaces) of the boom 30, and the workbench 40 is arranged on the upper surface of the workbench support bracket 38. It is installed. The workbench support bracket 38 is leveled by a leveling mechanism (not shown) so that the upper surface of the workbench support bracket 38 (that is, the floor surface of the workbench 40) is always kept horizontal regardless of the undulation angle of the boom 30. Has been done. Further, the workbench support bracket 38 is provided with a workbench swivel motor (hydraulic motor) (not shown), and by rotating the workbench swivel motor, the entire workbench 40 is swung horizontally (swinging operation). ) Can be made.

The work table 40 includes a substantially rectangular work floor 41 on which an operator can board, and a foldable handrail 42 provided around the work floor 41. The work table 40 is provided with a work operation device (upper operation device) 43 provided with various operation means such as an operation lever, an operation switch, and an operation dial operated by an operator on the work table 40. The operator on the workbench 40 operates the work operation device 43 to rotate the swivel base 20 and the boom 30 (rotational drive of the boom swivel motor 21) and the undulations of the boom 30 (boom undulation cylinder 35). Each operation operation such as expansion / contraction drive), expansion / contraction movement of the boom 30 (expansion / contraction drive of the boom expansion / contraction cylinder 36), and swinging movement of the work table 40 (rotational drive of the work table rotation motor) can be performed. Although not shown, the vehicle body 2 is also provided with a work operation device (lower operation device) so that an operator on the ground or on the vehicle body 2 can perform the above operation operation.

The hydraulic actuators such as the iron wheel swing cylinder, the turntable cylinder, the vehicle body swivel motor, the jack cylinder, the boom swivel motor 21, the boom undulation cylinder 35, the boom telescopic cylinder 36, and the workbench swivel motor are the PTO mechanism (PTO mechanism) from the vehicle engine. It is driven by hydraulic oil supplied from a hydraulic pump (not shown) driven by power taken out via (not shown), and is operated by operating devices 43 and the like provided on the vehicle body 2 and the workbench 40. It is supposed to be done.

The road-rail work vehicle 1 configured in this way has a road traveling mode in which a pair of left and right front iron wheels 12f and rear iron wheels 12r are stored in the lower part of the vehicle body 2 and can travel on the road by the tire wheels 3, respectively. The pair of left and right front iron wheels 12f and rear iron wheels 12r project downward from the vehicle body 2 and can be switched to a track traveling mode in which the iron wheels 12f and 12r can travel on the track (rail R).

The turntable 15 is used when switching the traveling mode, that is, switching from the road traveling mode to the track traveling mode or vice versa. For example, when shifting from the road traveling mode to the track traveling mode, first, the road-rail vehicle 1 is driven on the road, moved to the railroad crossing closest to the work site, and stopped so as to straddle the rail R. Next, the turntable cylinder is operated to project the turntable 15 downward, and the vehicle body 2 is lifted and supported by the turntable 15. Subsequently, by driving the vehicle body turning motor to horizontally rotate the turntable 15, the vehicle body 2 is rotated by about 90 degrees so that the front-rear direction of the vehicle body 2 coincides with the extending direction of the rail R.

Next, the front iron wheel 12f and the rear iron wheel 12r are projected downward by the drive of the iron wheel rocking cylinder, and the front iron wheel 12f and the rear iron wheel 12r are rail R while the turntable 15 is retracted upward by the drive of the turntable cylinder. Ground on top. As a result, the road-rail work vehicle 1 is in a state of being remounted and moved from the road onto the rail R (that is, the track traveling mode).

When the road-rail vehicle 1 is in the track traveling mode, the turning center Y of the turning table 20 is arranged at the center position in the front-rear direction of the vehicle body between the pair of left and right front iron wheels 12f and the pair of left and right rear iron wheels 12r. It becomes. That is, when the road-rail work vehicle 1 in this track traveling mode is viewed from the vehicle width direction (left-right direction), it is between the ground contact position (axle position) of the front iron wheel 12f with respect to the rail R and the turning center position of the turning table 20. The distance D1 is equal to the distance D2 between the ground contact position (axle position) of the rear iron wheel 12r with respect to the rail R and the turning center position of the turning table 20. In addition, "equal" does not mean equality in a strict sense, but includes a range that can be evaluated as substantially equal or substantially equal. For example, in the present embodiment, it is sufficient that the two numerical values (distances D1 and D2) are close to each other so that the working range (working radius) can be set substantially the same in the front region and the rear region of the vehicle body 2. The numerical values (distances D1 and D2) do not have to be exactly the same.

The road-rail work vehicle 1 that has been remounted and moved on the rail R can travel on the rail R by rotationally driving the front iron wheel 12f by the iron wheel traveling motor. When the road-rail work vehicle 1 is driven on the track and moved to the work site, the worker gets on the work table 40 and operates the work operation device 43 to move the work table 40 on which he / she is boarding to a desired high position. It can be moved to perform predetermined work. At this time, the ground contact positions of the front and rear iron wheels 12f and 12r are evenly arranged with respect to the turning center position of the swivel base 20, so that the overturning fulcrum which is the grounding position of the iron wheels 12f and 12r is relative to the turning center Y. Since the front side and the rear side of the vehicle body 2 have the same positional relationship, the size of the work range (the range in which the tip portion of the boom 30 can be moved) is set to be the same in the front region and the rear region of the vehicle body 2. This makes it possible to improve the stability performance of the vehicle body 2 in the track traveling mode.

When the predetermined work is completed, the road-rail work vehicle 1 is driven on a track to move to the railroad crossing, and the vehicle body 2 is lifted and supported by the turntable 15 to make a horizontal turn. At this time, the front iron ring 12f and the rear iron ring 12r are stored in the upper storage position apart from the rail R. Then, after the turntable 15 is retracted and operated to lower the vehicle body 2 onto the road, the tire wheels 3 are driven to travel on the road and move to another place.

As described above, according to the road-rail work vehicle 1 of the present embodiment, when the road-rail work vehicle 1 is in the track traveling mode, the center position in the vehicle body front-rear direction between the pair of left and right front iron wheels 12f and the pair of left and right rear iron wheels 12r. Since the turning center Y of the turning table 20 is arranged, the overturning fulcrum, which is the ground contact position of the iron wheels 12f and 12r, has the same positional relationship between the front side and the rear side of the vehicle body 2 with respect to the turning center Y. , The size of the working range (working radius) can be set to be the same in the front area and the rear area of the vehicle body 2 (the working range in front of and behind the vehicle body 2 can be secured uniformly and sufficiently wide), and the track. It is possible to improve the stability performance of the vehicle in the traveling mode.

In the present embodiment, a wide space is secured between the operation cab 2a and the swivel base 20 on the vehicle body 2, and the hydraulic oil discharged from the hydraulic pump is supplied to each hydraulic actuator in the space. A valve unit (flood control unit) 51 for control, an air tank 52 for storing compressed air used for braking the tire wheels 3 (compressed air supplied to the vehicle brake that applies braking force to the tire wheels 3), and the like are arranged. ing.

The present invention is not limited to the above embodiment, and can be appropriately improved as long as it does not deviate from the gist of the present invention.

In the above embodiment, of the front and rear iron wheels 12f and 12r, the front iron wheel 12f is configured as a drive wheel, but the present invention is not limited to this configuration, and even if the rear iron wheel 12r is configured as a drive wheel, the front side Both the iron wheel 12f and the rear iron wheel 12r may be configured as drive wheels. Further, in the above embodiment, the front iron wheel 12f is rotationally driven by a hydraulic motor, but the front iron wheel 12f may be rotationally driven by an electric motor.

Further, the road-rail work platform according to the present invention includes an electric drive type (battery drive type) road-rail work platform and a PTO drive type road-rail vehicle in which the power of the engine is taken out by a PTO mechanism (power take-off mechanism) to drive a hydraulic pump. It may be either a work vehicle or a hybrid type road-rail work vehicle equipped with both of them and selectively switching the power source. In addition, in the above embodiment, the rear retractable road-rail work vehicle in which the boom is retracted and retracted to the rear side of the vehicle body is illustrated, but the front retractable type in which the boom is retracted and stored in the front side of the vehicle body. Road-rail vehicles may be applied.

1 Road-rail vehicle 2 Body 3 Tire wheels (wheels for road driving)
11 Iron wheel support member 12 Iron wheel (wheel for track running)
15 Turntable 20 Turntable 30 Boom 40 Worktable 43 Work operation device R rail (track)
X Center of rotation (Center of rotation of wheels for orbital travel)
Y turning center (turning center of turning table)

Claims (1)

With the car body
A swivel table provided on the vehicle body so that it can swivel
A boom provided on the swivel table at least undulatingly,
A pair of left and right road running wheels that are rotatably provided on the front and rear of the vehicle body and can run on the road.
It is provided with a pair of left and right track traveling wheels that are rotatably provided on the front and rear of the vehicle body and can travel on the track.
A road traveling mode in which the track traveling wheel is stored in the vehicle body so that the road traveling wheel can travel on the road, and the track traveling wheel is projected toward the track and the track is driven by the track traveling wheel. In a road-rail work vehicle that can be switched to a track running mode that enables traveling on the top
In the track traveling mode, the turning center of the turning table is set at the center position in the front-rear direction of the vehicle body between the pair of left and right track traveling wheels on the front side of the vehicle body and the pair of left and right track traveling wheels on the rear side of the vehicle body. A road-rail work vehicle characterized by being placed.

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