JP6309339B2 - Road-rail car - Google Patents

Description

  The present invention relates to an amphibious vehicle having an excavator body provided with a driver's seat, an orbital wheel for traveling on a track, and a crawler for traveling on land, and more specifically, an amphibious vehicle. The present invention relates to a technique for suppressing the occurrence of a malfunction due to an erroneous operation of a lever by devising a hydraulic piping of a drive system when a vehicle is on a track.

  When pile driving work or ground improvement work is performed near railway lines, it may be inconvenient for an excavator equipped only with crawlers. Excavators equipped with crawlers can perform work near the tracks, but there is a risk of trajectory damage due to movement on the crawler, and excavation occurs because the presence of the trajectory hinders movement on the crawler. This is because workability is significantly reduced. In order to solve this problem, a technique such as Patent Document 1 is disclosed.

  Patent Document 1 discloses a technology related to a road-rail vehicle. A track-and-rail vehicle that has a track wheel that can be moved up and down on a traveling body having a land traveling means, and that can be switched between land traveling and track traveling by raising and lowering the track wheel. The housing can be stored so as not to protrude from both ends in the traveling direction.

JP-A-9-142116

  However, when a road-rail vehicle moves on a track, a dedicated operation panel for track travel is not provided, and it is necessary to operate using a land travel lever. And, while the land travel lever can be controlled so that the crawler rotates in different directions on the left and right, when used for traveling on the track, it must be controlled so that the front and rear wheels rotate in the same direction. The operation method is different when running on land and on track. For this reason, the technique which prevents an operation mistake was calculated | required.

  Specifically, when traveling on a track, the lever operation must be moved by the same angle in the same direction using the right and left levers. If the angle moved by the right and left levers changes, the rotational speed of the front and rear wheels will differ. This is because the crawler and wheels are driven by a hydraulic motor in many cases, and the hydraulic pressure supply amount is determined by the tilt angle of the lever, so if there is a difference between the left and right, there will be a difference in rotation between the front and rear wheels when traveling on a track. Because. As a result, there is a risk of causing a slip, damaging a wheel or rail, or causing damage to the motor due to negative pressure. Also, if only one lever is operated by mistake, the wheel is dragged with one wheel locked, and if the left and right levers are tilted in the opposite direction, the front and rear wheels rotate reversely, causing the wheels to idle and damaging the wheels and rails. There is a fear. Such a problem is not shown in Patent Document 1.

  Accordingly, an object of the present invention is to provide a road-rail vehicle having a function of preventing an error in lever operation in order to solve such a problem.

  In order to achieve the above object, an amphibious vehicle according to an aspect of the present invention has the following characteristics.

(1) Railroad having an upper turning body having a driver's seat, a lower traveling body having a crawler that rotatably holds the upper turning body and travels on land, and a track wheel that is provided to travel on the track. In the dual-purpose vehicle, the crawler included in the lower traveling body includes a left crawler and a right crawler, the left crawler is driven by a first hydraulic motor, and the right crawler is driven by a second hydraulic motor, The front wheel is driven by a third hydraulic motor, the rear wheel is driven by a fourth hydraulic motor, the lower traveling body is moved forward and backward, the left crawler, The right crawler, the front wheel, and the rear wheel are operated by a first control stick and a second control stick provided in the driver's seat, and the first control stick controls the left crawler. A control stick controls the right crawler, and a first bypass connecting a first forward hydraulic passage connected to the third hydraulic motor and a second forward hydraulic passage connected to the fourth hydraulic motor; And a second bypass connecting the first reverse hydraulic flow path connected to the third hydraulic motor and the second reverse hydraulic flow path connected to the fourth hydraulic motor. .

(2) In the land-rail vehicle according to (1), in the land traveling mode in which the crawler moves, the left crawler is rotated in the forward direction by tilting the first control stick in one direction, and the second crawler By tilting the control stick in one direction, the right crawler is rotated in the forward direction, and by tilting the first control stick in the other direction, the left crawler is rotated in the backward direction, and the second control stick is rotated in the other direction. In the orbital travel mode in which the right crawler is rotated in the backward direction by tilting in the direction and moved by the track wheel, the front wheel and the second control stick are tilted in one direction. It is preferable to rotate the front wheel and the rear wheel in the backward direction by rotating the rear wheel in the forward direction and tilting the first control stick or the second control stick in the other direction.

(3) In the road-rail vehicle described in (1) or (2), the front wheel and the rear wheel are rotated at a low speed by depressing either the first control stick or the second control stick. It is preferable to perform two-speed control for rotating the front wheel and the rear wheel at a high speed by defeating both the first control stick and the second control stick.

  By connecting the third hydraulic motor used for traveling on the track by the first bypass and the forward hydraulic system of the fourth hydraulic motor according to the aspect described in (1) to (3) above, the left operating lever and the right operating lever are connected. The lower traveling body can move forward regardless of which one is tilted forward. Also, by connecting the third hydraulic motor and the fourth hydraulic motor used for on-orbit travel by the second bypass, the left hydraulic lever can be moved backward regardless of whether the left or right operating lever is tilted backward. it can. By doing so, it becomes possible to prevent an operator's erroneous operation, and it is possible to reduce an operator's psychological burden. Further, since the second speed control is possible, the range of operations of the operator is widened.

It is a left side view of the amphibious excavator of this embodiment. It is a top view of the road-rail excavator of this embodiment. It is a front view of the road-rail excavator of this embodiment. It is a side view which shows the state where the amphibious excavator of this embodiment is moving on the track. It is a side view which shows the mode inside the cab of this embodiment. It is a top view which shows the mode inside the cab of this embodiment. It is a front view which shows the mode inside the cab of this embodiment. It is a hydraulic circuit used for the amphibious excavator of this embodiment.

  First, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the left side view of the amphibious excavator 100 is shown. In FIG. 2, the top view of the amphibious excavator 100 is shown. In FIG. 3, the front view of the amphibious excavator 100 is shown. Note that the track-and-drill excavator 100 shown in FIGS. 1 to 3 is in a land running state. The road-rail excavator 100 includes a lower traveling body 110 and an upper turning body 120. The lower traveling body 110 includes a crawler 11 that travels on rough terrain, and a front wheel 12 and a rear wheel 13 that travel on a track. The track wheel front wheel 12 is moved in the vertical direction by the track front wheel hydraulic cylinder 14, and the track wheel rear wheel 13 is moved in the vertical direction by the track rear wheel hydraulic cylinder 15. The state shown in FIG. 1 is a state in which the track front wheel hydraulic cylinder 14 and the track rear wheel hydraulic cylinder 15 are at the retracted end, and the track wheel front wheel 12 and the track wheel rear wheel 13 are raised.

  Further, the lower traveling body 110 is provided with a turning device 16, and the upper turning body 120 is rotatably held. The upper swing body 120 includes two front outrigger jacks 23 (right front jack 23a and left front jack 23b) in front of the base 17, and two rear outrigger jacks 25 (right rear jack 25a and left rear jack 25b) in the rear. ing. The vehicle body of the amphibious excavator 100 can be lifted by the front outrigger jack 23 and the rear outrigger jack 25, or can be supported so as to suppress vibration of the vehicle body when excavating with the auger 22 by the amphibious excavator 100. A driver's cab 18 on which an operator is boarded is provided on the upper portion of the base 17. Further, a reader 20 is provided that holds the auger 22 excavating the ground so as to be able to move up and down. The leader 20 is configured to be able to stand up and fall by a hydraulic cylinder 21.

  FIG. 4 shows a state where the road-rail excavator 100 is moving on the track. In the road-rail excavator 100, the hydraulic cylinder 21 is at the retracted end, and the leader 20 is lying down. Further, the track front wheel hydraulic cylinder 14 and the track rear wheel hydraulic cylinder 15 are at the forward end, and the track wheel front wheel 12 and the track wheel rear wheel 13 are in a state of being able to travel on the track. . The track wheel front wheel 12 and the track wheel rear wheel 13 are engaged with the upper end of the track R. The road-rail excavator 100 can be self-propelled on the track in the situation shown in FIG. In the state of FIG. 4, the maximum height and maximum width of the amphibious excavator 100 are within the vehicle limits (for example, maximum width 3000 mm, maximum height 4100 mm) defined by the railway company.

  FIG. 5 is a side view showing the inside of the cab 18. The cab 18 is provided with a front operation panel 30 and a side operation panel 31, and a plurality of operation levers and switches are arranged in each. FIG. 6 shows a plan view of the inside of the cab 18. In FIG. 7, the front view inside the cab 18 is shown. The front operation panel 30 includes a first operation panel 32 and a second operation panel 33. An operator sits on the seat 35. The second operation panel 33 includes a left operation lever 41, a right operation lever 42, and an auger rotation lever 44. The auger rotation lever 44 is an operation lever that rotates the auger 22. The left operation lever 41 is an operation lever for operating the left side of the crawler 11 and the left side of the crawler 11b, and the right operation lever 42 is an operation lever for operating the right side of the crawler 11 and the crawler right side 11a.

  FIG. 8 shows a hydraulic circuit diagram used for the road-rail excavator 100. In the hydraulic circuit 300, the turning device 16 is provided with a trajectory frame raising Li1, a trajectory frame lowering Li2, a left traveling forward Li3, a left traveling backward Li4, a right traveling backward Li5, and a right traveling forward Li6 and a drain D from the cab 18. The swivel joint 27 is connected to the lower traveling body 110 side. The crawler traveling circuit 301 and the on-orbit traveling circuit 302 are connected to each other, and the left switching circuit 304 and the right switching circuit 305 switch the respective modes.

  The left switching circuit 304 includes a first switching valve 304a that switches the connection destination of the left traveling forward Li3 to the crawler traveling circuit 301 side or the on-orbit traveling circuit 302 side, and the connection destination of the left traveling backward Li4 to the crawler traveling circuit. A second switching valve 304b for switching from the 301 side or the on-orbit running circuit 302 side is provided. The first switching valve 304a has a function of switching the left travel advance Li3 to the left advance Li31 connected to the crawler travel circuit 301 side or the track advance Li32 connected to the on-track travel circuit 302 side. The second switching valve 304b has a function of switching the left travel reverse Li4 to the left reverse Li41 connected to the crawler travel circuit 301 side or the track reverse Li42 connected to the on-track travel circuit 302 side.

  The right switching circuit 305 includes a third switching valve 305a that switches the connection destination of the right traveling backward Li5 to the crawler traveling circuit 301 side or the on-orbit traveling circuit 302 side, and the connection destination of the right traveling forward Li6 to the crawler traveling circuit. A fourth switching valve 305b for switching from the 301 side or the on-orbit running circuit 302 side is provided. The third switching valve 305a has a function of switching the right travel reverse Li5 to the right reverse Li51 connected to the crawler travel circuit 301 side or the track reverse Li52 connected to the on-track travel circuit 302 side. The fourth switching valve 305b has a function of switching the right travel advance Li6 to the right advance Li61 connected to the crawler travel circuit 301 side or the track advance Li62 connected to the on-track travel circuit 302 side. That is, by switching the left side switching circuit 304 and the right side switching circuit 305, the land traveling mode and the track traveling mode can be switched.

  The crawler running circuit 301 includes a right control circuit 312 that controls the crawler right side 11a and a left control circuit 311 that controls the crawler left side 11b. In the left control circuit 311, the left travel forward Li3 is connected to the left forward travel Li31 via the first switching valve 304a, and the left travel backward Li4 is connected to the left backward travel Li41 via the second switching valve 304b. In the right control circuit 312, the right traveling backward Li5 is connected to the right backward Li51 via the third switching valve 305a, and the right traveling forward Li6 is connected to the right forward Li61 via the fourth switching valve 305b.

  In the land traveling mode, the left operating lever 41 is tilted forward to supply hydraulic pressure to the left traveling forward Li3, and the first hydraulic motor 311a included in the left control circuit 311 drives the crawler left side 11b in the forward direction. When the left operating lever 41 is tilted backward, the hydraulic pressure is supplied to the left traveling backward Li4, and the first hydraulic motor 311a provided in the left control circuit 311 drives the crawler left side 11b in the backward direction. On the other hand, when the right operation lever 42 is tilted forward, hydraulic pressure is supplied to the right traveling forward Li6, and the second hydraulic motor 312a provided in the right control circuit 312 drives the crawler right side 11a in the forward direction. When the right operation lever 42 is tilted rearward, the hydraulic pressure is supplied to the right traveling backward Li5, and the second hydraulic motor 312a provided in the right control circuit 312 drives the crawler right side 11a in the backward direction.

  The on-track running circuit 302 includes a front wheel control circuit 321 that controls the front wheel 12 for the track and a rear wheel control circuit 322 that controls the rear wheel 13 for the track. In the front wheel control circuit 321, the left traveling forward Li3 is connected to the track forward Li32 via the first switching valve 304a, and the left traveling backward Li4 is connected to the track backward Li42 via the second switching valve 304b. In the rear wheel control circuit 322, the right traveling backward Li5 is connected to the track backward Li52 via the fourth switching valve 305b, and the right traveling forward Li6 is connected to the track forward Li62 via the fourth switching valve 305b. However, the orbit advance Li32 and the orbit advance Li62 are connected by the first bypass Li11, and the orbit retreat Li42 and the orbit retreat Li52 are connected by the second bypass Li12.

  As a result, in the track travel mode, when the left operation lever 41 or the right operation lever 42 is tilted forward, hydraulic pressure is supplied to the left travel advance Li3, and the third hydraulic motor 321a is driven in the forward direction of the track wheel front wheel 12. At the same time, hydraulic pressure is supplied to the right traveling forward Li6, and the fourth hydraulic motor 322a is driven in the forward direction of the rear wheel 13 for the track. On the other hand, when the left operation lever 41 or the right operation lever 42 is tilted backward, the hydraulic pressure is supplied to the left traveling backward Li4, the third hydraulic motor 321a is driven in the backward direction of the front wheel 12 for the track, and the right The hydraulic pressure is supplied to the traveling backward Li5, and the fourth hydraulic motor 322a is driven in the backward direction of the track wheel rear wheel 13.

  The trajectory frame raising Li1 acts on the track front frame circuit 341 to operate the track front wheel hydraulic cylinder 14, and the track rail lowering Li2 acts on the track track rear circuit 342 to operate the track rear wheel hydraulic cylinder 15. The brake unit circuit 330 is actuated by the on-track running circuit 302 and is released when the operation lever is moved with respect to the disc brakes mounted on the axles (not shown) of the track wheel front wheel 12 and the track wheel rear wheel 13. When returned, the road-rail excavator 100 acts to decelerate or stop.

  The amphibious excavator 100 according to this embodiment has the above-described configuration, and thus has the following operations and effects.

  For example, when the left operation lever 41 and the right operation lever 42 are operated at different angles or only one of them is operated in the reverse direction in the orbital running mode due to an operator's operation error or the like. Moreover, it is possible to prevent the malfunction of the amphibious excavator 100. This is because the road-rail excavator 100 has the following configuration.

  The structure of the track-rail excavator 100 is for traveling on a track with an upper swing body 120 having a leader 20 standing vertically and a crawler 11 that holds the upper swing body 120 rotatably and travels on land. In a road-rail excavator 100 having a lower traveling body 110 having track wheels 12 and 13 and an outrigger jack for receiving a moment generated by excavation, the crawler 11 included in the lower traveling body 110 includes a crawler right side 11a. The crawler right side 11a is driven by the second hydraulic motor 312a, and the crawler left side 11b is driven by the first hydraulic motor 311a to move the lower traveling body 110 forward and backward, and the track wheels 12, 13 The track wheel front wheel 12 is driven by the third hydraulic motor 321a, and the track wheel rear wheel 13 is driven by the fourth hydraulic motor 3. Is driven by 2a, advancing the undercarriage 110, it is retracted.

  Then, the crawler right side 11a, the crawler left side 11b, the track wheel front wheel 12, and the track wheel rear wheel 13 are operated by the left control lever 41 as the first control stick and the right operation lever 42 as the second control stick. The left operation lever 41 controls the crawler left side 11b, the right operation lever 42 controls the crawler right side 11a, and the orbit advance Li32 and the fourth hydraulic pressure, which are the first advance side hydraulic flow paths connected to the third hydraulic motor 321a. The first bypass Li11 that connects the orbit advance Li62 that is the second advance side hydraulic flow path connected to the motor 322a, the orbit retreat Li42 that is the first retreat side hydraulic flow path connected to the third hydraulic motor 321a, and the fourth. A second bypass Li12 that connects the orbital receding Li52, which is a second receding hydraulic passage connected to the hydraulic motor 322a.

  In the land travel mode in which the crawler 11 moves, the left operation lever 41 is tilted in one direction, the crawler left side 11b is rotated in the forward direction, and the right operation lever 42 is tilted in one direction, whereby the crawler right side 11a is moved. Rotate in the forward direction, tilt the left operation lever 41 in the other direction, rotate the crawler left side 11b in the backward direction, tilt the right operation lever 42 in the other direction, rotate the crawler right side 11a in the backward direction, In the track running mode in which the track wheels 12 and 13 are moved, the track wheel front wheel 12 and the track wheel rear wheel 13 are rotated in the forward direction by tilting the left operation lever 41 or the right operation lever 42 in one direction. By tilting the left operation lever 41 or the right operation lever 42 in the other direction, the track wheel front wheel 12 and the track wheel rear wheel 13 are rotated in the reverse direction.

  Specifically, in the orbital travel mode, either the left operation lever 41 or the right operation lever 42 provided in the cab 18 is tilted in the forward direction (the direction in which the road-rail excavator 100 moves forward even in the land travel mode). The track wheel front wheel 12 and the track wheel rear wheel 13 rotate in the direction in which the road-rail excavator 100 moves forward. This is because the orbit advance Li32 and the orbit advance Li62 are connected by the first bypass Li11, so that even if hydraulic oil is supplied from the left travel advance Li3 or hydraulic oil is supplied from the right travel advance Li6, As a result, hydraulic oil is supplied to the forward side of the third hydraulic motor 321a and the fourth hydraulic motor 322a. For this reason, the road-rail excavator 100 moves forward. On the other hand, with respect to the retreat of the road-rail excavator 100, the hydraulic oil is supplied to either the left traveling retreat Li4 or the right traveling retreat Li5 by connecting the orbit retreat Li42 and the orbit retreat Li52 by the second bypass Li12. Therefore, hydraulic oil is supplied to the backward side of the third hydraulic motor 321a and the fourth hydraulic motor 322a.

  That is, the operator of the road-rail excavator 100 operates the track traveling mode with the same feeling as when moving forward and backward using the crawler 11 in the land traveling mode, and the track wheel front wheel 12 and the track wheel rear wheel 13 are operated. Can be operated. At this time, even when both the left operation lever 41 and the right operation lever 42, different angles, or either one is operated, the amphibious excavator 100 can be moved forward or backward in the same manner. That is, only either the left operating lever 41 or the right operating lever 42 is operated, and either the track wheel front wheel 12 or the track wheel rear wheel 13 is dragged to move the road-rail excavator 100. Can be prevented. Furthermore, even when the left operating lever 41 and the right operating lever 42 are operated in the opposite directions, malfunctions can be similarly prevented. This is preferable for an operator who operates the amphibious excavator 100 because the operation burden is reduced. In addition, the work efficiency can be improved by reducing the psychological burden on the operator.

  Further, different operations can be expected when either the left operating lever 41 or the right operating lever 42 is operated and when both the left operating lever 41 and the right operating lever 42 are operated in the same direction. That is, when the amount of hydraulic oil supplied to the third hydraulic motor 321a and the fourth hydraulic motor 322a operates either the left operating lever 41 or the right operating lever 42, the left operating lever 41 and the right operating lever 42 It differs depending on whether both are operated in the same direction. For this reason, the amount of hydraulic oil supplied is greater when both the left operating lever 41 and the right operating lever 42 are operated in the same direction than when either the left operating lever 41 or the right operating lever 42 is operated. As a result, the traveling speed of the amphibious excavator 100 is increased.

  That is, the speed of the road-rail excavator 100 is changed between operating either the left operating lever 41 or the right operating lever 42 and operating both the left operating lever 41 and the right operating lever 42 in the same direction. Therefore, it is possible to realize the first speed / second speed control in the track travel mode. The amount of hydraulic oil supplied to the third hydraulic motor 321a and the fourth hydraulic motor 322a is doubled when both the left operating lever 41 and the right operating lever 42 are tilted, compared to the case where only the left operating lever 41 is tilted. become. That is, the rotation speeds of the third hydraulic motor 321a and the fourth hydraulic motor 322a are also doubled, and the moving speed of the road-rail excavator 100 can be changed. That is, it becomes possible to increase the variation of operation of the road-rail excavator 100.

  In this case, since the first bypass Li11 and the second bypass Li12 are provided, the track wheel front wheel 12 and the track wheel due to the difference in the tilt angle of the left operation lever 41 and the right operation lever 42 as shown in the problem. A difference in rotational speed from the rear wheel 13 does not occur. This is because even if there is a difference in the hydraulic pressure supply amount to the left switching circuit 304 and the right switching circuit 305, the oil is distributed through the first bypass Li11 or the second bypass Li12, so that the same amount of hydraulic oil is distributed. This is because it is supplied to the third hydraulic motor 321a and the fourth hydraulic motor 322a. As a result, the orbital wheels 12 and 13 do not run idle and are not damaged or the track R is not damaged.

  Even if the left operating lever 41 and the right operating lever 42 are tilted in different directions, for example, when the operation is wrong in the orbital running mode, the left operating lever 41 is tilted forward and the right operating lever 42 is tilted backward. Further, it is possible to prevent the race wheels 12 and 13 from slipping and hurting or damaging the track R. This is because when the left operating lever 41 and the right operating lever 42 are tilted in different directions, the hydraulic oil circulates in the circuit by providing the first bypass Li11 and the second bypass Li12. Thus, the third hydraulic motor 321a and the fourth hydraulic motor 322a do not move. Of course, if the left operating lever 41 and the right operating lever 42 are tilted at different angles, the roadside excavator 100 moves to the forward side if the tilted side, for example, the left operating lever 41 is tilted forward. Become. In this case, however, the third hydraulic motor 321a and the fourth hydraulic motor 322a rotate in the same direction. As a result, damage to the track wheels 12 and 13 and the track R is prevented.

  As mentioned above, although embodiment of the amphibious excavator 100 which concerns on this invention was described, this invention is not necessarily limited to this, A various change is possible in the range which does not deviate from the meaning. For example, with respect to the configuration of the road-rail excavator 100, changing the positions and configurations of the front outrigger jack 23 and the rear outrigger jack 25 is not hindered. In addition, the invention is not prevented from being applied to a road-rail vehicle having functions such as a backhoe, a crane vehicle, a crawler dumper, etc., instead of a construction machine that excavates with a leader 20 like the road-rail excavator 100.

11 Crawlers 12 and 13 Track wheels Front and rear wheels 18 Driver's cab 27 Swivel joints 41 and 42 Left and right operation lever 50 Cap 60 Connection bracket 100 Railroad excavator 110 Lower traveling body 120 Upper turning body 300 Hydraulic circuit 301 Crawler traveling Circuit 302 Circuit for running on track 304, 305 Left side, right side switching circuit 311, 312 Left control, right control circuit 321, 322 Front wheel, rear wheel control circuit 330 Brake unit circuit 341, 342 Railroad frame front circuit, rear circuit CL center Line KK Center of rotation L1 Distance between tracks L2 Movable distance L4 Turning radius R Track

Claims (3)

In an amphibious vehicle having an upper turning body having a driver's seat, a lower traveling body having a crawler that holds the upper turning body rotatably and travels on land, and a track wheel provided to travel on the track. ,
The crawler included in the lower traveling body has a left crawler and a right crawler,
The left crawler is driven by a first hydraulic motor, the right crawler is driven by a second hydraulic motor, and the lower traveling body is moved forward and backward,
In the wheel for the track, the front wheel is driven by a third hydraulic motor, the rear wheel is driven by a fourth hydraulic motor, and the lower traveling body is moved forward and backward,
The left crawler, the right crawler, the front wheel, and the rear wheel are operated by a first control stick and a second control stick provided in the driver's seat, and the first control stick controls the left crawler. The second control stick controls the right crawler,
A first bypass connecting a first forward hydraulic flow path connected to the third hydraulic motor and a second forward hydraulic flow path connected to the fourth hydraulic motor; and a first bypass connected to the third hydraulic motor. A second bypass connecting the reverse hydraulic flow path and the second reverse hydraulic flow path connected to the fourth hydraulic motor;
A road-rail vehicle featuring The road-rail vehicle according to claim 1,
In the land travel mode that moves with the crawler,
By tilting the first control stick in one direction, the left crawler is rotated in the forward direction,
By tilting the second control stick in one direction, the right crawler is rotated in the forward direction,
By tilting the first control stick in the other direction, the left crawler is rotated in the backward direction,
By tilting the second control stick in the other direction, the right crawler is rotated in the backward direction,
In the orbital running mode that moves with the orbital wheel,
By tilting the first control stick or the second control stick in one direction, the front wheel and the rear wheel are rotated in the forward direction,
Rotating the front wheel and the rear wheel in the reverse direction by tilting the first control stick or the second control stick in the other direction;
A road-rail vehicle featuring In the road-rail vehicle according to claim 1 or 2,
By defeating either the first control stick or the second control stick, the front wheel and the rear wheel are rotated at a low speed,
Two-speed control to rotate the front wheel and the rear wheel at high speed by defeating both the first control stick and the second control stick;
A road-rail vehicle featuring

Images