JPS6358122B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, snow removal vehicles for turnouts in stations and yards in snowy areas are capable of removing snow between the basic rail and the tongue rail without interfering with protrusions such as point devices. Completely remove the snow so that it does not interfere with the switching of the turnout, and even if the track is blocked by accumulated passenger cars or freight cars, the snow can be removed to the desired turnout where it should be removed. It is necessary to enable the movement of The former point can be solved by making the on-vehicle snow removal system a flying snow suction system, but the latter point can be solved by using two possible methods: ground running and track running.
It requires a type of running gear and a device that allows transfer between the ground and the track.

The present invention relates to an orbital motor car used in such cases.

The present invention involves attaching a pair of wheel type track running devices to the front and rear of a vehicle body which is rotatably mounted on a crawler traveling device, which can be raised and lowered from the bottom of the crawler, and stabilizing the bottom surface of the crawler on the track bed by straddling the rails on both sides. An endless chain comprising a main track support group of a constant height that can be supported, and auxiliary track support groups disposed before and after the main track support group so that the height gradually decreases as the distance from the main track support group increases. is passed through a chain running device attached to the crawler frame side so that both crawler track support groups substantially touch the bottom surface of the crawler and draw a trajectory surrounding the crawler, and the endless chain is passed through the chain running device to the crawler crawler track. A drive mechanism for rotating the endless chain and the crawler at a constant speed is provided, and a signal generating means for generating a stop signal for the chain rotation device when the main crawler track receiver group rotates to the crawler support position and the storage position above the crawler is provided. A rail detector that issues a start signal for the chain rotation device is installed between the frames or on the chain rotation device, and on the vehicle body or crawler frame a certain distance ahead of the chain rotation device, and the rail detector is installed in sequence from the storage position to the crawler support position. It is characterized in that the rail straddling space of the main track support group to be laid is made to match the rail.

An embodiment of the present invention applied to a snowplow will be described below with reference to the drawings. Reference numeral 1 denotes a vehicle body rotatably mounted on a crawler traveling device 2 via a turntable 3, and a pair of wheel type track traveling devices 4 and 5 are mounted on the front and rear of the vehicle body 1 so as to be movable up and down relative to the bottom of the crawler. A flying snow suction type snow removal device 6 is integrally attached to the front wheel type track traveling device 4. Therefore, when the wheeled track running devices 4 and 5 are retracted upward from the bottom of the crawler as shown by the solid line in Figure 1, the crawler running device 2 can run on the road surface X--X, and as shown by the chain line in the same figure. When the wheel type track running device is pushed downward from the bottom of the crawler, the wheel type track running device can run on the rail YY, and at the same time, the suction port 6a of the snow removal device 6 comes into approximately contact with the rail.

As is clear from FIGS. 3 and 4, the crawler traveling device 2 has crawlers 8 symmetrically attached to both sides of the support base 7 of the turntable 3, and each crawler 8 is attached to the terminal end of the support base 7. Drive wheels (chain wheels) 1 are installed at the front and rear of the crawler frame 9 fixed to the
0. A driven wheel 11 is attached, a rubber crawler track 12 that does not damage the track or road is wrapped around it in an endless manner, and the drive wheel 10 is applied to the output shaft of a hydraulic motor 13 for driving the track attached to the crawler frame 9. It has a conventionally well-known configuration in which the crawler frame 9 is interlocked and connected via a speed reducer, and five idlers 14 in rolling contact with the bottom crawler track 12 are installed in the middle part of the crawler frame 9 via a suspension that can move upward by a certain amount. Elastically supported.

As shown in FIG. 11, reference numeral 15 includes seven main track supports 16 of a constant height, which are arranged so as to stably support the bottom surface of the crawler 8 on the track bed F, straddling the rails R on both sides of the track. The endless chain is equipped with three auxiliary track supports 17 arranged at the front and rear of the main track support group such that the height decreases gradually as the distance from the main track support group increases, and the endless chain 15 is attached to the crawler frame 9. Drive wheel (chain wheel) 18 and chain guide wheel 19,
20 and 21, and the main and sub-crawler support 1 is rotated by the endless chain 15.
The trajectories 6 and 17 are the bottom of the crawler 8 or the crawler track 1.
2 and surrounds the crawler. In the case shown, the front and rear chain guide wheels 1 at the bottom of the chain rotation device
The rotation axes of 9 and 20 are respectively connected to the drive wheel 1 of the crawler.
0. The radius of curvature of the chain 15 that passes through the front and rear chain guide wheels 19 and 20 is made smaller than the pitch radius of the drive wheel 10 and the driven wheel 11, so that the axis of rotation of the driven wheel 11 substantially coincides with the axis of rotation of the driven wheel 11.

22 is an arm 23 (fourth arm) fixedly supported on the support base 7;
The output shaft of the hydraulic motor 22 is operatively connected to the drive shaft 26 of the drive wheels 18 on both sides via a chain transmission 24 and a hydraulic sliding clutch 25. The endless chain 15 is rotated at the same speed and in the same direction as the crawler belt 12. The slip clutch 25 is intended to prevent damage to the main and sub crawler tracks by idling when a load exceeding a certain limit is applied, but it is not always necessary.

As shown in FIG. 6, the main crawler support 16 has a rubber track support body 16b fixed to a horizontal L-shaped plate 16a attached to the endless chain 15, and a horizontal support body 16b is attached to the inner end of the L-shaped plate. A bent portion 16c is provided, and the auxiliary crawler track holder 17 also has exactly the same configuration. The bent portions 16c etc. of the main and auxiliary track supports are slidably engaged with the guide rails 27 and 28 attached above and below the crawler frame 9 to prevent the main and auxiliary track supports from sagging. The guide rail 28 is suitably and movably attached to the crawler frame so that the bent portion 16c etc. that slide inside the guide rail 28 can move up and down relative to the crawler frame 9 as shown in FIG.

As shown in FIG. 5, 29 is a rail detector attached to the lower surface of the vehicle body 1 (which may be the front extension of the crawler frame) a certain distance ahead of the chain running device. A tension spring that does not operate due to the resistance of snow accumulation is provided between the upper end of the detection lever 32 whose intermediate portion is pivoted 31 to the support plate 30 and whose lower end faces the upper part of the rail R and the rear end of the support plate 30. 33 is stretched, and a normally open limit switch 34, which is closed by the detection lever 32 when it reaches the vertical position shown in the figure, is attached to the support plate 30, and at the same time, it is closed facing the upper surface of the rail R. A normally open iron detection switch 35, such as a proximity switch, is attached to the support plate 30.

Both switches 34 and 35 of the rail detector 29
The horizontal distance L between the center of the rail R and the lower part of the vertical center line of the drive wheel 10 or 19 at the moment when both are closed is the horizontal distance L between the center of the rail R and the lower part of the vertical center line of the drive wheel 10 or 19. It is approximately equal to the length of the endless chain 15 between the center of the rail straddling space Z and the lower part of the vertical center line of the drive wheel 19.

36 and 37 are the support stand 7 or guide rail 27
In the retracted position of the main track support 16 group shown in FIGS. 3 and 4, the limit switch 36 is opened by a protruding dog 38 attached to the endless chain 15.
When the main crawler support group has rotated to the crawler support position shown in FIG. 11, the limit switch 37 is opened by a similar protruding dog (not shown) attached to the endless chain 15.

FIG. 7 shows the control electric circuit of the hydraulic motor 22 that drives the chain rotation device, and shows the power supply E and the relay 39.
The series connection switches 34 and 35 of the rail detector and the manual pushbutton switch 40 are connected in parallel between the electromagnetic coil 39a of the sensor, and the normally closed limit switch 3 is connected in a self-holding circuit by the first relay contact 39b.
6 and 37 are inserted in series, and the second relay contact 39c of the relay 39 is inserted into the operating circuit of the solenoid 41 of the solenoid valve for controlling the hydraulic motor 22, which is always energized to return to the closed position.

Next, the operation of the present invention will be explained. In the state shown by the solid line in FIG. 1 or in the state shown in FIG. 12, in which the track motor car runs on the road surface or the track bed F by the crawler traveling device 2, the main and sub crawler track supports 16 and 17 are in the third position.
In the stored position on the crawler 8 shown in FIGS. 5 to 5, the normally closed switch 36 is opened by the dog 38 as shown by the dotted line in FIG.

The crawler traveling device 2 moves to the 12th for entering the track.
When the rail detector 29 moves forward in the direction of the arrow and reaches the position shown in FIG. 5, and the switches 34 and 35 of the rail detector 29 close, the relay 39 shown in FIG. 7 becomes conductive and closes its contacts 39b and 39c. The solenoid 41 becomes conductive and drives the hydraulic motor 22, causing the chain 15 to rotate at the same speed and in the same direction as the crawler belt 12. As the chain 15 rotates, the dog 38 separates from the normally closed switch 36 and closes the normally closed switch while the switches 34 and 35 are closed, so the self-holding circuit of the relay 39 becomes conductive and the switches 34 and 35 close. Chain 15 continues to circulate even after opening.

In this way, as the detection lever 32 climbs over the rail R and the crawler traveling device 2 moves forward, as shown in FIGS.
As shown in FIG. 9, the front ends of the crawlers 8 on both sides ride on the auxiliary track supports 17 on both sides that are in contact with the ground, and the front ends of the crawlers 8 on both sides are lifted up. This is because the main and auxiliary track holders 16 and 17 are in approximate contact with the bottom of the crawler 8 and draw a trajectory surrounding the crawler, and the chain 15 rotates at a constant speed in the same direction as the track 12. This is because, after the main and sub-crawler bearings have sequentially grounded in advance, the crawler rides on them.

When the crawlers 8 on both sides move forward by a distance L from the position shown in FIG. As shown in Figure 10, the rail straddles and moves forward, and the next rail straddle space Z matches the rail R on the other side. In this way, the main crawler support 16
When the group reaches the crawler support position shown in FIG. 11 or 13, the normally closed switch 37 in the self-holding circuit of the relay 39 opens, and its relay contacts 39b,
39c is opened, the solenoid 41 becomes non-conductive and stops the hydraulic motor 22, but at the same time, the crawler traveling device 2 is also stopped.

From the state shown in FIG. 13, the vehicle body 1 is turned 90 degrees by the turntable 3, and the front and rear wheel-type track running devices 4, 5 are pushed down and the wheels are engaged with the rails R on both sides, as shown in FIG. In this way, the main track support 16 group is lifted above the rail. Therefore, the seventh
The push button switch 40 in the figure is replaced with the normally closed switch 37.
is closed by the rotation of the chain 15 and the self-holding circuit is turned on. When this is continued, the chain rotation device is activated and the main and sub-track support groups return to the retracted position, and at the same time the normally closed switch 36 is opened by the dog 38. Then, the chain moving device stops, and then the crawler traveling device 2 is again turned 90 degrees by the turntable 3 to the state shown in FIG. 15, and the snow removal device 6 can remove snow.

Also, when escaping from this track running state onto the road surface or track bed, the operations in the reverse order of the above are performed. That is, after turning the crawler traveling device 2 by 90 degrees and rotating the main track support 16 group to the crawler support position by pressing the push button switch 40 and returning to the state shown in FIG. 14, the wheeled track traveling device 4, 5 is retracted to ground the main track support group on the track bed, then the turntable 3 turns the car body 1 90 degrees to return to the state shown in FIG. At the same time, the main and sub-crawler bearing groups are returned to the storage position at the same time as the starting and the crawler traveling device 2 escapes from the orbit. In this case, the rail detector 2
If there is a possibility that the rail detector 9 may interfere with the road surface or the track bed, the rail detector should of course be of a retractable type.

In the illustrated embodiment, the lower chain guide wheel 19,
The reason why the rotational axes of 20 are made to substantially coincide with the rotational axes of the drive wheel 10 and the driven wheel 11, respectively, is to shorten the front and rear length of the chain circulation device and make it easier to install it under a narrow floor of a snowplow or the like. This is also to prevent damage to the chain circulation device during crawler travel. The reason why the radius of curvature of the chain passing through the lower chain guide wheels 19 and 20 is made smaller than the pitch circle radius of the drive wheel 10 is because the main and sub-track support 1 immediately before touching the ground
This is to increase the rotational angular velocity of the crawler belts 6 and 17 to be greater than the rotational angular velocity of the crawler belt 12, thereby improving the advance ground contact performance of the main and sub crawler support with respect to the crawler belt.

According to the present invention, when the crawler traveling device enters the track, the engagement of the track traveling device with the rail is prevented by installing the main and auxiliary track supports slightly before the crawler track touches the ground so as not to interfere with the rail. The crawler can be lifted and supported on the rail, and when the crawler travel device escapes from the track, the crawler can be smoothly grounded while the main and sub-track supports are retracted so as not to interfere with the rail at the same time as the escape. It is highly effective as a track motor car that can be driven and freely switched between crawler and track travel.

[Brief explanation of the drawing]

1 and 2 are a side view and a front view, respectively, showing an outline of an embodiment of the present invention; FIGS. 3 and 4 are a side view and a plan view, respectively, of a crawler traveling device;
Fig. 5 is a side view showing the mounting position of the rail detector, Fig. 6 is a longitudinal sectional front view of the main part of the chain moving device, and Fig. 7 is an electric circuit diagram for controlling the chain moving device.
FIGS. 8 to 11 are side views showing the progress of the operation of the main and sub-crawler bearing groups, and FIGS. 12 to 15 are side views showing the progress of entering the track from the crawler running state. DESCRIPTION OF SYMBOLS 1...Vehicle body, 2...Crawler traveling device, 3...Turntable, 4, 5...Wheel type track traveling device, 6...Snow blowing snow removal device, 8...Crawler, 9...Crawler frame, 10...Drive wheel, 12... Crawler track, 13... Hydraulic motor, 15... Endless chain, 16... Main crawler support,
17... Sub-crawler holder, 18... Drive wheel, 19, 20, 2
1... Chain guide wheel, 22... Hydraulic motor, 29... Rail detector, 34... Limit switch, 35... Iron material detection switch, 36, 37... Normally closed limit switch, Z... Rail straddling space.

Claims (1)

[Scope of Claims] 1. A pair of wheel-type track running devices that can be raised and lowered from the bottom of the crawler are attached to the front and rear of the vehicle body which is rotatably mounted on the crawler traveling device, and the vehicle body is mounted on the track bed by straddling the rails on both sides. A main crawler support group of a constant height that is arranged to stably support the bottom surface of the crawler, and a sub-crawler support group that is disposed before and after the main crawler support group so that the height gradually decreases as the distance from the main crawler support group increases. The endless chain is mounted on a chain rotation device attached to the crawler frame side so that both crawler track support groups substantially touch the bottom surface of the crawler and draw a trajectory surrounding the crawler, and the endless chain is attached to the chain rotation device. a drive mechanism for rotating at the same speed as the crawler track, and signal generating means for issuing a stop signal for the chain rotation device when the main crawler support group rotates to the crawler support position and the storage position above the crawler, respectively. A rail detector is installed between the endless chain and the crawler frame or on the chain moving device, and is installed on the vehicle body or crawler frame at a certain distance in front of the chain moving device, and a rail detector that issues a start signal for the chain moving device,
A track motor car characterized in that the rail straddling space of the main crawler track receiver group, which is sequentially laid from the storage position to the crawler support position, matches the rail. 2. The orbital motor car according to claim 1, wherein the rotational axes of the front and rear chain guide wheels at the lower part of the chain circulation device are made to substantially coincide with the rotational axes of the driving wheels and driven wheels of the crawler, respectively. 3. The orbital motor car according to claim 1 or 2, wherein the radius of curvature of the chain passing through the front and rear chain guide wheels at the bottom of the chain rotation device is smaller than the pitch circle radius of the drive wheels of the crawler.