JP6929080B2 - Height measuring trolley - Google Patents

Description

The present invention relates to a height measuring bogie capable of continuously measuring the height of an in-track structure such as a reaction plate installed in a railway track.

In recent years, in newly constructed subway lines, the introduction of linear motor drive systems has been widespread in terms of keeping the height of the vehicle body low to reduce the cross-sectional area of the tunnel and dealing with steep slopes. In this linear motor drive, a propulsive force is generated between a motor coil mounted on the vehicle side (primary side of the motor) and a reaction plate (secondary side of the motor) installed in a belt shape in the track. Drives the vehicle.

One of the important maintenance management items in the linear motor drive system is the height of the reaction plate with respect to the rail surface (hereinafter, simply referred to as the reaction plate height). If the height of the reaction plate is not constant, the distance from the reaction plate to the motor coil on the vehicle side varies, which causes adverse effects such as the inability to obtain a stable driving force and the occurrence of contact. For this reason, it has been conventionally practiced to measure the height of the reaction plate along the trajectory. Specifically, a manual measurement method using a contact-type gap scale that is used by hanging between the crown surfaces of the left and right rails A method of attaching a non-contact displacement sensor to a vehicle and automatically measuring the height of the reaction plate while the vehicle is running is known (Patent Document 1).

However, the former manual measurement method has high measurement accuracy but extremely low efficiency, and is therefore used only for the construction of the reaction plate or for the detailed inspection of the part where the problem of the reaction plate height is suspected. On the other hand, the latter automatic measurement method is highly efficient, but it is affected by the expansion and contraction of the shaft spring provided on the bogie of the vehicle, so the measurement accuracy is low, and it is necessary to use the detailed inspection by the manual measurement method described above together. Become. For these reasons, the development of a technology capable of measuring the height of the reaction plate with high accuracy and efficiency is desired.

Japanese Patent No. 5837790

An object of the present invention is to provide a height measuring carriage capable of measuring the reaction plate height with high accuracy and high efficiency.

In order to achieve the above object, the present inventors planned to develop a dedicated trolley for measuring the height of the reaction plate. That is, on the premise that it is indispensable to mount a non-contact type displacement meter on the bogie in order to measure the reaction plate height with high accuracy and high efficiency, the influence of expansion and contraction of the shaft spring provided on the bogie is eliminated. In order to do so, we planned to develop a special bogie that omits the shaft spring.

However, if the shaft spring is omitted from the bogie, the measuring instrument (non-contact type displacement meter) mounted on the bogie tilts to the left and right with respect to the raceway surface, which may have a new adverse effect on the measurement. That is, the height difference between the left and right rails called a cant is set in the curved part of the track, and the cant amount is set in the part where the straight section shifts to the steady curve section and the part where the steady curve section shifts to the straight section. It is said to be a changing cant change section (cant increasing section and gradual decreasing section). Then, when the bogie passes through this cant change section, a difference in the cant amount occurs at each axis position due to the wheelbase (distance between the two axes) of the front and rear wheel axles of the bogie.

This situation is schematically shown in FIGS. 4 (a) and 4 (b). Further, FIGS. 3A and 3B are schematic views showing a normal bogie structure. In FIGS. 3A and 3B, 10A and 10B are front and rear left and right wheels, 11A and 11B are front and rear axles, 12A and 12B are front and rear bearings, 14 is front and rear axle box support devices, and 20 is a bogie frame. Reference numeral 40 denotes a rail, and the front and rear axle box support devices 14A and 14B have a bogie frame 20 on the front and rear axles 11A and 11B by the combination of the bearing 12A and the shaft spring 15A and the combination of the bearing 12B and the shaft spring 15B. To support. Then, as can be seen from FIGS. 4A and 4B, the inclination of the front and rear wheel sets 11A and 11B is increased due to the difference in the cant amount (cant difference δh) caused by the wheelbase L of the front and rear wheel sets 11A and 11B. A difference occurs, and a twist (twist around the center line of the bogie) occurs between the front and rear wheel sets 11A and 11B.

That is, a normal bogie absorbs the twist between the front and rear wheel axles 11A and 11B due to the cant difference δh, and absorbs and alleviates the impact from the track (impact due to passing through the rail joint, passing through the branch, etc.). The shaft springs 15A and 15B are arranged between the bogie frame 20 and the wheel shafts 11A and 11B. However, in the bogie without the shaft springs 15A and 15B, the front and rear wheel shafts 11A and 11B are twisted. Not only is one of the four left and right wheels 10A and 10B lifted from the rails 40 and 40 because it cannot be absorbed, and the measuring instrument mounted on the bogie is tilted with respect to the track surface, resulting in inaccurate measurement data. , There is also a risk of the bogie derailing.

Therefore, the present inventors have considered inclining the front and rear wheel sets 11A and 11B independently for the purpose of solving this secondary problem associated with the omission of the shaft spring, and for that purpose, the bogie frame 20 is used. It was concluded that it is effective to divide the side supported by the left and right wheels 12A on the front side and the side supported by the left and right wheels 12B on the rear side, and connect the bogie frames on both sides via a twist absorption mechanism. Reached.

The height measuring trolley of the present invention was developed based on such knowledge, and is a measuring trolley that automatically measures the height of an in-track structure installed in a railway track.
The measuring trolley has a first left and right wheel that supports one of the front and rear parts of the trolley, a second left and right wheel that supports the other of the front and rear parts of the trolley, and is supported by these wheels and is non-contact. It is equipped with a bogie frame on which a type displacement meter is mounted.
In the measurement bogie, shaft springs are eliminated between the wheel sets of the first left and right wheels and the bogie frame, and between the wheel sets of the second left and right wheels and the bogie frame.
Further, the bogie frame absorbs a twist around the bogie center line between the first portion supported by the first left and right wheels and the second portion supported by the second left and right wheels. Equipped with a twist absorption mechanism.

As for the twist absorbing mechanism, it is rational that the bogie frame is divided into a first portion and a second portion, and both portions are connected via the twist absorbing mechanism.

As a twist absorbing mechanism interposed between the first portion and the second portion, a rotary connecting mechanism in which the first portion and the second portion are rotatably connected by a shaft arranged at the center position of the carriage. Is rational.

In the height measuring trolley of the present invention, the height of the structure in the track with respect to the track surface is efficiently measured by mounting the trolley on a non-contact displacement meter. In addition, since the shaft springs are eliminated between the wheel sets of the first left and right wheels and the bogie frame, and between the wheel sets of the second left and right wheels and the bogie frame, measurement errors due to contraction of the shaft springs are eliminated. Will be done. Moreover, since the bogie frame is equipped with a twist absorbing mechanism that absorbs the twist between the first portion supported by the first left and right wheels and the second portion supported by the second left and right wheels. The twist between the wheel sets due to the wheelbase when the bogie passes through the cant diminishing section is absorbed, and the lifting of the wheels due to the twist is prevented. Measurement error is eliminated and high measurement accuracy is ensured. In addition, derailment of the vehicle is prevented.

In addition, in the height measuring trolley of the present invention, the treads located outside the flanges of the first left and right wheels and the second left and right wheels are formed as cylindrical surfaces with no slope, and these left and right wheels are left and right. It is preferable to use an independently rotating wheel having an independent wheel set. The reason is as follows. In addition, in this specification, a wheel set means an axle.

In a normal trolley, the treads of the front and rear left and right wheels are conical surfaces whose diameters gradually decrease toward the outside (see FIG. 5A). This is because the trolley smoothly passes through the curved section. That is, when the bogie passes through the curved section, the left and right wheels move to the outer rail side together with the wheel sets. When the treads of the left and right wheels are conical, the contact positions of the left and right wheels with respect to the inner and outer rails move to the outer rail side, and a difference called a wheel diameter difference occurs in the wheel rotation diameter, so that the path difference is absorbed. On the other hand, the movement of the contact position between the left and right wheels becomes an error factor when the wheel axle is tilted with respect to the raceway surface and the height of the structure in the raceway is measured.

Therefore, each tread surface of the first left and right wheels and the second left and right wheels is a cylindrical surface with no slope. By doing so, the measurement accuracy is further improved. Then, by making these left and right wheels independent rotating wheels, the path difference between the left and right wheels in the curved section is absorbed, and stable traveling in the curved section becomes possible.

The height measuring trolley of the present invention is equipped with a non-contact type displacement meter, and is between the first left and right wheels supporting one of the front and rear portions of the trolley and the trolley frame, and among the front and rear portions of the trolley. The shaft spring is eliminated from between the second left and right wheels supporting the other side of the wheel and the bogie frame, and the bogie frame has a first part supported by the first left and right wheels and a second left and right wheel. Since the twist absorbing mechanism for absorbing the twist between the wheel and the second portion supported by the wheel is provided, the height of the in-orbit structure such as the reaction plate can be measured with high efficiency and high accuracy.

It is a block diagram of the height measuring carriage which concerns on 1st Embodiment of this invention, (a) is a plan view, (b) is a side view. It is a block diagram of the height measuring carriage which concerns on 2nd Embodiment of this invention, (a) is a plan view, (b) is a side view. It is a block view of the conventional dolly, (a) is a plan view, (b) is a side view. In the explanatory view of the inclination of the front and rear wheel axles in the cant change section, (a) is a side view and (b) is a front view. In the front view which shows the tread shape of a wheel, (a) shows a conical tread, and (b) shows a cylindrical tread.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The height measuring bogie of the first embodiment is used for measuring the height of the reaction plate, which is an in-track structure installed in the railroad track, with respect to the track surface. As shown in FIGS. 1A and 1B, the height measuring trolley has first left and right wheels 10A and 10A that support one of the front and rear portions of the trolley, and a second wheel that supports the other of the front and rear portions of the trolley. The left and right wheels 10B and 10B of No. 2 and a bogie frame 20 supported by these are provided. The bogie frame 20 is rectangular in a plan view, and is divided into a first portion 20A supported by the first left and right wheels 10A and 10A and a second portion 20B supported by the second left and right wheels 10B and 10B. The first portion 20A and the second portion 20B are connected to each other via a twist absorbing mechanism 30 arranged at the center position of the bogie.

As shown in FIG. 5B, the first left and right wheels 10A and 10A supporting the first portion 20A have a flange portion, and the treads located outside the flange portion have the same outer diameter in the center line direction. It is said to be a cylindrical surface, that is, a cylindrical tread surface. The first left and right wheels 10A and 10A are provided with independent left and right wheel sets 11A and 11A, respectively, and each wheel set 11A has a side portion of the first portion 20A due to the axle boxes 13A and 13A containing the bearings 12A and 12A. By being directly attached to the lower surface, it is an independent rotating wheel. Further, since the axle boxes 13A and 13A incorporate the bearings 12A and 12A and do not incorporate the axle spring, the axle spring is excluded from between the wheel set 11A and the bogie frame 20 (first portion 20A).

The first part 20A is the front part of the bogie frame 20 here, and is equipped with a towing rod 21 for pulling the bogie frame 20 forward at the front edge portion and ancillary equipment 22 such as a power supply facility. There is.

The second left and right wheels 10B and 10B that support the second portion 20B also have a flange portion as in the case of the first left and right wheels 10A and 10A described above, and the tread surface located on the outside of the flange portion is in the center line direction. Cylindrical surfaces with the same outer diameter, that is, cylindrical treads, are provided with independent left and right wheel sets 11B and 11B, respectively, and each wheel set 11B is seconded by axle boxes 13B and 13B containing bearings 12B and 12B. By being directly attached to the lower surface of the side portion of the portion 20B, it is made into an independent rotating wheel. Further, since the axle boxes 13B and 13B incorporate the bearings 12B and 12B and do not incorporate the axle spring, the axle spring is excluded from between the wheel set 11B and the bogie frame 20 (second portion 20B).

The second portion 20B is the rear portion of the bogie frame 20 here, and is located between the second left and right wheels 10B and 10B, and mounts the non-contact displacement meter 23. The non-contact type displacement meter 23 is located on the center line of the wheel shaft 11B, irradiates a laser beam directly below from the installation position, and receives the reflected light in the track installed in the railway track. The height of the reaction plate, which is a structure, with respect to the raceway surface is continuously measured.

The twist absorbing mechanism 30 interposed between the first portion 20A and the second portion 20B is rotatably attached to a cylindrical shaft 31 arranged on the center line of the carriage frame 20 and one end of the shaft 31. A first cylinder to be externally fitted and a second cylinder to be rotatably fitted to the other end of the shaft 31 are provided, and the first cylinder is on the lower surface of the central portion of the first portion 20A. By fixing the tubular body to the lower surface of the central portion of the second portion 20B, the first portion 20A and the second portion 20B are connected, and independent rolling of the first portion 20A and the second portion 20B is allowed. .. Due to the connection between the first portion 20A and the second portion 20B, the first cylinder body and the second cylinder body are prevented from coming off with respect to the shaft 31.

The configuration of the height measuring trolley of the first embodiment is as described above. Its operation and function are as follows.

The height measurement trolley is towed by a railroad vehicle to run on a commercial line. At this time, the height of the reaction plate, which is an in-track structure installed in the railroad track, with respect to the rail surface is measured by the non-contact displacement meter 23 mounted on the bogie frame 20, particularly the second portion 20B. This enables continuous and highly efficient automatic measurement of the height of the reaction plate installed in the railroad track.

Here, each wheel set 11A provided on the first left and right wheels 10A and 10A is directly connected to the bogie frame 20 by a shaft box 13A that does not have a built-in shaft spring, so that the shaft spring is removed from the space between the first left and right wheels 10A and 10A. It is configured. Similarly, the wheel sets 11B provided on the second left and right wheels 10B and 1B are also directly connected to the bogie frame 20 by the axle box 13B that does not have a built-in axle spring, so that the axle springs are eliminated from the bogie frame 20. It is configured. Therefore, in the above-mentioned automatic measurement of the reaction plate height, the measurement error due to the contraction of the shaft spring is eliminated, and the measurement accuracy is improved.

Moreover, the bogie frame 20 rolls between the first portion 20A supported by the first left and right wheels 10A and 10A and the second portion 20B supported by the second left and right wheels 10B and 10B. Since the allowable twist absorbing mechanism 30 is provided, the twist (twist around the center line) between the first portion 20A and the second portion 20B is absorbed. At this time, regarding the pitching and yawing of the bogie frame 20, the first portion 20A and the second portion 20B operate integrally.

Therefore, the twist between the wheel axles due to the wheelbase when the height measuring bogie passes through the cant change section, that is, the wheel sets 11A and 11A on the side of the first portion 20A and the wheel sets 11B on the side of the second portion 20B. The twist around the center line of the bogie between the wheels and 11B is absorbed even though the shaft spring is not present, and the twisting of the left and right wheels 10A, 10A and 10B, 10B is prevented. As a result, the inclination of the non-contact displacement meter 23 with respect to the raceway surface due to the floating and the measurement error due to the inclination are eliminated, and the measurement accuracy is further improved. In addition, derailment of the height measuring carriage is also prevented.

In addition to this, in the height measuring carriage of the first embodiment, the treads located outside the flanges of the first left and right wheels 10A and 10A and the second left and right wheels 10B and 10B have a cylindrical surface having no slope. On top of that, these left and right wheels 10A, 10A and 10B, 10B are independently rotating wheels having independent left and right wheel sets. Therefore, even if the first left and right wheels 10A and 10A and the second left and right wheels 10B and 10B move to the outer rail side in the curved section, the wheel rotation diameter does not occur and the wheel sets 11A and 11A are inclined with respect to the raceway surface. , And 11B, 11B do not tilt with respect to the raceway surface. Therefore, the measurement accuracy in the automatic measurement of the reaction plate height is further improved.

In the curved section, if there is no difference in wheel rotation diameter between the first left and right wheels 10A, 10A and the second left and right wheels 10B, 10B, there is no difference in the route due to the difference in rotation diameter, but the left and right wheels 10A, 10A and 10B, Since all of the 10B wheels are independently rotating wheels, the outer track side wheels 10A and 10B rotate at high speed, and the inner track side wheels 10A and 10B rotate at low speed, so that the track difference is absorbed. As a result, the running stability in the curved section is further improved.

Next, the height measuring trolley of the second embodiment will be described with reference to FIGS. 2 (a) and 2 (b).

This height measuring trolley is used for measuring the height of the reaction plate, which is an in-track structure installed in the railway track, with respect to the track surface, like the height measuring trolley of the first embodiment. This height measuring bogie differs from the height measuring bogie of the first embodiment mainly in the second left and right wheels 10B and 10B that support the second portion 20B and the second portion 20B of the bogie frame 20 in particular. In particular, the wheel sets 11B, the left and right bearings 12B and 12B, and their support structures.

More specifically, the second left and right wheels 10B and 10B are connected by a common wheel set 11B, and more specifically, the common wheel set 11B is provided via the left and right bearings 12B and 12B built in the left and right wheels 10B and 10B. It is attached to both ends of. A common axle box 13B is provided on the central portion of the common wheel set 11B, and the axle box 13B is connected to the center of the rear end portion of the first portion 20A of the bogie frame 20 via the twist absorbing mechanism 30. Thereby, the rear end portion of the first portion 20A is supported.

Similar to the twist absorbing mechanism 30 provided in the height measuring bogie of the first embodiment, the twist absorbing mechanism 30 includes a cylindrical connecting shaft 31 arranged on the center line of the bogie frame 20 and one end of the shaft 31. A first cylinder that is rotatably fitted to the portion and a second cylinder that is rotatably fitted to the other end of the shaft 31 are provided, and the first cylinder is the center of the first portion 20A. It is fixed to the lower surface of the portion, and the second cylinder is fixed in the axle box 13B.

That is, in the height measuring carriage of the second embodiment, the common wheel set 11B connecting the second left and right wheels 10B and 10B also serves as the second portion 20B of the carriage frame 20, which serves as the twist absorbing mechanism 30. It is connected to the first portion 10A via. Further, the second left and right wheels 10B and 10B are independent rotating wheels by incorporating their bearings 12B and 12B in the second left and right wheels 10B and 10B, respectively. Further, since the common wheel set 11B also serves as the second portion 20B and does not incorporate the shaft spring, the shaft spring is excluded from between the two.

A tow rod 21 for pulling the bogie frame 20 forward, ancillary equipment 22 such as a power supply facility, and a non-contact displacement meter 23 are all equipped or mounted on the first portion 20A of the bogie frame 20. ..

Other configurations, for example, the first left and right wheels 10A, 10A supporting the first portion 20A of the carriage frame 20 are independent rotating wheels having independent left and right wheel axles , the first left and right wheels 10A, 10A, and the second. The treads located inside the flanges of the left and right wheels 10B and 10B are cylindrical surfaces, and the wheel sets 11A and 11A of the first left and right wheels 10A and 10A have bearings 12A and 12A built-in and shaft springs not built-in. The height of the first embodiment is that the shaft springs are removed from between the wheel sets 11A and 11A and the carriage frame 20 (first part 20A) by being directly connected to the first part 20A by the boxes 13A and 13A. It is the same as the measuring wheel.

Then, like the height measuring trolley of the first embodiment, the height measuring trolley is also towed by the railroad vehicle, and the height of the reaction plate with respect to the rail surface is measured by the non-contact displacement meter 23 to react. It enables continuous and highly efficient automatic measurement of plate height.

Similarly, the wheel sets 11A, 11A of the first left and right wheels 10A, 10A and the wheel sets 11B of the second left and right wheels 10B, 10B are directly connected to the bogie frame 20 by the axle boxes 13A, 13A and the axle box 13B, which do not have a built-in shaft spring. By doing so, the axle spring is removed from the space between the bogie frame 20 and the axle spring. Therefore, the accuracy in automatic measurement of the reaction plate height is high.

Similarly, rolling between the first portion 20A supported by the first left and right wheels 10A and 10A and the wheel axle 11B which is the second portion 20B supported by the second left and right wheels 10B and 10B, respectively. Since the allowable twist absorption mechanism 30 is equipped, the twist between the wheel sets (twist around the center line of the carriage) caused by the wheelbase when the height measuring carriage passes through the cant diminishing section is absorbed, and the measurement accuracy is measured. Is further improved, and derailment of the height measuring trolley is also prevented.

Similarly, the treads located inside the flanges of the first left and right wheels 10A and 10A and the second left and right wheels 10B and 10B are formed into cylindrical surfaces having no slope, and the left and right wheels 10A and 10A and these left and right wheels 10A and 10A and Since the 10B and 10B are independent rotating wheels having independent left and right wheel sets, there is no difference in wheel rotation radius in the curved section, the measurement accuracy is further improved, and the first left and right wheels 10A, 10A and the first left and right wheels 10A, 10A and the first Since both the left and right wheels 10B and 10B of No. 2 are independent rotating wheels, the route difference due to the absence of the difference in turning radius is absorbed, and the running stability in the curved section is further improved.

10A, 10B Wheels 11A, 11B Wheelsets 12A, 12B Bearings 13A, 13B Shaft box 20 Bogie frame 20A Bogie frame first part 20B Bogie frame second part 21 Tow rod 22 Auxiliary equipment such as power supply equipment 23 Non-contact displacement meter 30 Twist absorption mechanism 31 Shaft 40 Rail

Claims (3)

It is a measuring bogie that automatically measures the height of structures in the track installed in the railroad track.
The measuring trolley has a first left and right wheel that supports one of the front and rear parts of the trolley, a second left and right wheel that supports the other of the front and rear parts of the trolley, and is supported by these wheels and is non-contact. It is equipped with a bogie frame on which a type displacement meter is mounted.
In the measurement bogie, shaft springs are eliminated between the wheel sets of the first left and right wheels and the bogie frame, and between the wheel sets of the second left and right wheels and the bogie frame.
Further, the bogie frame absorbs a twist around the bogie center line between the first portion supported by the first left and right wheels and the second portion supported by the second left and right wheels. Equipped with a twist absorption mechanism,
The first left and right wheels and the second left and right wheels have flange portions, and the treads located outside the flange portions are cylindrical surfaces having no slope, and both have independent left and right wheel sets. A height measuring trolley that is an independent rotating wheel. In the height measuring bogie according to claim 1, the bogie frame is divided into a first portion and a second portion, and both portions are connected via a twist absorbing mechanism. In the height measuring carriage according to claim 1 or 2, the twist absorbing mechanism is a rotary connecting mechanism in which the first portion and the second portion are rotatably connected by a shaft arranged at the center position of the carriage. The height measurement trolley that is.

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