An adjustable rail train bogie and rail system facilitating on-board and climbing

Abstract

The application discloses a kind of adjustable rail train bogie and track system facilitating vehicle-mounted and climbing, a pair of rubber tires and a pair of steel wheels are coaxially installed on axle, since the adhesion between rubber tire and track is greater, thus providing greater driving force and braking force for rail train, thus can adapt to greater gradient line.And two kinds of tires bear together, so that the carrying capacity of bogie is improved, and the carrying capacity of bogie acts on spring, thus the corresponding carrying capacity can be reflected by measuring the compression length a of spring by range finder, and automatic adjustment of rubber tire pressure can be realized according to the change of compression length a of spring.The climbing gradient of existing train bogie is generally not greater than 10 ‰, and the climbing capacity of the bogie of the application can reach more than 60 ‰.Through the cooperation of two kinds of tires, the carrying capacity and climbing capacity of the bogie as a whole are improved, so that the economy is ensured and the applicability of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of rail transit devices, and particularly relates to an adjustable rail train bogie and rail system which is beneficial to vehicle loading and climbing. BACKGROUND

[0002] A rail train is generally composed of a car body, a bogie, a braking device, a car coupler and buffer device, and internal equipment, and the rail train is generally powered by a car head to pull a rear car, and the rear car also provides a hardware basis and auxiliary action for the movement of the car through the bogie. The bogie is a whole component composed of two or more wheelsets through special components, and plays the functions of supporting the car body, guiding the vehicle to travel along the track, and bearing various loads from the car body and the track.

[0003] Since the bogie in the prior art is generally equipped with only steel wheels or only rubber wheels, the running and braking of the car need to rely on the adhesion between the tires and the track. However, the adhesion between the steel wheels and the steel rails is insufficient, so when facing long and steep slopes, especially in the empty state, the bogie of the train often idles due to insufficient adhesion between the steel wheels and the steel rails, which may result in the inability to climb the slope or energy waste. In order to solve this phenomenon, most of the current solutions are to spray sand and other materials in front of the steel wheels to increase the friction between the steel wheels and the steel rails. However, this method has limited adhesion effect and practicality. Although the adhesion between the rubber wheels and the track is sufficient, the load capacity of the rubber wheels is insufficient due to the material limitation of the rubber wheels, and the rubber wheels are prone to tire burst. Therefore, the prior art still lacks a train bogie that can have both friction performance and load capacity.

[0004] Therefore, a train bogie that can be equipped with both steel wheels and rubber wheels is needed, so as to increase the friction between the wheelsets and the track to provide greater driving force and braking force, and at the same time have stronger load capacity, which is beneficial to vehicle loading and climbing. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide an adjustable rail train bogie and rail system which is beneficial to vehicle loading and climbing.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] The utility model provides a kind of adjustable rail train bogie facilitating vehicle and climbing, including bogie body, axle mounted on bogie body and spring for shock buffering;A pair of rubber wheels and a pair of steel wheels are coaxially mounted on the axle;It is characterized by further comprising range finder and tire pressure adjusting device for adjustable rubber tire pressure;The range finder and tire pressure adjusting device are connected with control device;The range finder collects spring compression length a for reflecting train load, and the control device controls the tire pressure adjusting device according to the compression length a fed back by range finder so that rubber wheel presents the following working conditions:

[0008] When compression length a is less than or equal to set threshold b, control the tire pressure adjusting device so that the tire pressure of rubber wheel is in direct proportion to compression length a;

[0009] When compression length a is greater than set threshold b and is in straight road section, control the tire pressure adjusting device so that the tire pressure of rubber wheel is in direct proportion to compression length a;

[0010] When compression length a is greater than set threshold b and is in inclined road section, control the tire pressure adjusting device so that the tire pressure of rubber wheel is in inverse proportion to compression length a.

[0011] As further improvement of the above technical solution:

[0012] Set threshold b is set as spring compression amount when train is half loaded;When compression length a is 0, the control device controls tire pressure adjusting device so that the tire pressure of rubber wheel is adjusted to its standard value minimum value;When compression length a is equal to b, the control device controls tire pressure adjusting device so that the tire pressure of rubber wheel is adjusted to half of its standard value minimum value plus standard value maximum value.

[0013] When compression length a reaches the maximum elastic limit of spring;If in straight road section, the control device controls tire pressure adjusting device so that the tire pressure of rubber wheel is adjusted to its standard value maximum value;If in inclined road section, the control device controls tire pressure adjusting device so that the tire pressure of rubber wheel is adjusted to its standard value minimum value.

[0014] The bogie body includes rocking table, and a pair of side frames symmetrically mounted on both sides of the rocking table, and the side frame is mounted on the inner side of the rubber wheel and the steel wheel;The rocking table includes bolster, and spring tray is arranged at the lower side of the bolster, and spring is clamped between the spring tray and the bolster, and the spring is symmetrically distributed at both ends of the spring tray and the bolster.

[0015] The range finder is arranged on the side of the bolster close to the spring, and one end of the range finder is fixedly connected with the spring tray.

[0016] The bogie further comprises a permanent magnet motor and a current transformer for monitoring the current value of the permanent magnet motor, the permanent magnet motor comprises a rotor assembly sleeved on the axle and a stator assembly sleeved outside the rotor assembly, the stator assembly is fixedly connected with the rocking table; and the permanent magnet motor is connected with an external power supply.

[0017] The steel wheel is located at the inner side of the rubber wheel, and the tire pressure adjusting device is installed at the outer side of the rubber wheel.

[0018] The current transformer, the distance measuring instrument and the tire pressure adjusting device are signal connected through a control device.

[0019] The control device judges the running state of the train according to the current value transmitted by the current transformer, wherein the output current value when the train is in a straight section is smaller than the output current value when the train is in a slope section.

[0020] A track system matched with a track train bogie, comprising two parallel tracks one and two parallel tracks two located at the inner side of the tracks one, the tracks one are matched and installed with rubber wheels, and the tracks two are matched and installed with steel wheels; and the tracks one and the tracks two are all fully paved.

[0021] As a further improvement of the above technical solution:

[0022] The tracks one and the tracks two are all fully paved.

[0023] Compared with the prior art, the advantages of the present application are:

[0024] By coaxially installing a pair of rubber wheels and a pair of steel wheels on the axle, greater driving force and braking force are provided for the track train, so that a larger slope line can be adapted; and the two types of tires jointly bear, so that the carrying capacity of the bogie is improved; and the distance measuring instrument measures the compression length a of the spring, and according to the change of the compression length a, the automatic adjustment of the tire pressure of the rubber wheel can be realized. The climbing slope of the existing train bogie is generally not greater than 10‰, and the climbing capacity of the bogie of the present application can reach more than 60‰. Through the cooperation of the two types of tires, the overall carrying capacity and climbing capacity of the bogie are improved, so that the economy is ensured and the applicability of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure diagram of the track train bogie and the track system in the embodiment Figure 1 ;

[0026] Figure 2 is a structure diagram of the track train bogie and the track system in the embodiment Figure 2 ;

[0027] Figure 3is a structural schematic diagram of a rail train bogie in the embodiment (side frame is not shown);

[0028] Figure 4 is a structural schematic diagram of a rocking table of a rail train bogie in the embodiment.

[0029] The various reference numerals in the figure represent: 1, bogie body; 11, rocking table; 111, bolster; 112, spring tray; 113, spring; 114, range finder; 12, side frame; 2, axle; 3, rubber wheel; 4, steel wheel; 5, permanent magnet motor; 6, bearing saddle; 7, track one; 8, track two; 9, current transformer. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] As Figures 1 to 4 shown, the adjustable rail train bogie facilitating vehicle loading and climbing in the embodiment includes a bogie body 1, an axle 2 mounted on the bogie body 1, and a spring 113 for shock absorption and buffering; a pair of rubber wheels 3 and a pair of steel wheels 4 are coaxially mounted on the axle 2; it also includes a range finder 114 and a tire pressure adjusting device for adjusting the tire pressure of the rubber wheel 3; the range finder 114 and the tire pressure adjusting device are connected with a control device; the range finder 114 collects the compression length a of the spring 113 reflecting the load of the train, and the control device controls the tire pressure adjusting device according to the compression length a fed back by the range finder 114 to make the rubber wheel 3 present the following working states:

[0032] When the compression length a is less than or equal to a set threshold value b, the tire pressure of the rubber wheel 3 is controlled by the tire pressure adjusting device to be in a positive proportional relationship with the compression length a;

[0033] When the compression length a is greater than the set threshold value b and is in a straight section, the tire pressure of the rubber wheel 3 is controlled by the tire pressure adjusting device to be in a positive proportional relationship with the compression length a;

[0034] When the compression length a is greater than the set threshold b and is in the slope section, the control device controls the tire pressure adjusting device to make the tire pressure of the rubber wheel 3 inversely proportional to the compression length a. By setting the tire pressure adjusting device, such as the tire inflation / deflation system PSI (PRESSURE SYSTEMS INTERNATIONAL) in the embodiment, or the Central Tire Inflation / Deflation System (CTI / DS), which is an advanced tire management system capable of automatically inflating / deflating the tire, the tire pressure of the rubber wheel 3 is adjusted in real time. The greater the tire pressure of the rubber wheel 3, the greater its carrying capacity, and the weaker its corresponding friction capacity, so its carrying capacity needs to be ensured on the flat section, and its friction capacity needs to be ensured on the slope section. The most important difficulty at present is how to combine the climbing performance and carrying performance, so the rubber wheel 3 and the steel wheel 4 are coaxially installed, and the tire pressure is controlled according to different road sections and different carrying capacities of the rubber wheel 3. In the unloaded state, the compression length a of the spring 113 is the smallest, and in the fully loaded state, the spring 113 reaches its maximum deformation, and the compression length a is the largest. In the case of low carrying capacity, the rubber wheel 3 does not need to increase its friction performance, and the friction performance of the rubber wheel 3 and the steel wheel 4 itself can meet the adhesion requirement between the train and the track. Therefore, when the compression length a is less than or equal to the set threshold b, the control device controls the tire pressure adjusting device to increase the tire pressure of the rubber wheel 3 with the increase of the compression length a, so as to focus on improving its carrying performance. When the compression length a is greater than the set threshold b, the friction performance of the rubber wheel 3 and the steel wheel 4 itself cannot meet the adhesion requirement between the train and the track when the train climbs. Therefore, on the slope section, the tire pressure of the rubber wheel 3 needs to be reduced to improve the adhesion between the bogie and the track. At this time, the PSI system can inversely deduce the carrying capacity of the bogie according to the compression amount of the spring 113, so as to correspondingly reduce the tire pressure of the rubber wheel 3, and when reaching the full load, the tire pressure of the rubber wheel 3 is reduced to the minimum value of the standard value again. On the flat section, there is no climbing requirement, so even if the compression length a is greater than the set threshold b, the tire pressure does not need to be reduced, so at this time the control device controls the tire pressure adjusting device to increase the tire pressure of the rubber wheel 3 with the increase of the compression length a, focusing on its carrying capacity on the flat section. In the embodiment, the rubber wheel 3 and the steel wheel 4 are in contact with the track, and the friction coefficient of the rubber wheel 3 is greater than that of the steel wheel 4. Therefore, the adhesion between the rubber wheel 3 and the track is greater, which provides greater driving force and braking force for the track train, so it can adapt to larger slope lines.The rubber wheel 3 and the steel wheel 4 are jointly loaded, so that the load capacity of the bogie is improved, and the load capacity of the bogie is applied to the spring 113. The compression length a of the spring 113 is measured by the range finder 114, so that the corresponding load capacity can be reflected. According to the compression length a of the spring 113, the tire pressure of the rubber wheel 3 can be automatically adjusted. The climbing slope of the existing train bogie is generally not greater than 10 ‰, and the climbing capacity of the bogie of the present application can reach more than 60 ‰. Through the cooperation of the two kinds of tires, the load capacity, climbing capacity and service life of the bogie are improved, so that the economy is ensured and the applicability of the device is improved.

[0035] In the embodiment, the set threshold b is set as the spring compression amount when the train is half loaded. When the compression length a is the smallest, the control device controls the tire pressure adjusting device to adjust the tire pressure of the rubber wheel 3 to the standard value of the lowest value. When the compression length a is equal to b, the control device controls the tire pressure adjusting device to adjust the tire pressure of the rubber wheel 3 to half of the sum of the standard value of the lowest value and the standard value of the highest value. Through the normalization processing of the corresponding relationship between the compression length a of the spring 113 and the tire pressure of the rubber wheel 3, the compression length a is normalized to [0, 1] from the empty state to the full load state, and the tire pressure is also normalized to [standard value of the lowest value, standard value of the highest value]. Therefore, the set threshold b is set as the spring compression length when the train is half loaded, and the tire pressure of the rubber wheel 3 is set to half of the sum of the standard value of the lowest value and the standard value of the highest value. Therefore, the load capacity of the train bogie is improved, and the accuracy of the overall tire pressure adjustment of the control device is also ensured.

[0036] In the embodiment, when the compression length a reaches the maximum elastic limit of the spring 113, if on a flat section, the control device controls the tire pressure adjusting device to adjust the tire pressure of the rubber wheel 3 to the standard value of the highest value; if on a slope section, the control device controls the tire pressure adjusting device to adjust the tire pressure of the rubber wheel 3 to the standard value of the lowest value. On the slope section, the friction performance needs to be improved to improve the climbing capacity, and on the flat section, the load capacity needs to be improved, so that the tire pressure of the rubber wheel 3 corresponding to the full load state is set to the standard value of the highest value and the standard value of the lowest value respectively on different sections, so that the different performances are best exerted, and the practicability of the device is improved.

[0037] In the embodiment, the bogie body 1 comprises a swing platform 11, and a pair of side frames 12 symmetrically installed on both sides of the swing platform 11, the side frames 12 being installed on the inner sides of the rubber wheels 3 and the steel wheels 4; the swing platform 11 comprises a bolster 111, and a spring tray 112 arranged below the bolster 111, springs 113 being clamped between the spring tray 112 and the bolster 111, the springs 113 being symmetrically distributed at both ends of the spring tray 112 and the bolster 111; the embodiment further comprises a load saddle 6 sleeved on the axle 2, the load saddle 6 being connected with the side frames 12. The force generated by the interaction between the tires and the track is transmitted to the load saddle 6 through the axle 2, and then transmitted to the bogie body 1 through the side frames 12 connected with the load saddle 6, so as to drive the vehicle body to move; the gravity of the vehicle body is also transmitted to the load saddle 6 through the bogie body 1, and then transmitted to the axle 2, the rubber wheels 3 and the steel wheels 4, so as to realize the bearing function. And by installing the load saddle 6 and the side frames 12 on the inner sides of the steel wheels 4, the length of the axle 2 is shortened, the stress state is greatly improved, and the overall volume of the bogie body 1 is obviously reduced, so it can be adapted to monorail, overhead rail and other transportation modes with high requirements for the size of the train bogie. Therefore, the carrying capacity and the force transmission capacity of the bogie are improved, the volume of the bogie is reduced, and the adaptability is enhanced. The swing platform 11 basically forms an equal-strength beam through the bolster 111, which is beneficial to reduce the gravity center of the bogie, improve the running stability and speed of the vehicle, and buffer and support the vehicle during driving through the springs 113. When subjected to the force of load or vibration, the springs 113 can produce corresponding deformation and rebound force, thereby playing a buffering role, making the vehicle run more stably and smoothly, and at the same time, the springs 113 can also bear the weight and load of the vehicle, thereby enhancing the carrying capacity of the bogie. The springs 113 are symmetrically installed at both ends of the spring tray 112 and the bolster 111, so as to facilitate the replacement of the springs 113, thereby enhancing the service life of the device.

[0038] In the embodiment, the distance meter 114 is arranged on the side of the bolster 111 close to the springs 113, and one end of the distance meter 114 is fixedly connected with the spring tray 112. One end of the distance meter 114 is fixedly connected with the spring tray 112 and moves with the spring tray 112, thereby ensuring the accuracy of the measurement of the compression length a of the springs 113.

[0039] In this embodiment, the bogie further comprises a permanent magnet motor 5 and a current transformer 9 for monitoring the current value of the permanent magnet motor 5. The permanent magnet motor 5 comprises a rotor assembly sleeved on the axle 2 and a stator assembly sleeved outside the rotor assembly, and the stator assembly is fixedly connected with the rocking table 11. The permanent magnet motor 5 is connected with an external power supply. The control device determines the running state of the train according to the current value transmitted by the current transformer 9. The output current value of the train on a flat section is smaller than that on a slope section. When the train bogie moves on a flat section, the motor output power of the permanent magnet motor 5 is smaller than that on an uphill or downhill section. Therefore, the current value of the permanent magnet motor 5 monitored by the current transformer 9 can be used to determine whether the train bogie is running on a flat section or an uphill or downhill section. When the train runs from a flat section to an uphill or downhill section, the current value will increase. At this time, the compression length a is used to determine the carrying capacity, so as to determine whether to improve the friction performance or continue to improve the carrying performance. Moreover, the permanent magnet motor 5 in the device can be used as a motor or a generator according to different use conditions. When used as a motor, the stator assembly winding is energized to generate a rotating magnetic field, which drives the axle 2 to rotate under the action of the rotating magnetic field. This rotation avoids the gear box reduction device, shaft coupling and other transmission devices, thereby reducing mechanical transmission consumption, reducing transmission noise and improving transmission efficiency of the motor. When used as a generator, the rotor assembly of the permanent magnet motor 5 is sleeved on the axle 2 and rotates with the axle 2; the stator assembly is fixedly connected with the bolster 111 in the rocking table 11, so that the rotor assembly rotates with the axle 2, and the stator assembly remains stationary, thereby causing the cutting of magnetic induction lines inside the permanent magnet motor 5, completing the power generation function, realizing energy recovery and improving energy utilization.

[0040] In this embodiment, the steel wheel 4 is located inside the rubber wheel 3, and the tire pressure adjusting device is installed outside the rubber wheel 3. In the device, the positions of the steel wheel 4 and the rubber wheel 3 are not limited, and the rubber wheel 3 and the steel wheel 4 can be arranged outside. Only a track matched with the rubber wheel 3 needs to be laid synchronously. However, since the existing national railway tracks are quite perfect and fixed, in order to improve the adaptability and reduce resource waste, the steel wheel 4 is arranged inside the rubber wheel 3, and the tire pressure adjusting device is installed outside the rubber wheel 3. Only a track matched with the rubber wheel 3 needs to be added outside the existing track to realize the use of the device. At this time, the bearing saddle 6 and the side frame 12 can also be arranged inside the pair of steel wheels 4, so as to fully utilize the space and reduce the overall volume of the bogie, thereby achieving good adaptability and practical usability.

[0041] In the embodiment, the current transformer 9, the distance meter 114 and the tire pressure adjusting device are connected by the control device. In this way, the running section of the train is determined according to the current, and the tire pressure is adjusted according to the different load, so that the whole bogie is more automatic and can adapt to different working conditions.

[0042] The track system matched with the track train bogie in the embodiment includes two parallel tracks one 7 and two parallel tracks two 8 located on the inner side of the tracks one 7, the tracks one 7 are matched and installed with the rubber wheels 3, the tracks two 8 are matched and installed with the steel wheels 4, and the tracks one 7 and the tracks two 8 are all paved throughout the track system. The track system includes two independent and parallel tracks one 7 and tracks two 8, so as to adapt to the use of the coaxial rotating rubber wheels 3 and steel wheels 4, and since the rubber wheels 3 and the steel wheels 4 can jointly work or work independently in different states, the tracks one 7 and the tracks two 8 need to be installed throughout the track section to adapt to the use of the bogie.

[0043] Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application or modify equivalent embodiments with equivalent changes without departing from the scope of the technical solutions of the present application by using the disclosed technical contents. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the content of the technical solutions of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. An adjustable railcar bogie that is advantageous for onboard operation and climbing, comprising a bogie body (1), an axle (2) mounted on the bogie body (1), and springs (113) for shock absorption; a pair of rubber wheels (3) and a pair of steel wheels (4) are also coaxially mounted on the axle (2); characterized in that: The distance measuring instrument (114) and the tire pressure adjusting device for adjusting the tire pressure of the rubber wheel (3) are also included, and the distance measuring instrument (114) and the tire pressure adjusting device are connected with the control device; the distance measuring instrument (114) collects the compressed length a of the spring (113) for reflecting the train load, and the control device controls the tire pressure adjusting device to make the rubber wheel (3) present the following working states according to the compressed length a fed back by the distance measuring instrument (114): When the compressed length a is less than or equal to the set threshold b, the tire pressure adjusting device is controlled to make the tire pressure of the rubber wheel (3) have a positive proportional relationship with the compressed length a; When the compressed length a is greater than the set threshold b and is in a straight road section, the tire pressure adjusting device is controlled to make the tire pressure of the rubber wheel (3) have a positive proportional relationship with the compressed length a; When the compressed length a is greater than the set threshold b and is in a slope road section, the tire pressure adjusting device is controlled to make the tire pressure of the rubber wheel (3) have an inverse proportional relationship with the compressed length a; The set threshold b is set as the spring compression amount when the train is half loaded; when the compressed length a is 0, the control device controls the tire pressure adjusting device to adjust the tire pressure of the rubber wheel (3) to the standard minimum value; when the compressed length a is equal to b, the control device controls the tire pressure adjusting device to adjust the tire pressure of the rubber wheel (3) to half of the sum of the standard minimum value and the standard maximum value. The bogie body (1) includes a rocking table (11) and a pair of side frames (12) symmetrically installed on both sides of the rocking table (11), and the side frames (12) are installed on the inner sides of the rubber wheel (3) and the steel wheel (4); the rocking table (11) includes a rocking bolster (111) and a spring tray (112) arranged below the rocking bolster (111), and the spring (113) is clamped between the spring tray (112) and the rocking bolster (111), and the spring (113) is symmetrically distributed at both ends of the spring tray (112) and the rocking bolster (111).

2. The railcar truck of claim 1 wherein: When the compressed length a reaches the maximum elastic limit of the spring (113), if in a straight road section, the control device controls the tire pressure adjusting device to adjust the tire pressure of the rubber wheel (3) to the standard maximum value; If in a slope road section, the control device controls the tire pressure adjusting device to adjust the tire pressure of the rubber wheel (3) to the standard minimum value.

3. The railcar truck of claim 1 wherein: The distance measuring instrument (114) is arranged on the side of the rocking bolster (111) close to the spring (113), and one end of the distance measuring instrument (114) is fixedly connected with the spring tray (112).

4. The railcar truck of claim 1 wherein: The bogie further includes a permanent magnet motor (5) and a current transformer (9) for monitoring the current size of the permanent magnet motor (5), the permanent magnet motor (5) includes a rotor assembly sleeved on the axle (2) and a stator assembly sleeved on the outer side of the rotor assembly, the stator assembly is fixedly connected with the rocking table (11), and the permanent magnet motor (5) is connected with an external power supply.

5. The railcar truck of claim 1 wherein: The steel wheel (4) is located on the inner side of the rubber wheel (3), and the tire pressure adjusting device is installed on the outer side of the rubber wheel (3).

6. The railcar truck of claim 4 wherein: The current transformer (9), the distance measuring instrument (114) and the tire pressure adjusting device are signal-connected through the control device.

7. The railcar truck of claim 4 wherein: The control device judges the running state of the train according to the current value transmitted by the current transformer (9), wherein the output current value of the train on a flat section is less than that on a slope section.

8. A track system matching the track bogie of any one of claims 1-7, characterized in that: The track comprises two parallel tracks one (7) and two parallel tracks two (8) located on the inner side of the tracks one (7), the tracks one (7) are matched with rubber wheels (3), and the tracks two (8) are matched with steel wheels (4); the tracks one (7) and the tracks two (8) are paved throughout.

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