JPH04243659A - Straddle type monorail truck - Google Patents

Abstract

PURPOSE:To enable a large straddle type monorail truck to travel on a curved track of a short radius at a slip angle 0(zero) by providing guide wheels at a two-axle truck and connecting parts for connecting truck frames, respectively provided at the intermediate part of the two-axle truck, in the laterally oscillating state, and making the fitting distance of the guide wheels to two-axle travel wheels approximately equal. CONSTITUTION:A frame 3A and a frame 3B are oscillatingly connected to each other by a center pin 4 inserted longitudinally into mutual connecting parts, and tires 2A, 2B travelling on the upper face of a track 1 are fitted to the frames 3A, 3B through reduction gears 8A, 8B. Guide wheels 11A, 11B, 11E, 11F are fitted to both sides of the frames 3A, 3B, and guide wheels 11C, 11D are fitted under the anchor links 6A, 6B of the frames 3A, 3B. In this case, the measure from the centers of the main travel tires 2A, 2B to the guide wheels 11A, 11B, 11E, 11F provided at the end parts of a truck is made approximately equal to the measure to the guide wheels 11C, 11D provided at the center of the truck.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straddle type monorail bogie with rubber wheels that travels within cities.

0003

2. Description of the Related Art Conventional straddle type monorail bogies equipped with rubber wheels include single-axle bogies and two-axle bogies, and most monorails use two-axle bogies. The reason for this is that single-shaft carts are inherently unstable and require considerable effort to hold and run stably, as well as the load they can bear is insufficient.

[0004] In contrast, two-axle trucks are inherently stable and therefore easier to construct. However, if one rubber tire is placed on two axles, the diameter will be large, so the space between the axles will become wider.

By the way, the life of a rubber tire is determined by the slip angle of the rubber tire (the angle at which the wheel actually runs with respect to the direction in which the wheel is facing), which greatly affects tire wear, and is proportional to the square of the slip angle. And, although the slip angle can be made quite small with a single-axle bogie,
A two-axle bogie cannot run on a curved line with a slip angle of zero for both axles, so a two-axle bogie cannot run on a curved track with a radius of 50 m or less.

[0006]

[Problem to be solved by the invention] However, in the new transportation routes (hereinafter referred to as new transportation) that have been adopted recently,
Many curved tracks with a radius of 30 m or less are adopted, and if it is possible to run on curved tracks with an even shorter radius, it can be applied to the streets of currently overcrowded cities, making it easier to construct new lines.

However, in the conventional two-axle bogie, even a track with a curved radius of 50 m between the two axle wheels fixed in parallel cannot be used due to the above-mentioned slip angle due to the life span of the tires.

[0008] Therefore, the object of the present invention is to provide a straddle type monorail bogie that allows even large bogies to run on curves with a small radius, allows construction of tracks even in existing urban areas, and allows vehicles to run. It's about getting. [Structure of the invention]

0
009]

[Means for Solving the Problems] One aspect of the present invention is to provide a straddle-type monorail two-shaft bogie with a connecting portion that connects the underframe of the two-shaft bogie horizontally in the middle of the two axles, A feature is that a pair of guide wheels is provided on the connecting portion and the two-shaft truck, and the mounting distances between the two-shaft main running wheels and the guide wheels are made equal.

[0010] The second aspect of the present invention is that in the straddle type monorail three-axle bogie, a bogie frame is provided for each of the three running wheels, a pair of guide wheels are provided on the bogie frame, and the bogie frames at both ends are provided with a bogie frame. It is characterized in that a connecting part is provided to horizontally swingably connect the frame and the intermediate truck frame, and the truck frames at both ends are connected by a link via a lever provided on the intermediate truck frame.

[0011]

[Operation] In the first invention, the two bogies are arranged in an articulated structure, and guide wheels are provided on the front and rear bogies and the central articulated part, and the mounting distances between the front and rear running wheels and the guide wheels are made equal. The slip angle of the wheels can be reduced to zero,
Even short radius curves can guarantee tire life.

Furthermore, in the second invention, the truck is divided into three axles corresponding to the three axles of running tires, three sets of guide wheels are attached to each truck, and the front and rear trucks of the intermediate truck are the same. By restraining the tires with links so as to bend at an angle, each running tire can run with a zero slip angle, and the life of the tires can be guaranteed even on curves with short radius.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a straddle type monorail two-shaft bogie of the first invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a view of A of FIG.
-A sectional view. 1 to 3, an underframe 3A having a substantially H-shape and an underframe 3B having an inverted H-shape in the plan view of FIG. ,
A main running tire 2A running on the upper surface of the track 1 is attached to an intermediate portion of the underframe 3A, and a main running tire 2B is attached to the underframe 3B via reduction gears 8A and 8B, respectively, which will be described later.

Further, a traction beam 5 is obliquely attached to the upper part of the center pin 4 as shown in FIGS. 1 and 3, and one end of anchor links 6A and 6B are connected to the left and right ends of this traction beam 5, respectively. The other ends of the anchor links 6A, 6B are connected to the lower ends of anchor receivers 17A, 17B shown in FIG.

Saddle beams 15A, 15B shown in FIG. 2 are further connected to the underframes 3A, 3B via a center pin 4 as shown in FIG. Main motors 7A and 7B are mounted on main motor receivers 20A and 20B, respectively, which are protruded from the main motor supports 20A and 20B. The output shafts of these main electric motors 7A, 7B are connected to the input shafts of reducers 8A, 8B fixed to the underframes 3A, 3B via joints (not shown). Connected to the drive shafts of the aforementioned main running tires 2A, 2B, reducers 8A,
Brake discs 9A and 9B are inserted into the output shaft of reducer 8B on the side surfaces of reducers 8A and 8B.
Calipers 10A and 10B that transmit braking force to disc brakes 9A and 9B are attached to cases A and 8B.

Furthermore, as shown in FIG. 2, an air spring 13A is fixed to the upper end of the saddle-shaped beam 15A, and an air spring 13B is fixed to the upper end of the saddle-shaped beam 15B. The upper surface is in contact with the floor of the vehicle body 14. On the other hand, at the lower end of the saddle beam 15A, as shown in FIGS. 2 and 3, a stable wheel 16A is placed in contact with the lower side of the track 1.
However, stabilizing wheels 16B are similarly attached to the lower ends of the saddle beams 15B.

Furthermore, on the right end of the underframe 3A as shown in FIG.
Similarly, in FIG. 1 of the underframe 3B, three solid tires 12B are attached to the middle part on the left end, and guide wheels 11E and 11F are attached to both sides, and in FIG. 1 of the underframe 3A, below the anchor link 6A, As shown in 2, the guide wheel 11C
However, in FIG. 1 of the underframe 3B, guide wheels 11D are attached below the anchor links 6B, as shown in FIG. 2, respectively. In addition, these guide tires 11A, 11B,
11C, 11D, 11E, 11F and the above-mentioned stable tire 1
6A and 16B are provided with solid tires (not shown) on the rims of each tire in order to ensure the safety of the vehicle in case of a puncture.

As shown in FIG. 3, the upper end of a cover 21 covering the entire bogie is fixed to the lower end of the car body 14, and the lower end of the track 1 is mounted on the upper surface of a pier 19 that stands up from the ground. A fixed bearing 18 is attached to form a monorail track connected to the track 1.

Next, the operation of the straddle type monorail two-shaft bogie of the first invention constructed as described above will be explained.

Since the two underframes 3A and 3B are connected to each other by the center pin 4, they can be bent in the horizontal plane, but cannot be moved relative to each other in other directions. Therefore, even if the load of the vehicle body is received by the air springs 13A, 13B, the main running tires 2A, 2B, or the solid tires 12A, 12B, the underframes 3A, 3B withstand these loads with high rigidity. Further, even if the stable wheels 16A and 16B receive a force in the rolling direction of the vehicle body, the vehicle body is stably supported like a general straddle type monorail bogie.

Furthermore, each of the main running tires 2A, 2B is driven via a main electric motor attached to the supported saddle beams 15A, 15B and reduction gears 8A, 8B attached to the underframes 3A, 3B. Braking is performed by the braking force applied to the brake discs 9A, 9B by the calipers 10A, 10B. These are the same as a general monorail bogie even if the underframes 3A and 3B are divided into two parts.

However, in contrast to the guide wheels 11A, 11B, 11E, and 11F provided at the ends of the cart, the guide wheels 11C and 11D are provided at the center of the cart, so if the cart enters a curved road, Guide wheel 11C in the center of the truck,
Guide wheels 11A, 11B and guide wheels 11E, 11F at the end of the bogie relative to the position of the side surface of the track 1 in contact with 11D.
For example, when traveling on a curved track with a radius of 30 m, the center guide wheels 11C and 11D move horizontally by 37 m.
．． 5mm deviation, and 22.5m on a 50m curved trajectory
Even if m is shifted, the two sets of underframes 3A and 3B swing around the center pin 4 and bend accordingly.

[0024] Here, guide wheels 11A, 11B, 11E, 11F from the center of the main running tires 2A, 2B to the ends of the truck
If the dimensions up to the guide wheels 11C and 11D at the center of the bogies are made almost equal to the dimensions up to the guide wheels 11C and 11D at the center of the bogies, these bogies will function as if two single-shaft bogies were connected by the center pin 4, and the main running tires 2A and 2B It runs on curved tracks with almost zero slip angle, and can run on curves with a radius of 30 m or less without any problems.

On the other hand, as described above, the anchor links 6A and 6B, one end of which is connected to the left and right ends of the traction beam 5 connected to the center pin 4 at the center, and the other ends of the anchor links 6A and 6B are connected to anchor receivers vertically provided on the underside of the vehicle body. 17A, 17B, and by tilting the anchor links 6A, 6B in the vertical direction,
By allowing vertical displacement of the air springs 13A, 13B and swinging the anchor links 6A, 6B in the left-right direction,
Allows for lateral displacement of air springs 13A, 13B.

In this way, by making the underframes 3A, 3B bendable in the lateral direction at the central joint, and by arranging guide wheels at the ends of the truck and at the center of the truck, the main running tires 2A, 2B are It is now possible to drive in curves with an extremely small slip angle, and radius 3 is the minimum curve radius specified for new transportation.
This is a straddle type monorail two-axle bogie that can easily travel on curves of 0m.

[0027] In the above embodiment, the main running tire 2A
, 2B, the end guide wheels 11A, 11B, 11
Distance to E, 11F and guide wheel 11C, 1 in the center of the trolley
As explained in the case where the distances to 1D are made equal, the deflection due to the contact pressure between the guide wheels 11A, 11B, 11E, 11F and the track 1, and the self-alignment of the running tires 2A, 2B in which the tires automatically turn in the direction of travel. Considering torque etc., the front and rear guide wheels 11A, 11B, 11E, 11F
may be slightly shifted from the center to provide better driving characteristics.

Next, FIG. 4 shows another embodiment in which the core plate structure that connects the vehicle bogies is replaced with another one. In this case, the left underframe 3D in the figure is not much different from the underframe 3B in FIG. 1, but the right underframe 3C is provided with an oblong center plate hole 23 near the center pin 4, The left and right ends of the core plate metal fitting 22 are held by a pair of rubber seats for the core plate provided respectively in the core plate rubber seats 24, and the rubber seats 24 for the core plate are bent to allow vertical and horizontal displacement of the air springs 13A and 13B, and In the longitudinal direction, a core plate shaft 25 that hangs down from the vehicle body (not shown) is fitted in the center of the core plate metal fitting 22 so that the traction force and braking force generated by the truck can be transmitted to the vehicle body. In this case, the core plate shaft 2
5 is positioned slightly offset from the center pin 4 at the center of the cart, but its function as a cart remains the same.

In addition, in the figure, an oil damper 26 is installed in the longitudinal direction between the underframes 3C and 3D next to the center pin 4 to prevent swinging vibration when traveling on a straight road at high speed. There is.

As a result, according to the present invention, although it is essentially a two-shaft truck, it has exactly the same function as a two-shaft truck with two guide wheels on each shaft, Since it can easily travel on steep curves with a radius of 30m or less, which is the goal of new transportation, it can also travel above narrow streets in cities where conventional straddle-type monorail bogies could not travel, expanding the range of application. This makes it a straddle-type monorail two-axle bogie that can be easily installed on new lines.

Next, an embodiment of the second invention will be described with reference to FIG. 6 which shows a plan view of FIG. 5 and a front view of FIG. 5.

In FIGS. 5 and 6, the substantially round-shaped underframes 33A, 33B, and 33C in FIG.
B, each underframe 33A is connected so as to be swingable in the swivel direction.
, 33B, 33C have main running tires 32A, 32
B and 32C are attached respectively.

The center portion of a traction beam 35 is engaged with the center pin 34B, and an anchor link 36 is attached to one end of the traction beam 35.
One side of the anchor link 36B is connected to the other end of the traction beam 35, and the other side of the anchor link 36A is the lower end of the anchor link receiver 17A shown in FIG. The other side of the anchor link 36B is connected to the lower end of an anchor link receiver 17B, which is also vertically installed at the lower part of the vehicle body 14.

Main motor receivers 50A, 50B are attached to the outer sides of the front and rear bogie underframes 33A, 33C, and main motors 7A, 7B are mounted on the main motor receivers 50A, 50B. The output shaft of 7B is connected via a coupling to the input shafts of reducers 8A and 8B, which are also attached to the center sides of the bogie underframes 33A and 33C, and one side of the output shaft of these reducers 8A and 8B is connected to the main drive shaft. It is connected to tires 32A and 32C. On the other hand, reducer 8A,
Brake discs 9A, 9B are fitted and fixed on the other side of the output shaft of 8B, and calipers 10A, 10A, which apply braking force to the brake discs 9A, 9B are attached to the cases of the reducers 8A, 8B.
10B is attached.

On both sides of each bogie frame 33A, 33B, 33C, guide wheels 11A, 11B, 11C, 11D, 11E, are provided almost directly below each running tire 32A, 32B, 32C.
11F is attached in contact with the upper side of track 1,
Saddle-shaped beams 48A, 48B are attached symmetrically to the left and right sides of the bogie underframe 33B, and stabilizing wheels 16A, 16B are attached to the lower ends of the saddle-shaped beams 48A, 48B.
The upper ends of A, 48B are bent sideways to form air spring receivers 51A, 5.
Air springs 13A, 13B are fixed to the upper surfaces of the air spring receivers 51A, 51B, and the upper surfaces of the air spring receivers 13A, 13B are in contact with the floor of the vehicle body 14.

Furthermore, fixing pins 4 are provided on both sides of the bogie frame 33B.
2A and 42B are installed vertically, and this fixing pin 42A
, 42B, the central parts of the levers 43A, 43B are engaged,
Links 44B,
One side of the link 44D is connected, and the other side of the link 44B, 44D is the main motor receiver 50A, 5 of the bogie underframe 33A, 33C.
0C, one side of links 44A, 44C is connected to the outer ends of levers 43A, 43B, and this link 4
The other sides 4A and 44C are connected to the corners of the truck underframes 33A and 33C.

In the bogie constructed in this way, the main running tires 32A, 32C are driven by the main electric motors 7A, 7B via the reducers 8A, 8B, and the load of the vehicle body 14 is first applied to the bogie frame 33B. It is also shared by the bogie underframes 33A, 33C via center pins 34A, 34B. Next, the operation of the second invention will be explained. First, the movement of the cart will be explained with reference to FIG.

[0038] Now, the car body enters the curved track and guide wheel 1
When 1A and 11B move towards you in the same figure, the center pin 3
Bogie frame 3 connected to central bogie frame 33B at 4A
3A swings clockwise in the figure around the center pin 34A. Then, the link 44B swings to the right and the link 44C swings to the left, the lever 43A swings counterclockwise around the fixed pin 42A, and the lever 43B swings clockwise around the fixed pin 42B. Link 44A is on the left Link 44D
moves to the right, so the trolley frame 33C is attached to the center pin 34B.
As a result, the bogie frame 33A is swung counterclockwise around the axis.
When the carriage frame 33B swings clockwise by a certain angle, the carriage frame 33C swings counterclockwise relative to the carriage frame 33B by the same angle. Next, FIG. 7 is an explanatory diagram showing a situation when the straddle type monorail three-axle bogie of the second invention runs on a curve. In the same figure, the trolley has a complete radius R.
when the guide wheel 11A is on the curved trajectory.
, 11B, 11C, 11D, 11E, and 11F are in contact with the side surface of the track.

In the figure, points B and D are the center pin 34.
Indicate the positions of A and 34B, and now, if ∠ABF and ∠GDE are constrained to the same angle, that is, 2α, ∠0CB will be a right angle, and ∠BA0 and ∠DE0 will both be right angles. . In other words,
Points A, C, and E are the main running tires 32A and 32B, respectively.
, 32C, and it can be seen that they are all oriented in the tangential direction of the orbit, that is, in the direction of zero slip angle.

The stability of the vehicle body 14 in the rolling direction is determined by stable wheels 16A, 16B and guide wheels 11C, 1 attached to the bogie 33B via saddle beams 48A, 48B.
It is secured by a combination of 1D.

[0041] Also, main running tires 32A, 32B, 32C
Although only the main running tires 32A and 32C are driven, the main running tires 32B may also be provided with a drive unit.

As described above, according to the straddle type monorail three-axle bogie of the second invention, a center pin for connecting each bogie is provided at the intermediate position between each main running tire for each bogie, and the front and rear bogies are connected to each other. By ensuring that the frame swings symmetrically by the same angle and by placing guide wheels directly below and beside each main running tire, each main running tire can run with a slip angle close to zero even on steep curves. .

FIG. 8 shows another embodiment of the second invention,
In Fig. 7, under the condition that the relationship of line segment AB = line segment BC = line segment CD = line segment DE is established, if we constrain it so that ∠FBA = ∠GDE = 2α, then the main points at points A, C, and E While we have shown that the running tire faces in the tangential direction of the curve, in Figure 8, the center pin position is shifted from the middle of the main running tire as shown in line segment IJ = line segment LM ≠ line segment JK = line segment KL. FIG. 2 is an explanatory diagram showing the traveling situation of the monorail bogie when

In this case as well, ∠IJP=∠ML
Keeping Q, guide wheels 11a, 11b; 11c, 11d
;If the center points of 11e and 11f are made to coincide with the center line of the track, in order for the main running tire to face in the tangential direction of the track, the center of the main running tire and the center of the track will not match, but the point The positions of point I, point M, and point K are sufficient.

Next, FIGS. 9 and 10 show the link 4 shown in FIG.
4A, 44B, 44C, and 44D, an example of a spring mechanism is shown that is installed at one location between each of the left and right link systems, and the compression spring 56 is held down by the seat plate 55, and the housing is attached to the collars 53 and 54. By making the end of the rod 52 expandable and retractable inside the link 57, the link length does not change until a force of +A or -A is applied, as shown in FIG. When this happens, the link length changes.

[0046] By incorporating such a link, even if the guide wheels move up and down due to irregularities on the track, all the bogies do not have to respond immediately, so the stability of the bogie while it is running can be increased. .

As described above, the main running tires of the three axles are each held by a bogie frame, and when one bogie swings clockwise with respect to the middle bogie frame, the other bogie rotates counterclockwise at the same angle. By connecting them with a link/lever mechanism that restrains them from swinging, and by providing guide wheels on each bogie frame, we are able to orient the main tires on a curved road in the tangential direction of the curve. It can travel on curves, and can easily travel on curved roads that conventional straddle-type monorail bogies cannot travel on.

[0048]

[Effects of the Invention] As described above, according to the first invention, in the straddle type monorail two-shaft bogie, a connecting portion is provided between the two axles to connect the underframe of the two-shaft bogie in a horizontally swingable manner. By providing a pair of guide wheels on the connecting part and the two-axle bogie, and making the installation distance between the two-axle main running wheel and the guide wheel equal, the main running wheel can be curved in the same way as when two single-axle bogies are connected. However, since we have made it possible to run with a zero slip angle, we can obtain a straddle type monorail two-axle bogie that can run on small radius curves even with large bogies.

According to the second invention, in the straddle type monorail three-axle bogie, a bogie underframe is provided for each of the three running wheels, a pair of guide wheels are provided on the bogie frame, and the bogies at both ends are provided with a bogie frame. A connecting part is provided in the adjacent part of the underframe and the middle bogie underframe to connect the bogie underframes at both ends and the middle bogie underframe in a horizontally swingable manner. The straddle-type monorail three-axle bogie is connected by a link via a freely movable lever, so even large bogies can run on small-radius curves, and the monorail can run on existing urban areas. can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a straddle type monorail two-shaft bogie of the first invention.

FIG. 2 is a front view of FIG. 1.

FIG. 3 is a sectional view taken along line AA in FIG. 1;

FIG. 4 is a plan view showing another embodiment of the straddle type monorail two-shaft bogie of the first invention.

FIG. 5 is a plan view showing an embodiment of the straddle type monorail three-shaft bogie of the second invention.

FIG. 6 is a front view of FIG. 5.

FIG. 7 is an explanatory diagram showing the operation of the straddle type monorail three-shaft bogie of the second invention.

FIG. 8 is an explanatory diagram showing another embodiment of the straddle type monorail three-axle bogie of the second invention.

FIG. 9 is a cross-sectional view of a main part showing another different embodiment of the straddle type monorail triaxial bogie of the second invention.

FIG. 10 is an explanatory diagram showing the operation of another different embodiment of the straddle type monorail three-shaft bogie of the second invention.

[Explanation of symbols]

2A, 2B...Main running tires, 3A, 3B, 33A, 33
B, 33C...Underframe, 4,34A,34B...Center pin, 1
1A, 11B, 11C, 11D, 11E, 11F, 16
A, 16B...Guide wheel, 43A, 43B...Lever, 44
A, 44B, 44C, 44D...link.

Claims (2)

[Claims] [Claim 1] In a straddle type monorail two-axle bogie,
A connecting part for horizontally swingingly connecting the underframe of the two-shaft truck is provided between the two shafts, a pair of guide wheels is provided on the connecting part and the two-shaft truck, and a main running wheel of the two-shaft truck is provided. A straddle type monorail two-axle bogie, characterized in that the mounting distances between the guide wheel and the guide wheel are equal. [Claim 2] In a straddle type monorail three-axle bogie,
A bogie frame is provided for each of the three running wheels, a pair of guide wheels are provided on each of the bogie frames, and the bogie frames at both ends and the middle bogie frame are connected to adjacent portions of the bogie frames at both ends and the middle bogie frame. A connecting portion is provided to connect the bogie underframes horizontally so as to be swingable, and the bogie underframes at both ends are connected to the middle dolly underframe via a lever swingably provided by a link. A straddle-type monorail three-axle bogie.