JP2000071983A - Low-floor tram trolley - Google Patents

Abstract

(57) [Problem] To provide a cart for a low-floor tram, which is short in the front-rear direction, has a simple structure, and can secure getting on and off. SOLUTION: Wheels 2A and 2B are directly rotated by main motors 3A and 3B. Rubber springs 11A, 11B, 12A, and 12B are provided between the vehicle bodies and the spring receiving portions 9A, 9B, 10A, and 10B provided on the main motors 3A and 3B. The spring receiving portions 9A, 9B, the bracket on the vehicle body side, the outer frames of the main motors 3A, 3B and another bracket on the vehicle body side are connected by rod members 13A, 13B, 14A, 14B. Left and right spring receiving portions 9A, 9B and 10A, 10
B is connected by connecting beam members 15A and 15B. The connecting beam members 15A and 15B are located below the center axis of the wheels 2A and 2B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bogie used for a low-floor tram.

[0002]

2. Description of the Related Art In recent years, trams have been reviewed as an alternative to transportation such as buses due to global warming and other reasons. In such a tram,
At present, the number of steps is usually two steps (two steps). However, since it is expected that elderly people will increase in number of users, in order to improve getting on and off, non-stepping steps for getting on and off The height is the same as the height of the stop above the platform (platform), that is, 30-35 on the road surface.
cm. In this way, when the tram is stopped at the stop, the height of the stop from the platform and the height of the entrance / exit are almost equal, and the user does not feel the difference in elevation and the burden of getting on and off is eliminated. Because it is possible.

[0003] By the way, on such a road surface 30-35c
In order to achieve a low floor type of about m, there is a possibility that the floor surface and the components of the bogie, such as wheels, axles, and the main motor, may interfere with each other. Here, the arrangement of the wheels cannot be changed. However, by considering the arrangement of the main motor, it is possible to avoid interference with the floor when the floor is lowered. On the other hand, the only way to avoid interference with the axle is to eliminate the axle itself, so it is necessary to consider a structure that eliminates the axle.

As a truck for a low-floor tram without such an axle, for example, as shown in FIG. 9, a main motor 102 is provided on a lower surface of a vehicle body (not shown) supported by a truck 101, and the main motor 102 is provided. There is known a motor that transmits power from a gear box 102 to a left gear box 104A via a spline shaft 103 (propulsion shaft) and from the gear box 104A to a right gear box 104B via a torsion shaft 105. .

[0005]

However, in the above-described structure, since the main motor 102 is attached to the vehicle body (not shown) at the rear position, it becomes longer in the front-rear direction, which is disadvantageous for downsizing. Gear box 10
Since the 4A and 104B are connected by the torsion shaft 105, there is a problem that the structure becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a low-floor tram bogie that is short in the front-rear direction, has a simple structure, and can secure getting on and off.

[0007]

According to a first aspect of the present invention, there is provided a low-floor tram bogie having wheels provided corresponding to left and right and spring means provided between the wheels and the vehicle body. A left and right main motor provided between the wheel and the spring means for directly driving the wheel, and a rotation provided between the main motor and the vehicle body to regulate a relative rotation between the vehicle body and the main motor. It comprises a regulating member and a connecting beam member located below the central axis of the left and right wheels and connecting the left and right main motors. Here, as the spring means,
A rubber spring, an air spring, or the like is used.

According to the first aspect of the present invention, the wheels are directly driven to rotate by the main motor, and the rotation speed of the wheels is directly controlled by controlling the rotation speed of the main motor. The structure is simpler than that driven by one motor using a gear box. Also,
The connecting beam member connecting the left and right main motors is located below the center axis of the left and right wheels, eliminating the axle,
Low floor is realized. In addition, noise can be reduced as compared with the conventional speed control using a gear box.

According to a second aspect of the present invention, in the cart for a low floor tram according to the first aspect, the spring means is provided between a spring receiving portion provided on the main motor side and the spring receiving portion and the vehicle body. A spring member provided in the, the rotation regulating member,
It is a rod member for connecting between the main motor or the spring receiving portion and the vehicle body.

According to the second aspect of the present invention, the spring member is provided between the spring receiving portion on the main motor side and the vehicle body, and the connection between the wheel and the vehicle body is made elastic. In addition, a rod member (rotation restricting member) is provided between the main motor or the spring receiving portion and the support portion, and the relative rotation between the main motor and the vehicle body is restricted by a simple structure.

According to a third aspect of the present invention, in the low floor tram cart of the first or second aspect, the left and right wheels are respectively arranged in a pair in front and rear, and the front and rear wheels are directly connected to each other. The main motors before and after driving are connected by a connecting beam member extending in the front-rear direction.

According to the third aspect of the present invention, the front and rear main motors for directly driving the front and rear wheels are connected by a connecting beam member extending in the front and rear direction, and a wheel-to-wheel distance of a predetermined value or more is secured. Thus, the stepping force is increased.

According to a fourth aspect of the present invention, in the cart for a low-floor tram according to the first aspect, the connecting beam member connects the left and right main motors by connecting the left and right connecting beam members.

According to the fourth aspect of the present invention, the left and right connecting beam members for connecting the front and rear main motors are connected by the connecting beam member extending in the left and right direction, and the space (dead space) generated in the front and rear direction by the connecting beam member. The connecting beam member is applied by effectively utilizing the space, and the compactness in the front-rear direction is achieved.

According to a fifth aspect of the present invention, there is provided a low-floor tram, wherein a pair of left and right wheels are provided correspondingly front and rear, and one of the front and rear wheels is connected to the left and right wheels. Bearing means rotatably supported and used as driven wheels, a main motor for rotating the other wheel via a gear box, spring means provided between the bearing means or the main motor and the vehicle body, And a connecting beam member located below the center axis of the left and right wheels.

According to the fifth aspect of the present invention, the bearing means, the gear box and the main motor are arranged on the left and right, and the left and right main motors are connected by the connecting beam members located below the center axes of the left and right wheels. The bearing means, the gear box, and the main motor are effectively used as strength members that are connected to each other, and a low floor is achieved while maintaining a certain strength without being adversely affected by eliminating the axle. .

According to a sixth aspect of the present invention, in the cart for a low-floor tram according to the fifth aspect, the main motor is provided between the bearing means and the gear box and is connected thereto. .

According to the sixth aspect of the present invention, the main motor is provided between the bearing means and the gear box, they are interconnected, and the bearing means, the gear box and the main motor have a certain strength. It can function as a beam.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, in principle, the reference numeral of the component located on the left side is denoted by A, and the reference numeral of the component located on the right side is denoted by B. <First Embodiment> FIG. 1 is a schematic plan view of a low-floor tram for a first embodiment according to the present invention, and FIG. 2 is a schematic side view thereof.

In FIG. 1 and FIG. 2, a low-floor tram cart 1 is a uniaxial type and has wheels 2A and 2B provided to correspond to the left and right so as to be coaxial. ,
The rotating shafts 3a of the left and right main motors 3A and 3B (inner rotor type direct drive motors) are press-fitted into 2B, respectively. Therefore, the left and right wheels 2A, 2B are driven by the main motor 3 synchronously rotated by control means (not shown).
A and 3B are directly driven to rotate. An inverter motor or the like is used as the main motors 3A and 3B.

The main motors 3A and 3B are connected to the vehicle body 4 via spring means 6A and 6B, respectively.
A, 2B are located outside. The spring means 6A, 6A
Since B is formed symmetrically and has basically the same structure, only the spring means 6A will be described below, and the description of the spring means 6B will be omitted unless necessary.

The spring means 6A is, as shown in FIG.
First and second brackets 7A, 8A provided on the vehicle body 4 and protruding downward, and the main motors 3A, 3B provided corresponding to the first and second brackets 7A, 8B.
, First and second spring receiving portions 9A, 10A protruding forward and backward from outer frames 3b, 3b, and first and second brackets 7A, 8A and first and second spring receiving portions 9A, 9A,
10A and first and second rubber springs 11A and 12A that receive a vertical load and are attached and fixed in the vertical direction by fixing means (for example, bolts) not shown.

The tip of the first spring receiving portion 9A and the first
Between the lower end of the lower protruding portion 7a of the bracket 7A,
They are connected by a first rod member 13A extending horizontally in the front-rear direction. Also, between the intermediate portion of the second bracket 8A and the mounting portion 3b provided on the rear upper portion of the outer frame 3b of the main motor 3A, the second rod member 14A extending horizontally in the front-rear direction similarly applies. It is connected to. When the main motor 3A is rotationally driven for power transmission by the rod members 13A and 14A, the main motor 3A
The relative rotation between the vehicle A and the vehicle body 4 is restricted, and the bogie 1 is prevented from rotating and pitching with respect to the vehicle body 4.

The spring receiving portions 9A and 10A are connected to the opposite spring receiving portions 9B and 10B via connecting beam members 15A and 15B extending in the left-right direction, and are provided between the left and right wheels 2A and 2B. The distance is kept constant. These connecting beam members 15A and 15B are configured so as to be located as much as possible lower than the center axis of the left and right wheels 2A and 2B from the viewpoint of lowering the floor.

The right spring members 11B and 12B correspond to the left spring members 11A and 12A, and the right rod members 13A and 14A correspond to the left rod members 13A and 14A.
B and 14B are provided respectively. As shown by broken lines in FIG. 1, tether type brake means 17A, 17B can be provided on the connecting beam members 15, 16 so as to face the peripheral surfaces of the wheels 2A, 2B.

With the above structure, the wheels 2A, 2B
Are directly driven to rotate by the main motors 3A and 3B, respectively, and the rotation speeds of the wheels 2A and 2B are directly controlled by controlling the rotation speeds of the main motors 3A and 3B. Therefore, compared to the conventional case in which speed control is performed using a gear box, noise caused by the gear box can be eliminated, and noise can be reduced.
In addition, connecting beam members 15 and 16 interconnecting the left and right spring receiving portions 9A, 9B, 10A and 10B supporting the main motors 3A and 3B with respect to the vehicle body 4 are connected to the left and right wheels 2A and 2B. Because it is located below the central axis,
The floor can be made lower than in the conventional structure having an axle. Therefore, the axle is eliminated and the floor is reduced.

In the first embodiment, the left and right wheels are
Although a description has been given of the case where the number is two, it is also possible to use two at a time as in the second embodiment described below. <Second Embodiment> FIG. 3 is a schematic plan view of a truck for a low-floor tram according to a second embodiment of the present invention, and FIG. 4 is a schematic side view thereof.

Referring to FIGS. 3 and 4, a low-floor tram 21 has wheels 22A, 23A, 22B, and 23B provided coaxially with the left and right wheels. 22A, 23A, 22B, and 23B have left and right main motors 24A, 25A, 24B, and 25B, respectively.
Rotating shafts 24a, 25a, 24a, 25a of (inner rotor type direct drive motor) are press-fitted.
Therefore, the left and right wheels 22A, 23A, 22B, 23B
Are directly driven to rotate by main motors 24A, 25A, 24B, 25B synchronously rotated by control means (not shown).

The main motors 24A and 25A and 2
4B and 25B are mutually connected by connecting beam members 26A and 26B extending in the front-rear direction, respectively, and are located outside the respective wheels 22A, 23A, 22B and 23B. The main motors 24A, 25A, 24B, 2
5B are spring means 28A and 29
A, 28B, and 29B, and the spring means 28
Since A, 29A and 28B, 29B are formed symmetrically and basically have the same structure, only the spring means 28A, 29A will be described below. Unless necessary, the spring means 28B, 29B will be described. Is omitted.

As shown in FIG. 4, the spring means 28A, 29A are provided on the vehicle body 27 side and are provided with brackets 30A, 31A protruding downward, and the main motors 24A, 25A outer frame 2
Spring receiving portions 32A, 3 projecting forward and backward from 4b, 25b
3A, the brackets 30A, 31A and the spring receiving portion 3
Rubber springs 34A, 35 provided between 2A and 33A
A, and spring receiving portions 32A and 33A and rubber springs 34 by fixing means (for example, bolts) (not shown).
A and 35A are attached and fixed to the bottom surface of the vehicle body 27.

A mounting portion 24c is projected from the rear upper portion of the outer frame 24b of the main motor 24A, and a bracket 36A is projected downward from the vehicle body 27 at a position rearward of the mounting portion 24c. With the bracket 36A,
It is connected by a rod member 37A extending horizontally in the front-rear direction, so that relative rotation between the main motors 24A, 25A and the vehicle body 27 is avoided.

The left and right spring receiving portions 32A, 32B,
33A and 33B are mutually connected by connecting beam members 38 and 39 extending in the left-right direction. The connecting beam members 38, 39 are connected to the left and right wheels 22A, 22B, 23A,
It is configured to be located below the central axis of 23B, and will be located below the so-called axle,
This is advantageous for lowering the floor.

Incidentally, spring means 28B and 29B are provided on the right side corresponding to the left spring means 28A and 29A, and a rod member 37B is provided on the right side corresponding to the left rod member 37A. Further, similarly to the first embodiment, the connecting beams 38, 39 have the wheels 22A, 23A,
It goes without saying that brake means can be provided opposite to 22B and 23B.

In the second embodiment, two connecting beam members are provided at the front and rear, but it is also possible to use one connecting beam as in a third embodiment described below. . <Third Embodiment> FIG. 5 is a schematic plan view of a low-floor tram for a third embodiment according to the present invention, and FIG. 6 is a schematic side view thereof. Note that the same components as those in the second embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 5 and 6, in the present embodiment, the main motors 24A, 25A, 24B, 25
Spring receiving portions 24d, 25d, 24d, 25d are formed on the upper portions of the outer frames 24b, 25b, 24b, 25b of B,
The spring receiving portions 24d, 25d, 24d, 25d and the vehicle body 2
Rubber springs 28A, 29A, 28B, and 29B are provided between the front and rear wheels 7 and 7, which reduces the space required in the front-rear direction and is advantageous in achieving compactness.

The connecting beam member 40 has a rectangular cross section and connects the lower surfaces of the left and right connecting beam members 26A and 26B to each other.

In the second and third embodiments, the wheels are driven directly by the main motor. However, as in the fourth embodiment, the wheels are driven to rotate via a gear box. It is also possible to <Fourth Embodiment> FIG. 7 is a schematic plan view of a truck for a low-floor tram according to a third embodiment of the present invention, and FIG. 8 is a schematic side view thereof.

As shown in FIG. 7 and FIG.
On the left and right sides, front wheels 52A and 52B are driven to rotate by normal main motors 56A and 56B for each side via gear boxes 54A and 54B, and rear wheels 57A and 52B.
57B is rotatably supported via bearing boxes 58A and 58B (bearing means).

Each of the gear boxes 54A and 54B has a pair of bevel gears 54a and 54b, respectively, and the transmission direction of the power is changed by 90 ° by meshing the gears. That is, gear boxes 54A, 54B are provided outside the front wheels 52A, 52B, main motors 56A, 56B are connected behind the gear boxes 54A, 54B, and a bearing box 58 is provided behind the main motors 56A, 56B.
A and 58B are provided continuously.

A spring receiving portion (only left-side spring receiving portions 59A and 60A are shown) is formed on the upper surfaces of the gear boxes 54A and 54B and the bearing boxes 58A and 58B. Rubber springs 62A, 63
A, 62B and 63B are provided. At the same time, the outer frames 56a, 56a of the main motors 56A, 56B are provided with protrusions 56b, 56b projecting upward, and a bracket projecting downward from the vehicle body 61 at a position rearward (only the left bracket 64A is shown). ) Are provided, and these are rod members 65A, 6A extending in the front-rear direction.
5B, the vehicle body 61 and the main motors 56A, 56B
And restrict the relative rotation between them.

Further, the connecting beam member 66 connects the lower portions of the outer frames 56a, 56a of the left and right main motors 56A, 56B to each other, which is advantageous for lowering the floor.

[0042]

The present invention is embodied in the form described above, and has the following effects.

According to the first aspect of the present invention, the rotation speed of the wheels is directly controlled by controlling the rotation speed of the main motor by directly rotating the wheels by the main motor. The structure is simpler than that driven by a single motor by using. In addition, since the connecting beam member connecting the left and right main motors is located below the center axis of the left and right wheels, the axle is eliminated, thereby realizing a low floor and securing getting on and off. Becomes possible. In addition, it is advantageous in terms of noise reduction as compared with the conventional one in which speed control is performed using a gear box.

According to the second aspect of the present invention, since the spring member is provided between the spring receiving portion on the main motor side and the vehicle body, the wheels and the vehicle body can be elastically connected, and the transmission of vibration and the like can be performed. Can be prevented. Further, since the rod member (rotation restricting member) is provided between the main motor or the spring receiving portion and the support portion, the relative rotation between the main motor and the vehicle body can be reliably restricted by a simple structure.

According to the third aspect of the present invention, the front and rear main motors for directly driving the front and rear wheels are connected to each other by the connecting beam members extending in the front and rear direction. As a result, it is possible to increase the stepping force.

According to a fourth aspect of the present invention, the left and right connecting beam members for connecting the front and rear main motors are connected to each other by the connecting beam member extending in the left-right direction. A connecting beam member can be applied using a space (dead space) generated in the front-rear direction,
This is advantageous for downsizing in the front-rear direction.

According to a fifth aspect of the present invention, the bearing means, the gear box and the main motor are arranged on the left and right, and the left and right main motors are mutually connected by a connecting beam member located below the center axis of the left and right wheels. Because it is connected, the bearing means, the gear box and the main motor are effectively used as strength members, while maintaining a certain strength, without being adversely affected by eliminating the axle, and lowering the floor. Can be planned.

According to the sixth aspect of the present invention, since the main motor is provided between the bearing means and the gear box and they are interconnected, the bearing means, the gear box and the main motor can be provided with a certain strength. It can function as a side beam.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a cart for a low-floor tram according to a first embodiment of the present invention.

FIG. 2 is a schematic side view of the same.

FIG. 3 is a schematic plan view of a cart for a low-floor tram according to a second embodiment of the present invention.

FIG. 4 is a schematic side view of the same.

FIG. 5 is a schematic plan view of a truck for a low-floor tram according to a third embodiment of the present invention.

FIG. 6 is a schematic side view of the same.

FIG. 7 is a schematic plan view of a cart for a low-floor tram according to a fourth embodiment of the present invention.

FIG. 8 is a schematic side view of the same.

FIG. 9 is a perspective view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Low floor tram cart 2A, 2B Wheel 3A, 3B Main motor 3a Rotating shaft 3b Outer frame 4 Body 6A, 6B Spring means 9A, 9B, 10A, 10B Spring receiving part 11A, 12A Rubber spring 13A, 14A Rod member 15 , 16 connecting beam member 21 cart for low floor tram 22A, 22B, 23A, 23B wheel 24A, 24B, 25A, 25B main motor 24a, 25a rotating shaft 24b, 25b outer frame 24d spring receiving portion 26A, 26B connecting beam member 27 vehicle body 28A, 28B, 29A, 29B spring means 32A, 32B, 33A, 33B spring receiving portion 34A, 34B, 35A, 35B rubber spring 37A rod member 38, 39, 40 connecting beam member 51 low floor tram bogie 52A 52B Front wheel 54A, 54B Gear box 56A, 56B Main electric Machine 56a Outer frame 57A, 57B Rear wheel 58A, 58B Bearing box 59A, 60A Spring receiving portion 62A, 62B, 63A, 63B Rubber spring 65A, 65B Rod member 66 Connecting beam member

Continued on the front page (72) Inventor Akira Kawamoto 2-1-1-18 Wadayama-dori, Hyogo-ku, Kobe-shi, Hyogo

Claims (6)

[Claims] 1. A low-floor tram car having wheels provided corresponding to left and right and spring means provided between the wheels and the vehicle body, wherein the truck is provided between the wheels and the spring means. Left and right main motors for directly driving the wheels, a rotation restricting member provided between the main motor and the vehicle body for restricting relative rotation between the vehicle body and the main motor, and a center axis of the left and right wheels. A low-floor tram trolley, comprising: a connecting beam member located below the connecting member and connecting the left and right main motors. 2. The spring means includes: a spring receiving portion provided on the main motor side; and a spring member provided between the spring receiving portion and a vehicle body. 2. A rod member for connecting an electric motor or a spring receiving portion to a vehicle body.
The low floor tram trolley as described. 3. The vehicle according to claim 1, wherein each of the left and right wheels is
The low-floor tram according to claim 1 or 2, wherein the front and rear main motors that directly drive the front and rear wheels, respectively, are connected by a connecting beam member extending in the front and rear direction. Trolley. 4. The low floor tram bogie according to claim 3, wherein the connecting beam member connects the left and right main motors by connecting the left and right connecting beam members. 5. A pair of left and right wheels correspondingly provided in front and rear, bearing means for rotatably supporting one of the front and rear wheels of the left and right wheels to be a driven wheel, and A main motor for rotating the wheels via a gear box, a spring means provided between the bearing means or the main motor and the vehicle body, and the left and right main motors connected to a lower side of the center axis of the left and right wheels; A low-floor tram trolley comprising: 6. The cart for a low-floor tram according to claim 5, wherein the main motor is provided between the bearing means and the gear box and connects them.