JPH041014Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric traction vehicle that is equipped with first and second electric motors and is capable of running at extremely low speeds.

[Conventional technology]

2. Description of the Related Art Electric towing vehicles using electric motors are often used for towing vehicles or replacing vehicles. However, in such electric traction vehicles, the speed was variable only by electrical control using one type of electric motor, and the low speed control was limited to about 1/10 to 1/15 of the normal speed.

On the other hand, when washing a vehicle, for example, the vehicle is operated at a very low speed of about 2 to 4 meters per minute, and the normal speed is 20 to 30 km/h, that is, the low speed control is 1/80 to 1/ of the normal speed. 250 is required. However, in conventional electric towing vehicles, the electric motor must also be rotated at a low speed as described above, which is impossible with electrical control alone, and therefore cannot be used for such purposes. Note that even when the towed vehicle itself is a train equipped with an electric motor, it cannot run at ultra-low speeds by itself. Therefore, in order to drive a vehicle at extremely low speeds for car washing or the like, conventionally, the vehicle has been towed using a winding device including a rope wound around a winding drum.

[Problem that the invention attempts to solve]

Therefore, in order to run at ultra-low speeds, such a winding device must be installed separately, which complicates car washing equipment and the like. Unable to drive at low speed. Therefore, a winding device or the like must be installed at each location or the winding device must be moved, which requires a lot of effort for the vehicle to run at extremely low speeds.

The present invention is based on the provision of a first electric motor and a second electric motor attached to a reduction gear, and allows the vehicle to run at very low speeds in addition to normal driving.
The object of the present invention is to provide an electric traction vehicle that can solve the above problems and expand its range of use and applications.

[Means for solving problems]

Hereinafter, one embodiment of the means of the present invention that can achieve the above-mentioned objects and solve the problems will be described with reference to the drawings.

In the figure, an electric traction vehicle 1 has a drive device 6 in which a double-shaft first electric motor 2 and a reduction gear 4 driven by a second electric motor 3 are connected via a clutch 5.
The first electric motor 2 is connected to a driving wheel shaft 9 by gear means 7.

In this example, the electric traction vehicle 1 is shaped like a battery-type locomotive, with a driver's cab 12 in the center of the upper surface of a vertically long bogie 11, and power supply sections 13, 13 for storing batteries on both sides thereof. 2 with wheel sets 9,9
It is formed as an axle, and the drive devices 6, 6 are disposed on each driving wheel shaft 9, 9. The first and second electric motors 2 and 3 are both DC direct-wound electric motors, and are selectively driven by the operation of an operating device on the driver's seat 12 using the battery as a power source. Also the first
The electric motor 2 has a relatively high output and is large in size for normal running of the electric traction vehicle 1 at a speed of about 20 to 30 km/h.
A small-sized model with low output can be used for ultra-low speed running.

Further, the first electric motor 2 has a double-shaft type with one rotating shaft 15 protruding from both sides, and the first electric motor 2 has the rotating shaft 15 perpendicular to the driving wheel shaft 9, and the driving wheel shaft 9,
9 and is attached to the trolley 11.
One end of the rotating shaft 15 is connected to the gear means 7 which houses a bevel gear mechanism for right-angle transmission inside a housing that connects the driving wheel shaft 9 and the case of the first electric motor 2.
are connected to the driving wheel shafts 9, 9, respectively.

The other end of the rotating shaft 15 is connected to the driving portion 19 of the clutch 5 using a propulsion shaft 17 having a universal joint at both ends.

The clutch 5 is, for example, an electromagnetic clutch capable of transmitting large torque, and is connected to the driven portion 19 and the driving portion 2.
Power transmission can be engaged/disengaged by switching between 0 and 0. Further, the drive section 20 of the clutch 5 is connected to the speed reducer 4.
By being attached to the output shaft of the clutch 5, the clutch 5 is interposed between the other end of the rotating shaft 15 and the reducer 4.

The reduction gear 4 is a double-shaft reduction gear of a well-known configuration using a spur gear train, a planetary gear train, a differential gear train, etc., and its input shaft is connected to the rotating shaft of the second electric motor 3 using a joint 22. ing.

Further, in this example, an electromagnetic brake 10, for example, is attached to the rear of the second electric motor 3.

[Effect]

Therefore, the clutch 5 is disengaged, the first and second electric motors 2 and 3 are released, and the first electric motor 2
By driving the electric traction vehicle 1, the electric traction vehicle 1 tows a vehicle or the like at a normal speed, for example, 20 to 30 km/h. Further, the first electric motor 2 can change its rotation speed, for example, a speed as low as to be able to control the first electric motor 2,
For example, the vehicle can run in forward and reverse directions at speeds of about 2 km/h or more, and can be used as a regular electric towing vehicle for shunting vehicles, towing, etc.

Also, the clutch 5 is connected to connect the first and second electric motors 2 and 3. Further, only the second electric motor 3 is energized and rotated. The rotation is transmitted to the driving wheel shaft 9 through the rotating shaft 15 of the first electric motor 2 . In addition, the rotation speed of the second electric motor 3 can be reduced to 2 to 4 m/min by reducing the speed and increasing the torque by the reducer 4.
Vehicles can run at ultra-low speeds at around min. Also, the vehicle can be stopped using the brake 10.

[Effect of idea]

In this way, the electric traction vehicle is equipped with a drive device having a reduction gear driven by a second electric motor in addition to the first electric motor, and therefore, in addition to running at normal speed, it can also run at a stable and continuous ultra-low speed. In addition to general uses such as towing vehicles, it can also be used for extremely low-speed running of vehicles in car wash equipment, etc., expanding its applications and improving versatility and operability. It can have many effects. Furthermore, since the first electric motor is of a double-shaft type and is connected to the speed reducer via a clutch, the structure is simplified and costs are reduced.

In addition to the storage battery type, the towing vehicle of the present invention can be configured as an overhead wire type or an engine-generated type.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, with a truck shown by a dashed line, and FIG. 2 is a plan view. 2...First electric motor, 3...Second electric motor, 4
...Reducer, 5...Clutch, 6...Drive device,
7... Gear means, 9... Driving wheel shaft.

Claims (1)

[Scope of utility model registration request] A first electric motor of a double-shaft type with rotating shafts protruding on both sides has one end of the rotating shaft connected to a driving wheel shaft via gear means, and the other end of the rotating shaft of a reduction gear driven by a second electric motor. An electric traction vehicle equipped with a drive device connected to the output shaft via a clutch that disconnects power transmission between the output shafts.