Vehicle with auxiliary traveling device

• US 6,269,713 B1
• Filed: 10/01/1999
• Issued: 08/07/2001
• Est. Priority Date: 10/02/1998
• Status: Expired due to Fees

• Current Assignee: Osamu Ohke, Projet Company Limited
• Original Assignee: Osamu Ohke, Projet Company Limited
• Inventors: Ohke, Osamu
• Primary Examiner(s): Estremsky, Sherry
• Application Number:
  US09/410,090
• Time in Patent Office: 676 Days
• Field of Search: 475/72, 475/78, 747/321, 747/331
• US Class Current: 74/733.1
• CPC Class Codes: B60K 17/10 of fluid gearing of fluid clutches B60K17/02
• CPC Class Codes: B60K 17/28 characterised by arrangement, location, or type of power take-off
• CPC Class Codes: B60K 6/12 by means of a chargeable fluidic accumulator
• CPC Class Codes: B60W 30/18063 Creeping
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10T 74/19163 with interrelated controls

Abstract

A vehicle which can achieve high speed traveling performance as achieved by a normal vehicle, and which can be continuously driven at inching speed with a traveling prime mover of high revolution speed and high output. The vehicle includes a power train including a primary power transmission for normal traveling, which is connected to a prime mover for normal traveling, for transmitting a rotational torque of the traveling prime mover to driving wheels, through a rotary power transmission shaft, a drive shaft speed reducer and drive shaft, an external power takeoff mechanism incorporated in the primary power transmission, a hydraulic pressure generator connected to an external power takeoff shaft of the external power takeoff mechanism, and a hydraulically controlled power transmission for traveling at inching speed, which includes a hydraulic motor connected to the hydraulic pressure generator. When the primary power transmission for normal traveling is shifted out of the neutral range position, the external power takeoff mechanism and the hydraulically controlled power transmission for traveling at inching speed being made inoperative instantly in response to an electrical signal from a neutral position detector incorporated in said primary power transmission for normal traveling.

Claims

1. A vehicle with an auxiliary traveling device comprising:

a power train including a primary power transmission for normal traveling, which is connected to a traveling prime mover for normal traveling, for transmitting a rotational torque of said traveling prime mover to driving wheels, through a rotary power transmission shaft, a drive shaft speed reducer and a drive shaft;

an external power takeoff mechanism incorporated in said primary power transmission;

a hydraulic pressure generator connected to an external power takeoff shaft of said external power takeoff mechanism;

a hydraulically controlled power transmission for traveling at inching speed, which includes a hydraulic motor connected to said hydraulic pressure generator;

said power train being active for enabling the vehicle to travel at a normal traveling speed while said primary power transmission for normal traveling is placed at a range position other than neutral range position,

said auxiliary traveling device being operated for enabling travel at inching speed when said primary power transmission for normal traveling is placed at neutral range position, and

when said primary power transmission for normal traveling is shifted out of said neutral range position, said external power takeoff mechanism and said hydraulically controlled power transmission for traveling at inching speed being made inoperative instantly in response to an electrical signal from a neutral position detector incorporated in said primary power transmission for normal traveling.

4. A vehicle with an auxiliary traveling device as set forth in claim 1, wherein said hydraulically controlled power transmission for traveling at inching speed is constructed by extending a rotational power transmission shaft through a hydraulic vessel, on which the hydraulic motor is externally installed, connecting a first rotary power transmission shaft and a second rotary power transmission shaft with the rotary power transmission shaft at both ends, and assembling a connecting and disconnecting device for traveling at inching speed constituted of a first drive disc supported on the rotary power transmission shaft for free rotation with respect to the rotary power transmission shaft and a second drive disc fixed on the rotary power transmission shaft and operated for establishing and releasing connection by electrical signal or pneumatic pressure from a vehicular cabin.

7. A vehicle with an auxiliary traveling device as set forth in claim 4, wherein control for connecting and disconnecting of said first and second drive discs in the connecting and disconnecting device for traveling at inching speed is performed by an electrical signal from the vehicular cabin, and in response to shifting of said primary power transmission for normal traveling to the position other than the neutral range position during operation of the external power takeoff mechanism, the external power takeoff mechanism and the connecting and disconnecting device for traveling at inching speed inoperative position in response to an electrical signal from said neutral position detector incorporated in said primary power transmission for normal traveling, instantly.

2. A vehicle with an auxiliary traveling device which travels at a normal traveling speed by transmitting a rotational torque of a traveling prime mover to driving wheels via a rotary power transmission shaft, a drive shaft speed reducer and a drive shaft while a normal traveling primary power transmission is in a range other than a neutral range, and performs a required work by transmitting the rotational torque of said traveling prime mover to an external work implement via an external power takeoff mechanism when said normal traveling primary power transmission is in said neutral range, comprising:

said auxiliary traveling device being formed by connecting a hydraulic pressure generator to an external power takeoff shaft of said external power takeoff mechanism to be driven by said rotational torque of said traveling prime mover, and connecting a hydraulically controlled power transmission for traveling at inching speed to said rotary power transmission shaft, said hydraulically controlled power transmission for traveling at inching speed incorporating a hydraulic motor connected to said hydraulic pressure generator;

said auxiliary traveling device being operated for enabling travel at inching speed in conjunction with operation of said external work implement when said primary power transmission for normal traveling is placed at neutral range position, and

when said primary power transmission for normal traveling is shifted out of said neutral range position, said external power takeoff mechanism and said hydraulically controlled power transmission for traveling at inching speed being made inoperative instantly in response to an electrical signal from a neutral position detector incorporated in said primary power transmission for normal traveling.

5. A vehicle with an auxiliary traveling device as set forth in claim 2, wherein said hydraulically controlled power transmission for traveling at inching speed is constructed by extending a rotational power transmission shaft through a hydraulic vessel, on which the hydraulic motor is externally installed, connecting a first rotary power transmission shaft and a second rotary power transmission shaft with the rotary power transmission shaft at both ends, and assembling a connecting and disconnecting device for traveling at inching speed constituted of a first drive disc supported on the rotary power transmission shaft for free rotation with respect to the rotary power transmission shaft and a second drive disc fixed on the rotary power transmission shaft and operated for establishing and releasing connection by electrical signal or pneumatic pressure from a vehicular cabin.

8. A vehicle with an auxiliary traveling device as set forth in claim 5, wherein control for connecting and disconnecting of said first and second drive discs in the connecting and disconnecting device for traveling at inching speed is performed by an electrical signal from the vehicular cabin, and in response to shifting of said primary power transmission for normal traveling to the position other than the neutral range position during operation of the external power takeoff mechanism, the external power takeoff mechanism and the connecting and disconnecting device for traveling at are placed at an inching speed inoperative position in response to an electrical signal from said neutral position detector incorporated in said primary power transmission for normal traveling, instantly.

3. A vehicle with an auxiliary traveling device comprising:

a power train mechanism driving said vehicle to travel at a normal traveling speed by transmitting a rotational torque of a traveling prime mover to driving wheels via a rotary power transmission shaft, a drive shaft speed reducer and a drive shaft while a normal traveling primary power transmission is in a range other than a neutral range, and to transmit a rotational torque of said traveling prime mover to an external work implement via an external power takeoff mechanism and an external power takeoff shaft for implementing a required work when said normal traveling primary power transmission is in said neutral range;

said auxiliary traveling device being formed by connecting a hydraulic pressure generator to an external power takeoff shaft of said external power takeoff mechanism to be driven by said rotational torque of said traveling prime mover, and connecting a hydraulically controlled power transmission for traveling at inching speed to said rotary power transmission shaft, said hydraulically controlled power transmission incorporating a hydraulic motor connected to said hydraulic pressure generator;

said auxiliary traveling device being operated for enabling travel at inching speed in conjunction with operation of said external work implement when said primary power transmission for normal traveling is placed at neutral range position, and

when said primary power transmission for normal traveling is shifted out of said neutral range position, said external power takeoff mechanism and said hydraulically controlled power transmission for traveling at inching speed being made inoperative instantly in response to an electrical signal from a neutral position detector incorporated in said primary power transmission for normal traveling.

6. A vehicle with an auxiliary traveling device as set forth in claim 3, wherein said hydraulically controlled power transmission for traveling at inching speed is constructed by extending a rotational power transmission shaft through a hydraulic vessel, on which the hydraulic motor is externally installed, connecting a first rotary power transmission shaft and a second rotary power transmission shaft with the rotary power transmission shaft at both ends, and assembling a connecting and disconnecting device for traveling at inching speed constituted of a first drive disc supported on the rotary power transmission shaft for free rotation with respect to the rotary power transmission shaft and a second drive disc fixed on the rotary power transmission shaft and operated for establishing and releasing connection by electrical signal or pneumatic pressure from a vehicular cabin.

9. A vehicle with an auxiliary traveling device as set forth in claim 6, wherein control for connecting and disconnecting of said first and second drive discs in the connecting and disconnecting device for traveling at inching speed is performed by an electrical signal from the vehicular cabin, and in response to shifting of said primary power transmission for normal traveling to the position other than the neutral range position during operation of the external power takeoff mechanism, the external power takeoff mechanism and the connecting and disconnecting device for traveling at inching speed inoperative position in response to an electrical signal from said neutral position detector incorporated in said primary power transmission for normal traveling, instantly.