JP2019189146A - Hybrid type transmission - Google Patents

Abstract

To provide a hybrid type transmission which can mechanically disconnect a non-use power source during operation by use of only power of one of an engine and a motor.SOLUTION: A hybrid type transmission has: a first input shaft 12 to which power from an engine is inputted; engine system gear change means 36 which transmits power inputted via the first input shaft 12 to an output shaft 32; a hydraulic clutch which is provided on the engine system gear change means 36, and obtains a working pressure by a hydraulic pressure obtained by power of the engine; a second input shaft 24 to which power from a motor 26 is inputted; motor system gear change means 38 which transmits power inputted via the second input shaft 24 to the output shaft 32; and an engagement clutch 42 provided on the motor system gear change means 38.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transmission, and more particularly, to a hybrid transmission that can switch a vehicle traveling by an engine drive and a vehicle traveling by a motor.

  In recent years, various types of so-called hybrid type vehicles having both engine and motor drive systems have been researched and developed. For example, a railway vehicle disclosed in Patent Document 1 includes a diesel engine and a motor as drive means, and each is arranged so as to drive separate axles. The motor is mainly operated during low-speed operation, and the diesel engine is mainly operated during medium-high speed operation. Further, the vehicle disclosed in Patent Document 1 describes that a motor is used as a generator during deceleration, and the diesel engine maintains an idling state even during operation by the motor.

  On the other hand, the technique disclosed in Patent Document 2 shows that the engine can be stopped when the motor is operated. The hybrid vehicle disclosed in Patent Document 2 depends on the driving force of the motor when the vehicle is operated with the engine, in addition to the operation with only the motor operated, the operation with only the engine operated. Energy recovery (acquisition of regenerative energy) by the motor during assist and braking is enabled.

JP 2000-350308 A JP 2010-241390 A

  According to the vehicle disclosed in Patent Document 2, in addition to the operation by the engine, the operation by the power of only the motor is possible. However, none of the vehicles disclosed in Patent Documents 1 and 2 can separate the motor power transmission system from the output shaft. For this reason, when the motor is not driven during operation by the engine, regardless of whether the motor is intended or not, the motor substantially acts as a resistance, and the engine output is lost.

  An object of the present invention is to provide a hybrid transmission capable of mechanically disconnecting an unused power source during operation with power of only one of both an engine and a motor.

  In order to achieve the above object, a hybrid transmission according to the present invention transmits a first input shaft to which power from an engine is input and an output shaft that outputs the power input through the first input shaft. An engine system transmission unit, a hydraulic clutch provided in the engine system transmission unit and obtaining an operating pressure by a hydraulic pressure obtained by the engine power; a second input shaft to which power from a motor is input; and the second input The motor system transmission means which transmits the motive power input through the shaft to the output shaft, and the mesh clutch provided in the motor system transmission means.

  In the hybrid transmission having the above-described characteristics, the meshing clutch may be configured to be operable by air pressure. By having such a feature, even when the engine is stopped and the hydraulic pressure cannot be obtained, the meshing clutch can be operated and the power from the motor can be transmitted to the output shaft.

  Moreover, the hybrid transmission which has the above characteristics WHEREIN: The said meshing clutch can also be set as the structure which can be act | operated by manual operation. With this feature, the meshing clutch is operated and the motor power is output even when the engine is stopped and oil pressure cannot be obtained, and even when sufficient air pressure cannot be supplied. It is possible to transmit to the shaft.

  Furthermore, in the hybrid transmission having the above-described characteristics, the meshing clutch may include a switching position that constitutes a power transmission system that transmits the power of the engine to the motor. By having such a feature, it is possible to intentionally operate the motor as a generator and perform power generation during operation using the engine as power.

  According to the hybrid transmission having the above-described characteristics, it is possible to mechanically disconnect the unused power source during operation with only one of the engine and the motor. Therefore, when the operation is performed by the power of the engine, the motor becomes a resistance, so that no output loss is caused.

It is a schematic diagram which shows the structure of the transmission which concerns on 1st Embodiment. It is a schematic diagram for demonstrating the arrangement | positioning relationship of the rotating shaft in the transmission which concerns on embodiment. It is a schematic diagram which shows the structure of the transmission which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the hybrid transmission according to the present invention will be described in detail with reference to the drawings. The following embodiment is a part of a preferred form for configuring the hybrid transmission according to the present invention, and even when a part of the structure is changed as long as the effect is achieved. Can be considered part of the present invention.

[First Embodiment]
First, the hybrid transmission according to the first embodiment will be described with reference to FIG. The hybrid transmission according to the present embodiment (hereinafter simply referred to as transmission 10) is based on the first input shaft 12, the second input shaft 24, the output shaft 32, the engine system transmission means 36, and the motor system transmission means 38. It is configured.

  The first input shaft 12 is a shaft to which power from an engine (for example, a diesel engine) is input, and a coupling 14 is provided on the input side. The coupling 14 is a joint that is interposed between the first input shaft 12 and the rotary shaft 16 that transmits power from the output shaft of the engine. As shown in FIG. 1, by using the coupling 14 as a fluid coupling, it is possible to adjust the rotational speed and torque of the power input to the first input shaft 12 by hydraulic pressure.

  Further, the first input shaft 12 according to the present embodiment is provided with a hydraulic clutch 36a having a back gear 36a1 constituting an engine system transmission means 36 and a transmission gear 36a2 in addition to the pump driving gear 20. . The pump driving gear 20 is an element that rotates with the rotation of the first input shaft 12 and rotates the driving shaft 22 a of the hydraulic pump 22. The hydraulic pump 22 plays a role of supplying lubricating oil to each sliding portion in addition to supplying hydraulic oil for operating the hydraulic clutches 36a, 36b, and 36c constituting the engine system transmission means 36.

  The second input shaft 24 is a shaft to which power from the motor 26 is input, and is connected to the rotating shaft 26 a of the motor 26 via the coupling 28. The second input shaft 24 is an element that transmits the power of the motor 26 to the motor system speed change means 38 including the drive mode selection shaft 40. The second input shaft 24 is provided with a gear 30 for transmitting power to the drive mode selection shaft 40. The drive mode selection shaft 40 is provided with a meshing clutch 42 so that power can be transmitted to and disconnected from the subsequent gears 44 and 46.

  The meshing clutch 42 according to the present embodiment is configured to include an air cylinder 48 in the shifter portion. With such a configuration, the meshing clutch 42 can be switched between the meshing state and the disengaged state by air pressure. The shifter portion is also provided with a switching lever 50 for manually switching the state of the meshing clutch 42. With such a configuration, even when the air pressure for switching the state of the meshing clutch 42 cannot be sufficiently ensured, the state of the meshing clutch 42 can be switched.

  The output shaft 32 is a rotating shaft that plays a role of outputting the power in which the rotational speed and torque are converted via the engine system transmission unit 36 or the motor system transmission unit 38. In the case of this embodiment, a common speed change shaft 34 is interposed between the engine system speed change means 36 and the motor system speed change means 38 and the output shaft 32.

  The engine transmission means 36 is a transmission means interposed between the first input shaft 12 and the output shaft 32 (transmission shaft 34), and includes a plurality of rotation shafts, a plurality of gears, and hydraulic clutches 36a, 36b, 36c. It is an element that performs transmission of power, conversion of rotation speed, torque, and change of rotation direction.

  In the present embodiment, the transmission gear 36a2 constituting the hydraulic clutch 36a meshes with the transmission gear 36b2 constituting the hydraulic clutch 36b including the front gear 36b1, and the power of the first input shaft 12 is used as the rotation shaft of the hydraulic clutch 36b. Configured to communicate.

  In the transmission 10 according to the present embodiment, as shown in FIG. 2, a rotation shaft that constitutes the engine system transmission means 36 and a rotation shaft that constitutes the motor system transmission means 38 are respectively arranged so as to surround the output shaft 32. ing. Both the back gear 36a1 and the front gear 36b1 mesh with the transmission gear 36c1 constituting the hydraulic clutch 36c, and the rotation direction of the transmitted power can be changed by the operation of either the hydraulic clutch 36a or the hydraulic clutch 36b. It is configured to be possible.

  The motor system speed change means 38 is a speed change means interposed between the second input shaft 24 and the output shaft 32 (speed change shaft 34), and has a plurality of rotation shafts and a plurality of gears. The element that performs the conversion. As described above, in the transmission 10 according to the present embodiment, the engine system transmission unit 36 and the motor system transmission unit 38 are disposed so as to surround the output shaft 32, and each has a separate power transmission system. Then, by switching the hydraulic clutches 36a and 36b and the meshing clutch 42, it is possible to switch the rotational direction of the power and the transmission system.

  In the transmission 10 having such a configuration, when the engine is driven, the hydraulic pressure obtained by the hydraulic pump 22 is supplied as hydraulic oil to the hydraulic clutches 36a, 36b, 36c provided in the engine system transmission means 36, thereby transmitting power. It is possible. The hydraulic pump 22 also plays a role of supplying lubricating oil to each sliding portion.

  On the other hand, when the engine is stopped and driven by the motor 26, the meshing clutch 42 is operated by air pressure, and the power of the motor 26 is transmitted to the output shaft 32 via the motor system transmission means 38. . The air pressure for operating the mesh clutch 42 may be stored by operating a compressor (not shown) when the engine is driven. Here, the lubricating oil in the sliding portion when the engine is stopped is configured to be supplied by the lubricating pump 18 that obtains power from the gear 30 provided on the rotating shaft 26a of the motor 26. The lubrication pump 18 that does not need to supply hydraulic oil for the hydraulic clutches 36 a, 36 b, 36 c can be a pump having a smaller capacity than the hydraulic pump 22.

[effect]
According to the transmission 10 having such a configuration, even when the engine is stopped, the power transmission path is switched and the motor 26 can be driven. Further, since the power transmission system of the motor 26 can be disconnected from the output shaft 32 when driven by the engine, it is possible to prevent the motor 26 from becoming a resistance and causing a large output loss.

  Further, when driven by the motor 26, the engine can be completely stopped, so that exhaust gas is not discharged. Therefore, even when traveling in a poorly breathable space such as a tunnel, it is possible to proceed without contaminating the space. For this reason, even when a worker performs an external work in such a space, a situation in which the worker sucks exhaust gas can be avoided.

  Further, when the transmission 10 having such a configuration is mounted on a railway vehicle, the vehicle can be moved and retracted from the track even when power from the engine cannot be obtained. Therefore, it is possible to reduce the influence on the following vehicle caused by the vehicle failure.

[Second Embodiment]
Next, a second embodiment of the hybrid transmission according to the present invention will be described with reference to FIG. Note that most of the configuration of the transmission 10A according to the present embodiment is the same as that of the transmission 10 according to the first embodiment described above. Therefore, portions having the same configuration are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.

  The configuration of the drive mode selection shaft 40 is different between the transmission 10A according to the present embodiment and the transmission 10 according to the first embodiment. The drive mode selection shaft 40 in the transmission 10 according to the first embodiment can be connected to and disconnected from the rear gears 44 and 46 of the motor system transmission means 38 by a meshing clutch 42 that can switch between two positions. It was supposed to be configured. On the other hand, the drive mode selection shaft 40 according to the present embodiment is provided with a meshing clutch 42A that enables switching between three positions.

  The meshing clutch 42a of this embodiment includes a position for transmitting the power of the motor 26 to the output shaft 32 (motor drive position), a position for disconnecting the motor 26 from the drive system (engine drive position), and the engine power. The position (generation position) for transmission to H.26 can be switched.

  The position for transmitting the power of the engine to the motor 26 allows the power of the gear 20 that transmits power from the first input shaft 12 to the hydraulic pump 22 to be transmitted to the drive mode selection shaft 40. is there. By selecting such a position, the motor 26 can be intentionally operated as a generator.

  About another structure, an effect | action, and an effect, it is the same as that of the transmission 10 which concerns on 1st Embodiment mentioned above.

10, 10A ... Transmission, 12 ... First input shaft, 14 ... Coupling, 16 ... Rotary shaft, 18 ... Lubrication pump, 20 ... Gear, 22 ... Hydraulic pump , 22a ......... drive shaft, 24 ......... second input shaft, 26 ......... motor, 26a ......... rotation shaft, 28 ......... coupling, 30 ......... gear, 32 ......... output shaft, 34 ......... Speed change shaft, 36 ......... Engine system speed change means, 36a, 36b, 36c ......... Hydraulic clutch, 36a1 ......... Back gear, 36a2 ......... Transmission gear, 36b1 ......... Front gear, 36b2 ... ... Transmission gear, 36c1 ... Transmission gear, 38 ... Motor system speed change means, 40 ... Drive mode selection shaft, 42 ... Intermeshing clutch, 44, 46 ... Gear, 48 ... Air Cylinder, 50 ......... Switching lever

Claims (4)

A first input shaft to which power from the engine is input;
Engine system transmission means for transmitting power input via the first input shaft to an output shaft for outputting;
A hydraulic clutch provided in the engine system speed change means and obtaining an operating pressure by a hydraulic pressure obtained by power of the engine;
A second input shaft to which power from the motor is input;
Motor system transmission means for transmitting power input through the second input shaft to the output shaft;
And a meshing clutch provided in the motor system transmission means.   The hybrid transmission according to claim 1, wherein the meshing clutch is configured to be operable by air pressure.   The hybrid transmission according to claim 1 or 2, wherein the meshing clutch is configured to be operable by a manual operation.   The hybrid transmission according to any one of claims 1 to 3, wherein the meshing clutch includes a switching position that constitutes a power transmission system that transmits power of the engine to the motor.

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