CN111114301A

CN111114301A - Construction machine

Info

Publication number: CN111114301A
Application number: CN202010002938.2A
Authority: CN
Inventors: 刘波; 徐自华; 刘侃
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-05-08

Abstract

The invention relates to the technical field of engineering, and discloses engineering machinery, which comprises a main engine (10), a transfer case (20), a motor (30), a running system (40) and an operating system (50), wherein the transfer case comprises a power input end (21) connected with the main engine, a power output end (22) connected with the running system, and a first transfer output end (23) and a second transfer output end (24) which are mutually linked, the first transfer output end and the second transfer output end are respectively connected with the motor and the operating system, and the transfer case has a running state and an operating state, wherein: in a running state, the power input end is in transmission connection with the power output end, and the power input end is disconnected from the first split output end and the second split output end; in the operating state, the power input end and the power output end are disconnected in transmission connection. The engineering machine can drive the running system through the main engine and drive the operating system through the motor, so that the working efficiency is improved.

Description

Construction machine

Technical Field

The invention relates to the technical field of engineering, in particular to engineering machinery.

Background

A construction machine such as a mixer truck, a concrete pump truck, or the like is an indispensable device in construction work, and generally has a work system for operating a work mechanism thereof such as a mixer drum or the like and a travel system for traveling. In the conventional construction machine, an engine is generally used for providing driving force for a working system and a running system, for example, when the working system is working, the engine needs to be started to provide driving force for the working system even if the running system is in a stop state. The engine cannot work at the optimum working condition at this time, resulting in low efficiency and increased cost due to high oil consumption.

Disclosure of Invention

The invention aims to overcome the problems of efficiency and cost in the prior art and provide a construction machine which has higher working efficiency and reduced cost.

The invention provides engineering machinery, wherein the engineering machinery comprises a main engine, a transfer case, a motor, a running system and an operating system, the transfer case comprises a power input end, a power output end and a first transfer output end and a second transfer output end which are linked with each other, the power input end is connected with the main engine, the power output end is connected with the running system, the first transfer output end and the second transfer output end are respectively connected with the motor and the operating system, the transfer case has a running state and an operating state, wherein:

in the running state, the power input end is in transmission connection with the power output end, and the power input end is disconnected from the first split output end and the second split output end;

in the operating state, the power input end and the power output end are disconnected in transmission connection.

Preferably, the transfer case includes a shift fork for switching the running state and the working state.

Preferably, the working machine comprises an energy storage device, by means of which the electric machine can be driven.

Preferably, in the operating state, the power input is in driving connection with the first and second partial outputs, and the electric machine is capable of functioning as a generator and storing the generated electric energy in the energy storage device.

Preferably, at least one of the electric machine and the energy storage means comprises an AC/DC converter, the electric machine being connected to the energy storage means via the AC/DC converter.

Preferably, the work machine includes a control device for controlling operation of at least one of the energy storage device, the transfer case, the travel system, the main engine, and the electric machine.

Preferably, the working machine comprises detection means for detecting operating parameters of the travelling system and/or the energy storage means, and the control means is arranged to control the operation of at least one of the energy storage means 60, the transfer case, the travelling system, the main engine, the electric machine in dependence on feedback from the detection means.

Preferably, the control device is configured to be capable of performing at least any one of the following controls:

driving the traveling system by the main engine;

driving the operating system by the motor;

driving the work system by the main engine;

the main engine drives the motor to generate electricity and stores the electric energy in the energy storage device.

Preferably, the engineering machine comprises an interface for connecting with an external power supply, and the interface comprises a charging port for charging the energy storage device and/or a power supply port connected with the motor to drive the motor to work through the external power supply.

Preferably, the work system comprises at least two work units operable respectively; and/or the main engine is a belt-shift starting engine.

Through the technical scheme, the engineering machine can have multiple working modes, wherein the driving system is driven by the main engine, and the working system is driven by the motor, so that the main engine and the motor can work in an economic and efficient interval respectively, and the working efficiency is improved.

Drawings

Fig. 1 is a schematic view illustrating a relationship of respective main parts of an embodiment of a construction machine according to the present invention;

fig. 2 is a schematic diagram illustrating the construction of the transfer case of fig. 1.

Description of the reference numerals

10-main engine, 11-gearbox, 12-first transmission shaft, 20-transfer case, 21-power input end, 22-power output end, 23-first transfer output end, 24-second transfer output end, 25-shifting fork, 26-second transmission shaft, 30-motor, 40-running system, 50-operation system, 60-energy storage device, 61-AC/DC converter, 62-interface and 70-external power supply.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right as viewed with reference to the accompanying drawings, unless otherwise specified; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

According to the present invention, there is provided a construction machine, wherein the construction machine comprises a main engine 10, a transfer case 20, an electric motor 30, a travel system 40 and a work system 50, the transfer case 20 comprises a power input 21, a power output 22 and a first and a

second transfer output

23, 24 linked with each other, the power input 21 is connected to the main engine 10, the power output 22 is connected to the travel system 40, the first and

second transfer outputs

23, 24 are connected to the electric motor 30 and the work system 50 respectively, the transfer case 20 has a travel state and a work state, wherein:

in the driving state, the power input 21 is in driving connection with the power output 22 and the power input 21 is in driving disconnection with the first and second

partial outputs

23, 24;

in the operating state, the power input 21 and the power output 22 are disconnected from the drive connection.

Through different states of the transfer case, the engineering machine can have a plurality of working modes, wherein the running system 40 is driven by the main engine 10, and the working system 50 is driven by the motor 30, so that the main engine 10 and the motor 30 can work in an economic and efficient region respectively, and the working efficiency is improved.

Specifically, when the running system 40 needs to be operated, the transfer case 20 can be in a running state, and the main engine 10 is in transmission connection with the running system of the power output end 22 through the power input end 21, so that the main engine 10 is driven to run. When it is necessary to perform a parking operation, the main engine 10 may be turned off to improve the operation efficiency by supplying power to the motor 30 to drive the operation system 50 by the motor 30 in an economically efficient section thereof for the operation.

In addition, the work machine of the present invention may have other modes of operation, as will be described in more detail below.

In the present invention, the transfer case 20 can switch the running state and the operating state in an appropriate manner. For example, in the embodiment shown in fig. 2, the transfer case 20 includes a shift fork 25 for switching the running state and the operating state.

Specifically, as shown in fig. 2, when it is required to switch to the running state, the shift fork 25 moves rightward, the power input terminal 21 is connected to the power output terminal 22 through the shift fork 25, so that the power of the main engine 10 drives the running system 40, and at this time, the power input terminal 21 is in transmission-disconnected with the first and second

split output terminals

23 and 24. When the operation state needs to be switched, the shifting fork 25 moves leftwards, the power input end 21 is connected with the transmission gear set in the transfer case 20 through the shifting fork 25 and then is in transmission connection with the first transfer output end 23 and the second transfer output end 24, and the power input end 21 is disconnected from the power output end 22 at the moment. In addition, for supplying power to the motor 30, an external power supply can be connected, and an additional mobile power supply can be arranged. Preferably, the working machine comprises an energy storage means 60, and the electric motor 30 is drivable by means of the energy storage means 60.

Furthermore, to realize further operating modes, in the operating state, the power input 21 can be drivingly connected to the first and second

partial outputs

23, 24. Thus, in the operating state, although the main engine 10 is in a drive-disconnected connection with the traveling system 40, the power of the main engine 10 can be output via the first and

second transfer outputs

23, 24. That is, the driving of work system 50 may be achieved by main engine 10. Wherein the electric machine 30 may be disconnected from the second split output 24 in a suitable manner in order to avoid damage to the electric machine 30 connected to the second split output 24 when the main engine 10 drives the work system 50. For example, the motor 30 may be detachably connected to the second split output 24 via the second drive shaft 26.

Preferably, the electric machine 30 is capable of functioning as a generator and storing the generated electric energy in the energy storage means 60. Thus, when the main engine 10 drives the work system 50 and the output power is large and there is a margin for supplying the work system 50, the surplus energy may be generated by the motor 30 and stored in the energy storage device 60.

For the convenience of conversion and storage of electric energy, corresponding converters may be provided on the energy storage device 60 and the motor 30. Specifically, at least one of the motor 30 and the energy storage device 60 includes an AC/DC converter 61, and the motor 30 is connected to the energy storage device 60 through the AC/DC converter 61. It should be noted that the AC/DC converter described herein can realize bidirectional conversion between AC power and DC power. In the embodiment shown in fig. 1, the energy storage device 60 is provided with an AC/DC converter 61.

Furthermore, to facilitate operation by electric energy, the work machine may comprise an interface 62 for connection to an external power source, the interface 62 comprising a charging port for charging the energy storage means 60 and/or a power supply port connected to the electric motor 30 for operation by the external power source for driving the electric motor 30. Therefore, when the construction machine is in a state of convenient power connection (with the external power supply 70), the energy storage device 60 can be charged from the external power supply through the charging port, and the external power supply 70 can directly supply power to the motor 30 through the power supply port to drive the operation system.

To facilitate multiple operating modes of the work machine, the work machine includes a control device for controlling operation of at least one of the energy storage device 60, the transfer case 20, the travel system 40, the main engine 10, and the electric machine 30.

Furthermore, control means may be provided for corresponding control in dependence on the state of the travel system 40 and/or the energy storage means 60, for which purpose the working machine comprises detection means for detecting operating parameters of the travel system 40 and/or the energy storage means 60, said control means being provided for enabling control of the operation of at least one of the energy storage means 60, the transfer case 20, the travel system 40, the main engine 10, the electric machine 30 in dependence on feedback from said detection means.

The control device may include specific components according to specific components to be controlled, and may include, for example, a motor controller (controlling the motor 30), an energy management controller (controlling the energy storage device 60), a transmission controller, a brake controller (controlling the brake of the traveling system 40), and the like.

The detection device may be of various suitable types, for example, the output rotation speed of the gearbox 11, the torque, the wheel rotation speed of the running gear of the running system 40, the electric quantity of the energy storage device 60, the state parameter of the brake pedal, etc., according to the detected operating parameter. According to the working parameters, the control device can perform corresponding control. For example, when the wheel speed of the traveling device fed back by the detection device is 0, the control device determines that the vehicle is in a stopped state, and when the electric quantity of the energy storage device 60 is sufficient and the operation is performed by the operation system 50, the control device may control the energy storage device 60 to supply power to the motor 30 so as to drive the operation system 50 to operate by the motor 30.

in the first mode: driving the running system 40 by the main engine 10;

in the second mode: driving the work system 50 by the motor 30;

in the third mode: driving the work system 50 by the main engine 10;

a fourth mode: the electric machine 30 is driven by the main engine 10 to generate electricity and store electric energy in the energy storage device 60.

The application of the various modes described above is described in detail below with reference to the embodiment of fig. 1.

In the first mode: in this mode, the running system 40 is driven by the main engine 10, and at this time, the transfer case 20 is in a running state, and specific energy transmission paths are as follows: main engine 10 → power input end 21 → power output end 22 → traveling system 40.

In the second mode: in this mode, the operation system 50 is driven by the motor 30, and at this time, the transfer case 20 is in a driving state, and specific energy transmission paths are as follows: motor 30 → second split output 24 → first split output 23 → work system 50. In this mode, the motor 30 may be powered by the energy storage device 60 or the external power source 70.

In the third mode: in this mode, the work system 50 is driven by the main engine 10, and the transfer case 20 is in a working state, and the specific energy transmission paths are as follows: main engine 10 → power input 21 → first split output 23 → work system 50.

A fourth mode: in this mode, the main engine 10 drives the electric machine 30 to serve as a generator to generate electricity and store the generated electric energy in the energy storage device 60, and at this time, the transfer case 20 is in an operating state, and the specific energy transmission path is as follows: main engine 10 → power input end 21 → second split output end 24 → electric machine 30 → energy storage device 60.

Of course, the above modes may be used in combination without interfering with each other. For example, the electric machine 30 is driven to charge the energy storage device 60 while the work system 50 is driven by the main engine 10. Additionally, in a parking situation and where greater power of primary engine 10 is required (e.g., to drive work system 50), transmission 11 may be shifted to neutral to use most of the power of primary engine 10 to drive work system 50.

In addition, to provide more operating modes, the operating system 50 may include at least two operating units that can be operated separately to select different operating units to operate in different operating modes. For example, taking the engineering machine as a vehicle-mounted concrete pump truck as an example, the operation system 50 includes a main oil pump for pumping concrete, a constant pressure pump for driving a tilt cylinder, and a gear pump for driving a stirring device, and in the pumping operation of pumping materials, the main oil pump, the constant pressure pump, and the gear pump are all in a working state; in the waiting operation of waiting for the material, the main oil pump stops working, but in order to keep concrete in the hopper from segregating, the constant pressure pump and the gear pump are still in working states.

In the material waiting operation, the driving of the main engine 10 or the driving of the motor 30 can be selected, and when the main engine 10 is used for driving, surplus energy can be recovered through the motor 30.

In addition, in the present invention, the main engine 10 may be a shift-start engine. Specifically, the control routine of the main engine 10 may be modified to provide a high torque when the main engine 10 is started, so that the transmission, transfer case, and associated work system may be driven at the same time as the start. In addition, the transmission may be in a certain gear when the main engine 10 is operating; the operation of the main engine 10 is stopped, the operation is switched to the operation of the motor 20, and the operation is switched to the operation of the main engine 10 after a period of time, so that the main engine can be restarted at the last gear of the gearbox. By setting the main engine 10 to start in gear, the operations of the main engine 10 and the electric motor 20 can be switched arbitrarily on the panel without returning to the main engine of the construction machine (for example, the cab of the truck-mounted concrete pump truck) to start the main engine 10.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. The invention includes the combination of the individual features in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. A working machine, characterized in that it comprises a main engine (10), a transfer case (20), an electric motor (30), a travel system (40) and a work system (50), said transfer case (20) comprising a power input (21), a power output (22) and a first transfer output (23) and a second transfer output (24) coupled to each other, said power input (21) being connected to said main engine (10), said power output (22) being connected to said travel system (40), said first transfer output (23) and said second transfer output (24) being connected to said electric motor (30) and to said work system (50), respectively, said transfer case (20) having a travel state and a work state, wherein:

in the driving state, the power input (21) and the power output (22) are in transmission connection, and the power input (21) is in transmission disconnection with the first and second power split outputs (23, 24);

in the operating state, the power input (21) and the power output (22) are disconnected from a transmission connection.

2. A working machine according to claim 1, characterized in that the transfer case (20) comprises a shift fork (25) for switching the driving state and the working state.

3. A working machine according to claim 1, characterized in that the working machine comprises an energy storage means (60), the electric machine (30) being drivable by means of the energy storage means (60).

4. A working machine according to claim 3, characterized in that in the working state the power input (21) is drivingly connectable with the first and second split outputs (23, 24), the electric machine (30) being operable as a generator and storing the generated electric energy in the energy storage means (60).

5. A working machine according to claim 4, characterized in that at least one of the electric machine (30) and the energy storage means (60) comprises an AC/DC converter (61), the electric machine (30) being connected to the energy storage means (60) via the AC/DC converter (61).

6. A working machine according to claim 4, characterized in that the working machine comprises control means for controlling the operation of at least one of the energy storage device (60), the transfer case (20), the travelling system (40), the main engine (10), the electric machine (30).

7. A working machine according to claim 6, characterized in that the working machine comprises detection means for detecting operating parameters of the travelling system (40) and/or the energy storage means (60), and that the control device is arranged to control the operation of at least one of the energy storage means (60), the transfer case (20), the travelling system (40), the main engine (10), the electric machine (30) in dependence on feedback from the detection means.

8. A working machine according to claim 7, characterized in that the control device is arranged to be able to control at least any of:

-driving the running system (40) by means of the main engine (10);

-driving the work system (50) by means of the electric motor (30);

-driving the work system (50) by the main engine (10);

the main engine (10) drives the motor (30) to generate electricity and store the electric energy in the energy storage device (60).

9. A working machine according to claim 3, characterized in that the working machine comprises an interface (62) for connection to an external power source, which interface (62) comprises a charging port for charging the energy storage means (60) and/or a power supply port connected to the electric machine (30) for operation of driving the electric machine (30) by an external power source (70).

10. A working machine according to any one of claims 1-9, characterized in that the working system (50) comprises at least two working units that are separately operable; and/or the main engine (10) is a geared start engine.