WO2013078818A1

WO2013078818A1 - Engineering truck and driving system thereof

Info

Publication number: WO2013078818A1
Application number: PCT/CN2012/074248
Authority: WO
Inventors: 李涛; 牛从民; 王涛
Original assignee: 湖南三一智能控制设备有限公司; 三一汽车起重机械有限公司
Priority date: 2011-11-28
Filing date: 2012-04-18
Publication date: 2013-06-06
Also published as: CN102431447A

Abstract

An engineering truck and a driving system thereof. The driving system comprises a multistage axle, a lower truck engine (1), an upper truck engine (5), a hydraulic motor (16) and a hydraulic pump (7). The multistage axle, the lower truck engine (1), and the upper truck engine (5) are arranged on the engineering truck (100); the hydraulic motor (16) is in driving connection with a wheel (10) of at least one stage axle (15); the hydraulic pump (7) is used for providing oil for the hydraulic motor; and the power of the hydraulic pump is supplied from the upper truck engine or from the lower truck engine. According to the driving system, wheels of some axles are directly driven by fully utilizing the power of the upper truck engine or the lower truck engine and a corresponding hydraulic system, so that an auxiliary driving force is provided for the whole truck under the circumstance that the driving capability of the conventional drive of the lower truck engine is insufficient or the power transmission capability is poor, so as to improve the driving performance of the whole truck, thereby satisfying the power requirement of the engineering truck under the circumstance of bad road conditions or during climbing; in addition, the wheels are directly driven by the motor so that the structures of the corresponding axles are simplified.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention This application claims priority to Chinese Patent Application No. 201110383567.8, entitled "An Engineering Vehicle and Its Drive System", filed on November 28, 2011. The entire contents are incorporated herein by reference.

Technical field

The invention relates to the technical field of engineering machinery, in particular to an engineering vehicle and a driving system thereof.

Background technique

Engineering vehicles are widely used in heavy-duty transportation, construction, field hoisting, and public service. The construction environment is usually poor, and the road surface is uneven and the road conditions are poor. Therefore, the driving performance of the engineering vehicles has received increasing attention. For example, wheeled cranes often need to be moved back and forth between construction sites during construction operations. In the course of driving, it is often necessary to pull up mountains and wading. Therefore, customers are more concerned about wheeled cranes, especially large tonnage wheeled cranes. Drive performance requirements are getting higher and higher.

In the prior art, the getting off engine on the engineering vehicle provides power for the axle through the gearbox, the transmission shaft, etc., but for the engineering vehicle with more axles or larger p-positions, for example, for large tonnage wheeled cranes. Because of the large total wheelbase, it is difficult to meet the need to transmit power to a farther axle due to the common drive shaft mode or certain components on the power transmission chain, thus affecting the overall vehicle drive performance.

Therefore, how to improve the driving performance of the engineering vehicle is a technical problem to be solved by those skilled in the art.

Summary of the invention

In view of the above, the present invention is directed to an engineering vehicle and a drive system thereof, to solve the existing aspect, the present invention provides a drive system for a construction vehicle, the drive system including the engineering vehicle. Multi-level axles also include:

a loading engine provided on the engineering vehicle;

a hydraulic motor coupled to the wheel drive of at least one of the axles;

a hydraulic pump that supplies oil to the hydraulic motor, the hydraulic pump taking a force from the upper engine. Further, the upper engine is provided with a power take-off port, and the hydraulic pump takes a force from the power take-off port through the power take-off. further,

The drive system further includes a hydraulic oil tank and a directional control valve;

The oil outlet of the hydraulic pump and the hydraulic oil tank are connected to the inlet and outlet ports of the hydraulic motor through the directional control valve.

Further, the directional control valve is a two-position four-way solenoid valve.

Further, the driving system further includes:

a lowering engine provided on the engineering vehicle;

a gearbox that is drivingly coupled to an output of the vehicle that is disengaged;

a transfer case that is coupled to at least another stage of axle drive;

a drive shaft coupled between the gearbox and the transfer case.

In another aspect, the present invention provides a driving system for another engineering vehicle, the driving system comprising a multi-level axle and a disengaged engine disposed on the engineering vehicle, and a gearbox connected to the driving engine of the vehicle. a transfer case coupled to at least one stage axle drive and a drive shaft coupled between the gearbox and the transfer case, further comprising:

a hydraulic motor (5) coupled to the wheel drive of at least another stage axle;

a hydraulic pump for supplying oil to the hydraulic motor, the hydraulic pump taking a force from the lower engine, the transmission, the transmission shaft or the transfer case.

further,

The lower engine, the gearbox, the transmission shaft or the transfer case is provided with a force take-up port;

The hydraulic pump takes a force from the power take-off port through a power take-off.

further,

In still another aspect, the present invention provides an engineering vehicle provided with the drive system of any of the above.

Further, the engineering vehicle is specifically a wheeled crane.

A driving system for a construction vehicle and an engineering vehicle having the same, Driving the wheels of some axles, so that the driving force of the conventional drive of the getting off engine is insufficient or the power transmission capability is poor, the auxiliary driving force is provided for the whole vehicle to improve the driving performance of the whole vehicle, so as to meet the road condition of the engineering vehicle. Compared with the prior art, the power requirement of the bad or climbing slope not only improves the power of the getting off engine but also improves the passing ability of the engineering vehicle; in addition, since the wheel is driven directly by the motor, the corresponding axle is compressed. Structure.

DRAWINGS

1 is a schematic structural view of an engineering vehicle having an upper engine and a lower engine; FIG. 2 is a schematic diagram showing the composition of a driving system applied to the engineering vehicle shown in FIG. 1 according to the first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a driving system applied to the engineering vehicle shown in FIG. 1 according to a second embodiment of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description and description of specific structures in this section are merely illustrative of specific embodiments and should not be construed as limiting the scope of the invention.

Please refer to FIG. 1 to FIG. 3 , wherein FIG. 1 is a schematic structural view of an engineering vehicle having an upper engine and a lower engine, and FIG. 2 is a first embodiment of the present invention applied to the engineering shown in FIG. 1 . FIG. 3 is a schematic structural diagram of a driving system applied to the engineering vehicle shown in FIG. 1 according to a second embodiment of the present invention. The embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 3.

As shown in FIG. 1, the engineering vehicle 1 QQ is provided with a lowering engine 1 and a loading engine 5, wherein the getting-off engine 1 is generally used to power the driving of the engineering vehicle 100, and the loading engine 5 is generally used for The on-board equipment on the engineering vehicle 100 provides operating power. For example, when the engineering vehicle 100 is a truck crane, the lower engine 1 is used to provide driving power for the vehicle chassis to meet the needs of the vehicle crane transition, and the upper engine 5 is used. It powers the lifting process of truck cranes.

As shown in FIG. 2, the driving system of this embodiment includes a multi-stage axle provided on the chassis of the engineering vehicle 100, that is, the first axle 11, the second axle 12, the third axle 13 and the Nth vehicle. The bridge 14 and the Mth axle 15 and the like also include the getting off engine 1, the gearbox 2, the drive shaft 3, the transfer case 4, and the boarding The engine 5, the power take-off 6, the hydraulic pump 7, the hydraulic oil tank 8, the directional control valve 9, the hydraulic motor 16, and the like, wherein the wheels 10 are provided on both sides of each axle.

The output end of the lower engine 1 is drivingly connected with the input end of the transmission 2, the output end of the transmission 2 is drivingly connected with one end of the transmission shaft 3, and the other end of the transmission shaft 3 is drivingly connected with the input end of the transfer case 4, The output of the movable box 4 is powered by a transmission for a part of the axle, and the transfer case 4 is shown in Fig. 1 through the drive shaft and the first axle 1 1 , the second axle 12 and the third axle 13 In connection, the third axle 13 can be drivingly coupled to the Nth axle 14 via the drive shaft 17 to further power the Nth axle 16 .

The upper engine 5 is provided with a power take-off port, and the power take-off 6 is drivingly connected with the power take-off port, the output end of the power take-off 6 is drivingly connected to the hydraulic pump 7, and the hydraulic pump 7 is driven from the upper engine 5 by the power take-off 6 The power inlet of the hydraulic pump is connected to the hydraulic oil tank 8 through a hydraulic hose, and the oil outlet of the hydraulic pump 7 and the hydraulic oil tank 8 are respectively connected to the inlet and outlet ports of the hydraulic motor 16 through the hydraulic hose and the directional control valve 9; The number of hydraulic motors 16 is two, and the output end thereof is drivingly connected with a part of the wheel 10 of the axle that is not driven by the transfer case 4, and the hydraulic motor 16 can be disposed at the inner side of the wheel 10, only shown in FIG. The output of the hydraulic motor 16 is drivingly coupled to the wheels on either side of the Mth axle 14.

In the above embodiment, a clutch may be added between the hydraulic motor 7 and the wheel 10 of the Mth axle 15 as needed (not shown for selectively controlling the engagement or disengagement of the hydraulic motor 7 with the wheel 10) and / or a speed reducer (not shown for increasing the reduction ratio), the clutch and the installation of the reducer can be found in the related prior art.

In the above embodiment, the directional control valve 9 is a two-position four-way solenoid valve, that is, the directional control valve 9 has two working states. In the first working state, the oil outlet of the hydraulic pump 7 and the hydraulic motor 16 are advanced. The oil port is connected (through a hydraulic hose), the oil outlet of the hydraulic motor 16 is connected to the hydraulic oil tank 6 (through a hydraulic hose), and in the second working state, the oil outlet of the hydraulic pump 7 and the hydraulic motor 16 The oil outlets are all in communication with the hydraulic oil tank 8, and the hydraulic pump 7 does not supply oil to the hydraulic motor 16. It should be noted that the above embodiment may also use other forms of directional control valves as long as the hydraulic pump 7 can be supplied to the hydraulic motor 16 The commutation control can be.

In the above embodiment, the hydraulic system constituted by the hydraulic pump 7, the hydraulic motor 16, the directional control valve 9, and the hydraulic oil tank 8 is an open hydraulic system, and in other cases, a closed hydraulic system may be used as needed. The construction of a closed system can be found in the related prior art. The working principle of the driving system of the above embodiment is as follows:

When the vehicle speed of the engineering vehicle 100 is higher than 10 km/h (or other preset value), the hydraulic pump 7 is not made to the hydraulic motor 16 by controlling the directional control valve 9 or controlling the clutch provided between the hydraulic motor 16 and the wheel 10. The oil supply or the output end of the hydraulic motor 16 is separated from the wheel 10. At this time, the wheel 10 of the Mth axle 15 does not have the driving capability, and the power provided by the lower engine 1 by the conventional transmission mode is sufficient to satisfy the normal running of the engineering vehicle 100. Demand

When the vehicle speed of the construction vehicle 100 is lower than 10 km/h (or other preset value) or the construction vehicle 100 needs to climb the hill, by controlling the directional control valve 9 or controlling the clutch provided between the hydraulic motor 16 and the wheel 10, The hydraulic pump 7 is supplied with oil to the hydraulic motor 16 and the output end of the hydraulic motor 16 is engaged with the wheel of the Mth axle 15. At this time, the wheels of the Mth axle 15 are provided with driving capability, in order to achieve better driving performance, It is also possible to carry out the following steps before the wheel of the Mth axle 15 has a driving force as needed (for example, by a combination of hardware and software): 1) reading the rotational speed, torque of the engine 1 and the gear position of the transmission 2 And calculating the average torque of the current axle; 2) adjusting the displacement of the hydraulic pump 7, the displacement of the hydraulic motor 16, the output speed of the upper engine 5 or the power take-off 6 according to the average torque, and the hydraulically driven wheel 1 The parameters such as the speed and torque of 0 are compatible with the wheels of other axles.

It should be noted that, in the above embodiment, the hydraulic pump 7 obtains power from the power take-off port of the upper engine 5 through the power take-off 6, but in other embodiments, the power take-off 6 can also be shifted from the lower engine 1 The other position of the box 2, the drive shaft 3 or the power take-off box on the transfer case 4 is taken, for example: the second embodiment of the present invention as shown in FIG. 3, the second embodiment includes the first embodiment Getting off engine 1, gearbox 2, drive shaft 3, transfer case 4, hydraulic motor 16, power take-off 6, hydraulic pump 7, hydraulic tank 8, directional control valve 9, first axle 11, second axle 12. The third axle 1 3, the Nth axle 14 and the Mth axle 15 are different, and the difference is that the power take-off 7 takes power from the power take-off port on the lower engine 1 and gets off the engine. The direct drive of the wheel 10 of the Mth axle 15 can also be achieved by the power take-off 6 and the corresponding hydraulic system.

It should be noted that, in the above embodiment, the hydraulic motor 16 directly drives the wheel 10 connected to the Mth axle 15, but in other embodiments, the hydraulic motor 16 may be drivingly coupled to the Mth axle 15, and further In order to have a certain reduction ratio, a corresponding speed reducer can be added between the hydraulic motor 16 and the Mth axle 15 as needed. It should be noted that, in the above embodiment, the power source of the hydraulic system is derived from the upper engine 5, but in other embodiments, an independent engine may be disposed on the engineering vehicle 100 as needed, and the independent engine is dedicated to The hydraulic system provides power. In this solution, the output of the independent engine drives the hydraulic pump to rotate. The hydraulic pump does not need to be powered by the power take-off. It should also be noted that in the above embodiment, in order to optimize the distribution and convenience of the power source. Implemented, several axles in the multi-stage axle near the lower engine 1 (ie the first axle 11, the second axle 12, the third axle 13 and the Nth axle 14 shown in Figure 1) are usually The transfer case 4 is used to power it, while the wheel away from the axle of the lower engine 1 (i.e., the wheel 10 of the Mth axle 15 shown in Fig. 1) is typically powered by a hydraulic motor 16.

The driving system of the engineering vehicle provided by the embodiment of the invention directly drives the wheels of some axles by fully utilizing the power of the engine of the boarding or disengaging engine and the corresponding hydraulic system, so that the driving of the conventional transmission of the engine of the vehicle is driven. When the capacity is insufficient or the power transmission capability is poor, the auxiliary driving force is provided for the whole vehicle to improve the driving performance of the whole vehicle, thereby meeting the power demand of the engineering vehicle in the bad road condition or climbing the slope, which is improved compared with the prior art. The power of the getting off engine also improves the passing ability of the engineering vehicle; in addition, since the wheel is driven directly by the motor, the structure of the corresponding axle is cylindrical.

The embodiment of the present invention further provides a construction machine, such as a wheeled crane or a pump truck, having a multi-bridge chassis, and the engineering vehicle is provided with the drive system according to any one of the above, Technical effects, therefore, the engineering vehicle equipped with the drive system should also have corresponding technical effects, and the specific implementation process is similar to the above embodiment, and will not be described again.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Rights request

A driving system for an engineering vehicle, comprising a multi-level axle provided on the engineering vehicle, wherein the driving system further comprises:

a loading engine (5) provided on the engineering vehicle (100);

a hydraulic motor (16) that is drivingly coupled to a wheel (10) of at least one axle (I ⁵ );

A hydraulic pump (7) for supplying oil to the hydraulic motor (16), the hydraulic pump (7) taking a force from the upper engine (5).

2. The drive system according to claim 1, wherein: the upper vehicle engine (5) is provided with a power take-off port, and the hydraulic pump (7) passes through the power take-off (6) from the Take force to take power.

3. The drive system of claim 2, wherein:

The drive system further includes a hydraulic oil tank (8) and a directional control valve (9);

The oil outlet of the hydraulic pump (7) and the hydraulic oil tank (8) are connected to the inlet and outlet ports of the hydraulic motor (16) through the directional control valve (9).

4. The drive system according to claim 3, characterized in that: the directional control valve (9) is a two-position four-way solenoid valve.

The drive system according to any one of claims 1 to 4, wherein the drive system further comprises:

a lowering engine (1;) provided on the engineering vehicle (100);

a gearbox (2) that is drivingly coupled to the output of the vehicle (1);

a transfer case (4) that is drivingly coupled to at least another stage of the axle (11, 12, 13);

A drive shaft (3) is coupled between the gearbox (2) and the transfer case (4).

6. A driving system for an engineering vehicle, comprising: a multi-level axle and a lowering engine (1;) disposed on the engineering vehicle (100), and a gearbox (Fig. 2) drivingly connected to the lowering engine (1) (2) a transfer case (4) drivingly connected to at least one of the axles (11, 12, 13) and a drive shaft (3) connected between the gearbox (2) and the transfer case (4), wherein the drive system further comprises: (10) connected to the hydraulic motor driving the axle of at least another stage (I ⁵⁾ of the wheel (16); said hydraulic motor (16) of the oil pump ( 7), the hydraulic pump (7) takes a force from the getting off engine (1), the gearbox (2), the transmission shaft (3) or the transfer case (4).

7. The drive system of claim 6 wherein: The lowering engine (1;), the gearbox (2), the transmission shaft (3) or the transfer case (4) is provided with a power take-off port;

The hydraulic pump (7) takes a force from the power take-off port through a power take-off (6).

8. A drive system according to claim 6 or claim 7 wherein:

A construction vehicle, characterized in that the construction vehicle is provided with the drive system according to any one of claims 1 to 8.

The work vehicle according to claim 9, wherein the work vehicle is specifically a wheeled crane.