CN102991347A - Engineering vehicle and travelling driving system thereof - Google Patents
Engineering vehicle and travelling driving system thereof Download PDFInfo
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- CN102991347A CN102991347A CN2012104930335A CN201210493033A CN102991347A CN 102991347 A CN102991347 A CN 102991347A CN 2012104930335 A CN2012104930335 A CN 2012104930335A CN 201210493033 A CN201210493033 A CN 201210493033A CN 102991347 A CN102991347 A CN 102991347A
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 51
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 230000033001 locomotion Effects 0.000 claims abstract description 15
- 239000003921 oil Substances 0.000 claims description 78
- 230000008859 change Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000009347 mechanical transmission Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 1
- 238000009439 industrial construction Methods 0.000 description 1
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Abstract
The invention discloses an engineering vehicle and a driving system thereof. The driving system comprises an engine, a hydraulic pump connected with the engine, a hydraulic oil cylinder which is driven to extend and contract by the hydraulic pump, and a conversion device arranged between the hydraulic oil cylinder and a driving wheel, wherein the conversion device is used for converting the reciprocating linear motion of the hydraulic oil cylinder into the rotational motion. According to the travelling driving system provided by the invention, a driving motor with a complicated structure is not required to be used, and the hydraulic oil cylinder has the advantages of being simple in structure as well as high in power transmission efficiency and power transmission reliability. Therefore, the travelling driving system is low in cost, small in kinetic energy loss, simple in later maintenance and high in use reliability.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to an engineering vehicle and a driving running system thereof.
Background
In recent years, as the progress of industrial construction is accelerated, the application of engineering vehicles is becoming more widespread. The speed of the vehicle is also required to be increased correspondingly, which puts higher requirements on the reliability of a driving running system of the engineering vehicle.
At present, a driving system of an engineering vehicle mainly has three modes, namely mechanical transmission, hydraulic mechanical transmission and hydrostatic transmission. Wherein, the power transmission route of mechanical transmission is: the driving running system has the advantages of simple structure, convenient manufacture and high mechanical transmission efficiency. The power transmission route of the hydraulic mechanical transmission is as follows: compared with mechanical transmission, the transmission mode has the advantages that the hydraulic torque converter is added, so that the gear of the transmission can be properly reduced, a driver can conveniently control the working decoration with the effort, and the vehicle speed can automatically adapt to load change. The power transmission route of hydrostatic transmission is as follows: engine-hydraulic pump-hydraulic motor-balance box-driving wheel, compared with hydraulic mechanical transmission, said mode can make the machine obtain different traction performance according to different combination of pump and motor. However, such a drive traveling system has drawbacks in that: the structure is complicated, the maintenance is not easy, and the reliability needs to be improved.
Disclosure of Invention
In view of this, the invention provides a driving system with simple structure, easy maintenance and high reliability.
The invention provides a driving system, comprising: an engine; a hydraulic pump connected to the engine; the hydraulic oil cylinder is driven by the hydraulic pump to extend and retract; and the conversion device is arranged between the hydraulic oil cylinder and the driving wheel and is used for converting the reciprocating linear motion of the hydraulic oil cylinder into rotary motion.
Further, the drive running system further includes a balance box provided between the switching device and the drive wheel.
Further, the drive traveling system further includes: and the reversing device is arranged between the hydraulic pump and the hydraulic oil cylinder and is used for controlling the extension and the retraction of the hydraulic oil cylinder.
Further, the commutation apparatus comprises: the first oil way is communicated with an oil outlet of the hydraulic pump and an oil port at one end of the hydraulic oil cylinder; the second oil way is communicated with an oil return port of the hydraulic pump and an oil port at the other end of the hydraulic oil cylinder; the reversing valve is arranged on the first oil way and the second oil way, the reversing valve has three working states, when the reversing valve is in a first working state, the first oil way is used as an oil supply oil way, and the second oil way is used as an oil return oil way; when the reversing valve is in a second working state, the first oil way and the second oil way stop oil supply and oil return; when the reversing valve is in a third working state, the first oil way is used as an oil return oil way, and the second oil way is used as an oil supply oil way.
Further, the reversing valve is an electromagnetic reversing valve.
Furthermore, the number of the hydraulic oil cylinders is two or more.
Further, the driving wheel is a front wheel driving wheel or a rear wheel driving wheel.
Further, the conversion device is a crank block device.
The invention also provides an engineering vehicle which is provided with the driving running system.
Further, the engineering vehicle is a land leveler.
The invention provides a driving system, which is provided with an engine, a hydraulic pump, a hydraulic oil cylinder and a conversion device. Compared with the existing driving system, the driving system provided by the invention does not need to use a driving motor with a complex structure. Compared with a driving motor, the hydraulic oil cylinder has the advantages of simple structure, high power transmission efficiency and high reliability. Therefore, the driving system provided by the invention has the advantages of low cost, small kinetic energy loss, simple later maintenance and high use reliability.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a driving system according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a driving system according to embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of a driving system according to embodiment 3 of the present invention.
Description of reference numerals:
1 engine 2 hydraulic pump
3 reversing valve and 4 hydraulic oil cylinder
41 left hydraulic cylinder and 42 right hydraulic cylinder
5 left driving wheel of driving wheel 51
52 right driving wheel 6 conversion device
61 left conversion device 62 right conversion device
7 balance box
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Preferred embodiments of the present invention will be further described with reference to the accompanying drawings.
Fig. 1 shows a driving running system provided in embodiment 1 of the present invention, which is used for a construction vehicle. The drive traveling system includes: the hydraulic control system comprises an engine 1, a hydraulic pump 2, a reversing device, a hydraulic oil cylinder 4, a conversion device 6 and a driving wheel 5. Wherein,
the hydraulic pump 2 is connected with the engine 1;
the hydraulic pump 2 drives the hydraulic oil cylinder 4 to extend and retract;
the conversion device 6 is arranged between the hydraulic oil cylinder 4 and the driving wheel 5, and the conversion device 6 is used for converting the reciprocating linear motion of the hydraulic oil cylinder 4 into rotary motion;
the reversing device is used for controlling the extension and the retraction of the hydraulic oil cylinder 4, and comprises:
the first oil path a is communicated with an oil outlet of the hydraulic pump 2 and one end of the hydraulic oil cylinder;
a second oil path b communicated with an oil return port of the hydraulic pump 2 and the other end of the hydraulic oil cylinder;
the reversing valve 3 is arranged on the first oil path a and the second oil path b, the reversing valve 3 has three working states, when the reversing valve 3 is in the first working state, the first oil path a is used as an oil supply path, and the second oil path b is used as an oil return path; in a second working state, the first oil way a and the second oil way b stop oil supply and oil return; in the third working state, the first oil path a is used as an oil return path, and the second oil path b is used as an oil supply path.
The working principle of the driving running system provided by the embodiment is as follows:
starting the engine 1, driving the hydraulic pump 2 to rotate by the engine, and converting mechanical energy into hydraulic energy in the process;
the hydraulic pump 2 supplies oil and returns oil to the hydraulic oil cylinder 4, the hydraulic oil cylinder 4 is made to reciprocate along a straight line through the reversing device, and in the process, hydraulic energy is converted into mechanical energy;
the conversion device 6 converts the reciprocating linear motion of the hydraulic oil cylinder 4 into rotary motion, and then drives the driving wheel 5 to rotate, and in the process, the mechanical energy of the linear motion is converted into the mechanical energy of the rotary motion, so that the driving effect of driving the wheels to run is achieved.
In this embodiment, the number of the hydraulic cylinders 4 is one, and the hydraulic cylinders are connected with a driving wheel 5 on one side (left side or right side) of the engineering vehicle. The number of the hydraulic oil cylinders 4 is preferably two or more, and the hydraulic oil cylinders are used for being connected with driving wheels on the left side and the right side of the engineering vehicle.
Furthermore, it will be appreciated by those skilled in the art that the hydraulic rams 4 may be connected to the drive wheels of the front wheels via the switch 6 or may be connected to the drive wheels of the rear wheels via the switch 6. Those skilled in the art may select the particular operating conditions and load conditions.
The conversion device has the following functions: the linear motion of the hydraulic pump oil cylinder 4 is converted into rotary motion, and then the hydraulic pump 4 drives the driving wheel to rotate. In view of the complicated structure of the hydraulic components, the conversion device is preferably a mechanical conversion device in the embodiment of the present invention, and specifically, a crank block structure or the like known to those skilled in the art may be adopted. If a crank-slider structure is adopted, one end of a crank is hinged with the hydraulic oil cylinder 4, and the slider is hinged with the driving wheel.
As can be appreciated by those skilled in the art, the two ends of the hydraulic cylinder are respectively a rod cavity and a rodless cavity of the hydraulic cylinder. Taking fig. 1 as an example, the first oil path a is communicated with a rodless cavity of a hydraulic oil cylinder, the second oil path b is communicated with a rod cavity of the hydraulic oil cylinder, the reversing valve 3 is a three-position four-way reversing valve, the conversion device is a slider-crank mechanism, and the control process of the reversing device is as follows:
when the vehicle needs to move forward, the three-position four-way reversing valve is controlled to be in an upper position, the hydraulic pump 2 supplies oil to a rodless cavity of the hydraulic oil cylinder 4 through a first oil way a, and hydraulic oil in a rod cavity of the hydraulic oil cylinder 4 returns oil through a second oil way b; a piston rod of the hydraulic oil cylinder 4 extends out and is converted into kinetic energy for enabling the driving wheel to rotate forwards through the conversion device, and the driving wheel rotates forwards for half a circle; then, controlling the three-position four-way reversing valve to be at a lower position, supplying oil to a rod cavity of the hydraulic pump 2 by the hydraulic pump 2 through a second oil way b, and returning hydraulic oil in a rodless cavity of the hydraulic oil cylinder 4 through a first oil way a; the piston rod of the hydraulic oil cylinder 4 retracts, and the driving wheel continues to rotate forwards for half a circle, so that the forward rotation of the wheel is completed. The vehicle can move forward by repeating the steps.
When the vehicle needs to move backwards, the three-position four-way reversing valve line is controlled to be at the lower position, and the three-position four-way reversing valve is controlled to be at the upper position after the wheel rotates for half a circle.
When the vehicle is required to stop, the three-position four-way reversing valve line is controlled to be in the middle position, the movement of the hydraulic oil cylinder 4 is stopped at the moment, and correspondingly, the wheels also stop moving.
In contrast to the existing drive running system, the drive running system provided by the present embodiment uses a drive motor and a conversion device instead of the drive motor. Compared with a driving motor, the hydraulic oil cylinder has the advantages of simple structure, high power transmission efficiency and high reliability. Therefore, the driving running system provided by the embodiment has the advantages of low cost, small kinetic energy loss, simple later maintenance and high use reliability.
Fig. 2 shows a configuration of a drive traveling system provided in embodiment 2 of the present invention. This example differs from example 1 in that:
the hydraulic cylinders are respectively a left hydraulic cylinder 41 and a right hydraulic cylinder 42 and are driven by one hydraulic pump, and correspondingly, the driving wheels and the conversion devices are also two and respectively comprise a left driving wheel 51, a left conversion device 61, a right driving wheel 52 and a right conversion device 62. The left hydraulic cylinder 41 is connected to the left drive wheel 51 via a left switching device 61, and the right hydraulic cylinder 42 is connected to the drive wheel 52 via a right switching device 62. One end of each of the left hydraulic oil cylinder 41 and the right hydraulic oil cylinder 42 is communicated with the first oil path a, and the other end is communicated with the second oil path b. The advantage of this embodiment is that the structure is comparatively simple.
Fig. 3 shows a configuration of a drive traveling system provided in embodiment 3 of the present invention. The present embodiment differs from embodiment 2 in that:
the drive running system further comprises a balancing tank 7, which balancing tank 7 is arranged between the switching device 6 and the drive wheels 5. The function of this balancing tank 7 is: the balance is adjusted, so that the vehicle cannot incline when running on a complex road surface, the construction stability is ensured, and the working efficiency is improved; in addition, the balance box 7 can enable power transmission to be more stable and support the load at the tail of the vehicle.
The driving running system provided by the embodiment is particularly suitable for a land scraper.
It should be noted that, in the above embodiment:
the reversing valve can be a hydraulic control reversing valve, an electric control reversing valve or a mechanical control reversing valve. In the embodiment of the invention, the reversing valve is preferably an electromagnetic reversing valve.
The number of the hydraulic pumps can be 1 (as shown in the embodiment), namely, one hydraulic pump drives the hydraulic oil cylinders on two sides of the vehicle simultaneously; or 2, i.e. each hydraulic pump drives a hydraulic ram on one side of the vehicle.
The hydraulic system formed by the hydraulic pump and the hydraulic oil cylinder can be a closed hydraulic system (figures 2 and 3) or an open hydraulic system.
As can be seen from the above, the driving travel system provided by the embodiment of the present invention uses the driving motor and the switching device instead of the driving motor. Compared with a driving motor, the hydraulic oil cylinder has the advantages of simple structure, high power transmission efficiency and high reliability. Therefore, the driving system provided by the embodiment of the invention has the advantages of low cost, small kinetic energy loss, simple later maintenance and high use reliability.
The embodiment of the invention also provides an engineering vehicle, which is provided with any one of the driving running systems, and as any one of the driving running systems has the technical effects, the engineering machine provided with the driving running system also has corresponding technical effects, and the specific implementation process of the engineering vehicle is similar to that of the embodiment, and is not repeated. The work machine is preferably a grader because the drive system has the advantage of high power transmission efficiency.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A powered travel system, comprising:
an engine (1);
a hydraulic pump (2) connected to the engine (1);
a hydraulic oil cylinder (4) driven by the hydraulic pump (2) to extend and retract;
the conversion device (6) is arranged between the hydraulic oil cylinder (4) and the driving wheel (5), and the conversion device (6) is used for converting the reciprocating linear motion of the hydraulic oil cylinder (4) into rotary motion.
2. The drive running system according to claim 1, further comprising a balancing tank (7), the balancing tank (7) being disposed between the switching device (6) and the drive wheel (5).
3. The drive running system according to claim 1, further comprising: and the reversing device is arranged between the hydraulic pump (2) and the hydraulic oil cylinder (4) and is used for controlling the extension and retraction of the hydraulic oil cylinder (4).
4. The drive traveling system according to claim 3, wherein the reversing device comprises:
the first oil way is communicated with an oil outlet of the hydraulic pump (2) and an oil port at one end of the hydraulic oil cylinder (4);
the second oil way is communicated with an oil return port of the hydraulic pump (2) and an oil port at the other end of the hydraulic oil cylinder (4);
the reversing valve (3) is arranged on the first oil path and the second oil path, the reversing valve (3) has three working states, when the reversing valve (3) is in the first working state, the first oil path is used as an oil supply path, and the second oil path is used as an oil return path; when the reversing valve (3) is in a second working state, the first oil way and the second oil way stop oil supply and oil return; when the reversing valve (3) is in a third working state, the first oil way is used as an oil return oil way, and the second oil way is used as an oil supply oil way.
5. The drive running system according to claim 4, wherein the direction change valve (3) is a solenoid direction change valve (3).
6. The drive running system according to claim 1, wherein the number of the hydraulic cylinders (4) is two or more.
7. The drive running system according to claim 1, wherein the drive wheel (5) is a front wheel drive wheel or a rear wheel drive wheel.
8. The drive running system according to any one of claims 1 to 7, wherein the conversion means (6) is a crank block device.
9. A working vehicle, characterized in that a drive running system according to any one of claims 1 to 8 is provided.
10. The work vehicle of claim 9, wherein the work vehicle is a grader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210493033.5A CN102991347B (en) | 2012-11-28 | 2012-11-28 | Engineering truck and driving driving system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210493033.5A CN102991347B (en) | 2012-11-28 | 2012-11-28 | Engineering truck and driving driving system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102991347A true CN102991347A (en) | 2013-03-27 |
| CN102991347B CN102991347B (en) | 2015-09-02 |
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ID=47920640
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210493033.5A Active CN102991347B (en) | 2012-11-28 | 2012-11-28 | Engineering truck and driving driving system thereof |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405412A (en) * | 2001-09-14 | 2003-03-26 | 三一重工股份有限公司 | Hydrostatic drive land leveller |
| US20050210873A1 (en) * | 2004-03-29 | 2005-09-29 | Fuji Jukogyo Kabushiki Kaisha | Driving force distribution apparatus for right and left wheels |
| CN2777231Y (en) * | 2003-12-24 | 2006-05-03 | 闫学富 | Combination type low-speed hydraulic motor |
| CN201124757Y (en) * | 2007-10-27 | 2008-10-01 | 福田雷沃国际重工股份有限公司 | Full hydraulic drive loading type tractor |
| CN201723359U (en) * | 2010-07-05 | 2011-01-26 | 王英平 | Hydraulic engine |
| CN202944205U (en) * | 2012-11-28 | 2013-05-22 | 三一重工股份有限公司 | Engineering vehicle and drive traveling system thereof |
-
2012
- 2012-11-28 CN CN201210493033.5A patent/CN102991347B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405412A (en) * | 2001-09-14 | 2003-03-26 | 三一重工股份有限公司 | Hydrostatic drive land leveller |
| CN2777231Y (en) * | 2003-12-24 | 2006-05-03 | 闫学富 | Combination type low-speed hydraulic motor |
| US20050210873A1 (en) * | 2004-03-29 | 2005-09-29 | Fuji Jukogyo Kabushiki Kaisha | Driving force distribution apparatus for right and left wheels |
| CN201124757Y (en) * | 2007-10-27 | 2008-10-01 | 福田雷沃国际重工股份有限公司 | Full hydraulic drive loading type tractor |
| CN201723359U (en) * | 2010-07-05 | 2011-01-26 | 王英平 | Hydraulic engine |
| CN202944205U (en) * | 2012-11-28 | 2013-05-22 | 三一重工股份有限公司 | Engineering vehicle and drive traveling system thereof |
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| Publication number | Publication date |
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| CN102991347B (en) | 2015-09-02 |
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