CN103438044A - Structure for reducing switching frequency of high speed and low speed and machinery vehicle - Google Patents
Structure for reducing switching frequency of high speed and low speed and machinery vehicle Download PDFInfo
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- CN103438044A CN103438044A CN2013104163060A CN201310416306A CN103438044A CN 103438044 A CN103438044 A CN 103438044A CN 2013104163060 A CN2013104163060 A CN 2013104163060A CN 201310416306 A CN201310416306 A CN 201310416306A CN 103438044 A CN103438044 A CN 103438044A
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- low speed
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- switching frequency
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Abstract
The invention discloses a structure for reducing the switching frequency of high speed and low speed and a machinery vehicle, and which belongs to the field of machine manufacture. The structure comprises a traveling motor 2, a pushing rod 1, a reversing valve 4, a working oil path and a pilot oil path, wherein the traveling motor 2 is provided with a switching device; and the pushing rod 1 is connected with the switching device, and drives the switching device to move and. The pushing rod 1 is provided with an oil cavity;, and the reversing valve 4 is provided with a working oil port and a pilot oil port; t. The working oil port is communicated with thean oil cavity of the pushing rod 1 by the working oil path. The structure also comprises a throttling valve which, wherein the throttling valve is arranged at the pilot oil port of the reversing valve 4, and is communicated with the pilot oil port by a control oil path. According to the technical scheme disclosed by the invention, since the throttling valve is added at to the pilot control oil port of the traveling motor for reducing the frequency of automatic switching of high speed and low speed, the frequency of automatic switching of high speed and low speed of the traveling motor can be greatly reduced, so that the wear of an inclined disc and a spherical hinge is reducedalleviated, and the service life of the traveling motor is prolonged. The; and the structure is simple and the installation is convenient.
Description
Technical field
The invention belongs to machinery and manufacture field, relate to a kind of structure that reduces switching frequency, relate in particular to a kind of structure and motor vehicles and machines that reduce the high low speed automatic switchover of running motor frequency.
Background technique
Running motor with high low speed automatic switching function, when motor is in the high speed walking states, if when its load resistance increases to certain value, motor can automatically switch to low speed, to increase moment.When loading on the critical value fluctuation, the motor switching in the high, low speed state continually, thus the wearing and tearing of the component such as the swash plate of the high low speed switching of increasing motor internal control and ball pivot damage running motor.
Traditional method is: strengthen the hardness of swash plate and ball pivot, to reduce wear; Improve the pilot pressure of running motor control port, to reduce the frequency of high low speed switching.
There is following problem in said method: swash plate and ball pivot generally all adopt cast iron and alloy steel material to make, and limited by material and heat treatment process, and its surface hardness improves limited, limited to the effect of reducing wear; And evidence, after improving the pilot pressure of running motor control port, can increase mechanical oil consumption, so this scheme is also inadvisable.
Summary of the invention
In view of this, the present invention is by increasing throttle valve at running motor pilot control hydraulic fluid port, the frequency automatically switched to reduce high low speed, can greatly reduce the frequency that the high low speed of running motor automatically switches, thereby reduce the wearing and tearing of swash plate and ball pivot, improve the working life of running motor, and simple in structure, easy for installation.
For achieving the above object, concrete technological scheme is as follows:
On the one hand, a kind of structure that reduces high low speed switching frequency is provided, comprise running motor, push rod, selector valve, working oil path and guide's oil circuit, described running motor is provided with COMM communication, described push rod is connected with described COMM communication and drives described COMM communication to move, described push rod is provided with oil pocket, described selector valve is provided with actuator port and guide's hydraulic fluid port, described actuator port communicates with the oil pocket of described push rod by working oil path, also comprise throttle valve, described throttle valve is located at guide's oil port of described selector valve, described throttle valve communicates with described guide's hydraulic fluid port by oil circuit control.
Preferably, also comprise one-way valve, described one-way valve and described throttle valve form one-way throttle valve.
Preferably, described COMM communication is swash plate, and described swash plate and described running motor are hinged, and described running motor is by switching between the high low speed of being rotated in of described swash plate.
Preferably, described swash plate twists with described running motor and is connected by ball.
Preferably, also be provided with spring between described swash plate and described running motor.
Preferably, also be provided with equilibrium valve, described equilibrium valve is connected with described selector valve.
On the other hand, also provide a kind of motor vehicles and machines, comprised the structure of the high low speed switching frequency of minimizing as above.
With respect to prior art, the advantage of technological scheme of the present invention has:
1, greatly reduce the frequency that the high low speed of running motor automatically switches, thereby reduce the wearing and tearing of swash plate and ball pivot, the working life of improving running motor;
2, simple in structure, easy for installation.
The accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the structural representation of the running motor of the embodiment of the present invention.
Wherein, 1 is that push rod, 2 is that running motor, 3 is that one-way throttle valve, 4 is that selector valve, 5 is that equilibrium valve, 6 is that swash plate, 7 is that ball pivot, 8 is spring.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment who obtains, belong to the scope of protection of the invention.
It should be noted that, in the situation that do not conflict, embodiment and the feature in embodiment in the present invention can combine mutually.
Below with reference to accompanying drawing, embodiments of the invention are done to concrete explaination.
A kind of structure that reduces high low speed switching frequency of embodiments of the invention as shown in figs. 1 and 2, comprise running motor 2, push rod 1, selector valve 4, working oil path and guide's oil circuit.Running motor 2 is provided with COMM communication, and push rod 1 is connected with COMM communication and drives COMM communication to move.Push rod 1 is provided with oil pocket, and selector valve 4 is provided with actuator port and guide's hydraulic fluid port.Actuator port communicates with the oil pocket of push rod 1 by working oil path.Also comprise throttle valve, throttle valve is located at guide's oil port of selector valve 4, and throttle valve communicates with guide's hydraulic fluid port by oil circuit control.
Embodiments of the invention are by increasing throttle valve at running motor pilot control hydraulic fluid port, the frequency automatically switched to reduce high low speed, can greatly reduce the frequency that the high low speed of running motor automatically switches, thereby reduce the wearing and tearing of swash plate and ball pivot, improve the working life of running motor, and simple in structure, easy for installation.
As shown in figs. 1 and 2, in an embodiment of the present invention, when running motor 2 control port PT mouths have pressure, selector valve 4 is switched to right position, will enter the oil pocket of push rod 1 from the pressure oil of actuator port A/B mouth, make push rod 1 action, promote swash plate 6 and rotate around ball pivot 7, reduce the tilt angle of swash plate 6, make running motor in top gear.
If its walking resistance increases, the principal pressure of A/B mouth will raise.When surpassing setting value, the principal pressure oil that enters the control port of selector valve 4 by equilibrium valve 5 will promote selector valve 4 actions, make it be switched to left position, pressure oil in push rod 1 oil pocket will pressure release, push rod 1 resets, swash plate 6 will rotate around ball pivot 7 under the promotion of spring 8, increases the swash plate angle, returns to lower-speed state.If now principal pressure fluctuates near setting value, inner selector valve is constantly action just, and swash plate is ceaselessly rotated around ball pivot, thus the wearing and tearing that strengthen swash plate and ball pivot.
Embodiments of the invention are provided with one-way throttle valve 3 at the pilot control hydraulic fluid port of selector valve 4.When principal pressure reaches setting value, when the spool of promotion selector valve 4 moves to the right, because of the throttling action of one-way throttle valve 3, selector valve 4 needs just can be switched to after a while right position.If one-way throttle valve 3 adopts throttle valve, the action that the selector valve 4 that in like manner can delay to commutate switches left.In the time of so just can reducing principal pressure and fluctuate near setting value, the frequency that the high low speed of running motor 2 automatically switches.
Also comprise a kind of motor vehicles and machines in embodiments of the invention, be provided with the structure of the high low speed switching frequency of minimizing described above.Because the structure of the high low speed switching frequency of above-mentioned minimizing has above-mentioned technique effect, therefore, the motor vehicles and machines that are provided with this structure that reduces high low speed switching frequency also should possess corresponding technique effect, and its specific implementation process is similar to the above embodiments, does not hereby repeat.
Above specific embodiments of the invention be have been described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (7)
1. a structure that reduces high low speed switching frequency, comprise running motor (2), push rod (1), selector valve (4), working oil path and guide's oil circuit, described running motor (2) is provided with COMM communication, described push rod (1) is connected with described COMM communication and drives described COMM communication to move, described push rod (1) is provided with oil pocket, described selector valve (4) is provided with actuator port and guide's hydraulic fluid port, described actuator port communicates with the oil pocket of described push rod (1) by working oil path, it is characterized in that, also comprise throttle valve, described throttle valve is located at guide's oil port of described selector valve (4), described throttle valve communicates with described guide's hydraulic fluid port by oil circuit control.
2. the structure of the high low speed switching frequency of minimizing as claimed in claim 1, is characterized in that, also comprises one-way valve, and described one-way valve and described throttle valve form one-way throttle valve (3).
3. the structure of the high low speed switching frequency of minimizing as claimed in claim 2, it is characterized in that, described COMM communication is swash plate (6), and described swash plate (6) is hinged with described running motor (2), and described running motor (2) switches by being rotated between high low speed of described swash plate (6).
4. the structure of the high low speed switching frequency of minimizing as claimed in claim 3, is characterized in that, described swash plate (6) twists (7) by ball and is connected with described running motor (2).
5. the structure of the high low speed switching frequency of minimizing as claimed in claim 4, is characterized in that, between described swash plate (6) and described running motor (2), also is provided with spring (8).
6. the structure of the high low speed switching frequency of minimizing as claimed in claim 5, is characterized in that, also is provided with equilibrium valve (5), and described equilibrium valve (5) is connected with described selector valve (4).
7. motor vehicles and machines, is characterized in that, comprises the structure of the high low speed switching frequency of minimizing as described as claim 1 to 6 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104163060A CN103438044A (en) | 2013-09-12 | 2013-09-12 | Structure for reducing switching frequency of high speed and low speed and machinery vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104163060A CN103438044A (en) | 2013-09-12 | 2013-09-12 | Structure for reducing switching frequency of high speed and low speed and machinery vehicle |
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| CN103438044A true CN103438044A (en) | 2013-12-11 |
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| CN2013104163060A Pending CN103438044A (en) | 2013-09-12 | 2013-09-12 | Structure for reducing switching frequency of high speed and low speed and machinery vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485071A (en) * | 2015-12-07 | 2016-04-13 | 北京航空航天大学 | Cabin door transient actuating device based on valve control variable displacement motor and driving method |
| CN107795538A (en) * | 2017-12-01 | 2018-03-13 | 徐工集团工程机械有限公司 | Running motor shift valve, running motor and engineering machinery |
| CN107975509A (en) * | 2017-12-27 | 2018-05-01 | 徐工集团工程机械有限公司 | Running motor integrates valve deck and running motor |
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2013
- 2013-09-12 CN CN2013104163060A patent/CN103438044A/en active Pending
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485071A (en) * | 2015-12-07 | 2016-04-13 | 北京航空航天大学 | Cabin door transient actuating device based on valve control variable displacement motor and driving method |
| CN105485071B (en) * | 2015-12-07 | 2017-10-31 | 北京航空航天大学 | Hatch door transient state acting device and driving method based on valve control variable displacement motor |
| CN107795538A (en) * | 2017-12-01 | 2018-03-13 | 徐工集团工程机械有限公司 | Running motor shift valve, running motor and engineering machinery |
| CN107795538B (en) * | 2017-12-01 | 2023-09-08 | 江苏徐工工程机械研究院有限公司 | Walking motor gear shifting valve, walking motor and engineering machinery |
| CN107975509A (en) * | 2017-12-27 | 2018-05-01 | 徐工集团工程机械有限公司 | Running motor integrates valve deck and running motor |
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Application publication date: 20131211 |