CN201475086U - Hydrostatic traveling system speed reduction buffering hydraulic device - Google Patents
Hydrostatic traveling system speed reduction buffering hydraulic device Download PDFInfo
- Publication number
- CN201475086U CN201475086U CN2009203079217U CN200920307921U CN201475086U CN 201475086 U CN201475086 U CN 201475086U CN 2009203079217 U CN2009203079217 U CN 2009203079217U CN 200920307921 U CN200920307921 U CN 200920307921U CN 201475086 U CN201475086 U CN 201475086U
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- pump
- relief valve
- speed reduction
- valve
- hydraulic device
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Abstract
The utility model relates to an aircraft luggage conveyer belt vehicle, in particular to a hydrostatic traveling system speed reduction buffering hydraulic device which comprises a traveling motor, a traveling pump, a slippage pump and an overflow valve, and is characterized in that the overflowing valve and an electromagnetic change-over valve are connected in parallel between the traveling pump and the slippage pump, the overflow valve is connected with the electromagnetic change-over valve in series for enabling the electromagnetic change-over valve to control the pressure of the overflow valve, thereby realizing the speed reduction buffering effect, reducing the brake force of a hydrostatic driving system, reducing the abrasion of a drive bridge, and satisfying the requirement of driving comfort. Through adopting the structure, the hydrostatic traveling system speed reduction buffering hydraulic device has the advantages of reasonable structure, small brake force and small abrasion.
Description
Technical field
The utility model relates to the air baggage conveyor belt vehicle, specifically a kind of quiet liquid running gear deceleration buffer hydraulic pressure installation.
Background technique
The air baggage conveyor belt vehicle is a kind ofly shipping parcels can be sent to aircraft cabin or be sent to the machinery on ground from aircraft cabin, can travel on the aircraft parking.
As everyone knows, the quiet liquid running gear of air baggage conveyor belt vehicle is by running motor, walking pump, slippage pump and relief valve are formed, as shown in Figure 1, walking pump one end is connected with running motor through oil circuit A, the other end is connected with running motor through oil circuit B, oil circuit A is provided with slippage pump, be provided with relief valve 4 between slippage pump and the walking pump, oil circuit B is provided with relief valve 3, on the aircraft parking, advance at utmost speed and subtract throttle when travelling, running motor becomes the pattern work of oil hydraulic pump under effect of inertia, produce the opposite pressure oil of direction when advancing, and this moment is owing to subtract throttle, the rotating speed decline of motor with acceleration, the rotating speed of walking pump descends thereupon, and at this moment the pressure oil that is produced by running motor can only be released by the relief valve of pumping pressure hydraulic fluid port; And existing quiet liquid running gear is in order to guarantee the requirement of climbable gradient, the setting pressure of relief valve is bigger, this will be to normally causing very big braking force, thereby reduce driving comfortability and ransaxle is caused additional wear, adopting relief valve 3 to realize pressure releasing, is to realize pressure releasing by relief valve 4 during reversing.
Because there is above-mentioned deficiency in existing running gear when subtracting throttle in the process of advancing at utmost speed, and in the using process user is impacted, and has reduced the life-span of ransaxle, has increased Tyte Wear and power consumption.
Summary of the invention
When advancing at utmost speed, existing quiet liquid running gear subtracts throttle in order to overcome, reduce operation comfort and reduce the deficiency in ransaxle life-span, the utility model provides a kind of quiet liquid walking deceleration buffer hydraulic pressure installation, when this device subtracts throttle in car load advances at utmost speed process, the braking force of quiet liquid transmission system be can reduce automatically, driving comfortability and the requirement of avoiding the ransaxle additional wear satisfied.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of quiet liquid running gear deceleration buffer hydraulic pressure installation, form by running motor, walking pump, slippage pump and relief valve, it is characterized in that relief valve in parallel and solenoid directional control valve between walking pump and the slippage pump, relief valve is connected with solenoid directional control valve, so that the pressure of solenoid directional control valve control relief valve is realized the effect of deceleration buffer, reduce the braking force of quiet liquid transmission system, reduce the wearing and tearing of ransaxle, satisfy driving comfortability.
The beneficial effects of the utility model are: owing to be provided with the less relief valve of pressure between walking pump and slippage pump, when car load advances at utmost speed in the process open out, running motor is owing to a large amount of fluid that effect of inertia produces are released from the less relief valve of pressure, car load is not produced or produces less braking force, thereby reduce travelling comfort decline that fast braking causes and tire, ransaxle wear problems, the utility model is applicable to the baggage conveyor car, and the equipment and the vehicle that adopt quiet liquid driven high-speed to travel.
Description of drawings
Fig. 1 is the prior art constructions schematic representation.
Among the figure: 1. walking pump, 2. slippage pump, 3. relief valve, 4. relief valve, 5. running motor.
Fig. 2 is a structural representation of the present utility model.
Among the figure: 1. walking pump, 2. slippage pump, 3. relief valve, 4. relief valve, 5. running motor, 6. relief valve, 7. solenoid directional control valve.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further specified:
In Fig. 2, a kind of quiet liquid running gear deceleration buffer hydraulic pressure installation, be by running motor 5, walking pump 1, slippage pump 2 and relief valve (3,4) form, running motor 5, walking pump 1, slippage pump 2 and relief valve (3,4) structure and annexation are same as the prior art, this does not give unnecessary details, it is characterized in that relief valve 6 in parallel and solenoid directional control valve 7 between walking pump 1 and the slippage pump 2, relief valve 6 is connected with solenoid directional control valve 7, so that the pressure of solenoid directional control valve 7 control relief valves 6, realize the effect of deceleration buffer, reduce the braking force of quiet liquid transmission system, reduce the wearing and tearing of ransaxle, satisfy driving comfortability.
When car load advances, the oil circuit B of walking pump 1 is a high pressure oil, running motor 5 rotating drive car loads advance, solenoid directional control valve 7, relief valve 6 is located between walking pump 1 and the slippage pump, because the oil circuit A of walking pump 1 is low voltage side at this moment, the pressure of walking pump 1 is consistent with the outlet pressure of slippage pump, and relief valve 6 is failure to actuate, if subtract throttle this moment, because running motor 5 becomes the pump pattern under effect of inertia, and walking pump 1 descends owing to subtracting the throttle engine speed, and oil circuit B pressure descends, and oil circuit A pressure increases, a large amount of fluid by motor 5 from oil circuit B pump to oil circuit A, because it is very little that be arranged on relief valve 6 setting pressures of oil circuit A this moment, so thereby the fluid of oil circuit A release by relief valve 6 and can not produce or produce less braking force motor, when car load retreats, solenoid directional control valve 7 dead electricity, relief valve 6 is inoperative.
The utility model is owing to adopt said structure, efficiently solves that to subtract the braking force that throttle produces when the air baggage delivery vehicle advances at utmost speed excessive, influences driving comfortability and ransaxle wear problems, have rational in infrastructure, advantage such as braking force is little, wearing and tearing are little.
Claims (1)
1. a quiet liquid running gear deceleration buffer hydraulic pressure installation is made up of running motor, walking pump, slippage pump and relief valve, it is characterized in that relief valve in parallel and solenoid directional control valve between walking pump and the slippage pump, and relief valve is connected with solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203079217U CN201475086U (en) | 2009-08-13 | 2009-08-13 | Hydrostatic traveling system speed reduction buffering hydraulic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203079217U CN201475086U (en) | 2009-08-13 | 2009-08-13 | Hydrostatic traveling system speed reduction buffering hydraulic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201475086U true CN201475086U (en) | 2010-05-19 |
Family
ID=42411333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203079217U Expired - Fee Related CN201475086U (en) | 2009-08-13 | 2009-08-13 | Hydrostatic traveling system speed reduction buffering hydraulic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201475086U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107878779A (en) * | 2016-09-30 | 2018-04-06 | 中国国际海运集装箱(集团)股份有限公司 | Pick platform and the lift truck with the platform that picks |
-
2009
- 2009-08-13 CN CN2009203079217U patent/CN201475086U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107878779A (en) * | 2016-09-30 | 2018-04-06 | 中国国际海运集装箱(集团)股份有限公司 | Pick platform and the lift truck with the platform that picks |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20150813 |
|
| EXPY | Termination of patent right or utility model |