CN114873111A - Valve control two-stage slow descending system and method for garbage truck with detachable carriage - Google Patents
Valve control two-stage slow descending system and method for garbage truck with detachable carriage Download PDFInfo
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- CN114873111A CN114873111A CN202210149390.3A CN202210149390A CN114873111A CN 114873111 A CN114873111 A CN 114873111A CN 202210149390 A CN202210149390 A CN 202210149390A CN 114873111 A CN114873111 A CN 114873111A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000009467 reduction Effects 0.000 claims abstract description 62
- 230000002457 bidirectional effect Effects 0.000 claims description 16
- 230000004044 response Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 45
- 230000003139 buffering effect Effects 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F3/00—Vehicles particularly adapted for collecting refuse
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Abstract
The invention discloses a valve control two-stage slow descending system and a method of a garbage truck with a detachable carriage, wherein an angle sensor is arranged on an external main arm in the valve control two-stage slow descending system, the angle sensor is electrically connected with a control unit, and the control unit is respectively and electrically connected with a first speed reducing unit and a second speed reducing unit; one end of the second speed reducing unit is connected with an oil tank of the lifting oil cylinder through a pipeline, the other end of the second speed reducing unit is connected with one end of the first speed reducing unit through a pipeline, and the other end of the first speed reducing unit is connected with an oil cylinder of the lifting oil cylinder through a pipeline; the valve control double-stage slow descending system method is realized through the system. The invention can realize twice speed reduction, so that the box body falls slowly.
Description
Technical Field
The invention relates to a valve control two-stage slow descending system and method for a garbage truck with a detachable carriage, and belongs to the technical field of garbage trucks with detachable carriages.
Background
The garbage truck with the detachable carriage has the advantages that due to the fact that the load is heavy, the garbage truck can obviously impact the auxiliary frame when the box body falls, obvious noise pollution is caused, fatigue damage of the auxiliary frame can be caused by frequent impact, and the service life is shortened obviously.
At present, two main solutions are provided for the problem in the industry, one is buffering in an oil cylinder, a buffering device is added at the tail end of the oil cylinder to weaken the falling kinetic energy of a box body, and the impact on an auxiliary frame is reduced. The in-cylinder buffering has high requirements on the machining level of the oil cylinders, the consistency of the two oil cylinders is not easy to guarantee, and the oil cylinder machining cost is high. The other one is throttling buffering, and the flow of an oil return system of a main arm oil cylinder is reduced by adding a special throttling device, so that the falling speed of the box body is reduced, and the impact is reduced. The method is not good in performance under the heavy-load working condition, on one hand, if the throttle orifice is too small, the falling speed of the box body is too slow, the whole working efficiency is influenced, on the other hand, if the throttle orifice is too large, the speed reduction effect cannot be achieved, and the caliber of the throttle orifice is difficult to grasp.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a valve-controlled two-stage slow descending system and a method for a garbage truck with a detachable carriage, which can realize two-time speed reduction and enable a box body to slowly fall.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
on one hand, the invention provides a valve-controlled two-stage slow descending system of a garbage truck with a detachable carriage, which comprises a first speed reducing unit, a second speed reducing unit, a lifting oil cylinder, an angle sensor and a control unit, wherein the first speed reducing unit is connected with the second speed reducing unit through a pipeline;
an angle sensor is arranged on the external main arm and electrically connected with a control unit, and the control unit is electrically connected with the first speed reduction unit and the second speed reduction unit respectively; one end of the second speed reducing unit is connected with an oil tank of the lifting oil cylinder through a pipeline, the other end of the second speed reducing unit is connected with one end of the first speed reducing unit through a pipeline, and the other end of the first speed reducing unit is connected with an oil cylinder of the lifting oil cylinder through a pipeline.
Further, the first speed reduction unit comprises a bidirectional balance valve, an adjustable throttle valve and a speed reduction trigger electromagnetic valve;
the speed reduction trigger electromagnetic valve is connected with the adjustable throttle valve;
the adjustable throttle valve and the bidirectional balance valve are connected in parallel.
Pipeline connecting oil cylinder after convergence of throttle orifice of adjustable throttle valve and valve port of bidirectional balance valve
Further, the second reduction unit includes a pilot pressure reduction control valve and a proportional valve;
the pilot pressure reduction control valve is connected with the proportional valve;
one end of the valve port of the proportional valve is connected with an oil tank of the lifting oil cylinder, and the other end of the valve port of the proportional valve is connected with the first speed reduction unit through a pipeline.
Further, the second deceleration unit comprises a three-way flow valve; the three-way flow valve is characterized in that a first valve port pipeline is connected with an oil return port of an oil tank, a second valve port pipeline is connected with an oil inlet, a third valve port pipeline is connected with a feedback valve, and the feedback valve is connected with an oil drainage port.
Further, the second reduction unit includes a main relief valve; the main overflow valve is arranged between the oil return port and the three-way flow valve.
Further, the second reduction unit includes a pressure reducing valve; the pressure reducing valve is arranged between the oil inlet and the pilot pressure reducing control valve.
On the other hand, the invention provides a valve-controlled two-stage slow descending method of a carriage-detachable garbage truck, which is realized by adopting the valve-controlled two-stage slow descending system of the carriage-detachable garbage truck.
Further, the valve-controlled double-stage slow descending method of the garbage truck with the detachable carriage comprises the following steps:
presetting a first deceleration angle and a second deceleration angle, wherein the second deceleration angle is smaller than the first deceleration angle;
responding to the first deceleration angle, electrifying the deceleration trigger electromagnetic valve and opening a throttling opening of the adjustable throttling valve, wherein the caliber of the throttling opening is smaller than that of a valve port of the bidirectional balance valve, returning oil and throttling to finish the first slow descending of the box body;
and responding to the second speed reduction angle, reducing the current flowing through the pilot pressure reduction control valve according to the preset current variation, controlling the reversing amplitude of the proportional valve by the pilot pressure reduction control valve according to the current variation, reducing the opening degree of a valve port of the proportional valve, returning oil and throttling, and finishing the second time of slowly lowering the box body.
Compared with the prior art, the invention has the following beneficial effects:
the double-layer speed reduction is realized through the first speed reduction unit and the second speed reduction unit, the double-layer speed reduction device is suitable for the heavy-load working condition of the garbage truck with the detachable carriage, and is high in efficiency and strong in practicability.
Drawings
Fig. 1 is a schematic structural view illustrating a valve-controlled two-stage descent control system of a garbage truck with a detachable carriage according to an embodiment of the present invention;
fig. 2 is a schematic structural view illustrating a valve-controlled two-stage descent control system of a garbage truck with a detachable carriage according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a valve-controlled dual-stage descent control method for a garbage truck with a detachable carriage according to an embodiment of the present invention;
in the figure: 1. a first reduction unit; 2. a second reduction unit; 3. a main arm; 4. a box body; 5. an oil cylinder; 6. an angle sensor; 7. an auxiliary frame; 11. an adjustable throttle valve; 12. the electromagnetic valve is triggered in a deceleration way; 13. a bi-directional balancing valve; 21. a main overflow valve; 22. a pressure reducing valve; 23. a three-way flow valve; 24. a pilot pressure reducing control valve; 25. a proportional valve; 26. a feedback valve; 31. an oil return port; 32 oil inlet; 33. an oil drainage port.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1
The embodiment provides a valve-controlled two-stage descent control system of a garbage truck with a detachable carriage, and with reference to fig. 1, the system comprises a first speed reduction unit 1, a second speed reduction unit 2, a lifting oil cylinder, an angle sensor 6 and a control unit.
The first speed reducing unit 1 and the second speed reducing unit 2 are both electrically connected with the control unit, the control unit is electrically connected with the angle sensor 6, the angle sensor 6 is installed on the main arm 3, and the main arm 3 is connected with the box body 4 through a shackle.
Referring to fig. 2, one end of the second deceleration unit 2 is connected to the oil tank of the lift cylinder through a pipeline, the other end of the second deceleration unit is connected to one end of the first deceleration unit 1 through a pipeline, and the other end of the first deceleration unit 1 is connected to the oil cylinder 5 of the lift cylinder through a pipeline.
In application, one end of the lifting oil cylinder is installed on the main arm 3, the other end of the lifting oil cylinder is installed on the auxiliary frame 7, and the second speed reduction unit 2 is arranged on the auxiliary frame 7.
The double-layer speed reduction is realized through the first speed reduction unit and the second speed reduction unit, the double-layer speed reduction device is suitable for the heavy-load working condition of the garbage truck with the detachable carriage, and is high in efficiency and strong in practicability.
Example 2
On the basis of embodiment 1, the present embodiment describes first reduction unit 1 and second reduction unit 2 in detail.
Referring to fig. 2, the first reduction unit 1 of the present embodiment includes a bidirectional balance valve 13, an adjustable throttle valve 11, and a reduction activation solenoid valve 12. Wherein, the deceleration triggering electromagnetic valve 12 is connected with the adjustable throttle valve 11; the adjustable throttle valve 11 and the bidirectional balance valve 13 are connected in parallel. The pipeline is connected with the oil cylinder 5 after the throttling port of the adjustable throttle valve 11 and the valve port of the bidirectional balance valve 13 are converged.
In application, a first deceleration angle and a second deceleration angle are preset, wherein the second deceleration angle is smaller than the first deceleration angle.
When the included angle between the main arm 3 and the auxiliary frame 7 is larger than the first deceleration angle and the deceleration triggering electromagnetic valve 12 is not powered, the adjustable throttle valve 11 is in a closed state, and hydraulic oil flows back to the second deceleration unit 2 through the bidirectional balance valve 13 because the pressure of the hydraulic oil is larger than the pressure preset value of the bidirectional balance valve 13.
When the angle sensor 6 detects that the included angle between the main arm 3 and the auxiliary frame 7 is smaller than or equal to a first deceleration angle, the angle sensor 6 transmits a signal to the control unit, the control unit controls the deceleration triggering electromagnetic valve 12 to be electrified, so that the throttling opening of the adjustable throttle valve 11 is opened, hydraulic oil flows back to the second deceleration unit 2 through the adjustable throttle valve 11, oil return throttling is performed, the first slow descending of the box body is completed, at the moment, the pressure of the hydraulic oil is smaller than the pressure preset value of the two-way balance valve 13, and the two-way balance valve 13 is in a closed state.
Referring to fig. 2, the second reduction unit 2 includes a pilot pressure reduction control valve 24, a proportional valve 25, a three-way flow valve 23, a main relief valve 21, and a pressure reduction valve 22. Wherein, the pilot pressure reduction control valve 24 is connected with a proportional valve 25, one end of the valve port of the proportional valve 25 is connected with the oil tank of the lifting oil cylinder, and the other end is connected with the first speed reduction unit 1 through a pipeline.
In application, when the device is in an initial state, the current flowing through the pilot pressure reduction control valve 24 is the upper limit value of the preset proportional control current value, and the valve port of the proportional valve 25 is in a full-open state.
When the angle sensor 6 detects that the included angle between the main arm 3 and the auxiliary frame 7 is smaller than or equal to the second deceleration angle, the angle sensor 6 transmits a signal to the control unit, the control unit reduces the magnitude of the current flowing through the pilot pressure reduction control valve 24 according to the preset current variation, the pilot pressure reduction control valve 24 controls the reversing amplitude of the proportional valve 25 according to the current variation, the opening degree of the valve port of the proportional valve 25 is reduced, oil return throttling is performed, and the second slow descent box body is completed.
When the three-way flow valve 23 is used in the embodiment, a first valve port pipeline of the three-way flow valve 23 is connected with an oil return port 31 of an oil tank, a second valve port pipeline is connected with an oil inlet 32, a third valve port pipeline is connected with a feedback valve 26, and the feedback valve 26 is connected with an oil drainage port 33. The differential pressure between the front of the proportional valve 25 and the rear of the proportional valve is ensured to be constant, and the flow of hydraulic oil is smoother and controllable when the opening of the valve port of the proportional valve 25 is adjusted.
The main overflow valve 21 is arranged between the oil return port 31 and the three-way flow valve 23, and the valve port of the main overflow valve 21 is adjusted through the movement of the valve core of the main overflow valve 21, so that the proportional speed regulation of hydraulic oil is realized.
The pressure reducing valve 22 is provided between the oil inlet 32 and the pilot pressure reducing control valve 24, and supplies pilot pressure for the change in the opening degree of the valve port of the proportional valve 25.
When the included angle between the main arm 3 and the auxiliary frame 7 is smaller than or equal to a first deceleration angle, the angle sensor 6, the control unit, the bidirectional balance valve 13, the adjustable throttle valve 11 and the deceleration trigger electromagnetic valve 12 are matched with each other to realize first deceleration; when the included angle between the main arm 3 and the auxiliary frame 7 is smaller than or equal to the second deceleration angle, the pilot pressure reduction control valve 24, the proportional valve 25, the three-way flow valve 23, the main overflow valve 21 and the pressure reduction valve 22 are matched with each other, so that the secondary deceleration can be realized, the deceleration proportion can be adjusted according to the actual requirement, the deceleration angle and the current variation can be adjusted, the buffering speed can be adjusted, and the applicability is improved.
Example 3
The embodiment describes a valve-controlled two-stage descent control method for a carriage-detachable garbage truck, which is implemented by using the valve-controlled two-stage descent control system for the carriage-detachable garbage truck described in embodiment 2, and with reference to fig. 3, the method includes the following steps:
s1, presetting a first deceleration angle and a second deceleration angle, wherein the second deceleration angle is smaller than the first deceleration angle;
in application, the present embodiment also presets the amount of change in current flowing through the pilot pressure reduction control valve 24 in response to the second deceleration angle; the upper limit value of the proportional control current value; and balancing the pressure value of the valve in two directions.
S2, responding to the first speed reduction angle, powering on the speed reduction trigger electromagnetic valve 12 and opening a throttling port of the adjustable throttle valve 11, wherein the caliber of the throttling port is smaller than that of a valve port of the bidirectional balance valve 13, returning oil and throttling to finish the first slow descending of the box body;
and S3, responding to the second deceleration angle, reducing the current flowing through the pilot pressure reduction control valve 24 according to the preset current variation, controlling the reversing amplitude of the proportional valve 25 by the pilot pressure reduction control valve 24 according to the current variation, reducing the opening degree of the valve port of the proportional valve 25, returning oil and throttling, and completing the second slow descending of the box body.
The invention can adjust the first deceleration angle and the second deceleration angle according to the actual situation; a change amount of current flowing through the pilot pressure reduction control valve in response to the second deceleration angle; the upper limit value of the proportional control current value; and the pressure value of the bidirectional balance valve realizes accurate speed reduction.
In conclusion, the double-speed reduction control system can realize double speed reduction, can adjust the speed reduction proportion and the buffering speed according to actual needs, and improves the control efficiency.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A valve-controlled two-stage slow descending system of a garbage truck with a detachable carriage is characterized by comprising a first speed reducing unit (1), a second speed reducing unit (2), a lifting oil cylinder, an angle sensor (6) and a control unit;
an angle sensor (6) is arranged on the external main arm, the angle sensor (6) is electrically connected with a control unit, and the control unit is respectively and electrically connected with the first speed reduction unit (1) and the second speed reduction unit (2); one end of the second speed reducing unit (2) is connected with an oil tank of the lifting oil cylinder through a pipeline, the other end of the second speed reducing unit is connected with one end of the first speed reducing unit (1) through a pipeline, and the other end of the first speed reducing unit (1) is connected with an oil cylinder (5) of the lifting oil cylinder through a pipeline.
2. The valve-controlled double-stage descent control system for the garbage truck with the detachable carriage as claimed in claim 1, wherein the first deceleration unit (1) comprises a bidirectional balance valve (13), an adjustable throttle valve (11) and a deceleration triggering solenoid valve (12);
the speed reduction trigger electromagnetic valve (12) is connected with the adjustable throttle valve (11);
the pipeline of the adjustable throttle valve (11) is connected with the pipeline of the bidirectional balance valve (13) in parallel;
and the pipeline is connected with the oil cylinder (5) after the throttling port of the adjustable throttling valve (11) and the valve port of the bidirectional balance valve (13) are converged.
3. The valve-controlled two-stage descent control system for a car-detachable garbage truck according to claim 2, wherein the second deceleration unit (2) comprises a pilot pressure reduction control valve (24) and a proportional valve (25);
the pilot pressure reduction control valve (24) is connected with a proportional valve (25);
one end of the valve port of the proportional valve (25) is connected with an oil tank of the lifting oil cylinder, and the other end of the valve port of the proportional valve is connected with the first speed reducing unit (1) through a pipeline.
4. The valve-controlled two-stage descent control system for a car-detachable garbage truck according to claim 3, wherein the second deceleration unit (2) comprises a three-way flow valve (23); a first valve port pipeline of the three-way flow valve (23) is connected with an oil return port (31) of the oil tank, a second valve port pipeline is connected with an oil inlet (32), a third valve port pipeline is connected with a feedback valve (26), and the feedback valve (26) is connected with an oil drainage port (33).
5. The valve-controlled two-stage descent control system for a garbage truck with a detachable car according to claim 1, wherein the second reduction unit (2) comprises a main overflow valve (21); the main overflow valve (21) is arranged between the oil return port (31) and the three-way flow valve (23).
6. The valve-controlled two-stage descent control system for a garbage truck with a detachable car according to claim 3, wherein the second deceleration unit (2) comprises a pressure reducing valve (22); the pressure reducing valve (22) is arranged between the oil inlet (32) and the pilot pressure reducing control valve (24).
7. A valve-controlled two-stage descent control method for a garbage truck with a detachable carriage is characterized by being realized by adopting the valve-controlled two-stage descent control system of the garbage truck with the detachable carriage according to claim 3.
8. The valve-controlled two-stage descent control method for the garbage truck with the detachable carriage as claimed in claim 7, comprising the steps of:
presetting a first deceleration angle and a second deceleration angle, wherein the second deceleration angle is smaller than the first deceleration angle;
in response to the first deceleration angle, the deceleration trigger electromagnetic valve (12) is electrified and opens a throttling opening of the adjustable throttling valve (11), the caliber of the throttling opening is smaller than that of a valve port of the bidirectional balance valve (13), and oil return throttling is performed to finish the first slow descent of the box body;
and responding to the second deceleration angle, reducing the current flowing through the pilot pressure reduction control valve (24) according to a preset current variation, controlling the reversing amplitude of the proportional valve (25) by the pilot pressure reduction control valve (24) according to the current variation, reducing the opening degree of the valve port of the proportional valve (25), returning and throttling, and completing the second slow descent of the tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149390.3A CN114873111B (en) | 2022-02-18 | 2022-02-18 | Valve control two-stage slow descent system and method for carriage-detachable garbage truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149390.3A CN114873111B (en) | 2022-02-18 | 2022-02-18 | Valve control two-stage slow descent system and method for carriage-detachable garbage truck |
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| Publication Number | Publication Date |
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| CN114873111A true CN114873111A (en) | 2022-08-09 |
| CN114873111B CN114873111B (en) | 2024-04-09 |
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| CN202210149390.3A Active CN114873111B (en) | 2022-02-18 | 2022-02-18 | Valve control two-stage slow descent system and method for carriage-detachable garbage truck |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010004723A1 (en) * | 1999-12-16 | 2001-06-21 | Toyota Jidosha Kabushiki Kaisha | Vehicle deceleration control apparatus and control method thereof |
| CN101870270A (en) * | 2010-05-12 | 2010-10-27 | 三一重机有限公司 | Mine self-discharging vehicle carriage floating descending control device |
| CN103754804A (en) * | 2014-01-23 | 2014-04-30 | 杭州爱知工程车辆有限公司 | Buffer control system of hydraulic aerial cage |
| CN106089828A (en) * | 2016-08-05 | 2016-11-09 | 杭州流控机器制造有限公司 | A kind of hydraulic control circuit for dumper |
| CN211663978U (en) * | 2019-12-26 | 2020-10-13 | 深圳东风汽车有限公司 | Self-unloading angle-adjustable hydraulic system of self-loading and unloading type garbage truck |
-
2022
- 2022-02-18 CN CN202210149390.3A patent/CN114873111B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010004723A1 (en) * | 1999-12-16 | 2001-06-21 | Toyota Jidosha Kabushiki Kaisha | Vehicle deceleration control apparatus and control method thereof |
| CN101870270A (en) * | 2010-05-12 | 2010-10-27 | 三一重机有限公司 | Mine self-discharging vehicle carriage floating descending control device |
| CN103754804A (en) * | 2014-01-23 | 2014-04-30 | 杭州爱知工程车辆有限公司 | Buffer control system of hydraulic aerial cage |
| CN106089828A (en) * | 2016-08-05 | 2016-11-09 | 杭州流控机器制造有限公司 | A kind of hydraulic control circuit for dumper |
| CN211663978U (en) * | 2019-12-26 | 2020-10-13 | 深圳东风汽车有限公司 | Self-unloading angle-adjustable hydraulic system of self-loading and unloading type garbage truck |
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| CN114873111B (en) | 2024-04-09 |
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