CN218463517U - Lifting control system and dump truck - Google Patents
Lifting control system and dump truck Download PDFInfo
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- CN218463517U CN218463517U CN202221633832.3U CN202221633832U CN218463517U CN 218463517 U CN218463517 U CN 218463517U CN 202221633832 U CN202221633832 U CN 202221633832U CN 218463517 U CN218463517 U CN 218463517U
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Abstract
The utility model relates to a lift control system and tipper, including hydraulic pressure source, first switching-over valve, second switching-over valve, locking hydro-cylinder, lift hydro-cylinder, first control valve, second control valve, first limit valve and fluid source; the output end of the hydraulic source is respectively connected with the input ends of the two reversing valves, and the two reversing valves respectively control the lifting of the container and the loosening of the container door; the control ends of the two control valves can be controlled externally; the output end of the first control valve is connected with the control end of the first reversing valve; the output end of the second control valve is connected with the control end of the second reversing valve; the output end of the fluid source is respectively connected with the input ends of the two first control valves, and the input end of the second control valve is connected with the output end of the first limiting valve; when the locking oil cylinder loosens the container door, the input end and the output end of the first limiting valve can be conducted, so that the lifting oil cylinder acts, when an operator forgets to loosen the container door, the container cannot be lifted, and the container can be prevented from being overturned.
Description
Technical Field
The utility model belongs to the technical field of vehicle safety, a control system and tipper lift is related to.
Background
The dump truck generally comprises a cargo box and a lifting system, wherein a lifting oil cylinder in the lifting system can lift the cargo box to enable the cargo box to incline at a certain angle, so that the cargo in the cargo box can be dumped.
The container generally includes a container body, a container back door and a locking mechanism, the container body is used for placing goods, the container door is mounted on the container body, and the locking mechanism is connected with the container back door and used for controlling locking or loosening the container back door, wherein when the container back door is loosened, the container back door can be opened, so that the goods in the container body can be poured out from the container back door.
The related technology discloses a rear door locking mechanism of a dumper, which is characterized in that the rear door locking mechanism of the dumper is changed from a mechanical locking mechanism to a pneumatic hydraulic locking mechanism, so that rollover, casualties and the like possibly caused by misoperation of opening or closing a rear door of a container are avoided. The locking mechanism drives the corresponding locking hook to move through the locking oil cylinder so as to lock or unlock a rear door of the container.
However, the locking mechanism and the lifting system in the technology are mutually independent, when a user forgets to loosen the rear door of the container and lifts the container through the lifting system, the goods cannot be poured out, and the container is easily tipped.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that: the lifting control system and the dump truck are provided aiming at the problems that in the related technology, a locking mechanism and a lifting system are mutually independent, and when a user forgets to loosen a rear door of a container and lifts the container through the lifting system, the container is easy to tip over.
In order to solve the above technical problem, an embodiment of the present invention provides a lifting control system, including a hydraulic source, a first directional control valve, a second directional control valve, a locking cylinder, a lifting cylinder, a first control valve, a second control valve, a first limit valve, and a fluid source; the output end of the hydraulic source is respectively connected with the input end of the first reversing valve and the input end of the second reversing valve; the output end of the first reversing valve is connected with the locking oil cylinder and used for controlling the locking oil cylinder to act so as to lock or loosen the container door of the container; the output end of the second reversing valve is connected with the lifting oil cylinder and used for controlling the lifting oil cylinder to act so as to lift or lower the container; the control end of the first control valve and the control end of the second control valve can be controlled externally; the output end of the first control valve is connected with the control end of the first reversing valve; the output end of the second control valve is connected with the control end of the second reversing valve; the output end of the fluid source is respectively connected with the input end of the first control valve and the input end of the first limiting valve; the input end of the second control valve is connected with the output end of the first limiting valve; the locking oil cylinder can control the control end of the first limit valve, so that the input end of the first limit valve is connected with the output end of the first limit valve when the container door is loosened, and the input end of the first limit valve is disconnected with the output end of the first limit valve when the container door is locked.
Optionally, the fluid source is a gas source.
Optionally, the lift control system further comprises a second limit valve; the input end of the second limit valve is connected with the output end of the first limit valve; the output end of the second limiting valve is connected with the input end of the second control valve; when the lifting oil cylinder lifts the cargo box to move to a preset position, the control end of the second limiting valve can be controlled, so that the input end of the second limiting valve is disconnected with the output end of the second limiting valve.
Optionally, the hydraulic source comprises an oil tank and an oil pump; an oil delivery port of the oil tank is connected with an input end of the oil pump, and an output end of the oil pump is respectively connected with an input end of the first reversing valve and an input end of the second reversing valve; and an oil return port of the oil tank is respectively connected with an oil return end of the first reversing valve and an oil return end of the second reversing valve.
Optionally, the hydraulic source further comprises a tee joint; a first interface of the three-way joint is connected with an oil return port of the oil tank; a second connector of the three-way joint is connected with an oil return end of the first reversing valve; and a third interface of the three-way joint is connected with an oil return end of the second reversing valve.
Optionally, the first reversing valve is a manual reversing valve or an electromagnetic reversing valve; the second reversing valve is a manual reversing valve or an electromagnetic reversing valve.
Optionally, the first direction valve and the second direction valve have the same structure.
Optionally, the first direction valve is an O-type direction valve.
Optionally, the first control valve and the second control valve have the same structure.
In order to solve the above technical problem, an embodiment of the present invention further provides a dump truck, including any one of the above lifting control systems.
In the lifting control system and the dump truck provided by the embodiment of the utility model, when the locking oil cylinder loosens the cargo tank door, the control end of the first limit valve can be controlled, so that the input end of the first limit valve is conducted with the output end of the first limit valve; when the locking oil cylinder locks the container door, the input end of the first limit valve is not communicated with the output end of the first limit valve. In the embodiment, the lifting oil cylinder can act only when the container door is loosened, so that the container cannot be lifted when an operator forgets to loosen the container door, and the container can be prevented from tipping.
Drawings
Fig. 1 is a schematic diagram of a lift control system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a first directional valve of a lift control system according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
100. a lift control system; 1. a hydraulic source; 11. an oil tank; 12. an oil pump; 2. a first direction changing valve; 3. a second directional control valve; 4. locking the oil cylinder; 5. lifting the oil cylinder; 6. a first control valve; 7. a second control valve; 8. A first limit valve; 9. a fluid source; 10. a second limit valve.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1, in one embodiment, the dump truck includes a cargo box and a lift control system 100, the lift control system 100 being coupled to the cargo box for lifting or lowering the cargo box. The container comprises a container body and a container door, wherein the container body is used for placing goods, and the container door is arranged on the container body. The lift control system 100 lifts or lowers the cargo box primarily to lift or lower the body of the cargo box. When the lifting control system 100 lifts the cargo box body, one end of the cargo box body may be raised to dump the cargo; when the lift control system 100 lowers the container body, it is primarily to reposition the lifted container body. In addition, the lifting control system 100 is also used to control the locking or unlocking of the cargo box door, wherein when the cargo box door is unlocked, the cargo box door can be opened, at this time, the cargo in the cargo box body can be poured out from the cargo box door, and when the cargo box door is locked, the cargo box door cannot be opened. In addition, the cargo box door can be a rear cargo box door or a side cargo box door.
As shown in fig. 1 and 2, in one embodiment, the lift control system 100 includes a hydraulic source 1, a first direction changing valve 2, a second direction changing valve 3, a lock cylinder 4, a lift cylinder 5, a first control valve 6, a second control valve 7, a first limit valve 8, and a fluid source 9. The output end of the hydraulic source 1 is respectively connected with the input end of the first reversing valve 2 and the input end of the second reversing valve 3; the output end of the first reversing valve 2 is connected with the locking oil cylinder 4 and used for controlling the locking oil cylinder 4 to act so as to lock or loosen the container door of the container; the output end of the second reversing valve 3 is connected with the lifting oil cylinder 5 and is used for controlling the lifting oil cylinder 5 to act so as to lift or lower the cargo box; the control end of the first control valve 6 and the control end of the second control valve 7 can receive external control, wherein the external control mainly refers to user control; the output end of the first control valve 6 is connected with the control end of the first reversing valve 2; the output end of the second control valve 7 is connected with the control end of the second reversing valve 3; the output end of the fluid source 9 is respectively connected with the input end of the first control valve 6 and the input end of the first limit valve 8; the input end of the second control valve 7 is connected with the output end of the first limit valve 8.
In this embodiment, by controlling the first control valve 6, the input end and the output end of the first control valve 6 can be conducted, and at this time, the fluid of the fluid source 9 can flow to the control end of the first direction valve 2, so as to perform force application control on the valve element of the first direction valve 2, so as to control whether the input end of the first direction valve 2 and the output end of the first direction valve 2 are conducted. When the input end of the first reversing valve 2 is communicated with the output end of the first reversing valve 2, the liquid of the hydraulic source 1 can enter the locking oil cylinder 4, and then the locking oil cylinder 4 is controlled to act, so that the piston rod of the locking oil cylinder 4 extends or retracts.
Through controlling the second control valve 7, the input end and the output end of the second control valve 7 can be conducted, at this time, if the input end of the first limit valve 8 is conducted with the output end of the first limit valve 8, the fluid of the fluid source 9 can flow to the control end of the second reversing valve 3 after sequentially passing through the first limit valve 8 and the second control valve 7, and then the valve core of the second reversing valve 3 is subjected to force application control so as to control whether the input end of the second reversing valve 3 is conducted with the output end of the second reversing valve 3. When the input end of the second reversing valve 3 is connected with the output end of the second reversing valve 3, the liquid of the hydraulic source 1 can enter the lifting oil cylinder 5, so as to control the lifting oil cylinder 5 to act, and a piston rod of the lifting oil cylinder 5 extends or retracts.
In addition, in this embodiment, the locking oil cylinder 4 can control the control end of the first limit valve 8 to control the connection and disconnection between the input end of the first limit valve 8 and the output end of the first limit valve 8. Specifically, when the locking oil cylinder 4 releases the cargo box door, the control end of the first limit valve 8 can be controlled, so that the input end of the first limit valve 8 is communicated with the output end of the first limit valve 8; when the locking oil cylinder 4 locks the container door, the input end of the first limit valve 8 and the output end of the first limit valve 8 are not conducted. That is, in the present embodiment, the lifting cylinder 5 is operated only when the container door is released, so that the container cannot be lifted when the operator forgets to release the container door, and thus the container can be prevented from tipping.
When the goods need to be dumped, the control mode of the lifting control system 100 may be: the first control valve 6 controls the first reversing valve 2 to act so that the locking oil cylinder 4 releases the cargo tank door, and at the moment, the locking oil cylinder 4 can control the first limiting valve 8 so that fluid of the fluid source 9 can flow to the input end of the second control valve 7; then, the second control valve 7 controls the second reversing valve 3 to act, so that the lifting oil cylinder 5 lifts the cargo box body. When the goods are dumped and the container needs to be reset, the control mode of the lifting control system 100 can be as follows: firstly, the second control valve 7 controls the second reversing valve 3 to reverse, so that the lifting oil cylinder 5 lowers a cargo box; then the first control valve 6 controls the first reversing valve 2 to reverse, so that the locking oil cylinder 4 locks the container door.
In this embodiment, the locking cylinder 4 can be actuated to lock and unlock the container door in the prior art. In addition, the lifting and lowering of the cargo box by the lift cylinder 5 may be performed in the prior art.
As shown in fig. 1, in one embodiment, the hydraulic pressure source 1 includes an oil tank 11 and an oil pump 12; wherein, the oil delivery port of the oil tank 11 is connected with the input end of the oil pump 12, and the output end of the oil pump 12 is respectively connected with the input end of the first reversing valve 2 and the input end of the second reversing valve 3, so as to convey the oil in the oil tank 11 to the first reversing valve 2 and the second reversing valve 3 through the oil pump 12. In addition, an oil return port of the oil tank 11 is connected to an oil return end of the first direction valve 2 and an oil return end of the second direction valve 3, respectively, so that oil can be returned from the first direction valve 2 and the second direction valve 3 to the oil tank 11.
In addition, the hydraulic source 1 further comprises a three-way joint, wherein the three-way joint is provided with a first interface, a second interface and a third interface which are communicated with each other; the first interface is connected with an oil return port of the oil tank 11, the second interface is connected with an oil return end of the first reversing valve 2, and the third interface is connected with an oil return end of the second reversing valve 3. Therefore, the oil return requirement can be met only by arranging an oil return opening on the oil tank 11, and the processing cost can be reduced.
In one embodiment, the fluid source 9 is a gas source, which can reduce costs.
In one embodiment, as shown in fig. 2, the first directional valve 2 is a three-position valve having a valve spool with a first position, a second position, and a third position with respect to a valve body, wherein in the embodiment shown in fig. 2, the first position is located between the second position and the third position. In addition, the output end of the first reversing valve 2 comprises a first oil delivery port and a second oil delivery port, and the first oil delivery port and the second oil delivery port are respectively connected to the two oil delivery ports of the locking oil cylinder 4. Wherein, the cavity in the cylinder body of the locking oil cylinder 4 is divided into a first cavity and a second cavity by a piston thereof, and the two oil delivery ports are respectively communicated with the first cavity and the second cavity.
In an initial state, the valve core is at a first position, and the input end and the output end of the first reversing valve 2 are not conducted; when the valve core is positioned at the second position, the input end of the first reversing valve 2 is communicated with the first oil delivery port, the oil return end of the first reversing valve 2 is communicated with the second oil delivery port, and at the moment, oil in the oil tank 11 can enter the first cavity of the locking oil cylinder 4 to further push the piston of the locking oil cylinder to move, so that the piston rod extends outwards to loosen the container door, and meanwhile, the oil in the second cavity flows back to the oil tank 11 from the oil return end of the first reversing valve 2; when the valve core is at the third position, the input end of the first reversing valve 2 is communicated with the second oil delivery port, the oil return end of the first reversing valve 2 is communicated with the first oil delivery port, at the moment, oil in the oil tank 11 can enter the second cavity of the locking oil cylinder 4 to further push the piston of the locking oil cylinder to move, so that the piston rod retracts inwards to lock the container door, and meanwhile, the oil in the first cavity flows back to the oil tank 11 from the oil return end of the first reversing valve 2.
In addition, when the control end of the first direction valve 2 is not driven by the outside, the spool of the first direction valve 2 can be driven by a return element such as a spring to move to the first position. In addition, the first direction valve 2 is an O-type direction valve, which has a neutral position maintaining function, so that the locking cylinder 4 can be maintained in a current state when the control end of the first direction valve 2 is not driven by the outside.
In this embodiment, the first direction valve 2 may adopt an existing design, and may be a three-position four-way direction valve, and the like, and in addition, the second direction valve 3 may also be a three-position valve, and the body structure of the second direction valve may be the same as that of the first direction valve 2, and the manner of the second direction valve 3 controlling the extension and retraction of the piston rod of the lifting cylinder 5 may be the same as that of the first direction valve 2 controlling the extension and retraction of the piston rod of the locking cylinder 4.
In an embodiment, the first control valve 6 is a manual directional valve, and at this time, the valve core of the first directional valve 2 is connected with a handle, and a user can adjust the relative position of the valve core and the valve body through the handle to control the on-off of the input end and the output end of the valve core. Of course, in other embodiments, the first control valve 6 may also be an electromagnetic control valve, and in this case, the user may control the on/off of the input end and the output end by controlling the power-on state of the first control valve 6.
In addition, the first control valve 6 is a three-position valve, a valve core of the first control valve 6 can move to a first area, a second area and a third area of the valve body, at this time, an output end of the first control valve 6 comprises a first output port and a second output port, wherein the first output port is connected with a first control end of the first direction valve 2, the second output port is connected with a second control end of the first direction valve 2, and meanwhile, the first control valve 6 is also provided with a fluid discharge port. When the spool of the first control valve 6 is located in the first region, the input end of the first control valve 6 and the output end of the first control valve 6 are disconnected; when the valve core is in the second area, the input end of the first control valve 6 is communicated with the first output port so as to apply force to the first control end of the first reversing valve 2 to control the valve core of the first reversing valve 2 to move to the second position, and meanwhile, the fluid discharge end of the first control valve 6 is communicated with the second output hole; when the valve core is in the third area, the input end of the first control valve 6 is communicated with the second output port so as to apply force to the second control end of the first direction valve 2 to control the valve core of the first direction valve 2 to move to the third position, and meanwhile, the fluid discharge end of the first control valve 6 is communicated with the first output hole.
In the present embodiment, the first control valve 6 may be of an existing design, and may be a three-position four-way selector valve having an O-type neutral function, or the like, and the second control valve 7 may also be a three-position valve, and the body structure of the second control valve 7 may be the same as that of the first control valve 6.
In one embodiment, the first limit valve 8 may be a two-position valve having a spool with an initial position and a working position relative to the valve body. When the valve core of the first limit valve 8 is at the initial position, the input end of the first limit valve 8 and the output end of the second limit valve 10 are disconnected and are not conducted; when the locking oil cylinder 4 loosens the cargo box door, force can be applied to the valve core of the first limit valve 8 so as to enable the valve core to move to the working position, and at the moment, the input end of the first limit valve 8 is conducted with the output end of the second limit valve 10. Of course, in other embodiments, the first limit valve 8 may also be an electromagnetic valve, and when the locking cylinder 4 releases the cargo box door, a control signal may be generated by a corresponding sensor to control the first limit valve 8 to operate, so as to switch the conduction state between the input end of the first limit valve 8 and the output end of the second limit valve 10. In addition, the first limit valve 8 may also be of an existing design.
As shown in fig. 1, in an embodiment, the lift control system 100 further includes a second limit valve 10, and an input end of the second limit valve 10 is connected to an output end of the first limit valve 8; the output end of the second limit valve 10 is connected with the input end of the second control valve 7; when the lifting oil cylinder 5 lifts the cargo box to move to a preset position, the control end of the second limit valve 10 can be controlled, so that the input end of the second limit valve 10 is disconnected with the output end of the second limit valve 10. In this embodiment, the second limit valve 10 and the first limit valve 8 may be of the same design, wherein initially, an input end of the second limit valve 10 and an output end of the second limit valve 10 are communicated so as to enable the fluid of the fluid source 9 to flow to the control end of the second direction valve 3; when the lifting oil cylinder 5 lifts the cargo box and moves to a preset position, the input end of the second limiting valve 10 is disconnected with the output end of the second limiting valve 10, at the moment, the control end of the second reversing valve 3 is not stressed, the valve core of the second reversing valve 3 resets, the input end and the output end of the second reversing valve 3 are disconnected, and at the moment, the lifting oil cylinder 5 can guarantee the current state.
The above-mentioned related designs can also be replaced in other ways, such as:
in other embodiments, the fluid source 9 may be another hydraulic source than the hydraulic source 1.
In other embodiments, the return end of the first direction valve 2 and the return end of the second direction valve 3 may also be connected to a container outside the tank 11, into which the oil flows back from the first direction valve 2 and the second direction valve 3. The oil in the container can then be transferred to the oil tank 11.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A lifting control system is characterized by comprising a hydraulic source, a first reversing valve, a second reversing valve, a locking oil cylinder, a lifting oil cylinder, a first control valve, a second control valve, a first limiting valve and a fluid source;
the output end of the hydraulic source is respectively connected with the input end of the first reversing valve and the input end of the second reversing valve;
the output end of the first reversing valve is connected with the locking oil cylinder and used for controlling the locking oil cylinder to act so as to lock or loosen the container door of the container;
the output end of the second reversing valve is connected with the lifting oil cylinder and used for controlling the lifting oil cylinder to act so as to lift or lower the container;
the control end of the first control valve and the control end of the second control valve can be controlled by the outside;
the output end of the first control valve is connected with the control end of the first reversing valve;
the output end of the second control valve is connected with the control end of the second reversing valve;
the output end of the fluid source is respectively connected with the input end of the first control valve and the input end of the first limiting valve;
the input end of the second control valve is connected with the output end of the first limiting valve;
the locking oil cylinder can control the control end of the first limit valve, so that the input end of the first limit valve is connected with the output end of the first limit valve when the container door is loosened, and the input end of the first limit valve is disconnected with the output end of the first limit valve when the container door is locked.
2. The lift control system of claim 1, wherein the fluid source is a gas source.
3. The lift control system of claim 1, further comprising a second limit valve;
the input end of the second limit valve is connected with the output end of the first limit valve;
the output end of the second limiting valve is connected with the input end of the second control valve;
when the lifting oil cylinder lifts the cargo box to move to a preset position, the control end of the second limiting valve can be controlled, so that the input end of the second limiting valve is disconnected with the output end of the second limiting valve.
4. The lift control system of claim 1, wherein the hydraulic source comprises an oil tank and an oil pump;
an oil delivery port of the oil tank is connected with an input end of the oil pump, and an output end of the oil pump is respectively connected with an input end of the first reversing valve and an input end of the second reversing valve;
and an oil return port of the oil tank is respectively connected with an oil return end of the first reversing valve and an oil return end of the second reversing valve.
5. The lift control system of claim 4, wherein the hydraulic pressure source further comprises a tee fitting;
a first interface of the three-way joint is connected with an oil return port of the oil tank;
a second connector of the three-way joint is connected with an oil return end of the first reversing valve;
and a third interface of the three-way joint is connected with an oil return end of the second reversing valve.
6. The lift control system of claim 1, wherein the first directional valve is a manual directional valve or a solenoid directional valve;
the second reversing valve is a manual reversing valve or an electromagnetic reversing valve.
7. The lift control system of claim 1, wherein the first and second directional valves are identical in construction.
8. The lift control system of claim 1, wherein the first directional valve is an O-type directional valve.
9. The lift control system of claim 1, wherein the first control valve is identical in construction to the second control valve.
10. A dump truck characterized by comprising the lift control system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221633832.3U CN218463517U (en) | 2022-06-28 | 2022-06-28 | Lifting control system and dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221633832.3U CN218463517U (en) | 2022-06-28 | 2022-06-28 | Lifting control system and dump truck |
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| Publication Number | Publication Date |
|---|---|
| CN218463517U true CN218463517U (en) | 2023-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221633832.3U Active CN218463517U (en) | 2022-06-28 | 2022-06-28 | Lifting control system and dump truck |
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| Country | Link |
|---|---|
| CN (1) | CN218463517U (en) |
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2022
- 2022-06-28 CN CN202221633832.3U patent/CN218463517U/en active Active
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