CN112551422A - Loading and unloading platform - Google Patents
Loading and unloading platform Download PDFInfo
- Publication number
- CN112551422A CN112551422A CN202011592571.0A CN202011592571A CN112551422A CN 112551422 A CN112551422 A CN 112551422A CN 202011592571 A CN202011592571 A CN 202011592571A CN 112551422 A CN112551422 A CN 112551422A
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- China
- Prior art keywords
- contact
- working state
- bearing platform
- protective guard
- spring
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/065—Scissor linkages, i.e. X-configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention provides a loading and unloading platform, which comprises a bearing platform, a lifting device, a protective guard, a lapping plate, a first control circuit, a second control circuit, a first driving mechanism and a second driving mechanism, wherein the bottom of the bearing platform is provided with a first contact assembly which is connected on the first control circuit in series; the second contact assembly is arranged at the bottom of the bearing table and connected in series with the second control circuit, so that the second contact assembly can be switched on only when the protective guard descends to a lower working state, and the second control circuit is switched on, namely, only when the protective guard descends to the lower working state, the second control circuit can control the second driving mechanism to act, and the lap joint plate rotates; the action control efficiency is high, the reliability is good, the control structure is simple, and the cost is low.
Description
Technical Field
The invention relates to the field of lifting machinery, in particular to a loading and unloading platform.
Background
The loading and unloading platform is a liftable mechanical device which can help a user to safely and efficiently load and unload trucks with various heights and sizes, when the loading and unloading platform is lifted, the bearing platform of the loading and unloading platform is overlapped at the tail of the truck, so that a carrying forklift can enter the truck from the bearing platform to load and unload goods, and when the loading and unloading platform is lowered, the bearing platform of the loading and unloading platform retracts into a pit, so that the ground is level.
In order to facilitate the lap joint of the bearing platform, the side edge of the bearing platform is provided with a plurality of rotatable lap plates, and in order to improve the safety of the carrying forklift on the bearing platform, two sides of the bearing platform are provided with a plurality of liftable protective guards; when the loading and unloading platform is used, the lifting action of the loading platform, the rotating action of the lapping plate and the lifting action of the protective guard need to be carried out according to steps, so that unsafe phenomena that the lapping plate collides with the edge of a pit or a carrying forklift falls off from the loading platform and the like are avoided, the action control of the existing loading and unloading platform usually adopts a manual operation mode after manual observation, and the mode has low efficiency, easy misoperation and poor reliability; if a program control device such as a PLC and a sensor is purchased for control, the requirement of automatic control can be met, but the circuit design of the whole loading platform is complex and the cost is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the loading and unloading platform which is high in action control efficiency, good in reliability, simple in control structure and low in cost.
In order to achieve the above object, the present invention adopts a technical solution that a loading platform includes:
the bearing platform is arranged in the pit in a lifting manner, and the projection of the bearing platform in the vertical direction is rectangular;
the lifting device is used for driving the bearing table to lift, and the lifting device is an electric lifting device;
the first control circuit is used for controlling the lifting device to act;
the protective guard is of a frame type structure and arranged on the long side of the bearing platform in a lifting mode, the protective guard has an upper working state and a lower working state, when the protective guard is in the upper working state, the upper portion of the protective guard protrudes out of the upper surface of the bearing platform to protect the long side of the bearing platform, and when the protective guard is in the lower working state, the upper end surface of the protective guard is flush with the upper surface of the bearing platform;
the first driving mechanism is used for driving the protective guard to lift;
the lap joint plate is rotatably arranged on the short side of the bearing platform and has an unfolding working state and a folding working state, when the lap joint plate is in the unfolding working state, the upper surface of the lap joint plate is flush with the upper surface of the bearing platform, and when the lap joint plate is in the folding working state, the plane where the lap joint plate is located is vertical to the upper surface of the bearing platform;
the second driving mechanism is used for driving the lap joint plate to rotate so as to enable the lap joint plate to be changed into the unfolding working state or the folding working state;
the second control circuit is used for controlling the second driving mechanism to act;
the bottom of the short side of the bearing table is provided with a first contact assembly which is connected in series with the first control circuit, and when the lapping plate rotates to a folding working state, the lapping plate is communicated with the first contact assembly to enable the first control circuit to be communicated;
and when the protective guard descends to a lower working state, the protective guard is communicated with the second contact assembly, so that the second control circuit is communicated.
Preferably, the broadside of plummer is equipped with downwardly extending's mounting panel, the mounting panel is the insulation board, first contact subassembly is including setting up the first contact and the second contact of mounting panel upper end the overlap joint board rotates to when drawing in operating condition, the upper end and the first contact of overlap joint board, the lower tip and the second contact of overlap joint board make first contact subassembly switch-on.
Further preferably, a first communication strip is arranged on the lapping plate, the first communication strip is a copper strip, the first communication strip and the lapping plate are arranged in an insulating mode, and when the lapping plate rotates to the folding working state, the first communication strip is located on the inner side of the lapping plate and communicated with the first contact and the second contact.
Preferably, the long edge side of the plummer is provided with an outwardly protruding mounting seat, the mounting seat and the plummer are arranged in an insulated manner, the second contact assembly comprises a third contact arranged at the left end of the mounting seat and a fourth contact arranged at the right end of the mounting seat, and when the protective guard descends to a lower working state, the top beam of the protective guard is in contact with the third contact and the fourth contact, so that the second contact assembly is connected.
Further preferably, a second communication strip is arranged on the lower end face of the top cross beam, the second communication strip is a copper strip, and the second communication strip and the top cross beam are arranged in an insulated mode.
Further preferably, the mounting base is made of an insulating material, a metal rod capable of sliding up and down is arranged on the mounting base, annular flanges are arranged at two end portions of the metal rod, the metal rod comprises a first metal rod located at the left end portion of the mounting base and a second metal rod located at the right end portion of the mounting base, the annular flange at the lower end portion of the first metal rod forms the third contact, and the annular flange at the upper end portion of the second metal rod forms the fourth contact.
Further preferably, a spring for driving the metal rod to move upwards is further arranged on the mounting seat, the spring comprises a first spring and a second spring, the first spring is sleeved on the first metal rod, the lower end of the first spring abuts against the top of the mounting seat, the upper end of the first spring abuts against the third contact, the second spring is sleeved on the second metal rod, the lower end of the second spring abuts against the top of the mounting seat, and the upper end of the second spring abuts against the fourth contact.
Preferably, the first driving mechanism comprises a first hydraulic oil cylinder, a cylinder body of the first hydraulic oil cylinder is arranged on a connecting seat extending downwards from the long side of the bearing platform, the connecting seat is located in the middle of the long side of the bearing platform, and a lifting rod of the first hydraulic oil cylinder is connected to the middle of a cross beam at the top of the protective guard.
Preferably, the loading and unloading platform further comprises a guide device for guiding the lifting of the guard railing, the guide device comprises a linear guide rail and a linear slider, the linear guide rail is arranged on the guard railing and is arranged along the vertical direction, two end parts of the linear guide rail are respectively fixed on a top cross beam and a bottom cross beam of the guard railing, and the linear slider is fixed on the side wall of the long side of the bearing platform.
Preferably, the second driving mechanism comprises a second hydraulic cylinder, a cylinder body of the second hydraulic cylinder is rotatably connected to the bottom of the bearing table, and the end part of a lifting rod of the second hydraulic cylinder is rotatably connected to the lapping plate.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention provides a loading and unloading platform, which comprises a bearing platform, a lifting device, a protective guard, a lapping plate, a first control circuit, a second control circuit, a first driving mechanism and a second driving mechanism, wherein the bottom of the bearing platform is provided with a first contact assembly which is connected on the first control circuit in series; the second contact assembly is arranged at the bottom of the bearing table and connected in series with the second control circuit, so that the second contact assembly can be switched on only when the protective guard descends to a lower working state, and the second control circuit is switched on, namely, only when the protective guard descends to the lower working state, the second control circuit can control the second driving mechanism to act, and the lap joint plate rotates; the action control efficiency is high, the reliability is good, the control structure is simple, and the cost is low.
Drawings
Fig. 1 is a schematic front view of a preferred embodiment of the present invention, wherein the platform is not raised, the straps are in a collapsed operational state, and the guard rail is in a lower operational state.
Fig. 2 is a schematic front view of the preferred embodiment of the present invention, with the platform raised, the straps collapsed and the guard rail lowered.
Fig. 3 is a schematic front view of the preferred embodiment of the present invention, with the carrier platform raised, the straps deployed and the protective rail in the upper operative position.
Fig. 4 is a partially enlarged view of a portion a in fig. 2.
Fig. 5 is a front view of the second drive mechanism of fig. 2, with the straps in a closed operating condition.
Fig. 6 is a front view of the second drive mechanism of fig. 2, with the strap in an extended operative position.
Wherein:
10. a bearing table; 11. mounting a plate; 12. a mounting seat; 121. a first metal rod; 122. a second metal rod; 123. an annular flange; 124. a first spring; 125. a second spring; 20. a lifting device; 30. protecting the fence; 31. a top cross beam; 311. an insulating plate; 312. a second communication strip; 32. a bottom cross member; 40. a first hydraulic cylinder; 41. a cylinder body; 42. a jacking rod; 50. a lap plate; 51. an insulating plate; 52. a first communication bar; 60. a second hydraulic cylinder; 61. a cylinder body; 62. a jacking rod; 70. a first contact assembly; 71. a first contact; 72. a second contact; 80. a second contact assembly; 81. a third contact; 82. a fourth contact; 90. a guide device; 91. a linear guide rail; 92. a linear slider.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The up-down direction described in the present invention refers to the up-down direction in fig. 2, and the left-right direction described in the present invention refers to the left-right direction in fig. 2.
As shown in fig. 1-3, the present invention provides a loading dock, comprising: the lifting device comprises a bearing table 10, a lifting device 20, a first control circuit, a guard rail 30, a first driving mechanism, a bridging plate 40, a second driving mechanism, a second control circuit, a first contact assembly 70, a second contact assembly 80 and a guide device 90.
The platform 10 is arranged in the pit in a lifting manner, and the projection of the platform 10 in the vertical direction is rectangular.
The lifting device 20 is used for driving the bearing platform 10 to lift, the lifting device 20 is an electric lifting device, the lifting device 20 includes a support frame, a hydraulic cylinder, an oil pump motor and other components, and the specific connection relationship and the position relationship thereof are the prior art and are not described herein again.
The first control circuit is a control circuit of an oil pump motor of the lifting device 20, and the first control circuit is used for controlling the action of the lifting device.
The guard rail 30 has a frame structure, the guard rail 30 is disposed at a long side of the platform 10 in a liftable manner, the guard rail 30 has an upper working state and a lower working state, when the guard rail 30 is in the upper working state, an upper portion of the guard rail 30 protrudes above an upper surface of the platform 10 to protect the long side of the platform 10, and when the guard rail 30 is in the lower working state, an upper end surface of the guard rail 30 is flush with the upper surface of the platform 10.
The first driving mechanism is used for driving the guard rail 30 to ascend and descend, the first driving mechanism comprises a first hydraulic oil cylinder 40, a cylinder body 41 of the first hydraulic oil cylinder 40 is arranged on a connecting seat 13 extending downwards from the long edge side of the bearing platform 10, the connecting seat 13 is located in the middle of the long edge side of the bearing platform 10, and a lifting rod 42 of the first hydraulic oil cylinder 40 is connected to the middle of a top cross beam 31 of the guard rail 30.
The lap plate 50 is rotatably disposed on the short side of the platform 10, the lap plate 50 has an unfolding operation state and a folding operation state, when the lap plate 50 is in the unfolding operation state, the upper surface of the lap plate 50 is flush with the upper surface of the platform 10, and when the lap plate 50 is in the folding operation state, the plane on which the lap plate 50 is located is perpendicular to the upper surface of the platform 10.
The second driving mechanism is used for driving the bridging plate 50 to rotate, so that the bridging plate 50 can be changed to an unfolding working state or a folding working state, the second driving mechanism comprises a second hydraulic cylinder 60, an oil pump and an oil pump motor which are matched with the second hydraulic cylinder 60, a cylinder body 61 of the second hydraulic cylinder 60 is rotatably connected to the bottom of the bearing platform 10, and the end part of a lifting rod 62 of the second hydraulic cylinder 60 is rotatably connected to the bridging plate 50.
The second control circuit is a control circuit of the oil pump motor of the second hydraulic cylinder 60, and the second control circuit is used for controlling the second hydraulic cylinder 60 to act.
The first contact assembly 70 is disposed at the bottom of the short side of the platform 10, the first contact assembly 70 is connected in series to the first control circuit, and when the strap 50 rotates to the closed operating state, the strap 50 connects the first contact assembly 70, so that the first control circuit is connected, and the platform 10 can be driven by the lifting device 20 to lift.
The second contact assembly 80 is installed at the bottom of the long side of the platform 10, the second contact assembly 80 is connected in series to the second control circuit, when the guard rail 30 is lowered to the lower operation state, the top beam 31 of the guard rail 30 is connected to the second contact assembly 80, the second control circuit is connected, and the lap plate 50 can be changed from the expansion operation state to the contraction operation state by the driving of the second hydraulic cylinder 60.
In order to facilitate installation and improve connectivity between the strap 50 and the first contact assembly 70 in the closed operating state, the short side of the platform 10 is provided with a downwardly extending mounting plate 11, the mounting plate 11 is an insulating plate, the first contact assembly 70 comprises a first contact 71 and a second contact 72 which are arranged at the upper end of the mounting plate 11, the strap 50 is provided with a first connecting strip 52, the first connecting strip 52 is a copper strip, the first connecting strip 52 is connected to the strap 50 through the insulating plate 51, so that the first connecting strip 52 is arranged in an insulating manner with respect to the strap 50, when the strap 50 is rotated to the closed operating condition, the first communication bar 52 is positioned inside the strap 50, the upper end portion of the first communication bar 52 contacts the first contact 71, the lower end portion of the first communication bar 52 contacts the second contact 72, thereby communicating the first contact 71 and the second contact 72 to close the first contact assembly 70.
In order to facilitate installation and improve connectivity between the guard rail 30 and the second contact assembly 80 in the lower working state, an outwardly protruding mounting seat 12 is disposed on a long side of the carrier platform 10, the mounting seat 12 is made of an insulating material, so that the mounting seat 12 is disposed in an insulating manner with respect to the carrier platform 10, a metal rod capable of sliding up and down is disposed on the mounting seat 12, two end portions of the metal rod are provided with annular flanges 123, the metal rod comprises a first metal rod 121 located at a left end portion of the mounting seat 12 and a second metal rod 122 located at a right end portion of the mounting seat 12, the annular flange 123 at a lower end portion of the first metal rod 121 forms a third contact 81, the annular flange 123 at an upper end portion of the second metal rod 122 forms a fourth contact 82, a second connecting strip 312 is disposed on the top beam 31 of the guard rail 30, the second connecting strip 312 is a copper strip, the second connecting strip 312 is disposed on a lower end surface of the top beam 31 through an insulating, the second connecting bar 312 is arranged to be insulated from the top cross member 31, and when the guard rail 30 is lowered to the lower operation state, the second connecting bar 312 on the top cross member 31 of the guard rail 30 is brought into contact with the third contact 81 and the fourth contact 82, and the second contact assembly 80 is turned on.
Because the action of the hydraulic cylinder has a certain hysteresis, in order to prevent the guard rail 30 from crushing the second contact assembly 80 and to make the second contact assembly 80 better fit the second communication bar 312, the mounting base 12 is further provided with a spring for driving the metal rod to move upward, the spring includes a first spring 124 and a second spring 125, the first spring 124 is sleeved on the first metal rod 121, the lower end of the first spring 124 abuts against the top of the mounting base 12, the upper end of the first spring 124 abuts against the third contact 81, the second spring 125 is sleeved on the second metal rod 122, the lower end of the second spring 125 abuts against the top of the mounting base 12, and the upper end of the second spring 125 abuts against the fourth contact 82.
The guiding device 90 comprises a linear guide rail 91 and a linear slider 92 which are arranged on the guard rail 30, the linear guide rail 91 is arranged along the vertical direction, two end parts of the linear guide rail 91 are respectively fixed on the top cross beam 31 and the bottom cross beam 32 of the guard rail 30, the linear guide rail 91 plays a role in guiding and supporting the top cross beam 31 and the bottom cross beam 32, and the linear slider 92 is fixed on the side wall of the long side of the bearing platform 10.
In most of the oil pump motors, a control method is adopted in which a low-voltage circuit controls the operation of a high-voltage main circuit, the control circuit is a low-voltage circuit lower than a safe voltage, and there is no danger in connecting a contact assembly in series with the control circuit.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A loading dock, comprising:
the bearing platform is arranged in the pit in a lifting manner, and the projection of the bearing platform in the vertical direction is rectangular;
the lifting device is used for driving the bearing table to lift, and the lifting device is an electric lifting device;
the first control circuit is used for controlling the lifting device to act;
the protective guard is of a frame type structure and arranged on the long side of the bearing platform in a lifting mode, the protective guard has an upper working state and a lower working state, when the protective guard is in the upper working state, the upper portion of the protective guard protrudes out of the upper surface of the bearing platform to protect the long side of the bearing platform, and when the protective guard is in the lower working state, the upper end surface of the protective guard is flush with the upper surface of the bearing platform;
the first driving mechanism is used for driving the protective guard to lift;
the lap joint plate is rotatably arranged on the short side of the bearing platform and has an unfolding working state and a folding working state, when the lap joint plate is in the unfolding working state, the upper surface of the lap joint plate is flush with the upper surface of the bearing platform, and when the lap joint plate is in the folding working state, the plane where the lap joint plate is located is vertical to the upper surface of the bearing platform;
the second driving mechanism is used for driving the lap joint plate to rotate so as to enable the lap joint plate to be changed into the unfolding working state or the folding working state;
the second control circuit is used for controlling the second driving mechanism to act;
the method is characterized in that:
the bottom of the short side of the bearing table is provided with a first contact assembly which is connected in series with the first control circuit, and when the lapping plate rotates to a folding working state, the lapping plate is communicated with the first contact assembly to enable the first control circuit to be communicated;
and when the protective guard descends to a lower working state, the protective guard is communicated with the second contact assembly, so that the second control circuit is communicated.
2. The loading dock of claim 1, wherein: the short side of plummer is equipped with downwardly extending's mounting panel, the mounting panel is the insulation board, first contact subassembly is including setting up the first contact and the second contact of mounting panel upper end the overlap joint board rotates when drawing in operating condition, the upper end and the first contact of overlap joint board, the lower tip and the second contact of overlap joint board make first contact subassembly switch-on.
3. The loading dock of claim 2, wherein: the lap joint plate is provided with a first communication strip, the first communication strip is a copper strip, the first communication strip and the lap joint plate are arranged in an insulating mode, and when the lap joint plate rotates to a furling working state, the first communication strip is located on the inner side of the lap joint plate and communicated with the first contact and the second contact.
4. The loading dock of claim 1, wherein: the long avris of plummer is equipped with outside convex mount pad, the mount pad with the plummer sets up with insulating mutually, the second contact subassembly is including setting up the third contact of mount pad left end portion is in with the setting the fourth contact of mount pad right-hand member the rail guard descends to down during operating condition, the top beam of rail guard with the third contact with the fourth contact contacts, makes the second contact subassembly switch-on.
5. The loading dock of claim 4, wherein: the lower terminal surface of top crossbeam is provided with the second and connects the strip, the second connects the strip for the copper bar, the second connect the strip with the top crossbeam sets up with insulating mutually.
6. The loading dock of claim 4, wherein: the mounting seat is made of insulating materials, a metal rod capable of sliding up and down is arranged on the mounting seat, annular flanges are arranged at two ends of the metal rod, the metal rod comprises a first metal rod located at the left end of the mounting seat and a second metal rod located at the right end of the mounting seat, the annular flange at the lower end of the first metal rod forms the third contact, and the annular flange at the upper end of the second metal rod forms the fourth contact.
7. The loading dock of claim 6, wherein: the mounting seat is further provided with a spring used for driving the metal rod to move upwards, the spring comprises a first spring and a second spring, the first spring is sleeved on the first metal rod, the lower end of the first spring is tightly abutted to the top of the mounting seat, the upper end of the first spring is tightly abutted to the third contact, the second spring is sleeved on the second metal rod, the lower end of the second spring is tightly abutted to the top of the mounting seat, and the upper end of the second spring is tightly abutted to the fourth contact.
8. The loading dock of claim 1, wherein: the first driving mechanism comprises a first hydraulic oil cylinder, a cylinder body of the first hydraulic oil cylinder is arranged on a connecting seat extending downwards from the long side of the bearing platform, the connecting seat is located at the middle position of the long side of the bearing platform, and a jacking rod of the first hydraulic oil cylinder is connected to the middle position of a cross beam at the top of the protective guard.
9. The loading dock of claim 1, wherein: the loading and unloading platform further comprises a guide device used for guiding the lifting of the protective guard, the guide device comprises a linear guide rail and a linear sliding block, the linear guide rail is arranged along the vertical direction, two end parts of the linear guide rail are respectively fixed on a top cross beam and a bottom cross beam of the protective guard, and the linear sliding block is fixed on the side wall of the long side of the bearing platform.
10. The loading dock of claim 1, wherein: the second driving mechanism comprises a second hydraulic cylinder, a cylinder body of the second hydraulic cylinder is rotatably connected to the bottom of the bearing table, and the end part of a jacking rod of the second hydraulic cylinder is rotatably connected to the lap plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011592571.0A CN112551422A (en) | 2020-12-29 | 2020-12-29 | Loading and unloading platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011592571.0A CN112551422A (en) | 2020-12-29 | 2020-12-29 | Loading and unloading platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112551422A true CN112551422A (en) | 2021-03-26 |
Family
ID=75032695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011592571.0A Pending CN112551422A (en) | 2020-12-29 | 2020-12-29 | Loading and unloading platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112551422A (en) |
-
2020
- 2020-12-29 CN CN202011592571.0A patent/CN112551422A/en active Pending
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