Shuttle vehicle hydraulic system
By designing the equivalent transfer of chamber flow in the shuttle vehicle hydraulic system, synchronous and uniform speed movement of the oil cylinders are achieved, the problem of insufficient cylinder synchronization in the existing technology is solved, and the stable transportation of goods and the normal operation of the warehouse system is ensured. .
Patent Information
- Application Number
- CN202421053024.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The existing shuttle vehicle hydraulic system has high requirements when the oil cylinder rises and falls simultaneously. If inconsistencies are not the same, the cargo may slide or slide, which poses a safety hazard.
A shuttle vehicle hydraulic system is designed to achieve synchronous lifting and descent of the oil cylinder through the equivalent transfer of the cavity flow, ensuring that the oil cylinder can be synchronized and at a stable speed.
The synchronous and uniform speed movement of the oil cylinder is achieved, ensuring the stable lifting, falling and transport of goods by the shuttle truck during automated work, avoiding the hidden dangers of cargo sliding and falling, and ensuring the normal operation of the entire warehouse system.
Smart Images
Figure CN222479091U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a shuttle vehicle, in particular to a hydraulic system of the shuttle vehicle. Background Art
[0002] The two motion mechanisms of the four-way vehicle's reversing and the pallet's lifting and lowering are both executed by cylinders, and the synchronization of multiple cylinders will be used as a key indicator.
[0003] The current specific workflow is as follows:
[0004] The reversing mechanism of the four-way vehicle is switched by the X-wheel assembly and the Y-wheel assembly, so that the four-way vehicle can move in four directions. The X-wheel assembly is driven up and down by the lifting of the oil cylinder, thereby changing the height of the four-way vehicle body.
[0005] When the X-wheel assembly rises, the vehicle body falls, that is, the Y-wheel on the vehicle body touches the track, and the X-wheel is off the track. At this time, the four-way vehicle moves along the Y direction. Conversely, when the X-wheel assembly falls, the vehicle body rises, and the Y-wheel on the vehicle body rises and is off the track, so that the X-wheel is attached to the track, that is, the shuttle moves along the X-axis direction.
[0006] In this work process, stricter requirements are placed on the synchronous rise and fall of the cylinders. If the heights of the cylinders are inconsistent, the goods may slide on the platform, resulting in failure of cargo positioning. In severe cases, it may cause hidden dangers such as the goods slipping. Utility Model Content
[0007] The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies in the prior art and provide a shuttle hydraulic system, the specific scheme of which is as follows:
[0008] A shuttle hydraulic system includes a filter, a double-acting oil pump, an on-off valve, a first one-way relief valve, a second one-way relief valve, a first pressure gauge, a second pressure gauge, a first one-way on-off valve, a second one-way on-off valve, a first reversing on-off valve, a second reversing on-off valve, a third reversing on-off valve, a fourth reversing on-off valve, a third one-way relief valve, a fourth one-way relief valve, a lifting cylinder group, and a reversing cylinder group;
[0009] The filter is connected to the oil tank, the filter is connected to the double-acting oil pump, the double-acting oil pump is connected to the on-off valve, the first one-way relief valve, the second one-way relief valve, the first one-way on-off valve, and the second one-way on-off valve; the first one-way on-off valve and the second one-way on-off valve are connected to the first reversing on-off valve, the second reversing on-off valve, the third reversing on-off valve, and the fourth reversing on-off valve, and the first reversing on-off valve, the second reversing on-off valve, the third reversing on-off valve, and the fourth reversing on-off valve are connected to the lifting cylinder group and the reversing cylinder group;
[0010] The upper chambers of the oil cylinders of the lifting oil cylinder group and the reversing oil cylinder group are connected to the P ports of the third one-way relief valve and the fourth one-way relief valve;
[0011] The T ports of the third one-way relief valve and the fourth one-way relief valve are communicated with the lower chambers of the oil lifting cylinder group and the reversing cylinder group.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] Through the equivalent transfer of cavity flow, synchronous lifting of the cylinder can be achieved, ensuring that the cylinder can move synchronously and at a stable speed when the shuttle car's X-wheel assembly rises and falls and the pallet rises and falls, ensuring the stable lifting, lowering, transfer and transportation of the carried goods during long-term automated work of the shuttle car, and also ensuring the normal operation of the entire warehouse system. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a schematic diagram of the assembly structure of the lifting cylinder group and the reversing cylinder group on the shuttle vehicle of the utility model;
[0016] Figure 3 It is a schematic diagram of the assembly structure of the lifting cylinder group and the pallet assembly;
[0017] Figure 4 It is a schematic diagram of the assembly structure of the reversing cylinder group and the X-wheel assembly;
[0018] Figure 5 This is a schematic diagram of the X-wheel assembly in the rising state;
[0019] Figure 6 This is a schematic diagram of the X-wheel assembly in the descending state;
[0020] Explanation of the accompanying drawings: including a filter 1, a double-acting oil pump 2, an on-off valve 3, a first one-way relief valve 4, a first pressure gauge 5, a first one-way on-off valve 6, a first reversing on-off valve 7, a second reversing on-off valve 8, a third one-way relief valve 9, a lifting cylinder group 10, a reversing cylinder group 11, a fourth one-way relief valve 12, a third reversing on-off valve 13, a fourth reversing on-off valve 14, a second one-way on-off valve 15, a second pressure gauge 16, a second one-way relief valve 17, an X-wheel assembly 18, a Y-wheel assembly 19, and a pallet assembly 20. DETAILED DESCRIPTION
[0021] like Figures 1 to 6As shown, this example provides a shuttle hydraulic system including a filter 1, a double-acting oil pump 2, an on-off valve 3, a first one-way relief valve 4, a second one-way relief valve 17, a first pressure gauge 5, a second pressure gauge 16, a first one-way on-off valve 6, a second one-way on-off valve 15, a first reversing on-off valve 7, a second reversing on-off valve 8, a third reversing on-off valve 13, a fourth reversing on-off valve 14, a third one-way relief valve 9, a fourth one-way relief valve 12, a lifting cylinder group 10, and a reversing cylinder group 11;
[0022] The filter 1 is connected to the oil tank, the filter 1 is connected to the double-acting oil pump, the double-acting oil pump is connected to the on-off valve 3, the first one-way relief valve 4, the second one-way relief valve 17, the first one-way on-off valve 6, and the second one-way on-off valve 15; the first one-way on-off valve 6 and the second one-way on-off valve 15 are connected to the first reversing on-off valve 7, the second reversing on-off valve 8, the third reversing on-off valve 13, and the fourth reversing on-off valve 14, and the first reversing on-off valve 7, the second reversing on-off valve 8, the third reversing on-off valve 13, and the fourth reversing on-off valve 14 are connected to the lifting cylinder group 10 and the reversing cylinder group 11;
[0023] The oil lifting cylinder group 10 and the reversing cylinder group 11 each have four oil cylinders, and use double-piston oil cylinders with upper and lower chambers;
[0024] The upper chambers of the oil cylinders of the lifting oil cylinder group 10 and the reversing oil cylinder group 11 are connected to the P ports of the third one-way relief valve 9 and the fourth one-way relief valve 12;
[0025] The T ports of the third one-way relief valve 9 and the fourth one-way relief valve 12 are communicated with the lower chambers of the oil lifting cylinder group 10 and the reversing cylinder group 11 .
[0026] The synchronous lifting and lowering action flow of the X-wheel assembly 15: the double-acting oil pump 2 rotates forward to pump pressure, and the hydraulic oil passes through the filter 1 to filter impurities. At this time, the on-off valve 3 is energized and blocked, and the oil circuit flows to the first pressure gauge 5 with signal output and the first one-way relief valve 4, as well as to the first one-way on-off valve 6. The first one-way on-off valve 6 is not energized and the P port is blocked from the T port. At this time, the oil circuit pressure gradually increases and exceeds the threshold of the first one-way relief valve 4, that is, the valve automatically opens to release pressure and return oil, ensuring that the oil circuit pressure is within a safe range;
[0027] Open the first one-way on-off valve 6, the flow from the P port to the T port, the first reversing on-off valve 7 and the second reversing on-off valve 8 are energized, the four oil cylinders of the lifting cylinder group 10 are pressed upward, the lower chamber of the first oil cylinder enters oil, pushing the upper chamber, the upper chamber enters oil into the lower chamber of the second oil cylinder, the upper chamber of the second oil cylinder pushes the lower chamber of the third oil cylinder, and so on, the upper chamber of the last oil cylinder passes through the second one-way on-off valve 15 without electricity, and the T port flows to the P port in a one-way manner to discharge oil
[0028] The whole process is achieved through equivalent transfer of cavity flow, that is, synchronous lifting of four cylinders;
[0029] On the contrary, the double-acting oil pump 2 reverses the pumping pressure, the first one-way on-off valve 6 loses power and the flow from P port to T port is blocked, the second one-way on-off valve 15 is energized and the flow from P port to T port is blocked, the first reversing on-off valve 7 and the second reversing on-off valve 8 maintain the power path, oil enters the upper chamber of the cylinder, and oil flows out of the lower chamber to push the upper chamber of the next cylinder, and the same goes for the four cylinders. The lower chamber of the last cylinder discharges oil through the first one-way on-off valve 6 in a de-energized state, and the oil flows from T port to P port in a one-way direction. At this time, the four cylinders complete the synchronous descending action.
[0030] The synchronous lifting and lowering action flow of the support plate assembly 20 is as follows: the double-acting oil pump 2 rotates forward to pump pressure, and the hydraulic oil passes through the filter 1 to filter impurities. At this time, the on-off valve 3 is energized and blocked, and the oil circuit flows in the direction of the first pressure gauge 5 with signal output and the first one-way relief valve 4, as well as the first one-way on-off valve 6. The first one-way on-off valve 6 is not energized and the P port is blocked from the T port. At this time, the oil circuit pressure gradually increases and exceeds the threshold of the first one-way relief valve 4, that is, the valve automatically opens to release pressure and return oil, ensuring that the oil circuit pressure is within a safe range;
[0031] Open the first one-way on-off valve 6, the oil flows from the P port to the T port, the third reversing on-off valve 13 and the fourth reversing on-off valve 14 are energized, and at this time, the four oil cylinders of the reversing oil cylinder group 11 are pressed upward, the lower chamber of the first oil cylinder flows into oil, pushing the upper chamber, the upper chamber flows into oil to the lower chamber of the second oil cylinder, the upper chamber of the second oil cylinder pushes the lower chamber of the third oil cylinder, and so on, the upper chamber of the last oil cylinder passes through the second one-way on-off valve 15 without electricity, and the oil flows from the T port to the P port in a one-way manner;
[0032] The whole process is achieved through equivalent transfer of cavity flow, that is, synchronous lifting of four cylinders;
[0033] On the contrary, the oil pump reverses the pumping pressure, the first one-way on-off valve 6 loses power and the flow from P port to T port is blocked, the second one-way on-off valve 15 is energized and the flow from P port to T port is blocked, the third reversing on-off valve 13 and the fourth reversing on-off valve 14 maintain the energized path, the first oil cylinder of the reversing cylinder group 11 enters the upper chamber of the oil cylinder, and the oil is discharged from the lower chamber to push the upper chamber of the next oil cylinder, and the same goes for the four oil cylinders. The lower chamber of the last oil cylinder discharges oil from the T port to the P port in a one-way manner through the first one-way on-off valve 6 when it is de-energized. At this time, the four oil cylinders complete the synchronous descending action.
[0034] It should be noted that during the synchronous lifting or lowering of the cylinders, if one of the cylinders is abnormally stuck, the oil circuit pressure will increase. When it reaches the overflow valve threshold, the overflow valve connected to the cylinder will open to balance the pressure between the two chambers and avoid abnormalities such as damage to the cylinder sealing ring due to excessive pressure difference.
[0035] When the oil cylinder is lifted or lowered to the right position, the on-off of the on-off valve 3 can avoid frequent starting and stopping of the oil pump, thereby increasing the service life of the oil pump and the motor.
[0036] It should also be noted that the shuttle's carrying capacity is an extremely important indicator. When the shuttle is transporting goods, it is unable to evaluate the goods and cannot detect the weight of the goods. Therefore, out of consideration for the shuttle's own safe load and the parameter recording of each product on the shelf, the utility model adds a pressure conversion weight function.
[0037] The pressure applied by the double-acting oil pump 2 during the lifting of the pallet is converted into load weight through pressure conversion by the analog data output by the first pressure gauge 5 with signal output. Conversely, the second pressure gauge 16 with signal output can also detect the oil circuit pressure data in real time when the oil cylinder descends. The above pressure data can be used for analysis and abnormality troubleshooting of the shuttle oil circuit system.
[0038] Finally, the first pressure gauge 5 and the second pressure gauge 16 with signal output are connected to the PLC to conduct real-time supervision during the automated operation. If an abnormality occurs, measures such as automatic stop and alarm can be taken to ensure the safe operation of the shuttle. Alternatively, the status of the shuttle hydraulic system can be analyzed in the oil pressure change record data to eliminate potential risks.
[0039] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.
Claims
1. A shuttle hydraulic system, characterized in that: It comprises a filter (1), a double-acting oil pump (2), an on-off valve (3), a first one-way relief valve (4), a second one-way relief valve (17), a first pressure gauge (5), a second pressure gauge (16), a first one-way on-off valve (6), a second one-way on-off valve (15), a first reversing on-off valve (7), a second reversing on-off valve (8), a third reversing on-off valve (13), a fourth reversing on-off valve (14), a third one-way relief valve (9), a fourth one-way relief valve (12), a lifting cylinder group (10), and a reversing cylinder group (11); The filter (1) is connected to the oil tank, the filter (1) is connected to the double-acting oil pump, the double-acting oil pump is connected to the on-off valve (3), the first one-way relief valve (4), the second one-way relief valve (17), the first one-way on-off valve (6), and the second one-way on-off valve (15); the first one-way on-off valve (6) and the second one-way on-off valve (15) are connected to the first reversing on-off valve (7), the second reversing on-off valve (8), the third reversing on-off valve (13), and the fourth reversing on-off valve (14); the first reversing on-off valve (7), the second reversing on-off valve (8), the third reversing on-off valve (13), and the fourth reversing on-off valve (14) are connected to the lifting cylinder group (10) and the reversing cylinder group (11); The upper chambers of the oil cylinders of the lifting oil cylinder group (10) and the reversing oil cylinder group (11) are connected to the P ports of the third one-way relief valve (9) and the fourth one-way relief valve (12); The T ports of the third one-way relief valve (9) and the fourth one-way relief valve (12) are in communication with the lower chambers of the oil lifting cylinder group (10) and the reversing cylinder group (11).