Hydraulic power device of four-way shuttle vehicle for AGV (Automatic Guided Vehicle)

Abstract

The utility model provides a four-way shuttle vehicle hydraulic power device for an AGV, which comprises a first hydraulic cylinder group, a second hydraulic cylinder group, a control valve group, a cylinder group, a valve plate group and a hydraulic pump, each of the first hydraulic cylinder group and the second hydraulic cylinder group comprises four hydraulic cylinders, and the cylinder group comprises four cylinders. The first hydraulic cylinder group and the second hydraulic cylinder group are respectively arranged on one cylinder body; the four cylinder bodies are connected into a whole through the valve plate set, runner holes of the cylinder bodies and the valve plate set serve as oil ways for communicating the hydraulic pump with the first hydraulic cylinder set and the second hydraulic cylinder set, and the control valve set is arranged in the oil ways. The eight hydraulic cylinders are connected with the hydraulic pump and all execution elements without any oil pipe, and the oil leakage risk can be reduced; modular design is achieved, when a certain hydraulic cylinder is abnormal in action, corresponding elements can be replaced according to an abnormal reason table, a professional hydraulic engineer does not need to solve the problem on site, and the problem that after-sales of a client is not in time is solved; meanwhile, the method is suitable for batch production.

Description

Technical Field

[0001] The utility model relates to the technical field of four-way shuttle vehicles for stereoscopic warehouses, in particular to a hydraulic power device for a four-way shuttle vehicle for AGVs. Background Art

[0002] The four-way shuttle is a highly automated logistics equipment with two sets of wheel systems. It can move in the x-axis and y-axis directions and has the characteristic of being able to travel in four directions without turning. The four-way shuttle plays an important role in the automated warehouse. It can shuttle between shelves at will and deliver goods to the designated location according to instructions.

[0003] The hydraulic system of the four-way shuttle vehicle includes a lifting hydraulic cylinder unit and a reversing hydraulic cylinder unit, each of which includes four hydraulic cylinders arranged in a rectangular shape. The lifting hydraulic cylinder unit is used to drive the pallet to rise and fall, and the reversing hydraulic cylinder unit is used to drive the reversing device to rise and fall to realize the vertical switching of the driving direction of the four-way shuttle vehicle.

[0004] There are two types of traditional four-way shuttle vehicles in high-rise warehouses: electric trapezoidal screw lifting and hydraulic lifting. The electric type generally has a lifting force of less than 1 ton and a service life of less than 10,000 times. The general hydraulic lifting type can lift up to 3 tons, but the hydraulic system cylinders on the market need to be connected with oil pipes and joints. Due to the continuous impact of high and low pressures during the operation of the hydraulic system, the joints and oil pipes will loosen and cause oil leakage. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a hydraulic power device for a four-way shuttle vehicle for an AGV.

[0006] The utility model is realized by the following technical solutions:

[0007] A hydraulic power device for a four-way shuttle for an AGV comprises a first hydraulic cylinder group, a second hydraulic cylinder group, a control valve group, a cylinder group, a valve plate group and a hydraulic pump, wherein the first hydraulic cylinder group comprises four first hydraulic cylinders, and the second hydraulic cylinder group comprises four second hydraulic cylinders; the cylinder group comprises four cylinder bodies, and the four first hydraulic cylinders and the four second hydraulic cylinders are respectively mounted on one of the cylinder bodies; the valve plate group connects the four cylinder bodies together to form an integral structure, and the cylinder body and the valve plate group are both provided with flow channel holes, and the flow channel holes of the cylinder body and the valve plate group serve as oil circuits connecting the hydraulic pump with the first hydraulic cylinder group and the second hydraulic cylinder group, and the control valve group is arranged in the oil circuit connecting the hydraulic pump with the first hydraulic cylinder group and the second hydraulic cylinder group.

[0008] Optionally, the valve plate group includes a first valve plate, a second valve plate, and a third valve plate, wherein two ends of the first valve plate are respectively fixedly connected to the first cylinder body and the second cylinder body; two ends of the second valve plate are respectively fixedly connected to the second cylinder body and the third cylinder body; two ends of the third valve plate are respectively fixedly connected to the third cylinder body and the fourth cylinder body.

[0009] Optionally, a hydraulic power unit for a four-way shuttle for AGV also includes a synchronous controller, the hydraulic pump is connected to the synchronous controller through a main oil circuit, and then connected to the first hydraulic cylinder group and the second hydraulic cylinder group through the synchronous controller, the valve plate group, the cylinder group, and the control valve group to supply oil to each hydraulic cylinder.

[0010] Optionally, the valve plate group also includes a fourth valve plate, and the synchronous controller is installed on the first valve plate, the oil inlet of the synchronous controller is connected to the flow channel hole in the fourth valve plate, and the oil outlet of the synchronous controller is connected to the flow channel hole in the first valve plate; the synchronous controller distributes the pressure of the main oil circuit to the oil outlet, and then from the oil outlet to the first valve plate, and from the first valve plate to the first cylinder body, the second cylinder body and the second valve plate, and then from the second valve plate to the third cylinder body, the third valve plate, and then from the third valve plate to the fourth cylinder body.

[0011] Optionally, a hydraulic power device for a four-way shuttle for an AGV further includes a first joint and a second joint, one end of the first joint is connected to the oil inlet of the synchronous controller, and the other end of the first joint is mounted on the first joint mounting seat;

[0012] The fourth valve plate is placed between the first joint mounting seat and the first valve plate, and the first joint mounting seat, the fourth valve plate and the first valve plate are fixed by screws, and the interior of the first joint is connected with the flow channel hole in the fourth valve plate through the flow channel hole in the first joint mounting seat;

[0013] One end of the second joint is connected to the oil outlet of the synchronous controller, and the other end of the second joint is installed on the second joint mounting seat. The second joint mounting seat is fixed to the first valve plate by screws, and the interior of the second joint is connected to the flow channel hole in the first valve plate through the flow channel hole in the second joint mounting seat.

[0014] Optionally, the valve plate assembly further includes a fifth valve plate for oil circuit conversion transition.

[0015] Optionally, a power unit is installed on the second valve plate, the power unit includes the hydraulic pump and the motor, and a controller is installed on the third valve plate, and the power unit and the control valve group are both connected to the controller.

[0016] Optionally, the control valve group includes a first two-position four-way reversing valve, a second two-position four-way reversing valve and a two-position three-way reversing valve installed on each cylinder body, and the first two-position four-way reversing valve, the second two-position four-way reversing valve and the two-position three-way reversing valve respectively control the extension and retraction of the first hydraulic cylinder and the second hydraulic cylinder on the same cylinder body.

[0017] Optionally, each cylinder body has a first hydraulic cylinder mounting hole and a second hydraulic cylinder mounting hole, and the cylinder body has flow channel holes respectively connecting the first hydraulic cylinder mounting hole and the second hydraulic cylinder mounting hole; the first hydraulic cylinder mounting hole and the second hydraulic cylinder mounting hole are both blind holes, the first hydraulic cylinder mounting hole opening faces downward, and the second hydraulic cylinder mounting hole opening faces upward, the first hydraulic cylinder is installed in the first hydraulic cylinder mounting hole, and the second hydraulic cylinder mounting hole is installed in the second hydraulic cylinder mounting hole.

[0018] Compared with the prior art, this application has at least the following beneficial effects:

[0019] 1. This application uses the flow channel holes on the cylinder group and the valve plate group as the oil circuit connecting the hydraulic pump with the first hydraulic cylinder group and the second hydraulic cylinder group. The 8 hydraulic cylinders are not connected to the hydraulic unit and each actuator without any oil pipe. The connection between the valve plate group and the cylinder group is almost not loose under the continuous impact of high and low pressure in the hydraulic system, which can reduce the risk of oil leakage and help improve user satisfaction.

[0020] 2. Each cylinder body of the present application integrates a lifting hydraulic cylinder, a reversing hydraulic cylinder and a matching control valve, realizing a modular design of the system. When a hydraulic cylinder malfunctions, the corresponding component can be replaced according to the cause of the abnormality. There is no need for professional hydraulic engineers to solve the problem on site, which solves the problem of untimely after-sales service for customers. At the same time, the modular design is also suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a three-dimensional diagram of the hydraulic power device of the four-way shuttle for AGV when the eight hydraulic cylinders in the embodiment are extended;

[0023] Figure 2 It is a top view of the hydraulic power device of the four-way shuttle for AGV in the embodiment;

[0024] Figure 3It is a front view of the hydraulic power device of the four-way shuttle vehicle for AGV when the eight hydraulic cylinders in the embodiment are not extended;

[0025] Figure 4 for Figure 2 Sectional view at the middle BB;

[0026] Figure 5 for Figure 2 Cross-sectional view at FF;

[0027] Figure 6 for Figure 2 Sectional view at GG in the middle;

[0028] Figure 7 for Figure 2 Sectional view at HH in the middle;

[0029] Figure 8 A schematic diagram of the cylinder group and three valve plates being connected as a whole in the embodiment;

[0030] Fig. 9 is a three-dimensional diagram of a cylinder body in the embodiment;

[0031] Fig.10 is a cross-sectional view of a cylinder body in an embodiment;

[0032] Fig.11 for Figure 3 A partial enlarged view of the middle A;

[0033] Fig.12 for Fig.11 Sectional view at CC;

[0034] Fig.13 is a structural schematic diagram of the first valve plate in the embodiment;

[0035] Fig.14 is a schematic structural diagram of the second valve plate in the embodiment;

[0036] Fig.15 is a schematic structural diagram of the third valve plate in the embodiment;

[0037] Fig.16 is a schematic structural diagram of the fourth valve plate in the embodiment;

[0038] Fig.17 is a schematic structural diagram of the fifth valve plate in the embodiment;

[0039] Fig.18 is a schematic diagram of a first plug in an embodiment;

[0040] Fig.19 Schematic diagram of user-side wiring of the first plug in the embodiment. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

[0043] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Please refer to Figures 1 to 4 The present embodiment discloses a hydraulic power device for a four-way shuttle vehicle for an AGV, comprising a cylinder group, a valve plate group, a first hydraulic cylinder group, a second hydraulic cylinder group, a control valve group and a power unit 7.

[0046] The first hydraulic cylinder group includes four first hydraulic cylinders 21, and the second hydraulic cylinder group includes four second hydraulic cylinders 31. The four first hydraulic cylinders 21 and the four second hydraulic cylinders 31 are arranged in a rectangular shape. The oil circuits of the first hydraulic cylinder group and the second hydraulic cylinder group are connected in parallel, and the first hydraulic cylinder group and the second hydraulic cylinder group can be driven to move independently; the four first hydraulic cylinders 21 of the first hydraulic cylinder group are connected in parallel or in series, and the four second hydraulic cylinders 31 of the second hydraulic cylinder 31 are connected in parallel or in series.

[0047] The power unit 7 includes a hydraulic pump, a brushless motor, a relief valve, etc. The control valve group is arranged in the oil circuit connecting the hydraulic pump with the first hydraulic cylinder group and the second hydraulic cylinder group.

[0048] Please refer to Figures 1 to 3 The cylinder group includes four cylinders 11, which are arranged in a rectangular shape and connected together through a valve plate group. Four first hydraulic cylinders 21 and four second hydraulic cylinders 31 are respectively installed on one of the cylinders 11, and one first hydraulic cylinder 21 and one second hydraulic cylinder 31 are installed on each cylinder 11. There are flow holes on the cylinder 11 and the valve plate, and the flow holes on the cylinder 11 and the valve plate serve as oil paths connecting the hydraulic pump with the first hydraulic cylinder group and the second hydraulic cylinder group.

[0049] Please refer to Figure 8 In some embodiments, the four cylinder bodies 11 are connected together through the first valve plate 121, the second valve plate 122 and the third valve plate 123. Specifically, the first cylinder body 11 is connected to the second cylinder body 11 through the first valve plate 121, the second cylinder body 11 is connected to the third cylinder body 11 through the second valve plate 122, and the third cylinder body 11 is connected to the fourth cylinder body 11 through the third valve plate 123. The flow channel holes in the first valve plate 121 are respectively connected to the corresponding flow channel holes of the first cylinder body 11, the second cylinder body 11 and the second valve plate 122; the flow channel holes in the second valve plate 122 are respectively connected to the corresponding flow channel holes of the third cylinder body 11 and the third valve plate 123, and the flow channel holes of the third valve plate 123 are connected to the corresponding flow channel holes of the third cylinder body 11.

[0050] Each cylinder body 11 is also equipped with a first two-position four-way reversing valve 41, a second two-position four-way reversing valve 43 and a two-position three-way reversing valve 42, which respectively control the extension and retraction of the first hydraulic cylinder 21 and the second hydraulic cylinder 31.

[0051] Please refer to Fig. 9 , Fig.10 Each cylinder body 11 has a first hydraulic cylinder mounting hole 111, a second hydraulic cylinder mounting hole 112 and a matching flow channel hole 117;

[0052] The first hydraulic cylinder mounting hole 111 and the second hydraulic cylinder mounting hole 112 are both blind holes, the first hydraulic cylinder mounting hole 111 opens downward, and the second hydraulic cylinder mounting hole 112 opens upward. The first hydraulic cylinder 21 is mounted in the first hydraulic cylinder mounting hole 111, and the second hydraulic cylinder mounting hole 112 is mounted in the second hydraulic cylinder mounting hole 112.

[0053] Please refer to Fig.10 In some embodiments, the cylinder body 11 is manufactured in one piece, and the cylinder body 11 includes a horizontal plate 113, a first cylinder body 114 and a second cylinder body 115. The top of the first cylinder body 114 is connected to the bottom surface of the horizontal plate 113, one side of the second cylinder body 115 is connected to one end of the horizontal plate 113, the top surface of the second cylinder body 115 is flush with the top surface of the horizontal plate 113, the first hydraulic cylinder mounting hole 111 is opened on the first cylinder body 114, and the second hydraulic cylinder mounting hole 112 is opened on the second cylinder body 115.

[0054] In some embodiments, a protrusion 118 is provided on the side of the second cylinder body 115 away from the horizontal plate 113, the top surface of the protrusion 118 is lower than the top surface of the second cylinder body 115, the bottom surface of the protrusion 118 is flush with the bottom surface of the second cylinder body 115, and a valve mounting hole 116 is provided on the top surface of the protrusion 118, and a first two-position four-way reversing valve 41, a second two-position four-way reversing valve 43 and a two-position three-way reversing valve 42 are respectively installed in the valve mounting hole 116.

[0055] Please refer to Figure 3 , Fig.10 In some embodiments, a notch 119 is provided at the bottom of the cylinder body 11, and both ends of the first valve plate 121, the second valve plate 122, and the third valve plate 123 are installed at the notch 119 of the corresponding cylinder body 11, and are fixedly connected to the corresponding cylinder body 11 through a pin 13, so that the cylinder body group, the first hydraulic cylinder group, and the second hydraulic cylinder group form an integral structure.

[0056] Please refer to Fig.11 , the first hydraulic cylinder 21 and the second hydraulic cylinder 31 both include a cylinder barrel 101, a piston rod 102, a piston 103 and a cylinder cover 104, the cylinder barrel 101 and the cylinder cover 104 are installed in the mounting hole of the cylinder body 11, and the cylinder cover 104 is installed on the outside of the cylinder barrel 101; the piston 103 is installed in the cylinder barrel 101 and the cylinder barrel 101 is sealed, a wear-resistant ring and a piston seal are provided between the piston 103 and the cylinder barrel 101, a buffer block 106 is provided at the inner end of the piston 103, and a hydraulically controlled one-way valve 107 is installed at the central opening of the buffer block 106; one end of the piston rod 102 is connected to the piston 103, and the other end can be extended to the outside of the cylinder body 11, a tie rod seal and a dust ring are provided between the outer cylindrical surface of the piston rod 102 and the cylinder cover 104, and the dust ring is located on the outside of the tie rod seal; there are O-type sealing rings 105 between the hole wall of the cylinder barrel 101 and the cylinder body 11, and between the cylinder cover 104 and the hole wall of the cylinder body 11.

[0057] Optionally, the cylinder barrel 101 is a precision seamless steel pipe.

[0058] Please refer to Figure 7 The first two-position four-way reversing valve 41 , the second two-position four-way reversing valve 43 and the two-position three-way reversing valve 42 are respectively connected to one of the flow passage holes 117 of the first valve plate 121 through the flow passage holes 117 on the cylinder body 11 .

[0059] Please refer to Figure 4 , Figures 10 to 12 A first valve hole 22 and a second valve hole 32 are provided on the cylinder body 11 . The first valve hole 22 is connected to the first hydraulic cylinder mounting hole 111 through the flow channel hole 117 , and the second valve hole 32 is connected to the second hydraulic cylinder mounting hole 112 through the flow channel hole 117 .

[0060] A valve assembly is installed in the first valve hole 22 and the second valve hole 32. The valve assembly includes a piston 201, two valve core assemblies 202 and two plugs 203. The two valve core assemblies 203 are symmetrically installed at both ends of the piston 201. The plug 203 is installed at the outer end of the valve core assembly 202 and fixedly connected to the cylinder body 11.

[0061] Please refer to Figure 1 , Figure 2 In some embodiments, a synchronous controller 5 is installed on the first valve plate 121. The synchronous controller 5 is used to distribute the flow of the main oil circuit to each hydraulic cylinder, and can automatically control the oil output to achieve control of each hydraulic cylinder.

[0062] The hydraulic pump is connected to the synchronous controller 5 through the main oil circuit, and then connected to the first hydraulic cylinder group and the second hydraulic cylinder group through the synchronous controller 5, the cylinder group, the valve plate group, and the control valve group to supply oil to each hydraulic cylinder.

[0063] In some embodiments, the valve plate assembly further includes a fourth valve plate 124, the oil inlet 51 of the synchronous controller 5 is connected to the flow channel hole 117 in the fourth valve plate 124, and the oil outlet 52 of the synchronous controller 5 is connected to the flow channel hole 117 in the first valve plate 121. The synchronous controller 5 distributes the pressure of the main oil circuit to the oil outlet 52, and then distributes it to the first valve plate 121 from the oil outlet 52, and then distributes it to the first cylinder body 11, the second cylinder body 11 and the second valve plate 122 from the first valve plate 121, and then from the second valve plate 122 to the third cylinder body 11, the third valve plate 123, and then from the third valve plate 123 to the fourth cylinder body 11.

[0064] Please refer to Figure 2 , Figure 5In some embodiments, one end of the first connector 81 is connected to the oil inlet 51 of the synchronous controller 5, and the other end of the first connector 81 is mounted on the first connector mounting base 810, and the fourth valve plate 124 is placed between the first connector mounting base 810 and the first valve plate 121, and the first connector mounting base 810, the fourth valve plate 124, and the first valve plate 121 are fixed together with screws; the interior of the first connector 81 is connected to the flow channel hole 117 in the fourth valve plate 124 through the flow channel hole 117 in the first connector mounting base 810.

[0065] Please refer to Figure 2 , Figure 6 In some embodiments, the oil outlet 52 of the synchronous controller 5 is connected to one end of the second connector 82, the other end of the second connector 82 is mounted on the second connector mounting seat 820, the second connector mounting seat 820 is fixedly connected to the first valve plate 121 by screws, and the second connector 82 is connected to one of the flow channel holes 117 in the first valve plate 121 through the flow channel hole 117 in the second connector mounting seat 820.

[0066] Of course, there is an O-ring 105 at the connection between the first joint 81 and the first joint mounting seat 810 and the synchronous controller 5; there is an O-ring 105 at the connection between the second joint 82 and the second joint mounting seat 820 and the synchronous controller 5; there is also an O-ring 105 at the connection between the flow channel holes 117 and the flow channel holes 117, and soft sealing is achieved through the sealing ring to effectively prevent leakage.

[0067] Please refer to Figure 2 In some embodiments, the valve plate assembly further includes a fifth valve plate 125 , and the function of the fifth valve plate 125 is oil circuit conversion transition.

[0068] Please refer to Figure 2 The power unit 7 is installed on the second valve plate 122 , and the controller 6 is installed on the third valve plate 123 . The power unit 7 and the control valve group are both connected to the controller 6 .

[0069] The controller 6 has a first plug 61 and a second plug 62. Fig.18 , Fig.19 The first plug 61 has a single row of five pins, four of which are used to input four operation commands of the user end respectively. The mechanism actions corresponding to different operation commands are shown in Table 1:

[0070] Table 1:

[0071] Customer Action Institutional Action SQ1 The first hydraulic cylinder group extends SQ2 The first hydraulic cylinder group retracts SQ3 The second hydraulic cylinder group extends SQ4 The second hydraulic cylinder group retracts

[0072] By configuring the controller 6, the user only needs to send signals for 4 actions to achieve the required actions, which simplifies the customer's controller design and difficulty. If a controller failure occurs, the controller can be directly replaced, reducing the intensity of after-sales analysis of the problem.

[0073] The utility model has four oil cylinders for lifting and four oil cylinders for switching without any oil pipe connection with the hydraulic unit and each actuator, which can reduce the risk of oil leakage and run 200,000 times without any oil leakage; the system adopts modular design, and if one of the oil cylinders has an abnormal action, the corresponding component can be replaced according to the cause table of the abnormality; there is no need for professional hydraulic engineers to solve the problem on site, which solves the after-sales problem of customers; the system is equipped with a controller, and the customer only needs to send signals for the four actions to achieve the required actions, which simplifies the design and difficulty of the controller for the customer; if the controller fails, the controller can be replaced, which simplifies the search for the cause of the control and reduces the intensity of after-sales problem analysis.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic power device for a four-way shuttle vehicle for an AGV, comprising a first hydraulic cylinder group, a second hydraulic cylinder group, a control valve group and a hydraulic pump, wherein the control valve group is arranged in an oil circuit connecting the hydraulic pump with the first hydraulic cylinder group and the second hydraulic cylinder group, wherein the first hydraulic cylinder group comprises four first hydraulic cylinders (21), and the second hydraulic cylinder group comprises four second hydraulic cylinders (31), wherein: Also includes: A cylinder group, comprising four cylinders (11), wherein the four first hydraulic cylinders (21) and the four second hydraulic cylinders (31) are respectively mounted on one of the cylinders (11); A valve plate assembly connects the four cylinder bodies (11) together to form an integral structure; The cylinder body (11) and the valve plate group are both provided with flow channel holes (117), and the flow channel holes of the cylinder body (11) and the valve plate group serve as oil paths connecting the hydraulic pump with the first hydraulic cylinder group and the second hydraulic cylinder group.

2. The hydraulic power device for a four-way shuttle vehicle for AGV according to claim 1, characterized in that: The valve plate assembly comprises: A first valve plate (121), two ends of which are respectively fixedly connected to the first cylinder body (11) and the second cylinder body (11); A second valve plate (122), two ends of which are respectively fixedly connected to the second cylinder body (11) and the third cylinder body (11); The third valve plate (123) has two ends fixedly connected to the third cylinder body (11) and the fourth cylinder body (11) respectively.

3. The hydraulic power device for a four-way shuttle vehicle for AGV according to claim 2, characterized in that: It also includes a synchronous controller (5), the hydraulic pump is connected to the synchronous controller (5) through a main oil circuit, and is then connected to the first hydraulic cylinder group and the second hydraulic cylinder group through the synchronous controller (5), a valve plate group, a cylinder group, and a control valve group, so as to supply oil to each hydraulic cylinder.

4. The hydraulic power device for a four-way shuttle vehicle for AGV according to claim 3, characterized in that: The valve plate assembly further comprises a fourth valve plate (124), the synchronous controller (5) is mounted on the first valve plate (121), an oil inlet (51) of the synchronous controller (5) is in communication with a flow channel hole (117) in the fourth valve plate (124), and an oil outlet (52) of the synchronous controller (5) is in communication with the flow channel hole (117) in the first valve plate (121); The synchronous controller (5) distributes the pressure of the main oil circuit to the oil outlet (52), and then distributes it from the oil outlet (52) to the first valve plate (121), and then distributes it from the first valve plate (121) to the first cylinder body (11), the second cylinder body (11) and the second valve plate (122), and then from the second valve plate (122) to the third cylinder body (11), the third valve plate (123), and then from the third valve plate (123) to the fourth cylinder body (11).

5. The hydraulic power device for a four-way shuttle vehicle for AGV according to claim 4, characterized in that: It also includes a first connector (81) and a second connector (82), one end of the first connector (81) is connected to the oil inlet (51) of the synchronous controller (5), and the other end of the first connector (81) is mounted on a first connector mounting seat (810); The fourth valve plate (124) is placed between the first joint mounting seat (810) and the first valve plate (121), and the first joint mounting seat (810), the fourth valve plate (124) and the first valve plate (121) are fixed by screws, and the interior of the first joint (81) is connected to the flow channel hole (117) in the fourth valve plate (124) through the flow channel hole (117) in the first joint mounting seat (810); One end of the second connector (82) is connected to the oil outlet (52) of the synchronous controller (5), and the other end of the second connector (82) is mounted on a second connector mounting base (820). The second connector mounting base (820) is fixed to the first valve plate (121) by screws, and the interior of the second connector (82) is connected to the flow channel hole (117) in the first valve plate (121) through the flow channel hole (117) in the second connector mounting base (820).

6. A hydraulic power device for a four-way shuttle vehicle for AGV according to any one of claims 2 to 5, characterized in that: The valve plate assembly further comprises a fifth valve plate (125) for oil circuit conversion transition.

7. A hydraulic power device for a four-way shuttle vehicle for AGV according to any one of claims 2 to 5, characterized in that: A power unit (7) is installed on the second valve plate (122), and the power unit (7) includes the hydraulic pump and the motor. A controller (6) is installed on the third valve plate (123), and the power unit (7) and the control valve group are both connected to the controller (6).

8. The hydraulic power device for a four-way shuttle vehicle for AGV according to claim 1, characterized in that: The control valve group comprises a first two-position four-way reversing valve (41), a second two-position four-way reversing valve (43) and a two-position three-way reversing valve (42) installed on each cylinder body (11). The first two-position four-way reversing valve (41), the second two-position four-way reversing valve (43) and the two-position three-way reversing valve (42) respectively control the extension and retraction of the first hydraulic cylinder (21) and the second hydraulic cylinder (31) on the same cylinder body (11).

9. A hydraulic power device for a four-way shuttle vehicle for AGV according to any one of claims 1-5 and 8, characterized in that: Each cylinder body (11) has a first hydraulic cylinder mounting hole (111) and a second hydraulic cylinder mounting hole (112), and the cylinder body (11) has a flow channel hole (117) in communication with the first hydraulic cylinder mounting hole (111) and the second hydraulic cylinder mounting hole (112). The first hydraulic cylinder mounting hole (111) and the second hydraulic cylinder mounting hole (112) are both blind holes. The first hydraulic cylinder mounting hole (111) opens downward, and the second hydraulic cylinder mounting hole (112) opens upward. The first hydraulic cylinder (21) is mounted in the first hydraulic cylinder mounting hole (111), and the second hydraulic cylinder mounting hole (112) is mounted in the second hydraulic cylinder mounting hole (112).

10. The hydraulic power device for a four-way shuttle vehicle for AGV according to claim 9, characterized in that: The integrally manufactured cylinder body (11) comprises: Horizontal plate (113); A first cylinder body (114), the top of which is connected to the bottom surface of the horizontal plate (113), and the first hydraulic cylinder mounting hole (111) is opened on the first cylinder body (114); A second cylinder body (115), one side of which is connected to one end of the horizontal plate (113); the top surface of the second cylinder body (115) is flush with the top surface of the horizontal plate (113); and the second hydraulic cylinder mounting hole (112) is provided on the second cylinder body (115); A protrusion (118) is provided on one side of the second cylinder body (115) away from the horizontal plate (113); the top surface of the protrusion (118) is lower than the top surface of the second cylinder body (115); a valve mounting hole (116) is provided on the top surface of the protrusion (118); a first two-position four-way reversing valve (41), a second two-position four-way reversing valve (43) and a two-position three-way reversing valve (42) are respectively mounted in the valve mounting holes (116).

Images