Wing opening hydraulic system

Abstract

The utility model discloses a wing opening hydraulic system which comprises an oil tank, a hydraulic oil pump, a motor and a lifting oil cylinder. A flange is welded on the inner wall of a top plate of the oil tank; a mounting through hole opposite to a flange inner hole is formed in the top plate; a fixing block used for sealing the mounting through hole is arranged on the outer wall of the top plate, and an internal oil way is formed in the fixing block. The hydraulic oil pump is arranged in the oil tank and is mounted on the fixed block; the motor is arranged outside the oil tank and installed on the fixing block, and the driving end of the motor penetrates through the fixing block and is connected with the hydraulic oil pump. An oil outlet of the hydraulic oil pump is communicated with a reversing valve through an internal oil way, and an oil outlet pipe is connected between the reversing valve and an inner cavity of the oil tank. An overflow valve is arranged between the inner cavity of the oil tank and the internal oil path; and a rodless cavity and a rod cavity of the lifting oil cylinder are respectively connected with the reversing valve. The hydraulic oil pump is arranged in the oil tank through the fixing block, the oil outlet of the hydraulic oil pump is connected with the reversing valve through the internal oil way on the fixing block, and the size of the wing opening hydraulic system is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic equipment technical field, specifically relates to a wing opening hydraulic system. BACKGROUND

[0002] The van is also called as the van, and is mainly used for transporting various objects in full sealing, and the special van can also transport chemical dangerous objects. At present, the wing opening van is gradually widely used, and the simple operation greatly improves the cargo loading and unloading efficiency. The hydraulic system is widely used in the van for driving the door of the van to open or close by changing the pressure to increase the force.

[0003] The existing wing opening hydraulic system is large in size, that is, occupies a large installation space, and the appearance of the van is poor. Specifically, the motor and the hydraulic pump are arranged outside the oil tank, thereby increasing the size of the wing opening hydraulic system. Among them, the Chinese patent document with the publication number CN205089702U discloses a hydraulic pump oil suction device. In the hydraulic pump oil suction device, the motor and the hydraulic pump are arranged outside the oil tank. SUMMARY

[0004] The utility model discloses a wing opening hydraulic system to solve the technical problem that the size of the existing wing opening hydraulic system is large.

[0005] The utility model discloses a wing opening hydraulic system is suitable for driving the door of the van to open or close, the wing opening hydraulic system includes oil tank, hydraulic oil pump, motor and lifting oil cylinder,

[0006] The oil tank is suitable for being installed on the van, the top plate inner wall of the oil tank is welded with the flange, the top plate is set up with the installation through -hole that the flange inner hole is opposite and is set up, the top plate outer wall is provided with the fixed block for sealing the installation through -hole, the fixed block is set up with the internal oil circuit,

[0007] The hydraulic oil pump is arranged in the oil tank and is installed on the fixed block, the motor is arranged outside the oil tank and is installed on the fixed block, the drive end of the motor passes through the fixed block and is connected with the hydraulic oil pump, the oil inlet of the internal oil circuit is connected with the oil outlet of the hydraulic oil pump, the oil outlet of the internal oil circuit is connected with the reversing valve, and the reversing valve is connected with the oil tank inner chamber and is connected with the oil outlet pipe, the oil tank inner chamber and the internal oil circuit are equipped with the overflow valve, and the overflow valve is installed on the fixed block,

[0008] The fixed end of the lifting oil cylinder is adapted to be mounted on the carriage, and the driving end is adapted to drive the door of the carriage to open or close; the rodless cavity and the rod cavity of the lifting oil cylinder are connected with the reversing valve respectively; the reversing valve is adapted to be switched by itself to connect the rodless cavity with the oil outlet of the internal oil circuit and the rod cavity with the oil outlet pipe, or to connect the rodless cavity with the oil outlet pipe and the rod cavity with the oil outlet of the internal oil circuit. The hydraulic oil pump is arranged in the oil tank through a fixing block, and the internal oil circuit on the fixing block connects the oil outlet of the hydraulic oil pump with the reversing valve, effectively reducing the volume of the wing opening hydraulic system.

[0009] Further, the wing opening hydraulic system further comprises a control valve group arranged on the outer wall of the top plate, and the control valve group comprises a reversing valve, a first one-way throttle valve, a hydraulic lock and a second one-way throttle valve.

[0010] The rodless cavity is connected with the reversing valve in sequence via the first one-way throttle valve and the hydraulic lock; and the rod cavity is connected with the reversing valve in sequence via the second one-way throttle valve and the hydraulic lock. The above scheme is adopted to enable the control valve group to control the lifting oil cylinder to perform the jacking action or the contraction action.

[0011] Further, the reversing valve is a three-position four-way reversing valve, and the reversing valve is sequentially provided with left position, middle position and right position oil channels;

[0012] The oil outlet of the internal oil circuit is adapted to be connected with the second one-way throttle valve through the hydraulic lock when the reversing valve is in the left position state;

[0013] The oil outlet of the internal oil circuit is adapted to be connected with the first one-way throttle valve through the hydraulic lock when the reversing valve is in the right position state;

[0014] The lifting oil cylinder is adapted to be in the static state of the rod cavity and the rodless cavity under the action of the hydraulic lock when the reversing valve is in the middle position state.

[0015] Further, the control valve group further comprises an oil circuit block;

[0016] The reversing valve is a superimposed reversing valve; the hydraulic lock is a superimposed hydraulic lock; the first one-way throttle valve and the second one-way throttle valve are superimposed throttle valves;

[0017] The superimposed reversing valve, the superimposed hydraulic lock, the superimposed throttle valve and the oil circuit block are sequentially superimposed from top to bottom, and the oil circuit block is fixed on the outer wall of the top plate;

[0018] The oil outlet of the internal oil circuit is connected with the reversing valve in sequence via a first oil inlet pipe and an internal oil channel of the oil circuit block;

[0019] The oil inlet of the oil outlet pipe is connected with the reversing valve through the internal oil channel of the oil path block.

[0020] Further, the four corners of the flange are fixed with nuts, and the top plate is provided with a connecting through hole corresponding to the inner hole of the nut;

[0021] The four corners of the fixing block are threadedly connected with the inner holes of the nuts through bolts, the shanks of the bolts pass through the fixing block and the connecting through hole in sequence and are connected with the nuts, and a first sealing ring is arranged between the fixing block and the top plate, and the first sealing ring is arranged opposite to the connecting through hole;

[0022] The lower end of the fixing block extends into the inner hole of the flange, and a second sealing ring is arranged between the lower end of the fixing block and the inner hole of the flange. The above scheme is adopted to prevent the oil tank from leaking.

[0023] Further, the motor is fixed on the top of the fixing block through a first bolt, and the shank of the first bolt passes through the motor and is threadedly connected with a first threaded hole on the fixing block;

[0024] The hydraulic oil pump is fixed on the bottom of the fixing block through a second bolt, and the shank of the second bolt passes through the hydraulic oil pump and is threadedly connected with a second threaded hole on the fixing block;

[0025] The first threaded hole and the second threaded hole are both blind holes. The above scheme is adopted to prevent the oil tank from leaking.

[0026] Further, a first one-way valve is arranged between the internal oil path and the reversing valve, and the first one-way valve is arranged on the fixing block.

[0027] Further, the wing opening hydraulic system further comprises a hand pump, the hand pump is fixed on the outer wall of the top plate, the oil inlet end of the hand pump extends into the inner cavity of the oil tank, the oil outlet end of the hand pump is arranged outside the oil tank, and a sealing ring is arranged between the hand pump and the oil tank.

[0028] The oil outlet of the internal oil path is connected with the reversing valve through a first oil inlet pipe;

[0029] The oil outlet end of the hand pump is connected with the first oil inlet pipe through a second oil inlet pipe. The above scheme improves the use flexibility of the wing opening hydraulic system.

[0030] Further, a first one-way valve is arranged between the internal oil path and the first oil inlet pipe.

[0031] The second one-way valve is arranged between the second oil inlet pipe and the oil outlet end of the hand pump.

[0032] Further, the oil tank is provided with a refueling port communicated with the inner cavity of the oil tank.

[0033] One end of the refueling port is arranged on the top plate, and the other end of the refueling port is provided with a breathing cap for filtering air.

[0034] Compared with the prior art, the utility model has the following beneficial effects:

[0035] The hydraulic oil pump is arranged in the oil tank through the fixing block, and the internal oil passage on the fixing block connects the oil outlet of the hydraulic oil pump with the reversing valve, so that the size of the wing opening hydraulic system is effectively reduced.

[0036] The control valve group is a superimposed valve group, and the size of the wing opening hydraulic system is effectively reduced.

[0037] The hand pump is additionally arranged, and the use flexibility of the wing opening hydraulic system is improved.

[0038] The above description and the following description of the embodiments are used to demonstrate and explain the spirit and principle of the utility model, and provide further explanation of the patent application range of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0039] The specific embodiments of the utility model will be further described in detail below with reference to the drawings.

[0040] Figure 1 It is a structure schematic view of the wing opening hydraulic system in the utility model;

[0041] Figure 2 It is a hydraulic principle diagram of the wing opening hydraulic system in the utility model;

[0042] Figure 3 It is an explosion schematic view of the partial structure of the wing opening hydraulic system in the utility model;

[0043] Figure 4 It is a schematic view of the internal oil passage of the fixing block and the hydraulic oil pump in the utility model;

[0044] Figure 5 It is a schematic view of the internal oil passage of the fixing block in the utility model.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 1, tank; 11, top plate; 12, oil filler; 13, breathing cap; 14, handle; 15, mounting bracket; 2, hydraulic oil pump; 21, oil suction filter element; 22, second bolt; 3, motor; 31, first bolt; 4, lifting cylinder; 5, flange; 51, nut; 6, fixed block; 61, internal oil circuit; 611, first oil circuit; 612, second oil circuit; 613, third oil circuit; 614, fourth oil circuit; 62, overflow valve; 63, first one-way valve; 7, control valve group; 71, reversing valve; 72, first one-way throttle valve; 73, hydraulic lock; 731, left one-way valve; 732, right one-way valve; 74, second one-way throttle valve; 75, oil circuit block; 81, oil outlet pipe; 82, first oil inlet pipe; 83, second oil inlet pipe; 9, hand pump. DETAILED DESCRIPTION

[0047] The other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the present description. Although the description of the present application will be introduced in combination with the preferred embodiments, this does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0048] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] The terms "first", "second", and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present embodiment, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "provided with", "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0051] The present application discloses a wing opening hydraulic system suitable for being assembled on a vehicle compartment to drive the vehicle door to open or close.

[0052] Please refer to Figures 1-3 As shown in the figure, the wing opening hydraulic system comprises an oil tank 1, a hydraulic oil pump 2, a motor 3, a lifting oil cylinder 4 and a control valve group 7.

[0053] Among them, the oil tank 1 is suitable for being installed on the vehicle compartment. In the present embodiment, the oil tank 1 is a rectangular box body, comprising a top plate 11 horizontally arranged at the top, a bottom plate horizontally arranged at the bottom and four side plates vertically arranged between the top plate 11 and the bottom plate.

[0054] The inner wall of the top plate 11 is welded with a flange 5. The flange 5 is vertically arranged in the inner cavity of the oil tank 1. The center of the flange 5 is vertically provided with an inner hole. The top plate 11 is provided with a mounting through hole, which is arranged opposite to the inner hole of the flange 5. The outer wall of the top plate 11 is provided with a fixing block 6 for sealing the mounting through hole. The fixing block 6 is vertically arranged at the top of the oil tank 1. The fixing block 6 is provided with an internal oil passage 61. The control valve group 7 is also arranged at the top of the oil tank 1, i.e. on the outer wall of the top plate 11.

[0055] The hydraulic oil pump 2 is placed in the oil tank 1 and mounted on the fixing block 6. The motor 3 is placed outside the oil tank 1 and mounted on the fixing block 6. The driving end of the motor 3 penetrates through the fixing block 6 and is connected with the hydraulic oil pump 2 to drive the hydraulic oil pump 2 to work. The oil inlet of the hydraulic oil pump 2 is provided with an oil suction filter 21. The oil outlet of the hydraulic oil pump 2 is connected with the oil inlet of the internal oil passage 61. The oil outlet of the internal oil passage 61 is connected with the reversing valve 71 of the control valve group 7. The reversing valve 71 is connected with the inner cavity of the oil tank 1 through an oil outlet pipe 81. The inner cavity of the oil tank 1 and the internal oil passage 61 are provided with an overflow valve 62, which is used as a safety valve of the wing opening hydraulic system. The overflow valve 62 is mounted on the fixing block 6. The fixed end of the lifting oil cylinder 4 is suitable for being installed on the main body of the vehicle compartment. The driving end of the lifting oil cylinder 4 is suitable for being connected with the vehicle door of the vehicle compartment to drive the vehicle door to open or close. The rodless cavity and the rod cavity of the lifting oil cylinder 4 are respectively connected with the reversing valve 71.

[0056] The reversing valve 71 is adapted to switch by itself to connect the rodless cavity with the oil outlet of the internal oil circuit 61 and connect the rod cavity with the oil outlet pipe 81, at this time, the motor 3 drives the hydraulic oil pump 2 to work to inject the hydraulic oil in the oil tank 1 into the rodless cavity, the hydraulic oil in the rod cavity returns to the oil tank 1, that is, the driving end of the lifting oil cylinder 4 performs the lifting action to drive the door to open. The reversing valve 71 is also adapted to switch by itself to connect the rodless cavity with the oil outlet pipe 81 and connect the rod cavity with the oil outlet of the internal oil circuit 61, at this time, the motor 3 drives the hydraulic oil pump 2 to work to inject the hydraulic oil in the oil tank 1 into the rod cavity, the hydraulic oil in the rodless cavity returns to the oil tank 1, that is, the driving end of the lifting oil cylinder 4 performs the contraction action to drive the door to close.

[0057] In the embodiment, as shown in the figure, Figure 1 The oil tank 1 is provided with a filling port 12 communicated with the inner cavity of the oil tank 1. One end of the filling port 12 is arranged on the top plate 11, and the other end of the filling port 12 is provided with a breather cap 13 for filtering air. The oil tank 1 is provided with an oil mirror on the four side plates. The oil tank 1 is provided with a handle 14 on both sides. The oil tank 1 is provided with a drain port on the bottom plate. The outer side wall of the oil tank 1 is also provided with a mounting bracket 15. The oil tank 1 is adapted to be mounted on the whole vehicle through the mounting bracket 15.

[0058] In the embodiment, as shown in the figure, Figure 3 The flange 5 includes a horizontally arranged connecting plate and a vertically arranged connecting cylinder. The connecting cylinder is arranged at the bottom of the connecting plate. The connecting plate of the flange 5 is fixed with nuts 51 at four corners. The top plate 11 is provided with connecting through holes arranged opposite to the inner holes of the nuts 51. The four corners of the fixed block 6 are threadedly connected with the inner holes of the corresponding nuts 51 through corresponding bolts. The shanks of the bolts pass through the fixed block 6 and the connecting through holes in sequence and are connected with the nuts 51. The first sealing ring is arranged between the fixed block 6 and the top plate 11 to prevent the hydraulic oil in the oil tank 1 from leaking to the outside of the oil tank 1 through the connecting through holes. The lower end of the fixed block 6 extends downward into the inner hole of the flange 5, and the second sealing ring is arranged between the lower end of the fixed block 6 and the inner hole of the flange 5 (i.e. the inner hole of the connecting cylinder). The hydraulic oil pump 2 is arranged in the inner hole of the connecting cylinder.

[0059] In the embodiment, as shown in the figure, Figure 3 The motor 3 is fixed on the top of the fixed block 6 through the first bolt 31. The shank of the first bolt 31 passes through the motor 3 and is threadedly connected with the first threaded hole on the fixed block 6. The hydraulic oil pump 2 is fixed on the bottom of the fixed block 6 through the second bolt 22. The shank of the second bolt 22 passes through the hydraulic oil pump 2 and is threadedly connected with the second threaded hole on the fixed block 6. The first threaded hole and the second threaded hole are both blind holes to prevent the hydraulic oil in the oil tank 1 from leaking to the outside of the oil tank 1 through the first threaded hole and the second threaded hole.

[0060] Please refer toFigures 1-2 As shown in the figure, the control valve group 7 includes a reversing valve 71, a first one-way throttle valve 72, a hydraulic lock 73, and a second one-way throttle valve 74. Among them, the rodless cavity is connected with the reversing valve 71 via the first one-way throttle valve 72 and the hydraulic lock 73 in turn. The rod cavity is connected with the reversing valve 71 via the second one-way throttle valve 74 and the hydraulic lock 73 in turn.

[0061] In this embodiment, the first one-way throttle valve 72 is composed of a corresponding throttle valve and a one-way valve in parallel to form a one-way throttle valve. The hydraulic lock 73 is composed of a left one-way valve 731 and a right one-way valve 732. The second one-way throttle valve 74 is composed of a corresponding throttle valve and a one-way valve in parallel to form a one-way throttle valve.

[0062] Among them, the one-way throttle valve and the hydraulic lock are prior art, so they will not be described in detail.

[0063] In this embodiment, in order to save space, the control valve group 7 is a stacked valve group. Specifically, the reversing valve 71 is a stacked reversing valve. The hydraulic lock 73 is a stacked hydraulic lock. The first one-way throttle valve 72 and the second one-way throttle valve 74 are both stacked throttle valves. Please refer to Figure 1 As shown in the figure, the control valve group 7 also includes an oil passage block 75. The stacked reversing valve, the stacked hydraulic lock, the stacked throttle valve, and the oil passage block 75 are sequentially stacked from top to bottom, and the oil passage block 75 is fixed on the outer wall of the top plate 11. The oil outlet of the internal oil passage 61 is connected with the reversing valve 71 via the first oil inlet pipe 82 and the internal oil passage of the oil passage block 75 in turn. The oil inlet of the oil outlet pipe 81 is connected with the reversing valve 71 via the internal oil passage of the oil passage block 75.

[0064] Among them, the oil passage block 75 is provided with a plurality of internal oil passages. The oil outlet pipe 81 and the first oil inlet pipe 82 are both installed on the oil passage block 75 and connected with the corresponding internal oil passages. The stacked hydraulic lock and the stacked throttle valve are provided with a plurality of through holes. The control valve group 7 realizes the communication of the corresponding oil passages between the structures in the control valve group 7 through the plurality of internal oil passages of the oil passage block 75, the through holes on the stacked hydraulic lock and the stacked throttle valve, and the external connecting oil pipes.

[0065] The stacked valve group is prior art, so it will not be described in detail.

[0066] In this embodiment, the reversing valve 71 is a three-position four-way reversing valve. The reversing valve 71 is provided with left, middle and right oil passages in turn, that is, the reversing valve 71 has left, middle and right states.

[0067] Please refer to Figure 2 As shown in the figure, the working principle of the wing opening hydraulic system is as follows:

[0068] When the reversing valve 71 is in the left position, the outlet of the internal oil circuit 61 is connected to the second one-way throttle valve 74 through the hydraulic lock 73. Specifically, the motor 3 drives the hydraulic oil pump 2 to work, so that the hydraulic oil in the tank 1 is injected into the rod cavity in turn through the reversing valve 71, the right one-way valve 732 of the hydraulic lock 73 and the one-way valve in the second one-way throttle valve 74; at the same time, the left one-way valve 731 of the hydraulic lock 73 is opened to drain, that is, the hydraulic oil in the rod cavity is returned to the tank 1 through the outlet pipe 81 in turn through the throttle valve in the first one-way throttle valve 72, the left one-way valve 731 of the hydraulic lock 73 and the reversing valve 71. At this time, the driving end of the lifting oil cylinder 4 performs the contraction action.

[0069] When the reversing valve 71 is in the middle position, the lifting oil cylinder 4 is in the static state under the action of the left one-way valve 731 and the right one-way valve 732 of the hydraulic lock 73, that is, at this time, the driving end of the lifting oil cylinder 4 is static.

[0070] When the reversing valve 71 is in the right position, the outlet of the internal oil circuit 61 is connected to the first one-way throttle valve 72 through the hydraulic lock 73. Specifically, the motor 3 drives the hydraulic oil pump 2 to work, so that the hydraulic oil in the tank 1 is injected into the rod cavity in turn through the reversing valve 71, the left one-way valve 731 of the hydraulic lock 73 and the one-way valve in the first one-way throttle valve 72; at the same time, the right one-way valve 732 of the hydraulic lock 73 is opened to drain, that is, the hydraulic oil in the rod cavity is returned to the tank 1 through the outlet pipe 81 in turn through the throttle valve in the second one-way throttle valve 74, the right one-way valve 732 of the hydraulic lock 73 and the reversing valve 71. At this time, the driving end of the lifting oil cylinder 4 performs the lifting action.

[0071] Further, please refer to Figure 2 , Figure 4 and Figure 5As shown, the first one-way valve 63 is arranged between the internal oil circuit 61 and the reversing valve 71. The first one-way valve 63 is arranged on the fixed block 6. Specifically, the internal oil circuit 61 includes a first oil circuit 611, a second oil circuit 612, a third oil circuit 613 and a fourth oil circuit 614. The second oil circuit 612 is horizontally arranged and extends along the left-right direction, and is arranged on the side wall of the fixed block 6. The first one-way valve 63 is connected to the left end of the second oil circuit 612, and the overflow valve 62 is connected to the right end of the second oil circuit 612. The first oil circuit 611 is vertically arranged at the bottom of the fixed block 6. The lower end of the first oil circuit 611 is an oil inlet connected to the oil outlet of the hydraulic oil pump 2. The upper end of the first oil circuit 611 is connected to the middle section of the second oil circuit 612. The third oil circuit 613 is horizontally arranged and extends along the front-rear direction, and is arranged on the side wall of the fixed block 6. One end of the third oil circuit 613 is connected to the first one-way valve 63, and the other end of the third oil circuit 613 is an oil outlet connected to the first oil inlet pipe 82. The fourth oil circuit 614 is vertically arranged at the bottom of the fixed block 6. The upper end of the fourth oil circuit 614 is connected to the overflow valve 62, and the lower end of the fourth oil circuit 614 is connected to the inner cavity of the oil tank 1.

[0072] Further, in order to improve the flexibility of the wing opening hydraulic system, the wing opening hydraulic system further includes a hand pump 9. The hand pump 9 is fixed on the outer wall of the top plate 11. The oil inlet end of the hand pump 9 extends to the inner cavity of the oil tank 1, and the oil outlet end of the hand pump 9 is arranged outside the oil tank 1. A sealing ring is arranged between the hand pump 9 and the oil tank 1 to prevent leakage of the oil tank 1.

[0073] The oil outlet of the internal oil circuit 61 is connected to the reversing valve 71 through the first oil inlet pipe 82. The oil outlet end of the hand pump 9 is connected to the first oil inlet pipe 82 through the second oil inlet pipe 83, so as to realize the connection between the oil outlet end of the hand pump 9 and the reversing valve 71.

[0074] Further, a second one-way valve is arranged between the second oil inlet pipe 83 and the oil outlet end of the hand pump 9, so as to prevent the oil outlet end of the hand pump 9 from being connected to the oil outlet of the hydraulic oil pump 2, thereby effectively protecting the hand pump 9 and the hydraulic oil pump 2. The second one-way valve is arranged on the hand pump 9.

[0075] In this embodiment, the wing opening hydraulic system is a four-door wing opening hydraulic system. The four-door wing opening hydraulic system includes one oil tank 1, one hydraulic oil pump 2, one motor 3, one hand pump 9, four control valve groups 7 and eight lifting oil cylinders 4. The four-door wing opening hydraulic system is suitable for simultaneously controlling four doors to be opened or closed. Each door corresponds to one control valve group 7 and two lifting oil cylinders 4. The hydraulic oil output by the oil outlet pipe 81 is suitable for flowing into the corresponding lifting oil cylinder 4 through the four control valve groups 7.

[0076] In the embodiment, the wing opening hydraulic system further comprises a controller. The controller is arranged on the whole vehicle and connected with the control valve group 7 and the motor 3 respectively. The controller controls the switching of the reversing valve 71 to the left position, the middle position or the right position, and controls the opening or closing of the motor 3, thereby controlling the opening or closing of the door by the lifting oil cylinder 4. Specifically, the controller is connected with the reversing valve 71 and the motor 3 respectively.

[0077] In general, the hydraulic oil pump is arranged in the oil tank through the fixing block, the internal oil passage on the fixing block is connected with the oil outlet of the hydraulic oil pump and the reversing valve, the volume of the wing opening hydraulic system is effectively reduced, the fixing block serves as a connecting block for fixation and an oil passage block, space is effectively saved, the control valve group is a superimposed valve group, the volume of the wing opening hydraulic system is effectively reduced, and the use flexibility of the wing opening hydraulic system is improved through the additional hand pump.

[0078] The above embodiment only illustrates the principle and effect of the utility model, and is not used for limiting the utility model. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A wing-opening hydraulic system suitable for driving the opening or closing of a vehicle's doors, characterized in that, The wing-opening hydraulic system includes an oil tank (1), a hydraulic oil pump (2), an electric motor (3), and a lifting cylinder (4). The oil tank (1) is suitable for installation on a carriage; a flange (5) is welded to the inner wall of the top plate (11) of the oil tank (1), and an installation through hole is provided on the top plate (11) with the inner hole of the flange (5) being opposite to the inner hole; a fixing block (6) for sealing the installation through hole is provided on the outer wall of the top plate (11), and an internal oil passage (61) is provided on the fixing block (6). The hydraulic oil pump (2) is placed inside the oil tank (1) and mounted on the fixed block (6); the motor (3) is placed outside the oil tank (1) and mounted on the fixed block (6), the drive end of the motor (3) passes through the fixed block (6) and is connected to the hydraulic oil pump (2); the oil inlet of the internal oil circuit (61) is connected to the oil outlet of the hydraulic oil pump (2), the oil outlet of the internal oil circuit (61) is connected to the reversing valve (71), and an oil outlet pipe (81) is connected between the reversing valve (71) and the inner cavity of the oil tank (1); an overflow valve (62) is provided between the inner cavity of the oil tank (1) and the internal oil circuit (61), and the overflow valve (62) is mounted on the fixed block (6); The fixed end of the lifting cylinder (4) is adapted to be installed on the carriage, and its driving end is adapted to drive the carriage door to open or close; the rodless chamber and the rod chamber of the lifting cylinder (4) are respectively connected to the reversing valve (71); the reversing valve (71) is adapted to switch by itself so that the rodless chamber is connected to the oil outlet of the internal oil circuit (61) and the rod chamber is connected to the oil outlet pipe (81), or so that the rodless chamber is connected to the oil outlet pipe (81) and the rod chamber is connected to the oil outlet of the internal oil circuit (61).

2. The wing-opening hydraulic system according to claim 1, characterized in that, It also includes a control valve assembly (7) disposed on the outer wall of the top plate (11), the control valve assembly (7) including a reversing valve (71), a first one-way throttle valve (72), a hydraulic lock (73), and a second one-way throttle valve (74); The rodless chamber is connected to the directional control valve (71) via the first one-way throttle valve (72) and the hydraulic lock (73) in sequence; the rod chamber is connected to the directional control valve (71) via the second one-way throttle valve (74) and the hydraulic lock (73) in sequence.

3. The wing-opening hydraulic system according to claim 2, characterized in that, The reversing valve (71) is a three-position four-way reversing valve, and the reversing valve (71) is provided with left position, middle position and right position oil passages in sequence. The oil outlet of the internal oil circuit (61) is adapted to be connected to the second one-way throttle valve (74) via a hydraulic lock (73) when the reversing valve (71) is in the left position. The oil outlet of the internal oil circuit (61) is adapted to be connected to the first one-way throttle valve (72) via a hydraulic lock (73) when the reversing valve (71) is in the right position. The lifting cylinder (4) is adapted to be stationary in the rod chamber and the rodless chamber under the action of the hydraulic lock (73) when the reversing valve (71) is in the neutral position.

4. The wing-opening hydraulic system according to claim 2, characterized in that, The control valve assembly (7) also includes an oil passage block (75); The reversing valve (71) is a stacked reversing valve; the hydraulic lock (73) is a stacked hydraulic lock; the first one-way throttle valve (72) and the second one-way throttle valve (74) are both stacked throttle valves; The stacked directional valve, the stacked hydraulic lock, the stacked throttle valve and the oil circuit block (75) are stacked sequentially from top to bottom, and the oil circuit block (75) is fixed to the outer wall of the top plate (11); The oil outlet of the internal oil passage (61) is connected to the reversing valve (71) after passing through the first oil inlet pipe (82) and the internal oil passage of the oil passage block (75) in sequence. The oil inlet of the oil outlet pipe is connected to the reversing valve (71) after passing through the internal oil passage of the oil circuit block (75).

5. The wing-opening hydraulic system according to claim 1, characterized in that, Nuts (51) are fixed at the four corners of the flange (5), and a connecting through hole is provided on the top plate (11) with the inner holes of the nuts (51) being arranged opposite to each other. The four corners of the fixing block (6) are connected to the inner hole of the nut (51) by bolts; the bolt thread passes through the fixing block (6) and the connecting through hole in sequence and is connected to the nut (51); a first sealing ring is provided between the fixing block (6) and the top plate (11), and the first sealing ring is arranged opposite to the connecting through hole; The lower end of the fixing block (6) extends into the inner hole of the flange (5), and a second sealing ring is provided between the lower end of the fixing block (6) and the inner hole of the flange (5).

6. The wing-opening hydraulic system according to claim 1, characterized in that, The motor (3) is fixed to the top of the fixing block (6) by a first bolt (31); the screw of the first bolt (31) passes through the motor (3) and is threadedly connected to the first threaded hole on the fixing block (6); The hydraulic oil pump (2) is fixed to the bottom of the fixed block (6) by a second bolt (22); the screw of the second bolt (22) passes through the hydraulic oil pump (2) and is threadedly connected to the second threaded hole on the fixed block (6); Both the first threaded hole and the second threaded hole are blind holes.

7. The wing-opening hydraulic system according to claim 1, characterized in that, A first check valve (63) is provided between the internal oil passage (61) and the reversing valve (71), and the first check valve (63) is disposed on the fixed block (6).

8. The wing-opening hydraulic system according to claim 1, characterized in that, It also includes a hand-cranked pump (9); the hand-cranked pump (9) is fixed on the outer wall of the top plate (11), its oil inlet extends into the inner cavity of the oil tank (1), and its oil outlet is located outside the oil tank (1); a sealing ring is provided between the hand-cranked pump (9) and the oil tank (1); The oil outlet of the internal oil passage (61) is connected to the reversing valve (71) through the first oil inlet pipe (82); The oil outlet of the hand pump (9) is connected to the first oil inlet pipe (82) through the second oil inlet pipe (83).

9. The wing-opening hydraulic system according to claim 8, characterized in that, A first check valve (63) is provided between the internal oil passage (61) and the first oil inlet pipe (82). A second check valve is provided between the second oil inlet pipe (83) and the oil outlet of the hand pump (9).

10. The wing-opening hydraulic system according to claim 1, characterized in that, The oil tank (1) is provided with an oil filling port (12) that communicates with the inner cavity of the oil tank (1); One end of the oil filling port (12) is located on the top plate (11), and the other end of the oil filling port (12) is equipped with a breathing cap (13) for filtering air.

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