A hydraulic system of a rescue vehicle and the rescue vehicle

Abstract

This utility model relates to a hydraulic system for a rescue vehicle and the rescue vehicle itself. A first solenoid valve is disposed on the oil line between the hydraulic oil tank and the first lifting cylinder; a first bidirectional hydraulic lock is disposed on the oil line between the first solenoid valve and the first lifting cylinder; the hydraulic oil tank and the first tilting cylinder are connected by an oil pipe; a second solenoid valve is disposed on the oil line between the hydraulic oil tank and the first tilting cylinder; a first bidirectional balance valve is disposed on the oil line between the second solenoid valve and the first tilting cylinder; the second solenoid valve is connected to the rodless chamber of the first lifting cylinder by an oil line; the piston rod of the first lifting cylinder has a hollow structure; the rodless chamber of the first lifting cylinder is connected to one end of the piston rod of the first lifting cylinder; the other end of the piston rod of the first lifting cylinder is connected to the first bidirectional balance valve by an oil pipe; a third solenoid valve is disposed on the oil pipe between the other end of the piston rod of the first lifting cylinder and the first bidirectional balance valve.

Description

Technical Field

[0001] This utility model relates to the field of emergency rescue equipment technology, specifically to a hydraulic system for a rescue vehicle and the rescue vehicle itself. Background Technology

[0002] In emergency rescue operations (such as forest fire fighting), long-distance water supply is required, which necessitates long water supply hoses. During use, these hoses need to be laid out and stored, thus requiring rescue vehicles for hose laying.

[0003] Currently, the tailgate of the pipeline laying vehicle is raised, lowered, and tilted by lifting and tilting cylinders. This setup results in a large number of hydraulic lines being laid out, which takes up space in the vehicle. Utility Model Content

[0004] Therefore, a hydraulic system and a rescue vehicle are needed to solve the technical problem of the current pipeline laying vehicle's tailgate, which is driven by lifting cylinders and tilting cylinders to lift and tilt, resulting in a large number of hydraulic lines and occupying cargo space.

[0005] To achieve the above objectives, the inventors provide a hydraulic system for a rescue vehicle, comprising:

[0006] Hydraulic oil tank;

[0007] A hydraulic oil pump, wherein the hydraulic oil pump is connected to the hydraulic oil tank via an oil pipe;

[0008] The first lifting cylinder is connected to the hydraulic oil tank via an oil pipe. The first lifting cylinder is used to drive the tilting door of the rescue vehicle to lift up and down.

[0009] A first solenoid valve is disposed on the oil line between the hydraulic oil tank and the first lifting cylinder.

[0010] The first bidirectional hydraulic lock is disposed on the oil line between the first solenoid valve and the first lifting cylinder;

[0011] The first tilting cylinder is connected to the hydraulic oil tank via an oil pipe. The first tilting cylinder is used to drive the tilting door of the rescue vehicle to tilt up and down.

[0012] The second solenoid valve is disposed in the oil line between the hydraulic oil tank and the first tilting cylinder;

[0013] The first bidirectional balance valve is disposed on the oil line between the second solenoid valve and the first tilting cylinder. The second solenoid valve is connected to the rodless chamber of the first lifting cylinder through an oil line. The piston rod of the first lifting cylinder has a hollow structure. The rodless chamber of the first lifting cylinder is connected to one end of the piston rod of the first lifting cylinder. The other end of the piston rod of the first lifting cylinder is connected to the first bidirectional balance valve through an oil pipe.

[0014] And a third solenoid valve, which is located on the oil pipe between the other end of the piston rod of the first lifting cylinder and the first bidirectional balance valve.

[0015] As a preferred structure of this utility model, the hydraulic system of the rescue vehicle further includes a second lifting cylinder. The hydraulic oil tank is connected to the second lifting cylinder through an oil pipe. The second lifting cylinder is connected in parallel with the first lifting cylinder. The second lifting cylinder is used to drive the lowering door of the rescue vehicle to move up and down.

[0016] The second bidirectional hydraulic lock is disposed in the oil line between the first solenoid valve and the second lifting cylinder;

[0017] The second tilting cylinder is connected to the hydraulic tank via an oil pipe. The second tilting cylinder is connected in parallel with the first tilting cylinder. The second tilting cylinder is used to drive the tilting door of the rescue vehicle to tilt up and down.

[0018] The second bidirectional balance valve is located in the oil circuit between the second solenoid valve and the second tilting cylinder. The second solenoid valve is connected to the rodless chamber of the second lifting cylinder through an oil circuit. The piston rod of the second lifting cylinder has a hollow structure. The rodless chamber of the second lifting cylinder is connected to one end of the piston rod of the second lifting cylinder. The other end of the piston rod of the second lifting cylinder is connected to the second bidirectional balance valve through an oil pipe.

[0019] And a fourth solenoid valve, which is located on the oil pipe between the other end of the piston rod of the second lifting cylinder and the second bidirectional balance valve.

[0020] As a preferred structure of this utility model, the hydraulic system of the rescue vehicle further includes an overflow valve and an overflow pipeline. One end of the overflow pipeline is connected to the hydraulic oil tank, and the other end of the overflow pipeline is connected to the first solenoid valve and / or the second solenoid valve. The overflow valve is disposed on the overflow pipeline.

[0021] The advantages of the above technical solution, which differ from the existing technology, are as follows: When the hydraulic system of the rescue vehicle of this utility model needs to drive the tilting door of the rescue vehicle to descend, the hydraulic oil pump is started, the left side of the first solenoid valve is energized, and the second and third solenoid valves are de-energized. The hydraulic oil flows from the left side of the first solenoid valve to the first bidirectional hydraulic lock, and the high-pressure hydraulic oil flows from the left side of the first bidirectional hydraulic lock into the rodless chamber of the first lifting cylinder, thereby pushing the piston rod of the first lifting cylinder out to drive the tilting door to descend. The high-pressure hydraulic oil flowing in from the left side of the first bidirectional hydraulic lock will open the right side check valve of the first bidirectional hydraulic lock to allow the hydraulic oil to flow. Next, the emergency vehicle's tilting door is driven to tilt outwards to open it. At this time, the left side of the second solenoid valve is energized, the third solenoid valve is energized, and the first solenoid valve is de-energized. Hydraulic oil flows from the left side of the second solenoid valve into the rodless chamber of the first lifting cylinder. Since the piston rod of the first lifting cylinder has a hollow structure, it can serve as an oil circuit, reducing the oil circuit layout and space occupation, resulting in a compact structure. When the third solenoid valve is energized, hydraulic oil flows from the other end of the piston rod of the first lifting cylinder into the left side of the first two-way balance valve. High-pressure hydraulic oil flows from the left side of the first two-way balance valve into the rodless chamber of the first tilting cylinder, thereby pushing the piston rod of the first tilting cylinder outwards to drive the tilting door to tilt outwards and open. The high-pressure hydraulic oil flowing from the left side of the first two-way balance valve will open the right side check valve of the first two-way balance valve to allow hydraulic oil to flow. In the hydraulic system of the rescue vehicle of this utility model, the piston rod of the first lifting cylinder is connected to the working oil circuit of the first tilting cylinder, which can reduce the oil circuit layout, reduce the space occupied, and make the structure compact. Furthermore, by providing a first bidirectional hydraulic lock, when the first lifting cylinder drives the tilting door to lift, the tilting door can be stopped at any position and maintained in that state, which is convenient for the tilting door to be at different heights and for the staff to work.

[0022] To achieve the above objectives, the inventor provides a rescue vehicle, comprising:

[0023] Chassis mechanism;

[0024] The carriage is mounted on the frame mechanism;

[0025] A control system for controlling the operation of the emergency rescue vehicle;

[0026] And the hydraulic system of the rescue vehicle as described in any of the above-mentioned inventors, wherein the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve of the hydraulic system are electrically connected to the control system.

[0027] As a preferred structure of this utility model, the carriage includes:

[0028] Box body,

[0029] A compartment door is located on one side of the compartment body and is hinged to the compartment body;

[0030] A lifting mechanism is provided inside the compartment, and the compartment door is movably connected to the lifting mechanism. The lifting mechanism is used to drive the compartment door to rise or fall.

[0031] And a tilting cylinder, one end of which is connected to the lifting mechanism and the other end of which is connected to the door. The tilting cylinder is used to tilt the door to open or close it.

[0032] As a preferred structure of this utility model, the compartment door includes an upward-opening door and a downward-opening door;

[0033] The upward-opening door and the downward-opening door are arranged opposite each other along the height direction of the compartment. The upward-opening door is located above the downward-opening door. The upward-opening door is hinged to the top of the compartment and is used to open upward.

[0034] The downward-opening door is movably connected to the lifting mechanism, and the downward-opening door is used to open downwards.

[0035] As a preferred structure of this utility model, the rescue vehicle also includes an upward tilting mechanism, one end of which is connected to the body and the other end of which is connected to the upward tilting door. The upward tilting mechanism is used to flip the upward tilting door to open or close it.

[0036] As a preferred structure of this utility model, there are two lifting mechanisms, which are respectively arranged inside the compartment on both sides of the width direction of the compartment;

[0037] There are two tilting cylinders, and one end of each tilting cylinder is connected to one of the two lifting mechanisms respectively.

[0038] As a preferred structure of this utility model, the lifting mechanism includes a lifting cylinder and a lifting connecting component;

[0039] One end of the lifting cylinder is connected to the box body, the other end of the lifting cylinder is connected to one end of the lifting connecting component, and the downward-opening door is connected to the other end of the lifting connecting component;

[0040] One end of the tilting cylinder is connected to the lifting connecting component.

[0041] As a preferred structure of this utility model, the lifting mechanism further includes a sliding component, and the connecting component is slidably connected to the inner wall of the compartment through the sliding component.

[0042] As a preferred structure of this utility model, the sliding component includes a sliding groove and a pulley. The sliding groove is disposed on the inner wall of the compartment, and the pulley is disposed on the connecting component. The pulley and the sliding groove cooperate with each other for sliding.

[0043] As a preferred structure of this utility model, the rescue vehicle further includes a rolling component, which is disposed on the inner wall of the downward-opening door.

[0044] The advantages of the above technical solution, which differ from the existing technology, are as follows: In the emergency rescue vehicle of this utility model, when the hydraulic system of the emergency rescue vehicle needs to drive the tilting door of the emergency rescue vehicle to descend, the hydraulic oil pump is activated, the left side of the first solenoid valve is energized, and the second and third solenoid valves are de-energized. The hydraulic oil flows from the left side of the first solenoid valve to the first bidirectional hydraulic lock, and the high-pressure hydraulic oil flows from the left side of the first bidirectional hydraulic lock into the rodless chamber of the first lifting cylinder, thereby pushing the piston rod of the first lifting cylinder out to drive the tilting door to descend. The high-pressure hydraulic oil flowing in from the left side of the first bidirectional hydraulic lock will open the right side check valve of the first bidirectional hydraulic lock to allow hydraulic oil to flow. Next, the emergency vehicle's tilting door is driven to tilt outwards to open it. At this time, the left side of the second solenoid valve is energized, the third solenoid valve is energized, and the first solenoid valve is de-energized. Hydraulic oil flows from the left side of the second solenoid valve into the rodless chamber of the first lifting cylinder. Since the piston rod of the first lifting cylinder has a hollow structure, it can serve as an oil circuit, reducing the oil circuit layout and space occupation, resulting in a compact structure. When the third solenoid valve is energized, hydraulic oil flows from the other end of the piston rod of the first lifting cylinder into the left side of the first two-way balance valve. High-pressure hydraulic oil flows from the left side of the first two-way balance valve into the rodless chamber of the first tilting cylinder, thereby pushing the piston rod of the first tilting cylinder outwards to drive the tilting door to tilt outwards and open. The high-pressure hydraulic oil flowing from the left side of the first two-way balance valve will open the right side check valve of the first two-way balance valve to allow hydraulic oil to flow. In the hydraulic system of the rescue vehicle of this utility model, the piston rod of the first lifting cylinder is connected to the working oil circuit of the first tilting cylinder, which can reduce the oil circuit layout, reduce the space occupied, and make the structure compact. Furthermore, by providing a first bidirectional hydraulic lock, when the first lifting cylinder drives the tilting door to lift, the tilting door can be stopped at any position and maintained in that state, which is convenient for the tilting door to be at different heights and for the staff to work.

[0045] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0046] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0047] In the accompanying drawings of the instruction manual:

[0048] Figure 1 A schematic diagram of the hydraulic system for driving the lowering door to descend using the first and second lifting cylinders in a specific implementation method;

[0049] Figure 2 A schematic diagram of the hydraulic system for driving the tilting door to rise using the first and second lifting cylinders in a specific implementation method;

[0050] Figure 3 A schematic diagram of the hydraulic system in which the first and second tilting cylinders drive the tilting door to tilt outwards, as shown in the specific implementation method;

[0051] Figure 4 A schematic diagram of the hydraulic system in which the first and second tilting cylinders drive the tilting door to tilt inward in a specific embodiment;

[0052] Figure 5 This is a schematic diagram of the circuit connection of the emergency rescue vehicle described in the specific implementation method;

[0053] Figure 6 This is a schematic diagram of the structure of the emergency rescue vehicle described in the specific implementation method;

[0054] Figure 7 This is a front view of the rescue vehicle described in the specific implementation method;

[0055] Figure 8 This is one of the partial structural schematic diagrams of the carriage described in the specific embodiment;

[0056] Figure 9 This is a second partial structural schematic diagram of the carriage described in the specific embodiment. The reference numerals in the above figures are explained as follows:

[0057] 1. Chassis structure,

[0058] 2. Train carriage,

[0059] 21. Body,

[0060] 22. Side door,

[0061] 221. Upward-opening door.

[0062] 222. Downward-opening door.

[0063] 3. Lifting mechanism,

[0064] 31. Lifting cylinder,

[0065] 32. Lifting connecting components,

[0066] 33. Sliding component,

[0067] 331. Slide groove,

[0068] 332. Pulley,

[0069] 4. Control system

[0070] 5. Tilting the hydraulic cylinder,

[0071] 6. Upward tilting mechanism,

[0072] 7. Rolling components,

[0073] 8. Hydraulic system,

[0074] 81. Hydraulic oil tank,

[0075] 82. Hydraulic oil pump

[0076] 83. First lifting cylinder,

[0077] 84. First solenoid valve,

[0078] 85. First bidirectional hydraulic lock,

[0079] 86. First tilting cylinder,

[0080] 87. Second solenoid valve,

[0081] 88. First bidirectional balancing valve,

[0082] 89. The third solenoid valve,

[0083] 810. Second lifting cylinder,

[0084] 811. Second bidirectional hydraulic lock,

[0085] 812. Second tilting cylinder,

[0086] 813. Second bidirectional balancing valve,

[0087] 814. Fourth solenoid valve,

[0088] 815. Overflow pipe,

[0089] 816. Overflow valve. Detailed Implementation

[0090] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0091] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0092] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0093] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0094] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0095] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0096] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0097] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. These expressions are only for the convenience of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. Furthermore, in this context, it should be understood that when it is mentioned that an element is connected "on" or "below" another element, it can be directly connected not only to the other element "on" or "below," but also indirectly connected to the other element "on" or "below" through an intermediate element.

[0098] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0099] Please see Figures 1 to 5 This embodiment relates to a hydraulic system 8 of a rescue vehicle, comprising:

[0100] Hydraulic oil tank 81, wherein hydraulic oil tank 81 is used to hold hydraulic oil.

[0101] The hydraulic oil pump 82 is connected to the hydraulic oil tank 81 via an oil pipe. The hydraulic oil pump 82 is used to draw hydraulic oil from the hydraulic oil tank 81 to the first lifting cylinder 83, the second lifting cylinder 810, the first tilting cylinder 86, and the second tilting cylinder 812 of the hydraulic system 8.

[0102] The first lifting cylinder 83 is connected to the hydraulic oil tank 81 via an oil pipe. The first lifting cylinder 83 is used to drive the flip-down door 222 of the rescue vehicle to move up and down. It is easy to operate and saves time and effort.

[0103] The first solenoid valve 84 is disposed in the oil circuit between the hydraulic oil tank 81 and the first lifting cylinder 83, wherein the first solenoid valve 84 is used to open and close the oil circuit.

[0104] The first bidirectional hydraulic lock 85 is disposed on the oil line between the first solenoid valve 84 and the first lifting cylinder 83.

[0105] The first tilting cylinder 86 is connected to the hydraulic oil tank 81 via an oil pipe. The first tilting cylinder 86 is used to drive the downward tilting door 222 of the rescue vehicle to tilt up and down to open or close the upward tilting door 221. The operation is simple, time-saving and labor-saving.

[0106] The second solenoid valve 87 is disposed in the oil circuit between the hydraulic oil tank 81 and the first tilting cylinder 86; wherein the second solenoid valve 87 is used to open and close the oil circuit.

[0107] A first bidirectional balance valve 88 is disposed in the oil circuit between the second solenoid valve 87 and the first tilting cylinder 86. The second solenoid valve 87 is connected to the rodless chamber of the first lifting cylinder 83 via an oil circuit. The piston rod of the first lifting cylinder 83 has a hollow structure, which can serve as an oil circuit, reducing the oil circuit layout, reducing space occupation, and resulting in a compact structure. The rodless chamber of the first lifting cylinder 83 is connected to one end of the piston rod of the first lifting cylinder 83, and the other end of the piston rod of the first lifting cylinder 83 is connected to the first bidirectional balance valve 88 via an oil pipe. In other embodiments, the first bidirectional balance valve 88 can also be replaced by a bidirectional hydraulic lock.

[0108] And a third solenoid valve 89, which is disposed on the oil pipe between the other end of the piston rod of the first lifting cylinder 83 and the first bidirectional balance valve 88, wherein the third solenoid valve 89 is used to open and close the oil circuit.

[0109] Specifically, in this embodiment, when the hydraulic system 8 of the rescue vehicle needs to drive the tilting door 222 of the rescue vehicle to descend, the hydraulic oil pump 82 is activated, the left side of the first solenoid valve 84 is energized, and the second solenoid valve 87 and the third solenoid valve 89 are de-energized. The hydraulic oil flows from the left side of the first solenoid valve 84 to the first bidirectional hydraulic lock 85, and the high-pressure hydraulic oil flows from the left side of the first bidirectional hydraulic lock 85 into the rodless chamber of the first lifting cylinder 83, thereby pushing the piston rod of the first lifting cylinder 83 out to drive the tilting door 222 to descend. The high-pressure hydraulic oil flowing from the left side of the first bidirectional hydraulic lock 85 will open the one-way valve on the right side of the first bidirectional hydraulic lock 85 to allow the hydraulic oil to flow. Next, the emergency vehicle's tilting door 222 is driven to tilt outwards to open it. At this time, the left side of the second solenoid valve 87 is energized, the third solenoid valve 89 is energized, and the first solenoid valve 84 is de-energized. Hydraulic oil flows from the left side of the second solenoid valve 87 into the rodless chamber of the first lifting cylinder 83. Since the piston rod of the first lifting cylinder 83 is hollow, it can serve as an oil circuit, reducing the oil circuit layout and space occupation, resulting in a compact structure. When the third solenoid valve 89 is energized, hydraulic oil flows from the other end of the piston rod of the first lifting cylinder 83 into the left side of the first two-way balance valve 88. High-pressure hydraulic oil flows from the left side of the first two-way balance valve 88 into the rodless chamber of the first tilting cylinder 86, thereby pushing the piston rod of the first tilting cylinder 86 outwards to drive the tilting door 222 to tilt outwards and open. The high-pressure hydraulic oil flowing from the left side of the first two-way balance valve 88 will open the right side check valve of the first two-way balance valve 88 to allow hydraulic oil to flow. In this embodiment, the hydraulic system 8 of the rescue vehicle connects the piston rod of the first lifting cylinder 83 to the working oil circuit of the first tilting cylinder 86, which reduces the number of oil circuits, reduces space occupation, and results in a compact structure. Furthermore, by providing a first bidirectional hydraulic lock 85, when the first lifting cylinder 83 drives the tilting door 222 to rise or fall, the tilting door 222 can be stopped at any position and maintained in that state, facilitating different heights of the tilting door 222 and enabling workers to operate it.

[0110] Optionally, in some embodiments, as shown in the figure, the hydraulic system 8 of the rescue vehicle further includes a second lifting cylinder 810. The hydraulic oil tank 81 is connected to the second lifting cylinder 810 via an oil pipe. The second lifting cylinder 810 is connected in parallel with the first lifting cylinder 83. The second lifting cylinder 810 is used to drive the tilting door 222 of the rescue vehicle to move up and down. The second lifting cylinder 810 works in conjunction with the first lifting cylinder 83, making operation simple and saving time and effort.

[0111] The second bidirectional hydraulic lock 811 is disposed in the oil line between the first solenoid valve 84 and the second lifting cylinder 810.

[0112] The second tilting cylinder 812 is connected to the hydraulic oil tank 81 via an oil pipe. The second tilting cylinder 812 is connected in parallel with the first tilting cylinder 86. The second tilting cylinder 812 is used to drive the downward tilting door 222 of the rescue vehicle to tilt up and down. The second tilting cylinder 812 works in conjunction with the first tilting cylinder 86 to open or close the upward tilting door 221. The operation is simple, time-saving and labor-saving.

[0113] The second bidirectional balance valve 813 is disposed in the oil circuit between the second solenoid valve 87 and the second tilting cylinder 812. The second solenoid valve 87 is connected to the rodless chamber of the second lifting cylinder 810 via an oil circuit. The piston rod of the second lifting cylinder 810 has a hollow structure, which can serve as an oil circuit, reducing the oil circuit layout, reducing space occupation, and resulting in a compact structure. The rodless chamber of the second lifting cylinder 810 is connected to one end of the piston rod of the second lifting cylinder 810, and the other end of the piston rod of the second lifting cylinder 810 is connected to the second bidirectional balance valve 813 via an oil pipe. In other embodiments, the second bidirectional balance valve 813 can also be replaced by a bidirectional hydraulic lock.

[0114] And a fourth solenoid valve 814, which is disposed on the oil pipe between the other end of the piston rod of the second lifting cylinder 810 and the second bidirectional balance valve 813. The fourth solenoid valve 814 is used to open and close the oil circuit. In this embodiment, the hydraulic system 8 of the rescue vehicle connects the piston rod of the first lifting cylinder 83 to the working oil circuit of the first tilting cylinder 86, and connects the piston rod of the second lifting cylinder 810 to the working oil circuit of the second tilting cylinder 812. This reduces the number of oil circuits, reduces the space occupied, and makes the structure compact. Furthermore, by providing a first bidirectional hydraulic lock 85 and a second bidirectional hydraulic lock 811, when the first lifting cylinder 83 and the second lifting cylinder 810 drive the tilting door 222 to rise and fall, the tilting door 222 can be stopped at any position and maintained in that state, which is convenient for the tilting door 222 to be at different heights and for the workers to operate.

[0115] Optionally, in some embodiments, such as Figures 1 to 5As shown, the hydraulic system 8 of the rescue vehicle also includes an overflow valve 816 and an overflow pipe 815. One end of the overflow pipe 815 is connected to the hydraulic oil tank 81, and the other end of the overflow pipe 815 is connected to the first solenoid valve 84 and / or the second solenoid valve 87. The overflow valve 816 is disposed on the overflow pipe 815. When the pressure of the hydraulic system 8 is lower than the set value, the spring force of the overflow valve 816 keeps the valve core in the closed position. When the pressure of the hydraulic system 8 rises and exceeds the set value, the hydraulic oil pressure overcomes the spring force, pushing the valve core to open, and the excess hydraulic oil is discharged back to the oil tank through the overflow port, and the system pressure gradually decreases.

[0116] Specifically, in this embodiment, such as Figure 1 As shown, when the emergency vehicle's tilt-down door 222 needs to be lowered, the hydraulic pump 82 is activated. The left side of the first solenoid valve 84 is energized, while the second solenoid valve 87 and the third solenoid valve 89 are de-energized. Hydraulic oil flows from the left side of the first solenoid valve 84 to the first two-way hydraulic lock 85 and the second two-way hydraulic lock 811. High-pressure hydraulic oil flows from the left side of the first two-way hydraulic lock 85 into the rodless chamber of the first lifting cylinder 83, and simultaneously, high-pressure hydraulic oil flows from the left side of the second two-way hydraulic lock 811 into the rodless chamber of the second lifting cylinder 810. This pushes the piston rods of the first lifting cylinder 83 and the second lifting cylinder 810 outwards, thereby driving the tilt-down door 222 to lower. The high-pressure hydraulic oil flowing from the left side of the first two-way hydraulic lock 85 will open the right-side check valve of the first two-way hydraulic lock 85 to allow hydraulic oil to flow. The high-pressure hydraulic oil flowing from the left side of the second two-way hydraulic lock 811 will open the right-side check valve of the second two-way hydraulic lock 811 to allow hydraulic oil to flow.

[0117] Specifically, in this embodiment, such as Figure 2 As shown, when it is necessary to drive the tilting door 222 of the rescue vehicle to rise, the hydraulic oil pump 82 is started, the right side of the first solenoid valve 84 is energized, and the second solenoid valve 87 and the third solenoid valve 89 are de-energized. The hydraulic oil flows from the right side of the first solenoid valve 84 to the first bidirectional hydraulic lock 85 and the second bidirectional hydraulic lock 811. The high-pressure hydraulic oil flows from the right side of the first bidirectional hydraulic lock 85 into the rod chamber of the first lifting cylinder 83, and at the same time, the high-pressure hydraulic oil flows from the right side of the second bidirectional hydraulic lock 811 into the rod chamber of the second lifting cylinder 810, thereby driving the piston rod of the first lifting cylinder 83 and the piston rod of the second lifting cylinder 810 to retract, so as to drive the tilting door 222 to rise.

[0118] Specifically, in this embodiment, such as Figure 3As shown, the emergency vehicle's tilting door 222 is then tilted outwards to open it. At this time, the left side of the second solenoid valve 87 is energized, as are the third solenoid valve 89 and the fourth solenoid valve 814, while the first solenoid valve 84 is de-energized. Hydraulic oil flows from the left side of the second solenoid valve 87 into the rodless chamber of the first lifting cylinder 83. Since the piston rod of the first lifting cylinder 83 is hollow, it can serve as an oil circuit, reducing the oil circuit layout and space occupation, resulting in a compact structure. With the third solenoid valve 89 energized, hydraulic oil flows from the other end of the piston rod of the first lifting cylinder 83 into the left side of the first two-way balance valve 88 and the left side of the second two-way balance valve 813. High-pressure hydraulic oil flows from the left side of the first two-way balance valve 88 into the rodless chamber of the first tilting cylinder 86, and high-pressure hydraulic oil flows from the left side of the second two-way balance valve 813 into the rodless chamber of the second tilting cylinder 812, thereby pushing the first tilting cylinder... The piston rods of the rotating cylinder 86 and the second tilting cylinder 812 are pushed out to drive the tilting door 222 to tilt outward and open. Then, hydraulic oil flows from the rod chamber of the first tilting cylinder 86 into the right side of the first two-way balance valve 88, and hydraulic oil flows from the rod chamber of the second tilting cylinder 812 into the right side of the second two-way balance valve 813. Since the fourth solenoid valve 814 is energized, hydraulic oil flows from the right side of the first two-way balance valve 88 and the right side of the second two-way balance valve 813 into the other end of the piston rod of the second lifting cylinder 810, and finally flows back to the hydraulic oil tank 81 from the rodless chamber of the second lifting cylinder 810. In this embodiment, the hydraulic system 8 of the rescue vehicle connects the piston rods of the first lifting cylinder 83 and the second lifting cylinder 810 as oil circuits with the working oil circuits of the first tilting cylinder 86 and the second tilting cylinder 812, which can reduce the oil circuit layout, reduce the space occupied, and make the structure compact.

[0119] Specifically, in this embodiment, such as Figure 4As shown, when the emergency vehicle's tilting door 222 tilts inward to close it, the right side of the second solenoid valve 87 is energized, as are the third solenoid valve 89 and the fourth solenoid valve 814. The first solenoid valve 84 is de-energized. Hydraulic oil flows from the right side of the second solenoid valve 87 into the rodless chamber of the second lifting cylinder 810. Since the piston rod of the second lifting cylinder 810 has a hollow structure, it can serve as an oil circuit, reducing the oil circuit layout and space occupation, resulting in a compact structure. Furthermore, with the fourth solenoid valve 814 energized, hydraulic oil flows from the other end of the piston rod of the second lifting cylinder 810 into the right side of the first two-way balance valve 88 and the right side of the second two-way balance valve 813. High-pressure hydraulic oil flows from the right side of the first two-way balance valve 88 into the rod chamber of the first tilting cylinder 86, and high-pressure hydraulic oil flows from the right side of the second two-way balance valve 813 into the rod chamber of the second tilting cylinder 812, thereby pushing... The piston rods of the first tilting cylinder 86 and the second tilting cylinder 812 retract to drive the tilting door 222 to tilt inward and close. Then, hydraulic oil flows from the rodless chamber of the first tilting cylinder 86 into the left side of the first two-way balance valve 88, and hydraulic oil flows from the rodless chamber of the second tilting cylinder 812 into the left side of the second two-way balance valve 813. Since the third solenoid valve 89 is energized, hydraulic oil flows from the left side of the first two-way balance valve 88 and the left side of the second two-way balance valve 813 into the other end of the piston rod of the first lifting cylinder 83, and finally flows back to the hydraulic oil tank 81 from the rodless chamber of the first lifting cylinder 83. In this embodiment, the hydraulic system 8 of the rescue vehicle connects the piston rods of the first lifting cylinder 83 and the second lifting cylinder 810 as oil circuits with the working oil circuits of the first tilting cylinder 86 and the second tilting cylinder 812, which can reduce the oil circuit layout, reduce the space occupied, and make the structure compact.

[0120] Please see Figures 1 to 9 This embodiment also relates to a rescue vehicle, which is mainly used for long-distance water supply in emergency rescue operations. The rescue vehicle includes:

[0121] The frame structure 1 serves as the frame structure of the entire vehicle. It is the base of the vehicle and plays a role in supporting and connecting the various assemblies of the vehicle, keeping the assemblies in a relatively correct position, and bearing various loads inside and outside the vehicle.

[0122] Carriage 2, which is mounted on the frame mechanism;

[0123] Control system 4 is used to control the operation of the emergency vehicle; wherein control system 4 is a PLC controller.

[0124] And the hydraulic system 8 of the rescue vehicle, such as Figure 5As shown, the first solenoid valve 84, the second solenoid valve 87, the third solenoid valve 89, and the fourth solenoid valve 814 of the hydraulic system 8 are electrically connected to the control system 4, and the control system 4 controls the opening or closing of the first solenoid valve 84, the second solenoid valve 87, the third solenoid valve 89, and the fourth solenoid valve 814.

[0125] Optionally, in some embodiments, such as Figures 6 to 9 As shown, the carriage includes:

[0126] The compartment 21 is used to house water supply hoses and emergency equipment.

[0127] A door 22 is provided on one side of the compartment 21, and the door 22 is hinged to the compartment 21; preferably, in this embodiment, as... Figures 6 to 9 As shown, the compartment door 22 is located at the rear of the compartment body 21 to facilitate pipe placement and retrieval operations.

[0128] The lifting mechanism 3 is located inside the compartment 21. The compartment door 22 is movably connected to the lifting mechanism 3. The lifting mechanism 3 is used to drive the compartment door 22 to rise or fall. It is easy to operate and saves time and effort.

[0129] The system includes a tilting cylinder 5, one end of which is connected to the lifting mechanism 3, and the other end of which is connected to the door 22. The tilting cylinder 5 is used to tilt the door 22 to open or close it. The lifting mechanism 3 drives the door 22 to descend, lowering the height between the door 22 and the ground. Then, the tilting cylinder 5 tilts the door 22 outward, opening it. This lowers the height of the door 22 and the ground, while also serving as a platform for personnel to easily get on and off the vehicle. Lowering the door 22 also prevents the water supply hoses inside the vehicle body 21 from being fully pulled out, allowing for better hose deployment by the emergency vehicle. Specifically, in this embodiment, there are two tilting cylinders 5, each positioned on one side of the width of the vehicle body 21.

[0130] Specifically, in the emergency vehicle's cargo compartment 2 of this embodiment, during operation, the lifting mechanism 3 first drives the cargo door 22 to descend, reducing the height between the cargo door 22 and the ground. Then, the tilting cylinder 5 tilts the cargo door 22 outward, opening it outward. At this time, in addition to reducing the height between the cargo door 22 and the ground, the cargo door 22 can also be used as a carrying platform, allowing workers to use it as a step to get on and off the cargo compartment 2, making it convenient for workers to get on and off the cargo compartment 2. Furthermore, with the lifting mechanism 3, the vertical position and opening and closing position of the cargo door 22 can also be adjusted when laying water supply hoses, preventing the water supply hoses inside the cargo compartment 21 from being completely pulled out, so that the emergency vehicle can lay hoses more effectively.

[0131] Optionally, in some embodiments, such as Figures 6 to 9 As shown, the compartment door 22 includes an upward-opening door 221 and a downward-opening door 222. The upward-opening door 221 and the downward-opening door 222 are arranged opposite each other along the height direction of the compartment body 21. The upward-opening door 221 is located above the downward-opening door 222. The upward-opening door 221 is hinged to the top of the compartment body 21. The upward-opening door 221 is used to open upwards, that is, the upward-opening door 221 and the downward-opening door 222 open vertically, which facilitates operation. The downward-opening door 222 is movably connected to the lifting mechanism 3, and the downward-opening door 222 is used to open downwards. During operation, the lifting mechanism 3 first drives the tilting door 222 to descend, reducing the height between the tilting door 222 and the ground. Then, the tilting cylinder 5 flips the tilting door 222 outward, opening the compartment door 22. At this time, the height between the tilting door 222 and the ground is reduced, and the tilting door 222 can also be used as a carrying platform for workers to use as a step to get on and off the compartment 2, making it convenient for workers to get on and off the compartment 2. With the lifting mechanism 3, the vertical position and opening and closing position of the tilting door 222 can also be adjusted when laying water supply hoses to prevent the water supply hoses inside the compartment 21 from being completely pulled out, so that the rescue vehicle can lay the hoses better.

[0132] Optionally, in some embodiments, such as Figures 6 to 9 As shown, the cargo compartment 2 of the rescue vehicle also includes a tilting mechanism 6. One end of the tilting mechanism 6 is connected to the compartment 21, and the other end is connected to the tilting door 221. The tilting mechanism 6 is used to flip the tilting door 221 to open or close it. Opening the tilting door 221 by tilting it upwards via the tilting mechanism 6 is simple and time-saving. Specifically, in this embodiment, the tilting mechanism 6 is a tilting hydraulic cylinder, and there are two tilting mechanisms 6, which are respectively arranged on both sides of the compartment 21 in the width direction.

[0133] Optionally, in some embodiments, such as Figures 6 to 9As shown, there are two lifting mechanisms 3, which are respectively located inside the compartment 21 on both sides of the compartment 21 in the width direction; there are two tilting cylinders 5, one end of which is connected to one of the two lifting mechanisms 3 respectively. The presence of two lifting mechanisms 3 and two tilting cylinders 5 improves operational stability. Specifically, there are two lifting mechanisms 3, corresponding to the second tilting cylinder 810, and two tilting cylinders 5, corresponding to the first tilting cylinder 86 and the second tilting cylinder 812.

[0134] Optionally, in some embodiments, such as Figures 6 to 9 As shown, the lifting mechanism 3 includes a lifting cylinder 31 and a lifting connecting component 32; one end of the lifting cylinder 31 is connected to the compartment 21, and the other end of the lifting cylinder 31 is connected to one end of the lifting connecting component 32; the downward-opening door 222 is connected to the other end of the lifting connecting component 32; one end of the tilting cylinder 5 is connected to the lifting connecting component 32. The lifting cylinder 31 drives the lifting connecting component 32, the tilting cylinder 5, and the downward-opening door 222 to move up and down. Specifically, during operation, the lifting cylinder 31 first drives the lifting connecting component 32, the tilting cylinder 5, and the tilting door 222 to descend, lowering the height between the tilting door 222 and the ground. Then, the tilting cylinder 5 tilts the tilting door 222 outward, opening the compartment door 22. At this point, the height between the tilting door 222 and the ground is lowered, and the tilting door 222 can also be used as a support platform for workers to use as a step for getting on and off the compartment 2, facilitating worker access. Furthermore, with the lifting mechanism 3, the vertical position and opening / closing position of the tilting door 222 can be adjusted during the laying of water supply hoses, preventing the water supply hoses inside the compartment 21 from being completely pulled out, allowing for better hose laying by the rescue vehicle. In this embodiment, the lifting connecting component 32 is a lifting linkage.

[0135] Optionally, in some embodiments, such as Figures 6 to 9 As shown, the lifting mechanism 3 also includes a sliding component 33. The connecting component is slidably connected to the inner wall of the compartment 21 through the sliding component 33. The sliding component 33 is provided to improve the stability and continuity of the sliding of the lifting connecting component 32.

[0136] Optionally, in some embodiments, such as Figures 6 to 9 As shown, the sliding component 33 includes a sliding groove 331 and a pulley 332. The sliding groove 331 is disposed on the inner wall of the compartment 21, and the pulley 332 is disposed on the connecting component. The pulley 332 and the sliding groove 331 cooperate with each other for sliding, so as to improve the stability and continuity of the sliding of the lifting connecting component 32.

[0137] Optionally, in some embodiments, such as Figure 9 As shown, the cargo compartment 2 of the rescue vehicle also includes a rolling component 7, which is disposed on the inner wall of the top of the folding door 222. The rolling component 7 reduces the friction between the hose and the folding door 222 during hose laying, thus facilitating hose laying. The rolling component 7 is a guide roller or a rolling shaft.

[0138] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A hydraulic system for a rescue vehicle, characterized in that include: Hydraulic oil tank; A hydraulic oil pump, wherein the hydraulic oil pump is connected to the hydraulic oil tank via an oil pipe; The first lifting cylinder is connected to the hydraulic oil tank via an oil pipe. The first lifting cylinder is used to drive the tilting door of the rescue vehicle to lift up and down. A first solenoid valve is disposed on the oil line between the hydraulic oil tank and the first lifting cylinder. The first bidirectional hydraulic lock is disposed on the oil line between the first solenoid valve and the first lifting cylinder; The first tilting cylinder is connected to the hydraulic oil tank via an oil pipe. The first tilting cylinder is used to drive the tilting door of the rescue vehicle to tilt up and down. The second solenoid valve is disposed in the oil line between the hydraulic oil tank and the first tilting cylinder; The first bidirectional balance valve is disposed on the oil line between the second solenoid valve and the first tilting cylinder. The second solenoid valve is connected to the rodless chamber of the first lifting cylinder through an oil line. The piston rod of the first lifting cylinder has a hollow structure. The rodless chamber of the first lifting cylinder is connected to one end of the piston rod of the first lifting cylinder. The other end of the piston rod of the first lifting cylinder is connected to the first bidirectional balance valve through an oil pipe. And a third solenoid valve, which is located on the oil pipe between the other end of the piston rod of the first lifting cylinder and the first bidirectional balance valve.

2. The hydraulic system of the rescue vehicle according to claim 1, characterized in that: The hydraulic system of the rescue vehicle also includes a second lifting cylinder. The hydraulic oil tank is connected to the second lifting cylinder through an oil pipe. The second lifting cylinder is connected in parallel with the first lifting cylinder. The second lifting cylinder is used to drive the lowering door of the rescue vehicle to move up and down. The second bidirectional hydraulic lock is disposed in the oil line between the first solenoid valve and the second lifting cylinder; The second tilting cylinder is connected to the hydraulic tank via an oil pipe. The second tilting cylinder is connected in parallel with the first tilting cylinder. The second tilting cylinder is used to drive the tilting door of the rescue vehicle to tilt up and down. The second bidirectional balance valve is located in the oil circuit between the second solenoid valve and the second tilting cylinder. The second solenoid valve is connected to the rodless chamber of the second lifting cylinder through an oil circuit. The piston rod of the second lifting cylinder has a hollow structure. The rodless chamber of the second lifting cylinder is connected to one end of the piston rod of the second lifting cylinder. The other end of the piston rod of the second lifting cylinder is connected to the second bidirectional balance valve through an oil pipe. And a fourth solenoid valve, which is located on the oil pipe between the other end of the piston rod of the second lifting cylinder and the second bidirectional balance valve.

3. The hydraulic system of the rescue vehicle according to claim 1 or 2, characterized in that: The hydraulic system of the rescue vehicle also includes an overflow valve and an overflow pipeline. One end of the overflow pipeline is connected to the hydraulic oil tank, and the other end of the overflow pipeline is connected to the first solenoid valve and / or the second solenoid valve. The overflow valve is located on the overflow pipeline.

4. A rescue vehicle, characterized in that, include: Chassis mechanism; The carriage is mounted on the frame mechanism; A control system for controlling the operation of the emergency rescue vehicle; And the hydraulic system of the rescue vehicle as described in any one of claims 1 to 3 above, wherein the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve of the hydraulic system are electrically connected to the control system.

5. The emergency rescue vehicle according to claim 4, characterized in that, The carriage includes: Box body, A compartment door is located on one side of the compartment body and is hinged to the compartment body; A lifting mechanism is provided inside the compartment, and the compartment door is movably connected to the lifting mechanism. The lifting mechanism is used to drive the compartment door to rise or fall. And a tilting cylinder, one end of which is connected to the lifting mechanism and the other end of which is connected to the door. The tilting cylinder is used to tilt the door to open or close it.

6. The emergency rescue vehicle according to claim 5, characterized in that: The compartment door includes an upward-opening door and a downward-opening door; The upward-opening door and the downward-opening door are arranged opposite each other along the height direction of the compartment. The upward-opening door is located above the downward-opening door. The upward-opening door is hinged to the top of the compartment and is used to open upward. The downward-opening door is movably connected to the lifting mechanism, and the downward-opening door is used to open downwards.

7. The emergency rescue vehicle according to claim 6, characterized in that: The rescue vehicle also includes a tilting mechanism, one end of which is connected to the body of the vehicle and the other end of which is connected to the tilting door. The tilting mechanism is used to flip the tilting door to open or close it.

8. The emergency rescue vehicle according to claim 6 or 7, characterized in that: There are two lifting mechanisms, which are respectively located inside the compartment on both sides of the width direction of the compartment. There are two tilting cylinders, and one end of each tilting cylinder is connected to one of the two lifting mechanisms respectively.

9. The emergency rescue vehicle according to claim 8, characterized in that: The lifting mechanism includes a lifting cylinder and a lifting connection component; One end of the lifting cylinder is connected to the box body, the other end of the lifting cylinder is connected to one end of the lifting connecting component, and the downward-opening door is connected to the other end of the lifting connecting component; One end of the tilting cylinder is connected to the lifting connecting component.

10. The emergency rescue vehicle according to claim 9, characterized in that: The lifting mechanism also includes a sliding component, and the connecting component is slidably connected to the inner wall of the compartment through the sliding component.

11. The emergency rescue vehicle according to claim 10, characterized in that: The sliding assembly includes a sliding groove and a pulley. The sliding groove is disposed on the inner wall of the compartment, and the pulley is disposed on the connecting component. The pulley and the sliding groove cooperate with each other for sliding.

12. The emergency rescue vehicle according to claim 5, characterized in that: The rescue vehicle also includes a rolling component, which is disposed on the inner wall of the downward-opening door.

Images