Foot pump station, method of manufacturing and fire truck

Abstract

The present application relates to a kind of foot pump station and its manufacturing method and fire engine, wherein, foot pump station includes valve body (1), valve assembly, suction pump (2) and foot pedal assembly, valve body (1) is made using additive manufacturing technology, the inside of valve body (1) is provided with flow passage;Valve assembly is installed on valve body (1), and it is communicated with the flow passage in the inside of valve body (1);Suction pump (2) is installed on valve body (1), and it is communicated with the flow passage in the inside of valve body (1);Foot pedal assembly is connected with valve body (1), and it is configured to control the suction and discharge oil action of suction pump (2).Fire engine includes the above-mentioned foot pump station.The manufacturing method of foot pump station includes using additive manufacturing technology to manufacture the valve body (1) of foot pump station.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of additive manufacturing, and in particular to a pedal pump station, a manufacturing method thereof and a fire truck. BACKGROUND

[0002] In recent years, high-rise building fires have occurred frequently, and aerial fire trucks play a crucial role in fire extinguishing and personnel rescue work in such incidents, so the functional reliability of the fire truck must be ensured. The manned platform of the aerial fire truck retains the function of manual leveling by a pedal valve in emergency situations to prevent the out-of-control of the electric leveling device in special situations, but due to the traditional processing and manufacturing method, the valve body is heavy and bulky, occupies a large working space during use and is easy to interfere with other objects, thereby resulting in that more rescue tools cannot be arranged on the manned platform, and further affecting the manned platform to increase other auxiliary rescue functions.

[0003] It should be noted that the information disclosed in the background section of the present application is only intended to increase the understanding of the overall background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. SUMMARY

[0004] The present application provides a pedal pump station, a manufacturing method thereof and a fire truck.

[0005] According to one aspect of the present application, a pedal pump station is provided, comprising:

[0006] a valve body made of additive manufacturing technology, the valve body having a flow passage inside;

[0007] a valve assembly installed on the valve body and communicating with the flow passage inside the valve body;

[0008] a suction pump installed on the valve body and communicating with the flow passage inside the valve body; and

[0009] a pedal assembly connected to the valve body and configured to control the suction and discharge actions of the suction pump.

[0010] In some embodiments, the pedal assembly includes a first connecting portion, a second connecting portion and a pedal portion, one end of the first connecting portion is connected to the suction pump, the other end of the first connecting portion is rotatably connected to the pedal portion, the second connecting portion is arranged between the pedal portion and the input shaft of the suction pump, so that the rotation of the pedal portion relative to the first connecting portion is realized by stepping on the pedal portion, thereby realizing the pressing of the second connecting portion, and further realizing the pressing of the input shaft of the suction pump.

[0011] In some embodiments, the second connecting part comprises a connecting column and a spring, two ends of the connecting column are connected with the foot pedal part and the input shaft of the suction pump respectively, and the spring is sleeved on the outer periphery of the input shaft of the suction pump and the connecting column.

[0012] In some embodiments, a middle part of the connecting column is provided with a flange part, the suction pump comprises a pump body and an input shaft inserted into the pump body, and the spring is arranged between the flange part and the pump body, and the distance between the flange part and the pump body is equal to the free length of the spring in the state that the input shaft of the suction pump is not pressed.

[0013] In some embodiments, two ends of the connecting column are respectively provided with a first connecting hole and a second connecting hole for connecting with the foot pedal part and the input shaft of the suction pump, and the first connecting hole and the second connecting hole are separated by a preset distance to avoid interference between the foot pedal part and the valve body during rotation relative to the first connecting part.

[0014] In some embodiments, the first connecting part comprises a first connecting piece and a second connecting piece, the second connecting piece is connected between the first connecting piece and the foot pedal part, and the first connecting piece is annular and rotatably sleeved on the outer periphery of the suction pump, so that the first connecting part is rotatable relative to the suction pump, and the foot pedal part is rotatable relative to the valve body.

[0015] In some embodiments, the foot pedal part comprises a first connecting rod and a second connecting rod, the first connecting rod is connected with the first connecting part, and the second connecting rod is rotatably connected with the first connecting rod to enable the second connecting rod to be folded relative to the first connecting rod.

[0016] In some embodiments, the first connecting rod and the second connecting rod are both bent rods, an end of the second connecting rod away from the first connecting rod is bent towards a first direction, the first direction is opposite to the direction of stepping on the foot pedal part, and the bending angle of the second connecting rod is an obtuse angle.

[0017] In some embodiments, the foot pedal part further comprises a pedal arranged at the end of the second connecting rod, and the pedal is arranged away from the center line of the second connecting rod.

[0018] In some embodiments, the bends of the flow channels in the interior of the valve body are all transitioned by circular arcs.

[0019] In some embodiments, the valve body comprises adjacent first, second and third side surfaces, the suction pump is mounted on the first side surface, the foot pedal assembly is connected with the first side surface, the second side surface is provided with an oil outlet, a first oil inlet and a second oil inlet for connecting with an oil inlet channel, and the oil outlet is in communication with the first oil inlet and the second oil inlet through the flow channels in the interior of the valve body.

[0020] The valve assembly comprises:

[0021] A reversing valve is installed on the second side surface to control the oil inlet path to supply oil to the first oil inlet or the second oil inlet.

[0022] A check valve is installed on the second side surface to prevent the hydraulic oil output from the valve body from flowing back.

[0023] A pressure measuring valve is installed on the second side surface to monitor the pressure of the hydraulic oil output from the valve body; and

[0024] An overflow valve is installed on the third side surface to maintain the stability of the pressure inside the valve body.

[0025] According to another aspect of the present application, a fire truck is provided, comprising the foot pump station described above.

[0026] According to still another aspect of the present application, a foot pump station manufacturing method is provided, comprising: manufacturing the valve body of the foot pump station by using an additive manufacturing technology.

[0027] In some embodiments, the operation of manufacturing the valve body of the foot pump station by using an additive manufacturing technology comprises: designing the valve body by using a topology optimization method.

[0028] Based on the above technical solutions, the foot pump station is split into a valve body, a valve assembly, a suction pump and a foot pedal assembly, which helps to realize the customized layout of the functional areas of the foot pump station, facilitates the disassembly and assembly of the various components of the foot pump station, and is also convenient for later maintenance. In addition, the valve body of the foot pump station is manufactured by using an additive manufacturing technology, which helps to freely design the structure of the valve body to meet different customized needs, and by arranging flow channels inside the valve body, the external space of the valve body can be effectively saved, the overall volume of the foot pump station is reduced, and the convenience of the foot pump station when installed on a corresponding work vehicle is increased. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application. In the drawings:

[0030] Figure 1 A front view of an embodiment of the foot pump station of the present application is shown;

[0031] Figure 2 A right view of the foot pump station is shown; Figure 1

[0032] Figure 3 A structure diagram of the second side surface of the valve body in an embodiment of the foot pump station of the present application is shown;

[0033] Figure 4 ​Fig. 1 shows a structural schematic diagram of the suction pump and the pedal assembly in one embodiment of the foot-pedal pump station of the present application;

[0034] Figure 5 Fig. 2 shows a structural schematic diagram of the connecting column in one embodiment of the foot-pedal pump station of the present application;

[0035] Figure 6 Fig. 3 shows a structural schematic diagram of the first connecting rod and the second connecting rod in one embodiment of the foot-pedal pump station of the present application;

[0036] Figure 7 Fig. 4 shows a structural schematic diagram of the first connecting rod and the second connecting rod in one embodiment of the foot-pedal pump station of the present application after folding;

[0037] Figure 8 Fig. 5 shows a schematic diagram of the installation position of the foot-pedal pump station in one embodiment of the fire truck of the present application.

[0038] Fig. 1 shows a structural schematic diagram of the suction pump and the pedal assembly in one embodiment of the foot-pedal pump station of the present application;

[0039] 1, valve body; 11, oil outlet; 12, first oil inlet; 13, second oil inlet; 2, suction pump; 3, first connecting part; 31, first connecting piece; 32, second connecting piece; 4, second connecting part; 41, connecting column; 411, flange part; 412, first connecting hole; 413, second connecting hole; 42, spring; 5, pedal part; 51, first connecting rod; 52, second connecting rod; 53, pedal; 6, reversing valve; 7, check valve; 8, pressure measuring valve; 9, overflow valve. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, 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 device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0042] Reference Figure 1As shown, in some embodiments of the foot pedal pump station provided by the application, the foot pedal pump station comprises a valve body 1, a valve assembly, a suction pump 2 and a foot pedal assembly, wherein the valve body 1 is made of additive manufacturing technology, and the valve body 1 is internally provided with a flow channel; the valve assembly is installed on the valve body 1 and communicates with the flow channel in the interior of the valve body 1; the suction pump 2 is installed on the valve body 1 and communicates with the flow channel in the interior of the valve body 1; the foot pedal assembly is connected with the valve body 1 and is configured to control the suction and discharge actions of the suction pump 2.

[0043] The application splits the foot pedal pump station into the valve body 1, the valve assembly, the suction pump 2 and the foot pedal assembly, which helps to realize the customized layout of the functional areas of the foot pedal pump station. Referring to Figure 2 、 Figure 3 and Figure 4 , Figure 2 as shown, the structural diagram of the valve body 1, the valve assembly, the suction pump 2 and the foot pedal assembly assembled together, Figure 3 as shown, the structural diagram of the foot pedal pump station after the foot pedal assembly is disassembled, and Figure 4 as shown, the structural diagram of the foot pedal assembly, it can be seen that the structures of the above-mentioned various functional areas are not interfered with each other, and can be individually assembled and disassembled, thereby facilitating the maintenance or replacement of each component during the use of the foot pedal pump station.

[0044] In addition, the valve body 1 of the foot pedal pump station is manufactured by additive manufacturing technology. Based on the characteristics of high manufacturing freedom, breaking away from the manufacturing constraints of traditional processing methods and supporting innovative structural design of parts, the structure of the valve body 1 can be designed with high freedom in the manufacturing of the valve body 1 to meet different customized needs. By providing a flow channel in the interior of the valve body 1, the external space of the valve body 1 can be effectively saved, the overall volume of the foot pedal pump station is reduced, and the convenience of the foot pedal pump station when installed on the corresponding working vehicle is increased. For example, the foot pedal pump station of the application is installed on the personnel platform of the ladder fire truck, which helps to provide space for the arrangement of other rescue tools on the personnel platform of the fire truck, and is beneficial to improve the efficiency of fire rescue work.

[0045] As shown in Figure 1 , in some embodiments, the foot pedal assembly comprises a first connecting part 3, a second connecting part 4 and a foot pedal part 5, one end of the first connecting part 3 is connected with the suction pump 2, the other end of the first connecting part 3 is rotatably connected with the foot pedal part 5, and the second connecting part 4 is arranged between the foot pedal part 5 and the input shaft of the suction pump 2, so that the rotation of the foot pedal part 5 relative to the first connecting part 3 is realized by pedaling the foot pedal part 5, thereby realizing the pressing of the second connecting part 4, and further realizing the pressing of the input shaft of the suction pump 2.

[0046] The connection relationship among the suction pump 2, the first connecting part 3, the second connecting part 4 and the foot pedal part 5 can realize the pressing of the input shaft of the suction pump 2 by treading the foot pedal part 5, and then the control of the hydraulic oil flow in the flow passage inside the valve body 1 according to the operation requirement of the foot pedal pump station, and the position and connection direction of the first connecting part 3, the second connecting part 4 and the foot pedal part 5 can be set according to the actual application environment, so as to facilitate the control of the suction and discharge of the suction pump 2 and improve the convenience.

[0047] Referring to Figure 1 and Figure 4 As shown in the figure, in some embodiments, the second connecting part 4 comprises a connecting column 41 and a spring 42, both ends of the connecting column 41 are connected with the foot pedal part 5 and the input shaft of the suction pump 2 respectively, and the spring 42 is sleeved on the outer periphery of the input shaft of the suction pump 2 and the connecting column 41.

[0048] By setting the spring 42, the foot pedal part 5 can rebound quickly after being treaded, so as to continue to perform subsequent actions, thereby ensuring the response speed of the action of the foot pedal pump station.

[0049] Referring to Figure 4 and Figure 5 As shown in the figure, in some embodiments, the middle part of the connecting column 41 is provided with a flange part 411, the suction pump 2 comprises a pump body and an input shaft inserted into the pump body, and the spring 42 is arranged between the flange part 411 and the pump body, and the distance between the flange part 411 and the pump body is equal to the free length of the spring 42 in the state that the input shaft of the suction pump 2 is not pressed.

[0050] By setting the flange part 411 in the middle part of the connecting column 41 and arranging the spring 42 between the flange part 411 and the pump body, that is, by providing support for both ends of the spring 42 through the flange part 411 and the pump body, the position deviation of the spring 42 in the pressed state can be prevented, thereby ensuring the working stability and reliability of the foot pedal pump station.

[0051] And by setting the distance between the flange part 411 and the pump body to be equal to the free length of the spring 42, on the one hand, the foot pedal assembly can be easily installed, and on the other hand, the resistance received during the treading of the foot pedal part 5 is progressive resistance, and there is no idle stroke in the treading action, thereby ensuring the use efficiency of the foot pedal assembly.

[0052] Referring to Figure 5 As shown in the figure, in some embodiments, both ends of the connecting column 41 are respectively provided with a first connecting hole 412 and a second connecting hole 413 for connecting with the foot pedal part 5 and the input shaft of the suction pump 2, and the first connecting hole 412 is separated from the second connecting hole 413 by a preset distance, so as to avoid the interference between the foot pedal part 5 and the valve body 1 during the rotation of the foot pedal part 5 relative to the first connecting part 3.

[0053] In the above embodiments, the connection mode of the two ends of the connecting column 41 with the pedal part 5 and the suction pump 2 can be various, for example, the connecting column 41 can be connected with the pedal part 5 through the first connecting hole 412 matched with the pin, and the connecting column 41 can be connected with the suction pump 2 through the second connecting hole matched with the screw. The preset distance between the first connecting hole 412 and the second connecting hole 413 can be set according to actual needs, as long as the pedal part 5 does not interfere with the valve body 1 after being stepped, that is, the pedal part 5 has a long enough stroke, so as to ensure that the pedal pump station has a large enough load capacity.

[0054] Reference Figure 1 and Figure 4 As shown in FIGS. 1 and 2, in some embodiments, the first connecting part 3 includes a first connecting piece 31 and a second connecting piece 32, the second connecting piece 32 is connected between the first connecting piece 31 and the pedal part 5, and the first connecting piece 31 is annular and rotatably sleeved on the outer periphery of the suction pump 2, so that the first connecting part 3 is rotatable relative to the suction pump 2, and the pedal part 5 is rotatable relative to the valve body 1.

[0055] By arranging the annular first connecting piece 31 rotatable relative to the suction pump 2, the rotation of the pedal part 5 relative to the valve body 1 can be realized, so as to facilitate the multi-directional control of the pedal pump station and improve the use convenience of the pedal pump station.

[0056] Reference Figure 1 and Figure 4 As shown in FIGS. 1 and 2, in some embodiments, the pedal part 5 includes a first connecting rod 51 and a second connecting rod 52, the first connecting rod 51 is connected with the first connecting part 3, and the second connecting rod 52 is rotatably connected with the first connecting rod 51 to enable the second connecting rod 52 to be folded relative to the first connecting rod 51.

[0057] The unfolded and folded states of the pedal part 5 are specifically shown in FIGS. 1 and 2, and it can be seen that by folding the second connecting rod 52 relative to the first connecting rod 51, the storage volume of the pedal part 5 in the idle state can be effectively reduced, and the storage volume of the pedal pump station is also reduced. Figure 6 Figure 7 The unfolded and folded states of the pedal part 5 are specifically shown in FIGS. 1 and 2, and it can be seen that by folding the second connecting rod 52 relative to the first connecting rod 51, the storage volume of the pedal part 5 in the idle state can be effectively reduced, and the storage volume of the pedal pump station is also reduced.

[0058] Reference Figure 4 and Figure 6 As shown in FIGS. 1 and 2, in some embodiments, the first connecting rod 51 and the second connecting rod 52 are both bent rods, the end of the second connecting rod 52 away from the first connecting rod 51 is bent towards the first direction, the first direction is opposite to the direction of stepping the pedal part 5, and the bending angle of the second connecting rod 52 is an obtuse angle, for example, the bending angle can be 120° or 150°, etc.

[0059] ​In the above embodiments, the bending shape of the first connecting rod 51 and the second connecting rod 52 can be variously selected, as long as the connection and cooperation with the first connecting part 3 and the second connecting part 4 are facilitated. By bending the end of the second connecting rod 52 towards a direction opposite to the direction in which the pedal part 5 is stepped, and setting the bending angle of the second connecting rod 52 as an obtuse angle, a suitable stepping angle can be provided for the operator, and the operation convenience of the pedal pump station is improved, wherein the angle of the obtuse angle can be adjusted according to actual needs.

[0060] Reference Figure 4 As shown in some embodiments, the pedal part 5 further comprises a pedal plate 53 arranged at the end of the second connecting rod 52, and the pedal plate 53 is arranged offset from the center line of the second connecting rod 52.

[0061] By arranging the pedal plate 53 at the end of the second connecting rod 52, the operator can control the pedal part 5 by stepping on the pedal plate 53, which helps to improve the comfort of stepping. By arranging the pedal plate 53 offset from the center line of the second connecting rod 52, interference between the pedal plate 53 and other parts of the personnel platform can be avoided after the pedal plate 53 is stepped on. For example, the pedal plate 53 can be arranged away from the side of the operation console on the working platform, so that the operator can avoid interference with the operation console when stepping on the pedal plate 53, and the operation space of the operator is increased. For details, please refer to Figure 8 As shown, wherein the orientation and distance of the pedal plate 53 offset from the center line of the second connecting rod 52 can be set according to actual installation needs. In addition, the installation angle between the pedal plate 53 and the second connecting rod 52 can be adjusted to obtain a comfortable stepping angle.

[0062] In some embodiments, the bending part of the flow channel in the interior of the valve body 1 is designed with a circular arc transition.

[0063] By adopting the design of circular arc transition, the pressure loss during the use of the pedal pump station can be effectively reduced, the impact pressure of the hydraulic oil in the flow channel on the bending part is reduced, the probability of leakage is reduced, and the service life of the valve body 1 is prolonged.

[0064] Reference Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, the valve body 1 comprises adjacent first, second and third sides, the suction pump 2 is installed on the first side, the foot pedal assembly is connected to the first side, the second side is provided with an oil outlet 11, a first oil inlet 12 and a second oil inlet 13 for connecting to an oil inlet line, the oil outlet 11 is in communication with the first oil inlet 12 and the second oil inlet 13 through a flow channel in the interior of the valve body 1; the valve assembly comprises a reversing valve 6, a check valve 7, a pressure measuring valve 8 and a relief valve 9, the reversing valve 6 is installed on the second side and is used to control the oil inlet line to supply oil to the first oil inlet 12 or the second oil inlet 13; the check valve 7 is installed on the second side and is used to prevent the hydraulic oil output from the valve body 1 from flowing back; the pressure measuring valve 8 is installed on the second side and is used to monitor the pressure of the hydraulic oil output from the valve body 1; the relief valve 9 is installed on the third side and is used to maintain the stability of the pressure in the interior of the valve body 1.

[0065] By reasonably arranging the suction pump 2, the foot pedal assembly, the reversing valve 6, the check valve 7, the pressure measuring valve 8 and the relief valve 9 and other components on different sides of the valve body 1, on the one hand, independent regional position division is formed, which facilitates the installation of related components and the later maintenance and replacement, and on the other hand, the overall structure of the foot pedal pump station is very compact, which can significantly reduce the overall space occupied by the foot pedal pump station, if the foot pedal pump station is installed on the personnel platform of the fire truck, the saved space can be used to arrange other rescue machines, which can effectively increase the rescue capacity of the personnel platform.

[0066] Based on the above-mentioned foot pedal pump station, the application further proposes a fire truck, which comprises the above-mentioned foot pedal pump station and a personnel platform for implementing fire fighting operations, and the foot pedal pump station is installed in the personnel platform.

[0067] Based on the above-mentioned foot pedal pump station, the application further proposes a foot pedal pump station manufacturing method, which comprises manufacturing the valve body 1 of the foot pedal pump station by using an additive manufacturing technology.

[0068] The valve body 1 is innovatively designed based on an additive manufacturing mode and is manufactured by using an additive forming (3D printing) mode, so it has a very high design freedom, in the design process, the interface layout of the valve body elements and the spatial arrangement of the flow channel and other contents can be comprehensively considered, different functional areas of the valve body 1 can be customized based on the target of facilitating the installation / replacement of the plug-in of the valve body 1, the arrangement of the connecting pipeline and the installation and fixation of the valve body, such a design can effectively improve the convenience of the foot pedal pump station in use and later maintenance.

[0069] Compared with the traditional machining method, the additive manufacturing method has high machining freedom, so it can manufacture structures that are difficult to obtain by traditional machining methods, for example, it can be realized that all the bending places of the flow channel in the valve body 1 are circularly transitioned when the flow channel is spatially arranged, and the flow channel path manufactured by the additive manufacturing method is simple and has no process hole, the pressure loss is reduced by more than 50% during use, and the probability of leakage is effectively reduced.

[0070] In some embodiments, the operation of manufacturing the valve body 1 of the foot pump station by using the additive manufacturing technology includes designing the valve body 1 by using a topology optimization method.

[0071] Topology optimization is a kind of structure optimization method, which can optimize the material distribution in the given design area according to the given load condition, constraint condition and performance index. When designing the valve body 1, the topology optimization method is used to design the structure and material of the valve body 1 according to specific target requirements.

[0072] For example, based on the design target of lightweight and miniaturization of the valve body 1, the appropriate material for manufacturing the valve body 1 is obtained by the topology optimization method, and the redundant structure of the valve body 1 is subtracted, so as to minimize the weight and volume of the valve body 1 while ensuring the structural strength and functional integrity of the valve body 1.

[0073] For example, in some embodiments, the valve body 1 is made of 316L stainless steel.

[0074] In other embodiments, in order to further reduce the weight, the valve body 1 is made of titanium alloy material or aluminum alloy material.

[0075] The specific structure of one embodiment of the foot pump station of the present application will be described below.

[0076] Reference Figure 1 and Figure 2 The foot pump station of the present application includes a valve body 1, a valve assembly, a suction pump 2 and a foot pedal assembly, the valve body 1 is made of additive manufacturing technology, the inside of the valve body 1 is provided with a flow channel; the valve assembly is installed on the valve body 1 and communicates with the flow channel inside the valve body 1; the suction pump 2 is installed on the valve body 1 and communicates with the flow channel inside the valve body 1; the foot pedal assembly is connected with the valve body 1 and is configured to control the suction and discharge action of the suction pump 2.

[0077] The specific structure and function of each component of the foot pump station are as follows:

[0078] (1) Valve body 1 and valve assembly, refer to Figure 1 and Figure 2 :

[0079] The valve assembly includes a one-way valve 7, a pressure measuring valve 8, an overflow valve 9 and a reversing valve 6, which is a manual reversing valve in this embodiment. The one-way valve 7 is configured to prevent backflow of the output flow, the pressure measuring valve 8 is configured to monitor the output pressure, the overflow valve 9 is configured for safety protection, and the reversing valve 6 is configured to change the direction of the hydraulic oil circuit manually.

[0080] Position of the oil port on the valve body 1 Figure 3 As shown, the second side of the valve body 1 is provided with an oil outlet 11, a first oil inlet 12 and a second oil inlet 13 for connecting to the oil inlet circuit, and the oil outlet 11 is in communication with the first oil inlet 12 and the second oil inlet 13 through the flow channel inside the valve body 1. The oil outlet 11 is shown as T, the first oil inlet 12 is shown as LS1, and the second oil inlet 13 is shown as LS2. The oil inlet circuit can be connected to LS1 or LS2 through the reversing valve 6, thereby realizing the function of reversing leveling.

[0081] (2) Suction pump 2 and foot pedal assembly, refer to Figure 3 and Figure 4 As shown:

[0082] In this embodiment, the suction pump 2 is a plunger pump, which serves as a power source (suction and discharge of oil). The foot pedal assembly includes a first connecting part 3, a second connecting part 4 and a foot pedal part 5, the first connecting part 3 includes a first connecting piece 31 and a second connecting piece 32, the second connecting part 4 includes a connecting column 41 and a spring 42, and the foot pedal part 5 includes a first connecting rod 51, a second connecting rod 52 and a pedal 53.

[0083] The first connecting piece 31 is annular and rotatably sleeved on the outer periphery of the suction pump 2, and can be freely rotated to change the use angle of the foot pedal assembly. The connecting column 41 has two ends connected with the first connecting rod 51 and the input shaft of the suction pump 2 respectively, and a flange portion 411 in the middle. The spring 42 is arranged between the flange portion 411 and the pump body, and is sleeved on the outer periphery of the input shaft of the suction pump 2 and the connecting column 41. The spring 42 can ensure that the foot pedal part 5 rebounds quickly after being stepped on.

[0084] The specific structure of the connecting column 41 is as shown in Figure 5As shown in the figure, the middle flange part 411 uses a step structure, which can ensure that the spring 42 is uniformly stressed and prevent the spring 42 from being offset in the compressed state. The two ends of the connecting column 41 are respectively provided with a first connecting hole 412 and a second connecting hole 413. The first connecting hole 412 at the top of the connecting column 41 is connected with the first connecting rod 51 of the pedal part 5 through a pin, and the second connecting hole 413 at the lower part of the connecting column 41 is connected with the input shaft of the suction pump 2 through an M8 internal hexagonal set screw. The center distance of the two holes is 29 mm, so that the pedal part 5 does not interfere with the valve body 1 after being stepped on. In this embodiment, the connecting column 41 is made of 316L stainless steel material.

[0085] In this embodiment, the height (i.e. free length) of the spring 42 is set to 55 mm, so that the spring 42 is in a natural and uncompressed state after being installed in cooperation with the flange part 411 of the connecting column 41 and the pump body of the suction pump 2, thereby ensuring that the pedal assembly is easy to install and that there is no idle stroke during the process of stepping on the folding pedal part 5.

[0086] In this embodiment, the first connecting rod 51 and the second connecting rod 52 of the pedal part 5 are connected through a pin shaft, and the second connecting rod 52 can be folded relative to the first connecting rod 51. For details, please refer to Figure 6 As shown in the figure, the straight rod part of the first connecting rod 51 is parallel to the straight rod part of the second connecting rod 52, the folding angle of the second connecting rod 52 is 120°, and the angle between the tread surface of the pedal 53 and the center line of the second connecting rod 52 is 35°, thereby ensuring the comfort of stepping. For the effect of the folded pedal part 5, please refer to Figure 7 As shown in the figure, the working space can be saved.

[0087] For details, please refer to Figure 8 As shown in the figure, in this embodiment, the pedal 53 of the pedal part 5 is biased to the left, i.e. the center line of the pedal 53 is offset to the left by 21.5 mm from the center line of the second connecting rod 52. After the offset, the pedal 53 will not interfere with other parts of the manned platform when being stepped on, thereby further improving the utilization efficiency of the platform space.

[0088] Based on the above-mentioned pedal pump station, the present application further provides a fire truck, which comprises the above-mentioned pedal pump station.

[0089] The specific working process of an embodiment of the fire truck of the present application will be described below.

[0090] Taking the manual leveling process of the manned platform of the fire truck as an example, please refer to Figure 8 As shown in the figure, the pedal pump station is installed in the manned platform of the fire truck. The functions of the pedal pump station include adjusting the manned platform upward / downward in the manual leveling mode and forming a loop for returning hydraulic oil to the oil tank in the electric control leveling mode. The specific description is as follows:

[0091] (1) The manned platform adopts a manual leveling mode: refer to Figure 8 When the directional control valve 6 is turned to the left from the center position, the LS1 circuit is connected, and the pedal 53 of the foot pedal 5 is repeatedly stepped on, driving the swing cylinder and causing the manned platform to rotate upward; when the directional control valve 6 is turned to the right from the center position, the LS2 circuit is connected, and the pedal 53 of the foot pedal 5 is repeatedly stepped on, driving the swing cylinder and causing the manned platform to rotate downward.

[0092] (2) The manned platform adopts the electric leveling mode: keep the reversing valve 6 in the neutral position, and connect the LS1 and LS2 circuits at the same time. The electric drive system controls the running direction of the swing cylinder through its own reversing valve, and the foot pump station serves as the return oil channel of the swing cylinder.

[0093] Through the description of several embodiments of the foot-operated pump station, its manufacturing method, and the fire truck of the present invention, it can be seen that the foot-operated pump station, its manufacturing method, and the fire truck of the present invention have at least the following advantages:

[0094] 1. Foot-operated pump stations are very easy to install and maintain. The valve body is designed with functional zones arranged according to actual usage. The valve body's plug-in (valve components, etc.), connecting pipes, and valve body fixing do not interfere with each other, making it very convenient for later maintenance and replacement.

[0095] 2. The foot-operated pump station occupies a small space volume. Based on the innovative design, structural topology and additive manufacturing of additive manufacturing, the flow channel of the valve body is short and the structure is very compact. At the same time, the foot-operated leveling does not require a large hand lever. The folded foot pedal can save 140mm of horizontal length when idle, which is 45% shorter than the length when not folded.

[0096] 3. The user experience of foot-operated pump stations and fire trucks has been effectively improved. Many details in the use of foot-operated pump stations have been fully considered. The free length of the spring and the cooperation between the flange and the pump body are taken into account. Progressive resistance is formed during the stepping process with no idle stroke. At the same time, the rapid rebound of the spring can effectively improve the operating efficiency. The folding foot pedal ensures convenient storage and the lever length for force application during operation. On the one hand, it is easy to store, and on the other hand, it can ensure quick and easy leveling under maximum load conditions. The pedal design allows the operator to maintain a comfortable force application angle with the sole of their foot when using the foot pedal.

[0097] 4. The foot pump station manufactured using the foot pump station manufacturing method of the present invention has a high degree of design freedom and reduced energy loss. The hydraulic flow channel with rounded transition can significantly reduce pressure loss during liquid flow. Compared with foot valve stations manufactured by traditional machining, the pressure loss of the foot pump station of the present invention can be reduced by more than 50%. At the same time, there are no process holes in the flow channel, which reduces the risk of leakage.

[0098] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit it; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced equivalently without departing from the principles of the present application, and these modifications and equivalent replacements should be covered in the technical solution range claimed by the present application.

Claims

1. A foot-operated pumping station, characterized in that, include: The valve body (1) is made using additive manufacturing technology, and the valve body (1) has a flow channel inside; A valve assembly is installed on the valve body (1) and communicates with the flow channel inside the valve body (1); A suction pump (2) is installed on the valve body (1) and communicates with the internal flow channel of the valve body (1); and The foot pedal assembly, connected to the valve body (1), is configured to control the oil suction and discharge actions of the suction pump (2). The valve body (1) includes an oil outlet (11) and a first oil inlet (12) and a second oil inlet (13) for connection with the oil inlet circuit. The oil outlet (11) is connected to the first oil inlet (12) and the second oil inlet (13) through the internal flow channel of the valve body (1). The foot pump station is used to be installed on the manned platform. The manned platform has a manual leveling mode and an electronic leveling mode. In the manual leveling mode, the oil inlet circuit is connected to the first oil inlet (12) or the second oil inlet (13) to drive the swing cylinder to adjust the angle of the manned platform. The oil outlet (11) is used as the return oil channel of the swing cylinder. In the electronic leveling mode, the electronic drive system controls the swing cylinder to move through its own reversing valve. The oil inlet circuit is connected to both the first oil inlet (12) and the second oil inlet (13). The oil outlet (11) is used as the return oil channel of the swing cylinder.

2. The foot-operated pump station according to claim 1, characterized in that, The foot pedal assembly includes a first connecting part (3), a second connecting part (4), and a foot pedal part (5). One end of the first connecting part (3) is connected to the suction pump (2), and the other end of the first connecting part (3) is rotatably connected to the foot pedal part (5). The second connecting part (4) is disposed between the foot pedal part (5) and the input shaft of the suction pump (2) so that the foot pedal part (5) can be rotated relative to the first connecting part (3) by stepping on the foot pedal part (5), thereby pressing the second connecting part (4) and thus pressing the input shaft of the suction pump (2).

3. The foot-operated pump station according to claim 2, characterized in that, The second connecting part (4) includes a connecting post (41) and a spring (42). The two ends of the connecting post (41) are respectively connected to the foot pedal (5) and the input shaft of the suction pump (2). The spring (42) is sleeved on the input shaft of the suction pump (2) and the outer periphery of the connecting post (41).

4. The foot-operated pump station according to claim 3, characterized in that, The connecting column (41) has a flange (411) in the middle. The suction pump (2) includes a pump body and an input shaft inserted in the pump body. The spring (42) is disposed between the flange (411) and the pump body. When the input shaft of the suction pump (2) is not pressed, the distance between the flange (411) and the pump body is equal to the free length of the spring (42).

5. The foot-operated pump station according to claim 3, characterized in that, The two ends of the connecting column (41) are respectively provided with a first connecting hole (412) and a second connecting hole (413) for connecting with the foot pedal (5) and the input shaft of the suction pump (2). The first connecting hole (412) and the second connecting hole (413) are separated by a preset distance to avoid interference between the foot pedal (5) and the valve body (1) during the rotation of the foot pedal (5) relative to the first connecting part (3).

6. The foot-operated pump station according to claim 2, characterized in that, The first connecting part (3) includes a first connecting member (31) and a second connecting member (32). The second connecting member (32) is connected between the first connecting member (31) and the foot pedal (5). The first connecting member (31) is annular and rotatably sleeved on the outer periphery of the suction pump (2) so that the first connecting part (3) is rotatable relative to the suction pump (2), thereby making the foot pedal (5) rotatable relative to the valve body (1).

7. The foot-operated pump station according to claim 2, characterized in that, The foot pedal (5) includes a first connecting rod (51) and a second connecting rod (52). The first connecting rod (51) is connected to the first connecting part (3), and the second connecting rod (52) is rotatably connected to the first connecting rod (51) so that the second connecting rod (52) can be folded relative to the first connecting rod (51).

8. The foot-operated pump station according to claim 7, characterized in that, Both the first connecting rod (51) and the second connecting rod (52) are bent rods. The end of the second connecting rod (52) away from the first connecting rod (51) is bent toward a first direction, which is the opposite direction to the direction of stepping on the foot pedal (5). The bending angle of the second connecting rod (52) is an obtuse angle.

9. The foot-operated pump station according to claim 7, characterized in that, The foot pedal (5) also includes a pedal (53) disposed at the end of the second connecting rod (52), the pedal (53) being disposed off-center from the center line of the second connecting rod (52).

10. The foot-operated pump station according to claim 1, characterized in that, All bends in the flow channels inside the valve body (1) are made of rounded arcs.

11. The foot-operated pump station according to claim 1, characterized in that, The valve body (1) includes an adjacent first side, a second side and a third side. The suction pump (2) is installed on the first side. The foot pedal assembly is connected to the first side. The second side is provided with an oil outlet (11) and a first oil inlet (12) and a second oil inlet (13) for connection with the oil inlet circuit. The oil outlet (11) is connected to the first oil inlet (12) and the second oil inlet (13) through the internal flow channel of the valve body (1). The valve assembly includes: A reversing valve (6) is installed on the second side and is used to control the oil inlet circuit to supply oil to the first oil inlet (12) or to the second oil inlet (13); A one-way valve (7) is installed on the second side to prevent the backflow of hydraulic oil output from the valve body (1); A pressure testing valve (8), mounted on the second side, is used to monitor the pressure of the hydraulic oil output from the valve body (1); and An overflow valve (9) is installed on the third side to maintain the stability of the internal pressure of the valve body (1).

12. A fire truck, characterized in that, Including the foot-operated pump station as described in any one of claims 1 to 11.

13. A method for manufacturing a foot-operated pumping station based on any one of claims 1 to 11, characterized in that, include: The valve body of the foot pump station was manufactured using additive manufacturing technology (1).

14. The method for manufacturing a foot-operated pump station according to claim 13, characterized in that, The operation of manufacturing the valve body (1) of the foot pump station using additive manufacturing technology includes: designing the valve body (1) using a topology optimization method.

Images