Patent ID: 12258981

It should be appreciated that the sizes of various parts shown in the drawings are not drawn in accordance with actual proportional relationships. In addition, same or similar reference numerals represent same or similar components.

DETAILED DESCRIPTION

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is only illustrative, and in no way serves as any limitation on the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to express fully the scope of the present disclosure to those skilled in the art. It is to be noted that unless specifically stated otherwise, the relative arrangement of components and steps, material components, numerical expressions and numerical values set forth in these embodiments should be construed as merely exemplary, rather than as limitations.

The words “first”, “second” and the like used in present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The word “comprise” or “include” or the like means that an element preceding the word covers listed elements following the word, and does not exclude the possibility of also covering other elements. The words “up”, “down”, “left”, “right” and the like are only used to indicate a relative positional relationship. When the absolute position of a described object changes, the relative positional relationship may also change accordingly.

In the present disclosure, when a particular device is described to be located between a first device and a second device, there may or may not be an intermediate device between the particular device and the first device or the second device. When a particular device is described to be connected to other device, the particular device may be directly connected to the other device without an intermediate device, or it may be not directly connected to the other device but there is an intermediate device.

All terms (including technical or scientific terms) used in the present disclosure have the same meaning as understood by those of ordinary skill in the field of the present disclosure, unless otherwise defined specifically. It should also be understood that terms such as those defined in generic dictionaries should be understood to have meanings consistent with their meanings in the context of the related art, and should not be construed in an idealized or overly formalized sense, unless so defined explicitly herein.

Technologies, methods, and equipment known to those of ordinary skill in the related art may be not discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the specification.

FIG.1is an installation structural diagram of some embodiments of an integrated hydraulic power device according to the present disclosure.FIG.2is a schematic view of the installation structure in which a hydraulic oil tank is omittedFIG.1.FIG.3is a schematic diagram of an internal flow passage structure of a valve body in embodiments of an integrated hydraulic power device according to the present disclosure.

Referring toFIGS.1to3, embodiments of the present disclosure provide an integrated hydraulic power device. The integrated hydraulic power device includes: an integrated valve1, a motor2, a hydraulic oil tank3, and a hydraulic pump4. The integrated valve1includes a valve body11. The valve body11has an internal flow passage structure14, a first mounting end111and a second mounting end112. Hydraulic oil can flow in flow passages of the internal flow passage structure14in order to achieve hydraulic functions as working oil or control oil.

The motor2is fixedly arranged at the first mounting end111. The hydraulic oil tank3is fixedly arranged at the second mounting end112. The hydraulic pump4is located within the hydraulic oil tank3and is in drive connection with the motor2. The hydraulic pump4has an oil suction port41for drawing oil from the hydraulic oil tank3. The internal flow passage structure14is communicated with the hydraulic oil tank3and the hydraulic pump4.

The motor2can output a torque to the hydraulic pump4to drive the hydraulic pump4to operate, so that the hydraulic pump4draws hydraulic oil from the hydraulic oil tank3and outputs the hydraulic oil to the internal flow path structure14. The hydraulic oil in the hydraulic oil tank3may be drawn directly into the hydraulic pump4, and may also be drawn into the hydraulic pump4through the internal flow passage structure14of the valve body11.

The hydraulic pump4can be, but is not limited to, a gear pump. The hydraulic pump can be fixed to the second mounting end112of the valve body by means of a bolt and embedded within the hydraulic oil tank3to achieve oil suction under direct drive of the motor2. Such a structure of embedding the hydraulic pump within the oil tank can effectively utilize the volume of internal space and reduce the volume of an integrated unit.

In this embodiment, the motor and the hydraulic oil tank are respectively fixedly arranged at the two mounting ends of the valve body of the integrated valve, and the hydraulic pump driven by the motor is arranged within the hydraulic oil tank and draws the oil directly from the hydraulic oil tank. Such an integrated hydraulic power device can achieve hydraulic oil output of the hydraulic oil tank by using the motor and the hydraulic pump, and guide and control the hydraulic oil through the internal flow passage structure of the integrated valve. Moreover, in such an integrated hydraulic power device structure. The motor and the hydraulic oil tank are assembled by means of the mounting ends of the valve body, and the hydraulic pump is arranged within the hydraulic oil tank, such that the integrated hydraulic power device structure is very compact and many external pipelines are omitted, thus effectively reducing space occupation.

Referring toFIG.2, in some embodiments, the integrated hydraulic power device further includes an oil port component5. The oil port component5is provided within the hydraulic oil tank3and can implement oil return from the internal flow passage structure14to the hydraulic oil tank3.

The oil port component5can also implement oil supply from the hydraulic oil tank3to an external backup power system through the internal flow passage structure14. That is, in addition to supplying the hydraulic oil to the hydraulic pump4, the hydraulic oil tank3can also supply the hydraulic oil to an external backup power system (e.g., a manual or electric power unit).

Referring toFIG.2, in some embodiments, the valve body11further has a valve body oil inlet112c(referring toFIG.7), and the oil port component5includes an oil port end51and a hose52. One end of the hose52is connected to the valve body oil inlet112cand the other end of the hose52is fluidly connected to the oil port end51. The oil port end51is relatively heavy and can be made of a metal material.

Since the hose52is flexible, it can be bent and swung. Thus, by using the self-weight of the oil port end51, the oil port end51is always located at a low position of the whole hydraulic oil tank3, thereby always remaining in effective contact with the oil in the hydraulic oil tank3, as the attitude and position of the integrated hydraulic power device change. This ensures the versatility of the integrated hydraulic power device in both rotating and stationary scenarios.

To ensure the purity of the hydraulic oil sucked into the hydraulic pump4, in some embodiments, the oil port component5further includes a filter53. The filter53is located at the oil port end51. The hydraulic oil entering the oil port end51is filtered by the filter53.

To achieve the function of internal flow passages of the integrated hydraulic power device and a communication relationship with external elements, in some embodiments, the valve body11is a metal 3D printing valve body. That is to say, the valve body11can be formed by a metal 3D printing process according to a designed valve body model. The metal 3D printing process may include a direct metal laser sintering process, a selective laser melting process or an electron beam melting process.

Using the metal 3D printing process to form the valve body11can achieve shape follow-up design and compact arrangement of hydraulic flow passages, and reduce a flow passage pressure loss by 60% or more. Referring to a topological structure of internal flow passages shown inFIG.3, a diameter of the internal flow passages of the valve body11is less than or equal to 6 mm, which can improve the integration level of the valve body, reduce the size of the valve body, lower the weight of the valve body, and reduce the manufacturing difficulty of the valve body.

In order to achieve light-weighting of the valve body, the material of the metal 3D printing valve body may include stainless steel, aluminum-magnesium-copper alloy, aluminum-magnesium-copper-zinc alloy, or aluminum-magnesium-silicon alloy. The material of the metal 3D printing valve body can be selected according to a system pressure of a hydraulic system. In some embodiments, if the system pressure is greater than or equal to 20 MPa, then stainless steel, aluminum-magnesium-copper alloy, aluminum-magnesium-copper-zinc alloy or the like can be selected. In some other embodiments, if the system pressure is less than 20 MPa, aluminum-magnesium-silicon alloy such as AlSi10 Mg, or the like can be selected.

In designing of the valve body of the integrated valve, an optimal mode of placement can be determined based on a support volume and printing time calculated by Magic software; and the metal 3D printing process of the integrated valve can be designed based on a nesting method of multiple types of support structures in conjunction with a reverse deformation compensation strategy. A reverse deformation compensation model is exported by using a simulation software, and a compensation ratio can be set to −0.8. Using a reverse deformation compensation printing process, the printing precision of the valve body of the integrated valve is improved by 50% or more.

FIG.4is a structural diagram of a motor in embodiments of an integrated hydraulic power device according to the present disclosure. Referring toFIG.4, in some embodiments, the motor2can be a DC brushless motor or a servo motor. For different motor types, corresponding types of integrated valves can be used in combination therewith.

In some embodiments, the valve body11further has a plug-in port, and the integrated valve1further includes a hydraulic control plug-in connector, which is plugged in the plug-in port. The type of the integrated valve can be determined based on differences in factors such as the internal flow path structure of the valve body and the type and number of the hydraulic control plug-in connector that is plugged in the valve body.

FIG.5is a structural diagram of a pump-controlled control valve in embodiments of an integrated hydraulic power device according to the present disclosure. Referring toFIG.5, in some embodiments, the motor2is a servo motor, and accordingly, the integrated valve1is a pump-controlled control valve12, and the hydraulic control plug-in connector includes at least one of a first one-way valve121, an solenoid directional control valve122, first shuttle valves123,124, a first overflow valve125, and a first pressure measuring valve126.

By configuring the first shuttle valves123,124, it facilitates connecting a backup power system externally of an integrated hydraulic power unit to achieve double protection; by configuring the first one-way valve121, it prevents return of a flow output from the pump; by configuring the solenoid directional control valve122, the direction of the hydraulic oil can be changed; by configuring the first pressure measuring valve126, an output pressure at a pump port is monitored; and by configuring the first overflow valve125, it can provide overflow safety protection for the hydraulic system.

FIG.6is a structural diagram of a valve-controlled control valve in embodiments of an integrated hydraulic power device according to the present disclosure. Referring toFIG.6, in some embodiments, the motor2is a DC brushless motor, and accordingly the integrated valve1is a valve-controlled control valve13, and the hydraulic control plug-in connector includes at least one of a second one-way valve131, a pressure compensator132, an electromagnetic proportional reversing valve133, second shuttle valves134,135,136, a second overflow valve137, and a second pressure measuring valve138.

By configuring the second shuttle valves134,135,136, it facilitates connecting a backup hydraulic power unit externally of an integrated hydraulic power unit to achieve double protection; and by configuring the second one-way valve131, it prevents return of a flow output from the pump. Different from the pump-controlled scheme, by configuring the electromagnetic proportional reversing valve133, the direction and flow capacity of the hydraulic oil can be changed; by configuring the second pressure measuring valve138, an output pressure at a pump port is monitored; and by configuring the second overflow valve137, it can provide overflow safety protection for the hydraulic system.

FIG.7is a schematic diagram of a side where the second mounting end is located in embodiments of an integrated hydraulic power device according to the present disclosure. Referring toFIGS.1,2and7, in some embodiments, the first mounting end111and the second mounting end112are located on two opposite sides of the valve body11, and the valve body11further has a central hole114running through the first mounting end111and the second mounting end112, a power output shaft21of the motor2being in drive connection with the hydraulic pump4through a coupling provided in the central hole114.

As the first mounting end111and the second mounting end112are located on the two opposite sides of the valve body11, the hydraulic pump4do not interfere with each of both the hydraulic oil tank3and the motor2. Therefore, there is more flexibility in model selection and dimensions, and the relevant hydraulic plug-in can be arranged in a region between the first mounting end111and the second mounting end112. The motor2can also use the central hole114to transmit power to the hydraulic pump4through the coupling so that the hydraulic pump4works.

Referring to the two types of integrated valves shown inFIGS.5and6, on the side where the first mounting end111is located, the motor2can be threaded connected to a plurality of motor mounting fixing holes111alocated at the first mounting end111by means of bolts. Referring toFIG.7, on the side where the second mounting end112is located, the hydraulic oil tank3is threaded connected to a plurality of tank mounting fixing holes112alocated at the second mounting end112by means of bolts.

InFIG.7, the hydraulic pump4can be threaded connected to a pump mounting fixing hole112blocated at the second mounting end112by means of a bolt. The hydraulic pump4and the hose52of the oil port component5can be respectively connected to a pump oil suction port112eand a valve body oil inlet112con the second mounting end112. A load sensitive oil port112dmay also be provided on the second mounting end112.

FIG.8is a structural diagram of a hydraulic oil tank in embodiments of an integrated hydraulic power device according to the present disclosure. Referring toFIG.8, in some implementations, the material of the hydraulic oil tank3is a non-metallic material. Using a suitable non-metallic material can meet some specific needs for the integrated hydraulic power device, such as a reduced weight, reduced manufacturing difficulty, and the use of an unconventional shape.

For example, to achieve a special-shaped oil tank and reduce the weight and manufacturing cost of the oil tank, the non-metallic material may include polyethylene or polypropylene. In forming, a rotational molding or blow molding process can be used for forming, which is conducive to the manufacture of a hydraulic oil tank with a predetermined wall thickness (e.g., a wall thickness of 5 mm) and a specific shape.

InFIG.8, the hydraulic oil tank3may include a first part31and a second part32. The first part31is cylindrical in shape and has one end connected to the second mounting end112. The second part32is connected to the other end of the first part31away from the valve body11and is internally communicated with the first part31. In an axis direction of the first part31, an inner cavity cross-sectional area of the second part32is larger than an inner cavity cross-sectional area of the first part31.

In the hydraulic oil tank3with such a structure, the smaller inner cavity cross-sectional area is matched with the second mounting end of the valve body to lower dimensional requirements on the valve body, and the larger inner cavity cross-sectional area is used to increase the capacity of the valve body in order to accommodate more hydraulic oil and improve system performance.

FIG.9is a schematic view of the installation structure in which the motor and hydraulic pump are omitted inFIG.2.FIG.10is a structural diagram of a clamping ring in embodiments of an integrated hydraulic power device according to the present disclosure.FIG.11is a structural diagram of a segment of the clamping ring inFIG.10.

Referring toFIGS.8to11, in some embodiments, an open end of the hydraulic oil tank3has an annular flange33that protrudes radially outward. The integrated hydraulic power device further includes: a clamping ring6, a first seal ring71and a second seal ring72. The clamping ring6is sleeved outside the annular flange33, and the hydraulic oil tank3is fixed to the second mounting end112by means of bolts through the clamping ring6.

Referring toFIGS.10and11, in some embodiments, the clamping ring6includes a plurality of segments61,62. The plurality of segments61,62are connected successively along a circumferential direction of the clamping ring6. The plurality of segments61,62can be spliced to form a closed-loop clamping ring6, thereby simplifying installation and detachment.

InFIG.11, a segment of the clamping ring6includes a connected first part6aand second part6balong an axial direction of the clamping ring6. The first part6ais thinner in a radial direction than the second part6b. The first part6aand the second part6bcan form a step structure at an inner side of the clamping ring6so as to be in limiting fit with the annular flange33.

The first part6ais provided with a mounting hole6dat an end protruding on one side in the circumferential direction relative to the second part6b, and the second part6bis provided with a mounting hole6eat an end protruding on the other side in the circumferential direction relative to the first part6a. The mounting hole6dof one segment can be spliced with the mounting hole6eof another segment and then fixed thereto by a bolt, and the mounting holes6ethereof can be spliced with the mounting hole6dof the other segment and then fixed thereto by a bolt. A mounting hole6cmay also be provided at the middle of the first part6a(i.e., at a position between the mounting holes6dand6e).

Referring toFIG.9, the first seal ring71is located between the second mounting end112and an inner cavity surface of the open end. Specifically, the first seal ring71may include an O-ring seal. The second seal ring72is located between the second mounting end112and the clamping ring6. Specifically, the second seal ring72may include a flat washer.

Considering that if a non-metallic oil tank is adopted, there is a possibility of deformation and aging of the non-metallic oil tank, which may lead to leakage of the oil tank, a double sealing structure formed by the first seal ring71and the second seal ring72is used, which can effectively solve the problem of deformation of the non-metallic oil tank and ensure the sealing reliability of a whole integrated hydraulic power unit.

FIG.12is a structural diagram of some embodiments of a fire truck according to the present disclosure. The above embodiments of the integrated hydraulic power device of the present disclosure can be applied to various work scenarios that need hydraulic drive, including various engineering machinery products. An example is a aerial platform fire truck with many restrictions on weight and use of space. Thus, with reference toFIG.12, embodiments of the present disclosure also provide a fire truck8including the integrated hydraulic power device in any of the foregoing embodiments. The fire truck here can be an aerial ladder fire truck, a lift-up fire engine or an aerial work platform truck.

InFIG.12, the fire truck8may include a chassis81, a turntable84, an arm82and an aerial work platform83. The arm82is rotatably arranged on the chassis81through the turntable84, and the aerial work platform83may be arranged on the top of the arm82. The integrated hydraulic power device in embodiments of the disclosure may be arranged at various locations on the fire truck8, optionally on the aerial work platform83.

At this point, embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

Although some specific embodiments of the present disclosure have been described in detail by using examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that modifications to the above embodiments or equivalent substitutions to part of technical features can be made without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.