Electro-hydraulic power device and working equipment

Abstract

The utility model relates to the field of hydraulic pressure, and discloses an electro-hydraulic power device and operation equipment. The motor pump is arranged in the shell assembly and comprises a motor, a motor driver and a hydraulic pump driven by the motor; the heat dissipation assembly is provided with a heat dissipation oil cavity, first heat dissipation fins, second heat dissipation fins and a reinforced heat dissipation module, the heat dissipation oil cavity is formed in the shell assembly and can dissipate heat for the motor and the hydraulic pump, the first heat dissipation fins are connected to the shell assembly and can dissipate heat for the heat dissipation oil cavity, and the second heat dissipation fins are connected to the shell assembly and can dissipate heat for the motor driver; the reinforced heat dissipation module is connected to the shell assembly and at least can dissipate heat for the heat dissipation oil cavity. The electro-hydraulic power device is excellent in heat dissipation performance, high in working performance and long in service life, can be used as an independent power device with efficient heat dissipation performance, and is higher in practicability compared with an existing integrated electric drive hydraulic power source.

Description

Technical Field

[0001] This application belongs to the field of hydraulic technology, and particularly relates to an electro-hydraulic power device and a working equipment. Background Art

[0002] In order to solve the defects of the electric drive hydraulic power source composed of components such as a decentralized motor, hydraulic pump, fuel tank, control valve, and hydraulic accessories in traditional hydraulic technology, namely low integration and power density, and inability to meet the lightweight requirements of mobile equipment, research work on the configuration optimization of the electric drive hydraulic power source has been carried out to varying degrees at present, including in the field of new energy vehicles. However, despite this, most of these studies do not consider the heat dissipation problem of the integrated electric drive hydraulic power source. Since too high working temperature will seriously affect the working performance and service life of hydraulic components and motors, and cause such power sources unable to be used without an external cooler, it is necessary to further optimize such power sources regarding the heat dissipation problem at the present stage. Utility Model Content

[0003] The purpose of this application is to provide an electro-hydraulic power device and a working equipment, which can effectively overcome the heat dissipation performance defects of the existing integrated electric drive hydraulic power source.

[0004] To achieve the above purpose, on the one hand, this application provides an electro-hydraulic power device, which includes:

[0005] A housing assembly;

[0006] A motor pump, which is arranged in the housing assembly and includes a motor, a motor driver, and a hydraulic pump driven by the motor;

[0007] A heat dissipation assembly, which is provided with a heat dissipation oil cavity, a first heat sink, a second heat sink, and a strengthened heat dissipation module. The heat dissipation oil cavity is formed in the housing assembly and can dissipate heat for the motor and the hydraulic pump. The first heat sink is connected to the housing assembly and can dissipate heat for the heat dissipation oil cavity. The second heat sink is connected to the housing assembly and can dissipate heat for the motor driver. The strengthened heat dissipation module is connected to the housing assembly and can at least dissipate heat for the heat dissipation oil cavity.

[0008] In some embodiments, the strengthened heat dissipation module includes an air-cooling module, and the air-cooling module is provided with a fan assembly and a guide cylinder. The fan assembly is arranged outside one axial end of the housing assembly, and the guide cylinder is sleeved outside the peripheral wall of the housing assembly;

[0009] Wherein, a first air-cooling channel is formed among the air outlet end of the fan assembly, one axial end of the housing assembly facing the fan assembly, and the guide cylinder, and a second air-cooling channel communicating with the first air-cooling channel is formed between the guide cylinder and the housing assembly.

[0010] In some embodiments, the heat dissipation oil cavity is formed as an annular oil cavity surrounding the motor and the hydraulic pump, and the second air-cooling channel is formed as an annular air duct surrounding the annular oil cavity.

[0011] In some embodiments, a plurality of heat dissipation holes are formed in the peripheral wall of the guide cylinder, and both the first air-cooling channel and the second air-cooling channel communicate with the plurality of heat dissipation holes.

[0012] In some embodiments, a first connection structure and a second connection structure are respectively provided at two axial ends of the guide cylinder. The fan assembly is connected to the first connection structure, and the housing assembly is connected to the second connection structure.

[0013] In some embodiments, the electro-hydraulic power device further includes a temperature sensor disposed in the housing assembly and configured to detect the temperature of the motor. The fan assembly is communicatively connected to the temperature sensor. In a state where the temperature of the motor is higher than a preset maximum temperature, the fan assembly operates.

[0014] In some embodiments, at least a part of the first heat dissipation fins is disposed on the outer peripheral wall of the housing assembly and located within the second air-cooling channel; and / or, at least a part of the second heat dissipation fins is disposed on the axial end wall of the housing assembly and located within the first air-cooling channel.

[0015] In some embodiments, the first heat dissipation fins include wavy heat dissipation fins disposed on the outer peripheral wall of the housing assembly; and / or, the second heat dissipation fins include spiral heat dissipation fins disposed on the axial end wall of the housing assembly.

[0016] In some embodiments, the electro-hydraulic power device further includes a boosting assembly embedded in the housing assembly and configured to boost the hydraulic oil in the heat dissipation oil cavity.

[0017] In some embodiments, the electro-hydraulic power device further includes an integrated valve block connected to one axial end of the housing assembly. The oil inlet of the integrated valve block is communicated with the oil outlet of the hydraulic pump.

[0018] In some embodiments, a housing oil inlet channel and a housing oil outlet channel are formed in the housing assembly. The oil cavity outlet of the heat dissipation oil cavity, the housing oil inlet channel, and the oil inlet of the hydraulic pump are sequentially communicated. The oil outlet of the hydraulic pump, the housing oil outlet channel, and the oil inlet of the integrated valve block are sequentially communicated.

[0019] In some embodiments, the housing assembly is provided with a first housing, a second housing, and a third housing. The first housing houses the motor and the hydraulic pump. The second housing is connected to an axial end of the first housing and houses the motor driver. The third housing is sleeved outside the peripheral wall of the first housing.

[0020] Wherein, the heat dissipation oil cavity is formed between the first housing and the third housing. The first heat sink is arranged on the outer wall of the third housing, and the second heat sink is arranged on the outer wall of the second housing.

[0021] The second aspect of the present application further provides an operating device, which includes the above-mentioned electro-hydraulic power device.

[0022] Through the above technical solution, when the electro-hydraulic power device of the present application is working, the heat generated by the motor and the hydraulic pump can be taken away by the hydraulic oil flowing in the heat dissipation oil cavity and transferred to the first heat sink, which is convenient for centralized heat dissipation. The heat generated by the motor driver can be transferred to the second heat sink. Due to the large heat dissipation area of the first heat sink and the second heat sink, the heat dissipation efficiency of the motor, the hydraulic pump and the motor driver can be greatly improved. In addition, the heat dissipation oil cavity and even the first heat sink and the second heat sink can be strengthened by using a heat dissipation strengthening module, thereby further improving the heat dissipation performance of the electro-hydraulic power device.

[0023] When using the heat dissipation oil cavity, the first heat sink, the second heat sink, and the heat dissipation strengthening module for heat dissipation, for example, the parameters of the first heat sink and the second heat sink can be matched and designed according to the power of the electro-hydraulic power device, so that the electro-hydraulic power device can work in the high-efficiency temperature range only by natural convection without running the heat dissipation strengthening module under normal working conditions; while under the high-speed heavy-load working conditions of the electro-hydraulic power device, the heat dissipation strengthening module can be run to further improve the heat dissipation efficiency of the heat dissipation oil cavity and even the first heat sink and the second heat sink, so as to ensure that the electro-hydraulic power device can still work in the high-efficiency temperature range.

[0024] It can be seen that the electro-hydraulic power device of the present application has excellent heat dissipation performance. The working performance of its motor and hydraulic components can be effectively improved, and the service life can be effectively extended. Moreover, the electro-hydraulic power device can be used as an independent power device with high heat dissipation performance without an external cooler. Therefore, it has stronger practicability than the existing integrated electric drive hydraulic power source.

[0025] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific embodiment part. Description of the Drawings

[0026] The accompanying drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings. In the drawings:

[0027] Figure 1 is a longitudinal sectional view of a kind of electro-hydraulic power device in the specific embodiment of the present application;

[0028] Figure 2 is Figure 1 a transverse sectional view of the electro-hydraulic power device in

[0029] Figure 3 is Figure 1 a schematic diagram of the flow guiding cylinder in

[0030] Figure 4 is Figure 1 a schematic diagram of the third housing in

[0031] Figure 5 is Figure 1 a schematic diagram of the second housing in

[0032] Figure 6 is Figure 1 another longitudinal sectional view of the first housing in

[0033] Explanation of reference numerals

[0034] 1 Fan assembly 2 Flow guiding cylinder

[0035] 3 Second heat sink 4 Motor driver

[0036] 5 Bearing end cover 6 Housing end cover

[0037] 7 Bearing 8 First housing

[0038] 9 Third housing 10 Motor

[0039] 11 Power shaft 12 Hydraulic pump

[0040] 13 Boosting assembly 14 Integrated valve block

[0041] 15 First heat sink 16 Heat dissipation oil cavity

[0042] 17 Second housing 18 Second air-cooling channel

[0043] 81 Motor installation cavity 82 Hydraulic pump installation cavity

[0044] 83 Shell oil inlet channel 84 Shell oil outlet channel

[0045] 131 Limiting screw plug 132 Piston

[0046] 133 Spring 134 Sealing ring DETAILED DESCRIPTION

[0047] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0048] Reference Figures 1 to 6 A first exemplary embodiment of the present application provides an electro-hydraulic power device, which includes a motor pump, a housing assembly and a heat dissipation assembly.

[0049] Specifically, the motor pump is arranged in the housing assembly and includes a motor 10, a motor driver 4 and a hydraulic pump 12 (such as a gear pump, a plunger pump, a vane pump, etc.). When the motor driver 4 drives the motor 10 to operate, the motor 10 can drive the hydraulic pump 12 to operate, and by adjusting the speed of the motor 10 by the motor driver 4, the output flow of the hydraulic pump 12 can be changed, and the movement speed of the hydraulic actuator connected to the hydraulic pump 12 can be adjusted.

[0050] The heat dissipation assembly is provided with a heat dissipation oil chamber 16, a first heat sink 15, a second heat sink 3 and a reinforced heat dissipation module. The heat dissipation oil chamber 16 is formed in the housing assembly, and the oil in the heat dissipation oil chamber 16 can take away the heat generated by the motor 10 and the hydraulic pump 12 when flowing, that is, the heat dissipation oil chamber 16 can dissipate heat for the motor 10 and the hydraulic pump 12. It should be noted that the heat dissipation oil chamber 16 can only be used to dissipate heat for the motor 10 and the hydraulic pump 12. In this case, an additional oil supply chamber needs to be integrated in the electro-hydraulic power device to supply oil to the hydraulic pump 12. Alternatively, the heat dissipation oil chamber 16 can also be used as an oil supply chamber. In this case, the oil chamber inlet of the heat dissipation oil chamber 16 can be formed on the shell wall of the shell assembly and the oil chamber outlet is connected to the oil inlet of the hydraulic pump 12. In this way, when the motor driver 4 drives the motor 10 to drive the hydraulic pump 12 to run, the oil inlet of the hydraulic pump 12 will suck oil from the oil chamber outlet of the heat dissipation oil chamber 16, and then the hydraulic pump 12 will pump the oil to the hydraulic actuator through its own oil outlet, and the oil flowing back from the hydraulic actuator will flow back to the oil chamber inlet of the heat dissipation oil chamber 16. Therefore, when the motor pump is running, the hydraulic oil will circulate along this path, and the hydraulic oil can take away the heat generated by the motor 10 and the hydraulic pump 12 when flowing in the heat dissipation oil chamber 16.

[0051] In addition, the first heat sink 15 and the second heat sink 3 are respectively connected to the housing assembly. The heat of the oil in the oil cooling chamber 16 can be further transferred to the first heat sink 15 for external dissipation, that is, the first heat sink 15 can dissipate heat from the oil cooling chamber 16. The heat generated by the motor driver 4 can be transferred to the second heat sink 3 for external dissipation, that is, the second heat sink 3 can dissipate heat from the motor driver 4.

[0052] If it is necessary to further improve the heat dissipation effect, the heat dissipation of the motor pump can also be enhanced through the enhanced heat dissipation module. Specifically, the enhanced heat dissipation module is connected to the housing assembly and can at least dissipate heat from the oil cooling chamber 16. In other words, the enhanced heat dissipation module can at least further improve the heat dissipation effect on the motor 10 and the hydraulic pump 12. In some working conditions, the enhanced heat dissipation module can even dissipate heat from the oil cooling chamber 16, the first heat sink 15 and the second heat sink 3 at the same time, that is, the overall heat dissipation effect on the motor 10, the hydraulic pump 12 and the motor driver 4 is improved.

[0053] Through the above settings, when the electro-hydraulic power device of the present application is working, the heat generated by the motor 10 and the hydraulic pump 12 can be carried away by the hydraulic oil flowing in the oil cooling chamber 16 and transferred to the first heat sink 15 for centralized heat dissipation. The heat generated by the motor driver 4 can be transferred to the second heat sink 3. Since the first heat sink 15 and the second heat sink 3 have a large heat dissipation area, the heat dissipation efficiency of the motor 10, the hydraulic pump 12 and the motor driver 4 can be greatly improved. In addition, the oil cooling chamber 16, and even the first heat sink 15 and the second heat sink 3 can also be strengthened for heat dissipation by using the enhanced heat dissipation module, thereby further improving the heat dissipation performance of the electro-hydraulic power device.

[0054] When using the oil cooling chamber 16, the first heat sink 15, the second heat sink 3, and the enhanced heat dissipation module for heat dissipation, for example, the parameters (such as shape, arrangement area, etc.) of the first heat sink 15 and the second heat sink 3 can be matched and designed according to the power of the electro-hydraulic power device, so that the electro-hydraulic power device can work in the high-efficiency temperature range without running the enhanced heat dissipation module and only using natural convection under normal working conditions (that is, under low-speed and light-load working conditions); while under the high-speed and heavy-load working conditions of the electro-hydraulic power device, the enhanced heat dissipation module can be operated to further improve the heat dissipation efficiency of the oil cooling chamber 16 and even the first heat sink 15 and the second heat sink 3, so as to ensure that the electro-hydraulic power device can still work in the high-efficiency temperature range.

[0055] It can be seen that the electro-hydraulic power device of the present application has excellent heat dissipation performance, the working performance of the motor 10 and the hydraulic components including the hydraulic pump 12 can be effectively improved, the service life can be effectively extended, and the electro-hydraulic power device can be used as an independent power device with high-efficiency heat dissipation performance without an external cooler. Therefore, it has stronger practicability than the existing integrated electric drive hydraulic power source.

[0056] In some embodiments, the housing assembly is provided with a first housing 8, a second housing 17 and a third housing 9. Among them, the first housing 8 is internally provided with a motor 10 and a hydraulic pump 12. For example, referring to Figure 6 , a motor installation cavity 81 and a hydraulic pump installation cavity 82 can be provided inside the first housing 8 to install the motor 10 and the hydraulic pump 12 respectively, or a single installation cavity can be provided inside the first housing 8 to install the motor 10 and the hydraulic pump 12 simultaneously. In addition, the second housing 17 is connected to an axial end of the first housing 8 and internally provided with a motor driver 4, while the third housing 9 is sleeved outside the peripheral wall of the first housing 8.

[0057] Based on the structural composition of the housing assembly of this embodiment, a heat dissipation oil cavity 16 can be formed between the first housing 8 and the third housing 9, a first heat sink 15 can be arranged on the outer wall of the third housing 9, and a second heat sink 3 can be arranged on the outer wall of the second housing 17.

[0058] Furthermore, referring to Figure 4 , the first heat sink 15 can also be regarded as part of the third housing 9; and / or, referring to Figure 5 , the second heat sink 3 can also be regarded as part of the second housing 17, which is beneficial to simplifying the production and assembly processes of the electro-hydraulic power device of the present application.

[0059] In some embodiments, the enhanced heat dissipation module can include an air-cooling module, and the air-cooling module is provided with a fan assembly 1 and a guide cylinder 2. Specifically, the fan assembly 1 is arranged outside an axial end of the housing assembly (for example, the fan assembly 1 and the first housing 8 can be respectively arranged at the two axial ends of the second housing 17), while the guide cylinder 2 is sleeved outside the peripheral wall of the housing assembly. In addition, a first air-cooling channel is formed among the air outlet end of the fan assembly 1, the axial end of the housing assembly facing the fan assembly 1, and the guide cylinder 2, and a second air-cooling channel 18 communicating with the first air-cooling channel is formed between the guide cylinder 2 and the housing assembly.

[0060] When the fan assembly 1 operates to form a heat dissipation air flow, the heat dissipation air flow can sequentially pass through the first air-cooling channel and the second air-cooling channel 18 and be discharged outside the guide cylinder 2. More specifically, by arranging the guide cylinder 2, the heat dissipation air flow can be constrained to flow along the axial direction of the guide cylinder 2, and compared with the open heat dissipation condition without the guide cylinder 2, the existence of the first air-cooling channel and the second air-cooling channel 18 can appropriately narrow the flow cross-section through which the heat dissipation air flow passes, thereby accelerating the flow rate of the heat dissipation air flow, quickly taking away the heat generated by the motor pump, so as to prevent the heat from staying around the housing assembly for a long time, and further being beneficial to improving the heat dissipation efficiency.

[0061] In some embodiments, the heat dissipation oil cavity 16 is formed as an annular oil cavity surrounding the motor 10 and the hydraulic pump 12, which can not only increase the oil storage space of the heat dissipation oil cavity 16, but also increase the heat conduction area between the motor 10 and the hydraulic pump 12 and the hydraulic oil in the heat dissipation oil cavity 16, so that the heat in each circumferential region of the motor pump can be taken away by the oil in the heat dissipation oil cavity 16 at a relatively fast speed. At the same time, the second air cooling channel 18 is formed as an annular air duct surrounding the annular oil cavity, so that the heat of the oil in each region of the heat dissipation oil cavity 16 can be taken out by the cooling air flow passing through the second air cooling channel 18 to the outside of the guide cylinder 2 at a relatively fast speed, thereby shortening the residence time of the heat around the housing assembly and further improving the heat dissipation efficiency.

[0062] In some embodiments, a plurality of heat dissipation holes are formed in the peripheral wall of the guide cylinder 2, and the first air cooling channel and the second air cooling channel 18 are both communicated with the plurality of heat dissipation holes.

[0063] In this structure, when the fan assembly 1 is not operating, the low-temperature air outside the guide cylinder 2 (the low temperature here is relative to the air temperature around the housing assembly) can be replenished into the first air cooling channel and the second air cooling channel 18 through the plurality of heat dissipation holes in large quantities to participate in heat exchange, realizing the rapid cooling of the air around the housing assembly.

[0064] When the fan assembly 1 is operating, part of the cooling air flow in the first air cooling channel and the second air cooling channel 18 can be discharged outside the guide cylinder 2 through the plurality of heat dissipation holes first. And relative to the cross-sectional area of the first air cooling channel and the second air cooling channel 18, the cross-sectional area of the heat dissipation holes is smaller. Therefore, when this part of the cooling air flow passes through the heat dissipation holes from the first air cooling channel or the second air cooling channel 18, the cross-section is narrowed, making the flow speed of this part of the cooling air flow increase, and the heat can be taken out of the guide cylinder 2 faster, thereby further improving the heat dissipation efficiency.

[0065] In some embodiments, a first connection structure and a second connection structure are respectively provided at the two axial ends of the guide cylinder 2. The fan assembly 1 is connected to the first connection structure, and the housing assembly is connected to the second connection structure (for example, the third housing 9 is connected to the second connection structure), so that the fan assembly 1, the guide cylinder 2 and the housing assembly can be fixed to each other.

[0066] For example, referring to Figure 3 , the first connection structure may include a plurality of first connection parts that extend radially outward at one axial end of the guide cylinder 2 and are arranged at intervals in the circumferential direction. A plurality of fan housing connection parts corresponding to the plurality of first connection parts are provided on the fan housing of the fan assembly 1. By respectively connecting the plurality of first connection parts and the plurality of fan housing connection parts in alignment (for example, connecting through a bolt assembly), the guide cylinder 2 and the fan assembly 1 can be fixed to each other.

[0067] For another example, the second connection structure may include a plurality of second connection portions that extend radially inward at the other axial end of the draft tube 2 and are arranged at intervals in the circumferential direction. One axial end of the third housing 9 is provided with a plurality of third housing connection portions that are aligned with the plurality of second connection portions one by one. By respectively connecting the plurality of second connection portions and the plurality of third housing connection portions in alignment (for example, connecting through a bolt assembly), the draft tube 2 and the third housing 9 can be fixed to each other. Since the first housing 8, the second housing 17, and the third housing 9 are fixed to each other, the mutual fixation of the draft tube 2 and the housing assembly is thus achieved.

[0068] In some embodiments, the electro-hydraulic power device may include a temperature sensor disposed within the housing assembly and configured to detect the temperature of the motor 10 (for example, the temperature sensor may be disposed within the first housing 8). The fan assembly 1 is communicatively connected to the temperature sensor. In a state where the temperature of the motor 10 is higher than a preset maximum temperature, the fan assembly 1 operates, thereby achieving forced air-cooling heat dissipation. This heat dissipation condition is generally applicable to the high-speed heavy-load condition of the electro-hydraulic power device, but is not limited thereto. In a state where the temperature of the motor 10 is not higher than the preset maximum temperature, the fan assembly 1 does not operate. At this time, the electro-hydraulic power device dissipates heat through natural convection at both axial ends of the draft tube 2 (or as well as the first air-cooling channel, the second air-cooling channel 18, and the plurality of heat dissipation holes on the draft tube 2). This heat dissipation condition is generally applicable to the normal condition (i.e., the low-speed light-load condition) of the electro-hydraulic power device, but is not limited thereto.

[0069] As can be seen from the above examples, by providing a temperature sensor in the present application to determine the start and stop timing of the fan assembly 1, it can effectively ensure that the motor 10 and the hydraulic components including the hydraulic pump 12 of the electro-hydraulic power device always operate in an efficient temperature range under different working conditions. Moreover, the fan assembly 1 does not need to operate all the time, which is beneficial to saving energy consumption and reducing the use cost.

[0070] In some embodiments, referring to Figure 2 , at least a part of the first heat sink 15 is disposed on the outer peripheral wall of the housing assembly (such as the outer peripheral wall of the third housing 9) and is located within the second air-cooling channel 18. Thus, when the fan assembly 1 operates, the heat dissipation air flow passing through the second air-cooling channel 18 can quickly carry out the heat dissipated by the first heat sink 15 outside the draft tube 2, thereby improving the heat dissipation efficiency of the first heat sink 15.

[0071] In some embodiments, referring to Figure 1 , at least a part of the second heat sink 3 is disposed on the axial end wall of the housing assembly (such as the axial end wall of the second housing 17) and within the first air-cooling channel. Thus, when the fan assembly 1 operates, the heat dissipation air flow passing through the first air-cooling channel can quickly carry out the heat dissipated by the second heat sink 3 outside the draft tube 2, thereby improving the heat dissipation efficiency of the second heat sink 3.

[0072] In some embodiments, referring to Figure 4 , the first heat sink 15 includes a wavy heat sink provided on the outer peripheral wall of the housing assembly (such as the outer peripheral wall of the third housing 9); and / or, referring to Figure 5 , the second heat sink 3 includes a spiral heat sink provided on the axial end wall of the housing assembly (such as the axial end wall of the second housing 17).

[0073] Both the wavy heat sink and the spiral heat sink are beneficial to further increase the heat dissipation area. And as mentioned above, the parameters (quantity, arrangement area, etc.) of the wavy heat sink and the spiral heat sink can be matched and designed according to the power of the electro-hydrodynamic device, so that the electro-hydrodynamic device can work in the high-efficiency temperature range only by natural convection without operating the enhanced heat dissipation module under normal working conditions (i.e., low-speed and light-load conditions).

[0074] It should be noted that the first heat sink 15 and the second heat sink 3 can also adopt different types of heat sinks, not limited to the above-mentioned wavy heat sink and spiral heat sink.

[0075] In some embodiments, the enhanced heat dissipation module may include a liquid cooling module (such as a water cooling module, an oil cooling module, etc.). During use, the oil in the heat dissipation oil chamber 16 can be introduced into the liquid cooling module for heat exchange and cooling, so as to achieve the heat dissipation of the heat dissipation oil chamber 16. In addition, the first heat sink 15 and / or the second heat sink 3 can also be placed inside the liquid cooling module for heat exchange and cooling, so as to achieve the heat dissipation of the first heat sink 15 and / or the second heat sink 3.

[0076] In some embodiments, the electro-hydrodynamic device may include a boosting assembly 13 embedded in the housing assembly (such as embedded in the first housing 8) and used to boost the hydraulic oil in the heat dissipation oil chamber 16.

[0077] For example, referring to Figure 2 , there may be a plurality of the boosting assemblies 13, and the plurality of boosting assemblies 13 may be sequentially arranged at intervals along the circumferential direction of the first housing 8.

[0078] For another example, the pressure boosting assembly 13 may include a limit plug 131, a piston 132, a spring 133, and a sealing ring 134. Among them, the piston 132 is slidably disposed in the fitting groove of the first housing 8, and the sealing ring 134 is sleeved on the outer peripheral wall of the piston 132 so that oil cannot flow between the two fitting groove regions on the axial two sides of the piston 132. The limit plug 131 is fixed at the axial opening of the fitting groove of the first housing 8 to prevent the piston 132 from disengaging from the fitting groove, and the limit plug 131 is provided with a through hole communicating the fitting groove with the heat dissipation oil chamber 16. The two axial ends of the spring 133 are respectively connected to the piston 132 and the bottom wall of the fitting groove, and the hydraulic oil in the heat dissipation oil chamber 16 can apply oil pressure on the piston 132 through the through hole of the limit plug 131 and keep the spring 133 in a compressed state. When the oil pressure in the heat dissipation oil chamber 16 decreases, the elastic restoring force of the spring 133 can drive the piston 132 to move toward the axial opening of the fitting groove, thereby boosting the pressure of the heat dissipation oil chamber 16.

[0079] It should be noted that the quantity, size parameters, structural composition, etc. of the pressure boosting assembly 13 can be determined according to the working parameters of the hydraulic system, and are not limited to the above-listed embodiments.

[0080] By providing the pressure boosting assembly 13, when the motor pump operates under high-speed conditions, the oil pressure supplied from the heat dissipation oil chamber 16 to the inlet of the hydraulic pump 12 can be ensured to be stable, avoiding phenomena such as cavitation, vibration noise, and efficiency reduction due to too small oil pressure at the inlet of the hydraulic pump 12. It can effectively improve the suction performance of the hydraulic pump 12 under high-speed conditions, so that the hydraulic pump 12 can stably operate at a higher working speed, broaden the flow output range of the hydraulic pump 12, improve the pump control speed regulation ability of the electro-hydraulic power device of the present application, and when the electro-hydraulic power device of the present application is applied to new energy equipment, it is of great significance for improving the endurance of the new energy equipment.

[0081] In some embodiments, the electro-hydraulic power device may include an integrated valve block 14 connected to one axial end of the housing assembly (for example, the integrated valve block 14 and the second housing 17 are respectively connected to the two axial ends of the first housing 8), and the inlet of the integrated valve block 14 is communicated with the outlet of the hydraulic pump 12. The outlet of the integrated valve block 14 can be used to connect hydraulic components such as valves and hydraulic actuators in the hydraulic system. In addition, different check valves, relief valves, reversing valves, etc. can be integrated inside the integrated valve block 14 according to the functional requirements and working parameters of the electro-hydraulic power device, and these valve components are connected through the flow channels formed inside the integrated valve block 14, which can completely eliminate the hydraulic pipelines between the valve components in the electro-hydraulic power device, so that the valve components are all connected without pipes, thereby reducing the pressure loss along the way, improving the integration degree and power density of the electro-hydraulic power device, and making the electro-hydraulic power device more applicable to working equipment such as new energy equipment.

[0082] In some embodiments, referring to Figure 6 , a housing oil inlet passage 83 and a housing oil outlet passage 84 are formed in the housing assembly (for example, both the housing oil inlet passage 83 and the housing oil outlet passage 84 can be formed in the first housing 8). At this time, the oil chamber outlet of the heat dissipation oil chamber 16, the housing oil inlet passage 83, and the oil inlet of the hydraulic pump 12 are connected in sequence, and the oil outlet of the hydraulic pump 12, the housing oil outlet passage 84, and the oil inlet of the integrated valve block 14 are connected in sequence. With such a setting, there is no need to connect the heat dissipation oil chamber 16 and the hydraulic pump 12, and between the hydraulic pump 12 and the integrated valve block 14 with hydraulic pipelines. And according to the foregoing, the integrated valve block 14 itself does not contain hydraulic pipelines either. Therefore, for the hydraulic oil circuit in the electro-hydraulic power device, the use of hydraulic pipelines is completely eliminated, which can greatly reduce the along-way pressure loss, greatly improve the integration degree and power density of the electro-hydraulic power device, and further improve the applicability of the electro-hydraulic power device to operating equipment such as new energy equipment.

[0083] In some embodiments, the motor pump is further provided with a power shaft 11. At this time, both the motor 10 (the rotor thereof) and the hydraulic pump 12 are sleeved on the power shaft 11. When the motor driver 4 drives the motor 10 to operate, the rotor of the motor 10 drives the power shaft 11 fixed thereto to rotate, and the power shaft 11 can drive the hydraulic pump 12 to operate, so as to realize the linkage of the motor 10 and the hydraulic pump 12 by using the same power shaft 11.

[0084] Since the motor 10 and the hydraulic pump 12 adopt a coaxial and co-shell design (that is, sharing the power shaft 11 and sharing the housing assembly), in addition to improving the structural compactness of the electro-hydraulic power device, it can also effectively solve the problems existing in the existing motor pump when connecting the motor shaft and the pump shaft with a coupling, such as being prone to causing additional lateral forces, resulting in high vibration noise and serious eccentric wear. And since there is no need to install and cooperate the motor shaft and the pump shaft, the present application can reduce the processing and assembly precision requirements for the electro-hydraulic power device, making the electro-hydraulic power device more practical.

[0085] In some embodiments, in order to support the power shaft 11, referring to Figure 1 , the motor pump may further be provided with a bearing end cover 5, a housing end cover 6, and a bearing 7. Among them, the housing end cover 6 can be fixed to one axial end of the first housing 8, the bearing end cover 5 is installed on the housing end cover 6, and the bearing 7 is installed on the bearing end cover 5. At this time, one end of the power shaft 11 is connected to the hydraulic pump 12 and the other end passes through the bearing 7, so as to realize the stable support of the power shaft 11.

[0086] In summary, the electro-hydraulic power device provided by the present application has technical advantages such as high power density, high heat dissipation efficiency, and high rotational speed compared with the existing integrated electric drive hydraulic power source.

[0087] The second exemplary embodiment of the present application further provides a working device, which can be a new energy device, including but not limited to new energy vehicles, new energy vehicle cranes, new energy truck-mounted cranes, new energy mixer trucks, new energy pump trucks, new energy fire trucks, new energy road construction vehicles, new energy sanitation vehicles, etc. In addition, the new energy device further includes the above-mentioned electro-hydraulic power device and a power battery (such as a lithium battery, a hydrogen fuel cell, etc.) for supplying power to the electro-hydraulic power device.

[0088] Of course, the working device of the present application can also be a fuel-powered device, including vehicles, vehicle cranes, truck-mounted cranes, mixer trucks, pump trucks, fire trucks, road construction vehicles, sanitation vehicles, etc. driven by a fuel engine, and is not limited thereto. In addition, the fuel-powered device further includes the above-mentioned electro-hydraulic power device and a generator. When the fuel engine operates, it can drive the generator to operate, and then the generator can supply power to the motor 10 in the electro-hydraulic power device.

[0089] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0090] In the present application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0091] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0092] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. An electro-hydraulic power device, characterized in that, Comprising: A housing assembly; A motor pump, disposed within the housing assembly and including a motor (10), a motor driver (4), and a hydraulic pump (12) driven by the motor (10); A heat dissipation assembly, provided with a heat dissipation oil chamber (16), a first heat sink (15), a second heat sink (3), and a strengthened heat dissipation module. The heat dissipation oil chamber (16) is formed within the housing assembly and can dissipate heat for the motor (10) and the hydraulic pump (12). The first heat sink (15) is connected to the housing assembly and can dissipate heat for the heat dissipation oil chamber (16). The second heat sink (3) is connected to the housing assembly and can dissipate heat for the motor driver (4). The strengthened heat dissipation module is connected to the housing assembly and can at least dissipate heat for the heat dissipation oil chamber (16).

2. The electro-hydrodynamic device according to claim 1, characterized in that, The strengthened heat dissipation module includes an air-cooling module, and the air-cooling module is provided with a fan assembly (1) and a flow guide cylinder (2). The fan assembly (1) is disposed outside one axial end of the housing assembly, and the flow guide cylinder (2) is sleeved outside the peripheral wall of the housing assembly; Wherein, a first air-cooling channel is formed between the air outlet end of the fan assembly (1), one axial end of the housing assembly facing the fan assembly (1), and the flow guide cylinder (2), and a second air-cooling channel (18) communicating with the first air-cooling channel is formed between the flow guide cylinder (2) and the housing assembly.

3. The electro-hydrodynamic device according to claim 2, characterized in that, The heat dissipation oil chamber (16) is formed as an annular oil chamber surrounding the motor (10) and the hydraulic pump (12), and the second air-cooling channel (18) is formed as an annular air duct surrounding the annular oil chamber.

4. The electro-hydrodynamic device according to claim 2, characterized in that, A plurality of heat dissipation holes are formed on the peripheral wall of the flow guide cylinder (2), and both the first air-cooling channel and the second air-cooling channel (18) communicate with the plurality of heat dissipation holes.

5. The electro-hydrodynamic device according to claim 2, characterized in that, The axial two ends of the flow guide cylinder (2) are respectively provided with a first connection structure and a second connection structure. The fan assembly (1) is connected to the first connection structure, and the housing assembly is connected to the second connection structure.

6. The electro-hydrodynamic device according to claim 2, characterized in that, The electro-hydraulic power device further includes a temperature sensor disposed within the housing assembly and used for detecting the temperature of the motor (10). The fan assembly (1) is communicatively connected to the temperature sensor. In a state where the temperature of the motor (10) is higher than a preset maximum temperature, the fan assembly (1) operates.

7. The electro-hydrodynamic device according to claim 2, characterized in that, At least a part of the first heat sink (15) is disposed on the outer peripheral wall of the housing assembly and within the second air-cooling channel (18); and / or, at least a part of the second heat sink (3) is disposed on the axial end wall of the housing assembly and within the first air-cooling channel.

8. The electro-hydrodynamic device according to claim 1, characterized in that, The first heat sink (15) includes a wavy heat sink disposed on the outer peripheral wall of the housing assembly; and / or, the second heat sink (3) includes a spiral heat sink disposed on the axial end wall of the housing assembly.

9. The electro-hydrodynamic device according to claim 1, characterized in that, The electro-hydraulic power device further includes a pressurizing assembly (13) embedded in the housing assembly and used for pressurizing the hydraulic oil in the heat dissipation oil chamber (16).

10. The electro-hydrodynamic device according to claim 1, wherein The electro-hydraulic power device further includes an integrated valve block (14) connected to an axial end of the housing assembly, and an oil inlet of the integrated valve block (14) is communicated with an oil outlet of the hydraulic pump (12).

11. The electro-hydrodynamic device according to claim 10, characterized in that, A housing oil inlet passage (83) and a housing oil outlet passage (84) are formed in the housing assembly. An oil cavity outlet of the heat dissipation oil cavity (16), the housing oil inlet passage (83), and an oil inlet of the hydraulic pump (12) are communicated in sequence. An oil outlet of the hydraulic pump (12), the housing oil outlet passage (84), and an oil inlet of the integrated valve block (14) are communicated in sequence.

12. The electro-hydrodynamic device according to any one of claims 1 to 11, characterized in that, The housing assembly is provided with a first housing (8), a second housing (17), and a third housing (9). The first housing (8) internally houses the motor (10) and the hydraulic pump (12). The second housing (17) is connected to an axial end of the first housing (8) and internally houses the motor driver (4). The third housing (9) is sleeved outside the peripheral wall of the first housing (8). Wherein, the heat dissipation oil cavity (16) is formed between the first housing (8) and the third housing (9). The first heat sink (15) is arranged on an outer wall of the third housing (9), and the second heat sink (3) is arranged on an outer wall of the second housing (17).

13. Operating device, characterized in that, Comprising the electro-hydraulic power device according to any one of claims 1 to 12.

Images