Emergency steering pump module, power-assisted steering system and new energy engineering vehicle

Abstract

The invention relates to the field of new energy engineering vehicles, and discloses an emergency steering pump module, a power-assisted steering system and a new energy engineering vehicle, the emergency steering pump module comprises a high-speed pump, a high-speed motor and a power battery, the high-speed motor is in driving connection with the high-speed pump, and the power battery is electrically connected with the high-speed motor. The emergency steering pump module can be applied to a power-assisted steering system and can replace a common steering oil pump to supply oil to a power-assisted oil cylinder under the condition that the common steering oil pump fails, the emergency steering pump module can operate independently, engine driving is not needed, and therefore the emergency steering pump module is convenient to use. The space limitation that a traditional emergency steering pump must take off power from mechanical power sources such as a transfer case power take-off port or an engine power take-off port is eliminated, the emergency steering pump module can be flexibly arranged at a proper position, and therefore arrangement of a power-assisted steering system is effectively simplified. In addition, the high-speed pump and the high-speed motor are small in size, so that the emergency steering pump module is compact in overall structure and small in occupied space.

Description

Technical Field

[0001] The present invention belongs to the field of new energy engineering vehicles, and in particular, relates to an emergency steering pump module, a steering assist system and a new energy engineering vehicle. Background Art

[0002] The power steering system is an important component of new energy engineering vehicles. The power steering system is a system used to assist the driver in steering, which mainly includes a power steering cylinder for driving tire steering and a common steering oil pump for driving the telescopic action of the power steering cylinder. In addition, in order to improve the reliability of power steering, an emergency steering oil pump is generally provided. In the event of failure of the common steering oil pump, the emergency steering oil pump replaces the common steering oil pump to supply oil to the power steering cylinder. However, the existing emergency steering oil pump is driven by the engine, and the emergency steering oil pump must be connected to the power take-off port of the transfer case or the engine. In this way, the emergency steering oil pump must be arranged adjacent to the transfer case or the engine, and the installation position is not flexible. The installation position and installation space are greatly restricted, resulting in a more complicated layout of the power steering system. For example, the distance between the emergency steering oil pump and the power steering cylinder is relatively far, which will result in more connecting pipes between the two and a more complicated layout. Summary of the invention

[0003] In view of the above-mentioned deficiencies or defects in the prior art, the present invention provides an emergency steering pump module, a steering assist system and a new energy engineering vehicle, aiming to solve the technical problem that the installation position and installation space of the emergency steering oil pump in the steering assist system are limited, resulting in a more complicated layout of the steering assist system.

[0004] To achieve the above object, the present invention provides an emergency steering pump module, comprising:

[0005] High-speed pumps;

[0006] A high-speed motor, drivingly connected to the high-speed pump;

[0007] A power battery is electrically connected to the high-speed motor.

[0008] Optionally, the high-speed pump is a bidirectional pump, and the high-speed motor is a bidirectional motor.

[0009] Optionally, the emergency steering pump module also includes two first one-way valves and an accumulator, the oil inlet ends of the two first one-way valves are respectively connected to the accumulator, and the oil outlet ends of the two first one-way valves are respectively connected to the first oil port and the second oil port of the high-speed pump.

[0010] Optionally, the high-speed pump is a variable displacement pump, and / or the high-speed motor is a speed-regulating motor.

[0011] The present invention also provides a steering assist system, comprising:

[0012] A steering axle power-assisting unit, comprising a first power-assisting oil cylinder and a second power-assisting oil cylinder;

[0013] In the above-mentioned emergency steering pump module, the high-speed pump is connected to the first power-assisted oil cylinder and the second power-assisted oil cylinder respectively, and can be driven by the high-speed motor to operate to drive the first power-assisted oil cylinder and the second power-assisted oil cylinder to extend and retract.

[0014] Optionally, the power steering system further comprises a hydraulic oil source and a common steering oil pump, and an oil inlet of the common steering oil pump is connected to the hydraulic oil source;

[0015] The steering axle power-assisting unit further comprises an electrically controlled reversing valve, wherein a first working oil port of the electrically controlled reversing valve is respectively connected to a rod chamber of the first power-assisting oil cylinder and a rodless chamber of the second power-assisting oil cylinder, a second working oil port of the electrically controlled reversing valve is respectively connected to a rodless chamber of the first power-assisting oil cylinder and a rod chamber of the second power-assisting oil cylinder, and an oil return port and an oil inlet of the electrically controlled reversing valve are respectively connected to an oil outlet of the hydraulic oil source and the common steering oil pump;

[0016] The oil inlet of the high-speed pump is connected to the hydraulic oil source, and the oil outlet of the high-speed pump is connected to the oil inlet of the electric-controlled reversing valve.

[0017] Optionally, a second one-way valve arranged along the oil inlet direction is connected between the oil outlet of the common steering oil pump and the oil inlet of the electronically controlled reversing valve, and between the oil outlet of the high-speed pump and the oil inlet of the electronically controlled reversing valve.

[0018] Optionally, the steering assist system includes multiple steering axle assist units, the oil outlet of the common steering oil pump is respectively connected to the oil inlet of the electronically controlled reversing valve of the multiple steering axle assist units, and the oil outlet of the high-speed pump is respectively connected to the oil inlet of the electronically controlled reversing valve of the multiple steering axle assist units.

[0019] Optionally, the power steering system further comprises a hydraulic oil source and a common steering oil pump, and an oil inlet of the common steering oil pump is connected to the hydraulic oil source;

[0020] The steering axle power-assisting unit further comprises an electrically controlled reversing valve, wherein a first working oil port of the electrically controlled reversing valve is respectively connected to a rod chamber of the first power-assisting oil cylinder and a rodless chamber of the second power-assisting oil cylinder, a second working oil port of the electrically controlled reversing valve is respectively connected to a rodless chamber of the first power-assisting oil cylinder and a rod chamber of the second power-assisting oil cylinder, and an oil return port and an oil inlet of the electrically controlled reversing valve are respectively connected to an oil outlet of the hydraulic oil source and the common steering oil pump;

[0021] The high-speed motor is a bidirectional motor, and the high-speed pump is a bidirectional pump. The first oil port of the high-speed pump is respectively connected to the rod chamber of the first power-assisted oil cylinder and the rodless chamber of the second power-assisted oil cylinder, and the second oil port of the high-speed pump is respectively connected to the rodless chamber of the first power-assisted oil cylinder and the rod chamber of the second power-assisted oil cylinder.

[0022] Optionally, the emergency steering pump module also includes two first one-way valves and an accumulator, the oil inlet ends of the two first one-way valves are respectively connected to the accumulator, and the oil outlet ends of the two first one-way valves are respectively connected to the first oil port and the second oil port of the high-speed pump.

[0023] Optionally, the steering assist system includes a plurality of the steering axle assist units and a plurality of the emergency steering pump modules, and one steering axle assist unit is correspondingly configured with one emergency steering pump module.

[0024] The present invention also provides a new energy engineering vehicle, comprising the above-mentioned power steering system.

[0025] Through the above technical scheme, the emergency steering pump module of the present invention can be applied to the power steering system, and can replace the common steering oil pump to supply oil to the power cylinder when the common steering oil pump fails, wherein the emergency steering pump module includes a high-speed pump, a high-speed motor and a power battery, the power battery supplies power to the high-speed motor, and the high-speed motor is used to drive the high-speed pump to operate, that is, the emergency steering pump module can operate independently without the need for engine drive, so that the space limitation that the traditional emergency steering pump must take power from a mechanical power source such as a transfer case power take-off port or an engine power take-off port is eliminated, and the emergency steering pump module can be flexibly arranged in a suitable position, such as a position adjacent to the power cylinder, so that the layout of the power steering system is effectively simplified, such as reducing the connection pipeline. In addition, the volume of the high-speed pump is much smaller than that of the traditional ordinary oil pump, and at the same time, the volume of the high-speed motor is also much smaller than that of the traditional ordinary motor. So, under the premise of ensuring the oil supply capacity of the emergency steering pump module, the overall structure of the emergency steering pump module can be made compact and small in space.

[0026] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0028] In the attached picture:

[0029] Figure 1 It is a structural schematic diagram of an emergency steering pump module in an embodiment of the present invention;

[0030] Figure 2 It is a structural schematic diagram of an emergency steering pump module in another embodiment of the present invention;

[0031] Figure 3 A schematic structural diagram of a power steering system in one embodiment of the present invention;

[0032] Figure 4 for Figure 3 A schematic diagram of the structure of the power steering system applied to a multi-axle steering vehicle;

[0033] Figure 5 A schematic structural diagram of a power steering system in another embodiment of the present invention;

[0034] Figure 6 for Figure 5 Schematic diagram of the structure of the power steering system applied to a multi-axle steering vehicle.

[0035] Description of reference numerals:

[0036] 1 Emergency steering pump module

[0037] 11 High speed pump 12 High speed motor

[0038] 13 Power battery 14 First check valve

[0039] 15 Accumulator

[0040] 2 Steering axle power assist unit

[0041] 21 First booster cylinder 22 Second booster cylinder

[0042] 23 Electric control reversing valve

[0043] 3 Hydraulic oil source

[0044] 4 Commonly used steering oil pumps

[0045] 5 Second check valve DETAILED DESCRIPTION

[0046] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0048] In the present invention, unless otherwise specified, the directions or positional relationships indicated by directional words such as "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0049] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0050] The present invention firstly provides an emergency steering pump module.

[0051] In one embodiment, referring to the attached Figure 1 and attached Figure 2 As shown, the emergency steering pump module includes:

[0052] High speed pump 11;

[0053] A high-speed motor 12 is drivingly connected to the high-speed pump 11;

[0054] The power battery 13 is electrically connected to the high-speed motor 12 .

[0055] The emergency steering pump module of this embodiment can be applied to the power steering system, and can replace the common steering oil pump to supply oil to the power cylinder when the common steering oil pump fails. The emergency steering pump module 1 includes a high-speed pump 11, a high-speed motor 12 and a power battery 13. The power battery 13 supplies power to the high-speed motor 12, and the high-speed motor 12 is used to drive the high-speed pump 11 to operate. That is, the emergency steering pump module 1 can operate independently without the need for engine drive. Such an arrangement eliminates the spatial limitation that the traditional emergency steering pump must take power from a mechanical power source such as a transfer case power take-off port or an engine power take-off port. The emergency steering pump module 1 can be flexibly arranged in a suitable position, such as a position adjacent to the power cylinder. In this way, the layout of the power steering system can be effectively simplified, such as reducing connecting pipelines.

[0056] In addition, according to the formula q t =nV, where q t is the flow rate of the hydraulic pump, n is the speed of the hydraulic pump, and V is the displacement of the hydraulic pump. It can be seen that when the flow rate q of the hydraulic pump t Under the premise of unchanged, by increasing the rotation speed n of the hydraulic pump, the displacement V of the hydraulic pump can be reduced, so that the volume of the hydraulic pump can be reduced. In other words, the hydraulic pump adopts a high-speed pump 11 with a higher rotation speed, and the volume can be designed to be much smaller than the traditional ordinary hydraulic pump.

[0057] According to the formula P mec =C mec D 2 l′n syn , where P mec is the motor output mechanical power, D is the motor stator inner diameter, l' is the equivalent axial stack length, n syn is the motor speed, we can know that when the motor outputs mechanical power P mec Under the premise of unchanged, by increasing the motor speed n syn , the volume of the motor can be reduced to D 2 l' is reduced, in other words, the motor adopts a high-speed motor 12 with a relatively high rotation speed, and the volume can be designed to be much smaller than that of a conventional ordinary motor.

[0058] That is to say, in this embodiment, by using a high-speed pump 11 for the hydraulic pump and a high-speed motor 12 for the motor, the emergency steering pump module can be designed to be more compact in structure, smaller in overall size, and occupy less space while meeting the flow output requirements.

[0059] In addition, in the existing power steering system, when the vehicle starts, under the condition that the conventional steering oil pump operates normally, the traditional emergency steering pump is connected to the engine and is driven to operate continuously when the engine starts, resulting in large energy loss. However, the emergency steering pump module 1 of this embodiment operates independently, so when emergency power assistance is not needed, the high-speed motor 12 can be shut down, that is, the emergency steering pump module 1 can be shut down when the vehicle starts, thereby avoiding waste of energy resources.

[0060] In one embodiment, referring to the attached Figure 2 As shown, the high-speed pump 11 is a bidirectional pump, and the high-speed motor 12 is a bidirectional motor. With such a configuration, the emergency steering pump module can reversibly pump the hydraulic oil. In actual application, the two oil ports of the high-speed pump 11 can be directly connected to the two power-assisting cylinders arranged on the same axle. During the steering of the axle, the piston of one power-assisting cylinder needs to be extended, and the piston of the other power-assisting cylinder needs to be retracted. When the common steering oil pump fails, the high-speed motor 12 is started, and the high-speed pump 11 is operated to pump the hydraulic oil in the rodless chamber of the power-assisting cylinder that needs to be retracted and the hydraulic oil in the rod chamber of the power-assisting cylinder that needs to be extended to the rod chamber of the power-assisting cylinder that needs to be retracted and the rodless chamber of the power-assisting cylinder that needs to be extended, so that the piston of the power-assisting cylinder that needs to be retracted is retracted, and the piston of the power-assisting cylinder that needs to be extended is extended.

[0061] That is to say, the emergency steering pump module 1 of this embodiment can be directly connected to the power-assisted oil cylinder, and the flow direction of the hydraulic oil can be reversed without connecting a reversing valve in the middle, thereby realizing the telescopic action of the power-assisted oil cylinder. Such a setting can greatly simplify the connecting pipeline between the emergency steering pump module 1 and the power-assisted oil cylinder and reduce the pipeline layout cost.

[0062] Further, see Attachment Figure 2 As shown, the emergency steering pump module 1 further includes two first one-way valves 14 and an accumulator 15. The oil inlet ends of the two first one-way valves 14 are respectively connected to the accumulator 15, and the oil outlet ends of the two first one-way valves 14 are respectively connected to the first oil port and the second oil port of the high-speed pump 11. With such a configuration, the accumulator 15 can play the role of replenishing oil, that is, when the hydraulic oil circuit formed by the high-speed pump 11 and the booster oil cylinder leaks, the accumulator 15 can replenish oil in time to ensure the stability of the oil pressure, thus effectively improving the reliability of the emergency steering pump module 1 in driving the booster oil cylinder in an emergency.

[0063] In one embodiment, the high-speed pump 11 is a variable displacement pump, and / or the high-speed motor 12 is a speed-regulating motor. This arrangement allows the hydraulic oil output flow of the emergency steering pump module 1 to be adjustable, thereby achieving adjustable extension and retraction speed of the booster cylinder, and then achieving adjustable steering speed.

[0064] Specifically, the emergency steering pump module 1 can be in various combination forms, for example, the high-speed pump 11 is a variable pump, and the high-speed motor 12 is a fixed-speed motor; or, the high-speed pump 11 is a fixed-displacement pump, and the high-speed motor 12 is a speed-regulating motor; or, the high-speed pump 11 is a variable pump, and the high-speed motor 12 is a speed-regulating motor.

[0065] The present invention first provides a power steering system.

[0066] In one embodiment, referring to the attached Figure 3 To Attachment Figure 6 As shown, the power steering system includes:

[0067] The steering axle power-assisting unit 2 comprises a first power-assisting oil cylinder 21 and a second power-assisting oil cylinder 22;

[0068] In the above-mentioned emergency steering pump module 1 , the high-speed pump 11 is connected to the first power-assisted oil cylinder 21 and the second power-assisted oil cylinder 22 respectively, and can be driven by the high-speed motor 12 to drive the first power-assisted oil cylinder 21 and the second power-assisted oil cylinder 22 to extend and retract.

[0069] It should be noted that the principle and structure of achieving steering of a power-assisted steering axle by means of a power-assisted oil cylinder are well known to those skilled in the art, and therefore, will not be described in detail here.

[0070] It can be understood that when the normal steering oil pump of the power steering system fails, the emergency steering pump module 1 can replace the normal steering oil pump to drive the first power cylinder 21 and the second power cylinder 22 of the steering axle power unit 2 to extend and retract, thereby achieving power steering.

[0071] In actual application, a controller for controlling the emergency steering pump module 1 can be set. When the controller detects an abnormality in the power steering system, such as too low system oil pressure, small hydraulic oil flow, and steering speed and angle of the steering axle deviating from the preset range value during steering, it indicates that the common steering oil pump has failed. At this time, the high-speed motor 12 can be controlled to start, and the high-speed pump 11 can be started and operated. In addition, during the operation of the emergency steering pump module 1, the hydraulic oil output flow of the emergency steering pump module 1 can be controlled according to the steering speed and angle requirements of the steering axle.

[0072] In one embodiment, referring to the attached Figure 3 As shown, the power steering system also includes a hydraulic oil source 3 and a common steering oil pump 4, and the oil inlet of the common steering oil pump 4 is connected to the hydraulic oil source 3;

[0073] The steering axle power-assisting unit 2 further includes an electrically controlled reversing valve 23, a first working oil port of the electrically controlled reversing valve 23 is respectively connected to the rod chamber of the first power-assisting oil cylinder 21 and the rodless chamber of the second power-assisting oil cylinder 22, a second working oil port of the electrically controlled reversing valve 23 is respectively connected to the rodless chamber of the first power-assisting oil cylinder 21 and the rod chamber of the second power-assisting oil cylinder 22, an oil return port and an oil inlet of the electrically controlled reversing valve 23 are respectively connected to the oil outlet of the hydraulic oil source 3 and the common steering oil pump 4;

[0074] The oil inlet of the high-speed pump 11 is connected to the hydraulic oil source 3 , and the oil outlet of the high-speed pump 11 is connected to the oil inlet of the electric-controlled reversing valve 23 .

[0075] It can be understood that the power steering system of this embodiment is an electro-hydraulic power steering system. Under normal circumstances, the common steering oil pump 4 supplies oil to the first power steering cylinder 21 and the second power steering cylinder 22, and the extension and retraction of the first power steering cylinder 21 and the second power steering cylinder 22 are achieved by reversing the electronically controlled reversing valve 23. In the event that the common steering oil pump 4 fails, the emergency steering pump module 1 supplies oil to the first power steering cylinder 21 and the second power steering cylinder 22.

[0076] Specifically, the hydraulic oil source 3 may be a hydraulic oil tank or other hydraulic systems.

[0077] Furthermore, a second one-way valve 5 arranged along the oil inlet direction is connected between the oil outlet of the common steering oil pump 4 and the oil inlet of the electric control reversing valve 23, and between the oil outlet of the high-speed pump 11 and the oil inlet of the electric control reversing valve 23. With such arrangement, when the common steering oil pump 4 or the high-speed pump 11 has internal leakage, the second one-way valve 5 can prevent the hydraulic oil from flowing back, maintain the oil pressure of the steering power system, and improve safety.

[0078] Further, see Attachment Figure 4As shown, the power steering system includes multiple steering axle power-assisting units 2, the oil outlets of the common steering oil pump 4 are respectively connected to the oil inlets of the electronically controlled reversing valves 23 of the multiple steering axle power-assisting units 2, and the oil outlets of the high-speed pump 11 are respectively connected to the oil inlets of the electronically controlled reversing valves 23 of the multiple steering axle power-assisting units 2.

[0079] It can be understood that the multiple steering axle power-assisting units 2 are respectively used for steering assistance of multiple steering axles. In this way, the steering assistance system of this embodiment can be used for multi-axle steering vehicles, such as wheeled cranes, multi-axle emergency power platform vehicles, etc.

[0080] In this embodiment, an emergency steering pump module 1 is used to supply oil to multiple steering axle power-assisting units 2. The hydraulic oil output flow of the emergency steering pump module 1 can be controlled according to the sum of the steering speeds and angle requirements of the multiple steering axles, and then the multiple steering axle power-assisting units 2 control the opening of their respective electronically controlled reversing valves 23 according to their respective requirements.

[0081] In another embodiment, referring to the attached Figure 5 As shown, the power steering system also includes a hydraulic oil source 3 and a common steering oil pump 4, and the oil inlet of the common steering oil pump 4 is connected to the hydraulic oil source 3;

[0082] The steering axle power-assisting unit 2 further includes an electrically controlled reversing valve 23, a first working oil port of the electrically controlled reversing valve 23 is respectively connected to the rod chamber of the first power-assisting oil cylinder 21 and the rodless chamber of the second power-assisting oil cylinder 22, a second working oil port of the electrically controlled reversing valve 23 is respectively connected to the rodless chamber of the first power-assisting oil cylinder 21 and the rod chamber of the second power-assisting oil cylinder 22, an oil return port and an oil inlet of the electrically controlled reversing valve 23 are respectively connected to the oil outlet of the hydraulic oil source 3 and the common steering oil pump 4;

[0083] The high-speed motor 12 is a bidirectional motor, and the high-speed pump 11 is a bidirectional pump. The first oil port of the high-speed pump 11 is respectively connected to the rod chamber of the first power-assisted cylinder 21 and the rodless chamber of the second power-assisted cylinder 22, and the second oil port of the high-speed pump 11 is respectively connected to the rodless chamber of the first power-assisted cylinder 21 and the rod chamber of the second power-assisted cylinder 22.

[0084] It can be understood that the power steering system of this embodiment is also an electro-hydraulic power steering system.

[0085] In this embodiment, the emergency steering pump module 1 is directly connected to the first power-assisting oil cylinder 21 and the second power-assisting oil cylinder 22 of the steering axle power-assisting unit 2. When the common steering oil pump 4 fails, the pumping and reversing functions of the high-speed pump 11 form a hydraulic circuit between the first power-assisting oil cylinder 21 and the second power-assisting oil cylinder 22, so as to realize the extension and retraction of the first power-assisting oil cylinder 21 and the second power-assisting oil cylinder 22. That is to say, in the steering power-assisting system of this embodiment, when the electronically controlled reversing valve 23 fails, the emergency steering pump module 1 can also ensure the normal operation of the first power-assisting oil cylinder 21 and the second power-assisting oil cylinder 22, and ensure the normal power-assisting steering of the steering axle, thereby greatly improving the reliability of the power-assisting steering.

[0086] Furthermore, the emergency steering pump module 1 further includes two first one-way valves 14 and an accumulator 15, the oil inlet ends of the two first one-way valves 14 are respectively connected to the accumulator 15, and the oil outlet ends of the two first one-way valves 14 are respectively connected to the first oil port and the second oil port of the high-speed pump 11. With such a configuration, when the high-speed pump 11 or the pipeline between the high-speed pump 11 and the power-assisting oil cylinder leaks, the accumulator 15 can replenish oil in time, maintain oil pressure stability for a period of time, and ensure the power-assisting steering function.

[0087] Further, see Attachment Figure 6 As shown, the power steering system includes a plurality of steering axle power steering units 2 and a plurality of emergency steering pump modules 1 , and one steering axle power steering unit 2 is correspondingly configured with one emergency steering pump module 1 .

[0088] It can be understood that the multiple steering axle power-assisting units 2 are respectively used for steering assistance of multiple steering axles. In this way, the steering assistance system of this embodiment can be used for multi-axle steering vehicles, such as wheeled cranes, multi-axle emergency power platform vehicles, etc.

[0089] One emergency steering pump module 1 is configured corresponding to one steering axle power assist unit 2. In this way, the steering speed and steering angle of each steering axle can be individually controlled by the corresponding emergency steering pump module 1, thereby effectively improving the control accuracy of each steering axle.

[0090] Specifically, the power batteries 13 of the multiple emergency steering pump modules 1 may be arranged separately or integratedly.

[0091] The present invention also provides a new energy engineering vehicle, comprising the above-mentioned power steering system.

[0092] Obviously, the new energy engineering vehicle also has the beneficial effects of the above-mentioned power steering system.

[0093] Specifically, the new energy engineering vehicle may be a new energy wheeled crane, a new energy emergency power platform vehicle, and the like.

[0094] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0095] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. 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, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0097] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An emergency steering pump module, characterized in that: include: High speed pump (11); A high-speed motor (12) drivingly connected to the high-speed pump (11); A power battery (13) is electrically connected to the high-speed motor (12).

2. The emergency steering pump module according to claim 2, characterized in that: The high-speed pump (11) is a bidirectional pump, and the high-speed motor (12) is a bidirectional motor.

3. The emergency steering pump module according to claim 3, characterized in that: The emergency steering pump module (1) further comprises two first one-way valves (14) and an accumulator (15), wherein the oil inlet ends of the two first one-way valves (14) are respectively connected to the accumulator (15), and the oil outlet ends of the two first one-way valves (14) are respectively connected to the first oil port and the second oil port of the high-speed pump (11).

4. The emergency steering pump module according to claim 1, characterized in that: The high-speed pump (11) is a variable displacement pump, and / or the high-speed motor (12) is a speed-regulating motor.

5. A power steering system, characterized in that: include: A steering axle power-assisting unit (2), comprising a first power-assisting oil cylinder (21) and a second power-assisting oil cylinder (22); According to the emergency steering pump module (1) according to any one of claims 1 to 4, the high-speed pump (11) is connected to the first power-assisting cylinder (21) and the second power-assisting cylinder (22), respectively, and can be driven by the high-speed motor (12) to drive the first power-assisting cylinder (21) and the second power-assisting cylinder (22) to extend and retract.

6. The power steering system according to claim 5, characterized in that: The power steering system further comprises a hydraulic oil source (3) and a common steering oil pump (4), wherein an oil inlet of the common steering oil pump (4) is connected to the hydraulic oil source (3); The steering axle power-assisting unit (2) further comprises an electrically controlled reversing valve (23), wherein a first working oil port of the electrically controlled reversing valve (23) is respectively connected to a rod chamber of the first power-assisting oil cylinder (21) and a rodless chamber of the second power-assisting oil cylinder (22), a second working oil port of the electrically controlled reversing valve (23) is respectively connected to a rodless chamber of the first power-assisting oil cylinder (21) and a rod chamber of the second power-assisting oil cylinder (22), and an oil return port and an oil inlet of the electrically controlled reversing valve (23) are respectively connected to an oil outlet of the hydraulic oil source (3) and the common steering oil pump (4); The oil inlet of the high-speed pump (11) is connected to the hydraulic oil source (3), and the oil outlet of the high-speed pump (11) is connected to the oil inlet of the electric-controlled reversing valve (23).

7. The power steering system according to claim 6, characterized in that: A second one-way valve (5) arranged along the oil inlet direction is respectively connected between the oil outlet of the common steering oil pump (4) and the oil inlet of the electric control reversing valve (23), and between the oil outlet of the high-speed pump (11) and the oil inlet of the electric control reversing valve (23).

8. The power steering system according to claim 6, characterized in that: The steering assist system comprises a plurality of steering axle assist units (2), the oil outlet of the common steering oil pump (4) being respectively connected to the oil inlet of the electronically controlled reversing valve (23) of the plurality of steering axle assist units (2), and the oil outlet of the high-speed pump (11) being respectively connected to the oil inlet of the electronically controlled reversing valve (23) of the plurality of steering axle assist units (2).

9. The power steering system according to claim 5, characterized in that: The power steering system further comprises a hydraulic oil source (3) and a common steering oil pump (4), wherein an oil inlet of the common steering oil pump (4) is connected to the hydraulic oil source (3); The steering axle power-assisting unit (2) further comprises an electrically controlled reversing valve (23), wherein a first working oil port of the electrically controlled reversing valve (23) is respectively connected to a rod chamber of the first power-assisting oil cylinder (21) and a rodless chamber of the second power-assisting oil cylinder (22), a second working oil port of the electrically controlled reversing valve (23) is respectively connected to a rodless chamber of the first power-assisting oil cylinder (21) and a rod chamber of the second power-assisting oil cylinder (22), and an oil return port and an oil inlet of the electrically controlled reversing valve (23) are respectively connected to an oil outlet of the hydraulic oil source (3) and the common steering oil pump (4); The high-speed motor (12) is a bidirectional motor, and the high-speed pump (11) is a bidirectional pump. The first oil port of the high-speed pump (11) is respectively connected to the rod chamber of the first power-assisted oil cylinder (21) and the rodless chamber of the second power-assisted oil cylinder (22), and the second oil port of the high-speed pump (11) is respectively connected to the rodless chamber of the first power-assisted oil cylinder (21) and the rod chamber of the second power-assisted oil cylinder (22).

10. The power steering system according to claim 9, characterized in that: The emergency steering pump module (1) further comprises two first one-way valves (14) and an accumulator (15), wherein the oil inlet ends of the two first one-way valves (14) are respectively connected to the accumulator (15), and the oil outlet ends of the two first one-way valves (14) are respectively connected to the first oil port and the second oil port of the high-speed pump (11).

11. The power steering system according to claim 9, characterized in that: The steering assist system comprises a plurality of steering axle assist units (2) and a plurality of emergency steering pump modules (1), and one steering axle assist unit (2) is correspondingly configured with one emergency steering pump module (1).

12. A new energy engineering vehicle, characterized in that: The invention comprises the power steering system according to any one of claims 5 to 11.

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