CN112172916A

CN112172916A - Steering pump and work vehicle

Info

Publication number: CN112172916A
Application number: CN202011246554.1A
Authority: CN
Inventors: 杨杰; 廖金涛; 易绍志
Original assignee: Sany Special Vehicle Co Ltd
Current assignee: Sany Special Vehicle Co Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-01-05

Abstract

The invention provides a steering pump and a work vehicle. The steering pump comprises a stator, a rotor and an energy-saving device. At least part of the rotor is disposed in the stator. The energy-saving device is used for pushing the stator to switch between the first position and the second position. When the stator is at the first position, the steering pump stops sucking and/or discharging oil, and when the stator is at the second position, the steering pump sucks and/or discharges oil. The stator is pushed to the first position by the energy-saving device, so that the steering pump stops sucking and/or discharging oil, the oil consumption of the steering pump in a parking or in-situ pumping state is reduced, and the energy-saving effect is achieved.

Description

Steering pump and work vehicle

Technical Field

The invention relates to the technical field of steering pumps, in particular to a steering pump and a working vehicle.

Background

The work vehicle in the related art needs to employ a steering pump to provide steering assist thereto. In order to achieve the effect of providing steering assist, the steering pump is then required to be fuel-consuming. In the related art, the steering pump is still in operation and consumes oil continuously during parking or performing work. This phenomenon causes unnecessary fuel consumption and waste.

Disclosure of Invention

The present invention is directed to solving at least one of the above problems.

To this end, a first object of the present invention is to provide a steering pump.

A second object of the present invention is to provide a work vehicle.

In order to achieve the first object of the present invention, the technical solution of the present invention provides a steering pump, including a stator; a rotor, at least part of which is arranged in the stator; the energy-saving device is used for driving the stator to switch between a first position and a second position, when the stator is at the first position, the steering pump stops sucking and/or discharging oil, and when the stator is at the second position, the steering pump sucks and/or discharges oil.

When the stator is located at the second position, the steering pump absorbs oil and/or discharges oil, and steering power is provided for the working vehicle. When the stator is in the first position, the steering pump stops absorbing and/or discharging oil, the energy consumption of the steering pump is reduced, and unnecessary energy waste is reduced. Meanwhile, the steering pump stops sucking oil and/or discharging oil, heating of a steering system is avoided, and the service life of the steering pump is prolonged. This technical scheme passes through the position transform of economizer drive stator for turn to the pump and can switch between operating condition and energy-conserving state, simple structure easily realizes, extension turn to pump life, and play the effect of energy saving.

In addition, the technical solution provided by the above technical solution of the present invention may further have the following additional technical features:

in the above technical solution, the energy saving device includes a first driving member, and the first driving member is used for driving the stator to switch from the second position to the first position.

This technical scheme can play the control effect to the displacement volume of stator through controlling first drive disk assembly for the stator can accurately stop in the primary importance, improves steering pump's performance. And through setting up first drive assembly, can also play backstop limiting displacement to the displacement of stator, the displacement is too big when avoiding the stator to switch over to the second position by the primary importance, influences the oil absorption and/or the oil extraction volume of steering pump, improves steering pump's stability, further promotes steering pump's performance.

In any of the above solutions, the first driving part includes one of: cylinder drive part, motor drive part, electromagnetic drive part, hydraulic drive part, flexible axle stay wire drive part.

In the technical scheme, the first driving part can be one of a cylinder driving part, a motor driving part, an electromagnetic driving part, a hydraulic driving part and a flexible shaft stay wire driving part, so that the steering pump can be suitable for different types of working vehicles, and the applicability of the steering pump is improved.

In any of the above technical solutions, the energy saving device further includes a power component, the power component is connected with the first driving component and is used for providing power for the first driving component to drive the stator to perform position switching; and the control component is arranged between the power component and the first driving component and is used for controlling the transmission or interruption of the power between the first driving component and the power component.

This technical scheme plays the control action to the power of first drive disk assembly through setting up power part and control part for the user can be according to the user demand, provides power to first drive disk assembly through control part control power part, and then the switching of control stator position plays the effect that the transform steering pump operating condition, improves the use flexibility of steering pump.

Among any one of the above-mentioned technical scheme, power component includes the gas receiver, and first drive component includes the cylinder, passes through the gas circuit connection between gas receiver and the cylinder.

This technical scheme has compressed gas through the storage in the gas receiver, and compressed gas provides power for the cylinder, realizes that cylinder drive stator switches to the primary importance by the second place, and simple structure improves the switching speed of stator between primary importance and second place, and then improves steering pump's performance. And the compressed gas for driving the cylinder is easy to obtain, and the cost of the steering pump is further reduced.

In any of the above technical solutions, the steering pump further includes a power takeoff, and the power takeoff is connected with the control component.

In the technical scheme, the power takeoff is connected with the control part, when the work vehicle is in an original-place working state, the control part is opened, so that the power part can simultaneously provide power for the first driving part and the power takeoff, the internal circuit of the work vehicle is simplified, the first driving part and the power takeoff can be simultaneously controlled through the control part, and the automation performance of the work vehicle is improved.

In any of the above technical solutions, the steering pump further includes a housing; the second driving part is used for driving the stator to be switched from the first position to the second position; the second driving member is disposed between the stator and the housing and is connected to at least one of the stator and the housing.

This technical scheme is through setting up the second driver part, and the drive stator is switched to the second position by the primary importance for the steering pump oil absorption and/or oil extraction realize providing the power assisted steering for the working vehicle, avoid the working vehicle can't the oil absorption and/or the oil extraction of steering pump in the course of driving, improve steering pump performance.

In any of the above solutions, the second driving member includes a spring.

Second drive element includes the spring among this technical scheme, simple structure reduces steering pump cost to improve the stator and switch over the speed to the second place by the primary importance, further promote steering pump's performance. Simultaneously, set up the second driver part into the spring, the extreme compression length through the spring can play certain limiting displacement to the displacement of stator, avoids the stator to produce too big displacement under first drive assembly's effect, leads to the steering pump can't stop to inhale oil and/or oil extraction, influences the user and uses.

In any of the above technical solutions, when the stator is at the first position, the rotor is located at a central position of the stator.

This technical scheme is located rotor central point through setting up the stator and puts for the rotor can not make steering pump oil absorption and/or oil extraction at the rotation in-process, and then plays energy saving's effect, and has avoided the a steering system to generate heat, prolongs steering pump life, and simple structure easily realizes, reduces steering pump cost.

In order to achieve the second object of the present invention, the technical solution of the present invention provides a work vehicle, including the steering pump according to any one of the above technical solutions, where the steering pump is used to provide steering assistance for the work vehicle, so that all the beneficial effects of any one of the above technical solutions are achieved, and details are not repeated herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is one of the schematic structural views of a steering pump according to some embodiments of the present invention;

FIG. 2 is a second schematic view of a steering pump according to some embodiments of the present invention;

fig. 3 is a block diagram schematically illustrating a construction of a work vehicle according to some embodiments of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

100: steering pump, 110: stator, 120: rotor, 130: energy saving device, 132: first drive member, 134: second drive member, 136: power unit, 138: control component, 1382: two-position three-way solenoid valve, 1384: rocker switch, 140: a housing, 150: power takeoff, 160: gas path, 170: working chamber, 180: blade, 200: a work vehicle.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A steering pump 100 and a work vehicle 200 according to some embodiments of the present invention will be described with reference to fig. 1 to 3.

Example 1:

as shown in fig. 1 and 2, the present embodiment provides a steering pump 100 including a stator 110, a rotor 120, and an economizer 130. At least part of the rotor 120 is provided in the stator 110. The economizer 130 is used to drive the stator 110 between the first position and the second position. When the stator 110 is in the first position, the steering pump 100 stops drawing oil and/or draining oil. When the stator 110 is in the second position, the steering pump 100 draws oil and/or discharges oil.

In this embodiment, at least a portion of the rotor 120 is disposed within the stator 110 such that a working cavity 170 is formed between the stator 110 and the rotor 120. During the driving process of the work vehicle 200, the engine drives the rotor 120 to rotate, so that the hydraulic oil enters and/or exits the working chamber 170, and further, the function of providing steering assistance for the work vehicle 200 is achieved.

Specifically, when work vehicle 200 is in the traveling state, economizer 130 drives stator 110 to the second position, where the centers of stator 110 and rotor 120 are offset from each other. The motor drives the rotor 120 to rotate so that the volume of the working chamber 170 is constantly changing. When the volume of the working chamber 170 is changed from small to large, hydraulic oil enters the steering pump 100 under the action of pressure. When the working chamber 170 is changed from large to small, the hydraulic oil is discharged out of the steering pump 100 under the pressure. In the present embodiment, by disposing the stator 110 at the second position, oil suction and/or oil discharge of the steering pump 100 is realized, and a function of providing steering assistance to the work vehicle 200 is performed.

When work vehicle 200 is in the on-site operating state, economizer 130 drives stator 110 in the first position. The engine drives the rotor 120 to rotate, and the volume of the working chamber 170 does not change along with the rotation of the rotor 120, so that the rotation of the rotor 120 cannot enable hydraulic oil to enter and/or be discharged out of the steering pump 100, the steering pump 100 stops sucking and/or discharging oil, the effect of reducing the energy consumption of the steering pump 100 is achieved, and unnecessary energy waste is reduced. Meanwhile, the steering pump 100 stops sucking oil and/or discharging oil, so that the heating of a steering system is avoided, and the service life of the steering pump 100 is prolonged.

In the embodiment, the position of the stator 110 is changed by the energy-saving device 130, so that the steering pump 100 can be switched between the working state and the energy-saving state, the structure is simple, the implementation is easy, the effects of reducing oil consumption and saving energy are achieved, the heat of the steering system is avoided, and the service life of the steering pump 100 is prolonged.

In some embodiments of the present invention, a person skilled in the art may set the first position of the stator 110 according to different types of the work vehicle 200, so that the steering pump 100 can provide the steering assistance to the work vehicle 200 to the maximum extent, and the usability of the steering pump 100 is improved.

Example 2:

as shown in fig. 1 and 2, the present embodiment provides a steering pump 100, and in addition to the technical features of embodiment 1 described above, the present embodiment further includes the following technical features.

The energy saving device 130 includes a first driving part 132. The first driving member 132 is used for driving the stator 110 to switch from the second position to the first position.

In the embodiment, the first driving member 132 and the stator 110 are disposed against each other, so that the first driving member 132 drives the stator 110 to perform position conversion. It is understood that the number of the first driving part 132 may be one or more. When the number of the first driving parts 132 is one, the first driving parts 132 of the present embodiment can simplify the structure of the steering pump 100, and reduce the production cost of the steering pump 100. When the number of the first driving members 132 is plural, the first driving members 132 of the present embodiment can stably support and stop the stator 110, so as to prevent the stator 110 from shaking when the position is switched, and further improve the usability of the steering pump 100.

In the present embodiment, the first driving member 132 is controlled to control the displacement of the stator 110, so that the stator 110 can be accurately stopped at the first position, and the usability, stability and reliability of the steering pump 100 are improved. And through setting up first driver part 132, can also play backstop limiting displacement to the displacement of stator 110, the displacement is too big when avoiding stator 110 to switch over to the second position by the first position, influences the oil absorption and/or the oil extraction volume of steering pump 100, improves steering pump 100's stability, further promotes steering pump 100's performance.

Example 3:

as shown in fig. 1 and 2, the present embodiment provides a steering pump 100, and in addition to the technical features of any of the above embodiments, further includes the following technical features.

The first drive member 132 includes one of: cylinder drive part, motor drive part, electromagnetic drive part, hydraulic drive part, flexible axle stay wire drive part.

Specifically, when the first driving member 132 is a cylinder driving member, the first driving member 132 has a faster expansion and contraction speed, so as to increase the switching speed of the stator 110 between the second position and the first position, and further improve the usability of the steering pump 100. And the air source through the driving air cylinder is easy to obtain, and the cost of the steering pump 100 is reduced. When the first driving part 132 is a motor driving part, the first driving part 132 is not affected by the ambient temperature, the applicability is strong, the stability of the steering pump 100 is improved, and the steering pump 100 can be suitable for different working environments. When the first driving member 132 is an electromagnetic driving member, the first driving member 132 drives the stator 110 to move under the action of the electromagnetic field, so that the performance is more stable, and the stability of the steering pump 100 is further improved. When the first driving member 132 is a hydraulic driving member, the friction force between the parts of the first driving member 132 is small, the service life of the first driving member 132 is prolonged, and the maintenance cost of the steering pump 100 is reduced. When the first driving member 132 is a flexible shaft and cable driving member, the structure is simple, the installation is convenient, and the cost of the steering pump 100 is reduced.

The present embodiment improves the applicability of the steering pump 100 by providing different types of first driving members 132 so that the steering pump 100 can be applied to different types of work vehicles 200.

Example 4:

The economizer 130 also includes a power component 136 and a control component 138. The power member 136 is connected to the first driving member 132 for providing the first driving member 132 with power to drive the stator 110 to switch positions. The control member 138 is disposed between the power member 136 and the first driving member 132, and is used for controlling transmission or interruption of power between the first driving member 132 and the power member 136.

The power member 136 in this embodiment provides power to the first drive member 132. It will be appreciated that the power member 136 and the first drive member 132 may be connected by an electrical circuit connection or an air path 160. The control member 138 is disposed between the power member 136 and the first drive member 132 to control the transmission or interruption of power therebetween.

Specifically, when the work vehicle 200 is in the driving state, the control component 138 controls the power component 136 to be disconnected from the first driving component 132, the power component 136 cannot provide power for the first driving component 132, the energy saving device 130 drives the stator 110 to be in the second position, and the steering pump 100 sucks and/or discharges oil to provide the steering assistance for the work vehicle 200.

When the work vehicle 200 is in the on-site working state, the control component 138 controls the power component 136 to be communicated with the first driving component 132, the power component 136 provides power for the first driving component 132, the first driving component 132 drives the stator 110 to be switched from the second position to the first position, and the steering pump 100 stops sucking oil and/or discharging oil, so that the oil consumption of the steering pump 100 is reduced.

It is understood that the power component 136 may be an air reservoir, a generator, a hydraulic oil tank, or the like, and the control component 138 may be a switch, a valve, or the like, so that the steering pump 100 can meet the use requirements of different work vehicles 200, and the applicability of the steering pump 100 is improved.

In this embodiment, the power component 136 and the control component 138 are arranged to control the power of the first driving component 132, so that a user can control the first driving component 132 through the control component 138 according to a use requirement, and further control the position switching of the stator 110, thereby realizing the function of controlling the working state of the steering pump 100 and improving the use flexibility of the steering pump 100.

Example 5:

The power component 136 includes an air reservoir. The first driving member 132 includes an air cylinder, and the air cylinder is connected to the air cylinder through an air passage 160.

The power unit 136 in this embodiment includes an air reservoir having compressed air stored therein. The first driving member 132 includes an air cylinder, and the air cylinder are connected by an air passage 160. Specifically, after the control component 138 controls the cylinder to be communicated with the air cylinder, the air drives the cylinder through the air passage 160, and the cylinder drives the stator 110 to be switched from the second position to the first position, so as to reduce the oil consumption of the steering pump 100. After the control component 138 controls the cylinder and the air reservoir to be disconnected, air cannot reach the cylinder through the air passage 160, the cylinder cannot push the stator 110 after losing an air source, and then the stator 110 is switched from the first position to the second position under the action of the second driving component 134, so that the steering pump 100 sucks and/or discharges oil, and steering power is provided for the work vehicle 200.

In some implementations of the present embodiment, the control component 138 includes a two-position, three-way solenoid valve 1382 and a rocker switch 1384. When the work vehicle 200 is in the original working state, the user can control the two-position three-way solenoid valve 1382 to open through the rocker switch 1384, so that the air cylinder and the air cylinder are communicated with each other. When the work vehicle 200 is in a driving state, the user controls the two-position three-way solenoid valve 1382 to be closed through the rocker switch 1384, so that the air cylinder and the air cylinder are disconnected from each other. The two-position three-way electromagnetic valve 1382 is controlled through the rocker switch 1384, the connection or the disconnection of the control air path 160 is controlled, the structure is simple, and the connection or the disconnection speed of the control air path 160 is improved.

Specifically, the two-position three-way solenoid valve 1382 may be connected to the air cylinder, and the power takeoff 150, respectively, to supply the air in the air cylinder to the power takeoff 150 and the air cylinder, thereby simplifying the line structure of the work vehicle 200. And the simultaneous control of the power take-off 150 and the first driving member 132 is realized by the two-position three-way solenoid valve 1382, thereby improving the automation performance of the work vehicle 200.

The compressed gas in the air storage cylinder drives the air cylinder, so that the stator 110 is driven to be switched to the first position from the second position, the structure is simple, the switching speed of the stator 110 between the first position and the second position is increased, and the use performance of the steering pump 100 is improved. And the compressed gas for driving the cylinder is easily available, further reducing the cost of the steering pump 100.

Example 6:

Steering pump 100 also includes a power take-off 150. The power take-off 150 is connected to the control unit 138.

In the present embodiment, the power takeoff 150 is connected to the control part 138, and when the work vehicle 200 is in the on-site operation state, the control part 138 is turned on, so that the power part 136 can simultaneously supply power to the first driving part 132 and the power takeoff 150, simplifying the wiring structure of the work vehicle 200, and improving the automation performance of the work vehicle 200 by simultaneously controlling the first driving part 132 and the power takeoff 150 through the control part 138.

Example 7:

The steering pump 100 also includes a housing 140 and a second drive component 134. The second driving member 134 is used for driving the stator 110 to switch from the first position to the second position. The second driving member 134 is disposed between the stator 110 and the case 140, and is connected to at least one of the stator 110 and the case 140.

The second driving member 134 is disposed between the stator 110 and the housing 140 in the present embodiment, and is used for driving the stator 110 to switch from the first position to the second position. It is understood that the number of the second driving members 134 may be one or more, and the number of the second driving members 134 and the number of the first driving members 132 may be the same or different.

It will be appreciated that the second drive member 134 is a resilient member, such as a spring or rubber. At least one of the second driving member 134 and the stator 110 or the housing 140 is connected to prevent the second driving member 134 from moving relative to the stator 110 or the housing 140 and affecting the use.

Specifically, when the work vehicle 200 is in the in-situ operating state, the first driving member 132 drives the stator 110 to switch from the second position to the first position, and the second driving member 134 is elastically deformed by the external force. When the work vehicle 200 is switched from the home operation state to the driving state, the control component 138 controls the power component 136 to be disconnected from the first driving component 132, the first driving component 132 loses power, and the stator 110 is switched from the first position to the second position under the elastic action of the second driving component 134, so that the steering pump 100 provides the steering assistance for the work vehicle 200.

In some embodiments of the present embodiment, a first driving member 132 may be provided, and a second driving member 134 may be provided at a position corresponding to the first driving member 132. Because the first driving part 132 and the second driving part 134 are arranged in a position corresponding to each other, the second driving part 134 can stably drive the stator 110 to be switched from the first position to the second position, the structure of the steering pump 100 is simplified, and the cost of the steering pump 100 is reduced.

In other embodiments of this embodiment, a single first driving member 132 may be provided, a plurality of second driving members 134 may be provided in different directions corresponding to the first driving member 132, and the plurality of second driving members 134 may drive the stator 110 from multiple directions, so as to avoid deviation of the stator 110 during position switching, and improve the usability of the steering pump 100.

In the embodiment, the second driving component 134 is arranged, and the driving stator 110 is switched from the first position to the second position, so that the steering pump 100 sucks oil and/or discharges oil, the steering assistance is provided for the working vehicle 200, the situation that the steering pump 100 cannot suck oil and/or discharge oil in the driving process of the working vehicle 200 is avoided, and the use performance of the steering pump 100 is improved.

Example 8:

The second drive member 134 comprises a spring.

The second driving member 134 in this embodiment includes a spring, which is simple in structure, reduces the cost of the steering pump 100, and increases the speed of the stator 110 switching from the first position to the second position, thereby further improving the usability of the steering pump 100.

Meanwhile, in this embodiment, the second driving part 134 is set as a spring, and the displacement of the stator 110 can be limited by the limit compression length of the spring, so that the stator 110 is prevented from generating too large displacement under the action of the first driving part 132, and the steering pump 100 cannot stop sucking oil and/or discharging oil, which affects the use of a user.

Example 9:

When the stator 110 is in the first position, the rotor 120 is located at the center of the stator 110.

In this embodiment, when the stator 110 is at the first position, the rotor 120 is located at the center of the stator 110, so that the volume of the working chamber 170 between the stator 110 and the rotor 120 is not changed along with the rotation of the rotor 120, and further, the steering pump 100 stops sucking and/or discharging oil, thereby reducing the energy consumption of the steering pump 100.

This embodiment is located rotor 120 central point through setting up stator 110 and puts for rotor 120 can not make steering pump 100 inhale oil and/or oil extraction at the rotation in-process, and then plays energy saving's effect, and has avoided steering system to generate heat, and extension steering pump 100 life, simple structure easily realizes, reduces steering pump 100 cost.

Example 10:

as shown in fig. 3, the present embodiment provides a work vehicle 200 including the steering pump 100 of any of the above embodiments.

The work vehicle 200 of the present embodiment includes the steering pump 100 of any one of the above embodiments, and the steering pump 100 is used to provide steering assistance for the work vehicle 200, so that all the advantages of any one of the above embodiments are provided, and details are not described herein.

It is to be understood that the work vehicle 200 in the present embodiment may be a concrete pump truck, a fire fighting vehicle, an aerial work vehicle, or the like.

Example 11:

in the related art, a steering pump of a work vehicle is connected to an engine to provide steering assist to the work vehicle. Taking a concrete pump truck as an example, when the concrete pump truck stops in situ to pump, the steering pump also works. And the pump-driving time in situ generally accounts for 90% of the service time of the concrete pump truck. This can cause the oil consumption of concrete pump truck to increase, and the hydraulic steering system generates heat, causes the ageing inefficacy of steering system rubber spare.

The related art adopts a variable displacement steering pump to solve the above problems. Under the condition of high rotating speed of the engine, the displacement of hydraulic oil of the variable steering pump is reduced, and part of oil consumption can be reduced, but the energy-saving effect is relatively limited.

In order to solve the above-described problems in the related art, the present embodiment provides a work vehicle 200 including a steering pump 100. Taking a vane-type steering pump as an example, the vane-type steering pump includes a stator 110, a rotor 120, vanes 180, and a cylinder.

As shown in fig. 1 and 2, 1 first driving member 132 is disposed on the steering pump 100, and the first driving member 132 is a cylinder, and the cylinder is communicated with a control air passage 160 of the power takeoff 150. When the work vehicle 200 stops at the original place to pump, the rocker switch 1384 controls the two-position three-way solenoid valve 1382 to make the power takeoff 150 take power, and the air cylinder obtains air pressure to push the stator 110, so that the hydraulic oil displacement of the steering pump 100 is reduced to an ideal value, and even the hydraulic oil displacement of the steering pump 100 is zero.

When the work vehicle 200 is running, the two-position three-way solenoid valve 1382 is controlled by the rocker switch 1384, so that the power take-off 150 cancels the power take-off, the air cylinder loses air pressure, the steering pump 100 returns to the original position under the action of the second driving part 134, and the hydraulic oil discharge amount returns to the proper value for the running of the work vehicle 200. The second driving member 134 of the present embodiment is embodied as a return spring.

According to the embodiment, when the working vehicle 200 stops at the original place to pump, the power consumption of the steering pump 100 is reduced to be even zero, so that the oil consumption of the working vehicle 200 is reduced, and the steering hydraulic system stops heating.

In summary, the embodiment of the invention has the following beneficial effects:

the energy-saving steering pump has the advantages that the stator is driven by the energy-saving device to be switched between the first position and the second position, so that the steering pump has two working states, namely an energy-saving state and a steering power-assisted state, the structure is simple, the energy consumption of the steering pump is reduced, and the use performance of the steering pump is improved.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steering pump, comprising:

a stator;

a rotor, at least a portion of the rotor being disposed in the stator;

the energy-saving device is used for driving the stator to switch between a first position and a second position, when the stator is at the first position, the steering pump stops sucking and/or discharging oil, and when the stator is at the second position, the steering pump sucks and/or discharges oil.

2. The steering pump of claim 1, wherein the economizer comprises:

a first drive member for driving the stator to switch from the second position to the first position.

3. The steering pump of claim 2, wherein the first drive component comprises one of:

cylinder drive part, motor drive part, electromagnetic drive part, hydraulic drive part, flexible axle stay wire drive part.

4. The steering pump of claim 2, wherein the economizer further comprises:

the power component is connected with the first driving component and used for providing power for driving the stator to switch positions for the first driving component;

and the control component is arranged between the power component and the first driving component and is used for controlling the transmission or interruption of the power between the first driving component and the power component.

5. The steering pump of claim 4, wherein the power member includes an air reservoir, and the first drive member includes an air cylinder, the air reservoir being connected to the air cylinder via an air passage.

6. The steering pump of claim 4, further comprising:

a power take-off connected to the control member.

7. The steering pump of claim 1, further comprising:

a housing;

a second driving member for driving the stator to switch from the first position to the second position;

the second driving member is provided between the stator and the housing and connected to at least one of the stator and the housing.

8. The steering pump of claim 7, wherein the second drive member comprises a spring.

9. Steering pump according to any one of claims 1-8, characterized in that the rotor is located in the centre of the stator when the stator is in the first position.

10. A work vehicle, characterized by comprising:

a steering pump as claimed in any one of claims 1 to 9 for providing steering assistance to the work vehicle.