Electric hydraulic power steering device for sightseeing vehicle

Abstract

The utility model provides an electric hydraulic power steering device for a sightseeing vehicle, which belongs to the technical field of electric hydraulic steering for the sightseeing vehicle, and comprises a motor, a rotary pump, a damper and a steering engine, an oil outlet of the rotary pump is communicated and connected with an oil inlet of the steering engine; the damper is arranged on a steering shaft in the steering machine and comprises a damping cavity and a piston, and the piston is connected with the steering shaft through an elastic connecting piece. The utility model provides an electric hydraulic power steering device for a sightseeing vehicle, which can solve the problem that the stability and comfort of the sightseeing vehicle in the steering process are difficult to guarantee due to impact and vibration generated in the existing electric hydraulic steering.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electric hydraulic steering technology field for sightseeing car, concretely relates to a kind of electric hydraulic power steering device for sightseeing car. BACKGROUND

[0002] Electric hydraulic power steering system is gradually applied in electric or hybrid vehicles in recent years for sightseeing car. It combines the advantages of electric and hydraulic steering, and the core part of electric hydraulic power steering system is an electric motor, which drives hydraulic pump. Electric motor adjusts the work of hydraulic pump according to the steering demand of vehicle, so as to provide additional power for steering system when needed. Hydraulic pump will provide hydraulic oil to steering machine, and hydraulic system will provide corresponding pressure when vehicle steering, so as to reduce the torque of steering wheel when driver operates. Especially when driving at low speed or parking, hydraulic power is particularly obvious. The system usually combines sensors and electronic control unit (ECU) to adjust the strength of hydraulic power according to vehicle speed, steering angle and other information, so as to ensure that steering process is easy and accurate.

[0003] The utility model discloses a kind of electric hydraulic power steering devices with publication number CN204309885U (application number CN201420793871.9) of China utility model provides, including steering motor, vane pump and steering machine, the output shaft of the steering motor is transmission cooperation with vane pump, the oil outlet of vane pump is communicated with the oil inlet of steering machine;The steering motor is direct-current brushless motor;The electric hydraulic power steering device further includes high-voltage direct-current battery pack and DC-DC direct-current step-down controller, the voltage output end of the high-voltage direct-current battery pack is connected with the voltage input end of DC-DC direct-current step-down controller, the voltage output end of DC-DC direct-current step-down controller is connected with the voltage input end of steering motor. The design not only can realize stepless speed regulation, controllability is high, and operating stability is good, and service life is long.

[0004] But impact and vibration will be generated in electric hydraulic steering, which causes insufficient stability of vehicle. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a kind of electric hydraulic power steering device for sightseeing car, which can solve the impact and vibration generated in existing electric hydraulic steering, and ensure the stability and comfort of sightseeing car steering process.

[0006] The utility model is realized as follows:

[0007] The utility model provides a kind of electric hydraulic power steering device for sightseeing car, wherein, including motor, rotary pump, damper and steering machine, the output shaft of the motor is connected with the rotary pump drive, the oil outlet of the rotary pump is connected with the oil inlet of the steering machine through connection;Steering shaft inside the steering machine is provided with the damper, the damper includes damping cavity and piston, the piston is connected with steering shaft by elastic connecting piece.

[0008] On the basis of the above technical scheme, the electric hydraulic power steering device for sightseeing car of the utility model can also be improved as follows:

[0009] Among them, the inside of the damping cavity is filled with viscous damping liquid, for generating damping force by viscous damping liquid when the piston moves inside the damping cavity, to reduce vibration and impact in the steering process.

[0010] Further, the oil inlet of the steering machine is communicated with the storage tank, and the storage tank stores hydraulic oil.

[0011] Further, the storage tank is communicated with the oil inlet of the rotary pump.

[0012] Further, a plurality of filter screens are arranged in the storage tank, and the plurality of filter screens are inclined, for filtering impurities in the hydraulic oil to prevent them from entering the rotary pump and the steering machine.

[0013] Further, the included angle between adjacent filter screens is 60°.

[0014] Further, the shell of the damping cavity is oval, and the ratio of the major axis to the minor axis is 3:2, for reducing the space occupied by the device in the steering machine while ensuring the damping effect.

[0015] Further, the elastic connecting piece is a spiral spring, for providing appropriate elastic restoring force for the piston while ensuring the connection strength, to ensure stable operation of the damper.

[0016] Further, the wire diameter of the spiral spring is 3mm, and the effective number of turns of the spring is 10 turns.

[0017] Further, the surface of the piston is provided with an annular groove, and the annular groove is filled with wear-resistant rubber, for reducing the friction between the piston and the inner wall of the damping cavity.

[0018] Compared with the prior art, the electric hydraulic power steering device for sightseeing car provided by the utility model has the following advantages:

[0019] In this electric hydraulic power steering device, the output shaft of the motor is connected to the rotary pump. The motor drives the rotary pump through a transmission device. The main function of the motor is to provide power, which is converted into the movement of hydraulic fluid by the rotary pump. The rotary pump sucks hydraulic oil from the storage tank and delivers it to the steering machine through the hydraulic system, thereby providing power assistance to the steering machine. This structure effectively utilizes the power output of the motor, improving the efficiency and accuracy of the steering system.

[0020] The oil outlet of the rotary pump is connected to the oil inlet of the steering machine, and the hydraulic oil enters the steering machine through this pipeline. The flow of hydraulic oil inside the steering machine realizes hydraulic power assistance. The hydraulic system can provide appropriate power assistance according to the steering requirements, reducing the steering burden of the driver and improving steering sensitivity and comfort.

[0021] The damper is composed of a damping chamber and a piston, and the piston is connected to the steering shaft through an elastic connecting piece. The main function of the damper is to reduce the vibration and impact that may occur during steering, providing a smooth steering experience. When the hydraulic system is working, the piston moves in the damping chamber, generating damping force through the interaction with the viscous damping liquid inside the damping chamber, thereby reducing the instability during steering and improving the driving experience.

[0022] In order to increase the damping effect, the damping chamber is filled with viscous damping liquid. When the piston moves in the damping chamber, the viscous action of the damping liquid generates resistance, thereby slowing down the movement of the piston and reducing the impact of vibration and impact on the steering system. The choice and quality of the damping liquid directly affect the damping effect, which can effectively suppress the vibration during steering and avoid excessive response, ensuring the smoothness of the system.

[0023] The oil inlet of the steering machine is connected to the storage tank, which stores hydraulic oil to provide sufficient oil for the entire hydraulic system. The function of the storage tank is to maintain the stability of the oil quantity in the hydraulic system, ensuring that the hydraulic pump can continuously provide oil source when working.

[0024] In order to ensure the long-term stable operation of the hydraulic system, multiple layers of filter screens are installed in the storage tank. The main function of these filter screens is to filter impurities in the hydraulic oil, preventing contaminants from entering the rotary pump and the steering machine. These impurities may cause system blockage or damage to mechanical components, so the design of the filtration system is crucial. The filter screens are arranged in an inclined manner, further enhancing the filtering effect when the oil flows. The included angle between the filter screens is 60°, which helps to improve the filtering efficiency and reduce the resistance of the hydraulic oil.

[0025] The outer shell of the damping cavity adopts an oval design, and the ratio of the long axis to the short axis is 3:2. The purpose of this design is to reduce the space occupied by the damper in the steering machine while ensuring good damping effect. The oval shell structure can effectively utilize space compared to the traditional circular structure, ensuring that the overall structure of the steering machine is more compact and lightweight.

[0026] The helical spring acts as an elastic connecting piece, ensuring connection strength and providing appropriate elastic return force. The helical spring ensures that the piston can maintain appropriate pressure during operation and quickly return to the initial state after the piston movement ends. The wire diameter of the helical spring is 3mm, and the effective number of turns is 10. These parameters ensure that the spring has sufficient strength while maintaining flexibility, adapting to different work requirements.

[0027] The piston surface is provided with an annular groove, and the groove is filled with wear-resistant rubber. This design is used to reduce friction between the piston and the inner wall of the damping cavity, prolong the service life of the piston, and ensure stable working performance of the system during long-term operation. The role of wear-resistant rubber is to reduce wear and friction, avoid damage to the piston surface, and ensure stable operation of the damper. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0029] Figure 1 It is a structural schematic diagram of an electric hydraulic power steering device for a sightseeing vehicle.

[0030] In the drawings, the component list represented by each reference numeral is as follows:

[0031] 10, motor; 20, rotary pump; 30, damper; 31, damping cavity; 32, piston; 33, elastic connecting piece; 40, steering machine. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application.

[0033] For example, Figure 1The utility model provides a kind of electric hydraulic power steering device for sightseeing car, and in the embodiment, including motor 10, rotary pump 20, damper 30 and steering machine 40, the output shaft of motor 10 is connected with rotary pump 20, and the oil outlet of rotary pump 20 is connected with the oil inlet of steering machine 40;Damping chamber 31 and piston 32 are included in damper 30, which is arranged on the steering shaft inside steering machine 40, and piston 32 is connected with steering shaft by elastic connecting piece 33.

[0034] In the above technical solution, the inside of damping chamber 31 is filled with viscous damping liquid, which generates damping force through viscous damping liquid when piston 32 moves inside damping chamber 31, to reduce vibration and impact during steering.

[0035] Further, in the above technical solution, the oil inlet of steering machine 40 is connected with the storage tank, and the storage tank stores hydraulic oil.

[0036] Further, in the above technical solution, the storage tank is connected with the oil inlet of rotary pump 20.

[0037] Further, in the above technical solution, a plurality of filter screens are arranged in the storage tank, and the plurality of filter screens are inclined, for filtering impurities in hydraulic oil to prevent them from entering rotary pump 20 and steering machine 40.

[0038] Further, in the above technical solution, the included angle between adjacent filter screens is 60°.

[0039] Further, in the above technical solution, the shell of damping chamber 31 is elliptical, and the ratio of major axis to minor axis is 3:2, for reducing the space occupied by the device in steering machine 40 while ensuring damping effect.

[0040] Further, in the above technical solution, elastic connecting piece 33 is a coil spring, for providing appropriate elastic restoring force for piston 32 while ensuring connection strength, to ensure stable operation of damper 30.

[0041] Further, in the above technical solution, the wire diameter of the coil spring is 3mm, and the effective number of turns of the spring is 10 turns.

[0042] Further, in the above technical solution, the surface of piston 32 is provided with an annular groove, and the annular groove is filled with wear-resistant rubber, for reducing the friction between piston 32 and the inner wall of damping chamber 31.

[0043] Specifically, the principle of the utility model is: when using, make sure that there is enough hydraulic oil in the storage tank, and the quality of the hydraulic oil meets the standard and has no pollutants. When rotating the steering wheel, the rotary pump will provide corresponding hydraulic assistance according to the change of the steering angle, so that steering is more convenient. The hydraulic oil is delivered to the steering machine through the pipeline, and the system will automatically adjust the assistance degree according to the needs. The damper and viscous damping liquid in the hydraulic system will provide appropriate feedback during steering to ensure that the steering feeling is smooth and comfortable. You will feel moderate damping force, which helps to reduce vibration or overreaction during steering.

Claims

1. An electro-hydraulic power steering device for sightseeing vehicles, characterized in that, The utility model relates to a steering device, which comprises a motor (10), a rotary pump (20), a damper (30) and a steering machine (40), the output shaft of the motor (10) is in transmission connection with the rotary pump (20), the oil outlet of the rotary pump (20) is in through connection with the oil inlet of the steering machine (40), the steering shaft inside the steering machine (40) is provided with the damper (30), the damper (30) comprises a damping cavity (31) and a piston (32), the piston (32) is connected with the steering shaft through an elastic connecting piece (33). The inside of the damping cavity (31) is filled with viscous damping liquid, which is used for generating damping force through viscous damping liquid when the piston (32) moves inside the damping cavity (31), so as to reduce vibration and impact in the steering process.

2. The electric hydraulic power steering apparatus for a sightseeing vehicle according to claim 1, characterized by The oil inlet of the steering machine (40) is communicated with a storage tank, and the storage tank stores hydraulic oil.

3. The electric hydraulic power steering apparatus for a sightseeing vehicle according to claim 2, characterized by The storage tank is communicated with the oil inlet of the rotary pump (20).

4. The electric hydraulic power steering apparatus for a sightseeing vehicle according to claim 3, characterized by The storage tank is provided with a plurality of layers of filter screens, the plurality of layers of filter screens are inclined, which are used for filtering impurities in the hydraulic oil to prevent the impurities from entering the rotary pump (20) and the steering machine (40).

5. A power hydraulic assisted steering apparatus for a sightseeing vehicle according to claim 4, wherein The included angle between adjacent filter screens is 60°.

6. A power hydraulic assisted steering apparatus for a sightseeing vehicle according to claim 5, wherein The shell of the damping cavity (31) is oval, the ratio of the long axis to the short axis is 3:2, which is used for reducing the space occupied by the device in the steering machine (40) while ensuring the damping effect.

7. A power hydraulic assisted steering apparatus for a sightseeing vehicle according to claim 6, wherein The elastic connecting piece (33) is a spiral spring, which is used for providing appropriate elastic reset force for the piston (32) while ensuring the connection strength, so as to ensure the stable work of the damper (30).

8. The electric hydraulic power steering apparatus for a sightseeing vehicle according to claim 7, wherein The wire diameter of the spiral spring is 3mm, and the effective number of turns of the spring is 10 turns.

9. The electric hydraulic power steering apparatus for a sightseeing vehicle according to claim 8, wherein The surface of the piston (32) is provided with an annular groove, the annular groove is filled with wear-resistant rubber, which is used for reducing the friction between the piston (32) and the inner wall of the damping cavity (31).

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