CN220974320U

CN220974320U - Electrohydraulic steering device

Info

Publication number: CN220974320U
Application number: CN202322949386.8U
Authority: CN
Inventors: 邹理炎; 胡贤能; 刘苌民; 陈聪林; 张宝义; 姚亚平
Original assignee: Hangzhou Shibao Auto Steering Gear Co ltd
Current assignee: Hangzhou Shibao Auto Steering Gear Co ltd
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2024-05-17
Anticipated expiration: 2033-11-01

Abstract

The utility model discloses an electrohydraulic steering device, which relates to the technical field of automobile steering and comprises an input shaft, a screw rod, a steering nut, a hydraulic component and an electric component, wherein one end of the input shaft is connected with the screw rod, the other end of the input shaft is used for being connected with a steering wheel, the hydraulic component is arranged at the joint of the input shaft and the screw rod, the other end of the screw rod, which is far away from the input shaft, is provided with the electric component, the steering nut is sleeved on the screw rod, and the steering nut is positioned between the hydraulic component and the electric component. Under the premise of ensuring that the vehicle has hydraulic power assistance and electric power assistance, the hydraulic component and the electric component are respectively arranged at two ends of the screw rod, so that the electric component is far away from the chassis of the vehicle, the structure of the steering device at the input end is simplified, and the space requirement of the steering device on the chassis of the vehicle is met.

Description

Electrohydraulic steering device

Technical Field

The utility model relates to the technical field of automobile steering, in particular to an electrohydraulic steering device.

Background

With the improvement of environmental awareness of human beings, the energy consumption of vehicles becomes an increasingly focused problem, and particularly, the energy consumption of commercial vehicles can be directly related to economic benefits. Under the development trend of the electric and intelligent of commercial vehicles, the traditional hydraulic power-assisted steering can not meet the requirements of people on steering stability, driving portability and fuel economy. The novel electrohydraulic composite steering system is developed gradually, structurally comprises an electric power assisting and hydraulic power assisting executing mechanism, and can realize adjustable steering power assisting, improve road feel and reduce energy consumption. In the prior art, a hydraulic power-assisted speed reducing mechanism and an electric power-assisted speed reducing mechanism of an electrohydraulic circulating ball steering device used for a vehicle are arranged at an input shaft end, and because the volumes of a worm wheel and a motor of the electric power-assisted speed reducing mechanism are large, the structure at the input shaft end is relatively bulky, interference is easily generated with the space of a vehicle chassis, and the requirement of a customer on the installation space of the vehicle chassis is not easily met.

Disclosure of utility model

1. Technical problem to be solved by the utility model

In order to solve the technical problems, the utility model provides the electrohydraulic steering device which enables an electric component to be far away from a vehicle chassis, simplifies the structure of the steering device at an input end and meets the requirement of a steering gear on the space of the vehicle chassis.

2. Technical proposal

In order to solve the problems, the technical scheme provided by the utility model is as follows: the utility model provides an electrohydraulic steering device, includes input shaft, screw rod, turns to nut, hydraulic assembly and electric assembly, input shaft one end is connected with the screw rod, and the input shaft other end is used for connecting the steering wheel, hydraulic assembly sets up the junction at input shaft and screw rod, the other end that the input shaft was kept away from to the screw rod is provided with electric assembly, turn to the nut cover and establish on the screw rod, and turn to the nut and be located between hydraulic assembly and the electric assembly.

Optionally, the screw rod includes spacing portion and drive portion, hydraulic assembly includes case and valve body, case one end is located spacing portion inside, the case other end is connected with the input shaft, the valve body cover is established at spacing portion periphery wall.

Optionally, the electric assembly includes pivot, worm wheel, worm and motor, the pivot is kept away from the one end fixed connection of input shaft with the screw rod, and the worm wheel cover is established in the pivot, worm one end and worm wheel meshing, the worm other end is connected with the motor.

Optionally, the device further comprises a torsion bar, one end of the torsion bar is located in the input shaft, and the other end of the torsion bar penetrates through the limiting part and extends into the transmission part.

Optionally, the torsion bar includes first torsion section and the second torsion section of being connected with first torsion section, first torsion section is located the input shaft inside, the second torsion section is located spacing portion and drive portion, the rigidity of second torsion section is less than the rigidity of first torsion section.

Optionally, the input shaft periphery wall is equipped with moment of torsion corner sensor, the motor is equipped with the sensing pencil of being connected with moment of torsion corner sensor.

Optionally, the steering nut is sleeved on the outer peripheral wall of the transmission part, and the steering nut is meshed with the output shaft.

Optionally, the valve further comprises a first shell and a second shell, the screw rod and the steering nut are both positioned inside the first shell, the rotating shaft and the worm wheel are both positioned inside the second shell, one end of the first shell is connected with the valve body, and the other end of the first shell is connected with the second shell.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

according to the electrohydraulic steering device provided by the embodiment of the application, the hydraulic component is arranged at the input shaft, the electric component is arranged at one end of the screw rod far away from the input shaft, and on the premise of ensuring that a vehicle has hydraulic power assistance and electric power assistance, the hydraulic component and the electric component are respectively arranged at two ends of the screw rod, so that the electric component is far away from the chassis of the vehicle, the structure of the steering device at the input end is simplified, and the space requirement of the steering device on the chassis of the vehicle is met.

Drawings

Fig. 1 is a schematic structural diagram of an electro-hydraulic steering device according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of an electric component of the electro-hydraulic steering device according to an embodiment of the present utility model.

The marks in the drawings are as follows: 1. an input shaft; 2. a screw; 21. a limit part; 22. a transmission part; 3. a steering nut; 4. a hydraulic assembly; 41. a valve core; 42. a valve body; 5. an electric component; 51. a rotating shaft; 52. a worm wheel; 53. a worm; 54. a motor; 541. a sensing wire harness; 6. a torsion bar; 61. a first torsion section; 62. a second torsion section; 7. a torque rotation angle sensor; 8. an output shaft; 9. a first housing; 10. and a second housing.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings. The first, second, etc. words are provided for convenience in describing the technical scheme of the present utility model, and have no specific limitation, and are all generic terms, and do not constitute limitation to the technical scheme of the present utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The technical schemes in the same embodiment and the technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is within the scope of the utility model.

Example 1

Referring to fig. 1, the electrohydraulic steering device of the embodiment comprises an input shaft 1, a screw rod 2, a steering nut 3, a hydraulic component 4 and an electric component 5, wherein one end of the input shaft 1 is connected with the screw rod 2, the other end of the input shaft 1 is used for connecting a steering wheel, the hydraulic component 4 is arranged at the joint of the input shaft 1 and the screw rod 2, the other end of the screw rod 2 far away from the input shaft 1 is provided with the electric component 5, the steering nut 3 is sleeved on the screw rod 2, and the steering nut 3 is positioned between the hydraulic component 4 and the electric component 5. The hydraulic component 4 is arranged at the position of the input shaft 1, the electric component 5 is arranged at one end of the screw rod 2 far away from the input shaft 1, and the hydraulic component 4 and the electric component 5 are respectively arranged at two ends of the screw rod 2 on the premise of ensuring that the vehicle is provided with hydraulic power assistance and electric power assistance, so that the electric component 5 is far away from the chassis of the vehicle, the structure of the steering device at the input end is simplified, and the space requirement of the steering device on the chassis of the vehicle is met. When installed, the electrohydraulic steering device is located below the vehicle chassis, wherein the input shaft 1 of the electrohydraulic steering device is connected to the steering wheel through the vehicle chassis.

Example 2

With reference to fig. 1, compared with the technical solution of embodiment 1, the electro-hydraulic steering device of the present embodiment can be improved as follows: the screw 2 comprises a limiting part 21 and a transmission part 22, the hydraulic assembly 4 comprises a valve core 41 and a valve body 42, one end of the valve core 41 is positioned in the limiting part 21, the other end of the valve core 41 is connected with the input shaft 1, and the valve body 42 is sleeved on the outer peripheral wall of the limiting part 21. The construction of the hydraulic assembly 4 is prior art.

Example 3

With reference to fig. 1 and 2, compared with the technical solutions of embodiment 1 or 2, the electro-hydraulic steering device of this embodiment can be improved as follows: the electric assembly 5 comprises a rotating shaft 51, a worm wheel 52, a worm 53 and a motor 54, wherein the rotating shaft 51 is fixedly connected with one end, far away from the input shaft 1, of the screw 2, the worm wheel 52 is sleeved on the rotating shaft 51, one end of the worm 53 is meshed with the worm wheel 52, and the other end of the worm 53 is connected with the motor 54. The rotating shaft 51 is connected with the screw 2 through the internal and external spline in a matched mode, and the worm wheel 52 drives the screw 2 to synchronously rotate through the rotating shaft 51. The motor 54 is an integral control motor 54.

Example 4

With reference to fig. 1, compared with any one of the technical schemes in embodiments 1-3, the electro-hydraulic steering device of the present embodiment can be improved as follows: the torsion bar 6 is further included, one end of the torsion bar 6 is located in the input shaft 1, and the other end of the torsion bar 6 passes through the limiting part 21 and extends into the transmission part 22.

Example 5

With reference to fig. 1, compared with any one of the technical schemes in embodiments 1 to 4, the electro-hydraulic steering device of the present embodiment can be improved as follows: the torsion bar 6 comprises a first torsion section 61 and a second torsion section 62 connected with the first torsion section 61, wherein the first torsion section 61 is positioned inside the input shaft 1, the second torsion section 62 is positioned in the limiting part 21 and the transmission part 22, and the rigidity of the second torsion section 62 is smaller than that of the first torsion section 61. The second torsion section 62 is twisted before the first torsion section 61, the second torsion section 62 drives the rotary valve, the rotary valve provides hydraulic power for the steering wheel, and as the input torque increases, the first torsion section 61 is twisted, so that the electric assembly 5 provides power for the steering wheel in a relay manner. The transmission between the second torsion section 62 and the rotary valve is of the prior art.

Example 6

With reference to fig. 1 and 2, compared with any one of the technical schemes in embodiments 1 to 5, the electro-hydraulic steering device of the present embodiment can be improved as follows: the outer peripheral wall of the input shaft 1 is provided with a torque rotation angle sensor 7, and the motor 54 is provided with a sensor harness 541 connected to the torque rotation angle sensor 7. When the vehicle turns, the torque of the steering wheel is transmitted to the input shaft 1, the second torsion bar 6 is twisted firstly due to the smaller rigidity of the second torsion section 62 in the valve core 41, then the rotary valve rotates for a certain angle in advance in the insensitive area, along with the increase of the input torque, the torque angle sensor 7 detects the torsion of the first torsion section 61 and transmits the detected signal to the integrated control motor 54 through the sensing wire harness 541, the control unit in the integrated control motor 54 calculates necessary supporting torque according to the steering torque, the steering angle, the vehicle speed, the engine rotating speed, the steering speed and the characteristic curve in the control unit, and starts the motor 54, and after the motor torque is meshed with the worm wheel 52 through the worm 53 to increase the torsion, the torque is transmitted to the screw 2, so that the proper input torque is provided for assisting the steering.

Example 7

With reference to fig. 1, compared with any one of the technical schemes of embodiments 1 to 6, the electro-hydraulic steering device of the present embodiment can be improved as follows: the steering nut 3 is sleeved on the outer peripheral wall of the transmission part 22, and the steering nut 3 is meshed with the output shaft 8. The output shaft 8 is used for being connected with a drive axle of an automobile to drive wheels to steer.

Example 8

With reference to fig. 1, compared with any one of the technical schemes of embodiments 1 to 7, the electro-hydraulic steering device of the present embodiment can be improved as follows: the novel steering device further comprises a first shell 9 and a second shell 10, wherein the screw rod 2 and the steering nut 3 are both positioned inside the first shell 9, the rotating shaft 51 and the worm gear 52 are both positioned inside the second shell 10, one end of the first shell 9 is connected with the valve body 42, and the other end of the first shell 9 is connected with the second shell 10.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. The utility model provides an electrohydraulic steering device, its characterized in that includes input shaft, screw rod, steering nut, hydraulic assembly and electric component, input shaft one end is connected with the screw rod, and the input shaft other end is used for connecting the steering wheel, hydraulic assembly sets up the junction at input shaft and screw rod, the other end that the input shaft was kept away from to the screw rod is provided with electric component, steering nut cover is established on the screw rod, and steering nut is located between hydraulic assembly and the electric component.

2. The electrohydraulic steering device of claim 1, wherein said screw includes a stopper portion and a transmission portion, said hydraulic assembly includes a spool and a valve body, one end of said spool is located in said stopper portion, the other end of said spool is connected to said input shaft, and said valve body is sleeved on an outer peripheral wall of said stopper portion.

3. The electrohydraulic steering device of claim 1, wherein said electric assembly includes a shaft fixedly connected to an end of said screw remote from said input shaft, a worm gear sleeved on said shaft, one end of said worm engaged with said worm gear, and another end of said worm connected to said motor.

4. The electro-hydraulic steering apparatus of claim 1, further comprising a torsion bar having one end located in the input shaft and another end extending through the stop portion into the transmission portion.

5. The electro-hydraulic steering apparatus of claim 4, wherein the torsion bar includes a first torsion section and a second torsion section connected to the first torsion section, the first torsion section being located inside the input shaft, the second torsion section being located in the limit portion and the transmission portion, the second torsion section having a stiffness less than a stiffness of the first torsion section.

6. The electro-hydraulic steering apparatus of claim 3, wherein the input shaft has a torque angle sensor on an outer peripheral wall thereof, and the motor has a sensor harness connected to the torque angle sensor.

7. The electro-hydraulic steering device of claim 1, further comprising an output shaft, wherein the steering nut is sleeved on the peripheral wall of the transmission part, and wherein the steering nut is meshed with the output shaft.

8. The electrohydraulic steering device of claim 3, further comprising a first housing and a second housing, said screw and steering nut being positioned within said first housing, said shaft and said worm gear being positioned within said second housing, said first housing being connected at one end to said valve body and at the other end to said second housing.