CN215622246U

CN215622246U - Power steering system

Info

Publication number: CN215622246U
Application number: CN202120661706.8U
Authority: CN
Inventors: 朱兴旺; 朱胜峰; 雷浩; 马永进; 任培; 万民伟
Original assignee: Hangzhou Shibao Auto Steering Gear Co ltd
Current assignee: Hangzhou Shibao Auto Steering Gear Co ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-01-25
Anticipated expiration: 2031-03-31

Abstract

The utility model discloses a power steering system, which relates to the technical field of power transmission.A controller is connected with a torque and angle sensor at the input end, and the output end of the controller is respectively connected with the input ends of a first motor and a second motor; the output end of the first motor is connected with the first worm; the output end of the second motor is connected with the second worm; the first worm and the second worm are respectively meshed with the worm wheel. The controller is transmitted to the power that will exert on the steering wheel simultaneously to the last moment of torsion corner sensor of input shaft, and the controller calculates the target torque of first motor and second motor according to the moment of torsion corner sensor, applys forward or reverse helping hand to first worm through first motor, and the second motor applys forward or reverse helping hand to the second worm, and first motor and second motor work jointly, and the helping hand that provides can promote greatly when making to turn to makes the vehicle of heavy load turn to.

Description

Power steering system

Technical Field

The utility model relates to the technical field of power transmission, in particular to a power steering system.

Background

To meet the load requirements of large vehicles in the passenger vehicle market, such as large SUV vehicles. More and more vehicles are now changing from hydraulic to electric power assistance, however the ordinary single-motor C-EPS of a slightly larger vehicle is not satisfactory in terms of power assistance. At the present stage, a motor with large torque has high cost, heavier weight, unreliable performance and weak competitiveness, while the torque of a common motor is 2-5 Nm, and the motor can meet the power-assisted requirement of a small passenger car but cannot meet the requirement of a large car.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model provides a power-assisted steering system, which aims at the technical problem that a double motor causes a large load of an automobile in running.

2. Technical scheme

In order to solve the problems, the technical scheme provided by the utility model is as follows: a power steering system comprising a controller, a torque angle sensor, a worm gear, a transmission assembly, a first worm, a second worm, a first motor, and a second motor, wherein: the input end of the controller is connected with the torque and corner sensor, and the output end of the controller is respectively connected with the input ends of the first motor and the second motor; the output end of the first motor is connected with the first worm; the output end of the second motor is connected with the second worm; the first worm and the second worm are respectively meshed with the worm wheel; the worm gear is sleeved on the transmission assembly; the transmission assembly is used for being meshed with the output shaft.

Optionally, the first worm and the second worm are both inclined to the direction of the transmission assembly and meshed with the worm wheel.

Optionally, a plurality of claws are distributed on the output ends of the first motor and the second motor along the circumferential surface, and a plurality of claw seats matched with the claws are arranged at one ends of the first worm and the second worm.

Optionally, a first shell is arranged outside the worm wheel and the transmission assembly, a second shell is arranged outside the torque and angle sensor, a third shell is arranged outside the first worm and the second worm, a fourth shell is arranged outside the first motor and the second motor, the first shell is connected with the second shell, one end of the third shell is connected with the first shell, and the other end of the third shell is connected with the fourth shell.

Optionally, the first housing, the second housing, the third housing, and the fourth housing are made of aluminum alloy.

Optionally, the transmission assembly comprises a screw rod, a first nut and a second nut, the first nut is sleeved on the screw rod in a sleeved mode, the second nut is sleeved on the periphery of the first nut, one side of the second nut abuts against the first shell, the other side of the second nut is used for being meshed with the output shaft, and the worm wheel is sleeved on the screw rod.

Optionally, an insert abutting against the second nut is arranged inside the first shell, one surface of the insert is embedded inside the first shell, the other surface of the insert protrudes out of the inner surface of the first shell, and the insert is made of nodular cast iron.

Optionally, a harness protection shell is mounted on the outer surface of the second shell, and the harness protection shell is provided with a clamping protrusion matched with the inner surface of the second shell.

Optionally, the outer surface of the second shell is provided with a positioning hole, and the harness protection shell is provided with a positioning block matched with the positioning hole.

Optionally, the third housing and the fourth housing are detachably connected by a screw, and the first housing and the second housing are detachably connected by a screw.

3. Advantageous effects

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

(1) the embodiment of the application provides a power-assisted steering system, the input shaft is connected to the steering wheel, the power that will apply on the steering wheel is transmitted simultaneously for the controller to the last moment of torsion corner sensor of input shaft, the controller calculates the target torque of first motor and second motor according to moment of torsion corner sensor, apply forward or reverse helping hand to first worm through first motor, the second motor is applied forward or reverse helping hand to the second worm, first worm and second worm drive the worm wheel simultaneously and rotate, and then the worm wheel transmits the steering power for drive assembly, drive assembly drive output shaft assembly is the repetitive motion, accomplish the helping hand function. First motor and second motor combined work, the helping hand that provides when making to turn to can promote greatly, makes the vehicle of heavy load turn to, and under the condition that a motor became invalid because of the trouble, another motor can continue to work, ensures the normal operating of steering gear.

(2) According to the power steering system provided by the embodiment of the application, the first motor and the first worm are fixedly connected with the clamping seat through the clamping jaws, and the second motor and the second worm are fixedly connected with the clamping seat through the clamping jaws, so that the first motor drives the first worm to rotate, and the second motor drives the second worm to rotate.

Drawings

Fig. 1 is a schematic structural diagram of a power steering system according to an embodiment of the present invention;

fig. 2 is a control schematic diagram of a steering assist system according to an embodiment of the present invention;

fig. 3 is a transverse sectional view of a steering assist system according to an embodiment of the present invention;

fig. 4 is a longitudinal sectional view of a steering assist system according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating a connection between a second housing and a harness protective housing of the power steering system according to the embodiment of the present invention;

fig. 6 is a schematic view of a harness protective case of the power steering system according to the embodiment of the present invention.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. 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 expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, and the technical solutions are within the scope of the present invention.

Example 1

Referring to fig. 1 to 6, the power steering system of the present embodiment includes a controller, a torque angle sensor 1, a worm wheel 3, a transmission assembly 2, a first worm 4, a second worm 5, a first motor 6, and a second motor 7, wherein: the input end of the controller is connected with the torque and corner sensor 1, and the output end of the controller is respectively connected with the input ends of the first motor 6 and the second motor 7; the output end of the first motor 6 is connected with the first worm 4; the output end of the second motor 7 is connected with the second worm 5; the first worm 4 and the second worm 5 are respectively meshed with the worm wheel 3; the worm wheel 3 is sleeved on the transmission assembly 2; the transmission assembly 2 is adapted to engage with an output shaft. The steering wheel is connected with the input shaft, the force applied to the steering wheel is simultaneously transmitted to the controller by the torque angle sensor 1 on the input shaft, the controller calculates the target torque of the first motor 6 and the second motor 7 according to the torque angle sensor 1, the forward or reverse assistance is applied to the first worm 4 through the first motor 6, the forward or reverse assistance is applied to the second worm 5 by the second motor 7, the first worm 4 and the second worm 5 simultaneously drive the worm wheel 3 to rotate, further, the worm wheel 3 transmits the steering force to the transmission component 2, the transmission component 2 drives the output shaft assembly to do repeated motion, and the assistance function is completed. The first motor 6 and the second motor 7 work together, so that the power assistance provided during steering can be greatly improved, and a vehicle with a large load can be steered.

Example 2

With reference to fig. 1 to 6, compared with the technical solution of embodiment 1, the steering assist system of the present embodiment can be improved as follows: the first worm 4 and the second worm 5 are inclined towards the direction of the transmission component 2 and are meshed with the worm wheel 3. The worm wheel 3 is positioned in the shell, and the first worm 4 and the second worm 5 are inclined towards the direction of the transmission component 2, so that the structure of the steering power-assisted system is more compact, the installation area is reduced, the volume of the shell is reduced, and the weight of the steering power-assisted system is further reduced.

Example 3

With reference to fig. 1 to 6, the steering assist system of the present embodiment can be improved as follows compared with the technical solutions of embodiment 1 or 2: a plurality of claws 601 are distributed at the output ends of the first motor 6 and the second motor 7 along the circumferential surface, and a plurality of claw seats matched with the claws 601 are arranged at one ends of the first worm 4 and the second worm 5. The first motor 6 and the first worm 4 are fixedly connected with the clamping seat 401 through the clamping jaw 601, and the second motor 7 and the second worm 5 are fixedly connected with the clamping seat 401 through the clamping jaw 601, so that the first motor 6 drives the first worm 4 to rotate, and the second motor 7 drives the second worm 5 to rotate.

Example 4

With reference to fig. 1 to 6, the steering assist system of the present embodiment can be improved as follows, compared with any one of the technical solutions of embodiments 1 to 3: the outside of worm wheel 3 and transmission assembly 2 is equipped with first casing 9, the outside of moment of torsion corner sensor 1 is equipped with second casing 10, the outside of first worm 4 and second worm 5 is equipped with third casing 11, the outside of first motor 6 and second motor 7 is equipped with fourth casing 12, first casing 9 is connected with second casing 10, third casing 11 one end is connected with first casing 9, and the third casing 11 other end is connected with fourth casing 12. The first housing 9, the second housing 10, the third housing 11, and the fourth housing 12 protect the components of the steering assist system from the external environment.

Example 5

With reference to fig. 1 to 6, the steering assist system of the present embodiment can be improved as follows, compared with any one of the technical solutions of embodiments 1 to 4: the first casing 9, the second casing 10, the third casing 11 and the fourth casing 12 are all made of aluminum alloy. The aluminum alloy has higher strength and light weight, and can greatly reduce the overall weight of a steering power-assisted system and the load of the electric automobile.

Example 6

With reference to fig. 1 to 6, the steering assist system of the present embodiment can be improved as follows, compared with any one of the technical solutions of embodiments 1 to 5: the transmission assembly 2 comprises a screw 201, a first nut 202 and a second nut 203, the first nut 202 is sleeved on the screw 201 in a sleeved mode, the second nut 203 is sleeved on the periphery of the first nut 202, one side of the second nut 203 abuts against the first shell 9, the other side of the second nut 203 is used for being meshed with an output shaft, and the worm wheel 3 is sleeved on the screw 201. The first worm 4 and the second worm 5 drive the worm wheel 3 to rotate, the worm wheel 3 transmits steering force to the screw 201, so that the first nut 202 on the screw 201 drives the second nut 203 to rotate, and the second nut 203 drives the output shaft to move repeatedly.

Example 7

With reference to fig. 1 to 6, the steering assist system of the present embodiment can be improved as follows, compared with any one of the technical solutions of embodiments 1 to 6: an insert 901 abutting against the second nut 203 is arranged in the first shell 9, one surface of the insert is embedded in the first shell 9, the other surface of the insert 901 protrudes out of the inner surface of the first shell 9, and the insert 901 is made of nodular cast iron. The insert 901 replaces a shell to abut against the second nut 203, the ductile iron material increases the wear resistance and stability of the insert 901, so that the first shell 9 is not easy to deform while the weight is reduced, and the other surface of the insert 901 protrudes out of the inner surface of the first shell 9, so that the second nut 203 is prevented from contacting with the first shell 9, and the second shell 10 is prevented from deforming under stress. In other embodiments, the insert 901 may be made of heavy metals such as carbon steel, high-chromium cast iron, gray cast iron, and the like.

Example 8

With reference to fig. 1 to 6, the steering assist system of the present embodiment can be improved as follows, compared with any one of the technical solutions of embodiments 1 to 7: the outer surface of the second shell 10 is provided with a wiring harness protection shell 13, and the wiring harness protection shell 13 is provided with a clamping protrusion 1301 matched with the inner surface of the second shell 10. The catching projection 1301 passes through the wire harness passage hole of the second housing 10 and catches on the inner surface of the steering gear housing.

Example 9

With reference to fig. 1 to 6, the steering assist system of the present embodiment can be improved as follows, compared with any one of the technical solutions of embodiments 1 to 8: the second housing 10 has a positioning hole 1001 on an outer surface thereof, and the harness protection housing 13 has a positioning block 1302 engaged with the positioning hole 1001. The positioning hole 1001 is matched with the positioning block 1302 to fix the harness protection case 13 on the outer surface of the second housing 10, so that the harness protection case 13 is fixed on both the inner surface and the outer surface of the second housing 10, and stability is improved.

Example 10

With reference to fig. 1 to 6, the steering assist system of the present embodiment can be improved as follows, compared with any one of the technical solutions of embodiments 1 to 9: the third shell 11 and the fourth shell 12 are detachably connected through a screw 8, and the first shell 9 and the second shell 10 are detachably connected through the screw 8

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims

1. A power steering system, comprising a controller, a torque angle sensor, a worm gear, a transmission assembly, a first worm, a second worm, a first motor and a second motor, wherein:

the input end of the controller is connected with the torque and corner sensor, and the output end of the controller is respectively connected with the input ends of the first motor and the second motor;

the output end of the first motor is connected with the first worm;

the output end of the second motor is connected with the second worm;

the first worm and the second worm are respectively meshed with the worm wheel;

the worm gear is sleeved on the transmission assembly;

the transmission assembly is used for being meshed with the output shaft.

2. The power steering system of claim 1, wherein the first and second worms are each inclined in a direction of the drive assembly and engage the worm gear.

3. The power steering system according to claim 1, wherein a plurality of claws are distributed on the output ends of the first and second motors along the circumferential surface, and a plurality of claw seats matched with the claws are arranged at one ends of the first and second worms.

4. The power steering system according to claim 1, wherein a first housing is provided outside the worm wheel and gear assembly, a second housing is provided outside the torque angle sensor, a third housing is provided outside the first and second worms, a fourth housing is provided outside the first and second motors, the first housing is connected to the second housing, one end of the third housing is connected to the first housing, and the other end of the third housing is connected to the fourth housing.

5. The power steering system according to claim 4, wherein the first, second, third, and fourth housings are made of an aluminum alloy.

6. The power steering system according to claim 4, wherein the transmission assembly comprises a screw, a first nut, and a second nut, the first nut is sleeved on the screw, the second nut is sleeved on the outer periphery of the first nut, one side of the second nut abuts against the first housing, the other side of the second nut is used for being meshed with the output shaft, and the worm wheel is sleeved on the screw.

7. The power steering system according to claim 6, wherein an insert abutting against the second nut is arranged inside the first housing, one surface of the insert is embedded inside the first housing, the other surface of the insert protrudes out of the inner surface of the first housing, and the insert is made of ductile cast iron.

8. The power steering system according to claim 4, wherein a harness protective housing having a snap projection engaging an inner surface of the second housing is mounted on an outer surface of the second housing.

9. The power steering system of claim 8, wherein the second housing outer surface has a locating hole, and the harness protective housing has a locating block that mates with the locating hole.

10. The power steering system according to claim 4, wherein the third housing and the fourth housing are detachably connected by a screw, and the first housing and the second housing are detachably connected by a screw.