CN111874085A - Double-input steering device - Google Patents

Abstract

The application relates to turn to device technical field, specifically, relate to a dual input turns to device, and it includes: a frame; a steering output shaft rotatably mounted to the frame; the steering coupler comprises a first coupler and a second coupler, and the first coupler and the second coupler are circumferentially fixed and axially movably arranged on the steering output shaft; the first power input device is arranged on the rack and comprises a first rotating mechanism and a first rotating piece, the first rotating piece is used for being in transmission connection with the first combining piece, and the first rotating mechanism is used for driving the first rotating piece to rotate; the second power input device is arranged on the rack and comprises a second rotating mechanism and a second rotating part, the second rotating part is used for being in transmission connection with the second combining part, and the second rotating mechanism is used for driving the second rotating part to rotate; and the steering switching device is arranged on the frame and used for driving the steering coupler to move along the steering output shaft so that the steering output shaft is connected with the first power input device or the second power input device.

Description

A dual input steering device

technical field

The present application relates to the technical field of steering devices, and in particular, to a dual-input steering device.

Background technique

Current vehicles are generally single-input steering, such as manual steering for manually-driven wheeled vehicles, or electric steering for intelligent driverless wheeled vehicles, which cannot be compatible with the two steering modes.

SUMMARY OF THE INVENTION

The present application aims to provide a dual-input steering device to solve the problem that the steering device in the prior art cannot be compatible with two steering modes.

The embodiments of the present application are implemented as follows:

In a first aspect, an embodiment of the present application provides a dual-input steering device, which includes:

frame;

a steering output shaft, rotatably mounted on the frame;

a steering coupler, comprising a first coupler and a second coupler, the first coupler and the second coupler are both circumferentially fixed and axially movably arranged on the steering output shaft;

A first power input device, mounted on the frame, includes a first rotating mechanism and a first rotating member, the first rotating member is used for drivingly connecting with the first coupling member, and the first rotating mechanism is used for driving the first rotating member to rotate;

A second power input device, mounted on the frame, includes a second rotating mechanism and a second rotating member, the second rotating member is used for drivingly connecting with the second coupling member, and the second rotating mechanism is used for driving the second rotating member to rotate;

A steering switching device, mounted on the frame, for driving the steering coupling to move along the steering output shaft, so that the steering output shaft is connected to the first power input device or the second power input device .

In the dual input steering device provided by the present application, the steering output shaft of the steering output shaft can be connected to the first power input device or the second power input device through the steering coupling. When the first coupling member is connected to the first rotating member, the first power input device drives the steering The output shaft rotates to output the steering; when the steering mode needs to be switched, the steering switching device drives the steering coupling to move, so that the first coupling part is separated from the first rotating part, and the second coupling part is close to the second rotating part and connected, so that the second The power input device drives the steering output shaft to rotate, thereby outputting steering. Through the above arrangement, the dual-input steering device provided by the present application can be compatible with two steering modes.

In an embodiment of the present application, optionally, the steering coupling further includes a first elastic member and a second elastic member, and the first elastic member abuts against the first coupling member and the first elastic member. Between the two coupling members, the second elastic member abuts between the second rotating member and the second coupling member, and the elastic force of the first elastic member is greater than the elastic force of the second elastic member;

The output end of the steering switching device is axially fixed and circumferentially rotatably connected to the first coupling member.

In the above technical solution, the output end of the steering switching device drives the first joint to move, and when the first joint is connected to the first rotating member, the first power input device drives the steering output shaft to rotate, thereby outputting the steering. The elastic member keeps the second coupling member away from the second rotating member; when the steering mode needs to be switched, the steering switching device drives the first coupling member to move and separate from the first rotary member, and when the first coupling member moves, it is driven by the first elastic member For the second connecting piece, the second elastic piece is first compressed, so that the second connecting piece is close to the second rotating piece and connected. By arranging the first elastic member and the second elastic member, when the movement of the second binding member is blocked, the first binding member moves to compress the first elastic member to store energy, and when the obstacle is removed, the first elastic member releases the stored energy to drive the second binding member , compress the second elastic member to make the second joint member close to the second rotating member to realize the switching of the steering mode, and when the steering mode needs to be switched, the steering switching device drives the first joint member to move towards the first rotating member, and the second rotating member can Under the action of the second elastic member, it is away from the second rotating member.

Therefore, when the power source is switched from the first power input device to the second power input device, even if the second joint is blocked, the steering switching device can operate normally, and can drive the second joint to connect the second rotating member with a delay, so as to realize the The switching of the steering mode is delayed; when the power source is switched from the second power input device to the first power input device, the second elastic member is quickly reset to disconnect the second coupling member from the second rotating member.

In an embodiment of the present application, optionally, the first coupling member is sleeved on the steering output shaft and is matched with the steering output shaft keyway, and an outer peripheral surface of the first coupling member is formed There is a circumferential ring groove;

The output end of the steering switching device is fitted in the circumferential annular groove.

In the above technical solution, the first coupling member is matched with the steering output shaft keyway, so that the first coupling member can move along the steering output shaft, and when the first rotating member drives the first coupling member to rotate, it can also drive the steering output shaft to rotate ; When the first joint is rotated, the output end of the steering switching device moves in the circumferential ring groove.

In an embodiment of the present application, optionally, the steering switching device includes an arc-shaped shifting fork, the arc-shaped shifting fork is connected to the output end of the steering switching device, and the arc-shaped shifting fork extends along the The circumferential ring groove extends.

In the above technical solution, the arc-shaped shift fork clamps the first coupling piece, the first coupling piece can enter and exit from the opening of the arc-shaped shift fork to facilitate installation, the connection between the two is stable, and does not affect the rotation; the steering switching device is driving When the first coupling part moves, the force of the first coupling part is more balanced, which is beneficial to the smooth movement of the first coupling part.

In an embodiment of the present application, optionally, the first rotation mechanism includes a driving shaft and a steering wheel, the driving shaft is rotatably mounted on the frame, and the rotation axis of the driving shaft is the same as the rotation axis of the driving shaft. The rotation axis of the steering output shaft is on a straight line, the steering wheel is mounted on the end of the driving shaft away from the steering output shaft, and the first rotating member is mounted on the end of the driving shaft close to the steering output shaft.

In the above technical solution, when the first coupling member is connected to the first power input device, it is a manual mode, and the user can drive the driving shaft through the steering wheel, and drive the first coupling member through the first rotating member on the driving shaft to drive the steering. The output shaft rotates.

In an embodiment of the present application, optionally, an insertion rod is formed at the end of the driving shaft, an insertion hole is formed at the end of the steering output shaft, and the insertion rod is clearance fit in the insertion hole .

In the above technical solution, the insertion rod of the driving shaft is inserted into the insertion hole of the steering output shaft, so as to ensure that the steering output shaft and the driving shaft are approximately on the same rotation axis, and also to ensure that the first joint can move along the steering output shaft and move toward the first The rotating parts are connected close together, and at the same time, the insertion rod and the socket are in clearance fit, so that the two can freely rotate relative to each other without frictional interference.

In an embodiment of the present application, optionally, the driving shaft is matched with a keyway of the first rotating member, and the first rotating member is engaged with the first coupling member for transmission.

In the above technical solution, when the first coupling member is engaged with the first rotating member, the driving shaft rotates to drive the first rotating member, and the first rotating member drives the first coupling member to rotate, thereby driving the steering output shaft to rotate.

In an embodiment of the present application, optionally, the first power input device further includes a third elastic member, the third elastic member abuts between the frame and the first rotating member .

In the above technical solution, when the steering switching device drives the first coupling member to move toward the first rotating member, if the coupling between the first coupling member and the first rotary member is blocked, for example, the first coupling member and the first rotary member cannot be properly engaged. At this time, the first joint can move in place, the first joint pushes up the first rotating piece along the driving shaft, and the third elastic piece compresses. At this time, turning the steering wheel drives the first rotating piece to move relative to the first joint piece, so that the The engaging parts of the two are correspondingly convex and concave, and the third elastic member releases the stored energy to drive the first rotating member to move towards the first combining member and engage. With the above arrangement, when the power source is switched from the second power input device to the first power input device, even if the first coupling member and the first rotating member cannot be exactly correspondingly coupled, the steering switching device can still operate normally, and can drive the first power input device with a delay. A rotating part is connected to the first combination part to realize the delayed switching of the steering mode.

In an embodiment of the present application, optionally, the second rotation mechanism includes a steering motor, a driving gear and a driven gear, the steering motor is mounted on the frame, and the driving gear is connected to the steering the output end of the motor, the driven gear meshes with the driving gear;

The second rotating member is rotatably mounted to the frame, and the driven gear is formed outside the second rotating member.

In the above technical solution, the steering motor drives the second rotating member through the driving gear and the driven gear, so that the steering motor can be installed on one side of the steering output shaft, reducing the installation height and effectively driving the second rotating member.

In an embodiment of the present application, optionally, the steering switching device further includes a switching motor, a lead screw and a nut, the switching motor is mounted on the frame, and the lead screw is parallel to the steering output a shaft, and the nut is threadedly fitted with the lead screw and connected to the first coupling part.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a front view of a dual-input steering device provided by an embodiment of the present application;

2 is a schematic cross-sectional view of a steering output shaft and a driving shaft provided by an embodiment of the present application;

3 is an exploded view of a steering output shaft and a driving shaft provided by an embodiment of the application;

4 is a bottom view of a dual-input steering device provided by an embodiment of the present application;

5 is a front view of the dual-input steering device provided by the embodiment of the present application after the frame is hidden;

6 is a front view of a first rotating member provided in an embodiment of the present application;

7 is a schematic perspective view of a first rotating member provided in an embodiment of the present application;

8 is a schematic perspective view of a second rotating member provided in an embodiment of the present application;

FIG. 9 is a schematic three-dimensional schematic diagram of a first coupling member provided in an embodiment of the present application;

FIG. 10 is a schematic perspective view of a second coupling member provided in an embodiment of the present application.

Icon: 100-frame; 110-first base; 120-second base; 200-steering output shaft; 210-spline segment; 211-socket; 220-installation segment; 230-output segment; 300- 310-drive shaft; 311-insert rod; 320-first rotating member; 321-locking groove; 322-first recess; 330-third elastic member; 400-second power input device; 410 - steering motor; 411 - driving gear; 412 - driven gear; 420 - second rotating part; 421 - second recess; 500 - steering coupling; 510 - first coupling part; 511 - circumferential ring groove; 512 - first 1 convex tooth; 520—the second joint; 521—the second convex tooth; 530—the first elastic part; 540—the second elastic part; 600—the gasket; 700—the steering switching device; 720-switching motor; 730-screw; 740-slide; 800-steering angle detection device; 900-motor rotation angle detection device.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear ” and other indications are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the application is usually placed in use, and are only for the convenience of describing the application and simplifying the description, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application. In addition, if the terms "first", "second" and the like appear in the description of the present application, they are only used to distinguish the description, and should not be understood as indicating or implying relative importance.

Furthermore, the appearance of the terms "horizontal", "vertical" and the like in the description of the present application does not mean that the component is required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed The connection can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

Example

Current vehicles are generally single-input steering, such as manual steering for manually-driven wheeled vehicles, or electric steering for intelligent driverless wheeled vehicles, which cannot be compatible with the two steering modes. Taking an old scooter or an electric power-assisted vehicle as an example, the steering mechanism can generally only be steered manually. The dual-input steering device provided in the embodiment of the present application can simultaneously have an electric steering mode.

FIG. 1 shows a schematic structural diagram of the dual-input steering device, which includes a frame 100 , a first power input device 300 , a second power input device 400 and a steering output shaft 200 . The frame 100 is fixed to the frame of the vehicle, the first power input device 300 , the second power input device 400 and the steering output shaft 200 are mounted on the frame 100 , and the steering output shaft 200 is connected to the first power input device 300 or the second power input The device 400 is used to obtain the power to realize the rotation and output the rotation to the steering gear of the vehicle.

The dual input steering device further includes a steering switching device 700 and a steering coupler 500 . The steering coupler 500 is disposed on the steering output shaft 200 and can move along the axial direction of the steering output shaft 200 while being fixed circumferentially with the steering output shaft 200 to realize synchronous rotation. The steering switching device 700 is installed on the frame 100 for driving the steering coupling 500 to move along the steering output shaft 200 as a whole. When the steering coupler 500 moves close to the first power input device 300 and is connected, the first power input device 300 drives the steering output shaft 200 to rotate; when the steering coupler 500 moves close to the second power input device 400 and is connected, the second power The input device 400 drives the steering output shaft 200 to rotate.

The first power input device 300 includes a first rotating mechanism and a first rotating member 320. The first rotating mechanism is used to drive the first rotating member 320 to rotate; the second power input device 400 includes a second rotating mechanism and a second rotating member 420. The two rotating mechanisms are used to drive the second rotating member 420 to rotate.

The first rotating member 320 and the second rotating member 420 are arranged along the steering output shaft 200, and neither the first rotating member 320 nor the second rotating member 420 interferes with the steering output shaft 200, but the first rotating member 320 and the second rotating member 420 do not interfere with the steering output shaft 200. The three components 420 and the steering output shaft 200 can rotate independently.

The steering coupler 500 includes a first coupler 510 and a second coupler 520. When the steering coupler 500 moves on the steering output shaft 200 as a whole, there are three situations: the first one is that the first coupler 510 is close to the first rotating element 320 and connected, at this time, the second coupling member 520 is separated from the second rotating member 420, and the first power input device 300 is used as the power source; the second is that the second coupling member 520 is close to the second rotating member 420 and connected, at this time, the first power input device 300 is used as the power source; A coupling member 510 is separated from the first rotating member 320, and the second power input device 400 is used as a power source; the third type is that the steering coupling 500 is located in the middle of the first rotating member 320 and the second rotating member 420, and the first coupling member 510 Separated from the first rotating member 320, the second coupling member 520 is separated from the second coupling member 520, at this time, neither the first power input device 300 nor the second power input device 400 can drive the steering.

In this embodiment, taking an old scooter as an example, the first power input device 300 is a manual steering mechanism, and the second power input device 400 is an electric steering mechanism. The above three modes are the manual steering mode, the electric steering mode and the Neutral mode. In other embodiments, the first power input device 300 and the second power input device 400 may also be other types of power sources, so as to have other types of power steering modes.

To facilitate installation, the rack 100 includes a first base 110 and a second base 120, the first power input device 300 is installed on the first base 110, the second power input device 400 is installed on the second base 120, and the steering output The shaft 200 is mounted on the second base 120 and one end protrudes from the second base 120 so as to be connected to the steering gear of the vehicle.

The first rotation mechanism of the first power input device 300 includes a driving shaft 310 and a steering wheel. The driving shaft 310 is rotatably mounted on the first base 110, one end of the driving shaft 310 is aligned with the steering output shaft 200, and the other end extends out of the first base 110. The base 110 is used to connect the steering wheel. It should be noted that it is the prior art that the steering wheel is arranged at the shaft end. Although it is not shown in the figure, it should be understood by those skilled in the art. The driving shaft 310 is coaxial with the steering output shaft 200 so that the rotational axes of the two are on the same straight line.

The part of the drive shaft 310 inside the frame 100 , that is, the end close to the steering output shaft 200 , has splines formed on its surface. The first rotating member 320 is sleeved on the driving shaft 310 and is provided with a matching key groove. Therefore, when the steering wheel rotates, the first rotating member 320 is driven to rotate by the driving shaft 310 .

Please refer to FIG. 2 and FIG. 3 again, the end of the driving shaft 310 is formed with an insertion hole 211 , and the end of the steering output shaft 200 is formed with an insertion rod 311 , and the insertion rod 311 is inserted into the insertion hole 211 to ensure that the steering output shaft 200 and the The drive shafts 310 are substantially on the same rotational axis. In addition, the insertion rod 311 is not in contact with the inner wall of the socket 211, that is, the insertion rod 311 and the socket 211 are in clearance fit to ensure that the two can rotate relatively freely without frictional interference.

A gasket 600 is arranged between the driving shaft 310 and the steering output shaft 200, and the gasket 600 is sleeved on the insertion rod 311 to block the end face of the steering output shaft 200 when the driving shaft 310 and the steering output shaft 200 are assembled, so that the driving shaft 310 and the outer surface of the steering output shaft 200 form an annular barrier. The annular blocking portion can restrict the movement of the first rotating member 320 to the steering output shaft 200 .

In order to keep the first rotating member 320 stable and prevent the first rotating member 320 from moving randomly along the driving shaft 310 , the first power input device 300 further includes a third elastic member 330 , and the third elastic member 330 abuts against the first rotating member 320 and the first base 110 .

1, 4 and 5, the second rotation mechanism of the second power input device 400 includes a steering motor 410, a driving gear 411 and a driven gear 412, the steering motor 410 is mounted on the second base 120, and the driving gear 411 is connected to the output end of the steering motor 410 , the driving gear 411 is formed outside the second rotating member 420 , and the second rotating member 420 is rotatably mounted on the second base 120 . The rotation of the steering motor 410 drives the driving gear 411 to rotate, and drives the driven gear 412 meshed with the driving gear 411 to rotate, thereby driving the second rotating member 420 to rotate.

The steering output shaft 200 includes a spline segment 210 , a mounting segment 220 and an output segment 230 in sequence along the axial direction. The mounting section 220 is rotatably mounted on the second base 120, specifically, the mounting section 220 is connected to the second rotating member 420 through a rotating bearing, so that the steering output shaft 200 is relatively fixedly mounted on the second base 120, and The steering output shaft 200 can freely rotate within the second rotating member 420 . The output end passes through the second base 120 to be located outside the frame 100 , and the spline segment 210 is positioned inside the frame 100 .

The first coupling part 510 and the second coupling part 520 of the steering coupler 500 are respectively formed with channels allowing the steering output shaft 200 to pass through, and the inner walls of the channels are formed with key grooves. The first coupling member 510 and the second coupling member 520 can not only move along the axial direction of the steering output shaft 200 , but also drive the steering output shaft 200 to rotate.

The steering coupling 500 further includes a first elastic member 530 and a second elastic member 540, the first elastic member 530 abuts between the first coupling member 510 and the second coupling member 520, and the second elastic member 540 abuts against the second elastic member 540. Between the coupling member 520 and the second rotating member 420 , the elastic force of the first elastic member 530 is greater than the elastic force of the second elastic member 540 .

The steering switching device 700 is a linear moving driving device, and the output end of the steering switching device 700 is connected to the first coupling member 510 . Of course, in other embodiments, the output end thereof can also be connected to the second coupling member 520 .

The output end of the steering switching device 700 is fixed to the first coupling member 510 in the axial direction, so that the first coupling member 510 can be driven to move along the steering output shaft 200 , and the output end thereof can be relative to the first coupling member 510 along its circumferential direction Rotate, so that when the first coupling member 510 rotates following the rotation of the first rotating member 320, the output end of the steering switching device 700 does not follow the rotation.

In order to prevent the output end of the steering switching device 700 from rotating with the first coupling member 510, optionally, the following connection methods are available:

For example, the output end of the steering switching device 700 may be a collar sleeved on the outside of the first coupling part 510 , and the collar is connected with the first coupling part 510 through a rotating bearing.

For another example, a circumferential annular groove 511 is formed on the outside of the first coupling member 510, and the output end of the steering switching device 700 is fitted in the circumferential annular groove 511. When the first coupling member 510 rotates, the output end of the steering switching device 700 remains fixed and moves along the circumferential annular groove. The slot 511 moves.

In this embodiment, the output end of the steering switching device 700 is connected with an arc-shaped shift fork 710, the arc-shaped shift fork 710 is arranged in the circumferential ring groove 511, and the two arms of the arc-shaped shift fork 710 extend along the circumferential ring groove 511 to clamp the first A coupling piece 510 is used to stabilize the connection between the arc-shaped shift fork 710 and the first coupling piece 510 and is not easy to disengage.

During installation, the first coupling member 510 can enter and exit from the opening of the arc-shaped shifting fork 710, and the two arms of the arc-shaped shifting fork 710 lift or pull down the first coupling member 510 at the same time, so that the force of the first coupling member 510 is more balanced. This facilitates the smooth movement of the first coupling member 510 .

The steering switching device 700 includes a switching motor 720, a lead screw 730 and a sliding table 740. The switching motor 720 is mounted on the first base 110 (in other embodiments, it can also be the second base 120), and the lead screw 730 is parallel to the steering output The shaft 200 is also connected to the output end of the switching motor 720 , the slide table 740 is provided with a nut (not shown in the figure) to make the slide table 740 fit with the lead screw 730 threadedly. The switching motor 720 drives the lead screw 730 to rotate, the sliding table 740 moves along the lead screw 730 , and drives the first coupling member 510 to move through the arc shift fork 710 .

In other embodiments, the linear movement driving device formed by the switching motor 720, the lead screw 730 and the sliding table 740 can be replaced by an air cylinder, a hydraulic cylinder, or the like.

The first coupling member 510 and the first rotating member 320 are engaged in transmission, and the second coupling member 520 and the second rotating member 420 are also engaged in transmission.

The structure of the first rotating member 320 is shown in FIG. 1 , FIG. 6 and FIG. 7 . One end of the first rotating member 320 faces the first base 110 , and the aforementioned third elastic member 330 abuts against the end and the first base 110 . A first concave portion 322 is formed on the other end of the first rotating member 320 between a base 110 .

The structure of the second rotating member 420 is shown in FIG. 1 and FIG. 8 . The second rotating member 420 is mounted on the second base 120 and has a second concave portion 421 formed at one end thereof.

The first coupling member 510 of the steering coupling 500 is formed with first protruding teeth 512 as shown in FIG. 9 , and the second coupling member 520 is formed with second protruding teeth 521 as shown in FIG. 10 . When the first coupling member 510 is close to the first rotating member 320 , the first convex teeth 512 are engaged with the first concave portion 322 ; when the second coupling member 520 is close to the second rotating member 420 , the second convex teeth 521 are engaged with the second concave portion 421.

The method of using the dual-input steering device is as follows.

Neutral Mode: When not in use, the dual input steering can be placed in neutral mode to avoid accidental actuation of steering.

In this mode, the switching motor 720 drives the first coupling member 510 to separate from the first rotating member 320 through the shifting fork, the first elastic member 530 is not compressed temporarily, and the second elastic member 540 supports the second coupling member 520 to rotate with the second Piece 420 separates. At this time, neither the steering wheel nor the steering motor 410 can drive the steering output shaft 200 to rotate.

Steering wears a lot of tires when not driving, and the neutral mode can solve this problem.

Manual steering mode: The switching motor 720 drives the first coupling member 510 to move toward the first rotating member 320 through the arc-shaped shifting fork 710 , so that the first convex teeth 512 of the first coupling member 510 fit in the first concave portion of the first rotating member 320 In 322 , when the steering wheel drives the driving shaft 310 to rotate, the steering output shaft 200 can be driven to rotate through the first rotating member 320 and the first coupling member 510 .

When the first coupling member 510 is close to the first rotating member 320 and the first protruding teeth 512 cannot be meshed in the first concave portion 322, the switching motor 720 can still rotate for a certain number of revolutions according to a predetermined setting, so that the first coupling member 510 Move to the right position, at this time, the first protruding teeth 512 push up the first rotating member 320, and the third elastic member 330 is compressed. Rotating the steering wheel drives the first rotating member 320 to rotate through the driving shaft 310. When the first rotating member 320 rotates to the position where the first concave portion 322 is aligned with the first convex teeth 512, the first rotating member 320 can fall down, and the first rotating member 320 It engages with the first coupling member 510 for transmission, and continues to turn the steering wheel to drive the steering output shaft 200 to turn.

Electric steering mode: the switching motor 720 drives the first coupling member 510 to move toward the direction of the second rotating member 420 through the arc-shaped fork 710 , and the first coupling member 510 pushes the second coupling member 520 to rotate toward the second through the first elastic member 530 When the member 420 moves, since the elastic force of the first elastic member 530 is greater than that of the second elastic member 540, the second elastic member 540 is compressed first, so that the second coupling member 520 is close to the second rotating member 420, and the second elastic member 520 is compressed. The protruding teeth 521 fit in the second concave portion 421 of the second rotating member 420, so that when the steering motor 410 is working, the second rotating member 420 is driven by the driving gear 411 and the driven gear 412, and is combined by the second rotating member 420 and the second rotating member 410. The component 520 drives the steering output shaft 200 to rotate.

In the process of switching to the electric steering mode, if the second coupling member 520 is blocked and cannot rotate, for example, when the second convex teeth 521 cannot be meshed in the second concave portion 421 exactly, at this time, the switching motor 720 is still It can be rotated for a certain number of revolutions according to a predetermined setting, so that the first coupling member 510 is moved in place, and the first elastic member 530 compresses and stores energy. At the same time, the steering motor 410 drives the second rotating member 420 to rotate. When the second rotating member 420 rotates to the position where the second concave portion 421 is aligned with the second convex teeth 521, the second coupling member 520 can fall down, and the second rotating member 420 and The second coupling member 520 engages in transmission, and the steering motor 410 continues to work to drive the steering output shaft 200 to turn.

Optionally, the dual-input steering device provided in this embodiment is further provided with a locking mechanism, a locking groove 321 is formed on the first rotating member 320, and the locking end of the locking mechanism is inserted into the locking groove 321, which can limit the A rotary member 320 is rotated, thereby locking the steering wheel.

The locking end of the locking mechanism can be moved parallel to the driving shaft 310 , for example, the locking end of the locking mechanism is a limit rod installed on the first base 110 , and the limit rod can move into the rack 100 And insert the locking groove 321 to restrict the rotation of the first rotating member 320 and the driving shaft 310 .

The locking end of the locking mechanism can also be moved perpendicular to the driving shaft 310, for example, the locking end of the locking mechanism is a limit rod installed on the first base 110, the limit rod can be close to or away from the driving shaft 310 , when the limiting rod is close to the driving shaft 310 , it can be locked into the locking groove 321 , thereby restricting the movement of the first rotating member 320 and the driving shaft 310 .

When the steering wheel is not required, such as in the neutral mode or the electric steering mode, the first rotating member 320 , the driving shaft 310 and the steering wheel can be restricted from rotating by the locking mechanism. Locking the steering wheel in the electric steering mode can also avoid safety risks. For example, in the electric steering mode, if the first coupling member 510 is not successfully separated from the first rotating member 320, the steering wheel may follow the steering motor 410. It is easy to cause accidental injury to the occupants of the vehicle.

In addition, when the vehicle is stopped, the dual-input steering device can also be put in the manual steering mode, and then the first rotating member 320 , the driving shaft 310 , the steering wheel and the steering output shaft 200 are restricted from rotating by the locking mechanism.

In order to clarify the steering angle output by the steering output shaft 200, the device is further provided with a steering angle detection device 800. The steering angle detection device 800 is used to detect the rotation angle of the steering output shaft 200, and feed back the detection result to the vehicle control system. The control system controls the on-board display to display angle information, so that the user can know the current steering angle.

In some embodiments, to better control steering accuracy, the diameter of the driving gear 411 is smaller than the diameter of the driven gear 412 . In order to facilitate steering control in the electric steering mode, the device is further provided with a motor rotation angle detection device 900, which is used to detect the rotation angle of the motor output shaft and feed back the detection result to the vehicle control system. Before use, the vehicle control system first compares the detection result of the motor rotation angle detection device 900 with the detection result of the steering angle detection device 800 , so as to calibrate the steering motor 410 . During driving, the motor rotation angle detection device 900 and the steering angle detection device 800 feedback the steering angle to the vehicle control system in real time to ensure that the steering motor 410 normally drives the steering output shaft 200 to rotate.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

1. A dual input steering device, characterized in that, comprising: frame; a steering output shaft, rotatably mounted on the frame; a steering coupler, comprising a first coupler and a second coupler, the first coupler and the second coupler are both circumferentially fixed and axially movably arranged on the steering output shaft; A first power input device, mounted on the frame, includes a first rotating mechanism and a first rotating member, the first rotating member is used for drivingly connecting with the first coupling member, and the first rotating mechanism is used for driving the first rotating member to rotate; A second power input device, mounted on the frame, includes a second rotating mechanism and a second rotating member, the second rotating member is used for drivingly connecting with the second coupling member, and the second rotating mechanism is used for driving the second rotating member to rotate; A steering switching device, mounted on the frame, for driving the steering coupling to move along the steering output shaft, so that the steering output shaft is connected to the first power input device or the second power input device . 2 . The dual-input steering device according to claim 1 , wherein the steering coupling further comprises a first elastic member and a second elastic member, and the first elastic member abuts against the first coupling member. 3 . and the second coupling member, the second elastic member abuts between the second rotating member and the second coupling member, and the elastic force of the first elastic member is greater than the elastic force of the second elastic member ; The output end of the steering switching device is axially fixed and circumferentially rotatably connected to the first coupling member. 3 . The dual-input steering device according to claim 2 , wherein the first coupling member is sleeved on the steering output shaft and is matched with the steering output shaft keyway, and the first coupling member has a keyway. 4 . A circumferential ring groove is formed on the outer peripheral surface; The output end of the steering switching device is fitted in the circumferential annular groove. 4 . The dual-input steering device according to claim 3 , wherein the steering switching device comprises an arc-shaped shifting fork, the arc-shaped shifting fork is connected to the output end of the steering switching device, and the arc-shaped shifting fork is connected to the output end of the steering switching device. 5 . A shift fork extends along the circumferential annular groove. 5 . The dual-input steering device according to claim 1 , wherein the first rotating mechanism comprises a driving shaft and a steering wheel, the driving shaft is rotatably mounted on the frame, and the rotation of the driving shaft is rotatable. 6 . The axis is on a straight line with the rotation axis of the steering output shaft, the steering wheel is mounted on the end of the driving shaft away from the steering output shaft, and the first rotating member is mounted on the driving shaft close to the steering output one end of the shaft. 6 . The dual-input steering device according to claim 5 , wherein an insertion rod is formed at the end of the driving shaft, an insertion hole is formed at the end of the steering output shaft, and the insertion rod is gap-fitted with 6 . the jack. 7 . The dual-input steering device according to claim 5 , wherein the driving shaft is matched with the keyway of the first rotating member, and the first rotating member is engaged with the first coupling member for transmission. 8 . 8 . The dual-input steering device according to claim 7 , wherein the first power input device further comprises a third elastic member, the third elastic member abuts against the frame and the first between the rotating parts. 9 . The dual-input steering device according to claim 1 , wherein the second rotating mechanism comprises a steering motor, a driving gear and a driven gear, the steering motor is mounted on the frame, and the driving gear The output end of the steering motor is connected, and the driven gear meshes with the driving gear; The second rotating member is rotatably mounted to the frame, and the driven gear is formed outside the second rotating member. 10 . The dual-input steering device according to claim 2 , wherein the steering switching device further comprises a switching motor, a lead screw and a nut, the switching motor is mounted on the frame, and the lead screw is parallel to 10 . For the steering output shaft, the nut is threadedly fitted with the lead screw and connected to the first combination piece.

Images