TWI432353B - Steering angle superimposed drive device - Google Patents

Description

Steering angle superimposed drive

The present invention relates to a driving device, and more particularly to a driving device in which a steering angle is superimposed.

A prior art steering angle superimposed drive device, as shown in US Pat. No. 7,275,512, for connecting to a steering system of a vehicle having a first drive rod and a second drive spaced axially apart a first driving rod for connecting a steering wheel, the second driving rod for connecting a gear set that rotates the wheel, the driving device includes a first driving member connected to the first driving rod, and a connection a second driving member and a second driving member driven by the first driving member, the first driving member has a first housing connected to and cooperating with the first driving rod, and is disposed in the first housing a motor rotor disposed coaxially with the first driving rod, and a clutch connecting the motor rotor, the second driving rod has a connecting member connecting the motor rotor, and a connecting the connecting member and the second driving rod Two shells.

When the clutch is fixed such that the motor rotor cannot rotate relative to the first housing, the rotation from the first driving member interlocks the first housing, the motor rotor, the connecting member, the second housing, and the first The two drive rods are rotated to enable the second drive rod to rotate at the same speed as the first drive rod.

When the clutch is not fixed to rotate the motor rotor relative to the first housing, the second driving rod is affected by the rotation speed of the motor rotor and is different from the rotation speed of the first driving rod, so that the second driving rod can be adjusted. The vehicle When driving at a high speed and a low speed, respectively, the first driving rod driven by the steering wheel can rotate the second driving rod at a low speed and a high speed respectively at the same rotation speed, thereby ensuring safety when turning. .

However, the coaxially designed motor rotor itself has no locking function, and must be switched with the clutch to enable the second driving rod to switch between the same speed and different speeds as the first driving rod. The structure is complex and cannot reduce costs.

Accordingly, it is an object of the present invention to provide a drive unit having a steering angle superposition with a self-locking function.

Therefore, the steering angle superimposed driving device of the present invention is applied to a steering system of a vehicle, the steering system having a first driving rod and a second driving rod disposed at a first axial interval, the driving device including a fixing a unit, a drive motor, and a connection unit.

The fixing unit is connected and rotated by the linkage of the first driving rod, the driving motor includes a motor body mounted to the fixing unit, and a second axial extension that is different from the first axial direction and is opposite to the a motor rotating shaft of the motor body, the connecting unit is respectively connected to the fixing unit, the motor rotating shaft and the second driving rod, and is driven by the motor rotating shaft to rotate the second driving rod.

The utility model has the advantages that the motor rotating shaft and the connecting unit are arranged in different axial directions, so that the motor rotating shaft has a self-locking function, which can simplify the production.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to Figures 1, 2, and 3, the preferred embodiment of the steering angle superimposed drive apparatus of the present invention is applied to a steering system 21 of a vehicle 2 having a first one disposed at a first axial X interval. The driving rod 211 and a second driving rod 212, and a steering wheel 213 connected to the first driving rod 211, the driving device comprises a fixing unit 3, a driving motor 4, and a connecting unit 5.

The fixing unit 3 is connected and rotated by the linkage of the first driving rod 211, and includes a main frame body 31 connected and rotated by the linkage of the first driving rod 211, and the main frame body 31 is opposite to the main frame body 31. a shaft hole 32 rotatably provided on one side of a driving rod 211, an opening 33 in the main frame body 31 and communicating with the shaft hole 32, and a through hole in the main frame body 31 Hole 34.

The drive motor 4 includes a motor body 41 mounted to the fixed unit 3, and a motor shaft 42 extending toward a second axial direction Y perpendicular to the first axial direction X and rotatable relative to the motor body 41.

The motor shaft 42 passes through the through hole 34 and has a worm portion 421 surrounding its own axis and adjacent to the opening 33.

The connecting unit 5 is connected to the fixed unit 3, the motor rotating shaft 42 and the second driving rod 212, and is driven by the motor rotating shaft 42 to rotate the second driving rod 212, and includes a rotatably disposed on the Shaft hole 32 a rotating shaft 51, a worm wheel portion 52 surrounding the rotating shaft 51 and meshing with the worm portion 421, a connecting shaft 53 extending outward from the rotating shaft 51 and connecting the second driving rod 212, and two sleeves The rotating shaft 51 is located on both sides of the worm wheel portion 52 to connect the bearing 54 of the main frame body 31.

When the driving motor 4 is not in operation, the rotation of the first driving rod 211 causes the fixing unit 3 and the driving motor 4 to rotate, because the worm portion 421 of the motor rotating shaft 42 is not coaxial with the worm wheel portion 52 of the connecting unit 5. Therefore, a self-locking function is formed to prevent the motor shaft 42 from rotating relative to the motor body 41. Therefore, the motor shaft 42 is interlocked with the worm portion 421 to rotate the motor body 41. The unit 5 rotates with the fixed unit 3 at the same time, and the second driving rod 212 is rotated. The rotation speed of the second driving rod 212 is the same as the rotation speed of the first driving rod 211.

When it is necessary to adjust the rotation angle of the second driving rod 212 relative to the first driving rod 211, that is, when the rotation speed of the second driving rod 212 is different from the rotation speed of the first driving rod 211, only the driving needs to be driven. When the motor 4 is operated such that the connecting unit 5 driven by the motor rotating shaft 42 is in the same direction or opposite direction as the rotating direction of the first driving rod 211, the angle at which the second driving rod 212 actually rotates (ie, the steering of the vehicle 2) The angle between the rotation angle of the first driving rod 211 and the rotation angle of the connecting unit 5 driven by the motor rotating shaft 42 relative to the fixing unit 3, thereby achieving the effect of superposition of the steering angle, thereby By controlling the operation of the drive motor 4, the vehicle 2 can be driven by the steering wheel 213 at the same number of revolutions at high speed and low speed, respectively, and the second drive can be driven at the same speed. The rotation speed of the rod 212 is respectively rotated at a low speed and a high speed to ensure safety when the vehicle turns.

In summary, the motor shaft 42 has different self-locking functions and can be simplified by the arrangement of the motor shaft 42 and the connecting unit 5 in different axial directions. Compared with the existing steering angle driving device, the present invention The worm portion 421 and the worm wheel portion 52 in different axial directions can be self-locking by the mechanism, and the safety of use can be further improved, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2‧‧‧ Vehicles

21‧‧‧Steering system

211‧‧‧First drive rod

212‧‧‧Second drive rod

213‧‧‧Steering wheel

3‧‧‧Fixed unit

31‧‧‧Main frame

32‧‧‧Axis hole

33‧‧‧ openings

34‧‧‧through holes

4‧‧‧Drive motor

41‧‧‧Motor body

42‧‧‧Motor shaft

421‧‧‧ worm part

5‧‧‧ Connection unit

51‧‧‧Rotary axis

52‧‧‧ worm gear

53‧‧‧Connected shaft

54‧‧‧ bearing

X‧‧‧first axial direction

Y‧‧‧second axial

1 is a perspective view of a preferred embodiment of a driving apparatus for steering angle superposition according to the present invention; FIG. 2 is a partial perspective view of the preferred embodiment; and FIG. 3 is a view showing a state of use of the preferred embodiment.

3‧‧‧Fixed unit

31‧‧‧Main frame

32‧‧‧Axis hole

33‧‧‧ openings

34‧‧‧through holes

4‧‧‧Drive motor

41‧‧‧Motor body

42‧‧‧Motor shaft

5‧‧‧ Connection unit

51‧‧‧Rotary axis

X‧‧‧first axial direction

Y‧‧‧second axial

Claims (5)

A steering angle superimposed driving device is applied to a steering system of a vehicle, the steering system has a first driving rod and a second driving rod disposed at a first axial interval, and the driving device comprises: a fixing unit, Connecting and rotating by the linkage of the first driving rod; a driving motor comprising a motor body mounted to the fixing unit, and a second axial extension extending from the first axial direction and opposite to the motor body a rotating motor shaft; and a connecting unit respectively connected to the fixing unit, the motor rotating shaft and the second driving rod, and being driven by the motor rotating shaft to rotate the second driving rod; the fixing unit comprises a connection and a main frame body rotated by the first driving rod, a shaft hole located on a side of the main frame opposite the first driving rod and rotatably provided by the connecting unit, and a main frame body An opening that communicates with the shaft hole, the motor shaft has a worm portion surrounding the axis of the axis and adjacent to the opening, the connecting unit includes a rotating shaft rotatably disposed on the shaft hole, and a surrounding The rotation shaft and the worm wheel portion and the worm portion engaged with each other. The steering angle superimposed driving device according to claim 1, wherein the connecting unit further comprises a connecting shaft extending outward from the rotating shaft and connecting the second driving rod. The driving device of the steering angle superposition according to claim 1, wherein the connecting unit further comprises two sleeves disposed on the rotating shaft and respectively The bearings of the main frame body are connected to both sides of the worm wheel portion. The driving device of the steering angle superimposition according to the first aspect of the invention, wherein the fixing unit further comprises a through hole for the main frame body and for the motor shaft to pass through. The steering angle superimposed driving device according to claim 1, wherein the second axial direction is perpendicular to the first axial direction.