Inner gear ring type corner limiting device, steer-by-wire system comprising same and vehicle

Abstract

The utility model discloses an inner gear ring type corner limiting device, a steer-by-wire system comprising the same and a vehicle, and the corner limiting device is characterized in that a driving gear is fixed on a rotating shaft, and the driving gear is meshed with a rotatable inner gear ring so as to drive the inner gear ring to rotate. The rotating angle range of the inner gear ring is limited through a limiting pair between the inner gear ring and the shell so as to limit the rotating angle range of the driving gear and the rotating shaft, blind teeth can be machined on the inner gear ring to limit the rotating angle range of the driving gear and the rotating shaft, and the auxiliary rotating angle limiting effect is achieved. When the turning angle limiting mechanism is applied to a steer-by-wire system of a vehicle, turning angle limiting of a steering wheel can be reliably achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical position limiting technical field, especially a kind of corner limiting mechanism and the vehicle line control steering system, vehicle comprising it. BACKGROUND

[0002] Corner limiting mechanism refers to the mechanism that the relative rotation between components is limited by mechanical device to meet the specific angle limiting function requirement.For example: in the line control steering system of automobile, since there is no mechanical connection (steering intermediate shaft) between steering control mechanism (steering wheel and steering column) and steering execution mechanism (lower steering gear), the traditional steering limiting mode cannot work, if only rely on software control line control steering system's feeling motor to limit steering angle by generating limit steering resistance, in many cases, there is the risk of driving safety or the risk of damaging other electronic components in steering wheel, so corner limiting mechanical device is needed to reliably limit the continuous rotation of steering wheel when it rotates to the designed maximum angle. SUMMARY

[0003] In order to solve the problems in the above background art, the utility model provides a kind of inner tooth ring type corner limiting device and the line control steering system, vehicle comprising it, its corner limiting mechanism can realize the steering wheel corner limiting of vehicle line control steering system, so as to avoid the potential driving safety problems caused by damaging electronic devices and the potential driving safety problems caused by the steering angle of steering wheel exceeding the designed range in line control steering system.Furthermore, a line control steering system and vehicle comprising the corner limiting device are provided.

[0004] The utility model is realized through the following technical schemes:

[0005] The utility model relates to a kind of inner tooth ring type corner limiting device, comprising: driving gear, inner tooth ring, shell and shell cover, wherein: driving gear is coaxially fixed on the rotation of its rotation shaft, driving gear and inner tooth ring form meshing pair, the relative position of rotation shaft axis and shell is fixed, rotation shaft and driving gear rotate and drive inner tooth ring rotate in the circular cavity formed by shell and shell cover.

[0006] Between inner tooth ring and shell or shell cover, limiting pair blocks the continuous rotation of inner tooth ring in limit angle position, to realize the angle limiting of rotation shaft.

[0007] Optionally, blind teeth can also be processed on the inner tooth ring, in the case that limiting pair limiting fails, the angle limiting of rotation shaft is realized by blind teeth limiting the continuous rotation of driving gear, to play the function of auxiliary limiting rotation shaft angle range.

[0008] Optionally, the inner tooth ring and shell are radially positioned and rotationally supported by circumferential surface, and the circumferential surface is provided with lubricating coating or grease layer for sliding bearing.

[0009] Optionally, the drive gear is fixed to the rotating shaft by means of splines, flat keys, etc., or the drive gear is directly machined at the end of the steering shaft.

[0010] Optionally, the limiting pair consists of a pair of limiting blocks (protrusions); or it can be a mechanical device consisting of a limiting block (protrusion) and a limiting groove, or a device that mutually blocks and limits the movement.

[0011] This utility model relates to a steer-by-wire system, including the aforementioned internal gear ring type angle limiting device and a steering wheel fixedly connected to the rotating shaft of the angle limiting device.

[0012] This utility model relates to a vehicle, including the above-mentioned steer-by-wire system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the corner limiting device of the present invention, which is limited by the upper limit pair of the internal gear ring;

[0014] Figure 2 This is a schematic diagram of the angular limiting device of this utility model, which uses two methods of limiting: the limiting pair and the blind tooth on the internal gear ring.

[0015] Figure 3 This is a schematic diagram showing the radial positioning and rotational support between the internal gear ring and the housing of the corner limiting device in this utility model via needle roller bearings.

[0016] Figure 4 Figure 5 This is a schematic diagram of the cornering limit device of this utility model installed on the automotive steering-by-wire system. Detailed Implementation

[0017] like Figure 1 The diagram shows a rotational limiting device with an upper limit block on an internal gear ring. A spline is machined at the end of the rotating shaft 1, which is connected and fixed to the drive gear 3 via the spline. The rotating shaft 1 drives the drive gear 3 to rotate. The drive gear 3 and the internal gear ring 4a form a gear pair. The internal gear ring 4a is installed inside the housing 2 of the rotational limiting device. After the cover 5 and the housing 2 are bolted together, a cylindrical cavity is formed, within which the internal gear ring 4a can rotate. A non-through groove 6 is machined on the inner end face of the housing 2, and a limit block 7 is fixed on the end face of the internal gear ring 4a. In the assembled state, the limit block 7 of the internal gear ring 4a is embedded in the groove 6 of the housing 2. When the internal gear ring 4a rotates, it drives the limit block 7 to make a circular motion. When the limit block 7 reaches both ends of the groove 6, the ends of the groove 6 will hinder the continued movement of the limit block 7, thereby limiting the continued rotation of the internal gear ring 4a and thus limiting the rotational range of the rotating shaft 1 and the drive gear 3.

[0018] likeFigure 2 As shown, the internal gear ring 4b can also have both a limiting block 7 and a blind tooth 8. When the limiting block of the internal gear ring 4b fails to be blocked by the end of the groove 6 of the housing 2, the drive gear 3 rotates to the blind tooth 8 of the internal gear ring 4b and is blocked by the blind tooth 8, which plays an auxiliary limiting role and realizes a more reliable steering angle limiting function.

[0019] The drive gear 3 can be fixed to the rotating shaft 1 by means of splines, flat keys, etc., or directly machined at the end of the rotating shaft 1.

[0020] The limiting groove can be arranged on the inner end face of the housing or on the inner surface of the cover 5. Depending on the arrangement of the limiting groove, the limiting block 7 is installed at the corresponding position of the internal gear ring 4. The limiting block (protrusion) can also be fixedly arranged on the housing or cover, with the limiting groove arranged on the end face of the internal gear ring.

[0021] The specific design of the limit pair is not limited to the methods mentioned above; multiple limit pairs can even be set to provide more reliable limit protection.

[0022] The internal gear ring 4 (4a or 4b) is radially positioned with the housing 2 via a circumferential surface. A lubricating coating or grease can be applied to the circumferential contact surface to form a sliding bearing; or the internal gear ring 4 and the housing 2 are radially positioned and rotatedly supported by a rolling bearing. Figure 3 The specific embodiment uses a needle roller bearing 9 for radial positioning and rotational support.

[0023] like Figure 4 As shown, the housing 2 of the angle limiting device can be integrally machined with the housing 11 of the steer-by-wire system feel simulator. Alternatively, the housing 2 of the angle limiting device can be independent and fixed to the housing of the steer-by-wire system feel simulator by bolts.

[0024] Figure 5 This is a schematic diagram of the steering angle limiting device mounted on the steering column. The rotating shaft 1 is fixed inside the steering system feel simulator 11 via bearings. The steering wheel 10 is fixedly connected to the rotating shaft 1, driving the drive gear 3 to rotate. The drive gear 3 then drives the driven internal gear ring 4 to rotate. When the steering wheel rotates clockwise or counterclockwise to its limit angle, the internal gear ring 4 contacts the limiting pair of the housing 2 of the angle limiting device, preventing further rotation and thus limiting the steering wheel's angle.

[0025] The above-described specific implementations can be partially adjusted by those skilled in the art in different ways without departing from the principles and purpose of this utility model. The scope of protection of this utility model is determined by the claims and is not limited to the above-described specific implementations. All implementation schemes within its scope are bound by this utility model.

Claims

1. An internal gear ring type corner limiting device, characterized in that, include: The components include a rotating shaft, a drive gear, an internal gear ring, a housing, and a cover. One end of the rotating shaft is coaxially and fixedly connected to the drive gear inside the housing. The axis of the rotating shaft is fixedly positioned relative to the housing. The drive gear and the internal gear ring form a meshing pair. The internal gear ring is movably disposed within the cavity formed by the housing and the cover. A limiting pair for limiting the angle of the rotating shaft is provided between the internal gear ring and the housing or cover; The internal gear ring has blind teeth used to limit the angle of the shaft by restricting the continued rotation of the drive gear.

2. The internal gear ring type angle limiting device according to claim 1, characterized in that, The internal gear ring and the housing are radially positioned and rotated and supported by a circumferential surface, which is provided with a lubricating coating or grease layer for sliding bearings.

3. The internal gear ring type angle limiting device according to claim 1, characterized in that, A rolling bearing for radial positioning and rotational support is provided between the internal gear ring and the housing.

4. The internal gear ring type angle limiting device according to claim 1, characterized in that, The statement that one end of the rotating shaft is coaxially and fixedly connected to the drive gear inside the housing means that the end of the rotating shaft is provided with a spline or flat key for fixing the drive gear, or the drive gear and the rotating shaft are an integrated structure.

5. The internal gear ring type angle limiting device according to claim 1, characterized in that, The aforementioned limiting pair is a pair of limiting blocks or a limiting block and a limiting groove used to mutually block and limit each other.

6. A steer-by-wire system, characterized in that, The device includes an internal gear ring type corner limiting device as described in any one of claims 1-5, and a steering wheel fixedly connected to the rotating shaft of the internal gear ring type corner limiting device.

7. A vehicle, characterized in that, Includes the steer-by-wire system as described in claim 6.

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