Corner limiting unit of moment road feel feedback device

Abstract

The utility model discloses a rotation angle limiting unit of a moment road sense feedback device. The rotation angle limiting unit comprises a shell, a gear shaft and an angle limiting ring. The shell is provided with a first bearing inner hole and a second bearing inner hole, the second bearing inner hole is located in the outer side of the shell, the first bearing inner hole is located in the inner side of the shell, a first bearing is arranged in the first bearing inner hole, the gear shaft is connected with the inner diameter of the first bearing in a matched mode, a first boss is arranged in the second bearing inner hole, and a second boss is arranged on the outer side of the angle limiting ring. The angle limiting ring is located in an inner hole of the second bearing, and the gear shaft is connected with the inner gear of the angle limiting ring in a matched mode. By means of the reduction ratio of the gear of the gear shaft, the first boss and the second boss, rotation angle limiting of the steering wheel is achieved, the structure is high in reliability, compact in design, high in structural rigidity and high in steering angle range precision, and the rotation angle limiting unit is in transmission through the inner meshing gear and the bearing, smooth in rotation and small in influence on steering torque.

Description

Technical Field

[0001] The utility model relates to the technical field of wire-controlled steering, in particular to a turning angle limiting unit of a torque road sense feedback device. Background Art

[0002] With the development of automobile intelligence and autonomous driving functions, the wire-controlled steering system is increasingly widely used in the field of automobile steering. The wire-controlled steering system includes a steering column, a torque feedback device and a steering actuator. Since there is no direct mechanical connection between the steering column and the steering actuator, the steering wheel angle limit needs to be realized through an angle limit unit.

[0003] The corner limit unit is a new design, and its design has the problems of complex structure, large space occupation, many parts, complex assembly process and high cost. Therefore, a corner limit unit with simple and reliable structure, easy installation and low cost has broad market application prospects. Utility Model Content

[0004] In view of the deficiencies existing in the above problems, the utility model provides a corner limiting unit of a torque road sense feedback device.

[0005] To achieve the above-mentioned purpose, the utility model provides a rotation angle limiting unit of a torque road sense feedback device, comprising a housing, a gear shaft and an angle limiting ring;

[0006] In which, the shell is provided with a first bearing inner hole and a second bearing inner hole, the first bearing inner hole is connected to the second bearing inner hole and the second bearing inner hole is located on the outside of the shell, the first bearing inner hole is located on the inside of the shell, the first bearing inner hole is provided with a first bearing and the gear shaft is matched and connected with the inner diameter of the first bearing, the second bearing inner hole is provided with a first boss, the outer side of the angle limit ring is provided with a second boss, and the inner side is provided with an internal gear, the angle limit ring is located in the second bearing inner hole and the gear shaft is matched and connected with the internal gear of the angle limit ring.

[0007] Preferably, a first bearing position and an external gear are provided on the gear shaft, and the first bearing position and the first bearing inner hole are connected by a first bearing.

[0008] Preferably, a first slot is provided on the gear shaft, a second slot is provided on the housing, a first retaining ring is provided in the first slot, and a second retaining ring is provided in the second slot.

[0009] Preferably, the angle limiting ring and the inner hole of the second bearing are coaxial and a second bearing seat is provided on the outer side of the angle limiting ring, the second bearing seat is cooperatively connected with the second bearing and the second bearing is cooperatively connected with the inner hole of the second bearing.

[0010] Preferably, a third retaining groove is provided on the angle limiting ring, and the third retaining ring is provided in the third retaining groove, and the third retaining ring is used to limit the axial movement of the second bearing.

[0011] Preferably, the angle between the two opposite side surfaces of the first boss is α, and the angle between the two opposite side surfaces of the second boss is β.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model realizes the steering angle limitation of the steering wheel through the reduction ratio of the gear shaft gear, the first boss and the second boss. The structure has high reliability, compact design, high structural rigidity, and high steering angle range accuracy. The steering angle limiting unit is driven by the internal meshing gear and the bearing, and the rotation is smooth, which has little effect on the steering torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of the corner limiting unit of the torque road sense feedback device of the utility model;

[0015] Figure 2 It is a schematic diagram of the housing structure in the corner limit unit of the torque road sense feedback device of the utility model;

[0016] Figure 3 This is a schematic diagram of the cooperation between the housing and the gear shaft in the corner limit unit of the torque road sense feedback device of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the angle limiting ring in the corner limiting unit of the torque road sense feedback device of the utility model;

[0018] Figure 5 The utility model is a schematic diagram of the structure of the torque road sense feedback device of the wire control steering system. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The following is combined with Figure 1 The utility model is further described in detail:

[0023] like Figure 1 As shown, the utility model provides a rotation angle limiting unit of a torque road sense feedback device, comprising a housing 3, a gear shaft 9 and an angle limiting ring 6;

[0024] Reference Figure 2 The housing 3 is provided with a first bearing inner hole 3-3 and a second bearing inner hole 3-4. The first bearing inner hole 3-3 is connected with the second bearing inner hole 3-4 and the second bearing inner hole 3-4 is located on the outside of the housing 3. The first bearing inner hole 3-3 is located on the inside of the housing 3. The first bearing inner hole 3-3 is provided with a first bearing 5 and the gear shaft 9 is matched with the inner diameter of the first bearing 5. The second bearing inner hole 3-4 is provided with a first boss 3-1, the outer side of the angle limiting ring 6 is provided with a second boss 6-1, and the inner side is provided with an internal gear 6-2. The angle limiting ring 6 is located in the second bearing inner hole 3-4 and the gear shaft 9 is matched with the internal gear 6-2 of the angle limiting ring 6.

[0025] Reference Figure 3 The gear shaft 9 is provided with a first bearing position 9-1, an external gear 9-2 and a tooth number Z1. The first bearing position 9-1 and the first bearing inner hole 3-3 are connected by the first bearing 5.

[0026] Specifically, a first slot is provided on the gear shaft 9, a second slot is provided on the housing 3, a first retaining ring 10 is provided in the first slot, a second retaining ring 4 is provided in the second slot, and the retaining ring 4 and the retaining ring 10 limit the axial movement of the first bearing 5. The bearing shoulder of the gear shaft 9 and the first retaining ring 10 limit the axial movement of the gear shaft 9, the gear shaft 9 and the first bearing inner hole 3-3 are coaxial, and the gear shaft 9 rotates around the axis of the first bearing inner hole 3-3.

[0027] Reference Figure 4 The angle limiting ring 6 is coaxial with the second bearing inner hole 3-4 and a second bearing position 6-3 is provided on the outer side of the angle limiting ring 6. The second bearing position 6-3 is matched and connected with the second bearing 7 and the second bearing 7 is matched and connected with the second bearing inner hole 3-4.

[0028] Preferably, a third slot is provided on the angle limiting ring 6, and a third retaining ring 8 is provided in the third slot, and the third retaining ring 8 is used to limit the axial movement of the second bearing 7. The angle limiting ring 6 is coaxial with the inner hole 3-4 of the second bearing, and the angle limiting ring 6 rotates around the inner hole 3-4 of the second bearing.

[0029] In this embodiment, the angle between the two opposite side surfaces 3-1-1 and 3-1-2 of the first boss 3-1 is α, and the angle between the two opposite side surfaces 6-1-1 and 6-2-2 of the second boss 6-1 is β. The angle limit ring 6 is provided with an internal gear 6-2 with a number of teeth Z2. The internal gear 6-2 and the external gear 9-2 are a set of internal meshing gears with a reduction ratio of Z2 / Z1. When the steering wheel drives the gear shaft 9 to rotate, the external gear 9-2 of the gear shaft 9 drives the internal gear 6-2 of the angle limit ring 6 to rotate, and at the same time, the second boss 6-1 on the angle limit ring 6 also rotates. When the angle limit ring 6 rotates until the side surface 6-1-1 or 6-1-2 of the second boss 6-1 contacts the side surface 3-1-2 or 3-1-1 of the first boss 3-1, the angle limit ring 6 cannot continue to rotate. The same applies when the steering wheel rotates in the opposite direction. At this time, the rotation angle range of the steering wheel is θ = (Z2 / Z1) × 360° - (α + β). By adjusting Z1, Z2, α and β, the rotation angle range of the steering wheel can be adjusted.

[0030] In this embodiment, an end cover 11 is further included. The end cover 11 is provided with screw holes. Screws 12 are fastened in screw holes 3 - 6 of the housing 3 through screw holes 11 - 1 to fasten the end cover 11 to the end surface of the housing 3 .

[0031] Reference Figure 5 In this embodiment, the steering wheel is connected to the steering column 1 , the steering column 1 is connected to the torque feedback device 2 , and the torque feedback device 2 is provided with a housing 3 .

[0032] The assembly process of the device includes:

[0033] The bearing 5 is installed into the bearing hole 3 - 3 of the housing 3 , and the retaining ring 4 is installed into the groove 3 - 5 of the housing 3 .

[0034] The gear shaft 9 and its components are passed through the inner hole of the bearing 5, and the retaining ring 10 is installed in the groove of the gear shaft 9. Here, the gear shaft 9 can also be fastened to the bearing 5 by means of riveting or nut locking.

[0035] Install the bearing 7 on the bearing position 6 - 3 of the angle limiting ring 6 , and install the retaining ring 8 into the groove 6 - 4 of the angle limiting ring 6 .

[0036] The bearing 7 is installed in the bearing hole 3-4 of the housing 3, and the outer end surface of the bearing hole 3-4 of the housing 3 is riveted to fasten the bearing 7 in the bearing hole 3-4. Here, the bearing 7 can also be fastened in the bearing hole 3-4 by nut locking, retaining ring, outer end cover pressing, etc.

[0037] The end cover 11 is mounted on the rear end surface of the housing 3, the threaded holes are aligned, and the screws 12 are tightened through the screw holes to fasten the end cover 11 to the housing 3. The corner limiting unit is assembled.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A corner limiting unit of a torque road sense feedback device, characterized in that: It includes a housing, a gear shaft and an angle limiting ring; In which, the housing is provided with a first bearing inner hole and a second bearing inner hole, the first bearing inner hole is connected to the second bearing inner hole and the second bearing inner hole is located on the outside of the housing, the first bearing inner hole is located on the inside of the housing, a first bearing is provided in the first bearing inner hole and the gear shaft is matched with the inner diameter of the first bearing, a first boss is provided in the second bearing inner hole, a second boss is provided on the outside of the angle limiting ring, and an internal gear is provided on the inside, the angle limiting ring is located in the second bearing inner hole and the gear shaft is matched with the internal gear of the angle limiting ring.

2. The corner limiting unit of the torque road sense feedback device according to claim 1, characterized in that: The gear shaft is provided with a first bearing seat and an external gear, and the first bearing seat and the first bearing inner hole are connected by a first bearing.

3. The corner limiting unit of the torque road sense feedback device according to claim 2, characterized in that: The gear shaft is provided with a first slot, the housing is provided with a second slot, a first retaining ring is provided in the first slot, and a second retaining ring is provided in the second slot.

4. The corner limiting unit of the torque road sense feedback device according to claim 3, characterized in that: The angle limiting ring and the inner hole of the second bearing are coaxial and a second bearing seat is provided on the outer side of the angle limiting ring. The second bearing seat is cooperatively connected with the second bearing and the second bearing is cooperatively connected with the inner hole of the second bearing.

5. The corner limiting unit of the torque road sense feedback device according to claim 4, characterized in that: A third retaining groove is provided on the angle limiting ring, and a third retaining ring is provided in the third retaining groove. The third retaining ring is used to limit the axial movement of the second bearing.

6. The corner limiting unit of the torque road sense feedback device according to claim 5, characterized in that: The angle between the two opposite side surfaces of the first boss is α, and the angle between the two opposite side surfaces of the second boss is β.

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