Corner limiting mechanism, steering system and vehicle

Abstract

The invention relates to a corner limiting mechanism, a steering system and a vehicle, the corner limiting mechanism comprises a shell, a connecting cylinder and a limiting assembly, a mounting cavity is formed in the shell, the connecting cylinder is arranged in the mounting cavity and can rotate relative to the mounting cavity, a connecting part is arranged on the outer wall of the connecting cylinder, and the limiting assembly comprises a fixing part and a rotating part; the fixing part is fixedly installed in the installation cavity and provided with a fixing part, the rotating part is rotatably arranged outside the connecting cylinder in a sleeving mode, the connecting cylinder is provided with a left limit position and a right limit position, and when the connecting cylinder is located between the left limit position and the right limit position, the connecting cylinder can drive the rotating part to rotate relative to the installation cavity. At any one of the left limit position and the right limit position, the connecting part abuts against the rotating part in the circumferential direction of the connecting cylinder, and the rotating part abuts against the fixing part in the circumferential direction of the connecting cylinder so as to limit the connecting cylinder to rotate relative to the mounting cavity. The corner limiting mechanism is simple in structure, and the production cost of the corner limiting mechanism can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a turning angle limiting mechanism, a steering system and a vehicle. Background Art

[0002] In the vehicle's steering system, manufacturers usually add an angle limiting mechanism to limit the steering wheel's rotation angle range. The limiting mechanism can prevent the driver from turning the steering wheel clockwise or counterclockwise to a certain angle, thereby protecting the vehicle's steering system and ensuring driving safety.

[0003] In the related art, the rotation angle limiting mechanism adopts a nut screw form and a planetary gear assembly form, etc., but the above-mentioned design schemes have a complex structure, which increases the production cost of the rotation angle limiting mechanism. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a corner limiting mechanism, which has a simple structure and is conducive to reducing the production cost of the corner limiting mechanism.

[0006] An embodiment of the present invention further provides a steering system.

[0007] An embodiment of the present invention further provides a vehicle.

[0008] The angle limiting mechanism of an embodiment of the present invention comprises: a shell, a mounting cavity is provided in the shell; a connecting tube, the connecting tube is provided in the mounting cavity and is rotatable relative to the mounting cavity, and a connecting portion is provided on the outer wall of the connecting tube; a limiting assembly, the limiting assembly comprises a fixing part and a rotating part, the fixing part is fixedly installed in the mounting cavity, the fixing part has a fixing portion, and the rotating part is rotatably sleeved on the outside of the connecting tube, the connecting tube has a left limit position and a right limit position, when between the left limit position and the right limit position, the connecting tube can drive the rotating part to rotate relative to the mounting cavity, when either the left limit position or the right limit position is reached, the connecting portion stops the rotating part along the circumference of the connecting tube, and the rotating part stops the fixing part along the circumference of the connecting tube to limit the rotation of the connecting tube relative to the mounting cavity.

[0009] According to the angle limiting mechanism of the embodiment of the present invention, when the connecting tube is in any one of the left limit position and the right limit position, the connecting part abuts the rotating part along the circumference of the connecting tube, and the rotating part abuts the fixed part along the circumference of the connecting tube to limit the rotation of the connecting tube relative to the installation cavity, thereby limiting the rotation angle of the steering wheel. When the connecting tube moves between the left limit position and the right limit position, the rotating part is sleeved outside the connecting tube and can rotate relative to the connecting tube, and the rotating part can also rotate relative to the fixed part to realize the step-by-step transmission of the angle limiting mechanism. Therefore, the transmission structure of the angle limiting mechanism of the embodiment of the present invention is simple, which is conducive to reducing the production cost of the angle limiting mechanism.

[0010] In some embodiments, the rotating component includes a rotating sleeve, and the rotating sleeve has an inner limit portion and an outer limit portion. When between the left extreme position and the right extreme position, the connecting portion is rotatable relative to the inner limit portion along the circumference of the connecting tube, and the outer limit portion is rotatable relative to the fixed portion along the circumference of the rotating sleeve. In either the left extreme position or the right extreme position, the connecting portion stops against the inner limit portion along the circumference of the connecting tube, and the outer limit portion stops against the fixed portion along the circumference of the rotating sleeve.

[0011] In some embodiments, there are multiple rotating sleeves, and the multiple rotating sleeves are arranged in sequence along the axial direction of the connecting tube. Between the left extreme position and the right extreme position, for two adjacent rotating sleeves, the outer limit portion of one rotating sleeve is rotatable relative to the inner limit portion of the other rotating sleeve. In any one of the left extreme position and the right extreme position, the outer limit portion of one rotating sleeve stops against the inner limit portion of the other rotating sleeve.

[0012] In some embodiments, the rotating component includes a first rotating sleeve and a second rotating sleeve, the connecting portion and the inner limit portion of the first rotating sleeve are arranged along the circumference of the connecting tube, the second rotating sleeve is arranged on the first rotating sleeve, the outer limit portion of the first rotating sleeve and the inner limit portion of the second rotating sleeve are arranged along the circumference of the connecting tube, the fixing piece is arranged on the second rotating sleeve, and the outer limit portion of the second rotating sleeve and the fixing portion are arranged along the circumference of the connecting tube.

[0013] In some embodiments, the rotating component includes a first rotating sleeve, a second rotating sleeve and a third rotating sleeve, the connecting portion and the inner limit portion of the first rotating sleeve are arranged along the circumference of the connecting tube, the second rotating sleeve is arranged on the first rotating sleeve, the outer limit portion of the first rotating sleeve and the inner limit portion of the second rotating sleeve are arranged along the circumference of the connecting tube, the third rotating sleeve is arranged on the second rotating sleeve, the outer limit portion of the second rotating sleeve and the inner limit portion of the third rotating sleeve are arranged along the circumference of the connecting tube, the fixing piece is arranged on the third rotating sleeve, and the outer limit portion of the third rotating sleeve and the fixing portion are arranged along the circumference of the connecting tube.

[0014] In some embodiments, the inner limiting portion and the outer limiting portion of the same rotating sleeve are arranged along the axial direction of the rotating sleeve.

[0015] In some embodiments, the rotating sleeve has a first section and a second section that are coaxially connected, a step hole is provided in the first section, the inner limit portion is provided on the inner wall of the step hole, and the outer limit portion is provided on the outer wall of the second section, and the outer wall surface of the outer limit portion is flush with the outer wall surface of the first section.

[0016] In some embodiments, the step hole has a supporting step surface at one end adjacent to the second section, the connecting tube has an annular flange, the connecting portion is arranged on the outer wall of the annular flange, the annular flange is installed in the step hole and abuts against the corresponding supporting step surface, and for two adjacent rotating sleeves, the second section of one rotating sleeve is installed in the step hole of the other rotating sleeve and abuts against the corresponding supporting step surface.

[0017] In some embodiments, the limiting assembly further includes a buffer member, and mounting surfaces are provided on the end surface of the annular flange facing the fixing member and on the end surface of the second section facing the fixing member, and the buffer member is arranged between the mounting surface and the corresponding supporting step surface.

[0018] In some embodiments, a slot is provided on one of the mounting surface and the buffer component, and a protrusion is provided on the other, and the protrusion fits in the slot.

[0019] In some embodiments, the connecting portion and the outer limiting portion are both provided with two stop surfaces arranged opposite to each other along the circumference of the connecting tube, and part of the buffer parts are provided on the stop surfaces; and / or part of the buffer parts are provided on the outer wall surface of the connecting portion and the outer wall surface of the outer limiting portion.

[0020] A steering system according to another embodiment of the present invention comprises: a reduction mechanism, wherein the reduction mechanism has an output shaft and an input shaft; an angle limiting mechanism, wherein the angle limiting mechanism is the angle limiting mechanism described in any one of the embodiments of the present invention, wherein the input shaft is connected to the connecting cylinder; and a steering mechanism, wherein the steering mechanism comprises a steering wheel and a steering shaft, wherein one end of the steering shaft is connected to the steering wheel, and the other end of the steering shaft is connected to the output shaft.

[0021] According to the steering system of the embodiment of the present invention, when the connecting cylinder is in any one of the left limit position and the right limit position, the connecting part abuts the rotating component along the circumference of the connecting cylinder, and the rotating component abuts the fixed part along the circumference of the connecting cylinder to limit the rotation of the connecting cylinder relative to the installation cavity, thereby limiting the rotation angle of the steering wheel. When the connecting cylinder moves between the left limit position and the right limit position, the rotating component is sleeved outside the connecting cylinder and can rotate relative to the connecting cylinder, and the rotating component can also rotate relative to the fixed part to realize the step-by-step transmission of the angle limiting mechanism. Therefore, the transmission structure of the angle limiting mechanism of the steering system of the embodiment of the present invention is simple, which is conducive to reducing the production cost of the angle limiting mechanism.

[0022] A vehicle according to another embodiment of the present invention includes a steering system according to an embodiment of the present invention.

[0023] According to the vehicle of the embodiment of the present invention, when the connecting cylinder is in any one of the left extreme position and the right extreme position, the connecting part abuts the rotating part along the circumference of the connecting cylinder, and the rotating part abuts the fixed part along the circumference of the connecting cylinder to limit the rotation of the connecting cylinder relative to the installation cavity, thereby limiting the rotation angle of the steering wheel. When the connecting cylinder moves between the left extreme position and the right extreme position, the rotating part is sleeved outside the connecting cylinder and can rotate relative to the connecting cylinder, and the rotating part can also rotate relative to the fixed part to realize the step-by-step transmission of the angle limiting mechanism. Therefore, the transmission structure of the angle limiting mechanism of the vehicle of the embodiment of the present invention is simple, which is conducive to reducing the production cost of the angle limiting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of a steering system according to an embodiment of the present invention.

[0025] Figure 2 The corner limiting mechanism and the speed reducing mechanism of the embodiment of the present invention are Figure 1 Partial cross-section view along the FF cutting line.

[0026] Figure 3 It is an exploded view of the corner limiting mechanism and the speed reducing mechanism according to an embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the corner limiting mechanism (excluding the housing) of an embodiment of the present invention.

[0028] Figure 5 Schematic diagram of the connecting tube of the angle limiting mechanism of the embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the installation of the connecting tube and the buffer member of the corner limiting mechanism of the embodiment of the present invention.

[0030] Figure 7 It is a schematic diagram of a rotating sleeve of the angle limiting mechanism according to an embodiment of the present invention.

[0031] Figure 8 It is a schematic diagram of the installation of the rotating sleeve and the buffer member of the corner limiting mechanism according to an embodiment of the present invention.

[0032] Fig. 9 Schematic diagram of a buffer member of a corner limiting mechanism according to an embodiment of the present invention.

[0033] Fig.10 Schematic diagram of a fixing member of the corner limiting mechanism according to an embodiment of the present invention.

[0034] Fig.11 Schematic diagram of the housing of the corner limiting mechanism according to an embodiment of the present invention.

[0035] Fig.12 Schematic diagram of a bearing of an angle limiting mechanism according to an embodiment of the present invention.

[0036] Fig.13 It is an exploded view of the corner limiting mechanism (excluding the housing) of the embodiment of the present invention when it is between the left limit position and the right limit position.

[0037] Fig.14 It is an exploded view of the corner limiting mechanism (without the housing) of an embodiment of the present invention at the right limit position.

[0038] Fig.15 It is an exploded view of the corner limiting mechanism (without the housing) of an embodiment of the present invention at the left extreme position.

[0039] Reference numerals:

[0040] 100. Corner limit mechanism;

[0041] 101, housing; 1011, installation cavity;

[0042] 102, connecting tube; 1021, connecting part; 10211, stopping surface; 1022, annular flange; 10221, mounting surface; 10222, slot; 11222, positioning slot; 12222, alignment slot; 10223, annular groove; 10224, mounting hole;

[0043] 103, limit assembly; 1031, fixing member; 10311, fixing part; 1032, rotating member; 10321, rotating sleeve;

[0044] 11321, first rotating sleeve; 12321, second rotating sleeve; 13321, third rotating sleeve; 103211, inner limiting part;

[0045] 103212, outer limit part; 103213, first section; 103214, second section; 103215, step hole; 103216, support step surface; 1033, buffer; 10331, clamping convex; 11331, positioning clamping convex; 12331, alignment clamping convex; 10332, buffer part; 1034, bearing; 1035, bolt;

[0046] 200, reduction mechanism; 201, reduction housing; 202, input shaft;

[0047] 300. Steering mechanism; 301. Steering shaft. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0049] Please refer to the following Figures 1 to 15 The turning angle limiting mechanism 100, the steering system and the vehicle according to the embodiment of the present invention are described.

[0050] The rotation angle limiting mechanism 100 of the embodiment of the present invention comprises: a housing 101, a connecting tube 102 and a limiting assembly 103. A mounting cavity 1011 is provided in the housing 101, the connecting tube 102 is provided in the mounting cavity 1011 and is rotatable relative to the mounting cavity 1011, a connecting portion 1021 is provided on the outer wall of the connecting tube 102, and the limiting assembly 103 comprises a fixing member 1031 and a rotating member 1032, the fixing member 1031 is fixedly installed in the mounting cavity 1011, the fixing member 1031 has a fixing portion 10311, and the rotating member 1032 is rotatably sleeved on the outside of the connecting tube 102, and the connecting tube 102 has a left limit position and a right limit position.

[0051] When between the left extreme position and the right extreme position, the connecting tube 102 can drive the rotating component 1032 to rotate relative to the installation cavity 1011. When at either the left extreme position or the right extreme position, the connecting portion 1021 stops the rotating component 1032 along the circumference of the connecting tube 102, and the rotating component 1032 stops the fixed portion 10311 along the circumference of the connecting tube 102 to limit the rotation of the connecting tube 102 relative to the installation cavity 1011.

[0052] It can be understood that the left limit position may correspond to the limit position of the steering wheel rotating counterclockwise, and the right limit position may correspond to the limit position of the steering wheel rotating clockwise, thereby limiting the rotation angle of the steering wheel.

[0053] According to the corner limiting mechanism 100 of the embodiment of the present invention, when the connecting cylinder 102 is in any one of the left limit position and the right limit position, the connecting portion 1021 abuts against the rotating component 1032 along the circumference of the connecting cylinder 102, and the rotating component 1032 abuts against the fixed portion 10311 along the circumference of the connecting cylinder 102 to limit the rotation of the connecting cylinder 102 relative to the installation cavity 1011, thereby limiting the rotation angle of the steering wheel. When the connecting cylinder 102 moves between the left limit position and the right limit position, the rotating component 1032 is sleeved outside the connecting cylinder 102 and can rotate relative to the connecting cylinder 102, and the rotating component 1032 can also rotate relative to the fixed component 1031 to realize the step-by-step transmission of the corner limiting mechanism 100, thereby the transmission structure of the corner limiting mechanism 100 of the embodiment of the present invention is simple, which is conducive to reducing the production cost of the corner limiting mechanism 100.

[0054] It should be noted that if Figures 2 to 6 As shown, a mounting hole 10224 is provided in the connecting tube 102, and the input shaft 202 of the reduction mechanism 200 is fixedly inserted into the mounting hole 10224. In other words, the input shaft 202 is inserted into the mounting hole 10224, but the input shaft 202 cannot rotate relative to the mounting hole 10224, that is, when the input shaft 202 rotates, it can drive the connecting tube 102 to rotate synchronously.

[0055] The input shaft 202 of the speed reduction mechanism 200 drives the connecting cylinder 102 to rotate, and the connecting cylinder 102 drives the rotating component 1032 to rotate, so that the input shaft 202 can rotate within a certain range until the connecting portion 1021 stops against the rotating component 1032, and the rotating component 1032 stops against the fixing portion 10311. For example, the input shaft 202 and the mounting hole 10224 are matched with a spline structure, which can facilitate the installation and removal of the connecting cylinder 102 and the input shaft 202.

[0056] In one example, if Figure 2 and Figure 3 As shown, the speed reduction mechanism 200 includes a speed reduction housing 201, and the housing 101 is fixedly connected to the speed reduction housing 201, for example, the housing 101 and the speed reduction housing 201 can be connected by bolts 1035. Therefore, when the input shaft 202 drives the connecting cylinder 102 to rotate, the housing 101 can remain fixed. The axis of the installation cavity 1011, the axis of the connecting cylinder 102, and the axis of the rotating component 1032 are located on the same straight line, thereby ensuring the stability of the connecting cylinder 102 and the rotating component 1032 when rotating.

[0057] Alternatively, if Figures 2 to 8 As shown, the rotating component 1032 includes a rotating sleeve 10321, and the rotating sleeve 10321 can be one or more. It can be understood that the angle limiting mechanism 100 of the embodiment of the present invention can change the range of the rotation angle of the connecting tube 102 by changing the number of rotating sleeves 10321 (or the circumferential length of 1021).

[0058] In one example, the rotating sleeve 10321 can be one. The rotating sleeve 10321 has an inner limit portion 103211 and an outer limit portion 103212. When between the left limit position and the right limit position, the connecting portion 1021 can rotate relative to the inner limit portion 103211 along the circumference of the connecting tube 102, and the outer limit portion 103212 can rotate relative to the fixed portion 10311 along the circumference of the rotating sleeve 10321. When in either the left limit position or the right limit position, the connecting portion 1021 stops against the inner limit portion 103211 along the circumference of the connecting tube 102, and the outer limit portion 103212 stops against the fixed portion 10311 along the circumference of the rotating sleeve 10321. It can be understood that when the connecting tube 102 is between the left limit position and the right limit position, the connecting portion 1021 and the inner limit portion 103211 are spaced apart along the circumference of the connecting tube 102, so that the connecting tube 102 can rotate circumferentially relative to the rotating sleeve 10321, and the outer limit portion 103212 and the fixing portion 10311 are spaced apart along the circumference of the connecting tube 102, so that the rotating sleeve 10321 can rotate circumferentially relative to the fixing member 1031. The rotating sleeve 10321 is sleeved on the connecting tube 102 and can rotate relative to the connecting tube 102, thereby facilitating the assembly of the rotation angle limiting mechanism 100, and has a simple structure and low manufacturing cost.

[0059] Specifically, Figure 6 and Figure 7 As shown, the connecting portion 1021 has an A1 surface and an A2 surface arranged relatively along the circumference of the connecting tube 102, and the inner limit portion 103211 has a C1 surface and a C2 surface arranged relatively along the circumference of the connecting tube 102. When in the right limit position, the A1 surface of the connecting portion 1021 stops against the C2 surface of the inner limit portion 103211, and when in the left limit position, the A2 surface of the connecting portion 1021 stops against the C1 surface of the inner limit portion 103211. Similarly, the outer limit portion 103212 has an A1 surface and an A2 surface arranged relatively along the circumference of the connecting tube 102, and the fixing portion 10311 has a C1 surface and a C2 surface arranged relatively along the circumference of the connecting tube 102. When in the right limit position, the A1 surface of the outer limit portion 103212 stops against the C2 surface of the fixed portion 10311 , and when in the left limit position, the A2 surface of the outer limit portion 103212 stops against the C1 surface of the fixed portion 10311 .

[0060] Alternatively, if Figure 7 and Figure 8As shown, for the same rotating sleeve 10321, the inner limit portion 103211 and the outer limit portion 103212 of the rotating sleeve 10321 are arranged along the axial direction of the rotating sleeve 10321. In this way, the radial dimension of the angle limiting mechanism 100 can be reduced. For example, the inner limit portion 103211 and the outer limit portion 103212 both extend along the axial direction of the rotating sleeve 10321, and the C1 surface of the inner limit portion 103211 is coplanar with the A1 surface of the outer limit portion 103212, and the C2 surface of the inner limit portion 103211 is coplanar with the A2 surface of the outer limit portion 103212, thereby facilitating the processing and manufacturing of the rotating sleeve 10321, and when there are multiple rotating sleeves 10321, multiple rotating sleeves 10321 can be easily replaced and installed, and the versatility is good.

[0061] In other embodiments, Figures 2 to 8 As shown, there are multiple rotating sleeves 10321, and the multiple rotating sleeves 10321 are arranged in sequence along the axial direction of the connecting tube 102. When between the left limit position and the right limit position, for two adjacent rotating sleeves 10321, the outer limit 103212 part of one rotating sleeve 10321 can rotate relative to the inner limit 103211 of the other rotating sleeve 10321. When in any one of the left limit position and the right limit position, the outer limit 103212 part of one rotating sleeve 10321 stops against the inner limit 103211 of the other rotating sleeve 10321. It can be understood that when the connecting tube 102 rotates between the left limit position and the right limit position, the connecting tube 102 drives the rotating sleeve 10321 at the head end to rotate, and the adjacent rotating sleeves 10321 are driven step by step in sequence, and finally drive the rotating sleeve 10321 at the tail end to rotate relative to the fixed part 10311. Therefore, the rotation angle limiting mechanism 100 of the embodiment of the present invention can change the range of the rotation angle of the connecting tube 102 by changing the number of rotating sleeves 10321 or the circumferential dimensions of the inner limiting portion 103211 and the outer limiting portion 103212 .

[0062] For another example, there are two rotating sleeves 10321, that is, the rotating component 1032 includes a first rotating sleeve 11321 and a second rotating sleeve 12321, the connecting portion 1021 and the inner limit portion 103211 of the first rotating sleeve 11321 are arranged along the circumference of the connecting tube 102, the second rotating sleeve 12321 is sleeved on the first rotating sleeve 11321, the outer limit portion 103212 of the first rotating sleeve 11321 and the inner limit portion 103211 of the second rotating sleeve 12321 are arranged along the circumference of the connecting tube 102, the fixing member 1031 is sleeved on the second rotating sleeve 12321, and the outer limit portion 103212 of the second rotating sleeve 12321 and the fixing portion 10311 are arranged along the circumference of the connecting tube 102. It can be understood that the first rotating sleeve 11321 and the second rotating sleeve 12321 have the same structure and can be replaced and reused, thereby reducing the production cost of the angle limiting mechanism 100, and the structure is simple and easy to disassemble and assemble.

[0063] It can be understood that, for two adjacent rotating sleeves 10321, when in the right extreme position, the A1 surface of the outer limit portion 103212 of one rotating sleeve 10321 (the first rotating sleeve 11321) stops at the C2 surface of the inner limit portion 103211 of the other rotating sleeve 10321 (the second rotating sleeve 12321), and when in the left extreme position, the A2 surface of the outer limit portion 103212 of one rotating sleeve 10321 (the first rotating sleeve 11321) stops at the C1 surface of the inner limit portion 103211 of the other rotating sleeve 10321 (the second rotating sleeve 12321), thereby limiting the rotation range of the two adjacent rotating sleeves 10321.

[0064] For example, Figures 2 to 8As shown, there are three rotating sleeves 10321, that is, the rotating component 1032 includes a first rotating sleeve 11321, a second rotating sleeve 12321 and a third rotating sleeve 13321, the connecting portion 1021 and the inner limiting portion 103211 of the first rotating sleeve 11321 are arranged along the circumferential direction of the connecting cylinder 102, the second rotating sleeve 12321 is sleeved on the first rotating sleeve 11321, and the outer limiting portion 103212 of the first rotating sleeve 11321 and the inner limiting portion 103211 of the second rotating sleeve 12321 are connected to each other. 03211 is arranged along the circumference of the connecting tube 102, the third rotating sleeve 13321 is sleeved on the second rotating sleeve 12321, the outer limit 103212 part of the second rotating sleeve 12321 and the inner limit 103211 of the third rotating sleeve 13321 are arranged along the circumference of the connecting tube 102, the fixing member 1031 is sleeved on the third rotating sleeve 13321, and the outer limit 103212 part and the fixing part 10311 of the third rotating sleeve 13321 are arranged along the circumference of the connecting tube 102. It can be understood that the first rotating sleeve 11321, the second rotating sleeve 12321 and the third rotating sleeve 13321 have the same structure and can be replaced and installed (reused) with each other, thereby reducing the production cost of the rotation angle limiting mechanism 100, and the structure is simple and easy to disassemble and assemble.

[0065] like Figures 13 to 15 As shown, the following describes a solution of the angle limiting mechanism 100 with three rotating sleeves 10321.

[0066] When the connecting tube 102 is between the left extreme position and the right extreme position, the connecting portion 1021 of the connecting tube 102 and the inner limit portion 103211 of the first rotating sleeve 11321 are spaced apart along the circumference of the connecting tube 102, the outer limit portion 103212 of the first rotating sleeve 11321 and the inner limit portion 103211 of the second rotating sleeve 12321 are spaced apart along the circumference of the connecting tube 102, the outer limit portion 103212 of the second rotating sleeve 12321 and the inner limit portion 103211 of the third rotating sleeve 13321 are spaced apart along the circumference of the connecting tube 102, and the outer limit portion 103212 of the third rotating sleeve 13321 and the fixing portion 10311 are spaced apart along the circumference of the connecting tube 102.

[0067] When the connecting cylinder 102 is in the right extreme position (i.e., when the steering wheel rotates clockwise to the extreme position), the A1 surface of the connecting portion 1021 stops against the C2 surface of the inner limit portion 103211 of the first rotating sleeve 11321, the A1 surface of the outer limit portion 103212 of the first rotating sleeve 11321 stops against the C2 surface of the inner limit portion 103211 of the second rotating sleeve 12321, the A1 surface of the outer limit portion 103212 of the first rotating sleeve 11321 stops against the C2 surface of the inner limit portion 103211 of the second rotating sleeve 12321, and the A1 surface of the outer limit portion 103212 of the third rotating sleeve 13321 stops against the C2 surface of the fixing portion 10311 of the fixing member 1031. At this time, the connecting cylinder 102 and each rotating sleeve 10321 stop rotating, i.e., the connecting cylinder 102 is in the right extreme position.

[0068] When the connecting cylinder 102 is in the left extreme position (i.e., when the steering wheel rotates counterclockwise to the extreme position), the A2 surface of the connecting portion 1021 stops against the C1 surface of the inner limit portion 103211 of the first rotating sleeve 11321, the A2 surface of the outer limit portion 103212 of the first rotating sleeve 11321 stops against the C1 surface of the inner limit portion 103211 of the second rotating sleeve 12321, the A2 surface of the outer limit portion 103212 of the first rotating sleeve 11321 stops against the C1 surface of the inner limit portion 103211 of the second rotating sleeve 12321, and the A2 surface of the outer limit portion 103212 of the third rotating sleeve 13321 stops against the C1 surface of the fixed portion 10311 of the fixing member 1031. At this time, the connecting cylinder 102 and each rotating sleeve 10321 stop rotating, i.e., the connecting cylinder 102 is in the left extreme position.

[0069] In some embodiments, Figure 7 and Figure 8 As shown, the rotating sleeve 10321 has a first section 103213 and a second section 103214 which are coaxially connected, a step hole 103215 is provided in the first section 103213, an inner limit portion 103211 is provided on the inner wall of the step hole 103215, an outer limit portion 103212 is provided on the outer wall of the second section 103214, and the outer wall surface of the outer limit portion 103212 is flush with the outer wall surface of the first section 103213. Therefore, when a plurality of rotating sleeves 10321 are nested together, the rotating component 1032 can be substantially cylindrical, thereby reducing the radial dimension of the rotating component 1032, making the structure of the angle limiting mechanism 100 more compact and occupying less space.

[0070] Alternatively, if Figure 6 and Figure 7As shown, one end of the step hole 103215 adjacent to the second section 103214 has a supporting step surface 103216, the connecting tube 102 has an annular flange 1022, the connecting portion 1021 is arranged on the outer wall of the annular flange 1022, the annular flange 1022 is installed in the step hole 103215 and abuts against the corresponding supporting step surface 103216, and for two adjacent rotating sleeves 10321, the second section 103214 of one rotating sleeve 10321 is installed in the step hole 103215 of the other rotating sleeve 10321 and abuts against the corresponding supporting step surface 103216.

[0071] Taking the angle limiting mechanism 100 of three rotating sleeves 10321 as an example, the first section 103213 of the first rotating sleeve 11321 is sleeved on the annular flange 1022, and the axial end face of the annular flange 1022 abuts against the supporting step face 103216 of the first rotating sleeve 11321, and the first section 103213 of the second rotating sleeve 12321 is sleeved on the second section 103214 of the first rotating sleeve 11321, and the second section 103214 of the first rotating sleeve 11321 abuts against the supporting step face 103216 of the second rotating sleeve 12321. The first section 103213 of the third rotating sleeve 13321 is sleeved on the second section 103214 of the second rotating sleeve 12321, and the second section 103214 of the second rotating sleeve 12321 is abutted against the supporting step surface 103216 on the third rotating sleeve 13321. The fixing member 1031 is sleeved on the second section 103214 of the third rotating sleeve 13321, and the second section 103214 of the third rotating sleeve 13321 is abutted against the end surface of the fixing member 1031 or the housing 101. In this way, the first rotating sleeve 11321, the second rotating sleeve 12321 and the third rotating sleeve 13321 can be axially limited to prevent the first rotating sleeve 11321, the second rotating sleeve 12321 and the third rotating sleeve 13321 from shaking along the axial direction of the connecting cylinder 102.

[0072] In some embodiments, Figure 2 , Figure 6 and Figure 8As shown, the limiting assembly 103 further includes a buffer 1033, and the annular flange 1022 and the second section 103214 are provided with a mounting surface 10221 along the end surface facing the fixing member 1031, and the buffer 1033 is arranged between the mounting surface 10221 and the corresponding support step surface 103216. It can be understood that there are multiple buffers 1033, some of which are arranged between the annular flange 1022 and the corresponding support step surface 103216, and the other part of the buffer 1033 is arranged between the second section 103214 and the corresponding support step surface 103216. In this way, the impact force of the components in the corner limiting mechanism 100 when rotating can be reduced, the noise generated when the components in the corner limiting mechanism 100 rotate can be reduced, the wear of the components can be reduced, and the service life of the corner limiting mechanism 100 can be extended.

[0073] like Figure 5 As shown, the buffer 1033 can be mounted on the mounting surface 10221 by a snap-fitting method, or can be formed on the mounting surface 10221 by an integral plastic coating method. The present application does not specifically limit the molding method of the buffer 1033. It should be noted that the buffer 1033 is a soft material and can be squeezed and deformed under the action of an external force. For example, the buffer 1033 can be plastic or rubber.

[0074] Alternatively, if Figures 6 to 9 As shown, the connecting portion 1021 and the outer limit portion 103212 are provided with two relatively arranged stop surfaces 10211 (i.e., the A1 surface and the A2 surface) along the circumference of the connecting tube 102, and part of the buffer member 1033 is provided on the stop surface 10211, and part of the buffer member 1033 is provided on the outer wall surface of the connecting portion 1021 and the outer wall surface of the outer limit portion 103212.

[0075] Taking the buffer member 1033 disposed on the annular flange 1022 as an example, the buffer member 1033 is provided with a buffer portion 10332, and the buffer portion 10332 is arranged on opposite sides of the connecting portion 1021 along the circumferential direction of the connecting tube 102. When the A1 surface of the connecting portion 1021 is about to stop against the C2 surface of the inner limit portion 103211 of the first rotating sleeve 11321, the B1 surface of the buffer portion 10332 will first contact the C2 surface of the inner limit portion 103211 of the first rotating sleeve 11321. When the A2 surface of the connecting portion 1021 is about to stop against the C1 surface of the inner limit portion 103211 of the first rotating sleeve 11321, the B2 surface of the buffer portion 10332 will first contact the C1 surface of the inner limit portion 103211 of the first rotating sleeve 11321, thereby reducing the noise generated when the connecting portion 1021 collides with the inner limit portion 103211 of the first rotating sleeve 11321. Similarly, the buffer member 1033 between two adjacent rotating sleeves 10321 can reduce the noise generated when the inner limit portion 103211 and the outer limit portion 103212 collide when the two adjacent rotating sleeves 10321 rotate.

[0076] In one example, if Figures 5 to 9 As shown, one of the mounting surface 10221 and the buffer 1033 is provided with a slot 10222, and the other is provided with a protrusion 10331, and the protrusion 10331 is matched in the slot 10222. For example, the protrusion 10331 is provided on the buffer 1033, and the slot 10222 is provided on the mounting surface 10221. There can be a plurality of protrusions 10331, and the plurality of protrusions 10331 are arranged at intervals along the circumference of the buffer 1033, and there are a plurality of slots 10222, and the plurality of slots 10222 corresponds to the plurality of protrusions 10331 one by one.

[0077] Specifically, Figure 6 and Fig. 9As shown, the cam 10331 includes a positioning cam 11331 and an alignment cam 12331, and the positioning cam 11331 and the alignment cam 12331 are arranged at intervals along the circumference of the buffer 1033. The slot 10222 includes a positioning slot 11222 and an alignment slot 12222, and the positioning slot 11222 corresponds to the positioning cam 11331, and the alignment slot 12222 corresponds to the alignment slot 12222. Taking the connecting tube 102 as an example, the slot 10222 includes a positioning slot 11222 and a plurality of alignment slots 12222, and the cam 10331 includes a positioning cam 11331 and a plurality of alignment cams 12331. The positioning slot 11222 is provided at the position of the connecting portion 1021, and the radial depth of the positioning slot 11222 is greater than the radial depth of the alignment slot 12222. Accordingly, the positioning protrusion 11331 is provided between the two buffer portions 10332, and the radial dimension of the positioning protrusion 11331 is greater than the radial dimension of the alignment protrusion 12331. Thus, the assembly of the buffer 1033 can be foolproofed to reduce the probability of the operator assembling the buffer 1033 incorrectly. On the other hand, the corner limiting mechanism of the embodiment of the present invention is conducive to improving the reliability of the installation of the buffer 1033 and the accuracy of the positioning by adopting the above-mentioned design of the protrusion 10331 and the slot 10222.

[0078] In some embodiments, Figure 2 , Figure 5 and Figure 6 As shown, the outer wall of the connecting cylinder 102 adjacent to the fixing member 1031 is provided with an annular groove 10223, and the angle limiting mechanism 100 further includes a bearing 1034, the inner ring of the bearing 1034 is clamped on the annular groove 10223, the fixing member 1031 is a sleeve structure, and the outer ring of the bearing 1034 is clamped on the inner wall of the fixing member 1031, thereby supporting the connecting cylinder 102 to rotate relative to the housing 101. The outer wall of the fixing member 1031 and the inner wall of the installation cavity 1011 can be connected in a spline structure or in an interference fit manner, thereby limiting the rotation of the fixing member 1031 relative to the installation cavity 1011.

[0079] like Figure 1 As shown, a steering system of another embodiment of the present invention comprises: a speed reduction mechanism 200, a turning angle limiting mechanism 100 and a steering mechanism 300, the speed reduction mechanism 200 has an output shaft (not shown) and an input shaft 202, the turning angle limiting mechanism 100 is the turning angle limiting mechanism 100 of the present invention, the input shaft 202 is connected to the connecting cylinder 102 through a spline structure, the steering mechanism 300 comprises a steering wheel (not shown) and a steering shaft 301, one end of the steering shaft 301 is fixedly connected to the steering wheel, and the other end of the steering shaft 301 is fixedly connected to the output shaft.

[0080] According to the steering system of the embodiment of the present invention, when the connecting cylinder 102 is in any one of the left limit position and the right limit position, the connecting portion 1021 abuts against the rotating component 1032 along the circumference of the connecting cylinder 102, and the rotating component 1032 abuts against the fixed portion 10311 along the circumference of the connecting cylinder 102 to limit the rotation of the connecting cylinder 102 relative to the installation cavity 1011, thereby limiting the rotation angle of the steering wheel. When the connecting cylinder 102 moves between the left limit position and the right limit position, the rotating component 1032 is sleeved outside the connecting cylinder 102 and can rotate relative to the connecting cylinder 102, and the rotating component 1032 can also rotate relative to the fixed component 1031 to realize the step-by-step transmission of the angle limiting mechanism 100, thereby the transmission structure of the angle limiting mechanism 100 of the steering system of the embodiment of the present invention is simple, which is conducive to reducing the production cost of the angle limiting mechanism 100.

[0081] A vehicle according to another embodiment of the present invention comprises the steering system according to the present invention. The technical advantages of the vehicle according to the embodiment of the present invention are the same as the technical advantages of the steering system according to the above embodiment, which will not be described in detail here.

[0082] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0083] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0086] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A corner limiting mechanism, It is characterized in that include: A housing, wherein a mounting cavity is provided in the housing; A connecting tube, the connecting tube is arranged in the installation cavity and is rotatable relative to the installation cavity, and a connecting portion is arranged on an outer wall of the connecting tube; The limiting assembly comprises a fixing member and a rotating member, wherein the fixing member is fixedly installed in the installation cavity, the fixing member has a fixing portion, and the rotating member is rotatably sleeved outside the connecting tube, and the connecting tube has a left limit position and a right limit position. When between the left extreme position and the right extreme position, the connecting tube can drive the rotating component to rotate relative to the mounting cavity. When in either the left extreme position or the right extreme position, the connecting portion stops against the rotating component along the circumference of the connecting tube, and the rotating component stops against the fixed portion along the circumference of the connecting tube to limit the rotation of the connecting tube relative to the mounting cavity.

2. The corner limiting mechanism according to claim 1, It is characterized in that The rotating component includes a rotating sleeve, and the rotating sleeve has an inner limit portion and an outer limit portion. When between the left limit position and the right limit position, the connecting portion is rotatable relative to the inner limit portion along the circumference of the connecting tube, and the outer limit portion is rotatable relative to the fixed portion along the circumference of the rotating sleeve. When in either the left limit position or the right limit position, the connecting portion stops against the inner limit portion along the circumference of the connecting tube, and the outer limit portion stops against the fixed portion along the circumference of the rotating sleeve.

3. The corner limiting mechanism according to claim 2, It is characterized in that There are multiple rotating sleeves, and the multiple rotating sleeves are arranged in sequence along the axial direction of the connecting tube. Between the left extreme position and the right extreme position, for two adjacent rotating sleeves, the outer limiting portion of one rotating sleeve is rotatable relative to the inner limiting portion of the other rotating sleeve. At any one of the left extreme position and the right extreme position, the outer limiting portion of one rotating sleeve stops against the inner limiting portion of the other rotating sleeve.

4. The corner limiting mechanism according to claim 3, It is characterized in that The rotating component includes a first rotating sleeve and a second rotating sleeve, the connecting portion and the inner limiting portion of the first rotating sleeve are arranged along the circumferential direction of the connecting tube, the second rotating sleeve is arranged on the first rotating sleeve, the outer limiting portion of the first rotating sleeve and the inner limiting portion of the second rotating sleeve are arranged along the circumferential direction of the connecting tube, the fixing piece is arranged on the second rotating sleeve, and the outer limiting portion of the second rotating sleeve and the fixing portion are arranged along the circumferential direction of the connecting tube.

5. The corner limiting mechanism according to claim 3, It is characterized in that The rotating component includes a first rotating sleeve, a second rotating sleeve and a third rotating sleeve, the connecting portion and the inner limiting portion of the first rotating sleeve are arranged along the circumferential direction of the connecting tube, the second rotating sleeve is arranged on the first rotating sleeve, the outer limiting portion of the first rotating sleeve and the inner limiting portion of the second rotating sleeve are arranged along the circumferential direction of the connecting tube, the third rotating sleeve is arranged on the second rotating sleeve, the outer limiting portion of the second rotating sleeve and the inner limiting portion of the third rotating sleeve are arranged along the circumferential direction of the connecting tube, the fixing piece is arranged on the third rotating sleeve, and the outer limiting portion of the third rotating sleeve and the fixing portion are arranged along the circumferential direction of the connecting tube.

6. The corner limiting mechanism according to claim 3, It is characterized in that The inner limiting portion and the outer limiting portion of the same rotating sleeve are arranged along the axial direction of the rotating sleeve.

7. The corner limiting mechanism according to claim 3, It is characterized in that The rotating sleeve comprises a first section and a second section which are coaxially connected, wherein a step hole is arranged in the first section, the inner limit portion is arranged on the inner wall of the step hole, the outer limit portion is arranged on the outer wall of the second section, and the outer wall surface of the outer limit portion is flush with the outer wall surface of the first section.

8. The corner limiting mechanism according to claim 7, It is characterized in that One end of the step hole adjacent to the second section has a supporting step surface, the connecting tube has an annular flange, the connecting portion is arranged on the outer wall of the annular flange, the annular flange is installed in the step hole and abuts against the corresponding supporting step surface, and for two adjacent rotating sleeves, the second section of one rotating sleeve is installed in the step hole of the other rotating sleeve and abuts against the corresponding supporting step surface.

9. The corner limiting mechanism according to claim 8, It is characterized in that The limiting assembly also includes a buffer member, and mounting surfaces are provided on the end surface of the annular flange facing the fixing member and the end surface of the second section facing the fixing member, and the buffer member is arranged between the mounting surface and the corresponding supporting step surface.

10. The corner limiting mechanism according to claim 9, It is characterized in that A clamping groove is provided on one of the installation surface and the buffer component, and a clamping protrusion is provided on the other one, and the clamping protrusion is matched in the clamping groove.

11. The corner limiting mechanism according to claim 9, It is characterized in that The connecting portion and the outer limiting portion are both provided with two stop surfaces arranged opposite to each other along the circumference of the connecting tube, and part of the buffer member is provided on the stop surfaces; And / or, part of the buffer member is arranged on the outer wall surface of the connecting portion and the outer wall surface of the outer limiting portion.

12. A steering system, It is characterized in that include: A reduction mechanism, wherein the reduction mechanism has an output shaft and an input shaft; Angle limiting mechanism, wherein the angle limiting mechanism is the angle limiting mechanism according to any one of claims 1 to 11, and the input shaft is connected to the connecting cylinder; The steering mechanism comprises a steering wheel and a steering shaft, one end of the steering shaft is connected to the steering wheel, and the other end of the steering shaft is connected to the output shaft.

13. A vehicle, It is characterized in that Includes the steering system as claimed in claim 12.

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