Telescopic position measuring assembly, steering column and vehicle

Abstract

The invention discloses a telescopic position measuring assembly, a steering column and a vehicle, the telescopic position measuring assembly comprises a first lead screw, a first nut and a rotation angle measuring device, and the first nut is in threaded fit with the first lead screw; at least one part of the rotation angle measuring device is connected with the first lead screw so as to detect the number of rotation turns of the first lead screw. According to the telescopic position measurement assembly, measurement errors caused by mechanical transmission tolerance and disturbance of a driving part can be reduced, so that the measurement precision of the telescopic position measurement assembly is improved, and the risk that a lead screw nut mechanism is damaged due to impact on a mechanical stop point is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steering columns, and in particular to a telescopic position measuring component, a steering column and a vehicle. Background Art

[0002] The electrically adjustable steering column eliminates the locking and releasing mechanism (handle mechanism) of the traditional mechanical column, and drives the telescopic adjustment of the steering column through the telescopic adjustment component to achieve the height adjustment of the steering wheel. Among them, the telescopic adjustment component includes a drive motor, a reducer and a screw nut structure. The output torque of the drive motor is decelerated and increased by the reducer and then output to the screw nut mechanism. The screw nut mechanism is used to drive the steering column to telescope and complete the telescopic adjustment of the steering column.

[0003] In order to obtain the position of the steering wheel, it is necessary to measure the telescopic position of the steering column. The telescopic stroke of the steering column is usually large. For example, in the application scenario of autonomous driving, the steering wheel needs to be quickly retracted into the front cabin, which requires the steering column to have a large telescopic stroke, and the measurement range of the displacement sensor is limited. Therefore, the displacement sensor cannot be used to directly measure the telescopic position of the steering column. In the related art, a Hall sensor is set on the rotor of the drive motor, and the number of rotations of the drive motor is measured by the Hall sensor. The number of rotations of the lead screw in the lead screw nut mechanism is obtained through the transmission of the reducer, so as to calculate the moving distance of the nut relative to the lead screw in the lead screw nut mechanism, and then obtain the telescopic position of the steering column. Due to the superposition of mechanical transmission tolerances and disturbances in the drive components, the telescopic position measurement error is large, and the lead screw nut mechanism is easily damaged by impacting the mechanical stop point. 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, the present invention proposes a telescopic position measuring assembly to improve the measuring accuracy of the telescopic position measuring assembly and reduce the risk of damage to the screw nut mechanism due to impact on the mechanical stop point.

[0006] The telescopic position measuring assembly of the present invention comprises a first lead screw, a first nut and an angle measuring device, wherein the first nut is threadedly matched with the first lead screw; at least a portion of the angle measuring device is connected to the first lead screw to detect the number of rotations of the first lead screw.

[0007] Optionally, the telescopic position measuring assembly also includes a connecting frame, and the first screw is rotatably connected to the connecting frame; the angle measuring device includes a rotating part and a fixed part, the rotating part is rotatably connected to the fixed part, the rotating part is connected to the first screw, and the fixed part is connected to the connecting frame.

[0008] Optionally, the first screw includes a first transmission section and a first connecting section arranged in sequence along its axial direction, the first nut is threadedly engaged with the first transmission section, the first connecting section is rotatably connected to the connecting frame, and the rotating portion is connected to the first connecting section.

[0009] Optionally, the rotating part is annular, and the rotating part is sleeved on the first connecting section and has an interference fit with the first connecting section; and / or, the telescopic position measuring assembly also includes a first bearing sleeved on the first connecting section, the inner ring of the first bearing is connected to the first connecting section, and the outer ring of the first bearing is connected to the connecting frame.

[0010] Optionally, the telescopic position measuring assembly also includes a second nut, a second screw and a driving member, the second nut is coaxially arranged and connected to the first screw; the second screw is arranged on the side of the second nut away from the first nut and is threadedly matched with the second nut; the driving member includes an output shaft, and the output shaft is transmission-connected to the first screw or the second nut.

[0011] Optionally, the second nut includes a second transmission section and a second connecting section arranged in sequence along the axial direction of the first screw, the second transmission section is connected to the output shaft in transmission, the telescopic position measuring assembly also includes a second bearing sleeved on the second connecting section, the inner ring of the second bearing is connected to the second connecting section, and the outer ring of the second bearing is connected to the connecting frame; and / or, the telescopic position measuring assembly also includes a transmission gear, the transmission gear is connected to the output shaft, the transmission gear is provided with meshing teeth, and the second nut is provided with external teeth, and the external teeth mesh with the meshing teeth.

[0012] Optionally, the driving member includes a mounting seat, the output shaft is rotatably connected to the mounting seat, and the mounting seat is connected to the connecting frame;

[0013] The mounting seat and the rotation angle measuring device are respectively arranged on opposite sides of the connecting frame in the axial direction of the first lead screw.

[0014] Optionally, the angle measuring device is a steering wheel angle sensor.

[0015] The invention also provides a steering column.

[0016] The steering column of the present invention includes a column body and a telescopic position measuring assembly, wherein the column body includes a first column tube and a second column tube, wherein the second column tube is movably connected to the first column tube along the length direction of the first column tube; the telescopic position measuring assembly is the telescopic position measuring assembly described in any one of the above items, wherein the first nut is connected to the first column tube, and the first screw is connected to the second column tube.

[0017] The present invention also provides a vehicle.

[0018] The vehicle of the present invention comprises the telescopic position measuring assembly described in any one of the above items and / or the steering column described in any one of the above items.

[0019] When the telescopic position measuring assembly is used, the first nut can be connected to the first component, and the first lead screw can be connected to the second component, so that when the first lead screw rotates relative to the first nut, the second component can be driven to move relative to the first component along the axial direction of the first lead screw. The number of rotations of the first lead screw is detected by the angle measuring device, and the moving distance of the first nut relative to the first lead screw can be calculated. The moving distance is the moving distance of the second component relative to the first component, so that the telescopic position of the second component can be obtained. Therefore, compared with the related art of using a Hall sensor to detect the number of rotations of the drive motor and using the number of rotations of the drive motor to calculate the moving distance of the nut relative to the lead screw in the lead screw and nut mechanism, the measurement error caused by the mechanical transmission tolerance and the disturbance of the drive component can be reduced, thereby improving the measurement accuracy of the telescopic position measuring assembly and reducing the risk of damage to the lead screw and nut mechanism due to impact on the mechanical stop point. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an axonometric view of a telescopic position measuring assembly according to an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Schematic diagram of the local structure of the middle connecting frame and the angle measuring device.

[0022] Figure 3 is a cross-sectional view of a telescopic position measuring assembly according to an embodiment of the present invention.

[0023] Figure 4 It is an axonometric view of a steering column according to an embodiment of the present invention.

[0024] Figure 5 yes Figure 4 Schematic diagram of the local structure of the middle connecting frame and the angle measuring device.

[0025] Figure 6 4 is a cross-sectional view of a steering column according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] 100. Steering column;

[0028] 10. Telescopic position measurement component;

[0029] 1. first lead screw; 11. first transmission section; 12. first connecting section;

[0030] 2. first nut; 21. first connecting portion;

[0031] 3. Angle measuring device; 31. Rotating part; 32. Fixed part; 321. Clamping part;

[0032] 4. Connecting frame; 41. Second connecting part; 42. Mounting cavity; 43. First bearing; 44. Second bearing; 401. First housing; 402. Second housing; 403. Fixing block; 4031. Card slot;

[0033] 5. second nut; 51. second transmission section; 52. second connecting section;

[0034] 6. second lead screw; 61. third connecting portion;

[0035] 7. driving member; 71. output shaft; 72. mounting seat;

[0036] 8. Transmission gear;

[0037] 91, first screw; 92, second screw; 93, third screw;

[0038] 20. Pipe string body;

[0039] 201, first column tube; 2011, first bracket; 202, second column tube; 2021, second bracket; 203, third column tube; 2031, third bracket;

[0040] 30. Steering shaft. DETAILED DESCRIPTION

[0041] 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.

[0042] like Figures 1 to 3 As shown, the telescopic position measuring assembly 10 of the embodiment of the present invention comprises a first lead screw 1, a first nut 2 and a rotation angle measuring device 3, wherein the first nut 2 is threadedly matched with the first lead screw 1. At least a part of the rotation angle measuring device 3 is connected to the first lead screw 1 to detect the number of rotations of the first lead screw 1.

[0043] When the telescopic position measuring assembly 10 of the embodiment of the present invention is used, the first nut 2 can be connected to the first component, and the first screw 1 can be connected to the second component, so that when the first screw 1 rotates relative to the first nut 2, the second component can be driven to move relative to the first component along the axial direction of the first screw 1. The number of rotations of the first screw 1 can be detected by the rotation angle measuring device 3, and the moving distance of the first nut 2 relative to the first screw 1 can be calculated, and the moving distance is the moving distance of the second component relative to the first component, so that the telescopic position of the second component can be obtained.

[0044] For example, Figure 4 and Figure 5 As shown, the telescopic position measuring assembly 10 is used for telescopic adjustment of the steering column 100, wherein the steering column 100 includes a first column tube 201 and a second column tube 202, the first column tube 201 can move along the axial direction of the second column tube 202, the first nut 2 is connected to the first column tube 201, and the first screw 1 is connected to the second column tube 202. That is, the first column tube 201 is equivalent to the above-mentioned first component, and the second column tube 202 is equivalent to the above-mentioned second component. The telescopic position of the steering column 100 can be calculated by detecting the number of rotations of the first screw 1 using the rotation angle measuring device 3.

[0045] Therefore, compared with the related technology of using a Hall sensor to detect the number of rotations of the drive motor and using the number of rotations of the drive motor to calculate the movement distance of the nut relative to the screw in the screw-nut mechanism, the measurement error caused by the mechanical transmission tolerance and the disturbance of the driving components can be reduced, thereby improving the measurement accuracy of the telescopic position measurement assembly and reducing the risk of damage to the screw-nut mechanism due to impact on the mechanical stop point.

[0046] In some embodiments, Figure 1 and Figure 2 As shown, the telescopic position measuring assembly 10 further includes a connecting frame 4, and the first lead screw 1 is rotatably connected to the connecting frame 4. The rotation angle measuring device 3 includes a rotating portion 31 and a fixed portion 32, the rotating portion 31 is rotatably connected to the fixed portion 32, the rotating portion 31 is connected to the first lead screw 1, and the fixed portion 32 is connected to the connecting frame 4.

[0047] It can be understood that the rotation angle measuring device 3 generally includes a fixed part and a rotating part, and the rotating part rotates with the rotating member (such as the first screw 1) relative to the fixed part, and the number of rotations of the rotating member is obtained by detecting the number of rotations of the rotating part. By connecting the rotating part 31 of the rotation angle measuring device 3 to the first screw 1, and connecting the fixed part 32 of the rotation angle measuring device 3 to the connecting frame 4, when the first screw 1 rotates relative to the first nut 2, the rotating part 31 can rotate with the first screw 1 relative to the fixed part 32, thereby realizing the measurement of the number of rotations of the first screw 1.

[0048] The arrangement of the connecting frame 4 facilitates the installation and fixation of the rotating part 31 and the fixing part 32 of the rotation angle measuring device 3 .

[0049] Alternatively, if Figure 1 As shown, the first nut 2 has a first connecting portion 21 , and the connecting frame 4 has a second connecting portion 41 .

[0050] When the telescopic position measuring assembly 10 is used, the first connecting portion 21 is fixedly connected to the first component, and the second connecting portion 41 is fixedly connected to the second component. Figure 4 and Figure 5 As shown, the first connection portion 21 is connected to the first column tube 201 via a first screw 91 , and the second connection portion 41 is connected to the second column tube 202 via a second screw 92 .

[0051] Therefore, when installing and fixing the telescopic position measuring assembly 10 , it is only necessary to fix the first connecting portion 21 and the second connecting portion 41 to corresponding components, which facilitates the installation and fixing of the telescopic position measuring assembly 10 .

[0052] Alternatively, if Figure 3 As shown, the first screw 1 includes a first transmission section 11 and a first connecting section 12 arranged in sequence along its axial direction, the first nut 2 is threadedly matched with the first transmission section 11, the first connecting section 12 is rotatably connected to the connecting frame 4, and the rotating part 31 is connected to the first connecting section 12.

[0053] For example, the first transmission section 11 is provided with a first external thread, the first nut 2 is provided with a first internal thread, the first internal thread is threadably matched with the first external thread, the outer peripheral surface of the first connecting section 12 is a smooth cylindrical surface, and the smooth cylindrical surface is rotatably connected to the connecting frame 4 and connected to the rotating part 31.

[0054] By setting the first lead screw 1 to include a first transmission section 11 and a first connecting section 12, using the first transmission section 11 to threadably cooperate with the first nut 2, and using the first connecting section 12 to connect with the connecting frame 4 and the rotating part 31, the first lead screw 1 can be designed with different structures according to the different functions of each section of the first lead screw 1, thereby facilitating the connection of the first lead screw 1 with the connecting frame 4 and the rotating part 31, which is conducive to improving the assembly efficiency of the telescopic position measurement assembly 10

[0055] Optionally, the rotating portion 31 is annular, and the rotating portion 31 is sleeved on the first connecting section 12 and has an interference fit with the first connecting section 12 .

[0056] Therefore, when connecting the angle measuring device 3 and the first screw 1, it is only necessary to put the rotating part 31 on the first connecting section 12 to realize the connection between the rotating part 31 and the first screw 1, which facilitates the connection between the angle measuring device 3 and the first screw 1 and is conducive to further improving the assembly efficiency of the telescopic position measuring component 10.

[0057] Alternatively, if Figure 2 , Figure 3 and Figure 5 As shown, the connecting frame 4 includes a fixing block 403 , the fixing block 403 is provided with a slot 4031 , and the fixing portion 32 includes a clamping portion 321 , the clamping portion 321 is clamped with the slot 4031 , so as to realize the connection between the fixing portion 32 and the connecting frame 4 .

[0058] For example, the clamping portion 321 is an elastic clamping portion, and the clamping portion 321 is clamped with the clamping slot 4031 through elastic deformation.

[0059] In the related art, when a Hall sensor is used to measure the number of rotations of a drive motor, since the Hall sensor outputs a single angle sensor signal and lacks redundant calibration, there may be failure problems such as zero point drift due to factors such as temperature changes, resulting in inaccurate measurement of the telescopic position of the steering column and increasing the risk of the screw nut mechanism impacting the mechanical stop point and being damaged.

[0060] Optionally, the angle measuring device 3 is a steering wheel angle sensor.

[0061] The steering wheel angle sensor has high redundancy and high measurement accuracy. By setting the angle measuring device 3 as a steering wheel angle sensor, it is possible to avoid failure problems such as zero drift of the angle measuring device 3 caused by factors such as temperature changes, thereby further improving the measurement accuracy of the telescopic position of the components and further reducing the risk of damage to the screw nut mechanism due to impact on the mechanical stop point. Figures 4 to 6 As shown, when the telescopic position measuring assembly 10 of the embodiment of the present invention is used for the steering column 100, the safety level of the measurement signal of the steering column 100 can reach ASILD, wherein ASILD is the highest level of functional safety level in ISO 26262.

[0062] Alternatively, if Figure 3 As shown, the telescopic position measuring assembly 10 further includes a first bearing 43 sleeved on the first connecting section 12, the inner ring of the first bearing 43 is connected to the first connecting section 12, and the outer ring of the first bearing 43 is connected to the connecting frame 4. In other words, the first connecting section 12 is rotatably connected to the connecting frame 4 through the first bearing 43.

[0063] For example, Figure 3 As shown, the connecting frame 4 includes a first shell 401 and a second shell 402, the first shell 401 and the second shell 402 are connected to form a mounting cavity 42, and the first bearing 43 is arranged in the mounting cavity 42. The inner ring of the first bearing 43 is interference fit with the first connecting section 12 to achieve the connection between the inner ring of the first bearing 43 and the first connecting section 12; the outer ring of the first bearing 43 is connected to the second shell 402 through a snap ring to achieve the connection between the outer ring of the first bearing 43 and the connecting frame 4. The first shell 401 and the second shell 402 can be connected by bolts or snap-fit.

[0064] The first connecting section 12 is rotatably connected to the connecting frame 4 via the first bearing 43 , which is beneficial to improving the connection reliability between the first lead screw 1 and the connecting frame 4 , thereby improving the reliability of the telescopic position measuring assembly 10 .

[0065] In some embodiments, Figure 1 and Figure 3As shown, the telescopic position measuring assembly 10 further includes a second nut 5, a second lead screw 6 and a driving member 7, wherein the second nut 5 is coaxially arranged and connected to the first lead screw 1. The second lead screw 6 is arranged on a side of the second nut 5 away from the first nut 2 and is threadedly matched with the second nut 5. The driving member 7 includes an output shaft 71, which is transmission-connected to the first lead screw 1 or the second nut 5.

[0066] When the telescopic position measuring assembly 10 of the embodiment of the present invention is in use, the first nut 2 can be connected to the first component, the first screw 1 can be connected to the second component, and the second screw 6 can be connected to the third component, so that the first screw 1 can drive the second component to move relative to the first component and the third component to move relative to the second component along the axial direction of the first screw 1.

[0067] For example, Figure 4 and Figure 6 As shown, the steering column 100 also includes a third column tube 203, and the second lead screw 6 is connected to the third column tube 203. When the first lead screw 1 rotates, the first nut 2 is driven to rotate relative to the first lead screw 1, thereby driving the first column tube 201 to move relative to the second column tube 202 along the axial direction of the first lead screw 1; at the same time, the second nut 5 is rotated relative to the second lead screw 6, thereby driving the second column tube 202 to move relative to the third column tube 203 along the axial direction of the second lead screw 6, thereby realizing the rapid telescopic adjustment of the steering column 100. In addition, since the second nut 5 is coaxially arranged and connected with the first lead screw 1, one driving member 7 can drive the movement of two sets of lead screw and nut mechanisms, so that while realizing the rapid telescopic adjustment of the steering column 100, the number of parts of the telescopic position measuring assembly 10 can be reduced, and the cost of the telescopic position measuring assembly 10 can be reduced.

[0068] It should be noted that, in order to improve the telescopic adjustment speed of the steering column 100, the rotation speed of the first screw 1 is usually set to be relatively large, and the larger the rotation speed of the first screw 1, the worse the measurement accuracy of the angle measuring device 3. The telescopic position measuring assembly 10 of the embodiment of the present invention can realize the telescopic adjustment of the steering column 100 through multiple sets of screw-nut mechanisms, so that while ensuring that the telescopic adjustment speed of the steering column 100 is relatively large, the rotation speed of the screw in a single set of screw-nut mechanisms can be set to be relatively small, that is, the rotation speed of the first screw 1 can be set to be relatively small, thereby improving the measurement accuracy of the angle measuring device 3 and further improving the measurement accuracy of the telescopic position of the components.

[0069] Alternatively, if Figure 1 and Figure 3 As shown, the second lead screw 6 has a third connecting portion 61, such as Figure 4 As shown, the third connection portion 61 is connected to the third column tube 203 via a third screw 93 .

[0070] Optionally, the driving member 7 includes a mounting seat 72, the output shaft 71 is rotatably connected to the mounting seat 72, and the mounting seat 72 is connected to the connecting frame 4. The mounting seat 72 and the rotation angle measuring device 3 are respectively arranged on opposite sides of the connecting frame 4 in the axial direction of the first screw 1.

[0071] For example, Figure 1 and Figure 3 As shown, the mounting seat 72 is arranged on a side of the connecting frame 4 away from the first nut 2 , and the rotation angle measuring device 3 is arranged on a side of the connecting frame 4 close to the first nut 2 .

[0072] Thus, the interference between the driving member 7 and the rotation angle measuring device 3 can be effectively avoided, and the assembly of the telescopic position measuring assembly 10 is further facilitated.

[0073] Optionally, the telescopic position measuring assembly 10 further includes a transmission gear 8 , which is connected to the output shaft 71 of the driving member 7 , the transmission gear 8 is provided with meshing teeth, and the second nut 5 is provided with external teeth, which mesh with the meshing teeth.

[0074] For example, Figure 3 As shown, the transmission gear 8 is an external gear, and the transmission gear 8 is sleeved on the output shaft 71 and fixedly connected to the output shaft 71 .

[0075] The meshing of the transmission gear 8 with the external teeth of the second nut 5 can not only play the role of a speed reduction mechanism, but also improve the transmission efficiency between the driving member 7 and the second nut 5 .

[0076] Optionally, the second nut 5 includes a second transmission section 51 and a second connecting section 52, the second connecting section 52 is arranged on a side of the second transmission section 51 away from the first screw 1, and the second transmission section 51 is transmission-connected to the output shaft 71. The telescopic position measuring assembly 10 also includes a second bearing 44 sleeved on the second connecting section 52, the inner ring of the second bearing 44 is connected to the second connecting section 52, and the outer ring of the second bearing 44 is connected to the connecting frame 4.

[0077] For example, the second transmission section 51 is provided with external teeth, which mesh with the meshing teeth of the transmission gear 8 to realize the transmission connection between the output shaft 71 and the second nut 5. The outer diameter of the second connecting section 52 is smaller than the diameter of the second transmission section 51, and the outer peripheral surface of the second connecting section 52 is a smooth cylindrical surface. The inner ring of the second bearing 44 is interference fit with the second connecting section 52 to realize the connection between the inner ring of the second bearing 44 and the second connecting section 52; the outer ring of the second bearing 44 is connected to the first housing 401 through a snap ring to realize the connection between the outer ring of the second bearing 44 and the connecting frame 4.

[0078] The second connecting section 52 is rotatably connected to the connecting frame 4 via the second bearing 44 , which is beneficial to improving the connection reliability between the second nut 5 and the connecting frame 4 , thereby improving the reliability of the telescopic position measuring assembly 10 .

[0079] Alternatively, if Figure 3 As shown, a closed chamber is formed between the first housing 401, the second housing 402, the first lead screw 1 and the second nut 5, and the transmission gear 8, the second nut 5, the first bearing 43 and the second bearing 44 are all arranged in the closed chamber.

[0080] By arranging the transmission gear 8, the second nut 5, the first bearing 43 and the second bearing 44 in a closed chamber, the closed chamber can be used to protect the transmission gear 8, the second nut 5, the first bearing 43 and the second bearing 44, effectively preventing impurities such as dust from entering the transmission gear 8, the second nut 5, the first bearing 43 and the second bearing 44, affecting the operating reliability of the transmission gear 8, the second nut 5, the first bearing 43 and the second bearing 44, which is conducive to further improving the reliability of the telescopic position measurement assembly 10.

[0081] Optionally, the first lead screw 1 and the second nut 5 are integrally injection molded.

[0082] For example, the first lead screw 1 is a metal part, and the second nut 5 is a plastic part, or the first lead screw 1 is a plastic part, and the second nut 5 is a metal part, and the first lead screw 1 and the second nut 5 are integrally injection molded.

[0083] The first lead screw 1 and the second nut 5 are integrally injection molded, which, on the one hand, facilitates the processing and manufacturing of the first lead screw 1 and the second nut 5; on the other hand, is conducive to improving the connection reliability between the first lead screw 1 and the second nut 5, thereby helping to improve the reliability of the telescopic position measurement assembly 10.

[0084] Preferably, the first lead screw 1 is a metal part, and the second nut 5 is a plastic part.

[0085] It is understandable that the length of the lead screw is usually longer, and there is a greater risk of breakage when the lead screw is made of plastic; while the length of the nut is usually shorter, and there is a lower risk of breakage when the nut is made of plastic, which is beneficial to improving the reliability of the telescopic position measurement component 10.

[0086] like Figures 4 to 6 As shown, the steering column 100 of the embodiment of the present invention includes a column body 20 and a telescopic position measuring assembly 10, wherein the column body 20 includes a first column tube 201 and a second column tube 202, wherein the second column tube 202 is movably connected to the first column tube 201 along the length direction of the first column tube 201. The telescopic position measuring assembly 10 is the telescopic position measuring assembly 10 of any of the above embodiments, wherein the first nut 2 is connected to the first column tube 201, and the first lead screw 1 is connected to the second column tube 202. The length direction of the first column tube 201 is parallel to the axial direction of the first lead screw 1. The first column tube 201 is equivalent to the first component in the above embodiments, and the second column tube 202 is equivalent to the second component in the above embodiments.

[0087] Therefore, the telescopic position measuring assembly 10 can be used to realize the movement of the second column tube 202 relative to the first column tube 201, and the angle measuring device 3 arranged on the first screw 1 can be used to realize the telescopic position measurement of the steering column 100, thereby improving the telescopic position measurement accuracy of the steering column 100, reducing the risk of damage to the screw nut mechanism due to impact on the mechanical stop point, and improving the reliability and safety of the steering column 100.

[0088] Optionally, a portion of the second column vial 202 is inserted into the first column vial 201 and tightly fits with the first column vial 201 , so that the second column vial 202 can slide relative to the first column vial 201 .

[0089] When the telescopic position measuring assembly 10 further includes a second lead screw 6 and a second nut 5 , the column body 20 further includes a third column tube 203 , and the third column tube 203 is connected to the second lead screw 6 .

[0090] Optionally, a portion of the third column vial 203 is inserted into the second column vial 202 and tightly fits with the second column vial 202 , so that the second column vial 202 can slide relative to the third column vial 203 .

[0091] Alternatively, if Figure 4 As shown, the steering column 100 further includes a first bracket 2011, a second bracket 2021 and a third bracket 2031. The first bracket 2011 is fixedly connected to the first column tube 201, the second bracket 2021 is fixedly connected to the second column tube 202, and the third bracket 2031 is fixedly connected to the third column tube 203. The first connecting portion 21 is a first connecting ear, the second connecting portion 41 is a second connecting ear, and the end of the second lead screw 6 away from the first nut 2 forms a third connecting portion 61. The first connecting ear is connected to the first bracket 2011 through a first screw 91, the second connecting ear is connected to the second bracket 2021 through a second screw 92, and the end of the second lead screw 6 away from the first nut 2 is connected to the third bracket 2031 through a third screw 93.

[0092] For example, the first bracket 2011 is welded to the first column tube 201 , the second bracket 2021 is welded to the second column tube 202 , and the third bracket 2031 is welded to the third column tube 203 .

[0093] The assembly method of the steering column 100 according to the embodiment of the present invention is as follows:

[0094] The steering shaft 30 is assembled in the first column tube 201 through the bearing support; the first column tube 201 is tightly fitted in the second column tube 202, and the first column tube 201 can slide relative to the second column tube 202; the second column tube 202 is tightly fitted in the third column tube 203, and the second column tube 202 can slide relative to the third column tube 203. The end of the second screw 6 away from the first nut 2 is fixed to the third column tube 203 by the third screw 93, the connecting frame 4 is fixed to the second column tube 202 by the second screw 92, and the first nut 2 is fixed to the first column tube 201 by the first screw 91. The output shaft 71 of the driving member 7 is interference fit with the transmission gear 8, and the transmission gear 8 is meshed with the outer teeth of the second nut 5. The rotating part 31 of the angle measuring device 3 is interference fit with the first connecting section 12 of the first screw 1; the fixed part 32 of the angle measuring device 3 is connected to the connecting frame 4 through the clamping part 321, so that the rotating part 31 of the angle measuring device 3 rotates coaxially and at the same angle as the first screw 1.

[0095] When the steering column 100 is telescopically adjusted, the rotating part 31 of the angle measuring device 3 rotates with the first lead screw 1, so that the angle of the rotating part 31 relative to the fixed part 32 changes, and the number of rotations of the rotating part 31 can be obtained. Specifically, when the first lead screw 1 rotates, it drives the first nut 2 to move along the axial direction of the first lead screw 1, and the first nut 2 drives the first column tube 201 to move relative to the second column tube 202 along the axial direction of the first lead screw 1. At this time, the moving distance of the first column tube 201 relative to the second column tube 202 is the product of the number of rotations measured by the angle measuring device 3 and the pitch of the internal thread of the first nut 2; at the same time, it drives the second lead screw 6 to move along the axial direction of the first lead screw 1, and the second lead screw 6 drives the second column tube 202 to move relative to the third column tube 203 along the axial direction of the second lead screw 6. At this time, the moving distance of the second column tube 202 relative to the third column tube 203 is the product of the number of rotations measured by the angle measuring device 3 and the pitch of the internal thread of the second nut 5. Then the moving distance of the first column tube 201 relative to the third column tube 203 is the product of the number of rotations of the first screw 1 and the pitch of the internal thread of the first nut 2 plus the product of the number of rotations of the first screw 1 and the pitch of the internal thread of the second nut 5. Since the first column tube 201 is connected to the steering shaft 30 through a bearing, the moving distance of the first column tube 201 is the moving distance of the steering shaft 30, and the moving distance of the steering shaft 30 is the moving distance of the steering wheel.

[0096] The steering column 100 of the embodiment of the present invention can accurately measure the telescopic position of the steering column 100 by simply installing the angle measuring device 3 on one of the lead screws of the telescopic position measuring assembly 10. Compared with other solutions, it has a simple structure, lower cost, simple installation, convenient disassembly and maintenance, and small space occupation. In addition, there is no need to change the mechanical structure of the steering column 100, and it can achieve telescopic position measurement with higher accuracy, smaller error, and larger stroke.

[0097] The vehicle according to the embodiment of the present invention includes the telescopic position measuring assembly 10 according to any one of the above embodiments and / or the steering column 100 according to any one of the above embodiments.

[0098] Specifically, the vehicle of the embodiment of the present invention includes the telescopic position measuring assembly 10 described in any of the above embodiments, but does not include the steering column 100 described in any of the above embodiments, that is, the telescopic position measuring assembly 10 is used for the telescopic adjustment of components other than the steering column; or, the vehicle of the embodiment of the present invention includes the steering column 100 described in any of the above embodiments, that is, the telescopic position measuring assembly 10 is only used for the telescopic adjustment of the steering column 100, but not for the telescopic adjustment of components other than the steering column; or, the vehicle of the embodiment of the present invention includes the telescopic position measuring assembly 10 described in any of the above embodiments and the steering column 100 described in any of the above embodiments, that is, the telescopic position measuring assembly 10 is not only used for the telescopic adjustment of the steering column 100, but also for the telescopic adjustment of components other than the steering column.

[0099] When a vehicle includes the steering column 100 described in any of the above embodiments, the third column tube 203 can be connected to the vehicle body through a mounting bracket, so that the entire steering column 100 is installed on the vehicle.

[0100] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative 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 telescopic position measuring assembly, characterized in that: include: First lead screw; a first nut, the first nut being threadably matched with the first lead screw; A rotation angle measuring device, at least a portion of which is connected to the first lead screw to detect the number of rotations of the first lead screw.

2. The telescopic position measuring assembly according to claim 1, characterized in that: The telescopic position measurement assembly further includes a connecting frame, and the first lead screw is rotatably connected to the connecting frame; The rotation angle measuring device comprises a rotating part and a fixed part, the rotating part is rotationally connected to the fixed part, the rotating part is connected to the first lead screw, and the fixed part is connected to the connecting frame.

3. The telescopic position measuring assembly according to claim 2, characterized in that: The first lead screw includes a first transmission section and a first connecting section arranged in sequence along its axial direction, the first nut is threadedly matched with the first transmission section, the first connecting section is rotatably connected to the connecting frame, and the rotating portion is connected to the first connecting section.

4. The telescopic position measuring assembly according to claim 3, characterized in that: The rotating portion is annular, and is sleeved on the first connecting section and has an interference fit with the first connecting section; and / or The telescopic position measuring assembly further includes a first bearing sleeved on the first connecting section, an inner ring of the first bearing is connected to the first connecting section, and an outer ring of the first bearing is connected to the connecting frame.

5. The telescopic position measuring assembly according to claim 2, characterized in that: The telescopic position measurement assembly also includes: a second nut, the second nut being coaxially arranged and connected to the first lead screw; a second lead screw, the second lead screw being disposed on a side of the second nut away from the first nut and being threadably matched with the second nut; A driving member, wherein the driving member comprises an output shaft, and the output shaft is drivingly connected to the first lead screw or the second nut.

6. The telescopic position measuring assembly according to claim 5, characterized in that: The second nut comprises a second transmission section and a second connecting section sequentially arranged along the axial direction of the first screw, the second transmission section is drivingly connected to the output shaft, the telescopic position measuring assembly further comprises a second bearing sleeved on the second connecting section, the inner ring of the second bearing is connected to the second connecting section, and the outer ring of the second bearing is connected to the connecting frame; and / or The telescopic position measuring assembly further comprises a transmission gear connected to the output shaft, the transmission gear is provided with meshing teeth, and the second nut is provided with external teeth meshing with the meshing teeth.

7. The telescopic position measuring assembly according to claim 5, characterized in that: The driving member comprises a mounting seat, the output shaft is rotatably connected to the mounting seat, and the mounting seat is connected to the connecting frame; The mounting seat and the rotation angle measuring device are respectively arranged on opposite sides of the connecting frame in the axial direction of the first lead screw.

8. The telescopic position measuring assembly according to any one of claims 1 to 7, characterized in that: The angle measuring device is a steering wheel angle sensor.

9. A steering column, characterized in that: include; A column body, the column body comprising a first column tube and a second column tube, the second column tube being movably connected to the first column tube along a length direction of the first column tube; A telescopic position measuring assembly, wherein the telescopic position measuring assembly is the telescopic position measuring assembly according to any one of claims 1 to 8, wherein the first nut is connected to the first column tube, and the first lead screw is connected to the second column tube.

10. A vehicle, characterized in that: The invention comprises the telescopic position measuring assembly according to any one of claims 1 to 8 and / or the steering column according to claim 9.

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