Telescopic adjusting assembly, steering device and vehicle

Abstract

The invention discloses a telescopic adjusting assembly, a steering device and a vehicle, the telescopic adjusting assembly comprises a lead screw and a nut, the nut comprises a first ring body, a fixing body and a shearing part, the first ring body is arranged on the lead screw in a sleeving mode and is in threaded fit with the lead screw, and the fixing body is arranged on the first ring body; the fixing body is arranged on the radial outer side of the first ring body, the fixing body and the first ring body are arranged in a spaced mode, and the shearing part is arranged between the first ring body and the fixing body and connected with the first ring body and the fixing body. Through the structural design of the nut, the nut in the telescopic adjusting assembly plays a role of a shear pin of the crumple energy absorption assembly in the related technology, so that the shear pin does not need to be additionally arranged on the steering device, and the weight and the radial size of the steering device are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steering control devices, and in particular to a telescopic adjustment component, a steering device and a vehicle. Background Art

[0002] The electric steering device eliminates the locking and releasing mechanism (handle mechanism) of the traditional mechanical column, and drives the telescopic adjustment of the steering device through the telescopic adjustment component. Specifically, the steering device includes a first column tube and a second column tube that are nested, and the telescopic adjustment component includes a screw nut mechanism arranged between the first column tube and the second column tube. The screw nut mechanism drives the second column tube to move relative to the first column tube along the axial direction of the first column tube to achieve the telescopic adjustment of the steering device.

[0003] In a frontal collision accident of the whole vehicle, the steering device needs to withstand the forward impact force through the crushing function and provide crushing deformation energy absorption to reduce the damage to the driver during the collision. In the related art, a crushing energy absorption component is set between the first column tube and the second column tube to realize the crushing function. Specifically, the crushing energy absorption component includes a crush bracket and an energy absorption strip, the crush bracket is connected to the second column tube through a shear nail, and the crush bracket is connected to the first column tube; the energy absorption strip is set on the crush bracket, and one end of the energy absorption strip is connected to the second column tube. When a frontal collision accident occurs to the steering device, the impact force first causes the shear nail to be cut, and then the second column tube drives the energy absorption strip to move in the crushing direction, so that the energy absorption strip is crushed, deformed and absorbs energy. The above-mentioned telescopic adjustment component and the crushing energy absorption component are set independently of each other, and both need to occupy space in the radial direction of the first column tube, resulting in a large weight and radial size of the steering device, which is not conducive to the installation and arrangement of the steering device in the whole vehicle. 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 adjustment assembly to reduce the weight and radial size of the steering device.

[0006] The telescopic adjustment assembly of the present invention includes a screw and a nut, the nut includes a first ring body, a fixed body and a shearing portion, the first ring body is sleeved on the screw and is threadedly matched with the screw, the fixed body is arranged on the radially outer side of the first ring body and is spaced apart from the first ring body, and the shearing portion is arranged between the first ring body and the fixed body, and is connected to the first ring body and the fixed body.

[0007] Optionally, the fixed body includes a second ring body, the second ring body is sleeved on the first ring body, and the shearing portion is connected to the first ring body and the fixed body.

[0008] Optionally, the shearing portion is a shearing column extending radially along the first ring body, and there are multiple shearing portions, which are arranged at intervals along the circumference of the first ring body.

[0009] Optionally, the telescopic adjustment assembly also includes a collapse piece, which is arranged on the radially outer side of the first ring body and connected to the fixed body, and the collapse piece includes a collapse section, which is arranged on the axial side of the first ring body, and the collapse section has a collapse hole coaxially arranged with the first ring body; the first ring body includes an interference section, and the outer diameter of the interference section is larger than the aperture of the collapse hole, so that the interference section and the collapse hole are interference fit.

[0010] Optionally, the diameter of the collapse hole is larger than the diameter of the lead screw; and / or the collapse part and the nut are integrally injection molded.

[0011] Optionally, the diameter of the collapse hole is larger than the diameter of the lead screw; and / or the collapse part and the nut are integrally injection molded.

[0012] Optionally, at the connection between the shearing portion and the first ring body, the circumferential dimension of the shearing portion is smaller than the circumferential dimension of the first ring body, and / or the axial dimension of the shearing portion is smaller than the axial dimension of the first ring body; at the connection between the shearing portion and the fixed body, the circumferential dimension of the shearing portion is smaller than the circumferential dimension of the fixed body, and / or the axial dimension of the shearing portion is smaller than the axial dimension of the fixed body; the collapse member also includes a connecting section, which is embedded between the first ring body and the fixed body.

[0013] Optionally, the shearing portion is a shearing column extending radially along the first ring body, the connecting section has a connecting hole penetrating radially along the first ring body, and the shearing portion is embedded in the connecting hole; and / or, the outer peripheral surface of the connecting section is provided with a connecting groove extending axially along the first ring body, and a part of the fixed body is embedded in the connecting groove.

[0014] Optionally, the connecting section includes a guide section, the guide section is arranged on a side of the shearing portion close to the collapse section, and the interference section is arranged on a side of the shearing portion away from the collapse section; the guide section is cylindrical, the inner diameter of the guide section gradually decreases along the direction close to the collapse section, the outer diameter of the end of the guide section away from the collapse section is greater than or equal to the outer diameter of the interference section, and the outer diameter of the end of the guide section close to the collapse section is less than or equal to the outer diameter of the interference section, and / or, an annular groove is provided on the outer circumferential surface of the guide section, the annular groove is arranged on a side of the shearing portion close to the collapse section and is spaced apart from the shearing portion, and a part of the fixed body is embedded in the annular groove.

[0015] The invention also provides a steering device.

[0016] The steering device of the present invention includes a telescopic adjustment component and a column body, wherein the telescopic adjustment component is the telescopic adjustment component described in any one of the above items; 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 axial direction of the first column tube, the lead screw is connected to the first column tube, and the nut is connected to the second column tube.

[0017] The present invention also provides a vehicle.

[0018] The vehicle of the present invention includes any one of the steering devices described above.

[0019] When the telescopic adjustment assembly of the present invention is used specifically, the lead screw can be connected to the first column tube of the steering device, and the nut can be connected to the second column tube of the steering device. By rotating the lead screw and using the nut to cooperate with the lead screw thread, the nut can be driven to move along the axial direction of the lead screw, thereby driving the second column tube to move along the axial direction of the first column tube, thereby realizing the telescopic adjustment of the steering device. When the whole vehicle collides head-on, the steering device will collapse due to the impact force transmitted by the head-on collision, and the second column tube has a tendency to move toward the first column tube. The second column tube is connected to the fixed body so that the collapse force is transmitted to the fixed body. Due to the self-locking effect between the lead screw and the nut, the lead screw and the first ring body will remain relatively fixed, and the collapse force will cut off the shearing portion of the nut, so that the fixed body moves relative to the first ring body, and then the second column tube moves toward the first column tube, that is, the steering device collapses. Through the above-mentioned structural design of the nut, the nut in the telescopic adjustment assembly plays the role of the shear pin of the crush energy absorption assembly in the related technology, so that there is no need to additionally set shear pins on the steering device, thereby reducing the weight of the steering device and eliminating the radial space additionally occupied by the shear pins, thereby facilitating the installation and layout of the steering device on the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a steering device according to an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 AA view.

[0022] Figure 3 yes Figure 2 A partial enlarged view of point B in the middle.

[0023] Figure 4 yes Figure 1 Cross-sectional view of the nut.

[0024] Figure 5 yes Figure 1 Cross-sectional view of the collapse component.

[0025] Reference numerals:

[0026] 100. Steering device;

[0027] 10. Telescopic adjustment component;

[0028] 1. Lead screw; 11. First connecting portion; 12. External thread;

[0029] 2. Nut; 21. First ring body; 211. Internal thread; 212. Interference section; 213. Guide section; 22. Fixed body; 221. Second connecting portion; 222. Second ring body; 2221. First section; 2222. Second section; 2223. Third section; 223. Ring platform; 23. Shearing section;

[0030] 3. Collapse member; 31. Collapse section; 311. Collapse hole; 32. Connecting section; 321. Connecting hole; 322. Connecting groove; 323. Ring groove; 324. Guide section;

[0031] 20, column body; 201, first column tube; 202, second column tube; 203, steering shaft;

[0032] 30. reducer; 301. housing; 302. bearing;

[0033] 40. Drive motor. DETAILED DESCRIPTION

[0034] 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.

[0035] like Figure 1 and Figure 2 As shown, the telescopic adjustment assembly 10 of the embodiment of the present invention includes a lead screw 1 and a nut 2, wherein the nut 2 includes a first ring body 21, a fixed body 22 and a shearing portion 23, wherein the first ring body 21 is sleeved on the lead screw 1 and threadedly matched with the lead screw 1. The fixed body 22 is arranged on the radially outer side of the first ring body 21 and is spaced apart from the first ring body 21, and the shearing portion 23 is arranged between the first ring body 21 and the fixed body 22, and is connected to the first ring body 21 and the fixed body 22. Among them, the structural strength of the shearing portion 23 is less than the structural strength of the first ring body 21 and the structural strength of the fixed body 22, and when there is an interaction force between the first ring body 21 and the fixed body 22 in the axial direction of the first ring body 21, the shearing portion 23 is the first to break.

[0036] like Figure 1As shown, when the telescopic adjustment assembly 10 of the embodiment of the present invention is used, the lead screw 1 can be connected to the first column tube 201 of the steering device 100, and the nut 2 can be connected to the second column tube 202 of the steering device 100. By rotating the lead screw 1 and using the threaded fit between the nut 2 and the lead screw 1, the nut 2 can be driven to move along the axial direction of the lead screw 1, thereby driving the second column tube 202 to move along the axial direction of the first column tube 201, thereby achieving the telescopic adjustment of the steering device 100. When the whole vehicle is in a frontal collision, the steering device 100 will move along the axial direction due to the impact force transmitted by the frontal collision. Figure 1 The second column tube 202 tends to move toward the first column tube 201 by collapsing in the K direction. The second column tube 202 is connected to the fixed body 22 so that the collapsing force is transmitted to the fixed body 22. Due to the self-locking effect between the lead screw 1 and the nut 2, the lead screw 1 and the first ring body 21 will remain relatively fixed. The collapsing force will shear the shearing portion 23 of the nut 2, so that the fixed body 22 moves relative to the first ring body 21, and then the second column tube 202 moves toward the first column tube 201, that is, the steering device 100 collapses.

[0037] Through the above-mentioned structural design of the nut 2, the nut 2 in the telescopic adjustment assembly 10 plays the role of the shear pin of the crush energy absorption assembly in the related art, so that there is no need to additionally set shear pins on the steering device 100, thereby reducing the weight of the steering device 100 and eliminating the radial space additionally occupied by the shear pins, thereby facilitating the installation and arrangement of the steering device 100 on the whole vehicle.

[0038] like Figure 2 and Figure 3 As shown, the screw 1 is provided with an external thread 12, such as Figure 4 As shown, the first ring body 21 is provided with an internal thread 211 , and the internal thread 211 is threadably matched with the external thread 12 .

[0039] In some embodiments, Figures 1 to 3 As shown, the telescopic adjustment assembly 10 also includes a collapse member 3, which is arranged on the radial outer side of the first ring body 21 and connected to the fixed body 22. The collapse member 3 includes a collapse section 31, which is arranged on one axial side of the first ring body 21. The collapse section 31 has a collapse hole 311 coaxially arranged with the first ring body 21. The first ring body 21 includes an interference section 212, and the outer diameter of the interference section 212 is larger than the aperture of the collapse hole 311, so that the interference section 212 and the collapse hole 311 are interference-fitted.

[0040] As shown above, when the vehicle is in a frontal collision, the steering device 100 moves along Figure 1The nut 2 collapses in the K direction, and the collapse force will shear off the shearing portion 23 of the nut 2; then the fixed body 22 will drive the collapse member 3 to move relative to the first ring body 21 in the direction away from the collapse section 31. Since the first ring body 21 and the collapse hole 311 are coaxially arranged, and the outer diameter of the interference section 212 is larger than the aperture of the collapse hole 311, the interference section 212 of the first ring body 21 enters the collapse hole 311 during the movement, and the interference section 212 and the collapse hole 311 are used to provide an interference force between the interference section 212 and the collapse hole 311, which serves as a collapse stabilizing force to reduce the damage to the driver during the collision.

[0041] Thus, the collapse member 3 of the telescopic adjustment assembly 10 plays the role of the energy absorbing member of the collapse energy absorbing assembly in the related art, and the collapse member 3 is connected with the nut 2, so that the nut 2 also plays the role of the collapse bracket of the collapse energy absorbing assembly in the related art, which is conducive to further reducing the weight and radial size of the steering device 100. In addition, the collapse hole 311 of the collapse section 31 is coaxially arranged with the first ring body 21, so that the collapse member 3 mainly occupies the axial space of the first column tube 201, and rarely or even does not occupy the radial space of the first column tube 201, which is conducive to further reducing the weight and radial size of the steering device 100.

[0042] It is understandable that by adjusting the interference amount between the interference section 212 and the collapse hole 311, the interference force between the interference section 212 and the collapse hole 311 can be adjusted, thereby adjusting the collapse stabilizing force. In the design stage, the interference amount between the interference section 212 and the collapse hole 311 can be adjusted as needed to adjust the collapse stabilizing force.

[0043] Alternatively, if Figure 2 and Figure 3 As shown, the diameter of the collapse hole 311 is larger than the diameter of the lead screw 1 .

[0044] Thus, the lead screw 1 can be moved into the collapse hole 311 , so that there can be a larger relative displacement between the lead screw 1 and the nut 2 , which is beneficial to improving the telescopic adjustment stroke of the steering device 100 .

[0045] Optionally, the crushing member 3 and the nut 2 are integrally injection molded.

[0046] For example, the crushing piece 3 is a metal piece and the nut 2 is a plastic piece; or, the crushing piece 3 is a plastic piece and the nut 2 is a metal piece, and the crushing piece 3 and the nut 2 are integrally injection molded so that a part of the metal piece is embedded in the plastic piece, thereby realizing the connection between the metal piece and the plastic piece.

[0047] The integral injection molding of the collapse member 3 and the nut 2 is beneficial to reducing the number of parts of the telescopic adjustment assembly 10 , facilitating the assembly of the telescopic adjustment assembly 10 , and reducing the assembly cost of the telescopic adjustment assembly 10 .

[0048] Alternatively, if Figure 2 and Figure 3 As shown, at the connection between the shearing portion 23 and the first ring body 21, the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the first ring body 21, and / or, the axial dimension of the shearing portion 23 is smaller than the axial dimension of the first ring body 21. In other words, at the connection between the shearing portion 23 and the first ring body 21, the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the first ring body 21, and the axial dimension of the shearing portion 23 is smaller than the axial dimension of the first ring body 21; or, the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the first ring body 21, and the axial dimension of the shearing portion 23 is equal to the axial dimension of the first ring body 21; or, the circumferential dimension of the shearing portion 23 is equal to the circumferential dimension of the first ring body 21, and the axial dimension of the shearing portion 23 is smaller than the axial dimension of the first ring body 21. The axial dimension of the shearing portion 23 refers to: the dimension of the shearing portion 23 in the circumferential direction of the first ring body 21.

[0049] At the connection between the shearing portion 23 and the fixed body 22, the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the fixed body 22, and / or the axial dimension of the shearing portion 23 is smaller than the axial dimension of the fixed body 22. In other words: at the connection between the shearing portion 23 and the fixed body 22, the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the fixed body 22, and the axial dimension of the shearing portion 23 is smaller than the axial dimension of the fixed body 22; or, the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the fixed body 22, and the axial dimension of the shearing portion 23 is equal to the axial dimension of the fixed body 22; or, the circumferential dimension of the shearing portion 23 is equal to the circumferential dimension of the fixed body 22, and the axial dimension of the shearing portion 23 is smaller than the axial dimension of the fixed body 22. The circumferential dimension of the fixed body 22 refers to: the dimension of the fixed body 22 in the circumferential direction of the first ring body 21.

[0050] The collapse member 3 further includes a connecting section 32 , and the connecting section 32 is embedded between the first ring body 21 and the fixed body 22 .

[0051] By setting the circumferential dimension of the shearing portion 23 to be smaller than the circumferential dimension of the first ring body 21, and / or, the axial dimension of the shearing portion 23 is set to be smaller than the axial dimension of the first ring body 21; the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the fixed body 22, and / or, the axial dimension of the shearing portion 23 is smaller than the axial dimension of the fixed body 22, so that a space is enclosed between the shearing portion 23 and the first ring body 21 and the fixed body 22, and the connecting section 32 is embedded in the space, thereby realizing the connection between the crushing piece 3 and the first ring body 21 and the fixed body 22.

[0052] By embedding the connecting section 32 between the first ring body 21 and the fixed body 22 , it is beneficial to increase the connection area between the collapse member 3 and the nut 2 , thereby improving the connection reliability of the collapse member 3 and the nut 2 , and improving the reliability of the telescopic adjustment assembly 10 .

[0053] Preferably, at the connection between the shearing portion 23 and the first ring body 21, the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the first ring body 21, and the axial dimension of the shearing portion 23 is smaller than the axial dimension of the first ring body 21. At the connection between the shearing portion 23 and the fixed body 22, the circumferential dimension of the shearing portion 23 is smaller than the circumferential dimension of the fixed body 22, and the axial dimension of the shearing portion 23 is smaller than the axial dimension of the fixed body 22.

[0054] Therefore, the structural strength of the shearing portion 23 is conveniently made smaller than the structural strength of the first ring body 21 and the structural strength of the fixing body 22 .

[0055] Of course, in other embodiments, at the connection between the shearing portion 23 and the first ring body 21, the circumferential dimension of the shearing portion 23 may be equal to the circumferential dimension of the first ring body 21, and the axial dimension of the shearing portion 23 may be equal to the axial dimension of the first ring body 21. At the connection between the shearing portion 23 and the fixed body 22, the circumferential dimension of the shearing portion 23 may be equal to the circumferential dimension of the fixed body 22, and the axial dimension of the shearing portion 23 may be equal to the axial dimension of the fixed body 22. And the cutting portion 23 is made of a material with a weaker structural strength, and the first ring body 21 and the fixed body 22 are made of a material with a stronger structural strength. For example, the cutting portion 23 is made of a plastic material, and the first ring body 21 and the fixed body 22 are made of a metal material.

[0056] Alternatively, if Figures 3 to 5 As shown, the shearing portion 23 is a shearing column extending in the radial direction of the first ring body 21. The connecting section 32 has a connecting hole 321 penetrating in the radial direction of the first ring body 21, and the shearing portion 23 is embedded in the connecting hole 321.

[0057] By setting the shearing portion 23 as a shearing column and embedding the shearing portion 23 in the connecting hole 321, it is beneficial to further improve the connection reliability between the crushing member 3 and the nut 2, and it is beneficial to further improve the reliability of the telescopic adjustment assembly 10. In addition, when the crushing member 3 and the nut 2 are integrally injection molded, by adjusting the circumferential dimension or axial dimension of the connecting hole 321, the length and width of the shearing portion 23 can be adjusted, thereby achieving the adjustment of the crushing force and the shearing force, which is convenient for adjusting the crushing shearing force as needed in the design stage.

[0058] Among them, the circumferential size of the connecting hole 321 refers to: the size of the connecting hole 321 in the circumferential direction of the first ring body 21; the axial size of the connecting hole 321 refers to: the size of the connecting hole 321 in the axial direction of the first ring body 21; the collapse shear force refers to: the collapse force when the shear portion 23 is sheared.

[0059] Optionally, a connecting groove 322 extending along the axial direction of the first ring body 21 is provided on the outer circumferential surface of the connecting section 32 , and a part of the fixing body 22 is embedded in the connecting groove 322 .

[0060] By embedding a portion of the fixed body 22 in the connecting groove 322, on the one hand, it is beneficial to increase the connection area between the nut 2 and the crushing part 3, thereby further improving the reliability of the telescopic adjustment assembly 10; on the other hand, the portion of the fixed body 22 embedded in the connecting groove 322 can effectively transmit the torque between the nut 2 and the crushing part 3, thereby further improving the reliability of the telescopic adjustment assembly 10.

[0061] Alternatively, if Figure 5 As shown, there are multiple connecting grooves 322 , and the multiple connecting grooves 322 are evenly arranged along the circumference of the collapse hole 311 .

[0062] The number of the connecting grooves 322 is set to be multiple, which is beneficial to further improve the reliability of the telescopic adjustment component 10.

[0063] Preferably, if Figure 5 As shown, the plurality of connecting grooves 322 form spline grooves.

[0064] Alternatively, if Figure 3 and Figure 4 As shown, the axial dimension of the shearing portion 23 is smaller than the axial dimension of the first ring body 21 and the axial dimension of the fixed body 22. The connecting section 32 includes a guide section 324, which is arranged on the side of the shearing portion 23 close to the crushing section 31, and the interference section 212 is arranged on the side of the shearing portion 23 away from the crushing section 31. The guide section 324 is cylindrical, and the inner diameter of the guide section 324 gradually decreases in the direction close to the crushing section 31. The outer diameter of the end of the guide section 324 away from the crushing section 31 is greater than or equal to the outer diameter of the interference section 212, and the outer diameter of the end of the guide section 324 close to the crushing section 31 is less than or equal to the outer diameter of the interference section 212.

[0065] When the fixed body 22 drives the collapse member 3 to move relative to the first ring body 21 in the direction away from the collapse section 31 , the interference section 212 first enters the connecting section 32 from the end with the larger inner diameter of the guide section 324 , and then enters the collapse hole 311 under the guidance of the guide section 324 .

[0066] Therefore, the guide section 213 guides the interference section 212 to enter the shrinkage hole 311, which can effectively prevent the interference section 212 from getting stuck at the end of the shrinkage hole 311 and being unable to enter the shrinkage hole 311, which is beneficial to further improve the reliability of the telescopic adjustment component 10.

[0067] like Figure 3 and Figure 4As shown, the first ring body 21 includes a guide section 213, which is arranged on a side of the shearing portion 23 close to the crushing section 31, and an interference section 212 is arranged on a side of the shearing portion 23 away from the crushing section 31. The outer circumference of the guide section 213 fits with the inner circumference of the guide section 324, so that the outer diameter of the guide section 213 gradually decreases in the direction close to the crushing section 31, the outer diameter of the end of the guide section 213 close to the crushing section 31 is less than or equal to the outer diameter of the interference section 212, and the outer diameter of the end of the guide section 213 away from the crushing section 31 is greater than or equal to the outer diameter of the interference section 212.

[0068] By setting a guide section 213 on the side of the shear portion 23 close to the collapse section 31, and the outer diameter of the guide section 213 gradually decreases in the direction close to the collapse section 31, when the fixed body 22 drives the collapse member 3 to move relative to the first ring body 21 in the direction away from the collapse section 31, the end of the guide section 213 with a smaller outer diameter will first enter the collapse hole 311, and then the interference section 212 will enter the collapse hole 311 under the guidance of the outer peripheral surface of the guide section 213.

[0069] Alternatively, if Figures 2 to 4 As shown, the fixed body 22 includes a second ring body 222 , and the second ring body 222 is sleeved on the first ring body 21 .

[0070] By setting the fixed body 22 as the second ring body 222, and the second ring body 222 is sleeved on the first ring body 21, the fixed body 22 can be subjected to force at all circumferential locations, which is beneficial to improving the force uniformity of the nut 2, thereby avoiding damage to the nut 2 due to excessive local force, and further improving the reliability of the telescopic adjustment assembly 10.

[0071] Optionally, there are multiple shearing portions 23 , and the multiple shearing portions 23 are arranged at intervals along the circumference of the first ring body 21 .

[0072] For example, the number of the shearing portions 23 is four, and the four shearing portions 23 are evenly spaced along the circumference of the first ring body 21 .

[0073] It can be understood that the force between the fixed body 22 and the first ring body 21 is mainly transmitted through the shear portion 23. By providing a plurality of shear portions 23 and arranging the plurality of shear portions 23 at intervals along the circumference of the first ring body 21, it is beneficial to improve the uniformity of the force on the whole nut 2, thereby avoiding damage to the nut 2 due to excessive local force, and further improving the reliability of the telescopic adjustment assembly 10.

[0074] Alternatively, if Figure 3 and Figure 5 As shown, the outer peripheral surface of the guide section 324 is provided with an annular groove 323, which is provided on the side of the shearing portion 23 close to the collapse section 31 and is spaced apart from the shearing portion 23. A part of the fixed body 22 is embedded in the annular groove 323. Figure 4 As shown, the portion of the fixing body 22 embedded in the annular groove 323 forms an annular platform 223 .

[0075] The portion of the fixed body 22 embedded in the annular groove 323 connects the fixed body 22 and the crushing member 3 together and is used to transmit the axial force between the fixed body 22 and the crushing member 3. Figure 1 The shear portion 23 collapses in the K direction, and after the shear portion 23 is cut off, the fixed body 22 can more reliably drive the collapse member 3 to move relative to the first ring body 21, which is beneficial to further improve the reliability of the telescopic adjustment assembly 10.

[0076] like Figure 3 and Figure 4 As shown, the second ring body 222 includes a first section 2221, a second section 2222 and a third section 2223, the first section 2221, the second section 2222 and the third section 2223 are all cylindrical, the interference section 212 and the guide section 213 are both cylindrical, the first section 2221 is arranged corresponding to the interference section 212 and is spaced apart from the interference section 212, so that the space between the first section 2221 and the interference section 212 is filled with a part of the collapse member 3; the second section 2222 is arranged corresponding to the guide section 213 and is spaced apart from the guide section 213, so that the space between the second section 2222 and the guide section 213 is filled with a part of the collapse member 3, and the third section 2223 is arranged corresponding to the shearing portion 23 to achieve the connection between the shearing portion 23 and the guide section 213.

[0077] This is beneficial to further improve the connection reliability between the nut 2 and the collapse member 3, thereby helping to further improve the reliability of the telescopic adjustment assembly 10.

[0078] Alternatively, if Figure 1 As shown, the lead screw 1 has a first connection portion 11, and the first connection portion 11 is used to connect with the first column tube 201. The fixed body 22 has a second connection portion 221, and the second connection portion 221 is used to connect with the second column tube 202. The first connection portion 11 and the first column tube 201 can be directly connected, or indirectly connected through other components. The second connection portion 221 and the second column tube 202 can be directly connected, or indirectly connected through other components.

[0079] For example, Figure 1 As shown, the end of the lead screw 1 away from the collapse member 3 is rotatably connected to the first column tube 201, and the end of the lead screw 1 away from the collapse member 3 forms the first connection portion 11. Connecting ears are provided on both radial sides of the second ring body 222, and the connecting ears are connected to the second column tube 202 by bolts, and the connecting ears form the above-mentioned second connection portion 221.

[0080] The internal connection details of the nut 2 and the crushing member 3 after injection molding of the telescopic adjustment assembly 10 of the embodiment of the present invention are as follows: the outer circumference of the first ring body 21 is molded to fit the inner circumference of the connecting section 32; the inner circumference of the second ring body 222 is molded to fit the outer circumference of the connecting section 32; the shear portion 23 is molded to fit the hole wall of the connecting hole 321. After the nut 2 and the crushing member 3 are injection molded, a part of the nut 2 fills the connecting groove 322 of the connecting section 32, which is used to transmit the torque between the nut 2 and the crushing member 3; the annular platform 223 of the nut 2 fills the annular groove 323 of the connecting section 32, which is used to transmit the axial force between the nut 2 and the crushing member 3.

[0081] The steering device 100 of the embodiment of the present invention includes a telescopic adjustment component 10 and a column body 20. The telescopic adjustment component 10 is the telescopic adjustment component 10 of any of the above embodiments. The column body 20 includes a first column tube 201 and a second column tube 202. The second column tube 202 is movably connected to the first column tube 201 along the axial direction of the first column tube 201. The lead screw 1 is connected to the first column tube 201, and the nut 2 is connected to the second column tube 202.

[0082] The steering device 100 according to the embodiment of the present invention has the advantages of light weight and small radial size.

[0083] Alternatively, if Figure 1 and Figure 2 As shown, the steering device 100 further includes a reducer 30 and a drive motor 40, the drive motor 40 is transmission-connected to the reducer 30, the reducer 30 is transmission-connected to the lead screw 1, and the drive motor 40 is used to drive the lead screw 1 to rotate. The reducer 30 includes a housing 301, the housing 301 is connected to the first column tube 201, and the first connecting portion 11 of the lead screw 1 is rotationally connected to the housing 301 through a bearing 302. A mounting frame is provided on the second column tube 202, and the connecting ear is connected to the mounting frame of the second column tube 202 by bolts.

[0084] like Figure 1 As shown, the column body 20 further includes a steering shaft 203 , which is rotatably connected to the second column tube 202 .

[0085] The vehicle according to the embodiment of the present invention includes the steering device 100 according to any one of the above embodiments.

[0086] Reference below Figures 1 to 3The installation method of the steering device 100 of the embodiment of the present invention is described as follows: the steering shaft 203 is assembled in the second column tube 202 through the bearing support, the second column tube 202 is tightly fitted in the first column tube 201, and the second column tube 202 can slide relative to the first column tube 201. The first column tube 201 is connected to the vehicle body through the mounting bracket, and the entire steering device 100 is installed on the vehicle body. The reducer 30 is fixed on the first column tube 201, the drive motor 40 is installed on one side of the reducer 30, the reducer 30 is connected to the lead screw 1, and the lead screw 1 is threadedly connected to the nut 2. The nut 2 is connected to the mounting bracket of the second column tube 202 by bolts.

[0087] When the vehicle collides head-on, the steering wheel is subjected to the impact force transmitted from the airbag, and the column body 20 collapses in the downward direction ( Figure 1 The second column tube 202 will collapse in the axial direction of the first column tube 201, and the movement of the second column tube 202 will transmit the collapse force to the nut 2. Due to the self-locking effect of the screw 1 and the nut 2, the screw 1 self-locks the first ring body 21 of the nut 2 in the initial position. The collapse force will shear the shear portion 23 of the nut 2 to form a shear force. The collapse shear force can be adjusted by adjusting the cross-sectional size of the shear portion 23. Since the annular platform 223 of the nut 2 and the annular groove 323 of the crusher 3 are connected together by injection molding, the guide section 213 will drive the crusher 3 to move downward together, and the interference section 212 of the nut 2 moves into the crush hole 311 of the crusher 3 under the guidance of the guide section 324. Since the outer diameter of the interference section 212 is greater than or equal to the inner diameter of the crush hole 311, interference compression is formed between the interference section 212 and the crush hole 311 and an interference force is provided. The interference force can be used as a crush stabilizing force, and the size of the crush stabilizing force can be adjusted by the difference between the outer diameter of the interference section 212 and the aperture of the crush hole 311.

[0088] The steering device 100 of the present embodiment integrates the crush energy absorption component into the telescopic adjustment component 10, and has the advantages of a small number of parts, a simple structure, a simple assembly process, a low cost, a light weight, a small empty space, and easy adjustment of the crush characteristics.

[0089] 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 adjustment component, characterized in that: include: Lead screw; A nut, comprising a first ring body, a fixed body and a shearing portion, wherein the first ring body is sleeved on the lead screw and threadably matched with the lead screw, the fixed body is arranged on the radially outer side of the first ring body and is spaced apart from the first ring body, and the shearing portion is arranged between the first ring body and the fixed body and is connected to the first ring body and the fixed body.

2. The telescopic adjustment assembly according to claim 1, characterized in that: The fixing body comprises a second ring body, the second ring body is sleeved on the first ring body, and the second ring body is connected to the first ring body through the shearing portion.

3. The telescopic adjustment assembly according to claim 2, characterized in that: The shearing portion is a shearing column extending in the radial direction of the first ring body. There are a plurality of the shearing portions, and the plurality of the shearing portions are arranged at intervals in the circumferential direction of the first ring body.

4. The telescopic adjustment assembly according to claim 1, characterized in that: The telescopic adjustment assembly further includes a collapse member, which is arranged on the radial outer side of the first ring body and connected to the fixed body, and the collapse member includes a collapse segment, which is arranged on one axial side of the first ring body, and the collapse segment has a collapse hole coaxially arranged with the first ring body; The first ring body comprises an interference section, the outer diameter of which is larger than the diameter of the collapse hole, so that the interference section and the collapse hole are interference-fitted.

5. The telescopic adjustment assembly according to claim 4, characterized in that: The diameter of the collapse hole is larger than the diameter of the lead screw; and / or The collapse member and the nut are integrally injection-molded.

6. The telescopic adjustment assembly according to claim 4, characterized in that: At the connection between the shearing portion and the first ring body, the circumferential dimension of the shearing portion is smaller than the circumferential dimension of the first ring body, and / or the axial dimension of the shearing portion is smaller than the axial dimension of the first ring body; At the connection between the shearing portion and the fixed body, the circumferential dimension of the shearing portion is smaller than the circumferential dimension of the fixed body, and / or the axial dimension of the shearing portion is smaller than the axial dimension of the fixed body; The collapse member further includes a connecting section, and the connecting section is embedded between the first ring body and the fixed body.

7. The telescopic adjustment assembly according to claim 6, characterized in that: The shearing portion is a shearing column extending in the radial direction of the first ring body, the connecting section has a connecting hole penetrating in the radial direction of the first ring body, and the shearing portion is embedded in the connecting hole; and / or The outer peripheral surface of the connecting section is provided with a connecting groove extending along the axial direction of the first ring body, and a part of the fixing body is embedded in the connecting groove.

8. The telescopic adjustment assembly according to claim 6, characterized in that: The connecting section comprises a guide section, the guide section is arranged on a side of the shearing portion close to the collapse section, and the interference section is arranged on a side of the shearing portion away from the collapse section; The guide section is cylindrical, the inner diameter of the guide section gradually decreases in the direction close to the collapse section, the outer diameter of the end of the guide section away from the collapse section is greater than or equal to the outer diameter of the interference section, and the outer diameter of the end of the guide section close to the collapse section is less than or equal to the outer diameter of the interference section, and / or An annular groove is provided on the outer circumferential surface of the guide section. The annular groove is provided on a side of the shearing portion close to the collapse section and is spaced apart from the shearing portion. A part of the fixing body is embedded in the annular groove.

9. A steering device, characterized in that: include: A telescopic adjustment component, wherein the telescopic adjustment component is the telescopic adjustment component according to any one of claims 1 to 8; The column body comprises a first column tube and a second column tube, the second column tube is movably connected to the first column tube along the axial direction of the first column tube, the lead screw is connected to the first column tube, and the nut is connected to the second column tube.

10. A vehicle, characterized in that: Includes the steering device as described in claim 9.

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