Motor assembly, tubular column assembly, steering system and vehicle

Abstract

The utility model discloses a motor assembly, a tubular column assembly, a steering system and a vehicle. The motor comprises a gear box, an elastic piece and a motor body, a transmission cavity is formed in the gear box, the elastic piece is arranged in the transmission cavity, the motor body comprises a motor shaft, the motor shaft extends into the transmission cavity, the motor shaft abuts against the elastic piece in the axial direction, and the elastic piece abuts against the box wall of the gear box in the axial direction. According to the motor assembly provided by the embodiment of the invention, the elastic piece plays a role in axially limiting the motor shaft, and provides compensation for the axial displacement of the motor shaft, so that the structure of the motor assembly is optimized, an axial limiting and positioning copper sleeve is omitted, the total weight of the motor assembly can be reduced, and the energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor assembly, a column assembly, a steering system and a vehicle. Background Art

[0002] In the related art, the motor shaft of the motor is axially limited by a positioning copper sleeve. Due to the setting of the positioning copper sleeve, the axial displacement of the motor shaft cannot be compensated, and the total weight of the motor is too heavy, which increases energy consumption. Utility Model Content

[0003] The present application aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present application proposes a motor assembly that can compensate for the axial displacement of the motor shaft and is conducive to reducing the total weight of the motor assembly, reducing energy consumption and reducing power consumption.

[0004] The present application also proposes a pipe string assembly having the above motor assembly.

[0005] The present application also proposes a steering system having the above-mentioned column assembly.

[0006] The present application also proposes a vehicle having the above steering system.

[0007] According to an embodiment of the present application, the motor assembly includes a gearbox, an elastic member and a motor. The gearbox has a transmission cavity inside, the elastic member is arranged in the transmission cavity, and the motor includes a motor shaft, which extends into the transmission cavity. The motor shaft axially stops against the elastic member, and the elastic member axially stops against the box wall of the gearbox.

[0008] According to the motor assembly of the embodiment of the present application, the motor shaft stops against the elastic part, and the elastic part stops against the box wall of the gear box. The elastic part plays a role in axially limiting the motor shaft and providing compensation for the axial displacement of the motor shaft, thereby optimizing the structure of the motor assembly and eliminating the axial limiting positioning copper sleeve, thereby reducing the total weight of the motor assembly and reducing energy consumption.

[0009] In some embodiments of the present application, a first bearing hole is provided on the box wall of the gear box, the first bearing hole forms a part of the transmission cavity, the motor shaft is rotatably supported in the first bearing hole through a first bearing, and the motor shaft stops at the elastic member after passing through the first bearing hole.

[0010] In some embodiments of the present application, the elastic member includes a wear-resistant pad and an elastic column, the wear-resistant pad is located between the first bearing hole and the elastic column, the motor shaft stops against the wear-resistant pad, the wear-resistant pad stops against the elastic column, and the elastic column stops against the box wall of the gear box.

[0011] In some embodiments of the present application, one of the wear-resistant pad and the elastic column has a positioning column hole, and the other includes a main body and a protrusion connected to the main body, the protrusion is embedded in the positioning column hole, and the main body is located outside one axial end of the positioning column hole.

[0012] In some embodiments of the present application, the positioning column hole and the first bearing hole are coaxially arranged.

[0013] In some embodiments of the present application, the motor assembly further includes a bracket, the gearbox is fixed to the bracket, a fixed column connection structure is provided on the bracket, and the fixed column connection structure is suitable for fixed connection with the column fixed column of the steering column.

[0014] In some embodiments of the present application, the gear box and the bracket are snap-fitted together via at least one snap-fit ​​structure, and each of the snap-fit ​​structures includes a snap-fit ​​protrusion provided on one of the gear box and the bracket and a snap-fit ​​hole provided on the other, and the snap-fit ​​protrusion is suitable for snap-fitting together with the snap-fit ​​hole.

[0015] In some embodiments of the present application, the gearbox includes a box body and a box cover, the transmission chamber is formed in the box body, a plurality of fixing columns are provided on the box body, the box cover is provided at an opening at one end of the box body, and the fixing columns pass through the box cover.

[0016] In some embodiments of the present application, the fixing column is a glue column, and after the fixing column passes through the box cover, the box cover is fixed to the box body through a hot riveting process.

[0017] In some embodiments of the present application, a first limiting structure and a second limiting structure are provided in the transmission cavity, and the motor assembly also includes a first transmission wheel, which is installed in the transmission cavity. The motor is used to drive the first transmission wheel to rotate, and one axial end of the first transmission wheel is stopped and engaged with the first limiting structure.

[0018] In some embodiments of the present application, the motor assembly further includes a sealing ring and a flat washer. A mounting groove is provided on the positioning end surface of the first transmission wheel, the mounting groove being arranged along the circumference of the first transmission wheel, and the sealing ring is mounted within the mounting groove. One axial side of the flat washer abuts against the sealing ring, while the other axial side of the flat washer abuts against the second limiting structure.

[0019] In some embodiments of the present application, the motor further includes a motor housing and a sealing plug, a second bearing hole and a third bearing hole are provided in the motor housing, the motor shaft is rotatably supported in the second bearing hole through a second bearing and is rotatably supported in the third bearing hole through a third bearing, the second bearing hole is provided on the side of the motor housing away from the gear box, and a sealing hole is also provided on the side of the motor housing away from the gear box, the second bearing hole is located between the sealing hole and the third bearing hole, and the sealing plug is installed in the sealing hole.

[0020] In some embodiments of the present application, the axial dimension of the elastic member is 5 mm to 8 mm, and the weight of the elastic member is less than 0.5 g.

[0021] A pipe string assembly according to yet another embodiment of the present application includes the above-mentioned motor assembly.

[0022] According to the tubular column assembly of the embodiment of the present application, the motor shaft of its motor assembly stops at the elastic part, and the elastic part stops at the box wall of the gear box. The elastic part plays a role in axially limiting the motor shaft and providing compensation for the axial displacement of the motor shaft, thereby optimizing the structure of the motor assembly and eliminating the axial limiting positioning copper sleeve, thereby reducing the total weight of the motor assembly and reducing energy consumption.

[0023] In some embodiments of the present application, the motor assembly also includes a bracket and a screw, the gear box is fixed to the bracket, a first transmission wheel is provided in the gear box, the motor is used to drive the first transmission wheel to rotate, and the first transmission wheel is used to drive the screw to move linearly. The pipe column assembly also includes a pipe column moving column, the bracket is fixed to the pipe column fixed column, and the screw is transmission-connected to the pipe column moving column.

[0024] A steering system according to yet another embodiment of the present application includes the above-mentioned column assembly.

[0025] According to the steering system of the embodiment of the present application, the motor shaft of its motor assembly stops at an elastic part, and the elastic part stops at the box wall of the gear box. The elastic part plays a role in axially limiting the motor shaft and providing compensation for the axial displacement of the motor shaft, thereby optimizing the structure of the motor assembly and eliminating the axial limiting positioning copper sleeve, thereby reducing the total weight of the motor assembly and reducing energy consumption.

[0026] A vehicle according to yet another embodiment of the present application includes the above-mentioned steering system.

[0027] According to the vehicle of the embodiment of the present application, the motor shaft of the motor assembly in its steering system stops at an elastic part, and the elastic part stops at the box wall of the gear box. The elastic part plays a role in axially limiting the motor shaft and providing compensation for the axial displacement of the motor shaft, thereby optimizing the structure of the motor assembly and eliminating the axial limiting positioning copper sleeve, thereby reducing the total weight of the motor assembly and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is an exploded view of a motor assembly according to some embodiments of the present application;

[0029] Figure 2 yes Figure 1 a front view of the motor assembly shown;

[0030] Figure 3 It is a structural diagram of the bracket;

[0031] Figure 4 It is the structural diagram of the box;

[0032] Figure 5 yes Figure 2 AA section of the motor assembly shown;

[0033] Figure 6 yes Figure 2 BB section of the motor assembly shown;

[0034] Figure 7 is a left side view of a motor assembly according to some embodiments of the present application;

[0035] Figure 8 is a top view of a motor assembly according to some embodiments of the present application;

[0036] Figure 9 is a right side view of a motor assembly according to some embodiments of the present application;

[0037] Figure 10 This is an exploded view of the motor;

[0038] Figure 11 is a cross-sectional view of the motor;

[0039] Figure 12 is a cross-sectional view of the elastic member;

[0040] Figure 13 is a schematic diagram of a tubing string assembly according to an embodiment of the present application;

[0041] Figure 14 is a schematic diagram of a steering system according to an embodiment of the present application;

[0042] Figure 15 is a schematic diagram of a vehicle according to an embodiment of the present application.

[0043] Reference numerals:

[0044] Vehicle 1000, steering system 200, column assembly 100, motor assembly 10, gearbox 1, housing 11, fixing column 111, first bearing hole 112, first housing hole 113, transmission cavity 114, first limiting structure 115, second limiting structure 116, housing cover 12, elastic member 23, wear-resistant pad 2, wear-resistant pad body 21, wear-resistant pad protrusion 22, elastic column 3, elastic column hole 31, motor 4, motor shaft 41, second transmission wheel 411, motor housing 42, rotor 43, stator 44, motor cover 45, rubber cover assembly 46, sealing plug 47, second bearing hole 48, third bearing hole 49, first shaft Bearing 51, second bearing 52, third bearing 53, bracket 6, fixed column connecting structure 61, first support plate 62, second support plate 63, connecting plate 64, first bracket hole 621, second bracket hole 631, first clamping protrusion 701, first clamping hole 702, second clamping protrusion 703, second clamping hole 704, third clamping protrusion 705, third clamping hole 706, fastening screw 8, first transmission wheel 91, sleeve part 911, gear part 912, positioning end face 913, screw 92, moving column connecting structure 921, limiting nut 93, sealing ring 94, flat washer 95, pipe column fixed column 20, pipe column moving column 30. DETAILED DESCRIPTION

[0045] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0046] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0047] The following combination Figures 1-15 A motor assembly 10 , a column assembly 100 including the motor assembly 10 , a steering system 200 including the column assembly 100 , and a vehicle 1000 including the steering system 200 according to an embodiment of the present application are described in detail.

[0048] Reference Figure 1 、 Figure 2 、 Figure 4 、 Figure 5As shown, the motor assembly 10 according to the embodiment of the present application includes a gearbox 1, an elastic member 23 and a motor 4. The interior of the gearbox 1 has a transmission cavity 114, the elastic member 23 is arranged in the transmission cavity 114, and the motor 4 includes a motor shaft 41. The motor shaft 41 extends into the transmission cavity 114, and the motor shaft 41 stops at the elastic member 23 in the axial direction, and the elastic member 23 stops at the box wall of the gearbox 1 in the axial direction.

[0049] The elastic member 23 serves to axially limit the motor shaft 41. When the motor assembly 10 is operating, the motor shaft 41 is subjected to axial force while rotating. This axial force drives the motor shaft 41 to move axially. However, because the motor shaft 41 abuts against the elastic member 23, and the elastic member 23 abuts against the wall of the gearbox 1, the elastic member 23 can axially limit the motor shaft 41, and the axial position of the motor shaft 41 is determined. At the same time, the elastic member 23 replaces the axial limiting copper sleeve in the related art to serve as an axial limiter, lightweighting the motor assembly 10 and reducing the energy consumption of the motor assembly 10 during operation.

[0050] The elastic member 23 undergoes a certain degree of elastic deformation when squeezed. When the motor shaft 41 experiences slight axial movement, the elastic member 23 absorbs the axial displacement of the motor shaft 41, ensuring that the motor shaft 41 always abuts against the elastic member 23. Thus, the elastic member 23 serves to axially limit the motor shaft 41. For example, when the motor shaft 41 moves toward the elastic member 23, the elastic deformation of the elastic member 23 increases; when the motor shaft 41 moves away from the elastic member 23, the elastic deformation of the elastic member 23 decreases.

[0051] Optionally, the elastic member 23 may be a rubber member, a silicone member, etc.

[0052] In the related art, the motor shaft of the motor is axially limited by a positioning copper sleeve. Due to the setting of the positioning copper sleeve, the axial displacement of the motor shaft cannot be compensated, and the total weight of the motor is too heavy, which increases energy consumption. According to the motor assembly 10 of the embodiment of the present application, the motor shaft 41 stops at the elastic member 23, and the elastic member 23 stops at the gear box wall. The elastic member 23 plays a role in axially limiting the motor shaft 41 and provides compensation for the axial displacement of the motor shaft 41. This achieves the optimization of the structure of the motor assembly 10, eliminates the axial limiting positioning copper sleeve, and helps to reduce the total weight of the motor assembly 10 and reduce energy consumption.

[0053] In some embodiments of the present application, see Figure 1 、 Figure 5 As shown, a first bearing hole 112 is provided on the box wall of the gear box 1. The first bearing hole 112 forms a part of the transmission cavity 114. The motor shaft 41 is rotatably supported in the first bearing hole 112 through the first bearing 51. After passing through the first bearing hole 112, the motor shaft 41 stops at the elastic member 23.

[0054] The first bearing 51 comprises a first inner ring and a first outer ring. The first inner ring is sleeved onto the outer wall of the motor shaft 41, while the first outer ring is fixed to the first bearing hole 112. The first inner ring is rotatable relative to the first outer ring, and rotation of the motor shaft 41 drives the first inner ring to rotate synchronously. A rolling element can be positioned between the first inner ring and the first outer ring to prevent direct friction between the first inner ring and the first outer ring. The provision of the first bearing 51 prevents direct friction between the motor shaft 41 and the gearbox 1, thereby extending the service life of the motor assembly 10 and ensuring smoother rotation of the motor shaft 41.

[0055] Optionally, the first bearing 51 may be an oil-containing bearing having a grease groove filled with lubricating grease, thereby enabling self-lubrication of the first bearing 51 without the need to provide a lubricating oil channel on the wall of the gearbox 1 .

[0056] Alternatively, the first bearing 51 may be a grease-free bearing, and a lubricating oil channel may be opened on the box wall of the gearbox 1 , through which lubricating oil may be sprayed onto the first bearing 51 , thereby achieving oil lubrication of the first bearing 51 .

[0057] Optionally, the first bearing 51 may be a deep groove ball bearing, a cylindrical roller bearing, or the like.

[0058] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 12 As shown, the elastic member 23 includes a wear pad 2 and an elastic column 3. The wear pad 2 is located between the first bearing hole 112 and the elastic column 3. The motor shaft 41 abuts the wear pad 2, which in turn abuts the elastic column 3, which in turn abuts the wall of the gearbox 1. Thus, the wear pad 2 and the elastic column 3 act to axially limit the motor shaft 41 in this motor assembly 10. When the motor assembly 10 is operating, the motor shaft 41 is subjected to axial force while rotating. This axial force drives the motor shaft 41 to move axially. However, because the motor shaft 41 abuts the wear pad 2, which abuts the elastic column 3, which abuts the wall of the gearbox 1, the wear pad 2 and the elastic column 3 are able to axially limit the motor shaft 41, and the axial position of the motor shaft 41 is determined. The wear pad 2 and the elastic column 3 replace the axial limiting copper sleeves used in the related art to perform the axial limiting function, making the motor assembly 10 lightweight and reducing the energy consumption of the motor assembly 10 during operation.

[0059] In addition, the elastic column 3 has certain elastic properties and can apply an elastic force toward the motor shaft 41 to the wear-resistant pad 2. This elastic force can make the wear-resistant pad 2 in close contact with the end of the motor shaft 41 and compensate for the axial displacement of the motor shaft 41.

[0060] Optionally, the elastic column 3 may be a rubber column, a silicone column, or the like.

[0061] In some embodiments of the present application, see Figure 1 、 Figure 3 、 Figure 12 As shown, one of the wear-resistant pad 2 and the elastic column 3 has a positioning column hole, and the other includes a main body and a raised portion connected to the main body, the raised portion being embedded in the positioning column hole, and the main body being located outside one axial end of the positioning column hole. As a result, the accuracy of the relative position of the wear-resistant pad 2 and the elastic column 3 can be improved, and the wear-resistant pad 2 and the elastic column 3 are not easily misaligned with each other, which is conducive to improving the reliability of the wear-resistant pad 2 and the elastic column 3 in axially limiting the motor shaft 41. At the same time, there is no need to set up additional components to ensure the relative position of the wear-resistant pad 2 and the elastic column 3, reducing the total weight of the motor assembly 10, thereby reducing power waste of the motor assembly 10 and reducing energy consumption.

[0062] In some embodiments, as Figure 1 、 Figure 3 、 Figure 12 As shown, the elastic column 3 has an elastic column hole 31, the wear-resistant pad 2 includes a wear-resistant pad body 21 and a wear-resistant pad protrusion 22, the wear-resistant pad protrusion 22 is connected to the wear-resistant pad body 21, the wear-resistant pad protrusion 22 is embedded in the elastic column hole 31, and the wear-resistant pad body 21 is located between the first bearing hole 112 and the elastic column 3.

[0063] In some embodiments not shown in the figures, the wear-resistant pad 2 has a wear-resistant pad column hole, the elastic column 3 has an elastic column body and an elastic column protrusion, the elastic column body is connected to the elastic column protrusion, and the elastic column protrusion is embedded in the wear-resistant pad column hole.

[0064] In some embodiments of the present application, see Figure 1 、 Figure 3 、 Figure 12 As shown, the positioning post hole is coaxially arranged with the first bearing hole 112. This ensures that the elastic post 3, the wear-resistant pad 2, and the motor shaft 41 are coaxial. When the motor shaft 41 abuts the wear-resistant pad 2, and the wear-resistant pad 2 abuts the elastic post 3, the motor shaft 41, the wear-resistant pad 2, and the elastic post 3 are less likely to deflect, which is beneficial to improving the working reliability of the motor assembly 10.

[0065] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 3As shown, the motor assembly 10 also includes a bracket 6, to which the gearbox 1 is fixed. Bracket 6 is provided with a fixed column connection structure 61, which is adapted to be fixedly connected to the column fixed column 20 of the steering column. The steering column includes the column fixed column 20 and the column dynamic column 30. Thus, the entire motor assembly 10 is mounted and fixed to the column fixed column 20 via bracket 6, ensuring that the motor assembly 10 remains stable when adjusting the position of the column dynamic column 30.

[0066] Optionally, the fixed connection structure 61 can be a threaded hole, which is used with screws to fix the bracket 6 to the pipe column fixed column 20; the fixed column connection structure 61 can also be a smooth hole, which is used with bolts to fix the bracket 6 to the pipe column fixed column 20, etc.

[0067] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 3 As shown, the gearbox 1 and bracket 6 are engaged with each other via at least one engaging structure. Each engaging structure includes an engaging protrusion provided on one of the gearbox 1 and bracket 6 and an engaging hole provided on the other. The engaging protrusion is adapted to engage with the engaging hole. Thus, by adding engaging structures to the gearbox 1 and bracket 6 for engaging, the gearbox 1 and bracket 6 are securely connected.

[0068] In some embodiments, the gear box 1 and the bracket 6 are engaged with each other through a snap-fitting structure, and the gear box 1 and the bracket 6 are connected at the snap-fitting structure.

[0069] In some embodiments, the gearbox 1 and the bracket 6 are snap-fitted together through multiple snap-fit ​​structures, thereby ensuring the accurate relative position of the gearbox 1 and the bracket 6, preventing the gearbox 1 from flipping relative to the bracket 6, and improving the connection stability between the gearbox 1 and the bracket 6.

[0070] Optionally, the number of the snap-fit ​​structures may be two, three, four or more.

[0071] In some embodiments, there are three snap-fit ​​structures. Specifically, the snap-fit ​​protrusions include a first snap-fit ​​protrusion 701 , a second snap-fit ​​protrusion 703 , and a third snap-fit ​​protrusion 705 , and the snap-fit ​​holes include a first snap-fit ​​hole 702 , a second snap-fit ​​hole 704 , and a third snap-fit ​​hole 706 .

[0072] exist Figure 7-Figure 9In the example shown, the first engaging protrusion 701, the second engaging protrusion 703, and the third engaging protrusion 705 are all provided on the gearbox 1, and the first engaging hole 702, the second engaging hole 704, and the third engaging hole 706 are all provided on the bracket 6. By engaging the first engaging protrusion 701 on the gearbox 1 with the first engaging hole 702 on the bracket 6, the third engaging protrusion 705 on the gearbox 1 with the third engaging hole 706 on the bracket 6, and the second engaging protrusion 703 on the gearbox 1 with the second engaging hole 704 on the bracket 6, the gearbox 1 and the bracket 6 are fixed, ensuring that the relative position of the gearbox 1 and the bracket 6 is fixed when the motor assembly 10 is in operation, thereby improving the operating reliability of the motor assembly 10.

[0073] In some embodiments not shown in the figures, the first engaging protrusion 701, the second engaging protrusion 703, and the third engaging protrusion 705 are all provided on the bracket 6, and the first engaging hole 702, the second engaging hole 704, and the third engaging hole 706 are all provided on the gear box 1. By engaging the first engaging hole 702 on the gear box 1 with the first engaging protrusion 701 on the bracket 6, the third engaging hole 706 on the gear box 1 with the third engaging protrusion 705 on the bracket 6, and the second engaging hole 704 on the gear box 1 with the second engaging protrusion 703 on the bracket 6, the gear box 1 is fixed to the bracket 6, ensuring that the relative position of the gear box 1 and the bracket 6 is fixed when the motor assembly 10 is in operation, thereby improving the operating reliability of the motor assembly 10.

[0074] In some other embodiments not shown in the figures, a portion of the first engaging protrusion 701, the second engaging protrusion 703, and the third engaging protrusion 705 are provided on the gearbox 1, and another portion is provided on the bracket 6. A portion of the first engaging hole 702, the second engaging hole 704, and the third engaging hole 706 are provided on the bracket 6, and another portion is provided on the gearbox 1. By engaging the first engaging hole 702 with the first engaging protrusion 701, the third engaging protrusion 705 with the third engaging hole 706, and the second engaging hole 704 with the second engaging protrusion 703, the gearbox 1 and the bracket 6 are fixed, ensuring that the relative positions of the gearbox 1 and the bracket 6 are fixed when the motor assembly 10 is in operation, thereby improving the operating reliability of the motor assembly 10.

[0075] It should be noted that "the gearbox 1 and the bracket 6 are engaged with each other through at least one engaging structure, and each engaging structure includes a engaging protrusion provided on one of the gearbox 1 and the bracket 6 and a engaging hole provided on the other" means that any engaging position on the gearbox 1 can be a engaging hole or a engaging protrusion. When any engaging position on the gearbox 1 is a engaging hole, the bracket 6 corresponding to this engaging position will be a engaging protrusion, and the gearbox 1 and the bracket 6 will engage with each other at this engaging position. Correspondingly, when any engaging position on the gearbox 1 is a engaging protrusion, the bracket 6 corresponding to this engaging position will be a engaging hole, and the gearbox 1 and the bracket 6 will engage with each other at this engaging position. It can be understood that the gearbox 1 can have N engaging positions, including a engaging holes and b engaging protrusions, and the corresponding bracket 6 also has N engaging positions, including a engaging protrusion and b engaging holes. N is a positive integer, a and b are integers not less than 0, and N = a + b. For example, N can be 1, 2, 3, etc. When N is 3, a can be 1 and b can be 2; when N is 3, a can be 0 and b can be 3; when N is 2, a can be 1 and b can be 1, etc.

[0076] In the related art, the bracket and the gearbox are fixed by screws. Since the gap between the screws and the gearbox through-holes is large, the gearbox is forced to flip over in the bracket under working conditions. The gearbox 1 and the bracket 6 of the motor assembly 10 of the present application are snap-fitted by at least one snap-fit ​​structure, which increases the rotation direction positioning and prevents the gearbox 1 from flipping over in the bracket 6, so that the relative position of the gearbox 1 and the bracket 6 is accurate.

[0077] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 4 As shown, the gearbox 1 includes a housing 11 and a cover 12. A transmission cavity 114 is formed in the housing 11. The housing 11 is provided with a plurality of fixing posts 111. The cover 12 is positioned over an opening at one end of the housing 11, with the fixing posts 111 extending through the cover 12. Thus, the cover 12 and the housing 11 of the gearbox 1 cooperate with each other, improving the stability of the gearbox 1.

[0078] It should be noted that "a plurality of fixing posts 111 are provided on the box body 11" may mean that M fixing posts 111 are provided on the box body 11, where M is a positive integer, for example, M may be 1, 2, 3, etc. Providing a plurality of fixing posts 111 can improve the accuracy of the relative position of the box body 11 and the box cover 12.

[0079] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 4As shown, the fixing column 111 is a rubber column. The fixing column 111 passes through the box cover 12 and fixes the box cover 12 to the box body 11 through a hot riveting process. Therefore, the fixing column 111 fixes the box cover 12 and the box body 11 through the hot riveting process, ensuring the stability of the gearbox 1 when the motor assembly 10 is working, and the box cover 12 and the box body 11 are not easy to separate from each other.

[0080] In some embodiments of the present application, the motor assembly 10 further includes a fastening screw 8 and a fastening nut. The fastening screw 8 passes through the bracket 6, the housing 11, and the housing cover 12 and is then fastened to the fastening nut. Thus, the fastening screw 8 and the fastening nut fasten the bracket 6, the housing 11, and the housing cover 12 into a single unit, ensuring the stable performance of the gearbox 1 during operation of the motor assembly 10.

[0081] In some embodiments, as Figure 7-Figure 9 As shown, the first clamping protrusion 701 is provided on the box cover 12 , and the second clamping protrusion 703 and the third clamping protrusion 705 are both provided on the box body 11 .

[0082] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 As shown, a first limiting structure 115 and a second limiting structure 116 are provided within the transmission cavity 114. The motor assembly 10 also includes a first transmission wheel 91, which is mounted within the transmission cavity 114. The motor 4 is used to drive the first transmission wheel 91 to rotate, with one axial end of the first transmission wheel 91 abutting against the first limiting structure 115. Thus, the motor 4 drives the motor shaft 41 to rotate, which in turn drives the first transmission wheel 91 to rotate. The first transmission wheel causes the column dynamic column 30 to move axially in the direction of the first transmission wheel 91, thereby achieving the purpose of controlling the height adjustment of the steering column through the motor assembly 10. The first transmission wheel 91 is disposed within the gearbox 1, and the first limiting structure 115 prevents the first transmission wheel 91 from moving axially in one direction.

[0083] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 5 、 Figure 6As shown, the motor assembly 10 also includes a sealing ring 94 and a flat washer 95. A mounting groove is provided on the positioning end face 913 of the first transmission wheel 91, and the mounting groove is arranged along the circumference of the first transmission wheel 91, and the sealing ring 94 is installed in the mounting groove. One axial side of the flat washer 95 stops at the sealing ring 94, and the other axial side of the flat washer 95 stops at the second limiting structure 116. Thus, the first transmission wheel 91 is arranged in the gear box 1, and the first limiting structure 115 and the second limiting structure 116 prevent the first transmission wheel 91 from moving in the axial direction. The elastic force generated by the pre-compression deformation of the sealing ring 94 is used to limit the axial virtual position caused by the superposition of the parts processing dimensions, further limiting the axial movement of the first transmission wheel 91 in the gear box 1, thereby improving the stability of the gear box 1 during the operation of the motor assembly 10, thereby reducing the power waste of the motor assembly 10 and reducing energy consumption.

[0084] Alternatively, the sealing ring 94 may be an O-ring.

[0085] In the related art, there is no axial offset compensation structure at the first transmission wheel, and the axial clearance is controlled by the tolerance of the part itself. Due to the part process capability, the clearance tolerance is large. The motor assembly 10 of the present application adopts a combination of a flat washer 95 and a sealing ring 94. The elastic compression of the sealing ring 94 is used to offset the gap accumulated by the tolerance, and the flat washer 95 is used to reduce friction.

[0086] In some embodiments, as Figure 6 As shown, the first limiting structure 115 is a part of the gear box 1 .

[0087] In some embodiments, as Figure 6 As shown, the second limiting structure 116 is a part of the gearbox 1 .

[0088] In some embodiments, the first limiting structure 115 is a separate component. In other words, the first limiting structure 115 is a separate component installed inside the gearbox 1 .

[0089] In some embodiments, the second limiting structure 116 is a separate component. In other words, the second limiting structure 116 is a separate component installed inside the gearbox 1 .

[0090] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 6As shown, the first transmission wheel 91 includes a sleeve portion 911 and a gear portion 912. The gear portion 912 is connected to the sleeve portion 911 and protrudes radially outward from the sleeve portion 911. The axial length of the gear portion 912 is less than the axial length of the sleeve portion 911. The flat washer 95 is sleeved outside the sleeve portion 911. As a result, the first transmission wheel 91 is fixed in the gearbox 1. The first limiting structure 115 and the second limiting structure 116 prevent the first transmission wheel 91 from moving in the axial direction. The elastic force generated by the pre-compression deformation of the sealing ring 94 limits the virtual position caused by the superposition of the machining dimensions of the output axial parts, further limiting the axial movement of the first transmission wheel 91 in the gearbox 1. This improves the stability of the gearbox 1 during the operation of the motor assembly 10, thereby reducing power waste in the motor assembly 10 and lowering energy consumption.

[0091] In some embodiments of the present application, reference is made to Figure 5-Figure 6 As shown, the motor assembly 10 further includes a screw 92. The first transmission wheel 91 has an internally threaded hole. The screw 92 is adapted to engage with the internally threaded hole for transmission, thereby driving the screw 92 to move along its length when the first transmission wheel 91 rotates. The screw 92 is provided with a column connection structure 921 for connecting to the column dynamic column 30. In other words, when the motor 4 is energized, the rotor 43 rotates, driving the motor shaft 41. The rotation of the motor shaft 41 drives the first transmission wheel 91. The rotation of the first transmission wheel 91 drives the screw 92, which in turn drives the column dynamic column 30 to move axially along the screw 92, thereby achieving the purpose of controlling the height adjustment of the steering column through the motor assembly 10.

[0092] Optionally, the moving column connection structure 921 can be a threaded hole, which is used with screws to fix the screw 92 to the pipe column moving column 30; the moving column connection structure 921 can also be a smooth hole, which is used with bolts to fix the screw 92 to the pipe column moving column 30, etc.

[0093] In some embodiments of the present application, reference is made to Figure 5-Figure 6 As shown, a second transmission wheel 411 is provided on the motor shaft 41 , and the second transmission wheel 411 is meshed with the first transmission wheel 91 for transmission.

[0094] In some optional embodiments, the second transmission wheel 411 is a worm portion, and the first transmission wheel 91 is a worm gear, and the worm portion and the worm gear mesh together to form a transmission. In other words, the first transmission wheel 91 can be a worm gear, and the second transmission wheel 411 is a worm portion. When the motor 4 is energized, the motor shaft 41 rotates, and the worm portion on the motor shaft 41 rotates accordingly. The kinetic energy is transferred to the first transmission wheel 91 through the worm gear structure. The first transmission wheel 91 drives the screw 92 to rotate through the internal threaded hole, so that the screw 92 drives the pipe column moving column 30 to move in the axial direction of the screw 92, thereby adjusting the height of the pipe column.

[0095] In other optional embodiments, both the first transmission wheel 91 and the second transmission wheel 411 are gears. When both the first transmission wheel 91 and the second transmission wheel 411 are gears, powering the motor 4 causes the motor shaft 41 to rotate, and the second transmission wheel 411 on the motor shaft 41 rotates accordingly. The first transmission wheel 91 and the second transmission wheel 411 can both be bevel gears. The meshing transmission of the bevel gears of the first transmission wheel 91 and the second transmission wheel 411 changes the direction of motion transmission, so that the second transmission wheel 411 drives the first transmission wheel 91 to rotate, and the first transmission wheel 91 drives the lead screw 92 to rotate through the internal threaded hole, so that the lead screw 92 drives the pipe column moving column 30 to move in the axial direction of the lead screw 92, thereby adjusting the height of the pipe column.

[0096] In some embodiments of the present application, reference is made to Figure 1 As shown, the gearbox 1 is provided with a first housing hole 113 and a second housing hole arranged coaxially. The lead screw 92 passes through the first housing hole 113 and the second housing hole. The movable column connection structure 921 is located at the end of the lead screw 92 extending from the first housing hole 113. The other end of the lead screw 92 extends from the second housing hole and is threadedly connected to a limit nut 93. The outer diameter of the limit nut 93 is larger than the aperture of the second housing hole. The limit nut 93 prevents the lead screw 92 from falling off the gearbox 1. As a result, when the motor assembly 10 drives the lead screw 92 to adjust the height of the pipe column, the lead screw 92 is ensured to remain within the control range of the gearbox 1. This prevents the lead screw 92 from falling off the housing 11 due to excessive adjustment of the pipe column height. This makes it easier to adjust the pipe column height range and protects the motor assembly 10.

[0097] In some embodiments of the present application, see Figure 1-Figure 3 As shown, the bracket 6 includes a first support plate 62, a second support plate 63 and a connecting plate 64. The first support plate 62 and the second support plate 63 are arranged opposite to each other, and the connecting plate 64 connects the first support plate 62 and the second support plate 63. The gear box 1 is located between the first support plate 62 and the second support plate 63. At least one of the first support plate 62, the second support plate 63 and the connecting plate 64 is fixed to the gear box 1. A first bracket hole 621 is provided on the first support plate 62, and a second bracket hole 631 is provided on the second support plate 63. The first bracket hole 621 is located axially outside the first box hole 113, and the second bracket hole 631 is located axially outside the second box hole. The lead screw 92 passes through the first bracket hole 621, the first box hole 113, the second box hole, and the second bracket hole 631 in sequence. In other words, the moving column connection structure 921 is located at one end of the lead screw 92 extending from the first box hole 113 and the first bracket hole 621, and the other end extends from the second box hole and the second bracket hole 631 and is screwed to the limit nut 93. The bracket 6 is fixed on the plane of the gear box 1 to ensure that the relative position of the bracket 6 and the gear box 1 is determined and reliable.

[0098] In some embodiments of the present application, see Figure 10 、 Figure 11As shown, the motor 4 also includes a motor housing 42 and a sealing plug 47. A second bearing hole 48 and a third bearing hole 49 are provided in the motor housing 42. The motor shaft 41 is rotatably supported in the second bearing hole 48 through a second bearing 52 and is rotatably supported in the third bearing hole 49 through a third bearing 53. The second bearing hole 48 is provided on the side of the motor housing 42 away from the gear box 1, which is conducive to improving the smoothness of the rotation of the motor shaft 41. A sealing hole is also provided on the side of the motor housing 42 away from the gear box 1. The second bearing hole 48 is located between the sealing hole and the third bearing hole 49, and the sealing plug 47 is installed in the sealing hole. Therefore, by providing a sealing hole and isolating the internal space of the motor 4 from the external environment through the sealing plug 47, dustproofing of the internal space of the motor 4 can be achieved, ensuring the normal operation of the motor 4, protecting the internal parts of the motor 4 from the external environment, and extending the service life of the motor 4. Figure 10 、 Figure 11 In the example shown, the sealing hole is provided at the left end of the motor housing 42 .

[0099] It should be noted that "the sealing hole and the second bearing hole 48 are arranged opposite each other" can mean that the sealing hole and the second bearing hole 48 are arranged coaxially, or that the sealing hole and the second bearing hole 48 are parallel to each other and offset by a certain distance, so that the projection of the sealing hole and the projection of the second bearing hole 48 at least partially overlap in a plane perpendicular to their axes. In this way, the condition of the second bearing 52 at the second bearing hole 48 can be observed through the sealing hole, and a tool can be inserted into the motor 4 through the sealing hole to adjust the axial position of the motor shaft 41.

[0100] Specifically, the second bearing 52 includes a second inner ring and a second outer ring. The second inner ring is sleeved onto the outer wall of the motor shaft 41, and the second outer ring is fixed to the second bearing hole 48. The second inner ring is rotatable relative to the second outer ring, and rotation of the motor shaft 41 drives the second inner ring to rotate synchronously. A rolling element can be positioned between the second inner ring and the second outer ring to prevent direct friction between the second inner ring and the second outer ring. The provision of the second bearing 52 prevents direct friction between the motor shaft 41 and the motor housing 42, thereby improving the service life of the motor assembly 10.

[0101] Optionally, the second bearing 52 may be an oil-containing bearing having a grease groove filled with lubricating grease, thereby enabling self-lubrication of the second bearing 52 without the need to provide a lubricating oil channel on the inner wall of the motor housing 42 .

[0102] Alternatively, the second bearing 52 may be a grease-free bearing, and a lubricating oil channel may be provided on the inner wall of the motor housing 42 , through which lubricating oil may be sprayed onto the second bearing 52 , thereby achieving oil lubrication of the second bearing 52 .

[0103] Alternatively, the second bearing 52 may be a deep groove ball bearing, a cylindrical roller bearing, or the like.

[0104] Similarly, the third bearing hole 49 can be a deep groove ball bearing, a cylindrical roller bearing, etc. Of course, the third bearing hole 49 can also be a spherical plain bearing.

[0105] In some embodiments of the present application, see Figure 10 、 Figure 11 As shown, the motor 4 further includes a rotor 43, a stator 44 and a motor cover 45. One end of the motor housing 42 is an open end. The rotor 43 is rotatably arranged inside the motor housing 42. The rotor 43 is located on the side of the second bearing hole 48 facing the gear box 1. The motor shaft 41 is fixedly connected to the rotor 43. The stator 44 is fixed to the inner wall of the motor housing 42 and is sleeved around the outer periphery of the rotor 43. The motor cover 45 is arranged on the open end. The motor cover 45 is fixedly connected to the gear box 1, and the motor shaft 41 extends from the motor cover 45. Figure 10 、 Figure 11 In the example shown, the right end of the motor housing 42 is an open end, the rotor 43 is located on the right side of the second bearing hole 48 , and the motor shaft 41 extends rightward from the motor cover 45 .

[0106] In some embodiments of the present application, see Figure 10 、 Figure 11 As shown, motor 4 also includes a rubber cover assembly 46. The rubber cover assembly 46 is provided with a housing for the motor housing 42 and abuts against the motor cover 45. One end of the motor shaft 41 is connected to the rotor 43, while the other end extends from the rubber cover assembly 46 and the motor cover 45, respectively. Thus, when motor 4 is energized, the rotor 43 drives the motor shaft 41 to rotate and provide driving force for the lead screw 92. The motor cover 45 and rubber cover assembly 46 provide dustproof and sealing functions, further improving the stability of the motor assembly 10.

[0107] In some embodiments of the present application, see Figure 1 、 Figure 5 、 Figure 12 As shown, the axial dimension of the elastic member 23 is 5 mm to 8 mm, and the elastic member 23 weighs less than 0.5 g. In contrast, the axial dimension of the positioning copper sleeve used in the related art is generally 3 mm, and the weight is generally 0.5 g. Therefore, compared with the positioning copper sleeve, the elastic member 23 has a longer axial dimension, which can compensate for the axial displacement of the motor shaft 41. The lighter weight of the elastic member 23 helps reduce the overall weight of the motor assembly 10 and reduce energy consumption.

[0108] In some embodiments, the elastic column 3 has a diameter d1 of 5 mm, an axial length L1 of 3 mm to 6 mm, and a weight of 0.05 g. The wear-resistant pad body 21 has a diameter d2 of 6 mm and an axial length L2 of 2 mm. The wear-resistant pad protrusion 22 has a diameter d3 of 1.5 mm and an axial length L3 of 2 mm. The total weight of the wear-resistant pad 2 is 0.09 g. In related art, the positioning copper sleeve has a diameter of 6 mm, an axial length of 3 mm, and a weight of 0.5 g.

[0109] Optionally, the axial length L1 of the elastic column 3 can be 3mm, 4mm, 5mm, 6mm or other values ​​between 3mm and 6mm. Optionally, the total weight of the elastic member 23 can be 0.14g, 0.18g, 0.35g or other values ​​less than 0.5g.

[0110] In some embodiments of the present application, see Figure 10 、 Figure 11 As shown, the axial length of the motor housing 42 is greater than the axial length of the stator 44 , and the axial length of the stator 44 is greater than the axial length of the rotor 43 .

[0111] In some embodiments of the present application, see Figure 10 、 Figure 11 As shown, the outer diameter of the motor housing 42 is less than 30 mm, and the total axial length of the motor 4 is less than 120 mm.

[0112] Alternatively, in some implementations, the outer diameter of the motor housing 42 may be 27 mm, 28 mm, 29 mm, etc., and the total axial length of the motor 4 may be 95 mm, 100 mm, 110 mm, etc. Of course, the outer diameter of the motor housing 42 may also be other values ​​less than 30 mm, and the total axial length of the motor 4 may also be other values ​​less than 120 mm, which are not listed here.

[0113] In one specific embodiment, the motor housing 42 has an outer diameter of 29 mm, a length of 61 mm, and a thickness of 1.2 mm. The stator 44 has an outer diameter of 26.6 mm, the rotor 43 has an outer diameter of 21 mm, and the total axial length of the motor 4 is 110 mm. Due to the reduced overall size of the stator 44 and rotor 43, the outer diameter of the motor housing 42 is smaller, and the total axial length of the motor 4 is shorter, resulting in a smaller structural size of the motor 4 and a lower weight, thereby reducing energy consumption.

[0114] In the related art, the outer diameter of the motor housing is 39 mm, the total axial length of the motor body is 154 mm, and the total weight of the motor body is 650 g. In some embodiments of the present application, the outer diameter of the motor housing 42 is less than 30 mm, and the total axial length of the motor 4 is less than 120 mm. For example, the outer diameter of the motor housing 42 is 29 mm, the total axial length of the motor 4 is 110 mm, and the total weight of the motor 4 is approximately 440 g, thereby achieving lightweighting and reducing energy consumption.

[0115] See Figure 13 As shown, a pipe string assembly 100 according to another embodiment of the present application includes the above-mentioned motor assembly 10 .

[0116] According to the tubular column assembly 100 of the embodiment of the present application, the motor shaft 41 of its motor assembly 10 abuts against the elastic member 23, and the elastic member 23 abuts against the gear box wall. The elastic member 23 serves to limit the axial position of the motor shaft 41 and provides compensation for the axial displacement of the motor shaft 41, thereby optimizing the structure of the motor assembly 10 and eliminating the axial limiting positioning copper sleeve, which is beneficial to reducing the total weight of the motor assembly 10 and reducing energy consumption.

[0117] In some embodiments of the present application, see Figure 1 、 Figure 2 、 Figure 13 As shown, the motor assembly 10 also includes a bracket 6 and a lead screw 92. The gearbox 1 is fixed to the bracket 6. A first transmission wheel 91 is provided within the gearbox 1. The motor 4 is used to drive the first transmission wheel 91 to rotate, and the first transmission wheel 91 is used to drive the lead screw 92 to move linearly. The pipe string assembly 100 also includes a pipe column moving column 30. The bracket 6 is fixed to the pipe column fixed column 20, and the lead screw 92 is in driving connection with the pipe column moving column 30. Therefore, when the motor 4 drives the first transmission wheel 91 to rotate, the first transmission wheel 91 drives the lead screw 92 to move in the axial direction. The bracket 6 is fixed to the pipe column fixed column 20 and remains stationary. The pipe column moving column 30 moves with the lead screw 92, thereby achieving the purpose of controlling the height of the pipe string.

[0118] See Figure 14 As shown, a steering system 200 according to another embodiment of the present application includes the above-mentioned column assembly 100 .

[0119] According to the steering system 200 of the embodiment of the present application, the motor shaft 41 of the motor assembly 10 in its column assembly 100 stops at the elastic member 23, and the elastic member 23 stops at the gear box wall. The elastic member 23 plays a role in axially limiting the motor shaft 41 and providing compensation for the axial displacement of the motor shaft 41, thereby achieving optimization of the structure of the motor assembly 10 and eliminating the axial limiting positioning copper sleeve, which is beneficial to reducing the total weight of the motor assembly 10 and reducing energy consumption.

[0120] See Figure 15 As shown, a vehicle 1000 according to another embodiment of the present application includes the above-mentioned steering system 200.

[0121] According to the vehicle 1000 of the embodiment of the present application, the motor shaft 41 of the motor assembly 10 in its steering system 200 stops at the elastic member 23, and the elastic member 23 stops at the gear box wall. The elastic member 23 plays a role in axially limiting the motor shaft 41 and providing compensation for the axial displacement of the motor shaft 41, thereby achieving optimization of the structure of the motor assembly 10 and eliminating the axial limiting positioning copper sleeve, which is beneficial to reducing the total weight of the motor assembly 10 and reducing energy consumption.

[0122] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0123] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0124] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0125] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A motor assembly (10), characterized in that include: A gear box (1), wherein the gear box (1) has a transmission chamber (114) therein; an elastic member (23), the elastic member (23) being disposed in the transmission cavity (114); A motor (4), the motor (4) comprising a motor shaft (41), the motor shaft (41) extending into the transmission cavity (114), the motor shaft (41) abutting against the elastic member (23) in the axial direction, and the elastic member (23) abutting against the box wall of the gear box (1) in the axial direction.

2. The motor assembly (10) according to claim 1, characterized in that A first bearing hole (112) is provided on a box wall of the gear box (1), the first bearing hole (112) forming a part of the transmission cavity (114), the motor shaft (41) being rotatably supported in the first bearing hole (112) via a first bearing (51), and the motor shaft (41) being stopped at the elastic member (23) after passing through the first bearing hole (112).

3. The motor assembly (10) according to claim 2, characterized in that The elastic member (23) comprises a wear-resistant pad (2) and an elastic column (3); the wear-resistant pad (2) is located between the first bearing hole (112) and the elastic column (3); the motor shaft (41) abuts against the wear-resistant pad (2); the wear-resistant pad (2) abuts against the elastic column (3); and the elastic column (3) abuts against the box wall of the gear box (1).

4. The motor assembly (10) according to claim 3, characterized in that One of the wear-resistant pad (2) and the elastic column (3) has a positioning column hole, and the other includes a main body and a raised portion connected to the main body, the raised portion is embedded in the positioning column hole, and the main body is located outside one axial end of the positioning column hole.

5. The motor assembly (10) according to claim 4, characterized in that The positioning column hole and the first bearing hole (112) are coaxially arranged.

6. The motor assembly (10) according to any one of claims 1 to 5, characterized in that The motor assembly (10) further comprises a bracket (6), the gear box (1) is fixed to the bracket (6), a fixed column connection structure (61) is provided on the bracket (6), and the fixed column connection structure (61) is suitable for being fixedly connected to a column fixed column (20) of a steering column.

7. The motor assembly (10) according to claim 6, characterized in that The gear box (1) and the bracket (6) are engaged with each other via at least one engaging structure, each engaging structure comprising an engaging protrusion provided on one of the gear box (1) and the bracket (6) and an engaging hole provided on the other, the engaging protrusion being adapted to engage with the engaging hole.

8. The motor assembly (10) according to claim 6, characterized in that The gearbox (1) comprises: A box body (11), the transmission cavity (114) is formed in the box body (11), and a plurality of fixing columns (111) are provided on the box body (11); and A box cover (12) is provided at an opening at one end of the box body (11), and the fixing column (111) passes through the box cover (12).

9. The motor assembly (10) according to claim 8, characterized in that The fixing column (111) is a rubber column. After the fixing column (111) passes through the box cover (12), the box cover (12) is fixed to the box body (11) through a hot riveting process.

10. The motor assembly (10) according to claim 6, characterized in that A first limiting structure (115) and a second limiting structure (116) are provided in the transmission cavity (114), and the motor assembly (10) further includes: A first transmission wheel (91), the first transmission wheel (91) is installed in the transmission cavity (114), the motor (4) is used to drive the first transmission wheel (91) to rotate, and one axial end of the first transmission wheel (91) is abutted against the first limiting structure (115).

11. The motor assembly (10) according to claim 10, characterized in that The motor assembly (10) further includes: a sealing ring (94); a mounting groove is provided on the positioning end surface (913) of the first transmission wheel (91); the mounting groove is arranged along the circumference of the first transmission wheel (91); and the sealing ring (94) is installed in the mounting groove; A flat washer (95), one axial side of the flat washer (95) abuts against the sealing ring (94), and the other axial side of the flat washer (95) abuts against the second limiting structure (116).

12. The motor assembly (10) according to any one of claims 1 to 5, characterized in that The motor (4) further comprises: A motor housing (42), wherein a second bearing hole (48) and a third bearing hole (49) are provided in the motor housing (42), the motor shaft (41) is rotatably supported in the second bearing hole (48) through a second bearing (52) and is rotatably supported in the third bearing hole (49) through a third bearing (53), the second bearing hole (48) is provided on a side of the motor housing (42) away from the gear box (1), and a sealing hole is further provided on the side of the motor housing (42) away from the gear box (1), and the second bearing hole (48) is located between the sealing hole and the third bearing hole (49); A sealing plug (47) is installed in the sealing hole.

13. The motor assembly (10) according to claim 1, characterized in that The axial dimension of the elastic member (23) is 5 mm to 8 mm, and the weight of the elastic member (23) is less than 0.5 g.

14. A pipe string assembly (100), characterized in that: The motor assembly (10) comprises the motor assembly (10) according to any one of claims 1 to 13.

15. The pipe string assembly (100) according to claim 14, characterized in that The motor assembly (10) further comprises a bracket (6) and a lead screw (92); the gear box (1) is fixed to the bracket (6); a first transmission wheel (91) is provided in the gear box (1); the motor (4) is used to drive the first transmission wheel (91) to rotate; the first transmission wheel (91) is used to drive the lead screw (92) to move linearly; and the pipe column assembly (100) further comprises: A pipe column fixing post (20), the bracket (6) being fixed to the pipe column fixing post (20); and The pipe column moving column (30) is connected to the pipe column moving column (30) in a transmission manner by the lead screw (92).

16. A steering system (200), characterized in that: The invention comprises a pipe string assembly (100) according to any one of claims 14 to 15.

17. A vehicle (1000), characterized in that Comprising the steering system (200) of claim 16.

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