Transmission mechanism of steering device, steering device, steering system and vehicle

Abstract

The utility model discloses a transmission mechanism of a steering device, the steering device, a steering system and a vehicle, the transmission mechanism comprises a nut, the nut comprises a nut main body and a first mounting part, the first mounting part is arranged on the periphery of the nut main body, and the first mounting part and the end part of the nut main body are arranged at an interval; the belt wheel comprises a belt wheel main body and a second mounting part, the second mounting part is arranged on the belt wheel main body, a shaft hole is formed in the second mounting part, the central axis of the shaft hole and the central axis of the nut main body are collinear, the nut main body is arranged in the shaft hole in a penetrating mode and makes contact with the wall of the shaft hole, and the first mounting part and the second mounting part are matched in an abutting mode in the axial direction of the nut main body. Therefore, through the arrangement of the transmission mechanism, the manufacturing process of the nut and the belt wheel can be easier to realize, and the assembling difficulty between the nut and the belt wheel can be reduced, so that the reduction of the production cost is facilitated, and the production scale is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a transmission mechanism for a steering device, a steering device, a steering system, and a vehicle. Background Technology

[0002] The nut pulley is one of the core components of a belt-driven electric power steering system. It is responsible for converting the torque output by the motor into assistance to help the rack move axially. The working principle of the steering system determines that as long as the car is in use, the motor of the steering system will continuously drive the screw nut to rotate back and forth through the pulley to provide assistance. Therefore, the reliability of the connection between the pulley and the screw nut is very important. Once it becomes loose, the steering system will lose its power assistance, and may even lead to serious consequences such as steering jamming.

[0003] In related technologies, the positioning surface structure of nuts and pulleys is complex, requiring mold forming, resulting in high parts manufacturing costs, and assembly accuracy is not easy to guarantee, making assembly difficult. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a transmission mechanism for a steering device that makes the manufacturing processes of the nut and pulley easier to implement and reduces the assembly difficulty between the nut and pulley, thereby helping to reduce production costs and increase production scale.

[0005] This utility model further proposes a steering device.

[0006] This utility model further proposes a steering system.

[0007] This utility model further proposes a vehicle.

[0008] According to the first aspect of the present invention, the transmission mechanism of the steering device includes: a nut, the nut including a nut body and a first mounting portion, the first mounting portion being disposed on the outer periphery of the nut body and spaced apart from the end of the nut body; a pulley, the pulley including a pulley body and a second mounting portion, the second mounting portion being disposed on the pulley body, the second mounting portion forming a shaft hole, the central axis of the shaft hole being collinear with the central axis of the nut body, the nut body passing through the shaft hole and contacting the wall of the shaft hole, the first mounting portion and the second mounting portion abutting against each other in the axial direction of the nut body.

[0009] Therefore, by setting up this transmission mechanism, the manufacturing process of the nut and pulley can be made easier, and the assembly difficulty between the nut and pulley can be reduced, which helps to reduce production costs and increase production scale.

[0010] In some examples of this utility model, the second mounting part protrudes from one end of the pulley body near the nut body towards the nut body.

[0011] In some examples of this utility model, the second mounting part is constructed in an annular shape, an inner hole is formed inside the pulley body, the diameter of the inner hole is larger than the diameter of the shaft hole, and the outer diameter of the pulley body is larger than the outer diameter of the second mounting part, so as to form a stepped groove between the pulley body and the second mounting part.

[0012] In some examples of this utility model, an inner hole is formed in the pulley body, the second mounting part is located in the inner hole, and the second mounting part does not extend beyond the end of the pulley body near the nut body.

[0013] In some examples of this utility model, the surface of the first mounting part near the pulley body is configured as a first abutting plane, and the surface of the second mounting part near the nut body is configured as a second abutting plane, with the first abutting plane and the second abutting plane engaging in abutting cooperation.

[0014] In some examples of this utility model, the transmission mechanism of the steering device further includes a fastener, which is disposed on the first mounting portion and the second mounting portion.

[0015] In some examples of this utility model, the first mounting part is provided with a threaded hole, the second mounting part is provided with a through hole, and the fastener passes through the threaded hole and the through hole and is threadedly engaged with the threaded hole.

[0016] In some examples of this utility model, there are multiple fasteners, which are distributed at intervals in the circumferential direction of the first mounting portion, and all of the multiple fasteners are disposed in the first mounting portion and the second mounting portion.

[0017] In some examples of this utility model, the outer periphery of the pulley body is provided with teeth and a stop portion is provided at one end away from the nut body, the stop portion protruding outward from the teeth along the radial direction of the pulley body.

[0018] In some examples of this utility model, the outer peripheral wall of the nut body is a machined surface; and / or the wall of the shaft hole is a machined surface; and / or the surface of the first mounting part near the pulley body is a machined surface; and / or the surface of the second mounting part near the nut body is a machined surface.

[0019] In some examples of this utility model, the pulley is an integrally formed metal structural component.

[0020] In some examples of this utility model, the second mounting part is provided with weight reduction holes and / or weight reduction grooves.

[0021] In some examples of this utility model, the nut body has a chamfer on the side near the pulley body.

[0022] In some examples of this utility model, the transmission mechanism of the steering device further includes: a bearing, the bearing being sleeved on the nut body, the inner ring of the bearing abutting against the side of the first mounting portion away from the second mounting portion; and a locking member, the locking member being disposed on the nut body, the locking member abutting against the side of the inner ring of the bearing away from the first mounting portion.

[0023] In some examples of this utility model, the transmission mechanism of the steering device further includes: a first damping member disposed on the side of the outer ring of the bearing near the pulley body; and a second damping member disposed on the side of the outer ring of the bearing away from the pulley body.

[0024] In some examples of this utility model, the transmission mechanism of the steering device further includes: a retaining ring, which is disposed on the side of the first shock absorber near the pulley body.

[0025] The steering device according to the second aspect of the present invention includes: the transmission mechanism of the steering device described above.

[0026] The steering system according to the third aspect of this utility model includes: the steering device described above.

[0027] The vehicle according to the fourth aspect of this utility model includes: the steering system described above.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0030] Figure 1 This is an exploded view of the transmission mechanism according to an embodiment of the present utility model;

[0031] Figure 2 This is a cross-sectional view of the transmission mechanism according to an embodiment of the present utility model;

[0032] Figure 3 This is an exploded cross-sectional view of the transmission mechanism according to an embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of the structure of a nut according to an embodiment of the present utility model;

[0034] Figure 5 This is a cross-sectional view of a nut according to an embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of the pulley structure according to an embodiment of the present utility model;

[0036] Figure 7 This is a structural schematic diagram of the pulley from another angle according to an embodiment of the present utility model;

[0037] Figure 8 This is a partial structural cross-sectional view of the pulley from another angle according to an embodiment of the present utility model.

[0038] Figure label:

[0039] 100. Transmission mechanism;

[0040] 1. Nut; 11. Nut body; 111. Chamfer; 12. First mounting part; 121. First abutting surface; 122. Threaded hole;

[0041] 2. Pulley; 21. Pulley body; 211. Inner hole; 212. Step groove; 213. Tooth; 214. Stop; 22. Second mounting part; 221. Shaft hole; 222. Second abutment plane; 223. Through hole; 2231. Countersunk groove; 224. Weight reduction hole;

[0042] 3. Fasteners; 4. Bearings; 5. Locking components; 6. First shock absorber; 7. Second shock absorber; 8. Retaining ring. Detailed Implementation

[0043] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0044] The following is for reference. Figures 1-8 The transmission mechanism 100 of the steering device according to an embodiment of the present utility model is described, which makes the manufacturing process of the nut 1 and the pulley 2 easier to realize, and also reduces the assembly difficulty between the nut 1 and the pulley 2.

[0045] Combination Figures 1-8 As shown, the transmission mechanism 100 of the steering device according to the first aspect embodiment of the present invention includes a nut 1 and a pulley 2. The nut 1 and pulley 2 are the core components of the belt-driven electric power steering system, primarily responsible for converting the torque output by the motor into assistance to help the lead screw move axially.

[0046] Specifically, the nut 1 includes a nut body 11 and a first mounting part 12. The first mounting part 12 is disposed on the outer periphery of the nut body 11 and is spaced apart from the end of the nut body 11. The pulley 2 includes a pulley body 21 and a second mounting part 22. The second mounting part 22 is disposed on the pulley body 21 and has a shaft hole 221. The central axis of the shaft hole 221 is collinear with the central axis of the nut body 11. The nut body 11 passes through the shaft hole 221 and contacts the wall of the shaft hole 221. The first mounting part 12 and the second mounting part 22 abut against each other in the axial direction of the nut body 11.

[0047] Specifically, the nut body 11 can serve as the main load-bearing structural component of the nut 1. Along the axial direction of the nut body 11, the first mounting part 12 is spaced apart from both ends of the nut body 11. The pulley body 21 can serve as the main load-bearing structural component of the pulley 2. The second mounting part 22 is located at one end of the pulley 2 near the nut 1, which facilitates direct contact between the second mounting part 22 and the first mounting part 12. The nut body 11 can be inserted into the shaft hole 221 of the second mounting part 22, and the outer peripheral surface of the part of the nut body 11 extending into the shaft hole 221 contacts the inner peripheral wall of the shaft hole 221. Since the central axis of the shaft hole 221 is collinear with the central axis of the nut body 11, concentric positioning can be achieved during the assembly of the nut 1 and the pulley 2 simply by inserting the nut body 11 into the shaft hole 221, thereby effectively reducing the assembly difficulty.

[0048] Furthermore, along the axial direction of the nut body 11, the first mounting part 12 on the nut 1 and the second mounting part 22 on the pulley 2 abut against each other. This can limit the axial extension of the nut body 11 through the shaft hole 221 and also form an axial positioning effect on the nut 1, which is beneficial to ensure the relative installation position between the nut 1 and the pulley 2.

[0049] In summary, compared to traditional nuts and pulleys (the positioning surface structure of the pulley shaft hole is complex, requiring mold forming and resulting in high parts manufacturing costs), the nut 1 and pulley 2 in this embodiment have simple structures, which helps to simplify the manufacturing process. Moreover, the assembly process of the two is easier to achieve, which helps to reduce manufacturing costs and is suitable for large-scale production.

[0050] Therefore, by setting up this transmission mechanism 100, the manufacturing process of the nut 1 and the pulley 2 can be made easier, and the assembly difficulty between the nut 1 and the pulley 2 can be reduced, which helps to reduce production costs and increase production scale.

[0051] According to some optional embodiments of the present invention, combined with Figures 1-3 , Figure 6 and Figure 8As shown, the second mounting part 22 protrudes from one end of the pulley body 21 near the nut body 11 towards the nut body 11.

[0052] The second mounting part 22 protrudes from the pulley body 21, which can prevent mistakes and make it easier for assembly personnel to distinguish between the second mounting part 22 and the pulley body 21, thereby reducing assembly difficulty and improving assembly efficiency.

[0053] Specifically, in combination Figure 6 and Figure 8 As shown, the second mounting part 22 is annular in shape, and an inner hole 211 is formed inside the pulley body 21. The diameter of the inner hole 211 is larger than the diameter of the shaft hole 221, and the outer diameter of the pulley body 21 is larger than the outer diameter of the second mounting part 22, so that a stepped groove 212 is formed between the pulley body 21 and the second mounting part 22.

[0054] It is understandable that the outer diameter of the second mounting part 22 is smaller than the outer diameter of the pulley body 21. This allows the second mounting part 22 to make normal end face contact with the first mounting part 12, while also reducing the material used in the second mounting part 22, thus helping to reduce costs and weight. The diameter of the shaft hole 221 is smaller than the diameter of the inner hole 211. This allows for the reduction of material consumption in the pulley body 21 while meeting the structural strength requirements, thus facilitating the lightweight design of the pulley 2. Furthermore, a stepped groove 212 is formed between the pulley body 21 and the second mounting part 22, which helps to provide end face stopping for related mechanisms (such as fasteners 3).

[0055] According to some alternative embodiments of the present invention, an inner hole 211 is formed in the pulley body 21, and a second mounting part 22 is located in the inner hole 211. The second mounting part 22 does not extend beyond the end of the pulley body 21 near the nut body 11.

[0056] As shown above, under the premise of the same bandwidth, the dimension of pulley 2 along the axial direction of nut 1 can be effectively shortened, which is conducive to making the structure of pulley 2 more compact and occupying less space, thereby improving space utilization.

[0057] According to some optional embodiments of the present invention, combined with Figures 4-6 As shown, the surface of the first mounting part 12 near the pulley body 21 is configured as a first abutting plane 121, and the surface of the second mounting part 22 near the nut body 11 is configured as a second abutting plane 222. The first abutting plane 121 and the second abutting plane 222 abut against each other.

[0058] The first abutting plane 121 and the second abutting plane 222 abut against each other in the axial direction of the nut 1. This facilitates the establishment of a stop and limit relationship between the first mounting part 12 and the second mounting part 22. Moreover, the first mounting part 12 and the second mounting part 22 are in surface contact, resulting in a large contact area and more uniform force distribution, avoiding local stress concentration problems, thereby improving the axial limiting effect between the nut 1 and the pulley 2.

[0059] According to some optional embodiments of the present invention, combined with Figures 2-4 and Figure 6 As shown, the transmission mechanism 100 of the steering device also includes a fastener 3, which is disposed on the first mounting portion 12 and the second mounting portion 22. For example, the fastener 3 can be a bolt.

[0060] Specifically, the fastener 3 fixes the first mounting part 12 and the second mounting part 22 together, so that the nut 1 and the pulley 2 can be fixedly connected as a whole, and the nut 1 and the pulley 2 can also be limited in the axial and radial directions to prevent relative rotation between the nut 1 and the pulley 2, thereby ensuring the connection stability of the nut 1 and the pulley 2; moreover, the above connection method is easy to disassemble and assemble, so that users can easily replace and repair the nut 1 and the pulley 2 separately.

[0061] According to some optional embodiments of the present invention, combined with Figures 3-6 As shown, the first mounting part 12 is provided with a threaded hole 122, the second mounting part 22 is provided with a through hole 223, the fastener 3 passes through the threaded hole 122 and the through hole 223, and the fastener 3 is threadedly engaged with the threaded hole 122.

[0062] Specifically, the fastener 3 passes through the through hole 223 of the second mounting part 22 along the axial direction and is threadedly engaged with the threaded hole 122 of the first mounting part 12. This can connect the nut 1 and the pulley 2 into a solid whole, and can also limit the nut 1 in the circumferential and radial directions, thereby ensuring the positional stability of the nut 1 relative to the pulley 2. Moreover, this connection method can facilitate the disassembly and individual replacement of the nut 1 and the pulley 2, thereby improving the convenience and flexibility of installation.

[0063] Furthermore, such as Figure 2 and Figure 3 As shown, the through hole 223 has a countersunk groove 2231 at the end away from the nut 1, so that the head of the fastener 3 can fall into the countersunk groove 2231 without protruding from the surface of the through hole 223, thus achieving a hiding effect on the head of the fastener 3.

[0064] According to some optional embodiments of the present invention, combined with Figures 1-4As shown, there are multiple fasteners 3, which are distributed at intervals in the circumferential direction of the first mounting part 12, and are all disposed in the first mounting part 12 and the second mounting part 22.

[0065] Furthermore, multiple fasteners 3 can increase the force transmission path between the nut 1 and the pulley 2 in the circumferential direction of the nut 1, thereby increasing the connection strength between the nut 1 and the pulley 2, and also enabling the fastening force between the two to be distributed more evenly, avoiding stress concentration, thereby improving the connection stability between the nut 1 and the pulley 2.

[0066] According to some optional embodiments of the present invention, combined with Figure 3 , Figure 6 and Figure 8 As shown, the outer periphery of the pulley body 21 is provided with teeth 213, and the end of the pulley body 21 away from the nut body 11 is provided with a stop 214, which protrudes outward from the teeth 213 along the radial direction of the pulley body 21.

[0067] Specifically, the teeth 213 on the outer periphery of the pulley body 21 can mesh with the teeth on the belt, which is beneficial for transmitting the torque on the belt to the pulley 2, thereby driving the nut 1 to rotate. Along the axial direction of the pulley 2, the pulley body 21 is provided with a stop 214 at the axial end away from the nut body 11, and the stop 214 protrudes outward from the teeth 213 in the radial direction of the pulley 2. This can form an axial stop and limit effect on the belt meshing with the teeth 213, preventing the belt from accidentally slipping or skipping teeth in the axial direction during the transmission of torque to the pulley 2, which is beneficial for ensuring the transmission stability between the belt and the pulley 2.

[0068] Alternatively, the outer peripheral wall of the nut body 11 is a machined surface. Since machining can complete a large number of production and processing steps in a short time while ensuring the processing accuracy of the product, it is beneficial to speed up the production speed and efficiency of the nut body 11, reduce the manufacturing difficulty and manufacturing cost, and is suitable for large-scale mass production.

[0069] Alternatively, the wall of the shaft hole 221 can be machined, which can reduce manual intervention, improve product yield, increase production efficiency, and reduce production costs.

[0070] Alternatively, the surface of the first mounting part 12 near the pulley body 21 can be machined. This allows the surface of the first mounting part 12 near the pulley body 21 to be manufactured by machine, which reduces manual intervention and helps to improve production speed and processing accuracy. This balances product yield and production efficiency, making it suitable for mass production on a production line.

[0071] Alternatively, the surface of the second mounting part 22 near the nut body 11 can be machined. This allows the machine to process the surface of the second mounting part 22 near the nut body 11, enabling the machine to complete the processing quickly and ensuring the product's processing accuracy. This improves production efficiency and quality, and enhances product reliability.

[0072] For example, the final dimensions of the inner wall surface of the shaft hole 221 of the pulley 2 and the plane of the axial end of the second mounting part 22 are formed by a one-time clamping machine to ensure that the dimensions of the shaft hole 221 meet the IT7 grade requirements, while the perpendicularity between the two is ensured by the process method.

[0073] For example, the outer circumferential surface of the nut body 11 and the end face of the second mounting part 22 are machined in one clamping operation, which can ensure the coaxiality of the nut 1 and the pulley 2 and the perpendicularity of the first mounting part 12.

[0074] Optionally, the shaft hole 221 of the pulley 2 can be a complete inner hole or a non-complete inner hole.

[0075] According to some optional embodiments of this utility model, the pulley 2 is an integrally formed metal structural component. This arrangement can reduce the number of parts and assembly time, thereby reducing assembly steps, lowering manufacturing costs, and improving production efficiency. It can also avoid the fitting errors that may occur in traditional multi-part assembly, thereby improving the precision and consistency of the product. It can also reduce stress concentration points (due to the absence of seams and welds), thereby improving the overall structural strength and rigidity of the inner pulley 2, and thus improving the structural reliability of the transmission structure. Moreover, since the pulley 2 is a metal structural component, metal has the characteristics of high structural strength, high rigidity, and wear resistance, which can effectively improve the transmission efficiency and service life of the pulley 2.

[0076] According to some optional embodiments of the present invention, combined with Figure 7 and Figure 8 As shown, the second mounting part 22 is provided with weight-reducing holes 224 and / or weight-reducing grooves. This arrangement can reduce the weight of the second mounting part 22 while meeting the structural strength requirements, which helps to reduce the material consumption of the second mounting part 22, thereby improving the lightweight design effect and reducing manufacturing costs. For example, the weight-reducing holes 224 of the second mounting part 22 are formed by sintering, which reduces processing costs while meeting the high rigidity required by the torque transmission component (i.e., the second mounting part 22). For example, the weight-reducing holes 224 can be round holes or elliptical holes, and are not limited to these.

[0077] According to some optional embodiments of the present invention, combined with Figure 4As shown, a chamfer 111 is provided on the side of the nut body 11 near the pulley body 21. The chamfer 111 can remove burrs generated by machining on the edge of the nut body 11, preventing users from being cut by sharp edges during contact or operation, and improving user safety when assembling the nut 1. In addition, the chamfer 111 can also provide a guiding effect as the nut body 11 extends into the shaft hole 221 of the pulley 2, which is conducive to the quick and smooth assembly of the nut body 11 into the shaft hole 221 of the pulley 2, thereby improving assembly efficiency.

[0078] According to some optional embodiments of the present invention, combined with Figures 1-3 As shown, the transmission mechanism 100 of the steering device also includes a bearing 4 and a locking member 5. The bearing 4 is sleeved on the nut body 11, and the inner ring of the bearing 4 abuts against the side of the first mounting part 12 away from the second mounting part 22. The locking member 5 is disposed on the nut body 11, and the locking member 5 abuts against the side of the inner ring of the bearing 4 away from the first mounting part 12.

[0079] The bearing 4 can support the nut 1 (as a mechanical rotating body) and ensure the rotational accuracy of the nut 1, which is beneficial to improving the rotational stability and accuracy of the nut 1 and extending the service life of the nut 1. Along the axial direction of the nut 1, the two ends of the bearing 4 abut against the locking member 5 and the first mounting part 12 respectively. The locking member 5 and the nut body 11 opposite to the axial direction of the pulley 2 are locked together by a threaded engagement. This can play an axial limiting role for the bearing 4, which is beneficial to ensure the positional stability of the bearing 4 in the axial direction and prevent it from axial displacement, thereby ensuring the structural stability of the transmission mechanism 100.

[0080] Specifically, in combination Figures 1-3 As shown, the transmission mechanism 100 of the steering device also includes a first damping member 6 and a second damping member 7. The first damping member 6 is disposed on the side of the outer ring of the bearing 4 near the pulley body 21, and the second damping member 7 is disposed on the side of the outer ring of the bearing 4 away from the pulley body 21. It can be understood that, along the axial direction of the bearing 4, the first damping member 6 and the second damping member 7 are respectively located at the two ends of the axial direction of the outer ring of the bearing 4, which can help absorb the vibration energy on the bearing 4 and eliminate noise.

[0081] Furthermore, combined Figures 1-3 As shown, the transmission mechanism 100 of the steering device also includes a retaining ring 8, which is disposed on the side of the first damper 6 near the pulley body 21. The retaining ring 8 can axially limit the first damper 6, thereby ensuring that the first damper 6 is in the correct axial position and guaranteeing the accuracy of the first damper 6's rotation.

[0082] According to a second aspect of the present invention, the steering device includes the transmission mechanism 100 of the steering device described in the above embodiment. The steering device also includes a lead screw, a drive source, and a belt. The drive source drives the belt to rotate. The belt meshes with the pulley 2 and transmits torque to the pulley 2. The pulley 2 drives the nut 1 to rotate synchronously. The nut 1 and the lead screw are mutually driven and cooperated. The nut 1 converts its own rotational motion into the axial linear motion of the lead screw, thereby helping the steering device to help the wheels steer.

[0083] The steering system according to a third aspect of the present invention includes the steering device of the above embodiment. The steering system also includes a steering wheel and a control arm. When the user turns the steering wheel, the steering device can convert the rotation direction of the steering wheel into the axial linear motion of the lead screw. The lead screw drives the control arm to rotate in the corresponding direction, thereby achieving the effect of wheel steering.

[0084] The vehicle according to the fourth aspect of the present invention includes the steering system of the above embodiment. Thus, the vehicle having the steering system can reduce manufacturing costs, increase assembly speed and assembly efficiency, thereby enhancing the market competitiveness of the whole vehicle.

[0085] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0086] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0088] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0090] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A transmission mechanism (100) for a steering device, characterized in that, include: Nut (1), the nut (1) includes a nut body (11) and a first mounting part (12), the first mounting part (12) is disposed on the outer periphery of the nut body (11) and spaced apart from the end of the nut body (11); The pulley (2) includes a pulley body (21) and a second mounting part (22). The second mounting part (22) is disposed on the pulley body (21). The second mounting part (22) has a shaft hole (221). The central axis of the shaft hole (221) is collinear with the central axis of the nut body (11). The nut body (11) passes through the shaft hole (221) and contacts the wall of the shaft hole (221). The first mounting part (12) and the second mounting part (22) abut against each other in the axial direction of the nut body (11).

2. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, The second mounting part (22) protrudes from one end of the pulley body (21) near the nut body (11) toward the nut body (11).

3. The transmission mechanism (100) of the steering device according to claim 2, characterized in that, The second mounting part (22) is constructed in an annular shape. An inner hole (211) is formed in the pulley body (21). The diameter of the inner hole (211) is larger than the diameter of the shaft hole (221). The outer diameter of the pulley body (21) is larger than the outer diameter of the second mounting part (22), so that a stepped groove (212) is formed between the pulley body (21) and the second mounting part (22).

4. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, The pulley body (21) has an inner hole (211) formed inside, and the second mounting part (22) is located inside the inner hole (211). The second mounting part (22) does not extend beyond the end of the pulley body (21) near the nut body (11).

5. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, The surface of the first mounting part (12) near the pulley body (21) is configured as a first abutting plane (121), and the surface of the second mounting part (22) near the nut body (11) is configured as a second abutting plane (222). The first abutting plane (121) and the second abutting plane (222) abut against each other.

6. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, Also includes: Fastener (3) is provided on the first mounting part (12) and the second mounting part (22).

7. The transmission mechanism (100) of the steering device according to claim 6, characterized in that, The first mounting part (12) is provided with a threaded hole (122), and the second mounting part (22) is provided with a through hole (223). The fastener (3) passes through the through hole (223) and the threaded hole (122) and is threadedly engaged with the threaded hole (122).

8. The transmission mechanism (100) of the steering device according to claim 6, characterized in that, There are multiple fasteners (3), and the multiple fasteners (3) are distributed at intervals in the circumferential direction of the first mounting part (12). The multiple fasteners (3) are all disposed in the first mounting part (12) and the second mounting part (22).

9. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, The outer periphery of the pulley body (21) is provided with teeth (213) and a stop (214) is provided at one end away from the nut body (11). The stop (214) protrudes outward from the teeth (213) along the radial direction of the pulley body (21).

10. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, The outer peripheral wall of the nut body (11) is a machined surface; and / or The wall of the shaft hole (221) is a machined surface; and / or The surface of the first mounting part (12) near the pulley body (21) is a machined surface; and / or The side surface of the second mounting part (22) near the nut body (11) is a machined surface.

11. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, The pulley (2) is an integrally formed metal structural component.

12. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, The second mounting part (22) is provided with a weight reduction hole (224) and / or a weight reduction groove.

13. The transmission mechanism (100) of the steering device according to claim 1, characterized in that, The nut body (11) has a chamfer (111) on the side near the pulley body (21).

14. The transmission mechanism (100) of the steering device according to any one of claims 1-13, characterized in that, Also includes: The bearing (4) is sleeved on the nut body (11), and the inner ring of the bearing (4) abuts against the side of the first mounting part (12) away from the second mounting part (22); A locking member (5) is disposed on the nut body (11) and abuts against the inner ring of the bearing (4) on the side away from the first mounting part (12).

15. The transmission mechanism (100) of the steering device according to claim 14, characterized in that, Also includes: The first damping component (6) is disposed on the side of the outer ring of the bearing (4) near the pulley body (21); The second damping element (7) is disposed on the side of the outer ring of the bearing (4) away from the pulley body (21).

16. The transmission mechanism (100) of the steering device according to claim 15, characterized in that, Also includes: A retaining ring (8) is disposed on the side of the first shock absorber (6) near the pulley body (21).

17. A steering device, characterized in that, include: The transmission mechanism (100) of the steering device according to any one of claims 1-16.

18. A steering system, characterized in that, include: The steering device according to claim 17.

19. A vehicle, characterized in that, include: The steering system of claim 18.

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