Steering gear and vehicle

Abstract

The present application belongs to the technical field of vehicle steering, and particularly relates to a steering engine and a vehicle. The steering engine comprises a shell, a transmission assembly arranged in the shell, the transmission assembly comprising a movable member and a plurality of screw rods, the movable member being provided with a plurality of through screw holes, and each screw hole being provided with a corresponding screw rod, wherein one end of at least one screw rod extends out of the shell and is adapted to be in transmission connection with a driving mechanism to drive the movable member to move along the extension direction of the screw rod; and an output shaft arranged on the shell, the part of the output shaft in the shell being in engagement with the movable member and being adapted to rotate under the driving of the movable member. Through the technical scheme of the present application, the load capacity of the transmission assembly and the output torque of the output shaft can be increased by using one movable member in cooperation with a plurality of screw rods, the possibility of failure or failure in use is greatly reduced, a hydraulic power-assisted system is not required, the structure is relatively simple, the energy consumption is low, and the load requirement of medium and heavy vehicles can be met.

Description

Technical Field

[0001] This invention belongs to the field of vehicle steering technology, specifically relating to steering gears and vehicles. Background Technology

[0002] In the automotive industry, common medium and heavy-duty vehicles typically employ hydraulic steering systems due to their heavy front axle loads, requiring additional hydraulic power steering mechanisms to meet load requirements. However, this type of steering system involves numerous components, has a complex structure and interconnections, and results in significant energy waste.

[0003] With the development of automotive electrification technology, electric steering systems are increasingly being used in vehicles. However, due to structural limitations, existing electric steering systems have insufficient load-bearing capacity and output torque, limiting their applicability and making it difficult to meet the load requirements of medium and heavy-duty vehicles. They are only suitable for light vehicles such as passenger cars and light trucks, and are difficult to apply in medium and heavy-duty vehicles. Summary of the Invention

[0004] In view of this, in order to improve at least one of the above-mentioned problems existing in the prior art, the present invention provides a steering gear and a vehicle.

[0005] The first aspect of the present invention provides a steering gear, comprising: a housing; a transmission assembly disposed within the housing, the transmission assembly including a movable member and a plurality of screws, the movable member having a plurality of through threaded holes, each threaded hole corresponding to a screw, wherein at least one end of at least one screw extends out of the housing and is adapted to be connected to a drive mechanism for transmission to drive the movable member to move along the extension direction of the screw; and an output shaft disposed on the housing, the portion of the output shaft located within the housing engaging with the movable member and adapted to rotate under the drive of the movable member.

[0006] In one feasible implementation, the plurality of screws includes a driving screw and at least one driven screw, one end of the driving screw extending out of the housing; the transmission assembly further includes: a driving gear sleeved on the driving screw; and a driven gear sleeved on the driven screw; wherein the driving gear meshes with an adjacent driven gear, and the thread of the driving screw has the opposite rotation direction to the thread of the adjacent driven screw, and the rotation direction of each threaded hole is adapted to the rotation direction of the corresponding screw.

[0007] In one feasible implementation, there are multiple driven screws, with the threads of any two adjacent driven screws having opposite directions, and the multiple driven screws meshing sequentially through corresponding driven gears; and / or

[0008] The transmission assembly also includes a guide structure, which is located on one side of the movable part and is arranged along the extension direction of the screw, and the guide structure is in sliding fit with the movable part.

[0009] In one feasible implementation, the driving gear and the driving screw are interference-fitted; the driven gear and the corresponding driven screw are interference-fitted; wherein the driving gear and the driven gear are assembled by integral press fitting.

[0010] In one feasible implementation, the internal thread structure of the threaded hole and the corresponding external thread structure of the screw form a helical raceway, and multiple circulating balls are provided in the helical raceway, which roll in cooperation with the internal thread structure of the threaded hole and the external thread structure of the screw.

[0011] In one feasible implementation, multiple mounting holes are provided on the two opposite side walls of the housing, and the multiple mounting holes are respectively set with corresponding screws, and each mounting hole is provided with a mounting bearing; both ends of each screw are connected to the corresponding mounting bearing.

[0012] In one feasible implementation, a rack structure is provided on the side wall of the moving part facing the output shaft; the part of the output shaft located inside the housing is provided with a meshing structure, and the meshing structure meshes with the rack structure.

[0013] In one feasible implementation, the meshing structure includes: multiple meshing teeth disposed on the side wall of the output shaft facing the rack structure and spaced apart along the circumferential direction of the output shaft, the multiple meshing teeth meshing with the rack structure.

[0014] In one feasible implementation, the meshing structure includes: a meshing gear sleeved on the portion of the output shaft located within the housing, and the meshing gear meshing with a rack structure.

[0015] The second aspect of the present invention provides a vehicle comprising: any of the steering mechanisms described above.

[0016] The beneficial effects of the above-mentioned technical solution of the present invention are reflected in:

[0017] The transmission components of the steering gear have been improved, allowing one moving part to cooperate with multiple screws, which increases the load-bearing capacity of the transmission components and correspondingly increases the output torque of the output shaft. This significantly reduces the possibility of steering gear failure or malfunction during use. The steering gear of this invention can be used as an electric steering gear and form a corresponding electric steering system. It does not require a complex hydraulic power assist system, and its structure is relatively simple with low energy consumption. It is suitable for use in medium and heavy-duty vehicles and can meet their load requirements. Attached image description:

[0018] Figure 1 The figure shown is a cross-sectional view of a steering machine provided in an embodiment of the present invention.

[0019] Figure 2The figure shown is a cross-sectional view of another steering machine provided in one embodiment of the present invention.

[0020] Figure 3 The figure shown is a cross-sectional view of another steering machine provided in one embodiment of the present invention.

[0021] Figure 4 The figure shown is a cross-sectional view of another steering machine provided in one embodiment of the present invention.

[0022] Figure 5 The figure shown is a cross-sectional view of another steering machine provided in one embodiment of the present invention.

[0023] Figure 6 The figure shown is a cross-sectional view of another steering machine provided in one embodiment of the present invention.

[0024] Figure 7 The diagram shown is a schematic block diagram of a vehicle provided in one embodiment of the present invention. Detailed Implementation

[0025] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, top, bottom, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0026] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Application Overview

[0029] In the automotive field, with the development of vehicle electrification technology, electric steering systems are increasingly being used in vehicles. However, current electric steering systems suffer from limitations in load-bearing capacity and output torque due to structural and other constraints, limiting their applicability and making it difficult to meet the load requirements of medium and heavy-duty vehicles. They are only suitable for light vehicles such as passenger cars and light trucks. Medium and heavy-duty vehicles, due to their heavier front axle loads, mostly employ steering systems composed of hydraulic steering systems, and to increase output torque, they typically require additional hydraulic power steering mechanisms. However, such steering systems have numerous components, complex structures and connections, and result in significant energy waste. Electric steering systems, on the other hand, are simple in structure, environmentally friendly, and have promising application prospects. Therefore, there is an urgent need to develop electric steering systems suitable for use in medium and heavy-duty vehicles.

[0030] The following provides some embodiments of the steering gear and vehicle in the technical solution of the present invention.

[0031] In one embodiment of the first aspect of the present invention, a steering gear 100 is provided, such as Figure 1 and Figure 2 As shown, the system includes a housing 1, a transmission assembly 2, and an output shaft 3. The transmission assembly 2 is housed within the housing 1. The transmission assembly 2 includes a movable member 21 and multiple screws 22. The movable member 21 has multiple through threaded holes 211, with corresponding screws 22 positioned within each threaded hole 211, allowing the screws 22 to engage with the movable member 21. When the screws 22 rotate, they drive the movable member 21 to move along the extension direction of the screws 22. At least one end of each screw 22 extends outside the housing 1 and is adapted to be connected to a drive mechanism to form an input shaft, transmitting the output power of the drive mechanism and thus driving the movable member 21. The output shaft 3 passes through the housing 1, and the portion of the output shaft 3 located inside the housing 1 meshes with the movable member 21, rotating under the drive of the movable member 21, thereby outputting torque through the end of the output shaft 3 located outside the housing 1. When the steering gear 100 is connected to the steering wheels via a connecting rod system, it can drive the steering wheels for steering operations.

[0032] It should be noted that the movable part 21 can specifically adopt a nut block structure. The number of screws 22 is not limited to... Figure 1 and Figure 2 The number of screws 22 can be configured with corresponding drive mechanisms, or they can be powered by an integrated multi-output drive mechanism (e.g., a dual-axis motor or a motor with multiple output shafts). The rotation of the multiple screws 22 is adapted to each other so that the displacement of the driven moving part 21 remains consistent. In addition, the steering gear 100 in this embodiment can be used as an electric steering gear, powered by an electric drive mechanism, and form an electric steering system.

[0033] In this embodiment, the steering gear 100 improves and optimizes the transmission component 2. By using a movable part 21 in conjunction with multiple screws 22, the load-bearing capacity of the transmission component 2 can be increased, and the output torque of the output shaft 3 can be increased accordingly. This significantly reduces the possibility of the steering gear 100 malfunctioning or failing during use. The steering gear in this embodiment can be used as an electric steering gear and form an electric steering system. It does not require a complex hydraulic power assist system, and its structure is relatively simple with low energy consumption. It is suitable for use in medium and heavy-duty vehicles and can meet their load requirements.

[0034] In this embodiment, the vehicle can be a medium-sized vehicle, a heavy-duty vehicle, such as a truck, or a light-duty vehicle, such as a light truck or a passenger car. The same applies to the embodiments below.

[0035] In a further embodiment of the invention, the plurality of screws 22 of the steering gear 100 includes a driving screw 221 and at least one driven screw 222, for example... Figure 3 The diagram shows a driving screw 221 and a driven screw 222. Correspondingly, the transmission assembly 2 also includes a driving gear 23 and a driven gear 24; the driving gear 23 is sleeved on the driving screw 221, and the driven gear 24 is sleeved on the driven screw 222. The driving gear 23 meshes with an adjacent driven gear 24. Accordingly, the threads of the driving screw 221 and the adjacent driven screw 222 have opposite directions of rotation, and the thread direction of the corresponding threaded hole 211 on the movable part 21 matches the rotation direction of the corresponding screw 22. When the driving screw 221 rotates under the drive of the drive mechanism, power is transmitted to the driven screw 222 through the meshing between the driving gear 23 and the driven gear 24, driving the driven gear 24 to rotate accordingly. Figure 3 In the example, the driven screw 222 and the driving screw 221 rotate in opposite directions, and through the cooperation of the corresponding threaded hole 211, the moving part 21 can simultaneously receive the driving force of the driving screw 221 and the driven screw 222, and perform the corresponding linear motion.

[0036] By using the screw 22 with opposite thread direction provided in this embodiment to cooperate with the movable part 21, the movable part 21 can also be limited to prevent it from rotating, so that the movable part 21 can maintain a stable state. This eliminates the need for additional rotation limit structure, which helps to further simplify the internal structure of the steering gear 100 and also helps to further reduce costs.

[0037] Furthermore, the plurality of screws 22 includes a driving screw 221 and a plurality of driven screws 222, for example... Figure 4The diagram shows two driven screws 222. A driving screw 221 and the two driven screws 222 are arranged side-by-side. The movable member 21 has three threaded holes 211 corresponding to each driven screw. The screws of adjacent members have opposite rotation directions, and correspondingly, the threads of adjacent threaded holes 211 also have opposite rotation directions. A driving gear 23 is fitted onto the driving screw 221, and a driven gear 24 is fitted onto each driven screw 222. The driving gear 23 meshes sequentially with the two driven gears 24. When the driving screw 221 rotates, power is transmitted through the engagement of the driving gear 23 and the two driven gears 24, driving the two driven screws 222 to rotate. Furthermore, through the engagement of the corresponding threaded holes 211 on the movable member 21, the movable member 21 can simultaneously receive the driving force from both the driving screw 221 and the two driven screws 222, and perform corresponding linear motion.

[0038] It should be noted that the number of screws 22 is not limited to... Figure 3 and Figure 4 In the example shown, more screws 22 can be threaded to the moving part 21 as needed, with adjacent screws 22 having opposite thread directions and meshing with gears to further increase the overall load-bearing capacity of the transmission assembly 2, thereby increasing the output torque. The specific structural form is similar to that of this embodiment and will not be described in detail here.

[0039] Furthermore, such as Figure 3 In the example shown, the transmission assembly 2 also includes a guide structure 25. The guide structure 25 is disposed on one side of the movable member 21 and connected to the housing 1; the guide structure 25 is arranged along the extension direction of the screw 22, and the guide structure 25 is in sliding engagement with the movable member 21. When the movable member 21 moves linearly under the drive of the screw 22, the guide structure 25 can guide the movable member 21 to ensure that the movement trajectory of the movable member 21 is linear, preventing the movable member 21 from moving in the radial direction of the screw 22 (i.e.,...) during the movement. Figure 3 The left-right swaying motion helps improve the stability of the moving part 21 during movement, making the linear motion of the moving part 21 smoother and more stable.

[0040] Among them, the guide structure 25 is not limited to Figure 3 The two shown can also be one or more other quantities; the guide structure 25 can be connected to the side wall, bottom wall or top wall of the housing 1 to fix the guide structure 25. The guide structure 25 can specifically take the form of a guide rail, a slide groove or the like. Correspondingly, a structure matching the guide structure 25 (such as a slider structure) can be provided on the side wall of the movable part 21 facing the guide structure 25 to form a sliding fit with the guide structure 25.

[0041] Furthermore, such as Figure 3 and Figure 4In the example shown, in transmission assembly 2, the driving gear 23 and the driving screw 221 form an interference fit; similarly, the driven gear 24 and the corresponding driven screw 222 also form an interference fit, making the connection between the driving gear 23 and the driving screw 221, and between the driven gear 24 and the driven screw 222, more secure. The driving gear 23 and the driven gear 24 are assembled by integral press fitting, that is, after the driving gear 23 and the driven gear 24 among the multiple screws 22 are meshed, they are then integrally installed into the corresponding threaded holes 211 on the moving part 21. This ensures that the meshing relationship between the gears after assembly matches the threaded fit between each screw 22 and the corresponding threaded hole 211, preventing assembly jamming or interference that could prevent normal assembly.

[0042] It is understandable that during assembly, if each screw 22 is first assembled into the corresponding threaded hole 211 on the movable part 21, and then the driving gear 23 and driven gear 24 are engaged, the differences in size and model between the gears, screws 22, and threaded holes 211 may cause the gears to fail to mesh properly, or cause jamming after meshing, affecting the normal operation of the transmission assembly 2. The overall press-fit assembly method in this embodiment effectively prevents the above situations from occurring.

[0043] In a further embodiment of the present invention, such as Figure 5 As shown, the housing 1 of the steering gear 100 has multiple mounting holes 11 on two opposite side walls for mounting screws 22. The mounting holes 11 are correspondingly arranged with the screws 22, and each mounting hole 11 is provided with a mounting bearing 12; each screw 22 corresponds to two mounting holes 11, and both ends of each screw 22 are connected to the mounting bearing 12 in the corresponding mounting hole 11, so as to achieve a rotational connection with the housing 1 through the mounting bearing 12.

[0044] In a further embodiment of the present invention, such as Figure 5 As shown, in the threaded hole 211 of the movable part 21, the internal thread structure of the threaded hole 211 and the external thread structure of the screw 22 form a helical raceway, and multiple circulating balls 2111 are provided in the helical raceway. The multiple circulating balls 2111 respectively form a rolling fit with the internal thread structure of the threaded hole 211 and the external thread structure of the screw 22. When the screw 22 rotates relative to the threaded hole 211, the multiple circulating balls 2111 can roll in the helical raceway, and the frictional resistance during the rotation of the screw 22 is reduced through the rolling fit.

[0045] It is understandable that when the external thread structure of the screw 22 directly forms a threaded sliding contact with the internal thread structure of the threaded hole 211, the sliding friction resistance during the rotation of the screw 22 is relatively large. However, by adopting the rolling fit of the circulating ball 2111 in this embodiment, the sliding friction can be transformed into rolling friction, and the corresponding friction resistance can be significantly reduced, which is conducive to making the direct fit between the screw 22 and the moving part 21 smoother.

[0046] In a further embodiment of the present invention, such as Figures 1 to 5 As shown, in the steering gear 100, a rack structure 212 is provided on the side wall of the movable part 21 facing the output shaft 3. The rack structure 212 is arranged along the extension direction of the screw 22. Correspondingly, a meshing structure 31 is provided on the part of the output shaft 3 located inside the housing 1. The meshing structure 31 is correspondingly arranged with the rack structure 212 and meshes with it. When the movable part 21 moves linearly under the drive of the screw 22, the output shaft 3 can rotate accordingly through the cooperation between the rack structure 212 and the meshing structure 31, thereby driving the steering wheel to perform steering operation. The rack structure 212 can be integrally formed with the movable part 21, that is, the rack structure 212 is directly machined on the movable part 21. Of course, the rack structure 212 can also be an independent structure, connected to the movable part 21 by welding or bolting.

[0047] Furthermore, in specific implementation methods, such as Figure 5 In the example shown, the meshing structure 31 of the output shaft 3 includes multiple meshing teeth 311, for example... Figure 5 The output shaft 3 has three meshing teeth 311. Multiple meshing teeth 311 are spaced apart in the circumferential direction and mesh with the rack structure 212 on the movable member 21. When the movable member 21 moves upward under the drive of the screw 22, the output shaft 3 rotates clockwise under the action of the rack structure 212 and the multiple meshing teeth 311; when the movable member 21 moves downward under the drive of the screw 22, the output shaft 3 rotates counterclockwise under the action of the rack structure 212 and the multiple meshing teeth 311. Through these two rotations of the output shaft 3, the left and right steering operations of the vehicle's steering wheels are respectively achieved.

[0048] The meshing teeth 311 can be integrally formed with the output shaft 3, for example, the output shaft 3 and the meshing teeth 311 can be directly machined from a single shaft. Alternatively, the meshing teeth 311 can be separate from the output shaft 3, for example, a ring structure or bushing structure with multiple meshing teeth 311 can be fitted onto the output shaft 3. Since the steering operation of the vehicle has a certain limited range, the rotation of the output shaft 3 is also within a corresponding angular range (generally within 180°). Therefore, only a few meshing teeth 311 need to be set on the side of the output shaft 3 facing the rack structure 212, while no meshing teeth 311 need to be set on the side of the output shaft 3 facing away from the rack structure 212, which can reduce the waste of machining materials and reduce space occupation.

[0049] Furthermore, in another implementation, such as Figure 6 In the example shown, the meshing structure 31 of the output shaft 3 includes a meshing gear 312. The meshing gear 312 is sleeved on the portion of the output shaft 3 located inside the housing 1, and meshes with the rack structure 212 on the movable member 21. When the movable member 21 moves linearly under the drive of the screw 22, the output shaft 3 can be rotated accordingly through the engagement between the rack structure 212 and the meshing gear 312, thereby driving the vehicle's steering wheels to perform steering operations.

[0050] Among them, the meshing gear 312 can be a standard part, which can be assembled on the output shaft 3, reducing the machining difficulty and making it easy to implement.

[0051] Furthermore, in this embodiment, the shell 1 can specifically adopt a split assembly structure, including two half-shell structures that can fit together. The two half-shell structures can be fixedly connected by bolts or disassembled to facilitate processing and assembly operations.

[0052] The following is a specific embodiment of the steering gear 100 provided by the present invention.

[0053] like Figure 1 and Figure 2 As shown, the steering gear 100 includes a housing 1, a transmission assembly 2, and an output shaft 3. The transmission assembly 2 is disposed inside the housing 1; the output shaft 3 passes through the housing 1, and the portion of the output shaft 3 located inside the housing 1 is connected to the transmission assembly 2 for transmission, and can rotate under the drive of the transmission assembly 2, thereby outputting torque through the end of the output shaft 3 located outside the housing 1. When the steering gear 100 is connected to the steering wheel via a connecting rod system, it can drive the steering wheel to perform steering operations.

[0054] like Figure 3As shown, the transmission assembly 2 includes two screws 22, two gears, a movable part 21, and two guide structures 25. Specifically, the two screws 22 are arranged in parallel, one of which is a driving screw 221 and the other is a driven screw 222. The driving screw 221 has a left-hand thread, one end of which extends out of the housing 1 and forms an input end, and a driving gear 23 is sleeved on the driving screw 221 near the input end. The driven screw 222 has a right-hand thread, and a driven gear 24 is sleeved on the driven screw 222 at a position corresponding to the driving gear 23, and the driven gear 24 meshes with the driving gear 23.

[0055] Correspondingly, the movable part 21 adopts a nut block structure, and has two threaded holes 211 corresponding to the two screws 22 respectively. The threaded hole 211 corresponding to the driving gear 23 has a left-hand internal thread structure, and the threaded hole 211 corresponding to the driven gear 24 has a right-hand internal thread structure. The driving screw 221 passes into the corresponding threaded hole 211, and the external thread structure of the driving screw 221 and the internal thread structure of the corresponding threaded hole 211 cooperate to form a left-hand helical raceway. Multiple rolling recirculating balls 2111 are provided in the helical raceway, and the recirculating balls 2111 form a rolling fit with the external thread structure of the driving screw 221 and the internal thread structure of the corresponding threaded hole 211 respectively. Similarly, the driven screw 222 passes into the corresponding threaded hole 211, and the external thread structure of the driven screw 222 and the internal thread structure of the corresponding threaded hole 211 cooperate to form a right-hand thread raceway. Multiple rolling recirculating balls 2111 are also provided, which form a rolling fit with the external thread structure of the driven screw 222 and the internal thread structure of the threaded hole 211, respectively. Specifically, the driving screw 221 and the driven screw 222 have the same diameter, only their thread directions are opposite; the two threaded holes 211 also have the same diameter, only their thread directions are opposite.

[0056] like Figure 3 and Figure 5 In the example, two guide structures 25 are spaced apart on one side of the movable part 21 and are both fixedly connected to the bottom wall of the housing 1; both guide structures 25 adopt the form of a sliding groove and are arranged along the extension direction of the screw 22; a corresponding slider structure is provided on the side wall of the movable part 21 facing the guide structure 25, and the movable part 21 forms a sliding fit with the guide structure 25 through the slider structure.

[0057] When the driving screw 221 rotates under the drive of the drive mechanism, power is transmitted to the driven screw 222 through the meshing between the driving gear 23 and the driven gear 24, driving the driven gear 24 to rotate accordingly, such as... Figure 3In the example, the driven screw 222 and the driving screw 221 rotate in opposite directions, and through the engagement of the corresponding threaded hole 211, the movable part 21 can simultaneously receive the driving force of the driving screw 221 and the driven screw 222, and perform corresponding linear motion. When the driving screw 221 and the driven screw 222 rotate relative to the movable part 21, the rolling engagement of the circulating ball 2111 reduces the frictional resistance during rotation. The guide structure 25 guides the movable part 21 to ensure that its movement trajectory is linear, thus making its linear motion smoother and more stable.

[0058] Among them, such as Figure 3 and Figure 5 In the example shown, the driving gear 23 and the driving screw 221 form an interference fit, and the driven gear 24 and the corresponding driven screw 222 also form an interference fit, so that the connection between the driving gear 23 and the driving screw 221, and between the driven gear 24 and the driven screw 222, is more secure. Furthermore, the driving gear 23 and the driven gear 24 are assembled by a press-fit method, that is, after the driving gear 23 and the driven gear 24 among the multiple screws 22 are meshed, they are then integrally installed into the corresponding threaded holes 211 on the moving part 21.

[0059] like Figure 5 As shown, two mounting holes 11 are respectively provided on the two side walls of the housing 1 opposite to the two ends of the screw 22 for mounting the screw 22. The two mounting holes 11 on the same side are respectively provided with the driving screw 221 and the driven screw 222, and each mounting hole 11 is provided with a mounting bearing 12; both ends of each screw 22 are connected to the mounting bearing 12 in the corresponding mounting hole 11 to achieve a rotational connection with the housing 1 through the mounting bearing 12. The input end of the driving screw 221 extends out of the housing 1 through the corresponding mounting hole 11 so that it can form a transmission connection with the drive mechanism when applied in a vehicle, thereby inputting power.

[0060] Similarly, the housing 1 also has mounting holes 11 and bearings on the two side walls opposite to the output shaft 3, so that the output shaft 3 and the housing 1 are also rotatably connected, which will not be described in detail here.

[0061] like Figure 5In the example, the axial directions of the two screws 22 are perpendicular to the axial direction of the output shaft 3, and the output shaft 3 is located on one side of the movable member 21; the movable member 21 has a rack structure 212 on the side facing the output shaft 3, the rack structure 212 and the movable member 21 are integrally formed, and the direction of the rack structure 212 is consistent with the axial direction of the screws 22; correspondingly, the part of the output shaft 3 located inside the housing 1 has a meshing structure 31 corresponding to the rack structure 212, specifically, the meshing structure 31 includes a plurality of meshing teeth 311 (e.g. Figure 5 As shown in the diagram, multiple meshing teeth 311 are spaced apart along the circumferential direction of the output shaft 3 and mesh with the rack structure 212 on the movable member 21. When the movable member 21 moves linearly under the drive of the screw 22, the output shaft 3 can rotate accordingly through the cooperation between the rack structure 212 and the meshing teeth 311, thereby driving the steering wheel to perform steering operation.

[0062] Specifically, such as Figure 5 In the example, when the movable part 21 moves upward under the drive of the screw 22, the output shaft 3 rotates clockwise under the action of the rack structure 212 and multiple meshing teeth 311; when the movable part 21 moves downward under the drive of the screw 22, the output shaft 3 rotates counterclockwise under the action of the rack structure 212 and multiple meshing teeth 311. Through the rotation of the output shaft 3 in these two situations, the left and right steering operations of the vehicle's steering wheels are respectively achieved.

[0063] In another implementation, such as Figure 6 In the example shown, the meshing structure 31 of the output shaft 3 can also be a meshing gear 312. The meshing gear 312 is sleeved on the part of the output shaft 3 located inside the housing 1, and the meshing gear 312 meshes with the rack structure 212 on the movable part 21, and can also rotate accordingly under the drive of the movable part 21. The specific principle is similar to that of the meshing gear, and will not be described in detail here.

[0064] In this embodiment, the steering gear 100 improves and optimizes the transmission component 2. It utilizes a movable component 21 that engages with two screws 22, with the screws 22 rotating in opposite directions and transmitted through a gear structure. This allows the two screws 22 to simultaneously drive the movable component 21, effectively increasing the load-bearing capacity of the transmission component 2 and correspondingly increasing the output torque of the output shaft 3. This significantly reduces the possibility of the steering gear 100 malfunctioning or failing during use. The steering gear 100 can function as an electric steering gear and form an electric steering system. It eliminates the need for a complex hydraulic power steering system, has a relatively simple structure, low energy consumption, and is suitable for use in medium and heavy-duty vehicles, meeting their load requirements. Furthermore, the recirculating ball joint between the screws 22 and the movable component 21 reduces frictional resistance during movement. Simultaneously, the sliding engagement between the movable component 21 and the guide structure 25 provides linear guidance for the movable component 21, further improving stability during movement and making steering operations smoother.

[0065] In a second aspect of the invention, a vehicle 500 is also provided, such as Figure 1 and Figure 7 As shown, the vehicle 500 includes the steering gear 100 in any of the embodiments of the first aspect described above, so as to drive the steering wheels to steer via the steering gear 100. The steering gear 100 employs multiple screws 22 to simultaneously drive the moving parts 21 in linear motion, resulting in stronger overall load-bearing capacity and greater output torque. In application, the steering gear 100 can function as an electric steering gear and form an electric steering system, eliminating the need for a complex hydraulic power steering system. Its structure is relatively simple, and its energy consumption is low. Accordingly, the vehicle 500 in this embodiment can be a medium or heavy-duty vehicle, such as a heavy truck, or a passenger car or light-duty vehicle.

[0066] Furthermore, in practical applications, the vehicle 500 can be equipped with a drive mechanism, steering linkage, steering wheels, etc., corresponding to the steering gear 100. The drive mechanism provides power to the steering gear 100, driving the screw 22 of the steering gear 100 to rotate, which in turn drives the moving part 21 to perform linear motion, correspondingly causing the output shaft 3 to rotate. The output shaft 3 is connected to the steering wheels via the steering linkage, so that the output torque of the output shaft 3 drives the steering linkage to produce corresponding movement, thereby driving the steering wheels to perform steering operations. Specifically, the drive mechanism can be an electric drive mechanism, which can form an electric steering system with the steering gear 100.

[0067] Furthermore, the vehicle 500 in this embodiment also has all the beneficial effects of the steering gear 100 in any of the above embodiments, which will not be repeated here.

[0068] The basic principles of the present invention have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in the present invention are merely examples and not limitations, and should not be considered as essential features of each embodiment of the present invention. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the present invention to the necessity of employing the aforementioned specific details.

[0069] The block diagrams of the devices, apparatuses, devices, and systems involved in this invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it. It should also be noted that in the apparatuses and devices of this invention, the components can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered equivalents of the invention.

[0070] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0071] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the invention. Therefore, the invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features of the invention herein.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steering gear, characterized in that, include: Shell (1); A transmission assembly (2) is disposed inside the housing (1). The transmission assembly (2) includes a movable part (21) and a plurality of screws (22). The movable part (21) is provided with a plurality of through threaded holes (211). Each threaded hole (211) is provided with a corresponding screw (22). At least one end of the screw (22) extends out of the housing (1) and is adapted to be connected to the drive mechanism for transmission to drive the movable part (21) to move along the extension direction of the screw (22). The output shaft (3) is inserted into the housing (1). The part of the output shaft (3) located inside the housing (1) engages with the movable part (21) and is adapted to rotate under the drive of the movable part (21).

2. The steering gear according to claim 1, characterized in that, The plurality of screws (22) include a driving screw (221) and at least one driven screw (222), one end of the driving screw (221) extending out of the housing (1); The transmission assembly (2) also includes: The drive gear (23) is sleeved on the drive screw (221); Driven gear (24) is sleeved on driven screw (222); The driving gear (23) meshes with an adjacent driven gear (24), and the thread of the driving screw (221) is opposite to the thread of the adjacent driven screw (222). The direction of rotation of each threaded hole (211) is adapted to the direction of rotation of the corresponding screw (22).

3. The steering gear according to claim 2, characterized in that, The number of driven screws (222) is multiple, and the threads of any two adjacent driven screws (222) have opposite directions, and the multiple driven screws (222) are sequentially meshed through the corresponding driven gears (24); and / or The transmission assembly (2) further includes a guide structure (25), which is located on one side of the movable member (21) and is arranged along the extension direction of the screw (22), and the guide structure (25) is slidably engaged with the movable member (21).

4. The steering gear according to claim 2, characterized in that, The drive gear (23) and the drive screw (221) are interference fit; The driven gear (24) and the corresponding driven screw (222) are interference fit; The driving gear (23) and the driven gear (24) are assembled by integral pressing.

5. The steering gear according to claim 1, characterized in that, The internal thread structure of the threaded hole (211) and the corresponding external thread structure of the screw (22) form a spiral raceway, and the spiral raceway is provided with a plurality of circulating balls (2111). The circulating balls (2111) are in rolling engagement with the internal thread structure of the threaded hole (211) and the external thread structure of the screw (22).

6. The steering gear according to claim 1, characterized in that, The housing (1) has multiple mounting holes (11) on its two opposite side walls, and the multiple mounting holes (11) are respectively provided with the screw (22), and each mounting hole (11) is provided with a mounting bearing (12); Each of the screws (22) is connected at both ends to the corresponding mounting bearing (12).

7. The steering gear according to any one of claims 1 to 6, characterized in that, The movable part (21) has a rack structure (212) on the side wall facing the output shaft (3); The output shaft (3) is provided with a meshing structure (31) at the part located inside the housing (1), and the meshing structure (31) meshes with the rack structure (212).

8. The steering gear according to claim 7, characterized in that, The meshing structure (31) includes: Multiple meshing teeth (311) are provided on the side wall of the output shaft (3) facing the rack structure (212) and are spaced apart along the circumferential direction of the output shaft (3). The multiple meshing teeth (311) mesh with the rack structure (212).

9. The steering gear according to claim 7, characterized in that, The meshing structure (31) includes: A meshing gear (312) is sleeved on the part of the output shaft (3) located inside the housing (1), and the meshing gear (312) meshes with the rack structure (212).

10. A vehicle, characterized in that, include: The steering gear as described in any one of claims 1 to 9.

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