Wheel steering gear, steering system and vehicle

Abstract

The utility model discloses a wheel steering gear, a steering system and a vehicle. The lead screw sleeve is arranged on the lead screw in a sleeving mode, and the lead screw sleeve is in threaded fit with the lead screw so as to drive the lead screw to move; the rotation angle sensor is used for detecting the rotation angle of the lead screw sleeve so as to obtain the displacement amount of the lead screw. Therefore, by arranging the rotation angle sensor, the obtained circumferential rotation angle of the lead screw sleeve can be converted into the axial linear displacement of the lead screw, and the rotation angle of the rotation angle sensor is not limited, so that the measurement precision of the displacement of the lead screw can be ensured, and the applicability and the measurement reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a wheel steering gear, a steering system and a vehicle. Background Art

[0002] With the development of modern automotive technology and the improvement of road conditions, the requirements for the comfort, handling and safety of automobiles are getting higher and higher. In the prior art, in order to improve the turning flexibility, the straight-line driving stability and the vehicle comfort of vehicles, the rear-wheel follow-up steering technology is added to the vehicle steering technology. That is, through this rear-wheel steering technology, when the vehicle is running at a low speed or understeering occurs, the rear wheels rotate in the opposite direction to the front wheels, so as to achieve the purpose of reducing the turning radius and improving the vehicle flexibility.

[0003] In the related art, the lead screw connecting the two side wheels drives the two side wheels to turn by moving along its own axial direction. The displacement of the lead screw is measured by a linear displacement sensor, with a large error, and it is limited by the measurement stroke of the linear displacement sensor itself. Moreover, the linear displacement sensor occupies a relatively large space, affecting the performance of the entire steering gear. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a wheel steering gear, which can convert the circumferential rotation angle of the lead screw sleeve obtained into the axial linear displacement of the lead screw, and the rotation angle of the angle sensor is not limited, so as to ensure the measurement accuracy of the lead screw displacement.

[0005] The utility model further discloses a steering system.

[0006] The utility model further discloses a vehicle.

[0007] The wheel steering gear according to the first aspect of the utility model includes: a lead screw; a lead screw sleeve sleeved on the lead screw, the lead screw sleeve is in threaded cooperation with the lead screw to drive the lead screw to move; an angle sensor for detecting the rotation angle of the lead screw sleeve to obtain the displacement of the lead screw.

[0008] Thus, by setting the angle sensor, the circumferential rotation angle of the lead screw sleeve obtained can be converted into the axial linear displacement of the lead screw, and the rotation angle of the angle sensor is not limited, so as to ensure the measurement accuracy of the lead screw displacement, and further improve the applicability and measurement reliability.

[0009] In some examples of the present utility model, the corner sensor includes: a body; a rotor, the rotor is arranged on the lead screw sleeve and rotates synchronously with the lead screw sleeve, the rotor is rotatable relative to the body, and the body is used to detect the rotation angle of the rotor.

[0010] In some examples of the present utility model, the body is provided with a rotating hole, the rotor is rotatably arranged in the rotating hole, and the lead screw sleeve penetrates through the rotor along the thickness direction of the rotor.

[0011] In some examples of the present utility model, the wheel steering device further includes: a housing, the lead screw, the lead screw sleeve and the body are arranged in the housing.

[0012] In some examples of the present utility model, one end of the housing along the axial direction of the lead screw forms an opening, and the body is arranged at this end of the housing and covers the opening.

[0013] In some examples of the present utility model, the wheel steering device further includes: a bearing, the bearing is arranged in the housing, and the bearing is sleeved on the lead screw sleeve.

[0014] In some examples of the present utility model, the wheel steering device further includes: a transmission wheel, the transmission wheel is sleeved on the lead screw sleeve and rotates synchronously with the lead screw sleeve, and the transmission wheel is located between the body and the bearing.

[0015] In some examples of the present utility model, one of the lead screw and the housing is provided with a limiting post and the other is provided with a limiting groove, the limiting post is movably arranged in the limiting groove, and the length direction of the limiting groove is parallel to the axial direction of the lead screw.

[0016] In some examples of the present utility model, the wheel steering device further includes: a first mounting fork, the first mounting fork is connected to one end of the lead screw, and the corner sensor is located at the other end of the lead screw.

[0017] In some examples of the present utility model, the wheel steering device further includes: a first mounting fork, the first mounting fork is connected to one end of the lead screw, a connecting shaft, the connecting shaft is connected to the other end of the lead screw; a second mounting fork, the second mounting fork is connected to the connecting shaft.

[0018] In some examples of the present utility model, the wheel steering device further includes: a housing, the lead screw and the lead screw sleeve are arranged in the housing, and the lead screw extends out of the housing; a dust cover, the dust cover is arranged between the housing and the first mounting fork, the dust cover covers the lead screw, and the dust cover is axially telescopic along the lead screw.

[0019] In some examples of the present utility model, the wheel steering gear further includes: a first fastener disposed at the connection between the housing and the dust cover to fix the housing and the dust cover; a second fastener disposed at the connection between the first mounting fork and the dust cover to fix the first mounting fork and the dust cover.

[0020] The steering system according to the second aspect of the present utility model includes: the above-mentioned wheel steering gear.

[0021] The vehicle according to the third aspect of the present utility model includes: the above-mentioned steering system.

[0022] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be learned through the practice of the present utility model. Description of the Drawings

[0023] The above-mentioned and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0024] Figure 1 is a schematic structural diagram of a wheel steering gear (integral type) according to an embodiment of the present utility model;

[0025] Figure 2 is a schematic structural diagram of a wheel steering gear (split type) according to another embodiment of the present utility model;

[0026] Figure 3 is an exploded view of a wheel steering gear (split type) according to another embodiment of the present utility model;

[0027] Figure 4 is a sectional view of a wheel steering gear (split type) according to another embodiment of the present utility model;

[0028] Figure 5 is a partial schematic structural diagram of another wheel steering gear according to an embodiment of the present utility model.

[0029] Reference Signs:

[0030] 100, wheel steering gear;

[0031] 1, lead screw; 2, lead screw sleeve; 3, angle sensor; 31, body; 32, rotor;

[0032] 4, housing; 41, open end; 5, bearing; 51, limit post; 6, transmission wheel;

[0033] 7. First mounting fork; 71. Connecting shaft; 72. Second mounting fork; 73. Dust cover; 74. First fastener; 75. Second fastener. Detailed implementation mode

[0034] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0035] Reference will be made below Figures 1 - 5 to describe the wheel steering gear 100 according to an embodiment of the present invention, which can convert the circumferential rotation angle of the lead screw sleeve 2 obtained into the axial linear displacement of the lead screw 1, and the rotation angle of the angle sensor 3 is not limited, so as to ensure the measurement accuracy of the displacement of the lead screw 1. For example, the wheel steering gear 100 can be a front-wheel steering gear or a rear-wheel steering gear. It will be described below as a rear-wheel steering gear.

[0036] In combination with Figures 1 - 5 as shown, the wheel steering gear 100 according to the first aspect embodiment of the present invention mainly includes a lead screw 1, a lead screw sleeve 2 and an angle sensor 3. Among them, the lead screw 1 can drive the wheel to turn by its own axial movement, and the lead screw 1 is in threaded cooperation with the lead screw sleeve 2. The lead screw sleeve 2 rotates under the action of the driving force and drives the lead screw 1 to move. In this way, the lead screw 1 can be driven to move along the thread by driving the lead screw sleeve 2 to rotate (that is, converting the rotational movement of the lead screw 1 into a linear movement along its own axis), so as to achieve the effect of the lead screw 1 extending or retracting along its own axis. In addition, the angle sensor 3 can measure the circumferential rotation angle of the lead screw sleeve 2 and convert it into the stroke of the lead screw 1 in combination with relevant components, and finally obtain the axial linear displacement of the lead screw 1.

[0037] Specifically, the lead screw sleeve 2 is sleeved on the lead screw 1, and the lead screw sleeve 2 is in threaded cooperation with the lead screw 1 to drive the lead screw 1 to move. The angle sensor 3 is used to detect the rotation angle of the lead screw sleeve 2 to obtain the displacement of the lead screw 1.

[0038] In detail, the lead screw sleeve 2 is sleeved on the outer periphery of the lead screw 1, the lead screw sleeve 2 is fixed along the axial direction, and the lead screw sleeve 2 (for example, the inner wall of the lead screw sleeve 2 forms an internal thread) and the lead screw 1 (for example, the outer periphery of the lead screw 1 forms an external thread) are in threaded cooperation through the internal thread and the external thread. In this way, the lead screw 1 and the lead screw sleeve 2 can be connected and fixed through threaded cooperation with each other, and as the cooperation amount of the internal thread on the inner wall of the lead screw sleeve 2 and the internal thread on the outer periphery of the lead screw 1 increases or decreases, the lead screw 1 also achieves the effect of retracting or extending along its own axis.

[0039] Among them, the thread can better withstand the load force from the axial direction, and the thread fit has self-locking property, so that the lead screw 1 can smoothly and stably perform axial movement, and the risk of the lead screw 1 retracting during the axial movement can also be prevented.

[0040] Further, when the lead screw sleeve 2 is subjected to a driving force, the lead screw sleeve 2 and the lead screw 1 rotate relatively through thread fit. Also, since the axial position of the lead screw sleeve 2 is fixed, the lead screw 1 can perform an extending or retracting action along the axial direction through the relative rotational movement with the lead screw sleeve 2, so as to achieve the effect of controlling the wheel steering.

[0041] Furthermore, the rotation angle sensor 3 rotates synchronously with the lead screw sleeve 2. In this way, the angle value of the circumferential rotation of the lead screw sleeve 2 can be accurately measured, and then through conversion with parameters such as the pitch of the thread on the lead screw 1, the axial linear displacement of the lead screw 1 can be finally obtained. With such an arrangement, compared with a linear measurement sensor (which occupies a large space and is easily restricted by the space layout, so the measurement error is relatively large), since the rotation angle of the rotation angle sensor 3 is not restricted, the rotation angle sensor 3 can avoid being restricted by insufficient stroke, thereby improving applicability, facilitating adaptation to various steering mechanisms, and also improving measurement accuracy to ensure the steering accuracy of the wheel. In addition, the rotation angle sensor 3 has a simpler structure, is more convenient to operate, and can also reduce the occupied space, so that the space compactness and practicality of the wheel steering gear 100 can be effectively improved.

[0042] Thus, by setting the rotation angle sensor 3, the circumferential rotation angle of the lead screw sleeve 2 obtained can be converted into the axial linear displacement of the lead screw 1, and the rotation angle of the rotation angle sensor 3 is not restricted, so as to ensure the measurement accuracy of the displacement of the lead screw 1, and further improve the applicability and measurement reliability.

[0043] According to some alternative embodiments of the present invention, in combination with Figure 3 and Figure 5 as shown, the rotation angle sensor 3 includes a body 31 and a rotor 32. The rotor 32 is arranged on the lead screw sleeve 2, and the rotor 32 rotates synchronously with the lead screw sleeve 2. The rotor 32 is rotatable relative to the body 31, and the body 31 is used to detect the rotation angle of the rotor 32.

[0044] Among them, the main body 31 mainly serves as a supporting structural member of the steering angle sensor 3. The rotor 32 is rotatably arranged on the main body 31, and the rotor 32 can rotate synchronously with the lead screw sleeve 2. In this way, it can be ensured that the main body 31 can accurately detect the rotation angle of the rotor 32 in real time, so as to accurately obtain the rotation angle of the lead screw sleeve 2, and further ensure the accuracy of wheel steering. In addition, the rotor 32 of the steering angle sensor 3 can rotate synchronously with the lead screw sleeve 2, and the main body 31 of the steering angle sensor 3 is fixed. By sensing the rotation angle of the rotor 32 through the sensor, the angle rotated by the lead screw sleeve 2 in the circumferential direction can be obtained, and the signal is output through the sensor connector, the stroke of the trapezoidal lead screw 1 is calculated, and then the axial linear displacement of the trapezoidal lead screw 1 is obtained.

[0045] Furthermore, the main body 31 is provided with a rotating hole, the rotor 32 is rotatably arranged in the rotating hole, and the lead screw sleeve 2 is arranged through the rotor 32 in the thickness direction of the rotor 32. It can be understood that the rotating hole on the main body 31 can provide an installation and accommodation position for the rotor 32, and the rotor 32 can rotate freely in the rotating hole, while one axial end of the lead screw sleeve 2 penetrates through the rotor 32. In this way, it is convenient for the rotor 32 to rotate synchronously with the lead screw sleeve 2, which helps the sensor to sense the rotation angle of the rotor 32 in time, and then combines with the pitch of the lead screw 1 to finally calculate the axial linear displacement of the trapezoidal lead screw 1.

[0046] Even further, in combination with Figure 3 and Figure 5 as shown, the rotor 32 is sleeved on the lead screw sleeve 2. It can be understood that the rotor 32 can be sleeved on the outer circumference of the lead screw sleeve 2 by interference fit. In this way, the connection firmness and tightness of each other can be enhanced, and the extrusion force between the two parts can be evenly distributed, reducing mutual loosening, so as to ensure the synchronous rotation effect between the rotor 32 and the lead screw sleeve 2, and further improve the measurement reliability of the rotation sensor.

[0047] Furthermore, in combination with Figures 1 - 5 as shown, the wheel steering gear 100 further includes a housing 4, and the lead screw 1, the lead screw sleeve 2 and the main body 31 are arranged in the housing 4. That is to say, the housing 4 can play a role in protecting the internal structure and providing an installation and support carrier, and it is the main structural member of the outer contour of the wheel steering gear 100. The lead screw 1, the lead screw sleeve 2 and the main body 31 are all arranged in the housing 4. In this way, the housing 4 can protect the lead screw 1, the lead screw sleeve 2 and the main body 31 from being interfered by external collisions; it can also enable the housing 4 to provide an installation and fixing position for the lead screw 1, the lead screw sleeve 2 and the main body 31, so as to ensure the relative positions of the three, and further ensure the working stability of the three.

[0048] Specifically, in combination with Figures 3 - 5As shown, an open end 41 is formed at one end of the housing 4 along the axial direction of the lead screw 1. The body 31 is disposed at one end of the housing 4, and the body 31 covers the open end 41. It can be understood that an open end 41 is formed at one end of the housing 4 along the axial direction of the lead screw 1, which is beneficial to the internal structure of the housing 4 being assembled into the housing 4 through the open end 41, thereby improving the convenience of assembly and disassembly of the wheel steering gear 100 and the working efficiency of maintenance and replacement of the internal structure of the housing 4.

[0049] In addition, when the wheel steering gear 100 is in a normal static state or working state, the body 31 can be used to hermetically cover the open end 41, thereby preventing the mechanism inside the housing 4 from being directly exposed to the outside, and also preventing foreign objects outside the housing 4 from entering the housing 4, thereby improving the protection of the internal structure of the housing 4 and extending the service life of the wheel steering gear 100.

[0050] Furthermore, in combination with Figure 3 and Figure 4 As shown, the wheel steering gear 100 further includes a bearing 5. The bearing 5 is disposed inside the housing 4, and the bearing 5 is sleeved on the lead screw sleeve 2. That is to say, the bearing 5 inside the housing 4 is sleeved on the lead screw sleeve 2. The bearing 5 can play a role in supporting the lead screw sleeve 2, ensuring the rotation accuracy of the lead screw sleeve 2 during rotation, and transmitting loads and damping vibration, thereby improving the running stability of the lead screw sleeve 2.

[0051] In addition, the bearing 5 can be a ball bearing. The ball bearing can withstand radial and axial loads, smoothly transmit the force to the lead screw sleeve 2, and ensure the normal operation of the wheel steering gear 100; the ball bearing can also reduce the friction resistance. Through the rolling of the steel balls in the ball tracks, rolling friction is formed, thereby reducing the friction force at the contact part between the ball bearing and the lead screw sleeve 2 and reducing energy loss.

[0052] Specifically, in combination with Figure 3 and Figure 4 As shown, a limiting post 51 is provided on one of the lead screw 1 and the housing 4, and a limiting groove is provided on the other of the lead screw 1 and the housing 4. The limiting post 51 is movably disposed in the limiting groove, and the length direction of the limiting groove is parallel to the axial direction of the lead screw 1.

[0053] For example, a limiting post 51 is provided radially on the lead screw 1, and a limiting groove is provided axially on the housing 4. The limiting post 51 is slidably disposed in the limiting groove. In this way, the limiting post 51 can guide the lead screw 1 to move along a specified path, thereby ensuring the movement accuracy and stability of the lead screw 1. Among them, the limiting post 51 can protrude radially from the outer peripheral edge of the lead screw 1, so that while cooperating with the limiting groove, it can also limit the circumferential rotation of the lead screw 1, thereby ensuring the effect that the lead screw 1 can move along its own axial direction.

[0054] In addition, the axial ends of the limiting grooves can stop the axial movement of the limiting posts 51, so as to prevent the lead screw 1 from moving too far away from the lead screw sleeve 2, that is, to limit the maximum moving distance of the lead screw 1 in the direction away from the lead screw sleeve 2, thereby ensuring that the lead screw 1 can have a reasonable and controllable moving range interval.

[0055] According to some alternative embodiments of the present invention, in combination with Figure 3 and Figure 4 As shown, the wheel steering gear 100 further includes a transmission wheel 6. The transmission wheel 6 is sleeved on the lead screw sleeve 2 and rotates synchronously with the lead screw sleeve 2. Among them, the driving source transmits power to the transmission wheel 6, and the transmission wheel 6 then transmits the power to the lead screw sleeve 2. The lead screw sleeve 2 rotates relative to the lead screw 1 to drive the lead screw 1 to move axially. In this way, the power on the driving source can be transmitted to the lead screw sleeve 2, so as to finally achieve the control effect on the axial movement of the lead screw 1. The transmission wheel 6 can be a belt wheel, and the driving mechanism can be in transmission cooperation with the transmission wheel 6 through other transmission wheels and transmission belts.

[0056] In addition, the transmission wheel 6 is located between the body 31 and the bearing 5. Since the transmission wheel 6 is in transmission cooperation with the lead screw sleeve 2, the bearing 5 and the body 31 are respectively located on both sides of the transmission wheel 6. In this way, on the premise that the bearing 5 supports the lead screw sleeve 2 and the rotor 32 on the body 31 rotates synchronously with the lead screw sleeve 2, the torque on both axial sides of the transmission wheel 6 can be balanced, and the body 31 can also provide structural protection for the transmission wheel 6.

[0057] According to some alternative embodiments of the present invention, in combination with Figures 1 - 4 As shown, the wheel steering gear 100 further includes a first mounting fork 7. The first mounting fork 7 is connected to one end of the lead screw 1. Among them, the first mounting fork 7 is axially connected between the lead screw 1 and one side wheel (such as the right wheel), so that the steering acting torque transmitted from the lead screw 1 can be transmitted to the hub of this side wheel, thereby achieving the effect of controlling the steering of one side wheel. Among them, the angle sensor 3 is located at the other end of the lead screw 1. Such an arrangement can effectively utilize the space along the axis of the lead screw 1 of the wheel steering gear 100, that is, one axial end of the lead screw 1 can be connected to the first mounting fork 7 for controlling the vehicle to steer, and the space at the other axial end of the lead screw 1 can be used to install the angle sensor 3. The angle sensor 3 can detect the circumferential rotation angle of the lead screw 1 in real time, so as to effectively improve the utilization rate of the axial space, avoid the problem of structural interference between the first mounting fork 7 and the angle sensor 3, and thus improve the compactness and rationality of the space layout of the wheel steering gear 100.

[0058] Specifically, when the wheel steering gear 100 adopts an integrated wheel steering gear 100, the steering gear further includes a connecting shaft 71 and a second mounting fork 72. The connecting shaft 71 is connected to the other end of the lead screw 1, and the second mounting fork 72 is connected to the connecting shaft 71. It can be understood that the second mounting fork 72 is axially connected between the lead screw 1 and the other wheel (such as the left wheel), so that the steering force moment transmitted from the lead screw 1 can be transmitted to the hub of the wheel on that side, thereby achieving the effect of controlling the steering of the other wheel. Among them, the connecting shaft 71 can extend the force transmission path of the lead screw 1 in the axial direction, so that the lead screw 1 can simultaneously form a steering control effect on both wheels, thereby improving the layout rationality.

[0059] Further, in combination with Figures 1 - 4 As shown, the wheel steering gear 100 further includes a housing 4 and a dust cover 73. The lead screw 1 and the lead screw sleeve 2 are arranged in the housing 4. The lead screw 1 extends out of the housing 4. The dust cover 73 is arranged between the housing 4 and the first mounting fork 7. The dust cover 73 covers the lead screw 1, and the dust cover 73 is axially telescopic along the lead screw 1.

[0060] That is to say, the housing 4 can play a role in protecting, installing and fixing the lead screw 1 and the lead screw sleeve 2. Part of the lead screw 1 extends out of the housing 4 in the axial direction, so that it is convenient for the connection and fixing work of the lead screw 1 and the first mounting fork 7, and the axial movement range of the lead screw 1 can also be increased.

[0061] Among them, the dust cover 73 axially covers the part of the lead screw 1 extending out of the housing 4. The dust cover 73 can play a role in protecting and sealing the part of the lead screw 1 extending out of the housing 4, preventing external sundries from contacting the lead screw 1, so as to ensure the working stability of the lead screw 1; moreover, the dust cover 73 can perform a telescopic action correspondingly with the axial movement of the lead screw 1 to match the axial movement position of the lead screw 1, so as to ensure the dust-proof property and safety of the dust cover 73 when the lead screw 1 moves axially.

[0062] Specifically, in combination with Figures 1 - 4 As shown, the wheel steering gear 100 further includes a first fastener 74 and a second fastener 75. The first fastener 74 is arranged at the connection between the housing 4 and the dust cover 73 to fix the housing 4 and the dust cover 73, and the second fastener 75 is arranged at the connection between the first mounting fork 7 and the dust cover 73 to fix the first mounting fork 7 and the dust cover 73. For example, the first fastener 74 and the second fastener 75 can be clamps, but are not limited thereto.

[0063] It can be understood that the first fastener 74 can tightly connect one axial end of the housing 4 and the dust cover 73 into a whole, thereby ensuring the sealing performance and connection stability between the housing 4 and the dust cover 73; the second fastener 75 can tightly connect the other axial end of the first mounting fork 7 and the dust cover 73 into a whole, thereby ensuring the sealing performance and connection stability between the first mounting fork 7 and the dust cover 73.

[0064] Optionally, when the first fastener 74 and the second fastener 75 are clamps, they mainly make the housing 4 and the dust cover 73 tightly connected to the first mounting fork 7 and the dust cover 73 through clamping or buckling, thereby ensuring the sealing performance and stability at the connection between the housing 4 and the dust cover 73 and at the connection between the first mounting fork 7 and the dust cover 73. Moreover, the clamp connection is also convenient for disassembly and replacement.

[0065] The assembly process and working principle of the angle sensor 3 are introduced below: The driving wheel 6 and the lead screw sleeve 2 are in interference fit, the bearing 5 and the lead screw sleeve 2 are in interference fit, and the bearing 5 and the housing 4 are in transitional fit. The lead screw 1 and the first mounting fork 7 are connected by bolts in a threaded connection. The limit post 51 and the lead screw 1 are in threaded connection, and the lead screw 1 and the lead screw sleeve 2 are in threaded connection. During installation, first press-fit the bearing 5 onto the lead screw sleeve 2, then press-fit this whole onto the housing 4, then press-fit the driving wheel 6 onto the lead screw sleeve 2. After fixing the angle sensor 3, finally weld the rotor 32 of the angle sensor 3 onto the lead screw sleeve 2. By rotating the driving wheel 6, the lead screw sleeve 2 is driven to rotate. Since the lead screw 1 and the first mounting fork 7 are fixed by bolts in a threaded connection, the lead screw 1 is driven to generate an axial displacement through the lead screw sleeve 2, thereby driving the first mounting fork 7 to move axially. Due to the fixed transmission ratio and the fixed lead of the lead screw sleeve 2, the rotor 32 of the angle sensor 3 rotates together with the lead screw sleeve 2, and the body 31 of the angle sensor 3 remains stationary. By the angle sensor 3 sensing the magnitude of the rotation angle of the rotor 32, the circumferential rotation angle of the lead screw sleeve 2 is obtained, and the signal is transmitted through the connector of the angle sensor 3, the stroke of the lead screw 1 is calculated, and finally the magnitude of the axial linear displacement of the lead screw 1 is obtained.

[0066] The steering system according to the second aspect embodiment of the present invention includes the wheel steering gear 100 of the above embodiment. Thus, the steering system having the wheel steering gear 100 can improve the measurement accuracy of the axial movement amount of the lead screw 1.

[0067] The vehicle according to the third aspect embodiment of the present invention includes the steering system of the above embodiment. Thus, the vehicle having the steering system can improve the measurement accuracy of the axial movement amount of the lead screw 1, thereby ensuring the steering accuracy of the wheels, and further improving the practicability and reliability of the vehicle.

[0068] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0069] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0070] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0071] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A wheel steering gear (100), characterized in that: include: Screw (1); A screw sleeve (2), the screw sleeve (2) being sleeved on the screw (1), the screw sleeve (2) being threadably matched with the screw (1) to drive the screw (1) to move; A rotation angle sensor (3), the rotation angle sensor (3) being used to detect the rotation angle of the screw sleeve (2) so as to obtain the displacement of the screw (1).

2. The wheel steering gear (100) according to claim 1, characterized in that: The rotation angle sensor (3) comprises: Ontology(31); A rotor (32), the rotor (32) being arranged on the screw sleeve (2) and rotating synchronously with the screw sleeve (2), the rotor (32) being rotatable relative to the body (31), and the body (31) being used to detect the rotation angle of the rotor (32).

3. The wheel steering gear (100) according to claim 2, characterized in that: The body (31) is provided with a rotating hole, the rotor (32) is rotatably arranged in the rotating hole, and the screw sleeve (2) is penetrated in the rotor (32) along the thickness direction of the rotor (32).

4. The wheel steering gear (100) according to claim 2, characterized in that: Also includes: A housing (4), the screw rod (1), the screw rod sleeve (2) and the body (31) being arranged in the housing (4).

5. The wheel steering gear (100) according to claim 4, characterized in that: An opening (41) is formed at one end of the housing (4) along the axial direction of the screw rod (1), and the body (31) is arranged at the one end of the housing (4) and covers the opening (41).

6. The wheel steering gear (100) according to claim 4, characterized in that: Also includes: A bearing (5), wherein the bearing (5) is arranged in the housing (4), and the bearing (5) is sleeved on the screw sleeve (2).

7. The wheel steering gear (100) according to claim 6, characterized in that: Also includes: A transmission wheel (6), the transmission wheel (6) being sleeved on the screw sleeve (2) and rotating synchronously with the screw sleeve (2), the transmission wheel (6) being located between the body (31) and the bearing (5).

8. The wheel steering gear (100) according to claim 4, characterized in that: One of the screw rod (1) and the housing (4) is provided with a limiting column (51) and the other is provided with a limiting slot, the limiting column (51) is movably arranged in the limiting slot, and the length direction of the limiting slot is parallel to the axial direction of the screw rod (1).

9. The wheel steering gear (100) according to claim 1, characterized in that: Also includes: A first mounting fork (7), wherein the first mounting fork (7) is connected to one end of the screw rod (1), and the rotation angle sensor (3) is located at the other end of the screw rod (1).

10. The wheel steering gear (100) according to claim 1, characterized in that: Also includes: a first mounting fork (7), the first mounting fork (7) being connected to one end of the screw rod (1), A connecting shaft (71), the connecting shaft (71) being connected to the other end of the screw rod (1); A second mounting fork (72), wherein the second mounting fork (72) is connected to the connecting shaft (71).

11. The wheel steering gear (100) according to claim 9 or 10, characterized in that: Also includes: A housing (4), the screw rod (1) and the screw rod sleeve (2) being arranged in the housing (4), and the screw rod (1) extending out of the housing (4); A dust cover (73), the dust cover (73) being arranged between the housing (4) and the first mounting fork (7), the dust cover (73) being arranged to cover the screw rod (1), and the dust cover (73) being retractable along the axial direction of the screw rod (1).

12. The wheel steering gear (100) according to claim 11, characterized in that: Also includes: a first fastener (74), the first fastener (74) being arranged at a connection between the shell (4) and the dust cover (73) so as to fix the shell (4) and the dust cover (73); A second fastener (75), the second fastener (75) being arranged at a connection between the first mounting fork (7) and the dust cover (73) so as to fix the first mounting fork (7) and the dust cover (73).

13. A steering system, characterized in that: include: The wheel steering gear (100) according to any one of claims 1 to 12.

14. A vehicle, characterized in that: include: The steering system of claim 13.

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